1 const char jcc_rcs[] = "$Id: jcc.c,v 1.130 2007/04/19 13:47:34 fabiankeil Exp $";
2 /*********************************************************************
4 * File : $Source: /cvsroot/ijbswa/current/jcc.c,v $
6 * Purpose : Main file. Contains main() method, main loop, and
7 * the main connection-handling function.
9 * Copyright : Written by and Copyright (C) 2001-2007 the SourceForge
10 * Privoxy team. http://www.privoxy.org/
12 * Based on the Internet Junkbuster originally written
13 * by and Copyright (C) 1997 Anonymous Coders and
14 * Junkbusters Corporation. http://www.junkbusters.com
16 * This program is free software; you can redistribute it
17 * and/or modify it under the terms of the GNU General
18 * Public License as published by the Free Software
19 * Foundation; either version 2 of the License, or (at
20 * your option) any later version.
22 * This program is distributed in the hope that it will
23 * be useful, but WITHOUT ANY WARRANTY; without even the
24 * implied warranty of MERCHANTABILITY or FITNESS FOR A
25 * PARTICULAR PURPOSE. See the GNU General Public
26 * License for more details.
28 * The GNU General Public License should be included with
29 * this file. If not, you can view it at
30 * http://www.gnu.org/copyleft/gpl.html
31 * or write to the Free Software Foundation, Inc., 59
32 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
36 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
37 * Move crunching and request line rebuilding out of chat().
39 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
40 * Introduce tags as alternative way to specify which
41 * actions apply to a request. At the moment tags can be
42 * created based on client and server headers.
44 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
45 * Don't CLF-log CONNECT requests twice.
47 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
48 * Log the source address for ACL-related connection drops.
50 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
51 * New config option: enforce-blocks.
53 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
54 * - Move null byte check into separate function.
55 * - Don't confuse the client with error pages
56 * if a CONNECT request was already confirmed.
58 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
59 * Speed up NULL byte escaping and only log the complete
60 * NULL byte requests with header debugging enabled.
62 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
63 * Answer requests that contain NULL bytes with
64 * a custom response instead of waiting for more
65 * data until the client eventually hangs up.
67 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
68 * - Move delivery and logging of crunched responses
69 * from chat() into send_crunch_response().
70 * - Display the reason for generating http_responses.
71 * - Log the content length for LOG_LEVEL_CLF correctly
72 * (still incorrect for some fixed responses).
73 * - Reword an incorrect comment about
74 * treat-forbidden-connects-like-blocks violating
76 * - Add some log messages.
78 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
79 * Move mutex initialization into separate
80 * function and exit in case of errors.
82 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
83 * - Start to reduce chat()'s line count and move
84 * parts of it into separate functions.
85 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
87 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
88 * - Add Proxy-Agent header to HTTP snippets that are
89 * supposed to reach HTTP clients only.
90 * - Made a few CONNECT log messages more descriptive.
91 * - Catch completely empty server responses (as seen
92 * with Tor's fake ".noconnect" top level domain).
93 * - Use shiny new "forwarding-failed" template for socks errors.
95 * Revision 1.118 2007/01/07 07:43:43 joergs
96 * AmigaOS4 support added.
98 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
99 * Added config option accept-intercepted-requests
100 * and disabled it by default.
102 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
103 * Reverted parts of my last commit
104 * to keep error handling working.
106 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
107 * Fixed gcc43 conversion warnings.
109 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
110 * Fix -pedantic ISO C warning about converting
111 * from function pointer to object pointer.
113 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
114 * Silence compiler warning I introduced with my last commit.
116 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
117 * Mutex protect rand() if POSIX threading
118 * is used, warn the user if that's not possible
119 * and stop using it on _WIN32 where it could
122 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
123 * Don't prevent core dumps by catching SIGABRT.
124 * It's rude and makes debugging unreasonable painful.
126 * Revision 1.110 2006/12/13 14:52:53 etresoft
127 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
129 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
130 * Privoxy is now able to run as intercepting
131 * proxy in combination with any packet filter
132 * that does the port redirection. The destination
133 * is extracted from the "Host:" header which
134 * should be available for nearly all requests.
136 * Moved HTTP snipplets into jcc.c.
137 * Added error message for gopher proxy requests.
139 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
140 * Only unlink the pidfile if it's actually used.
142 * Change order of interception checks to make
143 * it possible to block or redirect requests for
146 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
147 * Make pthread mutex locking more generic. Instead of
148 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
149 * and use mutex locking unless there is an _r function
150 * available. Better safe than sorry.
152 * Fixes "./configure --disable-pthread" and should result
153 * in less threading-related problems on pthread-using platforms,
154 * but it still doesn't fix BR#1122404.
156 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
157 * Move pthread.h inclusion from jcc.c to jcc.h.
158 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
160 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
161 * Don't exit after receiving the second SIGHUP on Solaris.
163 * Fixes BR 1052235, but the same problem may exist on other
164 * systems. Once 3.0.6 is out we should use sigset()
165 * where available and see if it breaks anything.
167 * Revision 1.104 2006/09/23 13:26:38 roro
168 * Replace TABs by spaces in source code.
170 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
171 * Fix +redirect{}. Didn't work with -fast-redirects.
173 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
174 * Respond with 400 and a short text message
175 * if the client tries to use Privoxy as FTP proxy.
177 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
178 * Make number of retries in case of forwarded-connect problems
179 * a config file option (forwarded-connect-retries) and use 0 as
182 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
183 * Set random(3) seed.
185 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
186 * Follow the OpenBSD port's lead and protect the resolve
187 * functions on OpenBSD as well.
189 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
190 * --user fix. Only use the user as group if no group is specified.
191 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
193 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
194 * Windows service (re-)integration
198 * --install[:service_name]
199 * --uninstall[:service_name]
202 * They work as follows:
203 * --install will create a service for you and then terminate.
204 * By default the service name will be "privoxy" (without the quotes).
205 * However you can run multiple services if you wish, just by adding
206 * a colon and then a name (no spaces).
208 * --uninstall follows the exact same rules a --install.
210 * --service is used when the program is executed by the service
211 * control manager, and in normal circumstances would never be
212 * used as a command line argument.
214 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
215 * Windows service integration
217 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
218 * Incorporate Fabian Keil's patch work:
219 http://www.fabiankeil.de/sourcecode/privoxy/
221 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
222 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
223 * with what was really the latest development (the v_3_0_branch branch)
225 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
226 * Thanks to Jindrich Makovicka for a race condition fix for the log
227 * file. The race condition remains for non-pthread implementations.
228 * Reference patch #1175720.
230 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
231 * Add the ability to check jpeg images for invalid
232 * lengths of comment blocks. Defensive strategy
233 * against the exploit:
234 * Microsoft Security Bulletin MS04-028
235 * Buffer Overrun in JPEG Processing (GDI+) Could
236 * Allow Code Execution (833987)
237 * Enabled with +inspect-jpegs in actions files.
239 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
240 * - Fixed usage info for non-unix platforms
241 * - Fixed small cmdline parsing bug
243 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
244 * Diagnostics: Now preserve the returncode of pthread_create
245 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
247 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
248 * No longer ignore SIGCHLD. Fixes bug #769381
250 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
251 * Close jarfile on graceful exit, remove stray line
253 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
254 * Cosmetics: Killed a warning, a typo and an allocation left at exit
256 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
257 * No longer rely on non-POSIX.1 extensions of getcwd().
260 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
261 * Replaced setenv() by posix-compliant putenv()
262 * Thanks to Neil McCalden (nmcc AT users.sf.net).
264 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
265 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
267 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
268 * Clean-up and extension of improvements for forked mode:
269 * - Child's return code now consists of flags RC_FLAG_*
270 * - Reporting toggle to parent now properly #ifdef'ed
271 * - Children now report blocking to parent. This enables
272 * statistics in forked mode
274 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
275 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
276 * Children now report having been toggled through _exit(17), parents
277 * watch for that code and toggle themselves if found.
279 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
280 * Wrapping all *_r functions (the non-_r versions of them) with
281 * mutex semaphores for OSX. Hopefully this will take care of all
282 * of those pesky crash reports.
284 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
285 * Fixed two mostly harmless mem leaks
287 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
288 * Fix: Head of global clients list now initialized to NULL
290 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
291 * Added basic support for OPTIONS and TRACE HTTP methods:
292 * - New interceptor direct_response() added in chat().
293 * - sed() moved to earlier in the process, so that the
294 * Host: header is evaluated before actions and forwarding
297 * Revision 1.92 2002/05/08 16:00:46 oes
298 * Chat's buffer handling:
299 * - Fixed bug with unchecked out-of-mem conditions
300 * while reading client request & server headers
301 * - No longer predict if the buffer limit will be exceeded
302 * in the next read -- check add_to_iob's new
303 * return code. If buffer couldn't be extended
304 * (policy or out-of-mem) while
305 * - reading from client: abort
306 * - reading server headers: send error page
307 * - buffering server body for filter: flush,
308 * and if that fails: send error page
310 * Revision 1.91 2002/04/08 20:35:58 swa
313 * Revision 1.90 2002/04/02 14:57:28 oes
314 * Made sending wafers independent of FEATURE_COOKIE_JAR
316 * Revision 1.89 2002/03/31 17:18:59 jongfoster
317 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
319 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
320 * More compiler warning message maintenance
322 * Revision 1.87 2002/03/26 22:29:54 swa
323 * we have a new homepage!
325 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
326 * Workaround for closing the jarfile before load_config() comes around again
328 * Revision 1.85 2002/03/24 15:23:33 jongfoster
331 * Revision 1.84 2002/03/24 13:25:43 swa
332 * name change related issues
334 * Revision 1.83 2002/03/16 23:54:06 jongfoster
335 * Adding graceful termination feature, to help look for memory leaks.
336 * If you enable this (which, by design, has to be done by hand
337 * editing config.h) and then go to http://i.j.b/die, then the program
338 * will exit cleanly after the *next* request. It should free all the
339 * memory that was used.
341 * Revision 1.82 2002/03/13 00:27:05 jongfoster
344 * Revision 1.81 2002/03/12 01:42:50 oes
345 * Introduced modular filters
347 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
348 * OS/2 port maintenance:
349 * - Fixed EMX build - it had decayed a little
350 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
351 * substituted a memset for now.
