1 const char jcc_rcs[] = "$Id: jcc.c,v 1.111 2006/12/23 16:15:06 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 1.111 2006/12/23 16:15:06 fabiankeil
37 * Don't prevent core dumps by catching SIGABRT.
38 * It's rude and makes debugging unreasonable painful.
40 * Revision 1.110 2006/12/13 14:52:53 etresoft
41 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
43 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
44 * Privoxy is now able to run as intercepting
45 * proxy in combination with any packet filter
46 * that does the port redirection. The destination
47 * is extracted from the "Host:" header which
48 * should be available for nearly all requests.
50 * Moved HTTP snipplets into jcc.c.
51 * Added error message for gopher proxy requests.
53 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
54 * Only unlink the pidfile if it's actually used.
56 * Change order of interception checks to make
57 * it possible to block or redirect requests for
60 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
61 * Make pthread mutex locking more generic. Instead of
62 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
63 * and use mutex locking unless there is an _r function
64 * available. Better safe than sorry.
66 * Fixes "./configure --disable-pthread" and should result
67 * in less threading-related problems on pthread-using platforms,
68 * but it still doesn't fix BR#1122404.
70 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
71 * Move pthread.h inclusion from jcc.c to jcc.h.
72 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
74 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
75 * Don't exit after receiving the second SIGHUP on Solaris.
77 * Fixes BR 1052235, but the same problem may exist on other
78 * systems. Once 3.0.6 is out we should use sigset()
79 * where available and see if it breaks anything.
81 * Revision 1.104 2006/09/23 13:26:38 roro
82 * Replace TABs by spaces in source code.
84 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
85 * Fix +redirect{}. Didn't work with -fast-redirects.
87 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
88 * Respond with 400 and a short text message
89 * if the client tries to use Privoxy as FTP proxy.
91 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
92 * Make number of retries in case of forwarded-connect problems
93 * a config file option (forwarded-connect-retries) and use 0 as
96 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
99 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
100 * Follow the OpenBSD port's lead and protect the resolve
101 * functions on OpenBSD as well.
103 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
104 * --user fix. Only use the user as group if no group is specified.
105 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
107 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
108 * Windows service (re-)integration
112 * --install[:service_name]
113 * --uninstall[:service_name]
116 * They work as follows:
117 * --install will create a service for you and then terminate.
118 * By default the service name will be "privoxy" (without the quotes).
119 * However you can run multiple services if you wish, just by adding
120 * a colon and then a name (no spaces).
122 * --uninstall follows the exact same rules a --install.
124 * --service is used when the program is executed by the service
125 * control manager, and in normal circumstances would never be
126 * used as a command line argument.
128 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
129 * Windows service integration
131 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
132 * Incorporate Fabian Keil's patch work:
133 http://www.fabiankeil.de/sourcecode/privoxy/
135 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
136 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
137 * with what was really the latest development (the v_3_0_branch branch)
139 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
140 * Thanks to Jindrich Makovicka for a race condition fix for the log
141 * file. The race condition remains for non-pthread implementations.
142 * Reference patch #1175720.
144 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
145 * Add the ability to check jpeg images for invalid
146 * lengths of comment blocks. Defensive strategy
147 * against the exploit:
148 * Microsoft Security Bulletin MS04-028
149 * Buffer Overrun in JPEG Processing (GDI+) Could
150 * Allow Code Execution (833987)
151 * Enabled with +inspect-jpegs in actions files.
153 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
154 * - Fixed usage info for non-unix platforms
155 * - Fixed small cmdline parsing bug
157 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
158 * Diagnostics: Now preserve the returncode of pthread_create
159 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
161 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
162 * No longer ignore SIGCHLD. Fixes bug #769381
164 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
165 * Close jarfile on graceful exit, remove stray line
167 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
168 * Cosmetics: Killed a warning, a typo and an allocation left at exit
170 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
171 * No longer rely on non-POSIX.1 extensions of getcwd().
174 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
175 * Replaced setenv() by posix-compliant putenv()
176 * Thanks to Neil McCalden (nmcc AT users.sf.net).
178 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
179 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
181 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
182 * Clean-up and extension of improvements for forked mode:
183 * - Child's return code now consists of flags RC_FLAG_*
184 * - Reporting toggle to parent now properly #ifdef'ed
185 * - Children now report blocking to parent. This enables
186 * statistics in forked mode
188 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
189 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
190 * Children now report having been toggled through _exit(17), parents
191 * watch for that code and toggle themselves if found.
193 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
194 * Wrapping all *_r functions (the non-_r versions of them) with
195 * mutex semaphores for OSX. Hopefully this will take care of all
196 * of those pesky crash reports.
198 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
199 * Fixed two mostly harmless mem leaks
201 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
202 * Fix: Head of global clients list now initialized to NULL
204 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
205 * Added basic support for OPTIONS and TRACE HTTP methods:
206 * - New interceptor direct_response() added in chat().
207 * - sed() moved to earlier in the process, so that the
208 * Host: header is evaluated before actions and forwarding
211 * Revision 1.92 2002/05/08 16:00:46 oes
212 * Chat's buffer handling:
213 * - Fixed bug with unchecked out-of-mem conditions
214 * while reading client request & server headers
215 * - No longer predict if the buffer limit will be exceeded
216 * in the next read -- check add_to_iob's new
217 * return code. If buffer couldn't be extended
218 * (policy or out-of-mem) while
219 * - reading from client: abort
220 * - reading server headers: send error page
221 * - buffering server body for filter: flush,
222 * and if that fails: send error page
224 * Revision 1.91 2002/04/08 20:35:58 swa
227 * Revision 1.90 2002/04/02 14:57:28 oes
228 * Made sending wafers independent of FEATURE_COOKIE_JAR
230 * Revision 1.89 2002/03/31 17:18:59 jongfoster
231 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
233 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
234 * More compiler warning message maintenance
236 * Revision 1.87 2002/03/26 22:29:54 swa
237 * we have a new homepage!
239 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
240 * Workaround for closing the jarfile before load_config() comes around again
242 * Revision 1.85 2002/03/24 15:23:33 jongfoster
245 * Revision 1.84 2002/03/24 13:25:43 swa
246 * name change related issues
248 * Revision 1.83 2002/03/16 23:54:06 jongfoster
249 * Adding graceful termination feature, to help look for memory leaks.
250 * If you enable this (which, by design, has to be done by hand
251 * editing config.h) and then go to http://i.j.b/die, then the program
252 * will exit cleanly after the *next* request. It should free all the
253 * memory that was used.
255 * Revision 1.82 2002/03/13 00:27:05 jongfoster
258 * Revision 1.81 2002/03/12 01:42:50 oes
259 * Introduced modular filters
261 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
262 * OS/2 port maintenance:
263 * - Fixed EMX build - it had decayed a little
264 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
265 * substituted a memset for now.
267 * Revision 1.79 2002/03/09 20:03:52 jongfoster
268 * - Making various functions return int rather than size_t.
269 * (Undoing a recent change). Since size_t is unsigned on
270 * Windows, functions like read_socket that return -1 on
271 * error cannot return a size_t.
273 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
274 * crashes, and also frequently caused JB to jump to 100%
275 * CPU and stay there. (Because it thought it had just
276 * read ((unsigned)-1) == 4Gb of data...)
278 * - The signature of write_socket has changed, it now simply
279 * returns success=0/failure=nonzero.
281 * - Trying to get rid of a few warnings --with-debug on
282 * Windows, I've introduced a new type "jb_socket". This is
283 * used for the socket file descriptors. On Windows, this
284 * is SOCKET (a typedef for unsigned). Everywhere else, it's
285 * an int. The error value can't be -1 any more, so it's
286 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
287 * Windows it maps to the #define INVALID_SOCKET.)
289 * - The signature of bind_port has changed.
291 * Revision 1.78 2002/03/08 21:35:04 oes
292 * Added optional group supplement to --user option. Will now use default group of user if no group given
294 * Revision 1.77 2002/03/07 03:52:06 oes
295 * - Fixed compiler warnings etc
296 * - Improved handling of failed DNS lookups
298 * Revision 1.76 2002/03/06 22:54:35 jongfoster
299 * Automated function-comment nitpicking.
