modules/http/http_request.c

	http_request.c revision 44c46ef733836b32585d135d2d90856e7cfd9929
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse/* ====================================================================
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse * Copyright (c) 1995-1999 The Apache Group.  All rights reserved.
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse *
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse * Redistribution and use in source and binary forms, with or without
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse * modification, are permitted provided that the following conditions
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse * are met:
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse *
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse * 1. Redistributions of source code must retain the above copyright
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse *    notice, this list of conditions and the following disclaimer.
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse *
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse * 2. Redistributions in binary form must reproduce the above copyright
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse *    notice, this list of conditions and the following disclaimer in
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse *    the documentation and/or other materials provided with the
33bdcae1f7a1a65e351dda2a766a0cf28b1e695dnd *    distribution.
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse *
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse * 3. All advertising materials mentioning features or use of this
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse *    software must display the following acknowledgment:
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse *    "This product includes software developed by the Apache Group
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse *    for use in the Apache HTTP server project (http://www.apache.org/)."
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse *
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse * 4. The names "Apache Server" and "Apache Group" must not be used to
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse *    endorse or promote products derived from this software without
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse *    prior written permission. For written permission, please contact
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse *    apache@apache.org.
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse *
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse * 5. Products derived from this software may not be called "Apache"
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse *    nor may "Apache" appear in their names without prior written
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse *    permission of the Apache Group.
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse *
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse * 6. Redistributions of any form whatsoever must retain the following
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse *    acknowledgment:
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse *    "This product includes software developed by the Apache Group
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse *    for use in the Apache HTTP server project (http://www.apache.org/)."
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse *
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE APACHE GROUP OR
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse * OF THE POSSIBILITY OF SUCH DAMAGE.
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse * ====================================================================
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse *
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse * This software consists of voluntary contributions made by many
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse * individuals on behalf of the Apache Group and was originally based
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse * on public domain software written at the National Center for
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse * Supercomputing Applications, University of Illinois, Urbana-Champaign.
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse * For more information on the Apache Group and the Apache HTTP server
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse * project, please see <http://www.apache.org/>.
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse *
d86ef5503dcbc38e87c0e03cd3e1f16458cb6323rse */
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse/*
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse * http_request.c: functions to get and process requests
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse *
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse * Rob McCool 3/21/93
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse *
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse * Thoroughly revamped by rst for Apache.  NB this file reads
e18e68b42830409bf48de0df9eed3fe363664aa7aaron * best from the bottom up.
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse *
8464a9c46b967001e38fe3c8afff51a649e9de51dougm */
579fd9e90990eee18b5e504eb4c0d2ce18f76208aaron
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse#define CORE_PRIVATE
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse#include "httpd.h"
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse#include "http_config.h"
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse#include "http_request.h"
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse#include "http_core.h"
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse#include "http_protocol.h"
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse#include "http_log.h"
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse#include "http_main.h"
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse#if 0
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse#include "scoreboard.h"
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse#endif
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse#include "apr_fnmatch.h"
05413593151a238718198cc04ca849b2426be106rse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrseHOOK_STRUCT(
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse        HOOK_LINK(translate_name)
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse        HOOK_LINK(check_user_id)
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse        HOOK_LINK(fixups)
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse        HOOK_LINK(type_checker)
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse        HOOK_LINK(access_checker)
434ad3e8e769a6a7a78c15f3ae2f7ae3adbfbb49wrowe        HOOK_LINK(auth_checker)
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse)
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrseIMPLEMENT_HOOK_RUN_FIRST(int,translate_name,(request_rec *r),(r),DECLINED)
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrseIMPLEMENT_HOOK_RUN_FIRST(int,check_user_id,(request_rec *r),(r),DECLINED)
05413593151a238718198cc04ca849b2426be106rseIMPLEMENT_HOOK_RUN_ALL(int,fixups,(request_rec *r),(r),OK,DECLINED)
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrseIMPLEMENT_HOOK_RUN_FIRST(int,type_checker,(request_rec *r),(r),DECLINED)
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrseIMPLEMENT_HOOK_RUN_ALL(int,access_checker,(request_rec *r),(r),OK,DECLINED)
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrseIMPLEMENT_HOOK_RUN_FIRST(int,auth_checker,(request_rec *r),(r),DECLINED)
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse/*****************************************************************
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse *
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse * Getting and checking directory configuration.  Also checks the
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse * FollowSymlinks and FollowSymOwner stuff, since this is really the
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse * only place that can happen (barring a new mid_dir_walk callout).
