1 const char jcc_rcs[] = "$Id: jcc.c,v 1.199 2008/10/26 15:36:10 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 1.199 2008/10/26 15:36:10 fabiankeil
37 * Remove two debug messages with LOG_LEVEL_INFO.
39 * Revision 1.198 2008/10/22 15:19:55 fabiankeil
40 * Once More, With Feeling: if there is no logfile
41 * because the user didn't specify one, we shouldn't
42 * call init_error_log() after receiving SIGHUP either.
44 * Revision 1.197 2008/10/20 17:02:40 fabiankeil
45 * If SIGHUP is received while we aren't running in daemon
46 * mode, calling init_error_log() would be a mistake.
48 * Revision 1.196 2008/10/16 09:16:41 fabiankeil
49 * - Fix two gcc44 conversion warnings.
50 * - Don't bother logging the last five bytes
53 * Revision 1.195 2008/10/13 16:04:37 fabiankeil
54 * Make sure we don't try to reuse tainted server sockets.
56 * Revision 1.194 2008/10/12 18:35:18 fabiankeil
57 * The last commit was a bit too ambitious, apparently the content
58 * length adjustment is only necessary if we aren't buffering.
60 * Revision 1.193 2008/10/12 15:57:35 fabiankeil
61 * Fix content length calculation if we read headers
62 * and the start of the body at once. Now that we have
63 * FEATURE_CONNECTION_KEEP_ALIVE, it actually matters.
65 * Revision 1.192 2008/10/11 18:19:14 fabiankeil
66 * Even more chat() cosmetics.
68 * Revision 1.191 2008/10/11 18:00:14 fabiankeil
69 * Reformat some comments in chat().
71 * Revision 1.190 2008/10/11 14:58:00 fabiankeil
72 * In case of chunk-encoded content, stop reading if
73 * the buffer looks like it ends with the last chunk.
75 * Revision 1.189 2008/10/11 09:53:00 fabiankeil
76 * Let server_response_is_complete() deal properly with
77 * content that is neither buffered nor read all at once.
79 * Revision 1.188 2008/10/09 18:21:41 fabiankeil
80 * Flush work-in-progress changes to keep outgoing connections
81 * alive where possible. Incomplete and mostly #ifdef'd out.
83 * Revision 1.187 2008/09/07 12:35:05 fabiankeil
84 * Add mutex lock support for _WIN32.
86 * Revision 1.186 2008/09/04 08:13:58 fabiankeil
87 * Prepare for critical sections on Windows by adding a
88 * layer of indirection before the pthread mutex functions.
90 * Revision 1.185 2008/08/30 12:03:07 fabiankeil
91 * Remove FEATURE_COOKIE_JAR.
93 * Revision 1.184 2008/08/22 15:34:45 fabiankeil
94 * - Silence LLVM/Clang complaint.
95 * - Make received_hup_signal static.
96 * - Hide definitions for basedir, pidfile and received_hup_signal
97 * from __EMX__ as they only seem to be used in case of #ifdef unix.
99 * Revision 1.183 2008/08/21 07:09:35 fabiankeil
100 * Accept Shoutcast responses again. Problem reported
101 * and fix suggested by Stefan in #2062860.
103 * Revision 1.182 2008/06/27 11:13:56 fabiankeil
104 * Fix possible NULL-pointer dereference reported
105 * by din_a4 in #2003937. Pointy hat to me.
107 * Revision 1.181 2008/05/21 15:47:15 fabiankeil
108 * Streamline sed()'s prototype and declare
109 * the header parse and add structures static.
111 * Revision 1.180 2008/05/21 15:26:32 fabiankeil
112 * - Mark csp as immutable for send_crunch_response().
113 * - Fix comment spelling.
115 * Revision 1.179 2008/05/20 20:13:32 fabiankeil
116 * Factor update_server_headers() out of sed(), ditch the
117 * first_run hack and make server_patterns_light static.
119 * Revision 1.178 2008/05/10 13:23:38 fabiankeil
120 * Don't provide get_header() with the whole client state
121 * structure when it only needs access to csp->iob.
123 * Revision 1.177 2008/05/10 11:51:12 fabiankeil
124 * Make the "read the rest of the headers" loop a bit more readable.
126 * Revision 1.176 2008/05/10 11:37:57 fabiankeil
127 * - Instead of logging when the IIS5 hack is enabled, log when it fails.
128 * - Remove useless comment.
130 * Revision 1.175 2008/05/09 18:53:59 fabiankeil
131 * Fix comment grammar.
133 * Revision 1.174 2008/05/07 18:05:53 fabiankeil
134 * Remove the pointless buffer in client_protocol_is_unsupported().
136 * Revision 1.173 2008/05/06 15:09:00 fabiankeil
137 * Least-effort fix for bug #1821930 (reported by Lee):
138 * If the response doesn't look like HTTP,
139 * tell the client and log the problem.
141 * Revision 1.172 2008/04/16 16:38:21 fabiankeil
142 * Don't pass the whole csp structure to flush_socket()
143 * when it only needs a file descriptor and a buffer.
145 * Revision 1.171 2008/03/27 18:27:25 fabiankeil
146 * Remove kill-popups action.
148 * Revision 1.170 2008/03/06 16:33:46 fabiankeil
149 * If limit-connect isn't used, don't limit CONNECT requests to port 443.
151 * Revision 1.169 2008/03/04 18:30:39 fabiankeil
152 * Remove the treat-forbidden-connects-like-blocks action. We now
153 * use the "blocked" page for forbidden CONNECT requests by default.
155 * Revision 1.168 2008/03/02 12:25:25 fabiankeil
156 * Also use shiny new connect_port_is_forbidden() in jcc.c.
158 * Revision 1.167 2008/02/23 16:57:12 fabiankeil
159 * Rename url_actions() to get_url_actions() and let it
160 * use the standard parameter ordering.
162 * Revision 1.166 2008/02/23 16:33:43 fabiankeil
163 * Let forward_url() use the standard parameter ordering
164 * and mark its second parameter immutable.
166 * Revision 1.165 2008/02/02 19:36:56 fabiankeil
167 * Remove the "Listening ... for local connections only" log message.
168 * Whether or not remote connections are able to reach Privoxy is up
169 * to the operating system.
171 * Revision 1.164 2007/12/16 18:32:46 fabiankeil
172 * Prevent the log messages for CONNECT requests to unacceptable
173 * ports from printing the limit-connect argument as [null] if
174 * limit-connect hasn't been explicitly enabled.
176 * Revision 1.163 2007/12/13 01:47:11 david__schmidt
177 * Make sure all console-mode apps get a usage() instance
179 * Revision 1.162 2007/12/06 17:54:57 fabiankeil
180 * Reword NO_SERVER_DATA_RESPONSE to make it harder
181 * to misunderstand what the message is all about.
183 * Revision 1.161 2007/12/04 19:44:22 fabiankeil
184 * Unbreak trustfile which previously didn't work without
185 * FEATURE_TOGGLE. Fixes BR#1843585, reported by Lee.
187 * Revision 1.160 2007/11/29 18:00:29 fabiankeil
188 * Plug memory leak. Spotted by Valgrind, triggered by
189 * Privoxy-Regression-Test feeding proxyfuzz.py.
191 * Revision 1.159 2007/11/24 14:34:09 fabiankeil
192 * In the HTTP snipplets, refer to the client as client.
194 * Revision 1.158 2007/11/11 16:44:17 fabiankeil
195 * Emit a log message when activating the MS IIS5 hack.
197 * Revision 1.157 2007/11/03 17:34:49 fabiankeil
198 * Log the "weak randomization factor" warning only
199 * once for mingw32 and provide some more details.
201 * Revision 1.156 2007/11/01 18:20:58 fabiankeil
202 * Initialize log module after initializing mutexes, future
203 * deadlocks in that code should now work cross-platform.
205 * Revision 1.155 2007/10/23 20:12:45 fabiankeil
206 * Fix first CSUCCEED line to end in \r\n as required by RFC1945.
207 * Reported by Bert van Leeuwen in BR#1818808.
209 * Revision 1.154 2007/10/19 17:00:08 fabiankeil
210 * Downgrade "Flushing header and buffers" message to LOG_LEVEL_INFO.
212 * Revision 1.153 2007/10/14 14:12:41 fabiankeil
213 * When in daemon mode, close stderr after the configuration file has been
214 * parsed the first time. If logfile isn't set, stop logging. Fixes BR#897436.
216 * Revision 1.152 2007/10/04 18:03:34 fabiankeil
217 * - Fix a crash when parsing invalid requests whose first header
218 * is rejected by get_header(). Regression (re?)introduced
219 * in r1.143 by yours truly.
220 * - Move ACTION_VANILLA_WAFER handling into parsers.c's
221 * client_cookie_adder() to make sure send-vanilla-wafer can be
222 * controlled through tags (and thus regression-tested).
224 * Revision 1.151 2007/09/29 10:21:16 fabiankeil
225 * - Move get_filter_function() from jcc.c to filters.c
226 * so the filter functions can be static.
227 * - Don't bother filtering body-less responses.
229 * Revision 1.150 2007/09/28 16:39:29 fabiankeil
230 * Execute content filters through execute_content_filter().
232 * Revision 1.149 2007/09/04 15:08:48 fabiankeil
233 * Initialize req to NULL to make sure it's defined if the
234 * first read_socket() call fails. Reported by icmp30.
236 * Revision 1.148 2007/08/26 16:47:13 fabiankeil
237 * Add Stephen Gildea's --pre-chroot-nslookup patch [#1276666],
238 * extensive comments moved to user manual.
240 * Revision 1.147 2007/08/25 14:42:40 fabiankeil
241 * Don't crash if a broken header filter wiped out the request line.
243 * Revision 1.146 2007/08/20 17:09:32 fabiankeil
244 * Fix byte_count calculation in case of flushes
245 * and don't parse the server headers a second time.
247 * Revision 1.145 2007/08/19 13:13:31 fabiankeil
248 * - If there's a connection problem after we already forwarded
249 * parts of the original content, just hang up. Fixes BR#1776724.
250 * - Fix warnings about unused code on mingw32.
251 * - In case of flushes, calculate the byte count
252 * less incorrectly (I think).
254 * Revision 1.144 2007/08/11 14:43:22 fabiankeil
255 * Add some more prototypes for static functions.
257 * Revision 1.143 2007/08/05 13:58:19 fabiankeil
258 * Comment out request_contains_null_bytes() until it's used again.
260 * Revision 1.142 2007/08/05 13:50:26 fabiankeil
261 * #1763173 from Stefan Huehner: s@const static@static const@
262 * and declare some more functions static.
264 * Revision 1.141 2007/08/04 09:56:23 fabiankeil
265 * - Log rejected CONNECT requests with LOG_LEVEL_INFO
266 * and explain why they were rejected in the first place.
267 * - Fix the LOG_LEVEL_CLF message for crunches of unallowed
268 * CONNECT requests. The request line was missing.
269 * - Add two more XXX reminders as we don't have enough already.
271 * Revision 1.140 2007/07/21 11:51:36 fabiankeil
272 * As Hal noticed, checking dispatch_cgi() as the last cruncher
273 * looks like a bug if CGI requests are blocked unintentionally,
274 * so don't do it unless the user enabled the new config option
275 * "allow-cgi-request-crunching".
277 * Revision 1.139 2007/07/14 07:46:41 fabiankeil
278 * - Allow to rewrite the request destination behind the client's back.
279 * - Turn the weird-looking unconditional for loop that
280 * reads the client request into a conditional while loop.
281 * Move the stuff that only runs once out of the loop.
282 * - Move parts of chat(), server_content_type() and the
283 * necessary stuff to fix BR#1750917 into get_filter_function().
285 * Revision 1.138 2007/06/03 18:45:18 fabiankeil
286 * Temporary workaround for BR#1730105.
288 * Revision 1.137 2007/06/01 18:16:36 fabiankeil
289 * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
290 * deadlocks and crashes on OpenBSD and possibly other OS with neither
291 * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
292 * Thanks to Ralf Horstmann for report and solution.
294 * Revision 1.136 2007/06/01 16:41:11 fabiankeil
295 * Add forward-override{} to change the forwarding settings through
296 * action sections. This is mainly interesting to forward different
297 * clients differently (for example based on User-Agent or request
300 * Revision 1.135 2007/05/24 17:03:50 fabiankeil
301 * - Let usage() mention the --chroot parameter.
302 * - Use read_socket() consistently and always leave
303 * the last buffer byte alone, even in cases where
304 * null termination (currently) doesn't matter.
