1 const char jcc_rcs[] = "$Id: jcc.c,v 1.203 2008/11/06 18:34:35 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 1.203 2008/11/06 18:34:35 fabiankeil
37 * Factor receive_client_request() and
38 * parse_client_request() out of chat().
40 * Revision 1.202 2008/11/02 18:40:34 fabiankeil
41 * If we received a different amount of data than we expected,
42 * log a warning and make sure the server socket isn't reused.
44 * Revision 1.201 2008/11/02 16:48:20 fabiankeil
45 * Revert revision 1.195 and try again.
47 * Revision 1.200 2008/10/26 16:53:18 fabiankeil
50 * Revision 1.199 2008/10/26 15:36:10 fabiankeil
51 * Remove two debug messages with LOG_LEVEL_INFO.
53 * Revision 1.198 2008/10/22 15:19:55 fabiankeil
54 * Once More, With Feeling: if there is no logfile
55 * because the user didn't specify one, we shouldn't
56 * call init_error_log() after receiving SIGHUP either.
58 * Revision 1.197 2008/10/20 17:02:40 fabiankeil
59 * If SIGHUP is received while we aren't running in daemon
60 * mode, calling init_error_log() would be a mistake.
62 * Revision 1.196 2008/10/16 09:16:41 fabiankeil
63 * - Fix two gcc44 conversion warnings.
64 * - Don't bother logging the last five bytes
67 * Revision 1.195 2008/10/13 16:04:37 fabiankeil
68 * Make sure we don't try to reuse tainted server sockets.
70 * Revision 1.194 2008/10/12 18:35:18 fabiankeil
71 * The last commit was a bit too ambitious, apparently the content
72 * length adjustment is only necessary if we aren't buffering.
74 * Revision 1.193 2008/10/12 15:57:35 fabiankeil
75 * Fix content length calculation if we read headers
76 * and the start of the body at once. Now that we have
77 * FEATURE_CONNECTION_KEEP_ALIVE, it actually matters.
79 * Revision 1.192 2008/10/11 18:19:14 fabiankeil
80 * Even more chat() cosmetics.
82 * Revision 1.191 2008/10/11 18:00:14 fabiankeil
83 * Reformat some comments in chat().
85 * Revision 1.190 2008/10/11 14:58:00 fabiankeil
86 * In case of chunk-encoded content, stop reading if
87 * the buffer looks like it ends with the last chunk.
89 * Revision 1.189 2008/10/11 09:53:00 fabiankeil
90 * Let server_response_is_complete() deal properly with
91 * content that is neither buffered nor read all at once.
93 * Revision 1.188 2008/10/09 18:21:41 fabiankeil
94 * Flush work-in-progress changes to keep outgoing connections
95 * alive where possible. Incomplete and mostly #ifdef'd out.
97 * Revision 1.187 2008/09/07 12:35:05 fabiankeil
98 * Add mutex lock support for _WIN32.
100 * Revision 1.186 2008/09/04 08:13:58 fabiankeil
101 * Prepare for critical sections on Windows by adding a
102 * layer of indirection before the pthread mutex functions.
104 * Revision 1.185 2008/08/30 12:03:07 fabiankeil
105 * Remove FEATURE_COOKIE_JAR.
107 * Revision 1.184 2008/08/22 15:34:45 fabiankeil
108 * - Silence LLVM/Clang complaint.
109 * - Make received_hup_signal static.
110 * - Hide definitions for basedir, pidfile and received_hup_signal
111 * from __EMX__ as they only seem to be used in case of #ifdef unix.
113 * Revision 1.183 2008/08/21 07:09:35 fabiankeil
114 * Accept Shoutcast responses again. Problem reported
115 * and fix suggested by Stefan in #2062860.
117 * Revision 1.182 2008/06/27 11:13:56 fabiankeil
118 * Fix possible NULL-pointer dereference reported
119 * by din_a4 in #2003937. Pointy hat to me.
121 * Revision 1.181 2008/05/21 15:47:15 fabiankeil
122 * Streamline sed()'s prototype and declare
123 * the header parse and add structures static.
125 * Revision 1.180 2008/05/21 15:26:32 fabiankeil
126 * - Mark csp as immutable for send_crunch_response().
127 * - Fix comment spelling.
129 * Revision 1.179 2008/05/20 20:13:32 fabiankeil
130 * Factor update_server_headers() out of sed(), ditch the
131 * first_run hack and make server_patterns_light static.
133 * Revision 1.178 2008/05/10 13:23:38 fabiankeil
134 * Don't provide get_header() with the whole client state
135 * structure when it only needs access to csp->iob.
137 * Revision 1.177 2008/05/10 11:51:12 fabiankeil
138 * Make the "read the rest of the headers" loop a bit more readable.
140 * Revision 1.176 2008/05/10 11:37:57 fabiankeil
141 * - Instead of logging when the IIS5 hack is enabled, log when it fails.
142 * - Remove useless comment.
144 * Revision 1.175 2008/05/09 18:53:59 fabiankeil
145 * Fix comment grammar.
147 * Revision 1.174 2008/05/07 18:05:53 fabiankeil
148 * Remove the pointless buffer in client_protocol_is_unsupported().
150 * Revision 1.173 2008/05/06 15:09:00 fabiankeil
151 * Least-effort fix for bug #1821930 (reported by Lee):
152 * If the response doesn't look like HTTP,
153 * tell the client and log the problem.
155 * Revision 1.172 2008/04/16 16:38:21 fabiankeil
156 * Don't pass the whole csp structure to flush_socket()
157 * when it only needs a file descriptor and a buffer.
159 * Revision 1.171 2008/03/27 18:27:25 fabiankeil
160 * Remove kill-popups action.
162 * Revision 1.170 2008/03/06 16:33:46 fabiankeil
163 * If limit-connect isn't used, don't limit CONNECT requests to port 443.
165 * Revision 1.169 2008/03/04 18:30:39 fabiankeil
166 * Remove the treat-forbidden-connects-like-blocks action. We now
167 * use the "blocked" page for forbidden CONNECT requests by default.
169 * Revision 1.168 2008/03/02 12:25:25 fabiankeil
170 * Also use shiny new connect_port_is_forbidden() in jcc.c.
172 * Revision 1.167 2008/02/23 16:57:12 fabiankeil
173 * Rename url_actions() to get_url_actions() and let it
174 * use the standard parameter ordering.
176 * Revision 1.166 2008/02/23 16:33:43 fabiankeil
177 * Let forward_url() use the standard parameter ordering
178 * and mark its second parameter immutable.
180 * Revision 1.165 2008/02/02 19:36:56 fabiankeil
181 * Remove the "Listening ... for local connections only" log message.
182 * Whether or not remote connections are able to reach Privoxy is up
183 * to the operating system.
185 * Revision 1.164 2007/12/16 18:32:46 fabiankeil
186 * Prevent the log messages for CONNECT requests to unacceptable
187 * ports from printing the limit-connect argument as [null] if
188 * limit-connect hasn't been explicitly enabled.
190 * Revision 1.163 2007/12/13 01:47:11 david__schmidt
191 * Make sure all console-mode apps get a usage() instance
193 * Revision 1.162 2007/12/06 17:54:57 fabiankeil
194 * Reword NO_SERVER_DATA_RESPONSE to make it harder
195 * to misunderstand what the message is all about.
197 * Revision 1.161 2007/12/04 19:44:22 fabiankeil
198 * Unbreak trustfile which previously didn't work without
199 * FEATURE_TOGGLE. Fixes BR#1843585, reported by Lee.
201 * Revision 1.160 2007/11/29 18:00:29 fabiankeil
202 * Plug memory leak. Spotted by Valgrind, triggered by
203 * Privoxy-Regression-Test feeding proxyfuzz.py.
205 * Revision 1.159 2007/11/24 14:34:09 fabiankeil
206 * In the HTTP snipplets, refer to the client as client.
208 * Revision 1.158 2007/11/11 16:44:17 fabiankeil
209 * Emit a log message when activating the MS IIS5 hack.
211 * Revision 1.157 2007/11/03 17:34:49 fabiankeil
212 * Log the "weak randomization factor" warning only
213 * once for mingw32 and provide some more details.
215 * Revision 1.156 2007/11/01 18:20:58 fabiankeil
216 * Initialize log module after initializing mutexes, future
217 * deadlocks in that code should now work cross-platform.
219 * Revision 1.155 2007/10/23 20:12:45 fabiankeil
220 * Fix first CSUCCEED line to end in \r\n as required by RFC1945.
221 * Reported by Bert van Leeuwen in BR#1818808.
223 * Revision 1.154 2007/10/19 17:00:08 fabiankeil
224 * Downgrade "Flushing header and buffers" message to LOG_LEVEL_INFO.
226 * Revision 1.153 2007/10/14 14:12:41 fabiankeil
227 * When in daemon mode, close stderr after the configuration file has been
228 * parsed the first time. If logfile isn't set, stop logging. Fixes BR#897436.
230 * Revision 1.152 2007/10/04 18:03:34 fabiankeil
231 * - Fix a crash when parsing invalid requests whose first header
232 * is rejected by get_header(). Regression (re?)introduced
233 * in r1.143 by yours truly.
234 * - Move ACTION_VANILLA_WAFER handling into parsers.c's
235 * client_cookie_adder() to make sure send-vanilla-wafer can be
236 * controlled through tags (and thus regression-tested).
238 * Revision 1.151 2007/09/29 10:21:16 fabiankeil
239 * - Move get_filter_function() from jcc.c to filters.c
240 * so the filter functions can be static.
241 * - Don't bother filtering body-less responses.
243 * Revision 1.150 2007/09/28 16:39:29 fabiankeil
244 * Execute content filters through execute_content_filter().
246 * Revision 1.149 2007/09/04 15:08:48 fabiankeil
247 * Initialize req to NULL to make sure it's defined if the
248 * first read_socket() call fails. Reported by icmp30.
250 * Revision 1.148 2007/08/26 16:47:13 fabiankeil
251 * Add Stephen Gildea's --pre-chroot-nslookup patch [#1276666],
252 * extensive comments moved to user manual.
254 * Revision 1.147 2007/08/25 14:42:40 fabiankeil
255 * Don't crash if a broken header filter wiped out the request line.
257 * Revision 1.146 2007/08/20 17:09:32 fabiankeil
258 * Fix byte_count calculation in case of flushes
259 * and don't parse the server headers a second time.
261 * Revision 1.145 2007/08/19 13:13:31 fabiankeil
262 * - If there's a connection problem after we already forwarded
263 * parts of the original content, just hang up. Fixes BR#1776724.
264 * - Fix warnings about unused code on mingw32.
265 * - In case of flushes, calculate the byte count
266 * less incorrectly (I think).
268 * Revision 1.144 2007/08/11 14:43:22 fabiankeil
269 * Add some more prototypes for static functions.
271 * Revision 1.143 2007/08/05 13:58:19 fabiankeil
272 * Comment out request_contains_null_bytes() until it's used again.
274 * Revision 1.142 2007/08/05 13:50:26 fabiankeil
275 * #1763173 from Stefan Huehner: s@const static@static const@
276 * and declare some more functions static.
278 * Revision 1.141 2007/08/04 09:56:23 fabiankeil
279 * - Log rejected CONNECT requests with LOG_LEVEL_INFO
280 * and explain why they were rejected in the first place.
281 * - Fix the LOG_LEVEL_CLF message for crunches of unallowed
282 * CONNECT requests. The request line was missing.
283 * - Add two more XXX reminders as we don't have enough already.
285 * Revision 1.140 2007/07/21 11:51:36 fabiankeil
286 * As Hal noticed, checking dispatch_cgi() as the last cruncher
287 * looks like a bug if CGI requests are blocked unintentionally,
288 * so don't do it unless the user enabled the new config option
289 * "allow-cgi-request-crunching".
291 * Revision 1.139 2007/07/14 07:46:41 fabiankeil
292 * - Allow to rewrite the request destination behind the client's back.
293 * - Turn the weird-looking unconditional for loop that
294 * reads the client request into a conditional while loop.
295 * Move the stuff that only runs once out of the loop.
296 * - Move parts of chat(), server_content_type() and the
297 * necessary stuff to fix BR#1750917 into get_filter_function().
299 * Revision 1.138 2007/06/03 18:45:18 fabiankeil
300 * Temporary workaround for BR#1730105.
302 * Revision 1.137 2007/06/01 18:16:36 fabiankeil
303 * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
304 * deadlocks and crashes on OpenBSD and possibly other OS with neither
305 * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
306 * Thanks to Ralf Horstmann for report and solution.
308 * Revision 1.136 2007/06/01 16:41:11 fabiankeil
309 * Add forward-override{} to change the forwarding settings through
310 * action sections. This is mainly interesting to forward different
311 * clients differently (for example based on User-Agent or request
314 * Revision 1.135 2007/05/24 17:03:50 fabiankeil
315 * - Let usage() mention the --chroot parameter.
316 * - Use read_socket() consistently and always leave
317 * the last buffer byte alone, even in cases where
318 * null termination (currently) doesn't matter.
