1 const char jcc_rcs[] = "$Id: jcc.c,v 1.137 2007/06/01 18:16:36 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) 2001-2007 the SourceForge
10 * Privoxy team. http://www.privoxy.org/
12 * Based on the Internet Junkbuster originally written
13 * by and Copyright (C) 1997 Anonymous Coders and
14 * Junkbusters Corporation. http://www.junkbusters.com
16 * This program is free software; you can redistribute it
17 * and/or modify it under the terms of the GNU General
18 * Public License as published by the Free Software
19 * Foundation; either version 2 of the License, or (at
20 * your option) any later version.
22 * This program is distributed in the hope that it will
23 * be useful, but WITHOUT ANY WARRANTY; without even the
24 * implied warranty of MERCHANTABILITY or FITNESS FOR A
25 * PARTICULAR PURPOSE. See the GNU General Public
26 * License for more details.
28 * The GNU General Public License should be included with
29 * this file. If not, you can view it at
30 * http://www.gnu.org/copyleft/gpl.html
31 * or write to the Free Software Foundation, Inc., 59
32 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
36 * Revision 1.137 2007/06/01 18:16:36 fabiankeil
37 * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
38 * deadlocks and crashes on OpenBSD and possibly other OS with neither
39 * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
40 * Thanks to Ralf Horstmann for report and solution.
42 * Revision 1.136 2007/06/01 16:41:11 fabiankeil
43 * Add forward-override{} to change the forwarding settings through
44 * action sections. This is mainly interesting to forward different
45 * clients differently (for example based on User-Agent or request
48 * Revision 1.135 2007/05/24 17:03:50 fabiankeil
49 * - Let usage() mention the --chroot parameter.
50 * - Use read_socket() consistently and always leave
51 * the last buffer byte alone, even in cases where
52 * null termination (currently) doesn't matter.
54 * Revision 1.134 2007/05/16 14:59:46 fabiankeil
55 * - Fix config file loading on Unix if no config file is specified.
56 * Since r1.97 Privoxy would always interpret the last argument as
57 * config file, even if it's a valid command line option.
58 * - Abort in case of unrecognized command line options. Closes #1719696.
59 * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
60 * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
62 * Revision 1.133 2007/05/04 11:23:19 fabiankeil
63 * - Don't rerun crunchers that only depend on the request URL.
64 * - Don't count redirects and CGI requests as "blocked requests".
66 * Revision 1.132 2007/04/25 15:15:17 fabiankeil
67 * Support crunching based on tags created by server-header taggers.
69 * Revision 1.131 2007/04/22 13:24:50 fabiankeil
70 * Make HTTP snippets static (again). Add a Content-Type for those
71 * with content so the browser doesn't guess it based on the URL.
73 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
74 * Move crunching and request line rebuilding out of chat().
76 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
77 * Introduce tags as alternative way to specify which
78 * actions apply to a request. At the moment tags can be
79 * created based on client and server headers.
81 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
82 * Don't CLF-log CONNECT requests twice.
84 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
85 * Log the source address for ACL-related connection drops.
87 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
88 * New config option: enforce-blocks.
90 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
91 * - Move null byte check into separate function.
92 * - Don't confuse the client with error pages
93 * if a CONNECT request was already confirmed.
95 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
96 * Speed up NULL byte escaping and only log the complete
97 * NULL byte requests with header debugging enabled.
99 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
100 * Answer requests that contain NULL bytes with
101 * a custom response instead of waiting for more
102 * data until the client eventually hangs up.
104 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
105 * - Move delivery and logging of crunched responses
106 * from chat() into send_crunch_response().
107 * - Display the reason for generating http_responses.
108 * - Log the content length for LOG_LEVEL_CLF correctly
109 * (still incorrect for some fixed responses).
110 * - Reword an incorrect comment about
111 * treat-forbidden-connects-like-blocks violating
113 * - Add some log messages.
115 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
116 * Move mutex initialization into separate
117 * function and exit in case of errors.
119 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
120 * - Start to reduce chat()'s line count and move
121 * parts of it into separate functions.
122 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
124 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
125 * - Add Proxy-Agent header to HTTP snippets that are
126 * supposed to reach HTTP clients only.
127 * - Made a few CONNECT log messages more descriptive.
128 * - Catch completely empty server responses (as seen
129 * with Tor's fake ".noconnect" top level domain).
130 * - Use shiny new "forwarding-failed" template for socks errors.
132 * Revision 1.118 2007/01/07 07:43:43 joergs
133 * AmigaOS4 support added.
135 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
136 * Added config option accept-intercepted-requests
137 * and disabled it by default.
139 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
140 * Reverted parts of my last commit
141 * to keep error handling working.
143 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
144 * Fixed gcc43 conversion warnings.
146 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
147 * Fix -pedantic ISO C warning about converting
148 * from function pointer to object pointer.
150 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
151 * Silence compiler warning I introduced with my last commit.
153 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
154 * Mutex protect rand() if POSIX threading
155 * is used, warn the user if that's not possible
156 * and stop using it on _WIN32 where it could
159 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
160 * Don't prevent core dumps by catching SIGABRT.
161 * It's rude and makes debugging unreasonable painful.
163 * Revision 1.110 2006/12/13 14:52:53 etresoft
164 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
166 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
167 * Privoxy is now able to run as intercepting
168 * proxy in combination with any packet filter
169 * that does the port redirection. The destination
170 * is extracted from the "Host:" header which
171 * should be available for nearly all requests.
173 * Moved HTTP snipplets into jcc.c.
174 * Added error message for gopher proxy requests.
176 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
177 * Only unlink the pidfile if it's actually used.
179 * Change order of interception checks to make
180 * it possible to block or redirect requests for
183 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
184 * Make pthread mutex locking more generic. Instead of
185 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
186 * and use mutex locking unless there is an _r function
187 * available. Better safe than sorry.
189 * Fixes "./configure --disable-pthread" and should result
190 * in less threading-related problems on pthread-using platforms,
191 * but it still doesn't fix BR#1122404.
193 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
194 * Move pthread.h inclusion from jcc.c to jcc.h.
195 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
197 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
198 * Don't exit after receiving the second SIGHUP on Solaris.
200 * Fixes BR 1052235, but the same problem may exist on other
201 * systems. Once 3.0.6 is out we should use sigset()
202 * where available and see if it breaks anything.
204 * Revision 1.104 2006/09/23 13:26:38 roro
205 * Replace TABs by spaces in source code.
207 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
208 * Fix +redirect{}. Didn't work with -fast-redirects.
210 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
211 * Respond with 400 and a short text message
212 * if the client tries to use Privoxy as FTP proxy.
214 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
215 * Make number of retries in case of forwarded-connect problems
216 * a config file option (forwarded-connect-retries) and use 0 as
219 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
220 * Set random(3) seed.
222 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
223 * Follow the OpenBSD port's lead and protect the resolve
224 * functions on OpenBSD as well.
226 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
227 * --user fix. Only use the user as group if no group is specified.
228 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
230 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
231 * Windows service (re-)integration
235 * --install[:service_name]
236 * --uninstall[:service_name]
239 * They work as follows:
240 * --install will create a service for you and then terminate.
241 * By default the service name will be "privoxy" (without the quotes).
242 * However you can run multiple services if you wish, just by adding
243 * a colon and then a name (no spaces).
245 * --uninstall follows the exact same rules a --install.
247 * --service is used when the program is executed by the service
248 * control manager, and in normal circumstances would never be
249 * used as a command line argument.
251 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
252 * Windows service integration
254 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
255 * Incorporate Fabian Keil's patch work:
256 http://www.fabiankeil.de/sourcecode/privoxy/
258 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
259 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
260 * with what was really the latest development (the v_3_0_branch branch)
262 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
263 * Thanks to Jindrich Makovicka for a race condition fix for the log
264 * file. The race condition remains for non-pthread implementations.
265 * Reference patch #1175720.
267 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
268 * Add the ability to check jpeg images for invalid
269 * lengths of comment blocks. Defensive strategy
270 * against the exploit:
271 * Microsoft Security Bulletin MS04-028
272 * Buffer Overrun in JPEG Processing (GDI+) Could
273 * Allow Code Execution (833987)
274 * Enabled with +inspect-jpegs in actions files.
276 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
277 * - Fixed usage info for non-unix platforms
278 * - Fixed small cmdline parsing bug
280 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
281 * Diagnostics: Now preserve the returncode of pthread_create
282 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
284 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
285 * No longer ignore SIGCHLD. Fixes bug #769381
287 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
288 * Close jarfile on graceful exit, remove stray line
290 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
291 * Cosmetics: Killed a warning, a typo and an allocation left at exit
293 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
294 * No longer rely on non-POSIX.1 extensions of getcwd().
297 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
298 * Replaced setenv() by posix-compliant putenv()
299 * Thanks to Neil McCalden (nmcc AT users.sf.net).
301 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
302 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
304 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
305 * Clean-up and extension of improvements for forked mode:
306 * - Child's return code now consists of flags RC_FLAG_*
307 * - Reporting toggle to parent now properly #ifdef'ed
308 * - Children now report blocking to parent. This enables
309 * statistics in forked mode
311 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
312 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
313 * Children now report having been toggled through _exit(17), parents
314 * watch for that code and toggle themselves if found.
316 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
317 * Wrapping all *_r functions (the non-_r versions of them) with
318 * mutex semaphores for OSX. Hopefully this will take care of all
319 * of those pesky crash reports.
321 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
322 * Fixed two mostly harmless mem leaks
324 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
325 * Fix: Head of global clients list now initialized to NULL
327 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
328 * Added basic support for OPTIONS and TRACE HTTP methods:
329 * - New interceptor direct_response() added in chat().
330 * - sed() moved to earlier in the process, so that the
331 * Host: header is evaluated before actions and forwarding
334 * Revision 1.92 2002/05/08 16:00:46 oes
335 * Chat's buffer handling:
336 * - Fixed bug with unchecked out-of-mem conditions
337 * while reading client request & server headers
338 * - No longer predict if the buffer limit will be exceeded
339 * in the next read -- check add_to_iob's new
340 * return code. If buffer couldn't be extended
341 * (policy or out-of-mem) while
342 * - reading from client: abort
343 * - reading server headers: send error page
344 * - buffering server body for filter: flush,
345 * and if that fails: send error page
347 * Revision 1.91 2002/04/08 20:35:58 swa
350 * Revision 1.90 2002/04/02 14:57:28 oes
351 * Made sending wafers independent of FEATURE_COOKIE_JAR
353 * Revision 1.89 2002/03/31 17:18:59 jongfoster
354 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
356 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
357 * More compiler warning message maintenance
359 * Revision 1.87 2002/03/26 22:29:54 swa
360 * we have a new homepage!
