1 const char jcc_rcs[] = "$Id: jcc.c,v 1.198 2008/10/22 15:19:55 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 1.198 2008/10/22 15:19:55 fabiankeil
37 * Once More, With Feeling: if there is no logfile
38 * because the user didn't specify one, we shouldn't
39 * call init_error_log() after receiving SIGHUP either.
41 * Revision 1.197 2008/10/20 17:02:40 fabiankeil
42 * If SIGHUP is received while we aren't running in daemon
43 * mode, calling init_error_log() would be a mistake.
45 * Revision 1.196 2008/10/16 09:16:41 fabiankeil
46 * - Fix two gcc44 conversion warnings.
47 * - Don't bother logging the last five bytes
50 * Revision 1.195 2008/10/13 16:04:37 fabiankeil
51 * Make sure we don't try to reuse tainted server sockets.
53 * Revision 1.194 2008/10/12 18:35:18 fabiankeil
54 * The last commit was a bit too ambitious, apparently the content
55 * length adjustment is only necessary if we aren't buffering.
57 * Revision 1.193 2008/10/12 15:57:35 fabiankeil
58 * Fix content length calculation if we read headers
59 * and the start of the body at once. Now that we have
60 * FEATURE_CONNECTION_KEEP_ALIVE, it actually matters.
62 * Revision 1.192 2008/10/11 18:19:14 fabiankeil
63 * Even more chat() cosmetics.
65 * Revision 1.191 2008/10/11 18:00:14 fabiankeil
66 * Reformat some comments in chat().
68 * Revision 1.190 2008/10/11 14:58:00 fabiankeil
69 * In case of chunk-encoded content, stop reading if
70 * the buffer looks like it ends with the last chunk.
72 * Revision 1.189 2008/10/11 09:53:00 fabiankeil
73 * Let server_response_is_complete() deal properly with
74 * content that is neither buffered nor read all at once.
76 * Revision 1.188 2008/10/09 18:21:41 fabiankeil
77 * Flush work-in-progress changes to keep outgoing connections
78 * alive where possible. Incomplete and mostly #ifdef'd out.
80 * Revision 1.187 2008/09/07 12:35:05 fabiankeil
81 * Add mutex lock support for _WIN32.
83 * Revision 1.186 2008/09/04 08:13:58 fabiankeil
84 * Prepare for critical sections on Windows by adding a
85 * layer of indirection before the pthread mutex functions.
87 * Revision 1.185 2008/08/30 12:03:07 fabiankeil
88 * Remove FEATURE_COOKIE_JAR.
90 * Revision 1.184 2008/08/22 15:34:45 fabiankeil
91 * - Silence LLVM/Clang complaint.
92 * - Make received_hup_signal static.
93 * - Hide definitions for basedir, pidfile and received_hup_signal
94 * from __EMX__ as they only seem to be used in case of #ifdef unix.
96 * Revision 1.183 2008/08/21 07:09:35 fabiankeil
97 * Accept Shoutcast responses again. Problem reported
98 * and fix suggested by Stefan in #2062860.
100 * Revision 1.182 2008/06/27 11:13:56 fabiankeil
101 * Fix possible NULL-pointer dereference reported
102 * by din_a4 in #2003937. Pointy hat to me.
104 * Revision 1.181 2008/05/21 15:47:15 fabiankeil
105 * Streamline sed()'s prototype and declare
106 * the header parse and add structures static.
108 * Revision 1.180 2008/05/21 15:26:32 fabiankeil
109 * - Mark csp as immutable for send_crunch_response().
110 * - Fix comment spelling.
112 * Revision 1.179 2008/05/20 20:13:32 fabiankeil
113 * Factor update_server_headers() out of sed(), ditch the
114 * first_run hack and make server_patterns_light static.
116 * Revision 1.178 2008/05/10 13:23:38 fabiankeil
117 * Don't provide get_header() with the whole client state
118 * structure when it only needs access to csp->iob.
120 * Revision 1.177 2008/05/10 11:51:12 fabiankeil
121 * Make the "read the rest of the headers" loop a bit more readable.
123 * Revision 1.176 2008/05/10 11:37:57 fabiankeil
124 * - Instead of logging when the IIS5 hack is enabled, log when it fails.
125 * - Remove useless comment.
127 * Revision 1.175 2008/05/09 18:53:59 fabiankeil
128 * Fix comment grammar.
130 * Revision 1.174 2008/05/07 18:05:53 fabiankeil
131 * Remove the pointless buffer in client_protocol_is_unsupported().
133 * Revision 1.173 2008/05/06 15:09:00 fabiankeil
134 * Least-effort fix for bug #1821930 (reported by Lee):
135 * If the response doesn't look like HTTP,
136 * tell the client and log the problem.
138 * Revision 1.172 2008/04/16 16:38:21 fabiankeil
139 * Don't pass the whole csp structure to flush_socket()
140 * when it only needs a file descriptor and a buffer.
142 * Revision 1.171 2008/03/27 18:27:25 fabiankeil
143 * Remove kill-popups action.
145 * Revision 1.170 2008/03/06 16:33:46 fabiankeil
146 * If limit-connect isn't used, don't limit CONNECT requests to port 443.
148 * Revision 1.169 2008/03/04 18:30:39 fabiankeil
149 * Remove the treat-forbidden-connects-like-blocks action. We now
150 * use the "blocked" page for forbidden CONNECT requests by default.
152 * Revision 1.168 2008/03/02 12:25:25 fabiankeil
153 * Also use shiny new connect_port_is_forbidden() in jcc.c.
155 * Revision 1.167 2008/02/23 16:57:12 fabiankeil
156 * Rename url_actions() to get_url_actions() and let it
157 * use the standard parameter ordering.
159 * Revision 1.166 2008/02/23 16:33:43 fabiankeil
160 * Let forward_url() use the standard parameter ordering
161 * and mark its second parameter immutable.
163 * Revision 1.165 2008/02/02 19:36:56 fabiankeil
164 * Remove the "Listening ... for local connections only" log message.
165 * Whether or not remote connections are able to reach Privoxy is up
166 * to the operating system.
168 * Revision 1.164 2007/12/16 18:32:46 fabiankeil
169 * Prevent the log messages for CONNECT requests to unacceptable
170 * ports from printing the limit-connect argument as [null] if
171 * limit-connect hasn't been explicitly enabled.
173 * Revision 1.163 2007/12/13 01:47:11 david__schmidt
174 * Make sure all console-mode apps get a usage() instance
176 * Revision 1.162 2007/12/06 17:54:57 fabiankeil
177 * Reword NO_SERVER_DATA_RESPONSE to make it harder
178 * to misunderstand what the message is all about.
180 * Revision 1.161 2007/12/04 19:44:22 fabiankeil
181 * Unbreak trustfile which previously didn't work without
182 * FEATURE_TOGGLE. Fixes BR#1843585, reported by Lee.
184 * Revision 1.160 2007/11/29 18:00:29 fabiankeil
185 * Plug memory leak. Spotted by Valgrind, triggered by
186 * Privoxy-Regression-Test feeding proxyfuzz.py.
188 * Revision 1.159 2007/11/24 14:34:09 fabiankeil
189 * In the HTTP snipplets, refer to the client as client.
191 * Revision 1.158 2007/11/11 16:44:17 fabiankeil
192 * Emit a log message when activating the MS IIS5 hack.
194 * Revision 1.157 2007/11/03 17:34:49 fabiankeil
195 * Log the "weak randomization factor" warning only
196 * once for mingw32 and provide some more details.
198 * Revision 1.156 2007/11/01 18:20:58 fabiankeil
199 * Initialize log module after initializing mutexes, future
200 * deadlocks in that code should now work cross-platform.
202 * Revision 1.155 2007/10/23 20:12:45 fabiankeil
203 * Fix first CSUCCEED line to end in \r\n as required by RFC1945.
204 * Reported by Bert van Leeuwen in BR#1818808.
206 * Revision 1.154 2007/10/19 17:00:08 fabiankeil
207 * Downgrade "Flushing header and buffers" message to LOG_LEVEL_INFO.
209 * Revision 1.153 2007/10/14 14:12:41 fabiankeil
210 * When in daemon mode, close stderr after the configuration file has been
211 * parsed the first time. If logfile isn't set, stop logging. Fixes BR#897436.
213 * Revision 1.152 2007/10/04 18:03:34 fabiankeil
214 * - Fix a crash when parsing invalid requests whose first header
215 * is rejected by get_header(). Regression (re?)introduced
216 * in r1.143 by yours truly.
217 * - Move ACTION_VANILLA_WAFER handling into parsers.c's
218 * client_cookie_adder() to make sure send-vanilla-wafer can be
219 * controlled through tags (and thus regression-tested).
221 * Revision 1.151 2007/09/29 10:21:16 fabiankeil
222 * - Move get_filter_function() from jcc.c to filters.c
223 * so the filter functions can be static.
224 * - Don't bother filtering body-less responses.
226 * Revision 1.150 2007/09/28 16:39:29 fabiankeil
227 * Execute content filters through execute_content_filter().
229 * Revision 1.149 2007/09/04 15:08:48 fabiankeil
230 * Initialize req to NULL to make sure it's defined if the
231 * first read_socket() call fails. Reported by icmp30.
233 * Revision 1.148 2007/08/26 16:47:13 fabiankeil
234 * Add Stephen Gildea's --pre-chroot-nslookup patch [#1276666],
235 * extensive comments moved to user manual.
237 * Revision 1.147 2007/08/25 14:42:40 fabiankeil
238 * Don't crash if a broken header filter wiped out the request line.
240 * Revision 1.146 2007/08/20 17:09:32 fabiankeil
241 * Fix byte_count calculation in case of flushes
242 * and don't parse the server headers a second time.
244 * Revision 1.145 2007/08/19 13:13:31 fabiankeil
245 * - If there's a connection problem after we already forwarded
246 * parts of the original content, just hang up. Fixes BR#1776724.
247 * - Fix warnings about unused code on mingw32.
248 * - In case of flushes, calculate the byte count
249 * less incorrectly (I think).
251 * Revision 1.144 2007/08/11 14:43:22 fabiankeil
252 * Add some more prototypes for static functions.
254 * Revision 1.143 2007/08/05 13:58:19 fabiankeil
255 * Comment out request_contains_null_bytes() until it's used again.
257 * Revision 1.142 2007/08/05 13:50:26 fabiankeil
258 * #1763173 from Stefan Huehner: s@const static@static const@
259 * and declare some more functions static.
261 * Revision 1.141 2007/08/04 09:56:23 fabiankeil
262 * - Log rejected CONNECT requests with LOG_LEVEL_INFO
263 * and explain why they were rejected in the first place.
264 * - Fix the LOG_LEVEL_CLF message for crunches of unallowed
265 * CONNECT requests. The request line was missing.
266 * - Add two more XXX reminders as we don't have enough already.
268 * Revision 1.140 2007/07/21 11:51:36 fabiankeil
269 * As Hal noticed, checking dispatch_cgi() as the last cruncher
270 * looks like a bug if CGI requests are blocked unintentionally,
271 * so don't do it unless the user enabled the new config option
272 * "allow-cgi-request-crunching".
274 * Revision 1.139 2007/07/14 07:46:41 fabiankeil
275 * - Allow to rewrite the request destination behind the client's back.
276 * - Turn the weird-looking unconditional for loop that
277 * reads the client request into a conditional while loop.
278 * Move the stuff that only runs once out of the loop.
279 * - Move parts of chat(), server_content_type() and the
280 * necessary stuff to fix BR#1750917 into get_filter_function().
282 * Revision 1.138 2007/06/03 18:45:18 fabiankeil
283 * Temporary workaround for BR#1730105.
285 * Revision 1.137 2007/06/01 18:16:36 fabiankeil
286 * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
287 * deadlocks and crashes on OpenBSD and possibly other OS with neither
288 * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
289 * Thanks to Ralf Horstmann for report and solution.
291 * Revision 1.136 2007/06/01 16:41:11 fabiankeil
292 * Add forward-override{} to change the forwarding settings through
293 * action sections. This is mainly interesting to forward different
294 * clients differently (for example based on User-Agent or request
297 * Revision 1.135 2007/05/24 17:03:50 fabiankeil
298 * - Let usage() mention the --chroot parameter.
299 * - Use read_socket() consistently and always leave
300 * the last buffer byte alone, even in cases where
301 * null termination (currently) doesn't matter.
303 * Revision 1.134 2007/05/16 14:59:46 fabiankeil
304 * - Fix config file loading on Unix if no config file is specified.
305 * Since r1.97 Privoxy would always interpret the last argument as
306 * config file, even if it's a valid command line option.
