1 const char jcc_rcs[] = "$Id: jcc.c,v 1.212 2008/12/14 15:46:22 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 1.212 2008/12/14 15:46:22 fabiankeil
37 * Give crunched requests their own log level.
39 * Revision 1.211 2008/12/06 10:05:03 fabiankeil
40 * Downgrade "Received x bytes while expecting y." message to
41 * LOG_LEVEL_CONNECT as it doesn't necessarily indicate an error.
43 * Revision 1.210 2008/12/02 22:03:18 fabiankeil
44 * Don't miscalculate byte_count if we don't get all the
45 * server headers with one read_socket() call. With keep-alive
46 * support enabled, this caused delays until the server closed
49 * Revision 1.209 2008/11/27 09:44:04 fabiankeil
50 * Cosmetics for the last commit: Don't watch out for
51 * the last chunk if the content isn't chunk-encoded or
52 * if we already determined the content length previously.
54 * Revision 1.208 2008/11/26 18:24:17 fabiankeil
55 * Recognize that the server response is complete if the
56 * last chunk is read together with the server headers.
59 * Revision 1.207 2008/11/25 17:25:16 fabiankeil
60 * Don't convert the client-header list to text until we need to.
62 * Revision 1.206 2008/11/23 17:00:11 fabiankeil
63 * Some more chat() cosmetics.
65 * Revision 1.205 2008/11/16 12:43:49 fabiankeil
66 * Turn keep-alive support into a runtime feature
67 * that is disabled by setting keep-alive-timeout
68 * to a negative value.
70 * Revision 1.204 2008/11/06 19:42:17 fabiankeil
71 * Fix last-chunk detection hack to also apply
72 * if buf[] contains nothing but the last-chunk.
74 * Revision 1.203 2008/11/06 18:34:35 fabiankeil
75 * Factor receive_client_request() and
76 * parse_client_request() out of chat().
78 * Revision 1.202 2008/11/02 18:40:34 fabiankeil
79 * If we received a different amount of data than we expected,
80 * log a warning and make sure the server socket isn't reused.
82 * Revision 1.201 2008/11/02 16:48:20 fabiankeil
83 * Revert revision 1.195 and try again.
85 * Revision 1.200 2008/10/26 16:53:18 fabiankeil
88 * Revision 1.199 2008/10/26 15:36:10 fabiankeil
89 * Remove two debug messages with LOG_LEVEL_INFO.
91 * Revision 1.198 2008/10/22 15:19:55 fabiankeil
92 * Once More, With Feeling: if there is no logfile
93 * because the user didn't specify one, we shouldn't
94 * call init_error_log() after receiving SIGHUP either.
96 * Revision 1.197 2008/10/20 17:02:40 fabiankeil
97 * If SIGHUP is received while we aren't running in daemon
98 * mode, calling init_error_log() would be a mistake.
100 * Revision 1.196 2008/10/16 09:16:41 fabiankeil
101 * - Fix two gcc44 conversion warnings.
102 * - Don't bother logging the last five bytes
105 * Revision 1.195 2008/10/13 16:04:37 fabiankeil
106 * Make sure we don't try to reuse tainted server sockets.
108 * Revision 1.194 2008/10/12 18:35:18 fabiankeil
109 * The last commit was a bit too ambitious, apparently the content
110 * length adjustment is only necessary if we aren't buffering.
112 * Revision 1.193 2008/10/12 15:57:35 fabiankeil
113 * Fix content length calculation if we read headers
114 * and the start of the body at once. Now that we have
115 * FEATURE_CONNECTION_KEEP_ALIVE, it actually matters.
117 * Revision 1.192 2008/10/11 18:19:14 fabiankeil
118 * Even more chat() cosmetics.
120 * Revision 1.191 2008/10/11 18:00:14 fabiankeil
121 * Reformat some comments in chat().
123 * Revision 1.190 2008/10/11 14:58:00 fabiankeil
124 * In case of chunk-encoded content, stop reading if
125 * the buffer looks like it ends with the last chunk.
127 * Revision 1.189 2008/10/11 09:53:00 fabiankeil
128 * Let server_response_is_complete() deal properly with
129 * content that is neither buffered nor read all at once.
131 * Revision 1.188 2008/10/09 18:21:41 fabiankeil
132 * Flush work-in-progress changes to keep outgoing connections
133 * alive where possible. Incomplete and mostly #ifdef'd out.
135 * Revision 1.187 2008/09/07 12:35:05 fabiankeil
136 * Add mutex lock support for _WIN32.
138 * Revision 1.186 2008/09/04 08:13:58 fabiankeil
139 * Prepare for critical sections on Windows by adding a
140 * layer of indirection before the pthread mutex functions.
142 * Revision 1.185 2008/08/30 12:03:07 fabiankeil
143 * Remove FEATURE_COOKIE_JAR.
145 * Revision 1.184 2008/08/22 15:34:45 fabiankeil
146 * - Silence LLVM/Clang complaint.
