1 const char jcc_rcs[] = "$Id: jcc.c,v 1.200 2008/10/26 16:53:18 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 1.200 2008/10/26 16:53:18 fabiankeil
39 * Revision 1.199 2008/10/26 15:36:10 fabiankeil
40 * Remove two debug messages with LOG_LEVEL_INFO.
42 * Revision 1.198 2008/10/22 15:19:55 fabiankeil
43 * Once More, With Feeling: if there is no logfile
44 * because the user didn't specify one, we shouldn't
45 * call init_error_log() after receiving SIGHUP either.
47 * Revision 1.197 2008/10/20 17:02:40 fabiankeil
48 * If SIGHUP is received while we aren't running in daemon
49 * mode, calling init_error_log() would be a mistake.
51 * Revision 1.196 2008/10/16 09:16:41 fabiankeil
52 * - Fix two gcc44 conversion warnings.
53 * - Don't bother logging the last five bytes
56 * Revision 1.195 2008/10/13 16:04:37 fabiankeil
57 * Make sure we don't try to reuse tainted server sockets.
59 * Revision 1.194 2008/10/12 18:35:18 fabiankeil
60 * The last commit was a bit too ambitious, apparently the content
61 * length adjustment is only necessary if we aren't buffering.
63 * Revision 1.193 2008/10/12 15:57:35 fabiankeil
64 * Fix content length calculation if we read headers
65 * and the start of the body at once. Now that we have
66 * FEATURE_CONNECTION_KEEP_ALIVE, it actually matters.
68 * Revision 1.192 2008/10/11 18:19:14 fabiankeil
69 * Even more chat() cosmetics.
71 * Revision 1.191 2008/10/11 18:00:14 fabiankeil
72 * Reformat some comments in chat().
74 * Revision 1.190 2008/10/11 14:58:00 fabiankeil
75 * In case of chunk-encoded content, stop reading if
76 * the buffer looks like it ends with the last chunk.
78 * Revision 1.189 2008/10/11 09:53:00 fabiankeil
79 * Let server_response_is_complete() deal properly with
80 * content that is neither buffered nor read all at once.
82 * Revision 1.188 2008/10/09 18:21:41 fabiankeil
83 * Flush work-in-progress changes to keep outgoing connections
84 * alive where possible. Incomplete and mostly #ifdef'd out.
86 * Revision 1.187 2008/09/07 12:35:05 fabiankeil
87 * Add mutex lock support for _WIN32.
89 * Revision 1.186 2008/09/04 08:13:58 fabiankeil
90 * Prepare for critical sections on Windows by adding a
91 * layer of indirection before the pthread mutex functions.
93 * Revision 1.185 2008/08/30 12:03:07 fabiankeil
94 * Remove FEATURE_COOKIE_JAR.
96 * Revision 1.184 2008/08/22 15:34:45 fabiankeil
97 * - Silence LLVM/Clang complaint.
98 * - Make received_hup_signal static.
99 * - Hide definitions for basedir, pidfile and received_hup_signal
100 * from __EMX__ as they only seem to be used in case of #ifdef unix.
102 * Revision 1.183 2008/08/21 07:09:35 fabiankeil
103 * Accept Shoutcast responses again. Problem reported
104 * and fix suggested by Stefan in #2062860.
106 * Revision 1.182 2008/06/27 11:13:56 fabiankeil
107 * Fix possible NULL-pointer dereference reported
108 * by din_a4 in #2003937. Pointy hat to me.
110 * Revision 1.181 2008/05/21 15:47:15 fabiankeil
111 * Streamline sed()'s prototype and declare
112 * the header parse and add structures static.
114 * Revision 1.180 2008/05/21 15:26:32 fabiankeil
115 * - Mark csp as immutable for send_crunch_response().
116 * - Fix comment spelling.
118 * Revision 1.179 2008/05/20 20:13:32 fabiankeil
119 * Factor update_server_headers() out of sed(), ditch the
120 * first_run hack and make server_patterns_light static.
122 * Revision 1.178 2008/05/10 13:23:38 fabiankeil
123 * Don't provide get_header() with the whole client state
124 * structure when it only needs access to csp->iob.
126 * Revision 1.177 2008/05/10 11:51:12 fabiankeil
127 * Make the "read the rest of the headers" loop a bit more readable.
129 * Revision 1.176 2008/05/10 11:37:57 fabiankeil
130 * - Instead of logging when the IIS5 hack is enabled, log when it fails.
131 * - Remove useless comment.
133 * Revision 1.175 2008/05/09 18:53:59 fabiankeil
134 * Fix comment grammar.
136 * Revision 1.174 2008/05/07 18:05:53 fabiankeil
137 * Remove the pointless buffer in client_protocol_is_unsupported().
139 * Revision 1.173 2008/05/06 15:09:00 fabiankeil
140 * Least-effort fix for bug #1821930 (reported by Lee):
141 * If the response doesn't look like HTTP,
142 * tell the client and log the problem.
144 * Revision 1.172 2008/04/16 16:38:21 fabiankeil
145 * Don't pass the whole csp structure to flush_socket()
146 * when it only needs a file descriptor and a buffer.
148 * Revision 1.171 2008/03/27 18:27:25 fabiankeil
149 * Remove kill-popups action.
151 * Revision 1.170 2008/03/06 16:33:46 fabiankeil
152 * If limit-connect isn't used, don't limit CONNECT requests to port 443.
154 * Revision 1.169 2008/03/04 18:30:39 fabiankeil
155 * Remove the treat-forbidden-connects-like-blocks action. We now
156 * use the "blocked" page for forbidden CONNECT requests by default.
158 * Revision 1.168 2008/03/02 12:25:25 fabiankeil
159 * Also use shiny new connect_port_is_forbidden() in jcc.c.
161 * Revision 1.167 2008/02/23 16:57:12 fabiankeil
162 * Rename url_actions() to get_url_actions() and let it
163 * use the standard parameter ordering.
165 * Revision 1.166 2008/02/23 16:33:43 fabiankeil
166 * Let forward_url() use the standard parameter ordering
167 * and mark its second parameter immutable.
169 * Revision 1.165 2008/02/02 19:36:56 fabiankeil
170 * Remove the "Listening ... for local connections only" log message.
171 * Whether or not remote connections are able to reach Privoxy is up
172 * to the operating system.
174 * Revision 1.164 2007/12/16 18:32:46 fabiankeil
175 * Prevent the log messages for CONNECT requests to unacceptable
176 * ports from printing the limit-connect argument as [null] if
177 * limit-connect hasn't been explicitly enabled.
179 * Revision 1.163 2007/12/13 01:47:11 david__schmidt
180 * Make sure all console-mode apps get a usage() instance
182 * Revision 1.162 2007/12/06 17:54:57 fabiankeil
183 * Reword NO_SERVER_DATA_RESPONSE to make it harder
184 * to misunderstand what the message is all about.
186 * Revision 1.161 2007/12/04 19:44:22 fabiankeil
187 * Unbreak trustfile which previously didn't work without
188 * FEATURE_TOGGLE. Fixes BR#1843585, reported by Lee.
190 * Revision 1.160 2007/11/29 18:00:29 fabiankeil
191 * Plug memory leak. Spotted by Valgrind, triggered by
192 * Privoxy-Regression-Test feeding proxyfuzz.py.
194 * Revision 1.159 2007/11/24 14:34:09 fabiankeil
195 * In the HTTP snipplets, refer to the client as client.
197 * Revision 1.158 2007/11/11 16:44:17 fabiankeil
198 * Emit a log message when activating the MS IIS5 hack.
200 * Revision 1.157 2007/11/03 17:34:49 fabiankeil
201 * Log the "weak randomization factor" warning only
202 * once for mingw32 and provide some more details.
204 * Revision 1.156 2007/11/01 18:20:58 fabiankeil
205 * Initialize log module after initializing mutexes, future
206 * deadlocks in that code should now work cross-platform.
208 * Revision 1.155 2007/10/23 20:12:45 fabiankeil
209 * Fix first CSUCCEED line to end in \r\n as required by RFC1945.
210 * Reported by Bert van Leeuwen in BR#1818808.
212 * Revision 1.154 2007/10/19 17:00:08 fabiankeil
213 * Downgrade "Flushing header and buffers" message to LOG_LEVEL_INFO.
215 * Revision 1.153 2007/10/14 14:12:41 fabiankeil
216 * When in daemon mode, close stderr after the configuration file has been
217 * parsed the first time. If logfile isn't set, stop logging. Fixes BR#897436.
219 * Revision 1.152 2007/10/04 18:03:34 fabiankeil
220 * - Fix a crash when parsing invalid requests whose first header
221 * is rejected by get_header(). Regression (re?)introduced
222 * in r1.143 by yours truly.
223 * - Move ACTION_VANILLA_WAFER handling into parsers.c's
224 * client_cookie_adder() to make sure send-vanilla-wafer can be
225 * controlled through tags (and thus regression-tested).
227 * Revision 1.151 2007/09/29 10:21:16 fabiankeil
228 * - Move get_filter_function() from jcc.c to filters.c
229 * so the filter functions can be static.
230 * - Don't bother filtering body-less responses.
232 * Revision 1.150 2007/09/28 16:39:29 fabiankeil
233 * Execute content filters through execute_content_filter().
235 * Revision 1.149 2007/09/04 15:08:48 fabiankeil
236 * Initialize req to NULL to make sure it's defined if the
237 * first read_socket() call fails. Reported by icmp30.
239 * Revision 1.148 2007/08/26 16:47:13 fabiankeil
240 * Add Stephen Gildea's --pre-chroot-nslookup patch [#1276666],
241 * extensive comments moved to user manual.
243 * Revision 1.147 2007/08/25 14:42:40 fabiankeil
244 * Don't crash if a broken header filter wiped out the request line.
246 * Revision 1.146 2007/08/20 17:09:32 fabiankeil
247 * Fix byte_count calculation in case of flushes
248 * and don't parse the server headers a second time.
250 * Revision 1.145 2007/08/19 13:13:31 fabiankeil
251 * - If there's a connection problem after we already forwarded
252 * parts of the original content, just hang up. Fixes BR#1776724.
253 * - Fix warnings about unused code on mingw32.
254 * - In case of flushes, calculate the byte count
255 * less incorrectly (I think).
257 * Revision 1.144 2007/08/11 14:43:22 fabiankeil
258 * Add some more prototypes for static functions.
260 * Revision 1.143 2007/08/05 13:58:19 fabiankeil
261 * Comment out request_contains_null_bytes() until it's used again.
263 * Revision 1.142 2007/08/05 13:50:26 fabiankeil
264 * #1763173 from Stefan Huehner: s@const static@static const@
265 * and declare some more functions static.
267 * Revision 1.141 2007/08/04 09:56:23 fabiankeil
268 * - Log rejected CONNECT requests with LOG_LEVEL_INFO
269 * and explain why they were rejected in the first place.
270 * - Fix the LOG_LEVEL_CLF message for crunches of unallowed
271 * CONNECT requests. The request line was missing.
272 * - Add two more XXX reminders as we don't have enough already.
274 * Revision 1.140 2007/07/21 11:51:36 fabiankeil
275 * As Hal noticed, checking dispatch_cgi() as the last cruncher
276 * looks like a bug if CGI requests are blocked unintentionally,
277 * so don't do it unless the user enabled the new config option
278 * "allow-cgi-request-crunching".
280 * Revision 1.139 2007/07/14 07:46:41 fabiankeil
281 * - Allow to rewrite the request destination behind the client's back.
282 * - Turn the weird-looking unconditional for loop that
283 * reads the client request into a conditional while loop.
284 * Move the stuff that only runs once out of the loop.
285 * - Move parts of chat(), server_content_type() and the
286 * necessary stuff to fix BR#1750917 into get_filter_function().
288 * Revision 1.138 2007/06/03 18:45:18 fabiankeil
289 * Temporary workaround for BR#1730105.
291 * Revision 1.137 2007/06/01 18:16:36 fabiankeil
292 * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
293 * deadlocks and crashes on OpenBSD and possibly other OS with neither
294 * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
295 * Thanks to Ralf Horstmann for report and solution.
297 * Revision 1.136 2007/06/01 16:41:11 fabiankeil
298 * Add forward-override{} to change the forwarding settings through
299 * action sections. This is mainly interesting to forward different
300 * clients differently (for example based on User-Agent or request
303 * Revision 1.135 2007/05/24 17:03:50 fabiankeil
304 * - Let usage() mention the --chroot parameter.
305 * - Use read_socket() consistently and always leave
306 * the last buffer byte alone, even in cases where
307 * null termination (currently) doesn't matter.
309 * Revision 1.134 2007/05/16 14:59:46 fabiankeil
310 * - Fix config file loading on Unix if no config file is specified.