362 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
363 * Workaround for closing the jarfile before load_config() comes around again
365 * Revision 1.85 2002/03/24 15:23:33 jongfoster
368 * Revision 1.84 2002/03/24 13:25:43 swa
369 * name change related issues
371 * Revision 1.83 2002/03/16 23:54:06 jongfoster
372 * Adding graceful termination feature, to help look for memory leaks.
373 * If you enable this (which, by design, has to be done by hand
374 * editing config.h) and then go to http://i.j.b/die, then the program
375 * will exit cleanly after the *next* request. It should free all the
376 * memory that was used.
378 * Revision 1.82 2002/03/13 00:27:05 jongfoster
381 * Revision 1.81 2002/03/12 01:42:50 oes
382 * Introduced modular filters
384 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
385 * OS/2 port maintenance:
386 * - Fixed EMX build - it had decayed a little
387 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
388 * substituted a memset for now.
390 * Revision 1.79 2002/03/09 20:03:52 jongfoster
391 * - Making various functions return int rather than size_t.
392 * (Undoing a recent change). Since size_t is unsigned on
393 * Windows, functions like read_socket that return -1 on
394 * error cannot return a size_t.
396 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
397 * crashes, and also frequently caused JB to jump to 100%
398 * CPU and stay there. (Because it thought it had just
399 * read ((unsigned)-1) == 4Gb of data...)
401 * - The signature of write_socket has changed, it now simply
402 * returns success=0/failure=nonzero.
404 * - Trying to get rid of a few warnings --with-debug on
405 * Windows, I've introduced a new type "jb_socket". This is
406 * used for the socket file descriptors. On Windows, this
407 * is SOCKET (a typedef for unsigned). Everywhere else, it's
408 * an int. The error value can't be -1 any more, so it's
409 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
410 * Windows it maps to the #define INVALID_SOCKET.)
412 * - The signature of bind_port has changed.
414 * Revision 1.78 2002/03/08 21:35:04 oes
415 * Added optional group supplement to --user option. Will now use default group of user if no group given
417 * Revision 1.77 2002/03/07 03:52:06 oes
418 * - Fixed compiler warnings etc
419 * - Improved handling of failed DNS lookups
421 * Revision 1.76 2002/03/06 22:54:35 jongfoster
422 * Automated function-comment nitpicking.
424 * Revision 1.75 2002/03/06 10:02:19 oes
425 * Fixed stupid bug when --user was not given
427 * Revision 1.74 2002/03/06 00:49:31 jongfoster
428 * Fixing warning on Windows
429 * Making #ifdefs that refer to the same variable consistently
430 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
432 * Revision 1.73 2002/03/05 23:57:30 hal9
433 * Stray character 's' on line 1618 was breaking build.
435 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
436 * - Re-enable OS/2 building after new parms were added
437 * - Fix false out of memory report when resolving CGI templates when no IP
438 * address is available of failed attempt (a la no such domain)
440 * Revision 1.71 2002/03/05 18:13:56 oes
441 * Added --user option
443 * Revision 1.70 2002/03/05 04:52:42 oes
444 * Deleted non-errlog debugging code
446 * Revision 1.69 2002/03/04 23:50:00 jongfoster
447 * Splitting off bind_port() call into bind_port_helper(), with
450 * Revision 1.68 2002/03/04 20:17:32 oes
453 * Revision 1.67 2002/03/04 18:18:57 oes
454 * - Removed _DEBUG mode
455 * - Cleand up cmdline parsing
456 * - Introduced --no-daemon, --pidfile options
457 * - Cleaned up signal handling:
458 * - Terminate cleanly on INT, TERM and ABRT
459 * - Schedule logfile for re-opening on HUP
460 * - Ignore CHLD and PIPE
461 * - Leave the rest with their default handlers
462 * - Uniform handler registration
463 * - Added usage() function
464 * - Played styleguide police
466 * Revision 1.66 2002/03/03 15:06:55 oes
467 * Re-enabled automatic config reloading
469 * Revision 1.65 2002/03/03 14:49:11 oes
470 * Fixed CLF logging: Now uses client's original HTTP request
472 * Revision 1.64 2002/03/03 09:18:03 joergs
473 * Made jumbjuster work on AmigaOS again.
475 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
476 * Clean up a little CRLF unpleasantness that suddenly appeared
478 * Revision 1.62 2002/02/20 23:17:23 jongfoster
479 * Detecting some out-of memory conditions and exiting with a log message.
481 * Revision 1.61 2002/01/17 21:01:52 jongfoster
482 * Moving all our URL and URL pattern parsing code to urlmatch.c.
484 * Revision 1.60 2001/12/30 14:07:32 steudten
485 * - Add signal handling (unix)
486 * - Add SIGHUP handler (unix)
487 * - Add creation of pidfile (unix)
488 * - Add action 'top' in rc file (RH)
489 * - Add entry 'SIGNALS' to manpage
490 * - Add exit message to logfile (unix)
492 * Revision 1.59 2001/12/13 14:07:18 oes
493 * Fixed Bug: 503 error page now sent OK
495 * Revision 1.58 2001/11/30 23:37:24 jongfoster
496 * Renaming the Win32 config file to config.txt - this is almost the
497 * same as the corresponding UNIX name "config"
499 * Revision 1.57 2001/11/16 00:47:43 jongfoster
500 * Changing the tty-disconnection code to use setsid().
502 * Revision 1.56 2001/11/13 20:20:54 jongfoster
503 * Tabs->spaces, fixing a bug with missing {} around an if()
505 * Revision 1.55 2001/11/13 20:14:53 jongfoster
506 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
508 * Revision 1.54 2001/11/07 00:03:14 steudten
509 * Give reliable return value if an error
510 * occurs not just 0 with new daemon mode.
512 * Revision 1.53 2001/11/05 21:41:43 steudten
513 * Add changes to be a real daemon just for unix os.
514 * (change cwd to /, detach from controlling tty, set
515 * process group and session leader to the own process.
517 * Add some fatal-error log message for failed malloc().
518 * Add '-d' if compiled with 'configure --with-debug' to
519 * enable debug output.
521 * Revision 1.52 2001/10/26 20:11:20 jongfoster
522 * Fixing type mismatch
524 * Revision 1.51 2001/10/26 17:38:28 oes
527 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
528 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
529 * threads to call select() simultaneously. So, it's time to do a real, live,
530 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
531 * (native). Both versions will work, but using __OS2__ offers multi-threading.
533 * Revision 1.49 2001/10/23 21:41:35 jongfoster
534 * Added call to initialize the (statically-allocated of course)
535 * "out of memory" CGI response.
537 * Revision 1.48 2001/10/10 19:56:46 jongfoster
538 * Moving some code that wasn't cookie-related out of an #ifdef
541 * Revision 1.47 2001/10/10 16:44:36 oes
542 * Added CONNECT destination port limitation check
544 * Revision 1.46 2001/10/08 15:17:41 oes
545 * Re-enabled SSL forwarding
547 * Revision 1.45 2001/10/07 15:42:11 oes
548 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
550 * Moved downgrading of the HTTP version from parse_http_request to
551 * chat(), since we can't decide if it is necessary before we have
552 * determined the actions for the URL. The HTTP command is now
553 * *always* re-built so the repairs need no longer be special-cased.
555 * filter_popups now gets a csp pointer so it can raise the new
556 * CSP_FLAG_MODIFIED flag.
560 * Added configurable size limit for the IOB. If the IOB grows so
561 * large that the next read would exceed the limit, the header
562 * is generated, and the header & unfiltered buffer are flushed
563 * to the client. Chat then continues in non-buffering,
564 * non-filtering body mode.
566 * Revision 1.44 2001/10/02 18:13:57 oes
569 * Revision 1.43 2001/10/02 15:32:13 oes
570 * Moved generation of hdr
572 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
573 * Cleaning up 2 compiler warnings on OS/2.
575 * Revision 1.41 2001/09/16 17:05:14 jongfoster
576 * Removing unused #include showarg.h
578 * Revision 1.40 2001/09/16 15:41:45 jongfoster
579 * Fixing signed/unsigned comparison warning.
581 * Revision 1.39 2001/09/16 13:21:27 jongfoster
582 * Changes to use new list functions.
584 * Revision 1.38 2001/09/16 13:01:46 jongfoster
585 * Removing redundant function call that zeroed zalloc()'d memory.
587 * Revision 1.37 2001/09/10 11:12:24 oes
588 * Deleted unused variable
590 * Revision 1.36 2001/09/10 10:56:15 oes
591 * Silenced compiler warnings
593 * Revision 1.35 2001/07/31 14:44:22 oes
594 * Deleted unused size parameter from filter_popups()
596 * Revision 1.34 2001/07/30 22:08:36 jongfoster
597 * Tidying up #defines:
598 * - All feature #defines are now of the form FEATURE_xxx
599 * - Permanently turned off WIN_GUI_EDIT
600 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
602 * Revision 1.33 2001/07/29 19:32:00 jongfoster
603 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
605 * Revision 1.32 2001/07/29 18:47:05 jongfoster
606 * Adding missing #include "loadcfg.h"
608 * Revision 1.31 2001/07/29 12:17:48 oes
609 * Applied pthread fix by Paul Lieverse
611 * Revision 1.30 2001/07/25 22:57:13 jongfoster
612 * __BEOS__ no longer overrides FEATURE_PTHREAD.
613 * This is because FEATURE_PTHREAD will soon be widely used, so I
614 * want to keep it simple.
616 * Revision 1.29 2001/07/24 12:47:06 oes
617 * Applied BeOS support update by Eugenia
619 * Revision 1.28 2001/07/23 13:26:12 oes
620 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
622 * Revision 1.27 2001/07/19 19:09:47 haroon
623 * - Added code to take care of the situation where while processing the first
624 * server response (which includes the server header), after finding the end
625 * of the headers we were not looking past the end of the headers for
626 * content modification. I enabled it for filter_popups.
627 * Someone else should look to see if other similar operations should be
628 * done to the discarded portion of the buffer.
630 * Note 2001/07/20: No, the other content modification mechanisms will process
631 * the whole iob later anyway. --oes
633 * Revision 1.26 2001/07/18 12:31:36 oes
636 * Revision 1.25 2001/07/15 19:43:49 jongfoster
637 * Supports POSIX threads.
638 * Also removed some unused #includes.