147 * - Make received_hup_signal static.
148 * - Hide definitions for basedir, pidfile and received_hup_signal
149 * from __EMX__ as they only seem to be used in case of #ifdef unix.
151 * Revision 1.183 2008/08/21 07:09:35 fabiankeil
152 * Accept Shoutcast responses again. Problem reported
153 * and fix suggested by Stefan in #2062860.
155 * Revision 1.182 2008/06/27 11:13:56 fabiankeil
156 * Fix possible NULL-pointer dereference reported
157 * by din_a4 in #2003937. Pointy hat to me.
159 * Revision 1.181 2008/05/21 15:47:15 fabiankeil
160 * Streamline sed()'s prototype and declare
161 * the header parse and add structures static.
163 * Revision 1.180 2008/05/21 15:26:32 fabiankeil
164 * - Mark csp as immutable for send_crunch_response().
165 * - Fix comment spelling.
167 * Revision 1.179 2008/05/20 20:13:32 fabiankeil
168 * Factor update_server_headers() out of sed(), ditch the
169 * first_run hack and make server_patterns_light static.
171 * Revision 1.178 2008/05/10 13:23:38 fabiankeil
172 * Don't provide get_header() with the whole client state
173 * structure when it only needs access to csp->iob.
175 * Revision 1.177 2008/05/10 11:51:12 fabiankeil
176 * Make the "read the rest of the headers" loop a bit more readable.
178 * Revision 1.176 2008/05/10 11:37:57 fabiankeil
179 * - Instead of logging when the IIS5 hack is enabled, log when it fails.
180 * - Remove useless comment.
182 * Revision 1.175 2008/05/09 18:53:59 fabiankeil
183 * Fix comment grammar.
185 * Revision 1.174 2008/05/07 18:05:53 fabiankeil
186 * Remove the pointless buffer in client_protocol_is_unsupported().
188 * Revision 1.173 2008/05/06 15:09:00 fabiankeil
189 * Least-effort fix for bug #1821930 (reported by Lee):
190 * If the response doesn't look like HTTP,
191 * tell the client and log the problem.
193 * Revision 1.172 2008/04/16 16:38:21 fabiankeil
194 * Don't pass the whole csp structure to flush_socket()
195 * when it only needs a file descriptor and a buffer.
197 * Revision 1.171 2008/03/27 18:27:25 fabiankeil
198 * Remove kill-popups action.
200 * Revision 1.170 2008/03/06 16:33:46 fabiankeil
201 * If limit-connect isn't used, don't limit CONNECT requests to port 443.
203 * Revision 1.169 2008/03/04 18:30:39 fabiankeil
204 * Remove the treat-forbidden-connects-like-blocks action. We now
205 * use the "blocked" page for forbidden CONNECT requests by default.
207 * Revision 1.168 2008/03/02 12:25:25 fabiankeil
208 * Also use shiny new connect_port_is_forbidden() in jcc.c.
210 * Revision 1.167 2008/02/23 16:57:12 fabiankeil
211 * Rename url_actions() to get_url_actions() and let it
212 * use the standard parameter ordering.
214 * Revision 1.166 2008/02/23 16:33:43 fabiankeil
215 * Let forward_url() use the standard parameter ordering
216 * and mark its second parameter immutable.
218 * Revision 1.165 2008/02/02 19:36:56 fabiankeil
219 * Remove the "Listening ... for local connections only" log message.
220 * Whether or not remote connections are able to reach Privoxy is up
221 * to the operating system.
223 * Revision 1.164 2007/12/16 18:32:46 fabiankeil
224 * Prevent the log messages for CONNECT requests to unacceptable
225 * ports from printing the limit-connect argument as [null] if
226 * limit-connect hasn't been explicitly enabled.
228 * Revision 1.163 2007/12/13 01:47:11 david__schmidt
229 * Make sure all console-mode apps get a usage() instance
231 * Revision 1.162 2007/12/06 17:54:57 fabiankeil
232 * Reword NO_SERVER_DATA_RESPONSE to make it harder
233 * to misunderstand what the message is all about.
235 * Revision 1.161 2007/12/04 19:44:22 fabiankeil
236 * Unbreak trustfile which previously didn't work without
237 * FEATURE_TOGGLE. Fixes BR#1843585, reported by Lee.
239 * Revision 1.160 2007/11/29 18:00:29 fabiankeil
240 * Plug memory leak. Spotted by Valgrind, triggered by
241 * Privoxy-Regression-Test feeding proxyfuzz.py.
243 * Revision 1.159 2007/11/24 14:34:09 fabiankeil
244 * In the HTTP snipplets, refer to the client as client.
246 * Revision 1.158 2007/11/11 16:44:17 fabiankeil
247 * Emit a log message when activating the MS IIS5 hack.
249 * Revision 1.157 2007/11/03 17:34:49 fabiankeil
250 * Log the "weak randomization factor" warning only
251 * once for mingw32 and provide some more details.
