1 const char jcc_rcs[] = "$Id: jcc.c,v 1.110 2006/12/13 14:52:53 etresoft 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 1.110 2006/12/13 14:52:53 etresoft
37 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
39 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
40 * Privoxy is now able to run as intercepting
41 * proxy in combination with any packet filter
42 * that does the port redirection. The destination
43 * is extracted from the "Host:" header which
44 * should be available for nearly all requests.
46 * Moved HTTP snipplets into jcc.c.
47 * Added error message for gopher proxy requests.
49 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
50 * Only unlink the pidfile if it's actually used.
52 * Change order of interception checks to make
53 * it possible to block or redirect requests for
56 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
57 * Make pthread mutex locking more generic. Instead of
58 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
59 * and use mutex locking unless there is an _r function
60 * available. Better safe than sorry.
62 * Fixes "./configure --disable-pthread" and should result
63 * in less threading-related problems on pthread-using platforms,
64 * but it still doesn't fix BR#1122404.
66 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
67 * Move pthread.h inclusion from jcc.c to jcc.h.
68 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
70 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
71 * Don't exit after receiving the second SIGHUP on Solaris.
73 * Fixes BR 1052235, but the same problem may exist on other
74 * systems. Once 3.0.6 is out we should use sigset()
75 * where available and see if it breaks anything.
77 * Revision 1.104 2006/09/23 13:26:38 roro
78 * Replace TABs by spaces in source code.
80 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
81 * Fix +redirect{}. Didn't work with -fast-redirects.
83 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
84 * Respond with 400 and a short text message
85 * if the client tries to use Privoxy as FTP proxy.
87 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
88 * Make number of retries in case of forwarded-connect problems
89 * a config file option (forwarded-connect-retries) and use 0 as
92 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
95 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
96 * Follow the OpenBSD port's lead and protect the resolve
97 * functions on OpenBSD as well.
99 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
100 * --user fix. Only use the user as group if no group is specified.
101 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
103 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
104 * Windows service (re-)integration
108 * --install[:service_name]
109 * --uninstall[:service_name]
112 * They work as follows:
113 * --install will create a service for you and then terminate.
114 * By default the service name will be "privoxy" (without the quotes).
115 * However you can run multiple services if you wish, just by adding
116 * a colon and then a name (no spaces).
118 * --uninstall follows the exact same rules a --install.
120 * --service is used when the program is executed by the service
121 * control manager, and in normal circumstances would never be
122 * used as a command line argument.
124 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
125 * Windows service integration
127 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
128 * Incorporate Fabian Keil's patch work:
129 http://www.fabiankeil.de/sourcecode/privoxy/
131 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
132 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
133 * with what was really the latest development (the v_3_0_branch branch)
135 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
136 * Thanks to Jindrich Makovicka for a race condition fix for the log
137 * file. The race condition remains for non-pthread implementations.
138 * Reference patch #1175720.
140 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
141 * Add the ability to check jpeg images for invalid
142 * lengths of comment blocks. Defensive strategy
143 * against the exploit:
144 * Microsoft Security Bulletin MS04-028
145 * Buffer Overrun in JPEG Processing (GDI+) Could
146 * Allow Code Execution (833987)
147 * Enabled with +inspect-jpegs in actions files.
149 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
150 * - Fixed usage info for non-unix platforms
151 * - Fixed small cmdline parsing bug
153 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
154 * Diagnostics: Now preserve the returncode of pthread_create
155 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
157 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
158 * No longer ignore SIGCHLD. Fixes bug #769381
160 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
161 * Close jarfile on graceful exit, remove stray line
163 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
164 * Cosmetics: Killed a warning, a typo and an allocation left at exit
166 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
167 * No longer rely on non-POSIX.1 extensions of getcwd().
170 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
171 * Replaced setenv() by posix-compliant putenv()
172 * Thanks to Neil McCalden (nmcc AT users.sf.net).
174 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
175 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
177 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
178 * Clean-up and extension of improvements for forked mode:
179 * - Child's return code now consists of flags RC_FLAG_*
180 * - Reporting toggle to parent now properly #ifdef'ed
181 * - Children now report blocking to parent. This enables
182 * statistics in forked mode
184 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
185 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
186 * Children now report having been toggled through _exit(17), parents
187 * watch for that code and toggle themselves if found.
189 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
190 * Wrapping all *_r functions (the non-_r versions of them) with
191 * mutex semaphores for OSX. Hopefully this will take care of all
192 * of those pesky crash reports.
194 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
195 * Fixed two mostly harmless mem leaks
197 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
198 * Fix: Head of global clients list now initialized to NULL
200 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
201 * Added basic support for OPTIONS and TRACE HTTP methods:
202 * - New interceptor direct_response() added in chat().
203 * - sed() moved to earlier in the process, so that the
204 * Host: header is evaluated before actions and forwarding
207 * Revision 1.92 2002/05/08 16:00:46 oes
208 * Chat's buffer handling:
209 * - Fixed bug with unchecked out-of-mem conditions
210 * while reading client request & server headers
211 * - No longer predict if the buffer limit will be exceeded
212 * in the next read -- check add_to_iob's new
213 * return code. If buffer couldn't be extended
214 * (policy or out-of-mem) while
215 * - reading from client: abort
216 * - reading server headers: send error page
217 * - buffering server body for filter: flush,
218 * and if that fails: send error page
220 * Revision 1.91 2002/04/08 20:35:58 swa
223 * Revision 1.90 2002/04/02 14:57:28 oes
224 * Made sending wafers independent of FEATURE_COOKIE_JAR
226 * Revision 1.89 2002/03/31 17:18:59 jongfoster
227 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
229 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
230 * More compiler warning message maintenance
232 * Revision 1.87 2002/03/26 22:29:54 swa
233 * we have a new homepage!
235 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
236 * Workaround for closing the jarfile before load_config() comes around again
238 * Revision 1.85 2002/03/24 15:23:33 jongfoster
241 * Revision 1.84 2002/03/24 13:25:43 swa
242 * name change related issues
244 * Revision 1.83 2002/03/16 23:54:06 jongfoster
245 * Adding graceful termination feature, to help look for memory leaks.
246 * If you enable this (which, by design, has to be done by hand
247 * editing config.h) and then go to http://i.j.b/die, then the program
248 * will exit cleanly after the *next* request. It should free all the
249 * memory that was used.
251 * Revision 1.82 2002/03/13 00:27:05 jongfoster
254 * Revision 1.81 2002/03/12 01:42:50 oes
255 * Introduced modular filters
257 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
258 * OS/2 port maintenance:
259 * - Fixed EMX build - it had decayed a little
260 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
261 * substituted a memset for now.
263 * Revision 1.79 2002/03/09 20:03:52 jongfoster
264 * - Making various functions return int rather than size_t.
265 * (Undoing a recent change). Since size_t is unsigned on
266 * Windows, functions like read_socket that return -1 on
267 * error cannot return a size_t.
269 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
270 * crashes, and also frequently caused JB to jump to 100%
271 * CPU and stay there. (Because it thought it had just
272 * read ((unsigned)-1) == 4Gb of data...)
274 * - The signature of write_socket has changed, it now simply
275 * returns success=0/failure=nonzero.
277 * - Trying to get rid of a few warnings --with-debug on
278 * Windows, I've introduced a new type "jb_socket". This is
279 * used for the socket file descriptors. On Windows, this
280 * is SOCKET (a typedef for unsigned). Everywhere else, it's
281 * an int. The error value can't be -1 any more, so it's
282 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
283 * Windows it maps to the #define INVALID_SOCKET.)
285 * - The signature of bind_port has changed.
287 * Revision 1.78 2002/03/08 21:35:04 oes
288 * Added optional group supplement to --user option. Will now use default group of user if no group given
290 * Revision 1.77 2002/03/07 03:52:06 oes
291 * - Fixed compiler warnings etc
292 * - Improved handling of failed DNS lookups
294 * Revision 1.76 2002/03/06 22:54:35 jongfoster
295 * Automated function-comment nitpicking.
297 * Revision 1.75 2002/03/06 10:02:19 oes
298 * Fixed stupid bug when --user was not given
300 * Revision 1.74 2002/03/06 00:49:31 jongfoster
301 * Fixing warning on Windows
302 * Making #ifdefs that refer to the same variable consistently
303 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
305 * Revision 1.73 2002/03/05 23:57:30 hal9
306 * Stray character 's' on line 1618 was breaking build.