640 * Revision 1.24 2001/07/13 14:00:40 oes
641 * - Generic content modification scheme:
642 * Each feature has its own applicability flag that is set
643 * from csp->action->flags.
644 * Replaced the "filtering" int flag , by a function pointer
645 * "content_filter" to the function that will do the content
646 * modification. If it is != NULL, the document will be buffered
647 * and processed through *content_filter, which must set
648 * csp->content_length and return a modified copy of the body
649 * or return NULL (on failiure).
650 * - Changed csp->is_text to the more generic bitmap csp->content_type
651 * which can currently take the valued CT_TEXT or CT_GIF
653 * - Removed all #ifdef PCRS
655 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
656 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
657 * the `block_acl' call. This prevents a compilation error when the user
658 * does not wish to use the "ACL" feature.
660 * Revision 1.22 2001/06/29 21:45:41 oes
661 * Indentation, CRLF->LF, Tab-> Space
663 * Revision 1.21 2001/06/29 13:29:36 oes
664 * - Cleaned up, improved comments
665 * - Unified all possible interceptors (CGI,
666 * block, trust, fast_redirect) in one
667 * place, with one (CGI) answer generation
668 * mechansim. Much clearer now.
669 * - Removed the GIF image generation, which
670 * is now done in filters.c:block_url()
671 * - Made error conditions like domain lookup
672 * failiure or (various) problems while talking
673 * to the server use cgi.c:error_response()
674 * instead of generating HTML/HTTP in chat() (yuck!)
675 * - Removed logentry from cancelled commit
677 * Revision 1.20 2001/06/09 10:55:28 jongfoster
678 * Changing BUFSIZ ==> BUFFER_SIZE
680 * Revision 1.19 2001/06/07 23:12:52 jongfoster
681 * Replacing function pointer in struct gateway with a directly
682 * called function forwarded_connect().
683 * Replacing struct gateway with struct forward_spec
685 * Revision 1.18 2001/06/03 19:12:16 oes
686 * introduced new cgi handling
688 * Revision 1.17 2001/06/01 20:07:23 jongfoster
689 * Now uses action +image-blocker{} rather than config->tinygif
691 * Revision 1.16 2001/06/01 18:49:17 jongfoster
692 * Replaced "list_share" with "list" - the tiny memory gain was not
693 * worth the extra complexity.
695 * Revision 1.15 2001/05/31 21:24:47 jongfoster
696 * Changed "permission" to "action" throughout.
697 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
698 * Moved vanilla wafer check into chat(), since we must now
699 * decide whether or not to add it based on the URL.
701 * Revision 1.14 2001/05/29 20:14:01 joergs
702 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
705 * Revision 1.13 2001/05/29 09:50:24 jongfoster
706 * Unified blocklist/imagelist/permissionslist.
707 * File format is still under discussion, but the internal changes
710 * Also modified interceptor behaviour:
711 * - We now intercept all URLs beginning with one of the following
712 * prefixes (and *only* these prefixes):
714 * * http://ijbswa.sf.net/config/
715 * * http://ijbswa.sourceforge.net/config/
716 * - New interceptors "home page" - go to http://i.j.b/ to see it.
717 * - Internal changes so that intercepted and fast redirect pages
718 * are not replaced with an image.
719 * - Interceptors now have the option to send a binary page direct
720 * to the client. (i.e. ijb-send-banner uses this)
721 * - Implemented show-url-info interceptor. (Which is why I needed
722 * the above interceptors changes - a typical URL is
723 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
724 * The previous mechanism would not have intercepted that, and
725 * if it had been intercepted then it then it would have replaced
728 * Revision 1.12 2001/05/27 22:17:04 oes
730 * - re_process_buffer no longer writes the modified buffer
731 * to the client, which was very ugly. It now returns the
732 * buffer, which it is then written by chat.
734 * - content_length now adjusts the Content-Length: header
735 * for modified documents rather than crunch()ing it.
736 * (Length info in csp->content_length, which is 0 for
737 * unmodified documents)
739 * - For this to work, sed() is called twice when filtering.
741 * Revision 1.11 2001/05/26 17:27:53 jongfoster
742 * Added support for CLF and fixed LOG_LEVEL_LOG.
743 * Also did CRLF->LF fix of my previous patch.
745 * Revision 1.10 2001/05/26 15:26:15 jongfoster
746 * ACL feature now provides more security by immediately dropping
747 * connections from untrusted hosts.
749 * Revision 1.9 2001/05/26 00:28:36 jongfoster
750 * Automatic reloading of config file.
751 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
752 * Most of the global variables have been moved to a new
753 * struct configuration_spec, accessed through csp->config->globalname
754 * Most of the globals remaining are used by the Win32 GUI.
756 * Revision 1.8 2001/05/25 22:43:18 jongfoster
757 * Fixing minor memory leak and buffer overflow.
759 * Revision 1.7 2001/05/25 22:34:30 jongfoster
762 * Revision 1.6 2001/05/23 00:13:58 joergs
763 * AmigaOS support fixed.
765 * Revision 1.5 2001/05/22 18:46:04 oes
767 * - Enabled filtering banners by size rather than URL
768 * by adding patterns that replace all standard banner
769 * sizes with the "Junkbuster" gif to the re_filterfile
771 * - Enabled filtering WebBugs by providing a pattern
772 * which kills all 1x1 images
774 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
775 * which is selected by the (nonstandard and therefore
776 * capital) letter 'U' in the option string.
777 * It causes the quantifiers to be ungreedy by default.
778 * Appending a ? turns back to greedy (!).
780 * - Added a new interceptor ijb-send-banner, which
781 * sends back the "Junkbuster" gif. Without imagelist or
782 * MSIE detection support, or if tinygif = 1, or the
783 * URL isn't recognized as an imageurl, a lame HTML
784 * explanation is sent instead.
786 * - Added new feature, which permits blocking remote
787 * script redirects and firing back a local redirect
789 * The feature is conditionally compiled, i.e. it
790 * can be disabled with --disable-fast-redirects,
791 * plus it must be activated by a "fast-redirects"
792 * line in the config file, has its own log level
793 * and of course wants to be displayed by show-proxy-args
794 * Note: Boy, all the #ifdefs in 1001 locations and
795 * all the fumbling with configure.in and acconfig.h
796 * were *way* more work than the feature itself :-(
798 * - Because a generic redirect template was needed for
799 * this, tinygif = 3 now uses the same.
801 * - Moved GIFs, and other static HTTP response templates
806 * - Removed some >400 CRs again (Jon, you really worked
809 * Revision 1.4 2001/05/21 19:34:01 jongfoster
810 * Made failure to bind() a fatal error.
812 * Revision 1.3 2001/05/20 01:21:20 jongfoster
813 * Version 2.9.4 checkin.
814 * - Merged popupfile and cookiefile, and added control over PCRS
815 * filtering, in new "permissionsfile".
816 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
817 * file error you now get a message box (in the Win32 GUI) rather
818 * than the program exiting with no explanation.
819 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
821 * - Removed tabs from "config"
822 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
823 * - Bumped up version number.
825 * Revision 1.2 2001/05/17 22:34:44 oes
826 * - Added hint on GIF char array generation to jcc.c
827 * - Cleaned CRLF's from the sources and related files
828 * - Repaired logging for REF and FRC
830 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
831 * Initial import of version 2.9.3 source tree
834 *********************************************************************/
840 #include <sys/types.h>
849 # ifndef FEATURE_PTHREAD
853 # include <windows.h>
854 # include <process.h>
855 # endif /* ndef FEATURE_PTHREAD */
858 # ifndef _WIN_CONSOLE
860 # endif /* ndef _WIN_CONSOLE */
861 # include "w32svrapi.h"
863 #else /* ifndef _WIN32 */
865 # if !defined (__OS2__)
867 # include <sys/wait.h>
868 # endif /* ndef __OS2__ */
869 # include <sys/time.h>
870 # include <sys/stat.h>
871 # include <sys/ioctl.h>
874 #include <sys/termios.h>
885 # include <socket.h> /* BeOS has select() for sockets only. */
886 # include <OS.h> /* declarations for threads and stuff. */
889 # if defined(__EMX__) || defined(__OS2__)
890 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
895 #define bzero(B,N) memset(B,0x00,n)
910 #include "killpopup.h"
911 #include "miscutil.h"
913 #include "jbsockets.h"
918 #include "urlmatch.h"
920 const char jcc_h_rcs[] = JCC_H_VERSION;
921 const char project_h_rcs[] = PROJECT_H_VERSION;
924 struct client_state clients[1];
925 struct file_list files[1];
927 #ifdef FEATURE_STATISTICS
928 int urls_read = 0; /* total nr of urls read inc rejected */
929 int urls_rejected = 0; /* total nr of urls rejected */
930 #endif /* def FEATURE_STATISTICS */
932 #ifdef FEATURE_GRACEFUL_TERMINATION
936 static void listen_loop(void);
937 static void chat(struct client_state *csp);
939 void serve(struct client_state *csp);
940 #else /* ifndef AMIGA */
941 static void serve(struct client_state *csp);
942 #endif /* def AMIGA */
945 static int32 server_thread(void *data);
946 #endif /* def __BEOS__ */
949 #define sleep(N) Sleep(((N) * 1000))
953 #define sleep(N) DosSleep(((N) * 100))
956 #ifdef FEATURE_PTHREAD
957 pthread_mutex_t log_mutex;
958 pthread_mutex_t log_init_mutex;
960 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
961 pthread_mutex_t resolver_mutex;
962 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
964 #ifndef HAVE_GMTIME_R
965 pthread_mutex_t gmtime_mutex;
966 #endif /* ndef HAVE_GMTIME_R */
968 #ifndef HAVE_LOCALTIME_R
969 pthread_mutex_t localtime_mutex;
970 #endif /* ndef HAVE_GMTIME_R */
973 pthread_mutex_t rand_mutex;
974 #endif /* ndef HAVE_RANDOM */
976 #endif /* FEATURE_PTHREAD */
978 #if defined(unix) || defined(__EMX__)
979 const char *basedir = NULL;
980 const char *pidfile = NULL;
981 int received_hup_signal = 0;
982 #endif /* defined unix */
984 /* The vanilla wafer. */
985 static const char VANILLA_WAFER[] =
986 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
987 "Do_not_send_me_any_copyrighted_information_other_than_the_"
988 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
989 "In_particular_do_not_send_me_any_cookies_that_"
990 "are_subject_to_a_claim_of_copyright_by_anybody._"
991 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
992 "(copyright_or_otherwise)_applying_to_any_cookie._";
994 /* HTTP snipplets. */
995 const static char CSUCCEED[] =
996 "HTTP/1.0 200 Connection established\n"
997 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
999 const static char CHEADER[] =
1000 "HTTP/1.0 400 Invalid header received from browser\r\n"
1001 "Proxy-Agent: Privoxy " VERSION "\r\n"
1002 "Content-Type: text/plain\r\n"
1003 "Connection: close\r\n\r\n"
1004 "Invalid header received from browser.\r\n";
1006 const static char CFORBIDDEN[] =
1007 "HTTP/1.0 403 Connection not allowable\r\n"
