1 const char jcc_rcs[] = "$Id: jcc.c,v 1.136 2007/06/01 16:41:11 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 1.136 2007/06/01 16:41:11 fabiankeil
37 * Add forward-override{} to change the forwarding settings through
38 * action sections. This is mainly interesting to forward different
39 * clients differently (for example based on User-Agent or request
42 * Revision 1.135 2007/05/24 17:03:50 fabiankeil
43 * - Let usage() mention the --chroot parameter.
44 * - Use read_socket() consistently and always leave
45 * the last buffer byte alone, even in cases where
46 * null termination (currently) doesn't matter.
48 * Revision 1.134 2007/05/16 14:59:46 fabiankeil
49 * - Fix config file loading on Unix if no config file is specified.
50 * Since r1.97 Privoxy would always interpret the last argument as
51 * config file, even if it's a valid command line option.
52 * - Abort in case of unrecognized command line options. Closes #1719696.
53 * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
54 * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
56 * Revision 1.133 2007/05/04 11:23:19 fabiankeil
57 * - Don't rerun crunchers that only depend on the request URL.
58 * - Don't count redirects and CGI requests as "blocked requests".
60 * Revision 1.132 2007/04/25 15:15:17 fabiankeil
61 * Support crunching based on tags created by server-header taggers.
63 * Revision 1.131 2007/04/22 13:24:50 fabiankeil
64 * Make HTTP snippets static (again). Add a Content-Type for those
65 * with content so the browser doesn't guess it based on the URL.
67 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
68 * Move crunching and request line rebuilding out of chat().
70 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
71 * Introduce tags as alternative way to specify which
72 * actions apply to a request. At the moment tags can be
73 * created based on client and server headers.
75 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
76 * Don't CLF-log CONNECT requests twice.
78 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
79 * Log the source address for ACL-related connection drops.
81 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
82 * New config option: enforce-blocks.
84 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
85 * - Move null byte check into separate function.
86 * - Don't confuse the client with error pages
87 * if a CONNECT request was already confirmed.
89 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
90 * Speed up NULL byte escaping and only log the complete
91 * NULL byte requests with header debugging enabled.
93 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
94 * Answer requests that contain NULL bytes with
95 * a custom response instead of waiting for more
96 * data until the client eventually hangs up.
98 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
99 * - Move delivery and logging of crunched responses
100 * from chat() into send_crunch_response().
101 * - Display the reason for generating http_responses.
102 * - Log the content length for LOG_LEVEL_CLF correctly
103 * (still incorrect for some fixed responses).
104 * - Reword an incorrect comment about
105 * treat-forbidden-connects-like-blocks violating
107 * - Add some log messages.
109 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
110 * Move mutex initialization into separate
111 * function and exit in case of errors.
113 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
114 * - Start to reduce chat()'s line count and move
115 * parts of it into separate functions.
116 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
118 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
119 * - Add Proxy-Agent header to HTTP snippets that are
120 * supposed to reach HTTP clients only.
121 * - Made a few CONNECT log messages more descriptive.
122 * - Catch completely empty server responses (as seen
123 * with Tor's fake ".noconnect" top level domain).
124 * - Use shiny new "forwarding-failed" template for socks errors.
126 * Revision 1.118 2007/01/07 07:43:43 joergs
127 * AmigaOS4 support added.
129 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
130 * Added config option accept-intercepted-requests
131 * and disabled it by default.
133 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
134 * Reverted parts of my last commit
135 * to keep error handling working.
137 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
138 * Fixed gcc43 conversion warnings.
140 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
141 * Fix -pedantic ISO C warning about converting
142 * from function pointer to object pointer.
144 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
145 * Silence compiler warning I introduced with my last commit.
147 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
148 * Mutex protect rand() if POSIX threading
149 * is used, warn the user if that's not possible
150 * and stop using it on _WIN32 where it could
153 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
154 * Don't prevent core dumps by catching SIGABRT.
155 * It's rude and makes debugging unreasonable painful.
157 * Revision 1.110 2006/12/13 14:52:53 etresoft
158 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
160 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
161 * Privoxy is now able to run as intercepting
162 * proxy in combination with any packet filter
163 * that does the port redirection. The destination
164 * is extracted from the "Host:" header which
165 * should be available for nearly all requests.
167 * Moved HTTP snipplets into jcc.c.
168 * Added error message for gopher proxy requests.
170 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
171 * Only unlink the pidfile if it's actually used.
173 * Change order of interception checks to make
174 * it possible to block or redirect requests for
177 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
178 * Make pthread mutex locking more generic. Instead of
179 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
180 * and use mutex locking unless there is an _r function
181 * available. Better safe than sorry.
183 * Fixes "./configure --disable-pthread" and should result
184 * in less threading-related problems on pthread-using platforms,
185 * but it still doesn't fix BR#1122404.
187 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
188 * Move pthread.h inclusion from jcc.c to jcc.h.
189 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
191 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
192 * Don't exit after receiving the second SIGHUP on Solaris.
194 * Fixes BR 1052235, but the same problem may exist on other
195 * systems. Once 3.0.6 is out we should use sigset()
196 * where available and see if it breaks anything.
198 * Revision 1.104 2006/09/23 13:26:38 roro
199 * Replace TABs by spaces in source code.
201 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
202 * Fix +redirect{}. Didn't work with -fast-redirects.
204 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
205 * Respond with 400 and a short text message
206 * if the client tries to use Privoxy as FTP proxy.
208 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
209 * Make number of retries in case of forwarded-connect problems
210 * a config file option (forwarded-connect-retries) and use 0 as
213 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
214 * Set random(3) seed.
216 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
217 * Follow the OpenBSD port's lead and protect the resolve
218 * functions on OpenBSD as well.
220 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
221 * --user fix. Only use the user as group if no group is specified.
222 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
224 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
225 * Windows service (re-)integration
229 * --install[:service_name]
230 * --uninstall[:service_name]
233 * They work as follows:
234 * --install will create a service for you and then terminate.
235 * By default the service name will be "privoxy" (without the quotes).
236 * However you can run multiple services if you wish, just by adding
237 * a colon and then a name (no spaces).
239 * --uninstall follows the exact same rules a --install.
241 * --service is used when the program is executed by the service
242 * control manager, and in normal circumstances would never be
243 * used as a command line argument.
245 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
246 * Windows service integration
248 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
249 * Incorporate Fabian Keil's patch work:
250 http://www.fabiankeil.de/sourcecode/privoxy/
252 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
253 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
254 * with what was really the latest development (the v_3_0_branch branch)
256 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
257 * Thanks to Jindrich Makovicka for a race condition fix for the log
258 * file. The race condition remains for non-pthread implementations.
259 * Reference patch #1175720.
261 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
262 * Add the ability to check jpeg images for invalid
263 * lengths of comment blocks. Defensive strategy
264 * against the exploit:
265 * Microsoft Security Bulletin MS04-028
266 * Buffer Overrun in JPEG Processing (GDI+) Could
267 * Allow Code Execution (833987)
268 * Enabled with +inspect-jpegs in actions files.
270 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
271 * - Fixed usage info for non-unix platforms
272 * - Fixed small cmdline parsing bug
274 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
275 * Diagnostics: Now preserve the returncode of pthread_create
276 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
278 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
279 * No longer ignore SIGCHLD. Fixes bug #769381
281 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
282 * Close jarfile on graceful exit, remove stray line
284 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
285 * Cosmetics: Killed a warning, a typo and an allocation left at exit
287 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
288 * No longer rely on non-POSIX.1 extensions of getcwd().
291 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
292 * Replaced setenv() by posix-compliant putenv()
293 * Thanks to Neil McCalden (nmcc AT users.sf.net).
295 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
296 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
298 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
299 * Clean-up and extension of improvements for forked mode:
300 * - Child's return code now consists of flags RC_FLAG_*
301 * - Reporting toggle to parent now properly #ifdef'ed
302 * - Children now report blocking to parent. This enables
303 * statistics in forked mode
305 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
306 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
307 * Children now report having been toggled through _exit(17), parents
308 * watch for that code and toggle themselves if found.
310 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
311 * Wrapping all *_r functions (the non-_r versions of them) with
312 * mutex semaphores for OSX. Hopefully this will take care of all
313 * of those pesky crash reports.
315 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
316 * Fixed two mostly harmless mem leaks
318 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
319 * Fix: Head of global clients list now initialized to NULL
321 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
322 * Added basic support for OPTIONS and TRACE HTTP methods:
323 * - New interceptor direct_response() added in chat().
324 * - sed() moved to earlier in the process, so that the
325 * Host: header is evaluated before actions and forwarding
328 * Revision 1.92 2002/05/08 16:00:46 oes
329 * Chat's buffer handling:
330 * - Fixed bug with unchecked out-of-mem conditions
331 * while reading client request & server headers
332 * - No longer predict if the buffer limit will be exceeded
333 * in the next read -- check add_to_iob's new
334 * return code. If buffer couldn't be extended
335 * (policy or out-of-mem) while
336 * - reading from client: abort
337 * - reading server headers: send error page
338 * - buffering server body for filter: flush,
339 * and if that fails: send error page
341 * Revision 1.91 2002/04/08 20:35:58 swa
344 * Revision 1.90 2002/04/02 14:57:28 oes
345 * Made sending wafers independent of FEATURE_COOKIE_JAR
347 * Revision 1.89 2002/03/31 17:18:59 jongfoster
348 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
350 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
351 * More compiler warning message maintenance
353 * Revision 1.87 2002/03/26 22:29:54 swa
354 * we have a new homepage!
356 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
357 * Workaround for closing the jarfile before load_config() comes around again
359 * Revision 1.85 2002/03/24 15:23:33 jongfoster
362 * Revision 1.84 2002/03/24 13:25:43 swa
363 * name change related issues
365 * Revision 1.83 2002/03/16 23:54:06 jongfoster
366 * Adding graceful termination feature, to help look for memory leaks.
367 * If you enable this (which, by design, has to be done by hand
368 * editing config.h) and then go to http://i.j.b/die, then the program
369 * will exit cleanly after the *next* request. It should free all the
370 * memory that was used.
372 * Revision 1.82 2002/03/13 00:27:05 jongfoster
375 * Revision 1.81 2002/03/12 01:42:50 oes
376 * Introduced modular filters
378 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
379 * OS/2 port maintenance:
380 * - Fixed EMX build - it had decayed a little
381 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
382 * substituted a memset for now.