320 * Revision 1.134 2007/05/16 14:59:46 fabiankeil
321 * - Fix config file loading on Unix if no config file is specified.
322 * Since r1.97 Privoxy would always interpret the last argument as
323 * config file, even if it's a valid command line option.
324 * - Abort in case of unrecognized command line options. Closes #1719696.
325 * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
326 * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
328 * Revision 1.133 2007/05/04 11:23:19 fabiankeil
329 * - Don't rerun crunchers that only depend on the request URL.
330 * - Don't count redirects and CGI requests as "blocked requests".
332 * Revision 1.132 2007/04/25 15:15:17 fabiankeil
333 * Support crunching based on tags created by server-header taggers.
335 * Revision 1.131 2007/04/22 13:24:50 fabiankeil
336 * Make HTTP snippets static (again). Add a Content-Type for those
337 * with content so the browser doesn't guess it based on the URL.
339 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
340 * Move crunching and request line rebuilding out of chat().
342 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
343 * Introduce tags as alternative way to specify which
344 * actions apply to a request. At the moment tags can be
345 * created based on client and server headers.
347 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
348 * Don't CLF-log CONNECT requests twice.
350 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
351 * Log the source address for ACL-related connection drops.
353 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
354 * New config option: enforce-blocks.
356 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
357 * - Move null byte check into separate function.
358 * - Don't confuse the client with error pages
359 * if a CONNECT request was already confirmed.
361 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
362 * Speed up NULL byte escaping and only log the complete
363 * NULL byte requests with header debugging enabled.
365 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
366 * Answer requests that contain NULL bytes with
367 * a custom response instead of waiting for more
368 * data until the client eventually hangs up.
370 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
371 * - Move delivery and logging of crunched responses
372 * from chat() into send_crunch_response().
373 * - Display the reason for generating http_responses.
374 * - Log the content length for LOG_LEVEL_CLF correctly
375 * (still incorrect for some fixed responses).
376 * - Reword an incorrect comment about
377 * treat-forbidden-connects-like-blocks violating
379 * - Add some log messages.
381 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
382 * Move mutex initialization into separate
383 * function and exit in case of errors.
385 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
386 * - Start to reduce chat()'s line count and move
387 * parts of it into separate functions.
388 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
390 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
391 * - Add Proxy-Agent header to HTTP snippets that are
392 * supposed to reach HTTP clients only.
393 * - Made a few CONNECT log messages more descriptive.
394 * - Catch completely empty server responses (as seen
395 * with Tor's fake ".noconnect" top level domain).
396 * - Use shiny new "forwarding-failed" template for socks errors.
398 * Revision 1.118 2007/01/07 07:43:43 joergs
399 * AmigaOS4 support added.
401 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
402 * Added config option accept-intercepted-requests
403 * and disabled it by default.
405 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
406 * Reverted parts of my last commit
407 * to keep error handling working.
409 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
410 * Fixed gcc43 conversion warnings.
412 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
413 * Fix -pedantic ISO C warning about converting
414 * from function pointer to object pointer.
416 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
417 * Silence compiler warning I introduced with my last commit.
419 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
420 * Mutex protect rand() if POSIX threading
421 * is used, warn the user if that's not possible
422 * and stop using it on _WIN32 where it could
425 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
426 * Don't prevent core dumps by catching SIGABRT.
427 * It's rude and makes debugging unreasonable painful.
429 * Revision 1.110 2006/12/13 14:52:53 etresoft
430 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
432 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
433 * Privoxy is now able to run as intercepting
434 * proxy in combination with any packet filter
435 * that does the port redirection. The destination
436 * is extracted from the "Host:" header which
437 * should be available for nearly all requests.
439 * Moved HTTP snipplets into jcc.c.
440 * Added error message for gopher proxy requests.
442 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
443 * Only unlink the pidfile if it's actually used.
445 * Change order of interception checks to make
446 * it possible to block or redirect requests for
449 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
450 * Make pthread mutex locking more generic. Instead of
451 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
452 * and use mutex locking unless there is an _r function
453 * available. Better safe than sorry.
455 * Fixes "./configure --disable-pthread" and should result
456 * in less threading-related problems on pthread-using platforms,
457 * but it still doesn't fix BR#1122404.
459 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
460 * Move pthread.h inclusion from jcc.c to jcc.h.
461 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
463 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
464 * Don't exit after receiving the second SIGHUP on Solaris.
466 * Fixes BR 1052235, but the same problem may exist on other
467 * systems. Once 3.0.6 is out we should use sigset()
468 * where available and see if it breaks anything.
470 * Revision 1.104 2006/09/23 13:26:38 roro
471 * Replace TABs by spaces in source code.
473 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
474 * Fix +redirect{}. Didn't work with -fast-redirects.
476 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
477 * Respond with 400 and a short text message
478 * if the client tries to use Privoxy as FTP proxy.
480 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
481 * Make number of retries in case of forwarded-connect problems
482 * a config file option (forwarded-connect-retries) and use 0 as
485 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
486 * Set random(3) seed.
488 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
489 * Follow the OpenBSD port's lead and protect the resolve
490 * functions on OpenBSD as well.
492 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
493 * --user fix. Only use the user as group if no group is specified.
494 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
496 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
497 * Windows service (re-)integration
501 * --install[:service_name]
502 * --uninstall[:service_name]
505 * They work as follows:
506 * --install will create a service for you and then terminate.
507 * By default the service name will be "privoxy" (without the quotes).
508 * However you can run multiple services if you wish, just by adding
509 * a colon and then a name (no spaces).
511 * --uninstall follows the exact same rules a --install.
513 * --service is used when the program is executed by the service
514 * control manager, and in normal circumstances would never be
515 * used as a command line argument.
517 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
518 * Windows service integration
520 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
521 * Incorporate Fabian Keil's patch work:
522 http://www.fabiankeil.de/sourcecode/privoxy/
524 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
525 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
526 * with what was really the latest development (the v_3_0_branch branch)
528 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
529 * Thanks to Jindrich Makovicka for a race condition fix for the log
530 * file. The race condition remains for non-pthread implementations.
531 * Reference patch #1175720.
533 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
534 * Add the ability to check jpeg images for invalid
535 * lengths of comment blocks. Defensive strategy
536 * against the exploit:
537 * Microsoft Security Bulletin MS04-028
538 * Buffer Overrun in JPEG Processing (GDI+) Could
539 * Allow Code Execution (833987)
540 * Enabled with +inspect-jpegs in actions files.
542 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
543 * - Fixed usage info for non-unix platforms
544 * - Fixed small cmdline parsing bug
546 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
547 * Diagnostics: Now preserve the returncode of pthread_create
548 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
550 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
551 * No longer ignore SIGCHLD. Fixes bug #769381
553 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
554 * Close jarfile on graceful exit, remove stray line
556 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
557 * Cosmetics: Killed a warning, a typo and an allocation left at exit
559 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
560 * No longer rely on non-POSIX.1 extensions of getcwd().
563 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
564 * Replaced setenv() by posix-compliant putenv()
565 * Thanks to Neil McCalden (nmcc AT users.sf.net).
567 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
568 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
570 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
571 * Clean-up and extension of improvements for forked mode:
572 * - Child's return code now consists of flags RC_FLAG_*
573 * - Reporting toggle to parent now properly #ifdef'ed
574 * - Children now report blocking to parent. This enables
575 * statistics in forked mode
577 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
578 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
579 * Children now report having been toggled through _exit(17), parents
580 * watch for that code and toggle themselves if found.
582 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
583 * Wrapping all *_r functions (the non-_r versions of them) with
584 * mutex semaphores for OSX. Hopefully this will take care of all
585 * of those pesky crash reports.
587 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
588 * Fixed two mostly harmless mem leaks
590 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
591 * Fix: Head of global clients list now initialized to NULL
593 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
594 * Added basic support for OPTIONS and TRACE HTTP methods:
595 * - New interceptor direct_response() added in chat().
596 * - sed() moved to earlier in the process, so that the
597 * Host: header is evaluated before actions and forwarding
600 * Revision 1.92 2002/05/08 16:00:46 oes
601 * Chat's buffer handling:
602 * - Fixed bug with unchecked out-of-mem conditions
603 * while reading client request & server headers
604 * - No longer predict if the buffer limit will be exceeded
605 * in the next read -- check add_to_iob's new
606 * return code. If buffer couldn't be extended
607 * (policy or out-of-mem) while
608 * - reading from client: abort
609 * - reading server headers: send error page
610 * - buffering server body for filter: flush,
611 * and if that fails: send error page
613 * Revision 1.91 2002/04/08 20:35:58 swa
616 * Revision 1.90 2002/04/02 14:57:28 oes
617 * Made sending wafers independent of FEATURE_COOKIE_JAR
619 * Revision 1.89 2002/03/31 17:18:59 jongfoster
620 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
622 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
623 * More compiler warning message maintenance
625 * Revision 1.87 2002/03/26 22:29:54 swa
626 * we have a new homepage!
628 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
629 * Workaround for closing the jarfile before load_config() comes around again
631 * Revision 1.85 2002/03/24 15:23:33 jongfoster
634 * Revision 1.84 2002/03/24 13:25:43 swa
635 * name change related issues
637 * Revision 1.83 2002/03/16 23:54:06 jongfoster
638 * Adding graceful termination feature, to help look for memory leaks.
639 * If you enable this (which, by design, has to be done by hand
640 * editing config.h) and then go to http://i.j.b/die, then the program
641 * will exit cleanly after the *next* request. It should free all the
642 * memory that was used.
644 * Revision 1.82 2002/03/13 00:27:05 jongfoster
647 * Revision 1.81 2002/03/12 01:42:50 oes
648 * Introduced modular filters
650 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
651 * OS/2 port maintenance:
652 * - Fixed EMX build - it had decayed a little
653 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
654 * substituted a memset for now.
656 * Revision 1.79 2002/03/09 20:03:52 jongfoster
657 * - Making various functions return int rather than size_t.
658 * (Undoing a recent change). Since size_t is unsigned on
659 * Windows, functions like read_socket that return -1 on
660 * error cannot return a size_t.
662 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
663 * crashes, and also frequently caused JB to jump to 100%
664 * CPU and stay there. (Because it thought it had just
665 * read ((unsigned)-1) == 4Gb of data...)
667 * - The signature of write_socket has changed, it now simply
668 * returns success=0/failure=nonzero.
670 * - Trying to get rid of a few warnings --with-debug on
671 * Windows, I've introduced a new type "jb_socket". This is
672 * used for the socket file descriptors. On Windows, this
673 * is SOCKET (a typedef for unsigned). Everywhere else, it's
674 * an int. The error value can't be -1 any more, so it's
675 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
676 * Windows it maps to the #define INVALID_SOCKET.)
678 * - The signature of bind_port has changed.
680 * Revision 1.78 2002/03/08 21:35:04 oes
681 * Added optional group supplement to --user option. Will now use default group of user if no group given
683 * Revision 1.77 2002/03/07 03:52:06 oes
684 * - Fixed compiler warnings etc
685 * - Improved handling of failed DNS lookups
687 * Revision 1.76 2002/03/06 22:54:35 jongfoster
688 * Automated function-comment nitpicking.
690 * Revision 1.75 2002/03/06 10:02:19 oes
691 * Fixed stupid bug when --user was not given
693 * Revision 1.74 2002/03/06 00:49:31 jongfoster
694 * Fixing warning on Windows
695 * Making #ifdefs that refer to the same variable consistently
696 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
698 * Revision 1.73 2002/03/05 23:57:30 hal9
699 * Stray character 's' on line 1618 was breaking build.
701 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
702 * - Re-enable OS/2 building after new parms were added
703 * - Fix false out of memory report when resolving CGI templates when no IP
704 * address is available of failed attempt (a la no such domain)
706 * Revision 1.71 2002/03/05 18:13:56 oes
707 * Added --user option
709 * Revision 1.70 2002/03/05 04:52:42 oes
710 * Deleted non-errlog debugging code
712 * Revision 1.69 2002/03/04 23:50:00 jongfoster
713 * Splitting off bind_port() call into bind_port_helper(), with
716 * Revision 1.68 2002/03/04 20:17:32 oes
719 * Revision 1.67 2002/03/04 18:18:57 oes
720 * - Removed _DEBUG mode
721 * - Cleand up cmdline parsing
722 * - Introduced --no-daemon, --pidfile options
723 * - Cleaned up signal handling:
724 * - Terminate cleanly on INT, TERM and ABRT
725 * - Schedule logfile for re-opening on HUP
726 * - Ignore CHLD and PIPE
727 * - Leave the rest with their default handlers
728 * - Uniform handler registration
729 * - Added usage() function
730 * - Played styleguide police
732 * Revision 1.66 2002/03/03 15:06:55 oes
733 * Re-enabled automatic config reloading
735 * Revision 1.65 2002/03/03 14:49:11 oes
736 * Fixed CLF logging: Now uses client's original HTTP request
738 * Revision 1.64 2002/03/03 09:18:03 joergs
739 * Made jumbjuster work on AmigaOS again.