301 * Revision 1.75 2002/03/06 10:02:19 oes
302 * Fixed stupid bug when --user was not given
304 * Revision 1.74 2002/03/06 00:49:31 jongfoster
305 * Fixing warning on Windows
306 * Making #ifdefs that refer to the same variable consistently
307 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
309 * Revision 1.73 2002/03/05 23:57:30 hal9
310 * Stray character 's' on line 1618 was breaking build.
312 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
313 * - Re-enable OS/2 building after new parms were added
314 * - Fix false out of memory report when resolving CGI templates when no IP
315 * address is available of failed attempt (a la no such domain)
317 * Revision 1.71 2002/03/05 18:13:56 oes
318 * Added --user option
320 * Revision 1.70 2002/03/05 04:52:42 oes
321 * Deleted non-errlog debugging code
323 * Revision 1.69 2002/03/04 23:50:00 jongfoster
324 * Splitting off bind_port() call into bind_port_helper(), with
327 * Revision 1.68 2002/03/04 20:17:32 oes
330 * Revision 1.67 2002/03/04 18:18:57 oes
331 * - Removed _DEBUG mode
332 * - Cleand up cmdline parsing
333 * - Introduced --no-daemon, --pidfile options
334 * - Cleaned up signal handling:
335 * - Terminate cleanly on INT, TERM and ABRT
336 * - Schedule logfile for re-opening on HUP
337 * - Ignore CHLD and PIPE
338 * - Leave the rest with their default handlers
339 * - Uniform handler registration
340 * - Added usage() function
341 * - Played styleguide police
343 * Revision 1.66 2002/03/03 15:06:55 oes
344 * Re-enabled automatic config reloading
346 * Revision 1.65 2002/03/03 14:49:11 oes
347 * Fixed CLF logging: Now uses client's original HTTP request
349 * Revision 1.64 2002/03/03 09:18:03 joergs
350 * Made jumbjuster work on AmigaOS again.
352 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
353 * Clean up a little CRLF unpleasantness that suddenly appeared
355 * Revision 1.62 2002/02/20 23:17:23 jongfoster
356 * Detecting some out-of memory conditions and exiting with a log message.
358 * Revision 1.61 2002/01/17 21:01:52 jongfoster
359 * Moving all our URL and URL pattern parsing code to urlmatch.c.
361 * Revision 1.60 2001/12/30 14:07:32 steudten
362 * - Add signal handling (unix)
363 * - Add SIGHUP handler (unix)
364 * - Add creation of pidfile (unix)
365 * - Add action 'top' in rc file (RH)
366 * - Add entry 'SIGNALS' to manpage
367 * - Add exit message to logfile (unix)
369 * Revision 1.59 2001/12/13 14:07:18 oes
370 * Fixed Bug: 503 error page now sent OK
372 * Revision 1.58 2001/11/30 23:37:24 jongfoster
373 * Renaming the Win32 config file to config.txt - this is almost the
374 * same as the corresponding UNIX name "config"
376 * Revision 1.57 2001/11/16 00:47:43 jongfoster
377 * Changing the tty-disconnection code to use setsid().
379 * Revision 1.56 2001/11/13 20:20:54 jongfoster
380 * Tabs->spaces, fixing a bug with missing {} around an if()
382 * Revision 1.55 2001/11/13 20:14:53 jongfoster
383 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
385 * Revision 1.54 2001/11/07 00:03:14 steudten
386 * Give reliable return value if an error
387 * occurs not just 0 with new daemon mode.
389 * Revision 1.53 2001/11/05 21:41:43 steudten
390 * Add changes to be a real daemon just for unix os.
391 * (change cwd to /, detach from controlling tty, set
392 * process group and session leader to the own process.
394 * Add some fatal-error log message for failed malloc().
395 * Add '-d' if compiled with 'configure --with-debug' to
396 * enable debug output.
398 * Revision 1.52 2001/10/26 20:11:20 jongfoster
399 * Fixing type mismatch
401 * Revision 1.51 2001/10/26 17:38:28 oes
404 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
405 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
406 * threads to call select() simultaneously. So, it's time to do a real, live,
407 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
408 * (native). Both versions will work, but using __OS2__ offers multi-threading.
410 * Revision 1.49 2001/10/23 21:41:35 jongfoster
411 * Added call to initialize the (statically-allocated of course)
412 * "out of memory" CGI response.
414 * Revision 1.48 2001/10/10 19:56:46 jongfoster
415 * Moving some code that wasn't cookie-related out of an #ifdef
418 * Revision 1.47 2001/10/10 16:44:36 oes
419 * Added CONNECT destination port limitation check
421 * Revision 1.46 2001/10/08 15:17:41 oes
422 * Re-enabled SSL forwarding
424 * Revision 1.45 2001/10/07 15:42:11 oes
425 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
427 * Moved downgrading of the HTTP version from parse_http_request to
428 * chat(), since we can't decide if it is necessary before we have
429 * determined the actions for the URL. The HTTP command is now
430 * *always* re-built so the repairs need no longer be special-cased.
432 * filter_popups now gets a csp pointer so it can raise the new
433 * CSP_FLAG_MODIFIED flag.
437 * Added configurable size limit for the IOB. If the IOB grows so
438 * large that the next read would exceed the limit, the header
439 * is generated, and the header & unfiltered buffer are flushed
440 * to the client. Chat then continues in non-buffering,
441 * non-filtering body mode.
443 * Revision 1.44 2001/10/02 18:13:57 oes
446 * Revision 1.43 2001/10/02 15:32:13 oes
447 * Moved generation of hdr
449 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
450 * Cleaning up 2 compiler warnings on OS/2.
452 * Revision 1.41 2001/09/16 17:05:14 jongfoster
453 * Removing unused #include showarg.h
455 * Revision 1.40 2001/09/16 15:41:45 jongfoster
456 * Fixing signed/unsigned comparison warning.
458 * Revision 1.39 2001/09/16 13:21:27 jongfoster
459 * Changes to use new list functions.
461 * Revision 1.38 2001/09/16 13:01:46 jongfoster
462 * Removing redundant function call that zeroed zalloc()'d memory.
464 * Revision 1.37 2001/09/10 11:12:24 oes
465 * Deleted unused variable
467 * Revision 1.36 2001/09/10 10:56:15 oes
468 * Silenced compiler warnings
470 * Revision 1.35 2001/07/31 14:44:22 oes
471 * Deleted unused size parameter from filter_popups()
473 * Revision 1.34 2001/07/30 22:08:36 jongfoster
474 * Tidying up #defines:
475 * - All feature #defines are now of the form FEATURE_xxx
476 * - Permanently turned off WIN_GUI_EDIT
477 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
479 * Revision 1.33 2001/07/29 19:32:00 jongfoster
480 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
482 * Revision 1.32 2001/07/29 18:47:05 jongfoster
483 * Adding missing #include "loadcfg.h"
485 * Revision 1.31 2001/07/29 12:17:48 oes
486 * Applied pthread fix by Paul Lieverse
488 * Revision 1.30 2001/07/25 22:57:13 jongfoster
489 * __BEOS__ no longer overrides FEATURE_PTHREAD.
490 * This is because FEATURE_PTHREAD will soon be widely used, so I
491 * want to keep it simple.
493 * Revision 1.29 2001/07/24 12:47:06 oes
494 * Applied BeOS support update by Eugenia
496 * Revision 1.28 2001/07/23 13:26:12 oes
497 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
499 * Revision 1.27 2001/07/19 19:09:47 haroon
500 * - Added code to take care of the situation where while processing the first
501 * server response (which includes the server header), after finding the end
502 * of the headers we were not looking past the end of the headers for
503 * content modification. I enabled it for filter_popups.
504 * Someone else should look to see if other similar operations should be
505 * done to the discarded portion of the buffer.
507 * Note 2001/07/20: No, the other content modification mechanisms will process
508 * the whole iob later anyway. --oes
510 * Revision 1.26 2001/07/18 12:31:36 oes
513 * Revision 1.25 2001/07/15 19:43:49 jongfoster
514 * Supports POSIX threads.
515 * Also removed some unused #includes.
517 * Revision 1.24 2001/07/13 14:00:40 oes
518 * - Generic content modification scheme:
519 * Each feature has its own applicability flag that is set
520 * from csp->action->flags.