307 * - Abort in case of unrecognized command line options. Closes #1719696.
308 * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
309 * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
311 * Revision 1.133 2007/05/04 11:23:19 fabiankeil
312 * - Don't rerun crunchers that only depend on the request URL.
313 * - Don't count redirects and CGI requests as "blocked requests".
315 * Revision 1.132 2007/04/25 15:15:17 fabiankeil
316 * Support crunching based on tags created by server-header taggers.
318 * Revision 1.131 2007/04/22 13:24:50 fabiankeil
319 * Make HTTP snippets static (again). Add a Content-Type for those
320 * with content so the browser doesn't guess it based on the URL.
322 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
323 * Move crunching and request line rebuilding out of chat().
325 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
326 * Introduce tags as alternative way to specify which
327 * actions apply to a request. At the moment tags can be
328 * created based on client and server headers.
330 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
331 * Don't CLF-log CONNECT requests twice.
333 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
334 * Log the source address for ACL-related connection drops.
336 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
337 * New config option: enforce-blocks.
339 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
340 * - Move null byte check into separate function.
341 * - Don't confuse the client with error pages
342 * if a CONNECT request was already confirmed.
344 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
345 * Speed up NULL byte escaping and only log the complete
346 * NULL byte requests with header debugging enabled.
348 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
349 * Answer requests that contain NULL bytes with
350 * a custom response instead of waiting for more
351 * data until the client eventually hangs up.
353 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
354 * - Move delivery and logging of crunched responses
355 * from chat() into send_crunch_response().
356 * - Display the reason for generating http_responses.
357 * - Log the content length for LOG_LEVEL_CLF correctly
358 * (still incorrect for some fixed responses).
359 * - Reword an incorrect comment about
360 * treat-forbidden-connects-like-blocks violating
362 * - Add some log messages.
364 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
365 * Move mutex initialization into separate
366 * function and exit in case of errors.
368 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
369 * - Start to reduce chat()'s line count and move
370 * parts of it into separate functions.
371 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
373 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
374 * - Add Proxy-Agent header to HTTP snippets that are
375 * supposed to reach HTTP clients only.
376 * - Made a few CONNECT log messages more descriptive.
377 * - Catch completely empty server responses (as seen
378 * with Tor's fake ".noconnect" top level domain).
379 * - Use shiny new "forwarding-failed" template for socks errors.
381 * Revision 1.118 2007/01/07 07:43:43 joergs
382 * AmigaOS4 support added.
384 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
385 * Added config option accept-intercepted-requests
386 * and disabled it by default.
388 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
389 * Reverted parts of my last commit
390 * to keep error handling working.
392 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
393 * Fixed gcc43 conversion warnings.
395 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
396 * Fix -pedantic ISO C warning about converting
397 * from function pointer to object pointer.
399 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
400 * Silence compiler warning I introduced with my last commit.
402 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
403 * Mutex protect rand() if POSIX threading
404 * is used, warn the user if that's not possible
405 * and stop using it on _WIN32 where it could
408 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
409 * Don't prevent core dumps by catching SIGABRT.
410 * It's rude and makes debugging unreasonable painful.
412 * Revision 1.110 2006/12/13 14:52:53 etresoft
413 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
415 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
416 * Privoxy is now able to run as intercepting
417 * proxy in combination with any packet filter
418 * that does the port redirection. The destination
419 * is extracted from the "Host:" header which
420 * should be available for nearly all requests.
422 * Moved HTTP snipplets into jcc.c.
423 * Added error message for gopher proxy requests.
425 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
426 * Only unlink the pidfile if it's actually used.
428 * Change order of interception checks to make
429 * it possible to block or redirect requests for
432 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
433 * Make pthread mutex locking more generic. Instead of
434 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
435 * and use mutex locking unless there is an _r function
436 * available. Better safe than sorry.
438 * Fixes "./configure --disable-pthread" and should result
439 * in less threading-related problems on pthread-using platforms,
440 * but it still doesn't fix BR#1122404.
442 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
443 * Move pthread.h inclusion from jcc.c to jcc.h.
444 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
446 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
447 * Don't exit after receiving the second SIGHUP on Solaris.
449 * Fixes BR 1052235, but the same problem may exist on other
450 * systems. Once 3.0.6 is out we should use sigset()
451 * where available and see if it breaks anything.
453 * Revision 1.104 2006/09/23 13:26:38 roro
454 * Replace TABs by spaces in source code.
456 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
457 * Fix +redirect{}. Didn't work with -fast-redirects.
459 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
460 * Respond with 400 and a short text message
461 * if the client tries to use Privoxy as FTP proxy.
463 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
464 * Make number of retries in case of forwarded-connect problems
465 * a config file option (forwarded-connect-retries) and use 0 as
468 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
469 * Set random(3) seed.
471 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
472 * Follow the OpenBSD port's lead and protect the resolve
473 * functions on OpenBSD as well.
475 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
476 * --user fix. Only use the user as group if no group is specified.
477 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
479 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
480 * Windows service (re-)integration
484 * --install[:service_name]
485 * --uninstall[:service_name]
488 * They work as follows:
489 * --install will create a service for you and then terminate.
490 * By default the service name will be "privoxy" (without the quotes).
491 * However you can run multiple services if you wish, just by adding
492 * a colon and then a name (no spaces).
494 * --uninstall follows the exact same rules a --install.
496 * --service is used when the program is executed by the service
497 * control manager, and in normal circumstances would never be
498 * used as a command line argument.
500 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
501 * Windows service integration
503 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
504 * Incorporate Fabian Keil's patch work:
505 http://www.fabiankeil.de/sourcecode/privoxy/
507 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
508 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
509 * with what was really the latest development (the v_3_0_branch branch)
511 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
512 * Thanks to Jindrich Makovicka for a race condition fix for the log
513 * file. The race condition remains for non-pthread implementations.
514 * Reference patch #1175720.
516 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
517 * Add the ability to check jpeg images for invalid
518 * lengths of comment blocks. Defensive strategy
519 * against the exploit:
520 * Microsoft Security Bulletin MS04-028
521 * Buffer Overrun in JPEG Processing (GDI+) Could
522 * Allow Code Execution (833987)
523 * Enabled with +inspect-jpegs in actions files.
525 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
526 * - Fixed usage info for non-unix platforms
527 * - Fixed small cmdline parsing bug
529 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
530 * Diagnostics: Now preserve the returncode of pthread_create
531 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
533 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
534 * No longer ignore SIGCHLD. Fixes bug #769381
536 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
537 * Close jarfile on graceful exit, remove stray line
539 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
540 * Cosmetics: Killed a warning, a typo and an allocation left at exit
542 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
543 * No longer rely on non-POSIX.1 extensions of getcwd().
546 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
547 * Replaced setenv() by posix-compliant putenv()
548 * Thanks to Neil McCalden (nmcc AT users.sf.net).
550 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
551 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
553 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
554 * Clean-up and extension of improvements for forked mode:
555 * - Child's return code now consists of flags RC_FLAG_*
556 * - Reporting toggle to parent now properly #ifdef'ed
557 * - Children now report blocking to parent. This enables
558 * statistics in forked mode
560 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
561 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
562 * Children now report having been toggled through _exit(17), parents
563 * watch for that code and toggle themselves if found.
565 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
566 * Wrapping all *_r functions (the non-_r versions of them) with
567 * mutex semaphores for OSX. Hopefully this will take care of all
568 * of those pesky crash reports.
570 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
571 * Fixed two mostly harmless mem leaks
573 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
574 * Fix: Head of global clients list now initialized to NULL
576 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
577 * Added basic support for OPTIONS and TRACE HTTP methods:
578 * - New interceptor direct_response() added in chat().
579 * - sed() moved to earlier in the process, so that the
580 * Host: header is evaluated before actions and forwarding
583 * Revision 1.92 2002/05/08 16:00:46 oes
584 * Chat's buffer handling:
585 * - Fixed bug with unchecked out-of-mem conditions
586 * while reading client request & server headers
587 * - No longer predict if the buffer limit will be exceeded
588 * in the next read -- check add_to_iob's new
589 * return code. If buffer couldn't be extended
590 * (policy or out-of-mem) while
591 * - reading from client: abort
592 * - reading server headers: send error page
593 * - buffering server body for filter: flush,
594 * and if that fails: send error page
596 * Revision 1.91 2002/04/08 20:35:58 swa
599 * Revision 1.90 2002/04/02 14:57:28 oes
600 * Made sending wafers independent of FEATURE_COOKIE_JAR
602 * Revision 1.89 2002/03/31 17:18:59 jongfoster
603 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
605 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
606 * More compiler warning message maintenance
608 * Revision 1.87 2002/03/26 22:29:54 swa
609 * we have a new homepage!
611 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
612 * Workaround for closing the jarfile before load_config() comes around again
614 * Revision 1.85 2002/03/24 15:23:33 jongfoster
617 * Revision 1.84 2002/03/24 13:25:43 swa
618 * name change related issues
620 * Revision 1.83 2002/03/16 23:54:06 jongfoster
621 * Adding graceful termination feature, to help look for memory leaks.
622 * If you enable this (which, by design, has to be done by hand
623 * editing config.h) and then go to http://i.j.b/die, then the program
624 * will exit cleanly after the *next* request. It should free all the
625 * memory that was used.
627 * Revision 1.82 2002/03/13 00:27:05 jongfoster
630 * Revision 1.81 2002/03/12 01:42:50 oes
631 * Introduced modular filters
633 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
634 * OS/2 port maintenance:
635 * - Fixed EMX build - it had decayed a little
636 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
637 * substituted a memset for now.
639 * Revision 1.79 2002/03/09 20:03:52 jongfoster
640 * - Making various functions return int rather than size_t.
641 * (Undoing a recent change). Since size_t is unsigned on
642 * Windows, functions like read_socket that return -1 on
643 * error cannot return a size_t.
645 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
646 * crashes, and also frequently caused JB to jump to 100%
647 * CPU and stay there. (Because it thought it had just
648 * read ((unsigned)-1) == 4Gb of data...)
650 * - The signature of write_socket has changed, it now simply
651 * returns success=0/failure=nonzero.
653 * - Trying to get rid of a few warnings --with-debug on
654 * Windows, I've introduced a new type "jb_socket". This is
655 * used for the socket file descriptors. On Windows, this
656 * is SOCKET (a typedef for unsigned). Everywhere else, it's
657 * an int. The error value can't be -1 any more, so it's
658 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
659 * Windows it maps to the #define INVALID_SOCKET.)
661 * - The signature of bind_port has changed.
663 * Revision 1.78 2002/03/08 21:35:04 oes
664 * Added optional group supplement to --user option. Will now use default group of user if no group given
666 * Revision 1.77 2002/03/07 03:52:06 oes
667 * - Fixed compiler warnings etc
668 * - Improved handling of failed DNS lookups
670 * Revision 1.76 2002/03/06 22:54:35 jongfoster
671 * Automated function-comment nitpicking.
673 * Revision 1.75 2002/03/06 10:02:19 oes
674 * Fixed stupid bug when --user was not given
676 * Revision 1.74 2002/03/06 00:49:31 jongfoster
677 * Fixing warning on Windows
678 * Making #ifdefs that refer to the same variable consistently
679 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
681 * Revision 1.73 2002/03/05 23:57:30 hal9
682 * Stray character 's' on line 1618 was breaking build.
684 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
685 * - Re-enable OS/2 building after new parms were added
686 * - Fix false out of memory report when resolving CGI templates when no IP
687 * address is available of failed attempt (a la no such domain)
689 * Revision 1.71 2002/03/05 18:13:56 oes
690 * Added --user option
692 * Revision 1.70 2002/03/05 04:52:42 oes
693 * Deleted non-errlog debugging code
695 * Revision 1.69 2002/03/04 23:50:00 jongfoster
696 * Splitting off bind_port() call into bind_port_helper(), with
699 * Revision 1.68 2002/03/04 20:17:32 oes
702 * Revision 1.67 2002/03/04 18:18:57 oes
703 * - Removed _DEBUG mode
704 * - Cleand up cmdline parsing
705 * - Introduced --no-daemon, --pidfile options
706 * - Cleaned up signal handling:
707 * - Terminate cleanly on INT, TERM and ABRT
708 * - Schedule logfile for re-opening on HUP
709 * - Ignore CHLD and PIPE
710 * - Leave the rest with their default handlers
711 * - Uniform handler registration
712 * - Added usage() function
713 * - Played styleguide police
715 * Revision 1.66 2002/03/03 15:06:55 oes
716 * Re-enabled automatic config reloading
718 * Revision 1.65 2002/03/03 14:49:11 oes
719 * Fixed CLF logging: Now uses client's original HTTP request
721 * Revision 1.64 2002/03/03 09:18:03 joergs
722 * Made jumbjuster work on AmigaOS again.
