1 const char jcc_rcs[] = "$Id: jcc.c,v 1.113 2006/12/26 17:38:50 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 1.113 2006/12/26 17:38:50 fabiankeil
37 * Silence compiler warning I introduced with my last commit.
39 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
40 * Mutex protect rand() if POSIX threading
41 * is used, warn the user if that's not possible
42 * and stop using it on _WIN32 where it could
45 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
46 * Don't prevent core dumps by catching SIGABRT.
47 * It's rude and makes debugging unreasonable painful.
49 * Revision 1.110 2006/12/13 14:52:53 etresoft
50 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
52 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
53 * Privoxy is now able to run as intercepting
54 * proxy in combination with any packet filter
55 * that does the port redirection. The destination
56 * is extracted from the "Host:" header which
57 * should be available for nearly all requests.
59 * Moved HTTP snipplets into jcc.c.
60 * Added error message for gopher proxy requests.
62 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
63 * Only unlink the pidfile if it's actually used.
65 * Change order of interception checks to make
66 * it possible to block or redirect requests for
69 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
70 * Make pthread mutex locking more generic. Instead of
71 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
72 * and use mutex locking unless there is an _r function
73 * available. Better safe than sorry.
75 * Fixes "./configure --disable-pthread" and should result
76 * in less threading-related problems on pthread-using platforms,
77 * but it still doesn't fix BR#1122404.
79 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
80 * Move pthread.h inclusion from jcc.c to jcc.h.
81 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
83 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
84 * Don't exit after receiving the second SIGHUP on Solaris.
86 * Fixes BR 1052235, but the same problem may exist on other
87 * systems. Once 3.0.6 is out we should use sigset()
88 * where available and see if it breaks anything.
90 * Revision 1.104 2006/09/23 13:26:38 roro
91 * Replace TABs by spaces in source code.
93 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
94 * Fix +redirect{}. Didn't work with -fast-redirects.
96 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
97 * Respond with 400 and a short text message
98 * if the client tries to use Privoxy as FTP proxy.
100 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
101 * Make number of retries in case of forwarded-connect problems
102 * a config file option (forwarded-connect-retries) and use 0 as
105 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
106 * Set random(3) seed.
108 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
109 * Follow the OpenBSD port's lead and protect the resolve
110 * functions on OpenBSD as well.
112 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
113 * --user fix. Only use the user as group if no group is specified.
114 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
116 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
117 * Windows service (re-)integration
121 * --install[:service_name]
122 * --uninstall[:service_name]
125 * They work as follows:
126 * --install will create a service for you and then terminate.
127 * By default the service name will be "privoxy" (without the quotes).
128 * However you can run multiple services if you wish, just by adding
129 * a colon and then a name (no spaces).
131 * --uninstall follows the exact same rules a --install.
133 * --service is used when the program is executed by the service
134 * control manager, and in normal circumstances would never be
135 * used as a command line argument.
137 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
138 * Windows service integration
140 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
141 * Incorporate Fabian Keil's patch work:
142 http://www.fabiankeil.de/sourcecode/privoxy/
144 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
145 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
146 * with what was really the latest development (the v_3_0_branch branch)
148 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
149 * Thanks to Jindrich Makovicka for a race condition fix for the log
150 * file. The race condition remains for non-pthread implementations.
151 * Reference patch #1175720.
153 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
154 * Add the ability to check jpeg images for invalid
155 * lengths of comment blocks. Defensive strategy
156 * against the exploit:
157 * Microsoft Security Bulletin MS04-028
158 * Buffer Overrun in JPEG Processing (GDI+) Could
159 * Allow Code Execution (833987)
160 * Enabled with +inspect-jpegs in actions files.
162 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
163 * - Fixed usage info for non-unix platforms
164 * - Fixed small cmdline parsing bug
166 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
167 * Diagnostics: Now preserve the returncode of pthread_create
168 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
170 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
171 * No longer ignore SIGCHLD. Fixes bug #769381
173 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
174 * Close jarfile on graceful exit, remove stray line
176 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
177 * Cosmetics: Killed a warning, a typo and an allocation left at exit
179 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
180 * No longer rely on non-POSIX.1 extensions of getcwd().
183 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
184 * Replaced setenv() by posix-compliant putenv()
185 * Thanks to Neil McCalden (nmcc AT users.sf.net).
187 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
188 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
190 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
191 * Clean-up and extension of improvements for forked mode:
192 * - Child's return code now consists of flags RC_FLAG_*
193 * - Reporting toggle to parent now properly #ifdef'ed
194 * - Children now report blocking to parent. This enables
195 * statistics in forked mode
197 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
198 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
199 * Children now report having been toggled through _exit(17), parents
200 * watch for that code and toggle themselves if found.
202 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
203 * Wrapping all *_r functions (the non-_r versions of them) with
204 * mutex semaphores for OSX. Hopefully this will take care of all
205 * of those pesky crash reports.
207 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
208 * Fixed two mostly harmless mem leaks
210 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
211 * Fix: Head of global clients list now initialized to NULL
213 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
214 * Added basic support for OPTIONS and TRACE HTTP methods:
215 * - New interceptor direct_response() added in chat().
216 * - sed() moved to earlier in the process, so that the
217 * Host: header is evaluated before actions and forwarding
220 * Revision 1.92 2002/05/08 16:00:46 oes
221 * Chat's buffer handling:
222 * - Fixed bug with unchecked out-of-mem conditions
223 * while reading client request & server headers
224 * - No longer predict if the buffer limit will be exceeded
225 * in the next read -- check add_to_iob's new
226 * return code. If buffer couldn't be extended
227 * (policy or out-of-mem) while
228 * - reading from client: abort
229 * - reading server headers: send error page
230 * - buffering server body for filter: flush,
231 * and if that fails: send error page
233 * Revision 1.91 2002/04/08 20:35:58 swa
236 * Revision 1.90 2002/04/02 14:57:28 oes
237 * Made sending wafers independent of FEATURE_COOKIE_JAR
239 * Revision 1.89 2002/03/31 17:18:59 jongfoster
240 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
242 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
243 * More compiler warning message maintenance
245 * Revision 1.87 2002/03/26 22:29:54 swa
246 * we have a new homepage!
248 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
249 * Workaround for closing the jarfile before load_config() comes around again
251 * Revision 1.85 2002/03/24 15:23:33 jongfoster
254 * Revision 1.84 2002/03/24 13:25:43 swa
255 * name change related issues
257 * Revision 1.83 2002/03/16 23:54:06 jongfoster
258 * Adding graceful termination feature, to help look for memory leaks.
259 * If you enable this (which, by design, has to be done by hand
260 * editing config.h) and then go to http://i.j.b/die, then the program
261 * will exit cleanly after the *next* request. It should free all the
262 * memory that was used.
264 * Revision 1.82 2002/03/13 00:27:05 jongfoster
267 * Revision 1.81 2002/03/12 01:42:50 oes
268 * Introduced modular filters
270 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
271 * OS/2 port maintenance:
272 * - Fixed EMX build - it had decayed a little
273 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
274 * substituted a memset for now.
276 * Revision 1.79 2002/03/09 20:03:52 jongfoster
277 * - Making various functions return int rather than size_t.
278 * (Undoing a recent change). Since size_t is unsigned on
279 * Windows, functions like read_socket that return -1 on
280 * error cannot return a size_t.
282 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
283 * crashes, and also frequently caused JB to jump to 100%
284 * CPU and stay there. (Because it thought it had just
285 * read ((unsigned)-1) == 4Gb of data...)
287 * - The signature of write_socket has changed, it now simply
288 * returns success=0/failure=nonzero.
290 * - Trying to get rid of a few warnings --with-debug on
291 * Windows, I've introduced a new type "jb_socket". This is
292 * used for the socket file descriptors. On Windows, this
293 * is SOCKET (a typedef for unsigned). Everywhere else, it's
294 * an int. The error value can't be -1 any more, so it's
295 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
296 * Windows it maps to the #define INVALID_SOCKET.)
298 * - The signature of bind_port has changed.
300 * Revision 1.78 2002/03/08 21:35:04 oes
301 * Added optional group supplement to --user option. Will now use default group of user if no group given
303 * Revision 1.77 2002/03/07 03:52:06 oes
304 * - Fixed compiler warnings etc
305 * - Improved handling of failed DNS lookups
307 * Revision 1.76 2002/03/06 22:54:35 jongfoster
308 * Automated function-comment nitpicking.
