1 const char jcc_rcs[] = "$Id: jcc.c,v 1.114 2006/12/27 18:52:02 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 1.114 2006/12/27 18:52:02 fabiankeil
37 * Fix -pedantic ISO C warning about converting
38 * from function pointer to object pointer.
40 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
41 * Silence compiler warning I introduced with my last commit.
43 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
44 * Mutex protect rand() if POSIX threading
45 * is used, warn the user if that's not possible
46 * and stop using it on _WIN32 where it could
49 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
50 * Don't prevent core dumps by catching SIGABRT.
51 * It's rude and makes debugging unreasonable painful.
53 * Revision 1.110 2006/12/13 14:52:53 etresoft
54 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
56 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
57 * Privoxy is now able to run as intercepting
58 * proxy in combination with any packet filter
59 * that does the port redirection. The destination
60 * is extracted from the "Host:" header which
61 * should be available for nearly all requests.
63 * Moved HTTP snipplets into jcc.c.
64 * Added error message for gopher proxy requests.
66 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
67 * Only unlink the pidfile if it's actually used.
69 * Change order of interception checks to make
70 * it possible to block or redirect requests for
73 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
74 * Make pthread mutex locking more generic. Instead of
75 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
76 * and use mutex locking unless there is an _r function
77 * available. Better safe than sorry.
79 * Fixes "./configure --disable-pthread" and should result
80 * in less threading-related problems on pthread-using platforms,
81 * but it still doesn't fix BR#1122404.
83 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
84 * Move pthread.h inclusion from jcc.c to jcc.h.
85 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
87 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
88 * Don't exit after receiving the second SIGHUP on Solaris.
90 * Fixes BR 1052235, but the same problem may exist on other
91 * systems. Once 3.0.6 is out we should use sigset()
92 * where available and see if it breaks anything.
94 * Revision 1.104 2006/09/23 13:26:38 roro
95 * Replace TABs by spaces in source code.
97 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
98 * Fix +redirect{}. Didn't work with -fast-redirects.
100 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
101 * Respond with 400 and a short text message
102 * if the client tries to use Privoxy as FTP proxy.
104 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
105 * Make number of retries in case of forwarded-connect problems
106 * a config file option (forwarded-connect-retries) and use 0 as
109 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
110 * Set random(3) seed.
112 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
113 * Follow the OpenBSD port's lead and protect the resolve
114 * functions on OpenBSD as well.
116 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
117 * --user fix. Only use the user as group if no group is specified.
118 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
120 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
121 * Windows service (re-)integration
125 * --install[:service_name]
126 * --uninstall[:service_name]
129 * They work as follows:
130 * --install will create a service for you and then terminate.
131 * By default the service name will be "privoxy" (without the quotes).
132 * However you can run multiple services if you wish, just by adding
133 * a colon and then a name (no spaces).
135 * --uninstall follows the exact same rules a --install.
137 * --service is used when the program is executed by the service
138 * control manager, and in normal circumstances would never be
139 * used as a command line argument.
141 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
142 * Windows service integration
144 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
145 * Incorporate Fabian Keil's patch work:
146 http://www.fabiankeil.de/sourcecode/privoxy/
148 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
149 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
150 * with what was really the latest development (the v_3_0_branch branch)
152 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
153 * Thanks to Jindrich Makovicka for a race condition fix for the log
154 * file. The race condition remains for non-pthread implementations.
155 * Reference patch #1175720.
157 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
158 * Add the ability to check jpeg images for invalid
159 * lengths of comment blocks. Defensive strategy
160 * against the exploit:
161 * Microsoft Security Bulletin MS04-028
162 * Buffer Overrun in JPEG Processing (GDI+) Could
163 * Allow Code Execution (833987)
164 * Enabled with +inspect-jpegs in actions files.
166 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
167 * - Fixed usage info for non-unix platforms
168 * - Fixed small cmdline parsing bug
170 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
171 * Diagnostics: Now preserve the returncode of pthread_create
172 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
174 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
175 * No longer ignore SIGCHLD. Fixes bug #769381
177 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
178 * Close jarfile on graceful exit, remove stray line
180 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
181 * Cosmetics: Killed a warning, a typo and an allocation left at exit
183 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
184 * No longer rely on non-POSIX.1 extensions of getcwd().
187 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
188 * Replaced setenv() by posix-compliant putenv()
189 * Thanks to Neil McCalden (nmcc AT users.sf.net).
191 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
192 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
194 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
195 * Clean-up and extension of improvements for forked mode:
196 * - Child's return code now consists of flags RC_FLAG_*
197 * - Reporting toggle to parent now properly #ifdef'ed
198 * - Children now report blocking to parent. This enables
199 * statistics in forked mode
201 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
202 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
203 * Children now report having been toggled through _exit(17), parents
204 * watch for that code and toggle themselves if found.
206 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
207 * Wrapping all *_r functions (the non-_r versions of them) with
208 * mutex semaphores for OSX. Hopefully this will take care of all
209 * of those pesky crash reports.
211 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
212 * Fixed two mostly harmless mem leaks
214 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
215 * Fix: Head of global clients list now initialized to NULL
217 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
218 * Added basic support for OPTIONS and TRACE HTTP methods:
219 * - New interceptor direct_response() added in chat().
220 * - sed() moved to earlier in the process, so that the
221 * Host: header is evaluated before actions and forwarding
224 * Revision 1.92 2002/05/08 16:00:46 oes
225 * Chat's buffer handling:
226 * - Fixed bug with unchecked out-of-mem conditions
227 * while reading client request & server headers
228 * - No longer predict if the buffer limit will be exceeded
229 * in the next read -- check add_to_iob's new
230 * return code. If buffer couldn't be extended
231 * (policy or out-of-mem) while
232 * - reading from client: abort
233 * - reading server headers: send error page
234 * - buffering server body for filter: flush,
235 * and if that fails: send error page
237 * Revision 1.91 2002/04/08 20:35:58 swa
240 * Revision 1.90 2002/04/02 14:57:28 oes
241 * Made sending wafers independent of FEATURE_COOKIE_JAR
243 * Revision 1.89 2002/03/31 17:18:59 jongfoster
244 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
246 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
247 * More compiler warning message maintenance
249 * Revision 1.87 2002/03/26 22:29:54 swa
250 * we have a new homepage!
252 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
253 * Workaround for closing the jarfile before load_config() comes around again
255 * Revision 1.85 2002/03/24 15:23:33 jongfoster
258 * Revision 1.84 2002/03/24 13:25:43 swa
259 * name change related issues
261 * Revision 1.83 2002/03/16 23:54:06 jongfoster
262 * Adding graceful termination feature, to help look for memory leaks.
263 * If you enable this (which, by design, has to be done by hand
264 * editing config.h) and then go to http://i.j.b/die, then the program
265 * will exit cleanly after the *next* request. It should free all the
266 * memory that was used.
268 * Revision 1.82 2002/03/13 00:27:05 jongfoster
271 * Revision 1.81 2002/03/12 01:42:50 oes
272 * Introduced modular filters
274 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
275 * OS/2 port maintenance:
276 * - Fixed EMX build - it had decayed a little
277 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
278 * substituted a memset for now.
280 * Revision 1.79 2002/03/09 20:03:52 jongfoster
281 * - Making various functions return int rather than size_t.
282 * (Undoing a recent change). Since size_t is unsigned on
283 * Windows, functions like read_socket that return -1 on
284 * error cannot return a size_t.
286 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
287 * crashes, and also frequently caused JB to jump to 100%
288 * CPU and stay there. (Because it thought it had just
289 * read ((unsigned)-1) == 4Gb of data...)
291 * - The signature of write_socket has changed, it now simply
292 * returns success=0/failure=nonzero.
294 * - Trying to get rid of a few warnings --with-debug on
295 * Windows, I've introduced a new type "jb_socket". This is
296 * used for the socket file descriptors. On Windows, this
297 * is SOCKET (a typedef for unsigned). Everywhere else, it's
298 * an int. The error value can't be -1 any more, so it's
299 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
300 * Windows it maps to the #define INVALID_SOCKET.)
302 * - The signature of bind_port has changed.
304 * Revision 1.78 2002/03/08 21:35:04 oes
305 * Added optional group supplement to --user option. Will now use default group of user if no group given
307 * Revision 1.77 2002/03/07 03:52:06 oes
308 * - Fixed compiler warnings etc
309 * - Improved handling of failed DNS lookups
311 * Revision 1.76 2002/03/06 22:54:35 jongfoster
312 * Automated function-comment nitpicking.
