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Diffstat (limited to 'include/httpd.h')
| -rw-r--r-- | include/httpd.h | 2668 |
1 files changed, 2668 insertions, 0 deletions
diff --git a/include/httpd.h b/include/httpd.h new file mode 100644 index 0000000..799cf97 --- /dev/null +++ b/include/httpd.h @@ -0,0 +1,2668 @@ +/* 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 httpd.h + * @brief HTTP Daemon routines + * + * @defgroup APACHE Apache HTTP Server + * + * Top level group of which all other groups are a member + * @{ + * + * @defgroup APACHE_MODS Loadable modules + * Top level group for modules + * @defgroup APACHE_OS Operating System Specific + * @defgroup APACHE_INTERNAL Internal interfaces + * @defgroup APACHE_CORE Core routines + * @{ + * @defgroup APACHE_CORE_DAEMON HTTP Daemon Routine + * @{ + */ + +#ifndef APACHE_HTTPD_H +#define APACHE_HTTPD_H + +/* XXX - We need to push more stuff to other .h files, or even .c files, to + * make this file smaller + */ + +/* Headers in which EVERYONE has an interest... */ +#include "ap_config.h" +#include "ap_mmn.h" + +#include "ap_release.h" + +#include "apr.h" +#include "apr_version.h" +#include "apr_general.h" +#include "apr_tables.h" +#include "apr_pools.h" +#include "apr_time.h" +#include "apr_network_io.h" +#include "apr_buckets.h" +#include "apr_poll.h" +#include "apr_thread_proc.h" + +#include "os.h" + +#include "ap_regex.h" + +#if APR_HAVE_STDLIB_H +#include <stdlib.h> +#endif + +/* Note: apr_uri.h is also included, see below */ + +#ifdef __cplusplus +extern "C" { +#endif + +/* ----------------------------- config dir ------------------------------ */ + +/** Define this to be the default server home dir. Most things later in this + * file with a relative pathname will have this added. + */ +#ifndef HTTPD_ROOT +#ifdef OS2 +/** Set default for OS/2 file system */ +#define HTTPD_ROOT "/os2httpd" +#elif defined(WIN32) +/** Set default for Windows file system */ +#define HTTPD_ROOT "/apache" +#elif defined (NETWARE) +/** Set the default for NetWare */ +#define HTTPD_ROOT "/apache" +#else +/** Set for all other OSs */ +#define HTTPD_ROOT "/usr/local/apache" +#endif +#endif /* HTTPD_ROOT */ + +/* + * --------- You shouldn't have to edit anything below this line ---------- + * + * Any modifications to any defaults not defined above should be done in the + * respective configuration file. + * + */ + +/** + * Default location of documents. Can be overridden by the DocumentRoot + * directive. + */ +#ifndef DOCUMENT_LOCATION +#ifdef OS2 +/* Set default for OS/2 file system */ +#define DOCUMENT_LOCATION HTTPD_ROOT "/docs" +#else +/* Set default for non OS/2 file system */ +#define DOCUMENT_LOCATION HTTPD_ROOT "/htdocs" +#endif +#endif /* DOCUMENT_LOCATION */ + +/** Maximum number of dynamically loaded modules */ +#ifndef DYNAMIC_MODULE_LIMIT +#define DYNAMIC_MODULE_LIMIT 256 +#endif + +/** Default administrator's address */ +#define DEFAULT_ADMIN "[no address given]" + +/** The name of the log files */ +#ifndef DEFAULT_ERRORLOG +#if defined(OS2) || defined(WIN32) +#define DEFAULT_ERRORLOG "logs/error.log" +#else +#define DEFAULT_ERRORLOG "logs/error_log" +#endif +#endif /* DEFAULT_ERRORLOG */ + +/** Define this to be what your per-directory security files are called */ +#ifndef DEFAULT_ACCESS_FNAME +#ifdef OS2 +/* Set default for OS/2 file system */ +#define DEFAULT_ACCESS_FNAME "htaccess" +#else +#define DEFAULT_ACCESS_FNAME ".htaccess" +#endif +#endif /* DEFAULT_ACCESS_FNAME */ + +/** The name of the server config file */ +#ifndef SERVER_CONFIG_FILE +#define SERVER_CONFIG_FILE "conf/httpd.conf" +#endif + +/** The default path for CGI scripts if none is currently set */ +#ifndef DEFAULT_PATH +#define DEFAULT_PATH "/bin:/usr/bin:/usr/ucb:/usr/bsd:/usr/local/bin" +#endif + +/** The path to the suExec wrapper, can be overridden in Configuration */ +#ifndef SUEXEC_BIN +#define SUEXEC_BIN HTTPD_ROOT "/bin/suexec" +#endif + +/** The timeout for waiting for messages */ +#ifndef DEFAULT_TIMEOUT +#define DEFAULT_TIMEOUT 60 +#endif + +/** The timeout for waiting for keepalive timeout until next request */ +#ifndef DEFAULT_KEEPALIVE_TIMEOUT +#define DEFAULT_KEEPALIVE_TIMEOUT 5 +#endif + +/** The number of requests to entertain per connection */ +#ifndef DEFAULT_KEEPALIVE +#define DEFAULT_KEEPALIVE 100 +#endif + +/* + * Limits on the size of various request items. These limits primarily + * exist to prevent simple denial-of-service attacks on a server based + * on misuse of the protocol. The recommended values will depend on the + * nature of the server resources -- CGI scripts and database backends + * might require large values, but most servers could get by with much + * smaller limits than we use below. The request message body size can + * be limited by the per-dir config directive LimitRequestBody. + * + * Internal buffer sizes are two bytes more than the DEFAULT_LIMIT_REQUEST_LINE + * and DEFAULT_LIMIT_REQUEST_FIELDSIZE below, which explains the 8190. + * These two limits can be lowered or raised by the server config + * directives LimitRequestLine and LimitRequestFieldsize, respectively. + * + * DEFAULT_LIMIT_REQUEST_FIELDS can be modified or disabled (set = 0) by + * the server config directive LimitRequestFields. + */ + +/** default limit on bytes in Request-Line (Method+URI+HTTP-version) */ +#ifndef DEFAULT_LIMIT_REQUEST_LINE +#define DEFAULT_LIMIT_REQUEST_LINE 8190 +#endif +/** default limit on bytes in any one header field */ +#ifndef DEFAULT_LIMIT_REQUEST_FIELDSIZE +#define DEFAULT_LIMIT_REQUEST_FIELDSIZE 8190 +#endif +/** default limit on number of request header fields */ +#ifndef DEFAULT_LIMIT_REQUEST_FIELDS +#define DEFAULT_LIMIT_REQUEST_FIELDS 100 +#endif +/** default/hard limit on number of leading/trailing empty lines */ +#ifndef DEFAULT_LIMIT_BLANK_LINES +#define DEFAULT_LIMIT_BLANK_LINES 10 +#endif + +/** + * The default default character set name to add if AddDefaultCharset is + * enabled. Overridden with AddDefaultCharsetName. + */ +#define DEFAULT_ADD_DEFAULT_CHARSET_NAME "iso-8859-1" + +/** default HTTP Server protocol */ +#define AP_SERVER_PROTOCOL "HTTP/1.1" + + +/* ------------------ stuff that modules are allowed to look at ----------- */ + +/** Define this to be what your HTML directory content files are called */ +#ifndef AP_DEFAULT_INDEX +#define AP_DEFAULT_INDEX "index.html" +#endif + +/** The name of the MIME types file */ +#ifndef AP_TYPES_CONFIG_FILE +#define AP_TYPES_CONFIG_FILE "conf/mime.types" +#endif + +/* + * Define the HTML doctype strings centrally. + */ +/** HTML 2.0 Doctype */ +#define DOCTYPE_HTML_2_0 "<!DOCTYPE HTML PUBLIC \"-//IETF//" \ + "DTD HTML 2.0//EN\">\n" +/** HTML 3.2 Doctype */ +#define DOCTYPE_HTML_3_2 "<!DOCTYPE HTML PUBLIC \"-//W3C//" \ + "DTD HTML 3.2 Final//EN\">\n" +/** HTML 4.0 Strict Doctype */ +#define DOCTYPE_HTML_4_0S "<!DOCTYPE HTML PUBLIC \"-//W3C//" \ + "DTD HTML 4.0//EN\"\n" \ + "\"http://www.w3.org/TR/REC-html40/strict.dtd\">\n" +/** HTML 4.0 Transitional Doctype */ +#define DOCTYPE_HTML_4_0T "<!DOCTYPE HTML PUBLIC \"-//W3C//" \ + "DTD HTML 4.0 Transitional//EN\"\n" \ + "\"http://www.w3.org/TR/REC-html40/loose.dtd\">\n" +/** HTML 4.0 Frameset Doctype */ +#define DOCTYPE_HTML_4_0F "<!DOCTYPE HTML PUBLIC \"-//W3C//" \ + "DTD HTML 4.0 Frameset//EN\"\n" \ + "\"http://www.w3.org/TR/REC-html40/frameset.dtd\">\n" +/** XHTML 1.0 Strict Doctype */ +#define DOCTYPE_XHTML_1_0S "<!DOCTYPE html PUBLIC \"-//W3C//" \ + "DTD XHTML 1.0 Strict//EN\"\n" \ + "\"http://www.w3.org/TR/xhtml1/DTD/" \ + "xhtml1-strict.dtd\">\n" +/** XHTML 1.0 Transitional Doctype */ +#define DOCTYPE_XHTML_1_0T "<!DOCTYPE html PUBLIC \"-//W3C//" \ + "DTD XHTML 1.0 Transitional//EN\"\n" \ + "\"http://www.w3.org/TR/xhtml1/DTD/" \ + "xhtml1-transitional.dtd\">\n" +/** XHTML 1.0 Frameset Doctype */ +#define DOCTYPE_XHTML_1_0F "<!DOCTYPE html PUBLIC \"-//W3C//" \ + "DTD XHTML 1.0 Frameset//EN\"\n" \ + "\"http://www.w3.org/TR/xhtml1/DTD/" \ + "xhtml1-frameset.dtd\">" + +/** Internal representation for a HTTP protocol number, e.g., HTTP/1.1 */ +#define HTTP_VERSION(major,minor) (1000*(major)+(minor)) +/** Major part of HTTP protocol */ +#define HTTP_VERSION_MAJOR(number) ((number)/1000) +/** Minor part of HTTP protocol */ +#define HTTP_VERSION_MINOR(number) ((number)%1000) + +/* -------------- Port number for server running standalone --------------- */ + +/** default HTTP Port */ +#define DEFAULT_HTTP_PORT 80 +/** default HTTPS Port */ +#define DEFAULT_HTTPS_PORT 443 +/** + * Check whether @a port is the default port for the request @a r. + * @param port The port number + * @param r The request + * @see #ap_default_port + */ +#define ap_is_default_port(port,r) ((port) == ap_default_port(r)) +/** + * Get the default port for a request (which depends on the scheme). + * @param r The request + */ +#define ap_default_port(r) ap_run_default_port(r) +/** + * Get the scheme for a request. + * @param r The request + */ +#define ap_http_scheme(r) ap_run_http_scheme(r) + +/** The default string length */ +#define MAX_STRING_LEN HUGE_STRING_LEN + +/** The length of a Huge string */ +#define HUGE_STRING_LEN 8192 + +/** The size of the server's internal read-write buffers */ +#define AP_IOBUFSIZE 8192 + +/** The max number of regex captures that can be expanded by ap_pregsub */ +#define AP_MAX_REG_MATCH 10 + +/** + * APR_HAS_LARGE_FILES introduces the problem of splitting sendfile into + * multiple buckets, no greater than MAX(apr_size_t), and more granular + * than that in case the brigade code/filters attempt to read it directly. + * ### 16mb is an invention, no idea if it is reasonable. + */ +#define AP_MAX_SENDFILE 16777216 /* 2^24 */ + +/** + * MPM child process exit status values + * The MPM parent process may check the status to see if special + * error handling is required. + */ +/** a normal exit */ +#define APEXIT_OK 0x0 +/** A fatal error arising during the server's init sequence */ +#define APEXIT_INIT 0x2 +/** The child died during its init sequence */ +#define APEXIT_CHILDINIT 0x3 +/** + * The child exited due to a resource shortage. + * The parent should limit the rate of forking until + * the situation is resolved. + */ +#define APEXIT_CHILDSICK 0x7 +/** + * A fatal error, resulting in the whole server aborting. + * If a child exits with this error, the parent process + * considers this a server-wide fatal error and aborts. + */ +#define APEXIT_CHILDFATAL 0xf + +#ifndef AP_DECLARE +/** + * Stuff marked #AP_DECLARE is part of the API, and intended for use + * by modules. Its purpose is to allow us to add attributes that + * particular platforms or compilers require to every exported function. + */ +# define AP_DECLARE(type) type +#endif + +#ifndef AP_DECLARE_NONSTD +/** + * Stuff marked #AP_DECLARE_NONSTD is part of the API, and intended for + * use by modules. The difference between #AP_DECLARE and + * #AP_DECLARE_NONSTD is that the latter is required for any functions + * which use varargs or are used via indirect function call. This + * is to accommodate the two calling conventions in windows dlls. + */ +# define AP_DECLARE_NONSTD(type) type +#endif +#ifndef AP_DECLARE_DATA +# define AP_DECLARE_DATA +#endif + +#ifndef AP_MODULE_DECLARE +# define AP_MODULE_DECLARE(type) type +#endif +#ifndef AP_MODULE_DECLARE_NONSTD +# define AP_MODULE_DECLARE_NONSTD(type) type +#endif +#ifndef AP_MODULE_DECLARE_DATA +# define AP_MODULE_DECLARE_DATA +#endif + +/** + * @internal + * modules should not use functions marked AP_CORE_DECLARE + */ +#ifndef AP_CORE_DECLARE +# define AP_CORE_DECLARE AP_DECLARE +#endif + +/** + * @internal + * modules should not use functions marked AP_CORE_DECLARE_NONSTD + */ + +#ifndef AP_CORE_DECLARE_NONSTD +# define AP_CORE_DECLARE_NONSTD AP_DECLARE_NONSTD +#endif + +/** + * @defgroup APACHE_APR_STATUS_T HTTPD specific values of apr_status_t + * @{ + */ +#define AP_START_USERERR (APR_OS_START_USERERR + 2000) +#define AP_USERERR_LEN 1000 + +/** The function declines to handle the request */ +#define AP_DECLINED (AP_START_USERERR + 0) + +/** @} */ + +/** + * @brief The numeric version information is broken out into fields within this + * structure. + */ +typedef struct { + int major; /**< major number */ + int minor; /**< minor number */ + int patch; /**< patch number */ + const char *add_string; /**< additional string like "-dev" */ +} ap_version_t; + +/** + * Return httpd's version information in a numeric form. + * + * @param version Pointer to a version structure for returning the version + * information. + */ +AP_DECLARE(void) ap_get_server_revision(ap_version_t *version); + +/** + * Get the server banner in a form suitable for sending over the + * network, with the level of information controlled by the + * ServerTokens directive. + * @return The server banner + */ +AP_DECLARE(const char *) ap_get_server_banner(void); + +/** + * Get the server description in a form suitable for local displays, + * status reports, or logging. This includes the detailed server + * version and information about some modules. It is not affected + * by the ServerTokens directive. + * @return The server description + */ +AP_DECLARE(const char *) ap_get_server_description(void); + +/** + * Add a component to the server description and banner strings + * @param pconf The pool to allocate the component from + * @param component The string to add + */ +AP_DECLARE(void) ap_add_version_component(apr_pool_t *pconf, const char *component); + +/** + * Get the date a time that the server was built + * @return The server build time string + */ +AP_DECLARE(const char *) ap_get_server_built(void); + +/* non-HTTP status codes returned by hooks */ + +#define OK 0 /**< Module has handled this stage. */ +#define DECLINED -1 /**< Module declines to handle */ +#define DONE -2 /**< Module has served the response completely + * - it's safe to die() with no more output + */ +#define SUSPENDED -3 /**< Module will handle the remainder of the request. + * The core will never invoke the request again, */ + +/** Returned by the bottom-most filter if no data was written. + * @see ap_pass_brigade(). */ +#define AP_NOBODY_WROTE -100 +/** Returned by the bottom-most filter if no data was read. + * @see ap_get_brigade(). */ +#define AP_NOBODY_READ -101 +/** Returned by any filter if the filter chain encounters an error + * and has already dealt with the error response. + */ +#define AP_FILTER_ERROR -102 + +/** + * @defgroup HTTP_Status HTTP Status Codes + * @{ + */ +/** + * The size of the static status_lines array in http_protocol.c for + * storing all of the potential response status-lines (a sparse table). + * When adding a new code here add it to status_lines as well. + * A future version should dynamically generate the apr_table_t at startup. + */ +#define RESPONSE_CODES 103 + +#define HTTP_CONTINUE 100 +#define HTTP_SWITCHING_PROTOCOLS 101 +#define HTTP_PROCESSING 102 +#define HTTP_OK 200 +#define HTTP_CREATED 201 +#define HTTP_ACCEPTED 202 +#define HTTP_NON_AUTHORITATIVE 203 +#define HTTP_NO_CONTENT 204 +#define HTTP_RESET_CONTENT 205 +#define HTTP_PARTIAL_CONTENT 206 +#define HTTP_MULTI_STATUS 207 +#define HTTP_ALREADY_REPORTED 208 +#define HTTP_IM_USED 226 +#define HTTP_MULTIPLE_CHOICES 300 +#define HTTP_MOVED_PERMANENTLY 301 +#define HTTP_MOVED_TEMPORARILY 302 +#define HTTP_SEE_OTHER 303 +#define HTTP_NOT_MODIFIED 304 +#define HTTP_USE_PROXY 305 +#define HTTP_TEMPORARY_REDIRECT 307 +#define HTTP_PERMANENT_REDIRECT 308 +#define HTTP_BAD_REQUEST 400 +#define HTTP_UNAUTHORIZED 401 +#define HTTP_PAYMENT_REQUIRED 402 +#define HTTP_FORBIDDEN 403 +#define HTTP_NOT_FOUND 404 +#define HTTP_METHOD_NOT_ALLOWED 405 +#define HTTP_NOT_ACCEPTABLE 406 +#define HTTP_PROXY_AUTHENTICATION_REQUIRED 407 +#define HTTP_REQUEST_TIME_OUT 408 +#define HTTP_CONFLICT 409 +#define HTTP_GONE 410 +#define HTTP_LENGTH_REQUIRED 411 +#define HTTP_PRECONDITION_FAILED 412 +#define HTTP_REQUEST_ENTITY_TOO_LARGE 413 +#define HTTP_REQUEST_URI_TOO_LARGE 414 +#define HTTP_UNSUPPORTED_MEDIA_TYPE 415 +#define HTTP_RANGE_NOT_SATISFIABLE 416 +#define HTTP_EXPECTATION_FAILED 417 +#define HTTP_MISDIRECTED_REQUEST 421 +#define HTTP_UNPROCESSABLE_ENTITY 422 +#define HTTP_LOCKED 423 +#define HTTP_FAILED_DEPENDENCY 424 +#define HTTP_UPGRADE_REQUIRED 426 +#define HTTP_PRECONDITION_REQUIRED 428 +#define HTTP_TOO_MANY_REQUESTS 429 +#define HTTP_REQUEST_HEADER_FIELDS_TOO_LARGE 431 +#define HTTP_UNAVAILABLE_FOR_LEGAL_REASONS 451 +#define HTTP_INTERNAL_SERVER_ERROR 500 +#define HTTP_NOT_IMPLEMENTED 501 +#define HTTP_BAD_GATEWAY 502 +#define HTTP_SERVICE_UNAVAILABLE 503 +#define HTTP_GATEWAY_TIME_OUT 504 +#define HTTP_VERSION_NOT_SUPPORTED 505 +#define HTTP_VARIANT_ALSO_VARIES 506 +#define HTTP_INSUFFICIENT_STORAGE 507 +#define HTTP_LOOP_DETECTED 508 +#define HTTP_NOT_EXTENDED 510 +#define HTTP_NETWORK_AUTHENTICATION_REQUIRED 511 + +/** is the status code informational */ +#define ap_is_HTTP_INFO(x) (((x) >= 100)&&((x) < 200)) +/** is the status code OK ?*/ +#define ap_is_HTTP_SUCCESS(x) (((x) >= 200)&&((x) < 300)) +/** is the status code a redirect */ +#define ap_is_HTTP_REDIRECT(x) (((x) >= 300)&&((x) < 400)) +/** is the status code a error (client or server) */ +#define ap_is_HTTP_ERROR(x) (((x) >= 400)&&((x) < 600)) +/** is the status code a client error */ +#define ap_is_HTTP_CLIENT_ERROR(x) (((x) >= 400)&&((x) < 500)) +/** is the status code a server error */ +#define ap_is_HTTP_SERVER_ERROR(x) (((x) >= 500)&&((x) < 600)) +/** is the status code a (potentially) valid response code? */ +#define ap_is_HTTP_VALID_RESPONSE(x) (((x) >= 100)&&((x) < 600)) + +/** should the status code drop the connection */ +#define ap_status_drops_connection(x) \ + (((x) == HTTP_BAD_REQUEST) || \ + ((x) == HTTP_REQUEST_TIME_OUT) || \ + ((x) == HTTP_LENGTH_REQUIRED) || \ + ((x) == HTTP_REQUEST_ENTITY_TOO_LARGE) || \ + ((x) == HTTP_REQUEST_URI_TOO_LARGE) || \ + ((x) == HTTP_INTERNAL_SERVER_ERROR) || \ + ((x) == HTTP_SERVICE_UNAVAILABLE) || \ + ((x) == HTTP_NOT_IMPLEMENTED)) + +/** does the status imply header only response (i.e. never w/ a body)? */ +#define AP_STATUS_IS_HEADER_ONLY(x) ((x) == HTTP_NO_CONTENT || \ + (x) == HTTP_NOT_MODIFIED) +/** @} */ + +/** + * @defgroup Methods List of Methods recognized by the server + * @ingroup APACHE_CORE_DAEMON + * @{ + * + * @brief Methods recognized (but not necessarily handled) by the server. + * + * These constants are used in bit shifting masks of size int, so it is + * unsafe to have more methods than bits in an int. HEAD == M_GET. + * This list must be tracked by the list in http_protocol.c in routine + * ap_method_name_of(). + * + */ + +#define M_GET 0 /** RFC 2616: HTTP */ +#define M_PUT 1 /* : */ +#define M_POST 2 +#define M_DELETE 3 +#define M_CONNECT 4 +#define M_OPTIONS 5 +#define M_TRACE 6 /** RFC 2616: HTTP */ +#define M_PATCH 7 /** RFC 5789: PATCH Method for HTTP */ +#define M_PROPFIND 8 /** RFC 2518: WebDAV */ +#define M_PROPPATCH 9 /* : */ +#define M_MKCOL 10 +#define M_COPY 11 +#define M_MOVE 12 +#define M_LOCK 13 +#define M_UNLOCK 14 /** RFC 2518: WebDAV */ +#define M_VERSION_CONTROL 15 /** RFC 3253: WebDAV Versioning */ +#define M_CHECKOUT 16 /* : */ +#define M_UNCHECKOUT 17 +#define M_CHECKIN 18 +#define M_UPDATE 19 +#define M_LABEL 20 +#define M_REPORT 21 +#define M_MKWORKSPACE 22 +#define M_MKACTIVITY 23 +#define M_BASELINE_CONTROL 24 +#define M_MERGE 25 +#define M_INVALID 26 /** no valid method */ + +/** + * METHODS needs to be equal to the number of bits + * we are using for limit masks. + */ +#define METHODS 64 + +/** + * The method mask bit to shift for anding with a bitmask. + */ +#define AP_METHOD_BIT ((apr_int64_t)1) +/** @} */ + + +/** @see ap_method_list_t */ +typedef struct ap_method_list_t ap_method_list_t; + +/** + * @struct ap_method_list_t + * @brief Structure for handling HTTP methods. + * + * Methods known to the server are accessed via a bitmask shortcut; + * extension methods are handled by an array. + */ +struct ap_method_list_t { + /** The bitmask used for known methods */ + apr_int64_t method_mask; + /** the array used for extension methods */ + apr_array_header_t *method_list; +}; +/** @} */ + +/** + * @defgroup bnotes Binary notes recognized by the server + * @ingroup APACHE_CORE_DAEMON + * @{ + * + * @brief Binary notes recognized by the server. + */ + +/** + * The type used for request binary notes. + */ +typedef apr_uint64_t ap_request_bnotes_t; + +/** + * These constants represent bitmasks for notes associated with this + * request. There are space for 64 bits in the apr_uint64_t. + * + */ +#define AP_REQUEST_STRONG_ETAG 1 >> 0 + +/** + * This is a convenience macro to ease with getting specific request + * binary notes. + */ +#define AP_REQUEST_GET_BNOTE(r, mask) \ + ((mask) & ((r)->bnotes)) + +/** + * This is a convenience macro to ease with setting specific request + * binary notes. + */ +#define AP_REQUEST_SET_BNOTE(r, mask, val) \ + (r)->bnotes = (((r)->bnotes & ~(mask)) | (val)) + +/** + * Returns true if the strong etag flag is set for this request. + */ +#define AP_REQUEST_IS_STRONG_ETAG(r) \ + AP_REQUEST_GET_BNOTE((r), AP_REQUEST_STRONG_ETAG) +/** @} */ + + +/** + * @defgroup module_magic Module Magic mime types + * @{ + */ +/** Magic for mod_cgi[d] */ +#define CGI_MAGIC_TYPE "application/x-httpd-cgi" +/** Magic for mod_include */ +#define INCLUDES_MAGIC_TYPE "text/x-server-parsed-html" +/** Magic for mod_include */ +#define INCLUDES_MAGIC_TYPE3 "text/x-server-parsed-html3" +/** Magic for mod_dir */ +#define DIR_MAGIC_TYPE "httpd/unix-directory" +/** Default for r->handler if no content-type set by type_checker */ +#define AP_DEFAULT_HANDLER_NAME "" +#define AP_IS_DEFAULT_HANDLER_NAME(x) (*x == '\0') + +/** @} */ +/* Just in case your linefeed isn't the one the other end is expecting. */ +#if !APR_CHARSET_EBCDIC +/** linefeed */ +#define LF 10 +/** carriage return */ +#define CR 13 +/** carriage return /Line Feed Combo */ +#define CRLF "\015\012" +#else /* APR_CHARSET_EBCDIC */ +/* For platforms using the EBCDIC charset, the transition ASCII->EBCDIC is done + * in the buff package (bread/bputs/bwrite). Everywhere else, we use + * "native EBCDIC" CR and NL characters. These are therefore + * defined as + * '\r' and '\n'. + */ +#define CR '\r' +#define LF '\n' +#define CRLF "\r\n" +#endif /* APR_CHARSET_EBCDIC */ +/** Useful for common code with either platform charset. */ +#define CRLF_ASCII "\015\012" + +/** + * @defgroup values_request_rec_body Possible values for request_rec.read_body + * @{ + * Possible values for request_rec.read_body (set by handling module): + */ + +/** Send 413 error