253 * Revision 1.156 2007/11/01 18:20:58 fabiankeil
254 * Initialize log module after initializing mutexes, future
255 * deadlocks in that code should now work cross-platform.
257 * Revision 1.155 2007/10/23 20:12:45 fabiankeil
258 * Fix first CSUCCEED line to end in \r\n as required by RFC1945.
259 * Reported by Bert van Leeuwen in BR#1818808.
261 * Revision 1.154 2007/10/19 17:00:08 fabiankeil
262 * Downgrade "Flushing header and buffers" message to LOG_LEVEL_INFO.
264 * Revision 1.153 2007/10/14 14:12:41 fabiankeil
265 * When in daemon mode, close stderr after the configuration file has been
266 * parsed the first time. If logfile isn't set, stop logging. Fixes BR#897436.
268 * Revision 1.152 2007/10/04 18:03:34 fabiankeil
269 * - Fix a crash when parsing invalid requests whose first header
270 * is rejected by get_header(). Regression (re?)introduced
271 * in r1.143 by yours truly.
272 * - Move ACTION_VANILLA_WAFER handling into parsers.c's
273 * client_cookie_adder() to make sure send-vanilla-wafer can be
274 * controlled through tags (and thus regression-tested).
276 * Revision 1.151 2007/09/29 10:21:16 fabiankeil
277 * - Move get_filter_function() from jcc.c to filters.c
278 * so the filter functions can be static.
279 * - Don't bother filtering body-less responses.
281 * Revision 1.150 2007/09/28 16:39:29 fabiankeil
282 * Execute content filters through execute_content_filter().
284 * Revision 1.149 2007/09/04 15:08:48 fabiankeil
285 * Initialize req to NULL to make sure it's defined if the
286 * first read_socket() call fails. Reported by icmp30.
288 * Revision 1.148 2007/08/26 16:47:13 fabiankeil
289 * Add Stephen Gildea's --pre-chroot-nslookup patch [#1276666],
290 * extensive comments moved to user manual.
292 * Revision 1.147 2007/08/25 14:42:40 fabiankeil
293 * Don't crash if a broken header filter wiped out the request line.
295 * Revision 1.146 2007/08/20 17:09:32 fabiankeil
296 * Fix byte_count calculation in case of flushes
297 * and don't parse the server headers a second time.
299 * Revision 1.145 2007/08/19 13:13:31 fabiankeil
300 * - If there's a connection problem after we already forwarded
301 * parts of the original content, just hang up. Fixes BR#1776724.
302 * - Fix warnings about unused code on mingw32.
303 * - In case of flushes, calculate the byte count
304 * less incorrectly (I think).
306 * Revision 1.144 2007/08/11 14:43:22 fabiankeil
307 * Add some more prototypes for static functions.
309 * Revision 1.143 2007/08/05 13:58:19 fabiankeil
310 * Comment out request_contains_null_bytes() until it's used again.
312 * Revision 1.142 2007/08/05 13:50:26 fabiankeil
313 * #1763173 from Stefan Huehner: s@const static@static const@
314 * and declare some more functions static.
316 * Revision 1.141 2007/08/04 09:56:23 fabiankeil
317 * - Log rejected CONNECT requests with LOG_LEVEL_INFO
318 * and explain why they were rejected in the first place.
319 * - Fix the LOG_LEVEL_CLF message for crunches of unallowed
320 * CONNECT requests. The request line was missing.
321 * - Add two more XXX reminders as we don't have enough already.
323 * Revision 1.140 2007/07/21 11:51:36 fabiankeil
324 * As Hal noticed, checking dispatch_cgi() as the last cruncher
325 * looks like a bug if CGI requests are blocked unintentionally,
326 * so don't do it unless the user enabled the new config option
327 * "allow-cgi-request-crunching".
329 * Revision 1.139 2007/07/14 07:46:41 fabiankeil
330 * - Allow to rewrite the request destination behind the client's back.
331 * - Turn the weird-looking unconditional for loop that
332 * reads the client request into a conditional while loop.
333 * Move the stuff that only runs once out of the loop.
334 * - Move parts of chat(), server_content_type() and the
335 * necessary stuff to fix BR#1750917 into get_filter_function().
337 * Revision 1.138 2007/06/03 18:45:18 fabiankeil
338 * Temporary workaround for BR#1730105.
340 * Revision 1.137 2007/06/01 18:16:36 fabiankeil
341 * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
342 * deadlocks and crashes on OpenBSD and possibly other OS with neither
343 * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
344 * Thanks to Ralf Horstmann for report and solution.
346 * Revision 1.136 2007/06/01 16:41:11 fabiankeil
347 * Add forward-override{} to change the forwarding settings through
348 * action sections. This is mainly interesting to forward different
349 * clients differently (for example based on User-Agent or request
352 * Revision 1.135 2007/05/24 17:03:50 fabiankeil
353 * - Let usage() mention the --chroot parameter.
