1 const char jcc_rcs[] = "$Id: jcc.c,v 1.115 2006/12/29 17:38:57 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 1.115 2006/12/29 17:38:57 fabiankeil
37 * Fixed gcc43 conversion warnings.
39 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
40 * Fix -pedantic ISO C warning about converting
41 * from function pointer to object pointer.
43 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
44 * Silence compiler warning I introduced with my last commit.
46 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
47 * Mutex protect rand() if POSIX threading
48 * is used, warn the user if that's not possible
49 * and stop using it on _WIN32 where it could
52 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
53 * Don't prevent core dumps by catching SIGABRT.
54 * It's rude and makes debugging unreasonable painful.
56 * Revision 1.110 2006/12/13 14:52:53 etresoft
57 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
59 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
60 * Privoxy is now able to run as intercepting
61 * proxy in combination with any packet filter
62 * that does the port redirection. The destination
63 * is extracted from the "Host:" header which
64 * should be available for nearly all requests.
66 * Moved HTTP snipplets into jcc.c.
67 * Added error message for gopher proxy requests.
69 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
70 * Only unlink the pidfile if it's actually used.
72 * Change order of interception checks to make
73 * it possible to block or redirect requests for
76 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
77 * Make pthread mutex locking more generic. Instead of
78 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
79 * and use mutex locking unless there is an _r function
80 * available. Better safe than sorry.
82 * Fixes "./configure --disable-pthread" and should result
83 * in less threading-related problems on pthread-using platforms,
84 * but it still doesn't fix BR#1122404.
86 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
87 * Move pthread.h inclusion from jcc.c to jcc.h.
88 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
90 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
91 * Don't exit after receiving the second SIGHUP on Solaris.
93 * Fixes BR 1052235, but the same problem may exist on other
94 * systems. Once 3.0.6 is out we should use sigset()
95 * where available and see if it breaks anything.
97 * Revision 1.104 2006/09/23 13:26:38 roro
98 * Replace TABs by spaces in source code.
100 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
101 * Fix +redirect{}. Didn't work with -fast-redirects.
103 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
104 * Respond with 400 and a short text message
105 * if the client tries to use Privoxy as FTP proxy.
107 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
108 * Make number of retries in case of forwarded-connect problems
109 * a config file option (forwarded-connect-retries) and use 0 as
112 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
113 * Set random(3) seed.
115 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
116 * Follow the OpenBSD port's lead and protect the resolve
117 * functions on OpenBSD as well.
119 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
120 * --user fix. Only use the user as group if no group is specified.
121 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
123 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
124 * Windows service (re-)integration
128 * --install[:service_name]
129 * --uninstall[:service_name]
132 * They work as follows:
133 * --install will create a service for you and then terminate.
134 * By default the service name will be "privoxy" (without the quotes).
135 * However you can run multiple services if you wish, just by adding
136 * a colon and then a name (no spaces).
138 * --uninstall follows the exact same rules a --install.
140 * --service is used when the program is executed by the service
141 * control manager, and in normal circumstances would never be
142 * used as a command line argument.
144 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
145 * Windows service integration
147 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
148 * Incorporate Fabian Keil's patch work:
149 http://www.fabiankeil.de/sourcecode/privoxy/
151 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
152 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
153 * with what was really the latest development (the v_3_0_branch branch)
155 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
156 * Thanks to Jindrich Makovicka for a race condition fix for the log
157 * file. The race condition remains for non-pthread implementations.
158 * Reference patch #1175720.
160 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
161 * Add the ability to check jpeg images for invalid
162 * lengths of comment blocks. Defensive strategy
163 * against the exploit:
164 * Microsoft Security Bulletin MS04-028
165 * Buffer Overrun in JPEG Processing (GDI+) Could
166 * Allow Code Execution (833987)
167 * Enabled with +inspect-jpegs in actions files.
169 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
170 * - Fixed usage info for non-unix platforms
171 * - Fixed small cmdline parsing bug
173 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
174 * Diagnostics: Now preserve the returncode of pthread_create
175 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
177 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
178 * No longer ignore SIGCHLD. Fixes bug #769381
180 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
181 * Close jarfile on graceful exit, remove stray line
183 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
184 * Cosmetics: Killed a warning, a typo and an allocation left at exit
186 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
187 * No longer rely on non-POSIX.1 extensions of getcwd().
190 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
191 * Replaced setenv() by posix-compliant putenv()
192 * Thanks to Neil McCalden (nmcc AT users.sf.net).
194 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
195 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
197 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
198 * Clean-up and extension of improvements for forked mode:
199 * - Child's return code now consists of flags RC_FLAG_*
200 * - Reporting toggle to parent now properly #ifdef'ed
201 * - Children now report blocking to parent. This enables
202 * statistics in forked mode
204 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
205 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
206 * Children now report having been toggled through _exit(17), parents
207 * watch for that code and toggle themselves if found.
209 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
210 * Wrapping all *_r functions (the non-_r versions of them) with
211 * mutex semaphores for OSX. Hopefully this will take care of all
212 * of those pesky crash reports.
214 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
215 * Fixed two mostly harmless mem leaks
217 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
218 * Fix: Head of global clients list now initialized to NULL
220 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
221 * Added basic support for OPTIONS and TRACE HTTP methods:
222 * - New interceptor direct_response() added in chat().
223 * - sed() moved to earlier in the process, so that the
224 * Host: header is evaluated before actions and forwarding
227 * Revision 1.92 2002/05/08 16:00:46 oes
228 * Chat's buffer handling:
229 * - Fixed bug with unchecked out-of-mem conditions
230 * while reading client request & server headers
231 * - No longer predict if the buffer limit will be exceeded
232 * in the next read -- check add_to_iob's new
233 * return code. If buffer couldn't be extended
234 * (policy or out-of-mem) while
235 * - reading from client: abort
236 * - reading server headers: send error page
237 * - buffering server body for filter: flush,
238 * and if that fails: send error page
240 * Revision 1.91 2002/04/08 20:35:58 swa
243 * Revision 1.90 2002/04/02 14:57:28 oes
244 * Made sending wafers independent of FEATURE_COOKIE_JAR
246 * Revision 1.89 2002/03/31 17:18:59 jongfoster
247 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
249 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
250 * More compiler warning message maintenance
252 * Revision 1.87 2002/03/26 22:29:54 swa
253 * we have a new homepage!
255 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
256 * Workaround for closing the jarfile before load_config() comes around again
258 * Revision 1.85 2002/03/24 15:23:33 jongfoster
261 * Revision 1.84 2002/03/24 13:25:43 swa
262 * name change related issues
264 * Revision 1.83 2002/03/16 23:54:06 jongfoster
265 * Adding graceful termination feature, to help look for memory leaks.
266 * If you enable this (which, by design, has to be done by hand
267 * editing config.h) and then go to http://i.j.b/die, then the program
268 * will exit cleanly after the *next* request. It should free all the
269 * memory that was used.
271 * Revision 1.82 2002/03/13 00:27:05 jongfoster
274 * Revision 1.81 2002/03/12 01:42:50 oes
275 * Introduced modular filters
277 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
278 * OS/2 port maintenance:
279 * - Fixed EMX build - it had decayed a little
280 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
281 * substituted a memset for now.
283 * Revision 1.79 2002/03/09 20:03:52 jongfoster
284 * - Making various functions return int rather than size_t.
285 * (Undoing a recent change). Since size_t is unsigned on
286 * Windows, functions like read_socket that return -1 on
287 * error cannot return a size_t.
289 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
290 * crashes, and also frequently caused JB to jump to 100%
291 * CPU and stay there. (Because it thought it had just
292 * read ((unsigned)-1) == 4Gb of data...)
294 * - The signature of write_socket has changed, it now simply
295 * returns success=0/failure=nonzero.
297 * - Trying to get rid of a few warnings --with-debug on
298 * Windows, I've introduced a new type "jb_socket". This is
299 * used for the socket file descriptors. On Windows, this
300 * is SOCKET (a typedef for unsigned). Everywhere else, it's
301 * an int. The error value can't be -1 any more, so it's
302 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
303 * Windows it maps to the #define INVALID_SOCKET.)
305 * - The signature of bind_port has changed.
