-const char filters_rcs[] = "$Id: filters.c,v 1.114 2009/04/17 11:27:49 fabiankeil Exp $";
+const char filters_rcs[] = "$Id: filters.c,v 1.124 2009/08/19 15:24:30 fabiankeil Exp $";
/*********************************************************************
*
* File : $Source: /cvsroot/ijbswa/current/filters.c,v $
* `execute_single_pcrs_command', `rewrite_url',
* `get_last_url'
*
- * Copyright : Written by and Copyright (C) 2001, 2004-2008 the SourceForge
+ * Copyright : Written by and Copyright (C) 2001, 2004-2009 the
* Privoxy team. http://www.privoxy.org/
*
* Based on the Internet Junkbuster originally written
* or write to the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
- * Revisions :
- * $Log: filters.c,v $
- * Revision 1.114 2009/04/17 11:27:49 fabiankeil
- * Petr Pisar's privoxy-3.0.12-ipv6-3.diff.
- *
- * Revision 1.113 2009/03/08 14:19:23 fabiankeil
- * Fix justified (but harmless) compiler warnings
- * on platforms where sizeof(int) < sizeof(long).
- *
- * Revision 1.112 2009/03/01 18:28:23 fabiankeil
- * Help clang understand that we aren't dereferencing
- * NULL pointers here.
- *
- * Revision 1.111 2008/12/04 18:13:46 fabiankeil
- * Fix a cparser warning.
- *
- * Revision 1.110 2008/11/10 16:40:25 fabiankeil
- * Fix a gcc44 warning.
- *
- * Revision 1.109 2008/11/08 15:48:41 fabiankeil
- * Mention actual values when complaining about
- * the chunk size exceeding the buffer size.
- *
- * Revision 1.108 2008/05/21 15:35:08 fabiankeil
- * - Mark csp as immutable for block_acl().
- * - Remove an obsolete complaint about filter_popups().
- *
- * Revision 1.107 2008/05/04 17:52:56 fabiankeil
- * Adjust parse_http_url() call to new prototype.
- *
- * Revision 1.106 2008/05/03 16:40:44 fabiankeil
- * Change content_filters_enabled()'s parameter from
- * csp->action to action so it can be also used in the
- * CGI code. Don't bother checking if there are filters
- * loaded, as that's somewhat besides the point.
- *
- * Revision 1.105 2008/03/28 15:13:39 fabiankeil
- * Remove inspect-jpegs action.
- *
- * Revision 1.104 2008/03/27 18:27:24 fabiankeil
- * Remove kill-popups action.
- *
- * Revision 1.103 2008/03/06 16:33:45 fabiankeil
- * If limit-connect isn't used, don't limit CONNECT requests to port 443.
- *
- * Revision 1.102 2008/03/01 14:00:44 fabiankeil
- * Let the block action take the reason for the block
- * as argument and show it on the "blocked" page.
- *
- * Revision 1.101 2008/02/23 16:57:12 fabiankeil
- * Rename url_actions() to get_url_actions() and let it
- * use the standard parameter ordering.
- *
- * Revision 1.100 2008/02/23 16:33:43 fabiankeil
- * Let forward_url() use the standard parameter ordering
- * and mark its second parameter immutable.
- *
- * Revision 1.99 2008/02/03 13:57:58 fabiankeil
- * Add SOCKS5 support for forward-override{}.
- *
- * Revision 1.98 2008/01/04 17:43:45 fabiankeil
- * Improve the warning messages that get logged if the action files
- * "enable" filters but no filters of that type have been loaded.
- *
- * Revision 1.97 2007/11/30 15:37:03 fabiankeil
- * Use freez instead of free.
- *
- * Revision 1.96 2007/10/19 16:53:28 fabiankeil
- * Add helper function to check if any content filters are enabled.
- *
- * Revision 1.95 2007/10/17 19:31:20 fabiankeil
- * Omitting the zero chunk that ends the chunk transfer encoding seems
- * to be the new black. Log the problem and continue filtering anyway.
- *
- * Revision 1.94 2007/09/29 13:20:20 fabiankeil
- * Remove two redundant and one useless log messages.
- *
- * Revision 1.93 2007/09/29 10:21:16 fabiankeil
- * - Move get_filter_function() from jcc.c to filters.c
- * so the filter functions can be static.
- * - Don't bother filtering body-less responses.
- *
- * Revision 1.92 2007/09/28 16:38:55 fabiankeil
- * - Execute content filters through execute_content_filter().
