1 const char jcc_rcs[] = "$Id: jcc.c,v 1.117 2006/12/31 17:56:37 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 1.117 2006/12/31 17:56:37 fabiankeil
37 * Added config option accept-intercepted-requests
38 * and disabled it by default.
40 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
41 * Reverted parts of my last commit
42 * to keep error handling working.
44 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
45 * Fixed gcc43 conversion warnings.
47 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
48 * Fix -pedantic ISO C warning about converting
49 * from function pointer to object pointer.
51 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
52 * Silence compiler warning I introduced with my last commit.
54 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
55 * Mutex protect rand() if POSIX threading
56 * is used, warn the user if that's not possible
57 * and stop using it on _WIN32 where it could
60 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
61 * Don't prevent core dumps by catching SIGABRT.
62 * It's rude and makes debugging unreasonable painful.
64 * Revision 1.110 2006/12/13 14:52:53 etresoft
65 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
67 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
68 * Privoxy is now able to run as intercepting
69 * proxy in combination with any packet filter
70 * that does the port redirection. The destination
71 * is extracted from the "Host:" header which
72 * should be available for nearly all requests.
74 * Moved HTTP snipplets into jcc.c.
75 * Added error message for gopher proxy requests.
77 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
78 * Only unlink the pidfile if it's actually used.
80 * Change order of interception checks to make
81 * it possible to block or redirect requests for
84 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
85 * Make pthread mutex locking more generic. Instead of
86 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
87 * and use mutex locking unless there is an _r function
88 * available. Better safe than sorry.
90 * Fixes "./configure --disable-pthread" and should result
91 * in less threading-related problems on pthread-using platforms,
92 * but it still doesn't fix BR#1122404.
94 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
95 * Move pthread.h inclusion from jcc.c to jcc.h.
96 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
98 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
99 * Don't exit after receiving the second SIGHUP on Solaris.
101 * Fixes BR 1052235, but the same problem may exist on other
102 * systems. Once 3.0.6 is out we should use sigset()
103 * where available and see if it breaks anything.
105 * Revision 1.104 2006/09/23 13:26:38 roro
106 * Replace TABs by spaces in source code.
108 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
109 * Fix +redirect{}. Didn't work with -fast-redirects.
111 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
112 * Respond with 400 and a short text message
113 * if the client tries to use Privoxy as FTP proxy.
115 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
116 * Make number of retries in case of forwarded-connect problems
117 * a config file option (forwarded-connect-retries) and use 0 as
120 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
121 * Set random(3) seed.
123 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
124 * Follow the OpenBSD port's lead and protect the resolve
125 * functions on OpenBSD as well.
127 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
128 * --user fix. Only use the user as group if no group is specified.
129 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
131 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
132 * Windows service (re-)integration
136 * --install[:service_name]
137 * --uninstall[:service_name]
140 * They work as follows:
141 * --install will create a service for you and then terminate.
142 * By default the service name will be "privoxy" (without the quotes).
143 * However you can run multiple services if you wish, just by adding
144 * a colon and then a name (no spaces).
146 * --uninstall follows the exact same rules a --install.
148 * --service is used when the program is executed by the service
149 * control manager, and in normal circumstances would never be
150 * used as a command line argument.
152 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
153 * Windows service integration
155 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
156 * Incorporate Fabian Keil's patch work:
157 http://www.fabiankeil.de/sourcecode/privoxy/
159 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
160 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
161 * with what was really the latest development (the v_3_0_branch branch)
163 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
164 * Thanks to Jindrich Makovicka for a race condition fix for the log
165 * file. The race condition remains for non-pthread implementations.
166 * Reference patch #1175720.
168 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
169 * Add the ability to check jpeg images for invalid
170 * lengths of comment blocks. Defensive strategy
171 * against the exploit:
172 * Microsoft Security Bulletin MS04-028
173 * Buffer Overrun in JPEG Processing (GDI+) Could
174 * Allow Code Execution (833987)
175 * Enabled with +inspect-jpegs in actions files.
177 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
178 * - Fixed usage info for non-unix platforms
179 * - Fixed small cmdline parsing bug
181 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
182 * Diagnostics: Now preserve the returncode of pthread_create
183 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
185 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
186 * No longer ignore SIGCHLD. Fixes bug #769381
188 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
189 * Close jarfile on graceful exit, remove stray line
191 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
192 * Cosmetics: Killed a warning, a typo and an allocation left at exit
194 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
195 * No longer rely on non-POSIX.1 extensions of getcwd().
198 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
199 * Replaced setenv() by posix-compliant putenv()
200 * Thanks to Neil McCalden (nmcc AT users.sf.net).
202 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
203 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
205 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
206 * Clean-up and extension of improvements for forked mode:
207 * - Child's return code now consists of flags RC_FLAG_*
208 * - Reporting toggle to parent now properly #ifdef'ed
209 * - Children now report blocking to parent. This enables
210 * statistics in forked mode
212 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
213 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
214 * Children now report having been toggled through _exit(17), parents
215 * watch for that code and toggle themselves if found.
217 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
218 * Wrapping all *_r functions (the non-_r versions of them) with
219 * mutex semaphores for OSX. Hopefully this will take care of all
220 * of those pesky crash reports.
222 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
223 * Fixed two mostly harmless mem leaks
225 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
226 * Fix: Head of global clients list now initialized to NULL
228 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
229 * Added basic support for OPTIONS and TRACE HTTP methods:
230 * - New interceptor direct_response() added in chat().
231 * - sed() moved to earlier in the process, so that the
232 * Host: header is evaluated before actions and forwarding
235 * Revision 1.92 2002/05/08 16:00:46 oes
236 * Chat's buffer handling:
237 * - Fixed bug with unchecked out-of-mem conditions
238 * while reading client request & server headers
239 * - No longer predict if the buffer limit will be exceeded
240 * in the next read -- check add_to_iob's new
241 * return code. If buffer couldn't be extended
242 * (policy or out-of-mem) while
243 * - reading from client: abort
244 * - reading server headers: send error page
245 * - buffering server body for filter: flush,
246 * and if that fails: send error page
248 * Revision 1.91 2002/04/08 20:35:58 swa
251 * Revision 1.90 2002/04/02 14:57:28 oes
252 * Made sending wafers independent of FEATURE_COOKIE_JAR
254 * Revision 1.89 2002/03/31 17:18:59 jongfoster
255 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
257 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
258 * More compiler warning message maintenance
260 * Revision 1.87 2002/03/26 22:29:54 swa
261 * we have a new homepage!
263 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
264 * Workaround for closing the jarfile before load_config() comes around again
266 * Revision 1.85 2002/03/24 15:23:33 jongfoster
269 * Revision 1.84 2002/03/24 13:25:43 swa
270 * name change related issues
272 * Revision 1.83 2002/03/16 23:54:06 jongfoster
273 * Adding graceful termination feature, to help look for memory leaks.
274 * If you enable this (which, by design, has to be done by hand
275 * editing config.h) and then go to http://i.j.b/die, then the program
276 * will exit cleanly after the *next* request. It should free all the
277 * memory that was used.
279 * Revision 1.82 2002/03/13 00:27:05 jongfoster
282 * Revision 1.81 2002/03/12 01:42:50 oes
283 * Introduced modular filters
285 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
286 * OS/2 port maintenance:
287 * - Fixed EMX build - it had decayed a little
288 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
289 * substituted a memset for now.
291 * Revision 1.79 2002/03/09 20:03:52 jongfoster
292 * - Making various functions return int rather than size_t.
293 * (Undoing a recent change). Since size_t is unsigned on
294 * Windows, functions like read_socket that return -1 on
295 * error cannot return a size_t.
297 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
298 * crashes, and also frequently caused JB to jump to 100%
299 * CPU and stay there. (Because it thought it had just
300 * read ((unsigned)-1) == 4Gb of data...)
302 * - The signature of write_socket has changed, it now simply
303 * returns success=0/failure=nonzero.
305 * - Trying to get rid of a few warnings --with-debug on
306 * Windows, I've introduced a new type "jb_socket". This is
307 * used for the socket file descriptors. On Windows, this
308 * is SOCKET (a typedef for unsigned). Everywhere else, it's
309 * an int. The error value can't be -1 any more, so it's
310 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
311 * Windows it maps to the #define INVALID_SOCKET.)
313 * - The signature of bind_port has changed.
