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- /* ====================================================================
- * Copyright (c) 1995-1999 The Apache Group. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * 4. The names "Apache Server" and "Apache Group" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache"
- * nor may "Apache" appear in their names without prior written
- * permission of the Apache Group.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Group and was originally based
- * on public domain software written at the National Center for
- * Supercomputing Applications, University of Illinois, Urbana-Champaign.
- * For more information on the Apache Group and the Apache HTTP server
- * project, please see <http://www.apache.org/>.
- *
- */
-
- /*
- * http_request.c: functions to get and process requests
- *
- * Rob McCool 3/21/93
- *
- * Thoroughly revamped by rst for Apache. NB this file reads
- * best from the bottom up.
- *
- */
-
- #define CORE_PRIVATE
- #include "httpd.h"
- #include "http_config.h"
- #include "http_request.h"
- #include "http_core.h"
- #include "http_protocol.h"
- #include "http_conf_globals.h" /* for ap_extended_status */
- #include "http_log.h"
- #include "http_main.h"
- #include "scoreboard.h"
- #include "fnmatch.h"
-
- /*****************************************************************
- *
- * 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.
- */
-
- /*
- * We don't want people able to serve up pipes, or unix sockets, or other
- * scary things. Note that symlink tests are performed later.
- */
- static int check_safe_file(request_rec *r)
- {
- if (r->finfo.st_mode == 0 /* doesn't exist */
- || S_ISDIR(r->finfo.st_mode)
- || S_ISREG(r->finfo.st_mode)
- || S_ISLNK(r->finfo.st_mode)) {
- return OK;
- }
- ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, r,
- "object is not a file, directory or symlink: %s",
- r->filename);
- return HTTP_FORBIDDEN;
- }
-
-
- static int check_symlinks(char *d, int opts)
- {
- #if defined(OS2) || defined(WIN32)
- /* OS/2 doesn't have symlinks */
- return OK;
- #else
- struct stat lfi, fi;
- char *lastp;
- int res;
-
- if (opts & OPT_SYM_LINKS)
- return OK;
-
- /*
- * Strip trailing '/', if any, off what we're checking; trailing slashes
- * make some systems follow symlinks to directories even in lstat().
- * After we've done the lstat, put it back. Also, don't bother checking
- * '/' at all...
- *
- * Note that we don't have to worry about multiple slashes here because of
- * no2slash() below...
- */
-
- lastp = d + strlen(d) - 1;
- if (lastp == d)
- return OK; /* Root directory, '/' */
-
- if (*lastp == '/')
- *lastp = '\0';
- else
- lastp = NULL;
-
- res = lstat(d, &lfi);
-
- if (lastp)
- *lastp = '/';
-
- /*
- * Note that we don't reject accesses to nonexistent files (multiviews or
- * the like may cons up a way to run the transaction anyway)...
- */
-
- if (!(res >= 0) || !S_ISLNK(lfi.st_mode))
- return OK;
-
- /* OK, it's a symlink. May still be OK with OPT_SYM_OWNER */
-
- if (!(opts & OPT_SYM_OWNER))
- return HTTP_FORBIDDEN;
-
- if (stat(d, &fi) < 0)
- return HTTP_FORBIDDEN;
-
- return (fi.st_uid == lfi.st_uid) ? OK : HTTP_FORBIDDEN;
-
- #endif
- }
-
- /* Dealing with the file system to get PATH_INFO
- */
- static int get_path_info(request_rec *r)
- {
- char *cp;
- char *path = r->filename;
- char *end = &path[strlen(path)];
- char *last_cp = NULL;
- int rv;
- #ifdef WIN32
- BOOL bStripSlash=TRUE;
- #endif
-
- if (r->finfo.st_mode) {
- /* assume path_info already set */
- return OK;
- }
-
- #ifdef WIN32
- /* If the directory is x:\, then we don't want to strip
- * the trailing slash since x: is not a valid directory.
- */
- if (strlen(path) == 3 && path[1] == ':' && path[2] == '/')
- bStripSlash = FALSE;
-
-
- /* If UNC name == //machine/share/, do not
- * advance over the trailing slash. Any other
- * UNC name is OK to strip the slash.
- */
- cp = end;
- if (strlen(path) > 2 && path[0] == '/' && path[1] == '/' &&
- path[2] != '/' && cp[-1] == '/') {
- char *p;
- int iCount=0;
- p = path;
- while (p = strchr(p,'/')) {
- p++;
- iCount++;
- }
-
- if (iCount == 4)
- bStripSlash = FALSE;
- }
-
- if (bStripSlash)
- #endif
- /* Advance over trailing slashes ... NOT part of filename
- * if file is not a UNC name (Win32 only).
- */
- for (cp = end; cp > path && cp[-1] == '/'; --cp)
- continue;
-
-
- while (cp > path) {
-
- /* See if the pathname ending here exists... */
-
- *cp = '\0';
-
- /* We must not stat() filenames that may cause os-specific system
- * problems, such as "/file/aux" on DOS-abused filesystems.
