1 const char jcc_rcs[] = "$Id: jcc.c,v 1.104 2006/09/23 13:26:38 roro 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 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 1.104 2006/09/23 13:26:38 roro
37 * Replace TABs by spaces in source code.
39 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
40 * Fix +redirect{}. Didn't work with -fast-redirects.
42 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
43 * Respond with 400 and a short text message
44 * if the client tries to use Privoxy as FTP proxy.
46 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
47 * Make number of retries in case of forwarded-connect problems
48 * a config file option (forwarded-connect-retries) and use 0 as
51 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
54 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
55 * Follow the OpenBSD port's lead and protect the resolve
56 * functions on OpenBSD as well.
58 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
59 * --user fix. Only use the user as group if no group is specified.
60 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
62 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
63 * Windows service (re-)integration
67 * --install[:service_name]
68 * --uninstall[:service_name]
71 * They work as follows:
72 * --install will create a service for you and then terminate.
73 * By default the service name will be "privoxy" (without the quotes).
74 * However you can run multiple services if you wish, just by adding
75 * a colon and then a name (no spaces).
77 * --uninstall follows the exact same rules a --install.
79 * --service is used when the program is executed by the service
80 * control manager, and in normal circumstances would never be
81 * used as a command line argument.
83 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
84 * Windows service integration
86 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
87 * Incorporate Fabian Keil's patch work:
\rhttp://www.fabiankeil.de/sourcecode/privoxy/
89 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
90 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
91 * with what was really the latest development (the v_3_0_branch branch)
93 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
94 * Thanks to Jindrich Makovicka for a race condition fix for the log
95 * file. The race condition remains for non-pthread implementations.
96 * Reference patch #1175720.
98 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
99 * Add the ability to check jpeg images for invalid
100 * lengths of comment blocks. Defensive strategy
101 * against the exploit:
102 * Microsoft Security Bulletin MS04-028
103 * Buffer Overrun in JPEG Processing (GDI+) Could
104 * Allow Code Execution (833987)
105 * Enabled with +inspect-jpegs in actions files.
107 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
108 * - Fixed usage info for non-unix platforms
109 * - Fixed small cmdline parsing bug
111 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
112 * Diagnostics: Now preserve the returncode of pthread_create
113 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
115 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
116 * No longer ignore SIGCHLD. Fixes bug #769381
118 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
119 * Close jarfile on graceful exit, remove stray line
121 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
122 * Cosmetics: Killed a warning, a typo and an allocation left at exit
124 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
125 * No longer rely on non-POSIX.1 extensions of getcwd().
128 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
129 * Replaced setenv() by posix-compliant putenv()
130 * Thanks to Neil McCalden (nmcc AT users.sf.net).
132 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
133 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
135 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
136 * Clean-up and extension of improvements for forked mode:
137 * - Child's return code now consists of flags RC_FLAG_*
138 * - Reporting toggle to parent now properly #ifdef'ed
139 * - Children now report blocking to parent. This enables
140 * statistics in forked mode
142 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
143 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
144 * Children now report having been toggled through _exit(17), parents
145 * watch for that code and toggle themselves if found.
147 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
148 * Wrapping all *_r functions (the non-_r versions of them) with
149 * mutex semaphores for OSX. Hopefully this will take care of all
150 * of those pesky crash reports.
152 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
153 * Fixed two mostly harmless mem leaks
155 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
156 * Fix: Head of global clients list now initialized to NULL
158 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
159 * Added basic support for OPTIONS and TRACE HTTP methods:
160 * - New interceptor direct_response() added in chat().
161 * - sed() moved to earlier in the process, so that the
162 * Host: header is evaluated before actions and forwarding
165 * Revision 1.92 2002/05/08 16:00:46 oes
166 * Chat's buffer handling:
167 * - Fixed bug with unchecked out-of-mem conditions
168 * while reading client request & server headers
169 * - No longer predict if the buffer limit will be exceeded
170 * in the next read -- check add_to_iob's new
171 * return code. If buffer couldn't be extended
172 * (policy or out-of-mem) while
173 * - reading from client: abort
174 * - reading server headers: send error page
175 * - buffering server body for filter: flush,
176 * and if that fails: send error page
178 * Revision 1.91 2002/04/08 20:35:58 swa
181 * Revision 1.90 2002/04/02 14:57:28 oes
182 * Made sending wafers independent of FEATURE_COOKIE_JAR
184 * Revision 1.89 2002/03/31 17:18:59 jongfoster
185 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
187 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
188 * More compiler warning message maintenance
190 * Revision 1.87 2002/03/26 22:29:54 swa
191 * we have a new homepage!
193 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
194 * Workaround for closing the jarfile before load_config() comes around again
196 * Revision 1.85 2002/03/24 15:23:33 jongfoster
199 * Revision 1.84 2002/03/24 13:25:43 swa
200 * name change related issues
202 * Revision 1.83 2002/03/16 23:54:06 jongfoster
203 * Adding graceful termination feature, to help look for memory leaks.
204 * If you enable this (which, by design, has to be done by hand
205 * editing config.h) and then go to http://i.j.b/die, then the program
206 * will exit cleanly after the *next* request. It should free all the
207 * memory that was used.
209 * Revision 1.82 2002/03/13 00:27:05 jongfoster
212 * Revision 1.81 2002/03/12 01:42:50 oes
213 * Introduced modular filters
215 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
216 * OS/2 port maintenance:
217 * - Fixed EMX build - it had decayed a little
218 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
219 * substituted a memset for now.
221 * Revision 1.79 2002/03/09 20:03:52 jongfoster
222 * - Making various functions return int rather than size_t.
223 * (Undoing a recent change). Since size_t is unsigned on
224 * Windows, functions like read_socket that return -1 on
225 * error cannot return a size_t.
227 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
228 * crashes, and also frequently caused JB to jump to 100%
229 * CPU and stay there. (Because it thought it had just
230 * read ((unsigned)-1) == 4Gb of data...)
232 * - The signature of write_socket has changed, it now simply
233 * returns success=0/failure=nonzero.
235 * - Trying to get rid of a few warnings --with-debug on
236 * Windows, I've introduced a new type "jb_socket". This is
237 * used for the socket file descriptors. On Windows, this
238 * is SOCKET (a typedef for unsigned). Everywhere else, it's
239 * an int. The error value can't be -1 any more, so it's
240 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
241 * Windows it maps to the #define INVALID_SOCKET.)
243 * - The signature of bind_port has changed.
245 * Revision 1.78 2002/03/08 21:35:04 oes
246 * Added optional group supplement to --user option. Will now use default group of user if no group given
248 * Revision 1.77 2002/03/07 03:52:06 oes
249 * - Fixed compiler warnings etc
250 * - Improved handling of failed DNS lookups
252 * Revision 1.76 2002/03/06 22:54:35 jongfoster
253 * Automated function-comment nitpicking.
255 * Revision 1.75 2002/03/06 10:02:19 oes
256 * Fixed stupid bug when --user was not given
258 * Revision 1.74 2002/03/06 00:49:31 jongfoster
259 * Fixing warning on Windows
260 * Making #ifdefs that refer to the same variable consistently
261 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
263 * Revision 1.73 2002/03/05 23:57:30 hal9
264 * Stray character 's' on line 1618 was breaking build.
