1 const char jcc_rcs[] = "$Id: jcc.c,v 1.209 2008/11/27 09:44:04 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 1.209 2008/11/27 09:44:04 fabiankeil
37 * Cosmetics for the last commit: Don't watch out for
38 * the last chunk if the content isn't chunk-encoded or
39 * if we already determined the content length previously.
41 * Revision 1.208 2008/11/26 18:24:17 fabiankeil
42 * Recognize that the server response is complete if the
43 * last chunk is read together with the server headers.
46 * Revision 1.207 2008/11/25 17:25:16 fabiankeil
47 * Don't convert the client-header list to text until we need to.
49 * Revision 1.206 2008/11/23 17:00:11 fabiankeil
50 * Some more chat() cosmetics.
52 * Revision 1.205 2008/11/16 12:43:49 fabiankeil
53 * Turn keep-alive support into a runtime feature
54 * that is disabled by setting keep-alive-timeout
55 * to a negative value.
57 * Revision 1.204 2008/11/06 19:42:17 fabiankeil
58 * Fix last-chunk detection hack to also apply
59 * if buf[] contains nothing but the last-chunk.
61 * Revision 1.203 2008/11/06 18:34:35 fabiankeil
62 * Factor receive_client_request() and
63 * parse_client_request() out of chat().
65 * Revision 1.202 2008/11/02 18:40:34 fabiankeil
66 * If we received a different amount of data than we expected,
67 * log a warning and make sure the server socket isn't reused.
69 * Revision 1.201 2008/11/02 16:48:20 fabiankeil
70 * Revert revision 1.195 and try again.
72 * Revision 1.200 2008/10/26 16:53:18 fabiankeil
75 * Revision 1.199 2008/10/26 15:36:10 fabiankeil
76 * Remove two debug messages with LOG_LEVEL_INFO.
78 * Revision 1.198 2008/10/22 15:19:55 fabiankeil
79 * Once More, With Feeling: if there is no logfile
80 * because the user didn't specify one, we shouldn't
81 * call init_error_log() after receiving SIGHUP either.
83 * Revision 1.197 2008/10/20 17:02:40 fabiankeil
84 * If SIGHUP is received while we aren't running in daemon
85 * mode, calling init_error_log() would be a mistake.
87 * Revision 1.196 2008/10/16 09:16:41 fabiankeil
88 * - Fix two gcc44 conversion warnings.
89 * - Don't bother logging the last five bytes
92 * Revision 1.195 2008/10/13 16:04:37 fabiankeil
93 * Make sure we don't try to reuse tainted server sockets.
95 * Revision 1.194 2008/10/12 18:35:18 fabiankeil
96 * The last commit was a bit too ambitious, apparently the content
97 * length adjustment is only necessary if we aren't buffering.
99 * Revision 1.193 2008/10/12 15:57:35 fabiankeil
100 * Fix content length calculation if we read headers
101 * and the start of the body at once. Now that we have
102 * FEATURE_CONNECTION_KEEP_ALIVE, it actually matters.
104 * Revision 1.192 2008/10/11 18:19:14 fabiankeil
105 * Even more chat() cosmetics.
107 * Revision 1.191 2008/10/11 18:00:14 fabiankeil
108 * Reformat some comments in chat().
110 * Revision 1.190 2008/10/11 14:58:00 fabiankeil
111 * In case of chunk-encoded content, stop reading if
112 * the buffer looks like it ends with the last chunk.
114 * Revision 1.189 2008/10/11 09:53:00 fabiankeil
115 * Let server_response_is_complete() deal properly with
116 * content that is neither buffered nor read all at once.
118 * Revision 1.188 2008/10/09 18:21:41 fabiankeil
119 * Flush work-in-progress changes to keep outgoing connections
120 * alive where possible. Incomplete and mostly #ifdef'd out.
122 * Revision 1.187 2008/09/07 12:35:05 fabiankeil
123 * Add mutex lock support for _WIN32.
125 * Revision 1.186 2008/09/04 08:13:58 fabiankeil
126 * Prepare for critical sections on Windows by adding a
127 * layer of indirection before the pthread mutex functions.
129 * Revision 1.185 2008/08/30 12:03:07 fabiankeil
130 * Remove FEATURE_COOKIE_JAR.
132 * Revision 1.184 2008/08/22 15:34:45 fabiankeil
133 * - Silence LLVM/Clang complaint.
134 * - Make received_hup_signal static.
135 * - Hide definitions for basedir, pidfile and received_hup_signal
136 * from __EMX__ as they only seem to be used in case of #ifdef unix.
138 * Revision 1.183 2008/08/21 07:09:35 fabiankeil
139 * Accept Shoutcast responses again. Problem reported
140 * and fix suggested by Stefan in #2062860.
142 * Revision 1.182 2008/06/27 11:13:56 fabiankeil
143 * Fix possible NULL-pointer dereference reported
144 * by din_a4 in #2003937. Pointy hat to me.
146 * Revision 1.181 2008/05/21 15:47:15 fabiankeil
147 * Streamline sed()'s prototype and declare
148 * the header parse and add structures static.
150 * Revision 1.180 2008/05/21 15:26:32 fabiankeil
151 * - Mark csp as immutable for send_crunch_response().
152 * - Fix comment spelling.
154 * Revision 1.179 2008/05/20 20:13:32 fabiankeil
155 * Factor update_server_headers() out of sed(), ditch the
156 * first_run hack and make server_patterns_light static.
158 * Revision 1.178 2008/05/10 13:23:38 fabiankeil
159 * Don't provide get_header() with the whole client state
160 * structure when it only needs access to csp->iob.
162 * Revision 1.177 2008/05/10 11:51:12 fabiankeil
163 * Make the "read the rest of the headers" loop a bit more readable.
165 * Revision 1.176 2008/05/10 11:37:57 fabiankeil
166 * - Instead of logging when the IIS5 hack is enabled, log when it fails.
167 * - Remove useless comment.
169 * Revision 1.175 2008/05/09 18:53:59 fabiankeil
170 * Fix comment grammar.
172 * Revision 1.174 2008/05/07 18:05:53 fabiankeil
173 * Remove the pointless buffer in client_protocol_is_unsupported().
175 * Revision 1.173 2008/05/06 15:09:00 fabiankeil
176 * Least-effort fix for bug #1821930 (reported by Lee):
177 * If the response doesn't look like HTTP,
178 * tell the client and log the problem.
180 * Revision 1.172 2008/04/16 16:38:21 fabiankeil
181 * Don't pass the whole csp structure to flush_socket()
182 * when it only needs a file descriptor and a buffer.
184 * Revision 1.171 2008/03/27 18:27:25 fabiankeil
185 * Remove kill-popups action.
187 * Revision 1.170 2008/03/06 16:33:46 fabiankeil
188 * If limit-connect isn't used, don't limit CONNECT requests to port 443.
190 * Revision 1.169 2008/03/04 18:30:39 fabiankeil
191 * Remove the treat-forbidden-connects-like-blocks action. We now
192 * use the "blocked" page for forbidden CONNECT requests by default.
194 * Revision 1.168 2008/03/02 12:25:25 fabiankeil
195 * Also use shiny new connect_port_is_forbidden() in jcc.c.
197 * Revision 1.167 2008/02/23 16:57:12 fabiankeil
198 * Rename url_actions() to get_url_actions() and let it
199 * use the standard parameter ordering.
201 * Revision 1.166 2008/02/23 16:33:43 fabiankeil
202 * Let forward_url() use the standard parameter ordering
203 * and mark its second parameter immutable.
205 * Revision 1.165 2008/02/02 19:36:56 fabiankeil
206 * Remove the "Listening ... for local connections only" log message.
207 * Whether or not remote connections are able to reach Privoxy is up
208 * to the operating system.
210 * Revision 1.164 2007/12/16 18:32:46 fabiankeil
211 * Prevent the log messages for CONNECT requests to unacceptable
212 * ports from printing the limit-connect argument as [null] if
213 * limit-connect hasn't been explicitly enabled.
215 * Revision 1.163 2007/12/13 01:47:11 david__schmidt
216 * Make sure all console-mode apps get a usage() instance
218 * Revision 1.162 2007/12/06 17:54:57 fabiankeil
219 * Reword NO_SERVER_DATA_RESPONSE to make it harder
220 * to misunderstand what the message is all about.
222 * Revision 1.161 2007/12/04 19:44:22 fabiankeil
223 * Unbreak trustfile which previously didn't work without
224 * FEATURE_TOGGLE. Fixes BR#1843585, reported by Lee.
226 * Revision 1.160 2007/11/29 18:00:29 fabiankeil
227 * Plug memory leak. Spotted by Valgrind, triggered by
228 * Privoxy-Regression-Test feeding proxyfuzz.py.
230 * Revision 1.159 2007/11/24 14:34:09 fabiankeil
231 * In the HTTP snipplets, refer to the client as client.
233 * Revision 1.158 2007/11/11 16:44:17 fabiankeil
234 * Emit a log message when activating the MS IIS5 hack.
236 * Revision 1.157 2007/11/03 17:34:49 fabiankeil
237 * Log the "weak randomization factor" warning only
238 * once for mingw32 and provide some more details.
240 * Revision 1.156 2007/11/01 18:20:58 fabiankeil
241 * Initialize log module after initializing mutexes, future
242 * deadlocks in that code should now work cross-platform.
244 * Revision 1.155 2007/10/23 20:12:45 fabiankeil
245 * Fix first CSUCCEED line to end in \r\n as required by RFC1945.
246 * Reported by Bert van Leeuwen in BR#1818808.
248 * Revision 1.154 2007/10/19 17:00:08 fabiankeil
249 * Downgrade "Flushing header and buffers" message to LOG_LEVEL_INFO.
251 * Revision 1.153 2007/10/14 14:12:41 fabiankeil
252 * When in daemon mode, close stderr after the configuration file has been
253 * parsed the first time. If logfile isn't set, stop logging. Fixes BR#897436.
255 * Revision 1.152 2007/10/04 18:03:34 fabiankeil
256 * - Fix a crash when parsing invalid requests whose first header
257 * is rejected by get_header(). Regression (re?)introduced
258 * in r1.143 by yours truly.
259 * - Move ACTION_VANILLA_WAFER handling into parsers.c's
260 * client_cookie_adder() to make sure send-vanilla-wafer can be
261 * controlled through tags (and thus regression-tested).
263 * Revision 1.151 2007/09/29 10:21:16 fabiankeil
264 * - Move get_filter_function() from jcc.c to filters.c
265 * so the filter functions can be static.
266 * - Don't bother filtering body-less responses.
268 * Revision 1.150 2007/09/28 16:39:29 fabiankeil
269 * Execute content filters through execute_content_filter().
271 * Revision 1.149 2007/09/04 15:08:48 fabiankeil
272 * Initialize req to NULL to make sure it's defined if the
273 * first read_socket() call fails. Reported by icmp30.
275 * Revision 1.148 2007/08/26 16:47:13 fabiankeil
276 * Add Stephen Gildea's --pre-chroot-nslookup patch [#1276666],
277 * extensive comments moved to user manual.
279 * Revision 1.147 2007/08/25 14:42:40 fabiankeil
280 * Don't crash if a broken header filter wiped out the request line.
282 * Revision 1.146 2007/08/20 17:09:32 fabiankeil
283 * Fix byte_count calculation in case of flushes
284 * and don't parse the server headers a second time.
286 * Revision 1.145 2007/08/19 13:13:31 fabiankeil
287 * - If there's a connection problem after we already forwarded
288 * parts of the original content, just hang up. Fixes BR#1776724.
289 * - Fix warnings about unused code on mingw32.
290 * - In case of flushes, calculate the byte count
291 * less incorrectly (I think).
293 * Revision 1.144 2007/08/11 14:43:22 fabiankeil
294 * Add some more prototypes for static functions.
296 * Revision 1.143 2007/08/05 13:58:19 fabiankeil
297 * Comment out request_contains_null_bytes() until it's used again.
299 * Revision 1.142 2007/08/05 13:50:26 fabiankeil
300 * #1763173 from Stefan Huehner: s@const static@static const@
301 * and declare some more functions static.
303 * Revision 1.141 2007/08/04 09:56:23 fabiankeil
304 * - Log rejected CONNECT requests with LOG_LEVEL_INFO
305 * and explain why they were rejected in the first place.
306 * - Fix the LOG_LEVEL_CLF message for crunches of unallowed
307 * CONNECT requests. The request line was missing.
308 * - Add two more XXX reminders as we don't have enough already.
310 * Revision 1.140 2007/07/21 11:51:36 fabiankeil
311 * As Hal noticed, checking dispatch_cgi() as the last cruncher
312 * looks like a bug if CGI requests are blocked unintentionally,
313 * so don't do it unless the user enabled the new config option
314 * "allow-cgi-request-crunching".
316 * Revision 1.139 2007/07/14 07:46:41 fabiankeil
317 * - Allow to rewrite the request destination behind the client's back.
318 * - Turn the weird-looking unconditional for loop that
319 * reads the client request into a conditional while loop.
320 * Move the stuff that only runs once out of the loop.
321 * - Move parts of chat(), server_content_type() and the
322 * necessary stuff to fix BR#1750917 into get_filter_function().
324 * Revision 1.138 2007/06/03 18:45:18 fabiankeil
325 * Temporary workaround for BR#1730105.
