1 const char jcc_rcs[] = "$Id: jcc.c,v 1.202 2008/11/02 18:40:34 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 1.202 2008/11/02 18:40:34 fabiankeil
37 * If we received a different amount of data than we expected,
38 * log a warning and make sure the server socket isn't reused.
40 * Revision 1.201 2008/11/02 16:48:20 fabiankeil
41 * Revert revision 1.195 and try again.
43 * Revision 1.200 2008/10/26 16:53:18 fabiankeil
46 * Revision 1.199 2008/10/26 15:36:10 fabiankeil
47 * Remove two debug messages with LOG_LEVEL_INFO.
49 * Revision 1.198 2008/10/22 15:19:55 fabiankeil
50 * Once More, With Feeling: if there is no logfile
51 * because the user didn't specify one, we shouldn't
52 * call init_error_log() after receiving SIGHUP either.
54 * Revision 1.197 2008/10/20 17:02:40 fabiankeil
55 * If SIGHUP is received while we aren't running in daemon
56 * mode, calling init_error_log() would be a mistake.
58 * Revision 1.196 2008/10/16 09:16:41 fabiankeil
59 * - Fix two gcc44 conversion warnings.
60 * - Don't bother logging the last five bytes
63 * Revision 1.195 2008/10/13 16:04:37 fabiankeil
64 * Make sure we don't try to reuse tainted server sockets.
66 * Revision 1.194 2008/10/12 18:35:18 fabiankeil
67 * The last commit was a bit too ambitious, apparently the content
68 * length adjustment is only necessary if we aren't buffering.
70 * Revision 1.193 2008/10/12 15:57:35 fabiankeil
71 * Fix content length calculation if we read headers
72 * and the start of the body at once. Now that we have
73 * FEATURE_CONNECTION_KEEP_ALIVE, it actually matters.
75 * Revision 1.192 2008/10/11 18:19:14 fabiankeil
76 * Even more chat() cosmetics.
78 * Revision 1.191 2008/10/11 18:00:14 fabiankeil
79 * Reformat some comments in chat().
81 * Revision 1.190 2008/10/11 14:58:00 fabiankeil
82 * In case of chunk-encoded content, stop reading if
83 * the buffer looks like it ends with the last chunk.
85 * Revision 1.189 2008/10/11 09:53:00 fabiankeil
86 * Let server_response_is_complete() deal properly with
87 * content that is neither buffered nor read all at once.
89 * Revision 1.188 2008/10/09 18:21:41 fabiankeil
90 * Flush work-in-progress changes to keep outgoing connections
91 * alive where possible. Incomplete and mostly #ifdef'd out.
93 * Revision 1.187 2008/09/07 12:35:05 fabiankeil
94 * Add mutex lock support for _WIN32.
96 * Revision 1.186 2008/09/04 08:13:58 fabiankeil
97 * Prepare for critical sections on Windows by adding a
98 * layer of indirection before the pthread mutex functions.
100 * Revision 1.185 2008/08/30 12:03:07 fabiankeil
101 * Remove FEATURE_COOKIE_JAR.
103 * Revision 1.184 2008/08/22 15:34:45 fabiankeil
104 * - Silence LLVM/Clang complaint.
105 * - Make received_hup_signal static.
106 * - Hide definitions for basedir, pidfile and received_hup_signal
107 * from __EMX__ as they only seem to be used in case of #ifdef unix.
109 * Revision 1.183 2008/08/21 07:09:35 fabiankeil
110 * Accept Shoutcast responses again. Problem reported
111 * and fix suggested by Stefan in #2062860.
113 * Revision 1.182 2008/06/27 11:13:56 fabiankeil
114 * Fix possible NULL-pointer dereference reported
115 * by din_a4 in #2003937. Pointy hat to me.
117 * Revision 1.181 2008/05/21 15:47:15 fabiankeil
118 * Streamline sed()'s prototype and declare
119 * the header parse and add structures static.
121 * Revision 1.180 2008/05/21 15:26:32 fabiankeil
122 * - Mark csp as immutable for send_crunch_response().
123 * - Fix comment spelling.
125 * Revision 1.179 2008/05/20 20:13:32 fabiankeil
126 * Factor update_server_headers() out of sed(), ditch the
127 * first_run hack and make server_patterns_light static.
129 * Revision 1.178 2008/05/10 13:23:38 fabiankeil
130 * Don't provide get_header() with the whole client state
131 * structure when it only needs access to csp->iob.
133 * Revision 1.177 2008/05/10 11:51:12 fabiankeil
134 * Make the "read the rest of the headers" loop a bit more readable.
136 * Revision 1.176 2008/05/10 11:37:57 fabiankeil
137 * - Instead of logging when the IIS5 hack is enabled, log when it fails.
138 * - Remove useless comment.
140 * Revision 1.175 2008/05/09 18:53:59 fabiankeil
141 * Fix comment grammar.
143 * Revision 1.174 2008/05/07 18:05:53 fabiankeil
144 * Remove the pointless buffer in client_protocol_is_unsupported().
146 * Revision 1.173 2008/05/06 15:09:00 fabiankeil
147 * Least-effort fix for bug #1821930 (reported by Lee):
148 * If the response doesn't look like HTTP,
149 * tell the client and log the problem.
151 * Revision 1.172 2008/04/16 16:38:21 fabiankeil
152 * Don't pass the whole csp structure to flush_socket()
153 * when it only needs a file descriptor and a buffer.
155 * Revision 1.171 2008/03/27 18:27:25 fabiankeil
156 * Remove kill-popups action.
158 * Revision 1.170 2008/03/06 16:33:46 fabiankeil
159 * If limit-connect isn't used, don't limit CONNECT requests to port 443.
161 * Revision 1.169 2008/03/04 18:30:39 fabiankeil
162 * Remove the treat-forbidden-connects-like-blocks action. We now
163 * use the "blocked" page for forbidden CONNECT requests by default.
165 * Revision 1.168 2008/03/02 12:25:25 fabiankeil
166 * Also use shiny new connect_port_is_forbidden() in jcc.c.
168 * Revision 1.167 2008/02/23 16:57:12 fabiankeil
169 * Rename url_actions() to get_url_actions() and let it
170 * use the standard parameter ordering.
172 * Revision 1.166 2008/02/23 16:33:43 fabiankeil
173 * Let forward_url() use the standard parameter ordering
174 * and mark its second parameter immutable.
176 * Revision 1.165 2008/02/02 19:36:56 fabiankeil
177 * Remove the "Listening ... for local connections only" log message.
178 * Whether or not remote connections are able to reach Privoxy is up
179 * to the operating system.
181 * Revision 1.164 2007/12/16 18:32:46 fabiankeil
182 * Prevent the log messages for CONNECT requests to unacceptable
183 * ports from printing the limit-connect argument as [null] if
184 * limit-connect hasn't been explicitly enabled.
186 * Revision 1.163 2007/12/13 01:47:11 david__schmidt
187 * Make sure all console-mode apps get a usage() instance
189 * Revision 1.162 2007/12/06 17:54:57 fabiankeil
190 * Reword NO_SERVER_DATA_RESPONSE to make it harder
191 * to misunderstand what the message is all about.
193 * Revision 1.161 2007/12/04 19:44:22 fabiankeil
194 * Unbreak trustfile which previously didn't work without
195 * FEATURE_TOGGLE. Fixes BR#1843585, reported by Lee.
197 * Revision 1.160 2007/11/29 18:00:29 fabiankeil
198 * Plug memory leak. Spotted by Valgrind, triggered by
199 * Privoxy-Regression-Test feeding proxyfuzz.py.
201 * Revision 1.159 2007/11/24 14:34:09 fabiankeil
202 * In the HTTP snipplets, refer to the client as client.
204 * Revision 1.158 2007/11/11 16:44:17 fabiankeil
205 * Emit a log message when activating the MS IIS5 hack.
207 * Revision 1.157 2007/11/03 17:34:49 fabiankeil
208 * Log the "weak randomization factor" warning only
209 * once for mingw32 and provide some more details.
211 * Revision 1.156 2007/11/01 18:20:58 fabiankeil
212 * Initialize log module after initializing mutexes, future
213 * deadlocks in that code should now work cross-platform.
215 * Revision 1.155 2007/10/23 20:12:45 fabiankeil
216 * Fix first CSUCCEED line to end in \r\n as required by RFC1945.
217 * Reported by Bert van Leeuwen in BR#1818808.
219 * Revision 1.154 2007/10/19 17:00:08 fabiankeil
220 * Downgrade "Flushing header and buffers" message to LOG_LEVEL_INFO.
222 * Revision 1.153 2007/10/14 14:12:41 fabiankeil
223 * When in daemon mode, close stderr after the configuration file has been
224 * parsed the first time. If logfile isn't set, stop logging. Fixes BR#897436.
226 * Revision 1.152 2007/10/04 18:03:34 fabiankeil
227 * - Fix a crash when parsing invalid requests whose first header
228 * is rejected by get_header(). Regression (re?)introduced
229 * in r1.143 by yours truly.
230 * - Move ACTION_VANILLA_WAFER handling into parsers.c's
231 * client_cookie_adder() to make sure send-vanilla-wafer can be
232 * controlled through tags (and thus regression-tested).
234 * Revision 1.151 2007/09/29 10:21:16 fabiankeil
235 * - Move get_filter_function() from jcc.c to filters.c
236 * so the filter functions can be static.
237 * - Don't bother filtering body-less responses.
239 * Revision 1.150 2007/09/28 16:39:29 fabiankeil
240 * Execute content filters through execute_content_filter().
242 * Revision 1.149 2007/09/04 15:08:48 fabiankeil
243 * Initialize req to NULL to make sure it's defined if the
244 * first read_socket() call fails. Reported by icmp30.
246 * Revision 1.148 2007/08/26 16:47:13 fabiankeil
247 * Add Stephen Gildea's --pre-chroot-nslookup patch [#1276666],
248 * extensive comments moved to user manual.
250 * Revision 1.147 2007/08/25 14:42:40 fabiankeil
251 * Don't crash if a broken header filter wiped out the request line.
253 * Revision 1.146 2007/08/20 17:09:32 fabiankeil
254 * Fix byte_count calculation in case of flushes
255 * and don't parse the server headers a second time.
257 * Revision 1.145 2007/08/19 13:13:31 fabiankeil
258 * - If there's a connection problem after we already forwarded
259 * parts of the original content, just hang up. Fixes BR#1776724.
260 * - Fix warnings about unused code on mingw32.
261 * - In case of flushes, calculate the byte count
262 * less incorrectly (I think).
264 * Revision 1.144 2007/08/11 14:43:22 fabiankeil
265 * Add some more prototypes for static functions.
267 * Revision 1.143 2007/08/05 13:58:19 fabiankeil
268 * Comment out request_contains_null_bytes() until it's used again.
270 * Revision 1.142 2007/08/05 13:50:26 fabiankeil
271 * #1763173 from Stefan Huehner: s@const static@static const@
272 * and declare some more functions static.
274 * Revision 1.141 2007/08/04 09:56:23 fabiankeil
275 * - Log rejected CONNECT requests with LOG_LEVEL_INFO
276 * and explain why they were rejected in the first place.
277 * - Fix the LOG_LEVEL_CLF message for crunches of unallowed
278 * CONNECT requests. The request line was missing.
279 * - Add two more XXX reminders as we don't have enough already.
281 * Revision 1.140 2007/07/21 11:51:36 fabiankeil
282 * As Hal noticed, checking dispatch_cgi() as the last cruncher
283 * looks like a bug if CGI requests are blocked unintentionally,
284 * so don't do it unless the user enabled the new config option
285 * "allow-cgi-request-crunching".
287 * Revision 1.139 2007/07/14 07:46:41 fabiankeil
288 * - Allow to rewrite the request destination behind the client's back.
289 * - Turn the weird-looking unconditional for loop that
290 * reads the client request into a conditional while loop.
291 * Move the stuff that only runs once out of the loop.
292 * - Move parts of chat(), server_content_type() and the
293 * necessary stuff to fix BR#1750917 into get_filter_function().
295 * Revision 1.138 2007/06/03 18:45:18 fabiankeil
296 * Temporary workaround for BR#1730105.
298 * Revision 1.137 2007/06/01 18:16:36 fabiankeil
299 * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
300 * deadlocks and crashes on OpenBSD and possibly other OS with neither
301 * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
302 * Thanks to Ralf Horstmann for report and solution.
304 * Revision 1.136 2007/06/01 16:41:11 fabiankeil
305 * Add forward-override{} to change the forwarding settings through
306 * action sections. This is mainly interesting to forward different
307 * clients differently (for example based on User-Agent or request
310 * Revision 1.135 2007/05/24 17:03:50 fabiankeil
311 * - Let usage() mention the --chroot parameter.
312 * - Use read_socket() consistently and always leave
313 * the last buffer byte alone, even in cases where
314 * null termination (currently) doesn't matter.
316 * Revision 1.134 2007/05/16 14:59:46 fabiankeil
317 * - Fix config file loading on Unix if no config file is specified.
