1 const char jcc_rcs[] = "$Id: jcc.c,v 1.201 2008/11/02 16:48:20 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) 2001-2008 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 1.201 2008/11/02 16:48:20 fabiankeil
37 * Revert revision 1.195 and try again.
39 * Revision 1.200 2008/10/26 16:53:18 fabiankeil
42 * Revision 1.199 2008/10/26 15:36:10 fabiankeil
43 * Remove two debug messages with LOG_LEVEL_INFO.
45 * Revision 1.198 2008/10/22 15:19:55 fabiankeil
46 * Once More, With Feeling: if there is no logfile
47 * because the user didn't specify one, we shouldn't
48 * call init_error_log() after receiving SIGHUP either.
50 * Revision 1.197 2008/10/20 17:02:40 fabiankeil
51 * If SIGHUP is received while we aren't running in daemon
52 * mode, calling init_error_log() would be a mistake.
54 * Revision 1.196 2008/10/16 09:16:41 fabiankeil
55 * - Fix two gcc44 conversion warnings.
56 * - Don't bother logging the last five bytes
59 * Revision 1.195 2008/10/13 16:04:37 fabiankeil
60 * Make sure we don't try to reuse tainted server sockets.
62 * Revision 1.194 2008/10/12 18:35:18 fabiankeil
63 * The last commit was a bit too ambitious, apparently the content
64 * length adjustment is only necessary if we aren't buffering.
66 * Revision 1.193 2008/10/12 15:57:35 fabiankeil
67 * Fix content length calculation if we read headers
68 * and the start of the body at once. Now that we have
69 * FEATURE_CONNECTION_KEEP_ALIVE, it actually matters.
71 * Revision 1.192 2008/10/11 18:19:14 fabiankeil
72 * Even more chat() cosmetics.
74 * Revision 1.191 2008/10/11 18:00:14 fabiankeil
75 * Reformat some comments in chat().
77 * Revision 1.190 2008/10/11 14:58:00 fabiankeil
78 * In case of chunk-encoded content, stop reading if
79 * the buffer looks like it ends with the last chunk.
81 * Revision 1.189 2008/10/11 09:53:00 fabiankeil
82 * Let server_response_is_complete() deal properly with
83 * content that is neither buffered nor read all at once.
85 * Revision 1.188 2008/10/09 18:21:41 fabiankeil
86 * Flush work-in-progress changes to keep outgoing connections
87 * alive where possible. Incomplete and mostly #ifdef'd out.
89 * Revision 1.187 2008/09/07 12:35:05 fabiankeil
90 * Add mutex lock support for _WIN32.
92 * Revision 1.186 2008/09/04 08:13:58 fabiankeil
93 * Prepare for critical sections on Windows by adding a
94 * layer of indirection before the pthread mutex functions.
96 * Revision 1.185 2008/08/30 12:03:07 fabiankeil
97 * Remove FEATURE_COOKIE_JAR.
99 * Revision 1.184 2008/08/22 15:34:45 fabiankeil
100 * - Silence LLVM/Clang complaint.
101 * - Make received_hup_signal static.
102 * - Hide definitions for basedir, pidfile and received_hup_signal
103 * from __EMX__ as they only seem to be used in case of #ifdef unix.
105 * Revision 1.183 2008/08/21 07:09:35 fabiankeil
106 * Accept Shoutcast responses again. Problem reported
107 * and fix suggested by Stefan in #2062860.
109 * Revision 1.182 2008/06/27 11:13:56 fabiankeil
110 * Fix possible NULL-pointer dereference reported
111 * by din_a4 in #2003937. Pointy hat to me.
113 * Revision 1.181 2008/05/21 15:47:15 fabiankeil
114 * Streamline sed()'s prototype and declare
115 * the header parse and add structures static.
117 * Revision 1.180 2008/05/21 15:26:32 fabiankeil
118 * - Mark csp as immutable for send_crunch_response().
119 * - Fix comment spelling.
121 * Revision 1.179 2008/05/20 20:13:32 fabiankeil
122 * Factor update_server_headers() out of sed(), ditch the
123 * first_run hack and make server_patterns_light static.
125 * Revision 1.178 2008/05/10 13:23:38 fabiankeil
126 * Don't provide get_header() with the whole client state
127 * structure when it only needs access to csp->iob.
129 * Revision 1.177 2008/05/10 11:51:12 fabiankeil
130 * Make the "read the rest of the headers" loop a bit more readable.
132 * Revision 1.176 2008/05/10 11:37:57 fabiankeil
133 * - Instead of logging when the IIS5 hack is enabled, log when it fails.
134 * - Remove useless comment.
136 * Revision 1.175 2008/05/09 18:53:59 fabiankeil
137 * Fix comment grammar.
139 * Revision 1.174 2008/05/07 18:05:53 fabiankeil
140 * Remove the pointless buffer in client_protocol_is_unsupported().
142 * Revision 1.173 2008/05/06 15:09:00 fabiankeil
143 * Least-effort fix for bug #1821930 (reported by Lee):
144 * If the response doesn't look like HTTP,
145 * tell the client and log the problem.
147 * Revision 1.172 2008/04/16 16:38:21 fabiankeil
148 * Don't pass the whole csp structure to flush_socket()
149 * when it only needs a file descriptor and a buffer.
151 * Revision 1.171 2008/03/27 18:27:25 fabiankeil
152 * Remove kill-popups action.
154 * Revision 1.170 2008/03/06 16:33:46 fabiankeil
155 * If limit-connect isn't used, don't limit CONNECT requests to port 443.
157 * Revision 1.169 2008/03/04 18:30:39 fabiankeil
158 * Remove the treat-forbidden-connects-like-blocks action. We now
159 * use the "blocked" page for forbidden CONNECT requests by default.
161 * Revision 1.168 2008/03/02 12:25:25 fabiankeil
162 * Also use shiny new connect_port_is_forbidden() in jcc.c.
164 * Revision 1.167 2008/02/23 16:57:12 fabiankeil
165 * Rename url_actions() to get_url_actions() and let it
166 * use the standard parameter ordering.
168 * Revision 1.166 2008/02/23 16:33:43 fabiankeil
169 * Let forward_url() use the standard parameter ordering
170 * and mark its second parameter immutable.
172 * Revision 1.165 2008/02/02 19:36:56 fabiankeil
173 * Remove the "Listening ... for local connections only" log message.
174 * Whether or not remote connections are able to reach Privoxy is up
175 * to the operating system.
177 * Revision 1.164 2007/12/16 18:32:46 fabiankeil
178 * Prevent the log messages for CONNECT requests to unacceptable
179 * ports from printing the limit-connect argument as [null] if
180 * limit-connect hasn't been explicitly enabled.
182 * Revision 1.163 2007/12/13 01:47:11 david__schmidt
183 * Make sure all console-mode apps get a usage() instance
185 * Revision 1.162 2007/12/06 17:54:57 fabiankeil
186 * Reword NO_SERVER_DATA_RESPONSE to make it harder
187 * to misunderstand what the message is all about.
189 * Revision 1.161 2007/12/04 19:44:22 fabiankeil
190 * Unbreak trustfile which previously didn't work without
191 * FEATURE_TOGGLE. Fixes BR#1843585, reported by Lee.
193 * Revision 1.160 2007/11/29 18:00:29 fabiankeil
194 * Plug memory leak. Spotted by Valgrind, triggered by
195 * Privoxy-Regression-Test feeding proxyfuzz.py.
197 * Revision 1.159 2007/11/24 14:34:09 fabiankeil
198 * In the HTTP snipplets, refer to the client as client.
200 * Revision 1.158 2007/11/11 16:44:17 fabiankeil
201 * Emit a log message when activating the MS IIS5 hack.
203 * Revision 1.157 2007/11/03 17:34:49 fabiankeil
204 * Log the "weak randomization factor" warning only
205 * once for mingw32 and provide some more details.
207 * Revision 1.156 2007/11/01 18:20:58 fabiankeil
208 * Initialize log module after initializing mutexes, future
209 * deadlocks in that code should now work cross-platform.
211 * Revision 1.155 2007/10/23 20:12:45 fabiankeil
212 * Fix first CSUCCEED line to end in \r\n as required by RFC1945.
213 * Reported by Bert van Leeuwen in BR#1818808.
215 * Revision 1.154 2007/10/19 17:00:08 fabiankeil
216 * Downgrade "Flushing header and buffers" message to LOG_LEVEL_INFO.
218 * Revision 1.153 2007/10/14 14:12:41 fabiankeil
219 * When in daemon mode, close stderr after the configuration file has been
220 * parsed the first time. If logfile isn't set, stop logging. Fixes BR#897436.
222 * Revision 1.152 2007/10/04 18:03:34 fabiankeil
223 * - Fix a crash when parsing invalid requests whose first header
224 * is rejected by get_header(). Regression (re?)introduced
225 * in r1.143 by yours truly.
226 * - Move ACTION_VANILLA_WAFER handling into parsers.c's
227 * client_cookie_adder() to make sure send-vanilla-wafer can be
228 * controlled through tags (and thus regression-tested).
230 * Revision 1.151 2007/09/29 10:21:16 fabiankeil
231 * - Move get_filter_function() from jcc.c to filters.c
232 * so the filter functions can be static.
233 * - Don't bother filtering body-less responses.
235 * Revision 1.150 2007/09/28 16:39:29 fabiankeil
236 * Execute content filters through execute_content_filter().
238 * Revision 1.149 2007/09/04 15:08:48 fabiankeil
239 * Initialize req to NULL to make sure it's defined if the
240 * first read_socket() call fails. Reported by icmp30.
242 * Revision 1.148 2007/08/26 16:47:13 fabiankeil
243 * Add Stephen Gildea's --pre-chroot-nslookup patch [#1276666],
244 * extensive comments moved to user manual.
246 * Revision 1.147 2007/08/25 14:42:40 fabiankeil
247 * Don't crash if a broken header filter wiped out the request line.
249 * Revision 1.146 2007/08/20 17:09:32 fabiankeil
250 * Fix byte_count calculation in case of flushes
251 * and don't parse the server headers a second time.
253 * Revision 1.145 2007/08/19 13:13:31 fabiankeil
254 * - If there's a connection problem after we already forwarded
255 * parts of the original content, just hang up. Fixes BR#1776724.
256 * - Fix warnings about unused code on mingw32.
257 * - In case of flushes, calculate the byte count
258 * less incorrectly (I think).
260 * Revision 1.144 2007/08/11 14:43:22 fabiankeil
261 * Add some more prototypes for static functions.
263 * Revision 1.143 2007/08/05 13:58:19 fabiankeil
264 * Comment out request_contains_null_bytes() until it's used again.
266 * Revision 1.142 2007/08/05 13:50:26 fabiankeil
267 * #1763173 from Stefan Huehner: s@const static@static const@
268 * and declare some more functions static.
270 * Revision 1.141 2007/08/04 09:56:23 fabiankeil
271 * - Log rejected CONNECT requests with LOG_LEVEL_INFO
272 * and explain why they were rejected in the first place.
273 * - Fix the LOG_LEVEL_CLF message for crunches of unallowed
274 * CONNECT requests. The request line was missing.
275 * - Add two more XXX reminders as we don't have enough already.
277 * Revision 1.140 2007/07/21 11:51:36 fabiankeil
278 * As Hal noticed, checking dispatch_cgi() as the last cruncher
279 * looks like a bug if CGI requests are blocked unintentionally,
280 * so don't do it unless the user enabled the new config option
281 * "allow-cgi-request-crunching".
283 * Revision 1.139 2007/07/14 07:46:41 fabiankeil
284 * - Allow to rewrite the request destination behind the client's back.
285 * - Turn the weird-looking unconditional for loop that
286 * reads the client request into a conditional while loop.
287 * Move the stuff that only runs once out of the loop.
288 * - Move parts of chat(), server_content_type() and the
289 * necessary stuff to fix BR#1750917 into get_filter_function().
291 * Revision 1.138 2007/06/03 18:45:18 fabiankeil
292 * Temporary workaround for BR#1730105.
294 * Revision 1.137 2007/06/01 18:16:36 fabiankeil
295 * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
296 * deadlocks and crashes on OpenBSD and possibly other OS with neither
297 * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
298 * Thanks to Ralf Horstmann for report and solution.
300 * Revision 1.136 2007/06/01 16:41:11 fabiankeil
301 * Add forward-override{} to change the forwarding settings through
302 * action sections. This is mainly interesting to forward different
303 * clients differently (for example based on User-Agent or request
306 * Revision 1.135 2007/05/24 17:03:50 fabiankeil
307 * - Let usage() mention the --chroot parameter.
308 * - Use read_socket() consistently and always leave
309 * the last buffer byte alone, even in cases where
310 * null termination (currently) doesn't matter.