327 * Revision 1.137 2007/06/01 18:16:36 fabiankeil
328 * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
329 * deadlocks and crashes on OpenBSD and possibly other OS with neither
330 * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
331 * Thanks to Ralf Horstmann for report and solution.
333 * Revision 1.136 2007/06/01 16:41:11 fabiankeil
334 * Add forward-override{} to change the forwarding settings through
335 * action sections. This is mainly interesting to forward different
336 * clients differently (for example based on User-Agent or request
339 * Revision 1.135 2007/05/24 17:03:50 fabiankeil
340 * - Let usage() mention the --chroot parameter.
341 * - Use read_socket() consistently and always leave
342 * the last buffer byte alone, even in cases where
343 * null termination (currently) doesn't matter.
345 * Revision 1.134 2007/05/16 14:59:46 fabiankeil
346 * - Fix config file loading on Unix if no config file is specified.
347 * Since r1.97 Privoxy would always interpret the last argument as
348 * config file, even if it's a valid command line option.
349 * - Abort in case of unrecognized command line options. Closes #1719696.
350 * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
351 * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
353 * Revision 1.133 2007/05/04 11:23:19 fabiankeil
354 * - Don't rerun crunchers that only depend on the request URL.
355 * - Don't count redirects and CGI requests as "blocked requests".
357 * Revision 1.132 2007/04/25 15:15:17 fabiankeil
358 * Support crunching based on tags created by server-header taggers.
360 * Revision 1.131 2007/04/22 13:24:50 fabiankeil
361 * Make HTTP snippets static (again). Add a Content-Type for those
362 * with content so the browser doesn't guess it based on the URL.
364 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
365 * Move crunching and request line rebuilding out of chat().
367 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
368 * Introduce tags as alternative way to specify which
369 * actions apply to a request. At the moment tags can be
370 * created based on client and server headers.
372 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
373 * Don't CLF-log CONNECT requests twice.
375 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
376 * Log the source address for ACL-related connection drops.
378 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
379 * New config option: enforce-blocks.
381 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
382 * - Move null byte check into separate function.
383 * - Don't confuse the client with error pages
384 * if a CONNECT request was already confirmed.
386 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
387 * Speed up NULL byte escaping and only log the complete
388 * NULL byte requests with header debugging enabled.
390 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
391 * Answer requests that contain NULL bytes with
392 * a custom response instead of waiting for more
393 * data until the client eventually hangs up.
395 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
396 * - Move delivery and logging of crunched responses
397 * from chat() into send_crunch_response().
398 * - Display the reason for generating http_responses.
399 * - Log the content length for LOG_LEVEL_CLF correctly
400 * (still incorrect for some fixed responses).
401 * - Reword an incorrect comment about
402 * treat-forbidden-connects-like-blocks violating
404 * - Add some log messages.
406 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
407 * Move mutex initialization into separate
408 * function and exit in case of errors.
410 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
411 * - Start to reduce chat()'s line count and move
412 * parts of it into separate functions.
413 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
415 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
416 * - Add Proxy-Agent header to HTTP snippets that are
417 * supposed to reach HTTP clients only.
418 * - Made a few CONNECT log messages more descriptive.
419 * - Catch completely empty server responses (as seen
420 * with Tor's fake ".noconnect" top level domain).
421 * - Use shiny new "forwarding-failed" template for socks errors.
423 * Revision 1.118 2007/01/07 07:43:43 joergs
424 * AmigaOS4 support added.
426 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
427 * Added config option accept-intercepted-requests
428 * and disabled it by default.
430 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
431 * Reverted parts of my last commit
432 * to keep error handling working.
434 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
435 * Fixed gcc43 conversion warnings.
437 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
438 * Fix -pedantic ISO C warning about converting
439 * from function pointer to object pointer.
441 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
442 * Silence compiler warning I introduced with my last commit.
444 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
445 * Mutex protect rand() if POSIX threading
446 * is used, warn the user if that's not possible
447 * and stop using it on _WIN32 where it could
450 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
451 * Don't prevent core dumps by catching SIGABRT.
452 * It's rude and makes debugging unreasonable painful.
454 * Revision 1.110 2006/12/13 14:52:53 etresoft
455 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
457 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
458 * Privoxy is now able to run as intercepting
459 * proxy in combination with any packet filter
460 * that does the port redirection. The destination
461 * is extracted from the "Host:" header which
462 * should be available for nearly all requests.
464 * Moved HTTP snipplets into jcc.c.
465 * Added error message for gopher proxy requests.
467 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
468 * Only unlink the pidfile if it's actually used.
470 * Change order of interception checks to make
471 * it possible to block or redirect requests for
474 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
475 * Make pthread mutex locking more generic. Instead of
476 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
477 * and use mutex locking unless there is an _r function
478 * available. Better safe than sorry.
480 * Fixes "./configure --disable-pthread" and should result
481 * in less threading-related problems on pthread-using platforms,
482 * but it still doesn't fix BR#1122404.
484 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
485 * Move pthread.h inclusion from jcc.c to jcc.h.
486 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
488 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
489 * Don't exit after receiving the second SIGHUP on Solaris.
491 * Fixes BR 1052235, but the same problem may exist on other
492 * systems. Once 3.0.6 is out we should use sigset()
493 * where available and see if it breaks anything.
495 * Revision 1.104 2006/09/23 13:26:38 roro
496 * Replace TABs by spaces in source code.
498 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
499 * Fix +redirect{}. Didn't work with -fast-redirects.
501 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
502 * Respond with 400 and a short text message
503 * if the client tries to use Privoxy as FTP proxy.
505 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
506 * Make number of retries in case of forwarded-connect problems
507 * a config file option (forwarded-connect-retries) and use 0 as
510 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
511 * Set random(3) seed.
513 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
514 * Follow the OpenBSD port's lead and protect the resolve
515 * functions on OpenBSD as well.
517 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
518 * --user fix. Only use the user as group if no group is specified.
519 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
521 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
522 * Windows service (re-)integration
526 * --install[:service_name]
527 * --uninstall[:service_name]
530 * They work as follows:
531 * --install will create a service for you and then terminate.
532 * By default the service name will be "privoxy" (without the quotes).
533 * However you can run multiple services if you wish, just by adding
534 * a colon and then a name (no spaces).
536 * --uninstall follows the exact same rules a --install.
538 * --service is used when the program is executed by the service
539 * control manager, and in normal circumstances would never be
540 * used as a command line argument.
542 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
543 * Windows service integration
545 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
546 * Incorporate Fabian Keil's patch work:
547 http://www.fabiankeil.de/sourcecode/privoxy/
549 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
550 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
551 * with what was really the latest development (the v_3_0_branch branch)
553 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
554 * Thanks to Jindrich Makovicka for a race condition fix for the log
555 * file. The race condition remains for non-pthread implementations.
556 * Reference patch #1175720.
558 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
559 * Add the ability to check jpeg images for invalid
560 * lengths of comment blocks. Defensive strategy
561 * against the exploit:
562 * Microsoft Security Bulletin MS04-028
563 * Buffer Overrun in JPEG Processing (GDI+) Could
564 * Allow Code Execution (833987)
565 * Enabled with +inspect-jpegs in actions files.
567 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
568 * - Fixed usage info for non-unix platforms
569 * - Fixed small cmdline parsing bug
571 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
572 * Diagnostics: Now preserve the returncode of pthread_create
573 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
575 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
576 * No longer ignore SIGCHLD. Fixes bug #769381
578 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
579 * Close jarfile on graceful exit, remove stray line
581 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
582 * Cosmetics: Killed a warning, a typo and an allocation left at exit
584 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
585 * No longer rely on non-POSIX.1 extensions of getcwd().
588 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
589 * Replaced setenv() by posix-compliant putenv()
590 * Thanks to Neil McCalden (nmcc AT users.sf.net).
592 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
593 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
595 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
596 * Clean-up and extension of improvements for forked mode:
597 * - Child's return code now consists of flags RC_FLAG_*
598 * - Reporting toggle to parent now properly #ifdef'ed
599 * - Children now report blocking to parent. This enables
600 * statistics in forked mode
602 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
603 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
604 * Children now report having been toggled through _exit(17), parents
605 * watch for that code and toggle themselves if found.
607 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
608 * Wrapping all *_r functions (the non-_r versions of them) with
609 * mutex semaphores for OSX. Hopefully this will take care of all
610 * of those pesky crash reports.
612 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
613 * Fixed two mostly harmless mem leaks
615 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
616 * Fix: Head of global clients list now initialized to NULL
618 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
619 * Added basic support for OPTIONS and TRACE HTTP methods:
620 * - New interceptor direct_response() added in chat().
621 * - sed() moved to earlier in the process, so that the
622 * Host: header is evaluated before actions and forwarding
625 * Revision 1.92 2002/05/08 16:00:46 oes
626 * Chat's buffer handling:
627 * - Fixed bug with unchecked out-of-mem conditions
628 * while reading client request & server headers
629 * - No longer predict if the buffer limit will be exceeded
630 * in the next read -- check add_to_iob's new
631 * return code. If buffer couldn't be extended
632 * (policy or out-of-mem) while
633 * - reading from client: abort
634 * - reading server headers: send error page
635 * - buffering server body for filter: flush,
636 * and if that fails: send error page
638 * Revision 1.91 2002/04/08 20:35:58 swa
641 * Revision 1.90 2002/04/02 14:57:28 oes
642 * Made sending wafers independent of FEATURE_COOKIE_JAR
644 * Revision 1.89 2002/03/31 17:18:59 jongfoster
645 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
647 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
648 * More compiler warning message maintenance
650 * Revision 1.87 2002/03/26 22:29:54 swa
651 * we have a new homepage!
653 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
654 * Workaround for closing the jarfile before load_config() comes around again
656 * Revision 1.85 2002/03/24 15:23:33 jongfoster
659 * Revision 1.84 2002/03/24 13:25:43 swa
660 * name change related issues
662 * Revision 1.83 2002/03/16 23:54:06 jongfoster
663 * Adding graceful termination feature, to help look for memory leaks.
664 * If you enable this (which, by design, has to be done by hand
665 * editing config.h) and then go to http://i.j.b/die, then the program
666 * will exit cleanly after the *next* request. It should free all the
667 * memory that was used.
669 * Revision 1.82 2002/03/13 00:27:05 jongfoster
672 * Revision 1.81 2002/03/12 01:42:50 oes
673 * Introduced modular filters
675 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
676 * OS/2 port maintenance:
677 * - Fixed EMX build - it had decayed a little
678 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
679 * substituted a memset for now.
681 * Revision 1.79 2002/03/09 20:03:52 jongfoster
682 * - Making various functions return int rather than size_t.
683 * (Undoing a recent change). Since size_t is unsigned on
684 * Windows, functions like read_socket that return -1 on
685 * error cannot return a size_t.
687 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
688 * crashes, and also frequently caused JB to jump to 100%
689 * CPU and stay there. (Because it thought it had just
690 * read ((unsigned)-1) == 4Gb of data...)
692 * - The signature of write_socket has changed, it now simply
693 * returns success=0/failure=nonzero.
695 * - Trying to get rid of a few warnings --with-debug on
696 * Windows, I've introduced a new type "jb_socket". This is
697 * used for the socket file descriptors. On Windows, this
698 * is SOCKET (a typedef for unsigned). Everywhere else, it's
699 * an int. The error value can't be -1 any more, so it's
700 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
701 * Windows it maps to the #define INVALID_SOCKET.)
703 * - The signature of bind_port has changed.
705 * Revision 1.78 2002/03/08 21:35:04 oes
706 * Added optional group supplement to --user option. Will now use default group of user if no group given
708 * Revision 1.77 2002/03/07 03:52:06 oes
709 * - Fixed compiler warnings etc
710 * - Improved handling of failed DNS lookups
712 * Revision 1.76 2002/03/06 22:54:35 jongfoster
713 * Automated function-comment nitpicking.
715 * Revision 1.75 2002/03/06 10:02:19 oes
716 * Fixed stupid bug when --user was not given
718 * Revision 1.74 2002/03/06 00:49:31 jongfoster
719 * Fixing warning on Windows
720 * Making #ifdefs that refer to the same variable consistently
721 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
723 * Revision 1.73 2002/03/05 23:57:30 hal9
724 * Stray character 's' on line 1618 was breaking build.
726 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
727 * - Re-enable OS/2 building after new parms were added
728 * - Fix false out of memory report when resolving CGI templates when no IP
729 * address is available of failed attempt (a la no such domain)
731 * Revision 1.71 2002/03/05 18:13:56 oes
732 * Added --user option
734 * Revision 1.70 2002/03/05 04:52:42 oes
735 * Deleted non-errlog debugging code
737 * Revision 1.69 2002/03/04 23:50:00 jongfoster
738 * Splitting off bind_port() call into bind_port_helper(), with
741 * Revision 1.68 2002/03/04 20:17:32 oes
744 * Revision 1.67 2002/03/04 18:18:57 oes
745 * - Removed _DEBUG mode
746 * - Cleand up cmdline parsing
747 * - Introduced --no-daemon, --pidfile options
748 * - Cleaned up signal handling:
749 * - Terminate cleanly on INT, TERM and ABRT
750 * - Schedule logfile for re-opening on HUP
751 * - Ignore CHLD and PIPE
752 * - Leave the rest with their default handlers
753 * - Uniform handler registration
754 * - Added usage() function
755 * - Played styleguide police
757 * Revision 1.66 2002/03/03 15:06:55 oes
758 * Re-enabled automatic config reloading
760 * Revision 1.65 2002/03/03 14:49:11 oes
761 * Fixed CLF logging: Now uses client's original HTTP request
763 * Revision 1.64 2002/03/03 09:18:03 joergs
764 * Made jumbjuster work on AmigaOS again.