318 * Since r1.97 Privoxy would always interpret the last argument as
319 * config file, even if it's a valid command line option.
320 * - Abort in case of unrecognized command line options. Closes #1719696.
321 * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
322 * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
324 * Revision 1.133 2007/05/04 11:23:19 fabiankeil
325 * - Don't rerun crunchers that only depend on the request URL.
326 * - Don't count redirects and CGI requests as "blocked requests".
328 * Revision 1.132 2007/04/25 15:15:17 fabiankeil
329 * Support crunching based on tags created by server-header taggers.
331 * Revision 1.131 2007/04/22 13:24:50 fabiankeil
332 * Make HTTP snippets static (again). Add a Content-Type for those
333 * with content so the browser doesn't guess it based on the URL.
335 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
336 * Move crunching and request line rebuilding out of chat().
338 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
339 * Introduce tags as alternative way to specify which
340 * actions apply to a request. At the moment tags can be
341 * created based on client and server headers.
343 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
344 * Don't CLF-log CONNECT requests twice.
346 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
347 * Log the source address for ACL-related connection drops.
349 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
350 * New config option: enforce-blocks.
352 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
353 * - Move null byte check into separate function.
354 * - Don't confuse the client with error pages
355 * if a CONNECT request was already confirmed.
357 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
358 * Speed up NULL byte escaping and only log the complete
359 * NULL byte requests with header debugging enabled.
361 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
362 * Answer requests that contain NULL bytes with
363 * a custom response instead of waiting for more
364 * data until the client eventually hangs up.
366 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
367 * - Move delivery and logging of crunched responses
368 * from chat() into send_crunch_response().
369 * - Display the reason for generating http_responses.
370 * - Log the content length for LOG_LEVEL_CLF correctly
371 * (still incorrect for some fixed responses).
372 * - Reword an incorrect comment about
373 * treat-forbidden-connects-like-blocks violating
375 * - Add some log messages.
377 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
378 * Move mutex initialization into separate
379 * function and exit in case of errors.
381 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
382 * - Start to reduce chat()'s line count and move
383 * parts of it into separate functions.
384 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
386 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
387 * - Add Proxy-Agent header to HTTP snippets that are
388 * supposed to reach HTTP clients only.
389 * - Made a few CONNECT log messages more descriptive.
390 * - Catch completely empty server responses (as seen
391 * with Tor's fake ".noconnect" top level domain).
392 * - Use shiny new "forwarding-failed" template for socks errors.
394 * Revision 1.118 2007/01/07 07:43:43 joergs
395 * AmigaOS4 support added.
397 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
398 * Added config option accept-intercepted-requests
399 * and disabled it by default.
401 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
402 * Reverted parts of my last commit
403 * to keep error handling working.
405 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
406 * Fixed gcc43 conversion warnings.
408 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
409 * Fix -pedantic ISO C warning about converting
410 * from function pointer to object pointer.
412 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
413 * Silence compiler warning I introduced with my last commit.
415 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
416 * Mutex protect rand() if POSIX threading
417 * is used, warn the user if that's not possible
418 * and stop using it on _WIN32 where it could
421 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
422 * Don't prevent core dumps by catching SIGABRT.
423 * It's rude and makes debugging unreasonable painful.
425 * Revision 1.110 2006/12/13 14:52:53 etresoft
426 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
428 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
429 * Privoxy is now able to run as intercepting
430 * proxy in combination with any packet filter
431 * that does the port redirection. The destination
432 * is extracted from the "Host:" header which
433 * should be available for nearly all requests.
435 * Moved HTTP snipplets into jcc.c.
436 * Added error message for gopher proxy requests.
438 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
439 * Only unlink the pidfile if it's actually used.
441 * Change order of interception checks to make
442 * it possible to block or redirect requests for
445 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
446 * Make pthread mutex locking more generic. Instead of
447 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
448 * and use mutex locking unless there is an _r function
449 * available. Better safe than sorry.
451 * Fixes "./configure --disable-pthread" and should result
452 * in less threading-related problems on pthread-using platforms,
453 * but it still doesn't fix BR#1122404.
455 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
456 * Move pthread.h inclusion from jcc.c to jcc.h.
457 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
459 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
460 * Don't exit after receiving the second SIGHUP on Solaris.
462 * Fixes BR 1052235, but the same problem may exist on other
463 * systems. Once 3.0.6 is out we should use sigset()
464 * where available and see if it breaks anything.
466 * Revision 1.104 2006/09/23 13:26:38 roro
467 * Replace TABs by spaces in source code.
469 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
470 * Fix +redirect{}. Didn't work with -fast-redirects.
472 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
473 * Respond with 400 and a short text message
474 * if the client tries to use Privoxy as FTP proxy.
476 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
477 * Make number of retries in case of forwarded-connect problems
478 * a config file option (forwarded-connect-retries) and use 0 as
481 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
482 * Set random(3) seed.
484 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
485 * Follow the OpenBSD port's lead and protect the resolve
486 * functions on OpenBSD as well.
488 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
489 * --user fix. Only use the user as group if no group is specified.
490 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
492 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
493 * Windows service (re-)integration
497 * --install[:service_name]
498 * --uninstall[:service_name]
501 * They work as follows:
502 * --install will create a service for you and then terminate.
503 * By default the service name will be "privoxy" (without the quotes).
504 * However you can run multiple services if you wish, just by adding
505 * a colon and then a name (no spaces).
507 * --uninstall follows the exact same rules a --install.
509 * --service is used when the program is executed by the service
510 * control manager, and in normal circumstances would never be
511 * used as a command line argument.
513 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
514 * Windows service integration
516 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
517 * Incorporate Fabian Keil's patch work:
518 http://www.fabiankeil.de/sourcecode/privoxy/
520 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
521 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
522 * with what was really the latest development (the v_3_0_branch branch)
524 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
525 * Thanks to Jindrich Makovicka for a race condition fix for the log
526 * file. The race condition remains for non-pthread implementations.
527 * Reference patch #1175720.
529 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
530 * Add the ability to check jpeg images for invalid
531 * lengths of comment blocks. Defensive strategy
532 * against the exploit:
533 * Microsoft Security Bulletin MS04-028
534 * Buffer Overrun in JPEG Processing (GDI+) Could
535 * Allow Code Execution (833987)
536 * Enabled with +inspect-jpegs in actions files.
538 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
539 * - Fixed usage info for non-unix platforms
540 * - Fixed small cmdline parsing bug
542 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
543 * Diagnostics: Now preserve the returncode of pthread_create
544 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
546 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
547 * No longer ignore SIGCHLD. Fixes bug #769381
549 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
550 * Close jarfile on graceful exit, remove stray line
552 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
553 * Cosmetics: Killed a warning, a typo and an allocation left at exit
555 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
556 * No longer rely on non-POSIX.1 extensions of getcwd().
559 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
560 * Replaced setenv() by posix-compliant putenv()
561 * Thanks to Neil McCalden (nmcc AT users.sf.net).
563 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
564 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
566 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
567 * Clean-up and extension of improvements for forked mode:
568 * - Child's return code now consists of flags RC_FLAG_*
569 * - Reporting toggle to parent now properly #ifdef'ed
570 * - Children now report blocking to parent. This enables
571 * statistics in forked mode
573 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
574 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
575 * Children now report having been toggled through _exit(17), parents
576 * watch for that code and toggle themselves if found.
578 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
579 * Wrapping all *_r functions (the non-_r versions of them) with
580 * mutex semaphores for OSX. Hopefully this will take care of all
581 * of those pesky crash reports.
583 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
584 * Fixed two mostly harmless mem leaks
586 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
587 * Fix: Head of global clients list now initialized to NULL
589 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
590 * Added basic support for OPTIONS and TRACE HTTP methods:
591 * - New interceptor direct_response() added in chat().
592 * - sed() moved to earlier in the process, so that the
593 * Host: header is evaluated before actions and forwarding
596 * Revision 1.92 2002/05/08 16:00:46 oes
597 * Chat's buffer handling:
598 * - Fixed bug with unchecked out-of-mem conditions
599 * while reading client request & server headers
600 * - No longer predict if the buffer limit will be exceeded
601 * in the next read -- check add_to_iob's new
602 * return code. If buffer couldn't be extended
603 * (policy or out-of-mem) while
604 * - reading from client: abort
605 * - reading server headers: send error page
606 * - buffering server body for filter: flush,
607 * and if that fails: send error page
609 * Revision 1.91 2002/04/08 20:35:58 swa
612 * Revision 1.90 2002/04/02 14:57:28 oes
613 * Made sending wafers independent of FEATURE_COOKIE_JAR
615 * Revision 1.89 2002/03/31 17:18:59 jongfoster
616 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
618 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
619 * More compiler warning message maintenance
621 * Revision 1.87 2002/03/26 22:29:54 swa
622 * we have a new homepage!
624 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
625 * Workaround for closing the jarfile before load_config() comes around again
627 * Revision 1.85 2002/03/24 15:23:33 jongfoster
630 * Revision 1.84 2002/03/24 13:25:43 swa
631 * name change related issues
633 * Revision 1.83 2002/03/16 23:54:06 jongfoster
634 * Adding graceful termination feature, to help look for memory leaks.
635 * If you enable this (which, by design, has to be done by hand
636 * editing config.h) and then go to http://i.j.b/die, then the program
637 * will exit cleanly after the *next* request. It should free all the
638 * memory that was used.
640 * Revision 1.82 2002/03/13 00:27:05 jongfoster
643 * Revision 1.81 2002/03/12 01:42:50 oes
644 * Introduced modular filters
646 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
647 * OS/2 port maintenance:
648 * - Fixed EMX build - it had decayed a little
649 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
650 * substituted a memset for now.
652 * Revision 1.79 2002/03/09 20:03:52 jongfoster
653 * - Making various functions return int rather than size_t.
654 * (Undoing a recent change). Since size_t is unsigned on
655 * Windows, functions like read_socket that return -1 on
656 * error cannot return a size_t.
658 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
659 * crashes, and also frequently caused JB to jump to 100%
660 * CPU and stay there. (Because it thought it had just
661 * read ((unsigned)-1) == 4Gb of data...)
663 * - The signature of write_socket has changed, it now simply
664 * returns success=0/failure=nonzero.
666 * - Trying to get rid of a few warnings --with-debug on
667 * Windows, I've introduced a new type "jb_socket". This is
668 * used for the socket file descriptors. On Windows, this
669 * is SOCKET (a typedef for unsigned). Everywhere else, it's
670 * an int. The error value can't be -1 any more, so it's
671 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
672 * Windows it maps to the #define INVALID_SOCKET.)
674 * - The signature of bind_port has changed.
676 * Revision 1.78 2002/03/08 21:35:04 oes
677 * Added optional group supplement to --user option. Will now use default group of user if no group given
679 * Revision 1.77 2002/03/07 03:52:06 oes
680 * - Fixed compiler warnings etc
681 * - Improved handling of failed DNS lookups
683 * Revision 1.76 2002/03/06 22:54:35 jongfoster
684 * Automated function-comment nitpicking.
686 * Revision 1.75 2002/03/06 10:02:19 oes
687 * Fixed stupid bug when --user was not given
689 * Revision 1.74 2002/03/06 00:49:31 jongfoster
690 * Fixing warning on Windows
691 * Making #ifdefs that refer to the same variable consistently
692 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
694 * Revision 1.73 2002/03/05 23:57:30 hal9
695 * Stray character 's' on line 1618 was breaking build.
697 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
698 * - Re-enable OS/2 building after new parms were added
699 * - Fix false out of memory report when resolving CGI templates when no IP
700 * address is available of failed attempt (a la no such domain)
702 * Revision 1.71 2002/03/05 18:13:56 oes
703 * Added --user option
705 * Revision 1.70 2002/03/05 04:52:42 oes
706 * Deleted non-errlog debugging code
708 * Revision 1.69 2002/03/04 23:50:00 jongfoster
709 * Splitting off bind_port() call into bind_port_helper(), with
712 * Revision 1.68 2002/03/04 20:17:32 oes
715 * Revision 1.67 2002/03/04 18:18:57 oes
716 * - Removed _DEBUG mode
717 * - Cleand up cmdline parsing
718 * - Introduced --no-daemon, --pidfile options
719 * - Cleaned up signal handling:
720 * - Terminate cleanly on INT, TERM and ABRT
721 * - Schedule logfile for re-opening on HUP
722 * - Ignore CHLD and PIPE
723 * - Leave the rest with their default handlers
724 * - Uniform handler registration
725 * - Added usage() function
726 * - Played styleguide police
728 * Revision 1.66 2002/03/03 15:06:55 oes
729 * Re-enabled automatic config reloading
731 * Revision 1.65 2002/03/03 14:49:11 oes
732 * Fixed CLF logging: Now uses client's original HTTP request
734 * Revision 1.64 2002/03/03 09:18:03 joergs
735 * Made jumbjuster work on AmigaOS again.
737 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
738 * Clean up a little CRLF unpleasantness that suddenly appeared
740 * Revision 1.62 2002/02/20 23:17:23 jongfoster
741 * Detecting some out-of memory conditions and exiting with a log message.