310 * Revision 1.75 2002/03/06 10:02:19 oes
311 * Fixed stupid bug when --user was not given
313 * Revision 1.74 2002/03/06 00:49:31 jongfoster
314 * Fixing warning on Windows
315 * Making #ifdefs that refer to the same variable consistently
316 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
318 * Revision 1.73 2002/03/05 23:57:30 hal9
319 * Stray character 's' on line 1618 was breaking build.
321 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
322 * - Re-enable OS/2 building after new parms were added
323 * - Fix false out of memory report when resolving CGI templates when no IP
324 * address is available of failed attempt (a la no such domain)
326 * Revision 1.71 2002/03/05 18:13:56 oes
327 * Added --user option
329 * Revision 1.70 2002/03/05 04:52:42 oes
330 * Deleted non-errlog debugging code
332 * Revision 1.69 2002/03/04 23:50:00 jongfoster
333 * Splitting off bind_port() call into bind_port_helper(), with
336 * Revision 1.68 2002/03/04 20:17:32 oes
339 * Revision 1.67 2002/03/04 18:18:57 oes
340 * - Removed _DEBUG mode
341 * - Cleand up cmdline parsing
342 * - Introduced --no-daemon, --pidfile options
343 * - Cleaned up signal handling:
344 * - Terminate cleanly on INT, TERM and ABRT
345 * - Schedule logfile for re-opening on HUP
346 * - Ignore CHLD and PIPE
347 * - Leave the rest with their default handlers
348 * - Uniform handler registration
349 * - Added usage() function
350 * - Played styleguide police
352 * Revision 1.66 2002/03/03 15:06:55 oes
353 * Re-enabled automatic config reloading
355 * Revision 1.65 2002/03/03 14:49:11 oes
356 * Fixed CLF logging: Now uses client's original HTTP request
358 * Revision 1.64 2002/03/03 09:18:03 joergs
359 * Made jumbjuster work on AmigaOS again.
361 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
362 * Clean up a little CRLF unpleasantness that suddenly appeared
364 * Revision 1.62 2002/02/20 23:17:23 jongfoster
365 * Detecting some out-of memory conditions and exiting with a log message.
367 * Revision 1.61 2002/01/17 21:01:52 jongfoster
368 * Moving all our URL and URL pattern parsing code to urlmatch.c.
370 * Revision 1.60 2001/12/30 14:07:32 steudten
371 * - Add signal handling (unix)
372 * - Add SIGHUP handler (unix)
373 * - Add creation of pidfile (unix)
374 * - Add action 'top' in rc file (RH)
375 * - Add entry 'SIGNALS' to manpage
376 * - Add exit message to logfile (unix)
378 * Revision 1.59 2001/12/13 14:07:18 oes
379 * Fixed Bug: 503 error page now sent OK
381 * Revision 1.58 2001/11/30 23:37:24 jongfoster
382 * Renaming the Win32 config file to config.txt - this is almost the
383 * same as the corresponding UNIX name "config"
385 * Revision 1.57 2001/11/16 00:47:43 jongfoster
386 * Changing the tty-disconnection code to use setsid().
388 * Revision 1.56 2001/11/13 20:20:54 jongfoster
389 * Tabs->spaces, fixing a bug with missing {} around an if()
391 * Revision 1.55 2001/11/13 20:14:53 jongfoster
392 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
394 * Revision 1.54 2001/11/07 00:03:14 steudten
395 * Give reliable return value if an error
396 * occurs not just 0 with new daemon mode.
398 * Revision 1.53 2001/11/05 21:41:43 steudten
399 * Add changes to be a real daemon just for unix os.
400 * (change cwd to /, detach from controlling tty, set
401 * process group and session leader to the own process.
403 * Add some fatal-error log message for failed malloc().
404 * Add '-d' if compiled with 'configure --with-debug' to
405 * enable debug output.
407 * Revision 1.52 2001/10/26 20:11:20 jongfoster
408 * Fixing type mismatch
410 * Revision 1.51 2001/10/26 17:38:28 oes
413 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
414 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
415 * threads to call select() simultaneously. So, it's time to do a real, live,
416 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
417 * (native). Both versions will work, but using __OS2__ offers multi-threading.
419 * Revision 1.49 2001/10/23 21:41:35 jongfoster
420 * Added call to initialize the (statically-allocated of course)
421 * "out of memory" CGI response.
423 * Revision 1.48 2001/10/10 19:56:46 jongfoster
424 * Moving some code that wasn't cookie-related out of an #ifdef
427 * Revision 1.47 2001/10/10 16:44:36 oes
428 * Added CONNECT destination port limitation check
430 * Revision 1.46 2001/10/08 15:17:41 oes
431 * Re-enabled SSL forwarding
433 * Revision 1.45 2001/10/07 15:42:11 oes
434 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
436 * Moved downgrading of the HTTP version from parse_http_request to
437 * chat(), since we can't decide if it is necessary before we have
438 * determined the actions for the URL. The HTTP command is now
439 * *always* re-built so the repairs need no longer be special-cased.
441 * filter_popups now gets a csp pointer so it can raise the new
442 * CSP_FLAG_MODIFIED flag.
446 * Added configurable size limit for the IOB. If the IOB grows so
447 * large that the next read would exceed the limit, the header
448 * is generated, and the header & unfiltered buffer are flushed
449 * to the client. Chat then continues in non-buffering,
450 * non-filtering body mode.
452 * Revision 1.44 2001/10/02 18:13:57 oes
455 * Revision 1.43 2001/10/02 15:32:13 oes
456 * Moved generation of hdr
458 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
459 * Cleaning up 2 compiler warnings on OS/2.
461 * Revision 1.41 2001/09/16 17:05:14 jongfoster
462 * Removing unused #include showarg.h
464 * Revision 1.40 2001/09/16 15:41:45 jongfoster
465 * Fixing signed/unsigned comparison warning.
467 * Revision 1.39 2001/09/16 13:21:27 jongfoster
468 * Changes to use new list functions.
470 * Revision 1.38 2001/09/16 13:01:46 jongfoster
471 * Removing redundant function call that zeroed zalloc()'d memory.
473 * Revision 1.37 2001/09/10 11:12:24 oes
474 * Deleted unused variable
476 * Revision 1.36 2001/09/10 10:56:15 oes
477 * Silenced compiler warnings
479 * Revision 1.35 2001/07/31 14:44:22 oes
480 * Deleted unused size parameter from filter_popups()
482 * Revision 1.34 2001/07/30 22:08:36 jongfoster
483 * Tidying up #defines:
484 * - All feature #defines are now of the form FEATURE_xxx
485 * - Permanently turned off WIN_GUI_EDIT
486 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
488 * Revision 1.33 2001/07/29 19:32:00 jongfoster
489 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
491 * Revision 1.32 2001/07/29 18:47:05 jongfoster
492 * Adding missing #include "loadcfg.h"
494 * Revision 1.31 2001/07/29 12:17:48 oes
495 * Applied pthread fix by Paul Lieverse
497 * Revision 1.30 2001/07/25 22:57:13 jongfoster
498 * __BEOS__ no longer overrides FEATURE_PTHREAD.
499 * This is because FEATURE_PTHREAD will soon be widely used, so I
500 * want to keep it simple.
502 * Revision 1.29 2001/07/24 12:47:06 oes
503 * Applied BeOS support update by Eugenia
505 * Revision 1.28 2001/07/23 13:26:12 oes
506 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
508 * Revision 1.27 2001/07/19 19:09:47 haroon
509 * - Added code to take care of the situation where while processing the first
510 * server response (which includes the server header), after finding the end
511 * of the headers we were not looking past the end of the headers for
512 * content modification. I enabled it for filter_popups.
513 * Someone else should look to see if other similar operations should be
514 * done to the discarded portion of the buffer.
516 * Note 2001/07/20: No, the other content modification mechanisms will process
517 * the whole iob later anyway. --oes
519 * Revision 1.26 2001/07/18 12:31:36 oes
522 * Revision 1.25 2001/07/15 19:43:49 jongfoster
523 * Supports POSIX threads.
524 * Also removed some unused #includes.
526 * Revision 1.24 2001/07/13 14:00:40 oes
527 * - Generic content modification scheme:
528 * Each feature has its own applicability flag that is set
529 * from csp->action->flags.
