1 const char jcc_rcs[] = "$Id: jcc.c,v 1.109 2006/12/06 19:41:40 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 1.109 2006/12/06 19:41:40 fabiankeil
37 * Privoxy is now able to run as intercepting
38 * proxy in combination with any packet filter
39 * that does the port redirection. The destination
40 * is extracted from the "Host:" header which
41 * should be available for nearly all requests.
43 * Moved HTTP snipplets into jcc.c.
44 * Added error message for gopher proxy requests.
46 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
47 * Only unlink the pidfile if it's actually used.
49 * Change order of interception checks to make
50 * it possible to block or redirect requests for
53 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
54 * Make pthread mutex locking more generic. Instead of
55 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
56 * and use mutex locking unless there is an _r function
57 * available. Better safe than sorry.
59 * Fixes "./configure --disable-pthread" and should result
60 * in less threading-related problems on pthread-using platforms,
61 * but it still doesn't fix BR#1122404.
63 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
64 * Move pthread.h inclusion from jcc.c to jcc.h.
65 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
67 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
68 * Don't exit after receiving the second SIGHUP on Solaris.
70 * Fixes BR 1052235, but the same problem may exist on other
71 * systems. Once 3.0.6 is out we should use sigset()
72 * where available and see if it breaks anything.
74 * Revision 1.104 2006/09/23 13:26:38 roro
75 * Replace TABs by spaces in source code.
77 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
78 * Fix +redirect{}. Didn't work with -fast-redirects.
80 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
81 * Respond with 400 and a short text message
82 * if the client tries to use Privoxy as FTP proxy.
84 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
85 * Make number of retries in case of forwarded-connect problems
86 * a config file option (forwarded-connect-retries) and use 0 as
89 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
92 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
93 * Follow the OpenBSD port's lead and protect the resolve
94 * functions on OpenBSD as well.
96 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
97 * --user fix. Only use the user as group if no group is specified.
98 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
100 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
101 * Windows service (re-)integration
105 * --install[:service_name]
106 * --uninstall[:service_name]
109 * They work as follows:
110 * --install will create a service for you and then terminate.
111 * By default the service name will be "privoxy" (without the quotes).
112 * However you can run multiple services if you wish, just by adding
113 * a colon and then a name (no spaces).
115 * --uninstall follows the exact same rules a --install.
117 * --service is used when the program is executed by the service
118 * control manager, and in normal circumstances would never be
119 * used as a command line argument.
121 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
122 * Windows service integration
124 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
125 * Incorporate Fabian Keil's patch work:
126 http://www.fabiankeil.de/sourcecode/privoxy/
128 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
129 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
130 * with what was really the latest development (the v_3_0_branch branch)
132 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
133 * Thanks to Jindrich Makovicka for a race condition fix for the log
134 * file. The race condition remains for non-pthread implementations.
135 * Reference patch #1175720.
137 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
138 * Add the ability to check jpeg images for invalid
139 * lengths of comment blocks. Defensive strategy
140 * against the exploit:
141 * Microsoft Security Bulletin MS04-028
142 * Buffer Overrun in JPEG Processing (GDI+) Could
143 * Allow Code Execution (833987)
144 * Enabled with +inspect-jpegs in actions files.
146 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
147 * - Fixed usage info for non-unix platforms
148 * - Fixed small cmdline parsing bug
150 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
151 * Diagnostics: Now preserve the returncode of pthread_create
152 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
154 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
155 * No longer ignore SIGCHLD. Fixes bug #769381
157 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
158 * Close jarfile on graceful exit, remove stray line
160 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
161 * Cosmetics: Killed a warning, a typo and an allocation left at exit
163 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
164 * No longer rely on non-POSIX.1 extensions of getcwd().
167 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
168 * Replaced setenv() by posix-compliant putenv()
169 * Thanks to Neil McCalden (nmcc AT users.sf.net).
171 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
172 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
174 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
175 * Clean-up and extension of improvements for forked mode:
176 * - Child's return code now consists of flags RC_FLAG_*
177 * - Reporting toggle to parent now properly #ifdef'ed
178 * - Children now report blocking to parent. This enables
179 * statistics in forked mode
181 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
182 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
183 * Children now report having been toggled through _exit(17), parents
184 * watch for that code and toggle themselves if found.
186 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
187 * Wrapping all *_r functions (the non-_r versions of them) with
188 * mutex semaphores for OSX. Hopefully this will take care of all
189 * of those pesky crash reports.
191 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
192 * Fixed two mostly harmless mem leaks
194 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
195 * Fix: Head of global clients list now initialized to NULL
197 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
198 * Added basic support for OPTIONS and TRACE HTTP methods:
199 * - New interceptor direct_response() added in chat().
200 * - sed() moved to earlier in the process, so that the
201 * Host: header is evaluated before actions and forwarding
204 * Revision 1.92 2002/05/08 16:00:46 oes
205 * Chat's buffer handling:
206 * - Fixed bug with unchecked out-of-mem conditions
207 * while reading client request & server headers
208 * - No longer predict if the buffer limit will be exceeded
209 * in the next read -- check add_to_iob's new
210 * return code. If buffer couldn't be extended
211 * (policy or out-of-mem) while
212 * - reading from client: abort
213 * - reading server headers: send error page
214 * - buffering server body for filter: flush,
215 * and if that fails: send error page
217 * Revision 1.91 2002/04/08 20:35:58 swa
220 * Revision 1.90 2002/04/02 14:57:28 oes
221 * Made sending wafers independent of FEATURE_COOKIE_JAR
223 * Revision 1.89 2002/03/31 17:18:59 jongfoster
224 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
226 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
227 * More compiler warning message maintenance
229 * Revision 1.87 2002/03/26 22:29:54 swa
230 * we have a new homepage!
232 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
233 * Workaround for closing the jarfile before load_config() comes around again
235 * Revision 1.85 2002/03/24 15:23:33 jongfoster
238 * Revision 1.84 2002/03/24 13:25:43 swa
239 * name change related issues
241 * Revision 1.83 2002/03/16 23:54:06 jongfoster
242 * Adding graceful termination feature, to help look for memory leaks.
243 * If you enable this (which, by design, has to be done by hand
244 * editing config.h) and then go to http://i.j.b/die, then the program
245 * will exit cleanly after the *next* request. It should free all the
246 * memory that was used.
248 * Revision 1.82 2002/03/13 00:27:05 jongfoster
251 * Revision 1.81 2002/03/12 01:42:50 oes
252 * Introduced modular filters
254 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
255 * OS/2 port maintenance:
256 * - Fixed EMX build - it had decayed a little
257 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
258 * substituted a memset for now.
260 * Revision 1.79 2002/03/09 20:03:52 jongfoster
261 * - Making various functions return int rather than size_t.
262 * (Undoing a recent change). Since size_t is unsigned on
263 * Windows, functions like read_socket that return -1 on
264 * error cannot return a size_t.
266 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
267 * crashes, and also frequently caused JB to jump to 100%
268 * CPU and stay there. (Because it thought it had just
269 * read ((unsigned)-1) == 4Gb of data...)
271 * - The signature of write_socket has changed, it now simply
272 * returns success=0/failure=nonzero.
274 * - Trying to get rid of a few warnings --with-debug on
275 * Windows, I've introduced a new type "jb_socket". This is
276 * used for the socket file descriptors. On Windows, this
277 * is SOCKET (a typedef for unsigned). Everywhere else, it's
278 * an int. The error value can't be -1 any more, so it's
279 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
280 * Windows it maps to the #define INVALID_SOCKET.)
282 * - The signature of bind_port has changed.
284 * Revision 1.78 2002/03/08 21:35:04 oes
285 * Added optional group supplement to --user option. Will now use default group of user if no group given
287 * Revision 1.77 2002/03/07 03:52:06 oes
288 * - Fixed compiler warnings etc
289 * - Improved handling of failed DNS lookups
291 * Revision 1.76 2002/03/06 22:54:35 jongfoster
292 * Automated function-comment nitpicking.
294 * Revision 1.75 2002/03/06 10:02:19 oes
295 * Fixed stupid bug when --user was not given
297 * Revision 1.74 2002/03/06 00:49:31 jongfoster
298 * Fixing warning on Windows
299 * Making #ifdefs that refer to the same variable consistently
300 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
302 * Revision 1.73 2002/03/05 23:57:30 hal9
303 * Stray character 's' on line 1618 was breaking build.
