1 const char jcc_rcs[] = "$Id: jcc.c,v 1.102 2006/09/06 13:03:04 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 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 1.102 2006/09/06 13:03:04 fabiankeil
37 * Respond with 400 and a short text message
38 * if the client tries to use Privoxy as FTP proxy.
40 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
41 * Make number of retries in case of forwarded-connect problems
42 * a config file option (forwarded-connect-retries) and use 0 as
45 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
48 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
49 * Follow the OpenBSD port's lead and protect the resolve
50 * functions on OpenBSD as well.
52 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
53 * --user fix. Only use the user as group if no group is specified.
54 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
56 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
57 * Windows service (re-)integration
61 * --install[:service_name]
62 * --uninstall[:service_name]
65 * They work as follows:
66 * --install will create a service for you and then terminate.
67 * By default the service name will be "privoxy" (without the quotes).
68 * However you can run multiple services if you wish, just by adding
69 * a colon and then a name (no spaces).
71 * --uninstall follows the exact same rules a --install.
73 * --service is used when the program is executed by the service
74 * control manager, and in normal circumstances would never be
75 * used as a command line argument.
77 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
78 * Windows service integration
80 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
81 * Incorporate Fabian Keil's patch work:
\rhttp://www.fabiankeil.de/sourcecode/privoxy/
83 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
84 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
85 * with what was really the latest development (the v_3_0_branch branch)
87 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
88 * Thanks to Jindrich Makovicka for a race condition fix for the log
89 * file. The race condition remains for non-pthread implementations.
90 * Reference patch #1175720.
92 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
93 * Add the ability to check jpeg images for invalid
94 * lengths of comment blocks. Defensive strategy
95 * against the exploit:
96 * Microsoft Security Bulletin MS04-028
97 * Buffer Overrun in JPEG Processing (GDI+) Could
98 * Allow Code Execution (833987)
99 * Enabled with +inspect-jpegs in actions files.
101 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
102 * - Fixed usage info for non-unix platforms
103 * - Fixed small cmdline parsing bug
105 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
106 * Diagnostics: Now preserve the returncode of pthread_create
107 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
109 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
110 * No longer ignore SIGCHLD. Fixes bug #769381
112 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
113 * Close jarfile on graceful exit, remove stray line
115 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
116 * Cosmetics: Killed a warning, a typo and an allocation left at exit
118 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
119 * No longer rely on non-POSIX.1 extensions of getcwd().
122 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
123 * Replaced setenv() by posix-compliant putenv()
124 * Thanks to Neil McCalden (nmcc AT users.sf.net).
126 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
127 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
129 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
130 * Clean-up and extension of improvements for forked mode:
131 * - Child's return code now consists of flags RC_FLAG_*
132 * - Reporting toggle to parent now properly #ifdef'ed
133 * - Children now report blocking to parent. This enables
134 * statistics in forked mode
136 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
137 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
138 * Children now report having been toggled through _exit(17), parents
139 * watch for that code and toggle themselves if found.
141 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
142 * Wrapping all *_r functions (the non-_r versions of them) with
143 * mutex semaphores for OSX. Hopefully this will take care of all
144 * of those pesky crash reports.
146 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
147 * Fixed two mostly harmless mem leaks
149 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
150 * Fix: Head of global clients list now initialized to NULL
152 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
153 * Added basic support for OPTIONS and TRACE HTTP methods:
154 * - New interceptor direct_response() added in chat().
155 * - sed() moved to earlier in the process, so that the
156 * Host: header is evaluated before actions and forwarding
159 * Revision 1.92 2002/05/08 16:00:46 oes
160 * Chat's buffer handling:
161 * - Fixed bug with unchecked out-of-mem conditions
162 * while reading client request & server headers
163 * - No longer predict if the buffer limit will be exceeded
164 * in the next read -- check add_to_iob's new
165 * return code. If buffer couldn't be extended
166 * (policy or out-of-mem) while
167 * - reading from client: abort
168 * - reading server headers: send error page
169 * - buffering server body for filter: flush,
170 * and if that fails: send error page
172 * Revision 1.91 2002/04/08 20:35:58 swa
175 * Revision 1.90 2002/04/02 14:57:28 oes
176 * Made sending wafers independent of FEATURE_COOKIE_JAR
178 * Revision 1.89 2002/03/31 17:18:59 jongfoster
179 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
181 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
182 * More compiler warning message maintenance
184 * Revision 1.87 2002/03/26 22:29:54 swa
185 * we have a new homepage!
187 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
188 * Workaround for closing the jarfile before load_config() comes around again
190 * Revision 1.85 2002/03/24 15:23:33 jongfoster
193 * Revision 1.84 2002/03/24 13:25:43 swa
194 * name change related issues
196 * Revision 1.83 2002/03/16 23:54:06 jongfoster
197 * Adding graceful termination feature, to help look for memory leaks.
198 * If you enable this (which, by design, has to be done by hand
199 * editing config.h) and then go to http://i.j.b/die, then the program
200 * will exit cleanly after the *next* request. It should free all the
201 * memory that was used.
203 * Revision 1.82 2002/03/13 00:27:05 jongfoster
206 * Revision 1.81 2002/03/12 01:42:50 oes
207 * Introduced modular filters
209 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
210 * OS/2 port maintenance:
211 * - Fixed EMX build - it had decayed a little
212 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
213 * substituted a memset for now.
215 * Revision 1.79 2002/03/09 20:03:52 jongfoster
216 * - Making various functions return int rather than size_t.
217 * (Undoing a recent change). Since size_t is unsigned on
218 * Windows, functions like read_socket that return -1 on
219 * error cannot return a size_t.
221 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
222 * crashes, and also frequently caused JB to jump to 100%
223 * CPU and stay there. (Because it thought it had just
224 * read ((unsigned)-1) == 4Gb of data...)
226 * - The signature of write_socket has changed, it now simply
227 * returns success=0/failure=nonzero.
229 * - Trying to get rid of a few warnings --with-debug on
230 * Windows, I've introduced a new type "jb_socket". This is
231 * used for the socket file descriptors. On Windows, this
232 * is SOCKET (a typedef for unsigned). Everywhere else, it's
233 * an int. The error value can't be -1 any more, so it's
234 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
235 * Windows it maps to the #define INVALID_SOCKET.)
237 * - The signature of bind_port has changed.
239 * Revision 1.78 2002/03/08 21:35:04 oes
240 * Added optional group supplement to --user option. Will now use default group of user if no group given
242 * Revision 1.77 2002/03/07 03:52:06 oes
243 * - Fixed compiler warnings etc
244 * - Improved handling of failed DNS lookups
246 * Revision 1.76 2002/03/06 22:54:35 jongfoster
247 * Automated function-comment nitpicking.
249 * Revision 1.75 2002/03/06 10:02:19 oes
250 * Fixed stupid bug when --user was not given
252 * Revision 1.74 2002/03/06 00:49:31 jongfoster
253 * Fixing warning on Windows
254 * Making #ifdefs that refer to the same variable consistently
255 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
257 * Revision 1.73 2002/03/05 23:57:30 hal9
258 * Stray character 's' on line 1618 was breaking build.
