1 const char jcc_rcs[] = "$Id: jcc.c,v 1.131 2007/04/22 13:24:50 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 1.131 2007/04/22 13:24:50 fabiankeil
37 * Make HTTP snippets static (again). Add a Content-Type for those
38 * with content so the browser doesn't guess it based on the URL.
40 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
41 * Move crunching and request line rebuilding out of chat().
43 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
44 * Introduce tags as alternative way to specify which
45 * actions apply to a request. At the moment tags can be
46 * created based on client and server headers.
48 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
49 * Don't CLF-log CONNECT requests twice.
51 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
52 * Log the source address for ACL-related connection drops.
54 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
55 * New config option: enforce-blocks.
57 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
58 * - Move null byte check into separate function.
59 * - Don't confuse the client with error pages
60 * if a CONNECT request was already confirmed.
62 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
63 * Speed up NULL byte escaping and only log the complete
64 * NULL byte requests with header debugging enabled.
66 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
67 * Answer requests that contain NULL bytes with
68 * a custom response instead of waiting for more
69 * data until the client eventually hangs up.
71 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
72 * - Move delivery and logging of crunched responses
73 * from chat() into send_crunch_response().
74 * - Display the reason for generating http_responses.
75 * - Log the content length for LOG_LEVEL_CLF correctly
76 * (still incorrect for some fixed responses).
77 * - Reword an incorrect comment about
78 * treat-forbidden-connects-like-blocks violating
80 * - Add some log messages.
82 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
83 * Move mutex initialization into separate
84 * function and exit in case of errors.
86 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
87 * - Start to reduce chat()'s line count and move
88 * parts of it into separate functions.
89 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
91 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
92 * - Add Proxy-Agent header to HTTP snippets that are
93 * supposed to reach HTTP clients only.
94 * - Made a few CONNECT log messages more descriptive.
95 * - Catch completely empty server responses (as seen
96 * with Tor's fake ".noconnect" top level domain).
97 * - Use shiny new "forwarding-failed" template for socks errors.
99 * Revision 1.118 2007/01/07 07:43:43 joergs
100 * AmigaOS4 support added.
102 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
103 * Added config option accept-intercepted-requests
104 * and disabled it by default.
106 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
107 * Reverted parts of my last commit
108 * to keep error handling working.
110 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
111 * Fixed gcc43 conversion warnings.
113 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
114 * Fix -pedantic ISO C warning about converting
115 * from function pointer to object pointer.
117 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
118 * Silence compiler warning I introduced with my last commit.
120 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
121 * Mutex protect rand() if POSIX threading
122 * is used, warn the user if that's not possible
123 * and stop using it on _WIN32 where it could
126 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
127 * Don't prevent core dumps by catching SIGABRT.
128 * It's rude and makes debugging unreasonable painful.
130 * Revision 1.110 2006/12/13 14:52:53 etresoft
131 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
133 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
134 * Privoxy is now able to run as intercepting
135 * proxy in combination with any packet filter
136 * that does the port redirection. The destination
137 * is extracted from the "Host:" header which
138 * should be available for nearly all requests.
140 * Moved HTTP snipplets into jcc.c.
141 * Added error message for gopher proxy requests.
143 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
144 * Only unlink the pidfile if it's actually used.
146 * Change order of interception checks to make
147 * it possible to block or redirect requests for
150 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
151 * Make pthread mutex locking more generic. Instead of
152 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
153 * and use mutex locking unless there is an _r function
154 * available. Better safe than sorry.
156 * Fixes "./configure --disable-pthread" and should result
157 * in less threading-related problems on pthread-using platforms,
158 * but it still doesn't fix BR#1122404.
160 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
161 * Move pthread.h inclusion from jcc.c to jcc.h.
162 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
164 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
165 * Don't exit after receiving the second SIGHUP on Solaris.
167 * Fixes BR 1052235, but the same problem may exist on other
168 * systems. Once 3.0.6 is out we should use sigset()
169 * where available and see if it breaks anything.
171 * Revision 1.104 2006/09/23 13:26:38 roro
172 * Replace TABs by spaces in source code.
174 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
175 * Fix +redirect{}. Didn't work with -fast-redirects.
177 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
178 * Respond with 400 and a short text message
179 * if the client tries to use Privoxy as FTP proxy.
181 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
182 * Make number of retries in case of forwarded-connect problems
183 * a config file option (forwarded-connect-retries) and use 0 as
186 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
187 * Set random(3) seed.
189 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
190 * Follow the OpenBSD port's lead and protect the resolve
191 * functions on OpenBSD as well.
193 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
194 * --user fix. Only use the user as group if no group is specified.
195 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
197 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
198 * Windows service (re-)integration
202 * --install[:service_name]
203 * --uninstall[:service_name]
206 * They work as follows:
207 * --install will create a service for you and then terminate.
208 * By default the service name will be "privoxy" (without the quotes).
209 * However you can run multiple services if you wish, just by adding
210 * a colon and then a name (no spaces).
212 * --uninstall follows the exact same rules a --install.
214 * --service is used when the program is executed by the service
215 * control manager, and in normal circumstances would never be
216 * used as a command line argument.
218 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
219 * Windows service integration
221 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
222 * Incorporate Fabian Keil's patch work:
223 http://www.fabiankeil.de/sourcecode/privoxy/
225 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
226 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
227 * with what was really the latest development (the v_3_0_branch branch)
229 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
230 * Thanks to Jindrich Makovicka for a race condition fix for the log
231 * file. The race condition remains for non-pthread implementations.
232 * Reference patch #1175720.
234 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
235 * Add the ability to check jpeg images for invalid
236 * lengths of comment blocks. Defensive strategy
237 * against the exploit:
238 * Microsoft Security Bulletin MS04-028
239 * Buffer Overrun in JPEG Processing (GDI+) Could
240 * Allow Code Execution (833987)
241 * Enabled with +inspect-jpegs in actions files.
243 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
244 * - Fixed usage info for non-unix platforms
245 * - Fixed small cmdline parsing bug
247 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
248 * Diagnostics: Now preserve the returncode of pthread_create
249 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
251 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
252 * No longer ignore SIGCHLD. Fixes bug #769381
254 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
255 * Close jarfile on graceful exit, remove stray line
257 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
258 * Cosmetics: Killed a warning, a typo and an allocation left at exit
260 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
261 * No longer rely on non-POSIX.1 extensions of getcwd().
264 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
265 * Replaced setenv() by posix-compliant putenv()
266 * Thanks to Neil McCalden (nmcc AT users.sf.net).
268 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
269 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
271 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
272 * Clean-up and extension of improvements for forked mode:
273 * - Child's return code now consists of flags RC_FLAG_*
274 * - Reporting toggle to parent now properly #ifdef'ed
275 * - Children now report blocking to parent. This enables
276 * statistics in forked mode
278 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
279 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
280 * Children now report having been toggled through _exit(17), parents
281 * watch for that code and toggle themselves if found.
283 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
284 * Wrapping all *_r functions (the non-_r versions of them) with
285 * mutex semaphores for OSX. Hopefully this will take care of all
286 * of those pesky crash reports.
288 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
289 * Fixed two mostly harmless mem leaks
291 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
292 * Fix: Head of global clients list now initialized to NULL
294 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
295 * Added basic support for OPTIONS and TRACE HTTP methods:
296 * - New interceptor direct_response() added in chat().
297 * - sed() moved to earlier in the process, so that the
298 * Host: header is evaluated before actions and forwarding
301 * Revision 1.92 2002/05/08 16:00:46 oes
302 * Chat's buffer handling:
303 * - Fixed bug with unchecked out-of-mem conditions
304 * while reading client request & server headers
305 * - No longer predict if the buffer limit will be exceeded
306 * in the next read -- check add_to_iob's new
307 * return code. If buffer couldn't be extended
308 * (policy or out-of-mem) while
309 * - reading from client: abort
310 * - reading server headers: send error page
311 * - buffering server body for filter: flush,
312 * and if that fails: send error page
314 * Revision 1.91 2002/04/08 20:35:58 swa
317 * Revision 1.90 2002/04/02 14:57:28 oes
318 * Made sending wafers independent of FEATURE_COOKIE_JAR
320 * Revision 1.89 2002/03/31 17:18:59 jongfoster
321 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
323 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
324 * More compiler warning message maintenance
326 * Revision 1.87 2002/03/26 22:29:54 swa
327 * we have a new homepage!
329 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
330 * Workaround for closing the jarfile before load_config() comes around again
332 * Revision 1.85 2002/03/24 15:23:33 jongfoster
335 * Revision 1.84 2002/03/24 13:25:43 swa
336 * name change related issues
338 * Revision 1.83 2002/03/16 23:54:06 jongfoster
339 * Adding graceful termination feature, to help look for memory leaks.
340 * If you enable this (which, by design, has to be done by hand
341 * editing config.h) and then go to http://i.j.b/die, then the program
342 * will exit cleanly after the *next* request. It should free all the
343 * memory that was used.
345 * Revision 1.82 2002/03/13 00:27:05 jongfoster
348 * Revision 1.81 2002/03/12 01:42:50 oes
349 * Introduced modular filters
351 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
352 * OS/2 port maintenance:
353 * - Fixed EMX build - it had decayed a little
354 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
355 * substituted a memset for now.
357 * Revision 1.79 2002/03/09 20:03:52 jongfoster
358 * - Making various functions return int rather than size_t.
359 * (Undoing a recent change). Since size_t is unsigned on
360 * Windows, functions like read_socket that return -1 on
361 * error cannot return a size_t.
363 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
364 * crashes, and also frequently caused JB to jump to 100%
365 * CPU and stay there. (Because it thought it had just
366 * read ((unsigned)-1) == 4Gb of data...)
368 * - The signature of write_socket has changed, it now simply
369 * returns success=0/failure=nonzero.
371 * - Trying to get rid of a few warnings --with-debug on
372 * Windows, I've introduced a new type "jb_socket". This is
373 * used for the socket file descriptors. On Windows, this
374 * is SOCKET (a typedef for unsigned). Everywhere else, it's
375 * an int. The error value can't be -1 any more, so it's
376 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
377 * Windows it maps to the #define INVALID_SOCKET.)
379 * - The signature of bind_port has changed.