- * So pretend that they do not exist by returning an ENOENT error.
- * This will force us to drop that part of the path and keep
- * looking back for a "real" file that exists, while still allowing
- * the "invalid" path parts within the PATH_INFO.
- */
- if (!ap_os_is_filename_valid(path)) {
- errno = ENOENT;
- rv = -1;
- }
- else {
- errno = 0;
- rv = stat(path, &r->finfo);
- }
-
- if (cp != end)
- *cp = '/';
-
- if (!rv) {
-
- /*
- * Aha! Found something. If it was a directory, we will search
- * contents of that directory for a multi_match, so the PATH_INFO
- * argument starts with the component after that.
- */
-
- if (S_ISDIR(r->finfo.st_mode) && last_cp) {
- r->finfo.st_mode = 0; /* No such file... */
- cp = last_cp;
- }
-
- r->path_info = ap_pstrdup(r->pool, cp);
- *cp = '\0';
- return OK;
- }
- #if defined(ENOENT) && defined(ENOTDIR)
- else if (errno == ENOENT || errno == ENOTDIR) {
- last_cp = cp;
-
- while (--cp > path && *cp != '/')
- continue;
-
- while (cp > path && cp[-1] == '/')
- --cp;
- }
- else {
- #if defined(EACCES)
- if (errno != EACCES)
- #endif
- ap_log_rerror(APLOG_MARK, APLOG_ERR, r,
- "access to %s failed", r->uri);
- return HTTP_FORBIDDEN;
- }
- #else
- #error ENOENT || ENOTDIR not defined; please see the
- #error comments at this line in the source for a workaround.
- /*
- * If ENOENT || ENOTDIR is not defined in one of the your OS's
- * include files, Apache does not know how to check to see why the
- * stat() of the index file failed; there are cases where it can fail
- * even though the file exists. This means that it is possible for
- * someone to get a directory listing of a directory even though
- * there is an index (eg. index.html) file in it. If you do not have
- * a problem with this, delete the above #error lines and start the
- * compile again. If you need to do this, please submit a bug report
- * from http://www.apache.org/bug_report.html letting us know that
- * you needed to do this. Please be sure to include the operating
- * system you are using.
- */
- else {
- last_cp = cp;
-
- while (--cp > path && *cp != '/')
- continue;
-
- while (cp > path && cp[-1] == '/')
- --cp;
- }
- #endif /* ENOENT && ENOTDIR */
- }
- return OK;
- }
-
- static int directory_walk(request_rec *r)
- {
- core_server_config *sconf = ap_get_module_config(r->server->module_config,
- &core_module);
- void *per_dir_defaults = r->server->lookup_defaults;
- void **sec = (void **) sconf->sec->elts;
- int num_sec = sconf->sec->nelts;
- char *test_filename;
- char *test_dirname;
- int res;
- unsigned i, num_dirs, iStart;
- int j, test_filename_len;
-
- /*
- * Are we dealing with a file? If not, we can (hopefuly) safely assume we
- * have a handler that doesn't require one, but for safety's sake, and so
- * we have something find_types() can get something out of, fake one. But
- * don't run through the directory entries.
- */
-
- if (r->filename == NULL) {
- r->filename = ap_pstrdup(r->pool, r->uri);
- r->finfo.st_mode = 0; /* Not really a file... */
- r->per_dir_config = per_dir_defaults;
-
- return OK;
- }
-
- /*
- * 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. If either of these things fails, we could poke
- * around, see why, and adjust the lookup_rec accordingly --- this might
- * save us a call to get_path_info (with the attendant stat()s); however,
- * for the moment, that's not worth the trouble.
- *
- * Fake filenames (i.e. proxy:) only match Directory sections.
- */
-
- if (!ap_os_is_path_absolute(r->filename))
- {
- void *this_conf, *entry_config;
- core_dir_config *entry_core;
- char *entry_dir;
-
- for (j = 0; j < num_sec; ++j) {
-
- entry_config = sec[j];
-
- entry_core = (core_dir_config *)
- ap_get_module_config(entry_config, &core_module);
- entry_dir = entry_core->d;
-
- this_conf = NULL;
- if (entry_core->r) {
- if (!regexec(entry_core->r, r->filename, 0, NULL, 0))
- this_conf = entry_config;
- }
- else if (entry_core->d_is_fnmatch) {
- if (!ap_fnmatch(entry_dir, r->filename, 0))
- this_conf = entry_config;
- }
- else if (!strncmp(r->filename, entry_dir, strlen(entry_dir)))
- this_conf = entry_config;
-
- if (this_conf)
- per_dir_defaults = ap_merge_per_dir_configs(r->pool,
- per_dir_defaults,
- this_conf);
- }
-
- r->per_dir_config = per_dir_defaults;
-
- return OK;
- }
-
- r->filename = ap_os_case_canonical_filename(r->pool, r->filename);
-
- res = get_path_info(r);
- if (res != OK) {
- return res;
- }
-
- r->filename = ap_os_canonical_filename(r->pool, r->filename);
-
- test_filename = ap_pstrdup(r->pool, r->filename);
-
- ap_no2slash(test_filename);
- num_dirs = ap_count_dirs(test_filename);
-
- if (!ap_os_is_filename_valid(r->filename)) {
- ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, r,
- "Filename is not valid: %s", r->filename);
- return HTTP_FORBIDDEN;
- }
-
- if ((res = check_safe_file(r))) {
- return res;
- }
-
- test_filename_len = strlen(test_filename);
- if (test_filename[test_filename_len - 1] == '/')
- --num_dirs;
-
- if (S_ISDIR(r->finfo.st_mode))
- ++num_dirs;
-
- /*
- * We will use test_dirname as scratch space while we build directory
- * names during the walk. Profiling shows directory_walk to be a busy
- * function so we try to avoid allocating lots of extra memory here.
