+++ /dev/null
-const char parsers_rcs[] = "$Id: parsers.c,v 2.6 2003/10/02 19:41:23 david__schmidt Exp $";
-/*********************************************************************
- *
- * File : $Source: /cvsroot/ijbswa/current/src/parsers.c,v $
- *
- * Purpose : Declares functions to parse/crunch headers and pages.
- * Functions declared include:
- * `add_to_iob', `client_cookie_adder', `client_from',
- * `client_referrer', `client_send_cookie', `client_ua',
- * `client_uagent', `client_x_forwarded',
- * `client_x_forwarded_adder', `client_xtra_adder',
- * `content_type', `crumble', `destroy_list', `enlist',
- * `flush_socket', ``get_header', `sed',
- * and `server_set_cookie'.
- *
- * Copyright : Written by and Copyright (C) 2001 the SourceForge
- * Privoxy team. http://www.privoxy.org/
- *
- * Based on the Internet Junkbuster originally written
- * by and Copyright (C) 1997 Anonymous Coders and
- * Junkbusters Corporation. http://www.junkbusters.com
- *
- * This program is free software; you can redistribute it
- * and/or modify it under the terms of the GNU General
- * Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at
- * your option) any later version.
- *
- * This program is distributed in the hope that it will
- * be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A
- * PARTICULAR PURPOSE. See the GNU General Public
- * License for more details.
- *
- * The GNU General Public License should be included with
- * this file. If not, you can view it at
- * http://www.gnu.org/copyleft/gpl.html
- * or write to the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- *
- * Revisions :
- * $Log: parsers.c,v $
- * Revision 2.6 2003/10/02 19:41:23 david__schmidt
- * Updated header debug logging to show the header text that is
- * being crunched; refactored functions in parsers.c to have a
- * single, common exit point
- *
- * Revision 2.5 2003/09/25 01:44:33 david__schmidt
- * Resyncing HEAD with v_3_0_branch for two OSX fixes:
- * Making thread IDs look sane in the logfile for Mach kernels,
- * and fixing multithreading crashes due to thread-unsafe
- * system calls.
- * and
- *
- * Revision 2.4 2003/01/26 20:24:26 david__schmidt
- * Updated activity console instrumentation locations
- *
- * Revision 2.3 2002/12/28 03:58:19 david__schmidt
- * Initial drop of dashboard instrumentation - enabled with
- * --enable-activity-console
- *
- * Revision 2.2 2002/11/10 04:20:38 hal9
- * Fix typo: supressed -> suppressed
- *
- * Revision 2.1 2002/09/11 11:23:59 oes
- * Fixed logging of cookies: Killed incoming cookies now logged; incoming/outgoing cookies now distinguished in log
- *
- * Revision 2.0 2002/06/04 14:34:21 jongfoster
- * Moving source files to src/
- *
- * Revision 1.56 2002/05/12 15:34:22 jongfoster
- * Fixing typo in a comment
- *
- * Revision 1.55 2002/05/08 16:01:07 oes
- * Optimized add_to_iob:
- * - Use realloc instead of malloc(), memcpy(), free()
- * - Expand to powers of two if possible, to get
- * O(log n) reallocs instead of O(n).
- * - Moved check for buffer limit here from chat
- * - Report failure via returncode
- *
- * Revision 1.54 2002/04/02 15:03:16 oes
- * Tiny code cosmetics
- *
- * Revision 1.53 2002/03/26 22:29:55 swa
- * we have a new homepage!
- *
- * Revision 1.52 2002/03/24 13:25:43 swa
- * name change related issues
- *
- * Revision 1.51 2002/03/13 00:27:05 jongfoster
- * Killing warnings
- *
- * Revision 1.50 2002/03/12 01:45:35 oes
- * More verbose logging
- *
- * Revision 1.49 2002/03/09 20:03:52 jongfoster
- * - Making various functions return int rather than size_t.
- * (Undoing a recent change). Since size_t is unsigned on
- * Windows, functions like read_socket that return -1 on
- * error cannot return a size_t.
- *
- * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
- * crashes, and also frequently caused JB to jump to 100%
- * CPU and stay there. (Because it thought it had just
- * read ((unsigned)-1) == 4Gb of data...)
- *
- * - The signature of write_socket has changed, it now simply
- * returns success=0/failure=nonzero.
- *
- * - Trying to get rid of a few warnings --with-debug on
- * Windows, I've introduced a new type "jb_socket". This is
- * used for the socket file descriptors. On Windows, this
- * is SOCKET (a typedef for unsigned). Everywhere else, it's
- * an int. The error value can't be -1 any more, so it's
- * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
- * Windows it maps to the #define INVALID_SOCKET.)
- *
- * - The signature of bind_port has changed.
- *
- * Revision 1.48 2002/03/07 03:46:53 oes
- * Fixed compiler warnings etc
- *
- * Revision 1.47 2002/02/20 23:15:13 jongfoster
- * Parsing functions now handle out-of-memory gracefully by returning
- * an error code.
- *
- * Revision 1.46 2002/01/17 21:03:47 jongfoster
- * Moving all our URL and URL pattern parsing code to urlmatch.c.
- *
- * Revision 1.45 2002/01/09 14:33:03 oes
- * Added support for localtime_r.
- *
- * Revision 1.44 2001/12/14 01:22:54 steudten
- * Remove 'user:pass@' from 'proto://user:pass@host' for the
- * new added header 'Host: ..'. (See Req ID 491818)
- *
- * Revision 1.43 2001/11/23 00:26:38 jongfoster
- * Fixing two really stupid errors in my previous commit
- *
- * Revision 1.42 2001/11/22 21:59:30 jongfoster
- * Adding code to handle +no-cookies-keep
- *
- * Revision 1.41 2001/11/05 23:43:05 steudten
- * Add time+date to log files.
- *
- * Revision 1.40 2001/10/26 20:13:09 jongfoster
- * ctype.h is needed in Windows, too.
- *
- * Revision 1.39 2001/10/26 17:40:04 oes
- * Introduced get_header_value()
- * Removed http->user_agent, csp->referrer and csp->accept_types
- * Removed client_accept()
- *
- * Revision 1.38 2001/10/25 03:40:48 david__schmidt
- * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
- * threads to call select() simultaneously. So, it's time to do a real, live,
- * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
- * (native). Both versions will work, but using __OS2__ offers multi-threading.
- *
- * Revision 1.37 2001/10/23 21:36:02 jongfoster
- * Documenting sed()'s error behaviou (doc change only)
- *
- * Revision 1.36 2001/10/13 12:51:51 joergs
- * Removed client_host, (was only required for the old 2.0.2-11 http://noijb.
- * force-load), instead crumble Host: and add it (again) in client_host_adder
- * (in case we get a HTTP/1.0 request without Host: header and forward it to
- * a HTTP/1.1 server/proxy).
- *
- * Revision 1.35 2001/10/09 22:39:21 jongfoster
- * assert.h is also required under Win32, so moving out of #ifndef _WIN32
- * block.