307 * Revision 1.78 2002/03/08 21:35:04 oes
308 * Added optional group supplement to --user option. Will now use default group of user if no group given
310 * Revision 1.77 2002/03/07 03:52:06 oes
311 * - Fixed compiler warnings etc
312 * - Improved handling of failed DNS lookups
314 * Revision 1.76 2002/03/06 22:54:35 jongfoster
315 * Automated function-comment nitpicking.
317 * Revision 1.75 2002/03/06 10:02:19 oes
318 * Fixed stupid bug when --user was not given
320 * Revision 1.74 2002/03/06 00:49:31 jongfoster
321 * Fixing warning on Windows
322 * Making #ifdefs that refer to the same variable consistently
323 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
325 * Revision 1.73 2002/03/05 23:57:30 hal9
326 * Stray character 's' on line 1618 was breaking build.
328 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
329 * - Re-enable OS/2 building after new parms were added
330 * - Fix false out of memory report when resolving CGI templates when no IP
331 * address is available of failed attempt (a la no such domain)
333 * Revision 1.71 2002/03/05 18:13:56 oes
334 * Added --user option
336 * Revision 1.70 2002/03/05 04:52:42 oes
337 * Deleted non-errlog debugging code
339 * Revision 1.69 2002/03/04 23:50:00 jongfoster
340 * Splitting off bind_port() call into bind_port_helper(), with
343 * Revision 1.68 2002/03/04 20:17:32 oes
346 * Revision 1.67 2002/03/04 18:18:57 oes
347 * - Removed _DEBUG mode
348 * - Cleand up cmdline parsing
349 * - Introduced --no-daemon, --pidfile options
350 * - Cleaned up signal handling:
351 * - Terminate cleanly on INT, TERM and ABRT
352 * - Schedule logfile for re-opening on HUP
353 * - Ignore CHLD and PIPE
354 * - Leave the rest with their default handlers
355 * - Uniform handler registration
356 * - Added usage() function
357 * - Played styleguide police
359 * Revision 1.66 2002/03/03 15:06:55 oes
360 * Re-enabled automatic config reloading
362 * Revision 1.65 2002/03/03 14:49:11 oes
363 * Fixed CLF logging: Now uses client's original HTTP request
365 * Revision 1.64 2002/03/03 09:18:03 joergs
366 * Made jumbjuster work on AmigaOS again.
368 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
369 * Clean up a little CRLF unpleasantness that suddenly appeared
371 * Revision 1.62 2002/02/20 23:17:23 jongfoster
372 * Detecting some out-of memory conditions and exiting with a log message.
374 * Revision 1.61 2002/01/17 21:01:52 jongfoster
375 * Moving all our URL and URL pattern parsing code to urlmatch.c.
377 * Revision 1.60 2001/12/30 14:07:32 steudten
378 * - Add signal handling (unix)
379 * - Add SIGHUP handler (unix)
380 * - Add creation of pidfile (unix)
381 * - Add action 'top' in rc file (RH)
382 * - Add entry 'SIGNALS' to manpage
383 * - Add exit message to logfile (unix)
385 * Revision 1.59 2001/12/13 14:07:18 oes
386 * Fixed Bug: 503 error page now sent OK
388 * Revision 1.58 2001/11/30 23:37:24 jongfoster
389 * Renaming the Win32 config file to config.txt - this is almost the
390 * same as the corresponding UNIX name "config"
392 * Revision 1.57 2001/11/16 00:47:43 jongfoster
393 * Changing the tty-disconnection code to use setsid().
395 * Revision 1.56 2001/11/13 20:20:54 jongfoster
396 * Tabs->spaces, fixing a bug with missing {} around an if()
398 * Revision 1.55 2001/11/13 20:14:53 jongfoster
399 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
401 * Revision 1.54 2001/11/07 00:03:14 steudten
402 * Give reliable return value if an error
403 * occurs not just 0 with new daemon mode.
405 * Revision 1.53 2001/11/05 21:41:43 steudten
406 * Add changes to be a real daemon just for unix os.
407 * (change cwd to /, detach from controlling tty, set
408 * process group and session leader to the own process.
410 * Add some fatal-error log message for failed malloc().
411 * Add '-d' if compiled with 'configure --with-debug' to
412 * enable debug output.
414 * Revision 1.52 2001/10/26 20:11:20 jongfoster
415 * Fixing type mismatch
417 * Revision 1.51 2001/10/26 17:38:28 oes
420 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
421 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
422 * threads to call select() simultaneously. So, it's time to do a real, live,
423 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
424 * (native). Both versions will work, but using __OS2__ offers multi-threading.
426 * Revision 1.49 2001/10/23 21:41:35 jongfoster
427 * Added call to initialize the (statically-allocated of course)
428 * "out of memory" CGI response.
430 * Revision 1.48 2001/10/10 19:56:46 jongfoster
431 * Moving some code that wasn't cookie-related out of an #ifdef
434 * Revision 1.47 2001/10/10 16:44:36 oes
435 * Added CONNECT destination port limitation check
437 * Revision 1.46 2001/10/08 15:17:41 oes
438 * Re-enabled SSL forwarding
440 * Revision 1.45 2001/10/07 15:42:11 oes
441 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
443 * Moved downgrading of the HTTP version from parse_http_request to
444 * chat(), since we can't decide if it is necessary before we have
445 * determined the actions for the URL. The HTTP command is now
446 * *always* re-built so the repairs need no longer be special-cased.
448 * filter_popups now gets a csp pointer so it can raise the new
449 * CSP_FLAG_MODIFIED flag.
453 * Added configurable size limit for the IOB. If the IOB grows so
454 * large that the next read would exceed the limit, the header
455 * is generated, and the header & unfiltered buffer are flushed
456 * to the client. Chat then continues in non-buffering,
457 * non-filtering body mode.
459 * Revision 1.44 2001/10/02 18:13:57 oes
462 * Revision 1.43 2001/10/02 15:32:13 oes
463 * Moved generation of hdr
465 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
466 * Cleaning up 2 compiler warnings on OS/2.
468 * Revision 1.41 2001/09/16 17:05:14 jongfoster
469 * Removing unused #include showarg.h
471 * Revision 1.40 2001/09/16 15:41:45 jongfoster
472 * Fixing signed/unsigned comparison warning.
474 * Revision 1.39 2001/09/16 13:21:27 jongfoster
475 * Changes to use new list functions.
477 * Revision 1.38 2001/09/16 13:01:46 jongfoster
478 * Removing redundant function call that zeroed zalloc()'d memory.
480 * Revision 1.37 2001/09/10 11:12:24 oes
481 * Deleted unused variable
483 * Revision 1.36 2001/09/10 10:56:15 oes
484 * Silenced compiler warnings
486 * Revision 1.35 2001/07/31 14:44:22 oes
487 * Deleted unused size parameter from filter_popups()
489 * Revision 1.34 2001/07/30 22:08:36 jongfoster
490 * Tidying up #defines:
491 * - All feature #defines are now of the form FEATURE_xxx
492 * - Permanently turned off WIN_GUI_EDIT
493 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
495 * Revision 1.33 2001/07/29 19:32:00 jongfoster
496 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
498 * Revision 1.32 2001/07/29 18:47:05 jongfoster
499 * Adding missing #include "loadcfg.h"
501 * Revision 1.31 2001/07/29 12:17:48 oes
502 * Applied pthread fix by Paul Lieverse
504 * Revision 1.30 2001/07/25 22:57:13 jongfoster
505 * __BEOS__ no longer overrides FEATURE_PTHREAD.
506 * This is because FEATURE_PTHREAD will soon be widely used, so I
507 * want to keep it simple.
509 * Revision 1.29 2001/07/24 12:47:06 oes
510 * Applied BeOS support update by Eugenia
512 * Revision 1.28 2001/07/23 13:26:12 oes
513 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
515 * Revision 1.27 2001/07/19 19:09:47 haroon
516 * - Added code to take care of the situation where while processing the first
517 * server response (which includes the server header), after finding the end
518 * of the headers we were not looking past the end of the headers for
519 * content modification. I enabled it for filter_popups.
520 * Someone else should look to see if other similar operations should be
521 * done to the discarded portion of the buffer.
523 * Note 2001/07/20: No, the other content modification mechanisms will process
524 * the whole iob later anyway. --oes
526 * Revision 1.26 2001/07/18 12:31:36 oes
529 * Revision 1.25 2001/07/15 19:43:49 jongfoster
530 * Supports POSIX threads.
531 * Also removed some unused #includes.
