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/* 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.
*/
#include "apr.h"
#include "apr_strings.h"
#include "apr_lib.h"
#include "apr_fnmatch.h"
#include "apr_hash.h"
#include "apr_thread_proc.h" /* for RLIMIT stuff */
#include "apr_random.h"
#define APR_WANT_IOVEC
#define APR_WANT_STRFUNC
#define APR_WANT_MEMFUNC
#include "apr_want.h"
#include "ap_config.h"
#include "httpd.h"
#include "http_config.h"
#include "http_core.h"
#include "http_protocol.h" /* For index_of_response(). Grump. */
#include "http_request.h"
#include "http_vhost.h"
#include "http_main.h" /* For the default_handler below... */
#include "http_log.h"
#include "util_md5.h"
#include "http_connection.h"
#include "apr_buckets.h"
#include "util_filter.h"
#include "util_ebcdic.h"
#include "util_mutex.h"
#include "util_time.h"
#include "mpm_common.h"
#include "scoreboard.h"
#include "mod_core.h"
#include "mod_proxy.h"
#include "ap_listen.h"
#include "mod_so.h" /* for ap_find_loaded_module_symbol */
#if defined(RLIMIT_CPU) || defined (RLIMIT_DATA) || defined (RLIMIT_VMEM) || defined(RLIMIT_AS) || defined (RLIMIT_NPROC)
#include "unixd.h"
#endif
#if APR_HAVE_UNISTD_H
#include <unistd.h>
#endif
/* LimitRequestBody handling */
#define AP_LIMIT_REQ_BODY_UNSET ((apr_off_t) -1)
#define AP_DEFAULT_LIMIT_REQ_BODY ((apr_off_t) 0)
/* LimitXMLRequestBody handling */
#define AP_LIMIT_UNSET ((long) -1)
#define AP_DEFAULT_LIMIT_XML_BODY ((apr_size_t)1000000)
#define AP_MIN_SENDFILE_BYTES (256)
/* maximum include nesting level */
#ifndef AP_MAX_INCLUDE_DEPTH
#define AP_MAX_INCLUDE_DEPTH (128)
#endif
/* valid in core-conf, but not in runtime r->used_path_info */
#define AP_ACCEPT_PATHINFO_UNSET 3
#define AP_CONTENT_MD5_OFF 0
#define AP_CONTENT_MD5_ON 1
#define AP_CONTENT_MD5_UNSET 2
APR_HOOK_STRUCT(
APR_HOOK_LINK(get_mgmt_items)
APR_HOOK_LINK(insert_network_bucket)
)
AP_IMPLEMENT_HOOK_RUN_ALL(int, get_mgmt_items,
(apr_pool_t *p, const char *val, apr_hash_t *ht),
(p, val, ht), OK, DECLINED)
AP_IMPLEMENT_HOOK_RUN_FIRST(apr_status_t, insert_network_bucket,
(conn_rec *c, apr_bucket_brigade *bb,
apr_socket_t *socket),
(c, bb, socket), AP_DECLINED)
/* Server core module... This module provides support for really basic
* server operations, including options and commands which control the
* operation of other modules. Consider this the bureaucracy module.
*
* The core module also defines handlers, etc., to handle just enough
* to allow a server with the core module ONLY to actually serve documents.
*
* This file could almost be mod_core.c, except for the stuff which affects
* the http_conf_globals.