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse *
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse * We can't do it as an access_checker module function which gets
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse * called with the final per_dir_config, since we could have a directory
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse * with FollowSymLinks disabled, which contains a symlink to another
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse * with a .htaccess file which turns FollowSymLinks back on --- and
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse * access in such a case must be denied.  So, whatever it is that
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse * checks FollowSymLinks needs to know the state of the options as
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse * they change, all the way down.
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse */
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse/*
421d9002d73db52972bcca8f4497fe5d603b6b8eaaron * We don't want people able to serve up pipes, or unix sockets, or other
421d9002d73db52972bcca8f4497fe5d603b6b8eaaron * scary things.  Note that symlink tests are performed later.
421d9002d73db52972bcca8f4497fe5d603b6b8eaaron */
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrsestatic int check_safe_file(request_rec *r)
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse{
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    if (r->finfo.st_mode == 0         /* doesn't exist */
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse        || S_ISDIR(r->finfo.st_mode)
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse        || S_ISREG(r->finfo.st_mode)
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse        || S_ISLNK(r->finfo.st_mode)) {
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse        return OK;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    }
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 0, r,
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse                "object is not a file, directory or symlink: %s",
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse                r->filename);
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    return HTTP_FORBIDDEN;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse}
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrsestatic int check_symlinks(char *d, int opts)
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse{
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse#if defined(OS2) || defined(WIN32)
421d9002d73db52972bcca8f4497fe5d603b6b8eaaron    /* OS/2 doesn't have symlinks */
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    return OK;
421d9002d73db52972bcca8f4497fe5d603b6b8eaaron#else
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    struct stat lfi, fi;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    char *lastp;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    int res;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
87a1c79b7b37702a254920ca5214fb282a4fb085dougm    if (opts & OPT_SYM_LINKS)
87a1c79b7b37702a254920ca5214fb282a4fb085dougm        return OK;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse    /*
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse     * Strip trailing '/', if any, off what we're checking; trailing slashes
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse     * make some systems follow symlinks to directories even in lstat().
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse     * After we've done the lstat, put it back.  Also, don't bother checking
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse     * '/' at all...
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse     *
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse     * Note that we don't have to worry about multiple slashes here because of
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse     * no2slash() below...
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse     */
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse    lastp = d + strlen(d) - 1;
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse    if (lastp == d)
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse        return OK;              /* Root directory, '/' */
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse    if (*lastp == '/')
87a1c79b7b37702a254920ca5214fb282a4fb085dougm        *lastp = '\0';
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse    else
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse        lastp = NULL;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    res = lstat(d, &lfi);
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    if (lastp)
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse        *lastp = '/';
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    /*
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse     * Note that we don't reject accesses to nonexistent files (multiviews or
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse     * the like may cons up a way to run the transaction anyway)...
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse     */
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
87a1c79b7b37702a254920ca5214fb282a4fb085dougm    if (!(res >= 0) || !S_ISLNK(lfi.st_mode))
87a1c79b7b37702a254920ca5214fb282a4fb085dougm        return OK;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    /* OK, it's a symlink.  May still be OK with OPT_SYM_OWNER */
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse
87a1c79b7b37702a254920ca5214fb282a4fb085dougm    if (!(opts & OPT_SYM_OWNER))
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse        return HTTP_FORBIDDEN;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    if (stat(d, &fi) < 0)
87a1c79b7b37702a254920ca5214fb282a4fb085dougm        return HTTP_FORBIDDEN;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
87a1c79b7b37702a254920ca5214fb282a4fb085dougm    return (fi.st_uid == lfi.st_uid) ? OK : HTTP_FORBIDDEN;
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse#endif
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse}
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse/* Dealing with the file system to get PATH_INFO
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse */
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrsestatic int get_path_info(request_rec *r)
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse{
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    char *cp;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    char *path = r->filename;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    char *end = &path[strlen(path)];
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    char *last_cp = NULL;
03181bdde77be8e10ed297a02db5d8f98ecb703ewrowe    int rv;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse#ifdef HAVE_DRIVE_LETTERS
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse    char bStripSlash=1;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse#endif
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    if (r->finfo.st_mode) {
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse    /* assume path_info already set */
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse    return OK;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    }
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse#ifdef HAVE_DRIVE_LETTERS
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse    /* If the directory is x:\, then we don't want to strip
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse     * the trailing slash since x: is not a valid directory.