521 * Replaced the "filtering" int flag , by a function pointer
522 * "content_filter" to the function that will do the content
523 * modification. If it is != NULL, the document will be buffered
524 * and processed through *content_filter, which must set
525 * csp->content_length and return a modified copy of the body
526 * or return NULL (on failiure).
527 * - Changed csp->is_text to the more generic bitmap csp->content_type
528 * which can currently take the valued CT_TEXT or CT_GIF
530 * - Removed all #ifdef PCRS
532 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
533 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
534 * the `block_acl' call. This prevents a compilation error when the user
535 * does not wish to use the "ACL" feature.
537 * Revision 1.22 2001/06/29 21:45:41 oes
538 * Indentation, CRLF->LF, Tab-> Space
540 * Revision 1.21 2001/06/29 13:29:36 oes
541 * - Cleaned up, improved comments
542 * - Unified all possible interceptors (CGI,
543 * block, trust, fast_redirect) in one
544 * place, with one (CGI) answer generation
545 * mechansim. Much clearer now.
546 * - Removed the GIF image generation, which
547 * is now done in filters.c:block_url()
548 * - Made error conditions like domain lookup
549 * failiure or (various) problems while talking
550 * to the server use cgi.c:error_response()
551 * instead of generating HTML/HTTP in chat() (yuck!)
552 * - Removed logentry from cancelled commit
554 * Revision 1.20 2001/06/09 10:55:28 jongfoster
555 * Changing BUFSIZ ==> BUFFER_SIZE
557 * Revision 1.19 2001/06/07 23:12:52 jongfoster
558 * Replacing function pointer in struct gateway with a directly
559 * called function forwarded_connect().
560 * Replacing struct gateway with struct forward_spec
562 * Revision 1.18 2001/06/03 19:12:16 oes
563 * introduced new cgi handling
565 * Revision 1.17 2001/06/01 20:07:23 jongfoster
566 * Now uses action +image-blocker{} rather than config->tinygif
568 * Revision 1.16 2001/06/01 18:49:17 jongfoster
569 * Replaced "list_share" with "list" - the tiny memory gain was not
570 * worth the extra complexity.
572 * Revision 1.15 2001/05/31 21:24:47 jongfoster
573 * Changed "permission" to "action" throughout.
574 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
575 * Moved vanilla wafer check into chat(), since we must now
576 * decide whether or not to add it based on the URL.
578 * Revision 1.14 2001/05/29 20:14:01 joergs
579 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
582 * Revision 1.13 2001/05/29 09:50:24 jongfoster
583 * Unified blocklist/imagelist/permissionslist.
584 * File format is still under discussion, but the internal changes
587 * Also modified interceptor behaviour:
588 * - We now intercept all URLs beginning with one of the following
589 * prefixes (and *only* these prefixes):
591 * * http://ijbswa.sf.net/config/
592 * * http://ijbswa.sourceforge.net/config/
593 * - New interceptors "home page" - go to http://i.j.b/ to see it.
594 * - Internal changes so that intercepted and fast redirect pages
595 * are not replaced with an image.
596 * - Interceptors now have the option to send a binary page direct
597 * to the client. (i.e. ijb-send-banner uses this)
598 * - Implemented show-url-info interceptor. (Which is why I needed
599 * the above interceptors changes - a typical URL is
600 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
601 * The previous mechanism would not have intercepted that, and
602 * if it had been intercepted then it then it would have replaced
605 * Revision 1.12 2001/05/27 22:17:04 oes
607 * - re_process_buffer no longer writes the modified buffer
608 * to the client, which was very ugly. It now returns the
609 * buffer, which it is then written by chat.
611 * - content_length now adjusts the Content-Length: header
612 * for modified documents rather than crunch()ing it.
613 * (Length info in csp->content_length, which is 0 for
614 * unmodified documents)
616 * - For this to work, sed() is called twice when filtering.
618 * Revision 1.11 2001/05/26 17:27:53 jongfoster
619 * Added support for CLF and fixed LOG_LEVEL_LOG.
620 * Also did CRLF->LF fix of my previous patch.
622 * Revision 1.10 2001/05/26 15:26:15 jongfoster
623 * ACL feature now provides more security by immediately dropping
624 * connections from untrusted hosts.
626 * Revision 1.9 2001/05/26 00:28:36 jongfoster
627 * Automatic reloading of config file.
628 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
629 * Most of the global variables have been moved to a new
630 * struct configuration_spec, accessed through csp->config->globalname
631 * Most of the globals remaining are used by the Win32 GUI.
633 * Revision 1.8 2001/05/25 22:43:18 jongfoster
634 * Fixing minor memory leak and buffer overflow.
636 * Revision 1.7 2001/05/25 22:34:30 jongfoster
639 * Revision 1.6 2001/05/23 00:13:58 joergs
640 * AmigaOS support fixed.
642 * Revision 1.5 2001/05/22 18:46:04 oes
644 * - Enabled filtering banners by size rather than URL
645 * by adding patterns that replace all standard banner
646 * sizes with the "Junkbuster" gif to the re_filterfile
648 * - Enabled filtering WebBugs by providing a pattern
649 * which kills all 1x1 images
651 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
652 * which is selected by the (nonstandard and therefore
653 * capital) letter 'U' in the option string.
654 * It causes the quantifiers to be ungreedy by default.
655 * Appending a ? turns back to greedy (!).
657 * - Added a new interceptor ijb-send-banner, which
658 * sends back the "Junkbuster" gif. Without imagelist or
659 * MSIE detection support, or if tinygif = 1, or the
660 * URL isn't recognized as an imageurl, a lame HTML
661 * explanation is sent instead.
663 * - Added new feature, which permits blocking remote
664 * script redirects and firing back a local redirect
666 * The feature is conditionally compiled, i.e. it
667 * can be disabled with --disable-fast-redirects,
668 * plus it must be activated by a "fast-redirects"
669 * line in the config file, has its own log level
670 * and of course wants to be displayed by show-proxy-args
671 * Note: Boy, all the #ifdefs in 1001 locations and
672 * all the fumbling with configure.in and acconfig.h
673 * were *way* more work than the feature itself :-(
675 * - Because a generic redirect template was needed for
676 * this, tinygif = 3 now uses the same.
678 * - Moved GIFs, and other static HTTP response templates
683 * - Removed some >400 CRs again (Jon, you really worked
686 * Revision 1.4 2001/05/21 19:34:01 jongfoster
687 * Made failure to bind() a fatal error.
689 * Revision 1.3 2001/05/20 01:21:20 jongfoster
690 * Version 2.9.4 checkin.
691 * - Merged popupfile and cookiefile, and added control over PCRS
692 * filtering, in new "permissionsfile".
693 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
694 * file error you now get a message box (in the Win32 GUI) rather
695 * than the program exiting with no explanation.
696 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
698 * - Removed tabs from "config"
699 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
700 * - Bumped up version number.