315 * Revision 1.78 2002/03/08 21:35:04 oes
316 * Added optional group supplement to --user option. Will now use default group of user if no group given
318 * Revision 1.77 2002/03/07 03:52:06 oes
319 * - Fixed compiler warnings etc
320 * - Improved handling of failed DNS lookups
322 * Revision 1.76 2002/03/06 22:54:35 jongfoster
323 * Automated function-comment nitpicking.
325 * Revision 1.75 2002/03/06 10:02:19 oes
326 * Fixed stupid bug when --user was not given
328 * Revision 1.74 2002/03/06 00:49:31 jongfoster
329 * Fixing warning on Windows
330 * Making #ifdefs that refer to the same variable consistently
331 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
333 * Revision 1.73 2002/03/05 23:57:30 hal9
334 * Stray character 's' on line 1618 was breaking build.
336 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
337 * - Re-enable OS/2 building after new parms were added
338 * - Fix false out of memory report when resolving CGI templates when no IP
339 * address is available of failed attempt (a la no such domain)
341 * Revision 1.71 2002/03/05 18:13:56 oes
342 * Added --user option
344 * Revision 1.70 2002/03/05 04:52:42 oes
345 * Deleted non-errlog debugging code
347 * Revision 1.69 2002/03/04 23:50:00 jongfoster
348 * Splitting off bind_port() call into bind_port_helper(), with
351 * Revision 1.68 2002/03/04 20:17:32 oes
354 * Revision 1.67 2002/03/04 18:18:57 oes
355 * - Removed _DEBUG mode
356 * - Cleand up cmdline parsing
357 * - Introduced --no-daemon, --pidfile options
358 * - Cleaned up signal handling:
359 * - Terminate cleanly on INT, TERM and ABRT
360 * - Schedule logfile for re-opening on HUP
361 * - Ignore CHLD and PIPE
362 * - Leave the rest with their default handlers
363 * - Uniform handler registration
364 * - Added usage() function
365 * - Played styleguide police
367 * Revision 1.66 2002/03/03 15:06:55 oes
368 * Re-enabled automatic config reloading
370 * Revision 1.65 2002/03/03 14:49:11 oes
371 * Fixed CLF logging: Now uses client's original HTTP request
373 * Revision 1.64 2002/03/03 09:18:03 joergs
374 * Made jumbjuster work on AmigaOS again.
376 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
377 * Clean up a little CRLF unpleasantness that suddenly appeared
379 * Revision 1.62 2002/02/20 23:17:23 jongfoster
380 * Detecting some out-of memory conditions and exiting with a log message.
382 * Revision 1.61 2002/01/17 21:01:52 jongfoster
383 * Moving all our URL and URL pattern parsing code to urlmatch.c.
385 * Revision 1.60 2001/12/30 14:07:32 steudten
386 * - Add signal handling (unix)
387 * - Add SIGHUP handler (unix)
388 * - Add creation of pidfile (unix)
389 * - Add action 'top' in rc file (RH)
390 * - Add entry 'SIGNALS' to manpage
391 * - Add exit message to logfile (unix)
393 * Revision 1.59 2001/12/13 14:07:18 oes
394 * Fixed Bug: 503 error page now sent OK
396 * Revision 1.58 2001/11/30 23:37:24 jongfoster
397 * Renaming the Win32 config file to config.txt - this is almost the
398 * same as the corresponding UNIX name "config"
400 * Revision 1.57 2001/11/16 00:47:43 jongfoster
401 * Changing the tty-disconnection code to use setsid().
403 * Revision 1.56 2001/11/13 20:20:54 jongfoster
404 * Tabs->spaces, fixing a bug with missing {} around an if()
406 * Revision 1.55 2001/11/13 20:14:53 jongfoster
407 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
409 * Revision 1.54 2001/11/07 00:03:14 steudten
410 * Give reliable return value if an error
411 * occurs not just 0 with new daemon mode.
413 * Revision 1.53 2001/11/05 21:41:43 steudten
414 * Add changes to be a real daemon just for unix os.
415 * (change cwd to /, detach from controlling tty, set
416 * process group and session leader to the own process.
418 * Add some fatal-error log message for failed malloc().
419 * Add '-d' if compiled with 'configure --with-debug' to
420 * enable debug output.
422 * Revision 1.52 2001/10/26 20:11:20 jongfoster
423 * Fixing type mismatch
425 * Revision 1.51 2001/10/26 17:38:28 oes
428 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
429 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
430 * threads to call select() simultaneously. So, it's time to do a real, live,
431 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
432 * (native). Both versions will work, but using __OS2__ offers multi-threading.
434 * Revision 1.49 2001/10/23 21:41:35 jongfoster
435 * Added call to initialize the (statically-allocated of course)
436 * "out of memory" CGI response.
438 * Revision 1.48 2001/10/10 19:56:46 jongfoster
439 * Moving some code that wasn't cookie-related out of an #ifdef
442 * Revision 1.47 2001/10/10 16:44:36 oes
443 * Added CONNECT destination port limitation check
445 * Revision 1.46 2001/10/08 15:17:41 oes
446 * Re-enabled SSL forwarding
448 * Revision 1.45 2001/10/07 15:42:11 oes
449 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
451 * Moved downgrading of the HTTP version from parse_http_request to
452 * chat(), since we can't decide if it is necessary before we have
453 * determined the actions for the URL. The HTTP command is now
454 * *always* re-built so the repairs need no longer be special-cased.
456 * filter_popups now gets a csp pointer so it can raise the new
457 * CSP_FLAG_MODIFIED flag.
461 * Added configurable size limit for the IOB. If the IOB grows so
462 * large that the next read would exceed the limit, the header
463 * is generated, and the header & unfiltered buffer are flushed
464 * to the client. Chat then continues in non-buffering,
465 * non-filtering body mode.
467 * Revision 1.44 2001/10/02 18:13:57 oes
470 * Revision 1.43 2001/10/02 15:32:13 oes
471 * Moved generation of hdr
473 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
474 * Cleaning up 2 compiler warnings on OS/2.
476 * Revision 1.41 2001/09/16 17:05:14 jongfoster
477 * Removing unused #include showarg.h
479 * Revision 1.40 2001/09/16 15:41:45 jongfoster
480 * Fixing signed/unsigned comparison warning.
482 * Revision 1.39 2001/09/16 13:21:27 jongfoster
483 * Changes to use new list functions.
485 * Revision 1.38 2001/09/16 13:01:46 jongfoster
486 * Removing redundant function call that zeroed zalloc()'d memory.
488 * Revision 1.37 2001/09/10 11:12:24 oes
489 * Deleted unused variable
491 * Revision 1.36 2001/09/10 10:56:15 oes
492 * Silenced compiler warnings
494 * Revision 1.35 2001/07/31 14:44:22 oes
495 * Deleted unused size parameter from filter_popups()
497 * Revision 1.34 2001/07/30 22:08:36 jongfoster
498 * Tidying up #defines:
499 * - All feature #defines are now of the form FEATURE_xxx
500 * - Permanently turned off WIN_GUI_EDIT
501 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
503 * Revision 1.33 2001/07/29 19:32:00 jongfoster
504 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
506 * Revision 1.32 2001/07/29 18:47:05 jongfoster
507 * Adding missing #include "loadcfg.h"
509 * Revision 1.31 2001/07/29 12:17:48 oes
510 * Applied pthread fix by Paul Lieverse
512 * Revision 1.30 2001/07/25 22:57:13 jongfoster
513 * __BEOS__ no longer overrides FEATURE_PTHREAD.
514 * This is because FEATURE_PTHREAD will soon be widely used, so I
515 * want to keep it simple.
517 * Revision 1.29 2001/07/24 12:47:06 oes
518 * Applied BeOS support update by Eugenia
520 * Revision 1.28 2001/07/23 13:26:12 oes
521 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
523 * Revision 1.27 2001/07/19 19:09:47 haroon
524 * - Added code to take care of the situation where while processing the first
525 * server response (which includes the server header), after finding the end
526 * of the headers we were not looking past the end of the headers for
527 * content modification. I enabled it for filter_popups.
528 * Someone else should look to see if other similar operations should be
529 * done to the discarded portion of the buffer.
531 * Note 2001/07/20: No, the other content modification mechanisms will process
532 * the whole iob later anyway. --oes
534 * Revision 1.26 2001/07/18 12:31:36 oes
537 * Revision 1.25 2001/07/15 19:43:49 jongfoster
538 * Supports POSIX threads.
539 * Also removed some unused #includes.
