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diff --git a/include/http_core.h b/include/http_core.h new file mode 100644 index 0000000..35df5dc --- /dev/null +++ b/include/http_core.h @@ -0,0 +1,1049 @@ +/* Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +/** + * @file http_core.h + * @brief CORE HTTP Daemon + * + * @defgroup APACHE_CORE_HTTPD Core HTTP Daemon + * @ingroup APACHE_CORE + * @{ + */ + +#ifndef APACHE_HTTP_CORE_H +#define APACHE_HTTP_CORE_H + +#include "apr.h" +#include "apr_hash.h" +#include "apr_optional.h" +#include "util_filter.h" +#include "ap_expr.h" +#include "apr_tables.h" + +#include "http_config.h" + +#if APR_HAVE_STRUCT_RLIMIT +#include <sys/time.h> +#include <sys/resource.h> +#endif + + +#ifdef __cplusplus +extern "C" { +#endif + +/* **************************************************************** + * + * The most basic server code is encapsulated in a single module + * known as the core, which is just *barely* functional enough to + * serve documents, though not terribly well. + * + * Largely for NCSA back-compatibility reasons, the core needs to + * make pieces of its config structures available to other modules. + * The accessors are declared here, along with the interpretation + * of one of them (allow_options). + */ + +/** + * @defgroup APACHE_CORE_HTTPD_ACESSORS Acessors + * + * @brief File/Directory Accessor directives + * + * @{ + */ + +/** No directives */ +#define OPT_NONE 0 +/** Indexes directive */ +#define OPT_INDEXES 1 +/** SSI is enabled without exec= permission */ +#define OPT_INCLUDES 2 +/** FollowSymLinks directive */ +#define OPT_SYM_LINKS 4 +/** ExecCGI directive */ +#define OPT_EXECCGI 8 +/** directive unset */ +#define OPT_UNSET 16 +/** SSI exec= permission is permitted, iff OPT_INCLUDES is also set */ +#define OPT_INC_WITH_EXEC 32 +/** SymLinksIfOwnerMatch directive */ +#define OPT_SYM_OWNER 64 +/** MultiViews directive */ +#define OPT_MULTI 128 +/** All directives */ +#define OPT_ALL (OPT_INDEXES|OPT_INCLUDES|OPT_INC_WITH_EXEC|OPT_SYM_LINKS|OPT_EXECCGI) +/** @} */ + +/** + * @defgroup get_remote_host Remote Host Resolution + * @ingroup APACHE_CORE_HTTPD + * @{ + */ +/** REMOTE_HOST returns the hostname, or NULL if the hostname + * lookup fails. It will force a DNS lookup according to the + * HostnameLookups setting. + */ +#define REMOTE_HOST (0) + +/** REMOTE_NAME returns the hostname, or the dotted quad if the + * hostname lookup fails. It will force a DNS lookup according + * to the HostnameLookups setting. + */ +#define REMOTE_NAME (1) + +/** REMOTE_NOLOOKUP is like REMOTE_NAME except that a DNS lookup is + * never forced. + */ +#define REMOTE_NOLOOKUP (2) + +/** REMOTE_DOUBLE_REV will always force a DNS lookup, and also force + * a double reverse lookup, regardless of the HostnameLookups + * setting. The result is the (double reverse checked) hostname, + * or NULL if any of the lookups fail. + */ +#define REMOTE_DOUBLE_REV (3) + +/** @} // get_remote_host */ + +/** all of the requirements must be met */ +#define SATISFY_ALL 0 +/** any of the requirements must be met */ +#define SATISFY_ANY 1 +/** There are no applicable satisfy lines */ +#define SATISFY_NOSPEC 2 + +/** Make sure we don't write less than 8000 bytes at any one time. + */ +#define AP_MIN_BYTES_TO_WRITE 8000 + +/** default maximum of internal redirects */ +# define AP_DEFAULT_MAX_INTERNAL_REDIRECTS 10 + +/** default maximum subrequest nesting level */ +# define AP_DEFAULT_MAX_SUBREQ_DEPTH 10 + +/** + * Retrieve the value of Options for this request + * @param r The current request + * @return the Options bitmask + */ +AP_DECLARE(int) ap_allow_options(request_rec *r); + +/** + * Retrieve the value of the AllowOverride for this request + * @param r The current request + * @return the overrides bitmask + */ +AP_DECLARE(int) ap_allow_overrides(request_rec *r); + +/** + * Retrieve the document root for this server + * @param r The current request + * @warning Don't use this! If your request went through a Userdir, or + * something like that, it'll screw you. But it's back-compatible... + * @return The document root + */ +AP_DECLARE(const char *) ap_document_root(request_rec *r); + +/** + * Lookup the remote