741 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
742 * Clean up a little CRLF unpleasantness that suddenly appeared
744 * Revision 1.62 2002/02/20 23:17:23 jongfoster
745 * Detecting some out-of memory conditions and exiting with a log message.
747 * Revision 1.61 2002/01/17 21:01:52 jongfoster
748 * Moving all our URL and URL pattern parsing code to urlmatch.c.
750 * Revision 1.60 2001/12/30 14:07:32 steudten
751 * - Add signal handling (unix)
752 * - Add SIGHUP handler (unix)
753 * - Add creation of pidfile (unix)
754 * - Add action 'top' in rc file (RH)
755 * - Add entry 'SIGNALS' to manpage
756 * - Add exit message to logfile (unix)
758 * Revision 1.59 2001/12/13 14:07:18 oes
759 * Fixed Bug: 503 error page now sent OK
761 * Revision 1.58 2001/11/30 23:37:24 jongfoster
762 * Renaming the Win32 config file to config.txt - this is almost the
763 * same as the corresponding UNIX name "config"
765 * Revision 1.57 2001/11/16 00:47:43 jongfoster
766 * Changing the tty-disconnection code to use setsid().
768 * Revision 1.56 2001/11/13 20:20:54 jongfoster
769 * Tabs->spaces, fixing a bug with missing {} around an if()
771 * Revision 1.55 2001/11/13 20:14:53 jongfoster
772 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
774 * Revision 1.54 2001/11/07 00:03:14 steudten
775 * Give reliable return value if an error
776 * occurs not just 0 with new daemon mode.
778 * Revision 1.53 2001/11/05 21:41:43 steudten
779 * Add changes to be a real daemon just for unix os.
780 * (change cwd to /, detach from controlling tty, set
781 * process group and session leader to the own process.
783 * Add some fatal-error log message for failed malloc().
784 * Add '-d' if compiled with 'configure --with-debug' to
785 * enable debug output.
787 * Revision 1.52 2001/10/26 20:11:20 jongfoster
788 * Fixing type mismatch
790 * Revision 1.51 2001/10/26 17:38:28 oes
793 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
794 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
795 * threads to call select() simultaneously. So, it's time to do a real, live,
796 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
797 * (native). Both versions will work, but using __OS2__ offers multi-threading.
799 * Revision 1.49 2001/10/23 21:41:35 jongfoster
800 * Added call to initialize the (statically-allocated of course)
801 * "out of memory" CGI response.
803 * Revision 1.48 2001/10/10 19:56:46 jongfoster
804 * Moving some code that wasn't cookie-related out of an #ifdef
807 * Revision 1.47 2001/10/10 16:44:36 oes
808 * Added CONNECT destination port limitation check
810 * Revision 1.46 2001/10/08 15:17:41 oes
811 * Re-enabled SSL forwarding
813 * Revision 1.45 2001/10/07 15:42:11 oes
814 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
816 * Moved downgrading of the HTTP version from parse_http_request to
817 * chat(), since we can't decide if it is necessary before we have
818 * determined the actions for the URL. The HTTP command is now
819 * *always* re-built so the repairs need no longer be special-cased.
821 * filter_popups now gets a csp pointer so it can raise the new
822 * CSP_FLAG_MODIFIED flag.
826 * Added configurable size limit for the IOB. If the IOB grows so
827 * large that the next read would exceed the limit, the header
828 * is generated, and the header & unfiltered buffer are flushed
829 * to the client. Chat then continues in non-buffering,
830 * non-filtering body mode.
832 * Revision 1.44 2001/10/02 18:13:57 oes
835 * Revision 1.43 2001/10/02 15:32:13 oes
836 * Moved generation of hdr
838 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
839 * Cleaning up 2 compiler warnings on OS/2.
841 * Revision 1.41 2001/09/16 17:05:14 jongfoster
842 * Removing unused #include showarg.h
844 * Revision 1.40 2001/09/16 15:41:45 jongfoster
845 * Fixing signed/unsigned comparison warning.
847 * Revision 1.39 2001/09/16 13:21:27 jongfoster
848 * Changes to use new list functions.
850 * Revision 1.38 2001/09/16 13:01:46 jongfoster
851 * Removing redundant function call that zeroed zalloc()'d memory.
853 * Revision 1.37 2001/09/10 11:12:24 oes
854 * Deleted unused variable
856 * Revision 1.36 2001/09/10 10:56:15 oes
857 * Silenced compiler warnings
859 * Revision 1.35 2001/07/31 14:44:22 oes
860 * Deleted unused size parameter from filter_popups()
862 * Revision 1.34 2001/07/30 22:08:36 jongfoster
863 * Tidying up #defines:
864 * - All feature #defines are now of the form FEATURE_xxx
865 * - Permanently turned off WIN_GUI_EDIT
866 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
868 * Revision 1.33 2001/07/29 19:32:00 jongfoster
869 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
871 * Revision 1.32 2001/07/29 18:47:05 jongfoster
872 * Adding missing #include "loadcfg.h"
874 * Revision 1.31 2001/07/29 12:17:48 oes
875 * Applied pthread fix by Paul Lieverse
877 * Revision 1.30 2001/07/25 22:57:13 jongfoster
878 * __BEOS__ no longer overrides FEATURE_PTHREAD.
879 * This is because FEATURE_PTHREAD will soon be widely used, so I
880 * want to keep it simple.
882 * Revision 1.29 2001/07/24 12:47:06 oes
883 * Applied BeOS support update by Eugenia
885 * Revision 1.28 2001/07/23 13:26:12 oes
886 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
888 * Revision 1.27 2001/07/19 19:09:47 haroon
889 * - Added code to take care of the situation where while processing the first
890 * server response (which includes the server header), after finding the end
891 * of the headers we were not looking past the end of the headers for
892 * content modification. I enabled it for filter_popups.
893 * Someone else should look to see if other similar operations should be
894 * done to the discarded portion of the buffer.
896 * Note 2001/07/20: No, the other content modification mechanisms will process
897 * the whole iob later anyway. --oes
899 * Revision 1.26 2001/07/18 12:31:36 oes
902 * Revision 1.25 2001/07/15 19:43:49 jongfoster
903 * Supports POSIX threads.
904 * Also removed some unused #includes.
906 * Revision 1.24 2001/07/13 14:00:40 oes
907 * - Generic content modification scheme:
908 * Each feature has its own applicability flag that is set
909 * from csp->action->flags.
910 * Replaced the "filtering" int flag , by a function pointer
911 * "content_filter" to the function that will do the content
912 * modification. If it is != NULL, the document will be buffered
913 * and processed through *content_filter, which must set
914 * csp->content_length and return a modified copy of the body
915 * or return NULL (on failiure).
916 * - Changed csp->is_text to the more generic bitmap csp->content_type
917 * which can currently take the valued CT_TEXT or CT_GIF
919 * - Removed all #ifdef PCRS
921 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
922 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
923 * the `block_acl' call. This prevents a compilation error when the user
924 * does not wish to use the "ACL" feature.
926 * Revision 1.22 2001/06/29 21:45:41 oes
927 * Indentation, CRLF->LF, Tab-> Space
929 * Revision 1.21 2001/06/29 13:29:36 oes
930 * - Cleaned up, improved comments
931 * - Unified all possible interceptors (CGI,
932 * block, trust, fast_redirect) in one
933 * place, with one (CGI) answer generation
934 * mechansim. Much clearer now.
935 * - Removed the GIF image generation, which
936 * is now done in filters.c:block_url()
937 * - Made error conditions like domain lookup
938 * failiure or (various) problems while talking
939 * to the server use cgi.c:error_response()
940 * instead of generating HTML/HTTP in chat() (yuck!)
941 * - Removed logentry from cancelled commit
943 * Revision 1.20 2001/06/09 10:55:28 jongfoster
944 * Changing BUFSIZ ==> BUFFER_SIZE
946 * Revision 1.19 2001/06/07 23:12:52 jongfoster
947 * Replacing function pointer in struct gateway with a directly
948 * called function forwarded_connect().
949 * Replacing struct gateway with struct forward_spec
951 * Revision 1.18 2001/06/03 19:12:16 oes
952 * introduced new cgi handling
954 * Revision 1.17 2001/06/01 20:07:23 jongfoster
955 * Now uses action +image-blocker{} rather than config->tinygif
957 * Revision 1.16 2001/06/01 18:49:17 jongfoster
958 * Replaced "list_share" with "list" - the tiny memory gain was not
959 * worth the extra complexity.
961 * Revision 1.15 2001/05/31 21:24:47 jongfoster
962 * Changed "permission" to "action" throughout.
963 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
964 * Moved vanilla wafer check into chat(), since we must now
965 * decide whether or not to add it based on the URL.
967 * Revision 1.14 2001/05/29 20:14:01 joergs
968 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
971 * Revision 1.13 2001/05/29 09:50:24 jongfoster
972 * Unified blocklist/imagelist/permissionslist.
973 * File format is still under discussion, but the internal changes
976 * Also modified interceptor behaviour:
977 * - We now intercept all URLs beginning with one of the following
978 * prefixes (and *only* these prefixes):
980 * * http://ijbswa.sf.net/config/
981 * * http://ijbswa.sourceforge.net/config/
982 * - New interceptors "home page" - go to http://i.j.b/ to see it.
983 * - Internal changes so that intercepted and fast redirect pages
984 * are not replaced with an image.
985 * - Interceptors now have the option to send a binary page direct
986 * to the client. (i.e. ijb-send-banner uses this)
987 * - Implemented show-url-info interceptor. (Which is why I needed
988 * the above interceptors changes - a typical URL is
989 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
990 * The previous mechanism would not have intercepted that, and
991 * if it had been intercepted then it then it would have replaced
994 * Revision 1.12 2001/05/27 22:17:04 oes
996 * - re_process_buffer no longer writes the modified buffer
997 * to the client, which was very ugly. It now returns the
998 * buffer, which it is then written by chat.
1000 * - content_length now adjusts the Content-Length: header
1001 * for modified documents rather than crunch()ing it.
1002 * (Length info in csp->content_length, which is 0 for
1003 * unmodified documents)
1005 * - For this to work, sed() is called twice when filtering.
1007 * Revision 1.11 2001/05/26 17:27:53 jongfoster
1008 * Added support for CLF and fixed LOG_LEVEL_LOG.
1009 * Also did CRLF->LF fix of my previous patch.
1011 * Revision 1.10 2001/05/26 15:26:15 jongfoster
1012 * ACL feature now provides more security by immediately dropping
1013 * connections from untrusted hosts.
1015 * Revision 1.9 2001/05/26 00:28:36 jongfoster
1016 * Automatic reloading of config file.
1017 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
1018 * Most of the global variables have been moved to a new
1019 * struct configuration_spec, accessed through csp->config->globalname
1020 * Most of the globals remaining are used by the Win32 GUI.
1022 * Revision 1.8 2001/05/25 22:43:18 jongfoster
1023 * Fixing minor memory leak and buffer overflow.
1025 * Revision 1.7 2001/05/25 22:34:30 jongfoster
1028 * Revision 1.6 2001/05/23 00:13:58 joergs
1029 * AmigaOS support fixed.
1031 * Revision 1.5 2001/05/22 18:46:04 oes
1033 * - Enabled filtering banners by size rather than URL
1034 * by adding patterns that replace all standard banner
1035 * sizes with the "Junkbuster" gif to the re_filterfile
1037 * - Enabled filtering WebBugs by providing a pattern
1038 * which kills all 1x1 images
1040 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
1041 * which is selected by the (nonstandard and therefore
1042 * capital) letter 'U' in the option string.
1043 * It causes the quantifiers to be ungreedy by default.
1044 * Appending a ? turns back to greedy (!).
1046 * - Added a new interceptor ijb-send-banner, which
1047 * sends back the "Junkbuster" gif. Without imagelist or
1048 * MSIE detection support, or if tinygif = 1, or the
1049 * URL isn't recognized as an imageurl, a lame HTML
1050 * explanation is sent instead.
1052 * - Added new feature, which permits blocking remote
1053 * script redirects and firing back a local redirect
1055 * The feature is conditionally compiled, i.e. it
1056 * can be disabled with --disable-fast-redirects,
1057 * plus it must be activated by a "fast-redirects"
1058 * line in the config file, has its own log level
1059 * and of course wants to be displayed by show-proxy-args
1060 * Note: Boy, all the #ifdefs in 1001 locations and
1061 * all the fumbling with configure.in and acconfig.h
1062 * were *way* more work than the feature itself :-(
1064 * - Because a generic redirect template was needed for
1065 * this, tinygif = 3 now uses the same.
1067 * - Moved GIFs, and other static HTTP response templates
1070 * - Some minor fixes
1072 * - Removed some >400 CRs again (Jon, you really worked
1075 * Revision 1.4 2001/05/21 19:34:01 jongfoster
1076 * Made failure to bind() a fatal error.
1078 * Revision 1.3 2001/05/20 01:21:20 jongfoster
1079 * Version 2.9.4 checkin.
1080 * - Merged popupfile and cookiefile, and added control over PCRS
1081 * filtering, in new "permissionsfile".
