X-Git-Url: http://www.privoxy.org/gitweb/?p=privoxy.git;a=blobdiff_plain;f=filters.c;h=a08dcba1dd92a82781775bb7c99103d5bb488957;hp=9758e1e2472d86fbb5c01cffd806e3edfdb92071;hb=5af5acaa9aa8c28ebcb6eb7be8a5d61b1a4fbf34;hpb=053a74506fc88a5398d27c2afc295315de8f07c9 diff --git a/filters.c b/filters.c index 9758e1e2..a08dcba1 100644 --- a/filters.c +++ b/filters.c @@ -1,4 +1,4 @@ -const char filters_rcs[] = "$Id: filters.c,v 1.116 2009/04/17 11:34:34 fabiankeil Exp $"; +const char filters_rcs[] = "$Id: filters.c,v 1.127 2010/04/03 13:22:56 fabiankeil Exp $"; /********************************************************************* * * File : $Source: /cvsroot/ijbswa/current/filters.c,v $ @@ -13,7 +13,7 @@ const char filters_rcs[] = "$Id: filters.c,v 1.116 2009/04/17 11:34:34 fabiankei * `execute_single_pcrs_command', `rewrite_url', * `get_last_url' * - * Copyright : Written by and Copyright (C) 2001, 2004-2008 the SourceForge + * Copyright : Written by and Copyright (C) 2001, 2004-2009 the * Privoxy team. http://www.privoxy.org/ * * Based on the Internet Junkbuster originally written @@ -38,632 +38,8 @@ const char filters_rcs[] = "$Id: filters.c,v 1.116 2009/04/17 11:34:34 fabiankei * or write to the Free Software Foundation, Inc., 59 * Temple Place - Suite 330, Boston, MA 02111-1307, USA. * - * Revisions : - * $Log: filters.c,v $ - * Revision 1.116 2009/04/17 11:34:34 fabiankeil - * Style cosmetics for the IPv6 code. - * - * Revision 1.115 2009/04/17 11:29:18 fabiankeil - * Compile fix for BSD libc. - * - * 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: http://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 - * - * *********************************************************************/ - + #include "config.h" @@ -674,10 +50,10 @@ const char filters_rcs[] = "$Id: filters.c,v 1.116 2009/04/17 11:34:34 fabiankei #include #include -#ifdef HAVE_GETADDRINFO +#ifdef HAVE_RFC2553 #include #include -#endif /* def HAVE_GETADDRINFO */ +#endif /* def HAVE_RFC2553 */ #ifndef _WIN32 #ifndef __OS2__ @@ -726,7 +102,7 @@ static jb_err remove_chunked_transfer_coding(char *buffer, size_t *size); static jb_err prepare_for_filtering(struct client_state *csp); #ifdef FEATURE_ACL -#ifdef HAVE_GETADDRINFO +#ifdef HAVE_RFC2553 /********************************************************************* * * Function : sockaddr_storage_to_ip @@ -743,8 +119,9 @@ static jb_err prepare_for_filtering(struct client_state *csp); * 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 (NULL == addr) { @@ -807,9 +184,9 @@ int sockaddr_storage_to_ip(const struct sockaddr_storage *addr, uint8_t **ip, * 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; @@ -868,7 +245,7 @@ int match_sockaddr(const struct sockaddr_storage *network, return 1; } -#endif /* def HAVE_GETADDRINFO */ +#endif /* def HAVE_RFC2553 */ /********************************************************************* @@ -901,7 +278,7 @@ int block_acl(const struct access_control_addr *dst, const struct client_state * while (acl != NULL) { if ( -#ifdef HAVE_GETADDRINFO +#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 @@ -917,7 +294,7 @@ int block_acl(const struct access_control_addr *dst, const struct client_state * } } else if ( -#ifdef HAVE_GETADDRINFO +#ifdef HAVE_RFC2553 /* * XXX: An undefined acl->dst is full of zeros and should be * considered a wildcard address. sockaddr_storage_to_ip() @@ -968,18 +345,18 @@ int block_acl(const struct access_control_addr *dst, const struct client_state * 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 +#ifdef HAVE_RFC2553 /* XXX: Depend on ai_family */ masklength = 128; #else @@ -1010,7 +387,7 @@ int acl_addr(const