311 * Since r1.97 Privoxy would always interpret the last argument as
312 * config file, even if it's a valid command line option.
313 * - Abort in case of unrecognized command line options. Closes #1719696.
314 * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
315 * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
317 * Revision 1.133 2007/05/04 11:23:19 fabiankeil
318 * - Don't rerun crunchers that only depend on the request URL.
319 * - Don't count redirects and CGI requests as "blocked requests".
321 * Revision 1.132 2007/04/25 15:15:17 fabiankeil
322 * Support crunching based on tags created by server-header taggers.
324 * Revision 1.131 2007/04/22 13:24:50 fabiankeil
325 * Make HTTP snippets static (again). Add a Content-Type for those
326 * with content so the browser doesn't guess it based on the URL.
328 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
329 * Move crunching and request line rebuilding out of chat().
331 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
332 * Introduce tags as alternative way to specify which
333 * actions apply to a request. At the moment tags can be
334 * created based on client and server headers.
336 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
337 * Don't CLF-log CONNECT requests twice.
339 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
340 * Log the source address for ACL-related connection drops.
342 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
343 * New config option: enforce-blocks.
345 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
346 * - Move null byte check into separate function.
347 * - Don't confuse the client with error pages
348 * if a CONNECT request was already confirmed.
350 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
351 * Speed up NULL byte escaping and only log the complete
352 * NULL byte requests with header debugging enabled.
354 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
355 * Answer requests that contain NULL bytes with
356 * a custom response instead of waiting for more
357 * data until the client eventually hangs up.
359 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
360 * - Move delivery and logging of crunched responses
361 * from chat() into send_crunch_response().
362 * - Display the reason for generating http_responses.
363 * - Log the content length for LOG_LEVEL_CLF correctly
364 * (still incorrect for some fixed responses).
365 * - Reword an incorrect comment about
366 * treat-forbidden-connects-like-blocks violating
368 * - Add some log messages.
370 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
371 * Move mutex initialization into separate
372 * function and exit in case of errors.
374 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
375 * - Start to reduce chat()'s line count and move
376 * parts of it into separate functions.
377 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
379 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
380 * - Add Proxy-Agent header to HTTP snippets that are
381 * supposed to reach HTTP clients only.
382 * - Made a few CONNECT log messages more descriptive.
383 * - Catch completely empty server responses (as seen
384 * with Tor's fake ".noconnect" top level domain).
385 * - Use shiny new "forwarding-failed" template for socks errors.
387 * Revision 1.118 2007/01/07 07:43:43 joergs
388 * AmigaOS4 support added.
390 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
391 * Added config option accept-intercepted-requests
392 * and disabled it by default.
394 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
395 * Reverted parts of my last commit
396 * to keep error handling working.
398 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
399 * Fixed gcc43 conversion warnings.
401 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
402 * Fix -pedantic ISO C warning about converting
403 * from function pointer to object pointer.
405 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
406 * Silence compiler warning I introduced with my last commit.
408 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
409 * Mutex protect rand() if POSIX threading
410 * is used, warn the user if that's not possible
411 * and stop using it on _WIN32 where it could
414 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
415 * Don't prevent core dumps by catching SIGABRT.
416 * It's rude and makes debugging unreasonable painful.
418 * Revision 1.110 2006/12/13 14:52:53 etresoft
419 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
421 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
422 * Privoxy is now able to run as intercepting
423 * proxy in combination with any packet filter
424 * that does the port redirection. The destination
425 * is extracted from the "Host:" header which
426 * should be available for nearly all requests.
428 * Moved HTTP snipplets into jcc.c.
429 * Added error message for gopher proxy requests.
431 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
432 * Only unlink the pidfile if it's actually used.
434 * Change order of interception checks to make
435 * it possible to block or redirect requests for
438 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
439 * Make pthread mutex locking more generic. Instead of
440 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
441 * and use mutex locking unless there is an _r function
442 * available. Better safe than sorry.
444 * Fixes "./configure --disable-pthread" and should result
445 * in less threading-related problems on pthread-using platforms,
446 * but it still doesn't fix BR#1122404.
448 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
449 * Move pthread.h inclusion from jcc.c to jcc.h.
450 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
452 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
453 * Don't exit after receiving the second SIGHUP on Solaris.
455 * Fixes BR 1052235, but the same problem may exist on other
456 * systems. Once 3.0.6 is out we should use sigset()
457 * where available and see if it breaks anything.
459 * Revision 1.104 2006/09/23 13:26:38 roro
460 * Replace TABs by spaces in source code.
462 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
463 * Fix +redirect{}. Didn't work with -fast-redirects.
465 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
466 * Respond with 400 and a short text message
467 * if the client tries to use Privoxy as FTP proxy.
469 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
470 * Make number of retries in case of forwarded-connect problems
471 * a config file option (forwarded-connect-retries) and use 0 as
474 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
475 * Set random(3) seed.
477 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
478 * Follow the OpenBSD port's lead and protect the resolve
479 * functions on OpenBSD as well.
481 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
482 * --user fix. Only use the user as group if no group is specified.
483 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
485 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
486 * Windows service (re-)integration
490 * --install[:service_name]
491 * --uninstall[:service_name]
494 * They work as follows:
495 * --install will create a service for you and then terminate.
496 * By default the service name will be "privoxy" (without the quotes).
497 * However you can run multiple services if you wish, just by adding
498 * a colon and then a name (no spaces).
500 * --uninstall follows the exact same rules a --install.
502 * --service is used when the program is executed by the service
503 * control manager, and in normal circumstances would never be
504 * used as a command line argument.
506 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
507 * Windows service integration
509 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
510 * Incorporate Fabian Keil's patch work:
511 http://www.fabiankeil.de/sourcecode/privoxy/
513 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
514 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
515 * with what was really the latest development (the v_3_0_branch branch)
517 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
518 * Thanks to Jindrich Makovicka for a race condition fix for the log
519 * file. The race condition remains for non-pthread implementations.
520 * Reference patch #1175720.
522 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
523 * Add the ability to check jpeg images for invalid
524 * lengths of comment blocks. Defensive strategy
525 * against the exploit:
526 * Microsoft Security Bulletin MS04-028
527 * Buffer Overrun in JPEG Processing (GDI+) Could
528 * Allow Code Execution (833987)
529 * Enabled with +inspect-jpegs in actions files.
531 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
532 * - Fixed usage info for non-unix platforms
533 * - Fixed small cmdline parsing bug
535 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
536 * Diagnostics: Now preserve the returncode of pthread_create
537 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
539 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
540 * No longer ignore SIGCHLD. Fixes bug #769381
542 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
543 * Close jarfile on graceful exit, remove stray line
545 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
546 * Cosmetics: Killed a warning, a typo and an allocation left at exit
548 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
549 * No longer rely on non-POSIX.1 extensions of getcwd().
552 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
553 * Replaced setenv() by posix-compliant putenv()
554 * Thanks to Neil McCalden (nmcc AT users.sf.net).
556 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
557 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
559 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
560 * Clean-up and extension of improvements for forked mode:
561 * - Child's return code now consists of flags RC_FLAG_*
562 * - Reporting toggle to parent now properly #ifdef'ed
563 * - Children now report blocking to parent. This enables
564 * statistics in forked mode
566 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
567 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
568 * Children now report having been toggled through _exit(17), parents
569 * watch for that code and toggle themselves if found.
571 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
572 * Wrapping all *_r functions (the non-_r versions of them) with
573 * mutex semaphores for OSX. Hopefully this will take care of all
574 * of those pesky crash reports.
576 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
577 * Fixed two mostly harmless mem leaks
579 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
580 * Fix: Head of global clients list now initialized to NULL
582 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
583 * Added basic support for OPTIONS and TRACE HTTP methods:
584 * - New interceptor direct_response() added in chat().
585 * - sed() moved to earlier in the process, so that the
586 * Host: header is evaluated before actions and forwarding
589 * Revision 1.92 2002/05/08 16:00:46 oes
590 * Chat's buffer handling:
591 * - Fixed bug with unchecked out-of-mem conditions
592 * while reading client request & server headers
593 * - No longer predict if the buffer limit will be exceeded
594 * in the next read -- check add_to_iob's new
595 * return code. If buffer couldn't be extended
596 * (policy or out-of-mem) while
597 * - reading from client: abort
598 * - reading server headers: send error page
599 * - buffering server body for filter: flush,
600 * and if that fails: send error page
602 * Revision 1.91 2002/04/08 20:35:58 swa
605 * Revision 1.90 2002/04/02 14:57:28 oes
606 * Made sending wafers independent of FEATURE_COOKIE_JAR
608 * Revision 1.89 2002/03/31 17:18:59 jongfoster
609 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
611 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
612 * More compiler warning message maintenance
614 * Revision 1.87 2002/03/26 22:29:54 swa
615 * we have a new homepage!
617 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
618 * Workaround for closing the jarfile before load_config() comes around again
620 * Revision 1.85 2002/03/24 15:23:33 jongfoster
623 * Revision 1.84 2002/03/24 13:25:43 swa
624 * name change related issues
626 * Revision 1.83 2002/03/16 23:54:06 jongfoster
627 * Adding graceful termination feature, to help look for memory leaks.
628 * If you enable this (which, by design, has to be done by hand
629 * editing config.h) and then go to http://i.j.b/die, then the program
630 * will exit cleanly after the *next* request. It should free all the
631 * memory that was used.
633 * Revision 1.82 2002/03/13 00:27:05 jongfoster
636 * Revision 1.81 2002/03/12 01:42:50 oes
637 * Introduced modular filters
639 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
640 * OS/2 port maintenance:
641 * - Fixed EMX build - it had decayed a little
642 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
643 * substituted a memset for now.
645 * Revision 1.79 2002/03/09 20:03:52 jongfoster
646 * - Making various functions return int rather than size_t.
647 * (Undoing a recent change). Since size_t is unsigned on
648 * Windows, functions like read_socket that return -1 on
649 * error cannot return a size_t.
651 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
652 * crashes, and also frequently caused JB to jump to 100%
653 * CPU and stay there. (Because it thought it had just
654 * read ((unsigned)-1) == 4Gb of data...)
656 * - The signature of write_socket has changed, it now simply
657 * returns success=0/failure=nonzero.
659 * - Trying to get rid of a few warnings --with-debug on
660 * Windows, I've introduced a new type "jb_socket". This is
661 * used for the socket file descriptors. On Windows, this
662 * is SOCKET (a typedef for unsigned). Everywhere else, it's
663 * an int. The error value can't be -1 any more, so it's
664 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
665 * Windows it maps to the #define INVALID_SOCKET.)
667 * - The signature of bind_port has changed.
669 * Revision 1.78 2002/03/08 21:35:04 oes
670 * Added optional group supplement to --user option. Will now use default group of user if no group given
672 * Revision 1.77 2002/03/07 03:52:06 oes
673 * - Fixed compiler warnings etc
674 * - Improved handling of failed DNS lookups
676 * Revision 1.76 2002/03/06 22:54:35 jongfoster
677 * Automated function-comment nitpicking.
679 * Revision 1.75 2002/03/06 10:02:19 oes
680 * Fixed stupid bug when --user was not given
682 * Revision 1.74 2002/03/06 00:49:31 jongfoster
683 * Fixing warning on Windows
684 * Making #ifdefs that refer to the same variable consistently
685 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
687 * Revision 1.73 2002/03/05 23:57:30 hal9
688 * Stray character 's' on line 1618 was breaking build.
690 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
691 * - Re-enable OS/2 building after new parms were added
692 * - Fix false out of memory report when resolving CGI templates when no IP
693 * address is available of failed attempt (a la no such domain)
695 * Revision 1.71 2002/03/05 18:13:56 oes
696 * Added --user option
698 * Revision 1.70 2002/03/05 04:52:42 oes
699 * Deleted non-errlog debugging code
701 * Revision 1.69 2002/03/04 23:50:00 jongfoster
702 * Splitting off bind_port() call into bind_port_helper(), with
705 * Revision 1.68 2002/03/04 20:17:32 oes
708 * Revision 1.67 2002/03/04 18:18:57 oes
709 * - Removed _DEBUG mode
710 * - Cleand up cmdline parsing
711 * - Introduced --no-daemon, --pidfile options
712 * - Cleaned up signal handling:
713 * - Terminate cleanly on INT, TERM and ABRT
714 * - Schedule logfile for re-opening on HUP
715 * - Ignore CHLD and PIPE
716 * - Leave the rest with their default handlers
717 * - Uniform handler registration
718 * - Added usage() function
719 * - Played styleguide police
721 * Revision 1.66 2002/03/03 15:06:55 oes
722 * Re-enabled automatic config reloading
724 * Revision 1.65 2002/03/03 14:49:11 oes
725 * Fixed CLF logging: Now uses client's original HTTP request
727 * Revision 1.64 2002/03/03 09:18:03 joergs
728 * Made jumbjuster work on AmigaOS again.