1008 "Proxy-Agent: Privoxy " VERSION "\r\n"
1009 "X-Hint: If you read this message interactively, then you know why this happens ,-)\r\n"
1010 "Connection: close\r\n\r\n";
1012 const static char FTP_RESPONSE[] =
1013 "HTTP/1.0 400 Invalid request received from browser\r\n"
1014 "Content-Type: text/plain\r\n"
1015 "Connection: close\r\n\r\n"
1016 "Invalid request. Privoxy doesn't support FTP.\r\n";
1018 const static char GOPHER_RESPONSE[] =
1019 "HTTP/1.0 400 Invalid request received from browser\r\n"
1020 "Content-Type: text/plain\r\n"
1021 "Connection: close\r\n\r\n"
1022 "Invalid request. Privoxy doesn't support gopher.\r\n";
1024 /* XXX: should be a template */
1025 const static char MISSING_DESTINATION_RESPONSE[] =
1026 "HTTP/1.0 400 Bad request received from browser\r\n"
1027 "Proxy-Agent: Privoxy " VERSION "\r\n"
1028 "Content-Type: text/plain\r\n"
1029 "Connection: close\r\n\r\n"
1030 "Bad request. Privoxy was unable to extract the destination.\r\n";
1032 /* XXX: should be a template */
1033 const static char NO_SERVER_DATA_RESPONSE[] =
1034 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1035 "Proxy-Agent: Privoxy " VERSION "\r\n"
1036 "Content-Type: text/plain\r\n"
1037 "Connection: close\r\n\r\n"
1038 "Empty server or forwarder response.\r\n"
1039 "The connection was closed without sending any data.\r\n";
1041 /* XXX: should be a template */
1042 const static char NULL_BYTE_RESPONSE[] =
1043 "HTTP/1.0 400 Bad request received from browser\r\n"
1044 "Proxy-Agent: Privoxy " VERSION "\r\n"
1045 "Content-Type: text/plain\r\n"
1046 "Connection: close\r\n\r\n"
1047 "Bad request. Null byte(s) before end of request.\r\n";
1049 /* A function to crunch a response */
1050 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
1052 /* Crunch function flags */
1053 #define CF_NO_FLAGS 0
1054 /* Cruncher applies to forced requests as well */
1055 #define CF_IGNORE_FORCE 1
1056 /* Crunched requests are counted for the block statistics */
1057 #define CF_COUNT_AS_REJECT 2
1059 /* A crunch function and its flags */
1062 const crunch_func_ptr cruncher;
1066 /* Complete list of cruncher functions */
1067 const static struct cruncher crunchers_all[] = {
1068 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
1069 { block_url, CF_COUNT_AS_REJECT },
1070 #ifdef FEATURE_TRUST
1071 { trust_url, CF_COUNT_AS_REJECT },
1072 #endif /* def FEATURE_TRUST */
1073 { redirect_url, CF_NO_FLAGS },
1074 { dispatch_cgi, CF_IGNORE_FORCE},
1078 /* Light version, used after tags are applied */
1079 const static struct cruncher crunchers_light[] = {
1080 { block_url, CF_COUNT_AS_REJECT },
1081 { redirect_url, CF_NO_FLAGS },
1086 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1087 /*********************************************************************
1089 * Function : sig_handler
1091 * Description : Signal handler for different signals.
1092 * Exit gracefully on TERM and INT
1093 * or set a flag that will cause the errlog
1094 * to be reopened by the main thread on HUP.
1097 * 1 : the_signal = the signal cause this function to call
1101 *********************************************************************/
1102 static void sig_handler(int the_signal)
1108 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1119 received_hup_signal = 1;
1124 * We shouldn't be here, unless we catch signals
1125 * in main() that we can't handle here!
1127 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1135 /*********************************************************************
1137 * Function : client_protocol_is_unsupported
1139 * Description : Checks if the client used a known unsupported
1140 * protocol and deals with it by sending an error
1144 * 1 : csp = Current client state (buffers, headers, etc...)
1145 * 2 : req = the first request line send by the client
1147 * Returns : TRUE if an error response has been generated, or
1148 * FALSE if the request doesn't look invalid.
1150 *********************************************************************/
1151 int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1153 char buf[BUFFER_SIZE];
1156 * If it's a FTP or gopher request, we don't support it.
1158 * These checks are better than nothing, but they might
1159 * not work in all configurations and some clients might
1160 * have problems digesting the answer.
1162 * They should, however, never cause more problems than
1163 * Privoxy's old behaviour (returning the misleading HTML
1166 * "Could not resolve http://(ftp|gopher)://example.org").
1168 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1170 if (!strncmpic(req, "GET ftp://", 10))
1172 strlcpy(buf, FTP_RESPONSE, sizeof(buf));
1173 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as FTP proxy: %s",
1174 csp->ip_addr_str, req);
1178 strlcpy(buf, GOPHER_RESPONSE, sizeof(buf));
1179 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as gopher proxy: %s",
1180 csp->ip_addr_str, req);
1182 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1184 write_socket(csp->cfd, buf, strlen(buf));
1193 /*********************************************************************
1195 * Function : get_request_destination_elsewhere
1197 * Description : If the client's request was redirected into
1198 * Privoxy without the client's knowledge,
1199 * the request line lacks the destination host.
1201 * This function tries to get it elsewhere,
1202 * provided accept-intercepted-requests is enabled.
1204 * "Elsewhere" currently only means "Host: header",
1205 * but in the future we may ask the redirecting
1206 * packet filter to look the destination up.
1208 * If the destination stays unknown, an error
1209 * response is send to the client and headers
1210 * are freed so that chat() can return directly.
1213 * 1 : csp = Current client state (buffers, headers, etc...)
1214 * 2 : headers = a header list
1216 * Returns : JB_ERR_OK if the destination is now known, or
1217 * JB_ERR_PARSE if it isn't.
1219 *********************************************************************/
1220 jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1224 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1226 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1227 " Privoxy isn't configured to accept intercepted requests.",
1228 csp->ip_addr_str, csp->http->cmd);
1229 /* XXX: Use correct size */
1230 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1231 csp->ip_addr_str, csp->http->cmd);
1233 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1234 destroy_list(headers);
1236 return JB_ERR_PARSE;
1238 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1240 /* Split the domain we just got for pattern matching */
1241 init_domain_components(csp->http);
1247 /* We can't work without destination. Go spread the news.*/
1249 req = list_to_text(headers);
1251 /* XXX: Use correct size */
1252 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1253 csp->ip_addr_str, csp->http->cmd);
1254 log_error(LOG_LEVEL_ERROR,
1255 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1256 csp->ip_addr_str, csp->http->cmd, req);
1259 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
1260 destroy_list(headers);
1262 return JB_ERR_PARSE;
1265 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1266 * to get the destination IP address, use it as host directly
1267 * or do a reverse DNS lookup first.
1272 /*********************************************************************
1274 * Function : get_server_headers
1276 * Description : Parses server headers in iob and fills them
1277 * into csp->headers so that they can later be
1281 * 1 : csp = Current client state (buffers, headers, etc...)
1283 * Returns : JB_ERR_OK if everything went fine, or
1284 * JB_ERR_PARSE if the headers were incomplete.
1286 *********************************************************************/
1287 jb_err get_server_headers(struct client_state *csp)
1289 int continue_hack_in_da_house = 0;
1292 while (((header = get_header(csp)) != NULL) || continue_hack_in_da_house)
1297 * continue hack in da house. Ignore the ending of
1298 * this head and continue enlisting header lines.
1299 * The reason is described below.
1301 enlist(csp->headers, "");
1302 continue_hack_in_da_house = 0;
1305 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1308 * It's a bodyless continue response, don't
1309 * stop header parsing after reaching it's end.
1311 * As a result Privoxy will concatenate the
1312 * next response's head and parse and deliver
1313 * the headers as if they belonged to one request.
1315 * The client will separate them because of the
1316 * empty line between them.
1318 * XXX: What we're doing here is clearly against
1319 * the intended purpose of the continue header,
1320 * and under some conditions (HTTP/1.0 client request)
1321 * it's a standard violation.
1323 * Anyway, "sort of against the spec" is preferable
1324 * to "always getting confused by Continue responses"
1325 * (Privoxy's behaviour before this hack was added)
1327 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1328 continue_hack_in_da_house = 1;
1330 else if (*header == '\0')
1333 * If the header is empty, but the Continue hack
1334 * isn't active, we can assume that we reached the
1335 * end of the buffer before we hit the end of the
1338 * Inform the caller an let it decide how to handle it.
1340 return JB_ERR_PARSE;
1344 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1347 * XXX: Should we quit the request and return a
1348 * out of memory error page instead?
1350 log_error(LOG_LEVEL_ERROR,
1351 "Out of memory while enlisting server headers. %s lost.",
1361 /*********************************************************************
1363 * Function : crunch_reason
1365 * Description : Translates the crunch reason code into a string.
1368 * 1 : rsp = a http_response
1370 * Returns : A string with the crunch reason or an error description.
1372 *********************************************************************/
1373 const char *crunch_reason(const struct http_response *rsp)
1375 char * reason = NULL;
1377 assert(rsp != NULL);
1380 return "Internal error while searching for crunch reason";
1383 switch (rsp->reason)
1385 case RSP_REASON_UNSUPPORTED:
1386 reason = "Unsupported HTTP feature";
1388 case RSP_REASON_BLOCKED:
1391 case RSP_REASON_UNTRUSTED:
1392 reason = "Untrusted";
1394 case RSP_REASON_REDIRECTED:
1395 reason = "Redirected";
1397 case RSP_REASON_CGI_CALL:
1398 reason = "CGI Call";
1400 case RSP_REASON_NO_SUCH_DOMAIN:
1401 reason = "DNS failure";
1403 case RSP_REASON_FORWARDING_FAILED:
1404 reason = "Forwarding failed";
1406 case RSP_REASON_CONNECT_FAILED:
1407 reason = "Connection failure";
1409 case RSP_REASON_OUT_OF_MEMORY:
1410 reason = "Out of memory (may mask other reasons)";
1413 reason = "No reason recorded";
1421 /*********************************************************************
1423 * Function : send_crunch_response
1425 * Description : Delivers already prepared response for
1426 * intercepted requests, logs the interception
1427 * and frees the response.
