1 const char jcc_rcs[] = "$Id: jcc.c,v 1.116 2006/12/29 19:08:22 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 1.116 2006/12/29 19:08:22 fabiankeil
37 * Reverted parts of my last commit
38 * to keep error handling working.
40 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
41 * Fixed gcc43 conversion warnings.
43 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
44 * Fix -pedantic ISO C warning about converting
45 * from function pointer to object pointer.
47 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
48 * Silence compiler warning I introduced with my last commit.
50 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
51 * Mutex protect rand() if POSIX threading
52 * is used, warn the user if that's not possible
53 * and stop using it on _WIN32 where it could
56 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
57 * Don't prevent core dumps by catching SIGABRT.
58 * It's rude and makes debugging unreasonable painful.
60 * Revision 1.110 2006/12/13 14:52:53 etresoft
61 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
63 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
64 * Privoxy is now able to run as intercepting
65 * proxy in combination with any packet filter
66 * that does the port redirection. The destination
67 * is extracted from the "Host:" header which
68 * should be available for nearly all requests.
70 * Moved HTTP snipplets into jcc.c.
71 * Added error message for gopher proxy requests.
73 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
74 * Only unlink the pidfile if it's actually used.
76 * Change order of interception checks to make
77 * it possible to block or redirect requests for
80 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
81 * Make pthread mutex locking more generic. Instead of
82 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
83 * and use mutex locking unless there is an _r function
84 * available. Better safe than sorry.
86 * Fixes "./configure --disable-pthread" and should result
87 * in less threading-related problems on pthread-using platforms,
88 * but it still doesn't fix BR#1122404.
90 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
91 * Move pthread.h inclusion from jcc.c to jcc.h.
92 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
94 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
95 * Don't exit after receiving the second SIGHUP on Solaris.
97 * Fixes BR 1052235, but the same problem may exist on other
98 * systems. Once 3.0.6 is out we should use sigset()
99 * where available and see if it breaks anything.
101 * Revision 1.104 2006/09/23 13:26:38 roro
102 * Replace TABs by spaces in source code.
104 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
105 * Fix +redirect{}. Didn't work with -fast-redirects.
107 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
108 * Respond with 400 and a short text message
109 * if the client tries to use Privoxy as FTP proxy.
111 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
112 * Make number of retries in case of forwarded-connect problems
113 * a config file option (forwarded-connect-retries) and use 0 as
116 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
117 * Set random(3) seed.
119 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
120 * Follow the OpenBSD port's lead and protect the resolve
121 * functions on OpenBSD as well.
123 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
124 * --user fix. Only use the user as group if no group is specified.
125 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
127 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
128 * Windows service (re-)integration
132 * --install[:service_name]
133 * --uninstall[:service_name]
136 * They work as follows:
137 * --install will create a service for you and then terminate.
138 * By default the service name will be "privoxy" (without the quotes).
139 * However you can run multiple services if you wish, just by adding
140 * a colon and then a name (no spaces).
142 * --uninstall follows the exact same rules a --install.
144 * --service is used when the program is executed by the service
145 * control manager, and in normal circumstances would never be
146 * used as a command line argument.
148 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
149 * Windows service integration
151 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
152 * Incorporate Fabian Keil's patch work:
153 http://www.fabiankeil.de/sourcecode/privoxy/
155 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
156 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
157 * with what was really the latest development (the v_3_0_branch branch)
159 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
160 * Thanks to Jindrich Makovicka for a race condition fix for the log
161 * file. The race condition remains for non-pthread implementations.
162 * Reference patch #1175720.
164 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
165 * Add the ability to check jpeg images for invalid
166 * lengths of comment blocks. Defensive strategy
167 * against the exploit:
168 * Microsoft Security Bulletin MS04-028
169 * Buffer Overrun in JPEG Processing (GDI+) Could
170 * Allow Code Execution (833987)
171 * Enabled with +inspect-jpegs in actions files.
173 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
174 * - Fixed usage info for non-unix platforms
175 * - Fixed small cmdline parsing bug
177 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
178 * Diagnostics: Now preserve the returncode of pthread_create
179 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
181 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
182 * No longer ignore SIGCHLD. Fixes bug #769381
184 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
185 * Close jarfile on graceful exit, remove stray line
187 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
188 * Cosmetics: Killed a warning, a typo and an allocation left at exit
190 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
191 * No longer rely on non-POSIX.1 extensions of getcwd().
194 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
195 * Replaced setenv() by posix-compliant putenv()
196 * Thanks to Neil McCalden (nmcc AT users.sf.net).
198 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
199 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
201 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
202 * Clean-up and extension of improvements for forked mode:
203 * - Child's return code now consists of flags RC_FLAG_*
204 * - Reporting toggle to parent now properly #ifdef'ed
205 * - Children now report blocking to parent. This enables
206 * statistics in forked mode
208 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
209 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
210 * Children now report having been toggled through _exit(17), parents
211 * watch for that code and toggle themselves if found.
213 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
214 * Wrapping all *_r functions (the non-_r versions of them) with
215 * mutex semaphores for OSX. Hopefully this will take care of all
216 * of those pesky crash reports.
218 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
219 * Fixed two mostly harmless mem leaks
221 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
222 * Fix: Head of global clients list now initialized to NULL
224 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
225 * Added basic support for OPTIONS and TRACE HTTP methods:
226 * - New interceptor direct_response() added in chat().
227 * - sed() moved to earlier in the process, so that the
228 * Host: header is evaluated before actions and forwarding
231 * Revision 1.92 2002/05/08 16:00:46 oes
232 * Chat's buffer handling:
233 * - Fixed bug with unchecked out-of-mem conditions
234 * while reading client request & server headers
235 * - No longer predict if the buffer limit will be exceeded
236 * in the next read -- check add_to_iob's new
237 * return code. If buffer couldn't be extended
238 * (policy or out-of-mem) while
239 * - reading from client: abort
240 * - reading server headers: send error page
241 * - buffering server body for filter: flush,
242 * and if that fails: send error page
244 * Revision 1.91 2002/04/08 20:35:58 swa
247 * Revision 1.90 2002/04/02 14:57:28 oes
248 * Made sending wafers independent of FEATURE_COOKIE_JAR
250 * Revision 1.89 2002/03/31 17:18:59 jongfoster
251 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
253 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
254 * More compiler warning message maintenance
256 * Revision 1.87 2002/03/26 22:29:54 swa
257 * we have a new homepage!
259 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
260 * Workaround for closing the jarfile before load_config() comes around again
262 * Revision 1.85 2002/03/24 15:23:33 jongfoster
265 * Revision 1.84 2002/03/24 13:25:43 swa
266 * name change related issues
268 * Revision 1.83 2002/03/16 23:54:06 jongfoster
269 * Adding graceful termination feature, to help look for memory leaks.
270 * If you enable this (which, by design, has to be done by hand
271 * editing config.h) and then go to http://i.j.b/die, then the program
272 * will exit cleanly after the *next* request. It should free all the
273 * memory that was used.
275 * Revision 1.82 2002/03/13 00:27:05 jongfoster
278 * Revision 1.81 2002/03/12 01:42:50 oes
279 * Introduced modular filters
281 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
282 * OS/2 port maintenance:
283 * - Fixed EMX build - it had decayed a little
284 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
285 * substituted a memset for now.
287 * Revision 1.79 2002/03/09 20:03:52 jongfoster
288 * - Making various functions return int rather than size_t.
289 * (Undoing a recent change). Since size_t is unsigned on
290 * Windows, functions like read_socket that return -1 on
291 * error cannot return a size_t.
293 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
294 * crashes, and also frequently caused JB to jump to 100%
295 * CPU and stay there. (Because it thought it had just
296 * read ((unsigned)-1) == 4Gb of data...)
298 * - The signature of write_socket has changed, it now simply
299 * returns success=0/failure=nonzero.
301 * - Trying to get rid of a few warnings --with-debug on
302 * Windows, I've introduced a new type "jb_socket". This is
303 * used for the socket file descriptors. On Windows, this
304 * is SOCKET (a typedef for unsigned). Everywhere else, it's
305 * an int. The error value can't be -1 any more, so it's
306 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
307 * Windows it maps to the #define INVALID_SOCKET.)
309 * - The signature of bind_port has changed.