- * We need 2 extra bytes, one for trailing \0 and one because
- * make_dirstr_prefix will add potentially one extra /.
- */
- test_dirname = ap_palloc(r->pool, test_filename_len + 2);
-
- iStart = 1;
- #ifdef WIN32
- /* If the name is a UNC name, then do not walk through the
- * machine and share name (e.g. \\machine\share\)
- */
- if (num_dirs > 3 && test_filename[0] == '/' && test_filename[1] == '/')
- iStart = 4;
- #endif
-
- /* j keeps track of which section we're on, see core_reorder_directories */
- j = 0;
- for (i = iStart; i <= num_dirs; ++i) {
- int overrides_here;
- core_dir_config *core_dir = (core_dir_config *)
- ap_get_module_config(per_dir_defaults, &core_module);
-
- /*
- * XXX: this could be made faster by only copying the next component
- * rather than copying the entire thing all over.
- */
- ap_make_dirstr_prefix(test_dirname, test_filename, i);
-
- /*
- * Do symlink checks first, because they are done with the
- * permissions appropriate to the *parent* directory...
- */
-
- if ((res = check_symlinks(test_dirname, core_dir->opts))) {
- ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, r,
- "Symbolic link not allowed: %s", test_dirname);
- return res;
- }
-
- /*
- * Begin *this* level by looking for matching <Directory> sections
- * from access.conf.
- */
-
- for (; j < num_sec; ++j) {
- void *entry_config = sec[j];
- core_dir_config *entry_core;
- char *entry_dir;
- void *this_conf;
-
- entry_core = (core_dir_config *)
- ap_get_module_config(entry_config, &core_module);
- entry_dir = entry_core->d;
-
- if (entry_core->r
- || !ap_os_is_path_absolute(entry_dir)
- || entry_core->d_components > i)
- break;
-
- this_conf = NULL;
- if (entry_core->d_is_fnmatch) {
- if (!ap_fnmatch(entry_dir, test_dirname, FNM_PATHNAME)) {
- this_conf = entry_config;
- }
- }
- else if (!strcmp(test_dirname, entry_dir))
- this_conf = entry_config;
-
- if (this_conf) {
- per_dir_defaults = ap_merge_per_dir_configs(r->pool,
- per_dir_defaults,
- this_conf);
- core_dir = (core_dir_config *)
- ap_get_module_config(per_dir_defaults, &core_module);
- }
- }
- overrides_here = core_dir->override;
-
- /* If .htaccess files are enabled, check for one. */
-
- if (overrides_here) {
- void *htaccess_conf = NULL;
-
- res = ap_parse_htaccess(&htaccess_conf, r, overrides_here,
- ap_pstrdup(r->pool, test_dirname),
- sconf->access_name);
- if (res)
- return res;
-
- if (htaccess_conf) {
- per_dir_defaults = ap_merge_per_dir_configs(r->pool,
- per_dir_defaults,
- htaccess_conf);
- r->per_dir_config = per_dir_defaults;
- }
- }
- }
-
- /*
- * There's two types of IS_SPECIAL sections (see http_core.c), and we've
- * already handled the proxy:-style stuff. Now we'll deal with the
- * regexes.
- */
- for (; j < num_sec; ++j) {
- void *entry_config = sec[j];
- core_dir_config *entry_core;
-
- entry_core = (core_dir_config *)
- ap_get_module_config(entry_config, &core_module);
-
- if (entry_core->r) {
- if (!regexec(entry_core->r, test_dirname, 0, NULL, REG_NOTEOL)) {
- per_dir_defaults =
- ap_merge_per_dir_configs(r->pool, per_dir_defaults,
- entry_config);
- }
- }
- }
- r->per_dir_config = per_dir_defaults;
-
- /*
- * Symlink permissions are determined by the parent. If the request is
- * for a directory then applying the symlink test here would use the
- * permissions of the directory as opposed to its parent. Consider a
- * symlink pointing to a dir with a .htaccess disallowing symlinks. If
- * you access /symlink (or /symlink/) you would get a 403 without this
- * S_ISDIR test. But if you accessed /symlink/index.html, for example,
- * you would *not* get the 403.