384 * Revision 1.79 2002/03/09 20:03:52 jongfoster
385 * - Making various functions return int rather than size_t.
386 * (Undoing a recent change). Since size_t is unsigned on
387 * Windows, functions like read_socket that return -1 on
388 * error cannot return a size_t.
390 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
391 * crashes, and also frequently caused JB to jump to 100%
392 * CPU and stay there. (Because it thought it had just
393 * read ((unsigned)-1) == 4Gb of data...)
395 * - The signature of write_socket has changed, it now simply
396 * returns success=0/failure=nonzero.
398 * - Trying to get rid of a few warnings --with-debug on
399 * Windows, I've introduced a new type "jb_socket". This is
400 * used for the socket file descriptors. On Windows, this
401 * is SOCKET (a typedef for unsigned). Everywhere else, it's
402 * an int. The error value can't be -1 any more, so it's
403 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
404 * Windows it maps to the #define INVALID_SOCKET.)
406 * - The signature of bind_port has changed.
408 * Revision 1.78 2002/03/08 21:35:04 oes
409 * Added optional group supplement to --user option. Will now use default group of user if no group given
411 * Revision 1.77 2002/03/07 03:52:06 oes
412 * - Fixed compiler warnings etc
413 * - Improved handling of failed DNS lookups
415 * Revision 1.76 2002/03/06 22:54:35 jongfoster
416 * Automated function-comment nitpicking.
418 * Revision 1.75 2002/03/06 10:02:19 oes
419 * Fixed stupid bug when --user was not given
421 * Revision 1.74 2002/03/06 00:49:31 jongfoster
422 * Fixing warning on Windows
423 * Making #ifdefs that refer to the same variable consistently
424 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
426 * Revision 1.73 2002/03/05 23:57:30 hal9
427 * Stray character 's' on line 1618 was breaking build.
429 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
430 * - Re-enable OS/2 building after new parms were added
431 * - Fix false out of memory report when resolving CGI templates when no IP
432 * address is available of failed attempt (a la no such domain)
434 * Revision 1.71 2002/03/05 18:13:56 oes
435 * Added --user option
437 * Revision 1.70 2002/03/05 04:52:42 oes
438 * Deleted non-errlog debugging code
440 * Revision 1.69 2002/03/04 23:50:00 jongfoster
441 * Splitting off bind_port() call into bind_port_helper(), with
444 * Revision 1.68 2002/03/04 20:17:32 oes
447 * Revision 1.67 2002/03/04 18:18:57 oes
448 * - Removed _DEBUG mode
449 * - Cleand up cmdline parsing
450 * - Introduced --no-daemon, --pidfile options
451 * - Cleaned up signal handling:
452 * - Terminate cleanly on INT, TERM and ABRT
453 * - Schedule logfile for re-opening on HUP
454 * - Ignore CHLD and PIPE
455 * - Leave the rest with their default handlers
456 * - Uniform handler registration
457 * - Added usage() function
458 * - Played styleguide police
460 * Revision 1.66 2002/03/03 15:06:55 oes
461 * Re-enabled automatic config reloading
463 * Revision 1.65 2002/03/03 14:49:11 oes
464 * Fixed CLF logging: Now uses client's original HTTP request
466 * Revision 1.64 2002/03/03 09:18:03 joergs
467 * Made jumbjuster work on AmigaOS again.
469 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
470 * Clean up a little CRLF unpleasantness that suddenly appeared
472 * Revision 1.62 2002/02/20 23:17:23 jongfoster
473 * Detecting some out-of memory conditions and exiting with a log message.
475 * Revision 1.61 2002/01/17 21:01:52 jongfoster
476 * Moving all our URL and URL pattern parsing code to urlmatch.c.
478 * Revision 1.60 2001/12/30 14:07:32 steudten
479 * - Add signal handling (unix)
480 * - Add SIGHUP handler (unix)
481 * - Add creation of pidfile (unix)
482 * - Add action 'top' in rc file (RH)
483 * - Add entry 'SIGNALS' to manpage
484 * - Add exit message to logfile (unix)
486 * Revision 1.59 2001/12/13 14:07:18 oes
487 * Fixed Bug: 503 error page now sent OK
489 * Revision 1.58 2001/11/30 23:37:24 jongfoster
490 * Renaming the Win32 config file to config.txt - this is almost the
491 * same as the corresponding UNIX name "config"
493 * Revision 1.57 2001/11/16 00:47:43 jongfoster
494 * Changing the tty-disconnection code to use setsid().
496 * Revision 1.56 2001/11/13 20:20:54 jongfoster
497 * Tabs->spaces, fixing a bug with missing {} around an if()
499 * Revision 1.55 2001/11/13 20:14:53 jongfoster
500 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
502 * Revision 1.54 2001/11/07 00:03:14 steudten
503 * Give reliable return value if an error
504 * occurs not just 0 with new daemon mode.
506 * Revision 1.53 2001/11/05 21:41:43 steudten
507 * Add changes to be a real daemon just for unix os.
508 * (change cwd to /, detach from controlling tty, set
509 * process group and session leader to the own process.
511 * Add some fatal-error log message for failed malloc().
512 * Add '-d' if compiled with 'configure --with-debug' to
513 * enable debug output.
515 * Revision 1.52 2001/10/26 20:11:20 jongfoster
516 * Fixing type mismatch
518 * Revision 1.51 2001/10/26 17:38:28 oes
521 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
522 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
523 * threads to call select() simultaneously. So, it's time to do a real, live,
524 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
525 * (native). Both versions will work, but using __OS2__ offers multi-threading.
527 * Revision 1.49 2001/10/23 21:41:35 jongfoster
528 * Added call to initialize the (statically-allocated of course)
529 * "out of memory" CGI response.
531 * Revision 1.48 2001/10/10 19:56:46 jongfoster
532 * Moving some code that wasn't cookie-related out of an #ifdef
535 * Revision 1.47 2001/10/10 16:44:36 oes
536 * Added CONNECT destination port limitation check
538 * Revision 1.46 2001/10/08 15:17:41 oes
539 * Re-enabled SSL forwarding
541 * Revision 1.45 2001/10/07 15:42:11 oes
542 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
544 * Moved downgrading of the HTTP version from parse_http_request to
545 * chat(), since we can't decide if it is necessary before we have
546 * determined the actions for the URL. The HTTP command is now
547 * *always* re-built so the repairs need no longer be special-cased.
549 * filter_popups now gets a csp pointer so it can raise the new
550 * CSP_FLAG_MODIFIED flag.
554 * Added configurable size limit for the IOB. If the IOB grows so
555 * large that the next read would exceed the limit, the header
556 * is generated, and the header & unfiltered buffer are flushed
557 * to the client. Chat then continues in non-buffering,
558 * non-filtering body mode.
560 * Revision 1.44 2001/10/02 18:13:57 oes
563 * Revision 1.43 2001/10/02 15:32:13 oes
564 * Moved generation of hdr
566 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
567 * Cleaning up 2 compiler warnings on OS/2.
569 * Revision 1.41 2001/09/16 17:05:14 jongfoster
570 * Removing unused #include showarg.h
572 * Revision 1.40 2001/09/16 15:41:45 jongfoster
573 * Fixing signed/unsigned comparison warning.
575 * Revision 1.39 2001/09/16 13:21:27 jongfoster
576 * Changes to use new list functions.
578 * Revision 1.38 2001/09/16 13:01:46 jongfoster
579 * Removing redundant function call that zeroed zalloc()'d memory.
581 * Revision 1.37 2001/09/10 11:12:24 oes
582 * Deleted unused variable
584 * Revision 1.36 2001/09/10 10:56:15 oes
585 * Silenced compiler warnings
587 * Revision 1.35 2001/07/31 14:44:22 oes
588 * Deleted unused size parameter from filter_popups()
590 * Revision 1.34 2001/07/30 22:08:36 jongfoster
591 * Tidying up #defines:
592 * - All feature #defines are now of the form FEATURE_xxx
593 * - Permanently turned off WIN_GUI_EDIT
594 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
596 * Revision 1.33 2001/07/29 19:32:00 jongfoster
597 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
599 * Revision 1.32 2001/07/29 18:47:05 jongfoster
600 * Adding missing #include "loadcfg.h"
602 * Revision 1.31 2001/07/29 12:17:48 oes
603 * Applied pthread fix by Paul Lieverse
605 * Revision 1.30 2001/07/25 22:57:13 jongfoster
606 * __BEOS__ no longer overrides FEATURE_PTHREAD.
607 * This is because FEATURE_PTHREAD will soon be widely used, so I
608 * want to keep it simple.
610 * Revision 1.29 2001/07/24 12:47:06 oes
611 * Applied BeOS support update by Eugenia
613 * Revision 1.28 2001/07/23 13:26:12 oes
614 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
616 * Revision 1.27 2001/07/19 19:09:47 haroon
617 * - Added code to take care of the situation where while processing the first
618 * server response (which includes the server header), after finding the end
619 * of the headers we were not looking past the end of the headers for
620 * content modification. I enabled it for filter_popups.
621 * Someone else should look to see if other similar operations should be
622 * done to the discarded portion of the buffer.
624 * Note 2001/07/20: No, the other content modification mechanisms will process
625 * the whole iob later anyway. --oes
627 * Revision 1.26 2001/07/18 12:31:36 oes
630 * Revision 1.25 2001/07/15 19:43:49 jongfoster
631 * Supports POSIX threads.
632 * Also removed some unused #includes.
634 * Revision 1.24 2001/07/13 14:00:40 oes
635 * - Generic content modification scheme:
636 * Each feature has its own applicability flag that is set
637 * from csp->action->flags.
638 * Replaced the "filtering" int flag , by a function pointer
639 * "content_filter" to the function that will do the content
640 * modification. If it is != NULL, the document will be buffered
641 * and processed through *content_filter, which must set
642 * csp->content_length and return a modified copy of the body
643 * or return NULL (on failiure).
644 * - Changed csp->is_text to the more generic bitmap csp->content_type
645 * which can currently take the valued CT_TEXT or CT_GIF
647 * - Removed all #ifdef PCRS
649 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
650 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
651 * the `block_acl' call. This prevents a compilation error when the user
652 * does not wish to use the "ACL" feature.