314 * Revision 1.75 2002/03/06 10:02:19 oes
315 * Fixed stupid bug when --user was not given
317 * Revision 1.74 2002/03/06 00:49:31 jongfoster
318 * Fixing warning on Windows
319 * Making #ifdefs that refer to the same variable consistently
320 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
322 * Revision 1.73 2002/03/05 23:57:30 hal9
323 * Stray character 's' on line 1618 was breaking build.
325 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
326 * - Re-enable OS/2 building after new parms were added
327 * - Fix false out of memory report when resolving CGI templates when no IP
328 * address is available of failed attempt (a la no such domain)
330 * Revision 1.71 2002/03/05 18:13:56 oes
331 * Added --user option
333 * Revision 1.70 2002/03/05 04:52:42 oes
334 * Deleted non-errlog debugging code
336 * Revision 1.69 2002/03/04 23:50:00 jongfoster
337 * Splitting off bind_port() call into bind_port_helper(), with
340 * Revision 1.68 2002/03/04 20:17:32 oes
343 * Revision 1.67 2002/03/04 18:18:57 oes
344 * - Removed _DEBUG mode
345 * - Cleand up cmdline parsing
346 * - Introduced --no-daemon, --pidfile options
347 * - Cleaned up signal handling:
348 * - Terminate cleanly on INT, TERM and ABRT
349 * - Schedule logfile for re-opening on HUP
350 * - Ignore CHLD and PIPE
351 * - Leave the rest with their default handlers
352 * - Uniform handler registration
353 * - Added usage() function
354 * - Played styleguide police
356 * Revision 1.66 2002/03/03 15:06:55 oes
357 * Re-enabled automatic config reloading
359 * Revision 1.65 2002/03/03 14:49:11 oes
360 * Fixed CLF logging: Now uses client's original HTTP request
362 * Revision 1.64 2002/03/03 09:18:03 joergs
363 * Made jumbjuster work on AmigaOS again.
365 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
366 * Clean up a little CRLF unpleasantness that suddenly appeared
368 * Revision 1.62 2002/02/20 23:17:23 jongfoster
369 * Detecting some out-of memory conditions and exiting with a log message.
371 * Revision 1.61 2002/01/17 21:01:52 jongfoster
372 * Moving all our URL and URL pattern parsing code to urlmatch.c.
374 * Revision 1.60 2001/12/30 14:07:32 steudten
375 * - Add signal handling (unix)
376 * - Add SIGHUP handler (unix)
377 * - Add creation of pidfile (unix)
378 * - Add action 'top' in rc file (RH)
379 * - Add entry 'SIGNALS' to manpage
380 * - Add exit message to logfile (unix)
382 * Revision 1.59 2001/12/13 14:07:18 oes
383 * Fixed Bug: 503 error page now sent OK
385 * Revision 1.58 2001/11/30 23:37:24 jongfoster
386 * Renaming the Win32 config file to config.txt - this is almost the
387 * same as the corresponding UNIX name "config"
389 * Revision 1.57 2001/11/16 00:47:43 jongfoster
390 * Changing the tty-disconnection code to use setsid().
392 * Revision 1.56 2001/11/13 20:20:54 jongfoster
393 * Tabs->spaces, fixing a bug with missing {} around an if()
395 * Revision 1.55 2001/11/13 20:14:53 jongfoster
396 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
398 * Revision 1.54 2001/11/07 00:03:14 steudten
399 * Give reliable return value if an error
400 * occurs not just 0 with new daemon mode.
402 * Revision 1.53 2001/11/05 21:41:43 steudten
403 * Add changes to be a real daemon just for unix os.
404 * (change cwd to /, detach from controlling tty, set
405 * process group and session leader to the own process.
407 * Add some fatal-error log message for failed malloc().
408 * Add '-d' if compiled with 'configure --with-debug' to
409 * enable debug output.
411 * Revision 1.52 2001/10/26 20:11:20 jongfoster
412 * Fixing type mismatch
414 * Revision 1.51 2001/10/26 17:38:28 oes
417 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
418 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
419 * threads to call select() simultaneously. So, it's time to do a real, live,
420 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
421 * (native). Both versions will work, but using __OS2__ offers multi-threading.
423 * Revision 1.49 2001/10/23 21:41:35 jongfoster
424 * Added call to initialize the (statically-allocated of course)
425 * "out of memory" CGI response.
427 * Revision 1.48 2001/10/10 19:56:46 jongfoster
428 * Moving some code that wasn't cookie-related out of an #ifdef
431 * Revision 1.47 2001/10/10 16:44:36 oes
432 * Added CONNECT destination port limitation check
434 * Revision 1.46 2001/10/08 15:17:41 oes
435 * Re-enabled SSL forwarding
437 * Revision 1.45 2001/10/07 15:42:11 oes
438 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
440 * Moved downgrading of the HTTP version from parse_http_request to
441 * chat(), since we can't decide if it is necessary before we have
442 * determined the actions for the URL. The HTTP command is now
443 * *always* re-built so the repairs need no longer be special-cased.
445 * filter_popups now gets a csp pointer so it can raise the new
446 * CSP_FLAG_MODIFIED flag.
450 * Added configurable size limit for the IOB. If the IOB grows so
451 * large that the next read would exceed the limit, the header
452 * is generated, and the header & unfiltered buffer are flushed
453 * to the client. Chat then continues in non-buffering,
454 * non-filtering body mode.
456 * Revision 1.44 2001/10/02 18:13:57 oes
459 * Revision 1.43 2001/10/02 15:32:13 oes
460 * Moved generation of hdr
462 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
463 * Cleaning up 2 compiler warnings on OS/2.
465 * Revision 1.41 2001/09/16 17:05:14 jongfoster
466 * Removing unused #include showarg.h
468 * Revision 1.40 2001/09/16 15:41:45 jongfoster
469 * Fixing signed/unsigned comparison warning.
471 * Revision 1.39 2001/09/16 13:21:27 jongfoster
472 * Changes to use new list functions.
474 * Revision 1.38 2001/09/16 13:01:46 jongfoster
475 * Removing redundant function call that zeroed zalloc()'d memory.
477 * Revision 1.37 2001/09/10 11:12:24 oes
478 * Deleted unused variable
480 * Revision 1.36 2001/09/10 10:56:15 oes
481 * Silenced compiler warnings
483 * Revision 1.35 2001/07/31 14:44:22 oes
484 * Deleted unused size parameter from filter_popups()
486 * Revision 1.34 2001/07/30 22:08:36 jongfoster
487 * Tidying up #defines:
488 * - All feature #defines are now of the form FEATURE_xxx
489 * - Permanently turned off WIN_GUI_EDIT
490 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
492 * Revision 1.33 2001/07/29 19:32:00 jongfoster
493 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
495 * Revision 1.32 2001/07/29 18:47:05 jongfoster
496 * Adding missing #include "loadcfg.h"
498 * Revision 1.31 2001/07/29 12:17:48 oes
499 * Applied pthread fix by Paul Lieverse
501 * Revision 1.30 2001/07/25 22:57:13 jongfoster
502 * __BEOS__ no longer overrides FEATURE_PTHREAD.
503 * This is because FEATURE_PTHREAD will soon be widely used, so I
504 * want to keep it simple.
506 * Revision 1.29 2001/07/24 12:47:06 oes
507 * Applied BeOS support update by Eugenia
509 * Revision 1.28 2001/07/23 13:26:12 oes
510 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
512 * Revision 1.27 2001/07/19 19:09:47 haroon
513 * - Added code to take care of the situation where while processing the first
514 * server response (which includes the server header), after finding the end
515 * of the headers we were not looking past the end of the headers for
516 * content modification. I enabled it for filter_popups.
517 * Someone else should look to see if other similar operations should be
518 * done to the discarded portion of the buffer.
520 * Note 2001/07/20: No, the other content modification mechanisms will process
521 * the whole iob later anyway. --oes
523 * Revision 1.26 2001/07/18 12:31:36 oes
526 * Revision 1.25 2001/07/15 19:43:49 jongfoster
527 * Supports POSIX threads.
528 * Also removed some unused #includes.
