1 const char jcc_rcs[] = "$Id: jcc.c,v 1.106 2006/11/06 19:58:23 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 1.106 2006/11/06 19:58:23 fabiankeil
37 * Move pthread.h inclusion from jcc.c to jcc.h.
38 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
40 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
41 * Don't exit after receiving the second SIGHUP on Solaris.
43 * Fixes BR 1052235, but the same problem may exist on other
44 * systems. Once 3.0.6 is out we should use sigset()
45 * where available and see if it breaks anything.
47 * Revision 1.104 2006/09/23 13:26:38 roro
48 * Replace TABs by spaces in source code.
50 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
51 * Fix +redirect{}. Didn't work with -fast-redirects.
53 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
54 * Respond with 400 and a short text message
55 * if the client tries to use Privoxy as FTP proxy.
57 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
58 * Make number of retries in case of forwarded-connect problems
59 * a config file option (forwarded-connect-retries) and use 0 as
62 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
65 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
66 * Follow the OpenBSD port's lead and protect the resolve
67 * functions on OpenBSD as well.
69 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
70 * --user fix. Only use the user as group if no group is specified.
71 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
73 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
74 * Windows service (re-)integration
78 * --install[:service_name]
79 * --uninstall[:service_name]
82 * They work as follows:
83 * --install will create a service for you and then terminate.
84 * By default the service name will be "privoxy" (without the quotes).
85 * However you can run multiple services if you wish, just by adding
86 * a colon and then a name (no spaces).
88 * --uninstall follows the exact same rules a --install.
90 * --service is used when the program is executed by the service
91 * control manager, and in normal circumstances would never be
92 * used as a command line argument.
94 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
95 * Windows service integration
97 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
98 * Incorporate Fabian Keil's patch work:
\rhttp://www.fabiankeil.de/sourcecode/privoxy/
100 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
101 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
102 * with what was really the latest development (the v_3_0_branch branch)
104 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
105 * Thanks to Jindrich Makovicka for a race condition fix for the log
106 * file. The race condition remains for non-pthread implementations.
107 * Reference patch #1175720.
109 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
110 * Add the ability to check jpeg images for invalid
111 * lengths of comment blocks. Defensive strategy
112 * against the exploit:
113 * Microsoft Security Bulletin MS04-028
114 * Buffer Overrun in JPEG Processing (GDI+) Could
115 * Allow Code Execution (833987)
116 * Enabled with +inspect-jpegs in actions files.
118 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
119 * - Fixed usage info for non-unix platforms
120 * - Fixed small cmdline parsing bug
122 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
123 * Diagnostics: Now preserve the returncode of pthread_create
124 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
126 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
127 * No longer ignore SIGCHLD. Fixes bug #769381
129 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
130 * Close jarfile on graceful exit, remove stray line
132 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
133 * Cosmetics: Killed a warning, a typo and an allocation left at exit
135 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
136 * No longer rely on non-POSIX.1 extensions of getcwd().
139 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
140 * Replaced setenv() by posix-compliant putenv()
141 * Thanks to Neil McCalden (nmcc AT users.sf.net).
143 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
144 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
146 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
147 * Clean-up and extension of improvements for forked mode:
148 * - Child's return code now consists of flags RC_FLAG_*
149 * - Reporting toggle to parent now properly #ifdef'ed
150 * - Children now report blocking to parent. This enables
151 * statistics in forked mode
153 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
154 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
155 * Children now report having been toggled through _exit(17), parents
156 * watch for that code and toggle themselves if found.
158 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
159 * Wrapping all *_r functions (the non-_r versions of them) with
160 * mutex semaphores for OSX. Hopefully this will take care of all
161 * of those pesky crash reports.
163 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
164 * Fixed two mostly harmless mem leaks
166 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
167 * Fix: Head of global clients list now initialized to NULL
169 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
170 * Added basic support for OPTIONS and TRACE HTTP methods:
171 * - New interceptor direct_response() added in chat().
172 * - sed() moved to earlier in the process, so that the
173 * Host: header is evaluated before actions and forwarding
176 * Revision 1.92 2002/05/08 16:00:46 oes
177 * Chat's buffer handling:
178 * - Fixed bug with unchecked out-of-mem conditions
179 * while reading client request & server headers
180 * - No longer predict if the buffer limit will be exceeded
181 * in the next read -- check add_to_iob's new
182 * return code. If buffer couldn't be extended
183 * (policy or out-of-mem) while
184 * - reading from client: abort
185 * - reading server headers: send error page
186 * - buffering server body for filter: flush,
187 * and if that fails: send error page
189 * Revision 1.91 2002/04/08 20:35:58 swa
192 * Revision 1.90 2002/04/02 14:57:28 oes
193 * Made sending wafers independent of FEATURE_COOKIE_JAR
195 * Revision 1.89 2002/03/31 17:18:59 jongfoster
196 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
198 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
199 * More compiler warning message maintenance
201 * Revision 1.87 2002/03/26 22:29:54 swa
202 * we have a new homepage!
204 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
205 * Workaround for closing the jarfile before load_config() comes around again
207 * Revision 1.85 2002/03/24 15:23:33 jongfoster
210 * Revision 1.84 2002/03/24 13:25:43 swa
211 * name change related issues
213 * Revision 1.83 2002/03/16 23:54:06 jongfoster
214 * Adding graceful termination feature, to help look for memory leaks.
215 * If you enable this (which, by design, has to be done by hand
216 * editing config.h) and then go to http://i.j.b/die, then the program
217 * will exit cleanly after the *next* request. It should free all the
218 * memory that was used.
220 * Revision 1.82 2002/03/13 00:27:05 jongfoster
223 * Revision 1.81 2002/03/12 01:42:50 oes
224 * Introduced modular filters
226 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
227 * OS/2 port maintenance:
228 * - Fixed EMX build - it had decayed a little
229 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
230 * substituted a memset for now.
232 * Revision 1.79 2002/03/09 20:03:52 jongfoster
233 * - Making various functions return int rather than size_t.
234 * (Undoing a recent change). Since size_t is unsigned on
235 * Windows, functions like read_socket that return -1 on
236 * error cannot return a size_t.
238 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
239 * crashes, and also frequently caused JB to jump to 100%
240 * CPU and stay there. (Because it thought it had just
241 * read ((unsigned)-1) == 4Gb of data...)
243 * - The signature of write_socket has changed, it now simply
244 * returns success=0/failure=nonzero.
246 * - Trying to get rid of a few warnings --with-debug on
247 * Windows, I've introduced a new type "jb_socket". This is
248 * used for the socket file descriptors. On Windows, this
249 * is SOCKET (a typedef for unsigned). Everywhere else, it's
250 * an int. The error value can't be -1 any more, so it's
251 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
252 * Windows it maps to the #define INVALID_SOCKET.)
254 * - The signature of bind_port has changed.
256 * Revision 1.78 2002/03/08 21:35:04 oes
257 * Added optional group supplement to --user option. Will now use default group of user if no group given
259 * Revision 1.77 2002/03/07 03:52:06 oes
260 * - Fixed compiler warnings etc
261 * - Improved handling of failed DNS lookups
263 * Revision 1.76 2002/03/06 22:54:35 jongfoster
264 * Automated function-comment nitpicking.
266 * Revision 1.75 2002/03/06 10:02:19 oes
267 * Fixed stupid bug when --user was not given
269 * Revision 1.74 2002/03/06 00:49:31 jongfoster
270 * Fixing warning on Windows
271 * Making #ifdefs that refer to the same variable consistently
272 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
274 * Revision 1.73 2002/03/05 23:57:30 hal9
275 * Stray character 's' on line 1618 was breaking build.