- *
- * Revision 1.34 2001/10/07 18:50:55 oes
- * Added server_content_encoding, renamed server_transfer_encoding
- *
- * Revision 1.33 2001/10/07 18:04:49 oes
- * Changed server_http11 to server_http and its pattern to "HTTP".
- * Additional functionality: it now saves the HTTP status into
- * csp->http->status and sets CT_TABOO for Status 206 (partial range)
- *
- * Revision 1.32 2001/10/07 15:43:28 oes
- * Removed FEATURE_DENY_GZIP and replaced it with client_accept_encoding,
- * client_te and client_accept_encoding_adder, triggered by the new
- * +no-compression action. For HTTP/1.1 the Accept-Encoding header is
- * changed to allow only identity and chunked, and the TE header is
- * crunched. For HTTP/1.0, Accept-Encoding is crunched.
- *
- * parse_http_request no longer does anything than parsing. The rewriting
- * of http->cmd and version mangling are gone. It now also recognizes
- * the put and delete methods and saves the url in http->url. Removed
- * unused variable.
- *
- * renamed content_type and content_length to have the server_ prefix
- *
- * server_content_type now only works if csp->content_type != CT_TABOO
- *
- * added server_transfer_encoding, which
- * - Sets CT_TABOO to prohibit filtering if encoding compresses
- * - Raises the CSP_FLAG_CHUNKED flag if Encoding is "chunked"
- * - Change from "chunked" to "identity" if body was chunked
- * but has been de-chunked for filtering.
- *
- * added server_content_md5 which crunches any Content-MD5 headers
- * if the body was modified.
- *
- * made server_http11 conditional on +downgrade action
- *
- * Replaced 6 boolean members of csp with one bitmap (csp->flags)
- *
- * Revision 1.31 2001/10/05 14:25:02 oes
- * Crumble Keep-Alive from Server
- *
- * Revision 1.30 2001/09/29 12:56:03 joergs
- * IJB now changes HTTP/1.1 to HTTP/1.0 in requests and answers.
- *
- * Revision 1.29 2001/09/24 21:09:24 jongfoster
- * Fixing 2 memory leaks that Guy spotted, where the paramater to
- * enlist() was not being free()d.
- *
- * Revision 1.28 2001/09/22 16:32:28 jongfoster
- * Removing unused #includes.
- *
- * Revision 1.27 2001/09/20 15:45:25 steudten
- *
- * add casting from size_t to int for printf()
- * remove local variable shadow s2
- *
- * Revision 1.26 2001/09/16 17:05:14 jongfoster
- * Removing unused #include showarg.h
- *
- * Revision 1.25 2001/09/16 13:21:27 jongfoster
- * Changes to use new list functions.
- *
- * Revision 1.24 2001/09/13 23:05:50 jongfoster
- * Changing the string paramater to the header parsers a "const".
- *
- * Revision 1.23 2001/09/12 18:08:19 steudten
- *
- * In parse_http_request() header rewriting miss the host value, so
- * from http://www.mydomain.com the result was just " / " not
- * http://www.mydomain.com/ in case we forward.
- *
- * Revision 1.22 2001/09/10 10:58:53 oes
- * Silenced compiler warnings
- *
- * Revision 1.21 2001/07/31 14:46:00 oes
- * - Persistant connections now suppressed
- * - sed() no longer appends empty header to csp->headers
- *
- * Revision 1.20 2001/07/30 22:08:36 jongfoster
- * Tidying up #defines:
- * - All feature #defines are now of the form FEATURE_xxx
- * - Permanently turned off WIN_GUI_EDIT
- * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
- *
- * Revision 1.19 2001/07/25 17:21:54 oes
- * client_uagent now saves copy of User-Agent: header value
- *
- * Revision 1.18 2001/07/13 14:02:46 oes
- * - Included fix to repair broken HTTP requests that
- * don't contain a path, not even '/'.
- * - Removed all #ifdef PCRS
- * - content_type now always inspected and classified as
- * text, gif or other.
- * - formatting / comments
- *
- * Revision 1.17 2001/06/29 21:45:41 oes
- * Indentation, CRLF->LF, Tab-> Space
- *
- * Revision 1.16 2001/06/29 13:32:42 oes
- * - Fixed a comment
- * - Adapted free_http_request
- * - Removed logentry from cancelled commit
- *
- * Revision 1.15 2001/06/03 19:12:38 oes
- * deleted const struct interceptors
- *
- * Revision 1.14 2001/06/01 18:49:17 jongfoster
- * Replaced "list_share" with "list" - the tiny memory gain was not
- * worth the extra complexity.
- *
- * Revision 1.13 2001/05/31 21:30:33 jongfoster
- * Removed list code - it's now in list.[ch]
- * Renamed "permission" to "action", and changed many features
- * to use the actions file rather than the global config.
- *
- * Revision 1.12 2001/05/31 17:33:13 oes
- *
- * CRLF -> LF
- *
- * Revision 1.11 2001/05/29 20:11:19 joergs
- * '/ * inside comment' warning removed.
- *
- * Revision 1.10 2001/05/29 09:50:24 jongfoster
- * Unified blocklist/imagelist/permissionslist.
- * File format is still under discussion, but the internal changes
- * are (mostly) done.
- *
- * Also modified interceptor behaviour:
- * - We now intercept all URLs beginning with one of the following
- * prefixes (and *only* these prefixes):
- * * http://i.j.b/
- * * http://ijbswa.sf.net/config/
- * * http://ijbswa.sourceforge.net/config/
- * - New interceptors "home page" - go to http://i.j.b/ to see it.
- * - Internal changes so that intercepted and fast redirect pages
- * are not replaced with an image.
- * - Interceptors now have the option to send a binary page direct
- * to the client. (i.e. ijb-send-banner uses this)
- * - Implemented show-url-info interceptor. (Which is why I needed
- * the above interceptors changes - a typical URL is
- * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
- * The previous mechanism would not have intercepted that, and
- * if it had been intercepted then it then it would have replaced
- * it with an image.)
- *
- * Revision 1.9 2001/05/28 17:26:33 jongfoster
- * Fixing segfault if last header was crunched.
- * Fixing Windows build (snprintf() is _snprintf() under Win32, but we
- * can use the cross-platform sprintf() instead.)
- *
- * Revision 1.8 2001/05/27 22:17:04 oes
- *
- * - re_process_buffer no longer writes the modified buffer
- * to the client, which was very ugly. It now returns the
- * buffer, which it is then written by chat.
- *
- * - content_length now adjusts the Content-Length: header
- * for modified documents rather than crunch()ing it.
- * (Length info in csp->content_length, which is 0 for
- * unmodified documents)
- *
- * - For this to work, sed() is called twice when filtering.
- *
- * Revision 1.7 2001/05/27 13:19:06 oes
- * Patched Joergs solution for the content-length in.
- *
- * Revision 1.6 2001/05/26 13:39:32 jongfoster
- * Only crunches Content-Length header if applying RE filtering.
- * Without this fix, Microsoft Windows Update wouldn't work.