381 * Revision 1.78 2002/03/08 21:35:04 oes
382 * Added optional group supplement to --user option. Will now use default group of user if no group given
384 * Revision 1.77 2002/03/07 03:52:06 oes
385 * - Fixed compiler warnings etc
386 * - Improved handling of failed DNS lookups
388 * Revision 1.76 2002/03/06 22:54:35 jongfoster
389 * Automated function-comment nitpicking.
391 * Revision 1.75 2002/03/06 10:02:19 oes
392 * Fixed stupid bug when --user was not given
394 * Revision 1.74 2002/03/06 00:49:31 jongfoster
395 * Fixing warning on Windows
396 * Making #ifdefs that refer to the same variable consistently
397 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
399 * Revision 1.73 2002/03/05 23:57:30 hal9
400 * Stray character 's' on line 1618 was breaking build.
402 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
403 * - Re-enable OS/2 building after new parms were added
404 * - Fix false out of memory report when resolving CGI templates when no IP
405 * address is available of failed attempt (a la no such domain)
407 * Revision 1.71 2002/03/05 18:13:56 oes
408 * Added --user option
410 * Revision 1.70 2002/03/05 04:52:42 oes
411 * Deleted non-errlog debugging code
413 * Revision 1.69 2002/03/04 23:50:00 jongfoster
414 * Splitting off bind_port() call into bind_port_helper(), with
417 * Revision 1.68 2002/03/04 20:17:32 oes
420 * Revision 1.67 2002/03/04 18:18:57 oes
421 * - Removed _DEBUG mode
422 * - Cleand up cmdline parsing
423 * - Introduced --no-daemon, --pidfile options
424 * - Cleaned up signal handling:
425 * - Terminate cleanly on INT, TERM and ABRT
426 * - Schedule logfile for re-opening on HUP
427 * - Ignore CHLD and PIPE
428 * - Leave the rest with their default handlers
429 * - Uniform handler registration
430 * - Added usage() function
431 * - Played styleguide police
433 * Revision 1.66 2002/03/03 15:06:55 oes
434 * Re-enabled automatic config reloading
436 * Revision 1.65 2002/03/03 14:49:11 oes
437 * Fixed CLF logging: Now uses client's original HTTP request
439 * Revision 1.64 2002/03/03 09:18:03 joergs
440 * Made jumbjuster work on AmigaOS again.
442 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
443 * Clean up a little CRLF unpleasantness that suddenly appeared
445 * Revision 1.62 2002/02/20 23:17:23 jongfoster
446 * Detecting some out-of memory conditions and exiting with a log message.
448 * Revision 1.61 2002/01/17 21:01:52 jongfoster
449 * Moving all our URL and URL pattern parsing code to urlmatch.c.
451 * Revision 1.60 2001/12/30 14:07:32 steudten
452 * - Add signal handling (unix)
453 * - Add SIGHUP handler (unix)
454 * - Add creation of pidfile (unix)
455 * - Add action 'top' in rc file (RH)
456 * - Add entry 'SIGNALS' to manpage
457 * - Add exit message to logfile (unix)
459 * Revision 1.59 2001/12/13 14:07:18 oes
460 * Fixed Bug: 503 error page now sent OK
462 * Revision 1.58 2001/11/30 23:37:24 jongfoster
463 * Renaming the Win32 config file to config.txt - this is almost the
464 * same as the corresponding UNIX name "config"
466 * Revision 1.57 2001/11/16 00:47:43 jongfoster
467 * Changing the tty-disconnection code to use setsid().
469 * Revision 1.56 2001/11/13 20:20:54 jongfoster
470 * Tabs->spaces, fixing a bug with missing {} around an if()
472 * Revision 1.55 2001/11/13 20:14:53 jongfoster
473 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
475 * Revision 1.54 2001/11/07 00:03:14 steudten
476 * Give reliable return value if an error
477 * occurs not just 0 with new daemon mode.
479 * Revision 1.53 2001/11/05 21:41:43 steudten
480 * Add changes to be a real daemon just for unix os.
481 * (change cwd to /, detach from controlling tty, set
482 * process group and session leader to the own process.
484 * Add some fatal-error log message for failed malloc().
485 * Add '-d' if compiled with 'configure --with-debug' to
486 * enable debug output.
488 * Revision 1.52 2001/10/26 20:11:20 jongfoster
489 * Fixing type mismatch
491 * Revision 1.51 2001/10/26 17:38:28 oes
494 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
495 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
496 * threads to call select() simultaneously. So, it's time to do a real, live,
497 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
498 * (native). Both versions will work, but using __OS2__ offers multi-threading.
500 * Revision 1.49 2001/10/23 21:41:35 jongfoster
501 * Added call to initialize the (statically-allocated of course)
502 * "out of memory" CGI response.
504 * Revision 1.48 2001/10/10 19:56:46 jongfoster
505 * Moving some code that wasn't cookie-related out of an #ifdef
508 * Revision 1.47 2001/10/10 16:44:36 oes
509 * Added CONNECT destination port limitation check
511 * Revision 1.46 2001/10/08 15:17:41 oes
512 * Re-enabled SSL forwarding
514 * Revision 1.45 2001/10/07 15:42:11 oes
515 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
517 * Moved downgrading of the HTTP version from parse_http_request to
518 * chat(), since we can't decide if it is necessary before we have
519 * determined the actions for the URL. The HTTP command is now
520 * *always* re-built so the repairs need no longer be special-cased.
522 * filter_popups now gets a csp pointer so it can raise the new
523 * CSP_FLAG_MODIFIED flag.
527 * Added configurable size limit for the IOB. If the IOB grows so
528 * large that the next read would exceed the limit, the header
529 * is generated, and the header & unfiltered buffer are flushed
530 * to the client. Chat then continues in non-buffering,
531 * non-filtering body mode.
533 * Revision 1.44 2001/10/02 18:13:57 oes
536 * Revision 1.43 2001/10/02 15:32:13 oes
537 * Moved generation of hdr
539 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
540 * Cleaning up 2 compiler warnings on OS/2.
542 * Revision 1.41 2001/09/16 17:05:14 jongfoster
543 * Removing unused #include showarg.h
545 * Revision 1.40 2001/09/16 15:41:45 jongfoster
546 * Fixing signed/unsigned comparison warning.
548 * Revision 1.39 2001/09/16 13:21:27 jongfoster
549 * Changes to use new list functions.
551 * Revision 1.38 2001/09/16 13:01:46 jongfoster
552 * Removing redundant function call that zeroed zalloc()'d memory.
554 * Revision 1.37 2001/09/10 11:12:24 oes
555 * Deleted unused variable
557 * Revision 1.36 2001/09/10 10:56:15 oes
558 * Silenced compiler warnings
560 * Revision 1.35 2001/07/31 14:44:22 oes
561 * Deleted unused size parameter from filter_popups()
563 * Revision 1.34 2001/07/30 22:08:36 jongfoster
564 * Tidying up #defines:
565 * - All feature #defines are now of the form FEATURE_xxx
566 * - Permanently turned off WIN_GUI_EDIT
567 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
569 * Revision 1.33 2001/07/29 19:32:00 jongfoster
570 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
572 * Revision 1.32 2001/07/29 18:47:05 jongfoster
573 * Adding missing #include "loadcfg.h"
575 * Revision 1.31 2001/07/29 12:17:48 oes
576 * Applied pthread fix by Paul Lieverse
578 * Revision 1.30 2001/07/25 22:57:13 jongfoster
579 * __BEOS__ no longer overrides FEATURE_PTHREAD.
580 * This is because FEATURE_PTHREAD will soon be widely used, so I
581 * want to keep it simple.
583 * Revision 1.29 2001/07/24 12:47:06 oes
584 * Applied BeOS support update by Eugenia
586 * Revision 1.28 2001/07/23 13:26:12 oes
587 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
589 * Revision 1.27 2001/07/19 19:09:47 haroon
590 * - Added code to take care of the situation where while processing the first
591 * server response (which includes the server header), after finding the end
592 * of the headers we were not looking past the end of the headers for
593 * content modification. I enabled it for filter_popups.
594 * Someone else should look to see if other similar operations should be
595 * done to the discarded portion of the buffer.
597 * Note 2001/07/20: No, the other content modification mechanisms will process
598 * the whole iob later anyway. --oes
600 * Revision 1.26 2001/07/18 12:31:36 oes
603 * Revision 1.25 2001/07/15 19:43:49 jongfoster
604 * Supports POSIX threads.
605 * Also removed some unused #includes.
607 * Revision 1.24 2001/07/13 14:00:40 oes
608 * - Generic content modification scheme:
609 * Each feature has its own applicability flag that is set
610 * from csp->action->flags.
611 * Replaced the "filtering" int flag , by a function pointer
612 * "content_filter" to the function that will do the content
613 * modification. If it is != NULL, the document will be buffered
614 * and processed through *content_filter, which must set
615 * csp->content_length and return a modified copy of the body
616 * or return NULL (on failiure).
617 * - Changed csp->is_text to the more generic bitmap csp->content_type
618 * which can currently take the valued CT_TEXT or CT_GIF
620 * - Removed all #ifdef PCRS
622 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
623 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
624 * the `block_acl' call. This prevents a compilation error when the user
625 * does not wish to use the "ACL" feature.
627 * Revision 1.22 2001/06/29 21:45:41 oes
628 * Indentation, CRLF->LF, Tab-> Space
630 * Revision 1.21 2001/06/29 13:29:36 oes
631 * - Cleaned up, improved comments
632 * - Unified all possible interceptors (CGI,
633 * block, trust, fast_redirect) in one
634 * place, with one (CGI) answer generation
635 * mechansim. Much clearer now.
636 * - Removed the GIF image generation, which
637 * is now done in filters.c:block_url()
638 * - Made error conditions like domain lookup
639 * failiure or (various) problems while talking
640 * to the server use cgi.c:error_response()
641 * instead of generating HTML/HTTP in chat() (yuck!)
642 * - Removed logentry from cancelled commit
644 * Revision 1.20 2001/06/09 10:55:28 jongfoster
645 * Changing BUFSIZ ==> BUFFER_SIZE
647 * Revision 1.19 2001/06/07 23:12:52 jongfoster
648 * Replacing function pointer in struct gateway with a directly
649 * called function forwarded_connect().