277 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
278 * - Re-enable OS/2 building after new parms were added
279 * - Fix false out of memory report when resolving CGI templates when no IP
280 * address is available of failed attempt (a la no such domain)
282 * Revision 1.71 2002/03/05 18:13:56 oes
283 * Added --user option
285 * Revision 1.70 2002/03/05 04:52:42 oes
286 * Deleted non-errlog debugging code
288 * Revision 1.69 2002/03/04 23:50:00 jongfoster
289 * Splitting off bind_port() call into bind_port_helper(), with
292 * Revision 1.68 2002/03/04 20:17:32 oes
295 * Revision 1.67 2002/03/04 18:18:57 oes
296 * - Removed _DEBUG mode
297 * - Cleand up cmdline parsing
298 * - Introduced --no-daemon, --pidfile options
299 * - Cleaned up signal handling:
300 * - Terminate cleanly on INT, TERM and ABRT
301 * - Schedule logfile for re-opening on HUP
302 * - Ignore CHLD and PIPE
303 * - Leave the rest with their default handlers
304 * - Uniform handler registration
305 * - Added usage() function
306 * - Played styleguide police
308 * Revision 1.66 2002/03/03 15:06:55 oes
309 * Re-enabled automatic config reloading
311 * Revision 1.65 2002/03/03 14:49:11 oes
312 * Fixed CLF logging: Now uses client's original HTTP request
314 * Revision 1.64 2002/03/03 09:18:03 joergs
315 * Made jumbjuster work on AmigaOS again.
317 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
318 * Clean up a little CRLF unpleasantness that suddenly appeared
320 * Revision 1.62 2002/02/20 23:17:23 jongfoster
321 * Detecting some out-of memory conditions and exiting with a log message.
323 * Revision 1.61 2002/01/17 21:01:52 jongfoster
324 * Moving all our URL and URL pattern parsing code to urlmatch.c.
326 * Revision 1.60 2001/12/30 14:07:32 steudten
327 * - Add signal handling (unix)
328 * - Add SIGHUP handler (unix)
329 * - Add creation of pidfile (unix)
330 * - Add action 'top' in rc file (RH)
331 * - Add entry 'SIGNALS' to manpage
332 * - Add exit message to logfile (unix)
334 * Revision 1.59 2001/12/13 14:07:18 oes
335 * Fixed Bug: 503 error page now sent OK
337 * Revision 1.58 2001/11/30 23:37:24 jongfoster
338 * Renaming the Win32 config file to config.txt - this is almost the
339 * same as the corresponding UNIX name "config"
341 * Revision 1.57 2001/11/16 00:47:43 jongfoster
342 * Changing the tty-disconnection code to use setsid().
344 * Revision 1.56 2001/11/13 20:20:54 jongfoster
345 * Tabs->spaces, fixing a bug with missing {} around an if()
347 * Revision 1.55 2001/11/13 20:14:53 jongfoster
348 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
350 * Revision 1.54 2001/11/07 00:03:14 steudten
351 * Give reliable return value if an error
352 * occurs not just 0 with new daemon mode.
354 * Revision 1.53 2001/11/05 21:41:43 steudten
355 * Add changes to be a real daemon just for unix os.
356 * (change cwd to /, detach from controlling tty, set
357 * process group and session leader to the own process.
359 * Add some fatal-error log message for failed malloc().
360 * Add '-d' if compiled with 'configure --with-debug' to
361 * enable debug output.
363 * Revision 1.52 2001/10/26 20:11:20 jongfoster
364 * Fixing type mismatch
366 * Revision 1.51 2001/10/26 17:38:28 oes
369 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
370 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
371 * threads to call select() simultaneously. So, it's time to do a real, live,
372 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
373 * (native). Both versions will work, but using __OS2__ offers multi-threading.
375 * Revision 1.49 2001/10/23 21:41:35 jongfoster
376 * Added call to initialize the (statically-allocated of course)
377 * "out of memory" CGI response.
379 * Revision 1.48 2001/10/10 19:56:46 jongfoster
380 * Moving some code that wasn't cookie-related out of an #ifdef
383 * Revision 1.47 2001/10/10 16:44:36 oes
384 * Added CONNECT destination port limitation check
386 * Revision 1.46 2001/10/08 15:17:41 oes
387 * Re-enabled SSL forwarding
389 * Revision 1.45 2001/10/07 15:42:11 oes
390 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
392 * Moved downgrading of the HTTP version from parse_http_request to
393 * chat(), since we can't decide if it is necessary before we have
394 * determined the actions for the URL. The HTTP command is now
395 * *always* re-built so the repairs need no longer be special-cased.
397 * filter_popups now gets a csp pointer so it can raise the new
398 * CSP_FLAG_MODIFIED flag.
402 * Added configurable size limit for the IOB. If the IOB grows so
403 * large that the next read would exceed the limit, the header
404 * is generated, and the header & unfiltered buffer are flushed
405 * to the client. Chat then continues in non-buffering,
406 * non-filtering body mode.
408 * Revision 1.44 2001/10/02 18:13:57 oes
411 * Revision 1.43 2001/10/02 15:32:13 oes
412 * Moved generation of hdr
414 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
415 * Cleaning up 2 compiler warnings on OS/2.
417 * Revision 1.41 2001/09/16 17:05:14 jongfoster
418 * Removing unused #include showarg.h
420 * Revision 1.40 2001/09/16 15:41:45 jongfoster
421 * Fixing signed/unsigned comparison warning.
423 * Revision 1.39 2001/09/16 13:21:27 jongfoster
424 * Changes to use new list functions.
426 * Revision 1.38 2001/09/16 13:01:46 jongfoster
427 * Removing redundant function call that zeroed zalloc()'d memory.
429 * Revision 1.37 2001/09/10 11:12:24 oes
430 * Deleted unused variable
432 * Revision 1.36 2001/09/10 10:56:15 oes
433 * Silenced compiler warnings
435 * Revision 1.35 2001/07/31 14:44:22 oes
436 * Deleted unused size parameter from filter_popups()
438 * Revision 1.34 2001/07/30 22:08:36 jongfoster
439 * Tidying up #defines:
440 * - All feature #defines are now of the form FEATURE_xxx
441 * - Permanently turned off WIN_GUI_EDIT
442 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
444 * Revision 1.33 2001/07/29 19:32:00 jongfoster
445 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
447 * Revision 1.32 2001/07/29 18:47:05 jongfoster
448 * Adding missing #include "loadcfg.h"
450 * Revision 1.31 2001/07/29 12:17:48 oes
451 * Applied pthread fix by Paul Lieverse
453 * Revision 1.30 2001/07/25 22:57:13 jongfoster
454 * __BEOS__ no longer overrides FEATURE_PTHREAD.
455 * This is because FEATURE_PTHREAD will soon be widely used, so I
456 * want to keep it simple.
458 * Revision 1.29 2001/07/24 12:47:06 oes
459 * Applied BeOS support update by Eugenia
461 * Revision 1.28 2001/07/23 13:26:12 oes
462 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
464 * Revision 1.27 2001/07/19 19:09:47 haroon
465 * - Added code to take care of the situation where while processing the first
466 * server response (which includes the server header), after finding the end
467 * of the headers we were not looking past the end of the headers for
468 * content modification. I enabled it for filter_popups.
469 * Someone else should look to see if other similar operations should be
470 * done to the discarded portion of the buffer.
472 * Note 2001/07/20: No, the other content modification mechanisms will process
473 * the whole iob later anyway. --oes
475 * Revision 1.26 2001/07/18 12:31:36 oes
478 * Revision 1.25 2001/07/15 19:43:49 jongfoster
479 * Supports POSIX threads.
480 * Also removed some unused #includes.
482 * Revision 1.24 2001/07/13 14:00:40 oes
483 * - Generic content modification scheme:
484 * Each feature has its own applicability flag that is set
485 * from csp->action->flags.