730 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
731 * Clean up a little CRLF unpleasantness that suddenly appeared
733 * Revision 1.62 2002/02/20 23:17:23 jongfoster
734 * Detecting some out-of memory conditions and exiting with a log message.
736 * Revision 1.61 2002/01/17 21:01:52 jongfoster
737 * Moving all our URL and URL pattern parsing code to urlmatch.c.
739 * Revision 1.60 2001/12/30 14:07:32 steudten
740 * - Add signal handling (unix)
741 * - Add SIGHUP handler (unix)
742 * - Add creation of pidfile (unix)
743 * - Add action 'top' in rc file (RH)
744 * - Add entry 'SIGNALS' to manpage
745 * - Add exit message to logfile (unix)
747 * Revision 1.59 2001/12/13 14:07:18 oes
748 * Fixed Bug: 503 error page now sent OK
750 * Revision 1.58 2001/11/30 23:37:24 jongfoster
751 * Renaming the Win32 config file to config.txt - this is almost the
752 * same as the corresponding UNIX name "config"
754 * Revision 1.57 2001/11/16 00:47:43 jongfoster
755 * Changing the tty-disconnection code to use setsid().
757 * Revision 1.56 2001/11/13 20:20:54 jongfoster
758 * Tabs->spaces, fixing a bug with missing {} around an if()
760 * Revision 1.55 2001/11/13 20:14:53 jongfoster
761 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
763 * Revision 1.54 2001/11/07 00:03:14 steudten
764 * Give reliable return value if an error
765 * occurs not just 0 with new daemon mode.
767 * Revision 1.53 2001/11/05 21:41:43 steudten
768 * Add changes to be a real daemon just for unix os.
769 * (change cwd to /, detach from controlling tty, set
770 * process group and session leader to the own process.
772 * Add some fatal-error log message for failed malloc().
773 * Add '-d' if compiled with 'configure --with-debug' to
774 * enable debug output.
776 * Revision 1.52 2001/10/26 20:11:20 jongfoster
777 * Fixing type mismatch
779 * Revision 1.51 2001/10/26 17:38:28 oes
782 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
783 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
784 * threads to call select() simultaneously. So, it's time to do a real, live,
785 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
786 * (native). Both versions will work, but using __OS2__ offers multi-threading.
788 * Revision 1.49 2001/10/23 21:41:35 jongfoster
789 * Added call to initialize the (statically-allocated of course)
790 * "out of memory" CGI response.
792 * Revision 1.48 2001/10/10 19:56:46 jongfoster
793 * Moving some code that wasn't cookie-related out of an #ifdef
796 * Revision 1.47 2001/10/10 16:44:36 oes
797 * Added CONNECT destination port limitation check
799 * Revision 1.46 2001/10/08 15:17:41 oes
800 * Re-enabled SSL forwarding
802 * Revision 1.45 2001/10/07 15:42:11 oes
803 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
805 * Moved downgrading of the HTTP version from parse_http_request to
806 * chat(), since we can't decide if it is necessary before we have
807 * determined the actions for the URL. The HTTP command is now
808 * *always* re-built so the repairs need no longer be special-cased.
810 * filter_popups now gets a csp pointer so it can raise the new
811 * CSP_FLAG_MODIFIED flag.
815 * Added configurable size limit for the IOB. If the IOB grows so
816 * large that the next read would exceed the limit, the header
817 * is generated, and the header & unfiltered buffer are flushed
818 * to the client. Chat then continues in non-buffering,
819 * non-filtering body mode.
821 * Revision 1.44 2001/10/02 18:13:57 oes
824 * Revision 1.43 2001/10/02 15:32:13 oes
825 * Moved generation of hdr
827 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
828 * Cleaning up 2 compiler warnings on OS/2.
830 * Revision 1.41 2001/09/16 17:05:14 jongfoster
831 * Removing unused #include showarg.h
833 * Revision 1.40 2001/09/16 15:41:45 jongfoster
834 * Fixing signed/unsigned comparison warning.
836 * Revision 1.39 2001/09/16 13:21:27 jongfoster
837 * Changes to use new list functions.
839 * Revision 1.38 2001/09/16 13:01:46 jongfoster
840 * Removing redundant function call that zeroed zalloc()'d memory.
842 * Revision 1.37 2001/09/10 11:12:24 oes
843 * Deleted unused variable
845 * Revision 1.36 2001/09/10 10:56:15 oes
846 * Silenced compiler warnings
848 * Revision 1.35 2001/07/31 14:44:22 oes
849 * Deleted unused size parameter from filter_popups()
851 * Revision 1.34 2001/07/30 22:08:36 jongfoster
852 * Tidying up #defines:
853 * - All feature #defines are now of the form FEATURE_xxx
854 * - Permanently turned off WIN_GUI_EDIT
855 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
857 * Revision 1.33 2001/07/29 19:32:00 jongfoster
858 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
860 * Revision 1.32 2001/07/29 18:47:05 jongfoster
861 * Adding missing #include "loadcfg.h"
863 * Revision 1.31 2001/07/29 12:17:48 oes
864 * Applied pthread fix by Paul Lieverse
866 * Revision 1.30 2001/07/25 22:57:13 jongfoster
867 * __BEOS__ no longer overrides FEATURE_PTHREAD.
868 * This is because FEATURE_PTHREAD will soon be widely used, so I
869 * want to keep it simple.
871 * Revision 1.29 2001/07/24 12:47:06 oes
872 * Applied BeOS support update by Eugenia
874 * Revision 1.28 2001/07/23 13:26:12 oes
875 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
877 * Revision 1.27 2001/07/19 19:09:47 haroon
878 * - Added code to take care of the situation where while processing the first
879 * server response (which includes the server header), after finding the end
880 * of the headers we were not looking past the end of the headers for
881 * content modification. I enabled it for filter_popups.
882 * Someone else should look to see if other similar operations should be
883 * done to the discarded portion of the buffer.
885 * Note 2001/07/20: No, the other content modification mechanisms will process
886 * the whole iob later anyway. --oes
888 * Revision 1.26 2001/07/18 12:31:36 oes
891 * Revision 1.25 2001/07/15 19:43:49 jongfoster
892 * Supports POSIX threads.
893 * Also removed some unused #includes.
895 * Revision 1.24 2001/07/13 14:00:40 oes
896 * - Generic content modification scheme:
897 * Each feature has its own applicability flag that is set
898 * from csp->action->flags.
899 * Replaced the "filtering" int flag , by a function pointer
900 * "content_filter" to the function that will do the content
901 * modification. If it is != NULL, the document will be buffered
902 * and processed through *content_filter, which must set
903 * csp->content_length and return a modified copy of the body
904 * or return NULL (on failiure).
905 * - Changed csp->is_text to the more generic bitmap csp->content_type
906 * which can currently take the valued CT_TEXT or CT_GIF
908 * - Removed all #ifdef PCRS
910 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
911 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
912 * the `block_acl' call. This prevents a compilation error when the user
913 * does not wish to use the "ACL" feature.
915 * Revision 1.22 2001/06/29 21:45:41 oes
916 * Indentation, CRLF->LF, Tab-> Space
918 * Revision 1.21 2001/06/29 13:29:36 oes
919 * - Cleaned up, improved comments
920 * - Unified all possible interceptors (CGI,
921 * block, trust, fast_redirect) in one
922 * place, with one (CGI) answer generation
923 * mechansim. Much clearer now.
924 * - Removed the GIF image generation, which
925 * is now done in filters.c:block_url()
926 * - Made error conditions like domain lookup
927 * failiure or (various) problems while talking
928 * to the server use cgi.c:error_response()
929 * instead of generating HTML/HTTP in chat() (yuck!)
930 * - Removed logentry from cancelled commit
932 * Revision 1.20 2001/06/09 10:55:28 jongfoster
933 * Changing BUFSIZ ==> BUFFER_SIZE
935 * Revision 1.19 2001/06/07 23:12:52 jongfoster
936 * Replacing function pointer in struct gateway with a directly
937 * called function forwarded_connect().
938 * Replacing struct gateway with struct forward_spec
940 * Revision 1.18 2001/06/03 19:12:16 oes
941 * introduced new cgi handling
943 * Revision 1.17 2001/06/01 20:07:23 jongfoster
944 * Now uses action +image-blocker{} rather than config->tinygif
946 * Revision 1.16 2001/06/01 18:49:17 jongfoster
947 * Replaced "list_share" with "list" - the tiny memory gain was not
948 * worth the extra complexity.
950 * Revision 1.15 2001/05/31 21:24:47 jongfoster
951 * Changed "permission" to "action" throughout.
952 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
953 * Moved vanilla wafer check into chat(), since we must now
954 * decide whether or not to add it based on the URL.
956 * Revision 1.14 2001/05/29 20:14:01 joergs
957 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
960 * Revision 1.13 2001/05/29 09:50:24 jongfoster
961 * Unified blocklist/imagelist/permissionslist.
962 * File format is still under discussion, but the internal changes
965 * Also modified interceptor behaviour:
966 * - We now intercept all URLs beginning with one of the following
967 * prefixes (and *only* these prefixes):
969 * * http://ijbswa.sf.net/config/
970 * * http://ijbswa.sourceforge.net/config/
971 * - New interceptors "home page" - go to http://i.j.b/ to see it.
972 * - Internal changes so that intercepted and fast redirect pages
973 * are not replaced with an image.
974 * - Interceptors now have the option to send a binary page direct
975 * to the client. (i.e. ijb-send-banner uses this)
976 * - Implemented show-url-info interceptor. (Which is why I needed
977 * the above interceptors changes - a typical URL is
978 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
979 * The previous mechanism would not have intercepted that, and
980 * if it had been intercepted then it then it would have replaced
983 * Revision 1.12 2001/05/27 22:17:04 oes
985 * - re_process_buffer no longer writes the modified buffer
986 * to the client, which was very ugly. It now returns the
987 * buffer, which it is then written by chat.
989 * - content_length now adjusts the Content-Length: header
990 * for modified documents rather than crunch()ing it.
991 * (Length info in csp->content_length, which is 0 for
992 * unmodified documents)
994 * - For this to work, sed() is called twice when filtering.
996 * Revision 1.11 2001/05/26 17:27:53 jongfoster
997 * Added support for CLF and fixed LOG_LEVEL_LOG.
998 * Also did CRLF->LF fix of my previous patch.
1000 * Revision 1.10 2001/05/26 15:26:15 jongfoster
1001 * ACL feature now provides more security by immediately dropping
1002 * connections from untrusted hosts.
1004 * Revision 1.9 2001/05/26 00:28:36 jongfoster
1005 * Automatic reloading of config file.
1006 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
1007 * Most of the global variables have been moved to a new
1008 * struct configuration_spec, accessed through csp->config->globalname
1009 * Most of the globals remaining are used by the Win32 GUI.
1011 * Revision 1.8 2001/05/25 22:43:18 jongfoster
1012 * Fixing minor memory leak and buffer overflow.
1014 * Revision 1.7 2001/05/25 22:34:30 jongfoster
1017 * Revision 1.6 2001/05/23 00:13:58 joergs
1018 * AmigaOS support fixed.
1020 * Revision 1.5 2001/05/22 18:46:04 oes
1022 * - Enabled filtering banners by size rather than URL
1023 * by adding patterns that replace all standard banner
1024 * sizes with the "Junkbuster" gif to the re_filterfile
1026 * - Enabled filtering WebBugs by providing a pattern
1027 * which kills all 1x1 images
1029 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
1030 * which is selected by the (nonstandard and therefore
1031 * capital) letter 'U' in the option string.
1032 * It causes the quantifiers to be ungreedy by default.
1033 * Appending a ? turns back to greedy (!).
1035 * - Added a new interceptor ijb-send-banner, which
1036 * sends back the "Junkbuster" gif. Without imagelist or
1037 * MSIE detection support, or if tinygif = 1, or the
1038 * URL isn't recognized as an imageurl, a lame HTML
1039 * explanation is sent instead.
1041 * - Added new feature, which permits blocking remote
1042 * script redirects and firing back a local redirect
1044 * The feature is conditionally compiled, i.e. it
1045 * can be disabled with --disable-fast-redirects,
1046 * plus it must be activated by a "fast-redirects"
1047 * line in the config file, has its own log level
1048 * and of course wants to be displayed by show-proxy-args
1049 * Note: Boy, all the #ifdefs in 1001 locations and
1050 * all the fumbling with configure.in and acconfig.h
1051 * were *way* more work than the feature itself :-(
1053 * - Because a generic redirect template was needed for
1054 * this, tinygif = 3 now uses the same.