*/
/* we know core's module_index is 0 */
#undef APLOG_MODULE_INDEX
#define APLOG_MODULE_INDEX AP_CORE_MODULE_INDEX
/* Handles for core filters */
AP_DECLARE_DATA ap_filter_rec_t *ap_subreq_core_filter_handle;
AP_DECLARE_DATA ap_filter_rec_t *ap_core_output_filter_handle;
AP_DECLARE_DATA ap_filter_rec_t *ap_content_length_filter_handle;
AP_DECLARE_DATA ap_filter_rec_t *ap_core_input_filter_handle;
/* Provide ap_document_root_check storage and default value = true */
AP_DECLARE_DATA int ap_document_root_check = 1;
/* magic pointer for ErrorDocument xxx "default" */
static char errordocument_default;
static apr_array_header_t *saved_server_config_defines = NULL;
static apr_table_t *server_config_defined_vars = NULL;
AP_DECLARE_DATA int ap_main_state = AP_SQ_MS_INITIAL_STARTUP;
AP_DECLARE_DATA int ap_run_mode = AP_SQ_RM_UNKNOWN;
AP_DECLARE_DATA int ap_config_generation = 0;
static void *create_core_dir_config(apr_pool_t *a, char *dir)
{
core_dir_config *conf;
conf = (core_dir_config *)apr_pcalloc(a, sizeof(core_dir_config));
/* conf->r and conf->d[_*] are initialized by dirsection() or left NULL */
conf->opts = dir ? OPT_UNSET : OPT_UNSET|OPT_SYM_LINKS;
conf->opts_add = conf->opts_remove = OPT_NONE;
conf->override = OR_UNSET|OR_NONE;
conf->override_opts = OPT_UNSET | OPT_ALL | OPT_SYM_OWNER | OPT_MULTI;
conf->content_md5 = AP_CONTENT_MD5_UNSET;
conf->accept_path_info = AP_ACCEPT_PATHINFO_UNSET;
conf->use_canonical_name = USE_CANONICAL_NAME_UNSET;
conf->use_canonical_phys_port = USE_CANONICAL_PHYS_PORT_UNSET;
conf->hostname_lookups = HOSTNAME_LOOKUP_UNSET;
/*
* left as NULL (we use apr_pcalloc):
* conf->limit_cpu = NULL;
* conf->limit_mem = NULL;
* conf->limit_nproc = NULL;
* conf->sec_file = NULL;
* conf->sec_if = NULL;
*/
conf->limit_req_body = AP_LIMIT_REQ_BODY_UNSET;
conf->limit_xml_body = AP_LIMIT_UNSET;
conf->server_signature = srv_sig_unset;
conf->add_default_charset = ADD_DEFAULT_CHARSET_UNSET;
conf->add_default_charset_name = DEFAULT_ADD_DEFAULT_CHARSET_NAME;
/* Overriding all negotiation
* Set NULL by apr_pcalloc:
* conf->mime_type = NULL;
* conf->handler = NULL;
* conf->output_filters = NULL;
* conf->input_filters = NULL;
*/
/*
* Flag for use of inodes in ETags.
*/
conf->etag_bits = ETAG_UNSET;
conf->etag_add = ETAG_UNSET;
conf->etag_remove = ETAG_UNSET;
conf->enable_mmap = ENABLE_MMAP_UNSET;
conf->enable_sendfile = ENABLE_SENDFILE_UNSET;
conf->allow_encoded_slashes = 0;
conf->decode_encoded_slashes = 0;
conf->max_ranges = AP_MAXRANGES_UNSET;
conf->max_overlaps = AP_MAXRANGES_UNSET;
conf->max_reversals = AP_MAXRANGES_UNSET;
conf->cgi_pass_auth = AP_CGI_PASS_AUTH_UNSET;
conf->qualify_redirect_url = AP_CORE_CONFIG_UNSET;
return (void *)conf;
}
static void *merge_core_dir_configs(apr_pool_t *a, void *basev, void *newv)
{
core_dir_config *base = (core_dir_config *)basev;
core_dir_config *new = (core_dir_config *)newv;
core_dir_config *conf;
/* Create this conf by duplicating the base, replacing elements
* (or creating copies for merging) where new-> values exist.