312 * Revision 1.134 2007/05/16 14:59:46 fabiankeil
313 * - Fix config file loading on Unix if no config file is specified.
314 * Since r1.97 Privoxy would always interpret the last argument as
315 * config file, even if it's a valid command line option.
316 * - Abort in case of unrecognized command line options. Closes #1719696.
317 * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
318 * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
320 * Revision 1.133 2007/05/04 11:23:19 fabiankeil
321 * - Don't rerun crunchers that only depend on the request URL.
322 * - Don't count redirects and CGI requests as "blocked requests".
324 * Revision 1.132 2007/04/25 15:15:17 fabiankeil
325 * Support crunching based on tags created by server-header taggers.
327 * Revision 1.131 2007/04/22 13:24:50 fabiankeil
328 * Make HTTP snippets static (again). Add a Content-Type for those
329 * with content so the browser doesn't guess it based on the URL.
331 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
332 * Move crunching and request line rebuilding out of chat().
334 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
335 * Introduce tags as alternative way to specify which
336 * actions apply to a request. At the moment tags can be
337 * created based on client and server headers.
339 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
340 * Don't CLF-log CONNECT requests twice.
342 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
343 * Log the source address for ACL-related connection drops.
345 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
346 * New config option: enforce-blocks.
348 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
349 * - Move null byte check into separate function.
350 * - Don't confuse the client with error pages
351 * if a CONNECT request was already confirmed.
353 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
354 * Speed up NULL byte escaping and only log the complete
355 * NULL byte requests with header debugging enabled.
357 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
358 * Answer requests that contain NULL bytes with
359 * a custom response instead of waiting for more
360 * data until the client eventually hangs up.
362 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
363 * - Move delivery and logging of crunched responses
364 * from chat() into send_crunch_response().
365 * - Display the reason for generating http_responses.
366 * - Log the content length for LOG_LEVEL_CLF correctly
367 * (still incorrect for some fixed responses).
368 * - Reword an incorrect comment about
369 * treat-forbidden-connects-like-blocks violating
371 * - Add some log messages.
373 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
374 * Move mutex initialization into separate
375 * function and exit in case of errors.
377 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
378 * - Start to reduce chat()'s line count and move
379 * parts of it into separate functions.
380 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
382 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
383 * - Add Proxy-Agent header to HTTP snippets that are
384 * supposed to reach HTTP clients only.
385 * - Made a few CONNECT log messages more descriptive.
386 * - Catch completely empty server responses (as seen
387 * with Tor's fake ".noconnect" top level domain).
388 * - Use shiny new "forwarding-failed" template for socks errors.
390 * Revision 1.118 2007/01/07 07:43:43 joergs
391 * AmigaOS4 support added.
393 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
394 * Added config option accept-intercepted-requests
395 * and disabled it by default.
397 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
398 * Reverted parts of my last commit
399 * to keep error handling working.
401 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
402 * Fixed gcc43 conversion warnings.
404 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
405 * Fix -pedantic ISO C warning about converting
406 * from function pointer to object pointer.
408 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
409 * Silence compiler warning I introduced with my last commit.
411 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
412 * Mutex protect rand() if POSIX threading
413 * is used, warn the user if that's not possible
414 * and stop using it on _WIN32 where it could
417 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
418 * Don't prevent core dumps by catching SIGABRT.
419 * It's rude and makes debugging unreasonable painful.
421 * Revision 1.110 2006/12/13 14:52:53 etresoft
422 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
424 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
425 * Privoxy is now able to run as intercepting
426 * proxy in combination with any packet filter
427 * that does the port redirection. The destination
428 * is extracted from the "Host:" header which
429 * should be available for nearly all requests.
431 * Moved HTTP snipplets into jcc.c.
432 * Added error message for gopher proxy requests.
434 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
435 * Only unlink the pidfile if it's actually used.
437 * Change order of interception checks to make
438 * it possible to block or redirect requests for
441 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
442 * Make pthread mutex locking more generic. Instead of
443 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
444 * and use mutex locking unless there is an _r function
445 * available. Better safe than sorry.
447 * Fixes "./configure --disable-pthread" and should result
448 * in less threading-related problems on pthread-using platforms,
449 * but it still doesn't fix BR#1122404.
451 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
452 * Move pthread.h inclusion from jcc.c to jcc.h.
453 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
455 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
456 * Don't exit after receiving the second SIGHUP on Solaris.
458 * Fixes BR 1052235, but the same problem may exist on other
459 * systems. Once 3.0.6 is out we should use sigset()
460 * where available and see if it breaks anything.
462 * Revision 1.104 2006/09/23 13:26:38 roro
463 * Replace TABs by spaces in source code.
465 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
466 * Fix +redirect{}. Didn't work with -fast-redirects.
468 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
469 * Respond with 400 and a short text message
470 * if the client tries to use Privoxy as FTP proxy.
472 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
473 * Make number of retries in case of forwarded-connect problems
474 * a config file option (forwarded-connect-retries) and use 0 as
477 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
478 * Set random(3) seed.
480 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
481 * Follow the OpenBSD port's lead and protect the resolve
482 * functions on OpenBSD as well.
484 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
485 * --user fix. Only use the user as group if no group is specified.
486 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
488 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
489 * Windows service (re-)integration
493 * --install[:service_name]
494 * --uninstall[:service_name]
497 * They work as follows:
498 * --install will create a service for you and then terminate.
499 * By default the service name will be "privoxy" (without the quotes).
500 * However you can run multiple services if you wish, just by adding
501 * a colon and then a name (no spaces).
503 * --uninstall follows the exact same rules a --install.
505 * --service is used when the program is executed by the service
506 * control manager, and in normal circumstances would never be
507 * used as a command line argument.
509 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
510 * Windows service integration
512 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
513 * Incorporate Fabian Keil's patch work:
514 http://www.fabiankeil.de/sourcecode/privoxy/
516 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
517 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
518 * with what was really the latest development (the v_3_0_branch branch)
520 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
521 * Thanks to Jindrich Makovicka for a race condition fix for the log
522 * file. The race condition remains for non-pthread implementations.
523 * Reference patch #1175720.
525 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
526 * Add the ability to check jpeg images for invalid
527 * lengths of comment blocks. Defensive strategy
528 * against the exploit:
529 * Microsoft Security Bulletin MS04-028
530 * Buffer Overrun in JPEG Processing (GDI+) Could
531 * Allow Code Execution (833987)
532 * Enabled with +inspect-jpegs in actions files.
534 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
535 * - Fixed usage info for non-unix platforms
536 * - Fixed small cmdline parsing bug
538 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
539 * Diagnostics: Now preserve the returncode of pthread_create
540 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
542 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
543 * No longer ignore SIGCHLD. Fixes bug #769381
545 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
546 * Close jarfile on graceful exit, remove stray line
548 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
549 * Cosmetics: Killed a warning, a typo and an allocation left at exit
551 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
552 * No longer rely on non-POSIX.1 extensions of getcwd().
555 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
556 * Replaced setenv() by posix-compliant putenv()
557 * Thanks to Neil McCalden (nmcc AT users.sf.net).
559 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
560 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
562 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
563 * Clean-up and extension of improvements for forked mode:
564 * - Child's return code now consists of flags RC_FLAG_*
565 * - Reporting toggle to parent now properly #ifdef'ed
566 * - Children now report blocking to parent. This enables
567 * statistics in forked mode
569 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
570 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
571 * Children now report having been toggled through _exit(17), parents
572 * watch for that code and toggle themselves if found.
574 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
575 * Wrapping all *_r functions (the non-_r versions of them) with
576 * mutex semaphores for OSX. Hopefully this will take care of all
577 * of those pesky crash reports.
579 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
580 * Fixed two mostly harmless mem leaks
582 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
583 * Fix: Head of global clients list now initialized to NULL
585 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
586 * Added basic support for OPTIONS and TRACE HTTP methods:
587 * - New interceptor direct_response() added in chat().
588 * - sed() moved to earlier in the process, so that the
589 * Host: header is evaluated before actions and forwarding
592 * Revision 1.92 2002/05/08 16:00:46 oes
593 * Chat's buffer handling:
594 * - Fixed bug with unchecked out-of-mem conditions
595 * while reading client request & server headers
596 * - No longer predict if the buffer limit will be exceeded
597 * in the next read -- check add_to_iob's new
598 * return code. If buffer couldn't be extended
599 * (policy or out-of-mem) while
600 * - reading from client: abort
601 * - reading server headers: send error page
602 * - buffering server body for filter: flush,
603 * and if that fails: send error page
605 * Revision 1.91 2002/04/08 20:35:58 swa
608 * Revision 1.90 2002/04/02 14:57:28 oes
609 * Made sending wafers independent of FEATURE_COOKIE_JAR
611 * Revision 1.89 2002/03/31 17:18:59 jongfoster
612 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
614 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
615 * More compiler warning message maintenance
617 * Revision 1.87 2002/03/26 22:29:54 swa
618 * we have a new homepage!
620 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
621 * Workaround for closing the jarfile before load_config() comes around again
623 * Revision 1.85 2002/03/24 15:23:33 jongfoster
626 * Revision 1.84 2002/03/24 13:25:43 swa
627 * name change related issues
629 * Revision 1.83 2002/03/16 23:54:06 jongfoster
630 * Adding graceful termination feature, to help look for memory leaks.
631 * If you enable this (which, by design, has to be done by hand
632 * editing config.h) and then go to http://i.j.b/die, then the program
633 * will exit cleanly after the *next* request. It should free all the
634 * memory that was used.
636 * Revision 1.82 2002/03/13 00:27:05 jongfoster
639 * Revision 1.81 2002/03/12 01:42:50 oes
640 * Introduced modular filters
642 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
643 * OS/2 port maintenance:
644 * - Fixed EMX build - it had decayed a little
645 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
646 * substituted a memset for now.
648 * Revision 1.79 2002/03/09 20:03:52 jongfoster
649 * - Making various functions return int rather than size_t.
650 * (Undoing a recent change). Since size_t is unsigned on
651 * Windows, functions like read_socket that return -1 on
652 * error cannot return a size_t.
654 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
655 * crashes, and also frequently caused JB to jump to 100%
656 * CPU and stay there. (Because it thought it had just
657 * read ((unsigned)-1) == 4Gb of data...)
659 * - The signature of write_socket has changed, it now simply
660 * returns success=0/failure=nonzero.
662 * - Trying to get rid of a few warnings --with-debug on
663 * Windows, I've introduced a new type "jb_socket". This is
664 * used for the socket file descriptors. On Windows, this
665 * is SOCKET (a typedef for unsigned). Everywhere else, it's
666 * an int. The error value can't be -1 any more, so it's
667 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
668 * Windows it maps to the #define INVALID_SOCKET.)
670 * - The signature of bind_port has changed.
672 * Revision 1.78 2002/03/08 21:35:04 oes
673 * Added optional group supplement to --user option. Will now use default group of user if no group given
675 * Revision 1.77 2002/03/07 03:52:06 oes
676 * - Fixed compiler warnings etc
677 * - Improved handling of failed DNS lookups
679 * Revision 1.76 2002/03/06 22:54:35 jongfoster
680 * Automated function-comment nitpicking.
682 * Revision 1.75 2002/03/06 10:02:19 oes
683 * Fixed stupid bug when --user was not given
685 * Revision 1.74 2002/03/06 00:49:31 jongfoster
686 * Fixing warning on Windows
687 * Making #ifdefs that refer to the same variable consistently
688 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
690 * Revision 1.73 2002/03/05 23:57:30 hal9
691 * Stray character 's' on line 1618 was breaking build.
693 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
694 * - Re-enable OS/2 building after new parms were added
695 * - Fix false out of memory report when resolving CGI templates when no IP
696 * address is available of failed attempt (a la no such domain)
698 * Revision 1.71 2002/03/05 18:13:56 oes
699 * Added --user option
701 * Revision 1.70 2002/03/05 04:52:42 oes
702 * Deleted non-errlog debugging code
704 * Revision 1.69 2002/03/04 23:50:00 jongfoster
705 * Splitting off bind_port() call into bind_port_helper(), with
708 * Revision 1.68 2002/03/04 20:17:32 oes
711 * Revision 1.67 2002/03/04 18:18:57 oes
712 * - Removed _DEBUG mode
713 * - Cleand up cmdline parsing
714 * - Introduced --no-daemon, --pidfile options
715 * - Cleaned up signal handling:
716 * - Terminate cleanly on INT, TERM and ABRT
717 * - Schedule logfile for re-opening on HUP
718 * - Ignore CHLD and PIPE
719 * - Leave the rest with their default handlers
720 * - Uniform handler registration
721 * - Added usage() function
722 * - Played styleguide police
724 * Revision 1.66 2002/03/03 15:06:55 oes
725 * Re-enabled automatic config reloading
727 * Revision 1.65 2002/03/03 14:49:11 oes
728 * Fixed CLF logging: Now uses client's original HTTP request
730 * Revision 1.64 2002/03/03 09:18:03 joergs
731 * Made jumbjuster work on AmigaOS again.