260 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
261 * - Re-enable OS/2 building after new parms were added
262 * - Fix false out of memory report when resolving CGI templates when no IP
263 * address is available of failed attempt (a la no such domain)
265 * Revision 1.71 2002/03/05 18:13:56 oes
266 * Added --user option
268 * Revision 1.70 2002/03/05 04:52:42 oes
269 * Deleted non-errlog debugging code
271 * Revision 1.69 2002/03/04 23:50:00 jongfoster
272 * Splitting off bind_port() call into bind_port_helper(), with
275 * Revision 1.68 2002/03/04 20:17:32 oes
278 * Revision 1.67 2002/03/04 18:18:57 oes
279 * - Removed _DEBUG mode
280 * - Cleand up cmdline parsing
281 * - Introduced --no-daemon, --pidfile options
282 * - Cleaned up signal handling:
283 * - Terminate cleanly on INT, TERM and ABRT
284 * - Schedule logfile for re-opening on HUP
285 * - Ignore CHLD and PIPE
286 * - Leave the rest with their default handlers
287 * - Uniform handler registration
288 * - Added usage() function
289 * - Played styleguide police
291 * Revision 1.66 2002/03/03 15:06:55 oes
292 * Re-enabled automatic config reloading
294 * Revision 1.65 2002/03/03 14:49:11 oes
295 * Fixed CLF logging: Now uses client's original HTTP request
297 * Revision 1.64 2002/03/03 09:18:03 joergs
298 * Made jumbjuster work on AmigaOS again.
300 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
301 * Clean up a little CRLF unpleasantness that suddenly appeared
303 * Revision 1.62 2002/02/20 23:17:23 jongfoster
304 * Detecting some out-of memory conditions and exiting with a log message.
306 * Revision 1.61 2002/01/17 21:01:52 jongfoster
307 * Moving all our URL and URL pattern parsing code to urlmatch.c.
309 * Revision 1.60 2001/12/30 14:07:32 steudten
310 * - Add signal handling (unix)
311 * - Add SIGHUP handler (unix)
312 * - Add creation of pidfile (unix)
313 * - Add action 'top' in rc file (RH)
314 * - Add entry 'SIGNALS' to manpage
315 * - Add exit message to logfile (unix)
317 * Revision 1.59 2001/12/13 14:07:18 oes
318 * Fixed Bug: 503 error page now sent OK
320 * Revision 1.58 2001/11/30 23:37:24 jongfoster
321 * Renaming the Win32 config file to config.txt - this is almost the
322 * same as the corresponding UNIX name "config"
324 * Revision 1.57 2001/11/16 00:47:43 jongfoster
325 * Changing the tty-disconnection code to use setsid().
327 * Revision 1.56 2001/11/13 20:20:54 jongfoster
328 * Tabs->spaces, fixing a bug with missing {} around an if()
330 * Revision 1.55 2001/11/13 20:14:53 jongfoster
331 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
333 * Revision 1.54 2001/11/07 00:03:14 steudten
334 * Give reliable return value if an error
335 * occurs not just 0 with new daemon mode.
337 * Revision 1.53 2001/11/05 21:41:43 steudten
338 * Add changes to be a real daemon just for unix os.
339 * (change cwd to /, detach from controlling tty, set
340 * process group and session leader to the own process.
342 * Add some fatal-error log message for failed malloc().
343 * Add '-d' if compiled with 'configure --with-debug' to
344 * enable debug output.
346 * Revision 1.52 2001/10/26 20:11:20 jongfoster
347 * Fixing type mismatch
349 * Revision 1.51 2001/10/26 17:38:28 oes
352 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
353 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
354 * threads to call select() simultaneously. So, it's time to do a real, live,
355 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
356 * (native). Both versions will work, but using __OS2__ offers multi-threading.
358 * Revision 1.49 2001/10/23 21:41:35 jongfoster
359 * Added call to initialize the (statically-allocated of course)
360 * "out of memory" CGI response.
362 * Revision 1.48 2001/10/10 19:56:46 jongfoster
363 * Moving some code that wasn't cookie-related out of an #ifdef
366 * Revision 1.47 2001/10/10 16:44:36 oes
367 * Added CONNECT destination port limitation check
369 * Revision 1.46 2001/10/08 15:17:41 oes
370 * Re-enabled SSL forwarding
372 * Revision 1.45 2001/10/07 15:42:11 oes
373 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
375 * Moved downgrading of the HTTP version from parse_http_request to
376 * chat(), since we can't decide if it is necessary before we have
377 * determined the actions for the URL. The HTTP command is now
378 * *always* re-built so the repairs need no longer be special-cased.
380 * filter_popups now gets a csp pointer so it can raise the new
381 * CSP_FLAG_MODIFIED flag.
385 * Added configurable size limit for the IOB. If the IOB grows so
386 * large that the next read would exceed the limit, the header
387 * is generated, and the header & unfiltered buffer are flushed
388 * to the client. Chat then continues in non-buffering,
389 * non-filtering body mode.
391 * Revision 1.44 2001/10/02 18:13:57 oes
394 * Revision 1.43 2001/10/02 15:32:13 oes
395 * Moved generation of hdr
397 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
398 * Cleaning up 2 compiler warnings on OS/2.
400 * Revision 1.41 2001/09/16 17:05:14 jongfoster
401 * Removing unused #include showarg.h
403 * Revision 1.40 2001/09/16 15:41:45 jongfoster
404 * Fixing signed/unsigned comparison warning.
406 * Revision 1.39 2001/09/16 13:21:27 jongfoster
407 * Changes to use new list functions.
409 * Revision 1.38 2001/09/16 13:01:46 jongfoster
410 * Removing redundant function call that zeroed zalloc()'d memory.
412 * Revision 1.37 2001/09/10 11:12:24 oes
413 * Deleted unused variable
415 * Revision 1.36 2001/09/10 10:56:15 oes
416 * Silenced compiler warnings
418 * Revision 1.35 2001/07/31 14:44:22 oes
419 * Deleted unused size parameter from filter_popups()
421 * Revision 1.34 2001/07/30 22:08:36 jongfoster
422 * Tidying up #defines:
423 * - All feature #defines are now of the form FEATURE_xxx
424 * - Permanently turned off WIN_GUI_EDIT
425 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
427 * Revision 1.33 2001/07/29 19:32:00 jongfoster
428 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
430 * Revision 1.32 2001/07/29 18:47:05 jongfoster
431 * Adding missing #include "loadcfg.h"
433 * Revision 1.31 2001/07/29 12:17:48 oes
434 * Applied pthread fix by Paul Lieverse
436 * Revision 1.30 2001/07/25 22:57:13 jongfoster
437 * __BEOS__ no longer overrides FEATURE_PTHREAD.
438 * This is because FEATURE_PTHREAD will soon be widely used, so I
439 * want to keep it simple.
441 * Revision 1.29 2001/07/24 12:47:06 oes
442 * Applied BeOS support update by Eugenia
444 * Revision 1.28 2001/07/23 13:26:12 oes
445 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
447 * Revision 1.27 2001/07/19 19:09:47 haroon
448 * - Added code to take care of the situation where while processing the first
449 * server response (which includes the server header), after finding the end
450 * of the headers we were not looking past the end of the headers for
451 * content modification. I enabled it for filter_popups.
452 * Someone else should look to see if other similar operations should be
453 * done to the discarded portion of the buffer.
455 * Note 2001/07/20: No, the other content modification mechanisms will process
456 * the whole iob later anyway. --oes
458 * Revision 1.26 2001/07/18 12:31:36 oes
461 * Revision 1.25 2001/07/15 19:43:49 jongfoster
462 * Supports POSIX threads.
463 * Also removed some unused #includes.
465 * Revision 1.24 2001/07/13 14:00:40 oes
466 * - Generic content modification scheme:
467 * Each feature has its own applicability flag that is set
468 * from csp->action->flags.
469 * Replaced the "filtering" int flag , by a function pointer
470 * "content_filter" to the function that will do the content
471 * modification. If it is != NULL, the document will be buffered
472 * and processed through *content_filter, which must set
473 * csp->content_length and return a modified copy of the body
474 * or return NULL (on failiure).
