1 const char jcc_rcs[] = "$Id: jcc.c,v 1.100 2006/09/03 19:42:59 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 1.100 2006/09/03 19:42:59 fabiankeil
39 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
40 * Follow the OpenBSD port's lead and protect the resolve
41 * functions on OpenBSD as well.
43 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
44 * --user fix. Only use the user as group if no group is specified.
45 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
47 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
48 * Windows service (re-)integration
52 * --install[:service_name]
53 * --uninstall[:service_name]
56 * They work as follows:
57 * --install will create a service for you and then terminate.
58 * By default the service name will be "privoxy" (without the quotes).
59 * However you can run multiple services if you wish, just by adding
60 * a colon and then a name (no spaces).
62 * --uninstall follows the exact same rules a --install.
64 * --service is used when the program is executed by the service
65 * control manager, and in normal circumstances would never be
66 * used as a command line argument.
68 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
69 * Windows service integration
71 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
72 * Incorporate Fabian Keil's patch work:
\rhttp://www.fabiankeil.de/sourcecode/privoxy/
74 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
75 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
76 * with what was really the latest development (the v_3_0_branch branch)
78 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
79 * Thanks to Jindrich Makovicka for a race condition fix for the log
80 * file. The race condition remains for non-pthread implementations.
81 * Reference patch #1175720.
83 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
84 * Add the ability to check jpeg images for invalid
85 * lengths of comment blocks. Defensive strategy
86 * against the exploit:
87 * Microsoft Security Bulletin MS04-028
88 * Buffer Overrun in JPEG Processing (GDI+) Could
89 * Allow Code Execution (833987)
90 * Enabled with +inspect-jpegs in actions files.
92 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
93 * - Fixed usage info for non-unix platforms
94 * - Fixed small cmdline parsing bug
96 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
97 * Diagnostics: Now preserve the returncode of pthread_create
98 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
100 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
101 * No longer ignore SIGCHLD. Fixes bug #769381
103 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
104 * Close jarfile on graceful exit, remove stray line
106 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
107 * Cosmetics: Killed a warning, a typo and an allocation left at exit
109 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
110 * No longer rely on non-POSIX.1 extensions of getcwd().
113 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
114 * Replaced setenv() by posix-compliant putenv()
115 * Thanks to Neil McCalden (nmcc AT users.sf.net).
117 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
118 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
120 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
121 * Clean-up and extension of improvements for forked mode:
122 * - Child's return code now consists of flags RC_FLAG_*
123 * - Reporting toggle to parent now properly #ifdef'ed
124 * - Children now report blocking to parent. This enables
125 * statistics in forked mode
127 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
128 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
129 * Children now report having been toggled through _exit(17), parents
130 * watch for that code and toggle themselves if found.
132 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
133 * Wrapping all *_r functions (the non-_r versions of them) with
134 * mutex semaphores for OSX. Hopefully this will take care of all
135 * of those pesky crash reports.
137 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
138 * Fixed two mostly harmless mem leaks
140 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
141 * Fix: Head of global clients list now initialized to NULL
143 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
144 * Added basic support for OPTIONS and TRACE HTTP methods:
145 * - New interceptor direct_response() added in chat().
146 * - sed() moved to earlier in the process, so that the
147 * Host: header is evaluated before actions and forwarding
150 * Revision 1.92 2002/05/08 16:00:46 oes
151 * Chat's buffer handling:
152 * - Fixed bug with unchecked out-of-mem conditions
153 * while reading client request & server headers
154 * - No longer predict if the buffer limit will be exceeded
155 * in the next read -- check add_to_iob's new
156 * return code. If buffer couldn't be extended
157 * (policy or out-of-mem) while
158 * - reading from client: abort
159 * - reading server headers: send error page
160 * - buffering server body for filter: flush,
161 * and if that fails: send error page
163 * Revision 1.91 2002/04/08 20:35:58 swa
166 * Revision 1.90 2002/04/02 14:57:28 oes
167 * Made sending wafers independent of FEATURE_COOKIE_JAR
169 * Revision 1.89 2002/03/31 17:18:59 jongfoster
170 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
172 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
173 * More compiler warning message maintenance
175 * Revision 1.87 2002/03/26 22:29:54 swa
176 * we have a new homepage!
178 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
179 * Workaround for closing the jarfile before load_config() comes around again
181 * Revision 1.85 2002/03/24 15:23:33 jongfoster
184 * Revision 1.84 2002/03/24 13:25:43 swa
185 * name change related issues
187 * Revision 1.83 2002/03/16 23:54:06 jongfoster
188 * Adding graceful termination feature, to help look for memory leaks.
189 * If you enable this (which, by design, has to be done by hand
190 * editing config.h) and then go to http://i.j.b/die, then the program
191 * will exit cleanly after the *next* request. It should free all the
192 * memory that was used.
194 * Revision 1.82 2002/03/13 00:27:05 jongfoster
197 * Revision 1.81 2002/03/12 01:42:50 oes
198 * Introduced modular filters
200 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
201 * OS/2 port maintenance:
202 * - Fixed EMX build - it had decayed a little
203 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
204 * substituted a memset for now.
206 * Revision 1.79 2002/03/09 20:03:52 jongfoster
207 * - Making various functions return int rather than size_t.
208 * (Undoing a recent change). Since size_t is unsigned on
209 * Windows, functions like read_socket that return -1 on
210 * error cannot return a size_t.
212 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
213 * crashes, and also frequently caused JB to jump to 100%
214 * CPU and stay there. (Because it thought it had just
215 * read ((unsigned)-1) == 4Gb of data...)
217 * - The signature of write_socket has changed, it now simply
218 * returns success=0/failure=nonzero.
220 * - Trying to get rid of a few warnings --with-debug on
221 * Windows, I've introduced a new type "jb_socket". This is
222 * used for the socket file descriptors. On Windows, this
223 * is SOCKET (a typedef for unsigned). Everywhere else, it's
224 * an int. The error value can't be -1 any more, so it's
225 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
226 * Windows it maps to the #define INVALID_SOCKET.)
228 * - The signature of bind_port has changed.
230 * Revision 1.78 2002/03/08 21:35:04 oes
231 * Added optional group supplement to --user option. Will now use default group of user if no group given
233 * Revision 1.77 2002/03/07 03:52:06 oes
234 * - Fixed compiler warnings etc
235 * - Improved handling of failed DNS lookups
237 * Revision 1.76 2002/03/06 22:54:35 jongfoster
238 * Automated function-comment nitpicking.
240 * Revision 1.75 2002/03/06 10:02:19 oes
241 * Fixed stupid bug when --user was not given
243 * Revision 1.74 2002/03/06 00:49:31 jongfoster
244 * Fixing warning on Windows
245 * Making #ifdefs that refer to the same variable consistently
246 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
248 * Revision 1.73 2002/03/05 23:57:30 hal9
249 * Stray character 's' on line 1618 was breaking build.
251 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
252 * - Re-enable OS/2 building after new parms were added
253 * - Fix false out of memory report when resolving CGI templates when no IP
254 * address is available of failed attempt (a la no such domain)
256 * Revision 1.71 2002/03/05 18:13:56 oes
257 * Added --user option
259 * Revision 1.70 2002/03/05 04:52:42 oes
260 * Deleted non-errlog debugging code
262 * Revision 1.69 2002/03/04 23:50:00 jongfoster
263 * Splitting off bind_port() call into bind_port_helper(), with
266 * Revision 1.68 2002/03/04 20:17:32 oes
269 * Revision 1.67 2002/03/04 18:18:57 oes
270 * - Removed _DEBUG mode
271 * - Cleand up cmdline parsing
272 * - Introduced --no-daemon, --pidfile options
273 * - Cleaned up signal handling:
274 * - Terminate cleanly on INT, TERM and ABRT
275 * - Schedule logfile for re-opening on HUP
276 * - Ignore CHLD and PIPE
277 * - Leave the rest with their default handlers
278 * - Uniform handler registration
279 * - Added usage() function
280 * - Played styleguide police
282 * Revision 1.66 2002/03/03 15:06:55 oes
283 * Re-enabled automatic config reloading
285 * Revision 1.65 2002/03/03 14:49:11 oes
286 * Fixed CLF logging: Now uses client's original HTTP request
288 * Revision 1.64 2002/03/03 09:18:03 joergs
289 * Made jumbjuster work on AmigaOS again.