user agent's DNS name or IP address + * @ingroup get_remote_hostname + * @param req The current request + * @param type The type of lookup to perform. One of: + * <pre> + * REMOTE_HOST returns the hostname, or NULL if the hostname + * lookup fails. It will force a DNS lookup according to the + * HostnameLookups setting. + * REMOTE_NAME returns the hostname, or the dotted quad if the + * hostname lookup fails. It will force a DNS lookup according + * to the HostnameLookups setting. + * REMOTE_NOLOOKUP is like REMOTE_NAME except that a DNS lookup is + * never forced. + * REMOTE_DOUBLE_REV will always force a DNS lookup, and also force + * a double reverse lookup, regardless of the HostnameLookups + * setting. The result is the (double reverse checked) + * hostname, or NULL if any of the lookups fail. + * </pre> + * @param str_is_ip unless NULL is passed, this will be set to non-zero on + * output when an IP address string is returned + * @return The remote hostname (based on the request useragent_ip) + */ +AP_DECLARE(const char *) ap_get_useragent_host(request_rec *req, int type, + int *str_is_ip); + +/** + * Lookup the remote client's DNS name or IP address + * @ingroup get_remote_host + * @param conn The current connection + * @param dir_config The directory config vector from the request + * @param type The type of lookup to perform. One of: + * <pre> + * REMOTE_HOST returns the hostname, or NULL if the hostname + * lookup fails. It will force a DNS lookup according to the + * HostnameLookups setting. + * REMOTE_NAME returns the hostname, or the dotted quad if the + * hostname lookup fails. It will force a DNS lookup according + * to the HostnameLookups setting. + * REMOTE_NOLOOKUP is like REMOTE_NAME except that a DNS lookup is + * never forced. + * REMOTE_DOUBLE_REV will always force a DNS lookup, and also force + * a double reverse lookup, regardless of the HostnameLookups + * setting. The result is the (double reverse checked) + * hostname, or NULL if any of the lookups fail. + * </pre> + * @param str_is_ip unless NULL is passed, this will be set to non-zero on output when an IP address + * string is returned + * @return The remote hostname (based on the connection client_ip) + */ +AP_DECLARE(const char *) ap_get_remote_host(conn_rec *conn, void *dir_config, int type, int *str_is_ip); + +/** + * Retrieve the login name of the remote user. Undef if it could not be + * determined + * @param r The current request + * @return The user logged in to the client machine + */ +AP_DECLARE(const char *) ap_get_remote_logname(request_rec *r); + +/* Used for constructing self-referencing URLs, and things like SERVER_PORT, + * and SERVER_NAME. + */ +/** + * build a fully qualified URL from the uri and information in the request rec + * @param p The pool to allocate the URL from + * @param uri The path to the requested file + * @param r The current request + * @return A fully qualified URL + */ +AP_DECLARE(char *) ap_construct_url(apr_pool_t *p, const char *uri, request_rec *r); + +/** + * Get the current server name from the request + * @param r The current request + * @return the server name + */ +AP_DECLARE(const char *) ap_get_server_name(request_rec *r); + +/** + * Get the current server name from the request for the purposes + * of using in a URL. If the server name is an IPv6 literal + * address, it will be returned in URL format (e.g., "[fe80::1]"). + * @param r The current request + * @return the server name + */ +AP_DECLARE(const char *) ap_get_server_name_for_url(request_rec *r); + +/** + * Get the current server port + * @param r The current request + * @return The server's port + */ +AP_DECLARE(apr_port_t) ap_get_server_port(const request_rec *r); + +/** + * Return the limit on bytes in request msg body + * @param r The current request + * @return the maximum number of bytes in the request msg body + */ +AP_DECLARE(apr_off_t) ap_get_limit_req_body(const request_rec *r); + +/** + * Return the limit on bytes in XML request msg body + * @param r The current request + * @return the maximum number of bytes in XML request msg body + */ +AP_DECLARE(apr_size_t) ap_get_limit_xml_body(const request_rec *r); + +/** + * Install a custom response