353 * Revision 1.79 2002/03/09 20:03:52 jongfoster
354 * - Making various functions return int rather than size_t.
355 * (Undoing a recent change). Since size_t is unsigned on
356 * Windows, functions like read_socket that return -1 on
357 * error cannot return a size_t.
359 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
360 * crashes, and also frequently caused JB to jump to 100%
361 * CPU and stay there. (Because it thought it had just
362 * read ((unsigned)-1) == 4Gb of data...)
364 * - The signature of write_socket has changed, it now simply
365 * returns success=0/failure=nonzero.
367 * - Trying to get rid of a few warnings --with-debug on
368 * Windows, I've introduced a new type "jb_socket". This is
369 * used for the socket file descriptors. On Windows, this
370 * is SOCKET (a typedef for unsigned). Everywhere else, it's
371 * an int. The error value can't be -1 any more, so it's
372 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
373 * Windows it maps to the #define INVALID_SOCKET.)
375 * - The signature of bind_port has changed.
377 * Revision 1.78 2002/03/08 21:35:04 oes
378 * Added optional group supplement to --user option. Will now use default group of user if no group given
380 * Revision 1.77 2002/03/07 03:52:06 oes
381 * - Fixed compiler warnings etc
382 * - Improved handling of failed DNS lookups
384 * Revision 1.76 2002/03/06 22:54:35 jongfoster
385 * Automated function-comment nitpicking.
387 * Revision 1.75 2002/03/06 10:02:19 oes
388 * Fixed stupid bug when --user was not given
390 * Revision 1.74 2002/03/06 00:49:31 jongfoster
391 * Fixing warning on Windows
392 * Making #ifdefs that refer to the same variable consistently
393 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
395 * Revision 1.73 2002/03/05 23:57:30 hal9
396 * Stray character 's' on line 1618 was breaking build.
398 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
399 * - Re-enable OS/2 building after new parms were added
400 * - Fix false out of memory report when resolving CGI templates when no IP
401 * address is available of failed attempt (a la no such domain)
403 * Revision 1.71 2002/03/05 18:13:56 oes
404 * Added --user option
406 * Revision 1.70 2002/03/05 04:52:42 oes
407 * Deleted non-errlog debugging code
409 * Revision 1.69 2002/03/04 23:50:00 jongfoster
410 * Splitting off bind_port() call into bind_port_helper(), with
413 * Revision 1.68 2002/03/04 20:17:32 oes
416 * Revision 1.67 2002/03/04 18:18:57 oes
417 * - Removed _DEBUG mode
418 * - Cleand up cmdline parsing
419 * - Introduced --no-daemon, --pidfile options
420 * - Cleaned up signal handling:
421 * - Terminate cleanly on INT, TERM and ABRT
422 * - Schedule logfile for re-opening on HUP
423 * - Ignore CHLD and PIPE
424 * - Leave the rest with their default handlers
425 * - Uniform handler registration
426 * - Added usage() function
427 * - Played styleguide police
429 * Revision 1.66 2002/03/03 15:06:55 oes
430 * Re-enabled automatic config reloading
432 * Revision 1.65 2002/03/03 14:49:11 oes
433 * Fixed CLF logging: Now uses client's original HTTP request
435 * Revision 1.64 2002/03/03 09:18:03 joergs
436 * Made jumbjuster work on AmigaOS again.
438 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
439 * Clean up a little CRLF unpleasantness that suddenly appeared
441 * Revision 1.62 2002/02/20 23:17:23 jongfoster
442 * Detecting some out-of memory conditions and exiting with a log message.
444 * Revision 1.61 2002/01/17 21:01:52 jongfoster
445 * Moving all our URL and URL pattern parsing code to urlmatch.c.
447 * Revision 1.60 2001/12/30 14:07:32 steudten
448 * - Add signal handling (unix)
449 * - Add SIGHUP handler (unix)
450 * - Add creation of pidfile (unix)
451 * - Add action 'top' in rc file (RH)
452 * - Add entry 'SIGNALS' to manpage
453 * - Add exit message to logfile (unix)
455 * Revision 1.59 2001/12/13 14:07:18 oes
456 * Fixed Bug: 503 error page now sent OK
458 * Revision 1.58 2001/11/30 23:37:24 jongfoster
459 * Renaming the Win32 config file to config.txt - this is almost the
460 * same as the corresponding UNIX name "config"
462 * Revision 1.57 2001/11/16 00:47:43 jongfoster
463 * Changing the tty-disconnection code to use setsid().
465 * Revision 1.56 2001/11/13 20:20:54 jongfoster
466 * Tabs->spaces, fixing a bug with missing {} around an if()
468 * Revision 1.55 2001/11/13 20:14:53 jongfoster
469 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
471 * Revision 1.54 2001/11/07 00:03:14 steudten
472 * Give reliable return value if an error
473 * occurs not just 0 with new daemon mode.
475 * Revision 1.53 2001/11/05 21:41:43 steudten
476 * Add changes to be a real daemon just for unix os.
477 * (change cwd to /, detach from controlling tty, set
478 * process group and session leader to the own process.
480 * Add some fatal-error log message for failed malloc().
481 * Add '-d' if compiled with 'configure --with-debug' to
482 * enable debug output.
484 * Revision 1.52 2001/10/26 20:11:20 jongfoster
485 * Fixing type mismatch
487 * Revision 1.51 2001/10/26 17:38:28 oes
490 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
491 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
492 * threads to call select() simultaneously. So, it's time to do a real, live,
493 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
494 * (native). Both versions will work, but using __OS2__ offers multi-threading.
496 * Revision 1.49 2001/10/23 21:41:35 jongfoster
497 * Added call to initialize the (statically-allocated of course)
498 * "out of memory" CGI response.
500 * Revision 1.48 2001/10/10 19:56:46 jongfoster
501 * Moving some code that wasn't cookie-related out of an #ifdef
504 * Revision 1.47 2001/10/10 16:44:36 oes
505 * Added CONNECT destination port limitation check
507 * Revision 1.46 2001/10/08 15:17:41 oes
508 * Re-enabled SSL forwarding
510 * Revision 1.45 2001/10/07 15:42:11 oes
511 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
513 * Moved downgrading of the HTTP version from parse_http_request to
514 * chat(), since we can't decide if it is necessary before we have
515 * determined the actions for the URL. The HTTP command is now
516 * *always* re-built so the repairs need no longer be special-cased.
518 * filter_popups now gets a csp pointer so it can raise the new
519 * CSP_FLAG_MODIFIED flag.
523 * Added configurable size limit for the IOB. If the IOB grows so
524 * large that the next read would exceed the limit, the header
525 * is generated, and the header & unfiltered buffer are flushed
526 * to the client. Chat then continues in non-buffering,
527 * non-filtering body mode.
529 * Revision 1.44 2001/10/02 18:13:57 oes
532 * Revision 1.43 2001/10/02 15:32:13 oes
533 * Moved generation of hdr
535 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
536 * Cleaning up 2 compiler warnings on OS/2.
538 * Revision 1.41 2001/09/16 17:05:14 jongfoster
539 * Removing unused #include showarg.h
541 * Revision 1.40 2001/09/16 15:41:45 jongfoster
542 * Fixing signed/unsigned comparison warning.
544 * Revision 1.39 2001/09/16 13:21:27 jongfoster
545 * Changes to use new list functions.
547 * Revision 1.38 2001/09/16 13:01:46 jongfoster
548 * Removing redundant function call that zeroed zalloc()'d memory.
550 * Revision 1.37 2001/09/10 11:12:24 oes
551 * Deleted unused variable
553 * Revision 1.36 2001/09/10 10:56:15 oes
554 * Silenced compiler warnings
556 * Revision 1.35 2001/07/31 14:44:22 oes
557 * Deleted unused size parameter from filter_popups()
559 * Revision 1.34 2001/07/30 22:08:36 jongfoster
560 * Tidying up #defines:
561 * - All feature #defines are now of the form FEATURE_xxx
562 * - Permanently turned off WIN_GUI_EDIT
563 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
565 * Revision 1.33 2001/07/29 19:32:00 jongfoster
566 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
568 * Revision 1.32 2001/07/29 18:47:05 jongfoster
569 * Adding missing #include "loadcfg.h"
571 * Revision 1.31 2001/07/29 12:17:48 oes
572 * Applied pthread fix by Paul Lieverse
574 * Revision 1.30 2001/07/25 22:57:13 jongfoster
575 * __BEOS__ no longer overrides FEATURE_PTHREAD.
576 * This is because FEATURE_PTHREAD will soon be widely used, so I
577 * want to keep it simple.
579 * Revision 1.29 2001/07/24 12:47:06 oes
580 * Applied BeOS support update by Eugenia
582 * Revision 1.28 2001/07/23 13:26:12 oes
583 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
585 * Revision 1.27 2001/07/19 19:09:47 haroon
586 * - Added code to take care of the situation where while processing the first
587 * server response (which includes the server header), after finding the end
588 * of the headers we were not looking past the end of the headers for
589 * content modification. I enabled it for filter_popups.
590 * Someone else should look to see if other similar operations should be
591 * done to the discarded portion of the buffer.
593 * Note 2001/07/20: No, the other content modification mechanisms will process
594 * the whole iob later anyway. --oes
596 * Revision 1.26 2001/07/18 12:31:36 oes
599 * Revision 1.25 2001/07/15 19:43:49 jongfoster
600 * Supports POSIX threads.
601 * Also removed some unused #includes.
603 * Revision 1.24 2001/07/13 14:00:40 oes
604 * - Generic content modification scheme:
605 * Each feature has its own applicability flag that is set
606 * from csp->action->flags.
607 * Replaced the "filtering" int flag , by a function pointer
608 * "content_filter" to the function that will do the content
609 * modification. If it is != NULL, the document will be buffered
610 * and processed through *content_filter, which must set
611 * csp->content_length and return a modified copy of the body
612 * or return NULL (on failiure).
613 * - Changed csp->is_text to the more generic bitmap csp->content_type
614 * which can currently take the valued CT_TEXT or CT_GIF
616 * - Removed all #ifdef PCRS
618 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
619 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
620 * the `block_acl' call. This prevents a compilation error when the user
621 * does not wish to use the "ACL" feature.
