Commit message: SECURITY: CVE-2015-3185 (cve.mitre.org)

Replacement of ap_some_auth_required (unusable in Apache httpd 2.4)
with new ap_some_authn_required and ap_force_authn hook.

Submitted by: breser


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1684524 13f79535-47bb-0310-9956-ffa450edef68
CVE: CVE-2015-3185
CWE: CWE-284
Vulnerability description: The ap_some_auth_required function in server/request.c in the Apache HTTP Server 2.4.x before 2.4.14 does not consider that a Require directive may be associated with an authorization setting rather than an authentication setting, which allows remote attackers to bypass intended access restrictions in opportunistic circumstances by leveraging the presence of a module that relies on the 2.2 API behavior.

Project: httpd
File: request.c

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);
}

Project: httpd
File: request.c

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);
}

Project: httpd
File: request.c

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 */
}

Project: httpd
File: request.c

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;
}

Project: httpd
File: request.c

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 && opts.override_list == NULL)) {
                    break;
                }


                res = ap_parse_htaccess(&htaccess_conf, r, opts.override,
                                        opts.override_opts, opts.override_list,
                                        apr_pstrdup(r->pool, 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);
                }
                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 = 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;
}

Project: httpd
File: request.c

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;
}

Project: httpd
File: request.c

AP_DECLARE(void) ap_destroy_sub_req(request_rec *r)
{
    /* Reclaim the space */
    apr_pool_destroy(r->pool);
}

Project: httpd
File: request.c

AP_DECLARE(int) ap_process_request_internal(request_rec *r)
{
    int file_req = (r->main && r->filename);
    int access_status;
    core_dir_config *d;

    /* Ignore embedded %2F's in path for proxy requests */
    if (!r->proxyreq && r->parsed_uri.path) {
        d = ap_get_core_module_config(r->per_dir_config);
        if (d->allow_encoded_slashes) {
            access_status = ap_unescape_url_keep2f(r->parsed_uri.path, d->decode_encoded_slashes);
        }
        else {
            access_status = ap_unescape_url(r->parsed_uri.path);
        }
        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 "
                                  "(decoded='%s'), returning 404",
                                  r->parsed_uri.path);
                }
            }
            return access_status;
        }
    }

    ap_getparents(r->uri);     /* OK --- shrinking transformations... */

    /* 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 translate_name kill the request.
     */
    if (!file_req) {
        if ((access_status = ap_location_walk(r))) {
            return access_status;
        }
        if ((access_status = ap_if_walk(r))) {
            return access_status;
        }

        /* Don't set per-dir loglevel if LogLevelOverride is set */
        if (!r->connection->log) {
            d = ap_get_core_module_config(r->per_dir_config);
            if (d->log)
                r->log = d->log;
        }

        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 = ap_location_walk(r))) {
        return access_status;
    }
    if ((access_status = ap_if_walk(r))) {
        return access_status;
    }

    /* Don't set per-dir loglevel if LogLevelOverride is set */
    if (!r->connection->log) {
        d = ap_get_core_module_config(r->per_dir_config);
        if (d->log)
            r->log = d->log;
    }

    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 {
        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;
}

Project: httpd
File: request.c

AP_DECLARE(void) ap_clear_auth_internal(void)
{
    auth_internal_per_conf_hooks = 0;
    auth_internal_per_conf_providers = 0;
}

Project: httpd
File: request.c

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;
}

Project: httpd
File: request.c

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 and ap_escape_uri 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;
}

Project: httpd
File: request.c

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;
}

Project: httpd
File: request.c

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);
}

Project: httpd
File: request.c

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;
}

Project: httpd
File: request.c

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;
    }

    cache = prep_walk_cache(AP_NOTE_FILE_WALK, r);
    cached = (cache->cached != NULL);

    /* 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;
    }

    /* 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);
                    }
                    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;
}

Project: httpd
File: request.c

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;
    }
}

Project: httpd
File: request.c

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);
}

Project: httpd
File: request.c

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;
}

Project: httpd
File: request.c

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);
}

Project: httpd
File: request.c

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;
   }

}

Project: httpd
File: request.c

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;
}

Project: httpd
File: request.c

AP_DECLARE(int) ap_some_authn_required(request_rec *r)
{
    int access_status;

    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) {
            return 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) {
            return TRUE;
        }

        break;
    }

    return FALSE;
}

Project: httpd
File: request.c

AP_DECLARE(int) ap_if_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;
    int cached;
    int sec_idx;
    int matches;
    int cached_matches;
    int prev_result = -1;
    walk_walked_t *last_walk;

    if (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;

    return OK;
}

Project: httpd
File: request.c

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);

    /* 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] != '/') {
        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 = 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);
                    }
                    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;
}

Project: httpd
File: request.c

AP_DECLARE(void) ap_update_mtime(request_rec *r, apr_time_t dependency_mtime)
{
    if (r->mtime < dependency_mtime) {
        r->mtime = dependency_mtime;
    }
}

Project: httpd
File: request.c

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);
}

Project: httpd
File: request.c

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;
}

Project: httpd
File: request.c

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) {
        /* 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;
        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;
}