654 * Revision 1.22 2001/06/29 21:45:41 oes
655 * Indentation, CRLF->LF, Tab-> Space
657 * Revision 1.21 2001/06/29 13:29:36 oes
658 * - Cleaned up, improved comments
659 * - Unified all possible interceptors (CGI,
660 * block, trust, fast_redirect) in one
661 * place, with one (CGI) answer generation
662 * mechansim. Much clearer now.
663 * - Removed the GIF image generation, which
664 * is now done in filters.c:block_url()
665 * - Made error conditions like domain lookup
666 * failiure or (various) problems while talking
667 * to the server use cgi.c:error_response()
668 * instead of generating HTML/HTTP in chat() (yuck!)
669 * - Removed logentry from cancelled commit
671 * Revision 1.20 2001/06/09 10:55:28 jongfoster
672 * Changing BUFSIZ ==> BUFFER_SIZE
674 * Revision 1.19 2001/06/07 23:12:52 jongfoster
675 * Replacing function pointer in struct gateway with a directly
676 * called function forwarded_connect().
677 * Replacing struct gateway with struct forward_spec
679 * Revision 1.18 2001/06/03 19:12:16 oes
680 * introduced new cgi handling
682 * Revision 1.17 2001/06/01 20:07:23 jongfoster
683 * Now uses action +image-blocker{} rather than config->tinygif
685 * Revision 1.16 2001/06/01 18:49:17 jongfoster
686 * Replaced "list_share" with "list" - the tiny memory gain was not
687 * worth the extra complexity.
689 * Revision 1.15 2001/05/31 21:24:47 jongfoster
690 * Changed "permission" to "action" throughout.
691 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
692 * Moved vanilla wafer check into chat(), since we must now
693 * decide whether or not to add it based on the URL.
695 * Revision 1.14 2001/05/29 20:14:01 joergs
696 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
699 * Revision 1.13 2001/05/29 09:50:24 jongfoster
700 * Unified blocklist/imagelist/permissionslist.
701 * File format is still under discussion, but the internal changes
704 * Also modified interceptor behaviour:
705 * - We now intercept all URLs beginning with one of the following
706 * prefixes (and *only* these prefixes):
708 * * http://ijbswa.sf.net/config/
709 * * http://ijbswa.sourceforge.net/config/
710 * - New interceptors "home page" - go to http://i.j.b/ to see it.
711 * - Internal changes so that intercepted and fast redirect pages
712 * are not replaced with an image.
713 * - Interceptors now have the option to send a binary page direct
714 * to the client. (i.e. ijb-send-banner uses this)
715 * - Implemented show-url-info interceptor. (Which is why I needed
716 * the above interceptors changes - a typical URL is
717 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
718 * The previous mechanism would not have intercepted that, and
719 * if it had been intercepted then it then it would have replaced
722 * Revision 1.12 2001/05/27 22:17:04 oes
724 * - re_process_buffer no longer writes the modified buffer
725 * to the client, which was very ugly. It now returns the
726 * buffer, which it is then written by chat.
728 * - content_length now adjusts the Content-Length: header
729 * for modified documents rather than crunch()ing it.
730 * (Length info in csp->content_length, which is 0 for
731 * unmodified documents)
733 * - For this to work, sed() is called twice when filtering.
735 * Revision 1.11 2001/05/26 17:27:53 jongfoster
736 * Added support for CLF and fixed LOG_LEVEL_LOG.
737 * Also did CRLF->LF fix of my previous patch.
739 * Revision 1.10 2001/05/26 15:26:15 jongfoster
740 * ACL feature now provides more security by immediately dropping
741 * connections from untrusted hosts.
743 * Revision 1.9 2001/05/26 00:28:36 jongfoster
744 * Automatic reloading of config file.
745 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
746 * Most of the global variables have been moved to a new
747 * struct configuration_spec, accessed through csp->config->globalname
748 * Most of the globals remaining are used by the Win32 GUI.
750 * Revision 1.8 2001/05/25 22:43:18 jongfoster
751 * Fixing minor memory leak and buffer overflow.
753 * Revision 1.7 2001/05/25 22:34:30 jongfoster
756 * Revision 1.6 2001/05/23 00:13:58 joergs
757 * AmigaOS support fixed.
759 * Revision 1.5 2001/05/22 18:46:04 oes
761 * - Enabled filtering banners by size rather than URL
762 * by adding patterns that replace all standard banner
763 * sizes with the "Junkbuster" gif to the re_filterfile
765 * - Enabled filtering WebBugs by providing a pattern
766 * which kills all 1x1 images
768 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
769 * which is selected by the (nonstandard and therefore
770 * capital) letter 'U' in the option string.
771 * It causes the quantifiers to be ungreedy by default.
772 * Appending a ? turns back to greedy (!).
774 * - Added a new interceptor ijb-send-banner, which
775 * sends back the "Junkbuster" gif. Without imagelist or
776 * MSIE detection support, or if tinygif = 1, or the
777 * URL isn't recognized as an imageurl, a lame HTML
778 * explanation is sent instead.
780 * - Added new feature, which permits blocking remote
781 * script redirects and firing back a local redirect
783 * The feature is conditionally compiled, i.e. it
784 * can be disabled with --disable-fast-redirects,
785 * plus it must be activated by a "fast-redirects"
786 * line in the config file, has its own log level
787 * and of course wants to be displayed by show-proxy-args
788 * Note: Boy, all the #ifdefs in 1001 locations and
789 * all the fumbling with configure.in and acconfig.h
790 * were *way* more work than the feature itself :-(
792 * - Because a generic redirect template was needed for
793 * this, tinygif = 3 now uses the same.
795 * - Moved GIFs, and other static HTTP response templates
800 * - Removed some >400 CRs again (Jon, you really worked
803 * Revision 1.4 2001/05/21 19:34:01 jongfoster
804 * Made failure to bind() a fatal error.
806 * Revision 1.3 2001/05/20 01:21:20 jongfoster
807 * Version 2.9.4 checkin.
808 * - Merged popupfile and cookiefile, and added control over PCRS
809 * filtering, in new "permissionsfile".
810 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
811 * file error you now get a message box (in the Win32 GUI) rather
812 * than the program exiting with no explanation.
813 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
815 * - Removed tabs from "config"
816 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
817 * - Bumped up version number.
819 * Revision 1.2 2001/05/17 22:34:44 oes
820 * - Added hint on GIF char array generation to jcc.c
821 * - Cleaned CRLF's from the sources and related files
822 * - Repaired logging for REF and FRC
824 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
825 * Initial import of version 2.9.3 source tree
828 *********************************************************************/
834 #include <sys/types.h>
843 # ifndef FEATURE_PTHREAD
847 # include <windows.h>
848 # include <process.h>
849 # endif /* ndef FEATURE_PTHREAD */
852 # ifndef _WIN_CONSOLE
854 # endif /* ndef _WIN_CONSOLE */
855 # include "w32svrapi.h"
857 #else /* ifndef _WIN32 */
859 # if !defined (__OS2__)
861 # include <sys/wait.h>
862 # endif /* ndef __OS2__ */
863 # include <sys/time.h>
864 # include <sys/stat.h>
865 # include <sys/ioctl.h>
868 #include <sys/termios.h>
879 # include <socket.h> /* BeOS has select() for sockets only. */
880 # include <OS.h> /* declarations for threads and stuff. */
883 # if defined(__EMX__) || defined(__OS2__)
884 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
889 #define bzero(B,N) memset(B,0x00,n)
904 #include "killpopup.h"
905 #include "miscutil.h"
907 #include "jbsockets.h"
912 #include "urlmatch.h"
914 const char jcc_h_rcs[] = JCC_H_VERSION;
915 const char project_h_rcs[] = PROJECT_H_VERSION;
918 struct client_state clients[1];
919 struct file_list files[1];
921 #ifdef FEATURE_STATISTICS
922 int urls_read = 0; /* total nr of urls read inc rejected */
923 int urls_rejected = 0; /* total nr of urls rejected */
924 #endif /* def FEATURE_STATISTICS */
926 #ifdef FEATURE_GRACEFUL_TERMINATION
930 static void listen_loop(void);
931 static void chat(struct client_state *csp);
933 void serve(struct client_state *csp);
934 #else /* ifndef AMIGA */
935 static void serve(struct client_state *csp);
936 #endif /* def AMIGA */
939 static int32 server_thread(void *data);
940 #endif /* def __BEOS__ */
943 #define sleep(N) Sleep(((N) * 1000))
947 #define sleep(N) DosSleep(((N) * 100))
950 #ifdef FEATURE_PTHREAD
951 pthread_mutex_t log_mutex;
952 pthread_mutex_t log_init_mutex;
954 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
955 pthread_mutex_t resolver_mutex;
956 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
958 #ifndef HAVE_GMTIME_R
959 pthread_mutex_t gmtime_mutex;
960 #endif /* ndef HAVE_GMTIME_R */
962 #ifndef HAVE_LOCALTIME_R
963 pthread_mutex_t localtime_mutex;
964 #endif /* ndef HAVE_GMTIME_R */
967 pthread_mutex_t rand_mutex;
968 #endif /* ndef HAVE_RANDOM */
970 #endif /* FEATURE_PTHREAD */
972 #if defined(unix) || defined(__EMX__)
973 const char *basedir = NULL;
974 const char *pidfile = NULL;
975 int received_hup_signal = 0;
976 #endif /* defined unix */
978 /* The vanilla wafer. */
979 static const char VANILLA_WAFER[] =
980 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
981 "Do_not_send_me_any_copyrighted_information_other_than_the_"
982 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
983 "In_particular_do_not_send_me_any_cookies_that_"
984 "are_subject_to_a_claim_of_copyright_by_anybody._"
985 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
986 "(copyright_or_otherwise)_applying_to_any_cookie._";
988 /* HTTP snipplets. */
989 const static char CSUCCEED[] =
990 "HTTP/1.0 200 Connection established\n"
991 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
993 const static char CHEADER[] =
994 "HTTP/1.0 400 Invalid header received from browser\r\n"
995 "Proxy-Agent: Privoxy " VERSION "\r\n"
996 "Content-Type: text/plain\r\n"
997 "Connection: close\r\n\r\n"
998 "Invalid header received from browser.\r\n";
1000 const static char CFORBIDDEN[] =
1001 "HTTP/1.0 403 Connection not allowable\r\n"
1002 "Proxy-Agent: Privoxy " VERSION "\r\n"
1003 "X-Hint: If you read this message interactively, then you know why this happens ,-)\r\n"
1004 "Connection: close\r\n\r\n";
1006 const static char FTP_RESPONSE[] =
1007 "HTTP/1.0 400 Invalid request received from browser\r\n"
1008 "Content-Type: text/plain\r\n"
1009 "Connection: close\r\n\r\n"
1010 "Invalid request. Privoxy doesn't support FTP.\r\n";
1012 const static char GOPHER_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 gopher.\r\n";
1018 /* XXX: should be a template */
1019 const static char MISSING_DESTINATION_RESPONSE[] =
1020 "HTTP/1.0 400 Bad request received from browser\r\n"
1021 "Proxy-Agent: Privoxy " VERSION "\r\n"
1022 "Content-Type: text/plain\r\n"
1023 "Connection: close\r\n\r\n"
1024 "Bad request. Privoxy was unable to extract the destination.\r\n";
1026 /* XXX: should be a template */
1027 const static char NO_SERVER_DATA_RESPONSE[] =
1028 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1029 "Proxy-Agent: Privoxy " VERSION "\r\n"
1030 "Content-Type: text/plain\r\n"
1031 "Connection: close\r\n\r\n"
1032 "Empty server or forwarder response.\r\n"
1033 "The connection was closed without sending any data.\r\n";
1035 /* XXX: should be a template */
1036 const static char NULL_BYTE_RESPONSE[] =
1037 "HTTP/1.0 400 Bad request received from browser\r\n"
1038 "Proxy-Agent: Privoxy " VERSION "\r\n"
1039 "Content-Type: text/plain\r\n"
1040 "Connection: close\r\n\r\n"
1041 "Bad request. Null byte(s) before end of request.\r\n";
1043 /* A function to crunch a response */
1044 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
1046 /* Crunch function flags */
1047 #define CF_NO_FLAGS 0
1048 /* Cruncher applies to forced requests as well */
1049 #define CF_IGNORE_FORCE 1
1050 /* Crunched requests are counted for the block statistics */
1051 #define CF_COUNT_AS_REJECT 2
1053 /* A crunch function and its flags */
1056 const crunch_func_ptr cruncher;
1060 /* Complete list of cruncher functions */
1061 const static struct cruncher crunchers_all[] = {
1062 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
1063 { block_url, CF_COUNT_AS_REJECT },
1064 #ifdef FEATURE_TRUST
1065 { trust_url, CF_COUNT_AS_REJECT },
1066 #endif /* def FEATURE_TRUST */
1067 { redirect_url, CF_NO_FLAGS },
1068 { dispatch_cgi, CF_IGNORE_FORCE},
1072 /* Light version, used after tags are applied */
1073 const static struct cruncher crunchers_light[] = {
1074 { block_url, CF_COUNT_AS_REJECT },
1075 { redirect_url, CF_NO_FLAGS },
1080 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1081 /*********************************************************************
1083 * Function : sig_handler
1085 * Description : Signal handler for different signals.
