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Edit File: http_core.h
/* 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_poll.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_host * @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); /** * Get the size of read buffers * @param r The current request * @return The read buffers size */ AP_DECLARE(apr_size_t) ap_get_read_buf_size(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_DIGEST (1 << 4) #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; apr_size_t read_buf_size; } 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; unsigned int merge_slashes; /* symlink protection */ #define AP_SYMLINK_PROTECT_UNSET 0 #define AP_SYMLINK_PROTECT_ENABLE 1 #define AP_SYMLINK_PROTECT_DISABLE 2 int symlink_protect; const char *symlink_protect_root; apr_size_t flush_max_threshold; apr_int32_t flush_max_pipelined; unsigned int strict_host_check; #ifdef WIN32 apr_array_header_t *unc_list; #endif } 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; struct core_filter_ctx { apr_bucket_brigade *b; apr_bucket_brigade *tmpbb; }; 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 /** Get a apr_pollfd_t populated with descriptor and descriptor type * and the timeout to use for it. * @return APR_ENOTIMPL if not supported for a connection. */ AP_DECLARE_HOOK(apr_status_t, get_pollfd_from_conn, (conn_rec *c, struct apr_pollfd_t *pfd, apr_interval_time_t *ptimeout)) /** * Pass in a `struct apr_pollfd_t*` and get `desc_type` and `desc` * populated with a suitable value for polling connection input. * For primary connection (c->master == NULL), this will be the connection * socket. For secondary connections this may differ or not be available * at all. * Note that APR_NO_DESC may be set to indicate that the connection * input is already closed. * * @param pfd the pollfd to set the descriptor in * @param ptimeout != NULL to retrieve the timeout in effect * @return ARP_SUCCESS when the information was assigned. */ AP_CORE_DECLARE(apr_status_t) ap_get_pollfd_from_conn(conn_rec *c, struct apr_pollfd_t *pfd, apr_interval_time_t *ptimeout); #ifdef __cplusplus } #endif #endif /* !APACHE_HTTP_CORE_H */ /** @} */