623 * Revision 1.22 2001/06/29 21:45:41 oes
624 * Indentation, CRLF->LF, Tab-> Space
626 * Revision 1.21 2001/06/29 13:29:36 oes
627 * - Cleaned up, improved comments
628 * - Unified all possible interceptors (CGI,
629 * block, trust, fast_redirect) in one
630 * place, with one (CGI) answer generation
631 * mechansim. Much clearer now.
632 * - Removed the GIF image generation, which
633 * is now done in filters.c:block_url()
634 * - Made error conditions like domain lookup
635 * failiure or (various) problems while talking
636 * to the server use cgi.c:error_response()
637 * instead of generating HTML/HTTP in chat() (yuck!)
638 * - Removed logentry from cancelled commit
640 * Revision 1.20 2001/06/09 10:55:28 jongfoster
641 * Changing BUFSIZ ==> BUFFER_SIZE
643 * Revision 1.19 2001/06/07 23:12:52 jongfoster
644 * Replacing function pointer in struct gateway with a directly
645 * called function forwarded_connect().
646 * Replacing struct gateway with struct forward_spec
648 * Revision 1.18 2001/06/03 19:12:16 oes
649 * introduced new cgi handling
651 * Revision 1.17 2001/06/01 20:07:23 jongfoster
652 * Now uses action +image-blocker{} rather than config->tinygif
654 * Revision 1.16 2001/06/01 18:49:17 jongfoster
655 * Replaced "list_share" with "list" - the tiny memory gain was not
656 * worth the extra complexity.
658 * Revision 1.15 2001/05/31 21:24:47 jongfoster
659 * Changed "permission" to "action" throughout.
660 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
661 * Moved vanilla wafer check into chat(), since we must now
662 * decide whether or not to add it based on the URL.
664 * Revision 1.14 2001/05/29 20:14:01 joergs
665 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
668 * Revision 1.13 2001/05/29 09:50:24 jongfoster
669 * Unified blocklist/imagelist/permissionslist.
670 * File format is still under discussion, but the internal changes
673 * Also modified interceptor behaviour:
674 * - We now intercept all URLs beginning with one of the following
675 * prefixes (and *only* these prefixes):
677 * * http://ijbswa.sf.net/config/
678 * * http://ijbswa.sourceforge.net/config/
679 * - New interceptors "home page" - go to http://i.j.b/ to see it.
680 * - Internal changes so that intercepted and fast redirect pages
681 * are not replaced with an image.
682 * - Interceptors now have the option to send a binary page direct
683 * to the client. (i.e. ijb-send-banner uses this)
684 * - Implemented show-url-info interceptor. (Which is why I needed
685 * the above interceptors changes - a typical URL is
686 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
687 * The previous mechanism would not have intercepted that, and
688 * if it had been intercepted then it then it would have replaced
691 * Revision 1.12 2001/05/27 22:17:04 oes
693 * - re_process_buffer no longer writes the modified buffer
694 * to the client, which was very ugly. It now returns the
695 * buffer, which it is then written by chat.
697 * - content_length now adjusts the Content-Length: header
698 * for modified documents rather than crunch()ing it.
699 * (Length info in csp->content_length, which is 0 for
700 * unmodified documents)
702 * - For this to work, sed() is called twice when filtering.
704 * Revision 1.11 2001/05/26 17:27:53 jongfoster
705 * Added support for CLF and fixed LOG_LEVEL_LOG.
706 * Also did CRLF->LF fix of my previous patch.
708 * Revision 1.10 2001/05/26 15:26:15 jongfoster
709 * ACL feature now provides more security by immediately dropping
710 * connections from untrusted hosts.
712 * Revision 1.9 2001/05/26 00:28:36 jongfoster
713 * Automatic reloading of config file.
714 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
715 * Most of the global variables have been moved to a new
716 * struct configuration_spec, accessed through csp->config->globalname
717 * Most of the globals remaining are used by the Win32 GUI.
719 * Revision 1.8 2001/05/25 22:43:18 jongfoster
720 * Fixing minor memory leak and buffer overflow.
722 * Revision 1.7 2001/05/25 22:34:30 jongfoster
725 * Revision 1.6 2001/05/23 00:13:58 joergs
726 * AmigaOS support fixed.
728 * Revision 1.5 2001/05/22 18:46:04 oes
730 * - Enabled filtering banners by size rather than URL
731 * by adding patterns that replace all standard banner
732 * sizes with the "Junkbuster" gif to the re_filterfile
734 * - Enabled filtering WebBugs by providing a pattern
735 * which kills all 1x1 images
737 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
738 * which is selected by the (nonstandard and therefore
739 * capital) letter 'U' in the option string.
740 * It causes the quantifiers to be ungreedy by default.
741 * Appending a ? turns back to greedy (!).
743 * - Added a new interceptor ijb-send-banner, which
744 * sends back the "Junkbuster" gif. Without imagelist or
745 * MSIE detection support, or if tinygif = 1, or the
746 * URL isn't recognized as an imageurl, a lame HTML
747 * explanation is sent instead.
749 * - Added new feature, which permits blocking remote
750 * script redirects and firing back a local redirect
752 * The feature is conditionally compiled, i.e. it
753 * can be disabled with --disable-fast-redirects,
754 * plus it must be activated by a "fast-redirects"
755 * line in the config file, has its own log level
756 * and of course wants to be displayed by show-proxy-args
757 * Note: Boy, all the #ifdefs in 1001 locations and
758 * all the fumbling with configure.in and acconfig.h
759 * were *way* more work than the feature itself :-(
761 * - Because a generic redirect template was needed for
762 * this, tinygif = 3 now uses the same.
764 * - Moved GIFs, and other static HTTP response templates
769 * - Removed some >400 CRs again (Jon, you really worked
772 * Revision 1.4 2001/05/21 19:34:01 jongfoster
773 * Made failure to bind() a fatal error.
775 * Revision 1.3 2001/05/20 01:21:20 jongfoster
776 * Version 2.9.4 checkin.
777 * - Merged popupfile and cookiefile, and added control over PCRS
778 * filtering, in new "permissionsfile".
779 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
780 * file error you now get a message box (in the Win32 GUI) rather
781 * than the program exiting with no explanation.
782 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
784 * - Removed tabs from "config"
785 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
786 * - Bumped up version number.
788 * Revision 1.2 2001/05/17 22:34:44 oes
789 * - Added hint on GIF char array generation to jcc.c
790 * - Cleaned CRLF's from the sources and related files
791 * - Repaired logging for REF and FRC
793 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
794 * Initial import of version 2.9.3 source tree
797 *********************************************************************/
803 #include <sys/types.h>
812 # ifndef FEATURE_PTHREAD
816 # include <windows.h>
817 # include <process.h>
818 # endif /* ndef FEATURE_PTHREAD */
821 # ifndef _WIN_CONSOLE
823 # endif /* ndef _WIN_CONSOLE */
824 # include "w32svrapi.h"
826 #else /* ifndef _WIN32 */
828 # if !defined (__OS2__)
830 # include <sys/wait.h>
831 # endif /* ndef __OS2__ */
832 # include <sys/time.h>
833 # include <sys/stat.h>
834 # include <sys/ioctl.h>
837 #include <sys/termios.h>
848 # include <socket.h> /* BeOS has select() for sockets only. */
849 # include <OS.h> /* declarations for threads and stuff. */
852 # if defined(__EMX__) || defined(__OS2__)
853 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
858 #define bzero(B,N) memset(B,0x00,n)
873 #include "killpopup.h"
874 #include "miscutil.h"
876 #include "jbsockets.h"
881 #include "urlmatch.h"
883 const char jcc_h_rcs[] = JCC_H_VERSION;
884 const char project_h_rcs[] = PROJECT_H_VERSION;
887 struct client_state clients[1];
888 struct file_list files[1];
890 #ifdef FEATURE_STATISTICS
891 int urls_read = 0; /* total nr of urls read inc rejected */
892 int urls_rejected = 0; /* total nr of urls rejected */
893 #endif /* def FEATURE_STATISTICS */
895 #ifdef FEATURE_GRACEFUL_TERMINATION
899 static void listen_loop(void);
900 static void chat(struct client_state *csp);
902 void serve(struct client_state *csp);
903 #else /* ifndef AMIGA */
904 static void serve(struct client_state *csp);
905 #endif /* def AMIGA */
908 static int32 server_thread(void *data);
909 #endif /* def __BEOS__ */
912 #define sleep(N) Sleep(((N) * 1000))
916 #define sleep(N) DosSleep(((N) * 100))
919 #ifdef FEATURE_PTHREAD
920 pthread_mutex_t log_mutex;
921 pthread_mutex_t log_init_mutex;
923 #ifndef HAVE_GMTIME_R
924 pthread_mutex_t gmtime_mutex;
925 #endif /* ndef HAVE_GMTIME_R */
927 #ifndef HAVE_LOCALTIME_R
928 pthread_mutex_t localtime_mutex;
929 #endif /* ndef HAVE_GMTIME_R */
931 #ifndef HAVE_GETHOSTBYADDR_R
932 pthread_mutex_t gethostbyaddr_mutex;
933 #endif /* ndef HAVE_GETHOSTBYADDR_R */
935 #ifndef HAVE_GETHOSTBYNAME_R
936 pthread_mutex_t gethostbyname_mutex;
937 #endif /* ndef HAVE_GETHOSTBYNAME_R */
940 pthread_mutex_t rand_mutex;
941 #endif /* ndef HAVE_RANDOM */
943 #endif /* FEATURE_PTHREAD */
945 #if defined(unix) || defined(__EMX__)
946 const char *basedir = NULL;
947 const char *pidfile = NULL;
948 int received_hup_signal = 0;
949 #endif /* defined unix */
951 /* The vanilla wafer. */
952 static const char VANILLA_WAFER[] =
953 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
954 "Do_not_send_me_any_copyrighted_information_other_than_the_"
955 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
956 "In_particular_do_not_send_me_any_cookies_that_"
957 "are_subject_to_a_claim_of_copyright_by_anybody._"
958 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
959 "(copyright_or_otherwise)_applying_to_any_cookie._";
961 /* HTTP snipplets. */
962 const static char CSUCCEED[] =
963 "HTTP/1.0 200 Connection established\n"
964 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
966 const static char CHEADER[] =
967 "HTTP/1.0 400 Invalid header received from browser\r\n"
968 "Proxy-Agent: Privoxy " VERSION "\r\n"
969 "Content-Type: text/plain\r\n"
970 "Connection: close\r\n\r\n"
971 "Invalid header received from browser.\r\n";
973 const static char CFORBIDDEN[] =
974 "HTTP/1.0 403 Connection not allowable\r\n"
975 "Proxy-Agent: Privoxy " VERSION "\r\n"
976 "X-Hint: If you read this message interactively, then you know why this happens ,-)\r\n"
977 "Connection: close\r\n\r\n";
979 const static char FTP_RESPONSE[] =
980 "HTTP/1.0 400 Invalid request received from browser\r\n"
981 "Content-Type: text/plain\r\n"
982 "Connection: close\r\n\r\n"
983 "Invalid request. Privoxy doesn't support FTP.\r\n";
985 const static char GOPHER_RESPONSE[] =
986 "HTTP/1.0 400 Invalid request received from browser\r\n"
987 "Content-Type: text/plain\r\n"
988 "Connection: close\r\n\r\n"
989 "Invalid request. Privoxy doesn't support gopher.\r\n";
991 /* XXX: should be a template */
992 const static char MISSING_DESTINATION_RESPONSE[] =
993 "HTTP/1.0 400 Bad request received from browser\r\n"
994 "Proxy-Agent: Privoxy " VERSION "\r\n"
995 "Content-Type: text/plain\r\n"
996 "Connection: close\r\n\r\n"
997 "Bad request. Privoxy was unable to extract the destination.\r\n";
999 /* XXX: should be a template */
1000 const static char NO_SERVER_DATA_RESPONSE[] =
1001 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1002 "Proxy-Agent: Privoxy " VERSION "\r\n"
1003 "Content-Type: text/plain\r\n"
1004 "Connection: close\r\n\r\n"
1005 "Empty server or forwarder response.\r\n"
1006 "The connection was closed without sending any data.\r\n";
1008 /* XXX: should be a template */
1009 const static char NULL_BYTE_RESPONSE[] =
1010 "HTTP/1.0 400 Bad request received from browser\r\n"
1011 "Proxy-Agent: Privoxy " VERSION "\r\n"
1012 "Content-Type: text/plain\r\n"
1013 "Connection: close\r\n\r\n"
1014 "Bad request. Null byte(s) before end of request.\r\n";
1016 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1017 /*********************************************************************
1019 * Function : sig_handler
1021 * Description : Signal handler for different signals.