486 * Replaced the "filtering" int flag , by a function pointer
487 * "content_filter" to the function that will do the content
488 * modification. If it is != NULL, the document will be buffered
489 * and processed through *content_filter, which must set
490 * csp->content_length and return a modified copy of the body
491 * or return NULL (on failiure).
492 * - Changed csp->is_text to the more generic bitmap csp->content_type
493 * which can currently take the valued CT_TEXT or CT_GIF
495 * - Removed all #ifdef PCRS
497 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
498 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
499 * the `block_acl' call. This prevents a compilation error when the user
500 * does not wish to use the "ACL" feature.
502 * Revision 1.22 2001/06/29 21:45:41 oes
503 * Indentation, CRLF->LF, Tab-> Space
505 * Revision 1.21 2001/06/29 13:29:36 oes
506 * - Cleaned up, improved comments
507 * - Unified all possible interceptors (CGI,
508 * block, trust, fast_redirect) in one
509 * place, with one (CGI) answer generation
510 * mechansim. Much clearer now.
511 * - Removed the GIF image generation, which
512 * is now done in filters.c:block_url()
513 * - Made error conditions like domain lookup
514 * failiure or (various) problems while talking
515 * to the server use cgi.c:error_response()
516 * instead of generating HTML/HTTP in chat() (yuck!)
517 * - Removed logentry from cancelled commit
519 * Revision 1.20 2001/06/09 10:55:28 jongfoster
520 * Changing BUFSIZ ==> BUFFER_SIZE
522 * Revision 1.19 2001/06/07 23:12:52 jongfoster
523 * Replacing function pointer in struct gateway with a directly
524 * called function forwarded_connect().
525 * Replacing struct gateway with struct forward_spec
527 * Revision 1.18 2001/06/03 19:12:16 oes
528 * introduced new cgi handling
530 * Revision 1.17 2001/06/01 20:07:23 jongfoster
531 * Now uses action +image-blocker{} rather than config->tinygif
533 * Revision 1.16 2001/06/01 18:49:17 jongfoster
534 * Replaced "list_share" with "list" - the tiny memory gain was not
535 * worth the extra complexity.
537 * Revision 1.15 2001/05/31 21:24:47 jongfoster
538 * Changed "permission" to "action" throughout.
539 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
540 * Moved vanilla wafer check into chat(), since we must now
541 * decide whether or not to add it based on the URL.
543 * Revision 1.14 2001/05/29 20:14:01 joergs
544 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
547 * Revision 1.13 2001/05/29 09:50:24 jongfoster
548 * Unified blocklist/imagelist/permissionslist.
549 * File format is still under discussion, but the internal changes
552 * Also modified interceptor behaviour:
553 * - We now intercept all URLs beginning with one of the following
554 * prefixes (and *only* these prefixes):
556 * * http://ijbswa.sf.net/config/
557 * * http://ijbswa.sourceforge.net/config/
558 * - New interceptors "home page" - go to http://i.j.b/ to see it.
559 * - Internal changes so that intercepted and fast redirect pages
560 * are not replaced with an image.
561 * - Interceptors now have the option to send a binary page direct
562 * to the client. (i.e. ijb-send-banner uses this)
563 * - Implemented show-url-info interceptor. (Which is why I needed
564 * the above interceptors changes - a typical URL is
565 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
566 * The previous mechanism would not have intercepted that, and
567 * if it had been intercepted then it then it would have replaced
570 * Revision 1.12 2001/05/27 22:17:04 oes
572 * - re_process_buffer no longer writes the modified buffer
573 * to the client, which was very ugly. It now returns the
574 * buffer, which it is then written by chat.
576 * - content_length now adjusts the Content-Length: header
577 * for modified documents rather than crunch()ing it.
578 * (Length info in csp->content_length, which is 0 for
579 * unmodified documents)
581 * - For this to work, sed() is called twice when filtering.
583 * Revision 1.11 2001/05/26 17:27:53 jongfoster
584 * Added support for CLF and fixed LOG_LEVEL_LOG.
585 * Also did CRLF->LF fix of my previous patch.
587 * Revision 1.10 2001/05/26 15:26:15 jongfoster
588 * ACL feature now provides more security by immediately dropping
589 * connections from untrusted hosts.
591 * Revision 1.9 2001/05/26 00:28:36 jongfoster
592 * Automatic reloading of config file.
593 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
594 * Most of the global variables have been moved to a new
595 * struct configuration_spec, accessed through csp->config->globalname
596 * Most of the globals remaining are used by the Win32 GUI.
598 * Revision 1.8 2001/05/25 22:43:18 jongfoster
599 * Fixing minor memory leak and buffer overflow.
601 * Revision 1.7 2001/05/25 22:34:30 jongfoster
604 * Revision 1.6 2001/05/23 00:13:58 joergs
605 * AmigaOS support fixed.
607 * Revision 1.5 2001/05/22 18:46:04 oes
609 * - Enabled filtering banners by size rather than URL
610 * by adding patterns that replace all standard banner
611 * sizes with the "Junkbuster" gif to the re_filterfile
613 * - Enabled filtering WebBugs by providing a pattern
614 * which kills all 1x1 images
616 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
617 * which is selected by the (nonstandard and therefore
618 * capital) letter 'U' in the option string.
619 * It causes the quantifiers to be ungreedy by default.
620 * Appending a ? turns back to greedy (!).
622 * - Added a new interceptor ijb-send-banner, which
623 * sends back the "Junkbuster" gif. Without imagelist or
624 * MSIE detection support, or if tinygif = 1, or the
625 * URL isn't recognized as an imageurl, a lame HTML
626 * explanation is sent instead.
628 * - Added new feature, which permits blocking remote
629 * script redirects and firing back a local redirect
631 * The feature is conditionally compiled, i.e. it
632 * can be disabled with --disable-fast-redirects,
633 * plus it must be activated by a "fast-redirects"
634 * line in the config file, has its own log level
635 * and of course wants to be displayed by show-proxy-args
636 * Note: Boy, all the #ifdefs in 1001 locations and
637 * all the fumbling with configure.in and acconfig.h
638 * were *way* more work than the feature itself :-(
640 * - Because a generic redirect template was needed for
641 * this, tinygif = 3 now uses the same.
643 * - Moved GIFs, and other static HTTP response templates
648 * - Removed some >400 CRs again (Jon, you really worked
651 * Revision 1.4 2001/05/21 19:34:01 jongfoster
652 * Made failure to bind() a fatal error.
654 * Revision 1.3 2001/05/20 01:21:20 jongfoster
655 * Version 2.9.4 checkin.
656 * - Merged popupfile and cookiefile, and added control over PCRS
657 * filtering, in new "permissionsfile".
658 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
659 * file error you now get a message box (in the Win32 GUI) rather
660 * than the program exiting with no explanation.
661 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
663 * - Removed tabs from "config"
664 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
665 * - Bumped up version number.