266 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
267 * - Re-enable OS/2 building after new parms were added
268 * - Fix false out of memory report when resolving CGI templates when no IP
269 * address is available of failed attempt (a la no such domain)
271 * Revision 1.71 2002/03/05 18:13:56 oes
272 * Added --user option
274 * Revision 1.70 2002/03/05 04:52:42 oes
275 * Deleted non-errlog debugging code
277 * Revision 1.69 2002/03/04 23:50:00 jongfoster
278 * Splitting off bind_port() call into bind_port_helper(), with
281 * Revision 1.68 2002/03/04 20:17:32 oes
284 * Revision 1.67 2002/03/04 18:18:57 oes
285 * - Removed _DEBUG mode
286 * - Cleand up cmdline parsing
287 * - Introduced --no-daemon, --pidfile options
288 * - Cleaned up signal handling:
289 * - Terminate cleanly on INT, TERM and ABRT
290 * - Schedule logfile for re-opening on HUP
291 * - Ignore CHLD and PIPE
292 * - Leave the rest with their default handlers
293 * - Uniform handler registration
294 * - Added usage() function
295 * - Played styleguide police
297 * Revision 1.66 2002/03/03 15:06:55 oes
298 * Re-enabled automatic config reloading
300 * Revision 1.65 2002/03/03 14:49:11 oes
301 * Fixed CLF logging: Now uses client's original HTTP request
303 * Revision 1.64 2002/03/03 09:18:03 joergs
304 * Made jumbjuster work on AmigaOS again.
306 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
307 * Clean up a little CRLF unpleasantness that suddenly appeared
309 * Revision 1.62 2002/02/20 23:17:23 jongfoster
310 * Detecting some out-of memory conditions and exiting with a log message.
312 * Revision 1.61 2002/01/17 21:01:52 jongfoster
313 * Moving all our URL and URL pattern parsing code to urlmatch.c.
315 * Revision 1.60 2001/12/30 14:07:32 steudten
316 * - Add signal handling (unix)
317 * - Add SIGHUP handler (unix)
318 * - Add creation of pidfile (unix)
319 * - Add action 'top' in rc file (RH)
320 * - Add entry 'SIGNALS' to manpage
321 * - Add exit message to logfile (unix)
323 * Revision 1.59 2001/12/13 14:07:18 oes
324 * Fixed Bug: 503 error page now sent OK
326 * Revision 1.58 2001/11/30 23:37:24 jongfoster
327 * Renaming the Win32 config file to config.txt - this is almost the
328 * same as the corresponding UNIX name "config"
330 * Revision 1.57 2001/11/16 00:47:43 jongfoster
331 * Changing the tty-disconnection code to use setsid().
333 * Revision 1.56 2001/11/13 20:20:54 jongfoster
334 * Tabs->spaces, fixing a bug with missing {} around an if()
336 * Revision 1.55 2001/11/13 20:14:53 jongfoster
337 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
339 * Revision 1.54 2001/11/07 00:03:14 steudten
340 * Give reliable return value if an error
341 * occurs not just 0 with new daemon mode.
343 * Revision 1.53 2001/11/05 21:41:43 steudten
344 * Add changes to be a real daemon just for unix os.
345 * (change cwd to /, detach from controlling tty, set
346 * process group and session leader to the own process.
348 * Add some fatal-error log message for failed malloc().
349 * Add '-d' if compiled with 'configure --with-debug' to
350 * enable debug output.
352 * Revision 1.52 2001/10/26 20:11:20 jongfoster
353 * Fixing type mismatch
355 * Revision 1.51 2001/10/26 17:38:28 oes
358 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
359 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
360 * threads to call select() simultaneously. So, it's time to do a real, live,
361 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
362 * (native). Both versions will work, but using __OS2__ offers multi-threading.
364 * Revision 1.49 2001/10/23 21:41:35 jongfoster
365 * Added call to initialize the (statically-allocated of course)
366 * "out of memory" CGI response.
368 * Revision 1.48 2001/10/10 19:56:46 jongfoster
369 * Moving some code that wasn't cookie-related out of an #ifdef
372 * Revision 1.47 2001/10/10 16:44:36 oes
373 * Added CONNECT destination port limitation check
375 * Revision 1.46 2001/10/08 15:17:41 oes
376 * Re-enabled SSL forwarding
378 * Revision 1.45 2001/10/07 15:42:11 oes
379 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
381 * Moved downgrading of the HTTP version from parse_http_request to
382 * chat(), since we can't decide if it is necessary before we have
383 * determined the actions for the URL. The HTTP command is now
384 * *always* re-built so the repairs need no longer be special-cased.
386 * filter_popups now gets a csp pointer so it can raise the new
387 * CSP_FLAG_MODIFIED flag.
391 * Added configurable size limit for the IOB. If the IOB grows so
392 * large that the next read would exceed the limit, the header
393 * is generated, and the header & unfiltered buffer are flushed
394 * to the client. Chat then continues in non-buffering,
395 * non-filtering body mode.
397 * Revision 1.44 2001/10/02 18:13:57 oes
400 * Revision 1.43 2001/10/02 15:32:13 oes
401 * Moved generation of hdr
403 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
404 * Cleaning up 2 compiler warnings on OS/2.
406 * Revision 1.41 2001/09/16 17:05:14 jongfoster
407 * Removing unused #include showarg.h
409 * Revision 1.40 2001/09/16 15:41:45 jongfoster
410 * Fixing signed/unsigned comparison warning.
412 * Revision 1.39 2001/09/16 13:21:27 jongfoster
413 * Changes to use new list functions.
415 * Revision 1.38 2001/09/16 13:01:46 jongfoster
416 * Removing redundant function call that zeroed zalloc()'d memory.
418 * Revision 1.37 2001/09/10 11:12:24 oes
419 * Deleted unused variable
421 * Revision 1.36 2001/09/10 10:56:15 oes
422 * Silenced compiler warnings
424 * Revision 1.35 2001/07/31 14:44:22 oes
425 * Deleted unused size parameter from filter_popups()
427 * Revision 1.34 2001/07/30 22:08:36 jongfoster
428 * Tidying up #defines:
429 * - All feature #defines are now of the form FEATURE_xxx
430 * - Permanently turned off WIN_GUI_EDIT
431 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
433 * Revision 1.33 2001/07/29 19:32:00 jongfoster
434 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
436 * Revision 1.32 2001/07/29 18:47:05 jongfoster
437 * Adding missing #include "loadcfg.h"
439 * Revision 1.31 2001/07/29 12:17:48 oes
440 * Applied pthread fix by Paul Lieverse
442 * Revision 1.30 2001/07/25 22:57:13 jongfoster
443 * __BEOS__ no longer overrides FEATURE_PTHREAD.
444 * This is because FEATURE_PTHREAD will soon be widely used, so I
445 * want to keep it simple.
447 * Revision 1.29 2001/07/24 12:47:06 oes
448 * Applied BeOS support update by Eugenia
450 * Revision 1.28 2001/07/23 13:26:12 oes
451 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
453 * Revision 1.27 2001/07/19 19:09:47 haroon
454 * - Added code to take care of the situation where while processing the first
455 * server response (which includes the server header), after finding the end
456 * of the headers we were not looking past the end of the headers for
457 * content modification. I enabled it for filter_popups.
458 * Someone else should look to see if other similar operations should be
459 * done to the discarded portion of the buffer.
461 * Note 2001/07/20: No, the other content modification mechanisms will process
462 * the whole iob later anyway. --oes
464 * Revision 1.26 2001/07/18 12:31:36 oes
467 * Revision 1.25 2001/07/15 19:43:49 jongfoster
468 * Supports POSIX threads.
469 * Also removed some unused #includes.
471 * Revision 1.24 2001/07/13 14:00:40 oes
472 * - Generic content modification scheme:
473 * Each feature has its own applicability flag that is set
474 * from csp->action->flags.
475 * Replaced the "filtering" int flag , by a function pointer
476 * "content_filter" to the function that will do the content
477 * modification. If it is != NULL, the document will be buffered
478 * and processed through *content_filter, which must set
479 * csp->content_length and return a modified copy of the body
480 * or return NULL (on failiure).