handler for a given status + * @param r The current request + * @param status The status for which the custom response should be used + * @param string The custom response. This can be a static string, a file + * or a URL + */ +AP_DECLARE(void) ap_custom_response(request_rec *r, int status, const char *string); + +/** + * Check if the current request is beyond the configured max. number of redirects or subrequests + * @param r The current request + * @return true (is exceeded) or false + */ +AP_DECLARE(int) ap_is_recursion_limit_exceeded(const request_rec *r); + +/** + * Check for a definition from the server command line + * @param name The define to check for + * @return 1 if defined, 0 otherwise + */ +AP_DECLARE(int) ap_exists_config_define(const char *name); +/* FIXME! See STATUS about how */ +AP_DECLARE_NONSTD(int) ap_core_translate(request_rec *r); + +/* Authentication stuff. This is one of the places where compatibility + * with the old config files *really* hurts; they don't discriminate at + * all between different authentication schemes, meaning that we need + * to maintain common state for all of them in the core, and make it + * available to the other modules through interfaces. + */ + +/** @see require_line */ +typedef struct require_line require_line; + +/** + * @brief A structure to keep track of authorization requirements +*/ +struct require_line { + /** Where the require line is in the config file. */ + apr_int64_t method_mask; + /** The complete string from the command line */ + char *requirement; +}; + +/** + * Return the type of authorization required for this request + * @param r The current request + * @return The authorization required + */ +AP_DECLARE(const char *) ap_auth_type(request_rec *r); + +/** + * Return the current Authorization realm + * @param r The current request + * @return The current authorization realm + */ +AP_DECLARE(const char *) ap_auth_name(request_rec *r); + +/** + * How the requires lines must be met. + * @param r The current request + * @return How the requirements must be met. One of: + * <pre> + * SATISFY_ANY -- any of the requirements must be met. + * SATISFY_ALL -- all of the requirements must be met. + * SATISFY_NOSPEC -- There are no applicable satisfy lines + * </pre> + */ +AP_DECLARE(int) ap_satisfies(request_rec *r); + +/** + * Core is also unlike other modules in being implemented in more than + * one file... so, data structures are declared here, even though most of + * the code that cares really is in http_core.c. Also, another accessor. + */ +AP_DECLARE_DATA extern module core_module; + +/** + * Accessor for core_module's specific data. Equivalent to + * ap_get_module_config(cv, &core_module) but more efficient. + * @param cv The vector in which the modules configuration is stored. + * usually r->per_dir_config or s->module_config + * @return The module-specific data + */ +AP_DECLARE(void *) ap_get_core_module_config(const ap_conf_vector_t *cv); + +/** + * Accessor to set core_module's specific data. Equivalent to + * ap_set_module_config(cv, &core_module, val) but more efficient. + * @param cv The vector in which the modules configuration is stored. + * usually r->per_dir_config or s->module_config + * @param val The module-specific data to set + */ +AP_DECLARE(void) ap_set_core_module_config(ap_conf_vector_t *cv, void *val); + +/** Get the socket from the core network filter. This should be used instead of + * accessing the core connection config directly. + * @param c The connection record + * @return The socket + */ +AP_DECLARE(apr_socket_t *) ap_get_conn_socket(conn_rec *c); + +#ifndef AP_DEBUG +#define AP_CORE_MODULE_INDEX 0 +#define ap_get_core_module_config(v) \ + (((void **)(v))[AP_CORE_MODULE_INDEX]) +#define ap_set_core_module_config(v, val) \ + ((((void **)(v))[AP_CORE_MODULE_INDEX]) = (val)) +#else +#define AP_CORE_MODULE_INDEX (AP_DEBUG_ASSERT(core_module.module_index == 0), 0) +#endif + +/** + * @brief Per-request configuration +*/ +typedef struct { + /** bucket brigade used by getline for look-ahead and + * ap_get_client_block for holding left-over request body */ + struct apr_bucket_brigade *bb; + + /** an array of per-request working data elements, accessed + * by ID using ap_get_request_note() + * (Use ap_register_request_note() during initialization + * to add elements) + */ + void **notes; + + /** Custom response strings registered via ap_custom_response(), + * or NULL; check per-dir config if nothing found here + */ + char **response_code_strings; /* from ap_custom_response(), not from + * ErrorDocument + */ + + /** per-request document root of the server. This allows mass vhosting + * modules better compatibility with some scripts. Normally the + * context_* info should be used instead */ + const char *document_root; + + /* + * more fine-grained context information which is set by modules like + * mod_alias and mod_userdir + */ + /** the context root directory on disk for the current resource, + * without trailing slash + */ + const char *context_document_root; + /** the URI prefix that corresponds to the context_document_root directory, + * without trailing slash + */ + const char *context_prefix; + + /** There is a script processor installed on the output filter chain, + * so it needs the default_handler to deliver a (script) file into + * the chain so it can process it. Normally, default_handler only + * serves files on a GET request (assuming the file is actual content), + * since other methods are not content-retrieval. This flag overrides + * that behavior, stating that the "content" is actually a script and + * won't actually be delivered as the response for the non-GET method. + */ + int deliver_script; + + /** Should addition of charset= be suppressed for this request? + */ + int suppress_charset; +} core_request_config; + +/* Standard entries that are guaranteed to be accessible via + * ap_get_request_note() for each request (additional entries + * can be added with ap_register_request_note()) + */ +#define AP_NOTE_DIRECTORY_WALK 0 +#define AP_NOTE_LOCATION_WALK 1 +#define AP_NOTE_FILE_WALK 2 +#define AP_NOTE_IF_WALK 3 +#define AP_NUM_STD_NOTES 4 + +/** + * Reserve an element in the core_request_config->notes array + * for some application-specific data + * @return An integer key that can be passed to ap_get_request_note() + * during request processing to access this element for the + * current request. + */ +AP_DECLARE(apr_size_t) ap_register_request_note(void); + +/** + * Retrieve a pointer to an element in the core_request_config->notes array + * @param r The request + * @param note_num A key for the element: either a value obtained from + * ap_register_request_note() or one of the predefined AP_NOTE_* + * values. + * @return NULL if the note_num is invalid, otherwise a pointer to the + * requested note element. + * @remark At the start of a request, each note element is NULL. The + * handle provided by ap_get_request_note() is a pointer-to-pointer + * so that the caller can point the element to some app-specific + * data structure. The caller should guarantee that any such + * structure will last as long as the request itself. + */ +AP_DECLARE(void **) ap_get_request_note(request_rec *r, apr_size_t note_num); + + +typedef unsigned char allow_options_t; +typedef unsigned int overrides_t; + +/* + * Bits of info that go into making an ETag for a file + * document. Why a long? Because char historically + * proved too short for Options, and int can be different + * sizes on different platforms. + */ +typedef unsigned long etag_components_t; + +#define ETAG_UNSET 0 +#define ETAG_NONE (1 << 0) +#define ETAG_MTIME (1 << 1) +#define ETAG_INODE (1 << 2) +#define ETAG_SIZE (1 << 3) +#define ETAG_ALL (ETAG_MTIME | ETAG_INODE | ETAG_SIZE) +/* This is the default value used */ +#define ETAG_BACKWARD (ETAG_MTIME | ETAG_SIZE) + +/* Generic ON/OFF/UNSET for unsigned int foo :2 */ +#define AP_CORE_CONFIG_OFF (0) +#define AP_CORE_CONFIG_ON (1) +#define AP_CORE_CONFIG_UNSET (2) + +/* Generic merge of flag */ +#define AP_CORE_MERGE_FLAG(field, to, base, over) to->field = \ + over->field != AP_CORE_CONFIG_UNSET \ + ? over->field \ + : base->field + +/** + * @brief Server Signature Enumeration + */ +typedef enum { + srv_sig_unset, + srv_sig_off, + srv_sig_on, + srv_sig_withmail +} server_signature_e; + +/** + * @brief Per-directory configuration + */ +typedef struct { + /** path