305 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
306 * - Re-enable OS/2 building after new parms were added
307 * - Fix false out of memory report when resolving CGI templates when no IP
308 * address is available of failed attempt (a la no such domain)
310 * Revision 1.71 2002/03/05 18:13:56 oes
311 * Added --user option
313 * Revision 1.70 2002/03/05 04:52:42 oes
314 * Deleted non-errlog debugging code
316 * Revision 1.69 2002/03/04 23:50:00 jongfoster
317 * Splitting off bind_port() call into bind_port_helper(), with
320 * Revision 1.68 2002/03/04 20:17:32 oes
323 * Revision 1.67 2002/03/04 18:18:57 oes
324 * - Removed _DEBUG mode
325 * - Cleand up cmdline parsing
326 * - Introduced --no-daemon, --pidfile options
327 * - Cleaned up signal handling:
328 * - Terminate cleanly on INT, TERM and ABRT
329 * - Schedule logfile for re-opening on HUP
330 * - Ignore CHLD and PIPE
331 * - Leave the rest with their default handlers
332 * - Uniform handler registration
333 * - Added usage() function
334 * - Played styleguide police
336 * Revision 1.66 2002/03/03 15:06:55 oes
337 * Re-enabled automatic config reloading
339 * Revision 1.65 2002/03/03 14:49:11 oes
340 * Fixed CLF logging: Now uses client's original HTTP request
342 * Revision 1.64 2002/03/03 09:18:03 joergs
343 * Made jumbjuster work on AmigaOS again.
345 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
346 * Clean up a little CRLF unpleasantness that suddenly appeared
348 * Revision 1.62 2002/02/20 23:17:23 jongfoster
349 * Detecting some out-of memory conditions and exiting with a log message.
351 * Revision 1.61 2002/01/17 21:01:52 jongfoster
352 * Moving all our URL and URL pattern parsing code to urlmatch.c.
354 * Revision 1.60 2001/12/30 14:07:32 steudten
355 * - Add signal handling (unix)
356 * - Add SIGHUP handler (unix)
357 * - Add creation of pidfile (unix)
358 * - Add action 'top' in rc file (RH)
359 * - Add entry 'SIGNALS' to manpage
360 * - Add exit message to logfile (unix)
362 * Revision 1.59 2001/12/13 14:07:18 oes
363 * Fixed Bug: 503 error page now sent OK
365 * Revision 1.58 2001/11/30 23:37:24 jongfoster
366 * Renaming the Win32 config file to config.txt - this is almost the
367 * same as the corresponding UNIX name "config"
369 * Revision 1.57 2001/11/16 00:47:43 jongfoster
370 * Changing the tty-disconnection code to use setsid().
372 * Revision 1.56 2001/11/13 20:20:54 jongfoster
373 * Tabs->spaces, fixing a bug with missing {} around an if()
375 * Revision 1.55 2001/11/13 20:14:53 jongfoster
376 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
378 * Revision 1.54 2001/11/07 00:03:14 steudten
379 * Give reliable return value if an error
380 * occurs not just 0 with new daemon mode.
382 * Revision 1.53 2001/11/05 21:41:43 steudten
383 * Add changes to be a real daemon just for unix os.
384 * (change cwd to /, detach from controlling tty, set
385 * process group and session leader to the own process.
387 * Add some fatal-error log message for failed malloc().
388 * Add '-d' if compiled with 'configure --with-debug' to
389 * enable debug output.
391 * Revision 1.52 2001/10/26 20:11:20 jongfoster
392 * Fixing type mismatch
394 * Revision 1.51 2001/10/26 17:38:28 oes
397 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
398 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
399 * threads to call select() simultaneously. So, it's time to do a real, live,
400 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
401 * (native). Both versions will work, but using __OS2__ offers multi-threading.
403 * Revision 1.49 2001/10/23 21:41:35 jongfoster
404 * Added call to initialize the (statically-allocated of course)
405 * "out of memory" CGI response.
407 * Revision 1.48 2001/10/10 19:56:46 jongfoster
408 * Moving some code that wasn't cookie-related out of an #ifdef
411 * Revision 1.47 2001/10/10 16:44:36 oes
412 * Added CONNECT destination port limitation check
414 * Revision 1.46 2001/10/08 15:17:41 oes
415 * Re-enabled SSL forwarding
417 * Revision 1.45 2001/10/07 15:42:11 oes
418 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
420 * Moved downgrading of the HTTP version from parse_http_request to
421 * chat(), since we can't decide if it is necessary before we have
422 * determined the actions for the URL. The HTTP command is now
423 * *always* re-built so the repairs need no longer be special-cased.
425 * filter_popups now gets a csp pointer so it can raise the new
426 * CSP_FLAG_MODIFIED flag.
430 * Added configurable size limit for the IOB. If the IOB grows so
431 * large that the next read would exceed the limit, the header
432 * is generated, and the header & unfiltered buffer are flushed
433 * to the client. Chat then continues in non-buffering,
434 * non-filtering body mode.
436 * Revision 1.44 2001/10/02 18:13:57 oes
439 * Revision 1.43 2001/10/02 15:32:13 oes
440 * Moved generation of hdr
442 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
443 * Cleaning up 2 compiler warnings on OS/2.
445 * Revision 1.41 2001/09/16 17:05:14 jongfoster
446 * Removing unused #include showarg.h
448 * Revision 1.40 2001/09/16 15:41:45 jongfoster
449 * Fixing signed/unsigned comparison warning.
451 * Revision 1.39 2001/09/16 13:21:27 jongfoster
452 * Changes to use new list functions.
454 * Revision 1.38 2001/09/16 13:01:46 jongfoster
455 * Removing redundant function call that zeroed zalloc()'d memory.
457 * Revision 1.37 2001/09/10 11:12:24 oes
458 * Deleted unused variable
460 * Revision 1.36 2001/09/10 10:56:15 oes
461 * Silenced compiler warnings
463 * Revision 1.35 2001/07/31 14:44:22 oes
464 * Deleted unused size parameter from filter_popups()
466 * Revision 1.34 2001/07/30 22:08:36 jongfoster
467 * Tidying up #defines:
468 * - All feature #defines are now of the form FEATURE_xxx
469 * - Permanently turned off WIN_GUI_EDIT
470 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
472 * Revision 1.33 2001/07/29 19:32:00 jongfoster
473 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
475 * Revision 1.32 2001/07/29 18:47:05 jongfoster
476 * Adding missing #include "loadcfg.h"
478 * Revision 1.31 2001/07/29 12:17:48 oes
479 * Applied pthread fix by Paul Lieverse
481 * Revision 1.30 2001/07/25 22:57:13 jongfoster
482 * __BEOS__ no longer overrides FEATURE_PTHREAD.
483 * This is because FEATURE_PTHREAD will soon be widely used, so I
484 * want to keep it simple.
486 * Revision 1.29 2001/07/24 12:47:06 oes
487 * Applied BeOS support update by Eugenia
489 * Revision 1.28 2001/07/23 13:26:12 oes
490 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
492 * Revision 1.27 2001/07/19 19:09:47 haroon
493 * - Added code to take care of the situation where while processing the first
494 * server response (which includes the server header), after finding the end
495 * of the headers we were not looking past the end of the headers for
496 * content modification. I enabled it for filter_popups.
497 * Someone else should look to see if other similar operations should be
498 * done to the discarded portion of the buffer.
500 * Note 2001/07/20: No, the other content modification mechanisms will process
501 * the whole iob later anyway. --oes
503 * Revision 1.26 2001/07/18 12:31:36 oes
506 * Revision 1.25 2001/07/15 19:43:49 jongfoster
507 * Supports POSIX threads.
508 * Also removed some unused #includes.
510 * Revision 1.24 2001/07/13 14:00:40 oes
511 * - Generic content modification scheme:
512 * Each feature has its own applicability flag that is set
513 * from csp->action->flags.
514 * Replaced the "filtering" int flag , by a function pointer
515 * "content_filter" to the function that will do the content
516 * modification. If it is != NULL, the document will be buffered
517 * and processed through *content_filter, which must set
518 * csp->content_length and return a modified copy of the body
519 * or return NULL (on failiure).