743 * Revision 1.61 2002/01/17 21:01:52 jongfoster
744 * Moving all our URL and URL pattern parsing code to urlmatch.c.
746 * Revision 1.60 2001/12/30 14:07:32 steudten
747 * - Add signal handling (unix)
748 * - Add SIGHUP handler (unix)
749 * - Add creation of pidfile (unix)
750 * - Add action 'top' in rc file (RH)
751 * - Add entry 'SIGNALS' to manpage
752 * - Add exit message to logfile (unix)
754 * Revision 1.59 2001/12/13 14:07:18 oes
755 * Fixed Bug: 503 error page now sent OK
757 * Revision 1.58 2001/11/30 23:37:24 jongfoster
758 * Renaming the Win32 config file to config.txt - this is almost the
759 * same as the corresponding UNIX name "config"
761 * Revision 1.57 2001/11/16 00:47:43 jongfoster
762 * Changing the tty-disconnection code to use setsid().
764 * Revision 1.56 2001/11/13 20:20:54 jongfoster
765 * Tabs->spaces, fixing a bug with missing {} around an if()
767 * Revision 1.55 2001/11/13 20:14:53 jongfoster
768 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
770 * Revision 1.54 2001/11/07 00:03:14 steudten
771 * Give reliable return value if an error
772 * occurs not just 0 with new daemon mode.
774 * Revision 1.53 2001/11/05 21:41:43 steudten
775 * Add changes to be a real daemon just for unix os.
776 * (change cwd to /, detach from controlling tty, set
777 * process group and session leader to the own process.
779 * Add some fatal-error log message for failed malloc().
780 * Add '-d' if compiled with 'configure --with-debug' to
781 * enable debug output.
783 * Revision 1.52 2001/10/26 20:11:20 jongfoster
784 * Fixing type mismatch
786 * Revision 1.51 2001/10/26 17:38:28 oes
789 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
790 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
791 * threads to call select() simultaneously. So, it's time to do a real, live,
792 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
793 * (native). Both versions will work, but using __OS2__ offers multi-threading.
795 * Revision 1.49 2001/10/23 21:41:35 jongfoster
796 * Added call to initialize the (statically-allocated of course)
797 * "out of memory" CGI response.
799 * Revision 1.48 2001/10/10 19:56:46 jongfoster
800 * Moving some code that wasn't cookie-related out of an #ifdef
803 * Revision 1.47 2001/10/10 16:44:36 oes
804 * Added CONNECT destination port limitation check
806 * Revision 1.46 2001/10/08 15:17:41 oes
807 * Re-enabled SSL forwarding
809 * Revision 1.45 2001/10/07 15:42:11 oes
810 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
812 * Moved downgrading of the HTTP version from parse_http_request to
813 * chat(), since we can't decide if it is necessary before we have
814 * determined the actions for the URL. The HTTP command is now
815 * *always* re-built so the repairs need no longer be special-cased.
817 * filter_popups now gets a csp pointer so it can raise the new
818 * CSP_FLAG_MODIFIED flag.
822 * Added configurable size limit for the IOB. If the IOB grows so
823 * large that the next read would exceed the limit, the header
824 * is generated, and the header & unfiltered buffer are flushed
825 * to the client. Chat then continues in non-buffering,
826 * non-filtering body mode.
828 * Revision 1.44 2001/10/02 18:13:57 oes
831 * Revision 1.43 2001/10/02 15:32:13 oes
832 * Moved generation of hdr
834 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
835 * Cleaning up 2 compiler warnings on OS/2.
837 * Revision 1.41 2001/09/16 17:05:14 jongfoster
838 * Removing unused #include showarg.h
840 * Revision 1.40 2001/09/16 15:41:45 jongfoster
841 * Fixing signed/unsigned comparison warning.
843 * Revision 1.39 2001/09/16 13:21:27 jongfoster
844 * Changes to use new list functions.
846 * Revision 1.38 2001/09/16 13:01:46 jongfoster
847 * Removing redundant function call that zeroed zalloc()'d memory.
849 * Revision 1.37 2001/09/10 11:12:24 oes
850 * Deleted unused variable
852 * Revision 1.36 2001/09/10 10:56:15 oes
853 * Silenced compiler warnings
855 * Revision 1.35 2001/07/31 14:44:22 oes
856 * Deleted unused size parameter from filter_popups()
858 * Revision 1.34 2001/07/30 22:08:36 jongfoster
859 * Tidying up #defines:
860 * - All feature #defines are now of the form FEATURE_xxx
861 * - Permanently turned off WIN_GUI_EDIT
862 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
864 * Revision 1.33 2001/07/29 19:32:00 jongfoster
865 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
867 * Revision 1.32 2001/07/29 18:47:05 jongfoster
868 * Adding missing #include "loadcfg.h"
870 * Revision 1.31 2001/07/29 12:17:48 oes
871 * Applied pthread fix by Paul Lieverse
873 * Revision 1.30 2001/07/25 22:57:13 jongfoster
874 * __BEOS__ no longer overrides FEATURE_PTHREAD.
875 * This is because FEATURE_PTHREAD will soon be widely used, so I
876 * want to keep it simple.
878 * Revision 1.29 2001/07/24 12:47:06 oes
879 * Applied BeOS support update by Eugenia
881 * Revision 1.28 2001/07/23 13:26:12 oes
882 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
884 * Revision 1.27 2001/07/19 19:09:47 haroon
885 * - Added code to take care of the situation where while processing the first
886 * server response (which includes the server header), after finding the end
887 * of the headers we were not looking past the end of the headers for
888 * content modification. I enabled it for filter_popups.
889 * Someone else should look to see if other similar operations should be
890 * done to the discarded portion of the buffer.
892 * Note 2001/07/20: No, the other content modification mechanisms will process
893 * the whole iob later anyway. --oes
895 * Revision 1.26 2001/07/18 12:31:36 oes
898 * Revision 1.25 2001/07/15 19:43:49 jongfoster
899 * Supports POSIX threads.
900 * Also removed some unused #includes.
902 * Revision 1.24 2001/07/13 14:00:40 oes
903 * - Generic content modification scheme:
904 * Each feature has its own applicability flag that is set
905 * from csp->action->flags.
906 * Replaced the "filtering" int flag , by a function pointer
907 * "content_filter" to the function that will do the content
908 * modification. If it is != NULL, the document will be buffered
909 * and processed through *content_filter, which must set
910 * csp->content_length and return a modified copy of the body
911 * or return NULL (on failiure).
912 * - Changed csp->is_text to the more generic bitmap csp->content_type
913 * which can currently take the valued CT_TEXT or CT_GIF
915 * - Removed all #ifdef PCRS
917 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
918 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
919 * the `block_acl' call. This prevents a compilation error when the user
920 * does not wish to use the "ACL" feature.
922 * Revision 1.22 2001/06/29 21:45:41 oes
923 * Indentation, CRLF->LF, Tab-> Space
925 * Revision 1.21 2001/06/29 13:29:36 oes
926 * - Cleaned up, improved comments
927 * - Unified all possible interceptors (CGI,
928 * block, trust, fast_redirect) in one
929 * place, with one (CGI) answer generation
930 * mechansim. Much clearer now.
931 * - Removed the GIF image generation, which
932 * is now done in filters.c:block_url()
933 * - Made error conditions like domain lookup
934 * failiure or (various) problems while talking
935 * to the server use cgi.c:error_response()
936 * instead of generating HTML/HTTP in chat() (yuck!)
937 * - Removed logentry from cancelled commit
939 * Revision 1.20 2001/06/09 10:55:28 jongfoster
940 * Changing BUFSIZ ==> BUFFER_SIZE
942 * Revision 1.19 2001/06/07 23:12:52 jongfoster
943 * Replacing function pointer in struct gateway with a directly
944 * called function forwarded_connect().
945 * Replacing struct gateway with struct forward_spec
947 * Revision 1.18 2001/06/03 19:12:16 oes
948 * introduced new cgi handling
950 * Revision 1.17 2001/06/01 20:07:23 jongfoster
951 * Now uses action +image-blocker{} rather than config->tinygif
953 * Revision 1.16 2001/06/01 18:49:17 jongfoster
954 * Replaced "list_share" with "list" - the tiny memory gain was not
955 * worth the extra complexity.
957 * Revision 1.15 2001/05/31 21:24:47 jongfoster
958 * Changed "permission" to "action" throughout.
959 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
960 * Moved vanilla wafer check into chat(), since we must now
961 * decide whether or not to add it based on the URL.
963 * Revision 1.14 2001/05/29 20:14:01 joergs
964 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
967 * Revision 1.13 2001/05/29 09:50:24 jongfoster
968 * Unified blocklist/imagelist/permissionslist.
969 * File format is still under discussion, but the internal changes
972 * Also modified interceptor behaviour:
973 * - We now intercept all URLs beginning with one of the following
974 * prefixes (and *only* these prefixes):
976 * * http://ijbswa.sf.net/config/
977 * * http://ijbswa.sourceforge.net/config/
978 * - New interceptors "home page" - go to http://i.j.b/ to see it.
979 * - Internal changes so that intercepted and fast redirect pages
980 * are not replaced with an image.
981 * - Interceptors now have the option to send a binary page direct
982 * to the client. (i.e. ijb-send-banner uses this)
983 * - Implemented show-url-info interceptor. (Which is why I needed
984 * the above interceptors changes - a typical URL is
985 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
986 * The previous mechanism would not have intercepted that, and
987 * if it had been intercepted then it then it would have replaced
990 * Revision 1.12 2001/05/27 22:17:04 oes
992 * - re_process_buffer no longer writes the modified buffer
993 * to the client, which was very ugly. It now returns the
994 * buffer, which it is then written by chat.
996 * - content_length now adjusts the Content-Length: header
997 * for modified documents rather than crunch()ing it.
998 * (Length info in csp->content_length, which is 0 for
999 * unmodified documents)
1001 * - For this to work, sed() is called twice when filtering.
1003 * Revision 1.11 2001/05/26 17:27:53 jongfoster
1004 * Added support for CLF and fixed LOG_LEVEL_LOG.
1005 * Also did CRLF->LF fix of my previous patch.
1007 * Revision 1.10 2001/05/26 15:26:15 jongfoster
1008 * ACL feature now provides more security by immediately dropping
1009 * connections from untrusted hosts.
1011 * Revision 1.9 2001/05/26 00:28:36 jongfoster
1012 * Automatic reloading of config file.
1013 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
1014 * Most of the global variables have been moved to a new
1015 * struct configuration_spec, accessed through csp->config->globalname
1016 * Most of the globals remaining are used by the Win32 GUI.
1018 * Revision 1.8 2001/05/25 22:43:18 jongfoster
1019 * Fixing minor memory leak and buffer overflow.
1021 * Revision 1.7 2001/05/25 22:34:30 jongfoster
1024 * Revision 1.6 2001/05/23 00:13:58 joergs
1025 * AmigaOS support fixed.
1027 * Revision 1.5 2001/05/22 18:46:04 oes
1029 * - Enabled filtering banners by size rather than URL
1030 * by adding patterns that replace all standard banner
1031 * sizes with the "Junkbuster" gif to the re_filterfile
1033 * - Enabled filtering WebBugs by providing a pattern
1034 * which kills all 1x1 images
1036 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
1037 * which is selected by the (nonstandard and therefore
1038 * capital) letter 'U' in the option string.
1039 * It causes the quantifiers to be ungreedy by default.
1040 * Appending a ? turns back to greedy (!).
1042 * - Added a new interceptor ijb-send-banner, which
1043 * sends back the "Junkbuster" gif. Without imagelist or
1044 * MSIE detection support, or if tinygif = 1, or the
1045 * URL isn't recognized as an imageurl, a lame HTML
1046 * explanation is sent instead.
1048 * - Added new feature, which permits blocking remote
1049 * script redirects and firing back a local redirect
1051 * The feature is conditionally compiled, i.e. it
1052 * can be disabled with --disable-fast-redirects,
1053 * plus it must be activated by a "fast-redirects"
1054 * line in the config file, has its own log level
1055 * and of course wants to be displayed by show-proxy-args
1056 * Note: Boy, all the #ifdefs in 1001 locations and
1057 * all the fumbling with configure.in and acconfig.h
1058 * were *way* more work than the feature itself :-(
1060 * - Because a generic redirect template was needed for
1061 * this, tinygif = 3 now uses the same.
1063 * - Moved GIFs, and other static HTTP response templates
1066 * - Some minor fixes
1068 * - Removed some >400 CRs again (Jon, you really worked
1071 * Revision 1.4 2001/05/21 19:34:01 jongfoster
1072 * Made failure to bind() a fatal error.
1074 * Revision 1.3 2001/05/20 01:21:20 jongfoster
1075 * Version 2.9.4 checkin.
1076 * - Merged popupfile and cookiefile, and added control over PCRS
1077 * filtering, in new "permissionsfile".
1078 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
1079 * file error you now get a message box (in the Win32 GUI) rather
1080 * than the program exiting with no explanation.