291 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
292 * Clean up a little CRLF unpleasantness that suddenly appeared
294 * Revision 1.62 2002/02/20 23:17:23 jongfoster
295 * Detecting some out-of memory conditions and exiting with a log message.
297 * Revision 1.61 2002/01/17 21:01:52 jongfoster
298 * Moving all our URL and URL pattern parsing code to urlmatch.c.
300 * Revision 1.60 2001/12/30 14:07:32 steudten
301 * - Add signal handling (unix)
302 * - Add SIGHUP handler (unix)
303 * - Add creation of pidfile (unix)
304 * - Add action 'top' in rc file (RH)
305 * - Add entry 'SIGNALS' to manpage
306 * - Add exit message to logfile (unix)
308 * Revision 1.59 2001/12/13 14:07:18 oes
309 * Fixed Bug: 503 error page now sent OK
311 * Revision 1.58 2001/11/30 23:37:24 jongfoster
312 * Renaming the Win32 config file to config.txt - this is almost the
313 * same as the corresponding UNIX name "config"
315 * Revision 1.57 2001/11/16 00:47:43 jongfoster
316 * Changing the tty-disconnection code to use setsid().
318 * Revision 1.56 2001/11/13 20:20:54 jongfoster
319 * Tabs->spaces, fixing a bug with missing {} around an if()
321 * Revision 1.55 2001/11/13 20:14:53 jongfoster
322 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
324 * Revision 1.54 2001/11/07 00:03:14 steudten
325 * Give reliable return value if an error
326 * occurs not just 0 with new daemon mode.
328 * Revision 1.53 2001/11/05 21:41:43 steudten
329 * Add changes to be a real daemon just for unix os.
330 * (change cwd to /, detach from controlling tty, set
331 * process group and session leader to the own process.
333 * Add some fatal-error log message for failed malloc().
334 * Add '-d' if compiled with 'configure --with-debug' to
335 * enable debug output.
337 * Revision 1.52 2001/10/26 20:11:20 jongfoster
338 * Fixing type mismatch
340 * Revision 1.51 2001/10/26 17:38:28 oes
343 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
344 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
345 * threads to call select() simultaneously. So, it's time to do a real, live,
346 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
347 * (native). Both versions will work, but using __OS2__ offers multi-threading.
349 * Revision 1.49 2001/10/23 21:41:35 jongfoster
350 * Added call to initialize the (statically-allocated of course)
351 * "out of memory" CGI response.
353 * Revision 1.48 2001/10/10 19:56:46 jongfoster
354 * Moving some code that wasn't cookie-related out of an #ifdef
357 * Revision 1.47 2001/10/10 16:44:36 oes
358 * Added CONNECT destination port limitation check
360 * Revision 1.46 2001/10/08 15:17:41 oes
361 * Re-enabled SSL forwarding
363 * Revision 1.45 2001/10/07 15:42:11 oes
364 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
366 * Moved downgrading of the HTTP version from parse_http_request to
367 * chat(), since we can't decide if it is necessary before we have
368 * determined the actions for the URL. The HTTP command is now
369 * *always* re-built so the repairs need no longer be special-cased.
371 * filter_popups now gets a csp pointer so it can raise the new
372 * CSP_FLAG_MODIFIED flag.
376 * Added configurable size limit for the IOB. If the IOB grows so
377 * large that the next read would exceed the limit, the header
378 * is generated, and the header & unfiltered buffer are flushed
379 * to the client. Chat then continues in non-buffering,
380 * non-filtering body mode.
382 * Revision 1.44 2001/10/02 18:13:57 oes
385 * Revision 1.43 2001/10/02 15:32:13 oes
386 * Moved generation of hdr
388 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
389 * Cleaning up 2 compiler warnings on OS/2.
391 * Revision 1.41 2001/09/16 17:05:14 jongfoster
392 * Removing unused #include showarg.h
394 * Revision 1.40 2001/09/16 15:41:45 jongfoster
395 * Fixing signed/unsigned comparison warning.
397 * Revision 1.39 2001/09/16 13:21:27 jongfoster
398 * Changes to use new list functions.
400 * Revision 1.38 2001/09/16 13:01:46 jongfoster
401 * Removing redundant function call that zeroed zalloc()'d memory.
403 * Revision 1.37 2001/09/10 11:12:24 oes
404 * Deleted unused variable
406 * Revision 1.36 2001/09/10 10:56:15 oes
407 * Silenced compiler warnings
409 * Revision 1.35 2001/07/31 14:44:22 oes
410 * Deleted unused size parameter from filter_popups()
412 * Revision 1.34 2001/07/30 22:08:36 jongfoster
413 * Tidying up #defines:
414 * - All feature #defines are now of the form FEATURE_xxx
415 * - Permanently turned off WIN_GUI_EDIT
416 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
418 * Revision 1.33 2001/07/29 19:32:00 jongfoster
419 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
421 * Revision 1.32 2001/07/29 18:47:05 jongfoster
422 * Adding missing #include "loadcfg.h"
424 * Revision 1.31 2001/07/29 12:17:48 oes
425 * Applied pthread fix by Paul Lieverse
427 * Revision 1.30 2001/07/25 22:57:13 jongfoster
428 * __BEOS__ no longer overrides FEATURE_PTHREAD.
429 * This is because FEATURE_PTHREAD will soon be widely used, so I
430 * want to keep it simple.
432 * Revision 1.29 2001/07/24 12:47:06 oes
433 * Applied BeOS support update by Eugenia
435 * Revision 1.28 2001/07/23 13:26:12 oes
436 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
438 * Revision 1.27 2001/07/19 19:09:47 haroon
439 * - Added code to take care of the situation where while processing the first
440 * server response (which includes the server header), after finding the end
441 * of the headers we were not looking past the end of the headers for
442 * content modification. I enabled it for filter_popups.
443 * Someone else should look to see if other similar operations should be
444 * done to the discarded portion of the buffer.
446 * Note 2001/07/20: No, the other content modification mechanisms will process
447 * the whole iob later anyway. --oes
449 * Revision 1.26 2001/07/18 12:31:36 oes
452 * Revision 1.25 2001/07/15 19:43:49 jongfoster
453 * Supports POSIX threads.
454 * Also removed some unused #includes.
456 * Revision 1.24 2001/07/13 14:00:40 oes
457 * - Generic content modification scheme:
458 * Each feature has its own applicability flag that is set
459 * from csp->action->flags.
460 * Replaced the "filtering" int flag , by a function pointer
461 * "content_filter" to the function that will do the content
462 * modification. If it is != NULL, the document will be buffered
463 * and processed through *content_filter, which must set
464 * csp->content_length and return a modified copy of the body
465 * or return NULL (on failiure).
466 * - Changed csp->is_text to the more generic bitmap csp->content_type
467 * which can currently take the valued CT_TEXT or CT_GIF
469 * - Removed all #ifdef PCRS
471 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
472 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
473 * the `block_acl' call. This prevents a compilation error when the user
474 * does not wish to use the "ACL" feature.