520 * - Changed csp->is_text to the more generic bitmap csp->content_type
521 * which can currently take the valued CT_TEXT or CT_GIF
523 * - Removed all #ifdef PCRS
525 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
526 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
527 * the `block_acl' call. This prevents a compilation error when the user
528 * does not wish to use the "ACL" feature.
530 * Revision 1.22 2001/06/29 21:45:41 oes
531 * Indentation, CRLF->LF, Tab-> Space
533 * Revision 1.21 2001/06/29 13:29:36 oes
534 * - Cleaned up, improved comments
535 * - Unified all possible interceptors (CGI,
536 * block, trust, fast_redirect) in one
537 * place, with one (CGI) answer generation
538 * mechansim. Much clearer now.
539 * - Removed the GIF image generation, which
540 * is now done in filters.c:block_url()
541 * - Made error conditions like domain lookup
542 * failiure or (various) problems while talking
543 * to the server use cgi.c:error_response()
544 * instead of generating HTML/HTTP in chat() (yuck!)
545 * - Removed logentry from cancelled commit
547 * Revision 1.20 2001/06/09 10:55:28 jongfoster
548 * Changing BUFSIZ ==> BUFFER_SIZE
550 * Revision 1.19 2001/06/07 23:12:52 jongfoster
551 * Replacing function pointer in struct gateway with a directly
552 * called function forwarded_connect().
553 * Replacing struct gateway with struct forward_spec
555 * Revision 1.18 2001/06/03 19:12:16 oes
556 * introduced new cgi handling
558 * Revision 1.17 2001/06/01 20:07:23 jongfoster
559 * Now uses action +image-blocker{} rather than config->tinygif
561 * Revision 1.16 2001/06/01 18:49:17 jongfoster
562 * Replaced "list_share" with "list" - the tiny memory gain was not
563 * worth the extra complexity.
565 * Revision 1.15 2001/05/31 21:24:47 jongfoster
566 * Changed "permission" to "action" throughout.
567 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
568 * Moved vanilla wafer check into chat(), since we must now
569 * decide whether or not to add it based on the URL.
571 * Revision 1.14 2001/05/29 20:14:01 joergs
572 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
575 * Revision 1.13 2001/05/29 09:50:24 jongfoster
576 * Unified blocklist/imagelist/permissionslist.
577 * File format is still under discussion, but the internal changes
580 * Also modified interceptor behaviour:
581 * - We now intercept all URLs beginning with one of the following
582 * prefixes (and *only* these prefixes):
584 * * http://ijbswa.sf.net/config/
585 * * http://ijbswa.sourceforge.net/config/
586 * - New interceptors "home page" - go to http://i.j.b/ to see it.
587 * - Internal changes so that intercepted and fast redirect pages
588 * are not replaced with an image.
589 * - Interceptors now have the option to send a binary page direct
590 * to the client. (i.e. ijb-send-banner uses this)
591 * - Implemented show-url-info interceptor. (Which is why I needed
592 * the above interceptors changes - a typical URL is
593 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
594 * The previous mechanism would not have intercepted that, and
595 * if it had been intercepted then it then it would have replaced
598 * Revision 1.12 2001/05/27 22:17:04 oes
600 * - re_process_buffer no longer writes the modified buffer
601 * to the client, which was very ugly. It now returns the
602 * buffer, which it is then written by chat.
604 * - content_length now adjusts the Content-Length: header
605 * for modified documents rather than crunch()ing it.
606 * (Length info in csp->content_length, which is 0 for
607 * unmodified documents)
609 * - For this to work, sed() is called twice when filtering.
611 * Revision 1.11 2001/05/26 17:27:53 jongfoster
612 * Added support for CLF and fixed LOG_LEVEL_LOG.
613 * Also did CRLF->LF fix of my previous patch.
615 * Revision 1.10 2001/05/26 15:26:15 jongfoster
616 * ACL feature now provides more security by immediately dropping
617 * connections from untrusted hosts.
619 * Revision 1.9 2001/05/26 00:28:36 jongfoster
620 * Automatic reloading of config file.
621 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
622 * Most of the global variables have been moved to a new
623 * struct configuration_spec, accessed through csp->config->globalname
624 * Most of the globals remaining are used by the Win32 GUI.
626 * Revision 1.8 2001/05/25 22:43:18 jongfoster
627 * Fixing minor memory leak and buffer overflow.
629 * Revision 1.7 2001/05/25 22:34:30 jongfoster
632 * Revision 1.6 2001/05/23 00:13:58 joergs
633 * AmigaOS support fixed.
635 * Revision 1.5 2001/05/22 18:46:04 oes
637 * - Enabled filtering banners by size rather than URL
638 * by adding patterns that replace all standard banner
639 * sizes with the "Junkbuster" gif to the re_filterfile
641 * - Enabled filtering WebBugs by providing a pattern
642 * which kills all 1x1 images
644 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
645 * which is selected by the (nonstandard and therefore
646 * capital) letter 'U' in the option string.
647 * It causes the quantifiers to be ungreedy by default.
648 * Appending a ? turns back to greedy (!).
650 * - Added a new interceptor ijb-send-banner, which
651 * sends back the "Junkbuster" gif. Without imagelist or
652 * MSIE detection support, or if tinygif = 1, or the
653 * URL isn't recognized as an imageurl, a lame HTML
654 * explanation is sent instead.
656 * - Added new feature, which permits blocking remote
657 * script redirects and firing back a local redirect
659 * The feature is conditionally compiled, i.e. it
660 * can be disabled with --disable-fast-redirects,
661 * plus it must be activated by a "fast-redirects"
662 * line in the config file, has its own log level
663 * and of course wants to be displayed by show-proxy-args
664 * Note: Boy, all the #ifdefs in 1001 locations and
665 * all the fumbling with configure.in and acconfig.h
666 * were *way* more work than the feature itself :-(
668 * - Because a generic redirect template was needed for
669 * this, tinygif = 3 now uses the same.
671 * - Moved GIFs, and other static HTTP response templates
676 * - Removed some >400 CRs again (Jon, you really worked
679 * Revision 1.4 2001/05/21 19:34:01 jongfoster
680 * Made failure to bind() a fatal error.
682 * Revision 1.3 2001/05/20 01:21:20 jongfoster
683 * Version 2.9.4 checkin.
684 * - Merged popupfile and cookiefile, and added control over PCRS
685 * filtering, in new "permissionsfile".
686 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
687 * file error you now get a message box (in the Win32 GUI) rather
688 * than the program exiting with no explanation.
689 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
691 * - Removed tabs from "config"
692 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
693 * - Bumped up version number.