481 * - Changed csp->is_text to the more generic bitmap csp->content_type
482 * which can currently take the valued CT_TEXT or CT_GIF
484 * - Removed all #ifdef PCRS
486 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
487 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
488 * the `block_acl' call. This prevents a compilation error when the user
489 * does not wish to use the "ACL" feature.
491 * Revision 1.22 2001/06/29 21:45:41 oes
492 * Indentation, CRLF->LF, Tab-> Space
494 * Revision 1.21 2001/06/29 13:29:36 oes
495 * - Cleaned up, improved comments
496 * - Unified all possible interceptors (CGI,
497 * block, trust, fast_redirect) in one
498 * place, with one (CGI) answer generation
499 * mechansim. Much clearer now.
500 * - Removed the GIF image generation, which
501 * is now done in filters.c:block_url()
502 * - Made error conditions like domain lookup
503 * failiure or (various) problems while talking
504 * to the server use cgi.c:error_response()
505 * instead of generating HTML/HTTP in chat() (yuck!)
506 * - Removed logentry from cancelled commit
508 * Revision 1.20 2001/06/09 10:55:28 jongfoster
509 * Changing BUFSIZ ==> BUFFER_SIZE
511 * Revision 1.19 2001/06/07 23:12:52 jongfoster
512 * Replacing function pointer in struct gateway with a directly
513 * called function forwarded_connect().
514 * Replacing struct gateway with struct forward_spec
516 * Revision 1.18 2001/06/03 19:12:16 oes
517 * introduced new cgi handling
519 * Revision 1.17 2001/06/01 20:07:23 jongfoster
520 * Now uses action +image-blocker{} rather than config->tinygif
522 * Revision 1.16 2001/06/01 18:49:17 jongfoster
523 * Replaced "list_share" with "list" - the tiny memory gain was not
524 * worth the extra complexity.
526 * Revision 1.15 2001/05/31 21:24:47 jongfoster
527 * Changed "permission" to "action" throughout.
528 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
529 * Moved vanilla wafer check into chat(), since we must now
530 * decide whether or not to add it based on the URL.
532 * Revision 1.14 2001/05/29 20:14:01 joergs
533 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
536 * Revision 1.13 2001/05/29 09:50:24 jongfoster
537 * Unified blocklist/imagelist/permissionslist.
538 * File format is still under discussion, but the internal changes
541 * Also modified interceptor behaviour:
542 * - We now intercept all URLs beginning with one of the following
543 * prefixes (and *only* these prefixes):
545 * * http://ijbswa.sf.net/config/
546 * * http://ijbswa.sourceforge.net/config/
547 * - New interceptors "home page" - go to http://i.j.b/ to see it.
548 * - Internal changes so that intercepted and fast redirect pages
549 * are not replaced with an image.
550 * - Interceptors now have the option to send a binary page direct
551 * to the client. (i.e. ijb-send-banner uses this)
552 * - Implemented show-url-info interceptor. (Which is why I needed
553 * the above interceptors changes - a typical URL is
554 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
555 * The previous mechanism would not have intercepted that, and
556 * if it had been intercepted then it then it would have replaced
559 * Revision 1.12 2001/05/27 22:17:04 oes
561 * - re_process_buffer no longer writes the modified buffer
562 * to the client, which was very ugly. It now returns the
563 * buffer, which it is then written by chat.
565 * - content_length now adjusts the Content-Length: header
566 * for modified documents rather than crunch()ing it.
567 * (Length info in csp->content_length, which is 0 for
568 * unmodified documents)
570 * - For this to work, sed() is called twice when filtering.
572 * Revision 1.11 2001/05/26 17:27:53 jongfoster
573 * Added support for CLF and fixed LOG_LEVEL_LOG.
574 * Also did CRLF->LF fix of my previous patch.
576 * Revision 1.10 2001/05/26 15:26:15 jongfoster
577 * ACL feature now provides more security by immediately dropping
578 * connections from untrusted hosts.
580 * Revision 1.9 2001/05/26 00:28:36 jongfoster
581 * Automatic reloading of config file.
582 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
583 * Most of the global variables have been moved to a new
584 * struct configuration_spec, accessed through csp->config->globalname
585 * Most of the globals remaining are used by the Win32 GUI.
587 * Revision 1.8 2001/05/25 22:43:18 jongfoster
588 * Fixing minor memory leak and buffer overflow.
590 * Revision 1.7 2001/05/25 22:34:30 jongfoster
593 * Revision 1.6 2001/05/23 00:13:58 joergs
594 * AmigaOS support fixed.
596 * Revision 1.5 2001/05/22 18:46:04 oes
598 * - Enabled filtering banners by size rather than URL
599 * by adding patterns that replace all standard banner
600 * sizes with the "Junkbuster" gif to the re_filterfile
602 * - Enabled filtering WebBugs by providing a pattern
603 * which kills all 1x1 images
605 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
606 * which is selected by the (nonstandard and therefore
607 * capital) letter 'U' in the option string.
608 * It causes the quantifiers to be ungreedy by default.
609 * Appending a ? turns back to greedy (!).
611 * - Added a new interceptor ijb-send-banner, which
612 * sends back the "Junkbuster" gif. Without imagelist or
613 * MSIE detection support, or if tinygif = 1, or the
614 * URL isn't recognized as an imageurl, a lame HTML
615 * explanation is sent instead.
617 * - Added new feature, which permits blocking remote
618 * script redirects and firing back a local redirect
620 * The feature is conditionally compiled, i.e. it
621 * can be disabled with --disable-fast-redirects,
622 * plus it must be activated by a "fast-redirects"
623 * line in the config file, has its own log level
624 * and of course wants to be displayed by show-proxy-args
625 * Note: Boy, all the #ifdefs in 1001 locations and
626 * all the fumbling with configure.in and acconfig.h
627 * were *way* more work than the feature itself :-(
629 * - Because a generic redirect template was needed for
630 * this, tinygif = 3 now uses the same.
632 * - Moved GIFs, and other static HTTP response templates
637 * - Removed some >400 CRs again (Jon, you really worked
640 * Revision 1.4 2001/05/21 19:34:01 jongfoster
641 * Made failure to bind() a fatal error.
643 * Revision 1.3 2001/05/20 01:21:20 jongfoster
644 * Version 2.9.4 checkin.
645 * - Merged popupfile and cookiefile, and added control over PCRS
646 * filtering, in new "permissionsfile".
647 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
648 * file error you now get a message box (in the Win32 GUI) rather
649 * than the program exiting with no explanation.
650 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
652 * - Removed tabs from "config"
653 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
654 * - Bumped up version number.