308 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
309 * - Re-enable OS/2 building after new parms were added
310 * - Fix false out of memory report when resolving CGI templates when no IP
311 * address is available of failed attempt (a la no such domain)
313 * Revision 1.71 2002/03/05 18:13:56 oes
314 * Added --user option
316 * Revision 1.70 2002/03/05 04:52:42 oes
317 * Deleted non-errlog debugging code
319 * Revision 1.69 2002/03/04 23:50:00 jongfoster
320 * Splitting off bind_port() call into bind_port_helper(), with
323 * Revision 1.68 2002/03/04 20:17:32 oes
326 * Revision 1.67 2002/03/04 18:18:57 oes
327 * - Removed _DEBUG mode
328 * - Cleand up cmdline parsing
329 * - Introduced --no-daemon, --pidfile options
330 * - Cleaned up signal handling:
331 * - Terminate cleanly on INT, TERM and ABRT
332 * - Schedule logfile for re-opening on HUP
333 * - Ignore CHLD and PIPE
334 * - Leave the rest with their default handlers
335 * - Uniform handler registration
336 * - Added usage() function
337 * - Played styleguide police
339 * Revision 1.66 2002/03/03 15:06:55 oes
340 * Re-enabled automatic config reloading
342 * Revision 1.65 2002/03/03 14:49:11 oes
343 * Fixed CLF logging: Now uses client's original HTTP request
345 * Revision 1.64 2002/03/03 09:18:03 joergs
346 * Made jumbjuster work on AmigaOS again.
348 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
349 * Clean up a little CRLF unpleasantness that suddenly appeared
351 * Revision 1.62 2002/02/20 23:17:23 jongfoster
352 * Detecting some out-of memory conditions and exiting with a log message.
354 * Revision 1.61 2002/01/17 21:01:52 jongfoster
355 * Moving all our URL and URL pattern parsing code to urlmatch.c.
357 * Revision 1.60 2001/12/30 14:07:32 steudten
358 * - Add signal handling (unix)
359 * - Add SIGHUP handler (unix)
360 * - Add creation of pidfile (unix)
361 * - Add action 'top' in rc file (RH)
362 * - Add entry 'SIGNALS' to manpage
363 * - Add exit message to logfile (unix)
365 * Revision 1.59 2001/12/13 14:07:18 oes
366 * Fixed Bug: 503 error page now sent OK
368 * Revision 1.58 2001/11/30 23:37:24 jongfoster
369 * Renaming the Win32 config file to config.txt - this is almost the
370 * same as the corresponding UNIX name "config"
372 * Revision 1.57 2001/11/16 00:47:43 jongfoster
373 * Changing the tty-disconnection code to use setsid().
375 * Revision 1.56 2001/11/13 20:20:54 jongfoster
376 * Tabs->spaces, fixing a bug with missing {} around an if()
378 * Revision 1.55 2001/11/13 20:14:53 jongfoster
379 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
381 * Revision 1.54 2001/11/07 00:03:14 steudten
382 * Give reliable return value if an error
383 * occurs not just 0 with new daemon mode.
385 * Revision 1.53 2001/11/05 21:41:43 steudten
386 * Add changes to be a real daemon just for unix os.
387 * (change cwd to /, detach from controlling tty, set
388 * process group and session leader to the own process.
390 * Add some fatal-error log message for failed malloc().
391 * Add '-d' if compiled with 'configure --with-debug' to
392 * enable debug output.
394 * Revision 1.52 2001/10/26 20:11:20 jongfoster
395 * Fixing type mismatch
397 * Revision 1.51 2001/10/26 17:38:28 oes
400 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
401 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
402 * threads to call select() simultaneously. So, it's time to do a real, live,
403 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
404 * (native). Both versions will work, but using __OS2__ offers multi-threading.
406 * Revision 1.49 2001/10/23 21:41:35 jongfoster
407 * Added call to initialize the (statically-allocated of course)
408 * "out of memory" CGI response.
410 * Revision 1.48 2001/10/10 19:56:46 jongfoster
411 * Moving some code that wasn't cookie-related out of an #ifdef
414 * Revision 1.47 2001/10/10 16:44:36 oes
415 * Added CONNECT destination port limitation check
417 * Revision 1.46 2001/10/08 15:17:41 oes
418 * Re-enabled SSL forwarding
420 * Revision 1.45 2001/10/07 15:42:11 oes
421 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
423 * Moved downgrading of the HTTP version from parse_http_request to
424 * chat(), since we can't decide if it is necessary before we have
425 * determined the actions for the URL. The HTTP command is now
426 * *always* re-built so the repairs need no longer be special-cased.
428 * filter_popups now gets a csp pointer so it can raise the new
429 * CSP_FLAG_MODIFIED flag.
433 * Added configurable size limit for the IOB. If the IOB grows so
434 * large that the next read would exceed the limit, the header
435 * is generated, and the header & unfiltered buffer are flushed
436 * to the client. Chat then continues in non-buffering,
437 * non-filtering body mode.
439 * Revision 1.44 2001/10/02 18:13:57 oes
442 * Revision 1.43 2001/10/02 15:32:13 oes
443 * Moved generation of hdr
445 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
446 * Cleaning up 2 compiler warnings on OS/2.
448 * Revision 1.41 2001/09/16 17:05:14 jongfoster
449 * Removing unused #include showarg.h
451 * Revision 1.40 2001/09/16 15:41:45 jongfoster
452 * Fixing signed/unsigned comparison warning.
454 * Revision 1.39 2001/09/16 13:21:27 jongfoster
455 * Changes to use new list functions.
457 * Revision 1.38 2001/09/16 13:01:46 jongfoster
458 * Removing redundant function call that zeroed zalloc()'d memory.
460 * Revision 1.37 2001/09/10 11:12:24 oes
461 * Deleted unused variable
463 * Revision 1.36 2001/09/10 10:56:15 oes
464 * Silenced compiler warnings
466 * Revision 1.35 2001/07/31 14:44:22 oes
467 * Deleted unused size parameter from filter_popups()
469 * Revision 1.34 2001/07/30 22:08:36 jongfoster
470 * Tidying up #defines:
471 * - All feature #defines are now of the form FEATURE_xxx
472 * - Permanently turned off WIN_GUI_EDIT
473 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
475 * Revision 1.33 2001/07/29 19:32:00 jongfoster
476 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
478 * Revision 1.32 2001/07/29 18:47:05 jongfoster
479 * Adding missing #include "loadcfg.h"
481 * Revision 1.31 2001/07/29 12:17:48 oes
482 * Applied pthread fix by Paul Lieverse
484 * Revision 1.30 2001/07/25 22:57:13 jongfoster
485 * __BEOS__ no longer overrides FEATURE_PTHREAD.
486 * This is because FEATURE_PTHREAD will soon be widely used, so I
487 * want to keep it simple.
489 * Revision 1.29 2001/07/24 12:47:06 oes
490 * Applied BeOS support update by Eugenia
492 * Revision 1.28 2001/07/23 13:26:12 oes
493 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
495 * Revision 1.27 2001/07/19 19:09:47 haroon
496 * - Added code to take care of the situation where while processing the first
497 * server response (which includes the server header), after finding the end
498 * of the headers we were not looking past the end of the headers for
499 * content modification. I enabled it for filter_popups.
500 * Someone else should look to see if other similar operations should be
501 * done to the discarded portion of the buffer.
503 * Note 2001/07/20: No, the other content modification mechanisms will process
504 * the whole iob later anyway. --oes
506 * Revision 1.26 2001/07/18 12:31:36 oes
509 * Revision 1.25 2001/07/15 19:43:49 jongfoster
510 * Supports POSIX threads.
511 * Also removed some unused #includes.
513 * Revision 1.24 2001/07/13 14:00:40 oes
514 * - Generic content modification scheme:
515 * Each feature has its own applicability flag that is set
516 * from csp->action->flags.
517 * Replaced the "filtering" int flag , by a function pointer
518 * "content_filter" to the function that will do the content
519 * modification. If it is != NULL, the document will be buffered
520 * and processed through *content_filter, which must set
521 * csp->content_length and return a modified copy of the body
522 * or return NULL (on failiure).