724 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
725 * Clean up a little CRLF unpleasantness that suddenly appeared
727 * Revision 1.62 2002/02/20 23:17:23 jongfoster
728 * Detecting some out-of memory conditions and exiting with a log message.
730 * Revision 1.61 2002/01/17 21:01:52 jongfoster
731 * Moving all our URL and URL pattern parsing code to urlmatch.c.
733 * Revision 1.60 2001/12/30 14:07:32 steudten
734 * - Add signal handling (unix)
735 * - Add SIGHUP handler (unix)
736 * - Add creation of pidfile (unix)
737 * - Add action 'top' in rc file (RH)
738 * - Add entry 'SIGNALS' to manpage
739 * - Add exit message to logfile (unix)
741 * Revision 1.59 2001/12/13 14:07:18 oes
742 * Fixed Bug: 503 error page now sent OK
744 * Revision 1.58 2001/11/30 23:37:24 jongfoster
745 * Renaming the Win32 config file to config.txt - this is almost the
746 * same as the corresponding UNIX name "config"
748 * Revision 1.57 2001/11/16 00:47:43 jongfoster
749 * Changing the tty-disconnection code to use setsid().
751 * Revision 1.56 2001/11/13 20:20:54 jongfoster
752 * Tabs->spaces, fixing a bug with missing {} around an if()
754 * Revision 1.55 2001/11/13 20:14:53 jongfoster
755 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
757 * Revision 1.54 2001/11/07 00:03:14 steudten
758 * Give reliable return value if an error
759 * occurs not just 0 with new daemon mode.
761 * Revision 1.53 2001/11/05 21:41:43 steudten
762 * Add changes to be a real daemon just for unix os.
763 * (change cwd to /, detach from controlling tty, set
764 * process group and session leader to the own process.
766 * Add some fatal-error log message for failed malloc().
767 * Add '-d' if compiled with 'configure --with-debug' to
768 * enable debug output.
770 * Revision 1.52 2001/10/26 20:11:20 jongfoster
771 * Fixing type mismatch
773 * Revision 1.51 2001/10/26 17:38:28 oes
776 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
777 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
778 * threads to call select() simultaneously. So, it's time to do a real, live,
779 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
780 * (native). Both versions will work, but using __OS2__ offers multi-threading.
782 * Revision 1.49 2001/10/23 21:41:35 jongfoster
783 * Added call to initialize the (statically-allocated of course)
784 * "out of memory" CGI response.
786 * Revision 1.48 2001/10/10 19:56:46 jongfoster
787 * Moving some code that wasn't cookie-related out of an #ifdef
790 * Revision 1.47 2001/10/10 16:44:36 oes
791 * Added CONNECT destination port limitation check
793 * Revision 1.46 2001/10/08 15:17:41 oes
794 * Re-enabled SSL forwarding
796 * Revision 1.45 2001/10/07 15:42:11 oes
797 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
799 * Moved downgrading of the HTTP version from parse_http_request to
800 * chat(), since we can't decide if it is necessary before we have
801 * determined the actions for the URL. The HTTP command is now
802 * *always* re-built so the repairs need no longer be special-cased.
804 * filter_popups now gets a csp pointer so it can raise the new
805 * CSP_FLAG_MODIFIED flag.
809 * Added configurable size limit for the IOB. If the IOB grows so
810 * large that the next read would exceed the limit, the header
811 * is generated, and the header & unfiltered buffer are flushed
812 * to the client. Chat then continues in non-buffering,
813 * non-filtering body mode.
815 * Revision 1.44 2001/10/02 18:13:57 oes
818 * Revision 1.43 2001/10/02 15:32:13 oes
819 * Moved generation of hdr
821 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
822 * Cleaning up 2 compiler warnings on OS/2.
824 * Revision 1.41 2001/09/16 17:05:14 jongfoster
825 * Removing unused #include showarg.h
827 * Revision 1.40 2001/09/16 15:41:45 jongfoster
828 * Fixing signed/unsigned comparison warning.
830 * Revision 1.39 2001/09/16 13:21:27 jongfoster
831 * Changes to use new list functions.
833 * Revision 1.38 2001/09/16 13:01:46 jongfoster
834 * Removing redundant function call that zeroed zalloc()'d memory.
836 * Revision 1.37 2001/09/10 11:12:24 oes
837 * Deleted unused variable
839 * Revision 1.36 2001/09/10 10:56:15 oes
840 * Silenced compiler warnings
842 * Revision 1.35 2001/07/31 14:44:22 oes
843 * Deleted unused size parameter from filter_popups()
845 * Revision 1.34 2001/07/30 22:08:36 jongfoster
846 * Tidying up #defines:
847 * - All feature #defines are now of the form FEATURE_xxx
848 * - Permanently turned off WIN_GUI_EDIT
849 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
851 * Revision 1.33 2001/07/29 19:32:00 jongfoster
852 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
854 * Revision 1.32 2001/07/29 18:47:05 jongfoster
855 * Adding missing #include "loadcfg.h"
857 * Revision 1.31 2001/07/29 12:17:48 oes
858 * Applied pthread fix by Paul Lieverse
860 * Revision 1.30 2001/07/25 22:57:13 jongfoster
861 * __BEOS__ no longer overrides FEATURE_PTHREAD.
862 * This is because FEATURE_PTHREAD will soon be widely used, so I
863 * want to keep it simple.
865 * Revision 1.29 2001/07/24 12:47:06 oes
866 * Applied BeOS support update by Eugenia
868 * Revision 1.28 2001/07/23 13:26:12 oes
869 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
871 * Revision 1.27 2001/07/19 19:09:47 haroon
872 * - Added code to take care of the situation where while processing the first
873 * server response (which includes the server header), after finding the end
874 * of the headers we were not looking past the end of the headers for
875 * content modification. I enabled it for filter_popups.
876 * Someone else should look to see if other similar operations should be
877 * done to the discarded portion of the buffer.
879 * Note 2001/07/20: No, the other content modification mechanisms will process
880 * the whole iob later anyway. --oes
882 * Revision 1.26 2001/07/18 12:31:36 oes
885 * Revision 1.25 2001/07/15 19:43:49 jongfoster
886 * Supports POSIX threads.
887 * Also removed some unused #includes.
889 * Revision 1.24 2001/07/13 14:00:40 oes
890 * - Generic content modification scheme:
891 * Each feature has its own applicability flag that is set
892 * from csp->action->flags.
893 * Replaced the "filtering" int flag , by a function pointer
894 * "content_filter" to the function that will do the content
895 * modification. If it is != NULL, the document will be buffered
896 * and processed through *content_filter, which must set
897 * csp->content_length and return a modified copy of the body
898 * or return NULL (on failiure).
899 * - Changed csp->is_text to the more generic bitmap csp->content_type
900 * which can currently take the valued CT_TEXT or CT_GIF
902 * - Removed all #ifdef PCRS
904 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
905 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
906 * the `block_acl' call. This prevents a compilation error when the user
907 * does not wish to use the "ACL" feature.
909 * Revision 1.22 2001/06/29 21:45:41 oes
910 * Indentation, CRLF->LF, Tab-> Space
912 * Revision 1.21 2001/06/29 13:29:36 oes
913 * - Cleaned up, improved comments
914 * - Unified all possible interceptors (CGI,
915 * block, trust, fast_redirect) in one
916 * place, with one (CGI) answer generation
917 * mechansim. Much clearer now.
918 * - Removed the GIF image generation, which
919 * is now done in filters.c:block_url()
920 * - Made error conditions like domain lookup
921 * failiure or (various) problems while talking
922 * to the server use cgi.c:error_response()
923 * instead of generating HTML/HTTP in chat() (yuck!)
924 * - Removed logentry from cancelled commit
926 * Revision 1.20 2001/06/09 10:55:28 jongfoster
927 * Changing BUFSIZ ==> BUFFER_SIZE
929 * Revision 1.19 2001/06/07 23:12:52 jongfoster
930 * Replacing function pointer in struct gateway with a directly
931 * called function forwarded_connect().
932 * Replacing struct gateway with struct forward_spec
934 * Revision 1.18 2001/06/03 19:12:16 oes
935 * introduced new cgi handling
937 * Revision 1.17 2001/06/01 20:07:23 jongfoster
938 * Now uses action +image-blocker{} rather than config->tinygif
940 * Revision 1.16 2001/06/01 18:49:17 jongfoster
941 * Replaced "list_share" with "list" - the tiny memory gain was not
942 * worth the extra complexity.
944 * Revision 1.15 2001/05/31 21:24:47 jongfoster
945 * Changed "permission" to "action" throughout.
946 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
947 * Moved vanilla wafer check into chat(), since we must now
948 * decide whether or not to add it based on the URL.
950 * Revision 1.14 2001/05/29 20:14:01 joergs
951 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
954 * Revision 1.13 2001/05/29 09:50:24 jongfoster
955 * Unified blocklist/imagelist/permissionslist.
956 * File format is still under discussion, but the internal changes
959 * Also modified interceptor behaviour:
960 * - We now intercept all URLs beginning with one of the following
961 * prefixes (and *only* these prefixes):
963 * * http://ijbswa.sf.net/config/
964 * * http://ijbswa.sourceforge.net/config/
965 * - New interceptors "home page" - go to http://i.j.b/ to see it.
966 * - Internal changes so that intercepted and fast redirect pages
967 * are not replaced with an image.
968 * - Interceptors now have the option to send a binary page direct
969 * to the client. (i.e. ijb-send-banner uses this)
970 * - Implemented show-url-info interceptor. (Which is why I needed
971 * the above interceptors changes - a typical URL is
972 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
973 * The previous mechanism would not have intercepted that, and
974 * if it had been intercepted then it then it would have replaced
977 * Revision 1.12 2001/05/27 22:17:04 oes
979 * - re_process_buffer no longer writes the modified buffer
980 * to the client, which was very ugly. It now returns the
981 * buffer, which it is then written by chat.
983 * - content_length now adjusts the Content-Length: header
984 * for modified documents rather than crunch()ing it.
985 * (Length info in csp->content_length, which is 0 for
986 * unmodified documents)
988 * - For this to work, sed() is called twice when filtering.
990 * Revision 1.11 2001/05/26 17:27:53 jongfoster
991 * Added support for CLF and fixed LOG_LEVEL_LOG.
992 * Also did CRLF->LF fix of my previous patch.
994 * Revision 1.10 2001/05/26 15:26:15 jongfoster
995 * ACL feature now provides more security by immediately dropping
996 * connections from untrusted hosts.
998 * Revision 1.9 2001/05/26 00:28:36 jongfoster
999 * Automatic reloading of config file.
1000 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
1001 * Most of the global variables have been moved to a new
1002 * struct configuration_spec, accessed through csp->config->globalname
1003 * Most of the globals remaining are used by the Win32 GUI.
1005 * Revision 1.8 2001/05/25 22:43:18 jongfoster
1006 * Fixing minor memory leak and buffer overflow.
1008 * Revision 1.7 2001/05/25 22:34:30 jongfoster
1011 * Revision 1.6 2001/05/23 00:13:58 joergs
1012 * AmigaOS support fixed.
1014 * Revision 1.5 2001/05/22 18:46:04 oes
1016 * - Enabled filtering banners by size rather than URL
1017 * by adding patterns that replace all standard banner
1018 * sizes with the "Junkbuster" gif to the re_filterfile
1020 * - Enabled filtering WebBugs by providing a pattern
1021 * which kills all 1x1 images
1023 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
1024 * which is selected by the (nonstandard and therefore
1025 * capital) letter 'U' in the option string.
1026 * It causes the quantifiers to be ungreedy by default.
1027 * Appending a ? turns back to greedy (!).
1029 * - Added a new interceptor ijb-send-banner, which
1030 * sends back the "Junkbuster" gif. Without imagelist or
1031 * MSIE detection support, or if tinygif = 1, or the
1032 * URL isn't recognized as an imageurl, a lame HTML
1033 * explanation is sent instead.
1035 * - Added new feature, which permits blocking remote
1036 * script redirects and firing back a local redirect
1038 * The feature is conditionally compiled, i.e. it
1039 * can be disabled with --disable-fast-redirects,
1040 * plus it must be activated by a "fast-redirects"
1041 * line in the config file, has its own log level
1042 * and of course wants to be displayed by show-proxy-args
1043 * Note: Boy, all the #ifdefs in 1001 locations and
1044 * all the fumbling with configure.in and acconfig.h
1045 * were *way* more work than the feature itself :-(
1047 * - Because a generic redirect template was needed for
1048 * this, tinygif = 3 now uses the same.