530 * Revision 1.24 2001/07/13 14:00:40 oes
531 * - Generic content modification scheme:
532 * Each feature has its own applicability flag that is set
533 * from csp->action->flags.
534 * Replaced the "filtering" int flag , by a function pointer
535 * "content_filter" to the function that will do the content
536 * modification. If it is != NULL, the document will be buffered
537 * and processed through *content_filter, which must set
538 * csp->content_length and return a modified copy of the body
539 * or return NULL (on failiure).
540 * - Changed csp->is_text to the more generic bitmap csp->content_type
541 * which can currently take the valued CT_TEXT or CT_GIF
543 * - Removed all #ifdef PCRS
545 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
546 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
547 * the `block_acl' call. This prevents a compilation error when the user
548 * does not wish to use the "ACL" feature.
550 * Revision 1.22 2001/06/29 21:45:41 oes
551 * Indentation, CRLF->LF, Tab-> Space
553 * Revision 1.21 2001/06/29 13:29:36 oes
554 * - Cleaned up, improved comments
555 * - Unified all possible interceptors (CGI,
556 * block, trust, fast_redirect) in one
557 * place, with one (CGI) answer generation
558 * mechansim. Much clearer now.
559 * - Removed the GIF image generation, which
560 * is now done in filters.c:block_url()
561 * - Made error conditions like domain lookup
562 * failiure or (various) problems while talking
563 * to the server use cgi.c:error_response()
564 * instead of generating HTML/HTTP in chat() (yuck!)
565 * - Removed logentry from cancelled commit
567 * Revision 1.20 2001/06/09 10:55:28 jongfoster
568 * Changing BUFSIZ ==> BUFFER_SIZE
570 * Revision 1.19 2001/06/07 23:12:52 jongfoster
571 * Replacing function pointer in struct gateway with a directly
572 * called function forwarded_connect().
573 * Replacing struct gateway with struct forward_spec
575 * Revision 1.18 2001/06/03 19:12:16 oes
576 * introduced new cgi handling
578 * Revision 1.17 2001/06/01 20:07:23 jongfoster
579 * Now uses action +image-blocker{} rather than config->tinygif
581 * Revision 1.16 2001/06/01 18:49:17 jongfoster
582 * Replaced "list_share" with "list" - the tiny memory gain was not
583 * worth the extra complexity.
585 * Revision 1.15 2001/05/31 21:24:47 jongfoster
586 * Changed "permission" to "action" throughout.
587 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
588 * Moved vanilla wafer check into chat(), since we must now
589 * decide whether or not to add it based on the URL.
591 * Revision 1.14 2001/05/29 20:14:01 joergs
592 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
595 * Revision 1.13 2001/05/29 09:50:24 jongfoster
596 * Unified blocklist/imagelist/permissionslist.
597 * File format is still under discussion, but the internal changes
600 * Also modified interceptor behaviour:
601 * - We now intercept all URLs beginning with one of the following
602 * prefixes (and *only* these prefixes):
604 * * http://ijbswa.sf.net/config/
605 * * http://ijbswa.sourceforge.net/config/
606 * - New interceptors "home page" - go to http://i.j.b/ to see it.
607 * - Internal changes so that intercepted and fast redirect pages
608 * are not replaced with an image.
609 * - Interceptors now have the option to send a binary page direct
610 * to the client. (i.e. ijb-send-banner uses this)
611 * - Implemented show-url-info interceptor. (Which is why I needed
612 * the above interceptors changes - a typical URL is
613 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
614 * The previous mechanism would not have intercepted that, and
615 * if it had been intercepted then it then it would have replaced
618 * Revision 1.12 2001/05/27 22:17:04 oes
620 * - re_process_buffer no longer writes the modified buffer
621 * to the client, which was very ugly. It now returns the
622 * buffer, which it is then written by chat.
624 * - content_length now adjusts the Content-Length: header
625 * for modified documents rather than crunch()ing it.
626 * (Length info in csp->content_length, which is 0 for
627 * unmodified documents)
629 * - For this to work, sed() is called twice when filtering.
631 * Revision 1.11 2001/05/26 17:27:53 jongfoster
632 * Added support for CLF and fixed LOG_LEVEL_LOG.
633 * Also did CRLF->LF fix of my previous patch.
635 * Revision 1.10 2001/05/26 15:26:15 jongfoster
636 * ACL feature now provides more security by immediately dropping
637 * connections from untrusted hosts.
639 * Revision 1.9 2001/05/26 00:28:36 jongfoster
640 * Automatic reloading of config file.
641 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
642 * Most of the global variables have been moved to a new
643 * struct configuration_spec, accessed through csp->config->globalname
644 * Most of the globals remaining are used by the Win32 GUI.
646 * Revision 1.8 2001/05/25 22:43:18 jongfoster
647 * Fixing minor memory leak and buffer overflow.
649 * Revision 1.7 2001/05/25 22:34:30 jongfoster
652 * Revision 1.6 2001/05/23 00:13:58 joergs
653 * AmigaOS support fixed.
655 * Revision 1.5 2001/05/22 18:46:04 oes
657 * - Enabled filtering banners by size rather than URL
658 * by adding patterns that replace all standard banner
659 * sizes with the "Junkbuster" gif to the re_filterfile
661 * - Enabled filtering WebBugs by providing a pattern
662 * which kills all 1x1 images
664 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
665 * which is selected by the (nonstandard and therefore
666 * capital) letter 'U' in the option string.
667 * It causes the quantifiers to be ungreedy by default.
668 * Appending a ? turns back to greedy (!).
670 * - Added a new interceptor ijb-send-banner, which
671 * sends back the "Junkbuster" gif. Without imagelist or
672 * MSIE detection support, or if tinygif = 1, or the
673 * URL isn't recognized as an imageurl, a lame HTML
674 * explanation is sent instead.
676 * - Added new feature, which permits blocking remote
677 * script redirects and firing back a local redirect
679 * The feature is conditionally compiled, i.e. it
680 * can be disabled with --disable-fast-redirects,
681 * plus it must be activated by a "fast-redirects"
682 * line in the config file, has its own log level
683 * and of course wants to be displayed by show-proxy-args
684 * Note: Boy, all the #ifdefs in 1001 locations and
685 * all the fumbling with configure.in and acconfig.h
686 * were *way* more work than the feature itself :-(
688 * - Because a generic redirect template was needed for
689 * this, tinygif = 3 now uses the same.
691 * - Moved GIFs, and other static HTTP response templates
696 * - Removed some >400 CRs again (Jon, you really worked
699 * Revision 1.4 2001/05/21 19:34:01 jongfoster
700 * Made failure to bind() a fatal error.
702 * Revision 1.3 2001/05/20 01:21:20 jongfoster
703 * Version 2.9.4 checkin.
704 * - Merged popupfile and cookiefile, and added control over PCRS
705 * filtering, in new "permissionsfile".
706 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
707 * file error you now get a message box (in the Win32 GUI) rather
708 * than the program exiting with no explanation.
709 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
711 * - Removed tabs from "config"
712 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
713 * - Bumped up version number.