523 * - Changed csp->is_text to the more generic bitmap csp->content_type
524 * which can currently take the valued CT_TEXT or CT_GIF
526 * - Removed all #ifdef PCRS
528 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
529 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
530 * the `block_acl' call. This prevents a compilation error when the user
531 * does not wish to use the "ACL" feature.
533 * Revision 1.22 2001/06/29 21:45:41 oes
534 * Indentation, CRLF->LF, Tab-> Space
536 * Revision 1.21 2001/06/29 13:29:36 oes
537 * - Cleaned up, improved comments
538 * - Unified all possible interceptors (CGI,
539 * block, trust, fast_redirect) in one
540 * place, with one (CGI) answer generation
541 * mechansim. Much clearer now.
542 * - Removed the GIF image generation, which
543 * is now done in filters.c:block_url()
544 * - Made error conditions like domain lookup
545 * failiure or (various) problems while talking
546 * to the server use cgi.c:error_response()
547 * instead of generating HTML/HTTP in chat() (yuck!)
548 * - Removed logentry from cancelled commit
550 * Revision 1.20 2001/06/09 10:55:28 jongfoster
551 * Changing BUFSIZ ==> BUFFER_SIZE
553 * Revision 1.19 2001/06/07 23:12:52 jongfoster
554 * Replacing function pointer in struct gateway with a directly
555 * called function forwarded_connect().
556 * Replacing struct gateway with struct forward_spec
558 * Revision 1.18 2001/06/03 19:12:16 oes
559 * introduced new cgi handling
561 * Revision 1.17 2001/06/01 20:07:23 jongfoster
562 * Now uses action +image-blocker{} rather than config->tinygif
564 * Revision 1.16 2001/06/01 18:49:17 jongfoster
565 * Replaced "list_share" with "list" - the tiny memory gain was not
566 * worth the extra complexity.
568 * Revision 1.15 2001/05/31 21:24:47 jongfoster
569 * Changed "permission" to "action" throughout.
570 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
571 * Moved vanilla wafer check into chat(), since we must now
572 * decide whether or not to add it based on the URL.
574 * Revision 1.14 2001/05/29 20:14:01 joergs
575 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
578 * Revision 1.13 2001/05/29 09:50:24 jongfoster
579 * Unified blocklist/imagelist/permissionslist.
580 * File format is still under discussion, but the internal changes
583 * Also modified interceptor behaviour:
584 * - We now intercept all URLs beginning with one of the following
585 * prefixes (and *only* these prefixes):
587 * * http://ijbswa.sf.net/config/
588 * * http://ijbswa.sourceforge.net/config/
589 * - New interceptors "home page" - go to http://i.j.b/ to see it.
590 * - Internal changes so that intercepted and fast redirect pages
591 * are not replaced with an image.
592 * - Interceptors now have the option to send a binary page direct
593 * to the client. (i.e. ijb-send-banner uses this)
594 * - Implemented show-url-info interceptor. (Which is why I needed
595 * the above interceptors changes - a typical URL is
596 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
597 * The previous mechanism would not have intercepted that, and
598 * if it had been intercepted then it then it would have replaced
601 * Revision 1.12 2001/05/27 22:17:04 oes
603 * - re_process_buffer no longer writes the modified buffer
604 * to the client, which was very ugly. It now returns the
605 * buffer, which it is then written by chat.
607 * - content_length now adjusts the Content-Length: header
608 * for modified documents rather than crunch()ing it.
609 * (Length info in csp->content_length, which is 0 for
610 * unmodified documents)
612 * - For this to work, sed() is called twice when filtering.
614 * Revision 1.11 2001/05/26 17:27:53 jongfoster
615 * Added support for CLF and fixed LOG_LEVEL_LOG.
616 * Also did CRLF->LF fix of my previous patch.
618 * Revision 1.10 2001/05/26 15:26:15 jongfoster
619 * ACL feature now provides more security by immediately dropping
620 * connections from untrusted hosts.
622 * Revision 1.9 2001/05/26 00:28:36 jongfoster
623 * Automatic reloading of config file.
624 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
625 * Most of the global variables have been moved to a new
626 * struct configuration_spec, accessed through csp->config->globalname
627 * Most of the globals remaining are used by the Win32 GUI.
629 * Revision 1.8 2001/05/25 22:43:18 jongfoster
630 * Fixing minor memory leak and buffer overflow.
632 * Revision 1.7 2001/05/25 22:34:30 jongfoster
635 * Revision 1.6 2001/05/23 00:13:58 joergs
636 * AmigaOS support fixed.
638 * Revision 1.5 2001/05/22 18:46:04 oes
640 * - Enabled filtering banners by size rather than URL
641 * by adding patterns that replace all standard banner
642 * sizes with the "Junkbuster" gif to the re_filterfile
644 * - Enabled filtering WebBugs by providing a pattern
645 * which kills all 1x1 images
647 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
648 * which is selected by the (nonstandard and therefore
649 * capital) letter 'U' in the option string.
650 * It causes the quantifiers to be ungreedy by default.
651 * Appending a ? turns back to greedy (!).
653 * - Added a new interceptor ijb-send-banner, which
654 * sends back the "Junkbuster" gif. Without imagelist or
655 * MSIE detection support, or if tinygif = 1, or the
656 * URL isn't recognized as an imageurl, a lame HTML
657 * explanation is sent instead.
659 * - Added new feature, which permits blocking remote
660 * script redirects and firing back a local redirect
662 * The feature is conditionally compiled, i.e. it
663 * can be disabled with --disable-fast-redirects,
664 * plus it must be activated by a "fast-redirects"
665 * line in the config file, has its own log level
666 * and of course wants to be displayed by show-proxy-args
667 * Note: Boy, all the #ifdefs in 1001 locations and
668 * all the fumbling with configure.in and acconfig.h
669 * were *way* more work than the feature itself :-(
671 * - Because a generic redirect template was needed for
672 * this, tinygif = 3 now uses the same.
674 * - Moved GIFs, and other static HTTP response templates
679 * - Removed some >400 CRs again (Jon, you really worked
682 * Revision 1.4 2001/05/21 19:34:01 jongfoster
683 * Made failure to bind() a fatal error.
685 * Revision 1.3 2001/05/20 01:21:20 jongfoster
686 * Version 2.9.4 checkin.
687 * - Merged popupfile and cookiefile, and added control over PCRS
688 * filtering, in new "permissionsfile".
689 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
690 * file error you now get a message box (in the Win32 GUI) rather
691 * than the program exiting with no explanation.
692 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
694 * - Removed tabs from "config"
695 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
696 * - Bumped up version number.
