1 const char jcc_rcs[] = "$Id: jcc.c,v 1.103 2006/09/21 12:54:43 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 1.103 2006/09/21 12:54:43 fabiankeil
37 * Fix +redirect{}. Didn't work with -fast-redirects.
39 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
40 * Respond with 400 and a short text message
41 * if the client tries to use Privoxy as FTP proxy.
43 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
44 * Make number of retries in case of forwarded-connect problems
45 * a config file option (forwarded-connect-retries) and use 0 as
48 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
51 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
52 * Follow the OpenBSD port's lead and protect the resolve
53 * functions on OpenBSD as well.
55 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
56 * --user fix. Only use the user as group if no group is specified.
57 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
59 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
60 * Windows service (re-)integration
64 * --install[:service_name]
65 * --uninstall[:service_name]
68 * They work as follows:
69 * --install will create a service for you and then terminate.
70 * By default the service name will be "privoxy" (without the quotes).
71 * However you can run multiple services if you wish, just by adding
72 * a colon and then a name (no spaces).
74 * --uninstall follows the exact same rules a --install.
76 * --service is used when the program is executed by the service
77 * control manager, and in normal circumstances would never be
78 * used as a command line argument.
80 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
81 * Windows service integration
83 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
84 * Incorporate Fabian Keil's patch work:
\rhttp://www.fabiankeil.de/sourcecode/privoxy/
86 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
87 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
88 * with what was really the latest development (the v_3_0_branch branch)
90 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
91 * Thanks to Jindrich Makovicka for a race condition fix for the log
92 * file. The race condition remains for non-pthread implementations.
93 * Reference patch #1175720.
95 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
96 * Add the ability to check jpeg images for invalid
97 * lengths of comment blocks. Defensive strategy
98 * against the exploit:
99 * Microsoft Security Bulletin MS04-028
100 * Buffer Overrun in JPEG Processing (GDI+) Could
101 * Allow Code Execution (833987)
102 * Enabled with +inspect-jpegs in actions files.
104 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
105 * - Fixed usage info for non-unix platforms
106 * - Fixed small cmdline parsing bug
108 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
109 * Diagnostics: Now preserve the returncode of pthread_create
110 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
112 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
113 * No longer ignore SIGCHLD. Fixes bug #769381
115 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
116 * Close jarfile on graceful exit, remove stray line
118 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
119 * Cosmetics: Killed a warning, a typo and an allocation left at exit
121 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
122 * No longer rely on non-POSIX.1 extensions of getcwd().
125 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
126 * Replaced setenv() by posix-compliant putenv()
127 * Thanks to Neil McCalden (nmcc AT users.sf.net).
129 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
130 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
132 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
133 * Clean-up and extension of improvements for forked mode:
134 * - Child's return code now consists of flags RC_FLAG_*
135 * - Reporting toggle to parent now properly #ifdef'ed
136 * - Children now report blocking to parent. This enables
137 * statistics in forked mode
139 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
140 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
141 * Children now report having been toggled through _exit(17), parents
142 * watch for that code and toggle themselves if found.
144 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
145 * Wrapping all *_r functions (the non-_r versions of them) with
146 * mutex semaphores for OSX. Hopefully this will take care of all
147 * of those pesky crash reports.
149 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
150 * Fixed two mostly harmless mem leaks
152 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
153 * Fix: Head of global clients list now initialized to NULL
155 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
156 * Added basic support for OPTIONS and TRACE HTTP methods:
157 * - New interceptor direct_response() added in chat().
158 * - sed() moved to earlier in the process, so that the
159 * Host: header is evaluated before actions and forwarding
162 * Revision 1.92 2002/05/08 16:00:46 oes
163 * Chat's buffer handling:
164 * - Fixed bug with unchecked out-of-mem conditions
165 * while reading client request & server headers
166 * - No longer predict if the buffer limit will be exceeded
167 * in the next read -- check add_to_iob's new
168 * return code. If buffer couldn't be extended
169 * (policy or out-of-mem) while
170 * - reading from client: abort
171 * - reading server headers: send error page
172 * - buffering server body for filter: flush,
173 * and if that fails: send error page
175 * Revision 1.91 2002/04/08 20:35:58 swa
178 * Revision 1.90 2002/04/02 14:57:28 oes
179 * Made sending wafers independent of FEATURE_COOKIE_JAR
181 * Revision 1.89 2002/03/31 17:18:59 jongfoster
182 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
184 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
185 * More compiler warning message maintenance
187 * Revision 1.87 2002/03/26 22:29:54 swa
188 * we have a new homepage!
190 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
191 * Workaround for closing the jarfile before load_config() comes around again
193 * Revision 1.85 2002/03/24 15:23:33 jongfoster
196 * Revision 1.84 2002/03/24 13:25:43 swa
197 * name change related issues
199 * Revision 1.83 2002/03/16 23:54:06 jongfoster
200 * Adding graceful termination feature, to help look for memory leaks.
201 * If you enable this (which, by design, has to be done by hand
202 * editing config.h) and then go to http://i.j.b/die, then the program
203 * will exit cleanly after the *next* request. It should free all the
204 * memory that was used.
206 * Revision 1.82 2002/03/13 00:27:05 jongfoster
209 * Revision 1.81 2002/03/12 01:42:50 oes
210 * Introduced modular filters
212 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
213 * OS/2 port maintenance:
214 * - Fixed EMX build - it had decayed a little
215 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
216 * substituted a memset for now.
218 * Revision 1.79 2002/03/09 20:03:52 jongfoster
219 * - Making various functions return int rather than size_t.
220 * (Undoing a recent change). Since size_t is unsigned on
221 * Windows, functions like read_socket that return -1 on
222 * error cannot return a size_t.
224 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
225 * crashes, and also frequently caused JB to jump to 100%
226 * CPU and stay there. (Because it thought it had just
227 * read ((unsigned)-1) == 4Gb of data...)
229 * - The signature of write_socket has changed, it now simply
230 * returns success=0/failure=nonzero.
232 * - Trying to get rid of a few warnings --with-debug on
233 * Windows, I've introduced a new type "jb_socket". This is
234 * used for the socket file descriptors. On Windows, this
235 * is SOCKET (a typedef for unsigned). Everywhere else, it's
236 * an int. The error value can't be -1 any more, so it's
237 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
238 * Windows it maps to the #define INVALID_SOCKET.)
240 * - The signature of bind_port has changed.
242 * Revision 1.78 2002/03/08 21:35:04 oes
243 * Added optional group supplement to --user option. Will now use default group of user if no group given
245 * Revision 1.77 2002/03/07 03:52:06 oes
246 * - Fixed compiler warnings etc
247 * - Improved handling of failed DNS lookups
249 * Revision 1.76 2002/03/06 22:54:35 jongfoster
250 * Automated function-comment nitpicking.
252 * Revision 1.75 2002/03/06 10:02:19 oes
253 * Fixed stupid bug when --user was not given
255 * Revision 1.74 2002/03/06 00:49:31 jongfoster
256 * Fixing warning on Windows
257 * Making #ifdefs that refer to the same variable consistently
258 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
260 * Revision 1.73 2002/03/05 23:57:30 hal9
261 * Stray character 's' on line 1618 was breaking build.