1050 * - Moved GIFs, and other static HTTP response templates
1053 * - Some minor fixes
1055 * - Removed some >400 CRs again (Jon, you really worked
1058 * Revision 1.4 2001/05/21 19:34:01 jongfoster
1059 * Made failure to bind() a fatal error.
1061 * Revision 1.3 2001/05/20 01:21:20 jongfoster
1062 * Version 2.9.4 checkin.
1063 * - Merged popupfile and cookiefile, and added control over PCRS
1064 * filtering, in new "permissionsfile".
1065 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
1066 * file error you now get a message box (in the Win32 GUI) rather
1067 * than the program exiting with no explanation.
1068 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
1070 * - Removed tabs from "config"
1071 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
1072 * - Bumped up version number.
1074 * Revision 1.2 2001/05/17 22:34:44 oes
1075 * - Added hint on GIF char array generation to jcc.c
1076 * - Cleaned CRLF's from the sources and related files
1077 * - Repaired logging for REF and FRC
1079 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
1080 * Initial import of version 2.9.3 source tree
1083 *********************************************************************/
1089 #include <sys/types.h>
1098 # ifndef FEATURE_PTHREAD
1102 # include <windows.h>
1103 # include <process.h>
1104 # endif /* ndef FEATURE_PTHREAD */
1107 # ifndef _WIN_CONSOLE
1108 # include "w32log.h"
1109 # endif /* ndef _WIN_CONSOLE */
1110 # include "w32svrapi.h"
1112 #else /* ifndef _WIN32 */
1114 # if !defined (__OS2__)
1115 # include <unistd.h>
1116 # include <sys/wait.h>
1117 # endif /* ndef __OS2__ */
1118 # include <sys/time.h>
1119 # include <sys/stat.h>
1120 # include <sys/ioctl.h>
1123 #include <sys/termios.h>
1131 # include <signal.h>
1134 # include <socket.h> /* BeOS has select() for sockets only. */
1135 # include <OS.h> /* declarations for threads and stuff. */
1138 # if defined(__EMX__) || defined(__OS2__)
1139 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
1144 #define bzero(B,N) memset(B,0x00,n)
1148 # include <select.h>
1153 #include "project.h"
1156 #include "filters.h"
1157 #include "loaders.h"
1158 #include "parsers.h"
1159 #include "miscutil.h"
1161 #include "jbsockets.h"
1162 #include "gateway.h"
1163 #include "actions.h"
1165 #include "loadcfg.h"
1166 #include "urlmatch.h"
1168 const char jcc_h_rcs[] = JCC_H_VERSION;
1169 const char project_h_rcs[] = PROJECT_H_VERSION;
1172 struct client_state clients[1];
1173 struct file_list files[1];
1175 #ifdef FEATURE_STATISTICS
1176 int urls_read = 0; /* total nr of urls read inc rejected */
1177 int urls_rejected = 0; /* total nr of urls rejected */
1178 #endif /* def FEATURE_STATISTICS */
1180 #ifdef FEATURE_GRACEFUL_TERMINATION
1181 int g_terminate = 0;
1184 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1185 static void sig_handler(int the_signal);
1187 static int client_protocol_is_unsupported(const struct client_state *csp, char *req);
1188 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
1189 static jb_err get_server_headers(struct client_state *csp);
1190 static const char *crunch_reason(const struct http_response *rsp);
1191 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp);
1193 * static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len);
1195 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
1196 static jb_err change_request_destination(struct client_state *csp);
1197 static void chat(struct client_state *csp);
1198 static void serve(struct client_state *csp);
1199 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1200 static void usage(const char *myname);
1202 static void initialize_mutexes(void);
1203 static jb_socket bind_port_helper(struct configuration_spec *config);
1204 static void listen_loop(void);
1207 void serve(struct client_state *csp);
1208 #else /* ifndef AMIGA */
1209 static void serve(struct client_state *csp);
1210 #endif /* def AMIGA */
1213 static int32 server_thread(void *data);
1214 #endif /* def __BEOS__ */
1217 #define sleep(N) Sleep(((N) * 1000))
1221 #define sleep(N) DosSleep(((N) * 100))
1224 #ifdef MUTEX_LOCKS_AVAILABLE
1226 * XXX: Does the locking stuff really belong in this file?
1228 privoxy_mutex_t log_mutex;
1229 privoxy_mutex_t log_init_mutex;
1230 privoxy_mutex_t connection_reuse_mutex;
1232 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
1233 privoxy_mutex_t resolver_mutex;
1234 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
1236 #ifndef HAVE_GMTIME_R
1237 privoxy_mutex_t gmtime_mutex;
1238 #endif /* ndef HAVE_GMTIME_R */
1240 #ifndef HAVE_LOCALTIME_R
1241 privoxy_mutex_t localtime_mutex;
1242 #endif /* ndef HAVE_GMTIME_R */
1245 privoxy_mutex_t rand_mutex;
1246 #endif /* ndef HAVE_RANDOM */
1248 #endif /* def MUTEX_LOCKS_AVAILABLE */
1251 const char *basedir = NULL;
1252 const char *pidfile = NULL;
1253 static int received_hup_signal = 0;
1254 #endif /* defined unix */
1256 /* HTTP snipplets. */
1257 static const char CSUCCEED[] =
1258 "HTTP/1.0 200 Connection established\r\n"
1259 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
1261 static const char CHEADER[] =
1262 "HTTP/1.0 400 Invalid header received from client\r\n"
1263 "Proxy-Agent: Privoxy " VERSION "\r\n"
1264 "Content-Type: text/plain\r\n"
1265 "Connection: close\r\n\r\n"
1266 "Invalid header received from client.\r\n";
1268 static const char FTP_RESPONSE[] =
1269 "HTTP/1.0 400 Invalid request received from client\r\n"
1270 "Content-Type: text/plain\r\n"
1271 "Connection: close\r\n\r\n"
1272 "Invalid request. Privoxy doesn't support FTP.\r\n";
1274 static const char GOPHER_RESPONSE[] =
1275 "HTTP/1.0 400 Invalid request received from client\r\n"
1276 "Content-Type: text/plain\r\n"
1277 "Connection: close\r\n\r\n"
1278 "Invalid request. Privoxy doesn't support gopher.\r\n";
1280 /* XXX: should be a template */
1281 static const char MISSING_DESTINATION_RESPONSE[] =
1282 "HTTP/1.0 400 Bad request received from client\r\n"
1283 "Proxy-Agent: Privoxy " VERSION "\r\n"
1284 "Content-Type: text/plain\r\n"
1285 "Connection: close\r\n\r\n"
1286 "Bad request. Privoxy was unable to extract the destination.\r\n";
1288 /* XXX: should be a template */
1289 static const char NO_SERVER_DATA_RESPONSE[] =
1290 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1291 "Proxy-Agent: Privoxy " VERSION "\r\n"
1292 "Content-Type: text/plain\r\n"
1293 "Connection: close\r\n\r\n"
1294 "Empty server or forwarder response.\r\n"
1295 "The connection has been closed but Privoxy didn't receive any data.\r\n";
1297 /* XXX: should be a template */
1298 static const char INVALID_SERVER_HEADERS_RESPONSE[] =
1299 "HTTP/1.0 502 Server or forwarder response invalid\r\n"
1300 "Proxy-Agent: Privoxy " VERSION "\r\n"
1301 "Content-Type: text/plain\r\n"
1302 "Connection: close\r\n\r\n"
1303 "Bad response. The server or forwarder response doesn't look like HTTP.\r\n";
1306 /* XXX: should be a template */
1307 static const char NULL_BYTE_RESPONSE[] =
1308 "HTTP/1.0 400 Bad request received from client\r\n"
1309 "Proxy-Agent: Privoxy " VERSION "\r\n"
1310 "Content-Type: text/plain\r\n"
1311 "Connection: close\r\n\r\n"
1312 "Bad request. Null byte(s) before end of request.\r\n";
1315 /* XXX: should be a template */
1316 static const char MESSED_UP_REQUEST_RESPONSE[] =
1317 "HTTP/1.0 400 Malformed request after rewriting\r\n"
1318 "Proxy-Agent: Privoxy " VERSION "\r\n"
1319 "Content-Type: text/plain\r\n"
1320 "Connection: close\r\n\r\n"
1321 "Bad request. Messed up with header filters.\r\n";
1323 /* A function to crunch a response */
1324 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
1326 /* Crunch function flags */
1327 #define CF_NO_FLAGS 0
1328 /* Cruncher applies to forced requests as well */
1329 #define CF_IGNORE_FORCE 1
1330 /* Crunched requests are counted for the block statistics */
1331 #define CF_COUNT_AS_REJECT 2
1333 /* A crunch function and its flags */
1336 const crunch_func_ptr cruncher;
1340 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
1342 /* Complete list of cruncher functions */
1343 static const struct cruncher crunchers_all[] = {
1344 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
1345 { block_url, CF_COUNT_AS_REJECT },
1346 #ifdef FEATURE_TRUST
1347 { trust_url, CF_COUNT_AS_REJECT },
1348 #endif /* def FEATURE_TRUST */
1349 { redirect_url, CF_NO_FLAGS },
1350 { dispatch_cgi, CF_IGNORE_FORCE},
1354 /* Light version, used after tags are applied */
1355 static const struct cruncher crunchers_light[] = {
1356 { block_url, CF_COUNT_AS_REJECT },
1357 { redirect_url, CF_NO_FLAGS },
1363 * XXX: Don't we really mean
1369 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1370 /*********************************************************************
1372 * Function : sig_handler
1374 * Description : Signal handler for different signals.
1375 * Exit gracefully on TERM and INT
1376 * or set a flag that will cause the errlog
1377 * to be reopened by the main thread on HUP.
1380 * 1 : the_signal = the signal cause this function to call
1384 *********************************************************************/
1385 static void sig_handler(int the_signal)
1391 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1403 received_hup_signal = 1;
1409 * We shouldn't be here, unless we catch signals
1410 * in main() that we can't handle here!
1412 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1420 /*********************************************************************
1422 * Function : client_protocol_is_unsupported
1424 * Description : Checks if the client used a known unsupported
1425 * protocol and deals with it by sending an error
1429 * 1 : csp = Current client state (buffers, headers, etc...)
1430 * 2 : req = the first request line send by the client
1432 * Returns : TRUE if an error response has been generated, or
1433 * FALSE if the request doesn't look invalid.
1435 *********************************************************************/
1436 static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1439 * If it's a FTP or gopher request, we don't support it.
1441 * These checks are better than nothing, but they might
1442 * not work in all configurations and some clients might
1443 * have problems digesting the answer.
1445 * They should, however, never cause more problems than
1446 * Privoxy's old behaviour (returning the misleading HTML
1449 * "Could not resolve http://(ftp|gopher)://example.org").
1451 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1453 const char *response = NULL;
1454 const char *protocol = NULL;
1456 if (!strncmpic(req, "GET ftp://", 10))
1458 response = FTP_RESPONSE;
1463 response = GOPHER_RESPONSE;
1464 protocol = "GOPHER";
1466 log_error(LOG_LEVEL_ERROR,
1467 "%s tried to use Privoxy as %s proxy: %s",
1468 csp->ip_addr_str, protocol, req);
1469 log_error(LOG_LEVEL_CLF,
1470 "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1472 write_socket(csp->cfd, response, strlen(response));
1481 /*********************************************************************
1483 * Function : get_request_destination_elsewhere
1485 * Description : If the client's request was redirected into
1486 * Privoxy without the client's knowledge,
1487 * the request line lacks the destination host.
1489 * This function tries to get it elsewhere,
1490 * provided accept-intercepted-requests is enabled.
1492 * "Elsewhere" currently only means "Host: header",
1493 * but in the future we may ask the redirecting
1494 * packet filter to look the destination up.
1496 * If the destination stays unknown, an error
1497 * response is send to the client and headers
1498 * are freed so that chat() can return directly.
1501 * 1 : csp = Current client state (buffers, headers, etc...)
1502 * 2 : headers = a header list
1504 * Returns : JB_ERR_OK if the destination is now known, or
1505 * JB_ERR_PARSE if it isn't.