530 * Replaced the "filtering" int flag , by a function pointer
531 * "content_filter" to the function that will do the content
532 * modification. If it is != NULL, the document will be buffered
533 * and processed through *content_filter, which must set
534 * csp->content_length and return a modified copy of the body
535 * or return NULL (on failiure).
536 * - Changed csp->is_text to the more generic bitmap csp->content_type
537 * which can currently take the valued CT_TEXT or CT_GIF
539 * - Removed all #ifdef PCRS
541 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
542 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
543 * the `block_acl' call. This prevents a compilation error when the user
544 * does not wish to use the "ACL" feature.
546 * Revision 1.22 2001/06/29 21:45:41 oes
547 * Indentation, CRLF->LF, Tab-> Space
549 * Revision 1.21 2001/06/29 13:29:36 oes
550 * - Cleaned up, improved comments
551 * - Unified all possible interceptors (CGI,
552 * block, trust, fast_redirect) in one
553 * place, with one (CGI) answer generation
554 * mechansim. Much clearer now.
555 * - Removed the GIF image generation, which
556 * is now done in filters.c:block_url()
557 * - Made error conditions like domain lookup
558 * failiure or (various) problems while talking
559 * to the server use cgi.c:error_response()
560 * instead of generating HTML/HTTP in chat() (yuck!)
561 * - Removed logentry from cancelled commit
563 * Revision 1.20 2001/06/09 10:55:28 jongfoster
564 * Changing BUFSIZ ==> BUFFER_SIZE
566 * Revision 1.19 2001/06/07 23:12:52 jongfoster
567 * Replacing function pointer in struct gateway with a directly
568 * called function forwarded_connect().
569 * Replacing struct gateway with struct forward_spec
571 * Revision 1.18 2001/06/03 19:12:16 oes
572 * introduced new cgi handling
574 * Revision 1.17 2001/06/01 20:07:23 jongfoster
575 * Now uses action +image-blocker{} rather than config->tinygif
577 * Revision 1.16 2001/06/01 18:49:17 jongfoster
578 * Replaced "list_share" with "list" - the tiny memory gain was not
579 * worth the extra complexity.
581 * Revision 1.15 2001/05/31 21:24:47 jongfoster
582 * Changed "permission" to "action" throughout.
583 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
584 * Moved vanilla wafer check into chat(), since we must now
585 * decide whether or not to add it based on the URL.
587 * Revision 1.14 2001/05/29 20:14:01 joergs
588 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
591 * Revision 1.13 2001/05/29 09:50:24 jongfoster
592 * Unified blocklist/imagelist/permissionslist.
593 * File format is still under discussion, but the internal changes
596 * Also modified interceptor behaviour:
597 * - We now intercept all URLs beginning with one of the following
598 * prefixes (and *only* these prefixes):
600 * * http://ijbswa.sf.net/config/
601 * * http://ijbswa.sourceforge.net/config/
602 * - New interceptors "home page" - go to http://i.j.b/ to see it.
603 * - Internal changes so that intercepted and fast redirect pages
604 * are not replaced with an image.
605 * - Interceptors now have the option to send a binary page direct
606 * to the client. (i.e. ijb-send-banner uses this)
607 * - Implemented show-url-info interceptor. (Which is why I needed
608 * the above interceptors changes - a typical URL is
609 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
610 * The previous mechanism would not have intercepted that, and
611 * if it had been intercepted then it then it would have replaced
614 * Revision 1.12 2001/05/27 22:17:04 oes
616 * - re_process_buffer no longer writes the modified buffer
617 * to the client, which was very ugly. It now returns the
618 * buffer, which it is then written by chat.
620 * - content_length now adjusts the Content-Length: header
621 * for modified documents rather than crunch()ing it.
622 * (Length info in csp->content_length, which is 0 for
623 * unmodified documents)
625 * - For this to work, sed() is called twice when filtering.
627 * Revision 1.11 2001/05/26 17:27:53 jongfoster
628 * Added support for CLF and fixed LOG_LEVEL_LOG.
629 * Also did CRLF->LF fix of my previous patch.
631 * Revision 1.10 2001/05/26 15:26:15 jongfoster
632 * ACL feature now provides more security by immediately dropping
633 * connections from untrusted hosts.
635 * Revision 1.9 2001/05/26 00:28:36 jongfoster
636 * Automatic reloading of config file.
637 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
638 * Most of the global variables have been moved to a new
639 * struct configuration_spec, accessed through csp->config->globalname
640 * Most of the globals remaining are used by the Win32 GUI.
642 * Revision 1.8 2001/05/25 22:43:18 jongfoster
643 * Fixing minor memory leak and buffer overflow.
645 * Revision 1.7 2001/05/25 22:34:30 jongfoster
648 * Revision 1.6 2001/05/23 00:13:58 joergs
649 * AmigaOS support fixed.
651 * Revision 1.5 2001/05/22 18:46:04 oes
653 * - Enabled filtering banners by size rather than URL
654 * by adding patterns that replace all standard banner
655 * sizes with the "Junkbuster" gif to the re_filterfile
657 * - Enabled filtering WebBugs by providing a pattern
658 * which kills all 1x1 images
660 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
661 * which is selected by the (nonstandard and therefore
662 * capital) letter 'U' in the option string.
663 * It causes the quantifiers to be ungreedy by default.
664 * Appending a ? turns back to greedy (!).
666 * - Added a new interceptor ijb-send-banner, which
667 * sends back the "Junkbuster" gif. Without imagelist or
668 * MSIE detection support, or if tinygif = 1, or the
669 * URL isn't recognized as an imageurl, a lame HTML
670 * explanation is sent instead.
672 * - Added new feature, which permits blocking remote
673 * script redirects and firing back a local redirect
675 * The feature is conditionally compiled, i.e. it
676 * can be disabled with --disable-fast-redirects,
677 * plus it must be activated by a "fast-redirects"
678 * line in the config file, has its own log level
679 * and of course wants to be displayed by show-proxy-args
680 * Note: Boy, all the #ifdefs in 1001 locations and
681 * all the fumbling with configure.in and acconfig.h
682 * were *way* more work than the feature itself :-(
684 * - Because a generic redirect template was needed for
685 * this, tinygif = 3 now uses the same.
687 * - Moved GIFs, and other static HTTP response templates
692 * - Removed some >400 CRs again (Jon, you really worked
695 * Revision 1.4 2001/05/21 19:34:01 jongfoster
696 * Made failure to bind() a fatal error.
698 * Revision 1.3 2001/05/20 01:21:20 jongfoster
699 * Version 2.9.4 checkin.
700 * - Merged popupfile and cookiefile, and added control over PCRS
701 * filtering, in new "permissionsfile".
702 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
703 * file error you now get a message box (in the Win32 GUI) rather
704 * than the program exiting with no explanation.
705 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
707 * - Removed tabs from "config"
708 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
709 * - Bumped up version number.