- */
- if (!S_ISDIR(r->finfo.st_mode)
- && (res = check_symlinks(r->filename, ap_allow_options(r)))) {
- ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, r,
- "Symbolic link not allowed: %s", r->filename);
- return res;
- }
- return OK; /* Can only "fail" if access denied by the
- * symlink goop. */
- }
-
- static int location_walk(request_rec *r)
- {
- core_server_config *sconf = ap_get_module_config(r->server->module_config,
- &core_module);
- void *per_dir_defaults = r->per_dir_config;
- void **url = (void **) sconf->sec_url->elts;
- int len, num_url = sconf->sec_url->nelts;
- char *test_location;
- void *this_conf, *entry_config;
- core_dir_config *entry_core;
- char *entry_url;
- int j;
-
- if (!num_url) {
- return OK;
- }
-
- /* Location and LocationMatch differ on their behaviour w.r.t. multiple
- * slashes. Location matches multiple slashes with a single slash,
- * LocationMatch doesn't. An exception, for backwards brokenness is
- * absoluteURIs... in which case neither match multiple slashes.
- */
- if (r->uri[0] != '/') {
- test_location = r->uri;
- }
- else {
- test_location = ap_pstrdup(r->pool, r->uri);
- ap_no2slash(test_location);
- }
-
- /* Go through the location entries, and check for matches. */
-
- /* we apply the directive sections in some order;
- * should really try them with the most general first.
- */
- for (j = 0; j < num_url; ++j) {
-
- entry_config = url[j];
-
- entry_core = (core_dir_config *)
- ap_get_module_config(entry_config, &core_module);
- entry_url = entry_core->d;
-
- len = strlen(entry_url);
-
- this_conf = NULL;
-
- if (entry_core->r) {
- if (!regexec(entry_core->r, r->uri, 0, NULL, 0))
- this_conf = entry_config;
- }
- else if (entry_core->d_is_fnmatch) {
- if (!ap_fnmatch(entry_url, test_location, FNM_PATHNAME)) {
- this_conf = entry_config;
- }
- }
- else if (!strncmp(test_location, entry_url, len) &&
- (entry_url[len - 1] == '/' ||
- test_location[len] == '/' || test_location[len] == '\0'))
- this_conf = entry_config;
-
- if (this_conf)
- per_dir_defaults = ap_merge_per_dir_configs(r->pool,
- per_dir_defaults, this_conf);
- }
- r->per_dir_config = per_dir_defaults;
-
- return OK;
- }
-
- static int file_walk(request_rec *r)
- {
- core_dir_config *conf = ap_get_module_config(r->per_dir_config, &core_module);
- void *per_dir_defaults = r->per_dir_config;
- void **file = (void **) conf->sec->elts;
- int num_files = conf->sec->nelts;
- char *test_file;
-
- /* get the basename */
- test_file = strrchr(r->filename, '/');
- if (test_file == NULL) {
- test_file = r->filename;
- }
- else {
- ++test_file;
- }
-
- /* Go through the file entries, and check for matches. */
-
- if (num_files) {
- void *this_conf, *entry_config;
- core_dir_config *entry_core;
- char *entry_file;
- int j;
-
- /* we apply the directive sections in some order;
- * should really try them with the most general first.
- */
- for (j = 0; j < num_files; ++j) {
-
- entry_config = file[j];
-
- entry_core = (core_dir_config *)
- ap_get_module_config(entry_config, &core_module);
- entry_file = entry_core->d;
-
- this_conf = NULL;
-
- if (entry_core->r) {
- if (!regexec(entry_core->r, test_file, 0, NULL, 0))
- this_conf = entry_config;
- }
- else if (entry_core->d_is_fnmatch) {
- if (!ap_fnmatch(entry_file, test_file, FNM_PATHNAME)) {
- this_conf = entry_config;
- }
- }
- else if (!strcmp(test_file, entry_file)) {
- this_conf = entry_config;
- }
-
- if (this_conf)
- per_dir_defaults = ap_merge_per_dir_configs(r->pool,
- per_dir_defaults,
- this_conf);
- }
- r->per_dir_config = per_dir_defaults;
- }
- return OK;
- }
-
- /*****************************************************************
- *
- * 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)
- {
- pool *rrp = ap_make_sub_pool(r->pool);
- request_rec *rr = ap_pcalloc(rrp, sizeof(request_rec));
-
- rr->pool = rrp;
- return rr;
- }
-
- API_EXPORT(request_rec *) ap_sub_req_lookup_uri(const char *new_file,
- const request_rec *r)
- {
- request_rec *rnew;
- int res;
- char *udir;
-
- rnew = make_sub_request(r);
- rnew->hostname = r->hostname;
- rnew->request_time = r->request_time;
- rnew->connection = r->connection;
- rnew->server = r->server;
- rnew->request_config = ap_create_request_config(rnew->pool);
- rnew->htaccess = r->htaccess;
- rnew->per_dir_config = r->server->lookup_defaults;
-
- ap_set_sub_req_protocol(rnew, r);
-
- if (new_file[0] == '/')
- ap_parse_uri(rnew, new_file);
- 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_file));
- }
-
- res = ap_unescape_url(rnew->uri);
- if (res) {
- rnew->status = res;
- return rnew;
- }
-
- ap_getparents(rnew->uri);
-
- if ((res = location_walk(rnew))) {
- rnew->status = res;
- return rnew;
- }
-
- res = ap_translate_name(rnew);
- if (res) {
- rnew->status = res;
- return rnew;
- }
-
- /*
- * We could be clever at this point, and avoid calling directory_walk,
- * etc. However, we'd need to test that the old and new filenames contain
- * the same directory components, so it would require duplicating the
- * start of translate_name. Instead we rely on the cache of .htaccess
- * results.