1507 *********************************************************************/
1508 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1512 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1514 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1515 " Privoxy isn't configured to accept intercepted requests.",
1516 csp->ip_addr_str, csp->http->cmd);
1517 /* XXX: Use correct size */
1518 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1519 csp->ip_addr_str, csp->http->cmd);
1521 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1522 destroy_list(headers);
1524 return JB_ERR_PARSE;
1526 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1528 /* Split the domain we just got for pattern matching */
1529 init_domain_components(csp->http);
1535 /* We can't work without destination. Go spread the news.*/
1537 req = list_to_text(headers);
1539 /* XXX: Use correct size */
1540 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1541 csp->ip_addr_str, csp->http->cmd);
1542 log_error(LOG_LEVEL_ERROR,
1543 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1544 csp->ip_addr_str, csp->http->cmd, req);
1547 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
1548 destroy_list(headers);
1550 return JB_ERR_PARSE;
1553 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1554 * to get the destination IP address, use it as host directly
1555 * or do a reverse DNS lookup first.
1560 /*********************************************************************
1562 * Function : get_server_headers
1564 * Description : Parses server headers in iob and fills them
1565 * into csp->headers so that they can later be
1569 * 1 : csp = Current client state (buffers, headers, etc...)
1571 * Returns : JB_ERR_OK if everything went fine, or
1572 * JB_ERR_PARSE if the headers were incomplete.
1574 *********************************************************************/
1575 static jb_err get_server_headers(struct client_state *csp)
1577 int continue_hack_in_da_house = 0;
1580 while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
1585 * continue hack in da house. Ignore the ending of
1586 * this head and continue enlisting header lines.
1587 * The reason is described below.
1589 enlist(csp->headers, "");
1590 continue_hack_in_da_house = 0;
1593 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1596 * It's a bodyless continue response, don't
1597 * stop header parsing after reaching its end.
1599 * As a result Privoxy will concatenate the
1600 * next response's head and parse and deliver
1601 * the headers as if they belonged to one request.
1603 * The client will separate them because of the
1604 * empty line between them.
1606 * XXX: What we're doing here is clearly against
1607 * the intended purpose of the continue header,
1608 * and under some conditions (HTTP/1.0 client request)
1609 * it's a standard violation.
1611 * Anyway, "sort of against the spec" is preferable
1612 * to "always getting confused by Continue responses"
1613 * (Privoxy's behaviour before this hack was added)
1615 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1616 continue_hack_in_da_house = 1;
1618 else if (*header == '\0')
1621 * If the header is empty, but the Continue hack
1622 * isn't active, we can assume that we reached the
1623 * end of the buffer before we hit the end of the
1626 * Inform the caller an let it decide how to handle it.
1628 return JB_ERR_PARSE;
1631 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1634 * XXX: Should we quit the request and return a
1635 * out of memory error page instead?
1637 log_error(LOG_LEVEL_ERROR,
1638 "Out of memory while enlisting server headers. %s lost.",
1648 /*********************************************************************
1650 * Function : crunch_reason
1652 * Description : Translates the crunch reason code into a string.
1655 * 1 : rsp = a http_response
1657 * Returns : A string with the crunch reason or an error description.
1659 *********************************************************************/
1660 static const char *crunch_reason(const struct http_response *rsp)
1662 char * reason = NULL;
1664 assert(rsp != NULL);
1667 return "Internal error while searching for crunch reason";
1670 switch (rsp->reason)
1672 case RSP_REASON_UNSUPPORTED:
1673 reason = "Unsupported HTTP feature";
1675 case RSP_REASON_BLOCKED:
1678 case RSP_REASON_UNTRUSTED:
1679 reason = "Untrusted";
1681 case RSP_REASON_REDIRECTED:
1682 reason = "Redirected";
1684 case RSP_REASON_CGI_CALL:
1685 reason = "CGI Call";
1687 case RSP_REASON_NO_SUCH_DOMAIN:
1688 reason = "DNS failure";
1690 case RSP_REASON_FORWARDING_FAILED:
1691 reason = "Forwarding failed";
1693 case RSP_REASON_CONNECT_FAILED:
1694 reason = "Connection failure";
1696 case RSP_REASON_OUT_OF_MEMORY:
1697 reason = "Out of memory (may mask other reasons)";
1700 reason = "No reason recorded";
1708 /*********************************************************************
1710 * Function : send_crunch_response
1712 * Description : Delivers already prepared response for
1713 * intercepted requests, logs the interception
1714 * and frees the response.
1717 * 1 : csp = Current client state (buffers, headers, etc...)
1718 * 1 : rsp = Fully prepared response. Will be freed on exit.
1720 * Returns : Nothing.
1722 *********************************************************************/
1723 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp)
1725 const struct http_request *http = csp->http;
1726 char status_code[4];
1728 assert(rsp != NULL);
1729 assert(rsp->head != NULL);
1734 * Not supposed to happen. If it does
1735 * anyway, treat it as an unknown error.
1737 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1738 /* return code doesn't matter */
1743 /* If rsp is still NULL, we have serious internal problems. */
1744 log_error(LOG_LEVEL_FATAL,
1745 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1749 * Extract the status code from the actual head
1750 * that was send to the client. It is the only
1751 * way to get it right for all requests, including
1752 * the fixed ones for out-of-memory problems.
1754 * A head starts like this: 'HTTP/1.1 200...'
1758 status_code[0] = rsp->head[9];
1759 status_code[1] = rsp->head[10];
1760 status_code[2] = rsp->head[11];
1761 status_code[3] = '\0';
1763 /* Write the answer to the client */
1764 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1765 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1767 /* There is nothing we can do about it. */
1768 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1771 /* Log that the request was crunched and why. */
1772 log_error(LOG_LEVEL_GPC, "%s%s crunch! (%s)",
1773 http->hostport, http->path, crunch_reason(rsp));
1774 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %d",
1775 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1777 /* Clean up and return */
1778 if (cgi_error_memory() != rsp)
1780 free_http_response(rsp);
1787 /*********************************************************************
1789 * Function : request_contains_null_bytes
1791 * Description : Checks for NULL bytes in the request and sends
1792 * an error message to the client if any were found.
1794 * XXX: currently not used, see comment in chat().
1797 * 1 : csp = Current client state (buffers, headers, etc...)
1798 * 2 : buf = Data from the client's request to check.
1799 * 3 : len = The data length.
1801 * Returns : TRUE if the request contained one or more NULL bytes, or
1804 *********************************************************************/
1805 static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1807 size_t c_len; /* Request lenght when treated as C string */
1809 c_len = strlen(buf);
1814 * Null byte(s) found. Log the request,
1815 * return an error response and hang up.
1817 size_t tmp_len = c_len;
1822 * Replace NULL byte(s) with '°' characters
1823 * so the request can be logged as string.
1824 * XXX: Is there a better replacement character?
1827 tmp_len += strlen(buf+tmp_len);
1828 } while (tmp_len < len);
1830 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1831 "(length=%d, strlen=%d).", csp->ip_addr_str, len, c_len);
1832 log_error(LOG_LEVEL_HEADER,
1833 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1835 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
1837 /* XXX: Log correct size */
1838 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1848 /*********************************************************************
1850 * Function : crunch_response_triggered
1852 * Description : Checks if the request has to be crunched,
1853 * and delivers the crunch response if necessary.
1856 * 1 : csp = Current client state (buffers, headers, etc...)
1857 * 2 : crunchers = list of cruncher functions to run
1859 * Returns : TRUE if the request was answered with a crunch response
1862 *********************************************************************/
1863 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
1865 struct http_response *rsp = NULL;
1866 const struct cruncher *c;
1869 * If CGI request crunching is disabled,
1870 * check the CGI dispatcher out of order to
1871 * prevent unintentional blocks or redirects.
1873 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
1874 && (NULL != (rsp = dispatch_cgi(csp))))
1876 /* Deliver, log and free the interception response. */
1877 send_crunch_response(csp, rsp);
1881 for (c = crunchers; c->cruncher != NULL; c++)
1884 * Check the cruncher if either Privoxy is toggled
1885 * on and the request isn't forced, or if the cruncher
1886 * applies to forced requests as well.
1888 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
1889 !(csp->flags & CSP_FLAG_FORCED)) ||
1890 (c->flags & CF_IGNORE_FORCE))
1892 rsp = c->cruncher(csp);
1895 /* Deliver, log and free the interception response. */
1896 send_crunch_response(csp, rsp);
1897 #ifdef FEATURE_STATISTICS
1898 if (c->flags & CF_COUNT_AS_REJECT)
1900 csp->flags |= CSP_FLAG_REJECTED;
1902 #endif /* def FEATURE_STATISTICS */
1913 /*********************************************************************
1915 * Function : build_request_line
1917 * Description : Builds the HTTP request line.
1919 * If a HTTP forwarder is used it expects the whole URL,
1920 * web servers only get the path.
1923 * 1 : csp = Current client state (buffers, headers, etc...)
1924 * 2 : fwd = The forwarding spec used for the request
1925 * XXX: Should use http->fwd instead.
1926 * 3 : request_line = The old request line which will be replaced.
1928 * Returns : Nothing. Terminates in case of memory problems.
1930 *********************************************************************/
1931 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
1933 struct http_request *http = csp->http;
1935 assert(http->ssl == 0);
1938 * Downgrade http version from 1.1 to 1.0
1939 * if +downgrade action applies.
1941 if ( (csp->action->flags & ACTION_DOWNGRADE)
1942 && (!strcmpic(http->ver, "HTTP/1.1")))
1945 http->ver = strdup("HTTP/1.0");
1947 if (http->ver == NULL)
1949 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1954 * Rebuild the request line.
1956 freez(*request_line);
1957 *request_line = strdup(http->gpc);
1958 string_append(request_line, " ");
1960 if (fwd->forward_host)
1962 string_append(request_line, http->url);
1966 string_append(request_line, http->path);
1968 string_append(request_line, " ");
1969 string_append(request_line, http->ver);
1971 if (*request_line == NULL)
1973 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1975 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
1979 /*********************************************************************
1981 * Function : change_request_destination
1983 * Description : Parse a (rewritten) request line and regenerate
1984 * the http request data.
1987 * 1 : csp = Current client state (buffers, headers, etc...)
1989 * Returns : Forwards the parse_http_request() return code.
1990 * Terminates in case of memory problems.
1992 *********************************************************************/
1993 static jb_err change_request_destination(struct client_state *csp)
1995 struct http_request *http = csp->http;
1998 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
1999 free_http_request(http);
2000 err = parse_http_request(csp->headers->first->str, http, csp);
2001 if (JB_ERR_OK != err)
2003 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
2004 jb_err_to_string(err));
2008 /* XXX: ocmd is a misleading name */
2009 http->ocmd = strdup(http->cmd);
2010 if (http->ocmd == NULL)
2012 log_error(LOG_LEVEL_FATAL,
2013 "Out of memory copying rewritten HTTP request line");
2021 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2022 /*********************************************************************
2024 * Function : server_response_is_complete
2026 * Description : Determines whether we should stop reading
2027 * from the server socket.
2030 * 1 : csp = Current client state (buffers, headers, etc...)
2031 * 2 : content_length = Length of content received so far.
2033 * Returns : TRUE if the response is complete,
2036 *********************************************************************/
2037 static int server_response_is_complete(struct client_state *csp, size_t content_length)
2039 int content_length_known = (csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
2041 if (!strcmpic(csp->http->gpc, "HEAD"))
2044 * "HEAD" implies no body, we are thus expecting
2045 * no content. XXX: incomplete "list" of methods?
2047 csp->expected_content_length = 0;
2048 content_length_known = TRUE;
2051 if (csp->http->status == 304)
2054 * Expect no body. XXX: incomplete "list" of status codes?
2056 csp->expected_content_length = 0;
2057 content_length_known = TRUE;
2060 return (content_length_known && ((0 == csp->expected_content_length)
2061 || (csp->expected_content_length <= content_length)));
2063 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2066 /*********************************************************************
2070 * Description : Once a connection to the client has been accepted,
2071 * this function is called (via serve()) to handle the
2072 * main business of the communication. When this
2073 * function returns, the caller must close the client
2076 * FIXME: chat is nearly thousand lines long.
2080 * 1 : csp = Current client state (buffers, headers, etc...)
2082 * Returns : Nothing.
2084 *********************************************************************/
2085 static void chat(struct client_state *csp)
2087 char buf[BUFFER_SIZE];
2095 int ms_iis5_hack = 0;
2096 size_t byte_count = 0;
2097 int forwarded_connect_retries = 0;
2098 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
2099 const struct forward_spec * fwd;
2100 struct http_request *http;
2101 int len; /* for buffer sizes (and negative error codes) */
2104 /* Function that does the content filtering for the current request */
2105 filter_function_ptr content_filter = NULL;
2107 /* Skeleton for HTTP response, if we should intercept the request */
2108 struct http_response *rsp;
2110 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
2111 struct list header_list;
2112 struct list *headers = &header_list;
2116 memset(buf, 0, sizeof(buf));
2119 * Read the client's request. Note that since we're not using select() we
2120 * could get blocked here if a client connected, then didn't say anything!