- *
- * Revision 1.5 2001/05/26 00:28:36 jongfoster
- * Automatic reloading of config file.
- * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
- * Most of the global variables have been moved to a new
- * struct configuration_spec, accessed through csp->config->globalname
- * Most of the globals remaining are used by the Win32 GUI.
- *
- * Revision 1.4 2001/05/22 18:46:04 oes
- *
- * - Enabled filtering banners by size rather than URL
- * by adding patterns that replace all standard banner
- * sizes with the "Junkbuster" gif to the re_filterfile
- *
- * - Enabled filtering WebBugs by providing a pattern
- * which kills all 1x1 images
- *
- * - Added support for PCRE_UNGREEDY behaviour to pcrs,
- * which is selected by the (nonstandard and therefore
- * capital) letter 'U' in the option string.
- * It causes the quantifiers to be ungreedy by default.
- * Appending a ? turns back to greedy (!).
- *
- * - Added a new interceptor ijb-send-banner, which
- * sends back the "Junkbuster" gif. Without imagelist or
- * MSIE detection support, or if tinygif = 1, or the
- * URL isn't recognized as an imageurl, a lame HTML
- * explanation is sent instead.
- *
- * - Added new feature, which permits blocking remote
- * script redirects and firing back a local redirect
- * to the browser.
- * The feature is conditionally compiled, i.e. it
- * can be disabled with --disable-fast-redirects,
- * plus it must be activated by a "fast-redirects"
- * line in the config file, has its own log level
- * and of course wants to be displayed by show-proxy-args
- * Note: Boy, all the #ifdefs in 1001 locations and
- * all the fumbling with configure.in and acconfig.h
- * were *way* more work than the feature itself :-(
- *
- * - Because a generic redirect template was needed for
- * this, tinygif = 3 now uses the same.
- *
- * - Moved GIFs, and other static HTTP response templates
- * to project.h
- *
- * - Some minor fixes
- *
- * - Removed some >400 CRs again (Jon, you really worked
- * a lot! ;-)
- *
- * Revision 1.3 2001/05/20 01:21:20 jongfoster
- * Version 2.9.4 checkin.
- * - Merged popupfile and cookiefile, and added control over PCRS
- * filtering, in new "permissionsfile".
- * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
- * file error you now get a message box (in the Win32 GUI) rather
- * than the program exiting with no explanation.
- * - Made killpopup use the PCRS MIME-type checking and HTTP-header
- * skipping.
- * - Removed tabs from "config"
- * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
- * - Bumped up version number.
- *
- * Revision 1.2 2001/05/17 23:02:36 oes
- * - Made referrer option accept 'L' as a substitute for 'ยง'
- *
- * Revision 1.1.1.1 2001/05/15 13:59:01 oes
- * Initial import of version 2.9.3 source tree
- *
- *
- *********************************************************************/
-\f
-
-#include "config.h"
-
-#ifndef _WIN32
-#include <stdio.h>
-#include <sys/types.h>
-#endif
-
-#include <stdlib.h>
-#include <ctype.h>
-#include <assert.h>
-#include <string.h>
-
-#if !defined(_WIN32) && !defined(__OS2__)
-#include <unistd.h>
-#endif
-
-#ifdef OSX_DARWIN
-#include <pthread.h>
-#include "jcc.h"
-/* jcc.h is for mutex semapores only */
-#endif /* def OSX_DARWIN */
-#include "project.h"
-#include "list.h"
-#include "parsers.h"
-#include "encode.h"
-#include "ssplit.h"
-#include "errlog.h"
-#include "jbsockets.h"
-#include "miscutil.h"
-#include "list.h"
-#ifdef FEATURE_ACTIVITY_CONSOLE
-#include "stats.h"
-#endif /* def FEATURE_ACTIVITY_CONSOLE */
-
-const char parsers_h_rcs[] = PARSERS_H_VERSION;
-
-/* Fix a problem with Solaris. There should be no effect on other
- * platforms.
- * Solaris's isspace() is a macro which uses it's argument directly
- * as an array index. Therefore we need to make sure that high-bit
- * characters generate +ve values, and ideally we also want to make
- * the argument match the declared parameter type of "int".
- *
- * Why did they write a character function that can't take a simple
- * "char" argument? Doh!
- */
-#define ijb_isupper(__X) isupper((int)(unsigned char)(__X))
-#define ijb_tolower(__X) tolower((int)(unsigned char)(__X))
-
-
-const struct parsers client_patterns[] = {
- { "referer:", 8, client_referrer },
- { "user-agent:", 11, client_uagent },
- { "ua-", 3, client_ua },
- { "from:", 5, client_from },
- { "cookie:", 7, client_send_cookie },
- { "x-forwarded-for:", 16, client_x_forwarded },
- { "Accept-Encoding:", 16, client_accept_encoding },
- { "TE:", 3, client_te },
- { "Host:", 5, crumble },
-/* { "if-modified-since:", 18, crumble }, */
- { "Keep-Alive:", 11, crumble },
- { "connection:", 11, crumble },
- { "proxy-connection:", 17, crumble },
- { NULL, 0, NULL }
-};
-
-
-const struct parsers server_patterns[] = {
- { "HTTP", 4, server_http },
- { "set-cookie:", 11, server_set_cookie },
- { "connection:", 11, crumble },
- { "Content-Type:", 13, server_content_type },
- { "Content-Length:", 15, server_content_length },
- { "Content-MD5:", 12, server_content_md5 },
- { "Content-Encoding:", 17, server_content_encoding },
- { "Transfer-Encoding:", 18, server_transfer_coding },
- { "Keep-Alive:", 11, crumble },
- { NULL, 0, NULL }
-};
-
-
-const add_header_func_ptr add_client_headers[] = {
- client_host_adder,
- client_cookie_adder,
- client_x_forwarded_adder,
- client_xtra_adder,
- client_accept_encoding_adder,
- connection_close_adder,
- NULL
-};
-
-
-const add_header_func_ptr add_server_headers[] = {
- connection_close_adder,
- NULL
-};
-
-
-/*********************************************************************
- *
- * Function : flush_socket
- *
- * Description : Write any pending "buffered" content.
- *
- * Parameters :
- * 1 : fd = file descriptor of the socket to read
- * 2 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : On success, the number of bytes written are returned (zero
- * indicates nothing was written). On error, -1 is returned,
- * and errno is set appropriately. If count is zero and the
- * file descriptor refers to a regular file, 0 will be
- * returned without causing any other effect. For a special
- * file, the results are not portable.
- *
- *********************************************************************/
-int flush_socket(jb_socket fd, struct client_state *csp)
-{
- struct iob *iob = csp->iob;
- int len = iob->eod - iob->cur;
-
- if (len <= 0)
- {
- return(0);
- }
-
- if (write_socket(fd, iob->cur, (size_t)len))
- {
- return(-1);
- }
- iob->eod = iob->cur = iob->buf;
- return(len);
-
-}
-
-
-/*********************************************************************
- *
- * Function : add_to_iob
- *
- * Description : Add content to the buffered page, expanding the
- * buffer if necessary.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- * 2 : buf = holds the content to be added to the page
- * 3 : n = number of bytes to be added
- *
- * Returns : JB_ERR_OK on success, JB_ERR_MEMORY if out-of-memory
- * or buffer limit reached.