306 * Revision 1.134 2007/05/16 14:59:46 fabiankeil
307 * - Fix config file loading on Unix if no config file is specified.
308 * Since r1.97 Privoxy would always interpret the last argument as
309 * config file, even if it's a valid command line option.
310 * - Abort in case of unrecognized command line options. Closes #1719696.
311 * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
312 * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
314 * Revision 1.133 2007/05/04 11:23:19 fabiankeil
315 * - Don't rerun crunchers that only depend on the request URL.
316 * - Don't count redirects and CGI requests as "blocked requests".
318 * Revision 1.132 2007/04/25 15:15:17 fabiankeil
319 * Support crunching based on tags created by server-header taggers.
321 * Revision 1.131 2007/04/22 13:24:50 fabiankeil
322 * Make HTTP snippets static (again). Add a Content-Type for those
323 * with content so the browser doesn't guess it based on the URL.
325 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
326 * Move crunching and request line rebuilding out of chat().
328 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
329 * Introduce tags as alternative way to specify which
330 * actions apply to a request. At the moment tags can be
331 * created based on client and server headers.
333 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
334 * Don't CLF-log CONNECT requests twice.
336 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
337 * Log the source address for ACL-related connection drops.
339 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
340 * New config option: enforce-blocks.
342 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
343 * - Move null byte check into separate function.
344 * - Don't confuse the client with error pages
345 * if a CONNECT request was already confirmed.
347 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
348 * Speed up NULL byte escaping and only log the complete
349 * NULL byte requests with header debugging enabled.
351 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
352 * Answer requests that contain NULL bytes with
353 * a custom response instead of waiting for more
354 * data until the client eventually hangs up.
356 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
357 * - Move delivery and logging of crunched responses
358 * from chat() into send_crunch_response().
359 * - Display the reason for generating http_responses.
360 * - Log the content length for LOG_LEVEL_CLF correctly
361 * (still incorrect for some fixed responses).
362 * - Reword an incorrect comment about
363 * treat-forbidden-connects-like-blocks violating
365 * - Add some log messages.
367 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
368 * Move mutex initialization into separate
369 * function and exit in case of errors.
371 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
372 * - Start to reduce chat()'s line count and move
373 * parts of it into separate functions.
374 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
376 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
377 * - Add Proxy-Agent header to HTTP snippets that are
378 * supposed to reach HTTP clients only.
379 * - Made a few CONNECT log messages more descriptive.
380 * - Catch completely empty server responses (as seen
381 * with Tor's fake ".noconnect" top level domain).
382 * - Use shiny new "forwarding-failed" template for socks errors.
384 * Revision 1.118 2007/01/07 07:43:43 joergs
385 * AmigaOS4 support added.
387 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
388 * Added config option accept-intercepted-requests
389 * and disabled it by default.
391 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
392 * Reverted parts of my last commit
393 * to keep error handling working.
395 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
396 * Fixed gcc43 conversion warnings.
398 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
399 * Fix -pedantic ISO C warning about converting
400 * from function pointer to object pointer.
402 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
403 * Silence compiler warning I introduced with my last commit.
405 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
406 * Mutex protect rand() if POSIX threading
407 * is used, warn the user if that's not possible
408 * and stop using it on _WIN32 where it could
411 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
412 * Don't prevent core dumps by catching SIGABRT.
413 * It's rude and makes debugging unreasonable painful.
415 * Revision 1.110 2006/12/13 14:52:53 etresoft
416 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
418 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
419 * Privoxy is now able to run as intercepting
420 * proxy in combination with any packet filter
421 * that does the port redirection. The destination
422 * is extracted from the "Host:" header which
423 * should be available for nearly all requests.
425 * Moved HTTP snipplets into jcc.c.
426 * Added error message for gopher proxy requests.
428 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
429 * Only unlink the pidfile if it's actually used.
431 * Change order of interception checks to make
432 * it possible to block or redirect requests for
435 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
436 * Make pthread mutex locking more generic. Instead of
437 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
438 * and use mutex locking unless there is an _r function
439 * available. Better safe than sorry.
441 * Fixes "./configure --disable-pthread" and should result
442 * in less threading-related problems on pthread-using platforms,
443 * but it still doesn't fix BR#1122404.
445 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
446 * Move pthread.h inclusion from jcc.c to jcc.h.
447 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
449 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
450 * Don't exit after receiving the second SIGHUP on Solaris.
452 * Fixes BR 1052235, but the same problem may exist on other
453 * systems. Once 3.0.6 is out we should use sigset()
454 * where available and see if it breaks anything.
456 * Revision 1.104 2006/09/23 13:26:38 roro
457 * Replace TABs by spaces in source code.
459 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
460 * Fix +redirect{}. Didn't work with -fast-redirects.
462 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
463 * Respond with 400 and a short text message
464 * if the client tries to use Privoxy as FTP proxy.
466 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
467 * Make number of retries in case of forwarded-connect problems
468 * a config file option (forwarded-connect-retries) and use 0 as
471 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
472 * Set random(3) seed.
474 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
475 * Follow the OpenBSD port's lead and protect the resolve
476 * functions on OpenBSD as well.
478 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
479 * --user fix. Only use the user as group if no group is specified.
480 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
482 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
483 * Windows service (re-)integration
487 * --install[:service_name]
488 * --uninstall[:service_name]
491 * They work as follows:
492 * --install will create a service for you and then terminate.
493 * By default the service name will be "privoxy" (without the quotes).
494 * However you can run multiple services if you wish, just by adding
495 * a colon and then a name (no spaces).
497 * --uninstall follows the exact same rules a --install.
499 * --service is used when the program is executed by the service
500 * control manager, and in normal circumstances would never be
501 * used as a command line argument.
503 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
504 * Windows service integration
506 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
507 * Incorporate Fabian Keil's patch work:
508 http://www.fabiankeil.de/sourcecode/privoxy/
510 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
511 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
512 * with what was really the latest development (the v_3_0_branch branch)
514 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
515 * Thanks to Jindrich Makovicka for a race condition fix for the log
516 * file. The race condition remains for non-pthread implementations.
517 * Reference patch #1175720.
519 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
520 * Add the ability to check jpeg images for invalid
521 * lengths of comment blocks. Defensive strategy
522 * against the exploit:
523 * Microsoft Security Bulletin MS04-028
524 * Buffer Overrun in JPEG Processing (GDI+) Could
525 * Allow Code Execution (833987)
526 * Enabled with +inspect-jpegs in actions files.
528 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
529 * - Fixed usage info for non-unix platforms
530 * - Fixed small cmdline parsing bug
532 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
533 * Diagnostics: Now preserve the returncode of pthread_create
534 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
536 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
537 * No longer ignore SIGCHLD. Fixes bug #769381
539 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
540 * Close jarfile on graceful exit, remove stray line
542 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
543 * Cosmetics: Killed a warning, a typo and an allocation left at exit
545 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
546 * No longer rely on non-POSIX.1 extensions of getcwd().
549 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
550 * Replaced setenv() by posix-compliant putenv()
551 * Thanks to Neil McCalden (nmcc AT users.sf.net).
553 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
554 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
556 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
557 * Clean-up and extension of improvements for forked mode:
558 * - Child's return code now consists of flags RC_FLAG_*
559 * - Reporting toggle to parent now properly #ifdef'ed
560 * - Children now report blocking to parent. This enables
561 * statistics in forked mode
563 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
564 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
565 * Children now report having been toggled through _exit(17), parents
566 * watch for that code and toggle themselves if found.
568 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
569 * Wrapping all *_r functions (the non-_r versions of them) with
570 * mutex semaphores for OSX. Hopefully this will take care of all
571 * of those pesky crash reports.
573 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
574 * Fixed two mostly harmless mem leaks
576 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
577 * Fix: Head of global clients list now initialized to NULL
579 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
580 * Added basic support for OPTIONS and TRACE HTTP methods:
581 * - New interceptor direct_response() added in chat().
582 * - sed() moved to earlier in the process, so that the
583 * Host: header is evaluated before actions and forwarding
586 * Revision 1.92 2002/05/08 16:00:46 oes
587 * Chat's buffer handling:
588 * - Fixed bug with unchecked out-of-mem conditions
589 * while reading client request & server headers
590 * - No longer predict if the buffer limit will be exceeded
591 * in the next read -- check add_to_iob's new
592 * return code. If buffer couldn't be extended
593 * (policy or out-of-mem) while
594 * - reading from client: abort
595 * - reading server headers: send error page
596 * - buffering server body for filter: flush,
597 * and if that fails: send error page
599 * Revision 1.91 2002/04/08 20:35:58 swa
602 * Revision 1.90 2002/04/02 14:57:28 oes
603 * Made sending wafers independent of FEATURE_COOKIE_JAR
605 * Revision 1.89 2002/03/31 17:18:59 jongfoster
606 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
608 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
609 * More compiler warning message maintenance
611 * Revision 1.87 2002/03/26 22:29:54 swa
612 * we have a new homepage!
614 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
615 * Workaround for closing the jarfile before load_config() comes around again
617 * Revision 1.85 2002/03/24 15:23:33 jongfoster
620 * Revision 1.84 2002/03/24 13:25:43 swa
621 * name change related issues
623 * Revision 1.83 2002/03/16 23:54:06 jongfoster
624 * Adding graceful termination feature, to help look for memory leaks.
625 * If you enable this (which, by design, has to be done by hand
626 * editing config.h) and then go to http://i.j.b/die, then the program
627 * will exit cleanly after the *next* request. It should free all the
628 * memory that was used.
630 * Revision 1.82 2002/03/13 00:27:05 jongfoster
633 * Revision 1.81 2002/03/12 01:42:50 oes
634 * Introduced modular filters
636 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
637 * OS/2 port maintenance:
638 * - Fixed EMX build - it had decayed a little
639 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
640 * substituted a memset for now.
642 * Revision 1.79 2002/03/09 20:03:52 jongfoster
643 * - Making various functions return int rather than size_t.
644 * (Undoing a recent change). Since size_t is unsigned on
645 * Windows, functions like read_socket that return -1 on
646 * error cannot return a size_t.
648 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
649 * crashes, and also frequently caused JB to jump to 100%
650 * CPU and stay there. (Because it thought it had just
651 * read ((unsigned)-1) == 4Gb of data...)
653 * - The signature of write_socket has changed, it now simply
654 * returns success=0/failure=nonzero.
656 * - Trying to get rid of a few warnings --with-debug on
657 * Windows, I've introduced a new type "jb_socket". This is
658 * used for the socket file descriptors. On Windows, this
659 * is SOCKET (a typedef for unsigned). Everywhere else, it's
660 * an int. The error value can't be -1 any more, so it's
661 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
662 * Windows it maps to the #define INVALID_SOCKET.)
664 * - The signature of bind_port has changed.
666 * Revision 1.78 2002/03/08 21:35:04 oes
667 * Added optional group supplement to --user option. Will now use default group of user if no group given
669 * Revision 1.77 2002/03/07 03:52:06 oes
670 * - Fixed compiler warnings etc
671 * - Improved handling of failed DNS lookups
673 * Revision 1.76 2002/03/06 22:54:35 jongfoster
674 * Automated function-comment nitpicking.
676 * Revision 1.75 2002/03/06 10:02:19 oes
677 * Fixed stupid bug when --user was not given
679 * Revision 1.74 2002/03/06 00:49:31 jongfoster
680 * Fixing warning on Windows
681 * Making #ifdefs that refer to the same variable consistently
682 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
684 * Revision 1.73 2002/03/05 23:57:30 hal9
685 * Stray character 's' on line 1618 was breaking build.
687 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
688 * - Re-enable OS/2 building after new parms were added
689 * - Fix false out of memory report when resolving CGI templates when no IP
690 * address is available of failed attempt (a la no such domain)
692 * Revision 1.71 2002/03/05 18:13:56 oes
693 * Added --user option
695 * Revision 1.70 2002/03/05 04:52:42 oes
696 * Deleted non-errlog debugging code
698 * Revision 1.69 2002/03/04 23:50:00 jongfoster
699 * Splitting off bind_port() call into bind_port_helper(), with
702 * Revision 1.68 2002/03/04 20:17:32 oes
705 * Revision 1.67 2002/03/04 18:18:57 oes
706 * - Removed _DEBUG mode
707 * - Cleand up cmdline parsing
708 * - Introduced --no-daemon, --pidfile options
709 * - Cleaned up signal handling:
710 * - Terminate cleanly on INT, TERM and ABRT
711 * - Schedule logfile for re-opening on HUP
712 * - Ignore CHLD and PIPE
713 * - Leave the rest with their default handlers
714 * - Uniform handler registration
715 * - Added usage() function
716 * - Played styleguide police
718 * Revision 1.66 2002/03/03 15:06:55 oes
719 * Re-enabled automatic config reloading
721 * Revision 1.65 2002/03/03 14:49:11 oes
722 * Fixed CLF logging: Now uses client's original HTTP request
724 * Revision 1.64 2002/03/03 09:18:03 joergs
725 * Made jumbjuster work on AmigaOS again.