695 * Revision 1.2 2001/05/17 22:34:44 oes
696 * - Added hint on GIF char array generation to jcc.c
697 * - Cleaned CRLF's from the sources and related files
698 * - Repaired logging for REF and FRC
700 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
701 * Initial import of version 2.9.3 source tree
704 *********************************************************************/
710 #include <sys/types.h>
718 # ifndef FEATURE_PTHREAD
722 # include <windows.h>
723 # include <process.h>
724 # endif /* ndef FEATURE_PTHREAD */
727 # ifndef _WIN_CONSOLE
729 # endif /* ndef _WIN_CONSOLE */
730 # include "w32svrapi.h"
732 #else /* ifndef _WIN32 */
734 # if !defined (__OS2__)
736 # include <sys/wait.h>
737 # endif /* ndef __OS2__ */
738 # include <sys/time.h>
739 # include <sys/stat.h>
740 # include <sys/ioctl.h>
743 #include <sys/termios.h>
754 # include <socket.h> /* BeOS has select() for sockets only. */
755 # include <OS.h> /* declarations for threads and stuff. */
758 # if defined(__EMX__) || defined(__OS2__)
759 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
764 #define bzero(B,N) memset(B,0x00,n)
779 #include "killpopup.h"
780 #include "miscutil.h"
782 #include "jbsockets.h"
787 #include "urlmatch.h"
789 const char jcc_h_rcs[] = JCC_H_VERSION;
790 const char project_h_rcs[] = PROJECT_H_VERSION;
793 struct client_state clients[1];
794 struct file_list files[1];
796 #ifdef FEATURE_STATISTICS
797 int urls_read = 0; /* total nr of urls read inc rejected */
798 int urls_rejected = 0; /* total nr of urls rejected */
799 #endif /* def FEATURE_STATISTICS */
801 #ifdef FEATURE_GRACEFUL_TERMINATION
805 static void listen_loop(void);
806 static void chat(struct client_state *csp);
808 void serve(struct client_state *csp);
809 #else /* ifndef AMIGA */
810 static void serve(struct client_state *csp);
811 #endif /* def AMIGA */
814 static int32 server_thread(void *data);
815 #endif /* def __BEOS__ */
818 #define sleep(N) Sleep(((N) * 1000))
822 #define sleep(N) DosSleep(((N) * 100))
825 #ifdef FEATURE_PTHREAD
826 pthread_mutex_t log_mutex;
827 pthread_mutex_t log_init_mutex;
829 #ifndef HAVE_GMTIME_R
830 pthread_mutex_t gmtime_mutex;
831 #endif /* ndef HAVE_GMTIME_R */
833 #ifndef HAVE_LOCALTIME_R
834 pthread_mutex_t localtime_mutex;
835 #endif /* ndef HAVE_GMTIME_R */
837 #ifndef HAVE_GETHOSTBYADDR_R
838 pthread_mutex_t gethostbyaddr_mutex;
839 #endif /* ndef HAVE_GETHOSTBYADDR_R */
841 #ifndef HAVE_GETHOSTBYNAME_R
842 pthread_mutex_t gethostbyname_mutex;
843 #endif /* ndef HAVE_GETHOSTBYNAME_R */
844 #endif /* FEATURE_PTHREAD */
846 #if defined(unix) || defined(__EMX__)
847 const char *basedir = NULL;
848 const char *pidfile = NULL;
849 int received_hup_signal = 0;
850 #endif /* defined unix */
852 /* The vanilla wafer. */
853 static const char VANILLA_WAFER[] =
854 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
855 "Do_not_send_me_any_copyrighted_information_other_than_the_"
856 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
857 "In_particular_do_not_send_me_any_cookies_that_"
858 "are_subject_to_a_claim_of_copyright_by_anybody._"
859 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
860 "(copyright_or_otherwise)_applying_to_any_cookie._";
862 /* HTTP snipplets. */
863 const char CSUCCEED[] =
864 "HTTP/1.0 200 Connection established\n"
865 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
867 const char CHEADER[] =
868 "HTTP/1.0 400 Invalid header received from browser\r\n"
869 "Connection: close\r\n\r\n"
870 "Invalid header received from browser.";
872 const char CFORBIDDEN[] =
873 "HTTP/1.0 403 Connection not allowable\r\n"
874 "X-Hint: If you read this message interactively, then you know why this happens ,-)\r\n"
875 "Connection: close\r\n\r\n";
877 const char FTP_RESPONSE[] =
878 "HTTP/1.0 400 Invalid request received from browser\r\n"
879 "Connection: close\r\n\r\n"
880 "Invalid request. Privoxy doesn't support FTP.\r\n";
882 const char GOPHER_RESPONSE[] =
883 "HTTP/1.0 400 Invalid request received from browser\r\n"
884 "Connection: close\r\n\r\n"
885 "Invalid request. Privoxy doesn't support gopher.\r\n";
887 const char MISSING_DESTINATION_RESPONSE[] =
888 "HTTP/1.0 400 Bad request received from browser\r\n"
889 "Connection: close\r\n\r\n"
890 "Bad request. Privoxy was unable to extract the destination.\r\n";
893 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
894 /*********************************************************************
896 * Function : sig_handler
898 * Description : Signal handler for different signals.
899 * Exit gracefully on ABRT, TERM and INT
900 * or set a flag that will cause the errlog
901 * to be reopened by the main thread on HUP.
904 * 1 : the_signal = the signal cause this function to call
908 *********************************************************************/
909 static void sig_handler(int the_signal)
916 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
927 received_hup_signal = 1;
932 * We shouldn't be here, unless we catch signals
933 * in main() that we can't handle here!
935 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
943 /*********************************************************************
947 * Description : Once a connection to the client has been accepted,
948 * this function is called (via serve()) to handle the
949 * main business of the communication. When this
950 * function returns, the caller must close the client
954 * 1 : csp = Current client state (buffers, headers, etc...)
956 * Returns : On success, the number of bytes written are returned (zero
957 * indicates nothing was written). On error, -1 is returned,
958 * and errno is set appropriately. If count is zero and the
959 * file descriptor refers to a regular file, 0 will be
960 * returned without causing any other effect. For a special
961 * file, the results are not portable.
963 *********************************************************************/
964 static void chat(struct client_state *csp)
967 * This next lines are a little ugly, but they simplifies the if statements
968 * below. Basically if TOGGLE, then we want the if to test if the
969 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
970 * then we want the if to test for CSP_FLAG_FORCED , else we don't
972 #ifdef FEATURE_TOGGLE
973 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
974 #else /* ifndef FEATURE_TOGGLE */
975 # define IS_TOGGLED_ON_AND
976 #endif /* ndef FEATURE_TOGGLE */
977 #ifdef FEATURE_FORCE_LOAD
978 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
979 #else /* ifndef FEATURE_FORCE_LOAD */
980 # define IS_NOT_FORCED_AND
981 #endif /* def FEATURE_FORCE_LOAD */
983 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
985 char buf[BUFFER_SIZE];
993 int ms_iis5_hack = 0;
995 unsigned int forwarded_connect_retries = 0;
996 unsigned int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
997 const struct forward_spec * fwd;
998 struct http_request *http;
999 int len; /* for buffer sizes */
1000 #ifdef FEATURE_KILL_POPUPS
1001 int block_popups; /* bool, 1==will block popups */
1002 int block_popups_now = 0; /* bool, 1==currently blocking popups */
1003 #endif /* def FEATURE_KILL_POPUPS */
1005 int pcrs_filter; /* bool, 1==will filter through pcrs */
1006 int gif_deanimate; /* bool, 1==will deanimate gifs */
1007 int jpeg_inspect; /* bool, 1==will inspect jpegs */
1009 /* Function that does the content filtering for the current request */
1010 char *(*content_filter)() = NULL;
1012 /* Skeleton for HTTP response, if we should intercept the request */
1013 struct http_response *rsp;
1015 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1016 struct list header_list;
1017 struct list *headers = &header_list;
1022 * Read the client's request. Note that since we're not using select() we
1023 * could get blocked here if a client connected, then didn't say anything!
1028 len = read_socket(csp->cfd, buf, sizeof(buf));
1030 if (len <= 0) break; /* error! */
1033 * If there is no memory left for buffering the
1034 * request, there is nothing we can do but hang up
1036 if (add_to_iob(csp, buf, len))
1041 req = get_header(csp);
1045 break; /* no HTTP request! */
1050 continue; /* more to come! */
1054 * If it's a FTP or gopher request, we don't support it.
1056 * These checks are better than nothing, but they might
1057 * not work in all configurations and some clients might
1058 * have problems digesting the answer.
1060 * They should, however, never cause more problems than
1061 * Privoxy's old behaviour (returning the misleading HTML error message:
1062 * "Could not resolve http://(ftp|gopher)://example.org").
1064 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1066 if (!strncmpic(req, "GET ftp://", 10))
1068 strcpy(buf, FTP_RESPONSE);
1069 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as FTP proxy: %s",
1070 csp->ip_addr_str, req);
1074 strcpy(buf, GOPHER_RESPONSE);
1075 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as gopher proxy: %s",
1076 csp->ip_addr_str, req);
1078 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1080 write_socket(csp->cfd, buf, strlen(buf));
1081 free_http_request(http);
1085 #ifdef FEATURE_FORCE_LOAD
1086 /* If this request contains the FORCE_PREFIX,
1087 * better get rid of it now and set the force flag --oes
1090 if (strstr(req, FORCE_PREFIX))
1092 strclean(req, FORCE_PREFIX);
1093 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
1094 csp->flags |= CSP_FLAG_FORCED;
1097 #endif /* def FEATURE_FORCE_LOAD */
1099 switch( parse_http_request(req, http, csp) )
1102 log_error(LOG_LEVEL_ERROR, "Out of memory while parsing request.");
1105 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", req);
1113 if (http->cmd == NULL)
1115 strcpy(buf, CHEADER);
1116 write_socket(csp->cfd, buf, strlen(buf));
1118 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
1120 free_http_request(http);
1124 /* grab the rest of the client's headers */
1128 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1130 len = read_socket(csp->cfd, buf, sizeof(buf));
1133 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1138 * If there is no memory left for buffering the
1139 * request, there is nothing we can do but hang up
1141 if (add_to_iob(csp, buf, len))
1148 if (p == NULL) break;
1155 if (http->host == NULL)
1158 * Intercepted or invalid request without domain
1159 * inside the request line. Try to get it another way.