766 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
767 * Clean up a little CRLF unpleasantness that suddenly appeared
769 * Revision 1.62 2002/02/20 23:17:23 jongfoster
770 * Detecting some out-of memory conditions and exiting with a log message.
772 * Revision 1.61 2002/01/17 21:01:52 jongfoster
773 * Moving all our URL and URL pattern parsing code to urlmatch.c.
775 * Revision 1.60 2001/12/30 14:07:32 steudten
776 * - Add signal handling (unix)
777 * - Add SIGHUP handler (unix)
778 * - Add creation of pidfile (unix)
779 * - Add action 'top' in rc file (RH)
780 * - Add entry 'SIGNALS' to manpage
781 * - Add exit message to logfile (unix)
783 * Revision 1.59 2001/12/13 14:07:18 oes
784 * Fixed Bug: 503 error page now sent OK
786 * Revision 1.58 2001/11/30 23:37:24 jongfoster
787 * Renaming the Win32 config file to config.txt - this is almost the
788 * same as the corresponding UNIX name "config"
790 * Revision 1.57 2001/11/16 00:47:43 jongfoster
791 * Changing the tty-disconnection code to use setsid().
793 * Revision 1.56 2001/11/13 20:20:54 jongfoster
794 * Tabs->spaces, fixing a bug with missing {} around an if()
796 * Revision 1.55 2001/11/13 20:14:53 jongfoster
797 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
799 * Revision 1.54 2001/11/07 00:03:14 steudten
800 * Give reliable return value if an error
801 * occurs not just 0 with new daemon mode.
803 * Revision 1.53 2001/11/05 21:41:43 steudten
804 * Add changes to be a real daemon just for unix os.
805 * (change cwd to /, detach from controlling tty, set
806 * process group and session leader to the own process.
808 * Add some fatal-error log message for failed malloc().
809 * Add '-d' if compiled with 'configure --with-debug' to
810 * enable debug output.
812 * Revision 1.52 2001/10/26 20:11:20 jongfoster
813 * Fixing type mismatch
815 * Revision 1.51 2001/10/26 17:38:28 oes
818 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
819 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
820 * threads to call select() simultaneously. So, it's time to do a real, live,
821 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
822 * (native). Both versions will work, but using __OS2__ offers multi-threading.
824 * Revision 1.49 2001/10/23 21:41:35 jongfoster
825 * Added call to initialize the (statically-allocated of course)
826 * "out of memory" CGI response.
828 * Revision 1.48 2001/10/10 19:56:46 jongfoster
829 * Moving some code that wasn't cookie-related out of an #ifdef
832 * Revision 1.47 2001/10/10 16:44:36 oes
833 * Added CONNECT destination port limitation check
835 * Revision 1.46 2001/10/08 15:17:41 oes
836 * Re-enabled SSL forwarding
838 * Revision 1.45 2001/10/07 15:42:11 oes
839 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
841 * Moved downgrading of the HTTP version from parse_http_request to
842 * chat(), since we can't decide if it is necessary before we have
843 * determined the actions for the URL. The HTTP command is now
844 * *always* re-built so the repairs need no longer be special-cased.
846 * filter_popups now gets a csp pointer so it can raise the new
847 * CSP_FLAG_MODIFIED flag.
851 * Added configurable size limit for the IOB. If the IOB grows so
852 * large that the next read would exceed the limit, the header
853 * is generated, and the header & unfiltered buffer are flushed
854 * to the client. Chat then continues in non-buffering,
855 * non-filtering body mode.
857 * Revision 1.44 2001/10/02 18:13:57 oes
860 * Revision 1.43 2001/10/02 15:32:13 oes
861 * Moved generation of hdr
863 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
864 * Cleaning up 2 compiler warnings on OS/2.
866 * Revision 1.41 2001/09/16 17:05:14 jongfoster
867 * Removing unused #include showarg.h
869 * Revision 1.40 2001/09/16 15:41:45 jongfoster
870 * Fixing signed/unsigned comparison warning.
872 * Revision 1.39 2001/09/16 13:21:27 jongfoster
873 * Changes to use new list functions.
875 * Revision 1.38 2001/09/16 13:01:46 jongfoster
876 * Removing redundant function call that zeroed zalloc()'d memory.
878 * Revision 1.37 2001/09/10 11:12:24 oes
879 * Deleted unused variable
881 * Revision 1.36 2001/09/10 10:56:15 oes
882 * Silenced compiler warnings
884 * Revision 1.35 2001/07/31 14:44:22 oes
885 * Deleted unused size parameter from filter_popups()
887 * Revision 1.34 2001/07/30 22:08:36 jongfoster
888 * Tidying up #defines:
889 * - All feature #defines are now of the form FEATURE_xxx
890 * - Permanently turned off WIN_GUI_EDIT
891 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
893 * Revision 1.33 2001/07/29 19:32:00 jongfoster
894 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
896 * Revision 1.32 2001/07/29 18:47:05 jongfoster
897 * Adding missing #include "loadcfg.h"
899 * Revision 1.31 2001/07/29 12:17:48 oes
900 * Applied pthread fix by Paul Lieverse
902 * Revision 1.30 2001/07/25 22:57:13 jongfoster
903 * __BEOS__ no longer overrides FEATURE_PTHREAD.
904 * This is because FEATURE_PTHREAD will soon be widely used, so I
905 * want to keep it simple.
907 * Revision 1.29 2001/07/24 12:47:06 oes
908 * Applied BeOS support update by Eugenia
910 * Revision 1.28 2001/07/23 13:26:12 oes
911 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
913 * Revision 1.27 2001/07/19 19:09:47 haroon
914 * - Added code to take care of the situation where while processing the first
915 * server response (which includes the server header), after finding the end
916 * of the headers we were not looking past the end of the headers for
917 * content modification. I enabled it for filter_popups.
918 * Someone else should look to see if other similar operations should be
919 * done to the discarded portion of the buffer.
921 * Note 2001/07/20: No, the other content modification mechanisms will process
922 * the whole iob later anyway. --oes
924 * Revision 1.26 2001/07/18 12:31:36 oes
927 * Revision 1.25 2001/07/15 19:43:49 jongfoster
928 * Supports POSIX threads.
929 * Also removed some unused #includes.
931 * Revision 1.24 2001/07/13 14:00:40 oes
932 * - Generic content modification scheme:
933 * Each feature has its own applicability flag that is set
934 * from csp->action->flags.
935 * Replaced the "filtering" int flag , by a function pointer
936 * "content_filter" to the function that will do the content
937 * modification. If it is != NULL, the document will be buffered
938 * and processed through *content_filter, which must set
939 * csp->content_length and return a modified copy of the body
940 * or return NULL (on failiure).
941 * - Changed csp->is_text to the more generic bitmap csp->content_type
942 * which can currently take the valued CT_TEXT or CT_GIF
944 * - Removed all #ifdef PCRS
946 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
947 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
948 * the `block_acl' call. This prevents a compilation error when the user
949 * does not wish to use the "ACL" feature.
951 * Revision 1.22 2001/06/29 21:45:41 oes
952 * Indentation, CRLF->LF, Tab-> Space
954 * Revision 1.21 2001/06/29 13:29:36 oes
955 * - Cleaned up, improved comments
956 * - Unified all possible interceptors (CGI,
957 * block, trust, fast_redirect) in one
958 * place, with one (CGI) answer generation
959 * mechansim. Much clearer now.
960 * - Removed the GIF image generation, which
961 * is now done in filters.c:block_url()
962 * - Made error conditions like domain lookup
963 * failiure or (various) problems while talking
964 * to the server use cgi.c:error_response()
965 * instead of generating HTML/HTTP in chat() (yuck!)
966 * - Removed logentry from cancelled commit
968 * Revision 1.20 2001/06/09 10:55:28 jongfoster
969 * Changing BUFSIZ ==> BUFFER_SIZE
971 * Revision 1.19 2001/06/07 23:12:52 jongfoster
972 * Replacing function pointer in struct gateway with a directly
973 * called function forwarded_connect().
974 * Replacing struct gateway with struct forward_spec
976 * Revision 1.18 2001/06/03 19:12:16 oes
977 * introduced new cgi handling
979 * Revision 1.17 2001/06/01 20:07:23 jongfoster
980 * Now uses action +image-blocker{} rather than config->tinygif
982 * Revision 1.16 2001/06/01 18:49:17 jongfoster
983 * Replaced "list_share" with "list" - the tiny memory gain was not
984 * worth the extra complexity.
986 * Revision 1.15 2001/05/31 21:24:47 jongfoster
987 * Changed "permission" to "action" throughout.
988 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
989 * Moved vanilla wafer check into chat(), since we must now
990 * decide whether or not to add it based on the URL.
992 * Revision 1.14 2001/05/29 20:14:01 joergs
993 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
996 * Revision 1.13 2001/05/29 09:50:24 jongfoster
997 * Unified blocklist/imagelist/permissionslist.
998 * File format is still under discussion, but the internal changes
1001 * Also modified interceptor behaviour:
1002 * - We now intercept all URLs beginning with one of the following
1003 * prefixes (and *only* these prefixes):
1005 * * http://ijbswa.sf.net/config/
1006 * * http://ijbswa.sourceforge.net/config/
1007 * - New interceptors "home page" - go to http://i.j.b/ to see it.
1008 * - Internal changes so that intercepted and fast redirect pages
1009 * are not replaced with an image.
1010 * - Interceptors now have the option to send a binary page direct
1011 * to the client. (i.e. ijb-send-banner uses this)
1012 * - Implemented show-url-info interceptor. (Which is why I needed
1013 * the above interceptors changes - a typical URL is
1014 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
1015 * The previous mechanism would not have intercepted that, and
1016 * if it had been intercepted then it then it would have replaced
1017 * it with an image.)
1019 * Revision 1.12 2001/05/27 22:17:04 oes
1021 * - re_process_buffer no longer writes the modified buffer
1022 * to the client, which was very ugly. It now returns the
1023 * buffer, which it is then written by chat.
1025 * - content_length now adjusts the Content-Length: header
1026 * for modified documents rather than crunch()ing it.
1027 * (Length info in csp->content_length, which is 0 for
1028 * unmodified documents)
1030 * - For this to work, sed() is called twice when filtering.
1032 * Revision 1.11 2001/05/26 17:27:53 jongfoster
1033 * Added support for CLF and fixed LOG_LEVEL_LOG.
1034 * Also did CRLF->LF fix of my previous patch.
1036 * Revision 1.10 2001/05/26 15:26:15 jongfoster
1037 * ACL feature now provides more security by immediately dropping
1038 * connections from untrusted hosts.
1040 * Revision 1.9 2001/05/26 00:28:36 jongfoster
1041 * Automatic reloading of config file.
1042 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
1043 * Most of the global variables have been moved to a new
1044 * struct configuration_spec, accessed through csp->config->globalname
1045 * Most of the globals remaining are used by the Win32 GUI.
1047 * Revision 1.8 2001/05/25 22:43:18 jongfoster
1048 * Fixing minor memory leak and buffer overflow.
1050 * Revision 1.7 2001/05/25 22:34:30 jongfoster
1053 * Revision 1.6 2001/05/23 00:13:58 joergs
1054 * AmigaOS support fixed.
1056 * Revision 1.5 2001/05/22 18:46:04 oes
1058 * - Enabled filtering banners by size rather than URL
1059 * by adding patterns that replace all standard banner
1060 * sizes with the "Junkbuster" gif to the re_filterfile
1062 * - Enabled filtering WebBugs by providing a pattern
1063 * which kills all 1x1 images
1065 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
1066 * which is selected by the (nonstandard and therefore
1067 * capital) letter 'U' in the option string.
1068 * It causes the quantifiers to be ungreedy by default.
1069 * Appending a ? turns back to greedy (!).
1071 * - Added a new interceptor ijb-send-banner, which
1072 * sends back the "Junkbuster" gif. Without imagelist or
1073 * MSIE detection support, or if tinygif = 1, or the
1074 * URL isn't recognized as an imageurl, a lame HTML
1075 * explanation is sent instead.
1077 * - Added new feature, which permits blocking remote
1078 * script redirects and firing back a local redirect
1080 * The feature is conditionally compiled, i.e. it
1081 * can be disabled with --disable-fast-redirects,
1082 * plus it must be activated by a "fast-redirects"
1083 * line in the config file, has its own log level
1084 * and of course wants to be displayed by show-proxy-args
1085 * Note: Boy, all the #ifdefs in 1001 locations and
1086 * all the fumbling with configure.in and acconfig.h
1087 * were *way* more work than the feature itself :-(
1089 * - Because a generic redirect template was needed for
1090 * this, tinygif = 3 now uses the same.