533 * Revision 1.24 2001/07/13 14:00:40 oes
534 * - Generic content modification scheme:
535 * Each feature has its own applicability flag that is set
536 * from csp->action->flags.
537 * Replaced the "filtering" int flag , by a function pointer
538 * "content_filter" to the function that will do the content
539 * modification. If it is != NULL, the document will be buffered
540 * and processed through *content_filter, which must set
541 * csp->content_length and return a modified copy of the body
542 * or return NULL (on failiure).
543 * - Changed csp->is_text to the more generic bitmap csp->content_type
544 * which can currently take the valued CT_TEXT or CT_GIF
546 * - Removed all #ifdef PCRS
548 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
549 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
550 * the `block_acl' call. This prevents a compilation error when the user
551 * does not wish to use the "ACL" feature.
553 * Revision 1.22 2001/06/29 21:45:41 oes
554 * Indentation, CRLF->LF, Tab-> Space
556 * Revision 1.21 2001/06/29 13:29:36 oes
557 * - Cleaned up, improved comments
558 * - Unified all possible interceptors (CGI,
559 * block, trust, fast_redirect) in one
560 * place, with one (CGI) answer generation
561 * mechansim. Much clearer now.
562 * - Removed the GIF image generation, which
563 * is now done in filters.c:block_url()
564 * - Made error conditions like domain lookup
565 * failiure or (various) problems while talking
566 * to the server use cgi.c:error_response()
567 * instead of generating HTML/HTTP in chat() (yuck!)
568 * - Removed logentry from cancelled commit
570 * Revision 1.20 2001/06/09 10:55:28 jongfoster
571 * Changing BUFSIZ ==> BUFFER_SIZE
573 * Revision 1.19 2001/06/07 23:12:52 jongfoster
574 * Replacing function pointer in struct gateway with a directly
575 * called function forwarded_connect().
576 * Replacing struct gateway with struct forward_spec
578 * Revision 1.18 2001/06/03 19:12:16 oes
579 * introduced new cgi handling
581 * Revision 1.17 2001/06/01 20:07:23 jongfoster
582 * Now uses action +image-blocker{} rather than config->tinygif
584 * Revision 1.16 2001/06/01 18:49:17 jongfoster
585 * Replaced "list_share" with "list" - the tiny memory gain was not
586 * worth the extra complexity.
588 * Revision 1.15 2001/05/31 21:24:47 jongfoster
589 * Changed "permission" to "action" throughout.
590 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
591 * Moved vanilla wafer check into chat(), since we must now
592 * decide whether or not to add it based on the URL.
594 * Revision 1.14 2001/05/29 20:14:01 joergs
595 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
598 * Revision 1.13 2001/05/29 09:50:24 jongfoster
599 * Unified blocklist/imagelist/permissionslist.
600 * File format is still under discussion, but the internal changes
603 * Also modified interceptor behaviour:
604 * - We now intercept all URLs beginning with one of the following
605 * prefixes (and *only* these prefixes):
607 * * http://ijbswa.sf.net/config/
608 * * http://ijbswa.sourceforge.net/config/
609 * - New interceptors "home page" - go to http://i.j.b/ to see it.
610 * - Internal changes so that intercepted and fast redirect pages
611 * are not replaced with an image.
612 * - Interceptors now have the option to send a binary page direct
613 * to the client. (i.e. ijb-send-banner uses this)
614 * - Implemented show-url-info interceptor. (Which is why I needed
615 * the above interceptors changes - a typical URL is
616 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
617 * The previous mechanism would not have intercepted that, and
618 * if it had been intercepted then it then it would have replaced
621 * Revision 1.12 2001/05/27 22:17:04 oes
623 * - re_process_buffer no longer writes the modified buffer
624 * to the client, which was very ugly. It now returns the
625 * buffer, which it is then written by chat.
627 * - content_length now adjusts the Content-Length: header
628 * for modified documents rather than crunch()ing it.
629 * (Length info in csp->content_length, which is 0 for
630 * unmodified documents)
632 * - For this to work, sed() is called twice when filtering.
634 * Revision 1.11 2001/05/26 17:27:53 jongfoster
635 * Added support for CLF and fixed LOG_LEVEL_LOG.
636 * Also did CRLF->LF fix of my previous patch.
638 * Revision 1.10 2001/05/26 15:26:15 jongfoster
639 * ACL feature now provides more security by immediately dropping
640 * connections from untrusted hosts.
642 * Revision 1.9 2001/05/26 00:28:36 jongfoster
643 * Automatic reloading of config file.
644 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
645 * Most of the global variables have been moved to a new
646 * struct configuration_spec, accessed through csp->config->globalname
647 * Most of the globals remaining are used by the Win32 GUI.
649 * Revision 1.8 2001/05/25 22:43:18 jongfoster
650 * Fixing minor memory leak and buffer overflow.
652 * Revision 1.7 2001/05/25 22:34:30 jongfoster
655 * Revision 1.6 2001/05/23 00:13:58 joergs
656 * AmigaOS support fixed.
658 * Revision 1.5 2001/05/22 18:46:04 oes
660 * - Enabled filtering banners by size rather than URL
661 * by adding patterns that replace all standard banner
662 * sizes with the "Junkbuster" gif to the re_filterfile
664 * - Enabled filtering WebBugs by providing a pattern
665 * which kills all 1x1 images
667 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
668 * which is selected by the (nonstandard and therefore
669 * capital) letter 'U' in the option string.
670 * It causes the quantifiers to be ungreedy by default.
671 * Appending a ? turns back to greedy (!).
673 * - Added a new interceptor ijb-send-banner, which
674 * sends back the "Junkbuster" gif. Without imagelist or
675 * MSIE detection support, or if tinygif = 1, or the
676 * URL isn't recognized as an imageurl, a lame HTML
677 * explanation is sent instead.
679 * - Added new feature, which permits blocking remote
680 * script redirects and firing back a local redirect
682 * The feature is conditionally compiled, i.e. it
683 * can be disabled with --disable-fast-redirects,
684 * plus it must be activated by a "fast-redirects"
685 * line in the config file, has its own log level
686 * and of course wants to be displayed by show-proxy-args
687 * Note: Boy, all the #ifdefs in 1001 locations and
688 * all the fumbling with configure.in and acconfig.h
689 * were *way* more work than the feature itself :-(
691 * - Because a generic redirect template was needed for
692 * this, tinygif = 3 now uses the same.
694 * - Moved GIFs, and other static HTTP response templates
699 * - Removed some >400 CRs again (Jon, you really worked
702 * Revision 1.4 2001/05/21 19:34:01 jongfoster
703 * Made failure to bind() a fatal error.
705 * Revision 1.3 2001/05/20 01:21:20 jongfoster
706 * Version 2.9.4 checkin.
707 * - Merged popupfile and cookiefile, and added control over PCRS
708 * filtering, in new "permissionsfile".
709 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
710 * file error you now get a message box (in the Win32 GUI) rather
711 * than the program exiting with no explanation.
712 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
714 * - Removed tabs from "config"
715 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
716 * - Bumped up version number.