if message has any body */ +#define REQUEST_NO_BODY 0 +/** Send 411 error if body without Content-Length */ +#define REQUEST_CHUNKED_ERROR 1 +/** If chunked, remove the chunks for me. */ +#define REQUEST_CHUNKED_DECHUNK 2 +/** @} // values_request_rec_body */ + +/** + * @defgroup values_request_rec_used_path_info Possible values for request_rec.used_path_info + * @ingroup APACHE_CORE_DAEMON + * @{ + * Possible values for request_rec.used_path_info: + */ + +/** Accept the path_info from the request */ +#define AP_REQ_ACCEPT_PATH_INFO 0 +/** Return a 404 error if path_info was given */ +#define AP_REQ_REJECT_PATH_INFO 1 +/** Module may chose to use the given path_info */ +#define AP_REQ_DEFAULT_PATH_INFO 2 + +/** @} // values_request_rec_used_path_info */ + + +/* + * Things which may vary per file-lookup WITHIN a request --- + * e.g., state of MIME config. Basically, the name of an object, info + * about the object, and any other info we may have which may need to + * change as we go poking around looking for it (e.g., overridden by + * .htaccess files). + * + * Note how the default state of almost all these things is properly + * zero, so that allocating it with pcalloc does the right thing without + * a whole lot of hairy initialization... so long as we are willing to + * make the (fairly) portable assumption that the bit pattern of a NULL + * pointer is, in fact, zero. + */ + +/** + * @brief This represents the result of calling htaccess; these are cached for + * each request. + */ +struct htaccess_result { + /** the directory to which this applies */ + const char *dir; + /** the overrides allowed for the .htaccess file */ + int override; + /** the override options allowed for the .htaccess file */ + int override_opts; + /** Table of allowed directives for override */ + apr_table_t *override_list; + /** the configuration directives */ + struct ap_conf_vector_t *htaccess; + /** the next one, or NULL if no more; N.B. never change this */ + const struct htaccess_result *next; +}; + +/* The following four types define a hierarchy of activities, so that + * given a request_rec r you can write r->connection->server->process + * to get to the process_rec. While this reduces substantially the + * number of arguments that various hooks require beware that in + * threaded versions of the server you must consider multiplexing + * issues. */ + + +/** A structure that represents one process */ +typedef struct process_rec process_rec; +/** A structure that represents a virtual server */ +typedef struct server_rec server_rec; +/** A structure that represents one connection */ +typedef struct conn_rec conn_rec; +/** A structure that represents the current request */ +typedef struct request_rec request_rec; +/** A structure that represents the status of the current connection */ +typedef struct conn_state_t conn_state_t; + +/* ### would be nice to not include this from httpd.h ... */ +/* This comes after we have defined the request_rec type */ +#include "apr_uri.h" + +/** + * @brief A structure that represents one process + */ +struct process_rec { + /** Global pool. Cleared upon normal exit */ + apr_pool_t *pool; + /** Configuration pool. Cleared upon restart */ + apr_pool_t *pconf; + /** The program name used to execute the program */ + const char *short_name; + /** The command line arguments */ + const char * const *argv; + /** Number of command line arguments passed to the program */ + int argc; +}; + +/** + * @brief A structure that represents the current request + */ +struct request_rec { + /** The pool associated with the request */ + apr_pool_t *pool; + /** The connection to the client */ + conn_rec *connection; + /** The virtual host for this request */ + server_rec *server; + + /** Pointer to the redirected request if this is an external redirect */ + request_rec *next; + /** Pointer to the previous request if this is an internal redirect */ + request_rec *prev; + + /** Pointer to the main request if this is a sub-request + * (see http_request.h) */ + request_rec *main; + + /* Info about the request itself... we begin with stuff that only + * protocol.c should ever touch... + */ + /** First line of request */ + char *the_request; + /** HTTP/0.9, "simple" request (e.g. GET /foo\n w/no headers) */ + int assbackwards; + /** A proxy request (calculated during post_read_request/translate_name) + * possible values PROXYREQ_NONE, PROXYREQ_PROXY, PROXYREQ_REVERSE, + * PROXYREQ_RESPONSE + */ + int proxyreq; + /** HEAD request, as opposed to GET */ + int header_only; + /** Protocol version number of protocol; 1.1 = 1001 */ + int proto_num; + /** Protocol string, as given to us, or HTTP/0.9 */ + char *protocol; + /** Host, as set by full URI or Host: header. + * For literal IPv6 addresses, this does NOT include the surrounding [ ] + */ + const char *hostname; + + /** Time when the request started */ + apr_time_t request_time; + + /** Status line, if set by script */ + const char *status_line; + /** Status line */ + int status; + + /* Request method, two ways; also, protocol, etc.. Outside of protocol.c, + * look, but don't touch. + */ + + /** M_GET, M_POST, etc. */ + int method_number; + /** Request method (eg. GET, HEAD, POST, etc.) */ + const char *method; + + /** + * 'allowed' is a bitvector of the allowed methods. + * + * A handler must ensure that the request method is one that + * it is capable of handling. Generally modules should DECLINE + * any request methods they do not handle. Prior to aborting the + * handler like this the handler should set r->allowed to the list + * of methods that it is willing to handle. This bitvector is used + * to construct the "Allow:" header required for OPTIONS requests, + * and HTTP_METHOD_NOT_ALLOWED and HTTP_NOT_IMPLEMENTED status codes. + * + * Since the default_handler deals with OPTIONS, all modules can + * usually decline to deal with OPTIONS. TRACE is always allowed, + * modules don't need to set it explicitly. + * + * Since the default_handler will always handle a GET, a + * module which does *not* implement GET should probably return + * HTTP_METHOD_NOT_ALLOWED. Unfortunately this means that a Script GET + * handler can't be installed by mod_actions. + */ + apr_int64_t allowed; + /** Array of extension methods */ + apr_array_header_t *allowed_xmethods; + /** List of allowed methods */ + ap_method_list_t *allowed_methods; + + /** byte count in stream is for body */ + apr_off_t sent_bodyct; + /** body byte count, for easy access */ + apr_off_t bytes_sent; + /** Last modified time of the requested resource */ + apr_time_t mtime; + + /* HTTP/1.1 connection-level features */ + + /** The Range: header */ + const char *range; + /** The "real" content length */ + apr_off_t clength; + /** sending chunked transfer-coding */ + int chunked; + + /** Method for reading the request body + * (eg. REQUEST_CHUNKED_ERROR, REQUEST_NO_BODY, + * REQUEST_CHUNKED_DECHUNK, etc...) */ + int read_body; + /** reading chunked transfer-coding */ + int read_chunked; + /** is client waiting for a 100 response? */ + unsigned expecting_100; + /** The optional kept body of the request. */ + apr_bucket_brigade *kept_body; + /** For ap_body_to_table(): parsed body */ + /* XXX: ap_body_to_table has been removed. Remove body_table too or + * XXX: keep it to reintroduce ap_body_to_table without major bump? */ + apr_table_t *body_table; + /** Remaining bytes left to read from the request body */ + apr_off_t remaining; + /** Number of bytes that have been read from the request body */ + apr_off_t read_length; + + /* MIME header environments, in and out. Also, an array containing + * environment variables to be passed to subprocesses, so people can + * write modules to add to that environment. + * + * The difference between headers_out and err_headers_out is that the + * latter are printed even on error, and persist across internal redirects + * (so the headers printed for ErrorDocument handlers will have them). + * + * The 'notes' apr_table_t is for notes from one module to another, with no + * other set purpose in mind... + */ + + /** MIME header environment from the request */ + apr_table_t *headers_in; + /** MIME header environment for the response */ + apr_table_t *headers_out; + /** MIME header environment for the response, printed even on errors and + * persist across internal redirects */ + apr_table_t *err_headers_out; + /** Array of environment variables to be used for sub processes */ + apr_table_t *subprocess_env; + /** Notes from one module to another */ + apr_table_t *notes; + + /* content_type, handler, content_encoding, and all content_languages + * MUST be lowercased strings. They may be pointers to static strings; + * they should not be modified in place. + */ + /** The content-type for the current request */ + const char *content_type; /* Break these out --- we dispatch on 'em */ + /** The handler string that we use to call a handler function */ + const char *handler; /* What we *really* dispatch on */ + + /** How to encode the data */ + const char *content_encoding; + /** Array of strings representing the content languages */ + apr_array_header_t *content_languages; + + /** variant list validator (if negotiated) */ + char *vlist_validator; + + /** If an authentication check was made, this gets set to the user name. */ + char *user; + /** If an authentication check was made, this gets set to the auth type. */ + char *ap_auth_type; + + /* What object is being requested (either directly, or via include + * or content-negotiation mapping). + */ + + /** The URI without any parsing performed */ + char *unparsed_uri; + /** The path portion of the URI, or "/" if no path provided */ + char *uri; + /** The filename on disk corresponding to this response */ + char *filename; + /** The true filename stored in the filesystem, as in the true alpha case + * and alias correction, e.g. "Image.jpeg" not "IMAGE$1.JPE" on Windows. + * The core map_to_storage canonicalizes r->filename when they mismatch */ + char *canonical_filename; + /** The PATH_INFO extracted from this request */ + char *path_info; + /** The QUERY_ARGS extracted from this request */ + char *args; + + /** + * Flag for the handler to accept or reject path_info on + * the current request. All modules should respect the + * AP_REQ_ACCEPT_PATH_INFO and AP_REQ_REJECT_PATH_INFO + * values, while AP_REQ_DEFAULT_PATH_INFO indicates they + * may follow existing conventions. This is set to the + * user's preference upon HOOK_VERY_FIRST of the fixups. + */ + int used_path_info; + + /** A flag to determine if the eos bucket has been sent yet */ + int eos_sent; + + /* Various other config info which may change with .htaccess files + * These are config vectors, with one void* pointer for each module + * (the thing pointed to being the module's business). + */ + + /** Options set in config files, etc. */ + struct ap_conf_vector_t *per_dir_config; + /** Notes on *this* request */ + struct ap_conf_vector_t *request_config; + + /** Optional request log level configuration. Will usually point + * to a server or per_dir config, i.e. must be copied before + * modifying */ + const struct ap_logconf *log; + + /** Id to identify request in access and error log. Set when the first + * error log entry for this request is generated. + */ + const