311 * Revision 1.78 2002/03/08 21:35:04 oes
312 * Added optional group supplement to --user option. Will now use default group of user if no group given
314 * Revision 1.77 2002/03/07 03:52:06 oes
315 * - Fixed compiler warnings etc
316 * - Improved handling of failed DNS lookups
318 * Revision 1.76 2002/03/06 22:54:35 jongfoster
319 * Automated function-comment nitpicking.
321 * Revision 1.75 2002/03/06 10:02:19 oes
322 * Fixed stupid bug when --user was not given
324 * Revision 1.74 2002/03/06 00:49:31 jongfoster
325 * Fixing warning on Windows
326 * Making #ifdefs that refer to the same variable consistently
327 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
329 * Revision 1.73 2002/03/05 23:57:30 hal9
330 * Stray character 's' on line 1618 was breaking build.
332 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
333 * - Re-enable OS/2 building after new parms were added
334 * - Fix false out of memory report when resolving CGI templates when no IP
335 * address is available of failed attempt (a la no such domain)
337 * Revision 1.71 2002/03/05 18:13:56 oes
338 * Added --user option
340 * Revision 1.70 2002/03/05 04:52:42 oes
341 * Deleted non-errlog debugging code
343 * Revision 1.69 2002/03/04 23:50:00 jongfoster
344 * Splitting off bind_port() call into bind_port_helper(), with
347 * Revision 1.68 2002/03/04 20:17:32 oes
350 * Revision 1.67 2002/03/04 18:18:57 oes
351 * - Removed _DEBUG mode
352 * - Cleand up cmdline parsing
353 * - Introduced --no-daemon, --pidfile options
354 * - Cleaned up signal handling:
355 * - Terminate cleanly on INT, TERM and ABRT
356 * - Schedule logfile for re-opening on HUP
357 * - Ignore CHLD and PIPE
358 * - Leave the rest with their default handlers
359 * - Uniform handler registration
360 * - Added usage() function
361 * - Played styleguide police
363 * Revision 1.66 2002/03/03 15:06:55 oes
364 * Re-enabled automatic config reloading
366 * Revision 1.65 2002/03/03 14:49:11 oes
367 * Fixed CLF logging: Now uses client's original HTTP request
369 * Revision 1.64 2002/03/03 09:18:03 joergs
370 * Made jumbjuster work on AmigaOS again.
372 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
373 * Clean up a little CRLF unpleasantness that suddenly appeared
375 * Revision 1.62 2002/02/20 23:17:23 jongfoster
376 * Detecting some out-of memory conditions and exiting with a log message.
378 * Revision 1.61 2002/01/17 21:01:52 jongfoster
379 * Moving all our URL and URL pattern parsing code to urlmatch.c.
381 * Revision 1.60 2001/12/30 14:07:32 steudten
382 * - Add signal handling (unix)
383 * - Add SIGHUP handler (unix)
384 * - Add creation of pidfile (unix)
385 * - Add action 'top' in rc file (RH)
386 * - Add entry 'SIGNALS' to manpage
387 * - Add exit message to logfile (unix)
389 * Revision 1.59 2001/12/13 14:07:18 oes
390 * Fixed Bug: 503 error page now sent OK
392 * Revision 1.58 2001/11/30 23:37:24 jongfoster
393 * Renaming the Win32 config file to config.txt - this is almost the
394 * same as the corresponding UNIX name "config"
396 * Revision 1.57 2001/11/16 00:47:43 jongfoster
397 * Changing the tty-disconnection code to use setsid().
399 * Revision 1.56 2001/11/13 20:20:54 jongfoster
400 * Tabs->spaces, fixing a bug with missing {} around an if()
402 * Revision 1.55 2001/11/13 20:14:53 jongfoster
403 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
405 * Revision 1.54 2001/11/07 00:03:14 steudten
406 * Give reliable return value if an error
407 * occurs not just 0 with new daemon mode.
409 * Revision 1.53 2001/11/05 21:41:43 steudten
410 * Add changes to be a real daemon just for unix os.
411 * (change cwd to /, detach from controlling tty, set
412 * process group and session leader to the own process.
414 * Add some fatal-error log message for failed malloc().
415 * Add '-d' if compiled with 'configure --with-debug' to
416 * enable debug output.
418 * Revision 1.52 2001/10/26 20:11:20 jongfoster
419 * Fixing type mismatch
421 * Revision 1.51 2001/10/26 17:38:28 oes
424 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
425 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
426 * threads to call select() simultaneously. So, it's time to do a real, live,
427 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
428 * (native). Both versions will work, but using __OS2__ offers multi-threading.
430 * Revision 1.49 2001/10/23 21:41:35 jongfoster
431 * Added call to initialize the (statically-allocated of course)
432 * "out of memory" CGI response.
434 * Revision 1.48 2001/10/10 19:56:46 jongfoster
435 * Moving some code that wasn't cookie-related out of an #ifdef
438 * Revision 1.47 2001/10/10 16:44:36 oes
439 * Added CONNECT destination port limitation check
441 * Revision 1.46 2001/10/08 15:17:41 oes
442 * Re-enabled SSL forwarding
444 * Revision 1.45 2001/10/07 15:42:11 oes
445 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
447 * Moved downgrading of the HTTP version from parse_http_request to
448 * chat(), since we can't decide if it is necessary before we have
449 * determined the actions for the URL. The HTTP command is now
450 * *always* re-built so the repairs need no longer be special-cased.
452 * filter_popups now gets a csp pointer so it can raise the new
453 * CSP_FLAG_MODIFIED flag.
457 * Added configurable size limit for the IOB. If the IOB grows so
458 * large that the next read would exceed the limit, the header
459 * is generated, and the header & unfiltered buffer are flushed
460 * to the client. Chat then continues in non-buffering,
461 * non-filtering body mode.
463 * Revision 1.44 2001/10/02 18:13:57 oes
466 * Revision 1.43 2001/10/02 15:32:13 oes
467 * Moved generation of hdr
469 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
470 * Cleaning up 2 compiler warnings on OS/2.
472 * Revision 1.41 2001/09/16 17:05:14 jongfoster
473 * Removing unused #include showarg.h
475 * Revision 1.40 2001/09/16 15:41:45 jongfoster
476 * Fixing signed/unsigned comparison warning.
478 * Revision 1.39 2001/09/16 13:21:27 jongfoster
479 * Changes to use new list functions.
481 * Revision 1.38 2001/09/16 13:01:46 jongfoster
482 * Removing redundant function call that zeroed zalloc()'d memory.
484 * Revision 1.37 2001/09/10 11:12:24 oes
485 * Deleted unused variable
487 * Revision 1.36 2001/09/10 10:56:15 oes
488 * Silenced compiler warnings
490 * Revision 1.35 2001/07/31 14:44:22 oes
491 * Deleted unused size parameter from filter_popups()
493 * Revision 1.34 2001/07/30 22:08:36 jongfoster
494 * Tidying up #defines:
495 * - All feature #defines are now of the form FEATURE_xxx
496 * - Permanently turned off WIN_GUI_EDIT
497 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
499 * Revision 1.33 2001/07/29 19:32:00 jongfoster
500 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
502 * Revision 1.32 2001/07/29 18:47:05 jongfoster
503 * Adding missing #include "loadcfg.h"
505 * Revision 1.31 2001/07/29 12:17:48 oes
506 * Applied pthread fix by Paul Lieverse
508 * Revision 1.30 2001/07/25 22:57:13 jongfoster
509 * __BEOS__ no longer overrides FEATURE_PTHREAD.
510 * This is because FEATURE_PTHREAD will soon be widely used, so I
511 * want to keep it simple.
513 * Revision 1.29 2001/07/24 12:47:06 oes
514 * Applied BeOS support update by Eugenia
516 * Revision 1.28 2001/07/23 13:26:12 oes
517 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
519 * Revision 1.27 2001/07/19 19:09:47 haroon
520 * - Added code to take care of the situation where while processing the first
521 * server response (which includes the server header), after finding the end
522 * of the headers we were not looking past the end of the headers for
523 * content modification. I enabled it for filter_popups.
524 * Someone else should look to see if other similar operations should be
525 * done to the discarded portion of the buffer.
527 * Note 2001/07/20: No, the other content modification mechanisms will process
528 * the whole iob later anyway. --oes
530 * Revision 1.26 2001/07/18 12:31:36 oes
533 * Revision 1.25 2001/07/15 19:43:49 jongfoster
534 * Supports POSIX threads.
535 * Also removed some unused #includes.
537 * Revision 1.24 2001/07/13 14:00:40 oes
538 * - Generic content modification scheme:
539 * Each feature has its own applicability flag that is set
540 * from csp->action->flags.