1022 * Exit gracefully on TERM and INT
1023 * or set a flag that will cause the errlog
1024 * to be reopened by the main thread on HUP.
1027 * 1 : the_signal = the signal cause this function to call
1031 *********************************************************************/
1032 static void sig_handler(int the_signal)
1038 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1049 received_hup_signal = 1;
1054 * We shouldn't be here, unless we catch signals
1055 * in main() that we can't handle here!
1057 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1065 /*********************************************************************
1067 * Function : client_protocol_is_unsupported
1069 * Description : Checks if the client used a known unsupported
1070 * protocol and deals with it by sending an error
1074 * 1 : csp = Current client state (buffers, headers, etc...)
1075 * 2 : req = the first request line send by the client
1077 * Returns : TRUE if an error response has been generated, or
1078 * FALSE if the request doesn't look invalid.
1080 *********************************************************************/
1081 int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1083 char buf[BUFFER_SIZE];
1086 * If it's a FTP or gopher request, we don't support it.
1088 * These checks are better than nothing, but they might
1089 * not work in all configurations and some clients might
1090 * have problems digesting the answer.
1092 * They should, however, never cause more problems than
1093 * Privoxy's old behaviour (returning the misleading HTML
1096 * "Could not resolve http://(ftp|gopher)://example.org").
1098 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1100 if (!strncmpic(req, "GET ftp://", 10))
1102 strcpy(buf, FTP_RESPONSE);
1103 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as FTP proxy: %s",
1104 csp->ip_addr_str, req);
1108 strcpy(buf, GOPHER_RESPONSE);
1109 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as gopher proxy: %s",
1110 csp->ip_addr_str, req);
1112 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1114 write_socket(csp->cfd, buf, strlen(buf));
1123 /*********************************************************************
1125 * Function : get_request_destination_elsewhere
1127 * Description : If the client's request was redirected into
1128 * Privoxy without the client's knowledge,
1129 * the request line lacks the destination host.
1131 * This function tries to get it elsewhere,
1132 * provided accept-intercepted-requests is enabled.
1134 * "Elsewhere" currently only means "Host: header",
1135 * but in the future we may ask the redirecting
1136 * packet filter to look the destination up.
1138 * If the destination stays unknown, an error
1139 * response is send to the client and headers
1140 * are freed so that chat() can return directly.
1143 * 1 : csp = Current client state (buffers, headers, etc...)
1144 * 2 : headers = a header list
1146 * Returns : JB_ERR_OK if the destination is now known, or
1147 * JB_ERR_PARSE if it isn't.
1149 *********************************************************************/
1150 jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1152 char buf[BUFFER_SIZE];
1155 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1157 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1158 " Privoxy isn't configured to accept intercepted requests.",
1159 csp->ip_addr_str, csp->http->cmd);
1160 /* XXX: Use correct size */
1161 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1162 csp->ip_addr_str, csp->http->cmd);
1164 strcpy(buf, CHEADER);
1165 write_socket(csp->cfd, buf, strlen(buf));
1166 destroy_list(headers);
1168 return JB_ERR_PARSE;
1170 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1172 /* Split the domain we just got for pattern matching */
1173 init_domain_components(csp->http);
1179 /* We can't work without destination. Go spread the news.*/
1181 req = list_to_text(headers);
1183 /* XXX: Use correct size */
1184 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1185 csp->ip_addr_str, csp->http->cmd);
1186 log_error(LOG_LEVEL_ERROR,
1187 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1188 csp->ip_addr_str, csp->http->cmd, req);
1191 strcpy(buf, MISSING_DESTINATION_RESPONSE);
1192 write_socket(csp->cfd, buf, strlen(buf));
1193 destroy_list(headers);
1195 return JB_ERR_PARSE;
1198 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1199 * to get the destination IP address, use it as host directly
1200 * or do a reverse DNS lookup first.
1205 /*********************************************************************
1207 * Function : get_server_headers
1209 * Description : Parses server headers in iob and fills them
1210 * into csp->headers so that they can later be
1214 * 1 : csp = Current client state (buffers, headers, etc...)
1216 * Returns : JB_ERR_OK if everything went fine, or
1217 * JB_ERR_PARSE if the headers were incomplete.
1219 *********************************************************************/
1220 jb_err get_server_headers(struct client_state *csp)
1222 int continue_hack_in_da_house = 0;
1225 while (((header = get_header(csp)) != NULL) || continue_hack_in_da_house)
1230 * continue hack in da house. Ignore the ending of
1231 * this head and continue enlisting header lines.
1232 * The reason is described below.
1234 enlist(csp->headers, "");
1235 continue_hack_in_da_house = 0;
1238 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1241 * It's a bodyless continue response, don't
1242 * stop header parsing after reaching it's end.
1244 * As a result Privoxy will concatenate the
1245 * next response's head and parse and deliver
1246 * the headers as if they belonged to one request.
1248 * The client will separate them because of the
1249 * empty line between them.
1251 * XXX: What we're doing here is clearly against
1252 * the intended purpose of the continue header,
1253 * and under some conditions (HTTP/1.0 client request)
1254 * it's a standard violation.
1256 * Anyway, "sort of against the spec" is preferable
1257 * to "always getting confused by Continue responses"
1258 * (Privoxy's behaviour before this hack was added)
1260 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1261 continue_hack_in_da_house = 1;
1263 else if (*header == '\0')
1266 * If the header is empty, but the Continue hack
1267 * isn't active, we can assume that we reached the
1268 * end of the buffer before we hit the end of the
1271 * Inform the caller an let it decide how to handle it.
1273 return JB_ERR_PARSE;
1277 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1280 * XXX: Should we quit the request and return a
1281 * out of memory error page instead?
1283 log_error(LOG_LEVEL_ERROR,
1284 "Out of memory while enlisting server headers. %s lost.",
1294 /*********************************************************************
1296 * Function : crunch_reason
1298 * Description : Translates the crunch reason code into a string.
1301 * 1 : rsp = a http_response
1303 * Returns : A string with the crunch reason or an error description.
1305 *********************************************************************/
1306 const char *crunch_reason(const struct http_response *rsp)
1308 char * reason = NULL;
1310 assert(rsp != NULL);
1313 return "Internal error while searching for crunch reason";
1316 switch (rsp->reason)
1318 case RSP_REASON_UNSUPPORTED:
1319 reason = "Unsupported HTTP feature";
1321 case RSP_REASON_BLOCKED:
1324 case RSP_REASON_UNTRUSTED:
1325 reason = "Untrusted";
1327 case RSP_REASON_REDIRECTED:
1328 reason = "Redirected";
1330 case RSP_REASON_CGI_CALL:
1331 reason = "CGI Call";
1333 case RSP_REASON_NO_SUCH_DOMAIN:
1334 reason = "DNS failure";
1336 case RSP_REASON_FORWARDING_FAILED:
1337 reason = "Forwarding failed";
1339 case RSP_REASON_CONNECT_FAILED:
1340 reason = "Connection failure";
1342 case RSP_REASON_OUT_OF_MEMORY:
1343 reason = "Out of memory (may mask other reasons)";
1346 reason = "No reason recorded";
1354 /*********************************************************************
1356 * Function : send_crunch_response
1358 * Description : Delivers already prepared response for
1359 * intercepted requests, logs the interception
1360 * and frees the response.
1363 * 1 : csp = Current client state (buffers, headers, etc...)
1364 * 1 : rsp = Fully prepared response. Will be freed on exit.
1366 * Returns : Nothing.
1368 *********************************************************************/
1369 void send_crunch_response(struct client_state *csp, struct http_response *rsp)
1371 const struct http_request *http = csp->http;
1372 char status_code[4];
1374 assert(rsp != NULL);
1375 assert(rsp->head != NULL);
1380 * Not supposed to happen. If it does
1381 * anyway, treat it as an unknown error.
1383 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1384 /* return code doesn't matter */
1389 /* If rsp is still NULL, we have serious internal problems. */
1390 log_error(LOG_LEVEL_FATAL,
1391 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1395 * Extract the status code from the actual head
1396 * that was send to the client. It is the only
1397 * way to get it right for all requests, including
1398 * the fixed ones for out-of-memory problems.
