1 const char jcc_rcs[] = "$Id: jcc.c,v 1.197 2008/10/20 17:02:40 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 1.197 2008/10/20 17:02:40 fabiankeil
37 * If SIGHUP is received while we aren't running in daemon
38 * mode, calling init_error_log() would be a mistake.
40 * Revision 1.196 2008/10/16 09:16:41 fabiankeil
41 * - Fix two gcc44 conversion warnings.
42 * - Don't bother logging the last five bytes
45 * Revision 1.195 2008/10/13 16:04:37 fabiankeil
46 * Make sure we don't try to reuse tainted server sockets.
48 * Revision 1.194 2008/10/12 18:35:18 fabiankeil
49 * The last commit was a bit too ambitious, apparently the content
50 * length adjustment is only necessary if we aren't buffering.
52 * Revision 1.193 2008/10/12 15:57:35 fabiankeil
53 * Fix content length calculation if we read headers
54 * and the start of the body at once. Now that we have
55 * FEATURE_CONNECTION_KEEP_ALIVE, it actually matters.
57 * Revision 1.192 2008/10/11 18:19:14 fabiankeil
58 * Even more chat() cosmetics.
60 * Revision 1.191 2008/10/11 18:00:14 fabiankeil
61 * Reformat some comments in chat().
63 * Revision 1.190 2008/10/11 14:58:00 fabiankeil
64 * In case of chunk-encoded content, stop reading if
65 * the buffer looks like it ends with the last chunk.
67 * Revision 1.189 2008/10/11 09:53:00 fabiankeil
68 * Let server_response_is_complete() deal properly with
69 * content that is neither buffered nor read all at once.
71 * Revision 1.188 2008/10/09 18:21:41 fabiankeil
72 * Flush work-in-progress changes to keep outgoing connections
73 * alive where possible. Incomplete and mostly #ifdef'd out.
75 * Revision 1.187 2008/09/07 12:35:05 fabiankeil
76 * Add mutex lock support for _WIN32.
78 * Revision 1.186 2008/09/04 08:13:58 fabiankeil
79 * Prepare for critical sections on Windows by adding a
80 * layer of indirection before the pthread mutex functions.
82 * Revision 1.185 2008/08/30 12:03:07 fabiankeil
83 * Remove FEATURE_COOKIE_JAR.
85 * Revision 1.184 2008/08/22 15:34:45 fabiankeil
86 * - Silence LLVM/Clang complaint.
87 * - Make received_hup_signal static.
88 * - Hide definitions for basedir, pidfile and received_hup_signal
89 * from __EMX__ as they only seem to be used in case of #ifdef unix.
91 * Revision 1.183 2008/08/21 07:09:35 fabiankeil
92 * Accept Shoutcast responses again. Problem reported
93 * and fix suggested by Stefan in #2062860.
95 * Revision 1.182 2008/06/27 11:13:56 fabiankeil
96 * Fix possible NULL-pointer dereference reported
97 * by din_a4 in #2003937. Pointy hat to me.
99 * Revision 1.181 2008/05/21 15:47:15 fabiankeil
100 * Streamline sed()'s prototype and declare
101 * the header parse and add structures static.
103 * Revision 1.180 2008/05/21 15:26:32 fabiankeil
104 * - Mark csp as immutable for send_crunch_response().
105 * - Fix comment spelling.
107 * Revision 1.179 2008/05/20 20:13:32 fabiankeil
108 * Factor update_server_headers() out of sed(), ditch the
109 * first_run hack and make server_patterns_light static.
111 * Revision 1.178 2008/05/10 13:23:38 fabiankeil
112 * Don't provide get_header() with the whole client state
113 * structure when it only needs access to csp->iob.
115 * Revision 1.177 2008/05/10 11:51:12 fabiankeil
116 * Make the "read the rest of the headers" loop a bit more readable.
118 * Revision 1.176 2008/05/10 11:37:57 fabiankeil
119 * - Instead of logging when the IIS5 hack is enabled, log when it fails.
120 * - Remove useless comment.
122 * Revision 1.175 2008/05/09 18:53:59 fabiankeil
123 * Fix comment grammar.
125 * Revision 1.174 2008/05/07 18:05:53 fabiankeil
126 * Remove the pointless buffer in client_protocol_is_unsupported().
128 * Revision 1.173 2008/05/06 15:09:00 fabiankeil
129 * Least-effort fix for bug #1821930 (reported by Lee):
130 * If the response doesn't look like HTTP,
131 * tell the client and log the problem.
133 * Revision 1.172 2008/04/16 16:38:21 fabiankeil
134 * Don't pass the whole csp structure to flush_socket()
135 * when it only needs a file descriptor and a buffer.
137 * Revision 1.171 2008/03/27 18:27:25 fabiankeil
138 * Remove kill-popups action.
140 * Revision 1.170 2008/03/06 16:33:46 fabiankeil
141 * If limit-connect isn't used, don't limit CONNECT requests to port 443.
143 * Revision 1.169 2008/03/04 18:30:39 fabiankeil
144 * Remove the treat-forbidden-connects-like-blocks action. We now
145 * use the "blocked" page for forbidden CONNECT requests by default.
147 * Revision 1.168 2008/03/02 12:25:25 fabiankeil
148 * Also use shiny new connect_port_is_forbidden() in jcc.c.
150 * Revision 1.167 2008/02/23 16:57:12 fabiankeil
151 * Rename url_actions() to get_url_actions() and let it
152 * use the standard parameter ordering.
154 * Revision 1.166 2008/02/23 16:33:43 fabiankeil
155 * Let forward_url() use the standard parameter ordering
156 * and mark its second parameter immutable.
158 * Revision 1.165 2008/02/02 19:36:56 fabiankeil
159 * Remove the "Listening ... for local connections only" log message.
160 * Whether or not remote connections are able to reach Privoxy is up
161 * to the operating system.
163 * Revision 1.164 2007/12/16 18:32:46 fabiankeil
164 * Prevent the log messages for CONNECT requests to unacceptable
165 * ports from printing the limit-connect argument as [null] if
166 * limit-connect hasn't been explicitly enabled.
168 * Revision 1.163 2007/12/13 01:47:11 david__schmidt
169 * Make sure all console-mode apps get a usage() instance
171 * Revision 1.162 2007/12/06 17:54:57 fabiankeil
172 * Reword NO_SERVER_DATA_RESPONSE to make it harder
173 * to misunderstand what the message is all about.
175 * Revision 1.161 2007/12/04 19:44:22 fabiankeil
176 * Unbreak trustfile which previously didn't work without
177 * FEATURE_TOGGLE. Fixes BR#1843585, reported by Lee.
179 * Revision 1.160 2007/11/29 18:00:29 fabiankeil
180 * Plug memory leak. Spotted by Valgrind, triggered by
181 * Privoxy-Regression-Test feeding proxyfuzz.py.
183 * Revision 1.159 2007/11/24 14:34:09 fabiankeil
184 * In the HTTP snipplets, refer to the client as client.
186 * Revision 1.158 2007/11/11 16:44:17 fabiankeil
187 * Emit a log message when activating the MS IIS5 hack.
189 * Revision 1.157 2007/11/03 17:34:49 fabiankeil
190 * Log the "weak randomization factor" warning only
191 * once for mingw32 and provide some more details.
193 * Revision 1.156 2007/11/01 18:20:58 fabiankeil
194 * Initialize log module after initializing mutexes, future
195 * deadlocks in that code should now work cross-platform.
197 * Revision 1.155 2007/10/23 20:12:45 fabiankeil
198 * Fix first CSUCCEED line to end in \r\n as required by RFC1945.
199 * Reported by Bert van Leeuwen in BR#1818808.
201 * Revision 1.154 2007/10/19 17:00:08 fabiankeil
202 * Downgrade "Flushing header and buffers" message to LOG_LEVEL_INFO.
204 * Revision 1.153 2007/10/14 14:12:41 fabiankeil
205 * When in daemon mode, close stderr after the configuration file has been
206 * parsed the first time. If logfile isn't set, stop logging. Fixes BR#897436.
208 * Revision 1.152 2007/10/04 18:03:34 fabiankeil
209 * - Fix a crash when parsing invalid requests whose first header
210 * is rejected by get_header(). Regression (re?)introduced
211 * in r1.143 by yours truly.
212 * - Move ACTION_VANILLA_WAFER handling into parsers.c's
213 * client_cookie_adder() to make sure send-vanilla-wafer can be
214 * controlled through tags (and thus regression-tested).
216 * Revision 1.151 2007/09/29 10:21:16 fabiankeil
217 * - Move get_filter_function() from jcc.c to filters.c
218 * so the filter functions can be static.
219 * - Don't bother filtering body-less responses.
221 * Revision 1.150 2007/09/28 16:39:29 fabiankeil
222 * Execute content filters through execute_content_filter().
224 * Revision 1.149 2007/09/04 15:08:48 fabiankeil
225 * Initialize req to NULL to make sure it's defined if the
226 * first read_socket() call fails. Reported by icmp30.
228 * Revision 1.148 2007/08/26 16:47:13 fabiankeil
229 * Add Stephen Gildea's --pre-chroot-nslookup patch [#1276666],
230 * extensive comments moved to user manual.
232 * Revision 1.147 2007/08/25 14:42:40 fabiankeil
233 * Don't crash if a broken header filter wiped out the request line.
235 * Revision 1.146 2007/08/20 17:09:32 fabiankeil
236 * Fix byte_count calculation in case of flushes
237 * and don't parse the server headers a second time.
239 * Revision 1.145 2007/08/19 13:13:31 fabiankeil
240 * - If there's a connection problem after we already forwarded
241 * parts of the original content, just hang up. Fixes BR#1776724.
242 * - Fix warnings about unused code on mingw32.
243 * - In case of flushes, calculate the byte count
244 * less incorrectly (I think).
246 * Revision 1.144 2007/08/11 14:43:22 fabiankeil
247 * Add some more prototypes for static functions.
249 * Revision 1.143 2007/08/05 13:58:19 fabiankeil
250 * Comment out request_contains_null_bytes() until it's used again.
252 * Revision 1.142 2007/08/05 13:50:26 fabiankeil
253 * #1763173 from Stefan Huehner: s@const static@static const@
254 * and declare some more functions static.
256 * Revision 1.141 2007/08/04 09:56:23 fabiankeil
257 * - Log rejected CONNECT requests with LOG_LEVEL_INFO
258 * and explain why they were rejected in the first place.
259 * - Fix the LOG_LEVEL_CLF message for crunches of unallowed
260 * CONNECT requests. The request line was missing.
261 * - Add two more XXX reminders as we don't have enough already.
263 * Revision 1.140 2007/07/21 11:51:36 fabiankeil
264 * As Hal noticed, checking dispatch_cgi() as the last cruncher
265 * looks like a bug if CGI requests are blocked unintentionally,
266 * so don't do it unless the user enabled the new config option
267 * "allow-cgi-request-crunching".
269 * Revision 1.139 2007/07/14 07:46:41 fabiankeil
270 * - Allow to rewrite the request destination behind the client's back.
271 * - Turn the weird-looking unconditional for loop that
272 * reads the client request into a conditional while loop.
273 * Move the stuff that only runs once out of the loop.
274 * - Move parts of chat(), server_content_type() and the
275 * necessary stuff to fix BR#1750917 into get_filter_function().
277 * Revision 1.138 2007/06/03 18:45:18 fabiankeil
278 * Temporary workaround for BR#1730105.
280 * Revision 1.137 2007/06/01 18:16:36 fabiankeil
281 * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
282 * deadlocks and crashes on OpenBSD and possibly other OS with neither
283 * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
284 * Thanks to Ralf Horstmann for report and solution.
286 * Revision 1.136 2007/06/01 16:41:11 fabiankeil
287 * Add forward-override{} to change the forwarding settings through
288 * action sections. This is mainly interesting to forward different
289 * clients differently (for example based on User-Agent or request
292 * Revision 1.135 2007/05/24 17:03:50 fabiankeil
293 * - Let usage() mention the --chroot parameter.
294 * - Use read_socket() consistently and always leave
295 * the last buffer byte alone, even in cases where
296 * null termination (currently) doesn't matter.
298 * Revision 1.134 2007/05/16 14:59:46 fabiankeil
299 * - Fix config file loading on Unix if no config file is specified.
300 * Since r1.97 Privoxy would always interpret the last argument as
301 * config file, even if it's a valid command line option.
302 * - Abort in case of unrecognized command line options. Closes #1719696.
303 * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
304 * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
306 * Revision 1.133 2007/05/04 11:23:19 fabiankeil
307 * - Don't rerun crunchers that only depend on the request URL.