733 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
734 * Clean up a little CRLF unpleasantness that suddenly appeared
736 * Revision 1.62 2002/02/20 23:17:23 jongfoster
737 * Detecting some out-of memory conditions and exiting with a log message.
739 * Revision 1.61 2002/01/17 21:01:52 jongfoster
740 * Moving all our URL and URL pattern parsing code to urlmatch.c.
742 * Revision 1.60 2001/12/30 14:07:32 steudten
743 * - Add signal handling (unix)
744 * - Add SIGHUP handler (unix)
745 * - Add creation of pidfile (unix)
746 * - Add action 'top' in rc file (RH)
747 * - Add entry 'SIGNALS' to manpage
748 * - Add exit message to logfile (unix)
750 * Revision 1.59 2001/12/13 14:07:18 oes
751 * Fixed Bug: 503 error page now sent OK
753 * Revision 1.58 2001/11/30 23:37:24 jongfoster
754 * Renaming the Win32 config file to config.txt - this is almost the
755 * same as the corresponding UNIX name "config"
757 * Revision 1.57 2001/11/16 00:47:43 jongfoster
758 * Changing the tty-disconnection code to use setsid().
760 * Revision 1.56 2001/11/13 20:20:54 jongfoster
761 * Tabs->spaces, fixing a bug with missing {} around an if()
763 * Revision 1.55 2001/11/13 20:14:53 jongfoster
764 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
766 * Revision 1.54 2001/11/07 00:03:14 steudten
767 * Give reliable return value if an error
768 * occurs not just 0 with new daemon mode.
770 * Revision 1.53 2001/11/05 21:41:43 steudten
771 * Add changes to be a real daemon just for unix os.
772 * (change cwd to /, detach from controlling tty, set
773 * process group and session leader to the own process.
775 * Add some fatal-error log message for failed malloc().
776 * Add '-d' if compiled with 'configure --with-debug' to
777 * enable debug output.
779 * Revision 1.52 2001/10/26 20:11:20 jongfoster
780 * Fixing type mismatch
782 * Revision 1.51 2001/10/26 17:38:28 oes
785 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
786 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
787 * threads to call select() simultaneously. So, it's time to do a real, live,
788 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
789 * (native). Both versions will work, but using __OS2__ offers multi-threading.
791 * Revision 1.49 2001/10/23 21:41:35 jongfoster
792 * Added call to initialize the (statically-allocated of course)
793 * "out of memory" CGI response.
795 * Revision 1.48 2001/10/10 19:56:46 jongfoster
796 * Moving some code that wasn't cookie-related out of an #ifdef
799 * Revision 1.47 2001/10/10 16:44:36 oes
800 * Added CONNECT destination port limitation check
802 * Revision 1.46 2001/10/08 15:17:41 oes
803 * Re-enabled SSL forwarding
805 * Revision 1.45 2001/10/07 15:42:11 oes
806 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
808 * Moved downgrading of the HTTP version from parse_http_request to
809 * chat(), since we can't decide if it is necessary before we have
810 * determined the actions for the URL. The HTTP command is now
811 * *always* re-built so the repairs need no longer be special-cased.
813 * filter_popups now gets a csp pointer so it can raise the new
814 * CSP_FLAG_MODIFIED flag.
818 * Added configurable size limit for the IOB. If the IOB grows so
819 * large that the next read would exceed the limit, the header
820 * is generated, and the header & unfiltered buffer are flushed
821 * to the client. Chat then continues in non-buffering,
822 * non-filtering body mode.
824 * Revision 1.44 2001/10/02 18:13:57 oes
827 * Revision 1.43 2001/10/02 15:32:13 oes
828 * Moved generation of hdr
830 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
831 * Cleaning up 2 compiler warnings on OS/2.
833 * Revision 1.41 2001/09/16 17:05:14 jongfoster
834 * Removing unused #include showarg.h
836 * Revision 1.40 2001/09/16 15:41:45 jongfoster
837 * Fixing signed/unsigned comparison warning.
839 * Revision 1.39 2001/09/16 13:21:27 jongfoster
840 * Changes to use new list functions.
842 * Revision 1.38 2001/09/16 13:01:46 jongfoster
843 * Removing redundant function call that zeroed zalloc()'d memory.
845 * Revision 1.37 2001/09/10 11:12:24 oes
846 * Deleted unused variable
848 * Revision 1.36 2001/09/10 10:56:15 oes
849 * Silenced compiler warnings
851 * Revision 1.35 2001/07/31 14:44:22 oes
852 * Deleted unused size parameter from filter_popups()
854 * Revision 1.34 2001/07/30 22:08:36 jongfoster
855 * Tidying up #defines:
856 * - All feature #defines are now of the form FEATURE_xxx
857 * - Permanently turned off WIN_GUI_EDIT
858 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
860 * Revision 1.33 2001/07/29 19:32:00 jongfoster
861 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
863 * Revision 1.32 2001/07/29 18:47:05 jongfoster
864 * Adding missing #include "loadcfg.h"
866 * Revision 1.31 2001/07/29 12:17:48 oes
867 * Applied pthread fix by Paul Lieverse
869 * Revision 1.30 2001/07/25 22:57:13 jongfoster
870 * __BEOS__ no longer overrides FEATURE_PTHREAD.
871 * This is because FEATURE_PTHREAD will soon be widely used, so I
872 * want to keep it simple.
874 * Revision 1.29 2001/07/24 12:47:06 oes
875 * Applied BeOS support update by Eugenia
877 * Revision 1.28 2001/07/23 13:26:12 oes
878 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
880 * Revision 1.27 2001/07/19 19:09:47 haroon
881 * - Added code to take care of the situation where while processing the first
882 * server response (which includes the server header), after finding the end
883 * of the headers we were not looking past the end of the headers for
884 * content modification. I enabled it for filter_popups.
885 * Someone else should look to see if other similar operations should be
886 * done to the discarded portion of the buffer.
888 * Note 2001/07/20: No, the other content modification mechanisms will process
889 * the whole iob later anyway. --oes
891 * Revision 1.26 2001/07/18 12:31:36 oes
894 * Revision 1.25 2001/07/15 19:43:49 jongfoster
895 * Supports POSIX threads.
896 * Also removed some unused #includes.
898 * Revision 1.24 2001/07/13 14:00:40 oes
899 * - Generic content modification scheme:
900 * Each feature has its own applicability flag that is set
901 * from csp->action->flags.
902 * Replaced the "filtering" int flag , by a function pointer
903 * "content_filter" to the function that will do the content
904 * modification. If it is != NULL, the document will be buffered
905 * and processed through *content_filter, which must set
906 * csp->content_length and return a modified copy of the body
907 * or return NULL (on failiure).
908 * - Changed csp->is_text to the more generic bitmap csp->content_type
909 * which can currently take the valued CT_TEXT or CT_GIF
911 * - Removed all #ifdef PCRS
913 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
914 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
915 * the `block_acl' call. This prevents a compilation error when the user
916 * does not wish to use the "ACL" feature.
918 * Revision 1.22 2001/06/29 21:45:41 oes
919 * Indentation, CRLF->LF, Tab-> Space
921 * Revision 1.21 2001/06/29 13:29:36 oes
922 * - Cleaned up, improved comments
923 * - Unified all possible interceptors (CGI,
924 * block, trust, fast_redirect) in one
925 * place, with one (CGI) answer generation
926 * mechansim. Much clearer now.
927 * - Removed the GIF image generation, which
928 * is now done in filters.c:block_url()
929 * - Made error conditions like domain lookup
930 * failiure or (various) problems while talking
931 * to the server use cgi.c:error_response()
932 * instead of generating HTML/HTTP in chat() (yuck!)
933 * - Removed logentry from cancelled commit
935 * Revision 1.20 2001/06/09 10:55:28 jongfoster
936 * Changing BUFSIZ ==> BUFFER_SIZE
938 * Revision 1.19 2001/06/07 23:12:52 jongfoster
939 * Replacing function pointer in struct gateway with a directly
940 * called function forwarded_connect().
941 * Replacing struct gateway with struct forward_spec
943 * Revision 1.18 2001/06/03 19:12:16 oes
944 * introduced new cgi handling
946 * Revision 1.17 2001/06/01 20:07:23 jongfoster
947 * Now uses action +image-blocker{} rather than config->tinygif
949 * Revision 1.16 2001/06/01 18:49:17 jongfoster
950 * Replaced "list_share" with "list" - the tiny memory gain was not
951 * worth the extra complexity.
953 * Revision 1.15 2001/05/31 21:24:47 jongfoster
954 * Changed "permission" to "action" throughout.
955 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
956 * Moved vanilla wafer check into chat(), since we must now
957 * decide whether or not to add it based on the URL.
959 * Revision 1.14 2001/05/29 20:14:01 joergs
960 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
963 * Revision 1.13 2001/05/29 09:50:24 jongfoster
964 * Unified blocklist/imagelist/permissionslist.
965 * File format is still under discussion, but the internal changes
968 * Also modified interceptor behaviour:
969 * - We now intercept all URLs beginning with one of the following
970 * prefixes (and *only* these prefixes):
972 * * http://ijbswa.sf.net/config/
973 * * http://ijbswa.sourceforge.net/config/
974 * - New interceptors "home page" - go to http://i.j.b/ to see it.
975 * - Internal changes so that intercepted and fast redirect pages
976 * are not replaced with an image.
977 * - Interceptors now have the option to send a binary page direct
978 * to the client. (i.e. ijb-send-banner uses this)
979 * - Implemented show-url-info interceptor. (Which is why I needed
980 * the above interceptors changes - a typical URL is
981 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
982 * The previous mechanism would not have intercepted that, and
983 * if it had been intercepted then it then it would have replaced
986 * Revision 1.12 2001/05/27 22:17:04 oes
988 * - re_process_buffer no longer writes the modified buffer
989 * to the client, which was very ugly. It now returns the
990 * buffer, which it is then written by chat.
992 * - content_length now adjusts the Content-Length: header
993 * for modified documents rather than crunch()ing it.
994 * (Length info in csp->content_length, which is 0 for
995 * unmodified documents)
997 * - For this to work, sed() is called twice when filtering.
999 * Revision 1.11 2001/05/26 17:27:53 jongfoster
1000 * Added support for CLF and fixed LOG_LEVEL_LOG.
1001 * Also did CRLF->LF fix of my previous patch.
1003 * Revision 1.10 2001/05/26 15:26:15 jongfoster
1004 * ACL feature now provides more security by immediately dropping
1005 * connections from untrusted hosts.
1007 * Revision 1.9 2001/05/26 00:28:36 jongfoster
1008 * Automatic reloading of config file.
1009 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
1010 * Most of the global variables have been moved to a new
1011 * struct configuration_spec, accessed through csp->config->globalname
1012 * Most of the globals remaining are used by the Win32 GUI.
1014 * Revision 1.8 2001/05/25 22:43:18 jongfoster
1015 * Fixing minor memory leak and buffer overflow.
1017 * Revision 1.7 2001/05/25 22:34:30 jongfoster
1020 * Revision 1.6 2001/05/23 00:13:58 joergs
1021 * AmigaOS support fixed.
1023 * Revision 1.5 2001/05/22 18:46:04 oes
1025 * - Enabled filtering banners by size rather than URL
1026 * by adding patterns that replace all standard banner
1027 * sizes with the "Junkbuster" gif to the re_filterfile
1029 * - Enabled filtering WebBugs by providing a pattern
1030 * which kills all 1x1 images
1032 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
1033 * which is selected by the (nonstandard and therefore
1034 * capital) letter 'U' in the option string.
1035 * It causes the quantifiers to be ungreedy by default.
1036 * Appending a ? turns back to greedy (!).
1038 * - Added a new interceptor ijb-send-banner, which
1039 * sends back the "Junkbuster" gif. Without imagelist or
1040 * MSIE detection support, or if tinygif = 1, or the
1041 * URL isn't recognized as an imageurl, a lame HTML
1042 * explanation is sent instead.
1044 * - Added new feature, which permits blocking remote
1045 * script redirects and firing back a local redirect
1047 * The feature is conditionally compiled, i.e. it
1048 * can be disabled with --disable-fast-redirects,
1049 * plus it must be activated by a "fast-redirects"
1050 * line in the config file, has its own log level
1051 * and of course wants to be displayed by show-proxy-args
1052 * Note: Boy, all the #ifdefs in 1001 locations and
1053 * all the fumbling with configure.in and acconfig.h
1054 * were *way* more work than the feature itself :-(
1056 * - Because a generic redirect template was needed for
1057 * this, tinygif = 3 now uses the same.