667 * Revision 1.2 2001/05/17 22:34:44 oes
668 * - Added hint on GIF char array generation to jcc.c
669 * - Cleaned CRLF's from the sources and related files
670 * - Repaired logging for REF and FRC
672 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
673 * Initial import of version 2.9.3 source tree
676 *********************************************************************/
682 #include <sys/types.h>
690 # ifndef FEATURE_PTHREAD
694 # include <windows.h>
695 # include <process.h>
696 # endif /* ndef FEATURE_PTHREAD */
699 # ifndef _WIN_CONSOLE
701 # endif /* ndef _WIN_CONSOLE */
702 # include "w32svrapi.h"
704 #else /* ifndef _WIN32 */
706 # if !defined (__OS2__)
708 # include <sys/wait.h>
709 # endif /* ndef __OS2__ */
710 # include <sys/time.h>
711 # include <sys/stat.h>
712 # include <sys/ioctl.h>
715 #include <sys/termios.h>
726 # include <socket.h> /* BeOS has select() for sockets only. */
727 # include <OS.h> /* declarations for threads and stuff. */
730 # if defined(__EMX__) || defined(__OS2__)
731 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
736 #define bzero(B,N) memset(B,0x00,n)
751 #include "killpopup.h"
752 #include "miscutil.h"
754 #include "jbsockets.h"
759 #include "urlmatch.h"
761 const char jcc_h_rcs[] = JCC_H_VERSION;
762 const char project_h_rcs[] = PROJECT_H_VERSION;
765 struct client_state clients[1];
766 struct file_list files[1];
768 #ifdef FEATURE_STATISTICS
769 int urls_read = 0; /* total nr of urls read inc rejected */
770 int urls_rejected = 0; /* total nr of urls rejected */
771 #endif /* def FEATURE_STATISTICS */
773 #ifdef FEATURE_GRACEFUL_TERMINATION
777 static void listen_loop(void);
778 static void chat(struct client_state *csp);
780 void serve(struct client_state *csp);
781 #else /* ifndef AMIGA */
782 static void serve(struct client_state *csp);
783 #endif /* def AMIGA */
786 static int32 server_thread(void *data);
787 #endif /* def __BEOS__ */
790 #define sleep(N) Sleep(((N) * 1000))
794 #define sleep(N) DosSleep(((N) * 100))
797 #ifdef FEATURE_PTHREAD
798 pthread_mutex_t log_mutex;
799 pthread_mutex_t log_init_mutex;
801 #ifndef HAVE_GMTIME_R
802 pthread_mutex_t gmtime_mutex;
803 #endif /* ndef HAVE_GMTIME_R */
805 #ifndef HAVE_LOCALTIME_R
806 pthread_mutex_t localtime_mutex;
807 #endif /* ndef HAVE_GMTIME_R */
809 #ifndef HAVE_GETHOSTBYADDR_R
810 pthread_mutex_t gethostbyaddr_mutex;
811 #endif /* ndef HAVE_GETHOSTBYADDR_R */
813 #ifndef HAVE_GETHOSTBYNAME_R
814 pthread_mutex_t gethostbyname_mutex;
815 #endif /* ndef HAVE_GETHOSTBYNAME_R */
816 #endif /* FEATURE_PTHREAD */
818 #if defined(unix) || defined(__EMX__)
819 const char *basedir = NULL;
820 const char *pidfile = NULL;
821 int received_hup_signal = 0;
822 #endif /* defined unix */
824 /* The vanilla wafer. */
825 static const char VANILLA_WAFER[] =
826 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
827 "Do_not_send_me_any_copyrighted_information_other_than_the_"
828 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
829 "In_particular_do_not_send_me_any_cookies_that_"
830 "are_subject_to_a_claim_of_copyright_by_anybody._"
831 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
832 "(copyright_or_otherwise)_applying_to_any_cookie._";
835 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
836 /*********************************************************************
838 * Function : sig_handler
840 * Description : Signal handler for different signals.
841 * Exit gracefully on ABRT, TERM and INT
842 * or set a flag that will cause the errlog
843 * to be reopened by the main thread on HUP.
846 * 1 : the_signal = the signal cause this function to call
850 *********************************************************************/
851 static void sig_handler(int the_signal)
858 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
866 received_hup_signal = 1;
871 * We shouldn't be here, unless we catch signals
872 * in main() that we can't handle here!
874 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
882 /*********************************************************************
886 * Description : Once a connection to the client has been accepted,
887 * this function is called (via serve()) to handle the
888 * main business of the communication. When this
889 * function returns, the caller must close the client
893 * 1 : csp = Current client state (buffers, headers, etc...)
895 * Returns : On success, the number of bytes written are returned (zero
896 * indicates nothing was written). On error, -1 is returned,
897 * and errno is set appropriately. If count is zero and the
898 * file descriptor refers to a regular file, 0 will be
899 * returned without causing any other effect. For a special
900 * file, the results are not portable.
902 *********************************************************************/
903 static void chat(struct client_state *csp)
906 * This next lines are a little ugly, but they simplifies the if statements
907 * below. Basically if TOGGLE, then we want the if to test if the
908 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
909 * then we want the if to test for CSP_FLAG_FORCED , else we don't
911 #ifdef FEATURE_TOGGLE
912 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
913 #else /* ifndef FEATURE_TOGGLE */
914 # define IS_TOGGLED_ON_AND
915 #endif /* ndef FEATURE_TOGGLE */
916 #ifdef FEATURE_FORCE_LOAD
917 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
918 #else /* ifndef FEATURE_FORCE_LOAD */
919 # define IS_NOT_FORCED_AND
920 #endif /* def FEATURE_FORCE_LOAD */
922 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
924 char buf[BUFFER_SIZE];
932 int ms_iis5_hack = 0;
934 unsigned int forwarded_connect_retries = 0;
935 unsigned int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
936 const struct forward_spec * fwd;
937 struct http_request *http;
938 int len; /* for buffer sizes */
939 #ifdef FEATURE_KILL_POPUPS
940 int block_popups; /* bool, 1==will block popups */
941 int block_popups_now = 0; /* bool, 1==currently blocking popups */
942 #endif /* def FEATURE_KILL_POPUPS */
944 int pcrs_filter; /* bool, 1==will filter through pcrs */
945 int gif_deanimate; /* bool, 1==will deanimate gifs */
946 int jpeg_inspect; /* bool, 1==will inspect jpegs */
948 /* Function that does the content filtering for the current request */
949 char *(*content_filter)() = NULL;
951 /* Skeleton for HTTP response, if we should intercept the request */
952 struct http_response *rsp;
957 * Read the client's request. Note that since we're not using select() we
958 * could get blocked here if a client connected, then didn't say anything!
963 len = read_socket(csp->cfd, buf, sizeof(buf));
965 if (len <= 0) break; /* error! */
968 * If there is no memory left for buffering the
969 * request, there is nothing we can do but hang up
971 if (add_to_iob(csp, buf, len))
976 req = get_header(csp);
980 break; /* no HTTP request! */
985 continue; /* more to come! */
988 #ifdef FEATURE_FORCE_LOAD
989 /* If this request contains the FORCE_PREFIX,
990 * better get rid of it now and set the force flag --oes
993 if (strstr(req, FORCE_PREFIX))
995 strclean(req, FORCE_PREFIX);
996 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
997 csp->flags |= CSP_FLAG_FORCED;
1000 #endif /* def FEATURE_FORCE_LOAD */
1002 parse_http_request(req, http, csp);
1007 if (http->cmd == NULL)
1009 strcpy(buf, CHEADER);
1010 write_socket(csp->cfd, buf, strlen(buf));
1012 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
1014 free_http_request(http);
1018 if (!strncmpic(http->cmd, "GET ftp://", 10))
1020 strcpy(buf, FTP_RESPONSE);
1021 write_socket(csp->cfd, buf, strlen(buf));
1023 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as FTP proxy: %s",
1024 csp->ip_addr_str, http->cmd);
1026 free_http_request(http);
1030 /* decide how to route the HTTP request */
1032 if ((fwd = forward_url(http, csp)) == NULL)
1034 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1035 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1038 /* build the http request to send to the server
1039 * we have to do one of the following:
1041 * create = use the original HTTP request to create a new
1042 * HTTP request that has either the path component
1043 * without the http://domainspec (w/path) or the
1044 * full orininal URL (w/url)
1045 * Note that the path and/or the HTTP version may
1046 * have been altered by now.
1048 * connect = Open a socket to the host:port of the server
1049 * and short-circuit server and client socket.