718 * Revision 1.2 2001/05/17 22:34:44 oes
719 * - Added hint on GIF char array generation to jcc.c
720 * - Cleaned CRLF's from the sources and related files
721 * - Repaired logging for REF and FRC
723 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
724 * Initial import of version 2.9.3 source tree
727 *********************************************************************/
733 #include <sys/types.h>
741 # ifndef FEATURE_PTHREAD
745 # include <windows.h>
746 # include <process.h>
747 # endif /* ndef FEATURE_PTHREAD */
750 # ifndef _WIN_CONSOLE
752 # endif /* ndef _WIN_CONSOLE */
753 # include "w32svrapi.h"
755 #else /* ifndef _WIN32 */
757 # if !defined (__OS2__)
759 # include <sys/wait.h>
760 # endif /* ndef __OS2__ */
761 # include <sys/time.h>
762 # include <sys/stat.h>
763 # include <sys/ioctl.h>
766 #include <sys/termios.h>
777 # include <socket.h> /* BeOS has select() for sockets only. */
778 # include <OS.h> /* declarations for threads and stuff. */
781 # if defined(__EMX__) || defined(__OS2__)
782 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
787 #define bzero(B,N) memset(B,0x00,n)
802 #include "killpopup.h"
803 #include "miscutil.h"
805 #include "jbsockets.h"
810 #include "urlmatch.h"
812 const char jcc_h_rcs[] = JCC_H_VERSION;
813 const char project_h_rcs[] = PROJECT_H_VERSION;
816 struct client_state clients[1];
817 struct file_list files[1];
819 #ifdef FEATURE_STATISTICS
820 int urls_read = 0; /* total nr of urls read inc rejected */
821 int urls_rejected = 0; /* total nr of urls rejected */
822 #endif /* def FEATURE_STATISTICS */
824 #ifdef FEATURE_GRACEFUL_TERMINATION
828 static void listen_loop(void);
829 static void chat(struct client_state *csp);
831 void serve(struct client_state *csp);
832 #else /* ifndef AMIGA */
833 static void serve(struct client_state *csp);
834 #endif /* def AMIGA */
837 static int32 server_thread(void *data);
838 #endif /* def __BEOS__ */
841 #define sleep(N) Sleep(((N) * 1000))
845 #define sleep(N) DosSleep(((N) * 100))
848 #ifdef FEATURE_PTHREAD
849 pthread_mutex_t log_mutex;
850 pthread_mutex_t log_init_mutex;
852 #ifndef HAVE_GMTIME_R
853 pthread_mutex_t gmtime_mutex;
854 #endif /* ndef HAVE_GMTIME_R */
856 #ifndef HAVE_LOCALTIME_R
857 pthread_mutex_t localtime_mutex;
858 #endif /* ndef HAVE_GMTIME_R */
860 #ifndef HAVE_GETHOSTBYADDR_R
861 pthread_mutex_t gethostbyaddr_mutex;
862 #endif /* ndef HAVE_GETHOSTBYADDR_R */
864 #ifndef HAVE_GETHOSTBYNAME_R
865 pthread_mutex_t gethostbyname_mutex;
866 #endif /* ndef HAVE_GETHOSTBYNAME_R */
869 pthread_mutex_t rand_mutex;
870 #endif /* ndef HAVE_RANDOM */
872 #endif /* FEATURE_PTHREAD */
874 #if defined(unix) || defined(__EMX__)
875 const char *basedir = NULL;
876 const char *pidfile = NULL;
877 int received_hup_signal = 0;
878 #endif /* defined unix */
880 /* The vanilla wafer. */
881 static const char VANILLA_WAFER[] =
882 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
883 "Do_not_send_me_any_copyrighted_information_other_than_the_"
884 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
885 "In_particular_do_not_send_me_any_cookies_that_"
886 "are_subject_to_a_claim_of_copyright_by_anybody._"
887 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
888 "(copyright_or_otherwise)_applying_to_any_cookie._";
890 /* HTTP snipplets. */
891 const char CSUCCEED[] =
892 "HTTP/1.0 200 Connection established\n"
893 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
895 const char CHEADER[] =
896 "HTTP/1.0 400 Invalid header received from browser\r\n"
897 "Connection: close\r\n\r\n"
898 "Invalid header received from browser.";
900 const char CFORBIDDEN[] =
901 "HTTP/1.0 403 Connection not allowable\r\n"
902 "X-Hint: If you read this message interactively, then you know why this happens ,-)\r\n"
903 "Connection: close\r\n\r\n";
905 const char FTP_RESPONSE[] =
906 "HTTP/1.0 400 Invalid request received from browser\r\n"
907 "Connection: close\r\n\r\n"
908 "Invalid request. Privoxy doesn't support FTP.\r\n";
910 const char GOPHER_RESPONSE[] =
911 "HTTP/1.0 400 Invalid request received from browser\r\n"
912 "Connection: close\r\n\r\n"
913 "Invalid request. Privoxy doesn't support gopher.\r\n";
915 const char MISSING_DESTINATION_RESPONSE[] =
916 "HTTP/1.0 400 Bad request received from browser\r\n"
917 "Connection: close\r\n\r\n"
918 "Bad request. Privoxy was unable to extract the destination.\r\n";
921 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
922 /*********************************************************************
924 * Function : sig_handler
926 * Description : Signal handler for different signals.
927 * Exit gracefully on TERM and INT
928 * or set a flag that will cause the errlog
929 * to be reopened by the main thread on HUP.
932 * 1 : the_signal = the signal cause this function to call
936 *********************************************************************/
937 static void sig_handler(int the_signal)
943 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
954 received_hup_signal = 1;
959 * We shouldn't be here, unless we catch signals
960 * in main() that we can't handle here!
962 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
970 /*********************************************************************
974 * Description : Once a connection to the client has been accepted,
975 * this function is called (via serve()) to handle the
976 * main business of the communication. When this
977 * function returns, the caller must close the client
981 * 1 : csp = Current client state (buffers, headers, etc...)
983 * Returns : On success, the number of bytes written are returned (zero
984 * indicates nothing was written). On error, -1 is returned,
985 * and errno is set appropriately. If count is zero and the
986 * file descriptor refers to a regular file, 0 will be
987 * returned without causing any other effect. For a special
988 * file, the results are not portable.
990 *********************************************************************/
991 static void chat(struct client_state *csp)
994 * This next lines are a little ugly, but they simplifies the if statements
995 * below. Basically if TOGGLE, then we want the if to test if the
996 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
997 * then we want the if to test for CSP_FLAG_FORCED , else we don't
999 #ifdef FEATURE_TOGGLE
1000 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
1001 #else /* ifndef FEATURE_TOGGLE */
1002 # define IS_TOGGLED_ON_AND
1003 #endif /* ndef FEATURE_TOGGLE */
1004 #ifdef FEATURE_FORCE_LOAD
1005 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
1006 #else /* ifndef FEATURE_FORCE_LOAD */
1007 # define IS_NOT_FORCED_AND
1008 #endif /* def FEATURE_FORCE_LOAD */
1010 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
1012 char buf[BUFFER_SIZE];
1020 int ms_iis5_hack = 0;
1021 size_t byte_count = 0;
1022 int forwarded_connect_retries = 0;
1023 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
1024 const struct forward_spec * fwd;
1025 struct http_request *http;
1026 int len; /* for buffer sizes (and negative error codes) */
1027 #ifdef FEATURE_KILL_POPUPS
1028 int block_popups; /* bool, 1==will block popups */
1029 int block_popups_now = 0; /* bool, 1==currently blocking popups */
1030 #endif /* def FEATURE_KILL_POPUPS */
1032 int pcrs_filter; /* bool, 1==will filter through pcrs */
1033 int gif_deanimate; /* bool, 1==will deanimate gifs */
1034 int jpeg_inspect; /* bool, 1==will inspect jpegs */
1036 /* Function that does the content filtering for the current request */
1037 char *(*content_filter)() = NULL;
1039 /* Skeleton for HTTP response, if we should intercept the request */
1040 struct http_response *rsp;
1042 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1043 struct list header_list;
1044 struct list *headers = &header_list;
1049 * Read the client's request. Note that since we're not using select() we
1050 * could get blocked here if a client connected, then didn't say anything!
1055 len = read_socket(csp->cfd, buf, sizeof(buf));
1057 if (len <= 0) break; /* error! */
1060 * If there is no memory left for buffering the
1061 * request, there is nothing we can do but hang up
1063 if (add_to_iob(csp, buf, len))
1068 req = get_header(csp);
1072 break; /* no HTTP request! */
1077 continue; /* more to come! */
1081 * If it's a FTP or gopher request, we don't support it.
1083 * These checks are better than nothing, but they might
1084 * not work in all configurations and some clients might
1085 * have problems digesting the answer.
1087 * They should, however, never cause more problems than
1088 * Privoxy's old behaviour (returning the misleading HTML error message:
1089 * "Could not resolve http://(ftp|gopher)://example.org").