*/
conf = (core_dir_config *)apr_pmemdup(a, base, sizeof(core_dir_config));
conf->d = new->d;
conf->d_is_fnmatch = new->d_is_fnmatch;
conf->d_components = new->d_components;
conf->r = new->r;
conf->refs = new->refs;
conf->condition = new->condition;
if (new->opts & OPT_UNSET) {
/* there was no explicit setting of new->opts, so we merge
* preserve the invariant (opts_add & opts_remove) == 0
*/
conf->opts_add = (conf->opts_add & ~new->opts_remove) | new->opts_add;
conf->opts_remove = (conf->opts_remove & ~new->opts_add)
| new->opts_remove;
conf->opts = (conf->opts & ~conf->opts_remove) | conf->opts_add;
/* If Includes was enabled with exec in the base config, but
* was enabled without exec in the new config, then disable
* exec in the merged set. */
if (((base->opts & (OPT_INCLUDES|OPT_INC_WITH_EXEC))
== (OPT_INCLUDES|OPT_INC_WITH_EXEC))
&& ((new->opts & (OPT_INCLUDES|OPT_INC_WITH_EXEC))
== OPT_INCLUDES)) {
conf->opts &= ~OPT_INC_WITH_EXEC;
}
}
else {
/* otherwise we just copy, because an explicit opts setting
* overrides all earlier +/- modifiers
*/
conf->opts = new->opts;
conf->opts_add = new->opts_add;
conf->opts_remove = new->opts_remove;
}
if (!(new->override & OR_UNSET)) {
conf->override = new->override;
}
if (!(new->override_opts & OPT_UNSET)) {
conf->override_opts = new->override_opts;
}
if (new->override_list != NULL) {
conf->override_list = new->override_list;
}
if (conf->response_code_exprs == NULL) {
conf->response_code_exprs = new->response_code_exprs;
}
else if (new->response_code_exprs != NULL) {
conf->response_code_exprs = apr_hash_overlay(a,
new->response_code_exprs, conf->response_code_exprs);
}
/* Otherwise we simply use the base->response_code_exprs array
*/
if (new->hostname_lookups != HOSTNAME_LOOKUP_UNSET) {
conf->hostname_lookups = new->hostname_lookups;
}
if (new->content_md5 != AP_CONTENT_MD5_UNSET) {
conf->content_md5 = new->content_md5;
}
if (new->accept_path_info != AP_ACCEPT_PATHINFO_UNSET) {
conf->accept_path_info = new->accept_path_info;
}
if (new->use_canonical_name != USE_CANONICAL_NAME_UNSET) {
conf->use_canonical_name = new->use_canonical_name;
}
if (new->use_canonical_phys_port != USE_CANONICAL_PHYS_PORT_UNSET) {
conf->use_canonical_phys_port = new->use_canonical_phys_port;
}
#ifdef RLIMIT_CPU
if (new->limit_cpu) {
conf->limit_cpu = new->limit_cpu;
}
#endif
#if defined(RLIMIT_DATA) || defined(RLIMIT_VMEM) || defined(RLIMIT_AS)
if (new->limit_mem) {
conf->limit_mem = new->limit_mem;
}
#endif
#ifdef RLIMIT_NPROC
if (new->limit_nproc) {
conf->limit_nproc = new->limit_nproc;
}
#endif
if (new->limit_req_body != AP_LIMIT_REQ_BODY_UNSET) {
conf->limit_req_body = new->limit_req_body;
}
if (new->limit_xml_body != AP_LIMIT_UNSET)
conf->limit_xml_body = new->limit_xml_body;
if (!conf->sec_file) {
conf->sec_file = new->sec_file;
}
else if (new->sec_file) {
/* If we merge, the merge-result must have its own array
*/
conf->sec_file = apr_array_append(a, base->sec_file, new->sec_file);
}
/* Otherwise we simply use the base->sec_file array
*/
if (!conf->sec_if) {
conf->sec_if = new->sec_if;
}
else if (new->sec_if) {
/* If we merge, the merge-result must have its own array
*/
conf->sec_if = apr_array_append(a, base->sec_if, new->sec_if);
}
/* Otherwise we simply use the base->sec_if array
*/
if (new->server_signature != srv_sig_unset) {
conf->server_signature = new->server_signature;
}
if (new->add_default_charset != ADD_DEFAULT_CHARSET_UNSET) {
conf->add_default_charset = new->add_default_charset;
conf->add_default_charset_name = new->add_default_charset_name;
}
/* Overriding all negotiation
*/
if (new->mime_type) {
conf->mime_type = new->mime_type;
}
if (new->handler) {
conf->handler = new->handler;
}
if (new->expr_handler) {
conf->expr_handler = new->expr_handler;
}
if (new->output_filters) {
conf->output_filters = new->output_filters;
}
if (new->input_filters) {
conf->input_filters = new->input_filters;
}
/*
* Now merge the setting of the FileETag directive.