354 * - Use read_socket() consistently and always leave
355 * the last buffer byte alone, even in cases where
356 * null termination (currently) doesn't matter.
358 * Revision 1.134 2007/05/16 14:59:46 fabiankeil
359 * - Fix config file loading on Unix if no config file is specified.
360 * Since r1.97 Privoxy would always interpret the last argument as
361 * config file, even if it's a valid command line option.
362 * - Abort in case of unrecognized command line options. Closes #1719696.
363 * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
364 * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
366 * Revision 1.133 2007/05/04 11:23:19 fabiankeil
367 * - Don't rerun crunchers that only depend on the request URL.
368 * - Don't count redirects and CGI requests as "blocked requests".
370 * Revision 1.132 2007/04/25 15:15:17 fabiankeil
371 * Support crunching based on tags created by server-header taggers.
373 * Revision 1.131 2007/04/22 13:24:50 fabiankeil
374 * Make HTTP snippets static (again). Add a Content-Type for those
375 * with content so the browser doesn't guess it based on the URL.
377 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
378 * Move crunching and request line rebuilding out of chat().
380 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
381 * Introduce tags as alternative way to specify which
382 * actions apply to a request. At the moment tags can be
383 * created based on client and server headers.
385 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
386 * Don't CLF-log CONNECT requests twice.
388 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
389 * Log the source address for ACL-related connection drops.
391 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
392 * New config option: enforce-blocks.
394 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
395 * - Move null byte check into separate function.
396 * - Don't confuse the client with error pages
397 * if a CONNECT request was already confirmed.
399 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
400 * Speed up NULL byte escaping and only log the complete
401 * NULL byte requests with header debugging enabled.
403 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
404 * Answer requests that contain NULL bytes with
405 * a custom response instead of waiting for more
406 * data until the client eventually hangs up.
408 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
409 * - Move delivery and logging of crunched responses
410 * from chat() into send_crunch_response().
411 * - Display the reason for generating http_responses.
412 * - Log the content length for LOG_LEVEL_CLF correctly
413 * (still incorrect for some fixed responses).
414 * - Reword an incorrect comment about
415 * treat-forbidden-connects-like-blocks violating
417 * - Add some log messages.
419 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
420 * Move mutex initialization into separate
421 * function and exit in case of errors.
423 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
424 * - Start to reduce chat()'s line count and move
425 * parts of it into separate functions.
426 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
428 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
429 * - Add Proxy-Agent header to HTTP snippets that are
430 * supposed to reach HTTP clients only.
431 * - Made a few CONNECT log messages more descriptive.
432 * - Catch completely empty server responses (as seen
433 * with Tor's fake ".noconnect" top level domain).
434 * - Use shiny new "forwarding-failed" template for socks errors.
436 * Revision 1.118 2007/01/07 07:43:43 joergs
437 * AmigaOS4 support added.
439 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
440 * Added config option accept-intercepted-requests
441 * and disabled it by default.
443 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
444 * Reverted parts of my last commit
445 * to keep error handling working.
447 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
448 * Fixed gcc43 conversion warnings.
450 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
451 * Fix -pedantic ISO C warning about converting
452 * from function pointer to object pointer.
454 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
455 * Silence compiler warning I introduced with my last commit.
457 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
458 * Mutex protect rand() if POSIX threading
459 * is used, warn the user if that's not possible
460 * and stop using it on _WIN32 where it could
463 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
464 * Don't prevent core dumps by catching SIGABRT.
465 * It's rude and makes debugging unreasonable painful.
467 * Revision 1.110 2006/12/13 14:52:53 etresoft
468 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
470 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
471 * Privoxy is now able to run as intercepting
472 * proxy in combination with any packet filter
473 * that does the port redirection. The destination
474 * is extracted from the "Host:" header which
475 * should be available for nearly all requests.
477 * Moved HTTP snipplets into jcc.c.
478 * Added error message for gopher proxy requests.
480 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
481 * Only unlink the pidfile if it's actually used.
483 * Change order of interception checks to make
484 * it possible to block or redirect requests for
487 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
488 * Make pthread mutex locking more generic. Instead of
489 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
490 * and use mutex locking unless there is an _r function
491 * available. Better safe than sorry.
493 * Fixes "./configure --disable-pthread" and should result
494 * in less threading-related problems on pthread-using platforms,
495 * but it still doesn't fix BR#1122404.
497 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
498 * Move pthread.h inclusion from jcc.c to jcc.h.
499 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
501 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
502 * Don't exit after receiving the second SIGHUP on Solaris.
504 * Fixes BR 1052235, but the same problem may exist on other
505 * systems. Once 3.0.6 is out we should use sigset()
506 * where available and see if it breaks anything.
508 * Revision 1.104 2006/09/23 13:26:38 roro
509 * Replace TABs by spaces in source code.