711 * Revision 1.2 2001/05/17 22:34:44 oes
712 * - Added hint on GIF char array generation to jcc.c
713 * - Cleaned CRLF's from the sources and related files
714 * - Repaired logging for REF and FRC
716 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
717 * Initial import of version 2.9.3 source tree
720 *********************************************************************/
726 #include <sys/types.h>
734 # ifndef FEATURE_PTHREAD
738 # include <windows.h>
739 # include <process.h>
740 # endif /* ndef FEATURE_PTHREAD */
743 # ifndef _WIN_CONSOLE
745 # endif /* ndef _WIN_CONSOLE */
746 # include "w32svrapi.h"
748 #else /* ifndef _WIN32 */
750 # if !defined (__OS2__)
752 # include <sys/wait.h>
753 # endif /* ndef __OS2__ */
754 # include <sys/time.h>
755 # include <sys/stat.h>
756 # include <sys/ioctl.h>
759 #include <sys/termios.h>
770 # include <socket.h> /* BeOS has select() for sockets only. */
771 # include <OS.h> /* declarations for threads and stuff. */
774 # if defined(__EMX__) || defined(__OS2__)
775 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
780 #define bzero(B,N) memset(B,0x00,n)
795 #include "killpopup.h"
796 #include "miscutil.h"
798 #include "jbsockets.h"
803 #include "urlmatch.h"
805 const char jcc_h_rcs[] = JCC_H_VERSION;
806 const char project_h_rcs[] = PROJECT_H_VERSION;
809 struct client_state clients[1];
810 struct file_list files[1];
812 #ifdef FEATURE_STATISTICS
813 int urls_read = 0; /* total nr of urls read inc rejected */
814 int urls_rejected = 0; /* total nr of urls rejected */
815 #endif /* def FEATURE_STATISTICS */
817 #ifdef FEATURE_GRACEFUL_TERMINATION
821 static void listen_loop(void);
822 static void chat(struct client_state *csp);
824 void serve(struct client_state *csp);
825 #else /* ifndef AMIGA */
826 static void serve(struct client_state *csp);
827 #endif /* def AMIGA */
830 static int32 server_thread(void *data);
831 #endif /* def __BEOS__ */
834 #define sleep(N) Sleep(((N) * 1000))
838 #define sleep(N) DosSleep(((N) * 100))
841 #ifdef FEATURE_PTHREAD
842 pthread_mutex_t log_mutex;
843 pthread_mutex_t log_init_mutex;
845 #ifndef HAVE_GMTIME_R
846 pthread_mutex_t gmtime_mutex;
847 #endif /* ndef HAVE_GMTIME_R */
849 #ifndef HAVE_LOCALTIME_R
850 pthread_mutex_t localtime_mutex;
851 #endif /* ndef HAVE_GMTIME_R */
853 #ifndef HAVE_GETHOSTBYADDR_R
854 pthread_mutex_t gethostbyaddr_mutex;
855 #endif /* ndef HAVE_GETHOSTBYADDR_R */
857 #ifndef HAVE_GETHOSTBYNAME_R
858 pthread_mutex_t gethostbyname_mutex;
859 #endif /* ndef HAVE_GETHOSTBYNAME_R */
862 pthread_mutex_t rand_mutex;
863 #endif /* ndef HAVE_RANDOM */
865 #endif /* FEATURE_PTHREAD */
867 #if defined(unix) || defined(__EMX__)
868 const char *basedir = NULL;
869 const char *pidfile = NULL;
870 int received_hup_signal = 0;
871 #endif /* defined unix */
873 /* The vanilla wafer. */
874 static const char VANILLA_WAFER[] =
875 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
876 "Do_not_send_me_any_copyrighted_information_other_than_the_"
877 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
878 "In_particular_do_not_send_me_any_cookies_that_"
879 "are_subject_to_a_claim_of_copyright_by_anybody._"
880 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
881 "(copyright_or_otherwise)_applying_to_any_cookie._";
883 /* HTTP snipplets. */
884 const char CSUCCEED[] =
885 "HTTP/1.0 200 Connection established\n"
886 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
888 const char CHEADER[] =
889 "HTTP/1.0 400 Invalid header received from browser\r\n"
890 "Connection: close\r\n\r\n"
891 "Invalid header received from browser.";
893 const char CFORBIDDEN[] =
894 "HTTP/1.0 403 Connection not allowable\r\n"
895 "X-Hint: If you read this message interactively, then you know why this happens ,-)\r\n"
896 "Connection: close\r\n\r\n";
898 const char FTP_RESPONSE[] =
899 "HTTP/1.0 400 Invalid request received from browser\r\n"
900 "Connection: close\r\n\r\n"
901 "Invalid request. Privoxy doesn't support FTP.\r\n";
903 const char GOPHER_RESPONSE[] =
904 "HTTP/1.0 400 Invalid request received from browser\r\n"
905 "Connection: close\r\n\r\n"
906 "Invalid request. Privoxy doesn't support gopher.\r\n";
908 const char MISSING_DESTINATION_RESPONSE[] =
909 "HTTP/1.0 400 Bad request received from browser\r\n"
910 "Connection: close\r\n\r\n"
911 "Bad request. Privoxy was unable to extract the destination.\r\n";
914 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
915 /*********************************************************************
917 * Function : sig_handler
919 * Description : Signal handler for different signals.
920 * Exit gracefully on TERM and INT
921 * or set a flag that will cause the errlog
922 * to be reopened by the main thread on HUP.
925 * 1 : the_signal = the signal cause this function to call
929 *********************************************************************/
930 static void sig_handler(int the_signal)
936 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
947 received_hup_signal = 1;
952 * We shouldn't be here, unless we catch signals
953 * in main() that we can't handle here!
955 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
963 /*********************************************************************
967 * Description : Once a connection to the client has been accepted,
968 * this function is called (via serve()) to handle the
969 * main business of the communication. When this
970 * function returns, the caller must close the client
974 * 1 : csp = Current client state (buffers, headers, etc...)
976 * Returns : On success, the number of bytes written are returned (zero
977 * indicates nothing was written). On error, -1 is returned,
978 * and errno is set appropriately. If count is zero and the
979 * file descriptor refers to a regular file, 0 will be
980 * returned without causing any other effect. For a special
981 * file, the results are not portable.
983 *********************************************************************/
984 static void chat(struct client_state *csp)
987 * This next lines are a little ugly, but they simplifies the if statements
988 * below. Basically if TOGGLE, then we want the if to test if the
989 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
990 * then we want the if to test for CSP_FLAG_FORCED , else we don't
992 #ifdef FEATURE_TOGGLE
993 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
994 #else /* ifndef FEATURE_TOGGLE */
995 # define IS_TOGGLED_ON_AND
996 #endif /* ndef FEATURE_TOGGLE */
997 #ifdef FEATURE_FORCE_LOAD
998 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
999 #else /* ifndef FEATURE_FORCE_LOAD */
1000 # define IS_NOT_FORCED_AND
1001 #endif /* def FEATURE_FORCE_LOAD */
1003 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
1005 char buf[BUFFER_SIZE];
1013 int ms_iis5_hack = 0;
1015 unsigned int forwarded_connect_retries = 0;
1016 unsigned int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
1017 const struct forward_spec * fwd;
1018 struct http_request *http;
1019 int len; /* for buffer sizes */
1020 #ifdef FEATURE_KILL_POPUPS
1021 int block_popups; /* bool, 1==will block popups */
1022 int block_popups_now = 0; /* bool, 1==currently blocking popups */
1023 #endif /* def FEATURE_KILL_POPUPS */
1025 int pcrs_filter; /* bool, 1==will filter through pcrs */
1026 int gif_deanimate; /* bool, 1==will deanimate gifs */
1027 int jpeg_inspect; /* bool, 1==will inspect jpegs */
1029 /* Function that does the content filtering for the current request */
1030 char *(*content_filter)() = NULL;
1032 /* Skeleton for HTTP response, if we should intercept the request */
1033 struct http_response *rsp;
1035 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1036 struct list header_list;
1037 struct list *headers = &header_list;
1042 * Read the client's request. Note that since we're not using select() we
1043 * could get blocked here if a client connected, then didn't say anything!
1048 len = read_socket(csp->cfd, buf, sizeof(buf));
1050 if (len <= 0) break; /* error! */
1053 * If there is no memory left for buffering the
1054 * request, there is nothing we can do but hang up
1056 if (add_to_iob(csp, buf, len))
1061 req = get_header(csp);
1065 break; /* no HTTP request! */
1070 continue; /* more to come! */
1074 * If it's a FTP or gopher request, we don't support it.
1076 * These checks are better than nothing, but they might
1077 * not work in all configurations and some clients might
1078 * have problems digesting the answer.
1080 * They should, however, never cause more problems than
1081 * Privoxy's old behaviour (returning the misleading HTML error message:
1082 * "Could not resolve http://(ftp|gopher)://example.org").
1084 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1086 if (!strncmpic(req, "GET ftp://", 10))
1088 strcpy(buf, FTP_RESPONSE);
1089 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as FTP proxy: %s",
1090 csp->ip_addr_str, req);
1094 strcpy(buf, GOPHER_RESPONSE);
1095 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as gopher proxy: %s",
1096 csp->ip_addr_str, req);
1098 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1100 write_socket(csp->cfd, buf, strlen(buf));
1101 free_http_request(http);
1105 #ifdef FEATURE_FORCE_LOAD
1106 /* If this request contains the FORCE_PREFIX,
1107 * better get rid of it now and set the force flag --oes
1110 if (strstr(req, FORCE_PREFIX))
1112 strclean(req, FORCE_PREFIX);
1113 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
1114 csp->flags |= CSP_FLAG_FORCED;
1117 #endif /* def FEATURE_FORCE_LOAD */
1119 switch( parse_http_request(req, http, csp) )
1122 log_error(LOG_LEVEL_ERROR, "Out of memory while parsing request.");
1125 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", req);
1133 if (http->cmd == NULL)
1135 strcpy(buf, CHEADER);
1136 write_socket(csp->cfd, buf, strlen(buf));
1138 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
1140 free_http_request(http);
1144 /* grab the rest of the client's headers */
1148 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1150 len = read_socket(csp->cfd, buf, sizeof(buf));
1153 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1158 * If there is no memory left for buffering the
1159 * request, there is nothing we can do but hang up
1161 if (add_to_iob(csp, buf, len))
1168 if (p == NULL) break;
1175 if (http->host == NULL)
1178 * Intercepted or invalid request without domain
1179 * inside the request line. Try to get it another way.