- * - Add prepare_for_filtering() so filter functions don't have to
- * care about de-chunking and decompression. As a side effect this enables
- * decompression for gif_deanimate_response() and jpeg_inspect_response().
- * - Change remove_chunked_transfer_coding()'s return type to jb_err.
- * Some clowns feel like chunking empty responses in which case
- * (size == 0) is valid but previously would be interpreted as error.
- *
- * Revision 1.91 2007/09/02 15:31:20 fabiankeil
- * Move match_portlist() from filter.c to urlmatch.c.
- * It's used for url matching, not for filtering.
- *
- * Revision 1.90 2007/09/02 12:44:17 fabiankeil
- * Remove newline at the end of a log_error() message.
- *
- * Revision 1.89 2007/08/05 13:42:23 fabiankeil
- * #1763173 from Stefan Huehner: declare some more functions static.
- *
- * Revision 1.88 2007/06/01 16:41:11 fabiankeil
- * Add forward-override{} to change the forwarding settings through
- * action sections. This is mainly interesting to forward different
- * clients differently (for example based on User-Agent or request
- * origin).
- *
- * Revision 1.87 2007/04/30 15:53:10 fabiankeil
- * Make sure filters with dynamic jobs actually use them.
- *
- * Revision 1.86 2007/04/30 15:03:28 fabiankeil
- * - Introduce dynamic pcrs jobs that can resolve variables.
- * - Don't run redirect functions more than once,
- * unless they are activated more than once.
- *
- * Revision 1.85 2007/03/21 12:24:47 fabiankeil
- * - Log the content size after decompression in decompress_iob()
- * instead of pcrs_filter_response().
- *
- * Revision 1.84 2007/03/20 15:16:34 fabiankeil
- * Use dedicated header filter actions instead of abusing "filter".
- * Replace "filter-client-headers" and "filter-client-headers"
- * with "server-header-filter" and "client-header-filter".
- *
- * Revision 1.83 2007/03/17 15:20:05 fabiankeil
- * New config option: enforce-blocks.
- *
- * Revision 1.82 2007/03/13 11:28:43 fabiankeil
- * - Fix port handling in acl_addr() and use a temporary acl spec
- * copy so error messages don't contain a truncated version.
- * - Log size of iob before and after decompression.
- *
- * Revision 1.81 2007/03/05 14:40:53 fabiankeil
- * - Cosmetical changes for LOG_LEVEL_RE_FILTER messages.
- * - Hide the "Go there anyway" link for blocked CONNECT
- * requests where going there anyway doesn't work anyway.
- *
- * Revision 1.80 2007/02/07 10:55:20 fabiankeil
- * - Save the reason for generating http_responses.
- * - Block (+block) with status code 403 instead of 404.
- * - Use a different kludge to remember a failed decompression.
- *
- * Revision 1.79 2007/01/31 16:21:38 fabiankeil
- * Search for Max-Forwards headers case-insensitive,
- * don't generate the "501 unsupported" message for invalid
- * Max-Forwards values and don't increase negative ones.
- *
- * Revision 1.78 2007/01/28 13:41:18 fabiankeil
- * - Add HEAD support to finish_http_response.
- * - Add error favicon to internal HTML error messages.
- *
- * Revision 1.77 2007/01/12 15:36:44 fabiankeil
- * Mark *csp as immutable for is_untrusted_url()
- * and is_imageurl(). Closes FR 1237736.
- *
- * Revision 1.76 2007/01/01 19:36:37 fabiankeil
- * Integrate a modified version of Wil Mahan's
- * zlib patch (PR #895531).
- *
- * Revision 1.75 2006/12/29 18:30:46 fabiankeil
- * Fixed gcc43 conversion warnings,
- * changed sprintf calls to snprintf.
- *
- * Revision 1.74 2006/12/24 17:37:38 fabiankeil
- * Adjust comment in pcrs_filter_response()
- * to recent pcrs changes. Hohoho.
- *
- * Revision 1.73 2006/12/23 16:01:02 fabiankeil
- * Don't crash if pcre returns an error code
- * that pcrs didn't expect. Fixes BR 1621173.
- *
- * Revision 1.72 2006/12/22 18:52:53 fabiankeil
- * Modified is_untrusted_url to complain in case of
- * write errors and to give a reason when adding new
- * entries to the trustfile. Closes FR 1097611.
- *
- * Revision 1.71 2006/12/22 14:24:52 fabiankeil
- * Skip empty filter files in pcrs_filter_response,
- * but don't ignore the ones that come afterwards.