476 * Revision 1.22 2001/06/29 21:45:41 oes
477 * Indentation, CRLF->LF, Tab-> Space
479 * Revision 1.21 2001/06/29 13:29:36 oes
480 * - Cleaned up, improved comments
481 * - Unified all possible interceptors (CGI,
482 * block, trust, fast_redirect) in one
483 * place, with one (CGI) answer generation
484 * mechansim. Much clearer now.
485 * - Removed the GIF image generation, which
486 * is now done in filters.c:block_url()
487 * - Made error conditions like domain lookup
488 * failiure or (various) problems while talking
489 * to the server use cgi.c:error_response()
490 * instead of generating HTML/HTTP in chat() (yuck!)
491 * - Removed logentry from cancelled commit
493 * Revision 1.20 2001/06/09 10:55:28 jongfoster
494 * Changing BUFSIZ ==> BUFFER_SIZE
496 * Revision 1.19 2001/06/07 23:12:52 jongfoster
497 * Replacing function pointer in struct gateway with a directly
498 * called function forwarded_connect().
499 * Replacing struct gateway with struct forward_spec
501 * Revision 1.18 2001/06/03 19:12:16 oes
502 * introduced new cgi handling
504 * Revision 1.17 2001/06/01 20:07:23 jongfoster
505 * Now uses action +image-blocker{} rather than config->tinygif
507 * Revision 1.16 2001/06/01 18:49:17 jongfoster
508 * Replaced "list_share" with "list" - the tiny memory gain was not
509 * worth the extra complexity.
511 * Revision 1.15 2001/05/31 21:24:47 jongfoster
512 * Changed "permission" to "action" throughout.
513 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
514 * Moved vanilla wafer check into chat(), since we must now
515 * decide whether or not to add it based on the URL.
517 * Revision 1.14 2001/05/29 20:14:01 joergs
518 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
521 * Revision 1.13 2001/05/29 09:50:24 jongfoster
522 * Unified blocklist/imagelist/permissionslist.
523 * File format is still under discussion, but the internal changes
526 * Also modified interceptor behaviour:
527 * - We now intercept all URLs beginning with one of the following
528 * prefixes (and *only* these prefixes):
530 * * http://ijbswa.sf.net/config/
531 * * http://ijbswa.sourceforge.net/config/
532 * - New interceptors "home page" - go to http://i.j.b/ to see it.
533 * - Internal changes so that intercepted and fast redirect pages
534 * are not replaced with an image.
535 * - Interceptors now have the option to send a binary page direct
536 * to the client. (i.e. ijb-send-banner uses this)
537 * - Implemented show-url-info interceptor. (Which is why I needed
538 * the above interceptors changes - a typical URL is
539 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
540 * The previous mechanism would not have intercepted that, and
541 * if it had been intercepted then it then it would have replaced
544 * Revision 1.12 2001/05/27 22:17:04 oes
546 * - re_process_buffer no longer writes the modified buffer
547 * to the client, which was very ugly. It now returns the
548 * buffer, which it is then written by chat.
550 * - content_length now adjusts the Content-Length: header
551 * for modified documents rather than crunch()ing it.
552 * (Length info in csp->content_length, which is 0 for
553 * unmodified documents)
555 * - For this to work, sed() is called twice when filtering.
557 * Revision 1.11 2001/05/26 17:27:53 jongfoster
558 * Added support for CLF and fixed LOG_LEVEL_LOG.
559 * Also did CRLF->LF fix of my previous patch.
561 * Revision 1.10 2001/05/26 15:26:15 jongfoster
562 * ACL feature now provides more security by immediately dropping
563 * connections from untrusted hosts.
565 * Revision 1.9 2001/05/26 00:28:36 jongfoster
566 * Automatic reloading of config file.
567 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
568 * Most of the global variables have been moved to a new
569 * struct configuration_spec, accessed through csp->config->globalname
570 * Most of the globals remaining are used by the Win32 GUI.
572 * Revision 1.8 2001/05/25 22:43:18 jongfoster
573 * Fixing minor memory leak and buffer overflow.
575 * Revision 1.7 2001/05/25 22:34:30 jongfoster
578 * Revision 1.6 2001/05/23 00:13:58 joergs
579 * AmigaOS support fixed.
581 * Revision 1.5 2001/05/22 18:46:04 oes
583 * - Enabled filtering banners by size rather than URL
584 * by adding patterns that replace all standard banner
585 * sizes with the "Junkbuster" gif to the re_filterfile
587 * - Enabled filtering WebBugs by providing a pattern
588 * which kills all 1x1 images
590 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
591 * which is selected by the (nonstandard and therefore
592 * capital) letter 'U' in the option string.
593 * It causes the quantifiers to be ungreedy by default.
594 * Appending a ? turns back to greedy (!).
596 * - Added a new interceptor ijb-send-banner, which
597 * sends back the "Junkbuster" gif. Without imagelist or
598 * MSIE detection support, or if tinygif = 1, or the
599 * URL isn't recognized as an imageurl, a lame HTML
600 * explanation is sent instead.
602 * - Added new feature, which permits blocking remote
603 * script redirects and firing back a local redirect
605 * The feature is conditionally compiled, i.e. it
606 * can be disabled with --disable-fast-redirects,
607 * plus it must be activated by a "fast-redirects"
608 * line in the config file, has its own log level
609 * and of course wants to be displayed by show-proxy-args
610 * Note: Boy, all the #ifdefs in 1001 locations and
611 * all the fumbling with configure.in and acconfig.h
612 * were *way* more work than the feature itself :-(
614 * - Because a generic redirect template was needed for
615 * this, tinygif = 3 now uses the same.
617 * - Moved GIFs, and other static HTTP response templates
622 * - Removed some >400 CRs again (Jon, you really worked
625 * Revision 1.4 2001/05/21 19:34:01 jongfoster
626 * Made failure to bind() a fatal error.
628 * Revision 1.3 2001/05/20 01:21:20 jongfoster
629 * Version 2.9.4 checkin.
630 * - Merged popupfile and cookiefile, and added control over PCRS
631 * filtering, in new "permissionsfile".
632 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
633 * file error you now get a message box (in the Win32 GUI) rather
634 * than the program exiting with no explanation.
635 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
637 * - Removed tabs from "config"
638 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
639 * - Bumped up version number.
641 * Revision 1.2 2001/05/17 22:34:44 oes
642 * - Added hint on GIF char array generation to jcc.c
643 * - Cleaned CRLF's from the sources and related files
644 * - Repaired logging for REF and FRC
646 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
647 * Initial import of version 2.9.3 source tree
650 *********************************************************************/
656 #include <sys/types.h>
663 #ifdef FEATURE_PTHREAD
665 #endif /* def FEATURE_PTHREAD */
668 # ifndef FEATURE_PTHREAD
672 # include <windows.h>
673 # include <process.h>
674 # endif /* ndef FEATURE_PTHREAD */
677 # ifndef _WIN_CONSOLE
679 # endif /* ndef _WIN_CONSOLE */
680 # include "w32svrapi.h"
682 #else /* ifndef _WIN32 */
684 # if !defined (__OS2__)
686 # include <sys/wait.h>
687 # endif /* ndef __OS2__ */
688 # include <sys/time.h>
689 # include <sys/stat.h>
690 # include <sys/ioctl.h>
693 #include <sys/termios.h>
704 # include <socket.h> /* BeOS has select() for sockets only. */
705 # include <OS.h> /* declarations for threads and stuff. */
708 # if defined(__EMX__) || defined(__OS2__)
709 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
714 #define bzero(B,N) memset(B,0x00,n)
729 #include "killpopup.h"
730 #include "miscutil.h"
732 #include "jbsockets.h"
737 #include "urlmatch.h"
739 const char jcc_h_rcs[] = JCC_H_VERSION;
740 const char project_h_rcs[] = PROJECT_H_VERSION;
743 struct client_state clients[1];
744 struct file_list files[1];
746 #ifdef FEATURE_STATISTICS
747 int urls_read = 0; /* total nr of urls read inc rejected */
748 int urls_rejected = 0; /* total nr of urls rejected */
749 #endif /* def FEATURE_STATISTICS */
751 #ifdef FEATURE_GRACEFUL_TERMINATION
755 static void listen_loop(void);
756 static void chat(struct client_state *csp);
758 void serve(struct client_state *csp);
759 #else /* ifndef AMIGA */
760 static void serve(struct client_state *csp);
761 #endif /* def AMIGA */
764 static int32 server_thread(void *data);
765 #endif /* def __BEOS__ */
768 #define sleep(N) Sleep(((N) * 1000))
772 #define sleep(N) DosSleep(((N) * 100))
775 #if defined(OSX_DARWIN) || defined(__OpenBSD__)
778 * Hit OSX over the head with a hammer. Protect all *_r functions.