1081 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
1083 * - Removed tabs from "config"
1084 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
1085 * - Bumped up version number.
1087 * Revision 1.2 2001/05/17 22:34:44 oes
1088 * - Added hint on GIF char array generation to jcc.c
1089 * - Cleaned CRLF's from the sources and related files
1090 * - Repaired logging for REF and FRC
1092 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
1093 * Initial import of version 2.9.3 source tree
1096 *********************************************************************/
1102 #include <sys/types.h>
1111 # ifndef FEATURE_PTHREAD
1115 # include <windows.h>
1116 # include <process.h>
1117 # endif /* ndef FEATURE_PTHREAD */
1120 # ifndef _WIN_CONSOLE
1121 # include "w32log.h"
1122 # endif /* ndef _WIN_CONSOLE */
1123 # include "w32svrapi.h"
1125 #else /* ifndef _WIN32 */
1127 # if !defined (__OS2__)
1128 # include <unistd.h>
1129 # include <sys/wait.h>
1130 # endif /* ndef __OS2__ */
1131 # include <sys/time.h>
1132 # include <sys/stat.h>
1133 # include <sys/ioctl.h>
1136 #include <sys/termios.h>
1144 # include <signal.h>
1147 # include <socket.h> /* BeOS has select() for sockets only. */
1148 # include <OS.h> /* declarations for threads and stuff. */
1151 # if defined(__EMX__) || defined(__OS2__)
1152 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
1157 #define bzero(B,N) memset(B,0x00,n)
1161 # include <select.h>
1166 #include "project.h"
1169 #include "filters.h"
1170 #include "loaders.h"
1171 #include "parsers.h"
1172 #include "miscutil.h"
1174 #include "jbsockets.h"
1175 #include "gateway.h"
1176 #include "actions.h"
1178 #include "loadcfg.h"
1179 #include "urlmatch.h"
1181 const char jcc_h_rcs[] = JCC_H_VERSION;
1182 const char project_h_rcs[] = PROJECT_H_VERSION;
1185 struct client_state clients[1];
1186 struct file_list files[1];
1188 #ifdef FEATURE_STATISTICS
1189 int urls_read = 0; /* total nr of urls read inc rejected */
1190 int urls_rejected = 0; /* total nr of urls rejected */
1191 #endif /* def FEATURE_STATISTICS */
1193 #ifdef FEATURE_GRACEFUL_TERMINATION
1194 int g_terminate = 0;
1197 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1198 static void sig_handler(int the_signal);
1200 static int client_protocol_is_unsupported(const struct client_state *csp, char *req);
1201 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
1202 static jb_err get_server_headers(struct client_state *csp);
1203 static const char *crunch_reason(const struct http_response *rsp);
1204 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp);
1205 static char *get_request_line(struct client_state *csp);
1206 static jb_err receive_client_request(struct client_state *csp);
1207 static jb_err parse_client_request(struct client_state *csp);
1208 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
1209 static jb_err change_request_destination(struct client_state *csp);
1210 static void chat(struct client_state *csp);
1211 static void serve(struct client_state *csp);
1212 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1213 static void usage(const char *myname);
1215 static void initialize_mutexes(void);
1216 static jb_socket bind_port_helper(struct configuration_spec *config);
1217 static void listen_loop(void);
1220 void serve(struct client_state *csp);
1221 #else /* ifndef AMIGA */
1222 static void serve(struct client_state *csp);
1223 #endif /* def AMIGA */
1226 static int32 server_thread(void *data);
1227 #endif /* def __BEOS__ */
1230 #define sleep(N) Sleep(((N) * 1000))
1234 #define sleep(N) DosSleep(((N) * 100))
1237 #ifdef MUTEX_LOCKS_AVAILABLE
1239 * XXX: Does the locking stuff really belong in this file?
1241 privoxy_mutex_t log_mutex;
1242 privoxy_mutex_t log_init_mutex;
1243 privoxy_mutex_t connection_reuse_mutex;
1245 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
1246 privoxy_mutex_t resolver_mutex;
1247 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
1249 #ifndef HAVE_GMTIME_R
1250 privoxy_mutex_t gmtime_mutex;
1251 #endif /* ndef HAVE_GMTIME_R */
1253 #ifndef HAVE_LOCALTIME_R
1254 privoxy_mutex_t localtime_mutex;
1255 #endif /* ndef HAVE_GMTIME_R */
1258 privoxy_mutex_t rand_mutex;
1259 #endif /* ndef HAVE_RANDOM */
1261 #endif /* def MUTEX_LOCKS_AVAILABLE */
1264 const char *basedir = NULL;
1265 const char *pidfile = NULL;
1266 static int received_hup_signal = 0;
1267 #endif /* defined unix */
1269 /* HTTP snipplets. */
1270 static const char CSUCCEED[] =
1271 "HTTP/1.0 200 Connection established\r\n"
1272 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
1274 static const char CHEADER[] =
1275 "HTTP/1.0 400 Invalid header received from client\r\n"
1276 "Proxy-Agent: Privoxy " VERSION "\r\n"
1277 "Content-Type: text/plain\r\n"
1278 "Connection: close\r\n\r\n"
1279 "Invalid header received from client.\r\n";
1281 static const char FTP_RESPONSE[] =
1282 "HTTP/1.0 400 Invalid request received from client\r\n"
1283 "Content-Type: text/plain\r\n"
1284 "Connection: close\r\n\r\n"
1285 "Invalid request. Privoxy doesn't support FTP.\r\n";
1287 static const char GOPHER_RESPONSE[] =
1288 "HTTP/1.0 400 Invalid request received from client\r\n"
1289 "Content-Type: text/plain\r\n"
1290 "Connection: close\r\n\r\n"
1291 "Invalid request. Privoxy doesn't support gopher.\r\n";
1293 /* XXX: should be a template */
1294 static const char MISSING_DESTINATION_RESPONSE[] =
1295 "HTTP/1.0 400 Bad request received from client\r\n"
1296 "Proxy-Agent: Privoxy " VERSION "\r\n"
1297 "Content-Type: text/plain\r\n"
1298 "Connection: close\r\n\r\n"
1299 "Bad request. Privoxy was unable to extract the destination.\r\n";
1301 /* XXX: should be a template */
1302 static const char NO_SERVER_DATA_RESPONSE[] =
1303 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1304 "Proxy-Agent: Privoxy " VERSION "\r\n"
1305 "Content-Type: text/plain\r\n"
1306 "Connection: close\r\n\r\n"
1307 "Empty server or forwarder response.\r\n"
1308 "The connection has been closed but Privoxy didn't receive any data.\r\n";
1310 /* XXX: should be a template */
1311 static const char INVALID_SERVER_HEADERS_RESPONSE[] =
1312 "HTTP/1.0 502 Server or forwarder response invalid\r\n"
1313 "Proxy-Agent: Privoxy " VERSION "\r\n"
1314 "Content-Type: text/plain\r\n"
1315 "Connection: close\r\n\r\n"
1316 "Bad response. The server or forwarder response doesn't look like HTTP.\r\n";
1319 /* XXX: should be a template */
1320 static const char NULL_BYTE_RESPONSE[] =
1321 "HTTP/1.0 400 Bad request received from client\r\n"
1322 "Proxy-Agent: Privoxy " VERSION "\r\n"
1323 "Content-Type: text/plain\r\n"
1324 "Connection: close\r\n\r\n"
1325 "Bad request. Null byte(s) before end of request.\r\n";
1328 /* XXX: should be a template */
1329 static const char MESSED_UP_REQUEST_RESPONSE[] =
1330 "HTTP/1.0 400 Malformed request after rewriting\r\n"
1331 "Proxy-Agent: Privoxy " VERSION "\r\n"
1332 "Content-Type: text/plain\r\n"
1333 "Connection: close\r\n\r\n"
1334 "Bad request. Messed up with header filters.\r\n";
1336 /* A function to crunch a response */
1337 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
1339 /* Crunch function flags */
1340 #define CF_NO_FLAGS 0
1341 /* Cruncher applies to forced requests as well */
1342 #define CF_IGNORE_FORCE 1
1343 /* Crunched requests are counted for the block statistics */
1344 #define CF_COUNT_AS_REJECT 2
1346 /* A crunch function and its flags */
1349 const crunch_func_ptr cruncher;
1353 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
1355 /* Complete list of cruncher functions */
1356 static const struct cruncher crunchers_all[] = {
1357 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
1358 { block_url, CF_COUNT_AS_REJECT },
1359 #ifdef FEATURE_TRUST
1360 { trust_url, CF_COUNT_AS_REJECT },
1361 #endif /* def FEATURE_TRUST */
1362 { redirect_url, CF_NO_FLAGS },
1363 { dispatch_cgi, CF_IGNORE_FORCE},
1367 /* Light version, used after tags are applied */
1368 static const struct cruncher crunchers_light[] = {
1369 { block_url, CF_COUNT_AS_REJECT },
1370 { redirect_url, CF_NO_FLAGS },
1376 * XXX: Don't we really mean
1382 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1383 /*********************************************************************
1385 * Function : sig_handler
1387 * Description : Signal handler for different signals.
1388 * Exit gracefully on TERM and INT
1389 * or set a flag that will cause the errlog
1390 * to be reopened by the main thread on HUP.
1393 * 1 : the_signal = the signal cause this function to call
1397 *********************************************************************/
1398 static void sig_handler(int the_signal)
1404 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1416 received_hup_signal = 1;
1422 * We shouldn't be here, unless we catch signals
1423 * in main() that we can't handle here!
1425 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1433 /*********************************************************************
1435 * Function : client_protocol_is_unsupported
1437 * Description : Checks if the client used a known unsupported
1438 * protocol and deals with it by sending an error
1442 * 1 : csp = Current client state (buffers, headers, etc...)
1443 * 2 : req = the first request line send by the client
1445 * Returns : TRUE if an error response has been generated, or
1446 * FALSE if the request doesn't look invalid.
1448 *********************************************************************/
1449 static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1452 * If it's a FTP or gopher request, we don't support it.
1454 * These checks are better than nothing, but they might
1455 * not work in all configurations and some clients might
1456 * have problems digesting the answer.
1458 * They should, however, never cause more problems than
1459 * Privoxy's old behaviour (returning the misleading HTML
1462 * "Could not resolve http://(ftp|gopher)://example.org").
1464 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1466 const char *response = NULL;
1467 const char *protocol = NULL;
1469 if (!strncmpic(req, "GET ftp://", 10))
1471 response = FTP_RESPONSE;
1476 response = GOPHER_RESPONSE;
1477 protocol = "GOPHER";
1479 log_error(LOG_LEVEL_ERROR,
1480 "%s tried to use Privoxy as %s proxy: %s",
1481 csp->ip_addr_str, protocol, req);
1482 log_error(LOG_LEVEL_CLF,
1483 "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1485 write_socket(csp->cfd, response, strlen(response));
1494 /*********************************************************************
1496 * Function : get_request_destination_elsewhere
1498 * Description : If the client's request was redirected into
1499 * Privoxy without the client's knowledge,
1500 * the request line lacks the destination host.
1502 * This function tries to get it elsewhere,
1503 * provided accept-intercepted-requests is enabled.
1505 * "Elsewhere" currently only means "Host: header",
1506 * but in the future we may ask the redirecting
1507 * packet filter to look the destination up.
1509 * If the destination stays unknown, an error
1510 * response is send to the client and headers
1511 * are freed so that chat() can return directly.
1514 * 1 : csp = Current client state (buffers, headers, etc...)
1515 * 2 : headers = a header list
1517 * Returns : JB_ERR_OK if the destination is now known, or
1518 * JB_ERR_PARSE if it isn't.
1520 *********************************************************************/
1521 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1525 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1527 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1528 " Privoxy isn't configured to accept intercepted requests.",
1529 csp->ip_addr_str, csp->http->cmd);
1530 /* XXX: Use correct size */
1531 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1532 csp->ip_addr_str, csp->http->cmd);
1534 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1535 destroy_list(headers);
1537 return JB_ERR_PARSE;
1539 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1541 /* Split the domain we just got for pattern matching */
1542 init_domain_components(csp->http);
1548 /* We can't work without destination. Go spread the news.*/
1550 req = list_to_text(headers);
1552 /* XXX: Use correct size */
1553 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1554 csp->ip_addr_str, csp->http->cmd);
1555 log_error(LOG_LEVEL_ERROR,
1556 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1557 csp->ip_addr_str, csp->http->cmd, req);
1560 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
1561 destroy_list(headers);
1563 return JB_ERR_PARSE;
1566 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1567 * to get the destination IP address, use it as host directly
1568 * or do a reverse DNS lookup first.
1573 /*********************************************************************
1575 * Function : get_server_headers
1577 * Description : Parses server headers in iob and fills them
1578 * into csp->headers so that they can later be
1582 * 1 : csp = Current client state (buffers, headers, etc...)
1584 * Returns : JB_ERR_OK if everything went fine, or
1585 * JB_ERR_PARSE if the headers were incomplete.