511 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
512 * Fix +redirect{}. Didn't work with -fast-redirects.
514 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
515 * Respond with 400 and a short text message
516 * if the client tries to use Privoxy as FTP proxy.
518 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
519 * Make number of retries in case of forwarded-connect problems
520 * a config file option (forwarded-connect-retries) and use 0 as
523 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
524 * Set random(3) seed.
526 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
527 * Follow the OpenBSD port's lead and protect the resolve
528 * functions on OpenBSD as well.
530 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
531 * --user fix. Only use the user as group if no group is specified.
532 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
534 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
535 * Windows service (re-)integration
539 * --install[:service_name]
540 * --uninstall[:service_name]
543 * They work as follows:
544 * --install will create a service for you and then terminate.
545 * By default the service name will be "privoxy" (without the quotes).
546 * However you can run multiple services if you wish, just by adding
547 * a colon and then a name (no spaces).
549 * --uninstall follows the exact same rules a --install.
551 * --service is used when the program is executed by the service
552 * control manager, and in normal circumstances would never be
553 * used as a command line argument.
555 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
556 * Windows service integration
558 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
559 * Incorporate Fabian Keil's patch work:
560 http://www.fabiankeil.de/sourcecode/privoxy/
562 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
563 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
564 * with what was really the latest development (the v_3_0_branch branch)
566 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
567 * Thanks to Jindrich Makovicka for a race condition fix for the log
568 * file. The race condition remains for non-pthread implementations.
569 * Reference patch #1175720.
571 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
572 * Add the ability to check jpeg images for invalid
573 * lengths of comment blocks. Defensive strategy
574 * against the exploit:
575 * Microsoft Security Bulletin MS04-028
576 * Buffer Overrun in JPEG Processing (GDI+) Could
577 * Allow Code Execution (833987)
578 * Enabled with +inspect-jpegs in actions files.
580 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
581 * - Fixed usage info for non-unix platforms
582 * - Fixed small cmdline parsing bug
584 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
585 * Diagnostics: Now preserve the returncode of pthread_create
586 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
588 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
589 * No longer ignore SIGCHLD. Fixes bug #769381
591 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
592 * Close jarfile on graceful exit, remove stray line
594 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
595 * Cosmetics: Killed a warning, a typo and an allocation left at exit
597 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
598 * No longer rely on non-POSIX.1 extensions of getcwd().
601 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
602 * Replaced setenv() by posix-compliant putenv()
603 * Thanks to Neil McCalden (nmcc AT users.sf.net).
605 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
606 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
608 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
609 * Clean-up and extension of improvements for forked mode:
610 * - Child's return code now consists of flags RC_FLAG_*
611 * - Reporting toggle to parent now properly #ifdef'ed
612 * - Children now report blocking to parent. This enables
613 * statistics in forked mode
615 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
616 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
617 * Children now report having been toggled through _exit(17), parents
618 * watch for that code and toggle themselves if found.
620 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
621 * Wrapping all *_r functions (the non-_r versions of them) with
622 * mutex semaphores for OSX. Hopefully this will take care of all
623 * of those pesky crash reports.
625 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
626 * Fixed two mostly harmless mem leaks
628 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
629 * Fix: Head of global clients list now initialized to NULL
631 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
632 * Added basic support for OPTIONS and TRACE HTTP methods:
633 * - New interceptor direct_response() added in chat().
634 * - sed() moved to earlier in the process, so that the
635 * Host: header is evaluated before actions and forwarding
638 * Revision 1.92 2002/05/08 16:00:46 oes
639 * Chat's buffer handling:
640 * - Fixed bug with unchecked out-of-mem conditions
641 * while reading client request & server headers
642 * - No longer predict if the buffer limit will be exceeded
643 * in the next read -- check add_to_iob's new
644 * return code. If buffer couldn't be extended
645 * (policy or out-of-mem) while
646 * - reading from client: abort
647 * - reading server headers: send error page
648 * - buffering server body for filter: flush,
649 * and if that fails: send error page
651 * Revision 1.91 2002/04/08 20:35:58 swa
654 * Revision 1.90 2002/04/02 14:57:28 oes
655 * Made sending wafers independent of FEATURE_COOKIE_JAR
657 * Revision 1.89 2002/03/31 17:18:59 jongfoster
658 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
660 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
661 * More compiler warning message maintenance
663 * Revision 1.87 2002/03/26 22:29:54 swa
664 * we have a new homepage!
666 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
667 * Workaround for closing the jarfile before load_config() comes around again
669 * Revision 1.85 2002/03/24 15:23:33 jongfoster
672 * Revision 1.84 2002/03/24 13:25:43 swa
673 * name change related issues
675 * Revision 1.83 2002/03/16 23:54:06 jongfoster
676 * Adding graceful termination feature, to help look for memory leaks.