650 * Replacing struct gateway with struct forward_spec
652 * Revision 1.18 2001/06/03 19:12:16 oes
653 * introduced new cgi handling
655 * Revision 1.17 2001/06/01 20:07:23 jongfoster
656 * Now uses action +image-blocker{} rather than config->tinygif
658 * Revision 1.16 2001/06/01 18:49:17 jongfoster
659 * Replaced "list_share" with "list" - the tiny memory gain was not
660 * worth the extra complexity.
662 * Revision 1.15 2001/05/31 21:24:47 jongfoster
663 * Changed "permission" to "action" throughout.
664 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
665 * Moved vanilla wafer check into chat(), since we must now
666 * decide whether or not to add it based on the URL.
668 * Revision 1.14 2001/05/29 20:14:01 joergs
669 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
672 * Revision 1.13 2001/05/29 09:50:24 jongfoster
673 * Unified blocklist/imagelist/permissionslist.
674 * File format is still under discussion, but the internal changes
677 * Also modified interceptor behaviour:
678 * - We now intercept all URLs beginning with one of the following
679 * prefixes (and *only* these prefixes):
681 * * http://ijbswa.sf.net/config/
682 * * http://ijbswa.sourceforge.net/config/
683 * - New interceptors "home page" - go to http://i.j.b/ to see it.
684 * - Internal changes so that intercepted and fast redirect pages
685 * are not replaced with an image.
686 * - Interceptors now have the option to send a binary page direct
687 * to the client. (i.e. ijb-send-banner uses this)
688 * - Implemented show-url-info interceptor. (Which is why I needed
689 * the above interceptors changes - a typical URL is
690 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
691 * The previous mechanism would not have intercepted that, and
692 * if it had been intercepted then it then it would have replaced
695 * Revision 1.12 2001/05/27 22:17:04 oes
697 * - re_process_buffer no longer writes the modified buffer
698 * to the client, which was very ugly. It now returns the
699 * buffer, which it is then written by chat.
701 * - content_length now adjusts the Content-Length: header
702 * for modified documents rather than crunch()ing it.
703 * (Length info in csp->content_length, which is 0 for
704 * unmodified documents)
706 * - For this to work, sed() is called twice when filtering.
708 * Revision 1.11 2001/05/26 17:27:53 jongfoster
709 * Added support for CLF and fixed LOG_LEVEL_LOG.
710 * Also did CRLF->LF fix of my previous patch.
712 * Revision 1.10 2001/05/26 15:26:15 jongfoster
713 * ACL feature now provides more security by immediately dropping
714 * connections from untrusted hosts.
716 * Revision 1.9 2001/05/26 00:28:36 jongfoster
717 * Automatic reloading of config file.
718 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
719 * Most of the global variables have been moved to a new
720 * struct configuration_spec, accessed through csp->config->globalname
721 * Most of the globals remaining are used by the Win32 GUI.
723 * Revision 1.8 2001/05/25 22:43:18 jongfoster
724 * Fixing minor memory leak and buffer overflow.
726 * Revision 1.7 2001/05/25 22:34:30 jongfoster
729 * Revision 1.6 2001/05/23 00:13:58 joergs
730 * AmigaOS support fixed.
732 * Revision 1.5 2001/05/22 18:46:04 oes
734 * - Enabled filtering banners by size rather than URL
735 * by adding patterns that replace all standard banner
736 * sizes with the "Junkbuster" gif to the re_filterfile
738 * - Enabled filtering WebBugs by providing a pattern
739 * which kills all 1x1 images
741 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
742 * which is selected by the (nonstandard and therefore
743 * capital) letter 'U' in the option string.
744 * It causes the quantifiers to be ungreedy by default.
745 * Appending a ? turns back to greedy (!).
747 * - Added a new interceptor ijb-send-banner, which
748 * sends back the "Junkbuster" gif. Without imagelist or
749 * MSIE detection support, or if tinygif = 1, or the
750 * URL isn't recognized as an imageurl, a lame HTML
751 * explanation is sent instead.
753 * - Added new feature, which permits blocking remote
754 * script redirects and firing back a local redirect
756 * The feature is conditionally compiled, i.e. it
757 * can be disabled with --disable-fast-redirects,
758 * plus it must be activated by a "fast-redirects"
759 * line in the config file, has its own log level
760 * and of course wants to be displayed by show-proxy-args
761 * Note: Boy, all the #ifdefs in 1001 locations and
762 * all the fumbling with configure.in and acconfig.h
763 * were *way* more work than the feature itself :-(
765 * - Because a generic redirect template was needed for
766 * this, tinygif = 3 now uses the same.
768 * - Moved GIFs, and other static HTTP response templates
773 * - Removed some >400 CRs again (Jon, you really worked
776 * Revision 1.4 2001/05/21 19:34:01 jongfoster
777 * Made failure to bind() a fatal error.
779 * Revision 1.3 2001/05/20 01:21:20 jongfoster
780 * Version 2.9.4 checkin.
781 * - Merged popupfile and cookiefile, and added control over PCRS
782 * filtering, in new "permissionsfile".
783 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
784 * file error you now get a message box (in the Win32 GUI) rather
785 * than the program exiting with no explanation.
786 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
788 * - Removed tabs from "config"
789 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
790 * - Bumped up version number.
792 * Revision 1.2 2001/05/17 22:34:44 oes
793 * - Added hint on GIF char array generation to jcc.c
794 * - Cleaned CRLF's from the sources and related files
795 * - Repaired logging for REF and FRC
797 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
798 * Initial import of version 2.9.3 source tree
801 *********************************************************************/
807 #include <sys/types.h>
816 # ifndef FEATURE_PTHREAD
820 # include <windows.h>
821 # include <process.h>
822 # endif /* ndef FEATURE_PTHREAD */
825 # ifndef _WIN_CONSOLE
827 # endif /* ndef _WIN_CONSOLE */
828 # include "w32svrapi.h"
830 #else /* ifndef _WIN32 */
832 # if !defined (__OS2__)
834 # include <sys/wait.h>
835 # endif /* ndef __OS2__ */
836 # include <sys/time.h>
837 # include <sys/stat.h>
838 # include <sys/ioctl.h>
841 #include <sys/termios.h>
852 # include <socket.h> /* BeOS has select() for sockets only. */
853 # include <OS.h> /* declarations for threads and stuff. */
856 # if defined(__EMX__) || defined(__OS2__)
857 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
862 #define bzero(B,N) memset(B,0x00,n)
877 #include "killpopup.h"
878 #include "miscutil.h"
880 #include "jbsockets.h"
885 #include "urlmatch.h"
887 const char jcc_h_rcs[] = JCC_H_VERSION;
888 const char project_h_rcs[] = PROJECT_H_VERSION;
891 struct client_state clients[1];
892 struct file_list files[1];
894 #ifdef FEATURE_STATISTICS
895 int urls_read = 0; /* total nr of urls read inc rejected */
896 int urls_rejected = 0; /* total nr of urls rejected */
897 #endif /* def FEATURE_STATISTICS */
899 #ifdef FEATURE_GRACEFUL_TERMINATION
903 static void listen_loop(void);
904 static void chat(struct client_state *csp);
906 void serve(struct client_state *csp);
907 #else /* ifndef AMIGA */
908 static void serve(struct client_state *csp);
909 #endif /* def AMIGA */
912 static int32 server_thread(void *data);
913 #endif /* def __BEOS__ */
916 #define sleep(N) Sleep(((N) * 1000))
920 #define sleep(N) DosSleep(((N) * 100))
923 #ifdef FEATURE_PTHREAD
924 pthread_mutex_t log_mutex;
925 pthread_mutex_t log_init_mutex;
927 #ifndef HAVE_GMTIME_R
928 pthread_mutex_t gmtime_mutex;
929 #endif /* ndef HAVE_GMTIME_R */
931 #ifndef HAVE_LOCALTIME_R
932 pthread_mutex_t localtime_mutex;
933 #endif /* ndef HAVE_GMTIME_R */
935 #ifndef HAVE_GETHOSTBYADDR_R
936 pthread_mutex_t gethostbyaddr_mutex;
937 #endif /* ndef HAVE_GETHOSTBYADDR_R */
939 #ifndef HAVE_GETHOSTBYNAME_R
940 pthread_mutex_t gethostbyname_mutex;
941 #endif /* ndef HAVE_GETHOSTBYNAME_R */
944 pthread_mutex_t rand_mutex;
945 #endif /* ndef HAVE_RANDOM */
947 #endif /* FEATURE_PTHREAD */
949 #if defined(unix) || defined(__EMX__)
950 const char *basedir = NULL;
951 const char *pidfile = NULL;
952 int received_hup_signal = 0;
953 #endif /* defined unix */
955 /* The vanilla wafer. */
956 static const char VANILLA_WAFER[] =
957 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
958 "Do_not_send_me_any_copyrighted_information_other_than_the_"
959 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
960 "In_particular_do_not_send_me_any_cookies_that_"
961 "are_subject_to_a_claim_of_copyright_by_anybody._"
962 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
963 "(copyright_or_otherwise)_applying_to_any_cookie._";
965 /* HTTP snipplets. */
966 const static char CSUCCEED[] =
967 "HTTP/1.0 200 Connection established\n"
968 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
970 const static char CHEADER[] =
971 "HTTP/1.0 400 Invalid header received from browser\r\n"
972 "Proxy-Agent: Privoxy " VERSION "\r\n"
973 "Content-Type: text/plain\r\n"
974 "Connection: close\r\n\r\n"
975 "Invalid header received from browser.\r\n";
977 const static char CFORBIDDEN[] =
978 "HTTP/1.0 403 Connection not allowable\r\n"
979 "Proxy-Agent: Privoxy " VERSION "\r\n"
980 "X-Hint: If you read this message interactively, then you know why this happens ,-)\r\n"
981 "Connection: close\r\n\r\n";
983 const static char FTP_RESPONSE[] =
984 "HTTP/1.0 400 Invalid request received from browser\r\n"
985 "Content-Type: text/plain\r\n"
986 "Connection: close\r\n\r\n"
987 "Invalid request. Privoxy doesn't support FTP.\r\n";
989 const static char GOPHER_RESPONSE[] =
990 "HTTP/1.0 400 Invalid request received from browser\r\n"
991 "Content-Type: text/plain\r\n"
992 "Connection: close\r\n\r\n"
993 "Invalid request. Privoxy doesn't support gopher.\r\n";
995 /* XXX: should be a template */
996 const static char MISSING_DESTINATION_RESPONSE[] =
997 "HTTP/1.0 400 Bad request received from browser\r\n"
998 "Proxy-Agent: Privoxy " VERSION "\r\n"
999 "Content-Type: text/plain\r\n"
1000 "Connection: close\r\n\r\n"
1001 "Bad request. Privoxy was unable to extract the destination.\r\n";
1003 /* XXX: should be a template */
1004 const static char NO_SERVER_DATA_RESPONSE[] =
1005 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1006 "Proxy-Agent: Privoxy " VERSION "\r\n"
1007 "Content-Type: text/plain\r\n"
1008 "Connection: close\r\n\r\n"
1009 "Empty server or forwarder response.\r\n"
1010 "The connection was closed without sending any data.\r\n";
1012 /* XXX: should be a template */
1013 const static char NULL_BYTE_RESPONSE[] =
1014 "HTTP/1.0 400 Bad request received from browser\r\n"
1015 "Proxy-Agent: Privoxy " VERSION "\r\n"
1016 "Content-Type: text/plain\r\n"
1017 "Connection: close\r\n\r\n"
1018 "Bad request. Null byte(s) before end of request.\r\n";
1020 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1021 /*********************************************************************
1023 * Function : sig_handler
1025 * Description : Signal handler for different signals.