1587 *********************************************************************/
1588 static jb_err get_server_headers(struct client_state *csp)
1590 int continue_hack_in_da_house = 0;
1593 while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
1598 * continue hack in da house. Ignore the ending of
1599 * this head and continue enlisting header lines.
1600 * The reason is described below.
1602 enlist(csp->headers, "");
1603 continue_hack_in_da_house = 0;
1606 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1609 * It's a bodyless continue response, don't
1610 * stop header parsing after reaching its end.
1612 * As a result Privoxy will concatenate the
1613 * next response's head and parse and deliver
1614 * the headers as if they belonged to one request.
1616 * The client will separate them because of the
1617 * empty line between them.
1619 * XXX: What we're doing here is clearly against
1620 * the intended purpose of the continue header,
1621 * and under some conditions (HTTP/1.0 client request)
1622 * it's a standard violation.
1624 * Anyway, "sort of against the spec" is preferable
1625 * to "always getting confused by Continue responses"
1626 * (Privoxy's behaviour before this hack was added)
1628 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1629 continue_hack_in_da_house = 1;
1631 else if (*header == '\0')
1634 * If the header is empty, but the Continue hack
1635 * isn't active, we can assume that we reached the
1636 * end of the buffer before we hit the end of the
1639 * Inform the caller an let it decide how to handle it.
1641 return JB_ERR_PARSE;
1644 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1647 * XXX: Should we quit the request and return a
1648 * out of memory error page instead?
1650 log_error(LOG_LEVEL_ERROR,
1651 "Out of memory while enlisting server headers. %s lost.",
1661 /*********************************************************************
1663 * Function : crunch_reason
1665 * Description : Translates the crunch reason code into a string.
1668 * 1 : rsp = a http_response
1670 * Returns : A string with the crunch reason or an error description.
1672 *********************************************************************/
1673 static const char *crunch_reason(const struct http_response *rsp)
1675 char * reason = NULL;
1677 assert(rsp != NULL);
1680 return "Internal error while searching for crunch reason";
1683 switch (rsp->reason)
1685 case RSP_REASON_UNSUPPORTED:
1686 reason = "Unsupported HTTP feature";
1688 case RSP_REASON_BLOCKED:
1691 case RSP_REASON_UNTRUSTED:
1692 reason = "Untrusted";
1694 case RSP_REASON_REDIRECTED:
1695 reason = "Redirected";
1697 case RSP_REASON_CGI_CALL:
1698 reason = "CGI Call";
1700 case RSP_REASON_NO_SUCH_DOMAIN:
1701 reason = "DNS failure";
1703 case RSP_REASON_FORWARDING_FAILED:
1704 reason = "Forwarding failed";
1706 case RSP_REASON_CONNECT_FAILED:
1707 reason = "Connection failure";
1709 case RSP_REASON_OUT_OF_MEMORY:
1710 reason = "Out of memory (may mask other reasons)";
1713 reason = "No reason recorded";
1721 /*********************************************************************
1723 * Function : send_crunch_response
1725 * Description : Delivers already prepared response for
1726 * intercepted requests, logs the interception
1727 * and frees the response.
1730 * 1 : csp = Current client state (buffers, headers, etc...)
1731 * 1 : rsp = Fully prepared response. Will be freed on exit.
1733 * Returns : Nothing.
1735 *********************************************************************/
1736 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp)
1738 const struct http_request *http = csp->http;
1739 char status_code[4];
1741 assert(rsp != NULL);
1742 assert(rsp->head != NULL);
1747 * Not supposed to happen. If it does
1748 * anyway, treat it as an unknown error.
1750 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1751 /* return code doesn't matter */
1756 /* If rsp is still NULL, we have serious internal problems. */
1757 log_error(LOG_LEVEL_FATAL,
1758 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1762 * Extract the status code from the actual head
1763 * that was send to the client. It is the only
1764 * way to get it right for all requests, including
1765 * the fixed ones for out-of-memory problems.
1767 * A head starts like this: 'HTTP/1.1 200...'
1771 status_code[0] = rsp->head[9];
1772 status_code[1] = rsp->head[10];
1773 status_code[2] = rsp->head[11];
1774 status_code[3] = '\0';
1776 /* Write the answer to the client */
1777 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1778 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1780 /* There is nothing we can do about it. */
1781 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1784 /* Log that the request was crunched and why. */
1785 log_error(LOG_LEVEL_GPC, "%s%s crunch! (%s)",
1786 http->hostport, http->path, crunch_reason(rsp));
1787 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %d",
1788 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1790 /* Clean up and return */
1791 if (cgi_error_memory() != rsp)
1793 free_http_response(rsp);
1800 /*********************************************************************
1802 * Function : request_contains_null_bytes
1804 * Description : Checks for NULL bytes in the request and sends
1805 * an error message to the client if any were found.
1807 * XXX: currently not used, see comment in chat().
1810 * 1 : csp = Current client state (buffers, headers, etc...)
1811 * 2 : buf = Data from the client's request to check.
1812 * 3 : len = The data length.
1814 * Returns : TRUE if the request contained one or more NULL bytes, or
1817 *********************************************************************/
1818 static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1820 size_t c_len; /* Request lenght when treated as C string */
1822 c_len = strlen(buf);
1827 * Null byte(s) found. Log the request,
1828 * return an error response and hang up.
1830 size_t tmp_len = c_len;
1835 * Replace NULL byte(s) with '°' characters
1836 * so the request can be logged as string.
1837 * XXX: Is there a better replacement character?
1840 tmp_len += strlen(buf+tmp_len);
1841 } while (tmp_len < len);
1843 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1844 "(length=%d, strlen=%d).", csp->ip_addr_str, len, c_len);
1845 log_error(LOG_LEVEL_HEADER,
1846 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1848 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
1850 /* XXX: Log correct size */
1851 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1861 /*********************************************************************
1863 * Function : crunch_response_triggered
1865 * Description : Checks if the request has to be crunched,
1866 * and delivers the crunch response if necessary.
1869 * 1 : csp = Current client state (buffers, headers, etc...)
1870 * 2 : crunchers = list of cruncher functions to run
1872 * Returns : TRUE if the request was answered with a crunch response
1875 *********************************************************************/
1876 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
1878 struct http_response *rsp = NULL;
1879 const struct cruncher *c;
1882 * If CGI request crunching is disabled,
1883 * check the CGI dispatcher out of order to
1884 * prevent unintentional blocks or redirects.
1886 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
1887 && (NULL != (rsp = dispatch_cgi(csp))))
1889 /* Deliver, log and free the interception response. */
1890 send_crunch_response(csp, rsp);
1894 for (c = crunchers; c->cruncher != NULL; c++)
1897 * Check the cruncher if either Privoxy is toggled
1898 * on and the request isn't forced, or if the cruncher
1899 * applies to forced requests as well.
1901 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
1902 !(csp->flags & CSP_FLAG_FORCED)) ||
1903 (c->flags & CF_IGNORE_FORCE))
1905 rsp = c->cruncher(csp);
1908 /* Deliver, log and free the interception response. */
1909 send_crunch_response(csp, rsp);
1910 #ifdef FEATURE_STATISTICS
1911 if (c->flags & CF_COUNT_AS_REJECT)
1913 csp->flags |= CSP_FLAG_REJECTED;
1915 #endif /* def FEATURE_STATISTICS */
1926 /*********************************************************************
1928 * Function : build_request_line
1930 * Description : Builds the HTTP request line.
1932 * If a HTTP forwarder is used it expects the whole URL,
1933 * web servers only get the path.
1936 * 1 : csp = Current client state (buffers, headers, etc...)
1937 * 2 : fwd = The forwarding spec used for the request
1938 * XXX: Should use http->fwd instead.
1939 * 3 : request_line = The old request line which will be replaced.
1941 * Returns : Nothing. Terminates in case of memory problems.
1943 *********************************************************************/
1944 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
1946 struct http_request *http = csp->http;
1948 assert(http->ssl == 0);
1951 * Downgrade http version from 1.1 to 1.0
1952 * if +downgrade action applies.
1954 if ( (csp->action->flags & ACTION_DOWNGRADE)
1955 && (!strcmpic(http->ver, "HTTP/1.1")))
1958 http->ver = strdup("HTTP/1.0");
1960 if (http->ver == NULL)
1962 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1967 * Rebuild the request line.
1969 freez(*request_line);
1970 *request_line = strdup(http->gpc);
1971 string_append(request_line, " ");
1973 if (fwd->forward_host)
1975 string_append(request_line, http->url);
1979 string_append(request_line, http->path);
1981 string_append(request_line, " ");
1982 string_append(request_line, http->ver);
1984 if (*request_line == NULL)
1986 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1988 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
1992 /*********************************************************************
1994 * Function : change_request_destination
1996 * Description : Parse a (rewritten) request line and regenerate
1997 * the http request data.
2000 * 1 : csp = Current client state (buffers, headers, etc...)
2002 * Returns : Forwards the parse_http_request() return code.
2003 * Terminates in case of memory problems.
2005 *********************************************************************/
2006 static jb_err change_request_destination(struct client_state *csp)
2008 struct http_request *http = csp->http;
2011 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
2012 free_http_request(http);
2013 err = parse_http_request(csp->headers->first->str, http, csp);
2014 if (JB_ERR_OK != err)
2016 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
2017 jb_err_to_string(err));
2021 /* XXX: ocmd is a misleading name */
2022 http->ocmd = strdup(http->cmd);
2023 if (http->ocmd == NULL)
2025 log_error(LOG_LEVEL_FATAL,
2026 "Out of memory copying rewritten HTTP request line");
2034 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2035 /*********************************************************************
2037 * Function : server_response_is_complete
2039 * Description : Determines whether we should stop reading
2040 * from the server socket.
2043 * 1 : csp = Current client state (buffers, headers, etc...)
2044 * 2 : content_length = Length of content received so far.
2046 * Returns : TRUE if the response is complete,
2049 *********************************************************************/
2050 static int server_response_is_complete(struct client_state *csp, size_t content_length)
2052 int content_length_known = (csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
2054 if (!strcmpic(csp->http->gpc, "HEAD"))
2057 * "HEAD" implies no body, we are thus expecting
2058 * no content. XXX: incomplete "list" of methods?
2060 csp->expected_content_length = 0;
2061 content_length_known = TRUE;
2064 if (csp->http->status == 304)
2067 * Expect no body. XXX: incomplete "list" of status codes?
2069 csp->expected_content_length = 0;
2070 content_length_known = TRUE;
2073 return (content_length_known && ((0 == csp->expected_content_length)
2074 || (csp->expected_content_length <= content_length)));
2076 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2078 /*********************************************************************
2080 * Function : mark_server_socket_tainted
2082 * Description : Makes sure we don't reuse a server socket
2083 * (if we didn't read everything the server sent
2084 * us reusing the socket would lead to garbage).
2087 * 1 : csp = Current client state (buffers, headers, etc...)
2091 *********************************************************************/
2092 static void mark_server_socket_tainted(struct client_state *csp)
2094 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
2096 log_error(LOG_LEVEL_CONNECT, "Unsetting keep-alive flag.");
2097 csp->flags &= ~CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE;
2101 /*********************************************************************
2103 * Function : get_request_line
2105 * Description : Read the client request line.
2108 * 1 : csp = Current client state (buffers, headers, etc...)
2110 * Returns : Pointer to request line or NULL in case of errors.
2112 *********************************************************************/
2113 static char *get_request_line(struct client_state *csp)
2115 char buf[BUFFER_SIZE];
2116 char *request_line = NULL;
2119 memset(buf, 0, sizeof(buf));
2123 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2125 if (len <= 0) return NULL;
2128 * If there is no memory left for buffering the
2129 * request, there is nothing we can do but hang up
2131 if (add_to_iob(csp, buf, len))
2136 request_line = get_header(csp->iob);
2138 } while ((NULL != request_line) && ('\0' == *request_line));
2140 return request_line;
2145 /*********************************************************************
2147 * Function : receive_client_request
2149 * Description : Read the client's request (more precisely the
2150 * client headers) and answer it if necessary.
2152 * Note that since we're not using select() we could get
2153 * blocked here if a client connected, then didn't say
2157 * 1 : csp = Current client state (buffers, headers, etc...)
2159 * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
2161 *********************************************************************/
2162 static jb_err receive_client_request(struct client_state *csp)
2164 char buf[BUFFER_SIZE];
2167 struct http_request *http;
2171 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
2172 struct list header_list;
2173 struct list *headers = &header_list;
2177 memset(buf, 0, sizeof(buf));
2179 req = get_request_line(csp);
2181 if ((NULL != req) && ('\0' != *req))
2183 /* Request received. Validate and parse it. */
2185 /* Does the request line look invalid? */
2186 if (client_protocol_is_unsupported(csp, req))
2189 * Yes. The request has already been
2190 * answered with a error response, the buffers
2191 * were freed and we're done with chatting.
2193 return JB_ERR_PARSE;
2196 #ifdef FEATURE_FORCE_LOAD
2198 * If this request contains the FORCE_PREFIX and blocks
2199 * aren't enforced, get rid of it and set the force flag.