1400 * A head starts like this: 'HTTP/1.1 200...'
1404 status_code[0] = rsp->head[9];
1405 status_code[1] = rsp->head[10];
1406 status_code[2] = rsp->head[11];
1407 status_code[3] = '\0';
1409 /* Write the answer to the client */
1410 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1411 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1413 /* There is nothing we can do about it. */
1414 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1417 /* Log that the request was crunched and why. */
1418 log_error(LOG_LEVEL_GPC, "%s%s crunch! (%s)",
1419 http->hostport, http->path, crunch_reason(rsp));
1420 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %d",
1421 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1423 /* Clean up and return */
1424 if (cgi_error_memory() != rsp)
1426 free_http_response(rsp);
1432 /*********************************************************************
1434 * Function : request_contains_null_bytes
1436 * Description : Checks for NULL bytes in the request and sends
1437 * an error message to the client if any were found.
1440 * 1 : csp = Current client state (buffers, headers, etc...)
1441 * 2 : buf = Data from the client's request to check.
1442 * 3 : len = The data length.
1444 * Returns : TRUE if the request contained one or more NULL bytes, or
1447 *********************************************************************/
1448 int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1450 size_t c_len; /* Request lenght when treated as C string */
1452 c_len = strlen(buf);
1457 * Null byte(s) found. Log the request,
1458 * return an error response and hang up.
1460 size_t tmp_len = c_len;
1465 * Replace NULL byte(s) with '°' characters
1466 * so the request can be logged as string.
1467 * XXX: Is there a better replacement character?
1470 tmp_len += strlen(buf+tmp_len);
1471 } while (tmp_len < len);
1473 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1474 "(length=%d, strlen=%d).", csp->ip_addr_str, len, c_len);
1475 log_error(LOG_LEVEL_HEADER,
1476 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1478 strcpy(buf, NULL_BYTE_RESPONSE);
1479 write_socket(csp->cfd, buf, strlen(buf));
1481 /* XXX: Log correct size */
1482 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1491 /*********************************************************************
1493 * Function : crunch_response_triggered
1495 * Description : Checks if the request has to be crunched,
1496 * and delivers the crunch response if necessary.
1499 * 1 : csp = Current client state (buffers, headers, etc...)
1501 * Returns : TRUE if the request was answered with a crunch response
1504 *********************************************************************/
1505 int crunch_response_triggered(struct client_state *csp)
1508 * This next lines are a little ugly, but they simplify the if statements
1509 * below. Basically if TOGGLE, then we want the if to test if the
1510 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
1511 * then we want the if to test for CSP_FLAG_FORCED, else we don't.
1513 #ifdef FEATURE_TOGGLE
1514 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
1515 #else /* ifndef FEATURE_TOGGLE */
1516 # define IS_TOGGLED_ON_AND
1517 #endif /* ndef FEATURE_TOGGLE */
1518 #ifdef FEATURE_FORCE_LOAD
1519 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
1520 #else /* ifndef FEATURE_FORCE_LOAD */
1521 # define IS_NOT_FORCED_AND
1522 #endif /* def FEATURE_FORCE_LOAD */
1524 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
1526 struct http_response *rsp = NULL;
1529 /* We may not forward the request by rfc2616 sect 14.31 */
1530 (NULL != (rsp = direct_response(csp)))
1532 /* or we are enabled and... */
1533 || (IS_ENABLED_AND (
1535 /* ..the request was blocked */
1536 ( NULL != (rsp = block_url(csp)))
1538 /* ..or untrusted */
1539 #ifdef FEATURE_TRUST
1540 || ( NULL != (rsp = trust_url(csp)))
1541 #endif /* def FEATURE_TRUST */
1543 /* ..or a redirect kicked in */
1544 || ( NULL != (rsp = redirect_url(csp)))
1547 * .. or a CGI call was detected and answered.
1549 * This check comes last to give the user the power
1550 * to deny acces to some (or all) of the cgi pages.
1552 || (NULL != (rsp = dispatch_cgi(csp)))
1556 /* Deliver, log and free the interception response. */
1557 send_crunch_response(csp, rsp);
1558 #ifdef FEATURE_STATISTICS
1559 csp->flags |= CSP_FLAG_REJECTED;
1560 #endif /* def FEATURE_STATISTICS */
1569 /*********************************************************************
1571 * Function : build_request_line
1573 * Description : Builds the HTTP request line.
1575 * If a HTTP forwarder is used it expects the whole URL,
1576 * web servers only get the path.
1579 * 1 : csp = Current client state (buffers, headers, etc...)
1580 * 2 : fwd = The forwarding spec used for the request
1582 * Returns : Nothing. Terminates in case of memory problems.
1584 *********************************************************************/
1585 void build_request_line(struct client_state *csp, const struct forward_spec *fwd)
1587 struct http_request *http = csp->http;
1589 assert(http->ssl == 0);
1592 * Downgrade http version from 1.1 to 1.0
1593 * if +downgrade action applies.
1595 if ( (csp->action->flags & ACTION_DOWNGRADE)
1596 && (!strcmpic(http->ver, "HTTP/1.1")))
1599 http->ver = strdup("HTTP/1.0");
1601 if (http->ver == NULL)
1603 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1608 * Rebuild the request line.
1609 * XXX: If a http forwarder is used and the HTTP version
1610 * wasn't downgraded, we don't have to rebuild anything.
1614 http->cmd = strdup(http->gpc);
1615 string_append(&http->cmd, " ");
1617 if (fwd->forward_host)
1619 string_append(&http->cmd, http->url);
1623 string_append(&http->cmd, http->path);
1625 string_append(&http->cmd, " ");
1626 string_append(&http->cmd, http->ver);
1628 if (http->cmd == NULL)
1630 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1632 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", http->cmd);
1636 /*********************************************************************
1640 * Description : Once a connection to the client has been accepted,
1641 * this function is called (via serve()) to handle the
1642 * main business of the communication. When this
1643 * function returns, the caller must close the client
1646 * FIXME: chat is nearly thousand lines long.
1650 * 1 : csp = Current client state (buffers, headers, etc...)
1652 * Returns : Nothing.
1654 *********************************************************************/
1655 static void chat(struct client_state *csp)
1657 char buf[BUFFER_SIZE];
1665 int ms_iis5_hack = 0;
1666 size_t byte_count = 0;
1667 int forwarded_connect_retries = 0;
1668 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
1669 const struct forward_spec * fwd;
1670 struct http_request *http;
1671 int len; /* for buffer sizes (and negative error codes) */
1672 #ifdef FEATURE_KILL_POPUPS
1673 int block_popups; /* bool, 1==will block popups */
1674 int block_popups_now = 0; /* bool, 1==currently blocking popups */
1675 #endif /* def FEATURE_KILL_POPUPS */
1677 int pcrs_filter; /* bool, 1==will filter through pcrs */
1678 int gif_deanimate; /* bool, 1==will deanimate gifs */
1679 int jpeg_inspect; /* bool, 1==will inspect jpegs */
1681 /* Function that does the content filtering for the current request */
1682 char *(*content_filter)() = NULL;
1684 /* Skeleton for HTTP response, if we should intercept the request */
1685 struct http_response *rsp;
1687 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1688 struct list header_list;
1689 struct list *headers = &header_list;
1693 memset(buf, 0, sizeof(buf));
1696 * Read the client's request. Note that since we're not using select() we
1697 * could get blocked here if a client connected, then didn't say anything!
1702 len = read_socket(csp->cfd, buf, sizeof(buf)-1);
1704 if (len <= 0) break; /* error! */
1706 if (request_contains_null_bytes(csp, buf, len))
1708 /* NULL bytes found and dealt with, just hang up. */
1713 * If there is no memory left for buffering the
1714 * request, there is nothing we can do but hang up
1716 if (add_to_iob(csp, buf, len))
1721 req = get_header(csp);
1725 break; /* no HTTP request! */
1730 continue; /* more to come! */
1733 /* Does the request line look invalid? */
1734 if (client_protocol_is_unsupported(csp, req))
1737 * Yes. The request has already been
1738 * answered with a error response, the buffers
1739 * were freed and we're done with chatting.
1744 #ifdef FEATURE_FORCE_LOAD
1746 * If this request contains the FORCE_PREFIX and blocks
1747 * aren't enforced, get rid of it and set the force flag.
1749 if (strstr(req, FORCE_PREFIX))
1751 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
1753 log_error(LOG_LEVEL_FORCE,
1754 "Ignored force prefix in request: \"%s\".", req);
1758 strclean(req, FORCE_PREFIX);
1759 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
1760 csp->flags |= CSP_FLAG_FORCED;
1764 #endif /* def FEATURE_FORCE_LOAD */
1766 switch( parse_http_request(req, http, csp) )
1769 log_error(LOG_LEVEL_ERROR, "Out of memory while parsing request.");
1772 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", req);
1780 if (http->cmd == NULL)
1782 strcpy(buf, CHEADER);
1783 write_socket(csp->cfd, buf, strlen(buf));
1784 /* XXX: Use correct size */
1785 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1786 log_error(LOG_LEVEL_ERROR, "Invalid header received from %s.", csp->ip_addr_str);
1788 free_http_request(http);
1792 /* grab the rest of the client's headers */
1796 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1798 len = read_socket(csp->cfd, buf, sizeof(buf));
1801 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1806 * If there is no memory left for buffering the
1807 * request, there is nothing we can do but hang up
1809 if (add_to_iob(csp, buf, len))
1816 if (p == NULL) break;
1823 if (http->host == NULL)
1826 * If we still don't know the request destination,
1827 * the request is invalid or the client uses
1828 * Privoxy without its knowledge.
1830 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
1833 * Our attempts to get the request destination
1834 * elsewhere failed or Privoxy is configured
1835 * to only accept proxy requests.
1837 * An error response has already been send
1838 * and we're done here.
1844 /* decide how to route the HTTP request */
1846 if ((fwd = forward_url(http, csp)) == NULL)
1848 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1849 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1852 /* build the http request to send to the server
1853 * we have to do one of the following:
1855 * create = use the original HTTP request to create a new
1856 * HTTP request that has either the path component
1857 * without the http://domainspec (w/path) or the
1858 * full orininal URL (w/url)
1859 * Note that the path and/or the HTTP version may
1860 * have been altered by now.