677 * If you enable this (which, by design, has to be done by hand
678 * editing config.h) and then go to http://i.j.b/die, then the program
679 * will exit cleanly after the *next* request. It should free all the
680 * memory that was used.
682 * Revision 1.82 2002/03/13 00:27:05 jongfoster
685 * Revision 1.81 2002/03/12 01:42:50 oes
686 * Introduced modular filters
688 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
689 * OS/2 port maintenance:
690 * - Fixed EMX build - it had decayed a little
691 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
692 * substituted a memset for now.
694 * Revision 1.79 2002/03/09 20:03:52 jongfoster
695 * - Making various functions return int rather than size_t.
696 * (Undoing a recent change). Since size_t is unsigned on
697 * Windows, functions like read_socket that return -1 on
698 * error cannot return a size_t.
700 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
701 * crashes, and also frequently caused JB to jump to 100%
702 * CPU and stay there. (Because it thought it had just
703 * read ((unsigned)-1) == 4Gb of data...)
705 * - The signature of write_socket has changed, it now simply
706 * returns success=0/failure=nonzero.
708 * - Trying to get rid of a few warnings --with-debug on
709 * Windows, I've introduced a new type "jb_socket". This is
710 * used for the socket file descriptors. On Windows, this
711 * is SOCKET (a typedef for unsigned). Everywhere else, it's
712 * an int. The error value can't be -1 any more, so it's
713 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
714 * Windows it maps to the #define INVALID_SOCKET.)
716 * - The signature of bind_port has changed.
718 * Revision 1.78 2002/03/08 21:35:04 oes
719 * Added optional group supplement to --user option. Will now use default group of user if no group given
721 * Revision 1.77 2002/03/07 03:52:06 oes
722 * - Fixed compiler warnings etc
723 * - Improved handling of failed DNS lookups
725 * Revision 1.76 2002/03/06 22:54:35 jongfoster
726 * Automated function-comment nitpicking.
728 * Revision 1.75 2002/03/06 10:02:19 oes
729 * Fixed stupid bug when --user was not given
731 * Revision 1.74 2002/03/06 00:49:31 jongfoster
732 * Fixing warning on Windows
733 * Making #ifdefs that refer to the same variable consistently
734 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
736 * Revision 1.73 2002/03/05 23:57:30 hal9
737 * Stray character 's' on line 1618 was breaking build.
739 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
740 * - Re-enable OS/2 building after new parms were added
741 * - Fix false out of memory report when resolving CGI templates when no IP
742 * address is available of failed attempt (a la no such domain)
744 * Revision 1.71 2002/03/05 18:13:56 oes
745 * Added --user option
747 * Revision 1.70 2002/03/05 04:52:42 oes
748 * Deleted non-errlog debugging code
750 * Revision 1.69 2002/03/04 23:50:00 jongfoster
751 * Splitting off bind_port() call into bind_port_helper(), with
754 * Revision 1.68 2002/03/04 20:17:32 oes
757 * Revision 1.67 2002/03/04 18:18:57 oes
758 * - Removed _DEBUG mode
759 * - Cleand up cmdline parsing
760 * - Introduced --no-daemon, --pidfile options
761 * - Cleaned up signal handling:
762 * - Terminate cleanly on INT, TERM and ABRT
763 * - Schedule logfile for re-opening on HUP
764 * - Ignore CHLD and PIPE
765 * - Leave the rest with their default handlers
766 * - Uniform handler registration
767 * - Added usage() function
768 * - Played styleguide police
770 * Revision 1.66 2002/03/03 15:06:55 oes
771 * Re-enabled automatic config reloading
773 * Revision 1.65 2002/03/03 14:49:11 oes
774 * Fixed CLF logging: Now uses client's original HTTP request
776 * Revision 1.64 2002/03/03 09:18:03 joergs
777 * Made jumbjuster work on AmigaOS again.
779 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
780 * Clean up a little CRLF unpleasantness that suddenly appeared
782 * Revision 1.62 2002/02/20 23:17:23 jongfoster
783 * Detecting some out-of memory conditions and exiting with a log message.
785 * Revision 1.61 2002/01/17 21:01:52 jongfoster
786 * Moving all our URL and URL pattern parsing code to urlmatch.c.
788 * Revision 1.60 2001/12/30 14:07:32 steudten
789 * - Add signal handling (unix)
790 * - Add SIGHUP handler (unix)
791 * - Add creation of pidfile (unix)
792 * - Add action 'top' in rc file (RH)
793 * - Add entry 'SIGNALS' to manpage
794 * - Add exit message to logfile (unix)
796 * Revision 1.59 2001/12/13 14:07:18 oes
797 * Fixed Bug: 503 error page now sent OK
799 * Revision 1.58 2001/11/30 23:37:24 jongfoster
800 * Renaming the Win32 config file to config.txt - this is almost the
801 * same as the corresponding UNIX name "config"
803 * Revision 1.57 2001/11/16 00:47:43 jongfoster
804 * Changing the tty-disconnection code to use setsid().