541 * Replaced the "filtering" int flag , by a function pointer
542 * "content_filter" to the function that will do the content
543 * modification. If it is != NULL, the document will be buffered
544 * and processed through *content_filter, which must set
545 * csp->content_length and return a modified copy of the body
546 * or return NULL (on failiure).
547 * - Changed csp->is_text to the more generic bitmap csp->content_type
548 * which can currently take the valued CT_TEXT or CT_GIF
550 * - Removed all #ifdef PCRS
552 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
553 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
554 * the `block_acl' call. This prevents a compilation error when the user
555 * does not wish to use the "ACL" feature.
557 * Revision 1.22 2001/06/29 21:45:41 oes
558 * Indentation, CRLF->LF, Tab-> Space
560 * Revision 1.21 2001/06/29 13:29:36 oes
561 * - Cleaned up, improved comments
562 * - Unified all possible interceptors (CGI,
563 * block, trust, fast_redirect) in one
564 * place, with one (CGI) answer generation
565 * mechansim. Much clearer now.
566 * - Removed the GIF image generation, which
567 * is now done in filters.c:block_url()
568 * - Made error conditions like domain lookup
569 * failiure or (various) problems while talking
570 * to the server use cgi.c:error_response()
571 * instead of generating HTML/HTTP in chat() (yuck!)
572 * - Removed logentry from cancelled commit
574 * Revision 1.20 2001/06/09 10:55:28 jongfoster
575 * Changing BUFSIZ ==> BUFFER_SIZE
577 * Revision 1.19 2001/06/07 23:12:52 jongfoster
578 * Replacing function pointer in struct gateway with a directly
579 * called function forwarded_connect().
580 * Replacing struct gateway with struct forward_spec
582 * Revision 1.18 2001/06/03 19:12:16 oes
583 * introduced new cgi handling
585 * Revision 1.17 2001/06/01 20:07:23 jongfoster
586 * Now uses action +image-blocker{} rather than config->tinygif
588 * Revision 1.16 2001/06/01 18:49:17 jongfoster
589 * Replaced "list_share" with "list" - the tiny memory gain was not
590 * worth the extra complexity.
592 * Revision 1.15 2001/05/31 21:24:47 jongfoster
593 * Changed "permission" to "action" throughout.
594 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
595 * Moved vanilla wafer check into chat(), since we must now
596 * decide whether or not to add it based on the URL.
598 * Revision 1.14 2001/05/29 20:14:01 joergs
599 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
602 * Revision 1.13 2001/05/29 09:50:24 jongfoster
603 * Unified blocklist/imagelist/permissionslist.
604 * File format is still under discussion, but the internal changes
607 * Also modified interceptor behaviour:
608 * - We now intercept all URLs beginning with one of the following
609 * prefixes (and *only* these prefixes):
611 * * http://ijbswa.sf.net/config/
612 * * http://ijbswa.sourceforge.net/config/
613 * - New interceptors "home page" - go to http://i.j.b/ to see it.
614 * - Internal changes so that intercepted and fast redirect pages
615 * are not replaced with an image.
616 * - Interceptors now have the option to send a binary page direct
617 * to the client. (i.e. ijb-send-banner uses this)
618 * - Implemented show-url-info interceptor. (Which is why I needed
619 * the above interceptors changes - a typical URL is
620 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
621 * The previous mechanism would not have intercepted that, and
622 * if it had been intercepted then it then it would have replaced
625 * Revision 1.12 2001/05/27 22:17:04 oes
627 * - re_process_buffer no longer writes the modified buffer
628 * to the client, which was very ugly. It now returns the
629 * buffer, which it is then written by chat.
631 * - content_length now adjusts the Content-Length: header
632 * for modified documents rather than crunch()ing it.
633 * (Length info in csp->content_length, which is 0 for
634 * unmodified documents)
636 * - For this to work, sed() is called twice when filtering.
638 * Revision 1.11 2001/05/26 17:27:53 jongfoster
639 * Added support for CLF and fixed LOG_LEVEL_LOG.
640 * Also did CRLF->LF fix of my previous patch.
642 * Revision 1.10 2001/05/26 15:26:15 jongfoster
643 * ACL feature now provides more security by immediately dropping
644 * connections from untrusted hosts.
646 * Revision 1.9 2001/05/26 00:28:36 jongfoster
647 * Automatic reloading of config file.
648 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
649 * Most of the global variables have been moved to a new
650 * struct configuration_spec, accessed through csp->config->globalname
651 * Most of the globals remaining are used by the Win32 GUI.
653 * Revision 1.8 2001/05/25 22:43:18 jongfoster
654 * Fixing minor memory leak and buffer overflow.
656 * Revision 1.7 2001/05/25 22:34:30 jongfoster
659 * Revision 1.6 2001/05/23 00:13:58 joergs
660 * AmigaOS support fixed.
662 * Revision 1.5 2001/05/22 18:46:04 oes
664 * - Enabled filtering banners by size rather than URL
665 * by adding patterns that replace all standard banner
666 * sizes with the "Junkbuster" gif to the re_filterfile
668 * - Enabled filtering WebBugs by providing a pattern
669 * which kills all 1x1 images
671 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
672 * which is selected by the (nonstandard and therefore
673 * capital) letter 'U' in the option string.
674 * It causes the quantifiers to be ungreedy by default.
675 * Appending a ? turns back to greedy (!).
677 * - Added a new interceptor ijb-send-banner, which
678 * sends back the "Junkbuster" gif. Without imagelist or
679 * MSIE detection support, or if tinygif = 1, or the
680 * URL isn't recognized as an imageurl, a lame HTML
681 * explanation is sent instead.
683 * - Added new feature, which permits blocking remote
684 * script redirects and firing back a local redirect
686 * The feature is conditionally compiled, i.e. it
687 * can be disabled with --disable-fast-redirects,
688 * plus it must be activated by a "fast-redirects"
689 * line in the config file, has its own log level
690 * and of course wants to be displayed by show-proxy-args
691 * Note: Boy, all the #ifdefs in 1001 locations and
692 * all the fumbling with configure.in and acconfig.h
693 * were *way* more work than the feature itself :-(
695 * - Because a generic redirect template was needed for
696 * this, tinygif = 3 now uses the same.
698 * - Moved GIFs, and other static HTTP response templates
703 * - Removed some >400 CRs again (Jon, you really worked
706 * Revision 1.4 2001/05/21 19:34:01 jongfoster
707 * Made failure to bind() a fatal error.
709 * Revision 1.3 2001/05/20 01:21:20 jongfoster
710 * Version 2.9.4 checkin.
711 * - Merged popupfile and cookiefile, and added control over PCRS
712 * filtering, in new "permissionsfile".
713 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
714 * file error you now get a message box (in the Win32 GUI) rather
715 * than the program exiting with no explanation.
716 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
718 * - Removed tabs from "config"
719 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
720 * - Bumped up version number.
