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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.
+ */
+
+/*
+ * @file request.c
+ * @brief functions to get and process requests
+ *
+ * @author Rob McCool 3/21/93
+ *
+ * Thoroughly revamped by rst for Apache. NB this file reads
+ * best from the bottom up.
+ *
+ */
+
+#include "apr_strings.h"
+#include "apr_file_io.h"
+#include "apr_fnmatch.h"
+
+#define APR_WANT_STRFUNC
+#include "apr_want.h"
+
+#include "ap_config.h"
+#include "ap_provider.h"
+#include "httpd.h"
+#include "http_config.h"
+#include "http_request.h"
+#include "http_core.h"
+#include "http_protocol.h"
+#include "http_log.h"
+#include "http_main.h"
+#include "util_filter.h"
+#include "util_charset.h"
+#include "util_script.h"
+#include "ap_expr.h"
+#include "mod_request.h"
+
+#include "mod_core.h"
+#include "mod_auth.h"
+
+#if APR_HAVE_STDARG_H
+#include <stdarg.h>
+#endif
+
+/* we know core's module_index is 0 */
+#undef APLOG_MODULE_INDEX
+#define APLOG_MODULE_INDEX AP_CORE_MODULE_INDEX
+
+APR_HOOK_STRUCT(
+ APR_HOOK_LINK(pre_translate_name)
+ APR_HOOK_LINK(translate_name)
+ APR_HOOK_LINK(map_to_storage)
+ APR_HOOK_LINK(check_user_id)
+ APR_HOOK_LINK(fixups)
+ APR_HOOK_LINK(type_checker)
+ APR_HOOK_LINK(access_checker)
+ APR_HOOK_LINK(access_checker_ex)
+ APR_HOOK_LINK(auth_checker)
+ APR_HOOK_LINK(insert_filter)
+ APR_HOOK_LINK(create_request)
+ APR_HOOK_LINK(post_perdir_config)
+ APR_HOOK_LINK(dirwalk_stat)
+ APR_HOOK_LINK(force_authn)
+)
+
+AP_IMPLEMENT_HOOK_RUN_FIRST(int,pre_translate_name,
+ (request_rec *r), (r), DECLINED)
+AP_IMPLEMENT_HOOK_RUN_FIRST(int,translate_name,
+ (request_rec *r), (r), DECLINED)
+AP_IMPLEMENT_HOOK_RUN_FIRST(int,map_to_storage,
+ (request_rec *r), (r), DECLINED)
+AP_IMPLEMENT_HOOK_RUN_FIRST(int,check_user_id,
+ (request_rec *r), (r), DECLINED)
+AP_IMPLEMENT_HOOK_RUN_ALL(int,fixups,
+ (request_rec *r), (r), OK, DECLINED)
+AP_IMPLEMENT_HOOK_RUN_FIRST(int,type_checker,
+ (request_rec *r), (r), DECLINED)
+AP_IMPLEMENT_HOOK_RUN_ALL(int,access_checker,
+ (request_rec *r), (r), OK, DECLINED)
+AP_IMPLEMENT_HOOK_RUN_FIRST(int,access_checker_ex,
+ (request_rec *r), (r), DECLINED)
+AP_IMPLEMENT_HOOK_RUN_FIRST(int,auth_checker,
+ (request_rec *r), (r), DECLINED)
+AP_IMPLEMENT_HOOK_VOID(insert_filter, (request_rec *r), (r))
+AP_IMPLEMENT_HOOK_RUN_ALL(int, create_request,
+ (request_rec *r), (r), OK, DECLINED)
+AP_IMPLEMENT_HOOK_RUN_ALL(int, post_perdir_config,
+ (request_rec *r), (r), OK, DECLINED)
+AP_IMPLEMENT_HOOK_RUN_FIRST(apr_status_t,dirwalk_stat,
+ (apr_finfo_t *finfo, request_rec *r, apr_int32_t wanted),
+ (finfo, r, wanted), AP_DECLINED)
+AP_IMPLEMENT_HOOK_RUN_FIRST(int,force_authn,
+ (request_rec *r), (r), DECLINED)
+
+static int auth_internal_per_conf = 0;
+static int auth_internal_per_conf_hooks = 0;
+static int auth_internal_per_conf_providers = 0;
+
+
+static int decl_die(int status, const char *phase, request_rec *r)
+{
+ if (status == DECLINED) {
+ ap_log_rerror(APLOG_MARK, APLOG_CRIT, 0, r, APLOGNO(00025)
+ "configuration error: couldn't %s: %s", phase, r->uri);
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+ else {
+ ap_log_rerror(APLOG_MARK, APLOG_TRACE3, 0, r,
+ "auth phase '%s' gave status %d: %s", phase,
+ status, r->uri);
+ return status;
+ }
+}
+
+AP_DECLARE(int) ap_some_authn_required(request_rec *r)
+{
+ int access_status;
+ char *olduser = r->user;
+ int rv = FALSE;
+
+ switch (ap_satisfies(r)) {
+ case SATISFY_ALL:
+ case SATISFY_NOSPEC:
+ if ((access_status = ap_run_access_checker(r)) != OK) {
+ break;
+ }
+
+ access_status = ap_run_access_checker_ex(r);
+ if (access_status == DECLINED) {
+ rv = TRUE;
+ }
+
+ break;
+ case SATISFY_ANY:
+ if ((access_status = ap_run_access_checker(r)) == OK) {
+ break;
+ }
+
+ access_status = ap_run_access_checker_ex(r);
+ if (access_status == DECLINED) {
+ rv = TRUE;
+ }
+
+ break;
+ }
+
+ r->user = olduser;
+ return rv;
+}
+
+static int walk_location_and_if(request_rec *r)
+{
+ int access_status;
+ core_dir_config *d;
+
+ if ((access_status = ap_location_walk(r))) {
+ return access_status;
+ }
+ if ((access_status = ap_if_walk(r))) {
+ return access_status;
+ }
+
+ d = ap_get_core_module_config(r->per_dir_config);
+ if (d->log)
+ r->log = d->log;
+
+ return OK;
+}
+
+/* This is the master logic for processing requests. Do NOT duplicate
+ * this logic elsewhere, or the security model will be broken by future
+ * API changes. Each phase must be individually optimized to pick up
+ * redundant/duplicate calls by subrequests, and redirects.
+ */
+AP_DECLARE(int) ap_process_request_internal(request_rec *r)
+{
+ int access_status = DECLINED;
+ int file_req = (r->main && r->filename);
+ core_server_config *sconf =
+ ap_get_core_module_config(r->server->module_config);
+ unsigned int normalize_flags;
+
+ normalize_flags = AP_NORMALIZE_NOT_ABOVE_ROOT;
+ if (sconf->merge_slashes != AP_CORE_CONFIG_OFF) {
+ normalize_flags |= AP_NORMALIZE_MERGE_SLASHES;
+ }
+ if (file_req) {
+ /* File subrequests can have a relative path. */
+ normalize_flags |= AP_NORMALIZE_ALLOW_RELATIVE;
+ }
+
+ if (r->parsed_uri.path) {
+ /* Normalize: remove /./ and shrink /../ segments, plus
+ * decode unreserved chars (first time only to avoid
+ * double decoding after ap_unescape_url() below).
+ */
+ if (!ap_normalize_path(r->parsed_uri.path,
+ normalize_flags |
+ AP_NORMALIZE_DECODE_UNRESERVED)) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(10244)
+ "invalid URI path (%s)", r->unparsed_uri);
+ return HTTP_BAD_REQUEST;
+ }
+ }
+
+ /* All file subrequests are a huge pain... they cannot bubble through the
+ * next several steps. Only file subrequests are allowed an empty uri,
+ * otherwise let (pre_)translate_name kill the request.
+ */
+ if (!file_req) {
+ ap_conf_vector_t *per_dir_config = r->per_dir_config;
+
+ if ((access_status = walk_location_and_if(r))) {
+ return access_status;
+ }
+
+ /* Let pre_translate_name hooks work with non-decoded URIs, and
+ * eventually prevent further URI transformations (return DONE).
+ */
+ access_status = ap_run_pre_translate_name(r);
+ if (ap_is_HTTP_ERROR(access_status)) {
+ return access_status;
+ }
+
+ /* Throw away pre_trans only merging */
+ r->per_dir_config = per_dir_config;
+ }
+
+ /* Ignore URL unescaping for translated URIs already */
+ if (access_status != DONE && r->parsed_uri.path) {
+ core_dir_config *d = ap_get_core_module_config(r->per_dir_config);
+ /* Unreserved chars were already decoded by ap_normalize_path() */
+ unsigned int unescape_flags = AP_UNESCAPE_URL_KEEP_UNRESERVED;
+ if (!d->allow_encoded_slashes) {
+ unescape_flags |= AP_UNESCAPE_URL_FORBID_SLASHES;
+ }
+ else if (!d->decode_encoded_slashes) {
+ unescape_flags |= AP_UNESCAPE_URL_KEEP_SLASHES;
+ }
+ access_status = ap_unescape_url_ex(r->parsed_uri.path, unescape_flags);
+ if (access_status) {
+ if (access_status == HTTP_NOT_FOUND) {
+ if (! d->allow_encoded_slashes) {
+ ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00026)
+ "found %%2f (encoded '/') in URI path (%s), "
+ "returning 404", r->unparsed_uri);
+ }
+ }
+ return access_status;
+ }
+
+ if (d->allow_encoded_slashes && d->decode_encoded_slashes) {
+ /* Decoding slashes might have created new // or /./ or /../
+ * segments (e.g. "/.%2F/"), so re-normalize.
+ */
+ ap_normalize_path(r->parsed_uri.path, normalize_flags);
+ }
+ }
+
+ /* Same, translate_name is not suited for file subrequests */
+ if (!file_req) {
+ if ((access_status = walk_location_and_if(r))) {
+ return access_status;
+ }
+
+ if ((access_status = ap_run_translate_name(r))) {
+ return decl_die(access_status, "translate", r);
+ }
+ }
+
+ /* Reset to the server default config prior to running map_to_storage
+ */
+ r->per_dir_config = r->server->lookup_defaults;
+
+ if ((access_status = ap_run_map_to_storage(r))) {
+ /* This request wasn't in storage (e.g. TRACE) */
+ return access_status;
+ }
+
+ /* Rerun the location walk, which overrides any map_to_storage config.
+ */
+ if ((access_status = walk_location_and_if(r))) {
+ return access_status;
+ }
+
+ if ((access_status = ap_run_post_perdir_config(r))) {
+ return access_status;
+ }
+
+ /* Only on the main request! */
+ if (r->main == NULL) {
+ if ((access_status = ap_run_header_parser(r))) {
+ return access_status;
+ }
+ }
+
+ /* Skip authn/authz if the parent or prior request passed the authn/authz,
+ * and that configuration didn't change (this requires optimized _walk()
+ * functions in map_to_storage that use the same merge results given
+ * identical input.) If the config changes, we must re-auth.
+ */
+ if (r->prev && (r->prev->per_dir_config == r->per_dir_config)) {
+ r->user = r->prev->user;
+ r->ap_auth_type = r->prev->ap_auth_type;
+ }
+ else if (r->main && (r->main->per_dir_config == r->per_dir_config)) {
+ r->user = r->main->user;
+ r->ap_auth_type = r->main->ap_auth_type;
+ }
+ else {
+ /* A module using a confusing API (ap_get_basic_auth_pw) caused
+ ** r->user to be filled out prior to check_authn hook. We treat
+ ** it is inadvertent.