1092 * - Moved GIFs, and other static HTTP response templates
1095 * - Some minor fixes
1097 * - Removed some >400 CRs again (Jon, you really worked
1100 * Revision 1.4 2001/05/21 19:34:01 jongfoster
1101 * Made failure to bind() a fatal error.
1103 * Revision 1.3 2001/05/20 01:21:20 jongfoster
1104 * Version 2.9.4 checkin.
1105 * - Merged popupfile and cookiefile, and added control over PCRS
1106 * filtering, in new "permissionsfile".
1107 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
1108 * file error you now get a message box (in the Win32 GUI) rather
1109 * than the program exiting with no explanation.
1110 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
1112 * - Removed tabs from "config"
1113 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
1114 * - Bumped up version number.
1116 * Revision 1.2 2001/05/17 22:34:44 oes
1117 * - Added hint on GIF char array generation to jcc.c
1118 * - Cleaned CRLF's from the sources and related files
1119 * - Repaired logging for REF and FRC
1121 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
1122 * Initial import of version 2.9.3 source tree
1125 *********************************************************************/
1131 #include <sys/types.h>
1140 # ifndef FEATURE_PTHREAD
1144 # include <windows.h>
1145 # include <process.h>
1146 # endif /* ndef FEATURE_PTHREAD */
1149 # ifndef _WIN_CONSOLE
1150 # include "w32log.h"
1151 # endif /* ndef _WIN_CONSOLE */
1152 # include "w32svrapi.h"
1154 #else /* ifndef _WIN32 */
1156 # if !defined (__OS2__)
1157 # include <unistd.h>
1158 # include <sys/wait.h>
1159 # endif /* ndef __OS2__ */
1160 # include <sys/time.h>
1161 # include <sys/stat.h>
1162 # include <sys/ioctl.h>
1165 #include <sys/termios.h>
1173 # include <signal.h>
1176 # include <socket.h> /* BeOS has select() for sockets only. */
1177 # include <OS.h> /* declarations for threads and stuff. */
1180 # if defined(__EMX__) || defined(__OS2__)
1181 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
1186 #define bzero(B,N) memset(B,0x00,n)
1190 # include <select.h>
1195 #include "project.h"
1198 #include "filters.h"
1199 #include "loaders.h"
1200 #include "parsers.h"
1201 #include "miscutil.h"
1203 #include "jbsockets.h"
1204 #include "gateway.h"
1205 #include "actions.h"
1207 #include "loadcfg.h"
1208 #include "urlmatch.h"
1210 const char jcc_h_rcs[] = JCC_H_VERSION;
1211 const char project_h_rcs[] = PROJECT_H_VERSION;
1214 struct client_state clients[1];
1215 struct file_list files[1];
1217 #ifdef FEATURE_STATISTICS
1218 int urls_read = 0; /* total nr of urls read inc rejected */
1219 int urls_rejected = 0; /* total nr of urls rejected */
1220 #endif /* def FEATURE_STATISTICS */
1222 #ifdef FEATURE_GRACEFUL_TERMINATION
1223 int g_terminate = 0;
1226 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1227 static void sig_handler(int the_signal);
1229 static int client_protocol_is_unsupported(const struct client_state *csp, char *req);
1230 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
1231 static jb_err get_server_headers(struct client_state *csp);
1232 static const char *crunch_reason(const struct http_response *rsp);
1233 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp);
1234 static char *get_request_line(struct client_state *csp);
1235 static jb_err receive_client_request(struct client_state *csp);
1236 static jb_err parse_client_request(struct client_state *csp);
1237 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
1238 static jb_err change_request_destination(struct client_state *csp);
1239 static void chat(struct client_state *csp);
1240 static void serve(struct client_state *csp);
1241 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1242 static void usage(const char *myname);
1244 static void initialize_mutexes(void);
1245 static jb_socket bind_port_helper(struct configuration_spec *config);
1246 static void listen_loop(void);
1249 void serve(struct client_state *csp);
1250 #else /* ifndef AMIGA */
1251 static void serve(struct client_state *csp);
1252 #endif /* def AMIGA */
1255 static int32 server_thread(void *data);
1256 #endif /* def __BEOS__ */
1259 #define sleep(N) Sleep(((N) * 1000))
1263 #define sleep(N) DosSleep(((N) * 100))
1266 #ifdef MUTEX_LOCKS_AVAILABLE
1268 * XXX: Does the locking stuff really belong in this file?
1270 privoxy_mutex_t log_mutex;
1271 privoxy_mutex_t log_init_mutex;
1272 privoxy_mutex_t connection_reuse_mutex;
1274 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
1275 privoxy_mutex_t resolver_mutex;
1276 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
1278 #ifndef HAVE_GMTIME_R
1279 privoxy_mutex_t gmtime_mutex;
1280 #endif /* ndef HAVE_GMTIME_R */
1282 #ifndef HAVE_LOCALTIME_R
1283 privoxy_mutex_t localtime_mutex;
1284 #endif /* ndef HAVE_GMTIME_R */
1287 privoxy_mutex_t rand_mutex;
1288 #endif /* ndef HAVE_RANDOM */
1290 #endif /* def MUTEX_LOCKS_AVAILABLE */
1293 const char *basedir = NULL;
1294 const char *pidfile = NULL;
1295 static int received_hup_signal = 0;
1296 #endif /* defined unix */
1298 /* HTTP snipplets. */
1299 static const char CSUCCEED[] =
1300 "HTTP/1.0 200 Connection established\r\n"
1301 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
1303 static const char CHEADER[] =
1304 "HTTP/1.0 400 Invalid header received from client\r\n"
1305 "Proxy-Agent: Privoxy " VERSION "\r\n"
1306 "Content-Type: text/plain\r\n"
1307 "Connection: close\r\n\r\n"
1308 "Invalid header received from client.\r\n";
1310 static const char FTP_RESPONSE[] =
1311 "HTTP/1.0 400 Invalid request received from client\r\n"
1312 "Content-Type: text/plain\r\n"
1313 "Connection: close\r\n\r\n"
1314 "Invalid request. Privoxy doesn't support FTP.\r\n";
1316 static const char GOPHER_RESPONSE[] =
1317 "HTTP/1.0 400 Invalid request received from client\r\n"
1318 "Content-Type: text/plain\r\n"
1319 "Connection: close\r\n\r\n"
1320 "Invalid request. Privoxy doesn't support gopher.\r\n";
1322 /* XXX: should be a template */
1323 static const char MISSING_DESTINATION_RESPONSE[] =
1324 "HTTP/1.0 400 Bad request received from client\r\n"
1325 "Proxy-Agent: Privoxy " VERSION "\r\n"
1326 "Content-Type: text/plain\r\n"
1327 "Connection: close\r\n\r\n"
1328 "Bad request. Privoxy was unable to extract the destination.\r\n";
1330 /* XXX: should be a template */
1331 static const char NO_SERVER_DATA_RESPONSE[] =
1332 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1333 "Proxy-Agent: Privoxy " VERSION "\r\n"
1334 "Content-Type: text/plain\r\n"
1335 "Connection: close\r\n\r\n"
1336 "Empty server or forwarder response.\r\n"
1337 "The connection has been closed but Privoxy didn't receive any data.\r\n";
1339 /* XXX: should be a template */
1340 static const char INVALID_SERVER_HEADERS_RESPONSE[] =
1341 "HTTP/1.0 502 Server or forwarder response invalid\r\n"
1342 "Proxy-Agent: Privoxy " VERSION "\r\n"
1343 "Content-Type: text/plain\r\n"
1344 "Connection: close\r\n\r\n"
1345 "Bad response. The server or forwarder response doesn't look like HTTP.\r\n";
1348 /* XXX: should be a template */
1349 static const char NULL_BYTE_RESPONSE[] =
1350 "HTTP/1.0 400 Bad request received from client\r\n"
1351 "Proxy-Agent: Privoxy " VERSION "\r\n"
1352 "Content-Type: text/plain\r\n"
1353 "Connection: close\r\n\r\n"
1354 "Bad request. Null byte(s) before end of request.\r\n";
1357 /* XXX: should be a template */
1358 static const char MESSED_UP_REQUEST_RESPONSE[] =
1359 "HTTP/1.0 400 Malformed request after rewriting\r\n"
1360 "Proxy-Agent: Privoxy " VERSION "\r\n"
1361 "Content-Type: text/plain\r\n"
1362 "Connection: close\r\n\r\n"
1363 "Bad request. Messed up with header filters.\r\n";
1365 /* A function to crunch a response */
1366 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
1368 /* Crunch function flags */
1369 #define CF_NO_FLAGS 0
1370 /* Cruncher applies to forced requests as well */
1371 #define CF_IGNORE_FORCE 1
1372 /* Crunched requests are counted for the block statistics */
1373 #define CF_COUNT_AS_REJECT 2
1375 /* A crunch function and its flags */
1378 const crunch_func_ptr cruncher;
1382 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
1384 /* Complete list of cruncher functions */
1385 static const struct cruncher crunchers_all[] = {
1386 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
1387 { block_url, CF_COUNT_AS_REJECT },
1388 #ifdef FEATURE_TRUST
1389 { trust_url, CF_COUNT_AS_REJECT },
1390 #endif /* def FEATURE_TRUST */
1391 { redirect_url, CF_NO_FLAGS },
1392 { dispatch_cgi, CF_IGNORE_FORCE},
1396 /* Light version, used after tags are applied */
1397 static const struct cruncher crunchers_light[] = {
1398 { block_url, CF_COUNT_AS_REJECT },
1399 { redirect_url, CF_NO_FLAGS },
1405 * XXX: Don't we really mean
1411 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1412 /*********************************************************************
1414 * Function : sig_handler
1416 * Description : Signal handler for different signals.
1417 * Exit gracefully on TERM and INT
1418 * or set a flag that will cause the errlog
1419 * to be reopened by the main thread on HUP.
1422 * 1 : the_signal = the signal cause this function to call
1426 *********************************************************************/
1427 static void sig_handler(int the_signal)
1433 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1445 received_hup_signal = 1;
1451 * We shouldn't be here, unless we catch signals
1452 * in main() that we can't handle here!
1454 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1462 /*********************************************************************
1464 * Function : client_protocol_is_unsupported
1466 * Description : Checks if the client used a known unsupported
1467 * protocol and deals with it by sending an error
1471 * 1 : csp = Current client state (buffers, headers, etc...)
1472 * 2 : req = the first request line send by the client
1474 * Returns : TRUE if an error response has been generated, or
1475 * FALSE if the request doesn't look invalid.
1477 *********************************************************************/
1478 static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1481 * If it's a FTP or gopher request, we don't support it.
1483 * These checks are better than nothing, but they might
1484 * not work in all configurations and some clients might
1485 * have problems digesting the answer.
1487 * They should, however, never cause more problems than
1488 * Privoxy's old behaviour (returning the misleading HTML
1491 * "Could not resolve http://(ftp|gopher)://example.org").
1493 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1495 const char *response = NULL;
1496 const char *protocol = NULL;
1498 if (!strncmpic(req, "GET ftp://", 10))
1500 response = FTP_RESPONSE;
1505 response = GOPHER_RESPONSE;
1506 protocol = "GOPHER";
1508 log_error(LOG_LEVEL_ERROR,
1509 "%s tried to use Privoxy as %s proxy: %s",
1510 csp->ip_addr_str, protocol, req);
1511 log_error(LOG_LEVEL_CLF,
1512 "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1514 write_socket(csp->cfd, response, strlen(response));
1523 /*********************************************************************
1525 * Function : get_request_destination_elsewhere
1527 * Description : If the client's request was redirected into
1528 * Privoxy without the client's knowledge,
1529 * the request line lacks the destination host.
1531 * This function tries to get it elsewhere,
1532 * provided accept-intercepted-requests is enabled.
1534 * "Elsewhere" currently only means "Host: header",
1535 * but in the future we may ask the redirecting
1536 * packet filter to look the destination up.
1538 * If the destination stays unknown, an error
1539 * response is send to the client and headers
1540 * are freed so that chat() can return directly.
1543 * 1 : csp = Current client state (buffers, headers, etc...)
1544 * 2 : headers = a header list
1546 * Returns : JB_ERR_OK if the destination is now known, or
1547 * JB_ERR_PARSE if it isn't.
1549 *********************************************************************/
1550 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1554 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1556 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1557 " Privoxy isn't configured to accept intercepted requests.",
1558 csp->ip_addr_str, csp->http->cmd);
1559 /* XXX: Use correct size */
1560 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1561 csp->ip_addr_str, csp->http->cmd);
1563 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1564 destroy_list(headers);
1566 return JB_ERR_PARSE;
1568 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1570 /* Split the domain we just got for pattern matching */
1571 init_domain_components(csp->http);
1577 /* We can't work without destination. Go spread the news.*/
1579 req = list_to_text(headers);
1581 /* XXX: Use correct size */
1582 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1583 csp->ip_addr_str, csp->http->cmd);
1584 log_error(LOG_LEVEL_ERROR,
1585 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1586 csp->ip_addr_str, csp->http->cmd, req);
1589 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
1590 destroy_list(headers);
1592 return JB_ERR_PARSE;
1595 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1596 * to get the destination IP address, use it as host directly
1597 * or do a reverse DNS lookup first.
1602 /*********************************************************************
1604 * Function : get_server_headers
1606 * Description : Parses server headers in iob and fills them
1607 * into csp->headers so that they can later be
1611 * 1 : csp = Current client state (buffers, headers, etc...)