715 * Revision 1.2 2001/05/17 22:34:44 oes
716 * - Added hint on GIF char array generation to jcc.c
717 * - Cleaned CRLF's from the sources and related files
718 * - Repaired logging for REF and FRC
720 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
721 * Initial import of version 2.9.3 source tree
724 *********************************************************************/
730 #include <sys/types.h>
738 # ifndef FEATURE_PTHREAD
742 # include <windows.h>
743 # include <process.h>
744 # endif /* ndef FEATURE_PTHREAD */
747 # ifndef _WIN_CONSOLE
749 # endif /* ndef _WIN_CONSOLE */
750 # include "w32svrapi.h"
752 #else /* ifndef _WIN32 */
754 # if !defined (__OS2__)
756 # include <sys/wait.h>
757 # endif /* ndef __OS2__ */
758 # include <sys/time.h>
759 # include <sys/stat.h>
760 # include <sys/ioctl.h>
763 #include <sys/termios.h>
774 # include <socket.h> /* BeOS has select() for sockets only. */
775 # include <OS.h> /* declarations for threads and stuff. */
778 # if defined(__EMX__) || defined(__OS2__)
779 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
784 #define bzero(B,N) memset(B,0x00,n)
799 #include "killpopup.h"
800 #include "miscutil.h"
802 #include "jbsockets.h"
807 #include "urlmatch.h"
809 const char jcc_h_rcs[] = JCC_H_VERSION;
810 const char project_h_rcs[] = PROJECT_H_VERSION;
813 struct client_state clients[1];
814 struct file_list files[1];
816 #ifdef FEATURE_STATISTICS
817 int urls_read = 0; /* total nr of urls read inc rejected */
818 int urls_rejected = 0; /* total nr of urls rejected */
819 #endif /* def FEATURE_STATISTICS */
821 #ifdef FEATURE_GRACEFUL_TERMINATION
825 static void listen_loop(void);
826 static void chat(struct client_state *csp);
828 void serve(struct client_state *csp);
829 #else /* ifndef AMIGA */
830 static void serve(struct client_state *csp);
831 #endif /* def AMIGA */
834 static int32 server_thread(void *data);
835 #endif /* def __BEOS__ */
838 #define sleep(N) Sleep(((N) * 1000))
842 #define sleep(N) DosSleep(((N) * 100))
845 #ifdef FEATURE_PTHREAD
846 pthread_mutex_t log_mutex;
847 pthread_mutex_t log_init_mutex;
849 #ifndef HAVE_GMTIME_R
850 pthread_mutex_t gmtime_mutex;
851 #endif /* ndef HAVE_GMTIME_R */
853 #ifndef HAVE_LOCALTIME_R
854 pthread_mutex_t localtime_mutex;
855 #endif /* ndef HAVE_GMTIME_R */
857 #ifndef HAVE_GETHOSTBYADDR_R
858 pthread_mutex_t gethostbyaddr_mutex;
859 #endif /* ndef HAVE_GETHOSTBYADDR_R */
861 #ifndef HAVE_GETHOSTBYNAME_R
862 pthread_mutex_t gethostbyname_mutex;
863 #endif /* ndef HAVE_GETHOSTBYNAME_R */
866 pthread_mutex_t rand_mutex;
867 #endif /* ndef HAVE_RANDOM */
869 #endif /* FEATURE_PTHREAD */
871 #if defined(unix) || defined(__EMX__)
872 const char *basedir = NULL;
873 const char *pidfile = NULL;
874 int received_hup_signal = 0;
875 #endif /* defined unix */
877 /* The vanilla wafer. */
878 static const char VANILLA_WAFER[] =
879 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
880 "Do_not_send_me_any_copyrighted_information_other_than_the_"
881 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
882 "In_particular_do_not_send_me_any_cookies_that_"
883 "are_subject_to_a_claim_of_copyright_by_anybody._"
884 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
885 "(copyright_or_otherwise)_applying_to_any_cookie._";
887 /* HTTP snipplets. */
888 const char CSUCCEED[] =
889 "HTTP/1.0 200 Connection established\n"
890 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
892 const char CHEADER[] =
893 "HTTP/1.0 400 Invalid header received from browser\r\n"
894 "Connection: close\r\n\r\n"
895 "Invalid header received from browser.";
897 const char CFORBIDDEN[] =
898 "HTTP/1.0 403 Connection not allowable\r\n"
899 "X-Hint: If you read this message interactively, then you know why this happens ,-)\r\n"
900 "Connection: close\r\n\r\n";
902 const char FTP_RESPONSE[] =
903 "HTTP/1.0 400 Invalid request received from browser\r\n"
904 "Connection: close\r\n\r\n"
905 "Invalid request. Privoxy doesn't support FTP.\r\n";
907 const char GOPHER_RESPONSE[] =
908 "HTTP/1.0 400 Invalid request received from browser\r\n"
909 "Connection: close\r\n\r\n"
910 "Invalid request. Privoxy doesn't support gopher.\r\n";
912 const char MISSING_DESTINATION_RESPONSE[] =
913 "HTTP/1.0 400 Bad request received from browser\r\n"
914 "Connection: close\r\n\r\n"
915 "Bad request. Privoxy was unable to extract the destination.\r\n";
918 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
919 /*********************************************************************
921 * Function : sig_handler
923 * Description : Signal handler for different signals.
924 * Exit gracefully on TERM and INT
925 * or set a flag that will cause the errlog
926 * to be reopened by the main thread on HUP.
929 * 1 : the_signal = the signal cause this function to call
933 *********************************************************************/
934 static void sig_handler(int the_signal)
940 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
951 received_hup_signal = 1;
956 * We shouldn't be here, unless we catch signals
957 * in main() that we can't handle here!
959 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
967 /*********************************************************************
971 * Description : Once a connection to the client has been accepted,
972 * this function is called (via serve()) to handle the
973 * main business of the communication. When this
974 * function returns, the caller must close the client
978 * 1 : csp = Current client state (buffers, headers, etc...)
980 * Returns : On success, the number of bytes written are returned (zero
981 * indicates nothing was written). On error, -1 is returned,
982 * and errno is set appropriately. If count is zero and the
983 * file descriptor refers to a regular file, 0 will be
984 * returned without causing any other effect. For a special
985 * file, the results are not portable.
987 *********************************************************************/
988 static void chat(struct client_state *csp)
991 * This next lines are a little ugly, but they simplifies the if statements
992 * below. Basically if TOGGLE, then we want the if to test if the
993 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
994 * then we want the if to test for CSP_FLAG_FORCED , else we don't
996 #ifdef FEATURE_TOGGLE
997 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
998 #else /* ifndef FEATURE_TOGGLE */
999 # define IS_TOGGLED_ON_AND
1000 #endif /* ndef FEATURE_TOGGLE */
1001 #ifdef FEATURE_FORCE_LOAD
1002 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
1003 #else /* ifndef FEATURE_FORCE_LOAD */
1004 # define IS_NOT_FORCED_AND
1005 #endif /* def FEATURE_FORCE_LOAD */
1007 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
1009 char buf[BUFFER_SIZE];
1017 int ms_iis5_hack = 0;
1018 size_t byte_count = 0;
1019 int forwarded_connect_retries = 0;
1020 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
1021 const struct forward_spec * fwd;
1022 struct http_request *http;
1023 size_t len; /* for buffer sizes */
1024 #ifdef FEATURE_KILL_POPUPS
1025 int block_popups; /* bool, 1==will block popups */
1026 int block_popups_now = 0; /* bool, 1==currently blocking popups */
1027 #endif /* def FEATURE_KILL_POPUPS */
1029 int pcrs_filter; /* bool, 1==will filter through pcrs */
1030 int gif_deanimate; /* bool, 1==will deanimate gifs */
1031 int jpeg_inspect; /* bool, 1==will inspect jpegs */
1033 /* Function that does the content filtering for the current request */
1034 char *(*content_filter)() = NULL;
1036 /* Skeleton for HTTP response, if we should intercept the request */
1037 struct http_response *rsp;
1039 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1040 struct list header_list;
1041 struct list *headers = &header_list;
1046 * Read the client's request. Note that since we're not using select() we
1047 * could get blocked here if a client connected, then didn't say anything!
1052 len = read_socket(csp->cfd, buf, sizeof(buf));
1054 if (len <= 0) break; /* error! */
1057 * If there is no memory left for buffering the
1058 * request, there is nothing we can do but hang up
1060 if (add_to_iob(csp, buf, len))
1065 req = get_header(csp);
1069 break; /* no HTTP request! */
1074 continue; /* more to come! */
1078 * If it's a FTP or gopher request, we don't support it.
1080 * These checks are better than nothing, but they might
1081 * not work in all configurations and some clients might
1082 * have problems digesting the answer.
1084 * They should, however, never cause more problems than
1085 * Privoxy's old behaviour (returning the misleading HTML error message:
1086 * "Could not resolve http://(ftp|gopher)://example.org").