263 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
264 * - Re-enable OS/2 building after new parms were added
265 * - Fix false out of memory report when resolving CGI templates when no IP
266 * address is available of failed attempt (a la no such domain)
268 * Revision 1.71 2002/03/05 18:13:56 oes
269 * Added --user option
271 * Revision 1.70 2002/03/05 04:52:42 oes
272 * Deleted non-errlog debugging code
274 * Revision 1.69 2002/03/04 23:50:00 jongfoster
275 * Splitting off bind_port() call into bind_port_helper(), with
278 * Revision 1.68 2002/03/04 20:17:32 oes
281 * Revision 1.67 2002/03/04 18:18:57 oes
282 * - Removed _DEBUG mode
283 * - Cleand up cmdline parsing
284 * - Introduced --no-daemon, --pidfile options
285 * - Cleaned up signal handling:
286 * - Terminate cleanly on INT, TERM and ABRT
287 * - Schedule logfile for re-opening on HUP
288 * - Ignore CHLD and PIPE
289 * - Leave the rest with their default handlers
290 * - Uniform handler registration
291 * - Added usage() function
292 * - Played styleguide police
294 * Revision 1.66 2002/03/03 15:06:55 oes
295 * Re-enabled automatic config reloading
297 * Revision 1.65 2002/03/03 14:49:11 oes
298 * Fixed CLF logging: Now uses client's original HTTP request
300 * Revision 1.64 2002/03/03 09:18:03 joergs
301 * Made jumbjuster work on AmigaOS again.
303 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
304 * Clean up a little CRLF unpleasantness that suddenly appeared
306 * Revision 1.62 2002/02/20 23:17:23 jongfoster
307 * Detecting some out-of memory conditions and exiting with a log message.
309 * Revision 1.61 2002/01/17 21:01:52 jongfoster
310 * Moving all our URL and URL pattern parsing code to urlmatch.c.
312 * Revision 1.60 2001/12/30 14:07:32 steudten
313 * - Add signal handling (unix)
314 * - Add SIGHUP handler (unix)
315 * - Add creation of pidfile (unix)
316 * - Add action 'top' in rc file (RH)
317 * - Add entry 'SIGNALS' to manpage
318 * - Add exit message to logfile (unix)
320 * Revision 1.59 2001/12/13 14:07:18 oes
321 * Fixed Bug: 503 error page now sent OK
323 * Revision 1.58 2001/11/30 23:37:24 jongfoster
324 * Renaming the Win32 config file to config.txt - this is almost the
325 * same as the corresponding UNIX name "config"
327 * Revision 1.57 2001/11/16 00:47:43 jongfoster
328 * Changing the tty-disconnection code to use setsid().
330 * Revision 1.56 2001/11/13 20:20:54 jongfoster
331 * Tabs->spaces, fixing a bug with missing {} around an if()
333 * Revision 1.55 2001/11/13 20:14:53 jongfoster
334 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
336 * Revision 1.54 2001/11/07 00:03:14 steudten
337 * Give reliable return value if an error
338 * occurs not just 0 with new daemon mode.
340 * Revision 1.53 2001/11/05 21:41:43 steudten
341 * Add changes to be a real daemon just for unix os.
342 * (change cwd to /, detach from controlling tty, set
343 * process group and session leader to the own process.
345 * Add some fatal-error log message for failed malloc().
346 * Add '-d' if compiled with 'configure --with-debug' to
347 * enable debug output.
349 * Revision 1.52 2001/10/26 20:11:20 jongfoster
350 * Fixing type mismatch
352 * Revision 1.51 2001/10/26 17:38:28 oes
355 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
356 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
357 * threads to call select() simultaneously. So, it's time to do a real, live,
358 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
359 * (native). Both versions will work, but using __OS2__ offers multi-threading.
361 * Revision 1.49 2001/10/23 21:41:35 jongfoster
362 * Added call to initialize the (statically-allocated of course)
363 * "out of memory" CGI response.
365 * Revision 1.48 2001/10/10 19:56:46 jongfoster
366 * Moving some code that wasn't cookie-related out of an #ifdef
369 * Revision 1.47 2001/10/10 16:44:36 oes
370 * Added CONNECT destination port limitation check
372 * Revision 1.46 2001/10/08 15:17:41 oes
373 * Re-enabled SSL forwarding
375 * Revision 1.45 2001/10/07 15:42:11 oes
376 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
378 * Moved downgrading of the HTTP version from parse_http_request to
379 * chat(), since we can't decide if it is necessary before we have
380 * determined the actions for the URL. The HTTP command is now
381 * *always* re-built so the repairs need no longer be special-cased.
383 * filter_popups now gets a csp pointer so it can raise the new
384 * CSP_FLAG_MODIFIED flag.
388 * Added configurable size limit for the IOB. If the IOB grows so
389 * large that the next read would exceed the limit, the header
390 * is generated, and the header & unfiltered buffer are flushed
391 * to the client. Chat then continues in non-buffering,
392 * non-filtering body mode.
394 * Revision 1.44 2001/10/02 18:13:57 oes
397 * Revision 1.43 2001/10/02 15:32:13 oes
398 * Moved generation of hdr
400 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
401 * Cleaning up 2 compiler warnings on OS/2.
403 * Revision 1.41 2001/09/16 17:05:14 jongfoster
404 * Removing unused #include showarg.h
406 * Revision 1.40 2001/09/16 15:41:45 jongfoster
407 * Fixing signed/unsigned comparison warning.
409 * Revision 1.39 2001/09/16 13:21:27 jongfoster
410 * Changes to use new list functions.
412 * Revision 1.38 2001/09/16 13:01:46 jongfoster
413 * Removing redundant function call that zeroed zalloc()'d memory.
415 * Revision 1.37 2001/09/10 11:12:24 oes
416 * Deleted unused variable
418 * Revision 1.36 2001/09/10 10:56:15 oes
419 * Silenced compiler warnings
421 * Revision 1.35 2001/07/31 14:44:22 oes
422 * Deleted unused size parameter from filter_popups()
424 * Revision 1.34 2001/07/30 22:08:36 jongfoster
425 * Tidying up #defines:
426 * - All feature #defines are now of the form FEATURE_xxx
427 * - Permanently turned off WIN_GUI_EDIT
428 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
430 * Revision 1.33 2001/07/29 19:32:00 jongfoster
431 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
433 * Revision 1.32 2001/07/29 18:47:05 jongfoster
434 * Adding missing #include "loadcfg.h"
436 * Revision 1.31 2001/07/29 12:17:48 oes
437 * Applied pthread fix by Paul Lieverse
439 * Revision 1.30 2001/07/25 22:57:13 jongfoster
440 * __BEOS__ no longer overrides FEATURE_PTHREAD.
441 * This is because FEATURE_PTHREAD will soon be widely used, so I
442 * want to keep it simple.
444 * Revision 1.29 2001/07/24 12:47:06 oes
445 * Applied BeOS support update by Eugenia
447 * Revision 1.28 2001/07/23 13:26:12 oes
448 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
450 * Revision 1.27 2001/07/19 19:09:47 haroon
451 * - Added code to take care of the situation where while processing the first
452 * server response (which includes the server header), after finding the end
453 * of the headers we were not looking past the end of the headers for
454 * content modification. I enabled it for filter_popups.
455 * Someone else should look to see if other similar operations should be
456 * done to the discarded portion of the buffer.
458 * Note 2001/07/20: No, the other content modification mechanisms will process
459 * the whole iob later anyway. --oes
461 * Revision 1.26 2001/07/18 12:31:36 oes
464 * Revision 1.25 2001/07/15 19:43:49 jongfoster
465 * Supports POSIX threads.
466 * Also removed some unused #includes.
468 * Revision 1.24 2001/07/13 14:00:40 oes
469 * - Generic content modification scheme:
470 * Each feature has its own applicability flag that is set
471 * from csp->action->flags.
472 * Replaced the "filtering" int flag , by a function pointer
473 * "content_filter" to the function that will do the content
474 * modification. If it is != NULL, the document will be buffered
475 * and processed through *content_filter, which must set
476 * csp->content_length and return a modified copy of the body
477 * or return NULL (on failiure).