656 * Revision 1.2 2001/05/17 22:34:44 oes
657 * - Added hint on GIF char array generation to jcc.c
658 * - Cleaned CRLF's from the sources and related files
659 * - Repaired logging for REF and FRC
661 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
662 * Initial import of version 2.9.3 source tree
665 *********************************************************************/
671 #include <sys/types.h>
678 #ifdef FEATURE_PTHREAD
680 #endif /* def FEATURE_PTHREAD */
683 # ifndef FEATURE_PTHREAD
687 # include <windows.h>
688 # include <process.h>
689 # endif /* ndef FEATURE_PTHREAD */
692 # ifndef _WIN_CONSOLE
694 # endif /* ndef _WIN_CONSOLE */
695 # include "w32svrapi.h"
697 #else /* ifndef _WIN32 */
699 # if !defined (__OS2__)
701 # include <sys/wait.h>
702 # endif /* ndef __OS2__ */
703 # include <sys/time.h>
704 # include <sys/stat.h>
705 # include <sys/ioctl.h>
708 #include <sys/termios.h>
719 # include <socket.h> /* BeOS has select() for sockets only. */
720 # include <OS.h> /* declarations for threads and stuff. */
723 # if defined(__EMX__) || defined(__OS2__)
724 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
729 #define bzero(B,N) memset(B,0x00,n)
744 #include "killpopup.h"
745 #include "miscutil.h"
747 #include "jbsockets.h"
752 #include "urlmatch.h"
754 const char jcc_h_rcs[] = JCC_H_VERSION;
755 const char project_h_rcs[] = PROJECT_H_VERSION;
758 struct client_state clients[1];
759 struct file_list files[1];
761 #ifdef FEATURE_STATISTICS
762 int urls_read = 0; /* total nr of urls read inc rejected */
763 int urls_rejected = 0; /* total nr of urls rejected */
764 #endif /* def FEATURE_STATISTICS */
766 #ifdef FEATURE_GRACEFUL_TERMINATION
770 static void listen_loop(void);
771 static void chat(struct client_state *csp);
773 void serve(struct client_state *csp);
774 #else /* ifndef AMIGA */
775 static void serve(struct client_state *csp);
776 #endif /* def AMIGA */
779 static int32 server_thread(void *data);
780 #endif /* def __BEOS__ */
783 #define sleep(N) Sleep(((N) * 1000))
787 #define sleep(N) DosSleep(((N) * 100))
790 #if defined(OSX_DARWIN) || defined(__OpenBSD__)
793 * Hit OSX over the head with a hammer. Protect all *_r functions.
795 pthread_mutex_t gmtime_mutex;
796 pthread_mutex_t localtime_mutex;
797 #endif /* def OSX_DARWIN */
799 * Protect only the resolve functions for OpenBSD.
801 pthread_mutex_t gethostbyaddr_mutex;
802 pthread_mutex_t gethostbyname_mutex;
803 #endif /* defined(OSX_DARWIN) || defined(__OpenBSD__) */
805 #ifdef FEATURE_PTHREAD
806 pthread_mutex_t log_mutex;
807 pthread_mutex_t log_init_mutex;
808 #endif /* FEATURE_PTHREAD */
810 #if defined(unix) || defined(__EMX__)
811 const char *basedir = NULL;
812 const char *pidfile = NULL;
813 int received_hup_signal = 0;
814 #endif /* defined unix */
816 /* The vanilla wafer. */
817 static const char VANILLA_WAFER[] =
818 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
819 "Do_not_send_me_any_copyrighted_information_other_than_the_"
820 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
821 "In_particular_do_not_send_me_any_cookies_that_"
822 "are_subject_to_a_claim_of_copyright_by_anybody._"
823 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
824 "(copyright_or_otherwise)_applying_to_any_cookie._";
827 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
828 /*********************************************************************
830 * Function : sig_handler
832 * Description : Signal handler for different signals.
833 * Exit gracefully on ABRT, TERM and INT
834 * or set a flag that will cause the errlog
835 * to be reopened by the main thread on HUP.
838 * 1 : the_signal = the signal cause this function to call
842 *********************************************************************/
843 static void sig_handler(int the_signal)
850 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
858 received_hup_signal = 1;
863 * We shouldn't be here, unless we catch signals
864 * in main() that we can't handle here!
866 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
874 /*********************************************************************
878 * Description : Once a connection to the client has been accepted,
879 * this function is called (via serve()) to handle the
880 * main business of the communication. When this
881 * function returns, the caller must close the client
885 * 1 : csp = Current client state (buffers, headers, etc...)
887 * Returns : On success, the number of bytes written are returned (zero
888 * indicates nothing was written). On error, -1 is returned,
889 * and errno is set appropriately. If count is zero and the
890 * file descriptor refers to a regular file, 0 will be
891 * returned without causing any other effect. For a special
892 * file, the results are not portable.
894 *********************************************************************/
895 static void chat(struct client_state *csp)
898 * This next lines are a little ugly, but they simplifies the if statements
899 * below. Basically if TOGGLE, then we want the if to test if the
900 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
901 * then we want the if to test for CSP_FLAG_FORCED , else we don't
903 #ifdef FEATURE_TOGGLE
904 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
905 #else /* ifndef FEATURE_TOGGLE */
906 # define IS_TOGGLED_ON_AND
907 #endif /* ndef FEATURE_TOGGLE */
908 #ifdef FEATURE_FORCE_LOAD
909 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
910 #else /* ifndef FEATURE_FORCE_LOAD */
911 # define IS_NOT_FORCED_AND
912 #endif /* def FEATURE_FORCE_LOAD */
914 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
916 char buf[BUFFER_SIZE];
924 int ms_iis5_hack = 0;
926 unsigned int forwarded_connect_retries = 0;
927 unsigned int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
928 const struct forward_spec * fwd;
929 struct http_request *http;
930 int len; /* for buffer sizes */
931 #ifdef FEATURE_KILL_POPUPS
932 int block_popups; /* bool, 1==will block popups */
933 int block_popups_now = 0; /* bool, 1==currently blocking popups */
934 #endif /* def FEATURE_KILL_POPUPS */
936 int pcrs_filter; /* bool, 1==will filter through pcrs */
937 int gif_deanimate; /* bool, 1==will deanimate gifs */
938 int jpeg_inspect; /* bool, 1==will inspect jpegs */
940 /* Function that does the content filtering for the current request */
941 char *(*content_filter)() = NULL;
943 /* Skeleton for HTTP response, if we should intercept the request */
944 struct http_response *rsp;
949 * Read the client's request. Note that since we're not using select() we
950 * could get blocked here if a client connected, then didn't say anything!
955 len = read_socket(csp->cfd, buf, sizeof(buf));
957 if (len <= 0) break; /* error! */
960 * If there is no memory left for buffering the
961 * request, there is nothing we can do but hang up
963 if (add_to_iob(csp, buf, len))
968 req = get_header(csp);
972 break; /* no HTTP request! */
977 continue; /* more to come! */
980 #ifdef FEATURE_FORCE_LOAD
981 /* If this request contains the FORCE_PREFIX,
982 * better get rid of it now and set the force flag --oes
985 if (strstr(req, FORCE_PREFIX))
987 strclean(req, FORCE_PREFIX);
988 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
989 csp->flags |= CSP_FLAG_FORCED;
992 #endif /* def FEATURE_FORCE_LOAD */
994 parse_http_request(req, http, csp);
999 if (http->cmd == NULL)
1001 strcpy(buf, CHEADER);
1002 write_socket(csp->cfd, buf, strlen(buf));
1004 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
1006 free_http_request(http);
1010 if (!strncmpic(http->cmd, "GET ftp://", 10))
1012 strcpy(buf, FTP_RESPONSE);
1013 write_socket(csp->cfd, buf, strlen(buf));
1015 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as FTP proxy: %s",
1016 csp->ip_addr_str, http->cmd);
1018 free_http_request(http);
1022 /* decide how to route the HTTP request */
1024 if ((fwd = forward_url(http, csp)) == NULL)
1026 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1027 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1030 /* build the http request to send to the server
1031 * we have to do one of the following:
1033 * create = use the original HTTP request to create a new
1034 * HTTP request that has either the path component
1035 * without the http://domainspec (w/path) or the
1036 * full orininal URL (w/url)
1037 * Note that the path and/or the HTTP version may
1038 * have been altered by now.
1040 * connect = Open a socket to the host:port of the server
1041 * and short-circuit server and client socket.