698 * Revision 1.2 2001/05/17 22:34:44 oes
699 * - Added hint on GIF char array generation to jcc.c
700 * - Cleaned CRLF's from the sources and related files
701 * - Repaired logging for REF and FRC
703 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
704 * Initial import of version 2.9.3 source tree
707 *********************************************************************/
713 #include <sys/types.h>
721 # ifndef FEATURE_PTHREAD
725 # include <windows.h>
726 # include <process.h>
727 # endif /* ndef FEATURE_PTHREAD */
730 # ifndef _WIN_CONSOLE
732 # endif /* ndef _WIN_CONSOLE */
733 # include "w32svrapi.h"
735 #else /* ifndef _WIN32 */
737 # if !defined (__OS2__)
739 # include <sys/wait.h>
740 # endif /* ndef __OS2__ */
741 # include <sys/time.h>
742 # include <sys/stat.h>
743 # include <sys/ioctl.h>
746 #include <sys/termios.h>
757 # include <socket.h> /* BeOS has select() for sockets only. */
758 # include <OS.h> /* declarations for threads and stuff. */
761 # if defined(__EMX__) || defined(__OS2__)
762 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
767 #define bzero(B,N) memset(B,0x00,n)
782 #include "killpopup.h"
783 #include "miscutil.h"
785 #include "jbsockets.h"
790 #include "urlmatch.h"
792 const char jcc_h_rcs[] = JCC_H_VERSION;
793 const char project_h_rcs[] = PROJECT_H_VERSION;
796 struct client_state clients[1];
797 struct file_list files[1];
799 #ifdef FEATURE_STATISTICS
800 int urls_read = 0; /* total nr of urls read inc rejected */
801 int urls_rejected = 0; /* total nr of urls rejected */
802 #endif /* def FEATURE_STATISTICS */
804 #ifdef FEATURE_GRACEFUL_TERMINATION
808 static void listen_loop(void);
809 static void chat(struct client_state *csp);
811 void serve(struct client_state *csp);
812 #else /* ifndef AMIGA */
813 static void serve(struct client_state *csp);
814 #endif /* def AMIGA */
817 static int32 server_thread(void *data);
818 #endif /* def __BEOS__ */
821 #define sleep(N) Sleep(((N) * 1000))
825 #define sleep(N) DosSleep(((N) * 100))
828 #ifdef FEATURE_PTHREAD
829 pthread_mutex_t log_mutex;
830 pthread_mutex_t log_init_mutex;
832 #ifndef HAVE_GMTIME_R
833 pthread_mutex_t gmtime_mutex;
834 #endif /* ndef HAVE_GMTIME_R */
836 #ifndef HAVE_LOCALTIME_R
837 pthread_mutex_t localtime_mutex;
838 #endif /* ndef HAVE_GMTIME_R */
840 #ifndef HAVE_GETHOSTBYADDR_R
841 pthread_mutex_t gethostbyaddr_mutex;
842 #endif /* ndef HAVE_GETHOSTBYADDR_R */
844 #ifndef HAVE_GETHOSTBYNAME_R
845 pthread_mutex_t gethostbyname_mutex;
846 #endif /* ndef HAVE_GETHOSTBYNAME_R */
847 #endif /* FEATURE_PTHREAD */
849 #if defined(unix) || defined(__EMX__)
850 const char *basedir = NULL;
851 const char *pidfile = NULL;
852 int received_hup_signal = 0;
853 #endif /* defined unix */
855 /* The vanilla wafer. */
856 static const char VANILLA_WAFER[] =
857 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
858 "Do_not_send_me_any_copyrighted_information_other_than_the_"
859 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
860 "In_particular_do_not_send_me_any_cookies_that_"
861 "are_subject_to_a_claim_of_copyright_by_anybody._"
862 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
863 "(copyright_or_otherwise)_applying_to_any_cookie._";
865 /* HTTP snipplets. */
866 const char CSUCCEED[] =
867 "HTTP/1.0 200 Connection established\n"
868 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
870 const char CHEADER[] =
871 "HTTP/1.0 400 Invalid header received from browser\r\n"
872 "Connection: close\r\n\r\n"
873 "Invalid header received from browser.";
875 const char CFORBIDDEN[] =
876 "HTTP/1.0 403 Connection not allowable\r\n"
877 "X-Hint: If you read this message interactively, then you know why this happens ,-)\r\n"
878 "Connection: close\r\n\r\n";
880 const char FTP_RESPONSE[] =
881 "HTTP/1.0 400 Invalid request received from browser\r\n"
882 "Connection: close\r\n\r\n"
883 "Invalid request. Privoxy doesn't support FTP.\r\n";
885 const char GOPHER_RESPONSE[] =
886 "HTTP/1.0 400 Invalid request received from browser\r\n"
887 "Connection: close\r\n\r\n"
888 "Invalid request. Privoxy doesn't support gopher.\r\n";
890 const char MISSING_DESTINATION_RESPONSE[] =
891 "HTTP/1.0 400 Bad request received from browser\r\n"
892 "Connection: close\r\n\r\n"
893 "Bad request. Privoxy was unable to extract the destination.\r\n";
896 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
897 /*********************************************************************
899 * Function : sig_handler
901 * Description : Signal handler for different signals.
902 * Exit gracefully on ABRT, TERM and INT
903 * or set a flag that will cause the errlog
904 * to be reopened by the main thread on HUP.
907 * 1 : the_signal = the signal cause this function to call
911 *********************************************************************/
912 static void sig_handler(int the_signal)
918 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
929 received_hup_signal = 1;
934 * We shouldn't be here, unless we catch signals
935 * in main() that we can't handle here!
937 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
945 /*********************************************************************
949 * Description : Once a connection to the client has been accepted,
950 * this function is called (via serve()) to handle the
951 * main business of the communication. When this
952 * function returns, the caller must close the client
956 * 1 : csp = Current client state (buffers, headers, etc...)
958 * Returns : On success, the number of bytes written are returned (zero
959 * indicates nothing was written). On error, -1 is returned,
960 * and errno is set appropriately. If count is zero and the
961 * file descriptor refers to a regular file, 0 will be
962 * returned without causing any other effect. For a special
963 * file, the results are not portable.
965 *********************************************************************/
966 static void chat(struct client_state *csp)
969 * This next lines are a little ugly, but they simplifies the if statements
970 * below. Basically if TOGGLE, then we want the if to test if the
971 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
972 * then we want the if to test for CSP_FLAG_FORCED , else we don't
974 #ifdef FEATURE_TOGGLE
975 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
976 #else /* ifndef FEATURE_TOGGLE */
977 # define IS_TOGGLED_ON_AND
978 #endif /* ndef FEATURE_TOGGLE */
979 #ifdef FEATURE_FORCE_LOAD
980 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
981 #else /* ifndef FEATURE_FORCE_LOAD */
982 # define IS_NOT_FORCED_AND
983 #endif /* def FEATURE_FORCE_LOAD */
985 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
987 char buf[BUFFER_SIZE];
995 int ms_iis5_hack = 0;
997 unsigned int forwarded_connect_retries = 0;
998 unsigned int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
999 const struct forward_spec * fwd;
1000 struct http_request *http;
1001 int len; /* for buffer sizes */
1002 #ifdef FEATURE_KILL_POPUPS
1003 int block_popups; /* bool, 1==will block popups */
1004 int block_popups_now = 0; /* bool, 1==currently blocking popups */
1005 #endif /* def FEATURE_KILL_POPUPS */
1007 int pcrs_filter; /* bool, 1==will filter through pcrs */
1008 int gif_deanimate; /* bool, 1==will deanimate gifs */
1009 int jpeg_inspect; /* bool, 1==will inspect jpegs */
1011 /* Function that does the content filtering for the current request */
1012 char *(*content_filter)() = NULL;
1014 /* Skeleton for HTTP response, if we should intercept the request */
1015 struct http_response *rsp;
1017 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1018 struct list header_list;
1019 struct list *headers = &header_list;
1024 * Read the client's request. Note that since we're not using select() we
1025 * could get blocked here if a client connected, then didn't say anything!
1030 len = read_socket(csp->cfd, buf, sizeof(buf));
1032 if (len <= 0) break; /* error! */
1035 * If there is no memory left for buffering the
1036 * request, there is nothing we can do but hang up
1038 if (add_to_iob(csp, buf, len))
1043 req = get_header(csp);
1047 break; /* no HTTP request! */
1052 continue; /* more to come! */
1056 * If it's a FTP or gopher request, we don't support it.
1058 * These checks are better than nothing, but they might
1059 * not work in all configurations and some clients might
1060 * have problems digesting the answer.
1062 * They should, however, never cause more problems than
1063 * Privoxy's old behaviour (returning the misleading HTML error message:
1064 * "Could not resolve http://(ftp|gopher)://example.org").
1066 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1068 if (!strncmpic(req, "GET ftp://", 10))
1070 strcpy(buf, FTP_RESPONSE);
1071 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as FTP proxy: %s",
1072 csp->ip_addr_str, req);
1076 strcpy(buf, GOPHER_RESPONSE);
1077 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as gopher proxy: %s",
1078 csp->ip_addr_str, req);
1080 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1082 write_socket(csp->cfd, buf, strlen(buf));
1083 free_http_request(http);
1087 #ifdef FEATURE_FORCE_LOAD
1088 /* If this request contains the FORCE_PREFIX,
1089 * better get rid of it now and set the force flag --oes
1092 if (strstr(req, FORCE_PREFIX))
1094 strclean(req, FORCE_PREFIX);
1095 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
1096 csp->flags |= CSP_FLAG_FORCED;
1099 #endif /* def FEATURE_FORCE_LOAD */
1101 switch( parse_http_request(req, http, csp) )
1104 log_error(LOG_LEVEL_ERROR, "Out of memory while parsing request.");
1107 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", req);
1115 if (http->cmd == NULL)
1117 strcpy(buf, CHEADER);
1118 write_socket(csp->cfd, buf, strlen(buf));
1120 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
1122 free_http_request(http);
1126 /* grab the rest of the client's headers */
1130 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1132 len = read_socket(csp->cfd, buf, sizeof(buf));
1135 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1140 * If there is no memory left for buffering the
1141 * request, there is nothing we can do but hang up
1143 if (add_to_iob(csp, buf, len))
1150 if (p == NULL) break;
1157 if (http->host == NULL)
1160 * Intercepted or invalid request without domain
1161 * inside the request line. Try to get it another way.