478 * - Changed csp->is_text to the more generic bitmap csp->content_type
479 * which can currently take the valued CT_TEXT or CT_GIF
481 * - Removed all #ifdef PCRS
483 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
484 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
485 * the `block_acl' call. This prevents a compilation error when the user
486 * does not wish to use the "ACL" feature.
488 * Revision 1.22 2001/06/29 21:45:41 oes
489 * Indentation, CRLF->LF, Tab-> Space
491 * Revision 1.21 2001/06/29 13:29:36 oes
492 * - Cleaned up, improved comments
493 * - Unified all possible interceptors (CGI,
494 * block, trust, fast_redirect) in one
495 * place, with one (CGI) answer generation
496 * mechansim. Much clearer now.
497 * - Removed the GIF image generation, which
498 * is now done in filters.c:block_url()
499 * - Made error conditions like domain lookup
500 * failiure or (various) problems while talking
501 * to the server use cgi.c:error_response()
502 * instead of generating HTML/HTTP in chat() (yuck!)
503 * - Removed logentry from cancelled commit
505 * Revision 1.20 2001/06/09 10:55:28 jongfoster
506 * Changing BUFSIZ ==> BUFFER_SIZE
508 * Revision 1.19 2001/06/07 23:12:52 jongfoster
509 * Replacing function pointer in struct gateway with a directly
510 * called function forwarded_connect().
511 * Replacing struct gateway with struct forward_spec
513 * Revision 1.18 2001/06/03 19:12:16 oes
514 * introduced new cgi handling
516 * Revision 1.17 2001/06/01 20:07:23 jongfoster
517 * Now uses action +image-blocker{} rather than config->tinygif
519 * Revision 1.16 2001/06/01 18:49:17 jongfoster
520 * Replaced "list_share" with "list" - the tiny memory gain was not
521 * worth the extra complexity.
523 * Revision 1.15 2001/05/31 21:24:47 jongfoster
524 * Changed "permission" to "action" throughout.
525 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
526 * Moved vanilla wafer check into chat(), since we must now
527 * decide whether or not to add it based on the URL.
529 * Revision 1.14 2001/05/29 20:14:01 joergs
530 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
533 * Revision 1.13 2001/05/29 09:50:24 jongfoster
534 * Unified blocklist/imagelist/permissionslist.
535 * File format is still under discussion, but the internal changes
538 * Also modified interceptor behaviour:
539 * - We now intercept all URLs beginning with one of the following
540 * prefixes (and *only* these prefixes):
542 * * http://ijbswa.sf.net/config/
543 * * http://ijbswa.sourceforge.net/config/
544 * - New interceptors "home page" - go to http://i.j.b/ to see it.
545 * - Internal changes so that intercepted and fast redirect pages
546 * are not replaced with an image.
547 * - Interceptors now have the option to send a binary page direct
548 * to the client. (i.e. ijb-send-banner uses this)
549 * - Implemented show-url-info interceptor. (Which is why I needed
550 * the above interceptors changes - a typical URL is
551 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
552 * The previous mechanism would not have intercepted that, and
553 * if it had been intercepted then it then it would have replaced
556 * Revision 1.12 2001/05/27 22:17:04 oes
558 * - re_process_buffer no longer writes the modified buffer
559 * to the client, which was very ugly. It now returns the
560 * buffer, which it is then written by chat.
562 * - content_length now adjusts the Content-Length: header
563 * for modified documents rather than crunch()ing it.
564 * (Length info in csp->content_length, which is 0 for
565 * unmodified documents)
567 * - For this to work, sed() is called twice when filtering.
569 * Revision 1.11 2001/05/26 17:27:53 jongfoster
570 * Added support for CLF and fixed LOG_LEVEL_LOG.
571 * Also did CRLF->LF fix of my previous patch.
573 * Revision 1.10 2001/05/26 15:26:15 jongfoster
574 * ACL feature now provides more security by immediately dropping
575 * connections from untrusted hosts.
577 * Revision 1.9 2001/05/26 00:28:36 jongfoster
578 * Automatic reloading of config file.
579 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
580 * Most of the global variables have been moved to a new
581 * struct configuration_spec, accessed through csp->config->globalname
582 * Most of the globals remaining are used by the Win32 GUI.
584 * Revision 1.8 2001/05/25 22:43:18 jongfoster
585 * Fixing minor memory leak and buffer overflow.
587 * Revision 1.7 2001/05/25 22:34:30 jongfoster
590 * Revision 1.6 2001/05/23 00:13:58 joergs
591 * AmigaOS support fixed.
593 * Revision 1.5 2001/05/22 18:46:04 oes
595 * - Enabled filtering banners by size rather than URL
596 * by adding patterns that replace all standard banner
597 * sizes with the "Junkbuster" gif to the re_filterfile
599 * - Enabled filtering WebBugs by providing a pattern
600 * which kills all 1x1 images
602 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
603 * which is selected by the (nonstandard and therefore
604 * capital) letter 'U' in the option string.
605 * It causes the quantifiers to be ungreedy by default.
606 * Appending a ? turns back to greedy (!).
608 * - Added a new interceptor ijb-send-banner, which
609 * sends back the "Junkbuster" gif. Without imagelist or
610 * MSIE detection support, or if tinygif = 1, or the
611 * URL isn't recognized as an imageurl, a lame HTML
612 * explanation is sent instead.
614 * - Added new feature, which permits blocking remote
615 * script redirects and firing back a local redirect
617 * The feature is conditionally compiled, i.e. it
618 * can be disabled with --disable-fast-redirects,
619 * plus it must be activated by a "fast-redirects"
620 * line in the config file, has its own log level
621 * and of course wants to be displayed by show-proxy-args
622 * Note: Boy, all the #ifdefs in 1001 locations and
623 * all the fumbling with configure.in and acconfig.h
624 * were *way* more work than the feature itself :-(
626 * - Because a generic redirect template was needed for
627 * this, tinygif = 3 now uses the same.
629 * - Moved GIFs, and other static HTTP response templates
634 * - Removed some >400 CRs again (Jon, you really worked
637 * Revision 1.4 2001/05/21 19:34:01 jongfoster
638 * Made failure to bind() a fatal error.
640 * Revision 1.3 2001/05/20 01:21:20 jongfoster
641 * Version 2.9.4 checkin.
642 * - Merged popupfile and cookiefile, and added control over PCRS
643 * filtering, in new "permissionsfile".
644 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
645 * file error you now get a message box (in the Win32 GUI) rather
646 * than the program exiting with no explanation.
647 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
649 * - Removed tabs from "config"
650 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
651 * - Bumped up version number.