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse     */
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    if (strlen(path) == 3 && path[1] == ':' && path[2] == '/')
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse        bStripSlash = 0;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    /* If UNC name == //machine/share/, do not
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse     * advance over the trailing slash.  Any other
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse     * UNC name is OK to strip the slash.
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse     */
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    cp = end;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    if (strlen(path) > 2 && path[0] == '/' && path[1] == '/' &&
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse        path[2] != '/' && cp[-1] == '/') {
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse        char *p;
7f683bb300df767164724ebc664f339ac396b434dougm        int iCount=0;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse        p = path;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse        while (p = strchr(p,'/')) {
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse            p++;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse            iCount++;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse        }
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse        if (iCount == 4)
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse            bStripSlash = 0;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    }
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    if (bStripSlash)
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse#endif
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse        /* Advance over trailing slashes ... NOT part of filename
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse         * if file is not a UNC name (Win32 only).
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse         */
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse        for (cp = end; cp > path && cp[-1] == '/'; --cp)
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse            continue;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    while (cp > path) {
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse        /* See if the pathname ending here exists... */
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse        *cp = '\0';
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse         /* We must not stat() filenames that may cause os-specific system
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse          * problems, such as "/file/aux" on DOS-abused filesystems.
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse          * So pretend that they do not exist by returning an ENOENT error.
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse          * This will force us to drop that part of the path and keep
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse          * looking back for a "real" file that exists, while still allowing
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse          * the "invalid" path parts within the PATH_INFO.
421d9002d73db52972bcca8f4497fe5d603b6b8eaaron          */
421d9002d73db52972bcca8f4497fe5d603b6b8eaaron         if (!ap_os_is_filename_valid(path)) {
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse             errno = ENOENT;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse             rv = -1;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse         }
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse         else {
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse             errno = 0;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse             rv = stat(path, &r->finfo);
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse         }
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse        if (cp != end)
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse            *cp = '/';
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse        if (!rv) {
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse            /*
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse             * Aha!  Found something.  If it was a directory, we will search
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse             * contents of that directory for a multi_match, so the PATH_INFO
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse             * argument starts with the component after that.
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse             */
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse            if (S_ISDIR(r->finfo.st_mode) && last_cp) {
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse                r->finfo.st_mode = 0;   /* No such file... */
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse                cp = last_cp;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse            }
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse            r->path_info = ap_pstrdup(r->pool, cp);
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse            *cp = '\0';
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse            return OK;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse        }
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    /* must set this to zero, some stat()s may have corrupted it
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse     * even if they returned an error.
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse     */
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse    r->finfo.st_mode = 0;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse#if defined(ENOENT) && defined(ENOTDIR)
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse        if (errno == ENOENT || errno == ENOTDIR) {
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse            last_cp = cp;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse            while (--cp > path && *cp != '/')
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse                continue;
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse            while (cp > path && cp[-1] == '/')
421d9002d73db52972bcca8f4497fe5d603b6b8eaaron                --cp;
421d9002d73db52972bcca8f4497fe5d603b6b8eaaron        }
421d9002d73db52972bcca8f4497fe5d603b6b8eaaron        else {
184f5da95d14895f7f33c90b8b8f70653afb0d92wrowe#if defined(EACCES)
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse            if (errno != EACCES)
184f5da95d14895f7f33c90b8b8f70653afb0d92wrowe#endif
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse                ap_log_rerror(APLOG_MARK, APLOG_ERR, errno, r,
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse                            "access to %s failed", r->uri);
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse            return HTTP_FORBIDDEN;
bb0b94431dc9a1591a0a38a6c48925c6d9213c83rse        }
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse#else
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse#error ENOENT || ENOTDIR not defined; please see the
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse#error comments at this line in the source for a workaround.