1086 * Exit gracefully on TERM and INT
1087 * or set a flag that will cause the errlog
1088 * to be reopened by the main thread on HUP.
1091 * 1 : the_signal = the signal cause this function to call
1095 *********************************************************************/
1096 static void sig_handler(int the_signal)
1102 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1113 received_hup_signal = 1;
1118 * We shouldn't be here, unless we catch signals
1119 * in main() that we can't handle here!
1121 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1129 /*********************************************************************
1131 * Function : client_protocol_is_unsupported
1133 * Description : Checks if the client used a known unsupported
1134 * protocol and deals with it by sending an error
1138 * 1 : csp = Current client state (buffers, headers, etc...)
1139 * 2 : req = the first request line send by the client
1141 * Returns : TRUE if an error response has been generated, or
1142 * FALSE if the request doesn't look invalid.
1144 *********************************************************************/
1145 int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1147 char buf[BUFFER_SIZE];
1150 * If it's a FTP or gopher request, we don't support it.
1152 * These checks are better than nothing, but they might
1153 * not work in all configurations and some clients might
1154 * have problems digesting the answer.
1156 * They should, however, never cause more problems than
1157 * Privoxy's old behaviour (returning the misleading HTML
1160 * "Could not resolve http://(ftp|gopher)://example.org").
1162 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1164 if (!strncmpic(req, "GET ftp://", 10))
1166 strlcpy(buf, FTP_RESPONSE, sizeof(buf));
1167 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as FTP proxy: %s",
1168 csp->ip_addr_str, req);
1172 strlcpy(buf, GOPHER_RESPONSE, sizeof(buf));
1173 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as gopher proxy: %s",
1174 csp->ip_addr_str, req);
1176 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1178 write_socket(csp->cfd, buf, strlen(buf));
1187 /*********************************************************************
1189 * Function : get_request_destination_elsewhere
1191 * Description : If the client's request was redirected into
1192 * Privoxy without the client's knowledge,
1193 * the request line lacks the destination host.
1195 * This function tries to get it elsewhere,
1196 * provided accept-intercepted-requests is enabled.
1198 * "Elsewhere" currently only means "Host: header",
1199 * but in the future we may ask the redirecting
1200 * packet filter to look the destination up.
1202 * If the destination stays unknown, an error
1203 * response is send to the client and headers
1204 * are freed so that chat() can return directly.
1207 * 1 : csp = Current client state (buffers, headers, etc...)
1208 * 2 : headers = a header list
1210 * Returns : JB_ERR_OK if the destination is now known, or
1211 * JB_ERR_PARSE if it isn't.
1213 *********************************************************************/
1214 jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1218 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1220 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1221 " Privoxy isn't configured to accept intercepted requests.",
1222 csp->ip_addr_str, csp->http->cmd);
1223 /* XXX: Use correct size */
1224 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1225 csp->ip_addr_str, csp->http->cmd);
1227 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1228 destroy_list(headers);
1230 return JB_ERR_PARSE;
1232 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1234 /* Split the domain we just got for pattern matching */
1235 init_domain_components(csp->http);
1241 /* We can't work without destination. Go spread the news.*/
1243 req = list_to_text(headers);
1245 /* XXX: Use correct size */
1246 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1247 csp->ip_addr_str, csp->http->cmd);
1248 log_error(LOG_LEVEL_ERROR,
1249 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1250 csp->ip_addr_str, csp->http->cmd, req);
1253 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
1254 destroy_list(headers);
1256 return JB_ERR_PARSE;
1259 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1260 * to get the destination IP address, use it as host directly
1261 * or do a reverse DNS lookup first.
1266 /*********************************************************************
1268 * Function : get_server_headers
1270 * Description : Parses server headers in iob and fills them
1271 * into csp->headers so that they can later be
1275 * 1 : csp = Current client state (buffers, headers, etc...)
1277 * Returns : JB_ERR_OK if everything went fine, or
1278 * JB_ERR_PARSE if the headers were incomplete.
1280 *********************************************************************/
1281 jb_err get_server_headers(struct client_state *csp)
1283 int continue_hack_in_da_house = 0;
1286 while (((header = get_header(csp)) != NULL) || continue_hack_in_da_house)
1291 * continue hack in da house. Ignore the ending of
1292 * this head and continue enlisting header lines.
1293 * The reason is described below.
1295 enlist(csp->headers, "");
1296 continue_hack_in_da_house = 0;
1299 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1302 * It's a bodyless continue response, don't
1303 * stop header parsing after reaching it's end.
1305 * As a result Privoxy will concatenate the
1306 * next response's head and parse and deliver
1307 * the headers as if they belonged to one request.
1309 * The client will separate them because of the
1310 * empty line between them.
1312 * XXX: What we're doing here is clearly against
1313 * the intended purpose of the continue header,
1314 * and under some conditions (HTTP/1.0 client request)
1315 * it's a standard violation.
1317 * Anyway, "sort of against the spec" is preferable
1318 * to "always getting confused by Continue responses"
1319 * (Privoxy's behaviour before this hack was added)
1321 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1322 continue_hack_in_da_house = 1;
1324 else if (*header == '\0')
1327 * If the header is empty, but the Continue hack
1328 * isn't active, we can assume that we reached the
1329 * end of the buffer before we hit the end of the
1332 * Inform the caller an let it decide how to handle it.
1334 return JB_ERR_PARSE;
1338 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1341 * XXX: Should we quit the request and return a
1342 * out of memory error page instead?
1344 log_error(LOG_LEVEL_ERROR,
1345 "Out of memory while enlisting server headers. %s lost.",
1355 /*********************************************************************
1357 * Function : crunch_reason
1359 * Description : Translates the crunch reason code into a string.
1362 * 1 : rsp = a http_response
1364 * Returns : A string with the crunch reason or an error description.
1366 *********************************************************************/
1367 const char *crunch_reason(const struct http_response *rsp)
1369 char * reason = NULL;
1371 assert(rsp != NULL);
1374 return "Internal error while searching for crunch reason";
1377 switch (rsp->reason)
1379 case RSP_REASON_UNSUPPORTED:
1380 reason = "Unsupported HTTP feature";
1382 case RSP_REASON_BLOCKED:
1385 case RSP_REASON_UNTRUSTED:
1386 reason = "Untrusted";
1388 case RSP_REASON_REDIRECTED:
1389 reason = "Redirected";
1391 case RSP_REASON_CGI_CALL:
1392 reason = "CGI Call";
1394 case RSP_REASON_NO_SUCH_DOMAIN:
1395 reason = "DNS failure";
1397 case RSP_REASON_FORWARDING_FAILED:
1398 reason = "Forwarding failed";
1400 case RSP_REASON_CONNECT_FAILED:
1401 reason = "Connection failure";
1403 case RSP_REASON_OUT_OF_MEMORY:
1404 reason = "Out of memory (may mask other reasons)";
1407 reason = "No reason recorded";
1415 /*********************************************************************
1417 * Function : send_crunch_response
1419 * Description : Delivers already prepared response for
1420 * intercepted requests, logs the interception
1421 * and frees the response.
1424 * 1 : csp = Current client state (buffers, headers, etc...)
1425 * 1 : rsp = Fully prepared response. Will be freed on exit.
1427 * Returns : Nothing.