653 * Revision 1.2 2001/05/17 22:34:44 oes
654 * - Added hint on GIF char array generation to jcc.c
655 * - Cleaned CRLF's from the sources and related files
656 * - Repaired logging for REF and FRC
658 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
659 * Initial import of version 2.9.3 source tree
662 *********************************************************************/
668 #include <sys/types.h>
675 #ifdef FEATURE_PTHREAD
677 #endif /* def FEATURE_PTHREAD */
680 # ifndef FEATURE_PTHREAD
684 # include <windows.h>
685 # include <process.h>
686 # endif /* ndef FEATURE_PTHREAD */
689 # ifndef _WIN_CONSOLE
691 # endif /* ndef _WIN_CONSOLE */
692 # include "w32svrapi.h"
694 #else /* ifndef _WIN32 */
696 # if !defined (__OS2__)
698 # include <sys/wait.h>
699 # endif /* ndef __OS2__ */
700 # include <sys/time.h>
701 # include <sys/stat.h>
702 # include <sys/ioctl.h>
705 #include <sys/termios.h>
716 # include <socket.h> /* BeOS has select() for sockets only. */
717 # include <OS.h> /* declarations for threads and stuff. */
720 # if defined(__EMX__) || defined(__OS2__)
721 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
726 #define bzero(B,N) memset(B,0x00,n)
741 #include "killpopup.h"
742 #include "miscutil.h"
744 #include "jbsockets.h"
749 #include "urlmatch.h"
751 const char jcc_h_rcs[] = JCC_H_VERSION;
752 const char project_h_rcs[] = PROJECT_H_VERSION;
755 struct client_state clients[1];
756 struct file_list files[1];
758 #ifdef FEATURE_STATISTICS
759 int urls_read = 0; /* total nr of urls read inc rejected */
760 int urls_rejected = 0; /* total nr of urls rejected */
761 #endif /* def FEATURE_STATISTICS */
763 #ifdef FEATURE_GRACEFUL_TERMINATION
767 static void listen_loop(void);
768 static void chat(struct client_state *csp);
770 void serve(struct client_state *csp);
771 #else /* ifndef AMIGA */
772 static void serve(struct client_state *csp);
773 #endif /* def AMIGA */
776 static int32 server_thread(void *data);
777 #endif /* def __BEOS__ */
780 #define sleep(N) Sleep(((N) * 1000))
784 #define sleep(N) DosSleep(((N) * 100))
787 #if defined(OSX_DARWIN) || defined(__OpenBSD__)
790 * Hit OSX over the head with a hammer. Protect all *_r functions.
792 pthread_mutex_t gmtime_mutex;
793 pthread_mutex_t localtime_mutex;
794 #endif /* def OSX_DARWIN */
796 * Protect only the resolve functions for OpenBSD.
798 pthread_mutex_t gethostbyaddr_mutex;
799 pthread_mutex_t gethostbyname_mutex;
800 #endif /* defined(OSX_DARWIN) || defined(__OpenBSD__) */
802 #ifdef FEATURE_PTHREAD
803 pthread_mutex_t log_mutex;
804 pthread_mutex_t log_init_mutex;
805 #endif /* FEATURE_PTHREAD */
807 #if defined(unix) || defined(__EMX__)
808 const char *basedir = NULL;
809 const char *pidfile = NULL;
810 int received_hup_signal = 0;
811 #endif /* defined unix */
813 /* The vanilla wafer. */
814 static const char VANILLA_WAFER[] =
815 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
816 "Do_not_send_me_any_copyrighted_information_other_than_the_"
817 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
818 "In_particular_do_not_send_me_any_cookies_that_"
819 "are_subject_to_a_claim_of_copyright_by_anybody._"
820 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
821 "(copyright_or_otherwise)_applying_to_any_cookie._";
824 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
825 /*********************************************************************
827 * Function : sig_handler
829 * Description : Signal handler for different signals.
830 * Exit gracefully on ABRT, TERM and INT
831 * or set a flag that will cause the errlog
832 * to be reopened by the main thread on HUP.
835 * 1 : the_signal = the signal cause this function to call
839 *********************************************************************/
840 static void sig_handler(int the_signal)
847 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
855 received_hup_signal = 1;
860 * We shouldn't be here, unless we catch signals
861 * in main() that we can't handle here!
863 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
871 /*********************************************************************
875 * Description : Once a connection to the client has been accepted,
876 * this function is called (via serve()) to handle the
877 * main business of the communication. When this
878 * function returns, the caller must close the client
882 * 1 : csp = Current client state (buffers, headers, etc...)
884 * Returns : On success, the number of bytes written are returned (zero
885 * indicates nothing was written). On error, -1 is returned,
886 * and errno is set appropriately. If count is zero and the
887 * file descriptor refers to a regular file, 0 will be
888 * returned without causing any other effect. For a special
889 * file, the results are not portable.
891 *********************************************************************/
892 static void chat(struct client_state *csp)
895 * This next lines are a little ugly, but they simplifies the if statements
896 * below. Basically if TOGGLE, then we want the if to test if the
897 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
898 * then we want the if to test for CSP_FLAG_FORCED , else we don't
900 #ifdef FEATURE_TOGGLE
901 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
902 #else /* ifndef FEATURE_TOGGLE */
903 # define IS_TOGGLED_ON_AND
904 #endif /* ndef FEATURE_TOGGLE */
905 #ifdef FEATURE_FORCE_LOAD
906 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
907 #else /* ifndef FEATURE_FORCE_LOAD */
908 # define IS_NOT_FORCED_AND
909 #endif /* def FEATURE_FORCE_LOAD */
911 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
913 char buf[BUFFER_SIZE];
921 int ms_iis5_hack = 0;
923 unsigned int forwarded_connect_retries = 0;
924 unsigned int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
925 const struct forward_spec * fwd;
926 struct http_request *http;
927 int len; /* for buffer sizes */
928 #ifdef FEATURE_KILL_POPUPS
929 int block_popups; /* bool, 1==will block popups */
930 int block_popups_now = 0; /* bool, 1==currently blocking popups */
931 #endif /* def FEATURE_KILL_POPUPS */
933 int pcrs_filter; /* bool, 1==will filter through pcrs */
934 int gif_deanimate; /* bool, 1==will deanimate gifs */
935 int jpeg_inspect; /* bool, 1==will inspect jpegs */
937 /* Function that does the content filtering for the current request */
938 char *(*content_filter)() = NULL;
940 /* Skeleton for HTTP response, if we should intercept the request */
941 struct http_response *rsp;
946 * Read the client's request. Note that since we're not using select() we
947 * could get blocked here if a client connected, then didn't say anything!
952 len = read_socket(csp->cfd, buf, sizeof(buf));
954 if (len <= 0) break; /* error! */
957 * If there is no memory left for buffering the
958 * request, there is nothing we can do but hang up
960 if (add_to_iob(csp, buf, len))
965 req = get_header(csp);
969 break; /* no HTTP request! */
974 continue; /* more to come! */
977 #ifdef FEATURE_FORCE_LOAD
978 /* If this request contains the FORCE_PREFIX,
979 * better get rid of it now and set the force flag --oes
982 if (strstr(req, FORCE_PREFIX))
984 strclean(req, FORCE_PREFIX);
985 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
986 csp->flags |= CSP_FLAG_FORCED;
989 #endif /* def FEATURE_FORCE_LOAD */
991 parse_http_request(req, http, csp);
996 if (http->cmd == NULL)
998 strcpy(buf, CHEADER);
999 write_socket(csp->cfd, buf, strlen(buf));
1001 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
1003 free_http_request(http);
1007 if (!strncmpic(http->cmd, "GET ftp://", 10))
1009 strcpy(buf, FTP_RESPONSE);
1010 write_socket(csp->cfd, buf, strlen(buf));
1012 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as FTP proxy: %s",
1013 csp->ip_addr_str, http->cmd);
1015 free_http_request(http);
1019 /* decide how to route the HTTP request */
1021 if ((fwd = forward_url(http, csp)) == NULL)
1023 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1024 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1027 /* build the http request to send to the server
1028 * we have to do one of the following:
1030 * create = use the original HTTP request to create a new
1031 * HTTP request that has either the path component
1032 * without the http://domainspec (w/path) or the
1033 * full orininal URL (w/url)
1034 * Note that the path and/or the HTTP version may
1035 * have been altered by now.
1037 * connect = Open a socket to the host:port of the server
1038 * and short-circuit server and client socket.