1051 * pass = Pass the request unchanged if forwarding a CONNECT
1052 * request to a parent proxy. Note that we'll be sending
1053 * the CFAIL message ourselves if connecting to the parent
1054 * fails, but we won't send a CSUCCEED message if it works,
1055 * since that would result in a double message (ours and the
1056 * parent's). After sending the request to the parent, we simply
1059 * here's the matrix:
1062 * +--------+--------+
1064 * 0 | create | connect|
1066 * Forwarding +--------+--------+
1068 * 1 | create | pass |
1070 * +--------+--------+
1075 * Determine the actions for this URL
1077 #ifdef FEATURE_TOGGLE
1078 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1080 /* Most compatible set of actions (i.e. none) */
1081 init_current_action(csp->action);
1084 #endif /* ndef FEATURE_TOGGLE */
1086 url_actions(http, csp);
1091 * Check if a CONNECT request is allowable:
1092 * In the absence of a +limit-connect action, allow only port 443.
1093 * If there is an action, allow whatever matches the specificaton.
1097 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
1098 || (csp->action->flags & ACTION_LIMIT_CONNECT
1099 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
1101 if (csp->action->flags & ACTION_TREAT_FORBIDDEN_CONNECTS_LIKE_BLOCKS)
1103 /* The response will violate the specs, but makes unblocking easier. */
1104 log_error(LOG_LEVEL_ERROR, "Marking suspicious CONNECT request from %s for blocking.",
1106 csp->action->flags |= ACTION_BLOCK;
1111 strcpy(buf, CFORBIDDEN);
1112 write_socket(csp->cfd, buf, strlen(buf));
1113 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
1114 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
1122 * Downgrade http version from 1.1 to 1.0 if +downgrade
1125 if ( (http->ssl == 0)
1126 && (!strcmpic(http->ver, "HTTP/1.1"))
1127 && (csp->action->flags & ACTION_DOWNGRADE))
1130 http->ver = strdup("HTTP/1.0");
1132 if (http->ver == NULL)
1134 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1139 * Save a copy of the original request for logging
1141 http->ocmd = strdup(http->cmd);
1143 if (http->ocmd == NULL)
1145 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
1149 * (Re)build the HTTP request for non-SSL requests.
1150 * If forwarding, use the whole URL, else, use only the path.
1156 http->cmd = strdup(http->gpc);
1157 string_append(&http->cmd, " ");
1159 if (fwd->forward_host)
1161 string_append(&http->cmd, http->url);
1165 string_append(&http->cmd, http->path);
1167 string_append(&http->cmd, " ");
1168 string_append(&http->cmd, http->ver);
1170 if (http->cmd == NULL)
1172 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1174 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", http->cmd);
1176 enlist(csp->headers, http->cmd);
1180 * If the user has not supplied any wafers, and the user has not
1181 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1183 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1184 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1186 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1190 #ifdef FEATURE_KILL_POPUPS
1191 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
1192 #endif /* def FEATURE_KILL_POPUPS */
1194 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
1195 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
1197 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
1199 jpeg_inspect = ((csp->action->flags & ACTION_JPEG_INSPECT) != 0);
1201 /* grab the rest of the client's headers */
1205 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1207 len = read_socket(csp->cfd, buf, sizeof(buf));
1210 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1215 * If there is no memory left for buffering the
1216 * request, there is nothing we can do but hang up
1218 if (add_to_iob(csp, buf, len))
1225 if (p == NULL) break;
1227 enlist(csp->headers, p);
1232 * We have a request. Now, check to see if we need to
1233 * intercept it, i.e. If ..
1237 /* We may not forward the request by rfc2616 sect 14.31 */
1238 (NULL != (rsp = direct_response(csp)))
1240 /* or a CGI call was detected and answered */
1241 || (NULL != (rsp = dispatch_cgi(csp)))
1243 /* or we are enabled and... */
1244 || (IS_ENABLED_AND (
1246 /* ..the request was blocked */
1247 ( NULL != (rsp = block_url(csp)))
1249 /* ..or untrusted */
1250 #ifdef FEATURE_TRUST
1251 || ( NULL != (rsp = trust_url(csp)))
1252 #endif /* def FEATURE_TRUST */
1254 /* ..or a fast redirect kicked in */
1255 #ifdef FEATURE_FAST_REDIRECTS
1256 || ( NULL != (rsp = redirect_url(csp)))
1257 #endif /* def FEATURE_FAST_REDIRECTS */
1261 /* Write the answer to the client */
1262 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1263 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1265 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1268 #ifdef FEATURE_STATISTICS
1269 /* Count as a rejected request */
1270 csp->flags |= CSP_FLAG_REJECTED;
1271 #endif /* def FEATURE_STATISTICS */
1273 /* Log (FIXME: All intercept reasons appear as "crunch" with Status 200) */
1274 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
1275 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
1277 /* Clean up and return */
1278 free_http_response(rsp);
1282 hdr = sed(client_patterns, add_client_headers, csp);
1285 /* FIXME Should handle error properly */
1286 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1289 list_remove_all(csp->headers);
1291 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1293 if (fwd->forward_host)
1295 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1296 fwd->forward_host, fwd->forward_port, http->hostport);
1300 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1303 /* here we connect to the server, gateway, or the forwarder */
1305 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
1306 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
1308 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
1309 forwarded_connect_retries, http->hostport);
1312 if (csp->sfd == JB_INVALID_SOCKET)
1314 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1317 if (errno == EINVAL)
1319 rsp = error_response(csp, "no-such-domain", errno);
1321 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
1322 csp->ip_addr_str, http->ocmd);
1326 rsp = error_response(csp, "connect-failed", errno);
1328 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1329 csp->ip_addr_str, http->ocmd);
1333 /* Write the answer to the client */
1336 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1337 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1339 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1343 free_http_response(rsp);
1348 log_error(LOG_LEVEL_CONNECT, "OK");
1350 if (fwd->forward_host || (http->ssl == 0))
1352 /* write the client's (modified) header to the server
1353 * (along with anything else that may be in the buffer)
1356 if (write_socket(csp->sfd, hdr, strlen(hdr))
1357 || (flush_socket(csp->sfd, csp) < 0))
1359 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1362 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1363 csp->ip_addr_str, http->ocmd);
1365 rsp = error_response(csp, "connect-failed", errno);
1369 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1370 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1372 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1376 free_http_response(rsp);
1384 * We're running an SSL tunnel and we're not forwarding,
1385 * so just send the "connect succeeded" message to the
1386 * client, flush the rest, and get out of the way.
1388 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1389 csp->ip_addr_str, http->ocmd);
1391 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
1399 /* we're finished with the client's header */
1402 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1404 /* pass data between the client and server
1405 * until one or the other shuts down the connection.
1414 * FD_ZERO here seems to point to an errant macro which crashes.
1415 * So do this by hand for now...
1417 memset(&rfds,0x00,sizeof(fd_set));
1421 FD_SET(csp->cfd, &rfds);
1422 FD_SET(csp->sfd, &rfds);
1424 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
1428 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1432 /* this is the body of the browser's request
1433 * just read it and write it.
1436 if (FD_ISSET(csp->cfd, &rfds))
1438 len = read_socket(csp->cfd, buf, sizeof(buf));
1442 break; /* "game over, man" */
1445 if (write_socket(csp->sfd, buf, (size_t)len))
1447 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1454 * The server wants to talk. It could be the header or the body.
1455 * If `hdr' is null, then it's the header otherwise it's the body.
1456 * FIXME: Does `hdr' really mean `host'? No.
1460 if (FD_ISSET(csp->sfd, &rfds))
1463 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1467 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1469 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1470 csp->ip_addr_str, http->ocmd);
1472 rsp = error_response(csp, "connect-failed", errno);
1476 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1477 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1479 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1483 free_http_response(rsp);
1487 /* Add a trailing zero. This lets filter_popups
1488 * use string operations.
1492 #ifdef FEATURE_KILL_POPUPS
1493 /* Filter the popups on this read. */
1494 if (block_popups_now)
1496 filter_popups(buf, csp);
1498 #endif /* def FEATURE_KILL_POPUPS */
1500 /* Normally, this would indicate that we've read
1501 * as much as the server has sent us and we can
1502 * close the client connection. However, Microsoft
1503 * in its wisdom has released IIS/5 with a bug that
1504 * prevents it from sending the trailing \r\n in
1505 * a 302 redirect header (and possibly other headers).