1161 if (JB_ERR_OK == get_destination_from_headers(headers, http))
1163 /* Split the domain we just got for pattern matching */
1164 init_domain_components(http);
1168 /* We can't work without destination. Go spread the news.*/
1170 req = list_to_text(headers);
1172 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, http->cmd);
1173 log_error(LOG_LEVEL_ERROR,
1174 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1175 csp->ip_addr_str, http->cmd, req);
1178 strcpy(buf, MISSING_DESTINATION_RESPONSE);
1179 write_socket(csp->cfd, buf, strlen(buf));
1180 free_http_request(http);
1181 destroy_list(headers);
1185 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1186 * to get the destination IP address, use it as host directly
1187 * or do a reverse DNS lookup first.
1191 /* decide how to route the HTTP request */
1193 if ((fwd = forward_url(http, csp)) == NULL)
1195 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1196 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1199 /* build the http request to send to the server
1200 * we have to do one of the following:
1202 * create = use the original HTTP request to create a new
1203 * HTTP request that has either the path component
1204 * without the http://domainspec (w/path) or the
1205 * full orininal URL (w/url)
1206 * Note that the path and/or the HTTP version may
1207 * have been altered by now.
1209 * connect = Open a socket to the host:port of the server
1210 * and short-circuit server and client socket.
1212 * pass = Pass the request unchanged if forwarding a CONNECT
1213 * request to a parent proxy. Note that we'll be sending
1214 * the CFAIL message ourselves if connecting to the parent
1215 * fails, but we won't send a CSUCCEED message if it works,
1216 * since that would result in a double message (ours and the
1217 * parent's). After sending the request to the parent, we simply
1220 * here's the matrix:
1223 * +--------+--------+
1225 * 0 | create | connect|
1227 * Forwarding +--------+--------+
1229 * 1 | create | pass |
1231 * +--------+--------+
1236 * Determine the actions for this URL
1238 #ifdef FEATURE_TOGGLE
1239 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1241 /* Most compatible set of actions (i.e. none) */
1242 init_current_action(csp->action);
1245 #endif /* ndef FEATURE_TOGGLE */
1247 url_actions(http, csp);
1252 * Check if a CONNECT request is allowable:
1253 * In the absence of a +limit-connect action, allow only port 443.
1254 * If there is an action, allow whatever matches the specificaton.
1258 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
1259 || (csp->action->flags & ACTION_LIMIT_CONNECT
1260 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
1262 if (csp->action->flags & ACTION_TREAT_FORBIDDEN_CONNECTS_LIKE_BLOCKS)
1264 /* The response will violate the specs, but makes unblocking easier. */
1265 log_error(LOG_LEVEL_ERROR, "Marking suspicious CONNECT request from %s for blocking.",
1267 csp->action->flags |= ACTION_BLOCK;
1272 strcpy(buf, CFORBIDDEN);
1273 write_socket(csp->cfd, buf, strlen(buf));
1274 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
1275 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
1283 * Downgrade http version from 1.1 to 1.0 if +downgrade
1286 if ( (http->ssl == 0)
1287 && (!strcmpic(http->ver, "HTTP/1.1"))
1288 && (csp->action->flags & ACTION_DOWNGRADE))
1291 http->ver = strdup("HTTP/1.0");
1293 if (http->ver == NULL)
1295 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1300 * Save a copy of the original request for logging
1302 http->ocmd = strdup(http->cmd);
1304 if (http->ocmd == NULL)
1306 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
1310 * (Re)build the HTTP request for non-SSL requests.
1311 * If forwarding, use the whole URL, else, use only the path.
1317 http->cmd = strdup(http->gpc);
1318 string_append(&http->cmd, " ");
1320 if (fwd->forward_host)
1322 string_append(&http->cmd, http->url);
1326 string_append(&http->cmd, http->path);
1328 string_append(&http->cmd, " ");
1329 string_append(&http->cmd, http->ver);
1331 if (http->cmd == NULL)
1333 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1335 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", http->cmd);
1337 enlist(csp->headers, http->cmd);
1339 /* Append the previously read headers */
1340 list_append_list_unique(csp->headers, headers);
1341 destroy_list(headers);
1344 * If the user has not supplied any wafers, and the user has not
1345 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1347 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1348 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1350 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1354 #ifdef FEATURE_KILL_POPUPS
1355 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
1356 #endif /* def FEATURE_KILL_POPUPS */
1358 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
1359 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
1361 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
1363 jpeg_inspect = ((csp->action->flags & ACTION_JPEG_INSPECT) != 0);
1366 * We have a request. Now, check to see if we need to
1367 * intercept it, i.e. If ..
1371 /* We may not forward the request by rfc2616 sect 14.31 */
1372 (NULL != (rsp = direct_response(csp)))
1374 /* or we are enabled and... */
1375 || (IS_ENABLED_AND (
1377 /* ..the request was blocked */
1378 ( NULL != (rsp = block_url(csp)))
1380 /* ..or untrusted */
1381 #ifdef FEATURE_TRUST
1382 || ( NULL != (rsp = trust_url(csp)))
1383 #endif /* def FEATURE_TRUST */
1385 /* ..or a redirect kicked in */
1386 || ( NULL != (rsp = redirect_url(csp)))
1390 * .. or a CGI call was detected and answered.
1392 * This check comes last to give the user the power
1393 * to deny acces to some (or all) of the cgi pages.
1395 || (NULL != (rsp = dispatch_cgi(csp)))
1399 /* Write the answer to the client */
1400 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1401 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1403 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1406 #ifdef FEATURE_STATISTICS
1407 /* Count as a rejected request */
1408 csp->flags |= CSP_FLAG_REJECTED;
1409 #endif /* def FEATURE_STATISTICS */
1411 /* Log (FIXME: All intercept reasons appear as "crunch" with Status 200) */
1412 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
1413 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
1415 /* Clean up and return */
1416 free_http_response(rsp);
1420 hdr = sed(client_patterns, add_client_headers, csp);
1423 /* FIXME Should handle error properly */
1424 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1427 list_remove_all(csp->headers);
1429 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1431 if (fwd->forward_host)
1433 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1434 fwd->forward_host, fwd->forward_port, http->hostport);
1438 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1441 /* here we connect to the server, gateway, or the forwarder */
1443 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
1444 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
1446 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
1447 forwarded_connect_retries, http->hostport);
1450 if (csp->sfd == JB_INVALID_SOCKET)
1452 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1455 if (errno == EINVAL)
1457 rsp = error_response(csp, "no-such-domain", errno);
1459 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
1460 csp->ip_addr_str, http->ocmd);
1464 rsp = error_response(csp, "connect-failed", errno);
1466 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1467 csp->ip_addr_str, http->ocmd);
1471 /* Write the answer to the client */
1474 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1475 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1477 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1481 free_http_response(rsp);
1486 log_error(LOG_LEVEL_CONNECT, "OK");
1488 if (fwd->forward_host || (http->ssl == 0))
1490 /* write the client's (modified) header to the server
1491 * (along with anything else that may be in the buffer)
1494 if (write_socket(csp->sfd, hdr, strlen(hdr))
1495 || (flush_socket(csp->sfd, csp) < 0))
1497 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1500 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1501 csp->ip_addr_str, http->ocmd);
1503 rsp = error_response(csp, "connect-failed", errno);
1507 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1508 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1510 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1514 free_http_response(rsp);
1522 * We're running an SSL tunnel and we're not forwarding,
1523 * so just send the "connect succeeded" message to the
1524 * client, flush the rest, and get out of the way.
1526 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1527 csp->ip_addr_str, http->ocmd);
1529 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
1537 /* we're finished with the client's header */
1540 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1542 /* pass data between the client and server
1543 * until one or the other shuts down the connection.
1552 * FD_ZERO here seems to point to an errant macro which crashes.