- * Fixes parts of BR 1619208.
- *
- * Revision 1.70 2006/12/09 13:33:15 fabiankeil
- * Added some sanity checks for get_last_url().
- * Fixed possible segfault caused by my last commit.
- *
- * Revision 1.69 2006/12/08 12:39:13 fabiankeil
- * Let get_last_url() catch https URLs as well.
- *
- * Revision 1.68 2006/12/05 14:45:48 fabiankeil
- * Make sure get_last_url() behaves like advertised
- * and fast-redirects{} can be combined with redirect{}.
- *
- * Revision 1.67 2006/11/28 15:19:43 fabiankeil
- * Implemented +redirect{s@foo@bar@} to generate
- * a redirect based on a rewritten version of the
- * original URL.
- *
- * Revision 1.66 2006/09/23 13:26:38 roro
- * Replace TABs by spaces in source code.
- *
- * Revision 1.65 2006/09/21 12:54:43 fabiankeil
- * Fix +redirect{}. Didn't work with -fast-redirects.
- *
- * Revision 1.64 2006/08/31 10:55:49 fabiankeil
- * Block requests for untrusted URLs with status
- * code 403 instead of 200.
- *
- * Revision 1.63 2006/08/31 10:11:28 fabiankeil
- * Don't free p which is still in use and will be later
- * freed by free_map(). Don't claim the referrer is unknown
- * when the client didn't set one.
- *
- * Revision 1.62 2006/08/14 00:27:47 david__schmidt
- * Feature request 595948: Re-Filter logging in single line
- *
- * Revision 1.61 2006/08/03 02:46:41 david__schmidt
- * Incorporate Fabian Keil's patch work:\rhttp://www.fabiankeil.de/sourcecode/privoxy/
- *
- * Revision 1.60 2006/07/18 14:48:46 david__schmidt
- * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
- * with what was really the latest development (the v_3_0_branch branch)
- *
- * Revision 1.58.2.9 2006/01/29 23:10:56 david__schmidt
- * Multiple filter file support
- *
- * Revision 1.58.2.8 2005/05/07 21:50:55 david__schmidt
- * A few memory leaks plugged (mostly on error paths)
- *
- * Revision 1.58.2.7 2004/10/03 12:53:32 david__schmidt
- * Add the ability to check jpeg images for invalid
- * lengths of comment blocks. Defensive strategy
- * against the exploit:
- * Microsoft Security Bulletin MS04-028
- * Buffer Overrun in JPEG Processing (GDI+) Could
- * Allow Code Execution (833987)
- * Enabled with +inspect-jpegs in actions files.
- *
- * Revision 1.58.2.6 2003/12/06 22:18:27 gliptak
- * Correcting compile problem with FEATURE_IMAGE_BLOCKING
- *
- * Revision 1.58.2.5 2003/11/11 13:10:31 oes
- * Fixed bug #839859: "See why" link URL now gets url-encoded.
- *
- * Revision 1.58.2.4 2003/02/28 12:52:45 oes
- * Fixed a typo
- *
- * Revision 1.58.2.3 2002/09/25 14:51:51 oes
- * Added basic support for OPTIONS and TRACE HTTP methods:
- * New function direct_response which handles OPTIONS and
- * TRACE requests whose Max-Forwards header field is zero.
- *
- * Revision 1.58.2.2 2002/08/01 17:18:28 oes
- * Fixed BR 537651 / SR 579724 (MSIE image detect improper for IE/Mac)
- *
- * Revision 1.58.2.1 2002/07/26 15:18:53 oes
- * - Bugfix: Executing a filters without jobs no longer results in
- * turing off *all* filters.
- * - Security fix: Malicious web servers can't cause a seg fault
- * through bogus chunk sizes anymore
- *
- * Revision 1.58 2002/04/24 02:11:17 oes
- * Jon's multiple AF patch: url_actions now evaluates rules
- * from all AFs.
- *
- * Revision 1.57 2002/04/08 20:38:34 swa
- * fixed JB spelling
- *
- * Revision 1.56 2002/04/05 15:51:24 oes
- * - bugfix: error-pages now get correct request protocol
- * - fix for invalid HTML in trust info
- *
- * Revision 1.55 2002/04/02 16:13:51 oes
- * Fix: No "Go there anyway" for SSL
- *
- * Revision 1.54 2002/04/02 14:55:56 oes
- * Bugfix: is_untrusted_url() now depends on FEATURE_TRUST, not FEATURE_COOKIE_JAR
- *
- * Revision 1.53 2002/03/26 22:29:54 swa
- * we have a new homepage!