1026 * Exit gracefully on TERM and INT
1027 * or set a flag that will cause the errlog
1028 * to be reopened by the main thread on HUP.
1031 * 1 : the_signal = the signal cause this function to call
1035 *********************************************************************/
1036 static void sig_handler(int the_signal)
1042 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1053 received_hup_signal = 1;
1058 * We shouldn't be here, unless we catch signals
1059 * in main() that we can't handle here!
1061 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1069 /*********************************************************************
1071 * Function : client_protocol_is_unsupported
1073 * Description : Checks if the client used a known unsupported
1074 * protocol and deals with it by sending an error
1078 * 1 : csp = Current client state (buffers, headers, etc...)
1079 * 2 : req = the first request line send by the client
1081 * Returns : TRUE if an error response has been generated, or
1082 * FALSE if the request doesn't look invalid.
1084 *********************************************************************/
1085 int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1087 char buf[BUFFER_SIZE];
1090 * If it's a FTP or gopher request, we don't support it.
1092 * These checks are better than nothing, but they might
1093 * not work in all configurations and some clients might
1094 * have problems digesting the answer.
1096 * They should, however, never cause more problems than
1097 * Privoxy's old behaviour (returning the misleading HTML
1100 * "Could not resolve http://(ftp|gopher)://example.org").
1102 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1104 if (!strncmpic(req, "GET ftp://", 10))
1106 strcpy(buf, FTP_RESPONSE);
1107 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as FTP proxy: %s",
1108 csp->ip_addr_str, req);
1112 strcpy(buf, GOPHER_RESPONSE);
1113 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as gopher proxy: %s",
1114 csp->ip_addr_str, req);
1116 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1118 write_socket(csp->cfd, buf, strlen(buf));
1127 /*********************************************************************
1129 * Function : get_request_destination_elsewhere
1131 * Description : If the client's request was redirected into
1132 * Privoxy without the client's knowledge,
1133 * the request line lacks the destination host.
1135 * This function tries to get it elsewhere,
1136 * provided accept-intercepted-requests is enabled.
1138 * "Elsewhere" currently only means "Host: header",
1139 * but in the future we may ask the redirecting
1140 * packet filter to look the destination up.
1142 * If the destination stays unknown, an error
1143 * response is send to the client and headers
1144 * are freed so that chat() can return directly.
1147 * 1 : csp = Current client state (buffers, headers, etc...)
1148 * 2 : headers = a header list
1150 * Returns : JB_ERR_OK if the destination is now known, or
1151 * JB_ERR_PARSE if it isn't.
1153 *********************************************************************/
1154 jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1156 char buf[BUFFER_SIZE];
1159 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1161 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1162 " Privoxy isn't configured to accept intercepted requests.",
1163 csp->ip_addr_str, csp->http->cmd);
1164 /* XXX: Use correct size */
1165 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1166 csp->ip_addr_str, csp->http->cmd);
1168 strcpy(buf, CHEADER);
1169 write_socket(csp->cfd, buf, strlen(buf));
1170 destroy_list(headers);
1172 return JB_ERR_PARSE;
1174 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1176 /* Split the domain we just got for pattern matching */
1177 init_domain_components(csp->http);
1183 /* We can't work without destination. Go spread the news.*/
1185 req = list_to_text(headers);
1187 /* XXX: Use correct size */
1188 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1189 csp->ip_addr_str, csp->http->cmd);
1190 log_error(LOG_LEVEL_ERROR,
1191 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1192 csp->ip_addr_str, csp->http->cmd, req);
1195 strcpy(buf, MISSING_DESTINATION_RESPONSE);
1196 write_socket(csp->cfd, buf, strlen(buf));
1197 destroy_list(headers);
1199 return JB_ERR_PARSE;
1202 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1203 * to get the destination IP address, use it as host directly
1204 * or do a reverse DNS lookup first.
1209 /*********************************************************************
1211 * Function : get_server_headers
1213 * Description : Parses server headers in iob and fills them
1214 * into csp->headers so that they can later be
1218 * 1 : csp = Current client state (buffers, headers, etc...)
1220 * Returns : JB_ERR_OK if everything went fine, or
1221 * JB_ERR_PARSE if the headers were incomplete.
1223 *********************************************************************/
1224 jb_err get_server_headers(struct client_state *csp)
1226 int continue_hack_in_da_house = 0;
1229 while (((header = get_header(csp)) != NULL) || continue_hack_in_da_house)
1234 * continue hack in da house. Ignore the ending of
1235 * this head and continue enlisting header lines.
1236 * The reason is described below.
1238 enlist(csp->headers, "");
1239 continue_hack_in_da_house = 0;
1242 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1245 * It's a bodyless continue response, don't
1246 * stop header parsing after reaching it's end.
1248 * As a result Privoxy will concatenate the
1249 * next response's head and parse and deliver
1250 * the headers as if they belonged to one request.
1252 * The client will separate them because of the
1253 * empty line between them.
1255 * XXX: What we're doing here is clearly against
1256 * the intended purpose of the continue header,
1257 * and under some conditions (HTTP/1.0 client request)
1258 * it's a standard violation.
1260 * Anyway, "sort of against the spec" is preferable
1261 * to "always getting confused by Continue responses"
1262 * (Privoxy's behaviour before this hack was added)
1264 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1265 continue_hack_in_da_house = 1;
1267 else if (*header == '\0')
1270 * If the header is empty, but the Continue hack
1271 * isn't active, we can assume that we reached the
1272 * end of the buffer before we hit the end of the
1275 * Inform the caller an let it decide how to handle it.
1277 return JB_ERR_PARSE;
1281 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1284 * XXX: Should we quit the request and return a
1285 * out of memory error page instead?
1287 log_error(LOG_LEVEL_ERROR,
1288 "Out of memory while enlisting server headers. %s lost.",
1298 /*********************************************************************
1300 * Function : crunch_reason
1302 * Description : Translates the crunch reason code into a string.
1305 * 1 : rsp = a http_response
1307 * Returns : A string with the crunch reason or an error description.
1309 *********************************************************************/
1310 const char *crunch_reason(const struct http_response *rsp)
1312 char * reason = NULL;
1314 assert(rsp != NULL);
1317 return "Internal error while searching for crunch reason";
1320 switch (rsp->reason)
1322 case RSP_REASON_UNSUPPORTED:
1323 reason = "Unsupported HTTP feature";
1325 case RSP_REASON_BLOCKED:
1328 case RSP_REASON_UNTRUSTED:
1329 reason = "Untrusted";
1331 case RSP_REASON_REDIRECTED:
1332 reason = "Redirected";
1334 case RSP_REASON_CGI_CALL:
1335 reason = "CGI Call";
1337 case RSP_REASON_NO_SUCH_DOMAIN:
1338 reason = "DNS failure";
1340 case RSP_REASON_FORWARDING_FAILED:
1341 reason = "Forwarding failed";
1343 case RSP_REASON_CONNECT_FAILED:
1344 reason = "Connection failure";
1346 case RSP_REASON_OUT_OF_MEMORY:
1347 reason = "Out of memory (may mask other reasons)";
1350 reason = "No reason recorded";
1358 /*********************************************************************
1360 * Function : send_crunch_response
1362 * Description : Delivers already prepared response for
1363 * intercepted requests, logs the interception
1364 * and frees the response.
1367 * 1 : csp = Current client state (buffers, headers, etc...)
1368 * 1 : rsp = Fully prepared response. Will be freed on exit.
1370 * Returns : Nothing.
1372 *********************************************************************/
1373 void send_crunch_response(struct client_state *csp, struct http_response *rsp)
1375 const struct http_request *http = csp->http;
1376 char status_code[4];
1378 assert(rsp != NULL);
1379 assert(rsp->head != NULL);
1384 * Not supposed to happen. If it does
1385 * anyway, treat it as an unknown error.
1387 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1388 /* return code doesn't matter */
1393 /* If rsp is still NULL, we have serious internal problems. */
1394 log_error(LOG_LEVEL_FATAL,
1395 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1399 * Extract the status code from the actual head
1400 * that was send to the client. It is the only
1401 * way to get it right for all requests, including
1402 * the fixed ones for out-of-memory problems.
1404 * A head starts like this: 'HTTP/1.1 200...'
1408 status_code[0] = rsp->head[9];
1409 status_code[1] = rsp->head[10];
1410 status_code[2] = rsp->head[11];
1411 status_code[3] = '\0';
1413 /* Write the answer to the client */
1414 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1415 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1417 /* There is nothing we can do about it. */
1418 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1421 /* Log that the request was crunched and why. */
1422 log_error(LOG_LEVEL_GPC, "%s%s crunch! (%s)",
1423 http->hostport, http->path, crunch_reason(rsp));
1424 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %d",
1425 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1427 /* Clean up and return */
1428 if (cgi_error_memory() != rsp)
1430 free_http_response(rsp);
1436 /*********************************************************************
1438 * Function : request_contains_null_bytes
1440 * Description : Checks for NULL bytes in the request and sends
1441 * an error message to the client if any were found.