of the directory/regex/etc. see also d_is_fnmatch/absolute below */ + char *d; + /** the number of slashes in d */ + unsigned d_components; + + /** If (opts & OPT_UNSET) then no absolute assignment to options has + * been made. + * invariant: (opts_add & opts_remove) == 0 + * Which said another way means that the last relative (options + or -) + * assignment made to each bit is recorded in exactly one of opts_add + * or opts_remove. + */ + allow_options_t opts; + allow_options_t opts_add; + allow_options_t opts_remove; + overrides_t override; + allow_options_t override_opts; + + /* Used to be the custom response config. No longer used. */ + char **response_code_strings; /* from ErrorDocument, not from + * ap_custom_response() */ + + /* Hostname resolution etc */ +#define HOSTNAME_LOOKUP_OFF 0 +#define HOSTNAME_LOOKUP_ON 1 +#define HOSTNAME_LOOKUP_DOUBLE 2 +#define HOSTNAME_LOOKUP_UNSET 3 + unsigned int hostname_lookups : 4; + + unsigned int content_md5 : 2; /* calculate Content-MD5? */ + +#define USE_CANONICAL_NAME_OFF (0) +#define USE_CANONICAL_NAME_ON (1) +#define USE_CANONICAL_NAME_DNS (2) +#define USE_CANONICAL_NAME_UNSET (3) + unsigned use_canonical_name : 2; + + /* since is_fnmatch(conf->d) was being called so frequently in + * directory_walk() and its relatives, this field was created and + * is set to the result of that call. + */ + unsigned d_is_fnmatch : 1; + + /* should we force a charset on any outgoing parameterless content-type? + * if so, which charset? + */ +#define ADD_DEFAULT_CHARSET_OFF (0) +#define ADD_DEFAULT_CHARSET_ON (1) +#define ADD_DEFAULT_CHARSET_UNSET (2) + unsigned add_default_charset : 2; + const char *add_default_charset_name; + + /* System Resource Control */ +#ifdef RLIMIT_CPU + struct rlimit *limit_cpu; +#endif +#if defined (RLIMIT_DATA) || defined (RLIMIT_VMEM) || defined(RLIMIT_AS) + struct rlimit *limit_mem; +#endif +#ifdef RLIMIT_NPROC + struct rlimit *limit_nproc; +#endif + apr_off_t limit_req_body; /* limit on bytes in request msg body */ + long limit_xml_body; /* limit on bytes in XML request msg body */ + + /* logging options */ + + server_signature_e server_signature; + + /* Access control */ + apr_array_header_t *sec_file; + apr_array_header_t *sec_if; + ap_regex_t *r; + + const char *mime_type; /* forced with ForceType */ + const char *handler; /* forced by something other than SetHandler */ + const char *output_filters; /* forced with SetOutputFilters */ + const char *input_filters; /* forced with SetInputFilters */ + int accept_path_info; /* forced with AcceptPathInfo */ + + /* + * What attributes/data should be included in ETag generation? + */ + etag_components_t etag_bits; + etag_components_t etag_add; + etag_components_t etag_remove; + + /* + * Run-time performance tuning + */ +#define ENABLE_MMAP_OFF (0) +#define ENABLE_MMAP_ON (1) +#define ENABLE_MMAP_UNSET (2) + unsigned int enable_mmap : 2; /* whether files in this dir can be mmap'ed */ + +#define ENABLE_SENDFILE_OFF (0) +#define ENABLE_SENDFILE_ON (1) +#define ENABLE_SENDFILE_UNSET (2) + unsigned int enable_sendfile : 2; /* files in this dir can be sendfile'ed */ + +#define USE_CANONICAL_PHYS_PORT_OFF (0) +#define USE_CANONICAL_PHYS_PORT_ON (1) +#define USE_CANONICAL_PHYS_PORT_UNSET (2) + unsigned int use_canonical_phys_port : 2; + + unsigned int allow_encoded_slashes : 1; /* URLs may contain %2f w/o being + * pitched indiscriminately */ + unsigned int decode_encoded_slashes : 1; /* whether to decode encoded slashes in URLs */ + +#define AP_CONDITION_IF 1 +#define AP_CONDITION_ELSE 2 +#define AP_CONDITION_ELSEIF (AP_CONDITION_ELSE|AP_CONDITION_IF) + unsigned int condition_ifelse : 2; /* is this an <If>, <ElseIf>, or <Else> */ + + ap_expr_info_t *condition; /* Conditionally merge <If> sections */ + + /** per-dir log config */ + struct ap_logconf *log; + + /** Table of directives allowed per AllowOverrideList */ + apr_table_t *override_list; + +#define AP_MAXRANGES_UNSET -1 +#define AP_MAXRANGES_DEFAULT -2 +#define AP_MAXRANGES_UNLIMITED -3 +#define AP_MAXRANGES_NORANGES 0 + /** Number of Ranges before returning HTTP_OK. **/ + int max_ranges; + /** Max number of Range overlaps (merges) allowed **/ + int max_overlaps; + /** Max