diff options
Diffstat (limited to 'lib/isc/include')
94 files changed, 14075 insertions, 0 deletions
diff --git a/lib/isc/include/isc/aes.h b/lib/isc/include/isc/aes.h new file mode 100644 index 0000000..9657494 --- /dev/null +++ b/lib/isc/include/isc/aes.h @@ -0,0 +1,40 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +/*! \file isc/aes.h */ + +#pragma once + +#include <isc/lang.h> +#include <isc/types.h> + +#define ISC_AES128_KEYLENGTH 16U +#define ISC_AES192_KEYLENGTH 24U +#define ISC_AES256_KEYLENGTH 32U +#define ISC_AES_BLOCK_LENGTH 16U + +ISC_LANG_BEGINDECLS + +void +isc_aes128_crypt(const unsigned char *key, const unsigned char *in, + unsigned char *out); + +void +isc_aes192_crypt(const unsigned char *key, const unsigned char *in, + unsigned char *out); + +void +isc_aes256_crypt(const unsigned char *key, const unsigned char *in, + unsigned char *out); + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/align.h b/lib/isc/include/isc/align.h new file mode 100644 index 0000000..7b72e9d --- /dev/null +++ b/lib/isc/include/isc/align.h @@ -0,0 +1,20 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#ifdef HAVE_STDALIGN_H +#include <stdalign.h> +#else /* ifdef HAVE_STDALIGN_H */ +#define alignas(x) __attribute__((__aligned__(x))) +#endif /* ifdef HAVE_STDALIGN_H */ diff --git a/lib/isc/include/isc/app.h b/lib/isc/include/isc/app.h new file mode 100644 index 0000000..1a42bd0 --- /dev/null +++ b/lib/isc/include/isc/app.h @@ -0,0 +1,281 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/***** +***** Module Info +*****/ + +/*! \file isc/app.h + * \brief ISC Application Support + * + * Dealing with program termination can be difficult, especially in a + * multithreaded program. The routines in this module help coordinate + * the shutdown process. They are used as follows by the initial (main) + * thread of the application: + * + *\li isc_app_start(); Call very early in main(), before + * any other threads have been created. + * + *\li isc_app_run(); This will post any on-run events, + * and then block until application + * shutdown is requested. A shutdown + * request is made by calling + * isc_app_shutdown(), or by sending + * SIGINT or SIGTERM to the process. + * After isc_app_run() returns, the + * application should shutdown itself. + * + *\li isc_app_finish(); Call very late in main(). + * + * Applications that want to use SIGHUP/isc_app_reload() to trigger reloading + * should check the result of isc_app_run() and call the reload routine if + * the result is ISC_R_RELOAD. They should then call isc_app_run() again + * to resume waiting for reload or termination. + * + * Use of this module is not required. In particular, isc_app_start() is + * NOT an ISC library initialization routine. + * + * This module also supports per-thread 'application contexts'. With this + * mode, a thread-based application will have a separate context, in which + * it uses other ISC library services such as tasks or timers. Signals are + * not caught in this mode, so that the application can handle the signals + * in its preferred way. + * + * \li MP: + * Clients must ensure that isc_app_start(), isc_app_run(), and + * isc_app_finish() are called at most once. isc_app_shutdown() + * is safe to use by any thread (provided isc_app_start() has been + * called previously). + * + * The same note applies to isc_app_ctxXXX() functions, but in this case + * it's a per-thread restriction. For example, a thread with an + * application context must ensure that isc_app_ctxstart() with the + * context is called at most once. + * + * \li Reliability: + * No anticipated impact. + * + * \li Resources: + * None. + * + * \li Security: + * No anticipated impact. + * + * \li Standards: + * None. + */ + +#include <stdbool.h> + +#include <isc/eventclass.h> +#include <isc/lang.h> +#include <isc/magic.h> +#include <isc/result.h> +#include <isc/types.h> + +/*** + *** Types + ***/ + +typedef isc_event_t isc_appevent_t; + +#define ISC_APPEVENT_FIRSTEVENT (ISC_EVENTCLASS_APP + 0) +#define ISC_APPEVENT_SHUTDOWN (ISC_EVENTCLASS_APP + 1) +#define ISC_APPEVENT_LASTEVENT (ISC_EVENTCLASS_APP + 65535) + +ISC_LANG_BEGINDECLS + +isc_result_t +isc_app_ctxstart(isc_appctx_t *ctx); + +isc_result_t +isc_app_start(void); +/*!< + * \brief Start an ISC library application. + * + * Notes: + * This call should be made before any other ISC library call, and as + * close to the beginning of the application as possible. + * + * Requires: + *\li 'ctx' is a valid application context (for app_ctxstart()). + */ + +isc_result_t +isc_app_ctxonrun(isc_appctx_t *ctx, isc_mem_t *mctx, isc_task_t *task, + isc_taskaction_t action, void *arg); +isc_result_t +isc_app_onrun(isc_mem_t *mctx, isc_task_t *task, isc_taskaction_t action, + void *arg); +/*!< + * \brief Request delivery of an event when the application is run. + * + * Requires: + *\li isc_app_start() has been called. + *\li 'ctx' is a valid application context (for app_ctxonrun()). + * + * Returns: + * ISC_R_SUCCESS + * ISC_R_NOMEMORY + */ + +isc_result_t +isc_app_ctxrun(isc_appctx_t *ctx); + +isc_result_t +isc_app_run(void); +/*!< + * \brief Run an ISC library application. + * + * Notes: + *\li The caller (typically the initial thread of an application) will + * block until shutdown is requested. When the call returns, the + * caller should start shutting down the application. + * + * Requires: + *\li isc_app_[ctx]start() has been called. + * + * Ensures: + *\li Any events requested via isc_app_onrun() will have been posted (in + * FIFO order) before isc_app_run() blocks. + *\li 'ctx' is a valid application context (for app_ctxrun()). + * + * Returns: + *\li ISC_R_SUCCESS Shutdown has been requested. + *\li ISC_R_RELOAD Reload has been requested. + */ + +bool +isc_app_isrunning(void); +/*!< + * \brief Return if the ISC library application is running. + * + * Returns: + *\li true App is running. + *\li false App is not running. + */ + +void +isc_app_ctxshutdown(isc_appctx_t *ctx); + +void +isc_app_shutdown(void); +/*!< + * \brief Request application shutdown. + * + * Notes: + *\li It is safe to call isc_app_shutdown() multiple times. Shutdown will + * only be triggered once. + * + * Requires: + *\li isc_app_[ctx]run() has been called. + *\li 'ctx' is a valid application context (for app_ctxshutdown()). + * + * Returns: + *\li ISC_R_SUCCESS + *\li ISC_R_UNEXPECTED + */ + +void +isc_app_ctxsuspend(isc_appctx_t *ctx); +/*!< + * \brief This has the same behavior as isc_app_ctxsuspend(). + */ + +void +isc_app_reload(void); +/*!< + * \brief Request application reload. + * + * Requires: + *\li isc_app_run() has been called. + * + * Returns: + *\li ISC_R_SUCCESS + *\li ISC_R_UNEXPECTED + */ + +void +isc_app_ctxfinish(isc_appctx_t *ctx); + +void +isc_app_finish(void); +/*!< + * \brief Finish an ISC library application. + * + * Notes: + *\li This call should be made at or near the end of main(). + * + * Requires: + *\li isc_app_start() has been called. + *\li 'ctx' is a valid application context (for app_ctxfinish()). + * + * Ensures: + *\li Any resources allocated by isc_app_start() have been released. + */ + +void +isc_app_block(void); +/*!< + * \brief Indicate that a blocking operation will be performed. + * + * Notes: + *\li If a blocking operation is in process, a call to isc_app_shutdown() + * or an external signal will abort the program, rather than allowing + * clean shutdown. This is primarily useful for reading user input. + * + * Requires: + * \li isc_app_start() has been called. + * \li No other blocking operations are in progress. + */ + +void +isc_app_unblock(void); +/*!< + * \brief Indicate that a blocking operation is complete. + * + * Notes: + * \li When a blocking operation has completed, return the program to a + * state where a call to isc_app_shutdown() or an external signal will + * shutdown normally. + * + * Requires: + * \li isc_app_start() has been called. + * \li isc_app_block() has been called by the same thread. + */ + +isc_result_t +isc_appctx_create(isc_mem_t *mctx, isc_appctx_t **ctxp); +/*!< + * \brief Create an application context. + * + * Requires: + *\li 'mctx' is a valid memory context. + *\li 'ctxp' != NULL && *ctxp == NULL. + */ + +void +isc_appctx_destroy(isc_appctx_t **ctxp); +/*!< + * \brief Destroy an application context. + * + * Requires: + *\li '*ctxp' is a valid application context. + * + * Ensures: + *\li *ctxp == NULL. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/assertions.h b/lib/isc/include/isc/assertions.h new file mode 100644 index 0000000..7eafa16 --- /dev/null +++ b/lib/isc/include/isc/assertions.h @@ -0,0 +1,73 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +/*! \file isc/assertions.h + */ + +#pragma once + +#include <isc/attributes.h> +#include <isc/lang.h> + +ISC_LANG_BEGINDECLS + +/*% isc assertion type */ +typedef enum { + isc_assertiontype_require, + isc_assertiontype_ensure, + isc_assertiontype_insist, + isc_assertiontype_invariant +} isc_assertiontype_t; + +typedef void (*isc_assertioncallback_t)(const char *, int, isc_assertiontype_t, + const char *); + +/* coverity[+kill] */ +noreturn void +isc_assertion_failed(const char *, int, isc_assertiontype_t, const char *); + +void isc_assertion_setcallback(isc_assertioncallback_t); + +const char * +isc_assertion_typetotext(isc_assertiontype_t type); + +#define ISC_REQUIRE(cond) \ + ((void)((cond) || \ + ((isc_assertion_failed)(__FILE__, __LINE__, \ + isc_assertiontype_require, #cond), \ + 0))) + +#define ISC_ENSURE(cond) \ + ((void)((cond) || \ + ((isc_assertion_failed)(__FILE__, __LINE__, \ + isc_assertiontype_ensure, #cond), \ + 0))) + +#define ISC_INSIST(cond) \ + ((void)((cond) || \ + ((isc_assertion_failed)(__FILE__, __LINE__, \ + isc_assertiontype_insist, #cond), \ + 0))) + +#define ISC_INVARIANT(cond) \ + ((void)((cond) || \ + ((isc_assertion_failed)(__FILE__, __LINE__, \ + isc_assertiontype_invariant, #cond), \ + 0))) + +#define ISC_UNREACHABLE() \ + (isc_assertion_failed(__FILE__, __LINE__, isc_assertiontype_insist, \ + "unreachable"), \ + __builtin_unreachable()) + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/astack.h b/lib/isc/include/isc/astack.h new file mode 100644 index 0000000..a4f6762 --- /dev/null +++ b/lib/isc/include/isc/astack.h @@ -0,0 +1,49 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#include <inttypes.h> + +#include <isc/mem.h> +#include <isc/types.h> + +isc_astack_t * +isc_astack_new(isc_mem_t *mctx, size_t size); +/*%< + * Allocate and initialize a new array stack of size 'size'. + */ + +void +isc_astack_destroy(isc_astack_t *stack); +/*%< + * Free an array stack 'stack'. + * + * Requires: + * \li 'stack' is empty. + */ + +bool +isc_astack_trypush(isc_astack_t *stack, void *obj); +/*%< + * Try to push 'obj' onto array stack 'astack'. On failure, either + * because the stack size limit has been reached or because another + * thread has already changed the stack pointer, return 'false'. + */ + +void * +isc_astack_pop(isc_astack_t *stack); +/*%< + * Pop an object off of array stack 'stack'. If the stack is empty, + * return NULL. + */ diff --git a/lib/isc/include/isc/atomic.h b/lib/isc/include/isc/atomic.h new file mode 100644 index 0000000..5a415bc --- /dev/null +++ b/lib/isc/include/isc/atomic.h @@ -0,0 +1,79 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#if HAVE_STDATOMIC_H +#include <stdatomic.h> +#else +#include <isc/stdatomic.h> +#endif + +#include <isc/util.h> + +/* + * We define a few additional macros to make things easier + */ + +/* Relaxed Memory Ordering */ + +#define atomic_store_relaxed(o, v) \ + atomic_store_explicit((o), (v), memory_order_relaxed) +#define atomic_load_relaxed(o) atomic_load_explicit((o), memory_order_relaxed) +#define atomic_fetch_add_relaxed(o, v) \ + atomic_fetch_add_explicit((o), (v), memory_order_relaxed) +#define atomic_fetch_sub_relaxed(o, v) \ + atomic_fetch_sub_explicit((o), (v), memory_order_relaxed) +#define atomic_fetch_or_relaxed(o, v) \ + atomic_fetch_or_explicit((o), (v), memory_order_relaxed) +#define atomic_fetch_and_relaxed(o, v) \ + atomic_fetch_and_explicit((o), (v), memory_order_relaxed) +#define atomic_exchange_relaxed(o, v) \ + atomic_exchange_explicit((o), (v), memory_order_relaxed) +#define atomic_compare_exchange_weak_relaxed(o, e, d) \ + atomic_compare_exchange_weak_explicit( \ + (o), (e), (d), memory_order_relaxed, memory_order_relaxed) +#define atomic_compare_exchange_strong_relaxed(o, e, d) \ + atomic_compare_exchange_strong_explicit( \ + (o), (e), (d), memory_order_relaxed, memory_order_relaxed) +#define atomic_compare_exchange_strong_acq_rel(o, e, d) \ + atomic_compare_exchange_strong_explicit( \ + (o), (e), (d), memory_order_acq_rel, memory_order_acquire) + +/* Acquire-Release Memory Ordering */ + +#define atomic_store_release(o, v) \ + atomic_store_explicit((o), (v), memory_order_release) +#define atomic_load_acquire(o) atomic_load_explicit((o), memory_order_acquire) +#define atomic_fetch_add_release(o, v) \ + atomic_fetch_add_explicit((o), (v), memory_order_release) +#define atomic_fetch_sub_release(o, v) \ + atomic_fetch_sub_explicit((o), (v), memory_order_release) +#define atomic_fetch_and_release(o, v) \ + atomic_fetch_and_explicit((o), (v), memory_order_release) +#define atomic_fetch_or_release(o, v) \ + atomic_fetch_or_explicit((o), (v), memory_order_release) +#define atomic_exchange_acq_rel(o, v) \ + atomic_exchange_explicit((o), (v), memory_order_acq_rel) +#define atomic_fetch_sub_acq_rel(o, v) \ + atomic_fetch_sub_explicit((o), (v), memory_order_acq_rel) +#define atomic_compare_exchange_weak_acq_rel(o, e, d) \ + atomic_compare_exchange_weak_explicit( \ + (o), (e), (d), memory_order_acq_rel, memory_order_acquire) +#define atomic_compare_exchange_strong_acq_rel(o, e, d) \ + atomic_compare_exchange_strong_explicit( \ + (o), (e), (d), memory_order_acq_rel, memory_order_acquire) + +/* compare/exchange that MUST succeed */ +#define atomic_compare_exchange_enforced(o, e, d) \ + RUNTIME_CHECK(atomic_compare_exchange_strong((o), (e), (d))) diff --git a/lib/isc/include/isc/attributes.h b/lib/isc/include/isc/attributes.h new file mode 100644 index 0000000..abe6152 --- /dev/null +++ b/lib/isc/include/isc/attributes.h @@ -0,0 +1,82 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#ifdef HAVE_STDNORETURN_H +#include <stdnoreturn.h> +#elif HAVE_FUNC_ATTRIBUTE_NORETURN +#define noreturn __attribute__((noreturn)) +#else +#define noreturn +#endif + +#if HAVE_FUNC_ATTRIBUTE_RETURNS_NONNULL +#define ISC_ATTR_RETURNS_NONNULL __attribute__((returns_nonnull)) +#else +#define ISC_ATTR_RETURNS_NONNULL +#endif + +#ifdef HAVE_FUNC_ATTRIBUTE_MALLOC +/* + * Indicates that a function is malloc-like, i.e., that the + * pointer P returned by the function cannot alias any other + * pointer valid when the function returns. + */ +#define ISC_ATTR_MALLOC __attribute__((malloc)) +#if HAVE_MALLOC_EXT_ATTR +/* + * Associates deallocator as a suitable deallocation function + * for pointers returned from the function marked with the attribute. + */ +#define ISC_ATTR_DEALLOCATOR(deallocator) __attribute__((malloc(deallocator))) +/* + * Similar to ISC_ATTR_DEALLOCATOR, but allows to speficy an index "idx", + * which denotes the positional argument to which when the pointer is passed + * in calls to deallocator has the effect of deallocating it. + */ +#define ISC_ATTR_DEALLOCATOR_IDX(deallocator, idx) \ + __attribute__((malloc(deallocator, idx))) +/* + * Combines both ISC_ATTR_MALLOC and ISC_ATTR_DEALLOCATOR attributes. + */ +#define ISC_ATTR_MALLOC_DEALLOCATOR(deallocator) \ + __attribute__((malloc, malloc(deallocator))) +/* + * Similar to ISC_ATTR_MALLOC_DEALLOCATOR, but allows to speficy an index "idx", + * which denotes the positional argument to which when the pointer is passed + * in calls to deallocator has the effect of deallocating it. + */ +#define ISC_ATTR_MALLOC_DEALLOCATOR_IDX(deallocator, idx) \ + __attribute__((malloc, malloc(deallocator, idx))) +#else /* #ifdef HAVE_MALLOC_EXT_ATTR */ +/* + * There is support for malloc attribute but not for + * extended attributes, so macros that combine attribute malloc + * with a deallocator will only expand to malloc attribute. + */ +#define ISC_ATTR_DEALLOCATOR(deallocator) +#define ISC_ATTR_DEALLOCATOR_IDX(deallocator, idx) +#define ISC_ATTR_MALLOC_DEALLOCATOR(deallocator) ISC_ATTR_MALLOC +#define ISC_ATTR_MALLOC_DEALLOCATOR_IDX(deallocator, idx) ISC_ATTR_MALLOC +#endif +#else /* #ifdef HAVE_FUNC_ATTRIBUTE_MALLOC */ +/* + * There is no support for malloc attribute. + */ +#define ISC_ATTR_MALLOC +#define ISC_ATTR_DEALLOCATOR(deallocator) +#define ISC_ATTR_DEALLOCATOR_IDX(deallocator, idx) +#define ISC_ATTR_MALLOC_DEALLOCATOR(deallocator) +#define ISC_ATTR_MALLOC_DEALLOCATOR_IDX(deallocator, idx) +#endif /* HAVE_FUNC_ATTRIBUTE_MALLOC */ diff --git a/lib/isc/include/isc/backtrace.h b/lib/isc/include/isc/backtrace.h new file mode 100644 index 0000000..f818c3b --- /dev/null +++ b/lib/isc/include/isc/backtrace.h @@ -0,0 +1,101 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +/*! \file isc/backtrace.h + * \brief provide a back trace of the running process to help debug problems. + * + * This module tries to get a back trace of the process using some platform + * dependent way when available. It also manages an internal symbol table + * that maps function addresses used in the process to their textual symbols. + * This module is expected to be used to help debug when some fatal error + * happens. + * + * IMPORTANT NOTE: since the (major) intended use case of this module is + * dumping a back trace on a fatal error, normally followed by self termination, + * functions defined in this module generally doesn't employ assertion checks + * (if it did, a program bug could cause infinite recursive calls to a + * backtrace function). + */ + +#pragma once + +/*** + *** Imports + ***/ +#include <isc/types.h> + +/*** + *** Functions + ***/ + +ISC_LANG_BEGINDECLS +int +isc_backtrace(void **addrs, int maxaddrs); +/*%< + * Get a back trace of the running process above this function itself. On + * success, addrs[i] will store the address of the call point of the i-th + * stack frame (addrs[0] is the caller of this function). *nframes will store + * the total number of frames. + * + * Requires (note that these are not ensured by assertion checks, see above): + * + *\li 'addrs' is a valid array containing at least 'maxaddrs' void * entries. + * + *\li 'nframes' must be non NULL. + * + * Returns: + * + *\li #ISC_R_SUCCESS + *\li #ISC_R_FAILURE + *\li #ISC_R_NOTFOUND + *\li #ISC_R_NOTIMPLEMENTED + */ + +char ** +isc_backtrace_symbols(void *const *buffer, int size); +/* + * isc_backtrace_symbols() attempts to transform a call stack obtained by + * backtrace() into an array of human-readable strings using dladdr(). The + * array of strings returned has size elements. It is allocated using + * malloc() and should be released using free(). There is no need to free + * the individual strings in the array. + * + * Notes: + * + *\li On Windows, this is shim implementation using SymFromAddr() + *\li On systems with backtrace_symbols(), it's just a thin wrapper + *\li Otherwise, it returns NULL + *\li See platform NOTES for backtrace_symbols + * + * Returns: + * + *\li On success, backtrace_symbols() returns a pointer to the array + *\li On error, NULL is returned. + */ + +void +isc_backtrace_symbols_fd(void *const *buffer, int size, int fd); +/* + * isc_backtrace_symbols_fd() performs the same operation as + * isc_backtrace_symbols(), but the resulting strings are immediately written to + * the file descriptor fd, and are not returned. isc_backtrace_symbols_fd() + * does not call malloc(3), and so can be employed in situations where the + * latter function might fail. + * + * Notes: + * + *\li See isc_backtrace_symbols() notes + *\li See platform NOTES for backtrace_symbols_fd for caveats + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/barrier.h b/lib/isc/include/isc/barrier.h new file mode 100644 index 0000000..a60472f --- /dev/null +++ b/lib/isc/include/isc/barrier.h @@ -0,0 +1,39 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#include <isc/util.h> + +#if HAVE_PTHREAD_BARRIER_INIT + +#include <pthread.h> + +#define isc_barrier_t pthread_barrier_t + +#define isc_barrier_init(barrier, count) \ + pthread_barrier_init(barrier, NULL, count) +#define isc_barrier_destroy(barrier) pthread_barrier_destroy(barrier) +#define isc_barrier_wait(barrier) pthread_barrier_wait(barrier) + +#else + +#include <uv.h> + +#define isc_barrier_t uv_barrier_t + +#define isc_barrier_init(barrier, count) uv_barrier_init(barrier, count) +#define isc_barrier_destroy(barrier) uv_barrier_destroy(barrier) +#define isc_barrier_wait(barrier) uv_barrier_wait(barrier) + +#endif /* __SANITIZE_THREAD__ */ diff --git a/lib/isc/include/isc/base32.h b/lib/isc/include/isc/base32.h new file mode 100644 index 0000000..1faa629 --- /dev/null +++ b/lib/isc/include/isc/base32.h @@ -0,0 +1,143 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file */ + +/* + * Routines for manipulating base 32 and base 32 hex encoded data. + * Based on RFC 4648. + * + * Base 32 hex preserves the sort order of data when it is encoded / + * decoded. + * + * Base 32 hex "np" is base 32 hex but no padding is produced or accepted. + */ + +#include <isc/lang.h> +#include <isc/types.h> + +ISC_LANG_BEGINDECLS + +/*** + *** Functions + ***/ + +isc_result_t +isc_base32_totext(isc_region_t *source, int wordlength, const char *wordbreak, + isc_buffer_t *target); +isc_result_t +isc_base32hex_totext(isc_region_t *source, int wordlength, + const char *wordbreak, isc_buffer_t *target); +isc_result_t +isc_base32hexnp_totext(isc_region_t *source, int wordlength, + const char *wordbreak, isc_buffer_t *target); +/*!< + * \brief Convert data into base32 encoded text. + * + * Notes: + *\li The base32 encoded text in 'target' will be divided into + * words of at most 'wordlength' characters, separated by + * the 'wordbreak' string. No parentheses will surround + * the text. + * + * Requires: + *\li 'source' is a region containing binary data + *\li 'target' is a text buffer containing available space + *\li 'wordbreak' points to a null-terminated string of + * zero or more whitespace characters + * + * Ensures: + *\li target will contain the base32 encoded version of the data + * in source. The 'used' pointer in target will be advanced as + * necessary. + */ + +isc_result_t +isc_base32_decodestring(const char *cstr, isc_buffer_t *target); +isc_result_t +isc_base32hex_decodestring(const char *cstr, isc_buffer_t *target); +isc_result_t +isc_base32hexnp_decodestring(const char *cstr, isc_buffer_t *target); +/*!< + * \brief Decode a null-terminated string in base32, base32hex, or + * base32hex non-padded. + * + * Requires: + *\li 'cstr' is non-null. + *\li 'target' is a valid buffer. + * + * Returns: + *\li #ISC_R_SUCCESS -- the entire decoded representation of 'cstring' + * fit in 'target'. + *\li #ISC_R_BADBASE32 -- 'cstr' is not a valid base32 encoding. + * + * Other error returns are any possible error code from: + *\li isc_lex_create(), + *\li isc_lex_openbuffer(), + *\li isc_base32_tobuffer(). + */ + +isc_result_t +isc_base32_tobuffer(isc_lex_t *lexer, isc_buffer_t *target, int length); +isc_result_t +isc_base32hex_tobuffer(isc_lex_t *lexer, isc_buffer_t *target, int length); +isc_result_t +isc_base32hexnp_tobuffer(isc_lex_t *lexer, isc_buffer_t *target, int length); +/*!< + * \brief Convert text encoded in base32, base32hex, or base32hex + * non-padded from a lexer context into `target`. If 'length' is + * non-negative, it is the expected number of encoded octets to convert. + * + * If 'length' is -1 then 0 or more encoded octets are expected. + * If 'length' is -2 then 1 or more encoded octets are expected. + * + * Returns: + *\li #ISC_R_BADBASE32 -- invalid base32 encoding. + *\li #ISC_R_UNEXPECTEDEND: the text does not contain the expected + * number of encoded octets. + * + * Requires: + *\li 'lexer' is a valid lexer context + *\li 'target' is a buffer containing binary data + *\li 'length' is -2, -1, or non-negative + * + * Ensures: + *\li target will contain the data represented by the base32 encoded + * string parsed by the lexer. No more than `length` octets will + * be read, if `length` is non-negative. The 'used' pointer in + * 'target' will be advanced as necessary. + */ + +isc_result_t +isc_base32_decoderegion(isc_region_t *source, isc_buffer_t *target); +isc_result_t +isc_base32hex_decoderegion(isc_region_t *source, isc_buffer_t *target); +isc_result_t +isc_base32hexnp_decoderegion(isc_region_t *source, isc_buffer_t *target); +/*!< + * \brief Decode a packed (no white space permitted) region in + * base32, base32hex or base32hex non-padded. + * + * Requires: + *\li 'source' is a valid region. + *\li 'target' is a valid buffer. + * + * Returns: + *\li #ISC_R_SUCCESS -- the entire decoded representation of 'cstring' + * fit in 'target'. + *\li #ISC_R_BADBASE32 -- 'source' is not a valid base32 encoding. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/base64.h b/lib/isc/include/isc/base64.h new file mode 100644 index 0000000..b1bc089 --- /dev/null +++ b/lib/isc/include/isc/base64.h @@ -0,0 +1,98 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/base64.h */ + +#include <isc/lang.h> +#include <isc/types.h> + +ISC_LANG_BEGINDECLS + +/*** + *** Functions + ***/ + +isc_result_t +isc_base64_totext(isc_region_t *source, int wordlength, const char *wordbreak, + isc_buffer_t *target); +/*!< + * \brief Convert data into base64 encoded text. + * + * Notes: + *\li The base64 encoded text in 'target' will be divided into + * words of at most 'wordlength' characters, separated by + * the 'wordbreak' string. No parentheses will surround + * the text. + * + * Requires: + *\li 'source' is a region containing binary data + *\li 'target' is a text buffer containing available space + *\li 'wordbreak' points to a null-terminated string of + * zero or more whitespace characters + * + * Ensures: + *\li target will contain the base64 encoded version of the data + * in source. The 'used' pointer in target will be advanced as + * necessary. + */ + +isc_result_t +isc_base64_decodestring(const char *cstr, isc_buffer_t *target); +/*!< + * \brief Decode a null-terminated base64 string. + * + * Requires: + *\li 'cstr' is non-null. + *\li 'target' is a valid buffer. + * + * Returns: + *\li #ISC_R_SUCCESS -- the entire decoded representation of 'cstring' + * fit in 'target'. + *\li #ISC_R_BADBASE64 -- 'cstr' is not a valid base64 encoding. + * + * Other error returns are any possible error code from: + *\li isc_lex_create(), + *\li isc_lex_openbuffer(), + *\li isc_base64_tobuffer(). + */ + +isc_result_t +isc_base64_tobuffer(isc_lex_t *lexer, isc_buffer_t *target, int length); +/*!< + * \brief Convert base64 encoded text from a lexer context into + * `target`. If 'length' is non-negative, it is the expected number of + * encoded octets to convert. + * + * If 'length' is -1 then 0 or more encoded octets are expected. + * If 'length' is -2 then 1 or more encoded octets are expected. + * + * Returns: + *\li #ISC_R_BADBASE64 -- invalid base64 encoding. + *\li #ISC_R_UNEXPECTEDEND: the text does not contain the expected + * number of encoded octets. + * + * Requires: + *\li 'lexer' is a valid lexer context + *\li 'target' is a buffer containing binary data + *\li 'length' is -2, -1, or non-negative + * + * Ensures: + *\li target will contain the data represented by the base64 encoded + * string parsed by the lexer. No more than `length` octets will + * be read, if `length` is non-negative. The 'used' pointer in + * 'target' will be advanced as necessary. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/buffer.h b/lib/isc/include/isc/buffer.h new file mode 100644 index 0000000..1be0081 --- /dev/null +++ b/lib/isc/include/isc/buffer.h @@ -0,0 +1,1023 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/***** +***** Module Info +*****/ + +/*! \file isc/buffer.h + * + * \brief A buffer is a region of memory, together with a set of related + * subregions. Buffers are used for parsing and I/O operations. + * + * The 'used region' and the 'available region' are disjoint, and their + * union is the buffer's region. The used region extends from the beginning + * of the buffer region to the last used byte. The available region + * extends from one byte greater than the last used byte to the end of the + * buffer's region. The size of the used region can be changed using various + * buffer commands. Initially, the used region is empty. + * + * The used region is further subdivided into two disjoint regions: the + * 'consumed region' and the 'remaining region'. The union of these two + * regions is the used region. The consumed region extends from the beginning + * of the used region to the byte before the 'current' offset (if any). The + * 'remaining' region extends from the current offset to the end of the used + * region. The size of the consumed region can be changed using various + * buffer commands. Initially, the consumed region is empty. + * + * The 'active region' is an (optional) subregion of the remaining region. + * It extends from the current offset to an offset in the remaining region + * that is selected with isc_buffer_setactive(). Initially, the active region + * is empty. If the current offset advances beyond the chosen offset, the + * active region will also be empty. + * + * \verbatim + * /------------entire length---------------\ + * /----- used region -----\/-- available --\ + * +----------------------------------------+ + * | consumed | remaining | | + * +----------------------------------------+ + * a b c d e + * + * a == base of buffer. + * b == current pointer. Can be anywhere between a and d. + * c == active pointer. Meaningful between b and d. + * d == used pointer. + * e == length of buffer. + * + * a-e == entire length of buffer. + * a-d == used region. + * a-b == consumed region. + * b-d == remaining region. + * b-c == optional active region. + *\endverbatim + * + * The following invariants are maintained by all routines: + * + *\code + * length > 0 + * + * base is a valid pointer to length bytes of memory + * + * 0 <= used <= length + * + * 0 <= current <= used + * + * 0 <= active <= used + * (although active < current implies empty active region) + *\endcode + * + * \li MP: + * Buffers have no synchronization. Clients must ensure exclusive + * access. + * + * \li Reliability: + * No anticipated impact. + * + * \li Resources: + * Memory: 1 pointer + 6 unsigned integers per buffer. + * + * \li Security: + * No anticipated impact. + * + * \li Standards: + * None. + */ + +/*** + *** Imports + ***/ + +#include <inttypes.h> +#include <stdbool.h> + +#include <isc/assertions.h> +#include <isc/formatcheck.h> +#include <isc/lang.h> +#include <isc/list.h> +#include <isc/magic.h> +#include <isc/region.h> +#include <isc/string.h> +#include <isc/types.h> + +ISC_LANG_BEGINDECLS + +/*@{*/ +/*! + *** Magic numbers + ***/ +#define ISC_BUFFER_MAGIC 0x42756621U /* Buf!. */ +#define ISC_BUFFER_VALID(b) ISC_MAGIC_VALID(b, ISC_BUFFER_MAGIC) +/*@}*/ + +/*! + * Size granularity for dynamically resizable buffers; when reserving + * space in a buffer, we round the allocated buffer length up to the + * nearest * multiple of this value. + */ +#define ISC_BUFFER_INCR 2048 + +/* + * The following macros MUST be used only on valid buffers. It is the + * caller's responsibility to ensure this by using the ISC_BUFFER_VALID + * check above, or by calling another isc_buffer_*() function (rather than + * another macro.) + */ + +/*@{*/ +/*! + * Fundamental buffer elements. (A through E in the introductory comment.) + */ +#define isc_buffer_base(b) ((void *)(b)->base) /*a*/ +#define isc_buffer_current(b) \ + ((void *)((unsigned char *)(b)->base + (b)->current)) /*b*/ +#define isc_buffer_active(b) \ + ((void *)((unsigned char *)(b)->base + (b)->active)) /*c*/ +#define isc_buffer_used(b) \ + ((void *)((unsigned char *)(b)->base + (b)->used)) /*d*/ +#define isc_buffer_length(b) ((b)->length) /*e*/ +/*@}*/ + +/*@{*/ +/*! + * Derived lengths. (Described in the introductory comment.) + */ +#define isc_buffer_usedlength(b) ((b)->used) /* d-a */ +#define isc_buffer_consumedlength(b) ((b)->current) /* b-a */ +#define isc_buffer_remaininglength(b) ((b)->used - (b)->current) /* d-b */ +#define isc_buffer_activelength(b) ((b)->active - (b)->current) /* c-b */ +#define isc_buffer_availablelength(b) ((b)->length - (b)->used) /* e-d */ +/*@}*/ + +/*! + * Note that the buffer structure is public. This is principally so buffer + * operations can be implemented using macros. Applications are strongly + * discouraged from directly manipulating the structure. + */ + +struct isc_buffer { + unsigned int magic; + void *base; + /*@{*/ + /*! The following integers are byte offsets from 'base'. */ + unsigned int length; + unsigned int used; + unsigned int current; + unsigned int active; + /*@}*/ + /*! linkable */ + ISC_LINK(isc_buffer_t) link; + /*! private internal elements */ + isc_mem_t *mctx; + /* automatically realloc buffer at put* */ + bool autore; +}; + +/*** + *** Functions + ***/ + +void +isc_buffer_allocate(isc_mem_t *mctx, isc_buffer_t **dynbuffer, + unsigned int length); +/*!< + * \brief Allocate a dynamic linkable buffer which has "length" bytes in the + * data region. + * + * Requires: + *\li "mctx" is valid. + * + *\li "dynbuffer" is non-NULL, and "*dynbuffer" is NULL. + * + * Note: + *\li Changing the buffer's length field is not permitted. + */ + +isc_result_t +isc_buffer_reserve(isc_buffer_t **dynbuffer, unsigned int size); +/*!< + * \brief Make "size" bytes of space available in the buffer. The buffer + * pointer may move when you call this function. + * + * Requires: + *\li "dynbuffer" is not NULL. + * + *\li "*dynbuffer" is a valid dynamic buffer. + * + * Returns: + *\li ISC_R_SUCCESS - success + *\li ISC_R_NOMEMORY - no memory available + * + * Ensures: + *\li "*dynbuffer" will be valid on return and will contain all the + * original data. However, the buffer pointer may be moved during + * reallocation. + */ + +void +isc_buffer_free(isc_buffer_t **dynbuffer); +/*!< + * \brief Release resources allocated for a dynamic buffer. + * + * Requires: + *\li "dynbuffer" is not NULL. + * + *\li "*dynbuffer" is a valid dynamic buffer. + * + * Ensures: + *\li "*dynbuffer" will be NULL on return, and all memory associated with + * the dynamic buffer is returned to the memory context used in + * isc_buffer_allocate(). + */ + +void +isc__buffer_initnull(isc_buffer_t *b); + +void +isc_buffer_reinit(isc_buffer_t *b, void *base, unsigned int length); +/*!< + * \brief Make 'b' refer to the 'length'-byte region starting at base. + * Any existing data will be copied. + * + * Requires: + * + *\li 'length' > 0 AND length >= previous length + * + *\li 'base' is a pointer to a sequence of 'length' bytes. + * + */ + +void +isc_buffer_setautorealloc(isc_buffer_t *b, bool enable); +/*!< + * \brief Enable or disable autoreallocation on 'b'. + * + * Requires: + *\li 'b' is a valid dynamic buffer (b->mctx != NULL). + * + */ + +void +isc_buffer_compact(isc_buffer_t *b); +/*!< + * \brief Compact the used region by moving the remaining region so it occurs + * at the start of the buffer. The used region is shrunk by the size of + * the consumed region, and the consumed region is then made empty. + * + * Requires: + * + *\li 'b' is a valid buffer + * + * Ensures: + * + *\li current == 0 + * + *\li The size of the used region is now equal to the size of the remaining + * region (as it was before the call). The contents of the used region + * are those of the remaining region (as it was before the call). + */ + +uint8_t +isc_buffer_getuint8(isc_buffer_t *b); +/*!< + * \brief Read an unsigned 8-bit integer from 'b' and return it. + * + * Requires: + * + *\li 'b' is a valid buffer. + * + *\li The length of the remaining region of 'b' is at least 1. + * + * Ensures: + * + *\li The current pointer in 'b' is advanced by 1. + * + * Returns: + * + *\li A 8-bit unsigned integer. + */ + +uint16_t +isc_buffer_getuint16(isc_buffer_t *b); +/*!< + * \brief Read an unsigned 16-bit integer in network byte order from 'b', + * convert it to host byte order, and return it. + * + * Requires: + * + *\li 'b' is a valid buffer. + * + *\li The length of the remaining region of 'b' is at least 2. + * + * Ensures: + * + *\li The current pointer in 'b' is advanced by 2. + * + * Returns: + * + *\li A 16-bit unsigned integer. + */ + +uint32_t +isc_buffer_getuint32(isc_buffer_t *b); +/*!< + * \brief Read an unsigned 32-bit integer in network byte order from 'b', + * convert it to host byte order, and return it. + * + * Requires: + * + *\li 'b' is a valid buffer. + * + *\li The length of the remaining region of 'b' is at least 4. + * + * Ensures: + * + *\li The current pointer in 'b' is advanced by 4. + * + * Returns: + * + *\li A 32-bit unsigned integer. + */ + +uint64_t +isc_buffer_getuint48(isc_buffer_t *b); +/*!< + * \brief Read an unsigned 48-bit integer in network byte order from 'b', + * convert it to host byte order, and return it. + * + * Requires: + * + *\li 'b' is a valid buffer. + * + *\li The length of the remaining region of 'b' is at least 6. + * + * Ensures: + * + *\li The current pointer in 'b' is advanced by 6. + * + * Returns: + * + *\li A 48-bit unsigned integer (stored in a 64-bit integer). + */ + +void +isc_buffer_putdecint(isc_buffer_t *b, int64_t v); +/*!< + * \brief Put decimal representation of 'v' in b + * + * Requires: + *\li 'b' is a valid buffer. + * + *\li The length of the available region of 'b' is at least strlen(dec('v')) + * or the buffer has autoreallocation enabled. + * + * Ensures: + *\li The used pointer in 'b' is advanced by strlen(dec('v')). + */ + +isc_result_t +isc_buffer_copyregion(isc_buffer_t *b, const isc_region_t *r); +/*!< + * \brief Copy the contents of 'r' into 'b'. + * + * Notes: + *\li If 'b' has autoreallocation enabled, and the length of 'r' is greater + * than the length of the available region of 'b', 'b' is reallocated. + * + * Requires: + *\li 'b' is a valid buffer. + * + *\li 'r' is a valid region. + * + * Returns: + *\li ISC_R_SUCCESS + *\li ISC_R_NOSPACE The available region of 'b' is not + * big enough. + */ + +isc_result_t +isc_buffer_dup(isc_mem_t *mctx, isc_buffer_t **dstp, const isc_buffer_t *src); +/*!< + * \brief Allocate 'dst' and copy used contents of 'src' into it. + * + * Requires: + *\li 'dstp' is not NULL and *dst is NULL. + *\li 'src' is a valid buffer. + * + * Returns: + *\li ISC_R_SUCCESS + */ + +isc_result_t +isc_buffer_printf(isc_buffer_t *b, const char *format, ...) + ISC_FORMAT_PRINTF(2, 3); +/*!< + * \brief Append a formatted string to the used region of 'b'. + * + * Notes: + * + *\li The 'format' argument is a printf(3) string, with additional arguments + * as necessary. + * + *\li If 'b' has autoreallocation enabled, and the length of the formatted + * string is greater than the length of the available region of 'b', 'b' + * is reallocated. + * + * Requires: + * + *\li 'b' is a valid buffer. + * + * Ensures: + * + *\li The used pointer in 'b' is advanced by the number of bytes appended + * (excluding the terminating NULL byte). + * + * Returns: + * + *\li #ISC_R_SUCCESS Operation succeeded. + *\li #ISC_R_NOSPACE 'b' does not allow reallocation and appending the + * formatted string to it would cause it to overflow. + *\li #ISC_R_NOMEMORY Reallocation failed. + *\li #ISC_R_FAILURE Other error occurred. + */ + +/* + * Buffer functions implemented as inline. + */ + +/*! \note + * XXXDCL Something more could be done with initializing buffers that + * point to const data. For example, isc_buffer_constinit() could + * set a new boolean flag in the buffer structure indicating whether + * the buffer was initialized with that function. Then if the + * boolean were true, the isc_buffer_put* functions could assert a + * contractual requirement for a non-const buffer. + * + * One drawback is that the isc_buffer_* functions that return + * pointers would still need to return non-const pointers to avoid compiler + * warnings, so it would be up to code that uses them to have to deal + * with the possibility that the buffer was initialized as const -- + * a problem that they *already* have to deal with but have absolutely + * no ability to. With a new isc_buffer_isconst() function returning + * true/false, they could at least assert a contractual requirement for + * non-const buffers when needed. + */ + +/*! + * \brief Make 'b' refer to the 'length'-byte region starting at 'base'. + * + * Requires: + * + *\li 'length' > 0 + * + *\li 'base' is a pointer to a sequence of 'length' bytes. + */ +static inline void +isc_buffer_init(isc_buffer_t *b, void *base, unsigned int length) { + ISC_REQUIRE(b != NULL); + + *b = (isc_buffer_t){ .base = base, + .length = length, + .magic = ISC_BUFFER_MAGIC }; + ISC_LINK_INIT(b, link); +} + +/*! + *\brief Initialize a buffer 'b' with a null data field and zero length. + * This can later be grown as needed and swapped in place. + */ +static inline void +isc_buffer_initnull(isc_buffer_t *b) { + *b = (isc_buffer_t){ .magic = ISC_BUFFER_MAGIC }; + ISC_LINK_INIT(b, link); +} + +/*! + * \brief Make 'b' refer to the 'length'-byte constant region starting + * at 'base'. + * + * Requires: + * + *\li 'length' > 0 + *\li 'base' is a pointer to a sequence of 'length' bytes. + */ +#define isc_buffer_constinit(_b, _d, _l) \ + do { \ + union { \ + void *_var; \ + const void *_const; \ + } _deconst; \ + _deconst._const = (_d); \ + isc_buffer_init((_b), _deconst._var, (_l)); \ + } while (0) + +/*! + * \brief Make 'b' an invalid buffer. + * + * Requires: + *\li 'b' is a valid buffer. + * + * Ensures: + *\li Future attempts to use 'b' without calling isc_buffer_init() on + * it will cause an assertion failure. + */ +static inline void +isc_buffer_invalidate(isc_buffer_t *b) { + ISC_REQUIRE(ISC_BUFFER_VALID(b)); + ISC_REQUIRE(!ISC_LINK_LINKED(b, link)); + ISC_REQUIRE(b->mctx == NULL); + + b->magic = 0; + b->base = NULL; + b->length = 0; + b->used = 0; + b->current = 0; + b->active = 0; +} + +/*! + * \brief Make 'r' refer to the region of 'b'. + * + * Requires: + * + *\li 'b' is a valid buffer. + * + *\li 'r' points to a region structure. + */ +static inline void +isc_buffer_region(isc_buffer_t *b, isc_region_t *r) { + ISC_REQUIRE(ISC_BUFFER_VALID(b)); + ISC_REQUIRE(r != NULL); + + r->base = b->base; + r->length = b->length; +} + +/*! + * \brief Make 'r' refer to the used region of 'b'. + * + * Requires: + * + *\li 'b' is a valid buffer. + * + *\li 'r' points to a region structure. + */ +static inline void +isc_buffer_usedregion(const isc_buffer_t *b, isc_region_t *r) { + ISC_REQUIRE(ISC_BUFFER_VALID(b)); + ISC_REQUIRE(r != NULL); + + r->base = b->base; + r->length = b->used; +} + +/*! + * \brief Make 'r' refer to the available region of 'b'. + * + * Requires: + * + *\li 'b' is a valid buffer. + * + *\li 'r' points to a region structure. + */ +static inline void +isc_buffer_availableregion(isc_buffer_t *b, isc_region_t *r) { + ISC_REQUIRE(ISC_BUFFER_VALID(b)); + ISC_REQUIRE(r != NULL); + + r->base = isc_buffer_used(b); + r->length = isc_buffer_availablelength(b); +} + +/*! + * \brief Increase the 'used' region of 'b' by 'n' bytes. + * + * Requires: + * + *\li 'b' is a valid buffer + * + *\li used + n <= length + */ +static inline void +isc_buffer_add(isc_buffer_t *b, unsigned int n) { + ISC_REQUIRE(ISC_BUFFER_VALID(b)); + ISC_REQUIRE(b->used + n <= b->length); + + b->used += n; +} + +/*! + * \brief Decrease the 'used' region of 'b' by 'n' bytes. + * + * Requires: + * + *\li 'b' is a valid buffer + * + *\li used >= n + */ +static inline void +isc_buffer_subtract(isc_buffer_t *b, unsigned int n) { + ISC_REQUIRE(ISC_BUFFER_VALID(b)); + ISC_REQUIRE(b->used >= n); + + b->used -= n; + if (b->current > b->used) { + b->current = b->used; + } + if (b->active > b->used) { + b->active = b->used; + } +} + +/*!< + * \brief Make the used region empty. + * + * Requires: + * + *\li 'b' is a valid buffer + * + * Ensures: + * + *\li used = 0 + */ +static inline void +isc_buffer_clear(isc_buffer_t *b) { + ISC_REQUIRE(ISC_BUFFER_VALID(b)); + + b->used = 0; + b->current = 0; + b->active = 0; +} + +/*! + * \brief Make 'r' refer to the consumed region of 'b'. + * + * Requires: + * + *\li 'b' is a valid buffer. + * + *\li 'r' points to a region structure. + */ +static inline void +isc_buffer_consumedregion(isc_buffer_t *b, isc_region_t *r) { + ISC_REQUIRE(ISC_BUFFER_VALID(b)); + ISC_REQUIRE(r != NULL); + + r->base = b->base; + r->length = b->current; +} + +/*! + * \brief Make 'r' refer to the remaining region of 'b'. + * + * Requires: + * + *\li 'b' is a valid buffer. + * + *\li 'r' points to a region structure. + */ +static inline void +isc_buffer_remainingregion(isc_buffer_t *b, isc_region_t *r) { + ISC_REQUIRE(ISC_BUFFER_VALID(b)); + ISC_REQUIRE(r != NULL); + + r->base = isc_buffer_current(b); + r->length = isc_buffer_remaininglength(b); +} + +/*! + * \brief Make 'r' refer to the active region of 'b'. + * + * Requires: + * + *\li 'b' is a valid buffer. + * + *\li 'r' points to a region structure. + */ +static inline void +isc_buffer_activeregion(isc_buffer_t *b, isc_region_t *r) { + ISC_REQUIRE(ISC_BUFFER_VALID(b)); + ISC_REQUIRE(r != NULL); + + if (b->current < b->active) { + r->base = isc_buffer_current(b); + r->length = isc_buffer_activelength(b); + } else { + r->base = NULL; + r->length = 0; + } +} + +/*! + * \brief Sets the end of the active region 'n' bytes after current. + * + * Requires: + * + *\li 'b' is a valid buffer. + * + *\li current + n <= used + */ +static inline void +isc_buffer_setactive(isc_buffer_t *b, unsigned int n) { + ISC_REQUIRE(ISC_BUFFER_VALID(b)); + ISC_REQUIRE(b->current + n <= b->used); + + b->active = b->current + n; +} + +/*!