780 pthread_mutex_t gmtime_mutex;
781 pthread_mutex_t localtime_mutex;
782 #endif /* def OSX_DARWIN */
784 * Protect only the resolve functions for OpenBSD.
786 pthread_mutex_t gethostbyaddr_mutex;
787 pthread_mutex_t gethostbyname_mutex;
788 #endif /* defined(OSX_DARWIN) || defined(__OpenBSD__) */
790 #ifdef FEATURE_PTHREAD
791 pthread_mutex_t log_mutex;
792 pthread_mutex_t log_init_mutex;
793 #endif /* FEATURE_PTHREAD */
795 #if defined(unix) || defined(__EMX__)
796 const char *basedir = NULL;
797 const char *pidfile = NULL;
798 int received_hup_signal = 0;
799 #endif /* defined unix */
801 /* The vanilla wafer. */
802 static const char VANILLA_WAFER[] =
803 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
804 "Do_not_send_me_any_copyrighted_information_other_than_the_"
805 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
806 "In_particular_do_not_send_me_any_cookies_that_"
807 "are_subject_to_a_claim_of_copyright_by_anybody._"
808 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
809 "(copyright_or_otherwise)_applying_to_any_cookie._";
812 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
813 /*********************************************************************
815 * Function : sig_handler
817 * Description : Signal handler for different signals.
818 * Exit gracefully on ABRT, TERM and INT
819 * or set a flag that will cause the errlog
820 * to be reopened by the main thread on HUP.
823 * 1 : the_signal = the signal cause this function to call
827 *********************************************************************/
828 static void sig_handler(int the_signal)
835 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
843 received_hup_signal = 1;
848 * We shouldn't be here, unless we catch signals
849 * in main() that we can't handle here!
851 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
859 /*********************************************************************
863 * Description : Once a connection to the client has been accepted,
864 * this function is called (via serve()) to handle the
865 * main business of the communication. When this
866 * function returns, the caller must close the client
870 * 1 : csp = Current client state (buffers, headers, etc...)
872 * Returns : On success, the number of bytes written are returned (zero
873 * indicates nothing was written). On error, -1 is returned,
874 * and errno is set appropriately. If count is zero and the
875 * file descriptor refers to a regular file, 0 will be
876 * returned without causing any other effect. For a special
877 * file, the results are not portable.
879 *********************************************************************/
880 static void chat(struct client_state *csp)
883 * This next lines are a little ugly, but they simplifies the if statements
884 * below. Basically if TOGGLE, then we want the if to test if the
885 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
886 * then we want the if to test for CSP_FLAG_FORCED , else we don't
888 #ifdef FEATURE_TOGGLE
889 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
890 #else /* ifndef FEATURE_TOGGLE */
891 # define IS_TOGGLED_ON_AND
892 #endif /* ndef FEATURE_TOGGLE */
893 #ifdef FEATURE_FORCE_LOAD
894 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
895 #else /* ifndef FEATURE_FORCE_LOAD */
896 # define IS_NOT_FORCED_AND
897 #endif /* def FEATURE_FORCE_LOAD */
899 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
901 char buf[BUFFER_SIZE];
909 int ms_iis5_hack = 0;
911 unsigned int forwarded_connect_retries = 0;
912 unsigned int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
913 const struct forward_spec * fwd;
914 struct http_request *http;
915 int len; /* for buffer sizes */
916 #ifdef FEATURE_KILL_POPUPS
917 int block_popups; /* bool, 1==will block popups */
918 int block_popups_now = 0; /* bool, 1==currently blocking popups */
919 #endif /* def FEATURE_KILL_POPUPS */
921 int pcrs_filter; /* bool, 1==will filter through pcrs */
922 int gif_deanimate; /* bool, 1==will deanimate gifs */
923 int jpeg_inspect; /* bool, 1==will inspect jpegs */
925 /* Function that does the content filtering for the current request */
926 char *(*content_filter)() = NULL;
928 /* Skeleton for HTTP response, if we should intercept the request */
929 struct http_response *rsp;
934 * Read the client's request. Note that since we're not using select() we
935 * could get blocked here if a client connected, then didn't say anything!
940 len = read_socket(csp->cfd, buf, sizeof(buf));
942 if (len <= 0) break; /* error! */
945 * If there is no memory left for buffering the
946 * request, there is nothing we can do but hang up
948 if (add_to_iob(csp, buf, len))
953 req = get_header(csp);
957 break; /* no HTTP request! */
962 continue; /* more to come! */
965 #ifdef FEATURE_FORCE_LOAD
966 /* If this request contains the FORCE_PREFIX,
967 * better get rid of it now and set the force flag --oes
970 if (strstr(req, FORCE_PREFIX))
972 strclean(req, FORCE_PREFIX);
973 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
974 csp->flags |= CSP_FLAG_FORCED;
977 #endif /* def FEATURE_FORCE_LOAD */
979 parse_http_request(req, http, csp);
984 if (http->cmd == NULL)
986 strcpy(buf, CHEADER);
987 write_socket(csp->cfd, buf, strlen(buf));
989 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
991 free_http_request(http);
995 /* decide how to route the HTTP request */
997 if ((fwd = forward_url(http, csp)) == NULL)
999 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1000 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1003 /* build the http request to send to the server
1004 * we have to do one of the following:
1006 * create = use the original HTTP request to create a new
1007 * HTTP request that has either the path component
1008 * without the http://domainspec (w/path) or the
1009 * full orininal URL (w/url)
1010 * Note that the path and/or the HTTP version may
1011 * have been altered by now.
1013 * connect = Open a socket to the host:port of the server
1014 * and short-circuit server and client socket.
1016 * pass = Pass the request unchanged if forwarding a CONNECT
1017 * request to a parent proxy. Note that we'll be sending
1018 * the CFAIL message ourselves if connecting to the parent
1019 * fails, but we won't send a CSUCCEED message if it works,
1020 * since that would result in a double message (ours and the
1021 * parent's). After sending the request to the parent, we simply
1024 * here's the matrix:
1027 * +--------+--------+
1029 * 0 | create | connect|
1031 * Forwarding +--------+--------+
1033 * 1 | create | pass |
1035 * +--------+--------+
1040 * Determine the actions for this URL
1042 #ifdef FEATURE_TOGGLE
1043 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1045 /* Most compatible set of actions (i.e. none) */
1046 init_current_action(csp->action);
1049 #endif /* ndef FEATURE_TOGGLE */
1051 url_actions(http, csp);
1056 * Check if a CONNECT request is allowable:
1057 * In the absence of a +limit-connect action, allow only port 443.