number of Range reversals (eg: 200-300, 100-125) allowed **/ + int max_reversals; + + /** Named back references */ + apr_array_header_t *refs; + + /** Custom response config with expression support. The hash table + * contains compiled expressions keyed against the custom response + * code. + */ + apr_hash_t *response_code_exprs; + +#define AP_CGI_PASS_AUTH_OFF (0) +#define AP_CGI_PASS_AUTH_ON (1) +#define AP_CGI_PASS_AUTH_UNSET (2) + /** CGIPassAuth: Whether HTTP authorization headers will be passed to + * scripts as CGI variables; affects all modules calling + * ap_add_common_vars(), as well as any others using this field as + * advice + */ + unsigned int cgi_pass_auth : 2; + unsigned int qualify_redirect_url :2; + ap_expr_info_t *expr_handler; /* forced with SetHandler */ + + /** Table of rules for building CGI variables, NULL if none configured */ + apr_hash_t *cgi_var_rules; +} core_dir_config; + +/* macro to implement off by default behaviour */ +#define AP_SENDFILE_ENABLED(x) \ + ((x) == ENABLE_SENDFILE_ON ? APR_SENDFILE_ENABLED : 0) + +/* Per-server core configuration */ + +typedef struct { + + char *gprof_dir; + + /* Name translations --- we want the core to be able to do *something* + * so it's at least a minimally functional web server on its own (and + * can be tested that way). But let's keep it to the bare minimum: + */ + const char *ap_document_root; + + /* Access control */ + + char *access_name; + apr_array_header_t *sec_dir; + apr_array_header_t *sec_url; + + /* recursion backstopper */ + int redirect_limit; /* maximum number of internal redirects */ + int subreq_limit; /* maximum nesting level of subrequests */ + + const char *protocol; + apr_table_t *accf_map; + + /* array of ap_errorlog_format_item for error log format string */ + apr_array_header_t *error_log_format; + /* + * two arrays of arrays of ap_errorlog_format_item for additional information + * logged to the error log once per connection/request + */ + apr_array_header_t *error_log_conn; + apr_array_header_t *error_log_req; + + /* TRACE control */ +#define AP_TRACE_UNSET -1 +#define AP_TRACE_DISABLE 0 +#define AP_TRACE_ENABLE 1 +#define AP_TRACE_EXTENDED 2 + int trace_enable; +#define AP_MERGE_TRAILERS_UNSET 0 +#define AP_MERGE_TRAILERS_ENABLE 1 +#define AP_MERGE_TRAILERS_DISABLE 2 + int merge_trailers; + + apr_array_header_t *protocols; + int protocols_honor_order; + +#define AP_HTTP09_UNSET 0 +#define AP_HTTP09_ENABLE 1 +#define AP_HTTP09_DISABLE 2 + char http09_enable; + +#define AP_HTTP_CONFORMANCE_UNSET 0 +#define AP_HTTP_CONFORMANCE_UNSAFE 1 +#define AP_HTTP_CONFORMANCE_STRICT 2 + char http_conformance; + +#define AP_HTTP_METHODS_UNSET 0 +#define AP_HTTP_METHODS_LENIENT 1 +#define AP_HTTP_METHODS_REGISTERED 2 + char http_methods; + +} core_server_config; + +/* for AddOutputFiltersByType in core.c */ +void ap_add_output_filters_by_type(request_rec *r); + +/* for http_config.c */ +void ap_core_reorder_directories(apr_pool_t *, server_rec *); + +/* for mod_perl */ +AP_CORE_DECLARE(void) ap_add_per_dir_conf(server_rec *s, void *dir_config); +AP_CORE_DECLARE(void) ap_add_per_url_conf(server_rec *s, void *url_config); +AP_CORE_DECLARE(void) ap_add_file_conf(apr_pool_t *p, core_dir_config *conf, void *url_config); +AP_CORE_DECLARE(const char *) ap_add_if_conf(apr_pool_t *p, core_dir_config *conf, void *url_config); +AP_CORE_DECLARE_NONSTD(const char *) ap_limit_section(cmd_parms *cmd, void *dummy, const char *arg); + +/* Core filters; not exported. */ +apr_status_t ap_core_input_filter(ap_filter_t *f, apr_bucket_brigade *b, + ap_input_mode_t mode, apr_read_type_e block, + apr_off_t readbytes); +apr_status_t ap_core_output_filter(ap_filter_t *f, apr_bucket_brigade *b); + + +AP_DECLARE(const char*) ap_get_server_protocol(server_rec* s); +AP_DECLARE(void) ap_set_server_protocol(server_rec* s, const char* proto); + +typedef struct core_output_filter_ctx core_output_filter_ctx_t; +typedef struct core_filter_ctx core_ctx_t; + +typedef struct core_net_rec { + /** Connection to the client */ + apr_socket_t *client_socket; + + /** connection record */ + conn_rec *c; + + core_output_filter_ctx_t *out_ctx; + core_ctx_t *in_ctx; +} core_net_rec; + +/** + * Insert