- *
- * NB: directory_walk() clears the per_dir_config, so we don't inherit
- * from location_walk() above
- */
-
- if ((res = directory_walk(rnew))
- || (res = file_walk(rnew))
- || (res = location_walk(rnew))
- || ((ap_satisfies(rnew) == SATISFY_ALL
- || ap_satisfies(rnew) == SATISFY_NOSPEC)
- ? ((res = ap_check_access(rnew))
- || (ap_some_auth_required(rnew)
- && ((res = ap_check_user_id(rnew))
- || (res = ap_check_auth(rnew)))))
- : ((res = ap_check_access(rnew))
- && (!ap_some_auth_required(rnew)
- || ((res = ap_check_user_id(rnew))
- || (res = ap_check_auth(rnew)))))
- )
- || (res = ap_find_types(rnew))
- || (res = ap_run_fixups(rnew))
- ) {
- rnew->status = res;
- }
- return rnew;
- }
-
- API_EXPORT(request_rec *) ap_sub_req_lookup_file(const char *new_file,
- const request_rec *r)
- {
- request_rec *rnew;
- int res;
- char *fdir;
-
- rnew = make_sub_request(r);
- rnew->hostname = r->hostname;
- rnew->request_time = r->request_time;
- rnew->connection = r->connection;
- rnew->server = r->server;
- rnew->request_config = ap_create_request_config(rnew->pool);
- rnew->htaccess = r->htaccess;
-
- ap_set_sub_req_protocol(rnew, r);
- fdir = ap_make_dirstr_parent(rnew->pool, r->filename);
-
- /*
- * Check for a special case... if there are no '/' characters in new_file
- * at all, then we are looking at a relative lookup in the same
- * directory. That means we won't have to redo directory_walk, and we may
- * not even have to redo access checks.
- */
-
- if (strchr(new_file, '/') == NULL) {
- char *udir = ap_make_dirstr_parent(rnew->pool, r->uri);
-
- rnew->uri = ap_make_full_path(rnew->pool, udir, new_file);
- rnew->filename = ap_make_full_path(rnew->pool, fdir, new_file);
- ap_parse_uri(rnew, rnew->uri); /* fill in parsed_uri values */
- if (stat(rnew->filename, &rnew->finfo) < 0) {
- rnew->finfo.st_mode = 0;
- }
-
- if ((res = check_safe_file(rnew))) {
- rnew->status = res;
- return rnew;
- }
-
- rnew->per_dir_config = r->per_dir_config;
-
- /*
- * no matter what, if it's a subdirectory, we need to re-run
- * directory_walk
- */
- if (S_ISDIR(rnew->finfo.st_mode)) {
- res = directory_walk(rnew);
- if (!res) {
- res = file_walk(rnew);
- }
- }
- else {
- if ((res = check_symlinks(rnew->filename, ap_allow_options(rnew)))) {
- ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, rnew,
- "Symbolic link not allowed: %s", rnew->filename);
- rnew->status = res;
- return rnew;
- }
- /*
- * do a file_walk, if it doesn't change the per_dir_config then
- * we know that we don't have to redo all the access checks
- */
- if ((res = file_walk(rnew))) {
- rnew->status = res;
- return rnew;
- }
- if (rnew->per_dir_config == r->per_dir_config) {
- if ((res = ap_find_types(rnew)) || (res = ap_run_fixups(rnew))) {
- rnew->status = res;
- }
- return rnew;
- }
- }
- }
- else {
- /* XXX: @@@: What should be done with the parsed_uri values? */
- 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 = "INTERNALLY GENERATED file-relative req";
- rnew->filename = ((ap_os_is_path_absolute(new_file)) ?