1059 * - Moved GIFs, and other static HTTP response templates
1062 * - Some minor fixes
1064 * - Removed some >400 CRs again (Jon, you really worked
1067 * Revision 1.4 2001/05/21 19:34:01 jongfoster
1068 * Made failure to bind() a fatal error.
1070 * Revision 1.3 2001/05/20 01:21:20 jongfoster
1071 * Version 2.9.4 checkin.
1072 * - Merged popupfile and cookiefile, and added control over PCRS
1073 * filtering, in new "permissionsfile".
1074 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
1075 * file error you now get a message box (in the Win32 GUI) rather
1076 * than the program exiting with no explanation.
1077 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
1079 * - Removed tabs from "config"
1080 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
1081 * - Bumped up version number.
1083 * Revision 1.2 2001/05/17 22:34:44 oes
1084 * - Added hint on GIF char array generation to jcc.c
1085 * - Cleaned CRLF's from the sources and related files
1086 * - Repaired logging for REF and FRC
1088 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
1089 * Initial import of version 2.9.3 source tree
1092 *********************************************************************/
1098 #include <sys/types.h>
1107 # ifndef FEATURE_PTHREAD
1111 # include <windows.h>
1112 # include <process.h>
1113 # endif /* ndef FEATURE_PTHREAD */
1116 # ifndef _WIN_CONSOLE
1117 # include "w32log.h"
1118 # endif /* ndef _WIN_CONSOLE */
1119 # include "w32svrapi.h"
1121 #else /* ifndef _WIN32 */
1123 # if !defined (__OS2__)
1124 # include <unistd.h>
1125 # include <sys/wait.h>
1126 # endif /* ndef __OS2__ */
1127 # include <sys/time.h>
1128 # include <sys/stat.h>
1129 # include <sys/ioctl.h>
1132 #include <sys/termios.h>
1140 # include <signal.h>
1143 # include <socket.h> /* BeOS has select() for sockets only. */
1144 # include <OS.h> /* declarations for threads and stuff. */
1147 # if defined(__EMX__) || defined(__OS2__)
1148 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
1153 #define bzero(B,N) memset(B,0x00,n)
1157 # include <select.h>
1162 #include "project.h"
1165 #include "filters.h"
1166 #include "loaders.h"
1167 #include "parsers.h"
1168 #include "miscutil.h"
1170 #include "jbsockets.h"
1171 #include "gateway.h"
1172 #include "actions.h"
1174 #include "loadcfg.h"
1175 #include "urlmatch.h"
1177 const char jcc_h_rcs[] = JCC_H_VERSION;
1178 const char project_h_rcs[] = PROJECT_H_VERSION;
1181 struct client_state clients[1];
1182 struct file_list files[1];
1184 #ifdef FEATURE_STATISTICS
1185 int urls_read = 0; /* total nr of urls read inc rejected */
1186 int urls_rejected = 0; /* total nr of urls rejected */
1187 #endif /* def FEATURE_STATISTICS */
1189 #ifdef FEATURE_GRACEFUL_TERMINATION
1190 int g_terminate = 0;
1193 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1194 static void sig_handler(int the_signal);
1196 static int client_protocol_is_unsupported(const struct client_state *csp, char *req);
1197 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
1198 static jb_err get_server_headers(struct client_state *csp);
1199 static const char *crunch_reason(const struct http_response *rsp);
1200 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp);
1202 * static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len);
1204 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
1205 static jb_err change_request_destination(struct client_state *csp);
1206 static void chat(struct client_state *csp);
1207 static void serve(struct client_state *csp);
1208 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1209 static void usage(const char *myname);
1211 static void initialize_mutexes(void);
1212 static jb_socket bind_port_helper(struct configuration_spec *config);
1213 static void listen_loop(void);
1216 void serve(struct client_state *csp);
1217 #else /* ifndef AMIGA */
1218 static void serve(struct client_state *csp);
1219 #endif /* def AMIGA */
1222 static int32 server_thread(void *data);
1223 #endif /* def __BEOS__ */
1226 #define sleep(N) Sleep(((N) * 1000))
1230 #define sleep(N) DosSleep(((N) * 100))
1233 #ifdef MUTEX_LOCKS_AVAILABLE
1235 * XXX: Does the locking stuff really belong in this file?
1237 privoxy_mutex_t log_mutex;
1238 privoxy_mutex_t log_init_mutex;
1239 privoxy_mutex_t connection_reuse_mutex;
1241 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
1242 privoxy_mutex_t resolver_mutex;
1243 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
1245 #ifndef HAVE_GMTIME_R
1246 privoxy_mutex_t gmtime_mutex;
1247 #endif /* ndef HAVE_GMTIME_R */
1249 #ifndef HAVE_LOCALTIME_R
1250 privoxy_mutex_t localtime_mutex;
1251 #endif /* ndef HAVE_GMTIME_R */
1254 privoxy_mutex_t rand_mutex;
1255 #endif /* ndef HAVE_RANDOM */
1257 #endif /* def MUTEX_LOCKS_AVAILABLE */
1260 const char *basedir = NULL;
1261 const char *pidfile = NULL;
1262 static int received_hup_signal = 0;
1263 #endif /* defined unix */
1265 /* HTTP snipplets. */
1266 static const char CSUCCEED[] =
1267 "HTTP/1.0 200 Connection established\r\n"
1268 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
1270 static const char CHEADER[] =
1271 "HTTP/1.0 400 Invalid header received from client\r\n"
1272 "Proxy-Agent: Privoxy " VERSION "\r\n"
1273 "Content-Type: text/plain\r\n"
1274 "Connection: close\r\n\r\n"
1275 "Invalid header received from client.\r\n";
1277 static const char FTP_RESPONSE[] =
1278 "HTTP/1.0 400 Invalid request received from client\r\n"
1279 "Content-Type: text/plain\r\n"
1280 "Connection: close\r\n\r\n"
1281 "Invalid request. Privoxy doesn't support FTP.\r\n";
1283 static const char GOPHER_RESPONSE[] =
1284 "HTTP/1.0 400 Invalid request received from client\r\n"
1285 "Content-Type: text/plain\r\n"
1286 "Connection: close\r\n\r\n"
1287 "Invalid request. Privoxy doesn't support gopher.\r\n";
1289 /* XXX: should be a template */
1290 static const char MISSING_DESTINATION_RESPONSE[] =
1291 "HTTP/1.0 400 Bad request received from client\r\n"
1292 "Proxy-Agent: Privoxy " VERSION "\r\n"
1293 "Content-Type: text/plain\r\n"
1294 "Connection: close\r\n\r\n"
1295 "Bad request. Privoxy was unable to extract the destination.\r\n";
1297 /* XXX: should be a template */
1298 static const char NO_SERVER_DATA_RESPONSE[] =
1299 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1300 "Proxy-Agent: Privoxy " VERSION "\r\n"
1301 "Content-Type: text/plain\r\n"
1302 "Connection: close\r\n\r\n"
1303 "Empty server or forwarder response.\r\n"
1304 "The connection has been closed but Privoxy didn't receive any data.\r\n";
1306 /* XXX: should be a template */
1307 static const char INVALID_SERVER_HEADERS_RESPONSE[] =
1308 "HTTP/1.0 502 Server or forwarder response invalid\r\n"
1309 "Proxy-Agent: Privoxy " VERSION "\r\n"
1310 "Content-Type: text/plain\r\n"
1311 "Connection: close\r\n\r\n"
1312 "Bad response. The server or forwarder response doesn't look like HTTP.\r\n";
1315 /* XXX: should be a template */
1316 static const char NULL_BYTE_RESPONSE[] =
1317 "HTTP/1.0 400 Bad request received from client\r\n"
1318 "Proxy-Agent: Privoxy " VERSION "\r\n"
1319 "Content-Type: text/plain\r\n"
1320 "Connection: close\r\n\r\n"
1321 "Bad request. Null byte(s) before end of request.\r\n";
1324 /* XXX: should be a template */
1325 static const char MESSED_UP_REQUEST_RESPONSE[] =
1326 "HTTP/1.0 400 Malformed request after rewriting\r\n"
1327 "Proxy-Agent: Privoxy " VERSION "\r\n"
1328 "Content-Type: text/plain\r\n"
1329 "Connection: close\r\n\r\n"
1330 "Bad request. Messed up with header filters.\r\n";
1332 /* A function to crunch a response */
1333 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
1335 /* Crunch function flags */
1336 #define CF_NO_FLAGS 0
1337 /* Cruncher applies to forced requests as well */
1338 #define CF_IGNORE_FORCE 1
1339 /* Crunched requests are counted for the block statistics */
1340 #define CF_COUNT_AS_REJECT 2
1342 /* A crunch function and its flags */
1345 const crunch_func_ptr cruncher;
1349 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
1351 /* Complete list of cruncher functions */
1352 static const struct cruncher crunchers_all[] = {
1353 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
1354 { block_url, CF_COUNT_AS_REJECT },
1355 #ifdef FEATURE_TRUST
1356 { trust_url, CF_COUNT_AS_REJECT },
1357 #endif /* def FEATURE_TRUST */
1358 { redirect_url, CF_NO_FLAGS },
1359 { dispatch_cgi, CF_IGNORE_FORCE},
1363 /* Light version, used after tags are applied */
1364 static const struct cruncher crunchers_light[] = {
1365 { block_url, CF_COUNT_AS_REJECT },
1366 { redirect_url, CF_NO_FLAGS },
1372 * XXX: Don't we really mean
1378 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1379 /*********************************************************************
1381 * Function : sig_handler
1383 * Description : Signal handler for different signals.
1384 * Exit gracefully on TERM and INT
1385 * or set a flag that will cause the errlog
1386 * to be reopened by the main thread on HUP.
1389 * 1 : the_signal = the signal cause this function to call
1393 *********************************************************************/
1394 static void sig_handler(int the_signal)
1400 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1412 received_hup_signal = 1;
1418 * We shouldn't be here, unless we catch signals
1419 * in main() that we can't handle here!
1421 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1429 /*********************************************************************
1431 * Function : client_protocol_is_unsupported
1433 * Description : Checks if the client used a known unsupported
1434 * protocol and deals with it by sending an error
1438 * 1 : csp = Current client state (buffers, headers, etc...)
1439 * 2 : req = the first request line send by the client
1441 * Returns : TRUE if an error response has been generated, or
1442 * FALSE if the request doesn't look invalid.
1444 *********************************************************************/
1445 static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1448 * If it's a FTP or gopher request, we don't support it.
1450 * These checks are better than nothing, but they might
1451 * not work in all configurations and some clients might
1452 * have problems digesting the answer.
1454 * They should, however, never cause more problems than
1455 * Privoxy's old behaviour (returning the misleading HTML
1458 * "Could not resolve http://(ftp|gopher)://example.org").
1460 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1462 const char *response = NULL;
1463 const char *protocol = NULL;
1465 if (!strncmpic(req, "GET ftp://", 10))
1467 response = FTP_RESPONSE;
1472 response = GOPHER_RESPONSE;
1473 protocol = "GOPHER";
1475 log_error(LOG_LEVEL_ERROR,
1476 "%s tried to use Privoxy as %s proxy: %s",
1477 csp->ip_addr_str, protocol, req);
1478 log_error(LOG_LEVEL_CLF,
1479 "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1481 write_socket(csp->cfd, response, strlen(response));
1490 /*********************************************************************
1492 * Function : get_request_destination_elsewhere
1494 * Description : If the client's request was redirected into
1495 * Privoxy without the client's knowledge,
1496 * the request line lacks the destination host.
1498 * This function tries to get it elsewhere,
1499 * provided accept-intercepted-requests is enabled.
1501 * "Elsewhere" currently only means "Host: header",
1502 * but in the future we may ask the redirecting
1503 * packet filter to look the destination up.
1505 * If the destination stays unknown, an error
1506 * response is send to the client and headers
1507 * are freed so that chat() can return directly.
1510 * 1 : csp = Current client state (buffers, headers, etc...)
1511 * 2 : headers = a header list
1513 * Returns : JB_ERR_OK if the destination is now known, or
1514 * JB_ERR_PARSE if it isn't.
1516 *********************************************************************/
1517 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1521 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1523 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1524 " Privoxy isn't configured to accept intercepted requests.",
1525 csp->ip_addr_str, csp->http->cmd);
1526 /* XXX: Use correct size */
1527 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1528 csp->ip_addr_str, csp->http->cmd);
1530 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1531 destroy_list(headers);
1533 return JB_ERR_PARSE;
1535 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1537 /* Split the domain we just got for pattern matching */
1538 init_domain_components(csp->http);
1544 /* We can't work without destination. Go spread the news.*/
1546 req = list_to_text(headers);
1548 /* XXX: Use correct size */
1549 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1550 csp->ip_addr_str, csp->http->cmd);
1551 log_error(LOG_LEVEL_ERROR,
1552 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1553 csp->ip_addr_str, csp->http->cmd, req);
1556 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
1557 destroy_list(headers);
1559 return JB_ERR_PARSE;
1562 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1563 * to get the destination IP address, use it as host directly
1564 * or do a reverse DNS lookup first.