1043 * pass = Pass the request unchanged if forwarding a CONNECT
1044 * request to a parent proxy. Note that we'll be sending
1045 * the CFAIL message ourselves if connecting to the parent
1046 * fails, but we won't send a CSUCCEED message if it works,
1047 * since that would result in a double message (ours and the
1048 * parent's). After sending the request to the parent, we simply
1051 * here's the matrix:
1054 * +--------+--------+
1056 * 0 | create | connect|
1058 * Forwarding +--------+--------+
1060 * 1 | create | pass |
1062 * +--------+--------+
1067 * Determine the actions for this URL
1069 #ifdef FEATURE_TOGGLE
1070 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1072 /* Most compatible set of actions (i.e. none) */
1073 init_current_action(csp->action);
1076 #endif /* ndef FEATURE_TOGGLE */
1078 url_actions(http, csp);
1083 * Check if a CONNECT request is allowable:
1084 * In the absence of a +limit-connect action, allow only port 443.
1085 * If there is an action, allow whatever matches the specificaton.
1089 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
1090 || (csp->action->flags & ACTION_LIMIT_CONNECT
1091 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
1093 if (csp->action->flags & ACTION_TREAT_FORBIDDEN_CONNECTS_LIKE_BLOCKS)
1095 /* The response will violate the specs, but makes unblocking easier. */
1096 log_error(LOG_LEVEL_ERROR, "Marking suspicious CONNECT request from %s for blocking.",
1098 csp->action->flags |= ACTION_BLOCK;
1103 strcpy(buf, CFORBIDDEN);
1104 write_socket(csp->cfd, buf, strlen(buf));
1105 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
1106 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
1114 * Downgrade http version from 1.1 to 1.0 if +downgrade
1117 if ( (http->ssl == 0)
1118 && (!strcmpic(http->ver, "HTTP/1.1"))
1119 && (csp->action->flags & ACTION_DOWNGRADE))
1122 http->ver = strdup("HTTP/1.0");
1124 if (http->ver == NULL)
1126 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1131 * Save a copy of the original request for logging
1133 http->ocmd = strdup(http->cmd);
1135 if (http->ocmd == NULL)
1137 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
1141 * (Re)build the HTTP request for non-SSL requests.
1142 * If forwarding, use the whole URL, else, use only the path.
1148 http->cmd = strdup(http->gpc);
1149 string_append(&http->cmd, " ");
1151 if (fwd->forward_host)
1153 string_append(&http->cmd, http->url);
1157 string_append(&http->cmd, http->path);
1159 string_append(&http->cmd, " ");
1160 string_append(&http->cmd, http->ver);
1162 if (http->cmd == NULL)
1164 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1166 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", http->cmd);
1168 enlist(csp->headers, http->cmd);
1172 * If the user has not supplied any wafers, and the user has not
1173 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1175 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1176 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1178 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1182 #ifdef FEATURE_KILL_POPUPS
1183 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
1184 #endif /* def FEATURE_KILL_POPUPS */
1186 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
1187 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
1189 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
1191 jpeg_inspect = ((csp->action->flags & ACTION_JPEG_INSPECT) != 0);
1193 /* grab the rest of the client's headers */
1197 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1199 len = read_socket(csp->cfd, buf, sizeof(buf));
1202 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1207 * If there is no memory left for buffering the
1208 * request, there is nothing we can do but hang up
1210 if (add_to_iob(csp, buf, len))
1217 if (p == NULL) break;
1219 enlist(csp->headers, p);
1224 * We have a request. Now, check to see if we need to
1225 * intercept it, i.e. If ..
1229 /* We may not forward the request by rfc2616 sect 14.31 */
1230 (NULL != (rsp = direct_response(csp)))
1232 /* or a CGI call was detected and answered */
1233 || (NULL != (rsp = dispatch_cgi(csp)))
1235 /* or we are enabled and... */
1236 || (IS_ENABLED_AND (
1238 /* ..the request was blocked */
1239 ( NULL != (rsp = block_url(csp)))
1241 /* ..or untrusted */
1242 #ifdef FEATURE_TRUST
1243 || ( NULL != (rsp = trust_url(csp)))
1244 #endif /* def FEATURE_TRUST */
1246 /* ..or a fast redirect kicked in */
1247 #ifdef FEATURE_FAST_REDIRECTS
1248 || ( NULL != (rsp = redirect_url(csp)))
1249 #endif /* def FEATURE_FAST_REDIRECTS */
1253 /* Write the answer to the client */
1254 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1255 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1257 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1260 #ifdef FEATURE_STATISTICS
1261 /* Count as a rejected request */
1262 csp->flags |= CSP_FLAG_REJECTED;
1263 #endif /* def FEATURE_STATISTICS */
1265 /* Log (FIXME: All intercept reasons appear as "crunch" with Status 200) */
1266 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
1267 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
1269 /* Clean up and return */
1270 free_http_response(rsp);
1274 hdr = sed(client_patterns, add_client_headers, csp);
1277 /* FIXME Should handle error properly */
1278 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1281 list_remove_all(csp->headers);
1283 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1285 if (fwd->forward_host)
1287 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1288 fwd->forward_host, fwd->forward_port, http->hostport);
1292 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1295 /* here we connect to the server, gateway, or the forwarder */
1297 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
1298 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
1300 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
1301 forwarded_connect_retries, http->hostport);
1304 if (csp->sfd == JB_INVALID_SOCKET)
1306 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1309 if (errno == EINVAL)
1311 rsp = error_response(csp, "no-such-domain", errno);
1313 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
1314 csp->ip_addr_str, http->ocmd);
1318 rsp = error_response(csp, "connect-failed", errno);
1320 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1321 csp->ip_addr_str, http->ocmd);
1325 /* Write the answer to the client */
1328 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1329 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1331 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1335 free_http_response(rsp);
1340 log_error(LOG_LEVEL_CONNECT, "OK");
1342 if (fwd->forward_host || (http->ssl == 0))
1344 /* write the client's (modified) header to the server
1345 * (along with anything else that may be in the buffer)
1348 if (write_socket(csp->sfd, hdr, strlen(hdr))
1349 || (flush_socket(csp->sfd, csp) < 0))
1351 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1354 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1355 csp->ip_addr_str, http->ocmd);
1357 rsp = error_response(csp, "connect-failed", errno);
1361 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1362 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1364 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1368 free_http_response(rsp);
1376 * We're running an SSL tunnel and we're not forwarding,
1377 * so just send the "connect succeeded" message to the
1378 * client, flush the rest, and get out of the way.
1380 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1381 csp->ip_addr_str, http->ocmd);
1383 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
1391 /* we're finished with the client's header */
1394 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1396 /* pass data between the client and server
1397 * until one or the other shuts down the connection.
1406 * FD_ZERO here seems to point to an errant macro which crashes.
1407 * So do this by hand for now...
1409 memset(&rfds,0x00,sizeof(fd_set));
1413 FD_SET(csp->cfd, &rfds);
1414 FD_SET(csp->sfd, &rfds);
1416 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
1420 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1424 /* this is the body of the browser's request
1425 * just read it and write it.
1428 if (FD_ISSET(csp->cfd, &rfds))
1430 len = read_socket(csp->cfd, buf, sizeof(buf));
1434 break; /* "game over, man" */
1437 if (write_socket(csp->sfd, buf, (size_t)len))
1439 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1446 * The server wants to talk. It could be the header or the body.
1447 * If `hdr' is null, then it's the header otherwise it's the body.
1448 * FIXME: Does `hdr' really mean `host'? No.
1452 if (FD_ISSET(csp->sfd, &rfds))
1455 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1459 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1461 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1462 csp->ip_addr_str, http->ocmd);
1464 rsp = error_response(csp, "connect-failed", errno);
1468 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1469 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1471 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1475 free_http_response(rsp);
1479 /* Add a trailing zero. This lets filter_popups
1480 * use string operations.
1484 #ifdef FEATURE_KILL_POPUPS
1485 /* Filter the popups on this read. */
1486 if (block_popups_now)
1488 filter_popups(buf, csp);
1490 #endif /* def FEATURE_KILL_POPUPS */
1492 /* Normally, this would indicate that we've read
1493 * as much as the server has sent us and we can
1494 * close the client connection. However, Microsoft
1495 * in its wisdom has released IIS/5 with a bug that
1496 * prevents it from sending the trailing \r\n in
1497 * a 302 redirect header (and possibly other headers).