722 * Revision 1.2 2001/05/17 22:34:44 oes
723 * - Added hint on GIF char array generation to jcc.c
724 * - Cleaned CRLF's from the sources and related files
725 * - Repaired logging for REF and FRC
727 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
728 * Initial import of version 2.9.3 source tree
731 *********************************************************************/
737 #include <sys/types.h>
745 # ifndef FEATURE_PTHREAD
749 # include <windows.h>
750 # include <process.h>
751 # endif /* ndef FEATURE_PTHREAD */
754 # ifndef _WIN_CONSOLE
756 # endif /* ndef _WIN_CONSOLE */
757 # include "w32svrapi.h"
759 #else /* ifndef _WIN32 */
761 # if !defined (__OS2__)
763 # include <sys/wait.h>
764 # endif /* ndef __OS2__ */
765 # include <sys/time.h>
766 # include <sys/stat.h>
767 # include <sys/ioctl.h>
770 #include <sys/termios.h>
781 # include <socket.h> /* BeOS has select() for sockets only. */
782 # include <OS.h> /* declarations for threads and stuff. */
785 # if defined(__EMX__) || defined(__OS2__)
786 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
791 #define bzero(B,N) memset(B,0x00,n)
806 #include "killpopup.h"
807 #include "miscutil.h"
809 #include "jbsockets.h"
814 #include "urlmatch.h"
816 const char jcc_h_rcs[] = JCC_H_VERSION;
817 const char project_h_rcs[] = PROJECT_H_VERSION;
820 struct client_state clients[1];
821 struct file_list files[1];
823 #ifdef FEATURE_STATISTICS
824 int urls_read = 0; /* total nr of urls read inc rejected */
825 int urls_rejected = 0; /* total nr of urls rejected */
826 #endif /* def FEATURE_STATISTICS */
828 #ifdef FEATURE_GRACEFUL_TERMINATION
832 static void listen_loop(void);
833 static void chat(struct client_state *csp);
835 void serve(struct client_state *csp);
836 #else /* ifndef AMIGA */
837 static void serve(struct client_state *csp);
838 #endif /* def AMIGA */
841 static int32 server_thread(void *data);
842 #endif /* def __BEOS__ */
845 #define sleep(N) Sleep(((N) * 1000))
849 #define sleep(N) DosSleep(((N) * 100))
852 #ifdef FEATURE_PTHREAD
853 pthread_mutex_t log_mutex;
854 pthread_mutex_t log_init_mutex;
856 #ifndef HAVE_GMTIME_R
857 pthread_mutex_t gmtime_mutex;
858 #endif /* ndef HAVE_GMTIME_R */
860 #ifndef HAVE_LOCALTIME_R
861 pthread_mutex_t localtime_mutex;
862 #endif /* ndef HAVE_GMTIME_R */
864 #ifndef HAVE_GETHOSTBYADDR_R
865 pthread_mutex_t gethostbyaddr_mutex;
866 #endif /* ndef HAVE_GETHOSTBYADDR_R */
868 #ifndef HAVE_GETHOSTBYNAME_R
869 pthread_mutex_t gethostbyname_mutex;
870 #endif /* ndef HAVE_GETHOSTBYNAME_R */
873 pthread_mutex_t rand_mutex;
874 #endif /* ndef HAVE_RANDOM */
876 #endif /* FEATURE_PTHREAD */
878 #if defined(unix) || defined(__EMX__)
879 const char *basedir = NULL;
880 const char *pidfile = NULL;
881 int received_hup_signal = 0;
882 #endif /* defined unix */
884 /* The vanilla wafer. */
885 static const char VANILLA_WAFER[] =
886 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
887 "Do_not_send_me_any_copyrighted_information_other_than_the_"
888 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
889 "In_particular_do_not_send_me_any_cookies_that_"
890 "are_subject_to_a_claim_of_copyright_by_anybody._"
891 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
892 "(copyright_or_otherwise)_applying_to_any_cookie._";
894 /* HTTP snipplets. */
895 const char CSUCCEED[] =
896 "HTTP/1.0 200 Connection established\n"
897 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
899 const char CHEADER[] =
900 "HTTP/1.0 400 Invalid header received from browser\r\n"
901 "Connection: close\r\n\r\n"
902 "Invalid header received from browser.";
904 const char CFORBIDDEN[] =
905 "HTTP/1.0 403 Connection not allowable\r\n"
906 "X-Hint: If you read this message interactively, then you know why this happens ,-)\r\n"
907 "Connection: close\r\n\r\n";
909 const char FTP_RESPONSE[] =
910 "HTTP/1.0 400 Invalid request received from browser\r\n"
911 "Connection: close\r\n\r\n"
912 "Invalid request. Privoxy doesn't support FTP.\r\n";
914 const char GOPHER_RESPONSE[] =
915 "HTTP/1.0 400 Invalid request received from browser\r\n"
916 "Connection: close\r\n\r\n"
917 "Invalid request. Privoxy doesn't support gopher.\r\n";
919 const char MISSING_DESTINATION_RESPONSE[] =
920 "HTTP/1.0 400 Bad request received from browser\r\n"
921 "Connection: close\r\n\r\n"
922 "Bad request. Privoxy was unable to extract the destination.\r\n";
925 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
926 /*********************************************************************
928 * Function : sig_handler
930 * Description : Signal handler for different signals.
931 * Exit gracefully on TERM and INT
932 * or set a flag that will cause the errlog
933 * to be reopened by the main thread on HUP.
936 * 1 : the_signal = the signal cause this function to call
940 *********************************************************************/
941 static void sig_handler(int the_signal)
947 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
958 received_hup_signal = 1;
963 * We shouldn't be here, unless we catch signals
964 * in main() that we can't handle here!
966 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
974 /*********************************************************************
978 * Description : Once a connection to the client has been accepted,
979 * this function is called (via serve()) to handle the
980 * main business of the communication. When this
981 * function returns, the caller must close the client
985 * 1 : csp = Current client state (buffers, headers, etc...)
987 * Returns : On success, the number of bytes written are returned (zero
988 * indicates nothing was written). On error, -1 is returned,
989 * and errno is set appropriately. If count is zero and the
990 * file descriptor refers to a regular file, 0 will be
991 * returned without causing any other effect. For a special
992 * file, the results are not portable.
994 *********************************************************************/
995 static void chat(struct client_state *csp)
998 * This next lines are a little ugly, but they simplifies the if statements
999 * below. Basically if TOGGLE, then we want the if to test if the
1000 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
1001 * then we want the if to test for CSP_FLAG_FORCED , else we don't
1003 #ifdef FEATURE_TOGGLE
1004 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
1005 #else /* ifndef FEATURE_TOGGLE */
1006 # define IS_TOGGLED_ON_AND
1007 #endif /* ndef FEATURE_TOGGLE */
1008 #ifdef FEATURE_FORCE_LOAD
1009 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
1010 #else /* ifndef FEATURE_FORCE_LOAD */
1011 # define IS_NOT_FORCED_AND
1012 #endif /* def FEATURE_FORCE_LOAD */
1014 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
1016 char buf[BUFFER_SIZE];
1024 int ms_iis5_hack = 0;
1025 size_t byte_count = 0;
1026 int forwarded_connect_retries = 0;
1027 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
1028 const struct forward_spec * fwd;
1029 struct http_request *http;
1030 int len; /* for buffer sizes (and negative error codes) */
1031 #ifdef FEATURE_KILL_POPUPS
1032 int block_popups; /* bool, 1==will block popups */
1033 int block_popups_now = 0; /* bool, 1==currently blocking popups */
1034 #endif /* def FEATURE_KILL_POPUPS */
1036 int pcrs_filter; /* bool, 1==will filter through pcrs */
1037 int gif_deanimate; /* bool, 1==will deanimate gifs */
1038 int jpeg_inspect; /* bool, 1==will inspect jpegs */
1040 /* Function that does the content filtering for the current request */
1041 char *(*content_filter)() = NULL;
1043 /* Skeleton for HTTP response, if we should intercept the request */
1044 struct http_response *rsp;
1046 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1047 struct list header_list;
1048 struct list *headers = &header_list;
1053 * Read the client's request. Note that since we're not using select() we
1054 * could get blocked here if a client connected, then didn't say anything!
1059 len = read_socket(csp->cfd, buf, sizeof(buf));
1061 if (len <= 0) break; /* error! */
1064 * If there is no memory left for buffering the
1065 * request, there is nothing we can do but hang up
1067 if (add_to_iob(csp, buf, len))
1072 req = get_header(csp);
1076 break; /* no HTTP request! */
1081 continue; /* more to come! */
1085 * If it's a FTP or gopher request, we don't support it.
1087 * These checks are better than nothing, but they might
1088 * not work in all configurations and some clients might
1089 * have problems digesting the answer.
1091 * They should, however, never cause more problems than
1092 * Privoxy's old behaviour (returning the misleading HTML error message:
1093 * "Could not resolve http://(ftp|gopher)://example.org").
1095 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1097 if (!strncmpic(req, "GET ftp://", 10))
1099 strcpy(buf, FTP_RESPONSE);
1100 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as FTP proxy: %s",
1101 csp->ip_addr_str, req);
1105 strcpy(buf, GOPHER_RESPONSE);
1106 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as gopher proxy: %s",
1107 csp->ip_addr_str, req);
1109 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1111 write_socket(csp->cfd, buf, strlen(buf));
1112 free_http_request(http);
1116 #ifdef FEATURE_FORCE_LOAD
1117 /* If this request contains the FORCE_PREFIX,
1118 * better get rid of it now and set the force flag --oes
1121 if (strstr(req, FORCE_PREFIX))
1123 strclean(req, FORCE_PREFIX);
1124 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
1125 csp->flags |= CSP_FLAG_FORCED;
1128 #endif /* def FEATURE_FORCE_LOAD */
1130 switch( parse_http_request(req, http, csp) )
1133 log_error(LOG_LEVEL_ERROR, "Out of memory while parsing request.");
1136 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", req);
1144 if (http->cmd == NULL)
1146 strcpy(buf, CHEADER);
1147 write_socket(csp->cfd, buf, strlen(buf));
1149 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
1151 free_http_request(http);
1155 /* grab the rest of the client's headers */
1159 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1161 len = read_socket(csp->cfd, buf, sizeof(buf));
1164 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1169 * If there is no memory left for buffering the
1170 * request, there is nothing we can do but hang up
1172 if (add_to_iob(csp, buf, len))
1179 if (p == NULL) break;
1186 if (http->host == NULL)
1189 * Intercepted or invalid request without domain
1190 * inside the request line. Try to get it another way,
1191 * unless accept-intercepted-requests is disabled.