475 * - Changed csp->is_text to the more generic bitmap csp->content_type
476 * which can currently take the valued CT_TEXT or CT_GIF
478 * - Removed all #ifdef PCRS
480 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
481 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
482 * the `block_acl' call. This prevents a compilation error when the user
483 * does not wish to use the "ACL" feature.
485 * Revision 1.22 2001/06/29 21:45:41 oes
486 * Indentation, CRLF->LF, Tab-> Space
488 * Revision 1.21 2001/06/29 13:29:36 oes
489 * - Cleaned up, improved comments
490 * - Unified all possible interceptors (CGI,
491 * block, trust, fast_redirect) in one
492 * place, with one (CGI) answer generation
493 * mechansim. Much clearer now.
494 * - Removed the GIF image generation, which
495 * is now done in filters.c:block_url()
496 * - Made error conditions like domain lookup
497 * failiure or (various) problems while talking
498 * to the server use cgi.c:error_response()
499 * instead of generating HTML/HTTP in chat() (yuck!)
500 * - Removed logentry from cancelled commit
502 * Revision 1.20 2001/06/09 10:55:28 jongfoster
503 * Changing BUFSIZ ==> BUFFER_SIZE
505 * Revision 1.19 2001/06/07 23:12:52 jongfoster
506 * Replacing function pointer in struct gateway with a directly
507 * called function forwarded_connect().
508 * Replacing struct gateway with struct forward_spec
510 * Revision 1.18 2001/06/03 19:12:16 oes
511 * introduced new cgi handling
513 * Revision 1.17 2001/06/01 20:07:23 jongfoster
514 * Now uses action +image-blocker{} rather than config->tinygif
516 * Revision 1.16 2001/06/01 18:49:17 jongfoster
517 * Replaced "list_share" with "list" - the tiny memory gain was not
518 * worth the extra complexity.
520 * Revision 1.15 2001/05/31 21:24:47 jongfoster
521 * Changed "permission" to "action" throughout.
522 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
523 * Moved vanilla wafer check into chat(), since we must now
524 * decide whether or not to add it based on the URL.
526 * Revision 1.14 2001/05/29 20:14:01 joergs
527 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
530 * Revision 1.13 2001/05/29 09:50:24 jongfoster
531 * Unified blocklist/imagelist/permissionslist.
532 * File format is still under discussion, but the internal changes
535 * Also modified interceptor behaviour:
536 * - We now intercept all URLs beginning with one of the following
537 * prefixes (and *only* these prefixes):
539 * * http://ijbswa.sf.net/config/
540 * * http://ijbswa.sourceforge.net/config/
541 * - New interceptors "home page" - go to http://i.j.b/ to see it.
542 * - Internal changes so that intercepted and fast redirect pages
543 * are not replaced with an image.
544 * - Interceptors now have the option to send a binary page direct
545 * to the client. (i.e. ijb-send-banner uses this)
546 * - Implemented show-url-info interceptor. (Which is why I needed
547 * the above interceptors changes - a typical URL is
548 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
549 * The previous mechanism would not have intercepted that, and
550 * if it had been intercepted then it then it would have replaced
553 * Revision 1.12 2001/05/27 22:17:04 oes
555 * - re_process_buffer no longer writes the modified buffer
556 * to the client, which was very ugly. It now returns the
557 * buffer, which it is then written by chat.
559 * - content_length now adjusts the Content-Length: header
560 * for modified documents rather than crunch()ing it.
561 * (Length info in csp->content_length, which is 0 for
562 * unmodified documents)
564 * - For this to work, sed() is called twice when filtering.
566 * Revision 1.11 2001/05/26 17:27:53 jongfoster
567 * Added support for CLF and fixed LOG_LEVEL_LOG.
568 * Also did CRLF->LF fix of my previous patch.
570 * Revision 1.10 2001/05/26 15:26:15 jongfoster
571 * ACL feature now provides more security by immediately dropping
572 * connections from untrusted hosts.
574 * Revision 1.9 2001/05/26 00:28:36 jongfoster
575 * Automatic reloading of config file.
576 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
577 * Most of the global variables have been moved to a new
578 * struct configuration_spec, accessed through csp->config->globalname
579 * Most of the globals remaining are used by the Win32 GUI.
581 * Revision 1.8 2001/05/25 22:43:18 jongfoster
582 * Fixing minor memory leak and buffer overflow.
584 * Revision 1.7 2001/05/25 22:34:30 jongfoster
587 * Revision 1.6 2001/05/23 00:13:58 joergs
588 * AmigaOS support fixed.
590 * Revision 1.5 2001/05/22 18:46:04 oes
592 * - Enabled filtering banners by size rather than URL
593 * by adding patterns that replace all standard banner
594 * sizes with the "Junkbuster" gif to the re_filterfile
596 * - Enabled filtering WebBugs by providing a pattern
597 * which kills all 1x1 images
599 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
600 * which is selected by the (nonstandard and therefore
601 * capital) letter 'U' in the option string.
602 * It causes the quantifiers to be ungreedy by default.
603 * Appending a ? turns back to greedy (!).
605 * - Added a new interceptor ijb-send-banner, which
606 * sends back the "Junkbuster" gif. Without imagelist or
607 * MSIE detection support, or if tinygif = 1, or the
608 * URL isn't recognized as an imageurl, a lame HTML
609 * explanation is sent instead.
611 * - Added new feature, which permits blocking remote
612 * script redirects and firing back a local redirect
614 * The feature is conditionally compiled, i.e. it
615 * can be disabled with --disable-fast-redirects,
616 * plus it must be activated by a "fast-redirects"
617 * line in the config file, has its own log level
618 * and of course wants to be displayed by show-proxy-args
619 * Note: Boy, all the #ifdefs in 1001 locations and
620 * all the fumbling with configure.in and acconfig.h
621 * were *way* more work than the feature itself :-(
623 * - Because a generic redirect template was needed for
624 * this, tinygif = 3 now uses the same.
626 * - Moved GIFs, and other static HTTP response templates
631 * - Removed some >400 CRs again (Jon, you really worked
634 * Revision 1.4 2001/05/21 19:34:01 jongfoster
635 * Made failure to bind() a fatal error.
637 * Revision 1.3 2001/05/20 01:21:20 jongfoster
638 * Version 2.9.4 checkin.
639 * - Merged popupfile and cookiefile, and added control over PCRS
640 * filtering, in new "permissionsfile".
641 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
642 * file error you now get a message box (in the Win32 GUI) rather
643 * than the program exiting with no explanation.
644 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
646 * - Removed tabs from "config"
647 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
648 * - Bumped up version number.