- *
- *********************************************************************/
-jb_err add_to_iob(struct client_state *csp, char *buf, int n)
-{
- struct iob *iob = csp->iob;
- size_t used, offset, need, want;
- char *p;
-
- if (n <= 0) return JB_ERR_OK;
-
- used = iob->eod - iob->buf;
- offset = iob->cur - iob->buf;
- need = used + n + 1;
-
- /*
- * If the buffer can't hold the new data, extend it first.
- * Use the next power of two if possible, else use the actual need.
- */
- if (need > csp->config->buffer_limit)
- {
- log_error(LOG_LEVEL_ERROR, "Buffer limit reached while extending the buffer (iob)");
- return JB_ERR_MEMORY;
- }
-
- if (need > iob->size)
- {
- for (want = csp->iob->size ? csp->iob->size : 512; want <= need;) want *= 2;
-
- if (want <= csp->config->buffer_limit && NULL != (p = (char *)realloc(iob->buf, want)))
- {
- iob->size = want;
- }
- else if (NULL != (p = (char *)realloc(iob->buf, need)))
- {
- iob->size = need;
- }
- else
- {
- log_error(LOG_LEVEL_ERROR, "Extending the buffer (iob) failed: %E");
- return JB_ERR_MEMORY;
- }
-
- /* Update the iob pointers */
- iob->cur = p + offset;
- iob->eod = p + used;
- iob->buf = p;
- }
-
- /* copy the new data into the iob buffer */
- memcpy(iob->eod, buf, (size_t)n);
-
- /* point to the end of the data */
- iob->eod += n;
-
- /* null terminate == cheap insurance */
- *iob->eod = '\0';
-
- return JB_ERR_OK;
-
-}
-
-
-/*********************************************************************
- *
- * Function : get_header
- *
- * Description : This (odd) routine will parse the csp->iob
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : Any one of the following:
- *
- * 1) a pointer to a dynamically allocated string that contains a header line
- * 2) NULL indicating that the end of the header was reached
- * 3) "" indicating that the end of the iob was reached before finding
- * a complete header line.
- *
- *********************************************************************/
-char *get_header(struct client_state *csp)
-{
- struct iob *iob;
- char *p, *q, *ret;
- iob = csp->iob;
-
- if ((iob->cur == NULL)
- || ((p = strchr(iob->cur, '\n')) == NULL))
- {
- return(""); /* couldn't find a complete header */
- }
-
- *p = '\0';
-
- ret = strdup(iob->cur);
- if (ret == NULL)
- {
- /* FIXME No way to handle error properly */
- log_error(LOG_LEVEL_FATAL, "Out of memory in get_header()");
- }
-
- iob->cur = p+1;
-
- if ((q = strchr(ret, '\r')) != NULL) *q = '\0';
-
- /* is this a blank line (i.e. the end of the header) ? */
- if (*ret == '\0')
- {
- freez(ret);
- return(NULL);
- }
-
- return(ret);
-
-}
-
-
-/*********************************************************************
- *
- * Function : get_header_value
- *
- * Description : Get the value of a given header from a chained list
- * of header lines or return NULL if no such header is
- * present in the list.
- *
- * Parameters :
- * 1 : header_list = pointer to list
- * 2 : header_name = string with name of header to look for.
- * Trailing colon required, capitalization
- * doesn't matter.
- *
- * Returns : NULL if not found, else value of header
- *
- *********************************************************************/
-char *get_header_value(const struct list *header_list, const char *header_name)
-{
- struct list_entry *cur_entry;
- char *ret = NULL;
- size_t length = 0;
-
- assert(header_list);
- assert(header_name);
- length = strlen(header_name);
-
- for (cur_entry = header_list->first; cur_entry ; cur_entry = cur_entry->next)
- {
- if (cur_entry->str)
- {
- if (!strncmpic(cur_entry->str, header_name, length))
- {
- /*
- * Found: return pointer to start of value
- */
- ret = (char *) (cur_entry->str + length);
- while (*ret && ijb_isspace(*ret)) ret++;
- return(ret);
- }
- }
- }
-
- /*
- * Not found
- */
- return NULL;
-
-}
-
-/*********************************************************************
- *
- * Function : sed
- *
- * Description : add, delete or modify lines in the HTTP header streams.
- * On entry, it receives a linked list of headers space
- * that was allocated dynamically (both the list nodes
- * and the header contents).
- *
- * As a side effect it frees the space used by the original
- * header lines.
- *
- * Parameters :
- * 1 : pats = list of patterns to match against headers
- * 2 : more_headers = list of functions to add more
- * headers (client or server)
- * 3 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : Single pointer to a fully formed header, or NULL
- * on out-of-memory error.
- *
- *********************************************************************/
-char *sed(const struct parsers pats[],
- const add_header_func_ptr more_headers[],
- struct client_state *csp)
-{
- struct list_entry *p;
- const struct parsers *v;
- const add_header_func_ptr *f;
- jb_err err = JB_ERR_OK;
-
- for (v = pats; (err == JB_ERR_OK) && (v->str != NULL) ; v++)
- {
- for (p = csp->headers->first; (err == JB_ERR_OK) && (p != NULL) ; p = p->next)
- {
- /* Header crunch()ed in previous run? -> ignore */
- if (p->str == NULL) continue;
-
- if (v == pats) log_error(LOG_LEVEL_HEADER, "scan: %s", p->str);
-
- if (strncmpic(p->str, v->str, v->len) == 0)
- {
- err = v->parser(csp, (char **)&(p->str));
- }
- }
- }
-
- /* place any additional headers on the csp->headers list */
- for (f = more_headers; (err == JB_ERR_OK) && (*f) ; f++)
- {
- err = (*f)(csp);
- }
-
- if (err != JB_ERR_OK)
- {
- return NULL;
- }
-
- return list_to_text(csp->headers);
-}
-
-
-/* here begins the family of parser functions that reformat header lines */
-
-
-/*********************************************************************
- *
- * Function : crumble
- *
- * Description : This is called if a header matches a pattern to "crunch"
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- * 2 : header = On input, pointer to header to modify.
- * On output, pointer to the modified header, or NULL
- * to remove the header. This function frees the
- * original string if necessary.
- *
- * Returns : JB_ERR_OK on success, or
- * JB_ERR_MEMORY on out-of-memory error.
- *
- *********************************************************************/
-jb_err crumble(struct client_state *csp, char **header)
-{
- log_error(LOG_LEVEL_HEADER, "crunch: %s",*header);
- freez(*header);
- return JB_ERR_OK;
-}
-
-
-/*********************************************************************
- *
- * Function : server_content_type
- *
- * Description : Set the content-type for filterable types (text/.*,
- * javascript and image/gif) unless filtering has been
- * forbidden (CT_TABOO) while parsing earlier headers.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- * 2 : header = On input, pointer to header to modify.