1444 * 1 : csp = Current client state (buffers, headers, etc...)
1445 * 2 : buf = Data from the client's request to check.
1446 * 3 : len = The data length.
1448 * Returns : TRUE if the request contained one or more NULL bytes, or
1451 *********************************************************************/
1452 int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1454 size_t c_len; /* Request lenght when treated as C string */
1456 c_len = strlen(buf);
1461 * Null byte(s) found. Log the request,
1462 * return an error response and hang up.
1464 size_t tmp_len = c_len;
1469 * Replace NULL byte(s) with '°' characters
1470 * so the request can be logged as string.
1471 * XXX: Is there a better replacement character?
1474 tmp_len += strlen(buf+tmp_len);
1475 } while (tmp_len < len);
1477 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1478 "(length=%d, strlen=%d).", csp->ip_addr_str, len, c_len);
1479 log_error(LOG_LEVEL_HEADER,
1480 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1482 strcpy(buf, NULL_BYTE_RESPONSE);
1483 write_socket(csp->cfd, buf, strlen(buf));
1485 /* XXX: Log correct size */
1486 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1495 /*********************************************************************
1497 * Function : crunch_response_triggered
1499 * Description : Checks if the request has to be crunched,
1500 * and delivers the crunch response if necessary.
1503 * 1 : csp = Current client state (buffers, headers, etc...)
1505 * Returns : TRUE if the request was answered with a crunch response
1508 *********************************************************************/
1509 int crunch_response_triggered(struct client_state *csp)
1512 * This next lines are a little ugly, but they simplify the if statements
1513 * below. Basically if TOGGLE, then we want the if to test if the
1514 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
1515 * then we want the if to test for CSP_FLAG_FORCED, else we don't.
1517 #ifdef FEATURE_TOGGLE
1518 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
1519 #else /* ifndef FEATURE_TOGGLE */
1520 # define IS_TOGGLED_ON_AND
1521 #endif /* ndef FEATURE_TOGGLE */
1522 #ifdef FEATURE_FORCE_LOAD
1523 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
1524 #else /* ifndef FEATURE_FORCE_LOAD */
1525 # define IS_NOT_FORCED_AND
1526 #endif /* def FEATURE_FORCE_LOAD */
1528 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
1530 struct http_response *rsp = NULL;
1533 /* We may not forward the request by rfc2616 sect 14.31 */
1534 (NULL != (rsp = direct_response(csp)))
1536 /* or we are enabled and... */
1537 || (IS_ENABLED_AND (
1539 /* ..the request was blocked */
1540 ( NULL != (rsp = block_url(csp)))
1542 /* ..or untrusted */
1543 #ifdef FEATURE_TRUST
1544 || ( NULL != (rsp = trust_url(csp)))
1545 #endif /* def FEATURE_TRUST */
1547 /* ..or a redirect kicked in */
1548 || ( NULL != (rsp = redirect_url(csp)))
1551 * .. or a CGI call was detected and answered.
1553 * This check comes last to give the user the power
1554 * to deny acces to some (or all) of the cgi pages.
1556 || (NULL != (rsp = dispatch_cgi(csp)))
1560 /* Deliver, log and free the interception response. */
1561 send_crunch_response(csp, rsp);
1562 #ifdef FEATURE_STATISTICS
1563 csp->flags |= CSP_FLAG_REJECTED;
1564 #endif /* def FEATURE_STATISTICS */
1573 /*********************************************************************
1575 * Function : build_request_line
1577 * Description : Builds the HTTP request line.
1579 * If a HTTP forwarder is used it expects the whole URL,
1580 * web servers only get the path.
1583 * 1 : csp = Current client state (buffers, headers, etc...)
1584 * 2 : fwd = The forwarding spec used for the request
1586 * Returns : Nothing. Terminates in case of memory problems.
1588 *********************************************************************/
1589 void build_request_line(struct client_state *csp, const struct forward_spec *fwd)
1591 struct http_request *http = csp->http;
1593 assert(http->ssl == 0);
1596 * Downgrade http version from 1.1 to 1.0
1597 * if +downgrade action applies.
1599 if ( (csp->action->flags & ACTION_DOWNGRADE)
1600 && (!strcmpic(http->ver, "HTTP/1.1")))
1603 http->ver = strdup("HTTP/1.0");
1605 if (http->ver == NULL)
1607 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1612 * Rebuild the request line.
1613 * XXX: If a http forwarder is used and the HTTP version
1614 * wasn't downgraded, we don't have to rebuild anything.
1618 http->cmd = strdup(http->gpc);
1619 string_append(&http->cmd, " ");
1621 if (fwd->forward_host)
1623 string_append(&http->cmd, http->url);
1627 string_append(&http->cmd, http->path);
1629 string_append(&http->cmd, " ");
1630 string_append(&http->cmd, http->ver);
1632 if (http->cmd == NULL)
1634 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1636 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", http->cmd);
1640 /*********************************************************************
1644 * Description : Once a connection to the client has been accepted,
1645 * this function is called (via serve()) to handle the
1646 * main business of the communication. When this
1647 * function returns, the caller must close the client
1650 * FIXME: chat is nearly thousand lines long.
1654 * 1 : csp = Current client state (buffers, headers, etc...)
1656 * Returns : Nothing.
1658 *********************************************************************/
1659 static void chat(struct client_state *csp)
1661 char buf[BUFFER_SIZE];
1669 int ms_iis5_hack = 0;
1670 size_t byte_count = 0;
1671 int forwarded_connect_retries = 0;
1672 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
1673 const struct forward_spec * fwd;
1674 struct http_request *http;
1675 int len; /* for buffer sizes (and negative error codes) */
1676 #ifdef FEATURE_KILL_POPUPS
1677 int block_popups; /* bool, 1==will block popups */
1678 int block_popups_now = 0; /* bool, 1==currently blocking popups */
1679 #endif /* def FEATURE_KILL_POPUPS */
1681 int pcrs_filter; /* bool, 1==will filter through pcrs */
1682 int gif_deanimate; /* bool, 1==will deanimate gifs */
1683 int jpeg_inspect; /* bool, 1==will inspect jpegs */
1685 /* Function that does the content filtering for the current request */
1686 char *(*content_filter)() = NULL;
1688 /* Skeleton for HTTP response, if we should intercept the request */
1689 struct http_response *rsp;
1691 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1692 struct list header_list;
1693 struct list *headers = &header_list;
1697 memset(buf, 0, sizeof(buf));
1700 * Read the client's request. Note that since we're not using select() we
1701 * could get blocked here if a client connected, then didn't say anything!
1706 len = read_socket(csp->cfd, buf, sizeof(buf)-1);
1708 if (len <= 0) break; /* error! */
1710 if (request_contains_null_bytes(csp, buf, len))
1712 /* NULL bytes found and dealt with, just hang up. */
1717 * If there is no memory left for buffering the
1718 * request, there is nothing we can do but hang up
1720 if (add_to_iob(csp, buf, len))
1725 req = get_header(csp);
1729 break; /* no HTTP request! */
1734 continue; /* more to come! */
1737 /* Does the request line look invalid? */
1738 if (client_protocol_is_unsupported(csp, req))
1741 * Yes. The request has already been
1742 * answered with a error response, the buffers
1743 * were freed and we're done with chatting.
1748 #ifdef FEATURE_FORCE_LOAD
1750 * If this request contains the FORCE_PREFIX and blocks
1751 * aren't enforced, get rid of it and set the force flag.
1753 if (strstr(req, FORCE_PREFIX))
1755 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
1757 log_error(LOG_LEVEL_FORCE,
1758 "Ignored force prefix in request: \"%s\".", req);
1762 strclean(req, FORCE_PREFIX);
1763 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
1764 csp->flags |= CSP_FLAG_FORCED;
1768 #endif /* def FEATURE_FORCE_LOAD */
1770 switch( parse_http_request(req, http, csp) )
1773 log_error(LOG_LEVEL_ERROR, "Out of memory while parsing request.");
1776 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", req);
1784 if (http->cmd == NULL)
1786 strcpy(buf, CHEADER);
1787 write_socket(csp->cfd, buf, strlen(buf));
1788 /* XXX: Use correct size */
1789 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1790 log_error(LOG_LEVEL_ERROR, "Invalid header received from %s.", csp->ip_addr_str);
1792 free_http_request(http);
1796 /* grab the rest of the client's headers */
1800 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1802 len = read_socket(csp->cfd, buf, sizeof(buf));
1805 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1810 * If there is no memory left for buffering the
1811 * request, there is nothing we can do but hang up
1813 if (add_to_iob(csp, buf, len))
1820 if (p == NULL) break;
1827 if (http->host == NULL)
1830 * If we still don't know the request destination,
1831 * the request is invalid or the client uses
1832 * Privoxy without its knowledge.
1834 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
1837 * Our attempts to get the request destination
1838 * elsewhere failed or Privoxy is configured
1839 * to only accept proxy requests.
1841 * An error response has already been send
1842 * and we're done here.
1848 /* decide how to route the HTTP request */
1850 if ((fwd = forward_url(http, csp)) == NULL)
1852 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1853 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1856 /* build the http request to send to the server
1857 * we have to do one of the following:
1859 * create = use the original HTTP request to create a new
1860 * HTTP request that has either the path component
1861 * without the http://domainspec (w/path) or the
1862 * full orininal URL (w/url)
1863 * Note that the path and/or the HTTP version may
1864 * have been altered by now.
1866 * connect = Open a socket to the host:port of the server
1867 * and short-circuit server and client socket.
1869 * pass = Pass the request unchanged if forwarding a CONNECT
1870 * request to a parent proxy. Note that we'll be sending
1871 * the CFAIL message ourselves if connecting to the parent
1872 * fails, but we won't send a CSUCCEED message if it works,
1873 * since that would result in a double message (ours and the
1874 * parent's). After sending the request to the parent, we simply
1877 * here's the matrix:
1880 * +--------+--------+
1882 * 0 | create | connect|
1884 * Forwarding +--------+--------+
1886 * 1 | create | pass |
1888 * +--------+--------+
1893 * Determine the actions for this URL
1895 #ifdef FEATURE_TOGGLE
1896 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1898 /* Most compatible set of actions (i.e. none) */
1899 init_current_action(csp->action);
1902 #endif /* ndef FEATURE_TOGGLE */
1904 url_actions(http, csp);
1909 * Check if a CONNECT request is allowable:
1910 * In the absence of a +limit-connect action, allow only port 443.