1056 * - Moved GIFs, and other static HTTP response templates
1059 * - Some minor fixes
1061 * - Removed some >400 CRs again (Jon, you really worked
1064 * Revision 1.4 2001/05/21 19:34:01 jongfoster
1065 * Made failure to bind() a fatal error.
1067 * Revision 1.3 2001/05/20 01:21:20 jongfoster
1068 * Version 2.9.4 checkin.
1069 * - Merged popupfile and cookiefile, and added control over PCRS
1070 * filtering, in new "permissionsfile".
1071 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
1072 * file error you now get a message box (in the Win32 GUI) rather
1073 * than the program exiting with no explanation.
1074 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
1076 * - Removed tabs from "config"
1077 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
1078 * - Bumped up version number.
1080 * Revision 1.2 2001/05/17 22:34:44 oes
1081 * - Added hint on GIF char array generation to jcc.c
1082 * - Cleaned CRLF's from the sources and related files
1083 * - Repaired logging for REF and FRC
1085 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
1086 * Initial import of version 2.9.3 source tree
1089 *********************************************************************/
1095 #include <sys/types.h>
1104 # ifndef FEATURE_PTHREAD
1108 # include <windows.h>
1109 # include <process.h>
1110 # endif /* ndef FEATURE_PTHREAD */
1113 # ifndef _WIN_CONSOLE
1114 # include "w32log.h"
1115 # endif /* ndef _WIN_CONSOLE */
1116 # include "w32svrapi.h"
1118 #else /* ifndef _WIN32 */
1120 # if !defined (__OS2__)
1121 # include <unistd.h>
1122 # include <sys/wait.h>
1123 # endif /* ndef __OS2__ */
1124 # include <sys/time.h>
1125 # include <sys/stat.h>
1126 # include <sys/ioctl.h>
1129 #include <sys/termios.h>
1137 # include <signal.h>
1140 # include <socket.h> /* BeOS has select() for sockets only. */
1141 # include <OS.h> /* declarations for threads and stuff. */
1144 # if defined(__EMX__) || defined(__OS2__)
1145 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
1150 #define bzero(B,N) memset(B,0x00,n)
1154 # include <select.h>
1159 #include "project.h"
1162 #include "filters.h"
1163 #include "loaders.h"
1164 #include "parsers.h"
1165 #include "miscutil.h"
1167 #include "jbsockets.h"
1168 #include "gateway.h"
1169 #include "actions.h"
1171 #include "loadcfg.h"
1172 #include "urlmatch.h"
1174 const char jcc_h_rcs[] = JCC_H_VERSION;
1175 const char project_h_rcs[] = PROJECT_H_VERSION;
1178 struct client_state clients[1];
1179 struct file_list files[1];
1181 #ifdef FEATURE_STATISTICS
1182 int urls_read = 0; /* total nr of urls read inc rejected */
1183 int urls_rejected = 0; /* total nr of urls rejected */
1184 #endif /* def FEATURE_STATISTICS */
1186 #ifdef FEATURE_GRACEFUL_TERMINATION
1187 int g_terminate = 0;
1190 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1191 static void sig_handler(int the_signal);
1193 static int client_protocol_is_unsupported(const struct client_state *csp, char *req);
1194 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
1195 static jb_err get_server_headers(struct client_state *csp);
1196 static const char *crunch_reason(const struct http_response *rsp);
1197 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp);
1199 * static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len);
1201 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
1202 static jb_err change_request_destination(struct client_state *csp);
1203 static void chat(struct client_state *csp);
1204 static void serve(struct client_state *csp);
1205 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1206 static void usage(const char *myname);
1208 static void initialize_mutexes(void);
1209 static jb_socket bind_port_helper(struct configuration_spec *config);
1210 static void listen_loop(void);
1213 void serve(struct client_state *csp);
1214 #else /* ifndef AMIGA */
1215 static void serve(struct client_state *csp);
1216 #endif /* def AMIGA */
1219 static int32 server_thread(void *data);
1220 #endif /* def __BEOS__ */
1223 #define sleep(N) Sleep(((N) * 1000))
1227 #define sleep(N) DosSleep(((N) * 100))
1230 #ifdef MUTEX_LOCKS_AVAILABLE
1232 * XXX: Does the locking stuff really belong in this file?
1234 privoxy_mutex_t log_mutex;
1235 privoxy_mutex_t log_init_mutex;
1236 privoxy_mutex_t connection_reuse_mutex;
1238 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
1239 privoxy_mutex_t resolver_mutex;
1240 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
1242 #ifndef HAVE_GMTIME_R
1243 privoxy_mutex_t gmtime_mutex;
1244 #endif /* ndef HAVE_GMTIME_R */
1246 #ifndef HAVE_LOCALTIME_R
1247 privoxy_mutex_t localtime_mutex;
1248 #endif /* ndef HAVE_GMTIME_R */
1251 privoxy_mutex_t rand_mutex;
1252 #endif /* ndef HAVE_RANDOM */
1254 #endif /* def MUTEX_LOCKS_AVAILABLE */
1257 const char *basedir = NULL;
1258 const char *pidfile = NULL;
1259 static int received_hup_signal = 0;
1260 #endif /* defined unix */
1262 /* HTTP snipplets. */
1263 static const char CSUCCEED[] =
1264 "HTTP/1.0 200 Connection established\r\n"
1265 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
1267 static const char CHEADER[] =
1268 "HTTP/1.0 400 Invalid header received from client\r\n"
1269 "Proxy-Agent: Privoxy " VERSION "\r\n"
1270 "Content-Type: text/plain\r\n"
1271 "Connection: close\r\n\r\n"
1272 "Invalid header received from client.\r\n";
1274 static const char FTP_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 FTP.\r\n";
1280 static const char GOPHER_RESPONSE[] =
1281 "HTTP/1.0 400 Invalid request received from client\r\n"
1282 "Content-Type: text/plain\r\n"
1283 "Connection: close\r\n\r\n"
1284 "Invalid request. Privoxy doesn't support gopher.\r\n";
1286 /* XXX: should be a template */
1287 static const char MISSING_DESTINATION_RESPONSE[] =
1288 "HTTP/1.0 400 Bad request received from client\r\n"
1289 "Proxy-Agent: Privoxy " VERSION "\r\n"
1290 "Content-Type: text/plain\r\n"
1291 "Connection: close\r\n\r\n"
1292 "Bad request. Privoxy was unable to extract the destination.\r\n";
1294 /* XXX: should be a template */
1295 static const char NO_SERVER_DATA_RESPONSE[] =
1296 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1297 "Proxy-Agent: Privoxy " VERSION "\r\n"
1298 "Content-Type: text/plain\r\n"
1299 "Connection: close\r\n\r\n"
1300 "Empty server or forwarder response.\r\n"
1301 "The connection has been closed but Privoxy didn't receive any data.\r\n";
1303 /* XXX: should be a template */
1304 static const char INVALID_SERVER_HEADERS_RESPONSE[] =
1305 "HTTP/1.0 502 Server or forwarder response invalid\r\n"
1306 "Proxy-Agent: Privoxy " VERSION "\r\n"
1307 "Content-Type: text/plain\r\n"
1308 "Connection: close\r\n\r\n"
1309 "Bad response. The server or forwarder response doesn't look like HTTP.\r\n";
1312 /* XXX: should be a template */
1313 static const char NULL_BYTE_RESPONSE[] =
1314 "HTTP/1.0 400 Bad request received from client\r\n"
1315 "Proxy-Agent: Privoxy " VERSION "\r\n"
1316 "Content-Type: text/plain\r\n"
1317 "Connection: close\r\n\r\n"
1318 "Bad request. Null byte(s) before end of request.\r\n";
1321 /* XXX: should be a template */
1322 static const char MESSED_UP_REQUEST_RESPONSE[] =
1323 "HTTP/1.0 400 Malformed request after rewriting\r\n"
1324 "Proxy-Agent: Privoxy " VERSION "\r\n"
1325 "Content-Type: text/plain\r\n"
1326 "Connection: close\r\n\r\n"
1327 "Bad request. Messed up with header filters.\r\n";
1329 /* A function to crunch a response */
1330 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
1332 /* Crunch function flags */
1333 #define CF_NO_FLAGS 0
1334 /* Cruncher applies to forced requests as well */
1335 #define CF_IGNORE_FORCE 1
1336 /* Crunched requests are counted for the block statistics */
1337 #define CF_COUNT_AS_REJECT 2
1339 /* A crunch function and its flags */
1342 const crunch_func_ptr cruncher;
1346 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
1348 /* Complete list of cruncher functions */
1349 static const struct cruncher crunchers_all[] = {
1350 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
1351 { block_url, CF_COUNT_AS_REJECT },
1352 #ifdef FEATURE_TRUST
1353 { trust_url, CF_COUNT_AS_REJECT },
1354 #endif /* def FEATURE_TRUST */
1355 { redirect_url, CF_NO_FLAGS },
1356 { dispatch_cgi, CF_IGNORE_FORCE},
1360 /* Light version, used after tags are applied */
1361 static const struct cruncher crunchers_light[] = {
1362 { block_url, CF_COUNT_AS_REJECT },
1363 { redirect_url, CF_NO_FLAGS },
1369 * XXX: Don't we really mean
1375 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1376 /*********************************************************************
1378 * Function : sig_handler
1380 * Description : Signal handler for different signals.
1381 * Exit gracefully on TERM and INT
1382 * or set a flag that will cause the errlog
1383 * to be reopened by the main thread on HUP.
1386 * 1 : the_signal = the signal cause this function to call
1390 *********************************************************************/
1391 static void sig_handler(int the_signal)
1397 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1409 received_hup_signal = 1;
1415 * We shouldn't be here, unless we catch signals
1416 * in main() that we can't handle here!
1418 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1426 /*********************************************************************
1428 * Function : client_protocol_is_unsupported
1430 * Description : Checks if the client used a known unsupported
1431 * protocol and deals with it by sending an error
1435 * 1 : csp = Current client state (buffers, headers, etc...)
1436 * 2 : req = the first request line send by the client
1438 * Returns : TRUE if an error response has been generated, or
1439 * FALSE if the request doesn't look invalid.
1441 *********************************************************************/
1442 static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1445 * If it's a FTP or gopher request, we don't support it.
1447 * These checks are better than nothing, but they might
1448 * not work in all configurations and some clients might
1449 * have problems digesting the answer.
1451 * They should, however, never cause more problems than
1452 * Privoxy's old behaviour (returning the misleading HTML
1455 * "Could not resolve http://(ftp|gopher)://example.org").
1457 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1459 const char *response = NULL;
1460 const char *protocol = NULL;
1462 if (!strncmpic(req, "GET ftp://", 10))
1464 response = FTP_RESPONSE;
1469 response = GOPHER_RESPONSE;
1470 protocol = "GOPHER";
1472 log_error(LOG_LEVEL_ERROR,
1473 "%s tried to use Privoxy as %s proxy: %s",
1474 csp->ip_addr_str, protocol, req);
1475 log_error(LOG_LEVEL_CLF,
1476 "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1478 write_socket(csp->cfd, response, strlen(response));
1487 /*********************************************************************
1489 * Function : get_request_destination_elsewhere
1491 * Description : If the client's request was redirected into
1492 * Privoxy without the client's knowledge,
1493 * the request line lacks the destination host.
1495 * This function tries to get it elsewhere,
1496 * provided accept-intercepted-requests is enabled.
1498 * "Elsewhere" currently only means "Host: header",
1499 * but in the future we may ask the redirecting
1500 * packet filter to look the destination up.
1502 * If the destination stays unknown, an error
1503 * response is send to the client and headers
1504 * are freed so that chat() can return directly.
1507 * 1 : csp = Current client state (buffers, headers, etc...)
1508 * 2 : headers = a header list
1510 * Returns : JB_ERR_OK if the destination is now known, or
1511 * JB_ERR_PARSE if it isn't.
1513 *********************************************************************/
1514 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1518 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1520 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1521 " Privoxy isn't configured to accept intercepted requests.",
1522 csp->ip_addr_str, csp->http->cmd);
1523 /* XXX: Use correct size */
1524 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1525 csp->ip_addr_str, csp->http->cmd);
1527 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1528 destroy_list(headers);
1530 return JB_ERR_PARSE;
1532 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1534 /* Split the domain we just got for pattern matching */
1535 init_domain_components(csp->http);
1541 /* We can't work without destination. Go spread the news.*/
1543 req = list_to_text(headers);
1545 /* XXX: Use correct size */
1546 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1547 csp->ip_addr_str, csp->http->cmd);
1548 log_error(LOG_LEVEL_ERROR,
1549 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1550 csp->ip_addr_str, csp->http->cmd, req);
1553 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
1554 destroy_list(headers);
1556 return JB_ERR_PARSE;
1559 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1560 * to get the destination IP address, use it as host directly
1561 * or do a reverse DNS lookup first.