727 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
728 * Clean up a little CRLF unpleasantness that suddenly appeared
730 * Revision 1.62 2002/02/20 23:17:23 jongfoster
731 * Detecting some out-of memory conditions and exiting with a log message.
733 * Revision 1.61 2002/01/17 21:01:52 jongfoster
734 * Moving all our URL and URL pattern parsing code to urlmatch.c.
736 * Revision 1.60 2001/12/30 14:07:32 steudten
737 * - Add signal handling (unix)
738 * - Add SIGHUP handler (unix)
739 * - Add creation of pidfile (unix)
740 * - Add action 'top' in rc file (RH)
741 * - Add entry 'SIGNALS' to manpage
742 * - Add exit message to logfile (unix)
744 * Revision 1.59 2001/12/13 14:07:18 oes
745 * Fixed Bug: 503 error page now sent OK
747 * Revision 1.58 2001/11/30 23:37:24 jongfoster
748 * Renaming the Win32 config file to config.txt - this is almost the
749 * same as the corresponding UNIX name "config"
751 * Revision 1.57 2001/11/16 00:47:43 jongfoster
752 * Changing the tty-disconnection code to use setsid().
754 * Revision 1.56 2001/11/13 20:20:54 jongfoster
755 * Tabs->spaces, fixing a bug with missing {} around an if()
757 * Revision 1.55 2001/11/13 20:14:53 jongfoster
758 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
760 * Revision 1.54 2001/11/07 00:03:14 steudten
761 * Give reliable return value if an error
762 * occurs not just 0 with new daemon mode.
764 * Revision 1.53 2001/11/05 21:41:43 steudten
765 * Add changes to be a real daemon just for unix os.
766 * (change cwd to /, detach from controlling tty, set
767 * process group and session leader to the own process.
769 * Add some fatal-error log message for failed malloc().
770 * Add '-d' if compiled with 'configure --with-debug' to
771 * enable debug output.
773 * Revision 1.52 2001/10/26 20:11:20 jongfoster
774 * Fixing type mismatch
776 * Revision 1.51 2001/10/26 17:38:28 oes
779 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
780 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
781 * threads to call select() simultaneously. So, it's time to do a real, live,
782 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
783 * (native). Both versions will work, but using __OS2__ offers multi-threading.
785 * Revision 1.49 2001/10/23 21:41:35 jongfoster
786 * Added call to initialize the (statically-allocated of course)
787 * "out of memory" CGI response.
789 * Revision 1.48 2001/10/10 19:56:46 jongfoster
790 * Moving some code that wasn't cookie-related out of an #ifdef
793 * Revision 1.47 2001/10/10 16:44:36 oes
794 * Added CONNECT destination port limitation check
796 * Revision 1.46 2001/10/08 15:17:41 oes
797 * Re-enabled SSL forwarding
799 * Revision 1.45 2001/10/07 15:42:11 oes
800 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
802 * Moved downgrading of the HTTP version from parse_http_request to
803 * chat(), since we can't decide if it is necessary before we have
804 * determined the actions for the URL. The HTTP command is now
805 * *always* re-built so the repairs need no longer be special-cased.
807 * filter_popups now gets a csp pointer so it can raise the new
808 * CSP_FLAG_MODIFIED flag.
812 * Added configurable size limit for the IOB. If the IOB grows so
813 * large that the next read would exceed the limit, the header
814 * is generated, and the header & unfiltered buffer are flushed
815 * to the client. Chat then continues in non-buffering,
816 * non-filtering body mode.
818 * Revision 1.44 2001/10/02 18:13:57 oes
821 * Revision 1.43 2001/10/02 15:32:13 oes
822 * Moved generation of hdr
824 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
825 * Cleaning up 2 compiler warnings on OS/2.
827 * Revision 1.41 2001/09/16 17:05:14 jongfoster
828 * Removing unused #include showarg.h
830 * Revision 1.40 2001/09/16 15:41:45 jongfoster
831 * Fixing signed/unsigned comparison warning.
833 * Revision 1.39 2001/09/16 13:21:27 jongfoster
834 * Changes to use new list functions.
836 * Revision 1.38 2001/09/16 13:01:46 jongfoster
837 * Removing redundant function call that zeroed zalloc()'d memory.
839 * Revision 1.37 2001/09/10 11:12:24 oes
840 * Deleted unused variable
842 * Revision 1.36 2001/09/10 10:56:15 oes
843 * Silenced compiler warnings
845 * Revision 1.35 2001/07/31 14:44:22 oes
846 * Deleted unused size parameter from filter_popups()
848 * Revision 1.34 2001/07/30 22:08:36 jongfoster
849 * Tidying up #defines:
850 * - All feature #defines are now of the form FEATURE_xxx
851 * - Permanently turned off WIN_GUI_EDIT
852 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
854 * Revision 1.33 2001/07/29 19:32:00 jongfoster
855 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
857 * Revision 1.32 2001/07/29 18:47:05 jongfoster
858 * Adding missing #include "loadcfg.h"
860 * Revision 1.31 2001/07/29 12:17:48 oes
861 * Applied pthread fix by Paul Lieverse
863 * Revision 1.30 2001/07/25 22:57:13 jongfoster
864 * __BEOS__ no longer overrides FEATURE_PTHREAD.
865 * This is because FEATURE_PTHREAD will soon be widely used, so I
866 * want to keep it simple.
868 * Revision 1.29 2001/07/24 12:47:06 oes
869 * Applied BeOS support update by Eugenia
871 * Revision 1.28 2001/07/23 13:26:12 oes
872 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
874 * Revision 1.27 2001/07/19 19:09:47 haroon
875 * - Added code to take care of the situation where while processing the first
876 * server response (which includes the server header), after finding the end
877 * of the headers we were not looking past the end of the headers for
878 * content modification. I enabled it for filter_popups.
879 * Someone else should look to see if other similar operations should be
880 * done to the discarded portion of the buffer.
882 * Note 2001/07/20: No, the other content modification mechanisms will process
883 * the whole iob later anyway. --oes
885 * Revision 1.26 2001/07/18 12:31:36 oes
888 * Revision 1.25 2001/07/15 19:43:49 jongfoster
889 * Supports POSIX threads.
890 * Also removed some unused #includes.
892 * Revision 1.24 2001/07/13 14:00:40 oes
893 * - Generic content modification scheme:
894 * Each feature has its own applicability flag that is set
895 * from csp->action->flags.
896 * Replaced the "filtering" int flag , by a function pointer
897 * "content_filter" to the function that will do the content
898 * modification. If it is != NULL, the document will be buffered
899 * and processed through *content_filter, which must set
900 * csp->content_length and return a modified copy of the body
901 * or return NULL (on failiure).
902 * - Changed csp->is_text to the more generic bitmap csp->content_type
903 * which can currently take the valued CT_TEXT or CT_GIF
905 * - Removed all #ifdef PCRS
907 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
908 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
909 * the `block_acl' call. This prevents a compilation error when the user
910 * does not wish to use the "ACL" feature.
912 * Revision 1.22 2001/06/29 21:45:41 oes
913 * Indentation, CRLF->LF, Tab-> Space
915 * Revision 1.21 2001/06/29 13:29:36 oes
916 * - Cleaned up, improved comments
917 * - Unified all possible interceptors (CGI,
918 * block, trust, fast_redirect) in one
919 * place, with one (CGI) answer generation
920 * mechansim. Much clearer now.
921 * - Removed the GIF image generation, which
922 * is now done in filters.c:block_url()
923 * - Made error conditions like domain lookup
924 * failiure or (various) problems while talking
925 * to the server use cgi.c:error_response()
926 * instead of generating HTML/HTTP in chat() (yuck!)
927 * - Removed logentry from cancelled commit
929 * Revision 1.20 2001/06/09 10:55:28 jongfoster
930 * Changing BUFSIZ ==> BUFFER_SIZE
932 * Revision 1.19 2001/06/07 23:12:52 jongfoster
933 * Replacing function pointer in struct gateway with a directly
934 * called function forwarded_connect().
935 * Replacing struct gateway with struct forward_spec
937 * Revision 1.18 2001/06/03 19:12:16 oes
938 * introduced new cgi handling
940 * Revision 1.17 2001/06/01 20:07:23 jongfoster
941 * Now uses action +image-blocker{} rather than config->tinygif
943 * Revision 1.16 2001/06/01 18:49:17 jongfoster
944 * Replaced "list_share" with "list" - the tiny memory gain was not
945 * worth the extra complexity.
947 * Revision 1.15 2001/05/31 21:24:47 jongfoster
948 * Changed "permission" to "action" throughout.
949 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
950 * Moved vanilla wafer check into chat(), since we must now
951 * decide whether or not to add it based on the URL.
953 * Revision 1.14 2001/05/29 20:14:01 joergs
954 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
957 * Revision 1.13 2001/05/29 09:50:24 jongfoster
958 * Unified blocklist/imagelist/permissionslist.
959 * File format is still under discussion, but the internal changes
962 * Also modified interceptor behaviour:
963 * - We now intercept all URLs beginning with one of the following
964 * prefixes (and *only* these prefixes):
966 * * http://ijbswa.sf.net/config/
967 * * http://ijbswa.sourceforge.net/config/
968 * - New interceptors "home page" - go to http://i.j.b/ to see it.
969 * - Internal changes so that intercepted and fast redirect pages
970 * are not replaced with an image.
971 * - Interceptors now have the option to send a binary page direct
972 * to the client. (i.e. ijb-send-banner uses this)
973 * - Implemented show-url-info interceptor. (Which is why I needed
974 * the above interceptors changes - a typical URL is
975 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
976 * The previous mechanism would not have intercepted that, and
977 * if it had been intercepted then it then it would have replaced
980 * Revision 1.12 2001/05/27 22:17:04 oes
982 * - re_process_buffer no longer writes the modified buffer
983 * to the client, which was very ugly. It now returns the
984 * buffer, which it is then written by chat.
986 * - content_length now adjusts the Content-Length: header
987 * for modified documents rather than crunch()ing it.
988 * (Length info in csp->content_length, which is 0 for
989 * unmodified documents)
991 * - For this to work, sed() is called twice when filtering.
993 * Revision 1.11 2001/05/26 17:27:53 jongfoster
994 * Added support for CLF and fixed LOG_LEVEL_LOG.
995 * Also did CRLF->LF fix of my previous patch.
997 * Revision 1.10 2001/05/26 15:26:15 jongfoster
998 * ACL feature now provides more security by immediately dropping
999 * connections from untrusted hosts.
1001 * Revision 1.9 2001/05/26 00:28:36 jongfoster
1002 * Automatic reloading of config file.
1003 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
1004 * Most of the global variables have been moved to a new
1005 * struct configuration_spec, accessed through csp->config->globalname
1006 * Most of the globals remaining are used by the Win32 GUI.
1008 * Revision 1.8 2001/05/25 22:43:18 jongfoster
1009 * Fixing minor memory leak and buffer overflow.
1011 * Revision 1.7 2001/05/25 22:34:30 jongfoster
1014 * Revision 1.6 2001/05/23 00:13:58 joergs
1015 * AmigaOS support fixed.
1017 * Revision 1.5 2001/05/22 18:46:04 oes
1019 * - Enabled filtering banners by size rather than URL
1020 * by adding patterns that replace all standard banner
1021 * sizes with the "Junkbuster" gif to the re_filterfile
1023 * - Enabled filtering WebBugs by providing a pattern
1024 * which kills all 1x1 images
1026 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
1027 * which is selected by the (nonstandard and therefore
1028 * capital) letter 'U' in the option string.
1029 * It causes the quantifiers to be ungreedy by default.
1030 * Appending a ? turns back to greedy (!).
1032 * - Added a new interceptor ijb-send-banner, which
1033 * sends back the "Junkbuster" gif. Without imagelist or
1034 * MSIE detection support, or if tinygif = 1, or the
1035 * URL isn't recognized as an imageurl, a lame HTML
1036 * explanation is sent instead.