*/
if (new->etag_bits == ETAG_UNSET) {
conf->etag_add =
(conf->etag_add & (~ new->etag_remove)) | new->etag_add;
conf->etag_remove =
(conf->etag_remove & (~ new->etag_add)) | new->etag_remove;
conf->etag_bits =
(conf->etag_bits & (~ conf->etag_remove)) | conf->etag_add;
}
else {
conf->etag_bits = new->etag_bits;
conf->etag_add = new->etag_add;
conf->etag_remove = new->etag_remove;
}
if (conf->etag_bits != ETAG_NONE) {
conf->etag_bits &= (~ ETAG_NONE);
}
if (new->enable_mmap != ENABLE_MMAP_UNSET) {
conf->enable_mmap = new->enable_mmap;
}
if (new->enable_sendfile != ENABLE_SENDFILE_UNSET) {
conf->enable_sendfile = new->enable_sendfile;
}
conf->allow_encoded_slashes = new->allow_encoded_slashes;
conf->decode_encoded_slashes = new->decode_encoded_slashes;
if (new->log) {
if (!conf->log) {
conf->log = new->log;
}
else {
conf->log = ap_new_log_config(a, new->log);
ap_merge_log_config(base->log, conf->log);
}
}
conf->max_ranges = new->max_ranges != AP_MAXRANGES_UNSET ? new->max_ranges : base->max_ranges;
conf->max_overlaps = new->max_overlaps != AP_MAXRANGES_UNSET ? new->max_overlaps : base->max_overlaps;
conf->max_reversals = new->max_reversals != AP_MAXRANGES_UNSET ? new->max_reversals : base->max_reversals;
conf->cgi_pass_auth = new->cgi_pass_auth != AP_CGI_PASS_AUTH_UNSET ? new->cgi_pass_auth : base->cgi_pass_auth;
if (new->cgi_var_rules) {
if (!conf->cgi_var_rules) {
conf->cgi_var_rules = new->cgi_var_rules;
}
else {
conf->cgi_var_rules = apr_hash_overlay(a, new->cgi_var_rules, conf->cgi_var_rules);
}
}
AP_CORE_MERGE_FLAG(qualify_redirect_url, conf, base, new);
return (void*)conf;
}
#if APR_HAS_SO_ACCEPTFILTER
#ifndef ACCEPT_FILTER_NAME
#define ACCEPT_FILTER_NAME "httpready"
#ifdef __FreeBSD_version
#if __FreeBSD_version < 411000 /* httpready broken before 4.1.1 */
#undef ACCEPT_FILTER_NAME
#define ACCEPT_FILTER_NAME "dataready"
#endif
#endif
#endif
#endif
static void *create_core_server_config(apr_pool_t *a, server_rec *s)
{
core_server_config *conf;
int is_virtual = s->is_virtual;
conf = (core_server_config *)apr_pcalloc(a, sizeof(core_server_config));
/* global-default / global-only settings */
if (!is_virtual) {
conf->ap_document_root = DOCUMENT_LOCATION;
conf->access_name = DEFAULT_ACCESS_FNAME;
/* A mapping only makes sense in the global context */
conf->accf_map = apr_table_make(a, 5);
#if APR_HAS_SO_ACCEPTFILTER
apr_table_setn(conf->accf_map, "http", ACCEPT_FILTER_NAME);
apr_table_setn(conf->accf_map, "https", "dataready");
#elif defined(WIN32)
/* 'data' is disabled on Windows due to a DoS vuln (PR 59970) */
apr_table_setn(conf->accf_map, "http", "connect");
apr_table_setn(conf->accf_map, "https", "connect");
#else
apr_table_setn(conf->accf_map, "http", "data");