1613 * Returns : JB_ERR_OK if everything went fine, or
1614 * JB_ERR_PARSE if the headers were incomplete.
1616 *********************************************************************/
1617 static jb_err get_server_headers(struct client_state *csp)
1619 int continue_hack_in_da_house = 0;
1622 while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
1627 * continue hack in da house. Ignore the ending of
1628 * this head and continue enlisting header lines.
1629 * The reason is described below.
1631 enlist(csp->headers, "");
1632 continue_hack_in_da_house = 0;
1635 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1638 * It's a bodyless continue response, don't
1639 * stop header parsing after reaching its end.
1641 * As a result Privoxy will concatenate the
1642 * next response's head and parse and deliver
1643 * the headers as if they belonged to one request.
1645 * The client will separate them because of the
1646 * empty line between them.
1648 * XXX: What we're doing here is clearly against
1649 * the intended purpose of the continue header,
1650 * and under some conditions (HTTP/1.0 client request)
1651 * it's a standard violation.
1653 * Anyway, "sort of against the spec" is preferable
1654 * to "always getting confused by Continue responses"
1655 * (Privoxy's behaviour before this hack was added)
1657 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1658 continue_hack_in_da_house = 1;
1660 else if (*header == '\0')
1663 * If the header is empty, but the Continue hack
1664 * isn't active, we can assume that we reached the
1665 * end of the buffer before we hit the end of the
1668 * Inform the caller an let it decide how to handle it.
1670 return JB_ERR_PARSE;
1673 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1676 * XXX: Should we quit the request and return a
1677 * out of memory error page instead?
1679 log_error(LOG_LEVEL_ERROR,
1680 "Out of memory while enlisting server headers. %s lost.",
1690 /*********************************************************************
1692 * Function : crunch_reason
1694 * Description : Translates the crunch reason code into a string.
1697 * 1 : rsp = a http_response
1699 * Returns : A string with the crunch reason or an error description.
1701 *********************************************************************/
1702 static const char *crunch_reason(const struct http_response *rsp)
1704 char * reason = NULL;
1706 assert(rsp != NULL);
1709 return "Internal error while searching for crunch reason";
1712 switch (rsp->reason)
1714 case RSP_REASON_UNSUPPORTED:
1715 reason = "Unsupported HTTP feature";
1717 case RSP_REASON_BLOCKED:
1720 case RSP_REASON_UNTRUSTED:
1721 reason = "Untrusted";
1723 case RSP_REASON_REDIRECTED:
1724 reason = "Redirected";
1726 case RSP_REASON_CGI_CALL:
1727 reason = "CGI Call";
1729 case RSP_REASON_NO_SUCH_DOMAIN:
1730 reason = "DNS failure";
1732 case RSP_REASON_FORWARDING_FAILED:
1733 reason = "Forwarding failed";
1735 case RSP_REASON_CONNECT_FAILED:
1736 reason = "Connection failure";
1738 case RSP_REASON_OUT_OF_MEMORY:
1739 reason = "Out of memory (may mask other reasons)";
1742 reason = "No reason recorded";
1750 /*********************************************************************
1752 * Function : send_crunch_response
1754 * Description : Delivers already prepared response for
1755 * intercepted requests, logs the interception
1756 * and frees the response.
1759 * 1 : csp = Current client state (buffers, headers, etc...)
1760 * 1 : rsp = Fully prepared response. Will be freed on exit.
1762 * Returns : Nothing.
1764 *********************************************************************/
1765 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp)
1767 const struct http_request *http = csp->http;
1768 char status_code[4];
1770 assert(rsp != NULL);
1771 assert(rsp->head != NULL);
1776 * Not supposed to happen. If it does
1777 * anyway, treat it as an unknown error.
1779 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1780 /* return code doesn't matter */
1785 /* If rsp is still NULL, we have serious internal problems. */
1786 log_error(LOG_LEVEL_FATAL,
1787 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1791 * Extract the status code from the actual head
1792 * that was send to the client. It is the only
1793 * way to get it right for all requests, including
1794 * the fixed ones for out-of-memory problems.
1796 * A head starts like this: 'HTTP/1.1 200...'
1800 status_code[0] = rsp->head[9];
1801 status_code[1] = rsp->head[10];
1802 status_code[2] = rsp->head[11];
1803 status_code[3] = '\0';
1805 /* Write the answer to the client */
1806 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1807 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1809 /* There is nothing we can do about it. */
1810 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1813 /* Log that the request was crunched and why. */
1814 log_error(LOG_LEVEL_GPC, "%s%s crunch! (%s)",
1815 http->hostport, http->path, crunch_reason(rsp));
1816 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %d",
1817 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1819 /* Clean up and return */
1820 if (cgi_error_memory() != rsp)
1822 free_http_response(rsp);
1829 /*********************************************************************
1831 * Function : request_contains_null_bytes
1833 * Description : Checks for NULL bytes in the request and sends
1834 * an error message to the client if any were found.
1836 * XXX: currently not used, see comment in chat().
1839 * 1 : csp = Current client state (buffers, headers, etc...)
1840 * 2 : buf = Data from the client's request to check.
1841 * 3 : len = The data length.
1843 * Returns : TRUE if the request contained one or more NULL bytes, or
1846 *********************************************************************/
1847 static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1849 size_t c_len; /* Request lenght when treated as C string */
1851 c_len = strlen(buf);
1856 * Null byte(s) found. Log the request,
1857 * return an error response and hang up.
1859 size_t tmp_len = c_len;
1864 * Replace NULL byte(s) with '°' characters
1865 * so the request can be logged as string.
1866 * XXX: Is there a better replacement character?
1869 tmp_len += strlen(buf+tmp_len);
1870 } while (tmp_len < len);
1872 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1873 "(length=%d, strlen=%d).", csp->ip_addr_str, len, c_len);
1874 log_error(LOG_LEVEL_HEADER,
1875 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1877 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
1879 /* XXX: Log correct size */
1880 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1890 /*********************************************************************
1892 * Function : crunch_response_triggered
1894 * Description : Checks if the request has to be crunched,
1895 * and delivers the crunch response if necessary.
1898 * 1 : csp = Current client state (buffers, headers, etc...)
1899 * 2 : crunchers = list of cruncher functions to run
1901 * Returns : TRUE if the request was answered with a crunch response
1904 *********************************************************************/
1905 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
1907 struct http_response *rsp = NULL;
1908 const struct cruncher *c;
1911 * If CGI request crunching is disabled,
1912 * check the CGI dispatcher out of order to
1913 * prevent unintentional blocks or redirects.
1915 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
1916 && (NULL != (rsp = dispatch_cgi(csp))))
1918 /* Deliver, log and free the interception response. */
1919 send_crunch_response(csp, rsp);
1923 for (c = crunchers; c->cruncher != NULL; c++)
1926 * Check the cruncher if either Privoxy is toggled
1927 * on and the request isn't forced, or if the cruncher
1928 * applies to forced requests as well.
1930 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
1931 !(csp->flags & CSP_FLAG_FORCED)) ||
1932 (c->flags & CF_IGNORE_FORCE))
1934 rsp = c->cruncher(csp);
1937 /* Deliver, log and free the interception response. */
1938 send_crunch_response(csp, rsp);
1939 #ifdef FEATURE_STATISTICS
1940 if (c->flags & CF_COUNT_AS_REJECT)
1942 csp->flags |= CSP_FLAG_REJECTED;
1944 #endif /* def FEATURE_STATISTICS */
1955 /*********************************************************************
1957 * Function : build_request_line
1959 * Description : Builds the HTTP request line.
1961 * If a HTTP forwarder is used it expects the whole URL,
1962 * web servers only get the path.
1965 * 1 : csp = Current client state (buffers, headers, etc...)
1966 * 2 : fwd = The forwarding spec used for the request
1967 * XXX: Should use http->fwd instead.
1968 * 3 : request_line = The old request line which will be replaced.
1970 * Returns : Nothing. Terminates in case of memory problems.
1972 *********************************************************************/
1973 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
1975 struct http_request *http = csp->http;
1977 assert(http->ssl == 0);
1980 * Downgrade http version from 1.1 to 1.0
1981 * if +downgrade action applies.
1983 if ( (csp->action->flags & ACTION_DOWNGRADE)
1984 && (!strcmpic(http->ver, "HTTP/1.1")))
1987 http->ver = strdup("HTTP/1.0");
1989 if (http->ver == NULL)
1991 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1996 * Rebuild the request line.
1998 freez(*request_line);
1999 *request_line = strdup(http->gpc);
2000 string_append(request_line, " ");
2002 if (fwd->forward_host)
2004 string_append(request_line, http->url);
2008 string_append(request_line, http->path);
2010 string_append(request_line, " ");
2011 string_append(request_line, http->ver);
2013 if (*request_line == NULL)
2015 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
2017 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
2021 /*********************************************************************
2023 * Function : change_request_destination
2025 * Description : Parse a (rewritten) request line and regenerate
2026 * the http request data.
2029 * 1 : csp = Current client state (buffers, headers, etc...)
2031 * Returns : Forwards the parse_http_request() return code.
2032 * Terminates in case of memory problems.
2034 *********************************************************************/
2035 static jb_err change_request_destination(struct client_state *csp)
2037 struct http_request *http = csp->http;
2040 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
2041 free_http_request(http);
2042 err = parse_http_request(csp->headers->first->str, http, csp);
2043 if (JB_ERR_OK != err)
2045 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
2046 jb_err_to_string(err));
2050 /* XXX: ocmd is a misleading name */
2051 http->ocmd = strdup(http->cmd);
2052 if (http->ocmd == NULL)
2054 log_error(LOG_LEVEL_FATAL,
2055 "Out of memory copying rewritten HTTP request line");
2063 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2064 /*********************************************************************
2066 * Function : server_response_is_complete
2068 * Description : Determines whether we should stop reading
2069 * from the server socket.
2072 * 1 : csp = Current client state (buffers, headers, etc...)
2073 * 2 : content_length = Length of content received so far.
2075 * Returns : TRUE if the response is complete,
2078 *********************************************************************/
2079 static int server_response_is_complete(struct client_state *csp, size_t content_length)
2081 int content_length_known = (csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
2083 if (!strcmpic(csp->http->gpc, "HEAD"))
2086 * "HEAD" implies no body, we are thus expecting
2087 * no content. XXX: incomplete "list" of methods?
2089 csp->expected_content_length = 0;
2090 content_length_known = TRUE;
2093 if (csp->http->status == 304)
2096 * Expect no body. XXX: incomplete "list" of status codes?
2098 csp->expected_content_length = 0;
2099 content_length_known = TRUE;
2102 return (content_length_known && ((0 == csp->expected_content_length)
2103 || (csp->expected_content_length <= content_length)));
2105 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2107 /*********************************************************************
2109 * Function : mark_server_socket_tainted
2111 * Description : Makes sure we don't reuse a server socket
2112 * (if we didn't read everything the server sent
2113 * us reusing the socket would lead to garbage).
2116 * 1 : csp = Current client state (buffers, headers, etc...)
2120 *********************************************************************/
2121 static void mark_server_socket_tainted(struct client_state *csp)
2123 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
2125 log_error(LOG_LEVEL_CONNECT, "Unsetting keep-alive flag.");
2126 csp->flags &= ~CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE;
2130 /*********************************************************************
2132 * Function : get_request_line
2134 * Description : Read the client request line.
2137 * 1 : csp = Current client state (buffers, headers, etc...)
2139 * Returns : Pointer to request line or NULL in case of errors.
2141 *********************************************************************/
2142 static char *get_request_line(struct client_state *csp)
2144 char buf[BUFFER_SIZE];
2145 char *request_line = NULL;
2148 memset(buf, 0, sizeof(buf));
2152 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2154 if (len <= 0) return NULL;
2157 * If there is no memory left for buffering the
2158 * request, there is nothing we can do but hang up
2160 if (add_to_iob(csp, buf, len))
2165 request_line = get_header(csp->iob);
2167 } while ((NULL != request_line) && ('\0' == *request_line));
2169 return request_line;
2174 /*********************************************************************
2176 * Function : receive_client_request
2178 * Description : Read the client's request (more precisely the
2179 * client headers) and answer it if necessary.
2181 * Note that since we're not using select() we could get
2182 * blocked here if a client connected, then didn't say
2186 * 1 : csp = Current client state (buffers, headers, etc...)
2188 * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
2190 *********************************************************************/
2191 static jb_err receive_client_request(struct client_state *csp)
2193 char buf[BUFFER_SIZE];
2196 struct http_request *http;
2200 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
2201 struct list header_list;
2202 struct list *headers = &header_list;
2206 memset(buf, 0, sizeof(buf));
2208 req = get_request_line(csp);
2210 if ((NULL != req) && ('\0' != *req))
2212 /* Request received. Validate and parse it. */
2214 /* Does the request line look invalid? */
2215 if (client_protocol_is_unsupported(csp, req))
2218 * Yes. The request has already been
2219 * answered with a error response, the buffers
2220 * were freed and we're done with chatting.
2222 return JB_ERR_PARSE;
2225 #ifdef FEATURE_FORCE_LOAD
2227 * If this request contains the FORCE_PREFIX and blocks
2228 * aren't enforced, get rid of it and set the force flag.
