X-Git-Url: http://www.privoxy.org/gitweb/?p=privoxy.git;a=blobdiff_plain;f=src%2Fjcc.c;fp=src%2Fjcc.c;h=0000000000000000000000000000000000000000;hp=47b4c83b9fade7146fd34a4379abd0fbd9bf8956;hb=72081f829de368392d04076728f8c991178c0080;hpb=701f0d2c06084708ab71fe06ded88d4b666dc826 diff --git a/src/jcc.c b/src/jcc.c deleted file mode 100644 index 47b4c83b..00000000 --- a/src/jcc.c +++ /dev/null @@ -1,2651 +0,0 @@ -const char jcc_rcs[] = "$Id: jcc.c,v 2.7 2003/09/25 01:44:33 david__schmidt Exp $"; -/********************************************************************* - * - * File : $Source: /cvsroot/ijbswa/current/src/jcc.c,v $ - * - * Purpose : Main file. Contains main() method, main loop, and - * the main connection-handling function. - * - * 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: jcc.c,v $ - * Revision 2.7 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 2.6 2003/06/24 12:24:24 oes - * Added a line plus Fix-me as a reminder to fix broken force handling in trunk. Thanks to lionel for the hint - * - * Revision 2.5 2003/01/26 20:24:26 david__schmidt - * Updated activity console instrumentation locations - * - * Revision 2.4 2002/12/28 03:58:19 david__schmidt - * Initial drop of dashboard instrumentation - enabled with - * --enable-activity-console - * - * Revision 2.3 2002/07/18 22:06:12 jongfoster - * Trivial formatting changes - * - * Revision 2.2 2002/07/12 04:26:17 agotneja - * Re-factored 'chat()' to become understandable and maintainable as - * a first step in adding Transparent Proxy functionality. - * - * Added several new static functions in jcc.c, and moved some data - * parameters up into project.h to allow them to be passed between - * the new functions. - * - * Revision 1.91 2002/04/08 20:35:58 swa - * fixed JB spelling - * - * Revision 1.90 2002/04/02 14:57:28 oes - * Made sending wafers independent of FEATURE_COOKIE_JAR - * - * Revision 1.89 2002/03/31 17:18:59 jongfoster - * Win32 only: Enabling STRICT to fix a VC++ compile warning. - * - * Revision 1.88 2002/03/27 14:32:43 david__schmidt - * More compiler warning message maintenance - * - * Revision 1.87 2002/03/26 22:29:54 swa - * we have a new homepage! - * - * Revision 1.86 2002/03/25 17:04:55 david__schmidt - * Workaround for closing the jarfile before load_config() comes around again - * - * Revision 1.85 2002/03/24 15:23:33 jongfoster - * Name changes - * - * Revision 1.84 2002/03/24 13:25:43 swa - * name change related issues - * - * Revision 1.83 2002/03/16 23:54:06 jongfoster - * Adding graceful termination feature, to help look for memory leaks. - * If you enable this (which, by design, has to be done by hand - * editing config.h) and then go to http://i.j.b/die, then the program - * will exit cleanly after the *next* request. It should free all the - * memory that was used. - * - * Revision 1.82 2002/03/13 00:27:05 jongfoster - * Killing warnings - * - * Revision 1.81 2002/03/12 01:42:50 oes - * Introduced modular filters - * - * Revision 1.80 2002/03/11 22:07:05 david__schmidt - * OS/2 port maintenance: - * - Fixed EMX build - it had decayed a little - * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro. - * substituted a memset for now. - * - * Revision 1.79 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 1.78 2002/03/08 21:35:04 oes - * Added optional group supplement to --user option. Will now use default group of user if no group given - * - * Revision 1.77 2002/03/07 03:52:06 oes - * - Fixed compiler warnings etc - * - Improved handling of failed DNS lookups - * - * Revision 1.76 2002/03/06 22:54:35 jongfoster - * Automated function-comment nitpicking. - * - * Revision 1.75 2002/03/06 10:02:19 oes - * Fixed stupid bug when --user was not given - * - * Revision 1.74 2002/03/06 00:49:31 jongfoster - * Fixing warning on Windows - * Making #ifdefs that refer to the same variable consistently - * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2 - * - * Revision 1.73 2002/03/05 23:57:30 hal9 - * Stray character 's' on line 1618 was breaking build. - * - * Revision 1.72 2002/03/05 21:33:45 david__schmidt - * - Re-enable OS/2 building after new parms were added - * - Fix false out of memory report when resolving CGI templates when no IP - * address is available of failed attempt (a la no such domain) - * - * Revision 1.71 2002/03/05 18:13:56 oes - * Added --user option - * - * Revision 1.70 2002/03/05 04:52:42 oes - * Deleted non-errlog debugging code - * - * Revision 1.69 2002/03/04 23:50:00 jongfoster - * Splitting off bind_port() call into bind_port_helper(), with - * improved logging. - * - * Revision 1.68 2002/03/04 20:17:32 oes - * Fixed usage info - * - * Revision 1.67 2002/03/04 18:18:57 oes - * - Removed _DEBUG mode - * - Cleand up cmdline parsing - * - Introduced --no-daemon, --pidfile options - * - Cleaned up signal handling: - * - Terminate cleanly on INT, TERM and ABRT - * - Schedule logfile for re-opening on HUP - * - Ignore CHLD and PIPE - * - Leave the rest with their default handlers - * - Uniform handler registration - * - Added usage() function - * - Played styleguide police - * - * Revision 1.66 2002/03/03 15:06:55 oes - * Re-enabled automatic config reloading - * - * Revision 1.65 2002/03/03 14:49:11 oes - * Fixed CLF logging: Now uses client's original HTTP request - * - * Revision 1.64 2002/03/03 09:18:03 joergs - * Made jumbjuster work on AmigaOS again. - * - * Revision 1.63 2002/03/02 04:14:50 david__schmidt - * Clean up a little CRLF unpleasantness that suddenly appeared - * - * Revision 1.62 2002/02/20 23:17:23 jongfoster - * Detecting some out-of memory conditions and exiting with a log message. - * - * Revision 1.61 2002/01/17 21:01:52 jongfoster - * Moving all our URL and URL pattern parsing code to urlmatch.c. - * - * Revision 1.60 2001/12/30 14:07:32 steudten - * - Add signal handling (unix) - * - Add SIGHUP handler (unix) - * - Add creation of pidfile (unix) - * - Add action 'top' in rc file (RH) - * - Add entry 'SIGNALS' to manpage - * - Add exit message to logfile (unix) - * - * Revision 1.59 2001/12/13 14:07:18 oes - * Fixed Bug: 503 error page now sent OK - * - * Revision 1.58 2001/11/30 23:37:24 jongfoster - * Renaming the Win32 config file to config.txt - this is almost the - * same as the corresponding UNIX name "config" - * - * Revision 1.57 2001/11/16 00:47:43 jongfoster - * Changing the tty-disconnection code to use setsid(). - * - * Revision 1.56 2001/11/13 20:20:54 jongfoster - * Tabs->spaces, fixing a bug with missing {} around an if() - * - * Revision 1.55 2001/11/13 20:14:53 jongfoster - * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic - * - * Revision 1.54 2001/11/07 00:03:14 steudten - * Give reliable return value if an error - * occurs not just 0 with new daemon mode. - * - * Revision 1.53 2001/11/05 21:41:43 steudten - * Add changes to be a real daemon just for unix os. - * (change cwd to /, detach from controlling tty, set - * process group and session leader to the own process. - * Add DBG() Macro. - * Add some fatal-error log message for failed malloc(). - * Add '-d' if compiled with 'configure --with-debug' to - * enable debug output. - * - * Revision 1.52 2001/10/26 20:11:20 jongfoster - * Fixing type mismatch - * - * Revision 1.51 2001/10/26 17:38:28 oes - * Cosmetics - * - * Revision 1.50 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 1.49 2001/10/23 21:41:35 jongfoster - * Added call to initialize the (statically-allocated of course) - * "out of memory" CGI response. - * - * Revision 1.48 2001/10/10 19:56:46 jongfoster - * Moving some code that wasn't cookie-related out of an #ifdef - * FEATURE_COOKIE_JAR - * - * Revision 1.47 2001/10/10 16:44:36 oes - * Added CONNECT destination port limitation check - * - * Revision 1.46 2001/10/08 15:17:41 oes - * Re-enabled SSL forwarding - * - * Revision 1.45 2001/10/07 15:42:11 oes - * Replaced 6 boolean members of csp with one bitmap (csp->flags) - * - * Moved downgrading of the HTTP version from parse_http_request to - * chat(), since we can't decide if it is necessary before we have - * determined the actions for the URL. The HTTP