1569 /*********************************************************************
1571 * Function : get_server_headers
1573 * Description : Parses server headers in iob and fills them
1574 * into csp->headers so that they can later be
1578 * 1 : csp = Current client state (buffers, headers, etc...)
1580 * Returns : JB_ERR_OK if everything went fine, or
1581 * JB_ERR_PARSE if the headers were incomplete.
1583 *********************************************************************/
1584 static jb_err get_server_headers(struct client_state *csp)
1586 int continue_hack_in_da_house = 0;
1589 while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
1594 * continue hack in da house. Ignore the ending of
1595 * this head and continue enlisting header lines.
1596 * The reason is described below.
1598 enlist(csp->headers, "");
1599 continue_hack_in_da_house = 0;
1602 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1605 * It's a bodyless continue response, don't
1606 * stop header parsing after reaching its end.
1608 * As a result Privoxy will concatenate the
1609 * next response's head and parse and deliver
1610 * the headers as if they belonged to one request.
1612 * The client will separate them because of the
1613 * empty line between them.
1615 * XXX: What we're doing here is clearly against
1616 * the intended purpose of the continue header,
1617 * and under some conditions (HTTP/1.0 client request)
1618 * it's a standard violation.
1620 * Anyway, "sort of against the spec" is preferable
1621 * to "always getting confused by Continue responses"
1622 * (Privoxy's behaviour before this hack was added)
1624 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1625 continue_hack_in_da_house = 1;
1627 else if (*header == '\0')
1630 * If the header is empty, but the Continue hack
1631 * isn't active, we can assume that we reached the
1632 * end of the buffer before we hit the end of the
1635 * Inform the caller an let it decide how to handle it.
1637 return JB_ERR_PARSE;
1640 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1643 * XXX: Should we quit the request and return a
1644 * out of memory error page instead?
1646 log_error(LOG_LEVEL_ERROR,
1647 "Out of memory while enlisting server headers. %s lost.",
1657 /*********************************************************************
1659 * Function : crunch_reason
1661 * Description : Translates the crunch reason code into a string.
1664 * 1 : rsp = a http_response
1666 * Returns : A string with the crunch reason or an error description.
1668 *********************************************************************/
1669 static const char *crunch_reason(const struct http_response *rsp)
1671 char * reason = NULL;
1673 assert(rsp != NULL);
1676 return "Internal error while searching for crunch reason";
1679 switch (rsp->reason)
1681 case RSP_REASON_UNSUPPORTED:
1682 reason = "Unsupported HTTP feature";
1684 case RSP_REASON_BLOCKED:
1687 case RSP_REASON_UNTRUSTED:
1688 reason = "Untrusted";
1690 case RSP_REASON_REDIRECTED:
1691 reason = "Redirected";
1693 case RSP_REASON_CGI_CALL:
1694 reason = "CGI Call";
1696 case RSP_REASON_NO_SUCH_DOMAIN:
1697 reason = "DNS failure";
1699 case RSP_REASON_FORWARDING_FAILED:
1700 reason = "Forwarding failed";
1702 case RSP_REASON_CONNECT_FAILED:
1703 reason = "Connection failure";
1705 case RSP_REASON_OUT_OF_MEMORY:
1706 reason = "Out of memory (may mask other reasons)";
1709 reason = "No reason recorded";
1717 /*********************************************************************
1719 * Function : send_crunch_response
1721 * Description : Delivers already prepared response for
1722 * intercepted requests, logs the interception
1723 * and frees the response.
1726 * 1 : csp = Current client state (buffers, headers, etc...)
1727 * 1 : rsp = Fully prepared response. Will be freed on exit.
1729 * Returns : Nothing.
1731 *********************************************************************/
1732 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp)
1734 const struct http_request *http = csp->http;
1735 char status_code[4];
1737 assert(rsp != NULL);
1738 assert(rsp->head != NULL);
1743 * Not supposed to happen. If it does
1744 * anyway, treat it as an unknown error.
1746 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1747 /* return code doesn't matter */
1752 /* If rsp is still NULL, we have serious internal problems. */
1753 log_error(LOG_LEVEL_FATAL,
1754 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1758 * Extract the status code from the actual head
1759 * that was send to the client. It is the only
1760 * way to get it right for all requests, including
1761 * the fixed ones for out-of-memory problems.
1763 * A head starts like this: 'HTTP/1.1 200...'
1767 status_code[0] = rsp->head[9];
1768 status_code[1] = rsp->head[10];
1769 status_code[2] = rsp->head[11];
1770 status_code[3] = '\0';
1772 /* Write the answer to the client */
1773 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1774 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1776 /* There is nothing we can do about it. */
1777 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1780 /* Log that the request was crunched and why. */
1781 log_error(LOG_LEVEL_GPC, "%s%s crunch! (%s)",
1782 http->hostport, http->path, crunch_reason(rsp));
1783 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %d",
1784 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1786 /* Clean up and return */
1787 if (cgi_error_memory() != rsp)
1789 free_http_response(rsp);
1796 /*********************************************************************
1798 * Function : request_contains_null_bytes
1800 * Description : Checks for NULL bytes in the request and sends
1801 * an error message to the client if any were found.
1803 * XXX: currently not used, see comment in chat().
1806 * 1 : csp = Current client state (buffers, headers, etc...)
1807 * 2 : buf = Data from the client's request to check.
1808 * 3 : len = The data length.
1810 * Returns : TRUE if the request contained one or more NULL bytes, or
1813 *********************************************************************/
1814 static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1816 size_t c_len; /* Request lenght when treated as C string */
1818 c_len = strlen(buf);
1823 * Null byte(s) found. Log the request,
1824 * return an error response and hang up.
1826 size_t tmp_len = c_len;
1831 * Replace NULL byte(s) with '°' characters
1832 * so the request can be logged as string.
1833 * XXX: Is there a better replacement character?
1836 tmp_len += strlen(buf+tmp_len);
1837 } while (tmp_len < len);
1839 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1840 "(length=%d, strlen=%d).", csp->ip_addr_str, len, c_len);
1841 log_error(LOG_LEVEL_HEADER,
1842 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1844 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
1846 /* XXX: Log correct size */
1847 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1857 /*********************************************************************
1859 * Function : crunch_response_triggered
1861 * Description : Checks if the request has to be crunched,
1862 * and delivers the crunch response if necessary.
1865 * 1 : csp = Current client state (buffers, headers, etc...)
1866 * 2 : crunchers = list of cruncher functions to run
1868 * Returns : TRUE if the request was answered with a crunch response
1871 *********************************************************************/
1872 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
1874 struct http_response *rsp = NULL;
1875 const struct cruncher *c;
1878 * If CGI request crunching is disabled,
1879 * check the CGI dispatcher out of order to
1880 * prevent unintentional blocks or redirects.
1882 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
1883 && (NULL != (rsp = dispatch_cgi(csp))))
1885 /* Deliver, log and free the interception response. */
1886 send_crunch_response(csp, rsp);
1890 for (c = crunchers; c->cruncher != NULL; c++)
1893 * Check the cruncher if either Privoxy is toggled
1894 * on and the request isn't forced, or if the cruncher
1895 * applies to forced requests as well.
1897 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
1898 !(csp->flags & CSP_FLAG_FORCED)) ||
1899 (c->flags & CF_IGNORE_FORCE))
1901 rsp = c->cruncher(csp);
1904 /* Deliver, log and free the interception response. */
1905 send_crunch_response(csp, rsp);
1906 #ifdef FEATURE_STATISTICS
1907 if (c->flags & CF_COUNT_AS_REJECT)
1909 csp->flags |= CSP_FLAG_REJECTED;
1911 #endif /* def FEATURE_STATISTICS */
1922 /*********************************************************************
1924 * Function : build_request_line
1926 * Description : Builds the HTTP request line.
1928 * If a HTTP forwarder is used it expects the whole URL,
1929 * web servers only get the path.
1932 * 1 : csp = Current client state (buffers, headers, etc...)
1933 * 2 : fwd = The forwarding spec used for the request
1934 * XXX: Should use http->fwd instead.
1935 * 3 : request_line = The old request line which will be replaced.
1937 * Returns : Nothing. Terminates in case of memory problems.
1939 *********************************************************************/
1940 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
1942 struct http_request *http = csp->http;
1944 assert(http->ssl == 0);
1947 * Downgrade http version from 1.1 to 1.0
1948 * if +downgrade action applies.
1950 if ( (csp->action->flags & ACTION_DOWNGRADE)
1951 && (!strcmpic(http->ver, "HTTP/1.1")))
1954 http->ver = strdup("HTTP/1.0");
1956 if (http->ver == NULL)
1958 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1963 * Rebuild the request line.
1965 freez(*request_line);
1966 *request_line = strdup(http->gpc);
1967 string_append(request_line, " ");
1969 if (fwd->forward_host)
1971 string_append(request_line, http->url);
1975 string_append(request_line, http->path);
1977 string_append(request_line, " ");
1978 string_append(request_line, http->ver);
1980 if (*request_line == NULL)
1982 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1984 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
1988 /*********************************************************************
1990 * Function : change_request_destination
1992 * Description : Parse a (rewritten) request line and regenerate
1993 * the http request data.
1996 * 1 : csp = Current client state (buffers, headers, etc...)
1998 * Returns : Forwards the parse_http_request() return code.
1999 * Terminates in case of memory problems.
2001 *********************************************************************/
2002 static jb_err change_request_destination(struct client_state *csp)
2004 struct http_request *http = csp->http;
2007 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
2008 free_http_request(http);
2009 err = parse_http_request(csp->headers->first->str, http, csp);
2010 if (JB_ERR_OK != err)
2012 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
2013 jb_err_to_string(err));
2017 /* XXX: ocmd is a misleading name */
2018 http->ocmd = strdup(http->cmd);
2019 if (http->ocmd == NULL)
2021 log_error(LOG_LEVEL_FATAL,
2022 "Out of memory copying rewritten HTTP request line");
2030 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2031 /*********************************************************************
2033 * Function : server_response_is_complete
2035 * Description : Determines whether we should stop reading
2036 * from the server socket.
2039 * 1 : csp = Current client state (buffers, headers, etc...)
2040 * 2 : content_length = Length of content received so far.
2042 * Returns : TRUE if the response is complete,
2045 *********************************************************************/
2046 static int server_response_is_complete(struct client_state *csp, size_t content_length)
2048 int content_length_known = (csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
2050 if (!strcmpic(csp->http->gpc, "HEAD"))
2053 * "HEAD" implies no body, we are thus expecting
2054 * no content. XXX: incomplete "list" of methods?
2056 csp->expected_content_length = 0;
2057 content_length_known = TRUE;
2060 if (csp->http->status == 304)
2063 * Expect no body. XXX: incomplete "list" of status codes?
2065 csp->expected_content_length = 0;
2066 content_length_known = TRUE;
2069 return (content_length_known && ((0 == csp->expected_content_length)
2070 || (csp->expected_content_length <= content_length)));
2072 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2074 /*********************************************************************
2076 * Function : mark_server_socket_tainted
2078 * Description : Makes sure we don't reuse a server socket
2079 * (if we didn't read everything the server sent
2080 * us reusing the socket would lead to garbage).
2083 * 1 : csp = Current client state (buffers, headers, etc...)
2087 *********************************************************************/
2088 static void mark_server_socket_tainted(struct client_state *csp)
2090 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
2092 log_error(LOG_LEVEL_CONNECT, "Unsetting keep-alive flag.");
2093 csp->flags &= ~CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE;
2097 /*********************************************************************
2101 * Description : Once a connection to the client has been accepted,
2102 * this function is called (via serve()) to handle the
2103 * main business of the communication. When this
2104 * function returns, the caller must close the client
2107 * FIXME: chat is nearly thousand lines long.
2111 * 1 : csp = Current client state (buffers, headers, etc...)
2113 * Returns : Nothing.
2115 *********************************************************************/
2116 static void chat(struct client_state *csp)
2118 char buf[BUFFER_SIZE];
2126 int ms_iis5_hack = 0;
2127 size_t byte_count = 0;
2128 int forwarded_connect_retries = 0;
2129 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
2130 const struct forward_spec * fwd;
2131 struct http_request *http;
2132 int len; /* for buffer sizes (and negative error codes) */
2135 /* Function that does the content filtering for the current request */
2136 filter_function_ptr content_filter = NULL;
2138 /* Skeleton for HTTP response, if we should intercept the request */
2139 struct http_response *rsp;
2141 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
2142 struct list header_list;
2143 struct list *headers = &header_list;
2147 memset(buf, 0, sizeof(buf));
2150 * Read the client's request. Note that since we're not using select() we
2151 * could get blocked here if a client connected, then didn't say anything!