1040 * pass = Pass the request unchanged if forwarding a CONNECT
1041 * request to a parent proxy. Note that we'll be sending
1042 * the CFAIL message ourselves if connecting to the parent
1043 * fails, but we won't send a CSUCCEED message if it works,
1044 * since that would result in a double message (ours and the
1045 * parent's). After sending the request to the parent, we simply
1048 * here's the matrix:
1051 * +--------+--------+
1053 * 0 | create | connect|
1055 * Forwarding +--------+--------+
1057 * 1 | create | pass |
1059 * +--------+--------+
1064 * Determine the actions for this URL
1066 #ifdef FEATURE_TOGGLE
1067 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1069 /* Most compatible set of actions (i.e. none) */
1070 init_current_action(csp->action);
1073 #endif /* ndef FEATURE_TOGGLE */
1075 url_actions(http, csp);
1080 * Check if a CONNECT request is allowable:
1081 * In the absence of a +limit-connect action, allow only port 443.
1082 * If there is an action, allow whatever matches the specificaton.
1086 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
1087 || (csp->action->flags & ACTION_LIMIT_CONNECT
1088 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
1090 if (csp->action->flags & ACTION_TREAT_FORBIDDEN_CONNECTS_LIKE_BLOCKS)
1092 /* The response will violate the specs, but makes unblocking easier. */
1093 log_error(LOG_LEVEL_ERROR, "Marking suspicious CONNECT request from %s for blocking.",
1095 csp->action->flags |= ACTION_BLOCK;
1100 strcpy(buf, CFORBIDDEN);
1101 write_socket(csp->cfd, buf, strlen(buf));
1102 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
1103 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
1111 * Downgrade http version from 1.1 to 1.0 if +downgrade
1114 if ( (http->ssl == 0)
1115 && (!strcmpic(http->ver, "HTTP/1.1"))
1116 && (csp->action->flags & ACTION_DOWNGRADE))
1119 http->ver = strdup("HTTP/1.0");
1121 if (http->ver == NULL)
1123 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1128 * Save a copy of the original request for logging
1130 http->ocmd = strdup(http->cmd);
1132 if (http->ocmd == NULL)
1134 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
1138 * (Re)build the HTTP request for non-SSL requests.
1139 * If forwarding, use the whole URL, else, use only the path.
1145 http->cmd = strdup(http->gpc);
1146 string_append(&http->cmd, " ");
1148 if (fwd->forward_host)
1150 string_append(&http->cmd, http->url);
1154 string_append(&http->cmd, http->path);
1156 string_append(&http->cmd, " ");
1157 string_append(&http->cmd, http->ver);
1159 if (http->cmd == NULL)
1161 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1163 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", http->cmd);
1165 enlist(csp->headers, http->cmd);
1169 * If the user has not supplied any wafers, and the user has not
1170 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1172 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1173 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1175 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1179 #ifdef FEATURE_KILL_POPUPS
1180 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
1181 #endif /* def FEATURE_KILL_POPUPS */
1183 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
1184 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
1186 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
1188 jpeg_inspect = ((csp->action->flags & ACTION_JPEG_INSPECT) != 0);
1190 /* grab the rest of the client's headers */
1194 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1196 len = read_socket(csp->cfd, buf, sizeof(buf));
1199 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1204 * If there is no memory left for buffering the
1205 * request, there is nothing we can do but hang up
1207 if (add_to_iob(csp, buf, len))
1214 if (p == NULL) break;
1216 enlist(csp->headers, p);
1221 * We have a request. Now, check to see if we need to
1222 * intercept it, i.e. If ..
1226 /* We may not forward the request by rfc2616 sect 14.31 */
1227 (NULL != (rsp = direct_response(csp)))
1229 /* or a CGI call was detected and answered */
1230 || (NULL != (rsp = dispatch_cgi(csp)))
1232 /* or we are enabled and... */
1233 || (IS_ENABLED_AND (
1235 /* ..the request was blocked */
1236 ( NULL != (rsp = block_url(csp)))
1238 /* ..or untrusted */
1239 #ifdef FEATURE_TRUST
1240 || ( NULL != (rsp = trust_url(csp)))
1241 #endif /* def FEATURE_TRUST */
1243 /* ..or a fast redirect kicked in */
1244 #ifdef FEATURE_FAST_REDIRECTS
1245 || ( NULL != (rsp = redirect_url(csp)))
1246 #endif /* def FEATURE_FAST_REDIRECTS */
1250 /* Write the answer to the client */
1251 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1252 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1254 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1257 #ifdef FEATURE_STATISTICS
1258 /* Count as a rejected request */
1259 csp->flags |= CSP_FLAG_REJECTED;
1260 #endif /* def FEATURE_STATISTICS */
1262 /* Log (FIXME: All intercept reasons appear as "crunch" with Status 200) */
1263 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
1264 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
1266 /* Clean up and return */
1267 free_http_response(rsp);
1271 hdr = sed(client_patterns, add_client_headers, csp);
1274 /* FIXME Should handle error properly */
1275 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1278 list_remove_all(csp->headers);
1280 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1282 if (fwd->forward_host)
1284 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1285 fwd->forward_host, fwd->forward_port, http->hostport);
1289 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1292 /* here we connect to the server, gateway, or the forwarder */
1294 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
1295 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
1297 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
1298 forwarded_connect_retries, http->hostport);
1301 if (csp->sfd == JB_INVALID_SOCKET)
1303 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1306 if (errno == EINVAL)
1308 rsp = error_response(csp, "no-such-domain", errno);
1310 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
1311 csp->ip_addr_str, http->ocmd);
1315 rsp = error_response(csp, "connect-failed", errno);
1317 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1318 csp->ip_addr_str, http->ocmd);
1322 /* Write the answer to the client */
1325 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1326 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1328 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1332 free_http_response(rsp);
1337 log_error(LOG_LEVEL_CONNECT, "OK");
1339 if (fwd->forward_host || (http->ssl == 0))
1341 /* write the client's (modified) header to the server
1342 * (along with anything else that may be in the buffer)
1345 if (write_socket(csp->sfd, hdr, strlen(hdr))
1346 || (flush_socket(csp->sfd, csp) < 0))
1348 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1351 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1352 csp->ip_addr_str, http->ocmd);
1354 rsp = error_response(csp, "connect-failed", errno);
1358 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1359 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1361 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1365 free_http_response(rsp);
1373 * We're running an SSL tunnel and we're not forwarding,
1374 * so just send the "connect succeeded" message to the
1375 * client, flush the rest, and get out of the way.
1377 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1378 csp->ip_addr_str, http->ocmd);
1380 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
1388 /* we're finished with the client's header */
1391 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1393 /* pass data between the client and server
1394 * until one or the other shuts down the connection.
1403 * FD_ZERO here seems to point to an errant macro which crashes.
1404 * So do this by hand for now...
1406 memset(&rfds,0x00,sizeof(fd_set));
1410 FD_SET(csp->cfd, &rfds);
1411 FD_SET(csp->sfd, &rfds);
1413 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
1417 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1421 /* this is the body of the browser's request
1422 * just read it and write it.
1425 if (FD_ISSET(csp->cfd, &rfds))
1427 len = read_socket(csp->cfd, buf, sizeof(buf));
1431 break; /* "game over, man" */
1434 if (write_socket(csp->sfd, buf, (size_t)len))
1436 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1443 * The server wants to talk. It could be the header or the body.
1444 * If `hdr' is null, then it's the header otherwise it's the body.
1445 * FIXME: Does `hdr' really mean `host'? No.
1449 if (FD_ISSET(csp->sfd, &rfds))
1452 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1456 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1458 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1459 csp->ip_addr_str, http->ocmd);
1461 rsp = error_response(csp, "connect-failed", errno);
1465 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1466 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1468 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1472 free_http_response(rsp);
1476 /* Add a trailing zero. This lets filter_popups
1477 * use string operations.