apr_table_setn(conf->accf_map, "https", "data");
#endif
}
/* pcalloc'ed - we have NULL's/0's
else ** is_virtual ** {
conf->ap_document_root = NULL;
conf->access_name = NULL;
conf->accf_map = NULL;
}
*/
/* initialization, no special case for global context */
conf->sec_dir = apr_array_make(a, 40, sizeof(ap_conf_vector_t *));
conf->sec_url = apr_array_make(a, 40, sizeof(ap_conf_vector_t *));
/* pcalloc'ed - we have NULL's/0's
conf->gprof_dir = NULL;
** recursion stopper; 0 == unset
conf->redirect_limit = 0;
conf->subreq_limit = 0;
conf->protocol = NULL;
*/
conf->trace_enable = AP_TRACE_UNSET;
conf->protocols = apr_array_make(a, 5, sizeof(const char *));
conf->protocols_honor_order = -1;
return (void *)conf;
}
static void *merge_core_server_configs(apr_pool_t *p, void *basev, void *virtv)
{
core_server_config *base = (core_server_config *)basev;
core_server_config *virt = (core_server_config *)virtv;
core_server_config *conf = (core_server_config *)
apr_pmemdup(p, base, sizeof(core_server_config));
if (virt->ap_document_root)
conf->ap_document_root = virt->ap_document_root;
if (virt->access_name)
conf->access_name = virt->access_name;
/* XXX optimize to keep base->sec_ pointers if virt->sec_ array is empty */
conf->sec_dir = apr_array_append(p, base->sec_dir, virt->sec_dir);
conf->sec_url = apr_array_append(p, base->sec_url, virt->sec_url);
if (virt->redirect_limit)
conf->redirect_limit = virt->redirect_limit;
if (virt->subreq_limit)
conf->subreq_limit = virt->subreq_limit;
if (virt->trace_enable != AP_TRACE_UNSET)
conf->trace_enable = virt->trace_enable;
if (virt->http09_enable != AP_HTTP09_UNSET)
conf->http09_enable = virt->http09_enable;
if (virt->http_conformance != AP_HTTP_CONFORMANCE_UNSET)
conf->http_conformance = virt->http_conformance;
if (virt->http_methods != AP_HTTP_METHODS_UNSET)
conf->http_methods = virt->http_methods;
/* no action for virt->accf_map, not allowed per-vhost */
if (virt->protocol)
conf->protocol = virt->protocol;
if (virt->gprof_dir)
conf->gprof_dir = virt->gprof_dir;
if (virt->error_log_format)
conf->error_log_format = virt->error_log_format;
if (virt->error_log_conn)
conf->error_log_conn = virt->error_log_conn;
if (virt->error_log_req)
conf->error_log_req = virt->error_log_req;
conf->merge_trailers = (virt->merge_trailers != AP_MERGE_TRAILERS_UNSET)
? virt->merge_trailers
: base->merge_trailers;
conf->protocols = ((virt->protocols->nelts > 0)?
virt->protocols : base->protocols);
conf->protocols_honor_order = ((virt->protocols_honor_order < 0)?
base->protocols_honor_order :
virt->protocols_honor_order);
return conf;
}
/* Add per-directory configuration entry (for <directory> section);
* these are part of the core server config.