702 * Revision 1.2 2001/05/17 22:34:44 oes
703 * - Added hint on GIF char array generation to jcc.c
704 * - Cleaned CRLF's from the sources and related files
705 * - Repaired logging for REF and FRC
707 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
708 * Initial import of version 2.9.3 source tree
711 *********************************************************************/
717 #include <sys/types.h>
725 # ifndef FEATURE_PTHREAD
729 # include <windows.h>
730 # include <process.h>
731 # endif /* ndef FEATURE_PTHREAD */
734 # ifndef _WIN_CONSOLE
736 # endif /* ndef _WIN_CONSOLE */
737 # include "w32svrapi.h"
739 #else /* ifndef _WIN32 */
741 # if !defined (__OS2__)
743 # include <sys/wait.h>
744 # endif /* ndef __OS2__ */
745 # include <sys/time.h>
746 # include <sys/stat.h>
747 # include <sys/ioctl.h>
750 #include <sys/termios.h>
761 # include <socket.h> /* BeOS has select() for sockets only. */
762 # include <OS.h> /* declarations for threads and stuff. */
765 # if defined(__EMX__) || defined(__OS2__)
766 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
771 #define bzero(B,N) memset(B,0x00,n)
786 #include "killpopup.h"
787 #include "miscutil.h"
789 #include "jbsockets.h"
794 #include "urlmatch.h"
796 const char jcc_h_rcs[] = JCC_H_VERSION;
797 const char project_h_rcs[] = PROJECT_H_VERSION;
800 struct client_state clients[1];
801 struct file_list files[1];
803 #ifdef FEATURE_STATISTICS
804 int urls_read = 0; /* total nr of urls read inc rejected */
805 int urls_rejected = 0; /* total nr of urls rejected */
806 #endif /* def FEATURE_STATISTICS */
808 #ifdef FEATURE_GRACEFUL_TERMINATION
812 static void listen_loop(void);
813 static void chat(struct client_state *csp);
815 void serve(struct client_state *csp);
816 #else /* ifndef AMIGA */
817 static void serve(struct client_state *csp);
818 #endif /* def AMIGA */
821 static int32 server_thread(void *data);
822 #endif /* def __BEOS__ */
825 #define sleep(N) Sleep(((N) * 1000))
829 #define sleep(N) DosSleep(((N) * 100))
832 #ifdef FEATURE_PTHREAD
833 pthread_mutex_t log_mutex;
834 pthread_mutex_t log_init_mutex;
836 #ifndef HAVE_GMTIME_R
837 pthread_mutex_t gmtime_mutex;
838 #endif /* ndef HAVE_GMTIME_R */
840 #ifndef HAVE_LOCALTIME_R
841 pthread_mutex_t localtime_mutex;
842 #endif /* ndef HAVE_GMTIME_R */
844 #ifndef HAVE_GETHOSTBYADDR_R
845 pthread_mutex_t gethostbyaddr_mutex;
846 #endif /* ndef HAVE_GETHOSTBYADDR_R */
848 #ifndef HAVE_GETHOSTBYNAME_R
849 pthread_mutex_t gethostbyname_mutex;
850 #endif /* ndef HAVE_GETHOSTBYNAME_R */
853 pthread_mutex_t rand_mutex;
854 #endif /* ndef HAVE_RANDOM */
856 #endif /* FEATURE_PTHREAD */
858 #if defined(unix) || defined(__EMX__)
859 const char *basedir = NULL;
860 const char *pidfile = NULL;
861 int received_hup_signal = 0;
862 #endif /* defined unix */
864 /* The vanilla wafer. */
865 static const char VANILLA_WAFER[] =
866 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
867 "Do_not_send_me_any_copyrighted_information_other_than_the_"
868 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
869 "In_particular_do_not_send_me_any_cookies_that_"
870 "are_subject_to_a_claim_of_copyright_by_anybody._"
871 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
872 "(copyright_or_otherwise)_applying_to_any_cookie._";
874 /* HTTP snipplets. */
875 const char CSUCCEED[] =
876 "HTTP/1.0 200 Connection established\n"
877 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
879 const char CHEADER[] =
880 "HTTP/1.0 400 Invalid header received from browser\r\n"
881 "Connection: close\r\n\r\n"
882 "Invalid header received from browser.";
884 const char CFORBIDDEN[] =
885 "HTTP/1.0 403 Connection not allowable\r\n"
886 "X-Hint: If you read this message interactively, then you know why this happens ,-)\r\n"
887 "Connection: close\r\n\r\n";
889 const char FTP_RESPONSE[] =
890 "HTTP/1.0 400 Invalid request received from browser\r\n"
891 "Connection: close\r\n\r\n"
892 "Invalid request. Privoxy doesn't support FTP.\r\n";
894 const char GOPHER_RESPONSE[] =
895 "HTTP/1.0 400 Invalid request received from browser\r\n"
896 "Connection: close\r\n\r\n"
897 "Invalid request. Privoxy doesn't support gopher.\r\n";
899 const char MISSING_DESTINATION_RESPONSE[] =
900 "HTTP/1.0 400 Bad request received from browser\r\n"
901 "Connection: close\r\n\r\n"
902 "Bad request. Privoxy was unable to extract the destination.\r\n";
905 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
906 /*********************************************************************
908 * Function : sig_handler
910 * Description : Signal handler for different signals.
911 * Exit gracefully on TERM and INT
912 * or set a flag that will cause the errlog
913 * to be reopened by the main thread on HUP.
916 * 1 : the_signal = the signal cause this function to call
920 *********************************************************************/
921 static void sig_handler(int the_signal)
927 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
938 received_hup_signal = 1;
943 * We shouldn't be here, unless we catch signals
944 * in main() that we can't handle here!
946 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
954 /*********************************************************************
958 * Description : Once a connection to the client has been accepted,
959 * this function is called (via serve()) to handle the
960 * main business of the communication. When this
961 * function returns, the caller must close the client
965 * 1 : csp = Current client state (buffers, headers, etc...)
967 * Returns : On success, the number of bytes written are returned (zero
968 * indicates nothing was written). On error, -1 is returned,
969 * and errno is set appropriately. If count is zero and the
970 * file descriptor refers to a regular file, 0 will be
971 * returned without causing any other effect. For a special
972 * file, the results are not portable.
974 *********************************************************************/
975 static void chat(struct client_state *csp)
978 * This next lines are a little ugly, but they simplifies the if statements
979 * below. Basically if TOGGLE, then we want the if to test if the
980 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
981 * then we want the if to test for CSP_FLAG_FORCED , else we don't
983 #ifdef FEATURE_TOGGLE
984 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
985 #else /* ifndef FEATURE_TOGGLE */
986 # define IS_TOGGLED_ON_AND
987 #endif /* ndef FEATURE_TOGGLE */
988 #ifdef FEATURE_FORCE_LOAD
989 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
990 #else /* ifndef FEATURE_FORCE_LOAD */
991 # define IS_NOT_FORCED_AND
992 #endif /* def FEATURE_FORCE_LOAD */
994 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
996 char buf[BUFFER_SIZE];
1004 int ms_iis5_hack = 0;
1006 unsigned int forwarded_connect_retries = 0;
1007 unsigned int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
1008 const struct forward_spec * fwd;
1009 struct http_request *http;
1010 int len; /* for buffer sizes */
1011 #ifdef FEATURE_KILL_POPUPS
1012 int block_popups; /* bool, 1==will block popups */
1013 int block_popups_now = 0; /* bool, 1==currently blocking popups */
1014 #endif /* def FEATURE_KILL_POPUPS */
1016 int pcrs_filter; /* bool, 1==will filter through pcrs */
1017 int gif_deanimate; /* bool, 1==will deanimate gifs */
1018 int jpeg_inspect; /* bool, 1==will inspect jpegs */
1020 /* Function that does the content filtering for the current request */
1021 char *(*content_filter)() = NULL;
1023 /* Skeleton for HTTP response, if we should intercept the request */
1024 struct http_response *rsp;
1026 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1027 struct list header_list;
1028 struct list *headers = &header_list;
1033 * Read the client's request. Note that since we're not using select() we
1034 * could get blocked here if a client connected, then didn't say anything!
1039 len = read_socket(csp->cfd, buf, sizeof(buf));
1041 if (len <= 0) break; /* error! */
1044 * If there is no memory left for buffering the
1045 * request, there is nothing we can do but hang up
1047 if (add_to_iob(csp, buf, len))
1052 req = get_header(csp);
1056 break; /* no HTTP request! */
1061 continue; /* more to come! */
1065 * If it's a FTP or gopher request, we don't support it.
1067 * These checks are better than nothing, but they might
1068 * not work in all configurations and some clients might
1069 * have problems digesting the answer.
1071 * They should, however, never cause more problems than
1072 * Privoxy's old behaviour (returning the misleading HTML error message:
1073 * "Could not resolve http://(ftp|gopher)://example.org").
1075 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1077 if (!strncmpic(req, "GET ftp://", 10))
1079 strcpy(buf, FTP_RESPONSE);
1080 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as FTP proxy: %s",
1081 csp->ip_addr_str, req);
1085 strcpy(buf, GOPHER_RESPONSE);
1086 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as gopher proxy: %s",
1087 csp->ip_addr_str, req);
1089 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1091 write_socket(csp->cfd, buf, strlen(buf));
1092 free_http_request(http);
1096 #ifdef FEATURE_FORCE_LOAD
1097 /* If this request contains the FORCE_PREFIX,
1098 * better get rid of it now and set the force flag --oes
1101 if (strstr(req, FORCE_PREFIX))
1103 strclean(req, FORCE_PREFIX);
1104 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
1105 csp->flags |= CSP_FLAG_FORCED;
1108 #endif /* def FEATURE_FORCE_LOAD */
1110 switch( parse_http_request(req, http, csp) )
1113 log_error(LOG_LEVEL_ERROR, "Out of memory while parsing request.");
1116 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", req);
1124 if (http->cmd == NULL)
1126 strcpy(buf, CHEADER);
1127 write_socket(csp->cfd, buf, strlen(buf));
1129 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
1131 free_http_request(http);
1135 /* grab the rest of the client's headers */
1139 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1141 len = read_socket(csp->cfd, buf, sizeof(buf));
1144 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1149 * If there is no memory left for buffering the
1150 * request, there is nothing we can do but hang up
1152 if (add_to_iob(csp, buf, len))
1159 if (p == NULL) break;
1166 if (http->host == NULL)
1169 * Intercepted or invalid request without domain
1170 * inside the request line. Try to get it another way.