1430 * 1 : csp = Current client state (buffers, headers, etc...)
1431 * 1 : rsp = Fully prepared response. Will be freed on exit.
1433 * Returns : Nothing.
1435 *********************************************************************/
1436 void send_crunch_response(struct client_state *csp, struct http_response *rsp)
1438 const struct http_request *http = csp->http;
1439 char status_code[4];
1441 assert(rsp != NULL);
1442 assert(rsp->head != NULL);
1447 * Not supposed to happen. If it does
1448 * anyway, treat it as an unknown error.
1450 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1451 /* return code doesn't matter */
1456 /* If rsp is still NULL, we have serious internal problems. */
1457 log_error(LOG_LEVEL_FATAL,
1458 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1462 * Extract the status code from the actual head
1463 * that was send to the client. It is the only
1464 * way to get it right for all requests, including
1465 * the fixed ones for out-of-memory problems.
1467 * A head starts like this: 'HTTP/1.1 200...'
1471 status_code[0] = rsp->head[9];
1472 status_code[1] = rsp->head[10];
1473 status_code[2] = rsp->head[11];
1474 status_code[3] = '\0';
1476 /* Write the answer to the client */
1477 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1478 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1480 /* There is nothing we can do about it. */
1481 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1484 /* Log that the request was crunched and why. */
1485 log_error(LOG_LEVEL_GPC, "%s%s crunch! (%s)",
1486 http->hostport, http->path, crunch_reason(rsp));
1487 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %d",
1488 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1490 /* Clean up and return */
1491 if (cgi_error_memory() != rsp)
1493 free_http_response(rsp);
1499 /*********************************************************************
1501 * Function : request_contains_null_bytes
1503 * Description : Checks for NULL bytes in the request and sends
1504 * an error message to the client if any were found.
1507 * 1 : csp = Current client state (buffers, headers, etc...)
1508 * 2 : buf = Data from the client's request to check.
1509 * 3 : len = The data length.
1511 * Returns : TRUE if the request contained one or more NULL bytes, or
1514 *********************************************************************/
1515 int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1517 size_t c_len; /* Request lenght when treated as C string */
1519 c_len = strlen(buf);
1524 * Null byte(s) found. Log the request,
1525 * return an error response and hang up.
1527 size_t tmp_len = c_len;
1532 * Replace NULL byte(s) with '°' characters
1533 * so the request can be logged as string.
1534 * XXX: Is there a better replacement character?
1537 tmp_len += strlen(buf+tmp_len);
1538 } while (tmp_len < len);
1540 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1541 "(length=%d, strlen=%d).", csp->ip_addr_str, len, c_len);
1542 log_error(LOG_LEVEL_HEADER,
1543 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1545 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
1547 /* XXX: Log correct size */
1548 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1557 /*********************************************************************
1559 * Function : crunch_response_triggered
1561 * Description : Checks if the request has to be crunched,
1562 * and delivers the crunch response if necessary.
1565 * 1 : csp = Current client state (buffers, headers, etc...)
1566 * 2 : crunchers = list of cruncher functions to run
1568 * Returns : TRUE if the request was answered with a crunch response
1571 *********************************************************************/
1572 int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
1574 struct http_response *rsp = NULL;
1575 const struct cruncher *c;
1577 for (c = crunchers; c->cruncher != NULL; c++)
1580 * Check the cruncher if either Privoxy is toggled
1581 * on and the request isn't forced, or if the cruncher
1582 * applies to forced requests as well.
1584 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
1585 !(csp->flags & CSP_FLAG_FORCED)) ||
1586 (c->flags & CF_IGNORE_FORCE))
1588 rsp = c->cruncher(csp);
1591 /* Deliver, log and free the interception response. */
1592 send_crunch_response(csp, rsp);
1593 #ifdef FEATURE_STATISTICS
1594 if (c->flags & CF_COUNT_AS_REJECT)
1596 csp->flags |= CSP_FLAG_REJECTED;
1598 #endif /* def FEATURE_STATISTICS */
1609 /*********************************************************************
1611 * Function : build_request_line
1613 * Description : Builds the HTTP request line.
1615 * If a HTTP forwarder is used it expects the whole URL,
1616 * web servers only get the path.
1619 * 1 : csp = Current client state (buffers, headers, etc...)
1620 * 2 : fwd = The forwarding spec used for the request
1621 * XXX: Should use http->fwd instead.
1622 * 3 : request_line = The old request line which will be replaced.
1624 * Returns : Nothing. Terminates in case of memory problems.
1626 *********************************************************************/
1627 void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
1629 struct http_request *http = csp->http;
1631 assert(http->ssl == 0);
1634 * Downgrade http version from 1.1 to 1.0
1635 * if +downgrade action applies.
1637 if ( (csp->action->flags & ACTION_DOWNGRADE)
1638 && (!strcmpic(http->ver, "HTTP/1.1")))
1641 http->ver = strdup("HTTP/1.0");
1643 if (http->ver == NULL)
1645 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1650 * Rebuild the request line.
1652 freez(*request_line);
1653 *request_line = strdup(http->gpc);
1654 string_append(request_line, " ");
1656 if (fwd->forward_host)
1658 string_append(request_line, http->url);
1662 string_append(request_line, http->path);
1664 string_append(request_line, " ");
1665 string_append(request_line, http->ver);
1667 if (*request_line == NULL)
1669 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1671 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
1675 /*********************************************************************
1679 * Description : Once a connection to the client has been accepted,
1680 * this function is called (via serve()) to handle the
1681 * main business of the communication. When this
1682 * function returns, the caller must close the client
1685 * FIXME: chat is nearly thousand lines long.
1689 * 1 : csp = Current client state (buffers, headers, etc...)
1691 * Returns : Nothing.
1693 *********************************************************************/
1694 static void chat(struct client_state *csp)
1696 char buf[BUFFER_SIZE];
1704 int ms_iis5_hack = 0;
1705 size_t byte_count = 0;
1706 int forwarded_connect_retries = 0;
1707 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
1708 const struct forward_spec * fwd;
1709 struct http_request *http;
1710 int len; /* for buffer sizes (and negative error codes) */
1711 #ifdef FEATURE_KILL_POPUPS
1712 int block_popups; /* bool, 1==will block popups */
1713 int block_popups_now = 0; /* bool, 1==currently blocking popups */
1714 #endif /* def FEATURE_KILL_POPUPS */
1716 int pcrs_filter; /* bool, 1==will filter through pcrs */
1717 int gif_deanimate; /* bool, 1==will deanimate gifs */
1718 int jpeg_inspect; /* bool, 1==will inspect jpegs */
1720 /* Function that does the content filtering for the current request */
1721 char *(*content_filter)() = NULL;
1723 /* Skeleton for HTTP response, if we should intercept the request */
1724 struct http_response *rsp;
1726 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1727 struct list header_list;
1728 struct list *headers = &header_list;
1732 memset(buf, 0, sizeof(buf));
1735 * Read the client's request. Note that since we're not using select() we
1736 * could get blocked here if a client connected, then didn't say anything!
1741 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1743 if (len <= 0) break; /* error! */
1747 * XXX: Temporary disabled to prevent problems
1748 * with POST requests whose bodies are allowed to
1749 * contain NULL bytes. BR#1730105.
1751 * The main purpose of this check is to properly
1752 * log stuff like BitTorrent traffic and other junk
1753 * that hits public proxies. It's not required for
1754 * Privoxy to functions as those requests are discarded
1757 * It probably should be rewritten to only check
1758 * the head of the request. Another option would
1759 * be to let all POST requests pass, although that
1760 * may not be good enough.
1762 if (request_contains_null_bytes(csp, buf, len))
1764 /* NULL bytes found and dealt with, just hang up. */
1770 * If there is no memory left for buffering the
1771 * request, there is nothing we can do but hang up
1773 if (add_to_iob(csp, buf, len))
1778 req = get_header(csp);
1782 break; /* no HTTP request! */
1787 continue; /* more to come! */
1790 /* Does the request line look invalid? */
1791 if (client_protocol_is_unsupported(csp, req))
1794 * Yes. The request has already been
1795 * answered with a error response, the buffers
1796 * were freed and we're done with chatting.
1801 #ifdef FEATURE_FORCE_LOAD
1803 * If this request contains the FORCE_PREFIX and blocks
1804 * aren't enforced, get rid of it and set the force flag.
1806 if (strstr(req, FORCE_PREFIX))
1808 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
1810 log_error(LOG_LEVEL_FORCE,
1811 "Ignored force prefix in request: \"%s\".", req);
1815 strclean(req, FORCE_PREFIX);
1816 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
1817 csp->flags |= CSP_FLAG_FORCED;
1821 #endif /* def FEATURE_FORCE_LOAD */
1823 switch( parse_http_request(req, http, csp) )
1826 log_error(LOG_LEVEL_ERROR, "Out of memory while parsing request.");
1829 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", req);
1837 if (http->cmd == NULL)
1839 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1840 /* XXX: Use correct size */
1841 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1842 log_error(LOG_LEVEL_ERROR, "Invalid header received from %s.", csp->ip_addr_str);
1844 free_http_request(http);
1848 /* grab the rest of the client's headers */
1852 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1854 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1857 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1862 * If there is no memory left for buffering the
1863 * request, there is nothing we can do but hang up
1865 if (add_to_iob(csp, buf, len))
1872 if (p == NULL) break;
1879 if (http->host == NULL)
1882 * If we still don't know the request destination,
1883 * the request is invalid or the client uses
1884 * Privoxy without its knowledge.
1886 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
1889 * Our attempts to get the request destination
1890 * elsewhere failed or Privoxy is configured
1891 * to only accept proxy requests.
1893 * An error response has already been send
1894 * and we're done here.
1901 * Determine the actions for this URL
1903 #ifdef FEATURE_TOGGLE
1904 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1906 /* Most compatible set of actions (i.e. none) */
1907 init_current_action(csp->action);
1910 #endif /* ndef FEATURE_TOGGLE */
1912 url_actions(http, csp);
1916 * Save a copy of the original request for logging
1918 http->ocmd = strdup(http->cmd);
1920 if (http->ocmd == NULL)
1922 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
1925 enlist(csp->headers, http->cmd);
1927 /* Append the previously read headers */
1928 list_append_list_unique(csp->headers, headers);
1929 destroy_list(headers);
1932 * If the user has not supplied any wafers, and the user has not
1933 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1935 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1936 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1938 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1941 if (JB_ERR_OK != sed(client_patterns, add_client_headers, csp))
1943 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers");
1945 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
1947 /* decide how to route the HTTP request */
1948 if (NULL == (fwd = forward_url(http, csp)))
1950 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1951 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1954 /* build the http request to send to the server
1955 * we have to do one of the following:
1957 * create = use the original HTTP request to create a new
1958 * HTTP request that has either the path component
1959 * without the http://domainspec (w/path) or the
1960 * full orininal URL (w/url)
1961 * Note that the path and/or the HTTP version may
1962 * have been altered by now.