308 * - Don't count redirects and CGI requests as "blocked requests".
310 * Revision 1.132 2007/04/25 15:15:17 fabiankeil
311 * Support crunching based on tags created by server-header taggers.
313 * Revision 1.131 2007/04/22 13:24:50 fabiankeil
314 * Make HTTP snippets static (again). Add a Content-Type for those
315 * with content so the browser doesn't guess it based on the URL.
317 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
318 * Move crunching and request line rebuilding out of chat().
320 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
321 * Introduce tags as alternative way to specify which
322 * actions apply to a request. At the moment tags can be
323 * created based on client and server headers.
325 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
326 * Don't CLF-log CONNECT requests twice.
328 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
329 * Log the source address for ACL-related connection drops.
331 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
332 * New config option: enforce-blocks.
334 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
335 * - Move null byte check into separate function.
336 * - Don't confuse the client with error pages
337 * if a CONNECT request was already confirmed.
339 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
340 * Speed up NULL byte escaping and only log the complete
341 * NULL byte requests with header debugging enabled.
343 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
344 * Answer requests that contain NULL bytes with
345 * a custom response instead of waiting for more
346 * data until the client eventually hangs up.
348 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
349 * - Move delivery and logging of crunched responses
350 * from chat() into send_crunch_response().
351 * - Display the reason for generating http_responses.
352 * - Log the content length for LOG_LEVEL_CLF correctly
353 * (still incorrect for some fixed responses).
354 * - Reword an incorrect comment about
355 * treat-forbidden-connects-like-blocks violating
357 * - Add some log messages.
359 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
360 * Move mutex initialization into separate
361 * function and exit in case of errors.
363 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
364 * - Start to reduce chat()'s line count and move
365 * parts of it into separate functions.
366 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
368 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
369 * - Add Proxy-Agent header to HTTP snippets that are
370 * supposed to reach HTTP clients only.
371 * - Made a few CONNECT log messages more descriptive.
372 * - Catch completely empty server responses (as seen
373 * with Tor's fake ".noconnect" top level domain).
374 * - Use shiny new "forwarding-failed" template for socks errors.
376 * Revision 1.118 2007/01/07 07:43:43 joergs
377 * AmigaOS4 support added.
379 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
380 * Added config option accept-intercepted-requests
381 * and disabled it by default.
383 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
384 * Reverted parts of my last commit
385 * to keep error handling working.
387 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
388 * Fixed gcc43 conversion warnings.
390 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
391 * Fix -pedantic ISO C warning about converting
392 * from function pointer to object pointer.
394 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
395 * Silence compiler warning I introduced with my last commit.
397 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
398 * Mutex protect rand() if POSIX threading
399 * is used, warn the user if that's not possible
400 * and stop using it on _WIN32 where it could
403 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
404 * Don't prevent core dumps by catching SIGABRT.
405 * It's rude and makes debugging unreasonable painful.
407 * Revision 1.110 2006/12/13 14:52:53 etresoft
408 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
410 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
411 * Privoxy is now able to run as intercepting
412 * proxy in combination with any packet filter
413 * that does the port redirection. The destination
414 * is extracted from the "Host:" header which
415 * should be available for nearly all requests.
417 * Moved HTTP snipplets into jcc.c.
418 * Added error message for gopher proxy requests.
420 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
421 * Only unlink the pidfile if it's actually used.
423 * Change order of interception checks to make
424 * it possible to block or redirect requests for
427 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
428 * Make pthread mutex locking more generic. Instead of
429 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
430 * and use mutex locking unless there is an _r function
431 * available. Better safe than sorry.
433 * Fixes "./configure --disable-pthread" and should result
434 * in less threading-related problems on pthread-using platforms,
435 * but it still doesn't fix BR#1122404.
437 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
438 * Move pthread.h inclusion from jcc.c to jcc.h.
439 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
441 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
442 * Don't exit after receiving the second SIGHUP on Solaris.
444 * Fixes BR 1052235, but the same problem may exist on other
445 * systems. Once 3.0.6 is out we should use sigset()
446 * where available and see if it breaks anything.
448 * Revision 1.104 2006/09/23 13:26:38 roro
449 * Replace TABs by spaces in source code.
451 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
452 * Fix +redirect{}. Didn't work with -fast-redirects.
454 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
455 * Respond with 400 and a short text message
456 * if the client tries to use Privoxy as FTP proxy.
458 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
459 * Make number of retries in case of forwarded-connect problems
460 * a config file option (forwarded-connect-retries) and use 0 as
463 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
464 * Set random(3) seed.
466 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
467 * Follow the OpenBSD port's lead and protect the resolve
468 * functions on OpenBSD as well.
470 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
471 * --user fix. Only use the user as group if no group is specified.
472 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
474 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
475 * Windows service (re-)integration
479 * --install[:service_name]
480 * --uninstall[:service_name]
483 * They work as follows:
484 * --install will create a service for you and then terminate.
485 * By default the service name will be "privoxy" (without the quotes).
486 * However you can run multiple services if you wish, just by adding
487 * a colon and then a name (no spaces).
489 * --uninstall follows the exact same rules a --install.
491 * --service is used when the program is executed by the service
492 * control manager, and in normal circumstances would never be
493 * used as a command line argument.
495 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
496 * Windows service integration
498 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
499 * Incorporate Fabian Keil's patch work:
500 http://www.fabiankeil.de/sourcecode/privoxy/
502 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
503 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
504 * with what was really the latest development (the v_3_0_branch branch)
506 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
507 * Thanks to Jindrich Makovicka for a race condition fix for the log
508 * file. The race condition remains for non-pthread implementations.
509 * Reference patch #1175720.
511 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
512 * Add the ability to check jpeg images for invalid
513 * lengths of comment blocks. Defensive strategy
514 * against the exploit:
515 * Microsoft Security Bulletin MS04-028
516 * Buffer Overrun in JPEG Processing (GDI+) Could
517 * Allow Code Execution (833987)
518 * Enabled with +inspect-jpegs in actions files.
520 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
521 * - Fixed usage info for non-unix platforms
522 * - Fixed small cmdline parsing bug
524 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
525 * Diagnostics: Now preserve the returncode of pthread_create
526 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
528 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
529 * No longer ignore SIGCHLD. Fixes bug #769381
531 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
532 * Close jarfile on graceful exit, remove stray line
534 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
535 * Cosmetics: Killed a warning, a typo and an allocation left at exit
537 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
538 * No longer rely on non-POSIX.1 extensions of getcwd().
541 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
542 * Replaced setenv() by posix-compliant putenv()
543 * Thanks to Neil McCalden (nmcc AT users.sf.net).
545 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
546 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
548 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
549 * Clean-up and extension of improvements for forked mode:
550 * - Child's return code now consists of flags RC_FLAG_*
551 * - Reporting toggle to parent now properly #ifdef'ed
552 * - Children now report blocking to parent. This enables
553 * statistics in forked mode
555 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
556 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
557 * Children now report having been toggled through _exit(17), parents
558 * watch for that code and toggle themselves if found.
560 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
561 * Wrapping all *_r functions (the non-_r versions of them) with
562 * mutex semaphores for OSX. Hopefully this will take care of all
563 * of those pesky crash reports.
565 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
566 * Fixed two mostly harmless mem leaks
568 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
569 * Fix: Head of global clients list now initialized to NULL
571 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
572 * Added basic support for OPTIONS and TRACE HTTP methods:
573 * - New interceptor direct_response() added in chat().
574 * - sed() moved to earlier in the process, so that the
575 * Host: header is evaluated before actions and forwarding
578 * Revision 1.92 2002/05/08 16:00:46 oes
579 * Chat's buffer handling:
580 * - Fixed bug with unchecked out-of-mem conditions
581 * while reading client request & server headers
582 * - No longer predict if the buffer limit will be exceeded
583 * in the next read -- check add_to_iob's new
584 * return code. If buffer couldn't be extended
585 * (policy or out-of-mem) while
586 * - reading from client: abort
587 * - reading server headers: send error page
588 * - buffering server body for filter: flush,
589 * and if that fails: send error page
591 * Revision 1.91 2002/04/08 20:35:58 swa
594 * Revision 1.90 2002/04/02 14:57:28 oes
595 * Made sending wafers independent of FEATURE_COOKIE_JAR
597 * Revision 1.89 2002/03/31 17:18:59 jongfoster
598 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
600 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
601 * More compiler warning message maintenance
603 * Revision 1.87 2002/03/26 22:29:54 swa
604 * we have a new homepage!
606 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
607 * Workaround for closing the jarfile before load_config() comes around again
609 * Revision 1.85 2002/03/24 15:23:33 jongfoster
612 * Revision 1.84 2002/03/24 13:25:43 swa
613 * name change related issues
615 * Revision 1.83 2002/03/16 23:54:06 jongfoster
616 * Adding graceful termination feature, to help look for memory leaks.
617 * If you enable this (which, by design, has to be done by hand
618 * editing config.h) and then go to http://i.j.b/die, then the program
619 * will exit cleanly after the *next* request. It should free all the
620 * memory that was used.
622 * Revision 1.82 2002/03/13 00:27:05 jongfoster
625 * Revision 1.81 2002/03/12 01:42:50 oes
626 * Introduced modular filters
628 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
629 * OS/2 port maintenance:
630 * - Fixed EMX build - it had decayed a little
631 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
632 * substituted a memset for now.
634 * Revision 1.79 2002/03/09 20:03:52 jongfoster
635 * - Making various functions return int rather than size_t.
636 * (Undoing a recent change). Since size_t is unsigned on
637 * Windows, functions like read_socket that return -1 on
638 * error cannot return a size_t.
640 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
641 * crashes, and also frequently caused JB to jump to 100%
642 * CPU and stay there. (Because it thought it had just
643 * read ((unsigned)-1) == 4Gb of data...)
645 * - The signature of write_socket has changed, it now simply
646 * returns success=0/failure=nonzero.
648 * - Trying to get rid of a few warnings --with-debug on
649 * Windows, I've introduced a new type "jb_socket". This is
650 * used for the socket file descriptors. On Windows, this
651 * is SOCKET (a typedef for unsigned). Everywhere else, it's
652 * an int. The error value can't be -1 any more, so it's
653 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
654 * Windows it maps to the #define INVALID_SOCKET.)
656 * - The signature of bind_port has changed.
658 * Revision 1.78 2002/03/08 21:35:04 oes
659 * Added optional group supplement to --user option. Will now use default group of user if no group given
661 * Revision 1.77 2002/03/07 03:52:06 oes
662 * - Fixed compiler warnings etc
663 * - Improved handling of failed DNS lookups
665 * Revision 1.76 2002/03/06 22:54:35 jongfoster
666 * Automated function-comment nitpicking.
668 * Revision 1.75 2002/03/06 10:02:19 oes
669 * Fixed stupid bug when --user was not given
671 * Revision 1.74 2002/03/06 00:49:31 jongfoster
672 * Fixing warning on Windows
673 * Making #ifdefs that refer to the same variable consistently
674 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
676 * Revision 1.73 2002/03/05 23:57:30 hal9
677 * Stray character 's' on line 1618 was breaking build.
679 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
680 * - Re-enable OS/2 building after new parms were added
681 * - Fix false out of memory report when resolving CGI templates when no IP
682 * address is available of failed attempt (a la no such domain)
684 * Revision 1.71 2002/03/05 18:13:56 oes
685 * Added --user option
687 * Revision 1.70 2002/03/05 04:52:42 oes
688 * Deleted non-errlog debugging code
690 * Revision 1.69 2002/03/04 23:50:00 jongfoster
691 * Splitting off bind_port() call into bind_port_helper(), with
694 * Revision 1.68 2002/03/04 20:17:32 oes
697 * Revision 1.67 2002/03/04 18:18:57 oes
698 * - Removed _DEBUG mode
699 * - Cleand up cmdline parsing
700 * - Introduced --no-daemon, --pidfile options
701 * - Cleaned up signal handling:
702 * - Terminate cleanly on INT, TERM and ABRT
703 * - Schedule logfile for re-opening on HUP
704 * - Ignore CHLD and PIPE
705 * - Leave the rest with their default handlers
706 * - Uniform handler registration
707 * - Added usage() function
708 * - Played styleguide police
710 * Revision 1.66 2002/03/03 15:06:55 oes
711 * Re-enabled automatic config reloading
713 * Revision 1.65 2002/03/03 14:49:11 oes
714 * Fixed CLF logging: Now uses client's original HTTP request
716 * Revision 1.64 2002/03/03 09:18:03 joergs
717 * Made jumbjuster work on AmigaOS again.