1911 * If there is an action, allow whatever matches the specificaton.
1915 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
1916 || (csp->action->flags & ACTION_LIMIT_CONNECT
1917 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
1919 if (csp->action->flags & ACTION_TREAT_FORBIDDEN_CONNECTS_LIKE_BLOCKS)
1922 * The response may confuse some clients,
1923 * but makes unblocking easier.
1925 log_error(LOG_LEVEL_ERROR, "Marking suspicious CONNECT request from %s for blocking.",
1927 csp->action->flags |= ACTION_BLOCK;
1932 strcpy(buf, CFORBIDDEN);
1933 write_socket(csp->cfd, buf, strlen(buf));
1934 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
1935 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
1943 * Save a copy of the original request for logging
1945 http->ocmd = strdup(http->cmd);
1947 if (http->ocmd == NULL)
1949 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
1953 * (Re)build the HTTP request for non-SSL requests.
1957 build_request_line(csp, fwd);
1959 enlist(csp->headers, http->cmd);
1961 /* Append the previously read headers */
1962 list_append_list_unique(csp->headers, headers);
1963 destroy_list(headers);
1966 * If the user has not supplied any wafers, and the user has not
1967 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1969 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1970 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1972 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1975 hdr = sed(client_patterns, add_client_headers, csp);
1978 /* FIXME Should handle error properly */
1979 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1981 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
1983 #ifdef FEATURE_KILL_POPUPS
1984 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
1985 #endif /* def FEATURE_KILL_POPUPS */
1987 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
1988 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
1990 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
1992 jpeg_inspect = ((csp->action->flags & ACTION_JPEG_INSPECT) != 0);
1995 * We have a request. Check if one of the crunchers wants it.
1997 if (crunch_response_triggered(csp))
2000 * Yes. The client got the crunch response
2001 * and we are done here after cleaning up.
2004 list_remove_all(csp->headers);
2010 * The headers can't be removed earlier because
2011 * they were still needed for the referrer check
2012 * in case of CGI crunches.
2014 * XXX: Would it be worth to move the referrer check
2015 * into client_referrer() and set a flag if it's trusted?
2017 list_remove_all(csp->headers);
2019 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2021 if (fwd->forward_host)
2023 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2024 fwd->forward_host, fwd->forward_port, http->hostport);
2028 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2031 /* here we connect to the server, gateway, or the forwarder */
2033 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
2034 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2036 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
2037 forwarded_connect_retries, http->hostport);
2040 if (csp->sfd == JB_INVALID_SOCKET)
2042 if (fwd->type != SOCKS_NONE)
2045 rsp = error_response(csp, "forwarding-failed", errno);
2047 else if (errno == EINVAL)
2049 rsp = error_response(csp, "no-such-domain", errno);
2053 rsp = error_response(csp, "connect-failed", errno);
2054 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2059 /* Write the answer to the client */
2062 send_crunch_response(csp, rsp);
2069 if (fwd->forward_host || (http->ssl == 0))
2071 /* write the client's (modified) header to the server
2072 * (along with anything else that may be in the buffer)
2075 if (write_socket(csp->sfd, hdr, strlen(hdr))
2076 || (flush_socket(csp->sfd, csp) < 0))
2078 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
2081 rsp = error_response(csp, "connect-failed", errno);
2085 send_crunch_response(csp, rsp);
2095 * We're running an SSL tunnel and we're not forwarding,
2096 * so just send the "connect succeeded" message to the
2097 * client, flush the rest, and get out of the way.
2099 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
2107 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2109 /* we're finished with the client's header */
2112 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
2114 /* pass data between the client and server
2115 * until one or the other shuts down the connection.
2124 * FD_ZERO here seems to point to an errant macro which crashes.
2125 * So do this by hand for now...
2127 memset(&rfds,0x00,sizeof(fd_set));
2131 FD_SET(csp->cfd, &rfds);
2132 FD_SET(csp->sfd, &rfds);
2134 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
2138 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2142 /* this is the body of the browser's request
2143 * just read it and write it.
2146 if (FD_ISSET(csp->cfd, &rfds))
2148 len = read_socket(csp->cfd, buf, sizeof(buf));
2152 break; /* "game over, man" */
2155 if (write_socket(csp->sfd, buf, (size_t)len))
2157 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2164 * The server wants to talk. It could be the header or the body.
2165 * If `hdr' is null, then it's the header otherwise it's the body.
2166 * FIXME: Does `hdr' really mean `host'? No.
2170 if (FD_ISSET(csp->sfd, &rfds))
2173 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2177 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2179 if (http->ssl && (fwd->forward_host == NULL))
2182 * Just hang up. We already confirmed the client's CONNECT
2183 * request with status code 200 and unencrypted content is
2184 * no longer welcome.
2186 log_error(LOG_LEVEL_ERROR,
2187 "CONNECT already confirmed. Unable to tell the client about the problem.");
2191 rsp = error_response(csp, "connect-failed", errno);
2195 send_crunch_response(csp, rsp);
2201 /* Add a trailing zero. This lets filter_popups
2202 * use string operations.
2206 #ifdef FEATURE_KILL_POPUPS
2207 /* Filter the popups on this read. */
2208 if (block_popups_now)
2210 filter_popups(buf, csp);
2212 #endif /* def FEATURE_KILL_POPUPS */
2214 /* Normally, this would indicate that we've read
2215 * as much as the server has sent us and we can
2216 * close the client connection. However, Microsoft
2217 * in its wisdom has released IIS/5 with a bug that
2218 * prevents it from sending the trailing \r\n in
2219 * a 302 redirect header (and possibly other headers).
2220 * To work around this if we've haven't parsed
2221 * a full header we'll append a trailing \r\n
2222 * and see if this now generates a valid one.
2224 * This hack shouldn't have any impacts. If we've
2225 * already transmitted the header or if this is a
2226 * SSL connection, then we won't bother with this
2227 * hack. So we only work on partially received
2228 * headers. If we append a \r\n and this still
2229 * doesn't generate a valid header, then we won't
2230 * transmit anything to the client.
2235 if (server_body || http->ssl)
2238 * If we have been buffering up the document,
2239 * now is the time to apply content modification
2240 * and send the result to the client.
2245 * If the content filter fails, use the original
2246 * buffer and length.
2247 * (see p != NULL ? p : csp->iob->cur below)
2249 if (NULL == (p = (*content_filter)(csp)))
2251 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2254 hdr = sed(server_patterns_light, NULL, csp);
2258 /* FIXME Should handle error properly */
2259 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2263 * Shouldn't happen because this was the second sed run
2264 * and tags are only created for the first one.
2266 assert(!crunch_response_triggered(csp));
2268 if (write_socket(csp->cfd, hdr, strlen(hdr))
2269 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
2271 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2281 break; /* "game over, man" */
2285 * This is NOT the body, so
2286 * Let's pretend the server just sent us a blank line.
2288 snprintf(buf, sizeof(buf), "\r\n");
2289 len = (int)strlen(buf);
2292 * Now, let the normal header parsing algorithm below do its
2293 * job. If it fails, we'll exit instead of continuing.
2300 * If this is an SSL connection or we're in the body
2301 * of the server document, just write it to the client,
2302 * unless we need to buffer the body for later content-filtering
2305 if (server_body || http->ssl)
2310 * If there is no memory left for buffering the content, or the buffer limit
2311 * has been reached, switch to non-filtering mode, i.e. make & write the
2312 * header, flush the iob and buf, and get out of the way.
2314 if (add_to_iob(csp, buf, len))
2319 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
2321 hdr = sed(server_patterns, add_server_headers, csp);
2325 * Memory is too tight to even generate the header.
2326 * Send our static "Out-of-memory" page.
2328 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2329 rsp = cgi_error_memory();
2330 send_crunch_response(csp, rsp);
2335 if (crunch_response_triggered(csp))
2338 * One of the tags created by a server-header
2339 * tagger triggered a crunch. We already
2340 * delivered the crunch response to the client
2341 * and are done here after cleaning up.
2347 hdrlen = strlen(hdr);
2349 if (write_socket(csp->cfd, hdr, hdrlen)
2350 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
2351 || (write_socket(csp->cfd, buf, (size_t)len)))
2353 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
2359 byte_count += hdrlen + (size_t)flushed + (size_t)len;
2361 content_filter = NULL;
2368 if (write_socket(csp->cfd, buf, (size_t)len))
2370 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2374 byte_count += (size_t)len;
2379 /* we're still looking for the end of the
2380 * server's header ... (does that make header
2381 * parsing an "out of body experience" ?
2385 * buffer up the data we just read. If that fails,
2386 * there's little we can do but send our static
2387 * out-of-memory page.
2389 if (add_to_iob(csp, buf, len))
2391 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2392 rsp = cgi_error_memory();
2393 send_crunch_response(csp, rsp);
2398 /* Convert iob into something sed() can digest */
2399 if (JB_ERR_PARSE == get_server_headers(csp))
2403 /* Well, we tried our MS IIS/5
2404 * hack and it didn't work.
2405 * The header is incomplete
2406 * and there isn't anything
2407 * we can do about it.
2413 /* Since we have to wait for
2414 * more from the server before
2415 * we can parse the headers
2416 * we just continue here.
2422 /* Did we actually get anything? */
2423 if (NULL == csp->headers->first)
2425 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
2426 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2427 strcpy(buf, NO_SERVER_DATA_RESPONSE);
2428 write_socket(csp->cfd, buf, strlen(buf));
2429 free_http_request(http);
2433 /* we have now received the entire header.
2434 * filter it and send the result to the client
2437 hdr = sed(server_patterns, add_server_headers, csp);
2440 /* FIXME Should handle error properly */
2441 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2444 if (crunch_response_triggered(csp))
2447 * One of the tags created by a server-header
2448 * tagger triggered a crunch. We already
2449 * delivered the crunch response to the client
2450 * and are done here after cleaning up.