1163 if (JB_ERR_OK == get_destination_from_headers(headers, http))
1165 /* Split the domain we just got for pattern matching */
1166 init_domain_components(http);
1170 /* We can't work without destination. Go spread the news.*/
1172 req = list_to_text(headers);
1174 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, http->cmd);
1175 log_error(LOG_LEVEL_ERROR,
1176 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1177 csp->ip_addr_str, http->cmd, req);
1180 strcpy(buf, MISSING_DESTINATION_RESPONSE);
1181 write_socket(csp->cfd, buf, strlen(buf));
1182 free_http_request(http);
1183 destroy_list(headers);
1187 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1188 * to get the destination IP address, use it as host directly
1189 * or do a reverse DNS lookup first.
1193 /* decide how to route the HTTP request */
1195 if ((fwd = forward_url(http, csp)) == NULL)
1197 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1198 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1201 /* build the http request to send to the server
1202 * we have to do one of the following:
1204 * create = use the original HTTP request to create a new
1205 * HTTP request that has either the path component
1206 * without the http://domainspec (w/path) or the
1207 * full orininal URL (w/url)
1208 * Note that the path and/or the HTTP version may
1209 * have been altered by now.
1211 * connect = Open a socket to the host:port of the server
1212 * and short-circuit server and client socket.
1214 * pass = Pass the request unchanged if forwarding a CONNECT
1215 * request to a parent proxy. Note that we'll be sending
1216 * the CFAIL message ourselves if connecting to the parent
1217 * fails, but we won't send a CSUCCEED message if it works,
1218 * since that would result in a double message (ours and the
1219 * parent's). After sending the request to the parent, we simply
1222 * here's the matrix:
1225 * +--------+--------+
1227 * 0 | create | connect|
1229 * Forwarding +--------+--------+
1231 * 1 | create | pass |
1233 * +--------+--------+
1238 * Determine the actions for this URL
1240 #ifdef FEATURE_TOGGLE
1241 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1243 /* Most compatible set of actions (i.e. none) */
1244 init_current_action(csp->action);
1247 #endif /* ndef FEATURE_TOGGLE */
1249 url_actions(http, csp);
1254 * Check if a CONNECT request is allowable:
1255 * In the absence of a +limit-connect action, allow only port 443.
1256 * If there is an action, allow whatever matches the specificaton.
1260 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
1261 || (csp->action->flags & ACTION_LIMIT_CONNECT
1262 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
1264 if (csp->action->flags & ACTION_TREAT_FORBIDDEN_CONNECTS_LIKE_BLOCKS)
1266 /* The response will violate the specs, but makes unblocking easier. */
1267 log_error(LOG_LEVEL_ERROR, "Marking suspicious CONNECT request from %s for blocking.",
1269 csp->action->flags |= ACTION_BLOCK;
1274 strcpy(buf, CFORBIDDEN);
1275 write_socket(csp->cfd, buf, strlen(buf));
1276 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
1277 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
1285 * Downgrade http version from 1.1 to 1.0 if +downgrade
1288 if ( (http->ssl == 0)
1289 && (!strcmpic(http->ver, "HTTP/1.1"))
1290 && (csp->action->flags & ACTION_DOWNGRADE))
1293 http->ver = strdup("HTTP/1.0");
1295 if (http->ver == NULL)
1297 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1302 * Save a copy of the original request for logging
1304 http->ocmd = strdup(http->cmd);
1306 if (http->ocmd == NULL)
1308 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
1312 * (Re)build the HTTP request for non-SSL requests.
1313 * If forwarding, use the whole URL, else, use only the path.
1319 http->cmd = strdup(http->gpc);
1320 string_append(&http->cmd, " ");
1322 if (fwd->forward_host)
1324 string_append(&http->cmd, http->url);
1328 string_append(&http->cmd, http->path);
1330 string_append(&http->cmd, " ");
1331 string_append(&http->cmd, http->ver);
1333 if (http->cmd == NULL)
1335 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1337 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", http->cmd);
1339 enlist(csp->headers, http->cmd);
1341 /* Append the previously read headers */
1342 list_append_list_unique(csp->headers, headers);
1343 destroy_list(headers);
1346 * If the user has not supplied any wafers, and the user has not
1347 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1349 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1350 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1352 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1356 #ifdef FEATURE_KILL_POPUPS
1357 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
1358 #endif /* def FEATURE_KILL_POPUPS */
1360 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
1361 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
1363 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
1365 jpeg_inspect = ((csp->action->flags & ACTION_JPEG_INSPECT) != 0);
1368 * We have a request. Now, check to see if we need to
1369 * intercept it, i.e. If ..
1373 /* We may not forward the request by rfc2616 sect 14.31 */
1374 (NULL != (rsp = direct_response(csp)))
1376 /* or we are enabled and... */
1377 || (IS_ENABLED_AND (
1379 /* ..the request was blocked */
1380 ( NULL != (rsp = block_url(csp)))
1382 /* ..or untrusted */
1383 #ifdef FEATURE_TRUST
1384 || ( NULL != (rsp = trust_url(csp)))
1385 #endif /* def FEATURE_TRUST */
1387 /* ..or a redirect kicked in */
1388 || ( NULL != (rsp = redirect_url(csp)))
1392 * .. or a CGI call was detected and answered.
1394 * This check comes last to give the user the power
1395 * to deny acces to some (or all) of the cgi pages.
1397 || (NULL != (rsp = dispatch_cgi(csp)))
1401 /* Write the answer to the client */
1402 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1403 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1405 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1408 #ifdef FEATURE_STATISTICS
1409 /* Count as a rejected request */
1410 csp->flags |= CSP_FLAG_REJECTED;
1411 #endif /* def FEATURE_STATISTICS */
1413 /* Log (FIXME: All intercept reasons appear as "crunch" with Status 200) */
1414 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
1415 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
1417 /* Clean up and return */
1418 free_http_response(rsp);
1422 hdr = sed(client_patterns, add_client_headers, csp);
1425 /* FIXME Should handle error properly */
1426 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1429 list_remove_all(csp->headers);
1431 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1433 if (fwd->forward_host)
1435 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1436 fwd->forward_host, fwd->forward_port, http->hostport);
1440 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1443 /* here we connect to the server, gateway, or the forwarder */
1445 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
1446 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
1448 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
1449 forwarded_connect_retries, http->hostport);
1452 if (csp->sfd == JB_INVALID_SOCKET)
1454 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1457 if (errno == EINVAL)
1459 rsp = error_response(csp, "no-such-domain", errno);
1461 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
1462 csp->ip_addr_str, http->ocmd);
1466 rsp = error_response(csp, "connect-failed", errno);
1468 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1469 csp->ip_addr_str, http->ocmd);
1473 /* Write the answer to the client */
1476 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1477 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1479 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1483 free_http_response(rsp);
1488 log_error(LOG_LEVEL_CONNECT, "OK");
1490 if (fwd->forward_host || (http->ssl == 0))
1492 /* write the client's (modified) header to the server
1493 * (along with anything else that may be in the buffer)
1496 if (write_socket(csp->sfd, hdr, strlen(hdr))
1497 || (flush_socket(csp->sfd, csp) < 0))
1499 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1502 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1503 csp->ip_addr_str, http->ocmd);
1505 rsp = error_response(csp, "connect-failed", errno);
1509 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1510 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1512 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1516 free_http_response(rsp);
1524 * We're running an SSL tunnel and we're not forwarding,
1525 * so just send the "connect succeeded" message to the
1526 * client, flush the rest, and get out of the way.
1528 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1529 csp->ip_addr_str, http->ocmd);
1531 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
1539 /* we're finished with the client's header */
1542 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1544 /* pass data between the client and server
1545 * until one or the other shuts down the connection.