541 * Revision 1.24 2001/07/13 14:00:40 oes
542 * - Generic content modification scheme:
543 * Each feature has its own applicability flag that is set
544 * from csp->action->flags.
545 * Replaced the "filtering" int flag , by a function pointer
546 * "content_filter" to the function that will do the content
547 * modification. If it is != NULL, the document will be buffered
548 * and processed through *content_filter, which must set
549 * csp->content_length and return a modified copy of the body
550 * or return NULL (on failiure).
551 * - Changed csp->is_text to the more generic bitmap csp->content_type
552 * which can currently take the valued CT_TEXT or CT_GIF
554 * - Removed all #ifdef PCRS
556 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
557 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
558 * the `block_acl' call. This prevents a compilation error when the user
559 * does not wish to use the "ACL" feature.
561 * Revision 1.22 2001/06/29 21:45:41 oes
562 * Indentation, CRLF->LF, Tab-> Space
564 * Revision 1.21 2001/06/29 13:29:36 oes
565 * - Cleaned up, improved comments
566 * - Unified all possible interceptors (CGI,
567 * block, trust, fast_redirect) in one
568 * place, with one (CGI) answer generation
569 * mechansim. Much clearer now.
570 * - Removed the GIF image generation, which
571 * is now done in filters.c:block_url()
572 * - Made error conditions like domain lookup
573 * failiure or (various) problems while talking
574 * to the server use cgi.c:error_response()
575 * instead of generating HTML/HTTP in chat() (yuck!)
576 * - Removed logentry from cancelled commit
578 * Revision 1.20 2001/06/09 10:55:28 jongfoster
579 * Changing BUFSIZ ==> BUFFER_SIZE
581 * Revision 1.19 2001/06/07 23:12:52 jongfoster
582 * Replacing function pointer in struct gateway with a directly
583 * called function forwarded_connect().
584 * Replacing struct gateway with struct forward_spec
586 * Revision 1.18 2001/06/03 19:12:16 oes
587 * introduced new cgi handling
589 * Revision 1.17 2001/06/01 20:07:23 jongfoster
590 * Now uses action +image-blocker{} rather than config->tinygif
592 * Revision 1.16 2001/06/01 18:49:17 jongfoster
593 * Replaced "list_share" with "list" - the tiny memory gain was not
594 * worth the extra complexity.
596 * Revision 1.15 2001/05/31 21:24:47 jongfoster
597 * Changed "permission" to "action" throughout.
598 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
599 * Moved vanilla wafer check into chat(), since we must now
600 * decide whether or not to add it based on the URL.
602 * Revision 1.14 2001/05/29 20:14:01 joergs
603 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
606 * Revision 1.13 2001/05/29 09:50:24 jongfoster
607 * Unified blocklist/imagelist/permissionslist.
608 * File format is still under discussion, but the internal changes
611 * Also modified interceptor behaviour:
612 * - We now intercept all URLs beginning with one of the following
613 * prefixes (and *only* these prefixes):
615 * * http://ijbswa.sf.net/config/
616 * * http://ijbswa.sourceforge.net/config/
617 * - New interceptors "home page" - go to http://i.j.b/ to see it.
618 * - Internal changes so that intercepted and fast redirect pages
619 * are not replaced with an image.
620 * - Interceptors now have the option to send a binary page direct
621 * to the client. (i.e. ijb-send-banner uses this)
622 * - Implemented show-url-info interceptor. (Which is why I needed
623 * the above interceptors changes - a typical URL is
624 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
625 * The previous mechanism would not have intercepted that, and
626 * if it had been intercepted then it then it would have replaced
629 * Revision 1.12 2001/05/27 22:17:04 oes
631 * - re_process_buffer no longer writes the modified buffer
632 * to the client, which was very ugly. It now returns the
633 * buffer, which it is then written by chat.
635 * - content_length now adjusts the Content-Length: header
636 * for modified documents rather than crunch()ing it.
637 * (Length info in csp->content_length, which is 0 for
638 * unmodified documents)
640 * - For this to work, sed() is called twice when filtering.
642 * Revision 1.11 2001/05/26 17:27:53 jongfoster
643 * Added support for CLF and fixed LOG_LEVEL_LOG.
644 * Also did CRLF->LF fix of my previous patch.
646 * Revision 1.10 2001/05/26 15:26:15 jongfoster
647 * ACL feature now provides more security by immediately dropping
648 * connections from untrusted hosts.
650 * Revision 1.9 2001/05/26 00:28:36 jongfoster
651 * Automatic reloading of config file.
652 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
653 * Most of the global variables have been moved to a new
654 * struct configuration_spec, accessed through csp->config->globalname
655 * Most of the globals remaining are used by the Win32 GUI.
657 * Revision 1.8 2001/05/25 22:43:18 jongfoster
658 * Fixing minor memory leak and buffer overflow.
660 * Revision 1.7 2001/05/25 22:34:30 jongfoster
663 * Revision 1.6 2001/05/23 00:13:58 joergs
664 * AmigaOS support fixed.
666 * Revision 1.5 2001/05/22 18:46:04 oes
668 * - Enabled filtering banners by size rather than URL
669 * by adding patterns that replace all standard banner
670 * sizes with the "Junkbuster" gif to the re_filterfile
672 * - Enabled filtering WebBugs by providing a pattern
673 * which kills all 1x1 images
675 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
676 * which is selected by the (nonstandard and therefore
677 * capital) letter 'U' in the option string.
678 * It causes the quantifiers to be ungreedy by default.
679 * Appending a ? turns back to greedy (!).
681 * - Added a new interceptor ijb-send-banner, which
682 * sends back the "Junkbuster" gif. Without imagelist or
683 * MSIE detection support, or if tinygif = 1, or the
684 * URL isn't recognized as an imageurl, a lame HTML
685 * explanation is sent instead.
687 * - Added new feature, which permits blocking remote
688 * script redirects and firing back a local redirect
690 * The feature is conditionally compiled, i.e. it
691 * can be disabled with --disable-fast-redirects,
692 * plus it must be activated by a "fast-redirects"
693 * line in the config file, has its own log level
694 * and of course wants to be displayed by show-proxy-args
695 * Note: Boy, all the #ifdefs in 1001 locations and
696 * all the fumbling with configure.in and acconfig.h
697 * were *way* more work than the feature itself :-(
699 * - Because a generic redirect template was needed for
700 * this, tinygif = 3 now uses the same.
702 * - Moved GIFs, and other static HTTP response templates
707 * - Removed some >400 CRs again (Jon, you really worked
710 * Revision 1.4 2001/05/21 19:34:01 jongfoster
711 * Made failure to bind() a fatal error.
713 * Revision 1.3 2001/05/20 01:21:20 jongfoster
714 * Version 2.9.4 checkin.
715 * - Merged popupfile and cookiefile, and added control over PCRS
716 * filtering, in new "permissionsfile".
717 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
718 * file error you now get a message box (in the Win32 GUI) rather
719 * than the program exiting with no explanation.
720 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
722 * - Removed tabs from "config"
723 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
724 * - Bumped up version number.