1429 *********************************************************************/
1430 void send_crunch_response(struct client_state *csp, struct http_response *rsp)
1432 const struct http_request *http = csp->http;
1433 char status_code[4];
1435 assert(rsp != NULL);
1436 assert(rsp->head != NULL);
1441 * Not supposed to happen. If it does
1442 * anyway, treat it as an unknown error.
1444 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1445 /* return code doesn't matter */
1450 /* If rsp is still NULL, we have serious internal problems. */
1451 log_error(LOG_LEVEL_FATAL,
1452 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1456 * Extract the status code from the actual head
1457 * that was send to the client. It is the only
1458 * way to get it right for all requests, including
1459 * the fixed ones for out-of-memory problems.
1461 * A head starts like this: 'HTTP/1.1 200...'
1465 status_code[0] = rsp->head[9];
1466 status_code[1] = rsp->head[10];
1467 status_code[2] = rsp->head[11];
1468 status_code[3] = '\0';
1470 /* Write the answer to the client */
1471 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1472 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1474 /* There is nothing we can do about it. */
1475 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1478 /* Log that the request was crunched and why. */
1479 log_error(LOG_LEVEL_GPC, "%s%s crunch! (%s)",
1480 http->hostport, http->path, crunch_reason(rsp));
1481 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %d",
1482 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1484 /* Clean up and return */
1485 if (cgi_error_memory() != rsp)
1487 free_http_response(rsp);
1493 /*********************************************************************
1495 * Function : request_contains_null_bytes
1497 * Description : Checks for NULL bytes in the request and sends
1498 * an error message to the client if any were found.
1501 * 1 : csp = Current client state (buffers, headers, etc...)
1502 * 2 : buf = Data from the client's request to check.
1503 * 3 : len = The data length.
1505 * Returns : TRUE if the request contained one or more NULL bytes, or
1508 *********************************************************************/
1509 int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1511 size_t c_len; /* Request lenght when treated as C string */
1513 c_len = strlen(buf);
1518 * Null byte(s) found. Log the request,
1519 * return an error response and hang up.
1521 size_t tmp_len = c_len;
1526 * Replace NULL byte(s) with '°' characters
1527 * so the request can be logged as string.
1528 * XXX: Is there a better replacement character?
1531 tmp_len += strlen(buf+tmp_len);
1532 } while (tmp_len < len);
1534 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1535 "(length=%d, strlen=%d).", csp->ip_addr_str, len, c_len);
1536 log_error(LOG_LEVEL_HEADER,
1537 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1539 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
1541 /* XXX: Log correct size */
1542 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1551 /*********************************************************************
1553 * Function : crunch_response_triggered
1555 * Description : Checks if the request has to be crunched,
1556 * and delivers the crunch response if necessary.
1559 * 1 : csp = Current client state (buffers, headers, etc...)
1560 * 2 : crunchers = list of cruncher functions to run
1562 * Returns : TRUE if the request was answered with a crunch response
1565 *********************************************************************/
1566 int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
1568 struct http_response *rsp = NULL;
1569 const struct cruncher *c;
1571 for (c = crunchers; c->cruncher != NULL; c++)
1574 * Check the cruncher if either Privoxy is toggled
1575 * on and the request isn't forced, or if the cruncher
1576 * applies to forced requests as well.
1578 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
1579 !(csp->flags & CSP_FLAG_FORCED)) ||
1580 (c->flags & CF_IGNORE_FORCE))
1582 rsp = c->cruncher(csp);
1585 /* Deliver, log and free the interception response. */
1586 send_crunch_response(csp, rsp);
1587 #ifdef FEATURE_STATISTICS
1588 if (c->flags & CF_COUNT_AS_REJECT)
1590 csp->flags |= CSP_FLAG_REJECTED;
1592 #endif /* def FEATURE_STATISTICS */
1603 /*********************************************************************
1605 * Function : build_request_line
1607 * Description : Builds the HTTP request line.
1609 * If a HTTP forwarder is used it expects the whole URL,
1610 * web servers only get the path.
1613 * 1 : csp = Current client state (buffers, headers, etc...)
1614 * 2 : fwd = The forwarding spec used for the request
1615 * XXX: Should use http->fwd instead.
1616 * 3 : request_line = The old request line which will be replaced.
1618 * Returns : Nothing. Terminates in case of memory problems.
1620 *********************************************************************/
1621 void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
1623 struct http_request *http = csp->http;
1625 assert(http->ssl == 0);
1628 * Downgrade http version from 1.1 to 1.0
1629 * if +downgrade action applies.
1631 if ( (csp->action->flags & ACTION_DOWNGRADE)
1632 && (!strcmpic(http->ver, "HTTP/1.1")))
1635 http->ver = strdup("HTTP/1.0");
1637 if (http->ver == NULL)
1639 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1644 * Rebuild the request line.
1646 freez(*request_line);
1647 *request_line = strdup(http->gpc);
1648 string_append(request_line, " ");
1650 if (fwd->forward_host)
1652 string_append(request_line, http->url);
1656 string_append(request_line, http->path);
1658 string_append(request_line, " ");
1659 string_append(request_line, http->ver);
1661 if (*request_line == NULL)
1663 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1665 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
1669 /*********************************************************************
1673 * Description : Once a connection to the client has been accepted,
1674 * this function is called (via serve()) to handle the
1675 * main business of the communication. When this
1676 * function returns, the caller must close the client
1679 * FIXME: chat is nearly thousand lines long.
1683 * 1 : csp = Current client state (buffers, headers, etc...)
1685 * Returns : Nothing.
1687 *********************************************************************/
1688 static void chat(struct client_state *csp)
1690 char buf[BUFFER_SIZE];
1698 int ms_iis5_hack = 0;
1699 size_t byte_count = 0;
1700 int forwarded_connect_retries = 0;
1701 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
1702 const struct forward_spec * fwd;
1703 struct http_request *http;
1704 int len; /* for buffer sizes (and negative error codes) */
1705 #ifdef FEATURE_KILL_POPUPS
1706 int block_popups; /* bool, 1==will block popups */
1707 int block_popups_now = 0; /* bool, 1==currently blocking popups */
1708 #endif /* def FEATURE_KILL_POPUPS */
1710 int pcrs_filter; /* bool, 1==will filter through pcrs */
1711 int gif_deanimate; /* bool, 1==will deanimate gifs */
1712 int jpeg_inspect; /* bool, 1==will inspect jpegs */
1714 /* Function that does the content filtering for the current request */
1715 char *(*content_filter)() = NULL;
1717 /* Skeleton for HTTP response, if we should intercept the request */
1718 struct http_response *rsp;
1720 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1721 struct list header_list;
1722 struct list *headers = &header_list;
1726 memset(buf, 0, sizeof(buf));
1729 * Read the client's request. Note that since we're not using select() we
1730 * could get blocked here if a client connected, then didn't say anything!
1735 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1737 if (len <= 0) break; /* error! */
1739 if (request_contains_null_bytes(csp, buf, len))
1741 /* NULL bytes found and dealt with, just hang up. */
1746 * If there is no memory left for buffering the
1747 * request, there is nothing we can do but hang up
1749 if (add_to_iob(csp, buf, len))
1754 req = get_header(csp);
1758 break; /* no HTTP request! */
1763 continue; /* more to come! */
1766 /* Does the request line look invalid? */
1767 if (client_protocol_is_unsupported(csp, req))
1770 * Yes. The request has already been
1771 * answered with a error response, the buffers
1772 * were freed and we're done with chatting.
1777 #ifdef FEATURE_FORCE_LOAD
1779 * If this request contains the FORCE_PREFIX and blocks
1780 * aren't enforced, get rid of it and set the force flag.
1782 if (strstr(req, FORCE_PREFIX))
1784 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
1786 log_error(LOG_LEVEL_FORCE,
1787 "Ignored force prefix in request: \"%s\".", req);
1791 strclean(req, FORCE_PREFIX);
1792 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
1793 csp->flags |= CSP_FLAG_FORCED;
1797 #endif /* def FEATURE_FORCE_LOAD */
1799 switch( parse_http_request(req, http, csp) )
1802 log_error(LOG_LEVEL_ERROR, "Out of memory while parsing request.");
1805 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", req);
1813 if (http->cmd == NULL)
1815 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1816 /* XXX: Use correct size */
1817 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1818 log_error(LOG_LEVEL_ERROR, "Invalid header received from %s.", csp->ip_addr_str);
1820 free_http_request(http);
1824 /* grab the rest of the client's headers */
1828 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1830 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1833 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1838 * If there is no memory left for buffering the
1839 * request, there is nothing we can do but hang up
1841 if (add_to_iob(csp, buf, len))
1848 if (p == NULL) break;
1855 if (http->host == NULL)
1858 * If we still don't know the request destination,
1859 * the request is invalid or the client uses
1860 * Privoxy without its knowledge.
1862 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
1865 * Our attempts to get the request destination
1866 * elsewhere failed or Privoxy is configured
1867 * to only accept proxy requests.
1869 * An error response has already been send
1870 * and we're done here.
1877 * Determine the actions for this URL
1879 #ifdef FEATURE_TOGGLE
1880 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1882 /* Most compatible set of actions (i.e. none) */
1883 init_current_action(csp->action);
1886 #endif /* ndef FEATURE_TOGGLE */
1888 url_actions(http, csp);
1892 * Save a copy of the original request for logging
1894 http->ocmd = strdup(http->cmd);
1896 if (http->ocmd == NULL)
1898 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
1901 enlist(csp->headers, http->cmd);
1903 /* Append the previously read headers */
1904 list_append_list_unique(csp->headers, headers);
1905 destroy_list(headers);
1908 * If the user has not supplied any wafers, and the user has not
1909 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1911 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1912 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1914 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1917 if (JB_ERR_OK != sed(client_patterns, add_client_headers, csp))
1919 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers");
1921 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
1923 /* decide how to route the HTTP request */
1924 if (NULL == (fwd = forward_url(http, csp)))
1926 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1927 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1930 /* build the http request to send to the server
1931 * we have to do one of the following:
1933 * create = use the original HTTP request to create a new
1934 * HTTP request that has either the path component
1935 * without the http://domainspec (w/path) or the
1936 * full orininal URL (w/url)
1937 * Note that the path and/or the HTTP version may
1938 * have been altered by now.
1940 * connect = Open a socket to the host:port of the server
1941 * and short-circuit server and client socket.