< + * \brief Make the consumed region empty. + * + * Requires: + * + *\li 'b' is a valid buffer + * + * Ensures: + * + *\li current == 0 + */ +static inline void +isc_buffer_first(isc_buffer_t *b) { + ISC_REQUIRE(ISC_BUFFER_VALID(b)); + + b->current = 0; +} + +/*! + * \brief Increase the 'consumed' region of 'b' by 'n' bytes. + * + * Requires: + * + *\li 'b' is a valid buffer + * + *\li current + n <= used + */ +static inline void +isc_buffer_forward(isc_buffer_t *b, unsigned int n) { + ISC_REQUIRE(ISC_BUFFER_VALID(b)); + ISC_REQUIRE(b->current + n <= b->used); + + b->current += n; +} + +/*! + * \brief Decrease the 'consumed' region of 'b' by 'n' bytes. + * + * Requires: + * + *\li 'b' is a valid buffer + * + *\li n <= current + */ +static inline void +isc_buffer_back(isc_buffer_t *b, unsigned int n) { + ISC_REQUIRE(ISC_BUFFER_VALID(b)); + ISC_REQUIRE(n <= b->current); + + b->current -= n; +} + +/*! + * \brief Store an unsigned 8-bit integer from 'val' into 'b'. + * + * Requires: + *\li 'b' is a valid buffer. + * + *\li The length of the available region of 'b' is at least 1 + * or the buffer has autoreallocation enabled. + * + * Ensures: + *\li The used pointer in 'b' is advanced by 1. + */ +static inline void +isc_buffer_putuint8(isc_buffer_t *b, uint8_t val) { + unsigned char *cp; + + ISC_REQUIRE(ISC_BUFFER_VALID(b)); + + if (b->autore) { + isc_buffer_t *tmp = b; + ISC_REQUIRE(isc_buffer_reserve(&tmp, 1) == ISC_R_SUCCESS); + } + + ISC_REQUIRE(isc_buffer_availablelength(b) >= 1U); + + cp = isc_buffer_used(b); + b->used++; + cp[0] = val; +} + +/*! + * \brief Store an unsigned 16-bit integer in host byte order from 'val' + * into 'b' in network byte order. + * + * Requires: + *\li 'b' is a valid buffer. + * + *\li The length of the available region of 'b' is at least 2 + * or the buffer has autoreallocation enabled. + * + * Ensures: + *\li The used pointer in 'b' is advanced by 2. + */ +static inline void +isc_buffer_putuint16(isc_buffer_t *b, uint16_t val) { + unsigned char *cp; + + ISC_REQUIRE(ISC_BUFFER_VALID(b)); + + if (b->autore) { + isc_buffer_t *tmp = b; + ISC_REQUIRE(isc_buffer_reserve(&tmp, 2) == ISC_R_SUCCESS); + } + + ISC_REQUIRE(isc_buffer_availablelength(b) >= 2U); + + cp = isc_buffer_used(b); + b->used += 2; + cp[0] = (unsigned char)(val >> 8); + cp[1] = (unsigned char)val; +} + +/*! + * Store an unsigned 24-bit integer in host byte order from 'val' + * into 'b' in network byte order. + * + * Requires: + *\li 'b' is a valid buffer. + * + *\li The length of the available region of 'b' is at least 3 + * or the buffer has autoreallocation enabled. + * + * Ensures: + *\li The used pointer in 'b' is advanced by 3. + */ +static inline void +isc_buffer_putuint24(isc_buffer_t *b, uint32_t val) { + unsigned char *cp; + + ISC_REQUIRE(ISC_BUFFER_VALID(b)); + + if (b->autore) { + isc_buffer_t *tmp = b; + ISC_REQUIRE(isc_buffer_reserve(&tmp, 3) == ISC_R_SUCCESS); + } + + ISC_REQUIRE(isc_buffer_availablelength(b) >= 3U); + + cp = isc_buffer_used(b); + b->used += 3; + cp[0] = (unsigned char)(val >> 16); + cp[1] = (unsigned char)(val >> 8); + cp[2] = (unsigned char)val; +} + +/*! + * \brief Store an unsigned 32-bit integer in host byte order from 'val' + * into 'b' in network byte order. + * + * Requires: + *\li 'b' is a valid buffer. + * + *\li The length of the available region of 'b' is at least 4 + * or the buffer has autoreallocation enabled. + * + * Ensures: + *\li The used pointer in 'b' is advanced by 4. + */ +static inline void +isc_buffer_putuint32(isc_buffer_t *b, uint32_t val) { + unsigned char *cp; + + ISC_REQUIRE(ISC_BUFFER_VALID(b)); + + if (b->autore) { + isc_buffer_t *tmp = b; + ISC_REQUIRE(isc_buffer_reserve(&tmp, 4) == ISC_R_SUCCESS); + } + + ISC_REQUIRE(isc_buffer_availablelength(b) >= 4U); + + cp = isc_buffer_used(b); + b->used += 4; + cp[0] = (unsigned char)(val >> 24); + cp[1] = (unsigned char)(val >> 16); + cp[2] = (unsigned char)(val >> 8); + cp[3] = (unsigned char)val; +} + +/*! + * \brief Store an unsigned 48-bit integer in host byte order from 'val' + * into 'b' in network byte order. + * + * Requires: + *\li 'b' is a valid buffer. + * + *\li The length of the available region of 'b' is at least 6 + * or the buffer has autoreallocation enabled. + * + * Ensures: + *\li The used pointer in 'b' is advanced by 6. + */ +static inline void +isc_buffer_putuint48(isc_buffer_t *b, uint64_t val) { + unsigned char *cp = NULL; + + ISC_REQUIRE(ISC_BUFFER_VALID(b)); + + if (b->autore) { + isc_buffer_t *tmp = b; + ISC_REQUIRE(isc_buffer_reserve(&tmp, 6) == ISC_R_SUCCESS); + } + + ISC_REQUIRE(isc_buffer_availablelength(b) >= 6U); + + cp = isc_buffer_used(b); + b->used += 6; + cp[0] = (unsigned char)(val >> 40); + cp[1] = (unsigned char)(val >> 32); + cp[2] = (unsigned char)(val >> 24); + cp[3] = (unsigned char)(val >> 16); + cp[4] = (unsigned char)(val >> 8); + cp[5] = (unsigned char)val; +} + +/*! + * \brief Copy 'length' bytes of memory at 'base' into 'b'. + * + * Requires: + *\li 'b' is a valid buffer. + * + *\li 'base' points to 'length' bytes of valid memory. + * + *\li The length of the available region of 'b' is at least 'length' + * or the buffer has autoreallocation enabled. + * + * Ensures: + *\li The used pointer in 'b' is advanced by 'length'. + */ +static inline void +isc_buffer_putmem(isc_buffer_t *b, const unsigned char *base, + unsigned int length) { + ISC_REQUIRE(ISC_BUFFER_VALID(b)); + + if (b->autore) { + isc_buffer_t *tmp = b; + ISC_REQUIRE(isc_buffer_reserve(&tmp, length) == ISC_R_SUCCESS); + } + + ISC_REQUIRE(isc_buffer_availablelength(b) >= (unsigned int)length); + + if (length > 0U) { + memmove(isc_buffer_used(b), base, length); + b->used += length; + } +} + +/*! + * \brief Copy 'source' into 'b', not including terminating NUL. + * + * Requires: + *\li 'b' is a valid buffer. + * + *\li 'source' is a valid NULL terminated string. + * + *\li The length of the available region of 'b' is at least strlen('source') + * or the buffer has autoreallocation enabled. + * + * Ensures: + *\li The used pointer in 'b' is advanced by strlen('source'). + */ +static inline void +isc_buffer_putstr(isc_buffer_t *b, const char *source) { + unsigned int length; + unsigned char *cp; + + ISC_REQUIRE(ISC_BUFFER_VALID(b)); + ISC_REQUIRE(source != NULL); + + length = (unsigned int)strlen(source); + if (b->autore) { + isc_buffer_t *tmp = b; + ISC_REQUIRE(isc_buffer_reserve(&tmp, length) == ISC_R_SUCCESS); + } + + ISC_REQUIRE(isc_buffer_availablelength(b) >= length); + + cp = isc_buffer_used(b); + memmove(cp, source, length); + b->used += length; +} +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/cmocka.h b/lib/isc/include/isc/cmocka.h new file mode 100644 index 0000000..de86d5a --- /dev/null +++ b/lib/isc/include/isc/cmocka.h @@ -0,0 +1,55 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +/*! \file isc/cmocka.h */ + +#pragma once + +#include <cmocka.h> + +#include <isc/lang.h> + +ISC_LANG_BEGINDECLS + +/* + * Copy the test identified by 'name' from 'tests' to 'selected'. + */ +#define cmocka_add_test_byname(tests, name, selected) \ + _cmocka_add_test_byname(tests, sizeof(tests) / sizeof(tests[0]), name, \ + selected, \ + sizeof(selected) / sizeof(selected[0])) + +static inline bool +_cmocka_add_test_byname(const struct CMUnitTest *tests, size_t ntests, + const char *name, struct CMUnitTest *selected, + size_t nselected) { + size_t i, j; + + for (i = 0; i < ntests && tests[i].name != NULL; i++) { + if (strcmp(tests[i].name, name) != 0) { + continue; + } + for (j = 0; j < nselected && selected[j].name != NULL; j++) { + if (strcmp(tests[j].name, name) == 0) { + break; + } + } + if (j < nselected && selected[j].name == NULL) { + selected[j] = tests[i]; + } + return (true); + } + return (false); +} + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/commandline.h b/lib/isc/include/isc/commandline.h new file mode 100644 index 0000000..ac72135 --- /dev/null +++ b/lib/isc/include/isc/commandline.h @@ -0,0 +1,56 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/commandline.h */ + +#include <stdbool.h> + +#include <isc/lang.h> +#include <isc/result.h> +#include <isc/types.h> + +/*% Index into parent argv vector. */ +extern int isc_commandline_index; +/*% Character checked for validity. */ +extern int isc_commandline_option; +/*% Argument associated with option. */ +extern char *isc_commandline_argument; +/*% For printing error messages. */ +extern char *isc_commandline_progname; +/*% Print error message. */ +extern bool isc_commandline_errprint; +/*% Reset getopt. */ +extern bool isc_commandline_reset; + +ISC_LANG_BEGINDECLS + +int +isc_commandline_parse(int argc, char *const *argv, const char *options); +/*%< + * Parse a command line (similar to getopt()) + */ + +isc_result_t +isc_commandline_strtoargv(isc_mem_t *mctx, char *s, unsigned int *argcp, + char ***argvp, unsigned int n); +/*%< + * Tokenize the string "s" into whitespace-separated words, + * returning the number of words in '*argcp' and an array + * of pointers to the words in '*argvp'. The caller + * must free the array using isc_mem_free(). The string + * is modified in-place. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/condition.h b/lib/isc/include/isc/condition.h new file mode 100644 index 0000000..0e1dcf1 --- /dev/null +++ b/lib/isc/include/isc/condition.h @@ -0,0 +1,53 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file */ + +#include <errno.h> + +#include <isc/error.h> +#include <isc/lang.h> +#include <isc/mutex.h> +#include <isc/result.h> +#include <isc/strerr.h> +#include <isc/string.h> +#include <isc/types.h> + +typedef pthread_cond_t isc_condition_t; + +#define isc_condition_init(cond) \ + if (pthread_cond_init(cond, NULL) != 0) { \ + FATAL_SYSERROR(errno, "pthread_cond_init()"); \ + } + +#define isc_condition_wait(cp, mp) \ + ((pthread_cond_wait((cp), (mp)) == 0) ? ISC_R_SUCCESS \ + : ISC_R_UNEXPECTED) + +#define isc_condition_signal(cp) \ + ((pthread_cond_signal((cp)) == 0) ? ISC_R_SUCCESS : ISC_R_UNEXPECTED) + +#define isc_condition_broadcast(cp) \ + ((pthread_cond_broadcast((cp)) == 0) ? ISC_R_SUCCESS : ISC_R_UNEXPECTED) + +#define isc_condition_destroy(cp) \ + ((pthread_cond_destroy((cp)) == 0) ? ISC_R_SUCCESS : ISC_R_UNEXPECTED) + +ISC_LANG_BEGINDECLS + +isc_result_t +isc_condition_waituntil(isc_condition_t *, isc_mutex_t *, isc_time_t *); + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/counter.h b/lib/isc/include/isc/counter.h new file mode 100644 index 0000000..820e4a2 --- /dev/null +++ b/lib/isc/include/isc/counter.h @@ -0,0 +1,84 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/***** +***** Module Info +*****/ + +/*! \file isc/counter.h + * + * \brief The isc_counter_t object is a simplified version of the + * isc_quota_t object; it tracks the consumption of limited + * resources, returning an error condition when the quota is + * exceeded. However, unlike isc_quota_t, attaching and detaching + * from a counter object does not increment or decrement the counter. + */ + +/*** + *** Imports. + ***/ + +#include <isc/lang.h> +#include <isc/mutex.h> +#include <isc/types.h> + +/***** +***** Types. +*****/ + +ISC_LANG_BEGINDECLS + +isc_result_t +isc_counter_create(isc_mem_t *mctx, int limit, isc_counter_t **counterp); +/*%< + * Allocate and initialize a counter object. + */ + +isc_result_t +isc_counter_increment(isc_counter_t *counter); +/*%< + * Increment the counter. + * + * If the counter limit is nonzero and has been reached, then + * return ISC_R_QUOTA, otherwise ISC_R_SUCCESS. (The counter is + * incremented regardless of return value.) + */ + +unsigned int +isc_counter_used(isc_counter_t *counter); +/*%< + * Return the current counter value. + */ + +void +isc_counter_setlimit(isc_counter_t *counter, int limit); +/*%< + * Set the counter limit. + */ + +void +isc_counter_attach(isc_counter_t *source, isc_counter_t **targetp); +/*%< + * Attach to a counter object, increasing its reference counter. + */ + +void +isc_counter_detach(isc_counter_t **counterp); +/*%< + * Detach (and destroy if reference counter has dropped to zero) + * a counter object. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/crc64.h b/lib/isc/include/isc/crc64.h new file mode 100644 index 0000000..4147672 --- /dev/null +++ b/lib/isc/include/isc/crc64.h @@ -0,0 +1,55 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/crc64.h + * \brief CRC64 in C + */ + +#include <inttypes.h> + +#include <isc/lang.h> +#include <isc/types.h> + +ISC_LANG_BEGINDECLS + +void +isc_crc64_init(uint64_t *crc); +/*% + * Initialize a new CRC. + * + * Requires: + * * 'crc' is not NULL. + */ + +void +isc_crc64_update(uint64_t *crc, const void *data, size_t len); +/*% + * Add data to the CRC. + * + * Requires: + * * 'crc' is not NULL. + * * 'data' is not NULL. + */ + +void +isc_crc64_final(uint64_t *crc); +/*% + * Finalize the CRC. + * + * Requires: + * * 'crc' is not NULL. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/deprecated.h b/lib/isc/include/isc/deprecated.h new file mode 100644 index 0000000..c83508d --- /dev/null +++ b/lib/isc/include/isc/deprecated.h @@ -0,0 +1,20 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#if (__GNUC__ + 0) > 3 +#define ISC_DEPRECATED __attribute__((deprecated)) +#else /* if (__GNUC__ + 0) > 3 */ +#define ISC_DEPRECATED /* none */ +#endif /* __GNUC__ > 3*/ diff --git a/lib/isc/include/isc/dir.h b/lib/isc/include/isc/dir.h new file mode 100644 index 0000000..c1ff2c7 --- /dev/null +++ b/lib/isc/include/isc/dir.h @@ -0,0 +1,80 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file */ + +#include <dirent.h> +#include <limits.h> + +#include <isc/lang.h> +#include <isc/result.h> + +#include <sys/types.h> /* Required on some systems. */ + +#ifndef NAME_MAX +#define NAME_MAX 256 +#endif + +#ifndef PATH_MAX +#define PATH_MAX 1024 +#endif + +/*% Directory Entry */ +typedef struct isc_direntry { + char name[NAME_MAX]; + unsigned int length; +} isc_direntry_t; + +/*% Directory */ +typedef struct isc_dir { + unsigned int magic; + char dirname[PATH_MAX]; + isc_direntry_t entry; + DIR *handle; +} isc_dir_t; + +ISC_LANG_BEGINDECLS + +void +isc_dir_init(isc_dir_t *dir); + +isc_result_t +isc_dir_open(isc_dir_t *dir, const char *dirname); + +isc_result_t +isc_dir_read(isc_dir_t *dir); + +isc_result_t +isc_dir_reset(isc_dir_t *dir); + +void +isc_dir_close(isc_dir_t *dir); + +isc_result_t +isc_dir_chdir(const char *dirname); + +isc_result_t +isc_dir_chroot(const char *dirname); + +isc_result_t +isc_dir_createunique(char *templet); +/*!< + * Use a templet (such as from isc_file_mktemplate()) to create a uniquely + * named, empty directory. The templet string is modified in place. + * If result == ISC_R_SUCCESS, it is the name of the directory that was + * created. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/endian.h b/lib/isc/include/isc/endian.h new file mode 100644 index 0000000..be91b1d --- /dev/null +++ b/lib/isc/include/isc/endian.h @@ -0,0 +1,166 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#if defined(__DragonFly__) || defined(__FreeBSD__) || defined(__NetBSD__) || \ + defined(__OpenBSD__) || defined(__bsdi__) + +#include <sys/endian.h> + +/* + * Recent BSDs should have [bl]e{16,32,64}toh() defined in <sys/endian.h>. + * Older ones might not, but these should have the alternatively named + * [bl]etoh{16,32,64}() functions defined. + */ +#ifndef be16toh +#define be16toh(x) betoh16(x) +#define le16toh(x) letoh16(x) +#define be32toh(x) betoh32(x) +#define le32toh(x) letoh32(x) +#define be64toh(x) betoh64(x) +#define le64toh(x) letoh64(x) +#endif /* !be16toh */ + +#elif defined __APPLE__ + +/* + * macOS has its own byte-swapping routines, so use these. + */ + +#include <libkern/OSByteOrder.h> + +#define htobe16(x) OSSwapHostToBigInt16(x) +#define htole16(x) OSSwapHostToLittleInt16(x) +#define be16toh(x) OSSwapBigToHostInt16(x) +#define le16toh(x) OSSwapLittleToHostInt16(x) + +#define htobe32(x) OSSwapHostToBigInt32(x) +#define htole32(x) OSSwapHostToLittleInt32(x) +#define be32toh(x) OSSwapBigToHostInt32(x) +#define le32toh(x) OSSwapLittleToHostInt32(x) + +#define htobe64(x) OSSwapHostToBigInt64(x) +#define htole64(x) OSSwapHostToLittleInt64(x) +#define be64toh(x) OSSwapBigToHostInt64(x) +#define le64toh(x) OSSwapLittleToHostInt64(x) + +#elif defined(sun) || defined(__sun) || defined(__SVR4) + +/* + * For Solaris, rely on the fallback definitions below, though use + * Solaris-specific versions of bswap_{16,32,64}(). + */ + +#include <sys/byteorder.h> + +#define bswap_16(x) BSWAP_16(x) +#define bswap_32(x) BSWAP_32(x) +#define bswap_64(x) BSWAP_64(x) + +#elif defined(__ANDROID__) || defined(__CYGWIN__) || defined(__GNUC__) || \ + defined(__GNU__) + +#include <byteswap.h> +#include <endian.h> + +#else /* if defined(__DragonFly__) || defined(__FreeBSD__) || \ + * defined(__NetBSD__) || defined(__OpenBSD__) || defined(__bsdi__) */ + +#endif /* Specific platform support */ + +/* + * Fallback definitions. + */ + +#include <inttypes.h> + +#ifndef bswap_16 +#define bswap_16(x) \ + ((uint16_t)((((uint16_t)(x)&0xff00) >> 8) | \ + (((uint16_t)(x)&0x00ff) << 8))) +#endif /* !bswap_16 */ + +#ifndef bswap_32 +#define bswap_32(x) \ + ((uint32_t)((((uint32_t)(x)&0xff000000) >> 24) | \ + (((uint32_t)(x)&0x00ff0000) >> 8) | \ + (((uint32_t)(x)&0x0000ff00) << 8) | \ + (((uint32_t)(x)&0x000000ff) << 24))) +#endif /* !bswap_32 */ + +#ifndef bswap_64 +#define bswap_64(x) \ + ((uint64_t)((((uint64_t)(x)&0xff00000000000000ULL) >> 56) | \ + (((uint64_t)(x)&0x00ff000000000000ULL) >> 40) | \ + (((uint64_t)(x)&0x0000ff0000000000ULL) >> 24) | \ + (((uint64_t)(x)&0x000000ff00000000ULL) >> 8) | \ + (((uint64_t)(x)&0x00000000ff000000ULL) << 8) | \ + (((uint64_t)(x)&0x0000000000ff0000ULL) << 24) | \ + (((uint64_t)(x)&0x000000000000ff00ULL) << 40) | \ + (((uint64_t)(x)&0x00000000000000ffULL) << 56))) +#endif /* !bswap_64 */ + +#ifndef htobe16 +#if WORDS_BIGENDIAN + +#define htobe16(x) (x) +#define htole16(x) bswap_16(x) +#define be16toh(x) (x) +#define le16toh(x) bswap_16(x) + +#else /* WORDS_BIGENDIAN */ + +#define htobe16(x) bswap_16(x) +#define htole16(x) (x) +#define be16toh(x) bswap_16(x) +#define le16toh(x) (x) + +#endif /* WORDS_BIGENDIAN */ +#endif /* !htobe16 */ + +#ifndef htobe32 +#if WORDS_BIGENDIAN + +#define htobe32(x) (x) +#define htole32(x) bswap_32(x) +#define be32toh(x) (x) +#define le32toh(x) bswap_32(x) + +#else /* WORDS_BIGENDIAN */ + +#define htobe32(x) bswap_32(x) +#define htole32(x) (x) +#define be32toh(x) bswap_32(x) +#define le32toh(x) (x) + +#endif /* WORDS_BIGENDIAN */ +#endif /* !htobe32 */ + +#ifndef htobe64 +#if WORDS_BIGENDIAN + +#define htobe64(x) (x) +#define htole64(x) bswap_64(x) +#define be64toh(x) (x) +#define le64toh(x) bswap_64(x) + +#else /* WORDS_BIGENDIAN */ + +#define htobe64(x) bswap_64(x) +#define htole64(x) (x) +#define be64toh(x) bswap_64(x) +#define le64toh(x) (x) + +#endif /* WORDS_BIGENDIAN */ +#endif /* !htobe64 */ diff --git a/lib/isc/include/isc/errno.h b/lib/isc/include/isc/errno.h new file mode 100644 index 0000000..0151df3 --- /dev/null +++ b/lib/isc/include/isc/errno.h @@ -0,0 +1,27 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/file.h */ + +#include <isc/types.h> + +ISC_LANG_BEGINDECLS + +isc_result_t +isc_errno_toresult(int err); +/*!< + * \brief Convert a POSIX errno value to an ISC result code. + */ +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/error.h b/lib/isc/include/isc/error.h new file mode 100644 index 0000000..f4f6682 --- /dev/null +++ b/lib/isc/include/isc/error.h @@ -0,0 +1,45 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/error.h */ + +#include <stdarg.h> + +#include <isc/attributes.h> +#include <isc/formatcheck.h> +#include <isc/lang.h> + +ISC_LANG_BEGINDECLS + +typedef void (*isc_errorcallback_t)(const char *, int, const char *, + const char *, va_list); + +/*% set unexpected error */ +void isc_error_setunexpected(isc_errorcallback_t); + +/*% set fatal error */ +void isc_error_setfatal(isc_errorcallback_t); + +/*% unexpected error */ +void +isc_error_unexpected(const char *, int, const char *, const char *, ...) + ISC_FORMAT_PRINTF(4, 5); + +/*% fatal error */ +noreturn void +isc_error_fatal(const char *, int, const char *, const char *, ...) + ISC_FORMAT_PRINTF(4, 5); + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/event.h b/lib/isc/include/isc/event.h new file mode 100644 index 0000000..811bcd8 --- /dev/null +++ b/lib/isc/include/isc/event.h @@ -0,0 +1,117 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/event.h */ + +#include <isc/lang.h> +#include <isc/types.h> + +/***** +***** Events. +*****/ + +typedef void (*isc_eventdestructor_t)(isc_event_t *); + +#define ISC_EVENT_COMMON(ltype) \ + size_t ev_size; \ + unsigned int ev_attributes; \ + void *ev_tag; \ + isc_eventtype_t ev_type; \ + isc_taskaction_t ev_action; \ + void *ev_arg; \ + void *ev_sender; \ + isc_eventdestructor_t ev_destroy; \ + void *ev_destroy_arg; \ + ISC_LINK(ltype) ev_link; \ + ISC_LINK(ltype) ev_ratelink + +/*% + * Attributes matching a mask of 0x000000ff are reserved for the task library's + * definition. Attributes of 0xffffff00 may be used by the application + * or non-ISC libraries. + */ +#define ISC_EVENTATTR_NOPURGE 0x00000001 + +/*% + * The ISC_EVENTATTR_CANCELED attribute is intended to indicate + * that an event is delivered as a result of a canceled operation + * rather than successful completion, by mutual agreement + * between the sender and receiver. It is not set or used by + * the task system. + */ +#define ISC_EVENTATTR_CANCELED 0x00000002 + +#define ISC_EVENT_INIT(event, sz, at, ta, ty, ac, ar, sn, df, da) \ + do { \ + (event)->ev_size = (sz); \ + (event)->ev_attributes = (at); \ + (event)->ev_tag = (ta); \ + (event)->ev_type = (ty); \ + (event)->ev_action = (ac); \ + (event)->ev_arg = (ar); \ + (event)->ev_sender = (sn); \ + (event)->ev_destroy = (df); \ + (event)->ev_destroy_arg = (da); \ + ISC_LINK_INIT((event), ev_link); \ + ISC_LINK_INIT((event), ev_ratelink); \ + } while (0) + +/*% + * This structure is public because "subclassing" it may be useful when + * defining new event types. + */ +struct isc_event { + ISC_EVENT_COMMON(struct isc_event); +}; + +#define ISC_EVENTTYPE_FIRSTEVENT 0x00000000 +#define ISC_EVENTTYPE_LASTEVENT 0xffffffff + +#define ISC_EVENT_PTR(p) ((isc_event_t **)(void *)(p)) + +ISC_LANG_BEGINDECLS + +isc_event_t * +isc_event_allocate(isc_mem_t *mctx, void *sender, isc_eventtype_t type, + isc_taskaction_t action, void *arg, size_t size); +isc_event_t * +isc_event_constallocate(isc_mem_t *mctx, void *sender, isc_eventtype_t type, + isc_taskaction_t action, const void *arg, size_t size); +/*%< + * Allocate an event structure. + * + * Allocate and initialize in a structure with initial elements + * defined by: + * + * \code + * struct { + * ISC_EVENT_COMMON(struct isc_event); + * ... + * }; + * \endcode + * + * Requires: + *\li 'size' >= sizeof(struct isc_event) + *\li 'action' to be non NULL + * + * Returns: + *\li a pointer to a initialized structure of the requested size. + *\li NULL if unable to allocate memory. + */ + +void +isc_event_free(isc_event_t **); + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/eventclass.h b/lib/isc/include/isc/eventclass.h new file mode 100644 index 0000000..b8be2ff --- /dev/null +++ b/lib/isc/include/isc/eventclass.h @@ -0,0 +1,45 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/eventclass.h + ***** Registry of Predefined Event Type Classes + *****/ + +/*% + * An event class is an unsigned 16 bit number. Each class may contain up + * to 65536 events. An event type is formed by adding the event number + * within the class to the class number. + * + */ + +#define ISC_EVENTCLASS(eclass) ((eclass) << 16) + +/*@{*/ +/*! + * Classes < 1024 are reserved for ISC use. + * Event classes >= 1024 and <= 65535 are reserved for application use. + */ + +#define ISC_EVENTCLASS_TASK ISC_EVENTCLASS(0) +#define ISC_EVENTCLASS_TIMER ISC_EVENTCLASS(1) +#define ISC_EVENTCLASS_SOCKET ISC_EVENTCLASS(2) +#define ISC_EVENTCLASS_FILE ISC_EVENTCLASS(3) +#define ISC_EVENTCLASS_DNS ISC_EVENTCLASS(4) +#define ISC_EVENTCLASS_APP ISC_EVENTCLASS(5) +#define ISC_EVENTCLASS_OMAPI ISC_EVENTCLASS(6) +#define ISC_EVENTCLASS_RATELIMITER ISC_EVENTCLASS(7) +#define ISC_EVENTCLASS_ISCCC ISC_EVENTCLASS(8) +#define ISC_EVENTCLASS_NS ISC_EVENTCLASS(9) +/*@}*/ diff --git a/lib/isc/include/isc/file.h b/lib/isc/include/isc/file.h new file mode 100644 index 0000000..f78c5c5 --- /dev/null +++ b/lib/isc/include/isc/file.h @@ -0,0 +1,381 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/file.h */ + +#include <stdbool.h> +#include <stdio.h> + +#include <isc/lang.h> +#include <isc/stat.h> +#include <isc/types.h> + +ISC_LANG_BEGINDECLS + +isc_result_t +isc_file_settime(const char *file, isc_time_t *time); + +isc_result_t +isc_file_mode(const char *file, mode_t *modep); + +isc_result_t +isc_file_getmodtime(const char *file, isc_time_t *time); +/*!< + * \brief Get the time of last modification of a file. + * + * Notes: + *\li The time that is set is relative to the (OS-specific) epoch, as are + * all isc_time_t structures. + * + * Requires: + *\li file != NULL. + *\li time != NULL. + * + * Ensures: + *\li If the file could not be accessed, 'time' is unchanged. + * + * Returns: + *\li #ISC_R_SUCCESS + * Success. + *\li #ISC_R_NOTFOUND + * No such file exists. + *\li #ISC_R_INVALIDFILE + * The path specified was not usable by the operating system. + *\li #ISC_R_NOPERM + * The file's metainformation could not be retrieved because + * permission was denied to some part of the file's path. + *\li #ISC_R_IOERROR + * Hardware error interacting with the filesystem. + *\li #ISC_R_UNEXPECTED + * Something totally unexpected happened. + * + */ + +isc_result_t +isc_file_mktemplate(const char *path, char *buf, size_t buflen); +/*!< + * \brief Generate a template string suitable for use with + * isc_file_openunique(). + * + * Notes: + *\li This function is intended to make creating temporary files + * portable between different operating systems. + * + *\li The path is prepended to an implementation-defined string and + * placed into buf. The string has no path characters in it, + * and its maximum length is 14 characters plus a NUL. Thus + * buflen should be at least strlen(path) + 15 characters or + * an error will be returned. + * + * Requires: + *\li buf != NULL. + * + * Ensures: + *\li If result == #ISC_R_SUCCESS: + * buf contains a string suitable for use as the template argument + * to isc_file_openunique(). + * + *\li If result != #ISC_R_SUCCESS: + * buf is unchanged. + * + * Returns: + *\li #ISC_R_SUCCESS Success. + *\li #ISC_R_NOSPACE buflen indicates buf is too small for the catenation + * of the path with the internal template string. + */ + +isc_result_t +isc_file_openunique(char *templet, FILE **fp); +isc_result_t +isc_file_openuniqueprivate(char *templet, FILE **fp); +isc_result_t +isc_file_openuniquemode(char *templet, int mode, FILE **fp); +isc_result_t +isc_file_bopenunique(char *templet, FILE **fp); +isc_result_t +isc_file_bopenuniqueprivate(char *templet, FILE **fp); +isc_result_t +isc_file_bopenuniquemode(char *templet, int mode, FILE **fp); +/*!< + * \brief Create and open a file with a unique name based on 'templet'. + * isc_file_bopen*() open the file in binary mode in Windows. + * isc_file_open*() open the file in text mode in Windows. + * + * Notes: + *\li 'template' is a reserved work in C++. If you want to complain + * about the spelling of 'templet', first look it up in the + * Merriam-Webster English dictionary. (http://www.m-w.com/) + * + *\li This function works by using the template to generate file names. + * The template must be a writable string, as it is modified in place. + * Trailing X characters in the file name (full file name on Unix, + * basename on Win32 -- eg, tmp-XXXXXX vs XXXXXX.tmp, respectively) + * are replaced with ASCII characters until a non-existent filename + * is found. If the template does not include pathname information, + * the files in the working directory of the program are searched. + * + *\li isc_file_mktemplate is a good, portable way to get a template. + * + * Requires: + *\li 'fp' is non-NULL and '*fp' is NULL. + * + *\li 'template' is non-NULL, and of a form suitable for use by + * the system as described above. + * + * Ensures: + *\li If result is #ISC_R_SUCCESS: + * *fp points to an stream opening in stdio's "w+" mode. + * + *\li If result is not #ISC_R_SUCCESS: + * *fp is NULL. + * + * No file is open. Even if one was created (but unable + * to be reopened as a stdio FILE pointer) then it has been + * removed. + * + *\li This function does *not* ensure that the template string has not been + * modified, even if the operation was unsuccessful. + * + * Returns: + *\li #ISC_R_SUCCESS + * Success. + *\li #ISC_R_EXISTS + * No file with a unique name could be created based on the + * template. + *\li #ISC_R_INVALIDFILE + * The path specified was not usable by the operating system. + *\li #ISC_R_NOPERM + * The file could not be created because permission was denied + * to some part of the file's path. + *\li #ISC_R_IOERROR + * Hardware error interacting with the filesystem. + *\li #ISC_R_UNEXPECTED + * Something totally unexpected happened. + */ + +isc_result_t +isc_file_remove(const char *filename); +/*!< + * \brief Remove the file named by 'filename'. + */ + +isc_result_t +isc_file_rename(const char *oldname, const char *newname); +/*!< + * \brief Rename the file 'oldname' to 'newname'. + */ + +bool +isc_file_exists(const char *pathname); +/*!< + * \brief Return #true if the calling process can tell that the given file + * exists. Will not return true if the calling process has insufficient + * privileges to search the entire path. + */ + +bool +isc_file_isabsolute(const char *filename); +/*!< + * \brief Return #true if the given file name is absolute. + */ + +isc_result_t +isc_file_isplainfile(const char *name); + +isc_result_t +isc_file_isplainfilefd(int fd); +/*!< + * \brief Check that the file is a plain file + * + * Returns: + *\li #ISC_R_SUCCESS + * Success. The file is a plain file. + *\li #ISC_R_INVALIDFILE + * The path specified was not usable by the operating system. + *\li #ISC_R_FILENOTFOUND + * The file does not exist. This return code comes from + * errno=ENOENT when stat returns -1. This code is mentioned + * here, because in logconf.c, it is the one rcode that is + * permitted in addition to ISC_R_SUCCESS. This is done since + * the next call in logconf.c is to isc_stdio_open(), which + * will create the file if it can. + *\li other ISC_R_* errors translated from errno + * These occur when stat returns -1 and an errno. + */ + +isc_result_t +isc_file_isdirectory(const char *name); +/*!< + * \brief Check that 'name' exists and is a directory. + * + * Returns: + *\li #ISC_R_SUCCESS + * Success, file is a directory. + *\li #ISC_R_INVALIDFILE + * File is not a directory. + *\li #ISC_R_FILENOTFOUND + * File does not exist. + *\li other ISC_R_* errors translated from errno + * These occur when stat returns -1 and an errno. + */ + +bool +isc_file_iscurrentdir(const char *filename); +/*!< + * \brief Return #true if the given file name is the current directory ("."). + */ + +bool +isc_file_ischdiridempotent(const char *filename); +/*%< + * Return #true if calling chdir(filename) multiple times will give + * the same result as calling it once. + */ + +const char * +isc_file_basename(const char *filename); +/*%< + * Return the final component of the path in the file name. + */ + +isc_result_t +isc_file_progname(const char *filename, char *buf, size_t buflen); +/*!< + * \brief Given an operating system specific file name "filename" + * referring to a program, return the canonical program name. + * + * Any directory prefix or executable file name extension (if + * used on the OS in case) is stripped. On systems where program + * names are case insensitive, the name is canonicalized to all + * lower case. The name is written to 'buf', an array of 'buflen' + * chars, and null terminated. + * + * Returns: + *\li #ISC_R_SUCCESS + *\li #ISC_R_NOSPACE The name did not fit in 'buf'. + */ + +isc_result_t +isc_file_template(const char *path, const char *templet, char *buf, + size_t buflen); +/*%< + * Create an OS specific template using 'path' to define the directory + * 'templet' to describe the filename and store the result in 'buf' + * such that path can be renamed to buf atomically. + */ + +isc_result_t +isc_file_renameunique(const char *file, char *templet); +/*%< + * Rename 'file' using 'templet' as a template for the new file name. + */ + +isc_result_t +isc_file_absolutepath(const char *filename, char *path, size_t pathlen); +/*%< + * Given a file name, return the fully qualified path to the file. + */ + +/* + * XXX We should also have a isc_file_writeeopen() function + * for safely open a file in a publicly writable directory + * (see write_open() in BIND 8's ns_config.c). + */ + +isc_result_t +isc_file_truncate(const char *filename, isc_offset_t size); +/*%< + * Truncate/extend the file specified to 'size' bytes. + */ + +isc_result_t +isc_file_safecreate(const char *filename, FILE **fp); +/*%< + * Open 'filename' for writing, truncating if necessary. Ensure that + * if it existed it was a normal file. If creating the file, ensure + * that only the owner can read/write it. + */ + +isc_result_t +isc_file_splitpath(isc_mem_t *mctx, const char *path, char **dirname, + char const **basename); +/*%< + * Split a path into dirname and basename. If 'path' contains no slash + * (or, on windows, backslash), then '*dirname' is set to ".". + * + * Allocates memory for '*dirname', which can be freed with isc_mem_free(). + * + * Returns: + * - ISC_R_SUCCESS on success + * - ISC_R_INVALIDFILE if 'path' is empty or ends with '/' + * - ISC_R_NOMEMORY if unable to allocate memory + */ + +isc_result_t +isc_file_getsize(const char *file, off_t *size); +/*%< + * Return the size of the file (stored in the parameter pointed + * to by 'size') in bytes. + * + * Returns: + * - ISC_R_SUCCESS on success + */ + +isc_result_t +isc_file_getsizefd(int fd, off_t *size); +/*%< + * Return the size of the file (stored in the parameter pointed + * to by 'size') in bytes. + * + * Returns: + * - ISC_R_SUCCESS on success + */ + +isc_result_t +isc_file_sanitize(const char *dir, const char *base, const char *ext, + char *path, size_t length); +/*%< + * Generate a sanitized filename, such as for MKEYS or NZF files. + * + * Historically, MKEYS and NZF files used SHA256 hashes of the view + * name for the filename; this was to deal with the possibility of + * forbidden characters such as "/" being in a view name, and to + * avoid problems with case-insensitive file systems. + * + * Given a basename 'base' and an extension 'ext', this function checks + * for the existence of file using the old-style name format in directory + * 'dir'. If found, it returns the path to that file. If there is no + * file already in place, a new pathname is generated; if the basename + * contains any excluded characters, then a truncated SHA256 hash is + * used, otherwise the basename is used. The path name is copied + * into 'path', which must point to a buffer of at least 'length' + * bytes. + * + * Requires: + * - base != NULL + * - path != NULL + * + * Returns: + * - ISC_R_SUCCESS on success + * - ISC_R_NOSPACE if the resulting path would be longer than 'length' + */ + +bool +isc_file_isdirwritable(const char *path); +/*%< + * Return true if the path is a directory and is writable + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/formatcheck.h b/lib/isc/include/isc/formatcheck.h new file mode 100644 index 0000000..e3a37b0 --- /dev/null +++ b/lib/isc/include/isc/formatcheck.h @@ -0,0 +1,33 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/formatcheck.h */ + +/*% + * ISC_FORMAT_PRINTF(). + * + * \li fmt is the location of the format string parameter. + * \li args is the location of the first argument (or 0 for no argument + * checking). + * + * Note: + * \li The first parameter is 1, not 0. + */ +#ifdef __GNUC__ +#define ISC_FORMAT_PRINTF(fmt, args) \ + __attribute__((__format__(__printf__, fmt, args))) +#else /* ifdef __GNUC__ */ +#define ISC_FORMAT_PRINTF(fmt, args) +#endif /* ifdef __GNUC__ */ diff --git a/lib/isc/include/isc/fuzz.h b/lib/isc/include/isc/fuzz.h new file mode 100644 index 0000000..ce322ea --- /dev/null +++ b/lib/isc/include/isc/fuzz.h @@ -0,0 +1,23 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +typedef enum { + isc_fuzz_none, + isc_fuzz_client, + isc_fuzz_tcpclient, + isc_fuzz_resolver, + isc_fuzz_http, + isc_fuzz_rndc +} isc_fuzztype_t; diff --git a/lib/isc/include/isc/glob.h b/lib/isc/include/isc/glob.h new file mode 100644 index 0000000..c9e8d19 --- /dev/null +++ b/lib/isc/include/isc/glob.h @@ -0,0 +1,43 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#include <isc/lang.h> +#include <isc/result.h> + +#if HAVE_GLOB_H +#include <glob.h> +#else +#include <stddef.h> + +#include <isc/mem.h> + +typedef struct { + size_t gl_pathc; + char **gl_pathv; + isc_mem_t *mctx; + void *reserved; +} glob_t; + +#endif + +ISC_LANG_BEGINDECLS + +isc_result_t +isc_glob(const char *pattern, glob_t *pglob); + +void +isc_globfree(glob_t *pglob); + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/hash.h b/lib/isc/include/isc/hash.h new file mode 100644 index 0000000..ee9e74f --- /dev/null +++ b/lib/isc/include/isc/hash.h @@ -0,0 +1,63 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#include <inttypes.h> +#include <stdbool.h> + +#include "isc/lang.h" +#include "isc/types.h" + +/*** + *** Functions + ***/ +ISC_LANG_BEGINDECLS + +const void * +isc_hash_get_initializer(void); + +void +isc_hash_set_initializer(const void *initializer); + +#define isc_hash_function isc_hash64 + +uint32_t +isc_hash32(const void *data, const size_t length, const bool case_sensitive); +uint64_t +isc_hash64(const void *data, const size_t length, const bool case_sensitive); +/*!< + * \brief Calculate a hash over data. + * + * This hash function is useful for hashtables. The hash function is + * opaque and not important to the caller. The returned hash values are + * non-deterministic and will have different mapping every time a + * process using this library is run, but will have uniform + * distribution. + * + * isc_hash_32/64() calculates the hash from start to end over the + * input data. + * + * 'data' is the data to be hashed. + * + * 'length' is the size of the data to be hashed. + * + * 'case_sensitive' specifies whether the hash key should be treated as + * case_sensitive values. It should typically be false if the hash key + * is a DNS name. + * + * Returns: + * \li 32 or 64-bit hash value + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/heap.h b/lib/isc/include/isc/heap.h new file mode 100644 index 0000000..98ae74c --- /dev/null +++ b/lib/isc/include/isc/heap.h @@ -0,0 +1,161 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/heap.h */ + +#include <stdbool.h> + +#include <isc/lang.h> +#include <isc/types.h> + +ISC_LANG_BEGINDECLS + +/*% + * The comparison function returns true if the first argument has + * higher priority than the second argument, and false otherwise. + */ +typedef bool (*isc_heapcompare_t)(void *, void *); + +/*% + * The index function allows the client of the heap to receive a callback + * when an item's index number changes. This allows it to maintain + * sync with its external state, but still delete itself, since deletions + * from the heap require the index be provided. + */ +typedef void (*isc_heapindex_t)(void *, unsigned int); + +/*% + * The heapaction function is used when iterating over the heap. + * + * NOTE: The heap structure CANNOT BE MODIFIED during the call to + * isc_heap_foreach(). + */ +typedef void (*isc_heapaction_t)(void *, void *); + +typedef struct isc_heap isc_heap_t; + +void +isc_heap_create(isc_mem_t *mctx, isc_heapcompare_t compare, + isc_heapindex_t index, unsigned int size_increment, + isc_heap_t **heapp); +/*!< + * \brief Create a new heap. The heap is implemented using a space-efficient + * storage method. When the heap elements are deleted space is not freed + * but will be reused when new elements are inserted. + * + * Heap elements are indexed from 1. + * + * Requires: + *\li "mctx" is valid. + *\li "compare" is a function which takes two void * arguments and + * returns true if the first argument has a higher priority than + * the second, and false otherwise. + *\li "index" is a function which takes a void *, and an unsigned int + * argument. This function will be called whenever an element's + * index value changes, so it may continue to delete itself from the + * heap. This option may be NULL if this functionality is unneeded. + *\li "size_increment" is a hint about how large the heap should grow + * when resizing is needed. If this is 0, a default size will be + * used, which is currently 1024, allowing space for an additional 1024 + * heap elements to be inserted before adding more space. + *\li "heapp" is not NULL, and "*heap" is NULL. + */ + +void +isc_heap_destroy(isc_heap_t **heapp); +/*!< + * \brief Destroys a heap. + * + * Requires: + *\li "heapp" is not NULL and "*heap" points to a valid isc_heap_t. + */ + +void +isc_heap_insert(isc_heap_t *heap, void *elt); +/*!< + * \brief Inserts a new element into a heap. + * + * Requires: + *\li "heapp" is not NULL and "*heap" points to a valid isc_heap_t. + */ + +void +isc_heap_delete(isc_heap_t *heap, unsigned int index); +/*!< + * \brief Deletes an element from a heap, by element index. + * + * Requires: + *\li "heapp" is not NULL and "*heap" points to a valid isc_heap_t. + *\li "index" is a valid element index, as provided by the "index" callback + * provided during heap creation. + */ + +void +isc_heap_increased(isc_heap_t *heap, unsigned int index); +/*!< + * \brief Indicates to the heap that an element's priority has increased. + * This function MUST be called whenever an element has increased in priority. + * + * Requires: + *\li "heapp" is not NULL and "*heap" points to a valid isc_heap_t. + *\li "index" is a valid element index, as provided by the "index" callback + * provided during heap creation. + */ + +void +isc_heap_decreased(isc_heap_t *heap, unsigned int index); +/*!< + * \brief Indicates to the heap that an element's priority has decreased. + * This function MUST be called whenever an element has decreased in priority. + * + * Requires: + *\li "heapp" is not NULL and "*heap" points to a valid isc_heap_t. + *\li "index" is a valid element index, as provided by the "index" callback + * provided during heap creation. + */ + +void * +isc_heap_element(isc_heap_t *heap, unsigned int index); +/*!< + * \brief Returns the element for a specific element index. + * + * Requires: + *\li "heapp" is not NULL and "*heap" points to a valid isc_heap_t. + *\li "index" is a valid element index, as provided by the "index" callback + * provided during heap creation. + * + * Returns: + *\li A pointer to the element for the element index. + */ + +void +isc_heap_foreach(isc_heap_t *heap, isc_heapaction_t action, void *uap); +/*!< + * \brief Iterate over the heap, calling an action for each element. The + * order of iteration is not sorted. + * + * Requires: + *\li "heapp" is not NULL and "*heap" points to a valid isc_heap_t. + *\li "action" is not NULL, and is a function which takes two arguments. + * The first is a void *, representing the element, and the second is + * "uap" as provided to isc_heap_foreach. + *\li "uap" is a caller-provided argument, and may be NULL. + * + * Note: + *\li The heap structure CANNOT be modified during this iteration. The only + * safe function to call while iterating the heap is isc_heap_element(). + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/hex.h b/lib/isc/include/isc/hex.h new file mode 100644 index 0000000..d5f714e --- /dev/null +++ b/lib/isc/include/isc/hex.h @@ -0,0 +1,98 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/hex.h */ + +#include <isc/lang.h> +#include <isc/types.h> + +ISC_LANG_BEGINDECLS + +/*** + *** Functions + ***/ + +isc_result_t +isc_hex_totext(isc_region_t *source, int wordlength, const char *wordbreak, + isc_buffer_t *target); +/*!< + * \brief Convert data into hex encoded text. + * + * Notes: + *\li The hex encoded text in 'target' will be divided into + * words of at most 'wordlength' characters, separated by + * the 'wordbreak' string. No parentheses will surround + * the text. + * + * Requires: + *\li 'source' is a region containing binary data + *\li 'target' is a text buffer containing available space + *\li 'wordbreak' points to a null-terminated string of + * zero or more whitespace characters + * + * Ensures: + *\li target will contain the hex encoded version of the data + * in source. The 'used' pointer in target will be advanced as + * necessary. + */ + +isc_result_t +isc_hex_decodestring(const char *cstr, isc_buffer_t *target); +/*!< + * \brief Decode a null-terminated hex string. + * + * Requires: + *\li 'cstr' is non-null. + *\li 'target' is a valid buffer. + * + * Returns: + *\li #ISC_R_SUCCESS -- the entire decoded representation of 'cstring' + * fit in 'target'. + *\li #ISC_R_BADHEX -- 'cstr' is not a valid hex encoding. + * + * Other error returns are any possible error code from: + * isc_lex_create(), + * isc_lex_openbuffer(), + * isc_hex_tobuffer(). + */ + +isc_result_t +isc_hex_tobuffer(isc_lex_t *lexer, isc_buffer_t *target, int length); +/*!