726 * Revision 1.2 2001/05/17 22:34:44 oes
727 * - Added hint on GIF char array generation to jcc.c
728 * - Cleaned CRLF's from the sources and related files
729 * - Repaired logging for REF and FRC
731 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
732 * Initial import of version 2.9.3 source tree
735 *********************************************************************/
741 #include <sys/types.h>
749 # ifndef FEATURE_PTHREAD
753 # include <windows.h>
754 # include <process.h>
755 # endif /* ndef FEATURE_PTHREAD */
758 # ifndef _WIN_CONSOLE
760 # endif /* ndef _WIN_CONSOLE */
761 # include "w32svrapi.h"
763 #else /* ifndef _WIN32 */
765 # if !defined (__OS2__)
767 # include <sys/wait.h>
768 # endif /* ndef __OS2__ */
769 # include <sys/time.h>
770 # include <sys/stat.h>
771 # include <sys/ioctl.h>
774 #include <sys/termios.h>
785 # include <socket.h> /* BeOS has select() for sockets only. */
786 # include <OS.h> /* declarations for threads and stuff. */
789 # if defined(__EMX__) || defined(__OS2__)
790 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
795 #define bzero(B,N) memset(B,0x00,n)
810 #include "killpopup.h"
811 #include "miscutil.h"
813 #include "jbsockets.h"
818 #include "urlmatch.h"
820 const char jcc_h_rcs[] = JCC_H_VERSION;
821 const char project_h_rcs[] = PROJECT_H_VERSION;
824 struct client_state clients[1];
825 struct file_list files[1];
827 #ifdef FEATURE_STATISTICS
828 int urls_read = 0; /* total nr of urls read inc rejected */
829 int urls_rejected = 0; /* total nr of urls rejected */
830 #endif /* def FEATURE_STATISTICS */
832 #ifdef FEATURE_GRACEFUL_TERMINATION
836 static void listen_loop(void);
837 static void chat(struct client_state *csp);
839 void serve(struct client_state *csp);
840 #else /* ifndef AMIGA */
841 static void serve(struct client_state *csp);
842 #endif /* def AMIGA */
845 static int32 server_thread(void *data);
846 #endif /* def __BEOS__ */
849 #define sleep(N) Sleep(((N) * 1000))
853 #define sleep(N) DosSleep(((N) * 100))
856 #ifdef FEATURE_PTHREAD
857 pthread_mutex_t log_mutex;
858 pthread_mutex_t log_init_mutex;
860 #ifndef HAVE_GMTIME_R
861 pthread_mutex_t gmtime_mutex;
862 #endif /* ndef HAVE_GMTIME_R */
864 #ifndef HAVE_LOCALTIME_R
865 pthread_mutex_t localtime_mutex;
866 #endif /* ndef HAVE_GMTIME_R */
868 #ifndef HAVE_GETHOSTBYADDR_R
869 pthread_mutex_t gethostbyaddr_mutex;
870 #endif /* ndef HAVE_GETHOSTBYADDR_R */
872 #ifndef HAVE_GETHOSTBYNAME_R
873 pthread_mutex_t gethostbyname_mutex;
874 #endif /* ndef HAVE_GETHOSTBYNAME_R */
877 pthread_mutex_t rand_mutex;
878 #endif /* ndef HAVE_RANDOM */
880 #endif /* FEATURE_PTHREAD */
882 #if defined(unix) || defined(__EMX__)
883 const char *basedir = NULL;
884 const char *pidfile = NULL;
885 int received_hup_signal = 0;
886 #endif /* defined unix */
888 /* The vanilla wafer. */
889 static const char VANILLA_WAFER[] =
890 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
891 "Do_not_send_me_any_copyrighted_information_other_than_the_"
892 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
893 "In_particular_do_not_send_me_any_cookies_that_"
894 "are_subject_to_a_claim_of_copyright_by_anybody._"
895 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
896 "(copyright_or_otherwise)_applying_to_any_cookie._";
898 /* HTTP snipplets. */
899 const char CSUCCEED[] =
900 "HTTP/1.0 200 Connection established\n"
901 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
903 const char CHEADER[] =
904 "HTTP/1.0 400 Invalid header received from browser\r\n"
905 "Connection: close\r\n\r\n"
906 "Invalid header received from browser.";
908 const char CFORBIDDEN[] =
909 "HTTP/1.0 403 Connection not allowable\r\n"
910 "X-Hint: If you read this message interactively, then you know why this happens ,-)\r\n"
911 "Connection: close\r\n\r\n";
913 const char FTP_RESPONSE[] =
914 "HTTP/1.0 400 Invalid request received from browser\r\n"
915 "Connection: close\r\n\r\n"
916 "Invalid request. Privoxy doesn't support FTP.\r\n";
918 const char GOPHER_RESPONSE[] =
919 "HTTP/1.0 400 Invalid request received from browser\r\n"
920 "Connection: close\r\n\r\n"
921 "Invalid request. Privoxy doesn't support gopher.\r\n";
923 const char MISSING_DESTINATION_RESPONSE[] =
924 "HTTP/1.0 400 Bad request received from browser\r\n"
925 "Connection: close\r\n\r\n"
926 "Bad request. Privoxy was unable to extract the destination.\r\n";
929 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
930 /*********************************************************************
932 * Function : sig_handler
934 * Description : Signal handler for different signals.
935 * Exit gracefully on TERM and INT
936 * or set a flag that will cause the errlog
937 * to be reopened by the main thread on HUP.
940 * 1 : the_signal = the signal cause this function to call
944 *********************************************************************/
945 static void sig_handler(int the_signal)
951 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
962 received_hup_signal = 1;
967 * We shouldn't be here, unless we catch signals
968 * in main() that we can't handle here!
970 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
978 /*********************************************************************
982 * Description : Once a connection to the client has been accepted,
983 * this function is called (via serve()) to handle the
984 * main business of the communication. When this
985 * function returns, the caller must close the client
989 * 1 : csp = Current client state (buffers, headers, etc...)
991 * Returns : On success, the number of bytes written are returned (zero
992 * indicates nothing was written). On error, -1 is returned,
993 * and errno is set appropriately. If count is zero and the
994 * file descriptor refers to a regular file, 0 will be
995 * returned without causing any other effect. For a special
996 * file, the results are not portable.
998 *********************************************************************/
999 static void chat(struct client_state *csp)
1002 * This next lines are a little ugly, but they simplifies the if statements
1003 * below. Basically if TOGGLE, then we want the if to test if the
1004 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
1005 * then we want the if to test for CSP_FLAG_FORCED , else we don't
1007 #ifdef FEATURE_TOGGLE
1008 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
1009 #else /* ifndef FEATURE_TOGGLE */
1010 # define IS_TOGGLED_ON_AND
1011 #endif /* ndef FEATURE_TOGGLE */
1012 #ifdef FEATURE_FORCE_LOAD
1013 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
1014 #else /* ifndef FEATURE_FORCE_LOAD */
1015 # define IS_NOT_FORCED_AND
1016 #endif /* def FEATURE_FORCE_LOAD */
1018 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
1020 char buf[BUFFER_SIZE];
1028 int ms_iis5_hack = 0;
1029 size_t byte_count = 0;
1030 int forwarded_connect_retries = 0;
1031 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
1032 const struct forward_spec * fwd;
1033 struct http_request *http;
1034 int len; /* for buffer sizes (and negative error codes) */
1035 #ifdef FEATURE_KILL_POPUPS
1036 int block_popups; /* bool, 1==will block popups */
1037 int block_popups_now = 0; /* bool, 1==currently blocking popups */
1038 #endif /* def FEATURE_KILL_POPUPS */
1040 int pcrs_filter; /* bool, 1==will filter through pcrs */
1041 int gif_deanimate; /* bool, 1==will deanimate gifs */
1042 int jpeg_inspect; /* bool, 1==will inspect jpegs */
1044 /* Function that does the content filtering for the current request */
1045 char *(*content_filter)() = NULL;
1047 /* Skeleton for HTTP response, if we should intercept the request */
1048 struct http_response *rsp;
1050 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1051 struct list header_list;
1052 struct list *headers = &header_list;
1057 * Read the client's request. Note that since we're not using select() we
1058 * could get blocked here if a client connected, then didn't say anything!
1063 len = read_socket(csp->cfd, buf, sizeof(buf));
1065 if (len <= 0) break; /* error! */
1068 * If there is no memory left for buffering the
1069 * request, there is nothing we can do but hang up
1071 if (add_to_iob(csp, buf, len))
1076 req = get_header(csp);
1080 break; /* no HTTP request! */
1085 continue; /* more to come! */
1089 * If it's a FTP or gopher request, we don't support it.
1091 * These checks are better than nothing, but they might
1092 * not work in all configurations and some clients might
1093 * have problems digesting the answer.
1095 * They should, however, never cause more problems than
1096 * Privoxy's old behaviour (returning the misleading HTML error message:
1097 * "Could not resolve http://(ftp|gopher)://example.org").
1099 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1101 if (!strncmpic(req, "GET ftp://", 10))
1103 strcpy(buf, FTP_RESPONSE);
1104 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as FTP proxy: %s",
1105 csp->ip_addr_str, req);
1109 strcpy(buf, GOPHER_RESPONSE);
1110 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as gopher proxy: %s",
1111 csp->ip_addr_str, req);
1113 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1115 write_socket(csp->cfd, buf, strlen(buf));
1116 free_http_request(http);
1120 #ifdef FEATURE_FORCE_LOAD
1121 /* If this request contains the FORCE_PREFIX,
1122 * better get rid of it now and set the force flag --oes
1125 if (strstr(req, FORCE_PREFIX))
1127 strclean(req, FORCE_PREFIX);
1128 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
1129 csp->flags |= CSP_FLAG_FORCED;
1132 #endif /* def FEATURE_FORCE_LOAD */
1134 switch( parse_http_request(req, http, csp) )
1137 log_error(LOG_LEVEL_ERROR, "Out of memory while parsing request.");
1140 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", req);
1148 if (http->cmd == NULL)
1150 strcpy(buf, CHEADER);
1151 write_socket(csp->cfd, buf, strlen(buf));
1153 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
1155 free_http_request(http);
1159 /* grab the rest of the client's headers */
1163 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1165 len = read_socket(csp->cfd, buf, sizeof(buf));
1168 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1173 * If there is no memory left for buffering the
1174 * request, there is nothing we can do but hang up
1176 if (add_to_iob(csp, buf, len))
1183 if (p == NULL) break;
1190 if (http->host == NULL)
1193 * Intercepted or invalid request without domain
1194 * inside the request line. Try to get it another way,
1195 * unless accept-intercepted-requests is disabled.