*/
AP_CORE_DECLARE(void) ap_add_per_dir_conf(server_rec *s, void *dir_config)
{
core_server_config *sconf = ap_get_core_module_config(s->module_config);
void **new_space = (void **)apr_array_push(sconf->sec_dir);
*new_space = dir_config;
}
AP_CORE_DECLARE(void) ap_add_per_url_conf(server_rec *s, void *url_config)
{
core_server_config *sconf = ap_get_core_module_config(s->module_config);
void **new_space = (void **)apr_array_push(sconf->sec_url);
*new_space = url_config;
}
AP_CORE_DECLARE(void) ap_add_file_conf(apr_pool_t *p, core_dir_config *conf,
void *url_config)
{
void **new_space;
if (!conf->sec_file)
conf->sec_file = apr_array_make(p, 2, sizeof(ap_conf_vector_t *));
new_space = (void **)apr_array_push(conf->sec_file);
*new_space = url_config;
}
AP_CORE_DECLARE(const char *) ap_add_if_conf(apr_pool_t *p,
core_dir_config *conf,
void *if_config)
{
void **new_space;
core_dir_config *new = ap_get_module_config(if_config, &core_module);
if (!conf->sec_if) {
conf->sec_if = apr_array_make(p, 2, sizeof(ap_conf_vector_t *));
}
if (new->condition_ifelse & AP_CONDITION_ELSE) {
int have_if = 0;
if (conf->sec_if->nelts > 0) {
core_dir_config *last;
ap_conf_vector_t *lastelt = APR_ARRAY_IDX(conf->sec_if,
conf->sec_if->nelts - 1,
ap_conf_vector_t *);
last = ap_get_module_config(lastelt, &core_module);
if (last->condition_ifelse & AP_CONDITION_IF)
have_if = 1;
}
if (!have_if)
return "<Else> or <ElseIf> section without previous <If> or "
"<ElseIf> section in same scope";
}
new_space = (void **)apr_array_push(conf->sec_if);
*new_space = if_config;
return NULL;
}
/* We need to do a stable sort, qsort isn't stable. So to make it stable
* we'll be maintaining the original index into the list, and using it
* as the minor key during sorting. The major key is the number of
* components (where the root component is zero).
*/
struct reorder_sort_rec {
ap_conf_vector_t *elt;
int orig_index;
};
static int reorder_sorter(const void *va, const void *vb)
{
const struct reorder_sort_rec *a = va;
const struct reorder_sort_rec *b = vb;
core_dir_config *core_a;
core_dir_config *core_b;
core_a = ap_get_core_module_config(a->elt);
core_b = ap_get_core_module_config(b->elt);
/* a regex always sorts after a non-regex
*/
if (!core_a->r && core_b->r) {
return -1;
}
else if (core_a->r && !core_b->r) {
return 1;
}
/* we always sort next by the number of components
*/
if (core_a->d_components < core_b->d_components) {
return -1;
}
else if (core_a->d_components > core_b->d_components) {
return 1;
}
/* They have the same number of components, we now have to compare
* the minor key to maintain the original order (from the config.)
*/
return a->orig_index - b->orig_index;
}
void ap_core_reorder_directories(apr_pool_t *p, server_rec *s)
{
core_server_config *sconf;
apr_array_header_t *sec_dir;
struct reorder_sort_rec *sortbin;
int nelts;
ap_conf_vector_t **elts;
int i;
apr_pool_t *tmp;
sconf = ap_get_core_module_config(s->module_config);
sec_dir = sconf->sec_dir;
nelts = sec_dir->nelts;
elts = (ap_conf_vector_t **)sec_dir->elts;
if (!nelts) {
/* simple case of already being sorted... */
/* We're not checking this condition to be fast... we're checking
* it to avoid trying to palloc zero bytes, which can trigger some
* memory debuggers to barf
*/
return;
}
/* we have to allocate tmp space to do a stable sort */
apr_pool_create(&tmp, p);
sortbin = apr_palloc(tmp, sec_dir->nelts * sizeof(*sortbin));
for (i = 0; i < nelts; ++i) {
sortbin[i].orig_index = i;
sortbin[i].elt = elts[i];
}
qsort(sortbin, nelts, sizeof(*sortbin), reorder_sorter);
/* and now copy back to the original array */
for (i = 0; i < nelts; ++i) {
elts[i] = sortbin[i].elt;
}
apr_pool_destroy(tmp);
}
/*****************************************************************
*
* There are some elements of the core config structures in which
* other modules have a legitimate interest (this is ugly, but necessary
* to preserve NCSA back-compatibility). So, we have a bunch of accessors
* here...