+ */
+ if (r->user && apr_table_get(r->notes, AP_GET_BASIC_AUTH_PW_NOTE)) {
+ r->user = NULL;
+ }
+
+ switch (ap_satisfies(r)) {
+ case SATISFY_ALL:
+ case SATISFY_NOSPEC:
+ if ((access_status = ap_run_access_checker(r)) != OK) {
+ return decl_die(access_status,
+ "check access (with Satisfy All)", r);
+ }
+
+ access_status = ap_run_access_checker_ex(r);
+ if (access_status == DECLINED
+ || (access_status == OK && ap_run_force_authn(r) == OK)) {
+ if ((access_status = ap_run_check_user_id(r)) != OK) {
+ return decl_die(access_status, "check user", r);
+ }
+ if (r->user == NULL) {
+ /* don't let buggy authn module crash us in authz */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00027)
+ "No authentication done but request not "
+ "allowed without authentication for %s. "
+ "Authentication not configured?",
+ r->uri);
+ access_status = HTTP_INTERNAL_SERVER_ERROR;
+ return decl_die(access_status, "check user", r);
+ }
+ if ((access_status = ap_run_auth_checker(r)) != OK) {
+ return decl_die(access_status, "check authorization", r);
+ }
+ }
+ else if (access_status == OK) {
+ ap_log_rerror(APLOG_MARK, APLOG_TRACE3, 0, r,
+ "request authorized without authentication by "
+ "access_checker_ex hook: %s", r->uri);
+ }
+ else {
+ return decl_die(access_status, "check access", r);
+ }
+ break;
+ case SATISFY_ANY:
+ if ((access_status = ap_run_access_checker(r)) == OK) {
+ ap_log_rerror(APLOG_MARK, APLOG_TRACE3, 0, r,
+ "request authorized without authentication by "
+ "access_checker hook and 'Satisfy any': %s",
+ r->uri);
+ break;
+ }
+
+ access_status = ap_run_access_checker_ex(r);
+ if (access_status == DECLINED
+ || (access_status == OK && ap_run_force_authn(r) == OK)) {
+ if ((access_status = ap_run_check_user_id(r)) != OK) {
+ return decl_die(access_status, "check user", r);
+ }
+ if (r->user == NULL) {
+ /* don't let buggy authn module crash us in authz */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00028)
+ "No authentication done but request not "
+ "allowed without authentication for %s. "
+ "Authentication not configured?",
+ r->uri);
+ access_status = HTTP_INTERNAL_SERVER_ERROR;
+ return decl_die(access_status, "check user", r);
+ }
+ if ((access_status = ap_run_auth_checker(r)) != OK) {
+ return decl_die(access_status, "check authorization", r);
+ }
+ }
+ else if (access_status == OK) {
+ ap_log_rerror(APLOG_MARK, APLOG_TRACE3, 0, r,
+ "request authorized without authentication by "
+ "access_checker_ex hook: %s", r->uri);
+ }
+ else {
+ return decl_die(access_status, "check access", r);
+ }
+ break;
+ }
+ }
+ /* XXX Must make certain the ap_run_type_checker short circuits mime
+ * in mod-proxy for r->proxyreq && r->parsed_uri.scheme
+ * && !strcmp(r->parsed_uri.scheme, "http")
+ */
+ if ((access_status = ap_run_type_checker(r)) != OK) {
+ return decl_die(access_status, "find types", r);
+ }
+
+ if ((access_status = ap_run_fixups(r)) != OK) {
+ ap_log_rerror(APLOG_MARK, APLOG_TRACE3, 0, r, "fixups hook gave %d: %s",
+ access_status, r->uri);
+ return access_status;
+ }
+
+ return OK;
+}
+
+
+/* Useful caching structures to repeat _walk/merge sequences as required
+ * when a subrequest or redirect reuses substantially the same config.
+ *
+ * Directive order in the httpd.conf file and its Includes significantly
+ * impact this optimization. Grouping common blocks at the front of the
+ * config that are less likely to change between a request and
+ * its subrequests, or between a request and its redirects reduced
+ * the work of these functions significantly.
+ */
+
+typedef struct walk_walked_t {
+ ap_conf_vector_t *matched; /* A dir_conf sections we matched */
+ ap_conf_vector_t *merged; /* The dir_conf merged result */
+} walk_walked_t;
+
+typedef struct walk_cache_t {
+ const char *cached; /* The identifier we matched */
+ ap_conf_vector_t **dir_conf_tested; /* The sections we matched against */
+ ap_conf_vector_t *dir_conf_merged; /* Base per_dir_config */
+ ap_conf_vector_t *per_dir_result; /* per_dir_config += walked result */
+ apr_array_header_t *walked; /* The list of walk_walked_t results */
+ struct walk_cache_t *prev; /* Prev cache of same call in this (sub)req */
+ int count; /* Number of prev invocations of same call in this (sub)req */
+} walk_cache_t;
+
+static walk_cache_t *prep_walk_cache(apr_size_t t, request_rec *r)
+{
+ void **note, **inherit_note;
+ walk_cache_t *cache, *prev_cache, *copy_cache;
+ int count;
+
+ /* Find the most relevant, recent walk cache to work from and provide
+ * a copy the caller is allowed to munge. In the case of a sub-request
+ * or internal redirect, this is the cache corresponding to the equivalent
+ * invocation of the same function call in the "parent" request, if such
+ * a cache exists. Otherwise it is the walk cache of the previous
+ * invocation of the same function call in the current request, if
+ * that exists; if not, then create a new walk cache.
+ */
+ note = ap_get_request_note(r, t);
+ AP_DEBUG_ASSERT(note != NULL);
+
+ copy_cache = prev_cache = *note;
+ count = prev_cache ? (prev_cache->count + 1) : 0;
+
+ if ((r->prev
+ && (inherit_note = ap_get_request_note(r->prev, t))
+ && *inherit_note)
+ || (r->main
+ && (inherit_note = ap_get_request_note(r->main, t))
+ && *inherit_note)) {
+ walk_cache_t *inherit_cache = *inherit_note;
+
+ while (inherit_cache->count > count) {
+ inherit_cache = inherit_cache->prev;
+ }
+ if (inherit_cache->count == count) {
+ copy_cache = inherit_cache;
+ }
+ }
+
+ if (copy_cache) {
+ cache = apr_pmemdup(r->pool, copy_cache, sizeof(*cache));
+ cache->walked = apr_array_copy(r->pool, cache->walked);
+ cache->prev = prev_cache;
+ cache->count = count;
+ }
+ else {
+ cache = apr_pcalloc(r->pool, sizeof(*cache));
+ cache->walked = apr_array_make(r->pool, 4, sizeof(walk_walked_t));
+ }
+
+ *note = cache;
+
+ return cache;
+}
+
+/*****************************************************************
+ *
+ * Getting and checking directory configuration. Also checks the
+ * FollowSymlinks and FollowSymOwner stuff, since this is really the
+ * only place that can happen (barring a new mid_dir_walk callout).
+ *
+ * We can't do it as an access_checker module function which gets
+ * called with the final per_dir_config, since we could have a directory
+ * with FollowSymLinks disabled, which contains a symlink to another
+ * with a .htaccess file which turns FollowSymLinks back on --- and
+ * access in such a case must be denied. So, whatever it is that
+ * checks FollowSymLinks needs to know the state of the options as
+ * they change, all the way down.
+ */
+
+
+/*
+ * resolve_symlink must _always_ be called on an APR_LNK file type!
+ * It will resolve the actual target file type, modification date, etc,
+ * and provide any processing required for symlink evaluation.
+ * Path must already be cleaned, no trailing slash, no multi-slashes,
+ * and don't call this on the root!
+ *
+ * Simply, the number of times we deref a symlink are minimal compared
+ * to the number of times we had an extra lstat() since we 'weren't sure'.
+ *
+ * To optimize, we stat() anything when given (opts & OPT_SYM_LINKS), otherwise
+ * we start off with an lstat(). Every lstat() must be dereferenced in case
+ * it points at a 'nasty' - we must always rerun check_safe_file (or similar.)
+ */
+static int resolve_symlink(char *d, apr_finfo_t *lfi, int opts, apr_pool_t *p)
+{
+ apr_finfo_t fi;
+ const char *savename;
+
+ if (!(opts & (OPT_SYM_OWNER | OPT_SYM_LINKS))) {
+ return HTTP_FORBIDDEN;
+ }
+
+ /* Save the name from the valid bits. */
+ savename = (lfi->valid & APR_FINFO_NAME) ? lfi->name : NULL;
+
+ /* if OPT_SYM_OWNER is unset, we only need to check target accessible */
+ if (!(opts & OPT_SYM_OWNER)) {
+ if (apr_stat(&fi, d, lfi->valid & ~(APR_FINFO_NAME | APR_FINFO_LINK), p)
+ != APR_SUCCESS)
+ {
+ return HTTP_FORBIDDEN;
+ }
+
+ /* Give back the target */
+ memcpy(lfi, &fi, sizeof(fi));
+ if (savename) {
+ lfi->name = savename;
+ lfi->valid |= APR_FINFO_NAME;
+ }
+
+ return OK;
+ }
+
+ /* OPT_SYM_OWNER only works if we can get the owner of
+ * both the file and symlink. First fill in a missing
+ * owner of the symlink, then get the info of the target.
+ */
+ if (!(lfi->valid & APR_FINFO_OWNER)) {
+ if (apr_stat(lfi, d, lfi->valid | APR_FINFO_LINK | APR_FINFO_OWNER, p)
+ != APR_SUCCESS)
+ {
+ return HTTP_FORBIDDEN;
+ }
+ }
+
+ if (apr_stat(&fi, d, lfi->valid & ~(APR_FINFO_NAME), p) != APR_SUCCESS) {
+ return HTTP_FORBIDDEN;
+ }
+
+ if (apr_uid_compare(fi.user, lfi->user) != APR_SUCCESS) {
+ return HTTP_FORBIDDEN;
+ }
+
+ /* Give back the target */
+ memcpy(lfi, &fi, sizeof(fi));
+ if (savename) {
+ lfi->name = savename;
+ lfi->valid |= APR_FINFO_NAME;
+ }
+
+ return OK;
+}
+
+
+/*
+ * As we walk the directory configuration, the merged config won't
+ * be 'rooted' to a specific vhost until the very end of the merge.
+ *
+ * We need a very fast mini-merge to a real, vhost-rooted merge
+ * of core.opts and core.override, the only options tested within
+ * directory_walk itself.
+ *
+ * See core.c::merge_core_dir_configs() for explanation.
+ */
+
+typedef struct core_opts_t {
+ allow_options_t opts;
+ allow_options_t add;
+ allow_options_t remove;
+ overrides_t override;
+ overrides_t override_opts;
+ apr_table_t *override_list;
+} core_opts_t;
+
+static void core_opts_merge(const ap_conf_vector_t *sec, core_opts_t *opts)
+{
+ core_dir_config *this_dir = ap_get_core_module_config(sec);
+
+ if (!this_dir) {
+ return;
+ }
+
+ if (this_dir->opts & OPT_UNSET) {
+ opts->add = (opts->add & ~this_dir->opts_remove)
+ | this_dir->opts_add;
+ opts->remove = (opts->remove & ~this_dir->opts_add)
+ | this_dir->opts_remove;
+ opts->opts = (opts->opts & ~opts->remove) | opts->add;
+ }
+ else {
+ opts->opts = this_dir->opts;
+ opts->add = this_dir->opts_add;
+ opts->remove = this_dir->opts_remove;
+ }
+
+ if (!(this_dir->override & OR_UNSET)) {
+ opts->override = this_dir->override;
+ opts->override_opts = this_dir->override_opts;
+ }
+
+ if (this_dir->override_list != NULL) {
+ opts->override_list = this_dir->override_list;
+ }
+}
+
+
+/*****************************************************************
+ *
+ * Getting and checking directory configuration. Also checks the
+ * FollowSymlinks and FollowSymOwner stuff, since this is really the
+ * only place that can happen (barring a new mid_dir_walk callout).