806 * Revision 1.56 2001/11/13 20:20:54 jongfoster
807 * Tabs->spaces, fixing a bug with missing {} around an if()
809 * Revision 1.55 2001/11/13 20:14:53 jongfoster
810 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
812 * Revision 1.54 2001/11/07 00:03:14 steudten
813 * Give reliable return value if an error
814 * occurs not just 0 with new daemon mode.
816 * Revision 1.53 2001/11/05 21:41:43 steudten
817 * Add changes to be a real daemon just for unix os.
818 * (change cwd to /, detach from controlling tty, set
819 * process group and session leader to the own process.
821 * Add some fatal-error log message for failed malloc().
822 * Add '-d' if compiled with 'configure --with-debug' to
823 * enable debug output.
825 * Revision 1.52 2001/10/26 20:11:20 jongfoster
826 * Fixing type mismatch
828 * Revision 1.51 2001/10/26 17:38:28 oes
831 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
832 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
833 * threads to call select() simultaneously. So, it's time to do a real, live,
834 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
835 * (native). Both versions will work, but using __OS2__ offers multi-threading.
837 * Revision 1.49 2001/10/23 21:41:35 jongfoster
838 * Added call to initialize the (statically-allocated of course)
839 * "out of memory" CGI response.
841 * Revision 1.48 2001/10/10 19:56:46 jongfoster
842 * Moving some code that wasn't cookie-related out of an #ifdef
845 * Revision 1.47 2001/10/10 16:44:36 oes
846 * Added CONNECT destination port limitation check
848 * Revision 1.46 2001/10/08 15:17:41 oes
849 * Re-enabled SSL forwarding
851 * Revision 1.45 2001/10/07 15:42:11 oes
852 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
854 * Moved downgrading of the HTTP version from parse_http_request to
855 * chat(), since we can't decide if it is necessary before we have
856 * determined the actions for the URL. The HTTP command is now
857 * *always* re-built so the repairs need no longer be special-cased.
859 * filter_popups now gets a csp pointer so it can raise the new
860 * CSP_FLAG_MODIFIED flag.
864 * Added configurable size limit for the IOB. If the IOB grows so
865 * large that the next read would exceed the limit, the header
866 * is generated, and the header & unfiltered buffer are flushed
867 * to the client. Chat then continues in non-buffering,
868 * non-filtering body mode.
870 * Revision 1.44 2001/10/02 18:13:57 oes
873 * Revision 1.43 2001/10/02 15:32:13 oes
874 * Moved generation of hdr
876 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
877 * Cleaning up 2 compiler warnings on OS/2.
879 * Revision 1.41 2001/09/16 17:05:14 jongfoster
880 * Removing unused #include showarg.h
882 * Revision 1.40 2001/09/16 15:41:45 jongfoster
883 * Fixing signed/unsigned comparison warning.
885 * Revision 1.39 2001/09/16 13:21:27 jongfoster
886 * Changes to use new list functions.
888 * Revision 1.38 2001/09/16 13:01:46 jongfoster
889 * Removing redundant function call that zeroed zalloc()'d memory.
891 * Revision 1.37 2001/09/10 11:12:24 oes
892 * Deleted unused variable
894 * Revision 1.36 2001/09/10 10:56:15 oes
895 * Silenced compiler warnings
897 * Revision 1.35 2001/07/31 14:44:22 oes
898 * Deleted unused size parameter from filter_popups()
900 * Revision 1.34 2001/07/30 22:08:36 jongfoster
901 * Tidying up #defines:
902 * - All feature #defines are now of the form FEATURE_xxx
903 * - Permanently turned off WIN_GUI_EDIT
904 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
906 * Revision 1.33 2001/07/29 19:32:00 jongfoster
907 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
909 * Revision 1.32 2001/07/29 18:47:05 jongfoster
910 * Adding missing #include "loadcfg.h"
912 * Revision 1.31 2001/07/29 12:17:48 oes
913 * Applied pthread fix by Paul Lieverse
915 * Revision 1.30 2001/07/25 22:57:13 jongfoster
916 * __BEOS__ no longer overrides FEATURE_PTHREAD.
917 * This is because FEATURE_PTHREAD will soon be widely used, so I
918 * want to keep it simple.
920 * Revision 1.29 2001/07/24 12:47:06 oes
921 * Applied BeOS support update by Eugenia
923 * Revision 1.28 2001/07/23 13:26:12 oes
924 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
926 * Revision 1.27 2001/07/19 19:09:47 haroon
927 * - Added code to take care of the situation where while processing the first
928 * server response (which includes the server header), after finding the end
929 * of the headers we were not looking past the end of the headers for
930 * content modification. I enabled it for filter_popups.
931 * Someone else should look to see if other similar operations should be
932 * done to the discarded portion of the buffer.