1964 * connect = Open a socket to the host:port of the server
1965 * and short-circuit server and client socket.
1967 * pass = Pass the request unchanged if forwarding a CONNECT
1968 * request to a parent proxy. Note that we'll be sending
1969 * the CFAIL message ourselves if connecting to the parent
1970 * fails, but we won't send a CSUCCEED message if it works,
1971 * since that would result in a double message (ours and the
1972 * parent's). After sending the request to the parent, we simply
1975 * here's the matrix:
1978 * +--------+--------+
1980 * 0 | create | connect|
1982 * Forwarding +--------+--------+
1984 * 1 | create | pass |
1986 * +--------+--------+
1991 * Check if a CONNECT request is allowable:
1992 * In the absence of a +limit-connect action, allow only port 443.
1993 * If there is an action, allow whatever matches the specificaton.
1997 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
1998 || (csp->action->flags & ACTION_LIMIT_CONNECT
1999 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
2001 if (csp->action->flags & ACTION_TREAT_FORBIDDEN_CONNECTS_LIKE_BLOCKS)
2004 * The response may confuse some clients,
2005 * but makes unblocking easier.
2007 log_error(LOG_LEVEL_ERROR, "Marking suspicious CONNECT request from %s for blocking.",
2009 csp->action->flags |= ACTION_BLOCK;
2014 write_socket(csp->cfd, CFORBIDDEN, strlen(CFORBIDDEN));
2015 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
2016 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
2018 list_remove_all(csp->headers);
2027 freez(csp->headers->first->str);
2028 build_request_line(csp, fwd, &csp->headers->first->str);
2031 hdr = list_to_text(csp->headers);
2034 /* FIXME Should handle error properly */
2035 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2038 #ifdef FEATURE_KILL_POPUPS
2039 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
2040 #endif /* def FEATURE_KILL_POPUPS */
2042 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
2043 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
2045 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
2047 jpeg_inspect = ((csp->action->flags & ACTION_JPEG_INSPECT) != 0);
2050 * We have a request. Check if one of the crunchers wants it.
2052 if (crunch_response_triggered(csp, crunchers_all))
2055 * Yes. The client got the crunch response
2056 * and we are done here after cleaning up.
2059 list_remove_all(csp->headers);
2065 * The headers can't be removed earlier because
2066 * they were still needed for the referrer check
2067 * in case of CGI crunches.
2069 * XXX: Would it be worth to move the referrer check
2070 * into client_referrer() and set a flag if it's trusted?
2072 list_remove_all(csp->headers);
2074 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2076 if (fwd->forward_host)
2078 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2079 fwd->forward_host, fwd->forward_port, http->hostport);
2083 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2086 /* here we connect to the server, gateway, or the forwarder */
2088 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
2089 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2091 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
2092 forwarded_connect_retries, http->hostport);
2095 if (csp->sfd == JB_INVALID_SOCKET)
2097 if (fwd->type != SOCKS_NONE)
2100 rsp = error_response(csp, "forwarding-failed", errno);
2102 else if (errno == EINVAL)
2104 rsp = error_response(csp, "no-such-domain", errno);
2108 rsp = error_response(csp, "connect-failed", errno);
2109 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2114 /* Write the answer to the client */
2117 send_crunch_response(csp, rsp);
2124 if (fwd->forward_host || (http->ssl == 0))
2126 /* write the client's (modified) header to the server
2127 * (along with anything else that may be in the buffer)
2130 if (write_socket(csp->sfd, hdr, strlen(hdr))
2131 || (flush_socket(csp->sfd, csp) < 0))
2133 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
2136 rsp = error_response(csp, "connect-failed", errno);
2140 send_crunch_response(csp, rsp);
2150 * We're running an SSL tunnel and we're not forwarding,
2151 * so just send the "connect succeeded" message to the
2152 * client, flush the rest, and get out of the way.
2154 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
2162 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2164 /* we're finished with the client's header */
2167 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
2169 /* pass data between the client and server
2170 * until one or the other shuts down the connection.
2179 * FD_ZERO here seems to point to an errant macro which crashes.
2180 * So do this by hand for now...
2182 memset(&rfds,0x00,sizeof(fd_set));
2186 FD_SET(csp->cfd, &rfds);
2187 FD_SET(csp->sfd, &rfds);
2189 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
2193 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2197 /* this is the body of the browser's request
2198 * just read it and write it.
2201 if (FD_ISSET(csp->cfd, &rfds))
2203 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2207 break; /* "game over, man" */
2210 if (write_socket(csp->sfd, buf, (size_t)len))
2212 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2219 * The server wants to talk. It could be the header or the body.
2220 * If `hdr' is null, then it's the header otherwise it's the body.
2221 * FIXME: Does `hdr' really mean `host'? No.
2225 if (FD_ISSET(csp->sfd, &rfds))
2228 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2232 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2234 if (http->ssl && (fwd->forward_host == NULL))
2237 * Just hang up. We already confirmed the client's CONNECT
2238 * request with status code 200 and unencrypted content is
2239 * no longer welcome.
2241 log_error(LOG_LEVEL_ERROR,
2242 "CONNECT already confirmed. Unable to tell the client about the problem.");
2246 rsp = error_response(csp, "connect-failed", errno);
2250 send_crunch_response(csp, rsp);
2256 /* Add a trailing zero. This lets filter_popups
2257 * use string operations.
2261 #ifdef FEATURE_KILL_POPUPS
2262 /* Filter the popups on this read. */
2263 if (block_popups_now)
2265 filter_popups(buf, csp);
2267 #endif /* def FEATURE_KILL_POPUPS */
2269 /* Normally, this would indicate that we've read
2270 * as much as the server has sent us and we can
2271 * close the client connection. However, Microsoft
2272 * in its wisdom has released IIS/5 with a bug that
2273 * prevents it from sending the trailing \r\n in
2274 * a 302 redirect header (and possibly other headers).
2275 * To work around this if we've haven't parsed
2276 * a full header we'll append a trailing \r\n
2277 * and see if this now generates a valid one.
2279 * This hack shouldn't have any impacts. If we've
2280 * already transmitted the header or if this is a
2281 * SSL connection, then we won't bother with this
2282 * hack. So we only work on partially received
2283 * headers. If we append a \r\n and this still
2284 * doesn't generate a valid header, then we won't
2285 * transmit anything to the client.
2290 if (server_body || http->ssl)
2293 * If we have been buffering up the document,
2294 * now is the time to apply content modification
2295 * and send the result to the client.
2300 * If the content filter fails, use the original
2301 * buffer and length.
2302 * (see p != NULL ? p : csp->iob->cur below)
2304 if (NULL == (p = (*content_filter)(csp)))
2306 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2309 if (JB_ERR_OK != sed(server_patterns_light, NULL, csp))
2311 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
2314 hdr = list_to_text(csp->headers);
2317 /* FIXME Should handle error properly */
2318 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2322 * Shouldn't happen because this was the second sed run
2323 * and tags are only created for the first one.
2325 assert(!crunch_response_triggered(csp, crunchers_all));
2327 if (write_socket(csp->cfd, hdr, strlen(hdr))
2328 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
2330 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2340 break; /* "game over, man" */
2344 * This is NOT the body, so
2345 * Let's pretend the server just sent us a blank line.
2347 snprintf(buf, sizeof(buf), "\r\n");
2348 len = (int)strlen(buf);
2351 * Now, let the normal header parsing algorithm below do its
2352 * job. If it fails, we'll exit instead of continuing.
2359 * If this is an SSL connection or we're in the body
2360 * of the server document, just write it to the client,
2361 * unless we need to buffer the body for later content-filtering
2364 if (server_body || http->ssl)
2369 * If there is no memory left for buffering the content, or the buffer limit
2370 * has been reached, switch to non-filtering mode, i.e. make & write the
2371 * header, flush the iob and buf, and get out of the way.
2373 if (add_to_iob(csp, buf, len))
2378 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
2379 if (JB_ERR_OK != sed(server_patterns, add_server_headers, csp))
2381 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
2383 hdr = list_to_text(csp->headers);
2387 * Memory is too tight to even generate the header.
2388 * Send our static "Out-of-memory" page.
2390 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2391 rsp = cgi_error_memory();
2392 send_crunch_response(csp, rsp);
2397 if (crunch_response_triggered(csp, crunchers_light))
2400 * One of the tags created by a server-header
2401 * tagger triggered a crunch. We already
2402 * delivered the crunch response to the client
2403 * and are done here after cleaning up.
2409 hdrlen = strlen(hdr);
2411 if (write_socket(csp->cfd, hdr, hdrlen)
2412 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
2413 || (write_socket(csp->cfd, buf, (size_t)len)))
2415 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
2421 byte_count += hdrlen + (size_t)flushed + (size_t)len;
2423 content_filter = NULL;
2430 if (write_socket(csp->cfd, buf, (size_t)len))
2432 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2436 byte_count += (size_t)len;
2441 /* we're still looking for the end of the
2442 * server's header ... (does that make header
2443 * parsing an "out of body experience" ?
2447 * buffer up the data we just read. If that fails,
2448 * there's little we can do but send our static
2449 * out-of-memory page.
2451 if (add_to_iob(csp, buf, len))
2453 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2454 rsp = cgi_error_memory();
2455 send_crunch_response(csp, rsp);
2460 /* Convert iob into something sed() can digest */
2461 if (JB_ERR_PARSE == get_server_headers(csp))
2465 /* Well, we tried our MS IIS/5
2466 * hack and it didn't work.
2467 * The header is incomplete
2468 * and there isn't anything
2469 * we can do about it.
2475 /* Since we have to wait for
2476 * more from the server before
2477 * we can parse the headers
2478 * we just continue here.
2484 /* Did we actually get anything? */
2485 if (NULL == csp->headers->first)
2487 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
2488 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2489 write_socket(csp->cfd, NO_SERVER_DATA_RESPONSE, strlen(NO_SERVER_DATA_RESPONSE));
2490 free_http_request(http);
2494 /* we have now received the entire header.