2230 if (strstr(req, FORCE_PREFIX))
2232 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
2234 log_error(LOG_LEVEL_FORCE,
2235 "Ignored force prefix in request: \"%s\".", req);
2239 strclean(req, FORCE_PREFIX);
2240 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
2241 csp->flags |= CSP_FLAG_FORCED;
2244 #endif /* def FEATURE_FORCE_LOAD */
2246 err = parse_http_request(req, http, csp);
2247 if (JB_ERR_OK != err)
2249 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", jb_err_to_string(err));
2255 if (http->cmd == NULL)
2257 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
2258 /* XXX: Use correct size */
2259 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2260 log_error(LOG_LEVEL_ERROR, "Invalid header received from %s.", csp->ip_addr_str);
2262 free_http_request(http);
2263 return JB_ERR_PARSE;
2266 /* grab the rest of the client's headers */
2270 p = get_header(csp->iob);
2274 /* There are no additional headers to read. */
2281 * We didn't receive a complete header
2282 * line yet, get the rest of it.
2284 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2287 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
2288 destroy_list(headers);
2289 return JB_ERR_PARSE;
2292 if (add_to_iob(csp, buf, len))
2295 * If there is no memory left for buffering the
2296 * request, there is nothing we can do but hang up
2298 destroy_list(headers);
2299 return JB_ERR_MEMORY;
2305 * We were able to read a complete
2306 * header and can finaly enlist it.
2313 if (http->host == NULL)
2316 * If we still don't know the request destination,
2317 * the request is invalid or the client uses
2318 * Privoxy without its knowledge.
2320 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
2323 * Our attempts to get the request destination
2324 * elsewhere failed or Privoxy is configured
2325 * to only accept proxy requests.
2327 * An error response has already been send
2328 * and we're done here.
2330 return JB_ERR_PARSE;
2335 * Determine the actions for this URL
2337 #ifdef FEATURE_TOGGLE
2338 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
2340 /* Most compatible set of actions (i.e. none) */
2341 init_current_action(csp->action);
2344 #endif /* ndef FEATURE_TOGGLE */
2346 get_url_actions(csp, http);
2350 * Save a copy of the original request for logging
2352 http->ocmd = strdup(http->cmd);
2353 if (http->ocmd == NULL)
2355 log_error(LOG_LEVEL_FATAL,
2356 "Out of memory copying HTTP request line");
2358 enlist(csp->headers, http->cmd);
2360 /* Append the previously read headers */
2361 list_append_list_unique(csp->headers, headers);
2362 destroy_list(headers);
2369 /*********************************************************************
2371 * Function : parse_client_request
2373 * Description : Parses the client's request and decides what to do
2376 * Note that since we're not using select() we could get
2377 * blocked here if a client connected, then didn't say
2381 * 1 : csp = Current client state (buffers, headers, etc...)
2383 * Returns : JB_ERR_OK or JB_ERR_PARSE
2385 *********************************************************************/
2386 static jb_err parse_client_request(struct client_state *csp)
2388 struct http_request *http = csp->http;
2391 err = sed(csp, FILTER_CLIENT_HEADERS);
2392 if (JB_ERR_OK != err)
2394 /* XXX: Should be handled in sed(). */
2395 assert(err == JB_ERR_PARSE);
2396 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers.");
2398 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2400 /* Check request line for rewrites. */
2401 if ((NULL == csp->headers->first->str)
2402 || (strcmp(http->cmd, csp->headers->first->str) &&
2403 (JB_ERR_OK != change_request_destination(csp))))
2406 * A header filter broke the request line - bail out.
2408 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
2409 /* XXX: Use correct size */
2410 log_error(LOG_LEVEL_CLF,
2411 "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
2412 log_error(LOG_LEVEL_ERROR,
2413 "Invalid request line after applying header filters.");
2414 free_http_request(http);
2416 return JB_ERR_PARSE;
2424 /*********************************************************************
2428 * Description : Once a connection to the client has been accepted,
2429 * this function is called (via serve()) to handle the
2430 * main business of the communication. When this
2431 * function returns, the caller must close the client
2434 * FIXME: chat is nearly thousand lines long.
2438 * 1 : csp = Current client state (buffers, headers, etc...)
2440 * Returns : Nothing.
2442 *********************************************************************/
2443 static void chat(struct client_state *csp)
2445 char buf[BUFFER_SIZE];
2452 int ms_iis5_hack = 0;
2453 size_t byte_count = 0;
2454 int forwarded_connect_retries = 0;
2455 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
2456 const struct forward_spec *fwd;
2457 struct http_request *http;
2458 int len; /* for buffer sizes (and negative error codes) */
2460 /* Function that does the content filtering for the current request */
2461 filter_function_ptr content_filter = NULL;
2463 /* Skeleton for HTTP response, if we should intercept the request */
2464 struct http_response *rsp;
2466 memset(buf, 0, sizeof(buf));
2470 if (receive_client_request(csp) != JB_ERR_OK)
2474 if (parse_client_request(csp) != JB_ERR_OK)
2479 /* decide how to route the HTTP request */
2480 fwd = forward_url(csp, http);
2483 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
2484 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2488 * build the http request to send to the server
2489 * we have to do one of the following:
2491 * create = use the original HTTP request to create a new
2492 * HTTP request that has either the path component
2493 * without the http://domainspec (w/path) or the
2494 * full orininal URL (w/url)
2495 * Note that the path and/or the HTTP version may
2496 * have been altered by now.
2498 * connect = Open a socket to the host:port of the server
2499 * and short-circuit server and client socket.
2501 * pass = Pass the request unchanged if forwarding a CONNECT
2502 * request to a parent proxy. Note that we'll be sending
2503 * the CFAIL message ourselves if connecting to the parent
2504 * fails, but we won't send a CSUCCEED message if it works,
2505 * since that would result in a double message (ours and the
2506 * parent's). After sending the request to the parent, we simply
2509 * here's the matrix:
2512 * +--------+--------+
2514 * 0 | create | connect|
2516 * Forwarding +--------+--------+
2518 * 1 | create | pass |
2520 * +--------+--------+
2524 if (http->ssl && connect_port_is_forbidden(csp))
2526 const char *acceptable_connect_ports =
2527 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
2528 assert(NULL != acceptable_connect_ports);
2529 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
2530 "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
2531 csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
2532 csp->action->flags |= ACTION_BLOCK;
2538 freez(csp->headers->first->str);
2539 build_request_line(csp, fwd, &csp->headers->first->str);
2543 * We have a request. Check if one of the crunchers wants it.
2545 if (crunch_response_triggered(csp, crunchers_all))
2548 * Yes. The client got the crunch response
2549 * and we are done here after cleaning up.
2551 /* XXX: why list_remove_all()? */
2552 list_remove_all(csp->headers);
2557 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2559 if (fwd->forward_host)
2561 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2562 fwd->forward_host, fwd->forward_port, http->hostport);
2566 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2569 /* here we connect to the server, gateway, or the forwarder */
2571 while ((csp->sfd = forwarded_connect(fwd, http, csp))
2572 && (errno == EINVAL)
2573 && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2575 log_error(LOG_LEVEL_ERROR,
2576 "failed request #%u to connect to %s. Trying again.",
2577 forwarded_connect_retries, http->hostport);
2580 if (csp->sfd == JB_INVALID_SOCKET)
2582 if (fwd->type != SOCKS_NONE)
2585 rsp = error_response(csp, "forwarding-failed", errno);
2587 else if (errno == EINVAL)
2589 rsp = error_response(csp, "no-such-domain", errno);
2593 rsp = error_response(csp, "connect-failed", errno);
2594 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2598 /* Write the answer to the client */
2601 send_crunch_response(csp, rsp);
2607 hdr = list_to_text(csp->headers);
2610 /* FIXME Should handle error properly */
2611 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2613 list_remove_all(csp->headers);
2615 if (fwd->forward_host || (http->ssl == 0))
2618 * Write the client's (modified) header to the server
2619 * (along with anything else that may be in the buffer)
2621 if (write_socket(csp->sfd, hdr, strlen(hdr))
2622 || (flush_socket(csp->sfd, csp->iob) < 0))
2624 log_error(LOG_LEVEL_CONNECT,
2625 "write header to: %s failed: %E", http->hostport);
2627 rsp = error_response(csp, "connect-failed", errno);
2630 send_crunch_response(csp, rsp);
2640 * We're running an SSL tunnel and we're not forwarding,
2641 * so just send the "connect succeeded" message to the
2642 * client, flush the rest, and get out of the way.
2644 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
2652 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2654 /* we're finished with the client's header */
2657 maxfd = (csp->cfd > csp->sfd) ? csp->cfd : csp->sfd;
2659 /* pass data between the client and server
2660 * until one or the other shuts down the connection.
2669 * FD_ZERO here seems to point to an errant macro which crashes.
2670 * So do this by hand for now...
2672 memset(&rfds,0x00,sizeof(fd_set));
2676 FD_SET(csp->cfd, &rfds);
2677 FD_SET(csp->sfd, &rfds);
2679 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2680 if ((csp->flags & CSP_FLAG_CHUNKED)
2681 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
2682 && ((csp->iob->eod - csp->iob->cur) >= 5)
2683 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
2685 log_error(LOG_LEVEL_CONNECT,
2686 "Looks like we read the last chunk together with "
2687 "the server headers. We better stop reading.");
2688 byte_count = (size_t)(csp->iob->eod - csp->iob->cur);
2689 csp->expected_content_length = byte_count;
2690 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2692 if (server_body && server_response_is_complete(csp, byte_count))
2694 log_error(LOG_LEVEL_CONNECT,
2695 "Done reading from server. Expected content length: %d. "
2696 "Actual content length: %d. Most recently received: %d.",
2697 csp->expected_content_length, byte_count, len);
2700 * XXX: should not jump around,
2701 * chat() is complicated enough already.
2705 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2707 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
2711 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2712 mark_server_socket_tainted(csp);
2717 * This is the body of the browser's request,
2718 * just read and write it.
2720 if (FD_ISSET(csp->cfd, &rfds))
2722 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2726 /* XXX: not sure if this is necessary. */
2727 mark_server_socket_tainted(csp);
2728 break; /* "game over, man" */
2731 if (write_socket(csp->sfd, buf, (size_t)len))
2733 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2734 mark_server_socket_tainted(csp);
2741 * The server wants to talk. It could be the header or the body.
2742 * If `hdr' is null, then it's the header otherwise it's the body.
2743 * FIXME: Does `hdr' really mean `host'? No.
2745 if (FD_ISSET(csp->sfd, &rfds))
2748 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2752 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2754 if (http->ssl && (fwd->forward_host == NULL))
2757 * Just hang up. We already confirmed the client's CONNECT
2758 * request with status code 200 and unencrypted content is
2759 * no longer welcome.
2761 log_error(LOG_LEVEL_ERROR,
2762 "CONNECT already confirmed. Unable to tell the client about the problem.");
2765 else if (byte_count)
2768 * Just hang up. We already transmitted the original headers
2769 * and parts of the original content and therefore missed the
2770 * chance to send an error message (without risking data corruption).
2772 * XXX: we could retry with a fancy range request here.
2774 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2775 "Unable to tell the client about the problem.");
2776 mark_server_socket_tainted(csp);
2780 rsp = error_response(csp, "connect-failed", errno);
2783 send_crunch_response(csp, rsp);
2789 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2790 if (csp->flags & CSP_FLAG_CHUNKED)
2792 if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2794 /* XXX: this is a temporary hack */
2795 log_error(LOG_LEVEL_CONNECT,
2796 "Looks like we reached the end of the last chunk. "
2797 "We better stop reading.");
2798 csp->expected_content_length = byte_count + (size_t)len;
2799 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2803 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2806 * Add a trailing zero to let be able to use string operations.
2807 * XXX: do we still need this with filter_popups gone?
2812 * Normally, this would indicate that we've read
2813 * as much as the server has sent us and we can
2814 * close the client connection. However, Microsoft
2815 * in its wisdom has released IIS/5 with a bug that
2816 * prevents it from sending the trailing \r\n in
2817 * a 302 redirect header (and possibly other headers).
2818 * To work around this if we've haven't parsed
2819 * a full header we'll append a trailing \r\n
2820 * and see if this now generates a valid one.
2822 * This hack shouldn't have any impacts. If we've
2823 * already transmitted the header or if this is a
2824 * SSL connection, then we won't bother with this
2825 * hack. So we only work on partially received
2826 * headers. If we append a \r\n and this still
2827 * doesn't generate a valid header, then we won't
2828 * transmit anything to the client.
2833 if (server_body || http->ssl)
2836 * If we have been buffering up the document,
2837 * now is the time to apply content modification
2838 * and send the result to the client.
2842 p = execute_content_filter(csp, content_filter);
2844 * If the content filter fails, use the original
2845 * buffer and length.
2846 * (see p != NULL ? p : csp->iob->cur below)
2850 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2853 if (JB_ERR_OK != update_server_headers(csp))
2855 log_error(LOG_LEVEL_FATAL,
2856 "Failed to update server headers. after filtering.");
2859 hdr = list_to_text(csp->headers);
2862 /* FIXME Should handle error properly */
2863 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2866 if (write_socket(csp->cfd, hdr, strlen(hdr))
2867 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
2869 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2872 mark_server_socket_tainted(csp);
2880 break; /* "game over, man" */
2884 * This is NOT the body, so
2885 * Let's pretend the server just sent us a blank line.