1082 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
1083 * file error you now get a message box (in the Win32 GUI) rather
1084 * than the program exiting with no explanation.
1085 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
1087 * - Removed tabs from "config"
1088 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
1089 * - Bumped up version number.
1091 * Revision 1.2 2001/05/17 22:34:44 oes
1092 * - Added hint on GIF char array generation to jcc.c
1093 * - Cleaned CRLF's from the sources and related files
1094 * - Repaired logging for REF and FRC
1096 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
1097 * Initial import of version 2.9.3 source tree
1100 *********************************************************************/
1106 #include <sys/types.h>
1115 # ifndef FEATURE_PTHREAD
1119 # include <windows.h>
1120 # include <process.h>
1121 # endif /* ndef FEATURE_PTHREAD */
1124 # ifndef _WIN_CONSOLE
1125 # include "w32log.h"
1126 # endif /* ndef _WIN_CONSOLE */
1127 # include "w32svrapi.h"
1129 #else /* ifndef _WIN32 */
1131 # if !defined (__OS2__)
1132 # include <unistd.h>
1133 # include <sys/wait.h>
1134 # endif /* ndef __OS2__ */
1135 # include <sys/time.h>
1136 # include <sys/stat.h>
1137 # include <sys/ioctl.h>
1140 #include <sys/termios.h>
1148 # include <signal.h>
1151 # include <socket.h> /* BeOS has select() for sockets only. */
1152 # include <OS.h> /* declarations for threads and stuff. */
1155 # if defined(__EMX__) || defined(__OS2__)
1156 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
1161 #define bzero(B,N) memset(B,0x00,n)
1165 # include <select.h>
1170 #include "project.h"
1173 #include "filters.h"
1174 #include "loaders.h"
1175 #include "parsers.h"
1176 #include "miscutil.h"
1178 #include "jbsockets.h"
1179 #include "gateway.h"
1180 #include "actions.h"
1182 #include "loadcfg.h"
1183 #include "urlmatch.h"
1185 const char jcc_h_rcs[] = JCC_H_VERSION;
1186 const char project_h_rcs[] = PROJECT_H_VERSION;
1189 struct client_state clients[1];
1190 struct file_list files[1];
1192 #ifdef FEATURE_STATISTICS
1193 int urls_read = 0; /* total nr of urls read inc rejected */
1194 int urls_rejected = 0; /* total nr of urls rejected */
1195 #endif /* def FEATURE_STATISTICS */
1197 #ifdef FEATURE_GRACEFUL_TERMINATION
1198 int g_terminate = 0;
1201 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1202 static void sig_handler(int the_signal);
1204 static int client_protocol_is_unsupported(const struct client_state *csp, char *req);
1205 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
1206 static jb_err get_server_headers(struct client_state *csp);
1207 static const char *crunch_reason(const struct http_response *rsp);
1208 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp);
1209 static char *get_request_line(struct client_state *csp);
1210 static jb_err receive_client_request(struct client_state *csp);
1211 static jb_err parse_client_request(struct client_state *csp);
1212 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
1213 static jb_err change_request_destination(struct client_state *csp);
1214 static void chat(struct client_state *csp);
1215 static void serve(struct client_state *csp);
1216 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1217 static void usage(const char *myname);
1219 static void initialize_mutexes(void);
1220 static jb_socket bind_port_helper(struct configuration_spec *config);
1221 static void listen_loop(void);
1224 void serve(struct client_state *csp);
1225 #else /* ifndef AMIGA */
1226 static void serve(struct client_state *csp);
1227 #endif /* def AMIGA */
1230 static int32 server_thread(void *data);
1231 #endif /* def __BEOS__ */
1234 #define sleep(N) Sleep(((N) * 1000))
1238 #define sleep(N) DosSleep(((N) * 100))
1241 #ifdef MUTEX_LOCKS_AVAILABLE
1243 * XXX: Does the locking stuff really belong in this file?
1245 privoxy_mutex_t log_mutex;
1246 privoxy_mutex_t log_init_mutex;
1247 privoxy_mutex_t connection_reuse_mutex;
1249 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
1250 privoxy_mutex_t resolver_mutex;
1251 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
1253 #ifndef HAVE_GMTIME_R
1254 privoxy_mutex_t gmtime_mutex;
1255 #endif /* ndef HAVE_GMTIME_R */
1257 #ifndef HAVE_LOCALTIME_R
1258 privoxy_mutex_t localtime_mutex;
1259 #endif /* ndef HAVE_GMTIME_R */
1262 privoxy_mutex_t rand_mutex;
1263 #endif /* ndef HAVE_RANDOM */
1265 #endif /* def MUTEX_LOCKS_AVAILABLE */
1268 const char *basedir = NULL;
1269 const char *pidfile = NULL;
1270 static int received_hup_signal = 0;
1271 #endif /* defined unix */
1273 /* HTTP snipplets. */
1274 static const char CSUCCEED[] =
1275 "HTTP/1.0 200 Connection established\r\n"
1276 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
1278 static const char CHEADER[] =
1279 "HTTP/1.0 400 Invalid header received from client\r\n"
1280 "Proxy-Agent: Privoxy " VERSION "\r\n"
1281 "Content-Type: text/plain\r\n"
1282 "Connection: close\r\n\r\n"
1283 "Invalid header received from client.\r\n";
1285 static const char FTP_RESPONSE[] =
1286 "HTTP/1.0 400 Invalid request received from client\r\n"
1287 "Content-Type: text/plain\r\n"
1288 "Connection: close\r\n\r\n"
1289 "Invalid request. Privoxy doesn't support FTP.\r\n";
1291 static const char GOPHER_RESPONSE[] =
1292 "HTTP/1.0 400 Invalid request received from client\r\n"
1293 "Content-Type: text/plain\r\n"
1294 "Connection: close\r\n\r\n"
1295 "Invalid request. Privoxy doesn't support gopher.\r\n";
1297 /* XXX: should be a template */
1298 static const char MISSING_DESTINATION_RESPONSE[] =
1299 "HTTP/1.0 400 Bad request received from client\r\n"
1300 "Proxy-Agent: Privoxy " VERSION "\r\n"
1301 "Content-Type: text/plain\r\n"
1302 "Connection: close\r\n\r\n"
1303 "Bad request. Privoxy was unable to extract the destination.\r\n";
1305 /* XXX: should be a template */
1306 static const char NO_SERVER_DATA_RESPONSE[] =
1307 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1308 "Proxy-Agent: Privoxy " VERSION "\r\n"
1309 "Content-Type: text/plain\r\n"
1310 "Connection: close\r\n\r\n"
1311 "Empty server or forwarder response.\r\n"
1312 "The connection has been closed but Privoxy didn't receive any data.\r\n";
1314 /* XXX: should be a template */
1315 static const char INVALID_SERVER_HEADERS_RESPONSE[] =
1316 "HTTP/1.0 502 Server or forwarder response invalid\r\n"
1317 "Proxy-Agent: Privoxy " VERSION "\r\n"
1318 "Content-Type: text/plain\r\n"
1319 "Connection: close\r\n\r\n"
1320 "Bad response. The server or forwarder response doesn't look like HTTP.\r\n";
1323 /* XXX: should be a template */
1324 static const char NULL_BYTE_RESPONSE[] =
1325 "HTTP/1.0 400 Bad request received from client\r\n"
1326 "Proxy-Agent: Privoxy " VERSION "\r\n"
1327 "Content-Type: text/plain\r\n"
1328 "Connection: close\r\n\r\n"
1329 "Bad request. Null byte(s) before end of request.\r\n";
1332 /* XXX: should be a template */
1333 static const char MESSED_UP_REQUEST_RESPONSE[] =
1334 "HTTP/1.0 400 Malformed request after rewriting\r\n"
1335 "Proxy-Agent: Privoxy " VERSION "\r\n"
1336 "Content-Type: text/plain\r\n"
1337 "Connection: close\r\n\r\n"
1338 "Bad request. Messed up with header filters.\r\n";
1340 /* A function to crunch a response */
1341 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
1343 /* Crunch function flags */
1344 #define CF_NO_FLAGS 0
1345 /* Cruncher applies to forced requests as well */
1346 #define CF_IGNORE_FORCE 1
1347 /* Crunched requests are counted for the block statistics */
1348 #define CF_COUNT_AS_REJECT 2
1350 /* A crunch function and its flags */
1353 const crunch_func_ptr cruncher;
1357 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
1359 /* Complete list of cruncher functions */
1360 static const struct cruncher crunchers_all[] = {
1361 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
1362 { block_url, CF_COUNT_AS_REJECT },
1363 #ifdef FEATURE_TRUST
1364 { trust_url, CF_COUNT_AS_REJECT },
1365 #endif /* def FEATURE_TRUST */
1366 { redirect_url, CF_NO_FLAGS },
1367 { dispatch_cgi, CF_IGNORE_FORCE},
1371 /* Light version, used after tags are applied */
1372 static const struct cruncher crunchers_light[] = {
1373 { block_url, CF_COUNT_AS_REJECT },
1374 { redirect_url, CF_NO_FLAGS },
1380 * XXX: Don't we really mean
1386 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1387 /*********************************************************************
1389 * Function : sig_handler
1391 * Description : Signal handler for different signals.
1392 * Exit gracefully on TERM and INT
1393 * or set a flag that will cause the errlog
1394 * to be reopened by the main thread on HUP.
1397 * 1 : the_signal = the signal cause this function to call
1401 *********************************************************************/
1402 static void sig_handler(int the_signal)
1408 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1420 received_hup_signal = 1;
1426 * We shouldn't be here, unless we catch signals
1427 * in main() that we can't handle here!
1429 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1437 /*********************************************************************
1439 * Function : client_protocol_is_unsupported
1441 * Description : Checks if the client used a known unsupported
1442 * protocol and deals with it by sending an error
1446 * 1 : csp = Current client state (buffers, headers, etc...)
1447 * 2 : req = the first request line send by the client
1449 * Returns : TRUE if an error response has been generated, or
1450 * FALSE if the request doesn't look invalid.
1452 *********************************************************************/
1453 static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1456 * If it's a FTP or gopher request, we don't support it.
1458 * These checks are better than nothing, but they might
1459 * not work in all configurations and some clients might
1460 * have problems digesting the answer.
1462 * They should, however, never cause more problems than
1463 * Privoxy's old behaviour (returning the misleading HTML
1466 * "Could not resolve http://(ftp|gopher)://example.org").
1468 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1470 const char *response = NULL;
1471 const char *protocol = NULL;
1473 if (!strncmpic(req, "GET ftp://", 10))
1475 response = FTP_RESPONSE;
1480 response = GOPHER_RESPONSE;
1481 protocol = "GOPHER";
1483 log_error(LOG_LEVEL_ERROR,
1484 "%s tried to use Privoxy as %s proxy: %s",
1485 csp->ip_addr_str, protocol, req);
1486 log_error(LOG_LEVEL_CLF,
1487 "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1489 write_socket(csp->cfd, response, strlen(response));
1498 /*********************************************************************
1500 * Function : get_request_destination_elsewhere
1502 * Description : If the client's request was redirected into
1503 * Privoxy without the client's knowledge,
1504 * the request line lacks the destination host.
1506 * This function tries to get it elsewhere,
1507 * provided accept-intercepted-requests is enabled.
1509 * "Elsewhere" currently only means "Host: header",
1510 * but in the future we may ask the redirecting
1511 * packet filter to look the destination up.
1513 * If the destination stays unknown, an error
1514 * response is send to the client and headers
1515 * are freed so that chat() can return directly.
1518 * 1 : csp = Current client state (buffers, headers, etc...)
1519 * 2 : headers = a header list
1521 * Returns : JB_ERR_OK if the destination is now known, or
1522 * JB_ERR_PARSE if it isn't.
1524 *********************************************************************/
1525 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1529 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1531 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1532 " Privoxy isn't configured to accept intercepted requests.",
1533 csp->ip_addr_str, csp->http->cmd);
1534 /* XXX: Use correct size */
1535 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1536 csp->ip_addr_str, csp->http->cmd);
1538 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1539 destroy_list(headers);
1541 return JB_ERR_PARSE;
1543 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1545 /* Split the domain we just got for pattern matching */
1546 init_domain_components(csp->http);
1552 /* We can't work without destination. Go spread the news.*/
1554 req = list_to_text(headers);
1556 /* XXX: Use correct size */
1557 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1558 csp->ip_addr_str, csp->http->cmd);
1559 log_error(LOG_LEVEL_ERROR,
1560 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1561 csp->ip_addr_str, csp->http->cmd, req);
1564 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
1565 destroy_list(headers);
1567 return JB_ERR_PARSE;
1570 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1571 * to get the destination IP address, use it as host directly
1572 * or do a reverse DNS lookup first.
1577 /*********************************************************************
1579 * Function : get_server_headers
1581 * Description : Parses server headers in iob and fills them
1582 * into csp->headers so that they can later be
1586 * 1 : csp = Current client state (buffers, headers, etc...)