1506 * To work around this if we've haven't parsed
1507 * a full header we'll append a trailing \r\n
1508 * and see if this now generates a valid one.
1510 * This hack shouldn't have any impacts. If we've
1511 * already transmitted the header or if this is a
1512 * SSL connection, then we won't bother with this
1513 * hack. So we only work on partially received
1514 * headers. If we append a \r\n and this still
1515 * doesn't generate a valid header, then we won't
1516 * transmit anything to the client.
1521 if (server_body || http->ssl)
1524 * If we have been buffering up the document,
1525 * now is the time to apply content modification
1526 * and send the result to the client.
1531 * If the content filter fails, use the original
1532 * buffer and length.
1533 * (see p != NULL ? p : csp->iob->cur below)
1535 if (NULL == (p = (*content_filter)(csp)))
1537 csp->content_length = csp->iob->eod - csp->iob->cur;
1540 hdr = sed(server_patterns_light, NULL, csp);
1544 /* FIXME Should handle error properly */
1545 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1548 if (write_socket(csp->cfd, hdr, strlen(hdr))
1549 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
1551 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1561 break; /* "game over, man" */
1565 * This is NOT the body, so
1566 * Let's pretend the server just sent us a blank line.
1568 len = sprintf(buf, "\r\n");
1571 * Now, let the normal header parsing algorithm below do its
1572 * job. If it fails, we'll exit instead of continuing.
1579 * If this is an SSL connection or we're in the body
1580 * of the server document, just write it to the client,
1581 * unless we need to buffer the body for later content-filtering
1584 if (server_body || http->ssl)
1589 * If there is no memory left for buffering the content, or the buffer limit
1590 * has been reached, switch to non-filtering mode, i.e. make & write the
1591 * header, flush the iob and buf, and get out of the way.
1593 if (add_to_iob(csp, buf, len))
1598 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
1600 hdr = sed(server_patterns, add_server_headers, csp);
1604 * Memory is too tight to even generate the header.
1605 * Send our static "Out-of-memory" page.
1607 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
1608 rsp = cgi_error_memory();
1610 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1611 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1613 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1618 hdrlen = strlen(hdr);
1620 if (write_socket(csp->cfd, hdr, hdrlen)
1621 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
1622 || (write_socket(csp->cfd, buf, (size_t) len)))
1624 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
1630 byte_count += hdrlen + flushed + len;
1632 content_filter = NULL;
1639 if (write_socket(csp->cfd, buf, (size_t)len))
1641 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
1650 /* we're still looking for the end of the
1651 * server's header ... (does that make header
1652 * parsing an "out of body experience" ?
1656 * buffer up the data we just read. If that fails,
1657 * there's little we can do but send our static
1658 * out-of-memory page.
1660 if (add_to_iob(csp, buf, len))
1662 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
1663 rsp = cgi_error_memory();
1665 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1666 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1668 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1673 /* get header lines from the iob */
1675 while ((p = get_header(csp)) != NULL)
1679 /* see following note */
1682 enlist(csp->headers, p);
1686 /* NOTE: there are no "empty" headers so
1687 * if the pointer `p' is not NULL we must
1688 * assume that we reached the end of the
1689 * buffer before we hit the end of the header.
1696 /* Well, we tried our MS IIS/5
1697 * hack and it didn't work.
1698 * The header is incomplete
1699 * and there isn't anything
1700 * we can do about it.
1706 /* Since we have to wait for
1707 * more from the server before
1708 * we can parse the headers
1709 * we just continue here.
1715 /* we have now received the entire header.
1716 * filter it and send the result to the client
1719 hdr = sed(server_patterns, add_server_headers, csp);
1722 /* FIXME Should handle error properly */
1723 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1726 #ifdef FEATURE_KILL_POPUPS
1727 /* Start blocking popups if appropriate. */
1729 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1730 !http->ssl && /* We talk plaintext */
1731 block_popups) /* Policy allows */
1733 block_popups_now = 1;
1735 * Filter the part of the body that came in the same read
1736 * as the last headers:
1738 filter_popups(csp->iob->cur, csp);
1741 #endif /* def FEATURE_KILL_POPUPS */
1743 /* Buffer and pcrs filter this if appropriate. */
1745 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1746 !http->ssl && /* We talk plaintext */
1747 pcrs_filter) /* Policy allows */
1749 content_filter = pcrs_filter_response;
1752 /* Buffer and gif_deanimate this if appropriate. */
1754 if ((csp->content_type & CT_GIF) && /* It's an image/gif MIME-Type */
1755 !http->ssl && /* We talk plaintext */
1756 gif_deanimate) /* Policy allows */
1758 content_filter = gif_deanimate_response;
1761 /* Buffer and jpg_inspect this if appropriate. */
1763 if ((csp->content_type & CT_JPEG) && /* It's an image/jpeg MIME-Type */
1764 !http->ssl && /* We talk plaintext */
1765 jpeg_inspect) /* Policy allows */
1767 content_filter = jpeg_inspect_response;
1771 * Only write if we're not buffering for content modification
1773 if (!content_filter)
1775 /* write the server's (modified) header to
1776 * the client (along with anything else that
1777 * may be in the buffer)
1780 if (write_socket(csp->cfd, hdr, strlen(hdr))
1781 || ((len = flush_socket(csp->cfd, csp)) < 0))
1783 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1785 /* the write failed, so don't bother
1786 * mentioning it to the client...
1787 * it probably can't hear us anyway.
1796 /* we're finished with the server's header */
1801 /* If this was a MS IIS/5 hack then it means
1802 * the server has already closed the
1803 * connection. Nothing more to read. Time
1814 return; /* huh? we should never get here */
1817 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
1818 csp->ip_addr_str, http->ocmd, byte_count);
1822 /*********************************************************************
1826 * Description : This is little more than chat. We only "serve" to
1827 * to close any socket that chat may have opened.
1830 * 1 : csp = Current client state (buffers, headers, etc...)
1834 *********************************************************************/
1836 void serve(struct client_state *csp)
1837 #else /* ifndef AMIGA */
1838 static void serve(struct client_state *csp)
1839 #endif /* def AMIGA */
1842 close_socket(csp->cfd);
1844 if (csp->sfd != JB_INVALID_SOCKET)
1846 close_socket(csp->sfd);
1849 csp->flags &= ~CSP_FLAG_ACTIVE;
1855 /*********************************************************************
1857 * Function : server_thread
1859 * Description : We only exist to call `serve' in a threaded environment.
1862 * 1 : data = Current client state (buffers, headers, etc...)
1864 * Returns : Always 0.
1866 *********************************************************************/
1867 static int32 server_thread(void *data)
1869 serve((struct client_state *) data);
1876 /*********************************************************************
1880 * Description : Print usage info & exit.
1882 * Parameters : Pointer to argv[0] for identifying ourselves
1886 *********************************************************************/
1887 void usage(const char *myname)
1889 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
1891 "Usage: %s [--help] [--version] [configfile]\n"
1893 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
1895 "Aborting.\n", myname);
1902 /*********************************************************************
1906 * Description : Load the config file and start the listen loop.
1907 * This function is a lot more *sane* with the `load_config'
1908 * and `listen_loop' functions; although it stills does
1909 * a *little* too much for my taste.
1912 * 1 : argc = Number of parameters (including $0).
1913 * 2 : argv = Array of (char *)'s to the parameters.
1915 * Returns : 1 if : can't open config file, unrecognized directive,
1916 * stats requested in multi-thread mode, can't open the
1917 * log file, can't open the jar file, listen port is invalid,
1918 * any load fails, and can't bind port.