1172 if (JB_ERR_OK == get_destination_from_headers(headers, http))
1174 /* Split the domain we just got for pattern matching */
1175 init_domain_components(http);
1179 /* We can't work without destination. Go spread the news.*/
1181 req = list_to_text(headers);
1183 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, http->cmd);
1184 log_error(LOG_LEVEL_ERROR,
1185 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1186 csp->ip_addr_str, http->cmd, req);
1189 strcpy(buf, MISSING_DESTINATION_RESPONSE);
1190 write_socket(csp->cfd, buf, strlen(buf));
1191 free_http_request(http);
1192 destroy_list(headers);
1196 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1197 * to get the destination IP address, use it as host directly
1198 * or do a reverse DNS lookup first.
1202 /* decide how to route the HTTP request */
1204 if ((fwd = forward_url(http, csp)) == NULL)
1206 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1207 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1210 /* build the http request to send to the server
1211 * we have to do one of the following:
1213 * create = use the original HTTP request to create a new
1214 * HTTP request that has either the path component
1215 * without the http://domainspec (w/path) or the
1216 * full orininal URL (w/url)
1217 * Note that the path and/or the HTTP version may
1218 * have been altered by now.
1220 * connect = Open a socket to the host:port of the server
1221 * and short-circuit server and client socket.
1223 * pass = Pass the request unchanged if forwarding a CONNECT
1224 * request to a parent proxy. Note that we'll be sending
1225 * the CFAIL message ourselves if connecting to the parent
1226 * fails, but we won't send a CSUCCEED message if it works,
1227 * since that would result in a double message (ours and the
1228 * parent's). After sending the request to the parent, we simply
1231 * here's the matrix:
1234 * +--------+--------+
1236 * 0 | create | connect|
1238 * Forwarding +--------+--------+
1240 * 1 | create | pass |
1242 * +--------+--------+
1247 * Determine the actions for this URL
1249 #ifdef FEATURE_TOGGLE
1250 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1252 /* Most compatible set of actions (i.e. none) */
1253 init_current_action(csp->action);
1256 #endif /* ndef FEATURE_TOGGLE */
1258 url_actions(http, csp);
1263 * Check if a CONNECT request is allowable:
1264 * In the absence of a +limit-connect action, allow only port 443.
1265 * If there is an action, allow whatever matches the specificaton.
1269 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
1270 || (csp->action->flags & ACTION_LIMIT_CONNECT
1271 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
1273 if (csp->action->flags & ACTION_TREAT_FORBIDDEN_CONNECTS_LIKE_BLOCKS)
1275 /* The response will violate the specs, but makes unblocking easier. */
1276 log_error(LOG_LEVEL_ERROR, "Marking suspicious CONNECT request from %s for blocking.",
1278 csp->action->flags |= ACTION_BLOCK;
1283 strcpy(buf, CFORBIDDEN);
1284 write_socket(csp->cfd, buf, strlen(buf));
1285 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
1286 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
1294 * Downgrade http version from 1.1 to 1.0 if +downgrade
1297 if ( (http->ssl == 0)
1298 && (!strcmpic(http->ver, "HTTP/1.1"))
1299 && (csp->action->flags & ACTION_DOWNGRADE))
1302 http->ver = strdup("HTTP/1.0");
1304 if (http->ver == NULL)
1306 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1311 * Save a copy of the original request for logging
1313 http->ocmd = strdup(http->cmd);
1315 if (http->ocmd == NULL)
1317 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
1321 * (Re)build the HTTP request for non-SSL requests.
1322 * If forwarding, use the whole URL, else, use only the path.
1328 http->cmd = strdup(http->gpc);
1329 string_append(&http->cmd, " ");
1331 if (fwd->forward_host)
1333 string_append(&http->cmd, http->url);
1337 string_append(&http->cmd, http->path);
1339 string_append(&http->cmd, " ");
1340 string_append(&http->cmd, http->ver);
1342 if (http->cmd == NULL)
1344 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1346 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", http->cmd);
1348 enlist(csp->headers, http->cmd);
1350 /* Append the previously read headers */
1351 list_append_list_unique(csp->headers, headers);
1352 destroy_list(headers);
1355 * If the user has not supplied any wafers, and the user has not
1356 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1358 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1359 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1361 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1365 #ifdef FEATURE_KILL_POPUPS
1366 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
1367 #endif /* def FEATURE_KILL_POPUPS */
1369 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
1370 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
1372 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
1374 jpeg_inspect = ((csp->action->flags & ACTION_JPEG_INSPECT) != 0);
1377 * We have a request. Now, check to see if we need to
1378 * intercept it, i.e. If ..
1382 /* We may not forward the request by rfc2616 sect 14.31 */
1383 (NULL != (rsp = direct_response(csp)))
1385 /* or we are enabled and... */
1386 || (IS_ENABLED_AND (
1388 /* ..the request was blocked */
1389 ( NULL != (rsp = block_url(csp)))
1391 /* ..or untrusted */
1392 #ifdef FEATURE_TRUST
1393 || ( NULL != (rsp = trust_url(csp)))
1394 #endif /* def FEATURE_TRUST */
1396 /* ..or a redirect kicked in */
1397 || ( NULL != (rsp = redirect_url(csp)))
1401 * .. or a CGI call was detected and answered.
1403 * This check comes last to give the user the power
1404 * to deny acces to some (or all) of the cgi pages.
1406 || (NULL != (rsp = dispatch_cgi(csp)))
1410 /* Write the answer to the client */
1411 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1412 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1414 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1417 #ifdef FEATURE_STATISTICS
1418 /* Count as a rejected request */
1419 csp->flags |= CSP_FLAG_REJECTED;
1420 #endif /* def FEATURE_STATISTICS */
1422 /* Log (FIXME: All intercept reasons appear as "crunch" with Status 200) */
1423 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
1424 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
1426 /* Clean up and return */
1427 free_http_response(rsp);
1431 hdr = sed(client_patterns, add_client_headers, csp);
1434 /* FIXME Should handle error properly */
1435 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1438 list_remove_all(csp->headers);
1440 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1442 if (fwd->forward_host)
1444 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1445 fwd->forward_host, fwd->forward_port, http->hostport);
1449 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1452 /* here we connect to the server, gateway, or the forwarder */
1454 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
1455 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
1457 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
1458 forwarded_connect_retries, http->hostport);
1461 if (csp->sfd == JB_INVALID_SOCKET)
1463 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1466 if (errno == EINVAL)
1468 rsp = error_response(csp, "no-such-domain", errno);
1470 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
1471 csp->ip_addr_str, http->ocmd);
1475 rsp = error_response(csp, "connect-failed", errno);
1477 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1478 csp->ip_addr_str, http->ocmd);
1482 /* Write the answer to the client */
1485 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1486 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1488 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1492 free_http_response(rsp);
1497 log_error(LOG_LEVEL_CONNECT, "OK");
1499 if (fwd->forward_host || (http->ssl == 0))
1501 /* write the client's (modified) header to the server
1502 * (along with anything else that may be in the buffer)
1505 if (write_socket(csp->sfd, hdr, strlen(hdr))
1506 || (flush_socket(csp->sfd, csp) < 0))
1508 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1511 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1512 csp->ip_addr_str, http->ocmd);
1514 rsp = error_response(csp, "connect-failed", errno);
1518 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1519 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1521 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1525 free_http_response(rsp);
1533 * We're running an SSL tunnel and we're not forwarding,
1534 * so just send the "connect succeeded" message to the
1535 * client, flush the rest, and get out of the way.
1537 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1538 csp->ip_addr_str, http->ocmd);
1540 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
1548 /* we're finished with the client's header */
1551 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1553 /* pass data between the client and server
1554 * until one or the other shuts down the connection.