1193 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1195 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1196 " Privoxy isn't configured to accept intercepted requests.",
1197 csp->ip_addr_str, http->cmd);
1198 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, http->cmd);
1200 strcpy(buf, CHEADER);
1201 write_socket(csp->cfd, buf, strlen(buf));
1202 free_http_request(http);
1203 destroy_list(headers);
1206 else if (JB_ERR_OK == get_destination_from_headers(headers, http))
1208 /* Split the domain we just got for pattern matching */
1209 init_domain_components(http);
1213 /* We can't work without destination. Go spread the news.*/
1215 req = list_to_text(headers);
1217 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, http->cmd);
1218 log_error(LOG_LEVEL_ERROR,
1219 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1220 csp->ip_addr_str, http->cmd, req);
1223 strcpy(buf, MISSING_DESTINATION_RESPONSE);
1224 write_socket(csp->cfd, buf, strlen(buf));
1225 free_http_request(http);
1226 destroy_list(headers);
1230 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1231 * to get the destination IP address, use it as host directly
1232 * or do a reverse DNS lookup first.
1236 /* decide how to route the HTTP request */
1238 if ((fwd = forward_url(http, csp)) == NULL)
1240 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1241 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1244 /* build the http request to send to the server
1245 * we have to do one of the following:
1247 * create = use the original HTTP request to create a new
1248 * HTTP request that has either the path component
1249 * without the http://domainspec (w/path) or the
1250 * full orininal URL (w/url)
1251 * Note that the path and/or the HTTP version may
1252 * have been altered by now.
1254 * connect = Open a socket to the host:port of the server
1255 * and short-circuit server and client socket.
1257 * pass = Pass the request unchanged if forwarding a CONNECT
1258 * request to a parent proxy. Note that we'll be sending
1259 * the CFAIL message ourselves if connecting to the parent
1260 * fails, but we won't send a CSUCCEED message if it works,
1261 * since that would result in a double message (ours and the
1262 * parent's). After sending the request to the parent, we simply
1265 * here's the matrix:
1268 * +--------+--------+
1270 * 0 | create | connect|
1272 * Forwarding +--------+--------+
1274 * 1 | create | pass |
1276 * +--------+--------+
1281 * Determine the actions for this URL
1283 #ifdef FEATURE_TOGGLE
1284 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1286 /* Most compatible set of actions (i.e. none) */
1287 init_current_action(csp->action);
1290 #endif /* ndef FEATURE_TOGGLE */
1292 url_actions(http, csp);
1297 * Check if a CONNECT request is allowable:
1298 * In the absence of a +limit-connect action, allow only port 443.
1299 * If there is an action, allow whatever matches the specificaton.
1303 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
1304 || (csp->action->flags & ACTION_LIMIT_CONNECT
1305 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
1307 if (csp->action->flags & ACTION_TREAT_FORBIDDEN_CONNECTS_LIKE_BLOCKS)
1309 /* The response will violate the specs, but makes unblocking easier. */
1310 log_error(LOG_LEVEL_ERROR, "Marking suspicious CONNECT request from %s for blocking.",
1312 csp->action->flags |= ACTION_BLOCK;
1317 strcpy(buf, CFORBIDDEN);
1318 write_socket(csp->cfd, buf, strlen(buf));
1319 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
1320 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
1328 * Downgrade http version from 1.1 to 1.0 if +downgrade
1331 if ( (http->ssl == 0)
1332 && (!strcmpic(http->ver, "HTTP/1.1"))
1333 && (csp->action->flags & ACTION_DOWNGRADE))
1336 http->ver = strdup("HTTP/1.0");
1338 if (http->ver == NULL)
1340 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1345 * Save a copy of the original request for logging
1347 http->ocmd = strdup(http->cmd);
1349 if (http->ocmd == NULL)
1351 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
1355 * (Re)build the HTTP request for non-SSL requests.
1356 * If forwarding, use the whole URL, else, use only the path.
1362 http->cmd = strdup(http->gpc);
1363 string_append(&http->cmd, " ");
1365 if (fwd->forward_host)
1367 string_append(&http->cmd, http->url);
1371 string_append(&http->cmd, http->path);
1373 string_append(&http->cmd, " ");
1374 string_append(&http->cmd, http->ver);
1376 if (http->cmd == NULL)
1378 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1380 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", http->cmd);
1382 enlist(csp->headers, http->cmd);
1384 /* Append the previously read headers */
1385 list_append_list_unique(csp->headers, headers);
1386 destroy_list(headers);
1389 * If the user has not supplied any wafers, and the user has not
1390 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1392 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1393 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1395 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1399 #ifdef FEATURE_KILL_POPUPS
1400 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
1401 #endif /* def FEATURE_KILL_POPUPS */
1403 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
1404 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
1406 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
1408 jpeg_inspect = ((csp->action->flags & ACTION_JPEG_INSPECT) != 0);
1411 * We have a request. Now, check to see if we need to
1412 * intercept it, i.e. If ..
1416 /* We may not forward the request by rfc2616 sect 14.31 */
1417 (NULL != (rsp = direct_response(csp)))
1419 /* or we are enabled and... */
1420 || (IS_ENABLED_AND (
1422 /* ..the request was blocked */
1423 ( NULL != (rsp = block_url(csp)))
1425 /* ..or untrusted */
1426 #ifdef FEATURE_TRUST
1427 || ( NULL != (rsp = trust_url(csp)))
1428 #endif /* def FEATURE_TRUST */
1430 /* ..or a redirect kicked in */
1431 || ( NULL != (rsp = redirect_url(csp)))
1435 * .. or a CGI call was detected and answered.
1437 * This check comes last to give the user the power
1438 * to deny acces to some (or all) of the cgi pages.
1440 || (NULL != (rsp = dispatch_cgi(csp)))
1444 /* Write the answer to the client */
1445 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1446 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1448 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1451 #ifdef FEATURE_STATISTICS
1452 /* Count as a rejected request */
1453 csp->flags |= CSP_FLAG_REJECTED;
1454 #endif /* def FEATURE_STATISTICS */
1456 /* Log (FIXME: All intercept reasons appear as "crunch" with Status 200) */
1457 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
1458 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
1460 /* Clean up and return */
1461 free_http_response(rsp);
1465 hdr = sed(client_patterns, add_client_headers, csp);
1468 /* FIXME Should handle error properly */
1469 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1472 list_remove_all(csp->headers);
1474 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1476 if (fwd->forward_host)
1478 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1479 fwd->forward_host, fwd->forward_port, http->hostport);
1483 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1486 /* here we connect to the server, gateway, or the forwarder */
1488 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
1489 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
1491 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
1492 forwarded_connect_retries, http->hostport);
1495 if (csp->sfd == JB_INVALID_SOCKET)
1497 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1500 if (errno == EINVAL)
1502 rsp = error_response(csp, "no-such-domain", errno);
1504 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
1505 csp->ip_addr_str, http->ocmd);
1509 rsp = error_response(csp, "connect-failed", errno);
1511 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1512 csp->ip_addr_str, http->ocmd);
1516 /* Write the answer to the client */
1519 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1520 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1522 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1526 free_http_response(rsp);
1531 log_error(LOG_LEVEL_CONNECT, "OK");
1533 if (fwd->forward_host || (http->ssl == 0))
1535 /* write the client's (modified) header to the server
1536 * (along with anything else that may be in the buffer)
1539 if (write_socket(csp->sfd, hdr, strlen(hdr))
1540 || (flush_socket(csp->sfd, csp) < 0))
1542 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1545 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1546 csp->ip_addr_str, http->ocmd);
1548 rsp = error_response(csp, "connect-failed", errno);
1552 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1553 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1555 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1559 free_http_response(rsp);
1567 * We're running an SSL tunnel and we're not forwarding,
1568 * so just send the "connect succeeded" message to the
1569 * client, flush the rest, and get out of the way.