1498 * To work around this if we've haven't parsed
1499 * a full header we'll append a trailing \r\n
1500 * and see if this now generates a valid one.
1502 * This hack shouldn't have any impacts. If we've
1503 * already transmitted the header or if this is a
1504 * SSL connection, then we won't bother with this
1505 * hack. So we only work on partially received
1506 * headers. If we append a \r\n and this still
1507 * doesn't generate a valid header, then we won't
1508 * transmit anything to the client.
1513 if (server_body || http->ssl)
1516 * If we have been buffering up the document,
1517 * now is the time to apply content modification
1518 * and send the result to the client.
1523 * If the content filter fails, use the original
1524 * buffer and length.
1525 * (see p != NULL ? p : csp->iob->cur below)
1527 if (NULL == (p = (*content_filter)(csp)))
1529 csp->content_length = csp->iob->eod - csp->iob->cur;
1532 hdr = sed(server_patterns_light, NULL, csp);
1536 /* FIXME Should handle error properly */
1537 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1540 if (write_socket(csp->cfd, hdr, strlen(hdr))
1541 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
1543 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1553 break; /* "game over, man" */
1557 * This is NOT the body, so
1558 * Let's pretend the server just sent us a blank line.
1560 len = sprintf(buf, "\r\n");
1563 * Now, let the normal header parsing algorithm below do its
1564 * job. If it fails, we'll exit instead of continuing.
1571 * If this is an SSL connection or we're in the body
1572 * of the server document, just write it to the client,
1573 * unless we need to buffer the body for later content-filtering
1576 if (server_body || http->ssl)
1581 * If there is no memory left for buffering the content, or the buffer limit
1582 * has been reached, switch to non-filtering mode, i.e. make & write the
1583 * header, flush the iob and buf, and get out of the way.
1585 if (add_to_iob(csp, buf, len))
1590 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
1592 hdr = sed(server_patterns, add_server_headers, csp);
1596 * Memory is too tight to even generate the header.
1597 * Send our static "Out-of-memory" page.
1599 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
1600 rsp = cgi_error_memory();
1602 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1603 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1605 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1610 hdrlen = strlen(hdr);
1612 if (write_socket(csp->cfd, hdr, hdrlen)
1613 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
1614 || (write_socket(csp->cfd, buf, (size_t) len)))
1616 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
1622 byte_count += hdrlen + flushed + len;
1624 content_filter = NULL;
1631 if (write_socket(csp->cfd, buf, (size_t)len))
1633 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
1642 /* we're still looking for the end of the
1643 * server's header ... (does that make header
1644 * parsing an "out of body experience" ?
1648 * buffer up the data we just read. If that fails,
1649 * there's little we can do but send our static
1650 * out-of-memory page.
1652 if (add_to_iob(csp, buf, len))
1654 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
1655 rsp = cgi_error_memory();
1657 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1658 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1660 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1665 /* get header lines from the iob */
1667 while ((p = get_header(csp)) != NULL)
1671 /* see following note */
1674 enlist(csp->headers, p);
1678 /* NOTE: there are no "empty" headers so
1679 * if the pointer `p' is not NULL we must
1680 * assume that we reached the end of the
1681 * buffer before we hit the end of the header.
1688 /* Well, we tried our MS IIS/5
1689 * hack and it didn't work.
1690 * The header is incomplete
1691 * and there isn't anything
1692 * we can do about it.
1698 /* Since we have to wait for
1699 * more from the server before
1700 * we can parse the headers
1701 * we just continue here.
1707 /* we have now received the entire header.
1708 * filter it and send the result to the client
1711 hdr = sed(server_patterns, add_server_headers, csp);
1714 /* FIXME Should handle error properly */
1715 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1718 #ifdef FEATURE_KILL_POPUPS
1719 /* Start blocking popups if appropriate. */
1721 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1722 !http->ssl && /* We talk plaintext */
1723 block_popups) /* Policy allows */
1725 block_popups_now = 1;
1727 * Filter the part of the body that came in the same read
1728 * as the last headers:
1730 filter_popups(csp->iob->cur, csp);
1733 #endif /* def FEATURE_KILL_POPUPS */
1735 /* Buffer and pcrs filter this if appropriate. */
1737 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1738 !http->ssl && /* We talk plaintext */
1739 pcrs_filter) /* Policy allows */
1741 content_filter = pcrs_filter_response;
1744 /* Buffer and gif_deanimate this if appropriate. */
1746 if ((csp->content_type & CT_GIF) && /* It's an image/gif MIME-Type */
1747 !http->ssl && /* We talk plaintext */
1748 gif_deanimate) /* Policy allows */
1750 content_filter = gif_deanimate_response;
1753 /* Buffer and jpg_inspect this if appropriate. */
1755 if ((csp->content_type & CT_JPEG) && /* It's an image/jpeg MIME-Type */
1756 !http->ssl && /* We talk plaintext */
1757 jpeg_inspect) /* Policy allows */
1759 content_filter = jpeg_inspect_response;
1763 * Only write if we're not buffering for content modification
1765 if (!content_filter)
1767 /* write the server's (modified) header to
1768 * the client (along with anything else that
1769 * may be in the buffer)
1772 if (write_socket(csp->cfd, hdr, strlen(hdr))
1773 || ((len = flush_socket(csp->cfd, csp)) < 0))
1775 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1777 /* the write failed, so don't bother
1778 * mentioning it to the client...
1779 * it probably can't hear us anyway.
1788 /* we're finished with the server's header */
1793 /* If this was a MS IIS/5 hack then it means
1794 * the server has already closed the
1795 * connection. Nothing more to read. Time
1806 return; /* huh? we should never get here */
1809 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
1810 csp->ip_addr_str, http->ocmd, byte_count);
1814 /*********************************************************************
1818 * Description : This is little more than chat. We only "serve" to
1819 * to close any socket that chat may have opened.
1822 * 1 : csp = Current client state (buffers, headers, etc...)
1826 *********************************************************************/
1828 void serve(struct client_state *csp)
1829 #else /* ifndef AMIGA */
1830 static void serve(struct client_state *csp)
1831 #endif /* def AMIGA */
1834 close_socket(csp->cfd);
1836 if (csp->sfd != JB_INVALID_SOCKET)
1838 close_socket(csp->sfd);
1841 csp->flags &= ~CSP_FLAG_ACTIVE;
1847 /*********************************************************************
1849 * Function : server_thread
1851 * Description : We only exist to call `serve' in a threaded environment.
1854 * 1 : data = Current client state (buffers, headers, etc...)
1856 * Returns : Always 0.
1858 *********************************************************************/
1859 static int32 server_thread(void *data)
1861 serve((struct client_state *) data);
1868 /*********************************************************************
1872 * Description : Print usage info & exit.
1874 * Parameters : Pointer to argv[0] for identifying ourselves
1878 *********************************************************************/
1879 void usage(const char *myname)
1881 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
1883 "Usage: %s [--help] [--version] [configfile]\n"
1885 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
1887 "Aborting.\n", myname);
1894 /*********************************************************************
1898 * Description : Load the config file and start the listen loop.
1899 * This function is a lot more *sane* with the `load_config'
1900 * and `listen_loop' functions; although it stills does
1901 * a *little* too much for my taste.
1904 * 1 : argc = Number of parameters (including $0).
1905 * 2 : argv = Array of (char *)'s to the parameters.
1907 * Returns : 1 if : can't open config file, unrecognized directive,
1908 * stats requested in multi-thread mode, can't open the
1909 * log file, can't open the jar file, listen port is invalid,
1910 * any load fails, and can't bind port.