- ap_pstrdup(rnew->pool, new_file) :
- ap_make_full_path(rnew->pool, fdir, new_file));
- rnew->per_dir_config = r->server->lookup_defaults;
- res = directory_walk(rnew);
- if (!res) {
- res = file_walk(rnew);
- }
- }
-
- if (res
- || ((ap_satisfies(rnew) == SATISFY_ALL
- || ap_satisfies(rnew) == SATISFY_NOSPEC)
- ? ((res = ap_check_access(rnew))
- || (ap_some_auth_required(rnew)
- && ((res = ap_check_user_id(rnew))
- || (res = ap_check_auth(rnew)))))
- : ((res = ap_check_access(rnew))
- && (!ap_some_auth_required(rnew)
- || ((res = ap_check_user_id(rnew))
- || (res = ap_check_auth(rnew)))))
- )
- || (res = ap_find_types(rnew))
- || (res = ap_run_fixups(rnew))
- ) {
- rnew->status = res;
- }
- return rnew;
- }
-
- API_EXPORT(int) ap_run_sub_req(request_rec *r)
- {
- #ifndef CHARSET_EBCDIC
- int retval = ap_invoke_handler(r);
- #else /*CHARSET_EBCDIC*/
- /* Save the EBCDIC conversion setting of the caller across subrequests */
- int convert = ap_bgetflag(r->connection->client, B_EBCDIC2ASCII);
- int retval = ap_invoke_handler(r);
- ap_bsetflag(r->connection->client, B_EBCDIC2ASCII, convert);
- #endif /*CHARSET_EBCDIC*/
- ap_finalize_sub_req_protocol(r);
- return retval;
- }
-
- API_EXPORT(void) ap_destroy_sub_req(request_rec *r)
- {
- /* Reclaim the space */
- ap_destroy_pool(r->pool);
- }
-
- /*****************************************************************
- *
- * Mainline request processing...
- */
-
- API_EXPORT(void) ap_die(int type, request_rec *r)
- {
- int error_index = ap_index_of_response(type);
- char *custom_response = ap_response_code_string(r, error_index);
- int recursive_error = 0;
-
- if (type == DONE) {
- ap_finalize_request_protocol(r);
- return;
- }
-
- /*
- * The following takes care of Apache redirects to custom response URLs
- * Note that if we are already dealing with the response to some other
- * error condition, we just report on the original error, and give up on
- * any attempt to handle the other thing "intelligently"...
- */
-
- if (r->status != HTTP_OK) {
- recursive_error = type;
-
- while (r->prev && (r->prev->status != HTTP_OK))
- r = r->prev; /* Get back to original error */
-
- type = r->status;
- custom_response = NULL; /* Do NOT retry the custom thing! */
- }
-
- r->status = type;
-
- /*
- * This test is done here so that none of the auth modules needs to know
- * about proxy authentication. They treat it like normal auth, and then
- * we tweak the status.
- */
- if (r->status == AUTH_REQUIRED && r->proxyreq) {
- r->status = HTTP_PROXY_AUTHENTICATION_REQUIRED;
- }
-
- /*
- * If we want to keep the connection, be sure that the request body
- * (if any) has been read.
- */
- if ((r->status != HTTP_NOT_MODIFIED) && (r->status != HTTP_NO_CONTENT)
- && !ap_status_drops_connection(r->status)
- && r->connection && (r->connection->keepalive != -1)) {
-
- (void) ap_discard_request_body(r);
- }
-
- /*
- * Two types of custom redirects --- plain text, and URLs. Plain text has
- * a leading '"', so the URL code, here, is triggered on its absence
- */
-
- if (custom_response && custom_response[0] != '"') {
-
- if (ap_is_url(custom_response)) {
- /*
- * The URL isn't local, so lets drop through the rest of this
- * apache code, and continue with the usual REDIRECT handler.
- * But note that the client will ultimately see the wrong
- * status...
- */
- r->status = REDIRECT;
- ap_table_setn(r->headers_out, "Location", custom_response);
- }
- else if (custom_response[0] == '/') {
- const char *error_notes;
- r->no_local_copy = 1; /* Do NOT send USE_LOCAL_COPY for
- * error documents! */
- /*
- * This redirect needs to be a GET no matter what the original
- * method was.
- */
- ap_table_setn(r->subprocess_env, "REQUEST_METHOD", r->method);
-
- /*
- * Provide a special method for modules to communicate
- * more informative (than the plain canned) messages to us.
- * Propagate them to ErrorDocuments via the ERROR_NOTES variable:
- */
- if ((error_notes = ap_table_get(r->notes, "error-notes")) != NULL) {
- ap_table_setn(r->subprocess_env, "ERROR_NOTES", error_notes);
- }
- r->method = ap_pstrdup(r->pool, "GET");
- r->method_number = M_GET;
- ap_internal_redirect(custom_response, r);
- return;
- }
- else {
- /*
- * Dumb user has given us a bad url to redirect to --- fake up
- * dying with a recursive server error...