1058 * If there is an action, allow whatever matches the specificaton.
1062 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
1063 || (csp->action->flags & ACTION_LIMIT_CONNECT
1064 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
1066 if (csp->action->flags & ACTION_TREAT_FORBIDDEN_CONNECTS_LIKE_BLOCKS)
1068 /* The response will violate the specs, but makes unblocking easier. */
1069 log_error(LOG_LEVEL_ERROR, "Marking suspicious CONNECT request from %s for blocking.",
1071 csp->action->flags |= ACTION_BLOCK;
1076 strcpy(buf, CFORBIDDEN);
1077 write_socket(csp->cfd, buf, strlen(buf));
1078 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
1079 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
1087 * Downgrade http version from 1.1 to 1.0 if +downgrade
1090 if ( (http->ssl == 0)
1091 && (!strcmpic(http->ver, "HTTP/1.1"))
1092 && (csp->action->flags & ACTION_DOWNGRADE))
1095 http->ver = strdup("HTTP/1.0");
1097 if (http->ver == NULL)
1099 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1104 * Save a copy of the original request for logging
1106 http->ocmd = strdup(http->cmd);
1108 if (http->ocmd == NULL)
1110 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
1114 * (Re)build the HTTP request for non-SSL requests.
1115 * If forwarding, use the whole URL, else, use only the path.
1121 http->cmd = strdup(http->gpc);
1122 string_append(&http->cmd, " ");
1124 if (fwd->forward_host)
1126 string_append(&http->cmd, http->url);
1130 string_append(&http->cmd, http->path);
1132 string_append(&http->cmd, " ");
1133 string_append(&http->cmd, http->ver);
1135 if (http->cmd == NULL)
1137 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1139 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", http->cmd);
1141 enlist(csp->headers, http->cmd);
1145 * If the user has not supplied any wafers, and the user has not
1146 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1148 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1149 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1151 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1155 #ifdef FEATURE_KILL_POPUPS
1156 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
1157 #endif /* def FEATURE_KILL_POPUPS */
1159 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
1160 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
1162 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
1164 jpeg_inspect = ((csp->action->flags & ACTION_JPEG_INSPECT) != 0);
1166 /* grab the rest of the client's headers */
1170 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1172 len = read_socket(csp->cfd, buf, sizeof(buf));
1175 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1180 * If there is no memory left for buffering the
1181 * request, there is nothing we can do but hang up
1183 if (add_to_iob(csp, buf, len))
1190 if (p == NULL) break;
1192 enlist(csp->headers, p);
1197 * We have a request. Now, check to see if we need to
1198 * intercept it, i.e. If ..
1202 /* We may not forward the request by rfc2616 sect 14.31 */
1203 (NULL != (rsp = direct_response(csp)))
1205 /* or a CGI call was detected and answered */
1206 || (NULL != (rsp = dispatch_cgi(csp)))
1208 /* or we are enabled and... */
1209 || (IS_ENABLED_AND (
1211 /* ..the request was blocked */
1212 ( NULL != (rsp = block_url(csp)))
1214 /* ..or untrusted */
1215 #ifdef FEATURE_TRUST
1216 || ( NULL != (rsp = trust_url(csp)))
1217 #endif /* def FEATURE_TRUST */
1219 /* ..or a fast redirect kicked in */
1220 #ifdef FEATURE_FAST_REDIRECTS
1221 || (((csp->action->flags & ACTION_FAST_REDIRECTS) != 0) &&
1222 (NULL != (rsp = redirect_url(csp))))
1223 #endif /* def FEATURE_FAST_REDIRECTS */
1227 /* Write the answer to the client */
1228 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1229 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1231 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1234 #ifdef FEATURE_STATISTICS
1235 /* Count as a rejected request */
1236 csp->flags |= CSP_FLAG_REJECTED;
1237 #endif /* def FEATURE_STATISTICS */
1239 /* Log (FIXME: All intercept reasons appear as "crunch" with Status 200) */
1240 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
1241 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
1243 /* Clean up and return */
1244 free_http_response(rsp);
1248 hdr = sed(client_patterns, add_client_headers, csp);
1251 /* FIXME Should handle error properly */
1252 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1255 list_remove_all(csp->headers);
1257 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1259 if (fwd->forward_host)
1261 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1262 fwd->forward_host, fwd->forward_port, http->hostport);
1266 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1269 /* here we connect to the server, gateway, or the forwarder */
1271 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
1272 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
1274 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
1275 forwarded_connect_retries, http->hostport);
1278 if (csp->sfd == JB_INVALID_SOCKET)
1280 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1283 if (errno == EINVAL)
1285 rsp = error_response(csp, "no-such-domain", errno);
1287 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
1288 csp->ip_addr_str, http->ocmd);
1292 rsp = error_response(csp, "connect-failed", errno);
1294 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1295 csp->ip_addr_str, http->ocmd);
1299 /* Write the answer to the client */
1302 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1303 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1305 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1309 free_http_response(rsp);
1314 log_error(LOG_LEVEL_CONNECT, "OK");
1316 if (fwd->forward_host || (http->ssl == 0))
1318 /* write the client's (modified) header to the server
1319 * (along with anything else that may be in the buffer)
1322 if (write_socket(csp->sfd, hdr, strlen(hdr))
1323 || (flush_socket(csp->sfd, csp) < 0))
1325 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1328 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1329 csp->ip_addr_str, http->ocmd);
1331 rsp = error_response(csp, "connect-failed", errno);
1335 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1336 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1338 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1342 free_http_response(rsp);
1350 * We're running an SSL tunnel and we're not forwarding,
1351 * so just send the "connect succeeded" message to the
1352 * client, flush the rest, and get out of the way.
1354 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1355 csp->ip_addr_str, http->ocmd);
1357 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
1365 /* we're finished with the client's header */
1368 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1370 /* pass data between the client and server
1371 * until one or the other shuts down the connection.
1380 * FD_ZERO here seems to point to an errant macro which crashes.
1381 * So do this by hand for now...
1383 memset(&rfds,0x00,sizeof(fd_set));
1387 FD_SET(csp->cfd, &rfds);
1388 FD_SET(csp->sfd, &rfds);
1390 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
1394 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1398 /* this is the body of the browser's request
1399 * just read it and write it.
1402 if (FD_ISSET(csp->cfd, &rfds))
1404 len = read_socket(csp->cfd, buf, sizeof(buf));
1408 break; /* "game over, man" */
1411 if (write_socket(csp->sfd, buf, (size_t)len))
1413 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1420 * The server wants to talk. It could be the header or the body.
1421 * If `hdr' is null, then it's the header otherwise it's the body.
1422 * FIXME: Does `hdr' really mean `host'? No.
1426 if (FD_ISSET(csp->sfd, &rfds))
1429 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1433 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1435 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1436 csp->ip_addr_str, http->ocmd);
1438 rsp = error_response(csp, "connect-failed", errno);
1442 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1443 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1445 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1449 free_http_response(rsp);
1453 /* Add a trailing zero. This lets filter_popups
1454 * use string operations.
1458 #ifdef FEATURE_KILL_POPUPS
1459 /* Filter the popups on this read. */
1460 if (block_popups_now)
1462 filter_popups(buf, csp);
1464 #endif /* def FEATURE_KILL_POPUPS */
1466 /* Normally, this would indicate that we've read
1467 * as much as the server has sent us and we can
1468 * close the client connection. However, Microsoft
1469 * in its wisdom has released IIS/5 with a bug that
1470 * prevents it from sending the trailing \r\n in
1471 * a 302 redirect header (and possibly other headers).