1943 * pass = Pass the request unchanged if forwarding a CONNECT
1944 * request to a parent proxy. Note that we'll be sending
1945 * the CFAIL message ourselves if connecting to the parent
1946 * fails, but we won't send a CSUCCEED message if it works,
1947 * since that would result in a double message (ours and the
1948 * parent's). After sending the request to the parent, we simply
1951 * here's the matrix:
1954 * +--------+--------+
1956 * 0 | create | connect|
1958 * Forwarding +--------+--------+
1960 * 1 | create | pass |
1962 * +--------+--------+
1967 * Check if a CONNECT request is allowable:
1968 * In the absence of a +limit-connect action, allow only port 443.
1969 * If there is an action, allow whatever matches the specificaton.
1973 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
1974 || (csp->action->flags & ACTION_LIMIT_CONNECT
1975 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
1977 if (csp->action->flags & ACTION_TREAT_FORBIDDEN_CONNECTS_LIKE_BLOCKS)
1980 * The response may confuse some clients,
1981 * but makes unblocking easier.
1983 log_error(LOG_LEVEL_ERROR, "Marking suspicious CONNECT request from %s for blocking.",
1985 csp->action->flags |= ACTION_BLOCK;
1990 write_socket(csp->cfd, CFORBIDDEN, strlen(CFORBIDDEN));
1991 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
1992 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
1994 list_remove_all(csp->headers);
2003 freez(csp->headers->first->str);
2004 build_request_line(csp, fwd, &csp->headers->first->str);
2007 hdr = list_to_text(csp->headers);
2010 /* FIXME Should handle error properly */
2011 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2014 #ifdef FEATURE_KILL_POPUPS
2015 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
2016 #endif /* def FEATURE_KILL_POPUPS */
2018 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
2019 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
2021 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
2023 jpeg_inspect = ((csp->action->flags & ACTION_JPEG_INSPECT) != 0);
2026 * We have a request. Check if one of the crunchers wants it.
2028 if (crunch_response_triggered(csp, crunchers_all))
2031 * Yes. The client got the crunch response
2032 * and we are done here after cleaning up.
2035 list_remove_all(csp->headers);
2041 * The headers can't be removed earlier because
2042 * they were still needed for the referrer check
2043 * in case of CGI crunches.
2045 * XXX: Would it be worth to move the referrer check
2046 * into client_referrer() and set a flag if it's trusted?
2048 list_remove_all(csp->headers);
2050 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2052 if (fwd->forward_host)
2054 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2055 fwd->forward_host, fwd->forward_port, http->hostport);
2059 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2062 /* here we connect to the server, gateway, or the forwarder */
2064 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
2065 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2067 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
2068 forwarded_connect_retries, http->hostport);
2071 if (csp->sfd == JB_INVALID_SOCKET)
2073 if (fwd->type != SOCKS_NONE)
2076 rsp = error_response(csp, "forwarding-failed", errno);
2078 else if (errno == EINVAL)
2080 rsp = error_response(csp, "no-such-domain", errno);
2084 rsp = error_response(csp, "connect-failed", errno);
2085 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2090 /* Write the answer to the client */
2093 send_crunch_response(csp, rsp);
2100 if (fwd->forward_host || (http->ssl == 0))
2102 /* write the client's (modified) header to the server
2103 * (along with anything else that may be in the buffer)
2106 if (write_socket(csp->sfd, hdr, strlen(hdr))
2107 || (flush_socket(csp->sfd, csp) < 0))
2109 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
2112 rsp = error_response(csp, "connect-failed", errno);
2116 send_crunch_response(csp, rsp);
2126 * We're running an SSL tunnel and we're not forwarding,
2127 * so just send the "connect succeeded" message to the
2128 * client, flush the rest, and get out of the way.
2130 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
2138 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2140 /* we're finished with the client's header */
2143 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
2145 /* pass data between the client and server
2146 * until one or the other shuts down the connection.
2155 * FD_ZERO here seems to point to an errant macro which crashes.
2156 * So do this by hand for now...
2158 memset(&rfds,0x00,sizeof(fd_set));
2162 FD_SET(csp->cfd, &rfds);
2163 FD_SET(csp->sfd, &rfds);
2165 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
2169 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2173 /* this is the body of the browser's request
2174 * just read it and write it.
2177 if (FD_ISSET(csp->cfd, &rfds))
2179 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2183 break; /* "game over, man" */
2186 if (write_socket(csp->sfd, buf, (size_t)len))
2188 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2195 * The server wants to talk. It could be the header or the body.
2196 * If `hdr' is null, then it's the header otherwise it's the body.
2197 * FIXME: Does `hdr' really mean `host'? No.
2201 if (FD_ISSET(csp->sfd, &rfds))
2204 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2208 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2210 if (http->ssl && (fwd->forward_host == NULL))
2213 * Just hang up. We already confirmed the client's CONNECT
2214 * request with status code 200 and unencrypted content is
2215 * no longer welcome.
2217 log_error(LOG_LEVEL_ERROR,
2218 "CONNECT already confirmed. Unable to tell the client about the problem.");
2222 rsp = error_response(csp, "connect-failed", errno);
2226 send_crunch_response(csp, rsp);
2232 /* Add a trailing zero. This lets filter_popups
2233 * use string operations.
2237 #ifdef FEATURE_KILL_POPUPS
2238 /* Filter the popups on this read. */
2239 if (block_popups_now)
2241 filter_popups(buf, csp);
2243 #endif /* def FEATURE_KILL_POPUPS */
2245 /* Normally, this would indicate that we've read
2246 * as much as the server has sent us and we can
2247 * close the client connection. However, Microsoft
2248 * in its wisdom has released IIS/5 with a bug that
2249 * prevents it from sending the trailing \r\n in
2250 * a 302 redirect header (and possibly other headers).
2251 * To work around this if we've haven't parsed
2252 * a full header we'll append a trailing \r\n
2253 * and see if this now generates a valid one.
2255 * This hack shouldn't have any impacts. If we've
2256 * already transmitted the header or if this is a
2257 * SSL connection, then we won't bother with this
2258 * hack. So we only work on partially received
2259 * headers. If we append a \r\n and this still
2260 * doesn't generate a valid header, then we won't
2261 * transmit anything to the client.
2266 if (server_body || http->ssl)
2269 * If we have been buffering up the document,
2270 * now is the time to apply content modification
2271 * and send the result to the client.
2276 * If the content filter fails, use the original
2277 * buffer and length.
2278 * (see p != NULL ? p : csp->iob->cur below)
2280 if (NULL == (p = (*content_filter)(csp)))
2282 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2285 if (JB_ERR_OK != sed(server_patterns_light, NULL, csp))
2287 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
2290 hdr = list_to_text(csp->headers);
2293 /* FIXME Should handle error properly */
2294 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2298 * Shouldn't happen because this was the second sed run
2299 * and tags are only created for the first one.
2301 assert(!crunch_response_triggered(csp, crunchers_all));
2303 if (write_socket(csp->cfd, hdr, strlen(hdr))
2304 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
2306 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2316 break; /* "game over, man" */
2320 * This is NOT the body, so
2321 * Let's pretend the server just sent us a blank line.
2323 snprintf(buf, sizeof(buf), "\r\n");
2324 len = (int)strlen(buf);
2327 * Now, let the normal header parsing algorithm below do its
2328 * job. If it fails, we'll exit instead of continuing.
2335 * If this is an SSL connection or we're in the body
2336 * of the server document, just write it to the client,
2337 * unless we need to buffer the body for later content-filtering
2340 if (server_body || http->ssl)
2345 * If there is no memory left for buffering the content, or the buffer limit
2346 * has been reached, switch to non-filtering mode, i.e. make & write the
2347 * header, flush the iob and buf, and get out of the way.
2349 if (add_to_iob(csp, buf, len))
2354 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
2355 if (JB_ERR_OK != sed(server_patterns, add_server_headers, csp))
2357 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
2359 hdr = list_to_text(csp->headers);
2363 * Memory is too tight to even generate the header.
2364 * Send our static "Out-of-memory" page.
2366 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2367 rsp = cgi_error_memory();
2368 send_crunch_response(csp, rsp);
2373 if (crunch_response_triggered(csp, crunchers_light))
2376 * One of the tags created by a server-header
2377 * tagger triggered a crunch. We already
2378 * delivered the crunch response to the client
2379 * and are done here after cleaning up.
2385 hdrlen = strlen(hdr);
2387 if (write_socket(csp->cfd, hdr, hdrlen)
2388 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
2389 || (write_socket(csp->cfd, buf, (size_t)len)))
2391 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
2397 byte_count += hdrlen + (size_t)flushed + (size_t)len;
2399 content_filter = NULL;
2406 if (write_socket(csp->cfd, buf, (size_t)len))
2408 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2412 byte_count += (size_t)len;
2417 /* we're still looking for the end of the
2418 * server's header ... (does that make header
2419 * parsing an "out of body experience" ?
2423 * buffer up the data we just read. If that fails,
2424 * there's little we can do but send our static
2425 * out-of-memory page.
2427 if (add_to_iob(csp, buf, len))
2429 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2430 rsp = cgi_error_memory();
2431 send_crunch_response(csp, rsp);
2436 /* Convert iob into something sed() can digest */
2437 if (JB_ERR_PARSE == get_server_headers(csp))
2441 /* Well, we tried our MS IIS/5
2442 * hack and it didn't work.
2443 * The header is incomplete
2444 * and there isn't anything
2445 * we can do about it.
2451 /* Since we have to wait for
2452 * more from the server before
2453 * we can parse the headers
2454 * we just continue here.
2460 /* Did we actually get anything? */
2461 if (NULL == csp->headers->first)
2463 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
2464 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2465 write_socket(csp->cfd, NO_SERVER_DATA_RESPONSE, strlen(NO_SERVER_DATA_RESPONSE));
2466 free_http_request(http);
2470 /* we have now received the entire header.
2471 * filter it and send the result to the client
2473 if (JB_ERR_OK != sed(server_patterns, add_server_headers, csp))
2475 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
2477 hdr = list_to_text(csp->headers);
2480 /* FIXME Should handle error properly */
2481 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2484 if (crunch_response_triggered(csp, crunchers_light))
2487 * One of the tags created by a server-header
2488 * tagger triggered a crunch. We already
2489 * delivered the crunch response to the client
2490 * and are done here after cleaning up.