the network bucket into the core input filter's input brigade. + * This hook is intended for MPMs or protocol modules that need to do special + * socket setup. + * @param c The connection + * @param bb The brigade to insert the bucket into + * @param socket The socket to put into a bucket + * @return AP_DECLINED if the current function does not handle this connection, + * APR_SUCCESS or an error otherwise. + */ +AP_DECLARE_HOOK(apr_status_t, insert_network_bucket, + (conn_rec *c, apr_bucket_brigade *bb, apr_socket_t *socket)) + +/* ---------------------------------------------------------------------- + * + * Runtime status/management + */ + +typedef enum { + ap_mgmt_type_string, + ap_mgmt_type_long, + ap_mgmt_type_hash +} ap_mgmt_type_e; + +typedef union { + const char *s_value; + long i_value; + apr_hash_t *h_value; +} ap_mgmt_value; + +typedef struct { + const char *description; + const char *name; + ap_mgmt_type_e vtype; + ap_mgmt_value v; +} ap_mgmt_item_t; + +/* Handles for core filters */ +AP_DECLARE_DATA extern ap_filter_rec_t *ap_subreq_core_filter_handle; +AP_DECLARE_DATA extern ap_filter_rec_t *ap_core_output_filter_handle; +AP_DECLARE_DATA extern ap_filter_rec_t *ap_content_length_filter_handle; +AP_DECLARE_DATA extern ap_filter_rec_t *ap_core_input_filter_handle; + +/** + * This hook provdes a way for modules to provide metrics/statistics about + * their operational status. + * + * @param p A pool to use to create entries in the hash table + * @param val The name of the parameter(s) that is wanted. This is + * tree-structured would be in the form ('*' is all the tree, + * 'module.*' all of the module , 'module.foo.*', or + * 'module.foo.bar' ) + * @param ht The hash table to store the results. Keys are item names, and + * the values point to ap_mgmt_item_t structures. + * @ingroup hooks + */ +AP_DECLARE_HOOK(int, get_mgmt_items, + (apr_pool_t *p, const char * val, apr_hash_t *ht)) + +/* ---------------------------------------------------------------------- */ + +/* ---------------------------------------------------------------------- + * + * I/O logging with mod_logio + */ + +APR_DECLARE_OPTIONAL_FN(void, ap_logio_add_bytes_out, + (conn_rec *c, apr_off_t bytes)); + +APR_DECLARE_OPTIONAL_FN(void, ap_logio_add_bytes_in, + (conn_rec *c, apr_off_t bytes)); + +APR_DECLARE_OPTIONAL_FN(apr_off_t, ap_logio_get_last_bytes, (conn_rec *c)); + +/* ---------------------------------------------------------------------- + * + * Error log formats + */ + +/** + * The info structure passed to callback functions of errorlog handlers. + * Not all information is available in all contexts. In particular, all + * pointers may be NULL. + */ +typedef struct ap_errorlog_info { + /** current server_rec. + * Should be preferred over c->base_server and r->server + */ + const server_rec *s; + + /** current conn_rec. + * Should be preferred over r->connection + */ + const conn_rec *c; + + /** current request_rec. */ + const request_rec *r; + /** r->main if r is a subrequest, otherwise equal to r */ + const request_rec *rmain; + + /** pool passed to ap_log_perror, NULL otherwise */ + apr_pool_t *pool; + + /** name of source file where the log message was produced, NULL if N/A. */ + const char *file; + /** line number in the source file, 0 if N/A */ + int line; + + /** module index of module that produced the log message, APLOG_NO_MODULE if N/A. */ + int module_index; + /** log level of error message (flags like APLOG_STARTUP have been removed), -1 if N/A */ + int level; + + /** apr error status related to the log message, 0 if no error */ + apr_status_t status; + + /** 1 if logging to syslog, 0 otherwise */ + int using_syslog; + /** 1 if APLOG_STARTUP was set for the log message, 0 otherwise */ + int startup; + + /** message format */ + const char *format; +} ap_errorlog_info; + +/** + * callback function prototype for a external errorlog handler + * @note To avoid unbounded memory usage, these functions must not allocate + * memory from the server, connection, or request pools. If an errorlog + * handler absolutely needs a pool to pass to other functions, it must create + * and destroy a sub-pool. + */ +typedef int ap_errorlog_handler_fn_t(const