*/
AP_DECLARE(int) ap_allow_options(request_rec *r)
{
core_dir_config *conf =
(core_dir_config *)ap_get_core_module_config(r->per_dir_config);
return conf->opts;
}
AP_DECLARE(int) ap_allow_overrides(request_rec *r)
{
core_dir_config *conf;
conf = (core_dir_config *)ap_get_core_module_config(r->per_dir_config);
return conf->override;
}
/*
* Optional function coming from mod_authn_core, used for
* retrieving the type of autorization
*/
static APR_OPTIONAL_FN_TYPE(authn_ap_auth_type) *authn_ap_auth_type;
AP_DECLARE(const char *) ap_auth_type(request_rec *r)
{
if (authn_ap_auth_type) {
return authn_ap_auth_type(r);
}
return NULL;
}
/*
* Optional function coming from mod_authn_core, used for
* retrieving the authorization realm
*/
static APR_OPTIONAL_FN_TYPE(authn_ap_auth_name) *authn_ap_auth_name;
AP_DECLARE(const char *) ap_auth_name(request_rec *r)
{
if (authn_ap_auth_name) {
return authn_ap_auth_name(r);
}
return NULL;
}
/*
* Optional function coming from mod_access_compat, used to determine how
access control interacts with authentication/authorization
*/
static APR_OPTIONAL_FN_TYPE(access_compat_ap_satisfies) *access_compat_ap_satisfies;
AP_DECLARE(int) ap_satisfies(request_rec *r)
{
if (access_compat_ap_satisfies) {
return access_compat_ap_satisfies(r);
}
return SATISFY_NOSPEC;
}
AP_DECLARE(const char *) ap_document_root(request_rec *r) /* Don't use this! */
{
core_server_config *sconf;
core_request_config *rconf = ap_get_core_module_config(r->request_config);
if (rconf->document_root)
return rconf->document_root;
sconf = ap_get_core_module_config(r->server->module_config);
return sconf->ap_document_root;
}
AP_DECLARE(const char *) ap_context_prefix(request_rec *r)
{
core_request_config *conf = ap_get_core_module_config(r->request_config);
if (conf->context_prefix)
return conf->context_prefix;
else
return "";
}
AP_DECLARE(const char *) ap_context_document_root(request_rec *r)
{
core_request_config *conf = ap_get_core_module_config(r->request_config);
if (conf->context_document_root)
return conf->context_document_root;
else
return ap_document_root(r);
}
AP_DECLARE(void) ap_set_document_root(request_rec *r, const char *document_root)
{
core_request_config *conf = ap_get_core_module_config(r->request_config);
conf->document_root = document_root;
}
AP_DECLARE(void) ap_set_context_info(request_rec *r, const char *context_prefix,
const char *context_document_root)
{
core_request_config *conf = ap_get_core_module_config(r->request_config);
if (context_prefix)
conf->context_prefix = context_prefix;
if (context_document_root)
conf->context_document_root = context_document_root;
}
/* Should probably just get rid of this... the only code that cares is
* part of the core anyway (and in fact, it isn't publicised to other
* modules).