+ *
+ * We can't do it as an access_checker module function which gets
+ * called with the final per_dir_config, since we could have a directory
+ * with FollowSymLinks disabled, which contains a symlink to another
+ * with a .htaccess file which turns FollowSymLinks back on --- and
+ * access in such a case must be denied. So, whatever it is that
+ * checks FollowSymLinks needs to know the state of the options as
+ * they change, all the way down.
+ */
+
+AP_DECLARE(int) ap_directory_walk(request_rec *r)
+{
+ ap_conf_vector_t *now_merged = NULL;
+ core_server_config *sconf =
+ ap_get_core_module_config(r->server->module_config);
+ ap_conf_vector_t **sec_ent = (ap_conf_vector_t **) sconf->sec_dir->elts;
+ int num_sec = sconf->sec_dir->nelts;
+ walk_cache_t *cache;
+ char *entry_dir;
+ apr_status_t rv;
+ int cached;
+
+ /* XXX: Better (faster) tests needed!!!
+ *
+ * "OK" as a response to a real problem is not _OK_, but to allow broken
+ * modules to proceed, we will permit the not-a-path filename to pass the
+ * following two tests. This behavior may be revoked in future versions
+ * of Apache. We still must catch it later if it's heading for the core
+ * handler. Leave INFO notes here for module debugging.
+ */
+ if (r->filename == NULL) {
+ ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00029)
+ "Module bug? Request filename is missing for URI %s",
+ r->uri);
+ return OK;
+ }
+
+ /* Canonicalize the file path without resolving filename case or aliases
+ * so we can begin by checking the cache for a recent directory walk.
+ * This call will ensure we have an absolute path in the same pass.
+ */
+ if ((rv = apr_filepath_merge(&entry_dir, NULL, r->filename,
+ APR_FILEPATH_NOTRELATIVE, r->pool))
+ != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_INFO, 0, r, APLOGNO(00030)
+ "Module bug? Request filename path %s is invalid or "
+ "or not absolute for uri %s",
+ r->filename, r->uri);
+ return OK;
+ }
+
+ /* XXX Notice that this forces path_info to be canonical. That might
+ * not be desired by all apps. However, some of those same apps likely
+ * have significant security holes.
+ */
+ r->filename = entry_dir;
+
+ cache = prep_walk_cache(AP_NOTE_DIRECTORY_WALK, r);
+ cached = (cache->cached != NULL);
+
+ /* If this is not a dirent subrequest with a preconstructed
+ * r->finfo value, then we can simply stat the filename to
+ * save burning mega-cycles with unneeded stats - if this is
+ * an exact file match. We don't care about failure... we
+ * will stat by component failing this meager attempt.
+ *
+ * It would be nice to distinguish APR_ENOENT from other
+ * types of failure, such as APR_ENOTDIR. We can do something
+ * with APR_ENOENT, knowing that the path is good.
+ */
+ if (r->finfo.filetype == APR_NOFILE || r->finfo.filetype == APR_LNK) {
+ rv = ap_run_dirwalk_stat(&r->finfo, r, APR_FINFO_MIN);
+
+ /* some OSs will return APR_SUCCESS/APR_REG if we stat
+ * a regular file but we have '/' at the end of the name;
+ *
+ * other OSs will return APR_ENOTDIR for that situation;
+ *
+ * handle it the same everywhere by simulating a failure
+ * if it looks like a directory but really isn't
+ *
+ * Also reset if the stat failed, just for safety.
+ */
+ if ((rv != APR_SUCCESS) ||
+ (r->finfo.filetype != APR_NOFILE &&
+ (r->finfo.filetype != APR_DIR) &&
+ (r->filename[strlen(r->filename) - 1] == '/'))) {
+ r->finfo.filetype = APR_NOFILE; /* forget what we learned */
+ }
+ }
+
+ if (r->finfo.filetype == APR_REG) {
+ entry_dir = ap_make_dirstr_parent(r->pool, entry_dir);
+ }
+ else if (r->filename[strlen(r->filename) - 1] != '/') {
+ entry_dir = apr_pstrcat(r->pool, r->filename, "/", NULL);
+ }
+
+ /* If we have a file already matches the path of r->filename,
+ * and the vhost's list of directory sections hasn't changed,
+ * we can skip rewalking the directory_walk entries.
+ */
+ if (cached
+ && ((r->finfo.filetype == APR_REG)
+ || ((r->finfo.filetype == APR_DIR)
+ && (!r->path_info || !*r->path_info)))
+ && (cache->dir_conf_tested == sec_ent)
+ && (strcmp(entry_dir, cache->cached) == 0)) {
+ int familiar = 0;
+
+ /* Well this looks really familiar! If our end-result (per_dir_result)
+ * didn't change, we have absolutely nothing to do :)
+ * Otherwise (as is the case with most dir_merged/file_merged requests)
+ * we must merge our dir_conf_merged onto this new r->per_dir_config.
+ */
+ if (r->per_dir_config == cache->per_dir_result) {
+ familiar = 1;
+ }
+
+ if (r->per_dir_config == cache->dir_conf_merged) {
+ r->per_dir_config = cache->per_dir_result;
+ familiar = 1;
+ }
+
+ if (familiar) {
+ apr_finfo_t thisinfo;
+ int res;
+ allow_options_t opts;
+ core_dir_config *this_dir;
+
+ this_dir = ap_get_core_module_config(r->per_dir_config);
+ opts = this_dir->opts;
+ /*
+ * If Symlinks are allowed in general we do not need the following
+ * check.
+ */
+ if (!(opts & OPT_SYM_LINKS)) {
+ rv = ap_run_dirwalk_stat(&thisinfo, r,
+ APR_FINFO_MIN | APR_FINFO_NAME | APR_FINFO_LINK);
+ /*
+ * APR_INCOMPLETE is as fine as result as APR_SUCCESS as we
+ * have added APR_FINFO_NAME to the wanted parameter of
+ * apr_stat above. On Unix platforms this means that apr_stat
+ * is always going to return APR_INCOMPLETE in the case that
+ * the call to the native stat / lstat did not fail.
+ */
+ if ((rv != APR_INCOMPLETE) && (rv != APR_SUCCESS)) {
+ /*
+ * This should never happen, because we did a stat on the
+ * same file, resolving a possible symlink several lines
+ * above. Therefore do not make a detailed analysis of rv
+ * in this case for the reason of the failure, just bail out
+ * with a HTTP_FORBIDDEN in case we hit a race condition
+ * here.
+ */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(00031)
+ "access to %s failed; stat of '%s' failed.",
+ r->uri, r->filename);
+ return r->status = HTTP_FORBIDDEN;
+ }
+ if (thisinfo.filetype == APR_LNK) {
+ /* Is this a possibly acceptable symlink? */
+ if ((res = resolve_symlink(r->filename, &thisinfo,
+ opts, r->pool)) != OK) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00032)
+ "Symbolic link not allowed "
+ "or link target not accessible: %s",
+ r->filename);
+ return r->status = res;
+ }
+ }
+ }
+ return OK;
+ }
+
+ if (cache->walked->nelts) {
+ now_merged = ((walk_walked_t*)cache->walked->elts)
+ [cache->walked->nelts - 1].merged;
+ }
+ }
+ else {
+ /* We start now_merged from NULL since we want to build
+ * a locations list that can be merged to any vhost.
+ */
+ int sec_idx;
+ int matches = cache->walked->nelts;
+ int cached_matches = matches;
+ walk_walked_t *last_walk = (walk_walked_t*)cache->walked->elts;
+ core_dir_config *this_dir;
+ core_opts_t opts;
+ apr_finfo_t thisinfo;
+ char *save_path_info;
+ apr_size_t buflen;
+ char *buf;
+ unsigned int seg, startseg;
+ apr_pool_t *rxpool = NULL;
+
+ /* Invariant: from the first time filename_len is set until
+ * it goes out of scope, filename_len==strlen(r->filename)
+ */
+ apr_size_t filename_len;
+#ifdef CASE_BLIND_FILESYSTEM
+ apr_size_t canonical_len;
+#endif
+
+ cached &= auth_internal_per_conf;
+
+ /*
+ * We must play our own mini-merge game here, for the few
+ * running dir_config values we care about within dir_walk.
+ * We didn't start the merge from r->per_dir_config, so we
+ * accumulate opts and override as we merge, from the globals.
+ */
+ this_dir = ap_get_core_module_config(r->per_dir_config);
+ opts.opts = this_dir->opts;
+ opts.add = this_dir->opts_add;
+ opts.remove = this_dir->opts_remove;
+ opts.override = this_dir->override;
+ opts.override_opts = this_dir->override_opts;
+ opts.override_list = this_dir->override_list;
+
+ /* Set aside path_info to merge back onto path_info later.
+ * If r->filename is a directory, we must remerge the path_info,
+ * before we continue! [Directories cannot, by definition, have
+ * path info. Either the next segment is not-found, or a file.]
+ *
+ * r->path_info tracks the unconsumed source path.
+ * r->filename tracks the path as we process it
+ */
+ if ((r->finfo.filetype == APR_DIR) && r->path_info && *r->path_info)
+ {
+ if ((rv = apr_filepath_merge(&r->path_info, r->filename,
+ r->path_info,
+ APR_FILEPATH_NOTABOVEROOT, r->pool))
+ != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(00033)
+ "dir_walk error, path_info %s is not relative "
+ "to the filename path %s for uri %s",
+ r->path_info, r->filename, r->uri);
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+
+ save_path_info = NULL;
+ }
+ else {
+ save_path_info = r->path_info;
+ r->path_info = r->filename;
+ }
+
+#ifdef CASE_BLIND_FILESYSTEM
+
+ canonical_len = 0;
+ while (r->canonical_filename && r->canonical_filename[canonical_len]
+ && (r->canonical_filename[canonical_len]
+ == r->path_info[canonical_len])) {
+ ++canonical_len;
+ }
+
+ while (canonical_len
+ && ((r->canonical_filename[canonical_len - 1] != '/'
+ && r->canonical_filename[canonical_len - 1])
+ || (r->path_info[canonical_len - 1] != '/'
+ && r->path_info[canonical_len - 1]))) {
+ --canonical_len;
+ }
+
+ /*
+ * Now build r->filename component by component, starting
+ * with the root (on Unix, simply "/"). We will make a huge
+ * assumption here for efficiency, that any canonical path
+ * already given included a canonical root.
+ */
+ rv = apr_filepath_root((const char **)&r->filename,
+ (const char **)&r->path_info,
+ canonical_len ? 0 : APR_FILEPATH_TRUENAME,
+ r->pool);
+ filename_len = strlen(r->filename);
+
+ /*
+ * Bad assumption above? If the root's length is longer
+ * than the canonical length, then it cannot be trusted as
+ * a truename. So try again, this time more seriously.
