1 const char jcc_rcs[] = "$Id: jcc.c,v 1.118 2007/01/07 07:43:43 joergs 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) 2001-2007 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 1.118 2007/01/07 07:43:43 joergs
37 * AmigaOS4 support added.
39 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
40 * Added config option accept-intercepted-requests
41 * and disabled it by default.
43 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
44 * Reverted parts of my last commit
45 * to keep error handling working.
47 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
48 * Fixed gcc43 conversion warnings.
50 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
51 * Fix -pedantic ISO C warning about converting
52 * from function pointer to object pointer.
54 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
55 * Silence compiler warning I introduced with my last commit.
57 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
58 * Mutex protect rand() if POSIX threading
59 * is used, warn the user if that's not possible
60 * and stop using it on _WIN32 where it could
63 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
64 * Don't prevent core dumps by catching SIGABRT.
65 * It's rude and makes debugging unreasonable painful.
67 * Revision 1.110 2006/12/13 14:52:53 etresoft
68 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
70 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
71 * Privoxy is now able to run as intercepting
72 * proxy in combination with any packet filter
73 * that does the port redirection. The destination
74 * is extracted from the "Host:" header which
75 * should be available for nearly all requests.
77 * Moved HTTP snipplets into jcc.c.
78 * Added error message for gopher proxy requests.
80 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
81 * Only unlink the pidfile if it's actually used.
83 * Change order of interception checks to make
84 * it possible to block or redirect requests for
87 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
88 * Make pthread mutex locking more generic. Instead of
89 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
90 * and use mutex locking unless there is an _r function
91 * available. Better safe than sorry.
93 * Fixes "./configure --disable-pthread" and should result
94 * in less threading-related problems on pthread-using platforms,
95 * but it still doesn't fix BR#1122404.
97 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
98 * Move pthread.h inclusion from jcc.c to jcc.h.
99 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
101 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
102 * Don't exit after receiving the second SIGHUP on Solaris.
104 * Fixes BR 1052235, but the same problem may exist on other
105 * systems. Once 3.0.6 is out we should use sigset()
106 * where available and see if it breaks anything.
108 * Revision 1.104 2006/09/23 13:26:38 roro
109 * Replace TABs by spaces in source code.
111 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
112 * Fix +redirect{}. Didn't work with -fast-redirects.
114 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
115 * Respond with 400 and a short text message
116 * if the client tries to use Privoxy as FTP proxy.
118 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
119 * Make number of retries in case of forwarded-connect problems
120 * a config file option (forwarded-connect-retries) and use 0 as
123 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
124 * Set random(3) seed.
126 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
127 * Follow the OpenBSD port's lead and protect the resolve
128 * functions on OpenBSD as well.
130 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
131 * --user fix. Only use the user as group if no group is specified.
132 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
134 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
135 * Windows service (re-)integration
139 * --install[:service_name]
140 * --uninstall[:service_name]
143 * They work as follows:
144 * --install will create a service for you and then terminate.
145 * By default the service name will be "privoxy" (without the quotes).
146 * However you can run multiple services if you wish, just by adding
147 * a colon and then a name (no spaces).
149 * --uninstall follows the exact same rules a --install.
151 * --service is used when the program is executed by the service
152 * control manager, and in normal circumstances would never be
153 * used as a command line argument.
155 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
156 * Windows service integration
158 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
159 * Incorporate Fabian Keil's patch work:
160 http://www.fabiankeil.de/sourcecode/privoxy/
162 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
163 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
164 * with what was really the latest development (the v_3_0_branch branch)
166 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
167 * Thanks to Jindrich Makovicka for a race condition fix for the log
168 * file. The race condition remains for non-pthread implementations.
169 * Reference patch #1175720.
171 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
172 * Add the ability to check jpeg images for invalid
173 * lengths of comment blocks. Defensive strategy
174 * against the exploit:
175 * Microsoft Security Bulletin MS04-028
176 * Buffer Overrun in JPEG Processing (GDI+) Could
177 * Allow Code Execution (833987)
178 * Enabled with +inspect-jpegs in actions files.
180 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
181 * - Fixed usage info for non-unix platforms
182 * - Fixed small cmdline parsing bug
184 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
185 * Diagnostics: Now preserve the returncode of pthread_create
186 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
188 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
189 * No longer ignore SIGCHLD. Fixes bug #769381
191 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
192 * Close jarfile on graceful exit, remove stray line
194 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
195 * Cosmetics: Killed a warning, a typo and an allocation left at exit
197 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
198 * No longer rely on non-POSIX.1 extensions of getcwd().
201 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
202 * Replaced setenv() by posix-compliant putenv()
203 * Thanks to Neil McCalden (nmcc AT users.sf.net).
205 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
206 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
208 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
209 * Clean-up and extension of improvements for forked mode:
210 * - Child's return code now consists of flags RC_FLAG_*
211 * - Reporting toggle to parent now properly #ifdef'ed
212 * - Children now report blocking to parent. This enables
213 * statistics in forked mode
215 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
216 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
217 * Children now report having been toggled through _exit(17), parents
218 * watch for that code and toggle themselves if found.
220 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
221 * Wrapping all *_r functions (the non-_r versions of them) with
222 * mutex semaphores for OSX. Hopefully this will take care of all
223 * of those pesky crash reports.
225 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
226 * Fixed two mostly harmless mem leaks
228 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
229 * Fix: Head of global clients list now initialized to NULL
231 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
232 * Added basic support for OPTIONS and TRACE HTTP methods:
233 * - New interceptor direct_response() added in chat().
234 * - sed() moved to earlier in the process, so that the
235 * Host: header is evaluated before actions and forwarding
238 * Revision 1.92 2002/05/08 16:00:46 oes
239 * Chat's buffer handling:
240 * - Fixed bug with unchecked out-of-mem conditions
241 * while reading client request & server headers
242 * - No longer predict if the buffer limit will be exceeded
243 * in the next read -- check add_to_iob's new
244 * return code. If buffer couldn't be extended
245 * (policy or out-of-mem) while
246 * - reading from client: abort
247 * - reading server headers: send error page
248 * - buffering server body for filter: flush,
249 * and if that fails: send error page
251 * Revision 1.91 2002/04/08 20:35:58 swa
254 * Revision 1.90 2002/04/02 14:57:28 oes
255 * Made sending wafers independent of FEATURE_COOKIE_JAR
257 * Revision 1.89 2002/03/31 17:18:59 jongfoster
258 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
260 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
261 * More compiler warning message maintenance
263 * Revision 1.87 2002/03/26 22:29:54 swa
264 * we have a new homepage!
266 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
267 * Workaround for closing the jarfile before load_config() comes around again
269 * Revision 1.85 2002/03/24 15:23:33 jongfoster
272 * Revision 1.84 2002/03/24 13:25:43 swa
273 * name change related issues
275 * Revision 1.83 2002/03/16 23:54:06 jongfoster
276 * Adding graceful termination feature, to help look for memory leaks.
277 * If you enable this (which, by design, has to be done by hand
278 * editing config.h) and then go to http://i.j.b/die, then the program
279 * will exit cleanly after the *next* request. It should free all the
280 * memory that was used.
282 * Revision 1.82 2002/03/13 00:27:05 jongfoster
285 * Revision 1.81 2002/03/12 01:42:50 oes
286 * Introduced modular filters
288 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
289 * OS/2 port maintenance:
290 * - Fixed EMX build - it had decayed a little
291 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
292 * substituted a memset for now.
294 * Revision 1.79 2002/03/09 20:03:52 jongfoster
295 * - Making various functions return int rather than size_t.
296 * (Undoing a recent change). Since size_t is unsigned on
297 * Windows, functions like read_socket that return -1 on
298 * error cannot return a size_t.
300 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
301 * crashes, and also frequently caused JB to jump to 100%
302 * CPU and stay there. (Because it thought it had just
303 * read ((unsigned)-1) == 4Gb of data...)
305 * - The signature of write_socket has changed, it now simply
306 * returns success=0/failure=nonzero.
308 * - Trying to get rid of a few warnings --with-debug on
309 * Windows, I've introduced a new type "jb_socket". This is
310 * used for the socket file descriptors. On Windows, this
311 * is SOCKET (a typedef for unsigned). Everywhere else, it's
312 * an int. The error value can't be -1 any more, so it's
313 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
314 * Windows it maps to the #define INVALID_SOCKET.)
316 * - The signature of bind_port has changed.