- *
- * Revision 1.52 2002/03/24 16:35:57 jongfoster
- * Removing logo
- *
- * Revision 1.51 2002/03/24 15:23:33 jongfoster
- * Name changes
- *
- * Revision 1.50 2002/03/24 13:25:43 swa
- * name change related issues
- *
- * Revision 1.49 2002/03/16 20:29:14 oes
- * Cosmetics
- *
- * Revision 1.48 2002/03/13 20:25:34 oes
- * Better logging for content filters
- *
- * Revision 1.47 2002/03/13 00:30:52 jongfoster
- * Killing warnings
- * Added option of always sending redirect for imageblock,
- * currently disabled with #if 0.
- *
- * Revision 1.46 2002/03/12 01:42:49 oes
- * Introduced modular filters
- *
- * Revision 1.45 2002/03/08 16:47:50 oes
- * Added choice beween GIF and PNG built-in images
- *
- * Revision 1.44 2002/03/07 03:49:31 oes
- * - Fixed compiler warnings etc
- * - Changed built-in images from GIF to PNG
- * (with regard to Unisys patent issue)
- * - Added a 4x4 pattern PNG which is less intrusive
- * than the logo but also clearly marks the deleted banners
- *
- * Revision 1.43 2002/01/22 23:51:59 jongfoster
- * Replacing strsav() with the safer string_append().
- *
- * Adding missing html_encode() to error message generators. Where encoded
- * and unencoded versions of a string were provided, removing the unencoded
- * one.
- *
- * Revision 1.42 2002/01/17 21:00:32 jongfoster
- * Moving all our URL and URL pattern parsing code to urlmatch.c.
- *
- * Using a single, simple url_match(pattern,url) function - rather than
- * the 3-line match routine which was repeated all over the place.
- *
- * Renaming free_url to free_url_spec, since it frees a struct url_spec.
- *
- * Using parse_http_url() to parse URLs without faking a HTTP
- * request line for parse_http_request().
- *
- * Revision 1.41 2001/11/13 00:14:07 jongfoster
- * Fixing stupid bug now I've figured out what || means.
- * (It always returns 0 or 1, not one of it's paramaters.)
- *
- * Revision 1.40 2001/10/26 17:37:55 oes
- * - Re-enabled Netscape 200/404 bug workaround in block_url():
- * - Removed OS/2 special case
- * - Made block_url() independant from sed() having been run
- * - Made trust_url independant from sed() having been run
- * - Made is_imageurl independant from sed() having been run.
- * It now checks User-Agent: and Accept: by itself.
- *
- *
- * Revision 1.39 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 1.38 2001/10/23 21:32:33 jongfoster
- * Adding error-checking to selected functions
- *
- * Revision 1.37 2001/10/22 15:33:56 david__schmidt
- * Special-cased OS/2 out of the Netscape-abort-on-404-in-js problem in
- * filters.c. Added a FIXME in front of the offending code. I'll gladly
- * put in a better/more robust fix for all parties if one is presented...
- * It seems that just returning 200 instead of 404 would pretty much fix
- * it for everyone, but I don't know all the history of the problem.
- *
- * Revision 1.36 2001/10/10 16:44:16 oes
- * Added match_portlist function
- *
- * Revision 1.35 2001/10/07 15:41:23 oes
- * Replaced 6 boolean members of csp with one bitmap (csp->flags)
- *
- * New function remove_chunked_transfer_coding that strips chunked
- * transfer coding to plain and is called by pcrs_filter_response
- * and gif_deanimate_response if neccessary
- *
- * Improved handling of zero-change re_filter runs
- *
- * pcrs_filter_response and gif_deanimate_response now remove
- * chunked transfer codeing before processing the body.
- *
- * Revision 1.34 2001/09/20 15:49:36 steudten
- *
- * Fix BUG: Change int size to size_t size in pcrs_filter_response().
- * See cgi.c fill_template().
- *
- * Revision 1.33 2001/09/16 17:05:14 jongfoster
- * Removing unused #include showarg.h
- *
- * Revision 1.32 2001/09/16 13:21:27 jongfoster
- * Changes to use new list functions.
- *
- * Revision 1.31 2001/09/16 11:38:02 jongfoster
- * Splitting fill_template() into 2 functions:
- * template_load() loads the file
- * template_fill() performs the PCRS regexps.