char *aspec, struct access_control_addr *aca) } if ((masklength < 0) || -#ifdef HAVE_GETADDRINFO +#ifdef HAVE_RFC2553 (masklength > 128) #else (masklength > 32) @@ -1036,20 +413,21 @@ int acl_addr(const char *aspec, struct access_control_addr *aca) 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); if (i != 0) { 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); @@ -1079,10 +457,10 @@ int acl_addr(const char *aspec, struct access_control_addr *aca) /* XXX: This will be logged as parse error. */ return(-1); } -#endif /* def HAVE_GETADDRINFO */ +#endif /* def HAVE_RFC2553 */ /* build the netmask */ -#ifdef HAVE_GETADDRINFO +#ifdef HAVE_RFC2553 /* Clip masklength according to current family. */ if ((aca->addr.ss_family == AF_INET) && (masklength > 32)) { @@ -1139,7 +517,7 @@ int acl_addr(const char *aspec, struct access_control_addr *aca) * (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); @@ -1221,7 +599,6 @@ struct http_response *block_url(struct client_state *csp) { log_error(LOG_LEVEL_ERROR, "handle-as-empty-document overruled by handle-as-image."); } -#if 1 /* Two alternative strategies, use this one for now: */ /* and handle accordingly: */ if ((p == NULL) || (0 == strcmpic(p, "pattern"))) @@ -1246,7 +623,6 @@ struct http_response *block_url(struct client_state *csp) return cgi_error_memory(); } } - else if (0 == strcmpic(p, "blank")) { rsp->status = strdup("403 Request blocked by Privoxy"); @@ -1269,7 +645,6 @@ struct http_response *block_url(struct client_state *csp) return cgi_error_memory(); } } - else { rsp->status = strdup("302 Local Redirect from Privoxy"); @@ -1286,32 +661,10 @@ struct http_response *block_url(struct client_state *csp) } } -#else /* Following code is disabled for now */ - - /* and handle accordingly: */ - if ((p == NULL) || (0 == strcmpic(p, "pattern"))) - { - p = CGI_PREFIX "send-banner?type=pattern"; - } - else if (0 == strcmpic(p, "blank")) - { - p = CGI_PREFIX "send-banner?type=blank"; - } - rsp->status = strdup("302 Local Redirect from Privoxy"); - if (rsp->status == NULL) - { - free_http_response(rsp); - return cgi_error_memory(); - } - - if (enlist_unique_header(rsp->headers, "Location", p)) - { - free_http_response(rsp); - return cgi_error_memory(); - } -#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. @@ -1322,7 +675,21 @@ struct http_response *block_url(struct client_state *csp) rsp->body = strdup(" "); rsp->content_length = 1; - rsp->status = strdup("403 Request blocked by Privoxy"); + if (csp->config->feature_flags & RUNTIME_FEATURE_EMPTY_DOC_RETURNS_OK) + { + /* + * Workaround for firefox bug 492459 + * https://bugzilla.mozilla.org/show_bug.cgi?id=492459 + * Return a 200 OK status for pages blocked with +handle-as-empty-document + * if the "handle-as-empty-doc-returns-ok" runtime config option is set. + */ + rsp->status = strdup("200 Request blocked by Privoxy"); + } + else + { + rsp->status = strdup("403 Request blocked by Privoxy"); + } + if (rsp->status == NULL) { free_http_response(rsp); @@ -1339,7 +706,6 @@ struct http_response *block_url(struct client_state *csp) } } else -#endif /* def FEATURE_IMAGE_BLOCKING */ /* * Else, generate an HTML "blocked" message: @@ -2393,6 +1759,12 @@ filter_function_ptr get_filter_function(struct client_state *csp) { 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? */ @@ -2802,18 +2174,9 @@ const static struct forward_spec *get_forward_override_settings(struct client_st 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]; } @@ -2829,18 +2192,9 @@ const static struct forward_spec *get_forward_override_settings(struct client_st /* 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);