1553 * So do this by hand for now...
1555 memset(&rfds,0x00,sizeof(fd_set));
1559 FD_SET(csp->cfd, &rfds);
1560 FD_SET(csp->sfd, &rfds);
1562 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
1566 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1570 /* this is the body of the browser's request
1571 * just read it and write it.
1574 if (FD_ISSET(csp->cfd, &rfds))
1576 len = read_socket(csp->cfd, buf, sizeof(buf));
1580 break; /* "game over, man" */
1583 if (write_socket(csp->sfd, buf, (size_t)len))
1585 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1592 * The server wants to talk. It could be the header or the body.
1593 * If `hdr' is null, then it's the header otherwise it's the body.
1594 * FIXME: Does `hdr' really mean `host'? No.
1598 if (FD_ISSET(csp->sfd, &rfds))
1601 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1605 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1607 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1608 csp->ip_addr_str, http->ocmd);
1610 rsp = error_response(csp, "connect-failed", errno);
1614 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1615 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1617 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1621 free_http_response(rsp);
1625 /* Add a trailing zero. This lets filter_popups
1626 * use string operations.
1630 #ifdef FEATURE_KILL_POPUPS
1631 /* Filter the popups on this read. */
1632 if (block_popups_now)
1634 filter_popups(buf, csp);
1636 #endif /* def FEATURE_KILL_POPUPS */
1638 /* Normally, this would indicate that we've read
1639 * as much as the server has sent us and we can
1640 * close the client connection. However, Microsoft
1641 * in its wisdom has released IIS/5 with a bug that
1642 * prevents it from sending the trailing \r\n in
1643 * a 302 redirect header (and possibly other headers).
1644 * To work around this if we've haven't parsed
1645 * a full header we'll append a trailing \r\n
1646 * and see if this now generates a valid one.
1648 * This hack shouldn't have any impacts. If we've
1649 * already transmitted the header or if this is a
1650 * SSL connection, then we won't bother with this
1651 * hack. So we only work on partially received
1652 * headers. If we append a \r\n and this still
1653 * doesn't generate a valid header, then we won't
1654 * transmit anything to the client.
1659 if (server_body || http->ssl)
1662 * If we have been buffering up the document,
1663 * now is the time to apply content modification
1664 * and send the result to the client.
1669 * If the content filter fails, use the original
1670 * buffer and length.
1671 * (see p != NULL ? p : csp->iob->cur below)
1673 if (NULL == (p = (*content_filter)(csp)))
1675 csp->content_length = csp->iob->eod - csp->iob->cur;
1678 hdr = sed(server_patterns_light, NULL, csp);
1682 /* FIXME Should handle error properly */
1683 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1686 if (write_socket(csp->cfd, hdr, strlen(hdr))
1687 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
1689 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1699 break; /* "game over, man" */
1703 * This is NOT the body, so
1704 * Let's pretend the server just sent us a blank line.
1706 len = sprintf(buf, "\r\n");
1709 * Now, let the normal header parsing algorithm below do its
1710 * job. If it fails, we'll exit instead of continuing.
1717 * If this is an SSL connection or we're in the body
1718 * of the server document, just write it to the client,
1719 * unless we need to buffer the body for later content-filtering
1722 if (server_body || http->ssl)
1727 * If there is no memory left for buffering the content, or the buffer limit
1728 * has been reached, switch to non-filtering mode, i.e. make & write the
1729 * header, flush the iob and buf, and get out of the way.
1731 if (add_to_iob(csp, buf, len))
1736 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
1738 hdr = sed(server_patterns, add_server_headers, csp);
1742 * Memory is too tight to even generate the header.
1743 * Send our static "Out-of-memory" page.
1745 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
1746 rsp = cgi_error_memory();
1748 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1749 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1751 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1756 hdrlen = strlen(hdr);
1758 if (write_socket(csp->cfd, hdr, hdrlen)
1759 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
1760 || (write_socket(csp->cfd, buf, (size_t) len)))
1762 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
1768 byte_count += hdrlen + flushed + len;
1770 content_filter = NULL;
1777 if (write_socket(csp->cfd, buf, (size_t)len))
1779 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
1788 /* we're still looking for the end of the
1789 * server's header ... (does that make header
1790 * parsing an "out of body experience" ?
1794 * buffer up the data we just read. If that fails,
1795 * there's little we can do but send our static
1796 * out-of-memory page.
1798 if (add_to_iob(csp, buf, len))
1800 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
1801 rsp = cgi_error_memory();
1803 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1804 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1806 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1811 /* get header lines from the iob */
1813 while ((p = get_header(csp)) != NULL)
1817 /* see following note */
1820 enlist(csp->headers, p);
1824 /* NOTE: there are no "empty" headers so
1825 * if the pointer `p' is not NULL we must
1826 * assume that we reached the end of the
1827 * buffer before we hit the end of the header.
1834 /* Well, we tried our MS IIS/5
1835 * hack and it didn't work.
1836 * The header is incomplete
1837 * and there isn't anything
1838 * we can do about it.
1844 /* Since we have to wait for
1845 * more from the server before
1846 * we can parse the headers
1847 * we just continue here.
1853 /* we have now received the entire header.
1854 * filter it and send the result to the client
1857 hdr = sed(server_patterns, add_server_headers, csp);
1860 /* FIXME Should handle error properly */
1861 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1864 #ifdef FEATURE_KILL_POPUPS
1865 /* Start blocking popups if appropriate. */
1867 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1868 !http->ssl && /* We talk plaintext */
1869 block_popups) /* Policy allows */
1871 block_popups_now = 1;
1873 * Filter the part of the body that came in the same read
1874 * as the last headers:
1876 filter_popups(csp->iob->cur, csp);
1879 #endif /* def FEATURE_KILL_POPUPS */
1881 /* Buffer and pcrs filter this if appropriate. */
1883 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1884 !http->ssl && /* We talk plaintext */
1885 pcrs_filter) /* Policy allows */
1887 content_filter = pcrs_filter_response;
1890 /* Buffer and gif_deanimate this if appropriate. */
1892 if ((csp->content_type & CT_GIF) && /* It's an image/gif MIME-Type */
1893 !http->ssl && /* We talk plaintext */
1894 gif_deanimate) /* Policy allows */
1896 content_filter = gif_deanimate_response;
1899 /* Buffer and jpg_inspect this if appropriate. */
1901 if ((csp->content_type & CT_JPEG) && /* It's an image/jpeg MIME-Type */
1902 !http->ssl && /* We talk plaintext */
1903 jpeg_inspect) /* Policy allows */
1905 content_filter = jpeg_inspect_response;
1909 * Only write if we're not buffering for content modification
1911 if (!content_filter)
1913 /* write the server's (modified) header to
1914 * the client (along with anything else that
1915 * may be in the buffer)
1918 if (write_socket(csp->cfd, hdr, strlen(hdr))
1919 || ((len = flush_socket(csp->cfd, csp)) < 0))
1921 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1923 /* the write failed, so don't bother
1924 * mentioning it to the client...
1925 * it probably can't hear us anyway.
1934 /* we're finished with the server's header */
1939 /* If this was a MS IIS/5 hack then it means
1940 * the server has already closed the
1941 * connection. Nothing more to read. Time
1952 return; /* huh? we should never get here */
1955 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
1956 csp->ip_addr_str, http->ocmd, byte_count);
1960 /*********************************************************************
1964 * Description : This is little more than chat. We only "serve" to
1965 * to close any socket that chat may have opened.
1968 * 1 : csp = Current client state (buffers, headers, etc...)
1972 *********************************************************************/
1974 void serve(struct client_state *csp)
1975 #else /* ifndef AMIGA */
1976 static void serve(struct client_state *csp)
1977 #endif /* def AMIGA */
1980 close_socket(csp->cfd);
1982 if (csp->sfd != JB_INVALID_SOCKET)
1984 close_socket(csp->sfd);
1987 csp->flags &= ~CSP_FLAG_ACTIVE;
1993 /*********************************************************************
1995 * Function : server_thread
1997 * Description : We only exist to call `serve' in a threaded environment.
2000 * 1 : data = Current client state (buffers, headers, etc...)
2002 * Returns : Always 0.
2004 *********************************************************************/
2005 static int32 server_thread(void *data)
2007 serve((struct client_state *) data);
2014 /*********************************************************************
2018 * Description : Print usage info & exit.