- * This is because the CGI edit interface has a "table row"
- * template which is used many times in the page - this
- * change means it's only loaded from disk once.
- *
- * Revision 1.30 2001/09/16 11:00:10 jongfoster
- * New function alloc_http_response, for symmetry with free_http_response
- *
- * Revision 1.29 2001/09/13 23:32:40 jongfoster
- * Moving image data to cgi.c rather than cgi.h
- * Fixing a GPF under Win32 (and any other OS that protects global
- * constants from being written to).
- *
- * Revision 1.28 2001/09/10 10:18:51 oes
- * Silenced compiler warnings
- *
- * Revision 1.27 2001/08/05 16:06:20 jongfoster
- * Modifiying "struct map" so that there are now separate header and
- * "map_entry" structures. This means that functions which modify a
- * map no longer need to return a pointer to the modified map.
- * Also, it no longer reverses the order of the entries (which may be
- * important with some advanced template substitutions).
- *
- * Revision 1.26 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 1.25 2001/07/26 10:09:46 oes
- * Made browser detection a little less naive
- *
- * Revision 1.24 2001/07/25 17:22:51 oes
- * Added workaround for Netscape bug that prevents display of page when loading a component fails.
- *
- * Revision 1.23 2001/07/23 13:40:12 oes
- * Fixed bug that caused document body to be dropped when pcrs joblist was empty.
- *
- * Revision 1.22 2001/07/18 12:29:34 oes
- * - Made gif_deanimate_response respect
- * csp->action->string[ACTION_STRING_DEANIMATE]
- * - Logging cosmetics
- *
- * Revision 1.21 2001/07/13 13:59:53 oes
- * - Introduced gif_deanimate_response which shares the
- * generic content modification interface of pcrs_filter_response
- * and acts as a wrapper to deanimate.c:gif_deanimate()
- * - Renamed re_process_buffer to pcrs_filter_response
- * - pcrs_filter_response now returns NULL on failiure
- * - Removed all #ifdef PCRS
- *
- * Revision 1.20 2001/07/01 17:01:04 oes
- * Added comments and missing return statement in is_untrusted_url()
- *
- * Revision 1.19 2001/06/29 21:45:41 oes
- * Indentation, CRLF->LF, Tab-> Space
- *
- * Revision 1.18 2001/06/29 13:27:38 oes
- * - Cleaned up, renamed and reorderd functions
- * and improved comments
- *
- * - block_url:
- * - Ported to CGI platform. Now delivers
- * http_response or NULL
- * - Unified HTML and GIF generation (moved image detection
- * and GIF generation here from jcc.c:chat())
- * - Fixed HTTP status to:
- * - 403 (Forbidden) for the "blocked" HTML message
- * - 200 (OK) for GIF answers
- * - 302 (Redirect) for redirect to GIF
- *
- * - trust_url:
- * - Ported to CGI platform. Now delivers
- * http_response or NULL
- * - Separated detection of untrusted URL into
- * (bool)is_untrusted_url
- * - Added enforcement of untrusted requests
- *
- * - Moved redirect_url() from cgi.c to here
- * and ported it to the CGI platform
- *
- * - Removed logentry from cancelled commit
- *
- * Revision 1.17 2001/06/09 10:55:28 jongfoster
- * Changing BUFSIZ ==> BUFFER_SIZE
- *
- * Revision 1.16 2001/06/07 23:10:26 jongfoster
- * Allowing unanchored domain patterns to back off and retry
- * if they partially match. Optimized right-anchored patterns.
- * Moving ACL and forward files into config file.
- * Replacing struct gateway with struct forward_spec
- *
- * Revision 1.15 2001/06/03 19:12:00 oes
- * extracted-CGI relevant stuff
- *
- * Revision 1.14 2001/06/01 10:30:55 oes
- * Added optional left-anchoring to domaincmp
- *
- * Revision 1.13 2001/05/31 21:21:30 jongfoster
- * Permissionsfile / actions file changes:
- * - Changed "permission" to "action" throughout
- * - changes to file format to allow string parameters
- * - Moved helper functions to actions.c
- *
- * Revision 1.12 2001/05/31 17:35:20 oes
- *
- * - Enhanced domain part globbing with infix and prefix asterisk
- * matching and optional unanchored operation
- *
- * Revision 1.11 2001/05/29 11:53:23 oes
- * "See why" link added to "blocked" page
- *
- * 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 2001/05/27 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 1.8 2001/05/26 17:13:28 jongfoster
- * Filled in a function comment.