1920 * Else main never returns, the process must be signaled
1921 * to terminate execution. Or, on Windows, use the
1922 * "File", "Exit" menu option.
1924 *********************************************************************/
1926 int real_main(int argc, const char *argv[])
1928 int main(int argc, const char *argv[])
1933 unsigned int random_seed;
1934 #endif /* ifdef HAVE_RANDOM */
1936 struct passwd *pw = NULL;
1937 struct group *grp = NULL;
1946 #if !defined(_WIN32)
1954 * Parse the command line arguments
1956 while (++argc_pos < argc)
1959 /* Check to see if the service must be installed or uninstalled */
1960 if (strncmp(argv[argc_pos], "--install", 9) == 0)
1962 const char *pName = argv[argc_pos] + 9;
1965 exit( (install_service(pName)) ? 0 : 1 );
1967 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
1969 const char *pName = argv[argc_pos] + 11;
1972 exit((uninstall_service(pName)) ? 0 : 1);
1974 else if (strcmp(argv[argc_pos], "--service" ) == 0)
1976 bRunAsService = TRUE;
1977 w32_set_service_cwd();
1978 atexit(w32_service_exit_notify);
1981 #endif /* defined(_WIN32) */
1984 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1986 if (strcmp(argv[argc_pos], "--help") == 0)
1991 else if(strcmp(argv[argc_pos], "--version") == 0)
1993 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
1999 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
2004 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
2006 if (++argc_pos == argc) usage(argv[0]);
2007 pidfile = strdup(argv[argc_pos]);
2010 else if (strcmp(argv[argc_pos], "--user" ) == 0)
2012 if (++argc_pos == argc) usage(argv[argc_pos]);
2014 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
2017 if (NULL == (grp = getgrnam(p)))
2019 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
2023 if (NULL == (pw = getpwnam(argv[argc_pos])))
2025 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
2028 if (p != NULL) *--p = '\0';
2031 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
2036 #endif /* defined(unix) */
2037 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
2039 configfile = argv[argc_pos];
2042 } /* -END- while (more arguments) */
2045 if ( *configfile != '/' )
2047 char *abs_file, cwd[1024];
2049 /* make config-filename absolute here */
2050 if ( !(getcwd(cwd, sizeof(cwd))))
2052 perror("get working dir failed");
2056 if (!(basedir = strdup(cwd))
2057 || (!(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))))
2059 perror("malloc failed");
2062 strcpy( abs_file, basedir );
2063 strcat( abs_file, "/" );
2064 strcat( abs_file, configfile );
2065 configfile = abs_file;
2067 #endif /* defined unix */
2071 clients->next = NULL;
2075 #elif defined(_WIN32)
2079 #ifdef FEATURE_PTHREAD
2081 * Prepare global mutex semaphores
2083 pthread_mutex_init(&log_mutex,0);
2084 pthread_mutex_init(&log_init_mutex,0);
2086 #ifndef HAVE_GMTIME_R
2087 pthread_mutex_init(&gmtime_mutex,0);
2088 #endif /* ndef HAVE_GMTIME_R */
2090 #ifndef HAVE_LOCALTIME_R
2091 pthread_mutex_init(&localtime_mutex,0);
2092 #endif /* ndef HAVE_GMTIME_R */
2094 #ifndef HAVE_GETHOSTBYADDR_R
2095 pthread_mutex_init(&gethostbyaddr_mutex,0);
2096 #endif /* ndef HAVE_GETHOSTBYADDR_R */
2098 #ifndef HAVE_GETHOSTBYNAME_R
2099 pthread_mutex_init(&gethostbyname_mutex,0);
2100 #endif /* ndef HAVE_GETHOSTBYNAME_R */
2101 #endif /* FEATURE_PTHREAD */
2104 random_seed = (unsigned int)time(NULL);
2105 srandom(random_seed);
2106 #endif /* ifdef HAVE_RANDOM */
2109 * Unix signal handling
2111 * Catch the abort, interrupt and terminate signals for a graceful exit
2112 * Catch the hangup signal so the errlog can be reopened.
2113 * Ignore the broken pipe signals (FIXME: Why?)
2115 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
2118 const int catched_signals[] = { SIGABRT, SIGTERM, SIGINT, SIGHUP, 0 };
2119 const int ignored_signals[] = { SIGPIPE, 0 };
2121 for (idx = 0; catched_signals[idx] != 0; idx++)
2123 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
2124 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
2126 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
2127 #endif /* ifdef sun */
2129 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
2133 for (idx = 0; ignored_signals[idx] != 0; idx++)
2135 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
2137 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
2142 #else /* ifdef _WIN32 */
2143 # ifdef _WIN_CONSOLE
2145 * We *are* in a windows console app.
2146 * Print a verbose messages about FAQ's and such
2148 printf(win32_blurb);
2149 # endif /* def _WIN_CONSOLE */
2150 #endif /* def _WIN32 */
2153 /* Initialize the CGI subsystem */
2154 cgi_init_error_messages();
2157 * If runnig on unix and without the --nodaemon
2158 * option, become a daemon. I.e. fork, detach
2159 * from tty and get process group leadership
2172 if ( pid < 0 ) /* error */
2177 else if ( pid != 0 ) /* parent */
2182 * must check for errors
2183 * child died due to missing files aso
2186 wpid = waitpid( pid, &status, WNOHANG );
2195 /* Should be more portable, but not as well tested */
2200 #else /* ndef __FreeBSD__ */
2202 #endif /* ndef __FreeBSD__ */
2203 fd = open("/dev/tty", O_RDONLY);
2206 /* no error check here */
2207 ioctl( fd, TIOCNOTTY,0 );
2211 /* FIXME: should close stderr (fd 2) here too, but the test
2213 * and load config file is done in listen_loop() and puts
2214 * some messages on stderr there.
2221 } /* -END- if (!no_daemon) */
2224 * As soon as we have written the PID file, we can switch
2225 * to the user and group ID indicated by the --user option
2231 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
2233 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
2239 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
2241 if (chroot(pw->pw_dir) < 0)
2243 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
2247 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
2250 if (setuid(pw->pw_uid))
2252 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
2256 char putenv_dummy[64];
2258 strcpy(putenv_dummy, "HOME=/");
2259 if (putenv(putenv_dummy) != 0)
2261 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
2264 snprintf(putenv_dummy, 64, "USER=%s", pw->pw_name);
2265 if (putenv(putenv_dummy) != 0)
2267 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
2273 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
2276 #endif /* defined unix */
2279 /* This will be FALSE unless the command line specified --service
2283 /* Yup, so now we must attempt to establish a connection
2284 * with the service dispatcher. This will only work if this
2285 * process was launched by the service control manager to
2286 * actually run as a service. If this isn't the case, i've
2287 * known it take around 30 seconds or so for the call to return.
2290 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
2291 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
2293 /* Service has run, and at this point is now being stopped, so just return */
2298 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
2300 /* An error occurred. Usually it's because --service was wrongly specified
2301 * and we were unable to connect to the Service Control Dispatcher because
2302 * it wasn't expecting us and is therefore not listening.
2304 * For now, just continue below to call the listen_loop function.
2307 #endif /* def _WIN32 */
2317 /*********************************************************************
2319 * Function : bind_port_helper
2321 * Description : Bind the listen port. Handles logging, and aborts
2325 * 1 : config = Privoxy configuration. Specifies port
2328 * Returns : Port that was opened.