cc003103e52ff9d5fe9bed567ef9438613ab4fbfrse        /*
a0e0d20b666cfc453ac76506079eb50e03997eefdougm         * If ENOENT || ENOTDIR is not defined in one of the your OS's
a0e0d20b666cfc453ac76506079eb50e03997eefdougm         * include files, Apache does not know how to check to see why the
a0e0d20b666cfc453ac76506079eb50e03997eefdougm         * stat() of the index file failed; there are cases where it can fail
a0e0d20b666cfc453ac76506079eb50e03997eefdougm         * even though the file exists.  This means that it is possible for
a0e0d20b666cfc453ac76506079eb50e03997eefdougm         * someone to get a directory listing of a directory even though
a0e0d20b666cfc453ac76506079eb50e03997eefdougm         * there is an index (eg. index.html) file in it.  If you do not have
a0e0d20b666cfc453ac76506079eb50e03997eefdougm         * a problem with this, delete the above #error lines and start the
a0e0d20b666cfc453ac76506079eb50e03997eefdougm         * compile again.  If you need to do this, please submit a bug report
a0e0d20b666cfc453ac76506079eb50e03997eefdougm         * from http://www.apache.org/bug_report.html letting us know that
a0e0d20b666cfc453ac76506079eb50e03997eefdougm         * you needed to do this.  Please be sure to include the operating
a0e0d20b666cfc453ac76506079eb50e03997eefdougm         * system you are using.
a0e0d20b666cfc453ac76506079eb50e03997eefdougm         */
a0e0d20b666cfc453ac76506079eb50e03997eefdougm    last_cp = cp;
a0e0d20b666cfc453ac76506079eb50e03997eefdougm
a0e0d20b666cfc453ac76506079eb50e03997eefdougm    while (--cp > path && *cp != '/')
a0e0d20b666cfc453ac76506079eb50e03997eefdougm        continue;
a0e0d20b666cfc453ac76506079eb50e03997eefdougm
a0e0d20b666cfc453ac76506079eb50e03997eefdougm    while (cp > path && cp[-1] == '/')
a0e0d20b666cfc453ac76506079eb50e03997eefdougm        --cp;
a0e0d20b666cfc453ac76506079eb50e03997eefdougm#endif  /* ENOENT && ENOTDIR */
a0e0d20b666cfc453ac76506079eb50e03997eefdougm    }
a0e0d20b666cfc453ac76506079eb50e03997eefdougm    return OK;
a0e0d20b666cfc453ac76506079eb50e03997eefdougm}
a0e0d20b666cfc453ac76506079eb50e03997eefdougm
a0e0d20b666cfc453ac76506079eb50e03997eefdougmstatic int directory_walk(request_rec *r)
a0e0d20b666cfc453ac76506079eb50e03997eefdougm{
a0e0d20b666cfc453ac76506079eb50e03997eefdougm    core_server_config *sconf = ap_get_module_config(r->server->module_config,
a0e0d20b666cfc453ac76506079eb50e03997eefdougm                                                  &core_module);
a0e0d20b666cfc453ac76506079eb50e03997eefdougm    void *per_dir_defaults = r->server->lookup_defaults;
a0e0d20b666cfc453ac76506079eb50e03997eefdougm    void **sec = (void **) sconf->sec->elts;
a0e0d20b666cfc453ac76506079eb50e03997eefdougm    int num_sec = sconf->sec->nelts;
a0e0d20b666cfc453ac76506079eb50e03997eefdougm    char *test_filename;
a0e0d20b666cfc453ac76506079eb50e03997eefdougm    char *test_dirname;
a0e0d20b666cfc453ac76506079eb50e03997eefdougm    int res;
a0e0d20b666cfc453ac76506079eb50e03997eefdougm    unsigned i, num_dirs, iStart;
a0e0d20b666cfc453ac76506079eb50e03997eefdougm    int j, test_filename_len;
a0e0d20b666cfc453ac76506079eb50e03997eefdougm
a0e0d20b666cfc453ac76506079eb50e03997eefdougm    /*
a0e0d20b666cfc453ac76506079eb50e03997eefdougm     * Are we dealing with a file? If not, we can (hopefuly) safely assume we
a0e0d20b666cfc453ac76506079eb50e03997eefdougm     * have a handler that doesn't require one, but for safety's sake, and so
a0e0d20b666cfc453ac76506079eb50e03997eefdougm     * we have something find_types() can get something out of, fake one. But
a0e0d20b666cfc453ac76506079eb50e03997eefdougm     * don't run through the directory entries.