2156 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2158 if (len <= 0) break; /* error! */
2161 * If there is no memory left for buffering the
2162 * request, there is nothing we can do but hang up
2164 if (add_to_iob(csp, buf, len))
2169 req = get_header(csp->iob);
2171 } while ((NULL != req) && ('\0' == *req));
2173 if ((NULL != req) && ('\0' != *req))
2175 /* Request received. Validate and parse it. */
2179 * XXX: Temporary disabled to prevent problems
2180 * with POST requests whose bodies are allowed to
2181 * contain NULL bytes. BR#1730105.
2183 * The main purpose of this check is to properly
2184 * log stuff like BitTorrent traffic and other junk
2185 * that hits public proxies. It's not required for
2186 * Privoxy to functions as those requests are discarded
2189 * It probably should be rewritten to only check
2190 * the head of the request. Another option would
2191 * be to let all POST requests pass, although that
2192 * may not be good enough.
2194 if (request_contains_null_bytes(csp, buf, len))
2196 /* NULL bytes found and dealt with, just hang up. */
2201 /* Does the request line look invalid? */
2202 if (client_protocol_is_unsupported(csp, req))
2205 * Yes. The request has already been
2206 * answered with a error response, the buffers
2207 * were freed and we're done with chatting.
2212 #ifdef FEATURE_FORCE_LOAD
2214 * If this request contains the FORCE_PREFIX and blocks
2215 * aren't enforced, get rid of it and set the force flag.
2217 if (strstr(req, FORCE_PREFIX))
2219 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
2221 log_error(LOG_LEVEL_FORCE,
2222 "Ignored force prefix in request: \"%s\".", req);
2226 strclean(req, FORCE_PREFIX);
2227 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
2228 csp->flags |= CSP_FLAG_FORCED;
2232 #endif /* def FEATURE_FORCE_LOAD */
2233 err = parse_http_request(req, http, csp);
2234 if (JB_ERR_OK != err)
2236 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", jb_err_to_string(err));
2242 if (http->cmd == NULL)
2244 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
2245 /* XXX: Use correct size */
2246 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2247 log_error(LOG_LEVEL_ERROR, "Invalid header received from %s.", csp->ip_addr_str);
2249 free_http_request(http);
2253 /* grab the rest of the client's headers */
2257 p = get_header(csp->iob);
2261 /* There are no additional headers to read. */
2268 * We didn't receive a complete header
2269 * line yet, get the rest of it.
2271 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2274 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
2275 destroy_list(headers);
2279 if (add_to_iob(csp, buf, len))
2282 * If there is no memory left for buffering the
2283 * request, there is nothing we can do but hang up
2285 destroy_list(headers);
2292 * We were able to read a complete
2293 * header and can finaly enlist it.
2300 if (http->host == NULL)
2303 * If we still don't know the request destination,
2304 * the request is invalid or the client uses
2305 * Privoxy without its knowledge.
2307 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
2310 * Our attempts to get the request destination
2311 * elsewhere failed or Privoxy is configured
2312 * to only accept proxy requests.
2314 * An error response has already been send
2315 * and we're done here.
2322 * Determine the actions for this URL
2324 #ifdef FEATURE_TOGGLE
2325 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
2327 /* Most compatible set of actions (i.e. none) */
2328 init_current_action(csp->action);
2331 #endif /* ndef FEATURE_TOGGLE */
2333 get_url_actions(csp, http);
2337 * Save a copy of the original request for logging
2339 http->ocmd = strdup(http->cmd);
2341 if (http->ocmd == NULL)
2343 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
2346 enlist(csp->headers, http->cmd);
2348 /* Append the previously read headers */
2349 list_append_list_unique(csp->headers, headers);
2350 destroy_list(headers);
2352 err = sed(csp, FILTER_CLIENT_HEADERS);
2353 if (JB_ERR_OK != err)
2355 assert(err == JB_ERR_PARSE);
2356 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers");
2358 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2360 /* Check request line for rewrites. */
2361 if ((NULL == csp->headers->first->str)
2362 || (strcmp(http->cmd, csp->headers->first->str) &&
2363 (JB_ERR_OK != change_request_destination(csp))))
2366 * A header filter broke the request line - bail out.
2368 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
2369 /* XXX: Use correct size */
2370 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
2371 log_error(LOG_LEVEL_ERROR, "Invalid request line after applying header filters.");
2373 free_http_request(http);
2377 /* decide how to route the HTTP request */
2378 fwd = forward_url(csp, http);
2381 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
2382 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2386 * build the http request to send to the server
2387 * we have to do one of the following:
2389 * create = use the original HTTP request to create a new
2390 * HTTP request that has either the path component
2391 * without the http://domainspec (w/path) or the
2392 * full orininal URL (w/url)
2393 * Note that the path and/or the HTTP version may
2394 * have been altered by now.
2396 * connect = Open a socket to the host:port of the server
2397 * and short-circuit server and client socket.
2399 * pass = Pass the request unchanged if forwarding a CONNECT
2400 * request to a parent proxy. Note that we'll be sending
2401 * the CFAIL message ourselves if connecting to the parent
2402 * fails, but we won't send a CSUCCEED message if it works,
2403 * since that would result in a double message (ours and the
2404 * parent's). After sending the request to the parent, we simply
2407 * here's the matrix:
2410 * +--------+--------+
2412 * 0 | create | connect|
2414 * Forwarding +--------+--------+
2416 * 1 | create | pass |
2418 * +--------+--------+
2422 if (http->ssl && connect_port_is_forbidden(csp))
2424 const char *acceptable_connect_ports =
2425 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
2426 assert(NULL != acceptable_connect_ports);
2427 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
2428 "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
2429 csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
2430 csp->action->flags |= ACTION_BLOCK;
2436 freez(csp->headers->first->str);
2437 build_request_line(csp, fwd, &csp->headers->first->str);
2440 hdr = list_to_text(csp->headers);
2443 /* FIXME Should handle error properly */
2444 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2448 * We have a request. Check if one of the crunchers wants it.
2450 if (crunch_response_triggered(csp, crunchers_all))
2453 * Yes. The client got the crunch response
2454 * and we are done here after cleaning up.
2457 list_remove_all(csp->headers);
2463 * The headers can't be removed earlier because
2464 * they were still needed for the referrer check
2465 * in case of CGI crunches.
2467 * XXX: Would it be worth to move the referrer check
2468 * into client_referrer() and set a flag if it's trusted?
2470 list_remove_all(csp->headers);
2472 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2474 if (fwd->forward_host)
2476 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2477 fwd->forward_host, fwd->forward_port, http->hostport);
2481 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2484 /* here we connect to the server, gateway, or the forwarder */
2486 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
2487 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2489 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
2490 forwarded_connect_retries, http->hostport);
2493 if (csp->sfd == JB_INVALID_SOCKET)
2495 if (fwd->type != SOCKS_NONE)
2498 rsp = error_response(csp, "forwarding-failed", errno);
2500 else if (errno == EINVAL)
2502 rsp = error_response(csp, "no-such-domain", errno);
2506 rsp = error_response(csp, "connect-failed", errno);
2507 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2511 /* Write the answer to the client */
2514 send_crunch_response(csp, rsp);
2521 if (fwd->forward_host || (http->ssl == 0))
2524 * Write the client's (modified) header to the server
2525 * (along with anything else that may be in the buffer)
2527 if (write_socket(csp->sfd, hdr, strlen(hdr))
2528 || (flush_socket(csp->sfd, csp->iob) < 0))
2530 log_error(LOG_LEVEL_CONNECT,
2531 "write header to: %s failed: %E", http->hostport);
2533 rsp = error_response(csp, "connect-failed", errno);
2536 send_crunch_response(csp, rsp);
2546 * We're running an SSL tunnel and we're not forwarding,
2547 * so just send the "connect succeeded" message to the
2548 * client, flush the rest, and get out of the way.
2550 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
2558 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2560 /* we're finished with the client's header */
2563 maxfd = (csp->cfd > csp->sfd) ? csp->cfd : csp->sfd;
2565 /* pass data between the client and server
2566 * until one or the other shuts down the connection.
2575 * FD_ZERO here seems to point to an errant macro which crashes.
2576 * So do this by hand for now...
2578 memset(&rfds,0x00,sizeof(fd_set));
2582 FD_SET(csp->cfd, &rfds);
2583 FD_SET(csp->sfd, &rfds);
2585 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2586 if (server_body && server_response_is_complete(csp, byte_count))
2588 log_error(LOG_LEVEL_CONNECT,
2589 "Done reading from server. Expected content length: %d. "
2590 "Actual content length: %d. Most recently received: %d.",
2591 csp->expected_content_length, byte_count, len);
2594 * XXX: should not jump around,
2595 * chat() is complicated enough already.
2599 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2601 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
2605 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2606 mark_server_socket_tainted(csp);
2611 * This is the body of the browser's request,
2612 * just read and write it.
2614 if (FD_ISSET(csp->cfd, &rfds))
2616 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2620 /* XXX: not sure if this is necessary. */
2621 mark_server_socket_tainted(csp);
2622 break; /* "game over, man" */
2625 if (write_socket(csp->sfd, buf, (size_t)len))
2627 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2628 mark_server_socket_tainted(csp);
2635 * The server wants to talk. It could be the header or the body.
2636 * If `hdr' is null, then it's the header otherwise it's the body.
2637 * FIXME: Does `hdr' really mean `host'? No.
2639 if (FD_ISSET(csp->sfd, &rfds))
2642 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2646 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2648 if (http->ssl && (fwd->forward_host == NULL))
2651 * Just hang up. We already confirmed the client's CONNECT
2652 * request with status code 200 and unencrypted content is
2653 * no longer welcome.
2655 log_error(LOG_LEVEL_ERROR,
2656 "CONNECT already confirmed. Unable to tell the client about the problem.");
2659 else if (byte_count)
2662 * Just hang up. We already transmitted the original headers
2663 * and parts of the original content and therefore missed the
2664 * chance to send an error message (without risking data corruption).
2666 * XXX: we could retry with a fancy range request here.
2668 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2669 "Unable to tell the client about the problem.");
2670 mark_server_socket_tainted(csp);
2674 rsp = error_response(csp, "connect-failed", errno);
2677 send_crunch_response(csp, rsp);
2683 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2684 if (csp->flags & CSP_FLAG_CHUNKED)
2686 if ((len > 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2688 /* XXX: this is a temporary hack */
2689 log_error(LOG_LEVEL_CONNECT,
2690 "Looks like we reached the end of the last chunk. "
2691 "We better stop reading.");
2692 csp->expected_content_length = byte_count + (size_t)len;
2693 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2697 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2700 * Add a trailing zero to let be able to use string operations.
2701 * XXX: do we still need this with filter_popups gone?
2706 * Normally, this would indicate that we've read
2707 * as much as the server has sent us and we can
2708 * close the client connection. However, Microsoft
2709 * in its wisdom has released IIS/5 with a bug that
2710 * prevents it from sending the trailing \r\n in
2711 * a 302 redirect header (and possibly other headers).
2712 * To work around this if we've haven't parsed
2713 * a full header we'll append a trailing \r\n
2714 * and see if this now generates a valid one.
2716 * This hack shouldn't have any impacts. If we've
2717 * already transmitted the header or if this is a
2718 * SSL connection, then we won't bother with this
2719 * hack. So we only work on partially received
2720 * headers. If we append a \r\n and this still
2721 * doesn't generate a valid header, then we won't
2722 * transmit anything to the client.
2727 if (server_body || http->ssl)
2730 * If we have been buffering up the document,
2731 * now is the time to apply content modification
2732 * and send the result to the client.
2736 p = execute_content_filter(csp, content_filter);
2738 * If the content filter fails, use the original
2739 * buffer and length.
2740 * (see p != NULL ? p : csp->iob->cur below)
2744 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2747 if (JB_ERR_OK != update_server_headers(csp))
2749 log_error(LOG_LEVEL_FATAL,
2750 "Failed to update server headers. after filtering.");
2753 hdr = list_to_text(csp->headers);
2756 /* FIXME Should handle error properly */
2757 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2760 if (write_socket(csp->cfd, hdr, strlen(hdr))
2761 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
2763 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2766 mark_server_socket_tainted(csp);
2774 break; /* "game over, man" */
2778 * This is NOT the body, so
2779 * Let's pretend the server just sent us a blank line.
2781 snprintf(buf, sizeof(buf), "\r\n");
2782 len = (int)strlen(buf);
2785 * Now, let the normal header parsing algorithm below do its
2786 * job. If it fails, we'll exit instead of continuing.