650 * Revision 1.2 2001/05/17 22:34:44 oes
651 * - Added hint on GIF char array generation to jcc.c
652 * - Cleaned CRLF's from the sources and related files
653 * - Repaired logging for REF and FRC
655 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
656 * Initial import of version 2.9.3 source tree
659 *********************************************************************/
665 #include <sys/types.h>
672 #ifdef FEATURE_PTHREAD
674 #endif /* def FEATURE_PTHREAD */
677 # ifndef FEATURE_PTHREAD
681 # include <windows.h>
682 # include <process.h>
683 # endif /* ndef FEATURE_PTHREAD */
686 # ifndef _WIN_CONSOLE
688 # endif /* ndef _WIN_CONSOLE */
689 # include "w32svrapi.h"
691 #else /* ifndef _WIN32 */
693 # if !defined (__OS2__)
695 # include <sys/wait.h>
696 # endif /* ndef __OS2__ */
697 # include <sys/time.h>
698 # include <sys/stat.h>
699 # include <sys/ioctl.h>
702 #include <sys/termios.h>
713 # include <socket.h> /* BeOS has select() for sockets only. */
714 # include <OS.h> /* declarations for threads and stuff. */
717 # if defined(__EMX__) || defined(__OS2__)
718 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
723 #define bzero(B,N) memset(B,0x00,n)
738 #include "killpopup.h"
739 #include "miscutil.h"
741 #include "jbsockets.h"
746 #include "urlmatch.h"
748 const char jcc_h_rcs[] = JCC_H_VERSION;
749 const char project_h_rcs[] = PROJECT_H_VERSION;
752 struct client_state clients[1];
753 struct file_list files[1];
755 #ifdef FEATURE_STATISTICS
756 int urls_read = 0; /* total nr of urls read inc rejected */
757 int urls_rejected = 0; /* total nr of urls rejected */
758 #endif /* def FEATURE_STATISTICS */
760 #ifdef FEATURE_GRACEFUL_TERMINATION
764 static void listen_loop(void);
765 static void chat(struct client_state *csp);
767 void serve(struct client_state *csp);
768 #else /* ifndef AMIGA */
769 static void serve(struct client_state *csp);
770 #endif /* def AMIGA */
773 static int32 server_thread(void *data);
774 #endif /* def __BEOS__ */
777 #define sleep(N) Sleep(((N) * 1000))
781 #define sleep(N) DosSleep(((N) * 100))
784 #if defined(OSX_DARWIN) || defined(__OpenBSD__)
787 * Hit OSX over the head with a hammer. Protect all *_r functions.
789 pthread_mutex_t gmtime_mutex;
790 pthread_mutex_t localtime_mutex;
791 #endif /* def OSX_DARWIN */
793 * Protect only the resolve functions for OpenBSD.
795 pthread_mutex_t gethostbyaddr_mutex;
796 pthread_mutex_t gethostbyname_mutex;
797 #endif /* defined(OSX_DARWIN) || defined(__OpenBSD__) */
799 #ifdef FEATURE_PTHREAD
800 pthread_mutex_t log_mutex;
801 pthread_mutex_t log_init_mutex;
802 #endif /* FEATURE_PTHREAD */
804 #if defined(unix) || defined(__EMX__)
805 const char *basedir = NULL;
806 const char *pidfile = NULL;
807 int received_hup_signal = 0;
808 #endif /* defined unix */
810 /* The vanilla wafer. */
811 static const char VANILLA_WAFER[] =
812 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
813 "Do_not_send_me_any_copyrighted_information_other_than_the_"
814 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
815 "In_particular_do_not_send_me_any_cookies_that_"
816 "are_subject_to_a_claim_of_copyright_by_anybody._"
817 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
818 "(copyright_or_otherwise)_applying_to_any_cookie._";
821 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
822 /*********************************************************************
824 * Function : sig_handler
826 * Description : Signal handler for different signals.
827 * Exit gracefully on ABRT, TERM and INT
828 * or set a flag that will cause the errlog
829 * to be reopened by the main thread on HUP.
832 * 1 : the_signal = the signal cause this function to call
836 *********************************************************************/
837 static void sig_handler(int the_signal)
844 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
852 received_hup_signal = 1;
857 * We shouldn't be here, unless we catch signals
858 * in main() that we can't handle here!
860 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
868 /*********************************************************************
872 * Description : Once a connection to the client has been accepted,
873 * this function is called (via serve()) to handle the
874 * main business of the communication. When this
875 * function returns, the caller must close the client
879 * 1 : csp = Current client state (buffers, headers, etc...)
881 * Returns : On success, the number of bytes written are returned (zero
882 * indicates nothing was written). On error, -1 is returned,
883 * and errno is set appropriately. If count is zero and the
884 * file descriptor refers to a regular file, 0 will be
885 * returned without causing any other effect. For a special
886 * file, the results are not portable.
888 *********************************************************************/
889 static void chat(struct client_state *csp)
892 * This next lines are a little ugly, but they simplifies the if statements
893 * below. Basically if TOGGLE, then we want the if to test if the
894 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
895 * then we want the if to test for CSP_FLAG_FORCED , else we don't
897 #ifdef FEATURE_TOGGLE
898 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
899 #else /* ifndef FEATURE_TOGGLE */
900 # define IS_TOGGLED_ON_AND
901 #endif /* ndef FEATURE_TOGGLE */
902 #ifdef FEATURE_FORCE_LOAD
903 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
904 #else /* ifndef FEATURE_FORCE_LOAD */
905 # define IS_NOT_FORCED_AND
906 #endif /* def FEATURE_FORCE_LOAD */
908 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
910 char buf[BUFFER_SIZE];
918 int ms_iis5_hack = 0;
920 unsigned int forwarded_connect_retries = 0;
921 unsigned int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
922 const struct forward_spec * fwd;
923 struct http_request *http;
924 int len; /* for buffer sizes */
925 #ifdef FEATURE_KILL_POPUPS
926 int block_popups; /* bool, 1==will block popups */
927 int block_popups_now = 0; /* bool, 1==currently blocking popups */
928 #endif /* def FEATURE_KILL_POPUPS */
930 int pcrs_filter; /* bool, 1==will filter through pcrs */
931 int gif_deanimate; /* bool, 1==will deanimate gifs */
932 int jpeg_inspect; /* bool, 1==will inspect jpegs */
934 /* Function that does the content filtering for the current request */
935 char *(*content_filter)() = NULL;
937 /* Skeleton for HTTP response, if we should intercept the request */
938 struct http_response *rsp;
943 * Read the client's request. Note that since we're not using select() we
944 * could get blocked here if a client connected, then didn't say anything!
949 len = read_socket(csp->cfd, buf, sizeof(buf));
951 if (len <= 0) break; /* error! */
954 * If there is no memory left for buffering the
955 * request, there is nothing we can do but hang up
957 if (add_to_iob(csp, buf, len))
962 req = get_header(csp);
966 break; /* no HTTP request! */
971 continue; /* more to come! */
974 #ifdef FEATURE_FORCE_LOAD
975 /* If this request contains the FORCE_PREFIX,
976 * better get rid of it now and set the force flag --oes
979 if (strstr(req, FORCE_PREFIX))
981 strclean(req, FORCE_PREFIX);
982 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
983 csp->flags |= CSP_FLAG_FORCED;
986 #endif /* def FEATURE_FORCE_LOAD */
988 parse_http_request(req, http, csp);
993 if (http->cmd == NULL)
995 strcpy(buf, CHEADER);
996 write_socket(csp->cfd, buf, strlen(buf));
998 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
1000 free_http_request(http);
1004 if (!strncmpic(http->cmd, "GET ftp://", 10))
1006 strcpy(buf, FTP_RESPONSE);
1007 write_socket(csp->cfd, buf, strlen(buf));
1009 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as FTP proxy: %s",
1010 csp->ip_addr_str, http->cmd);
1012 free_http_request(http);
1016 /* decide how to route the HTTP request */
1018 if ((fwd = forward_url(http, csp)) == NULL)
1020 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1021 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1024 /* build the http request to send to the server
1025 * we have to do one of the following:
1027 * create = use the original HTTP request to create a new
1028 * HTTP request that has either the path component
1029 * without the http://domainspec (w/path) or the
1030 * full orininal URL (w/url)
1031 * Note that the path and/or the HTTP version may
1032 * have been altered by now.
1034 * connect = Open a socket to the host:port of the server
1035 * and short-circuit server and client socket.
1037 * pass = Pass the request unchanged if forwarding a CONNECT
1038 * request to a parent proxy. Note that we'll be sending
1039 * the CFAIL message ourselves if connecting to the parent
1040 * fails, but we won't send a CSUCCEED message if it works,
1041 * since that would result in a double message (ours and the
1042 * parent's). After sending the request to the parent, we simply
1045 * here's the matrix:
1048 * +--------+--------+
1050 * 0 | create | connect|
1052 * Forwarding +--------+--------+
1054 * 1 | create | pass |
1056 * +--------+--------+
1061 * Determine the actions for this URL
1063 #ifdef FEATURE_TOGGLE
1064 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1066 /* Most compatible set of actions (i.e. none) */
1067 init_current_action(csp->action);
1070 #endif /* ndef FEATURE_TOGGLE */
1072 url_actions(http, csp);
1077 * Check if a CONNECT request is allowable:
1078 * In the absence of a +limit-connect action, allow only port 443.