a0e0d20b666cfc453ac76506079eb50e03997eefdougm     */
a0e0d20b666cfc453ac76506079eb50e03997eefdougm
a0e0d20b666cfc453ac76506079eb50e03997eefdougm    if (r->filename == NULL) {
a0e0d20b666cfc453ac76506079eb50e03997eefdougm        r->filename = ap_pstrdup(r->pool, r->uri);
a0e0d20b666cfc453ac76506079eb50e03997eefdougm        r->finfo.st_mode = 0;   /* Not really a file... */
a0e0d20b666cfc453ac76506079eb50e03997eefdougm        r->per_dir_config = per_dir_defaults;
a0e0d20b666cfc453ac76506079eb50e03997eefdougm
a0e0d20b666cfc453ac76506079eb50e03997eefdougm        return OK;
a0e0d20b666cfc453ac76506079eb50e03997eefdougm    }
a0e0d20b666cfc453ac76506079eb50e03997eefdougm
a0e0d20b666cfc453ac76506079eb50e03997eefdougm    /*
a0e0d20b666cfc453ac76506079eb50e03997eefdougm     * Go down the directory hierarchy.  Where we have to check for symlinks,
a0e0d20b666cfc453ac76506079eb50e03997eefdougm     * do so.  Where a .htaccess file has permission to override anything,
a0e0d20b666cfc453ac76506079eb50e03997eefdougm     * try to find one.  If either of these things fails, we could poke
a0e0d20b666cfc453ac76506079eb50e03997eefdougm     * around, see why, and adjust the lookup_rec accordingly --- this might
a0e0d20b666cfc453ac76506079eb50e03997eefdougm     * save us a call to get_path_info (with the attendant stat()s); however,
a0e0d20b666cfc453ac76506079eb50e03997eefdougm     * for the moment, that's not worth the trouble.
a0e0d20b666cfc453ac76506079eb50e03997eefdougm     *
a0e0d20b666cfc453ac76506079eb50e03997eefdougm     * Fake filenames (i.e. proxy:) only match Directory sections.
a0e0d20b666cfc453ac76506079eb50e03997eefdougm     */
a0e0d20b666cfc453ac76506079eb50e03997eefdougm
a0e0d20b666cfc453ac76506079eb50e03997eefdougm    if (!ap_os_is_path_absolute(r->filename))
a0e0d20b666cfc453ac76506079eb50e03997eefdougm    {
22357f10585a847ebf7b084cbe1db07ba071aeb6dougm        void *this_conf, *entry_config;
22357f10585a847ebf7b084cbe1db07ba071aeb6dougm        core_dir_config *entry_core;
dd7c683f683624b082d430935b594df7406782c2dougm        char *entry_dir;
22357f10585a847ebf7b084cbe1db07ba071aeb6dougm
22357f10585a847ebf7b084cbe1db07ba071aeb6dougm        for (j = 0; j < num_sec; ++j) {
22357f10585a847ebf7b084cbe1db07ba071aeb6dougm
22357f10585a847ebf7b084cbe1db07ba071aeb6dougm            entry_config = sec[j];
22357f10585a847ebf7b084cbe1db07ba071aeb6dougm
dd7c683f683624b082d430935b594df7406782c2dougm            entry_core = (core_dir_config *)
22357f10585a847ebf7b084cbe1db07ba071aeb6dougm                ap_get_module_config(entry_config, &core_module);
22357f10585a847ebf7b084cbe1db07ba071aeb6dougm            entry_dir = entry_core->d;
dd7c683f683624b082d430935b594df7406782c2dougm
dd7c683f683624b082d430935b594df7406782c2dougm            this_conf = NULL;
dd7c683f683624b082d430935b594df7406782c2dougm            if (entry_core->r) {
dd7c683f683624b082d430935b594df7406782c2dougm                if (!ap_regexec(entry_core->r, r->filename, 0, NULL, 0))
dd7c683f683624b082d430935b594df7406782c2dougm                    this_conf = entry_config;