+ */
+ if ((rv == APR_SUCCESS) && canonical_len
+ && (filename_len > canonical_len)) {
+ rv = apr_filepath_root((const char **)&r->filename,
+ (const char **)&r->path_info,
+ APR_FILEPATH_TRUENAME, r->pool);
+ filename_len = strlen(r->filename);
+ canonical_len = 0;
+ }
+
+#else /* ndef CASE_BLIND_FILESYSTEM, really this simple for Unix today; */
+
+ rv = apr_filepath_root((const char **)&r->filename,
+ (const char **)&r->path_info,
+ 0, r->pool);
+ filename_len = strlen(r->filename);
+
+#endif
+
+ if (rv != APR_SUCCESS) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(00034)
+ "dir_walk error, could not determine the root "
+ "path of filename %s%s for uri %s",
+ r->filename, r->path_info, r->uri);
+ return HTTP_INTERNAL_SERVER_ERROR;
+ }
+
+ /* Working space for terminating null and an extra / is required.
+ */
+ buflen = filename_len + strlen(r->path_info) + 2;
+ buf = apr_palloc(r->pool, buflen);
+ memcpy(buf, r->filename, filename_len + 1);
+ r->filename = buf;
+ thisinfo.valid = APR_FINFO_TYPE;
+ thisinfo.filetype = APR_DIR; /* It's the root, of course it's a dir */
+
+ /*
+ * seg keeps track of which segment we've copied.
+ * sec_idx keeps track of which section we're on, since sections are
+ * ordered by number of segments. See core_reorder_directories
+ * startseg tells us how many segments describe the root path
+ * e.g. the complete path "//host/foo/" to a UNC share (4)
+ */
+ startseg = seg = ap_count_dirs(r->filename);
+ sec_idx = 0;
+
+ /*
+ * Go down the directory hierarchy. Where we have to check for
+ * symlinks, do so. Where a .htaccess file has permission to
+ * override anything, try to find one.
+ */
+ do {
+ int res;
+ char *seg_name;
+ char *delim;
+ int temp_slash=0;
+
+ /* We have no trailing slash, but we sure would appreciate one.
+ * However, we don't want to append a / our first time through.
+ */
+ if ((seg > startseg) && r->filename[filename_len-1] != '/') {
+ r->filename[filename_len++] = '/';
+ r->filename[filename_len] = 0;
+ temp_slash=1;
+ }
+
+ /* Begin *this* level by looking for matching <Directory> sections
+ * from the server config.
+ */
+ for (; sec_idx < num_sec; ++sec_idx) {
+
+ ap_conf_vector_t *entry_config = sec_ent[sec_idx];
+ core_dir_config *entry_core;
+ entry_core = ap_get_core_module_config(entry_config);
+
+ /* No more possible matches for this many segments?
+ * We are done when we find relative/regex/longer components.
+ */
+ if (entry_core->r || entry_core->d_components > seg) {
+ break;
+ }
+
+ /* We will never skip '0' element components, e.g. plain old
+ * <Directory >, and <Directory "/"> are classified as zero
+ * so that Win32/Netware/OS2 etc all pick them up.
+ * Otherwise, skip over the mismatches.
+ */
+ if (entry_core->d_components
+ && ((entry_core->d_components < seg)
+ || (entry_core->d_is_fnmatch
+ ? (apr_fnmatch(entry_core->d, r->filename,
+ APR_FNM_PATHNAME) != APR_SUCCESS)
+ : (strcmp(r->filename, entry_core->d) != 0)))) {
+ continue;
+ }
+
+ /* If we haven't continue'd above, we have a match.
+ *
+ * Calculate our full-context core opts & override.
+ */
+ core_opts_merge(sec_ent[sec_idx], &opts);
+
+ /* If we merged this same section last time, reuse it
+ */
+ if (matches) {
+ if (last_walk->matched == sec_ent[sec_idx]) {
+ now_merged = last_walk->merged;
+ ++last_walk;
+ --matches;
+ continue;
+ }
+
+ /* We fell out of sync. This is our own copy of walked,
+ * so truncate the remaining matches and reset remaining.
+ */
+ cache->walked->nelts -= matches;
+ matches = 0;
+ cached = 0;
+ }
+
+ if (now_merged) {
+ now_merged = ap_merge_per_dir_configs(r->pool,
+ now_merged,
+ sec_ent[sec_idx]);
+ }
+ else {
+ now_merged = sec_ent[sec_idx];
+ }
+
+ last_walk = (walk_walked_t*)apr_array_push(cache->walked);
+ last_walk->matched = sec_ent[sec_idx];
+ last_walk->merged = now_merged;
+ }
+
+ /* If .htaccess files are enabled, check for one, provided we
+ * have reached a real path.
+ */
+ do { /* Not really a loop, just a break'able code block */
+
+ ap_conf_vector_t *htaccess_conf = NULL;
+
+ /* No htaccess in an incomplete root path,
+ * nor if it's disabled
+ */
+ if (seg < startseg || (!opts.override
+ && apr_is_empty_table(opts.override_list)
+ )) {
+ break;
+ }
+
+
+ res = ap_parse_htaccess(&htaccess_conf, r, opts.override,
+ opts.override_opts, opts.override_list,
+ r->filename, sconf->access_name);
+ if (res) {
+ return res;
+ }
+
+ if (!htaccess_conf) {
+ break;
+ }
+
+ /* If we are still here, we found our htaccess.
+ *
+ * Calculate our full-context core opts & override.
+ */
+ core_opts_merge(htaccess_conf, &opts);
+
+ /* If we merged this same htaccess last time, reuse it...
+ * this wouldn't work except that we cache the htaccess
+ * sections for the lifetime of the request, so we match
+ * the same conf. Good planning (no, pure luck ;)
+ */
+ if (matches) {
+ if (last_walk->matched == htaccess_conf) {
+ now_merged = last_walk->merged;
+ ++last_walk;
+ --matches;
+ break;
+ }
+
+ /* We fell out of sync. This is our own copy of walked,
+ * so truncate the remaining matches and reset
+ * remaining.
+ */
+ cache->walked->nelts -= matches;
+ matches = 0;
+ cached = 0;
+ }
+
+ if (now_merged) {
+ now_merged = ap_merge_per_dir_configs(r->pool,
+ now_merged,
+ htaccess_conf);
+ }
+ else {
+ now_merged = htaccess_conf;
+ }
+
+ last_walk = (walk_walked_t*)apr_array_push(cache->walked);
+ last_walk->matched = htaccess_conf;
+ last_walk->merged = now_merged;
+
+ } while (0); /* Only one htaccess, not a real loop */
+
+ /* That temporary trailing slash was useful, now drop it.
+ */
+ if (temp_slash) {
+ r->filename[--filename_len] = '\0';
+ }
+
+ /* Time for all good things to come to an end?
+ */
+ if (!r->path_info || !*r->path_info) {
+ break;
+ }
+
+ /* Now it's time for the next segment...
+ * We will assume the next element is an end node, and fix it up
+ * below as necessary...
+ */
+
+ seg_name = r->filename + filename_len;
+ delim = strchr(r->path_info + (*r->path_info == '/' ? 1 : 0), '/');
+ if (delim) {
+ apr_size_t path_info_len = delim - r->path_info;
+ *delim = '\0';
+ memcpy(seg_name, r->path_info, path_info_len + 1);
+ filename_len += path_info_len;
+ r->path_info = delim;
+ *delim = '/';
+ }
+ else {
+ apr_size_t path_info_len = strlen(r->path_info);
+ memcpy(seg_name, r->path_info, path_info_len + 1);
+ filename_len += path_info_len;
+ r->path_info += path_info_len;
+ }
+ if (*seg_name == '/')
+ ++seg_name;
+
+ /* If nothing remained but a '/' string, we are finished
+ * XXX: NO WE ARE NOT!!! Now process this puppy!!! */
+ if (!*seg_name) {
+ break;
+ }
+
+ /* First optimization;
+ * If...we knew r->filename was a file, and
+ * if...we have strict (case-sensitive) filenames, or
+ * we know the canonical_filename matches to _this_ name, and
+ * if...we have allowed symlinks
+ * skip the lstat and dummy up an APR_DIR value for thisinfo.
+ */
+ if (r->finfo.filetype != APR_NOFILE
+#ifdef CASE_BLIND_FILESYSTEM
+ && (filename_len <= canonical_len)
+#endif
+ && ((opts.opts & (OPT_SYM_OWNER | OPT_SYM_LINKS)) == OPT_SYM_LINKS))
+ {
+
+ thisinfo.filetype = APR_DIR;
+ ++seg;
+ continue;
+ }
+
+ /* We choose apr_stat with flag APR_FINFO_LINK here, rather that
+ * plain apr_stat, so that we capture this path object rather than
+ * its target. We will replace the info with our target's info
+ * below. We especially want the name of this 'link' object, not
+ * the name of its target, if we are fixing the filename
+ * case/resolving aliases.
+ */
+ rv = ap_run_dirwalk_stat(&thisinfo, r,
+ APR_FINFO_MIN | APR_FINFO_NAME | APR_FINFO_LINK);
+
+ if (APR_STATUS_IS_ENOENT(rv)) {
+ /* Nothing? That could be nice. But our directory
+ * walk is done.
+ */
+ thisinfo.filetype = APR_NOFILE;
+ break;
+ }
+ else if (APR_STATUS_IS_EACCES(rv)) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(00035)
+ "access to %s denied (filesystem path '%s') "
+ "because search permissions are missing on a "
+ "component of the path", r->uri, r->filename);
+ return r->status = HTTP_FORBIDDEN;
+ }
+ else if ((rv != APR_SUCCESS && rv != APR_INCOMPLETE)
+ || !(thisinfo.valid & APR_FINFO_TYPE)) {
+ /* If we hit ENOTDIR, we must have over-optimized, deny
+ * rather than assume not found.
+ */
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(00036)
+ "access to %s failed (filesystem path '%s')",
+ r->uri, r->filename);
+ return r->status = HTTP_FORBIDDEN;
+ }
+
+ /* Fix up the path now if we have a name, and they don't agree
+ */
+ if ((thisinfo.valid & APR_FINFO_NAME)
+ && strcmp(seg_name, thisinfo.name)) {
+ /* TODO: provide users an option that an internal/external
+ * redirect is required here? We need to walk the URI and
+ * filename in tandem to properly correlate these.
+ */
+ strcpy(seg_name, thisinfo.name);
+ filename_len = strlen(r->filename);
+ }
+
+ if (thisinfo.filetype == APR_LNK) {
+ /* Is this a possibly acceptable symlink?
+ */
+ if ((res = resolve_symlink(r->filename, &thisinfo,
+ opts.opts, r->pool)) != OK) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00037)
+ "Symbolic link not allowed "
+ "or link target not accessible: %s",
+ r->filename);
+ return r->status = res;
+ }
+ }
+
+ /* Ok, we are done with the link's info, test the real target
+ */
+ if (thisinfo.filetype == APR_REG ||
+ thisinfo.filetype == APR_NOFILE) {
+ /* That was fun, nothing left for us here
+ */
+ break;
+ }
+ else if (thisinfo.filetype != APR_DIR) {
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00038)
+ "Forbidden: %s doesn't point to "
+ "a file or directory",
+ r->filename);
+ return r->status = HTTP_FORBIDDEN;
+ }
+
+ ++seg;
+ } while (thisinfo.filetype == APR_DIR);
+
+ /* If we have _not_ optimized, this is the time to recover
+ * the final stat result.