1038 * - Added new feature, which permits blocking remote
1039 * script redirects and firing back a local redirect
1041 * The feature is conditionally compiled, i.e. it
1042 * can be disabled with --disable-fast-redirects,
1043 * plus it must be activated by a "fast-redirects"
1044 * line in the config file, has its own log level
1045 * and of course wants to be displayed by show-proxy-args
1046 * Note: Boy, all the #ifdefs in 1001 locations and
1047 * all the fumbling with configure.in and acconfig.h
1048 * were *way* more work than the feature itself :-(
1050 * - Because a generic redirect template was needed for
1051 * this, tinygif = 3 now uses the same.
1053 * - Moved GIFs, and other static HTTP response templates
1056 * - Some minor fixes
1058 * - Removed some >400 CRs again (Jon, you really worked
1061 * Revision 1.4 2001/05/21 19:34:01 jongfoster
1062 * Made failure to bind() a fatal error.
1064 * Revision 1.3 2001/05/20 01:21:20 jongfoster
1065 * Version 2.9.4 checkin.
1066 * - Merged popupfile and cookiefile, and added control over PCRS
1067 * filtering, in new "permissionsfile".
1068 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
1069 * file error you now get a message box (in the Win32 GUI) rather
1070 * than the program exiting with no explanation.
1071 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
1073 * - Removed tabs from "config"
1074 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
1075 * - Bumped up version number.
1077 * Revision 1.2 2001/05/17 22:34:44 oes
1078 * - Added hint on GIF char array generation to jcc.c
1079 * - Cleaned CRLF's from the sources and related files
1080 * - Repaired logging for REF and FRC
1082 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
1083 * Initial import of version 2.9.3 source tree
1086 *********************************************************************/
1092 #include <sys/types.h>
1101 # ifndef FEATURE_PTHREAD
1105 # include <windows.h>
1106 # include <process.h>
1107 # endif /* ndef FEATURE_PTHREAD */
1110 # ifndef _WIN_CONSOLE
1111 # include "w32log.h"
1112 # endif /* ndef _WIN_CONSOLE */
1113 # include "w32svrapi.h"
1115 #else /* ifndef _WIN32 */
1117 # if !defined (__OS2__)
1118 # include <unistd.h>
1119 # include <sys/wait.h>
1120 # endif /* ndef __OS2__ */
1121 # include <sys/time.h>
1122 # include <sys/stat.h>
1123 # include <sys/ioctl.h>
1126 #include <sys/termios.h>
1134 # include <signal.h>
1137 # include <socket.h> /* BeOS has select() for sockets only. */
1138 # include <OS.h> /* declarations for threads and stuff. */
1141 # if defined(__EMX__) || defined(__OS2__)
1142 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
1147 #define bzero(B,N) memset(B,0x00,n)
1151 # include <select.h>
1156 #include "project.h"
1159 #include "filters.h"
1160 #include "loaders.h"
1161 #include "parsers.h"
1162 #include "miscutil.h"
1164 #include "jbsockets.h"
1165 #include "gateway.h"
1166 #include "actions.h"
1168 #include "loadcfg.h"
1169 #include "urlmatch.h"
1171 const char jcc_h_rcs[] = JCC_H_VERSION;
1172 const char project_h_rcs[] = PROJECT_H_VERSION;
1175 struct client_state clients[1];
1176 struct file_list files[1];
1178 #ifdef FEATURE_STATISTICS
1179 int urls_read = 0; /* total nr of urls read inc rejected */
1180 int urls_rejected = 0; /* total nr of urls rejected */
1181 #endif /* def FEATURE_STATISTICS */
1183 #ifdef FEATURE_GRACEFUL_TERMINATION
1184 int g_terminate = 0;
1187 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1188 static void sig_handler(int the_signal);
1190 static int client_protocol_is_unsupported(const struct client_state *csp, char *req);
1191 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
1192 static jb_err get_server_headers(struct client_state *csp);
1193 static const char *crunch_reason(const struct http_response *rsp);
1194 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp);
1196 * static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len);
1198 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
1199 static jb_err change_request_destination(struct client_state *csp);
1200 static void chat(struct client_state *csp);
1201 static void serve(struct client_state *csp);
1202 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1203 static void usage(const char *myname);
1205 static void initialize_mutexes(void);
1206 static jb_socket bind_port_helper(struct configuration_spec *config);
1207 static void listen_loop(void);
1210 void serve(struct client_state *csp);
1211 #else /* ifndef AMIGA */
1212 static void serve(struct client_state *csp);
1213 #endif /* def AMIGA */
1216 static int32 server_thread(void *data);
1217 #endif /* def __BEOS__ */
1220 #define sleep(N) Sleep(((N) * 1000))
1224 #define sleep(N) DosSleep(((N) * 100))
1227 #ifdef MUTEX_LOCKS_AVAILABLE
1229 * XXX: Does the locking stuff really belong in this file?
1231 privoxy_mutex_t log_mutex;
1232 privoxy_mutex_t log_init_mutex;
1233 privoxy_mutex_t connection_reuse_mutex;
1235 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
1236 privoxy_mutex_t resolver_mutex;
1237 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
1239 #ifndef HAVE_GMTIME_R
1240 privoxy_mutex_t gmtime_mutex;
1241 #endif /* ndef HAVE_GMTIME_R */
1243 #ifndef HAVE_LOCALTIME_R
1244 privoxy_mutex_t localtime_mutex;
1245 #endif /* ndef HAVE_GMTIME_R */
1248 privoxy_mutex_t rand_mutex;
1249 #endif /* ndef HAVE_RANDOM */
1251 #endif /* def MUTEX_LOCKS_AVAILABLE */
1254 const char *basedir = NULL;
1255 const char *pidfile = NULL;
1256 static int received_hup_signal = 0;
1257 #endif /* defined unix */
1259 /* HTTP snipplets. */
1260 static const char CSUCCEED[] =
1261 "HTTP/1.0 200 Connection established\r\n"
1262 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
1264 static const char CHEADER[] =
1265 "HTTP/1.0 400 Invalid header received from client\r\n"
1266 "Proxy-Agent: Privoxy " VERSION "\r\n"
1267 "Content-Type: text/plain\r\n"
1268 "Connection: close\r\n\r\n"
1269 "Invalid header received from client.\r\n";
1271 static const char FTP_RESPONSE[] =
1272 "HTTP/1.0 400 Invalid request received from client\r\n"
1273 "Content-Type: text/plain\r\n"
1274 "Connection: close\r\n\r\n"
1275 "Invalid request. Privoxy doesn't support FTP.\r\n";
1277 static const char GOPHER_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 gopher.\r\n";
1283 /* XXX: should be a template */
1284 static const char MISSING_DESTINATION_RESPONSE[] =
1285 "HTTP/1.0 400 Bad request received from client\r\n"
1286 "Proxy-Agent: Privoxy " VERSION "\r\n"
1287 "Content-Type: text/plain\r\n"
1288 "Connection: close\r\n\r\n"
1289 "Bad request. Privoxy was unable to extract the destination.\r\n";
1291 /* XXX: should be a template */
1292 static const char NO_SERVER_DATA_RESPONSE[] =
1293 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1294 "Proxy-Agent: Privoxy " VERSION "\r\n"
1295 "Content-Type: text/plain\r\n"
1296 "Connection: close\r\n\r\n"
1297 "Empty server or forwarder response.\r\n"
1298 "The connection has been closed but Privoxy didn't receive any data.\r\n";
1300 /* XXX: should be a template */
1301 static const char INVALID_SERVER_HEADERS_RESPONSE[] =
1302 "HTTP/1.0 502 Server or forwarder response invalid\r\n"
1303 "Proxy-Agent: Privoxy " VERSION "\r\n"
1304 "Content-Type: text/plain\r\n"
1305 "Connection: close\r\n\r\n"
1306 "Bad response. The server or forwarder response doesn't look like HTTP.\r\n";
1309 /* XXX: should be a template */
1310 static const char NULL_BYTE_RESPONSE[] =
1311 "HTTP/1.0 400 Bad request received from client\r\n"
1312 "Proxy-Agent: Privoxy " VERSION "\r\n"
1313 "Content-Type: text/plain\r\n"
1314 "Connection: close\r\n\r\n"
1315 "Bad request. Null byte(s) before end of request.\r\n";
1318 /* XXX: should be a template */
1319 static const char MESSED_UP_REQUEST_RESPONSE[] =
1320 "HTTP/1.0 400 Malformed request after rewriting\r\n"
1321 "Proxy-Agent: Privoxy " VERSION "\r\n"
1322 "Content-Type: text/plain\r\n"
1323 "Connection: close\r\n\r\n"
1324 "Bad request. Messed up with header filters.\r\n";
1326 /* A function to crunch a response */
1327 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
1329 /* Crunch function flags */
1330 #define CF_NO_FLAGS 0
1331 /* Cruncher applies to forced requests as well */
1332 #define CF_IGNORE_FORCE 1
1333 /* Crunched requests are counted for the block statistics */
1334 #define CF_COUNT_AS_REJECT 2
1336 /* A crunch function and its flags */
1339 const crunch_func_ptr cruncher;
1343 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
1345 /* Complete list of cruncher functions */
1346 static const struct cruncher crunchers_all[] = {
1347 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
1348 { block_url, CF_COUNT_AS_REJECT },
1349 #ifdef FEATURE_TRUST
1350 { trust_url, CF_COUNT_AS_REJECT },
1351 #endif /* def FEATURE_TRUST */
1352 { redirect_url, CF_NO_FLAGS },
1353 { dispatch_cgi, CF_IGNORE_FORCE},
1357 /* Light version, used after tags are applied */
1358 static const struct cruncher crunchers_light[] = {
1359 { block_url, CF_COUNT_AS_REJECT },
1360 { redirect_url, CF_NO_FLAGS },
1366 * XXX: Don't we really mean
1372 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1373 /*********************************************************************
1375 * Function : sig_handler
1377 * Description : Signal handler for different signals.
1378 * Exit gracefully on TERM and INT
1379 * or set a flag that will cause the errlog
1380 * to be reopened by the main thread on HUP.
1383 * 1 : the_signal = the signal cause this function to call
1387 *********************************************************************/
1388 static void sig_handler(int the_signal)
1394 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1406 received_hup_signal = 1;
1412 * We shouldn't be here, unless we catch signals
1413 * in main() that we can't handle here!
1415 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1423 /*********************************************************************
1425 * Function : client_protocol_is_unsupported
1427 * Description : Checks if the client used a known unsupported
1428 * protocol and deals with it by sending an error
1432 * 1 : csp = Current client state (buffers, headers, etc...)
1433 * 2 : req = the first request line send by the client
1435 * Returns : TRUE if an error response has been generated, or
1436 * FALSE if the request doesn't look invalid.
1438 *********************************************************************/
1439 static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1442 * If it's a FTP or gopher request, we don't support it.
1444 * These checks are better than nothing, but they might
1445 * not work in all configurations and some clients might
1446 * have problems digesting the answer.
1448 * They should, however, never cause more problems than
1449 * Privoxy's old behaviour (returning the misleading HTML
1452 * "Could not resolve http://(ftp|gopher)://example.org").
1454 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1456 const char *response = NULL;
1457 const char *protocol = NULL;
1459 if (!strncmpic(req, "GET ftp://", 10))
1461 response = FTP_RESPONSE;
1466 response = GOPHER_RESPONSE;
1467 protocol = "GOPHER";
1469 log_error(LOG_LEVEL_ERROR,
1470 "%s tried to use Privoxy as %s proxy: %s",
1471 csp->ip_addr_str, protocol, req);
1472 log_error(LOG_LEVEL_CLF,
1473 "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1475 write_socket(csp->cfd, response, strlen(response));
1484 /*********************************************************************
1486 * Function : get_request_destination_elsewhere
1488 * Description : If the client's request was redirected into
1489 * Privoxy without the client's knowledge,
1490 * the request line lacks the destination host.
1492 * This function tries to get it elsewhere,
1493 * provided accept-intercepted-requests is enabled.
1495 * "Elsewhere" currently only means "Host: header",
1496 * but in the future we may ask the redirecting
1497 * packet filter to look the destination up.
1499 * If the destination stays unknown, an error
1500 * response is send to the client and headers
1501 * are freed so that chat() can return directly.
1504 * 1 : csp = Current client state (buffers, headers, etc...)
1505 * 2 : headers = a header list
1507 * Returns : JB_ERR_OK if the destination is now known, or
1508 * JB_ERR_PARSE if it isn't.