1912 * Else main never returns, the process must be signaled
1913 * to terminate execution. Or, on Windows, use the
1914 * "File", "Exit" menu option.
1916 *********************************************************************/
1918 int real_main(int argc, const char *argv[])
1920 int main(int argc, const char *argv[])
1925 unsigned int random_seed;
1926 #endif /* ifdef HAVE_RANDOM */
1928 struct passwd *pw = NULL;
1929 struct group *grp = NULL;
1938 #if !defined(_WIN32)
1946 * Parse the command line arguments
1948 while (++argc_pos < argc)
1951 /* Check to see if the service must be installed or uninstalled */
1952 if (strncmp(argv[argc_pos], "--install", 9) == 0)
1954 const char *pName = argv[argc_pos] + 9;
1957 exit( (install_service(pName)) ? 0 : 1 );
1959 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
1961 const char *pName = argv[argc_pos] + 11;
1964 exit((uninstall_service(pName)) ? 0 : 1);
1966 else if (strcmp(argv[argc_pos], "--service" ) == 0)
1968 bRunAsService = TRUE;
1969 w32_set_service_cwd();
1970 atexit(w32_service_exit_notify);
1973 #endif /* defined(_WIN32) */
1976 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1978 if (strcmp(argv[argc_pos], "--help") == 0)
1983 else if(strcmp(argv[argc_pos], "--version") == 0)
1985 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
1991 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
1996 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
1998 if (++argc_pos == argc) usage(argv[0]);
1999 pidfile = strdup(argv[argc_pos]);
2002 else if (strcmp(argv[argc_pos], "--user" ) == 0)
2004 if (++argc_pos == argc) usage(argv[argc_pos]);
2006 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
2009 if (NULL == (grp = getgrnam(p)))
2011 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
2015 if (NULL == (pw = getpwnam(argv[argc_pos])))
2017 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
2020 if (p != NULL) *--p = '\0';
2023 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
2028 #endif /* defined(unix) */
2029 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
2031 configfile = argv[argc_pos];
2034 } /* -END- while (more arguments) */
2037 if ( *configfile != '/' )
2039 char *abs_file, cwd[1024];
2041 /* make config-filename absolute here */
2042 if ( !(getcwd(cwd, sizeof(cwd))))
2044 perror("get working dir failed");
2048 if (!(basedir = strdup(cwd))
2049 || (!(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))))
2051 perror("malloc failed");
2054 strcpy( abs_file, basedir );
2055 strcat( abs_file, "/" );
2056 strcat( abs_file, configfile );
2057 configfile = abs_file;
2059 #endif /* defined unix */
2063 clients->next = NULL;
2067 #elif defined(_WIN32)
2071 #if defined(OSX_DARWIN) || defined(__OpenBSD__)
2073 * Prepare global mutex semaphores
2076 pthread_mutex_init(&gmtime_mutex,0);
2077 pthread_mutex_init(&localtime_mutex,0);
2078 #endif /* def OSX_DARWIN */
2079 pthread_mutex_init(&gethostbyaddr_mutex,0);
2080 pthread_mutex_init(&gethostbyname_mutex,0);
2081 #endif /* defined(OSX_DARWIN) || defined(__OpenBSD__) */
2083 #ifdef FEATURE_PTHREAD
2084 pthread_mutex_init(&log_mutex,0);
2085 pthread_mutex_init(&log_init_mutex,0);
2086 #endif /* FEATURE_PTHREAD */
2089 random_seed = (unsigned int)time(NULL);
2090 srandom(random_seed);
2091 #endif /* ifdef HAVE_RANDOM */
2094 * Unix signal handling
2096 * Catch the abort, interrupt and terminate signals for a graceful exit
2097 * Catch the hangup signal so the errlog can be reopened.
2098 * Ignore the broken pipe signals (FIXME: Why?)
2100 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
2103 const int catched_signals[] = { SIGABRT, SIGTERM, SIGINT, SIGHUP, 0 };
2104 const int ignored_signals[] = { SIGPIPE, 0 };
2106 for (idx = 0; catched_signals[idx] != 0; idx++)
2108 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
2109 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
2111 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
2112 #endif /* ifdef sun */
2114 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
2118 for (idx = 0; ignored_signals[idx] != 0; idx++)
2120 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
2122 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
2127 #else /* ifdef _WIN32 */
2128 # ifdef _WIN_CONSOLE
2130 * We *are* in a windows console app.
2131 * Print a verbose messages about FAQ's and such
2133 printf(win32_blurb);
2134 # endif /* def _WIN_CONSOLE */
2135 #endif /* def _WIN32 */
2138 /* Initialize the CGI subsystem */
2139 cgi_init_error_messages();
2142 * If runnig on unix and without the --nodaemon
2143 * option, become a daemon. I.e. fork, detach
2144 * from tty and get process group leadership
2157 if ( pid < 0 ) /* error */
2162 else if ( pid != 0 ) /* parent */
2167 * must check for errors
2168 * child died due to missing files aso
2171 wpid = waitpid( pid, &status, WNOHANG );
2180 /* Should be more portable, but not as well tested */
2185 #else /* ndef __FreeBSD__ */
2187 #endif /* ndef __FreeBSD__ */
2188 fd = open("/dev/tty", O_RDONLY);
2191 /* no error check here */
2192 ioctl( fd, TIOCNOTTY,0 );
2196 /* FIXME: should close stderr (fd 2) here too, but the test
2198 * and load config file is done in listen_loop() and puts
2199 * some messages on stderr there.
2206 } /* -END- if (!no_daemon) */
2209 * As soon as we have written the PID file, we can switch
2210 * to the user and group ID indicated by the --user option
2216 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
2218 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
2224 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
2226 if (chroot(pw->pw_dir) < 0)
2228 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
2232 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
2235 if (setuid(pw->pw_uid))
2237 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
2241 char putenv_dummy[64];
2243 strcpy(putenv_dummy, "HOME=/");
2244 if (putenv(putenv_dummy) != 0)
2246 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
2249 snprintf(putenv_dummy, 64, "USER=%s", pw->pw_name);
2250 if (putenv(putenv_dummy) != 0)
2252 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
2258 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
2261 #endif /* defined unix */
2264 /* This will be FALSE unless the command line specified --service
2268 /* Yup, so now we must attempt to establish a connection
2269 * with the service dispatcher. This will only work if this
2270 * process was launched by the service control manager to
2271 * actually run as a service. If this isn't the case, i've
2272 * known it take around 30 seconds or so for the call to return.
2275 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
2276 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
2278 /* Service has run, and at this point is now being stopped, so just return */
2283 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
2285 /* An error occurred. Usually it's because --service was wrongly specified
2286 * and we were unable to connect to the Service Control Dispatcher because
2287 * it wasn't expecting us and is therefore not listening.
2289 * For now, just continue below to call the listen_loop function.
2292 #endif /* def _WIN32 */
2302 /*********************************************************************
2304 * Function : bind_port_helper
2306 * Description : Bind the listen port. Handles logging, and aborts
2310 * 1 : config = Privoxy configuration. Specifies port
2313 * Returns : Port that was opened.