command is now - * *always* re-built so the repairs need no longer be special-cased. - * - * filter_popups now gets a csp pointer so it can raise the new - * CSP_FLAG_MODIFIED flag. - * - * Bugfix - * - * Added configurable size limit for the IOB. If the IOB grows so - * large that the next read would exceed the limit, the header - * is generated, and the header & unfiltered buffer are flushed - * to the client. Chat then continues in non-buffering, - * non-filtering body mode. - * - * Revision 1.44 2001/10/02 18:13:57 oes - * Ooops - * - * Revision 1.43 2001/10/02 15:32:13 oes - * Moved generation of hdr - * - * Revision 1.42 2001/09/21 23:02:02 david__schmidt - * Cleaning up 2 compiler warnings on OS/2. - * - * Revision 1.41 2001/09/16 17:05:14 jongfoster - * Removing unused #include showarg.h - * - * Revision 1.40 2001/09/16 15:41:45 jongfoster - * Fixing signed/unsigned comparison warning. - * - * Revision 1.39 2001/09/16 13:21:27 jongfoster - * Changes to use new list functions. - * - * Revision 1.38 2001/09/16 13:01:46 jongfoster - * Removing redundant function call that zeroed zalloc()'d memory. - * - * Revision 1.37 2001/09/10 11:12:24 oes - * Deleted unused variable - * - * Revision 1.36 2001/09/10 10:56:15 oes - * Silenced compiler warnings - * - * Revision 1.35 2001/07/31 14:44:22 oes - * Deleted unused size parameter from filter_popups() - * - * Revision 1.34 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 1.33 2001/07/29 19:32:00 jongfoster - * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance. - * - * Revision 1.32 2001/07/29 18:47:05 jongfoster - * Adding missing #include "loadcfg.h" - * - * Revision 1.31 2001/07/29 12:17:48 oes - * Applied pthread fix by Paul Lieverse - * - * Revision 1.30 2001/07/25 22:57:13 jongfoster - * __BEOS__ no longer overrides FEATURE_PTHREAD. - * This is because FEATURE_PTHREAD will soon be widely used, so I - * want to keep it simple. - * - * Revision 1.29 2001/07/24 12:47:06 oes - * Applied BeOS support update by Eugenia - * - * Revision 1.28 2001/07/23 13:26:12 oes - * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body - * - * Revision 1.27 2001/07/19 19:09:47 haroon - * - Added code to take care of the situation where while processing the first - * server response (which includes the server header), after finding the end - * of the headers we were not looking past the end of the headers for - * content modification. I enabled it for filter_popups. - * Someone else should look to see if other similar operations should be - * done to the discarded portion of the buffer. - * - * Note 2001/07/20: No, the other content modification mechanisms will process - * the whole iob later anyway. --oes - * - * Revision 1.26 2001/07/18 12:31:36 oes - * cosmetics - * - * Revision 1.25 2001/07/15 19:43:49 jongfoster - * Supports POSIX threads. - * Also removed some unused #includes. - * - * Revision 1.24 2001/07/13 14:00:40 oes - * - Generic content modification scheme: - * Each feature has its own applicability flag that is set - * from csp->action->flags. - * Replaced the "filtering" int flag , by a function pointer - * "content_filter" to the function that will do the content - * modification. If it is != NULL, the document will be buffered - * and processed through *content_filter, which must set - * csp->content_length and return a modified copy of the body - * or return NULL (on failiure). - * - Changed csp->is_text to the more generic bitmap csp->content_type - * which can currently take the valued CT_TEXT or CT_GIF - * - Reformatting etc - * - Removed all #ifdef PCRS - * - * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon - * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude - * the `block_acl' call. This prevents a compilation error when the user - * does not wish to use the "ACL" feature. - * - * Revision 1.22 2001/06/29 21:45:41 oes - * Indentation, CRLF->LF, Tab-> Space - * - * Revision 1.21 2001/06/29 13:29:36 oes - * - Cleaned up, improved comments - * - Unified all possible interceptors (CGI, - * block, trust, fast_redirect) in one - * place, with one (CGI) answer generation - * mechansim. Much clearer now. - * - Removed the GIF image generation, which - * is now done in filters.c:block_url() - * - Made error conditions like domain lookup - * failiure or (various) problems while talking - * to the server use cgi.c:error_response() - * instead of generating HTML/HTTP in chat() (yuck!) - * - Removed logentry from cancelled commit - * - * Revision 1.20 2001/06/09 10:55:28 jongfoster - * Changing BUFSIZ ==> BUFFER_SIZE - * - * Revision 1.19 2001/06/07 23:12:52 jongfoster - * Replacing function pointer in struct gateway with a directly - * called function forwarded_connect(). - * Replacing struct gateway with struct forward_spec - * - * Revision 1.18 2001/06/03 19:12:16 oes - * introduced new cgi handling - * - * Revision 1.17 2001/06/01 20:07:23 jongfoster - * Now uses action +image-blocker{} rather than config->tinygif - * - * Revision 1.16 2001/06/01 18:49:17 jongfoster - * Replaced "list_share" with "list" - the tiny memory gain was not - * worth the extra complexity. - * - * Revision 1.15 2001/05/31 21:24:47 jongfoster - * Changed "permission" to "action" throughout. - * Removed DEFAULT_USER_AGENT - it must now be specified manually. - * Moved vanilla wafer check into chat(), since we must now - * decide whether or not to add it based on the URL. - * - * Revision 1.14 2001/05/29 20:14:01 joergs - * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads - * increased. - * - * Revision 1.13 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 1.12 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 1.11 2001/05/26 17:27:53 jongfoster - * Added support for CLF and fixed LOG_LEVEL_LOG. - * Also did CRLF->LF fix of my previous patch. - * - * Revision 1.10 2001/05/26 15:26:15 jongfoster - * ACL feature now provides more security by immediately dropping - * connections from untrusted hosts. - * - * Revision 1.9 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 1.8 2001/05/25 22:43:18 jongfoster - * Fixing minor memory leak and buffer overflow. - * - * Revision 1.7 2001/05/25 22:34:30 jongfoster - * Hard tabs->Spaces - * - * Revision 1.6 2001/05/23 00:13:58 joergs - * AmigaOS support fixed. - * - * Revision 1.5 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 1.4 2001/05/21 19:34:01 jongfoster - * Made failure to bind() a fatal error. - * - * 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 22:34:44 oes - * - Added hint on GIF char array generation to jcc.c - * - Cleaned CRLF's from the sources and related files - * - Repaired logging for REF and FRC - * - * Revision 1.1.1.1 2001/05/15 13:58:56 oes - * Initial import of version 2.9.3 source tree - * - * - *********************************************************************/ - - -#include "config.h" - -#include -#include -#include -#include -#include -#include -#include - -#ifdef FEATURE_PTHREAD -#include -#endif /* def FEATURE_PTHREAD */ - -#ifdef _WIN32 -# ifndef FEATURE_PTHREAD -# ifndef STRICT -# define STRICT -# endif -# include -# include -# endif /* ndef FEATURE_PTHREAD */ - -# include "win32.h" -# ifndef _WIN_CONSOLE -# include "w32log.h" -# endif /* ndef _WIN_CONSOLE */ - -#else /* ifndef _WIN32 */ - -# if !defined (__OS2__) -# include -# include -# endif /* ndef __OS2__ */ -# include -# include -# include - -#ifdef sun -#include -#endif /* sun */ - -#ifdef unix -#include -#include -#endif - -# include - -# ifdef __BEOS__ -# include /* BeOS has select() for sockets only. */ -# include /* declarations for threads and stuff. */ -# endif - -# if defined(__EMX__) || defined(__OS2__) -# include /* OS/2/EMX needs a little help with select */ -# endif -# ifdef __OS2__ -#define INCL_DOS -# include -#define bzero(B,N) memset(B,0x00,n) -# endif - -# ifndef FD_ZERO -# include -# endif - -#endif - -#include "project.h" -#include "list.h" -#include "jcc.h" -#include "filters.h" -#include "loaders.h" -#include "parsers.h" -#include "killpopup.h" -#include "miscutil.h" -#include "errlog.h" -#include "jbsockets.h" -#include "gateway.h" -#include "actions.h" -#include "cgi.h" -#include "loadcfg.h" -#include "urlmatch.h" -#ifdef FEATURE_ACTIVITY_CONSOLE -#include "stats.h" -#endif /* def FEATURE_ACTIVITY_CONSOLE */ - -const char jcc_h_rcs[] = JCC_H_VERSION; -const char project_h_rcs[] = PROJECT_H_VERSION; - -int no_daemon = 0; -struct client_state clients[1]; -struct file_list files[1]; - -#ifdef FEATURE_STATISTICS -int urls_read = 0; /* total nr of urls read inc rejected */ -int urls_rejected = 0; /* total nr of urls rejected */ -#endif /* def FEATURE_STATISTICS */ - -#ifdef FEATURE_GRACEFUL_TERMINATION -int g_terminate = 0; -#endif - -static void listen_loop(void); -static void chat(struct client_state *csp); -static jb_err relay_server_traffic( struct client_state *csp ) ; -static jb_err read_client_headers( struct client_state *csp, struct http_request *http ) ; -static jb_err process_client_headers( struct client_state *csp, struct http_request *http ) ; -static jb_err intercept_page( struct client_state *csp, struct http_request *http ); -static jb_err open_forwarding_connection( struct client_state *csp ); -static jb_err send_client_headers_to_server( struct client_state *csp, struct http_request *http, char* hdr ); -static jb_err is_connect_request_allowed( struct client_state *csp ) ; - - -#ifdef AMIGA -void serve(struct client_state *csp); -#else /* ifndef AMIGA */ -static void serve(struct client_state *csp); -#endif /* def AMIGA */ - -#ifdef __BEOS__ -static int32 server_thread(void *data); -#endif /* def __BEOS__ */ - -#ifdef _WIN32 -#define sleep(N) Sleep(((N) * 1000)) -#endif - -#ifdef __OS2__ -#define sleep(N) DosSleep(((N) * 100)) -#endif - -#ifdef OSX_DARWIN -/* - * Hit OSX over the head with a hammer. Protect all *_r functions. - */ -pthread_mutex_t gmtime_mutex; -pthread_mutex_t localtime_mutex; -pthread_mutex_t gethostbyaddr_mutex; -pthread_mutex_t gethostbyname_mutex; -#endif /* def OSX_DARWIN */ - -#if defined(unix) || defined(__EMX__) -const char *basedir = NULL; -const char *pidfile = NULL; -int received_hup_signal = 0; -#endif /* defined unix */ - -/* The vanilla wafer. */ -static const char VANILLA_WAFER[] = - "NOTICE=TO_WHOM_IT_MAY_CONCERN_" - "Do_not_send_me_any_copyrighted_information_other_than_the_" - "document_that_I_am_requesting_or_any_of_its_necessary_components._" - "In_particular_do_not_send_me_any_cookies_that_" - "are_subject_to_a_claim_of_copyright_by_anybody._" - "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_" - "(copyright_or_otherwise)_applying_to_any_cookie._"; - -/** - * HTTP header sent when doing HTTPS tunnelling ("CONNECT" method). - */ -static const char CSUCCEED[] = - "HTTP/1.0 200 Connection established\n" - "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n"; - - -/** - * HTTP reply sent when the browser sends something unintelligible. - */ -static const char CHEADER[] = - "HTTP/1.0 400 Invalid header received from browser\r\n\r\n"; - - -/** - * HTTP reply sent when the browser tries to tunnel ("CONNECT") to something - * other than a HTTPS port (as defined by +limit-connect). - */ -static const char CFORBIDDEN[] = - "HTTP/1.0 403 Connection not allowable\r\nX-Hint: If you read this message interactively, then you know why this happens ,-)\r\n\r\n"; - -#if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA) -/********************************************************************* - * - * Function : sig_handler - * - * Description : Signal handler for different signals. - * Exit gracefully on ABRT, TERM and INT - * or set a flag that will cause the errlog - * to be reopened by the main thread on HUP. - * - * Parameters : - * 1 : the_signal = the signal cause this function to call - * - * Returns : - - * - *********************************************************************/ -static void sig_handler(int the_signal) -{ - switch(the_signal) - { - case SIGABRT: - case SIGTERM: - case SIGINT: - log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal); -#if defined(unix) - unlink(pidfile); -#endif /* unix */ - exit(the_signal); - break; - - case SIGHUP: - received_hup_signal = 1; - break; - - default: - /* - * We shouldn't be here, unless we catch signals - * in main() that we can't handle here! - */ - log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal); - } - return; - -} -#endif - - -/********************************************************************* - * - * Function : chat - * - * Description : Once a connection to the client has been accepted, - * this function is called (via serve()) to handle the - * main business of the communication. When this - * function returns, the caller must close the client - * socket handle. - * - * Parameters : - * 1 : csp = Current client state (buffers, headers, etc...) - * - * Returns : void - * - *********************************************************************/ -static void chat(struct client_state *csp) -{ - - - char buf[BUFFER_SIZE]; - int len; /* for buffer sizes */ - char *hdr; - fd_set rfds; - int n; - jb_socket maxfd; - int byte_count = 0; - struct http_request *http; - - http = csp->http; - - if (read_client_headers(csp, http ) != JB_ERR_OK ) - return; - - - /* Process the client headers */ - if (process_client_headers(csp, http) != JB_ERR_OK) - return; - - - /* Check if this connection request is permitted */ - if (is_connect_request_allowed(csp) != JB_ERR_OK) - return ; - - /* - * We have a valid and legit request. Now, check to see if we need to - * intercept it. - */ - if (intercept_page(csp, http) != JB_ERR_OK) - return; - - /* - * The page passed the intercept routine, so open a forwarding - * connection for conversation - */ - if (open_forwarding_connection(csp) != JB_ERR_OK ) - return ; - - - - hdr = sed(client_patterns, add_client_headers, csp); - if (hdr == NULL) - { - /* FIXME Should handle error properly */ - log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header"); - } - - /* FIXME - where should this go, logically ? */ - list_remove_all(csp->headers); - - - if (send_client_headers_to_server(csp, http, hdr) != JB_ERR_OK) - return ; - - - /* we're finished with the client's header */ - freez(hdr); - - maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd; - - /* pass data between the client and server - * until one or the other shuts down the connection. - */ - - /* Set the flag for reading headers to False */ - /* This is used in relay_server_traffic */ - csp->all_headers_read = 0 ; - - for (;;) - { - jb_err tmp_ret_val = JB_ERR_GENERIC ; - -#ifdef __OS2__ - /* - * FD_ZERO here seems to point to an errant macro which crashes. - * So do this by hand for now... - */ - memset(&rfds,0x00,sizeof(fd_set)); -#else - FD_ZERO(&rfds); -#endif - FD_SET(csp->cfd, &rfds); - FD_SET(csp->sfd, &rfds); - - n = select((int)maxfd+1, &rfds, NULL, NULL, NULL); - - if (n < 0) - { - log_error(LOG_LEVEL_ERROR, "select() failed!: %E"); - return; - } - - /* - * This is the body of the browser's request. - * Just read it and write it. - */ - - if (FD_ISSET(csp->cfd, &rfds)) - { - len = read_socket(csp->cfd, buf, sizeof(buf)); - - if (len <= 0) - { - log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d", - csp->ip_addr_str, http->ocmd, byte_count); - return ; - } - - if (write_socket(csp->sfd, buf, (size_t)len)) - { - log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host); - return; - } - continue; - } - - /* - * Check if the server wants to talk, and if so, converse. - */ - - if (FD_ISSET(csp->sfd, &rfds)) - tmp_ret_val = relay_server_traffic(csp) ; - - - if (tmp_ret_val == JB_ERR_OK) - continue ; - else - return; - } - /* We should never get here! */ - log_error(LOG_LEVEL_FATAL, "chat() : logic error in for() loop" ) ; -} /* END chat() */ - - -/********************************************************************* - * - * Function : serve - * - * Description : This is little more than chat. We only "serve" to - * to close any socket that chat may have opened. - * - * Parameters : - * 1 : csp = Current client state (buffers, headers, etc...) - * - * Returns : N/A - * - *********************************************************************/ -#ifdef AMIGA -void serve(struct client_state *csp) -#else /* ifndef AMIGA */ -static void serve(struct client_state *csp) -#endif /* def AMIGA */ -{ - chat(csp); - close_socket(csp->cfd); - - if (csp->sfd != JB_INVALID_SOCKET) - { - close_socket(csp->sfd); - } - - csp->flags &= ~CSP_FLAG_ACTIVE; - -} - - -#ifdef __BEOS__ -/********************************************************************* - * - * Function : server_thread - * - * Description : We only exist to call `serve' in a threaded environment. - * - * Parameters : - * 1 : data = Current client state (buffers, headers, etc...) - * - * Returns : Always 0. - * - *********************************************************************/ -static int32 server_thread(void *data) -{ - serve((struct client_state *) data); - return 0; - -} -#endif - - -/********************************************************************* - * - * Function : usage - * - * Description : Print usage info & exit. - * - * Parameters : Pointer to argv[0] for identifying ourselves - * - * Returns : No. ,-) - * - *********************************************************************/ -void usage(const char *myname) -{ - printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n" - "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n" - "Aborting.\n", myname); - - exit(2); - -} - - -/********************************************************************* - * - * Function : main - * - * Description : Load the config file and start the listen loop. - * This function is a lot more *sane* with the `load_config' - * and `listen_loop' functions; although it stills does - * a *little* too much for my taste. - * - * Parameters : - * 1 : argc = Number of parameters (including $0). - * 2 : argv = Array of (char *)'s to the parameters. - * - * Returns : 1 if : can't open config file, unrecognized directive, - * stats requested in multi-thread mode, can't open the - * log file, can't open the jar file, listen port is invalid, - * any load fails, and can't bind port. - * - * Else main never returns, the process must be signaled - * to terminate execution. Or, on Windows, use the - * "File", "Exit" menu option. - * - *********************************************************************/ -#ifdef __MINGW32__ -int real_main(int argc, const char *argv[]) -#else -int main(int argc, const char *argv[]) -#endif -{ - int argc_pos = 0; -#ifdef unix - struct passwd *pw = NULL; - struct group *grp = NULL; - char *p; -#endif - - Argc = argc; - Argv = argv; - - configfile = -#if !defined(_WIN32) - "config" -#else - "config.txt" -#endif - ; - - /* - * Parse the command line arguments - */ - while (++argc_pos < argc) - { -#if !defined(_WIN32) || defined(_WIN_CONSOLE) - - if (strcmp(argv[argc_pos], "--help") == 0) - { - usage(argv[0]); - } - - else if(strcmp(argv[argc_pos], "--version") == 0) - { - printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"); - exit(0); - } - - else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0) - { - no_daemon = 1; - } -#if defined(unix) - else if (strcmp(argv[argc_pos], "--pidfile" ) == 0) - { - if (++argc_pos == argc) usage(argv[0]); - pidfile = strdup(argv[argc_pos]); - } - - else if (strcmp(argv[argc_pos], "--user" ) == 0) - { - if (++argc_pos == argc) usage(argv[argc_pos]); - - if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0') - { - *p++ = '\0'; - if (NULL == (grp = getgrnam(p))) - { - log_error(LOG_LEVEL_FATAL, "Group %s not found.", p); - } - } - - if (NULL == (pw = getpwnam(argv[argc_pos]))) - { - log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]); - } - - if (p != NULL) *--p = '\0'; - } -#endif /* defined(unix) */ - else -#endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */ - { - configfile = argv[argc_pos]; - } - - } /* -END- while (more arguments) */ - -#if defined(unix) - if ( *configfile != '/' ) - { - char *abs_file; - - /* make config-filename absolute here */ - if ( !(basedir = getcwd( NULL, 1024 ))) - { - perror("get working dir failed"); - exit( 1 ); - } - - if ( !(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))) - { - perror("malloc failed"); - exit( 1 ); - } - strcpy( abs_file, basedir ); - strcat( abs_file, "/" ); - strcat( abs_file, configfile ); - configfile = abs_file; - } -#endif /* defined unix */ - - - files->next = NULL; - -#ifdef AMIGA - InitAmiga(); -#elif defined(_WIN32) - InitWin32(); -#endif - -#ifdef OSX_DARWIN - /* - * Prepare global mutex semaphores - */ - pthread_mutex_init(&gmtime_mutex,0); - pthread_mutex_init(&localtime_mutex,0); - pthread_mutex_init(&gethostbyaddr_mutex,0); - pthread_mutex_init(&gethostbyname_mutex,0); -#endif /* def OSX_DARWIN */ - - /* - * Unix signal handling - * - * Catch the abort, interrupt and terminate signals for a graceful exit - * Catch the hangup signal so the errlog can be reopened. - * Ignore the broken pipe and child signals - * FIXME: Isn't ignoring the default for SIGCHLD anyway and why ignore SIGPIPE? - */ -#if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA) -{ - int idx; - const int catched_signals[] = { SIGABRT, SIGTERM, SIGINT, SIGHUP, 0 }; - const int ignored_signals[] = { SIGPIPE, SIGCHLD, 0 }; - - for (idx = 0; catched_signals[idx] != 0; idx++) - { - if (signal(catched_signals[idx], sig_handler) == SIG_ERR) - { - log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]); - } - } - - for (idx = 0; ignored_signals[idx] != 0; idx++) - { - if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR) - { - log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]); - } - } - -} -#else /* ifdef _WIN32 */ -# ifdef _WIN_CONSOLE - /* - * We *are* in a windows console app. - * Print a verbose messages about FAQ's and such - */ - printf(win32_blurb); -# endif /* def _WIN_CONSOLE */ -#endif /* def _WIN32 */ - - - /* Initialize the CGI subsystem */ - cgi_init_error_messages(); - - /* - * If runnig on unix and without the --nodaemon - * option, become a daemon. I.e. fork, detach - * from tty and get process group leadership - */ -#if defined(unix) - { - pid_t pid = 0; -#if 0 - int fd; -#endif - - if (!no_daemon) - { - pid = fork(); - - if ( pid < 0 ) /* error */ - { - perror("fork"); - exit( 3 ); - } - else if ( pid != 0 ) /* parent */ - { - int status; - pid_t wpid; - /* - * must check for errors - * child died due to missing files aso - */ - sleep( 1 ); - wpid = waitpid( pid, &status, WNOHANG ); - if ( wpid != 0 ) - { - exit( 1 ); - } - exit( 0 ); - } - /* child */ -#if 1 - /* Should be more portable, but not as well tested */ - setsid(); -#else /* !1 */ -#ifdef __FreeBSD__ - setpgrp(0,0); -#else /* ndef __FreeBSD__ */ - setpgrp(); -#endif /* ndef __FreeBSD__ */ - fd = open("/dev/tty", O_RDONLY); - if ( fd ) - { - /* no error check here */ - ioctl( fd, TIOCNOTTY,0 ); - close ( fd ); - } -#endif /* 1 */ - /* FIXME: should close stderr (fd 2) here too, but the test - * for existence - * and load config file is done in listen_loop() and puts - * some messages on stderr there. - */ - - close( 0 ); - close( 1 ); - chdir("/"); - - } /* -END- if (!no_daemon) */ - - /* - * As soon as we have written the PID file, we can switch - * to the user and group ID indicated by the --user option - */ - write_pid_file(); - - if (NULL != pw) - { - if (((NULL != grp) && setgid(grp->gr_gid)) || (setgid(pw->pw_gid))) - { - log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions."); - } - if (setuid(pw->pw_uid)) - { - log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions."); - } - } - } -#endif /* defined unix */ - - listen_loop(); - - /* NOTREACHED */ - return(-1); - -} - - -/********************************************************************* - * - * Function : bind_port_helper - * - * Description : Bind the listen port. Handles logging, and aborts - * on failure. - * - * Parameters : - * 1 : config = Privoxy configuration. Specifies port - * to bind to. - * - * Returns : Port that was opened. - * - *********************************************************************/ -static jb_socket bind_port_helper(struct configuration_spec * config) -{ - int result; - jb_socket bfd; - - if ( (config->haddr != NULL) - && (config->haddr[0] == '1') - && (config->haddr[1] == '2') - && (config->haddr[2] == '7') - && (config->haddr[3] == '.') ) - { - log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only", - config->hport); - } - else if (config->haddr == NULL) - { - log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses", - config->hport); - } - else - { - log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s", - config->hport, config->haddr); - } - - result = bind_port(config->haddr, config->hport, &bfd); - - if (result < 0) - { - switch(result) - { - case -3 : - log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: " - "There may be another Privoxy or some other " - "proxy running on port %d", - (NULL != config->haddr) ? config->haddr : "INADDR_ANY", - config->hport, config->hport); - - case -2 : - log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: " - "The hostname is not resolvable", - (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport); - - default : - log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E", - (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport); - } - - /* shouldn't get here */ - return JB_INVALID_SOCKET; - } - - config->need_bind = 0; - - return bfd; -} - - -/********************************************************************* - * - * Function : listen_loop - * - * Description : bind the listen port and enter a "FOREVER" listening loop. - * - * Parameters : N/A - * - * Returns : Never. - * - *********************************************************************/ -static void listen_loop(void) -{ - struct client_state *csp = NULL; - jb_socket bfd; - struct configuration_spec * config; - - config = load_config(); - - bfd = bind_port_helper(config); - -#ifdef FEATURE_ACTIVITY_CONSOLE - init_stats_config(config); -#endif /* def FEATURE_ACTIVITY_CONSOLE */ - -#ifdef FEATURE_GRACEFUL_TERMINATION - while (!g_terminate) -#else - for (;;) -#endif - { -#if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__) - while (waitpid(-1, NULL, WNOHANG) > 0) - { - /* zombie children */ - } -#endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */ - - /* - * Free data that was used by died threads - */ - sweep(); - -#if defined(unix) - /* - * Re-open the errlog after HUP signal - */ - if (received_hup_signal) - { - init_error_log(Argv[0], config->logfile, config->debug); - received_hup_signal = 0; - } -#endif - -#ifdef __OS2__ -#ifdef FEATURE_COOKIE_JAR - /* - * Need a workaround here: we have to fclose() the jarfile, or we die because it's - * already open. I think unload_configfile() is not being run, which should do - * this work. Until that can get resolved, we'll use this workaround. - * - * [Note from Jon: We don't unload_configfile() until all existing threads have - * exited - they're likely to hang aroung transferring data to the browser.] - */ - if (csp) - if(csp->config) - if (csp->config->jar) - { - fclose(csp->config->jar); - csp->config->jar = NULL; - } -#endif /* FEATURE_COOKIE_JAR */ -#endif /* __OS2__ */ - - if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) ) - { - log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp)); - continue; - } - - csp->flags |= CSP_FLAG_ACTIVE; - csp->sfd = JB_INVALID_SOCKET; - - csp->config = config = load_config(); - - if ( config->need_bind ) - { - /* - * Since we were listening to the "old port", we will not see - * a "listen" param change until the next IJB request. So, at - * least 1 more request must be made for us to find the new - * setting. I am simply closing the old socket and binding the - * new one. - * - * Which-ever is correct, we will serve 1 more page via the - * old settings. This should probably be a "show-proxy-args" - * request. This should not be a so common of an operation - * that this will hurt people's feelings. - */ - - close_socket(bfd); - - bfd = bind_port_helper(config); - } - - log_error(LOG_LEVEL_CONNECT, "accept connection ... "); - - if (!accept_connection(csp, bfd)) - { - log_error(LOG_LEVEL_CONNECT, "accept failed: %E"); - -#ifdef AMIGA - if(!childs) - { - exit(1); - } -#endif - freez(csp); - continue; - } - else - { - log_error(LOG_LEVEL_CONNECT, "OK"); - } - -#ifdef FEATURE_TOGGLE - if (g_bToggleIJB) - { - csp->flags |= CSP_FLAG_TOGGLED_ON; - } -#endif /* def FEATURE_TOGGLE */ - -#ifdef FEATURE_ACTIVITY_CONSOLE - update_stats_config(config); -#endif /* def FEATURE_ACTIVITY_CONSOLE */ - - if (run_loader(csp)) - { - log_error(LOG_LEVEL_FATAL, "a loader failed - must exit"); - /* Never get here - LOG_LEVEL_FATAL causes program exit */ - } - -#ifdef FEATURE_ACL - if (block_acl(NULL,csp)) - { -#ifdef FEATURE_ACTIVITY_CONSOLE - accumulate_stats(STATS_ACL_RESTRICT,1); -#endif /* def FEATURE_ACTIVITY_CONSOLE */ - log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL"); - close_socket(csp->cfd); - freez(csp); - continue; - } -#endif /* def FEATURE_ACL */ - - /* add it to the list of clients */ - csp->next = clients->next; - clients->next = csp; - - if (config->multi_threaded) - { - int child_id; - -/* this is a switch () statment in the C preprocessor - ugh */ -#undef SELECTED_ONE_OPTION - -/* Use Pthreads in preference to native code */ -#if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION) -#define SELECTED_ONE_OPTION - { - pthread_t the_thread; - pthread_attr_t attrs; - - pthread_attr_init(&attrs); - pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED); - child_id = (pthread_create(&the_thread, &attrs, - (void*)serve, csp) ? -1 : 0); - pthread_attr_destroy(&attrs); - } -#endif - -#if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION) -#define SELECTED_ONE_OPTION - child_id = _beginthread( - (void (*)(void *))serve, - 64 * 1024, - csp); -#endif - -#if defined(__OS2__) && !defined(SELECTED_ONE_OPTION) -#define SELECTED_ONE_OPTION - child_id = _beginthread( - (void(* _Optlink)(void*))serve, - NULL, - 64 * 1024, - csp); -#endif - -#if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION) -#define SELECTED_ONE_OPTION - { - thread_id tid = spawn_thread - (server_thread, "server", B_NORMAL_PRIORITY, csp); - - if ((tid >= 0) && (resume_thread(tid) == B_OK)) - { - child_id = (int) tid; - } - else - { - child_id = -1; - } - } -#endif - -#if defined(AMIGA) && !defined(SELECTED_ONE_OPTION) -#define SELECTED_ONE_OPTION - csp->cfd = ReleaseSocket(csp->cfd, -1); - if((child_id = (int)CreateNewProcTags( - NP_Entry, (ULONG)server_thread, - NP_Output, Output(), - NP_CloseOutput, FALSE, - NP_Name, (ULONG)"privoxy child", - NP_StackSize, 200*1024, - TAG_DONE))) - { - childs++; - ((struct Task *)child_id)->tc_UserData = csp; - Signal((struct Task *)child_id, SIGF_SINGLE); - Wait(SIGF_SINGLE); - } -#endif - -#if !defined(SELECTED_ONE_OPTION) - child_id = fork(); - - /* This block is only needed when using fork(). - * When using threads, the server thread was - * created and run by the call to _beginthread(). - */ - if (child_id == 0) /* child */ - { - serve(csp); - _exit(0); - - } - else if (child_id > 0) /* parent */ - { - /* in a fork()'d environment, the parent's - * copy of the client socket and the CSP - * are not used. - */ - -#if !defined(_WIN32) && defined(__CYGWIN__) - wait( NULL ); -#endif /* !defined(_WIN32) && defined(__CYGWIN__) */ - close_socket(csp->cfd); - csp->flags &= ~CSP_FLAG_ACTIVE; - } -#endif - -#undef SELECTED_ONE_OPTION -/* end of cpp switch () */ - - if (child_id < 0) /* failed */ - { - char buf[BUFFER_SIZE]; - - log_error(LOG_LEVEL_ERROR, "can't fork: %E"); - - sprintf(buf , "Privoxy: can't fork: errno = %d", errno); - - write_socket(csp->cfd, buf, strlen(buf)); - close_socket(csp->cfd); - csp->flags &= ~CSP_FLAG_ACTIVE; - sleep(5); - continue; - } - } - else - { - serve(csp); - } - } - - /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */ - - /* Clean up. Aim: free all memory (no leaks) */ -#ifdef FEATURE_GRACEFUL_TERMINATION - - log_error(LOG_LEVEL_ERROR, "Graceful termination requested"); - - unload_current_config_file(); - unload_current_actions_file(); - unload_current_re_filterfile(); -#ifdef FEATURE_TRUST - unload_current_trust_file(); -#endif - - if (config->multi_threaded) - { - int i = 60; - do - { - sleep(1); - sweep(); - } while ((clients->next != NULL) && (--i > 0)); - - if (i <= 0) - { - log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait."); - } - } - sweep(); - sweep(); - -#if defined(unix) - free(basedir); -#endif -#if defined(_WIN32) && !defined(_WIN_CONSOLE) - /* Cleanup - remove taskbar icon etc. */ - TermLogWindow(); -#endif - - exit(0); -#endif /* FEATURE_GRACEFUL_TERMINATION */ - -} - -/********************************************************************* - * - * Function : relay_server_traffic - * - * Description : receive traffic from the server and relay it - * to the client, with some processing - * - * Parameters : - * 1 : client_state structure - * - * - * Returns : JB_ERR_OK if there may be more work - * : other values for errors - * - **********************************************************************/ - -static jb_err relay_server_traffic( struct client_state *csp ) -{ -#ifdef FEATURE_KILL_POPUPS - int block_popups; /* bool, 1==will block popups */ - int block_popups_now = 0; /* bool, 1==currently blocking popups */ -#endif /* def FEATURE_KILL_POPUPS */ - - char buf[BUFFER_SIZE]; - int len; /* for buffer sizes */ - int ms_iis5_hack = 0; - int byte_count = 0; - char *hdr; - char *p; - - /* Skeleton for HTTP response, if we should intercept the request */ - struct http_response *rsp; - - int pcrs_filter; /* bool, 1==will filter through pcrs */ - int gif_deanimate; /* bool, 1==will deanimate gifs */ - int jpeg_inspect; /* bool, 1==will inspect jpegs */ - -#ifdef FEATURE_KILL_POPUPS - block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0); -#endif /* def FEATURE_KILL_POPUPS */ - - pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */ - (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER])); - - gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0); - - jpeg_inspect = ((csp->action->flags & ACTION_JPEG_INSPECT) != 0); - - fflush (0); - len = read_socket (csp->sfd, buf, sizeof (buf) - 1); - - if (len < 0) - { - log_error (LOG_LEVEL_ERROR, "read from: %s failed: %E", csp->http->host); - - log_error (LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0", - csp->ip_addr_str, csp->http->ocmd); - - rsp = error_response (csp, "connect-failed", errno); - - if (rsp) - { - if (write_socket (csp->cfd, rsp->head, rsp->head_length) - || write_socket (csp->cfd, rsp->body, rsp->content_length)) - { - log_error (LOG_LEVEL_ERROR, "write to: %s failed: %E", - csp->http->host); - } - } - - free_http_response (rsp); - return JB_ERR_GENERIC; - } - - /* Add a trailing zero. This lets filter_popups - * use string operations. - */ - buf[len] = '\0'; - -#ifdef FEATURE_KILL_POPUPS - /* Filter the popups on this read. */ - if (block_popups_now) - { - filter_popups (buf, csp); - } -#endif /* def FEATURE_KILL_POPUPS */ - - - /* Normally, this would indicate that we've read - * as much as the server has sent us and we can - * close the client connection. However, Microsoft - * in its wisdom has released IIS/5 with a bug that - * prevents it from sending the trailing \r\n in - * a 302 redirect header (and possibly other headers). - * To work around this if we've haven't parsed - * a full header we'll append a trailing \r\n - * and see if this now generates a valid one. - * - * This hack shouldn't have any impacts. If we've - * already transmitted the header or if this is a - * SSL connection, then we won't bother with this - * hack. So we only work on partially received - * headers. If we append a \r\n and this still - * doesn't generate a valid header, then we won't - * transmit anything to the client. - */ - if (len == 0) - { - - if (csp->all_headers_read || csp->http->ssl) - { - /* - * If we have been buffering up the document, - * now is the time to apply content modification - * and send the result to the client. - */ - if (csp->content_filter) - { - /* - * If the content filter fails, use the original - * buffer and length. - * (see p != NULL ? p : csp->iob->cur below) - */ - if (NULL == (p = (*csp->content_filter) (csp))) - { - csp->content_length = csp->iob->eod - csp->iob->cur; - } - - hdr = sed (server_patterns, add_server_headers, csp); - if (hdr == NULL) - { - /* FIXME Should handle error properly */ - log_error (LOG_LEVEL_FATAL, - "Out of memory parsing server header"); - - } - - if (write_socket (csp->cfd, hdr, strlen (hdr)) - || write_socket (csp->cfd, p != NULL ? p : csp->iob->cur, - csp->content_length)) - { - log_error (LOG_LEVEL_ERROR, - "write modified content to client failed: %E"); - return JB_ERR_GENERIC; - } - - freez (hdr); - if (NULL != p) - { - freez (p); - } - } - log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d", - csp->ip_addr_str, csp->http->ocmd, byte_count); - return JB_ERR_GENERIC; - } - - /* - * This is NOT the body, so - * Let's pretend the server just sent us a blank line. - */ - len = sprintf (buf, "\r\n"); - - /* - * Now, let the normal header parsing algorithm below do its - * job. If it fails, we'll exit instead of continuing. - */ - - ms_iis5_hack = 1; - } - - /* - * If this is an SSL connection or we're in the body - * of the server document, just write it to the client, - * unless we need to buffer the body for later content-filtering - */ - - if (csp->all_headers_read || csp->http->ssl) - { - if (csp->content_filter) - { - add_to_iob (csp, buf, len); - - /* - * If the buffer limit will be reached on the next read, - * switch to non-filtering mode, i.e. make & write the - * header, flush the socket and get out of the way. - */ - if (((size_t) (csp->iob->eod - csp->iob->buf)) + - (size_t) BUFFER_SIZE > csp->config->buffer_limit) - { - size_t hdrlen; - - log_error (LOG_LEVEL_ERROR, - "Buffer size limit reached! Flushing and stepping back."); - - hdr = sed (server_patterns, add_server_headers, csp); - if (hdr == NULL) - { - /* FIXME Should handle error properly */ - log_error (LOG_LEVEL_FATAL, - "Out of memory parsing server header"); - } - - hdrlen = strlen (hdr); - byte_count += hdrlen; - - if (write_socket (csp->cfd, hdr, hdrlen) - || ((len = flush_socket (csp->cfd, csp)) < 0)) - { - log_error (LOG_LEVEL_CONNECT, - "write header to client failed: %E"); - - freez (hdr); - return JB_ERR_GENERIC; - } - - freez (hdr); - byte_count += len; - - csp->content_filter = NULL; - csp->all_headers_read = 1; - - } - } - else - { - if (write_socket (csp->cfd, buf, (size_t) len)) - { - log_error (LOG_LEVEL_ERROR, "write to client failed: %E"); - return JB_ERR_GENERIC; - } - } - byte_count += len; - return JB_ERR_OK ; - } - else - { - /* - * we're still looking for the end of the - * server's header ... (does that make header - * parsing an "out of body experience" ? - */ - - /* buffer up the data we just read */ - add_to_iob (csp, buf, len); - - /* get header lines from the iob */ - - while ((p = get_header (csp)) != NULL) - { - if (*p == '\0') - { - /* see following note */ - log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d", - csp->ip_addr_str, csp->http->ocmd, byte_count); - return JB_ERR_GENERIC; - } - enlist (csp->headers, p); - freez (p); - } - - /* NOTE: there are no "empty" headers so - * if the pointer `p' is not NULL we must - * assume that we reached the end of the - * buffer before we hit the end of the header. - */ - - if (p) - { - if (ms_iis5_hack) - { - /* Well, we tried our MS IIS/5 - * hack and it didn't work. - * The header is incomplete - * and there isn't anything - * we can do about it. - */ - log_error(LOG_LEVEL_CLF, "Incomplete Server Header: %s - - [%T] \"%s\" 200 %d", - csp->ip_addr_str, csp->http->ocmd, byte_count); - return JB_ERR_GENERIC; - } - else - { - /* Since we have to wait for - * more from the server before - * we can parse the headers - * we just continue here. - */ - return JB_ERR_OK; - } - } - - /* we have now received the entire header. - * filter it and send the result to the client - */ - - hdr = sed (server_patterns, add_server_headers, csp); - if (hdr == NULL) - { - /* FIXME Should handle error properly */ - log_error (LOG_LEVEL_FATAL, "Out of memory parsing server header"); - } - - - -#ifdef FEATURE_KILL_POPUPS - /* Start blocking popups if