1472 * To work around this if we've haven't parsed
1473 * a full header we'll append a trailing \r\n
1474 * and see if this now generates a valid one.
1476 * This hack shouldn't have any impacts. If we've
1477 * already transmitted the header or if this is a
1478 * SSL connection, then we won't bother with this
1479 * hack. So we only work on partially received
1480 * headers. If we append a \r\n and this still
1481 * doesn't generate a valid header, then we won't
1482 * transmit anything to the client.
1487 if (server_body || http->ssl)
1490 * If we have been buffering up the document,
1491 * now is the time to apply content modification
1492 * and send the result to the client.
1497 * If the content filter fails, use the original
1498 * buffer and length.
1499 * (see p != NULL ? p : csp->iob->cur below)
1501 if (NULL == (p = (*content_filter)(csp)))
1503 csp->content_length = csp->iob->eod - csp->iob->cur;
1506 hdr = sed(server_patterns_light, NULL, csp);
1510 /* FIXME Should handle error properly */
1511 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1514 if (write_socket(csp->cfd, hdr, strlen(hdr))
1515 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
1517 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1527 break; /* "game over, man" */
1531 * This is NOT the body, so
1532 * Let's pretend the server just sent us a blank line.
1534 len = sprintf(buf, "\r\n");
1537 * Now, let the normal header parsing algorithm below do its
1538 * job. If it fails, we'll exit instead of continuing.
1545 * If this is an SSL connection or we're in the body
1546 * of the server document, just write it to the client,
1547 * unless we need to buffer the body for later content-filtering
1550 if (server_body || http->ssl)
1555 * If there is no memory left for buffering the content, or the buffer limit
1556 * has been reached, switch to non-filtering mode, i.e. make & write the
1557 * header, flush the iob and buf, and get out of the way.
1559 if (add_to_iob(csp, buf, len))
1564 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
1566 hdr = sed(server_patterns, add_server_headers, csp);
1570 * Memory is too tight to even generate the header.
1571 * Send our static "Out-of-memory" page.
1573 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
1574 rsp = cgi_error_memory();
1576 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1577 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1579 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1584 hdrlen = strlen(hdr);
1586 if (write_socket(csp->cfd, hdr, hdrlen)
1587 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
1588 || (write_socket(csp->cfd, buf, (size_t) len)))
1590 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
1596 byte_count += hdrlen + flushed + len;
1598 content_filter = NULL;
1605 if (write_socket(csp->cfd, buf, (size_t)len))
1607 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
1616 /* we're still looking for the end of the
1617 * server's header ... (does that make header
1618 * parsing an "out of body experience" ?
1622 * buffer up the data we just read. If that fails,
1623 * there's little we can do but send our static
1624 * out-of-memory page.
1626 if (add_to_iob(csp, buf, len))
1628 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
1629 rsp = cgi_error_memory();
1631 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1632 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1634 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1639 /* get header lines from the iob */
1641 while ((p = get_header(csp)) != NULL)
1645 /* see following note */
1648 enlist(csp->headers, p);
1652 /* NOTE: there are no "empty" headers so
1653 * if the pointer `p' is not NULL we must
1654 * assume that we reached the end of the
1655 * buffer before we hit the end of the header.
1662 /* Well, we tried our MS IIS/5
1663 * hack and it didn't work.
1664 * The header is incomplete
1665 * and there isn't anything
1666 * we can do about it.
1672 /* Since we have to wait for
1673 * more from the server before
1674 * we can parse the headers
1675 * we just continue here.
1681 /* we have now received the entire header.
1682 * filter it and send the result to the client
1685 hdr = sed(server_patterns, add_server_headers, csp);
1688 /* FIXME Should handle error properly */
1689 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1692 #ifdef FEATURE_KILL_POPUPS
1693 /* Start blocking popups if appropriate. */
1695 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1696 !http->ssl && /* We talk plaintext */
1697 block_popups) /* Policy allows */
1699 block_popups_now = 1;
1701 * Filter the part of the body that came in the same read
1702 * as the last headers:
1704 filter_popups(csp->iob->cur, csp);
1707 #endif /* def FEATURE_KILL_POPUPS */
1709 /* Buffer and pcrs filter this if appropriate. */
1711 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1712 !http->ssl && /* We talk plaintext */
1713 pcrs_filter) /* Policy allows */
1715 content_filter = pcrs_filter_response;
1718 /* Buffer and gif_deanimate this if appropriate. */
1720 if ((csp->content_type & CT_GIF) && /* It's an image/gif MIME-Type */
1721 !http->ssl && /* We talk plaintext */
1722 gif_deanimate) /* Policy allows */
1724 content_filter = gif_deanimate_response;
1727 /* Buffer and jpg_inspect this if appropriate. */
1729 if ((csp->content_type & CT_JPEG) && /* It's an image/jpeg MIME-Type */
1730 !http->ssl && /* We talk plaintext */
1731 jpeg_inspect) /* Policy allows */
1733 content_filter = jpeg_inspect_response;
1737 * Only write if we're not buffering for content modification
1739 if (!content_filter)
1741 /* write the server's (modified) header to
1742 * the client (along with anything else that
1743 * may be in the buffer)
1746 if (write_socket(csp->cfd, hdr, strlen(hdr))
1747 || ((len = flush_socket(csp->cfd, csp)) < 0))
1749 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1751 /* the write failed, so don't bother
1752 * mentioning it to the client...
1753 * it probably can't hear us anyway.
1762 /* we're finished with the server's header */
1767 /* If this was a MS IIS/5 hack then it means
1768 * the server has already closed the
1769 * connection. Nothing more to read. Time
1780 return; /* huh? we should never get here */
1783 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
1784 csp->ip_addr_str, http->ocmd, byte_count);
1788 /*********************************************************************
1792 * Description : This is little more than chat. We only "serve" to
1793 * to close any socket that chat may have opened.
1796 * 1 : csp = Current client state (buffers, headers, etc...)
1800 *********************************************************************/
1802 void serve(struct client_state *csp)
1803 #else /* ifndef AMIGA */
1804 static void serve(struct client_state *csp)
1805 #endif /* def AMIGA */
1808 close_socket(csp->cfd);
1810 if (csp->sfd != JB_INVALID_SOCKET)
1812 close_socket(csp->sfd);
1815 csp->flags &= ~CSP_FLAG_ACTIVE;
1821 /*********************************************************************
1823 * Function : server_thread
1825 * Description : We only exist to call `serve' in a threaded environment.
1828 * 1 : data = Current client state (buffers, headers, etc...)
1830 * Returns : Always 0.
1832 *********************************************************************/
1833 static int32 server_thread(void *data)
1835 serve((struct client_state *) data);
1842 /*********************************************************************
1846 * Description : Print usage info & exit.
1848 * Parameters : Pointer to argv[0] for identifying ourselves
1852 *********************************************************************/
1853 void usage(const char *myname)
1855 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
1857 "Usage: %s [--help] [--version] [configfile]\n"
1859 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
1861 "Aborting.\n", myname);
1868 /*********************************************************************
1872 * Description : Load the config file and start the listen loop.
1873 * This function is a lot more *sane* with the `load_config'
1874 * and `listen_loop' functions; although it stills does
1875 * a *little* too much for my taste.
1878 * 1 : argc = Number of parameters (including $0).
1879 * 2 : argv = Array of (char *)'s to the parameters.
1881 * Returns : 1 if : can't open config file, unrecognized directive,
1882 * stats requested in multi-thread mode, can't open the
1883 * log file, can't open the jar file, listen port is invalid,
1884 * any load fails, and can't bind port.