2887 snprintf(buf, sizeof(buf), "\r\n");
2888 len = (int)strlen(buf);
2891 * Now, let the normal header parsing algorithm below do its
2892 * job. If it fails, we'll exit instead of continuing.
2899 * If this is an SSL connection or we're in the body
2900 * of the server document, just write it to the client,
2901 * unless we need to buffer the body for later content-filtering
2903 if (server_body || http->ssl)
2908 * If there is no memory left for buffering the content, or the buffer limit
2909 * has been reached, switch to non-filtering mode, i.e. make & write the
2910 * header, flush the iob and buf, and get out of the way.
2912 if (add_to_iob(csp, buf, len))
2917 log_error(LOG_LEVEL_INFO,
2918 "Flushing header and buffers. Stepping back from filtering.");
2920 hdr = list_to_text(csp->headers);
2924 * Memory is too tight to even generate the header.
2925 * Send our static "Out-of-memory" page.
2927 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2928 rsp = cgi_error_memory();
2929 send_crunch_response(csp, rsp);
2930 mark_server_socket_tainted(csp);
2933 hdrlen = strlen(hdr);
2935 if (write_socket(csp->cfd, hdr, hdrlen)
2936 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
2937 || (write_socket(csp->cfd, buf, (size_t)len)))
2939 log_error(LOG_LEVEL_CONNECT,
2940 "Flush header and buffers to client failed: %E");
2942 mark_server_socket_tainted(csp);
2947 * Reset the byte_count to the amount of bytes
2948 * we just flushed. len will be added a few lines below,
2949 * hdrlen doesn't matter for LOG_LEVEL_CLF.
2951 byte_count = (size_t)flushed;
2953 content_filter = NULL;
2959 if (write_socket(csp->cfd, buf, (size_t)len))
2961 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2962 mark_server_socket_tainted(csp);
2966 byte_count += (size_t)len;
2971 const char *header_start;
2973 * We're still looking for the end of the server's header.
2974 * Buffer up the data we just read. If that fails, there's
2975 * little we can do but send our static out-of-memory page.
2977 if (add_to_iob(csp, buf, len))
2979 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2980 rsp = cgi_error_memory();
2981 send_crunch_response(csp, rsp);
2982 mark_server_socket_tainted(csp);
2986 header_start = csp->iob->cur;
2988 /* Convert iob into something sed() can digest */
2989 if (JB_ERR_PARSE == get_server_headers(csp))
2994 * Well, we tried our MS IIS/5 hack and it didn't work.
2995 * The header is incomplete and there isn't anything
2996 * we can do about it.
2998 log_error(LOG_LEVEL_INFO,
2999 "MS IIS5 hack didn't produce valid headers.");
3005 * Since we have to wait for more from the server before
3006 * we can parse the headers we just continue here.
3008 int header_offset = csp->iob->cur - header_start;
3009 assert(csp->iob->cur >= header_start);
3010 byte_count += (size_t)(len - header_offset);
3011 log_error(LOG_LEVEL_CONNECT, "Continuing buffering headers. "
3012 "byte_count: %d. header_offset: %d. len: %d.",
3013 byte_count, header_offset, len);
3018 /* Did we actually get anything? */
3019 if (NULL == csp->headers->first)
3021 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
3022 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3023 write_socket(csp->cfd, NO_SERVER_DATA_RESPONSE, strlen(NO_SERVER_DATA_RESPONSE));
3024 free_http_request(http);
3025 mark_server_socket_tainted(csp);
3029 assert(csp->headers->first->str);
3031 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
3032 strncmpic(csp->headers->first->str, "ICY", 3))
3035 * It doesn't look like a HTTP (or Shoutcast) response:
3036 * tell the client and log the problem.
3038 if (strlen(csp->headers->first->str) > 30)
3040 csp->headers->first->str[30] = '\0';
3042 log_error(LOG_LEVEL_ERROR,
3043 "Invalid server or forwarder response. Starts with: %s",
3044 csp->headers->first->str);
3045 log_error(LOG_LEVEL_CLF,
3046 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3047 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
3048 strlen(INVALID_SERVER_HEADERS_RESPONSE));
3049 free_http_request(http);
3050 mark_server_socket_tainted(csp);
3055 * We have now received the entire server header,
3056 * filter it and send the result to the client
3058 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
3060 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
3062 hdr = list_to_text(csp->headers);
3065 /* FIXME Should handle error properly */
3066 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3069 if (crunch_response_triggered(csp, crunchers_light))
3072 * One of the tags created by a server-header
3073 * tagger triggered a crunch. We already
3074 * delivered the crunch response to the client
3075 * and are done here after cleaning up.
3078 mark_server_socket_tainted(csp);
3081 /* Buffer and pcrs filter this if appropriate. */
3083 if (!http->ssl) /* We talk plaintext */
3085 content_filter = get_filter_function(csp);
3088 * Only write if we're not buffering for content modification
3090 if (!content_filter)
3093 * Write the server's (modified) header to
3094 * the client (along with anything else that
3095 * may be in the buffer)
3098 if (write_socket(csp->cfd, hdr, strlen(hdr))
3099 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
3101 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
3104 * The write failed, so don't bother mentioning it
3105 * to the client... it probably can't hear us anyway.
3108 mark_server_socket_tainted(csp);
3112 byte_count += (size_t)len;
3117 * XXX: the header lenght should probably
3118 * be calculated by get_server_headers().
3120 int header_length = csp->iob->cur - header_start;
3121 assert(csp->iob->cur > header_start);
3122 byte_count += (size_t)(len - header_length);
3125 /* we're finished with the server's header */
3131 * If this was a MS IIS/5 hack then it means the server
3132 * has already closed the connection. Nothing more to read.
3137 log_error(LOG_LEVEL_INFO,
3138 "Closed server connection detected with MS IIS5 hack enabled.");
3144 mark_server_socket_tainted(csp);
3145 return; /* huh? we should never get here */
3148 if (csp->content_length == 0)
3151 * If Privoxy didn't recalculate the Content-Lenght,
3152 * byte_count is still correct.
3154 csp->content_length = byte_count;
3157 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3158 && (csp->expected_content_length != byte_count))
3160 log_error(LOG_LEVEL_ERROR,
3161 "Received %d bytes while expecting %d.",
3162 byte_count, csp->expected_content_length);
3163 mark_server_socket_tainted(csp);
3166 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
3167 csp->ip_addr_str, http->ocmd, csp->content_length);
3171 /*********************************************************************
3175 * Description : This is little more than chat. We only "serve" to
3176 * to close any socket that chat may have opened.
3179 * 1 : csp = Current client state (buffers, headers, etc...)
3183 *********************************************************************/
3185 void serve(struct client_state *csp)
3186 #else /* ifndef AMIGA */
3187 static void serve(struct client_state *csp)
3188 #endif /* def AMIGA */
3191 close_socket(csp->cfd);
3193 if (csp->sfd != JB_INVALID_SOCKET)
3195 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3196 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
3197 && (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
3199 remember_connection(csp->sfd, csp->http, forward_url(csp, csp->http));
3203 forget_connection(csp->sfd);
3204 close_socket(csp->sfd);
3207 close_socket(csp->sfd);
3208 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3211 csp->flags &= ~CSP_FLAG_ACTIVE;
3217 /*********************************************************************
3219 * Function : server_thread
3221 * Description : We only exist to call `serve' in a threaded environment.
3224 * 1 : data = Current client state (buffers, headers, etc...)
3226 * Returns : Always 0.
3228 *********************************************************************/
3229 static int32 server_thread(void *data)
3231 serve((struct client_state *) data);
3238 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3239 /*********************************************************************
3243 * Description : Print usage info & exit.
3245 * Parameters : Pointer to argv[0] for identifying ourselves
3249 *********************************************************************/
3250 static void usage(const char *myname)
3252 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
3256 #endif /* defined(unix) */
3259 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
3260 #endif /* defined(unix) */
3261 "[--version] [configfile]\n"
3262 "Aborting\n", myname);
3267 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
3270 #ifdef MUTEX_LOCKS_AVAILABLE
3271 /*********************************************************************
3273 * Function : privoxy_mutex_lock
3275 * Description : Locks a mutex.
3278 * 1 : mutex = The mutex to lock.
3280 * Returns : Void. May exit in case of errors.
3282 *********************************************************************/
3283 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
3285 #ifdef FEATURE_PTHREAD
3286 int err = pthread_mutex_lock(mutex);
3289 if (mutex != &log_mutex)
3291 log_error(LOG_LEVEL_FATAL,
3292 "Mutex locking failed: %s.\n", strerror(err));
3297 EnterCriticalSection(mutex);
3298 #endif /* def FEATURE_PTHREAD */
3302 /*********************************************************************
3304 * Function : privoxy_mutex_unlock
3306 * Description : Unlocks a mutex.
3309 * 1 : mutex = The mutex to unlock.
3311 * Returns : Void. May exit in case of errors.
3313 *********************************************************************/
3314 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
3316 #ifdef FEATURE_PTHREAD
3317 int err = pthread_mutex_unlock(mutex);
3320 if (mutex != &log_mutex)
3322 log_error(LOG_LEVEL_FATAL,
3323 "Mutex unlocking failed: %s.\n", strerror(err));
3328 LeaveCriticalSection(mutex);
3329 #endif /* def FEATURE_PTHREAD */
3333 /*********************************************************************
3335 * Function : privoxy_mutex_init
3337 * Description : Prepares a mutex.
3340 * 1 : mutex = The mutex to initialize.
3342 * Returns : Void. May exit in case of errors.
3344 *********************************************************************/
3345 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
3347 #ifdef FEATURE_PTHREAD
3348 int err = pthread_mutex_init(mutex, 0);
3351 printf("Fatal error. Mutex initialization failed: %s.\n",
3356 InitializeCriticalSection(mutex);
3357 #endif /* def FEATURE_PTHREAD */
3359 #endif /* def MUTEX_LOCKS_AVAILABLE */
3361 /*********************************************************************
3363 * Function : initialize_mutexes
3365 * Description : Prepares mutexes if mutex support is available.
3369 * Returns : Void, exits in case of errors.
3371 *********************************************************************/
3372 static void initialize_mutexes(void)
3374 #ifdef MUTEX_LOCKS_AVAILABLE
3376 * Prepare global mutex semaphores
3378 privoxy_mutex_init(&log_mutex);
3379 privoxy_mutex_init(&log_init_mutex);
3380 privoxy_mutex_init(&connection_reuse_mutex);
3383 * XXX: The assumptions below are a bit naive
3384 * and can cause locks that aren't necessary.
3386 * For example older FreeBSD versions (< 6.x?)
3387 * have no gethostbyname_r, but gethostbyname is
3390 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
3391 privoxy_mutex_init(&resolver_mutex);
3392 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
3394 * XXX: should we use a single mutex for
3395 * localtime() and gmtime() as well?
3397 #ifndef HAVE_GMTIME_R
3398 privoxy_mutex_init(&gmtime_mutex);
3399 #endif /* ndef HAVE_GMTIME_R */
3401 #ifndef HAVE_LOCALTIME_R
3402 privoxy_mutex_init(&localtime_mutex);
3403 #endif /* ndef HAVE_GMTIME_R */
3406 privoxy_mutex_init(&rand_mutex);
3407 #endif /* ndef HAVE_RANDOM */
3408 #endif /* def MUTEX_LOCKS_AVAILABLE */
3412 /*********************************************************************
3416 * Description : Load the config file and start the listen loop.
3417 * This function is a lot more *sane* with the `load_config'
3418 * and `listen_loop' functions; although it stills does
3419 * a *little* too much for my taste.
3422 * 1 : argc = Number of parameters (including $0).
3423 * 2 : argv = Array of (char *)'s to the parameters.
3425 * Returns : 1 if : can't open config file, unrecognized directive,
3426 * stats requested in multi-thread mode, can't open the
3427 * log file, can't open the jar file, listen port is invalid,
3428 * any load fails, and can't bind port.
3430 * Else main never returns, the process must be signaled
3431 * to terminate execution. Or, on Windows, use the
3432 * "File", "Exit" menu option.
3434 *********************************************************************/
3436 int real_main(int argc, const char *argv[])
3438 int main(int argc, const char *argv[])
3442 unsigned int random_seed;
3444 struct passwd *pw = NULL;
3445 struct group *grp = NULL;
3448 char *pre_chroot_nslookup_to_load_resolver = NULL;
3455 #if !defined(_WIN32)
3463 * Parse the command line arguments
3465 * XXX: simply printing usage information in case of
3466 * invalid arguments isn't particularly user friendly.