- * On output, pointer to the modified header, or NULL
- * to remove the header. This function frees the
- * original string if necessary.
- *
- * Returns : JB_ERR_OK on success, or
- * JB_ERR_MEMORY on out-of-memory error.
- *
- *********************************************************************/
-jb_err server_content_type(struct client_state *csp, char **header)
-{
- if (csp->content_type != CT_TABOO)
- {
- if (strstr(*header, " text/")
- || strstr(*header, "application/x-javascript"))
- csp->content_type = CT_TEXT;
- else if (strstr(*header, " image/gif"))
- csp->content_type = CT_GIF;
- else if (strstr(*header, " image/jpeg"))
- csp->content_type = CT_JPEG;
- else
- csp->content_type = 0;
- }
-
- return JB_ERR_OK;
-}
-
-
-/*********************************************************************
- *
- * Function : server_transfer_coding
- *
- * Description : - Prohibit filtering (CT_TABOO) if transfer coding compresses
- * - Raise the CSP_FLAG_CHUNKED flag if coding is "chunked"
- * - Change from "chunked" to "identity" if body was chunked
- * but has been de-chunked for filtering.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- * 2 : header = On input, pointer to header to modify.
- * On output, pointer to the modified header, or NULL
- * to remove the header. This function frees the
- * original string if necessary.
- *
- * Returns : JB_ERR_OK on success, or
- * JB_ERR_MEMORY on out-of-memory error.
- *
- *********************************************************************/
-jb_err server_transfer_coding(struct client_state *csp, char **header)
-{
- /*
- * Turn off pcrs and gif filtering if body compressed
- */
- if (strstr(*header, "gzip") || strstr(*header, "compress") || strstr(*header, "deflate"))
- {
- csp->content_type = CT_TABOO;
- }
-
- /*
- * Raise flag if body chunked
- */
- if (strstr(*header, "chunked"))
- {
- csp->flags |= CSP_FLAG_CHUNKED;
-
- /*
- * If the body was modified, it has been
- * de-chunked first, so adjust the header:
- */
- if (csp->flags & CSP_FLAG_MODIFIED)
- {
- freez(*header);
- *header = strdup("Transfer-Encoding: identity");
- return (header == NULL) ? JB_ERR_MEMORY : JB_ERR_OK;
- }
- }
-
- return JB_ERR_OK;
-}
-
-
-/*********************************************************************
- *
- * Function : server_content_encoding
- *
- * Description : Prohibit filtering (CT_TABOO) if content encoding compresses
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- * 2 : header = On input, pointer to header to modify.
- * On output, pointer to the modified header, or NULL
- * to remove the header. This function frees the
- * original string if necessary.
- *
- * Returns : JB_ERR_OK on success, or
- * JB_ERR_MEMORY on out-of-memory error.
- *
- *********************************************************************/
-jb_err server_content_encoding(struct client_state *csp, char **header)
-{
- /*
- * Turn off pcrs and gif filtering if body compressed
- */
- if (strstr(*header, "gzip") || strstr(*header, "compress") || strstr(*header, "deflate"))
- {
- csp->content_type = CT_TABOO;
- }
-
- return JB_ERR_OK;
-
-}
-
-
-/*********************************************************************
- *
- * Function : server_content_length
- *
- * Description : Adjust Content-Length header if we modified
- * the body.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- * 2 : header = On input, pointer to header to modify.
- * On output, pointer to the modified header, or NULL
- * to remove the header. This function frees the
- * original string if necessary.
- *
- * Returns : JB_ERR_OK on success, or
- * JB_ERR_MEMORY on out-of-memory error.
- *
- *********************************************************************/
-jb_err server_content_length(struct client_state *csp, char **header)
-{
- if (csp->content_length != 0) /* Content length has been modified */
- {
- freez(*header);
- *header = (char *) zalloc(100);
- if (*header == NULL)
- {
- return JB_ERR_MEMORY;
- }
-
- sprintf(*header, "Content-Length: %d", (int) csp->content_length);
-
- log_error(LOG_LEVEL_HEADER, "Adjust Content-Length to %d", (int) csp->content_length);
- }
-
- return JB_ERR_OK;
-}
-
-
-/*********************************************************************
- *
- * Function : server_content_md5
- *
- * Description : Crumble any Content-MD5 headers if the document was
- * modified. FIXME: Should we re-compute instead?
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- * 2 : header = On input, pointer to header to modify.
- * On output, pointer to the modified header, or NULL
- * to remove the header. This function frees the
- * original string if necessary.
- *
- * Returns : JB_ERR_OK on success, or
- * JB_ERR_MEMORY on out-of-memory error.
- *
- *********************************************************************/
-jb_err server_content_md5(struct client_state *csp, char **header)
-{
- if (csp->flags & CSP_FLAG_MODIFIED)
- {
- log_error(LOG_LEVEL_HEADER, "Crunching Content-MD5: %s", *header);
- freez(*header);
- }
-
- return JB_ERR_OK;
-}
-
-
-/*********************************************************************
- *
- * Function : client_accept_encoding
- *
- * Description : Rewrite the client's Accept-Encoding header so that
- * if doesn't allow compression, if the action applies.
- * Note: For HTTP/1.0 the absence of the header is enough.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- * 2 : header = On input, pointer to header to modify.
- * On output, pointer to the modified header, or NULL
- * to remove the header. This function frees the
- * original string if necessary.
- *
- * Returns : JB_ERR_OK on success, or
- * JB_ERR_MEMORY on out-of-memory error.
- *
- *********************************************************************/
-jb_err client_accept_encoding(struct client_state *csp, char **header)
-{
- if ((csp->action->flags & ACTION_NO_COMPRESSION) != 0)
- {
- log_error(LOG_LEVEL_HEADER, "Suppressed offer to compress content");
-
- freez(*header);
- if (!strcmpic(csp->http->ver, "HTTP/1.1"))
- {
- *header = strdup("Accept-Encoding: identity;q=1.0, *;q=0");
- if (*header == NULL)
- {
- return JB_ERR_MEMORY;
- }
- }
- }
-
- return JB_ERR_OK;
-}
-
-
-/*********************************************************************
- *
- * Function : client_te
- *
- * Description : Rewrite the client's TE header so that
- * if doesn't allow compression, if the action applies.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- * 2 : header = On input, pointer to header to modify.
- * On output, pointer to the modified header, or NULL
- * to remove the header. This function frees the
- * original string if necessary.
- *
- * Returns : JB_ERR_OK on success, or
- * JB_ERR_MEMORY on out-of-memory error.
- *
- *********************************************************************/
-jb_err client_te(struct client_state *csp, char **header)
-{
- if ((csp->action->flags & ACTION_NO_COMPRESSION) != 0)
- {
- freez(*header);
- log_error(LOG_LEVEL_HEADER, "Suppressed offer to compress transfer");
- }
-
- return JB_ERR_OK;
-}
-
-/*********************************************************************
- *
- * Function : client_referrer
- *
- * Description : Handle the "referer" config setting properly.