2020 * Parameters : Pointer to argv[0] for identifying ourselves
2024 *********************************************************************/
2025 void usage(const char *myname)
2027 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
2029 "Usage: %s [--help] [--version] [configfile]\n"
2031 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
2033 "Aborting.\n", myname);
2040 /*********************************************************************
2044 * Description : Load the config file and start the listen loop.
2045 * This function is a lot more *sane* with the `load_config'
2046 * and `listen_loop' functions; although it stills does
2047 * a *little* too much for my taste.
2050 * 1 : argc = Number of parameters (including $0).
2051 * 2 : argv = Array of (char *)'s to the parameters.
2053 * Returns : 1 if : can't open config file, unrecognized directive,
2054 * stats requested in multi-thread mode, can't open the
2055 * log file, can't open the jar file, listen port is invalid,
2056 * any load fails, and can't bind port.
2058 * Else main never returns, the process must be signaled
2059 * to terminate execution. Or, on Windows, use the
2060 * "File", "Exit" menu option.
2062 *********************************************************************/
2064 int real_main(int argc, const char *argv[])
2066 int main(int argc, const char *argv[])
2071 unsigned int random_seed;
2072 #endif /* ifdef HAVE_RANDOM */
2074 struct passwd *pw = NULL;
2075 struct group *grp = NULL;
2084 #if !defined(_WIN32)
2092 * Parse the command line arguments
2094 while (++argc_pos < argc)
2097 /* Check to see if the service must be installed or uninstalled */
2098 if (strncmp(argv[argc_pos], "--install", 9) == 0)
2100 const char *pName = argv[argc_pos] + 9;
2103 exit( (install_service(pName)) ? 0 : 1 );
2105 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
2107 const char *pName = argv[argc_pos] + 11;
2110 exit((uninstall_service(pName)) ? 0 : 1);
2112 else if (strcmp(argv[argc_pos], "--service" ) == 0)
2114 bRunAsService = TRUE;
2115 w32_set_service_cwd();
2116 atexit(w32_service_exit_notify);
2119 #endif /* defined(_WIN32) */
2122 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2124 if (strcmp(argv[argc_pos], "--help") == 0)
2129 else if(strcmp(argv[argc_pos], "--version") == 0)
2131 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
2137 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
2142 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
2144 if (++argc_pos == argc) usage(argv[0]);
2145 pidfile = strdup(argv[argc_pos]);
2148 else if (strcmp(argv[argc_pos], "--user" ) == 0)
2150 if (++argc_pos == argc) usage(argv[argc_pos]);
2152 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
2155 if (NULL == (grp = getgrnam(p)))
2157 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
2161 if (NULL == (pw = getpwnam(argv[argc_pos])))
2163 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
2166 if (p != NULL) *--p = '\0';
2169 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
2174 #endif /* defined(unix) */
2175 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
2177 configfile = argv[argc_pos];
2180 } /* -END- while (more arguments) */
2183 if ( *configfile != '/' )
2185 char *abs_file, cwd[1024];
2187 /* make config-filename absolute here */
2188 if ( !(getcwd(cwd, sizeof(cwd))))
2190 perror("get working dir failed");
2194 if (!(basedir = strdup(cwd))
2195 || (!(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))))
2197 perror("malloc failed");
2200 strcpy( abs_file, basedir );
2201 strcat( abs_file, "/" );
2202 strcat( abs_file, configfile );
2203 configfile = abs_file;
2205 #endif /* defined unix */
2209 clients->next = NULL;
2213 #elif defined(_WIN32)
2217 #ifdef FEATURE_PTHREAD
2219 * Prepare global mutex semaphores
2221 pthread_mutex_init(&log_mutex,0);
2222 pthread_mutex_init(&log_init_mutex,0);
2224 #ifndef HAVE_GMTIME_R
2225 pthread_mutex_init(&gmtime_mutex,0);
2226 #endif /* ndef HAVE_GMTIME_R */
2228 #ifndef HAVE_LOCALTIME_R
2229 pthread_mutex_init(&localtime_mutex,0);
2230 #endif /* ndef HAVE_GMTIME_R */
2232 #ifndef HAVE_GETHOSTBYADDR_R
2233 pthread_mutex_init(&gethostbyaddr_mutex,0);
2234 #endif /* ndef HAVE_GETHOSTBYADDR_R */
2236 #ifndef HAVE_GETHOSTBYNAME_R
2237 pthread_mutex_init(&gethostbyname_mutex,0);
2238 #endif /* ndef HAVE_GETHOSTBYNAME_R */
2239 #endif /* FEATURE_PTHREAD */
2242 random_seed = (unsigned int)time(NULL);
2243 srandom(random_seed);
2244 #endif /* ifdef HAVE_RANDOM */
2247 * Unix signal handling
2249 * Catch the abort, interrupt and terminate signals for a graceful exit
2250 * Catch the hangup signal so the errlog can be reopened.
2251 * Ignore the broken pipe signals (FIXME: Why?)
2253 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
2256 const int catched_signals[] = { SIGABRT, SIGTERM, SIGINT, SIGHUP, 0 };
2257 const int ignored_signals[] = { SIGPIPE, 0 };
2259 for (idx = 0; catched_signals[idx] != 0; idx++)
2261 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
2262 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
2264 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
2265 #endif /* ifdef sun */
2267 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
2271 for (idx = 0; ignored_signals[idx] != 0; idx++)
2273 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
2275 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
2280 #else /* ifdef _WIN32 */
2281 # ifdef _WIN_CONSOLE
2283 * We *are* in a windows console app.
2284 * Print a verbose messages about FAQ's and such
2286 printf(win32_blurb);
2287 # endif /* def _WIN_CONSOLE */
2288 #endif /* def _WIN32 */
2291 /* Initialize the CGI subsystem */
2292 cgi_init_error_messages();
2295 * If runnig on unix and without the --nodaemon
2296 * option, become a daemon. I.e. fork, detach
2297 * from tty and get process group leadership
2310 if ( pid < 0 ) /* error */
2315 else if ( pid != 0 ) /* parent */
2320 * must check for errors
2321 * child died due to missing files aso
2324 wpid = waitpid( pid, &status, WNOHANG );
2333 /* Should be more portable, but not as well tested */
2338 #else /* ndef __FreeBSD__ */
2340 #endif /* ndef __FreeBSD__ */
2341 fd = open("/dev/tty", O_RDONLY);
2344 /* no error check here */
2345 ioctl( fd, TIOCNOTTY,0 );
2349 /* FIXME: should close stderr (fd 2) here too, but the test
2351 * and load config file is done in listen_loop() and puts
2352 * some messages on stderr there.
2359 } /* -END- if (!no_daemon) */
2362 * As soon as we have written the PID file, we can switch
2363 * to the user and group ID indicated by the --user option
2369 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
2371 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
2377 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
2379 if (chroot(pw->pw_dir) < 0)
2381 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
2385 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
2388 if (setuid(pw->pw_uid))
2390 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
2394 char putenv_dummy[64];
2396 strcpy(putenv_dummy, "HOME=/");
2397 if (putenv(putenv_dummy) != 0)
2399 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
2402 snprintf(putenv_dummy, 64, "USER=%s", pw->pw_name);
2403 if (putenv(putenv_dummy) != 0)
2405 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
2411 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
2414 #endif /* defined unix */
2417 /* This will be FALSE unless the command line specified --service
2421 /* Yup, so now we must attempt to establish a connection
2422 * with the service dispatcher. This will only work if this
2423 * process was launched by the service control manager to
2424 * actually run as a service. If this isn't the case, i've
2425 * known it take around 30 seconds or so for the call to return.
2428 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
2429 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
2431 /* Service has run, and at this point is now being stopped, so just return */
2436 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
2438 /* An error occurred. Usually it's because --service was wrongly specified
2439 * and we were unable to connect to the Service Control Dispatcher because
2440 * it wasn't expecting us and is therefore not listening.
2442 * For now, just continue below to call the listen_loop function.
2445 #endif /* def _WIN32 */
2455 /*********************************************************************
2457 * Function : bind_port_helper
2459 * Description : Bind the listen port. Handles logging, and aborts
2463 * 1 : config = Privoxy configuration. Specifies port
2466 * Returns : Port that was opened.