1588 * Returns : JB_ERR_OK if everything went fine, or
1589 * JB_ERR_PARSE if the headers were incomplete.
1591 *********************************************************************/
1592 static jb_err get_server_headers(struct client_state *csp)
1594 int continue_hack_in_da_house = 0;
1597 while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
1602 * continue hack in da house. Ignore the ending of
1603 * this head and continue enlisting header lines.
1604 * The reason is described below.
1606 enlist(csp->headers, "");
1607 continue_hack_in_da_house = 0;
1610 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1613 * It's a bodyless continue response, don't
1614 * stop header parsing after reaching its end.
1616 * As a result Privoxy will concatenate the
1617 * next response's head and parse and deliver
1618 * the headers as if they belonged to one request.
1620 * The client will separate them because of the
1621 * empty line between them.
1623 * XXX: What we're doing here is clearly against
1624 * the intended purpose of the continue header,
1625 * and under some conditions (HTTP/1.0 client request)
1626 * it's a standard violation.
1628 * Anyway, "sort of against the spec" is preferable
1629 * to "always getting confused by Continue responses"
1630 * (Privoxy's behaviour before this hack was added)
1632 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1633 continue_hack_in_da_house = 1;
1635 else if (*header == '\0')
1638 * If the header is empty, but the Continue hack
1639 * isn't active, we can assume that we reached the
1640 * end of the buffer before we hit the end of the
1643 * Inform the caller an let it decide how to handle it.
1645 return JB_ERR_PARSE;
1648 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1651 * XXX: Should we quit the request and return a
1652 * out of memory error page instead?
1654 log_error(LOG_LEVEL_ERROR,
1655 "Out of memory while enlisting server headers. %s lost.",
1665 /*********************************************************************
1667 * Function : crunch_reason
1669 * Description : Translates the crunch reason code into a string.
1672 * 1 : rsp = a http_response
1674 * Returns : A string with the crunch reason or an error description.
1676 *********************************************************************/
1677 static const char *crunch_reason(const struct http_response *rsp)
1679 char * reason = NULL;
1681 assert(rsp != NULL);
1684 return "Internal error while searching for crunch reason";
1687 switch (rsp->reason)
1689 case RSP_REASON_UNSUPPORTED:
1690 reason = "Unsupported HTTP feature";
1692 case RSP_REASON_BLOCKED:
1695 case RSP_REASON_UNTRUSTED:
1696 reason = "Untrusted";
1698 case RSP_REASON_REDIRECTED:
1699 reason = "Redirected";
1701 case RSP_REASON_CGI_CALL:
1702 reason = "CGI Call";
1704 case RSP_REASON_NO_SUCH_DOMAIN:
1705 reason = "DNS failure";
1707 case RSP_REASON_FORWARDING_FAILED:
1708 reason = "Forwarding failed";
1710 case RSP_REASON_CONNECT_FAILED:
1711 reason = "Connection failure";
1713 case RSP_REASON_OUT_OF_MEMORY:
1714 reason = "Out of memory (may mask other reasons)";
1717 reason = "No reason recorded";
1725 /*********************************************************************
1727 * Function : send_crunch_response
1729 * Description : Delivers already prepared response for
1730 * intercepted requests, logs the interception
1731 * and frees the response.
1734 * 1 : csp = Current client state (buffers, headers, etc...)
1735 * 1 : rsp = Fully prepared response. Will be freed on exit.
1737 * Returns : Nothing.
1739 *********************************************************************/
1740 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp)
1742 const struct http_request *http = csp->http;
1743 char status_code[4];
1745 assert(rsp != NULL);
1746 assert(rsp->head != NULL);
1751 * Not supposed to happen. If it does
1752 * anyway, treat it as an unknown error.
1754 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1755 /* return code doesn't matter */
1760 /* If rsp is still NULL, we have serious internal problems. */
1761 log_error(LOG_LEVEL_FATAL,
1762 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1766 * Extract the status code from the actual head
1767 * that was send to the client. It is the only
1768 * way to get it right for all requests, including
1769 * the fixed ones for out-of-memory problems.
1771 * A head starts like this: 'HTTP/1.1 200...'
1775 status_code[0] = rsp->head[9];
1776 status_code[1] = rsp->head[10];
1777 status_code[2] = rsp->head[11];
1778 status_code[3] = '\0';
1780 /* Write the answer to the client */
1781 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1782 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1784 /* There is nothing we can do about it. */
1785 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1788 /* Log that the request was crunched and why. */
1789 log_error(LOG_LEVEL_GPC, "%s%s crunch! (%s)",
1790 http->hostport, http->path, crunch_reason(rsp));
1791 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %d",
1792 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1794 /* Clean up and return */
1795 if (cgi_error_memory() != rsp)
1797 free_http_response(rsp);
1804 /*********************************************************************
1806 * Function : request_contains_null_bytes
1808 * Description : Checks for NULL bytes in the request and sends
1809 * an error message to the client if any were found.
1811 * XXX: currently not used, see comment in chat().
1814 * 1 : csp = Current client state (buffers, headers, etc...)
1815 * 2 : buf = Data from the client's request to check.
1816 * 3 : len = The data length.
1818 * Returns : TRUE if the request contained one or more NULL bytes, or
1821 *********************************************************************/
1822 static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1824 size_t c_len; /* Request lenght when treated as C string */
1826 c_len = strlen(buf);
1831 * Null byte(s) found. Log the request,
1832 * return an error response and hang up.
1834 size_t tmp_len = c_len;
1839 * Replace NULL byte(s) with '°' characters
1840 * so the request can be logged as string.
1841 * XXX: Is there a better replacement character?
1844 tmp_len += strlen(buf+tmp_len);
1845 } while (tmp_len < len);
1847 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1848 "(length=%d, strlen=%d).", csp->ip_addr_str, len, c_len);
1849 log_error(LOG_LEVEL_HEADER,
1850 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1852 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
1854 /* XXX: Log correct size */
1855 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1865 /*********************************************************************
1867 * Function : crunch_response_triggered
1869 * Description : Checks if the request has to be crunched,
1870 * and delivers the crunch response if necessary.
1873 * 1 : csp = Current client state (buffers, headers, etc...)
1874 * 2 : crunchers = list of cruncher functions to run
1876 * Returns : TRUE if the request was answered with a crunch response
1879 *********************************************************************/
1880 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
1882 struct http_response *rsp = NULL;
1883 const struct cruncher *c;
1886 * If CGI request crunching is disabled,
1887 * check the CGI dispatcher out of order to
1888 * prevent unintentional blocks or redirects.
1890 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
1891 && (NULL != (rsp = dispatch_cgi(csp))))
1893 /* Deliver, log and free the interception response. */
1894 send_crunch_response(csp, rsp);
1898 for (c = crunchers; c->cruncher != NULL; c++)
1901 * Check the cruncher if either Privoxy is toggled
1902 * on and the request isn't forced, or if the cruncher
1903 * applies to forced requests as well.
1905 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
1906 !(csp->flags & CSP_FLAG_FORCED)) ||
1907 (c->flags & CF_IGNORE_FORCE))
1909 rsp = c->cruncher(csp);
1912 /* Deliver, log and free the interception response. */
1913 send_crunch_response(csp, rsp);
1914 #ifdef FEATURE_STATISTICS
1915 if (c->flags & CF_COUNT_AS_REJECT)
1917 csp->flags |= CSP_FLAG_REJECTED;
1919 #endif /* def FEATURE_STATISTICS */
1930 /*********************************************************************
1932 * Function : build_request_line
1934 * Description : Builds the HTTP request line.
1936 * If a HTTP forwarder is used it expects the whole URL,
1937 * web servers only get the path.
1940 * 1 : csp = Current client state (buffers, headers, etc...)
1941 * 2 : fwd = The forwarding spec used for the request
1942 * XXX: Should use http->fwd instead.
1943 * 3 : request_line = The old request line which will be replaced.
1945 * Returns : Nothing. Terminates in case of memory problems.
1947 *********************************************************************/
1948 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
1950 struct http_request *http = csp->http;
1952 assert(http->ssl == 0);
1955 * Downgrade http version from 1.1 to 1.0
1956 * if +downgrade action applies.
1958 if ( (csp->action->flags & ACTION_DOWNGRADE)
1959 && (!strcmpic(http->ver, "HTTP/1.1")))
1962 http->ver = strdup("HTTP/1.0");
1964 if (http->ver == NULL)
1966 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1971 * Rebuild the request line.
1973 freez(*request_line);
1974 *request_line = strdup(http->gpc);
1975 string_append(request_line, " ");
1977 if (fwd->forward_host)
1979 string_append(request_line, http->url);
1983 string_append(request_line, http->path);
1985 string_append(request_line, " ");
1986 string_append(request_line, http->ver);
1988 if (*request_line == NULL)
1990 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1992 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
1996 /*********************************************************************
1998 * Function : change_request_destination
2000 * Description : Parse a (rewritten) request line and regenerate
2001 * the http request data.
2004 * 1 : csp = Current client state (buffers, headers, etc...)
2006 * Returns : Forwards the parse_http_request() return code.
2007 * Terminates in case of memory problems.
2009 *********************************************************************/
2010 static jb_err change_request_destination(struct client_state *csp)
2012 struct http_request *http = csp->http;
2015 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
2016 free_http_request(http);
2017 err = parse_http_request(csp->headers->first->str, http, csp);
2018 if (JB_ERR_OK != err)
2020 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
2021 jb_err_to_string(err));
2025 /* XXX: ocmd is a misleading name */
2026 http->ocmd = strdup(http->cmd);
2027 if (http->ocmd == NULL)
2029 log_error(LOG_LEVEL_FATAL,
2030 "Out of memory copying rewritten HTTP request line");
2038 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2039 /*********************************************************************
2041 * Function : server_response_is_complete
2043 * Description : Determines whether we should stop reading
2044 * from the server socket.
2047 * 1 : csp = Current client state (buffers, headers, etc...)
2048 * 2 : content_length = Length of content received so far.
2050 * Returns : TRUE if the response is complete,
2053 *********************************************************************/
2054 static int server_response_is_complete(struct client_state *csp, size_t content_length)
2056 int content_length_known = (csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
2058 if (!strcmpic(csp->http->gpc, "HEAD"))
2061 * "HEAD" implies no body, we are thus expecting
2062 * no content. XXX: incomplete "list" of methods?
2064 csp->expected_content_length = 0;
2065 content_length_known = TRUE;
2068 if (csp->http->status == 304)
2071 * Expect no body. XXX: incomplete "list" of status codes?
2073 csp->expected_content_length = 0;
2074 content_length_known = TRUE;
2077 return (content_length_known && ((0 == csp->expected_content_length)
2078 || (csp->expected_content_length <= content_length)));
2080 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2082 /*********************************************************************
2084 * Function : mark_server_socket_tainted
2086 * Description : Makes sure we don't reuse a server socket
2087 * (if we didn't read everything the server sent
2088 * us reusing the socket would lead to garbage).
2091 * 1 : csp = Current client state (buffers, headers, etc...)
2095 *********************************************************************/
2096 static void mark_server_socket_tainted(struct client_state *csp)
2098 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
2100 log_error(LOG_LEVEL_CONNECT, "Unsetting keep-alive flag.");
2101 csp->flags &= ~CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE;
2105 /*********************************************************************
2107 * Function : get_request_line
2109 * Description : Read the client request line.
2112 * 1 : csp = Current client state (buffers, headers, etc...)
2114 * Returns : Pointer to request line or NULL in case of errors.
2116 *********************************************************************/
2117 static char *get_request_line(struct client_state *csp)
2119 char buf[BUFFER_SIZE];
2120 char *request_line = NULL;
2123 memset(buf, 0, sizeof(buf));
2127 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2129 if (len <= 0) return NULL;
2132 * If there is no memory left for buffering the
2133 * request, there is nothing we can do but hang up
2135 if (add_to_iob(csp, buf, len))
2140 request_line = get_header(csp->iob);
2142 } while ((NULL != request_line) && ('\0' == *request_line));
2144 return request_line;
2149 /*********************************************************************
2151 * Function : receive_client_request
2153 * Description : Read the client's request (more precisely the
2154 * client headers) and answer it if necessary.
2156 * Note that since we're not using select() we could get
2157 * blocked here if a client connected, then didn't say
2161 * 1 : csp = Current client state (buffers, headers, etc...)
2163 * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
2165 *********************************************************************/
2166 static jb_err receive_client_request(struct client_state *csp)
2168 char buf[BUFFER_SIZE];
2171 struct http_request *http;
2175 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
2176 struct list header_list;
2177 struct list *headers = &header_list;
2181 memset(buf, 0, sizeof(buf));
2183 req = get_request_line(csp);
2185 if ((NULL != req) && ('\0' != *req))
2187 /* Request received. Validate and parse it. */
2189 /* Does the request line look invalid? */
2190 if (client_protocol_is_unsupported(csp, req))
2193 * Yes. The request has already been
2194 * answered with a error response, the buffers
2195 * were freed and we're done with chatting.