2793 * If this is an SSL connection or we're in the body
2794 * of the server document, just write it to the client,
2795 * unless we need to buffer the body for later content-filtering
2797 if (server_body || http->ssl)
2802 * If there is no memory left for buffering the content, or the buffer limit
2803 * has been reached, switch to non-filtering mode, i.e. make & write the
2804 * header, flush the iob and buf, and get out of the way.
2806 if (add_to_iob(csp, buf, len))
2811 log_error(LOG_LEVEL_INFO,
2812 "Flushing header and buffers. Stepping back from filtering.");
2814 hdr = list_to_text(csp->headers);
2818 * Memory is too tight to even generate the header.
2819 * Send our static "Out-of-memory" page.
2821 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2822 rsp = cgi_error_memory();
2823 send_crunch_response(csp, rsp);
2824 mark_server_socket_tainted(csp);
2827 hdrlen = strlen(hdr);
2829 if (write_socket(csp->cfd, hdr, hdrlen)
2830 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
2831 || (write_socket(csp->cfd, buf, (size_t)len)))
2833 log_error(LOG_LEVEL_CONNECT,
2834 "Flush header and buffers to client failed: %E");
2836 mark_server_socket_tainted(csp);
2841 * Reset the byte_count to the amount of bytes
2842 * we just flushed. len will be added a few lines below,
2843 * hdrlen doesn't matter for LOG_LEVEL_CLF.
2845 byte_count = (size_t)flushed;
2847 content_filter = NULL;
2853 if (write_socket(csp->cfd, buf, (size_t)len))
2855 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2856 mark_server_socket_tainted(csp);
2860 byte_count += (size_t)len;
2865 const char *header_start;
2867 * We're still looking for the end of the server's header.
2868 * Buffer up the data we just read. If that fails, there's
2869 * little we can do but send our static out-of-memory page.
2871 if (add_to_iob(csp, buf, len))
2873 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2874 rsp = cgi_error_memory();
2875 send_crunch_response(csp, rsp);
2876 mark_server_socket_tainted(csp);
2880 header_start = csp->iob->cur;
2882 /* Convert iob into something sed() can digest */
2883 if (JB_ERR_PARSE == get_server_headers(csp))
2888 * Well, we tried our MS IIS/5 hack and it didn't work.
2889 * The header is incomplete and there isn't anything
2890 * we can do about it.
2892 log_error(LOG_LEVEL_INFO,
2893 "MS IIS5 hack didn't produce valid headers.");
2899 * Since we have to wait for more from the server before
2900 * we can parse the headers we just continue here.
2906 /* Did we actually get anything? */
2907 if (NULL == csp->headers->first)
2909 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
2910 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2911 write_socket(csp->cfd, NO_SERVER_DATA_RESPONSE, strlen(NO_SERVER_DATA_RESPONSE));
2912 free_http_request(http);
2913 mark_server_socket_tainted(csp);
2917 assert(csp->headers->first->str);
2919 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
2920 strncmpic(csp->headers->first->str, "ICY", 3))
2923 * It doesn't look like a HTTP (or Shoutcast) response:
2924 * tell the client and log the problem.
2926 if (strlen(csp->headers->first->str) > 30)
2928 csp->headers->first->str[30] = '\0';
2930 log_error(LOG_LEVEL_ERROR,
2931 "Invalid server or forwarder response. Starts with: %s",
2932 csp->headers->first->str);
2933 log_error(LOG_LEVEL_CLF,
2934 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2935 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2936 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2937 free_http_request(http);
2938 mark_server_socket_tainted(csp);
2943 * We have now received the entire server header,
2944 * filter it and send the result to the client
2946 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
2948 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
2950 hdr = list_to_text(csp->headers);
2953 /* FIXME Should handle error properly */
2954 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2957 if (crunch_response_triggered(csp, crunchers_light))
2960 * One of the tags created by a server-header
2961 * tagger triggered a crunch. We already
2962 * delivered the crunch response to the client
2963 * and are done here after cleaning up.
2966 mark_server_socket_tainted(csp);
2969 /* Buffer and pcrs filter this if appropriate. */
2971 if (!http->ssl) /* We talk plaintext */
2973 content_filter = get_filter_function(csp);
2976 * Only write if we're not buffering for content modification
2978 if (!content_filter)
2981 * Write the server's (modified) header to
2982 * the client (along with anything else that
2983 * may be in the buffer)
2986 if (write_socket(csp->cfd, hdr, strlen(hdr))
2987 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
2989 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
2992 * The write failed, so don't bother mentioning it
2993 * to the client... it probably can't hear us anyway.
2996 mark_server_socket_tainted(csp);
3000 byte_count += (size_t)len;
3005 * XXX: the header lenght should probably
3006 * be calculated by get_server_headers().
3008 int header_length = csp->iob->cur - header_start;
3009 assert(csp->iob->cur > header_start);
3010 byte_count += (size_t)(len - header_length);
3013 /* we're finished with the server's header */
3019 * If this was a MS IIS/5 hack then it means the server
3020 * has already closed the connection. Nothing more to read.
3025 log_error(LOG_LEVEL_INFO,
3026 "Closed server connection detected with MS IIS5 hack enabled.");
3032 mark_server_socket_tainted(csp);
3033 return; /* huh? we should never get here */
3036 if (csp->content_length == 0)
3039 * If Privoxy didn't recalculate the Content-Lenght,
3040 * byte_count is still correct.
3042 csp->content_length = byte_count;
3045 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3046 && (csp->expected_content_length != byte_count))
3048 log_error(LOG_LEVEL_ERROR,
3049 "Received %d bytes while expecting %d.",
3050 byte_count, csp->expected_content_length);
3051 mark_server_socket_tainted(csp);
3054 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
3055 csp->ip_addr_str, http->ocmd, csp->content_length);
3059 /*********************************************************************
3063 * Description : This is little more than chat. We only "serve" to
3064 * to close any socket that chat may have opened.
3067 * 1 : csp = Current client state (buffers, headers, etc...)
3071 *********************************************************************/
3073 void serve(struct client_state *csp)
3074 #else /* ifndef AMIGA */
3075 static void serve(struct client_state *csp)
3076 #endif /* def AMIGA */
3079 close_socket(csp->cfd);
3081 if (csp->sfd != JB_INVALID_SOCKET)
3083 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3084 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
3086 remember_connection(csp->sfd, csp->http, forward_url(csp, csp->http));
3090 forget_connection(csp->sfd);
3091 close_socket(csp->sfd);
3094 close_socket(csp->sfd);
3095 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3098 csp->flags &= ~CSP_FLAG_ACTIVE;
3104 /*********************************************************************
3106 * Function : server_thread
3108 * Description : We only exist to call `serve' in a threaded environment.
3111 * 1 : data = Current client state (buffers, headers, etc...)
3113 * Returns : Always 0.
3115 *********************************************************************/
3116 static int32 server_thread(void *data)
3118 serve((struct client_state *) data);
3125 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3126 /*********************************************************************
3130 * Description : Print usage info & exit.
3132 * Parameters : Pointer to argv[0] for identifying ourselves
3136 *********************************************************************/
3137 static void usage(const char *myname)
3139 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
3143 #endif /* defined(unix) */
3146 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
3147 #endif /* defined(unix) */
3148 "[--version] [configfile]\n"
3149 "Aborting\n", myname);
3154 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
3157 #ifdef MUTEX_LOCKS_AVAILABLE
3158 /*********************************************************************
3160 * Function : privoxy_mutex_lock
3162 * Description : Locks a mutex.
3165 * 1 : mutex = The mutex to lock.
3167 * Returns : Void. May exit in case of errors.
3169 *********************************************************************/
3170 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
3172 #ifdef FEATURE_PTHREAD
3173 int err = pthread_mutex_lock(mutex);
3176 if (mutex != &log_mutex)
3178 log_error(LOG_LEVEL_FATAL,
3179 "Mutex locking failed: %s.\n", strerror(err));
3184 EnterCriticalSection(mutex);
3185 #endif /* def FEATURE_PTHREAD */
3189 /*********************************************************************
3191 * Function : privoxy_mutex_unlock
3193 * Description : Unlocks a mutex.
3196 * 1 : mutex = The mutex to unlock.
3198 * Returns : Void. May exit in case of errors.
3200 *********************************************************************/
3201 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
3203 #ifdef FEATURE_PTHREAD
3204 int err = pthread_mutex_unlock(mutex);
3207 if (mutex != &log_mutex)
3209 log_error(LOG_LEVEL_FATAL,
3210 "Mutex unlocking failed: %s.\n", strerror(err));
3215 LeaveCriticalSection(mutex);
3216 #endif /* def FEATURE_PTHREAD */
3220 /*********************************************************************
3222 * Function : privoxy_mutex_init
3224 * Description : Prepares a mutex.
3227 * 1 : mutex = The mutex to initialize.
3229 * Returns : Void. May exit in case of errors.
3231 *********************************************************************/
3232 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
3234 #ifdef FEATURE_PTHREAD
3235 int err = pthread_mutex_init(mutex, 0);
3238 printf("Fatal error. Mutex initialization failed: %s.\n",
3243 InitializeCriticalSection(mutex);
3244 #endif /* def FEATURE_PTHREAD */
3246 #endif /* def MUTEX_LOCKS_AVAILABLE */
3248 /*********************************************************************
3250 * Function : initialize_mutexes
3252 * Description : Prepares mutexes if mutex support is available.
3256 * Returns : Void, exits in case of errors.
3258 *********************************************************************/
3259 static void initialize_mutexes(void)
3261 #ifdef MUTEX_LOCKS_AVAILABLE
3263 * Prepare global mutex semaphores
3265 privoxy_mutex_init(&log_mutex);
3266 privoxy_mutex_init(&log_init_mutex);
3267 privoxy_mutex_init(&connection_reuse_mutex);
3270 * XXX: The assumptions below are a bit naive
3271 * and can cause locks that aren't necessary.
3273 * For example older FreeBSD versions (< 6.x?)
3274 * have no gethostbyname_r, but gethostbyname is
3277 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
3278 privoxy_mutex_init(&resolver_mutex);
3279 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
3281 * XXX: should we use a single mutex for
3282 * localtime() and gmtime() as well?
3284 #ifndef HAVE_GMTIME_R
3285 privoxy_mutex_init(&gmtime_mutex);
3286 #endif /* ndef HAVE_GMTIME_R */
3288 #ifndef HAVE_LOCALTIME_R
3289 privoxy_mutex_init(&localtime_mutex);
3290 #endif /* ndef HAVE_GMTIME_R */
3293 privoxy_mutex_init(&rand_mutex);
3294 #endif /* ndef HAVE_RANDOM */
3295 #endif /* def MUTEX_LOCKS_AVAILABLE */
3299 /*********************************************************************
3303 * Description : Load the config file and start the listen loop.
3304 * This function is a lot more *sane* with the `load_config'
3305 * and `listen_loop' functions; although it stills does
3306 * a *little* too much for my taste.
3309 * 1 : argc = Number of parameters (including $0).
3310 * 2 : argv = Array of (char *)'s to the parameters.
3312 * Returns : 1 if : can't open config file, unrecognized directive,
3313 * stats requested in multi-thread mode, can't open the
3314 * log file, can't open the jar file, listen port is invalid,
3315 * any load fails, and can't bind port.
3317 * Else main never returns, the process must be signaled
3318 * to terminate execution. Or, on Windows, use the
3319 * "File", "Exit" menu option.
3321 *********************************************************************/
3323 int real_main(int argc, const char *argv[])
3325 int main(int argc, const char *argv[])
3329 unsigned int random_seed;
3331 struct passwd *pw = NULL;
3332 struct group *grp = NULL;
3335 char *pre_chroot_nslookup_to_load_resolver = NULL;
3342 #if !defined(_WIN32)
3350 * Parse the command line arguments
3352 * XXX: simply printing usage information in case of
3353 * invalid arguments isn't particularly user friendly.
3355 while (++argc_pos < argc)
3358 /* Check to see if the service must be installed or uninstalled */
3359 if (strncmp(argv[argc_pos], "--install", 9) == 0)
3361 const char *pName = argv[argc_pos] + 9;
3364 exit( (install_service(pName)) ? 0 : 1 );
3366 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
3368 const char *pName = argv[argc_pos] + 11;
3371 exit((uninstall_service(pName)) ? 0 : 1);
3373 else if (strcmp(argv[argc_pos], "--service" ) == 0)
3375 bRunAsService = TRUE;
3376 w32_set_service_cwd();
3377 atexit(w32_service_exit_notify);
3380 #endif /* defined(_WIN32) */
3383 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3385 if (strcmp(argv[argc_pos], "--help") == 0)
3390 else if(strcmp(argv[argc_pos], "--version") == 0)
3392 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
3398 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
3403 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
3405 if (++argc_pos == argc) usage(argv[0]);
3406 pidfile = strdup(argv[argc_pos]);
3409 else if (strcmp(argv[argc_pos], "--user" ) == 0)
3411 if (++argc_pos == argc) usage(argv[argc_pos]);
3413 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
3416 if (NULL == (grp = getgrnam(p)))
3418 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
3422 if (NULL == (pw = getpwnam(argv[argc_pos])))
3424 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
3427 if (p != NULL) *--p = '\0';
3430 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
3432 if (++argc_pos == argc) usage(argv[0]);
3433 pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
3436 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
3440 #endif /* defined(unix) */
3442 else if (argc_pos + 1 != argc)
3445 * This is neither the last command line
3446 * option, nor was it recognized before,
3447 * therefore it must be invalid.