1079 * If there is an action, allow whatever matches the specificaton.
1083 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
1084 || (csp->action->flags & ACTION_LIMIT_CONNECT
1085 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
1087 if (csp->action->flags & ACTION_TREAT_FORBIDDEN_CONNECTS_LIKE_BLOCKS)
1089 /* The response will violate the specs, but makes unblocking easier. */
1090 log_error(LOG_LEVEL_ERROR, "Marking suspicious CONNECT request from %s for blocking.",
1092 csp->action->flags |= ACTION_BLOCK;
1097 strcpy(buf, CFORBIDDEN);
1098 write_socket(csp->cfd, buf, strlen(buf));
1099 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
1100 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
1108 * Downgrade http version from 1.1 to 1.0 if +downgrade
1111 if ( (http->ssl == 0)
1112 && (!strcmpic(http->ver, "HTTP/1.1"))
1113 && (csp->action->flags & ACTION_DOWNGRADE))
1116 http->ver = strdup("HTTP/1.0");
1118 if (http->ver == NULL)
1120 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1125 * Save a copy of the original request for logging
1127 http->ocmd = strdup(http->cmd);
1129 if (http->ocmd == NULL)
1131 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
1135 * (Re)build the HTTP request for non-SSL requests.
1136 * If forwarding, use the whole URL, else, use only the path.
1142 http->cmd = strdup(http->gpc);
1143 string_append(&http->cmd, " ");
1145 if (fwd->forward_host)
1147 string_append(&http->cmd, http->url);
1151 string_append(&http->cmd, http->path);
1153 string_append(&http->cmd, " ");
1154 string_append(&http->cmd, http->ver);
1156 if (http->cmd == NULL)
1158 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1160 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", http->cmd);
1162 enlist(csp->headers, http->cmd);
1166 * If the user has not supplied any wafers, and the user has not
1167 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1169 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1170 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1172 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1176 #ifdef FEATURE_KILL_POPUPS
1177 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
1178 #endif /* def FEATURE_KILL_POPUPS */
1180 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
1181 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
1183 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
1185 jpeg_inspect = ((csp->action->flags & ACTION_JPEG_INSPECT) != 0);
1187 /* grab the rest of the client's headers */
1191 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1193 len = read_socket(csp->cfd, buf, sizeof(buf));
1196 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1201 * If there is no memory left for buffering the
1202 * request, there is nothing we can do but hang up
1204 if (add_to_iob(csp, buf, len))
1211 if (p == NULL) break;
1213 enlist(csp->headers, p);
1218 * We have a request. Now, check to see if we need to
1219 * intercept it, i.e. If ..
1223 /* We may not forward the request by rfc2616 sect 14.31 */
1224 (NULL != (rsp = direct_response(csp)))
1226 /* or a CGI call was detected and answered */
1227 || (NULL != (rsp = dispatch_cgi(csp)))
1229 /* or we are enabled and... */
1230 || (IS_ENABLED_AND (
1232 /* ..the request was blocked */
1233 ( NULL != (rsp = block_url(csp)))
1235 /* ..or untrusted */
1236 #ifdef FEATURE_TRUST
1237 || ( NULL != (rsp = trust_url(csp)))
1238 #endif /* def FEATURE_TRUST */
1240 /* ..or a fast redirect kicked in */
1241 #ifdef FEATURE_FAST_REDIRECTS
1242 || ( NULL != (rsp = redirect_url(csp)))
1243 #endif /* def FEATURE_FAST_REDIRECTS */
1247 /* Write the answer to the client */
1248 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1249 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1251 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1254 #ifdef FEATURE_STATISTICS
1255 /* Count as a rejected request */
1256 csp->flags |= CSP_FLAG_REJECTED;
1257 #endif /* def FEATURE_STATISTICS */
1259 /* Log (FIXME: All intercept reasons appear as "crunch" with Status 200) */
1260 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
1261 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
1263 /* Clean up and return */
1264 free_http_response(rsp);
1268 hdr = sed(client_patterns, add_client_headers, csp);
1271 /* FIXME Should handle error properly */
1272 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1275 list_remove_all(csp->headers);
1277 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1279 if (fwd->forward_host)
1281 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1282 fwd->forward_host, fwd->forward_port, http->hostport);
1286 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1289 /* here we connect to the server, gateway, or the forwarder */
1291 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
1292 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
1294 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
1295 forwarded_connect_retries, http->hostport);
1298 if (csp->sfd == JB_INVALID_SOCKET)
1300 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1303 if (errno == EINVAL)
1305 rsp = error_response(csp, "no-such-domain", errno);
1307 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
1308 csp->ip_addr_str, http->ocmd);
1312 rsp = error_response(csp, "connect-failed", errno);
1314 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1315 csp->ip_addr_str, http->ocmd);
1319 /* Write the answer to the client */
1322 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1323 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1325 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1329 free_http_response(rsp);
1334 log_error(LOG_LEVEL_CONNECT, "OK");
1336 if (fwd->forward_host || (http->ssl == 0))
1338 /* write the client's (modified) header to the server
1339 * (along with anything else that may be in the buffer)
1342 if (write_socket(csp->sfd, hdr, strlen(hdr))
1343 || (flush_socket(csp->sfd, csp) < 0))
1345 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1348 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1349 csp->ip_addr_str, http->ocmd);
1351 rsp = error_response(csp, "connect-failed", errno);
1355 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1356 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1358 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1362 free_http_response(rsp);
1370 * We're running an SSL tunnel and we're not forwarding,
1371 * so just send the "connect succeeded" message to the
1372 * client, flush the rest, and get out of the way.
1374 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1375 csp->ip_addr_str, http->ocmd);
1377 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
1385 /* we're finished with the client's header */
1388 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1390 /* pass data between the client and server
1391 * until one or the other shuts down the connection.
1400 * FD_ZERO here seems to point to an errant macro which crashes.
1401 * So do this by hand for now...
1403 memset(&rfds,0x00,sizeof(fd_set));
1407 FD_SET(csp->cfd, &rfds);
1408 FD_SET(csp->sfd, &rfds);
1410 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
1414 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1418 /* this is the body of the browser's request
1419 * just read it and write it.
1422 if (FD_ISSET(csp->cfd, &rfds))
1424 len = read_socket(csp->cfd, buf, sizeof(buf));
1428 break; /* "game over, man" */
1431 if (write_socket(csp->sfd, buf, (size_t)len))
1433 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1440 * The server wants to talk. It could be the header or the body.
1441 * If `hdr' is null, then it's the header otherwise it's the body.
1442 * FIXME: Does `hdr' really mean `host'? No.
1446 if (FD_ISSET(csp->sfd, &rfds))
1449 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1453 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1455 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1456 csp->ip_addr_str, http->ocmd);
1458 rsp = error_response(csp, "connect-failed", errno);
1462 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1463 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1465 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1469 free_http_response(rsp);
1473 /* Add a trailing zero. This lets filter_popups
1474 * use string operations.
1478 #ifdef FEATURE_KILL_POPUPS
1479 /* Filter the popups on this read. */
1480 if (block_popups_now)
1482 filter_popups(buf, csp);
1484 #endif /* def FEATURE_KILL_POPUPS */
1486 /* Normally, this would indicate that we've read
1487 * as much as the server has sent us and we can
1488 * close the client connection. However, Microsoft
1489 * in its wisdom has released IIS/5 with a bug that
1490 * prevents it from sending the trailing \r\n in
1491 * a 302 redirect header (and possibly other headers).