- * Called from `sed'.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- * 2 : header = On input, pointer to header to modify.
- * On output, pointer to the modified header, or NULL
- * to remove the header. This function frees the
- * original string if necessary.
- *
- * Returns : JB_ERR_OK on success, or
- * JB_ERR_MEMORY on out-of-memory error.
- *
- *********************************************************************/
-jb_err client_referrer(struct client_state *csp, char **header)
-{
- const char *newval;
- jb_err err = JB_ERR_OK;
-
-#ifdef FEATURE_FORCE_LOAD
- /* Since the referrer can include the prefix even
- * even if the request itself is non-forced, we must
- * clean it unconditionally
- */
- strclean(*header, FORCE_PREFIX);
-#endif /* def FEATURE_FORCE_LOAD */
-
- /*
- * As long as we're not blocking the referer...
- */
- if ((csp->action->flags & ACTION_HIDE_REFERER) != 0)
- {
-
- newval = csp->action->string[ACTION_STRING_REFERER];
-
-#ifdef FEATURE_ACTIVITY_CONSOLE
- /* We are doing something with the referer. */
- accumulate_stats(STATS_REFERER, 1);
-#endif /* def FEATURE_ACTIVITY_CONSOLE */
-
- /*
- * Note that each clause needs to freez the header pointer;
- * but everybody needs to use it for logging purposes before
- * it gets freed, so always free it just after logging it.
- */
- if ((newval == NULL) || (0 == strcmpic(newval, "block")) )
- {
- /*
- * Blocking referer
- */
- log_error(LOG_LEVEL_HEADER, "crunch: %s", *header);
- freez(*header);
- err = JB_ERR_OK;
- }
- else if (0 == strncmpic(newval, "http://", 7))
- {
- /*
- * We have a specific (fixed) referer we want to send.
- */
- log_error(LOG_LEVEL_HEADER, "modified: %s", *header);
- freez(*header);
- *header = strdup("Referer: ");
- if (NULL == *header)
- err = JB_ERR_MEMORY;
- else
- err = string_append(header, newval);
- }
- else
- {
- /*
- * Forge a referer as http://[hostname:port of REQUEST]/
- * to fool stupid checks for in-site links
- */
- if (0 != strcmpic(newval, "forge"))
- {
- /*
- * Invalid choice - but forge is probably the best default.
- */
- log_error(LOG_LEVEL_ERROR, "Bad parameter: +referer{%s}", newval);
- }
-
- log_error(LOG_LEVEL_HEADER, "crunch+forge: %s", *header);
- freez(*header);
- *header = strdup("Referer: http://");
- if (NULL == *header)
- err = JB_ERR_MEMORY;
- else
- {
- err = string_append(header, csp->http->hostport);
- err = string_append(header, "/");
- if (JB_ERR_OK == err)
- log_error(LOG_LEVEL_HEADER, "crunch+forged to: %s", *header);
- }
- }
- }
- return err;
-}
-
-
-/*********************************************************************
- *
- * Function : client_uagent
- *
- * Description : Handle the "user-agent" config setting properly
- * and remember its original value to enable browser
- * bug workarounds. Called from `sed'.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- * 2 : header = On input, pointer to header to modify.
- * On output, pointer to the modified header, or NULL
- * to remove the header. This function frees the
- * original string if necessary.
- *
- * Returns : JB_ERR_OK on success, or
- * JB_ERR_MEMORY on out-of-memory error.
- *
- *********************************************************************/
-jb_err client_uagent(struct client_state *csp, char **header)
-{
- const char *newval;
- jb_err err = JB_ERR_OK;
-
- /*
- * As long as we don't want to hide user-agent...
- */
- if ((csp->action->flags & ACTION_HIDE_USER_AGENT) != 0)
- {
- newval = csp->action->string[ACTION_STRING_USER_AGENT];
- if (NULL != newval)
- {
- log_error(LOG_LEVEL_HEADER, "modified: %s", *header);
-
- freez(*header);
- *header = strdup("User-Agent: ");
- err = string_append(header, newval);
- }
- }
-
- return err;
-}
-
-
-/*********************************************************************
- *
- * Function : client_ua
- *
- * Description : Handle "ua-" headers properly. Called from `sed'.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- * 2 : header = On input, pointer to header to modify.
- * On output, pointer to the modified header, or NULL
- * to remove the header. This function frees the
- * original string if necessary.
- *
- * Returns : JB_ERR_OK on success, or
- * JB_ERR_MEMORY on out-of-memory error.
- *
- *********************************************************************/
-jb_err client_ua(struct client_state *csp, char **header)
-{
- if ((csp->action->flags & ACTION_HIDE_USER_AGENT) != 0)
- {
-#ifdef FEATURE_ACTIVITY_CONSOLE
- accumulate_stats(STATS_CLIENT_UA, 1);
-#endif /* def FEATURE_ACTIVITY_CONSOLE */
- log_error(LOG_LEVEL_HEADER, "crunch: %s", *header);
- freez(*header);
- }
-
- return JB_ERR_OK;
-}
-
-
-/*********************************************************************
- *
- * Function : client_from
- *
- * Description : Handle the "from" config setting properly.
- * Called from `sed'.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- * 2 : header = On input, pointer to header to modify.
- * On output, pointer to the modified header, or NULL
- * to remove the header. This function frees the
- * original string if necessary.
- *
- * Returns : JB_ERR_OK on success, or
- * JB_ERR_MEMORY on out-of-memory error.
- *
- *********************************************************************/
-jb_err client_from(struct client_state *csp, char **header)
-{
- const char *newval;
- jb_err err = JB_ERR_OK;
-
- /*
- * As long as we should handle the "from" setting...
- */
- if ((csp->action->flags & ACTION_HIDE_FROM) != 0)
- {
-#ifdef FEATURE_ACTIVITY_CONSOLE
- /* We're doing something with it. */
- accumulate_stats(STATS_CLIENT_FROM, 1);
-#endif /* def FEATURE_ACTIVITY_CONSOLE */
-
- newval = csp->action->string[ACTION_STRING_FROM];
-
- /*
- * Are we blocking the e-mail address?
- */
- if ((NULL == newval) || (0 == strcmpic(newval, "block")) )
- {
- log_error(LOG_LEVEL_HEADER, "crunch: %s", *header);
- err = JB_ERR_OK;
- }
- else
- {
- log_error(LOG_LEVEL_HEADER, "modified: %s", *header);
- freez(*header);
- *header = strdup("From: ");
- err = string_append(header, newval);
- }
- }
- return err;
-}
-
-
-/*********************************************************************
- *
- * Function : client_send_cookie
- *
- * Description : Handle the "cookie" header properly. Called from `sed'.
- * If cookie is accepted, add it to the cookie_list,
- * else we crunch it. Mmmmmmmmmmm ... cookie ......
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- * 2 : header = On input, pointer to header to modify.
- * On output, pointer to the modified header, or NULL
- * to remove the header. This function frees the
- * original string if necessary.