1886 * Else main never returns, the process must be signaled
1887 * to terminate execution. Or, on Windows, use the
1888 * "File", "Exit" menu option.
1890 *********************************************************************/
1892 int real_main(int argc, const char *argv[])
1894 int main(int argc, const char *argv[])
1899 unsigned int random_seed;
1900 #endif /* ifdef HAVE_RANDOM */
1902 struct passwd *pw = NULL;
1903 struct group *grp = NULL;
1912 #if !defined(_WIN32)
1920 * Parse the command line arguments
1922 while (++argc_pos < argc)
1925 /* Check to see if the service must be installed or uninstalled */
1926 if (strncmp(argv[argc_pos], "--install", 9) == 0)
1928 const char *pName = argv[argc_pos] + 9;
1931 exit( (install_service(pName)) ? 0 : 1 );
1933 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
1935 const char *pName = argv[argc_pos] + 11;
1938 exit((uninstall_service(pName)) ? 0 : 1);
1940 else if (strcmp(argv[argc_pos], "--service" ) == 0)
1942 bRunAsService = TRUE;
1943 w32_set_service_cwd();
1944 atexit(w32_service_exit_notify);
1947 #endif /* defined(_WIN32) */
1950 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1952 if (strcmp(argv[argc_pos], "--help") == 0)
1957 else if(strcmp(argv[argc_pos], "--version") == 0)
1959 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
1965 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
1970 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
1972 if (++argc_pos == argc) usage(argv[0]);
1973 pidfile = strdup(argv[argc_pos]);
1976 else if (strcmp(argv[argc_pos], "--user" ) == 0)
1978 if (++argc_pos == argc) usage(argv[argc_pos]);
1980 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
1983 if (NULL == (grp = getgrnam(p)))
1985 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
1989 if (NULL == (pw = getpwnam(argv[argc_pos])))
1991 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
1994 if (p != NULL) *--p = '\0';
1997 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
2002 #endif /* defined(unix) */
2003 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
2005 configfile = argv[argc_pos];
2008 } /* -END- while (more arguments) */
2011 if ( *configfile != '/' )
2013 char *abs_file, cwd[1024];
2015 /* make config-filename absolute here */
2016 if ( !(getcwd(cwd, sizeof(cwd))))
2018 perror("get working dir failed");
2022 if (!(basedir = strdup(cwd))
2023 || (!(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))))
2025 perror("malloc failed");
2028 strcpy( abs_file, basedir );
2029 strcat( abs_file, "/" );
2030 strcat( abs_file, configfile );
2031 configfile = abs_file;
2033 #endif /* defined unix */
2037 clients->next = NULL;
2041 #elif defined(_WIN32)
2045 #if defined(OSX_DARWIN) || defined(__OpenBSD__)
2047 * Prepare global mutex semaphores
2050 pthread_mutex_init(&gmtime_mutex,0);
2051 pthread_mutex_init(&localtime_mutex,0);
2052 #endif /* def OSX_DARWIN */
2053 pthread_mutex_init(&gethostbyaddr_mutex,0);
2054 pthread_mutex_init(&gethostbyname_mutex,0);
2055 #endif /* defined(OSX_DARWIN) || defined(__OpenBSD__) */
2057 #ifdef FEATURE_PTHREAD
2058 pthread_mutex_init(&log_mutex,0);
2059 pthread_mutex_init(&log_init_mutex,0);
2060 #endif /* FEATURE_PTHREAD */
2063 random_seed = (unsigned int)time(NULL);
2064 srandom(random_seed);
2065 #endif /* ifdef HAVE_RANDOM */
2068 * Unix signal handling
2070 * Catch the abort, interrupt and terminate signals for a graceful exit
2071 * Catch the hangup signal so the errlog can be reopened.
2072 * Ignore the broken pipe signals (FIXME: Why?)
2074 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
2077 const int catched_signals[] = { SIGABRT, SIGTERM, SIGINT, SIGHUP, 0 };
2078 const int ignored_signals[] = { SIGPIPE, 0 };
2080 for (idx = 0; catched_signals[idx] != 0; idx++)
2082 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
2084 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
2088 for (idx = 0; ignored_signals[idx] != 0; idx++)
2090 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
2092 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
2097 #else /* ifdef _WIN32 */
2098 # ifdef _WIN_CONSOLE
2100 * We *are* in a windows console app.
2101 * Print a verbose messages about FAQ's and such
2103 printf(win32_blurb);
2104 # endif /* def _WIN_CONSOLE */
2105 #endif /* def _WIN32 */
2108 /* Initialize the CGI subsystem */
2109 cgi_init_error_messages();
2112 * If runnig on unix and without the --nodaemon
2113 * option, become a daemon. I.e. fork, detach
2114 * from tty and get process group leadership
2127 if ( pid < 0 ) /* error */
2132 else if ( pid != 0 ) /* parent */
2137 * must check for errors
2138 * child died due to missing files aso
2141 wpid = waitpid( pid, &status, WNOHANG );
2150 /* Should be more portable, but not as well tested */
2155 #else /* ndef __FreeBSD__ */
2157 #endif /* ndef __FreeBSD__ */
2158 fd = open("/dev/tty", O_RDONLY);
2161 /* no error check here */
2162 ioctl( fd, TIOCNOTTY,0 );
2166 /* FIXME: should close stderr (fd 2) here too, but the test
2168 * and load config file is done in listen_loop() and puts
2169 * some messages on stderr there.
2176 } /* -END- if (!no_daemon) */
2179 * As soon as we have written the PID file, we can switch
2180 * to the user and group ID indicated by the --user option
2186 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
2188 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
2194 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
2196 if (chroot(pw->pw_dir) < 0)
2198 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
2202 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
2205 if (setuid(pw->pw_uid))
2207 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
2211 char putenv_dummy[64];
2213 strcpy(putenv_dummy, "HOME=/");
2214 if (putenv(putenv_dummy) != 0)
2216 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
2219 snprintf(putenv_dummy, 64, "USER=%s", pw->pw_name);
2220 if (putenv(putenv_dummy) != 0)
2222 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
2228 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
2231 #endif /* defined unix */
2234 /* This will be FALSE unless the command line specified --service
2238 /* Yup, so now we must attempt to establish a connection
2239 * with the service dispatcher. This will only work if this
2240 * process was launched by the service control manager to
2241 * actually run as a service. If this isn't the case, i've
2242 * known it take around 30 seconds or so for the call to return.
2245 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
2246 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
2248 /* Service has run, and at this point is now being stopped, so just return */
2253 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
2255 /* An error occurred. Usually it's because --service was wrongly specified
2256 * and we were unable to connect to the Service Control Dispatcher because
2257 * it wasn't expecting us and is therefore not listening.
2259 * For now, just continue below to call the listen_loop function.
2262 #endif /* def _WIN32 */
2272 /*********************************************************************
2274 * Function : bind_port_helper
2276 * Description : Bind the listen port. Handles logging, and aborts
2280 * 1 : config = Privoxy configuration. Specifies port
2283 * Returns : Port that was opened.
2285 *********************************************************************/
2286 static jb_socket bind_port_helper(struct configuration_spec * config)
2291 if ( (config->haddr != NULL)
2292 && (config->haddr[0] == '1')
2293 && (config->haddr[1] == '2')
2294 && (config->haddr[2] == '7')
2295 && (config->haddr[3] == '.') )
2297 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
2300 else if (config->haddr == NULL)
2302 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
2307 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
2308 config->hport, config->haddr);
2311 result = bind_port(config->haddr, config->hport, &bfd);
2318 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2319 "There may be another Privoxy or some other "
2320 "proxy running on port %d",
2321 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
2322 config->hport, config->hport);
2325 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2326 "The hostname is not resolvable",
2327 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2330 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
2331 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2334 /* shouldn't get here */
2335 return JB_INVALID_SOCKET;
2338 config->need_bind = 0;
2345 /* Without this simple workaround we get this compiler warning from _beginthread
2346 * warning C4028: formal parameter 1 different from declaration
2348 void w32_service_listen_loop(void *p)
2352 #endif /* def _WIN32 */
2355 /*********************************************************************
2357 * Function : listen_loop
2359 * Description : bind the listen port and enter a "FOREVER" listening loop.