719 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
720 * Clean up a little CRLF unpleasantness that suddenly appeared
722 * Revision 1.62 2002/02/20 23:17:23 jongfoster
723 * Detecting some out-of memory conditions and exiting with a log message.
725 * Revision 1.61 2002/01/17 21:01:52 jongfoster
726 * Moving all our URL and URL pattern parsing code to urlmatch.c.
728 * Revision 1.60 2001/12/30 14:07:32 steudten
729 * - Add signal handling (unix)
730 * - Add SIGHUP handler (unix)
731 * - Add creation of pidfile (unix)
732 * - Add action 'top' in rc file (RH)
733 * - Add entry 'SIGNALS' to manpage
734 * - Add exit message to logfile (unix)
736 * Revision 1.59 2001/12/13 14:07:18 oes
737 * Fixed Bug: 503 error page now sent OK
739 * Revision 1.58 2001/11/30 23:37:24 jongfoster
740 * Renaming the Win32 config file to config.txt - this is almost the
741 * same as the corresponding UNIX name "config"
743 * Revision 1.57 2001/11/16 00:47:43 jongfoster
744 * Changing the tty-disconnection code to use setsid().
746 * Revision 1.56 2001/11/13 20:20:54 jongfoster
747 * Tabs->spaces, fixing a bug with missing {} around an if()
749 * Revision 1.55 2001/11/13 20:14:53 jongfoster
750 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
752 * Revision 1.54 2001/11/07 00:03:14 steudten
753 * Give reliable return value if an error
754 * occurs not just 0 with new daemon mode.
756 * Revision 1.53 2001/11/05 21:41:43 steudten
757 * Add changes to be a real daemon just for unix os.
758 * (change cwd to /, detach from controlling tty, set
759 * process group and session leader to the own process.
761 * Add some fatal-error log message for failed malloc().
762 * Add '-d' if compiled with 'configure --with-debug' to
763 * enable debug output.
765 * Revision 1.52 2001/10/26 20:11:20 jongfoster
766 * Fixing type mismatch
768 * Revision 1.51 2001/10/26 17:38:28 oes
771 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
772 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
773 * threads to call select() simultaneously. So, it's time to do a real, live,
774 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
775 * (native). Both versions will work, but using __OS2__ offers multi-threading.
777 * Revision 1.49 2001/10/23 21:41:35 jongfoster
778 * Added call to initialize the (statically-allocated of course)
779 * "out of memory" CGI response.
781 * Revision 1.48 2001/10/10 19:56:46 jongfoster
782 * Moving some code that wasn't cookie-related out of an #ifdef
785 * Revision 1.47 2001/10/10 16:44:36 oes
786 * Added CONNECT destination port limitation check
788 * Revision 1.46 2001/10/08 15:17:41 oes
789 * Re-enabled SSL forwarding
791 * Revision 1.45 2001/10/07 15:42:11 oes
792 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
794 * Moved downgrading of the HTTP version from parse_http_request to
795 * chat(), since we can't decide if it is necessary before we have
796 * determined the actions for the URL. The HTTP command is now
797 * *always* re-built so the repairs need no longer be special-cased.
799 * filter_popups now gets a csp pointer so it can raise the new
800 * CSP_FLAG_MODIFIED flag.
804 * Added configurable size limit for the IOB. If the IOB grows so
805 * large that the next read would exceed the limit, the header
806 * is generated, and the header & unfiltered buffer are flushed
807 * to the client. Chat then continues in non-buffering,
808 * non-filtering body mode.
810 * Revision 1.44 2001/10/02 18:13:57 oes
813 * Revision 1.43 2001/10/02 15:32:13 oes
814 * Moved generation of hdr
816 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
817 * Cleaning up 2 compiler warnings on OS/2.
819 * Revision 1.41 2001/09/16 17:05:14 jongfoster
820 * Removing unused #include showarg.h
822 * Revision 1.40 2001/09/16 15:41:45 jongfoster
823 * Fixing signed/unsigned comparison warning.
825 * Revision 1.39 2001/09/16 13:21:27 jongfoster
826 * Changes to use new list functions.
828 * Revision 1.38 2001/09/16 13:01:46 jongfoster
829 * Removing redundant function call that zeroed zalloc()'d memory.
831 * Revision 1.37 2001/09/10 11:12:24 oes
832 * Deleted unused variable
834 * Revision 1.36 2001/09/10 10:56:15 oes
835 * Silenced compiler warnings
837 * Revision 1.35 2001/07/31 14:44:22 oes
838 * Deleted unused size parameter from filter_popups()
840 * Revision 1.34 2001/07/30 22:08:36 jongfoster
841 * Tidying up #defines:
842 * - All feature #defines are now of the form FEATURE_xxx
843 * - Permanently turned off WIN_GUI_EDIT
844 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
846 * Revision 1.33 2001/07/29 19:32:00 jongfoster
847 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
849 * Revision 1.32 2001/07/29 18:47:05 jongfoster
850 * Adding missing #include "loadcfg.h"
852 * Revision 1.31 2001/07/29 12:17:48 oes
853 * Applied pthread fix by Paul Lieverse
855 * Revision 1.30 2001/07/25 22:57:13 jongfoster
856 * __BEOS__ no longer overrides FEATURE_PTHREAD.
857 * This is because FEATURE_PTHREAD will soon be widely used, so I
858 * want to keep it simple.
860 * Revision 1.29 2001/07/24 12:47:06 oes
861 * Applied BeOS support update by Eugenia
863 * Revision 1.28 2001/07/23 13:26:12 oes
864 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
866 * Revision 1.27 2001/07/19 19:09:47 haroon
867 * - Added code to take care of the situation where while processing the first
868 * server response (which includes the server header), after finding the end
869 * of the headers we were not looking past the end of the headers for
870 * content modification. I enabled it for filter_popups.
871 * Someone else should look to see if other similar operations should be
872 * done to the discarded portion of the buffer.
874 * Note 2001/07/20: No, the other content modification mechanisms will process
875 * the whole iob later anyway. --oes
877 * Revision 1.26 2001/07/18 12:31:36 oes
880 * Revision 1.25 2001/07/15 19:43:49 jongfoster
881 * Supports POSIX threads.
882 * Also removed some unused #includes.
884 * Revision 1.24 2001/07/13 14:00:40 oes
885 * - Generic content modification scheme:
886 * Each feature has its own applicability flag that is set
887 * from csp->action->flags.
888 * Replaced the "filtering" int flag , by a function pointer
889 * "content_filter" to the function that will do the content
890 * modification. If it is != NULL, the document will be buffered
891 * and processed through *content_filter, which must set
892 * csp->content_length and return a modified copy of the body
893 * or return NULL (on failiure).
894 * - Changed csp->is_text to the more generic bitmap csp->content_type
895 * which can currently take the valued CT_TEXT or CT_GIF
897 * - Removed all #ifdef PCRS
899 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
900 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
901 * the `block_acl' call. This prevents a compilation error when the user
902 * does not wish to use the "ACL" feature.
904 * Revision 1.22 2001/06/29 21:45:41 oes
905 * Indentation, CRLF->LF, Tab-> Space
907 * Revision 1.21 2001/06/29 13:29:36 oes
908 * - Cleaned up, improved comments
909 * - Unified all possible interceptors (CGI,
910 * block, trust, fast_redirect) in one
911 * place, with one (CGI) answer generation
912 * mechansim. Much clearer now.
913 * - Removed the GIF image generation, which
914 * is now done in filters.c:block_url()
915 * - Made error conditions like domain lookup
916 * failiure or (various) problems while talking
917 * to the server use cgi.c:error_response()
918 * instead of generating HTML/HTTP in chat() (yuck!)
919 * - Removed logentry from cancelled commit
921 * Revision 1.20 2001/06/09 10:55:28 jongfoster
922 * Changing BUFSIZ ==> BUFFER_SIZE
924 * Revision 1.19 2001/06/07 23:12:52 jongfoster
925 * Replacing function pointer in struct gateway with a directly
926 * called function forwarded_connect().
927 * Replacing struct gateway with struct forward_spec
929 * Revision 1.18 2001/06/03 19:12:16 oes
930 * introduced new cgi handling
932 * Revision 1.17 2001/06/01 20:07:23 jongfoster
933 * Now uses action +image-blocker{} rather than config->tinygif
935 * Revision 1.16 2001/06/01 18:49:17 jongfoster
936 * Replaced "list_share" with "list" - the tiny memory gain was not
937 * worth the extra complexity.
939 * Revision 1.15 2001/05/31 21:24:47 jongfoster
940 * Changed "permission" to "action" throughout.
941 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
942 * Moved vanilla wafer check into chat(), since we must now
943 * decide whether or not to add it based on the URL.
945 * Revision 1.14 2001/05/29 20:14:01 joergs
946 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
949 * Revision 1.13 2001/05/29 09:50:24 jongfoster
950 * Unified blocklist/imagelist/permissionslist.
951 * File format is still under discussion, but the internal changes
954 * Also modified interceptor behaviour:
955 * - We now intercept all URLs beginning with one of the following
956 * prefixes (and *only* these prefixes):
958 * * http://ijbswa.sf.net/config/
959 * * http://ijbswa.sourceforge.net/config/
960 * - New interceptors "home page" - go to http://i.j.b/ to see it.
961 * - Internal changes so that intercepted and fast redirect pages
962 * are not replaced with an image.
963 * - Interceptors now have the option to send a binary page direct
964 * to the client. (i.e. ijb-send-banner uses this)
965 * - Implemented show-url-info interceptor. (Which is why I needed
966 * the above interceptors changes - a typical URL is
967 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
968 * The previous mechanism would not have intercepted that, and
969 * if it had been intercepted then it then it would have replaced
972 * Revision 1.12 2001/05/27 22:17:04 oes
974 * - re_process_buffer no longer writes the modified buffer
975 * to the client, which was very ugly. It now returns the
976 * buffer, which it is then written by chat.
978 * - content_length now adjusts the Content-Length: header
979 * for modified documents rather than crunch()ing it.
980 * (Length info in csp->content_length, which is 0 for
981 * unmodified documents)
983 * - For this to work, sed() is called twice when filtering.
985 * Revision 1.11 2001/05/26 17:27:53 jongfoster
986 * Added support for CLF and fixed LOG_LEVEL_LOG.
987 * Also did CRLF->LF fix of my previous patch.
989 * Revision 1.10 2001/05/26 15:26:15 jongfoster
990 * ACL feature now provides more security by immediately dropping
991 * connections from untrusted hosts.
993 * Revision 1.9 2001/05/26 00:28:36 jongfoster
994 * Automatic reloading of config file.
995 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
996 * Most of the global variables have been moved to a new
997 * struct configuration_spec, accessed through csp->config->globalname
998 * Most of the globals remaining are used by the Win32 GUI.
1000 * Revision 1.8 2001/05/25 22:43:18 jongfoster
1001 * Fixing minor memory leak and buffer overflow.
1003 * Revision 1.7 2001/05/25 22:34:30 jongfoster
1006 * Revision 1.6 2001/05/23 00:13:58 joergs
1007 * AmigaOS support fixed.
1009 * Revision 1.5 2001/05/22 18:46:04 oes
1011 * - Enabled filtering banners by size rather than URL
1012 * by adding patterns that replace all standard banner
1013 * sizes with the "Junkbuster" gif to the re_filterfile
1015 * - Enabled filtering WebBugs by providing a pattern
1016 * which kills all 1x1 images
1018 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
1019 * which is selected by the (nonstandard and therefore
1020 * capital) letter 'U' in the option string.
1021 * It causes the quantifiers to be ungreedy by default.
1022 * Appending a ? turns back to greedy (!).
1024 * - Added a new interceptor ijb-send-banner, which
1025 * sends back the "Junkbuster" gif. Without imagelist or
1026 * MSIE detection support, or if tinygif = 1, or the
1027 * URL isn't recognized as an imageurl, a lame HTML
1028 * explanation is sent instead.
1030 * - Added new feature, which permits blocking remote
1031 * script redirects and firing back a local redirect
1033 * The feature is conditionally compiled, i.e. it
1034 * can be disabled with --disable-fast-redirects,
1035 * plus it must be activated by a "fast-redirects"
1036 * line in the config file, has its own log level
1037 * and of course wants to be displayed by show-proxy-args
1038 * Note: Boy, all the #ifdefs in 1001 locations and
1039 * all the fumbling with configure.in and acconfig.h
1040 * were *way* more work than the feature itself :-(
1042 * - Because a generic redirect template was needed for
1043 * this, tinygif = 3 now uses the same.