1197 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1199 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1200 " Privoxy isn't configured to accept intercepted requests.",
1201 csp->ip_addr_str, http->cmd);
1202 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, http->cmd);
1204 strcpy(buf, CHEADER);
1205 write_socket(csp->cfd, buf, strlen(buf));
1206 free_http_request(http);
1207 destroy_list(headers);
1210 else if (JB_ERR_OK == get_destination_from_headers(headers, http))
1212 /* Split the domain we just got for pattern matching */
1213 init_domain_components(http);
1217 /* We can't work without destination. Go spread the news.*/
1219 req = list_to_text(headers);
1221 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, http->cmd);
1222 log_error(LOG_LEVEL_ERROR,
1223 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1224 csp->ip_addr_str, http->cmd, req);
1227 strcpy(buf, MISSING_DESTINATION_RESPONSE);
1228 write_socket(csp->cfd, buf, strlen(buf));
1229 free_http_request(http);
1230 destroy_list(headers);
1234 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1235 * to get the destination IP address, use it as host directly
1236 * or do a reverse DNS lookup first.
1240 /* decide how to route the HTTP request */
1242 if ((fwd = forward_url(http, csp)) == NULL)
1244 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1245 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1248 /* build the http request to send to the server
1249 * we have to do one of the following:
1251 * create = use the original HTTP request to create a new
1252 * HTTP request that has either the path component
1253 * without the http://domainspec (w/path) or the
1254 * full orininal URL (w/url)
1255 * Note that the path and/or the HTTP version may
1256 * have been altered by now.
1258 * connect = Open a socket to the host:port of the server
1259 * and short-circuit server and client socket.
1261 * pass = Pass the request unchanged if forwarding a CONNECT
1262 * request to a parent proxy. Note that we'll be sending
1263 * the CFAIL message ourselves if connecting to the parent
1264 * fails, but we won't send a CSUCCEED message if it works,
1265 * since that would result in a double message (ours and the
1266 * parent's). After sending the request to the parent, we simply
1269 * here's the matrix:
1272 * +--------+--------+
1274 * 0 | create | connect|
1276 * Forwarding +--------+--------+
1278 * 1 | create | pass |
1280 * +--------+--------+
1285 * Determine the actions for this URL
1287 #ifdef FEATURE_TOGGLE
1288 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1290 /* Most compatible set of actions (i.e. none) */
1291 init_current_action(csp->action);
1294 #endif /* ndef FEATURE_TOGGLE */
1296 url_actions(http, csp);
1301 * Check if a CONNECT request is allowable:
1302 * In the absence of a +limit-connect action, allow only port 443.
1303 * If there is an action, allow whatever matches the specificaton.
1307 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
1308 || (csp->action->flags & ACTION_LIMIT_CONNECT
1309 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
1311 if (csp->action->flags & ACTION_TREAT_FORBIDDEN_CONNECTS_LIKE_BLOCKS)
1313 /* The response will violate the specs, but makes unblocking easier. */
1314 log_error(LOG_LEVEL_ERROR, "Marking suspicious CONNECT request from %s for blocking.",
1316 csp->action->flags |= ACTION_BLOCK;
1321 strcpy(buf, CFORBIDDEN);
1322 write_socket(csp->cfd, buf, strlen(buf));
1323 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
1324 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
1332 * Downgrade http version from 1.1 to 1.0 if +downgrade
1335 if ( (http->ssl == 0)
1336 && (!strcmpic(http->ver, "HTTP/1.1"))
1337 && (csp->action->flags & ACTION_DOWNGRADE))
1340 http->ver = strdup("HTTP/1.0");
1342 if (http->ver == NULL)
1344 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1349 * Save a copy of the original request for logging
1351 http->ocmd = strdup(http->cmd);
1353 if (http->ocmd == NULL)
1355 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
1359 * (Re)build the HTTP request for non-SSL requests.
1360 * If forwarding, use the whole URL, else, use only the path.
1366 http->cmd = strdup(http->gpc);
1367 string_append(&http->cmd, " ");
1369 if (fwd->forward_host)
1371 string_append(&http->cmd, http->url);
1375 string_append(&http->cmd, http->path);
1377 string_append(&http->cmd, " ");
1378 string_append(&http->cmd, http->ver);
1380 if (http->cmd == NULL)
1382 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1384 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", http->cmd);
1386 enlist(csp->headers, http->cmd);
1388 /* Append the previously read headers */
1389 list_append_list_unique(csp->headers, headers);
1390 destroy_list(headers);
1393 * If the user has not supplied any wafers, and the user has not
1394 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1396 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1397 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1399 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1403 #ifdef FEATURE_KILL_POPUPS
1404 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
1405 #endif /* def FEATURE_KILL_POPUPS */
1407 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
1408 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
1410 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
1412 jpeg_inspect = ((csp->action->flags & ACTION_JPEG_INSPECT) != 0);
1415 * We have a request. Now, check to see if we need to
1416 * intercept it, i.e. If ..
1420 /* We may not forward the request by rfc2616 sect 14.31 */
1421 (NULL != (rsp = direct_response(csp)))
1423 /* or we are enabled and... */
1424 || (IS_ENABLED_AND (
1426 /* ..the request was blocked */
1427 ( NULL != (rsp = block_url(csp)))
1429 /* ..or untrusted */
1430 #ifdef FEATURE_TRUST
1431 || ( NULL != (rsp = trust_url(csp)))
1432 #endif /* def FEATURE_TRUST */
1434 /* ..or a redirect kicked in */
1435 || ( NULL != (rsp = redirect_url(csp)))
1439 * .. or a CGI call was detected and answered.
1441 * This check comes last to give the user the power
1442 * to deny acces to some (or all) of the cgi pages.
1444 || (NULL != (rsp = dispatch_cgi(csp)))
1448 /* Write the answer to the client */
1449 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1450 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1452 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1455 #ifdef FEATURE_STATISTICS
1456 /* Count as a rejected request */
1457 csp->flags |= CSP_FLAG_REJECTED;
1458 #endif /* def FEATURE_STATISTICS */
1460 /* Log (FIXME: All intercept reasons appear as "crunch" with Status 200) */
1461 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
1462 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
1464 /* Clean up and return */
1465 free_http_response(rsp);
1469 hdr = sed(client_patterns, add_client_headers, csp);
1472 /* FIXME Should handle error properly */
1473 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1476 list_remove_all(csp->headers);
1478 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1480 if (fwd->forward_host)
1482 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1483 fwd->forward_host, fwd->forward_port, http->hostport);
1487 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1490 /* here we connect to the server, gateway, or the forwarder */
1492 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
1493 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
1495 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
1496 forwarded_connect_retries, http->hostport);
1499 if (csp->sfd == JB_INVALID_SOCKET)
1501 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1504 if (errno == EINVAL)
1506 rsp = error_response(csp, "no-such-domain", errno);
1508 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
1509 csp->ip_addr_str, http->ocmd);
1513 rsp = error_response(csp, "connect-failed", errno);
1515 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1516 csp->ip_addr_str, http->ocmd);
1520 /* Write the answer to the client */
1523 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1524 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1526 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1530 free_http_response(rsp);
1535 log_error(LOG_LEVEL_CONNECT, "OK");
1537 if (fwd->forward_host || (http->ssl == 0))
1539 /* write the client's (modified) header to the server
1540 * (along with anything else that may be in the buffer)
1543 if (write_socket(csp->sfd, hdr, strlen(hdr))
1544 || (flush_socket(csp->sfd, csp) < 0))
1546 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1549 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1550 csp->ip_addr_str, http->ocmd);
1552 rsp = error_response(csp, "connect-failed", errno);
1556 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1557 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1559 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1563 free_http_response(rsp);
1571 * We're running an SSL tunnel and we're not forwarding,
1572 * so just send the "connect succeeded" message to the
1573 * client, flush the rest, and get out of the way.