2495 #ifdef FEATURE_KILL_POPUPS
2496 /* Start blocking popups if appropriate. */
2498 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
2499 !http->ssl && /* We talk plaintext */
2500 block_popups) /* Policy allows */
2502 block_popups_now = 1;
2504 * Filter the part of the body that came in the same read
2505 * as the last headers:
2507 filter_popups(csp->iob->cur, csp);
2510 #endif /* def FEATURE_KILL_POPUPS */
2512 /* Buffer and pcrs filter this if appropriate. */
2514 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
2515 !http->ssl && /* We talk plaintext */
2516 pcrs_filter) /* Policy allows */
2518 content_filter = pcrs_filter_response;
2521 /* Buffer and gif_deanimate this if appropriate. */
2523 if ((csp->content_type & CT_GIF) && /* It's an image/gif MIME-Type */
2524 !http->ssl && /* We talk plaintext */
2525 gif_deanimate) /* Policy allows */
2527 content_filter = gif_deanimate_response;
2530 /* Buffer and jpg_inspect this if appropriate. */
2532 if ((csp->content_type & CT_JPEG) && /* It's an image/jpeg MIME-Type */
2533 !http->ssl && /* We talk plaintext */
2534 jpeg_inspect) /* Policy allows */
2536 content_filter = jpeg_inspect_response;
2540 * Only write if we're not buffering for content modification
2542 if (!content_filter)
2544 /* write the server's (modified) header to
2545 * the client (along with anything else that
2546 * may be in the buffer)
2549 if (write_socket(csp->cfd, hdr, strlen(hdr))
2550 || ((len = flush_socket(csp->cfd, csp)) < 0))
2552 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
2554 /* the write failed, so don't bother
2555 * mentioning it to the client...
2556 * it probably can't hear us anyway.
2562 byte_count += (size_t)len;
2565 /* we're finished with the server's header */
2570 /* If this was a MS IIS/5 hack then it means
2571 * the server has already closed the
2572 * connection. Nothing more to read. Time
2583 return; /* huh? we should never get here */
2586 if (csp->content_length == 0)
2589 * If Privoxy didn't recalculate the
2590 * Content-Lenght, byte_count is still
2593 csp->content_length = byte_count;
2596 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
2597 csp->ip_addr_str, http->ocmd, csp->content_length);
2601 /*********************************************************************
2605 * Description : This is little more than chat. We only "serve" to
2606 * to close any socket that chat may have opened.
2609 * 1 : csp = Current client state (buffers, headers, etc...)
2613 *********************************************************************/
2615 void serve(struct client_state *csp)
2616 #else /* ifndef AMIGA */
2617 static void serve(struct client_state *csp)
2618 #endif /* def AMIGA */
2621 close_socket(csp->cfd);
2623 if (csp->sfd != JB_INVALID_SOCKET)
2625 close_socket(csp->sfd);
2628 csp->flags &= ~CSP_FLAG_ACTIVE;
2634 /*********************************************************************
2636 * Function : server_thread
2638 * Description : We only exist to call `serve' in a threaded environment.
2641 * 1 : data = Current client state (buffers, headers, etc...)
2643 * Returns : Always 0.
2645 *********************************************************************/
2646 static int32 server_thread(void *data)
2648 serve((struct client_state *) data);
2655 /*********************************************************************
2659 * Description : Print usage info & exit.
2661 * Parameters : Pointer to argv[0] for identifying ourselves
2665 *********************************************************************/
2666 void usage(const char *myname)
2668 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
2672 #endif /* defined(unix) */
2675 "[--no-daemon] [--pidfile pidfile] [--user user[.group]] "
2676 #endif /* defined(unix) */
2677 "[--version] [configfile]\n"
2678 "Aborting\n", myname);
2685 /*********************************************************************
2687 * Function : initialize_mutexes
2689 * Description : Prepares mutexes if mutex support is available.
2693 * Returns : Void, exits in case of errors.
2695 *********************************************************************/
2696 void initialize_mutexes()
2700 #ifdef FEATURE_PTHREAD
2702 * Prepare global mutex semaphores
2704 err = pthread_mutex_init(&log_mutex, 0);
2706 if (!err) err = pthread_mutex_init(&log_init_mutex, 0);
2709 * XXX: The assumptions below are a bit naive
2710 * and can cause locks that aren't necessary.
2712 * For example older FreeBSD versions (< 6.x?)
2713 * have no gethostbyname_r, but gethostbyname is
2716 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
2717 if (!err) err = pthread_mutex_init(&resolver_mutex, 0);
2718 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
2720 * XXX: should we use a single mutex for
2721 * localtime() and gmtime() as well?
2723 #ifndef HAVE_GMTIME_R
2724 if (!err) err = pthread_mutex_init(&gmtime_mutex, 0);
2725 #endif /* ndef HAVE_GMTIME_R */
2727 #ifndef HAVE_LOCALTIME_R
2728 if (!err) err = pthread_mutex_init(&localtime_mutex, 0);
2729 #endif /* ndef HAVE_GMTIME_R */
2732 if (!err) err = pthread_mutex_init(&rand_mutex, 0);
2733 #endif /* ndef HAVE_RANDOM */
2734 #endif /* FEATURE_PTHREAD */
2737 * TODO: mutex support for mingw32 would be swell.
2742 printf("Fatal error. Mutex initialization failed: %s.\n",
2751 /*********************************************************************
2755 * Description : Load the config file and start the listen loop.
2756 * This function is a lot more *sane* with the `load_config'
2757 * and `listen_loop' functions; although it stills does
2758 * a *little* too much for my taste.
2761 * 1 : argc = Number of parameters (including $0).
2762 * 2 : argv = Array of (char *)'s to the parameters.
2764 * Returns : 1 if : can't open config file, unrecognized directive,
2765 * stats requested in multi-thread mode, can't open the
2766 * log file, can't open the jar file, listen port is invalid,
2767 * any load fails, and can't bind port.
2769 * Else main never returns, the process must be signaled
2770 * to terminate execution. Or, on Windows, use the
2771 * "File", "Exit" menu option.
2773 *********************************************************************/
2775 int real_main(int argc, const char *argv[])
2777 int main(int argc, const char *argv[])
2781 unsigned int random_seed;
2783 struct passwd *pw = NULL;
2784 struct group *grp = NULL;
2793 #if !defined(_WIN32)
2801 * Parse the command line arguments
2803 * XXX: simply printing usage information in case of
2804 * invalid arguments isn't particular user friendly.
2806 while (++argc_pos < argc)
2809 /* Check to see if the service must be installed or uninstalled */
2810 if (strncmp(argv[argc_pos], "--install", 9) == 0)
2812 const char *pName = argv[argc_pos] + 9;
2815 exit( (install_service(pName)) ? 0 : 1 );
2817 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
2819 const char *pName = argv[argc_pos] + 11;
2822 exit((uninstall_service(pName)) ? 0 : 1);
2824 else if (strcmp(argv[argc_pos], "--service" ) == 0)
2826 bRunAsService = TRUE;
2827 w32_set_service_cwd();
2828 atexit(w32_service_exit_notify);
2831 #endif /* defined(_WIN32) */
2834 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2836 if (strcmp(argv[argc_pos], "--help") == 0)
2841 else if(strcmp(argv[argc_pos], "--version") == 0)
2843 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
2849 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
2854 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
2856 if (++argc_pos == argc) usage(argv[0]);
2857 pidfile = strdup(argv[argc_pos]);
2860 else if (strcmp(argv[argc_pos], "--user" ) == 0)
2862 if (++argc_pos == argc) usage(argv[argc_pos]);
2864 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
2867 if (NULL == (grp = getgrnam(p)))
2869 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
2873 if (NULL == (pw = getpwnam(argv[argc_pos])))
2875 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
2878 if (p != NULL) *--p = '\0';
2881 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
2885 #endif /* defined(unix) */
2887 else if (argc_pos + 1 != argc)
2890 * This is neither the last command line
2891 * option, nor was it recognized before,
2892 * therefore it must be invalid.
2898 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
2900 configfile = argv[argc_pos];
2903 } /* -END- while (more arguments) */
2906 if ( *configfile != '/' )
2908 char cwd[BUFFER_SIZE];
2910 size_t abs_file_size;
2912 /* make config-filename absolute here */
2913 if (NULL == getcwd(cwd, sizeof(cwd)))
2915 perror("failed to get current working directory");
2920 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
2921 basedir = strdup(cwd);
2923 if (NULL == basedir ||
2924 NULL == (abs_file = malloc(abs_file_size)))
2926 perror("malloc failed");
2929 strlcpy(abs_file, basedir, abs_file_size);
2930 strlcat(abs_file, "/", abs_file_size );
2931 strlcat(abs_file, configfile, abs_file_size);
2932 configfile = abs_file;
2934 #endif /* defined unix */
2938 clients->next = NULL;
2942 #elif defined(_WIN32)
2946 /* Prepare mutexes if supported and necessary. */
2947 initialize_mutexes();
2949 random_seed = (unsigned int)time(NULL);
2951 srandom(random_seed);
2954 #endif /* ifdef HAVE_RANDOM */
2957 * Unix signal handling
2959 * Catch the abort, interrupt and terminate signals for a graceful exit
2960 * Catch the hangup signal so the errlog can be reopened.
2961 * Ignore the broken pipe signals (FIXME: Why?)
2963 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
2966 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
2967 const int ignored_signals[] = { SIGPIPE, 0 };
2969 for (idx = 0; catched_signals[idx] != 0; idx++)
2971 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
2972 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
2974 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
2975 #endif /* ifdef sun */
2977 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
2981 for (idx = 0; ignored_signals[idx] != 0; idx++)
2983 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
2985 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
2990 #else /* ifdef _WIN32 */
2991 # ifdef _WIN_CONSOLE
2993 * We *are* in a windows console app.