1045 * - Moved GIFs, and other static HTTP response templates
1048 * - Some minor fixes
1050 * - Removed some >400 CRs again (Jon, you really worked
1053 * Revision 1.4 2001/05/21 19:34:01 jongfoster
1054 * Made failure to bind() a fatal error.
1056 * Revision 1.3 2001/05/20 01:21:20 jongfoster
1057 * Version 2.9.4 checkin.
1058 * - Merged popupfile and cookiefile, and added control over PCRS
1059 * filtering, in new "permissionsfile".
1060 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
1061 * file error you now get a message box (in the Win32 GUI) rather
1062 * than the program exiting with no explanation.
1063 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
1065 * - Removed tabs from "config"
1066 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
1067 * - Bumped up version number.
1069 * Revision 1.2 2001/05/17 22:34:44 oes
1070 * - Added hint on GIF char array generation to jcc.c
1071 * - Cleaned CRLF's from the sources and related files
1072 * - Repaired logging for REF and FRC
1074 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
1075 * Initial import of version 2.9.3 source tree
1078 *********************************************************************/
1084 #include <sys/types.h>
1093 # ifndef FEATURE_PTHREAD
1097 # include <windows.h>
1098 # include <process.h>
1099 # endif /* ndef FEATURE_PTHREAD */
1102 # ifndef _WIN_CONSOLE
1103 # include "w32log.h"
1104 # endif /* ndef _WIN_CONSOLE */
1105 # include "w32svrapi.h"
1107 #else /* ifndef _WIN32 */
1109 # if !defined (__OS2__)
1110 # include <unistd.h>
1111 # include <sys/wait.h>
1112 # endif /* ndef __OS2__ */
1113 # include <sys/time.h>
1114 # include <sys/stat.h>
1115 # include <sys/ioctl.h>
1118 #include <sys/termios.h>
1126 # include <signal.h>
1129 # include <socket.h> /* BeOS has select() for sockets only. */
1130 # include <OS.h> /* declarations for threads and stuff. */
1133 # if defined(__EMX__) || defined(__OS2__)
1134 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
1139 #define bzero(B,N) memset(B,0x00,n)
1143 # include <select.h>
1148 #include "project.h"
1151 #include "filters.h"
1152 #include "loaders.h"
1153 #include "parsers.h"
1154 #include "miscutil.h"
1156 #include "jbsockets.h"
1157 #include "gateway.h"
1158 #include "actions.h"
1160 #include "loadcfg.h"
1161 #include "urlmatch.h"
1163 const char jcc_h_rcs[] = JCC_H_VERSION;
1164 const char project_h_rcs[] = PROJECT_H_VERSION;
1167 struct client_state clients[1];
1168 struct file_list files[1];
1170 #ifdef FEATURE_STATISTICS
1171 int urls_read = 0; /* total nr of urls read inc rejected */
1172 int urls_rejected = 0; /* total nr of urls rejected */
1173 #endif /* def FEATURE_STATISTICS */
1175 #ifdef FEATURE_GRACEFUL_TERMINATION
1176 int g_terminate = 0;
1179 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1180 static void sig_handler(int the_signal);
1182 static int client_protocol_is_unsupported(const struct client_state *csp, char *req);
1183 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
1184 static jb_err get_server_headers(struct client_state *csp);
1185 static const char *crunch_reason(const struct http_response *rsp);
1186 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp);
1188 * static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len);
1190 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
1191 static jb_err change_request_destination(struct client_state *csp);
1192 static void chat(struct client_state *csp);
1193 static void serve(struct client_state *csp);
1194 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1195 static void usage(const char *myname);
1197 static void initialize_mutexes(void);
1198 static jb_socket bind_port_helper(struct configuration_spec *config);
1199 static void listen_loop(void);
1202 void serve(struct client_state *csp);
1203 #else /* ifndef AMIGA */
1204 static void serve(struct client_state *csp);
1205 #endif /* def AMIGA */
1208 static int32 server_thread(void *data);
1209 #endif /* def __BEOS__ */
1212 #define sleep(N) Sleep(((N) * 1000))
1216 #define sleep(N) DosSleep(((N) * 100))
1219 #ifdef MUTEX_LOCKS_AVAILABLE
1221 * XXX: Does the locking stuff really belong in this file?
1223 privoxy_mutex_t log_mutex;
1224 privoxy_mutex_t log_init_mutex;
1225 privoxy_mutex_t connection_reuse_mutex;
1227 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
1228 privoxy_mutex_t resolver_mutex;
1229 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
1231 #ifndef HAVE_GMTIME_R
1232 privoxy_mutex_t gmtime_mutex;
1233 #endif /* ndef HAVE_GMTIME_R */
1235 #ifndef HAVE_LOCALTIME_R
1236 privoxy_mutex_t localtime_mutex;
1237 #endif /* ndef HAVE_GMTIME_R */
1240 privoxy_mutex_t rand_mutex;
1241 #endif /* ndef HAVE_RANDOM */
1243 #endif /* def MUTEX_LOCKS_AVAILABLE */
1246 const char *basedir = NULL;
1247 const char *pidfile = NULL;
1248 static int received_hup_signal = 0;
1249 #endif /* defined unix */
1251 /* HTTP snipplets. */
1252 static const char CSUCCEED[] =
1253 "HTTP/1.0 200 Connection established\r\n"
1254 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
1256 static const char CHEADER[] =
1257 "HTTP/1.0 400 Invalid header received from client\r\n"
1258 "Proxy-Agent: Privoxy " VERSION "\r\n"
1259 "Content-Type: text/plain\r\n"
1260 "Connection: close\r\n\r\n"
1261 "Invalid header received from client.\r\n";
1263 static const char FTP_RESPONSE[] =
1264 "HTTP/1.0 400 Invalid request received from client\r\n"
1265 "Content-Type: text/plain\r\n"
1266 "Connection: close\r\n\r\n"
1267 "Invalid request. Privoxy doesn't support FTP.\r\n";
1269 static const char GOPHER_RESPONSE[] =
1270 "HTTP/1.0 400 Invalid request received from client\r\n"
1271 "Content-Type: text/plain\r\n"
1272 "Connection: close\r\n\r\n"
1273 "Invalid request. Privoxy doesn't support gopher.\r\n";
1275 /* XXX: should be a template */
1276 static const char MISSING_DESTINATION_RESPONSE[] =
1277 "HTTP/1.0 400 Bad request received from client\r\n"
1278 "Proxy-Agent: Privoxy " VERSION "\r\n"
1279 "Content-Type: text/plain\r\n"
1280 "Connection: close\r\n\r\n"
1281 "Bad request. Privoxy was unable to extract the destination.\r\n";
1283 /* XXX: should be a template */
1284 static const char NO_SERVER_DATA_RESPONSE[] =
1285 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1286 "Proxy-Agent: Privoxy " VERSION "\r\n"
1287 "Content-Type: text/plain\r\n"
1288 "Connection: close\r\n\r\n"
1289 "Empty server or forwarder response.\r\n"
1290 "The connection has been closed but Privoxy didn't receive any data.\r\n";
1292 /* XXX: should be a template */
1293 static const char INVALID_SERVER_HEADERS_RESPONSE[] =
1294 "HTTP/1.0 502 Server or forwarder response invalid\r\n"
1295 "Proxy-Agent: Privoxy " VERSION "\r\n"
1296 "Content-Type: text/plain\r\n"
1297 "Connection: close\r\n\r\n"
1298 "Bad response. The server or forwarder response doesn't look like HTTP.\r\n";
1301 /* XXX: should be a template */
1302 static const char NULL_BYTE_RESPONSE[] =
1303 "HTTP/1.0 400 Bad request received from client\r\n"
1304 "Proxy-Agent: Privoxy " VERSION "\r\n"
1305 "Content-Type: text/plain\r\n"
1306 "Connection: close\r\n\r\n"
1307 "Bad request. Null byte(s) before end of request.\r\n";
1310 /* XXX: should be a template */
1311 static const char MESSED_UP_REQUEST_RESPONSE[] =
1312 "HTTP/1.0 400 Malformed request after rewriting\r\n"
1313 "Proxy-Agent: Privoxy " VERSION "\r\n"
1314 "Content-Type: text/plain\r\n"
1315 "Connection: close\r\n\r\n"
1316 "Bad request. Messed up with header filters.\r\n";
1318 /* A function to crunch a response */
1319 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
1321 /* Crunch function flags */
1322 #define CF_NO_FLAGS 0
1323 /* Cruncher applies to forced requests as well */
1324 #define CF_IGNORE_FORCE 1
1325 /* Crunched requests are counted for the block statistics */
1326 #define CF_COUNT_AS_REJECT 2
1328 /* A crunch function and its flags */
1331 const crunch_func_ptr cruncher;
1335 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
1337 /* Complete list of cruncher functions */
1338 static const struct cruncher crunchers_all[] = {
1339 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
1340 { block_url, CF_COUNT_AS_REJECT },
1341 #ifdef FEATURE_TRUST
1342 { trust_url, CF_COUNT_AS_REJECT },
1343 #endif /* def FEATURE_TRUST */
1344 { redirect_url, CF_NO_FLAGS },
1345 { dispatch_cgi, CF_IGNORE_FORCE},
1349 /* Light version, used after tags are applied */
1350 static const struct cruncher crunchers_light[] = {
1351 { block_url, CF_COUNT_AS_REJECT },
1352 { redirect_url, CF_NO_FLAGS },
1358 * XXX: Don't we really mean
1364 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1365 /*********************************************************************
1367 * Function : sig_handler
1369 * Description : Signal handler for different signals.
1370 * Exit gracefully on TERM and INT
1371 * or set a flag that will cause the errlog
1372 * to be reopened by the main thread on HUP.
1375 * 1 : the_signal = the signal cause this function to call
1379 *********************************************************************/
1380 static void sig_handler(int the_signal)
1386 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1398 received_hup_signal = 1;
1404 * We shouldn't be here, unless we catch signals
1405 * in main() that we can't handle here!
1407 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1415 /*********************************************************************
1417 * Function : client_protocol_is_unsupported
1419 * Description : Checks if the client used a known unsupported
1420 * protocol and deals with it by sending an error
1424 * 1 : csp = Current client state (buffers, headers, etc...)
1425 * 2 : req = the first request line send by the client
1427 * Returns : TRUE if an error response has been generated, or
1428 * FALSE if the request doesn't look invalid.
1430 *********************************************************************/
1431 static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1434 * If it's a FTP or gopher request, we don't support it.
1436 * These checks are better than nothing, but they might
1437 * not work in all configurations and some clients might
1438 * have problems digesting the answer.
1440 * They should, however, never cause more problems than
1441 * Privoxy's old behaviour (returning the misleading HTML
1444 * "Could not resolve http://(ftp|gopher)://example.org").
1446 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1448 const char *response = NULL;
1449 const char *protocol = NULL;
1451 if (!strncmpic(req, "GET ftp://", 10))
1453 response = FTP_RESPONSE;
1458 response = GOPHER_RESPONSE;
1459 protocol = "GOPHER";
1461 log_error(LOG_LEVEL_ERROR,
1462 "%s tried to use Privoxy as %s proxy: %s",
1463 csp->ip_addr_str, protocol, req);
1464 log_error(LOG_LEVEL_CLF,
1465 "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1467 write_socket(csp->cfd, response, strlen(response));
1476 /*********************************************************************
1478 * Function : get_request_destination_elsewhere
1480 * Description : If the client's request was redirected into
1481 * Privoxy without the client's knowledge,
1482 * the request line lacks the destination host.
1484 * This function tries to get it elsewhere,
1485 * provided accept-intercepted-requests is enabled.
1487 * "Elsewhere" currently only means "Host: header",
1488 * but in the future we may ask the redirecting
1489 * packet filter to look the destination up.
1491 * If the destination stays unknown, an error
1492 * response is send to the client and headers
1493 * are freed so that chat() can return directly.
1496 * 1 : csp = Current client state (buffers, headers, etc...)
1497 * 2 : headers = a header list
1499 * Returns : JB_ERR_OK if the destination is now known, or
1500 * JB_ERR_PARSE if it isn't.
1502 *********************************************************************/
1503 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1507 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1509 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1510 " Privoxy isn't configured to accept intercepted requests.",
1511 csp->ip_addr_str, csp->http->cmd);
1512 /* XXX: Use correct size */
1513 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1514 csp->ip_addr_str, csp->http->cmd);
1516 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1517 destroy_list(headers);
1519 return JB_ERR_PARSE;
1521 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1523 /* Split the domain we just got for pattern matching */
1524 init_domain_components(csp->http);
1530 /* We can't work without destination. Go spread the news.*/
1532 req = list_to_text(headers);
1534 /* XXX: Use correct size */
1535 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1536 csp->ip_addr_str, csp->http->cmd);
1537 log_error(LOG_LEVEL_ERROR,
1538 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1539 csp->ip_addr_str, csp->http->cmd, req);
1542 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
1543 destroy_list(headers);
1545 return JB_ERR_PARSE;
1548 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1549 * to get the destination IP address, use it as host directly
1550 * or do a reverse DNS lookup first.