318 * Revision 1.78 2002/03/08 21:35:04 oes
319 * Added optional group supplement to --user option. Will now use default group of user if no group given
321 * Revision 1.77 2002/03/07 03:52:06 oes
322 * - Fixed compiler warnings etc
323 * - Improved handling of failed DNS lookups
325 * Revision 1.76 2002/03/06 22:54:35 jongfoster
326 * Automated function-comment nitpicking.
328 * Revision 1.75 2002/03/06 10:02:19 oes
329 * Fixed stupid bug when --user was not given
331 * Revision 1.74 2002/03/06 00:49:31 jongfoster
332 * Fixing warning on Windows
333 * Making #ifdefs that refer to the same variable consistently
334 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
336 * Revision 1.73 2002/03/05 23:57:30 hal9
337 * Stray character 's' on line 1618 was breaking build.
339 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
340 * - Re-enable OS/2 building after new parms were added
341 * - Fix false out of memory report when resolving CGI templates when no IP
342 * address is available of failed attempt (a la no such domain)
344 * Revision 1.71 2002/03/05 18:13:56 oes
345 * Added --user option
347 * Revision 1.70 2002/03/05 04:52:42 oes
348 * Deleted non-errlog debugging code
350 * Revision 1.69 2002/03/04 23:50:00 jongfoster
351 * Splitting off bind_port() call into bind_port_helper(), with
354 * Revision 1.68 2002/03/04 20:17:32 oes
357 * Revision 1.67 2002/03/04 18:18:57 oes
358 * - Removed _DEBUG mode
359 * - Cleand up cmdline parsing
360 * - Introduced --no-daemon, --pidfile options
361 * - Cleaned up signal handling:
362 * - Terminate cleanly on INT, TERM and ABRT
363 * - Schedule logfile for re-opening on HUP
364 * - Ignore CHLD and PIPE
365 * - Leave the rest with their default handlers
366 * - Uniform handler registration
367 * - Added usage() function
368 * - Played styleguide police
370 * Revision 1.66 2002/03/03 15:06:55 oes
371 * Re-enabled automatic config reloading
373 * Revision 1.65 2002/03/03 14:49:11 oes
374 * Fixed CLF logging: Now uses client's original HTTP request
376 * Revision 1.64 2002/03/03 09:18:03 joergs
377 * Made jumbjuster work on AmigaOS again.
379 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
380 * Clean up a little CRLF unpleasantness that suddenly appeared
382 * Revision 1.62 2002/02/20 23:17:23 jongfoster
383 * Detecting some out-of memory conditions and exiting with a log message.
385 * Revision 1.61 2002/01/17 21:01:52 jongfoster
386 * Moving all our URL and URL pattern parsing code to urlmatch.c.
388 * Revision 1.60 2001/12/30 14:07:32 steudten
389 * - Add signal handling (unix)
390 * - Add SIGHUP handler (unix)
391 * - Add creation of pidfile (unix)
392 * - Add action 'top' in rc file (RH)
393 * - Add entry 'SIGNALS' to manpage
394 * - Add exit message to logfile (unix)
396 * Revision 1.59 2001/12/13 14:07:18 oes
397 * Fixed Bug: 503 error page now sent OK
399 * Revision 1.58 2001/11/30 23:37:24 jongfoster
400 * Renaming the Win32 config file to config.txt - this is almost the
401 * same as the corresponding UNIX name "config"
403 * Revision 1.57 2001/11/16 00:47:43 jongfoster
404 * Changing the tty-disconnection code to use setsid().
406 * Revision 1.56 2001/11/13 20:20:54 jongfoster
407 * Tabs->spaces, fixing a bug with missing {} around an if()
409 * Revision 1.55 2001/11/13 20:14:53 jongfoster
410 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
412 * Revision 1.54 2001/11/07 00:03:14 steudten
413 * Give reliable return value if an error
414 * occurs not just 0 with new daemon mode.
416 * Revision 1.53 2001/11/05 21:41:43 steudten
417 * Add changes to be a real daemon just for unix os.
418 * (change cwd to /, detach from controlling tty, set
419 * process group and session leader to the own process.
421 * Add some fatal-error log message for failed malloc().
422 * Add '-d' if compiled with 'configure --with-debug' to
423 * enable debug output.
425 * Revision 1.52 2001/10/26 20:11:20 jongfoster
426 * Fixing type mismatch
428 * Revision 1.51 2001/10/26 17:38:28 oes
431 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
432 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
433 * threads to call select() simultaneously. So, it's time to do a real, live,
434 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
435 * (native). Both versions will work, but using __OS2__ offers multi-threading.
437 * Revision 1.49 2001/10/23 21:41:35 jongfoster
438 * Added call to initialize the (statically-allocated of course)
439 * "out of memory" CGI response.
441 * Revision 1.48 2001/10/10 19:56:46 jongfoster
442 * Moving some code that wasn't cookie-related out of an #ifdef
445 * Revision 1.47 2001/10/10 16:44:36 oes
446 * Added CONNECT destination port limitation check
448 * Revision 1.46 2001/10/08 15:17:41 oes
449 * Re-enabled SSL forwarding
451 * Revision 1.45 2001/10/07 15:42:11 oes
452 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
454 * Moved downgrading of the HTTP version from parse_http_request to
455 * chat(), since we can't decide if it is necessary before we have
456 * determined the actions for the URL. The HTTP command is now
457 * *always* re-built so the repairs need no longer be special-cased.
459 * filter_popups now gets a csp pointer so it can raise the new
460 * CSP_FLAG_MODIFIED flag.
464 * Added configurable size limit for the IOB. If the IOB grows so
465 * large that the next read would exceed the limit, the header
466 * is generated, and the header & unfiltered buffer are flushed
467 * to the client. Chat then continues in non-buffering,
468 * non-filtering body mode.
470 * Revision 1.44 2001/10/02 18:13:57 oes
473 * Revision 1.43 2001/10/02 15:32:13 oes
474 * Moved generation of hdr
476 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
477 * Cleaning up 2 compiler warnings on OS/2.
479 * Revision 1.41 2001/09/16 17:05:14 jongfoster
480 * Removing unused #include showarg.h
482 * Revision 1.40 2001/09/16 15:41:45 jongfoster
483 * Fixing signed/unsigned comparison warning.
485 * Revision 1.39 2001/09/16 13:21:27 jongfoster
486 * Changes to use new list functions.
488 * Revision 1.38 2001/09/16 13:01:46 jongfoster
489 * Removing redundant function call that zeroed zalloc()'d memory.
491 * Revision 1.37 2001/09/10 11:12:24 oes
492 * Deleted unused variable
494 * Revision 1.36 2001/09/10 10:56:15 oes
495 * Silenced compiler warnings
497 * Revision 1.35 2001/07/31 14:44:22 oes
498 * Deleted unused size parameter from filter_popups()
500 * Revision 1.34 2001/07/30 22:08:36 jongfoster
501 * Tidying up #defines:
502 * - All feature #defines are now of the form FEATURE_xxx
503 * - Permanently turned off WIN_GUI_EDIT
504 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
506 * Revision 1.33 2001/07/29 19:32:00 jongfoster
507 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
509 * Revision 1.32 2001/07/29 18:47:05 jongfoster
510 * Adding missing #include "loadcfg.h"
512 * Revision 1.31 2001/07/29 12:17:48 oes
513 * Applied pthread fix by Paul Lieverse
515 * Revision 1.30 2001/07/25 22:57:13 jongfoster
516 * __BEOS__ no longer overrides FEATURE_PTHREAD.
517 * This is because FEATURE_PTHREAD will soon be widely used, so I
518 * want to keep it simple.
520 * Revision 1.29 2001/07/24 12:47:06 oes
521 * Applied BeOS support update by Eugenia
523 * Revision 1.28 2001/07/23 13:26:12 oes
524 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
526 * Revision 1.27 2001/07/19 19:09:47 haroon
527 * - Added code to take care of the situation where while processing the first
528 * server response (which includes the server header), after finding the end
529 * of the headers we were not looking past the end of the headers for
530 * content modification. I enabled it for filter_popups.
531 * Someone else should look to see if other similar operations should be
532 * done to the discarded portion of the buffer.
534 * Note 2001/07/20: No, the other content modification mechanisms will process
535 * the whole iob later anyway. --oes
537 * Revision 1.26 2001/07/18 12:31:36 oes
540 * Revision 1.25 2001/07/15 19:43:49 jongfoster
541 * Supports POSIX threads.
542 * Also removed some unused #includes.
544 * Revision 1.24 2001/07/13 14:00:40 oes
545 * - Generic content modification scheme:
546 * Each feature has its own applicability flag that is set
547 * from csp->action->flags.