1566 /*********************************************************************
1568 * Function : get_server_headers
1570 * Description : Parses server headers in iob and fills them
1571 * into csp->headers so that they can later be
1575 * 1 : csp = Current client state (buffers, headers, etc...)
1577 * Returns : JB_ERR_OK if everything went fine, or
1578 * JB_ERR_PARSE if the headers were incomplete.
1580 *********************************************************************/
1581 static jb_err get_server_headers(struct client_state *csp)
1583 int continue_hack_in_da_house = 0;
1586 while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
1591 * continue hack in da house. Ignore the ending of
1592 * this head and continue enlisting header lines.
1593 * The reason is described below.
1595 enlist(csp->headers, "");
1596 continue_hack_in_da_house = 0;
1599 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1602 * It's a bodyless continue response, don't
1603 * stop header parsing after reaching its end.
1605 * As a result Privoxy will concatenate the
1606 * next response's head and parse and deliver
1607 * the headers as if they belonged to one request.
1609 * The client will separate them because of the
1610 * empty line between them.
1612 * XXX: What we're doing here is clearly against
1613 * the intended purpose of the continue header,
1614 * and under some conditions (HTTP/1.0 client request)
1615 * it's a standard violation.
1617 * Anyway, "sort of against the spec" is preferable
1618 * to "always getting confused by Continue responses"
1619 * (Privoxy's behaviour before this hack was added)
1621 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1622 continue_hack_in_da_house = 1;
1624 else if (*header == '\0')
1627 * If the header is empty, but the Continue hack
1628 * isn't active, we can assume that we reached the
1629 * end of the buffer before we hit the end of the
1632 * Inform the caller an let it decide how to handle it.
1634 return JB_ERR_PARSE;
1637 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1640 * XXX: Should we quit the request and return a
1641 * out of memory error page instead?
1643 log_error(LOG_LEVEL_ERROR,
1644 "Out of memory while enlisting server headers. %s lost.",
1654 /*********************************************************************
1656 * Function : crunch_reason
1658 * Description : Translates the crunch reason code into a string.
1661 * 1 : rsp = a http_response
1663 * Returns : A string with the crunch reason or an error description.
1665 *********************************************************************/
1666 static const char *crunch_reason(const struct http_response *rsp)
1668 char * reason = NULL;
1670 assert(rsp != NULL);
1673 return "Internal error while searching for crunch reason";
1676 switch (rsp->reason)
1678 case RSP_REASON_UNSUPPORTED:
1679 reason = "Unsupported HTTP feature";
1681 case RSP_REASON_BLOCKED:
1684 case RSP_REASON_UNTRUSTED:
1685 reason = "Untrusted";
1687 case RSP_REASON_REDIRECTED:
1688 reason = "Redirected";
1690 case RSP_REASON_CGI_CALL:
1691 reason = "CGI Call";
1693 case RSP_REASON_NO_SUCH_DOMAIN:
1694 reason = "DNS failure";
1696 case RSP_REASON_FORWARDING_FAILED:
1697 reason = "Forwarding failed";
1699 case RSP_REASON_CONNECT_FAILED:
1700 reason = "Connection failure";
1702 case RSP_REASON_OUT_OF_MEMORY:
1703 reason = "Out of memory (may mask other reasons)";
1706 reason = "No reason recorded";
1714 /*********************************************************************
1716 * Function : send_crunch_response
1718 * Description : Delivers already prepared response for
1719 * intercepted requests, logs the interception
1720 * and frees the response.
1723 * 1 : csp = Current client state (buffers, headers, etc...)
1724 * 1 : rsp = Fully prepared response. Will be freed on exit.
1726 * Returns : Nothing.
1728 *********************************************************************/
1729 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp)
1731 const struct http_request *http = csp->http;
1732 char status_code[4];
1734 assert(rsp != NULL);
1735 assert(rsp->head != NULL);
1740 * Not supposed to happen. If it does
1741 * anyway, treat it as an unknown error.
1743 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1744 /* return code doesn't matter */
1749 /* If rsp is still NULL, we have serious internal problems. */
1750 log_error(LOG_LEVEL_FATAL,
1751 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1755 * Extract the status code from the actual head
1756 * that was send to the client. It is the only
1757 * way to get it right for all requests, including
1758 * the fixed ones for out-of-memory problems.
1760 * A head starts like this: 'HTTP/1.1 200...'
1764 status_code[0] = rsp->head[9];
1765 status_code[1] = rsp->head[10];
1766 status_code[2] = rsp->head[11];
1767 status_code[3] = '\0';
1769 /* Write the answer to the client */
1770 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1771 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1773 /* There is nothing we can do about it. */
1774 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1777 /* Log that the request was crunched and why. */
1778 log_error(LOG_LEVEL_GPC, "%s%s crunch! (%s)",
1779 http->hostport, http->path, crunch_reason(rsp));
1780 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %d",
1781 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1783 /* Clean up and return */
1784 if (cgi_error_memory() != rsp)
1786 free_http_response(rsp);
1793 /*********************************************************************
1795 * Function : request_contains_null_bytes
1797 * Description : Checks for NULL bytes in the request and sends
1798 * an error message to the client if any were found.
1800 * XXX: currently not used, see comment in chat().
1803 * 1 : csp = Current client state (buffers, headers, etc...)
1804 * 2 : buf = Data from the client's request to check.
1805 * 3 : len = The data length.
1807 * Returns : TRUE if the request contained one or more NULL bytes, or
1810 *********************************************************************/
1811 static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1813 size_t c_len; /* Request lenght when treated as C string */
1815 c_len = strlen(buf);
1820 * Null byte(s) found. Log the request,
1821 * return an error response and hang up.
1823 size_t tmp_len = c_len;
1828 * Replace NULL byte(s) with '°' characters
1829 * so the request can be logged as string.
1830 * XXX: Is there a better replacement character?
1833 tmp_len += strlen(buf+tmp_len);
1834 } while (tmp_len < len);
1836 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1837 "(length=%d, strlen=%d).", csp->ip_addr_str, len, c_len);
1838 log_error(LOG_LEVEL_HEADER,
1839 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1841 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
1843 /* XXX: Log correct size */
1844 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1854 /*********************************************************************
1856 * Function : crunch_response_triggered
1858 * Description : Checks if the request has to be crunched,
1859 * and delivers the crunch response if necessary.
1862 * 1 : csp = Current client state (buffers, headers, etc...)
1863 * 2 : crunchers = list of cruncher functions to run
1865 * Returns : TRUE if the request was answered with a crunch response
1868 *********************************************************************/
1869 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
1871 struct http_response *rsp = NULL;
1872 const struct cruncher *c;
1875 * If CGI request crunching is disabled,
1876 * check the CGI dispatcher out of order to
1877 * prevent unintentional blocks or redirects.
1879 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
1880 && (NULL != (rsp = dispatch_cgi(csp))))
1882 /* Deliver, log and free the interception response. */
1883 send_crunch_response(csp, rsp);
1887 for (c = crunchers; c->cruncher != NULL; c++)
1890 * Check the cruncher if either Privoxy is toggled
1891 * on and the request isn't forced, or if the cruncher
1892 * applies to forced requests as well.
1894 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
1895 !(csp->flags & CSP_FLAG_FORCED)) ||
1896 (c->flags & CF_IGNORE_FORCE))
1898 rsp = c->cruncher(csp);
1901 /* Deliver, log and free the interception response. */
1902 send_crunch_response(csp, rsp);
1903 #ifdef FEATURE_STATISTICS
1904 if (c->flags & CF_COUNT_AS_REJECT)
1906 csp->flags |= CSP_FLAG_REJECTED;
1908 #endif /* def FEATURE_STATISTICS */
1919 /*********************************************************************
1921 * Function : build_request_line
1923 * Description : Builds the HTTP request line.
1925 * If a HTTP forwarder is used it expects the whole URL,
1926 * web servers only get the path.
1929 * 1 : csp = Current client state (buffers, headers, etc...)
1930 * 2 : fwd = The forwarding spec used for the request
1931 * XXX: Should use http->fwd instead.
1932 * 3 : request_line = The old request line which will be replaced.
1934 * Returns : Nothing. Terminates in case of memory problems.
1936 *********************************************************************/
1937 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
1939 struct http_request *http = csp->http;
1941 assert(http->ssl == 0);
1944 * Downgrade http version from 1.1 to 1.0
1945 * if +downgrade action applies.
1947 if ( (csp->action->flags & ACTION_DOWNGRADE)
1948 && (!strcmpic(http->ver, "HTTP/1.1")))
1951 http->ver = strdup("HTTP/1.0");
1953 if (http->ver == NULL)
1955 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1960 * Rebuild the request line.
1962 freez(*request_line);
1963 *request_line = strdup(http->gpc);
1964 string_append(request_line, " ");
1966 if (fwd->forward_host)
1968 string_append(request_line, http->url);
1972 string_append(request_line, http->path);
1974 string_append(request_line, " ");
1975 string_append(request_line, http->ver);
1977 if (*request_line == NULL)
1979 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1981 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
1985 /*********************************************************************
1987 * Function : change_request_destination
1989 * Description : Parse a (rewritten) request line and regenerate
1990 * the http request data.
1993 * 1 : csp = Current client state (buffers, headers, etc...)
1995 * Returns : Forwards the parse_http_request() return code.
1996 * Terminates in case of memory problems.
1998 *********************************************************************/
1999 static jb_err change_request_destination(struct client_state *csp)
2001 struct http_request *http = csp->http;
2004 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
2005 free_http_request(http);
2006 err = parse_http_request(csp->headers->first->str, http, csp);
2007 if (JB_ERR_OK != err)
2009 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
2010 jb_err_to_string(err));
2014 /* XXX: ocmd is a misleading name */
2015 http->ocmd = strdup(http->cmd);
2016 if (http->ocmd == NULL)
2018 log_error(LOG_LEVEL_FATAL,
2019 "Out of memory copying rewritten HTTP request line");
2027 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2028 /*********************************************************************
2030 * Function : server_response_is_complete
2032 * Description : Determines whether we should stop reading
2033 * from the server socket.
2036 * 1 : csp = Current client state (buffers, headers, etc...)
2037 * 2 : content_length = Length of content received so far.
2039 * Returns : TRUE if the response is complete,
2042 *********************************************************************/
2043 static int server_response_is_complete(struct client_state *csp, size_t content_length)
2045 int content_length_known = (csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
2047 if (!strcmpic(csp->http->gpc, "HEAD"))
2050 * "HEAD" implies no body, we are thus expecting
2051 * no content. XXX: incomplete "list" of methods?
2053 csp->expected_content_length = 0;
2054 content_length_known = TRUE;
2057 if (csp->http->status == 304)
2060 * Expect no body. XXX: incomplete "list" of status codes?
2062 csp->expected_content_length = 0;
2063 content_length_known = TRUE;
2066 return (content_length_known && ((0 == csp->expected_content_length)
2067 || (csp->expected_content_length <= content_length)));
2069 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2071 /*********************************************************************
2073 * Function : mark_server_socket_tainted
2075 * Description : Makes sure we don't reuse a server socket
2076 * (if we didn't read everything the server sent
2077 * us reusing the socket would lead to garbage).
2080 * 1 : csp = Current client state (buffers, headers, etc...)
2084 *********************************************************************/
2085 static void mark_server_socket_tainted(struct client_state *csp)
2087 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
2089 log_error(LOG_LEVEL_CONNECT, "Unsetting keep-alive flag.");
2090 csp->flags &= ~CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE;
2094 /*********************************************************************
2098 * Description : Once a connection to the client has been accepted,
2099 * this function is called (via serve()) to handle the
2100 * main business of the communication. When this
2101 * function returns, the caller must close the client
2104 * FIXME: chat is nearly thousand lines long.
2108 * 1 : csp = Current client state (buffers, headers, etc...)
2110 * Returns : Nothing.
2112 *********************************************************************/
2113 static void chat(struct client_state *csp)
2115 char buf[BUFFER_SIZE];
2123 int ms_iis5_hack = 0;
2124 size_t byte_count = 0;
2125 int forwarded_connect_retries = 0;
2126 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
2127 const struct forward_spec * fwd;
2128 struct http_request *http;
2129 int len; /* for buffer sizes (and negative error codes) */
2132 /* Function that does the content filtering for the current request */
2133 filter_function_ptr content_filter = NULL;
2135 /* Skeleton for HTTP response, if we should intercept the request */
2136 struct http_response *rsp;
2138 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
2139 struct list header_list;
2140 struct list *headers = &header_list;
2144 memset(buf, 0, sizeof(buf));
2147 * Read the client's request. Note that since we're not using select() we
2148 * could get blocked here if a client connected, then didn't say anything!