- *
- * Returns : JB_ERR_OK on success, or
- * JB_ERR_MEMORY on out-of-memory error.
- *
- *********************************************************************/
-jb_err client_send_cookie(struct client_state *csp, char **header)
-{
- jb_err err = JB_ERR_OK;
-
- if ((csp->action->flags & ACTION_NO_COOKIE_READ) == 0)
- {
- /* strlen("cookie: ") == 8 */
- err = enlist(csp->cookie_list, *header + 8);
- }
- else
- {
- log_error(LOG_LEVEL_HEADER, "Crunched cookie: %s", *header);
- }
-
- /*
- * Always remove the cookie here. The cookie header
- * will be sent at the end of the header.
- */
- freez(*header);
-
- return err;
-}
-
-
-/*********************************************************************
- *
- * Function : client_x_forwarded
- *
- * Description : Handle the "x-forwarded-for" config setting properly,
- * also used in the add_client_headers list. Called from `sed'.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- * 2 : header = On input, pointer to header to modify.
- * On output, pointer to the modified header, or NULL
- * to remove the header. This function frees the
- * original string if necessary.
- *
- * Returns : JB_ERR_OK on success, or
- * JB_ERR_MEMORY on out-of-memory error.
- *
- *********************************************************************/
-jb_err client_x_forwarded(struct client_state *csp, char **header)
-{
- if ((csp->action->flags & ACTION_HIDE_FORWARDED) == 0)
- {
- /* Save it so we can re-add it later */
- freez(csp->x_forwarded);
- csp->x_forwarded = *header;
-
- /*
- * Always set *header = NULL, since this information
- * will be sent at the end of the header.
- */
- *header = NULL;
- }
- else
- {
-#ifdef FEATURE_ACTIVITY_CONSOLE
- accumulate_stats(STATS_CLIENT_X_FORWARDED, 1);
-#endif /* def FEATURE_ACTIVITY_CONSOLE */
- log_error(LOG_LEVEL_HEADER, "crunch: %s", *header);
- freez(*header);
- }
-
- return JB_ERR_OK;
-}
-
-/* the following functions add headers directly to the header list */
-
-/*********************************************************************
- *
- * Function : client_host_adder
- *
- * Description : (re)adds the host header. Called from `sed'.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : JB_ERR_OK on success, or
- * JB_ERR_MEMORY on out-of-memory error.
- *
- *********************************************************************/
-jb_err client_host_adder(struct client_state *csp)
-{
- char *p;
- char *pos;
- jb_err err = JB_ERR_OK;
-
- if ( csp->http->hostport && *(csp->http->hostport))
- {
- p = strdup("Host: ");
- if (NULL != p)
- {
- /*
- * remove 'user:pass@' from 'proto://user:pass@host'
- */
- if ( (pos = strchr( csp->http->hostport, '@')) != NULL )
- {
- string_append(&p, pos+1);
- }
- else
- {
- string_append(&p, csp->http->hostport);
- }
-
- log_error(LOG_LEVEL_HEADER, "addh: %s", p);
-
- err = enlist(csp->headers, p);
-
- freez(p);
- }
- else
- {
- err = JB_ERR_MEMORY;
- }
- }
- return err;
-}
-
-
-/*********************************************************************
- *
- * Function : client_cookie_adder
- *
- * Description : Used in the add_client_headers list. Called from `sed'.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : JB_ERR_OK on success, or
- * JB_ERR_MEMORY on out-of-memory error.
- *
- *********************************************************************/
-jb_err client_cookie_adder(struct client_state *csp)
-{
- struct list_entry *lst;
- char *tmp;
- struct list_entry *list1 = csp->cookie_list->first;
- struct list_entry *list2 = csp->action->multi[ACTION_MULTI_WAFER]->first;
- int first_cookie = 1;
- jb_err err = JB_ERR_OK;
-
- if ((list1 != NULL) || (list2 != NULL))
- {
- tmp = strdup("Cookie: ");
- if (NULL != tmp)
- {
- for (lst = list1; lst ; lst = lst->next)
- {
- if (first_cookie)
- {
- first_cookie = 0;
- }
- else
- {
- string_append(&tmp, "; ");
- }
- string_append(&tmp, lst->str);
- }
-
- for (lst = list2; lst ; lst = lst->next)
- {
- if (first_cookie)
- {
- first_cookie = 0;
- }
- else
- {
- string_append(&tmp, "; ");
- }
- string_join(&tmp, cookie_encode(lst->str));
- }
- log_error(LOG_LEVEL_HEADER, "addh: %s", tmp);
- err = enlist(csp->headers, tmp);
- free(tmp);
- }
- else
- {
- err = JB_ERR_MEMORY;
- }
- }
- return err;
-}
-
-
-/*********************************************************************
- *
- * Function : client_accept_encoding_adder
- *
- * Description : Add an Accept-Encoding header to the client's request
- * that disables compression if the action applies, and
- * the header is not already there. Called from `sed'.
- * Note: For HTTP/1.0, the absence of the header is enough.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : JB_ERR_OK on success, or
- * JB_ERR_MEMORY on out-of-memory error.
- *
- *********************************************************************/
-jb_err client_accept_encoding_adder(struct client_state *csp)
-{
- if ( ((csp->action->flags & ACTION_NO_COMPRESSION) != 0)
- && (!strcmpic(csp->http->ver, "HTTP/1.1")) )
- {
- return enlist_unique(csp->headers, "Accept-Encoding: identity;q=1.0, *;q=0", 16);
- }
-
- return JB_ERR_OK;
-}
-
-
-/*********************************************************************
- *
- * Function : client_xtra_adder
- *
- * Description : Used in the add_client_headers list. Called from `sed'.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : JB_ERR_OK on success, or
- * JB_ERR_MEMORY on out-of-memory error.
- *
- *********************************************************************/
-jb_err client_xtra_adder(struct client_state *csp)
-{
- struct list_entry *lst;
- jb_err err;
-
- for (lst = csp->action->multi[ACTION_MULTI_ADD_HEADER]->first;
- lst ; lst = lst->next)
- {
- log_error(LOG_LEVEL_HEADER, "addh: %s", lst->str);
- err = enlist(csp->headers, lst->str);
- if (err)
- {
- return err;
- }
-
- }
-
- return JB_ERR_OK;
-}
-
-
-/*********************************************************************
- *
- * Function : client_x_forwarded_adder
- *
- * Description : Used in the add_client_headers list. Called from `sed'.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : JB_ERR_OK on success, or
- * JB_ERR_MEMORY on out-of-memory error.
- *
- *********************************************************************/
-jb_err client_x_forwarded_adder(struct client_state *csp)
-{
- char *p = NULL;
- jb_err err = JB_ERR_OK;
-
- if (0 == (csp->action->flags & ACTION_HIDE_FORWARDED))
- {
-
- if (csp->x_forwarded)
- {
- p = strdup(csp->x_forwarded);
- err = string_append(&p, ", ");
- }
- else
- {
- p = strdup("X-Forwarded-For: ");
- }
- err = string_append(&p, csp->ip_addr_str);
-
- if (NULL != p)
- {
- log_error(LOG_LEVEL_HEADER, "addh: %s", p);
- err = enlist(csp->headers, p);
- freez(p);
- }
- }
- return err;
-}
-
-
-/*********************************************************************
- *
- * Function : connection_close_adder
- *
- * Description : Adds a "Connection: close" header to csp->headers
- * as a temporary fix for the needed but missing HTTP/1.1
- * support. Called from `sed'.