dd7c683f683624b082d430935b594df7406782c2dougm            }
dd7c683f683624b082d430935b594df7406782c2dougm            else if (entry_core->d_is_fnmatch) {
dd7c683f683624b082d430935b594df7406782c2dougm                if (!ap_fnmatch(entry_dir, r->filename, 0))
dd7c683f683624b082d430935b594df7406782c2dougm                    this_conf = entry_config;
dd7c683f683624b082d430935b594df7406782c2dougm            }
6a26d195dfba3a91f8352cabd4547afa77675bb1aaron            else if (!strncmp(r->filename, entry_dir, strlen(entry_dir)))
d94fd18ee21dc9b8c1f422144a881e941687d41fdougm                this_conf = entry_config;
d94fd18ee21dc9b8c1f422144a881e941687d41fdougm
d94fd18ee21dc9b8c1f422144a881e941687d41fdougm            if (this_conf)
d94fd18ee21dc9b8c1f422144a881e941687d41fdougm                per_dir_defaults = ap_merge_per_dir_configs(r->pool,
e18e68b42830409bf48de0df9eed3fe363664aa7aaron                                                         per_dir_defaults,
3c65aa88903de7330a07e133dfda779842fadad4wrowe                                                         this_conf);
d94fd18ee21dc9b8c1f422144a881e941687d41fdougm        }
b40799adcfd0f0a2a465c2934585986f7bbc9bbcwrowe
b40799adcfd0f0a2a465c2934585986f7bbc9bbcwrowe        r->per_dir_config = per_dir_defaults;
b40799adcfd0f0a2a465c2934585986f7bbc9bbcwrowe
b40799adcfd0f0a2a465c2934585986f7bbc9bbcwrowe        return OK;
b40799adcfd0f0a2a465c2934585986f7bbc9bbcwrowe    }
b40799adcfd0f0a2a465c2934585986f7bbc9bbcwrowe
b40799adcfd0f0a2a465c2934585986f7bbc9bbcwrowe    r->filename   = ap_os_case_canonical_filename(r->pool, r->filename);
b40799adcfd0f0a2a465c2934585986f7bbc9bbcwrowe
b40799adcfd0f0a2a465c2934585986f7bbc9bbcwrowe    res = get_path_info(r);
d54a31567fc49f1841d27a14796ae726016c54aadougm    if (res != OK) {
3c65aa88903de7330a07e133dfda779842fadad4wrowe        return res;
b40799adcfd0f0a2a465c2934585986f7bbc9bbcwrowe    }
d94fd18ee21dc9b8c1f422144a881e941687d41fdougm
3c65aa88903de7330a07e133dfda779842fadad4wrowe    r->filename   = ap_os_canonical_filename(r->pool, r->filename);
3c65aa88903de7330a07e133dfda779842fadad4wrowe
3c65aa88903de7330a07e133dfda779842fadad4wrowe    test_filename = ap_pstrdup(r->pool, r->filename);
3c65aa88903de7330a07e133dfda779842fadad4wrowe
3c65aa88903de7330a07e133dfda779842fadad4wrowe    ap_no2slash(test_filename);
3c65aa88903de7330a07e133dfda779842fadad4wrowe    num_dirs = ap_count_dirs(test_filename);
3c65aa88903de7330a07e133dfda779842fadad4wrowe
b40799adcfd0f0a2a465c2934585986f7bbc9bbcwrowe    if (!ap_os_is_filename_valid(r->filename)) {
b40799adcfd0f0a2a465c2934585986f7bbc9bbcwrowe        ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 0, r,
b40799adcfd0f0a2a465c2934585986f7bbc9bbcwrowe                      "Filename is not valid: %s", r->filename);
b40799adcfd0f0a2a465c2934585986f7bbc9bbcwrowe        return HTTP_FORBIDDEN;
b40799adcfd0f0a2a465c2934585986f7bbc9bbcwrowe    }
b40799adcfd0f0a2a465c2934585986f7bbc9bbcwrowe
b40799adcfd0f0a2a465c2934585986f7bbc9bbcwrowe    if ((res = check_safe_file(r))) {