1571 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1572 csp->ip_addr_str, http->ocmd);
1574 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
1582 /* we're finished with the client's header */
1585 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1587 /* pass data between the client and server
1588 * until one or the other shuts down the connection.
1597 * FD_ZERO here seems to point to an errant macro which crashes.
1598 * So do this by hand for now...
1600 memset(&rfds,0x00,sizeof(fd_set));
1604 FD_SET(csp->cfd, &rfds);
1605 FD_SET(csp->sfd, &rfds);
1607 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
1611 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1615 /* this is the body of the browser's request
1616 * just read it and write it.
1619 if (FD_ISSET(csp->cfd, &rfds))
1621 len = read_socket(csp->cfd, buf, sizeof(buf));
1625 break; /* "game over, man" */
1628 if (write_socket(csp->sfd, buf, (size_t)len))
1630 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1637 * The server wants to talk. It could be the header or the body.
1638 * If `hdr' is null, then it's the header otherwise it's the body.
1639 * FIXME: Does `hdr' really mean `host'? No.
1643 if (FD_ISSET(csp->sfd, &rfds))
1646 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1650 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1652 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1653 csp->ip_addr_str, http->ocmd);
1655 rsp = error_response(csp, "connect-failed", errno);
1659 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1660 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1662 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1666 free_http_response(rsp);
1670 /* Add a trailing zero. This lets filter_popups
1671 * use string operations.
1675 #ifdef FEATURE_KILL_POPUPS
1676 /* Filter the popups on this read. */
1677 if (block_popups_now)
1679 filter_popups(buf, csp);
1681 #endif /* def FEATURE_KILL_POPUPS */
1683 /* Normally, this would indicate that we've read
1684 * as much as the server has sent us and we can
1685 * close the client connection. However, Microsoft
1686 * in its wisdom has released IIS/5 with a bug that
1687 * prevents it from sending the trailing \r\n in
1688 * a 302 redirect header (and possibly other headers).
1689 * To work around this if we've haven't parsed
1690 * a full header we'll append a trailing \r\n
1691 * and see if this now generates a valid one.
1693 * This hack shouldn't have any impacts. If we've
1694 * already transmitted the header or if this is a
1695 * SSL connection, then we won't bother with this
1696 * hack. So we only work on partially received
1697 * headers. If we append a \r\n and this still
1698 * doesn't generate a valid header, then we won't
1699 * transmit anything to the client.
1704 if (server_body || http->ssl)
1707 * If we have been buffering up the document,
1708 * now is the time to apply content modification
1709 * and send the result to the client.
1714 * If the content filter fails, use the original
1715 * buffer and length.
1716 * (see p != NULL ? p : csp->iob->cur below)
1718 if (NULL == (p = (*content_filter)(csp)))
1720 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
1723 hdr = sed(server_patterns_light, NULL, csp);
1727 /* FIXME Should handle error properly */
1728 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1731 if (write_socket(csp->cfd, hdr, strlen(hdr))
1732 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
1734 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1744 break; /* "game over, man" */
1748 * This is NOT the body, so
1749 * Let's pretend the server just sent us a blank line.
1751 snprintf(buf, sizeof(buf), "\r\n");
1752 len = (int)strlen(buf);
1755 * Now, let the normal header parsing algorithm below do its
1756 * job. If it fails, we'll exit instead of continuing.
1763 * If this is an SSL connection or we're in the body
1764 * of the server document, just write it to the client,
1765 * unless we need to buffer the body for later content-filtering
1768 if (server_body || http->ssl)
1773 * If there is no memory left for buffering the content, or the buffer limit
1774 * has been reached, switch to non-filtering mode, i.e. make & write the
1775 * header, flush the iob and buf, and get out of the way.
1777 if (add_to_iob(csp, buf, len))
1782 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
1784 hdr = sed(server_patterns, add_server_headers, csp);
1788 * Memory is too tight to even generate the header.
1789 * Send our static "Out-of-memory" page.
1791 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
1792 rsp = cgi_error_memory();
1794 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1795 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1797 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1802 hdrlen = strlen(hdr);
1804 if (write_socket(csp->cfd, hdr, hdrlen)
1805 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
1806 || (write_socket(csp->cfd, buf, (size_t)len)))
1808 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
1814 byte_count += hdrlen + (size_t)(flushed + len);
1816 content_filter = NULL;
1823 if (write_socket(csp->cfd, buf, (size_t)len))
1825 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
1829 byte_count += (size_t)len;
1834 /* we're still looking for the end of the
1835 * server's header ... (does that make header
1836 * parsing an "out of body experience" ?
1840 * buffer up the data we just read. If that fails,
1841 * there's little we can do but send our static
1842 * out-of-memory page.
1844 if (add_to_iob(csp, buf, len))
1846 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
1847 rsp = cgi_error_memory();
1849 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1850 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1852 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1857 /* get header lines from the iob */
1859 while ((p = get_header(csp)) != NULL)
1863 /* see following note */
1866 enlist(csp->headers, p);
1870 /* NOTE: there are no "empty" headers so
1871 * if the pointer `p' is not NULL we must
1872 * assume that we reached the end of the
1873 * buffer before we hit the end of the header.
1880 /* Well, we tried our MS IIS/5
1881 * hack and it didn't work.
1882 * The header is incomplete
1883 * and there isn't anything
1884 * we can do about it.
1890 /* Since we have to wait for
1891 * more from the server before
1892 * we can parse the headers
1893 * we just continue here.
1899 /* we have now received the entire header.
1900 * filter it and send the result to the client
1903 hdr = sed(server_patterns, add_server_headers, csp);
1906 /* FIXME Should handle error properly */
1907 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1910 #ifdef FEATURE_KILL_POPUPS
1911 /* Start blocking popups if appropriate. */
1913 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1914 !http->ssl && /* We talk plaintext */
1915 block_popups) /* Policy allows */
1917 block_popups_now = 1;
1919 * Filter the part of the body that came in the same read
1920 * as the last headers:
1922 filter_popups(csp->iob->cur, csp);
1925 #endif /* def FEATURE_KILL_POPUPS */
1927 /* Buffer and pcrs filter this if appropriate. */
1929 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1930 !http->ssl && /* We talk plaintext */
1931 pcrs_filter) /* Policy allows */
1933 content_filter = pcrs_filter_response;
1936 /* Buffer and gif_deanimate this if appropriate. */
1938 if ((csp->content_type & CT_GIF) && /* It's an image/gif MIME-Type */
1939 !http->ssl && /* We talk plaintext */
1940 gif_deanimate) /* Policy allows */
1942 content_filter = gif_deanimate_response;
1945 /* Buffer and jpg_inspect this if appropriate. */
1947 if ((csp->content_type & CT_JPEG) && /* It's an image/jpeg MIME-Type */
1948 !http->ssl && /* We talk plaintext */
1949 jpeg_inspect) /* Policy allows */
1951 content_filter = jpeg_inspect_response;
1955 * Only write if we're not buffering for content modification
1957 if (!content_filter)
1959 /* write the server's (modified) header to
1960 * the client (along with anything else that
1961 * may be in the buffer)
1964 if (write_socket(csp->cfd, hdr, strlen(hdr))
1965 || ((len = flush_socket(csp->cfd, csp)) < 0))
1967 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1969 /* the write failed, so don't bother
1970 * mentioning it to the client...
1971 * it probably can't hear us anyway.
1977 byte_count += (size_t)len;
1980 /* we're finished with the server's header */
1985 /* If this was a MS IIS/5 hack then it means
1986 * the server has already closed the
1987 * connection. Nothing more to read. Time
1998 return; /* huh? we should never get here */
2001 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
2002 csp->ip_addr_str, http->ocmd, byte_count);
2006 /*********************************************************************
2010 * Description : This is little more than chat. We only "serve" to
2011 * to close any socket that chat may have opened.
2014 * 1 : csp = Current client state (buffers, headers, etc...)
2018 *********************************************************************/
2020 void serve(struct client_state *csp)
2021 #else /* ifndef AMIGA */
2022 static void serve(struct client_state *csp)
2023 #endif /* def AMIGA */
2026 close_socket(csp->cfd);
2028 if (csp->sfd != JB_INVALID_SOCKET)
2030 close_socket(csp->sfd);
2033 csp->flags &= ~CSP_FLAG_ACTIVE;
2039 /*********************************************************************
2041 * Function : server_thread
2043 * Description : We only exist to call `serve' in a threaded environment.