< + * \brief Convert hex-encoded text from a lexer context into + * `target`. If 'length' is non-negative, it is the expected number of + * encoded octets to convert. + * + * If 'length' is -1 then 0 or more encoded octets are expected. + * If 'length' is -2 then 1 or more encoded octets are expected. + * + * Returns: + *\li #ISC_R_BADHEX -- invalid hex encoding + *\li #ISC_R_UNEXPECTEDEND: the text does not contain the expected + * number of encoded octets. + * + * Requires: + *\li 'lexer' is a valid lexer context + *\li 'target' is a buffer containing binary data + *\li 'length' is -2, -1, or non-negative + * + * Ensures: + *\li target will contain the data represented by the hex encoded + * string parsed by the lexer. No more than `length` octets will + * be read, if `length` is non-negative. The 'used' pointer in + * 'target' will be advanced as necessary. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/hmac.h b/lib/isc/include/isc/hmac.h new file mode 100644 index 0000000..68b63d4 --- /dev/null +++ b/lib/isc/include/isc/hmac.h @@ -0,0 +1,148 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +/*! + * \file isc/hmac.h + * \brief This is the header for for message authentication code. + */ + +#pragma once + +#include <isc/lang.h> +#include <isc/md.h> +#include <isc/result.h> +#include <isc/types.h> + +typedef void isc_hmac_t; + +/** + * isc_hmac: + * @type: the digest type + * @key: the key + * @keylen: the length of the key + * @buf: data to hash + * @len: length of the data to hash + * @digest: the output buffer + * @digestlen: in: the length of @digest + * out: the length of the data written to @digest + * + * This function computes the message authentication code using a digest type + * @type with key @key which is @keylen bytes long from data in @buf which is + * @len bytes long, and places the output into @digest, which must have space + * for the hash function output (use ISC_MAX_MD_SIZE if unsure). @digestlen + * is used to pass in the length of the digest buffer and returns the length + * of digest written to @digest. + */ +isc_result_t +isc_hmac(const isc_md_type_t *type, const void *key, const size_t keylen, + const unsigned char *buf, const size_t len, unsigned char *digest, + unsigned int *digestlen); + +/** + * isc_hmac_new: + * + * This function allocates, initializes and returns HMAC context. + */ +isc_hmac_t * +isc_hmac_new(void); + +/** + * isc_hmac_free: + * @md: HMAC context + * + * This function cleans up HMAC context and frees up the space allocated to it. + */ +void +isc_hmac_free(isc_hmac_t *hmac); + +/** + * isc_hmac_init: + * @md: HMAC context + * @key: HMAC key + * @keylen: HMAC key length + * @type: digest type + * + * This function sets up HMAC context to use a hash function of @type and key + * @key which is @keylen bytes long. + */ + +isc_result_t +isc_hmac_init(isc_hmac_t *hmac, const void *key, const size_t keylen, + const isc_md_type_t *type); + +/** + * isc_hmac_reset: + * @hmac: HMAC context + * + * This function resets the HMAC context. This can be used to reuse an already + * existing context. + */ +isc_result_t +isc_hmac_reset(isc_hmac_t *hmac); + +/** + * isc_hmac_update: + * @hmac: HMAC context + * @buf: data to hash + * @len: length of the data to hash + * + * This function can be called repeatedly with chunks of the message @buf to be + * authenticated which is @len bytes long. + */ +isc_result_t +isc_hmac_update(isc_hmac_t *hmac, const unsigned char *buf, const size_t len); + +/** + * isc_hmac_final: + * @hmac: HMAC context + * @digest: the output buffer + * @digestlen: in: the length of @digest + * out: the length of the data written to @digest + * + * This function retrieves the message authentication code from @hmac and places + * it in @digest, which must have space for the hash function output. @digestlen + * is used to pass in the length of the digest buffer and returns the length + * of digest written to @digest. After calling this function no additional + * calls to isc_hmac_update() can be made. + */ +isc_result_t +isc_hmac_final(isc_hmac_t *hmac, unsigned char *digest, + unsigned int *digestlen); + +/** + * isc_hmac_md_type: + * @hmac: HMAC context + * + * This function return the isc_md_type_t previously set for the supplied + * HMAC context or NULL if no isc_md_type_t has been set. + */ +const isc_md_type_t * +isc_hmac_get_md_type(isc_hmac_t *hmac); + +/** + * isc_hmac_get_size: + * + * This function return the size of the message digest when passed an isc_hmac_t + * structure, i.e. the size of the hash. + */ +size_t +isc_hmac_get_size(isc_hmac_t *hmac); + +/** + * isc_hmac_get_block_size: + * + * This function return the block size of the message digest when passed an + * isc_hmac_t structure. + */ +int +isc_hmac_get_block_size(isc_hmac_t *hmac); diff --git a/lib/isc/include/isc/ht.h b/lib/isc/include/isc/ht.h new file mode 100644 index 0000000..163fbef --- /dev/null +++ b/lib/isc/include/isc/ht.h @@ -0,0 +1,191 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +/* ! \file */ + +#pragma once + +#include <inttypes.h> +#include <string.h> + +#include <isc/result.h> +#include <isc/types.h> + +typedef struct isc_ht isc_ht_t; +typedef struct isc_ht_iter isc_ht_iter_t; + +enum { ISC_HT_CASE_SENSITIVE = 0x00, ISC_HT_CASE_INSENSITIVE = 0x01 }; + +/*% + * Initialize hashtable at *htp, using memory context and size of (1<<bits) + * + * If 'options' contains ISC_HT_CASE_INSENSITIVE, then upper- and lower-case + * letters in key values will generate the same hash values; this can be used + * when the key for a hash table is a DNS name. + * + * Requires: + *\li 'htp' is not NULL and '*htp' is NULL. + *\li 'mctx' is a valid memory context. + *\li 'bits' >=1 and 'bits' <=32 + * + */ +void +isc_ht_init(isc_ht_t **htp, isc_mem_t *mctx, uint8_t bits, + unsigned int options); + +/*% + * Destroy hashtable, freeing everything + * + * Requires: + * \li '*htp' is valid hashtable + */ +void +isc_ht_destroy(isc_ht_t **htp); + +/*% + * Add a node to hashtable, pointed by binary key 'key' of size 'keysize'; + * set its value to 'value' + * + * Requires: + *\li 'ht' is a valid hashtable + *\li write-lock + * + * Returns: + *\li #ISC_R_NOMEMORY -- not enough memory to create pool + *\li #ISC_R_EXISTS -- node of the same key already exists + *\li #ISC_R_SUCCESS -- all is well. + */ +isc_result_t +isc_ht_add(isc_ht_t *ht, const unsigned char *key, const uint32_t keysize, + void *value); + +/*% + * Find a node matching 'key'/'keysize' in hashtable 'ht'; + * if found, set '*valuep' to its value. (If 'valuep' is NULL, + * then simply return SUCCESS or NOTFOUND to indicate whether the + * key exists in the hashtable.) + * + * Requires: + * \li 'ht' is a valid hashtable + * \li read-lock + * + * Returns: + * \li #ISC_R_SUCCESS -- success + * \li #ISC_R_NOTFOUND -- key not found + */ +isc_result_t +isc_ht_find(const isc_ht_t *ht, const unsigned char *key, + const uint32_t keysize, void **valuep); + +/*% + * Delete node from hashtable + * + * Requires: + *\li ht is a valid hashtable + *\li write-lock + * + * Returns: + *\li #ISC_R_NOTFOUND -- key not found + *\li #ISC_R_SUCCESS -- all is well + */ +isc_result_t +isc_ht_delete(isc_ht_t *ht, const unsigned char *key, const uint32_t keysize); + +/*% + * Create an iterator for the hashtable; point '*itp' to it. + * + * Requires: + *\li 'ht' is a valid hashtable + *\li 'itp' is non NULL and '*itp' is NULL. + */ +void +isc_ht_iter_create(isc_ht_t *ht, isc_ht_iter_t **itp); + +/*% + * Destroy the iterator '*itp', set it to NULL + * + * Requires: + *\li 'itp' is non NULL and '*itp' is non NULL. + */ +void +isc_ht_iter_destroy(isc_ht_iter_t **itp); + +/*% + * Set an iterator to the first entry. + * + * Requires: + *\li 'it' is non NULL. + * + * Returns: + * \li #ISC_R_SUCCESS -- success + * \li #ISC_R_NOMORE -- no data in the hashtable + */ +isc_result_t +isc_ht_iter_first(isc_ht_iter_t *it); + +/*% + * Set an iterator to the next entry. + * + * Requires: + *\li 'it' is non NULL. + * + * Returns: + * \li #ISC_R_SUCCESS -- success + * \li #ISC_R_NOMORE -- end of hashtable reached + */ +isc_result_t +isc_ht_iter_next(isc_ht_iter_t *it); + +/*% + * Delete current entry and set an iterator to the next entry. + * + * Requires: + *\li 'it' is non NULL. + * + * Returns: + * \li #ISC_R_SUCCESS -- success + * \li #ISC_R_NOMORE -- end of hashtable reached + */ +isc_result_t +isc_ht_iter_delcurrent_next(isc_ht_iter_t *it); + +/*% + * Set 'value' to the current value under the iterator + * + * Requires: + *\li 'it' is non NULL. + *\li 'valuep' is non NULL and '*valuep' is NULL. + */ +void +isc_ht_iter_current(isc_ht_iter_t *it, void **valuep); + +/*% + * Set 'key' and 'keysize to the current key and keysize for the value + * under the iterator + * + * Requires: + *\li 'it' is non NULL. + *\li 'key' is non NULL and '*key' is NULL. + *\li 'keysize' is non NULL. + */ +void +isc_ht_iter_currentkey(isc_ht_iter_t *it, unsigned char **key, size_t *keysize); + +/*% + * Returns the number of items in the hashtable. + * + * Requires: + *\li 'ht' is a valid hashtable + */ +size_t +isc_ht_count(const isc_ht_t *ht); diff --git a/lib/isc/include/isc/httpd.h b/lib/isc/include/isc/httpd.h new file mode 100644 index 0000000..1f69a4c --- /dev/null +++ b/lib/isc/include/isc/httpd.h @@ -0,0 +1,63 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file */ + +#include <stdbool.h> + +#include <isc/event.h> +#include <isc/eventclass.h> +#include <isc/mutex.h> +#include <isc/task.h> +#include <isc/time.h> +#include <isc/types.h> +#include <isc/url.h> + +#define HTTPD_EVENTCLASS ISC_EVENTCLASS(4300) +#define HTTPD_SHUTDOWN (HTTPD_EVENTCLASS + 0x0001) + +#define ISC_HTTPDMGR_SHUTTINGDOWN 0x00000001 + +typedef isc_result_t(isc_httpdaction_t)( + const isc_httpd_t *httpd, const isc_httpdurl_t *urlinfo, void *arg, + unsigned int *retcode, const char **retmsg, const char **mimetype, + isc_buffer_t *body, isc_httpdfree_t **freecb, void **freecb_args); + +typedef bool(isc_httpdclientok_t)(const isc_sockaddr_t *, void *); + +isc_result_t +isc_httpdmgr_create(isc_nm_t *nm, isc_mem_t *mctx, isc_sockaddr_t *addr, + isc_httpdclientok_t *client_ok, + isc_httpdondestroy_t *ondestroy, void *cb_arg, + isc_httpdmgr_t **httpdmgrp); + +void +isc_httpdmgr_shutdown(isc_httpdmgr_t **httpdp); + +isc_result_t +isc_httpdmgr_addurl(isc_httpdmgr_t *httpdmgr, const char *url, bool isstatic, + isc_httpdaction_t *func, void *arg); + +void +isc_httpd_setfinishhook(void (*fn)(void)); + +bool +isc_httpdurl_isstatic(const isc_httpdurl_t *url); + +const isc_time_t * +isc_httpdurl_loadtime(const isc_httpdurl_t *url); + +const isc_time_t * +isc_httpd_if_modified_since(const isc_httpd_t *httpd); diff --git a/lib/isc/include/isc/interfaceiter.h b/lib/isc/include/isc/interfaceiter.h new file mode 100644 index 0000000..c696091 --- /dev/null +++ b/lib/isc/include/isc/interfaceiter.h @@ -0,0 +1,127 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/***** +***** Module Info +*****/ + +/*! \file isc/interfaceiter.h + * \brief Iterates over the list of network interfaces. + * + * Interfaces whose address family is not supported are ignored and never + * returned by the iterator. Interfaces whose netmask, interface flags, + * or similar cannot be obtained are also ignored, and the failure is logged. + * + * Standards: + * The API for scanning varies greatly among operating systems. + * This module attempts to hide the differences. + */ + +/*** + *** Imports + ***/ + +#include <inttypes.h> + +#include <isc/lang.h> +#include <isc/netaddr.h> +#include <isc/types.h> + +/*! + * \brief Public structure describing a network interface. + */ + +struct isc_interface { + char name[32]; /*%< Interface name, null-terminated. */ + unsigned int af; /*%< Address family. */ + isc_netaddr_t address; /*%< Local address. */ + isc_netaddr_t netmask; /*%< Network mask. */ + isc_netaddr_t dstaddress; /*%< Destination address + * (point-to-point + * only). */ + uint32_t flags; /*%< Flags; see INTERFACE flags. */ +}; + +/*@{*/ +/*! Interface flags. */ + +#define INTERFACE_F_UP 0x00000001U +#define INTERFACE_F_POINTTOPOINT 0x00000002U +#define INTERFACE_F_LOOPBACK 0x00000004U +/*@}*/ + +/*** + *** Functions + ***/ + +ISC_LANG_BEGINDECLS + +isc_result_t +isc_interfaceiter_create(isc_mem_t *mctx, isc_interfaceiter_t **iterp); +/*!< + * \brief Create an iterator for traversing the operating system's list + * of network interfaces. + * + * Returns: + *\li #ISC_R_SUCCESS + * \li #ISC_R_NOMEMORY + *\li Various network-related errors + */ + +isc_result_t +isc_interfaceiter_first(isc_interfaceiter_t *iter); +/*!< + * \brief Position the iterator on the first interface. + * + * Returns: + *\li #ISC_R_SUCCESS Success. + *\li #ISC_R_NOMORE There are no interfaces. + */ + +isc_result_t +isc_interfaceiter_current(isc_interfaceiter_t *iter, isc_interface_t *ifdata); +/*!< + * \brief Get information about the interface the iterator is currently + * positioned at and store it at *ifdata. + * + * Requires: + *\li The iterator has been successfully positioned using + * isc_interface_iter_first() / isc_interface_iter_next(). + * + * Returns: + *\li #ISC_R_SUCCESS Success. + */ + +isc_result_t +isc_interfaceiter_next(isc_interfaceiter_t *iter); +/*!< + * \brief Position the iterator on the next interface. + * + * Requires: + * \li The iterator has been successfully positioned using + * isc_interface_iter_first() / isc_interface_iter_next(). + * + * Returns: + *\li #ISC_R_SUCCESS Success. + *\li #ISC_R_NOMORE There are no more interfaces. + */ + +void +isc_interfaceiter_destroy(isc_interfaceiter_t **iterp); +/*!< + * \brief Destroy the iterator. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/iterated_hash.h b/lib/isc/include/isc/iterated_hash.h new file mode 100644 index 0000000..b5d6ab6 --- /dev/null +++ b/lib/isc/include/isc/iterated_hash.h @@ -0,0 +1,38 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#include <isc/lang.h> + +/* + * The maximal hash length that can be encoded in a name + * using base32hex. floor(255/8)*5 + */ +#define NSEC3_MAX_HASH_LENGTH 155 + +/* + * The maximum has that can be encoded in a single label using + * base32hex. floor(63/8)*5 + */ +#define NSEC3_MAX_LABEL_HASH 35 + +ISC_LANG_BEGINDECLS + +int +isc_iterated_hash(unsigned char *out, const unsigned int hashalg, + const int iterations, const unsigned char *salt, + const int saltlength, const unsigned char *in, + const int inlength); + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/lang.h b/lib/isc/include/isc/lang.h new file mode 100644 index 0000000..b7e88a5 --- /dev/null +++ b/lib/isc/include/isc/lang.h @@ -0,0 +1,24 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/lang.h */ + +#ifdef __cplusplus +#define ISC_LANG_BEGINDECLS extern "C" { +#define ISC_LANG_ENDDECLS } +#else /* ifdef __cplusplus */ +#define ISC_LANG_BEGINDECLS +#define ISC_LANG_ENDDECLS +#endif /* ifdef __cplusplus */ diff --git a/lib/isc/include/isc/lex.h b/lib/isc/include/isc/lex.h new file mode 100644 index 0000000..14b29cf --- /dev/null +++ b/lib/isc/include/isc/lex.h @@ -0,0 +1,444 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/***** +***** Module Info +*****/ + +/*! \file isc/lex.h + * \brief The "lex" module provides a lightweight tokenizer. It can operate + * on files or buffers, and can handle "include". It is designed for + * parsing of DNS master files and the BIND configuration file, but + * should be general enough to tokenize other things, e.g. HTTP. + * + * \li MP: + * No synchronization is provided. Clients must ensure exclusive + * access. + * + * \li Reliability: + * No anticipated impact. + * + * \li Resources: + * TBS + * + * \li Security: + * No anticipated impact. + * + * \li Standards: + * None. + */ + +/*** + *** Imports + ***/ + +#include <stdbool.h> +#include <stdio.h> + +#include <isc/lang.h> +#include <isc/region.h> +#include <isc/types.h> + +ISC_LANG_BEGINDECLS + +/*** + *** Options + ***/ + +/*@{*/ +/*! + * Various options for isc_lex_gettoken(). + */ + +#define ISC_LEXOPT_EOL 0x0001 /*%< Want end-of-line token. */ +#define ISC_LEXOPT_EOF 0x0002 /*%< Want end-of-file token. */ +#define ISC_LEXOPT_INITIALWS 0x0004 /*%< Want initial whitespace. */ +#define ISC_LEXOPT_NUMBER 0x0008 /*%< Recognize numbers. */ +#define ISC_LEXOPT_QSTRING 0x0010 /*%< Recognize qstrings. */ +/*@}*/ + +/*@{*/ +/*! + * The ISC_LEXOPT_DNSMULTILINE option handles the processing of '(' and ')' in + * the DNS master file format. If this option is set, then the + * ISC_LEXOPT_INITIALWS and ISC_LEXOPT_EOL options will be ignored when + * the paren count is > 0. To use this option, '(' and ')' must be special + * characters. + */ +#define ISC_LEXOPT_DNSMULTILINE 0x0020 /*%< Handle '(' and ')'. */ +#define ISC_LEXOPT_NOMORE 0x0040 /*%< Want "no more" token. */ + +#define ISC_LEXOPT_CNUMBER 0x0080 /*%< Recognize octal and hex. */ +#define ISC_LEXOPT_ESCAPE 0x0100 /*%< Recognize escapes. */ +#define ISC_LEXOPT_QSTRINGMULTILINE 0x0200 /*%< Allow multiline "" strings */ +#define ISC_LEXOPT_OCTAL 0x0400 /*%< Expect a octal number. */ +#define ISC_LEXOPT_BTEXT 0x0800 /*%< Bracketed text. */ +#define ISC_LEXOPT_VPAIR 0x1000 /*%< Recognize value pair. */ +#define ISC_LEXOPT_QVPAIR 0x2000 /*%< Recognize quoted value pair. */ +/*@}*/ +/*@{*/ +/*! + * Various commenting styles, which may be changed at any time with + * isc_lex_setcomments(). + */ + +#define ISC_LEXCOMMENT_C 0x01 +#define ISC_LEXCOMMENT_CPLUSPLUS 0x02 +#define ISC_LEXCOMMENT_SHELL 0x04 +#define ISC_LEXCOMMENT_DNSMASTERFILE 0x08 +/*@}*/ + +/*** + *** Types + ***/ + +/*! Lex */ + +typedef char isc_lexspecials_t[256]; + +/* Tokens */ + +typedef enum { + isc_tokentype_unknown = 0, + isc_tokentype_string = 1, + isc_tokentype_number = 2, + isc_tokentype_qstring = 3, + isc_tokentype_eol = 4, + isc_tokentype_eof = 5, + isc_tokentype_initialws = 6, + isc_tokentype_special = 7, + isc_tokentype_nomore = 8, + isc_tokentype_btext = 9, + isc_tokentype_vpair = 10, + isc_tokentype_qvpair = 11, +} isc_tokentype_t; + +typedef union { + char as_char; + unsigned long as_ulong; + isc_region_t as_region; + isc_textregion_t as_textregion; + void *as_pointer; +} isc_tokenvalue_t; + +typedef struct isc_token { + isc_tokentype_t type; + isc_tokenvalue_t value; +} isc_token_t; + +/*** + *** Functions + ***/ + +isc_result_t +isc_lex_create(isc_mem_t *mctx, size_t max_token, isc_lex_t **lexp); +/*%< + * Create a lexer. + * + * 'max_token' is a hint of the number of bytes in the largest token. + * + * Requires: + *\li '*lexp' is a valid lexer. + * + * Ensures: + *\li On success, *lexp is attached to the newly created lexer. + * + * Returns: + *\li #ISC_R_SUCCESS + *\li #ISC_R_NOMEMORY + */ + +void +isc_lex_destroy(isc_lex_t **lexp); +/*%< + * Destroy the lexer. + * + * Requires: + *\li '*lexp' is a valid lexer. + * + * Ensures: + *\li *lexp == NULL + */ + +unsigned int +isc_lex_getcomments(isc_lex_t *lex); +/*%< + * Return the current lexer commenting styles. + * + * Requires: + *\li 'lex' is a valid lexer. + * + * Returns: + *\li The commenting styles which are currently allowed. + */ + +void +isc_lex_setcomments(isc_lex_t *lex, unsigned int comments); +/*%< + * Set allowed lexer commenting styles. + * + * Requires: + *\li 'lex' is a valid lexer. + * + *\li 'comments' has meaningful values. + */ + +void +isc_lex_getspecials(isc_lex_t *lex, isc_lexspecials_t specials); +/*%< + * Put the current list of specials into 'specials'. + * + * Requires: + *\li 'lex' is a valid lexer. + */ + +void +isc_lex_setspecials(isc_lex_t *lex, isc_lexspecials_t specials); +/*!< + * The characters in 'specials' are returned as tokens. Along with + * whitespace, they delimit strings and numbers. + * + * Note: + *\li Comment processing takes precedence over special character + * recognition. + * + * Requires: + *\li 'lex' is a valid lexer. + */ + +isc_result_t +isc_lex_openfile(isc_lex_t *lex, const char *filename); +/*%< + * Open 'filename' and make it the current input source for 'lex'. + * + * Requires: + *\li 'lex' is a valid lexer. + * + *\li filename is a valid C string. + * + * Returns: + *\li #ISC_R_SUCCESS + *\li #ISC_R_NOMEMORY Out of memory + *\li #ISC_R_NOTFOUND File not found + *\li #ISC_R_NOPERM No permission to open file + *\li #ISC_R_FAILURE Couldn't open file, not sure why + *\li #ISC_R_UNEXPECTED + */ + +isc_result_t +isc_lex_openstream(isc_lex_t *lex, FILE *stream); +/*%< + * Make 'stream' the current input source for 'lex'. + * + * Requires: + *\li 'lex' is a valid lexer. + * + *\li 'stream' is a valid C stream. + * + * Returns: + *\li #ISC_R_SUCCESS + *\li #ISC_R_NOMEMORY Out of memory + */ + +isc_result_t +isc_lex_openbuffer(isc_lex_t *lex, isc_buffer_t *buffer); +/*%< + * Make 'buffer' the current input source for 'lex'. + * + * Requires: + *\li 'lex' is a valid lexer. + * + *\li 'buffer' is a valid buffer. + * + * Returns: + *\li #ISC_R_SUCCESS + *\li #ISC_R_NOMEMORY Out of memory + */ + +isc_result_t +isc_lex_close(isc_lex_t *lex); +/*%< + * Close the most recently opened object (i.e. file or buffer). + * + * Returns: + *\li #ISC_R_SUCCESS + *\li #ISC_R_NOMORE No more input sources + */ + +isc_result_t +isc_lex_gettoken(isc_lex_t *lex, unsigned int options, isc_token_t *tokenp); +/*%< + * Get the next token. + * + * Requires: + *\li 'lex' is a valid lexer. + * + *\li 'lex' has an input source. + * + *\li 'options' contains valid options. + * + *\li '*tokenp' is a valid pointer. + * + * Returns: + *\li #ISC_R_SUCCESS + *\li #ISC_R_UNEXPECTEDEND + *\li #ISC_R_NOMEMORY + * + * These two results are returned only if their corresponding lexer + * options are not set. + * + *\li #ISC_R_EOF End of input source + *\li #ISC_R_NOMORE No more input sources + */ + +isc_result_t +isc_lex_getmastertoken(isc_lex_t *lex, isc_token_t *token, + isc_tokentype_t expect, bool eol); +/*%< + * Get the next token from a DNS master file type stream. This is a + * convenience function that sets appropriate options and handles quoted + * strings and end of line correctly for master files. It also ungets + * unexpected tokens. If `eol` is set then expect end-of-line otherwise + * eol is a error. + * + * Requires: + *\li 'lex' is a valid lexer. + * + *\li 'token' is a valid pointer + * + * Returns: + * + * \li any return code from isc_lex_gettoken(). + */ + +isc_result_t +isc_lex_getoctaltoken(isc_lex_t *lex, isc_token_t *token, bool eol); +/*%< + * Get the next token from a DNS master file type stream. This is a + * convenience function that sets appropriate options and handles end + * of line correctly for master files. It also ungets unexpected tokens. + * If `eol` is set then expect end-of-line otherwise eol is a error. + * + * Requires: + *\li 'lex' is a valid lexer. + * + *\li 'token' is a valid pointer + * + * Returns: + * + * \li any return code from isc_lex_gettoken(). + */ + +void +isc_lex_ungettoken(isc_lex_t *lex, isc_token_t *tokenp); +/*%< + * Unget the current token. + * + * Requires: + *\li 'lex' is a valid lexer. + * + *\li 'lex' has an input source. + * + *\li 'tokenp' points to a valid token. + * + *\li There is no ungotten token already. + */ + +void +isc_lex_getlasttokentext(isc_lex_t *lex, isc_token_t *tokenp, isc_region_t *r); +/*%< + * Returns a region containing the text of the last token returned. + * + * Requires: + *\li 'lex' is a valid lexer. + * + *\li 'lex' has an input source. + * + *\li 'tokenp' points to a valid token. + * + *\li A token has been gotten and not ungotten. + */ + +char * +isc_lex_getsourcename(isc_lex_t *lex); +/*%< + * Return the input source name. + * + * Requires: + *\li 'lex' is a valid lexer. + * + * Returns: + * \li source name or NULL if no current source. + *\li result valid while current input source exists. + */ + +unsigned long +isc_lex_getsourceline(isc_lex_t *lex); +/*%< + * Return the input source line number. + * + * Requires: + *\li 'lex' is a valid lexer. + * + * Returns: + *\li Current line number or 0 if no current source. + */ + +isc_result_t +isc_lex_setsourcename(isc_lex_t *lex, const char *name); +/*%< + * Assigns a new name to the input source. + * + * Requires: + * + * \li 'lex' is a valid lexer. + * + * Returns: + * \li #ISC_R_SUCCESS + * \li #ISC_R_NOMEMORY + * \li #ISC_R_NOTFOUND - there are no sources. + */ + +isc_result_t +isc_lex_setsourceline(isc_lex_t *lex, unsigned long line); +/*%< + * Assigns a new line number to the input source. This can be used + * when parsing a buffer that's been excerpted from the middle a file, + * allowing logged messages to display the correct line number, + * rather than the line number within the buffer. + * + * Requires: + * + * \li 'lex' is a valid lexer. + * + * Returns: + * \li #ISC_R_SUCCESS + * \li #ISC_R_NOTFOUND - there are no sources. + */ + +bool +isc_lex_isfile(isc_lex_t *lex); +/*%< + * Return whether the current input source is a file. + * + * Requires: + *\li 'lex' is a valid lexer. + * + * Returns: + * \li #true if the current input is a file, + *\li #false otherwise. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/list.h b/lib/isc/include/isc/list.h new file mode 100644 index 0000000..2cf4437 --- /dev/null +++ b/lib/isc/include/isc/list.h @@ -0,0 +1,229 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#include <isc/assertions.h> + +#define ISC_LINK_TOMBSTONE(type) ((type *)-1) + +#define ISC_LIST_INITIALIZER \ + { \ + .head = NULL, .tail = NULL, \ + } +#define ISC_LINK_INITIALIZER_TYPE(type) \ + { \ + .prev = ISC_LINK_TOMBSTONE(type), \ + .next = ISC_LINK_TOMBSTONE(type), \ + } +#define ISC_LINK_INITIALIZER ISC_LINK_INITIALIZER_TYPE(void) + +#ifdef ISC_LIST_CHECKINIT +#define ISC_LINK_INSIST(x) ISC_INSIST(x) +#else /* ifdef ISC_LIST_CHECKINIT */ +#define ISC_LINK_INSIST(x) +#endif /* ifdef ISC_LIST_CHECKINIT */ + +#define ISC_LIST(type) \ + struct { \ + type *head, *tail; \ + } +#define ISC_LIST_INIT(list) \ + do { \ + (list).head = NULL; \ + (list).tail = NULL; \ + } while (0) + +#define ISC_LINK(type) \ + struct { \ + type *prev, *next; \ + } +#define ISC_LINK_INIT_TYPE(elt, link, type) \ + do { \ + (elt)->link.prev = ISC_LINK_TOMBSTONE(type); \ + (elt)->link.next = ISC_LINK_TOMBSTONE(type); \ + } while (0) +#define ISC_LINK_INIT(elt, link) ISC_LINK_INIT_TYPE(elt, link, void) +#define ISC_LINK_LINKED_TYPE(elt, link, type) \ + ((type *)((elt)->link.prev) != ISC_LINK_TOMBSTONE(type)) +#define ISC_LINK_LINKED(elt, link) ISC_LINK_LINKED_TYPE(elt, link, void) + +#define ISC_LIST_HEAD(list) ((list).head) +#define ISC_LIST_TAIL(list) ((list).tail) +#define ISC_LIST_EMPTY(list) ((list).head == NULL) + +#define __ISC_LIST_PREPENDUNSAFE(list, elt, link) \ + do { \ + if ((list).head != NULL) { \ + (list).head->link.prev = (elt); \ + } else { \ + (list).tail = (elt); \ + } \ + (elt)->link.prev = NULL; \ + (elt)->link.next = (list).head; \ + (list).head = (elt); \ + } while (0) + +#define ISC_LIST_PREPEND(list, elt, link) \ + do { \ + ISC_LINK_INSIST(!ISC_LINK_LINKED(elt, link)); \ + __ISC_LIST_PREPENDUNSAFE(list, elt, link); \ + } while (0) + +#define ISC_LIST_INITANDPREPEND(list, elt, link) \ + __ISC_LIST_PREPENDUNSAFE(list, elt, link) + +#define __ISC_LIST_APPENDUNSAFE(list, elt, link) \ + do { \ + if ((list).tail != NULL) { \ + (list).tail->link.next = (elt); \ + } else { \ + (list).head = (elt); \ + } \ + (elt)->link.prev = (list).tail; \ + (elt)->link.next = NULL; \ + (list).tail = (elt); \ + } while (0) + +#define ISC_LIST_APPEND(list, elt, link) \ + do { \ + ISC_LINK_INSIST(!ISC_LINK_LINKED(elt, link)); \ + __ISC_LIST_APPENDUNSAFE(list, elt, link); \ + } while (0) + +#define ISC_LIST_INITANDAPPEND(list, elt, link) \ + __ISC_LIST_APPENDUNSAFE(list, elt, link) + +#define __ISC_LIST_UNLINKUNSAFE_TYPE(list, elt, link, type) \ + do { \ + if ((elt)->link.next != NULL) { \ + (elt)->link.next->link.prev = (elt)->link.prev; \ + } else { \ + ISC_INSIST((list).tail == (elt)); \ + (list).tail = (elt)->link.prev; \ + } \ + if ((elt)->link.prev != NULL) { \ + (elt)->link.prev->link.next = (elt)->link.next; \ + } else { \ + ISC_INSIST((list).head == (elt)); \ + (list).head = (elt)->link.next; \ + } \ + (elt)->link.prev = ISC_LINK_TOMBSTONE(type); \ + (elt)->link.next = ISC_LINK_TOMBSTONE(type); \ + ISC_INSIST((list).head != (elt)); \ + ISC_INSIST((list).tail != (elt)); \ + } while (0) + +#define __ISC_LIST_UNLINKUNSAFE(list, elt, link) \ + __ISC_LIST_UNLINKUNSAFE_TYPE(list, elt, link, void) + +#define ISC_LIST_UNLINK_TYPE(list, elt, link, type) \ + do { \ + ISC_LINK_INSIST(ISC_LINK_LINKED(elt, link)); \ + __ISC_LIST_UNLINKUNSAFE_TYPE(list, elt, link, type); \ + } while (0) +#define ISC_LIST_UNLINK(list, elt, link) \ + ISC_LIST_UNLINK_TYPE(list, elt, link, void) + +#define ISC_LIST_PREV(elt, link) ((elt)->link.prev) +#define ISC_LIST_NEXT(elt, link) ((elt)->link.next) + +#define __ISC_LIST_INSERTBEFOREUNSAFE(list, before, elt, link) \ + do { \ + if ((before)->link.prev == NULL) { \ + ISC_LIST_PREPEND(list, elt, link); \ + } else { \ + (elt)->link.prev = (before)->link.prev; \ + (before)->link.prev = (elt); \ + (elt)->link.prev->link.next = (elt); \ + (elt)->link.next = (before); \ + } \ + } while (0) + +#define ISC_LIST_INSERTBEFORE(list, before, elt, link) \ + do { \ + ISC_LINK_INSIST(ISC_LINK_LINKED(before, link)); \ + ISC_LINK_INSIST(!ISC_LINK_LINKED(elt, link)); \ + __ISC_LIST_INSERTBEFOREUNSAFE(list, before, elt, link); \ + } while (0) + +#define __ISC_LIST_INSERTAFTERUNSAFE(list, after, elt, link) \ + do { \ + if ((after)->link.next == NULL) { \ + ISC_LIST_APPEND(list, elt, link); \ + } else { \ + (elt)->link.next = (after)->link.next; \ + (after)->link.next = (elt); \ + (elt)->link.next->link.prev = (elt); \ + (elt)->link.prev = (after); \ + } \ + } while (0) + +#define ISC_LIST_INSERTAFTER(list, after, elt, link) \ + do { \ + ISC_LINK_INSIST(ISC_LINK_LINKED(after, link)); \ + ISC_LINK_INSIST(!ISC_LINK_LINKED(elt, link)); \ + __ISC_LIST_INSERTAFTERUNSAFE(list, after, elt, link); \ + } while (0) + +#define ISC_LIST_APPENDLIST(list1, list2, link) \ + do { \ + if (ISC_LIST_EMPTY(list1)) { \ + (list1) = (list2); \ + } else if (!ISC_LIST_EMPTY(list2)) { \ + (list1).tail->link.next = (list2).head; \ + (list2).head->link.prev = (list1).tail; \ + (list1).tail = (list2).tail; \ + } \ + (list2).head = NULL; \ + (list2).tail = NULL; \ + } while (0) + +#define ISC_LIST_PREPENDLIST(list1, list2, link) \ + do { \ + if (ISC_LIST_EMPTY(list1)) { \ + (list1) = (list2); \ + } else if (!ISC_LIST_EMPTY(list2)) { \ + (list2).tail->link.next = (list1).head; \ + (list1).head->link.prev = (list2).tail; \ + (list1).head = (list2).head; \ + } \ + (list2).head = NULL; \ + (list2).tail = NULL; \ + } while (0) + +#define ISC_LIST_ENQUEUE(list, elt, link) ISC_LIST_APPEND(list, elt, link) +#define __ISC_LIST_ENQUEUEUNSAFE(list, elt, link) \ + __ISC_LIST_APPENDUNSAFE(list, elt, link) +#define ISC_LIST_DEQUEUE(list, elt, link) \ + ISC_LIST_UNLINK_TYPE(list, elt, link, void) +#define ISC_LIST_DEQUEUE_TYPE(list, elt, link, type) \ + ISC_LIST_UNLINK_TYPE(list, elt, link, type) +#define __ISC_LIST_DEQUEUEUNSAFE(list, elt, link) \ + __ISC_LIST_UNLINKUNSAFE_TYPE(list, elt, link, void) +#define __ISC_LIST_DEQUEUEUNSAFE_TYPE(list, elt, link, type) \ + __ISC_LIST_UNLINKUNSAFE_TYPE(list, elt, link, type) + +#define ISC_LIST_MOVEUNSAFE(dest, src) \ + { \ + (dest).head = (src).head; \ + (dest).tail = (src).tail; \ + (src).head = NULL; \ + (src).tail = NULL; \ + } + +#define ISC_LIST_MOVE(dest, src) \ + { \ + INSIST(ISC_LIST_EMPTY(dest)); \ + ISC_LIST_MOVEUNSAFE(dest, src); \ + } diff --git a/lib/isc/include/isc/log.h b/lib/isc/include/isc/log.h new file mode 100644 index 0000000..54b4022 --- /dev/null +++ b/lib/isc/include/isc/log.h @@ -0,0 +1,853 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/log.h */ + +#include <stdarg.h> +#include <stdbool.h> +#include <stdio.h> +#include <syslog.h> /* XXXDCL NT */ + +#include <isc/formatcheck.h> +#include <isc/lang.h> +#include <isc/types.h> + +/*@{*/ +/*! + * \brief Severity levels, patterned after Unix's syslog levels. + * + */ +#define ISC_LOG_DEBUG(level) (level) +/*! + * #ISC_LOG_DYNAMIC can only be used for defining channels with + * isc_log_createchannel(), not to specify a level in isc_log_write(). + */ +#define ISC_LOG_DYNAMIC 0 +#define ISC_LOG_INFO (-1) +#define ISC_LOG_NOTICE (-2) +#define ISC_LOG_WARNING (-3) +#define ISC_LOG_ERROR (-4) +#define ISC_LOG_CRITICAL (-5) +/*@}*/ + +/*@{*/ +/*! + * \brief Destinations. + */ +#define ISC_LOG_TONULL 1 +#define ISC_LOG_TOSYSLOG 2 +#define ISC_LOG_TOFILE 3 +#define ISC_LOG_TOFILEDESC 4 +/*@}*/ + +/*@{*/ +/*% + * Channel flags. + */ +#define ISC_LOG_PRINTTIME 0x00001 +#define ISC_LOG_PRINTLEVEL 0x00002 +#define ISC_LOG_PRINTCATEGORY 0x00004 +#define ISC_LOG_PRINTMODULE 0x00008 +#define ISC_LOG_PRINTTAG 0x00010 /* tag and ":" */ +#define ISC_LOG_PRINTPREFIX 0x00020 /* tag only, no colon */ +#define ISC_LOG_PRINTALL 0x0003F +#define ISC_LOG_BUFFERED 0x00040 +#define ISC_LOG_DEBUGONLY 0x01000 +#define ISC_LOG_OPENERR 0x08000 /* internal */ +#define ISC_LOG_ISO8601 0x10000 /* if PRINTTIME, use ISO8601 */ +#define ISC_LOG_UTC 0x20000 /* if PRINTTIME, use UTC */ +/*@}*/ + +/*@{*/ +/*! + * \brief Other options. + * + * XXXDCL INFINITE doesn't yet work. Arguably it isn't needed, but + * since I am intend to make large number of versions work efficiently, + * INFINITE is going to be trivial to add to that. + */ +#define ISC_LOG_ROLLINFINITE (-1) +#define ISC_LOG_ROLLNEVER (-2) +#define ISC_LOG_MAX_VERSIONS 256 +/*@}*/ + +/*@{*/ +/*! + * \brief Type of suffix used on rolled log files. + */ +typedef enum { + isc_log_rollsuffix_increment, + isc_log_rollsuffix_timestamp +} isc_log_rollsuffix_t; +/*@}*/ + +/*! + * \brief Used to name the categories used by a library. + * + * An array of isc_logcategory + * structures names each category, and the id value is initialized by calling + * isc_log_registercategories. + */ +struct isc_logcategory { + const char *name; + unsigned int id; +}; + +/*% + * Similar to isc_logcategory, but for all the modules a library defines. + */ +struct isc_logmodule { + const char *name; + unsigned int id; +}; + +/*% + * The isc_logfile structure is initialized as part of an isc_logdestination + * before calling isc_log_createchannel(). + * + * When defining an #ISC_LOG_TOFILE + * channel the name, versions and maximum_size should be set before calling + * isc_log_createchannel(). To define an #ISC_LOG_TOFILEDESC channel set only + * the stream before the call. + * + * Setting maximum_size to zero implies no maximum. + */ +typedef struct isc_logfile { + FILE *stream; /*%< Initialized to NULL for + * #ISC_LOG_TOFILE. */ + const char *name; /*%< NULL for #ISC_LOG_TOFILEDESC. */ + int versions; /* >= 0, #ISC_LOG_ROLLNEVER, + * #ISC_LOG_ROLLINFINITE. */ + isc_log_rollsuffix_t suffix; + /*% + * stdio's ftell is standardized to return a long, which may well not + * be big enough for the largest file supportable by the operating + * system (though it is _probably_ big enough for the largest log + * anyone would want). st_size returned by fstat should be typedef'd + * to a size large enough for the largest possible file on a system. + */ + isc_offset_t maximum_size; + bool maximum_reached; /*%< Private. */ +} isc_logfile_t; + +/*% + * Passed to isc_log_createchannel to define the attributes of either + * a stdio or a syslog log. + */ +typedef union isc_logdestination { + isc_logfile_t file; + int facility; /* XXXDCL NT */ +} isc_logdestination_t; + +/*@{*/ +/*% + * The built-in categories of libisc. + * + * Each library registering categories should provide library_LOGCATEGORY_name + * definitions with indexes into its isc_logcategory structure corresponding to + * the order of the names. + */ +extern isc_logcategory_t isc_categories[]; +extern isc_log_t *isc_lctx; +extern isc_logmodule_t isc_modules[]; +/*@}*/ + +/*@{*/ +/*% + * Do not log directly to DEFAULT. Use another category. When in doubt, + * use GENERAL. + */ +#define ISC_LOGCATEGORY_DEFAULT (&isc_categories[0]) +#define ISC_LOGCATEGORY_GENERAL (&isc_categories[1]) +#define ISC_LOGCATEGORY_SSLKEYLOG (&isc_categories[2]) +/*@}*/ + +#define ISC_LOGMODULE_SOCKET (&isc_modules[0]) +#define ISC_LOGMODULE_TIME (&isc_modules[1]) +#define ISC_LOGMODULE_INTERFACE (&isc_modules[2]) +#define ISC_LOGMODULE_TIMER (&isc_modules[3]) +#define ISC_LOGMODULE_FILE (&isc_modules[4]) +#define ISC_LOGMODULE_NETMGR (&isc_modules[5]) +#define ISC_LOGMODULE_OTHER (&isc_modules[6]) + +ISC_LANG_BEGINDECLS + +void +isc_log_create(isc_mem_t *mctx, isc_log_t **lctxp, isc_logconfig_t **lcfgp); +/*%< + * Establish a new logging context, with default channels. + * + * Notes: + *\li isc_log_create() calls isc_logconfig_create(), so see its comment + * below for more information. + * + * Requires: + *\li mctx is a valid memory context. + *\li lctxp is not null and *lctxp is null. + *\li lcfgp is null or lcfgp is not null and *lcfgp is null. + * + * Ensures: + *\li *lctxp will point to a valid logging context if all of the necessary + * memory was allocated, or NULL otherwise. + *\li *lcfgp will point to a valid logging configuration if all of the + * necessary memory was allocated, or NULL otherwise. + *\li On failure, no additional memory is allocated. + */ + +void +isc_logconfig_create(isc_log_t *lctx, isc_logconfig_t **lcfgp); +/*%< + * Create the data structure that holds all of the configurable information + * about where messages are actually supposed to be sent -- the information + * that could changed based on some configuration file, as opposed to the + * the category/module specification of isc_log_[v]write[1] that is compiled + * into a program, or the debug_level which is dynamic state information. + * + * Notes: + *\li It is necessary to specify the logging context the configuration + * will be used with because the number of categories and modules + * needs to be known in order to set the configuration. However, + * the configuration is not used by the logging context until the + * isc_logconfig_use function is called. + * + *\li The memory context used for operations that allocate memory for + * the configuration is that of the logging context, as specified + * in the isc_log_create call. + * + *\li Four default channels are established: + *\verbatim + * default_syslog + * - log to syslog's daemon facility #ISC_LOG_INFO or higher + * default_stderr + * - log to stderr #ISC_LOG_INFO or higher + * default_debug + * - log to stderr #ISC_LOG_DEBUG dynamically + * null + * - log nothing + *\endverbatim + * + * Requires: + *\li lctx is a valid logging context. + *\li lcftp is not null and *lcfgp is null. + * + * Ensures: + *\li *lcfgp will point to a valid logging context if all of the necessary + * memory was allocated, or NULL otherwise. + *\li On failure, no additional memory is allocated. + */ + +void +isc_logconfig_use(isc_log_t *lctx, isc_logconfig_t *lcfg); +/*%< + * Associate a new configuration with a logging context. + * + * Notes: + *\li This is thread safe. The logging context will lock a mutex + * before attempting to swap in the new configuration, and isc_log_doit + * (the internal function used by all of isc_log_[v]write[1]) locks + * the same lock for the duration of its use of the configuration. + * + * Requires: + *\li lctx is a valid logging context. + *\li lcfg is a valid logging configuration. + *\li lctx is the same configuration given to isc_logconfig_create + * when the configuration was created. + * + * Ensures: + *\li Future calls to isc_log_write will use the new configuration. + */ + +void +isc_log_destroy(isc_log_t **lctxp); +/*%< + * Deallocate the memory associated with a logging context. + * + * Requires: + *\li *lctx is a valid logging context. + * + * Ensures: + *\li All of the memory associated with the logging context is returned + * to the free memory pool. + * + *\li Any open files are closed. + * + *\li The logging context is marked as invalid. + */ + +void +isc_logconfig_destroy(isc_logconfig_t **lcfgp); +/*%< + * Destroy a logging configuration. + * + * Requires: + *\li lcfgp is not null and *lcfgp is a valid logging configuration. + *\li The logging configuration is not in use by an existing logging context. + * + * Ensures: + *\li All memory allocated for the configuration is freed. + * + *\li The configuration is marked as invalid. + */ + +void +isc_log_registercategories(isc_log_t *lctx, isc_logcategory_t categories[]); +/*%< + * Identify logging categories a library will use. + * + * Notes: + *\li A category should only be registered once, but no mechanism enforces + * this rule. + * + *\li The end of the categories array is identified by a NULL name. + * + *\li Because the name is used by #ISC_LOG_PRINTCATEGORY, it should not + * be altered or destroyed after isc_log_registercategories(). + * + *\li Because each element of the categories array is used by + * isc_log_categorybyname, it should not be altered or destroyed + * after registration. + * + *\li The value of the id integer in each structure is overwritten + * by this function, and so id need not be initialized to any particular + * value prior to the function call. + * + *\li A subsequent call to isc_log_registercategories with the same + * logging context (but new categories) will cause the last + * element of the categories array from the prior call to have + * its "name" member changed from NULL to point to the new + * categories array, and its "id" member set to UINT_MAX. + * + * Requires: + *\li lctx is a valid logging context. + *\li categories != NULL. + *\li categories[0].name != NULL. + * + * Ensures: + * \li There are references to each category in the logging context, + * so they can be used with isc_log_usechannel() and isc_log_write(). + */ + +void +isc_log_registermodules(isc_log_t *lctx, isc_logmodule_t modules[]); +/*%< + * Identify logging categories a library will use. + * + * Notes: + *\li A module should only be registered once, but no mechanism enforces + * this rule. + * + *\li The end of the modules array is identified by a NULL name. + * + *\li Because the name is used by #ISC_LOG_PRINTMODULE, it should not + * be altered or destroyed after isc_log_registermodules(). + * + *\li Because each element of the modules array is used by + * isc_log_modulebyname, it should not be altered or destroyed + * after registration. + * + *\li The value of the id integer in each structure is overwritten + * by this function, and so id need not be initialized to any particular + * value prior to the function call. + * + *\li A subsequent call to isc_log_registermodules with the same + * logging context (but new modules) will cause the last + * element of the modules array from the prior call to have + * its "name" member changed from NULL to point to the new + * modules array, and its "id" member set to UINT_MAX. + * + * Requires: + *\li lctx is a valid logging context. + *\li modules != NULL. + *\li modules[0].name != NULL; + * + * Ensures: + *\li Each module has a reference in the logging context, so they can be + * used with isc_log_usechannel() and isc_log_write(). + */ + +void +isc_log_createchannel(isc_logconfig_t *lcfg, const char *name, + unsigned int type, int level, + const isc_logdestination_t *destination, + unsigned int flags); +/*%< + * Specify the parameters of a logging channel. + * + * Notes: + *\li The name argument is copied to memory in the logging context, so + * it can be altered or destroyed after isc_log_createchannel(). + * + *\li Defining a very large number of channels will have a performance + * impact on isc_log_usechannel(), since the names are searched + * linearly until a match is made. This same issue does not affect + * isc_log_write, however. + * + *\li Channel names can be redefined; this is primarily useful for programs + * that want their own definition of default_syslog, default_debug + * and default_stderr. + * + *\li Any channel that is redefined will not affect logging that was + * already directed to its original definition, _except_ for the + * default_stderr channel. This case is handled specially so that + * the default logging category can be changed by redefining + * default_stderr. (XXXDCL Though now that I think of it, the default + * logging category can be changed with only one additional function + * call by defining a new channel and then calling isc_log_usechannel() + * for #ISC_LOGCATEGORY_DEFAULT.) + * + *\li Specifying #ISC_LOG_PRINTTIME or #ISC_LOG_PRINTTAG for syslog is + * allowed, but probably not what you wanted to do. + * + * #ISC_LOG_DEBUGONLY will mark the channel as usable only when the + * debug level of the logging context (see isc_log_setdebuglevel) + * is non-zero. + * + * Requires: + *\li lcfg is a valid logging configuration. + * + *\li name is not NULL. + * + *\li type is #ISC_LOG_TOSYSLOG, #ISC_LOG_TOFILE, #ISC_LOG_TOFILEDESC or + * #ISC_LOG_TONULL. + * + *\li destination is not NULL unless type is #ISC_LOG_TONULL. + * + *\li level is >= #ISC_LOG_CRITICAL (the most negative logging level). + * + *\li flags does not include any bits aside from the ISC_LOG_PRINT* bits, + * #ISC_LOG_DEBUGONLY or #ISC_LOG_BUFFERED. + * + * Ensures: + *\li #ISC_R_SUCCESS + * A channel with the given name is usable with + * isc_log_usechannel(). + * + *\li #ISC_R_NOMEMORY or #ISC_R_UNEXPECTED + * No additional memory is being used by the logging context. + * Any channel that previously existed with the given name + * is not redefined. + */ + +isc_result_t +isc_log_usechannel(isc_logconfig_t *lcfg, const char *name, + const isc_logcategory_t *category, + const isc_logmodule_t *module); +/*%< + * Associate a named logging channel with a category and module that + * will use it. + * + * Notes: + *\li The name is searched for linearly in the set of known channel names + * until a match is found. (Note the performance impact of a very large + * number of named channels.) When multiple channels of the same + * name are