1555 /*********************************************************************
1557 * Function : get_server_headers
1559 * Description : Parses server headers in iob and fills them
1560 * into csp->headers so that they can later be
1564 * 1 : csp = Current client state (buffers, headers, etc...)
1566 * Returns : JB_ERR_OK if everything went fine, or
1567 * JB_ERR_PARSE if the headers were incomplete.
1569 *********************************************************************/
1570 static jb_err get_server_headers(struct client_state *csp)
1572 int continue_hack_in_da_house = 0;
1575 while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
1580 * continue hack in da house. Ignore the ending of
1581 * this head and continue enlisting header lines.
1582 * The reason is described below.
1584 enlist(csp->headers, "");
1585 continue_hack_in_da_house = 0;
1588 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1591 * It's a bodyless continue response, don't
1592 * stop header parsing after reaching its end.
1594 * As a result Privoxy will concatenate the
1595 * next response's head and parse and deliver
1596 * the headers as if they belonged to one request.
1598 * The client will separate them because of the
1599 * empty line between them.
1601 * XXX: What we're doing here is clearly against
1602 * the intended purpose of the continue header,
1603 * and under some conditions (HTTP/1.0 client request)
1604 * it's a standard violation.
1606 * Anyway, "sort of against the spec" is preferable
1607 * to "always getting confused by Continue responses"
1608 * (Privoxy's behaviour before this hack was added)
1610 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1611 continue_hack_in_da_house = 1;
1613 else if (*header == '\0')
1616 * If the header is empty, but the Continue hack
1617 * isn't active, we can assume that we reached the
1618 * end of the buffer before we hit the end of the
1621 * Inform the caller an let it decide how to handle it.
1623 return JB_ERR_PARSE;
1626 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1629 * XXX: Should we quit the request and return a
1630 * out of memory error page instead?
1632 log_error(LOG_LEVEL_ERROR,
1633 "Out of memory while enlisting server headers. %s lost.",
1643 /*********************************************************************
1645 * Function : crunch_reason
1647 * Description : Translates the crunch reason code into a string.
1650 * 1 : rsp = a http_response
1652 * Returns : A string with the crunch reason or an error description.
1654 *********************************************************************/
1655 static const char *crunch_reason(const struct http_response *rsp)
1657 char * reason = NULL;
1659 assert(rsp != NULL);
1662 return "Internal error while searching for crunch reason";
1665 switch (rsp->reason)
1667 case RSP_REASON_UNSUPPORTED:
1668 reason = "Unsupported HTTP feature";
1670 case RSP_REASON_BLOCKED:
1673 case RSP_REASON_UNTRUSTED:
1674 reason = "Untrusted";
1676 case RSP_REASON_REDIRECTED:
1677 reason = "Redirected";
1679 case RSP_REASON_CGI_CALL:
1680 reason = "CGI Call";
1682 case RSP_REASON_NO_SUCH_DOMAIN:
1683 reason = "DNS failure";
1685 case RSP_REASON_FORWARDING_FAILED:
1686 reason = "Forwarding failed";
1688 case RSP_REASON_CONNECT_FAILED:
1689 reason = "Connection failure";
1691 case RSP_REASON_OUT_OF_MEMORY:
1692 reason = "Out of memory (may mask other reasons)";
1695 reason = "No reason recorded";
1703 /*********************************************************************
1705 * Function : send_crunch_response
1707 * Description : Delivers already prepared response for
1708 * intercepted requests, logs the interception
1709 * and frees the response.
1712 * 1 : csp = Current client state (buffers, headers, etc...)
1713 * 1 : rsp = Fully prepared response. Will be freed on exit.
1715 * Returns : Nothing.
1717 *********************************************************************/
1718 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp)
1720 const struct http_request *http = csp->http;
1721 char status_code[4];
1723 assert(rsp != NULL);
1724 assert(rsp->head != NULL);
1729 * Not supposed to happen. If it does
1730 * anyway, treat it as an unknown error.
1732 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1733 /* return code doesn't matter */
1738 /* If rsp is still NULL, we have serious internal problems. */
1739 log_error(LOG_LEVEL_FATAL,
1740 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1744 * Extract the status code from the actual head
1745 * that was send to the client. It is the only
1746 * way to get it right for all requests, including
1747 * the fixed ones for out-of-memory problems.
1749 * A head starts like this: 'HTTP/1.1 200...'
1753 status_code[0] = rsp->head[9];
1754 status_code[1] = rsp->head[10];
1755 status_code[2] = rsp->head[11];
1756 status_code[3] = '\0';
1758 /* Write the answer to the client */
1759 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1760 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1762 /* There is nothing we can do about it. */
1763 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1766 /* Log that the request was crunched and why. */
1767 log_error(LOG_LEVEL_GPC, "%s%s crunch! (%s)",
1768 http->hostport, http->path, crunch_reason(rsp));
1769 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %d",
1770 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1772 /* Clean up and return */
1773 if (cgi_error_memory() != rsp)
1775 free_http_response(rsp);
1782 /*********************************************************************
1784 * Function : request_contains_null_bytes
1786 * Description : Checks for NULL bytes in the request and sends
1787 * an error message to the client if any were found.
1789 * XXX: currently not used, see comment in chat().
1792 * 1 : csp = Current client state (buffers, headers, etc...)
1793 * 2 : buf = Data from the client's request to check.
1794 * 3 : len = The data length.
1796 * Returns : TRUE if the request contained one or more NULL bytes, or
1799 *********************************************************************/
1800 static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1802 size_t c_len; /* Request lenght when treated as C string */
1804 c_len = strlen(buf);
1809 * Null byte(s) found. Log the request,
1810 * return an error response and hang up.
1812 size_t tmp_len = c_len;
1817 * Replace NULL byte(s) with '°' characters
1818 * so the request can be logged as string.
1819 * XXX: Is there a better replacement character?
1822 tmp_len += strlen(buf+tmp_len);
1823 } while (tmp_len < len);
1825 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1826 "(length=%d, strlen=%d).", csp->ip_addr_str, len, c_len);
1827 log_error(LOG_LEVEL_HEADER,
1828 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1830 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
1832 /* XXX: Log correct size */
1833 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1843 /*********************************************************************
1845 * Function : crunch_response_triggered
1847 * Description : Checks if the request has to be crunched,
1848 * and delivers the crunch response if necessary.
1851 * 1 : csp = Current client state (buffers, headers, etc...)
1852 * 2 : crunchers = list of cruncher functions to run
1854 * Returns : TRUE if the request was answered with a crunch response
1857 *********************************************************************/
1858 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
1860 struct http_response *rsp = NULL;
1861 const struct cruncher *c;
1864 * If CGI request crunching is disabled,
1865 * check the CGI dispatcher out of order to
1866 * prevent unintentional blocks or redirects.
1868 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
1869 && (NULL != (rsp = dispatch_cgi(csp))))
1871 /* Deliver, log and free the interception response. */
1872 send_crunch_response(csp, rsp);
1876 for (c = crunchers; c->cruncher != NULL; c++)
1879 * Check the cruncher if either Privoxy is toggled
1880 * on and the request isn't forced, or if the cruncher
1881 * applies to forced requests as well.
1883 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
1884 !(csp->flags & CSP_FLAG_FORCED)) ||
1885 (c->flags & CF_IGNORE_FORCE))
1887 rsp = c->cruncher(csp);
1890 /* Deliver, log and free the interception response. */
1891 send_crunch_response(csp, rsp);
1892 #ifdef FEATURE_STATISTICS
1893 if (c->flags & CF_COUNT_AS_REJECT)
1895 csp->flags |= CSP_FLAG_REJECTED;
1897 #endif /* def FEATURE_STATISTICS */
1908 /*********************************************************************
1910 * Function : build_request_line
1912 * Description : Builds the HTTP request line.
1914 * If a HTTP forwarder is used it expects the whole URL,
1915 * web servers only get the path.
1918 * 1 : csp = Current client state (buffers, headers, etc...)
1919 * 2 : fwd = The forwarding spec used for the request
1920 * XXX: Should use http->fwd instead.
1921 * 3 : request_line = The old request line which will be replaced.
1923 * Returns : Nothing. Terminates in case of memory problems.
1925 *********************************************************************/
1926 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
1928 struct http_request *http = csp->http;
1930 assert(http->ssl == 0);
1933 * Downgrade http version from 1.1 to 1.0
1934 * if +downgrade action applies.
1936 if ( (csp->action->flags & ACTION_DOWNGRADE)
1937 && (!strcmpic(http->ver, "HTTP/1.1")))
1940 http->ver = strdup("HTTP/1.0");
1942 if (http->ver == NULL)
1944 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1949 * Rebuild the request line.
1951 freez(*request_line);
1952 *request_line = strdup(http->gpc);
1953 string_append(request_line, " ");
1955 if (fwd->forward_host)
1957 string_append(request_line, http->url);
1961 string_append(request_line, http->path);
1963 string_append(request_line, " ");
1964 string_append(request_line, http->ver);
1966 if (*request_line == NULL)
1968 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1970 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
1974 /*********************************************************************
1976 * Function : change_request_destination
1978 * Description : Parse a (rewritten) request line and regenerate
1979 * the http request data.
1982 * 1 : csp = Current client state (buffers, headers, etc...)
1984 * Returns : Forwards the parse_http_request() return code.
1985 * Terminates in case of memory problems.
1987 *********************************************************************/
1988 static jb_err change_request_destination(struct client_state *csp)
1990 struct http_request *http = csp->http;
1993 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
1994 free_http_request(http);
1995 err = parse_http_request(csp->headers->first->str, http, csp);
1996 if (JB_ERR_OK != err)
1998 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
1999 jb_err_to_string(err));
2003 /* XXX: ocmd is a misleading name */
2004 http->ocmd = strdup(http->cmd);
2005 if (http->ocmd == NULL)
2007 log_error(LOG_LEVEL_FATAL,
2008 "Out of memory copying rewritten HTTP request line");
2016 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2017 /*********************************************************************
2019 * Function : server_response_is_complete
2021 * Description : Determines whether we should stop reading
2022 * from the server socket.
2025 * 1 : csp = Current client state (buffers, headers, etc...)
2026 * 2 : content_length = Length of content received so far.
2028 * Returns : TRUE if the response is complete,
2031 *********************************************************************/
2032 static int server_response_is_complete(struct client_state *csp, size_t content_length)
2034 int content_length_known = (csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
2036 if (!strcmpic(csp->http->gpc, "HEAD"))
2039 * "HEAD" implies no body, we are thus expecting
2040 * no content. XXX: incomplete "list" of methods?
2042 log_error(LOG_LEVEL_INFO, "Method %s implies no body.", csp->http->gpc);
2043 csp->expected_content_length = 0;
2044 content_length_known = TRUE;
2047 if (csp->http->status == 304)
2050 * Expect no body. XXX: incomplete "list" of status codes?
2052 log_error(LOG_LEVEL_INFO, "Status code %d implies no body.", csp->http->status);
2053 csp->expected_content_length = 0;
2054 content_length_known = TRUE;
2057 return (content_length_known && ((0 == csp->expected_content_length)
2058 || (csp->expected_content_length <= content_length)));
2060 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2063 /*********************************************************************
2067 * Description : Once a connection to the client has been accepted,
2068 * this function is called (via serve()) to handle the
2069 * main business of the communication. When this
2070 * function returns, the caller must close the client
2073 * FIXME: chat is nearly thousand lines long.
2077 * 1 : csp = Current client state (buffers, headers, etc...)
2079 * Returns : Nothing.
2081 *********************************************************************/
2082 static void chat(struct client_state *csp)
2084 char buf[BUFFER_SIZE];
2092 int ms_iis5_hack = 0;
2093 size_t byte_count = 0;
2094 int forwarded_connect_retries = 0;
2095 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
2096 const struct forward_spec * fwd;
2097 struct http_request *http;
2098 int len; /* for buffer sizes (and negative error codes) */
2101 /* Function that does the content filtering for the current request */
2102 filter_function_ptr content_filter = NULL;
2104 /* Skeleton for HTTP response, if we should intercept the request */
2105 struct http_response *rsp;
2107 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
2108 struct list header_list;
2109 struct list *headers = &header_list;
2113 memset(buf, 0, sizeof(buf));
2116 * Read the client's request. Note that since we're not using select() we
2117 * could get blocked here if a client connected, then didn't say anything!