2330 *********************************************************************/
2331 static jb_socket bind_port_helper(struct configuration_spec * config)
2336 if ( (config->haddr != NULL)
2337 && (config->haddr[0] == '1')
2338 && (config->haddr[1] == '2')
2339 && (config->haddr[2] == '7')
2340 && (config->haddr[3] == '.') )
2342 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
2345 else if (config->haddr == NULL)
2347 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
2352 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
2353 config->hport, config->haddr);
2356 result = bind_port(config->haddr, config->hport, &bfd);
2363 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2364 "There may be another Privoxy or some other "
2365 "proxy running on port %d",
2366 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
2367 config->hport, config->hport);
2370 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2371 "The hostname is not resolvable",
2372 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2375 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
2376 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2379 /* shouldn't get here */
2380 return JB_INVALID_SOCKET;
2383 config->need_bind = 0;
2390 /* Without this simple workaround we get this compiler warning from _beginthread
2391 * warning C4028: formal parameter 1 different from declaration
2393 void w32_service_listen_loop(void *p)
2397 #endif /* def _WIN32 */
2400 /*********************************************************************
2402 * Function : listen_loop
2404 * Description : bind the listen port and enter a "FOREVER" listening loop.
2410 *********************************************************************/
2411 static void listen_loop(void)
2413 struct client_state *csp = NULL;
2415 struct configuration_spec * config;
2417 config = load_config();
2419 bfd = bind_port_helper(config);
2421 #ifdef FEATURE_GRACEFUL_TERMINATION
2422 while (!g_terminate)
2427 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
2428 while (waitpid(-1, NULL, WNOHANG) > 0)
2430 /* zombie children */
2432 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
2435 * Free data that was used by died threads
2441 * Re-open the errlog after HUP signal
2443 if (received_hup_signal)
2445 init_error_log(Argv[0], config->logfile, config->debug);
2446 received_hup_signal = 0;
2451 #ifdef FEATURE_COOKIE_JAR
2453 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
2454 * already open. I think unload_configfile() is not being run, which should do
2455 * this work. Until that can get resolved, we'll use this workaround.
2459 if (csp->config->jar)
2461 fclose(csp->config->jar);
2462 csp->config->jar = NULL;
2464 #endif /* FEATURE_COOKIE_JAR */
2465 #endif /* __OS2__ */
2467 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
2469 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
2473 csp->flags |= CSP_FLAG_ACTIVE;
2474 csp->sfd = JB_INVALID_SOCKET;
2476 csp->config = config = load_config();
2478 if ( config->need_bind )
2481 * Since we were listening to the "old port", we will not see
2482 * a "listen" param change until the next IJB request. So, at
2483 * least 1 more request must be made for us to find the new
2484 * setting. I am simply closing the old socket and binding the
2487 * Which-ever is correct, we will serve 1 more page via the
2488 * old settings. This should probably be a "show-proxy-args"
2489 * request. This should not be a so common of an operation
2490 * that this will hurt people's feelings.
2495 bfd = bind_port_helper(config);
2498 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
2500 if (!accept_connection(csp, bfd))
2502 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
2515 log_error(LOG_LEVEL_CONNECT, "OK");
2518 #ifdef FEATURE_TOGGLE
2519 if (global_toggle_state)
2521 csp->flags |= CSP_FLAG_TOGGLED_ON;
2523 #endif /* def FEATURE_TOGGLE */
2525 if (run_loader(csp))
2527 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
2528 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2532 if (block_acl(NULL,csp))
2534 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
2535 close_socket(csp->cfd);
2539 #endif /* def FEATURE_ACL */
2541 /* add it to the list of clients */
2542 csp->next = clients->next;
2543 clients->next = csp;
2545 if (config->multi_threaded)
2549 /* this is a switch () statment in the C preprocessor - ugh */
2550 #undef SELECTED_ONE_OPTION
2552 /* Use Pthreads in preference to native code */
2553 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
2554 #define SELECTED_ONE_OPTION
2556 pthread_t the_thread;
2557 pthread_attr_t attrs;
2559 pthread_attr_init(&attrs);
2560 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
2561 errno = pthread_create(&the_thread, &attrs,
2563 child_id = errno ? -1 : 0;
2564 pthread_attr_destroy(&attrs);
2568 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
2569 #define SELECTED_ONE_OPTION
2570 child_id = _beginthread(
2571 (void (*)(void *))serve,
2576 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
2577 #define SELECTED_ONE_OPTION
2578 child_id = _beginthread(
2579 (void(* _Optlink)(void*))serve,
2585 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
2586 #define SELECTED_ONE_OPTION
2588 thread_id tid = spawn_thread
2589 (server_thread, "server", B_NORMAL_PRIORITY, csp);
2591 if ((tid >= 0) && (resume_thread(tid) == B_OK))
2593 child_id = (int) tid;
2602 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2603 #define SELECTED_ONE_OPTION
2604 csp->cfd = ReleaseSocket(csp->cfd, -1);
2606 if((child_id = (int)CreateNewProcTags(
2607 NP_Entry, (ULONG)server_thread,
2608 NP_Output, Output(),
2609 NP_CloseOutput, FALSE,
2610 NP_Name, (ULONG)"privoxy child",
2611 NP_StackSize, 200*1024,
2615 ((struct Task *)child_id)->tc_UserData = csp;
2616 Signal((struct Task *)child_id, SIGF_SINGLE);
2621 #if !defined(SELECTED_ONE_OPTION)
2624 /* This block is only needed when using fork().
2625 * When using threads, the server thread was
2626 * created and run by the call to _beginthread().
2628 if (child_id == 0) /* child */
2631 #ifdef FEATURE_TOGGLE
2632 int inherited_toggle_state = global_toggle_state;
2633 #endif /* def FEATURE_TOGGLE */
2638 * If we've been toggled or we've blocked the request, tell Mom
2641 #ifdef FEATURE_TOGGLE
2642 if (inherited_toggle_state != global_toggle_state)
2644 rc |= RC_FLAG_TOGGLED;
2646 #endif /* def FEATURE_TOGGLE */
2648 #ifdef FEATURE_STATISTICS
2649 if (csp->flags & CSP_FLAG_REJECTED)
2651 rc |= RC_FLAG_BLOCKED;
2653 #endif /* ndef FEATURE_STATISTICS */
2657 else if (child_id > 0) /* parent */
2659 /* in a fork()'d environment, the parent's
2660 * copy of the client socket and the CSP
2664 #if !defined(_WIN32) && !defined(__CYGWIN__)
2666 wait( &child_status );
2669 * Evaluate child's return code: If the child has
2670 * - been toggled, toggle ourselves
2671 * - blocked its request, bump up the stats counter
2674 #ifdef FEATURE_TOGGLE
2675 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
2677 global_toggle_state = !global_toggle_state;
2679 #endif /* def FEATURE_TOGGLE */
2681 #ifdef FEATURE_STATISTICS
2683 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
2687 #endif /* def FEATURE_STATISTICS */
2689 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
2690 close_socket(csp->cfd);
2691 csp->flags &= ~CSP_FLAG_ACTIVE;
2695 #undef SELECTED_ONE_OPTION
2696 /* end of cpp switch () */
2698 if (child_id < 0) /* failed */
2700 char buf[BUFFER_SIZE];
2702 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
2704 sprintf(buf , "Privoxy: can't fork: errno = %d", errno);
2706 write_socket(csp->cfd, buf, strlen(buf));
2707 close_socket(csp->cfd);
2708 csp->flags &= ~CSP_FLAG_ACTIVE;
2719 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
2721 /* Clean up. Aim: free all memory (no leaks) */
2722 #ifdef FEATURE_GRACEFUL_TERMINATION
2724 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
2726 unload_current_config_file();
2727 unload_current_actions_file();
2728 unload_current_re_filterfile();
2729 #ifdef FEATURE_TRUST
2730 unload_current_trust_file();
2733 if (config->multi_threaded)
2740 } while ((clients->next != NULL) && (--i > 0));
2744 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
2755 #ifdef FEATURE_COOKIE_JAR
2756 if (NULL != config->jar)
2758 fclose(config->jar);
2762 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
2763 /* Cleanup - remove taskbar icon etc. */
2768 #endif /* FEATURE_GRACEFUL_TERMINATION */