- * FIXME: This whole function shouldn't be neccessary!
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- *
- * Returns : JB_ERR_OK on success, or
- * JB_ERR_MEMORY on out-of-memory error.
- *
- *********************************************************************/
-jb_err connection_close_adder(struct client_state *csp)
-{
- return enlist(csp->headers, "Connection: close");
-}
-
-
-/*********************************************************************
- *
- * Function : server_http
- *
- * Description : - Save the HTTP Status into csp->http->status
- * - Set CT_TABOO to prevent filtering if the answer
- * is a partial range (HTTP status 206)
- * - Rewrite HTTP/1.1 answers to HTTP/1.0 if +downgrade
- * action applies.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- * 2 : header = On input, pointer to header to modify.
- * On output, pointer to the modified header, or NULL
- * to remove the header. This function frees the
- * original string if necessary.
- *
- * Returns : JB_ERR_OK on success, or
- * JB_ERR_MEMORY on out-of-memory error.
- *
- *********************************************************************/
-jb_err server_http(struct client_state *csp, char **header)
-{
- sscanf(*header, "HTTP/%*d.%*d %d", &(csp->http->status));
- if (csp->http->status == 206)
- {
- csp->content_type = CT_TABOO;
- }
-
- if ((csp->action->flags & ACTION_DOWNGRADE) != 0)
- {
- (*header)[7] = '0';
- log_error(LOG_LEVEL_HEADER, "Downgraded answer to HTTP/1.0");
- }
-
- return JB_ERR_OK;
-}
-
-
-/*********************************************************************
- *
- * Function : server_set_cookie
- *
- * Description : Handle the server "cookie" header properly.
- * Log cookie to the jar file. Then "crunch" it,
- * or accept it. Called from `sed'.
- *
- * Parameters :
- * 1 : csp = Current client state (buffers, headers, etc...)
- * 2 : header = On input, pointer to header to modify.
- * On output, pointer to the modified header, or NULL
- * to remove the header. This function frees the
- * original string if necessary.
- *
- * Returns : JB_ERR_OK on success, or
- * JB_ERR_MEMORY on out-of-memory error.
- *
- *********************************************************************/
-jb_err server_set_cookie(struct client_state *csp, char **header)
-{
- jb_err err = JB_ERR_OK;
-
-#ifdef FEATURE_COOKIE_JAR
- if (csp->config->jar)
- {
- /*
- * Write timestamp into outbuf.
- *
- * Complex because not all OSs have tm_gmtoff or
- * the %z field in strftime()
- */
- char tempbuf[ BUFFER_SIZE ];
- time_t now;
- struct tm tm_now;
- time (&now);
-#ifdef HAVE_LOCALTIME_R
- tm_now = *localtime_r(&now, &tm_now);
-#elif OSX_DARWIN
- pthread_mutex_lock(&localtime_mutex);
- tm_now = *localtime (&now);
- pthread_mutex_unlock(&localtime_mutex);
-#else
- tm_now = *localtime (&now);
-#endif
- strftime(tempbuf, BUFFER_SIZE-6, "%b %d %H:%M:%S ", &tm_now);
-
- /* strlen("set-cookie: ") = 12 */
- fprintf(csp->config->jar, "%s %s\t%s\n", tempbuf, csp->http->host, *header + 12);
- }
-#endif /* def FEATURE_COOKIE_JAR */
-
- if ((csp->action->flags & ACTION_NO_COOKIE_SET) != 0)
- {
- log_error(LOG_LEVEL_HEADER, "Crunched incoming cookie -- yum!");
-#ifdef FEATURE_ACTIVITY_CONSOLE
- accumulate_stats(STATS_COOKIE, 1);
-#endif /* def FEATURE_ACTIVITY_CONSOLE */
- err = crumble(csp, header);
- }
- else if ((csp->action->flags & ACTION_NO_COOKIE_KEEP) != 0)
- {
- /* Flag whether or not to log a message */
- int changed = 0;
-
- /* A variable to store the tag we're working on */
- char *cur_tag;
-
- /* Skip "Set-Cookie:" (11 characters) in header */
- cur_tag = *header + 11;
-
- /* skip whitespace between "Set-Cookie:" and value */
- while (*cur_tag && ijb_isspace(*cur_tag))
- {
- cur_tag++;
- }
-
- /* Loop through each tag in the cookie */
- while (*cur_tag)
- {
- /* Find next tag */
- char *next_tag = strchr(cur_tag, ';');
- if (next_tag != NULL)
- {
- /* Skip the ';' character itself */
- next_tag++;
-
- /* skip whitespace ";" and start of tag */
- while (*next_tag && ijb_isspace(*next_tag))
- {
- next_tag++;
- }
- }
- else
- {
- /* "Next tag" is the end of the string */
- next_tag = cur_tag + strlen(cur_tag);
- }
-
- /* Is this the "Expires" tag? */
- if (strncmpic(cur_tag, "expires=", 8) == 0)
- {
- /* Delete the tag by copying the rest of the string over it.
- * (Note that we cannot just use "strcpy(cur_tag, next_tag)",
- * since the behaviour of strcpy is undefined for overlapping
- * strings.)
- */
- memmove(cur_tag, next_tag, strlen(next_tag) + 1);
-
- /* That changed the header, need to issue a log message */
- changed = 1;
-
- /* Note that the next tag has now been moved to *cur_tag,
- * so we do not need to update the cur_tag pointer.
- */
- }
- else
- {
- /* Move on to next cookie tag */
- cur_tag = next_tag;
- }
- }
-
- if (changed)
- {
- log_error(LOG_LEVEL_HEADER, "Changed cookie to a temporary one.");
- }
- }
-
- return err;
-}
-
-
-#ifdef FEATURE_FORCE_LOAD
-/*********************************************************************
- *
- * Function : strclean
- *
- * Description : In-Situ-Eliminate all occurances of substring in
- * string
- *
- * Parameters :
- * 1 : string = string to clean
- * 2 : substring = substring to eliminate
- *
- * Returns : Number of eliminations
- *
- *********************************************************************/
-int strclean(const char *string, const char *substring)
-{
- int hits = 0, len = strlen(substring);
- char *pos, *p;
-
- while((pos = strstr(string, substring)) != NULL)
- {
- p = pos + len;
- do
- {
- *(p - len) = *p;
- }
- while (*p++ != '\0');
-
- hits++;
- }
-
- return(hits);
-}
-#endif /* def FEATURE_FORCE_LOAD */
-
-
-/*
- Local Variables:
- tab-width: 3
- end:
-*/
projects / privoxy.git / blobdiff