548 * Replaced the "filtering" int flag , by a function pointer
549 * "content_filter" to the function that will do the content
550 * modification. If it is != NULL, the document will be buffered
551 * and processed through *content_filter, which must set
552 * csp->content_length and return a modified copy of the body
553 * or return NULL (on failiure).
554 * - Changed csp->is_text to the more generic bitmap csp->content_type
555 * which can currently take the valued CT_TEXT or CT_GIF
557 * - Removed all #ifdef PCRS
559 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
560 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
561 * the `block_acl' call. This prevents a compilation error when the user
562 * does not wish to use the "ACL" feature.
564 * Revision 1.22 2001/06/29 21:45:41 oes
565 * Indentation, CRLF->LF, Tab-> Space
567 * Revision 1.21 2001/06/29 13:29:36 oes
568 * - Cleaned up, improved comments
569 * - Unified all possible interceptors (CGI,
570 * block, trust, fast_redirect) in one
571 * place, with one (CGI) answer generation
572 * mechansim. Much clearer now.
573 * - Removed the GIF image generation, which
574 * is now done in filters.c:block_url()
575 * - Made error conditions like domain lookup
576 * failiure or (various) problems while talking
577 * to the server use cgi.c:error_response()
578 * instead of generating HTML/HTTP in chat() (yuck!)
579 * - Removed logentry from cancelled commit
581 * Revision 1.20 2001/06/09 10:55:28 jongfoster
582 * Changing BUFSIZ ==> BUFFER_SIZE
584 * Revision 1.19 2001/06/07 23:12:52 jongfoster
585 * Replacing function pointer in struct gateway with a directly
586 * called function forwarded_connect().
587 * Replacing struct gateway with struct forward_spec
589 * Revision 1.18 2001/06/03 19:12:16 oes
590 * introduced new cgi handling
592 * Revision 1.17 2001/06/01 20:07:23 jongfoster
593 * Now uses action +image-blocker{} rather than config->tinygif
595 * Revision 1.16 2001/06/01 18:49:17 jongfoster
596 * Replaced "list_share" with "list" - the tiny memory gain was not
597 * worth the extra complexity.
599 * Revision 1.15 2001/05/31 21:24:47 jongfoster
600 * Changed "permission" to "action" throughout.
601 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
602 * Moved vanilla wafer check into chat(), since we must now
603 * decide whether or not to add it based on the URL.
605 * Revision 1.14 2001/05/29 20:14:01 joergs
606 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
609 * Revision 1.13 2001/05/29 09:50:24 jongfoster
610 * Unified blocklist/imagelist/permissionslist.
611 * File format is still under discussion, but the internal changes
614 * Also modified interceptor behaviour:
615 * - We now intercept all URLs beginning with one of the following
616 * prefixes (and *only* these prefixes):
618 * * http://ijbswa.sf.net/config/
619 * * http://ijbswa.sourceforge.net/config/
620 * - New interceptors "home page" - go to http://i.j.b/ to see it.
621 * - Internal changes so that intercepted and fast redirect pages
622 * are not replaced with an image.
623 * - Interceptors now have the option to send a binary page direct
624 * to the client. (i.e. ijb-send-banner uses this)
625 * - Implemented show-url-info interceptor. (Which is why I needed
626 * the above interceptors changes - a typical URL is
627 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
628 * The previous mechanism would not have intercepted that, and
629 * if it had been intercepted then it then it would have replaced
632 * Revision 1.12 2001/05/27 22:17:04 oes
634 * - re_process_buffer no longer writes the modified buffer
635 * to the client, which was very ugly. It now returns the
636 * buffer, which it is then written by chat.
638 * - content_length now adjusts the Content-Length: header
639 * for modified documents rather than crunch()ing it.
640 * (Length info in csp->content_length, which is 0 for
641 * unmodified documents)
643 * - For this to work, sed() is called twice when filtering.
645 * Revision 1.11 2001/05/26 17:27:53 jongfoster
646 * Added support for CLF and fixed LOG_LEVEL_LOG.
647 * Also did CRLF->LF fix of my previous patch.
649 * Revision 1.10 2001/05/26 15:26:15 jongfoster
650 * ACL feature now provides more security by immediately dropping
651 * connections from untrusted hosts.
653 * Revision 1.9 2001/05/26 00:28:36 jongfoster
654 * Automatic reloading of config file.
655 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
656 * Most of the global variables have been moved to a new
657 * struct configuration_spec, accessed through csp->config->globalname
658 * Most of the globals remaining are used by the Win32 GUI.
660 * Revision 1.8 2001/05/25 22:43:18 jongfoster
661 * Fixing minor memory leak and buffer overflow.
663 * Revision 1.7 2001/05/25 22:34:30 jongfoster
666 * Revision 1.6 2001/05/23 00:13:58 joergs
667 * AmigaOS support fixed.
669 * Revision 1.5 2001/05/22 18:46:04 oes
671 * - Enabled filtering banners by size rather than URL
672 * by adding patterns that replace all standard banner
673 * sizes with the "Junkbuster" gif to the re_filterfile
675 * - Enabled filtering WebBugs by providing a pattern
676 * which kills all 1x1 images
678 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
679 * which is selected by the (nonstandard and therefore
680 * capital) letter 'U' in the option string.
681 * It causes the quantifiers to be ungreedy by default.
682 * Appending a ? turns back to greedy (!).
684 * - Added a new interceptor ijb-send-banner, which
685 * sends back the "Junkbuster" gif. Without imagelist or
686 * MSIE detection support, or if tinygif = 1, or the
687 * URL isn't recognized as an imageurl, a lame HTML
688 * explanation is sent instead.
690 * - Added new feature, which permits blocking remote
691 * script redirects and firing back a local redirect
693 * The feature is conditionally compiled, i.e. it
694 * can be disabled with --disable-fast-redirects,
695 * plus it must be activated by a "fast-redirects"
696 * line in the config file, has its own log level
697 * and of course wants to be displayed by show-proxy-args
698 * Note: Boy, all the #ifdefs in 1001 locations and
699 * all the fumbling with configure.in and acconfig.h
700 * were *way* more work than the feature itself :-(
702 * - Because a generic redirect template was needed for
703 * this, tinygif = 3 now uses the same.
705 * - Moved GIFs, and other static HTTP response templates
710 * - Removed some >400 CRs again (Jon, you really worked
713 * Revision 1.4 2001/05/21 19:34:01 jongfoster
714 * Made failure to bind() a fatal error.
716 * Revision 1.3 2001/05/20 01:21:20 jongfoster
717 * Version 2.9.4 checkin.
718 * - Merged popupfile and cookiefile, and added control over PCRS
719 * filtering, in new "permissionsfile".
720 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
721 * file error you now get a message box (in the Win32 GUI) rather
722 * than the program exiting with no explanation.
723 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
725 * - Removed tabs from "config"
726 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
727 * - Bumped up version number.