1091 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1093 if (!strncmpic(req, "GET ftp://", 10))
1095 strcpy(buf, FTP_RESPONSE);
1096 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as FTP proxy: %s",
1097 csp->ip_addr_str, req);
1101 strcpy(buf, GOPHER_RESPONSE);
1102 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as gopher proxy: %s",
1103 csp->ip_addr_str, req);
1105 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1107 write_socket(csp->cfd, buf, strlen(buf));
1108 free_http_request(http);
1112 #ifdef FEATURE_FORCE_LOAD
1113 /* If this request contains the FORCE_PREFIX,
1114 * better get rid of it now and set the force flag --oes
1117 if (strstr(req, FORCE_PREFIX))
1119 strclean(req, FORCE_PREFIX);
1120 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
1121 csp->flags |= CSP_FLAG_FORCED;
1124 #endif /* def FEATURE_FORCE_LOAD */
1126 switch( parse_http_request(req, http, csp) )
1129 log_error(LOG_LEVEL_ERROR, "Out of memory while parsing request.");
1132 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", req);
1140 if (http->cmd == NULL)
1142 strcpy(buf, CHEADER);
1143 write_socket(csp->cfd, buf, strlen(buf));
1145 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
1147 free_http_request(http);
1151 /* grab the rest of the client's headers */
1155 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1157 len = read_socket(csp->cfd, buf, sizeof(buf));
1160 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1165 * If there is no memory left for buffering the
1166 * request, there is nothing we can do but hang up
1168 if (add_to_iob(csp, buf, len))
1175 if (p == NULL) break;
1182 if (http->host == NULL)
1185 * Intercepted or invalid request without domain
1186 * inside the request line. Try to get it another way.
1188 if (JB_ERR_OK == get_destination_from_headers(headers, http))
1190 /* Split the domain we just got for pattern matching */
1191 init_domain_components(http);
1195 /* We can't work without destination. Go spread the news.*/
1197 req = list_to_text(headers);
1199 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, http->cmd);
1200 log_error(LOG_LEVEL_ERROR,
1201 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1202 csp->ip_addr_str, http->cmd, req);
1205 strcpy(buf, MISSING_DESTINATION_RESPONSE);
1206 write_socket(csp->cfd, buf, strlen(buf));
1207 free_http_request(http);
1208 destroy_list(headers);
1212 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1213 * to get the destination IP address, use it as host directly
1214 * or do a reverse DNS lookup first.
1218 /* decide how to route the HTTP request */
1220 if ((fwd = forward_url(http, csp)) == NULL)
1222 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1223 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1226 /* build the http request to send to the server
1227 * we have to do one of the following:
1229 * create = use the original HTTP request to create a new
1230 * HTTP request that has either the path component
1231 * without the http://domainspec (w/path) or the
1232 * full orininal URL (w/url)
1233 * Note that the path and/or the HTTP version may
1234 * have been altered by now.
1236 * connect = Open a socket to the host:port of the server
1237 * and short-circuit server and client socket.
1239 * pass = Pass the request unchanged if forwarding a CONNECT
1240 * request to a parent proxy. Note that we'll be sending
1241 * the CFAIL message ourselves if connecting to the parent
1242 * fails, but we won't send a CSUCCEED message if it works,
1243 * since that would result in a double message (ours and the
1244 * parent's). After sending the request to the parent, we simply
1247 * here's the matrix:
1250 * +--------+--------+
1252 * 0 | create | connect|
1254 * Forwarding +--------+--------+
1256 * 1 | create | pass |
1258 * +--------+--------+
1263 * Determine the actions for this URL
1265 #ifdef FEATURE_TOGGLE
1266 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1268 /* Most compatible set of actions (i.e. none) */
1269 init_current_action(csp->action);
1272 #endif /* ndef FEATURE_TOGGLE */
1274 url_actions(http, csp);
1279 * Check if a CONNECT request is allowable:
1280 * In the absence of a +limit-connect action, allow only port 443.
1281 * If there is an action, allow whatever matches the specificaton.
1285 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
1286 || (csp->action->flags & ACTION_LIMIT_CONNECT
1287 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
1289 if (csp->action->flags & ACTION_TREAT_FORBIDDEN_CONNECTS_LIKE_BLOCKS)
1291 /* The response will violate the specs, but makes unblocking easier. */
1292 log_error(LOG_LEVEL_ERROR, "Marking suspicious CONNECT request from %s for blocking.",
1294 csp->action->flags |= ACTION_BLOCK;
1299 strcpy(buf, CFORBIDDEN);
1300 write_socket(csp->cfd, buf, strlen(buf));
1301 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
1302 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
1310 * Downgrade http version from 1.1 to 1.0 if +downgrade
1313 if ( (http->ssl == 0)
1314 && (!strcmpic(http->ver, "HTTP/1.1"))
1315 && (csp->action->flags & ACTION_DOWNGRADE))
1318 http->ver = strdup("HTTP/1.0");
1320 if (http->ver == NULL)
1322 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1327 * Save a copy of the original request for logging
1329 http->ocmd = strdup(http->cmd);
1331 if (http->ocmd == NULL)
1333 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
1337 * (Re)build the HTTP request for non-SSL requests.
1338 * If forwarding, use the whole URL, else, use only the path.
1344 http->cmd = strdup(http->gpc);
1345 string_append(&http->cmd, " ");
1347 if (fwd->forward_host)
1349 string_append(&http->cmd, http->url);
1353 string_append(&http->cmd, http->path);
1355 string_append(&http->cmd, " ");
1356 string_append(&http->cmd, http->ver);
1358 if (http->cmd == NULL)
1360 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1362 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", http->cmd);
1364 enlist(csp->headers, http->cmd);
1366 /* Append the previously read headers */
1367 list_append_list_unique(csp->headers, headers);
1368 destroy_list(headers);
1371 * If the user has not supplied any wafers, and the user has not
1372 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1374 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1375 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1377 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1381 #ifdef FEATURE_KILL_POPUPS
1382 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
1383 #endif /* def FEATURE_KILL_POPUPS */
1385 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
1386 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
1388 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
1390 jpeg_inspect = ((csp->action->flags & ACTION_JPEG_INSPECT) != 0);
1393 * We have a request. Now, check to see if we need to
1394 * intercept it, i.e. If ..
1398 /* We may not forward the request by rfc2616 sect 14.31 */
1399 (NULL != (rsp = direct_response(csp)))
1401 /* or we are enabled and... */
1402 || (IS_ENABLED_AND (
1404 /* ..the request was blocked */
1405 ( NULL != (rsp = block_url(csp)))
1407 /* ..or untrusted */
1408 #ifdef FEATURE_TRUST
1409 || ( NULL != (rsp = trust_url(csp)))
1410 #endif /* def FEATURE_TRUST */
1412 /* ..or a redirect kicked in */
1413 || ( NULL != (rsp = redirect_url(csp)))
1417 * .. or a CGI call was detected and answered.
1419 * This check comes last to give the user the power
1420 * to deny acces to some (or all) of the cgi pages.
1422 || (NULL != (rsp = dispatch_cgi(csp)))
1426 /* Write the answer to the client */
1427 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1428 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1430 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1433 #ifdef FEATURE_STATISTICS
1434 /* Count as a rejected request */
1435 csp->flags |= CSP_FLAG_REJECTED;
1436 #endif /* def FEATURE_STATISTICS */
1438 /* Log (FIXME: All intercept reasons appear as "crunch" with Status 200) */
1439 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
1440 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
1442 /* Clean up and return */
1443 free_http_response(rsp);
1447 hdr = sed(client_patterns, add_client_headers, csp);
1450 /* FIXME Should handle error properly */
1451 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1454 list_remove_all(csp->headers);
1456 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1458 if (fwd->forward_host)
1460 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1461 fwd->forward_host, fwd->forward_port, http->hostport);
1465 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1468 /* here we connect to the server, gateway, or the forwarder */
1470 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
1471 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
1473 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
1474 forwarded_connect_retries, http->hostport);
1477 if (csp->sfd == JB_INVALID_SOCKET)
1479 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1482 if (errno == EINVAL)
1484 rsp = error_response(csp, "no-such-domain", errno);
1486 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
1487 csp->ip_addr_str, http->ocmd);
1491 rsp = error_response(csp, "connect-failed", errno);
1493 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1494 csp->ip_addr_str, http->ocmd);
1498 /* Write the answer to the client */
1501 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1502 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1504 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1508 free_http_response(rsp);
1513 log_error(LOG_LEVEL_CONNECT, "OK");
1515 if (fwd->forward_host || (http->ssl == 0))
1517 /* write the client's (modified) header to the server
1518 * (along with anything else that may be in the buffer)
1521 if (write_socket(csp->sfd, hdr, strlen(hdr))
1522 || (flush_socket(csp->sfd, csp) < 0))
1524 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1527 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1528 csp->ip_addr_str, http->ocmd);
1530 rsp = error_response(csp, "connect-failed", errno);
1534 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1535 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1537 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1541 free_http_response(rsp);
1549 * We're running an SSL tunnel and we're not forwarding,
1550 * so just send the "connect succeeded" message to the
1551 * client, flush the rest, and get out of the way.