1563 * FD_ZERO here seems to point to an errant macro which crashes.
1564 * So do this by hand for now...
1566 memset(&rfds,0x00,sizeof(fd_set));
1570 FD_SET(csp->cfd, &rfds);
1571 FD_SET(csp->sfd, &rfds);
1573 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
1577 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1581 /* this is the body of the browser's request
1582 * just read it and write it.
1585 if (FD_ISSET(csp->cfd, &rfds))
1587 len = read_socket(csp->cfd, buf, sizeof(buf));
1591 break; /* "game over, man" */
1594 if (write_socket(csp->sfd, buf, (size_t)len))
1596 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1603 * The server wants to talk. It could be the header or the body.
1604 * If `hdr' is null, then it's the header otherwise it's the body.
1605 * FIXME: Does `hdr' really mean `host'? No.
1609 if (FD_ISSET(csp->sfd, &rfds))
1612 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1616 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1618 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1619 csp->ip_addr_str, http->ocmd);
1621 rsp = error_response(csp, "connect-failed", errno);
1625 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1626 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1628 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1632 free_http_response(rsp);
1636 /* Add a trailing zero. This lets filter_popups
1637 * use string operations.
1641 #ifdef FEATURE_KILL_POPUPS
1642 /* Filter the popups on this read. */
1643 if (block_popups_now)
1645 filter_popups(buf, csp);
1647 #endif /* def FEATURE_KILL_POPUPS */
1649 /* Normally, this would indicate that we've read
1650 * as much as the server has sent us and we can
1651 * close the client connection. However, Microsoft
1652 * in its wisdom has released IIS/5 with a bug that
1653 * prevents it from sending the trailing \r\n in
1654 * a 302 redirect header (and possibly other headers).
1655 * To work around this if we've haven't parsed
1656 * a full header we'll append a trailing \r\n
1657 * and see if this now generates a valid one.
1659 * This hack shouldn't have any impacts. If we've
1660 * already transmitted the header or if this is a
1661 * SSL connection, then we won't bother with this
1662 * hack. So we only work on partially received
1663 * headers. If we append a \r\n and this still
1664 * doesn't generate a valid header, then we won't
1665 * transmit anything to the client.
1670 if (server_body || http->ssl)
1673 * If we have been buffering up the document,
1674 * now is the time to apply content modification
1675 * and send the result to the client.
1680 * If the content filter fails, use the original
1681 * buffer and length.
1682 * (see p != NULL ? p : csp->iob->cur below)
1684 if (NULL == (p = (*content_filter)(csp)))
1686 csp->content_length = csp->iob->eod - csp->iob->cur;
1689 hdr = sed(server_patterns_light, NULL, csp);
1693 /* FIXME Should handle error properly */
1694 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1697 if (write_socket(csp->cfd, hdr, strlen(hdr))
1698 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
1700 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1710 break; /* "game over, man" */
1714 * This is NOT the body, so
1715 * Let's pretend the server just sent us a blank line.
1717 len = sprintf(buf, "\r\n");
1720 * Now, let the normal header parsing algorithm below do its
1721 * job. If it fails, we'll exit instead of continuing.
1728 * If this is an SSL connection or we're in the body
1729 * of the server document, just write it to the client,
1730 * unless we need to buffer the body for later content-filtering
1733 if (server_body || http->ssl)
1738 * If there is no memory left for buffering the content, or the buffer limit
1739 * has been reached, switch to non-filtering mode, i.e. make & write the
1740 * header, flush the iob and buf, and get out of the way.
1742 if (add_to_iob(csp, buf, len))
1747 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
1749 hdr = sed(server_patterns, add_server_headers, csp);
1753 * Memory is too tight to even generate the header.
1754 * Send our static "Out-of-memory" page.
1756 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
1757 rsp = cgi_error_memory();
1759 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1760 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1762 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1767 hdrlen = strlen(hdr);
1769 if (write_socket(csp->cfd, hdr, hdrlen)
1770 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
1771 || (write_socket(csp->cfd, buf, (size_t) len)))
1773 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
1779 byte_count += hdrlen + flushed + len;
1781 content_filter = NULL;
1788 if (write_socket(csp->cfd, buf, (size_t)len))
1790 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
1799 /* we're still looking for the end of the
1800 * server's header ... (does that make header
1801 * parsing an "out of body experience" ?
1805 * buffer up the data we just read. If that fails,
1806 * there's little we can do but send our static
1807 * out-of-memory page.
1809 if (add_to_iob(csp, buf, len))
1811 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
1812 rsp = cgi_error_memory();
1814 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1815 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1817 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1822 /* get header lines from the iob */
1824 while ((p = get_header(csp)) != NULL)
1828 /* see following note */
1831 enlist(csp->headers, p);
1835 /* NOTE: there are no "empty" headers so
1836 * if the pointer `p' is not NULL we must
1837 * assume that we reached the end of the
1838 * buffer before we hit the end of the header.
1845 /* Well, we tried our MS IIS/5
1846 * hack and it didn't work.
1847 * The header is incomplete
1848 * and there isn't anything
1849 * we can do about it.
1855 /* Since we have to wait for
1856 * more from the server before
1857 * we can parse the headers
1858 * we just continue here.
1864 /* we have now received the entire header.
1865 * filter it and send the result to the client
1868 hdr = sed(server_patterns, add_server_headers, csp);
1871 /* FIXME Should handle error properly */
1872 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1875 #ifdef FEATURE_KILL_POPUPS
1876 /* Start blocking popups if appropriate. */
1878 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1879 !http->ssl && /* We talk plaintext */
1880 block_popups) /* Policy allows */
1882 block_popups_now = 1;
1884 * Filter the part of the body that came in the same read
1885 * as the last headers:
1887 filter_popups(csp->iob->cur, csp);
1890 #endif /* def FEATURE_KILL_POPUPS */
1892 /* Buffer and pcrs filter this if appropriate. */
1894 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1895 !http->ssl && /* We talk plaintext */
1896 pcrs_filter) /* Policy allows */
1898 content_filter = pcrs_filter_response;
1901 /* Buffer and gif_deanimate this if appropriate. */
1903 if ((csp->content_type & CT_GIF) && /* It's an image/gif MIME-Type */
1904 !http->ssl && /* We talk plaintext */
1905 gif_deanimate) /* Policy allows */
1907 content_filter = gif_deanimate_response;
1910 /* Buffer and jpg_inspect this if appropriate. */
1912 if ((csp->content_type & CT_JPEG) && /* It's an image/jpeg MIME-Type */
1913 !http->ssl && /* We talk plaintext */
1914 jpeg_inspect) /* Policy allows */
1916 content_filter = jpeg_inspect_response;
1920 * Only write if we're not buffering for content modification
1922 if (!content_filter)
1924 /* write the server's (modified) header to
1925 * the client (along with anything else that
1926 * may be in the buffer)
1929 if (write_socket(csp->cfd, hdr, strlen(hdr))
1930 || ((len = flush_socket(csp->cfd, csp)) < 0))
1932 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1934 /* the write failed, so don't bother
1935 * mentioning it to the client...
1936 * it probably can't hear us anyway.
1945 /* we're finished with the server's header */
1950 /* If this was a MS IIS/5 hack then it means
1951 * the server has already closed the
1952 * connection. Nothing more to read. Time
1963 return; /* huh? we should never get here */
1966 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
1967 csp->ip_addr_str, http->ocmd, byte_count);
1971 /*********************************************************************
1975 * Description : This is little more than chat. We only "serve" to
1976 * to close any socket that chat may have opened.
1979 * 1 : csp = Current client state (buffers, headers, etc...)
1983 *********************************************************************/
1985 void serve(struct client_state *csp)
1986 #else /* ifndef AMIGA */
1987 static void serve(struct client_state *csp)
1988 #endif /* def AMIGA */
1991 close_socket(csp->cfd);
1993 if (csp->sfd != JB_INVALID_SOCKET)
1995 close_socket(csp->sfd);
1998 csp->flags &= ~CSP_FLAG_ACTIVE;
2004 /*********************************************************************
2006 * Function : server_thread
2008 * Description : We only exist to call `serve' in a threaded environment.
2011 * 1 : data = Current client state (buffers, headers, etc...)