729 * Revision 1.2 2001/05/17 22:34:44 oes
730 * - Added hint on GIF char array generation to jcc.c
731 * - Cleaned CRLF's from the sources and related files
732 * - Repaired logging for REF and FRC
734 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
735 * Initial import of version 2.9.3 source tree
738 *********************************************************************/
744 #include <sys/types.h>
752 # ifndef FEATURE_PTHREAD
756 # include <windows.h>
757 # include <process.h>
758 # endif /* ndef FEATURE_PTHREAD */
761 # ifndef _WIN_CONSOLE
763 # endif /* ndef _WIN_CONSOLE */
764 # include "w32svrapi.h"
766 #else /* ifndef _WIN32 */
768 # if !defined (__OS2__)
770 # include <sys/wait.h>
771 # endif /* ndef __OS2__ */
772 # include <sys/time.h>
773 # include <sys/stat.h>
774 # include <sys/ioctl.h>
777 #include <sys/termios.h>
788 # include <socket.h> /* BeOS has select() for sockets only. */
789 # include <OS.h> /* declarations for threads and stuff. */
792 # if defined(__EMX__) || defined(__OS2__)
793 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
798 #define bzero(B,N) memset(B,0x00,n)
813 #include "killpopup.h"
814 #include "miscutil.h"
816 #include "jbsockets.h"
821 #include "urlmatch.h"
823 const char jcc_h_rcs[] = JCC_H_VERSION;
824 const char project_h_rcs[] = PROJECT_H_VERSION;
827 struct client_state clients[1];
828 struct file_list files[1];
830 #ifdef FEATURE_STATISTICS
831 int urls_read = 0; /* total nr of urls read inc rejected */
832 int urls_rejected = 0; /* total nr of urls rejected */
833 #endif /* def FEATURE_STATISTICS */
835 #ifdef FEATURE_GRACEFUL_TERMINATION
839 static void listen_loop(void);
840 static void chat(struct client_state *csp);
842 void serve(struct client_state *csp);
843 #else /* ifndef AMIGA */
844 static void serve(struct client_state *csp);
845 #endif /* def AMIGA */
848 static int32 server_thread(void *data);
849 #endif /* def __BEOS__ */
852 #define sleep(N) Sleep(((N) * 1000))
856 #define sleep(N) DosSleep(((N) * 100))
859 #ifdef FEATURE_PTHREAD
860 pthread_mutex_t log_mutex;
861 pthread_mutex_t log_init_mutex;
863 #ifndef HAVE_GMTIME_R
864 pthread_mutex_t gmtime_mutex;
865 #endif /* ndef HAVE_GMTIME_R */
867 #ifndef HAVE_LOCALTIME_R
868 pthread_mutex_t localtime_mutex;
869 #endif /* ndef HAVE_GMTIME_R */
871 #ifndef HAVE_GETHOSTBYADDR_R
872 pthread_mutex_t gethostbyaddr_mutex;
873 #endif /* ndef HAVE_GETHOSTBYADDR_R */
875 #ifndef HAVE_GETHOSTBYNAME_R
876 pthread_mutex_t gethostbyname_mutex;
877 #endif /* ndef HAVE_GETHOSTBYNAME_R */
880 pthread_mutex_t rand_mutex;
881 #endif /* ndef HAVE_RANDOM */
883 #endif /* FEATURE_PTHREAD */
885 #if defined(unix) || defined(__EMX__)
886 const char *basedir = NULL;
887 const char *pidfile = NULL;
888 int received_hup_signal = 0;
889 #endif /* defined unix */
891 /* The vanilla wafer. */
892 static const char VANILLA_WAFER[] =
893 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
894 "Do_not_send_me_any_copyrighted_information_other_than_the_"
895 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
896 "In_particular_do_not_send_me_any_cookies_that_"
897 "are_subject_to_a_claim_of_copyright_by_anybody._"
898 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
899 "(copyright_or_otherwise)_applying_to_any_cookie._";
901 /* HTTP snipplets. */
902 const char CSUCCEED[] =
903 "HTTP/1.0 200 Connection established\n"
904 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
906 const char CHEADER[] =
907 "HTTP/1.0 400 Invalid header received from browser\r\n"
908 "Connection: close\r\n\r\n"
909 "Invalid header received from browser.";
911 const char CFORBIDDEN[] =
912 "HTTP/1.0 403 Connection not allowable\r\n"
913 "Proxy-Agent: Privoxy " VERSION "\r\n"
914 "X-Hint: If you read this message interactively, then you know why this happens ,-)\r\n"
915 "Connection: close\r\n\r\n";
917 const char FTP_RESPONSE[] =
918 "HTTP/1.0 400 Invalid request received from browser\r\n"
919 "Connection: close\r\n\r\n"
920 "Invalid request. Privoxy doesn't support FTP.\r\n";
922 const char GOPHER_RESPONSE[] =
923 "HTTP/1.0 400 Invalid request received from browser\r\n"
924 "Connection: close\r\n\r\n"
925 "Invalid request. Privoxy doesn't support gopher.\r\n";
927 /* XXX: should be a template */
928 const char MISSING_DESTINATION_RESPONSE[] =
929 "HTTP/1.0 400 Bad request received from browser\r\n"
930 "Proxy-Agent: Privoxy " VERSION "\r\n"
931 "Connection: close\r\n\r\n"
932 "Bad request. Privoxy was unable to extract the destination.\r\n";
934 /* XXX: should be a template */
935 const char NO_SERVER_DATA_RESPONSE[] =
936 "HTTP/1.0 502 Server or forwarder response empty\r\n"
937 "Proxy-Agent: Privoxy " VERSION "\r\n"
938 "Connection: close\r\n\r\n"
939 "Empty server or forwarder response.\r\n"
940 "The connection was closed without sending any data.\r\n";
942 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
943 /*********************************************************************
945 * Function : sig_handler
947 * Description : Signal handler for different signals.
948 * Exit gracefully on TERM and INT
949 * or set a flag that will cause the errlog
950 * to be reopened by the main thread on HUP.
953 * 1 : the_signal = the signal cause this function to call
957 *********************************************************************/
958 static void sig_handler(int the_signal)
964 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
975 received_hup_signal = 1;
980 * We shouldn't be here, unless we catch signals
981 * in main() that we can't handle here!
983 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
991 /*********************************************************************
995 * Description : Once a connection to the client has been accepted,
996 * this function is called (via serve()) to handle the
997 * main business of the communication. When this
998 * function returns, the caller must close the client
1002 * 1 : csp = Current client state (buffers, headers, etc...)
1004 * Returns : On success, the number of bytes written are returned (zero
1005 * indicates nothing was written). On error, -1 is returned,
1006 * and errno is set appropriately. If count is zero and the
1007 * file descriptor refers to a regular file, 0 will be
1008 * returned without causing any other effect. For a special
1009 * file, the results are not portable.
1011 *********************************************************************/
1012 static void chat(struct client_state *csp)
1015 * This next lines are a little ugly, but they simplifies the if statements
1016 * below. Basically if TOGGLE, then we want the if to test if the
1017 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
1018 * then we want the if to test for CSP_FLAG_FORCED , else we don't
1020 #ifdef FEATURE_TOGGLE
1021 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
1022 #else /* ifndef FEATURE_TOGGLE */
1023 # define IS_TOGGLED_ON_AND
1024 #endif /* ndef FEATURE_TOGGLE */
1025 #ifdef FEATURE_FORCE_LOAD
1026 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
1027 #else /* ifndef FEATURE_FORCE_LOAD */
1028 # define IS_NOT_FORCED_AND
1029 #endif /* def FEATURE_FORCE_LOAD */
1031 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
1033 char buf[BUFFER_SIZE];
1041 int ms_iis5_hack = 0;
1042 size_t byte_count = 0;
1043 int forwarded_connect_retries = 0;
1044 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
1045 const struct forward_spec * fwd;
1046 struct http_request *http;
1047 int len; /* for buffer sizes (and negative error codes) */
1048 #ifdef FEATURE_KILL_POPUPS
1049 int block_popups; /* bool, 1==will block popups */
1050 int block_popups_now = 0; /* bool, 1==currently blocking popups */
1051 #endif /* def FEATURE_KILL_POPUPS */
1053 int pcrs_filter; /* bool, 1==will filter through pcrs */
1054 int gif_deanimate; /* bool, 1==will deanimate gifs */
1055 int jpeg_inspect; /* bool, 1==will inspect jpegs */
1057 /* Function that does the content filtering for the current request */
1058 char *(*content_filter)() = NULL;
1060 /* Skeleton for HTTP response, if we should intercept the request */
1061 struct http_response *rsp;
1063 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1064 struct list header_list;
1065 struct list *headers = &header_list;
1070 * Read the client's request. Note that since we're not using select() we
1071 * could get blocked here if a client connected, then didn't say anything!
1076 len = read_socket(csp->cfd, buf, sizeof(buf));
1078 if (len <= 0) break; /* error! */
1081 * If there is no memory left for buffering the
1082 * request, there is nothing we can do but hang up
1084 if (add_to_iob(csp, buf, len))
1089 req = get_header(csp);
1093 break; /* no HTTP request! */
1098 continue; /* more to come! */
1102 * If it's a FTP or gopher request, we don't support it.
1104 * These checks are better than nothing, but they might
1105 * not work in all configurations and some clients might
1106 * have problems digesting the answer.
1108 * They should, however, never cause more problems than
1109 * Privoxy's old behaviour (returning the misleading HTML error message:
1110 * "Could not resolve http://(ftp|gopher)://example.org").
