+++ /dev/null
-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
- *
- *
- *********************************************************************/
-\f
-
-#include "config.h"
-
-#include <stdio.h>
-#include <sys/types.h>
-#include <stdlib.h>
-#include <string.h>
-#include <signal.h>
-#include <fcntl.h>
-#include <errno.h>
-
-#ifdef FEATURE_PTHREAD
-#include <pthread.h>
-#endif /* def FEATURE_PTHREAD */
-
-#ifdef _WIN32
-# ifndef FEATURE_PTHREAD
-# ifndef STRICT
-# define STRICT
-# endif
-# include <windows.h>
-# include <process.h>
-# endif /* ndef FEATURE_PTHREAD */
-
-# include "win32.h"
-# ifndef _WIN_CONSOLE
-# include "w32log.h"
-# endif /* ndef _WIN_CONSOLE */
-
-#else /* ifndef _WIN32 */
-
-# if !defined (__OS2__)
-# include <unistd.h>
-# include <sys/wait.h>
-# endif /* ndef __OS2__ */
-# include <sys/time.h>
-# include <sys/stat.h>
-# include <sys/ioctl.h>
-
-#ifdef sun
-#include <sys/termios.h>
-#endif /* sun */
-
-#ifdef unix
-#include <pwd.h>
-#include <grp.h>
-#endif
-
-# include <signal.h>
-
-# ifdef __BEOS__
-# include <socket.h> /* BeOS has select() for sockets only. */
-# include <OS.h> /* declarations for threads and stuff. */
-# endif
-
-# if defined(__EMX__) || defined(__OS2__)
-# include <sys/select.h> /* OS/2/EMX needs a little help with select */
-# endif
-# ifdef __OS2__
-#define INCL_DOS
-# include <os2.h>
-#define bzero(B,N) memset(B,0x00,n)
-# endif
-
-# ifndef FD_ZERO
-# include <select.h>
-# 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:
-*/
projects / privoxy.git / blobdiff