1510 *********************************************************************/
1511 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1515 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1517 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1518 " Privoxy isn't configured to accept intercepted requests.",
1519 csp->ip_addr_str, csp->http->cmd);
1520 /* XXX: Use correct size */
1521 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1522 csp->ip_addr_str, csp->http->cmd);
1524 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1525 destroy_list(headers);
1527 return JB_ERR_PARSE;
1529 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1531 /* Split the domain we just got for pattern matching */
1532 init_domain_components(csp->http);
1538 /* We can't work without destination. Go spread the news.*/
1540 req = list_to_text(headers);
1542 /* XXX: Use correct size */
1543 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1544 csp->ip_addr_str, csp->http->cmd);
1545 log_error(LOG_LEVEL_ERROR,
1546 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1547 csp->ip_addr_str, csp->http->cmd, req);
1550 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
1551 destroy_list(headers);
1553 return JB_ERR_PARSE;
1556 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1557 * to get the destination IP address, use it as host directly
1558 * or do a reverse DNS lookup first.
1563 /*********************************************************************
1565 * Function : get_server_headers
1567 * Description : Parses server headers in iob and fills them
1568 * into csp->headers so that they can later be
1572 * 1 : csp = Current client state (buffers, headers, etc...)
1574 * Returns : JB_ERR_OK if everything went fine, or
1575 * JB_ERR_PARSE if the headers were incomplete.
1577 *********************************************************************/
1578 static jb_err get_server_headers(struct client_state *csp)
1580 int continue_hack_in_da_house = 0;
1583 while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
1588 * continue hack in da house. Ignore the ending of
1589 * this head and continue enlisting header lines.
1590 * The reason is described below.
1592 enlist(csp->headers, "");
1593 continue_hack_in_da_house = 0;
1596 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1599 * It's a bodyless continue response, don't
1600 * stop header parsing after reaching its end.
1602 * As a result Privoxy will concatenate the
1603 * next response's head and parse and deliver
1604 * the headers as if they belonged to one request.
1606 * The client will separate them because of the
1607 * empty line between them.
1609 * XXX: What we're doing here is clearly against
1610 * the intended purpose of the continue header,
1611 * and under some conditions (HTTP/1.0 client request)
1612 * it's a standard violation.
1614 * Anyway, "sort of against the spec" is preferable
1615 * to "always getting confused by Continue responses"
1616 * (Privoxy's behaviour before this hack was added)
1618 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1619 continue_hack_in_da_house = 1;
1621 else if (*header == '\0')
1624 * If the header is empty, but the Continue hack
1625 * isn't active, we can assume that we reached the
1626 * end of the buffer before we hit the end of the
1629 * Inform the caller an let it decide how to handle it.
1631 return JB_ERR_PARSE;
1634 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1637 * XXX: Should we quit the request and return a
1638 * out of memory error page instead?
1640 log_error(LOG_LEVEL_ERROR,
1641 "Out of memory while enlisting server headers. %s lost.",
1651 /*********************************************************************
1653 * Function : crunch_reason
1655 * Description : Translates the crunch reason code into a string.
1658 * 1 : rsp = a http_response
1660 * Returns : A string with the crunch reason or an error description.
1662 *********************************************************************/
1663 static const char *crunch_reason(const struct http_response *rsp)
1665 char * reason = NULL;
1667 assert(rsp != NULL);
1670 return "Internal error while searching for crunch reason";
1673 switch (rsp->reason)
1675 case RSP_REASON_UNSUPPORTED:
1676 reason = "Unsupported HTTP feature";
1678 case RSP_REASON_BLOCKED:
1681 case RSP_REASON_UNTRUSTED:
1682 reason = "Untrusted";
1684 case RSP_REASON_REDIRECTED:
1685 reason = "Redirected";
1687 case RSP_REASON_CGI_CALL:
1688 reason = "CGI Call";
1690 case RSP_REASON_NO_SUCH_DOMAIN:
1691 reason = "DNS failure";
1693 case RSP_REASON_FORWARDING_FAILED:
1694 reason = "Forwarding failed";
1696 case RSP_REASON_CONNECT_FAILED:
1697 reason = "Connection failure";
1699 case RSP_REASON_OUT_OF_MEMORY:
1700 reason = "Out of memory (may mask other reasons)";
1703 reason = "No reason recorded";
1711 /*********************************************************************
1713 * Function : send_crunch_response
1715 * Description : Delivers already prepared response for
1716 * intercepted requests, logs the interception
1717 * and frees the response.
1720 * 1 : csp = Current client state (buffers, headers, etc...)
1721 * 1 : rsp = Fully prepared response. Will be freed on exit.
1723 * Returns : Nothing.
1725 *********************************************************************/
1726 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp)
1728 const struct http_request *http = csp->http;
1729 char status_code[4];
1731 assert(rsp != NULL);
1732 assert(rsp->head != NULL);
1737 * Not supposed to happen. If it does
1738 * anyway, treat it as an unknown error.
1740 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1741 /* return code doesn't matter */
1746 /* If rsp is still NULL, we have serious internal problems. */
1747 log_error(LOG_LEVEL_FATAL,
1748 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1752 * Extract the status code from the actual head
1753 * that was send to the client. It is the only
1754 * way to get it right for all requests, including
1755 * the fixed ones for out-of-memory problems.
1757 * A head starts like this: 'HTTP/1.1 200...'
1761 status_code[0] = rsp->head[9];
1762 status_code[1] = rsp->head[10];
1763 status_code[2] = rsp->head[11];
1764 status_code[3] = '\0';
1766 /* Write the answer to the client */
1767 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1768 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1770 /* There is nothing we can do about it. */
1771 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1774 /* Log that the request was crunched and why. */
1775 log_error(LOG_LEVEL_GPC, "%s%s crunch! (%s)",
1776 http->hostport, http->path, crunch_reason(rsp));
1777 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %d",
1778 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1780 /* Clean up and return */
1781 if (cgi_error_memory() != rsp)
1783 free_http_response(rsp);
1790 /*********************************************************************
1792 * Function : request_contains_null_bytes
1794 * Description : Checks for NULL bytes in the request and sends
1795 * an error message to the client if any were found.
1797 * XXX: currently not used, see comment in chat().
1800 * 1 : csp = Current client state (buffers, headers, etc...)
1801 * 2 : buf = Data from the client's request to check.
1802 * 3 : len = The data length.
1804 * Returns : TRUE if the request contained one or more NULL bytes, or
1807 *********************************************************************/
1808 static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1810 size_t c_len; /* Request lenght when treated as C string */
1812 c_len = strlen(buf);
1817 * Null byte(s) found. Log the request,
1818 * return an error response and hang up.
1820 size_t tmp_len = c_len;
1825 * Replace NULL byte(s) with '°' characters
1826 * so the request can be logged as string.
1827 * XXX: Is there a better replacement character?
1830 tmp_len += strlen(buf+tmp_len);
1831 } while (tmp_len < len);
1833 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1834 "(length=%d, strlen=%d).", csp->ip_addr_str, len, c_len);
1835 log_error(LOG_LEVEL_HEADER,
1836 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1838 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
1840 /* XXX: Log correct size */
1841 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1851 /*********************************************************************
1853 * Function : crunch_response_triggered
1855 * Description : Checks if the request has to be crunched,
1856 * and delivers the crunch response if necessary.
1859 * 1 : csp = Current client state (buffers, headers, etc...)
1860 * 2 : crunchers = list of cruncher functions to run
1862 * Returns : TRUE if the request was answered with a crunch response
1865 *********************************************************************/
1866 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
1868 struct http_response *rsp = NULL;
1869 const struct cruncher *c;
1872 * If CGI request crunching is disabled,
1873 * check the CGI dispatcher out of order to
1874 * prevent unintentional blocks or redirects.
1876 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
1877 && (NULL != (rsp = dispatch_cgi(csp))))
1879 /* Deliver, log and free the interception response. */
1880 send_crunch_response(csp, rsp);
1884 for (c = crunchers; c->cruncher != NULL; c++)
1887 * Check the cruncher if either Privoxy is toggled
1888 * on and the request isn't forced, or if the cruncher
1889 * applies to forced requests as well.
1891 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
1892 !(csp->flags & CSP_FLAG_FORCED)) ||
1893 (c->flags & CF_IGNORE_FORCE))
1895 rsp = c->cruncher(csp);
1898 /* Deliver, log and free the interception response. */
1899 send_crunch_response(csp, rsp);
1900 #ifdef FEATURE_STATISTICS
1901 if (c->flags & CF_COUNT_AS_REJECT)
1903 csp->flags |= CSP_FLAG_REJECTED;
1905 #endif /* def FEATURE_STATISTICS */
1916 /*********************************************************************
1918 * Function : build_request_line
1920 * Description : Builds the HTTP request line.
1922 * If a HTTP forwarder is used it expects the whole URL,
1923 * web servers only get the path.
1926 * 1 : csp = Current client state (buffers, headers, etc...)
1927 * 2 : fwd = The forwarding spec used for the request
1928 * XXX: Should use http->fwd instead.
1929 * 3 : request_line = The old request line which will be replaced.
1931 * Returns : Nothing. Terminates in case of memory problems.
1933 *********************************************************************/
1934 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
1936 struct http_request *http = csp->http;
1938 assert(http->ssl == 0);
1941 * Downgrade http version from 1.1 to 1.0
1942 * if +downgrade action applies.
1944 if ( (csp->action->flags & ACTION_DOWNGRADE)
1945 && (!strcmpic(http->ver, "HTTP/1.1")))
1948 http->ver = strdup("HTTP/1.0");
1950 if (http->ver == NULL)
1952 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1957 * Rebuild the request line.
1959 freez(*request_line);
1960 *request_line = strdup(http->gpc);
1961 string_append(request_line, " ");
1963 if (fwd->forward_host)
1965 string_append(request_line, http->url);
1969 string_append(request_line, http->path);
1971 string_append(request_line, " ");
1972 string_append(request_line, http->ver);
1974 if (*request_line == NULL)
1976 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1978 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
1982 /*********************************************************************
1984 * Function : change_request_destination
1986 * Description : Parse a (rewritten) request line and regenerate
1987 * the http request data.
1990 * 1 : csp = Current client state (buffers, headers, etc...)
1992 * Returns : Forwards the parse_http_request() return code.
1993 * Terminates in case of memory problems.
1995 *********************************************************************/
1996 static jb_err change_request_destination(struct client_state *csp)
1998 struct http_request *http = csp->http;
2001 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
2002 free_http_request(http);
2003 err = parse_http_request(csp->headers->first->str, http, csp);
2004 if (JB_ERR_OK != err)
2006 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
2007 jb_err_to_string(err));
2011 /* XXX: ocmd is a misleading name */
2012 http->ocmd = strdup(http->cmd);
2013 if (http->ocmd == NULL)
2015 log_error(LOG_LEVEL_FATAL,
2016 "Out of memory copying rewritten HTTP request line");
2024 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2025 /*********************************************************************
2027 * Function : server_response_is_complete
2029 * Description : Determines whether we should stop reading
2030 * from the server socket.
2033 * 1 : csp = Current client state (buffers, headers, etc...)
2034 * 2 : content_length = Length of content received so far.
2036 * Returns : TRUE if the response is complete,
2039 *********************************************************************/
2040 static int server_response_is_complete(struct client_state *csp, size_t content_length)
2042 int content_length_known = (csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
2044 if (!strcmpic(csp->http->gpc, "HEAD"))
2047 * "HEAD" implies no body, we are thus expecting
2048 * no content. XXX: incomplete "list" of methods?
2050 csp->expected_content_length = 0;
2051 content_length_known = TRUE;
2054 if (csp->http->status == 304)
2057 * Expect no body. XXX: incomplete "list" of status codes?
2059 csp->expected_content_length = 0;
2060 content_length_known = TRUE;
2063 return (content_length_known && ((0 == csp->expected_content_length)
2064 || (csp->expected_content_length <= content_length)));
2066 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2069 /*********************************************************************
2073 * Description : Once a connection to the client has been accepted,
2074 * this function is called (via serve()) to handle the
2075 * main business of the communication. When this
2076 * function returns, the caller must close the client
2079 * FIXME: chat is nearly thousand lines long.
2083 * 1 : csp = Current client state (buffers, headers, etc...)
2085 * Returns : Nothing.
2087 *********************************************************************/
2088 static void chat(struct client_state *csp)
2090 char buf[BUFFER_SIZE];
2098 int ms_iis5_hack = 0;
2099 size_t byte_count = 0;
2100 int forwarded_connect_retries = 0;
2101 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
2102 const struct forward_spec * fwd;
2103 struct http_request *http;
2104 int len; /* for buffer sizes (and negative error codes) */
2107 /* Function that does the content filtering for the current request */
2108 filter_function_ptr content_filter = NULL;
2110 /* Skeleton for HTTP response, if we should intercept the request */
2111 struct http_response *rsp;
2113 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
2114 struct list header_list;
2115 struct list *headers = &header_list;
2119 memset(buf, 0, sizeof(buf));
2122 * Read the client's request. Note that since we're not using select() we
2123 * could get blocked here if a client connected, then didn't say anything!