1553 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1554 csp->ip_addr_str, http->ocmd);
1556 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
1564 /* we're finished with the client's header */
1567 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1569 /* pass data between the client and server
1570 * until one or the other shuts down the connection.
1579 * FD_ZERO here seems to point to an errant macro which crashes.
1580 * So do this by hand for now...
1582 memset(&rfds,0x00,sizeof(fd_set));
1586 FD_SET(csp->cfd, &rfds);
1587 FD_SET(csp->sfd, &rfds);
1589 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
1593 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1597 /* this is the body of the browser's request
1598 * just read it and write it.
1601 if (FD_ISSET(csp->cfd, &rfds))
1603 len = read_socket(csp->cfd, buf, sizeof(buf));
1607 break; /* "game over, man" */
1610 if (write_socket(csp->sfd, buf, (size_t)len))
1612 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1619 * The server wants to talk. It could be the header or the body.
1620 * If `hdr' is null, then it's the header otherwise it's the body.
1621 * FIXME: Does `hdr' really mean `host'? No.
1625 if (FD_ISSET(csp->sfd, &rfds))
1628 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1632 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1634 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1635 csp->ip_addr_str, http->ocmd);
1637 rsp = error_response(csp, "connect-failed", errno);
1641 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1642 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1644 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1648 free_http_response(rsp);
1652 /* Add a trailing zero. This lets filter_popups
1653 * use string operations.
1657 #ifdef FEATURE_KILL_POPUPS
1658 /* Filter the popups on this read. */
1659 if (block_popups_now)
1661 filter_popups(buf, csp);
1663 #endif /* def FEATURE_KILL_POPUPS */
1665 /* Normally, this would indicate that we've read
1666 * as much as the server has sent us and we can
1667 * close the client connection. However, Microsoft
1668 * in its wisdom has released IIS/5 with a bug that
1669 * prevents it from sending the trailing \r\n in
1670 * a 302 redirect header (and possibly other headers).
1671 * To work around this if we've haven't parsed
1672 * a full header we'll append a trailing \r\n
1673 * and see if this now generates a valid one.
1675 * This hack shouldn't have any impacts. If we've
1676 * already transmitted the header or if this is a
1677 * SSL connection, then we won't bother with this
1678 * hack. So we only work on partially received
1679 * headers. If we append a \r\n and this still
1680 * doesn't generate a valid header, then we won't
1681 * transmit anything to the client.
1686 if (server_body || http->ssl)
1689 * If we have been buffering up the document,
1690 * now is the time to apply content modification
1691 * and send the result to the client.
1696 * If the content filter fails, use the original
1697 * buffer and length.
1698 * (see p != NULL ? p : csp->iob->cur below)
1700 if (NULL == (p = (*content_filter)(csp)))
1702 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
1705 hdr = sed(server_patterns_light, NULL, csp);
1709 /* FIXME Should handle error properly */
1710 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1713 if (write_socket(csp->cfd, hdr, strlen(hdr))
1714 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
1716 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1726 break; /* "game over, man" */
1730 * This is NOT the body, so
1731 * Let's pretend the server just sent us a blank line.
1733 snprintf(buf, sizeof(buf), "\r\n");
1734 len = (int)strlen(buf);
1737 * Now, let the normal header parsing algorithm below do its
1738 * job. If it fails, we'll exit instead of continuing.
1745 * If this is an SSL connection or we're in the body
1746 * of the server document, just write it to the client,
1747 * unless we need to buffer the body for later content-filtering
1750 if (server_body || http->ssl)
1755 * If there is no memory left for buffering the content, or the buffer limit
1756 * has been reached, switch to non-filtering mode, i.e. make & write the
1757 * header, flush the iob and buf, and get out of the way.
1759 if (add_to_iob(csp, buf, len))
1764 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
1766 hdr = sed(server_patterns, add_server_headers, csp);
1770 * Memory is too tight to even generate the header.
1771 * Send our static "Out-of-memory" page.
1773 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
1774 rsp = cgi_error_memory();
1776 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1777 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1779 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1784 hdrlen = strlen(hdr);
1786 if (write_socket(csp->cfd, hdr, hdrlen)
1787 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
1788 || (write_socket(csp->cfd, buf, (size_t)len)))
1790 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
1796 byte_count += hdrlen + (size_t)(flushed + len);
1798 content_filter = NULL;
1805 if (write_socket(csp->cfd, buf, (size_t)len))
1807 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
1811 byte_count += (size_t)len;
1816 /* we're still looking for the end of the
1817 * server's header ... (does that make header
1818 * parsing an "out of body experience" ?
1822 * buffer up the data we just read. If that fails,
1823 * there's little we can do but send our static
1824 * out-of-memory page.
1826 if (add_to_iob(csp, buf, len))
1828 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
1829 rsp = cgi_error_memory();
1831 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1832 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1834 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1839 /* get header lines from the iob */
1841 while ((p = get_header(csp)) != NULL)
1845 /* see following note */
1848 enlist(csp->headers, p);
1852 /* NOTE: there are no "empty" headers so
1853 * if the pointer `p' is not NULL we must
1854 * assume that we reached the end of the
1855 * buffer before we hit the end of the header.
1862 /* Well, we tried our MS IIS/5
1863 * hack and it didn't work.
1864 * The header is incomplete
1865 * and there isn't anything
1866 * we can do about it.
1872 /* Since we have to wait for
1873 * more from the server before
1874 * we can parse the headers
1875 * we just continue here.
1881 /* we have now received the entire header.
1882 * filter it and send the result to the client
1885 hdr = sed(server_patterns, add_server_headers, csp);
1888 /* FIXME Should handle error properly */
1889 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1892 #ifdef FEATURE_KILL_POPUPS
1893 /* Start blocking popups if appropriate. */
1895 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1896 !http->ssl && /* We talk plaintext */
1897 block_popups) /* Policy allows */
1899 block_popups_now = 1;
1901 * Filter the part of the body that came in the same read
1902 * as the last headers:
1904 filter_popups(csp->iob->cur, csp);
1907 #endif /* def FEATURE_KILL_POPUPS */
1909 /* Buffer and pcrs filter this if appropriate. */
1911 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1912 !http->ssl && /* We talk plaintext */
1913 pcrs_filter) /* Policy allows */
1915 content_filter = pcrs_filter_response;
1918 /* Buffer and gif_deanimate this if appropriate. */
1920 if ((csp->content_type & CT_GIF) && /* It's an image/gif MIME-Type */
1921 !http->ssl && /* We talk plaintext */
1922 gif_deanimate) /* Policy allows */
1924 content_filter = gif_deanimate_response;
1927 /* Buffer and jpg_inspect this if appropriate. */
1929 if ((csp->content_type & CT_JPEG) && /* It's an image/jpeg MIME-Type */
1930 !http->ssl && /* We talk plaintext */
1931 jpeg_inspect) /* Policy allows */
1933 content_filter = jpeg_inspect_response;
1937 * Only write if we're not buffering for content modification
1939 if (!content_filter)
1941 /* write the server's (modified) header to
1942 * the client (along with anything else that
1943 * may be in the buffer)
1946 if (write_socket(csp->cfd, hdr, strlen(hdr))
1947 || ((len = flush_socket(csp->cfd, csp)) < 0))
1949 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1951 /* the write failed, so don't bother
1952 * mentioning it to the client...
1953 * it probably can't hear us anyway.
1959 byte_count += (size_t)len;
1962 /* we're finished with the server's header */
1967 /* If this was a MS IIS/5 hack then it means
1968 * the server has already closed the
1969 * connection. Nothing more to read. Time
1980 return; /* huh? we should never get here */
1983 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
1984 csp->ip_addr_str, http->ocmd, byte_count);
1988 /*********************************************************************
1992 * Description : This is little more than chat. We only "serve" to
1993 * to close any socket that chat may have opened.
1996 * 1 : csp = Current client state (buffers, headers, etc...)
2000 *********************************************************************/
2002 void serve(struct client_state *csp)
2003 #else /* ifndef AMIGA */
2004 static void serve(struct client_state *csp)
2005 #endif /* def AMIGA */
2008 close_socket(csp->cfd);
2010 if (csp->sfd != JB_INVALID_SOCKET)
2012 close_socket(csp->sfd);
2015 csp->flags &= ~CSP_FLAG_ACTIVE;
2021 /*********************************************************************
2023 * Function : server_thread
2025 * Description : We only exist to call `serve' in a threaded environment.