1181 if (JB_ERR_OK == get_destination_from_headers(headers, http))
1183 /* Split the domain we just got for pattern matching */
1184 init_domain_components(http);
1188 /* We can't work without destination. Go spread the news.*/
1190 req = list_to_text(headers);
1192 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, http->cmd);
1193 log_error(LOG_LEVEL_ERROR,
1194 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1195 csp->ip_addr_str, http->cmd, req);
1198 strcpy(buf, MISSING_DESTINATION_RESPONSE);
1199 write_socket(csp->cfd, buf, strlen(buf));
1200 free_http_request(http);
1201 destroy_list(headers);
1205 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1206 * to get the destination IP address, use it as host directly
1207 * or do a reverse DNS lookup first.
1211 /* decide how to route the HTTP request */
1213 if ((fwd = forward_url(http, csp)) == NULL)
1215 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1216 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1219 /* build the http request to send to the server
1220 * we have to do one of the following:
1222 * create = use the original HTTP request to create a new
1223 * HTTP request that has either the path component
1224 * without the http://domainspec (w/path) or the
1225 * full orininal URL (w/url)
1226 * Note that the path and/or the HTTP version may
1227 * have been altered by now.
1229 * connect = Open a socket to the host:port of the server
1230 * and short-circuit server and client socket.
1232 * pass = Pass the request unchanged if forwarding a CONNECT
1233 * request to a parent proxy. Note that we'll be sending
1234 * the CFAIL message ourselves if connecting to the parent
1235 * fails, but we won't send a CSUCCEED message if it works,
1236 * since that would result in a double message (ours and the
1237 * parent's). After sending the request to the parent, we simply
1240 * here's the matrix:
1243 * +--------+--------+
1245 * 0 | create | connect|
1247 * Forwarding +--------+--------+
1249 * 1 | create | pass |
1251 * +--------+--------+
1256 * Determine the actions for this URL
1258 #ifdef FEATURE_TOGGLE
1259 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1261 /* Most compatible set of actions (i.e. none) */
1262 init_current_action(csp->action);
1265 #endif /* ndef FEATURE_TOGGLE */
1267 url_actions(http, csp);
1272 * Check if a CONNECT request is allowable:
1273 * In the absence of a +limit-connect action, allow only port 443.
1274 * If there is an action, allow whatever matches the specificaton.
1278 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
1279 || (csp->action->flags & ACTION_LIMIT_CONNECT
1280 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
1282 if (csp->action->flags & ACTION_TREAT_FORBIDDEN_CONNECTS_LIKE_BLOCKS)
1284 /* The response will violate the specs, but makes unblocking easier. */
1285 log_error(LOG_LEVEL_ERROR, "Marking suspicious CONNECT request from %s for blocking.",
1287 csp->action->flags |= ACTION_BLOCK;
1292 strcpy(buf, CFORBIDDEN);
1293 write_socket(csp->cfd, buf, strlen(buf));
1294 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
1295 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
1303 * Downgrade http version from 1.1 to 1.0 if +downgrade
1306 if ( (http->ssl == 0)
1307 && (!strcmpic(http->ver, "HTTP/1.1"))
1308 && (csp->action->flags & ACTION_DOWNGRADE))
1311 http->ver = strdup("HTTP/1.0");
1313 if (http->ver == NULL)
1315 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1320 * Save a copy of the original request for logging
1322 http->ocmd = strdup(http->cmd);
1324 if (http->ocmd == NULL)
1326 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
1330 * (Re)build the HTTP request for non-SSL requests.
1331 * If forwarding, use the whole URL, else, use only the path.
1337 http->cmd = strdup(http->gpc);
1338 string_append(&http->cmd, " ");
1340 if (fwd->forward_host)
1342 string_append(&http->cmd, http->url);
1346 string_append(&http->cmd, http->path);
1348 string_append(&http->cmd, " ");
1349 string_append(&http->cmd, http->ver);
1351 if (http->cmd == NULL)
1353 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1355 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", http->cmd);
1357 enlist(csp->headers, http->cmd);
1359 /* Append the previously read headers */
1360 list_append_list_unique(csp->headers, headers);
1361 destroy_list(headers);
1364 * If the user has not supplied any wafers, and the user has not
1365 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1367 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1368 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1370 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1374 #ifdef FEATURE_KILL_POPUPS
1375 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
1376 #endif /* def FEATURE_KILL_POPUPS */
1378 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
1379 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
1381 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
1383 jpeg_inspect = ((csp->action->flags & ACTION_JPEG_INSPECT) != 0);
1386 * We have a request. Now, check to see if we need to
1387 * intercept it, i.e. If ..
1391 /* We may not forward the request by rfc2616 sect 14.31 */
1392 (NULL != (rsp = direct_response(csp)))
1394 /* or we are enabled and... */
1395 || (IS_ENABLED_AND (
1397 /* ..the request was blocked */
1398 ( NULL != (rsp = block_url(csp)))
1400 /* ..or untrusted */
1401 #ifdef FEATURE_TRUST
1402 || ( NULL != (rsp = trust_url(csp)))
1403 #endif /* def FEATURE_TRUST */
1405 /* ..or a redirect kicked in */
1406 || ( NULL != (rsp = redirect_url(csp)))
1410 * .. or a CGI call was detected and answered.
1412 * This check comes last to give the user the power
1413 * to deny acces to some (or all) of the cgi pages.
1415 || (NULL != (rsp = dispatch_cgi(csp)))
1419 /* Write the answer to the client */
1420 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1421 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1423 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1426 #ifdef FEATURE_STATISTICS
1427 /* Count as a rejected request */
1428 csp->flags |= CSP_FLAG_REJECTED;
1429 #endif /* def FEATURE_STATISTICS */
1431 /* Log (FIXME: All intercept reasons appear as "crunch" with Status 200) */
1432 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
1433 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
1435 /* Clean up and return */
1436 free_http_response(rsp);
1440 hdr = sed(client_patterns, add_client_headers, csp);
1443 /* FIXME Should handle error properly */
1444 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1447 list_remove_all(csp->headers);
1449 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1451 if (fwd->forward_host)
1453 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1454 fwd->forward_host, fwd->forward_port, http->hostport);
1458 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1461 /* here we connect to the server, gateway, or the forwarder */
1463 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
1464 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
1466 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
1467 forwarded_connect_retries, http->hostport);
1470 if (csp->sfd == JB_INVALID_SOCKET)
1472 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1475 if (errno == EINVAL)
1477 rsp = error_response(csp, "no-such-domain", errno);
1479 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
1480 csp->ip_addr_str, http->ocmd);
1484 rsp = error_response(csp, "connect-failed", errno);
1486 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1487 csp->ip_addr_str, http->ocmd);
1491 /* Write the answer to the client */
1494 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1495 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1497 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1501 free_http_response(rsp);
1506 log_error(LOG_LEVEL_CONNECT, "OK");
1508 if (fwd->forward_host || (http->ssl == 0))
1510 /* write the client's (modified) header to the server
1511 * (along with anything else that may be in the buffer)
1514 if (write_socket(csp->sfd, hdr, strlen(hdr))
1515 || (flush_socket(csp->sfd, csp) < 0))
1517 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1520 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1521 csp->ip_addr_str, http->ocmd);
1523 rsp = error_response(csp, "connect-failed", errno);
1527 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1528 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1530 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1534 free_http_response(rsp);
1542 * We're running an SSL tunnel and we're not forwarding,
1543 * so just send the "connect succeeded" message to the
1544 * client, flush the rest, and get out of the way.