1112 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1114 if (!strncmpic(req, "GET ftp://", 10))
1116 strcpy(buf, FTP_RESPONSE);
1117 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as FTP proxy: %s",
1118 csp->ip_addr_str, req);
1122 strcpy(buf, GOPHER_RESPONSE);
1123 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as gopher proxy: %s",
1124 csp->ip_addr_str, req);
1126 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1128 write_socket(csp->cfd, buf, strlen(buf));
1129 free_http_request(http);
1133 #ifdef FEATURE_FORCE_LOAD
1134 /* If this request contains the FORCE_PREFIX,
1135 * better get rid of it now and set the force flag --oes
1138 if (strstr(req, FORCE_PREFIX))
1140 strclean(req, FORCE_PREFIX);
1141 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
1142 csp->flags |= CSP_FLAG_FORCED;
1145 #endif /* def FEATURE_FORCE_LOAD */
1147 switch( parse_http_request(req, http, csp) )
1150 log_error(LOG_LEVEL_ERROR, "Out of memory while parsing request.");
1153 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", req);
1161 if (http->cmd == NULL)
1163 strcpy(buf, CHEADER);
1164 write_socket(csp->cfd, buf, strlen(buf));
1166 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
1168 free_http_request(http);
1172 /* grab the rest of the client's headers */
1176 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1178 len = read_socket(csp->cfd, buf, sizeof(buf));
1181 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1186 * If there is no memory left for buffering the
1187 * request, there is nothing we can do but hang up
1189 if (add_to_iob(csp, buf, len))
1196 if (p == NULL) break;
1203 if (http->host == NULL)
1206 * Intercepted or invalid request without domain
1207 * inside the request line. Try to get it another way,
1208 * unless accept-intercepted-requests is disabled.
1210 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1212 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1213 " Privoxy isn't configured to accept intercepted requests.",
1214 csp->ip_addr_str, http->cmd);
1215 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, http->cmd);
1217 strcpy(buf, CHEADER);
1218 write_socket(csp->cfd, buf, strlen(buf));
1219 free_http_request(http);
1220 destroy_list(headers);
1223 else if (JB_ERR_OK == get_destination_from_headers(headers, http))
1225 /* Split the domain we just got for pattern matching */
1226 init_domain_components(http);
1230 /* We can't work without destination. Go spread the news.*/
1232 req = list_to_text(headers);
1234 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, http->cmd);
1235 log_error(LOG_LEVEL_ERROR,
1236 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1237 csp->ip_addr_str, http->cmd, req);
1240 strcpy(buf, MISSING_DESTINATION_RESPONSE);
1241 write_socket(csp->cfd, buf, strlen(buf));
1242 free_http_request(http);
1243 destroy_list(headers);
1247 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1248 * to get the destination IP address, use it as host directly
1249 * or do a reverse DNS lookup first.
1253 /* decide how to route the HTTP request */
1255 if ((fwd = forward_url(http, csp)) == NULL)
1257 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1258 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1261 /* build the http request to send to the server
1262 * we have to do one of the following:
1264 * create = use the original HTTP request to create a new
1265 * HTTP request that has either the path component
1266 * without the http://domainspec (w/path) or the
1267 * full orininal URL (w/url)
1268 * Note that the path and/or the HTTP version may
1269 * have been altered by now.
1271 * connect = Open a socket to the host:port of the server
1272 * and short-circuit server and client socket.
1274 * pass = Pass the request unchanged if forwarding a CONNECT
1275 * request to a parent proxy. Note that we'll be sending
1276 * the CFAIL message ourselves if connecting to the parent
1277 * fails, but we won't send a CSUCCEED message if it works,
1278 * since that would result in a double message (ours and the
1279 * parent's). After sending the request to the parent, we simply
1282 * here's the matrix:
1285 * +--------+--------+
1287 * 0 | create | connect|
1289 * Forwarding +--------+--------+
1291 * 1 | create | pass |
1293 * +--------+--------+
1298 * Determine the actions for this URL
1300 #ifdef FEATURE_TOGGLE
1301 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1303 /* Most compatible set of actions (i.e. none) */
1304 init_current_action(csp->action);
1307 #endif /* ndef FEATURE_TOGGLE */
1309 url_actions(http, csp);
1314 * Check if a CONNECT request is allowable:
1315 * In the absence of a +limit-connect action, allow only port 443.
1316 * If there is an action, allow whatever matches the specificaton.
1320 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
1321 || (csp->action->flags & ACTION_LIMIT_CONNECT
1322 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
1324 if (csp->action->flags & ACTION_TREAT_FORBIDDEN_CONNECTS_LIKE_BLOCKS)
1326 /* The response will violate the specs, but makes unblocking easier. */
1327 log_error(LOG_LEVEL_ERROR, "Marking suspicious CONNECT request from %s for blocking.",
1329 csp->action->flags |= ACTION_BLOCK;
1334 strcpy(buf, CFORBIDDEN);
1335 write_socket(csp->cfd, buf, strlen(buf));
1336 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
1337 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
1345 * Downgrade http version from 1.1 to 1.0 if +downgrade
1348 if ( (http->ssl == 0)
1349 && (!strcmpic(http->ver, "HTTP/1.1"))
1350 && (csp->action->flags & ACTION_DOWNGRADE))
1353 http->ver = strdup("HTTP/1.0");
1355 if (http->ver == NULL)
1357 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1362 * Save a copy of the original request for logging
1364 http->ocmd = strdup(http->cmd);
1366 if (http->ocmd == NULL)
1368 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
1372 * (Re)build the HTTP request for non-SSL requests.
1373 * If forwarding, use the whole URL, else, use only the path.
1379 http->cmd = strdup(http->gpc);
1380 string_append(&http->cmd, " ");
1382 if (fwd->forward_host)
1384 string_append(&http->cmd, http->url);
1388 string_append(&http->cmd, http->path);
1390 string_append(&http->cmd, " ");
1391 string_append(&http->cmd, http->ver);
1393 if (http->cmd == NULL)
1395 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1397 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", http->cmd);
1399 enlist(csp->headers, http->cmd);
1401 /* Append the previously read headers */
1402 list_append_list_unique(csp->headers, headers);
1403 destroy_list(headers);
1406 * If the user has not supplied any wafers, and the user has not
1407 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1409 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1410 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1412 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1416 #ifdef FEATURE_KILL_POPUPS
1417 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
1418 #endif /* def FEATURE_KILL_POPUPS */
1420 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
1421 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
1423 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
1425 jpeg_inspect = ((csp->action->flags & ACTION_JPEG_INSPECT) != 0);
1428 * We have a request. Now, check to see if we need to
1429 * intercept it, i.e. If ..
1433 /* We may not forward the request by rfc2616 sect 14.31 */
1434 (NULL != (rsp = direct_response(csp)))
1436 /* or we are enabled and... */
1437 || (IS_ENABLED_AND (
1439 /* ..the request was blocked */
1440 ( NULL != (rsp = block_url(csp)))
1442 /* ..or untrusted */
1443 #ifdef FEATURE_TRUST
1444 || ( NULL != (rsp = trust_url(csp)))
1445 #endif /* def FEATURE_TRUST */
1447 /* ..or a redirect kicked in */
1448 || ( NULL != (rsp = redirect_url(csp)))
1452 * .. or a CGI call was detected and answered.
1454 * This check comes last to give the user the power
1455 * to deny acces to some (or all) of the cgi pages.
1457 || (NULL != (rsp = dispatch_cgi(csp)))
1461 /* Write the answer to the client */
1462 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1463 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1465 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1468 #ifdef FEATURE_STATISTICS
1469 /* Count as a rejected request */
1470 csp->flags |= CSP_FLAG_REJECTED;
1471 #endif /* def FEATURE_STATISTICS */
1473 /* Log (FIXME: All intercept reasons appear as "crunch" with Status 200) */
1474 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
1475 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
1477 /* Clean up and return */
1478 free_http_response(rsp);
1482 hdr = sed(client_patterns, add_client_headers, csp);
1485 /* FIXME Should handle error properly */
1486 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1489 list_remove_all(csp->headers);
1491 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1493 if (fwd->forward_host)
1495 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1496 fwd->forward_host, fwd->forward_port, http->hostport);
1500 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1503 /* here we connect to the server, gateway, or the forwarder */
1505 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
1506 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
1508 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
1509 forwarded_connect_retries, http->hostport);
1512 if (csp->sfd == JB_INVALID_SOCKET)
1514 if (fwd->type != SOCKS_NONE)
1517 rsp = error_response(csp, "forwarding-failed", errno);
1519 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1520 csp->ip_addr_str, http->ocmd);
1522 else if (errno == EINVAL)
1524 rsp = error_response(csp, "no-such-domain", errno);
1526 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
1527 csp->ip_addr_str, http->ocmd);
1531 rsp = error_response(csp, "connect-failed", errno);
1533 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1536 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1537 csp->ip_addr_str, http->ocmd);
1541 /* Write the answer to the client */
1544 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1545 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1547 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1551 free_http_response(rsp);
1556 if (fwd->forward_host || (http->ssl == 0))
1558 /* write the client's (modified) header to the server
1559 * (along with anything else that may be in the buffer)
1562 if (write_socket(csp->sfd, hdr, strlen(hdr))
1563 || (flush_socket(csp->sfd, csp) < 0))
1565 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1568 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1569 csp->ip_addr_str, http->ocmd);
1571 rsp = error_response(csp, "connect-failed", errno);
1575 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1576 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1578 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1582 free_http_response(rsp);
1590 * We're running an SSL tunnel and we're not forwarding,
1591 * so just send the "connect succeeded" message to the
1592 * client, flush the rest, and get out of the way.