b40799adcfd0f0a2a465c2934585986f7bbc9bbcwrowe        return res;
d94fd18ee21dc9b8c1f422144a881e941687d41fdougm    }
d94fd18ee21dc9b8c1f422144a881e941687d41fdougm
d94fd18ee21dc9b8c1f422144a881e941687d41fdougm    test_filename_len = strlen(test_filename);
dd9940ba9b4d9c09f034b910d1569db4a5111c75dougm    if (test_filename[test_filename_len - 1] == '/')
e62985c7a1b46a5036a247f35bddac1308985758dougm        --num_dirs;
98f81eac9530d487f05013cda9df99755bb59689trawick
98f81eac9530d487f05013cda9df99755bb59689trawick    if (S_ISDIR(r->finfo.st_mode))
98f81eac9530d487f05013cda9df99755bb59689trawick        ++num_dirs;
98f81eac9530d487f05013cda9df99755bb59689trawick
98f81eac9530d487f05013cda9df99755bb59689trawick    /*
98f81eac9530d487f05013cda9df99755bb59689trawick     * We will use test_dirname as scratch space while we build directory
98f81eac9530d487f05013cda9df99755bb59689trawick     * names during the walk.  Profiling shows directory_walk to be a busy
98f81eac9530d487f05013cda9df99755bb59689trawick     * function so we try to avoid allocating lots of extra memory here.
98f81eac9530d487f05013cda9df99755bb59689trawick     * We need 2 extra bytes, one for trailing \0 and one because
98f81eac9530d487f05013cda9df99755bb59689trawick     * make_dirstr_prefix will add potentially one extra /.
98f81eac9530d487f05013cda9df99755bb59689trawick     */
98f81eac9530d487f05013cda9df99755bb59689trawick    test_dirname = ap_palloc(r->pool, test_filename_len + 2);
e62985c7a1b46a5036a247f35bddac1308985758dougm
98f81eac9530d487f05013cda9df99755bb59689trawick    iStart = 1;
e62985c7a1b46a5036a247f35bddac1308985758dougm#ifdef WIN32
e62985c7a1b46a5036a247f35bddac1308985758dougm    /* If the name is a UNC name, then do not walk through the
8464a9c46b967001e38fe3c8afff51a649e9de51dougm     * machine and share name (e.g. \\machine\share\)
d94fd18ee21dc9b8c1f422144a881e941687d41fdougm     */
d94fd18ee21dc9b8c1f422144a881e941687d41fdougm    if (num_dirs > 3 && test_filename[0] == '/' && test_filename[1] == '/')
8464a9c46b967001e38fe3c8afff51a649e9de51dougm        iStart = 4;
3c65aa88903de7330a07e133dfda779842fadad4wrowe#endif
3c65aa88903de7330a07e133dfda779842fadad4wrowe
d94fd18ee21dc9b8c1f422144a881e941687d41fdougm    /* j keeps track of which section we're on, see core_reorder_directories */
d94fd18ee21dc9b8c1f422144a881e941687d41fdougm    j = 0;
d94fd18ee21dc9b8c1f422144a881e941687d41fdougm    for (i = iStart; i <= num_dirs; ++i) {
3c65aa88903de7330a07e133dfda779842fadad4wrowe        int overrides_here;
d94fd18ee21dc9b8c1f422144a881e941687d41fdougm        core_dir_config *core_dir = (core_dir_config *)
3c65aa88903de7330a07e133dfda779842fadad4wrowe            ap_get_module_config(per_dir_defaults, &core_module);
8464a9c46b967001e38fe3c8afff51a649e9de51dougm
3c65aa88903de7330a07e133dfda779842fadad4wrowe        /*
3c65aa88903de7330a07e133dfda779842fadad4wrowe         * XXX: this could be made faster by only copying the next component
8464a9c46b967001e38fe3c8afff51a649e9de51dougm         * rather than copying the entire thing all over.