1575 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1576 csp->ip_addr_str, http->ocmd);
1578 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
1586 /* we're finished with the client's header */
1589 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1591 /* pass data between the client and server
1592 * until one or the other shuts down the connection.
1601 * FD_ZERO here seems to point to an errant macro which crashes.
1602 * So do this by hand for now...
1604 memset(&rfds,0x00,sizeof(fd_set));
1608 FD_SET(csp->cfd, &rfds);
1609 FD_SET(csp->sfd, &rfds);
1611 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
1615 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1619 /* this is the body of the browser's request
1620 * just read it and write it.
1623 if (FD_ISSET(csp->cfd, &rfds))
1625 len = read_socket(csp->cfd, buf, sizeof(buf));
1629 break; /* "game over, man" */
1632 if (write_socket(csp->sfd, buf, (size_t)len))
1634 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1641 * The server wants to talk. It could be the header or the body.
1642 * If `hdr' is null, then it's the header otherwise it's the body.
1643 * FIXME: Does `hdr' really mean `host'? No.
1647 if (FD_ISSET(csp->sfd, &rfds))
1650 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1654 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1656 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1657 csp->ip_addr_str, http->ocmd);
1659 rsp = error_response(csp, "connect-failed", errno);
1663 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1664 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1666 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1670 free_http_response(rsp);
1674 /* Add a trailing zero. This lets filter_popups
1675 * use string operations.
1679 #ifdef FEATURE_KILL_POPUPS
1680 /* Filter the popups on this read. */
1681 if (block_popups_now)
1683 filter_popups(buf, csp);
1685 #endif /* def FEATURE_KILL_POPUPS */
1687 /* Normally, this would indicate that we've read
1688 * as much as the server has sent us and we can
1689 * close the client connection. However, Microsoft
1690 * in its wisdom has released IIS/5 with a bug that
1691 * prevents it from sending the trailing \r\n in
1692 * a 302 redirect header (and possibly other headers).
1693 * To work around this if we've haven't parsed
1694 * a full header we'll append a trailing \r\n
1695 * and see if this now generates a valid one.
1697 * This hack shouldn't have any impacts. If we've
1698 * already transmitted the header or if this is a
1699 * SSL connection, then we won't bother with this
1700 * hack. So we only work on partially received
1701 * headers. If we append a \r\n and this still
1702 * doesn't generate a valid header, then we won't
1703 * transmit anything to the client.
1708 if (server_body || http->ssl)
1711 * If we have been buffering up the document,
1712 * now is the time to apply content modification
1713 * and send the result to the client.
1718 * If the content filter fails, use the original
1719 * buffer and length.
1720 * (see p != NULL ? p : csp->iob->cur below)
1722 if (NULL == (p = (*content_filter)(csp)))
1724 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
1727 hdr = sed(server_patterns_light, NULL, csp);
1731 /* FIXME Should handle error properly */
1732 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1735 if (write_socket(csp->cfd, hdr, strlen(hdr))
1736 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
1738 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1748 break; /* "game over, man" */
1752 * This is NOT the body, so
1753 * Let's pretend the server just sent us a blank line.
1755 snprintf(buf, sizeof(buf), "\r\n");
1756 len = (int)strlen(buf);
1759 * Now, let the normal header parsing algorithm below do its
1760 * job. If it fails, we'll exit instead of continuing.
1767 * If this is an SSL connection or we're in the body
1768 * of the server document, just write it to the client,
1769 * unless we need to buffer the body for later content-filtering
1772 if (server_body || http->ssl)
1777 * If there is no memory left for buffering the content, or the buffer limit
1778 * has been reached, switch to non-filtering mode, i.e. make & write the
1779 * header, flush the iob and buf, and get out of the way.
1781 if (add_to_iob(csp, buf, len))
1786 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
1788 hdr = sed(server_patterns, add_server_headers, csp);
1792 * Memory is too tight to even generate the header.
1793 * Send our static "Out-of-memory" page.
1795 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
1796 rsp = cgi_error_memory();
1798 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1799 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1801 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1806 hdrlen = strlen(hdr);
1808 if (write_socket(csp->cfd, hdr, hdrlen)
1809 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
1810 || (write_socket(csp->cfd, buf, (size_t)len)))
1812 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
1818 byte_count += hdrlen + (size_t)(flushed + len);
1820 content_filter = NULL;
1827 if (write_socket(csp->cfd, buf, (size_t)len))
1829 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
1833 byte_count += (size_t)len;
1838 /* we're still looking for the end of the
1839 * server's header ... (does that make header
1840 * parsing an "out of body experience" ?
1844 * buffer up the data we just read. If that fails,
1845 * there's little we can do but send our static
1846 * out-of-memory page.
1848 if (add_to_iob(csp, buf, len))
1850 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
1851 rsp = cgi_error_memory();
1853 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1854 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1856 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1861 /* get header lines from the iob */
1863 while ((p = get_header(csp)) != NULL)
1867 /* see following note */
1870 enlist(csp->headers, p);
1874 /* NOTE: there are no "empty" headers so
1875 * if the pointer `p' is not NULL we must
1876 * assume that we reached the end of the
1877 * buffer before we hit the end of the header.
1884 /* Well, we tried our MS IIS/5
1885 * hack and it didn't work.
1886 * The header is incomplete
1887 * and there isn't anything
1888 * we can do about it.
1894 /* Since we have to wait for
1895 * more from the server before
1896 * we can parse the headers
1897 * we just continue here.
1903 /* we have now received the entire header.
1904 * filter it and send the result to the client
1907 hdr = sed(server_patterns, add_server_headers, csp);
1910 /* FIXME Should handle error properly */
1911 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1914 #ifdef FEATURE_KILL_POPUPS
1915 /* Start blocking popups if appropriate. */
1917 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1918 !http->ssl && /* We talk plaintext */
1919 block_popups) /* Policy allows */
1921 block_popups_now = 1;
1923 * Filter the part of the body that came in the same read
1924 * as the last headers:
1926 filter_popups(csp->iob->cur, csp);
1929 #endif /* def FEATURE_KILL_POPUPS */
1931 /* Buffer and pcrs filter this if appropriate. */
1933 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1934 !http->ssl && /* We talk plaintext */
1935 pcrs_filter) /* Policy allows */
1937 content_filter = pcrs_filter_response;
1940 /* Buffer and gif_deanimate this if appropriate. */
1942 if ((csp->content_type & CT_GIF) && /* It's an image/gif MIME-Type */
1943 !http->ssl && /* We talk plaintext */
1944 gif_deanimate) /* Policy allows */
1946 content_filter = gif_deanimate_response;
1949 /* Buffer and jpg_inspect this if appropriate. */
1951 if ((csp->content_type & CT_JPEG) && /* It's an image/jpeg MIME-Type */
1952 !http->ssl && /* We talk plaintext */
1953 jpeg_inspect) /* Policy allows */
1955 content_filter = jpeg_inspect_response;
1959 * Only write if we're not buffering for content modification
1961 if (!content_filter)
1963 /* write the server's (modified) header to
1964 * the client (along with anything else that
1965 * may be in the buffer)
1968 if (write_socket(csp->cfd, hdr, strlen(hdr))
1969 || ((len = flush_socket(csp->cfd, csp)) < 0))
1971 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1973 /* the write failed, so don't bother
1974 * mentioning it to the client...
1975 * it probably can't hear us anyway.
1981 byte_count += (size_t)len;
1984 /* we're finished with the server's header */
1989 /* If this was a MS IIS/5 hack then it means
1990 * the server has already closed the
1991 * connection. Nothing more to read. Time
2002 return; /* huh? we should never get here */
2005 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
2006 csp->ip_addr_str, http->ocmd, byte_count);
2010 /*********************************************************************
2014 * Description : This is little more than chat. We only "serve" to
2015 * to close any socket that chat may have opened.
2018 * 1 : csp = Current client state (buffers, headers, etc...)
2022 *********************************************************************/
2024 void serve(struct client_state *csp)
2025 #else /* ifndef AMIGA */
2026 static void serve(struct client_state *csp)
2027 #endif /* def AMIGA */
2030 close_socket(csp->cfd);
2032 if (csp->sfd != JB_INVALID_SOCKET)
2034 close_socket(csp->sfd);
2037 csp->flags &= ~CSP_FLAG_ACTIVE;
2043 /*********************************************************************
2045 * Function : server_thread
2047 * Description : We only exist to call `serve' in a threaded environment.