1088 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1090 if (!strncmpic(req, "GET ftp://", 10))
1092 strcpy(buf, FTP_RESPONSE);
1093 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as FTP proxy: %s",
1094 csp->ip_addr_str, req);
1098 strcpy(buf, GOPHER_RESPONSE);
1099 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as gopher proxy: %s",
1100 csp->ip_addr_str, req);
1102 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1104 write_socket(csp->cfd, buf, strlen(buf));
1105 free_http_request(http);
1109 #ifdef FEATURE_FORCE_LOAD
1110 /* If this request contains the FORCE_PREFIX,
1111 * better get rid of it now and set the force flag --oes
1114 if (strstr(req, FORCE_PREFIX))
1116 strclean(req, FORCE_PREFIX);
1117 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
1118 csp->flags |= CSP_FLAG_FORCED;
1121 #endif /* def FEATURE_FORCE_LOAD */
1123 switch( parse_http_request(req, http, csp) )
1126 log_error(LOG_LEVEL_ERROR, "Out of memory while parsing request.");
1129 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", req);
1137 if (http->cmd == NULL)
1139 strcpy(buf, CHEADER);
1140 write_socket(csp->cfd, buf, strlen(buf));
1142 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
1144 free_http_request(http);
1148 /* grab the rest of the client's headers */
1152 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1154 len = read_socket(csp->cfd, buf, sizeof(buf));
1157 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1162 * If there is no memory left for buffering the
1163 * request, there is nothing we can do but hang up
1165 if (add_to_iob(csp, buf, len))
1172 if (p == NULL) break;
1179 if (http->host == NULL)
1182 * Intercepted or invalid request without domain
1183 * inside the request line. Try to get it another way.
1185 if (JB_ERR_OK == get_destination_from_headers(headers, http))
1187 /* Split the domain we just got for pattern matching */
1188 init_domain_components(http);
1192 /* We can't work without destination. Go spread the news.*/
1194 req = list_to_text(headers);
1196 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, http->cmd);
1197 log_error(LOG_LEVEL_ERROR,
1198 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1199 csp->ip_addr_str, http->cmd, req);
1202 strcpy(buf, MISSING_DESTINATION_RESPONSE);
1203 write_socket(csp->cfd, buf, strlen(buf));
1204 free_http_request(http);
1205 destroy_list(headers);
1209 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1210 * to get the destination IP address, use it as host directly
1211 * or do a reverse DNS lookup first.
1215 /* decide how to route the HTTP request */
1217 if ((fwd = forward_url(http, csp)) == NULL)
1219 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1220 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1223 /* build the http request to send to the server
1224 * we have to do one of the following:
1226 * create = use the original HTTP request to create a new
1227 * HTTP request that has either the path component
1228 * without the http://domainspec (w/path) or the
1229 * full orininal URL (w/url)
1230 * Note that the path and/or the HTTP version may
1231 * have been altered by now.
1233 * connect = Open a socket to the host:port of the server
1234 * and short-circuit server and client socket.
1236 * pass = Pass the request unchanged if forwarding a CONNECT
1237 * request to a parent proxy. Note that we'll be sending
1238 * the CFAIL message ourselves if connecting to the parent
1239 * fails, but we won't send a CSUCCEED message if it works,
1240 * since that would result in a double message (ours and the
1241 * parent's). After sending the request to the parent, we simply
1244 * here's the matrix:
1247 * +--------+--------+
1249 * 0 | create | connect|
1251 * Forwarding +--------+--------+
1253 * 1 | create | pass |
1255 * +--------+--------+
1260 * Determine the actions for this URL
1262 #ifdef FEATURE_TOGGLE
1263 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1265 /* Most compatible set of actions (i.e. none) */
1266 init_current_action(csp->action);
1269 #endif /* ndef FEATURE_TOGGLE */
1271 url_actions(http, csp);
1276 * Check if a CONNECT request is allowable:
1277 * In the absence of a +limit-connect action, allow only port 443.
1278 * If there is an action, allow whatever matches the specificaton.
1282 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
1283 || (csp->action->flags & ACTION_LIMIT_CONNECT
1284 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
1286 if (csp->action->flags & ACTION_TREAT_FORBIDDEN_CONNECTS_LIKE_BLOCKS)
1288 /* The response will violate the specs, but makes unblocking easier. */
1289 log_error(LOG_LEVEL_ERROR, "Marking suspicious CONNECT request from %s for blocking.",
1291 csp->action->flags |= ACTION_BLOCK;
1296 strcpy(buf, CFORBIDDEN);
1297 write_socket(csp->cfd, buf, strlen(buf));
1298 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
1299 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
1307 * Downgrade http version from 1.1 to 1.0 if +downgrade
1310 if ( (http->ssl == 0)
1311 && (!strcmpic(http->ver, "HTTP/1.1"))
1312 && (csp->action->flags & ACTION_DOWNGRADE))
1315 http->ver = strdup("HTTP/1.0");
1317 if (http->ver == NULL)
1319 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1324 * Save a copy of the original request for logging
1326 http->ocmd = strdup(http->cmd);
1328 if (http->ocmd == NULL)
1330 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
1334 * (Re)build the HTTP request for non-SSL requests.
1335 * If forwarding, use the whole URL, else, use only the path.
1341 http->cmd = strdup(http->gpc);
1342 string_append(&http->cmd, " ");
1344 if (fwd->forward_host)
1346 string_append(&http->cmd, http->url);
1350 string_append(&http->cmd, http->path);
1352 string_append(&http->cmd, " ");
1353 string_append(&http->cmd, http->ver);
1355 if (http->cmd == NULL)
1357 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1359 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", http->cmd);
1361 enlist(csp->headers, http->cmd);
1363 /* Append the previously read headers */
1364 list_append_list_unique(csp->headers, headers);
1365 destroy_list(headers);
1368 * If the user has not supplied any wafers, and the user has not
1369 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1371 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1372 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1374 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1378 #ifdef FEATURE_KILL_POPUPS
1379 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
1380 #endif /* def FEATURE_KILL_POPUPS */
1382 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
1383 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
1385 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
1387 jpeg_inspect = ((csp->action->flags & ACTION_JPEG_INSPECT) != 0);
1390 * We have a request. Now, check to see if we need to
1391 * intercept it, i.e. If ..
1395 /* We may not forward the request by rfc2616 sect 14.31 */
1396 (NULL != (rsp = direct_response(csp)))
1398 /* or we are enabled and... */
1399 || (IS_ENABLED_AND (
1401 /* ..the request was blocked */
1402 ( NULL != (rsp = block_url(csp)))
1404 /* ..or untrusted */
1405 #ifdef FEATURE_TRUST
1406 || ( NULL != (rsp = trust_url(csp)))
1407 #endif /* def FEATURE_TRUST */
1409 /* ..or a redirect kicked in */
1410 || ( NULL != (rsp = redirect_url(csp)))
1414 * .. or a CGI call was detected and answered.
1416 * This check comes last to give the user the power
1417 * to deny acces to some (or all) of the cgi pages.
1419 || (NULL != (rsp = dispatch_cgi(csp)))
1423 /* Write the answer to the client */
1424 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1425 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1427 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1430 #ifdef FEATURE_STATISTICS
1431 /* Count as a rejected request */
1432 csp->flags |= CSP_FLAG_REJECTED;
1433 #endif /* def FEATURE_STATISTICS */
1435 /* Log (FIXME: All intercept reasons appear as "crunch" with Status 200) */
1436 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
1437 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
1439 /* Clean up and return */
1440 free_http_response(rsp);
1444 hdr = sed(client_patterns, add_client_headers, csp);
1447 /* FIXME Should handle error properly */
1448 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1451 list_remove_all(csp->headers);
1453 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1455 if (fwd->forward_host)
1457 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1458 fwd->forward_host, fwd->forward_port, http->hostport);
1462 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1465 /* here we connect to the server, gateway, or the forwarder */
1467 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
1468 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
1470 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
1471 forwarded_connect_retries, http->hostport);
1474 if (csp->sfd == JB_INVALID_SOCKET)
1476 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1479 if (errno == EINVAL)
1481 rsp = error_response(csp, "no-such-domain", errno);
1483 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
1484 csp->ip_addr_str, http->ocmd);
1488 rsp = error_response(csp, "connect-failed", errno);
1490 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1491 csp->ip_addr_str, http->ocmd);
1495 /* Write the answer to the client */
1498 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1499 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1501 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1505 free_http_response(rsp);
1510 log_error(LOG_LEVEL_CONNECT, "OK");
1512 if (fwd->forward_host || (http->ssl == 0))
1514 /* write the client's (modified) header to the server
1515 * (along with anything else that may be in the buffer)
1518 if (write_socket(csp->sfd, hdr, strlen(hdr))
1519 || (flush_socket(csp->sfd, csp) < 0))
1521 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1524 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1525 csp->ip_addr_str, http->ocmd);
1527 rsp = error_response(csp, "connect-failed", errno);
1531 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1532 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1534 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1538 free_http_response(rsp);
1546 * We're running an SSL tunnel and we're not forwarding,
1547 * so just send the "connect succeeded" message to the
1548 * client, flush the rest, and get out of the way.