1481 #ifdef FEATURE_KILL_POPUPS
1482 /* Filter the popups on this read. */
1483 if (block_popups_now)
1485 filter_popups(buf, csp);
1487 #endif /* def FEATURE_KILL_POPUPS */
1489 /* Normally, this would indicate that we've read
1490 * as much as the server has sent us and we can
1491 * close the client connection. However, Microsoft
1492 * in its wisdom has released IIS/5 with a bug that
1493 * prevents it from sending the trailing \r\n in
1494 * a 302 redirect header (and possibly other headers).
1495 * To work around this if we've haven't parsed
1496 * a full header we'll append a trailing \r\n
1497 * and see if this now generates a valid one.
1499 * This hack shouldn't have any impacts. If we've
1500 * already transmitted the header or if this is a
1501 * SSL connection, then we won't bother with this
1502 * hack. So we only work on partially received
1503 * headers. If we append a \r\n and this still
1504 * doesn't generate a valid header, then we won't
1505 * transmit anything to the client.
1510 if (server_body || http->ssl)
1513 * If we have been buffering up the document,
1514 * now is the time to apply content modification
1515 * and send the result to the client.
1520 * If the content filter fails, use the original
1521 * buffer and length.
1522 * (see p != NULL ? p : csp->iob->cur below)
1524 if (NULL == (p = (*content_filter)(csp)))
1526 csp->content_length = csp->iob->eod - csp->iob->cur;
1529 hdr = sed(server_patterns_light, NULL, csp);
1533 /* FIXME Should handle error properly */
1534 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1537 if (write_socket(csp->cfd, hdr, strlen(hdr))
1538 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
1540 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1550 break; /* "game over, man" */
1554 * This is NOT the body, so
1555 * Let's pretend the server just sent us a blank line.
1557 len = sprintf(buf, "\r\n");
1560 * Now, let the normal header parsing algorithm below do its
1561 * job. If it fails, we'll exit instead of continuing.
1568 * If this is an SSL connection or we're in the body
1569 * of the server document, just write it to the client,
1570 * unless we need to buffer the body for later content-filtering
1573 if (server_body || http->ssl)
1578 * If there is no memory left for buffering the content, or the buffer limit
1579 * has been reached, switch to non-filtering mode, i.e. make & write the
1580 * header, flush the iob and buf, and get out of the way.
1582 if (add_to_iob(csp, buf, len))
1587 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
1589 hdr = sed(server_patterns, add_server_headers, csp);
1593 * Memory is too tight to even generate the header.
1594 * Send our static "Out-of-memory" page.
1596 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
1597 rsp = cgi_error_memory();
1599 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1600 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1602 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1607 hdrlen = strlen(hdr);
1609 if (write_socket(csp->cfd, hdr, hdrlen)
1610 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
1611 || (write_socket(csp->cfd, buf, (size_t) len)))
1613 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
1619 byte_count += hdrlen + flushed + len;
1621 content_filter = NULL;
1628 if (write_socket(csp->cfd, buf, (size_t)len))
1630 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
1639 /* we're still looking for the end of the
1640 * server's header ... (does that make header
1641 * parsing an "out of body experience" ?
1645 * buffer up the data we just read. If that fails,
1646 * there's little we can do but send our static
1647 * out-of-memory page.
1649 if (add_to_iob(csp, buf, len))
1651 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
1652 rsp = cgi_error_memory();
1654 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1655 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1657 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1662 /* get header lines from the iob */
1664 while ((p = get_header(csp)) != NULL)
1668 /* see following note */
1671 enlist(csp->headers, p);
1675 /* NOTE: there are no "empty" headers so
1676 * if the pointer `p' is not NULL we must
1677 * assume that we reached the end of the
1678 * buffer before we hit the end of the header.
1685 /* Well, we tried our MS IIS/5
1686 * hack and it didn't work.
1687 * The header is incomplete
1688 * and there isn't anything
1689 * we can do about it.
1695 /* Since we have to wait for
1696 * more from the server before
1697 * we can parse the headers
1698 * we just continue here.
1704 /* we have now received the entire header.
1705 * filter it and send the result to the client
1708 hdr = sed(server_patterns, add_server_headers, csp);
1711 /* FIXME Should handle error properly */
1712 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1715 #ifdef FEATURE_KILL_POPUPS
1716 /* Start blocking popups if appropriate. */
1718 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1719 !http->ssl && /* We talk plaintext */
1720 block_popups) /* Policy allows */
1722 block_popups_now = 1;
1724 * Filter the part of the body that came in the same read
1725 * as the last headers:
1727 filter_popups(csp->iob->cur, csp);
1730 #endif /* def FEATURE_KILL_POPUPS */
1732 /* Buffer and pcrs filter this if appropriate. */
1734 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1735 !http->ssl && /* We talk plaintext */
1736 pcrs_filter) /* Policy allows */
1738 content_filter = pcrs_filter_response;
1741 /* Buffer and gif_deanimate this if appropriate. */
1743 if ((csp->content_type & CT_GIF) && /* It's an image/gif MIME-Type */
1744 !http->ssl && /* We talk plaintext */
1745 gif_deanimate) /* Policy allows */
1747 content_filter = gif_deanimate_response;
1750 /* Buffer and jpg_inspect this if appropriate. */
1752 if ((csp->content_type & CT_JPEG) && /* It's an image/jpeg MIME-Type */
1753 !http->ssl && /* We talk plaintext */
1754 jpeg_inspect) /* Policy allows */
1756 content_filter = jpeg_inspect_response;
1760 * Only write if we're not buffering for content modification
1762 if (!content_filter)
1764 /* write the server's (modified) header to
1765 * the client (along with anything else that
1766 * may be in the buffer)
1769 if (write_socket(csp->cfd, hdr, strlen(hdr))
1770 || ((len = flush_socket(csp->cfd, csp)) < 0))
1772 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1774 /* the write failed, so don't bother
1775 * mentioning it to the client...
1776 * it probably can't hear us anyway.
1785 /* we're finished with the server's header */
1790 /* If this was a MS IIS/5 hack then it means
1791 * the server has already closed the
1792 * connection. Nothing more to read. Time
1803 return; /* huh? we should never get here */
1806 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
1807 csp->ip_addr_str, http->ocmd, byte_count);
1811 /*********************************************************************
1815 * Description : This is little more than chat. We only "serve" to
1816 * to close any socket that chat may have opened.
1819 * 1 : csp = Current client state (buffers, headers, etc...)
1823 *********************************************************************/
1825 void serve(struct client_state *csp)
1826 #else /* ifndef AMIGA */
1827 static void serve(struct client_state *csp)
1828 #endif /* def AMIGA */
1831 close_socket(csp->cfd);
1833 if (csp->sfd != JB_INVALID_SOCKET)
1835 close_socket(csp->sfd);
1838 csp->flags &= ~CSP_FLAG_ACTIVE;
1844 /*********************************************************************
1846 * Function : server_thread
1848 * Description : We only exist to call `serve' in a threaded environment.
1851 * 1 : data = Current client state (buffers, headers, etc...)
1853 * Returns : Always 0.
1855 *********************************************************************/
1856 static int32 server_thread(void *data)
1858 serve((struct client_state *) data);
1865 /*********************************************************************
1869 * Description : Print usage info & exit.
1871 * Parameters : Pointer to argv[0] for identifying ourselves
1875 *********************************************************************/
1876 void usage(const char *myname)
1878 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
1880 "Usage: %s [--help] [--version] [configfile]\n"
1882 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
1884 "Aborting.\n", myname);
1891 /*********************************************************************
1895 * Description : Load the config file and start the listen loop.
1896 * This function is a lot more *sane* with the `load_config'
1897 * and `listen_loop' functions; although it stills does
1898 * a *little* too much for my taste.
1901 * 1 : argc = Number of parameters (including $0).
1902 * 2 : argv = Array of (char *)'s to the parameters.