2122 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2124 if (len <= 0) break; /* error! */
2127 * If there is no memory left for buffering the
2128 * request, there is nothing we can do but hang up
2130 if (add_to_iob(csp, buf, len))
2135 req = get_header(csp->iob);
2137 } while ((NULL != req) && ('\0' == *req));
2139 if ((NULL != req) && ('\0' != *req))
2141 /* Request received. Validate and parse it. */
2145 * XXX: Temporary disabled to prevent problems
2146 * with POST requests whose bodies are allowed to
2147 * contain NULL bytes. BR#1730105.
2149 * The main purpose of this check is to properly
2150 * log stuff like BitTorrent traffic and other junk
2151 * that hits public proxies. It's not required for
2152 * Privoxy to functions as those requests are discarded
2155 * It probably should be rewritten to only check
2156 * the head of the request. Another option would
2157 * be to let all POST requests pass, although that
2158 * may not be good enough.
2160 if (request_contains_null_bytes(csp, buf, len))
2162 /* NULL bytes found and dealt with, just hang up. */
2167 /* Does the request line look invalid? */
2168 if (client_protocol_is_unsupported(csp, req))
2171 * Yes. The request has already been
2172 * answered with a error response, the buffers
2173 * were freed and we're done with chatting.
2178 #ifdef FEATURE_FORCE_LOAD
2180 * If this request contains the FORCE_PREFIX and blocks
2181 * aren't enforced, get rid of it and set the force flag.
2183 if (strstr(req, FORCE_PREFIX))
2185 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
2187 log_error(LOG_LEVEL_FORCE,
2188 "Ignored force prefix in request: \"%s\".", req);
2192 strclean(req, FORCE_PREFIX);
2193 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
2194 csp->flags |= CSP_FLAG_FORCED;
2198 #endif /* def FEATURE_FORCE_LOAD */
2199 err = parse_http_request(req, http, csp);
2200 if (JB_ERR_OK != err)
2202 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", jb_err_to_string(err));
2208 if (http->cmd == NULL)
2210 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
2211 /* XXX: Use correct size */
2212 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2213 log_error(LOG_LEVEL_ERROR, "Invalid header received from %s.", csp->ip_addr_str);
2215 free_http_request(http);
2219 /* grab the rest of the client's headers */
2223 p = get_header(csp->iob);
2227 /* There are no additional headers to read. */
2234 * We didn't receive a complete header
2235 * line yet, get the rest of it.
2237 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2240 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
2241 destroy_list(headers);
2245 if (add_to_iob(csp, buf, len))
2248 * If there is no memory left for buffering the
2249 * request, there is nothing we can do but hang up
2251 destroy_list(headers);
2258 * We were able to read a complete
2259 * header and can finaly enlist it.
2266 if (http->host == NULL)
2269 * If we still don't know the request destination,
2270 * the request is invalid or the client uses
2271 * Privoxy without its knowledge.
2273 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
2276 * Our attempts to get the request destination
2277 * elsewhere failed or Privoxy is configured
2278 * to only accept proxy requests.
2280 * An error response has already been send
2281 * and we're done here.
2288 * Determine the actions for this URL
2290 #ifdef FEATURE_TOGGLE
2291 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
2293 /* Most compatible set of actions (i.e. none) */
2294 init_current_action(csp->action);
2297 #endif /* ndef FEATURE_TOGGLE */
2299 get_url_actions(csp, http);
2303 * Save a copy of the original request for logging
2305 http->ocmd = strdup(http->cmd);
2307 if (http->ocmd == NULL)
2309 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
2312 enlist(csp->headers, http->cmd);
2314 /* Append the previously read headers */
2315 list_append_list_unique(csp->headers, headers);
2316 destroy_list(headers);
2318 err = sed(csp, FILTER_CLIENT_HEADERS);
2319 if (JB_ERR_OK != err)
2321 assert(err == JB_ERR_PARSE);
2322 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers");
2324 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2326 /* Check request line for rewrites. */
2327 if ((NULL == csp->headers->first->str)
2328 || (strcmp(http->cmd, csp->headers->first->str) &&
2329 (JB_ERR_OK != change_request_destination(csp))))
2332 * A header filter broke the request line - bail out.
2334 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
2335 /* XXX: Use correct size */
2336 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
2337 log_error(LOG_LEVEL_ERROR, "Invalid request line after applying header filters.");
2339 free_http_request(http);
2343 /* decide how to route the HTTP request */
2344 fwd = forward_url(csp, http);
2347 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
2348 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2352 * build the http request to send to the server
2353 * we have to do one of the following:
2355 * create = use the original HTTP request to create a new
2356 * HTTP request that has either the path component
2357 * without the http://domainspec (w/path) or the
2358 * full orininal URL (w/url)
2359 * Note that the path and/or the HTTP version may
2360 * have been altered by now.
2362 * connect = Open a socket to the host:port of the server
2363 * and short-circuit server and client socket.
2365 * pass = Pass the request unchanged if forwarding a CONNECT
2366 * request to a parent proxy. Note that we'll be sending
2367 * the CFAIL message ourselves if connecting to the parent
2368 * fails, but we won't send a CSUCCEED message if it works,
2369 * since that would result in a double message (ours and the
2370 * parent's). After sending the request to the parent, we simply
2373 * here's the matrix:
2376 * +--------+--------+
2378 * 0 | create | connect|
2380 * Forwarding +--------+--------+
2382 * 1 | create | pass |
2384 * +--------+--------+
2388 if (http->ssl && connect_port_is_forbidden(csp))
2390 const char *acceptable_connect_ports =
2391 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
2392 assert(NULL != acceptable_connect_ports);
2393 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
2394 "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
2395 csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
2396 csp->action->flags |= ACTION_BLOCK;
2402 freez(csp->headers->first->str);
2403 build_request_line(csp, fwd, &csp->headers->first->str);
2406 hdr = list_to_text(csp->headers);
2409 /* FIXME Should handle error properly */
2410 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2414 * We have a request. Check if one of the crunchers wants it.
2416 if (crunch_response_triggered(csp, crunchers_all))
2419 * Yes. The client got the crunch response
2420 * and we are done here after cleaning up.
2423 list_remove_all(csp->headers);
2429 * The headers can't be removed earlier because
2430 * they were still needed for the referrer check
2431 * in case of CGI crunches.
2433 * XXX: Would it be worth to move the referrer check
2434 * into client_referrer() and set a flag if it's trusted?
2436 list_remove_all(csp->headers);
2438 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2440 if (fwd->forward_host)
2442 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2443 fwd->forward_host, fwd->forward_port, http->hostport);
2447 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2450 /* here we connect to the server, gateway, or the forwarder */
2452 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
2453 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2455 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
2456 forwarded_connect_retries, http->hostport);
2459 if (csp->sfd == JB_INVALID_SOCKET)
2461 if (fwd->type != SOCKS_NONE)
2464 rsp = error_response(csp, "forwarding-failed", errno);
2466 else if (errno == EINVAL)
2468 rsp = error_response(csp, "no-such-domain", errno);
2472 rsp = error_response(csp, "connect-failed", errno);
2473 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2477 /* Write the answer to the client */
2480 send_crunch_response(csp, rsp);
2487 if (fwd->forward_host || (http->ssl == 0))
2490 * Write the client's (modified) header to the server
2491 * (along with anything else that may be in the buffer)
2493 if (write_socket(csp->sfd, hdr, strlen(hdr))
2494 || (flush_socket(csp->sfd, csp->iob) < 0))
2496 log_error(LOG_LEVEL_CONNECT,
2497 "write header to: %s failed: %E", http->hostport);
2499 rsp = error_response(csp, "connect-failed", errno);
2502 send_crunch_response(csp, rsp);
2512 * We're running an SSL tunnel and we're not forwarding,
2513 * so just send the "connect succeeded" message to the
2514 * client, flush the rest, and get out of the way.
2516 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
2524 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2526 /* we're finished with the client's header */
2529 maxfd = (csp->cfd > csp->sfd) ? csp->cfd : csp->sfd;
2531 /* pass data between the client and server
2532 * until one or the other shuts down the connection.
2541 * FD_ZERO here seems to point to an errant macro which crashes.
2542 * So do this by hand for now...
2544 memset(&rfds,0x00,sizeof(fd_set));
2548 FD_SET(csp->cfd, &rfds);
2549 FD_SET(csp->sfd, &rfds);
2551 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2552 if (server_body && server_response_is_complete(csp, byte_count))
2554 log_error(LOG_LEVEL_CONNECT,
2555 "Done reading from server. Expected content length: %d. "
2556 "Actual content length: %d. Most recently received: %d.",
2557 csp->expected_content_length, byte_count, len);
2560 * XXX: should not jump around,
2561 * chat() is complicated enough already.
2565 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2567 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
2571 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2576 * This is the body of the browser's request,
2577 * just read and write it.
2579 if (FD_ISSET(csp->cfd, &rfds))
2581 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2585 break; /* "game over, man" */
2588 if (write_socket(csp->sfd, buf, (size_t)len))
2590 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2597 * The server wants to talk. It could be the header or the body.
2598 * If `hdr' is null, then it's the header otherwise it's the body.
2599 * FIXME: Does `hdr' really mean `host'? No.
2601 if (FD_ISSET(csp->sfd, &rfds))
2604 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2608 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2610 if (http->ssl && (fwd->forward_host == NULL))
2613 * Just hang up. We already confirmed the client's CONNECT
2614 * request with status code 200 and unencrypted content is
2615 * no longer welcome.
2617 log_error(LOG_LEVEL_ERROR,
2618 "CONNECT already confirmed. Unable to tell the client about the problem.");
2621 else if (byte_count)
2624 * Just hang up. We already transmitted the original headers
2625 * and parts of the original content and therefore missed the
2626 * chance to send an error message (without risking data corruption).
2628 * XXX: we could retry with a fancy range request here.
2630 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2631 "Unable to tell the client about the problem.");
2635 rsp = error_response(csp, "connect-failed", errno);
2638 send_crunch_response(csp, rsp);
2644 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2645 if (csp->flags & CSP_FLAG_CHUNKED)
2647 if ((len > 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2649 /* XXX: this is a temporary hack */
2650 log_error(LOG_LEVEL_CONNECT,
2651 "Looks like we reached the end of the last chunk. "
2652 "We better stop reading.");
2653 csp->expected_content_length = byte_count + (size_t)len;
2654 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2658 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2661 * Add a trailing zero to let be able to use string operations.
2662 * XXX: do we still need this with filter_popups gone?
2667 * Normally, this would indicate that we've read
2668 * as much as the server has sent us and we can
2669 * close the client connection. However, Microsoft
2670 * in its wisdom has released IIS/5 with a bug that
2671 * prevents it from sending the trailing \r\n in
2672 * a 302 redirect header (and possibly other headers).
2673 * To work around this if we've haven't parsed
2674 * a full header we'll append a trailing \r\n
2675 * and see if this now generates a valid one.
2677 * This hack shouldn't have any impacts. If we've
2678 * already transmitted the header or if this is a
2679 * SSL connection, then we won't bother with this
2680 * hack. So we only work on partially received
2681 * headers. If we append a \r\n and this still
2682 * doesn't generate a valid header, then we won't
2683 * transmit anything to the client.
2688 if (server_body || http->ssl)
2691 * If we have been buffering up the document,
2692 * now is the time to apply content modification
2693 * and send the result to the client.
2697 p = execute_content_filter(csp, content_filter);
2699 * If the content filter fails, use the original
2700 * buffer and length.
2701 * (see p != NULL ? p : csp->iob->cur below)
2705 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2708 if (JB_ERR_OK != update_server_headers(csp))
2710 log_error(LOG_LEVEL_FATAL,
2711 "Failed to update server headers. after filtering.");
2714 hdr = list_to_text(csp->headers);
2717 /* FIXME Should handle error properly */
2718 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2721 if (write_socket(csp->cfd, hdr, strlen(hdr))
2722 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
2724 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2734 break; /* "game over, man" */
2738 * This is NOT the body, so
2739 * Let's pretend the server just sent us a blank line.
2741 snprintf(buf, sizeof(buf), "\r\n");
2742 len = (int)strlen(buf);
2745 * Now, let the normal header parsing algorithm below do its
2746 * job. If it fails, we'll exit instead of continuing.