+ */
+ if (r->finfo.filetype == APR_NOFILE || r->finfo.filetype == APR_LNK) {
+ r->finfo = thisinfo;
+ }
+
+ /* Now splice the saved path_info back onto any new path_info
+ */
+ if (save_path_info) {
+ if (r->path_info && *r->path_info) {
+ r->path_info = ap_make_full_path(r->pool, r->path_info,
+ save_path_info);
+ }
+ else {
+ r->path_info = save_path_info;
+ }
+ }
+
+ /*
+ * Now we'll deal with the regexes, note we pick up sec_idx
+ * where we left off (we gave up after we hit entry_core->r)
+ */
+ for (; sec_idx < num_sec; ++sec_idx) {
+
+ int nmatch = 0;
+ int i;
+ ap_regmatch_t *pmatch = NULL;
+
+ core_dir_config *entry_core;
+ entry_core = ap_get_core_module_config(sec_ent[sec_idx]);
+
+ if (!entry_core->r) {
+ continue;
+ }
+
+ if (entry_core->refs && entry_core->refs->nelts) {
+ if (!rxpool) {
+ apr_pool_create(&rxpool, r->pool);
+ apr_pool_tag(rxpool, "directory_walk_rxpool");
+ }
+ nmatch = entry_core->refs->nelts;
+ pmatch = apr_palloc(rxpool, nmatch*sizeof(ap_regmatch_t));
+ }
+
+ if (ap_regexec(entry_core->r, r->filename, nmatch, pmatch, 0)) {
+ continue;
+ }
+
+ for (i = 0; i < nmatch; i++) {
+ if (pmatch[i].rm_so >= 0 && pmatch[i].rm_eo >= 0 &&
+ ((const char **)entry_core->refs->elts)[i]) {
+ apr_table_setn(r->subprocess_env,
+ ((const char **)entry_core->refs->elts)[i],
+ apr_pstrndup(r->pool,
+ r->filename + pmatch[i].rm_so,
+ pmatch[i].rm_eo - pmatch[i].rm_so));
+ }
+ }
+
+ /* If we haven't already continue'd above, we have a match.
+ *
+ * Calculate our full-context core opts & override.
+ */
+ core_opts_merge(sec_ent[sec_idx], &opts);
+
+ /* If we merged this same section last time, reuse it
+ */
+ if (matches) {
+ if (last_walk->matched == sec_ent[sec_idx]) {
+ now_merged = last_walk->merged;
+ ++last_walk;
+ --matches;
+ continue;
+ }
+
+ /* We fell out of sync. This is our own copy of walked,
+ * so truncate the remaining matches and reset remaining.
+ */
+ cache->walked->nelts -= matches;
+ matches = 0;
+ cached = 0;
+ }
+
+ if (now_merged) {
+ now_merged = ap_merge_per_dir_configs(r->pool,
+ now_merged,
+ sec_ent[sec_idx]);
+ }
+ else {
+ now_merged = sec_ent[sec_idx];
+ }
+
+ last_walk = (walk_walked_t*)apr_array_push(cache->walked);
+ last_walk->matched = sec_ent[sec_idx];
+ last_walk->merged = now_merged;
+ }
+
+ if (rxpool) {
+ apr_pool_destroy(rxpool);
+ }
+
+ /* Whoops - everything matched in sequence, but either the original
+ * walk found some additional matches (which we need to truncate), or
+ * this walk found some additional matches.
+ */
+ if (matches) {
+ cache->walked->nelts -= matches;
+ cached = 0;
+ }
+ else if (cache->walked->nelts > cached_matches) {
+ cached = 0;
+ }
+ }
+
+/* It seems this shouldn't be needed anymore. We translated the
+ x symlink above into a real resource, and should have died up there.
+ x Even if we keep this, it needs more thought (maybe an r->file_is_symlink)
+ x perhaps it should actually happen in file_walk, so we catch more
+ x obscure cases in autoindex subrequests, etc.
+ x
+ x * Symlink permissions are determined by the parent. If the request is
+ x * for a directory then applying the symlink test here would use the
+ x * permissions of the directory as opposed to its parent. Consider a
+ x * symlink pointing to a dir with a .htaccess disallowing symlinks. If
+ x * you access /symlink (or /symlink/) you would get a 403 without this
+ x * APR_DIR test. But if you accessed /symlink/index.html, for example,
+ x * you would *not* get the 403.
+ x
+ x if (r->finfo.filetype != APR_DIR
+ x && (res = resolve_symlink(r->filename, r->info, ap_allow_options(r),
+ x r->pool))) {
+ x ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,
+ x "Symbolic link not allowed: %s", r->filename);
+ x return res;
+ x }
+ */
+
+ /* Save future sub-requestors much angst in processing
+ * this subrequest. If dir_walk couldn't canonicalize
+ * the file path, nothing can.
+ */
+ r->canonical_filename = r->filename;
+
+ if (r->finfo.filetype == APR_DIR) {
+ cache->cached = apr_pstrdup(r->pool, r->filename);
+ }
+ else {
+ cache->cached = ap_make_dirstr_parent(r->pool, r->filename);
+ }
+
+ if (cached
+ && r->per_dir_config == cache->dir_conf_merged) {
+ r->per_dir_config = cache->per_dir_result;
+ return OK;
+ }
+
+ cache->dir_conf_tested = sec_ent;
+ cache->dir_conf_merged = r->per_dir_config;
+
+ /* Merge our cache->dir_conf_merged construct with the r->per_dir_configs,
+ * and note the end result to (potentially) skip this step next time.
+ */
+ if (now_merged) {
+ r->per_dir_config = ap_merge_per_dir_configs(r->pool,
+ r->per_dir_config,
+ now_merged);
+ }
+ cache->per_dir_result = r->per_dir_config;
+
+ return OK;
+}
+
+
+AP_DECLARE(int) ap_location_walk(request_rec *r)
+{
+ ap_conf_vector_t *now_merged = NULL;
+ core_server_config *sconf =
+ ap_get_core_module_config(r->server->module_config);
+ ap_conf_vector_t **sec_ent = (ap_conf_vector_t **)sconf->sec_url->elts;
+ int num_sec = sconf->sec_url->nelts;
+ walk_cache_t *cache;
+ const char *entry_uri;
+ int cached;
+
+ /* No tricks here, there are no <Locations > to parse in this vhost.
+ * We won't destroy the cache, just in case _this_ redirect is later
+ * redirected again to a vhost with <Location > blocks to optimize.
+ */
+ if (!num_sec) {
+ return OK;
+ }
+
+ cache = prep_walk_cache(AP_NOTE_LOCATION_WALK, r);
+ cached = (cache->cached != NULL);
+
+ /*
+ * When merge_slashes is set to AP_CORE_CONFIG_OFF the slashes in r->uri
+ * have not been merged. But for Location walks we always go with merged
+ * slashes no matter what merge_slashes is set to.
+ */
+ if (sconf->merge_slashes != AP_CORE_CONFIG_OFF) {
+ entry_uri = r->uri;
+ }
+ else {
+ char *uri = apr_pstrdup(r->pool, r->uri);
+ ap_no2slash(uri);
+ entry_uri = uri;
+ }
+
+ /* If we have an cache->cached location that matches r->uri,
+ * and the vhost's list of locations hasn't changed, we can skip
+ * rewalking the location_walk entries.
+ */
+ if (cached
+ && (cache->dir_conf_tested == sec_ent)
+ && (strcmp(entry_uri, cache->cached) == 0)) {
+ /* Well this looks really familiar! If our end-result (per_dir_result)
+ * didn't change, we have absolutely nothing to do :)
+ * Otherwise (as is the case with most dir_merged/file_merged requests)
+ * we must merge our dir_conf_merged onto this new r->per_dir_config.
+ */
+ if (r->per_dir_config == cache->per_dir_result) {
+ return OK;
+ }
+
+ if (cache->walked->nelts) {
+ now_merged = ((walk_walked_t*)cache->walked->elts)
+ [cache->walked->nelts - 1].merged;
+ }
+ }
+ else {
+ /* We start now_merged from NULL since we want to build
+ * a locations list that can be merged to any vhost.
+ */
+ int len, sec_idx;
+ int matches = cache->walked->nelts;
+ int cached_matches = matches;
+ walk_walked_t *last_walk = (walk_walked_t*)cache->walked->elts;
+ apr_pool_t *rxpool = NULL;
+
+ cached &= auth_internal_per_conf;
+ cache->cached = apr_pstrdup(r->pool, entry_uri);
+
+ /* Go through the location entries, and check for matches.
+ * We apply the directive sections in given order, we should
+ * really try them with the most general first.
+ */
+ for (sec_idx = 0; sec_idx < num_sec; ++sec_idx) {
+
+ core_dir_config *entry_core;
+ entry_core = ap_get_core_module_config(sec_ent[sec_idx]);
+
+ /* ### const strlen can be optimized in location config parsing */
+ len = strlen(entry_core->d);
+
+ /* Test the regex, fnmatch or string as appropriate.
+ * If it's a strcmp, and the <Location > pattern was
+ * not slash terminated, then this uri must be slash
+ * terminated (or at the end of the string) to match.
+ */
+ if (entry_core->r) {
+
+ int nmatch = 0;
+ int i;
+ ap_regmatch_t *pmatch = NULL;
+
+ if (entry_core->refs && entry_core->refs->nelts) {
+ if (!rxpool) {
+ apr_pool_create(&rxpool, r->pool);
+ apr_pool_tag(rxpool, "location_walk_rxpool");
+ }
+ nmatch = entry_core->refs->nelts;
+ pmatch = apr_palloc(rxpool, nmatch*sizeof(ap_regmatch_t));
+ }
+
+ if (ap_regexec(entry_core->r, r->uri, nmatch, pmatch, 0)) {
+ continue;
+ }
+
+ for (i = 0; i < nmatch; i++) {
+ if (pmatch[i].rm_so >= 0 && pmatch[i].rm_eo >= 0 &&
+ ((const char **)entry_core->refs->elts)[i]) {
+ apr_table_setn(r->subprocess_env,
+ ((const char **)entry_core->refs->elts)[i],
+ apr_pstrndup(r->pool,
+ r->uri + pmatch[i].rm_so,
+ pmatch[i].rm_eo - pmatch[i].rm_so));
+ }
+ }
+
+ }
+ else {
+
+ if ((entry_core->d_is_fnmatch
+ ? apr_fnmatch(entry_core->d, cache->cached, APR_FNM_PATHNAME)
+ : (strncmp(entry_core->d, cache->cached, len)
+ || (len > 0
+ && entry_core->d[len - 1] != '/'
+ && cache->cached[len] != '/'
+ && cache->cached[len] != '\0')))) {
+ continue;
+ }
+
+ }
+
+ /* If we merged this same section last time, reuse it
+ */
+ if (matches) {
+ if (last_walk->matched == sec_ent[sec_idx]) {
+ now_merged = last_walk->merged;
+ ++last_walk;
+ --matches;
+ continue;
+ }
+
+ /* We fell out of sync. This is our own copy of walked,
+ * so truncate the remaining matches and reset remaining.