3c65aa88903de7330a07e133dfda779842fadad4wrowe         */
e18e68b42830409bf48de0df9eed3fe363664aa7aaron        ap_make_dirstr_prefix(test_dirname, test_filename, i);
d94fd18ee21dc9b8c1f422144a881e941687d41fdougm
d94fd18ee21dc9b8c1f422144a881e941687d41fdougm        /*
e62985c7a1b46a5036a247f35bddac1308985758dougm         * Do symlink checks first, because they are done with the
9e530d1e49062250c345bfd45810e145b4f435eddougm         * permissions appropriate to the *parent* directory...
e62985c7a1b46a5036a247f35bddac1308985758dougm         */
8464a9c46b967001e38fe3c8afff51a649e9de51dougm
3c65aa88903de7330a07e133dfda779842fadad4wrowe        if ((res = check_symlinks(test_dirname, core_dir->opts))) {
3c65aa88903de7330a07e133dfda779842fadad4wrowe            ap_log_rerror(APLOG_MARK, APLOG_NOERRNO|APLOG_ERR, 0, r,
d94fd18ee21dc9b8c1f422144a881e941687d41fdougm                        "Symbolic link not allowed: %s", test_dirname);
6a26d195dfba3a91f8352cabd4547afa77675bb1aaron            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 (!ap_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, 0, 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 (!ap_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 (!ap_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)
{
    ap_context_t *rrp;
    request_rec *rr;

    ap_create_context(&rrp, r->pool);
    rr = ap_pcalloc(rrp, sizeof(request_rec));
    rr->pool = rrp;
    return rr;
}

API_EXPORT(request_rec *) ap_sub_req_method_uri(const char *method,
                                                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);

    /* 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_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_run_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_run_access_checker(rnew))
               || (ap_some_auth_required(rnew)
                   && ((res = ap_run_check_user_id(rnew))
                       || (res = ap_run_auth_checker(rnew)))))
            : ((res = ap_run_access_checker(rnew))
               && (!ap_some_auth_required(rnew)
                   || ((res = ap_run_check_user_id(rnew))
                       || (res = ap_run_auth_checker(rnew)))))
           )
        || (res = ap_run_type_checker(rnew))
        || (res = ap_run_fixups(rnew))
       ) {
        rnew->status = res;
    }
    return rnew;
}

API_EXPORT(request_rec *) ap_sub_req_lookup_uri(const char *new_file,
                                                const request_rec *r)
{
    return ap_sub_req_method_uri("GET", new_file, r);
}

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, 0, 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_run_type_checker(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_run_access_checker(rnew))
               || (ap_some_auth_required(rnew)
                   && ((res = ap_run_check_user_id(rnew))
                       || (res = ap_run_auth_checker(rnew)))))
            : ((res = ap_run_access_checker(rnew))
               && (!ap_some_auth_required(rnew)
                   || ((res = ap_run_check_user_id(rnew))
                       || (res = ap_run_auth_checker(rnew)))))
           )
        || (res = ap_run_type_checker(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, 0, 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, 0, 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 ap_array_header_t *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_run_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_run_header_parser(r))) {
        ap_die(access_status, r);
        return;
    }

    switch (ap_satisfies(r)) {
    case SATISFY_ALL:
    case SATISFY_NOSPEC:
        if ((access_status = ap_run_access_checker(r)) != 0) {
            decl_die(access_status, "check access", r);
            return;
        }
        if (ap_some_auth_required(r)) {
            if (((access_status = ap_run_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_run_auth_checker(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_run_access_checker(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_run_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_run_auth_checker(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_run_type_checker(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)
{
    process_request_internal(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.
     */
    /* TODO: reimplement ap_bhalfduplex... not sure how yet */
    /* //ap_bhalfduplex(r->connection->client); */
    ap_run_log_transaction(r);
}

static ap_table_t *rename_original_env(ap_context_t *p, ap_table_t *t)
{
    ap_array_header_t *env_arr = ap_table_elts(t);
    ap_table_entry_t *elts = (ap_table_entry_t *) env_arr->elts;
    ap_table_t *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->expecting_100   = r->expecting_100;
    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(ap_time_t *) ap_update_mtime(request_rec *r, ap_time_t *dependency_mtime)
{
    if (ap_timecmp(r->mtime, dependency_mtime) == APR_LESS) {
        r->mtime = dependency_mtime;
    }
    return r->mtime;
}