2197 return JB_ERR_PARSE;
2200 #ifdef FEATURE_FORCE_LOAD
2202 * If this request contains the FORCE_PREFIX and blocks
2203 * aren't enforced, get rid of it and set the force flag.
2205 if (strstr(req, FORCE_PREFIX))
2207 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
2209 log_error(LOG_LEVEL_FORCE,
2210 "Ignored force prefix in request: \"%s\".", req);
2214 strclean(req, FORCE_PREFIX);
2215 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
2216 csp->flags |= CSP_FLAG_FORCED;
2219 #endif /* def FEATURE_FORCE_LOAD */
2221 err = parse_http_request(req, http, csp);
2222 if (JB_ERR_OK != err)
2224 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", jb_err_to_string(err));
2230 if (http->cmd == NULL)
2232 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
2233 /* XXX: Use correct size */
2234 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2235 log_error(LOG_LEVEL_ERROR, "Invalid header received from %s.", csp->ip_addr_str);
2237 free_http_request(http);
2238 return JB_ERR_PARSE;
2241 /* grab the rest of the client's headers */
2245 p = get_header(csp->iob);
2249 /* There are no additional headers to read. */
2256 * We didn't receive a complete header
2257 * line yet, get the rest of it.
2259 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2262 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
2263 destroy_list(headers);
2264 return JB_ERR_PARSE;
2267 if (add_to_iob(csp, buf, len))
2270 * If there is no memory left for buffering the
2271 * request, there is nothing we can do but hang up
2273 destroy_list(headers);
2274 return JB_ERR_MEMORY;
2280 * We were able to read a complete
2281 * header and can finaly enlist it.
2288 if (http->host == NULL)
2291 * If we still don't know the request destination,
2292 * the request is invalid or the client uses
2293 * Privoxy without its knowledge.
2295 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
2298 * Our attempts to get the request destination
2299 * elsewhere failed or Privoxy is configured
2300 * to only accept proxy requests.
2302 * An error response has already been send
2303 * and we're done here.
2305 return JB_ERR_PARSE;
2310 * Determine the actions for this URL
2312 #ifdef FEATURE_TOGGLE
2313 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
2315 /* Most compatible set of actions (i.e. none) */
2316 init_current_action(csp->action);
2319 #endif /* ndef FEATURE_TOGGLE */
2321 get_url_actions(csp, http);
2325 * Save a copy of the original request for logging
2327 http->ocmd = strdup(http->cmd);
2328 if (http->ocmd == NULL)
2330 log_error(LOG_LEVEL_FATAL,
2331 "Out of memory copying HTTP request line");
2333 enlist(csp->headers, http->cmd);
2335 /* Append the previously read headers */
2336 list_append_list_unique(csp->headers, headers);
2337 destroy_list(headers);
2344 /*********************************************************************
2346 * Function : parse_client_request
2348 * Description : Parses the client's request and decides what to do
2351 * Note that since we're not using select() we could get
2352 * blocked here if a client connected, then didn't say
2356 * 1 : csp = Current client state (buffers, headers, etc...)
2358 * Returns : JB_ERR_OK or JB_ERR_PARSE
2360 *********************************************************************/
2361 static jb_err parse_client_request(struct client_state *csp)
2363 struct http_request *http = csp->http;
2366 err = sed(csp, FILTER_CLIENT_HEADERS);
2367 if (JB_ERR_OK != err)
2369 /* XXX: Should be handled in sed(). */
2370 assert(err == JB_ERR_PARSE);
2371 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers.");
2373 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2375 /* Check request line for rewrites. */
2376 if ((NULL == csp->headers->first->str)
2377 || (strcmp(http->cmd, csp->headers->first->str) &&
2378 (JB_ERR_OK != change_request_destination(csp))))
2381 * A header filter broke the request line - bail out.
2383 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
2384 /* XXX: Use correct size */
2385 log_error(LOG_LEVEL_CLF,
2386 "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
2387 log_error(LOG_LEVEL_ERROR,
2388 "Invalid request line after applying header filters.");
2389 free_http_request(http);
2391 return JB_ERR_PARSE;
2399 /*********************************************************************
2403 * Description : Once a connection to the client has been accepted,
2404 * this function is called (via serve()) to handle the
2405 * main business of the communication. When this
2406 * function returns, the caller must close the client
2409 * FIXME: chat is nearly thousand lines long.
2413 * 1 : csp = Current client state (buffers, headers, etc...)
2415 * Returns : Nothing.
2417 *********************************************************************/
2418 static void chat(struct client_state *csp)
2420 char buf[BUFFER_SIZE];
2427 int ms_iis5_hack = 0;
2428 size_t byte_count = 0;
2429 int forwarded_connect_retries = 0;
2430 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
2431 const struct forward_spec *fwd;
2432 struct http_request *http;
2433 int len; /* for buffer sizes (and negative error codes) */
2435 /* Function that does the content filtering for the current request */
2436 filter_function_ptr content_filter = NULL;
2438 /* Skeleton for HTTP response, if we should intercept the request */
2439 struct http_response *rsp;
2441 memset(buf, 0, sizeof(buf));
2445 if (receive_client_request(csp) != JB_ERR_OK)
2449 if (parse_client_request(csp) != JB_ERR_OK)
2454 /* decide how to route the HTTP request */
2455 fwd = forward_url(csp, http);
2458 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
2459 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2463 * build the http request to send to the server
2464 * we have to do one of the following:
2466 * create = use the original HTTP request to create a new
2467 * HTTP request that has either the path component
2468 * without the http://domainspec (w/path) or the
2469 * full orininal URL (w/url)
2470 * Note that the path and/or the HTTP version may
2471 * have been altered by now.
2473 * connect = Open a socket to the host:port of the server
2474 * and short-circuit server and client socket.
2476 * pass = Pass the request unchanged if forwarding a CONNECT
2477 * request to a parent proxy. Note that we'll be sending
2478 * the CFAIL message ourselves if connecting to the parent
2479 * fails, but we won't send a CSUCCEED message if it works,
2480 * since that would result in a double message (ours and the
2481 * parent's). After sending the request to the parent, we simply
2484 * here's the matrix:
2487 * +--------+--------+
2489 * 0 | create | connect|
2491 * Forwarding +--------+--------+
2493 * 1 | create | pass |
2495 * +--------+--------+
2499 if (http->ssl && connect_port_is_forbidden(csp))
2501 const char *acceptable_connect_ports =
2502 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
2503 assert(NULL != acceptable_connect_ports);
2504 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
2505 "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
2506 csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
2507 csp->action->flags |= ACTION_BLOCK;
2513 freez(csp->headers->first->str);
2514 build_request_line(csp, fwd, &csp->headers->first->str);
2517 hdr = list_to_text(csp->headers);
2520 /* FIXME Should handle error properly */
2521 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2525 * We have a request. Check if one of the crunchers wants it.
2527 if (crunch_response_triggered(csp, crunchers_all))
2530 * Yes. The client got the crunch response
2531 * and we are done here after cleaning up.
2534 list_remove_all(csp->headers);
2540 * The headers can't be removed earlier because
2541 * they were still needed for the referrer check
2542 * in case of CGI crunches.
2544 * XXX: Would it be worth to move the referrer check
2545 * into client_referrer() and set a flag if it's trusted?
2547 list_remove_all(csp->headers);
2549 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2551 if (fwd->forward_host)
2553 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2554 fwd->forward_host, fwd->forward_port, http->hostport);
2558 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2561 /* here we connect to the server, gateway, or the forwarder */
2563 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
2564 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2566 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
2567 forwarded_connect_retries, http->hostport);
2570 if (csp->sfd == JB_INVALID_SOCKET)
2572 if (fwd->type != SOCKS_NONE)
2575 rsp = error_response(csp, "forwarding-failed", errno);
2577 else if (errno == EINVAL)
2579 rsp = error_response(csp, "no-such-domain", errno);
2583 rsp = error_response(csp, "connect-failed", errno);
2584 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2588 /* Write the answer to the client */
2591 send_crunch_response(csp, rsp);
2598 if (fwd->forward_host || (http->ssl == 0))
2601 * Write the client's (modified) header to the server
2602 * (along with anything else that may be in the buffer)
2604 if (write_socket(csp->sfd, hdr, strlen(hdr))
2605 || (flush_socket(csp->sfd, csp->iob) < 0))
2607 log_error(LOG_LEVEL_CONNECT,
2608 "write header to: %s failed: %E", http->hostport);
2610 rsp = error_response(csp, "connect-failed", errno);
2613 send_crunch_response(csp, rsp);
2623 * We're running an SSL tunnel and we're not forwarding,
2624 * so just send the "connect succeeded" message to the
2625 * client, flush the rest, and get out of the way.
2627 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
2635 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2637 /* we're finished with the client's header */
2640 maxfd = (csp->cfd > csp->sfd) ? csp->cfd : csp->sfd;
2642 /* pass data between the client and server
2643 * until one or the other shuts down the connection.
2652 * FD_ZERO here seems to point to an errant macro which crashes.
2653 * So do this by hand for now...
2655 memset(&rfds,0x00,sizeof(fd_set));
2659 FD_SET(csp->cfd, &rfds);
2660 FD_SET(csp->sfd, &rfds);
2662 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2663 if (server_body && server_response_is_complete(csp, byte_count))
2665 log_error(LOG_LEVEL_CONNECT,
2666 "Done reading from server. Expected content length: %d. "
2667 "Actual content length: %d. Most recently received: %d.",
2668 csp->expected_content_length, byte_count, len);
2671 * XXX: should not jump around,
2672 * chat() is complicated enough already.
2676 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2678 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
2682 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2683 mark_server_socket_tainted(csp);
2688 * This is the body of the browser's request,
2689 * just read and write it.
2691 if (FD_ISSET(csp->cfd, &rfds))
2693 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2697 /* XXX: not sure if this is necessary. */
2698 mark_server_socket_tainted(csp);
2699 break; /* "game over, man" */
2702 if (write_socket(csp->sfd, buf, (size_t)len))
2704 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2705 mark_server_socket_tainted(csp);
2712 * The server wants to talk. It could be the header or the body.
2713 * If `hdr' is null, then it's the header otherwise it's the body.
2714 * FIXME: Does `hdr' really mean `host'? No.
2716 if (FD_ISSET(csp->sfd, &rfds))
2719 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2723 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2725 if (http->ssl && (fwd->forward_host == NULL))
2728 * Just hang up. We already confirmed the client's CONNECT
2729 * request with status code 200 and unencrypted content is
2730 * no longer welcome.
2732 log_error(LOG_LEVEL_ERROR,
2733 "CONNECT already confirmed. Unable to tell the client about the problem.");
2736 else if (byte_count)
2739 * Just hang up. We already transmitted the original headers
2740 * and parts of the original content and therefore missed the
2741 * chance to send an error message (without risking data corruption).
2743 * XXX: we could retry with a fancy range request here.
2745 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2746 "Unable to tell the client about the problem.");
2747 mark_server_socket_tainted(csp);
2751 rsp = error_response(csp, "connect-failed", errno);
2754 send_crunch_response(csp, rsp);
2760 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2761 if (csp->flags & CSP_FLAG_CHUNKED)
2763 if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2765 /* XXX: this is a temporary hack */
2766 log_error(LOG_LEVEL_CONNECT,
2767 "Looks like we reached the end of the last chunk. "
2768 "We better stop reading.");
2769 csp->expected_content_length = byte_count + (size_t)len;
2770 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2774 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2777 * Add a trailing zero to let be able to use string operations.
2778 * XXX: do we still need this with filter_popups gone?
2783 * Normally, this would indicate that we've read
2784 * as much as the server has sent us and we can
2785 * close the client connection. However, Microsoft
2786 * in its wisdom has released IIS/5 with a bug that
2787 * prevents it from sending the trailing \r\n in
2788 * a 302 redirect header (and possibly other headers).
2789 * To work around this if we've haven't parsed
2790 * a full header we'll append a trailing \r\n
2791 * and see if this now generates a valid one.
2793 * This hack shouldn't have any impacts. If we've
2794 * already transmitted the header or if this is a
2795 * SSL connection, then we won't bother with this
2796 * hack. So we only work on partially received
2797 * headers. If we append a \r\n and this still
2798 * doesn't generate a valid header, then we won't
2799 * transmit anything to the client.
2804 if (server_body || http->ssl)
2807 * If we have been buffering up the document,
2808 * now is the time to apply content modification
2809 * and send the result to the client.
2813 p = execute_content_filter(csp, content_filter);
2815 * If the content filter fails, use the original
2816 * buffer and length.
2817 * (see p != NULL ? p : csp->iob->cur below)
2821 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2824 if (JB_ERR_OK != update_server_headers(csp))
2826 log_error(LOG_LEVEL_FATAL,
2827 "Failed to update server headers. after filtering.");
2830 hdr = list_to_text(csp->headers);
2833 /* FIXME Should handle error properly */
2834 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2837 if (write_socket(csp->cfd, hdr, strlen(hdr))
2838 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
2840 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2843 mark_server_socket_tainted(csp);
2851 break; /* "game over, man" */
2855 * This is NOT the body, so
2856 * Let's pretend the server just sent us a blank line.