+ */
+ cache->walked->nelts -= matches;
+ matches = 0;
+ cached = 0;
+ }
+
+ if (now_merged) {
+ now_merged = ap_merge_per_dir_configs(r->pool,
+ now_merged,
+ sec_ent[sec_idx]);
+ }
+ else {
+ now_merged = sec_ent[sec_idx];
+ }
+
+ last_walk = (walk_walked_t*)apr_array_push(cache->walked);
+ last_walk->matched = sec_ent[sec_idx];
+ last_walk->merged = now_merged;
+ }
+
+ if (rxpool) {
+ apr_pool_destroy(rxpool);
+ }
+
+ /* Whoops - everything matched in sequence, but either the original
+ * walk found some additional matches (which we need to truncate), or
+ * this walk found some additional matches.
+ */
+ if (matches) {
+ cache->walked->nelts -= matches;
+ cached = 0;
+ }
+ else if (cache->walked->nelts > cached_matches) {
+ cached = 0;
+ }
+ }
+
+ if (cached
+ && r->per_dir_config == cache->dir_conf_merged) {
+ r->per_dir_config = cache->per_dir_result;
+ return OK;
+ }
+
+ cache->dir_conf_tested = sec_ent;
+ cache->dir_conf_merged = r->per_dir_config;
+
+ /* Merge our cache->dir_conf_merged construct with the r->per_dir_configs,
+ * and note the end result to (potentially) skip this step next time.
+ */
+ if (now_merged) {
+ r->per_dir_config = ap_merge_per_dir_configs(r->pool,
+ r->per_dir_config,
+ now_merged);
+ }
+ cache->per_dir_result = r->per_dir_config;
+
+ return OK;
+}
+
+AP_DECLARE(int) ap_file_walk(request_rec *r)
+{
+ ap_conf_vector_t *now_merged = NULL;
+ core_dir_config *dconf = ap_get_core_module_config(r->per_dir_config);
+ ap_conf_vector_t **sec_ent = NULL;
+ int num_sec = 0;
+ walk_cache_t *cache;
+ const char *test_file;
+ int cached;
+
+ if (dconf->sec_file) {
+ sec_ent = (ap_conf_vector_t **)dconf->sec_file->elts;
+ num_sec = dconf->sec_file->nelts;
+ }
+
+ /* To allow broken modules to proceed, we allow missing filenames to pass.
+ * We will catch it later if it's heading for the core handler.
+ * directory_walk already posted an INFO note for module debugging.
+ */
+ if (r->filename == NULL) {
+ return OK;
+ }
+
+ /* No tricks here, there are just no <Files > to parse in this context.
+ * We won't destroy the cache, just in case _this_ redirect is later
+ * redirected again to a context containing the same or similar <Files >.
+ */
+ if (!num_sec) {
+ return OK;
+ }
+
+ cache = prep_walk_cache(AP_NOTE_FILE_WALK, r);
+ cached = (cache->cached != NULL);
+
+ /* Get the basename .. and copy for the cache just
+ * in case r->filename is munged by another module
+ */
+ test_file = strrchr(r->filename, '/');
+ if (test_file == NULL) {
+ test_file = apr_pstrdup(r->pool, r->filename);
+ }
+ else {
+ test_file = apr_pstrdup(r->pool, ++test_file);
+ }
+
+ /* If we have an cache->cached file name that matches test_file,
+ * and the directory's list of file sections hasn't changed, we
+ * can skip rewalking the file_walk entries.
+ */
+ if (cached
+ && (cache->dir_conf_tested == sec_ent)
+ && (strcmp(test_file, cache->cached) == 0)) {
+ /* Well this looks really familiar! If our end-result (per_dir_result)
+ * didn't change, we have absolutely nothing to do :)
+ * Otherwise (as is the case with most dir_merged requests)
+ * we must merge our dir_conf_merged onto this new r->per_dir_config.
+ */
+ if (r->per_dir_config == cache->per_dir_result) {
+ return OK;
+ }
+
+ if (cache->walked->nelts) {
+ now_merged = ((walk_walked_t*)cache->walked->elts)
+ [cache->walked->nelts - 1].merged;
+ }
+ }
+ else {
+ /* We start now_merged from NULL since we want to build
+ * a file section list that can be merged to any dir_walk.
+ */
+ int sec_idx;
+ int matches = cache->walked->nelts;
+ int cached_matches = matches;
+ walk_walked_t *last_walk = (walk_walked_t*)cache->walked->elts;
+ apr_pool_t *rxpool = NULL;
+
+ cached &= auth_internal_per_conf;
+ cache->cached = test_file;
+
+ /* Go through the location entries, and check for matches.
+ * We apply the directive sections in given order, we should
+ * really try them with the most general first.
+ */
+ for (sec_idx = 0; sec_idx < num_sec; ++sec_idx) {
+ core_dir_config *entry_core;
+ entry_core = ap_get_core_module_config(sec_ent[sec_idx]);
+
+ if (entry_core->r) {
+
+ int nmatch = 0;
+ int i;
+ ap_regmatch_t *pmatch = NULL;
+
+ if (entry_core->refs && entry_core->refs->nelts) {
+ if (!rxpool) {
+ apr_pool_create(&rxpool, r->pool);
+ apr_pool_tag(rxpool, "file_walk_rxpool");
+ }
+ nmatch = entry_core->refs->nelts;
+ pmatch = apr_palloc(rxpool, nmatch*sizeof(ap_regmatch_t));
+ }
+
+ if (ap_regexec(entry_core->r, cache->cached, nmatch, pmatch, 0)) {
+ continue;
+ }
+
+ for (i = 0; i < nmatch; i++) {
+ if (pmatch[i].rm_so >= 0 && pmatch[i].rm_eo >= 0 &&
+ ((const char **)entry_core->refs->elts)[i]) {
+ apr_table_setn(r->subprocess_env,
+ ((const char **)entry_core->refs->elts)[i],
+ apr_pstrndup(r->pool,
+ cache->cached + pmatch[i].rm_so,
+ pmatch[i].rm_eo - pmatch[i].rm_so));
+ }
+ }
+
+ }
+ else {
+ if ((entry_core->d_is_fnmatch
+ ? apr_fnmatch(entry_core->d, cache->cached, APR_FNM_PATHNAME)
+ : strcmp(entry_core->d, cache->cached))) {
+ continue;
+ }
+ }
+
+ /* If we merged this same section last time, reuse it
+ */
+ if (matches) {
+ if (last_walk->matched == sec_ent[sec_idx]) {
+ now_merged = last_walk->merged;
+ ++last_walk;
+ --matches;
+ continue;
+ }
+
+ /* We fell out of sync. This is our own copy of walked,
+ * so truncate the remaining matches and reset remaining.
+ */
+ cache->walked->nelts -= matches;
+ matches = 0;
+ cached = 0;
+ }
+
+ if (now_merged) {
+ now_merged = ap_merge_per_dir_configs(r->pool,
+ now_merged,
+ sec_ent[sec_idx]);
+ }
+ else {
+ now_merged = sec_ent[sec_idx];
+ }
+
+ last_walk = (walk_walked_t*)apr_array_push(cache->walked);
+ last_walk->matched = sec_ent[sec_idx];
+ last_walk->merged = now_merged;
+ }
+
+ if (rxpool) {
+ apr_pool_destroy(rxpool);
+ }
+
+ /* Whoops - everything matched in sequence, but either the original
+ * walk found some additional matches (which we need to truncate), or
+ * this walk found some additional matches.
+ */
+ if (matches) {
+ cache->walked->nelts -= matches;
+ cached = 0;
+ }
+ else if (cache->walked->nelts > cached_matches) {
+ cached = 0;
+ }
+ }
+
+ if (cached
+ && r->per_dir_config == cache->dir_conf_merged) {
+ r->per_dir_config = cache->per_dir_result;
+ return OK;
+ }
+
+ cache->dir_conf_tested = sec_ent;
+ cache->dir_conf_merged = r->per_dir_config;
+
+ /* Merge our cache->dir_conf_merged construct with the r->per_dir_configs,
+ * and note the end result to (potentially) skip this step next time.
+ */
+ if (now_merged) {
+ r->per_dir_config = ap_merge_per_dir_configs(r->pool,
+ r->per_dir_config,
+ now_merged);
+ }
+ cache->per_dir_result = r->per_dir_config;
+
+ return OK;
+}
+
+static int ap_if_walk_sub(request_rec *r, core_dir_config* dconf)
+{
+ ap_conf_vector_t *now_merged = NULL;
+ ap_conf_vector_t **sec_ent = NULL;
+ int num_sec = 0;
+ walk_cache_t *cache;
+ int cached;
+ int sec_idx;
+ int matches;
+ int cached_matches;
+ int prev_result = -1;
+ walk_walked_t *last_walk;
+
+ if (dconf && dconf->sec_if) {
+ sec_ent = (ap_conf_vector_t **)dconf->sec_if->elts;
+ num_sec = dconf->sec_if->nelts;
+ }
+
+ /* No tricks here, there are just no <If > to parse in this context.
+ * We won't destroy the cache, just in case _this_ redirect is later
+ * redirected again to a context containing the same or similar <If >.
+ */
+ if (!num_sec) {
+ return OK;
+ }
+
+ cache = prep_walk_cache(AP_NOTE_IF_WALK, r);
+ cached = (cache->cached != NULL);
+ cache->cached = (void *)1;
+ matches = cache->walked->nelts;
+ cached_matches = matches;
+ last_walk = (walk_walked_t*)cache->walked->elts;
+
+ cached &= auth_internal_per_conf;
+
+ /* Go through the if entries, and check for matches */
+ for (sec_idx = 0; sec_idx < num_sec; ++sec_idx) {
+ const char *err = NULL;
+ core_dir_config *entry_core;
+ int rc;
+ entry_core = ap_get_core_module_config(sec_ent[sec_idx]);
+
+ AP_DEBUG_ASSERT(entry_core->condition_ifelse != 0);
+ if (entry_core->condition_ifelse & AP_CONDITION_ELSE) {
+ AP_DEBUG_ASSERT(prev_result != -1);
+ if (prev_result == 1)
+ continue;
+ }
+
+ if (entry_core->condition_ifelse & AP_CONDITION_IF) {
+ rc = ap_expr_exec(r, entry_core->condition, &err);
+ if (rc <= 0) {
+ if (rc < 0)
+ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00039)
+ "Failed to evaluate <If > condition: %s",
+ err);
+ prev_result = 0;
+ continue;
+ }
+ prev_result = 1;
+ }
+ else {
+ prev_result = -1;
+ }
+
+ /* If we merged this same section last time, reuse it
+ */
+ if (matches) {
+ if (last_walk->matched == sec_ent[sec_idx]) {
+ now_merged = last_walk->merged;
+ ++last_walk;
+ --matches;
+ continue;
+ }
+
+ /* We fell out of sync. This is our own copy of walked,
+ * so truncate the remaining matches and reset remaining.
+ */
+ cache->walked->nelts -= matches;
+ matches = 0;
+ cached = 0;
+ }
+
+ if (now_merged) {
+ now_merged = ap_merge_per_dir_configs(r->pool,
+ now_merged,
+ sec_ent[sec_idx]);
+ }
+ else {
+ now_merged = sec_ent[sec_idx];
+ }
+
+ last_walk = (walk_walked_t*)apr_array_push(cache->walked);
+ last_walk->matched = sec_ent[sec_idx];
+ last_walk->merged = now_merged;
+ }
+
+ /* Everything matched in sequence, but it may be that the original
+ * walk found some additional matches (which we need to truncate), or
+ * this walk found some additional matches.