2128 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2130 if (len <= 0) break; /* error! */
2133 * If there is no memory left for buffering the
2134 * request, there is nothing we can do but hang up
2136 if (add_to_iob(csp, buf, len))
2141 req = get_header(csp->iob);
2143 } while ((NULL != req) && ('\0' == *req));
2145 if ((NULL != req) && ('\0' != *req))
2147 /* Request received. Validate and parse it. */
2151 * XXX: Temporary disabled to prevent problems
2152 * with POST requests whose bodies are allowed to
2153 * contain NULL bytes. BR#1730105.
2155 * The main purpose of this check is to properly
2156 * log stuff like BitTorrent traffic and other junk
2157 * that hits public proxies. It's not required for
2158 * Privoxy to functions as those requests are discarded
2161 * It probably should be rewritten to only check
2162 * the head of the request. Another option would
2163 * be to let all POST requests pass, although that
2164 * may not be good enough.
2166 if (request_contains_null_bytes(csp, buf, len))
2168 /* NULL bytes found and dealt with, just hang up. */
2173 /* Does the request line look invalid? */
2174 if (client_protocol_is_unsupported(csp, req))
2177 * Yes. The request has already been
2178 * answered with a error response, the buffers
2179 * were freed and we're done with chatting.
2184 #ifdef FEATURE_FORCE_LOAD
2186 * If this request contains the FORCE_PREFIX and blocks
2187 * aren't enforced, get rid of it and set the force flag.
2189 if (strstr(req, FORCE_PREFIX))
2191 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
2193 log_error(LOG_LEVEL_FORCE,
2194 "Ignored force prefix in request: \"%s\".", req);
2198 strclean(req, FORCE_PREFIX);
2199 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
2200 csp->flags |= CSP_FLAG_FORCED;
2204 #endif /* def FEATURE_FORCE_LOAD */
2205 err = parse_http_request(req, http, csp);
2206 if (JB_ERR_OK != err)
2208 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", jb_err_to_string(err));
2214 if (http->cmd == NULL)
2216 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
2217 /* XXX: Use correct size */
2218 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2219 log_error(LOG_LEVEL_ERROR, "Invalid header received from %s.", csp->ip_addr_str);
2221 free_http_request(http);
2225 /* grab the rest of the client's headers */
2229 p = get_header(csp->iob);
2233 /* There are no additional headers to read. */
2240 * We didn't receive a complete header
2241 * line yet, get the rest of it.
2243 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2246 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
2247 destroy_list(headers);
2251 if (add_to_iob(csp, buf, len))
2254 * If there is no memory left for buffering the
2255 * request, there is nothing we can do but hang up
2257 destroy_list(headers);
2264 * We were able to read a complete
2265 * header and can finaly enlist it.
2272 if (http->host == NULL)
2275 * If we still don't know the request destination,
2276 * the request is invalid or the client uses
2277 * Privoxy without its knowledge.
2279 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
2282 * Our attempts to get the request destination
2283 * elsewhere failed or Privoxy is configured
2284 * to only accept proxy requests.
2286 * An error response has already been send
2287 * and we're done here.
2294 * Determine the actions for this URL
2296 #ifdef FEATURE_TOGGLE
2297 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
2299 /* Most compatible set of actions (i.e. none) */
2300 init_current_action(csp->action);
2303 #endif /* ndef FEATURE_TOGGLE */
2305 get_url_actions(csp, http);
2309 * Save a copy of the original request for logging
2311 http->ocmd = strdup(http->cmd);
2313 if (http->ocmd == NULL)
2315 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
2318 enlist(csp->headers, http->cmd);
2320 /* Append the previously read headers */
2321 list_append_list_unique(csp->headers, headers);
2322 destroy_list(headers);
2324 err = sed(csp, FILTER_CLIENT_HEADERS);
2325 if (JB_ERR_OK != err)
2327 assert(err == JB_ERR_PARSE);
2328 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers");
2330 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2332 /* Check request line for rewrites. */
2333 if ((NULL == csp->headers->first->str)
2334 || (strcmp(http->cmd, csp->headers->first->str) &&
2335 (JB_ERR_OK != change_request_destination(csp))))
2338 * A header filter broke the request line - bail out.
2340 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
2341 /* XXX: Use correct size */
2342 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
2343 log_error(LOG_LEVEL_ERROR, "Invalid request line after applying header filters.");
2345 free_http_request(http);
2349 /* decide how to route the HTTP request */
2350 fwd = forward_url(csp, http);
2353 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
2354 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2358 * build the http request to send to the server
2359 * we have to do one of the following:
2361 * create = use the original HTTP request to create a new
2362 * HTTP request that has either the path component
2363 * without the http://domainspec (w/path) or the
2364 * full orininal URL (w/url)
2365 * Note that the path and/or the HTTP version may
2366 * have been altered by now.
2368 * connect = Open a socket to the host:port of the server
2369 * and short-circuit server and client socket.
2371 * pass = Pass the request unchanged if forwarding a CONNECT
2372 * request to a parent proxy. Note that we'll be sending
2373 * the CFAIL message ourselves if connecting to the parent
2374 * fails, but we won't send a CSUCCEED message if it works,
2375 * since that would result in a double message (ours and the
2376 * parent's). After sending the request to the parent, we simply
2379 * here's the matrix:
2382 * +--------+--------+
2384 * 0 | create | connect|
2386 * Forwarding +--------+--------+
2388 * 1 | create | pass |
2390 * +--------+--------+
2394 if (http->ssl && connect_port_is_forbidden(csp))
2396 const char *acceptable_connect_ports =
2397 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
2398 assert(NULL != acceptable_connect_ports);
2399 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
2400 "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
2401 csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
2402 csp->action->flags |= ACTION_BLOCK;
2408 freez(csp->headers->first->str);
2409 build_request_line(csp, fwd, &csp->headers->first->str);
2412 hdr = list_to_text(csp->headers);
2415 /* FIXME Should handle error properly */
2416 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2420 * We have a request. Check if one of the crunchers wants it.
2422 if (crunch_response_triggered(csp, crunchers_all))
2425 * Yes. The client got the crunch response
2426 * and we are done here after cleaning up.
2429 list_remove_all(csp->headers);
2435 * The headers can't be removed earlier because
2436 * they were still needed for the referrer check
2437 * in case of CGI crunches.
2439 * XXX: Would it be worth to move the referrer check
2440 * into client_referrer() and set a flag if it's trusted?
2442 list_remove_all(csp->headers);
2444 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2446 if (fwd->forward_host)
2448 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2449 fwd->forward_host, fwd->forward_port, http->hostport);
2453 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2456 /* here we connect to the server, gateway, or the forwarder */
2458 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
2459 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2461 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
2462 forwarded_connect_retries, http->hostport);
2465 if (csp->sfd == JB_INVALID_SOCKET)
2467 if (fwd->type != SOCKS_NONE)
2470 rsp = error_response(csp, "forwarding-failed", errno);
2472 else if (errno == EINVAL)
2474 rsp = error_response(csp, "no-such-domain", errno);
2478 rsp = error_response(csp, "connect-failed", errno);
2479 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2483 /* Write the answer to the client */
2486 send_crunch_response(csp, rsp);
2493 if (fwd->forward_host || (http->ssl == 0))
2496 * Write the client's (modified) header to the server
2497 * (along with anything else that may be in the buffer)
2499 if (write_socket(csp->sfd, hdr, strlen(hdr))
2500 || (flush_socket(csp->sfd, csp->iob) < 0))
2502 log_error(LOG_LEVEL_CONNECT,
2503 "write header to: %s failed: %E", http->hostport);
2505 rsp = error_response(csp, "connect-failed", errno);
2508 send_crunch_response(csp, rsp);
2518 * We're running an SSL tunnel and we're not forwarding,
2519 * so just send the "connect succeeded" message to the
2520 * client, flush the rest, and get out of the way.
2522 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
2530 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2532 /* we're finished with the client's header */
2535 maxfd = (csp->cfd > csp->sfd) ? csp->cfd : csp->sfd;
2537 /* pass data between the client and server
2538 * until one or the other shuts down the connection.
2547 * FD_ZERO here seems to point to an errant macro which crashes.
2548 * So do this by hand for now...
2550 memset(&rfds,0x00,sizeof(fd_set));
2554 FD_SET(csp->cfd, &rfds);
2555 FD_SET(csp->sfd, &rfds);
2557 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2558 if (server_body && server_response_is_complete(csp, byte_count))
2560 log_error(LOG_LEVEL_CONNECT,
2561 "Done reading from server. Expected content length: %d. "
2562 "Actual content length: %d. Most recently received: %d.",
2563 csp->expected_content_length, byte_count, len);
2566 * XXX: should not jump around,
2567 * chat() is complicated enough already.
2571 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2573 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
2577 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2582 * This is the body of the browser's request,
2583 * just read and write it.
2585 if (FD_ISSET(csp->cfd, &rfds))
2587 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2591 break; /* "game over, man" */
2594 if (write_socket(csp->sfd, buf, (size_t)len))
2596 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2603 * The server wants to talk. It could be the header or the body.
2604 * If `hdr' is null, then it's the header otherwise it's the body.
2605 * FIXME: Does `hdr' really mean `host'? No.
2607 if (FD_ISSET(csp->sfd, &rfds))
2610 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2614 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2616 if (http->ssl && (fwd->forward_host == NULL))
2619 * Just hang up. We already confirmed the client's CONNECT
2620 * request with status code 200 and unencrypted content is
2621 * no longer welcome.
2623 log_error(LOG_LEVEL_ERROR,
2624 "CONNECT already confirmed. Unable to tell the client about the problem.");
2627 else if (byte_count)
2630 * Just hang up. We already transmitted the original headers
2631 * and parts of the original content and therefore missed the
2632 * chance to send an error message (without risking data corruption).
2634 * XXX: we could retry with a fancy range request here.
2636 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2637 "Unable to tell the client about the problem.");
2641 rsp = error_response(csp, "connect-failed", errno);
2644 send_crunch_response(csp, rsp);
2650 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2651 if (csp->flags & CSP_FLAG_CHUNKED)
2653 if ((len > 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2655 /* XXX: this is a temporary hack */
2656 log_error(LOG_LEVEL_CONNECT,
2657 "Looks like we reached the end of the last chunk. "
2658 "We better stop reading.");
2659 csp->expected_content_length = byte_count + (size_t)len;
2660 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2664 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2667 * Add a trailing zero to let be able to use string operations.
2668 * XXX: do we still need this with filter_popups gone?
2673 * Normally, this would indicate that we've read
2674 * as much as the server has sent us and we can
2675 * close the client connection. However, Microsoft
2676 * in its wisdom has released IIS/5 with a bug that
2677 * prevents it from sending the trailing \r\n in
2678 * a 302 redirect header (and possibly other headers).
2679 * To work around this if we've haven't parsed
2680 * a full header we'll append a trailing \r\n
2681 * and see if this now generates a valid one.
2683 * This hack shouldn't have any impacts. If we've
2684 * already transmitted the header or if this is a
2685 * SSL connection, then we won't bother with this
2686 * hack. So we only work on partially received
2687 * headers. If we append a \r\n and this still
2688 * doesn't generate a valid header, then we won't
2689 * transmit anything to the client.
2694 if (server_body || http->ssl)
2697 * If we have been buffering up the document,
2698 * now is the time to apply content modification
2699 * and send the result to the client.
2703 p = execute_content_filter(csp, content_filter);
2705 * If the content filter fails, use the original
2706 * buffer and length.
2707 * (see p != NULL ? p : csp->iob->cur below)
2711 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2714 if (JB_ERR_OK != update_server_headers(csp))
2716 log_error(LOG_LEVEL_FATAL,
2717 "Failed to update server headers. after filtering.");
2720 hdr = list_to_text(csp->headers);
2723 /* FIXME Should handle error properly */
2724 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2727 if (write_socket(csp->cfd, hdr, strlen(hdr))
2728 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
2730 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2740 break; /* "game over, man" */
2744 * This is NOT the body, so
2745 * Let's pretend the server just sent us a blank line.
2747 snprintf(buf, sizeof(buf), "\r\n");
2748 len = (int)strlen(buf);
2751 * Now, let the normal header parsing algorithm below do its
2752 * job. If it fails, we'll exit instead of continuing.