2858 snprintf(buf, sizeof(buf), "\r\n");
2859 len = (int)strlen(buf);
2862 * Now, let the normal header parsing algorithm below do its
2863 * job. If it fails, we'll exit instead of continuing.
2870 * If this is an SSL connection or we're in the body
2871 * of the server document, just write it to the client,
2872 * unless we need to buffer the body for later content-filtering
2874 if (server_body || http->ssl)
2879 * If there is no memory left for buffering the content, or the buffer limit
2880 * has been reached, switch to non-filtering mode, i.e. make & write the
2881 * header, flush the iob and buf, and get out of the way.
2883 if (add_to_iob(csp, buf, len))
2888 log_error(LOG_LEVEL_INFO,
2889 "Flushing header and buffers. Stepping back from filtering.");
2891 hdr = list_to_text(csp->headers);
2895 * Memory is too tight to even generate the header.
2896 * Send our static "Out-of-memory" page.
2898 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2899 rsp = cgi_error_memory();
2900 send_crunch_response(csp, rsp);
2901 mark_server_socket_tainted(csp);
2904 hdrlen = strlen(hdr);
2906 if (write_socket(csp->cfd, hdr, hdrlen)
2907 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
2908 || (write_socket(csp->cfd, buf, (size_t)len)))
2910 log_error(LOG_LEVEL_CONNECT,
2911 "Flush header and buffers to client failed: %E");
2913 mark_server_socket_tainted(csp);
2918 * Reset the byte_count to the amount of bytes
2919 * we just flushed. len will be added a few lines below,
2920 * hdrlen doesn't matter for LOG_LEVEL_CLF.
2922 byte_count = (size_t)flushed;
2924 content_filter = NULL;
2930 if (write_socket(csp->cfd, buf, (size_t)len))
2932 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2933 mark_server_socket_tainted(csp);
2937 byte_count += (size_t)len;
2942 const char *header_start;
2944 * We're still looking for the end of the server's header.
2945 * Buffer up the data we just read. If that fails, there's
2946 * little we can do but send our static out-of-memory page.
2948 if (add_to_iob(csp, buf, len))
2950 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2951 rsp = cgi_error_memory();
2952 send_crunch_response(csp, rsp);
2953 mark_server_socket_tainted(csp);
2957 header_start = csp->iob->cur;
2959 /* Convert iob into something sed() can digest */
2960 if (JB_ERR_PARSE == get_server_headers(csp))
2965 * Well, we tried our MS IIS/5 hack and it didn't work.
2966 * The header is incomplete and there isn't anything
2967 * we can do about it.
2969 log_error(LOG_LEVEL_INFO,
2970 "MS IIS5 hack didn't produce valid headers.");
2976 * Since we have to wait for more from the server before
2977 * we can parse the headers we just continue here.
2983 /* Did we actually get anything? */
2984 if (NULL == csp->headers->first)
2986 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
2987 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2988 write_socket(csp->cfd, NO_SERVER_DATA_RESPONSE, strlen(NO_SERVER_DATA_RESPONSE));
2989 free_http_request(http);
2990 mark_server_socket_tainted(csp);
2994 assert(csp->headers->first->str);
2996 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
2997 strncmpic(csp->headers->first->str, "ICY", 3))
3000 * It doesn't look like a HTTP (or Shoutcast) response:
3001 * tell the client and log the problem.
3003 if (strlen(csp->headers->first->str) > 30)
3005 csp->headers->first->str[30] = '\0';
3007 log_error(LOG_LEVEL_ERROR,
3008 "Invalid server or forwarder response. Starts with: %s",
3009 csp->headers->first->str);
3010 log_error(LOG_LEVEL_CLF,
3011 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3012 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
3013 strlen(INVALID_SERVER_HEADERS_RESPONSE));
3014 free_http_request(http);
3015 mark_server_socket_tainted(csp);
3020 * We have now received the entire server header,
3021 * filter it and send the result to the client
3023 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
3025 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
3027 hdr = list_to_text(csp->headers);
3030 /* FIXME Should handle error properly */
3031 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3034 if (crunch_response_triggered(csp, crunchers_light))
3037 * One of the tags created by a server-header
3038 * tagger triggered a crunch. We already
3039 * delivered the crunch response to the client
3040 * and are done here after cleaning up.
3043 mark_server_socket_tainted(csp);
3046 /* Buffer and pcrs filter this if appropriate. */
3048 if (!http->ssl) /* We talk plaintext */
3050 content_filter = get_filter_function(csp);
3053 * Only write if we're not buffering for content modification
3055 if (!content_filter)
3058 * Write the server's (modified) header to
3059 * the client (along with anything else that
3060 * may be in the buffer)
3063 if (write_socket(csp->cfd, hdr, strlen(hdr))
3064 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
3066 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
3069 * The write failed, so don't bother mentioning it
3070 * to the client... it probably can't hear us anyway.
3073 mark_server_socket_tainted(csp);
3077 byte_count += (size_t)len;
3082 * XXX: the header lenght should probably
3083 * be calculated by get_server_headers().
3085 int header_length = csp->iob->cur - header_start;
3086 assert(csp->iob->cur > header_start);
3087 byte_count += (size_t)(len - header_length);
3090 /* we're finished with the server's header */
3096 * If this was a MS IIS/5 hack then it means the server
3097 * has already closed the connection. Nothing more to read.
3102 log_error(LOG_LEVEL_INFO,
3103 "Closed server connection detected with MS IIS5 hack enabled.");
3109 mark_server_socket_tainted(csp);
3110 return; /* huh? we should never get here */
3113 if (csp->content_length == 0)
3116 * If Privoxy didn't recalculate the Content-Lenght,
3117 * byte_count is still correct.
3119 csp->content_length = byte_count;
3122 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3123 && (csp->expected_content_length != byte_count))
3125 log_error(LOG_LEVEL_ERROR,
3126 "Received %d bytes while expecting %d.",
3127 byte_count, csp->expected_content_length);
3128 mark_server_socket_tainted(csp);
3131 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
3132 csp->ip_addr_str, http->ocmd, csp->content_length);
3136 /*********************************************************************
3140 * Description : This is little more than chat. We only "serve" to
3141 * to close any socket that chat may have opened.
3144 * 1 : csp = Current client state (buffers, headers, etc...)
3148 *********************************************************************/
3150 void serve(struct client_state *csp)
3151 #else /* ifndef AMIGA */
3152 static void serve(struct client_state *csp)
3153 #endif /* def AMIGA */
3156 close_socket(csp->cfd);
3158 if (csp->sfd != JB_INVALID_SOCKET)
3160 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3161 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
3163 remember_connection(csp->sfd, csp->http, forward_url(csp, csp->http));
3167 forget_connection(csp->sfd);
3168 close_socket(csp->sfd);
3171 close_socket(csp->sfd);
3172 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3175 csp->flags &= ~CSP_FLAG_ACTIVE;
3181 /*********************************************************************
3183 * Function : server_thread
3185 * Description : We only exist to call `serve' in a threaded environment.
3188 * 1 : data = Current client state (buffers, headers, etc...)
3190 * Returns : Always 0.
3192 *********************************************************************/
3193 static int32 server_thread(void *data)
3195 serve((struct client_state *) data);
3202 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3203 /*********************************************************************
3207 * Description : Print usage info & exit.
3209 * Parameters : Pointer to argv[0] for identifying ourselves
3213 *********************************************************************/
3214 static void usage(const char *myname)
3216 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
3220 #endif /* defined(unix) */
3223 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
3224 #endif /* defined(unix) */
3225 "[--version] [configfile]\n"
3226 "Aborting\n", myname);
3231 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
3234 #ifdef MUTEX_LOCKS_AVAILABLE
3235 /*********************************************************************
3237 * Function : privoxy_mutex_lock
3239 * Description : Locks a mutex.
3242 * 1 : mutex = The mutex to lock.
3244 * Returns : Void. May exit in case of errors.
3246 *********************************************************************/
3247 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
3249 #ifdef FEATURE_PTHREAD
3250 int err = pthread_mutex_lock(mutex);
3253 if (mutex != &log_mutex)
3255 log_error(LOG_LEVEL_FATAL,
3256 "Mutex locking failed: %s.\n", strerror(err));
3261 EnterCriticalSection(mutex);
3262 #endif /* def FEATURE_PTHREAD */
3266 /*********************************************************************
3268 * Function : privoxy_mutex_unlock
3270 * Description : Unlocks a mutex.
3273 * 1 : mutex = The mutex to unlock.
3275 * Returns : Void. May exit in case of errors.
3277 *********************************************************************/
3278 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
3280 #ifdef FEATURE_PTHREAD
3281 int err = pthread_mutex_unlock(mutex);
3284 if (mutex != &log_mutex)
3286 log_error(LOG_LEVEL_FATAL,
3287 "Mutex unlocking failed: %s.\n", strerror(err));
3292 LeaveCriticalSection(mutex);
3293 #endif /* def FEATURE_PTHREAD */
3297 /*********************************************************************
3299 * Function : privoxy_mutex_init
3301 * Description : Prepares a mutex.
3304 * 1 : mutex = The mutex to initialize.
3306 * Returns : Void. May exit in case of errors.
3308 *********************************************************************/
3309 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
3311 #ifdef FEATURE_PTHREAD
3312 int err = pthread_mutex_init(mutex, 0);
3315 printf("Fatal error. Mutex initialization failed: %s.\n",
3320 InitializeCriticalSection(mutex);
3321 #endif /* def FEATURE_PTHREAD */
3323 #endif /* def MUTEX_LOCKS_AVAILABLE */
3325 /*********************************************************************
3327 * Function : initialize_mutexes
3329 * Description : Prepares mutexes if mutex support is available.
3333 * Returns : Void, exits in case of errors.
3335 *********************************************************************/
3336 static void initialize_mutexes(void)
3338 #ifdef MUTEX_LOCKS_AVAILABLE
3340 * Prepare global mutex semaphores
3342 privoxy_mutex_init(&log_mutex);
3343 privoxy_mutex_init(&log_init_mutex);
3344 privoxy_mutex_init(&connection_reuse_mutex);
3347 * XXX: The assumptions below are a bit naive
3348 * and can cause locks that aren't necessary.
3350 * For example older FreeBSD versions (< 6.x?)
3351 * have no gethostbyname_r, but gethostbyname is
3354 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
3355 privoxy_mutex_init(&resolver_mutex);
3356 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
3358 * XXX: should we use a single mutex for
3359 * localtime() and gmtime() as well?
3361 #ifndef HAVE_GMTIME_R
3362 privoxy_mutex_init(&gmtime_mutex);
3363 #endif /* ndef HAVE_GMTIME_R */
3365 #ifndef HAVE_LOCALTIME_R
3366 privoxy_mutex_init(&localtime_mutex);
3367 #endif /* ndef HAVE_GMTIME_R */
3370 privoxy_mutex_init(&rand_mutex);
3371 #endif /* ndef HAVE_RANDOM */
3372 #endif /* def MUTEX_LOCKS_AVAILABLE */
3376 /*********************************************************************
3380 * Description : Load the config file and start the listen loop.
3381 * This function is a lot more *sane* with the `load_config'
3382 * and `listen_loop' functions; although it stills does
3383 * a *little* too much for my taste.
3386 * 1 : argc = Number of parameters (including $0).
3387 * 2 : argv = Array of (char *)'s to the parameters.
3389 * Returns : 1 if : can't open config file, unrecognized directive,
3390 * stats requested in multi-thread mode, can't open the
3391 * log file, can't open the jar file, listen port is invalid,
3392 * any load fails, and can't bind port.
3394 * Else main never returns, the process must be signaled
3395 * to terminate execution. Or, on Windows, use the
3396 * "File", "Exit" menu option.
3398 *********************************************************************/
3400 int real_main(int argc, const char *argv[])
3402 int main(int argc, const char *argv[])
3406 unsigned int random_seed;
3408 struct passwd *pw = NULL;
3409 struct group *grp = NULL;
3412 char *pre_chroot_nslookup_to_load_resolver = NULL;
3419 #if !defined(_WIN32)
3427 * Parse the command line arguments
3429 * XXX: simply printing usage information in case of
3430 * invalid arguments isn't particularly user friendly.
3432 while (++argc_pos < argc)
3435 /* Check to see if the service must be installed or uninstalled */
3436 if (strncmp(argv[argc_pos], "--install", 9) == 0)
3438 const char *pName = argv[argc_pos] + 9;
3441 exit( (install_service(pName)) ? 0 : 1 );
3443 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
3445 const char *pName = argv[argc_pos] + 11;
3448 exit((uninstall_service(pName)) ? 0 : 1);
3450 else if (strcmp(argv[argc_pos], "--service" ) == 0)
3452 bRunAsService = TRUE;
3453 w32_set_service_cwd();
3454 atexit(w32_service_exit_notify);
3457 #endif /* defined(_WIN32) */
3460 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3462 if (strcmp(argv[argc_pos], "--help") == 0)
3467 else if(strcmp(argv[argc_pos], "--version") == 0)
3469 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
3475 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
3480 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
3482 if (++argc_pos == argc) usage(argv[0]);
3483 pidfile = strdup(argv[argc_pos]);
3486 else if (strcmp(argv[argc_pos], "--user" ) == 0)
3488 if (++argc_pos == argc) usage(argv[argc_pos]);
3490 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
3493 if (NULL == (grp = getgrnam(p)))
3495 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
3499 if (NULL == (pw = getpwnam(argv[argc_pos])))
3501 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
3504 if (p != NULL) *--p = '\0';
3507 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
3509 if (++argc_pos == argc) usage(argv[0]);
3510 pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
3513 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
3517 #endif /* defined(unix) */
3519 else if (argc_pos + 1 != argc)
3522 * This is neither the last command line
3523 * option, nor was it recognized before,
3524 * therefore it must be invalid.