+ */
+ if (matches) {
+ cache->walked->nelts -= matches;
+ cached = 0;
+ }
+ else if (cache->walked->nelts > cached_matches) {
+ cached = 0;
+ }
+
+ if (cached
+ && r->per_dir_config == cache->dir_conf_merged) {
+ r->per_dir_config = cache->per_dir_result;
+ return OK;
+ }
+
+ cache->dir_conf_tested = sec_ent;
+ cache->dir_conf_merged = r->per_dir_config;
+
+ /* Merge our cache->dir_conf_merged construct with the r->per_dir_configs,
+ * and note the end result to (potentially) skip this step next time.
+ */
+ if (now_merged) {
+ r->per_dir_config = ap_merge_per_dir_configs(r->pool,
+ r->per_dir_config,
+ now_merged);
+ }
+ cache->per_dir_result = r->per_dir_config;
+
+ if (now_merged) {
+ core_dir_config *dconf_merged = ap_get_core_module_config(now_merged);
+
+ /* Allow nested <If>s and their configs to get merged
+ * with the current one.
+ */
+ return ap_if_walk_sub(r, dconf_merged);
+ }
+
+ return OK;
+}
+
+AP_DECLARE(int) ap_if_walk(request_rec *r)
+{
+ core_dir_config *dconf = ap_get_core_module_config(r->per_dir_config);
+ int status = ap_if_walk_sub(r, dconf);
+ return status;
+}
+
+/*****************************************************************
+ *
+ * The sub_request mechanism.
+ *
+ * Fns to look up a relative URI from, e.g., a map file or SSI document.
+ * These do all access checks, etc., but don't actually run the transaction
+ * ... use run_sub_req below for that. Also, be sure to use destroy_sub_req
+ * as appropriate if you're likely to be creating more than a few of these.
+ * (An early Apache version didn't destroy the sub_reqs used in directory
+ * indexing. The result, when indexing a directory with 800-odd files in
+ * it, was massively excessive storage allocation).
+ *
+ * Note more manipulation of protocol-specific vars in the request
+ * structure...
+ */
+
+static request_rec *make_sub_request(const request_rec *r,
+ ap_filter_t *next_filter)
+{
+ apr_pool_t *rrp;
+ request_rec *rnew;
+
+ apr_pool_create(&rrp, r->pool);
+ apr_pool_tag(rrp, "subrequest");
+ rnew = apr_pcalloc(rrp, sizeof(request_rec));
+ rnew->pool = rrp;
+
+ rnew->hostname = r->hostname;
+ rnew->request_time = r->request_time;
+ rnew->connection = r->connection;
+ rnew->server = r->server;
+ rnew->log = r->log;
+
+ rnew->request_config = ap_create_request_config(rnew->pool);
+
+ /* Start a clean config from this subrequest's vhost. Optimization in
+ * Location/File/Dir walks from the parent request assure that if the
+ * config blocks of the subrequest match the parent request, no merges
+ * will actually occur (and generally a minimal number of merges are
+ * required, even if the parent and subrequest aren't quite identical.)
+ */
+ rnew->per_dir_config = r->server->lookup_defaults;
+
+ rnew->htaccess = r->htaccess;
+ rnew->allowed_methods = ap_make_method_list(rnew->pool, 2);
+
+ /* make a copy of the allowed-methods list */
+ ap_copy_method_list(rnew->allowed_methods, r->allowed_methods);
+
+ /* start with the same set of output filters */
+ if (next_filter) {
+ ap_filter_t *scan = next_filter;
+
+ /* while there are no input filters for a subrequest, we will
+ * try to insert some, so if we don't have valid data, the code
+ * will seg fault.
+ */
+ rnew->input_filters = r->input_filters;
+ rnew->proto_input_filters = r->proto_input_filters;
+ rnew->output_filters = next_filter;
+ rnew->proto_output_filters = r->proto_output_filters;
+ while (scan && (scan != r->proto_output_filters)) {
+ if (scan->frec == ap_subreq_core_filter_handle) {
+ break;
+ }
+ scan = scan->next;
+ }
+ if (!scan || scan == r->proto_output_filters) {
+ ap_add_output_filter_handle(ap_subreq_core_filter_handle,
+ NULL, rnew, rnew->connection);
+ }
+ }
+ else {
+ /* If NULL - we are expecting to be internal_fast_redirect'ed
+ * to this subrequest - or this request will never be invoked.
+ * Ignore the original request filter stack entirely, and
+ * drill the input and output stacks back to the connection.
+ */
+ rnew->proto_input_filters = r->proto_input_filters;
+ rnew->proto_output_filters = r->proto_output_filters;
+
+ rnew->input_filters = r->proto_input_filters;
+ rnew->output_filters = r->proto_output_filters;
+ }
+
+ rnew->useragent_addr = r->useragent_addr;
+ rnew->useragent_ip = r->useragent_ip;
+
+ /* no input filters for a subrequest */
+
+ ap_set_sub_req_protocol(rnew, r);
+
+ /* We have to run this after we fill in sub req vars,
+ * or the r->main pointer won't be setup
+ */
+ ap_run_create_request(rnew);
+
+ /* Begin by presuming any module can make its own path_info assumptions,
+ * until some module interjects and changes the value.
+ */
+ rnew->used_path_info = AP_REQ_DEFAULT_PATH_INFO;
+
+ /* Pass on the kept body (if any) into the new request. */
+ rnew->kept_body = r->kept_body;
+
+ return rnew;
+}
+
+AP_CORE_DECLARE_NONSTD(apr_status_t) ap_sub_req_output_filter(ap_filter_t *f,
+ apr_bucket_brigade *bb)
+{
+ apr_bucket *e = APR_BRIGADE_LAST(bb);
+
+ if (APR_BUCKET_IS_EOS(e)) {
+ apr_bucket_delete(e);
+ }
+
+ if (!APR_BRIGADE_EMPTY(bb)) {
+ return ap_pass_brigade(f->next, bb);
+ }
+
+ return APR_SUCCESS;
+}
+
+extern APR_OPTIONAL_FN_TYPE(authz_some_auth_required) *ap__authz_ap_some_auth_required;
+
+AP_DECLARE(int) ap_some_auth_required(request_rec *r)
+{
+ /* Is there a require line configured for the type of *this* req? */
+ if (ap__authz_ap_some_auth_required) {
+ return ap__authz_ap_some_auth_required(r);
+ }
+ else
+ return 0;
+}
+
+AP_DECLARE(void) ap_clear_auth_internal(void)
+{
+ auth_internal_per_conf_hooks = 0;
+ auth_internal_per_conf_providers = 0;
+}
+
+AP_DECLARE(void) ap_setup_auth_internal(apr_pool_t *ptemp)
+{
+ int total_auth_hooks = 0;
+ int total_auth_providers = 0;
+
+ auth_internal_per_conf = 0;
+
+ if (_hooks.link_access_checker) {
+ total_auth_hooks += _hooks.link_access_checker->nelts;
+ }
+ if (_hooks.link_access_checker_ex) {
+ total_auth_hooks += _hooks.link_access_checker_ex->nelts;
+ }
+ if (_hooks.link_check_user_id) {
+ total_auth_hooks += _hooks.link_check_user_id->nelts;
+ }
+ if (_hooks.link_auth_checker) {
+ total_auth_hooks += _hooks.link_auth_checker->nelts;
+ }
+
+ if (total_auth_hooks > auth_internal_per_conf_hooks) {
+ return;
+ }
+
+ total_auth_providers +=
+ ap_list_provider_names(ptemp, AUTHN_PROVIDER_GROUP,
+ AUTHN_PROVIDER_VERSION)->nelts;
+ total_auth_providers +=
+ ap_list_provider_names(ptemp, AUTHZ_PROVIDER_GROUP,
+ AUTHZ_PROVIDER_VERSION)->nelts;
+
+ if (total_auth_providers > auth_internal_per_conf_providers) {
+ return;
+ }
+
+ auth_internal_per_conf = 1;
+}
+
+AP_DECLARE(apr_status_t) ap_register_auth_provider(apr_pool_t *pool,
+ const char *provider_group,
+ const char *provider_name,
+ const char *provider_version,
+ const void *provider,
+ int type)
+{
+ if ((type & AP_AUTH_INTERNAL_MASK) == AP_AUTH_INTERNAL_PER_CONF) {
+ ++auth_internal_per_conf_providers;
+ }
+
+ return ap_register_provider(pool, provider_group, provider_name,
+ provider_version, provider);
+}
+
+AP_DECLARE(void) ap_hook_check_access(ap_HOOK_access_checker_t *pf,
+ const char * const *aszPre,
+ const char * const *aszSucc,
+ int nOrder, int type)
+{
+ if ((type & AP_AUTH_INTERNAL_MASK) == AP_AUTH_INTERNAL_PER_CONF) {
+ ++auth_internal_per_conf_hooks;
+ }
+
+ ap_hook_access_checker(pf, aszPre, aszSucc, nOrder);
+}
+
+AP_DECLARE(void) ap_hook_check_access_ex(ap_HOOK_access_checker_ex_t *pf,
+ const char * const *aszPre,
+ const char * const *aszSucc,
+ int nOrder, int type)
+{
+ if ((type & AP_AUTH_INTERNAL_MASK) == AP_AUTH_INTERNAL_PER_CONF) {
+ ++auth_internal_per_conf_hooks;
+ }
+
+ ap_hook_access_checker_ex(pf, aszPre, aszSucc, nOrder);
+}
+
+AP_DECLARE(void) ap_hook_check_authn(ap_HOOK_check_user_id_t *pf,
+ const char * const *aszPre,
+ const char * const *aszSucc,
+ int nOrder, int type)
+{
+ if ((type & AP_AUTH_INTERNAL_MASK) == AP_AUTH_INTERNAL_PER_CONF) {
+ ++auth_internal_per_conf_hooks;
+ }
+
+ ap_hook_check_user_id(pf, aszPre, aszSucc, nOrder);
+}
+
+AP_DECLARE(void) ap_hook_check_authz(ap_HOOK_auth_checker_t *pf,
+ const char * const *aszPre,
+ const char * const *aszSucc,
+ int nOrder, int type)
+{
+ if ((type & AP_AUTH_INTERNAL_MASK) == AP_AUTH_INTERNAL_PER_CONF) {
+ ++auth_internal_per_conf_hooks;
+ }
+
+ ap_hook_auth_checker(pf, aszPre, aszSucc, nOrder);
+}
+
+AP_DECLARE(request_rec *) ap_sub_req_method_uri(const char *method,
+ const char *new_uri,
+ const request_rec *r,
+ ap_filter_t *next_filter)
+{
+ request_rec *rnew;
+ /* Initialise res, to avoid a gcc warning */
+ int res = HTTP_INTERNAL_SERVER_ERROR;
+ char *udir;
+
+ rnew = make_sub_request(r, next_filter);
+
+ /* would be nicer to pass "method" to ap_set_sub_req_protocol */
+ rnew->method = method;
+ rnew->method_number = ap_method_number_of(method);
+
+ if (new_uri[0] == '/') {
+ ap_parse_uri(rnew, new_uri);
+ }
+ else {
+ udir = ap_make_dirstr_parent(rnew->pool, r->uri);
+ udir = ap_escape_uri(rnew->pool, udir); /* re-escape it */
+ ap_parse_uri(rnew, ap_make_full_path(rnew->pool, udir, new_uri));
+ }
+
+ /* We cannot return NULL without violating the API. So just turn this
+ * subrequest into a 500 to indicate the failure. */
+ if (ap_is_recursion_limit_exceeded(r)) {
+ rnew->status = HTTP_INTERNAL_SERVER_ERROR;
+ return rnew;
+ }
+
+ /* lookup_uri
+ * If the content can be served by the quick_handler, we can
+ * safely bypass request_internal processing.