2365 *********************************************************************/
2366 static void listen_loop(void)
2368 struct client_state *csp = NULL;
2370 struct configuration_spec * config;
2372 config = load_config();
2374 bfd = bind_port_helper(config);
2376 #ifdef FEATURE_GRACEFUL_TERMINATION
2377 while (!g_terminate)
2382 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
2383 while (waitpid(-1, NULL, WNOHANG) > 0)
2385 /* zombie children */
2387 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
2390 * Free data that was used by died threads
2396 * Re-open the errlog after HUP signal
2398 if (received_hup_signal)
2400 init_error_log(Argv[0], config->logfile, config->debug);
2401 received_hup_signal = 0;
2406 #ifdef FEATURE_COOKIE_JAR
2408 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
2409 * already open. I think unload_configfile() is not being run, which should do
2410 * this work. Until that can get resolved, we'll use this workaround.
2414 if (csp->config->jar)
2416 fclose(csp->config->jar);
2417 csp->config->jar = NULL;
2419 #endif /* FEATURE_COOKIE_JAR */
2420 #endif /* __OS2__ */
2422 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
2424 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
2428 csp->flags |= CSP_FLAG_ACTIVE;
2429 csp->sfd = JB_INVALID_SOCKET;
2431 csp->config = config = load_config();
2433 if ( config->need_bind )
2436 * Since we were listening to the "old port", we will not see
2437 * a "listen" param change until the next IJB request. So, at
2438 * least 1 more request must be made for us to find the new
2439 * setting. I am simply closing the old socket and binding the
2442 * Which-ever is correct, we will serve 1 more page via the
2443 * old settings. This should probably be a "show-proxy-args"
2444 * request. This should not be a so common of an operation
2445 * that this will hurt people's feelings.
2450 bfd = bind_port_helper(config);
2453 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
2455 if (!accept_connection(csp, bfd))
2457 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
2470 log_error(LOG_LEVEL_CONNECT, "OK");
2473 #ifdef FEATURE_TOGGLE
2474 if (global_toggle_state)
2476 csp->flags |= CSP_FLAG_TOGGLED_ON;
2478 #endif /* def FEATURE_TOGGLE */
2480 if (run_loader(csp))
2482 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
2483 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2487 if (block_acl(NULL,csp))
2489 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
2490 close_socket(csp->cfd);
2494 #endif /* def FEATURE_ACL */
2496 /* add it to the list of clients */
2497 csp->next = clients->next;
2498 clients->next = csp;
2500 if (config->multi_threaded)
2504 /* this is a switch () statment in the C preprocessor - ugh */
2505 #undef SELECTED_ONE_OPTION
2507 /* Use Pthreads in preference to native code */
2508 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
2509 #define SELECTED_ONE_OPTION
2511 pthread_t the_thread;
2512 pthread_attr_t attrs;
2514 pthread_attr_init(&attrs);
2515 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
2516 errno = pthread_create(&the_thread, &attrs,
2518 child_id = errno ? -1 : 0;
2519 pthread_attr_destroy(&attrs);
2523 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
2524 #define SELECTED_ONE_OPTION
2525 child_id = _beginthread(
2526 (void (*)(void *))serve,
2531 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
2532 #define SELECTED_ONE_OPTION
2533 child_id = _beginthread(
2534 (void(* _Optlink)(void*))serve,
2540 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
2541 #define SELECTED_ONE_OPTION
2543 thread_id tid = spawn_thread
2544 (server_thread, "server", B_NORMAL_PRIORITY, csp);
2546 if ((tid >= 0) && (resume_thread(tid) == B_OK))
2548 child_id = (int) tid;
2557 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2558 #define SELECTED_ONE_OPTION
2559 csp->cfd = ReleaseSocket(csp->cfd, -1);
2561 if((child_id = (int)CreateNewProcTags(
2562 NP_Entry, (ULONG)server_thread,
2563 NP_Output, Output(),
2564 NP_CloseOutput, FALSE,
2565 NP_Name, (ULONG)"privoxy child",
2566 NP_StackSize, 200*1024,
2570 ((struct Task *)child_id)->tc_UserData = csp;
2571 Signal((struct Task *)child_id, SIGF_SINGLE);
2576 #if !defined(SELECTED_ONE_OPTION)
2579 /* This block is only needed when using fork().
2580 * When using threads, the server thread was
2581 * created and run by the call to _beginthread().
2583 if (child_id == 0) /* child */
2586 #ifdef FEATURE_TOGGLE
2587 int inherited_toggle_state = global_toggle_state;
2588 #endif /* def FEATURE_TOGGLE */
2593 * If we've been toggled or we've blocked the request, tell Mom
2596 #ifdef FEATURE_TOGGLE
2597 if (inherited_toggle_state != global_toggle_state)
2599 rc |= RC_FLAG_TOGGLED;
2601 #endif /* def FEATURE_TOGGLE */
2603 #ifdef FEATURE_STATISTICS
2604 if (csp->flags & CSP_FLAG_REJECTED)
2606 rc |= RC_FLAG_BLOCKED;
2608 #endif /* ndef FEATURE_STATISTICS */
2612 else if (child_id > 0) /* parent */
2614 /* in a fork()'d environment, the parent's
2615 * copy of the client socket and the CSP
2619 #if !defined(_WIN32) && !defined(__CYGWIN__)
2621 wait( &child_status );
2624 * Evaluate child's return code: If the child has
2625 * - been toggled, toggle ourselves
2626 * - blocked its request, bump up the stats counter
2629 #ifdef FEATURE_TOGGLE
2630 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
2632 global_toggle_state = !global_toggle_state;
2634 #endif /* def FEATURE_TOGGLE */
2636 #ifdef FEATURE_STATISTICS
2638 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
2642 #endif /* def FEATURE_STATISTICS */
2644 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
2645 close_socket(csp->cfd);
2646 csp->flags &= ~CSP_FLAG_ACTIVE;
2650 #undef SELECTED_ONE_OPTION
2651 /* end of cpp switch () */
2653 if (child_id < 0) /* failed */
2655 char buf[BUFFER_SIZE];
2657 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
2659 sprintf(buf , "Privoxy: can't fork: errno = %d", errno);
2661 write_socket(csp->cfd, buf, strlen(buf));
2662 close_socket(csp->cfd);
2663 csp->flags &= ~CSP_FLAG_ACTIVE;
2674 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
2676 /* Clean up. Aim: free all memory (no leaks) */
2677 #ifdef FEATURE_GRACEFUL_TERMINATION
2679 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
2681 unload_current_config_file();
2682 unload_current_actions_file();
2683 unload_current_re_filterfile();
2684 #ifdef FEATURE_TRUST
2685 unload_current_trust_file();
2688 if (config->multi_threaded)
2695 } while ((clients->next != NULL) && (--i > 0));
2699 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
2710 #ifdef FEATURE_COOKIE_JAR
2711 if (NULL != config->jar)
2713 fclose(config->jar);
2717 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
2718 /* Cleanup - remove taskbar icon etc. */
2723 #endif /* FEATURE_GRACEFUL_TERMINATION */