2153 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2155 if (len <= 0) break; /* error! */
2158 * If there is no memory left for buffering the
2159 * request, there is nothing we can do but hang up
2161 if (add_to_iob(csp, buf, len))
2166 req = get_header(csp->iob);
2168 } while ((NULL != req) && ('\0' == *req));
2170 if ((NULL != req) && ('\0' != *req))
2172 /* Request received. Validate and parse it. */
2176 * XXX: Temporary disabled to prevent problems
2177 * with POST requests whose bodies are allowed to
2178 * contain NULL bytes. BR#1730105.
2180 * The main purpose of this check is to properly
2181 * log stuff like BitTorrent traffic and other junk
2182 * that hits public proxies. It's not required for
2183 * Privoxy to functions as those requests are discarded
2186 * It probably should be rewritten to only check
2187 * the head of the request. Another option would
2188 * be to let all POST requests pass, although that
2189 * may not be good enough.
2191 if (request_contains_null_bytes(csp, buf, len))
2193 /* NULL bytes found and dealt with, just hang up. */
2198 /* Does the request line look invalid? */
2199 if (client_protocol_is_unsupported(csp, req))
2202 * Yes. The request has already been
2203 * answered with a error response, the buffers
2204 * were freed and we're done with chatting.
2209 #ifdef FEATURE_FORCE_LOAD
2211 * If this request contains the FORCE_PREFIX and blocks
2212 * aren't enforced, get rid of it and set the force flag.
2214 if (strstr(req, FORCE_PREFIX))
2216 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
2218 log_error(LOG_LEVEL_FORCE,
2219 "Ignored force prefix in request: \"%s\".", req);
2223 strclean(req, FORCE_PREFIX);
2224 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
2225 csp->flags |= CSP_FLAG_FORCED;
2229 #endif /* def FEATURE_FORCE_LOAD */
2230 err = parse_http_request(req, http, csp);
2231 if (JB_ERR_OK != err)
2233 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", jb_err_to_string(err));
2239 if (http->cmd == NULL)
2241 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
2242 /* XXX: Use correct size */
2243 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2244 log_error(LOG_LEVEL_ERROR, "Invalid header received from %s.", csp->ip_addr_str);
2246 free_http_request(http);
2250 /* grab the rest of the client's headers */
2254 p = get_header(csp->iob);
2258 /* There are no additional headers to read. */
2265 * We didn't receive a complete header
2266 * line yet, get the rest of it.
2268 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2271 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
2272 destroy_list(headers);
2276 if (add_to_iob(csp, buf, len))
2279 * If there is no memory left for buffering the
2280 * request, there is nothing we can do but hang up
2282 destroy_list(headers);
2289 * We were able to read a complete
2290 * header and can finaly enlist it.
2297 if (http->host == NULL)
2300 * If we still don't know the request destination,
2301 * the request is invalid or the client uses
2302 * Privoxy without its knowledge.
2304 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
2307 * Our attempts to get the request destination
2308 * elsewhere failed or Privoxy is configured
2309 * to only accept proxy requests.
2311 * An error response has already been send
2312 * and we're done here.
2319 * Determine the actions for this URL
2321 #ifdef FEATURE_TOGGLE
2322 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
2324 /* Most compatible set of actions (i.e. none) */
2325 init_current_action(csp->action);
2328 #endif /* ndef FEATURE_TOGGLE */
2330 get_url_actions(csp, http);
2334 * Save a copy of the original request for logging
2336 http->ocmd = strdup(http->cmd);
2338 if (http->ocmd == NULL)
2340 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
2343 enlist(csp->headers, http->cmd);
2345 /* Append the previously read headers */
2346 list_append_list_unique(csp->headers, headers);
2347 destroy_list(headers);
2349 err = sed(csp, FILTER_CLIENT_HEADERS);
2350 if (JB_ERR_OK != err)
2352 assert(err == JB_ERR_PARSE);
2353 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers");
2355 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2357 /* Check request line for rewrites. */
2358 if ((NULL == csp->headers->first->str)
2359 || (strcmp(http->cmd, csp->headers->first->str) &&
2360 (JB_ERR_OK != change_request_destination(csp))))
2363 * A header filter broke the request line - bail out.
2365 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
2366 /* XXX: Use correct size */
2367 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
2368 log_error(LOG_LEVEL_ERROR, "Invalid request line after applying header filters.");
2370 free_http_request(http);
2374 /* decide how to route the HTTP request */
2375 fwd = forward_url(csp, http);
2378 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
2379 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2383 * build the http request to send to the server
2384 * we have to do one of the following:
2386 * create = use the original HTTP request to create a new
2387 * HTTP request that has either the path component
2388 * without the http://domainspec (w/path) or the
2389 * full orininal URL (w/url)
2390 * Note that the path and/or the HTTP version may
2391 * have been altered by now.
2393 * connect = Open a socket to the host:port of the server
2394 * and short-circuit server and client socket.
2396 * pass = Pass the request unchanged if forwarding a CONNECT
2397 * request to a parent proxy. Note that we'll be sending
2398 * the CFAIL message ourselves if connecting to the parent
2399 * fails, but we won't send a CSUCCEED message if it works,
2400 * since that would result in a double message (ours and the
2401 * parent's). After sending the request to the parent, we simply
2404 * here's the matrix:
2407 * +--------+--------+
2409 * 0 | create | connect|
2411 * Forwarding +--------+--------+
2413 * 1 | create | pass |
2415 * +--------+--------+
2419 if (http->ssl && connect_port_is_forbidden(csp))
2421 const char *acceptable_connect_ports =
2422 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
2423 assert(NULL != acceptable_connect_ports);
2424 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
2425 "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
2426 csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
2427 csp->action->flags |= ACTION_BLOCK;
2433 freez(csp->headers->first->str);
2434 build_request_line(csp, fwd, &csp->headers->first->str);
2437 hdr = list_to_text(csp->headers);
2440 /* FIXME Should handle error properly */
2441 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2445 * We have a request. Check if one of the crunchers wants it.
2447 if (crunch_response_triggered(csp, crunchers_all))
2450 * Yes. The client got the crunch response
2451 * and we are done here after cleaning up.
2454 list_remove_all(csp->headers);
2460 * The headers can't be removed earlier because
2461 * they were still needed for the referrer check
2462 * in case of CGI crunches.
2464 * XXX: Would it be worth to move the referrer check
2465 * into client_referrer() and set a flag if it's trusted?
2467 list_remove_all(csp->headers);
2469 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2471 if (fwd->forward_host)
2473 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2474 fwd->forward_host, fwd->forward_port, http->hostport);
2478 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2481 /* here we connect to the server, gateway, or the forwarder */
2483 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
2484 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2486 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
2487 forwarded_connect_retries, http->hostport);
2490 if (csp->sfd == JB_INVALID_SOCKET)
2492 if (fwd->type != SOCKS_NONE)
2495 rsp = error_response(csp, "forwarding-failed", errno);
2497 else if (errno == EINVAL)
2499 rsp = error_response(csp, "no-such-domain", errno);
2503 rsp = error_response(csp, "connect-failed", errno);
2504 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2508 /* Write the answer to the client */
2511 send_crunch_response(csp, rsp);
2518 if (fwd->forward_host || (http->ssl == 0))
2521 * Write the client's (modified) header to the server
2522 * (along with anything else that may be in the buffer)
2524 if (write_socket(csp->sfd, hdr, strlen(hdr))
2525 || (flush_socket(csp->sfd, csp->iob) < 0))
2527 log_error(LOG_LEVEL_CONNECT,
2528 "write header to: %s failed: %E", http->hostport);
2530 rsp = error_response(csp, "connect-failed", errno);
2533 send_crunch_response(csp, rsp);
2543 * We're running an SSL tunnel and we're not forwarding,
2544 * so just send the "connect succeeded" message to the
2545 * client, flush the rest, and get out of the way.
2547 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
2555 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2557 /* we're finished with the client's header */
2560 maxfd = (csp->cfd > csp->sfd) ? csp->cfd : csp->sfd;
2562 /* pass data between the client and server
2563 * until one or the other shuts down the connection.
2572 * FD_ZERO here seems to point to an errant macro which crashes.
2573 * So do this by hand for now...
2575 memset(&rfds,0x00,sizeof(fd_set));
2579 FD_SET(csp->cfd, &rfds);
2580 FD_SET(csp->sfd, &rfds);
2582 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2583 if (server_body && server_response_is_complete(csp, byte_count))
2585 log_error(LOG_LEVEL_CONNECT,
2586 "Done reading from server. Expected content length: %d. "
2587 "Actual content length: %d. Most recently received: %d.",
2588 csp->expected_content_length, byte_count, len);
2591 * XXX: should not jump around,
2592 * chat() is complicated enough already.
2596 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2598 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
2602 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2603 mark_server_socket_tainted(csp);
2608 * This is the body of the browser's request,
2609 * just read and write it.
2611 if (FD_ISSET(csp->cfd, &rfds))
2613 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2617 /* XXX: not sure if this is necessary. */
2618 mark_server_socket_tainted(csp);
2619 break; /* "game over, man" */
2622 if (write_socket(csp->sfd, buf, (size_t)len))
2624 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2625 mark_server_socket_tainted(csp);
2632 * The server wants to talk. It could be the header or the body.
2633 * If `hdr' is null, then it's the header otherwise it's the body.
2634 * FIXME: Does `hdr' really mean `host'? No.
2636 if (FD_ISSET(csp->sfd, &rfds))
2639 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2643 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2645 if (http->ssl && (fwd->forward_host == NULL))
2648 * Just hang up. We already confirmed the client's CONNECT
2649 * request with status code 200 and unencrypted content is
2650 * no longer welcome.
2652 log_error(LOG_LEVEL_ERROR,
2653 "CONNECT already confirmed. Unable to tell the client about the problem.");
2656 else if (byte_count)
2659 * Just hang up. We already transmitted the original headers
2660 * and parts of the original content and therefore missed the
2661 * chance to send an error message (without risking data corruption).
2663 * XXX: we could retry with a fancy range request here.
2665 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2666 "Unable to tell the client about the problem.");
2667 mark_server_socket_tainted(csp);
2671 rsp = error_response(csp, "connect-failed", errno);
2674 send_crunch_response(csp, rsp);
2680 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2681 if (csp->flags & CSP_FLAG_CHUNKED)
2683 if ((len > 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2685 /* XXX: this is a temporary hack */
2686 log_error(LOG_LEVEL_CONNECT,
2687 "Looks like we reached the end of the last chunk. "
2688 "We better stop reading.");
2689 csp->expected_content_length = byte_count + (size_t)len;
2690 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2694 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2697 * Add a trailing zero to let be able to use string operations.
2698 * XXX: do we still need this with filter_popups gone?
2703 * Normally, this would indicate that we've read
2704 * as much as the server has sent us and we can
2705 * close the client connection. However, Microsoft
2706 * in its wisdom has released IIS/5 with a bug that
2707 * prevents it from sending the trailing \r\n in
2708 * a 302 redirect header (and possibly other headers).
2709 * To work around this if we've haven't parsed
2710 * a full header we'll append a trailing \r\n
2711 * and see if this now generates a valid one.
2713 * This hack shouldn't have any impacts. If we've
2714 * already transmitted the header or if this is a
2715 * SSL connection, then we won't bother with this
2716 * hack. So we only work on partially received
2717 * headers. If we append a \r\n and this still
2718 * doesn't generate a valid header, then we won't
2719 * transmit anything to the client.
2724 if (server_body || http->ssl)
2727 * If we have been buffering up the document,
2728 * now is the time to apply content modification
2729 * and send the result to the client.
2733 p = execute_content_filter(csp, content_filter);
2735 * If the content filter fails, use the original
2736 * buffer and length.
2737 * (see p != NULL ? p : csp->iob->cur below)
2741 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2744 if (JB_ERR_OK != update_server_headers(csp))
2746 log_error(LOG_LEVEL_FATAL,
2747 "Failed to update server headers. after filtering.");
2750 hdr = list_to_text(csp->headers);
2753 /* FIXME Should handle error properly */
2754 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2757 if (write_socket(csp->cfd, hdr, strlen(hdr))
2758 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
2760 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2763 mark_server_socket_tainted(csp);
2771 break; /* "game over, man" */
2775 * This is NOT the body, so
2776 * Let's pretend the server just sent us a blank line.
2778 snprintf(buf, sizeof(buf), "\r\n");
2779 len = (int)strlen(buf);
2782 * Now, let the normal header parsing algorithm below do its
2783 * job. If it fails, we'll exit instead of continuing.