1550 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1551 csp->ip_addr_str, http->ocmd);
1553 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
1561 /* we're finished with the client's header */
1564 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1566 /* pass data between the client and server
1567 * until one or the other shuts down the connection.
1576 * FD_ZERO here seems to point to an errant macro which crashes.
1577 * So do this by hand for now...
1579 memset(&rfds,0x00,sizeof(fd_set));
1583 FD_SET(csp->cfd, &rfds);
1584 FD_SET(csp->sfd, &rfds);
1586 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
1590 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1594 /* this is the body of the browser's request
1595 * just read it and write it.
1598 if (FD_ISSET(csp->cfd, &rfds))
1600 len = read_socket(csp->cfd, buf, sizeof(buf));
1604 break; /* "game over, man" */
1607 if (write_socket(csp->sfd, buf, (size_t)len))
1609 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1616 * The server wants to talk. It could be the header or the body.
1617 * If `hdr' is null, then it's the header otherwise it's the body.
1618 * FIXME: Does `hdr' really mean `host'? No.
1622 if (FD_ISSET(csp->sfd, &rfds))
1625 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1629 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1631 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1632 csp->ip_addr_str, http->ocmd);
1634 rsp = error_response(csp, "connect-failed", errno);
1638 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1639 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1641 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1645 free_http_response(rsp);
1649 /* Add a trailing zero. This lets filter_popups
1650 * use string operations.
1654 #ifdef FEATURE_KILL_POPUPS
1655 /* Filter the popups on this read. */
1656 if (block_popups_now)
1658 filter_popups(buf, csp);
1660 #endif /* def FEATURE_KILL_POPUPS */
1662 /* Normally, this would indicate that we've read
1663 * as much as the server has sent us and we can
1664 * close the client connection. However, Microsoft
1665 * in its wisdom has released IIS/5 with a bug that
1666 * prevents it from sending the trailing \r\n in
1667 * a 302 redirect header (and possibly other headers).
1668 * To work around this if we've haven't parsed
1669 * a full header we'll append a trailing \r\n
1670 * and see if this now generates a valid one.
1672 * This hack shouldn't have any impacts. If we've
1673 * already transmitted the header or if this is a
1674 * SSL connection, then we won't bother with this
1675 * hack. So we only work on partially received
1676 * headers. If we append a \r\n and this still
1677 * doesn't generate a valid header, then we won't
1678 * transmit anything to the client.
1683 if (server_body || http->ssl)
1686 * If we have been buffering up the document,
1687 * now is the time to apply content modification
1688 * and send the result to the client.
1693 * If the content filter fails, use the original
1694 * buffer and length.
1695 * (see p != NULL ? p : csp->iob->cur below)
1697 if (NULL == (p = (*content_filter)(csp)))
1699 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
1702 hdr = sed(server_patterns_light, NULL, csp);
1706 /* FIXME Should handle error properly */
1707 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1710 if (write_socket(csp->cfd, hdr, strlen(hdr))
1711 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
1713 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1723 break; /* "game over, man" */
1727 * This is NOT the body, so
1728 * Let's pretend the server just sent us a blank line.
1730 snprintf(buf, sizeof(buf), "\r\n");
1734 * Now, let the normal header parsing algorithm below do its
1735 * job. If it fails, we'll exit instead of continuing.
1742 * If this is an SSL connection or we're in the body
1743 * of the server document, just write it to the client,
1744 * unless we need to buffer the body for later content-filtering
1747 if (server_body || http->ssl)
1752 * If there is no memory left for buffering the content, or the buffer limit
1753 * has been reached, switch to non-filtering mode, i.e. make & write the
1754 * header, flush the iob and buf, and get out of the way.
1756 if (add_to_iob(csp, buf, len))
1761 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
1763 hdr = sed(server_patterns, add_server_headers, csp);
1767 * Memory is too tight to even generate the header.
1768 * Send our static "Out-of-memory" page.
1770 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
1771 rsp = cgi_error_memory();
1773 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1774 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1776 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1781 hdrlen = strlen(hdr);
1783 if (write_socket(csp->cfd, hdr, hdrlen)
1784 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
1785 || (write_socket(csp->cfd, buf, len)))
1787 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
1793 byte_count += hdrlen + (size_t)flushed + len;
1795 content_filter = NULL;
1802 if (write_socket(csp->cfd, buf, len))
1804 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
1813 /* we're still looking for the end of the
1814 * server's header ... (does that make header
1815 * parsing an "out of body experience" ?
1819 * buffer up the data we just read. If that fails,
1820 * there's little we can do but send our static
1821 * out-of-memory page.
1823 if (add_to_iob(csp, buf, len))
1825 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
1826 rsp = cgi_error_memory();
1828 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1829 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1831 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1836 /* get header lines from the iob */
1838 while ((p = get_header(csp)) != NULL)
1842 /* see following note */
1845 enlist(csp->headers, p);
1849 /* NOTE: there are no "empty" headers so
1850 * if the pointer `p' is not NULL we must
1851 * assume that we reached the end of the
1852 * buffer before we hit the end of the header.
1859 /* Well, we tried our MS IIS/5
1860 * hack and it didn't work.
1861 * The header is incomplete
1862 * and there isn't anything
1863 * we can do about it.
1869 /* Since we have to wait for
1870 * more from the server before
1871 * we can parse the headers
1872 * we just continue here.
1878 /* we have now received the entire header.
1879 * filter it and send the result to the client
1882 hdr = sed(server_patterns, add_server_headers, csp);
1885 /* FIXME Should handle error properly */
1886 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1889 #ifdef FEATURE_KILL_POPUPS
1890 /* Start blocking popups if appropriate. */
1892 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1893 !http->ssl && /* We talk plaintext */
1894 block_popups) /* Policy allows */
1896 block_popups_now = 1;
1898 * Filter the part of the body that came in the same read
1899 * as the last headers:
1901 filter_popups(csp->iob->cur, csp);
1904 #endif /* def FEATURE_KILL_POPUPS */
1906 /* Buffer and pcrs filter this if appropriate. */
1908 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1909 !http->ssl && /* We talk plaintext */
1910 pcrs_filter) /* Policy allows */
1912 content_filter = pcrs_filter_response;
1915 /* Buffer and gif_deanimate this if appropriate. */
1917 if ((csp->content_type & CT_GIF) && /* It's an image/gif MIME-Type */
1918 !http->ssl && /* We talk plaintext */
1919 gif_deanimate) /* Policy allows */
1921 content_filter = gif_deanimate_response;
1924 /* Buffer and jpg_inspect this if appropriate. */
1926 if ((csp->content_type & CT_JPEG) && /* It's an image/jpeg MIME-Type */
1927 !http->ssl && /* We talk plaintext */
1928 jpeg_inspect) /* Policy allows */
1930 content_filter = jpeg_inspect_response;
1934 * Only write if we're not buffering for content modification
1936 if (!content_filter)
1938 /* write the server's (modified) header to
1939 * the client (along with anything else that
1940 * may be in the buffer)
1943 if (write_socket(csp->cfd, hdr, strlen(hdr))
1944 || ((len = (size_t)flush_socket(csp->cfd, csp)) < 0))
1946 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1948 /* the write failed, so don't bother
1949 * mentioning it to the client...
1950 * it probably can't hear us anyway.
1959 /* we're finished with the server's header */
1964 /* If this was a MS IIS/5 hack then it means
1965 * the server has already closed the
1966 * connection. Nothing more to read. Time
1977 return; /* huh? we should never get here */
1980 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
1981 csp->ip_addr_str, http->ocmd, byte_count);
1985 /*********************************************************************
1989 * Description : This is little more than chat. We only "serve" to
1990 * to close any socket that chat may have opened.
1993 * 1 : csp = Current client state (buffers, headers, etc...)
1997 *********************************************************************/
1999 void serve(struct client_state *csp)
2000 #else /* ifndef AMIGA */
2001 static void serve(struct client_state *csp)
2002 #endif /* def AMIGA */
2005 close_socket(csp->cfd);
2007 if (csp->sfd != JB_INVALID_SOCKET)
2009 close_socket(csp->sfd);
2012 csp->flags &= ~CSP_FLAG_ACTIVE;
2018 /*********************************************************************
2020 * Function : server_thread
2022 * Description : We only exist to call `serve' in a threaded environment.