1554 * FD_ZERO here seems to point to an errant macro which crashes.
1555 * So do this by hand for now...
1557 memset(&rfds,0x00,sizeof(fd_set));
1561 FD_SET(csp->cfd, &rfds);
1562 FD_SET(csp->sfd, &rfds);
1564 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
1568 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1572 /* this is the body of the browser's request
1573 * just read it and write it.
1576 if (FD_ISSET(csp->cfd, &rfds))
1578 len = read_socket(csp->cfd, buf, sizeof(buf));
1582 break; /* "game over, man" */
1585 if (write_socket(csp->sfd, buf, (size_t)len))
1587 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1594 * The server wants to talk. It could be the header or the body.
1595 * If `hdr' is null, then it's the header otherwise it's the body.
1596 * FIXME: Does `hdr' really mean `host'? No.
1600 if (FD_ISSET(csp->sfd, &rfds))
1603 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1607 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1609 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1610 csp->ip_addr_str, http->ocmd);
1612 rsp = error_response(csp, "connect-failed", errno);
1616 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1617 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1619 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1623 free_http_response(rsp);
1627 /* Add a trailing zero. This lets filter_popups
1628 * use string operations.
1632 #ifdef FEATURE_KILL_POPUPS
1633 /* Filter the popups on this read. */
1634 if (block_popups_now)
1636 filter_popups(buf, csp);
1638 #endif /* def FEATURE_KILL_POPUPS */
1640 /* Normally, this would indicate that we've read
1641 * as much as the server has sent us and we can
1642 * close the client connection. However, Microsoft
1643 * in its wisdom has released IIS/5 with a bug that
1644 * prevents it from sending the trailing \r\n in
1645 * a 302 redirect header (and possibly other headers).
1646 * To work around this if we've haven't parsed
1647 * a full header we'll append a trailing \r\n
1648 * and see if this now generates a valid one.
1650 * This hack shouldn't have any impacts. If we've
1651 * already transmitted the header or if this is a
1652 * SSL connection, then we won't bother with this
1653 * hack. So we only work on partially received
1654 * headers. If we append a \r\n and this still
1655 * doesn't generate a valid header, then we won't
1656 * transmit anything to the client.
1661 if (server_body || http->ssl)
1664 * If we have been buffering up the document,
1665 * now is the time to apply content modification
1666 * and send the result to the client.
1671 * If the content filter fails, use the original
1672 * buffer and length.
1673 * (see p != NULL ? p : csp->iob->cur below)
1675 if (NULL == (p = (*content_filter)(csp)))
1677 csp->content_length = csp->iob->eod - csp->iob->cur;
1680 hdr = sed(server_patterns_light, NULL, csp);
1684 /* FIXME Should handle error properly */
1685 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1688 if (write_socket(csp->cfd, hdr, strlen(hdr))
1689 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
1691 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1701 break; /* "game over, man" */
1705 * This is NOT the body, so
1706 * Let's pretend the server just sent us a blank line.
1708 len = sprintf(buf, "\r\n");
1711 * Now, let the normal header parsing algorithm below do its
1712 * job. If it fails, we'll exit instead of continuing.
1719 * If this is an SSL connection or we're in the body
1720 * of the server document, just write it to the client,
1721 * unless we need to buffer the body for later content-filtering
1724 if (server_body || http->ssl)
1729 * If there is no memory left for buffering the content, or the buffer limit
1730 * has been reached, switch to non-filtering mode, i.e. make & write the
1731 * header, flush the iob and buf, and get out of the way.
1733 if (add_to_iob(csp, buf, len))
1738 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
1740 hdr = sed(server_patterns, add_server_headers, csp);
1744 * Memory is too tight to even generate the header.
1745 * Send our static "Out-of-memory" page.
1747 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
1748 rsp = cgi_error_memory();
1750 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1751 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1753 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1758 hdrlen = strlen(hdr);
1760 if (write_socket(csp->cfd, hdr, hdrlen)
1761 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
1762 || (write_socket(csp->cfd, buf, (size_t) len)))
1764 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
1770 byte_count += hdrlen + flushed + len;
1772 content_filter = NULL;
1779 if (write_socket(csp->cfd, buf, (size_t)len))
1781 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
1790 /* we're still looking for the end of the
1791 * server's header ... (does that make header
1792 * parsing an "out of body experience" ?
1796 * buffer up the data we just read. If that fails,
1797 * there's little we can do but send our static
1798 * out-of-memory page.
1800 if (add_to_iob(csp, buf, len))
1802 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
1803 rsp = cgi_error_memory();
1805 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1806 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1808 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1813 /* get header lines from the iob */
1815 while ((p = get_header(csp)) != NULL)
1819 /* see following note */
1822 enlist(csp->headers, p);
1826 /* NOTE: there are no "empty" headers so
1827 * if the pointer `p' is not NULL we must
1828 * assume that we reached the end of the
1829 * buffer before we hit the end of the header.
1836 /* Well, we tried our MS IIS/5
1837 * hack and it didn't work.
1838 * The header is incomplete
1839 * and there isn't anything
1840 * we can do about it.
1846 /* Since we have to wait for
1847 * more from the server before
1848 * we can parse the headers
1849 * we just continue here.
1855 /* we have now received the entire header.
1856 * filter it and send the result to the client
1859 hdr = sed(server_patterns, add_server_headers, csp);
1862 /* FIXME Should handle error properly */
1863 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1866 #ifdef FEATURE_KILL_POPUPS
1867 /* Start blocking popups if appropriate. */
1869 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1870 !http->ssl && /* We talk plaintext */
1871 block_popups) /* Policy allows */
1873 block_popups_now = 1;
1875 * Filter the part of the body that came in the same read
1876 * as the last headers:
1878 filter_popups(csp->iob->cur, csp);
1881 #endif /* def FEATURE_KILL_POPUPS */
1883 /* Buffer and pcrs filter this if appropriate. */
1885 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1886 !http->ssl && /* We talk plaintext */
1887 pcrs_filter) /* Policy allows */
1889 content_filter = pcrs_filter_response;
1892 /* Buffer and gif_deanimate this if appropriate. */
1894 if ((csp->content_type & CT_GIF) && /* It's an image/gif MIME-Type */
1895 !http->ssl && /* We talk plaintext */
1896 gif_deanimate) /* Policy allows */
1898 content_filter = gif_deanimate_response;
1901 /* Buffer and jpg_inspect this if appropriate. */
1903 if ((csp->content_type & CT_JPEG) && /* It's an image/jpeg MIME-Type */
1904 !http->ssl && /* We talk plaintext */
1905 jpeg_inspect) /* Policy allows */
1907 content_filter = jpeg_inspect_response;
1911 * Only write if we're not buffering for content modification
1913 if (!content_filter)
1915 /* write the server's (modified) header to
1916 * the client (along with anything else that
1917 * may be in the buffer)
1920 if (write_socket(csp->cfd, hdr, strlen(hdr))
1921 || ((len = flush_socket(csp->cfd, csp)) < 0))
1923 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1925 /* the write failed, so don't bother
1926 * mentioning it to the client...
1927 * it probably can't hear us anyway.
1936 /* we're finished with the server's header */
1941 /* If this was a MS IIS/5 hack then it means
1942 * the server has already closed the
1943 * connection. Nothing more to read. Time
1954 return; /* huh? we should never get here */
1957 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
1958 csp->ip_addr_str, http->ocmd, byte_count);
1962 /*********************************************************************
1966 * Description : This is little more than chat. We only "serve" to
1967 * to close any socket that chat may have opened.
1970 * 1 : csp = Current client state (buffers, headers, etc...)
1974 *********************************************************************/
1976 void serve(struct client_state *csp)
1977 #else /* ifndef AMIGA */
1978 static void serve(struct client_state *csp)
1979 #endif /* def AMIGA */
1982 close_socket(csp->cfd);
1984 if (csp->sfd != JB_INVALID_SOCKET)
1986 close_socket(csp->sfd);
1989 csp->flags &= ~CSP_FLAG_ACTIVE;
1995 /*********************************************************************
1997 * Function : server_thread
1999 * Description : We only exist to call `serve' in a threaded environment.
2002 * 1 : data = Current client state (buffers, headers, etc...)
2004 * Returns : Always 0.