- *
- * Revision 1.7 2001/05/26 15:26:15 jongfoster
- * ACL feature now provides more security by immediately dropping
- * connections from untrusted hosts.
- *
- * Revision 1.6 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 1.5 2001/05/25 22:34:30 jongfoster
- * Hard tabs->Spaces
- *
- * 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 16:44:47 jongfoster
- * Removing last hardcoded Junkbusters.com URLs.
- *
- * Revision 1.2 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 1.1.1.1 2001/05/15 13:58:52 oes
- * Initial import of version 2.9.3 source tree
- *
- *
*********************************************************************/
-\f
+
#include "config.h"
#include <string.h>
#include <assert.h>
-#ifdef HAVE_GETADDRINFO
+#ifdef HAVE_RFC2553
#include <netdb.h>
#include <sys/socket.h>
-#endif /* def HAVE_GETADDRINFO */
+#endif /* def HAVE_RFC2553 */
#ifndef _WIN32
#ifndef __OS2__
static jb_err prepare_for_filtering(struct client_state *csp);
#ifdef FEATURE_ACL
-#ifdef HAVE_GETADDRINFO
+#ifdef HAVE_RFC2553
/*********************************************************************
*
* Function : sockaddr_storage_to_ip
* 3 : len = length of IP address in octets
* 4 : port = port number in network order;
*
- * Returns : 0 = no errror; otherwise
+ * Returns : 0 = no errror; -1 otherwise.
*
*********************************************************************/
-int sockaddr_storage_to_ip(const struct sockaddr_storage *addr, uint8_t **ip,
- unsigned int *len, in_port_t **port)
+static int sockaddr_storage_to_ip(const struct sockaddr_storage *addr,
+ uint8_t **ip, unsigned int *len,
+ in_port_t **port)
{
- if (!addr)
+ if (NULL == addr)
{
return(-1);
}
switch (addr->ss_family)
{
case AF_INET:
- if (len)
+ if (NULL != len)
{
*len = 4;
}
- if (ip)
+ if (NULL != ip)
{
*ip = (uint8_t *)
- &(( (struct sockaddr_in *) addr)->sin_addr.s_addr);
+ &(((struct sockaddr_in *)addr)->sin_addr.s_addr);
}
- if (port)
+ if (NULL != port)
{
- *port = &((struct sockaddr_in *) addr)->sin_port;
+ *port = &((struct sockaddr_in *)addr)->sin_port;
}
break;
case AF_INET6:
- if (len)
+ if (NULL != len)
{
*len = 16;
}
- if (ip)
+ if (NULL != ip)
{
- *ip = ( (struct sockaddr_in6 *) addr)->sin6_addr.s6_addr;
+ *ip = ((struct sockaddr_in6 *)addr)->sin6_addr.s6_addr;
}
- if (port)
+ if (NULL != port)
{
- *port = &((struct sockaddr_in6 *) addr)->sin6_port;
+ *port = &((struct sockaddr_in6 *)addr)->sin6_port;
}
break;
*
* Parameters :
* 1 : network = socket address of subnework
- * 3 : netmask = network mask as socket address
- * 2 : address = checked socket address against given network
+ * 2 : netmask = network mask as socket address
+ * 3 : address = checked socket address against given network
*
* Returns : 0 = doesn't match; 1 = does match
*
*********************************************************************/
-int match_sockaddr(const struct sockaddr_storage *network,
- const struct sockaddr_storage *netmask,
- const struct sockaddr_storage *address)
+static int match_sockaddr(const struct sockaddr_storage *network,
+ const struct sockaddr_storage *netmask,
+ const struct sockaddr_storage *address)
{
uint8_t *network_addr, *netmask_addr, *address_addr;
unsigned int addr_len;
in_port_t *network_port, *netmask_port, *address_port;
int i;
- if (network->ss_family != netmask->ss_family)
+ if (network->ss_family != netmask->ss_family)
{
/* This should never happen */
log_error(LOG_LEVEL_ERROR,
- "Internal error at %s:%llu: network and netmask differ in family",
- __FILE__, __LINE__);
+ "Internal error at %s:%llu: network and netmask differ in family",
+ __FILE__, __LINE__);
return 0;
}
sockaddr_storage_to_ip(address, &address_addr, NULL, &address_port);
/* Check for family */
- if (network->ss_family == AF_INET && address->ss_family == AF_INET6 &&
- IN6_IS_ADDR_V4MAPPED((struct in6_addr *)address_addr))
+ if ((network->ss_family == AF_INET) && (address->ss_family == AF_INET6)
+ && IN6_IS_ADDR_V4MAPPED((struct in6_addr *)address_addr))
{
/* Map AF_INET6 V4MAPPED address into AF_INET */
address_addr += 12;
addr_len = 4;
}
- else if (network->ss_family == AF_INET6 && address->ss_family == AF_INET &&
- IN6_IS_ADDR_V4MAPPED((struct in6_addr *)network_addr))