2790 * If this is an SSL connection or we're in the body
2791 * of the server document, just write it to the client,
2792 * unless we need to buffer the body for later content-filtering
2794 if (server_body || http->ssl)
2799 * If there is no memory left for buffering the content, or the buffer limit
2800 * has been reached, switch to non-filtering mode, i.e. make & write the
2801 * header, flush the iob and buf, and get out of the way.
2803 if (add_to_iob(csp, buf, len))
2808 log_error(LOG_LEVEL_INFO,
2809 "Flushing header and buffers. Stepping back from filtering.");
2811 hdr = list_to_text(csp->headers);
2815 * Memory is too tight to even generate the header.
2816 * Send our static "Out-of-memory" page.
2818 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2819 rsp = cgi_error_memory();
2820 send_crunch_response(csp, rsp);
2821 mark_server_socket_tainted(csp);
2824 hdrlen = strlen(hdr);
2826 if (write_socket(csp->cfd, hdr, hdrlen)
2827 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
2828 || (write_socket(csp->cfd, buf, (size_t)len)))
2830 log_error(LOG_LEVEL_CONNECT,
2831 "Flush header and buffers to client failed: %E");
2833 mark_server_socket_tainted(csp);
2838 * Reset the byte_count to the amount of bytes
2839 * we just flushed. len will be added a few lines below,
2840 * hdrlen doesn't matter for LOG_LEVEL_CLF.
2842 byte_count = (size_t)flushed;
2844 content_filter = NULL;
2850 if (write_socket(csp->cfd, buf, (size_t)len))
2852 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2853 mark_server_socket_tainted(csp);
2857 byte_count += (size_t)len;
2862 const char *header_start;
2864 * We're still looking for the end of the server's header.
2865 * Buffer up the data we just read. If that fails, there's
2866 * little we can do but send our static out-of-memory page.
2868 if (add_to_iob(csp, buf, len))
2870 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2871 rsp = cgi_error_memory();
2872 send_crunch_response(csp, rsp);
2873 mark_server_socket_tainted(csp);
2877 header_start = csp->iob->cur;
2879 /* Convert iob into something sed() can digest */
2880 if (JB_ERR_PARSE == get_server_headers(csp))
2885 * Well, we tried our MS IIS/5 hack and it didn't work.
2886 * The header is incomplete and there isn't anything
2887 * we can do about it.
2889 log_error(LOG_LEVEL_INFO,
2890 "MS IIS5 hack didn't produce valid headers.");
2896 * Since we have to wait for more from the server before
2897 * we can parse the headers we just continue here.
2903 /* Did we actually get anything? */
2904 if (NULL == csp->headers->first)
2906 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
2907 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2908 write_socket(csp->cfd, NO_SERVER_DATA_RESPONSE, strlen(NO_SERVER_DATA_RESPONSE));
2909 free_http_request(http);
2910 mark_server_socket_tainted(csp);
2914 assert(csp->headers->first->str);
2916 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
2917 strncmpic(csp->headers->first->str, "ICY", 3))
2920 * It doesn't look like a HTTP (or Shoutcast) response:
2921 * tell the client and log the problem.
2923 if (strlen(csp->headers->first->str) > 30)
2925 csp->headers->first->str[30] = '\0';
2927 log_error(LOG_LEVEL_ERROR,
2928 "Invalid server or forwarder response. Starts with: %s",
2929 csp->headers->first->str);
2930 log_error(LOG_LEVEL_CLF,
2931 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2932 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
2933 strlen(INVALID_SERVER_HEADERS_RESPONSE));
2934 free_http_request(http);
2935 mark_server_socket_tainted(csp);
2940 * We have now received the entire server header,
2941 * filter it and send the result to the client
2943 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
2945 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
2947 hdr = list_to_text(csp->headers);
2950 /* FIXME Should handle error properly */
2951 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2954 if (crunch_response_triggered(csp, crunchers_light))
2957 * One of the tags created by a server-header
2958 * tagger triggered a crunch. We already
2959 * delivered the crunch response to the client
2960 * and are done here after cleaning up.
2963 mark_server_socket_tainted(csp);
2966 /* Buffer and pcrs filter this if appropriate. */
2968 if (!http->ssl) /* We talk plaintext */
2970 content_filter = get_filter_function(csp);
2973 * Only write if we're not buffering for content modification
2975 if (!content_filter)
2978 * Write the server's (modified) header to
2979 * the client (along with anything else that
2980 * may be in the buffer)
2983 if (write_socket(csp->cfd, hdr, strlen(hdr))
2984 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
2986 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
2989 * The write failed, so don't bother mentioning it
2990 * to the client... it probably can't hear us anyway.
2993 mark_server_socket_tainted(csp);
2997 byte_count += (size_t)len;
3002 * XXX: the header lenght should probably
3003 * be calculated by get_server_headers().
3005 int header_length = csp->iob->cur - header_start;
3006 assert(csp->iob->cur > header_start);
3007 byte_count += (size_t)(len - header_length);
3010 /* we're finished with the server's header */
3016 * If this was a MS IIS/5 hack then it means the server
3017 * has already closed the connection. Nothing more to read.
3022 log_error(LOG_LEVEL_INFO,
3023 "Closed server connection detected with MS IIS5 hack enabled.");
3029 mark_server_socket_tainted(csp);
3030 return; /* huh? we should never get here */
3033 if (csp->content_length == 0)
3036 * If Privoxy didn't recalculate the Content-Lenght,
3037 * byte_count is still correct.
3039 csp->content_length = byte_count;
3042 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
3043 csp->ip_addr_str, http->ocmd, csp->content_length);
3047 /*********************************************************************
3051 * Description : This is little more than chat. We only "serve" to
3052 * to close any socket that chat may have opened.
3055 * 1 : csp = Current client state (buffers, headers, etc...)
3059 *********************************************************************/
3061 void serve(struct client_state *csp)
3062 #else /* ifndef AMIGA */
3063 static void serve(struct client_state *csp)
3064 #endif /* def AMIGA */
3067 close_socket(csp->cfd);
3069 if (csp->sfd != JB_INVALID_SOCKET)
3071 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3072 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
3074 remember_connection(csp->sfd, csp->http, forward_url(csp, csp->http));
3078 forget_connection(csp->sfd);
3079 close_socket(csp->sfd);
3082 close_socket(csp->sfd);
3083 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3086 csp->flags &= ~CSP_FLAG_ACTIVE;
3092 /*********************************************************************
3094 * Function : server_thread
3096 * Description : We only exist to call `serve' in a threaded environment.
3099 * 1 : data = Current client state (buffers, headers, etc...)
3101 * Returns : Always 0.
3103 *********************************************************************/
3104 static int32 server_thread(void *data)
3106 serve((struct client_state *) data);
3113 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3114 /*********************************************************************
3118 * Description : Print usage info & exit.
3120 * Parameters : Pointer to argv[0] for identifying ourselves
3124 *********************************************************************/
3125 static void usage(const char *myname)
3127 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
3131 #endif /* defined(unix) */
3134 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
3135 #endif /* defined(unix) */
3136 "[--version] [configfile]\n"
3137 "Aborting\n", myname);
3142 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
3145 #ifdef MUTEX_LOCKS_AVAILABLE
3146 /*********************************************************************
3148 * Function : privoxy_mutex_lock
3150 * Description : Locks a mutex.
3153 * 1 : mutex = The mutex to lock.
3155 * Returns : Void. May exit in case of errors.
3157 *********************************************************************/
3158 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
3160 #ifdef FEATURE_PTHREAD
3161 int err = pthread_mutex_lock(mutex);
3164 if (mutex != &log_mutex)
3166 log_error(LOG_LEVEL_FATAL,
3167 "Mutex locking failed: %s.\n", strerror(err));
3172 EnterCriticalSection(mutex);
3173 #endif /* def FEATURE_PTHREAD */
3177 /*********************************************************************
3179 * Function : privoxy_mutex_unlock
3181 * Description : Unlocks a mutex.
3184 * 1 : mutex = The mutex to unlock.
3186 * Returns : Void. May exit in case of errors.
3188 *********************************************************************/
3189 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
3191 #ifdef FEATURE_PTHREAD
3192 int err = pthread_mutex_unlock(mutex);
3195 if (mutex != &log_mutex)
3197 log_error(LOG_LEVEL_FATAL,
3198 "Mutex unlocking failed: %s.\n", strerror(err));
3203 LeaveCriticalSection(mutex);
3204 #endif /* def FEATURE_PTHREAD */
3208 /*********************************************************************
3210 * Function : privoxy_mutex_init
3212 * Description : Prepares a mutex.
3215 * 1 : mutex = The mutex to initialize.
3217 * Returns : Void. May exit in case of errors.
3219 *********************************************************************/
3220 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
3222 #ifdef FEATURE_PTHREAD
3223 int err = pthread_mutex_init(mutex, 0);
3226 printf("Fatal error. Mutex initialization failed: %s.\n",
3231 InitializeCriticalSection(mutex);
3232 #endif /* def FEATURE_PTHREAD */
3234 #endif /* def MUTEX_LOCKS_AVAILABLE */
3236 /*********************************************************************
3238 * Function : initialize_mutexes
3240 * Description : Prepares mutexes if mutex support is available.
3244 * Returns : Void, exits in case of errors.
3246 *********************************************************************/
3247 static void initialize_mutexes(void)
3249 #ifdef MUTEX_LOCKS_AVAILABLE
3251 * Prepare global mutex semaphores
3253 privoxy_mutex_init(&log_mutex);
3254 privoxy_mutex_init(&log_init_mutex);
3255 privoxy_mutex_init(&connection_reuse_mutex);
3258 * XXX: The assumptions below are a bit naive
3259 * and can cause locks that aren't necessary.
3261 * For example older FreeBSD versions (< 6.x?)
3262 * have no gethostbyname_r, but gethostbyname is
3265 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
3266 privoxy_mutex_init(&resolver_mutex);
3267 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
3269 * XXX: should we use a single mutex for
3270 * localtime() and gmtime() as well?
3272 #ifndef HAVE_GMTIME_R
3273 privoxy_mutex_init(&gmtime_mutex);
3274 #endif /* ndef HAVE_GMTIME_R */
3276 #ifndef HAVE_LOCALTIME_R
3277 privoxy_mutex_init(&localtime_mutex);
3278 #endif /* ndef HAVE_GMTIME_R */
3281 privoxy_mutex_init(&rand_mutex);
3282 #endif /* ndef HAVE_RANDOM */
3283 #endif /* def MUTEX_LOCKS_AVAILABLE */
3287 /*********************************************************************
3291 * Description : Load the config file and start the listen loop.
3292 * This function is a lot more *sane* with the `load_config'
3293 * and `listen_loop' functions; although it stills does
3294 * a *little* too much for my taste.
3297 * 1 : argc = Number of parameters (including $0).
3298 * 2 : argv = Array of (char *)'s to the parameters.
3300 * Returns : 1 if : can't open config file, unrecognized directive,
3301 * stats requested in multi-thread mode, can't open the
3302 * log file, can't open the jar file, listen port is invalid,
3303 * any load fails, and can't bind port.
3305 * Else main never returns, the process must be signaled
3306 * to terminate execution. Or, on Windows, use the
3307 * "File", "Exit" menu option.
3309 *********************************************************************/
3311 int real_main(int argc, const char *argv[])
3313 int main(int argc, const char *argv[])
3317 unsigned int random_seed;
3319 struct passwd *pw = NULL;
3320 struct group *grp = NULL;
3323 char *pre_chroot_nslookup_to_load_resolver = NULL;
3330 #if !defined(_WIN32)
3338 * Parse the command line arguments
3340 * XXX: simply printing usage information in case of
3341 * invalid arguments isn't particularly user friendly.
3343 while (++argc_pos < argc)
3346 /* Check to see if the service must be installed or uninstalled */
3347 if (strncmp(argv[argc_pos], "--install", 9) == 0)
3349 const char *pName = argv[argc_pos] + 9;
3352 exit( (install_service(pName)) ? 0 : 1 );
3354 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
3356 const char *pName = argv[argc_pos] + 11;
3359 exit((uninstall_service(pName)) ? 0 : 1);
3361 else if (strcmp(argv[argc_pos], "--service" ) == 0)
3363 bRunAsService = TRUE;
3364 w32_set_service_cwd();
3365 atexit(w32_service_exit_notify);
3368 #endif /* defined(_WIN32) */
3371 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3373 if (strcmp(argv[argc_pos], "--help") == 0)
3378 else if(strcmp(argv[argc_pos], "--version") == 0)
3380 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
3386 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
3391 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
3393 if (++argc_pos == argc) usage(argv[0]);
3394 pidfile = strdup(argv[argc_pos]);
3397 else if (strcmp(argv[argc_pos], "--user" ) == 0)
3399 if (++argc_pos == argc) usage(argv[argc_pos]);
3401 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
3404 if (NULL == (grp = getgrnam(p)))
3406 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
3410 if (NULL == (pw = getpwnam(argv[argc_pos])))
3412 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
3415 if (p != NULL) *--p = '\0';
3418 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
3420 if (++argc_pos == argc) usage(argv[0]);
3421 pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
3424 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
3428 #endif /* defined(unix) */
3430 else if (argc_pos + 1 != argc)
3433 * This is neither the last command line
3434 * option, nor was it recognized before,
3435 * therefore it must be invalid.