2013 * Returns : Always 0.
2015 *********************************************************************/
2016 static int32 server_thread(void *data)
2018 serve((struct client_state *) data);
2025 /*********************************************************************
2029 * Description : Print usage info & exit.
2031 * Parameters : Pointer to argv[0] for identifying ourselves
2035 *********************************************************************/
2036 void usage(const char *myname)
2038 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
2040 "Usage: %s [--help] [--version] [configfile]\n"
2042 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
2044 "Aborting.\n", myname);
2051 /*********************************************************************
2055 * Description : Load the config file and start the listen loop.
2056 * This function is a lot more *sane* with the `load_config'
2057 * and `listen_loop' functions; although it stills does
2058 * a *little* too much for my taste.
2061 * 1 : argc = Number of parameters (including $0).
2062 * 2 : argv = Array of (char *)'s to the parameters.
2064 * Returns : 1 if : can't open config file, unrecognized directive,
2065 * stats requested in multi-thread mode, can't open the
2066 * log file, can't open the jar file, listen port is invalid,
2067 * any load fails, and can't bind port.
2069 * Else main never returns, the process must be signaled
2070 * to terminate execution. Or, on Windows, use the
2071 * "File", "Exit" menu option.
2073 *********************************************************************/
2075 int real_main(int argc, const char *argv[])
2077 int main(int argc, const char *argv[])
2083 struct passwd *pw = NULL;
2084 struct group *grp = NULL;
2093 #if !defined(_WIN32)
2101 * Parse the command line arguments
2103 while (++argc_pos < argc)
2106 /* Check to see if the service must be installed or uninstalled */
2107 if (strncmp(argv[argc_pos], "--install", 9) == 0)
2109 const char *pName = argv[argc_pos] + 9;
2112 exit( (install_service(pName)) ? 0 : 1 );
2114 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
2116 const char *pName = argv[argc_pos] + 11;
2119 exit((uninstall_service(pName)) ? 0 : 1);
2121 else if (strcmp(argv[argc_pos], "--service" ) == 0)
2123 bRunAsService = TRUE;
2124 w32_set_service_cwd();
2125 atexit(w32_service_exit_notify);
2128 #endif /* defined(_WIN32) */
2131 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2133 if (strcmp(argv[argc_pos], "--help") == 0)
2138 else if(strcmp(argv[argc_pos], "--version") == 0)
2140 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
2146 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
2151 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
2153 if (++argc_pos == argc) usage(argv[0]);
2154 pidfile = strdup(argv[argc_pos]);
2157 else if (strcmp(argv[argc_pos], "--user" ) == 0)
2159 if (++argc_pos == argc) usage(argv[argc_pos]);
2161 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
2164 if (NULL == (grp = getgrnam(p)))
2166 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
2170 if (NULL == (pw = getpwnam(argv[argc_pos])))
2172 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
2175 if (p != NULL) *--p = '\0';
2178 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
2183 #endif /* defined(unix) */
2184 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
2186 configfile = argv[argc_pos];
2189 } /* -END- while (more arguments) */
2192 if ( *configfile != '/' )
2194 char *abs_file, cwd[1024];
2196 /* make config-filename absolute here */
2197 if ( !(getcwd(cwd, sizeof(cwd))))
2199 perror("get working dir failed");
2203 if (!(basedir = strdup(cwd))
2204 || (!(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))))
2206 perror("malloc failed");
2209 strcpy( abs_file, basedir );
2210 strcat( abs_file, "/" );
2211 strcat( abs_file, configfile );
2212 configfile = abs_file;
2214 #endif /* defined unix */
2218 clients->next = NULL;
2222 #elif defined(_WIN32)
2226 #ifdef FEATURE_PTHREAD
2228 * Prepare global mutex semaphores
2230 pthread_mutex_init(&log_mutex,0);
2231 pthread_mutex_init(&log_init_mutex,0);
2233 #ifndef HAVE_GMTIME_R
2234 pthread_mutex_init(&gmtime_mutex,0);
2235 #endif /* ndef HAVE_GMTIME_R */
2237 #ifndef HAVE_LOCALTIME_R
2238 pthread_mutex_init(&localtime_mutex,0);
2239 #endif /* ndef HAVE_GMTIME_R */
2241 #ifndef HAVE_GETHOSTBYADDR_R
2242 pthread_mutex_init(&gethostbyaddr_mutex,0);
2243 #endif /* ndef HAVE_GETHOSTBYADDR_R */
2245 #ifndef HAVE_GETHOSTBYNAME_R
2246 pthread_mutex_init(&gethostbyname_mutex,0);
2247 #endif /* ndef HAVE_GETHOSTBYNAME_R */
2250 pthread_mutex_init(&rand_mutex,0);
2251 #endif /* ndef HAVE_RANDOM */
2253 #endif /* FEATURE_PTHREAD */
2255 random_seed = (int)time(NULL);
2257 srandom(random_seed);
2260 #endif /* ifdef HAVE_RANDOM */
2263 * Unix signal handling
2265 * Catch the abort, interrupt and terminate signals for a graceful exit
2266 * Catch the hangup signal so the errlog can be reopened.
2267 * Ignore the broken pipe signals (FIXME: Why?)
2269 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
2272 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
2273 const int ignored_signals[] = { SIGPIPE, 0 };
2275 for (idx = 0; catched_signals[idx] != 0; idx++)
2277 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
2278 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
2280 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
2281 #endif /* ifdef sun */
2283 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
2287 for (idx = 0; ignored_signals[idx] != 0; idx++)
2289 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
2291 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
2296 #else /* ifdef _WIN32 */
2297 # ifdef _WIN_CONSOLE
2299 * We *are* in a windows console app.
2300 * Print a verbose messages about FAQ's and such
2302 printf(win32_blurb);
2303 # endif /* def _WIN_CONSOLE */
2304 #endif /* def _WIN32 */
2307 /* Initialize the CGI subsystem */
2308 cgi_init_error_messages();
2311 * If runnig on unix and without the --nodaemon
2312 * option, become a daemon. I.e. fork, detach
2313 * from tty and get process group leadership
2326 if ( pid < 0 ) /* error */
2331 else if ( pid != 0 ) /* parent */
2336 * must check for errors
2337 * child died due to missing files aso
2340 wpid = waitpid( pid, &status, WNOHANG );
2349 /* Should be more portable, but not as well tested */
2354 #else /* ndef __FreeBSD__ */
2356 #endif /* ndef __FreeBSD__ */
2357 fd = open("/dev/tty", O_RDONLY);
2360 /* no error check here */
2361 ioctl( fd, TIOCNOTTY,0 );
2365 /* FIXME: should close stderr (fd 2) here too, but the test
2367 * and load config file is done in listen_loop() and puts
2368 * some messages on stderr there.
2375 } /* -END- if (!no_daemon) */
2378 * As soon as we have written the PID file, we can switch
2379 * to the user and group ID indicated by the --user option
2385 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
2387 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
2393 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
2395 if (chroot(pw->pw_dir) < 0)
2397 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
2401 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
2404 if (setuid(pw->pw_uid))
2406 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
2410 char putenv_dummy[64];
2412 strcpy(putenv_dummy, "HOME=/");
2413 if (putenv(putenv_dummy) != 0)
2415 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
2418 snprintf(putenv_dummy, 64, "USER=%s", pw->pw_name);
2419 if (putenv(putenv_dummy) != 0)
2421 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
2427 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
2430 #endif /* defined unix */
2433 /* This will be FALSE unless the command line specified --service
2437 /* Yup, so now we must attempt to establish a connection
2438 * with the service dispatcher. This will only work if this
2439 * process was launched by the service control manager to
2440 * actually run as a service. If this isn't the case, i've
2441 * known it take around 30 seconds or so for the call to return.
2444 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
2445 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
2447 /* Service has run, and at this point is now being stopped, so just return */
2452 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
2454 /* An error occurred. Usually it's because --service was wrongly specified
2455 * and we were unable to connect to the Service Control Dispatcher because
2456 * it wasn't expecting us and is therefore not listening.
2458 * For now, just continue below to call the listen_loop function.
2461 #endif /* def _WIN32 */
2471 /*********************************************************************
2473 * Function : bind_port_helper
2475 * Description : Bind the listen port. Handles logging, and aborts
2479 * 1 : config = Privoxy configuration. Specifies port
2482 * Returns : Port that was opened.