defined, the most recent definition is found. + * + *\li Specifying a very large number of channels for a category will have + * a moderate impact on performance in isc_log_write(), as each + * call looks up the category for the start of a linked list, which + * it follows all the way to the end to find matching modules. The + * test for matching modules is integral, though. + * + *\li If category is NULL, then the channel is associated with the indicated + * module for all known categories (including the "default" category). + * + *\li If module is NULL, then the channel is associated with every module + * that uses that category. + * + *\li Passing both category and module as NULL would make every log message + * use the indicated channel. + * + * \li Specifying a channel that is #ISC_LOG_TONULL for a category/module pair + * has no effect on any other channels associated with that pair, + * regardless of ordering. Thus you cannot use it to "mask out" one + * category/module pair when you have specified some other channel that + * is also used by that category/module pair. + * + * Requires: + *\li lcfg is a valid logging configuration. + * + *\li category is NULL or has an id that is in the range of known ids. + * + * module is NULL or has an id that is in the range of known ids. + * + * Ensures: + *\li #ISC_R_SUCCESS + * The channel will be used by the indicated category/module + * arguments. + * + *\li #ISC_R_NOMEMORY + * If assignment for a specific category has been requested, + * the channel has not been associated with the indicated + * category/module arguments and no additional memory is + * used by the logging context. + * If assignment for all categories has been requested + * then _some_ may have succeeded (starting with category + * "default" and progressing through the order of categories + * passed to isc_log_registercategories()) and additional memory + * is being used by whatever assignments succeeded. + * + * Returns: + *\li #ISC_R_SUCCESS Success + *\li #ISC_R_NOMEMORY Resource limit: Out of memory + */ + +/* Attention: next four comments PRECEDE code */ +/*! + * \brief + * Write a message to the log channels. + * + * Notes: + *\li lctx can be NULL; this is allowed so that programs which use + * libraries that use the ISC logging system are not required to + * also use it. + * + *\li The format argument is a printf(3) string, with additional arguments + * as necessary. + * + * Requires: + *\li lctx is a valid logging context. + * + *\li The category and module arguments must have ids that are in the + * range of known ids, as established by isc_log_registercategories() + * and isc_log_registermodules(). + * + *\li level != #ISC_LOG_DYNAMIC. ISC_LOG_DYNAMIC is used only to define + * channels, and explicit debugging level must be identified for + * isc_log_write() via ISC_LOG_DEBUG(level). + * + *\li format != NULL. + * + * Ensures: + *\li The log message is written to every channel associated with the + * indicated category/module pair. + * + * Returns: + *\li Nothing. Failure to log a message is not construed as a + * meaningful error. + */ +void +isc_log_write(isc_log_t *lctx, isc_logcategory_t *category, + isc_logmodule_t *module, int level, const char *format, ...) + + ISC_FORMAT_PRINTF(5, 6); + +/*% + * Write a message to the log channels. + * + * Notes: + *\li lctx can be NULL; this is allowed so that programs which use + * libraries that use the ISC logging system are not required to + * also use it. + * + *\li The format argument is a printf(3) string, with additional arguments + * as necessary. + * + * Requires: + *\li lctx is a valid logging context. + * + *\li The category and module arguments must have ids that are in the + * range of known ids, as established by isc_log_registercategories() + * and isc_log_registermodules(). + * + *\li level != #ISC_LOG_DYNAMIC. ISC_LOG_DYNAMIC is used only to define + * channels, and explicit debugging level must be identified for + * isc_log_write() via ISC_LOG_DEBUG(level). + * + *\li format != NULL. + * + * Ensures: + *\li The log message is written to every channel associated with the + * indicated category/module pair. + * + * Returns: + *\li Nothing. Failure to log a message is not construed as a + * meaningful error. + */ +void +isc_log_vwrite(isc_log_t *lctx, isc_logcategory_t *category, + isc_logmodule_t *module, int level, const char *format, + va_list args) + + ISC_FORMAT_PRINTF(5, 0); + +/*% + * Write a message to the log channels, pruning duplicates that occur within + * a configurable amount of seconds (see isc_log_[sg]etduplicateinterval). + * This function is otherwise identical to isc_log_write(). + */ +void +isc_log_write1(isc_log_t *lctx, isc_logcategory_t *category, + isc_logmodule_t *module, int level, const char *format, ...) + + ISC_FORMAT_PRINTF(5, 6); + +/*% + * Write a message to the log channels, pruning duplicates that occur within + * a configurable amount of seconds (see isc_log_[sg]etduplicateinterval). + * This function is otherwise identical to isc_log_vwrite(). + */ +void +isc_log_vwrite1(isc_log_t *lctx, isc_logcategory_t *category, + isc_logmodule_t *module, int level, const char *format, + va_list args) + + ISC_FORMAT_PRINTF(5, 0); + +void +isc_log_setdebuglevel(isc_log_t *lctx, unsigned int level); +/*%< + * Set the debugging level used for logging. + * + * Notes: + *\li Setting the debugging level to 0 disables debugging log messages. + * + * Requires: + *\li lctx is a valid logging context. + * + * Ensures: + *\li The debugging level is set to the requested value. + */ + +unsigned int +isc_log_getdebuglevel(isc_log_t *lctx); +/*%< + * Get the current debugging level. + * + * Notes: + *\li This is provided so that a program can have a notion of + * "increment debugging level" or "decrement debugging level" + * without needing to keep track of what the current level is. + * + *\li A return value of 0 indicates that debugging messages are disabled. + * + * Requires: + *\li lctx is a valid logging context. + * + * Ensures: + *\li The current logging debugging level is returned. + */ + +bool +isc_log_wouldlog(isc_log_t *lctx, int level); +/*%< + * Determine whether logging something to 'lctx' at 'level' would + * actually cause something to be logged somewhere. + * + * If #false is returned, it is guaranteed that nothing would + * be logged, allowing the caller to omit unnecessary + * isc_log_write() calls and possible message preformatting. + */ + +void +isc_log_setduplicateinterval(isc_logconfig_t *lcfg, unsigned int interval); +/*%< + * Set the interval over which duplicate log messages will be ignored + * by isc_log_[v]write1(), in seconds. + * + * Notes: + *\li Increasing the duplicate interval from X to Y will not necessarily + * filter out duplicates of messages logged in Y - X seconds since the + * increase. (Example: Message1 is logged at midnight. Message2 + * is logged at 00:01:00, when the interval is only 30 seconds, causing + * Message1 to be expired from the log message history. Then the interval + * is increased to 3000 (five minutes) and at 00:04:00 Message1 is logged + * again. It will appear the second time even though less than five + * passed since the first occurrence. + * + * Requires: + *\li lctx is a valid logging context. + */ + +unsigned int +isc_log_getduplicateinterval(isc_logconfig_t *lcfg); +/*%< + * Get the current duplicate filtering interval. + * + * Requires: + *\li lctx is a valid logging context. + * + * Returns: + *\li The current duplicate filtering interval. + */ + +void +isc_log_settag(isc_logconfig_t *lcfg, const char *tag); +/*%< + * Set the program name or other identifier for #ISC_LOG_PRINTTAG. + * + * Requires: + *\li lcfg is a valid logging configuration. + * + * Notes: + *\li If this function has not set the tag to a non-NULL, non-empty value, + * then the #ISC_LOG_PRINTTAG channel flag will not print anything. + * Unlike some implementations of syslog on Unix systems, you *must* set + * the tag in order to get it logged. It is not implicitly derived from + * the program name (which is pretty impossible to infer portably). + * + *\li Setting the tag to NULL or the empty string will also cause the + * #ISC_LOG_PRINTTAG channel flag to not print anything. If tag equals the + * empty string, calls to isc_log_gettag will return NULL. + * + * XXXDCL when creating a new isc_logconfig_t, it might be nice if the tag + * of the currently active isc_logconfig_t was inherited. this does not + * currently happen. + */ + +char * +isc_log_gettag(isc_logconfig_t *lcfg); +/*%< + * Get the current identifier printed with #ISC_LOG_PRINTTAG. + * + * Requires: + *\li lcfg is a valid logging configuration. + * + * Notes: + *\li Since isc_log_settag() will not associate a zero-length string + * with the logging configuration, attempts to do so will cause + * this function to return NULL. However, a determined programmer + * will observe that (currently) a tag of length greater than zero + * could be set, and then modified to be zero length. + * + * Returns: + *\li A pointer to the current identifier, or NULL if none has been set. + */ + +void +isc_log_opensyslog(const char *tag, int options, int facility); +/*%< + * Initialize syslog logging. + * + * Notes: + *\li XXXDCL NT + * This is currently equivalent to openlog(), but is not going to remain + * that way. In the meantime, the arguments are all identical to + * those used by openlog(3), as follows: + * + * \code + * tag: The string to use in the position of the program + * name in syslog messages. Most (all?) syslogs + * will use basename(argv[0]) if tag is NULL. + * + * options: LOG_CONS, LOG_PID, LOG_NDELAY ... whatever your + * syslog supports. + * + * facility: The default syslog facility. This is irrelevant + * since isc_log_write will ALWAYS use the channel's + * declared facility. + * \endcode + * + *\li Zero effort has been made (yet) to accommodate systems with openlog() + * that only takes two arguments, or to identify valid syslog + * facilities or options for any given architecture. + * + *\li It is necessary to call isc_log_opensyslog() to initialize + * syslogging on machines which do not support network connections to + * syslogd because they require a Unix domain socket to be used. Since + * this is a chore to determine at run-time, it is suggested that it + * always be called by programs using the ISC logging system. + * + * Requires: + *\li Nothing. + * + * Ensures: + *\li openlog() is called to initialize the syslog system. + */ + +void +isc_log_closefilelogs(isc_log_t *lctx); +/*%< + * Close all open files used by #ISC_LOG_TOFILE channels. + * + * Notes: + *\li This function is provided for programs that want to use their own + * log rolling mechanism rather than the one provided internally. + * For example, a program that wanted to keep daily logs would define + * a channel which used #ISC_LOG_ROLLNEVER, then once a day would + * rename the log file and call isc_log_closefilelogs(). + * + *\li #ISC_LOG_TOFILEDESC channels are unaffected. + * + * Requires: + *\li lctx is a valid context. + * + * Ensures: + *\li The open files are closed and will be reopened when they are + * next needed. + */ + +isc_logcategory_t * +isc_log_categorybyname(isc_log_t *lctx, const char *name); +/*%< + * Find a category by its name. + * + * Notes: + *\li The string name of a category is not required to be unique. + * + * Requires: + *\li lctx is a valid context. + *\li name is not NULL. + * + * Returns: + *\li A pointer to the _first_ isc_logcategory_t structure used by "name". + * + *\li NULL if no category exists by that name. + */ + +isc_logmodule_t * +isc_log_modulebyname(isc_log_t *lctx, const char *name); +/*%< + * Find a module by its name. + * + * Notes: + *\li The string name of a module is not required to be unique. + * + * Requires: + *\li lctx is a valid context. + *\li name is not NULL. + * + * Returns: + *\li A pointer to the _first_ isc_logmodule_t structure used by "name". + * + *\li NULL if no module exists by that name. + */ + +void +isc_log_setcontext(isc_log_t *lctx); +/*%< + * Sets the context used by the libisc for logging. + * + * Requires: + *\li lctx be a valid context. + */ + +isc_result_t +isc_logfile_roll(isc_logfile_t *file); +/*%< + * Roll a logfile. + * + * Requires: + *\li file is not NULL. + */ + +void +isc_log_setforcelog(bool v); +/*%< + * Turn forced logging on/off for the current thread. This can be used to + * temporarily increase the debug level to maximum for the duration of + * a single task event. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/magic.h b/lib/isc/include/isc/magic.h new file mode 100644 index 0000000..5e2f184 --- /dev/null +++ b/lib/isc/include/isc/magic.h @@ -0,0 +1,31 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/magic.h */ + +typedef struct { + unsigned int magic; +} isc__magic_t; + +/*% + * To use this macro the magic number MUST be the first thing in the + * structure, and MUST be of type "unsigned int". + * The intent of this is to allow magic numbers to be checked even though + * the object is otherwise opaque. + */ +#define ISC_MAGIC_VALID(a, b) \ + ((a) != NULL && ((const isc__magic_t *)(a))->magic == (b)) + +#define ISC_MAGIC(a, b, c, d) ((a) << 24 | (b) << 16 | (c) << 8 | (d)) diff --git a/lib/isc/include/isc/managers.h b/lib/isc/include/isc/managers.h new file mode 100644 index 0000000..774ed30 --- /dev/null +++ b/lib/isc/include/isc/managers.h @@ -0,0 +1,30 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#include <isc/netmgr.h> +#include <isc/result.h> +#include <isc/task.h> +#include <isc/timer.h> + +typedef struct isc_managers isc_managers_t; + +isc_result_t +isc_managers_create(isc_mem_t *mctx, size_t workers, size_t quantum, + isc_nm_t **netmgrp, isc_taskmgr_t **taskmgrp, + isc_timermgr_t **timermgrp); + +void +isc_managers_destroy(isc_nm_t **netmgrp, isc_taskmgr_t **taskmgrp, + isc_timermgr_t **timermgrp); diff --git a/lib/isc/include/isc/md.h b/lib/isc/include/isc/md.h new file mode 100644 index 0000000..f52424b --- /dev/null +++ b/lib/isc/include/isc/md.h @@ -0,0 +1,204 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +/*! + * \file isc/md.h + * \brief This is the header file for message digest algorithms. + */ + +#pragma once + +#include <isc/lang.h> +#include <isc/result.h> +#include <isc/types.h> + +typedef void isc_md_t; + +/** + * isc_md_type_t: + * @ISC_MD_MD5: MD5 + * @ISC_MD_SHA1: SHA-1 + * @ISC_MD_SHA224: SHA-224 + * @ISC_MD_SHA256: SHA-256 + * @ISC_MD_SHA384: SHA-384 + * @ISC_MD_SHA512: SHA-512 + * + * Enumeration of supported message digest algorithms. + */ +typedef void isc_md_type_t; + +#define ISC_MD_MD5 isc__md_md5() +#define ISC_MD_SHA1 isc__md_sha1() +#define ISC_MD_SHA224 isc__md_sha224() +#define ISC_MD_SHA256 isc__md_sha256() +#define ISC_MD_SHA384 isc__md_sha384() +#define ISC_MD_SHA512 isc__md_sha512() + +const isc_md_type_t * +isc__md_md5(void); +const isc_md_type_t * +isc__md_sha1(void); +const isc_md_type_t * +isc__md_sha224(void); +const isc_md_type_t * +isc__md_sha256(void); +const isc_md_type_t * +isc__md_sha384(void); +const isc_md_type_t * +isc__md_sha512(void); + +#define ISC_MD5_DIGESTLENGTH isc_md_type_get_size(ISC_MD_MD5) +#define ISC_MD5_BLOCK_LENGTH isc_md_type_get_block_size(ISC_MD_MD5) +#define ISC_SHA1_DIGESTLENGTH isc_md_type_get_size(ISC_MD_SHA1) +#define ISC_SHA1_BLOCK_LENGTH isc_md_type_get_block_size(ISC_MD_SHA1) +#define ISC_SHA224_DIGESTLENGTH isc_md_type_get_size(ISC_MD_SHA224) +#define ISC_SHA224_BLOCK_LENGTH isc_md_type_get_block_size(ISC_MD_SHA224) +#define ISC_SHA256_DIGESTLENGTH isc_md_type_get_size(ISC_MD_SHA256) +#define ISC_SHA256_BLOCK_LENGTH isc_md_type_get_block_size(ISC_MD_SHA256) +#define ISC_SHA384_DIGESTLENGTH isc_md_type_get_size(ISC_MD_SHA384) +#define ISC_SHA384_BLOCK_LENGTH isc_md_type_get_block_size(ISC_MD_SHA384) +#define ISC_SHA512_DIGESTLENGTH isc_md_type_get_size(ISC_MD_SHA512) +#define ISC_SHA512_BLOCK_LENGTH isc_md_type_get_block_size(ISC_MD_SHA512) + +#define ISC_MAX_MD_SIZE 64U /* EVP_MAX_MD_SIZE */ +#define ISC_MAX_BLOCK_SIZE 128U /* ISC_SHA512_BLOCK_LENGTH */ + +/** + * isc_md: + * @type: the digest type + * @buf: the data to hash + * @len: the length of the data to hash + * @digest: the output buffer + * @digestlen: the length of the data written to @digest + * + * This function hashes @len bytes of data at @buf and places the result in + * @digest. If the @digestlen parameter is not NULL then the number of bytes of + * data written (i.e. the length of the digest) will be written to the integer + * at @digestlen, at most ISC_MAX_MD_SIZE bytes will be written. + */ +isc_result_t +isc_md(const isc_md_type_t *type, const unsigned char *buf, const size_t len, + unsigned char *digest, unsigned int *digestlen); + +/** + * isc_md_new: + * + * This function allocates, initializes and returns a digest context. + */ +isc_md_t * +isc_md_new(void); + +/** + * isc_md_free: + * @md: message digest context + * + * This function cleans up digest context ctx and frees up the space allocated + * to it. + */ +void +isc_md_free(isc_md_t *); + +/** + * isc_md_init: + * @md: message digest context + * @type: digest type + * + * This function sets up digest context @md to use a digest @type. @md must be + * initialized before calling this function. + */ +isc_result_t +isc_md_init(isc_md_t *, const isc_md_type_t *md_type); + +/** + * isc_md_reset: + * @md: message digest context + * + * This function resets the digest context ctx. This can be used to reuse an + * already existing context. + */ +isc_result_t +isc_md_reset(isc_md_t *md); + +/** + * isc_md_update: + * @md: message digest context + * @buf: data to hash + * @len: length of the data to hash + * + * This function hashes @len bytes of data at @buf into the digest context @md. + * This function can be called several times on the same @md to hash additional + * data. + */ +isc_result_t +isc_md_update(isc_md_t *md, const unsigned char *buf, const size_t len); + +/** + * isc_md_final: + * @md: message digest context + * @digest: the output buffer + * @digestlen: the length of the data written to @digest + * + * This function retrieves the digest value from @md and places it in @digest. + * If the @digestlen parameter is not NULL then the number of bytes of data + * written (i.e. the length of the digest) will be written to the integer at + * @digestlen, at most ISC_MAX_MD_SIZE bytes will be written. After calling + * this function no additional calls to isc_md_update() can be made. + */ +isc_result_t +isc_md_final(isc_md_t *md, unsigned char *digest, unsigned int *digestlen); + +/** + * isc_md_get_type: + * @md: message digest contezt + * + * This function return the isc_md_type_t previously set for the supplied + * message digest context or NULL if no isc_md_type_t has been set. + */ +const isc_md_type_t * +isc_md_get_md_type(isc_md_t *md); + +/** + * isc_md_size: + * + * This function return the size of the message digest when passed an isc_md_t + * structure, i.e. the size of the hash. + */ +size_t +isc_md_get_size(isc_md_t *md); + +/** + * isc_md_block_size: + * + * This function return the block size of the message digest when passed an + * isc_md_t structure. + */ +size_t +isc_md_get_block_size(isc_md_t *md); + +/** + * isc_md_size: + * + * This function return the size of the message digest when passed an + * isc_md_type_t , i.e. the size of the hash. + */ +size_t +isc_md_type_get_size(const isc_md_type_t *md_type); + +/** + * isc_md_block_size: + * + * This function return the block size of the message digest when passed an + * isc_md_type_t. + */ +size_t +isc_md_type_get_block_size(const isc_md_type_t *md_type); diff --git a/lib/isc/include/isc/mem.h b/lib/isc/include/isc/mem.h new file mode 100644 index 0000000..bd59f73 --- /dev/null +++ b/lib/isc/include/isc/mem.h @@ -0,0 +1,572 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/mem.h */ + +#include <stdbool.h> +#include <stdio.h> + +#include <isc/attributes.h> +#include <isc/lang.h> +#include <isc/mutex.h> +#include <isc/types.h> + +ISC_LANG_BEGINDECLS + +#define ISC_MEM_LOWATER 0 +#define ISC_MEM_HIWATER 1 +typedef void (*isc_mem_water_t)(void *, int); + +/*% + * Define ISC_MEM_TRACKLINES=1 to turn on detailed tracing of memory + * allocation and freeing by file and line number. + */ +#ifndef ISC_MEM_TRACKLINES +#define ISC_MEM_TRACKLINES 0 +#endif /* ifndef ISC_MEM_TRACKLINES */ + +extern unsigned int isc_mem_debugging; +extern unsigned int isc_mem_defaultflags; + +/*@{*/ +#define ISC_MEM_DEBUGTRACE 0x00000001U +#define ISC_MEM_DEBUGRECORD 0x00000002U +#define ISC_MEM_DEBUGUSAGE 0x00000004U +#define ISC_MEM_DEBUGALL 0x0000001FU +/*!< + * The variable isc_mem_debugging holds a set of flags for + * turning certain memory debugging options on or off at + * runtime. It is initialized to the value ISC_MEM_DEGBUGGING, + * which is 0 by default but may be overridden at compile time. + * The following flags can be specified: + * + * \li #ISC_MEM_DEBUGTRACE + * Log each allocation and free to isc_lctx. + * + * \li #ISC_MEM_DEBUGRECORD + * Remember each allocation, and match them up on free. + * Crash if a free doesn't match an allocation. + * + * \li #ISC_MEM_DEBUGUSAGE + * If a hi_water mark is set, print the maximum inuse memory + * every time it is raised once it exceeds the hi_water mark. + */ +/*@}*/ + +#if ISC_MEM_TRACKLINES +#define _ISC_MEM_FILELINE , __FILE__, __LINE__ +#define _ISC_MEM_FLARG , const char *, unsigned int +#else /* if ISC_MEM_TRACKLINES */ +#define _ISC_MEM_FILELINE +#define _ISC_MEM_FLARG +#endif /* if ISC_MEM_TRACKLINES */ + +/* + * Flags for isc_mem_create() calls. + */ +#define ISC_MEMFLAG_RESERVED1 0x00000001 /* reserved, obsoleted, don't use */ +#define ISC_MEMFLAG_RESERVED2 0x00000002 /* reserved, obsoleted, don't use */ +#define ISC_MEMFLAG_FILL \ + 0x00000004 /* fill with pattern after alloc and frees */ + +/*% + * Define ISC_MEM_DEFAULTFILL=1 to turn filling the memory with pattern + * after alloc and free. + */ +#if ISC_MEM_DEFAULTFILL +#define ISC_MEMFLAG_DEFAULT ISC_MEMFLAG_FILL +#else /* if !ISC_MEM_USE_INTERNAL_MALLOC */ +#define ISC_MEMFLAG_DEFAULT 0 +#endif /* if !ISC_MEM_USE_INTERNAL_MALLOC */ + +/*% + * isc_mem_putanddetach() is a convenience function for use where you + * have a structure with an attached memory context. + * + * Given: + * + * \code + * struct { + * ... + * isc_mem_t *mctx; + * ... + * } *ptr; + * + * isc_mem_t *mctx; + * + * isc_mem_putanddetach(&ptr->mctx, ptr, sizeof(*ptr)); + * \endcode + * + * is the equivalent of: + * + * \code + * mctx = NULL; + * isc_mem_attach(ptr->mctx, &mctx); + * isc_mem_detach(&ptr->mctx); + * isc_mem_put(mctx, ptr, sizeof(*ptr)); + * isc_mem_detach(&mctx); + * \endcode + */ + +/*% + * These functions are actually implemented in isc__mem_<function> + * (two underscores). The single-underscore macros are used to pass + * __FILE__ and __LINE__, and in the case of the put functions, to + * set the pointer being freed to NULL in the calling function. + * + * Many of these functions have a further isc___mem_<function> + * (three underscores) implementation, which is called indirectly + * via the isc_memmethods structure in the mctx so that dynamically + * loaded modules can use them even if named is statically linked. + */ + +#define ISCMEMFUNC(sfx) isc__mem_##sfx +#define ISCMEMPOOLFUNC(sfx) isc__mempool_##sfx + +#define isc_mem_get(c, s) ISCMEMFUNC(get)((c), (s), 0 _ISC_MEM_FILELINE) +#define isc_mem_get_aligned(c, s, a) \ + ISCMEMFUNC(get)((c), (s), (a)_ISC_MEM_FILELINE) +#define isc_mem_reget(c, p, o, n) \ + ISCMEMFUNC(reget)((c), (p), (o), (n), 0 _ISC_MEM_FILELINE) +#define isc_mem_reget_aligned(c, p, o, n, a) \ + ISCMEMFUNC(reget)((c), (p), (o), (n), (a)_ISC_MEM_FILELINE) +#define isc_mem_allocate(c, s) ISCMEMFUNC(allocate)((c), (s)_ISC_MEM_FILELINE) +#define isc_mem_reallocate(c, p, s) \ + ISCMEMFUNC(reallocate)((c), (p), (s)_ISC_MEM_FILELINE) +#define isc_mem_strdup(c, p) ISCMEMFUNC(strdup)((c), (p)_ISC_MEM_FILELINE) +#define isc_mem_strndup(c, p, l) \ + ISCMEMFUNC(strndup)((c), (p), (l)_ISC_MEM_FILELINE) +#define isc_mempool_get(c) ISCMEMPOOLFUNC(get)((c)_ISC_MEM_FILELINE) + +#define isc_mem_put(c, p, s) \ + do { \ + ISCMEMFUNC(put)((c), (p), (s), 0 _ISC_MEM_FILELINE); \ + (p) = NULL; \ + } while (0) +#define isc_mem_put_aligned(c, p, s, a) \ + do { \ + ISCMEMFUNC(put) \ + ((c), (p), (s), (a)_ISC_MEM_FILELINE); \ + (p) = NULL; \ + } while (0) +#define isc_mem_putanddetach(c, p, s) \ + do { \ + ISCMEMFUNC(putanddetach)((c), (p), (s), 0 _ISC_MEM_FILELINE); \ + (p) = NULL; \ + } while (0) +#define isc_mem_putanddetach_aligned(c, p, s, a) \ + do { \ + ISCMEMFUNC(putanddetach) \ + ((c), (p), (s), (a)_ISC_MEM_FILELINE); \ + (p) = NULL; \ + } while (0) +#define isc_mem_free(c, p) \ + do { \ + ISCMEMFUNC(free)((c), (p)_ISC_MEM_FILELINE); \ + (p) = NULL; \ + } while (0) +#define isc_mempool_put(c, p) \ + do { \ + ISCMEMPOOLFUNC(put)((c), (p)_ISC_MEM_FILELINE); \ + (p) = NULL; \ + } while (0) + +/*@{*/ +#define isc_mem_create(cp) ISCMEMFUNC(create)((cp)_ISC_MEM_FILELINE) +void ISCMEMFUNC(create)(isc_mem_t **_ISC_MEM_FLARG); + +/*!< + * \brief Create a memory context. + * + * Requires: + * mctxp != NULL && *mctxp == NULL */ +/*@}*/ + +#define isc_mem_create_arena(cp) isc__mem_create_arena((cp)_ISC_MEM_FILELINE) +void +isc__mem_create_arena(isc_mem_t **_ISC_MEM_FLARG); +/*!< + * \brief Create a memory context that routs all its operations to a + * dedicated jemalloc arena (when available). When jemalloc is not + * available, the function is, effectively, an alias to + * isc_mem_create(). + * + * Requires: + * mctxp != NULL && *mctxp == NULL */ +/*@}*/ + +isc_result_t +isc_mem_arena_set_muzzy_decay_ms(isc_mem_t *mctx, const ssize_t decay_ms); + +isc_result_t +isc_mem_arena_set_dirty_decay_ms(isc_mem_t *mctx, const ssize_t decay_ms); +/*!< + * \brief These two functions set the given parameters on the + * jemalloc arena associated with the memory context (if there is + * one). When jemalloc is not available, these are no-op. + * + * NOTE: The "muzzy_decay_ms" and "dirty_decay_ms" are the most common + * parameters to adjust when the defaults do not work well (per the + * official jemalloc tuning guide: + * https://github.com/jemalloc/jemalloc/blob/dev/TUNING.md). + * + * Requires: + * mctx - a valid memory context. + */ +/*@}*/ + +void +isc_mem_attach(isc_mem_t *, isc_mem_t **); + +/*@{*/ +void +isc_mem_attach(isc_mem_t *, isc_mem_t **); +#define isc_mem_detach(cp) ISCMEMFUNC(detach)((cp)_ISC_MEM_FILELINE) +void ISCMEMFUNC(detach)(isc_mem_t **_ISC_MEM_FLARG); +/*!< + * \brief Attach to / detach from a memory context. + * + * This is intended for applications that use multiple memory contexts + * in such a way that it is not obvious when the last allocations from + * a given context has been freed and destroying the context is safe. + * + * Most applications do not need to call these functions as they can + * simply create a single memory context at the beginning of main() + * and destroy it at the end of main(), thereby guaranteeing that it + * is not destroyed while there are outstanding allocations. + */ +/*@}*/ + +#define isc_mem_destroy(cp) ISCMEMFUNC(destroy)((cp)_ISC_MEM_FILELINE) +void ISCMEMFUNC(destroy)(isc_mem_t **_ISC_MEM_FLARG); +/*%< + * Destroy a memory context. + */ + +void +isc_mem_stats(isc_mem_t *mctx, FILE *out); +/*%< + * Print memory usage statistics for 'mctx' on the stream 'out'. + */ + +void +isc_mem_setdestroycheck(isc_mem_t *mctx, bool on); +/*%< + * If 'on' is true, 'mctx' will check for memory leaks when + * destroyed and abort the program if any are present. + */ + +size_t +isc_mem_inuse(isc_mem_t *mctx); +/*%< + * Get an estimate of the amount of memory in use in 'mctx', in bytes. + * This includes quantization overhead, but does not include memory + * allocated from the system but not yet used. + */ + +size_t +isc_mem_maxinuse(isc_mem_t *mctx); +/*%< + * Get an estimate of the largest amount of memory that has been in + * use in 'mctx' at any time. + */ + +size_t +isc_mem_total(isc_mem_t *mctx); +/*%< + * Get the total amount of memory in 'mctx', in bytes, including memory + * not yet used. + */ + +size_t +isc_mem_malloced(isc_mem_t *ctx); +/*%< + * Get an estimate of the amount of memory allocated in 'mctx', in bytes. + */ + +size_t +isc_mem_maxmalloced(isc_mem_t *ctx); +/*%< + * Get an estimate of the largest amount of memory that has been + * allocated in 'mctx' at any time. + */ + +bool +isc_mem_isovermem(isc_mem_t *mctx); +/*%< + * Return true iff the memory context is in "over memory" state, i.e., + * a hiwater mark has been set and the used amount of memory has exceeds + * the mark. + */ + +void +isc_mem_clearwater(isc_mem_t *mctx); +void +isc_mem_setwater(isc_mem_t *mctx, isc_mem_water_t water, void *water_arg, + size_t hiwater, size_t lowater); +/*%< + * Set high and low water marks for this memory context. + * + * When the memory usage of 'mctx' exceeds 'hiwater', + * '(water)(water_arg, #ISC_MEM_HIWATER)' will be called. 'water' needs + * to call isc_mem_waterack() with #ISC_MEM_HIWATER to acknowledge the + * state change. 'water' may be called multiple times. + * + * When the usage drops below 'lowater', 'water' will again be called, + * this time with #ISC_MEM_LOWATER. 'water' need to calls + * isc_mem_waterack() with #ISC_MEM_LOWATER to acknowledge the change. + * + * static void + * water(void *arg, int mark) { + * struct foo *foo = arg; + * + * LOCK(&foo->marklock); + * if (foo->mark != mark) { + * foo->mark = mark; + * .... + * isc_mem_waterack(foo->mctx, mark); + * } + * UNLOCK(&foo->marklock); + * } + * + * if 'water' is set to NULL, the 'hiwater' and 'lowater' must set to 0, and + * high- and low-water processing are disabled for this memory context. There's + * a convenient function isc_mem_clearwater(). + * + * Requires: + * + *\li If 'water' is NULL, 'hiwater' and 'lowater' must be set to 0. + *\li If 'water' and 'water_arg' have previously been set, they are + unchanged. + *\li 'hiwater' >= 'lowater' + */ + +void +isc_mem_waterack(isc_mem_t *ctx, int mark); +/*%< + * Called to acknowledge changes in signaled by calls to 'water'. + */ + +void +isc_mem_checkdestroyed(FILE *file); +/*%< + * Check that all memory contexts have been destroyed. + * Prints out those that have not been. + * Fatally fails if there are still active contexts. + */ + +unsigned int +isc_mem_references(isc_mem_t *ctx); +/*%< + * Return the current reference count. + */ + +void +isc_mem_setname(isc_mem_t *ctx, const char *name); +/*%< + * Name 'ctx'. + * + * Notes: + * + *\li Only the first 15 characters of 'name' will be copied. + * + * Requires: + * + *\li 'ctx' is a valid ctx. + */ + +const char * +isc_mem_getname(isc_mem_t *ctx); +/*%< + * Get the name of 'ctx', as previously set using isc_mem_setname(). + * + * Requires: + *\li 'ctx' is a valid ctx. + * + * Returns: + *\li A non-NULL pointer to a null-terminated string. + * If the ctx has not been named, the string is + * empty. + */ + +#ifdef HAVE_LIBXML2 +int +isc_mem_renderxml(void *writer0); +/*%< + * Render all contexts' statistics and status in XML for writer. + */ +#endif /* HAVE_LIBXML2 */ + +#ifdef HAVE_JSON_C +isc_result_t +isc_mem_renderjson(void *memobj0); +/*%< + * Render all contexts' statistics and status in JSON. + */ +#endif /* HAVE_JSON_C */ + +/* + * Memory pools + */ + +#define isc_mempool_create(c, s, mp) \ + isc__mempool_create((c), (s), (mp)_ISC_MEM_FILELINE) +void +isc__mempool_create(isc_mem_t *restrict mctx, const size_t element_size, + isc_mempool_t **mpctxp _ISC_MEM_FLARG); +/*%< + * Create a memory pool. + * + * Requires: + *\li mctx is a valid memory context. + *\li size > 0 + *\li mpctxp != NULL and *mpctxp == NULL + * + * Defaults: + *\li freemax = 1 + *\li fillcount = 1 + * + * Returns: + *\li #ISC_R_NOMEMORY -- not enough memory to create pool + *\li #ISC_R_SUCCESS -- all is well. + */ + +#define isc_mempool_destroy(mp) isc__mempool_destroy((mp)_ISC_MEM_FILELINE) +void +isc__mempool_destroy(isc_mempool_t **restrict mpctxp _ISC_MEM_FLARG); +/*%< + * Destroy a memory pool. + * + * Requires: + *\li mpctxp != NULL && *mpctxp is a valid pool. + *\li The pool has no un"put" allocations outstanding + */ + +void +isc_mempool_setname(isc_mempool_t *restrict mpctx, const char *name); +/*%< + * Associate a name with a memory pool. At most 15 characters may be + *used. + * + * Requires: + *\li mpctx is a valid pool. + *\li name != NULL; + */ + +/* + * The following functions get/set various parameters. Note that due to + * the unlocked nature of pools these are potentially random values + *unless the imposed externally provided locking protocols are followed. + * + * Also note that the quota limits will not always take immediate + * effect. + * + * All functions require (in addition to other requirements): + * mpctx is a valid memory pool + */ + +unsigned int +isc_mempool_getfreemax(isc_mempool_t *restrict mpctx); +/*%< + * Returns the maximum allowed size of the free list. + */ + +void +isc_mempool_setfreemax(isc_mempool_t *restrict mpctx, const unsigned int limit); +/*%< + * Sets the maximum allowed size of the free list. + */ + +unsigned int +isc_mempool_getfreecount(isc_mempool_t *restrict mpctx); +/*%< + * Returns current size of the free list. + */ + +unsigned int +isc_mempool_getallocated(isc_mempool_t *restrict mpctx); +/*%< + * Returns the number of items allocated from this pool. + */ + +unsigned int +isc_mempool_getfillcount(isc_mempool_t *restrict mpctx); +/*%< + * Returns the number of items allocated as a block from the parent + * memory context when the free list is empty. + */ + +void +isc_mempool_setfillcount(isc_mempool_t *restrict mpctx, + const unsigned int limit); +/*%< + * Sets the fillcount. + * + * Additional requirements: + *\li limit > 0 + */ + +#if defined(UNIT_TESTING) && defined(malloc) +/* + * cmocka.h redefined malloc as a macro, we #undef it + * to avoid replacing ISC_ATTR_MALLOC with garbage. + */ +#pragma push_macro("malloc") +#undef malloc +#define POP_MALLOC_MACRO 1 +#endif + +/* + * Pseudo-private functions for use via macros. Do not call directly. + */ +void ISCMEMFUNC(putanddetach)(isc_mem_t **, void *, size_t, + size_t _ISC_MEM_FLARG); +void ISCMEMFUNC(put)(isc_mem_t *, void *, size_t, size_t _ISC_MEM_FLARG); +void ISCMEMFUNC(free)(isc_mem_t *, void *_ISC_MEM_FLARG); + +ISC_ATTR_MALLOC_DEALLOCATOR_IDX(ISCMEMFUNC(put), 2) +void *ISCMEMFUNC(get)(isc_mem_t *, size_t, size_t _ISC_MEM_FLARG); + +ISC_ATTR_DEALLOCATOR_IDX(ISCMEMFUNC(put), 2) +void *ISCMEMFUNC(reget)(isc_mem_t *, void *, size_t, size_t, + size_t _ISC_MEM_FLARG); + +ISC_ATTR_MALLOC_DEALLOCATOR_IDX(ISCMEMFUNC(free), 2) +void *ISCMEMFUNC(allocate)(isc_mem_t *, size_t _ISC_MEM_FLARG); + +ISC_ATTR_DEALLOCATOR_IDX(ISCMEMFUNC(free), 2) +void *ISCMEMFUNC(reallocate)(isc_mem_t *, void *, size_t _ISC_MEM_FLARG); + +ISC_ATTR_RETURNS_NONNULL +ISC_ATTR_MALLOC_DEALLOCATOR_IDX(ISCMEMFUNC(free), 2) +char *ISCMEMFUNC(strdup)(isc_mem_t *, const char *_ISC_MEM_FLARG); + +ISC_ATTR_RETURNS_NONNULL +ISC_ATTR_MALLOC_DEALLOCATOR_IDX(ISCMEMFUNC(free), 2) +char *ISCMEMFUNC(strndup)(isc_mem_t *, const char *, size_t _ISC_MEM_FLARG); + +ISC_ATTR_MALLOC_DEALLOCATOR_IDX(ISCMEMPOOLFUNC(put), 2) +void *ISCMEMPOOLFUNC(get)(isc_mempool_t *_ISC_MEM_FLARG); + +void ISCMEMPOOLFUNC(put)(isc_mempool_t *, void *_ISC_MEM_FLARG); + +#ifdef POP_MALLOC_MACRO +/* + * Restore cmocka.h macro for malloc. + */ +#pragma pop_macro("malloc") +#endif + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/meminfo.h b/lib/isc/include/isc/meminfo.h new file mode 100644 index 0000000..fc39e26 --- /dev/null +++ b/lib/isc/include/isc/meminfo.h @@ -0,0 +1,30 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#include <inttypes.h> + +#include <isc/lang.h> +#include <isc/types.h> + +ISC_LANG_BEGINDECLS + +uint64_t +isc_meminfo_totalphys(void); +/*%< + * Return total available physical memory in bytes, or 0 if this cannot + * be determined + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/mutex.h b/lib/isc/include/isc/mutex.h new file mode 100644 index 0000000..b794216 --- /dev/null +++ b/lib/isc/include/isc/mutex.h @@ -0,0 +1,50 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file */ + +#include <pthread.h> +#include <stdio.h> + +#include <isc/lang.h> +#include <isc/result.h> /* for ISC_R_ codes */ + +ISC_LANG_BEGINDECLS + +typedef pthread_mutex_t isc_mutex_t; + +int +isc__mutex_init(isc_mutex_t *mp); + +#define isc_mutex_init(mp) \ + do { \ + int _err = isc__mutex_init((mp)); \ + if (_err != 0) { \ + FATAL_SYSERROR(_err, "pthread_mutex_init()"); \ + } \ + } while (0) + +#define isc_mutex_lock(mp) \ + ((pthread_mutex_lock((mp)) == 0) ? ISC_R_SUCCESS : ISC_R_UNEXPECTED) + +#define isc_mutex_unlock(mp) \ + ((pthread_mutex_unlock((mp)) == 0) ? ISC_R_SUCCESS : ISC_R_UNEXPECTED) + +#define isc_mutex_trylock(mp) \ + ((pthread_mutex_trylock((mp)) == 0) ? ISC_R_SUCCESS : ISC_R_LOCKBUSY) + +#define isc_mutex_destroy(mp) RUNTIME_CHECK(pthread_mutex_destroy((mp)) == 0) + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/mutexblock.h b/lib/isc/include/isc/mutexblock.h new file mode 100644 index 0000000..f5f2e32 --- /dev/null +++ b/lib/isc/include/isc/mutexblock.h @@ -0,0 +1,54 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/mutexblock.h */ + +#include <isc/lang.h> +#include <isc/mutex.h> +#include <isc/types.h> + +ISC_LANG_BEGINDECLS + +void +isc_mutexblock_init(isc_mutex_t *block, unsigned int count); +/*%< + * Initialize a block of locks. If an error occurs all initialized locks + * will be destroyed, if possible. + * + * Requires: + * + *\li block != NULL + * + *\li count > 0 + * + */ + +void +isc_mutexblock_destroy(isc_mutex_t *block, unsigned int count); +/*%< + * Destroy a block of locks. + * + * Requires: + * + *\li block != NULL + * + *\li count > 0 + * + *\li Each lock in the block be initialized via isc_mutex_init() or + * the whole block was initialized via isc_mutex_initblock(). + * + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/net.h b/lib/isc/include/isc/net.h new file mode 100644 index 0000000..1a3ce63 --- /dev/null +++ b/lib/isc/include/isc/net.h @@ -0,0 +1,292 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/***** +***** Module Info +*****/ + +/*! \file + * \brief + * Basic Networking Types + * + * This module is responsible for defining the following basic networking + * types: + * + *\li struct in_addr + *\li struct in6_addr + *\li struct in6_pktinfo + *\li struct sockaddr + *\li struct sockaddr_in + *\li struct sockaddr_in6 + *\li struct sockaddr_storage + *\li in_port_t + * + * It ensures that the AF_ and PF_ macros are defined. + * + * It declares ntoh[sl]() and hton[sl](). + * + * It declares inet_ntop(), and inet_pton(). + * + * It ensures that #INADDR_LOOPBACK, #INADDR_ANY, #IN6ADDR_ANY_INIT, + * IN6ADDR_V4MAPPED_INIT, in6addr_any, and in6addr_loopback are available. + * + * It ensures that IN_MULTICAST() is available to check for multicast + * addresses. + * + * MP: + *\li No impact. + * + * Reliability: + *\li No anticipated impact. + * + * Resources: + *\li N/A. + * + * Security: + *\li No anticipated impact. + * + * Standards: + *\li BSD Socket API + *\li RFC2553 + */ + +/*** + *** Imports. + ***/ +#include <inttypes.h> + +#include <isc/lang.h> +#include <isc/types.h> + +#include <arpa/inet.h> /* Contractual promise. */ +#include <net/if.h> +#include <netinet/in.h> /* Contractual promise. */ +#include <sys/socket.h> /* Contractual promise. */ +#include <sys/types.h> + +#ifndef IN6ADDR_LOOPBACK_INIT +#ifdef s6_addr +/*% IPv6 address loopback init */ +#define IN6ADDR_LOOPBACK_INIT \ + { \ + { \ + { \ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 \ + } \ + } \ + } +#else /* ifdef s6_addr */ +#define IN6ADDR_LOOPBACK_INIT \ + { \ + { \ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 \ + } \ + } +#endif /* ifdef s6_addr */ +#endif /* ifndef IN6ADDR_LOOPBACK_INIT */ + +#ifndef IN6ADDR_V4MAPPED_INIT +#ifdef s6_addr +/*% IPv6 v4mapped prefix init */ +#define IN6ADDR_V4MAPPED_INIT \ + { \ + { \ + { \ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff, 0, \ + 0, 0, 0 \ + } \ + } \ + } +#else /* ifdef s6_addr */ +#define IN6ADDR_V4MAPPED_INIT \ + { \ + { \ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff, 0, 0, 0, 0 \ + } \ + } +#endif /* ifdef s6_addr */ +#endif /* ifndef IN6ADDR_V4MAPPED_INIT */ + +#ifndef IN6_IS_ADDR_V4MAPPED +/*% Is IPv6 address V4 mapped? */ +#define IN6_IS_ADDR_V4MAPPED(x) \ + (memcmp((x)->s6_addr, in6addr_any.s6_addr, 10) == 0 && \ + (x)->s6_addr[10] == 0xff && (x)->s6_addr[11] == 0xff) +#endif /* ifndef IN6_IS_ADDR_V4MAPPED */ + +#ifndef IN6_IS_ADDR_V4COMPAT +/*% Is IPv6 address V4 compatible? */ +#define IN6_IS_ADDR_V4COMPAT(x) \ + (memcmp((x)->s6_addr, in6addr_any.s6_addr, 12) == 0 && \ + ((x)->s6_addr[12] != 0 || (x)->s6_addr[13] != 0 || \ + (x)->s6_addr[14] != 0 || \ + ((x)->s6_addr[15] != 0 && (x)->s6_addr[15] != 1))) +#endif /* ifndef IN6_IS_ADDR_V4COMPAT */ + +#ifndef IN6_IS_ADDR_MULTICAST +/*% Is IPv6 address multicast? */ +#define IN6_IS_ADDR_MULTICAST(a) ((a)->s6_addr[0] == 0xff) +#endif /* ifndef IN6_IS_ADDR_MULTICAST */ + +#ifndef IN6_IS_ADDR_LINKLOCAL +/*% Is IPv6 address linklocal? */ +#define IN6_IS_ADDR_LINKLOCAL(a) \ + (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0x80)) +#endif /* ifndef IN6_IS_ADDR_LINKLOCAL */ + +#ifndef IN6_IS_ADDR_SITELOCAL +/*% is IPv6 address sitelocal? */ +#define IN6_IS_ADDR_SITELOCAL(a) \ + (((a)->s6_addr[0] == 0xfe) && (((a)->s6_addr[1] & 0xc0) == 0xc0)) +#endif /* ifndef IN6_IS_ADDR_SITELOCAL */ + +#ifndef IN6_IS_ADDR_LOOPBACK +/*% is IPv6 address loopback? */ +#define IN6_IS_ADDR_LOOPBACK(x) \ + (memcmp((x)->s6_addr, in6addr_loopback.s6_addr, 16) == 0) +#endif /* ifndef IN6_IS_ADDR_LOOPBACK */ + +#ifndef AF_INET6 +/*% IPv6 */ +#define AF_INET6 99 +#endif /* ifndef AF_INET6 */ + +#ifndef PF_INET6 +/*% IPv6 */ +#define PF_INET6 AF_INET6 +#endif /* ifndef PF_INET6 */ + +#ifndef INADDR_ANY +/*% inaddr any */ +#define INADDR_ANY 0x00000000UL +#endif /* ifndef INADDR_ANY */ + +#ifndef INADDR_LOOPBACK +/*% inaddr loopback */ +#define INADDR_LOOPBACK 0x7f000001UL +#endif /* ifndef INADDR_LOOPBACK */ + +#ifndef MSG_TRUNC +/*% + * If this system does not have MSG_TRUNC (as returned from recvmsg()) + * ISC_PLATFORM_RECVOVERFLOW will be defined. This will enable the MSG_TRUNC + * faking code in socket.c. + */ +#define ISC_PLATFORM_RECVOVERFLOW +#endif /* ifndef MSG_TRUNC */ + +/*% IP address. */ +#define ISC__IPADDR(x) ((uint32_t)htonl((uint32_t)(x))) + +/*% Is IP address multicast? */ +#define ISC_IPADDR_ISMULTICAST(i) \ + (((uint32_t)(i)&ISC__IPADDR(0xf0000000)) == ISC__IPADDR(0xe0000000)) + +#define ISC_IPADDR_ISEXPERIMENTAL(i) \ + (((uint32_t)(i)&ISC__IPADDR(0xf0000000)) == ISC__IPADDR(0xf0000000)) + +/*** + *** Functions. + ***/ + +ISC_LANG_BEGINDECLS + +isc_result_t +isc_net_probeipv4(void); +/*%< + * Check if the system's kernel supports IPv4. + * + * Returns: + * + *\li #ISC_R_SUCCESS IPv4 is supported. + *\li #ISC_R_NOTFOUND IPv4 is not supported. + *\li #ISC_R_DISABLED IPv4 is disabled. + *\li #ISC_R_UNEXPECTED + */ + +isc_result_t +isc_net_probeipv6(void); +/*%< + * Check if the system's kernel supports IPv6. + * + * Returns: + * + *\li #ISC_R_SUCCESS IPv6 is supported. + *\li #ISC_R_NOTFOUND IPv6 is not supported. + *\li #ISC_R_DISABLED IPv6 is disabled. + *\li #ISC_R_UNEXPECTED + */ + +isc_result_t +isc_net_probe_ipv6only(void); +/*%< + * Check if the system's kernel supports the IPV6_V6ONLY socket option. + * + * Returns: + * + *\li #ISC_R_SUCCESS the option is supported for both TCP and UDP. + *\li #ISC_R_NOTFOUND IPv6 itself or the option is not supported. + *\li #ISC_R_UNEXPECTED + */ + +isc_result_t +isc_net_probe_ipv6pktinfo(void); +/* + * Check if the system's kernel supports the IPV6_(RECV)PKTINFO socket option + * for UDP sockets. + * + * Returns: + * + * \li #ISC_R_SUCCESS the option is supported. + * \li #ISC_R_NOTFOUND IPv6 itself or the option is not supported. + * \li #ISC_R_UNEXPECTED + */ + +void +isc_net_disableipv4(void); + +void +isc_net_disableipv6(void); + +void +isc_net_enableipv4(void); + +void +isc_net_enableipv6(void); + +isc_result_t +isc_net_probeunix(void); +/* + * Returns whether UNIX domain sockets are supported. + */ + +isc_result_t +isc_net_getudpportrange(int af, in_port_t *low, in_port_t *high); +/*%< + * Returns system's default range of ephemeral UDP ports, if defined. + * If the range is not available or unknown, ISC_NET_PORTRANGELOW and + * ISC_NET_PORTRANGEHIGH will be returned. + * + * Requires: + * + *\li 'low' and 'high' must be non NULL. + * + * Returns: + * + *\li *low and *high will be the ports specifying the low and high ends of + * the range. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/netaddr.h b/lib/isc/include/isc/netaddr.h new file mode 100644 index 0000000..112051f --- /dev/null +++ b/lib/isc/include/isc/netaddr.h @@ -0,0 +1,197 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/netaddr.h */ + +#include <inttypes.h> +#include <stdbool.h> + +#include <isc/lang.h> +#include <isc/net.h> +#include <isc/types.h> + +#include <sys/types.h> +#include <sys/un.h> + +ISC_LANG_BEGINDECLS + +/* + * Any updates to this structure should also be applied in + * contrib/modules/dlz/dlz_minmal.h. + */ +struct isc_netaddr { + unsigned int family; + union { + struct in_addr in; + struct in6_addr in6; + char un[sizeof(((struct sockaddr_un *)0)->sun_path)]; + } type; + uint32_t zone; +}; + +struct isc_netprefix { + isc_netaddr_t addr; + unsigned int prefixlen; +}; + +bool +isc_netaddr_equal(const isc_netaddr_t *a, const isc_netaddr_t *b); + +/*%< + * Compare network addresses 'a' and 'b'. Return #true if + * they are equal, #false if not. + */ + +bool +isc_netaddr_eqprefix(const isc_netaddr_t *a, const isc_netaddr_t *b, + unsigned int prefixlen); +/*%< + * Compare the 'prefixlen' most significant bits of the network + * addresses 'a' and 'b'. If 'b''s scope is zero then 'a''s scope is + * ignored. Return #true if they are equal, #false if not. + */ + +isc_result_t +isc_netaddr_masktoprefixlen(const isc_netaddr_t *s, unsigned int *lenp); +/*%< + * Convert a netmask in 's' into a prefix length in '*lenp'. + * The mask should consist of zero or more '1' bits in the + * most significant part of the address, followed by '0' bits. + * If this is not the case, #ISC_R_MASKNONCONTIG is returned. + * + * Returns: + *\li #ISC_R_SUCCESS + *\li #ISC_R_MASKNONCONTIG + */ + +isc_result_t +isc_netaddr_totext(const isc_netaddr_t *netaddr, isc_buffer_t *target); +/*%< + * Append a text representation of 'sockaddr' to the buffer 'target'. + * The text is NOT null terminated. Handles IPv4 and IPv6 addresses. + * + * Returns: + *\li #ISC_R_SUCCESS + *\li #ISC_R_NOSPACE The text or the null termination did not fit. + *\li #ISC_R_FAILURE Unspecified failure + */ + +void +isc_netaddr_format(const isc_netaddr_t *na, char *array, unsigned int size); +/*%< + * Format a human-readable representation of the network address '*na' + * into the character array 'array', which is of size 'size'. + * The resulting string is guaranteed to be null-terminated. + */ + +#define ISC_NETADDR_FORMATSIZE \ + sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:XXX.XXX.XXX.XXX%SSSSSSSSSS") +/*%< + * Minimum size of array to pass to isc_netaddr_format(). + */ + +void +isc_netaddr_fromsockaddr(isc_netaddr_t *netaddr, const isc_sockaddr_t *source); + +void +isc_netaddr_fromin(isc_netaddr_t *netaddr, const struct in_addr *ina); + +void +isc_netaddr_fromin6(isc_netaddr_t *netaddr, const struct in6_addr *ina6); + +isc_result_t +isc_netaddr_frompath(isc_netaddr_t *netaddr, const char *path); + +void +isc_netaddr_setzone(isc_netaddr_t *netaddr, uint32_t zone); + +uint32_t +isc_netaddr_getzone(const isc_netaddr_t *netaddr); + +void +isc_netaddr_any(isc_netaddr_t *netaddr); +/*%< + * Return the IPv4 wildcard address. + */ + +void +isc_netaddr_any6(isc_netaddr_t *netaddr); +/*%< + * Return the IPv6 wildcard address. + */ + +void +isc_netaddr_unspec(isc_netaddr_t *netaddr); +/*%< + * Initialize as AF_UNSPEC address. + */ + +bool +isc_netaddr_ismulticast(const isc_netaddr_t *na); +/*%< + * Returns true if the address is a multicast address. + */ + +bool +isc_netaddr_isexperimental(const isc_netaddr_t *na); +/*%< + * Returns true if the address is a experimental (CLASS E) address. + */ + +bool +isc_netaddr_islinklocal(const isc_netaddr_t *na); +/*%< + * Returns #true if the address is a link local address. + */ + +bool +isc_netaddr_issitelocal(const isc_netaddr_t *na); +/*%< + * Returns #true if the address is a site local address. + */ + +bool +isc_netaddr_isnetzero(const isc_netaddr_t *na); +/*%< + * Returns #true if the address is in net zero. + */ + +void +isc_netaddr_fromv4mapped(isc_netaddr_t *t, const isc_netaddr_t *s); +/*%< + * Convert an IPv6 v4mapped address into an IPv4 address. + */ + +isc_result_t +isc_netaddr_prefixok(const isc_netaddr_t *na, unsigned int prefixlen); +/* + * Test whether the netaddr 'na' and 'prefixlen' are consistent. + * e.g. prefixlen within range. + * na does not have bits set which are not covered by the prefixlen. + * + * Returns: + * ISC_R_SUCCESS + * ISC_R_RANGE prefixlen out of range + * ISC_R_NOTIMPLEMENTED unsupported family + * ISC_R_FAILURE extra bits. + */ + +bool +isc_netaddr_isloopback(const isc_netaddr_t *na); +/* + * Test whether the netaddr 'na' is a loopback IPv4 or IPv6 address (in + * 127.0.0.0/8 or ::1). + */ +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/netdb.h b/lib/isc/include/isc/netdb.h new file mode 100644 index 0000000..93799d7 --- /dev/null +++ b/lib/isc/include/isc/netdb.h @@ -0,0 +1,48 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/***** +***** Module Info +*****/ + +/*! \file + * \brief + * Portable netdb.h support. + * + * This module is responsible for defining the get<x>by<y> APIs. + * + * MP: + *\li No impact. + * + * Reliability: + *\li No anticipated impact. + * + * Resources: + *\li N/A. + * + * Security: + *\li No anticipated impact. + * + * Standards: + *\li BSD API + */ + +/*** + *** Imports. + ***/ + +#include <netdb.h> + +#include <isc/net.h> diff --git a/lib/isc/include/isc/netmgr.h b/lib/isc/include/isc/netmgr.h new file mode 100644 index 0000000..eff33f6 --- /dev/null +++ b/lib/isc/include/isc/netmgr.h @@ -0,0 +1,811 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#include <unistd.h> + +#include <isc/mem.h> +#include <isc/region.h> +#include <isc/result.h> +#include <isc/tls.h> +#include <isc/types.h> + +#include <sys/socket.h> +#include <sys/types.h> + +#if defined(SO_REUSEPORT_LB) || (defined(SO_REUSEPORT) && defined(__linux__)) +#define HAVE_SO_REUSEPORT_LB 1 +#endif + +/* + * Replacement for isc_sockettype_t provided by socket.h. + */ +typedef enum { + isc_socktype_tcp = 1, + isc_socktype_udp = 2, + isc_socktype_unix = 3, + isc_socktype_raw = 4 +} isc_socktype_t; + +typedef void (*isc_nm_recv_cb_t)(isc_nmhandle_t *handle, isc_result_t eresult, + isc_region_t *region, void *cbarg); +/*%< + * Callback function to be used when receiving a packet. + * + * 'handle' the handle that can be used to send back the answer. + * 'eresult' the result of the event. + * 'region' contains the received data, if any. It will be freed + * after return by caller. + * 'cbarg' the callback argument passed to isc_nm_listenudp(), + * isc_nm_listentcpdns(), or isc_nm_read(). + */ +typedef isc_result_t (*isc_nm_accept_cb_t)(isc_nmhandle_t *handle, + isc_result_t result, void *cbarg); +/*%< + * Callback function to be used when accepting a connection. (This differs + * from isc_nm_cb_t below in that it returns a result code.) + * + * 'handle' the handle that can be used to send back the answer. + * 'eresult' the result of the event. + * 'cbarg' the callback argument passed to isc_nm_listentcp() or + * isc_nm_listentcpdns(). + */ + +typedef void (*isc_nm_cb_t)(isc_nmhandle_t *handle, isc_result_t result, + void *cbarg); +/*%< + * Callback function for other network completion events (send, connect). + * + * 'handle' the handle on which the event took place. + * 'eresult' the result of the event. + * 'cbarg' the callback argument passed to isc_nm_send(), + * isc_nm_tcp_connect(), or isc_nm_listentcp() + */ + +typedef void (*isc_nm_opaquecb_t)(void *arg); +/*%< + * Opaque callback function, used for isc_nmhandle 'reset' and 'free' + * callbacks. + */ + +typedef void (*isc_nm_workcb_t)(void *arg); +typedef void (*isc_nm_after_workcb_t)(void *arg, isc_result_t result); +/*%< + * Callback functions for libuv threadpool work (see uv_work_t) + */ + +void +isc_nm_attach(isc_nm_t *mgr, isc_nm_t **dst); +void +isc_nm_detach(isc_nm_t **mgr0); +/*%< + * Attach/detach a network manager. When all references have been + * released, the network manager is shut down, freeing all resources. + * Destroy is working the same way as detach, but it actively waits + * for all other references to be gone. + */ + +/* Return thread ID of current thread, or ISC_NETMGR_TID_UNKNOWN */ +int +isc_nm_tid(void); + +void +isc_nmsocket_close(isc_nmsocket_t **sockp); +/*%< + * isc_nmsocket_close() detaches a listening socket that was + * created by isc_nm_listenudp(), isc_nm_listentcp(), or + * isc_nm_listentcpdns(). Once there are no remaining child + * sockets with active handles, the socket will be closed. + */ + +void +isc_nmsocket_set_tlsctx(isc_nmsocket_t *listener, isc_tlsctx_t *tlsctx); +/*%< + * Asynchronously replace the TLS context within the listener socket object. + * The function is intended to be used during reconfiguration. + * + * Requires: + * \li 'listener' is a pointer to a valid network manager listener socket + object with TLS support; + * \li 'tlsctx' is a valid pointer to a TLS context object. + */ + +void +isc_nmsocket_set_max_streams(isc_nmsocket_t *listener, + const uint32_t max_streams); +/*%< + * Set the maximum allowed number of concurrent streams for accepted + * client connections. The implementation might be asynchronous + * depending on the listener socket type. + * + * The call is a no-op for any listener socket type that does not + * support concept of multiple sessions per a client + * connection. Currently, it works only for HTTP/2 listeners. + * + * Setting 'max_streams' to '0' instructs the listener that there is + * no limit for concurrent streams. + * + * Requires: + * \li 'listener' is a pointer to a valid network manager listener socket. + */ + +#ifdef NETMGR_TRACE +#define isc_nmhandle_attach(handle, dest) \ + isc__nmhandle_attach(handle, dest, __FILE__, __LINE__, __func__) +#define isc_nmhandle_detach(handlep) \ + isc__nmhandle_detach(handlep, __FILE__, __LINE__, __func__) +#define FLARG , const char *file, unsigned int line, const char *func +#else +#define isc_nmhandle_attach(handle, dest) isc__nmhandle_attach(handle, dest) +#define isc_nmhandle_detach(handlep) isc__nmhandle_detach(handlep) +#define FLARG +#endif + +void +isc__nmhandle_attach(isc_nmhandle_t *handle, isc_nmhandle_t **dest FLARG); +void +isc__nmhandle_detach(isc_nmhandle_t **handlep FLARG); +/*%< + * Increment/decrement the reference counter in a netmgr handle, + * but (unlike the attach/detach functions) do not change the pointer + * value. If reference counters drop to zero, the handle can be + * marked inactive, possibly triggering deletion of its associated + * socket. + * + * (This will be used to prevent a client from being cleaned up when + * it's passed to an isc_task event handler. The libuv code would not + * otherwise know that the handle was in use and might free it, along + * with the client.) + */ +#undef FLARG + +void * +isc_nmhandle_getdata(isc_nmhandle_t *handle); + +void * +isc_nmhandle_getextra(isc_nmhandle_t *handle); + +bool +isc_nmhandle_is_stream(isc_nmhandle_t *handle); + +void +isc_nmhandle_setdata(isc_nmhandle_t *handle, void *arg, + isc_nm_opaquecb_t doreset, isc_nm_opaquecb_t dofree); +/*%< + * isc_nmhandle_t has a void* opaque field (for example, ns_client_t). + * We reuse handle and `opaque` can also be reused between calls. + * This function sets this field and two callbacks: + * - doreset resets the `opaque` to initial state + * - dofree frees everything associated with `opaque` + */ + +void +isc_nmhandle_settimeout(isc_nmhandle_t *handle, uint32_t timeout); +void +isc_nmhandle_cleartimeout(isc_nmhandle_t *handle); +/*%< + * Set/clear the read/recv timeout for the socket connected to 'handle' + * to 'timeout' (in milliseconds), and reset the timer. + * + * When this is called on a 'wrapper' socket handle (for example, + * a TCPDNS socket wrapping a TCP connection), the timer is set for + * both socket layers. + */ +bool +isc_nmhandle_timer_running(isc_nmhandle_t *handle); +/*%< + * Return true if the timer for the socket connected to 'handle' + * is running. + */ + +void +isc_nmhandle_keepalive(isc_nmhandle_t *handle, bool value); +/*%< + * Enable/disable keepalive on this connection by setting it to 'value'. + * + * When keepalive is active, we switch to using the keepalive timeout + * to determine when to close a connection, rather than the idle timeout. + * + * This applies only to TCP-based DNS connections (i.e., TCPDNS or + * TLSDNS). On other types of connection it has no effect. + */ + +isc_sockaddr_t +isc_nmhandle_peeraddr(isc_nmhandle_t *handle); +/*%< + * Return the peer address for the given handle. + */ +isc_sockaddr_t +isc_nmhandle_localaddr(isc_nmhandle_t *handle); +/*%< + * Return the local address for the given handle. + */ + +isc_nm_t * +isc_nmhandle_netmgr(isc_nmhandle_t *handle); +/*%< + * Return a pointer to the netmgr object for the given handle. + */ + +isc_result_t +isc_nm_listenudp(isc_nm_t *mgr, isc_sockaddr_t *iface, isc_nm_recv_cb_t cb, + void *cbarg, size_t extrasize, isc_nmsocket_t **sockp); +/*%< + * Start listening for UDP packets on interface 'iface' using net manager + * 'mgr'. + * + * On success, 'sockp' will be updated to contain a new listening UDP socket. + * + * When a packet is received on the socket, 'cb' will be called with 'cbarg' + * as its argument. + * + * When handles are allocated for the socket, 'extrasize' additional bytes + * can be allocated along with the handle for an associated object, which + * can then be freed automatically when the handle is destroyed. + */ + +void +isc_nm_udpconnect(isc_nm_t *mgr, isc_sockaddr_t *local, isc_sockaddr_t *peer, + isc_nm_cb_t cb, void *cbarg, unsigned int timeout, + size_t extrahandlesize); +/*%< + * Open a UDP socket, bind to 'local' and connect to 'peer', and + * immediately call 'cb' with a handle so that the caller can begin + * sending packets over UDP. + * + * When handles are allocated for the socket, 'extrasize' additional bytes + * can be allocated along with the handle for an associated object, which + * can then be freed automatically when the handle is destroyed. + * + * 'timeout' specifies the timeout interval in milliseconds. + * + * The connected socket can only be accessed via the handle passed to + * 'cb'. + */ + +isc_result_t +isc_nm_routeconnect(isc_nm_t *mgr, isc_nm_cb_t cb, void *cbarg, + size_t extrahandlesize); +/*%< + * Open a route/netlink socket and call 'cb', so the caller can be + * begin listening for interface changes. This behaves similarly to + * isc_nm_udpconnect(). + * + * Returns ISC_R_NOTIMPLEMENTED on systems where route/netlink sockets + * are not supported. + */ + +void +isc_nm_stoplistening(isc_nmsocket_t *sock); +/*%< + * Stop listening on socket 'sock'. + */ + +void +isc_nm_pause(isc_nm_t *mgr); +/*%< + * Pause all processing, equivalent to taskmgr exclusive tasks. + * It won't return until all workers have been paused. + */ + +void +isc_nm_resume(isc_nm_t *mgr); +/*%< + * Resume paused processing. It will return immediately after signalling + * workers to resume. + */ + +void +isc_nm_read(isc_nmhandle_t *handle, isc_nm_recv_cb_t cb, void *cbarg); +/* + * Begin (or continue) reading on the socket associated with 'handle', and + * update its recv callback to 'cb', which will be called as soon as there + * is data to process. + */ + +void +isc_nm_pauseread(isc_nmhandle_t *handle); +/*%< + * Pause reading on this handle's socket, but remember the callback. + * + * Requires: + * \li 'handle' is a valid netmgr handle. + */ + +void +isc_nm_cancelread(isc_nmhandle_t *handle); +/*%< + * Cancel reading on a connected socket. Calls the read/recv callback on + * active handles with a result code of ISC_R_CANCELED. + * + * Requires: + * \li 'sock' is a valid netmgr socket + * \li ...for which a read/recv callback has been defined. + */ + +void +isc_nm_resumeread(isc_nmhandle_t *handle); +/*%< + * Resume reading on the handle's socket. + * + * Requires: + * \li 'handle' is a valid netmgr handle. + * \li ...for a socket with a defined read/recv callback. + */ + +void +isc_nm_send(isc_nmhandle_t *handle, isc_region_t *region, isc_nm_cb_t cb, + void *cbarg); +/*%< + * Send the data in 'region' via 'handle'. Afterward, the callback 'cb' is + * called with the argument 'cbarg'. + * + * 'region' is not copied; it has to be allocated beforehand and freed + * in 'cb'. + */ + +isc_result_t +isc_nm_listentcp(isc_nm_t *mgr, isc_sockaddr_t *iface, + isc_nm_accept_cb_t accept_cb, void *accept_cbarg, + size_t extrahandlesize, int backlog, isc_quota_t *quota, + isc_nmsocket_t **sockp); +/*%< + * Start listening for raw messages over the TCP interface 'iface', using + * net manager 'mgr'. + * + * On success, 'sockp' will be updated to contain a new listening TCP + * socket. + * + * When connection is accepted on the socket, 'accept_cb' will be called with + * 'accept_cbarg' as its argument. The callback is expected to start a read. + * + * When handles are allocated for the socket, 'extrasize' additional bytes + * will be allocated along with the handle for an associated object. + * + * If 'quota' is not NULL, then the socket is attached to the specified + * quota. This allows us to enforce TCP client quota limits. + * + */ + +void +isc_nm_tcpconnect(isc_nm_t *mgr, isc_sockaddr_t *local, isc_sockaddr_t *peer, + isc_nm_cb_t cb, void *cbarg, unsigned int timeout, + size_t extrahandlesize); +/*%< + * Create a socket using netmgr 'mgr', bind it to the address 'local', + * and connect it to the address 'peer'. + * + * When the connection is complete or has timed out, call 'cb' with + * argument 'cbarg'. Allocate 'extrahandlesize' additional bytes along + * with the handle to use for an associated object. + * + * 'timeout' specifies the timeout interval in milliseconds. + * + * The connected socket can only be accessed via the handle passed to + * 'cb'. + */ + +isc_result_t +isc_nm_listentcpdns(isc_nm_t *mgr, isc_sockaddr_t *iface, + isc_nm_recv_cb_t recv_cb, void *recv_cbarg, + isc_nm_accept_cb_t accept_cb, void *accept_cbarg, + size_t extrahandlesize, int backlog, isc_quota_t *quota, + isc_nmsocket_t **sockp); +/*%< + * Start listening for DNS messages over the TCP interface 'iface', using + * net manager 'mgr'. + * + * On success, 'sockp' will be updated to contain a new listening TCPDNS + * socket. This is a wrapper around a raw TCP socket, which sends and + * receives DNS messages via that socket. It handles message buffering + * and pipelining, and automatically prepends messages with a two-byte + * length field. + * + * When a complete DNS message is received on the socket, 'cb' will be + * called with 'cbarg' as its argument. + * + * When a new TCPDNS connection is accepted, 'accept_cb' will be called + * with 'accept_cbarg' as its argument. + * + * When handles are allocated for the socket, 'extrasize' additional bytes + * will be allocated along with the handle for an associated object + * (typically ns_client). + * + * 'quota' is passed to isc_nm_listentcp() when opening the raw TCP socket. + */ + +isc_result_t +isc_nm_listentlsdns(isc_nm_t *mgr, isc_sockaddr_t *iface, + isc_nm_recv_cb_t recv_cb, void *recv_cbarg, + isc_nm_accept_cb_t accept_cb, void *accept_cbarg, + size_t extrahandlesize, int backlog, isc_quota_t *quota, + isc_tlsctx_t *sslctx, isc_nmsocket_t **sockp); +/*%< + * Same as isc_nm_listentcpdns but for an SSL (DoT) socket. + */ + +void +isc_nm_sequential(isc_nmhandle_t *handle); +/*%< + * Disable pipelining on this connection. Each DNS packet will be only + * processed after the previous completes. + * + * The socket must be unpaused after the query is processed. This is done + * the response is sent, or if we're dropping the query, it will be done + * when a handle is fully dereferenced by calling the socket's + * closehandle_cb callback. + * + * Note: This can only be run while a message is being processed; if it is + * run before any messages are read, no messages will be read. + * + * Also note: once this has been set, it cannot be reversed for a given + * connection. + */ + +void +isc_nm_settimeouts(isc_nm_t *mgr, uint32_t init, uint32_t idle, + uint32_t keepalive, uint32_t advertised); +/*%< + * Sets the initial, idle, and keepalive timeout values (in milliseconds) to use + * for TCP connections, and the timeout value to advertise in responses using + * the EDNS TCP Keepalive option (which should ordinarily be the same + * as 'keepalive'), in milliseconds. + * + * Requires: + * \li 'mgr' is a valid netmgr. + */ + +void +isc_nm_setnetbuffers(isc_nm_t *mgr, int32_t recv_tcp, int32_t send_tcp, + int32_t recv_udp, int32_t send_udp); +/*%< + * If not 0, sets the SO_RCVBUF and SO_SNDBUF socket options for TCP and UDP + * respectively. + * + * Requires: + * \li 'mgr' is a valid netmgr. + */ + +bool +isc_nm_getloadbalancesockets(isc_nm_t *mgr); +void +isc_nm_setloadbalancesockets(isc_nm_t *mgr, bool enabled); +/*%< + * Get and set value of load balancing of the sockets. + * + * Requires: + * \li 'mgr' is a valid netmgr. + */ + +void +isc_nm_gettimeouts(isc_nm_t *mgr, uint32_t *initial, uint32_t *idle, + uint32_t *keepalive, uint32_t *advertised); +/*%< + * Gets the initial, idle, keepalive, or advertised timeout values, + * in milliseconds. + * + * Any integer pointer parameter not set to NULL will be updated to + * contain the corresponding timeout value. + * + * Requires: + * \li 'mgr' is a valid netmgr. + */ + +void +isc_nm_maxudp(isc_nm_t *mgr, uint32_t maxudp); +/*%< + * Simulate a broken firewall that blocks UDP messages larger than a given + * size. + */ + +void +isc_nm_setstats(isc_nm_t *mgr, isc_stats_t *stats); +/*%< + * Set a socket statistics counter set 'stats' for 'mgr'. + * + * Requires: + *\li 'mgr' is valid and doesn't have stats already set. + * + *\li stats is a valid set of statistics counters supporting the + * full range of socket-related stats counter numbers. + */ + +isc_result_t +isc_nm_checkaddr(const isc_sockaddr_t *addr, isc_socktype_t type); +/*%< + * Check whether the specified address is available on the local system + * by opening a socket and immediately closing it. + * + * Requires: + *\li 'addr' is not NULL. + */ + +void +isc_nm_tcpdnsconnect(isc_nm_t *mgr, isc_sockaddr_t *local, isc_sockaddr_t *peer, + isc_nm_cb_t cb, void *cbarg, unsigned int timeout, + size_t extrahandlesize); +void +isc_nm_tlsdnsconnect(isc_nm_t *mgr, isc_sockaddr_t *local, isc_sockaddr_t *peer, + isc_nm_cb_t cb, void *cbarg, unsigned int timeout, + size_t extrahandlesize, isc_tlsctx_t *sslctx, + isc_tlsctx_client_session_cache_t *client_sess_cache); +/*%< + * Establish a DNS client connection via a TCP or TLS connection, bound to + * the address 'local' and connected to the address 'peer'. + * + * When the connection is complete or has timed out, call 'cb' with + * argument 'cbarg'. Allocate 'extrahandlesize' additional bytes along + * with the handle to use for an associated object. + * + * 'timeout' specifies the timeout interval in milliseconds. + * + * The connected socket can only be accessed via the handle passed to + * 'cb'. + */ + +/*%< + * Returns 'true' iff 'handle' is associated with a socket of type + * 'isc_nm_tlsdnssocket'. + */ + +bool +isc_nm_is_http_handle(isc_nmhandle_t *handle); +/*%< + * Returns 'true' iff 'handle' is associated with a socket of type + * 'isc_nm_httpsocket'. + */ + +#if HAVE_LIBNGHTTP2 + +#define ISC_NM_HTTP_DEFAULT_PATH "/dns-query" + +isc_result_t +isc_nm_listentls(isc_nm_t *mgr, isc_sockaddr_t *iface, + isc_nm_accept_cb_t accept_cb, void *accept_cbarg, + size_t extrahandlesize, int backlog, isc_quota_t *quota, + isc_tlsctx_t *sslctx, isc_nmsocket_t **sockp); + +void +isc_nm_tlsconnect(isc_nm_t *mgr, isc_sockaddr_t *local, isc_sockaddr_t *peer, + isc_nm_cb_t cb, void *cbarg, isc_tlsctx_t *ctx, + isc_tlsctx_client_session_cache_t *client_sess_cache, + unsigned int timeout, size_t extrahandlesize); + +void +isc_nm_httpconnect(isc_nm_t *mgr, isc_sockaddr_t *local, isc_sockaddr_t *peer, + const char *uri, bool POST, isc_nm_cb_t cb, void *cbarg, + isc_tlsctx_t *ctx, + isc_tlsctx_client_session_cache_t *client_sess_cache, + unsigned int timeout, size_t extrahandlesize); + +isc_result_t +isc_nm_listenhttp(isc_nm_t *mgr, isc_sockaddr_t *iface, int backlog, + isc_quota_t *quota, isc_tlsctx_t *ctx, + isc_nm_http_endpoints_t *eps, uint32_t max_concurrent_streams, + isc_nmsocket_t **sockp); + +isc_nm_http_endpoints_t * +isc_nm_http_endpoints_new(isc_mem_t *mctx); +/*%< + * Create a new, empty HTTP endpoints set object. + * + * Requires: + * \li 'mctx' a valid memory context object. + */ + +isc_result_t +isc_nm_http_endpoints_add(isc_nm_http_endpoints_t *restrict eps, + const char *uri, const isc_nm_recv_cb_t cb, + void *cbarg, const size_t extrahandlesize); +/*%< Adds a new endpoint to the given HTTP endpoints set object. + * + * NOTE: adding an endpoint is allowed only if the endpoint object has + * not been passed to isc_nm_listenhttp() yet. + * + * Requires: + * \li 'eps' is a valid pointer to a valid isc_nm_http_endpoints_t + * object; + * \li 'uri' is a valid pointer to a string of length > 0; + * \li 'cb' is a valid pointer to a read callback function. + */ + +void +isc_nm_http_endpoints_attach(isc_nm_http_endpoints_t *source, + isc_nm_http_endpoints_t **targetp); +/*%< + * Attaches to an HTTP endpoints set object. + * + * Requires: + * \li 'source' is a non-NULL pointer to a valid + * isc_nm_http_endpoints_t object; + * \li 'target' is a pointer to a pointer, containing NULL. + */ + +void +isc_nm_http_endpoints_detach(isc_nm_http_endpoints_t **restrict epsp); +/*%< + * Detaches from an HTTP endpoints set object. When reference count + * reaches 0, the object get deleted. + * + * Requires: + * \li 'epsp' is a pointer to a pointer to a valid + * isc_nm_http_endpoints_t object. + */ + +bool +isc_nm_http_path_isvalid(const char *path); +/*%< + * Returns 'true' if 'path' matches the format requirements for + * the path component of a URI as defined in RFC 3986 section 3.3. + */ + +void +isc_nm_http_makeuri(const bool https, const isc_sockaddr_t *sa, + const char *hostname, const uint16_t http_port, + const char *abs_path, char *outbuf, + const size_t outbuf_len); +/*%< + * Makes a URI connection string out of na isc_sockaddr_t object 'sa' + * or the specified 'hostname' and 'http_port'. + * + * Requires: + * \li 'abs_path' is a valid absolute HTTP path string; + * \li 'outbuf' is a valid pointer to a buffer which will get the result; + * \li 'outbuf_len' is a size of the result buffer and is greater than zero. + */ + +void +isc_nm_http_set_endpoints(isc_nmsocket_t *listener, + isc_nm_http_endpoints_t *eps); +/*%< + * Asynchronously replace the set of HTTP endpoints (paths) within + * the listener socket object. The function is intended to be used + * during reconfiguration. + * + * Requires: + * \li 'listener' is a pointer to a valid network manager HTTP listener socket; + * \li 'eps' is a valid pointer to an HTTP endpoints set. + */ + +#endif /* HAVE_LIBNGHTTP2 */ + +void +isc_nm_bad_request(isc_nmhandle_t *handle); +/*%< + * Perform a transport protocol specific action on the handle in case of a + * bad/malformed incoming DNS message. + * + * NOTE: The function currently is no-op for any protocol except HTTP/2. + * + * Requires: + * \li 'handle' is a valid netmgr handle object. + */ + +isc_result_t +isc_nm_xfr_checkperm(isc_nmhandle_t *handle); +/*%< + * Check if it is permitted to do a zone transfer over the given handle. + * + * Returns: + * \li #ISC_R_SUCCESS Success, permission check passed successfully + * \li #ISC_R_DOTALPNERROR No permission because of ALPN tag mismatch + * \li #ISC_R_NOPERM No permission because of other restrictions + * \li any other result indicates failure (i.e. no permission) + * + * Requires: + * \li 'handle' is a valid connection handle. + */ + +void +isc_nm_set_maxage(isc_nmhandle_t *handle, const uint32_t ttl); +/*%< + * Set the minimal time to live from the server's response Answer + * section as a hint to the underlying transport. + * + * NOTE: The function currently is no-op for any protocol except HTTP/2. + * + * Requires: + * + * \li 'handle' is a valid netmgr handle object associated with an accepted + * connection. + */ + +isc_nmsocket_type +isc_nm_socket_type(const isc_nmhandle_t *handle); +/*%< + * Returns the handle's underlying socket type. + * + * Requires: + * \li 'handle' is a valid netmgr handle object. + */ + +bool +isc_nm_has_encryption(const isc_nmhandle_t *handle); +/*%< + * Returns 'true' iff the handle's underlying transport does encryption. + * + * Requires: + * \li 'handle' is a valid netmgr handle object. + */ + +const char * +isc_nm_verify_tls_peer_result_string(const isc_nmhandle_t *handle); +/*%< + * Returns user-readable message describing TLS peer's certificate + * validation result. Returns 'NULL' for the transport handles for + * which peer verification was not performed. + * + * Requires: + * \li 'handle' is a valid netmgr handle object. + */ + +void +isc_nm_task_enqueue(isc_nm_t *mgr, isc_task_t *task, int threadid); +/*%< + * Enqueue the 'task' onto the netmgr ievents queue. + * + * Requires: + * \li 'mgr' is a valid netmgr object + * \li 'task' is a valid task + * \li 'threadid' is either the preferred netmgr tid or -1, in which case + * tid will be picked randomly. The threadid is capped (by modulo) to + * maximum number of 'workers' as specifed in isc_nm_start() + */ + +void +isc_nm_work_offload(isc_nm_t *mgr, isc_nm_workcb_t work_cb, + isc_nm_after_workcb_t after_work_cb, void *data); +/*%< + * Schedules a job to be handled by the libuv thread pool (see uv_work_t). + * The function specified in `work_cb` will be run by a thread in the + * thread pool; when complete, the `after_work_cb` function will run. + * + * Requires: + * \li 'mgr' is a valid netmgr object. + * \li We are currently running in a network manager thread. + */ + +void +isc__nm_force_tid(int tid); +/*%< + * Force the thread ID to 'tid'. This is STRICTLY for use in unit + * tests and should not be used in any production code. + */ + +void +isc_nmhandle_setwritetimeout(isc_nmhandle_t *handle, uint64_t write_timeout); + +/* + * Timer related functions + */ + +typedef struct isc_nm_timer isc_nm_timer_t; + +typedef void (*isc_nm_timer_cb)(void *, isc_result_t); + +void +isc_nm_timer_create(isc_nmhandle_t *, isc_nm_timer_cb, void *, + isc_nm_timer_t **); + +void +isc_nm_timer_attach(isc_nm_timer_t *, isc_nm_timer_t **); + +void +isc_nm_timer_detach(isc_nm_timer_t **); + +void +isc_nm_timer_start(isc_nm_timer_t *, uint64_t); + +void +isc_nm_timer_stop(isc_nm_timer_t *); diff --git a/lib/isc/include/isc/netscope.h b/lib/isc/include/isc/netscope.h new file mode 100644 index 0000000..307864a --- /dev/null +++ b/lib/isc/include/isc/netscope.h @@ -0,0 +1,36 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/netscope.h */ + +#include <inttypes.h> + +ISC_LANG_BEGINDECLS + +/*% + * Convert a string of an IPv6 scope zone to zone index. If the conversion + * succeeds, 'zoneid' will store the index value. + * + * XXXJT: when a standard interface for this purpose is defined, + * we should use it. + * + * Returns: + * \li ISC_R_SUCCESS: conversion succeeds + * \li ISC_R_FAILURE: conversion fails + */ +isc_result_t +isc_netscope_pton(int af, char *scopename, void *addr, uint32_t *zoneid); + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/nonce.h b/lib/isc/include/isc/nonce.h new file mode 100644 index 0000000..b593e41 --- /dev/null +++ b/lib/isc/include/isc/nonce.h @@ -0,0 +1,33 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#include <stdlib.h> + +#include <isc/lang.h> + +/*! \file isc/nonce.h + * \brief Provides a function for generating an arbitrarily long nonce. + */ + +ISC_LANG_BEGINDECLS + +void +isc_nonce_buf(void *buf, size_t buflen); +/*!< + * Fill 'buf', up to 'buflen' bytes, with random data from the + * crypto provider's random function. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/offset.h b/lib/isc/include/isc/offset.h new file mode 100644 index 0000000..2b62e2a --- /dev/null +++ b/lib/isc/include/isc/offset.h @@ -0,0 +1,25 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file + * \brief + * File offsets are operating-system dependent. + */ +#include <limits.h> /* Required for CHAR_BIT. */ +#include <stddef.h> /* For Linux Standard Base. */ + +#include <sys/types.h> + +typedef off_t isc_offset_t; diff --git a/lib/isc/include/isc/once.h b/lib/isc/include/isc/once.h new file mode 100644 index 0000000..7d341ca --- /dev/null +++ b/lib/isc/include/isc/once.h @@ -0,0 +1,29 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file */ + +#include <pthread.h> + +#include <isc/result.h> + +typedef pthread_once_t isc_once_t; + +#define ISC_ONCE_INIT PTHREAD_ONCE_INIT + +/* XXX We could do fancier error handling... */ + +#define isc_once_do(op, f) \ + ((pthread_once((op), (f)) == 0) ? ISC_R_SUCCESS : ISC_R_UNEXPECTED) diff --git a/lib/isc/include/isc/os.h b/lib/isc/include/isc/os.h new file mode 100644 index 0000000..fd7e5cf --- /dev/null +++ b/lib/isc/include/isc/os.h @@ -0,0 +1,52 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/os.h */ +#include <isc/lang.h> +#include <isc/types.h> + +#include <sys/stat.h> + +ISC_LANG_BEGINDECLS + +/*%< + * Hardcode the L1 cacheline size of the CPU to 64, this is checked in + * the os.c library constructor if operating system provide means to + * get the L1 cacheline size using sysconf(). + */ +#define ISC_OS_CACHELINE_SIZE 64 + +unsigned int +isc_os_ncpus(void); +/*%< + * Return the number of CPUs available on the system, or 1 if this cannot + * be determined. + */ + +unsigned long +isc_os_cacheline(void); +/*%< + * Return L1 cacheline size of the CPU. + * If L1 cache is greater than ISC_OS_CACHELINE_SIZE, ensure it is used + * instead of constant. Is common on ppc64le architecture. + */ + +mode_t +isc_os_umask(void); +/*%< + * Return umask of the current process as initialized at the program start + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/parseint.h b/lib/isc/include/isc/parseint.h new file mode 100644 index 0000000..aa54772 --- /dev/null +++ b/lib/isc/include/isc/parseint.h @@ -0,0 +1,57 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#include <inttypes.h> + +#include <isc/lang.h> +#include <isc/types.h> + +/*! \file isc/parseint.h + * \brief Parse integers, in a saner way than atoi() or strtoul() do. + */ + +/*** + *** Functions + ***/ + +ISC_LANG_BEGINDECLS + +isc_result_t +isc_parse_uint32(uint32_t *uip, const char *string, int base); + +isc_result_t +isc_parse_uint16(uint16_t *uip, const char *string, int base); + +isc_result_t +isc_parse_uint8(uint8_t *uip, const char *string, int base); +/*%< + * Parse the null-terminated string 'string' containing a base 'base' + * integer, storing the result in '*uip'. + * The base is interpreted + * as in strtoul(). Unlike strtoul(), leading whitespace, minus or + * plus signs are not accepted, and all errors (including overflow) + * are reported uniformly through the return value. + * + * Requires: + *\li 'string' points to a null-terminated string + *\li 0 <= 'base' <= 36 + * + * Returns: + *\li #ISC_R_SUCCESS + *\li #ISC_R_BADNUMBER The string is not numeric (in the given base) + *\li #ISC_R_RANGE The number is not representable as the requested type. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/pool.h b/lib/isc/include/isc/pool.h new file mode 100644 index 0000000..90b8934 --- /dev/null +++ b/lib/isc/include/isc/pool.h @@ -0,0 +1,138 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/***** +***** Module Info +*****/ + +/*! \file isc/pool.h + * \brief An object pool is a mechanism for sharing a small pool of + * fungible objects among a large number of objects that depend on them. + * + * This is useful, for example, when it causes performance problems for + * large number of zones to share a single memory context or task object, + * but it would create a different set of problems for them each to have an + * independent task or memory context. + */ + +/*** + *** Imports. + ***/ + +#include <isc/lang.h> +#include <isc/mem.h> +#include <isc/types.h> + +ISC_LANG_BEGINDECLS + +/***** +***** Types. +*****/ + +typedef void (*isc_pooldeallocator_t)(void **object); + +typedef isc_result_t (*isc_poolinitializer_t)(void **target, void *arg); + +typedef struct isc_pool isc_pool_t; + +/***** +***** Functions. +*****/ + +isc_result_t +isc_pool_create(isc_mem_t *mctx, unsigned int count, isc_pooldeallocator_t free, + isc_poolinitializer_t init, void *initarg, isc_pool_t **poolp); +/*%< + * Create a pool of "count" object pointers. If 'free' is not NULL, + * it points to a function that will detach the objects. 'init' + * points to a function that will initialize the arguments, and + * 'arg' to an argument to be passed into that function (for example, + * a relevant manager or context object). + * + * Requires: + * + *\li 'mctx' is a valid memory context. + * + *\li init != NULL + * + *\li poolp != NULL && *poolp == NULL + * + * Ensures: + * + *\li On success, '*poolp' points to the new object pool. + * + * Returns: + * + *\li #ISC_R_SUCCESS + *\li #ISC_R_NOMEMORY + *\li #ISC_R_UNEXPECTED + */ + +void * +isc_pool_get(isc_pool_t *pool); +/*%< + * Returns a pointer to an object from the pool. Currently the object + * is chosen from the pool at random. (This may be changed in the future + * to something that guaratees balance.) + */ + +int +isc_pool_count(isc_pool_t *pool); +/*%< + * Returns the number of objcts in the pool 'pool'. + */ + +isc_result_t +isc_pool_expand(isc_pool_t **sourcep, unsigned int count, isc_pool_t **targetp); + +/*%< + * If 'size' is larger than the number of objects in the pool pointed to by + * 'sourcep', then a new pool of size 'count' is allocated, the existing + * objects are copied into it, additional ones created to bring the + * total number up to 'count', and the resulting pool is attached to + * 'targetp'. + * + * If 'count' is less than or equal to the number of objects in 'source', then + * 'sourcep' is attached to 'targetp' without any other action being taken. + * + * In either case, 'sourcep' is detached. + * + * Requires: + * + * \li 'sourcep' is not NULL and '*source' is not NULL + * \li 'targetp' is not NULL and '*source' is NULL + * + * Ensures: + * + * \li On success, '*targetp' points to a valid task pool. + * \li On success, '*sourcep' points to NULL. + * + * Returns: + * + * \li #ISC_R_SUCCESS + * \li #ISC_R_NOMEMORY + */ + +void +isc_pool_destroy(isc_pool_t **poolp); +/*%< + * Destroy a task pool. The tasks in the pool are detached but not + * shut down. + * + * Requires: + * \li '*poolp' is a valid task pool. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/portset.h b/lib/isc/include/isc/portset.h new file mode 100644 index 0000000..fa5d51e --- /dev/null +++ b/lib/isc/include/isc/portset.h @@ -0,0 +1,135 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +/*! \file isc/portset.h + * \brief Transport Protocol Port Manipulation Module + * + * This module provides simple utilities to handle a set of transport protocol + * (UDP or TCP) port numbers, e.g., for creating an ACL list. An isc_portset_t + * object is an opaque instance of a port set, for which the user can add or + * remove a specific port or a range of consecutive ports. This object is + * expected to be used as a temporary work space only, and does not protect + * simultaneous access from multiple threads. Therefore it must not be stored + * in a place that can be accessed from multiple threads. + */ + +#pragma once + +/*** + *** Imports + ***/ + +#include <stdbool.h> + +#include <isc/net.h> + +/*** + *** Functions + ***/ + +ISC_LANG_BEGINDECLS + +isc_result_t +isc_portset_create(isc_mem_t *mctx, isc_portset_t **portsetp); +/*%< + * Create a port set and initialize it as an empty set. + * + * Requires: + *\li 'mctx' to be valid. + *\li 'portsetp' to be non NULL and '*portsetp' to be NULL; + * + * Returns: + *\li #ISC_R_SUCCESS + *\li #ISC_R_NOMEMORY + */ + +void +isc_portset_destroy(isc_mem_t *mctx, isc_portset_t **portsetp); +/*%< + * Destroy a port set. + * + * Requires: + *\li 'mctx' to be valid and must be the same context given when the port set + * was created. + *\li '*portsetp' to be a valid set. + */ + +bool +isc_portset_isset(isc_portset_t *portset, in_port_t port); +/*%< + * Test whether the given port is stored in the portset. + * + * Requires: + *\li 'portset' to be a valid set. + * + * Returns + * \li #true if the port is found, false otherwise. + */ + +unsigned int +isc_portset_nports(isc_portset_t *portset); +/*%< + * Provides the number of ports stored in the given portset. + * + * Requires: + *\li 'portset' to be a valid set. + * + * Returns + * \li the number of ports stored in portset. + */ + +void +isc_portset_add(isc_portset_t *portset, in_port_t port); +/*%< + * Add the given port to the portset. The port may or may not be stored in + * the portset. + * + * Requires: + *\li 'portlist' to be valid. + */ + +void +isc_portset_remove(isc_portset_t *portset, in_port_t port); +/*%< + * Remove the given port to the portset. The port may or may not be stored in + * the portset. + * + * Requires: + *\li 'portlist' to be valid. + */ + +void +isc_portset_addrange(isc_portset_t *portset, in_port_t port_lo, + in_port_t port_hi); +/*%< + * Add a subset of [port_lo, port_hi] (inclusive) to the portset. Ports in the + * subset may or may not be stored in portset. + * + * Requires: + *\li 'portlist' to be valid. + *\li port_lo <= port_hi + */ + +void +isc_portset_removerange(isc_portset_t *portset, in_port_t port_lo, + in_port_t port_hi); +/*%< + * Subtract a subset of [port_lo, port_hi] (inclusive) from the portset. Ports + * in the subset may or may not be stored in portset. + * + * Requires: + *\li 'portlist' to be valid. + *\li port_lo <= port_hi + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/print.h b/lib/isc/include/isc/print.h new file mode 100644 index 0000000..d48bf70 --- /dev/null +++ b/lib/isc/include/isc/print.h @@ -0,0 +1,29 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/print.h */ + +/*** + *** Imports + ***/ + +#include <isc/formatcheck.h> /* Required for ISC_FORMAT_PRINTF() macro. */ +#include <isc/lang.h> + +/*** + *** Functions + ***/ + +#include <stdio.h> diff --git a/lib/isc/include/isc/quota.h b/lib/isc/include/isc/quota.h new file mode 100644 index 0000000..2a25fa1 --- /dev/null +++ b/lib/isc/include/isc/quota.h @@ -0,0 +1,154 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/***** +***** Module Info +*****/ + +/*! \file isc/quota.h + * + * \brief The isc_quota_t object is a simple helper object for implementing + * quotas on things like the number of simultaneous connections to + * a server. It keeps track of the amount of quota in use, and + * encapsulates the locking necessary to allow multiple tasks to + * share a quota. + */ + +/*** + *** Imports. + ***/ + +#include <isc/atomic.h> +#include <isc/lang.h> +#include <isc/magic.h> +#include <isc/mutex.h> +#include <isc/types.h> + +/***** +***** Types. +*****/ + +ISC_LANG_BEGINDECLS + +/*% isc_quota_cb - quota callback structure */ +typedef struct isc_quota_cb isc_quota_cb_t; +typedef void (*isc_quota_cb_func_t)(isc_quota_t *quota, void *data); +struct isc_quota_cb { + int magic; + isc_quota_cb_func_t cb_func; + void *data; + ISC_LINK(isc_quota_cb_t) link; +}; + +/*% isc_quota structure */ +struct isc_quota { + int magic; + atomic_uint_fast32_t max; + atomic_uint_fast32_t used; + atomic_uint_fast32_t soft; + atomic_uint_fast32_t waiting; + isc_mutex_t cblock; + ISC_LIST(isc_quota_cb_t) cbs; + ISC_LINK(isc_quota_t) link; +}; + +void +isc_quota_init(isc_quota_t *quota, unsigned int max); +/*%< + * Initialize a quota object. + */ + +void +isc_quota_destroy(isc_quota_t *quota); +/*%< + * Destroy a quota object. + */ + +void +isc_quota_soft(isc_quota_t *quota, unsigned int soft); +/*%< + * Set a soft quota. + */ + +void +isc_quota_max(isc_quota_t *quota, unsigned int max); +/*%< + * Re-set a maximum quota. + */ + +unsigned int +isc_quota_getmax(isc_quota_t *quota); +/*%< + * Get the maximum quota. + */ + +unsigned int +isc_quota_getsoft(isc_quota_t *quota); +/*%< + * Get the soft quota. + */ + +unsigned int +isc_quota_getused(isc_quota_t *quota); +/*%< + * Get the current usage of quota. + */ + +isc_result_t +isc_quota_attach(isc_quota_t *quota, isc_quota_t **p); +/*%< + * + * Attempt to reserve one unit of 'quota', and also attaches '*p' to the quota + * if successful (ISC_R_SUCCESS or ISC_R_SOFTQUOTA). + * + * Returns: + * \li #ISC_R_SUCCESS Success + * \li #ISC_R_SOFTQUOTA Success soft quota reached + * \li #ISC_R_QUOTA Quota is full + */ + +isc_result_t +isc_quota_attach_cb(isc_quota_t *quota, isc_quota_t **p, isc_quota_cb_t *cb); +/*%< + * + * Like isc_quota_attach(), but if there's no quota left then cb->cb_func will + * be called when we are attached to quota. + * + * Note: It's the caller's responsibility to make sure that we don't end up + * with a huge number of callbacks waiting, making it easy to create a + * resource exhaustion attack. For example, in the case of TCP listening, + * we simply don't accept new connections when the quota is exceeded, so + * the number of callbacks waiting in the queue will be limited by the + * listen() backlog. + * + * Returns: + * \li #ISC_R_SUCCESS Success + * \li #ISC_R_SOFTQUOTA Success soft quota reached + * \li #ISC_R_QUOTA Quota is full + */ + +void +isc_quota_cb_init(isc_quota_cb_t *cb, isc_quota_cb_func_t cb_func, void *data); +/*%< + * Initialize isc_quota_cb_t - setup the list, set the callback and data. + */ + +void +isc_quota_detach(isc_quota_t **p); +/*%< + * Release one unit of quota, and also detaches '*p' from the quota. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/radix.h b/lib/isc/include/isc/radix.h new file mode 100644 index 0000000..9a91118 --- /dev/null +++ b/lib/isc/include/isc/radix.h @@ -0,0 +1,221 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#include <inttypes.h> +#include <string.h> + +#include <isc/magic.h> +#include <isc/mutex.h> +#include <isc/net.h> +#include <isc/refcount.h> +#include <isc/types.h> + +#define NETADDR_TO_PREFIX_T(na, pt, bits) \ + do { \ + const void *p = na; \ + memset(&(pt), 0, sizeof(pt)); \ + if (p != NULL) { \ + (pt).family = (na)->family; \ + (pt).bitlen = (bits); \ + if ((pt).family == AF_INET6) { \ + memmove(&(pt).add.sin6, &(na)->type.in6, \ + ((bits) + 7) / 8); \ + } else \ + memmove(&(pt).add.sin, &(na)->type.in, \ + ((bits) + 7) / 8); \ + } else { \ + (pt).family = AF_UNSPEC; \ + (pt).bitlen = 0; \ + } \ + isc_refcount_init(&(pt).refcount, 0); \ + } while (0) + +typedef struct isc_prefix { + isc_mem_t *mctx; + unsigned int family; /* AF_INET | AF_INET6, or AF_UNSPEC for + * "any" */ + unsigned int bitlen; /* 0 for "any" */ + isc_refcount_t refcount; + union { + struct in_addr sin; + struct in6_addr sin6; + } add; +} isc_prefix_t; + +typedef void (*isc_radix_destroyfunc_t)(void *); +typedef void (*isc_radix_processfunc_t)(isc_prefix_t *, void **); + +#define isc_prefix_tochar(prefix) ((char *)&(prefix)->add.sin) +#define isc_prefix_touchar(prefix) ((u_char *)&(prefix)->add.sin) + +/* + * We need "first match" when we search the radix tree to preserve + * compatibility with the existing ACL implementation. Radix trees + * naturally lend themselves to "best match". In order to get "first match" + * behavior, we keep track of the order in which entries are added to the + * tree--and when a search is made, we find all matching entries, and + * return the one that was added first. + * + * An IPv4 prefix and an IPv6 prefix may share a radix tree node if they + * have the same length and bit pattern (e.g., 127/8 and 7f::/8). To + * disambiguate between them, node_num and data are two-element arrays: + * + * - node_num[0] and data[0] are used for IPv4 client addresses + * - node_num[1] and data[1] are used for IPv6 client addresses + * + * A prefix of 0/0 (aka "any" or "none"), is always stored as IPv4, + * but matches all IPv6 addresses too. + */ + +#define RADIX_V4 0 +#define RADIX_V6 1 +#define RADIX_FAMILIES 2 + +#define ISC_RADIX_FAMILY(p) (((p)->family == AF_INET6) ? RADIX_V6 : RADIX_V4) + +typedef struct isc_radix_node { + isc_mem_t *mctx; + uint32_t bit; /* bit length of the prefix */ + isc_prefix_t *prefix; /* who we are in radix tree */ + struct isc_radix_node *l, *r; /* left and right children */ + struct isc_radix_node *parent; /* may be used */ + void *data[RADIX_FAMILIES]; /* pointers to IPv4 + * and IPV6 data */ + int node_num[RADIX_FAMILIES]; /* which node + * this was in + * the tree, + * or -1 for glue + * nodes */ +} isc_radix_node_t; + +#define RADIX_TREE_MAGIC ISC_MAGIC('R', 'd', 'x', 'T'); +#define RADIX_TREE_VALID(a) ISC_MAGIC_VALID(a, RADIX_TREE_MAGIC); + +typedef struct isc_radix_tree { + unsigned int magic; + isc_mem_t *mctx; + isc_radix_node_t *head; + uint32_t maxbits; /* for IP, 32 bit addresses */ + int num_active_node; /* for debugging purposes */ + int num_added_node; /* total number of nodes */ +} isc_radix_tree_t; + +isc_result_t +isc_radix_search(isc_radix_tree_t *radix, isc_radix_node_t **target, + isc_prefix_t *prefix); +/*%< + * Search 'radix' for the best match to 'prefix'. + * Return the node found in '*target'. + * + * Requires: + * \li 'radix' to be valid. + * \li 'target' is not NULL and "*target" is NULL. + * \li 'prefix' to be valid. + * + * Returns: + * \li ISC_R_NOTFOUND + * \li ISC_R_SUCCESS + */ + +isc_result_t +isc_radix_insert(isc_radix_tree_t *radix, isc_radix_node_t **target, + isc_radix_node_t *source, isc_prefix_t *prefix); +/*%< + * Insert 'source' or 'prefix' into the radix tree 'radix'. + * Return the node added in 'target'. + * + * Requires: + * \li 'radix' to be valid. + * \li 'target' is not NULL and "*target" is NULL. + * \li 'prefix' to be valid or 'source' to be non NULL and contain + * a valid prefix. + * + * Returns: + * \li ISC_R_NOMEMORY + * \li ISC_R_SUCCESS + */ + +void +isc_radix_remove(isc_radix_tree_t *radix, isc_radix_node_t *node); +/*%< + * Remove the node 'node' from the radix tree 'radix'. + * + * Requires: + * \li 'radix' to be valid. + * \li 'node' to be valid. + */ + +isc_result_t +isc_radix_create(isc_mem_t *mctx, isc_radix_tree_t **target, int maxbits); +/*%< + * Create a radix tree with a maximum depth of 'maxbits'; + * + * Requires: + * \li 'mctx' to be valid. + * \li 'target' to be non NULL and '*target' to be NULL. + * \li 'maxbits' to be less than or equal to RADIX_MAXBITS. + * + * Returns: + * \li ISC_R_NOMEMORY + * \li ISC_R_SUCCESS + */ + +void +isc_radix_destroy(isc_radix_tree_t *radix, isc_radix_destroyfunc_t func); +/*%< + * Destroy a radix tree optionally calling 'func' to clean up node data. + * + * Requires: + * \li 'radix' to be valid. + */ + +void +isc_radix_process(isc_radix_tree_t *radix, isc_radix_processfunc_t func); +/*%< + * Walk a radix tree calling 'func' to process node data. + * + * Requires: + * \li 'radix' to be valid. + * \li 'func' to point to a function. + */ + +#define RADIX_MAXBITS 128 +#define RADIX_NBIT(x) (0x80 >> ((x)&0x7f)) +#define RADIX_NBYTE(x) ((x) >> 3) + +#define RADIX_WALK(Xhead, Xnode) \ + do { \ + isc_radix_node_t *Xstack[RADIX_MAXBITS + 1]; \ + isc_radix_node_t **Xsp = Xstack; \ + isc_radix_node_t *Xrn = (Xhead); \ + while ((Xnode = Xrn)) { \ + if (Xnode->prefix) + +#define RADIX_WALK_END \ + if (Xrn->l) { \ + if (Xrn->r) { \ + *Xsp++ = Xrn->r; \ + } \ + Xrn = Xrn->l; \ + } else if (Xrn->r) { \ + Xrn = Xrn->r; \ + } else if (Xsp != Xstack) { \ + Xrn = *(--Xsp); \ + } else { \ + Xrn = (isc_radix_node_t *)0; \ + } \ + } \ + } \ + while (0) diff --git a/lib/isc/include/isc/random.h b/lib/isc/include/isc/random.h new file mode 100644 index 0000000..1e30d0c --- /dev/null +++ b/lib/isc/include/isc/random.h @@ -0,0 +1,65 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#include <inttypes.h> +#include <stdlib.h> + +#include <isc/lang.h> +#include <isc/types.h> + +/*! \file isc/random.h + * \brief Implements wrapper around a non-cryptographically secure + * pseudo-random number generator. + * + */ + +ISC_LANG_BEGINDECLS + +uint8_t +isc_random8(void); +/*!< + * \brief Returns a single 8-bit random value. + */ + +uint16_t +isc_random16(void); +/*!< + * \brief Returns a single 16-bit random value. + */ + +uint32_t +isc_random32(void); +/*!< + * \brief Returns a single 32-bit random value. + */ + +void +isc_random_buf(void *buf, size_t buflen); +/*!< + * \brief Fills the region buf of length buflen with random data. + */ + +uint32_t +isc_random_uniform(uint32_t upper_bound); +/*!< + * \brief Will return a single 32-bit value, uniformly distributed but + * less than upper_bound. This is recommended over + * constructions like ``isc_random() % upper_bound'' as it + * avoids "modulo bias" when the upper bound is not a power of + * two. In the worst case, this function may require multiple + * iterations to ensure uniformity. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/ratelimiter.h b/lib/isc/include/isc/ratelimiter.h new file mode 100644 index 0000000..45ec447 --- /dev/null +++ b/lib/isc/include/isc/ratelimiter.h @@ -0,0 +1,145 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/***** +***** Module Info +*****/ + +/*! \file isc/ratelimiter.h + * \brief A rate limiter is a mechanism for dispatching events at a limited + * rate. This is intended to be used when sending zone maintenance + * SOA queries, NOTIFY messages, etc. + */ + +/*** + *** Imports. + ***/ + +#include <inttypes.h> +#include <stdbool.h> + +#include <isc/lang.h> +#include <isc/types.h> + +ISC_LANG_BEGINDECLS + +/***** +***** Functions. +*****/ + +isc_result_t +isc_ratelimiter_create(isc_mem_t *mctx, isc_timermgr_t *timermgr, + isc_task_t *task, isc_ratelimiter_t **ratelimiterp); +/*%< + * Create a rate limiter. The execution interval is initially undefined. + */ + +isc_result_t +isc_ratelimiter_setinterval(isc_ratelimiter_t *rl, isc_interval_t *interval); +/*!< + * Set the minimum interval between event executions. + * The interval value is copied, so the caller need not preserve it. + * + * Requires: + * '*interval' is a nonzero interval. + */ + +void +isc_ratelimiter_setpertic(isc_ratelimiter_t *rl, uint32_t perint); +/*%< + * Set the number of events processed per interval timer tick. + * If 'perint' is zero it is treated as 1. + */ + +void +isc_ratelimiter_setpushpop(isc_ratelimiter_t *rl, bool pushpop); +/*%< + * Set / clear the ratelimiter to from push pop mode rather + * first in - first out mode (default). + */ + +isc_result_t +isc_ratelimiter_enqueue(isc_ratelimiter_t *rl, isc_task_t *task, + isc_event_t **eventp); +/*%< + * Queue an event for rate-limited execution. + * + * This is similar + * to doing an isc_task_send() to the 'task', except that the + * execution may be delayed to achieve the desired rate of + * execution. + * + * '(*eventp)->ev_sender' is used to hold the task. The caller + * must ensure that the task exists until the event is delivered. + * + * Requires: + *\li An interval has been set by calling + * isc_ratelimiter_setinterval(). + * + *\li 'task' to be non NULL. + *\li '(*eventp)->ev_sender' to be NULL. + */ + +isc_result_t +isc_ratelimiter_dequeue(isc_ratelimiter_t *rl, isc_event_t *event); +/* + * Dequeue a event off the ratelimiter queue. + * + * Returns: + * \li ISC_R_NOTFOUND if the event is no longer linked to the rate limiter. + * \li ISC_R_SUCCESS + */ + +void +isc_ratelimiter_shutdown(isc_ratelimiter_t *ratelimiter); +/*%< + * Shut down a rate limiter. + * + * Ensures: + *\li All events that have not yet been + * dispatched to the task are dispatched immediately with + * the #ISC_EVENTATTR_CANCELED bit set in ev_attributes. + * + *\li Further attempts to enqueue events will fail with + * #ISC_R_SHUTTINGDOWN. + * + *\li The rate limiter is no longer attached to its task. + */ + +void +isc_ratelimiter_attach(isc_ratelimiter_t *source, isc_ratelimiter_t **target); +/*%< + * Attach to a rate limiter. + */ + +void +isc_ratelimiter_detach(isc_ratelimiter_t **ratelimiterp); +/*%< + * Detach from a rate limiter. + */ + +isc_result_t +isc_ratelimiter_stall(isc_ratelimiter_t *rl); +/*%< + * Stall event processing. + */ + +isc_result_t +isc_ratelimiter_release(isc_ratelimiter_t *rl); +/*%< + * Release a stalled rate limiter. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/refcount.h b/lib/isc/include/isc/refcount.h new file mode 100644 index 0000000..6b1f7cd --- /dev/null +++ b/lib/isc/include/isc/refcount.h @@ -0,0 +1,244 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#include <inttypes.h> + +#include <isc/assertions.h> +#include <isc/atomic.h> +#include <isc/error.h> +#include <isc/lang.h> +#include <isc/mutex.h> +#include <isc/types.h> + +/*! \file isc/refcount.h + * \brief Implements a locked reference counter. + * + * These macros uses C11(-like) atomic functions to implement reference + * counting. The isc_refcount_t type must not be accessed directly. + */ + +ISC_LANG_BEGINDECLS + +typedef atomic_uint_fast32_t isc_refcount_t; + +/** \def isc_refcount_init(ref, n) + * \brief Initialize the reference counter. + * \param[in] ref pointer to reference counter. + * \param[in] n an initial number of references. + * \return nothing. + * + * \warning No memory barrier are being imposed here. + */ +#define isc_refcount_init(target, value) atomic_init(target, value) + +/** \def isc_refcount_current(ref) + * \brief Returns current number of references. + * \param[in] ref pointer to reference counter. + * \returns current value of reference counter. + * + * Undo implicit promotion to 64 bits in our Windows implementation of + * atomic_load_explicit() by casting to uint_fast32_t. + */ + +#define isc_refcount_current(target) (uint_fast32_t) atomic_load_acquire(target) + +/** \def isc_refcount_destroy(ref) + * \brief a destructor that makes sure that all references were cleared. + * \param[in] ref pointer to reference counter. + * \returns nothing. + */ +#define isc_refcount_destroy(target) \ + ISC_REQUIRE(isc_refcount_current(target) == 0) + +/** \def isc_refcount_increment0(ref) + * \brief increases reference counter by 1. + * \param[in] ref pointer to reference counter. + * \returns previous value of reference counter. + */ +#if _MSC_VER +static inline uint_fast32_t +isc_refcount_increment0(isc_refcount_t *target) { + uint_fast32_t __v; + __v = (uint_fast32_t)atomic_fetch_add_relaxed(target, 1); + INSIST(__v < UINT32_MAX); + return (__v); +} +#else /* _MSC_VER */ +#define isc_refcount_increment0(target) \ + ({ \ + uint_fast32_t __v; \ + __v = atomic_fetch_add_relaxed(target, 1); \ + INSIST(__v < UINT32_MAX); \ + __v; \ + }) +#endif /* _MSC_VER */ + +/** \def isc_refcount_increment(ref) + * \brief increases reference counter by 1. + * \param[in] ref pointer to reference counter. + * \returns previous value of reference counter. + */ +#if _MSC_VER +static inline uint_fast32_t +isc_refcount_increment(isc_refcount_t *target) { + uint_fast32_t __v; + __v = (uint_fast32_t)atomic_fetch_add_relaxed(target, 1); + INSIST(__v > 0 && __v < UINT32_MAX); + return (__v); +} +#else /* _MSC_VER */ +#define isc_refcount_increment(target) \ + ({ \ + uint_fast32_t __v; \ + __v = atomic_fetch_add_relaxed(target, 1); \ + INSIST(__v > 0 && __v < UINT32_MAX); \ + __v; \ + }) +#endif /* _MSC_VER */ + +/** \def isc_refcount_decrement(ref) + * \brief decreases reference counter by 1. + * \param[in] ref pointer to reference counter. + * \returns previous value of reference counter. + */ +#if _MSC_VER +static inline uint_fast32_t +isc_refcount_decrement(isc_refcount_t *target) { + uint_fast32_t __v; + __v = (uint_fast32_t)atomic_fetch_sub_acq_rel(target, 1); + INSIST(__v > 0); + return (__v); +} +#else /* _MSC_VER */ +#define isc_refcount_decrement(target) \ + ({ \ + uint_fast32_t __v; \ + __v = atomic_fetch_sub_acq_rel(target, 1); \ + INSIST(__v > 0); \ + __v; \ + }) +#endif /* _MSC_VER */ + +#define isc_refcount_decrementz(target) \ + do { \ + uint_fast32_t _refs = isc_refcount_decrement(target); \ + ISC_INSIST(_refs == 1); \ + } while (0) + +#define isc_refcount_decrement1(target) \ + do { \ + uint_fast32_t _refs = isc_refcount_decrement(target); \ + ISC_INSIST(_refs > 1); \ + } while (0) + +#define isc_refcount_decrement0(target) \ + do { \ + uint_fast32_t _refs = isc_refcount_decrement(target); \ + ISC_INSIST(_refs > 0); \ + } while (0) + +#define ISC_REFCOUNT_TRACE_DECL(name) \ + name##_t *name##__ref(name##_t *ptr, const char *func, \ + const char *file, unsigned int line); \ + void name##__unref(name##_t *ptr, const char *func, const char *file, \ + unsigned int line); \ + void name##__attach(name##_t *ptr, name##_t **ptrp, const char *func, \ + const char *file, unsigned int line); \ + void name##__detach(name##_t **ptrp, const char *func, \ + const char *file, unsigned int line) + +#define ISC_REFCOUNT_TRACE_IMPL(name, destroy) \ + name##_t *name##__ref(name##_t *ptr, const char *func, \ + const char *file, unsigned int line) { \ + REQUIRE(ptr != NULL); \ + uint_fast32_t refs = \ + isc_refcount_increment(&ptr->references) + 1; \ + fprintf(stderr, \ + "%s:%s:%s:%u:%p->references = %" PRIuFAST32 "\n", \ + __func__, func, file, line, ptr, refs); \ + return (ptr); \ + } \ + \ + void name##__unref(name##_t *ptr, const char *func, const char *file, \ + unsigned int line) { \ + REQUIRE(ptr != NULL); \ + uint_fast32_t refs = \ + isc_refcount_decrement(&ptr->references) - 1; \ + if (refs == 0) { \ + destroy(ptr); \ + } \ + fprintf(stderr, \ + "%s:%s:%s:%u:%p->references = %" PRIuFAST32 "\n", \ + __func__, func, file, line, ptr, refs); \ + } \ + void name##__attach(name##_t *ptr, name##_t **ptrp, const char *func, \ + const char *file, unsigned int line) { \ + REQUIRE(ptrp != NULL && *ptrp == NULL); \ + uint_fast32_t refs = \ + isc_refcount_increment(&ptr->references) + 1; \ + fprintf(stderr, \ + "%s:%s:%s:%u:%p->references = %" PRIuFAST32 "\n", \ + __func__, func, file, line, ptr, refs); \ + *ptrp = ptr; \ + } \ + \ + void name##__detach(name##_t **ptrp, const char *func, \ + const char *file, unsigned int line) { \ + REQUIRE(ptrp != NULL && *ptrp != NULL); \ + name##_t *ptr = *ptrp; \ + *ptrp = NULL; \ + uint_fast32_t refs = \ + isc_refcount_decrement(&ptr->references) - 1; \ + if (refs == 0) { \ + destroy(ptr); \ + } \ + fprintf(stderr, \ + "%s:%s:%s:%u:%p->references = %" PRIuFAST32 "\n", \ + __func__, func, file, line, ptr, refs); \ + } + +#define ISC_REFCOUNT_DECL(name) \ + name##_t *name##_ref(name##_t *ptr); \ + void name##_unref(name##_t *ptr); \ + void name##_attach(name##_t *ptr, name##_t **ptrp); \ + void name##_detach(name##_t **ptrp) + +#define ISC_REFCOUNT_IMPL(name, destroy) \ + name##_t *name##_ref(name##_t *ptr) { \ + REQUIRE(ptr != NULL); \ + isc_refcount_increment(&ptr->references); \ + return (ptr); \ + } \ + \ + void name##_unref(name##_t *ptr) { \ + REQUIRE(ptr != NULL); \ + if (isc_refcount_decrement(&ptr->references) == 1) { \ + destroy(ptr); \ + } \ + } \ + void name##_attach(name##_t *ptr, name##_t **ptrp) { \ + REQUIRE(ptrp != NULL && *ptrp == NULL); \ + name##_ref(ptr); \ + *ptrp = ptr; \ + } \ + \ + void name##_detach(name##_t **ptrp) { \ + REQUIRE(ptrp != NULL && *ptrp != NULL); \ + name##_t *ptr = *ptrp; \ + *ptrp = NULL; \ + name##_unref(ptr); \ + } + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/regex.h b/lib/isc/include/isc/regex.h new file mode 100644 index 0000000..989d7b1 --- /dev/null +++ b/lib/isc/include/isc/regex.h @@ -0,0 +1,33 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/regex.h */ + +#include <isc/lang.h> +#include <isc/types.h> + +ISC_LANG_BEGINDECLS + +int +isc_regex_validate(const char *expression); +/*%< + * Check a regular expression for syntactic correctness. + * + * Returns: + *\li -1 on error. + *\li the number of groups in the expression. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/region.h b/lib/isc/include/isc/region.h new file mode 100644 index 0000000..6f775cf --- /dev/null +++ b/lib/isc/include/isc/region.h @@ -0,0 +1,95 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/region.h */ + +#include <isc/lang.h> +#include <isc/types.h> + +struct isc_region { + unsigned char *base; + unsigned int length; +}; + +struct isc_textregion { + char *base; + unsigned int length; +}; + +/* XXXDCL questionable ... bears discussion. we have been putting off + * discussing the region api. + */ +struct isc_constregion { + const void *base; + unsigned int length; +}; + +struct isc_consttextregion { + const char *base; + unsigned int length; +}; + +/*@{*/ +/*! + * The region structure is not opaque, and is usually directly manipulated. + * Some macros are defined below for convenience. + */ + +#define isc_region_consume(r, l) \ + do { \ + isc_region_t *_r = (r); \ + unsigned int _l = (l); \ + INSIST(_r->length >= _l); \ + _r->base += _l; \ + _r->length -= _l; \ + } while (0) + +#define isc_textregion_consume(r, l) \ + do { \ + isc_textregion_t *_r = (r); \ + unsigned int _l = (l); \ + INSIST(_r->length >= _l); \ + _r->base += _l; \ + _r->length -= _l; \ + } while (0) + +#define isc_constregion_consume(r, l) \ + do { \ + isc_constregion_t *_r = (r); \ + unsigned int _l = (l); \ + INSIST(_r->length >= _l); \ + _r->base += _l; \ + _r->length -= _l; \ + } while (0) +/*@}*/ + +ISC_LANG_BEGINDECLS + +int +isc_region_compare(isc_region_t *r1, isc_region_t *r2); +/*%< + * Compares the contents of two regions + * + * Requires: + *\li 'r1' is a valid region + *\li 'r2' is a valid region + * + * Returns: + *\li < 0 if r1 is lexicographically less than r2 + *\li = 0 if r1 is lexicographically identical to r2 + *\li > 0 if r1 is lexicographically greater than r2 + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/resource.h b/lib/isc/include/isc/resource.h new file mode 100644 index 0000000..dc4b2b1 --- /dev/null +++ b/lib/isc/include/isc/resource.h @@ -0,0 +1,87 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/resource.h */ + +#include <isc/lang.h> +#include <isc/types.h> + +#define ISC_RESOURCE_UNLIMITED ((isc_resourcevalue_t)UINT64_MAX) + +ISC_LANG_BEGINDECLS + +isc_result_t +isc_resource_setlimit(isc_resource_t resource, isc_resourcevalue_t value); +/*%< + * Set the maximum limit for a system resource. + * + * Notes: + *\li If 'value' exceeds the maximum possible on the operating system, + * it is silently limited to that maximum -- or to "infinity", if + * the operating system has that concept. #ISC_RESOURCE_UNLIMITED + * can be used to explicitly ask for the maximum. + * + * Requires: + *\li 'resource' is a valid member of the isc_resource_t enumeration. + * + * Returns: + *\li #ISC_R_SUCCESS Success. + *\li #ISC_R_NOTIMPLEMENTED 'resource' is not a type known by the OS. + *\li #ISC_R_NOPERM The calling process did not have adequate permission + * to change the resource limit. + */ + +isc_result_t +isc_resource_getlimit(isc_resource_t resource, isc_resourcevalue_t *value); +/*%< + * Get the maximum limit for a system resource. + * + * Notes: + *\li 'value' is set to the maximum limit. + * + *\li #ISC_RESOURCE_UNLIMITED is the maximum value of isc_resourcevalue_t. + * + *\li On many (all?) Unix systems, RLIM_INFINITY is a valid value that is + * significantly less than #ISC_RESOURCE_UNLIMITED, but which in practice + * behaves the same. + * + *\li The current ISC libdns configuration file parser assigns a value + * of UINT32_MAX for a size_spec of "unlimited" and ISC_UNIT32_MAX - 1 + * for "default", the latter of which is supposed to represent "the + * limit that was in force when the server started". Since these are + * valid values in the middle of the range of isc_resourcevalue_t, + * there is the possibility for confusion over what exactly those + * particular values are supposed to represent in a particular context -- + * discrete integral values or generalized concepts. + * + * Requires: + *\li 'resource' is a valid member of the isc_resource_t enumeration. + * + * Returns: + *\li #ISC_R_SUCCESS Success. + *\li #ISC_R_NOTIMPLEMENTED 'resource' is not a type known by the OS. + */ + +isc_result_t +isc_resource_getcurlimit(isc_resource_t resource, isc_resourcevalue_t *value); +/*%< + * Same as isc_resource_getlimit(), but returns the current (soft) limit. + * + * Returns: + *\li #ISC_R_SUCCESS Success. + *\li #ISC_R_NOTIMPLEMENTED 'resource' is not a type known by the OS. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/result.h b/lib/isc/include/isc/result.h new file mode 100644 index 0000000..a43772e --- /dev/null +++ b/lib/isc/include/isc/result.h @@ -0,0 +1,293 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/result.h */ + +#include <inttypes.h> + +#include <isc/lang.h> + +typedef enum isc_result { + ISC_R_SUCCESS, /*%< success */ + ISC_R_NOMEMORY, /*%< out of memory */ + ISC_R_TIMEDOUT, /*%< timed out */ + ISC_R_NOTHREADS, /*%< no available threads */ + ISC_R_ADDRNOTAVAIL, /*%< address not available */ + ISC_R_ADDRINUSE, /*%< address in use */ + ISC_R_NOPERM, /*%< permission denied */ + ISC_R_NOCONN, /*%< no pending connections */ + ISC_R_NETUNREACH, /*%< network unreachable */ + ISC_R_HOSTUNREACH, /*%< host unreachable */ + ISC_R_NETDOWN, /*%< network down */ + ISC_R_HOSTDOWN, /*%< host down */ + ISC_R_CONNREFUSED, /*%< connection refused */ + ISC_R_NORESOURCES, /*%< not enough free resources */ + ISC_R_EOF, /*%< end of file */ + ISC_R_BOUND, /*%< socket already bound */ + ISC_R_RELOAD, /*%< reload */ + ISC_R_SUSPEND = ISC_R_RELOAD, /*%< alias of 'reload' */ + ISC_R_LOCKBUSY, /*%< lock busy */ + ISC_R_EXISTS, /*%< already exists */ + ISC_R_NOSPACE, /*%< ran out of space */ + ISC_R_CANCELED, /*%< operation canceled */ + ISC_R_NOTBOUND, /*%< socket is not bound */ + ISC_R_SHUTTINGDOWN, /*%< shutting down */ + ISC_R_NOTFOUND, /*%< not found */ + ISC_R_UNEXPECTEDEND, /*%< unexpected end of input */ + ISC_R_FAILURE, /*%< generic failure */ + ISC_R_IOERROR, /*%< I/O error */ + ISC_R_NOTIMPLEMENTED, /*%< not implemented */ + ISC_R_UNBALANCED, /*%< unbalanced parentheses */ + ISC_R_NOMORE, /*%< no more */ + ISC_R_INVALIDFILE, /*%< invalid file */ + ISC_R_BADBASE64, /*%< bad base64 encoding */ + ISC_R_UNEXPECTEDTOKEN, /*%< unexpected token */ + ISC_R_QUOTA, /*%< quota reached */ + ISC_R_UNEXPECTED, /*%< unexpected error */ + ISC_R_ALREADYRUNNING, /*%< already running */ + ISC_R_IGNORE, /*%< ignore */ + ISC_R_MASKNONCONTIG, /*%< addr mask not contiguous */ + ISC_R_FILENOTFOUND, /*%< file not found */ + ISC_R_FILEEXISTS, /*%< file already exists */ + ISC_R_NOTCONNECTED, /*%< socket is not connected */ + ISC_R_RANGE, /*%< out of range */ + ISC_R_NOENTROPY, /*%< out of entropy */ + ISC_R_MULTICAST, /*%< invalid use of multicast */ + ISC_R_NOTFILE, /*%< not a file */ + ISC_R_NOTDIRECTORY, /*%< not a directory */ + ISC_R_EMPTY, /*%< queue is empty */ + ISC_R_FAMILYMISMATCH, /*%< address family mismatch */ + ISC_R_FAMILYNOSUPPORT, /*%< AF not supported */ + ISC_R_BADHEX, /*%< bad hex encoding */ + ISC_R_TOOMANYOPENFILES, /*%< too many open files */ + ISC_R_NOTBLOCKING, /*%< not blocking */ + ISC_R_UNBALANCEDQUOTES, /*%< unbalanced quotes */ + ISC_R_INPROGRESS, /*%< operation in progress */ + ISC_R_CONNECTIONRESET, /*%< connection reset */ + ISC_R_SOFTQUOTA, /*%< soft quota reached */ + ISC_R_BADNUMBER, /*%< not a valid number */ + ISC_R_DISABLED, /*%< disabled */ + ISC_R_MAXSIZE, /*%< max size */ + ISC_R_BADADDRESSFORM, /*%< invalid address format */ + ISC_R_BADBASE32, /*%< bad base32 encoding */ + ISC_R_UNSET, /*%< unset */ + ISC_R_MULTIPLE, /*%< multiple */ + ISC_R_WOULDBLOCK, /*%< would block */ + ISC_R_COMPLETE, /*%< complete */ + ISC_R_CRYPTOFAILURE, /*%< cryptography library failure */ + ISC_R_DISCQUOTA, /*%< disc quota */ + ISC_R_DISCFULL, /*%< disc full */ + ISC_R_DEFAULT, /*%< default */ + ISC_R_IPV4PREFIX, /*%< IPv4 prefix */ + ISC_R_TLSERROR, /*%< TLS error */ + ISC_R_TLSBADPEERCERT, /*%< TLS peer certificate verification failed */ + ISC_R_HTTP2ALPNERROR, /*%< ALPN for HTTP/2 failed */ + ISC_R_DOTALPNERROR, /*%< ALPN for DoT failed */ + ISC_R_INVALIDPROTO, /*%< invalid protocol */ + + DNS_R_LABELTOOLONG, + DNS_R_BADESCAPE, + DNS_R_EMPTYLABEL, + DNS_R_BADDOTTEDQUAD, + DNS_R_INVALIDNS, + DNS_R_UNKNOWN, + DNS_R_BADLABELTYPE, + DNS_R_BADPOINTER, + DNS_R_TOOMANYHOPS, + DNS_R_DISALLOWED, + DNS_R_EXTRATOKEN, + DNS_R_EXTRADATA, + DNS_R_TEXTTOOLONG, + DNS_R_NOTZONETOP, + DNS_R_SYNTAX, + DNS_R_BADCKSUM, + DNS_R_BADAAAA, + DNS_R_NOOWNER, + DNS_R_NOTTL, + DNS_R_BADCLASS, + DNS_R_NAMETOOLONG, + DNS_R_PARTIALMATCH, + DNS_R_NEWORIGIN, + DNS_R_UNCHANGED, + DNS_R_BADTTL, + DNS_R_NOREDATA, + DNS_R_CONTINUE, + DNS_R_DELEGATION, + DNS_R_GLUE, + DNS_R_DNAME, + DNS_R_CNAME, + DNS_R_BADDB, + DNS_R_ZONECUT, + DNS_R_BADZONE, + DNS_R_MOREDATA, + DNS_R_UPTODATE, + DNS_R_TSIGVERIFYFAILURE, + DNS_R_TSIGERRORSET, + DNS_R_SIGINVALID, + DNS_R_SIGEXPIRED, + DNS_R_SIGFUTURE, + DNS_R_KEYUNAUTHORIZED, + DNS_R_INVALIDTIME, + DNS_R_EXPECTEDTSIG, + DNS_R_UNEXPECTEDTSIG, + DNS_R_INVALIDTKEY, + DNS_R_HINT, + DNS_R_DROP, + DNS_R_NOTLOADED, + DNS_R_NCACHENXDOMAIN, + DNS_R_NCACHENXRRSET, + DNS_R_WAIT, + DNS_R_NOTVERIFIEDYET, + DNS_R_NOIDENTITY, + DNS_R_NOJOURNAL, + DNS_R_ALIAS, + DNS_R_USETCP, + DNS_R_NOVALIDSIG, + DNS_R_NOVALIDNSEC, + DNS_R_NOTINSECURE, + DNS_R_UNKNOWNSERVICE, + DNS_R_RECOVERABLE, + DNS_R_UNKNOWNOPT, + DNS_R_UNEXPECTEDID, + DNS_R_SEENINCLUDE, + DNS_R_NOTEXACT, + DNS_R_BLACKHOLED, + DNS_R_BADALG, + DNS_R_METATYPE, + DNS_R_CNAMEANDOTHER, + DNS_R_SINGLETON, + DNS_R_HINTNXRRSET, + DNS_R_NOMASTERFILE, + DNS_R_UNKNOWNPROTO, + DNS_R_CLOCKSKEW, + DNS_R_BADIXFR, + DNS_R_NOTAUTHORITATIVE, + DNS_R_NOVALIDKEY, + DNS_R_OBSOLETE, + DNS_R_FROZEN, + DNS_R_UNKNOWNFLAG, + DNS_R_EXPECTEDRESPONSE, + DNS_R_NOVALIDDS, + DNS_R_NSISADDRESS, + DNS_R_REMOTEFORMERR, + DNS_R_TRUNCATEDTCP, + DNS_R_LAME, + DNS_R_UNEXPECTEDRCODE, + DNS_R_UNEXPECTEDOPCODE, + DNS_R_CHASEDSSERVERS, + DNS_R_EMPTYNAME, + DNS_R_EMPTYWILD, + DNS_R_BADBITMAP, + DNS_R_FROMWILDCARD, + DNS_R_BADOWNERNAME, + DNS_R_BADNAME, + DNS_R_DYNAMIC, + DNS_R_UNKNOWNCOMMAND, + DNS_R_MUSTBESECURE, + DNS_R_COVERINGNSEC, + DNS_R_MXISADDRESS, + DNS_R_DUPLICATE, + DNS_R_INVALIDNSEC3, + DNS_R_NOTPRIMARY, + DNS_R_BROKENCHAIN, + DNS_R_EXPIRED, + DNS_R_NOTDYNAMIC, + DNS_R_BADEUI, + DNS_R_NTACOVERED, + DNS_R_BADCDS, + DNS_R_BADCDNSKEY, + DNS_R_OPTERR, + DNS_R_BADDNSTAP, + DNS_R_BADTSIG, + DNS_R_BADSIG0, + DNS_R_TOOMANYRECORDS, + DNS_R_VERIFYFAILURE, + DNS_R_ATZONETOP, + DNS_R_NOKEYMATCH, + DNS_R_TOOMANYKEYS, + DNS_R_KEYNOTACTIVE, + DNS_R_NSEC3ITERRANGE, + DNS_R_NSEC3SALTRANGE, + DNS_R_NSEC3BADALG, + DNS_R_NSEC3RESALT, + DNS_R_INCONSISTENTRR, + DNS_R_NOALPN, + + DST_R_UNSUPPORTEDALG, + DST_R_CRYPTOFAILURE, + /* compat */ + DST_R_OPENSSLFAILURE = DST_R_CRYPTOFAILURE, + DST_R_NOCRYPTO, + DST_R_NULLKEY, + DST_R_INVALIDPUBLICKEY, + DST_R_INVALIDPRIVATEKEY, + DST_R_WRITEERROR, + DST_R_INVALIDPARAM, + DST_R_SIGNFAILURE, + DST_R_VERIFYFAILURE, + DST_R_NOTPUBLICKEY, + DST_R_NOTPRIVATEKEY, + DST_R_KEYCANNOTCOMPUTESECRET, + DST_R_COMPUTESECRETFAILURE, + DST_R_NORANDOMNESS, + DST_R_BADKEYTYPE, + DST_R_NOENGINE, + DST_R_EXTERNALKEY, + + DNS_R_NOERROR, + DNS_R_FORMERR, + DNS_R_SERVFAIL, + DNS_R_NXDOMAIN, + DNS_R_NOTIMP, + DNS_R_REFUSED, + DNS_R_YXDOMAIN, + DNS_R_YXRRSET, + DNS_R_NXRRSET, + DNS_R_NOTAUTH, + DNS_R_NOTZONE, + DNS_R_RCODE11, + DNS_R_RCODE12, + DNS_R_RCODE13, + DNS_R_RCODE14, + DNS_R_RCODE15, + DNS_R_BADVERS, + DNS_R_BADCOOKIE = DNS_R_NOERROR + 23, + + ISCCC_R_UNKNOWNVERSION, + ISCCC_R_SYNTAX, + ISCCC_R_BADAUTH, + ISCCC_R_EXPIRED, + ISCCC_R_CLOCKSKEW, + ISCCC_R_DUPLICATE, + ISCCC_R_MAXDEPTH, + + ISC_R_NRESULTS, /*% The number of results. */ + ISC_R_MAKE_ENUM_32BIT = INT32_MAX, +} isc_result_t; + +ISC_LANG_BEGINDECLS + +const char *isc_result_totext(isc_result_t); +/*%< + * Convert an isc_result_t into a string message describing the result. + */ + +const char *isc_result_toid(isc_result_t); +/*%< + * Convert an isc_result_t into a string identifier such as + * "ISC_R_SUCCESS". + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/rwlock.h b/lib/isc/include/isc/rwlock.h new file mode 100644 index 0000000..a0d7083 --- /dev/null +++ b/lib/isc/include/isc/rwlock.h @@ -0,0 +1,103 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#include <inttypes.h> + +/*! \file isc/rwlock.h */ + +#include <isc/atomic.h> +#include <isc/condition.h> +#include <isc/lang.h> +#include <isc/types.h> + +ISC_LANG_BEGINDECLS + +typedef enum { + isc_rwlocktype_none = 0, + isc_rwlocktype_read, + isc_rwlocktype_write +} isc_rwlocktype_t; + +#if USE_PTHREAD_RWLOCK +#include <pthread.h> + +struct isc_rwlock { + pthread_rwlock_t rwlock; + atomic_bool downgrade; +}; + +#else /* USE_PTHREAD_RWLOCK */ + +struct isc_rwlock { + /* Unlocked. */ + unsigned int magic; + isc_mutex_t lock; + atomic_int_fast32_t spins; + + /* + * When some atomic instructions with hardware assistance are + * available, rwlock will use those so that concurrent readers do not + * interfere with each other through mutex as long as no writers + * appear, massively reducing the lock overhead in the typical case. + * + * The basic algorithm of this approach is the "simple + * writer-preference lock" shown in the following URL: + * http://www.cs.rochester.edu/u/scott/synchronization/pseudocode/rw.html + * but our implementation does not rely on the spin lock unlike the + * original algorithm to be more portable as a user space application. + */ + + /* Read or modified atomically. */ + atomic_int_fast32_t write_requests; + atomic_int_fast32_t write_completions; + atomic_int_fast32_t cnt_and_flag; + + /* Locked by lock. */ + isc_condition_t readable; + isc_condition_t writeable; + unsigned int readers_waiting; + + /* Locked by rwlock itself. */ + atomic_uint_fast32_t write_granted; + + /* Unlocked. */ + unsigned int write_quota; +}; + +#endif /* USE_PTHREAD_RWLOCK */ + +void +isc_rwlock_init(isc_rwlock_t *rwl, unsigned int read_quota, + unsigned int write_quota); + +isc_result_t +isc_rwlock_lock(isc_rwlock_t *rwl, isc_rwlocktype_t type); + +isc_result_t +isc_rwlock_trylock(isc_rwlock_t *rwl, isc_rwlocktype_t type); + +isc_result_t +isc_rwlock_unlock(isc_rwlock_t *rwl, isc_rwlocktype_t type); + +isc_result_t +isc_rwlock_tryupgrade(isc_rwlock_t *rwl); + +void +isc_rwlock_downgrade(isc_rwlock_t *rwl); + +void +isc_rwlock_destroy(isc_rwlock_t *rwl); + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/safe.h b/lib/isc/include/isc/safe.h new file mode 100644 index 0000000..35e7759 --- /dev/null +++ b/lib/isc/include/isc/safe.h @@ -0,0 +1,44 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/safe.h */ + +#include <isc/lang.h> + +ISC_LANG_BEGINDECLS + +int +isc_safe_memequal(const void *, const void *, size_t); + +/*%< + * Returns true iff. two blocks of memory are equal, otherwise + * false. + * + */ + +void +isc_safe_memwipe(void *, size_t); + +/*%< + * Clear the memory of length `len` pointed to by `ptr`. + * + * Some crypto code calls memset() on stack allocated buffers just + * before return so that they are wiped. Such memset() calls can be + * optimized away by the compiler. We provide this external non-inline C + * function to perform the memset operation so that the compiler cannot + * infer about what the function does and optimize the call away. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/serial.h b/lib/isc/include/isc/serial.h new file mode 100644 index 0000000..b7bfa5f --- /dev/null +++ b/lib/isc/include/isc/serial.h @@ -0,0 +1,69 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#include <inttypes.h> +#include <stdbool.h> + +#include <isc/lang.h> +#include <isc/types.h> + +/*! \file isc/serial.h + * \brief Implement 32 bit serial space arithmetic comparison functions. + * Note: Undefined results are returned as false. + */ + +/*** + *** Functions + ***/ + +ISC_LANG_BEGINDECLS + +bool +isc_serial_lt(uint32_t a, uint32_t b); +/*%< + * Return true if 'a' < 'b' otherwise false. + */ + +bool +isc_serial_gt(uint32_t a, uint32_t b); +/*%< + * Return true if 'a' > 'b' otherwise false. + */ + +bool +isc_serial_le(uint32_t a, uint32_t b); +/*%< + * Return true if 'a' <= 'b' otherwise false. + */ + +bool +isc_serial_ge(uint32_t a, uint32_t b); +/*%< + * Return true if 'a' >= 'b' otherwise false. + */ + +bool +isc_serial_eq(uint32_t a, uint32_t b); +/*%< + * Return true if 'a' == 'b' otherwise false. + */ + +bool +isc_serial_ne(uint32_t a, uint32_t b); +/*%< + * Return true if 'a' != 'b' otherwise false. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/siphash.h b/lib/isc/include/isc/siphash.h new file mode 100644 index 0000000..69d4742 --- /dev/null +++ b/lib/isc/include/isc/siphash.h @@ -0,0 +1,36 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +/*! \file isc/siphash.h */ + +#pragma once + +#include <isc/lang.h> +#include <isc/types.h> + +#define ISC_SIPHASH24_KEY_LENGTH 128 / 8 +#define ISC_SIPHASH24_TAG_LENGTH 64 / 8 + +#define ISC_HALFSIPHASH24_KEY_LENGTH 64 / 8 +#define ISC_HALFSIPHASH24_TAG_LENGTH 32 / 8 + +ISC_LANG_BEGINDECLS + +void +isc_siphash24(const uint8_t *key, const uint8_t *in, const size_t inlen, + uint8_t *out); +void +isc_halfsiphash24(const uint8_t *key, const uint8_t *in, const size_t inlen, + uint8_t *out); + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/sockaddr.h b/lib/isc/include/isc/sockaddr.h new file mode 100644 index 0000000..9f3986b --- /dev/null +++ b/lib/isc/include/isc/sockaddr.h @@ -0,0 +1,248 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/sockaddr.h */ + +#include <stdbool.h> + +#include <isc/lang.h> +#include <isc/net.h> +#include <isc/types.h> + +#include <sys/un.h> + +/* + * Any updates to this structure should also be applied in + * contrib/modules/dlz/dlz_minmal.h. + */ +struct isc_sockaddr { + union { + struct sockaddr sa; + struct sockaddr_in sin; + struct sockaddr_in6 sin6; + struct sockaddr_storage ss; + struct sockaddr_un sunix; + } type; + unsigned int length; /* XXXRTH beginning? */ + ISC_LINK(struct isc_sockaddr) link; +}; + +#define ISC_SOCKADDR_CMPADDR \ + 0x0001 /*%< compare the address \ + * sin_addr/sin6_addr */ +#define ISC_SOCKADDR_CMPPORT \ + 0x0002 /*%< compare the port \ + * sin_port/sin6_port */ +#define ISC_SOCKADDR_CMPSCOPE \ + 0x0004 /*%< compare the scope \ + * sin6_scope */ +#define ISC_SOCKADDR_CMPSCOPEZERO \ + 0x0008 /*%< when comparing scopes \ + * zero scopes always match */ + +ISC_LANG_BEGINDECLS + +bool +isc_sockaddr_compare(const isc_sockaddr_t *a, const isc_sockaddr_t *b, + unsigned int flags); +/*%< + * Compare the elements of the two address ('a' and 'b') as specified + * by 'flags' and report if they are equal or not. + * + * 'flags' is set from ISC_SOCKADDR_CMP*. + */ + +bool +isc_sockaddr_equal(const isc_sockaddr_t *a, const isc_sockaddr_t *b); +/*%< + * Return true iff the socket addresses 'a' and 'b' are equal. + */ + +bool +isc_sockaddr_eqaddr(const isc_sockaddr_t *a, const isc_sockaddr_t *b); +/*%< + * Return true iff the address parts of the socket addresses + * 'a' and 'b' are equal, ignoring the ports. + */ + +bool +isc_sockaddr_eqaddrprefix(const isc_sockaddr_t *a, const isc_sockaddr_t *b, + unsigned int prefixlen); +/*%< + * Return true iff the most significant 'prefixlen' bits of the + * socket addresses 'a' and 'b' are equal, ignoring the ports. + * If 'b''s scope is zero then 'a''s scope will be ignored. + */ + +unsigned int +isc_sockaddr_hash(const isc_sockaddr_t *sockaddr, bool address_only); +/*%< + * Return a hash value for the socket address 'sockaddr'. If 'address_only' + * is true, the hash value will not depend on the port. + * + * IPv6 addresses containing mapped IPv4 addresses generate the same hash + * value as the equivalent IPv4 address. + */ + +void +isc_sockaddr_any(isc_sockaddr_t *sockaddr); +/*%< + * Return the IPv4 wildcard address. + */ + +void +isc_sockaddr_any6(isc_sockaddr_t *sockaddr); +/*%< + * Return the IPv6 wildcard address. + */ + +void +isc_sockaddr_anyofpf(isc_sockaddr_t *sockaddr, int family); +/*%< + * Set '*sockaddr' to the wildcard address of protocol family + * 'family'. + * + * Requires: + * \li 'family' is AF_INET or AF_INET6. + */ + +void +isc_sockaddr_fromin(isc_sockaddr_t *sockaddr, const struct in_addr *ina, + in_port_t port); +/*%< + * Construct an isc_sockaddr_t from an IPv4 address and port. + */ + +void +isc_sockaddr_fromin6(isc_sockaddr_t *sockaddr, const struct in6_addr *ina6, + in_port_t port); +/*%< + * Construct an isc_sockaddr_t from an IPv6 address and port. + */ + +void +isc_sockaddr_v6fromin(isc_sockaddr_t *sockaddr, const struct in_addr *ina, + in_port_t port); +/*%< + * Construct an IPv6 isc_sockaddr_t representing a mapped IPv4 address. + */ + +void +isc_sockaddr_fromnetaddr(isc_sockaddr_t *sockaddr, const isc_netaddr_t *na, + in_port_t port); +/*%< + * Construct an isc_sockaddr_t from an isc_netaddr_t and port. + */ + +int +isc_sockaddr_pf(const isc_sockaddr_t *sockaddr); +/*%< + * Get the protocol family of 'sockaddr'. + * + * Requires: + * + *\li 'sockaddr' is a valid sockaddr with an address family of AF_INET + * or AF_INET6. + * + * Returns: + * + *\li The protocol family of 'sockaddr', e.g. PF_INET or PF_INET6. + */ + +void +isc_sockaddr_setport(isc_sockaddr_t *sockaddr, in_port_t port); +/*%< + * Set the port of 'sockaddr' to 'port'. + */ + +in_port_t +isc_sockaddr_getport(const isc_sockaddr_t *sockaddr); +/*%< + * Get the port stored in 'sockaddr'. + */ + +isc_result_t +isc_sockaddr_totext(const isc_sockaddr_t *sockaddr, isc_buffer_t *target); +/*%< + * Append a text representation of 'sockaddr' to the buffer 'target'. + * The text will include both the IP address (v4 or v6) and the port. + * The text is null terminated, but the terminating null is not + * part of the buffer's used region. + * + * Returns: + * \li ISC_R_SUCCESS + * \li ISC_R_NOSPACE The text or the null termination did not fit. + */ + +void +isc_sockaddr_format(const isc_sockaddr_t *sa, char *array, unsigned int size); +/*%< + * Format a human-readable representation of the socket address '*sa' + * into the character array 'array', which is of size 'size'. + * The resulting string is guaranteed to be null-terminated. + */ + +bool +isc_sockaddr_ismulticast(const isc_sockaddr_t *sa); +/*%< + * Returns #true if the address is a multicast address. + */ + +bool +isc_sockaddr_isexperimental(const isc_sockaddr_t *sa); +/* + * Returns true if the address is a experimental (CLASS E) address. + */ + +bool +isc_sockaddr_islinklocal(const isc_sockaddr_t *sa); +/*%< + * Returns true if the address is a link local address. + */ + +bool +isc_sockaddr_issitelocal(const isc_sockaddr_t *sa); +/*%< + * Returns true if the address is a sitelocal address. + */ + +bool +isc_sockaddr_isnetzero(const isc_sockaddr_t *sa); +/*%< + * Returns true if the address is in net zero. + */ + +isc_result_t +isc_sockaddr_frompath(isc_sockaddr_t *sockaddr, const char *path); +/* + * Create a UNIX domain sockaddr that refers to path. + * + * Returns: + * \li ISC_R_NOSPACE + * \li ISC_R_NOTIMPLEMENTED + * \li ISC_R_SUCCESS + */ + +isc_result_t +isc_sockaddr_fromsockaddr(isc_sockaddr_t *isa, const struct sockaddr *sa); + +#define ISC_SOCKADDR_FORMATSIZE \ + sizeof("xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:XXX.XXX.XXX.XXX%SSSSSSSSSS#" \ + "YYYYY") +/*%< + * Minimum size of array to pass to isc_sockaddr_format(). + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/stat.h b/lib/isc/include/isc/stat.h new file mode 100644 index 0000000..fad37c9 --- /dev/null +++ b/lib/isc/include/isc/stat.h @@ -0,0 +1,44 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/***** +***** Module Info +*****/ + +/* + * Portable <sys/stat.h> support. + * + * This module is responsible for defining S_IS??? macros. + * + * MP: + * No impact. + * + * Reliability: + * No anticipated impact. + * + * Resources: + * N/A. + * + * Security: + * No anticipated impact. + * + */ + +/*** + *** Imports. + ***/ + +#include <sys/stat.h> +#include <sys/types.h> diff --git a/lib/isc/include/isc/stats.h b/lib/isc/include/isc/stats.h new file mode 100644 index 0000000..5bed7d5 --- /dev/null +++ b/lib/isc/include/isc/stats.h @@ -0,0 +1,253 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/stats.h */ + +#include <inttypes.h> + +#include <isc/types.h> + +/*% + * Statistics counters. Used as isc_statscounter_t values. + */ +enum { + /*% + * Socket statistics counters. + */ + isc_sockstatscounter_udp4open = 0, + isc_sockstatscounter_udp6open = 1, + isc_sockstatscounter_tcp4open = 2, + isc_sockstatscounter_tcp6open = 3, + isc_sockstatscounter_unixopen = 4, + + isc_sockstatscounter_udp4openfail = 5, + isc_sockstatscounter_udp6openfail = 6, + isc_sockstatscounter_tcp4openfail = 7, + isc_sockstatscounter_tcp6openfail = 8, + isc_sockstatscounter_unixopenfail = 9, + + isc_sockstatscounter_udp4close = 10, + isc_sockstatscounter_udp6close = 11, + isc_sockstatscounter_tcp4close = 12, + isc_sockstatscounter_tcp6close = 13, + isc_sockstatscounter_unixclose = 14, + isc_sockstatscounter_fdwatchclose = 15, + + isc_sockstatscounter_udp4bindfail = 16, + isc_sockstatscounter_udp6bindfail = 17, + isc_sockstatscounter_tcp4bindfail = 18, + isc_sockstatscounter_tcp6bindfail = 19, + isc_sockstatscounter_unixbindfail = 20, + isc_sockstatscounter_fdwatchbindfail = 21, + + isc_sockstatscounter_udp4connect = 22, + isc_sockstatscounter_udp6connect = 23, + isc_sockstatscounter_tcp4connect = 24, + isc_sockstatscounter_tcp6connect = 25, + isc_sockstatscounter_unixconnect = 26, + isc_sockstatscounter_fdwatchconnect = 27, + + isc_sockstatscounter_udp4connectfail = 28, + isc_sockstatscounter_udp6connectfail = 29, + isc_sockstatscounter_tcp4connectfail = 30, + isc_sockstatscounter_tcp6connectfail = 31, + isc_sockstatscounter_unixconnectfail = 32, + isc_sockstatscounter_fdwatchconnectfail = 33, + + isc_sockstatscounter_tcp4accept = 34, + isc_sockstatscounter_tcp6accept = 35, + isc_sockstatscounter_unixaccept = 36, + + isc_sockstatscounter_tcp4acceptfail = 37, + isc_sockstatscounter_tcp6acceptfail = 38, + isc_sockstatscounter_unixacceptfail = 39, + + isc_sockstatscounter_udp4sendfail = 40, + isc_sockstatscounter_udp6sendfail = 41, + isc_sockstatscounter_tcp4sendfail = 42, + isc_sockstatscounter_tcp6sendfail = 43, + isc_sockstatscounter_unixsendfail = 44, + isc_sockstatscounter_fdwatchsendfail = 45, + + isc_sockstatscounter_udp4recvfail = 46, + isc_sockstatscounter_udp6recvfail = 47, + isc_sockstatscounter_tcp4recvfail = 48, + isc_sockstatscounter_tcp6recvfail = 49, + isc_sockstatscounter_unixrecvfail = 50, + isc_sockstatscounter_fdwatchrecvfail = 51, + + isc_sockstatscounter_udp4active = 52, + isc_sockstatscounter_udp6active = 53, + isc_sockstatscounter_tcp4active = 54, + isc_sockstatscounter_tcp6active = 55, + isc_sockstatscounter_unixactive = 56, + + isc_sockstatscounter_rawopen = 57, + isc_sockstatscounter_rawopenfail = 58, + isc_sockstatscounter_rawclose = 59, + isc_sockstatscounter_rawrecvfail = 60, + isc_sockstatscounter_rawactive = 61, + + isc_sockstatscounter_max = 62 +}; + +ISC_LANG_BEGINDECLS + +/*%< + * Flag(s) for isc_stats_dump(). + */ +#define ISC_STATSDUMP_VERBOSE 0x00000001 /*%< dump 0-value counters */ + +/*%< + * Dump callback type. + */ +typedef void (*isc_stats_dumper_t)(isc_statscounter_t, uint64_t, void *); + +isc_result_t +isc_stats_create(isc_mem_t *mctx, isc_stats_t **statsp, int ncounters); +/*%< + * Create a statistics counter structure of general type. It counts a general + * set of counters indexed by an ID between 0 and ncounters -1. + * + * Requires: + *\li 'mctx' must be a valid memory context. + * + *\li 'statsp' != NULL && '*statsp' == NULL. + * + * Returns: + *\li ISC_R_SUCCESS -- all ok + * + *\li anything else -- failure + */ + +void +isc_stats_attach(isc_stats_t *stats, isc_stats_t **statsp); +/*%< + * Attach to a statistics set. + * + * Requires: + *\li 'stats' is a valid isc_stats_t. + * + *\li 'statsp' != NULL && '*statsp' == NULL + */ + +void +isc_stats_detach(isc_stats_t **statsp); +/*%< + * Detaches from the statistics set. + * + * Requires: + *\li 'statsp' != NULL and '*statsp' is a valid isc_stats_t. + */ + +int +isc_stats_ncounters(isc_stats_t *stats); +/*%< + * Returns the number of counters contained in stats. + * + * Requires: + *\li 'stats' is a valid isc_stats_t. + * + */ + +void +isc_stats_increment(isc_stats_t *stats, isc_statscounter_t counter); +/*%< + * Increment the counter-th counter of stats. + * + * Requires: + *\li 'stats' is a valid isc_stats_t. + * + *\li counter is less than the maximum available ID for the stats specified + * on creation. + */ + +void +isc_stats_decrement(isc_stats_t *stats, isc_statscounter_t counter); +/*%< + * Decrement the counter-th counter of stats. + * + * Requires: + *\li 'stats' is a valid isc_stats_t. + */ + +void +isc_stats_dump(isc_stats_t *stats, isc_stats_dumper_t dump_fn, void *arg, + unsigned int options); +/*%< + * Dump the current statistics counters in a specified way. For each counter + * in stats, dump_fn is called with its current value and the given argument + * arg. By default counters that have a value of 0 is skipped; if options has + * the ISC_STATSDUMP_VERBOSE flag, even such counters are dumped. + * + * Requires: + *\li 'stats' is a valid isc_stats_t. + */ + +void +isc_stats_set(isc_stats_t *stats, uint64_t val, isc_statscounter_t counter); +/*%< + * Set the given counter to the specified value. + * + * Requires: + *\li 'stats' is a valid isc_stats_t. + */ + +void +isc_stats_set(isc_stats_t *stats, uint64_t val, isc_statscounter_t counter); +/*%< + * Set the given counter to the specified value. + * + * Requires: + *\li 'stats' is a valid isc_stats_t. + */ + +void +isc_stats_update_if_greater(isc_stats_t *stats, isc_statscounter_t counter, + isc_statscounter_t value); +/*%< + * Atomically assigns 'value' to 'counter' if value > counter. + * + * Requires: + *\li 'stats' is a valid isc_stats_t. + * + *\li counter is less than the maximum available ID for the stats specified + * on creation. + */ + +isc_statscounter_t +isc_stats_get_counter(isc_stats_t *stats, isc_statscounter_t counter); +/*%< + * Returns value currently stored in counter. + * + * Requires: + *\li 'stats' is a valid isc_stats_t. + * + *\li counter is less than the maximum available ID for the stats specified + * on creation. + */ + +void +isc_stats_resize(isc_stats_t **stats, int ncounters); +/*%< + * Resize a statistics counter structure of general type. The new set of + * counters are indexed by an ID between 0 and ncounters -1. + * + * Requires: + *\li 'stats' is a valid isc_stats_t. + *\li 'ncounters' is a non-zero positive number. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/stdatomic.h b/lib/isc/include/isc/stdatomic.h new file mode 100644 index 0000000..7c2e21c --- /dev/null +++ b/lib/isc/include/isc/stdatomic.h @@ -0,0 +1,125 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#include <inttypes.h> +#include <stdbool.h> +#include <stddef.h> +#if HAVE_UCHAR_H +#include <uchar.h> +#endif /* HAVE_UCHAR_H */ + +/* GCC 4.7.0 introduced __atomic builtins, but not the __GNUC_ATOMICS define */ +#if !defined(__GNUC_ATOMICS) && __GNUC__ == 4 && __GNUC_MINOR__ >= 7 +#define __GNUC_ATOMICS +#endif + +#if !defined(__GNUC_ATOMICS) +#error "isc/stdatomic.h does not support your compiler" +#endif /* if !defined(__GNUC_ATOMICS) */ + +typedef enum memory_order { + memory_order_relaxed = __ATOMIC_RELAXED, + memory_order_consume = __ATOMIC_CONSUME, + memory_order_acquire = __ATOMIC_ACQUIRE, + memory_order_release = __ATOMIC_RELEASE, + memory_order_acq_rel = __ATOMIC_ACQ_REL, + memory_order_seq_cst = __ATOMIC_SEQ_CST +} memory_order; + +#ifndef HAVE_UCHAR_H +typedef uint_least16_t char16_t; +typedef uint_least32_t char32_t; +#endif /* HAVE_UCHAR_H */ + +typedef bool atomic_bool; +typedef char atomic_char; +typedef signed char atomic_schar; +typedef unsigned char atomic_uchar; +typedef short atomic_short; +typedef unsigned short atomic_ushort; +typedef int atomic_int; +typedef unsigned int atomic_uint; +typedef long atomic_long; +typedef unsigned long atomic_ulong; +typedef long long atomic_llong; +typedef unsigned long long atomic_ullong; +typedef char16_t atomic_char16_t; +typedef char32_t atomic_char32_t; +typedef wchar_t atomic_wchar_t; +typedef int_least8_t atomic_int_least8_t; +typedef uint_least8_t atomic_uint_least8_t; +typedef int_least16_t atomic_int_least16_t; +typedef uint_least16_t atomic_uint_least16_t; +typedef int_least32_t atomic_int_least32_t; +typedef uint_least32_t atomic_uint_least32_t; +typedef int_least64_t atomic_int_least64_t; +typedef uint_least64_t atomic_uint_least64_t; +typedef int_fast8_t atomic_int_fast8_t; +typedef uint_fast8_t atomic_uint_fast8_t; +typedef int_fast16_t atomic_int_fast16_t; +typedef uint_fast16_t atomic_uint_fast16_t; +typedef int_fast32_t atomic_int_fast32_t; +typedef uint_fast32_t atomic_uint_fast32_t; +typedef int_fast64_t atomic_int_fast64_t; +typedef uint_fast64_t atomic_uint_fast64_t; +typedef intptr_t atomic_intptr_t; +typedef uintptr_t atomic_uintptr_t; +typedef size_t atomic_size_t; +typedef ptrdiff_t atomic_ptrdiff_t; +typedef intmax_t atomic_intmax_t; +typedef uintmax_t atomic_uintmax_t; + +#define atomic_init(obj, desired) (*obj = desired) +#define atomic_load_explicit(obj, order) __atomic_load_n(obj, order) +#define atomic_store_explicit(obj, desired, order) \ + __atomic_store_n(obj, desired, order) +#define atomic_fetch_add_explicit(obj, arg, order) \ + __atomic_fetch_add(obj, arg, order) +#define atomic_fetch_sub_explicit(obj, arg, order) \ + __atomic_fetch_sub(obj, arg, order) +#define atomic_fetch_and_explicit(obj, arg, order) \ + __atomic_fetch_and(obj, arg, order) +#define atomic_fetch_or_explicit(obj, arg, order) \ + __atomic_fetch_or(obj, arg, order) +#define atomic_compare_exchange_strong_explicit(obj, expected, desired, succ, \ + fail) \ + __atomic_compare_exchange_n(obj, expected, desired, 0, succ, fail) +#define atomic_compare_exchange_weak_explicit(obj, expected, desired, succ, \ + fail) \ + __atomic_compare_exchange_n(obj, expected, desired, 1, succ, fail) +#define atomic_exchange_explicit(obj, desired, order) \ + __atomic_exchange_n(obj, desired, order) + +#define atomic_load(obj) atomic_load_explicit(obj, memory_order_seq_cst) +#define atomic_store(obj, arg) \ + atomic_store_explicit(obj, arg, memory_order_seq_cst) +#define atomic_fetch_add(obj, arg) \ + atomic_fetch_add_explicit(obj, arg, memory_order_seq_cst) +#define atomic_fetch_sub(obj, arg) \ + atomic_fetch_sub_explicit(obj, arg, memory_order_seq_cst) +#define atomic_fetch_and(obj, arg) \ + atomic_fetch_and_explicit(obj, arg, memory_order_seq_cst) +#define atomic_fetch_or(obj, arg) \ + atomic_fetch_or_explicit(obj, arg, memory_order_seq_cst) +#define atomic_compare_exchange_strong(obj, expected, desired) \ + atomic_compare_exchange_strong_explicit(obj, expected, desired, \ + memory_order_seq_cst, \ + memory_order_seq_cst) +#define atomic_compare_exchange_weak(obj, expected, desired) \ + atomic_compare_exchange_weak_explicit(obj, expected, desired, \ + memory_order_seq_cst, \ + memory_order_seq_cst) +#define atomic_exchange(obj, desired) \ + atomic_exchange_explicit(obj, desired, memory_order_seq_cst) diff --git a/lib/isc/include/isc/stdio.h b/lib/isc/include/isc/stdio.h new file mode 100644 index 0000000..c8bac4d --- /dev/null +++ b/lib/isc/include/isc/stdio.h @@ -0,0 +1,71 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/stdio.h */ + +/*% + * These functions are wrappers around the corresponding stdio functions. + * + * They return a detailed error code in the form of an an isc_result_t. ANSI C + * does not guarantee that stdio functions set errno, hence these functions + * must use platform dependent methods (e.g., the POSIX errno) to construct the + * error code. + */ + +#include <stdio.h> + +#include <isc/lang.h> +#include <isc/result.h> + +ISC_LANG_BEGINDECLS + +/*% Open */ +isc_result_t +isc_stdio_open(const char *filename, const char *mode, FILE **fp); + +/*% Close */ +isc_result_t +isc_stdio_close(FILE *f); + +/*% Seek */ +isc_result_t +isc_stdio_seek(FILE *f, off_t offset, int whence); + +/*% Tell */ +isc_result_t +isc_stdio_tell(FILE *f, off_t *offsetp); + +/*% Read */ +isc_result_t +isc_stdio_read(void *ptr, size_t size, size_t nmemb, FILE *f, size_t *nret); + +/*% Write */ +isc_result_t +isc_stdio_write(const void *ptr, size_t size, size_t nmemb, FILE *f, + size_t *nret); + +/*% Flush */ +isc_result_t +isc_stdio_flush(FILE *f); + +isc_result_t +isc_stdio_sync(FILE *f); +/*%< + * Invoke fsync() on the file descriptor underlying an stdio stream, or an + * equivalent system-dependent operation. Note that this function has no + * direct counterpart in the stdio library. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/stdtime.h b/lib/isc/include/isc/stdtime.h new file mode 100644 index 0000000..45ec50f --- /dev/null +++ b/lib/isc/include/isc/stdtime.h @@ -0,0 +1,61 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file */ + +#include <inttypes.h> +#include <stdlib.h> + +#include <isc/lang.h> + +/*% + * It's public information that 'isc_stdtime_t' is an unsigned integral type. + * Applications that want maximum portability should not assume anything + * about its size. + */ +typedef uint32_t isc_stdtime_t; + +ISC_LANG_BEGINDECLS +/* */ +void +isc_stdtime_get(isc_stdtime_t *t); +/*%< + * Set 't' to the number of seconds since 00:00:00 UTC, January 1, 1970. + * + * Requires: + * + *\li 't' is a valid pointer. + */ + +void +isc_stdtime_tostring(isc_stdtime_t t, char *out, size_t outlen); +/* + * Convert 't' into a null-terminated string of the form + * "Wed Jun 30 21:49:08 1993". Store the string in the 'out' + * buffer. + * + * Requires: + * + * 't' is a valid time. + * 'out' is a valid pointer. + * 'outlen' is at least 26. + */ + +#define isc_stdtime_convert32(t, t32p) (*(t32p) = t) +/* + * Convert the standard time to its 32-bit version. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/strerr.h b/lib/isc/include/isc/strerr.h new file mode 100644 index 0000000..563ff48 --- /dev/null +++ b/lib/isc/include/isc/strerr.h @@ -0,0 +1,29 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/strerr.h */ + +#include <isc/string.h> + +/*** + *** Default strerror_r buffer size + ***/ + +#define ISC_STRERRORSIZE 128 + +#if defined(strerror_r) +#undef strerror_r +#endif /* if defined(strerror_r) */ +#define strerror_r isc_string_strerror_r diff --git a/lib/isc/include/isc/string.h b/lib/isc/include/isc/string.h new file mode 100644 index 0000000..fbf6129 --- /dev/null +++ b/lib/isc/include/isc/string.h @@ -0,0 +1,42 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/string.h */ + +#include <string.h> + +#include <isc/lang.h> + +ISC_LANG_BEGINDECLS + +#if !defined(HAVE_STRLCPY) +size_t +strlcpy(char *dst, const char *src, size_t size); +#endif /* !defined(HAVE_STRLCPY) */ + +#if !defined(HAVE_STRLCAT) +size_t +strlcat(char *dst, const char *src, size_t size); +#endif /* if !defined(HAVE_STRLCAT) */ + +#if !defined(HAVE_STRNSTR) +char * +strnstr(const char *s, const char *find, size_t slen); +#endif /* if !defined(HAVE_STRNSTR) */ + +int +isc_string_strerror_r(int errnum, char *buf, size_t buflen); + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/symtab.h b/lib/isc/include/isc/symtab.h new file mode 100644 index 0000000..2be3a8b --- /dev/null +++ b/lib/isc/include/isc/symtab.h @@ -0,0 +1,135 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/***** +***** Module Info +*****/ + +/*! \file isc/symtab.h + * \brief Provides a simple memory-based symbol table. + * + * Keys are C strings, and key comparisons are case-insensitive. A type may + * be specified when looking up, defining, or undefining. A type value of + * 0 means "match any type"; any other value will only match the given + * type. + * + * It's possible that a client will attempt to define a <key, type, value> + * tuple when a tuple with the given key and type already exists in the table. + * What to do in this case is specified by the client. Possible policies are: + * + *\li #isc_symexists_reject Disallow the define, returning #ISC_R_EXISTS + *\li #isc_symexists_replace Replace the old value with the new. The + * undefine action (if provided) will be called + * with the old <key, type, value> tuple. + *\li #isc_symexists_add Add the new tuple, leaving the old tuple in + * the table. Subsequent lookups will retrieve + * the most-recently-defined tuple. + * + * A lookup of a key using type 0 will return the most-recently defined + * symbol with that key. An undefine of a key using type 0 will undefine the + * most-recently defined symbol with that key. Trying to define a key with + * type 0 is illegal. + * + * The symbol table library does not make a copy the key field, so the + * caller must ensure that any key it passes to isc_symtab_define() will not + * change until it calls isc_symtab_undefine() or isc_symtab_destroy(). + * + * A user-specified action will be called (if provided) when a symbol is + * undefined. It can be used to free memory associated with keys and/or + * values. + * + * A symbol table is implemented as a hash table of lists; the size of the + * hash table is set by the 'size' parameter to isc_symtbl_create(). When + * the number of entries in the symbol table reaches three quarters of this + * value, the hash table is reallocated with size doubled, in order to + * optimize lookup performance. This has a negative effect on insertion + * performance, which can be mitigated by sizing the table appropriately + * when creating it. + * + * \li MP: + * The callers of this module must ensure any required synchronization. + * + * \li Reliability: + * No anticipated impact. + * + * \li Resources: + * TBS + * + * \li Security: + * No anticipated impact. + * + * \li Standards: + * None. + */ + +/*** + *** Imports. + ***/ + +#include <stdbool.h> + +#include <isc/lang.h> +#include <isc/types.h> + +/* + *** Symbol Tables. + ***/ +/*% Symbol table value. */ +typedef union isc_symvalue { + void *as_pointer; + const void *as_cpointer; + int as_integer; + unsigned int as_uinteger; +} isc_symvalue_t; + +typedef void (*isc_symtabaction_t)(char *key, unsigned int type, + isc_symvalue_t value, void *userarg); +/*% Symbol table exists. */ +typedef enum { + isc_symexists_reject = 0, /*%< Disallow the define */ + isc_symexists_replace = 1, /*%< Replace the old value with the new */ + isc_symexists_add = 2 /*%< Add the new tuple */ +} isc_symexists_t; + +ISC_LANG_BEGINDECLS + +/*% Create a symbol table. */ +isc_result_t +isc_symtab_create(isc_mem_t *mctx, unsigned int size, + isc_symtabaction_t undefine_action, void *undefine_arg, + bool case_sensitive, isc_symtab_t **symtabp); + +/*% Destroy a symbol table. */ +void +isc_symtab_destroy(isc_symtab_t **symtabp); + +/*% Lookup a symbol table. */ +isc_result_t +isc_symtab_lookup(isc_symtab_t *symtab, const char *key, unsigned int type, + isc_symvalue_t *value); + +/*% Define a symbol table. */ +isc_result_t +isc_symtab_define(isc_symtab_t *symtab, const char *key, unsigned int type, + isc_symvalue_t value, isc_symexists_t exists_policy); + +/*% Undefine a symbol table. */ +isc_result_t +isc_symtab_undefine(isc_symtab_t *symtab, const char *key, unsigned int type); + +/*% Return the number of items in a symbol table. */ +unsigned int +isc_symtab_count(isc_symtab_t *symtab); +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/syslog.h b/lib/isc/include/isc/syslog.h new file mode 100644 index 0000000..021f7fa --- /dev/null +++ b/lib/isc/include/isc/syslog.h @@ -0,0 +1,38 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file */ + +#include <isc/lang.h> +#include <isc/types.h> + +ISC_LANG_BEGINDECLS + +isc_result_t +isc_syslog_facilityfromstring(const char *str, int *facilityp); +/*%< + * Convert 'str' to the appropriate syslog facility constant. + * + * Requires: + * + *\li 'str' is not NULL + *\li 'facilityp' is not NULL + * + * Returns: + * \li #ISC_R_SUCCESS + * \li #ISC_R_NOTFOUND + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/task.h b/lib/isc/include/isc/task.h new file mode 100644 index 0000000..75b7cdb --- /dev/null +++ b/lib/isc/include/isc/task.h @@ -0,0 +1,646 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/***** + ***** Module Info + *****/ + +/*! \file isc/task.h + * \brief The task system provides a lightweight execution context, which is + * basically an event queue. + * + * When a task's event queue is non-empty, the + * task is runnable. A small work crew of threads, typically one per CPU, + * execute runnable tasks by dispatching the events on the tasks' event + * queues. Context switching between tasks is fast. + * + * \li MP: + * The module ensures appropriate synchronization of data structures it + * creates and manipulates. + * The caller must ensure that isc_taskmgr_destroy() is called only + * once for a given manager. + * + * \li Reliability: + * No anticipated impact. + * + * \li Resources: + * TBS + * + * \li Security: + * No anticipated impact. + * + * \li Standards: + * None. + * + * \section purge Purging and Unsending + * + * Events which have been queued for a task but not delivered may be removed + * from the task's event queue by purging or unsending. + * + * With both types, the caller specifies a matching pattern that selects + * events based upon their sender, type, and tag. + * + * Purging calls isc_event_free() on the matching events. + * + */ + +/*** + *** Imports. + ***/ + +#include <stdbool.h> + +#include <isc/eventclass.h> +#include <isc/lang.h> +#include <isc/netmgr.h> +#include <isc/stdtime.h> +#include <isc/types.h> + +#define ISC_TASKEVENT_FIRSTEVENT (ISC_EVENTCLASS_TASK + 0) +#define ISC_TASKEVENT_SHUTDOWN (ISC_EVENTCLASS_TASK + 1) +#define ISC_TASKEVENT_TEST (ISC_EVENTCLASS_TASK + 1) +#define ISC_TASKEVENT_LASTEVENT (ISC_EVENTCLASS_TASK + 65535) + +/***** + ***** Tasks. + *****/ + +ISC_LANG_BEGINDECLS + +/*** + *** Types + ***/ + +typedef enum { + isc_taskmgrmode_normal = 0, + isc_taskmgrmode_privileged +} isc_taskmgrmode_t; + +isc_result_t +isc_task_create(isc_taskmgr_t *manager, unsigned int quantum, + isc_task_t **taskp); +isc_result_t +isc_task_create_bound(isc_taskmgr_t *manager, unsigned int quantum, + isc_task_t **taskp, int threadid); +/*%< + * Create a task, optionally bound to a particular threadid. + * + * Notes: + * + *\li If 'quantum' is non-zero, then only that many events can be dispatched + * before the task must yield to other tasks waiting to execute. If + * quantum is zero, then the default quantum of the task manager will + * be used. + * + *\li The 'quantum' option may be removed from isc_task_create() in the + * future. If this happens, isc_task_getquantum() and + * isc_task_setquantum() will be provided. + * + * Requires: + * + *\li 'manager' is a valid task manager. + * + *\li taskp != NULL && *taskp == NULL + * + * Ensures: + * + *\li On success, '*taskp' is bound to the new task. + * + * Returns: + * + *\li #ISC_R_SUCCESS + *\li #ISC_R_NOMEMORY + *\li #ISC_R_UNEXPECTED + *\li #ISC_R_SHUTTINGDOWN + */ + +void +isc_task_ready(isc_task_t *task); +/*%< + * Enqueue the task onto netmgr queue. + */ + +isc_result_t +isc_task_run(isc_task_t *task); +/*%< + * Run all the queued events for the 'task', returning + * when the queue is empty or the number of events executed + * exceeds the 'quantum' specified when the task was created. + * + * Requires: + * + *\li 'task' is a valid task. + * + * Returns: + * + *\li #ISC_R_SUCCESS + *\li #ISC_R_QUOTA + */ + +void +isc_task_attach(isc_task_t *source, isc_task_t **targetp); +/*%< + * Attach *targetp to source. + * + * Requires: + * + *\li 'source' is a valid task. + * + *\li 'targetp' points to a NULL isc_task_t *. + * + * Ensures: + * + *\li *targetp is attached to source. + */ + +void +isc_task_detach(isc_task_t **taskp); +/*%< + * Detach *taskp from its task. + * + * Requires: + * + *\li '*taskp' is a valid task. + * + * Ensures: + * + *\li *taskp is NULL. + * + *\li If '*taskp' is the last reference to the task, the task is idle (has + * an empty event queue), and has not been shutdown, the task will be + * shutdown. + * + *\li If '*taskp' is the last reference to the task and + * the task has been shutdown, + * all resources used by the task will be freed. + */ + +void +isc_task_send(isc_task_t *task, isc_event_t **eventp); + +void +isc_task_sendto(isc_task_t *task, isc_event_t **eventp, int c); +/*%< + * Send '*event' to 'task', if task is idle try starting it on cpu 'c' + * If 'c' is smaller than 0 then cpu is selected randomly. + * + * Requires: + * + *\li 'task' is a valid task. + *\li eventp != NULL && *eventp != NULL. + * + * Ensures: + * + *\li *eventp == NULL. + */ + +void +isc_task_sendtoanddetach(isc_task_t **taskp, isc_event_t **eventp, int c); + +void +isc_task_sendanddetach(isc_task_t **taskp, isc_event_t **eventp); +/*%< + * Send '*event' to '*taskp' and then detach '*taskp' from its + * task. If task is idle try starting it on cpu 'c' + * If 'c' is smaller than 0 then cpu is selected randomly. + * + * Requires: + * + *\li '*taskp' is a valid task. + *\li eventp != NULL && *eventp != NULL. + * + * Ensures: + * + *\li *eventp == NULL. + * + *\li *taskp == NULL. + * + *\li If '*taskp' is the last reference to the task, the task is + * idle (has an empty event queue), and has not been shutdown, + * the task will be shutdown. + * + *\li If '*taskp' is the last reference to the task and + * the task has been shutdown, + * all resources used by the task will be freed. + */ + +unsigned int +isc_task_purgerange(isc_task_t *task, void *sender, isc_eventtype_t first, + isc_eventtype_t last, void *tag); +/*%< + * Purge events from a task's event queue. + * + * Requires: + * + *\li 'task' is a valid task. + * + *\li last >= first + * + * Ensures: + * + *\li Events in the event queue of 'task' whose sender is 'sender', whose + * type is >= first and <= last, and whose tag is 'tag' will be purged, + * unless they are marked as unpurgable. + * + *\li A sender of NULL will match any sender. A NULL tag matches any + * tag. + * + * Returns: + * + *\li The number of events purged. + */ + +unsigned int +isc_task_purge(isc_task_t *task, void *sender, isc_eventtype_t type, void *tag); +/*%< + * Purge events from a task's event queue. + * + * Notes: + * + *\li This function is equivalent to + * + *\code + * isc_task_purgerange(task, sender, type, type, tag); + *\endcode + * + * Requires: + * + *\li 'task' is a valid task. + * + * Ensures: + * + *\li Events in the event queue of 'task' whose sender is 'sender', whose + * type is 'type', and whose tag is 'tag' will be purged, unless they + * are marked as unpurgable. + * + *\li A sender of NULL will match any sender. A NULL tag matches any + * tag. + * + * Returns: + * + *\li The number of events purged. + */ + +bool +isc_task_purgeevent(isc_task_t *task, isc_event_t *event); +/*%< + * Purge 'event' from a task's event queue. + * + * XXXRTH: WARNING: This method may be removed before beta. + * + * Notes: + * + *\li If 'event' is on the task's event queue, it will be purged, + * unless it is marked as unpurgeable. 'event' does not have to be + * on the task's event queue; in fact, it can even be an invalid + * pointer. Purging only occurs if the event is actually on the task's + * event queue. + * + * \li Purging never changes the state of the task. + * + * Requires: + * + *\li 'task' is a valid task. + * + * Ensures: + * + *\li 'event' is not in the event queue for 'task'. + * + * Returns: + * + *\li #true The event was purged. + *\li #false The event was not in the event queue, + * or was marked unpurgeable. + */ + +unsigned int +isc_task_unsend(isc_task_t *task, void *sender, isc_eventtype_t type, void *tag, + isc_eventlist_t *events); +/*%< + * Remove events from a task's event queue. + * + * Notes: + * + *\li This function is equivalent to + * + *\code + * isc_task_unsendrange(task, sender, type, type, tag, events); + *\endcode + * + * Requires: + * + *\li 'task' is a valid task. + * + *\li *events is a valid list. + * + * Ensures: + * + *\li Events in the event queue of 'task' whose sender is 'sender', whose + * type is 'type', and whose tag is 'tag' will be dequeued and appended + * to *events. + * + * Returns: + * + *\li The number of events unsent. + */ + +isc_result_t +isc_task_onshutdown(isc_task_t *task, isc_taskaction_t action, void *arg); +/*%< + * Send a shutdown event with action 'action' and argument 'arg' when + * 'task' is shutdown. + * + * Notes: + * + *\li Shutdown events are posted in LIFO order. + * + * Requires: + * + *\li 'task' is a valid task. + * + *\li 'action' is a valid task action. + * + * Ensures: + * + *\li When the task is shutdown, shutdown events requested with + * isc_task_onshutdown() will be appended to the task's event queue. + * + * + * Returns: + * + *\li #ISC_R_SUCCESS + *\li #ISC_R_NOMEMORY + *\li #ISC_R_SHUTTINGDOWN Task is shutting down. + */ + +void +isc_task_shutdown(isc_task_t *task); +/*%< + * Shutdown 'task'. + * + * Notes: + * + *\li Shutting down a task causes any shutdown events requested with + * isc_task_onshutdown() to be posted (in LIFO order). The task + * moves into a "shutting down" mode which prevents further calls + * to isc_task_onshutdown(). + * + *\li Trying to shutdown a task that has already been shutdown has no + * effect. + * + * Requires: + * + *\li 'task' is a valid task. + * + * Ensures: + * + *\li Any shutdown events requested with isc_task_onshutdown() have been + * posted (in LIFO order). + */ + +void +isc_task_destroy(isc_task_t **taskp); +/*%< + * Destroy '*taskp'. + * + * Notes: + * + *\li This call is equivalent to: + * + *\code + * isc_task_shutdown(*taskp); + * isc_task_detach(taskp); + *\endcode + * + * Requires: + * + * '*taskp' is a valid task. + * + * Ensures: + * + *\li Any shutdown events requested with isc_task_onshutdown() have been + * posted (in LIFO order). + * + *\li *taskp == NULL + * + *\li If '*taskp' is the last reference to the task, + * all resources used by the task will be freed. + */ + +void +isc_task_setname(isc_task_t *task, const char *name, void *tag); +/*%< + * Name 'task'. + * + * Notes: + * + *\li Only the first 15 characters of 'name' will be copied. + * + *\li Naming a task is currently only useful for debugging purposes. + * + * Requires: + * + *\li 'task' is a valid task. + */ + +const char * +isc_task_getname(isc_task_t *task); +/*%< + * Get the name of 'task', as previously set using isc_task_setname(). + * + * Notes: + *\li This function is for debugging purposes only. + * + * Requires: + *\li 'task' is a valid task. + * + * Returns: + *\li A non-NULL pointer to a null-terminated string. + * If the task has not been named, the string is + * empty. + * + */ + +isc_nm_t * +isc_task_getnetmgr(isc_task_t *task); + +void * +isc_task_gettag(isc_task_t *task); +/*%< + * Get the tag value for 'task', as previously set using isc_task_settag(). + * + * Notes: + *\li This function is for debugging purposes only. + * + * Requires: + *\li 'task' is a valid task. + */ + +void +isc_task_setquantum(isc_task_t *task, unsigned int quantum); +/*%< + * Set future 'task' quantum to 'quantum'. The current 'task' quantum will be + * kept for the current isc_task_run() loop, and will be changed for the next + * run. Therefore, the function is save to use from the event callback as it + * will not affect the current event loop processing. + */ + +isc_result_t +isc_task_beginexclusive(isc_task_t *task); +/*%< + * Request exclusive access for 'task', which must be the calling + * task. Waits for any other concurrently executing tasks to finish their + * current event, and prevents any new events from executing in any of the + * tasks sharing a task manager with 'task'. + * It also pauses processing of network events in netmgr if it was provided + * when taskmgr was created. + * + * The exclusive access must be relinquished by calling + * isc_task_endexclusive() before returning from the current event handler. + * + * Requires: + *\li 'task' is the calling task. + * + * Returns: + *\li #ISC_R_SUCCESS The current task now has exclusive access. + *\li #ISC_R_LOCKBUSY Another task has already requested exclusive + * access. + */ + +void +isc_task_endexclusive(isc_task_t *task); +/*%< + * Relinquish the exclusive access obtained by isc_task_beginexclusive(), + * allowing other tasks to execute. + * + * Requires: + *\li 'task' is the calling task, and has obtained + * exclusive access by calling isc_task_spl(). + */ + +bool +isc_task_exiting(isc_task_t *t); +/*%< + * Returns true if the task is in the process of shutting down, + * false otherwise. + * + * Requires: + *\li 'task' is a valid task. + */ + +void +isc_task_setprivilege(isc_task_t *task, bool priv); +/*%< + * Set or unset the task's "privileged" flag depending on the value of + * 'priv'. + * + * Under normal circumstances this flag has no effect on the task behavior, + * but when the task manager has been set to privileged execution mode via + * isc_taskmgr_setmode(), only tasks with the flag set will be executed, + * and all other tasks will wait until they're done. Once all privileged + * tasks have finished executing, the task manager resumes running + * non-privileged tasks. + * + * Requires: + *\li 'task' is a valid task. + */ + +bool +isc_task_getprivilege(isc_task_t *task); +/*%< + * Returns the current value of the task's privilege flag. + * + * Requires: + *\li 'task' is a valid task. + */ + +bool +isc_task_privileged(isc_task_t *task); +/*%< + * Returns true if the task's privilege flag is set *and* the task + * manager is currently in privileged mode. + * + * Requires: + *\li 'task' is a valid task. + */ + +/***** + ***** Task Manager. + *****/ + +void +isc_taskmgr_attach(isc_taskmgr_t *, isc_taskmgr_t **); +void +isc_taskmgr_detach(isc_taskmgr_t **); +/*%< + * Attach/detach the task manager. + */ + +void +isc_taskmgr_setmode(isc_taskmgr_t *manager, isc_taskmgrmode_t mode); +isc_taskmgrmode_t +isc_taskmgr_mode(isc_taskmgr_t *manager); +/*%< + * Set/get the operating mode of the task manager. Valid modes are: + * + *\li isc_taskmgrmode_normal + *\li isc_taskmgrmode_privileged + * + * In privileged execution mode, only tasks that have had the "privilege" + * flag set via isc_task_setprivilege() can be executed. When all such + * tasks are complete, non-privileged tasks resume running. The task calling + * this function should be in task-exclusive mode; the privileged tasks + * will be run after isc_task_endexclusive() is called. + * + * Requires: + * + *\li 'manager' is a valid task manager. + */ + +void +isc_taskmgr_setexcltask(isc_taskmgr_t *mgr, isc_task_t *task); +/*%< + * Set a task which will be used for all task-exclusive operations. + * + * Requires: + *\li 'manager' is a valid task manager. + * + *\li 'task' is a valid task. + */ + +isc_result_t +isc_taskmgr_excltask(isc_taskmgr_t *mgr, isc_task_t **taskp); +/*%< + * Attach '*taskp' to the task set by isc_taskmgr_getexcltask(). + * This task should be used whenever running in task-exclusive mode, + * so as to prevent deadlock between two exclusive tasks. + * + * Requires: + *\li 'manager' is a valid task manager. + * + *\li taskp != NULL && *taskp == NULL + */ + +#ifdef HAVE_LIBXML2 +int +isc_taskmgr_renderxml(isc_taskmgr_t *mgr, void *writer0); +#endif /* ifdef HAVE_LIBXML2 */ + +#ifdef HAVE_JSON_C +isc_result_t +isc_taskmgr_renderjson(isc_taskmgr_t *mgr, void *tasksobj0); +#endif /* HAVE_JSON_C */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/taskpool.h b/lib/isc/include/isc/taskpool.h new file mode 100644 index 0000000..cde2287 --- /dev/null +++ b/lib/isc/include/isc/taskpool.h @@ -0,0 +1,135 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/***** +***** Module Info +*****/ + +/*! \file isc/taskpool.h + * \brief A task pool is a mechanism for sharing a small number of tasks + * among a large number of objects such that each object is + * assigned a unique task, but each task may be shared by several + * objects. + * + * Task pools are used to let objects that can exist in large + * numbers (e.g., zones) use tasks for synchronization without + * the memory overhead and unfair scheduling competition that + * could result from creating a separate task for each object. + */ + +/*** + *** Imports. + ***/ + +#include <stdbool.h> + +#include <isc/lang.h> +#include <isc/task.h> + +ISC_LANG_BEGINDECLS + +/***** +***** Types. +*****/ + +typedef struct isc_taskpool isc_taskpool_t; + +/***** +***** Functions. +*****/ + +isc_result_t +isc_taskpool_create(isc_taskmgr_t *tmgr, isc_mem_t *mctx, unsigned int ntasks, + unsigned int quantum, bool priv, isc_taskpool_t **poolp); +/*%< + * Create a task pool of "ntasks" tasks, each with quantum + * "quantum". + * + * Requires: + * + *\li 'tmgr' is a valid task manager. + * + *\li 'mctx' is a valid memory context. + * + *\li poolp != NULL && *poolp == NULL + * + * Ensures: + * + *\li On success, '*taskp' points to the new task pool. + * + * Returns: + * + *\li #ISC_R_SUCCESS + *\li #ISC_R_NOMEMORY + *\li #ISC_R_UNEXPECTED + */ + +void +isc_taskpool_gettask(isc_taskpool_t *pool, isc_task_t **targetp); +/*%< + * Attach to a task from the pool. Currently the next task is chosen + * from the pool at random. (This may be changed in the future to + * something that guaratees balance.) + */ + +int +isc_taskpool_size(isc_taskpool_t *pool); +/*%< + * Returns the number of tasks in the task pool 'pool'. + */ + +isc_result_t +isc_taskpool_expand(isc_taskpool_t **sourcep, unsigned int size, bool priv, + isc_taskpool_t **targetp); + +/*%< + * If 'size' is larger than the number of tasks in the pool pointed to by + * 'sourcep', then a new taskpool of size 'size' is allocated, the existing + * tasks from are moved into it, additional tasks are created to bring the + * total number up to 'size', and the resulting pool is attached to + * 'targetp'. + * + * If 'size' is less than or equal to the tasks in pool 'source', then + * 'sourcep' is attached to 'targetp' without any other action being taken. + * + * In either case, 'sourcep' is detached. + * + * Requires: + * + * \li 'sourcep' is not NULL and '*source' is not NULL + * \li 'targetp' is not NULL and '*source' is NULL + * + * Ensures: + * + * \li On success, '*targetp' points to a valid task pool. + * \li On success, '*sourcep' points to NULL. + * + * Returns: + * + * \li #ISC_R_SUCCESS + * \li #ISC_R_NOMEMORY + */ + +void +isc_taskpool_destroy(isc_taskpool_t **poolp); +/*%< + * Destroy a task pool. The tasks in the pool are detached but not + * shut down. + * + * Requires: + * \li '*poolp' is a valid task pool. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/thread.h b/lib/isc/include/isc/thread.h new file mode 100644 index 0000000..a70e2c7 --- /dev/null +++ b/lib/isc/include/isc/thread.h @@ -0,0 +1,53 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file */ + +#include <pthread.h> +#if HAVE_THREADS_H +#include <threads.h> +#endif + +#if defined(HAVE_PTHREAD_NP_H) +#include <pthread_np.h> +#endif /* if defined(HAVE_PTHREAD_NP_H) */ + +#include <isc/lang.h> +#include <isc/result.h> + +extern thread_local size_t isc_tid_v; + +ISC_LANG_BEGINDECLS + +typedef pthread_t isc_thread_t; +typedef void *isc_threadresult_t; +typedef void *isc_threadarg_t; +typedef isc_threadresult_t (*isc_threadfunc_t)(isc_threadarg_t); + +void +isc_thread_create(isc_threadfunc_t, isc_threadarg_t, isc_thread_t *); + +void +isc_thread_join(isc_thread_t thread, isc_threadresult_t *result); + +void +isc_thread_yield(void); + +void +isc_thread_setname(isc_thread_t thread, const char *name); + +#define isc_thread_self (uintptr_t) pthread_self + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/time.h b/lib/isc/include/isc/time.h new file mode 100644 index 0000000..9c9da37 --- /dev/null +++ b/lib/isc/include/isc/time.h @@ -0,0 +1,468 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file */ + +#include <inttypes.h> +#include <stdbool.h> + +#include <isc/lang.h> +#include <isc/types.h> + +enum { + MS_PER_SEC = 1000, /*%< Milliseonds per second. */ + US_PER_MS = 1000, /*%< Microseconds per millisecond. */ + US_PER_SEC = 1000 * 1000, /*%< Microseconds per second. */ + NS_PER_US = 1000, /*%< Nanoseconds per millisecond. */ + NS_PER_MS = 1000 * 1000, /*%< Nanoseconds per microsecond. */ + NS_PER_SEC = 1000 * 1000 * 1000, /*%< Nanoseconds per second. */ +}; + +/*** + *** Intervals + ***/ + +/*! + * \brief + * The contents of this structure are private, and MUST NOT be accessed + * directly by callers. + * + * The contents are exposed only to allow callers to avoid dynamic allocation. + */ +struct isc_interval { + unsigned int seconds; + unsigned int nanoseconds; +}; + +extern const isc_interval_t *const isc_interval_zero; + +/* + * ISC_FORMATHTTPTIMESTAMP_SIZE needs to be 30 in C locale and potentially + * more for other locales to handle longer national abbreviations when + * expanding strftime's %a and %b. + */ +#define ISC_FORMATHTTPTIMESTAMP_SIZE 50 + +ISC_LANG_BEGINDECLS + +void +isc_interval_set(isc_interval_t *i, unsigned int seconds, + unsigned int nanoseconds); +/*%< + * Set 'i' to a value representing an interval of 'seconds' seconds and + * 'nanoseconds' nanoseconds, suitable for use in isc_time_add() and + * isc_time_subtract(). + * + * Requires: + * + *\li 't' is a valid pointer. + *\li nanoseconds < 1000000000. + */ + +bool +isc_interval_iszero(const isc_interval_t *i); +/*%< + * Returns true iff. 'i' is the zero interval. + * + * Requires: + * + *\li 'i' is a valid pointer. + */ + +unsigned int +isc_interval_ms(const isc_interval_t *i); +/*%< + * Returns interval 'i' expressed as a number of milliseconds. + * + * Requires: + * + *\li 'i' is a valid pointer. + */ + +/*** + *** Absolute Times + ***/ + +/*% + * The contents of this structure are private, and MUST NOT be accessed + * directly by callers. + * + * The contents are exposed only to allow callers to avoid dynamic allocation. + */ + +struct isc_time { + unsigned int seconds; + unsigned int nanoseconds; +}; + +extern const isc_time_t *const isc_time_epoch; + +void +isc_time_set(isc_time_t *t, unsigned int seconds, unsigned int nanoseconds); +/*%< + * Set 't' to a value which represents the given number of seconds and + * nanoseconds since 00:00:00 January 1, 1970, UTC. + * + * Notes: + *\li The Unix version of this call is equivalent to: + *\code + * isc_time_settoepoch(t); + * isc_interval_set(i, seconds, nanoseconds); + * isc_time_add(t, i, t); + *\endcode + * + * Requires: + *\li 't' is a valid pointer. + *\li nanoseconds < 1000000000. + */ + +void +isc_time_settoepoch(isc_time_t *t); +/*%< + * Set 't' to the time of the epoch. + * + * Notes: + *\li The date of the epoch is platform-dependent. + * + * Requires: + * + *\li 't' is a valid pointer. + */ + +bool +isc_time_isepoch(const isc_time_t *t); +/*%< + * Returns true iff. 't' is the epoch ("time zero"). + * + * Requires: + * + *\li 't' is a valid pointer. + */ + +isc_result_t +isc_time_now(isc_time_t *t); +/*%< + * Set 't' to the current absolute time. + * + * Requires: + * + *\li 't' is a valid pointer. + * + * Returns: + * + *\li Success + *\li Unexpected error + * Getting the time from the system failed. + *\li Out of range + * The time from the system is too large to be represented + * in the current definition of isc_time_t. + */ + +isc_result_t +isc_time_now_hires(isc_time_t *t); +/*%< + * Set 't' to the current absolute time. Uses higher resolution clocks + * recommended when microsecond accuracy is required. + * + * Requires: + * + *\li 't' is a valid pointer. + * + * Returns: + * + *\li Success + *\li Unexpected error + * Getting the time from the system failed. + *\li Out of range + * The time from the system is too large to be represented + * in the current definition of isc_time_t. + */ + +isc_result_t +isc_time_nowplusinterval(isc_time_t *t, const isc_interval_t *i); +/*%< + * Set *t to the current absolute time + i. + * + * Note: + *\li This call is equivalent to: + * + *\code + * isc_time_now(t); + * isc_time_add(t, i, t); + *\endcode + * + * Requires: + * + *\li 't' and 'i' are valid pointers. + * + * Returns: + * + *\li Success + *\li Unexpected error + * Getting the time from the system failed. + *\li Out of range + * The interval added to the time from the system is too large to + * be represented in the current definition of isc_time_t. + */ + +int +isc_time_compare(const isc_time_t *t1, const isc_time_t *t2); +/*%< + * Compare the times referenced by 't1' and 't2' + * + * Requires: + * + *\li 't1' and 't2' are valid pointers. + * + * Returns: + * + *\li -1 t1 < t2 (comparing times, not pointers) + *\li 0 t1 = t2 + *\li 1 t1 > t2 + */ + +isc_result_t +isc_time_add(const isc_time_t *t, const isc_interval_t *i, isc_time_t *result); +/*%< + * Add 'i' to 't', storing the result in 'result'. + * + * Requires: + * + *\li 't', 'i', and 'result' are valid pointers. + * + * Returns: + *\li Success + *\li Out of range + * The interval added to the time is too large to + * be represented in the current definition of isc_time_t. + */ + +isc_result_t +isc_time_subtract(const isc_time_t *t, const isc_interval_t *i, + isc_time_t *result); +/*%< + * Subtract 'i' from 't', storing the result in 'result'. + * + * Requires: + * + *\li 't', 'i', and 'result' are valid pointers. + * + * Returns: + *\li Success + *\li Out of range + * The interval is larger than the time since the epoch. + */ + +uint64_t +isc_time_microdiff(const isc_time_t *t1, const isc_time_t *t2); +/*%< + * Find the difference in microseconds between time t1 and time t2. + * t2 is the subtrahend of t1; ie, difference = t1 - t2. + * + * Requires: + * + *\li 't1' and 't2' are valid pointers. + * + * Returns: + *\li The difference of t1 - t2, or 0 if t1 <= t2. + */ + +uint32_t +isc_time_seconds(const isc_time_t *t); +/*%< + * Return the number of seconds since the epoch stored in a time structure. + * + * Requires: + * + *\li 't' is a valid pointer. + */ + +isc_result_t +isc_time_secondsastimet(const isc_time_t *t, time_t *secondsp); +/*%< + * Ensure the number of seconds in an isc_time_t is representable by a time_t. + * + * Notes: + *\li The number of seconds stored in an isc_time_t might be larger + * than the number of seconds a time_t is able to handle. Since + * time_t is mostly opaque according to the ANSI/ISO standard + * (essentially, all you can be sure of is that it is an arithmetic type, + * not even necessarily integral), it can be tricky to ensure that + * the isc_time_t is in the range a time_t can handle. Use this + * function in place of isc_time_seconds() any time you need to set a + * time_t from an isc_time_t. + * + * Requires: + *\li 't' is a valid pointer. + * + * Returns: + *\li Success + *\li Out of range + */ + +uint32_t +isc_time_nanoseconds(const isc_time_t *t); +/*%< + * Return the number of nanoseconds stored in a time structure. + * + * Notes: + *\li This is the number of nanoseconds in excess of the number + * of seconds since the epoch; it will always be less than one + * full second. + * + * Requires: + *\li 't' is a valid pointer. + * + * Ensures: + *\li The returned value is less than 1*10^9. + */ + +void +isc_time_formattimestamp(const isc_time_t *t, char *buf, unsigned int len); +/*%< + * Format the time 't' into the buffer 'buf' of length 'len', + * using a format like "30-Aug-2000 04:06:47.997" and the local time zone. + * If the text does not fit in the buffer, the result is indeterminate, + * but is always guaranteed to be null terminated. + * + * Requires: + *\li 'len' > 0 + *\li 'buf' points to an array of at least len chars + * + */ + +void +isc_time_formathttptimestamp(const isc_time_t *t, char *buf, unsigned int len); +/*%< + * Format the time 't' into the buffer 'buf' of length 'len', + * using a format like "Mon, 30 Aug 2000 04:06:47 GMT" + * If the text does not fit in the buffer, the result is indeterminate, + * but is always guaranteed to be null terminated. + * + * Requires: + *\li 'len' > 0 + *\li 'buf' points to an array of at least len chars + * + */ + +isc_result_t +isc_time_parsehttptimestamp(char *input, isc_time_t *t); +/*%< + * Parse the time in 'input' into the isc_time_t pointed to by 't', + * expecting a format like "Mon, 30 Aug 2000 04:06:47 GMT" + * + * Requires: + *\li 'buf' and 't' are not NULL. + */ + +void +isc_time_formatISO8601L(const isc_time_t *t, char *buf, unsigned int len); +/*%< + * Format the time 't' into the buffer 'buf' of length 'len', + * using the ISO8601 format: "yyyy-mm-ddThh:mm:ss" + * If the text does not fit in the buffer, the result is indeterminate, + * but is always guaranteed to be null terminated. + * + * Requires: + *\li 'len' > 0 + *\li 'buf' points to an array of at least len chars + * + */ + +void +isc_time_formatISO8601Lms(const isc_time_t *t, char *buf, unsigned int len); +/*%< + * Format the time 't' into the buffer 'buf' of length 'len', + * using the ISO8601 format: "yyyy-mm-ddThh:mm:ss.sss" + * If the text does not fit in the buffer, the result is indeterminate, + * but is always guaranteed to be null terminated. + * + * Requires: + *\li 'len' > 0 + *\li 'buf' points to an array of at least len chars + * + */ + +void +isc_time_formatISO8601Lus(const isc_time_t *t, char *buf, unsigned int len); +/*%< + * Format the time 't' into the buffer 'buf' of length 'len', + * using the ISO8601 format: "yyyy-mm-ddThh:mm:ss.ssssss" + * If the text does not fit in the buffer, the result is indeterminate, + * but is always guaranteed to be null terminated. + * + * Requires: + *\li 'len' > 0 + *\li 'buf' points to an array of at least len chars + * + */ + +void +isc_time_formatISO8601(const isc_time_t *t, char *buf, unsigned int len); +/*%< + * Format the time 't' into the buffer 'buf' of length 'len', + * using the ISO8601 format: "yyyy-mm-ddThh:mm:ssZ" + * If the text does not fit in the buffer, the result is indeterminate, + * but is always guaranteed to be null terminated. + * + * Requires: + *\li 'len' > 0 + *\li 'buf' points to an array of at least len chars + * + */ + +void +isc_time_formatISO8601ms(const isc_time_t *t, char *buf, unsigned int len); +/*%< + * Format the time 't' into the buffer 'buf' of length 'len', + * using the ISO8601 format: "yyyy-mm-ddThh:mm:ss.sssZ" + * If the text does not fit in the buffer, the result is indeterminate, + * but is always guaranteed to be null terminated. + * + * Requires: + *\li 'len' > 0 + *\li 'buf' points to an array of at least len chars + * + */ + +void +isc_time_formatISO8601us(const isc_time_t *t, char *buf, unsigned int len); +/*%< + * Format the time 't' into the buffer 'buf' of length 'len', + * using the ISO8601 format: "yyyy-mm-ddThh:mm:ss.ssssssZ" + * If the text does not fit in the buffer, the result is indeterminate, + * but is always guaranteed to be null terminated. + * + * Requires: + *\li 'len' > 0 + *\li 'buf' points to an array of at least len chars + * + */ + +void +isc_time_formatshorttimestamp(const isc_time_t *t, char *buf, unsigned int len); +/*%< + * Format the time 't' into the buffer 'buf' of length 'len', + * using the format "yyyymmddhhmmsssss" useful for file timestamping. + * If the text does not fit in the buffer, the result is indeterminate, + * but is always guaranteed to be null terminated. + * + * Requires: + *\li 'len' > 0 + *\li 'buf' points to an array of at least len chars + * + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/timer.h b/lib/isc/include/isc/timer.h new file mode 100644 index 0000000..815cf42 --- /dev/null +++ b/lib/isc/include/isc/timer.h @@ -0,0 +1,271 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/***** +***** Module Info +*****/ + +/*! \file isc/timer.h + * \brief Provides timers which are event sources in the task system. + * + * Three types of timers are supported: + * + *\li 'ticker' timers generate a periodic tick event. + * + *\li 'once' timers generate an idle timeout event if they are idle for too + * long, and generate a life timeout event if their lifetime expires. + * They are used to implement both (possibly expiring) idle timers and + * 'one-shot' timers. + * + *\li 'limited' timers generate a periodic tick event until they reach + * their lifetime when they generate a life timeout event. + * + *\li 'inactive' timers generate no events. + * + * Timers can change type. It is typical to create a timer as + * an 'inactive' timer and then change it into a 'ticker' or + * 'once' timer. + * + *\li MP: + * The module ensures appropriate synchronization of data structures it + * creates and manipulates. + * Clients of this module must not be holding a timer's task's lock when + * making a call that affects that timer. Failure to follow this rule + * can result in deadlock. + * The caller must ensure that isc_timermgr_destroy() is called only + * once for a given manager. + * + * \li Reliability: + * No anticipated impact. + * + * \li Resources: + * TBS + * + * \li Security: + * No anticipated impact. + * + * \li Standards: + * None. + */ + +/*** + *** Imports + ***/ + +#include <stdbool.h> + +#include <isc/event.h> +#include <isc/eventclass.h> +#include <isc/lang.h> +#include <isc/time.h> +#include <isc/types.h> + +ISC_LANG_BEGINDECLS + +/*** + *** Types + ***/ + +/*% Timer Type */ +typedef enum { + isc_timertype_undefined = -1, /*%< Undefined */ + isc_timertype_ticker = 0, /*%< Ticker */ + isc_timertype_once = 1, /*%< Once */ + isc_timertype_limited = 2, /*%< Limited */ + isc_timertype_inactive = 3 /*%< Inactive */ +} isc_timertype_t; + +typedef struct isc_timerevent isc_timerevent_t; + +struct isc_timerevent { + struct isc_event common; + isc_time_t due; + ISC_LINK(isc_timerevent_t) ev_timerlink; +}; + +#define ISC_TIMEREVENT_FIRSTEVENT (ISC_EVENTCLASS_TIMER + 0) +#define ISC_TIMEREVENT_TICK (ISC_EVENTCLASS_TIMER + 1) +#define ISC_TIMEREVENT_IDLE (ISC_EVENTCLASS_TIMER + 2) +#define ISC_TIMEREVENT_LIFE (ISC_EVENTCLASS_TIMER + 3) +#define ISC_TIMEREVENT_LASTEVENT (ISC_EVENTCLASS_TIMER + 65535) + +/*** + *** Timer and Timer Manager Functions + *** + *** Note: all Ensures conditions apply only if the result is success for + *** those functions which return an isc_result_t. + ***/ + +isc_result_t +isc_timer_create(isc_timermgr_t *manager, isc_timertype_t type, + const isc_time_t *expires, const isc_interval_t *interval, + isc_task_t *task, isc_taskaction_t action, void *arg, + isc_timer_t **timerp); +/*%< + * Create a new 'type' timer managed by 'manager'. The timers parameters + * are specified by 'expires' and 'interval'. Events will be posted to + * 'task' and when dispatched 'action' will be called with 'arg' as the + * arg value. The new timer is returned in 'timerp'. + * + * Notes: + * + *\li For ticker timers, the timer will generate a 'tick' event every + * 'interval' seconds. The value of 'expires' is ignored. + * + *\li For once timers, 'expires' specifies the time when a life timeout + * event should be generated. If 'expires' is 0 (the epoch), then no life + * timeout will be generated. 