2050 * 1 : data = Current client state (buffers, headers, etc...)
2052 * Returns : Always 0.
2054 *********************************************************************/
2055 static int32 server_thread(void *data)
2057 serve((struct client_state *) data);
2064 /*********************************************************************
2068 * Description : Print usage info & exit.
2070 * Parameters : Pointer to argv[0] for identifying ourselves
2074 *********************************************************************/
2075 void usage(const char *myname)
2077 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
2079 "Usage: %s [--help] [--version] [configfile]\n"
2081 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
2083 "Aborting.\n", myname);
2090 /*********************************************************************
2094 * Description : Load the config file and start the listen loop.
2095 * This function is a lot more *sane* with the `load_config'
2096 * and `listen_loop' functions; although it stills does
2097 * a *little* too much for my taste.
2100 * 1 : argc = Number of parameters (including $0).
2101 * 2 : argv = Array of (char *)'s to the parameters.
2103 * Returns : 1 if : can't open config file, unrecognized directive,
2104 * stats requested in multi-thread mode, can't open the
2105 * log file, can't open the jar file, listen port is invalid,
2106 * any load fails, and can't bind port.
2108 * Else main never returns, the process must be signaled
2109 * to terminate execution. Or, on Windows, use the
2110 * "File", "Exit" menu option.
2112 *********************************************************************/
2114 int real_main(int argc, const char *argv[])
2116 int main(int argc, const char *argv[])
2120 unsigned int random_seed;
2122 struct passwd *pw = NULL;
2123 struct group *grp = NULL;
2132 #if !defined(_WIN32)
2140 * Parse the command line arguments
2142 while (++argc_pos < argc)
2145 /* Check to see if the service must be installed or uninstalled */
2146 if (strncmp(argv[argc_pos], "--install", 9) == 0)
2148 const char *pName = argv[argc_pos] + 9;
2151 exit( (install_service(pName)) ? 0 : 1 );
2153 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
2155 const char *pName = argv[argc_pos] + 11;
2158 exit((uninstall_service(pName)) ? 0 : 1);
2160 else if (strcmp(argv[argc_pos], "--service" ) == 0)
2162 bRunAsService = TRUE;
2163 w32_set_service_cwd();
2164 atexit(w32_service_exit_notify);
2167 #endif /* defined(_WIN32) */
2170 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2172 if (strcmp(argv[argc_pos], "--help") == 0)
2177 else if(strcmp(argv[argc_pos], "--version") == 0)
2179 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
2185 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
2190 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
2192 if (++argc_pos == argc) usage(argv[0]);
2193 pidfile = strdup(argv[argc_pos]);
2196 else if (strcmp(argv[argc_pos], "--user" ) == 0)
2198 if (++argc_pos == argc) usage(argv[argc_pos]);
2200 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
2203 if (NULL == (grp = getgrnam(p)))
2205 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
2209 if (NULL == (pw = getpwnam(argv[argc_pos])))
2211 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
2214 if (p != NULL) *--p = '\0';
2217 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
2222 #endif /* defined(unix) */
2223 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
2225 configfile = argv[argc_pos];
2228 } /* -END- while (more arguments) */
2231 if ( *configfile != '/' )
2233 char *abs_file, cwd[1024];
2235 /* make config-filename absolute here */
2236 if ( !(getcwd(cwd, sizeof(cwd))))
2238 perror("get working dir failed");
2242 if (!(basedir = strdup(cwd))
2243 || (!(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))))
2245 perror("malloc failed");
2248 strcpy( abs_file, basedir );
2249 strcat( abs_file, "/" );
2250 strcat( abs_file, configfile );
2251 configfile = abs_file;
2253 #endif /* defined unix */
2257 clients->next = NULL;
2261 #elif defined(_WIN32)
2265 #ifdef FEATURE_PTHREAD
2267 * Prepare global mutex semaphores
2269 pthread_mutex_init(&log_mutex,0);
2270 pthread_mutex_init(&log_init_mutex,0);
2272 #ifndef HAVE_GMTIME_R
2273 pthread_mutex_init(&gmtime_mutex,0);
2274 #endif /* ndef HAVE_GMTIME_R */
2276 #ifndef HAVE_LOCALTIME_R
2277 pthread_mutex_init(&localtime_mutex,0);
2278 #endif /* ndef HAVE_GMTIME_R */
2280 #ifndef HAVE_GETHOSTBYADDR_R
2281 pthread_mutex_init(&gethostbyaddr_mutex,0);
2282 #endif /* ndef HAVE_GETHOSTBYADDR_R */
2284 #ifndef HAVE_GETHOSTBYNAME_R
2285 pthread_mutex_init(&gethostbyname_mutex,0);
2286 #endif /* ndef HAVE_GETHOSTBYNAME_R */
2289 pthread_mutex_init(&rand_mutex,0);
2290 #endif /* ndef HAVE_RANDOM */
2292 #endif /* FEATURE_PTHREAD */
2294 random_seed = (unsigned int)time(NULL);
2296 srandom(random_seed);
2299 #endif /* ifdef HAVE_RANDOM */
2302 * Unix signal handling
2304 * Catch the abort, interrupt and terminate signals for a graceful exit
2305 * Catch the hangup signal so the errlog can be reopened.
2306 * Ignore the broken pipe signals (FIXME: Why?)
2308 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
2311 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
2312 const int ignored_signals[] = { SIGPIPE, 0 };
2314 for (idx = 0; catched_signals[idx] != 0; idx++)
2316 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
2317 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
2319 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
2320 #endif /* ifdef sun */
2322 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
2326 for (idx = 0; ignored_signals[idx] != 0; idx++)
2328 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
2330 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
2335 #else /* ifdef _WIN32 */
2336 # ifdef _WIN_CONSOLE
2338 * We *are* in a windows console app.
2339 * Print a verbose messages about FAQ's and such
2341 printf("%s", win32_blurb);
2342 # endif /* def _WIN_CONSOLE */
2343 #endif /* def _WIN32 */
2346 /* Initialize the CGI subsystem */
2347 cgi_init_error_messages();
2350 * If runnig on unix and without the --nodaemon
2351 * option, become a daemon. I.e. fork, detach
2352 * from tty and get process group leadership
2365 if ( pid < 0 ) /* error */
2370 else if ( pid != 0 ) /* parent */
2375 * must check for errors
2376 * child died due to missing files aso
2379 wpid = waitpid( pid, &status, WNOHANG );
2388 /* Should be more portable, but not as well tested */
2393 #else /* ndef __FreeBSD__ */
2395 #endif /* ndef __FreeBSD__ */
2396 fd = open("/dev/tty", O_RDONLY);
2399 /* no error check here */
2400 ioctl( fd, TIOCNOTTY,0 );
2404 /* FIXME: should close stderr (fd 2) here too, but the test
2406 * and load config file is done in listen_loop() and puts
2407 * some messages on stderr there.
2414 } /* -END- if (!no_daemon) */
2417 * As soon as we have written the PID file, we can switch
2418 * to the user and group ID indicated by the --user option
2424 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
2426 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
2432 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
2434 if (chroot(pw->pw_dir) < 0)
2436 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
2440 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
2443 if (setuid(pw->pw_uid))
2445 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
2449 char putenv_dummy[64];
2451 strcpy(putenv_dummy, "HOME=/");
2452 if (putenv(putenv_dummy) != 0)
2454 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
2457 snprintf(putenv_dummy, 64, "USER=%s", pw->pw_name);
2458 if (putenv(putenv_dummy) != 0)
2460 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
2466 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
2469 #endif /* defined unix */
2472 /* This will be FALSE unless the command line specified --service
2476 /* Yup, so now we must attempt to establish a connection
2477 * with the service dispatcher. This will only work if this
2478 * process was launched by the service control manager to
2479 * actually run as a service. If this isn't the case, i've
2480 * known it take around 30 seconds or so for the call to return.
2483 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
2484 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
2486 /* Service has run, and at this point is now being stopped, so just return */
2491 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
2493 /* An error occurred. Usually it's because --service was wrongly specified
2494 * and we were unable to connect to the Service Control Dispatcher because
2495 * it wasn't expecting us and is therefore not listening.
2497 * For now, just continue below to call the listen_loop function.