ap_errorlog_info *info, + const char *arg, char *buf, int buflen); + +/** + * Register external errorlog handler + * @param p config pool to use + * @param tag the new format specifier (i.e. the letter after the %) + * @param handler the handler function + * @param flags flags (reserved, set to 0) + */ +AP_DECLARE(void) ap_register_errorlog_handler(apr_pool_t *p, char *tag, + ap_errorlog_handler_fn_t *handler, + int flags); + +typedef struct ap_errorlog_handler { + ap_errorlog_handler_fn_t *func; + int flags; /* for future extensions */ +} ap_errorlog_handler; + + /** item starts a new field */ +#define AP_ERRORLOG_FLAG_FIELD_SEP 1 + /** item is the actual error message */ +#define AP_ERRORLOG_FLAG_MESSAGE 2 + /** skip whole line if item is zero-length */ +#define AP_ERRORLOG_FLAG_REQUIRED 4 + /** log zero-length item as '-' */ +#define AP_ERRORLOG_FLAG_NULL_AS_HYPHEN 8 + +typedef struct { + /** ap_errorlog_handler function */ + ap_errorlog_handler_fn_t *func; + /** argument passed to item in {} */ + const char *arg; + /** a combination of the AP_ERRORLOG_* flags */ + unsigned int flags; + /** only log item if the message's log level is higher than this */ + unsigned int min_loglevel; +} ap_errorlog_format_item; + +/** + * hook method to log error messages + * @ingroup hooks + * @param info pointer to ap_errorlog_info struct which contains all + * the details + * @param errstr the (unformatted) message to log + * @warning Allocating from the usual pools (pool, info->c->pool, info->p->pool) + * must be avoided because it can cause memory leaks. + * Use a subpool if necessary. + */ +AP_DECLARE_HOOK(void, error_log, (const ap_errorlog_info *info, + const char *errstr)) + +AP_CORE_DECLARE(void) ap_register_log_hooks(apr_pool_t *p); +AP_CORE_DECLARE(void) ap_register_config_hooks(apr_pool_t *p); + +/* ---------------------------------------------------------------------- + * + * ident lookups with mod_ident + */ + +APR_DECLARE_OPTIONAL_FN(const char *, ap_ident_lookup, + (request_rec *r)); + +/* ---------------------------------------------------------------------- + * + * authorization values with mod_authz_core + */ + +APR_DECLARE_OPTIONAL_FN(int, authz_some_auth_required, (request_rec *r)); +APR_DECLARE_OPTIONAL_FN(const char *, authn_ap_auth_type, (request_rec *r)); +APR_DECLARE_OPTIONAL_FN(const char *, authn_ap_auth_name, (request_rec *r)); + +/* ---------------------------------------------------------------------- + * + * authorization values with mod_access_compat + */ + +APR_DECLARE_OPTIONAL_FN(int, access_compat_ap_satisfies, (request_rec *r)); + +/* ---------------------------------------------------------------------- */ + +/** Query the server for some state information + * @param query_code Which information is requested + * @return the requested state information + */ +AP_DECLARE(int) ap_state_query(int query_code); + +/* + * possible values for query_code in ap_state_query() + */ + + /** current status of the server */ +#define AP_SQ_MAIN_STATE 0 + /** are we going to serve requests or are we just testing/dumping config */ +#define AP_SQ_RUN_MODE 1 + /** generation of the top-level apache parent */ +#define AP_SQ_CONFIG_GEN 2 + +/* + * return values for ap_state_query() + */ + + /** return value for unknown query_code */ +#define AP_SQ_NOT_SUPPORTED -1 + +/* values returned for AP_SQ_MAIN_STATE */ + /** before the config preflight */ +#define AP_SQ_MS_INITIAL_STARTUP 1 + /** initial configuration run for setting up log config, etc. */ +#define AP_SQ_MS_CREATE_PRE_CONFIG 2 + /** tearing down configuration */ +#define AP_SQ_MS_DESTROY_CONFIG 3 + /** normal configuration run */ +#define AP_SQ_MS_CREATE_CONFIG 4 + /** running the MPM */ +#define AP_SQ_MS_RUN_MPM 5 + /** cleaning up for exit */ +#define AP_SQ_MS_EXITING 6 + +/* values returned for AP_SQ_RUN_MODE */ + /** command line not yet parsed */ +#define AP_SQ_RM_UNKNOWN 1 + /** normal operation (server requests or signal server) */ +#define AP_SQ_RM_NORMAL 2 + /** config test only */ +#define AP_SQ_RM_CONFIG_TEST 3 + /** only dump some parts of the config */ +#define AP_SQ_RM_CONFIG_DUMP 4 + +#ifdef __cplusplus +} +#endif + +#endif /* !APACHE_HTTP_CORE_H */ +/** @} */ |