1594 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1595 csp->ip_addr_str, http->ocmd);
1597 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
1605 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
1607 /* we're finished with the client's header */
1610 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1612 /* pass data between the client and server
1613 * until one or the other shuts down the connection.
1622 * FD_ZERO here seems to point to an errant macro which crashes.
1623 * So do this by hand for now...
1625 memset(&rfds,0x00,sizeof(fd_set));
1629 FD_SET(csp->cfd, &rfds);
1630 FD_SET(csp->sfd, &rfds);
1632 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
1636 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1640 /* this is the body of the browser's request
1641 * just read it and write it.
1644 if (FD_ISSET(csp->cfd, &rfds))
1646 len = read_socket(csp->cfd, buf, sizeof(buf));
1650 break; /* "game over, man" */
1653 if (write_socket(csp->sfd, buf, (size_t)len))
1655 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1662 * The server wants to talk. It could be the header or the body.
1663 * If `hdr' is null, then it's the header otherwise it's the body.
1664 * FIXME: Does `hdr' really mean `host'? No.
1668 if (FD_ISSET(csp->sfd, &rfds))
1671 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1675 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1677 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1678 csp->ip_addr_str, http->ocmd);
1680 rsp = error_response(csp, "connect-failed", errno);
1684 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1685 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1687 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1691 free_http_response(rsp);
1695 /* Add a trailing zero. This lets filter_popups
1696 * use string operations.
1700 #ifdef FEATURE_KILL_POPUPS
1701 /* Filter the popups on this read. */
1702 if (block_popups_now)
1704 filter_popups(buf, csp);
1706 #endif /* def FEATURE_KILL_POPUPS */
1708 /* Normally, this would indicate that we've read
1709 * as much as the server has sent us and we can
1710 * close the client connection. However, Microsoft
1711 * in its wisdom has released IIS/5 with a bug that
1712 * prevents it from sending the trailing \r\n in
1713 * a 302 redirect header (and possibly other headers).
1714 * To work around this if we've haven't parsed
1715 * a full header we'll append a trailing \r\n
1716 * and see if this now generates a valid one.
1718 * This hack shouldn't have any impacts. If we've
1719 * already transmitted the header or if this is a
1720 * SSL connection, then we won't bother with this
1721 * hack. So we only work on partially received
1722 * headers. If we append a \r\n and this still
1723 * doesn't generate a valid header, then we won't
1724 * transmit anything to the client.
1729 if (server_body || http->ssl)
1732 * If we have been buffering up the document,
1733 * now is the time to apply content modification
1734 * and send the result to the client.
1739 * If the content filter fails, use the original
1740 * buffer and length.
1741 * (see p != NULL ? p : csp->iob->cur below)
1743 if (NULL == (p = (*content_filter)(csp)))
1745 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
1748 hdr = sed(server_patterns_light, NULL, csp);
1752 /* FIXME Should handle error properly */
1753 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1756 if (write_socket(csp->cfd, hdr, strlen(hdr))
1757 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
1759 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1769 break; /* "game over, man" */
1773 * This is NOT the body, so
1774 * Let's pretend the server just sent us a blank line.
1776 snprintf(buf, sizeof(buf), "\r\n");
1777 len = (int)strlen(buf);
1780 * Now, let the normal header parsing algorithm below do its
1781 * job. If it fails, we'll exit instead of continuing.
1788 * If this is an SSL connection or we're in the body
1789 * of the server document, just write it to the client,
1790 * unless we need to buffer the body for later content-filtering
1793 if (server_body || http->ssl)
1798 * If there is no memory left for buffering the content, or the buffer limit
1799 * has been reached, switch to non-filtering mode, i.e. make & write the
1800 * header, flush the iob and buf, and get out of the way.
1802 if (add_to_iob(csp, buf, len))
1807 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
1809 hdr = sed(server_patterns, add_server_headers, csp);
1813 * Memory is too tight to even generate the header.
1814 * Send our static "Out-of-memory" page.
1816 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
1817 rsp = cgi_error_memory();
1819 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1820 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1822 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1827 hdrlen = strlen(hdr);
1829 if (write_socket(csp->cfd, hdr, hdrlen)
1830 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
1831 || (write_socket(csp->cfd, buf, (size_t)len)))
1833 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
1839 byte_count += hdrlen + (size_t)(flushed + len);
1841 content_filter = NULL;
1848 if (write_socket(csp->cfd, buf, (size_t)len))
1850 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
1854 byte_count += (size_t)len;
1859 /* we're still looking for the end of the
1860 * server's header ... (does that make header
1861 * parsing an "out of body experience" ?
1865 * buffer up the data we just read. If that fails,
1866 * there's little we can do but send our static
1867 * out-of-memory page.
1869 if (add_to_iob(csp, buf, len))
1871 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
1872 rsp = cgi_error_memory();
1874 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1875 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1877 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1882 /* get header lines from the iob */
1884 while ((p = get_header(csp)) != NULL)
1888 /* see following note */
1891 enlist(csp->headers, p);
1895 /* NOTE: there are no "empty" headers so
1896 * if the pointer `p' is not NULL we must
1897 * assume that we reached the end of the
1898 * buffer before we hit the end of the header.
1905 /* Well, we tried our MS IIS/5
1906 * hack and it didn't work.
1907 * The header is incomplete
1908 * and there isn't anything
1909 * we can do about it.
1915 /* Since we have to wait for
1916 * more from the server before
1917 * we can parse the headers
1918 * we just continue here.
1924 /* Did we actually get anything? */
1925 if (NULL == csp->headers->first)
1927 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
1928 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
1929 strcpy(buf, NO_SERVER_DATA_RESPONSE);
1930 write_socket(csp->cfd, buf, strlen(buf));
1931 free_http_request(http);
1935 /* we have now received the entire header.
1936 * filter it and send the result to the client
1939 hdr = sed(server_patterns, add_server_headers, csp);
1942 /* FIXME Should handle error properly */
1943 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1946 #ifdef FEATURE_KILL_POPUPS
1947 /* Start blocking popups if appropriate. */
1949 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1950 !http->ssl && /* We talk plaintext */
1951 block_popups) /* Policy allows */
1953 block_popups_now = 1;
1955 * Filter the part of the body that came in the same read
1956 * as the last headers:
1958 filter_popups(csp->iob->cur, csp);
1961 #endif /* def FEATURE_KILL_POPUPS */
1963 /* Buffer and pcrs filter this if appropriate. */
1965 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1966 !http->ssl && /* We talk plaintext */
1967 pcrs_filter) /* Policy allows */
1969 content_filter = pcrs_filter_response;
1972 /* Buffer and gif_deanimate this if appropriate. */
1974 if ((csp->content_type & CT_GIF) && /* It's an image/gif MIME-Type */
1975 !http->ssl && /* We talk plaintext */
1976 gif_deanimate) /* Policy allows */
1978 content_filter = gif_deanimate_response;
1981 /* Buffer and jpg_inspect this if appropriate. */
1983 if ((csp->content_type & CT_JPEG) && /* It's an image/jpeg MIME-Type */
1984 !http->ssl && /* We talk plaintext */
1985 jpeg_inspect) /* Policy allows */
1987 content_filter = jpeg_inspect_response;
1991 * Only write if we're not buffering for content modification
1993 if (!content_filter)
1995 /* write the server's (modified) header to
1996 * the client (along with anything else that
1997 * may be in the buffer)
2000 if (write_socket(csp->cfd, hdr, strlen(hdr))
2001 || ((len = flush_socket(csp->cfd, csp)) < 0))
2003 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
2005 /* the write failed, so don't bother
2006 * mentioning it to the client...
2007 * it probably can't hear us anyway.
2013 byte_count += (size_t)len;
2016 /* we're finished with the server's header */
2021 /* If this was a MS IIS/5 hack then it means
2022 * the server has already closed the
2023 * connection. Nothing more to read. Time
2034 return; /* huh? we should never get here */
2037 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
2038 csp->ip_addr_str, http->ocmd, byte_count);
2042 /*********************************************************************
2046 * Description : This is little more than chat. We only "serve" to
2047 * to close any socket that chat may have opened.
2050 * 1 : csp = Current client state (buffers, headers, etc...)