2006 *********************************************************************/
2007 static int32 server_thread(void *data)
2009 serve((struct client_state *) data);
2016 /*********************************************************************
2020 * Description : Print usage info & exit.
2022 * Parameters : Pointer to argv[0] for identifying ourselves
2026 *********************************************************************/
2027 void usage(const char *myname)
2029 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
2031 "Usage: %s [--help] [--version] [configfile]\n"
2033 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
2035 "Aborting.\n", myname);
2042 /*********************************************************************
2046 * Description : Load the config file and start the listen loop.
2047 * This function is a lot more *sane* with the `load_config'
2048 * and `listen_loop' functions; although it stills does
2049 * a *little* too much for my taste.
2052 * 1 : argc = Number of parameters (including $0).
2053 * 2 : argv = Array of (char *)'s to the parameters.
2055 * Returns : 1 if : can't open config file, unrecognized directive,
2056 * stats requested in multi-thread mode, can't open the
2057 * log file, can't open the jar file, listen port is invalid,
2058 * any load fails, and can't bind port.
2060 * Else main never returns, the process must be signaled
2061 * to terminate execution. Or, on Windows, use the
2062 * "File", "Exit" menu option.
2064 *********************************************************************/
2066 int real_main(int argc, const char *argv[])
2068 int main(int argc, const char *argv[])
2073 unsigned int random_seed;
2074 #endif /* ifdef HAVE_RANDOM */
2076 struct passwd *pw = NULL;
2077 struct group *grp = NULL;
2086 #if !defined(_WIN32)
2094 * Parse the command line arguments
2096 while (++argc_pos < argc)
2099 /* Check to see if the service must be installed or uninstalled */
2100 if (strncmp(argv[argc_pos], "--install", 9) == 0)
2102 const char *pName = argv[argc_pos] + 9;
2105 exit( (install_service(pName)) ? 0 : 1 );
2107 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
2109 const char *pName = argv[argc_pos] + 11;
2112 exit((uninstall_service(pName)) ? 0 : 1);
2114 else if (strcmp(argv[argc_pos], "--service" ) == 0)
2116 bRunAsService = TRUE;
2117 w32_set_service_cwd();
2118 atexit(w32_service_exit_notify);
2121 #endif /* defined(_WIN32) */
2124 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2126 if (strcmp(argv[argc_pos], "--help") == 0)
2131 else if(strcmp(argv[argc_pos], "--version") == 0)
2133 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
2139 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
2144 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
2146 if (++argc_pos == argc) usage(argv[0]);
2147 pidfile = strdup(argv[argc_pos]);
2150 else if (strcmp(argv[argc_pos], "--user" ) == 0)
2152 if (++argc_pos == argc) usage(argv[argc_pos]);
2154 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
2157 if (NULL == (grp = getgrnam(p)))
2159 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
2163 if (NULL == (pw = getpwnam(argv[argc_pos])))
2165 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
2168 if (p != NULL) *--p = '\0';
2171 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
2176 #endif /* defined(unix) */
2177 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
2179 configfile = argv[argc_pos];
2182 } /* -END- while (more arguments) */
2185 if ( *configfile != '/' )
2187 char *abs_file, cwd[1024];
2189 /* make config-filename absolute here */
2190 if ( !(getcwd(cwd, sizeof(cwd))))
2192 perror("get working dir failed");
2196 if (!(basedir = strdup(cwd))
2197 || (!(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))))
2199 perror("malloc failed");
2202 strcpy( abs_file, basedir );
2203 strcat( abs_file, "/" );
2204 strcat( abs_file, configfile );
2205 configfile = abs_file;
2207 #endif /* defined unix */
2211 clients->next = NULL;
2215 #elif defined(_WIN32)
2219 #ifdef FEATURE_PTHREAD
2221 * Prepare global mutex semaphores
2223 pthread_mutex_init(&log_mutex,0);
2224 pthread_mutex_init(&log_init_mutex,0);
2226 #ifndef HAVE_GMTIME_R
2227 pthread_mutex_init(&gmtime_mutex,0);
2228 #endif /* ndef HAVE_GMTIME_R */
2230 #ifndef HAVE_LOCALTIME_R
2231 pthread_mutex_init(&localtime_mutex,0);
2232 #endif /* ndef HAVE_GMTIME_R */
2234 #ifndef HAVE_GETHOSTBYADDR_R
2235 pthread_mutex_init(&gethostbyaddr_mutex,0);
2236 #endif /* ndef HAVE_GETHOSTBYADDR_R */
2238 #ifndef HAVE_GETHOSTBYNAME_R
2239 pthread_mutex_init(&gethostbyname_mutex,0);
2240 #endif /* ndef HAVE_GETHOSTBYNAME_R */
2241 #endif /* FEATURE_PTHREAD */
2244 random_seed = (unsigned int)time(NULL);
2245 srandom(random_seed);
2246 #endif /* ifdef HAVE_RANDOM */
2249 * Unix signal handling
2251 * Catch the abort, interrupt and terminate signals for a graceful exit
2252 * Catch the hangup signal so the errlog can be reopened.
2253 * Ignore the broken pipe signals (FIXME: Why?)
2255 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
2258 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
2259 const int ignored_signals[] = { SIGPIPE, 0 };
2261 for (idx = 0; catched_signals[idx] != 0; idx++)
2263 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
2264 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
2266 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
2267 #endif /* ifdef sun */
2269 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
2273 for (idx = 0; ignored_signals[idx] != 0; idx++)
2275 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
2277 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
2282 #else /* ifdef _WIN32 */
2283 # ifdef _WIN_CONSOLE
2285 * We *are* in a windows console app.
2286 * Print a verbose messages about FAQ's and such
2288 printf(win32_blurb);
2289 # endif /* def _WIN_CONSOLE */
2290 #endif /* def _WIN32 */
2293 /* Initialize the CGI subsystem */
2294 cgi_init_error_messages();
2297 * If runnig on unix and without the --nodaemon
2298 * option, become a daemon. I.e. fork, detach
2299 * from tty and get process group leadership
2312 if ( pid < 0 ) /* error */
2317 else if ( pid != 0 ) /* parent */
2322 * must check for errors
2323 * child died due to missing files aso
2326 wpid = waitpid( pid, &status, WNOHANG );
2335 /* Should be more portable, but not as well tested */
2340 #else /* ndef __FreeBSD__ */
2342 #endif /* ndef __FreeBSD__ */
2343 fd = open("/dev/tty", O_RDONLY);
2346 /* no error check here */
2347 ioctl( fd, TIOCNOTTY,0 );
2351 /* FIXME: should close stderr (fd 2) here too, but the test
2353 * and load config file is done in listen_loop() and puts
2354 * some messages on stderr there.
2361 } /* -END- if (!no_daemon) */
2364 * As soon as we have written the PID file, we can switch
2365 * to the user and group ID indicated by the --user option
2371 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
2373 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
2379 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
2381 if (chroot(pw->pw_dir) < 0)
2383 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
2387 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
2390 if (setuid(pw->pw_uid))
2392 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
2396 char putenv_dummy[64];
2398 strcpy(putenv_dummy, "HOME=/");
2399 if (putenv(putenv_dummy) != 0)
2401 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
2404 snprintf(putenv_dummy, 64, "USER=%s", pw->pw_name);
2405 if (putenv(putenv_dummy) != 0)
2407 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
2413 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
2416 #endif /* defined unix */
2419 /* This will be FALSE unless the command line specified --service
2423 /* Yup, so now we must attempt to establish a connection
2424 * with the service dispatcher. This will only work if this
2425 * process was launched by the service control manager to
2426 * actually run as a service. If this isn't the case, i've
2427 * known it take around 30 seconds or so for the call to return.
2430 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
2431 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
2433 /* Service has run, and at this point is now being stopped, so just return */
2438 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
2440 /* An error occurred. Usually it's because --service was wrongly specified
2441 * and we were unable to connect to the Service Control Dispatcher because
2442 * it wasn't expecting us and is therefore not listening.
2444 * For now, just continue below to call the listen_loop function.
2447 #endif /* def _WIN32 */
2457 /*********************************************************************
2459 * Function : bind_port_helper
2461 * Description : Bind the listen port. Handles logging, and aborts
2465 * 1 : config = Privoxy configuration. Specifies port
2468 * Returns : Port that was opened.