2046 * 1 : data = Current client state (buffers, headers, etc...)
2048 * Returns : Always 0.
2050 *********************************************************************/
2051 static int32 server_thread(void *data)
2053 serve((struct client_state *) data);
2060 /*********************************************************************
2064 * Description : Print usage info & exit.
2066 * Parameters : Pointer to argv[0] for identifying ourselves
2070 *********************************************************************/
2071 void usage(const char *myname)
2073 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
2075 "Usage: %s [--help] [--version] [configfile]\n"
2077 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
2079 "Aborting.\n", myname);
2086 /*********************************************************************
2090 * Description : Load the config file and start the listen loop.
2091 * This function is a lot more *sane* with the `load_config'
2092 * and `listen_loop' functions; although it stills does
2093 * a *little* too much for my taste.
2096 * 1 : argc = Number of parameters (including $0).
2097 * 2 : argv = Array of (char *)'s to the parameters.
2099 * Returns : 1 if : can't open config file, unrecognized directive,
2100 * stats requested in multi-thread mode, can't open the
2101 * log file, can't open the jar file, listen port is invalid,
2102 * any load fails, and can't bind port.
2104 * Else main never returns, the process must be signaled
2105 * to terminate execution. Or, on Windows, use the
2106 * "File", "Exit" menu option.
2108 *********************************************************************/
2110 int real_main(int argc, const char *argv[])
2112 int main(int argc, const char *argv[])
2116 unsigned int random_seed;
2118 struct passwd *pw = NULL;
2119 struct group *grp = NULL;
2128 #if !defined(_WIN32)
2136 * Parse the command line arguments
2138 while (++argc_pos < argc)
2141 /* Check to see if the service must be installed or uninstalled */
2142 if (strncmp(argv[argc_pos], "--install", 9) == 0)
2144 const char *pName = argv[argc_pos] + 9;
2147 exit( (install_service(pName)) ? 0 : 1 );
2149 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
2151 const char *pName = argv[argc_pos] + 11;
2154 exit((uninstall_service(pName)) ? 0 : 1);
2156 else if (strcmp(argv[argc_pos], "--service" ) == 0)
2158 bRunAsService = TRUE;
2159 w32_set_service_cwd();
2160 atexit(w32_service_exit_notify);
2163 #endif /* defined(_WIN32) */
2166 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2168 if (strcmp(argv[argc_pos], "--help") == 0)
2173 else if(strcmp(argv[argc_pos], "--version") == 0)
2175 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
2181 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
2186 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
2188 if (++argc_pos == argc) usage(argv[0]);
2189 pidfile = strdup(argv[argc_pos]);
2192 else if (strcmp(argv[argc_pos], "--user" ) == 0)
2194 if (++argc_pos == argc) usage(argv[argc_pos]);
2196 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
2199 if (NULL == (grp = getgrnam(p)))
2201 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
2205 if (NULL == (pw = getpwnam(argv[argc_pos])))
2207 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
2210 if (p != NULL) *--p = '\0';
2213 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
2218 #endif /* defined(unix) */
2219 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
2221 configfile = argv[argc_pos];
2224 } /* -END- while (more arguments) */
2227 if ( *configfile != '/' )
2229 char *abs_file, cwd[1024];
2231 /* make config-filename absolute here */
2232 if ( !(getcwd(cwd, sizeof(cwd))))
2234 perror("get working dir failed");
2238 if (!(basedir = strdup(cwd))
2239 || (!(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))))
2241 perror("malloc failed");
2244 strcpy( abs_file, basedir );
2245 strcat( abs_file, "/" );
2246 strcat( abs_file, configfile );
2247 configfile = abs_file;
2249 #endif /* defined unix */
2253 clients->next = NULL;
2257 #elif defined(_WIN32)
2261 #ifdef FEATURE_PTHREAD
2263 * Prepare global mutex semaphores
2265 pthread_mutex_init(&log_mutex,0);
2266 pthread_mutex_init(&log_init_mutex,0);
2268 #ifndef HAVE_GMTIME_R
2269 pthread_mutex_init(&gmtime_mutex,0);
2270 #endif /* ndef HAVE_GMTIME_R */
2272 #ifndef HAVE_LOCALTIME_R
2273 pthread_mutex_init(&localtime_mutex,0);
2274 #endif /* ndef HAVE_GMTIME_R */
2276 #ifndef HAVE_GETHOSTBYADDR_R
2277 pthread_mutex_init(&gethostbyaddr_mutex,0);
2278 #endif /* ndef HAVE_GETHOSTBYADDR_R */
2280 #ifndef HAVE_GETHOSTBYNAME_R
2281 pthread_mutex_init(&gethostbyname_mutex,0);
2282 #endif /* ndef HAVE_GETHOSTBYNAME_R */
2285 pthread_mutex_init(&rand_mutex,0);
2286 #endif /* ndef HAVE_RANDOM */
2288 #endif /* FEATURE_PTHREAD */
2290 random_seed = (unsigned int)time(NULL);
2292 srandom(random_seed);
2295 #endif /* ifdef HAVE_RANDOM */
2298 * Unix signal handling
2300 * Catch the abort, interrupt and terminate signals for a graceful exit
2301 * Catch the hangup signal so the errlog can be reopened.
2302 * Ignore the broken pipe signals (FIXME: Why?)
2304 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
2307 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
2308 const int ignored_signals[] = { SIGPIPE, 0 };
2310 for (idx = 0; catched_signals[idx] != 0; idx++)
2312 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
2313 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
2315 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
2316 #endif /* ifdef sun */
2318 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
2322 for (idx = 0; ignored_signals[idx] != 0; idx++)
2324 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
2326 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
2331 #else /* ifdef _WIN32 */
2332 # ifdef _WIN_CONSOLE
2334 * We *are* in a windows console app.
2335 * Print a verbose messages about FAQ's and such
2337 printf("%s", win32_blurb);
2338 # endif /* def _WIN_CONSOLE */
2339 #endif /* def _WIN32 */
2342 /* Initialize the CGI subsystem */
2343 cgi_init_error_messages();
2346 * If runnig on unix and without the --nodaemon
2347 * option, become a daemon. I.e. fork, detach
2348 * from tty and get process group leadership
2361 if ( pid < 0 ) /* error */
2366 else if ( pid != 0 ) /* parent */
2371 * must check for errors
2372 * child died due to missing files aso
2375 wpid = waitpid( pid, &status, WNOHANG );
2384 /* Should be more portable, but not as well tested */
2389 #else /* ndef __FreeBSD__ */
2391 #endif /* ndef __FreeBSD__ */
2392 fd = open("/dev/tty", O_RDONLY);
2395 /* no error check here */
2396 ioctl( fd, TIOCNOTTY,0 );
2400 /* FIXME: should close stderr (fd 2) here too, but the test
2402 * and load config file is done in listen_loop() and puts
2403 * some messages on stderr there.
2410 } /* -END- if (!no_daemon) */
2413 * As soon as we have written the PID file, we can switch
2414 * to the user and group ID indicated by the --user option
2420 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
2422 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
2428 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
2430 if (chroot(pw->pw_dir) < 0)
2432 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
2436 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
2439 if (setuid(pw->pw_uid))
2441 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
2445 char putenv_dummy[64];
2447 strcpy(putenv_dummy, "HOME=/");
2448 if (putenv(putenv_dummy) != 0)
2450 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
2453 snprintf(putenv_dummy, 64, "USER=%s", pw->pw_name);
2454 if (putenv(putenv_dummy) != 0)
2456 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
2462 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
2465 #endif /* defined unix */
2468 /* This will be FALSE unless the command line specified --service
2472 /* Yup, so now we must attempt to establish a connection
2473 * with the service dispatcher. This will only work if this
2474 * process was launched by the service control manager to
2475 * actually run as a service. If this isn't the case, i've
2476 * known it take around 30 seconds or so for the call to return.
2479 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
2480 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
2482 /* Service has run, and at this point is now being stopped, so just return */
2487 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
2489 /* An error occurred. Usually it's because --service was wrongly specified
2490 * and we were unable to connect to the Service Control Dispatcher because
2491 * it wasn't expecting us and is therefore not listening.
2493 * For now, just continue below to call the listen_loop function.