1862 * connect = Open a socket to the host:port of the server
1863 * and short-circuit server and client socket.
1865 * pass = Pass the request unchanged if forwarding a CONNECT
1866 * request to a parent proxy. Note that we'll be sending
1867 * the CFAIL message ourselves if connecting to the parent
1868 * fails, but we won't send a CSUCCEED message if it works,
1869 * since that would result in a double message (ours and the
1870 * parent's). After sending the request to the parent, we simply
1873 * here's the matrix:
1876 * +--------+--------+
1878 * 0 | create | connect|
1880 * Forwarding +--------+--------+
1882 * 1 | create | pass |
1884 * +--------+--------+
1889 * Determine the actions for this URL
1891 #ifdef FEATURE_TOGGLE
1892 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1894 /* Most compatible set of actions (i.e. none) */
1895 init_current_action(csp->action);
1898 #endif /* ndef FEATURE_TOGGLE */
1900 url_actions(http, csp);
1905 * Check if a CONNECT request is allowable:
1906 * In the absence of a +limit-connect action, allow only port 443.
1907 * If there is an action, allow whatever matches the specificaton.
1911 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
1912 || (csp->action->flags & ACTION_LIMIT_CONNECT
1913 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
1915 if (csp->action->flags & ACTION_TREAT_FORBIDDEN_CONNECTS_LIKE_BLOCKS)
1918 * The response may confuse some clients,
1919 * but makes unblocking easier.
1921 log_error(LOG_LEVEL_ERROR, "Marking suspicious CONNECT request from %s for blocking.",
1923 csp->action->flags |= ACTION_BLOCK;
1928 strcpy(buf, CFORBIDDEN);
1929 write_socket(csp->cfd, buf, strlen(buf));
1930 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
1931 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
1939 * Save a copy of the original request for logging
1941 http->ocmd = strdup(http->cmd);
1943 if (http->ocmd == NULL)
1945 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
1949 * (Re)build the HTTP request for non-SSL requests.
1953 build_request_line(csp, fwd);
1955 enlist(csp->headers, http->cmd);
1957 /* Append the previously read headers */
1958 list_append_list_unique(csp->headers, headers);
1959 destroy_list(headers);
1962 * If the user has not supplied any wafers, and the user has not
1963 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1965 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1966 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1968 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1971 hdr = sed(client_patterns, add_client_headers, csp);
1974 /* FIXME Should handle error properly */
1975 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1977 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
1979 #ifdef FEATURE_KILL_POPUPS
1980 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
1981 #endif /* def FEATURE_KILL_POPUPS */
1983 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
1984 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
1986 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
1988 jpeg_inspect = ((csp->action->flags & ACTION_JPEG_INSPECT) != 0);
1991 * We have a request. Check if one of the crunchers wants it.
1993 if (crunch_response_triggered(csp))
1996 * Yes. The client got the crunch response
1997 * and we are done here after cleaning up.
2000 list_remove_all(csp->headers);
2006 * The headers can't be removed earlier because
2007 * they were still needed for the referrer check
2008 * in case of CGI crunches.
2010 * XXX: Would it be worth to move the referrer check
2011 * into client_referrer() and set a flag if it's trusted?
2013 list_remove_all(csp->headers);
2015 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2017 if (fwd->forward_host)
2019 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2020 fwd->forward_host, fwd->forward_port, http->hostport);
2024 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2027 /* here we connect to the server, gateway, or the forwarder */
2029 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
2030 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2032 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
2033 forwarded_connect_retries, http->hostport);
2036 if (csp->sfd == JB_INVALID_SOCKET)
2038 if (fwd->type != SOCKS_NONE)
2041 rsp = error_response(csp, "forwarding-failed", errno);
2043 else if (errno == EINVAL)
2045 rsp = error_response(csp, "no-such-domain", errno);
2049 rsp = error_response(csp, "connect-failed", errno);
2050 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2055 /* Write the answer to the client */
2058 send_crunch_response(csp, rsp);
2065 if (fwd->forward_host || (http->ssl == 0))
2067 /* write the client's (modified) header to the server
2068 * (along with anything else that may be in the buffer)
2071 if (write_socket(csp->sfd, hdr, strlen(hdr))
2072 || (flush_socket(csp->sfd, csp) < 0))
2074 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
2077 rsp = error_response(csp, "connect-failed", errno);
2081 send_crunch_response(csp, rsp);
2091 * We're running an SSL tunnel and we're not forwarding,
2092 * so just send the "connect succeeded" message to the
2093 * client, flush the rest, and get out of the way.
2095 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
2103 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2105 /* we're finished with the client's header */
2108 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
2110 /* pass data between the client and server
2111 * until one or the other shuts down the connection.
2120 * FD_ZERO here seems to point to an errant macro which crashes.
2121 * So do this by hand for now...
2123 memset(&rfds,0x00,sizeof(fd_set));
2127 FD_SET(csp->cfd, &rfds);
2128 FD_SET(csp->sfd, &rfds);
2130 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
2134 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2138 /* this is the body of the browser's request
2139 * just read it and write it.
2142 if (FD_ISSET(csp->cfd, &rfds))
2144 len = read_socket(csp->cfd, buf, sizeof(buf));
2148 break; /* "game over, man" */
2151 if (write_socket(csp->sfd, buf, (size_t)len))
2153 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2160 * The server wants to talk. It could be the header or the body.
2161 * If `hdr' is null, then it's the header otherwise it's the body.
2162 * FIXME: Does `hdr' really mean `host'? No.
2166 if (FD_ISSET(csp->sfd, &rfds))
2169 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2173 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2175 if (http->ssl && (fwd->forward_host == NULL))
2178 * Just hang up. We already confirmed the client's CONNECT
2179 * request with status code 200 and unencrypted content is
2180 * no longer welcome.
2182 log_error(LOG_LEVEL_ERROR,
2183 "CONNECT already confirmed. Unable to tell the client about the problem.");
2187 rsp = error_response(csp, "connect-failed", errno);
2191 send_crunch_response(csp, rsp);
2197 /* Add a trailing zero. This lets filter_popups
2198 * use string operations.
2202 #ifdef FEATURE_KILL_POPUPS
2203 /* Filter the popups on this read. */
2204 if (block_popups_now)
2206 filter_popups(buf, csp);
2208 #endif /* def FEATURE_KILL_POPUPS */
2210 /* Normally, this would indicate that we've read
2211 * as much as the server has sent us and we can
2212 * close the client connection. However, Microsoft
2213 * in its wisdom has released IIS/5 with a bug that
2214 * prevents it from sending the trailing \r\n in
2215 * a 302 redirect header (and possibly other headers).
2216 * To work around this if we've haven't parsed
2217 * a full header we'll append a trailing \r\n
2218 * and see if this now generates a valid one.
2220 * This hack shouldn't have any impacts. If we've
2221 * already transmitted the header or if this is a
2222 * SSL connection, then we won't bother with this
2223 * hack. So we only work on partially received
2224 * headers. If we append a \r\n and this still
2225 * doesn't generate a valid header, then we won't
2226 * transmit anything to the client.
2231 if (server_body || http->ssl)
2234 * If we have been buffering up the document,
2235 * now is the time to apply content modification
2236 * and send the result to the client.
2241 * If the content filter fails, use the original
2242 * buffer and length.
2243 * (see p != NULL ? p : csp->iob->cur below)
2245 if (NULL == (p = (*content_filter)(csp)))
2247 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2250 hdr = sed(server_patterns_light, NULL, csp);
2254 /* FIXME Should handle error properly */
2255 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2258 if (write_socket(csp->cfd, hdr, strlen(hdr))
2259 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
2261 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2271 break; /* "game over, man" */
2275 * This is NOT the body, so
2276 * Let's pretend the server just sent us a blank line.
2278 snprintf(buf, sizeof(buf), "\r\n");
2279 len = (int)strlen(buf);
2282 * Now, let the normal header parsing algorithm below do its
2283 * job. If it fails, we'll exit instead of continuing.
2290 * If this is an SSL connection or we're in the body
2291 * of the server document, just write it to the client,
2292 * unless we need to buffer the body for later content-filtering
2295 if (server_body || http->ssl)
2300 * If there is no memory left for buffering the content, or the buffer limit
2301 * has been reached, switch to non-filtering mode, i.e. make & write the
2302 * header, flush the iob and buf, and get out of the way.
2304 if (add_to_iob(csp, buf, len))
2309 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
2311 hdr = sed(server_patterns, add_server_headers, csp);
2315 * Memory is too tight to even generate the header.
2316 * Send our static "Out-of-memory" page.
2318 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2319 rsp = cgi_error_memory();
2320 send_crunch_response(csp, rsp);
2325 hdrlen = strlen(hdr);
2327 if (write_socket(csp->cfd, hdr, hdrlen)
2328 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
2329 || (write_socket(csp->cfd, buf, (size_t)len)))
2331 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
2337 byte_count += hdrlen + (size_t)flushed + (size_t)len;
2339 content_filter = NULL;
2346 if (write_socket(csp->cfd, buf, (size_t)len))
2348 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2352 byte_count += (size_t)len;
2357 /* we're still looking for the end of the
2358 * server's header ... (does that make header
2359 * parsing an "out of body experience" ?
2363 * buffer up the data we just read. If that fails,
2364 * there's little we can do but send our static
2365 * out-of-memory page.
2367 if (add_to_iob(csp, buf, len))
2369 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2370 rsp = cgi_error_memory();
2371 send_crunch_response(csp, rsp);
2376 /* Convert iob into something sed() can digest */
2377 if (JB_ERR_PARSE == get_server_headers(csp))
2381 /* Well, we tried our MS IIS/5
2382 * hack and it didn't work.
2383 * The header is incomplete
2384 * and there isn't anything
2385 * we can do about it.
2391 /* Since we have to wait for
2392 * more from the server before
2393 * we can parse the headers
2394 * we just continue here.
2400 /* Did we actually get anything? */
2401 if (NULL == csp->headers->first)
2403 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
2404 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2405 strcpy(buf, NO_SERVER_DATA_RESPONSE);
2406 write_socket(csp->cfd, buf, strlen(buf));
2407 free_http_request(http);
2411 /* we have now received the entire header.