2054 *********************************************************************/
2056 void serve(struct client_state *csp)
2057 #else /* ifndef AMIGA */
2058 static void serve(struct client_state *csp)
2059 #endif /* def AMIGA */
2062 close_socket(csp->cfd);
2064 if (csp->sfd != JB_INVALID_SOCKET)
2066 close_socket(csp->sfd);
2069 csp->flags &= ~CSP_FLAG_ACTIVE;
2075 /*********************************************************************
2077 * Function : server_thread
2079 * Description : We only exist to call `serve' in a threaded environment.
2082 * 1 : data = Current client state (buffers, headers, etc...)
2084 * Returns : Always 0.
2086 *********************************************************************/
2087 static int32 server_thread(void *data)
2089 serve((struct client_state *) data);
2096 /*********************************************************************
2100 * Description : Print usage info & exit.
2102 * Parameters : Pointer to argv[0] for identifying ourselves
2106 *********************************************************************/
2107 void usage(const char *myname)
2109 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
2111 "Usage: %s [--help] [--version] [configfile]\n"
2113 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
2115 "Aborting.\n", myname);
2122 /*********************************************************************
2126 * Description : Load the config file and start the listen loop.
2127 * This function is a lot more *sane* with the `load_config'
2128 * and `listen_loop' functions; although it stills does
2129 * a *little* too much for my taste.
2132 * 1 : argc = Number of parameters (including $0).
2133 * 2 : argv = Array of (char *)'s to the parameters.
2135 * Returns : 1 if : can't open config file, unrecognized directive,
2136 * stats requested in multi-thread mode, can't open the
2137 * log file, can't open the jar file, listen port is invalid,
2138 * any load fails, and can't bind port.
2140 * Else main never returns, the process must be signaled
2141 * to terminate execution. Or, on Windows, use the
2142 * "File", "Exit" menu option.
2144 *********************************************************************/
2146 int real_main(int argc, const char *argv[])
2148 int main(int argc, const char *argv[])
2152 unsigned int random_seed;
2154 struct passwd *pw = NULL;
2155 struct group *grp = NULL;
2164 #if !defined(_WIN32)
2172 * Parse the command line arguments
2174 while (++argc_pos < argc)
2177 /* Check to see if the service must be installed or uninstalled */
2178 if (strncmp(argv[argc_pos], "--install", 9) == 0)
2180 const char *pName = argv[argc_pos] + 9;
2183 exit( (install_service(pName)) ? 0 : 1 );
2185 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
2187 const char *pName = argv[argc_pos] + 11;
2190 exit((uninstall_service(pName)) ? 0 : 1);
2192 else if (strcmp(argv[argc_pos], "--service" ) == 0)
2194 bRunAsService = TRUE;
2195 w32_set_service_cwd();
2196 atexit(w32_service_exit_notify);
2199 #endif /* defined(_WIN32) */
2202 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2204 if (strcmp(argv[argc_pos], "--help") == 0)
2209 else if(strcmp(argv[argc_pos], "--version") == 0)
2211 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
2217 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
2222 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
2224 if (++argc_pos == argc) usage(argv[0]);
2225 pidfile = strdup(argv[argc_pos]);
2228 else if (strcmp(argv[argc_pos], "--user" ) == 0)
2230 if (++argc_pos == argc) usage(argv[argc_pos]);
2232 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
2235 if (NULL == (grp = getgrnam(p)))
2237 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
2241 if (NULL == (pw = getpwnam(argv[argc_pos])))
2243 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
2246 if (p != NULL) *--p = '\0';
2249 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
2254 #endif /* defined(unix) */
2255 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
2257 configfile = argv[argc_pos];
2260 } /* -END- while (more arguments) */
2263 if ( *configfile != '/' )
2265 char *abs_file, cwd[1024];
2267 /* make config-filename absolute here */
2268 if ( !(getcwd(cwd, sizeof(cwd))))
2270 perror("get working dir failed");
2274 if (!(basedir = strdup(cwd))
2275 || (!(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))))
2277 perror("malloc failed");
2280 strcpy( abs_file, basedir );
2281 strcat( abs_file, "/" );
2282 strcat( abs_file, configfile );
2283 configfile = abs_file;
2285 #endif /* defined unix */
2289 clients->next = NULL;
2293 #elif defined(_WIN32)
2297 #ifdef FEATURE_PTHREAD
2299 * Prepare global mutex semaphores
2301 pthread_mutex_init(&log_mutex,0);
2302 pthread_mutex_init(&log_init_mutex,0);
2304 #ifndef HAVE_GMTIME_R
2305 pthread_mutex_init(&gmtime_mutex,0);
2306 #endif /* ndef HAVE_GMTIME_R */
2308 #ifndef HAVE_LOCALTIME_R
2309 pthread_mutex_init(&localtime_mutex,0);
2310 #endif /* ndef HAVE_GMTIME_R */
2312 #ifndef HAVE_GETHOSTBYADDR_R
2313 pthread_mutex_init(&gethostbyaddr_mutex,0);
2314 #endif /* ndef HAVE_GETHOSTBYADDR_R */
2316 #ifndef HAVE_GETHOSTBYNAME_R
2317 pthread_mutex_init(&gethostbyname_mutex,0);
2318 #endif /* ndef HAVE_GETHOSTBYNAME_R */
2321 pthread_mutex_init(&rand_mutex,0);
2322 #endif /* ndef HAVE_RANDOM */
2324 #endif /* FEATURE_PTHREAD */
2326 random_seed = (unsigned int)time(NULL);
2328 srandom(random_seed);
2331 #endif /* ifdef HAVE_RANDOM */
2334 * Unix signal handling
2336 * Catch the abort, interrupt and terminate signals for a graceful exit
2337 * Catch the hangup signal so the errlog can be reopened.
2338 * Ignore the broken pipe signals (FIXME: Why?)
2340 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
2343 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
2344 const int ignored_signals[] = { SIGPIPE, 0 };
2346 for (idx = 0; catched_signals[idx] != 0; idx++)
2348 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
2349 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
2351 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
2352 #endif /* ifdef sun */
2354 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
2358 for (idx = 0; ignored_signals[idx] != 0; idx++)
2360 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
2362 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
2367 #else /* ifdef _WIN32 */
2368 # ifdef _WIN_CONSOLE
2370 * We *are* in a windows console app.
2371 * Print a verbose messages about FAQ's and such
2373 printf("%s", win32_blurb);
2374 # endif /* def _WIN_CONSOLE */
2375 #endif /* def _WIN32 */
2378 /* Initialize the CGI subsystem */
2379 cgi_init_error_messages();
2382 * If runnig on unix and without the --nodaemon
2383 * option, become a daemon. I.e. fork, detach
2384 * from tty and get process group leadership
2397 if ( pid < 0 ) /* error */
2402 else if ( pid != 0 ) /* parent */
2407 * must check for errors
2408 * child died due to missing files aso
2411 wpid = waitpid( pid, &status, WNOHANG );
2420 /* Should be more portable, but not as well tested */
2425 #else /* ndef __FreeBSD__ */
2427 #endif /* ndef __FreeBSD__ */
2428 fd = open("/dev/tty", O_RDONLY);
2431 /* no error check here */
2432 ioctl( fd, TIOCNOTTY,0 );
2436 /* FIXME: should close stderr (fd 2) here too, but the test
2438 * and load config file is done in listen_loop() and puts
2439 * some messages on stderr there.
2446 } /* -END- if (!no_daemon) */
2449 * As soon as we have written the PID file, we can switch
2450 * to the user and group ID indicated by the --user option
2456 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
2458 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
2464 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
2466 if (chroot(pw->pw_dir) < 0)
2468 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
2472 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
2475 if (setuid(pw->pw_uid))
2477 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
2481 char putenv_dummy[64];
2483 strcpy(putenv_dummy, "HOME=/");
2484 if (putenv(putenv_dummy) != 0)
2486 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
2489 snprintf(putenv_dummy, 64, "USER=%s", pw->pw_name);
2490 if (putenv(putenv_dummy) != 0)
2492 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
2498 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
2501 #endif /* defined unix */
2504 /* This will be FALSE unless the command line specified --service
2508 /* Yup, so now we must attempt to establish a connection
2509 * with the service dispatcher. This will only work if this
2510 * process was launched by the service control manager to
2511 * actually run as a service. If this isn't the case, i've
2512 * known it take around 30 seconds or so for the call to return.
2515 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
2516 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
2518 /* Service has run, and at this point is now being stopped, so just return */
2523 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
2525 /* An error occurred. Usually it's because --service was wrongly specified
2526 * and we were unable to connect to the Service Control Dispatcher because
2527 * it wasn't expecting us and is therefore not listening.