2125 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2127 if (len <= 0) break; /* error! */
2130 * If there is no memory left for buffering the
2131 * request, there is nothing we can do but hang up
2133 if (add_to_iob(csp, buf, len))
2138 req = get_header(csp->iob);
2140 } while ((NULL != req) && ('\0' == *req));
2142 if ((NULL != req) && ('\0' != *req))
2144 /* Request received. Validate and parse it. */
2148 * XXX: Temporary disabled to prevent problems
2149 * with POST requests whose bodies are allowed to
2150 * contain NULL bytes. BR#1730105.
2152 * The main purpose of this check is to properly
2153 * log stuff like BitTorrent traffic and other junk
2154 * that hits public proxies. It's not required for
2155 * Privoxy to functions as those requests are discarded
2158 * It probably should be rewritten to only check
2159 * the head of the request. Another option would
2160 * be to let all POST requests pass, although that
2161 * may not be good enough.
2163 if (request_contains_null_bytes(csp, buf, len))
2165 /* NULL bytes found and dealt with, just hang up. */
2170 /* Does the request line look invalid? */
2171 if (client_protocol_is_unsupported(csp, req))
2174 * Yes. The request has already been
2175 * answered with a error response, the buffers
2176 * were freed and we're done with chatting.
2181 #ifdef FEATURE_FORCE_LOAD
2183 * If this request contains the FORCE_PREFIX and blocks
2184 * aren't enforced, get rid of it and set the force flag.
2186 if (strstr(req, FORCE_PREFIX))
2188 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
2190 log_error(LOG_LEVEL_FORCE,
2191 "Ignored force prefix in request: \"%s\".", req);
2195 strclean(req, FORCE_PREFIX);
2196 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
2197 csp->flags |= CSP_FLAG_FORCED;
2201 #endif /* def FEATURE_FORCE_LOAD */
2202 err = parse_http_request(req, http, csp);
2203 if (JB_ERR_OK != err)
2205 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", jb_err_to_string(err));
2211 if (http->cmd == NULL)
2213 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
2214 /* XXX: Use correct size */
2215 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2216 log_error(LOG_LEVEL_ERROR, "Invalid header received from %s.", csp->ip_addr_str);
2218 free_http_request(http);
2222 /* grab the rest of the client's headers */
2226 p = get_header(csp->iob);
2230 /* There are no additional headers to read. */
2237 * We didn't receive a complete header
2238 * line yet, get the rest of it.
2240 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2243 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
2244 destroy_list(headers);
2248 if (add_to_iob(csp, buf, len))
2251 * If there is no memory left for buffering the
2252 * request, there is nothing we can do but hang up
2254 destroy_list(headers);
2261 * We were able to read a complete
2262 * header and can finaly enlist it.
2269 if (http->host == NULL)
2272 * If we still don't know the request destination,
2273 * the request is invalid or the client uses
2274 * Privoxy without its knowledge.
2276 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
2279 * Our attempts to get the request destination
2280 * elsewhere failed or Privoxy is configured
2281 * to only accept proxy requests.
2283 * An error response has already been send
2284 * and we're done here.
2291 * Determine the actions for this URL
2293 #ifdef FEATURE_TOGGLE
2294 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
2296 /* Most compatible set of actions (i.e. none) */
2297 init_current_action(csp->action);
2300 #endif /* ndef FEATURE_TOGGLE */
2302 get_url_actions(csp, http);
2306 * Save a copy of the original request for logging
2308 http->ocmd = strdup(http->cmd);
2310 if (http->ocmd == NULL)
2312 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
2315 enlist(csp->headers, http->cmd);
2317 /* Append the previously read headers */
2318 list_append_list_unique(csp->headers, headers);
2319 destroy_list(headers);
2321 err = sed(csp, FILTER_CLIENT_HEADERS);
2322 if (JB_ERR_OK != err)
2324 assert(err == JB_ERR_PARSE);
2325 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers");
2327 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2329 /* Check request line for rewrites. */
2330 if ((NULL == csp->headers->first->str)
2331 || (strcmp(http->cmd, csp->headers->first->str) &&
2332 (JB_ERR_OK != change_request_destination(csp))))
2335 * A header filter broke the request line - bail out.
2337 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
2338 /* XXX: Use correct size */
2339 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
2340 log_error(LOG_LEVEL_ERROR, "Invalid request line after applying header filters.");
2342 free_http_request(http);
2346 /* decide how to route the HTTP request */
2347 fwd = forward_url(csp, http);
2350 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
2351 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2355 * build the http request to send to the server
2356 * we have to do one of the following:
2358 * create = use the original HTTP request to create a new
2359 * HTTP request that has either the path component
2360 * without the http://domainspec (w/path) or the
2361 * full orininal URL (w/url)
2362 * Note that the path and/or the HTTP version may
2363 * have been altered by now.
2365 * connect = Open a socket to the host:port of the server
2366 * and short-circuit server and client socket.
2368 * pass = Pass the request unchanged if forwarding a CONNECT
2369 * request to a parent proxy. Note that we'll be sending
2370 * the CFAIL message ourselves if connecting to the parent
2371 * fails, but we won't send a CSUCCEED message if it works,
2372 * since that would result in a double message (ours and the
2373 * parent's). After sending the request to the parent, we simply
2376 * here's the matrix:
2379 * +--------+--------+
2381 * 0 | create | connect|
2383 * Forwarding +--------+--------+
2385 * 1 | create | pass |
2387 * +--------+--------+
2391 if (http->ssl && connect_port_is_forbidden(csp))
2393 const char *acceptable_connect_ports =
2394 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
2395 assert(NULL != acceptable_connect_ports);
2396 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
2397 "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
2398 csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
2399 csp->action->flags |= ACTION_BLOCK;
2405 freez(csp->headers->first->str);
2406 build_request_line(csp, fwd, &csp->headers->first->str);
2409 hdr = list_to_text(csp->headers);
2412 /* FIXME Should handle error properly */
2413 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2417 * We have a request. Check if one of the crunchers wants it.
2419 if (crunch_response_triggered(csp, crunchers_all))
2422 * Yes. The client got the crunch response
2423 * and we are done here after cleaning up.
2426 list_remove_all(csp->headers);
2432 * The headers can't be removed earlier because
2433 * they were still needed for the referrer check
2434 * in case of CGI crunches.
2436 * XXX: Would it be worth to move the referrer check
2437 * into client_referrer() and set a flag if it's trusted?
2439 list_remove_all(csp->headers);
2441 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2443 if (fwd->forward_host)
2445 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2446 fwd->forward_host, fwd->forward_port, http->hostport);
2450 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2453 /* here we connect to the server, gateway, or the forwarder */
2455 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
2456 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2458 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
2459 forwarded_connect_retries, http->hostport);
2462 if (csp->sfd == JB_INVALID_SOCKET)
2464 if (fwd->type != SOCKS_NONE)
2467 rsp = error_response(csp, "forwarding-failed", errno);
2469 else if (errno == EINVAL)
2471 rsp = error_response(csp, "no-such-domain", errno);
2475 rsp = error_response(csp, "connect-failed", errno);
2476 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2480 /* Write the answer to the client */
2483 send_crunch_response(csp, rsp);
2490 if (fwd->forward_host || (http->ssl == 0))
2493 * Write the client's (modified) header to the server
2494 * (along with anything else that may be in the buffer)
2496 if (write_socket(csp->sfd, hdr, strlen(hdr))
2497 || (flush_socket(csp->sfd, csp->iob) < 0))
2499 log_error(LOG_LEVEL_CONNECT,
2500 "write header to: %s failed: %E", http->hostport);
2502 rsp = error_response(csp, "connect-failed", errno);
2505 send_crunch_response(csp, rsp);
2515 * We're running an SSL tunnel and we're not forwarding,
2516 * so just send the "connect succeeded" message to the
2517 * client, flush the rest, and get out of the way.
2519 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
2527 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2529 /* we're finished with the client's header */
2532 maxfd = (csp->cfd > csp->sfd) ? csp->cfd : csp->sfd;
2534 /* pass data between the client and server
2535 * until one or the other shuts down the connection.
2544 * FD_ZERO here seems to point to an errant macro which crashes.
2545 * So do this by hand for now...
2547 memset(&rfds,0x00,sizeof(fd_set));
2551 FD_SET(csp->cfd, &rfds);
2552 FD_SET(csp->sfd, &rfds);
2554 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2555 if (server_body && server_response_is_complete(csp, byte_count))
2557 log_error(LOG_LEVEL_CONNECT,
2558 "Done reading from server. Expected content length: %d. "
2559 "Actual content length: %d. Most recently received: %d.",
2560 csp->expected_content_length, byte_count, len);
2563 * XXX: should not jump around,
2564 * chat() is complicated enough already.
2568 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2570 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
2574 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2579 * This is the body of the browser's request,
2580 * just read and write it.
2582 if (FD_ISSET(csp->cfd, &rfds))
2584 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2588 break; /* "game over, man" */
2591 if (write_socket(csp->sfd, buf, (size_t)len))
2593 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2600 * The server wants to talk. It could be the header or the body.
2601 * If `hdr' is null, then it's the header otherwise it's the body.
2602 * FIXME: Does `hdr' really mean `host'? No.
2604 if (FD_ISSET(csp->sfd, &rfds))
2607 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2611 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2613 if (http->ssl && (fwd->forward_host == NULL))
2616 * Just hang up. We already confirmed the client's CONNECT
2617 * request with status code 200 and unencrypted content is
2618 * no longer welcome.
2620 log_error(LOG_LEVEL_ERROR,
2621 "CONNECT already confirmed. Unable to tell the client about the problem.");
2624 else if (byte_count)
2627 * Just hang up. We already transmitted the original headers
2628 * and parts of the original content and therefore missed the
2629 * chance to send an error message (without risking data corruption).
2631 * XXX: we could retry with a fancy range request here.
2633 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2634 "Unable to tell the client about the problem.");
2638 rsp = error_response(csp, "connect-failed", errno);
2641 send_crunch_response(csp, rsp);
2647 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2648 if (csp->flags & CSP_FLAG_CHUNKED)
2650 if ((len > 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2652 /* XXX: this is a temporary hack */
2653 log_error(LOG_LEVEL_CONNECT,
2654 "Looks like we reached the end of the last chunk. "
2655 "We better stop reading.");
2656 csp->expected_content_length = byte_count + (size_t)len;
2657 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2661 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2664 * Add a trailing zero to let be able to use string operations.
2665 * XXX: do we still need this with filter_popups gone?
2670 * Normally, this would indicate that we've read
2671 * as much as the server has sent us and we can
2672 * close the client connection. However, Microsoft
2673 * in its wisdom has released IIS/5 with a bug that
2674 * prevents it from sending the trailing \r\n in
2675 * a 302 redirect header (and possibly other headers).
2676 * To work around this if we've haven't parsed
2677 * a full header we'll append a trailing \r\n
2678 * and see if this now generates a valid one.
2680 * This hack shouldn't have any impacts. If we've
2681 * already transmitted the header or if this is a
2682 * SSL connection, then we won't bother with this
2683 * hack. So we only work on partially received
2684 * headers. If we append a \r\n and this still
2685 * doesn't generate a valid header, then we won't
2686 * transmit anything to the client.
2691 if (server_body || http->ssl)
2694 * If we have been buffering up the document,
2695 * now is the time to apply content modification
2696 * and send the result to the client.
2700 p = execute_content_filter(csp, content_filter);
2702 * If the content filter fails, use the original
2703 * buffer and length.
2704 * (see p != NULL ? p : csp->iob->cur below)
2708 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2711 if (JB_ERR_OK != update_server_headers(csp))
2713 log_error(LOG_LEVEL_FATAL,
2714 "Failed to update server headers. after filtering.");
2717 hdr = list_to_text(csp->headers);
2720 /* FIXME Should handle error properly */
2721 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2724 if (write_socket(csp->cfd, hdr, strlen(hdr))
2725 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
2727 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2737 break; /* "game over, man" */
2741 * This is NOT the body, so
2742 * Let's pretend the server just sent us a blank line.
2744 snprintf(buf, sizeof(buf), "\r\n");
2745 len = (int)strlen(buf);
2748 * Now, let the normal header parsing algorithm below do its
2749 * job. If it fails, we'll exit instead of continuing.