+ else if ((network->ss_family == AF_INET6) && (address->ss_family == AF_INET)
+ && IN6_IS_ADDR_V4MAPPED((struct in6_addr *)network_addr))
{
/* Map AF_INET6 V4MAPPED network into AF_INET */
network_addr += 12;
}
/* TODO: Optimize by checking by words insted of octets */
- for (i=0; i < addr_len && netmask_addr[i]; i++)
+ for (i = 0; (i < addr_len) && netmask_addr[i]; i++)
{
- if ( (network_addr[i] & netmask_addr[i]) !=
- (address_addr[i] & netmask_addr[i]) )
+ if ((network_addr[i] & netmask_addr[i]) !=
+ (address_addr[i] & netmask_addr[i]))
{
return 0;
}
}
-
+
return 1;
}
-#endif /* def HAVE_GETADDRINFO */
+#endif /* def HAVE_RFC2553 */
/*********************************************************************
while (acl != NULL)
{
if (
-#ifdef HAVE_GETADDRINFO
- match_sockaddr(&acl->src->addr, &acl->src->mask, &csp->tcp_addr)
+#ifdef HAVE_RFC2553
+ match_sockaddr(&acl->src->addr, &acl->src->mask, &csp->tcp_addr)
#else
(csp->ip_addr_long & acl->src->mask) == acl->src->addr
#endif
}
}
else if (
-#ifdef HAVE_GETADDRINFO
- /* XXX: Undefined acl->dst is full of zeros and should be
- * considered as wildcard address.
- * sockaddr_storage_to_ip() failes on such dst because of
- * uknown sa_familly on glibc. However this test is not
- * portable.
+#ifdef HAVE_RFC2553
+ /*
+ * XXX: An undefined acl->dst is full of zeros and should be
+ * considered a wildcard address. sockaddr_storage_to_ip()
+ * fails on such destinations because of unknown sa_familly
+ * (glibc only?). However this test is not portable.
*
* So, we signal the acl->dst is wildcard in wildcard_dst.
*/
int acl_addr(const char *aspec, struct access_control_addr *aca)
{
int i, masklength;
-#ifdef HAVE_GETADDRINFO
+#ifdef HAVE_RFC2553
struct addrinfo hints, *result;
uint8_t *mask_data;
in_port_t *mask_port;
unsigned int addr_len;
#else
long port;
-#endif /* def HAVE_GETADDRINFO */
+#endif /* def HAVE_RFC2553 */
char *p;
char *acl_spec = NULL;
-#ifdef HAVE_GETADDRINFO
- /* FIXME: Depend on ai_family */
+#ifdef HAVE_RFC2553
+ /* XXX: Depend on ai_family */
masklength = 128;
#else
masklength = 32;
}
if ((masklength < 0) ||
-#ifdef HAVE_GETADDRINFO
+#ifdef HAVE_RFC2553
(masklength > 128)
#else
(masklength > 32)
return(-1);
}
- if (*acl_spec == '[' && NULL != (p = strchr(acl_spec, ']')))
+ if ((*acl_spec == '[') && (NULL != (p = strchr(acl_spec, ']'))))
{
*p = '\0';
- memmove(acl_spec, acl_spec + 1, (size_t) (p - acl_spec));
+ memmove(acl_spec, acl_spec + 1, (size_t)(p - acl_spec));
if (*++p != ':')
{
p = strchr(acl_spec, ':');
}
-#ifdef HAVE_GETADDRINFO
+#ifdef HAVE_RFC2553
memset(&hints, 0, sizeof(struct addrinfo));
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
- i = getaddrinfo(acl_spec, (p) ? ++p : NULL, &hints, &result);
- freez(acl_spec);
+ i = getaddrinfo(acl_spec, ((p) ? ++p : NULL), &hints, &result);
if (i != 0)
{
- log_error(LOG_LEVEL_ERROR, "Can not resolve [%s]:%s: %s", acl_spec, p,
- gai_strerror(i));
+ log_error(LOG_LEVEL_ERROR, "Can not resolve [%s]:%s: %s",
+ acl_spec, p, gai_strerror(i));
+ freez(acl_spec);
return(-1);
}
+ freez(acl_spec);
/* TODO: Allow multihomed hostnames */
memcpy(&(aca->addr), result->ai_addr, result->ai_addrlen);
/* XXX: This will be logged as parse error. */
return(-1);
}
-#endif /* def HAVE_GETADDRINFO */
+#endif /* def HAVE_RFC2553 */
/* build the netmask */
-#ifdef HAVE_GETADDRINFO
- /* Clip masklength according current family */
- if (aca->addr.ss_family == AF_INET && masklength > 32)
+#ifdef HAVE_RFC2553
+ /* Clip masklength according to current family. */
+ if ((aca->addr.ss_family == AF_INET) && (masklength > 32))
{
masklength = 32;
}
if (p)
{
- /* Port number in ACL has been specified, check ports in future */
+ /* ACL contains a port number, check ports in the future. */
*mask_port = 1;
}
- /* XXX: This could be optimized to operate on whole words instead of octets
- * (128-bit CPU could do it in one iteration). */
- /* Octets after prefix can be ommitted because of previous initialization
- * to zeros. */
- for (i=0; i < addr_len && masklength; i++)
+ /*
+ * XXX: This could be optimized to operate on whole words instead
+ * of octets (128-bit CPU could do it in one iteration).