appropriate. */ - - if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */ - !csp->http->ssl && /* We talk plaintext */ - block_popups) /* Policy allows */ - { - block_popups_now = 1; - /* - * Filter the part of the body that came in the same read - * as the last headers: - */ - filter_popups (csp->iob->cur, csp); - } - -#endif /* def FEATURE_KILL_POPUPS */ - - /* Buffer and pcrs filter this if appropriate. */ - - if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */ - !csp->http->ssl && /* We talk plaintext */ - pcrs_filter) /* Policy allows */ - { - csp->content_filter = pcrs_filter_response; - } - - /* Buffer and gif_deanimate this if appropriate. */ - - if ((csp->content_type & CT_GIF) && /* It's a image/gif MIME-Type */ - !csp->http->ssl && /* We talk plaintext */ - gif_deanimate) /* Policy allows */ - { - csp->content_filter = gif_deanimate_response; - } - - /* Buffer and jpg_inspect this if appropriate. */ - - if ((csp->content_type & CT_JPEG) && /* It's an image/jpeg MIME-Type */ - !csp->http->ssl && /* We talk plaintext */ - jpeg_inspect) /* Policy allows */ - { - csp->content_filter = jpeg_inspect_response; - } - - /* - * Only write if we're not buffering for content modification - */ - if (!csp->content_filter) - { - /* write the server's (modified) header to - * the client (along with anything else that - * may be in the buffer) - */ - if (write_socket (csp->cfd, hdr, strlen (hdr)) - || ((len = flush_socket (csp->cfd, csp)) < 0)) - { - log_error (LOG_LEVEL_CONNECT, - "write header to client failed: %E"); - - /* the write failed, so don't bother - * mentioning it to the client... - * it probably can't hear us anyway. - */ - freez (hdr); - return JB_ERR_GENERIC; - } - - byte_count += len; - } - - /* we're finished with the server's header */ - - freez (hdr); - csp->all_headers_read = 1; - - /* If this was a MS IIS/5 hack then it means - * the server has already closed the - * connection. Nothing more to read. Time - * to bail. - */ - if (ms_iis5_hack) - { - return JB_ERR_GENERIC ; - } - } - return JB_ERR_OK ; -} /* END relay_server_traffic() */ - - -/********************************************************************* - * - * Function : read_client_headers - * - * Description : read all the client headers, and fill in the - * http* structure - * - * Parameters : - * 1 : client_state structure - * 2 : http_request structure - * - * - * Returns : JB_ERR_OK - headers read and parsed ok - * : other values - an error occurred. - *********************************************************************/ - -static jb_err read_client_headers( struct client_state *csp, struct http_request *http ) -{ - - char *p; - char *req; - char buf[BUFFER_SIZE]; - int len; /* for buffer sizes */ - - /* - * Read the client's request. Note that since we're not using select() we - * could get blocked here if a client connected, then didn't say anything! - * - * This will read all the client headers. - */ - - req = NULL ; - for (;;) - { - len = read_socket(csp->cfd, buf, sizeof(buf)); - - if (len <= 0) break; /* error! */ - - add_to_iob(csp, buf, len); - - req = get_header(csp); - - if (req == NULL) - { - break; /* no HTTP request! */ - } - - if (*req == '\0') - { - continue; /* more to come! */ - } - - /* When we get here we have read one header which is enough */ - /* to check whether the connection is allowed */ - break; - } - - - for(;;) - { - - if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) ) - { - len = read_socket(csp->cfd, buf, sizeof(buf)); - if (len <= 0) - { - log_error(LOG_LEVEL_ERROR, "read from client failed: %E"); - return JB_ERR_GENERIC; - } - add_to_iob(csp, buf, len); - continue; - } - - if (p == NULL) break; - - enlist(csp->headers, p); - freez(p); - - } - - parse_http_request(req, http, csp); - freez(req); - - if (http->cmd == NULL) - { - strcpy(buf, CHEADER); - write_socket(csp->cfd, buf, strlen(buf)); - - log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str); - - return JB_ERR_GENERIC; - } - - return JB_ERR_OK ; - - -} /* END read_client_headers */ - - -/********************************************************************* - * - * Function : process_client_headers - * - * Description : Process client headers - * FIXME: Add description of what we do here! - * - * Parameters : - * 1 : client_state structure - * 2 : http_request structure - * - * - * Returns : JB_ERR_OK - headers processed ok - * : other values - an error occurred. - *********************************************************************/ - -static jb_err process_client_headers( struct client_state *csp, struct http_request *http ) -{ - - -#ifdef FEATURE_FORCE_LOAD - /* If this request contains the FORCE_PREFIX, - * better get rid of it now and set the force flag --oes - * Changed to use the http structure rather than the req field --jaa - * FIXME: This isn't enough -- there is the path and referrer etc! * - */ - - if (strstr(http->url, FORCE_PREFIX)) - { - strclean(http->url, FORCE_PREFIX); - strclean(http->path, FORCE_PREFIX); - log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", http->url); - csp->flags |= CSP_FLAG_FORCED; - } - -#endif /* def FEATURE_FORCE_LOAD */ - - - /* decide how to route the HTTP request */ - - if ((http->fwd = forward_url(http, csp)) == NULL) - { - log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!"); - /* Never get here - LOG_LEVEL_FATAL causes program exit */ - } - - /* build the http request to send to the server - * we have to do one of the following: - * - * create = use the original HTTP request to create a new - * HTTP request that has either the path component - * without the http://domainspec (w/path) or the - * full orininal URL (w/url) - * Note that the path and/or the HTTP version may - * have been altered by now. - * - * connect = Open a socket to the host:port of the server - * and short-circuit server and client socket. - * - * pass = Pass the request unchanged if forwarding a CONNECT - * request to a parent proxy. Note that we'll be sending - * the CFAIL message ourselves if connecting to the parent - * fails, but we won't send a CSUCCEED message if it works, - * since that would result in a double message (ours and the - * parent's). After sending the request to the parent, we simply - * tunnel. - * - * here's the matrix: - * SSL - * 0 1 - * +--------+--------+ - * | | | - * 0 | create | connect| - * | w/path | | - * Forwarding +--------+--------+ - * | | | - * 1 | create | pass | - * | w/url | | - * +--------+--------+ - * - */ - - /* - * Determine the actions for this URL - */ -#ifdef FEATURE_TOGGLE - if (!(csp->flags & CSP_FLAG_TOGGLED_ON)) - { - /* Most compatible set of actions (i.e. none) */ - init_current_action(csp->action); - } - else -#endif /* ndef FEATURE_TOGGLE */ - { - url_actions(http, csp); - } - - - - - - /* - * Downgrade http version from 1.1 to 1.0 if +downgrade - * action applies - */ - if ( (http->ssl == 0) - && (!strcmpic(http->ver, "HTTP/1.1")) - && (csp->action->flags & ACTION_DOWNGRADE)) - { - freez(http->ver); - http->ver = strdup("HTTP/1.0"); - - if (http->ver == NULL) - { - log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version"); - } - } - - /* - * Save a copy of the original request for logging - */ - http->ocmd = strdup(http->cmd); - - if (http->ocmd == NULL) - { - log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line"); - } - - /* - * (Re)build the HTTP request for non-SSL requests. - * If forwarding, use the whole URL, else, use only the path. - */ - if (http->ssl == 0) - { - freez(http->cmd); - - http->cmd = strdup(http->gpc); - string_append(&http->cmd, " "); - - if (http->fwd->forward_host) - { - string_append(&http->cmd, http->url); - } - else - { - string_append(&http->cmd, http->path); - } - - string_append(&http->cmd, " "); - string_append(&http->cmd, http->ver); - - if (http->cmd == NULL) - { - log_error(LOG_LEVEL_FATAL, "Out of memory rewiting SSL command"); - } - } - enlist_first(csp->headers, http->cmd); - - - /* - * If the user has not supplied any wafers, and the user has not - * told us to suppress the vanilla wafer, then send the vanilla wafer. - */ - if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER]) - && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0)) - { - enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER); - } - - return JB_ERR_OK ; -} /* process_client_headers */ - -/********************************************************************* - * - * Function : intercept_page - * - * Description : Check whether to intercept page - * - * Parameters : - * 1 : client_state structure - * 2 : http_request structure - * - * - * Returns : JB_ERR_OK - Do NOT intercept this page - * : JB_ERR_INTERCEPT - intercept this page - * : all other values - an error occurred. - *********************************************************************/ -static jb_err intercept_page( struct client_state *csp, struct http_request *http ) -{ - - /* Skeleton for HTTP response, if we should intercept the request */ - struct http_response *rsp; - - -/* - * These next lines are a little ugly, but they simplifies the if statements - * below. Basically if TOGGLE, then we want the if to test if the - * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD, - * then we want the if to test for CSP_FLAG_FORCED , else we don't - */ -#ifdef FEATURE_TOGGLE -# define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) && -#else /* ifndef FEATURE_TOGGLE */ -# define IS_TOGGLED_ON_AND -#endif /* ndef FEATURE_TOGGLE */ -#ifdef FEATURE_FORCE_LOAD -# define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) && -#else /* ifndef FEATURE_FORCE_LOAD */ -# define IS_NOT_FORCED_AND -#endif /* def FEATURE_FORCE_LOAD */ - -#define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND - - if ( - /* a CGI call was detected and answered */ - (NULL != (rsp = dispatch_cgi(csp))) - - /* or we are enabled and... */ - || (IS_ENABLED_AND ( - - /* ..the request was blocked */ - ( NULL != (rsp = block_url(csp))) - - /* ..or untrusted */ -#ifdef FEATURE_TRUST - || ( NULL != (rsp = trust_url(csp))) -#endif /* def FEATURE_TRUST */ - - /* ..or a fast redirect kicked in */ -#ifdef FEATURE_FAST_REDIRECTS - || (((csp->action->flags & ACTION_FAST_REDIRECTS) != 0) && - (NULL != (rsp = redirect_url(csp)))) -#endif /* def FEATURE_FAST_REDIRECTS */ - )) - ) - { - /* Write the answer to the client */ - if (write_socket(csp->cfd, rsp->head, rsp->head_length) - || write_socket(csp->cfd, rsp->body, rsp->content_length)) - { - log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host); - } - -#ifdef FEATURE_STATISTICS - /* Count as a rejected request */ - csp->flags |= CSP_FLAG_REJECTED; -#endif /* def FEATURE_STATISTICS */ - - /* Log (FIXME: All intercept reasons apprear as "crunch" with Status 200) */ - log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path); - log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd); - - /* Clean up and return */ - free_http_response(rsp); - return JB_ERR_INTERCEPT; - } - - /* When we get here the request doesn't need to be intercepted */ - return JB_ERR_OK ; -} - -/********************************************************************* - * - * Function : open_forwarding_connection - * - * Description : Check whether to intercept page - * - * Parameters : - * 1 : client_state structure - * 2 : http_request structure - * - * Returns : JB_ERR_OK - Connection opened ok - * : all other values - an error occurred. - *********************************************************************/ -static jb_err open_forwarding_connection(struct client_state *csp ) -{ - struct http_response *rsp; - -#ifdef FEATURE_ACTIVITY_CONSOLE - accumulate_stats(STATS_REQUEST, 1); -#endif /* def FEATURE_ACTIVITY_CONSOLE */ - log_error(LOG_LEVEL_GPC, "%s%s", csp->http->hostport, csp->http->path); - - if (csp->http->fwd->forward_host) - { - log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s", - csp->http->fwd->forward_host, csp->http->fwd->forward_port, - csp->http->hostport); - } - else - { - log_error(LOG_LEVEL_CONNECT, "to %s", csp->http->hostport); - } - - /* here we connect to the server, gateway, or the forwarder */ - - csp->sfd = forwarded_connect(csp->http->fwd, csp->http, csp); - - if (csp->sfd == JB_INVALID_SOCKET) - { - log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E", - csp->http->hostport); - - if (errno == EINVAL) - { - rsp = error_response(csp, "no-such-domain", errno); - - log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0", - csp->ip_addr_str, csp->http->ocmd); - } - else - { - rsp = error_response(csp, "connect-failed", errno); - - log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0", - csp->ip_addr_str, csp->http->ocmd); - } - - - /* Write the answer to the client */ - if(rsp) - { - if (write_socket(csp->cfd, rsp->head, rsp->head_length) - || write_socket(csp->cfd, rsp->body, rsp->content_length)) - { - log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host); - } - } - - free_http_response(rsp); - return JB_ERR_GENERIC; - } - - log_error(LOG_LEVEL_CONNECT, "OK"); - return JB_ERR_OK ; - -} /* END open_forwarding_connection() */ - - -/********************************************************************* - * - * Function : send_client_headers_to_server - * - * Description : send the client headers (possibly modified) to the server - * - * Parameters : - * 1 : client_state structure - * 2 : http_request structure - * - * - * Returns : JB_ERR_OK - headers sent ok - * : other values - an error occurred. - *********************************************************************/ - -static jb_err send_client_headers_to_server( struct client_state *csp, struct http_request *http, char *hdr ) -{ - - struct http_response *rsp; - - if (http->fwd->forward_host || (http->ssl == 0)) - { - /* write the client's (modified) header to the server - * (along with anything else that may be in the buffer) - */ - - if (write_socket(csp->sfd, hdr, strlen(hdr)) - || (flush_socket(csp->sfd, csp) < 0)) - { - log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E", - http->hostport); - - log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0", - csp->ip_addr_str, http->ocmd); - - rsp = error_response(csp, "connect-failed", errno); - - if(rsp) - { - if (write_socket(csp->cfd, rsp->head, rsp->head_length) - || write_socket(csp->cfd, rsp->body, rsp->content_length)) - { - log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host); - } - } - - free_http_response(rsp); - return JB_ERR_GENERIC; - } - } - else - { - /* - * We're running an SSL tunnel and we're not forwarding, - * so just send the "connect succeeded" message to the - * client, flush the rest, and get out of the way. - */ - log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n", - csp->ip_addr_str, http->ocmd); - - if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1)) - { - return JB_ERR_OK; - } - IOB_RESET(csp); - } - - return JB_ERR_OK ; -} /* END send_client_headers_to_server */ - - -/********************************************************************* - * - * Function : is_connect_request_allowed - * - * Description : send the client headers (possibly modified) to the server - * - * Parameters : - * 1 : client_state structure - * - * - * - * Returns : JB_ERR_OK - connect request allowed - * : other values - connect request not allowed - *********************************************************************/ -static jb_err is_connect_request_allowed( struct client_state *csp ) -{ - /* - * Check if a CONNECT request is allowable: - * In the absence of a +limit-connect action, allow only port 443. - * If there is an action, allow whatever matches the specificaton. - */ - - if(csp->http->ssl) - { - if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443) - || (csp->action->flags & ACTION_LIMIT_CONNECT - && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) ) - { - char buf[BUFFER_SIZE]; - strcpy(buf, CFORBIDDEN); - write_socket(csp->cfd, buf, strlen(buf)); - - log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str); - log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str); - - return JB_ERR_GENERIC; - } - } - - return JB_ERR_OK ; -} /* END is_connect_request_allowed */ - -/* - Local Variables: - tab-width: 3 - end: -*/