*/
char *ap_response_code_string(request_rec *r, int error_index)
{
core_dir_config *dirconf;
core_request_config *reqconf = ap_get_core_module_config(r->request_config);
const char *err;
const char *response;
ap_expr_info_t *expr;
/* check for string registered via ap_custom_response() first */
if (reqconf->response_code_strings != NULL
&& reqconf->response_code_strings[error_index] != NULL) {
return reqconf->response_code_strings[error_index];
}
/* check for string specified via ErrorDocument */
dirconf = ap_get_core_module_config(r->per_dir_config);
if (!dirconf->response_code_exprs) {
return NULL;
}
expr = apr_hash_get(dirconf->response_code_exprs, &error_index,
sizeof(error_index));
if (!expr) {
return NULL;
}
/* special token to indicate revert back to default */
if ((char *) expr == &errordocument_default) {
return NULL;
}
err = NULL;
response = ap_expr_str_exec(r, expr, &err);
if (err) {
ap_log_rerror(
APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(02841) "core: ErrorDocument: can't "
"evaluate require expression: %s", err);
return NULL;
}
/* alas, duplication required as we return not-const */
return apr_pstrdup(r->pool, response);
}
/* Code from Harald Hanche-Olsen <hanche@imf.unit.no> */
static APR_INLINE int do_double_reverse (int double_reverse,
const char *remote_host,
apr_sockaddr_t *client_addr,
apr_pool_t *pool)
{
apr_sockaddr_t *sa;
apr_status_t rv;
if (double_reverse) {
/* already done */
return double_reverse;
}
if (remote_host == NULL || remote_host[0] == '\0') {
/* single reverse failed, so don't bother */
return -1;
}
rv = apr_sockaddr_info_get(&sa, remote_host, APR_UNSPEC, 0, 0, pool);
if (rv == APR_SUCCESS) {
while (sa) {
if (apr_sockaddr_equal(sa, client_addr)) {
return 1;
}
sa = sa->next;
}
}
return -1;
}
AP_DECLARE(const char *) ap_get_remote_host(conn_rec *conn, void *dir_config,
int type, int *str_is_ip)
{
int hostname_lookups;
int ignored_str_is_ip;
if (!str_is_ip) { /* caller doesn't want to know */
str_is_ip = &ignored_str_is_ip;
}
*str_is_ip = 0;
/* If we haven't checked the host name, and we want to */
if (dir_config) {
hostname_lookups = ((core_dir_config *)ap_get_core_module_config(dir_config))
->hostname_lookups;
if (hostname_lookups == HOSTNAME_LOOKUP_UNSET) {
hostname_lookups = HOSTNAME_LOOKUP_OFF;
}
}
else {
/* the default */
hostname_lookups = HOSTNAME_LOOKUP_OFF;
}
if (type != REMOTE_NOLOOKUP
&& conn->remote_host == NULL
&& (type == REMOTE_DOUBLE_REV
|| hostname_lookups != HOSTNAME_LOOKUP_OFF)) {
if (apr_getnameinfo(&conn->remote_host, conn->client_addr, 0)
== APR_SUCCESS) {
ap_str_tolower(conn->remote_host);
if (hostname_lookups == HOSTNAME_LOOKUP_DOUBLE) {
conn->double_reverse = do_double_reverse(conn->double_reverse,
conn->remote_host,
conn->client_addr,
conn->pool);
if (conn->double_reverse != 1) {
conn->remote_host = NULL;
}
}
}
/* if failed, set it to the NULL string to indicate error */
if (conn->remote_host == NULL) {
conn->remote_host = "";
}
}
if (type == REMOTE_DOUBLE_REV) {
conn->double_reverse = do_double_reverse(conn->double_reverse,
conn->remote_host,
conn->client_addr, conn->pool);
if (conn->double_reverse == -1) {
return NULL;
}
}
/*
* Return the desired information; either the remote DNS name, if found,
* or either NULL (if the hostname was requested) or the IP address
* (if any identifier was requested).
*/
if (conn->remote_host != NULL && conn->remote_host[0] != '\0') {
return conn->remote_host;
}
else {
if (type == REMOTE_HOST || type == REMOTE_DOUBLE_REV) {
return NULL;
}
else {
*str_is_ip = 1;
return conn->client_ip;
}
}
}
AP_DECLARE(const char *) ap_get_useragent_host(request_rec *r,
int type, int *str_is_ip)
{
conn_rec *conn = r->connection;
int hostname_lookups;
int ignored_str_is_ip;
/* Guard here when examining the host before the read_request hook
* has populated an r->useragent_addr
*/
if (!r->useragent_addr || (r->useragent_addr == conn->client_addr)) {
return ap_get_remote_host(conn, r->per_dir_config, type, str_is_ip);
}
if (!str_is_ip) { /* caller doesn't want to know */
str_is_ip = &ignored_str_is_ip;
}