2201 if (strstr(req, FORCE_PREFIX))
2203 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
2205 log_error(LOG_LEVEL_FORCE,
2206 "Ignored force prefix in request: \"%s\".", req);
2210 strclean(req, FORCE_PREFIX);
2211 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
2212 csp->flags |= CSP_FLAG_FORCED;
2215 #endif /* def FEATURE_FORCE_LOAD */
2217 err = parse_http_request(req, http, csp);
2218 if (JB_ERR_OK != err)
2220 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", jb_err_to_string(err));
2226 if (http->cmd == NULL)
2228 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
2229 /* XXX: Use correct size */
2230 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2231 log_error(LOG_LEVEL_ERROR, "Invalid header received from %s.", csp->ip_addr_str);
2233 free_http_request(http);
2234 return JB_ERR_PARSE;
2237 /* grab the rest of the client's headers */
2241 p = get_header(csp->iob);
2245 /* There are no additional headers to read. */
2252 * We didn't receive a complete header
2253 * line yet, get the rest of it.
2255 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2258 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
2259 destroy_list(headers);
2260 return JB_ERR_PARSE;
2263 if (add_to_iob(csp, buf, len))
2266 * If there is no memory left for buffering the
2267 * request, there is nothing we can do but hang up
2269 destroy_list(headers);
2270 return JB_ERR_MEMORY;
2276 * We were able to read a complete
2277 * header and can finaly enlist it.
2284 if (http->host == NULL)
2287 * If we still don't know the request destination,
2288 * the request is invalid or the client uses
2289 * Privoxy without its knowledge.
2291 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
2294 * Our attempts to get the request destination
2295 * elsewhere failed or Privoxy is configured
2296 * to only accept proxy requests.
2298 * An error response has already been send
2299 * and we're done here.
2301 return JB_ERR_PARSE;
2306 * Determine the actions for this URL
2308 #ifdef FEATURE_TOGGLE
2309 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
2311 /* Most compatible set of actions (i.e. none) */
2312 init_current_action(csp->action);
2315 #endif /* ndef FEATURE_TOGGLE */
2317 get_url_actions(csp, http);
2321 * Save a copy of the original request for logging
2323 http->ocmd = strdup(http->cmd);
2324 if (http->ocmd == NULL)
2326 log_error(LOG_LEVEL_FATAL,
2327 "Out of memory copying HTTP request line");
2329 enlist(csp->headers, http->cmd);
2331 /* Append the previously read headers */
2332 list_append_list_unique(csp->headers, headers);
2333 destroy_list(headers);
2340 /*********************************************************************
2342 * Function : parse_client_request
2344 * Description : Parses the client's request and decides what to do
2347 * Note that since we're not using select() we could get
2348 * blocked here if a client connected, then didn't say
2352 * 1 : csp = Current client state (buffers, headers, etc...)
2354 * Returns : JB_ERR_OK or JB_ERR_PARSE
2356 *********************************************************************/
2357 static jb_err parse_client_request(struct client_state *csp)
2359 struct http_request *http = csp->http;
2362 err = sed(csp, FILTER_CLIENT_HEADERS);
2363 if (JB_ERR_OK != err)
2365 /* XXX: Should be handled in sed(). */
2366 assert(err == JB_ERR_PARSE);
2367 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers.");
2369 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2371 /* Check request line for rewrites. */
2372 if ((NULL == csp->headers->first->str)
2373 || (strcmp(http->cmd, csp->headers->first->str) &&
2374 (JB_ERR_OK != change_request_destination(csp))))
2377 * A header filter broke the request line - bail out.
2379 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
2380 /* XXX: Use correct size */
2381 log_error(LOG_LEVEL_CLF,
2382 "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
2383 log_error(LOG_LEVEL_ERROR,
2384 "Invalid request line after applying header filters.");
2385 free_http_request(http);
2387 return JB_ERR_PARSE;
2395 /*********************************************************************
2399 * Description : Once a connection to the client has been accepted,
2400 * this function is called (via serve()) to handle the
2401 * main business of the communication. When this
2402 * function returns, the caller must close the client
2405 * FIXME: chat is nearly thousand lines long.
2409 * 1 : csp = Current client state (buffers, headers, etc...)
2411 * Returns : Nothing.
2413 *********************************************************************/
2414 static void chat(struct client_state *csp)
2416 char buf[BUFFER_SIZE];
2423 int ms_iis5_hack = 0;
2424 size_t byte_count = 0;
2425 int forwarded_connect_retries = 0;
2426 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
2427 const struct forward_spec *fwd;
2428 struct http_request *http;
2429 int len; /* for buffer sizes (and negative error codes) */
2431 /* Function that does the content filtering for the current request */
2432 filter_function_ptr content_filter = NULL;
2434 /* Skeleton for HTTP response, if we should intercept the request */
2435 struct http_response *rsp;
2437 memset(buf, 0, sizeof(buf));
2441 if (receive_client_request(csp) != JB_ERR_OK)
2445 if (parse_client_request(csp) != JB_ERR_OK)
2450 /* decide how to route the HTTP request */
2451 fwd = forward_url(csp, http);
2454 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
2455 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2459 * build the http request to send to the server
2460 * we have to do one of the following:
2462 * create = use the original HTTP request to create a new
2463 * HTTP request that has either the path component
2464 * without the http://domainspec (w/path) or the
2465 * full orininal URL (w/url)
2466 * Note that the path and/or the HTTP version may
2467 * have been altered by now.
2469 * connect = Open a socket to the host:port of the server
2470 * and short-circuit server and client socket.
2472 * pass = Pass the request unchanged if forwarding a CONNECT
2473 * request to a parent proxy. Note that we'll be sending
2474 * the CFAIL message ourselves if connecting to the parent
2475 * fails, but we won't send a CSUCCEED message if it works,
2476 * since that would result in a double message (ours and the
2477 * parent's). After sending the request to the parent, we simply
2480 * here's the matrix:
2483 * +--------+--------+
2485 * 0 | create | connect|
2487 * Forwarding +--------+--------+
2489 * 1 | create | pass |
2491 * +--------+--------+
2495 if (http->ssl && connect_port_is_forbidden(csp))
2497 const char *acceptable_connect_ports =
2498 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
2499 assert(NULL != acceptable_connect_ports);
2500 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
2501 "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
2502 csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
2503 csp->action->flags |= ACTION_BLOCK;
2509 freez(csp->headers->first->str);
2510 build_request_line(csp, fwd, &csp->headers->first->str);
2513 hdr = list_to_text(csp->headers);
2516 /* FIXME Should handle error properly */
2517 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2521 * We have a request. Check if one of the crunchers wants it.
2523 if (crunch_response_triggered(csp, crunchers_all))
2526 * Yes. The client got the crunch response
2527 * and we are done here after cleaning up.
2530 list_remove_all(csp->headers);
2536 * The headers can't be removed earlier because
2537 * they were still needed for the referrer check
2538 * in case of CGI crunches.
2540 * XXX: Would it be worth to move the referrer check
2541 * into client_referrer() and set a flag if it's trusted?
2543 list_remove_all(csp->headers);
2545 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2547 if (fwd->forward_host)
2549 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2550 fwd->forward_host, fwd->forward_port, http->hostport);
2554 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2557 /* here we connect to the server, gateway, or the forwarder */
2559 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
2560 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2562 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
2563 forwarded_connect_retries, http->hostport);
2566 if (csp->sfd == JB_INVALID_SOCKET)
2568 if (fwd->type != SOCKS_NONE)
2571 rsp = error_response(csp, "forwarding-failed", errno);
2573 else if (errno == EINVAL)
2575 rsp = error_response(csp, "no-such-domain", errno);
2579 rsp = error_response(csp, "connect-failed", errno);
2580 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2584 /* Write the answer to the client */
2587 send_crunch_response(csp, rsp);
2594 if (fwd->forward_host || (http->ssl == 0))
2597 * Write the client's (modified) header to the server
2598 * (along with anything else that may be in the buffer)
2600 if (write_socket(csp->sfd, hdr, strlen(hdr))
2601 || (flush_socket(csp->sfd, csp->iob) < 0))
2603 log_error(LOG_LEVEL_CONNECT,
2604 "write header to: %s failed: %E", http->hostport);
2606 rsp = error_response(csp, "connect-failed", errno);
2609 send_crunch_response(csp, rsp);
2619 * We're running an SSL tunnel and we're not forwarding,
2620 * so just send the "connect succeeded" message to the
2621 * client, flush the rest, and get out of the way.
2623 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
2631 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2633 /* we're finished with the client's header */
2636 maxfd = (csp->cfd > csp->sfd) ? csp->cfd : csp->sfd;
2638 /* pass data between the client and server
2639 * until one or the other shuts down the connection.
2648 * FD_ZERO here seems to point to an errant macro which crashes.
2649 * So do this by hand for now...
2651 memset(&rfds,0x00,sizeof(fd_set));
2655 FD_SET(csp->cfd, &rfds);
2656 FD_SET(csp->sfd, &rfds);
2658 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2659 if (server_body && server_response_is_complete(csp, byte_count))
2661 log_error(LOG_LEVEL_CONNECT,
2662 "Done reading from server. Expected content length: %d. "
2663 "Actual content length: %d. Most recently received: %d.",
2664 csp->expected_content_length, byte_count, len);
2667 * XXX: should not jump around,
2668 * chat() is complicated enough already.
2672 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2674 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
2678 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2679 mark_server_socket_tainted(csp);
2684 * This is the body of the browser's request,
2685 * just read and write it.
2687 if (FD_ISSET(csp->cfd, &rfds))
2689 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2693 /* XXX: not sure if this is necessary. */
2694 mark_server_socket_tainted(csp);
2695 break; /* "game over, man" */
2698 if (write_socket(csp->sfd, buf, (size_t)len))
2700 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2701 mark_server_socket_tainted(csp);
2708 * The server wants to talk. It could be the header or the body.
2709 * If `hdr' is null, then it's the header otherwise it's the body.
2710 * FIXME: Does `hdr' really mean `host'? No.
2712 if (FD_ISSET(csp->sfd, &rfds))
2715 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2719 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2721 if (http->ssl && (fwd->forward_host == NULL))
2724 * Just hang up. We already confirmed the client's CONNECT
2725 * request with status code 200 and unencrypted content is
2726 * no longer welcome.
2728 log_error(LOG_LEVEL_ERROR,
2729 "CONNECT already confirmed. Unable to tell the client about the problem.");
2732 else if (byte_count)
2735 * Just hang up. We already transmitted the original headers
2736 * and parts of the original content and therefore missed the
2737 * chance to send an error message (without risking data corruption).
2739 * XXX: we could retry with a fancy range request here.
2741 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2742 "Unable to tell the client about the problem.");
2743 mark_server_socket_tainted(csp);
2747 rsp = error_response(csp, "connect-failed", errno);
2750 send_crunch_response(csp, rsp);
2756 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2757 if (csp->flags & CSP_FLAG_CHUNKED)
2759 if ((len > 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2761 /* XXX: this is a temporary hack */
2762 log_error(LOG_LEVEL_CONNECT,
2763 "Looks like we reached the end of the last chunk. "
2764 "We better stop reading.");
2765 csp->expected_content_length = byte_count + (size_t)len;
2766 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2770 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2773 * Add a trailing zero to let be able to use string operations.
2774 * XXX: do we still need this with filter_popups gone?
2779 * Normally, this would indicate that we've read
2780 * as much as the server has sent us and we can
2781 * close the client connection. However, Microsoft
2782 * in its wisdom has released IIS/5 with a bug that
2783 * prevents it from sending the trailing \r\n in
2784 * a 302 redirect header (and possibly other headers).
2785 * To work around this if we've haven't parsed
2786 * a full header we'll append a trailing \r\n
2787 * and see if this now generates a valid one.
2789 * This hack shouldn't have any impacts. If we've
2790 * already transmitted the header or if this is a
2791 * SSL connection, then we won't bother with this
2792 * hack. So we only work on partially received
2793 * headers. If we append a \r\n and this still
2794 * doesn't generate a valid header, then we won't
2795 * transmit anything to the client.
2800 if (server_body || http->ssl)
2803 * If we have been buffering up the document,
2804 * now is the time to apply content modification
2805 * and send the result to the client.
2809 p = execute_content_filter(csp, content_filter);
2811 * If the content filter fails, use the original
2812 * buffer and length.
2813 * (see p != NULL ? p : csp->iob->cur below)
2817 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2820 if (JB_ERR_OK != update_server_headers(csp))
2822 log_error(LOG_LEVEL_FATAL,
2823 "Failed to update server headers. after filtering.");
2826 hdr = list_to_text(csp->headers);
2829 /* FIXME Should handle error properly */
2830 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2833 if (write_socket(csp->cfd, hdr, strlen(hdr))
2834 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
2836 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2839 mark_server_socket_tainted(csp);
2847 break; /* "game over, man" */
2851 * This is NOT the body, so
2852 * Let's pretend the server just sent us a blank line.