2315 *********************************************************************/
2316 static jb_socket bind_port_helper(struct configuration_spec * config)
2321 if ( (config->haddr != NULL)
2322 && (config->haddr[0] == '1')
2323 && (config->haddr[1] == '2')
2324 && (config->haddr[2] == '7')
2325 && (config->haddr[3] == '.') )
2327 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
2330 else if (config->haddr == NULL)
2332 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
2337 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
2338 config->hport, config->haddr);
2341 result = bind_port(config->haddr, config->hport, &bfd);
2348 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2349 "There may be another Privoxy or some other "
2350 "proxy running on port %d",
2351 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
2352 config->hport, config->hport);
2355 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2356 "The hostname is not resolvable",
2357 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2360 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
2361 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2364 /* shouldn't get here */
2365 return JB_INVALID_SOCKET;
2368 config->need_bind = 0;
2375 /* Without this simple workaround we get this compiler warning from _beginthread
2376 * warning C4028: formal parameter 1 different from declaration
2378 void w32_service_listen_loop(void *p)
2382 #endif /* def _WIN32 */
2385 /*********************************************************************
2387 * Function : listen_loop
2389 * Description : bind the listen port and enter a "FOREVER" listening loop.
2395 *********************************************************************/
2396 static void listen_loop(void)
2398 struct client_state *csp = NULL;
2400 struct configuration_spec * config;
2402 config = load_config();
2404 bfd = bind_port_helper(config);
2406 #ifdef FEATURE_GRACEFUL_TERMINATION
2407 while (!g_terminate)
2412 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
2413 while (waitpid(-1, NULL, WNOHANG) > 0)
2415 /* zombie children */
2417 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
2420 * Free data that was used by died threads
2426 * Re-open the errlog after HUP signal
2428 if (received_hup_signal)
2430 init_error_log(Argv[0], config->logfile, config->debug);
2431 received_hup_signal = 0;
2436 #ifdef FEATURE_COOKIE_JAR
2438 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
2439 * already open. I think unload_configfile() is not being run, which should do
2440 * this work. Until that can get resolved, we'll use this workaround.
2444 if (csp->config->jar)
2446 fclose(csp->config->jar);
2447 csp->config->jar = NULL;
2449 #endif /* FEATURE_COOKIE_JAR */
2450 #endif /* __OS2__ */
2452 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
2454 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
2458 csp->flags |= CSP_FLAG_ACTIVE;
2459 csp->sfd = JB_INVALID_SOCKET;
2461 csp->config = config = load_config();
2463 if ( config->need_bind )
2466 * Since we were listening to the "old port", we will not see
2467 * a "listen" param change until the next IJB request. So, at
2468 * least 1 more request must be made for us to find the new
2469 * setting. I am simply closing the old socket and binding the
2472 * Which-ever is correct, we will serve 1 more page via the
2473 * old settings. This should probably be a "show-proxy-args"
2474 * request. This should not be a so common of an operation
2475 * that this will hurt people's feelings.
2480 bfd = bind_port_helper(config);
2483 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
2485 if (!accept_connection(csp, bfd))
2487 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
2500 log_error(LOG_LEVEL_CONNECT, "OK");
2503 #ifdef FEATURE_TOGGLE
2504 if (global_toggle_state)
2506 csp->flags |= CSP_FLAG_TOGGLED_ON;
2508 #endif /* def FEATURE_TOGGLE */
2510 if (run_loader(csp))
2512 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
2513 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2517 if (block_acl(NULL,csp))
2519 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
2520 close_socket(csp->cfd);
2524 #endif /* def FEATURE_ACL */
2526 /* add it to the list of clients */
2527 csp->next = clients->next;
2528 clients->next = csp;
2530 if (config->multi_threaded)
2534 /* this is a switch () statment in the C preprocessor - ugh */
2535 #undef SELECTED_ONE_OPTION
2537 /* Use Pthreads in preference to native code */
2538 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
2539 #define SELECTED_ONE_OPTION
2541 pthread_t the_thread;
2542 pthread_attr_t attrs;
2544 pthread_attr_init(&attrs);
2545 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
2546 errno = pthread_create(&the_thread, &attrs,
2548 child_id = errno ? -1 : 0;
2549 pthread_attr_destroy(&attrs);
2553 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
2554 #define SELECTED_ONE_OPTION
2555 child_id = _beginthread(
2556 (void (*)(void *))serve,
2561 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
2562 #define SELECTED_ONE_OPTION
2563 child_id = _beginthread(
2564 (void(* _Optlink)(void*))serve,
2570 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
2571 #define SELECTED_ONE_OPTION
2573 thread_id tid = spawn_thread
2574 (server_thread, "server", B_NORMAL_PRIORITY, csp);
2576 if ((tid >= 0) && (resume_thread(tid) == B_OK))
2578 child_id = (int) tid;
2587 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2588 #define SELECTED_ONE_OPTION
2589 csp->cfd = ReleaseSocket(csp->cfd, -1);
2591 if((child_id = (int)CreateNewProcTags(
2592 NP_Entry, (ULONG)server_thread,
2593 NP_Output, Output(),
2594 NP_CloseOutput, FALSE,
2595 NP_Name, (ULONG)"privoxy child",
2596 NP_StackSize, 200*1024,
2600 ((struct Task *)child_id)->tc_UserData = csp;
2601 Signal((struct Task *)child_id, SIGF_SINGLE);
2606 #if !defined(SELECTED_ONE_OPTION)
2609 /* This block is only needed when using fork().
2610 * When using threads, the server thread was
2611 * created and run by the call to _beginthread().
2613 if (child_id == 0) /* child */
2616 #ifdef FEATURE_TOGGLE
2617 int inherited_toggle_state = global_toggle_state;
2618 #endif /* def FEATURE_TOGGLE */
2623 * If we've been toggled or we've blocked the request, tell Mom
2626 #ifdef FEATURE_TOGGLE
2627 if (inherited_toggle_state != global_toggle_state)
2629 rc |= RC_FLAG_TOGGLED;
2631 #endif /* def FEATURE_TOGGLE */
2633 #ifdef FEATURE_STATISTICS
2634 if (csp->flags & CSP_FLAG_REJECTED)
2636 rc |= RC_FLAG_BLOCKED;
2638 #endif /* ndef FEATURE_STATISTICS */
2642 else if (child_id > 0) /* parent */
2644 /* in a fork()'d environment, the parent's
2645 * copy of the client socket and the CSP
2649 #if !defined(_WIN32) && !defined(__CYGWIN__)
2651 wait( &child_status );
2654 * Evaluate child's return code: If the child has
2655 * - been toggled, toggle ourselves
2656 * - blocked its request, bump up the stats counter
2659 #ifdef FEATURE_TOGGLE
2660 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
2662 global_toggle_state = !global_toggle_state;
2664 #endif /* def FEATURE_TOGGLE */
2666 #ifdef FEATURE_STATISTICS
2668 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
2672 #endif /* def FEATURE_STATISTICS */
2674 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
2675 close_socket(csp->cfd);
2676 csp->flags &= ~CSP_FLAG_ACTIVE;
2680 #undef SELECTED_ONE_OPTION
2681 /* end of cpp switch () */
2683 if (child_id < 0) /* failed */
2685 char buf[BUFFER_SIZE];
2687 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
2689 sprintf(buf , "Privoxy: can't fork: errno = %d", errno);
2691 write_socket(csp->cfd, buf, strlen(buf));
2692 close_socket(csp->cfd);
2693 csp->flags &= ~CSP_FLAG_ACTIVE;
2704 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
2706 /* Clean up. Aim: free all memory (no leaks) */
2707 #ifdef FEATURE_GRACEFUL_TERMINATION
2709 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
2711 unload_current_config_file();
2712 unload_current_actions_file();
2713 unload_current_re_filterfile();
2714 #ifdef FEATURE_TRUST
2715 unload_current_trust_file();
2718 if (config->multi_threaded)
2725 } while ((clients->next != NULL) && (--i > 0));
2729 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
2740 #ifdef FEATURE_COOKIE_JAR
2741 if (NULL != config->jar)
2743 fclose(config->jar);
2747 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
2748 /* Cleanup - remove taskbar icon etc. */
2753 #endif /* FEATURE_GRACEFUL_TERMINATION */