2759 * If this is an SSL connection or we're in the body
2760 * of the server document, just write it to the client,
2761 * unless we need to buffer the body for later content-filtering
2763 if (server_body || http->ssl)
2768 * If there is no memory left for buffering the content, or the buffer limit
2769 * has been reached, switch to non-filtering mode, i.e. make & write the
2770 * header, flush the iob and buf, and get out of the way.
2772 if (add_to_iob(csp, buf, len))
2777 log_error(LOG_LEVEL_INFO,
2778 "Flushing header and buffers. Stepping back from filtering.");
2780 hdr = list_to_text(csp->headers);
2784 * Memory is too tight to even generate the header.
2785 * Send our static "Out-of-memory" page.
2787 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2788 rsp = cgi_error_memory();
2789 send_crunch_response(csp, rsp);
2792 hdrlen = strlen(hdr);
2794 if (write_socket(csp->cfd, hdr, hdrlen)
2795 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
2796 || (write_socket(csp->cfd, buf, (size_t)len)))
2798 log_error(LOG_LEVEL_CONNECT,
2799 "Flush header and buffers to client failed: %E");
2805 * Reset the byte_count to the amount of bytes
2806 * we just flushed. len will be added a few lines below,
2807 * hdrlen doesn't matter for LOG_LEVEL_CLF.
2809 byte_count = (size_t)flushed;
2811 content_filter = NULL;
2817 if (write_socket(csp->cfd, buf, (size_t)len))
2819 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2823 byte_count += (size_t)len;
2828 const char *header_start;
2830 * We're still looking for the end of the server's header.
2831 * Buffer up the data we just read. If that fails, there's
2832 * little we can do but send our static out-of-memory page.
2834 if (add_to_iob(csp, buf, len))
2836 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2837 rsp = cgi_error_memory();
2838 send_crunch_response(csp, rsp);
2842 header_start = csp->iob->cur;
2844 /* Convert iob into something sed() can digest */
2845 if (JB_ERR_PARSE == get_server_headers(csp))
2850 * Well, we tried our MS IIS/5 hack and it didn't work.
2851 * The header is incomplete and there isn't anything
2852 * we can do about it.
2854 log_error(LOG_LEVEL_INFO,
2855 "MS IIS5 hack didn't produce valid headers.");
2861 * Since we have to wait for more from the server before
2862 * we can parse the headers we just continue here.
2868 /* Did we actually get anything? */
2869 if (NULL == csp->headers->first)
2871 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
2872 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2873 write_socket(csp->cfd, NO_SERVER_DATA_RESPONSE, strlen(NO_SERVER_DATA_RESPONSE));
2874 free_http_request(http);
2878 assert(csp->headers->first->str);
2880 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
2881 strncmpic(csp->headers->first->str, "ICY", 3))
2884 * It doesn't look like a HTTP (or Shoutcast) response:
2885 * tell the client and log the problem.
2887 if (strlen(csp->headers->first->str) > 30)
2889 csp->headers->first->str[30] = '\0';
2891 log_error(LOG_LEVEL_ERROR,
2892 "Invalid server or forwarder response. Starts with: %s",
2893 csp->headers->first->str);
2894 log_error(LOG_LEVEL_CLF,
2895 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2896 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2897 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2898 free_http_request(http);
2903 * We have now received the entire server header,
2904 * filter it and send the result to the client
2906 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
2908 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
2910 hdr = list_to_text(csp->headers);
2913 /* FIXME Should handle error properly */
2914 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2917 if (crunch_response_triggered(csp, crunchers_light))
2920 * One of the tags created by a server-header
2921 * tagger triggered a crunch. We already
2922 * delivered the crunch response to the client
2923 * and are done here after cleaning up.
2928 /* Buffer and pcrs filter this if appropriate. */
2930 if (!http->ssl) /* We talk plaintext */
2932 content_filter = get_filter_function(csp);
2935 * Only write if we're not buffering for content modification
2937 if (!content_filter)
2940 * Write the server's (modified) header to
2941 * the client (along with anything else that
2942 * may be in the buffer)
2945 if (write_socket(csp->cfd, hdr, strlen(hdr))
2946 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
2948 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
2951 * The write failed, so don't bother mentioning it
2952 * to the client... it probably can't hear us anyway.
2958 byte_count += (size_t)len;
2963 * XXX: the header lenght should probably
2964 * be calculated by get_server_headers().
2966 int header_length = csp->iob->cur - header_start;
2967 assert(csp->iob->cur > header_start);
2968 byte_count += (size_t)(len - header_length);
2971 /* we're finished with the server's header */
2977 * If this was a MS IIS/5 hack then it means the server
2978 * has already closed the connection. Nothing more to read.
2983 log_error(LOG_LEVEL_INFO,
2984 "Closed server connection detected with MS IIS5 hack enabled.");
2991 * If we reach this point, the server socket is tainted
2992 * (most likely because we didn't read everything the
2993 * server sent us) and reusing it would lead to garbage.
2995 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
2997 log_error(LOG_LEVEL_CONNECT, "Unsetting keep-alive flag.");
2998 csp->flags &= ~CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE;
3003 if (csp->content_length == 0)
3006 * If Privoxy didn't recalculate the Content-Lenght,
3007 * byte_count is still correct.
3009 csp->content_length = byte_count;
3012 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
3013 csp->ip_addr_str, http->ocmd, csp->content_length);
3017 /*********************************************************************
3021 * Description : This is little more than chat. We only "serve" to
3022 * to close any socket that chat may have opened.
3025 * 1 : csp = Current client state (buffers, headers, etc...)
3029 *********************************************************************/
3031 void serve(struct client_state *csp)
3032 #else /* ifndef AMIGA */
3033 static void serve(struct client_state *csp)
3034 #endif /* def AMIGA */
3037 close_socket(csp->cfd);
3039 if (csp->sfd != JB_INVALID_SOCKET)
3041 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3042 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
3044 remember_connection(csp->sfd, csp->http, forward_url(csp, csp->http));
3048 forget_connection(csp->sfd);
3049 close_socket(csp->sfd);
3052 close_socket(csp->sfd);
3053 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3056 csp->flags &= ~CSP_FLAG_ACTIVE;
3062 /*********************************************************************
3064 * Function : server_thread
3066 * Description : We only exist to call `serve' in a threaded environment.
3069 * 1 : data = Current client state (buffers, headers, etc...)
3071 * Returns : Always 0.
3073 *********************************************************************/
3074 static int32 server_thread(void *data)
3076 serve((struct client_state *) data);
3083 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3084 /*********************************************************************
3088 * Description : Print usage info & exit.
3090 * Parameters : Pointer to argv[0] for identifying ourselves
3094 *********************************************************************/
3095 static void usage(const char *myname)
3097 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
3101 #endif /* defined(unix) */
3104 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
3105 #endif /* defined(unix) */
3106 "[--version] [configfile]\n"
3107 "Aborting\n", myname);
3112 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
3115 #ifdef MUTEX_LOCKS_AVAILABLE
3116 /*********************************************************************
3118 * Function : privoxy_mutex_lock
3120 * Description : Locks a mutex.
3123 * 1 : mutex = The mutex to lock.
3125 * Returns : Void. May exit in case of errors.
3127 *********************************************************************/
3128 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
3130 #ifdef FEATURE_PTHREAD
3131 int err = pthread_mutex_lock(mutex);
3134 if (mutex != &log_mutex)
3136 log_error(LOG_LEVEL_FATAL,
3137 "Mutex locking failed: %s.\n", strerror(err));
3142 EnterCriticalSection(mutex);
3143 #endif /* def FEATURE_PTHREAD */
3147 /*********************************************************************
3149 * Function : privoxy_mutex_unlock
3151 * Description : Unlocks a mutex.
3154 * 1 : mutex = The mutex to unlock.
3156 * Returns : Void. May exit in case of errors.
3158 *********************************************************************/
3159 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
3161 #ifdef FEATURE_PTHREAD
3162 int err = pthread_mutex_unlock(mutex);
3165 if (mutex != &log_mutex)
3167 log_error(LOG_LEVEL_FATAL,
3168 "Mutex unlocking failed: %s.\n", strerror(err));
3173 LeaveCriticalSection(mutex);
3174 #endif /* def FEATURE_PTHREAD */
3178 /*********************************************************************
3180 * Function : privoxy_mutex_init
3182 * Description : Prepares a mutex.
3185 * 1 : mutex = The mutex to initialize.
3187 * Returns : Void. May exit in case of errors.
3189 *********************************************************************/
3190 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
3192 #ifdef FEATURE_PTHREAD
3193 int err = pthread_mutex_init(mutex, 0);
3196 printf("Fatal error. Mutex initialization failed: %s.\n",
3201 InitializeCriticalSection(mutex);
3202 #endif /* def FEATURE_PTHREAD */
3204 #endif /* def MUTEX_LOCKS_AVAILABLE */
3206 /*********************************************************************
3208 * Function : initialize_mutexes
3210 * Description : Prepares mutexes if mutex support is available.
3214 * Returns : Void, exits in case of errors.
3216 *********************************************************************/
3217 static void initialize_mutexes(void)
3219 #ifdef MUTEX_LOCKS_AVAILABLE
3221 * Prepare global mutex semaphores
3223 privoxy_mutex_init(&log_mutex);
3224 privoxy_mutex_init(&log_init_mutex);
3225 privoxy_mutex_init(&connection_reuse_mutex);
3228 * XXX: The assumptions below are a bit naive
3229 * and can cause locks that aren't necessary.
3231 * For example older FreeBSD versions (< 6.x?)
3232 * have no gethostbyname_r, but gethostbyname is
3235 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
3236 privoxy_mutex_init(&resolver_mutex);
3237 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
3239 * XXX: should we use a single mutex for
3240 * localtime() and gmtime() as well?
3242 #ifndef HAVE_GMTIME_R
3243 privoxy_mutex_init(&gmtime_mutex);
3244 #endif /* ndef HAVE_GMTIME_R */
3246 #ifndef HAVE_LOCALTIME_R
3247 privoxy_mutex_init(&localtime_mutex);
3248 #endif /* ndef HAVE_GMTIME_R */
3251 privoxy_mutex_init(&rand_mutex);
3252 #endif /* ndef HAVE_RANDOM */
3253 #endif /* def MUTEX_LOCKS_AVAILABLE */
3257 /*********************************************************************
3261 * Description : Load the config file and start the listen loop.
3262 * This function is a lot more *sane* with the `load_config'
3263 * and `listen_loop' functions; although it stills does
3264 * a *little* too much for my taste.
3267 * 1 : argc = Number of parameters (including $0).
3268 * 2 : argv = Array of (char *)'s to the parameters.
3270 * Returns : 1 if : can't open config file, unrecognized directive,
3271 * stats requested in multi-thread mode, can't open the
3272 * log file, can't open the jar file, listen port is invalid,
3273 * any load fails, and can't bind port.
3275 * Else main never returns, the process must be signaled
3276 * to terminate execution. Or, on Windows, use the
3277 * "File", "Exit" menu option.
3279 *********************************************************************/
3281 int real_main(int argc, const char *argv[])
3283 int main(int argc, const char *argv[])
3287 unsigned int random_seed;
3289 struct passwd *pw = NULL;
3290 struct group *grp = NULL;
3293 char *pre_chroot_nslookup_to_load_resolver = NULL;
3300 #if !defined(_WIN32)
3308 * Parse the command line arguments
3310 * XXX: simply printing usage information in case of
3311 * invalid arguments isn't particularly user friendly.
3313 while (++argc_pos < argc)
3316 /* Check to see if the service must be installed or uninstalled */
3317 if (strncmp(argv[argc_pos], "--install", 9) == 0)
3319 const char *pName = argv[argc_pos] + 9;
3322 exit( (install_service(pName)) ? 0 : 1 );
3324 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
3326 const char *pName = argv[argc_pos] + 11;
3329 exit((uninstall_service(pName)) ? 0 : 1);
3331 else if (strcmp(argv[argc_pos], "--service" ) == 0)
3333 bRunAsService = TRUE;
3334 w32_set_service_cwd();
3335 atexit(w32_service_exit_notify);
3338 #endif /* defined(_WIN32) */
3341 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3343 if (strcmp(argv[argc_pos], "--help") == 0)
3348 else if(strcmp(argv[argc_pos], "--version") == 0)
3350 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
3356 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
3361 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
3363 if (++argc_pos == argc) usage(argv[0]);
3364 pidfile = strdup(argv[argc_pos]);
3367 else if (strcmp(argv[argc_pos], "--user" ) == 0)
3369 if (++argc_pos == argc) usage(argv[argc_pos]);
3371 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
3374 if (NULL == (grp = getgrnam(p)))
3376 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
3380 if (NULL == (pw = getpwnam(argv[argc_pos])))
3382 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
3385 if (p != NULL) *--p = '\0';
3388 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
3390 if (++argc_pos == argc) usage(argv[0]);
3391 pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
3394 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
3398 #endif /* defined(unix) */
3400 else if (argc_pos + 1 != argc)
3403 * This is neither the last command line
3404 * option, nor was it recognized before,
3405 * therefore it must be invalid.