2529 * For now, just continue below to call the listen_loop function.
2532 #endif /* def _WIN32 */
2542 /*********************************************************************
2544 * Function : bind_port_helper
2546 * Description : Bind the listen port. Handles logging, and aborts
2550 * 1 : config = Privoxy configuration. Specifies port
2553 * Returns : Port that was opened.
2555 *********************************************************************/
2556 static jb_socket bind_port_helper(struct configuration_spec * config)
2561 if ( (config->haddr != NULL)
2562 && (config->haddr[0] == '1')
2563 && (config->haddr[1] == '2')
2564 && (config->haddr[2] == '7')
2565 && (config->haddr[3] == '.') )
2567 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
2570 else if (config->haddr == NULL)
2572 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
2577 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
2578 config->hport, config->haddr);
2581 result = bind_port(config->haddr, config->hport, &bfd);
2588 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2589 "There may be another Privoxy or some other "
2590 "proxy running on port %d",
2591 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
2592 config->hport, config->hport);
2595 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2596 "The hostname is not resolvable",
2597 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2600 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
2601 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2604 /* shouldn't get here */
2605 return JB_INVALID_SOCKET;
2608 config->need_bind = 0;
2615 /* Without this simple workaround we get this compiler warning from _beginthread
2616 * warning C4028: formal parameter 1 different from declaration
2618 void w32_service_listen_loop(void *p)
2622 #endif /* def _WIN32 */
2625 /*********************************************************************
2627 * Function : listen_loop
2629 * Description : bind the listen port and enter a "FOREVER" listening loop.
2635 *********************************************************************/
2636 static void listen_loop(void)
2638 struct client_state *csp = NULL;
2640 struct configuration_spec * config;
2642 config = load_config();
2644 bfd = bind_port_helper(config);
2646 #ifdef FEATURE_GRACEFUL_TERMINATION
2647 while (!g_terminate)
2652 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
2653 while (waitpid(-1, NULL, WNOHANG) > 0)
2655 /* zombie children */
2657 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
2660 * Free data that was used by died threads
2666 * Re-open the errlog after HUP signal
2668 if (received_hup_signal)
2670 init_error_log(Argv[0], config->logfile, config->debug);
2671 received_hup_signal = 0;
2676 #ifdef FEATURE_COOKIE_JAR
2678 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
2679 * already open. I think unload_configfile() is not being run, which should do
2680 * this work. Until that can get resolved, we'll use this workaround.
2684 if (csp->config->jar)
2686 fclose(csp->config->jar);
2687 csp->config->jar = NULL;
2689 #endif /* FEATURE_COOKIE_JAR */
2690 #endif /* __OS2__ */
2692 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
2694 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
2698 csp->flags |= CSP_FLAG_ACTIVE;
2699 csp->sfd = JB_INVALID_SOCKET;
2701 csp->config = config = load_config();
2703 if ( config->need_bind )
2706 * Since we were listening to the "old port", we will not see
2707 * a "listen" param change until the next IJB request. So, at
2708 * least 1 more request must be made for us to find the new
2709 * setting. I am simply closing the old socket and binding the
2712 * Which-ever is correct, we will serve 1 more page via the
2713 * old settings. This should probably be a "show-proxy-args"
2714 * request. This should not be a so common of an operation
2715 * that this will hurt people's feelings.
2720 bfd = bind_port_helper(config);
2723 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
2725 if (!accept_connection(csp, bfd))
2727 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
2740 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
2743 #ifdef FEATURE_TOGGLE
2744 if (global_toggle_state)
2746 csp->flags |= CSP_FLAG_TOGGLED_ON;
2748 #endif /* def FEATURE_TOGGLE */
2750 if (run_loader(csp))
2752 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
2753 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2757 if (block_acl(NULL,csp))
2759 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
2760 close_socket(csp->cfd);
2764 #endif /* def FEATURE_ACL */
2766 /* add it to the list of clients */
2767 csp->next = clients->next;
2768 clients->next = csp;
2770 if (config->multi_threaded)
2774 /* this is a switch () statment in the C preprocessor - ugh */
2775 #undef SELECTED_ONE_OPTION
2777 /* Use Pthreads in preference to native code */
2778 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
2779 #define SELECTED_ONE_OPTION
2781 pthread_t the_thread;
2782 pthread_attr_t attrs;
2784 pthread_attr_init(&attrs);
2785 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
2786 errno = pthread_create(&the_thread, &attrs,
2787 (void * (*)(void *))serve, csp);
2788 child_id = errno ? -1 : 0;
2789 pthread_attr_destroy(&attrs);
2793 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
2794 #define SELECTED_ONE_OPTION
2795 child_id = _beginthread(
2796 (void (*)(void *))serve,
2801 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
2802 #define SELECTED_ONE_OPTION
2803 child_id = _beginthread(
2804 (void(* _Optlink)(void*))serve,
2810 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
2811 #define SELECTED_ONE_OPTION
2813 thread_id tid = spawn_thread
2814 (server_thread, "server", B_NORMAL_PRIORITY, csp);
2816 if ((tid >= 0) && (resume_thread(tid) == B_OK))
2818 child_id = (int) tid;
2827 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2828 #define SELECTED_ONE_OPTION
2829 csp->cfd = ReleaseSocket(csp->cfd, -1);
2832 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
2833 NP_Output, Output(),
2834 NP_CloseOutput, FALSE,
2835 NP_Name, (ULONG)"privoxy child",
2839 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
2840 NP_Output, Output(),
2841 NP_CloseOutput, FALSE,
2842 NP_Name, (ULONG)"privoxy child",
2843 NP_StackSize, 200*1024,
2849 ((struct Task *)child_id)->tc_UserData = csp;
2850 Signal((struct Task *)child_id, SIGF_SINGLE);
2855 #if !defined(SELECTED_ONE_OPTION)
2858 /* This block is only needed when using fork().
2859 * When using threads, the server thread was
2860 * created and run by the call to _beginthread().
2862 if (child_id == 0) /* child */
2865 #ifdef FEATURE_TOGGLE
2866 int inherited_toggle_state = global_toggle_state;
2867 #endif /* def FEATURE_TOGGLE */
2872 * If we've been toggled or we've blocked the request, tell Mom
2875 #ifdef FEATURE_TOGGLE
2876 if (inherited_toggle_state != global_toggle_state)
2878 rc |= RC_FLAG_TOGGLED;
2880 #endif /* def FEATURE_TOGGLE */
2882 #ifdef FEATURE_STATISTICS
2883 if (csp->flags & CSP_FLAG_REJECTED)
2885 rc |= RC_FLAG_BLOCKED;
2887 #endif /* ndef FEATURE_STATISTICS */
2891 else if (child_id > 0) /* parent */
2893 /* in a fork()'d environment, the parent's
2894 * copy of the client socket and the CSP
2898 #if !defined(_WIN32) && !defined(__CYGWIN__)
2900 wait( &child_status );
2903 * Evaluate child's return code: If the child has
2904 * - been toggled, toggle ourselves
2905 * - blocked its request, bump up the stats counter
2908 #ifdef FEATURE_TOGGLE
2909 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
2911 global_toggle_state = !global_toggle_state;
2913 #endif /* def FEATURE_TOGGLE */
2915 #ifdef FEATURE_STATISTICS
2917 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
2921 #endif /* def FEATURE_STATISTICS */
2923 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
2924 close_socket(csp->cfd);
2925 csp->flags &= ~CSP_FLAG_ACTIVE;
2929 #undef SELECTED_ONE_OPTION
2930 /* end of cpp switch () */
2932 if (child_id < 0) /* failed */
2934 char buf[BUFFER_SIZE];
2936 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
2938 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
2940 write_socket(csp->cfd, buf, strlen(buf));
2941 close_socket(csp->cfd);
2942 csp->flags &= ~CSP_FLAG_ACTIVE;
2953 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
2955 /* Clean up. Aim: free all memory (no leaks) */
2956 #ifdef FEATURE_GRACEFUL_TERMINATION
2958 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
2960 unload_current_config_file();
2961 unload_current_actions_file();
2962 unload_current_re_filterfile();
2963 #ifdef FEATURE_TRUST
2964 unload_current_trust_file();
2967 if (config->multi_threaded)
2974 } while ((clients->next != NULL) && (--i > 0));
2978 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
2989 #ifdef FEATURE_COOKIE_JAR
2990 if (NULL != config->jar)
2992 fclose(config->jar);
2996 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
2997 /* Cleanup - remove taskbar icon etc. */
3002 #endif /* FEATURE_GRACEFUL_TERMINATION */