1492 * To work around this if we've haven't parsed
1493 * a full header we'll append a trailing \r\n
1494 * and see if this now generates a valid one.
1496 * This hack shouldn't have any impacts. If we've
1497 * already transmitted the header or if this is a
1498 * SSL connection, then we won't bother with this
1499 * hack. So we only work on partially received
1500 * headers. If we append a \r\n and this still
1501 * doesn't generate a valid header, then we won't
1502 * transmit anything to the client.
1507 if (server_body || http->ssl)
1510 * If we have been buffering up the document,
1511 * now is the time to apply content modification
1512 * and send the result to the client.
1517 * If the content filter fails, use the original
1518 * buffer and length.
1519 * (see p != NULL ? p : csp->iob->cur below)
1521 if (NULL == (p = (*content_filter)(csp)))
1523 csp->content_length = csp->iob->eod - csp->iob->cur;
1526 hdr = sed(server_patterns_light, NULL, csp);
1530 /* FIXME Should handle error properly */
1531 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1534 if (write_socket(csp->cfd, hdr, strlen(hdr))
1535 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
1537 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1547 break; /* "game over, man" */
1551 * This is NOT the body, so
1552 * Let's pretend the server just sent us a blank line.
1554 len = sprintf(buf, "\r\n");
1557 * Now, let the normal header parsing algorithm below do its
1558 * job. If it fails, we'll exit instead of continuing.
1565 * If this is an SSL connection or we're in the body
1566 * of the server document, just write it to the client,
1567 * unless we need to buffer the body for later content-filtering
1570 if (server_body || http->ssl)
1575 * If there is no memory left for buffering the content, or the buffer limit
1576 * has been reached, switch to non-filtering mode, i.e. make & write the
1577 * header, flush the iob and buf, and get out of the way.
1579 if (add_to_iob(csp, buf, len))
1584 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
1586 hdr = sed(server_patterns, add_server_headers, csp);
1590 * Memory is too tight to even generate the header.
1591 * Send our static "Out-of-memory" page.
1593 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
1594 rsp = cgi_error_memory();
1596 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1597 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1599 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1604 hdrlen = strlen(hdr);
1606 if (write_socket(csp->cfd, hdr, hdrlen)
1607 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
1608 || (write_socket(csp->cfd, buf, (size_t) len)))
1610 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
1616 byte_count += hdrlen + flushed + len;
1618 content_filter = NULL;
1625 if (write_socket(csp->cfd, buf, (size_t)len))
1627 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
1636 /* we're still looking for the end of the
1637 * server's header ... (does that make header
1638 * parsing an "out of body experience" ?
1642 * buffer up the data we just read. If that fails,
1643 * there's little we can do but send our static
1644 * out-of-memory page.
1646 if (add_to_iob(csp, buf, len))
1648 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
1649 rsp = cgi_error_memory();
1651 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1652 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1654 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1659 /* get header lines from the iob */
1661 while ((p = get_header(csp)) != NULL)
1665 /* see following note */
1668 enlist(csp->headers, p);
1672 /* NOTE: there are no "empty" headers so
1673 * if the pointer `p' is not NULL we must
1674 * assume that we reached the end of the
1675 * buffer before we hit the end of the header.
1682 /* Well, we tried our MS IIS/5
1683 * hack and it didn't work.
1684 * The header is incomplete
1685 * and there isn't anything
1686 * we can do about it.
1692 /* Since we have to wait for
1693 * more from the server before
1694 * we can parse the headers
1695 * we just continue here.
1701 /* we have now received the entire header.
1702 * filter it and send the result to the client
1705 hdr = sed(server_patterns, add_server_headers, csp);
1708 /* FIXME Should handle error properly */
1709 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1712 #ifdef FEATURE_KILL_POPUPS
1713 /* Start blocking popups if appropriate. */
1715 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1716 !http->ssl && /* We talk plaintext */
1717 block_popups) /* Policy allows */
1719 block_popups_now = 1;
1721 * Filter the part of the body that came in the same read
1722 * as the last headers:
1724 filter_popups(csp->iob->cur, csp);
1727 #endif /* def FEATURE_KILL_POPUPS */
1729 /* Buffer and pcrs filter this if appropriate. */
1731 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1732 !http->ssl && /* We talk plaintext */
1733 pcrs_filter) /* Policy allows */
1735 content_filter = pcrs_filter_response;
1738 /* Buffer and gif_deanimate this if appropriate. */
1740 if ((csp->content_type & CT_GIF) && /* It's an image/gif MIME-Type */
1741 !http->ssl && /* We talk plaintext */
1742 gif_deanimate) /* Policy allows */
1744 content_filter = gif_deanimate_response;
1747 /* Buffer and jpg_inspect this if appropriate. */
1749 if ((csp->content_type & CT_JPEG) && /* It's an image/jpeg MIME-Type */
1750 !http->ssl && /* We talk plaintext */
1751 jpeg_inspect) /* Policy allows */
1753 content_filter = jpeg_inspect_response;
1757 * Only write if we're not buffering for content modification
1759 if (!content_filter)
1761 /* write the server's (modified) header to
1762 * the client (along with anything else that
1763 * may be in the buffer)
1766 if (write_socket(csp->cfd, hdr, strlen(hdr))
1767 || ((len = flush_socket(csp->cfd, csp)) < 0))
1769 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1771 /* the write failed, so don't bother
1772 * mentioning it to the client...
1773 * it probably can't hear us anyway.
1782 /* we're finished with the server's header */
1787 /* If this was a MS IIS/5 hack then it means
1788 * the server has already closed the
1789 * connection. Nothing more to read. Time
1800 return; /* huh? we should never get here */
1803 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
1804 csp->ip_addr_str, http->ocmd, byte_count);
1808 /*********************************************************************
1812 * Description : This is little more than chat. We only "serve" to
1813 * to close any socket that chat may have opened.
1816 * 1 : csp = Current client state (buffers, headers, etc...)
1820 *********************************************************************/
1822 void serve(struct client_state *csp)
1823 #else /* ifndef AMIGA */
1824 static void serve(struct client_state *csp)
1825 #endif /* def AMIGA */
1828 close_socket(csp->cfd);
1830 if (csp->sfd != JB_INVALID_SOCKET)
1832 close_socket(csp->sfd);
1835 csp->flags &= ~CSP_FLAG_ACTIVE;
1841 /*********************************************************************
1843 * Function : server_thread
1845 * Description : We only exist to call `serve' in a threaded environment.
1848 * 1 : data = Current client state (buffers, headers, etc...)
1850 * Returns : Always 0.
1852 *********************************************************************/
1853 static int32 server_thread(void *data)
1855 serve((struct client_state *) data);
1862 /*********************************************************************
1866 * Description : Print usage info & exit.
1868 * Parameters : Pointer to argv[0] for identifying ourselves
1872 *********************************************************************/
1873 void usage(const char *myname)
1875 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
1877 "Usage: %s [--help] [--version] [configfile]\n"
1879 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
1881 "Aborting.\n", myname);
1888 /*********************************************************************
1892 * Description : Load the config file and start the listen loop.
1893 * This function is a lot more *sane* with the `load_config'
1894 * and `listen_loop' functions; although it stills does
1895 * a *little* too much for my taste.
1898 * 1 : argc = Number of parameters (including $0).
1899 * 2 : argv = Array of (char *)'s to the parameters.