3411 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3413 configfile = argv[argc_pos];
3416 } /* -END- while (more arguments) */
3419 if ( *configfile != '/' )
3421 char cwd[BUFFER_SIZE];
3423 size_t abs_file_size;
3425 /* make config-filename absolute here */
3426 if (NULL == getcwd(cwd, sizeof(cwd)))
3428 perror("failed to get current working directory");
3433 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3434 basedir = strdup(cwd);
3436 if (NULL == basedir ||
3437 NULL == (abs_file = malloc(abs_file_size)))
3439 perror("malloc failed");
3442 strlcpy(abs_file, basedir, abs_file_size);
3443 strlcat(abs_file, "/", abs_file_size );
3444 strlcat(abs_file, configfile, abs_file_size);
3445 configfile = abs_file;
3447 #endif /* defined unix */
3451 clients->next = NULL;
3453 /* XXX: factor out initialising after the next stable release. */
3456 #elif defined(_WIN32)
3460 /* Prepare mutexes if supported and necessary. */
3461 initialize_mutexes();
3463 /* Enable logging until further notice. */
3464 init_log_module(Argv[0]);
3466 random_seed = (unsigned int)time(NULL);
3468 srandom(random_seed);
3471 #endif /* ifdef HAVE_RANDOM */
3474 * Unix signal handling
3476 * Catch the abort, interrupt and terminate signals for a graceful exit
3477 * Catch the hangup signal so the errlog can be reopened.
3478 * Ignore the broken pipe signals (FIXME: Why?)
3480 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3483 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3484 const int ignored_signals[] = { SIGPIPE, 0 };
3486 for (idx = 0; catched_signals[idx] != 0; idx++)
3488 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3489 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3491 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3492 #endif /* ifdef sun */
3494 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3498 for (idx = 0; ignored_signals[idx] != 0; idx++)
3500 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3502 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3507 #else /* ifdef _WIN32 */
3508 # ifdef _WIN_CONSOLE
3510 * We *are* in a windows console app.
3511 * Print a verbose messages about FAQ's and such
3513 printf("%s", win32_blurb);
3514 # endif /* def _WIN_CONSOLE */
3515 #endif /* def _WIN32 */
3518 /* Initialize the CGI subsystem */
3519 cgi_init_error_messages();
3522 * If runnig on unix and without the --nodaemon
3523 * option, become a daemon. I.e. fork, detach
3524 * from tty and get process group leadership
3537 if ( pid < 0 ) /* error */
3542 else if ( pid != 0 ) /* parent */
3547 * must check for errors
3548 * child died due to missing files aso
3551 wpid = waitpid( pid, &status, WNOHANG );
3560 /* Should be more portable, but not as well tested */
3565 #else /* ndef __FreeBSD__ */
3567 #endif /* ndef __FreeBSD__ */
3568 fd = open("/dev/tty", O_RDONLY);
3571 /* no error check here */
3572 ioctl( fd, TIOCNOTTY,0 );
3577 * stderr (fd 2) will be closed later on, when the
3578 * log file has been parsed.
3585 } /* -END- if (!no_daemon) */
3588 * As soon as we have written the PID file, we can switch
3589 * to the user and group ID indicated by the --user option
3595 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3597 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3603 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3605 /* Read the time zone file from /etc before doing chroot. */
3607 if (NULL != pre_chroot_nslookup_to_load_resolver
3608 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3610 /* Initialize resolver library. */
3611 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3613 if (chroot(pw->pw_dir) < 0)
3615 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3619 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3622 if (setuid(pw->pw_uid))
3624 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3628 char putenv_dummy[64];
3630 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3631 if (putenv(putenv_dummy) != 0)
3633 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3636 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3637 if (putenv(putenv_dummy) != 0)
3639 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3645 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3648 #endif /* defined unix */
3651 /* This will be FALSE unless the command line specified --service
3655 /* Yup, so now we must attempt to establish a connection
3656 * with the service dispatcher. This will only work if this
3657 * process was launched by the service control manager to
3658 * actually run as a service. If this isn't the case, i've
3659 * known it take around 30 seconds or so for the call to return.
3662 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3663 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3665 /* Service has run, and at this point is now being stopped, so just return */
3670 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3672 /* An error occurred. Usually it's because --service was wrongly specified
3673 * and we were unable to connect to the Service Control Dispatcher because
3674 * it wasn't expecting us and is therefore not listening.
3676 * For now, just continue below to call the listen_loop function.
3679 #endif /* def _WIN32 */
3689 /*********************************************************************
3691 * Function : bind_port_helper
3693 * Description : Bind the listen port. Handles logging, and aborts
3697 * 1 : config = Privoxy configuration. Specifies port
3700 * Returns : Port that was opened.
3702 *********************************************************************/
3703 static jb_socket bind_port_helper(struct configuration_spec * config)
3708 if (config->haddr == NULL)
3710 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3715 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3716 config->hport, config->haddr);
3719 result = bind_port(config->haddr, config->hport, &bfd);
3726 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3727 "There may be another Privoxy or some other "
3728 "proxy running on port %d",
3729 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
3730 config->hport, config->hport);
3733 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3734 "The hostname is not resolvable",
3735 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3738 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
3739 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3742 /* shouldn't get here */
3743 return JB_INVALID_SOCKET;
3746 config->need_bind = 0;
3753 /* Without this simple workaround we get this compiler warning from _beginthread
3754 * warning C4028: formal parameter 1 different from declaration
3756 void w32_service_listen_loop(void *p)
3760 #endif /* def _WIN32 */
3763 /*********************************************************************
3765 * Function : listen_loop
3767 * Description : bind the listen port and enter a "FOREVER" listening loop.
3773 *********************************************************************/
3774 static void listen_loop(void)
3776 struct client_state *csp = NULL;
3778 struct configuration_spec * config;
3780 config = load_config();
3782 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3784 * XXX: Should be relocated once it no
3785 * longer needs to emit log messages.
3787 initialize_reusable_connections();
3788 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3790 bfd = bind_port_helper(config);
3792 #ifdef FEATURE_GRACEFUL_TERMINATION
3793 while (!g_terminate)
3798 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
3799 while (waitpid(-1, NULL, WNOHANG) > 0)
3801 /* zombie children */
3803 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
3806 * Free data that was used by died threads
3812 * Re-open the errlog after HUP signal
3814 if (received_hup_signal)
3816 if (NULL != config->logfile)
3818 init_error_log(Argv[0], config->logfile);
3820 received_hup_signal = 0;
3824 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
3826 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
3830 csp->flags |= CSP_FLAG_ACTIVE;
3831 csp->sfd = JB_INVALID_SOCKET;
3833 csp->config = config = load_config();
3835 if ( config->need_bind )
3838 * Since we were listening to the "old port", we will not see
3839 * a "listen" param change until the next IJB request. So, at
3840 * least 1 more request must be made for us to find the new
3841 * setting. I am simply closing the old socket and binding the
3844 * Which-ever is correct, we will serve 1 more page via the
3845 * old settings. This should probably be a "show-proxy-args"
3846 * request. This should not be a so common of an operation
3847 * that this will hurt people's feelings.
3852 bfd = bind_port_helper(config);
3855 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
3857 if (!accept_connection(csp, bfd))
3859 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
3872 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
3875 #ifdef FEATURE_TOGGLE
3876 if (global_toggle_state)
3877 #endif /* def FEATURE_TOGGLE */
3879 csp->flags |= CSP_FLAG_TOGGLED_ON;
3882 if (run_loader(csp))
3884 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
3885 /* Never get here - LOG_LEVEL_FATAL causes program exit */
3889 if (block_acl(NULL,csp))
3891 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
3892 close_socket(csp->cfd);
3896 #endif /* def FEATURE_ACL */
3898 /* add it to the list of clients */
3899 csp->next = clients->next;
3900 clients->next = csp;
3902 if (config->multi_threaded)
3906 /* this is a switch () statment in the C preprocessor - ugh */
3907 #undef SELECTED_ONE_OPTION
3909 /* Use Pthreads in preference to native code */
3910 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
3911 #define SELECTED_ONE_OPTION
3913 pthread_t the_thread;
3914 pthread_attr_t attrs;
3916 pthread_attr_init(&attrs);
3917 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
3918 errno = pthread_create(&the_thread, &attrs,
3919 (void * (*)(void *))serve, csp);
3920 child_id = errno ? -1 : 0;
3921 pthread_attr_destroy(&attrs);
3925 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
3926 #define SELECTED_ONE_OPTION
3927 child_id = _beginthread(
3928 (void (*)(void *))serve,
3933 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
3934 #define SELECTED_ONE_OPTION
3935 child_id = _beginthread(
3936 (void(* _Optlink)(void*))serve,
3942 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
3943 #define SELECTED_ONE_OPTION
3945 thread_id tid = spawn_thread
3946 (server_thread, "server", B_NORMAL_PRIORITY, csp);
3948 if ((tid >= 0) && (resume_thread(tid) == B_OK))
3950 child_id = (int) tid;
3959 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
3960 #define SELECTED_ONE_OPTION
3961 csp->cfd = ReleaseSocket(csp->cfd, -1);
3964 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3965 NP_Output, Output(),
3966 NP_CloseOutput, FALSE,
3967 NP_Name, (ULONG)"privoxy child",
3971 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3972 NP_Output, Output(),
3973 NP_CloseOutput, FALSE,
3974 NP_Name, (ULONG)"privoxy child",
3975 NP_StackSize, 200*1024,
3981 ((struct Task *)child_id)->tc_UserData = csp;
3982 Signal((struct Task *)child_id, SIGF_SINGLE);
3987 #if !defined(SELECTED_ONE_OPTION)
3990 /* This block is only needed when using fork().
3991 * When using threads, the server thread was
3992 * created and run by the call to _beginthread().
3994 if (child_id == 0) /* child */
3997 #ifdef FEATURE_TOGGLE
3998 int inherited_toggle_state = global_toggle_state;
3999 #endif /* def FEATURE_TOGGLE */
4004 * If we've been toggled or we've blocked the request, tell Mom
4007 #ifdef FEATURE_TOGGLE
4008 if (inherited_toggle_state != global_toggle_state)
4010 rc |= RC_FLAG_TOGGLED;
4012 #endif /* def FEATURE_TOGGLE */
4014 #ifdef FEATURE_STATISTICS
4015 if (csp->flags & CSP_FLAG_REJECTED)
4017 rc |= RC_FLAG_BLOCKED;
4019 #endif /* ndef FEATURE_STATISTICS */
4023 else if (child_id > 0) /* parent */
4025 /* in a fork()'d environment, the parent's
4026 * copy of the client socket and the CSP
4030 #if !defined(_WIN32) && !defined(__CYGWIN__)
4032 wait( &child_status );
4035 * Evaluate child's return code: If the child has
4036 * - been toggled, toggle ourselves
4037 * - blocked its request, bump up the stats counter
4040 #ifdef FEATURE_TOGGLE
4041 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
4043 global_toggle_state = !global_toggle_state;
4045 #endif /* def FEATURE_TOGGLE */
4047 #ifdef FEATURE_STATISTICS
4049 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
4053 #endif /* def FEATURE_STATISTICS */
4055 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
4056 close_socket(csp->cfd);
4057 csp->flags &= ~CSP_FLAG_ACTIVE;
4061 #undef SELECTED_ONE_OPTION
4062 /* end of cpp switch () */
4064 if (child_id < 0) /* failed */
4066 char buf[BUFFER_SIZE];
4068 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
4070 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
4072 write_socket(csp->cfd, buf, strlen(buf));
4073 close_socket(csp->cfd);
4074 csp->flags &= ~CSP_FLAG_ACTIVE;
4085 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
4087 /* Clean up. Aim: free all memory (no leaks) */
4088 #ifdef FEATURE_GRACEFUL_TERMINATION
4090 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
4092 unload_current_config_file();
4093 unload_current_actions_file();
4094 unload_current_re_filterfile();
4095 #ifdef FEATURE_TRUST
4096 unload_current_trust_file();
4099 if (config->multi_threaded)
4106 } while ((clients->next != NULL) && (--i > 0));
4110 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
4121 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
4122 /* Cleanup - remove taskbar icon etc. */
4127 #endif /* FEATURE_GRACEFUL_TERMINATION */