3530 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3532 configfile = argv[argc_pos];
3535 } /* -END- while (more arguments) */
3538 if ( *configfile != '/' )
3540 char cwd[BUFFER_SIZE];
3542 size_t abs_file_size;
3544 /* make config-filename absolute here */
3545 if (NULL == getcwd(cwd, sizeof(cwd)))
3547 perror("failed to get current working directory");
3552 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3553 basedir = strdup(cwd);
3555 if (NULL == basedir ||
3556 NULL == (abs_file = malloc(abs_file_size)))
3558 perror("malloc failed");
3561 strlcpy(abs_file, basedir, abs_file_size);
3562 strlcat(abs_file, "/", abs_file_size );
3563 strlcat(abs_file, configfile, abs_file_size);
3564 configfile = abs_file;
3566 #endif /* defined unix */
3570 clients->next = NULL;
3572 /* XXX: factor out initialising after the next stable release. */
3575 #elif defined(_WIN32)
3579 /* Prepare mutexes if supported and necessary. */
3580 initialize_mutexes();
3582 /* Enable logging until further notice. */
3583 init_log_module(Argv[0]);
3585 random_seed = (unsigned int)time(NULL);
3587 srandom(random_seed);
3590 #endif /* ifdef HAVE_RANDOM */
3593 * Unix signal handling
3595 * Catch the abort, interrupt and terminate signals for a graceful exit
3596 * Catch the hangup signal so the errlog can be reopened.
3597 * Ignore the broken pipe signals (FIXME: Why?)
3599 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3602 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3603 const int ignored_signals[] = { SIGPIPE, 0 };
3605 for (idx = 0; catched_signals[idx] != 0; idx++)
3607 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3608 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3610 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3611 #endif /* ifdef sun */
3613 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3617 for (idx = 0; ignored_signals[idx] != 0; idx++)
3619 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3621 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3626 #else /* ifdef _WIN32 */
3627 # ifdef _WIN_CONSOLE
3629 * We *are* in a windows console app.
3630 * Print a verbose messages about FAQ's and such
3632 printf("%s", win32_blurb);
3633 # endif /* def _WIN_CONSOLE */
3634 #endif /* def _WIN32 */
3637 /* Initialize the CGI subsystem */
3638 cgi_init_error_messages();
3641 * If runnig on unix and without the --nodaemon
3642 * option, become a daemon. I.e. fork, detach
3643 * from tty and get process group leadership
3656 if ( pid < 0 ) /* error */
3661 else if ( pid != 0 ) /* parent */
3666 * must check for errors
3667 * child died due to missing files aso
3670 wpid = waitpid( pid, &status, WNOHANG );
3679 /* Should be more portable, but not as well tested */
3684 #else /* ndef __FreeBSD__ */
3686 #endif /* ndef __FreeBSD__ */
3687 fd = open("/dev/tty", O_RDONLY);
3690 /* no error check here */
3691 ioctl( fd, TIOCNOTTY,0 );
3696 * stderr (fd 2) will be closed later on, when the
3697 * log file has been parsed.
3704 } /* -END- if (!no_daemon) */
3707 * As soon as we have written the PID file, we can switch
3708 * to the user and group ID indicated by the --user option
3714 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3716 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3722 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3724 /* Read the time zone file from /etc before doing chroot. */
3726 if (NULL != pre_chroot_nslookup_to_load_resolver
3727 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3729 /* Initialize resolver library. */
3730 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3732 if (chroot(pw->pw_dir) < 0)
3734 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3738 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3741 if (setuid(pw->pw_uid))
3743 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3747 char putenv_dummy[64];
3749 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3750 if (putenv(putenv_dummy) != 0)
3752 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3755 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3756 if (putenv(putenv_dummy) != 0)
3758 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3764 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3767 #endif /* defined unix */
3770 /* This will be FALSE unless the command line specified --service
3774 /* Yup, so now we must attempt to establish a connection
3775 * with the service dispatcher. This will only work if this
3776 * process was launched by the service control manager to
3777 * actually run as a service. If this isn't the case, i've
3778 * known it take around 30 seconds or so for the call to return.
3781 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3782 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3784 /* Service has run, and at this point is now being stopped, so just return */
3789 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3791 /* An error occurred. Usually it's because --service was wrongly specified
3792 * and we were unable to connect to the Service Control Dispatcher because
3793 * it wasn't expecting us and is therefore not listening.
3795 * For now, just continue below to call the listen_loop function.
3798 #endif /* def _WIN32 */
3808 /*********************************************************************
3810 * Function : bind_port_helper
3812 * Description : Bind the listen port. Handles logging, and aborts
3816 * 1 : config = Privoxy configuration. Specifies port
3819 * Returns : Port that was opened.
3821 *********************************************************************/
3822 static jb_socket bind_port_helper(struct configuration_spec * config)
3827 if (config->haddr == NULL)
3829 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3834 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3835 config->hport, config->haddr);
3838 result = bind_port(config->haddr, config->hport, &bfd);
3845 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3846 "There may be another Privoxy or some other "
3847 "proxy running on port %d",
3848 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
3849 config->hport, config->hport);
3852 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3853 "The hostname is not resolvable",
3854 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3857 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
3858 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3861 /* shouldn't get here */
3862 return JB_INVALID_SOCKET;
3865 config->need_bind = 0;
3872 /* Without this simple workaround we get this compiler warning from _beginthread
3873 * warning C4028: formal parameter 1 different from declaration
3875 void w32_service_listen_loop(void *p)
3879 #endif /* def _WIN32 */
3882 /*********************************************************************
3884 * Function : listen_loop
3886 * Description : bind the listen port and enter a "FOREVER" listening loop.
3892 *********************************************************************/
3893 static void listen_loop(void)
3895 struct client_state *csp = NULL;
3897 struct configuration_spec * config;
3899 config = load_config();
3901 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3903 * XXX: Should be relocated once it no
3904 * longer needs to emit log messages.
3906 initialize_reusable_connections();
3907 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3909 bfd = bind_port_helper(config);
3911 #ifdef FEATURE_GRACEFUL_TERMINATION
3912 while (!g_terminate)
3917 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
3918 while (waitpid(-1, NULL, WNOHANG) > 0)
3920 /* zombie children */
3922 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
3925 * Free data that was used by died threads
3931 * Re-open the errlog after HUP signal
3933 if (received_hup_signal)
3935 if (NULL != config->logfile)
3937 init_error_log(Argv[0], config->logfile);
3939 received_hup_signal = 0;
3943 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
3945 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
3949 csp->flags |= CSP_FLAG_ACTIVE;
3950 csp->sfd = JB_INVALID_SOCKET;
3952 csp->config = config = load_config();
3954 if ( config->need_bind )
3957 * Since we were listening to the "old port", we will not see
3958 * a "listen" param change until the next IJB request. So, at
3959 * least 1 more request must be made for us to find the new
3960 * setting. I am simply closing the old socket and binding the
3963 * Which-ever is correct, we will serve 1 more page via the
3964 * old settings. This should probably be a "show-proxy-args"
3965 * request. This should not be a so common of an operation
3966 * that this will hurt people's feelings.
3971 bfd = bind_port_helper(config);
3974 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
3976 if (!accept_connection(csp, bfd))
3978 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
3991 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
3994 #ifdef FEATURE_TOGGLE
3995 if (global_toggle_state)
3996 #endif /* def FEATURE_TOGGLE */
3998 csp->flags |= CSP_FLAG_TOGGLED_ON;
4001 if (run_loader(csp))
4003 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
4004 /* Never get here - LOG_LEVEL_FATAL causes program exit */
4008 if (block_acl(NULL,csp))
4010 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
4011 close_socket(csp->cfd);
4015 #endif /* def FEATURE_ACL */
4017 /* add it to the list of clients */
4018 csp->next = clients->next;
4019 clients->next = csp;
4021 if (config->multi_threaded)
4025 /* this is a switch () statment in the C preprocessor - ugh */
4026 #undef SELECTED_ONE_OPTION
4028 /* Use Pthreads in preference to native code */
4029 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
4030 #define SELECTED_ONE_OPTION
4032 pthread_t the_thread;
4033 pthread_attr_t attrs;
4035 pthread_attr_init(&attrs);
4036 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
4037 errno = pthread_create(&the_thread, &attrs,
4038 (void * (*)(void *))serve, csp);
4039 child_id = errno ? -1 : 0;
4040 pthread_attr_destroy(&attrs);
4044 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
4045 #define SELECTED_ONE_OPTION
4046 child_id = _beginthread(
4047 (void (*)(void *))serve,
4052 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
4053 #define SELECTED_ONE_OPTION
4054 child_id = _beginthread(
4055 (void(* _Optlink)(void*))serve,
4061 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
4062 #define SELECTED_ONE_OPTION
4064 thread_id tid = spawn_thread
4065 (server_thread, "server", B_NORMAL_PRIORITY, csp);
4067 if ((tid >= 0) && (resume_thread(tid) == B_OK))
4069 child_id = (int) tid;
4078 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
4079 #define SELECTED_ONE_OPTION
4080 csp->cfd = ReleaseSocket(csp->cfd, -1);
4083 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4084 NP_Output, Output(),
4085 NP_CloseOutput, FALSE,
4086 NP_Name, (ULONG)"privoxy child",
4090 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4091 NP_Output, Output(),
4092 NP_CloseOutput, FALSE,
4093 NP_Name, (ULONG)"privoxy child",
4094 NP_StackSize, 200*1024,
4100 ((struct Task *)child_id)->tc_UserData = csp;
4101 Signal((struct Task *)child_id, SIGF_SINGLE);
4106 #if !defined(SELECTED_ONE_OPTION)
4109 /* This block is only needed when using fork().
4110 * When using threads, the server thread was
4111 * created and run by the call to _beginthread().
4113 if (child_id == 0) /* child */
4116 #ifdef FEATURE_TOGGLE
4117 int inherited_toggle_state = global_toggle_state;
4118 #endif /* def FEATURE_TOGGLE */
4123 * If we've been toggled or we've blocked the request, tell Mom
4126 #ifdef FEATURE_TOGGLE
4127 if (inherited_toggle_state != global_toggle_state)
4129 rc |= RC_FLAG_TOGGLED;
4131 #endif /* def FEATURE_TOGGLE */
4133 #ifdef FEATURE_STATISTICS
4134 if (csp->flags & CSP_FLAG_REJECTED)
4136 rc |= RC_FLAG_BLOCKED;
4138 #endif /* ndef FEATURE_STATISTICS */
4142 else if (child_id > 0) /* parent */
4144 /* in a fork()'d environment, the parent's
4145 * copy of the client socket and the CSP
4149 #if !defined(_WIN32) && !defined(__CYGWIN__)
4151 wait( &child_status );
4154 * Evaluate child's return code: If the child has
4155 * - been toggled, toggle ourselves
4156 * - blocked its request, bump up the stats counter
4159 #ifdef FEATURE_TOGGLE
4160 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
4162 global_toggle_state = !global_toggle_state;
4164 #endif /* def FEATURE_TOGGLE */
4166 #ifdef FEATURE_STATISTICS
4168 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
4172 #endif /* def FEATURE_STATISTICS */
4174 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
4175 close_socket(csp->cfd);
4176 csp->flags &= ~CSP_FLAG_ACTIVE;
4180 #undef SELECTED_ONE_OPTION
4181 /* end of cpp switch () */
4183 if (child_id < 0) /* failed */
4185 char buf[BUFFER_SIZE];
4187 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
4189 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
4191 write_socket(csp->cfd, buf, strlen(buf));
4192 close_socket(csp->cfd);
4193 csp->flags &= ~CSP_FLAG_ACTIVE;
4204 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
4206 /* Clean up. Aim: free all memory (no leaks) */
4207 #ifdef FEATURE_GRACEFUL_TERMINATION
4209 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
4211 unload_current_config_file();
4212 unload_current_actions_file();
4213 unload_current_re_filterfile();
4214 #ifdef FEATURE_TRUST
4215 unload_current_trust_file();
4218 if (config->multi_threaded)
4225 } while ((clients->next != NULL) && (--i > 0));
4229 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
4240 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
4241 /* Cleanup - remove taskbar icon etc. */
4246 #endif /* FEATURE_GRACEFUL_TERMINATION */