1901 * Returns : 1 if : can't open config file, unrecognized directive,
1902 * stats requested in multi-thread mode, can't open the
1903 * log file, can't open the jar file, listen port is invalid,
1904 * any load fails, and can't bind port.
1906 * Else main never returns, the process must be signaled
1907 * to terminate execution. Or, on Windows, use the
1908 * "File", "Exit" menu option.
1910 *********************************************************************/
1912 int real_main(int argc, const char *argv[])
1914 int main(int argc, const char *argv[])
1919 unsigned int random_seed;
1920 #endif /* ifdef HAVE_RANDOM */
1922 struct passwd *pw = NULL;
1923 struct group *grp = NULL;
1932 #if !defined(_WIN32)
1940 * Parse the command line arguments
1942 while (++argc_pos < argc)
1945 /* Check to see if the service must be installed or uninstalled */
1946 if (strncmp(argv[argc_pos], "--install", 9) == 0)
1948 const char *pName = argv[argc_pos] + 9;
1951 exit( (install_service(pName)) ? 0 : 1 );
1953 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
1955 const char *pName = argv[argc_pos] + 11;
1958 exit((uninstall_service(pName)) ? 0 : 1);
1960 else if (strcmp(argv[argc_pos], "--service" ) == 0)
1962 bRunAsService = TRUE;
1963 w32_set_service_cwd();
1964 atexit(w32_service_exit_notify);
1967 #endif /* defined(_WIN32) */
1970 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1972 if (strcmp(argv[argc_pos], "--help") == 0)
1977 else if(strcmp(argv[argc_pos], "--version") == 0)
1979 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
1985 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
1990 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
1992 if (++argc_pos == argc) usage(argv[0]);
1993 pidfile = strdup(argv[argc_pos]);
1996 else if (strcmp(argv[argc_pos], "--user" ) == 0)
1998 if (++argc_pos == argc) usage(argv[argc_pos]);
2000 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
2003 if (NULL == (grp = getgrnam(p)))
2005 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
2009 if (NULL == (pw = getpwnam(argv[argc_pos])))
2011 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
2014 if (p != NULL) *--p = '\0';
2017 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
2022 #endif /* defined(unix) */
2023 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
2025 configfile = argv[argc_pos];
2028 } /* -END- while (more arguments) */
2031 if ( *configfile != '/' )
2033 char *abs_file, cwd[1024];
2035 /* make config-filename absolute here */
2036 if ( !(getcwd(cwd, sizeof(cwd))))
2038 perror("get working dir failed");
2042 if (!(basedir = strdup(cwd))
2043 || (!(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))))
2045 perror("malloc failed");
2048 strcpy( abs_file, basedir );
2049 strcat( abs_file, "/" );
2050 strcat( abs_file, configfile );
2051 configfile = abs_file;
2053 #endif /* defined unix */
2057 clients->next = NULL;
2061 #elif defined(_WIN32)
2065 #if defined(OSX_DARWIN) || defined(__OpenBSD__)
2067 * Prepare global mutex semaphores
2070 pthread_mutex_init(&gmtime_mutex,0);
2071 pthread_mutex_init(&localtime_mutex,0);
2072 #endif /* def OSX_DARWIN */
2073 pthread_mutex_init(&gethostbyaddr_mutex,0);
2074 pthread_mutex_init(&gethostbyname_mutex,0);
2075 #endif /* defined(OSX_DARWIN) || defined(__OpenBSD__) */
2077 #ifdef FEATURE_PTHREAD
2078 pthread_mutex_init(&log_mutex,0);
2079 pthread_mutex_init(&log_init_mutex,0);
2080 #endif /* FEATURE_PTHREAD */
2083 random_seed = (unsigned int)time(NULL);
2084 srandom(random_seed);
2085 #endif /* ifdef HAVE_RANDOM */
2088 * Unix signal handling
2090 * Catch the abort, interrupt and terminate signals for a graceful exit
2091 * Catch the hangup signal so the errlog can be reopened.
2092 * Ignore the broken pipe signals (FIXME: Why?)
2094 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
2097 const int catched_signals[] = { SIGABRT, SIGTERM, SIGINT, SIGHUP, 0 };
2098 const int ignored_signals[] = { SIGPIPE, 0 };
2100 for (idx = 0; catched_signals[idx] != 0; idx++)
2102 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
2104 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
2108 for (idx = 0; ignored_signals[idx] != 0; idx++)
2110 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
2112 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
2117 #else /* ifdef _WIN32 */
2118 # ifdef _WIN_CONSOLE
2120 * We *are* in a windows console app.
2121 * Print a verbose messages about FAQ's and such
2123 printf(win32_blurb);
2124 # endif /* def _WIN_CONSOLE */
2125 #endif /* def _WIN32 */
2128 /* Initialize the CGI subsystem */
2129 cgi_init_error_messages();
2132 * If runnig on unix and without the --nodaemon
2133 * option, become a daemon. I.e. fork, detach
2134 * from tty and get process group leadership
2147 if ( pid < 0 ) /* error */
2152 else if ( pid != 0 ) /* parent */
2157 * must check for errors
2158 * child died due to missing files aso
2161 wpid = waitpid( pid, &status, WNOHANG );
2170 /* Should be more portable, but not as well tested */
2175 #else /* ndef __FreeBSD__ */
2177 #endif /* ndef __FreeBSD__ */
2178 fd = open("/dev/tty", O_RDONLY);
2181 /* no error check here */
2182 ioctl( fd, TIOCNOTTY,0 );
2186 /* FIXME: should close stderr (fd 2) here too, but the test
2188 * and load config file is done in listen_loop() and puts
2189 * some messages on stderr there.
2196 } /* -END- if (!no_daemon) */
2199 * As soon as we have written the PID file, we can switch
2200 * to the user and group ID indicated by the --user option
2206 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
2208 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
2214 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
2216 if (chroot(pw->pw_dir) < 0)
2218 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
2222 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
2225 if (setuid(pw->pw_uid))
2227 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
2231 char putenv_dummy[64];
2233 strcpy(putenv_dummy, "HOME=/");
2234 if (putenv(putenv_dummy) != 0)
2236 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
2239 snprintf(putenv_dummy, 64, "USER=%s", pw->pw_name);
2240 if (putenv(putenv_dummy) != 0)
2242 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
2248 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
2251 #endif /* defined unix */
2254 /* This will be FALSE unless the command line specified --service
2258 /* Yup, so now we must attempt to establish a connection
2259 * with the service dispatcher. This will only work if this
2260 * process was launched by the service control manager to
2261 * actually run as a service. If this isn't the case, i've
2262 * known it take around 30 seconds or so for the call to return.
2265 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
2266 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
2268 /* Service has run, and at this point is now being stopped, so just return */
2273 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
2275 /* An error occurred. Usually it's because --service was wrongly specified
2276 * and we were unable to connect to the Service Control Dispatcher because
2277 * it wasn't expecting us and is therefore not listening.
2279 * For now, just continue below to call the listen_loop function.
2282 #endif /* def _WIN32 */
2292 /*********************************************************************
2294 * Function : bind_port_helper
2296 * Description : Bind the listen port. Handles logging, and aborts
2300 * 1 : config = Privoxy configuration. Specifies port
2303 * Returns : Port that was opened.