char *log_id; + + /** + * A linked list of the .htaccess configuration directives + * accessed by this request. + * N.B. always add to the head of the list, _never_ to the end. + * that way, a sub request's list can (temporarily) point to a parent's list + */ + const struct htaccess_result *htaccess; + + /** A list of output filters to be used for this request */ + struct ap_filter_t *output_filters; + /** A list of input filters to be used for this request */ + struct ap_filter_t *input_filters; + + /** A list of protocol level output filters to be used for this + * request */ + struct ap_filter_t *proto_output_filters; + /** A list of protocol level input filters to be used for this + * request */ + struct ap_filter_t *proto_input_filters; + + /** This response can not be cached */ + int no_cache; + /** There is no local copy of this response */ + int no_local_copy; + + /** Mutex protect callbacks registered with ap_mpm_register_timed_callback + * from being run before the original handler finishes running + */ + apr_thread_mutex_t *invoke_mtx; + + /** A struct containing the components of URI */ + apr_uri_t parsed_uri; + /** finfo.protection (st_mode) set to zero if no such file */ + apr_finfo_t finfo; + + /** remote address information from conn_rec, can be overridden if + * necessary by a module. + * This is the address that originated the request. + */ + apr_sockaddr_t *useragent_addr; + char *useragent_ip; + + /** MIME trailer environment from the request */ + apr_table_t *trailers_in; + /** MIME trailer environment from the response */ + apr_table_t *trailers_out; + + /** Originator's DNS name, if known. NULL if DNS hasn't been checked, + * "" if it has and no address was found. N.B. Only access this though + * ap_get_useragent_host() */ + char *useragent_host; + /** have we done double-reverse DNS? -1 yes/failure, 0 not yet, + * 1 yes/success + */ + int double_reverse; + /** Request flags associated with this request. Use + * AP_REQUEST_GET_FLAGS() and AP_REQUEST_SET_FLAGS() to access + * the elements of this field. + */ + ap_request_bnotes_t bnotes; +}; + +/** + * @defgroup ProxyReq Proxy request types + * + * Possible values of request_rec->proxyreq. A request could be normal, + * proxied or reverse proxied. Normally proxied and reverse proxied are + * grouped together as just "proxied", but sometimes it's necessary to + * tell the difference between the two, such as for authentication. + * @{ + */ + +#define PROXYREQ_NONE 0 /**< No proxy */ +#define PROXYREQ_PROXY 1 /**< Standard proxy */ +#define PROXYREQ_REVERSE 2 /**< Reverse proxy */ +#define PROXYREQ_RESPONSE 3 /**< Origin response */ + +/* @} */ + +/** + * @brief Enumeration of connection keepalive options + */ +typedef enum { + AP_CONN_UNKNOWN, + AP_CONN_CLOSE, + AP_CONN_KEEPALIVE +} ap_conn_keepalive_e; + +/** + * @brief Structure to store things which are per connection + */ +struct conn_rec { + /** Pool associated with this connection */ + apr_pool_t *pool; + /** Physical vhost this conn came in on */ + server_rec *base_server; + /** used by http_vhost.c */ + void *vhost_lookup_data; + + /* Information about the connection itself */ + /** local address */ + apr_sockaddr_t *local_addr; + /** remote address; this is the end-point of the next hop, for the address + * of the request creator, see useragent_addr in request_rec + */ + apr_sockaddr_t *client_addr; + + /** Client's IP address; this is the end-point of the next hop, for the + * IP of the request creator, see useragent_ip in request_rec + */ + char *client_ip; + /** Client's DNS name, if known. NULL if DNS hasn't been checked, + * "" if it has and no address was found. N.B. Only access this though + * get_remote_host() */ + char *remote_host; + /** Only ever set if doing rfc1413 lookups. N.B. Only access this through + * get_remote_logname() */ + char *remote_logname; + + /** server IP address */ + char *local_ip; + /** used for ap_get_server_name when UseCanonicalName is set to DNS + * (ignores setting of HostnameLookups) */ + char *local_host; + + /** ID of this connection; unique at any point in time */ + long id; + /** Config vector containing pointers to connections per-server + * config structures. */ + struct ap_conf_vector_t *conn_config; + /** Notes on *this* connection: send note from one module to + * another. must remain valid for all requests on this conn */ + apr_table_t *notes; + /** A list of input filters to be used for this connection */ + struct ap_filter_t *input_filters; + /** A list of output filters to be used for this connection */ + struct ap_filter_t *output_filters; + /** handle to scoreboard information for this connection */ + void *sbh; + /** The bucket allocator to use for all bucket/brigade creations */ + struct apr_bucket_alloc_t *bucket_alloc; + /** The current state of this connection; may be NULL if not used by MPM */ + conn_state_t *cs; + /** Is there data pending in the input filters? */ + int data_in_input_filters; + /** Is there data pending in the output filters? */ + int data_in_output_filters; + + /** Are there any filters that clogg/buffer the input stream, breaking + * the event mpm. + */ + unsigned int clogging_input_filters:1; + + /** have we done double-reverse DNS? -1 yes/failure, 0 not yet, + * 1 yes/success */ + signed int double_reverse:2; + + /** Are we still talking? */ + unsigned aborted; + + /** Are we going to keep the connection alive for another request? + * @see ap_conn_keepalive_e */ + ap_conn_keepalive_e keepalive; + + /** How many times have we used it? */ + int keepalives; + + /** Optional connection log level configuration. May point to a server or + * per_dir config, i.e. must be copied before modifying */ + const struct ap_logconf *log; + + /** Id to identify this connection in error log. Set when the first + * error log entry for this connection is generated. + */ + const char *log_id; + + + /** This points to the current thread being used to process this request, + * over the lifetime of a request, the value may change. Users of the connection + * record should not rely upon it staying the same between calls that involve + * the MPM. + */ +#if APR_HAS_THREADS + apr_thread_t *current_thread; +#endif + + /** The "real" master connection. NULL if I am the master. */ + conn_rec *master; + + int outgoing; +}; + +/** + * Enumeration of connection states + * The two states CONN_STATE_LINGER_NORMAL and CONN_STATE_LINGER_SHORT may + * only be set by the MPM. Use CONN_STATE_LINGER outside of the MPM. + */ +typedef enum { + CONN_STATE_CHECK_REQUEST_LINE_READABLE, + CONN_STATE_READ_REQUEST_LINE, + CONN_STATE_HANDLER, + CONN_STATE_WRITE_COMPLETION, + CONN_STATE_SUSPENDED, + CONN_STATE_LINGER, /* connection may be closed with lingering */ + CONN_STATE_LINGER_NORMAL, /* MPM has started lingering close with normal timeout */ + CONN_STATE_LINGER_SHORT, /* MPM has started lingering close with short timeout */ + + CONN_STATE_NUM /* Number of states (keep/kept last) */ +} conn_state_e; + +typedef enum { + CONN_SENSE_DEFAULT, + CONN_SENSE_WANT_READ, /* next event must be read */ + CONN_SENSE_WANT_WRITE /* next event must be write */ +} conn_sense_e; + +/** + * @brief A structure to contain connection state information + */ +struct conn_state_t { + /** Current state of the connection */ + conn_state_e state; + /** Whether to read instead of write, or write instead of read */ + conn_sense_e sense; +}; + +/* Per-vhost config... */ + +/** + * The address 255.255.255.255, when used as a virtualhost address, + * will become the "default" server when the ip doesn't match other vhosts. + */ +#define DEFAULT_VHOST_ADDR 0xfffffffful + + +/** + * @struct server_addr_rec + * @brief A structure to be used for Per-vhost config + */ +typedef struct server_addr_rec server_addr_rec; +struct server_addr_rec { + /** The next server in the list */ + server_addr_rec *next; + /** The name given in "<VirtualHost>" */ + char *virthost; + /** The bound address, for this server */ + apr_sockaddr_t *host_addr; + /** The bound port, for this server */ + apr_port_t host_port; +}; + +struct ap_logconf { + /** The per-module log levels */ + signed char *module_levels; + + /** The log level for this server */ + int level; +}; +/** + * @brief A structure to store information for each virtual server + */ +struct server_rec { + /** The process this server is running in */ + process_rec *process; + /** The next server in the list */ + server_rec *next; + + /* Log files --- note that transfer log is now in the modules... */ + + /** The name of the error log */ + char *error_fname; + /** A file descriptor that references the error log */ + apr_file_t *error_log; + /** The log level configuration */ + struct ap_logconf log; + + /* Module-specific configuration for server, and defaults... */ + + /** Config vector containing pointers to modules' per-server config + * structures. */ + struct ap_conf_vector_t *module_config; + /** MIME type info, etc., before we start checking per-directory info */ + struct ap_conf_vector_t *lookup_defaults; + + /** The path to the config file that the server was defined in */ + const char *defn_name; + /** The line of the config file that the server was defined on */ + unsigned defn_line_number; + /** true if this is the virtual server */ + char is_virtual; + + + /* Information for redirects */ + + /** for redirects, etc. */ + apr_port_t port; + /** The server request scheme for redirect responses */ + const char *server_scheme; + + /* Contact information */ + + /** The admin's contact information */ + char *server_admin; + /** The server hostname */ + char *server_hostname; + + /* Transaction handling */ + + /** I haven't got a clue */ + server_addr_rec *addrs; + /** Timeout, as an apr interval, before we give up */ + apr_interval_time_t timeout; + /** The apr interval we will wait for another request */ + apr_interval_time_t keep_alive_timeout; + /** Maximum requests per connection */ + int keep_alive_max; + /** Use persistent connections? */ + int keep_alive; + + /** Normal names for ServerAlias servers */ + apr_array_header_t *names; + /** Wildcarded names for ServerAlias servers */ + apr_array_header_t *wild_names; + + /** Pathname for ServerPath */ + const char *path; + /** Length of path */ + int pathlen; + + /** limit on size of the HTTP request line */ + int limit_req_line; + /** limit on size of any request header field */ + int limit_req_fieldsize; + /** limit on number of request header fields */ + int limit_req_fields; + + /** Opaque storage location */ + void *context; + + /** Whether the keepalive timeout is explicit (1) or + * inherited (0) from the base server (either first + * server on the same IP:port or main server) */ + unsigned int keep_alive_timeout_set:1; +}; + +/** + * @struct ap_sload_t + * @brief A structure to hold server load params + */ +typedef struct ap_sload_t ap_sload_t; +struct ap_sload_t { + /* percentage of process/threads ready/idle (0->100)*/ + int idle; + /* percentage of process/threads busy (0->100) */ + int busy; + /* total bytes served */ + apr_off_t bytes_served; + /* total access count */ + unsigned long access_count; +}; + +/** + * @struct ap_loadavg_t + * @brief A structure to hold various server loadavg + */ +typedef struct ap_loadavg_t ap_loadavg_t; +struct ap_loadavg_t { + /* current loadavg, ala getloadavg() */ + float loadavg; + /* 5 min loadavg */ + float loadavg5; + /* 15 min loadavg */ + float loadavg15; +}; + +/** + * Get the context_document_root for a request. This is a generalization of + * the document root, which is too limited in the presence of mappers like + * mod_userdir and mod_alias. The context_document_root is the directory + * on disk that maps to the context_prefix URI prefix. + * @param r The request + * @note For resources that do not map to the file system or for very complex + * mappings, this information may still be wrong. + */ +AP_DECLARE(const char *) ap_context_document_root(request_rec *r); + +/** + * Get the context_prefix for a request. The context_prefix URI prefix + * maps to the context_document_root on disk. + * @param r The request + */ +AP_DECLARE(const char *) ap_context_prefix(request_rec *r); + +/** Set context_prefix and context_document_root for a request. + * @param r The request + * @param prefix the URI prefix, without trailing slash + * @param document_root the corresponding directory on disk, without trailing + * slash + * @note If one of prefix of document_root is NULL, the corrsponding + * property will not be changed. + */ +AP_DECLARE(void) ap_set_context_info(request_rec *r, const char *prefix, + const char *document_root); + +/** Set per-request document root. This is for mass virtual hosting modules + * that want to provide the correct DOCUMENT_ROOT value to scripts. + * @param r The request + * @param document_root the document root for the request. + */ +AP_DECLARE(void) ap_set_document_root(request_rec *r, const char *document_root); + +/** + * Examine a field value (such as a media-/content-type) string and return + * it sans any parameters; e.g., strip off any ';charset=foo' and the like. + * @param p Pool to allocate memory from + * @param intype The field to examine + * @return A copy of the field minus any parameters + */ +AP_DECLARE(char *) ap_field_noparam(apr_pool_t *p, const char *intype); + +/** + * Convert a time from an integer into a string in a specified format + * @param p The pool to allocate memory from + * @param t The time to convert + * @param fmt The format to use for the conversion + * @param gmt Convert the time for GMT? + * @return The string that represents the specified time + */ +AP_DECLARE(char *) ap_ht_time(apr_pool_t *p, apr_time_t t, const char *fmt, int gmt); + +/* String handling. The *_nc variants allow you to use non-const char **s as + arguments (unfortunately C won't automatically convert a char ** to a const + char **) */ + +/** + * Get the characters until the first occurrence of a specified character + * @param p The pool to allocate memory from + * @param line The string to get the characters from + * @param stop The character to stop at + * @return A copy of the characters up to the first stop character + */ +AP_DECLARE(char *) ap_getword(apr_pool_t *p, const char **line, char stop); + +/** + * Get the characters until the first occurrence of a specified character + * @param p The pool to allocate memory from + * @param line The string to get the characters from + * @param stop The character to stop at + * @return A copy of the characters up to the first stop character + * @note This is the same as ap_getword(), except it doesn't use const char **. + */ +AP_DECLARE(char *) ap_getword_nc(apr_pool_t *p, char **line, char stop); + +/** + * Get the first word from a given string. A word is defined as all characters + * up to the first whitespace. + * @param p The pool to allocate memory from + * @param line The string to traverse + * @return The first word in the line + */ +AP_DECLARE(char *) ap_getword_white(apr_pool_t *p, const char **line); + +/** + * Get the first word from a given string. A word is defined as all characters + * up to the first whitespace. + * @param p The pool to allocate memory from + * @param line The string to traverse + * @return The first word in the line + * @note The same as ap_getword_white(), except it doesn't use const char** + */ +AP_DECLARE(char *) ap_getword_white_nc(apr_pool_t *p, char **line); + +/** + * Get all characters from the first occurrence of @a stop to the first "\0" + * @param p The pool to allocate memory from + * @param line The line to traverse + * @param stop The character to start at + * @return A copy of all characters after the first occurrence of the specified + * character + */ +AP_DECLARE(char *) ap_getword_nulls(apr_pool_t *p, const char **line, + char stop); + +/** + * Get all characters from the first occurrence of @a stop to the first "\0" + * @param p The pool to allocate memory from + * @param line The line to traverse + * @param stop The character to start at + * @return A copy of all characters after the first occurrence of the specified + * character + * @note The same as ap_getword_nulls(), except it doesn't use const char **. + */ +AP_DECLARE(char *) ap_getword_nulls_nc(apr_pool_t *p, char **line, char stop); + +/** + * Get the second word in the string paying attention to quoting + * @param p The pool to allocate from + * @param line The line to traverse + * @return A copy of the string + */ +AP_DECLARE(char *) ap_getword_conf(apr_pool_t *p, const char **line); + +/** + * Get the second word in the string paying attention to quoting + * @param p The pool to allocate from + * @param line The line to traverse + * @return A copy of the string + * @note The same as ap_getword_conf(), except it doesn't use const char **. + */ +AP_DECLARE(char *) ap_getword_conf_nc(apr_pool_t *p, char **line); + +/** + * Get the second word in the string paying attention to quoting, + * with {...} supported as well as "..." and '...' + * @param p The pool to allocate from + * @param line The line to traverse + * @return A copy of the string + */ +AP_DECLARE(char *) ap_getword_conf2(apr_pool_t *p, const char **line); + +/** + * Get the second word in the string paying attention to quoting, + * with {...} supported as well as "..." and '...' + * @param p The pool to allocate from + * @param line The line to traverse + * @return A copy of the string + * @note The same as ap_getword_conf2(), except it doesn't use const char **. + */ +AP_DECLARE(char *) ap_getword_conf2_nc(apr_pool_t *p, char **line); + +/** + * Check a string for any config define or environment variable construct + * and replace each of them by the value of that variable, if it exists. + * The default syntax of the constructs is ${ENV} but can be changed by + * setting the define::* config defines. If the variable does not exist, + * leave the ${ENV} construct alone but print a warning. + * @param p The pool to allocate from + * @param word The string to check + * @return The string with the replaced environment variables + */ +AP_DECLARE(const char *) ap_resolve_env(apr_pool_t *p, const char * word); + +/** + * Size an HTTP header field list item, as separated by a comma. + * @param field The field to size + * @param len The length of the field + * @return The return value is a pointer to the beginning of the non-empty + * list item within the original string (or NULL if there is none) and the + * address of field is shifted to the next non-comma, non-whitespace + * character. len is the length of the item excluding any beginning whitespace. + */ +AP_DECLARE(const char *) ap_size_list_item(const char **field, int *len); + +/** + * Retrieve an HTTP header field list item, as separated by a comma, + * while stripping insignificant whitespace and lowercasing anything not in + * a quoted string or comment. + * @param p The pool to allocate from + * @param field The field to retrieve + * @return The return value is a new string containing the converted list + * item (or NULL if none) and the address pointed to by field is + * shifted to the next non-comma, non-whitespace. + */ +AP_DECLARE(char *) ap_get_list_item(apr_pool_t *p, const char **field); + +/** + * Find an item in canonical form (lowercase, no extra spaces) within + * an HTTP field value list. + * @param p The pool to allocate from + * @param line The field value list to search + * @param tok The token to search for + * @return 1 if found, 0 if not found. + */ +AP_DECLARE(int) ap_find_list_item(apr_pool_t *p, const char *line, const char *tok); + +/** + * Do a weak ETag comparison within an HTTP field value list. + * @param p The pool to allocate from + * @param line The field value list to search + * @param tok The token to search for + * @return 1 if found, 0 if not found. + */ +AP_DECLARE(int) ap_find_etag_weak(apr_pool_t *p, const char *line, const char *tok); + +/** + * Do a strong ETag comparison within an HTTP field value list. + * @param p The pool to allocate from + * @param line The field value list to search + * @param tok The token to search for + * @return 1 if found, 0 if not found. + */ +AP_DECLARE(int) ap_find_etag_strong(apr_pool_t *p, const char *line, const char *tok); + +/* Scan a string for field content chars, as defined by RFC7230 section 3.2 + * including VCHAR/obs-text, as well as HT and SP + * @param ptr The string to scan + * @return A pointer to the first (non-HT) ASCII ctrl character. + * @note lws and trailing whitespace are scanned, the caller is responsible + * for trimming leading and trailing whitespace + */ +AP_DECLARE(const char *) ap_scan_http_field_content(const char *ptr); + +/* Scan a string for token characters, as defined by RFC7230 section 3.2.6 + * @param ptr The string to scan + * @return A pointer to the first non-token character. + */ +AP_DECLARE(const char *) ap_scan_http_token(const char *ptr); + +/* Scan a string for visible ASCII (0x21-0x7E) or obstext (0x80+) + * and return a pointer to the first SP/CTL/NUL character encountered. + * @param ptr The string to scan + * @return A pointer to the first SP/CTL character. + */ +AP_DECLARE(const char *) ap_scan_vchar_obstext(const char *ptr); + +/** + * Retrieve an array of tokens in the format "1#token" defined in RFC2616. Only + * accepts ',' as a delimiter, does not accept quoted strings, and errors on + * any separator. + * @param p The pool to allocate from + * @param tok The line to read tokens from + * @param tokens Pointer to an array of tokens. If not NULL, must be an array + * of char*, otherwise it will be allocated on @a p when a token is found + * @param skip_invalid If true, when an invalid separator is encountered, it + * will be ignored. + * @return NULL on success, an error string otherwise. + * @remark *tokens may be NULL on output if NULL in input and no token is found + */ +AP_DECLARE(const char *) ap_parse_token_list_strict(apr_pool_t *p, const char *tok, + apr_array_header_t **tokens, + int skip_invalid); + +/** + * Retrieve a token, spacing over it and adjusting the pointer to + * the first non-white byte afterwards. Note that these tokens + * are delimited by semis and commas and can also be delimited + * by whitespace at the caller's option. + * @param p The pool to allocate from + * @param accept_line The line to retrieve the token from (adjusted afterwards) + * @param accept_white Is it delimited by whitespace + * @return the token + */ +AP_DECLARE(char *) ap_get_token(apr_pool_t *p, const char **accept_line, int accept_white); + +/** + * Find http tokens, see