2412 * filter it and send the result to the client
2415 hdr = sed(server_patterns, add_server_headers, csp);
2418 /* FIXME Should handle error properly */
2419 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2422 #ifdef FEATURE_KILL_POPUPS
2423 /* Start blocking popups if appropriate. */
2425 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
2426 !http->ssl && /* We talk plaintext */
2427 block_popups) /* Policy allows */
2429 block_popups_now = 1;
2431 * Filter the part of the body that came in the same read
2432 * as the last headers:
2434 filter_popups(csp->iob->cur, csp);
2437 #endif /* def FEATURE_KILL_POPUPS */
2439 /* Buffer and pcrs filter this if appropriate. */
2441 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
2442 !http->ssl && /* We talk plaintext */
2443 pcrs_filter) /* Policy allows */
2445 content_filter = pcrs_filter_response;
2448 /* Buffer and gif_deanimate this if appropriate. */
2450 if ((csp->content_type & CT_GIF) && /* It's an image/gif MIME-Type */
2451 !http->ssl && /* We talk plaintext */
2452 gif_deanimate) /* Policy allows */
2454 content_filter = gif_deanimate_response;
2457 /* Buffer and jpg_inspect this if appropriate. */
2459 if ((csp->content_type & CT_JPEG) && /* It's an image/jpeg MIME-Type */
2460 !http->ssl && /* We talk plaintext */
2461 jpeg_inspect) /* Policy allows */
2463 content_filter = jpeg_inspect_response;
2467 * Only write if we're not buffering for content modification
2469 if (!content_filter)
2471 /* write the server's (modified) header to
2472 * the client (along with anything else that
2473 * may be in the buffer)
2476 if (write_socket(csp->cfd, hdr, strlen(hdr))
2477 || ((len = flush_socket(csp->cfd, csp)) < 0))
2479 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
2481 /* the write failed, so don't bother
2482 * mentioning it to the client...
2483 * it probably can't hear us anyway.
2489 byte_count += (size_t)len;
2492 /* we're finished with the server's header */
2497 /* If this was a MS IIS/5 hack then it means
2498 * the server has already closed the
2499 * connection. Nothing more to read. Time
2510 return; /* huh? we should never get here */
2513 if (csp->content_length == 0)
2516 * If Privoxy didn't recalculate the
2517 * Content-Lenght, byte_count is still
2520 csp->content_length = byte_count;
2523 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
2524 csp->ip_addr_str, http->ocmd, csp->content_length);
2528 /*********************************************************************
2532 * Description : This is little more than chat. We only "serve" to
2533 * to close any socket that chat may have opened.
2536 * 1 : csp = Current client state (buffers, headers, etc...)
2540 *********************************************************************/
2542 void serve(struct client_state *csp)
2543 #else /* ifndef AMIGA */
2544 static void serve(struct client_state *csp)
2545 #endif /* def AMIGA */
2548 close_socket(csp->cfd);
2550 if (csp->sfd != JB_INVALID_SOCKET)
2552 close_socket(csp->sfd);
2555 csp->flags &= ~CSP_FLAG_ACTIVE;
2561 /*********************************************************************
2563 * Function : server_thread
2565 * Description : We only exist to call `serve' in a threaded environment.
2568 * 1 : data = Current client state (buffers, headers, etc...)
2570 * Returns : Always 0.
2572 *********************************************************************/
2573 static int32 server_thread(void *data)
2575 serve((struct client_state *) data);
2582 /*********************************************************************
2586 * Description : Print usage info & exit.
2588 * Parameters : Pointer to argv[0] for identifying ourselves
2592 *********************************************************************/
2593 void usage(const char *myname)
2595 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
2597 "Usage: %s [--help] [--version] [configfile]\n"
2599 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
2601 "Aborting.\n", myname);
2608 /*********************************************************************
2610 * Function : initialize_mutexes
2612 * Description : Prepares mutexes if mutex support is available.
2616 * Returns : Void, exits in case of errors.
2618 *********************************************************************/
2619 void initialize_mutexes()
2623 #ifdef FEATURE_PTHREAD
2625 * Prepare global mutex semaphores
2627 err = pthread_mutex_init(&log_mutex, 0);
2629 if (!err) err = pthread_mutex_init(&log_init_mutex, 0);
2632 * XXX: The assumptions below are a bit naive
2633 * and can cause locks that aren't necessary.
2635 * For example older FreeBSD versions (< 6.x?)
2636 * have no gethostbyname_r, but gethostbyname is
2639 #ifndef HAVE_GMTIME_R
2640 if (!err) err = pthread_mutex_init(&gmtime_mutex, 0);
2641 #endif /* ndef HAVE_GMTIME_R */
2643 #ifndef HAVE_LOCALTIME_R
2644 if (!err) err = pthread_mutex_init(&localtime_mutex, 0);
2645 #endif /* ndef HAVE_GMTIME_R */
2647 #ifndef HAVE_GETHOSTBYADDR_R
2648 if (!err) err = pthread_mutex_init(&gethostbyaddr_mutex, 0);
2649 #endif /* ndef HAVE_GETHOSTBYADDR_R */
2651 #ifndef HAVE_GETHOSTBYNAME_R
2652 if (!err) err = pthread_mutex_init(&gethostbyname_mutex, 0);
2653 #endif /* ndef HAVE_GETHOSTBYNAME_R */
2656 if (!err) err = pthread_mutex_init(&rand_mutex, 0);
2657 #endif /* ndef HAVE_RANDOM */
2658 #endif /* FEATURE_PTHREAD */
2661 * TODO: mutex support for mingw32 would be swell.
2666 printf("Fatal error. Mutex initialization failed: %s.\n",
2675 /*********************************************************************
2679 * Description : Load the config file and start the listen loop.
2680 * This function is a lot more *sane* with the `load_config'
2681 * and `listen_loop' functions; although it stills does
2682 * a *little* too much for my taste.
2685 * 1 : argc = Number of parameters (including $0).
2686 * 2 : argv = Array of (char *)'s to the parameters.
2688 * Returns : 1 if : can't open config file, unrecognized directive,
2689 * stats requested in multi-thread mode, can't open the
2690 * log file, can't open the jar file, listen port is invalid,
2691 * any load fails, and can't bind port.
2693 * Else main never returns, the process must be signaled
2694 * to terminate execution. Or, on Windows, use the
2695 * "File", "Exit" menu option.
2697 *********************************************************************/
2699 int real_main(int argc, const char *argv[])
2701 int main(int argc, const char *argv[])
2705 unsigned int random_seed;
2707 struct passwd *pw = NULL;
2708 struct group *grp = NULL;
2717 #if !defined(_WIN32)
2725 * Parse the command line arguments
2727 while (++argc_pos < argc)
2730 /* Check to see if the service must be installed or uninstalled */
2731 if (strncmp(argv[argc_pos], "--install", 9) == 0)
2733 const char *pName = argv[argc_pos] + 9;
2736 exit( (install_service(pName)) ? 0 : 1 );
2738 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
2740 const char *pName = argv[argc_pos] + 11;
2743 exit((uninstall_service(pName)) ? 0 : 1);
2745 else if (strcmp(argv[argc_pos], "--service" ) == 0)
2747 bRunAsService = TRUE;
2748 w32_set_service_cwd();
2749 atexit(w32_service_exit_notify);
2752 #endif /* defined(_WIN32) */
2755 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2757 if (strcmp(argv[argc_pos], "--help") == 0)
2762 else if(strcmp(argv[argc_pos], "--version") == 0)
2764 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
2770 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
2775 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
2777 if (++argc_pos == argc) usage(argv[0]);
2778 pidfile = strdup(argv[argc_pos]);
2781 else if (strcmp(argv[argc_pos], "--user" ) == 0)
2783 if (++argc_pos == argc) usage(argv[argc_pos]);
2785 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
2788 if (NULL == (grp = getgrnam(p)))
2790 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
2794 if (NULL == (pw = getpwnam(argv[argc_pos])))
2796 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
2799 if (p != NULL) *--p = '\0';
2802 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
2807 #endif /* defined(unix) */
2808 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
2810 configfile = argv[argc_pos];
2813 } /* -END- while (more arguments) */
2816 if ( *configfile != '/' )
2818 char *abs_file, cwd[1024];
2820 /* make config-filename absolute here */
2821 if ( !(getcwd(cwd, sizeof(cwd))))
2823 perror("get working dir failed");
2827 if (!(basedir = strdup(cwd))
2828 || (!(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))))
2830 perror("malloc failed");
2833 strcpy( abs_file, basedir );
2834 strcat( abs_file, "/" );
2835 strcat( abs_file, configfile );
2836 configfile = abs_file;
2838 #endif /* defined unix */
2842 clients->next = NULL;
2846 #elif defined(_WIN32)
2850 /* Prepare mutexes if supported and necessary. */
2851 initialize_mutexes();
2853 random_seed = (unsigned int)time(NULL);
2855 srandom(random_seed);
2858 #endif /* ifdef HAVE_RANDOM */
2861 * Unix signal handling
2863 * Catch the abort, interrupt and terminate signals for a graceful exit
2864 * Catch the hangup signal so the errlog can be reopened.
2865 * Ignore the broken pipe signals (FIXME: Why?)
2867 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
2870 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
2871 const int ignored_signals[] = { SIGPIPE, 0 };
2873 for (idx = 0; catched_signals[idx] != 0; idx++)
2875 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
2876 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
2878 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
2879 #endif /* ifdef sun */
2881 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
2885 for (idx = 0; ignored_signals[idx] != 0; idx++)
2887 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
2889 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
2894 #else /* ifdef _WIN32 */
2895 # ifdef _WIN_CONSOLE
2897 * We *are* in a windows console app.
2898 * Print a verbose messages about FAQ's and such
2900 printf("%s", win32_blurb);
2901 # endif /* def _WIN_CONSOLE */
2902 #endif /* def _WIN32 */
2905 /* Initialize the CGI subsystem */
2906 cgi_init_error_messages();
2909 * If runnig on unix and without the --nodaemon
2910 * option, become a daemon. I.e. fork, detach
2911 * from tty and get process group leadership
2924 if ( pid < 0 ) /* error */
2929 else if ( pid != 0 ) /* parent */
2934 * must check for errors
2935 * child died due to missing files aso
2938 wpid = waitpid( pid, &status, WNOHANG );
2947 /* Should be more portable, but not as well tested */
2952 #else /* ndef __FreeBSD__ */
2954 #endif /* ndef __FreeBSD__ */
2955 fd = open("/dev/tty", O_RDONLY);
2958 /* no error check here */
2959 ioctl( fd, TIOCNOTTY,0 );
2963 /* FIXME: should close stderr (fd 2) here too, but the test
2965 * and load config file is done in listen_loop() and puts
2966 * some messages on stderr there.