2028 * 1 : data = Current client state (buffers, headers, etc...)
2030 * Returns : Always 0.
2032 *********************************************************************/
2033 static int32 server_thread(void *data)
2035 serve((struct client_state *) data);
2042 /*********************************************************************
2046 * Description : Print usage info & exit.
2048 * Parameters : Pointer to argv[0] for identifying ourselves
2052 *********************************************************************/
2053 void usage(const char *myname)
2055 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
2057 "Usage: %s [--help] [--version] [configfile]\n"
2059 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
2061 "Aborting.\n", myname);
2068 /*********************************************************************
2072 * Description : Load the config file and start the listen loop.
2073 * This function is a lot more *sane* with the `load_config'
2074 * and `listen_loop' functions; although it stills does
2075 * a *little* too much for my taste.
2078 * 1 : argc = Number of parameters (including $0).
2079 * 2 : argv = Array of (char *)'s to the parameters.
2081 * Returns : 1 if : can't open config file, unrecognized directive,
2082 * stats requested in multi-thread mode, can't open the
2083 * log file, can't open the jar file, listen port is invalid,
2084 * any load fails, and can't bind port.
2086 * Else main never returns, the process must be signaled
2087 * to terminate execution. Or, on Windows, use the
2088 * "File", "Exit" menu option.
2090 *********************************************************************/
2092 int real_main(int argc, const char *argv[])
2094 int main(int argc, const char *argv[])
2098 unsigned int random_seed;
2100 struct passwd *pw = NULL;
2101 struct group *grp = NULL;
2110 #if !defined(_WIN32)
2118 * Parse the command line arguments
2120 while (++argc_pos < argc)
2123 /* Check to see if the service must be installed or uninstalled */
2124 if (strncmp(argv[argc_pos], "--install", 9) == 0)
2126 const char *pName = argv[argc_pos] + 9;
2129 exit( (install_service(pName)) ? 0 : 1 );
2131 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
2133 const char *pName = argv[argc_pos] + 11;
2136 exit((uninstall_service(pName)) ? 0 : 1);
2138 else if (strcmp(argv[argc_pos], "--service" ) == 0)
2140 bRunAsService = TRUE;
2141 w32_set_service_cwd();
2142 atexit(w32_service_exit_notify);
2145 #endif /* defined(_WIN32) */
2148 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2150 if (strcmp(argv[argc_pos], "--help") == 0)
2155 else if(strcmp(argv[argc_pos], "--version") == 0)
2157 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
2163 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
2168 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
2170 if (++argc_pos == argc) usage(argv[0]);
2171 pidfile = strdup(argv[argc_pos]);
2174 else if (strcmp(argv[argc_pos], "--user" ) == 0)
2176 if (++argc_pos == argc) usage(argv[argc_pos]);
2178 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
2181 if (NULL == (grp = getgrnam(p)))
2183 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
2187 if (NULL == (pw = getpwnam(argv[argc_pos])))
2189 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
2192 if (p != NULL) *--p = '\0';
2195 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
2200 #endif /* defined(unix) */
2201 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
2203 configfile = argv[argc_pos];
2206 } /* -END- while (more arguments) */
2209 if ( *configfile != '/' )
2211 char *abs_file, cwd[1024];
2213 /* make config-filename absolute here */
2214 if ( !(getcwd(cwd, sizeof(cwd))))
2216 perror("get working dir failed");
2220 if (!(basedir = strdup(cwd))
2221 || (!(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))))
2223 perror("malloc failed");
2226 strcpy( abs_file, basedir );
2227 strcat( abs_file, "/" );
2228 strcat( abs_file, configfile );
2229 configfile = abs_file;
2231 #endif /* defined unix */
2235 clients->next = NULL;
2239 #elif defined(_WIN32)
2243 #ifdef FEATURE_PTHREAD
2245 * Prepare global mutex semaphores
2247 pthread_mutex_init(&log_mutex,0);
2248 pthread_mutex_init(&log_init_mutex,0);
2250 #ifndef HAVE_GMTIME_R
2251 pthread_mutex_init(&gmtime_mutex,0);
2252 #endif /* ndef HAVE_GMTIME_R */
2254 #ifndef HAVE_LOCALTIME_R
2255 pthread_mutex_init(&localtime_mutex,0);
2256 #endif /* ndef HAVE_GMTIME_R */
2258 #ifndef HAVE_GETHOSTBYADDR_R
2259 pthread_mutex_init(&gethostbyaddr_mutex,0);
2260 #endif /* ndef HAVE_GETHOSTBYADDR_R */
2262 #ifndef HAVE_GETHOSTBYNAME_R
2263 pthread_mutex_init(&gethostbyname_mutex,0);
2264 #endif /* ndef HAVE_GETHOSTBYNAME_R */
2267 pthread_mutex_init(&rand_mutex,0);
2268 #endif /* ndef HAVE_RANDOM */
2270 #endif /* FEATURE_PTHREAD */
2272 random_seed = (unsigned int)time(NULL);
2274 srandom(random_seed);
2277 #endif /* ifdef HAVE_RANDOM */
2280 * Unix signal handling
2282 * Catch the abort, interrupt and terminate signals for a graceful exit
2283 * Catch the hangup signal so the errlog can be reopened.
2284 * Ignore the broken pipe signals (FIXME: Why?)
2286 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
2289 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
2290 const int ignored_signals[] = { SIGPIPE, 0 };
2292 for (idx = 0; catched_signals[idx] != 0; idx++)
2294 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
2295 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
2297 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
2298 #endif /* ifdef sun */
2300 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
2304 for (idx = 0; ignored_signals[idx] != 0; idx++)
2306 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
2308 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
2313 #else /* ifdef _WIN32 */
2314 # ifdef _WIN_CONSOLE
2316 * We *are* in a windows console app.
2317 * Print a verbose messages about FAQ's and such
2319 printf("%s", win32_blurb);
2320 # endif /* def _WIN_CONSOLE */
2321 #endif /* def _WIN32 */
2324 /* Initialize the CGI subsystem */
2325 cgi_init_error_messages();
2328 * If runnig on unix and without the --nodaemon
2329 * option, become a daemon. I.e. fork, detach
2330 * from tty and get process group leadership
2343 if ( pid < 0 ) /* error */
2348 else if ( pid != 0 ) /* parent */
2353 * must check for errors
2354 * child died due to missing files aso
2357 wpid = waitpid( pid, &status, WNOHANG );
2366 /* Should be more portable, but not as well tested */
2371 #else /* ndef __FreeBSD__ */
2373 #endif /* ndef __FreeBSD__ */
2374 fd = open("/dev/tty", O_RDONLY);
2377 /* no error check here */
2378 ioctl( fd, TIOCNOTTY,0 );
2382 /* FIXME: should close stderr (fd 2) here too, but the test
2384 * and load config file is done in listen_loop() and puts
2385 * some messages on stderr there.
2392 } /* -END- if (!no_daemon) */
2395 * As soon as we have written the PID file, we can switch
2396 * to the user and group ID indicated by the --user option
2402 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
2404 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
2410 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
2412 if (chroot(pw->pw_dir) < 0)
2414 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
2418 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
2421 if (setuid(pw->pw_uid))
2423 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
2427 char putenv_dummy[64];
2429 strcpy(putenv_dummy, "HOME=/");
2430 if (putenv(putenv_dummy) != 0)
2432 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
2435 snprintf(putenv_dummy, 64, "USER=%s", pw->pw_name);
2436 if (putenv(putenv_dummy) != 0)
2438 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
2444 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
2447 #endif /* defined unix */
2450 /* This will be FALSE unless the command line specified --service
2454 /* Yup, so now we must attempt to establish a connection
2455 * with the service dispatcher. This will only work if this
2456 * process was launched by the service control manager to
2457 * actually run as a service. If this isn't the case, i've
2458 * known it take around 30 seconds or so for the call to return.
2461 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
2462 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
2464 /* Service has run, and at this point is now being stopped, so just return */
2469 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
2471 /* An error occurred. Usually it's because --service was wrongly specified
2472 * and we were unable to connect to the Service Control Dispatcher because
2473 * it wasn't expecting us and is therefore not listening.
2475 * For now, just continue below to call the listen_loop function.