2455 #ifdef FEATURE_KILL_POPUPS
2456 /* Start blocking popups if appropriate. */
2458 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
2459 !http->ssl && /* We talk plaintext */
2460 block_popups) /* Policy allows */
2462 block_popups_now = 1;
2464 * Filter the part of the body that came in the same read
2465 * as the last headers:
2467 filter_popups(csp->iob->cur, csp);
2470 #endif /* def FEATURE_KILL_POPUPS */
2472 /* Buffer and pcrs filter this if appropriate. */
2474 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
2475 !http->ssl && /* We talk plaintext */
2476 pcrs_filter) /* Policy allows */
2478 content_filter = pcrs_filter_response;
2481 /* Buffer and gif_deanimate this if appropriate. */
2483 if ((csp->content_type & CT_GIF) && /* It's an image/gif MIME-Type */
2484 !http->ssl && /* We talk plaintext */
2485 gif_deanimate) /* Policy allows */
2487 content_filter = gif_deanimate_response;
2490 /* Buffer and jpg_inspect this if appropriate. */
2492 if ((csp->content_type & CT_JPEG) && /* It's an image/jpeg MIME-Type */
2493 !http->ssl && /* We talk plaintext */
2494 jpeg_inspect) /* Policy allows */
2496 content_filter = jpeg_inspect_response;
2500 * Only write if we're not buffering for content modification
2502 if (!content_filter)
2504 /* write the server's (modified) header to
2505 * the client (along with anything else that
2506 * may be in the buffer)
2509 if (write_socket(csp->cfd, hdr, strlen(hdr))
2510 || ((len = flush_socket(csp->cfd, csp)) < 0))
2512 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
2514 /* the write failed, so don't bother
2515 * mentioning it to the client...
2516 * it probably can't hear us anyway.
2522 byte_count += (size_t)len;
2525 /* we're finished with the server's header */
2530 /* If this was a MS IIS/5 hack then it means
2531 * the server has already closed the
2532 * connection. Nothing more to read. Time
2543 return; /* huh? we should never get here */
2546 if (csp->content_length == 0)
2549 * If Privoxy didn't recalculate the
2550 * Content-Lenght, byte_count is still
2553 csp->content_length = byte_count;
2556 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
2557 csp->ip_addr_str, http->ocmd, csp->content_length);
2561 /*********************************************************************
2565 * Description : This is little more than chat. We only "serve" to
2566 * to close any socket that chat may have opened.
2569 * 1 : csp = Current client state (buffers, headers, etc...)
2573 *********************************************************************/
2575 void serve(struct client_state *csp)
2576 #else /* ifndef AMIGA */
2577 static void serve(struct client_state *csp)
2578 #endif /* def AMIGA */
2581 close_socket(csp->cfd);
2583 if (csp->sfd != JB_INVALID_SOCKET)
2585 close_socket(csp->sfd);
2588 csp->flags &= ~CSP_FLAG_ACTIVE;
2594 /*********************************************************************
2596 * Function : server_thread
2598 * Description : We only exist to call `serve' in a threaded environment.
2601 * 1 : data = Current client state (buffers, headers, etc...)
2603 * Returns : Always 0.
2605 *********************************************************************/
2606 static int32 server_thread(void *data)
2608 serve((struct client_state *) data);
2615 /*********************************************************************
2619 * Description : Print usage info & exit.
2621 * Parameters : Pointer to argv[0] for identifying ourselves
2625 *********************************************************************/
2626 void usage(const char *myname)
2628 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
2630 "Usage: %s [--help] [--version] [configfile]\n"
2632 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
2634 "Aborting.\n", myname);
2641 /*********************************************************************
2643 * Function : initialize_mutexes
2645 * Description : Prepares mutexes if mutex support is available.
2649 * Returns : Void, exits in case of errors.
2651 *********************************************************************/
2652 void initialize_mutexes()
2656 #ifdef FEATURE_PTHREAD
2658 * Prepare global mutex semaphores
2660 err = pthread_mutex_init(&log_mutex, 0);
2662 if (!err) err = pthread_mutex_init(&log_init_mutex, 0);
2665 * XXX: The assumptions below are a bit naive
2666 * and can cause locks that aren't necessary.
2668 * For example older FreeBSD versions (< 6.x?)
2669 * have no gethostbyname_r, but gethostbyname is
2672 #ifndef HAVE_GMTIME_R
2673 if (!err) err = pthread_mutex_init(&gmtime_mutex, 0);
2674 #endif /* ndef HAVE_GMTIME_R */
2676 #ifndef HAVE_LOCALTIME_R
2677 if (!err) err = pthread_mutex_init(&localtime_mutex, 0);
2678 #endif /* ndef HAVE_GMTIME_R */
2680 #ifndef HAVE_GETHOSTBYADDR_R
2681 if (!err) err = pthread_mutex_init(&gethostbyaddr_mutex, 0);
2682 #endif /* ndef HAVE_GETHOSTBYADDR_R */
2684 #ifndef HAVE_GETHOSTBYNAME_R
2685 if (!err) err = pthread_mutex_init(&gethostbyname_mutex, 0);
2686 #endif /* ndef HAVE_GETHOSTBYNAME_R */
2689 if (!err) err = pthread_mutex_init(&rand_mutex, 0);
2690 #endif /* ndef HAVE_RANDOM */
2691 #endif /* FEATURE_PTHREAD */
2694 * TODO: mutex support for mingw32 would be swell.
2699 printf("Fatal error. Mutex initialization failed: %s.\n",
2708 /*********************************************************************
2712 * Description : Load the config file and start the listen loop.
2713 * This function is a lot more *sane* with the `load_config'
2714 * and `listen_loop' functions; although it stills does
2715 * a *little* too much for my taste.
2718 * 1 : argc = Number of parameters (including $0).
2719 * 2 : argv = Array of (char *)'s to the parameters.
2721 * Returns : 1 if : can't open config file, unrecognized directive,
2722 * stats requested in multi-thread mode, can't open the
2723 * log file, can't open the jar file, listen port is invalid,
2724 * any load fails, and can't bind port.
2726 * Else main never returns, the process must be signaled
2727 * to terminate execution. Or, on Windows, use the
2728 * "File", "Exit" menu option.
2730 *********************************************************************/
2732 int real_main(int argc, const char *argv[])
2734 int main(int argc, const char *argv[])
2738 unsigned int random_seed;
2740 struct passwd *pw = NULL;
2741 struct group *grp = NULL;
2750 #if !defined(_WIN32)
2758 * Parse the command line arguments
2760 while (++argc_pos < argc)
2763 /* Check to see if the service must be installed or uninstalled */
2764 if (strncmp(argv[argc_pos], "--install", 9) == 0)
2766 const char *pName = argv[argc_pos] + 9;
2769 exit( (install_service(pName)) ? 0 : 1 );
2771 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
2773 const char *pName = argv[argc_pos] + 11;
2776 exit((uninstall_service(pName)) ? 0 : 1);
2778 else if (strcmp(argv[argc_pos], "--service" ) == 0)
2780 bRunAsService = TRUE;
2781 w32_set_service_cwd();
2782 atexit(w32_service_exit_notify);
2785 #endif /* defined(_WIN32) */
2788 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2790 if (strcmp(argv[argc_pos], "--help") == 0)
2795 else if(strcmp(argv[argc_pos], "--version") == 0)
2797 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
2803 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
2808 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
2810 if (++argc_pos == argc) usage(argv[0]);
2811 pidfile = strdup(argv[argc_pos]);
2814 else if (strcmp(argv[argc_pos], "--user" ) == 0)
2816 if (++argc_pos == argc) usage(argv[argc_pos]);
2818 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
2821 if (NULL == (grp = getgrnam(p)))
2823 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
2827 if (NULL == (pw = getpwnam(argv[argc_pos])))
2829 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
2832 if (p != NULL) *--p = '\0';
2835 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
2840 #endif /* defined(unix) */
2841 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
2843 configfile = argv[argc_pos];
2846 } /* -END- while (more arguments) */
2849 if ( *configfile != '/' )
2851 char *abs_file, cwd[1024];
2853 /* make config-filename absolute here */
2854 if ( !(getcwd(cwd, sizeof(cwd))))
2856 perror("get working dir failed");
2860 if (!(basedir = strdup(cwd))
2861 || (!(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))))
2863 perror("malloc failed");
2866 strcpy( abs_file, basedir );
2867 strcat( abs_file, "/" );
2868 strcat( abs_file, configfile );
2869 configfile = abs_file;
2871 #endif /* defined unix */
2875 clients->next = NULL;
2879 #elif defined(_WIN32)
2883 /* Prepare mutexes if supported and necessary. */
2884 initialize_mutexes();
2886 random_seed = (unsigned int)time(NULL);
2888 srandom(random_seed);
2891 #endif /* ifdef HAVE_RANDOM */
2894 * Unix signal handling
2896 * Catch the abort, interrupt and terminate signals for a graceful exit
2897 * Catch the hangup signal so the errlog can be reopened.
2898 * Ignore the broken pipe signals (FIXME: Why?)
2900 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
2903 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
2904 const int ignored_signals[] = { SIGPIPE, 0 };
2906 for (idx = 0; catched_signals[idx] != 0; idx++)
2908 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
2909 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
2911 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
2912 #endif /* ifdef sun */
2914 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
2918 for (idx = 0; ignored_signals[idx] != 0; idx++)
2920 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
2922 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
2927 #else /* ifdef _WIN32 */
2928 # ifdef _WIN_CONSOLE
2930 * We *are* in a windows console app.
2931 * Print a verbose messages about FAQ's and such
2933 printf("%s", win32_blurb);
2934 # endif /* def _WIN_CONSOLE */
2935 #endif /* def _WIN32 */
2938 /* Initialize the CGI subsystem */
2939 cgi_init_error_messages();
2942 * If runnig on unix and without the --nodaemon
2943 * option, become a daemon. I.e. fork, detach
2944 * from tty and get process group leadership
2957 if ( pid < 0 ) /* error */
2962 else if ( pid != 0 ) /* parent */
2967 * must check for errors
2968 * child died due to missing files aso
2971 wpid = waitpid( pid, &status, WNOHANG );
2980 /* Should be more portable, but not as well tested */
2985 #else /* ndef __FreeBSD__ */
2987 #endif /* ndef __FreeBSD__ */
2988 fd = open("/dev/tty", O_RDONLY);
2991 /* no error check here */
2992 ioctl( fd, TIOCNOTTY,0 );
2996 /* FIXME: should close stderr (fd 2) here too, but the test
2998 * and load config file is done in listen_loop() and puts
2999 * some messages on stderr there.