2305 *********************************************************************/
2306 static jb_socket bind_port_helper(struct configuration_spec * config)
2311 if ( (config->haddr != NULL)
2312 && (config->haddr[0] == '1')
2313 && (config->haddr[1] == '2')
2314 && (config->haddr[2] == '7')
2315 && (config->haddr[3] == '.') )
2317 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
2320 else if (config->haddr == NULL)
2322 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
2327 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
2328 config->hport, config->haddr);
2331 result = bind_port(config->haddr, config->hport, &bfd);
2338 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2339 "There may be another Privoxy or some other "
2340 "proxy running on port %d",
2341 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
2342 config->hport, config->hport);
2345 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2346 "The hostname is not resolvable",
2347 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2350 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
2351 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2354 /* shouldn't get here */
2355 return JB_INVALID_SOCKET;
2358 config->need_bind = 0;
2365 /* Without this simple workaround we get this compiler warning from _beginthread
2366 * warning C4028: formal parameter 1 different from declaration
2368 void w32_service_listen_loop(void *p)
2372 #endif /* def _WIN32 */
2375 /*********************************************************************
2377 * Function : listen_loop
2379 * Description : bind the listen port and enter a "FOREVER" listening loop.
2385 *********************************************************************/
2386 static void listen_loop(void)
2388 struct client_state *csp = NULL;
2390 struct configuration_spec * config;
2392 config = load_config();
2394 bfd = bind_port_helper(config);
2396 #ifdef FEATURE_GRACEFUL_TERMINATION
2397 while (!g_terminate)
2402 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
2403 while (waitpid(-1, NULL, WNOHANG) > 0)
2405 /* zombie children */
2407 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
2410 * Free data that was used by died threads
2416 * Re-open the errlog after HUP signal
2418 if (received_hup_signal)
2420 init_error_log(Argv[0], config->logfile, config->debug);
2421 received_hup_signal = 0;
2426 #ifdef FEATURE_COOKIE_JAR
2428 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
2429 * already open. I think unload_configfile() is not being run, which should do
2430 * this work. Until that can get resolved, we'll use this workaround.
2434 if (csp->config->jar)
2436 fclose(csp->config->jar);
2437 csp->config->jar = NULL;
2439 #endif /* FEATURE_COOKIE_JAR */
2440 #endif /* __OS2__ */
2442 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
2444 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
2448 csp->flags |= CSP_FLAG_ACTIVE;
2449 csp->sfd = JB_INVALID_SOCKET;
2451 csp->config = config = load_config();
2453 if ( config->need_bind )
2456 * Since we were listening to the "old port", we will not see
2457 * a "listen" param change until the next IJB request. So, at
2458 * least 1 more request must be made for us to find the new
2459 * setting. I am simply closing the old socket and binding the
2462 * Which-ever is correct, we will serve 1 more page via the
2463 * old settings. This should probably be a "show-proxy-args"
2464 * request. This should not be a so common of an operation
2465 * that this will hurt people's feelings.
2470 bfd = bind_port_helper(config);
2473 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
2475 if (!accept_connection(csp, bfd))
2477 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
2490 log_error(LOG_LEVEL_CONNECT, "OK");
2493 #ifdef FEATURE_TOGGLE
2494 if (global_toggle_state)
2496 csp->flags |= CSP_FLAG_TOGGLED_ON;
2498 #endif /* def FEATURE_TOGGLE */
2500 if (run_loader(csp))
2502 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
2503 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2507 if (block_acl(NULL,csp))
2509 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
2510 close_socket(csp->cfd);
2514 #endif /* def FEATURE_ACL */
2516 /* add it to the list of clients */
2517 csp->next = clients->next;
2518 clients->next = csp;
2520 if (config->multi_threaded)
2524 /* this is a switch () statment in the C preprocessor - ugh */
2525 #undef SELECTED_ONE_OPTION
2527 /* Use Pthreads in preference to native code */
2528 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
2529 #define SELECTED_ONE_OPTION
2531 pthread_t the_thread;
2532 pthread_attr_t attrs;
2534 pthread_attr_init(&attrs);
2535 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
2536 errno = pthread_create(&the_thread, &attrs,
2538 child_id = errno ? -1 : 0;
2539 pthread_attr_destroy(&attrs);
2543 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
2544 #define SELECTED_ONE_OPTION
2545 child_id = _beginthread(
2546 (void (*)(void *))serve,
2551 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
2552 #define SELECTED_ONE_OPTION
2553 child_id = _beginthread(
2554 (void(* _Optlink)(void*))serve,
2560 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
2561 #define SELECTED_ONE_OPTION
2563 thread_id tid = spawn_thread
2564 (server_thread, "server", B_NORMAL_PRIORITY, csp);
2566 if ((tid >= 0) && (resume_thread(tid) == B_OK))
2568 child_id = (int) tid;
2577 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2578 #define SELECTED_ONE_OPTION
2579 csp->cfd = ReleaseSocket(csp->cfd, -1);
2581 if((child_id = (int)CreateNewProcTags(
2582 NP_Entry, (ULONG)server_thread,
2583 NP_Output, Output(),
2584 NP_CloseOutput, FALSE,
2585 NP_Name, (ULONG)"privoxy child",
2586 NP_StackSize, 200*1024,
2590 ((struct Task *)child_id)->tc_UserData = csp;
2591 Signal((struct Task *)child_id, SIGF_SINGLE);
2596 #if !defined(SELECTED_ONE_OPTION)
2599 /* This block is only needed when using fork().
2600 * When using threads, the server thread was
2601 * created and run by the call to _beginthread().
2603 if (child_id == 0) /* child */
2606 #ifdef FEATURE_TOGGLE
2607 int inherited_toggle_state = global_toggle_state;
2608 #endif /* def FEATURE_TOGGLE */
2613 * If we've been toggled or we've blocked the request, tell Mom
2616 #ifdef FEATURE_TOGGLE
2617 if (inherited_toggle_state != global_toggle_state)
2619 rc |= RC_FLAG_TOGGLED;
2621 #endif /* def FEATURE_TOGGLE */
2623 #ifdef FEATURE_STATISTICS
2624 if (csp->flags & CSP_FLAG_REJECTED)
2626 rc |= RC_FLAG_BLOCKED;
2628 #endif /* ndef FEATURE_STATISTICS */
2632 else if (child_id > 0) /* parent */
2634 /* in a fork()'d environment, the parent's
2635 * copy of the client socket and the CSP
2639 #if !defined(_WIN32) && !defined(__CYGWIN__)
2641 wait( &child_status );
2644 * Evaluate child's return code: If the child has
2645 * - been toggled, toggle ourselves
2646 * - blocked its request, bump up the stats counter
2649 #ifdef FEATURE_TOGGLE
2650 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
2652 global_toggle_state = !global_toggle_state;
2654 #endif /* def FEATURE_TOGGLE */
2656 #ifdef FEATURE_STATISTICS
2658 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
2662 #endif /* def FEATURE_STATISTICS */
2664 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
2665 close_socket(csp->cfd);
2666 csp->flags &= ~CSP_FLAG_ACTIVE;
2670 #undef SELECTED_ONE_OPTION
2671 /* end of cpp switch () */
2673 if (child_id < 0) /* failed */
2675 char buf[BUFFER_SIZE];
2677 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
2679 sprintf(buf , "Privoxy: can't fork: errno = %d", errno);
2681 write_socket(csp->cfd, buf, strlen(buf));
2682 close_socket(csp->cfd);
2683 csp->flags &= ~CSP_FLAG_ACTIVE;
2694 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
2696 /* Clean up. Aim: free all memory (no leaks) */
2697 #ifdef FEATURE_GRACEFUL_TERMINATION
2699 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
2701 unload_current_config_file();
2702 unload_current_actions_file();
2703 unload_current_re_filterfile();
2704 #ifdef FEATURE_TRUST
2705 unload_current_trust_file();
2708 if (config->multi_threaded)
2715 } while ((clients->next != NULL) && (--i > 0));
2719 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
2730 #ifdef FEATURE_COOKIE_JAR
2731 if (NULL != config->jar)
2733 fclose(config->jar);
2737 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
2738 /* Cleanup - remove taskbar icon etc. */
2743 #endif /* FEATURE_GRACEFUL_TERMINATION */