2756 * If this is an SSL connection or we're in the body
2757 * of the server document, just write it to the client,
2758 * unless we need to buffer the body for later content-filtering
2760 if (server_body || http->ssl)
2765 * If there is no memory left for buffering the content, or the buffer limit
2766 * has been reached, switch to non-filtering mode, i.e. make & write the
2767 * header, flush the iob and buf, and get out of the way.
2769 if (add_to_iob(csp, buf, len))
2774 log_error(LOG_LEVEL_INFO,
2775 "Flushing header and buffers. Stepping back from filtering.");
2777 hdr = list_to_text(csp->headers);
2781 * Memory is too tight to even generate the header.
2782 * Send our static "Out-of-memory" page.
2784 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2785 rsp = cgi_error_memory();
2786 send_crunch_response(csp, rsp);
2789 hdrlen = strlen(hdr);
2791 if (write_socket(csp->cfd, hdr, hdrlen)
2792 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
2793 || (write_socket(csp->cfd, buf, (size_t)len)))
2795 log_error(LOG_LEVEL_CONNECT,
2796 "Flush header and buffers to client failed: %E");
2802 * Reset the byte_count to the amount of bytes
2803 * we just flushed. len will be added a few lines below,
2804 * hdrlen doesn't matter for LOG_LEVEL_CLF.
2806 byte_count = (size_t)flushed;
2808 content_filter = NULL;
2814 if (write_socket(csp->cfd, buf, (size_t)len))
2816 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2820 byte_count += (size_t)len;
2825 const char *header_start;
2827 * We're still looking for the end of the server's header.
2828 * Buffer up the data we just read. If that fails, there's
2829 * little we can do but send our static out-of-memory page.
2831 if (add_to_iob(csp, buf, len))
2833 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2834 rsp = cgi_error_memory();
2835 send_crunch_response(csp, rsp);
2839 header_start = csp->iob->cur;
2841 /* Convert iob into something sed() can digest */
2842 if (JB_ERR_PARSE == get_server_headers(csp))
2847 * Well, we tried our MS IIS/5 hack and it didn't work.
2848 * The header is incomplete and there isn't anything
2849 * we can do about it.
2851 log_error(LOG_LEVEL_INFO,
2852 "MS IIS5 hack didn't produce valid headers.");
2858 * Since we have to wait for more from the server before
2859 * we can parse the headers we just continue here.
2865 /* Did we actually get anything? */
2866 if (NULL == csp->headers->first)
2868 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
2869 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2870 write_socket(csp->cfd, NO_SERVER_DATA_RESPONSE, strlen(NO_SERVER_DATA_RESPONSE));
2871 free_http_request(http);
2875 assert(csp->headers->first->str);
2877 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
2878 strncmpic(csp->headers->first->str, "ICY", 3))
2881 * It doesn't look like a HTTP (or Shoutcast) response:
2882 * tell the client and log the problem.
2884 if (strlen(csp->headers->first->str) > 30)
2886 csp->headers->first->str[30] = '\0';
2888 log_error(LOG_LEVEL_ERROR,
2889 "Invalid server or forwarder response. Starts with: %s",
2890 csp->headers->first->str);
2891 log_error(LOG_LEVEL_CLF,
2892 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2893 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2894 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2895 free_http_request(http);
2900 * We have now received the entire server header,
2901 * filter it and send the result to the client
2903 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
2905 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
2907 hdr = list_to_text(csp->headers);
2910 /* FIXME Should handle error properly */
2911 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2914 if (crunch_response_triggered(csp, crunchers_light))
2917 * One of the tags created by a server-header
2918 * tagger triggered a crunch. We already
2919 * delivered the crunch response to the client
2920 * and are done here after cleaning up.
2925 /* Buffer and pcrs filter this if appropriate. */
2927 if (!http->ssl) /* We talk plaintext */
2929 content_filter = get_filter_function(csp);
2932 * Only write if we're not buffering for content modification
2934 if (!content_filter)
2937 * Write the server's (modified) header to
2938 * the client (along with anything else that
2939 * may be in the buffer)
2942 if (write_socket(csp->cfd, hdr, strlen(hdr))
2943 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
2945 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
2948 * The write failed, so don't bother mentioning it
2949 * to the client... it probably can't hear us anyway.
2955 byte_count += (size_t)len;
2960 * XXX: the header lenght should probably
2961 * be calculated by get_server_headers().
2963 int header_length = csp->iob->cur - header_start;
2964 assert(csp->iob->cur > header_start);
2965 byte_count += (size_t)len - header_length;
2968 /* we're finished with the server's header */
2974 * If this was a MS IIS/5 hack then it means the server
2975 * has already closed the connection. Nothing more to read.
2980 log_error(LOG_LEVEL_INFO,
2981 "Closed server connection detected with MS IIS5 hack enabled.");
2988 * If we reach this point, the server socket is tainted
2989 * (most likely because we didn't read everything the
2990 * server sent us) and reusing it would lead to garbage.
2992 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
2994 log_error(LOG_LEVEL_CONNECT, "Unsetting keep-alive flag.");
2995 csp->flags &= ~CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE;
3000 if (csp->content_length == 0)
3003 * If Privoxy didn't recalculate the Content-Lenght,
3004 * byte_count is still correct.
3006 csp->content_length = byte_count;
3009 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
3010 csp->ip_addr_str, http->ocmd, csp->content_length);
3014 /*********************************************************************
3018 * Description : This is little more than chat. We only "serve" to
3019 * to close any socket that chat may have opened.
3022 * 1 : csp = Current client state (buffers, headers, etc...)
3026 *********************************************************************/
3028 void serve(struct client_state *csp)
3029 #else /* ifndef AMIGA */
3030 static void serve(struct client_state *csp)
3031 #endif /* def AMIGA */
3034 close_socket(csp->cfd);
3036 if (csp->sfd != JB_INVALID_SOCKET)
3038 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3039 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
3041 remember_connection(csp->sfd, csp->http, forward_url(csp, csp->http));
3045 forget_connection(csp->sfd);
3046 close_socket(csp->sfd);
3049 close_socket(csp->sfd);
3050 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3053 csp->flags &= ~CSP_FLAG_ACTIVE;
3059 /*********************************************************************
3061 * Function : server_thread
3063 * Description : We only exist to call `serve' in a threaded environment.
3066 * 1 : data = Current client state (buffers, headers, etc...)
3068 * Returns : Always 0.
3070 *********************************************************************/
3071 static int32 server_thread(void *data)
3073 serve((struct client_state *) data);
3080 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3081 /*********************************************************************
3085 * Description : Print usage info & exit.
3087 * Parameters : Pointer to argv[0] for identifying ourselves
3091 *********************************************************************/
3092 static void usage(const char *myname)
3094 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
3098 #endif /* defined(unix) */
3101 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
3102 #endif /* defined(unix) */
3103 "[--version] [configfile]\n"
3104 "Aborting\n", myname);
3109 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
3112 #ifdef MUTEX_LOCKS_AVAILABLE
3113 /*********************************************************************
3115 * Function : privoxy_mutex_lock
3117 * Description : Locks a mutex.
3120 * 1 : mutex = The mutex to lock.
3122 * Returns : Void. May exit in case of errors.
3124 *********************************************************************/
3125 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
3127 #ifdef FEATURE_PTHREAD
3128 int err = pthread_mutex_lock(mutex);
3131 if (mutex != &log_mutex)
3133 log_error(LOG_LEVEL_FATAL,
3134 "Mutex locking failed: %s.\n", strerror(err));
3139 EnterCriticalSection(mutex);
3140 #endif /* def FEATURE_PTHREAD */
3144 /*********************************************************************
3146 * Function : privoxy_mutex_unlock
3148 * Description : Unlocks a mutex.
3151 * 1 : mutex = The mutex to unlock.
3153 * Returns : Void. May exit in case of errors.
3155 *********************************************************************/
3156 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
3158 #ifdef FEATURE_PTHREAD
3159 int err = pthread_mutex_unlock(mutex);
3162 if (mutex != &log_mutex)
3164 log_error(LOG_LEVEL_FATAL,
3165 "Mutex unlocking failed: %s.\n", strerror(err));
3170 LeaveCriticalSection(mutex);
3171 #endif /* def FEATURE_PTHREAD */
3175 /*********************************************************************
3177 * Function : privoxy_mutex_init
3179 * Description : Prepares a mutex.
3182 * 1 : mutex = The mutex to initialize.
3184 * Returns : Void. May exit in case of errors.
3186 *********************************************************************/
3187 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
3189 #ifdef FEATURE_PTHREAD
3190 int err = pthread_mutex_init(mutex, 0);
3193 printf("Fatal error. Mutex initialization failed: %s.\n",
3198 InitializeCriticalSection(mutex);
3199 #endif /* def FEATURE_PTHREAD */
3201 #endif /* def MUTEX_LOCKS_AVAILABLE */
3203 /*********************************************************************
3205 * Function : initialize_mutexes
3207 * Description : Prepares mutexes if mutex support is available.
3211 * Returns : Void, exits in case of errors.
3213 *********************************************************************/
3214 static void initialize_mutexes(void)
3216 #ifdef MUTEX_LOCKS_AVAILABLE
3218 * Prepare global mutex semaphores
3220 privoxy_mutex_init(&log_mutex);
3221 privoxy_mutex_init(&log_init_mutex);
3222 privoxy_mutex_init(&connection_reuse_mutex);
3225 * XXX: The assumptions below are a bit naive
3226 * and can cause locks that aren't necessary.
3228 * For example older FreeBSD versions (< 6.x?)
3229 * have no gethostbyname_r, but gethostbyname is
3232 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
3233 privoxy_mutex_init(&resolver_mutex);
3234 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
3236 * XXX: should we use a single mutex for
3237 * localtime() and gmtime() as well?
3239 #ifndef HAVE_GMTIME_R
3240 privoxy_mutex_init(&gmtime_mutex);
3241 #endif /* ndef HAVE_GMTIME_R */
3243 #ifndef HAVE_LOCALTIME_R
3244 privoxy_mutex_init(&localtime_mutex);
3245 #endif /* ndef HAVE_GMTIME_R */
3248 privoxy_mutex_init(&rand_mutex);
3249 #endif /* ndef HAVE_RANDOM */
3250 #endif /* def MUTEX_LOCKS_AVAILABLE */
3254 /*********************************************************************
3258 * Description : Load the config file and start the listen loop.
3259 * This function is a lot more *sane* with the `load_config'
3260 * and `listen_loop' functions; although it stills does
3261 * a *little* too much for my taste.
3264 * 1 : argc = Number of parameters (including $0).
3265 * 2 : argv = Array of (char *)'s to the parameters.
3267 * Returns : 1 if : can't open config file, unrecognized directive,
3268 * stats requested in multi-thread mode, can't open the
3269 * log file, can't open the jar file, listen port is invalid,
3270 * any load fails, and can't bind port.
3272 * Else main never returns, the process must be signaled
3273 * to terminate execution. Or, on Windows, use the
3274 * "File", "Exit" menu option.
3276 *********************************************************************/
3278 int real_main(int argc, const char *argv[])
3280 int main(int argc, const char *argv[])
3284 unsigned int random_seed;
3286 struct passwd *pw = NULL;
3287 struct group *grp = NULL;
3290 char *pre_chroot_nslookup_to_load_resolver = NULL;
3297 #if !defined(_WIN32)
3305 * Parse the command line arguments
3307 * XXX: simply printing usage information in case of
3308 * invalid arguments isn't particularly user friendly.
3310 while (++argc_pos < argc)
3313 /* Check to see if the service must be installed or uninstalled */
3314 if (strncmp(argv[argc_pos], "--install", 9) == 0)
3316 const char *pName = argv[argc_pos] + 9;
3319 exit( (install_service(pName)) ? 0 : 1 );
3321 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
3323 const char *pName = argv[argc_pos] + 11;
3326 exit((uninstall_service(pName)) ? 0 : 1);
3328 else if (strcmp(argv[argc_pos], "--service" ) == 0)
3330 bRunAsService = TRUE;
3331 w32_set_service_cwd();
3332 atexit(w32_service_exit_notify);
3335 #endif /* defined(_WIN32) */
3338 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3340 if (strcmp(argv[argc_pos], "--help") == 0)
3345 else if(strcmp(argv[argc_pos], "--version") == 0)
3347 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
3353 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
3358 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
3360 if (++argc_pos == argc) usage(argv[0]);
3361 pidfile = strdup(argv[argc_pos]);
3364 else if (strcmp(argv[argc_pos], "--user" ) == 0)
3366 if (++argc_pos == argc) usage(argv[argc_pos]);
3368 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
3371 if (NULL == (grp = getgrnam(p)))
3373 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
3377 if (NULL == (pw = getpwnam(argv[argc_pos])))
3379 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
3382 if (p != NULL) *--p = '\0';
3385 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
3387 if (++argc_pos == argc) usage(argv[0]);
3388 pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
3391 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
3395 #endif /* defined(unix) */
3397 else if (argc_pos + 1 != argc)
3400 * This is neither the last command line
3401 * option, nor was it recognized before,
3402 * therefore it must be invalid.