1904 * Returns : 1 if : can't open config file, unrecognized directive,
1905 * stats requested in multi-thread mode, can't open the
1906 * log file, can't open the jar file, listen port is invalid,
1907 * any load fails, and can't bind port.
1909 * Else main never returns, the process must be signaled
1910 * to terminate execution. Or, on Windows, use the
1911 * "File", "Exit" menu option.
1913 *********************************************************************/
1915 int real_main(int argc, const char *argv[])
1917 int main(int argc, const char *argv[])
1922 unsigned int random_seed;
1923 #endif /* ifdef HAVE_RANDOM */
1925 struct passwd *pw = NULL;
1926 struct group *grp = NULL;
1935 #if !defined(_WIN32)
1943 * Parse the command line arguments
1945 while (++argc_pos < argc)
1948 /* Check to see if the service must be installed or uninstalled */
1949 if (strncmp(argv[argc_pos], "--install", 9) == 0)
1951 const char *pName = argv[argc_pos] + 9;
1954 exit( (install_service(pName)) ? 0 : 1 );
1956 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
1958 const char *pName = argv[argc_pos] + 11;
1961 exit((uninstall_service(pName)) ? 0 : 1);
1963 else if (strcmp(argv[argc_pos], "--service" ) == 0)
1965 bRunAsService = TRUE;
1966 w32_set_service_cwd();
1967 atexit(w32_service_exit_notify);
1970 #endif /* defined(_WIN32) */
1973 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1975 if (strcmp(argv[argc_pos], "--help") == 0)
1980 else if(strcmp(argv[argc_pos], "--version") == 0)
1982 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
1988 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
1993 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
1995 if (++argc_pos == argc) usage(argv[0]);
1996 pidfile = strdup(argv[argc_pos]);
1999 else if (strcmp(argv[argc_pos], "--user" ) == 0)
2001 if (++argc_pos == argc) usage(argv[argc_pos]);
2003 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
2006 if (NULL == (grp = getgrnam(p)))
2008 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
2012 if (NULL == (pw = getpwnam(argv[argc_pos])))
2014 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
2017 if (p != NULL) *--p = '\0';
2020 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
2025 #endif /* defined(unix) */
2026 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
2028 configfile = argv[argc_pos];
2031 } /* -END- while (more arguments) */
2034 if ( *configfile != '/' )
2036 char *abs_file, cwd[1024];
2038 /* make config-filename absolute here */
2039 if ( !(getcwd(cwd, sizeof(cwd))))
2041 perror("get working dir failed");
2045 if (!(basedir = strdup(cwd))
2046 || (!(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))))
2048 perror("malloc failed");
2051 strcpy( abs_file, basedir );
2052 strcat( abs_file, "/" );
2053 strcat( abs_file, configfile );
2054 configfile = abs_file;
2056 #endif /* defined unix */
2060 clients->next = NULL;
2064 #elif defined(_WIN32)
2068 #if defined(OSX_DARWIN) || defined(__OpenBSD__)
2070 * Prepare global mutex semaphores
2073 pthread_mutex_init(&gmtime_mutex,0);
2074 pthread_mutex_init(&localtime_mutex,0);
2075 #endif /* def OSX_DARWIN */
2076 pthread_mutex_init(&gethostbyaddr_mutex,0);
2077 pthread_mutex_init(&gethostbyname_mutex,0);
2078 #endif /* defined(OSX_DARWIN) || defined(__OpenBSD__) */
2080 #ifdef FEATURE_PTHREAD
2081 pthread_mutex_init(&log_mutex,0);
2082 pthread_mutex_init(&log_init_mutex,0);
2083 #endif /* FEATURE_PTHREAD */
2086 random_seed = (unsigned int)time(NULL);
2087 srandom(random_seed);
2088 #endif /* ifdef HAVE_RANDOM */
2091 * Unix signal handling
2093 * Catch the abort, interrupt and terminate signals for a graceful exit
2094 * Catch the hangup signal so the errlog can be reopened.
2095 * Ignore the broken pipe signals (FIXME: Why?)
2097 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
2100 const int catched_signals[] = { SIGABRT, SIGTERM, SIGINT, SIGHUP, 0 };
2101 const int ignored_signals[] = { SIGPIPE, 0 };
2103 for (idx = 0; catched_signals[idx] != 0; idx++)
2105 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
2107 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
2111 for (idx = 0; ignored_signals[idx] != 0; idx++)
2113 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
2115 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
2120 #else /* ifdef _WIN32 */
2121 # ifdef _WIN_CONSOLE
2123 * We *are* in a windows console app.
2124 * Print a verbose messages about FAQ's and such
2126 printf(win32_blurb);
2127 # endif /* def _WIN_CONSOLE */
2128 #endif /* def _WIN32 */
2131 /* Initialize the CGI subsystem */
2132 cgi_init_error_messages();
2135 * If runnig on unix and without the --nodaemon
2136 * option, become a daemon. I.e. fork, detach
2137 * from tty and get process group leadership
2150 if ( pid < 0 ) /* error */
2155 else if ( pid != 0 ) /* parent */
2160 * must check for errors
2161 * child died due to missing files aso
2164 wpid = waitpid( pid, &status, WNOHANG );
2173 /* Should be more portable, but not as well tested */
2178 #else /* ndef __FreeBSD__ */
2180 #endif /* ndef __FreeBSD__ */
2181 fd = open("/dev/tty", O_RDONLY);
2184 /* no error check here */
2185 ioctl( fd, TIOCNOTTY,0 );
2189 /* FIXME: should close stderr (fd 2) here too, but the test
2191 * and load config file is done in listen_loop() and puts
2192 * some messages on stderr there.
2199 } /* -END- if (!no_daemon) */
2202 * As soon as we have written the PID file, we can switch
2203 * to the user and group ID indicated by the --user option
2209 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
2211 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
2217 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
2219 if (chroot(pw->pw_dir) < 0)
2221 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
2225 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
2228 if (setuid(pw->pw_uid))
2230 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
2234 char putenv_dummy[64];
2236 strcpy(putenv_dummy, "HOME=/");
2237 if (putenv(putenv_dummy) != 0)
2239 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
2242 snprintf(putenv_dummy, 64, "USER=%s", pw->pw_name);
2243 if (putenv(putenv_dummy) != 0)
2245 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
2251 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
2254 #endif /* defined unix */
2257 /* This will be FALSE unless the command line specified --service
2261 /* Yup, so now we must attempt to establish a connection
2262 * with the service dispatcher. This will only work if this
2263 * process was launched by the service control manager to
2264 * actually run as a service. If this isn't the case, i've
2265 * known it take around 30 seconds or so for the call to return.
2268 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
2269 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
2271 /* Service has run, and at this point is now being stopped, so just return */
2276 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
2278 /* An error occurred. Usually it's because --service was wrongly specified
2279 * and we were unable to connect to the Service Control Dispatcher because
2280 * it wasn't expecting us and is therefore not listening.
2282 * For now, just continue below to call the listen_loop function.
2285 #endif /* def _WIN32 */
2295 /*********************************************************************
2297 * Function : bind_port_helper
2299 * Description : Bind the listen port. Handles logging, and aborts
2303 * 1 : config = Privoxy configuration. Specifies port
2306 * Returns : Port that was opened.