2500 #endif /* def _WIN32 */
2510 /*********************************************************************
2512 * Function : bind_port_helper
2514 * Description : Bind the listen port. Handles logging, and aborts
2518 * 1 : config = Privoxy configuration. Specifies port
2521 * Returns : Port that was opened.
2523 *********************************************************************/
2524 static jb_socket bind_port_helper(struct configuration_spec * config)
2529 if ( (config->haddr != NULL)
2530 && (config->haddr[0] == '1')
2531 && (config->haddr[1] == '2')
2532 && (config->haddr[2] == '7')
2533 && (config->haddr[3] == '.') )
2535 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
2538 else if (config->haddr == NULL)
2540 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
2545 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
2546 config->hport, config->haddr);
2549 result = bind_port(config->haddr, config->hport, &bfd);
2556 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2557 "There may be another Privoxy or some other "
2558 "proxy running on port %d",
2559 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
2560 config->hport, config->hport);
2563 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2564 "The hostname is not resolvable",
2565 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2568 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
2569 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2572 /* shouldn't get here */
2573 return JB_INVALID_SOCKET;
2576 config->need_bind = 0;
2583 /* Without this simple workaround we get this compiler warning from _beginthread
2584 * warning C4028: formal parameter 1 different from declaration
2586 void w32_service_listen_loop(void *p)
2590 #endif /* def _WIN32 */
2593 /*********************************************************************
2595 * Function : listen_loop
2597 * Description : bind the listen port and enter a "FOREVER" listening loop.
2603 *********************************************************************/
2604 static void listen_loop(void)
2606 struct client_state *csp = NULL;
2608 struct configuration_spec * config;
2610 config = load_config();
2612 bfd = bind_port_helper(config);
2614 #ifdef FEATURE_GRACEFUL_TERMINATION
2615 while (!g_terminate)
2620 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
2621 while (waitpid(-1, NULL, WNOHANG) > 0)
2623 /* zombie children */
2625 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
2628 * Free data that was used by died threads
2634 * Re-open the errlog after HUP signal
2636 if (received_hup_signal)
2638 init_error_log(Argv[0], config->logfile, config->debug);
2639 received_hup_signal = 0;
2644 #ifdef FEATURE_COOKIE_JAR
2646 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
2647 * already open. I think unload_configfile() is not being run, which should do
2648 * this work. Until that can get resolved, we'll use this workaround.
2652 if (csp->config->jar)
2654 fclose(csp->config->jar);
2655 csp->config->jar = NULL;
2657 #endif /* FEATURE_COOKIE_JAR */
2658 #endif /* __OS2__ */
2660 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
2662 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
2666 csp->flags |= CSP_FLAG_ACTIVE;
2667 csp->sfd = JB_INVALID_SOCKET;
2669 csp->config = config = load_config();
2671 if ( config->need_bind )
2674 * Since we were listening to the "old port", we will not see
2675 * a "listen" param change until the next IJB request. So, at
2676 * least 1 more request must be made for us to find the new
2677 * setting. I am simply closing the old socket and binding the
2680 * Which-ever is correct, we will serve 1 more page via the
2681 * old settings. This should probably be a "show-proxy-args"
2682 * request. This should not be a so common of an operation
2683 * that this will hurt people's feelings.
2688 bfd = bind_port_helper(config);
2691 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
2693 if (!accept_connection(csp, bfd))
2695 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
2708 log_error(LOG_LEVEL_CONNECT, "OK");
2711 #ifdef FEATURE_TOGGLE
2712 if (global_toggle_state)
2714 csp->flags |= CSP_FLAG_TOGGLED_ON;
2716 #endif /* def FEATURE_TOGGLE */
2718 if (run_loader(csp))
2720 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
2721 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2725 if (block_acl(NULL,csp))
2727 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
2728 close_socket(csp->cfd);
2732 #endif /* def FEATURE_ACL */
2734 /* add it to the list of clients */
2735 csp->next = clients->next;
2736 clients->next = csp;
2738 if (config->multi_threaded)
2742 /* this is a switch () statment in the C preprocessor - ugh */
2743 #undef SELECTED_ONE_OPTION
2745 /* Use Pthreads in preference to native code */
2746 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
2747 #define SELECTED_ONE_OPTION
2749 pthread_t the_thread;
2750 pthread_attr_t attrs;
2752 pthread_attr_init(&attrs);
2753 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
2754 errno = pthread_create(&the_thread, &attrs,
2755 (void * (*)(void *))serve, csp);
2756 child_id = errno ? -1 : 0;
2757 pthread_attr_destroy(&attrs);
2761 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
2762 #define SELECTED_ONE_OPTION
2763 child_id = _beginthread(
2764 (void (*)(void *))serve,
2769 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
2770 #define SELECTED_ONE_OPTION
2771 child_id = _beginthread(
2772 (void(* _Optlink)(void*))serve,
2778 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
2779 #define SELECTED_ONE_OPTION
2781 thread_id tid = spawn_thread
2782 (server_thread, "server", B_NORMAL_PRIORITY, csp);
2784 if ((tid >= 0) && (resume_thread(tid) == B_OK))
2786 child_id = (int) tid;
2795 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2796 #define SELECTED_ONE_OPTION
2797 csp->cfd = ReleaseSocket(csp->cfd, -1);
2800 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
2801 NP_Output, Output(),
2802 NP_CloseOutput, FALSE,
2803 NP_Name, (ULONG)"privoxy child",
2807 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
2808 NP_Output, Output(),
2809 NP_CloseOutput, FALSE,
2810 NP_Name, (ULONG)"privoxy child",
2811 NP_StackSize, 200*1024,
2817 ((struct Task *)child_id)->tc_UserData = csp;
2818 Signal((struct Task *)child_id, SIGF_SINGLE);
2823 #if !defined(SELECTED_ONE_OPTION)
2826 /* This block is only needed when using fork().
2827 * When using threads, the server thread was
2828 * created and run by the call to _beginthread().
2830 if (child_id == 0) /* child */
2833 #ifdef FEATURE_TOGGLE
2834 int inherited_toggle_state = global_toggle_state;
2835 #endif /* def FEATURE_TOGGLE */
2840 * If we've been toggled or we've blocked the request, tell Mom
2843 #ifdef FEATURE_TOGGLE
2844 if (inherited_toggle_state != global_toggle_state)
2846 rc |= RC_FLAG_TOGGLED;
2848 #endif /* def FEATURE_TOGGLE */
2850 #ifdef FEATURE_STATISTICS
2851 if (csp->flags & CSP_FLAG_REJECTED)
2853 rc |= RC_FLAG_BLOCKED;
2855 #endif /* ndef FEATURE_STATISTICS */
2859 else if (child_id > 0) /* parent */
2861 /* in a fork()'d environment, the parent's
2862 * copy of the client socket and the CSP
2866 #if !defined(_WIN32) && !defined(__CYGWIN__)
2868 wait( &child_status );
2871 * Evaluate child's return code: If the child has
2872 * - been toggled, toggle ourselves
2873 * - blocked its request, bump up the stats counter
2876 #ifdef FEATURE_TOGGLE
2877 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
2879 global_toggle_state = !global_toggle_state;
2881 #endif /* def FEATURE_TOGGLE */
2883 #ifdef FEATURE_STATISTICS
2885 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
2889 #endif /* def FEATURE_STATISTICS */
2891 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
2892 close_socket(csp->cfd);
2893 csp->flags &= ~CSP_FLAG_ACTIVE;
2897 #undef SELECTED_ONE_OPTION
2898 /* end of cpp switch () */
2900 if (child_id < 0) /* failed */
2902 char buf[BUFFER_SIZE];
2904 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
2906 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
2908 write_socket(csp->cfd, buf, strlen(buf));
2909 close_socket(csp->cfd);
2910 csp->flags &= ~CSP_FLAG_ACTIVE;
2921 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
2923 /* Clean up. Aim: free all memory (no leaks) */
2924 #ifdef FEATURE_GRACEFUL_TERMINATION
2926 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
2928 unload_current_config_file();
2929 unload_current_actions_file();
2930 unload_current_re_filterfile();
2931 #ifdef FEATURE_TRUST
2932 unload_current_trust_file();
2935 if (config->multi_threaded)
2942 } while ((clients->next != NULL) && (--i > 0));
2946 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
2957 #ifdef FEATURE_COOKIE_JAR
2958 if (NULL != config->jar)
2960 fclose(config->jar);
2964 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
2965 /* Cleanup - remove taskbar icon etc. */
2970 #endif /* FEATURE_GRACEFUL_TERMINATION */