3408 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3410 configfile = argv[argc_pos];
3413 } /* -END- while (more arguments) */
3416 if ( *configfile != '/' )
3418 char cwd[BUFFER_SIZE];
3420 size_t abs_file_size;
3422 /* make config-filename absolute here */
3423 if (NULL == getcwd(cwd, sizeof(cwd)))
3425 perror("failed to get current working directory");
3430 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3431 basedir = strdup(cwd);
3433 if (NULL == basedir ||
3434 NULL == (abs_file = malloc(abs_file_size)))
3436 perror("malloc failed");
3439 strlcpy(abs_file, basedir, abs_file_size);
3440 strlcat(abs_file, "/", abs_file_size );
3441 strlcat(abs_file, configfile, abs_file_size);
3442 configfile = abs_file;
3444 #endif /* defined unix */
3448 clients->next = NULL;
3450 /* XXX: factor out initialising after the next stable release. */
3453 #elif defined(_WIN32)
3457 /* Prepare mutexes if supported and necessary. */
3458 initialize_mutexes();
3460 /* Enable logging until further notice. */
3461 init_log_module(Argv[0]);
3463 random_seed = (unsigned int)time(NULL);
3465 srandom(random_seed);
3468 #endif /* ifdef HAVE_RANDOM */
3471 * Unix signal handling
3473 * Catch the abort, interrupt and terminate signals for a graceful exit
3474 * Catch the hangup signal so the errlog can be reopened.
3475 * Ignore the broken pipe signals (FIXME: Why?)
3477 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3480 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3481 const int ignored_signals[] = { SIGPIPE, 0 };
3483 for (idx = 0; catched_signals[idx] != 0; idx++)
3485 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3486 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3488 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3489 #endif /* ifdef sun */
3491 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3495 for (idx = 0; ignored_signals[idx] != 0; idx++)
3497 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3499 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3504 #else /* ifdef _WIN32 */
3505 # ifdef _WIN_CONSOLE
3507 * We *are* in a windows console app.
3508 * Print a verbose messages about FAQ's and such
3510 printf("%s", win32_blurb);
3511 # endif /* def _WIN_CONSOLE */
3512 #endif /* def _WIN32 */
3515 /* Initialize the CGI subsystem */
3516 cgi_init_error_messages();
3519 * If runnig on unix and without the --nodaemon
3520 * option, become a daemon. I.e. fork, detach
3521 * from tty and get process group leadership
3534 if ( pid < 0 ) /* error */
3539 else if ( pid != 0 ) /* parent */
3544 * must check for errors
3545 * child died due to missing files aso
3548 wpid = waitpid( pid, &status, WNOHANG );
3557 /* Should be more portable, but not as well tested */
3562 #else /* ndef __FreeBSD__ */
3564 #endif /* ndef __FreeBSD__ */
3565 fd = open("/dev/tty", O_RDONLY);
3568 /* no error check here */
3569 ioctl( fd, TIOCNOTTY,0 );
3574 * stderr (fd 2) will be closed later on, when the
3575 * log file has been parsed.
3582 } /* -END- if (!no_daemon) */
3585 * As soon as we have written the PID file, we can switch
3586 * to the user and group ID indicated by the --user option
3592 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3594 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3600 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3602 /* Read the time zone file from /etc before doing chroot. */
3604 if (NULL != pre_chroot_nslookup_to_load_resolver
3605 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3607 /* Initialize resolver library. */
3608 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3610 if (chroot(pw->pw_dir) < 0)
3612 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3616 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3619 if (setuid(pw->pw_uid))
3621 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3625 char putenv_dummy[64];
3627 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3628 if (putenv(putenv_dummy) != 0)
3630 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3633 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3634 if (putenv(putenv_dummy) != 0)
3636 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3642 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3645 #endif /* defined unix */
3648 /* This will be FALSE unless the command line specified --service
3652 /* Yup, so now we must attempt to establish a connection
3653 * with the service dispatcher. This will only work if this
3654 * process was launched by the service control manager to
3655 * actually run as a service. If this isn't the case, i've
3656 * known it take around 30 seconds or so for the call to return.
3659 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3660 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3662 /* Service has run, and at this point is now being stopped, so just return */
3667 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3669 /* An error occurred. Usually it's because --service was wrongly specified
3670 * and we were unable to connect to the Service Control Dispatcher because
3671 * it wasn't expecting us and is therefore not listening.
3673 * For now, just continue below to call the listen_loop function.
3676 #endif /* def _WIN32 */
3686 /*********************************************************************
3688 * Function : bind_port_helper
3690 * Description : Bind the listen port. Handles logging, and aborts
3694 * 1 : config = Privoxy configuration. Specifies port
3697 * Returns : Port that was opened.
3699 *********************************************************************/
3700 static jb_socket bind_port_helper(struct configuration_spec * config)
3705 if (config->haddr == NULL)
3707 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3712 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3713 config->hport, config->haddr);
3716 result = bind_port(config->haddr, config->hport, &bfd);
3723 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3724 "There may be another Privoxy or some other "
3725 "proxy running on port %d",
3726 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
3727 config->hport, config->hport);
3730 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3731 "The hostname is not resolvable",
3732 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3735 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
3736 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3739 /* shouldn't get here */
3740 return JB_INVALID_SOCKET;
3743 config->need_bind = 0;
3750 /* Without this simple workaround we get this compiler warning from _beginthread
3751 * warning C4028: formal parameter 1 different from declaration
3753 void w32_service_listen_loop(void *p)
3757 #endif /* def _WIN32 */
3760 /*********************************************************************
3762 * Function : listen_loop
3764 * Description : bind the listen port and enter a "FOREVER" listening loop.
3770 *********************************************************************/
3771 static void listen_loop(void)
3773 struct client_state *csp = NULL;
3775 struct configuration_spec * config;
3777 config = load_config();
3779 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3781 * XXX: Should be relocated once it no
3782 * longer needs to emit log messages.
3784 initialize_reusable_connections();
3785 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3787 bfd = bind_port_helper(config);
3789 #ifdef FEATURE_GRACEFUL_TERMINATION
3790 while (!g_terminate)
3795 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
3796 while (waitpid(-1, NULL, WNOHANG) > 0)
3798 /* zombie children */
3800 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
3803 * Free data that was used by died threads
3809 * Re-open the errlog after HUP signal
3811 if (received_hup_signal)
3813 if (NULL != config->logfile)
3815 init_error_log(Argv[0], config->logfile);
3817 received_hup_signal = 0;
3821 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
3823 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
3827 csp->flags |= CSP_FLAG_ACTIVE;
3828 csp->sfd = JB_INVALID_SOCKET;
3830 csp->config = config = load_config();
3832 if ( config->need_bind )
3835 * Since we were listening to the "old port", we will not see
3836 * a "listen" param change until the next IJB request. So, at
3837 * least 1 more request must be made for us to find the new
3838 * setting. I am simply closing the old socket and binding the
3841 * Which-ever is correct, we will serve 1 more page via the
3842 * old settings. This should probably be a "show-proxy-args"
3843 * request. This should not be a so common of an operation
3844 * that this will hurt people's feelings.
3849 bfd = bind_port_helper(config);
3852 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
3854 if (!accept_connection(csp, bfd))
3856 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
3869 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
3872 #ifdef FEATURE_TOGGLE
3873 if (global_toggle_state)
3874 #endif /* def FEATURE_TOGGLE */
3876 csp->flags |= CSP_FLAG_TOGGLED_ON;
3879 if (run_loader(csp))
3881 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
3882 /* Never get here - LOG_LEVEL_FATAL causes program exit */
3886 if (block_acl(NULL,csp))
3888 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
3889 close_socket(csp->cfd);
3893 #endif /* def FEATURE_ACL */
3895 /* add it to the list of clients */
3896 csp->next = clients->next;
3897 clients->next = csp;
3899 if (config->multi_threaded)
3903 /* this is a switch () statment in the C preprocessor - ugh */
3904 #undef SELECTED_ONE_OPTION
3906 /* Use Pthreads in preference to native code */
3907 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
3908 #define SELECTED_ONE_OPTION
3910 pthread_t the_thread;
3911 pthread_attr_t attrs;
3913 pthread_attr_init(&attrs);
3914 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
3915 errno = pthread_create(&the_thread, &attrs,
3916 (void * (*)(void *))serve, csp);
3917 child_id = errno ? -1 : 0;
3918 pthread_attr_destroy(&attrs);
3922 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
3923 #define SELECTED_ONE_OPTION
3924 child_id = _beginthread(
3925 (void (*)(void *))serve,
3930 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
3931 #define SELECTED_ONE_OPTION
3932 child_id = _beginthread(
3933 (void(* _Optlink)(void*))serve,
3939 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
3940 #define SELECTED_ONE_OPTION
3942 thread_id tid = spawn_thread
3943 (server_thread, "server", B_NORMAL_PRIORITY, csp);
3945 if ((tid >= 0) && (resume_thread(tid) == B_OK))
3947 child_id = (int) tid;
3956 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
3957 #define SELECTED_ONE_OPTION
3958 csp->cfd = ReleaseSocket(csp->cfd, -1);
3961 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3962 NP_Output, Output(),
3963 NP_CloseOutput, FALSE,
3964 NP_Name, (ULONG)"privoxy child",
3968 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3969 NP_Output, Output(),
3970 NP_CloseOutput, FALSE,
3971 NP_Name, (ULONG)"privoxy child",
3972 NP_StackSize, 200*1024,
3978 ((struct Task *)child_id)->tc_UserData = csp;
3979 Signal((struct Task *)child_id, SIGF_SINGLE);
3984 #if !defined(SELECTED_ONE_OPTION)
3987 /* This block is only needed when using fork().
3988 * When using threads, the server thread was
3989 * created and run by the call to _beginthread().
3991 if (child_id == 0) /* child */
3994 #ifdef FEATURE_TOGGLE
3995 int inherited_toggle_state = global_toggle_state;
3996 #endif /* def FEATURE_TOGGLE */
4001 * If we've been toggled or we've blocked the request, tell Mom
4004 #ifdef FEATURE_TOGGLE
4005 if (inherited_toggle_state != global_toggle_state)
4007 rc |= RC_FLAG_TOGGLED;
4009 #endif /* def FEATURE_TOGGLE */
4011 #ifdef FEATURE_STATISTICS
4012 if (csp->flags & CSP_FLAG_REJECTED)
4014 rc |= RC_FLAG_BLOCKED;
4016 #endif /* ndef FEATURE_STATISTICS */
4020 else if (child_id > 0) /* parent */
4022 /* in a fork()'d environment, the parent's
4023 * copy of the client socket and the CSP
4027 #if !defined(_WIN32) && !defined(__CYGWIN__)
4029 wait( &child_status );
4032 * Evaluate child's return code: If the child has
4033 * - been toggled, toggle ourselves
4034 * - blocked its request, bump up the stats counter
4037 #ifdef FEATURE_TOGGLE
4038 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
4040 global_toggle_state = !global_toggle_state;
4042 #endif /* def FEATURE_TOGGLE */
4044 #ifdef FEATURE_STATISTICS
4046 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
4050 #endif /* def FEATURE_STATISTICS */
4052 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
4053 close_socket(csp->cfd);
4054 csp->flags &= ~CSP_FLAG_ACTIVE;
4058 #undef SELECTED_ONE_OPTION
4059 /* end of cpp switch () */
4061 if (child_id < 0) /* failed */
4063 char buf[BUFFER_SIZE];
4065 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
4067 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
4069 write_socket(csp->cfd, buf, strlen(buf));
4070 close_socket(csp->cfd);
4071 csp->flags &= ~CSP_FLAG_ACTIVE;
4082 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
4084 /* Clean up. Aim: free all memory (no leaks) */
4085 #ifdef FEATURE_GRACEFUL_TERMINATION
4087 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
4089 unload_current_config_file();
4090 unload_current_actions_file();
4091 unload_current_re_filterfile();
4092 #ifdef FEATURE_TRUST
4093 unload_current_trust_file();
4096 if (config->multi_threaded)
4103 } while ((clients->next != NULL) && (--i > 0));
4107 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
4118 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
4119 /* Cleanup - remove taskbar icon etc. */
4124 #endif /* FEATURE_GRACEFUL_TERMINATION */