2753 * If this is an SSL connection or we're in the body
2754 * of the server document, just write it to the client,
2755 * unless we need to buffer the body for later content-filtering
2757 if (server_body || http->ssl)
2762 * If there is no memory left for buffering the content, or the buffer limit
2763 * has been reached, switch to non-filtering mode, i.e. make & write the
2764 * header, flush the iob and buf, and get out of the way.
2766 if (add_to_iob(csp, buf, len))
2771 log_error(LOG_LEVEL_INFO,
2772 "Flushing header and buffers. Stepping back from filtering.");
2774 hdr = list_to_text(csp->headers);
2778 * Memory is too tight to even generate the header.
2779 * Send our static "Out-of-memory" page.
2781 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2782 rsp = cgi_error_memory();
2783 send_crunch_response(csp, rsp);
2786 hdrlen = strlen(hdr);
2788 if (write_socket(csp->cfd, hdr, hdrlen)
2789 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
2790 || (write_socket(csp->cfd, buf, (size_t)len)))
2792 log_error(LOG_LEVEL_CONNECT,
2793 "Flush header and buffers to client failed: %E");
2799 * Reset the byte_count to the amount of bytes
2800 * we just flushed. len will be added a few lines below,
2801 * hdrlen doesn't matter for LOG_LEVEL_CLF.
2803 byte_count = (size_t)flushed;
2805 content_filter = NULL;
2811 if (write_socket(csp->cfd, buf, (size_t)len))
2813 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2817 byte_count += (size_t)len;
2822 const char *header_start;
2824 * We're still looking for the end of the server's header.
2825 * Buffer up the data we just read. If that fails, there's
2826 * little we can do but send our static out-of-memory page.
2828 if (add_to_iob(csp, buf, len))
2830 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2831 rsp = cgi_error_memory();
2832 send_crunch_response(csp, rsp);
2836 header_start = csp->iob->cur;
2838 /* Convert iob into something sed() can digest */
2839 if (JB_ERR_PARSE == get_server_headers(csp))
2844 * Well, we tried our MS IIS/5 hack and it didn't work.
2845 * The header is incomplete and there isn't anything
2846 * we can do about it.
2848 log_error(LOG_LEVEL_INFO,
2849 "MS IIS5 hack didn't produce valid headers.");
2855 * Since we have to wait for more from the server before
2856 * we can parse the headers we just continue here.
2862 /* Did we actually get anything? */
2863 if (NULL == csp->headers->first)
2865 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
2866 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2867 write_socket(csp->cfd, NO_SERVER_DATA_RESPONSE, strlen(NO_SERVER_DATA_RESPONSE));
2868 free_http_request(http);
2872 assert(csp->headers->first->str);
2874 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
2875 strncmpic(csp->headers->first->str, "ICY", 3))
2878 * It doesn't look like a HTTP (or Shoutcast) response:
2879 * tell the client and log the problem.
2881 if (strlen(csp->headers->first->str) > 30)
2883 csp->headers->first->str[30] = '\0';
2885 log_error(LOG_LEVEL_ERROR,
2886 "Invalid server or forwarder response. Starts with: %s",
2887 csp->headers->first->str);
2888 log_error(LOG_LEVEL_CLF,
2889 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2890 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2891 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2892 free_http_request(http);
2897 * We have now received the entire server header,
2898 * filter it and send the result to the client
2900 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
2902 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
2904 hdr = list_to_text(csp->headers);
2907 /* FIXME Should handle error properly */
2908 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2911 if (crunch_response_triggered(csp, crunchers_light))
2914 * One of the tags created by a server-header
2915 * tagger triggered a crunch. We already
2916 * delivered the crunch response to the client
2917 * and are done here after cleaning up.
2922 /* Buffer and pcrs filter this if appropriate. */
2924 if (!http->ssl) /* We talk plaintext */
2926 content_filter = get_filter_function(csp);
2929 * Only write if we're not buffering for content modification
2931 if (!content_filter)
2934 * Write the server's (modified) header to
2935 * the client (along with anything else that
2936 * may be in the buffer)
2939 if (write_socket(csp->cfd, hdr, strlen(hdr))
2940 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
2942 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
2945 * The write failed, so don't bother mentioning it
2946 * to the client... it probably can't hear us anyway.
2952 byte_count += (size_t)len;
2957 * XXX: the header lenght should probably
2958 * be calculated by get_server_headers().
2960 int header_length = csp->iob->cur - header_start;
2961 assert(csp->iob->cur > header_start);
2962 byte_count += (size_t)len - header_length;
2965 /* we're finished with the server's header */
2971 * If this was a MS IIS/5 hack then it means the server
2972 * has already closed the connection. Nothing more to read.
2977 log_error(LOG_LEVEL_INFO,
2978 "Closed server connection detected with MS IIS5 hack enabled.");
2985 * If we reach this point, the server socket is tainted
2986 * (most likely because we didn't read everything the
2987 * server sent us) and reusing it would lead to garbage.
2989 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
2991 log_error(LOG_LEVEL_CONNECT, "Unsetting keep-alive flag.");
2992 csp->flags &= ~CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE;
2997 if (csp->content_length == 0)
3000 * If Privoxy didn't recalculate the Content-Lenght,
3001 * byte_count is still correct.
3003 csp->content_length = byte_count;
3006 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
3007 csp->ip_addr_str, http->ocmd, csp->content_length);
3011 /*********************************************************************
3015 * Description : This is little more than chat. We only "serve" to
3016 * to close any socket that chat may have opened.
3019 * 1 : csp = Current client state (buffers, headers, etc...)
3023 *********************************************************************/
3025 void serve(struct client_state *csp)
3026 #else /* ifndef AMIGA */
3027 static void serve(struct client_state *csp)
3028 #endif /* def AMIGA */
3031 close_socket(csp->cfd);
3033 if (csp->sfd != JB_INVALID_SOCKET)
3035 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3036 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
3038 remember_connection(csp->sfd, csp->http, forward_url(csp, csp->http));
3042 forget_connection(csp->sfd);
3043 close_socket(csp->sfd);
3046 close_socket(csp->sfd);
3047 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3050 csp->flags &= ~CSP_FLAG_ACTIVE;
3056 /*********************************************************************
3058 * Function : server_thread
3060 * Description : We only exist to call `serve' in a threaded environment.
3063 * 1 : data = Current client state (buffers, headers, etc...)
3065 * Returns : Always 0.
3067 *********************************************************************/
3068 static int32 server_thread(void *data)
3070 serve((struct client_state *) data);
3077 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3078 /*********************************************************************
3082 * Description : Print usage info & exit.
3084 * Parameters : Pointer to argv[0] for identifying ourselves
3088 *********************************************************************/
3089 static void usage(const char *myname)
3091 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
3095 #endif /* defined(unix) */
3098 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
3099 #endif /* defined(unix) */
3100 "[--version] [configfile]\n"
3101 "Aborting\n", myname);
3106 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
3109 #ifdef MUTEX_LOCKS_AVAILABLE
3110 /*********************************************************************
3112 * Function : privoxy_mutex_lock
3114 * Description : Locks a mutex.
3117 * 1 : mutex = The mutex to lock.
3119 * Returns : Void. May exit in case of errors.
3121 *********************************************************************/
3122 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
3124 #ifdef FEATURE_PTHREAD
3125 int err = pthread_mutex_lock(mutex);
3128 if (mutex != &log_mutex)
3130 log_error(LOG_LEVEL_FATAL,
3131 "Mutex locking failed: %s.\n", strerror(err));
3136 EnterCriticalSection(mutex);
3137 #endif /* def FEATURE_PTHREAD */
3141 /*********************************************************************
3143 * Function : privoxy_mutex_unlock
3145 * Description : Unlocks a mutex.
3148 * 1 : mutex = The mutex to unlock.
3150 * Returns : Void. May exit in case of errors.
3152 *********************************************************************/
3153 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
3155 #ifdef FEATURE_PTHREAD
3156 int err = pthread_mutex_unlock(mutex);
3159 if (mutex != &log_mutex)
3161 log_error(LOG_LEVEL_FATAL,
3162 "Mutex unlocking failed: %s.\n", strerror(err));
3167 LeaveCriticalSection(mutex);
3168 #endif /* def FEATURE_PTHREAD */
3172 /*********************************************************************
3174 * Function : privoxy_mutex_init
3176 * Description : Prepares a mutex.
3179 * 1 : mutex = The mutex to initialize.
3181 * Returns : Void. May exit in case of errors.
3183 *********************************************************************/
3184 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
3186 #ifdef FEATURE_PTHREAD
3187 int err = pthread_mutex_init(mutex, 0);
3190 printf("Fatal error. Mutex initialization failed: %s.\n",
3195 InitializeCriticalSection(mutex);
3196 #endif /* def FEATURE_PTHREAD */
3198 #endif /* def MUTEX_LOCKS_AVAILABLE */
3200 /*********************************************************************
3202 * Function : initialize_mutexes
3204 * Description : Prepares mutexes if mutex support is available.
3208 * Returns : Void, exits in case of errors.
3210 *********************************************************************/
3211 static void initialize_mutexes(void)
3213 #ifdef MUTEX_LOCKS_AVAILABLE
3215 * Prepare global mutex semaphores
3217 privoxy_mutex_init(&log_mutex);
3218 privoxy_mutex_init(&log_init_mutex);
3219 privoxy_mutex_init(&connection_reuse_mutex);
3222 * XXX: The assumptions below are a bit naive
3223 * and can cause locks that aren't necessary.
3225 * For example older FreeBSD versions (< 6.x?)
3226 * have no gethostbyname_r, but gethostbyname is
3229 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
3230 privoxy_mutex_init(&resolver_mutex);
3231 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
3233 * XXX: should we use a single mutex for
3234 * localtime() and gmtime() as well?
3236 #ifndef HAVE_GMTIME_R
3237 privoxy_mutex_init(&gmtime_mutex);
3238 #endif /* ndef HAVE_GMTIME_R */
3240 #ifndef HAVE_LOCALTIME_R
3241 privoxy_mutex_init(&localtime_mutex);
3242 #endif /* ndef HAVE_GMTIME_R */
3245 privoxy_mutex_init(&rand_mutex);
3246 #endif /* ndef HAVE_RANDOM */
3247 #endif /* def MUTEX_LOCKS_AVAILABLE */
3251 /*********************************************************************
3255 * Description : Load the config file and start the listen loop.
3256 * This function is a lot more *sane* with the `load_config'
3257 * and `listen_loop' functions; although it stills does
3258 * a *little* too much for my taste.
3261 * 1 : argc = Number of parameters (including $0).
3262 * 2 : argv = Array of (char *)'s to the parameters.
3264 * Returns : 1 if : can't open config file, unrecognized directive,
3265 * stats requested in multi-thread mode, can't open the
3266 * log file, can't open the jar file, listen port is invalid,
3267 * any load fails, and can't bind port.
3269 * Else main never returns, the process must be signaled
3270 * to terminate execution. Or, on Windows, use the
3271 * "File", "Exit" menu option.
3273 *********************************************************************/
3275 int real_main(int argc, const char *argv[])
3277 int main(int argc, const char *argv[])
3281 unsigned int random_seed;
3283 struct passwd *pw = NULL;
3284 struct group *grp = NULL;
3287 char *pre_chroot_nslookup_to_load_resolver = NULL;
3294 #if !defined(_WIN32)
3302 * Parse the command line arguments
3304 * XXX: simply printing usage information in case of
3305 * invalid arguments isn't particularly user friendly.
3307 while (++argc_pos < argc)
3310 /* Check to see if the service must be installed or uninstalled */
3311 if (strncmp(argv[argc_pos], "--install", 9) == 0)
3313 const char *pName = argv[argc_pos] + 9;
3316 exit( (install_service(pName)) ? 0 : 1 );
3318 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
3320 const char *pName = argv[argc_pos] + 11;
3323 exit((uninstall_service(pName)) ? 0 : 1);
3325 else if (strcmp(argv[argc_pos], "--service" ) == 0)
3327 bRunAsService = TRUE;
3328 w32_set_service_cwd();
3329 atexit(w32_service_exit_notify);
3332 #endif /* defined(_WIN32) */
3335 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3337 if (strcmp(argv[argc_pos], "--help") == 0)
3342 else if(strcmp(argv[argc_pos], "--version") == 0)
3344 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
3350 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
3355 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
3357 if (++argc_pos == argc) usage(argv[0]);
3358 pidfile = strdup(argv[argc_pos]);
3361 else if (strcmp(argv[argc_pos], "--user" ) == 0)
3363 if (++argc_pos == argc) usage(argv[argc_pos]);
3365 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
3368 if (NULL == (grp = getgrnam(p)))
3370 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
3374 if (NULL == (pw = getpwnam(argv[argc_pos])))
3376 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
3379 if (p != NULL) *--p = '\0';
3382 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
3384 if (++argc_pos == argc) usage(argv[0]);
3385 pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
3388 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
3392 #endif /* defined(unix) */
3394 else if (argc_pos + 1 != argc)
3397 * This is neither the last command line
3398 * option, nor was it recognized before,
3399 * therefore it must be invalid.