2025 * 1 : data = Current client state (buffers, headers, etc...)
2027 * Returns : Always 0.
2029 *********************************************************************/
2030 static int32 server_thread(void *data)
2032 serve((struct client_state *) data);
2039 /*********************************************************************
2043 * Description : Print usage info & exit.
2045 * Parameters : Pointer to argv[0] for identifying ourselves
2049 *********************************************************************/
2050 void usage(const char *myname)
2052 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
2054 "Usage: %s [--help] [--version] [configfile]\n"
2056 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
2058 "Aborting.\n", myname);
2065 /*********************************************************************
2069 * Description : Load the config file and start the listen loop.
2070 * This function is a lot more *sane* with the `load_config'
2071 * and `listen_loop' functions; although it stills does
2072 * a *little* too much for my taste.
2075 * 1 : argc = Number of parameters (including $0).
2076 * 2 : argv = Array of (char *)'s to the parameters.
2078 * Returns : 1 if : can't open config file, unrecognized directive,
2079 * stats requested in multi-thread mode, can't open the
2080 * log file, can't open the jar file, listen port is invalid,
2081 * any load fails, and can't bind port.
2083 * Else main never returns, the process must be signaled
2084 * to terminate execution. Or, on Windows, use the
2085 * "File", "Exit" menu option.
2087 *********************************************************************/
2089 int real_main(int argc, const char *argv[])
2091 int main(int argc, const char *argv[])
2095 unsigned int random_seed;
2097 struct passwd *pw = NULL;
2098 struct group *grp = NULL;
2107 #if !defined(_WIN32)
2115 * Parse the command line arguments
2117 while (++argc_pos < argc)
2120 /* Check to see if the service must be installed or uninstalled */
2121 if (strncmp(argv[argc_pos], "--install", 9) == 0)
2123 const char *pName = argv[argc_pos] + 9;
2126 exit( (install_service(pName)) ? 0 : 1 );
2128 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
2130 const char *pName = argv[argc_pos] + 11;
2133 exit((uninstall_service(pName)) ? 0 : 1);
2135 else if (strcmp(argv[argc_pos], "--service" ) == 0)
2137 bRunAsService = TRUE;
2138 w32_set_service_cwd();
2139 atexit(w32_service_exit_notify);
2142 #endif /* defined(_WIN32) */
2145 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2147 if (strcmp(argv[argc_pos], "--help") == 0)
2152 else if(strcmp(argv[argc_pos], "--version") == 0)
2154 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
2160 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
2165 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
2167 if (++argc_pos == argc) usage(argv[0]);
2168 pidfile = strdup(argv[argc_pos]);
2171 else if (strcmp(argv[argc_pos], "--user" ) == 0)
2173 if (++argc_pos == argc) usage(argv[argc_pos]);
2175 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
2178 if (NULL == (grp = getgrnam(p)))
2180 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
2184 if (NULL == (pw = getpwnam(argv[argc_pos])))
2186 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
2189 if (p != NULL) *--p = '\0';
2192 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
2197 #endif /* defined(unix) */
2198 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
2200 configfile = argv[argc_pos];
2203 } /* -END- while (more arguments) */
2206 if ( *configfile != '/' )
2208 char *abs_file, cwd[1024];
2210 /* make config-filename absolute here */
2211 if ( !(getcwd(cwd, sizeof(cwd))))
2213 perror("get working dir failed");
2217 if (!(basedir = strdup(cwd))
2218 || (!(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))))
2220 perror("malloc failed");
2223 strcpy( abs_file, basedir );
2224 strcat( abs_file, "/" );
2225 strcat( abs_file, configfile );
2226 configfile = abs_file;
2228 #endif /* defined unix */
2232 clients->next = NULL;
2236 #elif defined(_WIN32)
2240 #ifdef FEATURE_PTHREAD
2242 * Prepare global mutex semaphores
2244 pthread_mutex_init(&log_mutex,0);
2245 pthread_mutex_init(&log_init_mutex,0);
2247 #ifndef HAVE_GMTIME_R
2248 pthread_mutex_init(&gmtime_mutex,0);
2249 #endif /* ndef HAVE_GMTIME_R */
2251 #ifndef HAVE_LOCALTIME_R
2252 pthread_mutex_init(&localtime_mutex,0);
2253 #endif /* ndef HAVE_GMTIME_R */
2255 #ifndef HAVE_GETHOSTBYADDR_R
2256 pthread_mutex_init(&gethostbyaddr_mutex,0);
2257 #endif /* ndef HAVE_GETHOSTBYADDR_R */
2259 #ifndef HAVE_GETHOSTBYNAME_R
2260 pthread_mutex_init(&gethostbyname_mutex,0);
2261 #endif /* ndef HAVE_GETHOSTBYNAME_R */
2264 pthread_mutex_init(&rand_mutex,0);
2265 #endif /* ndef HAVE_RANDOM */
2267 #endif /* FEATURE_PTHREAD */
2269 random_seed = (unsigned int)time(NULL);
2271 srandom(random_seed);
2274 #endif /* ifdef HAVE_RANDOM */
2277 * Unix signal handling
2279 * Catch the abort, interrupt and terminate signals for a graceful exit
2280 * Catch the hangup signal so the errlog can be reopened.
2281 * Ignore the broken pipe signals (FIXME: Why?)
2283 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
2286 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
2287 const int ignored_signals[] = { SIGPIPE, 0 };
2289 for (idx = 0; catched_signals[idx] != 0; idx++)
2291 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
2292 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
2294 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
2295 #endif /* ifdef sun */
2297 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
2301 for (idx = 0; ignored_signals[idx] != 0; idx++)
2303 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
2305 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
2310 #else /* ifdef _WIN32 */
2311 # ifdef _WIN_CONSOLE
2313 * We *are* in a windows console app.
2314 * Print a verbose messages about FAQ's and such
2316 printf("%s", win32_blurb);
2317 # endif /* def _WIN_CONSOLE */
2318 #endif /* def _WIN32 */
2321 /* Initialize the CGI subsystem */
2322 cgi_init_error_messages();
2325 * If runnig on unix and without the --nodaemon
2326 * option, become a daemon. I.e. fork, detach
2327 * from tty and get process group leadership
2340 if ( pid < 0 ) /* error */
2345 else if ( pid != 0 ) /* parent */
2350 * must check for errors
2351 * child died due to missing files aso
2354 wpid = waitpid( pid, &status, WNOHANG );
2363 /* Should be more portable, but not as well tested */
2368 #else /* ndef __FreeBSD__ */
2370 #endif /* ndef __FreeBSD__ */
2371 fd = open("/dev/tty", O_RDONLY);
2374 /* no error check here */
2375 ioctl( fd, TIOCNOTTY,0 );
2379 /* FIXME: should close stderr (fd 2) here too, but the test
2381 * and load config file is done in listen_loop() and puts
2382 * some messages on stderr there.
2389 } /* -END- if (!no_daemon) */
2392 * As soon as we have written the PID file, we can switch
2393 * to the user and group ID indicated by the --user option
2399 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
2401 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
2407 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
2409 if (chroot(pw->pw_dir) < 0)
2411 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
2415 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
2418 if (setuid(pw->pw_uid))
2420 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
2424 char putenv_dummy[64];
2426 strcpy(putenv_dummy, "HOME=/");
2427 if (putenv(putenv_dummy) != 0)
2429 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
2432 snprintf(putenv_dummy, 64, "USER=%s", pw->pw_name);
2433 if (putenv(putenv_dummy) != 0)
2435 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
2441 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
2444 #endif /* defined unix */
2447 /* This will be FALSE unless the command line specified --service
2451 /* Yup, so now we must attempt to establish a connection
2452 * with the service dispatcher. This will only work if this
2453 * process was launched by the service control manager to
2454 * actually run as a service. If this isn't the case, i've
2455 * known it take around 30 seconds or so for the call to return.
2458 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
2459 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
2461 /* Service has run, and at this point is now being stopped, so just return */
2466 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
2468 /* An error occurred. Usually it's because --service was wrongly specified
2469 * and we were unable to connect to the Service Control Dispatcher because
2470 * it wasn't expecting us and is therefore not listening.
2472 * For now, just continue below to call the listen_loop function.
2475 #endif /* def _WIN32 */
2485 /*********************************************************************
2487 * Function : bind_port_helper
2489 * Description : Bind the listen port. Handles logging, and aborts
2493 * 1 : config = Privoxy configuration. Specifies port
2496 * Returns : Port that was opened.