2854 snprintf(buf, sizeof(buf), "\r\n");
2855 len = (int)strlen(buf);
2858 * Now, let the normal header parsing algorithm below do its
2859 * job. If it fails, we'll exit instead of continuing.
2866 * If this is an SSL connection or we're in the body
2867 * of the server document, just write it to the client,
2868 * unless we need to buffer the body for later content-filtering
2870 if (server_body || http->ssl)
2875 * If there is no memory left for buffering the content, or the buffer limit
2876 * has been reached, switch to non-filtering mode, i.e. make & write the
2877 * header, flush the iob and buf, and get out of the way.
2879 if (add_to_iob(csp, buf, len))
2884 log_error(LOG_LEVEL_INFO,
2885 "Flushing header and buffers. Stepping back from filtering.");
2887 hdr = list_to_text(csp->headers);
2891 * Memory is too tight to even generate the header.
2892 * Send our static "Out-of-memory" page.
2894 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2895 rsp = cgi_error_memory();
2896 send_crunch_response(csp, rsp);
2897 mark_server_socket_tainted(csp);
2900 hdrlen = strlen(hdr);
2902 if (write_socket(csp->cfd, hdr, hdrlen)
2903 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
2904 || (write_socket(csp->cfd, buf, (size_t)len)))
2906 log_error(LOG_LEVEL_CONNECT,
2907 "Flush header and buffers to client failed: %E");
2909 mark_server_socket_tainted(csp);
2914 * Reset the byte_count to the amount of bytes
2915 * we just flushed. len will be added a few lines below,
2916 * hdrlen doesn't matter for LOG_LEVEL_CLF.
2918 byte_count = (size_t)flushed;
2920 content_filter = NULL;
2926 if (write_socket(csp->cfd, buf, (size_t)len))
2928 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2929 mark_server_socket_tainted(csp);
2933 byte_count += (size_t)len;
2938 const char *header_start;
2940 * We're still looking for the end of the server's header.
2941 * Buffer up the data we just read. If that fails, there's
2942 * little we can do but send our static out-of-memory page.
2944 if (add_to_iob(csp, buf, len))
2946 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2947 rsp = cgi_error_memory();
2948 send_crunch_response(csp, rsp);
2949 mark_server_socket_tainted(csp);
2953 header_start = csp->iob->cur;
2955 /* Convert iob into something sed() can digest */
2956 if (JB_ERR_PARSE == get_server_headers(csp))
2961 * Well, we tried our MS IIS/5 hack and it didn't work.
2962 * The header is incomplete and there isn't anything
2963 * we can do about it.
2965 log_error(LOG_LEVEL_INFO,
2966 "MS IIS5 hack didn't produce valid headers.");
2972 * Since we have to wait for more from the server before
2973 * we can parse the headers we just continue here.
2979 /* Did we actually get anything? */
2980 if (NULL == csp->headers->first)
2982 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
2983 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2984 write_socket(csp->cfd, NO_SERVER_DATA_RESPONSE, strlen(NO_SERVER_DATA_RESPONSE));
2985 free_http_request(http);
2986 mark_server_socket_tainted(csp);
2990 assert(csp->headers->first->str);
2992 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
2993 strncmpic(csp->headers->first->str, "ICY", 3))
2996 * It doesn't look like a HTTP (or Shoutcast) response:
2997 * tell the client and log the problem.
2999 if (strlen(csp->headers->first->str) > 30)
3001 csp->headers->first->str[30] = '\0';
3003 log_error(LOG_LEVEL_ERROR,
3004 "Invalid server or forwarder response. Starts with: %s",
3005 csp->headers->first->str);
3006 log_error(LOG_LEVEL_CLF,
3007 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3008 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
3009 strlen(INVALID_SERVER_HEADERS_RESPONSE));
3010 free_http_request(http);
3011 mark_server_socket_tainted(csp);
3016 * We have now received the entire server header,
3017 * filter it and send the result to the client
3019 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
3021 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
3023 hdr = list_to_text(csp->headers);
3026 /* FIXME Should handle error properly */
3027 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3030 if (crunch_response_triggered(csp, crunchers_light))
3033 * One of the tags created by a server-header
3034 * tagger triggered a crunch. We already
3035 * delivered the crunch response to the client
3036 * and are done here after cleaning up.
3039 mark_server_socket_tainted(csp);
3042 /* Buffer and pcrs filter this if appropriate. */
3044 if (!http->ssl) /* We talk plaintext */
3046 content_filter = get_filter_function(csp);
3049 * Only write if we're not buffering for content modification
3051 if (!content_filter)
3054 * Write the server's (modified) header to
3055 * the client (along with anything else that
3056 * may be in the buffer)
3059 if (write_socket(csp->cfd, hdr, strlen(hdr))
3060 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
3062 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
3065 * The write failed, so don't bother mentioning it
3066 * to the client... it probably can't hear us anyway.
3069 mark_server_socket_tainted(csp);
3073 byte_count += (size_t)len;
3078 * XXX: the header lenght should probably
3079 * be calculated by get_server_headers().
3081 int header_length = csp->iob->cur - header_start;
3082 assert(csp->iob->cur > header_start);
3083 byte_count += (size_t)(len - header_length);
3086 /* we're finished with the server's header */
3092 * If this was a MS IIS/5 hack then it means the server
3093 * has already closed the connection. Nothing more to read.
3098 log_error(LOG_LEVEL_INFO,
3099 "Closed server connection detected with MS IIS5 hack enabled.");
3105 mark_server_socket_tainted(csp);
3106 return; /* huh? we should never get here */
3109 if (csp->content_length == 0)
3112 * If Privoxy didn't recalculate the Content-Lenght,
3113 * byte_count is still correct.
3115 csp->content_length = byte_count;
3118 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3119 && (csp->expected_content_length != byte_count))
3121 log_error(LOG_LEVEL_ERROR,
3122 "Received %d bytes while expecting %d.",
3123 byte_count, csp->expected_content_length);
3124 mark_server_socket_tainted(csp);
3127 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
3128 csp->ip_addr_str, http->ocmd, csp->content_length);
3132 /*********************************************************************
3136 * Description : This is little more than chat. We only "serve" to
3137 * to close any socket that chat may have opened.
3140 * 1 : csp = Current client state (buffers, headers, etc...)
3144 *********************************************************************/
3146 void serve(struct client_state *csp)
3147 #else /* ifndef AMIGA */
3148 static void serve(struct client_state *csp)
3149 #endif /* def AMIGA */
3152 close_socket(csp->cfd);
3154 if (csp->sfd != JB_INVALID_SOCKET)
3156 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3157 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
3159 remember_connection(csp->sfd, csp->http, forward_url(csp, csp->http));
3163 forget_connection(csp->sfd);
3164 close_socket(csp->sfd);
3167 close_socket(csp->sfd);
3168 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3171 csp->flags &= ~CSP_FLAG_ACTIVE;
3177 /*********************************************************************
3179 * Function : server_thread
3181 * Description : We only exist to call `serve' in a threaded environment.
3184 * 1 : data = Current client state (buffers, headers, etc...)
3186 * Returns : Always 0.
3188 *********************************************************************/
3189 static int32 server_thread(void *data)
3191 serve((struct client_state *) data);
3198 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3199 /*********************************************************************
3203 * Description : Print usage info & exit.
3205 * Parameters : Pointer to argv[0] for identifying ourselves
3209 *********************************************************************/
3210 static void usage(const char *myname)
3212 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
3216 #endif /* defined(unix) */
3219 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
3220 #endif /* defined(unix) */
3221 "[--version] [configfile]\n"
3222 "Aborting\n", myname);
3227 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
3230 #ifdef MUTEX_LOCKS_AVAILABLE
3231 /*********************************************************************
3233 * Function : privoxy_mutex_lock
3235 * Description : Locks a mutex.
3238 * 1 : mutex = The mutex to lock.
3240 * Returns : Void. May exit in case of errors.
3242 *********************************************************************/
3243 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
3245 #ifdef FEATURE_PTHREAD
3246 int err = pthread_mutex_lock(mutex);
3249 if (mutex != &log_mutex)
3251 log_error(LOG_LEVEL_FATAL,
3252 "Mutex locking failed: %s.\n", strerror(err));
3257 EnterCriticalSection(mutex);
3258 #endif /* def FEATURE_PTHREAD */
3262 /*********************************************************************
3264 * Function : privoxy_mutex_unlock
3266 * Description : Unlocks a mutex.
3269 * 1 : mutex = The mutex to unlock.
3271 * Returns : Void. May exit in case of errors.
3273 *********************************************************************/
3274 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
3276 #ifdef FEATURE_PTHREAD
3277 int err = pthread_mutex_unlock(mutex);
3280 if (mutex != &log_mutex)
3282 log_error(LOG_LEVEL_FATAL,
3283 "Mutex unlocking failed: %s.\n", strerror(err));
3288 LeaveCriticalSection(mutex);
3289 #endif /* def FEATURE_PTHREAD */
3293 /*********************************************************************
3295 * Function : privoxy_mutex_init
3297 * Description : Prepares a mutex.
3300 * 1 : mutex = The mutex to initialize.
3302 * Returns : Void. May exit in case of errors.
3304 *********************************************************************/
3305 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
3307 #ifdef FEATURE_PTHREAD
3308 int err = pthread_mutex_init(mutex, 0);
3311 printf("Fatal error. Mutex initialization failed: %s.\n",
3316 InitializeCriticalSection(mutex);
3317 #endif /* def FEATURE_PTHREAD */
3319 #endif /* def MUTEX_LOCKS_AVAILABLE */
3321 /*********************************************************************
3323 * Function : initialize_mutexes
3325 * Description : Prepares mutexes if mutex support is available.
3329 * Returns : Void, exits in case of errors.
3331 *********************************************************************/
3332 static void initialize_mutexes(void)
3334 #ifdef MUTEX_LOCKS_AVAILABLE
3336 * Prepare global mutex semaphores
3338 privoxy_mutex_init(&log_mutex);
3339 privoxy_mutex_init(&log_init_mutex);
3340 privoxy_mutex_init(&connection_reuse_mutex);
3343 * XXX: The assumptions below are a bit naive
3344 * and can cause locks that aren't necessary.
3346 * For example older FreeBSD versions (< 6.x?)
3347 * have no gethostbyname_r, but gethostbyname is
3350 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
3351 privoxy_mutex_init(&resolver_mutex);
3352 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
3354 * XXX: should we use a single mutex for
3355 * localtime() and gmtime() as well?
3357 #ifndef HAVE_GMTIME_R
3358 privoxy_mutex_init(&gmtime_mutex);
3359 #endif /* ndef HAVE_GMTIME_R */
3361 #ifndef HAVE_LOCALTIME_R
3362 privoxy_mutex_init(&localtime_mutex);
3363 #endif /* ndef HAVE_GMTIME_R */
3366 privoxy_mutex_init(&rand_mutex);
3367 #endif /* ndef HAVE_RANDOM */
3368 #endif /* def MUTEX_LOCKS_AVAILABLE */
3372 /*********************************************************************
3376 * Description : Load the config file and start the listen loop.
3377 * This function is a lot more *sane* with the `load_config'
3378 * and `listen_loop' functions; although it stills does
3379 * a *little* too much for my taste.
3382 * 1 : argc = Number of parameters (including $0).
3383 * 2 : argv = Array of (char *)'s to the parameters.
3385 * Returns : 1 if : can't open config file, unrecognized directive,
3386 * stats requested in multi-thread mode, can't open the
3387 * log file, can't open the jar file, listen port is invalid,
3388 * any load fails, and can't bind port.
3390 * Else main never returns, the process must be signaled
3391 * to terminate execution. Or, on Windows, use the
3392 * "File", "Exit" menu option.
3394 *********************************************************************/
3396 int real_main(int argc, const char *argv[])
3398 int main(int argc, const char *argv[])
3402 unsigned int random_seed;
3404 struct passwd *pw = NULL;
3405 struct group *grp = NULL;
3408 char *pre_chroot_nslookup_to_load_resolver = NULL;
3415 #if !defined(_WIN32)
3423 * Parse the command line arguments
3425 * XXX: simply printing usage information in case of
3426 * invalid arguments isn't particularly user friendly.
3428 while (++argc_pos < argc)
3431 /* Check to see if the service must be installed or uninstalled */
3432 if (strncmp(argv[argc_pos], "--install", 9) == 0)
3434 const char *pName = argv[argc_pos] + 9;
3437 exit( (install_service(pName)) ? 0 : 1 );
3439 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
3441 const char *pName = argv[argc_pos] + 11;
3444 exit((uninstall_service(pName)) ? 0 : 1);
3446 else if (strcmp(argv[argc_pos], "--service" ) == 0)
3448 bRunAsService = TRUE;
3449 w32_set_service_cwd();
3450 atexit(w32_service_exit_notify);
3453 #endif /* defined(_WIN32) */
3456 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3458 if (strcmp(argv[argc_pos], "--help") == 0)
3463 else if(strcmp(argv[argc_pos], "--version") == 0)
3465 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
3471 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
3476 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
3478 if (++argc_pos == argc) usage(argv[0]);
3479 pidfile = strdup(argv[argc_pos]);
3482 else if (strcmp(argv[argc_pos], "--user" ) == 0)
3484 if (++argc_pos == argc) usage(argv[argc_pos]);
3486 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
3489 if (NULL == (grp = getgrnam(p)))
3491 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
3495 if (NULL == (pw = getpwnam(argv[argc_pos])))
3497 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
3500 if (p != NULL) *--p = '\0';
3503 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
3505 if (++argc_pos == argc) usage(argv[0]);
3506 pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
3509 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
3513 #endif /* defined(unix) */
3515 else if (argc_pos + 1 != argc)
3518 * This is neither the last command line
3519 * option, nor was it recognized before,
3520 * therefore it must be invalid.