2470 *********************************************************************/
2471 static jb_socket bind_port_helper(struct configuration_spec * config)
2476 if ( (config->haddr != NULL)
2477 && (config->haddr[0] == '1')
2478 && (config->haddr[1] == '2')
2479 && (config->haddr[2] == '7')
2480 && (config->haddr[3] == '.') )
2482 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
2485 else if (config->haddr == NULL)
2487 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
2492 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
2493 config->hport, config->haddr);
2496 result = bind_port(config->haddr, config->hport, &bfd);
2503 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2504 "There may be another Privoxy or some other "
2505 "proxy running on port %d",
2506 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
2507 config->hport, config->hport);
2510 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2511 "The hostname is not resolvable",
2512 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2515 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
2516 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2519 /* shouldn't get here */
2520 return JB_INVALID_SOCKET;
2523 config->need_bind = 0;
2530 /* Without this simple workaround we get this compiler warning from _beginthread
2531 * warning C4028: formal parameter 1 different from declaration
2533 void w32_service_listen_loop(void *p)
2537 #endif /* def _WIN32 */
2540 /*********************************************************************
2542 * Function : listen_loop
2544 * Description : bind the listen port and enter a "FOREVER" listening loop.
2550 *********************************************************************/
2551 static void listen_loop(void)
2553 struct client_state *csp = NULL;
2555 struct configuration_spec * config;
2557 config = load_config();
2559 bfd = bind_port_helper(config);
2561 #ifdef FEATURE_GRACEFUL_TERMINATION
2562 while (!g_terminate)
2567 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
2568 while (waitpid(-1, NULL, WNOHANG) > 0)
2570 /* zombie children */
2572 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
2575 * Free data that was used by died threads
2581 * Re-open the errlog after HUP signal
2583 if (received_hup_signal)
2585 init_error_log(Argv[0], config->logfile, config->debug);
2586 received_hup_signal = 0;
2591 #ifdef FEATURE_COOKIE_JAR
2593 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
2594 * already open. I think unload_configfile() is not being run, which should do
2595 * this work. Until that can get resolved, we'll use this workaround.
2599 if (csp->config->jar)
2601 fclose(csp->config->jar);
2602 csp->config->jar = NULL;
2604 #endif /* FEATURE_COOKIE_JAR */
2605 #endif /* __OS2__ */
2607 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
2609 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
2613 csp->flags |= CSP_FLAG_ACTIVE;
2614 csp->sfd = JB_INVALID_SOCKET;
2616 csp->config = config = load_config();
2618 if ( config->need_bind )
2621 * Since we were listening to the "old port", we will not see
2622 * a "listen" param change until the next IJB request. So, at
2623 * least 1 more request must be made for us to find the new
2624 * setting. I am simply closing the old socket and binding the
2627 * Which-ever is correct, we will serve 1 more page via the
2628 * old settings. This should probably be a "show-proxy-args"
2629 * request. This should not be a so common of an operation
2630 * that this will hurt people's feelings.
2635 bfd = bind_port_helper(config);
2638 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
2640 if (!accept_connection(csp, bfd))
2642 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
2655 log_error(LOG_LEVEL_CONNECT, "OK");
2658 #ifdef FEATURE_TOGGLE
2659 if (global_toggle_state)
2661 csp->flags |= CSP_FLAG_TOGGLED_ON;
2663 #endif /* def FEATURE_TOGGLE */
2665 if (run_loader(csp))
2667 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
2668 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2672 if (block_acl(NULL,csp))
2674 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
2675 close_socket(csp->cfd);
2679 #endif /* def FEATURE_ACL */
2681 /* add it to the list of clients */
2682 csp->next = clients->next;
2683 clients->next = csp;
2685 if (config->multi_threaded)
2689 /* this is a switch () statment in the C preprocessor - ugh */
2690 #undef SELECTED_ONE_OPTION
2692 /* Use Pthreads in preference to native code */
2693 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
2694 #define SELECTED_ONE_OPTION
2696 pthread_t the_thread;
2697 pthread_attr_t attrs;
2699 pthread_attr_init(&attrs);
2700 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
2701 errno = pthread_create(&the_thread, &attrs,
2703 child_id = errno ? -1 : 0;
2704 pthread_attr_destroy(&attrs);
2708 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
2709 #define SELECTED_ONE_OPTION
2710 child_id = _beginthread(
2711 (void (*)(void *))serve,
2716 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
2717 #define SELECTED_ONE_OPTION
2718 child_id = _beginthread(
2719 (void(* _Optlink)(void*))serve,
2725 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
2726 #define SELECTED_ONE_OPTION
2728 thread_id tid = spawn_thread
2729 (server_thread, "server", B_NORMAL_PRIORITY, csp);
2731 if ((tid >= 0) && (resume_thread(tid) == B_OK))
2733 child_id = (int) tid;
2742 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2743 #define SELECTED_ONE_OPTION
2744 csp->cfd = ReleaseSocket(csp->cfd, -1);
2746 if((child_id = (int)CreateNewProcTags(
2747 NP_Entry, (ULONG)server_thread,
2748 NP_Output, Output(),
2749 NP_CloseOutput, FALSE,
2750 NP_Name, (ULONG)"privoxy child",
2751 NP_StackSize, 200*1024,
2755 ((struct Task *)child_id)->tc_UserData = csp;
2756 Signal((struct Task *)child_id, SIGF_SINGLE);
2761 #if !defined(SELECTED_ONE_OPTION)
2764 /* This block is only needed when using fork().
2765 * When using threads, the server thread was
2766 * created and run by the call to _beginthread().
2768 if (child_id == 0) /* child */
2771 #ifdef FEATURE_TOGGLE
2772 int inherited_toggle_state = global_toggle_state;
2773 #endif /* def FEATURE_TOGGLE */
2778 * If we've been toggled or we've blocked the request, tell Mom
2781 #ifdef FEATURE_TOGGLE
2782 if (inherited_toggle_state != global_toggle_state)
2784 rc |= RC_FLAG_TOGGLED;
2786 #endif /* def FEATURE_TOGGLE */
2788 #ifdef FEATURE_STATISTICS
2789 if (csp->flags & CSP_FLAG_REJECTED)
2791 rc |= RC_FLAG_BLOCKED;
2793 #endif /* ndef FEATURE_STATISTICS */
2797 else if (child_id > 0) /* parent */
2799 /* in a fork()'d environment, the parent's
2800 * copy of the client socket and the CSP
2804 #if !defined(_WIN32) && !defined(__CYGWIN__)
2806 wait( &child_status );
2809 * Evaluate child's return code: If the child has
2810 * - been toggled, toggle ourselves
2811 * - blocked its request, bump up the stats counter
2814 #ifdef FEATURE_TOGGLE
2815 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
2817 global_toggle_state = !global_toggle_state;
2819 #endif /* def FEATURE_TOGGLE */
2821 #ifdef FEATURE_STATISTICS
2823 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
2827 #endif /* def FEATURE_STATISTICS */
2829 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
2830 close_socket(csp->cfd);
2831 csp->flags &= ~CSP_FLAG_ACTIVE;
2835 #undef SELECTED_ONE_OPTION
2836 /* end of cpp switch () */
2838 if (child_id < 0) /* failed */
2840 char buf[BUFFER_SIZE];
2842 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
2844 sprintf(buf , "Privoxy: can't fork: errno = %d", errno);
2846 write_socket(csp->cfd, buf, strlen(buf));
2847 close_socket(csp->cfd);
2848 csp->flags &= ~CSP_FLAG_ACTIVE;
2859 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
2861 /* Clean up. Aim: free all memory (no leaks) */
2862 #ifdef FEATURE_GRACEFUL_TERMINATION
2864 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
2866 unload_current_config_file();
2867 unload_current_actions_file();
2868 unload_current_re_filterfile();
2869 #ifdef FEATURE_TRUST
2870 unload_current_trust_file();
2873 if (config->multi_threaded)
2880 } while ((clients->next != NULL) && (--i > 0));
2884 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
2895 #ifdef FEATURE_COOKIE_JAR
2896 if (NULL != config->jar)
2898 fclose(config->jar);
2902 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
2903 /* Cleanup - remove taskbar icon etc. */
2908 #endif /* FEATURE_GRACEFUL_TERMINATION */