- */
- recursive_error = SERVER_ERROR;
- ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, r,
- "Invalid error redirection directive: %s",
- custom_response);
- }
- }
- ap_send_error_response(r, recursive_error);
- }
-
- static void decl_die(int status, char *phase, request_rec *r)
- {
- if (status == DECLINED) {
- ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_CRIT, r,
- "configuration error: couldn't %s: %s", phase, r->uri);
- ap_die(SERVER_ERROR, r);
- }
- else
- ap_die(status, r);
- }
-
- API_EXPORT(int) ap_some_auth_required(request_rec *r)
- {
- /* Is there a require line configured for the type of *this* req? */
-
- const array_header *reqs_arr = ap_requires(r);
- require_line *reqs;
- int i;
-
- if (!reqs_arr)
- return 0;
-
- reqs = (require_line *) reqs_arr->elts;
-
- for (i = 0; i < reqs_arr->nelts; ++i)
- if (reqs[i].method_mask & (1 << r->method_number))
- return 1;
-
- return 0;
- }
-
- static void process_request_internal(request_rec *r)
- {
- int access_status;
-
- /* Ignore embedded %2F's in path for proxy requests */
- if (!r->proxyreq && r->parsed_uri.path) {
- access_status = ap_unescape_url(r->parsed_uri.path);
- if (access_status) {
- ap_die(access_status, r);
- return;
- }
- }
-
- ap_getparents(r->uri); /* OK --- shrinking transformations... */
-
- if ((access_status = location_walk(r))) {
- ap_die(access_status, r);
- return;
- }
-
- if ((access_status = ap_translate_name(r))) {
- decl_die(access_status, "translate", r);
- return;
- }
-
- if (!r->proxyreq) {
- /*
- * We don't want TRACE to run through the normal handler set, we
- * handle it specially.
- */
- if (r->method_number == M_TRACE) {
- if ((access_status = ap_send_http_trace(r)))
- ap_die(access_status, r);
- else
- ap_finalize_request_protocol(r);
- return;
- }
- }
-
- if (r->proto_num > HTTP_VERSION(1,0) && ap_table_get(r->subprocess_env, "downgrade-1.0")) {
- r->proto_num = HTTP_VERSION(1,0);
- }
-
- /*
- * NB: directory_walk() clears the per_dir_config, so we don't inherit
- * from location_walk() above
- */
-
- if ((access_status = directory_walk(r))) {
- ap_die(access_status, r);
- return;
- }
-
- if ((access_status = file_walk(r))) {
- ap_die(access_status, r);
- return;
- }
-
- if ((access_status = location_walk(r))) {
- ap_die(access_status, r);
- return;
- }
-
- if ((access_status = ap_header_parse(r))) {
- ap_die(access_status, r);
- return;
- }
-
- switch (ap_satisfies(r)) {
- case SATISFY_ALL:
- case SATISFY_NOSPEC:
- if ((access_status = ap_check_access(r)) != 0) {
- decl_die(access_status, "check access", r);
- return;
- }
- if (ap_some_auth_required(r)) {
- if (((access_status = ap_check_user_id(r)) != 0) || !ap_auth_type(r)) {
- decl_die(access_status, ap_auth_type(r)
- ? "check user. No user file?"
- : "perform authentication. AuthType not set!", r);
- return;
- }
- if (((access_status = ap_check_auth(r)) != 0) || !ap_auth_type(r)) {
- decl_die(access_status, ap_auth_type(r)
- ? "check access. No groups file?"
- : "perform authentication. AuthType not set!", r);
- return;
- }
- }
- break;
- case SATISFY_ANY:
- if (((access_status = ap_check_access(r)) != 0) || !ap_auth_type(r)) {
- if (!ap_some_auth_required(r)) {
- decl_die(access_status, ap_auth_type(r)
- ? "check access"
- : "perform authentication. AuthType not set!", r);
- return;
- }
- if (((access_status = ap_check_user_id(r)) != 0) || !ap_auth_type(r)) {
- decl_die(access_status, ap_auth_type(r)
- ? "check user. No user file?"
- : "perform authentication. AuthType not set!", r);
- return;
- }
- if (((access_status = ap_check_auth(r)) != 0) || !ap_auth_type(r)) {
- decl_die(access_status, ap_auth_type(r)
- ? "check access. No groups file?"