2496 #endif /* def _WIN32 */
2506 /*********************************************************************
2508 * Function : bind_port_helper
2510 * Description : Bind the listen port. Handles logging, and aborts
2514 * 1 : config = Privoxy configuration. Specifies port
2517 * Returns : Port that was opened.
2519 *********************************************************************/
2520 static jb_socket bind_port_helper(struct configuration_spec * config)
2525 if ( (config->haddr != NULL)
2526 && (config->haddr[0] == '1')
2527 && (config->haddr[1] == '2')
2528 && (config->haddr[2] == '7')
2529 && (config->haddr[3] == '.') )
2531 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
2534 else if (config->haddr == NULL)
2536 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
2541 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
2542 config->hport, config->haddr);
2545 result = bind_port(config->haddr, config->hport, &bfd);
2552 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2553 "There may be another Privoxy or some other "
2554 "proxy running on port %d",
2555 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
2556 config->hport, config->hport);
2559 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2560 "The hostname is not resolvable",
2561 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2564 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
2565 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2568 /* shouldn't get here */
2569 return JB_INVALID_SOCKET;
2572 config->need_bind = 0;
2579 /* Without this simple workaround we get this compiler warning from _beginthread
2580 * warning C4028: formal parameter 1 different from declaration
2582 void w32_service_listen_loop(void *p)
2586 #endif /* def _WIN32 */
2589 /*********************************************************************
2591 * Function : listen_loop
2593 * Description : bind the listen port and enter a "FOREVER" listening loop.
2599 *********************************************************************/
2600 static void listen_loop(void)
2602 struct client_state *csp = NULL;
2604 struct configuration_spec * config;
2606 config = load_config();
2608 bfd = bind_port_helper(config);
2610 #ifdef FEATURE_GRACEFUL_TERMINATION
2611 while (!g_terminate)
2616 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
2617 while (waitpid(-1, NULL, WNOHANG) > 0)
2619 /* zombie children */
2621 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
2624 * Free data that was used by died threads
2630 * Re-open the errlog after HUP signal
2632 if (received_hup_signal)
2634 init_error_log(Argv[0], config->logfile, config->debug);
2635 received_hup_signal = 0;
2640 #ifdef FEATURE_COOKIE_JAR
2642 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
2643 * already open. I think unload_configfile() is not being run, which should do
2644 * this work. Until that can get resolved, we'll use this workaround.
2648 if (csp->config->jar)
2650 fclose(csp->config->jar);
2651 csp->config->jar = NULL;
2653 #endif /* FEATURE_COOKIE_JAR */
2654 #endif /* __OS2__ */
2656 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
2658 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
2662 csp->flags |= CSP_FLAG_ACTIVE;
2663 csp->sfd = JB_INVALID_SOCKET;
2665 csp->config = config = load_config();
2667 if ( config->need_bind )
2670 * Since we were listening to the "old port", we will not see
2671 * a "listen" param change until the next IJB request. So, at
2672 * least 1 more request must be made for us to find the new
2673 * setting. I am simply closing the old socket and binding the
2676 * Which-ever is correct, we will serve 1 more page via the
2677 * old settings. This should probably be a "show-proxy-args"
2678 * request. This should not be a so common of an operation
2679 * that this will hurt people's feelings.
2684 bfd = bind_port_helper(config);
2687 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
2689 if (!accept_connection(csp, bfd))
2691 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
2704 log_error(LOG_LEVEL_CONNECT, "OK");
2707 #ifdef FEATURE_TOGGLE
2708 if (global_toggle_state)
2710 csp->flags |= CSP_FLAG_TOGGLED_ON;
2712 #endif /* def FEATURE_TOGGLE */
2714 if (run_loader(csp))
2716 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
2717 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2721 if (block_acl(NULL,csp))
2723 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
2724 close_socket(csp->cfd);
2728 #endif /* def FEATURE_ACL */
2730 /* add it to the list of clients */
2731 csp->next = clients->next;
2732 clients->next = csp;
2734 if (config->multi_threaded)
2738 /* this is a switch () statment in the C preprocessor - ugh */
2739 #undef SELECTED_ONE_OPTION
2741 /* Use Pthreads in preference to native code */
2742 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
2743 #define SELECTED_ONE_OPTION
2745 pthread_t the_thread;
2746 pthread_attr_t attrs;
2748 pthread_attr_init(&attrs);
2749 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
2750 errno = pthread_create(&the_thread, &attrs,
2751 (void * (*)(void *))serve, csp);
2752 child_id = errno ? -1 : 0;
2753 pthread_attr_destroy(&attrs);
2757 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
2758 #define SELECTED_ONE_OPTION
2759 child_id = _beginthread(
2760 (void (*)(void *))serve,
2765 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
2766 #define SELECTED_ONE_OPTION
2767 child_id = _beginthread(
2768 (void(* _Optlink)(void*))serve,
2774 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
2775 #define SELECTED_ONE_OPTION
2777 thread_id tid = spawn_thread
2778 (server_thread, "server", B_NORMAL_PRIORITY, csp);
2780 if ((tid >= 0) && (resume_thread(tid) == B_OK))
2782 child_id = (int) tid;
2791 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2792 #define SELECTED_ONE_OPTION
2793 csp->cfd = ReleaseSocket(csp->cfd, -1);
2795 if((child_id = (int)CreateNewProcTags(
2796 NP_Entry, (ULONG)server_thread,
2797 NP_Output, Output(),
2798 NP_CloseOutput, FALSE,
2799 NP_Name, (ULONG)"privoxy child",
2800 NP_StackSize, 200*1024,
2804 ((struct Task *)child_id)->tc_UserData = csp;
2805 Signal((struct Task *)child_id, SIGF_SINGLE);
2810 #if !defined(SELECTED_ONE_OPTION)
2813 /* This block is only needed when using fork().
2814 * When using threads, the server thread was
2815 * created and run by the call to _beginthread().
2817 if (child_id == 0) /* child */
2820 #ifdef FEATURE_TOGGLE
2821 int inherited_toggle_state = global_toggle_state;
2822 #endif /* def FEATURE_TOGGLE */
2827 * If we've been toggled or we've blocked the request, tell Mom
2830 #ifdef FEATURE_TOGGLE
2831 if (inherited_toggle_state != global_toggle_state)
2833 rc |= RC_FLAG_TOGGLED;
2835 #endif /* def FEATURE_TOGGLE */
2837 #ifdef FEATURE_STATISTICS
2838 if (csp->flags & CSP_FLAG_REJECTED)
2840 rc |= RC_FLAG_BLOCKED;
2842 #endif /* ndef FEATURE_STATISTICS */
2846 else if (child_id > 0) /* parent */
2848 /* in a fork()'d environment, the parent's
2849 * copy of the client socket and the CSP
2853 #if !defined(_WIN32) && !defined(__CYGWIN__)
2855 wait( &child_status );
2858 * Evaluate child's return code: If the child has
2859 * - been toggled, toggle ourselves
2860 * - blocked its request, bump up the stats counter
2863 #ifdef FEATURE_TOGGLE
2864 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
2866 global_toggle_state = !global_toggle_state;
2868 #endif /* def FEATURE_TOGGLE */
2870 #ifdef FEATURE_STATISTICS
2872 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
2876 #endif /* def FEATURE_STATISTICS */
2878 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
2879 close_socket(csp->cfd);
2880 csp->flags &= ~CSP_FLAG_ACTIVE;
2884 #undef SELECTED_ONE_OPTION
2885 /* end of cpp switch () */
2887 if (child_id < 0) /* failed */
2889 char buf[BUFFER_SIZE];
2891 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
2893 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
2895 write_socket(csp->cfd, buf, strlen(buf));
2896 close_socket(csp->cfd);
2897 csp->flags &= ~CSP_FLAG_ACTIVE;
2908 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
2910 /* Clean up. Aim: free all memory (no leaks) */
2911 #ifdef FEATURE_GRACEFUL_TERMINATION
2913 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
2915 unload_current_config_file();
2916 unload_current_actions_file();
2917 unload_current_re_filterfile();
2918 #ifdef FEATURE_TRUST
2919 unload_current_trust_file();
2922 if (config->multi_threaded)
2929 } while ((clients->next != NULL) && (--i > 0));
2933 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
2944 #ifdef FEATURE_COOKIE_JAR
2945 if (NULL != config->jar)
2947 fclose(config->jar);
2951 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
2952 /* Cleanup - remove taskbar icon etc. */
2957 #endif /* FEATURE_GRACEFUL_TERMINATION */