+ *
+ * If next_filter is NULL we are expecting to be
+ * internal_fast_redirect'ed to the subrequest, or the subrequest will
+ * never be invoked. We need to make sure that the quickhandler is not
+ * invoked by any lookups. Since an internal_fast_redirect will always
+ * occur too late for the quickhandler to handle the request.
+ */
+ if (next_filter) {
+ res = ap_run_quick_handler(rnew, 1);
+ }
+
+ if (next_filter == NULL || res != OK) {
+ if ((res = ap_process_request_internal(rnew))) {
+ rnew->status = res;
+ }
+ }
+
+ return rnew;
+}
+
+AP_DECLARE(request_rec *) ap_sub_req_lookup_uri(const char *new_uri,
+ const request_rec *r,
+ ap_filter_t *next_filter)
+{
+ return ap_sub_req_method_uri("GET", new_uri, r, next_filter);
+}
+
+AP_DECLARE(request_rec *) ap_sub_req_lookup_dirent(const apr_finfo_t *dirent,
+ const request_rec *r,
+ int subtype,
+ ap_filter_t *next_filter)
+{
+ request_rec *rnew;
+ int res;
+ char *fdir;
+ char *udir;
+
+ rnew = make_sub_request(r, next_filter);
+
+ /* Special case: we are looking at a relative lookup in the same directory.
+ * This is 100% safe, since dirent->name just came from the filesystem.
+ */
+ if (r->path_info && *r->path_info) {
+ /* strip path_info off the end of the uri to keep it in sync
+ * with r->filename, which has already been stripped by directory_walk,
+ * merge the dirent->name, and then, if the caller wants us to remerge
+ * the original path info, do so. Note we never fix the path_info back
+ * to r->filename, since dir_walk would do so (but we don't expect it
+ * to happen in the usual cases)
+ */
+ udir = apr_pstrdup(rnew->pool, r->uri);
+ udir[ap_find_path_info(udir, r->path_info)] = '\0';
+ udir = ap_make_dirstr_parent(rnew->pool, udir);
+
+ rnew->uri = ap_make_full_path(rnew->pool, udir, dirent->name);
+ if (subtype == AP_SUBREQ_MERGE_ARGS) {
+ rnew->uri = ap_make_full_path(rnew->pool, rnew->uri, r->path_info + 1);
+ rnew->path_info = apr_pstrdup(rnew->pool, r->path_info);
+ }
+ rnew->uri = ap_escape_uri(rnew->pool, rnew->uri);
+ }
+ else {
+ udir = ap_make_dirstr_parent(rnew->pool, r->uri);
+ rnew->uri = ap_escape_uri(rnew->pool, ap_make_full_path(rnew->pool,
+ udir,
+ dirent->name));
+ }
+
+ fdir = ap_make_dirstr_parent(rnew->pool, r->filename);
+ rnew->filename = ap_make_full_path(rnew->pool, fdir, dirent->name);
+ if (r->canonical_filename == r->filename) {
+ rnew->canonical_filename = rnew->filename;
+ }
+
+ /* XXX This is now less relevant; we will do a full location walk
+ * these days for this case. Preserve the apr_stat results, and
+ * perhaps we also tag that symlinks were tested and/or found for
+ * r->filename.
+ */
+ rnew->per_dir_config = r->server->lookup_defaults;
+
+ if ((dirent->valid & APR_FINFO_MIN) != APR_FINFO_MIN) {
+ /*
+ * apr_dir_read isn't very complete on this platform, so
+ * we need another apr_stat (with or without APR_FINFO_LINK
+ * depending on whether we allow all symlinks here.) If this
+ * is an APR_LNK that resolves to an APR_DIR, then we will rerun
+ * everything anyways... this should be safe.
+ */
+ apr_status_t rv;
+ if (ap_allow_options(rnew) & OPT_SYM_LINKS) {
+ if (((rv = apr_stat(&rnew->finfo, rnew->filename,
+ APR_FINFO_MIN, rnew->pool)) != APR_SUCCESS)
+ && (rv != APR_INCOMPLETE)) {
+ rnew->finfo.filetype = APR_NOFILE;
+ }
+ }
+ else {
+ if (((rv = apr_stat(&rnew->finfo, rnew->filename,
+ APR_FINFO_LINK | APR_FINFO_MIN,
+ rnew->pool)) != APR_SUCCESS)
+ && (rv != APR_INCOMPLETE)) {
+ rnew->finfo.filetype = APR_NOFILE;
+ }
+ }
+ }
+ else {
+ memcpy(&rnew->finfo, dirent, sizeof(apr_finfo_t));
+ }
+
+ if (rnew->finfo.filetype == APR_LNK) {
+ /*
+ * Resolve this symlink. We should tie this back to dir_walk's cache
+ */
+ if ((res = resolve_symlink(rnew->filename, &rnew->finfo,
+ ap_allow_options(rnew), rnew->pool))
+ != OK) {
+ rnew->status = res;
+ return rnew;
+ }
+ }
+
+ if (rnew->finfo.filetype == APR_DIR) {
+ /* ap_make_full_path overallocated the buffers
+ * by one character to help us out here.
+ */
+ strcat(rnew->filename, "/");
+ if (!rnew->path_info || !*rnew->path_info) {
+ strcat(rnew->uri, "/");
+ }
+ }
+
+ /* fill in parsed_uri values
+ */
+ if (r->args && *r->args && (subtype == AP_SUBREQ_MERGE_ARGS)) {
+ ap_parse_uri(rnew, apr_pstrcat(r->pool, rnew->uri, "?",
+ r->args, NULL));
+ }
+ else {
+ ap_parse_uri(rnew, rnew->uri);
+ }
+
+ /* We cannot return NULL without violating the API. So just turn this
+ * subrequest into a 500. */
+ if (ap_is_recursion_limit_exceeded(r)) {
+ rnew->status = HTTP_INTERNAL_SERVER_ERROR;
+ return rnew;
+ }
+
+ if ((res = ap_process_request_internal(rnew))) {
+ rnew->status = res;
+ }
+
+ return rnew;
+}
+
+AP_DECLARE(request_rec *) ap_sub_req_lookup_file(const char *new_file,
+ const request_rec *r,
+ ap_filter_t *next_filter)
+{
+ request_rec *rnew;
+ int res;
+ char *fdir;
+ apr_size_t fdirlen;
+
+ rnew = make_sub_request(r, next_filter);
+
+ fdir = ap_make_dirstr_parent(rnew->pool, r->filename);
+ fdirlen = strlen(fdir);
+
+ /* Translate r->filename, if it was canonical, it stays canonical
+ */
+ if (r->canonical_filename == r->filename) {
+ rnew->canonical_filename = (char*)(1);
+ }
+
+ if (apr_filepath_merge(&rnew->filename, fdir, new_file,
+ APR_FILEPATH_TRUENAME, rnew->pool) != APR_SUCCESS) {
+ rnew->status = HTTP_FORBIDDEN;
+ return rnew;
+ }
+
+ if (rnew->canonical_filename) {
+ rnew->canonical_filename = rnew->filename;
+ }
+
+ /*
+ * Check for a special case... if there are no '/' characters in new_file
+ * at all, and the path was the same, then we are looking at a relative
+ * lookup in the same directory. Fixup the URI to match.
+ */
+
+ if (strncmp(rnew->filename, fdir, fdirlen) == 0
+ && rnew->filename[fdirlen]
+ && ap_strchr_c(rnew->filename + fdirlen, '/') == NULL) {
+ apr_status_t rv;
+ if (ap_allow_options(rnew) & OPT_SYM_LINKS) {
+ if (((rv = apr_stat(&rnew->finfo, rnew->filename,
+ APR_FINFO_MIN, rnew->pool)) != APR_SUCCESS)
+ && (rv != APR_INCOMPLETE)) {
+ rnew->finfo.filetype = APR_NOFILE;
+ }
+ }
+ else {
+ if (((rv = apr_stat(&rnew->finfo, rnew->filename,
+ APR_FINFO_LINK | APR_FINFO_MIN,
+ rnew->pool)) != APR_SUCCESS)
+ && (rv != APR_INCOMPLETE)) {
+ rnew->finfo.filetype = APR_NOFILE;
+ }
+ }
+
+ if (r->uri && *r->uri) {
+ char *udir = ap_make_dirstr_parent(rnew->pool, r->uri);
+ rnew->uri = ap_make_full_path(rnew->pool, udir,
+ rnew->filename + fdirlen);
+ ap_parse_uri(rnew, rnew->uri); /* fill in parsed_uri values */
+ }
+ else {
+ ap_parse_uri(rnew, new_file); /* fill in parsed_uri values */
+ rnew->uri = apr_pstrdup(rnew->pool, "");
+ }
+ }
+ else {
+ /* XXX: @@@: What should be done with the parsed_uri values?
+ * We would be better off stripping down to the 'common' elements
+ * of the path, then reassembling the URI as best as we can.
+ */
+ ap_parse_uri(rnew, new_file); /* fill in parsed_uri values */
+ /*
+ * XXX: this should be set properly like it is in the same-dir case
+ * but it's actually sometimes to impossible to do it... because the
+ * file may not have a uri associated with it -djg
+ */
+ rnew->uri = apr_pstrdup(rnew->pool, "");
+ }
+
+ /* We cannot return NULL without violating the API. So just turn this
+ * subrequest into a 500. */
+ if (ap_is_recursion_limit_exceeded(r)) {
+ rnew->status = HTTP_INTERNAL_SERVER_ERROR;
+ return rnew;
+ }
+
+ if ((res = ap_process_request_internal(rnew))) {
+ rnew->status = res;
+ }
+
+ return rnew;
+}
+
+AP_DECLARE(int) ap_run_sub_req(request_rec *r)
+{
+ int retval = DECLINED;
+ /* Run the quick handler if the subrequest is not a dirent or file
+ * subrequest
+ */
+ if (!(r->filename && r->finfo.filetype != APR_NOFILE)) {
+ retval = ap_run_quick_handler(r, 0);
+ }
+ if (retval != OK) {
+ retval = ap_invoke_handler(r);
+ if (retval == DONE) {
+ retval = OK;
+ }
+ }
+ ap_finalize_sub_req_protocol(r);
+ return retval;
+}
+
+AP_DECLARE(void) ap_destroy_sub_req(request_rec *r)
+{
+ /* Reclaim the space */
+ apr_pool_destroy(r->pool);
+}
+
+/*
+ * Function to set the r->mtime field to the specified value if it's later
+ * than what's already there.
+ */
+AP_DECLARE(void) ap_update_mtime(request_rec *r, apr_time_t dependency_mtime)
+{
+ if (r->mtime < dependency_mtime) {
+ r->mtime = dependency_mtime;
+ }
+}
+
+/*
+ * Is it the initial main request, which we only get *once* per HTTP request?
+ */
+AP_DECLARE(int) ap_is_initial_req(request_rec *r)
+{
+ return (r->main == NULL) /* otherwise, this is a sub-request */
+ && (r->prev == NULL); /* otherwise, this is an internal redirect */
+}
+