3405 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3407 configfile = argv[argc_pos];
3410 } /* -END- while (more arguments) */
3413 if ( *configfile != '/' )
3415 char cwd[BUFFER_SIZE];
3417 size_t abs_file_size;
3419 /* make config-filename absolute here */
3420 if (NULL == getcwd(cwd, sizeof(cwd)))
3422 perror("failed to get current working directory");
3427 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3428 basedir = strdup(cwd);
3430 if (NULL == basedir ||
3431 NULL == (abs_file = malloc(abs_file_size)))
3433 perror("malloc failed");
3436 strlcpy(abs_file, basedir, abs_file_size);
3437 strlcat(abs_file, "/", abs_file_size );
3438 strlcat(abs_file, configfile, abs_file_size);
3439 configfile = abs_file;
3441 #endif /* defined unix */
3445 clients->next = NULL;
3447 /* XXX: factor out initialising after the next stable release. */
3450 #elif defined(_WIN32)
3454 /* Prepare mutexes if supported and necessary. */
3455 initialize_mutexes();
3457 /* Enable logging until further notice. */
3458 init_log_module(Argv[0]);
3460 random_seed = (unsigned int)time(NULL);
3462 srandom(random_seed);
3465 #endif /* ifdef HAVE_RANDOM */
3468 * Unix signal handling
3470 * Catch the abort, interrupt and terminate signals for a graceful exit
3471 * Catch the hangup signal so the errlog can be reopened.
3472 * Ignore the broken pipe signals (FIXME: Why?)
3474 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3477 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3478 const int ignored_signals[] = { SIGPIPE, 0 };
3480 for (idx = 0; catched_signals[idx] != 0; idx++)
3482 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3483 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3485 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3486 #endif /* ifdef sun */
3488 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3492 for (idx = 0; ignored_signals[idx] != 0; idx++)
3494 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3496 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3501 #else /* ifdef _WIN32 */
3502 # ifdef _WIN_CONSOLE
3504 * We *are* in a windows console app.
3505 * Print a verbose messages about FAQ's and such
3507 printf("%s", win32_blurb);
3508 # endif /* def _WIN_CONSOLE */
3509 #endif /* def _WIN32 */
3512 /* Initialize the CGI subsystem */
3513 cgi_init_error_messages();
3516 * If runnig on unix and without the --nodaemon
3517 * option, become a daemon. I.e. fork, detach
3518 * from tty and get process group leadership
3531 if ( pid < 0 ) /* error */
3536 else if ( pid != 0 ) /* parent */
3541 * must check for errors
3542 * child died due to missing files aso
3545 wpid = waitpid( pid, &status, WNOHANG );
3554 /* Should be more portable, but not as well tested */
3559 #else /* ndef __FreeBSD__ */
3561 #endif /* ndef __FreeBSD__ */
3562 fd = open("/dev/tty", O_RDONLY);
3565 /* no error check here */
3566 ioctl( fd, TIOCNOTTY,0 );
3571 * stderr (fd 2) will be closed later on, when the
3572 * log file has been parsed.
3579 } /* -END- if (!no_daemon) */
3582 * As soon as we have written the PID file, we can switch
3583 * to the user and group ID indicated by the --user option
3589 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3591 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3597 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3599 /* Read the time zone file from /etc before doing chroot. */
3601 if (NULL != pre_chroot_nslookup_to_load_resolver
3602 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3604 /* Initialize resolver library. */
3605 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3607 if (chroot(pw->pw_dir) < 0)
3609 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3613 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3616 if (setuid(pw->pw_uid))
3618 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3622 char putenv_dummy[64];
3624 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3625 if (putenv(putenv_dummy) != 0)
3627 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3630 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3631 if (putenv(putenv_dummy) != 0)
3633 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3639 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3642 #endif /* defined unix */
3645 /* This will be FALSE unless the command line specified --service
3649 /* Yup, so now we must attempt to establish a connection
3650 * with the service dispatcher. This will only work if this
3651 * process was launched by the service control manager to
3652 * actually run as a service. If this isn't the case, i've
3653 * known it take around 30 seconds or so for the call to return.
3656 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3657 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3659 /* Service has run, and at this point is now being stopped, so just return */
3664 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3666 /* An error occurred. Usually it's because --service was wrongly specified
3667 * and we were unable to connect to the Service Control Dispatcher because
3668 * it wasn't expecting us and is therefore not listening.
3670 * For now, just continue below to call the listen_loop function.
3673 #endif /* def _WIN32 */
3683 /*********************************************************************
3685 * Function : bind_port_helper
3687 * Description : Bind the listen port. Handles logging, and aborts
3691 * 1 : config = Privoxy configuration. Specifies port
3694 * Returns : Port that was opened.
3696 *********************************************************************/
3697 static jb_socket bind_port_helper(struct configuration_spec * config)
3702 if (config->haddr == NULL)
3704 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3709 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3710 config->hport, config->haddr);
3713 result = bind_port(config->haddr, config->hport, &bfd);
3720 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3721 "There may be another Privoxy or some other "
3722 "proxy running on port %d",
3723 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
3724 config->hport, config->hport);
3727 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3728 "The hostname is not resolvable",
3729 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3732 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
3733 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3736 /* shouldn't get here */
3737 return JB_INVALID_SOCKET;
3740 config->need_bind = 0;
3747 /* Without this simple workaround we get this compiler warning from _beginthread
3748 * warning C4028: formal parameter 1 different from declaration
3750 void w32_service_listen_loop(void *p)
3754 #endif /* def _WIN32 */
3757 /*********************************************************************
3759 * Function : listen_loop
3761 * Description : bind the listen port and enter a "FOREVER" listening loop.
3767 *********************************************************************/
3768 static void listen_loop(void)
3770 struct client_state *csp = NULL;
3772 struct configuration_spec * config;
3774 config = load_config();
3776 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3778 * XXX: Should be relocated once it no
3779 * longer needs to emit log messages.
3781 initialize_reusable_connections();
3782 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3784 bfd = bind_port_helper(config);
3786 #ifdef FEATURE_GRACEFUL_TERMINATION
3787 while (!g_terminate)
3792 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
3793 while (waitpid(-1, NULL, WNOHANG) > 0)
3795 /* zombie children */
3797 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
3800 * Free data that was used by died threads
3806 * Re-open the errlog after HUP signal
3808 if (received_hup_signal)
3810 if (NULL != config->logfile)
3812 init_error_log(Argv[0], config->logfile);
3814 received_hup_signal = 0;
3818 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
3820 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
3824 csp->flags |= CSP_FLAG_ACTIVE;
3825 csp->sfd = JB_INVALID_SOCKET;
3827 csp->config = config = load_config();
3829 if ( config->need_bind )
3832 * Since we were listening to the "old port", we will not see
3833 * a "listen" param change until the next IJB request. So, at
3834 * least 1 more request must be made for us to find the new
3835 * setting. I am simply closing the old socket and binding the
3838 * Which-ever is correct, we will serve 1 more page via the
3839 * old settings. This should probably be a "show-proxy-args"
3840 * request. This should not be a so common of an operation
3841 * that this will hurt people's feelings.
3846 bfd = bind_port_helper(config);
3849 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
3851 if (!accept_connection(csp, bfd))
3853 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
3866 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
3869 #ifdef FEATURE_TOGGLE
3870 if (global_toggle_state)
3871 #endif /* def FEATURE_TOGGLE */
3873 csp->flags |= CSP_FLAG_TOGGLED_ON;
3876 if (run_loader(csp))
3878 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
3879 /* Never get here - LOG_LEVEL_FATAL causes program exit */
3883 if (block_acl(NULL,csp))
3885 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
3886 close_socket(csp->cfd);
3890 #endif /* def FEATURE_ACL */
3892 /* add it to the list of clients */
3893 csp->next = clients->next;
3894 clients->next = csp;
3896 if (config->multi_threaded)
3900 /* this is a switch () statment in the C preprocessor - ugh */
3901 #undef SELECTED_ONE_OPTION
3903 /* Use Pthreads in preference to native code */
3904 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
3905 #define SELECTED_ONE_OPTION
3907 pthread_t the_thread;
3908 pthread_attr_t attrs;
3910 pthread_attr_init(&attrs);
3911 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
3912 errno = pthread_create(&the_thread, &attrs,
3913 (void * (*)(void *))serve, csp);
3914 child_id = errno ? -1 : 0;
3915 pthread_attr_destroy(&attrs);
3919 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
3920 #define SELECTED_ONE_OPTION
3921 child_id = _beginthread(
3922 (void (*)(void *))serve,
3927 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
3928 #define SELECTED_ONE_OPTION
3929 child_id = _beginthread(
3930 (void(* _Optlink)(void*))serve,
3936 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
3937 #define SELECTED_ONE_OPTION
3939 thread_id tid = spawn_thread
3940 (server_thread, "server", B_NORMAL_PRIORITY, csp);
3942 if ((tid >= 0) && (resume_thread(tid) == B_OK))
3944 child_id = (int) tid;
3953 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
3954 #define SELECTED_ONE_OPTION
3955 csp->cfd = ReleaseSocket(csp->cfd, -1);
3958 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3959 NP_Output, Output(),
3960 NP_CloseOutput, FALSE,
3961 NP_Name, (ULONG)"privoxy child",
3965 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3966 NP_Output, Output(),
3967 NP_CloseOutput, FALSE,
3968 NP_Name, (ULONG)"privoxy child",
3969 NP_StackSize, 200*1024,
3975 ((struct Task *)child_id)->tc_UserData = csp;
3976 Signal((struct Task *)child_id, SIGF_SINGLE);
3981 #if !defined(SELECTED_ONE_OPTION)
3984 /* This block is only needed when using fork().
3985 * When using threads, the server thread was
3986 * created and run by the call to _beginthread().
3988 if (child_id == 0) /* child */
3991 #ifdef FEATURE_TOGGLE
3992 int inherited_toggle_state = global_toggle_state;
3993 #endif /* def FEATURE_TOGGLE */
3998 * If we've been toggled or we've blocked the request, tell Mom
4001 #ifdef FEATURE_TOGGLE
4002 if (inherited_toggle_state != global_toggle_state)
4004 rc |= RC_FLAG_TOGGLED;
4006 #endif /* def FEATURE_TOGGLE */
4008 #ifdef FEATURE_STATISTICS
4009 if (csp->flags & CSP_FLAG_REJECTED)
4011 rc |= RC_FLAG_BLOCKED;
4013 #endif /* ndef FEATURE_STATISTICS */
4017 else if (child_id > 0) /* parent */
4019 /* in a fork()'d environment, the parent's
4020 * copy of the client socket and the CSP
4024 #if !defined(_WIN32) && !defined(__CYGWIN__)
4026 wait( &child_status );
4029 * Evaluate child's return code: If the child has
4030 * - been toggled, toggle ourselves
4031 * - blocked its request, bump up the stats counter
4034 #ifdef FEATURE_TOGGLE
4035 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
4037 global_toggle_state = !global_toggle_state;
4039 #endif /* def FEATURE_TOGGLE */
4041 #ifdef FEATURE_STATISTICS
4043 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
4047 #endif /* def FEATURE_STATISTICS */
4049 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
4050 close_socket(csp->cfd);
4051 csp->flags &= ~CSP_FLAG_ACTIVE;
4055 #undef SELECTED_ONE_OPTION
4056 /* end of cpp switch () */
4058 if (child_id < 0) /* failed */
4060 char buf[BUFFER_SIZE];
4062 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
4064 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
4066 write_socket(csp->cfd, buf, strlen(buf));
4067 close_socket(csp->cfd);
4068 csp->flags &= ~CSP_FLAG_ACTIVE;
4079 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
4081 /* Clean up. Aim: free all memory (no leaks) */
4082 #ifdef FEATURE_GRACEFUL_TERMINATION
4084 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
4086 unload_current_config_file();
4087 unload_current_actions_file();
4088 unload_current_re_filterfile();
4089 #ifdef FEATURE_TRUST
4090 unload_current_trust_file();
4093 if (config->multi_threaded)
4100 } while ((clients->next != NULL) && (--i > 0));
4104 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
4115 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
4116 /* Cleanup - remove taskbar icon etc. */
4121 #endif /* FEATURE_GRACEFUL_TERMINATION */