1546 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1547 csp->ip_addr_str, http->ocmd);
1549 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
1557 /* we're finished with the client's header */
1560 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1562 /* pass data between the client and server
1563 * until one or the other shuts down the connection.
1572 * FD_ZERO here seems to point to an errant macro which crashes.
1573 * So do this by hand for now...
1575 memset(&rfds,0x00,sizeof(fd_set));
1579 FD_SET(csp->cfd, &rfds);
1580 FD_SET(csp->sfd, &rfds);
1582 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
1586 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1590 /* this is the body of the browser's request
1591 * just read it and write it.
1594 if (FD_ISSET(csp->cfd, &rfds))
1596 len = read_socket(csp->cfd, buf, sizeof(buf));
1600 break; /* "game over, man" */
1603 if (write_socket(csp->sfd, buf, (size_t)len))
1605 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1612 * The server wants to talk. It could be the header or the body.
1613 * If `hdr' is null, then it's the header otherwise it's the body.
1614 * FIXME: Does `hdr' really mean `host'? No.
1618 if (FD_ISSET(csp->sfd, &rfds))
1621 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1625 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1627 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1628 csp->ip_addr_str, http->ocmd);
1630 rsp = error_response(csp, "connect-failed", errno);
1634 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1635 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1637 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1641 free_http_response(rsp);
1645 /* Add a trailing zero. This lets filter_popups
1646 * use string operations.
1650 #ifdef FEATURE_KILL_POPUPS
1651 /* Filter the popups on this read. */
1652 if (block_popups_now)
1654 filter_popups(buf, csp);
1656 #endif /* def FEATURE_KILL_POPUPS */
1658 /* Normally, this would indicate that we've read
1659 * as much as the server has sent us and we can
1660 * close the client connection. However, Microsoft
1661 * in its wisdom has released IIS/5 with a bug that
1662 * prevents it from sending the trailing \r\n in
1663 * a 302 redirect header (and possibly other headers).
1664 * To work around this if we've haven't parsed
1665 * a full header we'll append a trailing \r\n
1666 * and see if this now generates a valid one.
1668 * This hack shouldn't have any impacts. If we've
1669 * already transmitted the header or if this is a
1670 * SSL connection, then we won't bother with this
1671 * hack. So we only work on partially received
1672 * headers. If we append a \r\n and this still
1673 * doesn't generate a valid header, then we won't
1674 * transmit anything to the client.
1679 if (server_body || http->ssl)
1682 * If we have been buffering up the document,
1683 * now is the time to apply content modification
1684 * and send the result to the client.
1689 * If the content filter fails, use the original
1690 * buffer and length.
1691 * (see p != NULL ? p : csp->iob->cur below)
1693 if (NULL == (p = (*content_filter)(csp)))
1695 csp->content_length = csp->iob->eod - csp->iob->cur;
1698 hdr = sed(server_patterns_light, NULL, csp);
1702 /* FIXME Should handle error properly */
1703 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1706 if (write_socket(csp->cfd, hdr, strlen(hdr))
1707 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
1709 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1719 break; /* "game over, man" */
1723 * This is NOT the body, so
1724 * Let's pretend the server just sent us a blank line.
1726 len = sprintf(buf, "\r\n");
1729 * Now, let the normal header parsing algorithm below do its
1730 * job. If it fails, we'll exit instead of continuing.
1737 * If this is an SSL connection or we're in the body
1738 * of the server document, just write it to the client,
1739 * unless we need to buffer the body for later content-filtering
1742 if (server_body || http->ssl)
1747 * If there is no memory left for buffering the content, or the buffer limit
1748 * has been reached, switch to non-filtering mode, i.e. make & write the
1749 * header, flush the iob and buf, and get out of the way.
1751 if (add_to_iob(csp, buf, len))
1756 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
1758 hdr = sed(server_patterns, add_server_headers, csp);
1762 * Memory is too tight to even generate the header.
1763 * Send our static "Out-of-memory" page.
1765 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
1766 rsp = cgi_error_memory();
1768 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1769 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1771 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1776 hdrlen = strlen(hdr);
1778 if (write_socket(csp->cfd, hdr, hdrlen)
1779 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
1780 || (write_socket(csp->cfd, buf, (size_t) len)))
1782 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
1788 byte_count += hdrlen + flushed + len;
1790 content_filter = NULL;
1797 if (write_socket(csp->cfd, buf, (size_t)len))
1799 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
1808 /* we're still looking for the end of the
1809 * server's header ... (does that make header
1810 * parsing an "out of body experience" ?
1814 * buffer up the data we just read. If that fails,
1815 * there's little we can do but send our static
1816 * out-of-memory page.
1818 if (add_to_iob(csp, buf, len))
1820 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
1821 rsp = cgi_error_memory();
1823 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1824 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1826 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1831 /* get header lines from the iob */
1833 while ((p = get_header(csp)) != NULL)
1837 /* see following note */
1840 enlist(csp->headers, p);
1844 /* NOTE: there are no "empty" headers so
1845 * if the pointer `p' is not NULL we must
1846 * assume that we reached the end of the
1847 * buffer before we hit the end of the header.
1854 /* Well, we tried our MS IIS/5
1855 * hack and it didn't work.
1856 * The header is incomplete
1857 * and there isn't anything
1858 * we can do about it.
1864 /* Since we have to wait for
1865 * more from the server before
1866 * we can parse the headers
1867 * we just continue here.
1873 /* we have now received the entire header.
1874 * filter it and send the result to the client
1877 hdr = sed(server_patterns, add_server_headers, csp);
1880 /* FIXME Should handle error properly */
1881 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1884 #ifdef FEATURE_KILL_POPUPS
1885 /* Start blocking popups if appropriate. */
1887 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1888 !http->ssl && /* We talk plaintext */
1889 block_popups) /* Policy allows */
1891 block_popups_now = 1;
1893 * Filter the part of the body that came in the same read
1894 * as the last headers:
1896 filter_popups(csp->iob->cur, csp);
1899 #endif /* def FEATURE_KILL_POPUPS */
1901 /* Buffer and pcrs filter this if appropriate. */
1903 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1904 !http->ssl && /* We talk plaintext */
1905 pcrs_filter) /* Policy allows */
1907 content_filter = pcrs_filter_response;
1910 /* Buffer and gif_deanimate this if appropriate. */
1912 if ((csp->content_type & CT_GIF) && /* It's an image/gif MIME-Type */
1913 !http->ssl && /* We talk plaintext */
1914 gif_deanimate) /* Policy allows */
1916 content_filter = gif_deanimate_response;
1919 /* Buffer and jpg_inspect this if appropriate. */
1921 if ((csp->content_type & CT_JPEG) && /* It's an image/jpeg MIME-Type */
1922 !http->ssl && /* We talk plaintext */
1923 jpeg_inspect) /* Policy allows */
1925 content_filter = jpeg_inspect_response;
1929 * Only write if we're not buffering for content modification
1931 if (!content_filter)
1933 /* write the server's (modified) header to
1934 * the client (along with anything else that
1935 * may be in the buffer)
1938 if (write_socket(csp->cfd, hdr, strlen(hdr))
1939 || ((len = flush_socket(csp->cfd, csp)) < 0))
1941 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1943 /* the write failed, so don't bother
1944 * mentioning it to the client...
1945 * it probably can't hear us anyway.
1954 /* we're finished with the server's header */
1959 /* If this was a MS IIS/5 hack then it means
1960 * the server has already closed the
1961 * connection. Nothing more to read. Time
1972 return; /* huh? we should never get here */
1975 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
1976 csp->ip_addr_str, http->ocmd, byte_count);
1980 /*********************************************************************
1984 * Description : This is little more than chat. We only "serve" to
1985 * to close any socket that chat may have opened.
1988 * 1 : csp = Current client state (buffers, headers, etc...)
1992 *********************************************************************/
1994 void serve(struct client_state *csp)
1995 #else /* ifndef AMIGA */
1996 static void serve(struct client_state *csp)
1997 #endif /* def AMIGA */
2000 close_socket(csp->cfd);
2002 if (csp->sfd != JB_INVALID_SOCKET)
2004 close_socket(csp->sfd);
2007 csp->flags &= ~CSP_FLAG_ACTIVE;
2013 /*********************************************************************
2015 * Function : server_thread
2017 * Description : We only exist to call `serve' in a threaded environment.
2020 * 1 : data = Current client state (buffers, headers, etc...)