2973 } /* -END- if (!no_daemon) */
2976 * As soon as we have written the PID file, we can switch
2977 * to the user and group ID indicated by the --user option
2983 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
2985 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
2991 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
2993 if (chroot(pw->pw_dir) < 0)
2995 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
2999 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3002 if (setuid(pw->pw_uid))
3004 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3008 char putenv_dummy[64];
3010 strcpy(putenv_dummy, "HOME=/");
3011 if (putenv(putenv_dummy) != 0)
3013 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3016 snprintf(putenv_dummy, 64, "USER=%s", pw->pw_name);
3017 if (putenv(putenv_dummy) != 0)
3019 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3025 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3028 #endif /* defined unix */
3031 /* This will be FALSE unless the command line specified --service
3035 /* Yup, so now we must attempt to establish a connection
3036 * with the service dispatcher. This will only work if this
3037 * process was launched by the service control manager to
3038 * actually run as a service. If this isn't the case, i've
3039 * known it take around 30 seconds or so for the call to return.
3042 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3043 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3045 /* Service has run, and at this point is now being stopped, so just return */
3050 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3052 /* An error occurred. Usually it's because --service was wrongly specified
3053 * and we were unable to connect to the Service Control Dispatcher because
3054 * it wasn't expecting us and is therefore not listening.
3056 * For now, just continue below to call the listen_loop function.
3059 #endif /* def _WIN32 */
3069 /*********************************************************************
3071 * Function : bind_port_helper
3073 * Description : Bind the listen port. Handles logging, and aborts
3077 * 1 : config = Privoxy configuration. Specifies port
3080 * Returns : Port that was opened.
3082 *********************************************************************/
3083 static jb_socket bind_port_helper(struct configuration_spec * config)
3088 if ( (config->haddr != NULL)
3089 && (config->haddr[0] == '1')
3090 && (config->haddr[1] == '2')
3091 && (config->haddr[2] == '7')
3092 && (config->haddr[3] == '.') )
3094 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
3097 else if (config->haddr == NULL)
3099 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3104 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3105 config->hport, config->haddr);
3108 result = bind_port(config->haddr, config->hport, &bfd);
3115 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3116 "There may be another Privoxy or some other "
3117 "proxy running on port %d",
3118 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
3119 config->hport, config->hport);
3122 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3123 "The hostname is not resolvable",
3124 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3127 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
3128 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3131 /* shouldn't get here */
3132 return JB_INVALID_SOCKET;
3135 config->need_bind = 0;
3142 /* Without this simple workaround we get this compiler warning from _beginthread
3143 * warning C4028: formal parameter 1 different from declaration
3145 void w32_service_listen_loop(void *p)
3149 #endif /* def _WIN32 */
3152 /*********************************************************************
3154 * Function : listen_loop
3156 * Description : bind the listen port and enter a "FOREVER" listening loop.
3162 *********************************************************************/
3163 static void listen_loop(void)
3165 struct client_state *csp = NULL;
3167 struct configuration_spec * config;
3169 config = load_config();
3171 bfd = bind_port_helper(config);
3173 #ifdef FEATURE_GRACEFUL_TERMINATION
3174 while (!g_terminate)
3179 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
3180 while (waitpid(-1, NULL, WNOHANG) > 0)
3182 /* zombie children */
3184 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
3187 * Free data that was used by died threads
3193 * Re-open the errlog after HUP signal
3195 if (received_hup_signal)
3197 init_error_log(Argv[0], config->logfile, config->debug);
3198 received_hup_signal = 0;
3203 #ifdef FEATURE_COOKIE_JAR
3205 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
3206 * already open. I think unload_configfile() is not being run, which should do
3207 * this work. Until that can get resolved, we'll use this workaround.
3211 if (csp->config->jar)
3213 fclose(csp->config->jar);
3214 csp->config->jar = NULL;
3216 #endif /* FEATURE_COOKIE_JAR */
3217 #endif /* __OS2__ */
3219 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
3221 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
3225 csp->flags |= CSP_FLAG_ACTIVE;
3226 csp->sfd = JB_INVALID_SOCKET;
3228 csp->config = config = load_config();
3230 if ( config->need_bind )
3233 * Since we were listening to the "old port", we will not see
3234 * a "listen" param change until the next IJB request. So, at
3235 * least 1 more request must be made for us to find the new
3236 * setting. I am simply closing the old socket and binding the
3239 * Which-ever is correct, we will serve 1 more page via the
3240 * old settings. This should probably be a "show-proxy-args"
3241 * request. This should not be a so common of an operation
3242 * that this will hurt people's feelings.
3247 bfd = bind_port_helper(config);
3250 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
3252 if (!accept_connection(csp, bfd))
3254 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
3267 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
3270 #ifdef FEATURE_TOGGLE
3271 if (global_toggle_state)
3273 csp->flags |= CSP_FLAG_TOGGLED_ON;
3275 #endif /* def FEATURE_TOGGLE */
3277 if (run_loader(csp))
3279 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
3280 /* Never get here - LOG_LEVEL_FATAL causes program exit */
3284 if (block_acl(NULL,csp))
3286 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
3287 close_socket(csp->cfd);
3291 #endif /* def FEATURE_ACL */
3293 /* add it to the list of clients */
3294 csp->next = clients->next;
3295 clients->next = csp;
3297 if (config->multi_threaded)
3301 /* this is a switch () statment in the C preprocessor - ugh */
3302 #undef SELECTED_ONE_OPTION
3304 /* Use Pthreads in preference to native code */
3305 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
3306 #define SELECTED_ONE_OPTION
3308 pthread_t the_thread;
3309 pthread_attr_t attrs;
3311 pthread_attr_init(&attrs);
3312 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
3313 errno = pthread_create(&the_thread, &attrs,
3314 (void * (*)(void *))serve, csp);
3315 child_id = errno ? -1 : 0;
3316 pthread_attr_destroy(&attrs);
3320 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
3321 #define SELECTED_ONE_OPTION
3322 child_id = _beginthread(
3323 (void (*)(void *))serve,
3328 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
3329 #define SELECTED_ONE_OPTION
3330 child_id = _beginthread(
3331 (void(* _Optlink)(void*))serve,
3337 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
3338 #define SELECTED_ONE_OPTION
3340 thread_id tid = spawn_thread
3341 (server_thread, "server", B_NORMAL_PRIORITY, csp);
3343 if ((tid >= 0) && (resume_thread(tid) == B_OK))
3345 child_id = (int) tid;
3354 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
3355 #define SELECTED_ONE_OPTION
3356 csp->cfd = ReleaseSocket(csp->cfd, -1);
3359 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3360 NP_Output, Output(),
3361 NP_CloseOutput, FALSE,
3362 NP_Name, (ULONG)"privoxy child",
3366 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3367 NP_Output, Output(),
3368 NP_CloseOutput, FALSE,
3369 NP_Name, (ULONG)"privoxy child",
3370 NP_StackSize, 200*1024,
3376 ((struct Task *)child_id)->tc_UserData = csp;
3377 Signal((struct Task *)child_id, SIGF_SINGLE);
3382 #if !defined(SELECTED_ONE_OPTION)
3385 /* This block is only needed when using fork().
3386 * When using threads, the server thread was
3387 * created and run by the call to _beginthread().
3389 if (child_id == 0) /* child */
3392 #ifdef FEATURE_TOGGLE
3393 int inherited_toggle_state = global_toggle_state;
3394 #endif /* def FEATURE_TOGGLE */
3399 * If we've been toggled or we've blocked the request, tell Mom
3402 #ifdef FEATURE_TOGGLE
3403 if (inherited_toggle_state != global_toggle_state)
3405 rc |= RC_FLAG_TOGGLED;
3407 #endif /* def FEATURE_TOGGLE */
3409 #ifdef FEATURE_STATISTICS
3410 if (csp->flags & CSP_FLAG_REJECTED)
3412 rc |= RC_FLAG_BLOCKED;
3414 #endif /* ndef FEATURE_STATISTICS */
3418 else if (child_id > 0) /* parent */
3420 /* in a fork()'d environment, the parent's
3421 * copy of the client socket and the CSP
3425 #if !defined(_WIN32) && !defined(__CYGWIN__)
3427 wait( &child_status );
3430 * Evaluate child's return code: If the child has
3431 * - been toggled, toggle ourselves
3432 * - blocked its request, bump up the stats counter
3435 #ifdef FEATURE_TOGGLE
3436 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
3438 global_toggle_state = !global_toggle_state;
3440 #endif /* def FEATURE_TOGGLE */
3442 #ifdef FEATURE_STATISTICS
3444 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
3448 #endif /* def FEATURE_STATISTICS */
3450 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
3451 close_socket(csp->cfd);
3452 csp->flags &= ~CSP_FLAG_ACTIVE;
3456 #undef SELECTED_ONE_OPTION
3457 /* end of cpp switch () */
3459 if (child_id < 0) /* failed */
3461 char buf[BUFFER_SIZE];
3463 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
3465 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
3467 write_socket(csp->cfd, buf, strlen(buf));
3468 close_socket(csp->cfd);
3469 csp->flags &= ~CSP_FLAG_ACTIVE;
3480 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
3482 /* Clean up. Aim: free all memory (no leaks) */
3483 #ifdef FEATURE_GRACEFUL_TERMINATION
3485 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
3487 unload_current_config_file();
3488 unload_current_actions_file();
3489 unload_current_re_filterfile();
3490 #ifdef FEATURE_TRUST
3491 unload_current_trust_file();
3494 if (config->multi_threaded)
3501 } while ((clients->next != NULL) && (--i > 0));
3505 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
3516 #ifdef FEATURE_COOKIE_JAR
3517 if (NULL != config->jar)
3519 fclose(config->jar);
3523 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
3524 /* Cleanup - remove taskbar icon etc. */
3529 #endif /* FEATURE_GRACEFUL_TERMINATION */