2484 *********************************************************************/
2485 static jb_socket bind_port_helper(struct configuration_spec * config)
2490 if ( (config->haddr != NULL)
2491 && (config->haddr[0] == '1')
2492 && (config->haddr[1] == '2')
2493 && (config->haddr[2] == '7')
2494 && (config->haddr[3] == '.') )
2496 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
2499 else if (config->haddr == NULL)
2501 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
2506 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
2507 config->hport, config->haddr);
2510 result = bind_port(config->haddr, config->hport, &bfd);
2517 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2518 "There may be another Privoxy or some other "
2519 "proxy running on port %d",
2520 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
2521 config->hport, config->hport);
2524 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2525 "The hostname is not resolvable",
2526 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2529 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
2530 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2533 /* shouldn't get here */
2534 return JB_INVALID_SOCKET;
2537 config->need_bind = 0;
2544 /* Without this simple workaround we get this compiler warning from _beginthread
2545 * warning C4028: formal parameter 1 different from declaration
2547 void w32_service_listen_loop(void *p)
2551 #endif /* def _WIN32 */
2554 /*********************************************************************
2556 * Function : listen_loop
2558 * Description : bind the listen port and enter a "FOREVER" listening loop.
2564 *********************************************************************/
2565 static void listen_loop(void)
2567 struct client_state *csp = NULL;
2569 struct configuration_spec * config;
2571 config = load_config();
2573 bfd = bind_port_helper(config);
2575 #ifdef FEATURE_GRACEFUL_TERMINATION
2576 while (!g_terminate)
2581 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
2582 while (waitpid(-1, NULL, WNOHANG) > 0)
2584 /* zombie children */
2586 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
2589 * Free data that was used by died threads
2595 * Re-open the errlog after HUP signal
2597 if (received_hup_signal)
2599 init_error_log(Argv[0], config->logfile, config->debug);
2600 received_hup_signal = 0;
2605 #ifdef FEATURE_COOKIE_JAR
2607 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
2608 * already open. I think unload_configfile() is not being run, which should do
2609 * this work. Until that can get resolved, we'll use this workaround.
2613 if (csp->config->jar)
2615 fclose(csp->config->jar);
2616 csp->config->jar = NULL;
2618 #endif /* FEATURE_COOKIE_JAR */
2619 #endif /* __OS2__ */
2621 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
2623 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
2627 csp->flags |= CSP_FLAG_ACTIVE;
2628 csp->sfd = JB_INVALID_SOCKET;
2630 csp->config = config = load_config();
2632 if ( config->need_bind )
2635 * Since we were listening to the "old port", we will not see
2636 * a "listen" param change until the next IJB request. So, at
2637 * least 1 more request must be made for us to find the new
2638 * setting. I am simply closing the old socket and binding the
2641 * Which-ever is correct, we will serve 1 more page via the
2642 * old settings. This should probably be a "show-proxy-args"
2643 * request. This should not be a so common of an operation
2644 * that this will hurt people's feelings.
2649 bfd = bind_port_helper(config);
2652 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
2654 if (!accept_connection(csp, bfd))
2656 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
2669 log_error(LOG_LEVEL_CONNECT, "OK");
2672 #ifdef FEATURE_TOGGLE
2673 if (global_toggle_state)
2675 csp->flags |= CSP_FLAG_TOGGLED_ON;
2677 #endif /* def FEATURE_TOGGLE */
2679 if (run_loader(csp))
2681 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
2682 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2686 if (block_acl(NULL,csp))
2688 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
2689 close_socket(csp->cfd);
2693 #endif /* def FEATURE_ACL */
2695 /* add it to the list of clients */
2696 csp->next = clients->next;
2697 clients->next = csp;
2699 if (config->multi_threaded)
2703 /* this is a switch () statment in the C preprocessor - ugh */
2704 #undef SELECTED_ONE_OPTION
2706 /* Use Pthreads in preference to native code */
2707 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
2708 #define SELECTED_ONE_OPTION
2710 pthread_t the_thread;
2711 pthread_attr_t attrs;
2713 pthread_attr_init(&attrs);
2714 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
2715 errno = pthread_create(&the_thread, &attrs,
2717 child_id = errno ? -1 : 0;
2718 pthread_attr_destroy(&attrs);
2722 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
2723 #define SELECTED_ONE_OPTION
2724 child_id = _beginthread(
2725 (void (*)(void *))serve,
2730 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
2731 #define SELECTED_ONE_OPTION
2732 child_id = _beginthread(
2733 (void(* _Optlink)(void*))serve,
2739 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
2740 #define SELECTED_ONE_OPTION
2742 thread_id tid = spawn_thread
2743 (server_thread, "server", B_NORMAL_PRIORITY, csp);
2745 if ((tid >= 0) && (resume_thread(tid) == B_OK))
2747 child_id = (int) tid;
2756 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2757 #define SELECTED_ONE_OPTION
2758 csp->cfd = ReleaseSocket(csp->cfd, -1);
2760 if((child_id = (int)CreateNewProcTags(
2761 NP_Entry, (ULONG)server_thread,
2762 NP_Output, Output(),
2763 NP_CloseOutput, FALSE,
2764 NP_Name, (ULONG)"privoxy child",
2765 NP_StackSize, 200*1024,
2769 ((struct Task *)child_id)->tc_UserData = csp;
2770 Signal((struct Task *)child_id, SIGF_SINGLE);
2775 #if !defined(SELECTED_ONE_OPTION)
2778 /* This block is only needed when using fork().
2779 * When using threads, the server thread was
2780 * created and run by the call to _beginthread().
2782 if (child_id == 0) /* child */
2785 #ifdef FEATURE_TOGGLE
2786 int inherited_toggle_state = global_toggle_state;
2787 #endif /* def FEATURE_TOGGLE */
2792 * If we've been toggled or we've blocked the request, tell Mom
2795 #ifdef FEATURE_TOGGLE
2796 if (inherited_toggle_state != global_toggle_state)
2798 rc |= RC_FLAG_TOGGLED;
2800 #endif /* def FEATURE_TOGGLE */
2802 #ifdef FEATURE_STATISTICS
2803 if (csp->flags & CSP_FLAG_REJECTED)
2805 rc |= RC_FLAG_BLOCKED;
2807 #endif /* ndef FEATURE_STATISTICS */
2811 else if (child_id > 0) /* parent */
2813 /* in a fork()'d environment, the parent's
2814 * copy of the client socket and the CSP
2818 #if !defined(_WIN32) && !defined(__CYGWIN__)
2820 wait( &child_status );
2823 * Evaluate child's return code: If the child has
2824 * - been toggled, toggle ourselves
2825 * - blocked its request, bump up the stats counter
2828 #ifdef FEATURE_TOGGLE
2829 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
2831 global_toggle_state = !global_toggle_state;
2833 #endif /* def FEATURE_TOGGLE */
2835 #ifdef FEATURE_STATISTICS
2837 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
2841 #endif /* def FEATURE_STATISTICS */
2843 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
2844 close_socket(csp->cfd);
2845 csp->flags &= ~CSP_FLAG_ACTIVE;
2849 #undef SELECTED_ONE_OPTION
2850 /* end of cpp switch () */
2852 if (child_id < 0) /* failed */
2854 char buf[BUFFER_SIZE];
2856 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
2858 sprintf(buf , "Privoxy: can't fork: errno = %d", errno);
2860 write_socket(csp->cfd, buf, strlen(buf));
2861 close_socket(csp->cfd);
2862 csp->flags &= ~CSP_FLAG_ACTIVE;
2873 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
2875 /* Clean up. Aim: free all memory (no leaks) */
2876 #ifdef FEATURE_GRACEFUL_TERMINATION
2878 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
2880 unload_current_config_file();
2881 unload_current_actions_file();
2882 unload_current_re_filterfile();
2883 #ifdef FEATURE_TRUST
2884 unload_current_trust_file();
2887 if (config->multi_threaded)
2894 } while ((clients->next != NULL) && (--i > 0));
2898 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
2909 #ifdef FEATURE_COOKIE_JAR
2910 if (NULL != config->jar)
2912 fclose(config->jar);
2916 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
2917 /* Cleanup - remove taskbar icon etc. */
2922 #endif /* FEATURE_GRACEFUL_TERMINATION */