2994 * Print a verbose messages about FAQ's and such
2996 printf("%s", win32_blurb);
2997 # endif /* def _WIN_CONSOLE */
2998 #endif /* def _WIN32 */
3001 /* Initialize the CGI subsystem */
3002 cgi_init_error_messages();
3005 * If runnig on unix and without the --nodaemon
3006 * option, become a daemon. I.e. fork, detach
3007 * from tty and get process group leadership
3020 if ( pid < 0 ) /* error */
3025 else if ( pid != 0 ) /* parent */
3030 * must check for errors
3031 * child died due to missing files aso
3034 wpid = waitpid( pid, &status, WNOHANG );
3043 /* Should be more portable, but not as well tested */
3048 #else /* ndef __FreeBSD__ */
3050 #endif /* ndef __FreeBSD__ */
3051 fd = open("/dev/tty", O_RDONLY);
3054 /* no error check here */
3055 ioctl( fd, TIOCNOTTY,0 );
3059 /* FIXME: should close stderr (fd 2) here too, but the test
3061 * and load config file is done in listen_loop() and puts
3062 * some messages on stderr there.
3069 } /* -END- if (!no_daemon) */
3072 * As soon as we have written the PID file, we can switch
3073 * to the user and group ID indicated by the --user option
3079 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3081 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3087 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3089 if (chroot(pw->pw_dir) < 0)
3091 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3095 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3098 if (setuid(pw->pw_uid))
3100 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3104 char putenv_dummy[64];
3106 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3107 if (putenv(putenv_dummy) != 0)
3109 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3112 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3113 if (putenv(putenv_dummy) != 0)
3115 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3121 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3124 #endif /* defined unix */
3127 /* This will be FALSE unless the command line specified --service
3131 /* Yup, so now we must attempt to establish a connection
3132 * with the service dispatcher. This will only work if this
3133 * process was launched by the service control manager to
3134 * actually run as a service. If this isn't the case, i've
3135 * known it take around 30 seconds or so for the call to return.
3138 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3139 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3141 /* Service has run, and at this point is now being stopped, so just return */
3146 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3148 /* An error occurred. Usually it's because --service was wrongly specified
3149 * and we were unable to connect to the Service Control Dispatcher because
3150 * it wasn't expecting us and is therefore not listening.
3152 * For now, just continue below to call the listen_loop function.
3155 #endif /* def _WIN32 */
3165 /*********************************************************************
3167 * Function : bind_port_helper
3169 * Description : Bind the listen port. Handles logging, and aborts
3173 * 1 : config = Privoxy configuration. Specifies port
3176 * Returns : Port that was opened.
3178 *********************************************************************/
3179 static jb_socket bind_port_helper(struct configuration_spec * config)
3184 if ( (config->haddr != NULL)
3185 && (config->haddr[0] == '1')
3186 && (config->haddr[1] == '2')
3187 && (config->haddr[2] == '7')
3188 && (config->haddr[3] == '.') )
3190 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
3193 else if (config->haddr == NULL)
3195 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3200 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3201 config->hport, config->haddr);
3204 result = bind_port(config->haddr, config->hport, &bfd);
3211 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3212 "There may be another Privoxy or some other "
3213 "proxy running on port %d",
3214 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
3215 config->hport, config->hport);
3218 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3219 "The hostname is not resolvable",
3220 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3223 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
3224 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3227 /* shouldn't get here */
3228 return JB_INVALID_SOCKET;
3231 config->need_bind = 0;
3238 /* Without this simple workaround we get this compiler warning from _beginthread
3239 * warning C4028: formal parameter 1 different from declaration
3241 void w32_service_listen_loop(void *p)
3245 #endif /* def _WIN32 */
3248 /*********************************************************************
3250 * Function : listen_loop
3252 * Description : bind the listen port and enter a "FOREVER" listening loop.
3258 *********************************************************************/
3259 static void listen_loop(void)
3261 struct client_state *csp = NULL;
3263 struct configuration_spec * config;
3265 config = load_config();
3267 bfd = bind_port_helper(config);
3269 #ifdef FEATURE_GRACEFUL_TERMINATION
3270 while (!g_terminate)
3275 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
3276 while (waitpid(-1, NULL, WNOHANG) > 0)
3278 /* zombie children */
3280 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
3283 * Free data that was used by died threads
3289 * Re-open the errlog after HUP signal
3291 if (received_hup_signal)
3293 init_error_log(Argv[0], config->logfile, config->debug);
3294 received_hup_signal = 0;
3299 #ifdef FEATURE_COOKIE_JAR
3301 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
3302 * already open. I think unload_configfile() is not being run, which should do
3303 * this work. Until that can get resolved, we'll use this workaround.
3307 if (csp->config->jar)
3309 fclose(csp->config->jar);
3310 csp->config->jar = NULL;
3312 #endif /* FEATURE_COOKIE_JAR */
3313 #endif /* __OS2__ */
3315 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
3317 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
3321 csp->flags |= CSP_FLAG_ACTIVE;
3322 csp->sfd = JB_INVALID_SOCKET;
3324 csp->config = config = load_config();
3326 if ( config->need_bind )
3329 * Since we were listening to the "old port", we will not see
3330 * a "listen" param change until the next IJB request. So, at
3331 * least 1 more request must be made for us to find the new
3332 * setting. I am simply closing the old socket and binding the
3335 * Which-ever is correct, we will serve 1 more page via the
3336 * old settings. This should probably be a "show-proxy-args"
3337 * request. This should not be a so common of an operation
3338 * that this will hurt people's feelings.
3343 bfd = bind_port_helper(config);
3346 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
3348 if (!accept_connection(csp, bfd))
3350 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
3363 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
3366 #ifdef FEATURE_TOGGLE
3367 if (global_toggle_state)
3369 csp->flags |= CSP_FLAG_TOGGLED_ON;
3371 #endif /* def FEATURE_TOGGLE */
3373 if (run_loader(csp))
3375 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
3376 /* Never get here - LOG_LEVEL_FATAL causes program exit */
3380 if (block_acl(NULL,csp))
3382 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
3383 close_socket(csp->cfd);
3387 #endif /* def FEATURE_ACL */
3389 /* add it to the list of clients */
3390 csp->next = clients->next;
3391 clients->next = csp;
3393 if (config->multi_threaded)
3397 /* this is a switch () statment in the C preprocessor - ugh */
3398 #undef SELECTED_ONE_OPTION
3400 /* Use Pthreads in preference to native code */
3401 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
3402 #define SELECTED_ONE_OPTION
3404 pthread_t the_thread;
3405 pthread_attr_t attrs;
3407 pthread_attr_init(&attrs);
3408 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
3409 errno = pthread_create(&the_thread, &attrs,
3410 (void * (*)(void *))serve, csp);
3411 child_id = errno ? -1 : 0;
3412 pthread_attr_destroy(&attrs);
3416 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
3417 #define SELECTED_ONE_OPTION
3418 child_id = _beginthread(
3419 (void (*)(void *))serve,
3424 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
3425 #define SELECTED_ONE_OPTION
3426 child_id = _beginthread(
3427 (void(* _Optlink)(void*))serve,
3433 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
3434 #define SELECTED_ONE_OPTION
3436 thread_id tid = spawn_thread
3437 (server_thread, "server", B_NORMAL_PRIORITY, csp);
3439 if ((tid >= 0) && (resume_thread(tid) == B_OK))
3441 child_id = (int) tid;
3450 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
3451 #define SELECTED_ONE_OPTION
3452 csp->cfd = ReleaseSocket(csp->cfd, -1);
3455 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3456 NP_Output, Output(),
3457 NP_CloseOutput, FALSE,
3458 NP_Name, (ULONG)"privoxy child",
3462 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3463 NP_Output, Output(),
3464 NP_CloseOutput, FALSE,
3465 NP_Name, (ULONG)"privoxy child",
3466 NP_StackSize, 200*1024,
3472 ((struct Task *)child_id)->tc_UserData = csp;
3473 Signal((struct Task *)child_id, SIGF_SINGLE);
3478 #if !defined(SELECTED_ONE_OPTION)
3481 /* This block is only needed when using fork().
3482 * When using threads, the server thread was
3483 * created and run by the call to _beginthread().
3485 if (child_id == 0) /* child */
3488 #ifdef FEATURE_TOGGLE
3489 int inherited_toggle_state = global_toggle_state;
3490 #endif /* def FEATURE_TOGGLE */
3495 * If we've been toggled or we've blocked the request, tell Mom
3498 #ifdef FEATURE_TOGGLE
3499 if (inherited_toggle_state != global_toggle_state)
3501 rc |= RC_FLAG_TOGGLED;
3503 #endif /* def FEATURE_TOGGLE */
3505 #ifdef FEATURE_STATISTICS
3506 if (csp->flags & CSP_FLAG_REJECTED)
3508 rc |= RC_FLAG_BLOCKED;
3510 #endif /* ndef FEATURE_STATISTICS */
3514 else if (child_id > 0) /* parent */
3516 /* in a fork()'d environment, the parent's
3517 * copy of the client socket and the CSP
3521 #if !defined(_WIN32) && !defined(__CYGWIN__)
3523 wait( &child_status );
3526 * Evaluate child's return code: If the child has
3527 * - been toggled, toggle ourselves
3528 * - blocked its request, bump up the stats counter
3531 #ifdef FEATURE_TOGGLE
3532 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
3534 global_toggle_state = !global_toggle_state;
3536 #endif /* def FEATURE_TOGGLE */
3538 #ifdef FEATURE_STATISTICS
3540 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
3544 #endif /* def FEATURE_STATISTICS */
3546 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
3547 close_socket(csp->cfd);
3548 csp->flags &= ~CSP_FLAG_ACTIVE;
3552 #undef SELECTED_ONE_OPTION
3553 /* end of cpp switch () */
3555 if (child_id < 0) /* failed */
3557 char buf[BUFFER_SIZE];
3559 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
3561 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
3563 write_socket(csp->cfd, buf, strlen(buf));
3564 close_socket(csp->cfd);
3565 csp->flags &= ~CSP_FLAG_ACTIVE;
3576 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
3578 /* Clean up. Aim: free all memory (no leaks) */
3579 #ifdef FEATURE_GRACEFUL_TERMINATION
3581 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
3583 unload_current_config_file();
3584 unload_current_actions_file();
3585 unload_current_re_filterfile();
3586 #ifdef FEATURE_TRUST
3587 unload_current_trust_file();
3590 if (config->multi_threaded)
3597 } while ((clients->next != NULL) && (--i > 0));
3601 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
3612 #ifdef FEATURE_COOKIE_JAR
3613 if (NULL != config->jar)
3615 fclose(config->jar);
3619 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
3620 /* Cleanup - remove taskbar icon etc. */
3625 #endif /* FEATURE_GRACEFUL_TERMINATION */