- : "perform authentication. AuthType not set!", r);
- return;
- }
- }
- break;
- }
-
- if (! (r->proxyreq
- && r->parsed_uri.scheme != NULL
- && strcmp(r->parsed_uri.scheme, "http") == 0) ) {
- if ((access_status = ap_find_types(r)) != 0) {
- decl_die(access_status, "find types", r);
- return;
- }
- }
-
- if ((access_status = ap_run_fixups(r)) != 0) {
- ap_die(access_status, r);
- return;
- }
-
- if ((access_status = ap_invoke_handler(r)) != 0) {
- ap_die(access_status, r);
- return;
- }
-
- /* Take care of little things that need to happen when we're done */
- ap_finalize_request_protocol(r);
- }
-
- void ap_process_request(request_rec *r)
- {
- int old_stat;
-
- if (ap_extended_status)
- ap_time_process_request(r->connection->child_num, START_PREQUEST);
-
- process_request_internal(r);
-
- old_stat = ap_update_child_status(r->connection->child_num,
- SERVER_BUSY_LOG, r);
-
- /*
- * We want to flush the last packet if this isn't a pipelining connection
- * *before* we start into logging. Suppose that the logging causes a DNS
- * lookup to occur, which may have a high latency. If we hold off on
- * this packet, then it'll appear like the link is stalled when really
- * it's the application that's stalled.
- */
- ap_bhalfduplex(r->connection->client);
- ap_log_transaction(r);
-
- (void) ap_update_child_status(r->connection->child_num, old_stat, r);
- if (ap_extended_status)
- ap_time_process_request(r->connection->child_num, STOP_PREQUEST);
- }
-
- static table *rename_original_env(pool *p, table *t)
- {
- array_header *env_arr = ap_table_elts(t);
- table_entry *elts = (table_entry *) env_arr->elts;
- table *new = ap_make_table(p, env_arr->nalloc);
- int i;
-
- for (i = 0; i < env_arr->nelts; ++i) {
- if (!elts[i].key)
- continue;
- ap_table_setn(new, ap_pstrcat(p, "REDIRECT_", elts[i].key, NULL),
- elts[i].val);
- }
-
- return new;
- }
-
- static request_rec *internal_internal_redirect(const char *new_uri, request_rec *r)
- {
- int access_status;
- request_rec *new = (request_rec *) ap_pcalloc(r->pool, sizeof(request_rec));
-
- new->connection = r->connection;
- new->server = r->server;
- new->pool = r->pool;
-
- /*
- * A whole lot of this really ought to be shared with http_protocol.c...
- * another missing cleanup. It's particularly inappropriate to be
- * setting header_only, etc., here.
- */
-
- new->method = r->method;
- new->method_number = r->method_number;
- ap_parse_uri(new, new_uri);
- new->request_config = ap_create_request_config(r->pool);
- new->per_dir_config = r->server->lookup_defaults;
-
- new->prev = r;
- r->next = new;
-
- /* Inherit the rest of the protocol info... */
-
- new->the_request = r->the_request;
-
- new->allowed = r->allowed;
-
- new->status = r->status;
- new->assbackwards = r->assbackwards;
- new->header_only = r->header_only;
- new->protocol = r->protocol;
- new->proto_num = r->proto_num;
- new->hostname = r->hostname;
- new->request_time = r->request_time;
- new->main = r->main;
-
- new->headers_in = r->headers_in;
- new->headers_out = ap_make_table(r->pool, 12);
- new->err_headers_out = r->err_headers_out;
- new->subprocess_env = rename_original_env(r->pool, r->subprocess_env);
- new->notes = ap_make_table(r->pool, 5);
-
- new->htaccess = r->htaccess;
- new->no_cache = r->no_cache;
- new->no_local_copy = r->no_local_copy;
- new->read_length = r->read_length; /* We can only read it once */
- new->vlist_validator = r->vlist_validator;
-
- ap_table_setn(new->subprocess_env, "REDIRECT_STATUS",
- ap_psprintf(r->pool, "%d", r->status));
-
- /*
- * XXX: hmm. This is because mod_setenvif and mod_unique_id really need
- * to do their thing on internal redirects as well. Perhaps this is a
- * misnamed function.
- */
- if ((access_status = ap_run_post_read_request(new))) {
- ap_die(access_status, new);
- return NULL;
- }
-
- return new;
- }
-
- API_EXPORT(void) ap_internal_redirect(const char *new_uri, request_rec *r)
- {
- request_rec *new = internal_internal_redirect(new_uri, r);
- process_request_internal(new);
- }
-
- /* This function is designed for things like actions or CGI scripts, when
- * using AddHandler, and you want to preserve the content type across
- * an internal redirect.
- */
- API_EXPORT(void) ap_internal_redirect_handler(const char *new_uri, request_rec *r)
- {
- request_rec *new = internal_internal_redirect(new_uri, r);
- if (r->handler)
- new->content_type = r->content_type;
- process_request_internal(new);
- }
-
- /*
- * Is it the initial main request, which we only get *once* per HTTP request?
- */
- API_EXPORT(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 */
- }
-
- /*
- * Function to set the r->mtime field to the specified value if it's later
- * than what's already there.
- */
- API_EXPORT(time_t) ap_update_mtime(request_rec *r, time_t dependency_mtime)
- {
- if (r->mtime < dependency_mtime) {
- r->mtime = dependency_mtime;
- }
- return r->mtime;
- }
-