2495 * filter it and send the result to the client
2497 if (JB_ERR_OK != sed(server_patterns, add_server_headers, csp))
2499 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
2501 hdr = list_to_text(csp->headers);
2504 /* FIXME Should handle error properly */
2505 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2508 if (crunch_response_triggered(csp, crunchers_light))
2511 * One of the tags created by a server-header
2512 * tagger triggered a crunch. We already
2513 * delivered the crunch response to the client
2514 * and are done here after cleaning up.
2519 #ifdef FEATURE_KILL_POPUPS
2520 /* Start blocking popups if appropriate. */
2522 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
2523 !http->ssl && /* We talk plaintext */
2524 block_popups) /* Policy allows */
2526 block_popups_now = 1;
2528 * Filter the part of the body that came in the same read
2529 * as the last headers:
2531 filter_popups(csp->iob->cur, csp);
2534 #endif /* def FEATURE_KILL_POPUPS */
2536 /* Buffer and pcrs filter this if appropriate. */
2538 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
2539 !http->ssl && /* We talk plaintext */
2540 pcrs_filter) /* Policy allows */
2542 content_filter = pcrs_filter_response;
2545 /* Buffer and gif_deanimate this if appropriate. */
2547 if ((csp->content_type & CT_GIF) && /* It's an image/gif MIME-Type */
2548 !http->ssl && /* We talk plaintext */
2549 gif_deanimate) /* Policy allows */
2551 content_filter = gif_deanimate_response;
2554 /* Buffer and jpg_inspect this if appropriate. */
2556 if ((csp->content_type & CT_JPEG) && /* It's an image/jpeg MIME-Type */
2557 !http->ssl && /* We talk plaintext */
2558 jpeg_inspect) /* Policy allows */
2560 content_filter = jpeg_inspect_response;
2564 * Only write if we're not buffering for content modification
2566 if (!content_filter)
2568 /* write the server's (modified) header to
2569 * the client (along with anything else that
2570 * may be in the buffer)
2573 if (write_socket(csp->cfd, hdr, strlen(hdr))
2574 || ((len = flush_socket(csp->cfd, csp)) < 0))
2576 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
2578 /* the write failed, so don't bother
2579 * mentioning it to the client...
2580 * it probably can't hear us anyway.
2586 byte_count += (size_t)len;
2589 /* we're finished with the server's header */
2594 /* If this was a MS IIS/5 hack then it means
2595 * the server has already closed the
2596 * connection. Nothing more to read. Time
2607 return; /* huh? we should never get here */
2610 if (csp->content_length == 0)
2613 * If Privoxy didn't recalculate the
2614 * Content-Lenght, byte_count is still
2617 csp->content_length = byte_count;
2620 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
2621 csp->ip_addr_str, http->ocmd, csp->content_length);
2625 /*********************************************************************
2629 * Description : This is little more than chat. We only "serve" to
2630 * to close any socket that chat may have opened.
2633 * 1 : csp = Current client state (buffers, headers, etc...)
2637 *********************************************************************/
2639 void serve(struct client_state *csp)
2640 #else /* ifndef AMIGA */
2641 static void serve(struct client_state *csp)
2642 #endif /* def AMIGA */
2645 close_socket(csp->cfd);
2647 if (csp->sfd != JB_INVALID_SOCKET)
2649 close_socket(csp->sfd);
2652 csp->flags &= ~CSP_FLAG_ACTIVE;
2658 /*********************************************************************
2660 * Function : server_thread
2662 * Description : We only exist to call `serve' in a threaded environment.
2665 * 1 : data = Current client state (buffers, headers, etc...)
2667 * Returns : Always 0.
2669 *********************************************************************/
2670 static int32 server_thread(void *data)
2672 serve((struct client_state *) data);
2679 /*********************************************************************
2683 * Description : Print usage info & exit.
2685 * Parameters : Pointer to argv[0] for identifying ourselves
2689 *********************************************************************/
2690 void usage(const char *myname)
2692 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
2696 #endif /* defined(unix) */
2699 "[--no-daemon] [--pidfile pidfile] [--user user[.group]] "
2700 #endif /* defined(unix) */
2701 "[--version] [configfile]\n"
2702 "Aborting\n", myname);
2709 /*********************************************************************
2711 * Function : initialize_mutexes
2713 * Description : Prepares mutexes if mutex support is available.
2717 * Returns : Void, exits in case of errors.
2719 *********************************************************************/
2720 void initialize_mutexes()
2724 #ifdef FEATURE_PTHREAD
2726 * Prepare global mutex semaphores
2728 err = pthread_mutex_init(&log_mutex, 0);
2730 if (!err) err = pthread_mutex_init(&log_init_mutex, 0);
2733 * XXX: The assumptions below are a bit naive
2734 * and can cause locks that aren't necessary.
2736 * For example older FreeBSD versions (< 6.x?)
2737 * have no gethostbyname_r, but gethostbyname is
2740 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
2741 if (!err) err = pthread_mutex_init(&resolver_mutex, 0);
2742 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
2744 * XXX: should we use a single mutex for
2745 * localtime() and gmtime() as well?
2747 #ifndef HAVE_GMTIME_R
2748 if (!err) err = pthread_mutex_init(&gmtime_mutex, 0);
2749 #endif /* ndef HAVE_GMTIME_R */
2751 #ifndef HAVE_LOCALTIME_R
2752 if (!err) err = pthread_mutex_init(&localtime_mutex, 0);
2753 #endif /* ndef HAVE_GMTIME_R */
2756 if (!err) err = pthread_mutex_init(&rand_mutex, 0);
2757 #endif /* ndef HAVE_RANDOM */
2758 #endif /* FEATURE_PTHREAD */
2761 * TODO: mutex support for mingw32 would be swell.
2766 printf("Fatal error. Mutex initialization failed: %s.\n",
2775 /*********************************************************************
2779 * Description : Load the config file and start the listen loop.
2780 * This function is a lot more *sane* with the `load_config'
2781 * and `listen_loop' functions; although it stills does
2782 * a *little* too much for my taste.
2785 * 1 : argc = Number of parameters (including $0).
2786 * 2 : argv = Array of (char *)'s to the parameters.
2788 * Returns : 1 if : can't open config file, unrecognized directive,
2789 * stats requested in multi-thread mode, can't open the
2790 * log file, can't open the jar file, listen port is invalid,
2791 * any load fails, and can't bind port.
2793 * Else main never returns, the process must be signaled
2794 * to terminate execution. Or, on Windows, use the
2795 * "File", "Exit" menu option.
2797 *********************************************************************/
2799 int real_main(int argc, const char *argv[])
2801 int main(int argc, const char *argv[])
2805 unsigned int random_seed;
2807 struct passwd *pw = NULL;
2808 struct group *grp = NULL;
2817 #if !defined(_WIN32)
2825 * Parse the command line arguments
2827 * XXX: simply printing usage information in case of
2828 * invalid arguments isn't particular user friendly.
2830 while (++argc_pos < argc)
2833 /* Check to see if the service must be installed or uninstalled */
2834 if (strncmp(argv[argc_pos], "--install", 9) == 0)
2836 const char *pName = argv[argc_pos] + 9;
2839 exit( (install_service(pName)) ? 0 : 1 );
2841 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
2843 const char *pName = argv[argc_pos] + 11;
2846 exit((uninstall_service(pName)) ? 0 : 1);
2848 else if (strcmp(argv[argc_pos], "--service" ) == 0)
2850 bRunAsService = TRUE;
2851 w32_set_service_cwd();
2852 atexit(w32_service_exit_notify);
2855 #endif /* defined(_WIN32) */
2858 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2860 if (strcmp(argv[argc_pos], "--help") == 0)
2865 else if(strcmp(argv[argc_pos], "--version") == 0)
2867 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
2873 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
2878 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
2880 if (++argc_pos == argc) usage(argv[0]);
2881 pidfile = strdup(argv[argc_pos]);
2884 else if (strcmp(argv[argc_pos], "--user" ) == 0)
2886 if (++argc_pos == argc) usage(argv[argc_pos]);
2888 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
2891 if (NULL == (grp = getgrnam(p)))
2893 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
2897 if (NULL == (pw = getpwnam(argv[argc_pos])))
2899 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
2902 if (p != NULL) *--p = '\0';
2905 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
2909 #endif /* defined(unix) */
2911 else if (argc_pos + 1 != argc)
2914 * This is neither the last command line
2915 * option, nor was it recognized before,
2916 * therefore it must be invalid.
2922 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
2924 configfile = argv[argc_pos];
2927 } /* -END- while (more arguments) */
2930 if ( *configfile != '/' )
2932 char cwd[BUFFER_SIZE];
2934 size_t abs_file_size;
2936 /* make config-filename absolute here */
2937 if (NULL == getcwd(cwd, sizeof(cwd)))
2939 perror("failed to get current working directory");
2944 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
2945 basedir = strdup(cwd);
2947 if (NULL == basedir ||
2948 NULL == (abs_file = malloc(abs_file_size)))
2950 perror("malloc failed");
2953 strlcpy(abs_file, basedir, abs_file_size);
2954 strlcat(abs_file, "/", abs_file_size );
2955 strlcat(abs_file, configfile, abs_file_size);
2956 configfile = abs_file;
2958 #endif /* defined unix */
2962 clients->next = NULL;
2966 #elif defined(_WIN32)
2970 /* Prepare mutexes if supported and necessary. */
2971 initialize_mutexes();
2973 random_seed = (unsigned int)time(NULL);
2975 srandom(random_seed);
2978 #endif /* ifdef HAVE_RANDOM */
2981 * Unix signal handling
2983 * Catch the abort, interrupt and terminate signals for a graceful exit
2984 * Catch the hangup signal so the errlog can be reopened.
2985 * Ignore the broken pipe signals (FIXME: Why?)
2987 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
2990 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
2991 const int ignored_signals[] = { SIGPIPE, 0 };
2993 for (idx = 0; catched_signals[idx] != 0; idx++)
2995 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
2996 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
2998 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
2999 #endif /* ifdef sun */
3001 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3005 for (idx = 0; ignored_signals[idx] != 0; idx++)
3007 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3009 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3014 #else /* ifdef _WIN32 */
3015 # ifdef _WIN_CONSOLE
3017 * We *are* in a windows console app.