2478 #endif /* def _WIN32 */
2488 /*********************************************************************
2490 * Function : bind_port_helper
2492 * Description : Bind the listen port. Handles logging, and aborts
2496 * 1 : config = Privoxy configuration. Specifies port
2499 * Returns : Port that was opened.
2501 *********************************************************************/
2502 static jb_socket bind_port_helper(struct configuration_spec * config)
2507 if ( (config->haddr != NULL)
2508 && (config->haddr[0] == '1')
2509 && (config->haddr[1] == '2')
2510 && (config->haddr[2] == '7')
2511 && (config->haddr[3] == '.') )
2513 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
2516 else if (config->haddr == NULL)
2518 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
2523 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
2524 config->hport, config->haddr);
2527 result = bind_port(config->haddr, config->hport, &bfd);
2534 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2535 "There may be another Privoxy or some other "
2536 "proxy running on port %d",
2537 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
2538 config->hport, config->hport);
2541 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2542 "The hostname is not resolvable",
2543 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2546 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
2547 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2550 /* shouldn't get here */
2551 return JB_INVALID_SOCKET;
2554 config->need_bind = 0;
2561 /* Without this simple workaround we get this compiler warning from _beginthread
2562 * warning C4028: formal parameter 1 different from declaration
2564 void w32_service_listen_loop(void *p)
2568 #endif /* def _WIN32 */
2571 /*********************************************************************
2573 * Function : listen_loop
2575 * Description : bind the listen port and enter a "FOREVER" listening loop.
2581 *********************************************************************/
2582 static void listen_loop(void)
2584 struct client_state *csp = NULL;
2586 struct configuration_spec * config;
2588 config = load_config();
2590 bfd = bind_port_helper(config);
2592 #ifdef FEATURE_GRACEFUL_TERMINATION
2593 while (!g_terminate)
2598 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
2599 while (waitpid(-1, NULL, WNOHANG) > 0)
2601 /* zombie children */
2603 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
2606 * Free data that was used by died threads
2612 * Re-open the errlog after HUP signal
2614 if (received_hup_signal)
2616 init_error_log(Argv[0], config->logfile, config->debug);
2617 received_hup_signal = 0;
2622 #ifdef FEATURE_COOKIE_JAR
2624 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
2625 * already open. I think unload_configfile() is not being run, which should do
2626 * this work. Until that can get resolved, we'll use this workaround.
2630 if (csp->config->jar)
2632 fclose(csp->config->jar);
2633 csp->config->jar = NULL;
2635 #endif /* FEATURE_COOKIE_JAR */
2636 #endif /* __OS2__ */
2638 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
2640 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
2644 csp->flags |= CSP_FLAG_ACTIVE;
2645 csp->sfd = JB_INVALID_SOCKET;
2647 csp->config = config = load_config();
2649 if ( config->need_bind )
2652 * Since we were listening to the "old port", we will not see
2653 * a "listen" param change until the next IJB request. So, at
2654 * least 1 more request must be made for us to find the new
2655 * setting. I am simply closing the old socket and binding the
2658 * Which-ever is correct, we will serve 1 more page via the
2659 * old settings. This should probably be a "show-proxy-args"
2660 * request. This should not be a so common of an operation
2661 * that this will hurt people's feelings.
2666 bfd = bind_port_helper(config);
2669 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
2671 if (!accept_connection(csp, bfd))
2673 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
2686 log_error(LOG_LEVEL_CONNECT, "OK");
2689 #ifdef FEATURE_TOGGLE
2690 if (global_toggle_state)
2692 csp->flags |= CSP_FLAG_TOGGLED_ON;
2694 #endif /* def FEATURE_TOGGLE */
2696 if (run_loader(csp))
2698 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
2699 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2703 if (block_acl(NULL,csp))
2705 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
2706 close_socket(csp->cfd);
2710 #endif /* def FEATURE_ACL */
2712 /* add it to the list of clients */
2713 csp->next = clients->next;
2714 clients->next = csp;
2716 if (config->multi_threaded)
2720 /* this is a switch () statment in the C preprocessor - ugh */
2721 #undef SELECTED_ONE_OPTION
2723 /* Use Pthreads in preference to native code */
2724 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
2725 #define SELECTED_ONE_OPTION
2727 pthread_t the_thread;
2728 pthread_attr_t attrs;
2730 pthread_attr_init(&attrs);
2731 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
2732 errno = pthread_create(&the_thread, &attrs,
2733 (void * (*)(void *))serve, csp);
2734 child_id = errno ? -1 : 0;
2735 pthread_attr_destroy(&attrs);
2739 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
2740 #define SELECTED_ONE_OPTION
2741 child_id = _beginthread(
2742 (void (*)(void *))serve,
2747 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
2748 #define SELECTED_ONE_OPTION
2749 child_id = _beginthread(
2750 (void(* _Optlink)(void*))serve,
2756 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
2757 #define SELECTED_ONE_OPTION
2759 thread_id tid = spawn_thread
2760 (server_thread, "server", B_NORMAL_PRIORITY, csp);
2762 if ((tid >= 0) && (resume_thread(tid) == B_OK))
2764 child_id = (int) tid;
2773 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2774 #define SELECTED_ONE_OPTION
2775 csp->cfd = ReleaseSocket(csp->cfd, -1);
2777 if((child_id = (int)CreateNewProcTags(
2778 NP_Entry, (ULONG)server_thread,
2779 NP_Output, Output(),
2780 NP_CloseOutput, FALSE,
2781 NP_Name, (ULONG)"privoxy child",
2782 NP_StackSize, 200*1024,
2786 ((struct Task *)child_id)->tc_UserData = csp;
2787 Signal((struct Task *)child_id, SIGF_SINGLE);
2792 #if !defined(SELECTED_ONE_OPTION)
2795 /* This block is only needed when using fork().
2796 * When using threads, the server thread was
2797 * created and run by the call to _beginthread().
2799 if (child_id == 0) /* child */
2802 #ifdef FEATURE_TOGGLE
2803 int inherited_toggle_state = global_toggle_state;
2804 #endif /* def FEATURE_TOGGLE */
2809 * If we've been toggled or we've blocked the request, tell Mom
2812 #ifdef FEATURE_TOGGLE
2813 if (inherited_toggle_state != global_toggle_state)
2815 rc |= RC_FLAG_TOGGLED;
2817 #endif /* def FEATURE_TOGGLE */
2819 #ifdef FEATURE_STATISTICS
2820 if (csp->flags & CSP_FLAG_REJECTED)
2822 rc |= RC_FLAG_BLOCKED;
2824 #endif /* ndef FEATURE_STATISTICS */
2828 else if (child_id > 0) /* parent */
2830 /* in a fork()'d environment, the parent's
2831 * copy of the client socket and the CSP
2835 #if !defined(_WIN32) && !defined(__CYGWIN__)
2837 wait( &child_status );
2840 * Evaluate child's return code: If the child has
2841 * - been toggled, toggle ourselves
2842 * - blocked its request, bump up the stats counter
2845 #ifdef FEATURE_TOGGLE
2846 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
2848 global_toggle_state = !global_toggle_state;
2850 #endif /* def FEATURE_TOGGLE */
2852 #ifdef FEATURE_STATISTICS
2854 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
2858 #endif /* def FEATURE_STATISTICS */
2860 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
2861 close_socket(csp->cfd);
2862 csp->flags &= ~CSP_FLAG_ACTIVE;
2866 #undef SELECTED_ONE_OPTION
2867 /* end of cpp switch () */
2869 if (child_id < 0) /* failed */
2871 char buf[BUFFER_SIZE];
2873 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
2875 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
2877 write_socket(csp->cfd, buf, strlen(buf));
2878 close_socket(csp->cfd);
2879 csp->flags &= ~CSP_FLAG_ACTIVE;
2890 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
2892 /* Clean up. Aim: free all memory (no leaks) */
2893 #ifdef FEATURE_GRACEFUL_TERMINATION
2895 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
2897 unload_current_config_file();
2898 unload_current_actions_file();
2899 unload_current_re_filterfile();
2900 #ifdef FEATURE_TRUST
2901 unload_current_trust_file();
2904 if (config->multi_threaded)
2911 } while ((clients->next != NULL) && (--i > 0));
2915 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
2926 #ifdef FEATURE_COOKIE_JAR
2927 if (NULL != config->jar)
2929 fclose(config->jar);
2933 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
2934 /* Cleanup - remove taskbar icon etc. */
2939 #endif /* FEATURE_GRACEFUL_TERMINATION */