2022 * Returns : Always 0.
2024 *********************************************************************/
2025 static int32 server_thread(void *data)
2027 serve((struct client_state *) data);
2034 /*********************************************************************
2038 * Description : Print usage info & exit.
2040 * Parameters : Pointer to argv[0] for identifying ourselves
2044 *********************************************************************/
2045 void usage(const char *myname)
2047 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
2049 "Usage: %s [--help] [--version] [configfile]\n"
2051 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
2053 "Aborting.\n", myname);
2060 /*********************************************************************
2064 * Description : Load the config file and start the listen loop.
2065 * This function is a lot more *sane* with the `load_config'
2066 * and `listen_loop' functions; although it stills does
2067 * a *little* too much for my taste.
2070 * 1 : argc = Number of parameters (including $0).
2071 * 2 : argv = Array of (char *)'s to the parameters.
2073 * Returns : 1 if : can't open config file, unrecognized directive,
2074 * stats requested in multi-thread mode, can't open the
2075 * log file, can't open the jar file, listen port is invalid,
2076 * any load fails, and can't bind port.
2078 * Else main never returns, the process must be signaled
2079 * to terminate execution. Or, on Windows, use the
2080 * "File", "Exit" menu option.
2082 *********************************************************************/
2084 int real_main(int argc, const char *argv[])
2086 int main(int argc, const char *argv[])
2090 unsigned int random_seed;
2092 struct passwd *pw = NULL;
2093 struct group *grp = NULL;
2102 #if !defined(_WIN32)
2110 * Parse the command line arguments
2112 while (++argc_pos < argc)
2115 /* Check to see if the service must be installed or uninstalled */
2116 if (strncmp(argv[argc_pos], "--install", 9) == 0)
2118 const char *pName = argv[argc_pos] + 9;
2121 exit( (install_service(pName)) ? 0 : 1 );
2123 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
2125 const char *pName = argv[argc_pos] + 11;
2128 exit((uninstall_service(pName)) ? 0 : 1);
2130 else if (strcmp(argv[argc_pos], "--service" ) == 0)
2132 bRunAsService = TRUE;
2133 w32_set_service_cwd();
2134 atexit(w32_service_exit_notify);
2137 #endif /* defined(_WIN32) */
2140 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2142 if (strcmp(argv[argc_pos], "--help") == 0)
2147 else if(strcmp(argv[argc_pos], "--version") == 0)
2149 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
2155 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
2160 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
2162 if (++argc_pos == argc) usage(argv[0]);
2163 pidfile = strdup(argv[argc_pos]);
2166 else if (strcmp(argv[argc_pos], "--user" ) == 0)
2168 if (++argc_pos == argc) usage(argv[argc_pos]);
2170 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
2173 if (NULL == (grp = getgrnam(p)))
2175 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
2179 if (NULL == (pw = getpwnam(argv[argc_pos])))
2181 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
2184 if (p != NULL) *--p = '\0';
2187 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
2192 #endif /* defined(unix) */
2193 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
2195 configfile = argv[argc_pos];
2198 } /* -END- while (more arguments) */
2201 if ( *configfile != '/' )
2203 char *abs_file, cwd[1024];
2205 /* make config-filename absolute here */
2206 if ( !(getcwd(cwd, sizeof(cwd))))
2208 perror("get working dir failed");
2212 if (!(basedir = strdup(cwd))
2213 || (!(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))))
2215 perror("malloc failed");
2218 strcpy( abs_file, basedir );
2219 strcat( abs_file, "/" );
2220 strcat( abs_file, configfile );
2221 configfile = abs_file;
2223 #endif /* defined unix */
2227 clients->next = NULL;
2231 #elif defined(_WIN32)
2235 #ifdef FEATURE_PTHREAD
2237 * Prepare global mutex semaphores
2239 pthread_mutex_init(&log_mutex,0);
2240 pthread_mutex_init(&log_init_mutex,0);
2242 #ifndef HAVE_GMTIME_R
2243 pthread_mutex_init(&gmtime_mutex,0);
2244 #endif /* ndef HAVE_GMTIME_R */
2246 #ifndef HAVE_LOCALTIME_R
2247 pthread_mutex_init(&localtime_mutex,0);
2248 #endif /* ndef HAVE_GMTIME_R */
2250 #ifndef HAVE_GETHOSTBYADDR_R
2251 pthread_mutex_init(&gethostbyaddr_mutex,0);
2252 #endif /* ndef HAVE_GETHOSTBYADDR_R */
2254 #ifndef HAVE_GETHOSTBYNAME_R
2255 pthread_mutex_init(&gethostbyname_mutex,0);
2256 #endif /* ndef HAVE_GETHOSTBYNAME_R */
2259 pthread_mutex_init(&rand_mutex,0);
2260 #endif /* ndef HAVE_RANDOM */
2262 #endif /* FEATURE_PTHREAD */
2264 random_seed = (int)time(NULL);
2266 srandom(random_seed);
2269 #endif /* ifdef HAVE_RANDOM */
2272 * Unix signal handling
2274 * Catch the abort, interrupt and terminate signals for a graceful exit
2275 * Catch the hangup signal so the errlog can be reopened.
2276 * Ignore the broken pipe signals (FIXME: Why?)
2278 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
2281 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
2282 const int ignored_signals[] = { SIGPIPE, 0 };
2284 for (idx = 0; catched_signals[idx] != 0; idx++)
2286 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
2287 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
2289 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
2290 #endif /* ifdef sun */
2292 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
2296 for (idx = 0; ignored_signals[idx] != 0; idx++)
2298 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
2300 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
2305 #else /* ifdef _WIN32 */
2306 # ifdef _WIN_CONSOLE
2308 * We *are* in a windows console app.
2309 * Print a verbose messages about FAQ's and such
2311 printf(win32_blurb);
2312 # endif /* def _WIN_CONSOLE */
2313 #endif /* def _WIN32 */
2316 /* Initialize the CGI subsystem */
2317 cgi_init_error_messages();
2320 * If runnig on unix and without the --nodaemon
2321 * option, become a daemon. I.e. fork, detach
2322 * from tty and get process group leadership
2335 if ( pid < 0 ) /* error */
2340 else if ( pid != 0 ) /* parent */
2345 * must check for errors
2346 * child died due to missing files aso
2349 wpid = waitpid( pid, &status, WNOHANG );
2358 /* Should be more portable, but not as well tested */
2363 #else /* ndef __FreeBSD__ */
2365 #endif /* ndef __FreeBSD__ */
2366 fd = open("/dev/tty", O_RDONLY);
2369 /* no error check here */
2370 ioctl( fd, TIOCNOTTY,0 );
2374 /* FIXME: should close stderr (fd 2) here too, but the test
2376 * and load config file is done in listen_loop() and puts
2377 * some messages on stderr there.
2384 } /* -END- if (!no_daemon) */
2387 * As soon as we have written the PID file, we can switch
2388 * to the user and group ID indicated by the --user option
2394 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
2396 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
2402 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
2404 if (chroot(pw->pw_dir) < 0)
2406 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
2410 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
2413 if (setuid(pw->pw_uid))
2415 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
2419 char putenv_dummy[64];
2421 strcpy(putenv_dummy, "HOME=/");
2422 if (putenv(putenv_dummy) != 0)
2424 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
2427 snprintf(putenv_dummy, 64, "USER=%s", pw->pw_name);
2428 if (putenv(putenv_dummy) != 0)
2430 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
2436 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
2439 #endif /* defined unix */
2442 /* This will be FALSE unless the command line specified --service
2446 /* Yup, so now we must attempt to establish a connection
2447 * with the service dispatcher. This will only work if this
2448 * process was launched by the service control manager to
2449 * actually run as a service. If this isn't the case, i've
2450 * known it take around 30 seconds or so for the call to return.
2453 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
2454 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
2456 /* Service has run, and at this point is now being stopped, so just return */
2461 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
2463 /* An error occurred. Usually it's because --service was wrongly specified
2464 * and we were unable to connect to the Service Control Dispatcher because
2465 * it wasn't expecting us and is therefore not listening.
2467 * For now, just continue below to call the listen_loop function.
2470 #endif /* def _WIN32 */
2480 /*********************************************************************
2482 * Function : bind_port_helper
2484 * Description : Bind the listen port. Handles logging, and aborts
2488 * 1 : config = Privoxy configuration. Specifies port
2491 * Returns : Port that was opened.