2468 *********************************************************************/
2469 static jb_socket bind_port_helper(struct configuration_spec * config)
2474 if ( (config->haddr != NULL)
2475 && (config->haddr[0] == '1')
2476 && (config->haddr[1] == '2')
2477 && (config->haddr[2] == '7')
2478 && (config->haddr[3] == '.') )
2480 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
2483 else if (config->haddr == NULL)
2485 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
2490 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
2491 config->hport, config->haddr);
2494 result = bind_port(config->haddr, config->hport, &bfd);
2501 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2502 "There may be another Privoxy or some other "
2503 "proxy running on port %d",
2504 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
2505 config->hport, config->hport);
2508 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2509 "The hostname is not resolvable",
2510 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2513 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
2514 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2517 /* shouldn't get here */
2518 return JB_INVALID_SOCKET;
2521 config->need_bind = 0;
2528 /* Without this simple workaround we get this compiler warning from _beginthread
2529 * warning C4028: formal parameter 1 different from declaration
2531 void w32_service_listen_loop(void *p)
2535 #endif /* def _WIN32 */
2538 /*********************************************************************
2540 * Function : listen_loop
2542 * Description : bind the listen port and enter a "FOREVER" listening loop.
2548 *********************************************************************/
2549 static void listen_loop(void)
2551 struct client_state *csp = NULL;
2553 struct configuration_spec * config;
2555 config = load_config();
2557 bfd = bind_port_helper(config);
2559 #ifdef FEATURE_GRACEFUL_TERMINATION
2560 while (!g_terminate)
2565 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
2566 while (waitpid(-1, NULL, WNOHANG) > 0)
2568 /* zombie children */
2570 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
2573 * Free data that was used by died threads
2579 * Re-open the errlog after HUP signal
2581 if (received_hup_signal)
2583 init_error_log(Argv[0], config->logfile, config->debug);
2584 received_hup_signal = 0;
2589 #ifdef FEATURE_COOKIE_JAR
2591 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
2592 * already open. I think unload_configfile() is not being run, which should do
2593 * this work. Until that can get resolved, we'll use this workaround.
2597 if (csp->config->jar)
2599 fclose(csp->config->jar);
2600 csp->config->jar = NULL;
2602 #endif /* FEATURE_COOKIE_JAR */
2603 #endif /* __OS2__ */
2605 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
2607 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
2611 csp->flags |= CSP_FLAG_ACTIVE;
2612 csp->sfd = JB_INVALID_SOCKET;
2614 csp->config = config = load_config();
2616 if ( config->need_bind )
2619 * Since we were listening to the "old port", we will not see
2620 * a "listen" param change until the next IJB request. So, at
2621 * least 1 more request must be made for us to find the new
2622 * setting. I am simply closing the old socket and binding the
2625 * Which-ever is correct, we will serve 1 more page via the
2626 * old settings. This should probably be a "show-proxy-args"
2627 * request. This should not be a so common of an operation
2628 * that this will hurt people's feelings.
2633 bfd = bind_port_helper(config);
2636 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
2638 if (!accept_connection(csp, bfd))
2640 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
2653 log_error(LOG_LEVEL_CONNECT, "OK");
2656 #ifdef FEATURE_TOGGLE
2657 if (global_toggle_state)
2659 csp->flags |= CSP_FLAG_TOGGLED_ON;
2661 #endif /* def FEATURE_TOGGLE */
2663 if (run_loader(csp))
2665 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
2666 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2670 if (block_acl(NULL,csp))
2672 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
2673 close_socket(csp->cfd);
2677 #endif /* def FEATURE_ACL */
2679 /* add it to the list of clients */
2680 csp->next = clients->next;
2681 clients->next = csp;
2683 if (config->multi_threaded)
2687 /* this is a switch () statment in the C preprocessor - ugh */
2688 #undef SELECTED_ONE_OPTION
2690 /* Use Pthreads in preference to native code */
2691 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
2692 #define SELECTED_ONE_OPTION
2694 pthread_t the_thread;
2695 pthread_attr_t attrs;
2697 pthread_attr_init(&attrs);
2698 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
2699 errno = pthread_create(&the_thread, &attrs,
2701 child_id = errno ? -1 : 0;
2702 pthread_attr_destroy(&attrs);
2706 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
2707 #define SELECTED_ONE_OPTION
2708 child_id = _beginthread(
2709 (void (*)(void *))serve,
2714 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
2715 #define SELECTED_ONE_OPTION
2716 child_id = _beginthread(
2717 (void(* _Optlink)(void*))serve,
2723 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
2724 #define SELECTED_ONE_OPTION
2726 thread_id tid = spawn_thread
2727 (server_thread, "server", B_NORMAL_PRIORITY, csp);
2729 if ((tid >= 0) && (resume_thread(tid) == B_OK))
2731 child_id = (int) tid;
2740 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2741 #define SELECTED_ONE_OPTION
2742 csp->cfd = ReleaseSocket(csp->cfd, -1);
2744 if((child_id = (int)CreateNewProcTags(
2745 NP_Entry, (ULONG)server_thread,
2746 NP_Output, Output(),
2747 NP_CloseOutput, FALSE,
2748 NP_Name, (ULONG)"privoxy child",
2749 NP_StackSize, 200*1024,
2753 ((struct Task *)child_id)->tc_UserData = csp;
2754 Signal((struct Task *)child_id, SIGF_SINGLE);
2759 #if !defined(SELECTED_ONE_OPTION)
2762 /* This block is only needed when using fork().
2763 * When using threads, the server thread was
2764 * created and run by the call to _beginthread().
2766 if (child_id == 0) /* child */
2769 #ifdef FEATURE_TOGGLE
2770 int inherited_toggle_state = global_toggle_state;
2771 #endif /* def FEATURE_TOGGLE */
2776 * If we've been toggled or we've blocked the request, tell Mom
2779 #ifdef FEATURE_TOGGLE
2780 if (inherited_toggle_state != global_toggle_state)
2782 rc |= RC_FLAG_TOGGLED;
2784 #endif /* def FEATURE_TOGGLE */
2786 #ifdef FEATURE_STATISTICS
2787 if (csp->flags & CSP_FLAG_REJECTED)
2789 rc |= RC_FLAG_BLOCKED;
2791 #endif /* ndef FEATURE_STATISTICS */
2795 else if (child_id > 0) /* parent */
2797 /* in a fork()'d environment, the parent's
2798 * copy of the client socket and the CSP
2802 #if !defined(_WIN32) && !defined(__CYGWIN__)
2804 wait( &child_status );
2807 * Evaluate child's return code: If the child has
2808 * - been toggled, toggle ourselves
2809 * - blocked its request, bump up the stats counter
2812 #ifdef FEATURE_TOGGLE
2813 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
2815 global_toggle_state = !global_toggle_state;
2817 #endif /* def FEATURE_TOGGLE */
2819 #ifdef FEATURE_STATISTICS
2821 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
2825 #endif /* def FEATURE_STATISTICS */
2827 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
2828 close_socket(csp->cfd);
2829 csp->flags &= ~CSP_FLAG_ACTIVE;
2833 #undef SELECTED_ONE_OPTION
2834 /* end of cpp switch () */
2836 if (child_id < 0) /* failed */
2838 char buf[BUFFER_SIZE];
2840 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
2842 sprintf(buf , "Privoxy: can't fork: errno = %d", errno);
2844 write_socket(csp->cfd, buf, strlen(buf));
2845 close_socket(csp->cfd);
2846 csp->flags &= ~CSP_FLAG_ACTIVE;
2857 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
2859 /* Clean up. Aim: free all memory (no leaks) */
2860 #ifdef FEATURE_GRACEFUL_TERMINATION
2862 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
2864 unload_current_config_file();
2865 unload_current_actions_file();
2866 unload_current_re_filterfile();
2867 #ifdef FEATURE_TRUST
2868 unload_current_trust_file();
2871 if (config->multi_threaded)
2878 } while ((clients->next != NULL) && (--i > 0));
2882 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
2893 #ifdef FEATURE_COOKIE_JAR
2894 if (NULL != config->jar)
2896 fclose(config->jar);
2900 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
2901 /* Cleanup - remove taskbar icon etc. */
2906 #endif /* FEATURE_GRACEFUL_TERMINATION */