3018 * Print a verbose messages about FAQ's and such
3020 printf("%s", win32_blurb);
3021 # endif /* def _WIN_CONSOLE */
3022 #endif /* def _WIN32 */
3025 /* Initialize the CGI subsystem */
3026 cgi_init_error_messages();
3029 * If runnig on unix and without the --nodaemon
3030 * option, become a daemon. I.e. fork, detach
3031 * from tty and get process group leadership
3044 if ( pid < 0 ) /* error */
3049 else if ( pid != 0 ) /* parent */
3054 * must check for errors
3055 * child died due to missing files aso
3058 wpid = waitpid( pid, &status, WNOHANG );
3067 /* Should be more portable, but not as well tested */
3072 #else /* ndef __FreeBSD__ */
3074 #endif /* ndef __FreeBSD__ */
3075 fd = open("/dev/tty", O_RDONLY);
3078 /* no error check here */
3079 ioctl( fd, TIOCNOTTY,0 );
3083 /* FIXME: should close stderr (fd 2) here too, but the test
3085 * and load config file is done in listen_loop() and puts
3086 * some messages on stderr there.
3093 } /* -END- if (!no_daemon) */
3096 * As soon as we have written the PID file, we can switch
3097 * to the user and group ID indicated by the --user option
3103 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3105 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3111 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3113 if (chroot(pw->pw_dir) < 0)
3115 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3119 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3122 if (setuid(pw->pw_uid))
3124 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3128 char putenv_dummy[64];
3130 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3131 if (putenv(putenv_dummy) != 0)
3133 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3136 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3137 if (putenv(putenv_dummy) != 0)
3139 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3145 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3148 #endif /* defined unix */
3151 /* This will be FALSE unless the command line specified --service
3155 /* Yup, so now we must attempt to establish a connection
3156 * with the service dispatcher. This will only work if this
3157 * process was launched by the service control manager to
3158 * actually run as a service. If this isn't the case, i've
3159 * known it take around 30 seconds or so for the call to return.
3162 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3163 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3165 /* Service has run, and at this point is now being stopped, so just return */
3170 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3172 /* An error occurred. Usually it's because --service was wrongly specified
3173 * and we were unable to connect to the Service Control Dispatcher because
3174 * it wasn't expecting us and is therefore not listening.
3176 * For now, just continue below to call the listen_loop function.
3179 #endif /* def _WIN32 */
3189 /*********************************************************************
3191 * Function : bind_port_helper
3193 * Description : Bind the listen port. Handles logging, and aborts
3197 * 1 : config = Privoxy configuration. Specifies port
3200 * Returns : Port that was opened.
3202 *********************************************************************/
3203 static jb_socket bind_port_helper(struct configuration_spec * config)
3208 if ( (config->haddr != NULL)
3209 && (config->haddr[0] == '1')
3210 && (config->haddr[1] == '2')
3211 && (config->haddr[2] == '7')
3212 && (config->haddr[3] == '.') )
3214 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
3217 else if (config->haddr == NULL)
3219 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3224 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3225 config->hport, config->haddr);
3228 result = bind_port(config->haddr, config->hport, &bfd);
3235 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3236 "There may be another Privoxy or some other "
3237 "proxy running on port %d",
3238 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
3239 config->hport, config->hport);
3242 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3243 "The hostname is not resolvable",
3244 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3247 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
3248 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3251 /* shouldn't get here */
3252 return JB_INVALID_SOCKET;
3255 config->need_bind = 0;
3262 /* Without this simple workaround we get this compiler warning from _beginthread
3263 * warning C4028: formal parameter 1 different from declaration
3265 void w32_service_listen_loop(void *p)
3269 #endif /* def _WIN32 */
3272 /*********************************************************************
3274 * Function : listen_loop
3276 * Description : bind the listen port and enter a "FOREVER" listening loop.
3282 *********************************************************************/
3283 static void listen_loop(void)
3285 struct client_state *csp = NULL;
3287 struct configuration_spec * config;
3289 config = load_config();
3291 bfd = bind_port_helper(config);
3293 #ifdef FEATURE_GRACEFUL_TERMINATION
3294 while (!g_terminate)
3299 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
3300 while (waitpid(-1, NULL, WNOHANG) > 0)
3302 /* zombie children */
3304 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
3307 * Free data that was used by died threads
3313 * Re-open the errlog after HUP signal
3315 if (received_hup_signal)
3317 init_error_log(Argv[0], config->logfile, config->debug);
3318 received_hup_signal = 0;
3323 #ifdef FEATURE_COOKIE_JAR
3325 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
3326 * already open. I think unload_configfile() is not being run, which should do
3327 * this work. Until that can get resolved, we'll use this workaround.
3331 if (csp->config->jar)
3333 fclose(csp->config->jar);
3334 csp->config->jar = NULL;
3336 #endif /* FEATURE_COOKIE_JAR */
3337 #endif /* __OS2__ */
3339 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
3341 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
3345 csp->flags |= CSP_FLAG_ACTIVE;
3346 csp->sfd = JB_INVALID_SOCKET;
3348 csp->config = config = load_config();
3350 if ( config->need_bind )
3353 * Since we were listening to the "old port", we will not see
3354 * a "listen" param change until the next IJB request. So, at
3355 * least 1 more request must be made for us to find the new
3356 * setting. I am simply closing the old socket and binding the
3359 * Which-ever is correct, we will serve 1 more page via the
3360 * old settings. This should probably be a "show-proxy-args"
3361 * request. This should not be a so common of an operation
3362 * that this will hurt people's feelings.
3367 bfd = bind_port_helper(config);
3370 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
3372 if (!accept_connection(csp, bfd))
3374 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
3387 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
3390 #ifdef FEATURE_TOGGLE
3391 if (global_toggle_state)
3393 csp->flags |= CSP_FLAG_TOGGLED_ON;
3395 #endif /* def FEATURE_TOGGLE */
3397 if (run_loader(csp))
3399 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
3400 /* Never get here - LOG_LEVEL_FATAL causes program exit */
3404 if (block_acl(NULL,csp))
3406 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
3407 close_socket(csp->cfd);
3411 #endif /* def FEATURE_ACL */
3413 /* add it to the list of clients */
3414 csp->next = clients->next;
3415 clients->next = csp;
3417 if (config->multi_threaded)
3421 /* this is a switch () statment in the C preprocessor - ugh */
3422 #undef SELECTED_ONE_OPTION
3424 /* Use Pthreads in preference to native code */
3425 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
3426 #define SELECTED_ONE_OPTION
3428 pthread_t the_thread;
3429 pthread_attr_t attrs;
3431 pthread_attr_init(&attrs);
3432 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
3433 errno = pthread_create(&the_thread, &attrs,
3434 (void * (*)(void *))serve, csp);
3435 child_id = errno ? -1 : 0;
3436 pthread_attr_destroy(&attrs);
3440 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
3441 #define SELECTED_ONE_OPTION
3442 child_id = _beginthread(
3443 (void (*)(void *))serve,
3448 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
3449 #define SELECTED_ONE_OPTION
3450 child_id = _beginthread(
3451 (void(* _Optlink)(void*))serve,
3457 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
3458 #define SELECTED_ONE_OPTION
3460 thread_id tid = spawn_thread
3461 (server_thread, "server", B_NORMAL_PRIORITY, csp);
3463 if ((tid >= 0) && (resume_thread(tid) == B_OK))
3465 child_id = (int) tid;
3474 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
3475 #define SELECTED_ONE_OPTION
3476 csp->cfd = ReleaseSocket(csp->cfd, -1);
3479 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3480 NP_Output, Output(),
3481 NP_CloseOutput, FALSE,
3482 NP_Name, (ULONG)"privoxy child",
3486 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3487 NP_Output, Output(),
3488 NP_CloseOutput, FALSE,
3489 NP_Name, (ULONG)"privoxy child",
3490 NP_StackSize, 200*1024,
3496 ((struct Task *)child_id)->tc_UserData = csp;
3497 Signal((struct Task *)child_id, SIGF_SINGLE);
3502 #if !defined(SELECTED_ONE_OPTION)
3505 /* This block is only needed when using fork().
3506 * When using threads, the server thread was
3507 * created and run by the call to _beginthread().
3509 if (child_id == 0) /* child */
3512 #ifdef FEATURE_TOGGLE
3513 int inherited_toggle_state = global_toggle_state;
3514 #endif /* def FEATURE_TOGGLE */
3519 * If we've been toggled or we've blocked the request, tell Mom
3522 #ifdef FEATURE_TOGGLE
3523 if (inherited_toggle_state != global_toggle_state)
3525 rc |= RC_FLAG_TOGGLED;
3527 #endif /* def FEATURE_TOGGLE */
3529 #ifdef FEATURE_STATISTICS
3530 if (csp->flags & CSP_FLAG_REJECTED)
3532 rc |= RC_FLAG_BLOCKED;
3534 #endif /* ndef FEATURE_STATISTICS */
3538 else if (child_id > 0) /* parent */
3540 /* in a fork()'d environment, the parent's
3541 * copy of the client socket and the CSP
3545 #if !defined(_WIN32) && !defined(__CYGWIN__)
3547 wait( &child_status );
3550 * Evaluate child's return code: If the child has
3551 * - been toggled, toggle ourselves
3552 * - blocked its request, bump up the stats counter
3555 #ifdef FEATURE_TOGGLE
3556 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
3558 global_toggle_state = !global_toggle_state;
3560 #endif /* def FEATURE_TOGGLE */
3562 #ifdef FEATURE_STATISTICS
3564 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
3568 #endif /* def FEATURE_STATISTICS */
3570 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
3571 close_socket(csp->cfd);
3572 csp->flags &= ~CSP_FLAG_ACTIVE;
3576 #undef SELECTED_ONE_OPTION
3577 /* end of cpp switch () */
3579 if (child_id < 0) /* failed */
3581 char buf[BUFFER_SIZE];
3583 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
3585 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
3587 write_socket(csp->cfd, buf, strlen(buf));
3588 close_socket(csp->cfd);
3589 csp->flags &= ~CSP_FLAG_ACTIVE;
3600 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
3602 /* Clean up. Aim: free all memory (no leaks) */
3603 #ifdef FEATURE_GRACEFUL_TERMINATION
3605 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
3607 unload_current_config_file();
3608 unload_current_actions_file();
3609 unload_current_re_filterfile();
3610 #ifdef FEATURE_TRUST
3611 unload_current_trust_file();
3614 if (config->multi_threaded)
3621 } while ((clients->next != NULL) && (--i > 0));
3625 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
3636 #ifdef FEATURE_COOKIE_JAR
3637 if (NULL != config->jar)
3639 fclose(config->jar);
3643 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
3644 /* Cleanup - remove taskbar icon etc. */
3649 #endif /* FEATURE_GRACEFUL_TERMINATION */