2493 *********************************************************************/
2494 static jb_socket bind_port_helper(struct configuration_spec * config)
2499 if ( (config->haddr != NULL)
2500 && (config->haddr[0] == '1')
2501 && (config->haddr[1] == '2')
2502 && (config->haddr[2] == '7')
2503 && (config->haddr[3] == '.') )
2505 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
2508 else if (config->haddr == NULL)
2510 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
2515 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
2516 config->hport, config->haddr);
2519 result = bind_port(config->haddr, config->hport, &bfd);
2526 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2527 "There may be another Privoxy or some other "
2528 "proxy running on port %d",
2529 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
2530 config->hport, config->hport);
2533 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2534 "The hostname is not resolvable",
2535 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2538 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
2539 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2542 /* shouldn't get here */
2543 return JB_INVALID_SOCKET;
2546 config->need_bind = 0;
2553 /* Without this simple workaround we get this compiler warning from _beginthread
2554 * warning C4028: formal parameter 1 different from declaration
2556 void w32_service_listen_loop(void *p)
2560 #endif /* def _WIN32 */
2563 /*********************************************************************
2565 * Function : listen_loop
2567 * Description : bind the listen port and enter a "FOREVER" listening loop.
2573 *********************************************************************/
2574 static void listen_loop(void)
2576 struct client_state *csp = NULL;
2578 struct configuration_spec * config;
2580 config = load_config();
2582 bfd = bind_port_helper(config);
2584 #ifdef FEATURE_GRACEFUL_TERMINATION
2585 while (!g_terminate)
2590 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
2591 while (waitpid(-1, NULL, WNOHANG) > 0)
2593 /* zombie children */
2595 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
2598 * Free data that was used by died threads
2604 * Re-open the errlog after HUP signal
2606 if (received_hup_signal)
2608 init_error_log(Argv[0], config->logfile, config->debug);
2609 received_hup_signal = 0;
2614 #ifdef FEATURE_COOKIE_JAR
2616 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
2617 * already open. I think unload_configfile() is not being run, which should do
2618 * this work. Until that can get resolved, we'll use this workaround.
2622 if (csp->config->jar)
2624 fclose(csp->config->jar);
2625 csp->config->jar = NULL;
2627 #endif /* FEATURE_COOKIE_JAR */
2628 #endif /* __OS2__ */
2630 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
2632 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
2636 csp->flags |= CSP_FLAG_ACTIVE;
2637 csp->sfd = JB_INVALID_SOCKET;
2639 csp->config = config = load_config();
2641 if ( config->need_bind )
2644 * Since we were listening to the "old port", we will not see
2645 * a "listen" param change until the next IJB request. So, at
2646 * least 1 more request must be made for us to find the new
2647 * setting. I am simply closing the old socket and binding the
2650 * Which-ever is correct, we will serve 1 more page via the
2651 * old settings. This should probably be a "show-proxy-args"
2652 * request. This should not be a so common of an operation
2653 * that this will hurt people's feelings.
2658 bfd = bind_port_helper(config);
2661 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
2663 if (!accept_connection(csp, bfd))
2665 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
2678 log_error(LOG_LEVEL_CONNECT, "OK");
2681 #ifdef FEATURE_TOGGLE
2682 if (global_toggle_state)
2684 csp->flags |= CSP_FLAG_TOGGLED_ON;
2686 #endif /* def FEATURE_TOGGLE */
2688 if (run_loader(csp))
2690 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
2691 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2695 if (block_acl(NULL,csp))
2697 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
2698 close_socket(csp->cfd);
2702 #endif /* def FEATURE_ACL */
2704 /* add it to the list of clients */
2705 csp->next = clients->next;
2706 clients->next = csp;
2708 if (config->multi_threaded)
2712 /* this is a switch () statment in the C preprocessor - ugh */
2713 #undef SELECTED_ONE_OPTION
2715 /* Use Pthreads in preference to native code */
2716 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
2717 #define SELECTED_ONE_OPTION
2719 pthread_t the_thread;
2720 pthread_attr_t attrs;
2722 pthread_attr_init(&attrs);
2723 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
2724 errno = pthread_create(&the_thread, &attrs,
2725 (void * (*)(void *))serve, csp);
2726 child_id = errno ? -1 : 0;
2727 pthread_attr_destroy(&attrs);
2731 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
2732 #define SELECTED_ONE_OPTION
2733 child_id = _beginthread(
2734 (void (*)(void *))serve,
2739 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
2740 #define SELECTED_ONE_OPTION
2741 child_id = _beginthread(
2742 (void(* _Optlink)(void*))serve,
2748 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
2749 #define SELECTED_ONE_OPTION
2751 thread_id tid = spawn_thread
2752 (server_thread, "server", B_NORMAL_PRIORITY, csp);
2754 if ((tid >= 0) && (resume_thread(tid) == B_OK))
2756 child_id = (int) tid;
2765 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2766 #define SELECTED_ONE_OPTION
2767 csp->cfd = ReleaseSocket(csp->cfd, -1);
2769 if((child_id = (int)CreateNewProcTags(
2770 NP_Entry, (ULONG)server_thread,
2771 NP_Output, Output(),
2772 NP_CloseOutput, FALSE,
2773 NP_Name, (ULONG)"privoxy child",
2774 NP_StackSize, 200*1024,
2778 ((struct Task *)child_id)->tc_UserData = csp;
2779 Signal((struct Task *)child_id, SIGF_SINGLE);
2784 #if !defined(SELECTED_ONE_OPTION)
2787 /* This block is only needed when using fork().
2788 * When using threads, the server thread was
2789 * created and run by the call to _beginthread().
2791 if (child_id == 0) /* child */
2794 #ifdef FEATURE_TOGGLE
2795 int inherited_toggle_state = global_toggle_state;
2796 #endif /* def FEATURE_TOGGLE */
2801 * If we've been toggled or we've blocked the request, tell Mom
2804 #ifdef FEATURE_TOGGLE
2805 if (inherited_toggle_state != global_toggle_state)
2807 rc |= RC_FLAG_TOGGLED;
2809 #endif /* def FEATURE_TOGGLE */
2811 #ifdef FEATURE_STATISTICS
2812 if (csp->flags & CSP_FLAG_REJECTED)
2814 rc |= RC_FLAG_BLOCKED;
2816 #endif /* ndef FEATURE_STATISTICS */
2820 else if (child_id > 0) /* parent */
2822 /* in a fork()'d environment, the parent's
2823 * copy of the client socket and the CSP
2827 #if !defined(_WIN32) && !defined(__CYGWIN__)
2829 wait( &child_status );
2832 * Evaluate child's return code: If the child has
2833 * - been toggled, toggle ourselves
2834 * - blocked its request, bump up the stats counter
2837 #ifdef FEATURE_TOGGLE
2838 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
2840 global_toggle_state = !global_toggle_state;
2842 #endif /* def FEATURE_TOGGLE */
2844 #ifdef FEATURE_STATISTICS
2846 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
2850 #endif /* def FEATURE_STATISTICS */
2852 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
2853 close_socket(csp->cfd);
2854 csp->flags &= ~CSP_FLAG_ACTIVE;
2858 #undef SELECTED_ONE_OPTION
2859 /* end of cpp switch () */
2861 if (child_id < 0) /* failed */
2863 char buf[BUFFER_SIZE];
2865 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
2867 sprintf(buf , "Privoxy: can't fork: errno = %d", errno);
2869 write_socket(csp->cfd, buf, strlen(buf));
2870 close_socket(csp->cfd);
2871 csp->flags &= ~CSP_FLAG_ACTIVE;
2882 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
2884 /* Clean up. Aim: free all memory (no leaks) */
2885 #ifdef FEATURE_GRACEFUL_TERMINATION
2887 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
2889 unload_current_config_file();
2890 unload_current_actions_file();
2891 unload_current_re_filterfile();
2892 #ifdef FEATURE_TRUST
2893 unload_current_trust_file();
2896 if (config->multi_threaded)
2903 } while ((clients->next != NULL) && (--i > 0));
2907 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
2918 #ifdef FEATURE_COOKIE_JAR
2919 if (NULL != config->jar)
2921 fclose(config->jar);
2925 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
2926 /* Cleanup - remove taskbar icon etc. */
2931 #endif /* FEATURE_GRACEFUL_TERMINATION */