2308 *********************************************************************/
2309 static jb_socket bind_port_helper(struct configuration_spec * config)
2314 if ( (config->haddr != NULL)
2315 && (config->haddr[0] == '1')
2316 && (config->haddr[1] == '2')
2317 && (config->haddr[2] == '7')
2318 && (config->haddr[3] == '.') )
2320 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
2323 else if (config->haddr == NULL)
2325 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
2330 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
2331 config->hport, config->haddr);
2334 result = bind_port(config->haddr, config->hport, &bfd);
2341 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2342 "There may be another Privoxy or some other "
2343 "proxy running on port %d",
2344 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
2345 config->hport, config->hport);
2348 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2349 "The hostname is not resolvable",
2350 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2353 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
2354 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2357 /* shouldn't get here */
2358 return JB_INVALID_SOCKET;
2361 config->need_bind = 0;
2368 /* Without this simple workaround we get this compiler warning from _beginthread
2369 * warning C4028: formal parameter 1 different from declaration
2371 void w32_service_listen_loop(void *p)
2375 #endif /* def _WIN32 */
2378 /*********************************************************************
2380 * Function : listen_loop
2382 * Description : bind the listen port and enter a "FOREVER" listening loop.
2388 *********************************************************************/
2389 static void listen_loop(void)
2391 struct client_state *csp = NULL;
2393 struct configuration_spec * config;
2395 config = load_config();
2397 bfd = bind_port_helper(config);
2399 #ifdef FEATURE_GRACEFUL_TERMINATION
2400 while (!g_terminate)
2405 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
2406 while (waitpid(-1, NULL, WNOHANG) > 0)
2408 /* zombie children */
2410 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
2413 * Free data that was used by died threads
2419 * Re-open the errlog after HUP signal
2421 if (received_hup_signal)
2423 init_error_log(Argv[0], config->logfile, config->debug);
2424 received_hup_signal = 0;
2429 #ifdef FEATURE_COOKIE_JAR
2431 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
2432 * already open. I think unload_configfile() is not being run, which should do
2433 * this work. Until that can get resolved, we'll use this workaround.
2437 if (csp->config->jar)
2439 fclose(csp->config->jar);
2440 csp->config->jar = NULL;
2442 #endif /* FEATURE_COOKIE_JAR */
2443 #endif /* __OS2__ */
2445 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
2447 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
2451 csp->flags |= CSP_FLAG_ACTIVE;
2452 csp->sfd = JB_INVALID_SOCKET;
2454 csp->config = config = load_config();
2456 if ( config->need_bind )
2459 * Since we were listening to the "old port", we will not see
2460 * a "listen" param change until the next IJB request. So, at
2461 * least 1 more request must be made for us to find the new
2462 * setting. I am simply closing the old socket and binding the
2465 * Which-ever is correct, we will serve 1 more page via the
2466 * old settings. This should probably be a "show-proxy-args"
2467 * request. This should not be a so common of an operation
2468 * that this will hurt people's feelings.
2473 bfd = bind_port_helper(config);
2476 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
2478 if (!accept_connection(csp, bfd))
2480 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
2493 log_error(LOG_LEVEL_CONNECT, "OK");
2496 #ifdef FEATURE_TOGGLE
2497 if (global_toggle_state)
2499 csp->flags |= CSP_FLAG_TOGGLED_ON;
2501 #endif /* def FEATURE_TOGGLE */
2503 if (run_loader(csp))
2505 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
2506 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2510 if (block_acl(NULL,csp))
2512 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
2513 close_socket(csp->cfd);
2517 #endif /* def FEATURE_ACL */
2519 /* add it to the list of clients */
2520 csp->next = clients->next;
2521 clients->next = csp;
2523 if (config->multi_threaded)
2527 /* this is a switch () statment in the C preprocessor - ugh */
2528 #undef SELECTED_ONE_OPTION
2530 /* Use Pthreads in preference to native code */
2531 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
2532 #define SELECTED_ONE_OPTION
2534 pthread_t the_thread;
2535 pthread_attr_t attrs;
2537 pthread_attr_init(&attrs);
2538 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
2539 errno = pthread_create(&the_thread, &attrs,
2541 child_id = errno ? -1 : 0;
2542 pthread_attr_destroy(&attrs);
2546 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
2547 #define SELECTED_ONE_OPTION
2548 child_id = _beginthread(
2549 (void (*)(void *))serve,
2554 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
2555 #define SELECTED_ONE_OPTION
2556 child_id = _beginthread(
2557 (void(* _Optlink)(void*))serve,
2563 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
2564 #define SELECTED_ONE_OPTION
2566 thread_id tid = spawn_thread
2567 (server_thread, "server", B_NORMAL_PRIORITY, csp);
2569 if ((tid >= 0) && (resume_thread(tid) == B_OK))
2571 child_id = (int) tid;
2580 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2581 #define SELECTED_ONE_OPTION
2582 csp->cfd = ReleaseSocket(csp->cfd, -1);
2584 if((child_id = (int)CreateNewProcTags(
2585 NP_Entry, (ULONG)server_thread,
2586 NP_Output, Output(),
2587 NP_CloseOutput, FALSE,
2588 NP_Name, (ULONG)"privoxy child",
2589 NP_StackSize, 200*1024,
2593 ((struct Task *)child_id)->tc_UserData = csp;
2594 Signal((struct Task *)child_id, SIGF_SINGLE);
2599 #if !defined(SELECTED_ONE_OPTION)
2602 /* This block is only needed when using fork().
2603 * When using threads, the server thread was
2604 * created and run by the call to _beginthread().
2606 if (child_id == 0) /* child */
2609 #ifdef FEATURE_TOGGLE
2610 int inherited_toggle_state = global_toggle_state;
2611 #endif /* def FEATURE_TOGGLE */
2616 * If we've been toggled or we've blocked the request, tell Mom
2619 #ifdef FEATURE_TOGGLE
2620 if (inherited_toggle_state != global_toggle_state)
2622 rc |= RC_FLAG_TOGGLED;
2624 #endif /* def FEATURE_TOGGLE */
2626 #ifdef FEATURE_STATISTICS
2627 if (csp->flags & CSP_FLAG_REJECTED)
2629 rc |= RC_FLAG_BLOCKED;
2631 #endif /* ndef FEATURE_STATISTICS */
2635 else if (child_id > 0) /* parent */
2637 /* in a fork()'d environment, the parent's
2638 * copy of the client socket and the CSP
2642 #if !defined(_WIN32) && !defined(__CYGWIN__)
2644 wait( &child_status );
2647 * Evaluate child's return code: If the child has
2648 * - been toggled, toggle ourselves
2649 * - blocked its request, bump up the stats counter
2652 #ifdef FEATURE_TOGGLE
2653 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
2655 global_toggle_state = !global_toggle_state;
2657 #endif /* def FEATURE_TOGGLE */
2659 #ifdef FEATURE_STATISTICS
2661 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
2665 #endif /* def FEATURE_STATISTICS */
2667 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
2668 close_socket(csp->cfd);
2669 csp->flags &= ~CSP_FLAG_ACTIVE;
2673 #undef SELECTED_ONE_OPTION
2674 /* end of cpp switch () */
2676 if (child_id < 0) /* failed */
2678 char buf[BUFFER_SIZE];
2680 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
2682 sprintf(buf , "Privoxy: can't fork: errno = %d", errno);
2684 write_socket(csp->cfd, buf, strlen(buf));
2685 close_socket(csp->cfd);
2686 csp->flags &= ~CSP_FLAG_ACTIVE;
2697 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
2699 /* Clean up. Aim: free all memory (no leaks) */
2700 #ifdef FEATURE_GRACEFUL_TERMINATION
2702 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
2704 unload_current_config_file();
2705 unload_current_actions_file();
2706 unload_current_re_filterfile();
2707 #ifdef FEATURE_TRUST
2708 unload_current_trust_file();
2711 if (config->multi_threaded)
2718 } while ((clients->next != NULL) && (--i > 0));
2722 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
2733 #ifdef FEATURE_COOKIE_JAR
2734 if (NULL != config->jar)
2736 fclose(config->jar);
2740 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
2741 /* Cleanup - remove taskbar icon etc. */
2746 #endif /* FEATURE_GRACEFUL_TERMINATION */