2498 *********************************************************************/
2499 static jb_socket bind_port_helper(struct configuration_spec * config)
2504 if ( (config->haddr != NULL)
2505 && (config->haddr[0] == '1')
2506 && (config->haddr[1] == '2')
2507 && (config->haddr[2] == '7')
2508 && (config->haddr[3] == '.') )
2510 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
2513 else if (config->haddr == NULL)
2515 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
2520 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
2521 config->hport, config->haddr);
2524 result = bind_port(config->haddr, config->hport, &bfd);
2531 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2532 "There may be another Privoxy or some other "
2533 "proxy running on port %d",
2534 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
2535 config->hport, config->hport);
2538 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2539 "The hostname is not resolvable",
2540 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2543 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
2544 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2547 /* shouldn't get here */
2548 return JB_INVALID_SOCKET;
2551 config->need_bind = 0;
2558 /* Without this simple workaround we get this compiler warning from _beginthread
2559 * warning C4028: formal parameter 1 different from declaration
2561 void w32_service_listen_loop(void *p)
2565 #endif /* def _WIN32 */
2568 /*********************************************************************
2570 * Function : listen_loop
2572 * Description : bind the listen port and enter a "FOREVER" listening loop.
2578 *********************************************************************/
2579 static void listen_loop(void)
2581 struct client_state *csp = NULL;
2583 struct configuration_spec * config;
2585 config = load_config();
2587 bfd = bind_port_helper(config);
2589 #ifdef FEATURE_GRACEFUL_TERMINATION
2590 while (!g_terminate)
2595 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
2596 while (waitpid(-1, NULL, WNOHANG) > 0)
2598 /* zombie children */
2600 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
2603 * Free data that was used by died threads
2609 * Re-open the errlog after HUP signal
2611 if (received_hup_signal)
2613 init_error_log(Argv[0], config->logfile, config->debug);
2614 received_hup_signal = 0;
2619 #ifdef FEATURE_COOKIE_JAR
2621 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
2622 * already open. I think unload_configfile() is not being run, which should do
2623 * this work. Until that can get resolved, we'll use this workaround.
2627 if (csp->config->jar)
2629 fclose(csp->config->jar);
2630 csp->config->jar = NULL;
2632 #endif /* FEATURE_COOKIE_JAR */
2633 #endif /* __OS2__ */
2635 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
2637 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
2641 csp->flags |= CSP_FLAG_ACTIVE;
2642 csp->sfd = JB_INVALID_SOCKET;
2644 csp->config = config = load_config();
2646 if ( config->need_bind )
2649 * Since we were listening to the "old port", we will not see
2650 * a "listen" param change until the next IJB request. So, at
2651 * least 1 more request must be made for us to find the new
2652 * setting. I am simply closing the old socket and binding the
2655 * Which-ever is correct, we will serve 1 more page via the
2656 * old settings. This should probably be a "show-proxy-args"
2657 * request. This should not be a so common of an operation
2658 * that this will hurt people's feelings.
2663 bfd = bind_port_helper(config);
2666 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
2668 if (!accept_connection(csp, bfd))
2670 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
2683 log_error(LOG_LEVEL_CONNECT, "OK");
2686 #ifdef FEATURE_TOGGLE
2687 if (global_toggle_state)
2689 csp->flags |= CSP_FLAG_TOGGLED_ON;
2691 #endif /* def FEATURE_TOGGLE */
2693 if (run_loader(csp))
2695 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
2696 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2700 if (block_acl(NULL,csp))
2702 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
2703 close_socket(csp->cfd);
2707 #endif /* def FEATURE_ACL */
2709 /* add it to the list of clients */
2710 csp->next = clients->next;
2711 clients->next = csp;
2713 if (config->multi_threaded)
2717 /* this is a switch () statment in the C preprocessor - ugh */
2718 #undef SELECTED_ONE_OPTION
2720 /* Use Pthreads in preference to native code */
2721 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
2722 #define SELECTED_ONE_OPTION
2724 pthread_t the_thread;
2725 pthread_attr_t attrs;
2727 pthread_attr_init(&attrs);
2728 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
2729 errno = pthread_create(&the_thread, &attrs,
2730 (void * (*)(void *))serve, csp);
2731 child_id = errno ? -1 : 0;
2732 pthread_attr_destroy(&attrs);
2736 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
2737 #define SELECTED_ONE_OPTION
2738 child_id = _beginthread(
2739 (void (*)(void *))serve,
2744 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
2745 #define SELECTED_ONE_OPTION
2746 child_id = _beginthread(
2747 (void(* _Optlink)(void*))serve,
2753 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
2754 #define SELECTED_ONE_OPTION
2756 thread_id tid = spawn_thread
2757 (server_thread, "server", B_NORMAL_PRIORITY, csp);
2759 if ((tid >= 0) && (resume_thread(tid) == B_OK))
2761 child_id = (int) tid;
2770 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2771 #define SELECTED_ONE_OPTION
2772 csp->cfd = ReleaseSocket(csp->cfd, -1);
2774 if((child_id = (int)CreateNewProcTags(
2775 NP_Entry, (ULONG)server_thread,
2776 NP_Output, Output(),
2777 NP_CloseOutput, FALSE,
2778 NP_Name, (ULONG)"privoxy child",
2779 NP_StackSize, 200*1024,
2783 ((struct Task *)child_id)->tc_UserData = csp;
2784 Signal((struct Task *)child_id, SIGF_SINGLE);
2789 #if !defined(SELECTED_ONE_OPTION)
2792 /* This block is only needed when using fork().
2793 * When using threads, the server thread was
2794 * created and run by the call to _beginthread().
2796 if (child_id == 0) /* child */
2799 #ifdef FEATURE_TOGGLE
2800 int inherited_toggle_state = global_toggle_state;
2801 #endif /* def FEATURE_TOGGLE */
2806 * If we've been toggled or we've blocked the request, tell Mom
2809 #ifdef FEATURE_TOGGLE
2810 if (inherited_toggle_state != global_toggle_state)
2812 rc |= RC_FLAG_TOGGLED;
2814 #endif /* def FEATURE_TOGGLE */
2816 #ifdef FEATURE_STATISTICS
2817 if (csp->flags & CSP_FLAG_REJECTED)
2819 rc |= RC_FLAG_BLOCKED;
2821 #endif /* ndef FEATURE_STATISTICS */
2825 else if (child_id > 0) /* parent */
2827 /* in a fork()'d environment, the parent's
2828 * copy of the client socket and the CSP
2832 #if !defined(_WIN32) && !defined(__CYGWIN__)
2834 wait( &child_status );
2837 * Evaluate child's return code: If the child has
2838 * - been toggled, toggle ourselves
2839 * - blocked its request, bump up the stats counter
2842 #ifdef FEATURE_TOGGLE
2843 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
2845 global_toggle_state = !global_toggle_state;
2847 #endif /* def FEATURE_TOGGLE */
2849 #ifdef FEATURE_STATISTICS
2851 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
2855 #endif /* def FEATURE_STATISTICS */
2857 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
2858 close_socket(csp->cfd);
2859 csp->flags &= ~CSP_FLAG_ACTIVE;
2863 #undef SELECTED_ONE_OPTION
2864 /* end of cpp switch () */
2866 if (child_id < 0) /* failed */
2868 char buf[BUFFER_SIZE];
2870 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
2872 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
2874 write_socket(csp->cfd, buf, strlen(buf));
2875 close_socket(csp->cfd);
2876 csp->flags &= ~CSP_FLAG_ACTIVE;
2887 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
2889 /* Clean up. Aim: free all memory (no leaks) */
2890 #ifdef FEATURE_GRACEFUL_TERMINATION
2892 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
2894 unload_current_config_file();
2895 unload_current_actions_file();
2896 unload_current_re_filterfile();
2897 #ifdef FEATURE_TRUST
2898 unload_current_trust_file();
2901 if (config->multi_threaded)
2908 } while ((clients->next != NULL) && (--i > 0));
2912 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
2923 #ifdef FEATURE_COOKIE_JAR
2924 if (NULL != config->jar)
2926 fclose(config->jar);
2930 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
2931 /* Cleanup - remove taskbar icon etc. */
2936 #endif /* FEATURE_GRACEFUL_TERMINATION */