3468 while (++argc_pos < argc)
3471 /* Check to see if the service must be installed or uninstalled */
3472 if (strncmp(argv[argc_pos], "--install", 9) == 0)
3474 const char *pName = argv[argc_pos] + 9;
3477 exit( (install_service(pName)) ? 0 : 1 );
3479 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
3481 const char *pName = argv[argc_pos] + 11;
3484 exit((uninstall_service(pName)) ? 0 : 1);
3486 else if (strcmp(argv[argc_pos], "--service" ) == 0)
3488 bRunAsService = TRUE;
3489 w32_set_service_cwd();
3490 atexit(w32_service_exit_notify);
3493 #endif /* defined(_WIN32) */
3496 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3498 if (strcmp(argv[argc_pos], "--help") == 0)
3503 else if(strcmp(argv[argc_pos], "--version") == 0)
3505 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
3511 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
3516 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
3518 if (++argc_pos == argc) usage(argv[0]);
3519 pidfile = strdup(argv[argc_pos]);
3522 else if (strcmp(argv[argc_pos], "--user" ) == 0)
3524 if (++argc_pos == argc) usage(argv[argc_pos]);
3526 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
3529 if (NULL == (grp = getgrnam(p)))
3531 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
3535 if (NULL == (pw = getpwnam(argv[argc_pos])))
3537 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
3540 if (p != NULL) *--p = '\0';
3543 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
3545 if (++argc_pos == argc) usage(argv[0]);
3546 pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
3549 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
3553 #endif /* defined(unix) */
3555 else if (argc_pos + 1 != argc)
3558 * This is neither the last command line
3559 * option, nor was it recognized before,
3560 * therefore it must be invalid.
3566 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3568 configfile = argv[argc_pos];
3571 } /* -END- while (more arguments) */
3574 if ( *configfile != '/' )
3576 char cwd[BUFFER_SIZE];
3578 size_t abs_file_size;
3580 /* make config-filename absolute here */
3581 if (NULL == getcwd(cwd, sizeof(cwd)))
3583 perror("failed to get current working directory");
3588 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3589 basedir = strdup(cwd);
3591 if (NULL == basedir ||
3592 NULL == (abs_file = malloc(abs_file_size)))
3594 perror("malloc failed");
3597 strlcpy(abs_file, basedir, abs_file_size);
3598 strlcat(abs_file, "/", abs_file_size );
3599 strlcat(abs_file, configfile, abs_file_size);
3600 configfile = abs_file;
3602 #endif /* defined unix */
3606 clients->next = NULL;
3608 /* XXX: factor out initialising after the next stable release. */
3611 #elif defined(_WIN32)
3615 /* Prepare mutexes if supported and necessary. */
3616 initialize_mutexes();
3618 /* Enable logging until further notice. */
3619 init_log_module(Argv[0]);
3621 random_seed = (unsigned int)time(NULL);
3623 srandom(random_seed);
3626 #endif /* ifdef HAVE_RANDOM */
3629 * Unix signal handling
3631 * Catch the abort, interrupt and terminate signals for a graceful exit
3632 * Catch the hangup signal so the errlog can be reopened.
3633 * Ignore the broken pipe signals (FIXME: Why?)
3635 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3638 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3639 const int ignored_signals[] = { SIGPIPE, 0 };
3641 for (idx = 0; catched_signals[idx] != 0; idx++)
3643 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3644 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3646 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3647 #endif /* ifdef sun */
3649 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3653 for (idx = 0; ignored_signals[idx] != 0; idx++)
3655 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3657 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3662 #else /* ifdef _WIN32 */
3663 # ifdef _WIN_CONSOLE
3665 * We *are* in a windows console app.
3666 * Print a verbose messages about FAQ's and such
3668 printf("%s", win32_blurb);
3669 # endif /* def _WIN_CONSOLE */
3670 #endif /* def _WIN32 */
3673 /* Initialize the CGI subsystem */
3674 cgi_init_error_messages();
3677 * If runnig on unix and without the --nodaemon
3678 * option, become a daemon. I.e. fork, detach
3679 * from tty and get process group leadership
3692 if ( pid < 0 ) /* error */
3697 else if ( pid != 0 ) /* parent */
3702 * must check for errors
3703 * child died due to missing files aso
3706 wpid = waitpid( pid, &status, WNOHANG );
3715 /* Should be more portable, but not as well tested */
3720 #else /* ndef __FreeBSD__ */
3722 #endif /* ndef __FreeBSD__ */
3723 fd = open("/dev/tty", O_RDONLY);
3726 /* no error check here */
3727 ioctl( fd, TIOCNOTTY,0 );
3732 * stderr (fd 2) will be closed later on, when the
3733 * log file has been parsed.
3740 } /* -END- if (!no_daemon) */
3743 * As soon as we have written the PID file, we can switch
3744 * to the user and group ID indicated by the --user option
3750 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3752 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3758 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3760 /* Read the time zone file from /etc before doing chroot. */
3762 if (NULL != pre_chroot_nslookup_to_load_resolver
3763 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3765 /* Initialize resolver library. */
3766 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3768 if (chroot(pw->pw_dir) < 0)
3770 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3774 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3777 if (setuid(pw->pw_uid))
3779 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3783 char putenv_dummy[64];
3785 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3786 if (putenv(putenv_dummy) != 0)
3788 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3791 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3792 if (putenv(putenv_dummy) != 0)
3794 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3800 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3803 #endif /* defined unix */
3806 /* This will be FALSE unless the command line specified --service
3810 /* Yup, so now we must attempt to establish a connection
3811 * with the service dispatcher. This will only work if this
3812 * process was launched by the service control manager to
3813 * actually run as a service. If this isn't the case, i've
3814 * known it take around 30 seconds or so for the call to return.
3817 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3818 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3820 /* Service has run, and at this point is now being stopped, so just return */
3825 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3827 /* An error occurred. Usually it's because --service was wrongly specified
3828 * and we were unable to connect to the Service Control Dispatcher because
3829 * it wasn't expecting us and is therefore not listening.
3831 * For now, just continue below to call the listen_loop function.
3834 #endif /* def _WIN32 */
3844 /*********************************************************************
3846 * Function : bind_port_helper
3848 * Description : Bind the listen port. Handles logging, and aborts
3852 * 1 : config = Privoxy configuration. Specifies port
3855 * Returns : Port that was opened.
3857 *********************************************************************/
3858 static jb_socket bind_port_helper(struct configuration_spec * config)
3863 if (config->haddr == NULL)
3865 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3870 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3871 config->hport, config->haddr);
3874 result = bind_port(config->haddr, config->hport, &bfd);
3881 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3882 "There may be another Privoxy or some other "
3883 "proxy running on port %d",
3884 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
3885 config->hport, config->hport);
3888 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3889 "The hostname is not resolvable",
3890 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3893 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
3894 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3897 /* shouldn't get here */
3898 return JB_INVALID_SOCKET;
3901 config->need_bind = 0;
3908 /* Without this simple workaround we get this compiler warning from _beginthread
3909 * warning C4028: formal parameter 1 different from declaration
3911 void w32_service_listen_loop(void *p)
3915 #endif /* def _WIN32 */
3918 /*********************************************************************
3920 * Function : listen_loop
3922 * Description : bind the listen port and enter a "FOREVER" listening loop.
3928 *********************************************************************/
3929 static void listen_loop(void)
3931 struct client_state *csp = NULL;
3933 struct configuration_spec * config;
3935 config = load_config();
3937 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3939 * XXX: Should be relocated once it no
3940 * longer needs to emit log messages.
3942 initialize_reusable_connections();
3943 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3945 bfd = bind_port_helper(config);
3947 #ifdef FEATURE_GRACEFUL_TERMINATION
3948 while (!g_terminate)
3953 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
3954 while (waitpid(-1, NULL, WNOHANG) > 0)
3956 /* zombie children */
3958 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
3961 * Free data that was used by died threads
3967 * Re-open the errlog after HUP signal
3969 if (received_hup_signal)
3971 if (NULL != config->logfile)
3973 init_error_log(Argv[0], config->logfile);
3975 received_hup_signal = 0;
3979 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
3981 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
3985 csp->flags |= CSP_FLAG_ACTIVE;
3986 csp->sfd = JB_INVALID_SOCKET;
3988 csp->config = config = load_config();
3990 if ( config->need_bind )
3993 * Since we were listening to the "old port", we will not see
3994 * a "listen" param change until the next IJB request. So, at
3995 * least 1 more request must be made for us to find the new
3996 * setting. I am simply closing the old socket and binding the
3999 * Which-ever is correct, we will serve 1 more page via the
4000 * old settings. This should probably be a "show-proxy-args"
4001 * request. This should not be a so common of an operation
4002 * that this will hurt people's feelings.
4007 bfd = bind_port_helper(config);
4010 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
4012 if (!accept_connection(csp, bfd))
4014 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
4027 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
4030 #ifdef FEATURE_TOGGLE
4031 if (global_toggle_state)
4032 #endif /* def FEATURE_TOGGLE */
4034 csp->flags |= CSP_FLAG_TOGGLED_ON;
4037 if (run_loader(csp))
4039 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
4040 /* Never get here - LOG_LEVEL_FATAL causes program exit */
4044 if (block_acl(NULL,csp))
4046 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
4047 close_socket(csp->cfd);
4051 #endif /* def FEATURE_ACL */
4053 /* add it to the list of clients */
4054 csp->next = clients->next;
4055 clients->next = csp;
4057 if (config->multi_threaded)
4061 /* this is a switch () statment in the C preprocessor - ugh */
4062 #undef SELECTED_ONE_OPTION
4064 /* Use Pthreads in preference to native code */
4065 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
4066 #define SELECTED_ONE_OPTION
4068 pthread_t the_thread;
4069 pthread_attr_t attrs;
4071 pthread_attr_init(&attrs);
4072 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
4073 errno = pthread_create(&the_thread, &attrs,
4074 (void * (*)(void *))serve, csp);
4075 child_id = errno ? -1 : 0;
4076 pthread_attr_destroy(&attrs);
4080 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
4081 #define SELECTED_ONE_OPTION
4082 child_id = _beginthread(
4083 (void (*)(void *))serve,
4088 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
4089 #define SELECTED_ONE_OPTION
4090 child_id = _beginthread(
4091 (void(* _Optlink)(void*))serve,
4097 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
4098 #define SELECTED_ONE_OPTION
4100 thread_id tid = spawn_thread
4101 (server_thread, "server", B_NORMAL_PRIORITY, csp);
4103 if ((tid >= 0) && (resume_thread(tid) == B_OK))
4105 child_id = (int) tid;
4114 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
4115 #define SELECTED_ONE_OPTION
4116 csp->cfd = ReleaseSocket(csp->cfd, -1);
4119 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4120 NP_Output, Output(),
4121 NP_CloseOutput, FALSE,
4122 NP_Name, (ULONG)"privoxy child",
4126 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4127 NP_Output, Output(),
4128 NP_CloseOutput, FALSE,
4129 NP_Name, (ULONG)"privoxy child",
4130 NP_StackSize, 200*1024,
4136 ((struct Task *)child_id)->tc_UserData = csp;
4137 Signal((struct Task *)child_id, SIGF_SINGLE);
4142 #if !defined(SELECTED_ONE_OPTION)
4145 /* This block is only needed when using fork().
4146 * When using threads, the server thread was
4147 * created and run by the call to _beginthread().
4149 if (child_id == 0) /* child */
4152 #ifdef FEATURE_TOGGLE
4153 int inherited_toggle_state = global_toggle_state;
4154 #endif /* def FEATURE_TOGGLE */
4159 * If we've been toggled or we've blocked the request, tell Mom
4162 #ifdef FEATURE_TOGGLE
4163 if (inherited_toggle_state != global_toggle_state)
4165 rc |= RC_FLAG_TOGGLED;
4167 #endif /* def FEATURE_TOGGLE */
4169 #ifdef FEATURE_STATISTICS
4170 if (csp->flags & CSP_FLAG_REJECTED)
4172 rc |= RC_FLAG_BLOCKED;
4174 #endif /* ndef FEATURE_STATISTICS */
4178 else if (child_id > 0) /* parent */
4180 /* in a fork()'d environment, the parent's
4181 * copy of the client socket and the CSP
4185 #if !defined(_WIN32) && !defined(__CYGWIN__)
4187 wait( &child_status );
4190 * Evaluate child's return code: If the child has
4191 * - been toggled, toggle ourselves
4192 * - blocked its request, bump up the stats counter
4195 #ifdef FEATURE_TOGGLE
4196 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
4198 global_toggle_state = !global_toggle_state;
4200 #endif /* def FEATURE_TOGGLE */
4202 #ifdef FEATURE_STATISTICS
4204 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
4208 #endif /* def FEATURE_STATISTICS */
4210 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
4211 close_socket(csp->cfd);
4212 csp->flags &= ~CSP_FLAG_ACTIVE;
4216 #undef SELECTED_ONE_OPTION
4217 /* end of cpp switch () */
4219 if (child_id < 0) /* failed */
4221 char buf[BUFFER_SIZE];
4223 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
4225 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
4227 write_socket(csp->cfd, buf, strlen(buf));
4228 close_socket(csp->cfd);
4229 csp->flags &= ~CSP_FLAG_ACTIVE;
4240 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
4242 /* Clean up. Aim: free all memory (no leaks) */
4243 #ifdef FEATURE_GRACEFUL_TERMINATION
4245 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
4247 unload_current_config_file();
4248 unload_current_actions_file();
4249 unload_current_re_filterfile();
4250 #ifdef FEATURE_TRUST
4251 unload_current_trust_file();
4254 if (config->multi_threaded)
4261 } while ((clients->next != NULL) && (--i > 0));
4265 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
4276 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
4277 /* Cleanup - remove taskbar icon etc. */
4282 #endif /* FEATURE_GRACEFUL_TERMINATION */