the definition of token from RFC2068 + * @param p The pool to allocate from + * @param line The line to find the token + * @param tok The token to find + * @return 1 if the token is found, 0 otherwise + */ +AP_DECLARE(int) ap_find_token(apr_pool_t *p, const char *line, const char *tok); + +/** + * find http tokens from the end of the line + * @param p The pool to allocate from + * @param line The line to find the token + * @param tok The token to find + * @return 1 if the token is found, 0 otherwise + */ +AP_DECLARE(int) ap_find_last_token(apr_pool_t *p, const char *line, const char *tok); + +/** + * Check for an Absolute URI syntax + * @param u The string to check + * @return 1 if URI, 0 otherwise + */ +AP_DECLARE(int) ap_is_url(const char *u); + +/** + * Unescape a string + * @param url The string to unescape + * @return 0 on success, non-zero otherwise + */ +AP_DECLARE(int) ap_unescape_all(char *url); + +/** + * Unescape a URL + * @param url The url to unescape + * @return 0 on success, non-zero otherwise + */ +AP_DECLARE(int) ap_unescape_url(char *url); + +/** + * Unescape a URL, but leaving %2f (slashes) escaped + * @param url The url to unescape + * @param decode_slashes Whether or not slashes should be decoded + * @return 0 on success, non-zero otherwise + */ +AP_DECLARE(int) ap_unescape_url_keep2f(char *url, int decode_slashes); + +#define AP_UNESCAPE_URL_KEEP_UNRESERVED (1u << 0) +#define AP_UNESCAPE_URL_FORBID_SLASHES (1u << 1) +#define AP_UNESCAPE_URL_KEEP_SLASHES (1u << 2) + +/** + * Unescape a URL, with options + * @param url The url to unescape + * @param flags Bitmask of AP_UNESCAPE_URL_* flags + * @return 0 on success, non-zero otherwise + */ +AP_DECLARE(int) ap_unescape_url_ex(char *url, unsigned int flags); + +/** + * Unescape an application/x-www-form-urlencoded string + * @param query The query to unescape + * @return 0 on success, non-zero otherwise + */ +AP_DECLARE(int) ap_unescape_urlencoded(char *query); + +/** + * Convert all double slashes to single slashes, except where significant + * to the filesystem on the current platform. + * @param name The string to convert, assumed to be a filesystem path + */ +AP_DECLARE(void) ap_no2slash(char *name); + +/** + * Convert all double slashes to single slashes, except where significant + * to the filesystem on the current platform. + * @param name The string to convert + * @param is_fs_path if set to 0, the significance of any double-slashes is + * ignored. + */ +AP_DECLARE(void) ap_no2slash_ex(char *name, int is_fs_path); + +#define AP_NORMALIZE_ALLOW_RELATIVE (1u << 0) +#define AP_NORMALIZE_NOT_ABOVE_ROOT (1u << 1) +#define AP_NORMALIZE_DECODE_UNRESERVED (1u << 2) +#define AP_NORMALIZE_MERGE_SLASHES (1u << 3) +#define AP_NORMALIZE_DROP_PARAMETERS (0) /* deprecated */ + +/** + * Remove all ////, /./ and /xx/../ substrings from a path, and more + * depending on passed in flags. + * @param path The path to normalize + * @param flags bitmask of AP_NORMALIZE_* flags + * @return non-zero on success + */ +AP_DECLARE(int) ap_normalize_path(char *path, unsigned int flags); + +/** + * Remove all ./ and xx/../ substrings from a file name. Also remove + * any leading ../ or /../ substrings. + * @param name the file name to parse + */ +AP_DECLARE(void) ap_getparents(char *name); + +/** + * Escape a path segment, as defined in RFC 1808 + * @param p The pool to allocate from + * @param s The path to convert + * @return The converted URL + */ +AP_DECLARE(char *) ap_escape_path_segment(apr_pool_t *p, const char *s); + +/** + * Escape a path segment, as defined in RFC 1808, to a preallocated buffer. + * @param c The preallocated buffer to write to + * @param s The path to convert + * @return The converted URL (c) + */ +AP_DECLARE(char *) ap_escape_path_segment_buffer(char *c, const char *s); + +/** + * convert an OS path to a URL in an OS dependent way. + * @param p The pool to allocate from + * @param path The path to convert + * @param partial if set, assume that the path will be appended to something + * with a '/' in it (and thus does not prefix "./") + * @return The converted URL + */ +AP_DECLARE(char *) ap_os_escape_path(apr_pool_t *p, const char *path, int partial); + +/** @see ap_os_escape_path */ +#define ap_escape_uri(ppool,path) ap_os_escape_path(ppool,path,1) + +/** + * Escape a string as application/x-www-form-urlencoded + * @param p The pool to allocate from + * @param s The path to convert + * @return The converted URL + */ +AP_DECLARE(char *) ap_escape_urlencoded(apr_pool_t *p, const char *s); + +/** + * Escape a string as application/x-www-form-urlencoded, to a preallocated buffer + * @param c The preallocated buffer to write to + * @param s The path to convert + * @return The converted URL (c) + */ +AP_DECLARE(char *) ap_escape_urlencoded_buffer(char *c, const char *s); + +/** + * Escape an html string + * @param p The pool to allocate from + * @param s The html to escape + * @return The escaped string + */ +#define ap_escape_html(p,s) ap_escape_html2(p,s,0) +/** + * Escape an html string + * @param p The pool to allocate from + * @param s The html to escape + * @param toasc Whether to escape all non-ASCII chars to \&\#nnn; + * @return The escaped string + */ +AP_DECLARE(char *) ap_escape_html2(apr_pool_t *p, const char *s, int toasc); + +/** + * Escape a string for logging + * @param p The pool to allocate from + * @param str The string to escape + * @return The escaped string + */ +AP_DECLARE(char *) ap_escape_logitem(apr_pool_t *p, const char *str); + +/** + * Escape a string for logging into the error log (without a pool) + * @param dest The buffer to write to + * @param source The string to escape + * @param buflen The buffer size for the escaped string (including "\0") + * @return The len of the escaped string (always < maxlen) + */ +AP_DECLARE(apr_size_t) ap_escape_errorlog_item(char *dest, const char *source, + apr_size_t buflen); + +/** + * Construct a full hostname + * @param p The pool to allocate from + * @param hostname The hostname of the server + * @param port The port the server is running on + * @param r The current request + * @return The server's hostname + */ +AP_DECLARE(char *) ap_construct_server(apr_pool_t *p, const char *hostname, + apr_port_t port, const request_rec *r); + +/** + * Escape a shell command + * @param p The pool to allocate from + * @param s The command to escape + * @return The escaped shell command + */ +AP_DECLARE(char *) ap_escape_shell_cmd(apr_pool_t *p, const char *s); + +/** + * Count the number of directories in a path + * @param path The path to count + * @return The number of directories + */ +AP_DECLARE(int) ap_count_dirs(const char *path); + +/** + * Copy at most @a n leading directories of @a s into @a d. @a d + * should be at least as large as @a s plus 1 extra byte + * + * @param d The location to copy to + * @param s The location to copy from + * @param n The number of directories to copy + * @return value is the ever useful pointer to the trailing "\0" of d + * @note on platforms with drive letters, n = 0 returns the "/" root, + * whereas n = 1 returns the "d:/" root. On all other platforms, n = 0 + * returns the empty string. */ +AP_DECLARE(char *) ap_make_dirstr_prefix(char *d, const char *s, int n); + +/** + * Return the parent directory name (including trailing /) of the file + * @a s + * @param p The pool to allocate from + * @param s The file to get the parent of + * @return A copy of the file's parent directory + */ +AP_DECLARE(char *) ap_make_dirstr_parent(apr_pool_t *p, const char *s); + +/** + * Given a directory and filename, create a single path from them. This + * function is smart enough to ensure that there is a single '/' between the + * directory and file names + * @param a The pool to allocate from + * @param dir The directory name + * @param f The filename + * @return A copy of the full path + * @note Never consider using this function if you are dealing with filesystem + * names that need to remain canonical, unless you are merging an apr_dir_read + * path and returned filename. Otherwise, the result is not canonical. + */ +AP_DECLARE(char *) ap_make_full_path(apr_pool_t *a, const char *dir, const char *f); + +/** + * Test if the given path has an absolute path. + * @param p The pool to allocate from + * @param dir The directory name + * @note The converse is not necessarily true, some OS's (Win32/OS2/Netware) have + * multiple forms of absolute paths. This only reports if the path is absolute + * in a canonical sense. + */ +AP_DECLARE(int) ap_os_is_path_absolute(apr_pool_t *p, const char *dir); + +/** + * Does the provided string contain wildcard characters? This is useful + * for determining if the string should be passed to strcmp_match or to strcmp. + * The only wildcard characters recognized are '?' and '*' + * @param str The string to check + * @return 1 if the string has wildcards, 0 otherwise + */ +AP_DECLARE(int) ap_is_matchexp(const char *str); + +/** + * Determine if a string matches a pattern containing the wildcards '?' or '*' + * @param str The string to check + * @param expected The pattern to match against + * @return 0 if the two strings match, 1 otherwise + */ +AP_DECLARE(int) ap_strcmp_match(const char *str, const char *expected); + +/** + * Determine if a string matches a pattern containing the wildcards '?' or '*', + * ignoring case + * @param str The string to check + * @param expected The pattern to match against + * @return 0 if the two strings match, 1 otherwise + */ +AP_DECLARE(int) ap_strcasecmp_match(const char *str, const char *expected); + +/** + * Find the first occurrence of the substring s2 in s1, regardless of case + * @param s1 The string to search + * @param s2 The substring to search for + * @return A pointer to the beginning of the substring + * @remark See apr_strmatch() for a faster alternative + */ +AP_DECLARE(char *) ap_strcasestr(const char *s1, const char *s2); + +/** + * Return a pointer to the location inside of bigstring immediately after prefix + * @param bigstring The input string + * @param prefix The prefix to strip away + * @return A pointer relative to bigstring after prefix + */ +AP_DECLARE(const char *) ap_stripprefix(const char *bigstring, + const char *prefix); + +/** + * Decode a base64 encoded string into memory allocated from a pool + * @param p The pool to allocate from + * @param bufcoded The encoded string + * @return The decoded string + */ +AP_DECLARE(char *) ap_pbase64decode(apr_pool_t *p, const char *bufcoded); + +/** + * Encode a string into memory allocated from a pool in base 64 format + * @param p The pool to allocate from + * @param string The plaintext string + * @return The encoded string + */ +AP_DECLARE(char *) ap_pbase64encode(apr_pool_t *p, char *string); + +/** + * Compile a regular expression to be used later. The regex is freed when + * the pool is destroyed. + * @param p The pool to allocate from + * @param pattern the regular expression to compile + * @param cflags The bitwise or of one or more of the following: + * @li REG_EXTENDED - Use POSIX extended Regular Expressions + * @li REG_ICASE - Ignore case + * @li REG_NOSUB - Support for substring addressing of matches + * not required + * @li REG_NEWLINE - Match-any-character operators don't match new-line + * @return The compiled regular expression + */ +AP_DECLARE(ap_regex_t *) ap_pregcomp(apr_pool_t *p, const char *pattern, + int cflags); + +/** + * Free the memory associated with a compiled regular expression + * @param p The pool the regex was allocated from + * @param reg The regular expression to free + * @note This function is only necessary if the regex should be cleaned + * up before the pool + */ +AP_DECLARE(void) ap_pregfree(apr_pool_t *p, ap_regex_t *reg); + +/** + * After performing a successful regex match, you may use this function to + * perform a series of string substitutions based on subexpressions that were + * matched during the call to ap_regexec. This function is limited to + * result strings of 64K. Consider using ap_pregsub_ex() instead. + * @param p The pool to allocate from + * @param input An arbitrary string containing $1 through $9. These are + * replaced with the corresponding matched sub-expressions + * @param source The string that was originally matched to the regex + * @param nmatch the nmatch returned from ap_pregex + * @param pmatch the pmatch array returned from ap_pregex + * @return The substituted string, or NULL on error + */ +AP_DECLARE(char *) ap_pregsub(apr_pool_t *p, const char *input, + const char *source, apr_size_t nmatch, + ap_regmatch_t pmatch[]); + +/** + * After performing a successful regex match, you may use this function to + * perform a series of string substitutions based on subexpressions that were + * matched during the call to ap_regexec + * @param p The pool to allocate from + * @param result where to store the result, will be set to NULL on error + * @param input An arbitrary string containing $1 through $9. These are + * replaced with the corresponding matched sub-expressions + * @param source The string that was originally matched to the regex + * @param nmatch the nmatch returned from ap_pregex + * @param pmatch the pmatch array returned from ap_pregex + * @param maxlen the maximum string length to return, 0 for unlimited + * @return APR_SUCCESS if successful, APR_ENOMEM or other error code otherwise. + */ +AP_DECLARE(apr_status_t) ap_pregsub_ex(apr_pool_t *p, char **result, + const char *input, const char *source, + apr_size_t nmatch, + ap_regmatch_t pmatch[], + apr_size_t maxlen); + +/** + * We want to downcase the type/subtype for comparison purposes + * but nothing else because ;parameter=foo values are case sensitive. + * @param s The content-type to convert to lowercase + */ +AP_DECLARE(void) ap_content_type_tolower(char *s); + +/** + * convert a string to all lowercase + * @param s The string to convert to lowercase + */ +AP_DECLARE(void) ap_str_tolower(char *s); + +/** + * convert a string to all uppercase + * @param s The string to convert to uppercase + */ +AP_DECLARE(void) ap_str_toupper(char *s); + +/** + * Search a string from left to right for the first occurrence of a + * specific character + * @param str The string to search + * @param c The character to search for + * @return The index of the first occurrence of c in str + */ +AP_DECLARE(int) ap_ind(const char *str, char c); /* Sigh... */ + +/** + * Search a string from right to left for the first occurrence of a + * specific character + * @param str The string to search + * @param c The character to search for + * @return The index of the first occurrence of c in str + */ +AP_DECLARE(int) ap_rind(const char *str, char c); + +/** + * Given a string, replace any bare " with \\" . + * @param p The pool to allocate memory from + * @param instring The string to search for " + * @return A copy of the string with escaped quotes + */ +AP_DECLARE(char *) ap_escape_quotes(apr_pool_t *p, const char *instring); + +/** + * Given a string, append the PID deliminated by delim. + * Usually used to create a pid-appended filepath name + * (eg: /a/b/foo -> /a/b/foo.6726). A function, and not + * a macro, to avoid unistd.h dependency + * @param p The pool to allocate memory from + * @param string The string to append the PID to + * @param delim The string to use to deliminate the string from the PID + * @return A copy of the string with the PID appended + */ +AP_DECLARE(char *) ap_append_pid(apr_pool_t *p, const char *string, + const char *delim); + +/** + * Parse a length string with decimal characters only, no leading sign nor + * trailing character, like Content-Length or (Content-)Range headers. + * @param len The parsed length (apr_off_t) + * @param str The string to parse + * @return 1 (success), 0 (failure) + */ +AP_DECLARE(int) ap_parse_strict_length(apr_off_t *len, const char *str); + +/** + * Parse a given timeout parameter string into an apr_interval_time_t value. + * The unit of the time interval is given as postfix string to the numeric + * string. Currently the following units are understood: + * + * ms : milliseconds + * s : seconds + * mi[n] : minutes + * h : hours + * + * If no unit is contained in the given timeout parameter the default_time_unit + * will be used instead. + * @param timeout_parameter The string containing the timeout parameter. + * @param timeout The timeout value to be returned. + * @param default_time_unit The default time unit to use if none is specified + * in timeout_parameter. + * @return Status value indicating whether the parsing was successful or not. + */ +AP_DECLARE(apr_status_t) ap_timeout_parameter_parse( + const char *timeout_parameter, + apr_interval_time_t *timeout, + const char *default_time_unit); + +/** + * Determine if a request has a request body or not. + * + * @param r the request_rec of the request + * @return truth value + */ +AP_DECLARE(int) ap_request_has_body(request_rec *r); + +/** + * Cleanup a string (mainly to be filesystem safe) + * We only allow '_' and alphanumeric chars. Non-printable + * map to 'x' and all others map to '_' + * + * @param p pool to use to allocate dest + * @param src string to clean up + * @param dest cleaned up, allocated string + * @return Status value indicating whether the cleaning was successful or not. + */ +AP_DECLARE(apr_status_t) ap_pstr2_alnum(apr_pool_t *p, const char *src, + const char **dest); + +/** + * Cleanup a string (mainly to be filesystem safe) + * We only allow '_' and alphanumeric chars. Non-printable + * map to 'x' and all others map to '_' + * + * @param src string to clean up + * @param dest cleaned up, pre-allocated string + * @return Status value indicating whether the cleaning was successful or not. + */ +AP_DECLARE(apr_status_t) ap_str2_alnum(const char *src, char *dest); + +/** + * Structure to store the contents of an HTTP form of the type + * application/x-www-form-urlencoded. + * + * Currently it contains the name as a char* of maximum length + * HUGE_STRING_LEN, and a value in the form of a bucket brigade + * of arbitrary length. + */ +typedef struct { + const char *name; + apr_bucket_brigade *value; +} ap_form_pair_t; + +/** + * Read the body and parse any form found, which must be of the + * type application/x-www-form-urlencoded. + * @param r request containing POSTed form data + * @param f filter + * @param ptr returned array of ap_form_pair_t + * @param num max num of params or -1 for unlimited + * @param size max size allowed for parsed data + * @return OK or HTTP error + */ +AP_DECLARE(int) ap_parse_form_data(request_rec *r, struct ap_filter_t *f, + apr_array_header_t **ptr, + apr_size_t num, apr_size_t size); + +/* Misc system hackery */ +/** + * Given the name of an object in the file system determine if it is a directory + * @param p The pool to allocate from + * @param name The name of the object to check + * @return 1 if it is a directory, 0 otherwise + */ +AP_DECLARE(int) ap_is_rdirectory(apr_pool_t *p, const char *name); + +/** + * Given the name of an object in the file system determine if it is a directory - this version is symlink aware + * @param p The pool to allocate from + * @param name The name of the object to check + * @return 1 if it is a directory, 0 otherwise + */ +AP_DECLARE(int) ap_is_directory(apr_pool_t *p, const char *name); + +#ifdef _OSD_POSIX +extern int os_init_job_environment(server_rec *s, const char *user_name, int one_process); +#endif /* _OSD_POSIX */ + +/** + * Determine the local host name for the current machine + * @param p The pool to allocate from + * @return A copy of the local host name + */ +char *ap_get_local_host(apr_pool_t *p); + +/** + * Log an assertion to the error log + * @param szExp The assertion that failed + * @param szFile The file the assertion is in + * @param nLine The line the assertion is defined on + */ +AP_DECLARE(void) ap_log_assert(const char *szExp, const char *szFile, int nLine) + __attribute__((noreturn)); + +/** + * @internal Internal Assert function + */ +#define ap_assert(exp) ((exp) ? (void)0 : ap_log_assert(#exp,__FILE__,__LINE__)) + +/** + * Redefine assert() to something more useful for an Apache... + * + * Use ap_assert() if the condition should always be checked. + * Use AP_DEBUG_ASSERT() if the condition should only be checked when AP_DEBUG + * is defined. + */ +#ifdef AP_DEBUG +#define AP_DEBUG_ASSERT(exp) ap_assert(exp) +#else +#define AP_DEBUG_ASSERT(exp) ((void)0) +#endif + +/** + * @defgroup stopsignal Flags which indicate places where the server should stop for debugging. + * @{ + * A set of flags which indicate places where the server should raise(SIGSTOP). + * This is useful for debugging, because you can then attach to that process + * with gdb and continue. This is important in cases where one_process + * debugging isn't possible. + */ +/** stop on a Detach */ +#define SIGSTOP_DETACH 1 +/** stop making a child process */ +#define SIGSTOP_MAKE_CHILD 2 +/** stop spawning a child process */ +#define SIGSTOP_SPAWN_CHILD 4 +/** stop spawning a child process with a piped log */ +#define SIGSTOP_PIPED_LOG_SPAWN 8 +/** stop spawning a CGI child process */ +#define SIGSTOP_CGI_CHILD 16 + +/** Macro to get GDB started */ +#ifdef DEBUG_SIGSTOP +extern int raise_sigstop_flags; +#define RAISE_SIGSTOP(x) do { \ + if (raise_sigstop_flags & SIGSTOP_##x) raise(SIGSTOP);\ + } while (0) +#else +#define RAISE_SIGSTOP(x) +#endif +/** @} */ +/** + * Get HTML describing the address and (optionally) admin of the server. + * @param prefix Text which is prepended to the return value + * @param r The request_rec + * @return HTML describing the server, allocated in @a r's pool. + */ +AP_DECLARE(const char *) ap_psignature(const char *prefix, request_rec *r); + + /* The C library has functions that allow const to be silently dropped ... + these macros detect the drop in maintainer mode, but use the native + methods for normal builds + + Note that on some platforms (e.g., AIX with gcc, Solaris with gcc), string.h needs + to be included before the macros are defined or compilation will fail. + */ +#include <string.h> + +AP_DECLARE(char *) ap_strchr(char *s, int c); +AP_DECLARE(const char *) ap_strchr_c(const char *s, int c); +AP_DECLARE(char *) ap_strrchr(char *s, int c); +AP_DECLARE(const char *) ap_strrchr_c(const char *s, int c); +AP_DECLARE(char *) ap_strstr(char *s, const char *c); +AP_DECLARE(const char *) ap_strstr_c(const char *s, const char *c); + +#ifdef AP_DEBUG + +#undef strchr +# define strchr(s, c) ap_strchr(s,c) +#undef strrchr +# define strrchr(s, c) ap_strrchr(s,c) +#undef