3006 } /* -END- if (!no_daemon) */
3009 * As soon as we have written the PID file, we can switch
3010 * to the user and group ID indicated by the --user option
3016 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3018 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3024 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3026 if (chroot(pw->pw_dir) < 0)
3028 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3032 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3035 if (setuid(pw->pw_uid))
3037 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3041 char putenv_dummy[64];
3043 strcpy(putenv_dummy, "HOME=/");
3044 if (putenv(putenv_dummy) != 0)
3046 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3049 snprintf(putenv_dummy, 64, "USER=%s", pw->pw_name);
3050 if (putenv(putenv_dummy) != 0)
3052 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3058 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3061 #endif /* defined unix */
3064 /* This will be FALSE unless the command line specified --service
3068 /* Yup, so now we must attempt to establish a connection
3069 * with the service dispatcher. This will only work if this
3070 * process was launched by the service control manager to
3071 * actually run as a service. If this isn't the case, i've
3072 * known it take around 30 seconds or so for the call to return.
3075 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3076 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3078 /* Service has run, and at this point is now being stopped, so just return */
3083 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3085 /* An error occurred. Usually it's because --service was wrongly specified
3086 * and we were unable to connect to the Service Control Dispatcher because
3087 * it wasn't expecting us and is therefore not listening.
3089 * For now, just continue below to call the listen_loop function.
3092 #endif /* def _WIN32 */
3102 /*********************************************************************
3104 * Function : bind_port_helper
3106 * Description : Bind the listen port. Handles logging, and aborts
3110 * 1 : config = Privoxy configuration. Specifies port
3113 * Returns : Port that was opened.
3115 *********************************************************************/
3116 static jb_socket bind_port_helper(struct configuration_spec * config)
3121 if ( (config->haddr != NULL)
3122 && (config->haddr[0] == '1')
3123 && (config->haddr[1] == '2')
3124 && (config->haddr[2] == '7')
3125 && (config->haddr[3] == '.') )
3127 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
3130 else if (config->haddr == NULL)
3132 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3137 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3138 config->hport, config->haddr);
3141 result = bind_port(config->haddr, config->hport, &bfd);
3148 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3149 "There may be another Privoxy or some other "
3150 "proxy running on port %d",
3151 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
3152 config->hport, config->hport);
3155 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3156 "The hostname is not resolvable",
3157 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3160 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
3161 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3164 /* shouldn't get here */
3165 return JB_INVALID_SOCKET;
3168 config->need_bind = 0;
3175 /* Without this simple workaround we get this compiler warning from _beginthread
3176 * warning C4028: formal parameter 1 different from declaration
3178 void w32_service_listen_loop(void *p)
3182 #endif /* def _WIN32 */
3185 /*********************************************************************
3187 * Function : listen_loop
3189 * Description : bind the listen port and enter a "FOREVER" listening loop.
3195 *********************************************************************/
3196 static void listen_loop(void)
3198 struct client_state *csp = NULL;
3200 struct configuration_spec * config;
3202 config = load_config();
3204 bfd = bind_port_helper(config);
3206 #ifdef FEATURE_GRACEFUL_TERMINATION
3207 while (!g_terminate)
3212 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
3213 while (waitpid(-1, NULL, WNOHANG) > 0)
3215 /* zombie children */
3217 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
3220 * Free data that was used by died threads
3226 * Re-open the errlog after HUP signal
3228 if (received_hup_signal)
3230 init_error_log(Argv[0], config->logfile, config->debug);
3231 received_hup_signal = 0;
3236 #ifdef FEATURE_COOKIE_JAR
3238 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
3239 * already open. I think unload_configfile() is not being run, which should do
3240 * this work. Until that can get resolved, we'll use this workaround.
3244 if (csp->config->jar)
3246 fclose(csp->config->jar);
3247 csp->config->jar = NULL;
3249 #endif /* FEATURE_COOKIE_JAR */
3250 #endif /* __OS2__ */
3252 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
3254 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
3258 csp->flags |= CSP_FLAG_ACTIVE;
3259 csp->sfd = JB_INVALID_SOCKET;
3261 csp->config = config = load_config();
3263 if ( config->need_bind )
3266 * Since we were listening to the "old port", we will not see
3267 * a "listen" param change until the next IJB request. So, at
3268 * least 1 more request must be made for us to find the new
3269 * setting. I am simply closing the old socket and binding the
3272 * Which-ever is correct, we will serve 1 more page via the
3273 * old settings. This should probably be a "show-proxy-args"
3274 * request. This should not be a so common of an operation
3275 * that this will hurt people's feelings.
3280 bfd = bind_port_helper(config);
3283 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
3285 if (!accept_connection(csp, bfd))
3287 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
3300 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
3303 #ifdef FEATURE_TOGGLE
3304 if (global_toggle_state)
3306 csp->flags |= CSP_FLAG_TOGGLED_ON;
3308 #endif /* def FEATURE_TOGGLE */
3310 if (run_loader(csp))
3312 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
3313 /* Never get here - LOG_LEVEL_FATAL causes program exit */
3317 if (block_acl(NULL,csp))
3319 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
3320 close_socket(csp->cfd);
3324 #endif /* def FEATURE_ACL */
3326 /* add it to the list of clients */
3327 csp->next = clients->next;
3328 clients->next = csp;
3330 if (config->multi_threaded)
3334 /* this is a switch () statment in the C preprocessor - ugh */
3335 #undef SELECTED_ONE_OPTION
3337 /* Use Pthreads in preference to native code */
3338 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
3339 #define SELECTED_ONE_OPTION
3341 pthread_t the_thread;
3342 pthread_attr_t attrs;
3344 pthread_attr_init(&attrs);
3345 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
3346 errno = pthread_create(&the_thread, &attrs,
3347 (void * (*)(void *))serve, csp);
3348 child_id = errno ? -1 : 0;
3349 pthread_attr_destroy(&attrs);
3353 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
3354 #define SELECTED_ONE_OPTION
3355 child_id = _beginthread(
3356 (void (*)(void *))serve,
3361 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
3362 #define SELECTED_ONE_OPTION
3363 child_id = _beginthread(
3364 (void(* _Optlink)(void*))serve,
3370 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
3371 #define SELECTED_ONE_OPTION
3373 thread_id tid = spawn_thread
3374 (server_thread, "server", B_NORMAL_PRIORITY, csp);
3376 if ((tid >= 0) && (resume_thread(tid) == B_OK))
3378 child_id = (int) tid;
3387 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
3388 #define SELECTED_ONE_OPTION
3389 csp->cfd = ReleaseSocket(csp->cfd, -1);
3392 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3393 NP_Output, Output(),
3394 NP_CloseOutput, FALSE,
3395 NP_Name, (ULONG)"privoxy child",
3399 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3400 NP_Output, Output(),
3401 NP_CloseOutput, FALSE,
3402 NP_Name, (ULONG)"privoxy child",
3403 NP_StackSize, 200*1024,
3409 ((struct Task *)child_id)->tc_UserData = csp;
3410 Signal((struct Task *)child_id, SIGF_SINGLE);
3415 #if !defined(SELECTED_ONE_OPTION)
3418 /* This block is only needed when using fork().
3419 * When using threads, the server thread was
3420 * created and run by the call to _beginthread().
3422 if (child_id == 0) /* child */
3425 #ifdef FEATURE_TOGGLE
3426 int inherited_toggle_state = global_toggle_state;
3427 #endif /* def FEATURE_TOGGLE */
3432 * If we've been toggled or we've blocked the request, tell Mom
3435 #ifdef FEATURE_TOGGLE
3436 if (inherited_toggle_state != global_toggle_state)
3438 rc |= RC_FLAG_TOGGLED;
3440 #endif /* def FEATURE_TOGGLE */
3442 #ifdef FEATURE_STATISTICS
3443 if (csp->flags & CSP_FLAG_REJECTED)
3445 rc |= RC_FLAG_BLOCKED;
3447 #endif /* ndef FEATURE_STATISTICS */
3451 else if (child_id > 0) /* parent */
3453 /* in a fork()'d environment, the parent's
3454 * copy of the client socket and the CSP
3458 #if !defined(_WIN32) && !defined(__CYGWIN__)
3460 wait( &child_status );
3463 * Evaluate child's return code: If the child has
3464 * - been toggled, toggle ourselves
3465 * - blocked its request, bump up the stats counter
3468 #ifdef FEATURE_TOGGLE
3469 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
3471 global_toggle_state = !global_toggle_state;
3473 #endif /* def FEATURE_TOGGLE */
3475 #ifdef FEATURE_STATISTICS
3477 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
3481 #endif /* def FEATURE_STATISTICS */
3483 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
3484 close_socket(csp->cfd);
3485 csp->flags &= ~CSP_FLAG_ACTIVE;
3489 #undef SELECTED_ONE_OPTION
3490 /* end of cpp switch () */
3492 if (child_id < 0) /* failed */
3494 char buf[BUFFER_SIZE];
3496 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
3498 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
3500 write_socket(csp->cfd, buf, strlen(buf));
3501 close_socket(csp->cfd);
3502 csp->flags &= ~CSP_FLAG_ACTIVE;
3513 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
3515 /* Clean up. Aim: free all memory (no leaks) */
3516 #ifdef FEATURE_GRACEFUL_TERMINATION
3518 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
3520 unload_current_config_file();
3521 unload_current_actions_file();
3522 unload_current_re_filterfile();
3523 #ifdef FEATURE_TRUST
3524 unload_current_trust_file();
3527 if (config->multi_threaded)
3534 } while ((clients->next != NULL) && (--i > 0));
3538 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
3549 #ifdef FEATURE_COOKIE_JAR
3550 if (NULL != config->jar)
3552 fclose(config->jar);
3556 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
3557 /* Cleanup - remove taskbar icon etc. */
3562 #endif /* FEATURE_GRACEFUL_TERMINATION */