3441 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3443 configfile = argv[argc_pos];
3446 } /* -END- while (more arguments) */
3449 if ( *configfile != '/' )
3451 char cwd[BUFFER_SIZE];
3453 size_t abs_file_size;
3455 /* make config-filename absolute here */
3456 if (NULL == getcwd(cwd, sizeof(cwd)))
3458 perror("failed to get current working directory");
3463 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3464 basedir = strdup(cwd);
3466 if (NULL == basedir ||
3467 NULL == (abs_file = malloc(abs_file_size)))
3469 perror("malloc failed");
3472 strlcpy(abs_file, basedir, abs_file_size);
3473 strlcat(abs_file, "/", abs_file_size );
3474 strlcat(abs_file, configfile, abs_file_size);
3475 configfile = abs_file;
3477 #endif /* defined unix */
3481 clients->next = NULL;
3483 /* XXX: factor out initialising after the next stable release. */
3486 #elif defined(_WIN32)
3490 /* Prepare mutexes if supported and necessary. */
3491 initialize_mutexes();
3493 /* Enable logging until further notice. */
3494 init_log_module(Argv[0]);
3496 random_seed = (unsigned int)time(NULL);
3498 srandom(random_seed);
3501 #endif /* ifdef HAVE_RANDOM */
3504 * Unix signal handling
3506 * Catch the abort, interrupt and terminate signals for a graceful exit
3507 * Catch the hangup signal so the errlog can be reopened.
3508 * Ignore the broken pipe signals (FIXME: Why?)
3510 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3513 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3514 const int ignored_signals[] = { SIGPIPE, 0 };
3516 for (idx = 0; catched_signals[idx] != 0; idx++)
3518 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3519 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3521 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3522 #endif /* ifdef sun */
3524 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3528 for (idx = 0; ignored_signals[idx] != 0; idx++)
3530 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3532 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3537 #else /* ifdef _WIN32 */
3538 # ifdef _WIN_CONSOLE
3540 * We *are* in a windows console app.
3541 * Print a verbose messages about FAQ's and such
3543 printf("%s", win32_blurb);
3544 # endif /* def _WIN_CONSOLE */
3545 #endif /* def _WIN32 */
3548 /* Initialize the CGI subsystem */
3549 cgi_init_error_messages();
3552 * If runnig on unix and without the --nodaemon
3553 * option, become a daemon. I.e. fork, detach
3554 * from tty and get process group leadership
3567 if ( pid < 0 ) /* error */
3572 else if ( pid != 0 ) /* parent */
3577 * must check for errors
3578 * child died due to missing files aso
3581 wpid = waitpid( pid, &status, WNOHANG );
3590 /* Should be more portable, but not as well tested */
3595 #else /* ndef __FreeBSD__ */
3597 #endif /* ndef __FreeBSD__ */
3598 fd = open("/dev/tty", O_RDONLY);
3601 /* no error check here */
3602 ioctl( fd, TIOCNOTTY,0 );
3607 * stderr (fd 2) will be closed later on, when the
3608 * log file has been parsed.
3615 } /* -END- if (!no_daemon) */
3618 * As soon as we have written the PID file, we can switch
3619 * to the user and group ID indicated by the --user option
3625 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3627 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3633 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3635 /* Read the time zone file from /etc before doing chroot. */
3637 if (NULL != pre_chroot_nslookup_to_load_resolver
3638 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3640 /* Initialize resolver library. */
3641 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3643 if (chroot(pw->pw_dir) < 0)
3645 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3649 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3652 if (setuid(pw->pw_uid))
3654 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3658 char putenv_dummy[64];
3660 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3661 if (putenv(putenv_dummy) != 0)
3663 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3666 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3667 if (putenv(putenv_dummy) != 0)
3669 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3675 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3678 #endif /* defined unix */
3681 /* This will be FALSE unless the command line specified --service
3685 /* Yup, so now we must attempt to establish a connection
3686 * with the service dispatcher. This will only work if this
3687 * process was launched by the service control manager to
3688 * actually run as a service. If this isn't the case, i've
3689 * known it take around 30 seconds or so for the call to return.
3692 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3693 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3695 /* Service has run, and at this point is now being stopped, so just return */
3700 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3702 /* An error occurred. Usually it's because --service was wrongly specified
3703 * and we were unable to connect to the Service Control Dispatcher because
3704 * it wasn't expecting us and is therefore not listening.
3706 * For now, just continue below to call the listen_loop function.
3709 #endif /* def _WIN32 */
3719 /*********************************************************************
3721 * Function : bind_port_helper
3723 * Description : Bind the listen port. Handles logging, and aborts
3727 * 1 : config = Privoxy configuration. Specifies port
3730 * Returns : Port that was opened.
3732 *********************************************************************/
3733 static jb_socket bind_port_helper(struct configuration_spec * config)
3738 if (config->haddr == NULL)
3740 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3745 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3746 config->hport, config->haddr);
3749 result = bind_port(config->haddr, config->hport, &bfd);
3756 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3757 "There may be another Privoxy or some other "
3758 "proxy running on port %d",
3759 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
3760 config->hport, config->hport);
3763 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3764 "The hostname is not resolvable",
3765 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3768 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
3769 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3772 /* shouldn't get here */
3773 return JB_INVALID_SOCKET;
3776 config->need_bind = 0;
3783 /* Without this simple workaround we get this compiler warning from _beginthread
3784 * warning C4028: formal parameter 1 different from declaration
3786 void w32_service_listen_loop(void *p)
3790 #endif /* def _WIN32 */
3793 /*********************************************************************
3795 * Function : listen_loop
3797 * Description : bind the listen port and enter a "FOREVER" listening loop.
3803 *********************************************************************/
3804 static void listen_loop(void)
3806 struct client_state *csp = NULL;
3808 struct configuration_spec * config;
3810 config = load_config();
3812 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3814 * XXX: Should be relocated once it no
3815 * longer needs to emit log messages.
3817 initialize_reusable_connections();
3818 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3820 bfd = bind_port_helper(config);
3822 #ifdef FEATURE_GRACEFUL_TERMINATION
3823 while (!g_terminate)
3828 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
3829 while (waitpid(-1, NULL, WNOHANG) > 0)
3831 /* zombie children */
3833 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
3836 * Free data that was used by died threads
3842 * Re-open the errlog after HUP signal
3844 if (received_hup_signal)
3846 if (NULL != config->logfile)
3848 init_error_log(Argv[0], config->logfile);
3850 received_hup_signal = 0;
3854 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
3856 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
3860 csp->flags |= CSP_FLAG_ACTIVE;
3861 csp->sfd = JB_INVALID_SOCKET;
3863 csp->config = config = load_config();
3865 if ( config->need_bind )
3868 * Since we were listening to the "old port", we will not see
3869 * a "listen" param change until the next IJB request. So, at
3870 * least 1 more request must be made for us to find the new
3871 * setting. I am simply closing the old socket and binding the
3874 * Which-ever is correct, we will serve 1 more page via the
3875 * old settings. This should probably be a "show-proxy-args"
3876 * request. This should not be a so common of an operation
3877 * that this will hurt people's feelings.
3882 bfd = bind_port_helper(config);
3885 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
3887 if (!accept_connection(csp, bfd))
3889 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
3902 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
3905 #ifdef FEATURE_TOGGLE
3906 if (global_toggle_state)
3907 #endif /* def FEATURE_TOGGLE */
3909 csp->flags |= CSP_FLAG_TOGGLED_ON;
3912 if (run_loader(csp))
3914 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
3915 /* Never get here - LOG_LEVEL_FATAL causes program exit */
3919 if (block_acl(NULL,csp))
3921 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
3922 close_socket(csp->cfd);
3926 #endif /* def FEATURE_ACL */
3928 /* add it to the list of clients */
3929 csp->next = clients->next;
3930 clients->next = csp;
3932 if (config->multi_threaded)
3936 /* this is a switch () statment in the C preprocessor - ugh */
3937 #undef SELECTED_ONE_OPTION
3939 /* Use Pthreads in preference to native code */
3940 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
3941 #define SELECTED_ONE_OPTION
3943 pthread_t the_thread;
3944 pthread_attr_t attrs;
3946 pthread_attr_init(&attrs);
3947 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
3948 errno = pthread_create(&the_thread, &attrs,
3949 (void * (*)(void *))serve, csp);
3950 child_id = errno ? -1 : 0;
3951 pthread_attr_destroy(&attrs);
3955 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
3956 #define SELECTED_ONE_OPTION
3957 child_id = _beginthread(
3958 (void (*)(void *))serve,
3963 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
3964 #define SELECTED_ONE_OPTION
3965 child_id = _beginthread(
3966 (void(* _Optlink)(void*))serve,
3972 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
3973 #define SELECTED_ONE_OPTION
3975 thread_id tid = spawn_thread
3976 (server_thread, "server", B_NORMAL_PRIORITY, csp);
3978 if ((tid >= 0) && (resume_thread(tid) == B_OK))
3980 child_id = (int) tid;
3989 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
3990 #define SELECTED_ONE_OPTION
3991 csp->cfd = ReleaseSocket(csp->cfd, -1);
3994 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3995 NP_Output, Output(),
3996 NP_CloseOutput, FALSE,
3997 NP_Name, (ULONG)"privoxy child",
4001 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4002 NP_Output, Output(),
4003 NP_CloseOutput, FALSE,
4004 NP_Name, (ULONG)"privoxy child",
4005 NP_StackSize, 200*1024,
4011 ((struct Task *)child_id)->tc_UserData = csp;
4012 Signal((struct Task *)child_id, SIGF_SINGLE);
4017 #if !defined(SELECTED_ONE_OPTION)
4020 /* This block is only needed when using fork().
4021 * When using threads, the server thread was
4022 * created and run by the call to _beginthread().
4024 if (child_id == 0) /* child */
4027 #ifdef FEATURE_TOGGLE
4028 int inherited_toggle_state = global_toggle_state;
4029 #endif /* def FEATURE_TOGGLE */
4034 * If we've been toggled or we've blocked the request, tell Mom
4037 #ifdef FEATURE_TOGGLE
4038 if (inherited_toggle_state != global_toggle_state)
4040 rc |= RC_FLAG_TOGGLED;
4042 #endif /* def FEATURE_TOGGLE */
4044 #ifdef FEATURE_STATISTICS
4045 if (csp->flags & CSP_FLAG_REJECTED)
4047 rc |= RC_FLAG_BLOCKED;
4049 #endif /* ndef FEATURE_STATISTICS */
4053 else if (child_id > 0) /* parent */
4055 /* in a fork()'d environment, the parent's
4056 * copy of the client socket and the CSP
4060 #if !defined(_WIN32) && !defined(__CYGWIN__)
4062 wait( &child_status );
4065 * Evaluate child's return code: If the child has
4066 * - been toggled, toggle ourselves
4067 * - blocked its request, bump up the stats counter
4070 #ifdef FEATURE_TOGGLE
4071 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
4073 global_toggle_state = !global_toggle_state;
4075 #endif /* def FEATURE_TOGGLE */
4077 #ifdef FEATURE_STATISTICS
4079 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
4083 #endif /* def FEATURE_STATISTICS */
4085 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
4086 close_socket(csp->cfd);
4087 csp->flags &= ~CSP_FLAG_ACTIVE;
4091 #undef SELECTED_ONE_OPTION
4092 /* end of cpp switch () */
4094 if (child_id < 0) /* failed */
4096 char buf[BUFFER_SIZE];
4098 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
4100 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
4102 write_socket(csp->cfd, buf, strlen(buf));
4103 close_socket(csp->cfd);
4104 csp->flags &= ~CSP_FLAG_ACTIVE;
4115 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
4117 /* Clean up. Aim: free all memory (no leaks) */
4118 #ifdef FEATURE_GRACEFUL_TERMINATION
4120 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
4122 unload_current_config_file();
4123 unload_current_actions_file();
4124 unload_current_re_filterfile();
4125 #ifdef FEATURE_TRUST
4126 unload_current_trust_file();
4129 if (config->multi_threaded)
4136 } while ((clients->next != NULL) && (--i > 0));
4140 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
4151 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
4152 /* Cleanup - remove taskbar icon etc. */
4157 #endif /* FEATURE_GRACEFUL_TERMINATION */