3453 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3455 configfile = argv[argc_pos];
3458 } /* -END- while (more arguments) */
3461 if ( *configfile != '/' )
3463 char cwd[BUFFER_SIZE];
3465 size_t abs_file_size;
3467 /* make config-filename absolute here */
3468 if (NULL == getcwd(cwd, sizeof(cwd)))
3470 perror("failed to get current working directory");
3475 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3476 basedir = strdup(cwd);
3478 if (NULL == basedir ||
3479 NULL == (abs_file = malloc(abs_file_size)))
3481 perror("malloc failed");
3484 strlcpy(abs_file, basedir, abs_file_size);
3485 strlcat(abs_file, "/", abs_file_size );
3486 strlcat(abs_file, configfile, abs_file_size);
3487 configfile = abs_file;
3489 #endif /* defined unix */
3493 clients->next = NULL;
3495 /* XXX: factor out initialising after the next stable release. */
3498 #elif defined(_WIN32)
3502 /* Prepare mutexes if supported and necessary. */
3503 initialize_mutexes();
3505 /* Enable logging until further notice. */
3506 init_log_module(Argv[0]);
3508 random_seed = (unsigned int)time(NULL);
3510 srandom(random_seed);
3513 #endif /* ifdef HAVE_RANDOM */
3516 * Unix signal handling
3518 * Catch the abort, interrupt and terminate signals for a graceful exit
3519 * Catch the hangup signal so the errlog can be reopened.
3520 * Ignore the broken pipe signals (FIXME: Why?)
3522 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3525 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3526 const int ignored_signals[] = { SIGPIPE, 0 };
3528 for (idx = 0; catched_signals[idx] != 0; idx++)
3530 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3531 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3533 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3534 #endif /* ifdef sun */
3536 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3540 for (idx = 0; ignored_signals[idx] != 0; idx++)
3542 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3544 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3549 #else /* ifdef _WIN32 */
3550 # ifdef _WIN_CONSOLE
3552 * We *are* in a windows console app.
3553 * Print a verbose messages about FAQ's and such
3555 printf("%s", win32_blurb);
3556 # endif /* def _WIN_CONSOLE */
3557 #endif /* def _WIN32 */
3560 /* Initialize the CGI subsystem */
3561 cgi_init_error_messages();
3564 * If runnig on unix and without the --nodaemon
3565 * option, become a daemon. I.e. fork, detach
3566 * from tty and get process group leadership
3579 if ( pid < 0 ) /* error */
3584 else if ( pid != 0 ) /* parent */
3589 * must check for errors
3590 * child died due to missing files aso
3593 wpid = waitpid( pid, &status, WNOHANG );
3602 /* Should be more portable, but not as well tested */
3607 #else /* ndef __FreeBSD__ */
3609 #endif /* ndef __FreeBSD__ */
3610 fd = open("/dev/tty", O_RDONLY);
3613 /* no error check here */
3614 ioctl( fd, TIOCNOTTY,0 );
3619 * stderr (fd 2) will be closed later on, when the
3620 * log file has been parsed.
3627 } /* -END- if (!no_daemon) */
3630 * As soon as we have written the PID file, we can switch
3631 * to the user and group ID indicated by the --user option
3637 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3639 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3645 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3647 /* Read the time zone file from /etc before doing chroot. */
3649 if (NULL != pre_chroot_nslookup_to_load_resolver
3650 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3652 /* Initialize resolver library. */
3653 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3655 if (chroot(pw->pw_dir) < 0)
3657 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3661 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3664 if (setuid(pw->pw_uid))
3666 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3670 char putenv_dummy[64];
3672 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3673 if (putenv(putenv_dummy) != 0)
3675 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3678 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3679 if (putenv(putenv_dummy) != 0)
3681 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3687 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3690 #endif /* defined unix */
3693 /* This will be FALSE unless the command line specified --service
3697 /* Yup, so now we must attempt to establish a connection
3698 * with the service dispatcher. This will only work if this
3699 * process was launched by the service control manager to
3700 * actually run as a service. If this isn't the case, i've
3701 * known it take around 30 seconds or so for the call to return.
3704 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3705 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3707 /* Service has run, and at this point is now being stopped, so just return */
3712 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3714 /* An error occurred. Usually it's because --service was wrongly specified
3715 * and we were unable to connect to the Service Control Dispatcher because
3716 * it wasn't expecting us and is therefore not listening.
3718 * For now, just continue below to call the listen_loop function.
3721 #endif /* def _WIN32 */
3731 /*********************************************************************
3733 * Function : bind_port_helper
3735 * Description : Bind the listen port. Handles logging, and aborts
3739 * 1 : config = Privoxy configuration. Specifies port
3742 * Returns : Port that was opened.
3744 *********************************************************************/
3745 static jb_socket bind_port_helper(struct configuration_spec * config)
3750 if (config->haddr == NULL)
3752 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3757 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3758 config->hport, config->haddr);
3761 result = bind_port(config->haddr, config->hport, &bfd);
3768 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3769 "There may be another Privoxy or some other "
3770 "proxy running on port %d",
3771 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
3772 config->hport, config->hport);
3775 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3776 "The hostname is not resolvable",
3777 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3780 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
3781 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3784 /* shouldn't get here */
3785 return JB_INVALID_SOCKET;
3788 config->need_bind = 0;
3795 /* Without this simple workaround we get this compiler warning from _beginthread
3796 * warning C4028: formal parameter 1 different from declaration
3798 void w32_service_listen_loop(void *p)
3802 #endif /* def _WIN32 */
3805 /*********************************************************************
3807 * Function : listen_loop
3809 * Description : bind the listen port and enter a "FOREVER" listening loop.
3815 *********************************************************************/
3816 static void listen_loop(void)
3818 struct client_state *csp = NULL;
3820 struct configuration_spec * config;
3822 config = load_config();
3824 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3826 * XXX: Should be relocated once it no
3827 * longer needs to emit log messages.
3829 initialize_reusable_connections();
3830 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3832 bfd = bind_port_helper(config);
3834 #ifdef FEATURE_GRACEFUL_TERMINATION
3835 while (!g_terminate)
3840 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
3841 while (waitpid(-1, NULL, WNOHANG) > 0)
3843 /* zombie children */
3845 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
3848 * Free data that was used by died threads
3854 * Re-open the errlog after HUP signal
3856 if (received_hup_signal)
3858 if (NULL != config->logfile)
3860 init_error_log(Argv[0], config->logfile);
3862 received_hup_signal = 0;
3866 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
3868 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
3872 csp->flags |= CSP_FLAG_ACTIVE;
3873 csp->sfd = JB_INVALID_SOCKET;
3875 csp->config = config = load_config();
3877 if ( config->need_bind )
3880 * Since we were listening to the "old port", we will not see
3881 * a "listen" param change until the next IJB request. So, at
3882 * least 1 more request must be made for us to find the new
3883 * setting. I am simply closing the old socket and binding the
3886 * Which-ever is correct, we will serve 1 more page via the
3887 * old settings. This should probably be a "show-proxy-args"
3888 * request. This should not be a so common of an operation
3889 * that this will hurt people's feelings.
3894 bfd = bind_port_helper(config);
3897 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
3899 if (!accept_connection(csp, bfd))
3901 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
3914 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
3917 #ifdef FEATURE_TOGGLE
3918 if (global_toggle_state)
3919 #endif /* def FEATURE_TOGGLE */
3921 csp->flags |= CSP_FLAG_TOGGLED_ON;
3924 if (run_loader(csp))
3926 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
3927 /* Never get here - LOG_LEVEL_FATAL causes program exit */
3931 if (block_acl(NULL,csp))
3933 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
3934 close_socket(csp->cfd);
3938 #endif /* def FEATURE_ACL */
3940 /* add it to the list of clients */
3941 csp->next = clients->next;
3942 clients->next = csp;
3944 if (config->multi_threaded)
3948 /* this is a switch () statment in the C preprocessor - ugh */
3949 #undef SELECTED_ONE_OPTION
3951 /* Use Pthreads in preference to native code */
3952 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
3953 #define SELECTED_ONE_OPTION
3955 pthread_t the_thread;
3956 pthread_attr_t attrs;
3958 pthread_attr_init(&attrs);
3959 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
3960 errno = pthread_create(&the_thread, &attrs,
3961 (void * (*)(void *))serve, csp);
3962 child_id = errno ? -1 : 0;
3963 pthread_attr_destroy(&attrs);
3967 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
3968 #define SELECTED_ONE_OPTION
3969 child_id = _beginthread(
3970 (void (*)(void *))serve,
3975 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
3976 #define SELECTED_ONE_OPTION
3977 child_id = _beginthread(
3978 (void(* _Optlink)(void*))serve,
3984 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
3985 #define SELECTED_ONE_OPTION
3987 thread_id tid = spawn_thread
3988 (server_thread, "server", B_NORMAL_PRIORITY, csp);
3990 if ((tid >= 0) && (resume_thread(tid) == B_OK))
3992 child_id = (int) tid;
4001 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
4002 #define SELECTED_ONE_OPTION
4003 csp->cfd = ReleaseSocket(csp->cfd, -1);
4006 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4007 NP_Output, Output(),
4008 NP_CloseOutput, FALSE,
4009 NP_Name, (ULONG)"privoxy child",
4013 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4014 NP_Output, Output(),
4015 NP_CloseOutput, FALSE,
4016 NP_Name, (ULONG)"privoxy child",
4017 NP_StackSize, 200*1024,
4023 ((struct Task *)child_id)->tc_UserData = csp;
4024 Signal((struct Task *)child_id, SIGF_SINGLE);
4029 #if !defined(SELECTED_ONE_OPTION)
4032 /* This block is only needed when using fork().
4033 * When using threads, the server thread was
4034 * created and run by the call to _beginthread().
4036 if (child_id == 0) /* child */
4039 #ifdef FEATURE_TOGGLE
4040 int inherited_toggle_state = global_toggle_state;
4041 #endif /* def FEATURE_TOGGLE */
4046 * If we've been toggled or we've blocked the request, tell Mom
4049 #ifdef FEATURE_TOGGLE
4050 if (inherited_toggle_state != global_toggle_state)
4052 rc |= RC_FLAG_TOGGLED;
4054 #endif /* def FEATURE_TOGGLE */
4056 #ifdef FEATURE_STATISTICS
4057 if (csp->flags & CSP_FLAG_REJECTED)
4059 rc |= RC_FLAG_BLOCKED;
4061 #endif /* ndef FEATURE_STATISTICS */
4065 else if (child_id > 0) /* parent */
4067 /* in a fork()'d environment, the parent's
4068 * copy of the client socket and the CSP
4072 #if !defined(_WIN32) && !defined(__CYGWIN__)
4074 wait( &child_status );
4077 * Evaluate child's return code: If the child has
4078 * - been toggled, toggle ourselves
4079 * - blocked its request, bump up the stats counter
4082 #ifdef FEATURE_TOGGLE
4083 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
4085 global_toggle_state = !global_toggle_state;
4087 #endif /* def FEATURE_TOGGLE */
4089 #ifdef FEATURE_STATISTICS
4091 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
4095 #endif /* def FEATURE_STATISTICS */
4097 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
4098 close_socket(csp->cfd);
4099 csp->flags &= ~CSP_FLAG_ACTIVE;
4103 #undef SELECTED_ONE_OPTION
4104 /* end of cpp switch () */
4106 if (child_id < 0) /* failed */
4108 char buf[BUFFER_SIZE];
4110 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
4112 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
4114 write_socket(csp->cfd, buf, strlen(buf));
4115 close_socket(csp->cfd);
4116 csp->flags &= ~CSP_FLAG_ACTIVE;
4127 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
4129 /* Clean up. Aim: free all memory (no leaks) */
4130 #ifdef FEATURE_GRACEFUL_TERMINATION
4132 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
4134 unload_current_config_file();
4135 unload_current_actions_file();
4136 unload_current_re_filterfile();
4137 #ifdef FEATURE_TRUST
4138 unload_current_trust_file();
4141 if (config->multi_threaded)
4148 } while ((clients->next != NULL) && (--i > 0));
4152 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
4163 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
4164 /* Cleanup - remove taskbar icon etc. */
4169 #endif /* FEATURE_GRACEFUL_TERMINATION */