+ */
+ /*
+ * Octets after prefix can be ommitted because of
+ * previous initialization to zeros.
+ */
+ for (i = 0; (i < addr_len) && masklength; i++)
{
if (masklength >= 8)
{
}
else
{
- /* XXX: This assumes MSB of octet is on the left site. This should be
- * true for all architectures or solved on link layer of OSI model. */
- mask_data[i] = ~((1 << (8 - masklength)) - 1);
+ /*
+ * XXX: This assumes MSB of octet is on the left side.
+ * This should be true for all architectures or solved
+ * by the link layer.
+ */
+ mask_data[i] = (uint8_t)~((1 << (8 - masklength)) - 1);
masklength = 0;
}
}
* (i.e. save on the network portion of the address).
*/
aca->addr = aca->addr & aca->mask;
-#endif /* def HAVE_GETADDRINFO */
+#endif /* def HAVE_RFC2553 */
return(0);
}
#endif /* Preceeding code is disabled for now */
}
- else if(csp->action->flags & ACTION_HANDLE_AS_EMPTY_DOCUMENT)
+ else
+#endif /* def FEATURE_IMAGE_BLOCKING */
+ if(csp->action->flags & ACTION_HANDLE_AS_EMPTY_DOCUMENT)
{
/*
* Send empty document.
}
}
else
-#endif /* def FEATURE_IMAGE_BLOCKING */
/*
* Else, generate an HTML "blocked" message:
{
filter_function_ptr filter_function = NULL;
+ if ((csp->content_type & CT_TABOO)
+ && !(csp->action->flags & ACTION_FORCE_TEXT_MODE))
+ {
+ return NULL;
+ }
+
/*
* Are we enabling text mode by force?
*/
if (NULL != socks_proxy)
{
/* Parse the SOCKS proxy host[:port] */
- fwd->gateway_host = strdup(socks_proxy);
-
- if (NULL != (socks_proxy = strchr(fwd->gateway_host, ':')))
- {
- *socks_proxy++ = '\0';
- fwd->gateway_port = (int)strtol(socks_proxy, NULL, 0);
- }
-
- if (fwd->gateway_port <= 0)
- {
- fwd->gateway_port = 1080;
- }
+ fwd->gateway_port = 1080;
+ parse_forwarder_address(socks_proxy,
+ &fwd->gateway_host, &fwd->gateway_port);
http_parent = vec[2];
}
/* Parse http forwarding settings */
if (strcmp(http_parent, ".") != 0)
{
- fwd->forward_host = strdup(http_parent);
-
- if (NULL != (http_parent = strchr(fwd->forward_host, ':')))
- {
- *http_parent++ = '\0';
- fwd->forward_port = (int)strtol(http_parent, NULL, 0);
- }
-
- if (fwd->forward_port <= 0)
- {
- fwd->forward_port = 8000;
- }
+ fwd->forward_port = 8000;
+ parse_forwarder_address(http_parent,
+ &fwd->forward_host, &fwd->forward_port);
}
assert (NULL != fwd);
Local Variables:
tab-width: 3
end:
-
- vim:softtabstop=3 shiftwidth=3
*/
projects / privoxy.git / blobdiff