strstr +# define strstr(s, c) ap_strstr(s,c) + +#else + +/** use this instead of strchr */ +# define ap_strchr(s, c) strchr(s, c) +/** use this instead of strchr */ +# define ap_strchr_c(s, c) strchr(s, c) +/** use this instead of strrchr */ +# define ap_strrchr(s, c) strrchr(s, c) +/** use this instead of strrchr */ +# define ap_strrchr_c(s, c) strrchr(s, c) +/** use this instead of strrstr*/ +# define ap_strstr(s, c) strstr(s, c) +/** use this instead of strrstr*/ +# define ap_strstr_c(s, c) strstr(s, c) + +#endif + +/** + * Generate pseudo random bytes. + * This is a convenience interface to apr_random. It is cheaper but less + * secure than apr_generate_random_bytes(). + * @param buf where to store the bytes + * @param size number of bytes to generate + * @note ap_random_insecure_bytes() is thread-safe, it uses a mutex on + * threaded MPMs. + */ +AP_DECLARE(void) ap_random_insecure_bytes(void *buf, apr_size_t size); + +/** + * Get a pseudo random number in a range. + * @param min low end of range + * @param max high end of range + * @return a number in the range + */ +AP_DECLARE(apr_uint32_t) ap_random_pick(apr_uint32_t min, apr_uint32_t max); + +/** + * Abort with a error message signifying out of memory + */ +AP_DECLARE(void) ap_abort_on_oom(void) __attribute__((noreturn)); + +/** + * Wrapper for malloc() that calls ap_abort_on_oom() if out of memory + * @param size size of the memory block + * @return pointer to the allocated memory + * @note ap_malloc may be implemented as a macro + */ +AP_DECLARE(void *) ap_malloc(size_t size) + __attribute__((malloc)) + AP_FN_ATTR_ALLOC_SIZE(1); + +/** + * Wrapper for calloc() that calls ap_abort_on_oom() if out of memory + * @param nelem number of elements to allocate memory for + * @param size size of a single element + * @return pointer to the allocated memory + * @note ap_calloc may be implemented as a macro + */ +AP_DECLARE(void *) ap_calloc(size_t nelem, size_t size) + __attribute__((malloc)) + AP_FN_ATTR_ALLOC_SIZE2(1,2); + +/** + * Wrapper for realloc() that calls ap_abort_on_oom() if out of memory + * @param ptr pointer to the old memory block (or NULL) + * @param size new size of the memory block + * @return pointer to the reallocated memory + * @note ap_realloc may be implemented as a macro + */ +AP_DECLARE(void *) ap_realloc(void *ptr, size_t size) + AP_FN_ATTR_WARN_UNUSED_RESULT + AP_FN_ATTR_ALLOC_SIZE(2); + +#if APR_HAS_THREADS + +#if APR_VERSION_AT_LEAST(1,8,0) && !defined(AP_NO_THREAD_LOCAL) + +/** + * APR 1.8+ implement those already. + */ +#if APR_HAS_THREAD_LOCAL +#define AP_HAS_THREAD_LOCAL 1 +#define AP_THREAD_LOCAL APR_THREAD_LOCAL +#else +#define AP_HAS_THREAD_LOCAL 0 +#endif +#define ap_thread_create apr_thread_create +#define ap_thread_current apr_thread_current +#define ap_thread_current_create apr_thread_current_create +#define ap_thread_current_after_fork apr_thread_current_after_fork + +#else /* APR_VERSION_AT_LEAST(1,8,0) && !defined(AP_NO_THREAD_LOCAL) */ + +#ifndef AP_NO_THREAD_LOCAL +/** + * AP_THREAD_LOCAL keyword mapping the compiler's. + */ +#if defined(__cplusplus) && __cplusplus >= 201103L +#define AP_THREAD_LOCAL thread_local +#elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 201112 && \ + (!defined(__GNUC__) || \ + __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 9)) +#define AP_THREAD_LOCAL _Thread_local +#elif defined(__GNUC__) /* works for clang too */ +#define AP_THREAD_LOCAL __thread +#elif defined(WIN32) && defined(_MSC_VER) +#define AP_THREAD_LOCAL __declspec(thread) +#endif +#endif /* ndef AP_NO_THREAD_LOCAL */ + +#ifndef AP_THREAD_LOCAL +#define AP_HAS_THREAD_LOCAL 0 +#define ap_thread_create apr_thread_create +#else /* AP_THREAD_LOCAL */ +#define AP_HAS_THREAD_LOCAL 1 +AP_DECLARE(apr_status_t) ap_thread_create(apr_thread_t **thread, + apr_threadattr_t *attr, + apr_thread_start_t func, + void *data, apr_pool_t *pool); +#endif /* AP_THREAD_LOCAL */ + +AP_DECLARE(apr_status_t) ap_thread_current_create(apr_thread_t **current, + apr_threadattr_t *attr, + apr_pool_t *pool); +AP_DECLARE(void) ap_thread_current_after_fork(void); +AP_DECLARE(apr_thread_t *) ap_thread_current(void); + +#endif /* APR_VERSION_AT_LEAST(1,8,0) && !defined(AP_NO_THREAD_LOCAL) */ + +AP_DECLARE(apr_status_t) ap_thread_main_create(apr_thread_t **thread, + apr_pool_t *pool); + +#else /* APR_HAS_THREADS */ + +#define AP_HAS_THREAD_LOCAL 0 + +#endif /* APR_HAS_THREADS */ + +/** + * Get server load params + * @param ld struct to populate: -1 in fields means error + */ +AP_DECLARE(void) ap_get_sload(ap_sload_t *ld); + +/** + * Get server load averages (ala getloadavg) + * @param ld struct to populate: -1 in fields means error + */ +AP_DECLARE(void) ap_get_loadavg(ap_loadavg_t *ld); + +/** + * Convert binary data into a hex string + * @param src pointer to the data + * @param srclen length of the data + * @param dest pointer to buffer of length (2 * srclen + 1). The resulting + * string will be NUL-terminated. + */ +AP_DECLARE(void) ap_bin2hex(const void *src, apr_size_t srclen, char *dest); + +/** + * Short function to execute a command and return the first line of + * output minus \\r \\n. Useful for "obscuring" passwords via exec calls + * @param p the pool to allocate from + * @param cmd the command to execute + * @param argv the arguments to pass to the cmd + * @return ptr to characters or NULL on any error + */ +AP_DECLARE(char *) ap_get_exec_line(apr_pool_t *p, + const char *cmd, + const char * const *argv); + +#define AP_NORESTART APR_OS_START_USEERR + 1 + +/** + * Get the first index of the string in the array or -1 if not found. Start + * searching a start. + * @param array The array the check + * @param s The string to find + * @param start Start index for search. If start is out of bounds (negative or + equal to array length or greater), -1 will be returned. + * @return index of string in array or -1 + */ +AP_DECLARE(int) ap_array_str_index(const apr_array_header_t *array, + const char *s, + int start); + +/** + * Check if the string is member of the given array by strcmp. + * @param array The array the check + * @param s The string to find + * @return !=0 iff string is member of array (via strcmp) + */ +AP_DECLARE(int) ap_array_str_contains(const apr_array_header_t *array, + const char *s); + +/** + * Perform a case-insensitive comparison of two strings @a str1 and @a str2, + * treating upper and lower case values of the 26 standard C/POSIX alphabetic + * characters as equivalent. Extended latin characters outside of this set + * are treated as unique octets, irrespective of the current locale. + * + * Returns in integer greater than, equal to, or less than 0, + * according to whether @a str1 is considered greater than, equal to, + * or less than @a str2. + * + * @note Same code as apr_cstr_casecmp, which arrives in APR 1.6 + */ +AP_DECLARE(int) ap_cstr_casecmp(const char *s1, const char *s2); + +/** + * Perform a case-insensitive comparison of two strings @a str1 and @a str2, + * treating upper and lower case values of the 26 standard C/POSIX alphabetic + * characters as equivalent. Extended latin characters outside of this set + * are treated as unique octets, irrespective of the current locale. + * + * Returns in integer greater than, equal to, or less than 0, + * according to whether @a str1 is considered greater than, equal to, + * or less than @a str2. + * + * @note Same code as apr_cstr_casecmpn, which arrives in APR 1.6 + */ +AP_DECLARE(int) ap_cstr_casecmpn(const char *s1, const char *s2, apr_size_t n); + +/** + * Default flags for ap_dir_*fnmatch(). + */ +#define AP_DIR_FLAG_NONE 0 + +/** + * If set, wildcards that match no files or directories will be ignored, otherwise + * an error is triggered. + */ +#define AP_DIR_FLAG_OPTIONAL 1 + +/** + * If set, and the wildcard resolves to a directory, recursively find all files + * below that directory, otherwise return the directory. + */ +#define AP_DIR_FLAG_RECURSIVE 2 + +/** + * Structure to provide the state of a directory match. + */ +typedef struct ap_dir_match_t ap_dir_match_t; + +/** + * Concrete structure to provide the state of a directory match. + */ +struct ap_dir_match_t { + /** Pool to use for allocating the result */ + apr_pool_t *p; + /** Temporary pool used for directory traversal */ + apr_pool_t *ptemp; + /** Prefix for log messages */ + const char *prefix; + /** Callback for each file found that matches the wildcard. Return NULL on success, an error string on error. */ + const char *(*cb)(ap_dir_match_t *w, const char *fname); + /** Context for the callback */ + void *ctx; + /** Flags to indicate whether optional or recursive */ + int flags; + /** Recursion depth safety check */ + unsigned int depth; +}; + +/** + * Search for files given a non wildcard filename with non native separators. + * + * If the provided filename points at a file, the callback within ap_dir_match_t is + * triggered for that file, and this function returns the result of the callback. + * + * If the provided filename points at a directory, and recursive within ap_dir_match_t + * is true, the callback will be triggered for every file found recursively beneath + * that directory, otherwise the callback is triggered once for the directory itself. + * This function returns the result of the callback. + * + * If the provided path points to neither a file nor a directory, and optional within + * ap_dir_match_t is true, this function returns NULL. If optional within ap_dir_match_t + * is false, this function will return an error string indicating that the path does not + * exist. + * + * @param w Directory match structure containing callback and context. + * @param fname The name of the file or directory, with non native separators. + * @return NULL on success, or a string describing the error. + */ +AP_DECLARE(const char *)ap_dir_nofnmatch(ap_dir_match_t *w, const char *fname) + __attribute__((nonnull(1,2))); + +/** + * Search for files given a wildcard filename with non native separators. + * + * If the filename contains a wildcard, all files and directories that match the wildcard + * will be returned. + * + * ap_dir_nofnmatch() is called for each directory and file found, and the callback + * within ap_dir_match_t triggered as described above. + * + * Wildcards may appear in both directory and file components in the path, and + * wildcards may appear more than once. + * + * @param w Directory match structure containing callback and context. + * @param path Path prefix for search, with non native separators and no wildcards. + * @param fname The name of the file or directory, with non native separators and + * optional wildcards. + * @return NULL on success, or a string describing the error. + */ +AP_DECLARE(const char *)ap_dir_fnmatch(ap_dir_match_t *w, const char *path, + const char *fname) __attribute__((nonnull(1,3))); + +/** + * Determine if the final Transfer-Encoding is "chunked". + * + * @param p The pool to allocate from + * @param line the header field-value to scan + * @return 1 if the last Transfer-Encoding is "chunked", else 0 + */ +AP_DECLARE(int) ap_is_chunked(apr_pool_t *p, const char *line); + +#ifdef __cplusplus +} +#endif + +#endif /* !APACHE_HTTPD_H */ + +/** @} //APACHE Daemon */ +/** @} //APACHE Core */ +/** @} //APACHE super group */ + |