3526 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3528 configfile = argv[argc_pos];
3531 } /* -END- while (more arguments) */
3534 if ( *configfile != '/' )
3536 char cwd[BUFFER_SIZE];
3538 size_t abs_file_size;
3540 /* make config-filename absolute here */
3541 if (NULL == getcwd(cwd, sizeof(cwd)))
3543 perror("failed to get current working directory");
3548 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3549 basedir = strdup(cwd);
3551 if (NULL == basedir ||
3552 NULL == (abs_file = malloc(abs_file_size)))
3554 perror("malloc failed");
3557 strlcpy(abs_file, basedir, abs_file_size);
3558 strlcat(abs_file, "/", abs_file_size );
3559 strlcat(abs_file, configfile, abs_file_size);
3560 configfile = abs_file;
3562 #endif /* defined unix */
3566 clients->next = NULL;
3568 /* XXX: factor out initialising after the next stable release. */
3571 #elif defined(_WIN32)
3575 /* Prepare mutexes if supported and necessary. */
3576 initialize_mutexes();
3578 /* Enable logging until further notice. */
3579 init_log_module(Argv[0]);
3581 random_seed = (unsigned int)time(NULL);
3583 srandom(random_seed);
3586 #endif /* ifdef HAVE_RANDOM */
3589 * Unix signal handling
3591 * Catch the abort, interrupt and terminate signals for a graceful exit
3592 * Catch the hangup signal so the errlog can be reopened.
3593 * Ignore the broken pipe signals (FIXME: Why?)
3595 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3598 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3599 const int ignored_signals[] = { SIGPIPE, 0 };
3601 for (idx = 0; catched_signals[idx] != 0; idx++)
3603 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3604 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3606 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3607 #endif /* ifdef sun */
3609 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3613 for (idx = 0; ignored_signals[idx] != 0; idx++)
3615 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3617 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3622 #else /* ifdef _WIN32 */
3623 # ifdef _WIN_CONSOLE
3625 * We *are* in a windows console app.
3626 * Print a verbose messages about FAQ's and such
3628 printf("%s", win32_blurb);
3629 # endif /* def _WIN_CONSOLE */
3630 #endif /* def _WIN32 */
3633 /* Initialize the CGI subsystem */
3634 cgi_init_error_messages();
3637 * If runnig on unix and without the --nodaemon
3638 * option, become a daemon. I.e. fork, detach
3639 * from tty and get process group leadership
3652 if ( pid < 0 ) /* error */
3657 else if ( pid != 0 ) /* parent */
3662 * must check for errors
3663 * child died due to missing files aso
3666 wpid = waitpid( pid, &status, WNOHANG );
3675 /* Should be more portable, but not as well tested */
3680 #else /* ndef __FreeBSD__ */
3682 #endif /* ndef __FreeBSD__ */
3683 fd = open("/dev/tty", O_RDONLY);
3686 /* no error check here */
3687 ioctl( fd, TIOCNOTTY,0 );
3692 * stderr (fd 2) will be closed later on, when the
3693 * log file has been parsed.
3700 } /* -END- if (!no_daemon) */
3703 * As soon as we have written the PID file, we can switch
3704 * to the user and group ID indicated by the --user option
3710 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3712 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3718 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3720 /* Read the time zone file from /etc before doing chroot. */
3722 if (NULL != pre_chroot_nslookup_to_load_resolver
3723 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3725 /* Initialize resolver library. */
3726 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3728 if (chroot(pw->pw_dir) < 0)
3730 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3734 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3737 if (setuid(pw->pw_uid))
3739 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3743 char putenv_dummy[64];
3745 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3746 if (putenv(putenv_dummy) != 0)
3748 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3751 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3752 if (putenv(putenv_dummy) != 0)
3754 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3760 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3763 #endif /* defined unix */
3766 /* This will be FALSE unless the command line specified --service
3770 /* Yup, so now we must attempt to establish a connection
3771 * with the service dispatcher. This will only work if this
3772 * process was launched by the service control manager to
3773 * actually run as a service. If this isn't the case, i've
3774 * known it take around 30 seconds or so for the call to return.
3777 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3778 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3780 /* Service has run, and at this point is now being stopped, so just return */
3785 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3787 /* An error occurred. Usually it's because --service was wrongly specified
3788 * and we were unable to connect to the Service Control Dispatcher because
3789 * it wasn't expecting us and is therefore not listening.
3791 * For now, just continue below to call the listen_loop function.
3794 #endif /* def _WIN32 */
3804 /*********************************************************************
3806 * Function : bind_port_helper
3808 * Description : Bind the listen port. Handles logging, and aborts
3812 * 1 : config = Privoxy configuration. Specifies port
3815 * Returns : Port that was opened.
3817 *********************************************************************/
3818 static jb_socket bind_port_helper(struct configuration_spec * config)
3823 if (config->haddr == NULL)
3825 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3830 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3831 config->hport, config->haddr);
3834 result = bind_port(config->haddr, config->hport, &bfd);
3841 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3842 "There may be another Privoxy or some other "
3843 "proxy running on port %d",
3844 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
3845 config->hport, config->hport);
3848 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3849 "The hostname is not resolvable",
3850 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3853 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
3854 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3857 /* shouldn't get here */
3858 return JB_INVALID_SOCKET;
3861 config->need_bind = 0;
3868 /* Without this simple workaround we get this compiler warning from _beginthread
3869 * warning C4028: formal parameter 1 different from declaration
3871 void w32_service_listen_loop(void *p)
3875 #endif /* def _WIN32 */
3878 /*********************************************************************
3880 * Function : listen_loop
3882 * Description : bind the listen port and enter a "FOREVER" listening loop.
3888 *********************************************************************/
3889 static void listen_loop(void)
3891 struct client_state *csp = NULL;
3893 struct configuration_spec * config;
3895 config = load_config();
3897 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3899 * XXX: Should be relocated once it no
3900 * longer needs to emit log messages.
3902 initialize_reusable_connections();
3903 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3905 bfd = bind_port_helper(config);
3907 #ifdef FEATURE_GRACEFUL_TERMINATION
3908 while (!g_terminate)
3913 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
3914 while (waitpid(-1, NULL, WNOHANG) > 0)
3916 /* zombie children */
3918 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
3921 * Free data that was used by died threads
3927 * Re-open the errlog after HUP signal
3929 if (received_hup_signal)
3931 if (NULL != config->logfile)
3933 init_error_log(Argv[0], config->logfile);
3935 received_hup_signal = 0;
3939 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
3941 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
3945 csp->flags |= CSP_FLAG_ACTIVE;
3946 csp->sfd = JB_INVALID_SOCKET;
3948 csp->config = config = load_config();
3950 if ( config->need_bind )
3953 * Since we were listening to the "old port", we will not see
3954 * a "listen" param change until the next IJB request. So, at
3955 * least 1 more request must be made for us to find the new
3956 * setting. I am simply closing the old socket and binding the
3959 * Which-ever is correct, we will serve 1 more page via the
3960 * old settings. This should probably be a "show-proxy-args"
3961 * request. This should not be a so common of an operation
3962 * that this will hurt people's feelings.
3967 bfd = bind_port_helper(config);
3970 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
3972 if (!accept_connection(csp, bfd))
3974 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
3987 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
3990 #ifdef FEATURE_TOGGLE
3991 if (global_toggle_state)
3992 #endif /* def FEATURE_TOGGLE */
3994 csp->flags |= CSP_FLAG_TOGGLED_ON;
3997 if (run_loader(csp))
3999 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
4000 /* Never get here - LOG_LEVEL_FATAL causes program exit */
4004 if (block_acl(NULL,csp))
4006 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
4007 close_socket(csp->cfd);
4011 #endif /* def FEATURE_ACL */
4013 /* add it to the list of clients */
4014 csp->next = clients->next;
4015 clients->next = csp;
4017 if (config->multi_threaded)
4021 /* this is a switch () statment in the C preprocessor - ugh */
4022 #undef SELECTED_ONE_OPTION
4024 /* Use Pthreads in preference to native code */
4025 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
4026 #define SELECTED_ONE_OPTION
4028 pthread_t the_thread;
4029 pthread_attr_t attrs;
4031 pthread_attr_init(&attrs);
4032 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
4033 errno = pthread_create(&the_thread, &attrs,
4034 (void * (*)(void *))serve, csp);
4035 child_id = errno ? -1 : 0;
4036 pthread_attr_destroy(&attrs);
4040 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
4041 #define SELECTED_ONE_OPTION
4042 child_id = _beginthread(
4043 (void (*)(void *))serve,
4048 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
4049 #define SELECTED_ONE_OPTION
4050 child_id = _beginthread(
4051 (void(* _Optlink)(void*))serve,
4057 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
4058 #define SELECTED_ONE_OPTION
4060 thread_id tid = spawn_thread
4061 (server_thread, "server", B_NORMAL_PRIORITY, csp);
4063 if ((tid >= 0) && (resume_thread(tid) == B_OK))
4065 child_id = (int) tid;
4074 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
4075 #define SELECTED_ONE_OPTION
4076 csp->cfd = ReleaseSocket(csp->cfd, -1);
4079 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4080 NP_Output, Output(),
4081 NP_CloseOutput, FALSE,
4082 NP_Name, (ULONG)"privoxy child",
4086 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4087 NP_Output, Output(),
4088 NP_CloseOutput, FALSE,
4089 NP_Name, (ULONG)"privoxy child",
4090 NP_StackSize, 200*1024,
4096 ((struct Task *)child_id)->tc_UserData = csp;
4097 Signal((struct Task *)child_id, SIGF_SINGLE);
4102 #if !defined(SELECTED_ONE_OPTION)
4105 /* This block is only needed when using fork().
4106 * When using threads, the server thread was
4107 * created and run by the call to _beginthread().
4109 if (child_id == 0) /* child */
4112 #ifdef FEATURE_TOGGLE
4113 int inherited_toggle_state = global_toggle_state;
4114 #endif /* def FEATURE_TOGGLE */
4119 * If we've been toggled or we've blocked the request, tell Mom
4122 #ifdef FEATURE_TOGGLE
4123 if (inherited_toggle_state != global_toggle_state)
4125 rc |= RC_FLAG_TOGGLED;
4127 #endif /* def FEATURE_TOGGLE */
4129 #ifdef FEATURE_STATISTICS
4130 if (csp->flags & CSP_FLAG_REJECTED)
4132 rc |= RC_FLAG_BLOCKED;
4134 #endif /* ndef FEATURE_STATISTICS */
4138 else if (child_id > 0) /* parent */
4140 /* in a fork()'d environment, the parent's
4141 * copy of the client socket and the CSP
4145 #if !defined(_WIN32) && !defined(__CYGWIN__)
4147 wait( &child_status );
4150 * Evaluate child's return code: If the child has
4151 * - been toggled, toggle ourselves
4152 * - blocked its request, bump up the stats counter
4155 #ifdef FEATURE_TOGGLE
4156 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
4158 global_toggle_state = !global_toggle_state;
4160 #endif /* def FEATURE_TOGGLE */
4162 #ifdef FEATURE_STATISTICS
4164 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
4168 #endif /* def FEATURE_STATISTICS */
4170 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
4171 close_socket(csp->cfd);
4172 csp->flags &= ~CSP_FLAG_ACTIVE;
4176 #undef SELECTED_ONE_OPTION
4177 /* end of cpp switch () */
4179 if (child_id < 0) /* failed */
4181 char buf[BUFFER_SIZE];
4183 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
4185 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
4187 write_socket(csp->cfd, buf, strlen(buf));
4188 close_socket(csp->cfd);
4189 csp->flags &= ~CSP_FLAG_ACTIVE;
4200 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
4202 /* Clean up. Aim: free all memory (no leaks) */
4203 #ifdef FEATURE_GRACEFUL_TERMINATION
4205 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
4207 unload_current_config_file();
4208 unload_current_actions_file();
4209 unload_current_re_filterfile();
4210 #ifdef FEATURE_TRUST
4211 unload_current_trust_file();
4214 if (config->multi_threaded)
4221 } while ((clients->next != NULL) && (--i > 0));
4225 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
4236 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
4237 /* Cleanup - remove taskbar icon etc. */
4242 #endif /* FEATURE_GRACEFUL_TERMINATION */