'interval' specifies how long the timer + * can be idle before it generates an idle timeout. If 0, then no + * idle timeout will be generated. + * + *\li If 'expires' is NULL, the epoch will be used. + * + * If 'interval' is NULL, the zero interval will be used. + * + * Requires: + * + *\li 'manager' is a valid manager + * + *\li 'task' is a valid task + * + *\li 'action' is a valid action + * + *\li 'expires' points to a valid time, or is NULL. + * + *\li 'interval' points to a valid interval, or is NULL. + * + *\li type == isc_timertype_inactive || + * ('expires' and 'interval' are not both 0) + * + *\li 'timerp' is a valid pointer, and *timerp == NULL + * + * Ensures: + * + *\li '*timerp' is attached to the newly created timer + * + *\li The timer is attached to the task + * + *\li An idle timeout will not be generated until at least Now + the + * timer's interval if 'timer' is a once timer with a non-zero + * interval. + * + * Returns: + * + *\li Success + *\li No memory + *\li Unexpected error + */ + +isc_result_t +isc_timer_reset(isc_timer_t *timer, isc_timertype_t type, + const isc_time_t *expires, const isc_interval_t *interval, + bool purge); +/*%< + * Change the timer's type, expires, and interval values to the given + * values. If 'purge' is TRUE, any pending events from this timer + * are purged from its task's event queue. + * + * Notes: + * + *\li If 'expires' is NULL, the epoch will be used. + * + *\li If 'interval' is NULL, the zero interval will be used. + * + * Requires: + * + *\li 'timer' is a valid timer + * + *\li The same requirements that isc_timer_create() imposes on 'type', + * 'expires' and 'interval' apply. + * + * Ensures: + * + *\li An idle timeout will not be generated until at least Now + the + * timer's interval if 'timer' is a once timer with a non-zero + * interval. + * + * Returns: + * + *\li Success + *\li No memory + *\li Unexpected error + */ + +isc_result_t +isc_timer_touch(isc_timer_t *timer); +/*%< + * Set the last-touched time of 'timer' to the current time. + * + * Requires: + * + *\li 'timer' is a valid once timer. + * + * Ensures: + * + *\li An idle timeout will not be generated until at least Now + the + * timer's interval if 'timer' is a once timer with a non-zero + * interval. + * + * Returns: + * + *\li Success + *\li Unexpected error + */ + +void +isc_timer_destroy(isc_timer_t **timerp); +/*%< + * Destroy *timerp. + * + * Requires: + * + *\li 'timerp' points to a valid timer. + * + * Ensures: + * + *\li *timerp is NULL. + * + *\code + * The timer will be shutdown + * + * The timer will detach from its task + * + * All resources used by the timer have been freed + * + * Any events already posted by the timer will be purged. + * Therefore, if isc_timer_destroy() is called in the context + * of the timer's task, it is guaranteed that no more + * timer event callbacks will run after the call. + * + * If this function is called from the timer event callback + * the event itself must be destroyed before the timer + * itself. + *\endcode + */ + +isc_timertype_t +isc_timer_gettype(isc_timer_t *timer); +/*%< + * Return the timer type. + * + * Requires: + * + *\li 'timer' to be a valid timer. + */ + +void +isc_timermgr_poke(isc_timermgr_t *m); + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/tls.h b/lib/isc/include/isc/tls.h new file mode 100644 index 0000000..efffffb --- /dev/null +++ b/lib/isc/include/isc/tls.h @@ -0,0 +1,587 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#include <isc/mem.h> +#include <isc/region.h> +#include <isc/result.h> +#include <isc/types.h> + +typedef struct ssl_ctx_st isc_tlsctx_t; +typedef struct ssl_st isc_tls_t; + +typedef struct x509_store_st isc_tls_cert_store_t; + +void +isc_tlsctx_free(isc_tlsctx_t **ctpx); +/*%< + * Free a TLS client or server context. + * + * Requires: + *\li 'ctxp' != NULL and '*ctxp' != NULL. + */ + +void +isc_tlsctx_attach(isc_tlsctx_t *src, isc_tlsctx_t **ptarget); +/*%< + * Attach to the TLS context. + * + * Requires: + *\li 'src' != NULL; + *\li 'ptarget' != NULL; + *\li '*ptarget' == NULL. + */ + +isc_result_t +isc_tlsctx_createserver(const char *keyfile, const char *certfile, + isc_tlsctx_t **ctxp); +/*%< + * Set up a TLS server context, using the key and certificate specified in + * 'keyfile' and 'certfile', or a self-generated ephemeral key and + * certificdate if both 'keyfile' and 'certfile' are NULL. + * + * Requires: + *\li 'ctxp' != NULL and '*ctxp' == NULL. + *\li 'keyfile' and 'certfile' are either both NULL or both non-NULL. + */ + +isc_result_t +isc_tlsctx_createclient(isc_tlsctx_t **ctxp); +/*%< + * Set up a TLS client context. + * + * Requires: + *\li 'ctxp' != NULL and '*ctxp' == NULL. + */ + +isc_result_t +isc_tlsctx_load_certificate(isc_tlsctx_t *ctx, const char *keyfile, + const char *certfile); +/*%< + * Load a TLS certificate into a TLS context. + * + * Requires: + *\li 'ctx' != NULL; + *\li 'keyfile' and 'certfile' are both non-NULL. + */ + +typedef enum isc_tls_protocol_version { + /* these must be the powers of two */ + ISC_TLS_PROTO_VER_1_2 = 1 << 0, + ISC_TLS_PROTO_VER_1_3 = 1 << 1, + ISC_TLS_PROTO_VER_UNDEFINED, +} isc_tls_protocol_version_t; + +void +isc_tlsctx_set_protocols(isc_tlsctx_t *ctx, const uint32_t tls_versions); +/*%< + * Sets the supported TLS protocol versions via the 'tls_versions' bit + * set argument (see `isc_tls_protocol_version_t` enum for the + * expected values). + * + * Requires: + *\li 'ctx' != NULL; + *\li 'tls_versions' != 0. + */ + +bool +isc_tls_protocol_supported(const isc_tls_protocol_version_t tls_ver); +/*%< + * Check in runtime that the specified TLS protocol versions is supported. + */ + +isc_tls_protocol_version_t +isc_tls_protocol_name_to_version(const char *name); +/*%< + * Convert the protocol version string into the version of + * 'isc_tls_protocol_version_t' type. + * Requires: + *\li 'name' != NULL. + */ + +bool +isc_tlsctx_load_dhparams(isc_tlsctx_t *ctx, const char *dhparams_file); +/*%< + * Load Diffie-Hellman parameters file and apply it to the given TLS context + * 'ctx'. + * + * Requires: + * \li 'ctx' != NULL; + * \li 'dhaprams_file' a valid pointer to a non empty string. + */ + +bool +isc_tls_cipherlist_valid(const char *cipherlist); +/*%< + * Check if cipher list string is valid. + * + * Requires: + * \li 'cipherlist' a valid pointer to a non empty string. + */ + +void +isc_tlsctx_set_cipherlist(isc_tlsctx_t *ctx, const char *cipherlist); +/*%< + * Set cipher list string for on the given TLS context 'ctx'. + * + * Requires: + * \li 'ctx' != NULL; + * \li 'cipherlist' a valid pointer to a non empty string. + */ + +void +isc_tlsctx_prefer_server_ciphers(isc_tlsctx_t *ctx, const bool prefer); +/*%< + * Make the given TLS context 'ctx' to prefer or to not prefer + * server side ciphers during the ciphers negotiation. + * + * Requires: + * \li 'ctx' != NULL. + */ + +void +isc_tlsctx_session_tickets(isc_tlsctx_t *ctx, const bool use); +/*%< + * Enable/Disable stateless session resumptions tickets on the given + * TLS context 'ctx' (see RFC5077). + * + * Requires: + * \li 'ctx' != NULL. + */ + +isc_tls_t * +isc_tls_create(isc_tlsctx_t *ctx); +/*%< + * Set up the structure to hold data for a new TLS connection. + * + * Requires: + *\li 'ctx' != NULL. + */ + +void +isc_tls_free(isc_tls_t **tlsp); +/*%< + * Free a TLS structure. + * + * Requires: + *\li 'tlsp' != NULL and '*tlsp' != NULL. + */ + +const char * +isc_tls_verify_peer_result_string(isc_tls_t *tls); +/*%< + * Return a user readable description of a remote peer's certificate + * validation. + * + * Requires: + *\li 'tls' != NULL. + */ + +#if HAVE_LIBNGHTTP2 +void +isc_tlsctx_enable_http2client_alpn(isc_tlsctx_t *ctx); +void +isc_tlsctx_enable_http2server_alpn(isc_tlsctx_t *ctx); +/*%< + * Enable HTTP/2 Application Layer Protocol Negotation for 'ctx'. + * + * Requires: + *\li 'ctx' is not NULL. + */ +#endif /* HAVE_LIBNGHTTP2 */ + +void +isc_tls_get_selected_alpn(isc_tls_t *tls, const unsigned char **alpn, + unsigned int *alpnlen); + +#define ISC_TLS_DOT_PROTO_ALPN_ID "dot" +#define ISC_TLS_DOT_PROTO_ALPN_ID_LEN 3 + +void +isc_tlsctx_enable_dot_client_alpn(isc_tlsctx_t *ctx); +void +isc_tlsctx_enable_dot_server_alpn(isc_tlsctx_t *ctx); +/*%< + * Enable DoT Application Layer Protocol Negotation for 'ctx'. + * + * Requires: + *\li 'ctx' is not NULL. + */ + +isc_result_t +isc_tlsctx_enable_peer_verification(isc_tlsctx_t *ctx, const bool is_server, + isc_tls_cert_store_t *store, + const char *hostname, + bool hostname_ignore_subject); +/*%< + * Enable peer certificate and, optionally, hostname (for client contexts) + * verification. + * + * Requires: + *\li 'ctx' is not NULL; + *\li 'store' is not NULL. + */ + +isc_result_t +isc_tlsctx_load_client_ca_names(isc_tlsctx_t *ctx, const char *ca_bundle_file); +/*%< + * Load the list of CA-certificate names from a CA-bundle file to + * send by the server to a client when requesting a peer certificate. + * Usually used in conjunction with + * isc_tlsctx_enable_peer_validation(). + * + * Requires: + *\li 'ctx' is not NULL; + *\li 'ca_bundle_file' is not NULL. + */ + +isc_result_t +isc_tls_cert_store_create(const char *ca_bundle_filename, + isc_tls_cert_store_t **pstore); +/*%< + * Create X509 certificate store. The 'ca_bundle_filename' might be + * 'NULL' or an empty string, which means use the default system wide + * bundle/directory. + * + * Requires: + *\li 'pstore' is a valid pointer to a pointer containing 'NULL'. + */ + +void +isc_tls_cert_store_free(isc_tls_cert_store_t **pstore); +/*%< + * Free X509 certificate store. + * + * Requires: + *\li 'pstore' is a valid pointer to a pointer containing a non-'NULL' value. + */ + +typedef struct isc_tlsctx_client_session_cache isc_tlsctx_client_session_cache_t; +/*%< + * TLS client session cache is an object which allows efficient + * storing and retrieval of previously saved TLS sessions so that they + * can be resumed. This object is supposed to be a foundation for + * implementing TLS session resumption - a standard technique to + * reduce the cost of re-establishing a connection to the remote + * server endpoint. + * + * OpenSSL does server-side TLS session caching transparently by + * default. However, on the client-side, a TLS session to resume must + * be manually specified when establishing the TLS connection. The TLS + * client session cache is precisely the foundation for that. + * + * The cache has been designed to have the following characteristics: + * + * - Fixed maximal number of entries to not keep too many obsolete + * sessions within the cache; + * + * - The cache is indexed by character string keys. Each string is a + * key representing a remote endpoint (unique remote endpoint name, + * e.g. combination of the remote IP address and port); + * + * - Least Recently Used (LRU) cache replacement policy while allowing + * easy removal of obsolete entries; + * + * - Ability to store multiple TLS sessions associated with the given + * key (remote endpoint name). This characteristic is important if + * multiple connections to the same remote server can be established; + * + * - Ability to efficiently retrieve the most recent TLS sessions + * associated with the key (remote endpoint name). + * + * Because of these characteristics, the cache will end up having the + * necessary amount of resumable TLS session parameters to the most + * used remote endpoints ("hot entries") after a short period of + * initial use ("warmup"). + * + * Attempting to resume TLS sessions is an optimisation, which is not + * guaranteed to succeed because it requires the same session to be + * present in the server session caches. If it is not the case, the + * usual handshake procedure takes place. However, when session + * resumption is successful, it reduces the amount of the + * computational resources required as well as the amount of data to + * be transmitted when (re)establishing the connection. Also, it + * reduces round trip time (by reducing the number of packets to + * transmit). + * + * This optimisation is important in the context of DNS because the + * amount of data within the full handshake messages might be + * comparable to or surpass the size of a typical DNS message. + */ + +void +isc_tlsctx_client_session_cache_create( + isc_mem_t *mctx, isc_tlsctx_t *ctx, const size_t max_entries, + isc_tlsctx_client_session_cache_t **cachep); +/*%< + * Create a new TLS client session cache object. + * + * Requires: + *\li 'mctx' is a valid memory context object; + *\li 'ctx' is a valid TLS context object; + *\li 'max_entries' is a positive number; + *\li 'cachep' is a valid pointer to a pointer which must be equal to NULL. + */ + +void +isc_tlsctx_client_session_cache_attach( + isc_tlsctx_client_session_cache_t *source, + isc_tlsctx_client_session_cache_t **targetp); +/*%< + * Create a reference to the TLS client session cache object. + * + * Requires: + *\li 'source' is a valid TLS client session cache object; + *\li 'targetp' is a valid pointer to a pointer which must equal NULL. + */ + +void +isc_tlsctx_client_session_cache_detach( + isc_tlsctx_client_session_cache_t **cachep); +/*%< + * Remove a reference to the TLS client session cache object. + * + * Requires: + *\li 'cachep' is a pointer to a pointer to a valid TLS client session cache + *object. + */ + +void +isc_tlsctx_client_session_cache_keep(isc_tlsctx_client_session_cache_t *cache, + char *remote_peer_name, isc_tls_t *tls); +/*%< + * Add a resumable TLS client session within 'tls' to the TLS client + * session cache object 'cache' and associate it with + * 'remote_server_name' string. Also, the oldest entry from the cache + * might get removed if the cache is full. + * + * Requires: + *\li 'cache' is a pointer to a valid TLS client session cache object; + *\li 'remote_peer_name' is a pointer to a non empty character string; + *\li 'tls' is a valid, non-'NULL' pointer to a TLS connection state object. + */ + +void +isc_tlsctx_client_session_cache_keep_sockaddr( + isc_tlsctx_client_session_cache_t *cache, isc_sockaddr_t *remote_peer, + isc_tls_t *tls); +/*%< + * The same as 'isc_tlsctx_client_session_cache_keep()', but uses a + * 'isc_sockaddr_t' as a key, instead of a character string. + * + * Requires: + *\li 'remote_peer' is a valid, non-'NULL', pointer to an 'isc_sockaddr_t' + *object. + */ + +void +isc_tlsctx_client_session_cache_reuse(isc_tlsctx_client_session_cache_t *cache, + char *remote_server_name, isc_tls_t *tls); +/*% + * Try to restore a previously stored TLS session denoted by a remote + * server name as a key ('remote_server_name') into the given TLS + * connection state object ('tls'). The successfully restored session + * gets removed from the cache. + * + * Requires: + *\li 'cache' is a pointer to a valid TLS client session cache object; + *\li 'remote_peer_name' is a pointer to a non empty character string; + *\li 'tls' is a valid, non-'NULL' pointer to a TLS connection state object. + */ + +void +isc_tlsctx_client_session_cache_reuse_sockaddr( + isc_tlsctx_client_session_cache_t *cache, isc_sockaddr_t *remote_peer, + isc_tls_t *tls); +/*%< + * The same as 'isc_tlsctx_client_session_cache_reuse()', but uses a + * 'isc_sockaddr_t' as a key, instead of a character string. + * + * Requires: + *\li 'remote_peer' is a valid, non-'NULL' pointer to an 'isc_sockaddr_t' + *object. + */ + +const isc_tlsctx_t * +isc_tlsctx_client_session_cache_getctx(isc_tlsctx_client_session_cache_t *cache); +/*%< + * Returns a TLS context associated with the given TLS client + * session cache object. The function is intended to be used to + * implement the sanity checks ('INSIST()'s and 'REQUIRE()'s). + * + * Requires: + *\li 'cache' is a pointer to a valid TLS client session cache object. + */ + +#define ISC_TLSCTX_CLIENT_SESSION_CACHE_DEFAULT_SIZE (150) +/*%< + * The default maximum size of a TLS client session cache. The value + * should be large enough to hold enough sessions to successfully + * re-establish connections to the most remote TLS servers, but not + * too big to avoid keeping too much obsolete sessions. + */ + +typedef struct isc_tlsctx_cache isc_tlsctx_cache_t; +/*%< + * The TLS context cache is an object which allows retrieving a + * previously created TLS context based on the following tuple: + * + * 1. The name of a TLS entry, as defined in the configuration file; + * 2. A transport type. Currently, only TLS (DoT) and HTTPS (DoH) are + * supported; + * 3. An IP address family (AF_INET or AF_INET6). + * + * There are multiple uses for this object: + * + * First, it allows reuse of client-side contexts during zone transfers. + * That, in turn, allows use of session caches associated with these + * contexts, which enables TLS session resumption, making establishment + * of XoT connections faster and computationally cheaper. + * + * Second, it can be extended to be used as storage for TLS context related + * data, as defined in 'tls' statements in the configuration file (for + * example, CA-bundle intermediate certificate storage, client-side contexts + * with pre-loaded certificates in a case of Mutual TLS, etc). This will + * be used to implement Strict/Mutual TLS. + * + * Third, it avoids creating an excessive number of server-side TLS + * contexts, which might help to reduce the number of contexts + * created during server initialisation and reconfiguration. + */ + +typedef enum { + isc_tlsctx_cache_none = 0, + isc_tlsctx_cache_tls, + isc_tlsctx_cache_https, + isc_tlsctx_cache_count +} isc_tlsctx_cache_transport_t; +/*%< TLS context cache transport type values. */ + +void +isc_tlsctx_cache_create(isc_mem_t *mctx, isc_tlsctx_cache_t **cachep); +/*%< + * Create a new TLS context cache object. + * + * Requires: + *\li 'mctx' is a valid memory context; + *\li 'cachep' is a valid pointer to a pointer which must be equal to NULL. + */ + +void +isc_tlsctx_cache_attach(isc_tlsctx_cache_t *source, + isc_tlsctx_cache_t **targetp); +/*%< + * Create a reference to the TLS context cache object. + * + * Requires: + *\li 'source' is a valid TLS context cache object; + *\li 'targetp' is a valid pointer to a pointer which must equal NULL. + */ + +void +isc_tlsctx_cache_detach(isc_tlsctx_cache_t **cachep); +/*%< + * Remove a reference to the TLS context cache object. + * + * Requires: + *\li 'cachep' is a pointer to a pointer to a valid TLS + * context cache object. + */ + +isc_result_t +isc_tlsctx_cache_add( + isc_tlsctx_cache_t *cache, const char *name, + const isc_tlsctx_cache_transport_t transport, const uint16_t family, + isc_tlsctx_t *ctx, isc_tls_cert_store_t *store, + isc_tlsctx_client_session_cache_t *client_sess_cache, + isc_tlsctx_t **pfound, isc_tls_cert_store_t **pfound_store, + isc_tlsctx_client_session_cache_t **pfound_client_sess_cache); +/*%< + * + * Add a new TLS context and its associated data to the TLS context + * cache. 'pfound' is an optional pointer, which can be used to + * retrieve an already existing TLS context object in a case it + * exists. + * + * The passed certificates store object ('store') possession is + * transferred to the cache object in a case of success. In some cases + * it might be destroyed immediately upon the call completion. + * + * The possession of the passed TLS client session cache + * ('client_sess_cache') is also transferred to the cache object in a + * case of success. + * + * Requires: + *\li 'cache' is a valid pointer to a TLS context cache object; + *\li 'name' is a valid pointer to a non-empty string; + *\li 'transport' is a valid transport identifier (currently only + * TLS/DoT and HTTPS/DoH are supported); + *\li 'family' - either 'AF_INET' or 'AF_INET6'; + *\li 'ctx' - a valid pointer to a valid TLS context object; + *\li 'store' - a valid pointer to a valid TLS certificates store object or + * 'NULL'; + *\li 'client_sess_cache' - a valid pointer to a valid TLS client sessions + *cache object or 'NULL. + * + * Returns: + *\li #ISC_R_EXISTS - node of the same key already exists; + *\li #ISC_R_SUCCESS - the new entry has been added successfully. + */ + +isc_result_t +isc_tlsctx_cache_find( + isc_tlsctx_cache_t *cache, const char *name, + const isc_tlsctx_cache_transport_t transport, const uint16_t family, + isc_tlsctx_t **pctx, isc_tls_cert_store_t **pstore, + isc_tlsctx_client_session_cache_t **pfound_client_sess_cache); +/*%< + * Look up a TLS context and its associated data in the TLS context cache. + * + * Requires: + *\li 'cache' is a valid pointer to a TLS context cache object; + *\li 'name' is a valid pointer to a non empty string; + *\li 'transport' - a valid transport identifier (currently only + * TLS/DoT and HTTPS/DoH are supported; + *\li 'family' - either 'AF_INET' or 'AF_INET6'; + *\li 'pctx' - a valid pointer to a non-NULL pointer; + *\li 'pstore' - a valid pointer to a non-NULL pointer or 'NULL'. + *\li 'pfound_client_sess_cache' - a valid pointer to a non-NULL pointer or + *'NULL'. + * + * Returns: + *\li #ISC_R_SUCCESS - the context has been found; + *\li #ISC_R_NOTFOUND - the context has not been found. In such a case, + * 'pstore' still might get initialised as there is one to many + * relation between stores and contexts. + */ + +void +isc_tlsctx_set_random_session_id_context(isc_tlsctx_t *ctx); +/*%< + * Set context within which session can be reused to a randomly + * generated value. This one is used for TLS session resumption using + * session IDs. See OpenSSL documentation for + * 'SSL_CTX_set_session_id_context()'. + * + * It might be worth noting that usually session ID contexts are kept + * static for an application and particular certificate + * combination. However, for the cases when exporting server side TLS + * session cache to/loading from external memory is not required, we + * might use random IDs just fine. See, + * e.g. 'ngx_ssl_session_id_context()' in NGINX for an example of how + * a session ID might be obtained. + * + * Requires: + *\li 'ctx' - a valid non-NULL pointer; + */ diff --git a/lib/isc/include/isc/tm.h b/lib/isc/include/isc/tm.h new file mode 100644 index 0000000..58feec4 --- /dev/null +++ b/lib/isc/include/isc/tm.h @@ -0,0 +1,39 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +/*! \file isc/tm.h + * Provides portable conversion routines for struct tm. + */ +#include <time.h> + +#include <isc/lang.h> +#include <isc/types.h> + +ISC_LANG_BEGINDECLS + +time_t +isc_tm_timegm(struct tm *tm); +/* + * Convert a tm structure to time_t, using UTC rather than the local + * time zone. + */ + +char * +isc_tm_strptime(const char *buf, const char *fmt, struct tm *tm); +/* + * Parse a formatted date string into struct tm. + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/types.h b/lib/isc/include/isc/types.h new file mode 100644 index 0000000..7e0fc02 --- /dev/null +++ b/lib/isc/include/isc/types.h @@ -0,0 +1,133 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#include <isc/result.h> + +/*! \file isc/types.h + * \brief + * OS-specific types, from the OS-specific include directories. + */ +#include <inttypes.h> +#include <stdbool.h> + +#include <isc/offset.h> + +/* + * XXXDCL This is just for ISC_LIST and ISC_LINK, but gets all of the other + * list macros too. + */ +#include <isc/list.h> + +/* Core Types. Alphabetized by defined type. */ + +typedef struct isc_astack isc_astack_t; /*%< Array-based fast stack */ +typedef struct isc_appctx isc_appctx_t; /*%< Application context */ +typedef struct isc_buffer isc_buffer_t; /*%< Buffer */ +typedef ISC_LIST(isc_buffer_t) isc_bufferlist_t; /*%< Buffer List */ +typedef struct isc_constregion isc_constregion_t; /*%< Const region */ +typedef struct isc_consttextregion isc_consttextregion_t; /*%< Const Text Region + */ +typedef struct isc_counter isc_counter_t; /*%< Counter */ +typedef struct isc_event isc_event_t; /*%< Event */ +typedef ISC_LIST(isc_event_t) isc_eventlist_t; /*%< Event List */ +typedef unsigned int isc_eventtype_t; /*%< Event Type */ +typedef struct isc_hash isc_hash_t; /*%< Hash */ +typedef struct isc_httpd isc_httpd_t; /*%< HTTP client */ +typedef void(isc_httpdfree_t)(isc_buffer_t *, void *); /*%< HTTP free function + */ +typedef struct isc_httpdmgr isc_httpdmgr_t; /*%< HTTP manager */ +typedef struct isc_httpdurl isc_httpdurl_t; /*%< HTTP URL */ +typedef void(isc_httpdondestroy_t)(void *); /*%< Callback on destroying httpd */ +typedef struct isc_interface isc_interface_t; /*%< Interface */ +typedef struct isc_interfaceiter isc_interfaceiter_t; /*%< Interface Iterator */ +typedef struct isc_interval isc_interval_t; /*%< Interval */ +typedef struct isc_lex isc_lex_t; /*%< Lex */ +typedef struct isc_log isc_log_t; /*%< Log */ +typedef struct isc_logcategory isc_logcategory_t; /*%< Log Category */ +typedef struct isc_logconfig isc_logconfig_t; /*%< Log Configuration */ +typedef struct isc_logmodule isc_logmodule_t; /*%< Log Module */ +typedef struct isc_mem isc_mem_t; /*%< Memory */ +typedef struct isc_mempool isc_mempool_t; /*%< Memory Pool */ +typedef struct isc_netaddr isc_netaddr_t; /*%< Net Address */ +typedef struct isc_netprefix isc_netprefix_t; /*%< Net Prefix */ +typedef struct isc_nm isc_nm_t; /*%< Network manager */ +typedef struct isc_nmsocket isc_nmsocket_t; /*%< Network manager socket */ +typedef struct isc_nmhandle isc_nmhandle_t; /*%< Network manager handle */ +typedef struct isc_portset isc_portset_t; /*%< Port Set */ +typedef struct isc_quota isc_quota_t; /*%< Quota */ +typedef struct isc_ratelimiter isc_ratelimiter_t; /*%< Rate Limiter */ +typedef struct isc_region isc_region_t; /*%< Region */ +typedef uint64_t isc_resourcevalue_t; /*%< Resource Value */ +typedef struct isc_rwlock isc_rwlock_t; /*%< Read Write Lock */ +typedef struct isc_sockaddr isc_sockaddr_t; /*%< Socket Address */ +typedef ISC_LIST(isc_sockaddr_t) isc_sockaddrlist_t; /*%< Socket Address List + * */ +typedef struct isc_stats isc_stats_t; /*%< Statistics */ +typedef int_fast64_t isc_statscounter_t; +typedef struct isc_symtab isc_symtab_t; /*%< Symbol Table */ +typedef struct isc_task isc_task_t; /*%< Task */ +typedef ISC_LIST(isc_task_t) isc_tasklist_t; /*%< Task List */ +typedef struct isc_taskmgr isc_taskmgr_t; /*%< Task Manager */ +typedef struct isc_textregion isc_textregion_t; /*%< Text Region */ +typedef struct isc_time isc_time_t; /*%< Time */ +typedef struct isc_timer isc_timer_t; /*%< Timer */ +typedef struct isc_timermgr isc_timermgr_t; /*%< Timer Manager */ + +#if HAVE_LIBNGHTTP2 +typedef struct isc_nm_http_endpoints isc_nm_http_endpoints_t; +/*%< HTTP endpoints set */ +#endif /* HAVE_LIBNGHTTP2 */ + +typedef void (*isc_taskaction_t)(isc_task_t *, isc_event_t *); + +/*% Resource */ +typedef enum { + isc_resource_coresize = 1, + isc_resource_cputime, + isc_resource_datasize, + isc_resource_filesize, + isc_resource_lockedmemory, + isc_resource_openfiles, + isc_resource_processes, + isc_resource_residentsize, + isc_resource_stacksize +} isc_resource_t; + +/*% Statistics formats (text file or XML) */ +typedef enum { + isc_statsformat_file, + isc_statsformat_xml, + isc_statsformat_json +} isc_statsformat_t; + +typedef enum isc_nmsocket_type { + isc_nm_nonesocket = 0, + isc_nm_udpsocket = 1 << 1, + isc_nm_tcpsocket = 1 << 2, + isc_nm_tcpdnssocket = 1 << 3, + isc_nm_tlssocket = 1 << 4, + isc_nm_tlsdnssocket = 1 << 5, + isc_nm_httpsocket = 1 << 6, + isc_nm_maxsocket, + + isc_nm_udplistener, /* Aggregate of nm_udpsocks */ + isc_nm_tcplistener, + isc_nm_tlslistener, + isc_nm_tcpdnslistener, + isc_nm_tlsdnslistener, + isc_nm_httplistener +} isc_nmsocket_type; + +typedef isc_nmsocket_type isc_nmsocket_type_t; diff --git a/lib/isc/include/isc/url.h b/lib/isc/include/isc/url.h new file mode 100644 index 0000000..d3b935b --- /dev/null +++ b/lib/isc/include/isc/url.h @@ -0,0 +1,85 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 and MIT + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +/* + * Copyright Joyent, Inc. and other Node contributors. All rights reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#pragma once + +#include <stdbool.h> +#include <stddef.h> +#include <stdint.h> + +#include <isc/result.h> + +/* + * Compile with -DHTTP_PARSER_STRICT=0 to make less checks, but run + * faster + */ +#ifndef HTTP_PARSER_STRICT +#define HTTP_PARSER_STRICT 1 +#endif + +typedef enum { + ISC_UF_SCHEMA = 0, + ISC_UF_HOST = 1, + ISC_UF_PORT = 2, + ISC_UF_PATH = 3, + ISC_UF_QUERY = 4, + ISC_UF_FRAGMENT = 5, + ISC_UF_USERINFO = 6, + ISC_UF_MAX = 7 +} isc_url_field_t; + +/* Result structure for isc_url_parse(). + * + * Callers should index into field_data[] with UF_* values iff field_set + * has the relevant (1 << UF_*) bit set. As a courtesy to clients (and + * because we probably have padding left over), we convert any port to + * a uint16_t. + */ +typedef struct { + uint16_t field_set; /* Bitmask of (1 << UF_*) values */ + uint16_t port; /* Converted UF_PORT string */ + + struct { + uint16_t off; /* Offset into buffer in which field starts */ + uint16_t len; /* Length of run in buffer */ + } field_data[ISC_UF_MAX]; +} isc_url_parser_t; + +isc_result_t +isc_url_parse(const char *buf, size_t buflen, bool is_connect, + isc_url_parser_t *up); +/*%< + * Parse a URL; return nonzero on failure + */ diff --git a/lib/isc/include/isc/utf8.h b/lib/isc/include/isc/utf8.h new file mode 100644 index 0000000..5643c5d --- /dev/null +++ b/lib/isc/include/isc/utf8.h @@ -0,0 +1,43 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +/*! \file isc/utf8.h */ + +#pragma once + +#include <isc/lang.h> +#include <isc/types.h> + +ISC_LANG_BEGINDECLS + +bool +isc_utf8_bom(const unsigned char *buf, size_t len); +/*< + * Returns 'true' if the string of bytes in 'buf' starts + * with an UTF-8 Byte Order Mark. + * + * Requires: + *\li 'buf' != NULL + */ + +bool +isc_utf8_valid(const unsigned char *buf, size_t len); +/*< + * Returns 'true' if the string of bytes in 'buf' is a valid UTF-8 + * byte sequence otherwise 'false' is returned. + * + * Requires: + *\li 'buf' != NULL + */ + +ISC_LANG_ENDDECLS diff --git a/lib/isc/include/isc/util.h b/lib/isc/include/isc/util.h new file mode 100644 index 0000000..922661b --- /dev/null +++ b/lib/isc/include/isc/util.h @@ -0,0 +1,377 @@ +/* + * Copyright (C) Internet Systems Consortium, Inc. ("ISC") + * + * SPDX-License-Identifier: MPL-2.0 + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, you can obtain one at https://mozilla.org/MPL/2.0/. + * + * See the COPYRIGHT file distributed with this work for additional + * information regarding copyright ownership. + */ + +#pragma once + +#include <inttypes.h> + +/*! \file isc/util.h + * NOTE: + * + * This file is not to be included from any <isc/???.h> (or other) library + * files. + * + * \brief + * Including this file puts several macros in your name space that are + * not protected (as all the other ISC functions/macros do) by prepending + * ISC_ or isc_ to the name. + */ + +/*** + *** Clang Compatibility Macros + ***/ + +#if !defined(__has_attribute) +#define __has_attribute(x) 0 +#endif /* if !defined(__has_attribute) */ + +#if !defined(__has_c_attribute) +#define __has_c_attribute(x) 0 +#endif /* if !defined(__has_c_attribute) */ + +#if !defined(__has_feature) +#define __has_feature(x) 0 +#endif /* if !defined(__has_feature) */ + +/*** + *** General Macros. + ***/ + +/*% + * Use this to hide unused function arguments. + * \code + * int + * foo(char *bar) + * { + * UNUSED(bar); + * } + * \endcode + */ +#define UNUSED(x) (void)(x) + +#if __GNUC__ >= 8 && !defined(__clang__) +#define ISC_NONSTRING __attribute__((nonstring)) +#else /* if __GNUC__ >= 8 && !defined(__clang__) */ +#define ISC_NONSTRING +#endif /* __GNUC__ */ + +#if __has_c_attribute(fallthrough) +#define FALLTHROUGH [[fallthrough]] +#elif __GNUC__ >= 7 && !defined(__clang__) +#define FALLTHROUGH __attribute__((fallthrough)) +#else +/* clang-format off */ +#define FALLTHROUGH do {} while (0) /* FALLTHROUGH */ +/* clang-format on */ +#endif + +#if HAVE_FUNC_ATTRIBUTE_CONSTRUCTOR && HAVE_FUNC_ATTRIBUTE_DESTRUCTOR +#define ISC_CONSTRUCTOR __attribute__((constructor)) +#define ISC_DESTRUCTOR __attribute__((destructor)) +#else +#define ISC_CONSTRUCTOR +#define ISC_DESTRUCTOR +#endif + +/*% + * The opposite: silent warnings about stored values which are never read. + */ +#define POST(x) (void)(x) + +#define ISC_MAX(a, b) ((a) > (b) ? (a) : (b)) +#define ISC_MIN(a, b) ((a) < (b) ? (a) : (b)) + +#define ISC_CLAMP(v, x, y) ((v) < (x) ? (x) : ((v) > (y) ? (y) : (v))) + +/*% + * Use this to remove the const qualifier of a variable to assign it to + * a non-const variable or pass it as a non-const function argument ... + * but only when you are sure it won't then be changed! + * This is necessary to sometimes shut up some compilers + * (as with gcc -Wcast-qual) when there is just no other good way to avoid the + * situation. + */ +#define DE_CONST(konst, var) \ + do { \ + union { \ + const void *k; \ + void *v; \ + } _u; \ + _u.k = konst; \ + var = _u.v; \ + } while (0) + +#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0])) + +/*% + * Use this in translation units that would otherwise be empty, to + * suppress compiler warnings. + */ +#define EMPTY_TRANSLATION_UNIT extern int isc__empty; + +/*% + * We use macros instead of calling the routines directly because + * the capital letters make the locking stand out. + * We RUNTIME_CHECK for success since in general there's no way + * for us to continue if they fail. + */ + +#ifdef ISC_UTIL_TRACEON +#define ISC_UTIL_TRACE(a) a +#include <stdio.h> /* Required for fprintf/stderr when tracing. */ +#else /* ifdef ISC_UTIL_TRACEON */ +#define ISC_UTIL_TRACE(a) +#endif /* ifdef ISC_UTIL_TRACEON */ + +#include <isc/result.h> /* Contractual promise. */ + +#define LOCK(lp) \ + do { \ + ISC_UTIL_TRACE(fprintf(stderr, "LOCKING %p %s %d\n", (lp), \ + __FILE__, __LINE__)); \ + RUNTIME_CHECK(isc_mutex_lock((lp)) == ISC_R_SUCCESS); \ + ISC_UTIL_TRACE(fprintf(stderr, "LOCKED %p %s %d\n", (lp), \ + __FILE__, __LINE__)); \ + } while (0) +#define UNLOCK(lp) \ + do { \ + RUNTIME_CHECK(isc_mutex_unlock((lp)) == ISC_R_SUCCESS); \ + ISC_UTIL_TRACE(fprintf(stderr, "UNLOCKED %p %s %d\n", (lp), \ + __FILE__, __LINE__)); \ + } while (0) + +#define BROADCAST(cvp) \ + do { \ + ISC_UTIL_TRACE(fprintf(stderr, "BROADCAST %p %s %d\n", (cvp), \ + __FILE__, __LINE__)); \ + RUNTIME_CHECK(isc_condition_broadcast((cvp)) == \ + ISC_R_SUCCESS); \ + } while (0) +#define SIGNAL(cvp) \ + do { \ + ISC_UTIL_TRACE(fprintf(stderr, "SIGNAL %p %s %d\n", (cvp), \ + __FILE__, __LINE__)); \ + RUNTIME_CHECK(isc_condition_signal((cvp)) == ISC_R_SUCCESS); \ + } while (0) +#define WAIT(cvp, lp) \ + do { \ + ISC_UTIL_TRACE(fprintf(stderr, "WAIT %p LOCK %p %s %d\n", \ + (cvp), (lp), __FILE__, __LINE__)); \ + RUNTIME_CHECK(isc_condition_wait((cvp), (lp)) == \ + ISC_R_SUCCESS); \ + ISC_UTIL_TRACE(fprintf(stderr, "WAITED %p LOCKED %p %s %d\n", \ + (cvp), (lp), __FILE__, __LINE__)); \ + } while (0) + +/* + * isc_condition_waituntil can return ISC_R_TIMEDOUT, so we + * don't RUNTIME_CHECK the result. + * + * XXX Also, can't really debug this then... + */ + +#define WAITUNTIL(cvp, lp, tp) isc_condition_waituntil((cvp), (lp), (tp)) + +#define RWLOCK(lp, t) \ + do { \ + ISC_UTIL_TRACE(fprintf(stderr, "RWLOCK %p, %d %s %d\n", (lp), \ + (t), __FILE__, __LINE__)); \ + RUNTIME_CHECK(isc_rwlock_lock((lp), (t)) == ISC_R_SUCCESS); \ + ISC_UTIL_TRACE(fprintf(stderr, "RWLOCKED %p, %d %s %d\n", \ + (lp), (t), __FILE__, __LINE__)); \ + } while (0) +#define RWUNLOCK(lp, t) \ + do { \ + ISC_UTIL_TRACE(fprintf(stderr, "RWUNLOCK %p, %d %s %d\n", \ + (lp), (t), __FILE__, __LINE__)); \ + RUNTIME_CHECK(isc_rwlock_unlock((lp), (t)) == ISC_R_SUCCESS); \ + } while (0) + +/* + * List Macros. + */ +#include <isc/list.h> /* Contractual promise. */ + +#define LIST(type) ISC_LIST(type) +#define INIT_LIST(type) ISC_LIST_INIT(type) +#define LINK(type) ISC_LINK(type) +#define INIT_LINK(elt, link) ISC_LINK_INIT(elt, link) +#define HEAD(list) ISC_LIST_HEAD(list) +#define TAIL(list) ISC_LIST_TAIL(list) +#define EMPTY(list) ISC_LIST_EMPTY(list) +#define PREV(elt, link) ISC_LIST_PREV(elt, link) +#define NEXT(elt, link) ISC_LIST_NEXT(elt, link) +#define APPEND(list, elt, link) ISC_LIST_APPEND(list, elt, link) +#define PREPEND(list, elt, link) ISC_LIST_PREPEND(list, elt, link) +#define UNLINK(list, elt, link) ISC_LIST_UNLINK(list, elt, link) +#define ENQUEUE(list, elt, link) ISC_LIST_APPEND(list, elt, link) +#define DEQUEUE(list, elt, link) ISC_LIST_UNLINK(list, elt, link) +#define INSERTBEFORE(li, b, e, ln) ISC_LIST_INSERTBEFORE(li, b, e, ln) +#define INSERTAFTER(li, a, e, ln) ISC_LIST_INSERTAFTER(li, a, e, ln) +#define APPENDLIST(list1, list2, link) ISC_LIST_APPENDLIST(list1, list2, link) + +/*% + * Performance + */ + +/* GCC defines __SANITIZE_ADDRESS__, so reuse the macro for clang */ +#if __has_feature(address_sanitizer) +#define __SANITIZE_ADDRESS__ 1 +#endif /* if __has_feature(address_sanitizer) */ + +#if __has_feature(thread_sanitizer) +#define __SANITIZE_THREAD__ 1 +#endif /* if __has_feature(thread_sanitizer) */ + +#if __SANITIZE_THREAD__ +#define ISC_NO_SANITIZE_THREAD __attribute__((no_sanitize("thread"))) +#else /* if __SANITIZE_THREAD__ */ +#define ISC_NO_SANITIZE_THREAD +#endif /* if __SANITIZE_THREAD__ */ + +#if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR >= 6) +#define STATIC_ASSERT(cond, msg) _Static_assert(cond, msg) +#elif __has_feature(c_static_assert) +#define STATIC_ASSERT(cond, msg) _Static_assert(cond, msg) +#else /* if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR >= 6) */ + +/* Courtesy of Joseph Quinsey: https://godbolt.org/z/K9RvWS */ +#define TOKENPASTE(a, b) a##b /* "##" is the "Token Pasting Operator" */ +#define EXPAND_THEN_PASTE(a, b) TOKENPASTE(a, b) /* expand then paste */ +#define STATIC_ASSERT(x, msg) \ + enum { EXPAND_THEN_PASTE(ASSERT_line_, __LINE__) = 1 / ((msg) && (x)) } +#endif /* if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR >= 6) */ + +#ifdef UNIT_TESTING +extern void +mock_assert(const int result, const char *const expression, + const char *const file, const int line); +/* + * Allow clang to determine that the following code is not reached + * by calling abort() if the condition fails. The abort() will + * never be executed as mock_assert() and _assert_true() longjmp + * or exit if the condition is false. + */ +#define REQUIRE(expression) \ + ((!(expression)) \ + ? (mock_assert(0, #expression, __FILE__, __LINE__), abort()) \ + : (void)0) +#define ENSURE(expression) \ + ((!(int)(expression)) \ + ? (mock_assert(0, #expression, __FILE__, __LINE__), abort()) \ + : (void)0) +#define INSIST(expression) \ + ((!(expression)) \ + ? (mock_assert(0, #expression, __FILE__, __LINE__), abort()) \ + : (void)0) +#define INVARIANT(expression) \ + ((!(expression)) \ + ? (mock_assert(0, #expression, __FILE__, __LINE__), abort()) \ + : (void)0) +#define UNREACHABLE() \ + (mock_assert(0, "unreachable", __FILE__, __LINE__), abort()) +#define _assert_true(c, e, f, l) \ + ((c) ? (void)0 : (_assert_true(0, e, f, l), abort())) +#define _assert_int_equal(a, b, f, l) \ + (((a) == (b)) ? (void)0 : (_assert_int_equal(a, b, f, l), abort())) +#define _assert_int_not_equal(a, b, f, l) \ + (((a) != (b)) ? (void)0 : (_assert_int_not_equal(a, b, f, l), abort())) +#else /* UNIT_TESTING */ + +/* + * Assertions + */ +#include <isc/assertions.h> /* Contractual promise. */ + +/*% Require Assertion */ +#define REQUIRE(e) ISC_REQUIRE(e) +/*% Ensure Assertion */ +#define ENSURE(e) ISC_ENSURE(e) +/*% Insist Assertion */ +#define INSIST(e) ISC_INSIST(e) +/*% Invariant Assertion */ +#define INVARIANT(e) ISC_INVARIANT(e) + +#define UNREACHABLE() ISC_UNREACHABLE() + +#endif /* UNIT_TESTING */ + +/* + * Errors + */ +#include <isc/error.h> /* Contractual promise. */ +#include <isc/strerr.h> /* for ISC_STRERRORSIZE */ + +#define UNEXPECTED_ERROR(...) \ + isc_error_unexpected(__FILE__, __LINE__, __func__, __VA_ARGS__) + +#define FATAL_ERROR(...) \ + isc_error_fatal(__FILE__, __LINE__, __func__, __VA_ARGS__) + +#define REPORT_SYSERROR(report, err, fmt, ...) \ + { \ + char strerr[ISC_STRERRORSIZE]; \ + strerror_r(err, strerr, sizeof(strerr)); \ + report(__FILE__, __LINE__, __func__, fmt ": %s (%d)", \ + ##__VA_ARGS__, strerr, err); \ + } + +#define UNEXPECTED_SYSERROR(err, ...) \ + REPORT_SYSERROR(isc_error_unexpected, err, __VA_ARGS__) + +#define FATAL_SYSERROR(err, ...) \ + REPORT_SYSERROR(isc_error_fatal, err, __VA_ARGS__) + +#ifdef UNIT_TESTING + +#define RUNTIME_CHECK(cond) \ + ((cond) ? (void)0 \ + : (mock_assert(0, #cond, __FILE__, __LINE__), abort())) + +#else /* UNIT_TESTING */ + +#define RUNTIME_CHECK(cond) \ + ((cond) ? (void)0 : FATAL_ERROR("RUNTIME_CHECK(%s) failed", #cond)) + +#endif /* UNIT_TESTING */ + +/*% + * Time + */ +#define TIME_NOW(tp) RUNTIME_CHECK(isc_time_now((tp)) == ISC_R_SUCCESS) +#define TIME_NOW_HIRES(tp) \ + RUNTIME_CHECK(isc_time_now_hires((tp)) == ISC_R_SUCCESS) + +/*% + * Alignment + */ +#ifdef __GNUC__ +#define ISC_ALIGN(x, a) (((x) + (a)-1) & ~((typeof(x))(a)-1)) +#else /* ifdef __GNUC__ */ +#define ISC_ALIGN(x, a) (((x) + (a)-1) & ~((uintmax_t)(a)-1)) +#endif /* ifdef __GNUC__ */ + +/*% + * Misc + */ +#include <isc/deprecated.h> + +/*% + * Swap + */ +#define ISC_SWAP(a, b) \ + { \ + typeof(a) __tmp_swap = a; \ + a = b; \ + b = __tmp_swap; \ + } |