934 * Note 2001/07/20: No, the other content modification mechanisms will process
935 * the whole iob later anyway. --oes
937 * Revision 1.26 2001/07/18 12:31:36 oes
940 * Revision 1.25 2001/07/15 19:43:49 jongfoster
941 * Supports POSIX threads.
942 * Also removed some unused #includes.
944 * Revision 1.24 2001/07/13 14:00:40 oes
945 * - Generic content modification scheme:
946 * Each feature has its own applicability flag that is set
947 * from csp->action->flags.
948 * Replaced the "filtering" int flag , by a function pointer
949 * "content_filter" to the function that will do the content
950 * modification. If it is != NULL, the document will be buffered
951 * and processed through *content_filter, which must set
952 * csp->content_length and return a modified copy of the body
953 * or return NULL (on failiure).
954 * - Changed csp->is_text to the more generic bitmap csp->content_type
955 * which can currently take the valued CT_TEXT or CT_GIF
957 * - Removed all #ifdef PCRS
959 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
960 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
961 * the `block_acl' call. This prevents a compilation error when the user
962 * does not wish to use the "ACL" feature.
964 * Revision 1.22 2001/06/29 21:45:41 oes
965 * Indentation, CRLF->LF, Tab-> Space
967 * Revision 1.21 2001/06/29 13:29:36 oes
968 * - Cleaned up, improved comments
969 * - Unified all possible interceptors (CGI,
970 * block, trust, fast_redirect) in one
971 * place, with one (CGI) answer generation
972 * mechansim. Much clearer now.
973 * - Removed the GIF image generation, which
974 * is now done in filters.c:block_url()
975 * - Made error conditions like domain lookup
976 * failiure or (various) problems while talking
977 * to the server use cgi.c:error_response()
978 * instead of generating HTML/HTTP in chat() (yuck!)
979 * - Removed logentry from cancelled commit
981 * Revision 1.20 2001/06/09 10:55:28 jongfoster
982 * Changing BUFSIZ ==> BUFFER_SIZE
984 * Revision 1.19 2001/06/07 23:12:52 jongfoster
985 * Replacing function pointer in struct gateway with a directly
986 * called function forwarded_connect().
987 * Replacing struct gateway with struct forward_spec
989 * Revision 1.18 2001/06/03 19:12:16 oes
990 * introduced new cgi handling
992 * Revision 1.17 2001/06/01 20:07:23 jongfoster
993 * Now uses action +image-blocker{} rather than config->tinygif
995 * Revision 1.16 2001/06/01 18:49:17 jongfoster
996 * Replaced "list_share" with "list" - the tiny memory gain was not
997 * worth the extra complexity.
999 * Revision 1.15 2001/05/31 21:24:47 jongfoster
1000 * Changed "permission" to "action" throughout.
1001 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
1002 * Moved vanilla wafer check into chat(), since we must now
1003 * decide whether or not to add it based on the URL.
1005 * Revision 1.14 2001/05/29 20:14:01 joergs
1006 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
1009 * Revision 1.13 2001/05/29 09:50:24 jongfoster
1010 * Unified blocklist/imagelist/permissionslist.
1011 * File format is still under discussion, but the internal changes
1012 * are (mostly) done.
1014 * Also modified interceptor behaviour:
1015 * - We now intercept all URLs beginning with one of the following
1016 * prefixes (and *only* these prefixes):
1018 * * http://ijbswa.sf.net/config/
1019 * * http://ijbswa.sourceforge.net/config/
1020 * - New interceptors "home page" - go to http://i.j.b/ to see it.
1021 * - Internal changes so that intercepted and fast redirect pages
1022 * are not replaced with an image.
1023 * - Interceptors now have the option to send a binary page direct
1024 * to the client. (i.e. ijb-send-banner uses this)
1025 * - Implemented show-url-info interceptor. (Which is why I needed
1026 * the above interceptors changes - a typical URL is
1027 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
1028 * The previous mechanism would not have intercepted that, and
1029 * if it had been intercepted then it then it would have replaced
1030 * it with an image.)
1032 * Revision 1.12 2001/05/27 22:17:04 oes
1034 * - re_process_buffer no longer writes the modified buffer
1035 * to the client, which was very ugly. It now returns the
1036 * buffer, which it is then written by chat.
1038 * - content_length now adjusts the Content-Length: header
1039 * for modified documents rather than crunch()ing it.
1040 * (Length info in csp->content_length, which is 0 for
1041 * unmodified documents)
1043 * - For this to work, sed() is called twice when filtering.
1045 * Revision 1.11 2001/05/26 17:27:53 jongfoster
1046 * Added support for CLF and fixed LOG_LEVEL_LOG.
1047 * Also did CRLF->LF fix of my previous patch.
1049 * Revision 1.10 2001/05/26 15:26:15 jongfoster
1050 * ACL feature now provides more security by immediately dropping
1051 * connections from untrusted hosts.
1053 * Revision 1.9 2001/05/26 00:28:36 jongfoster
1054 * Automatic reloading of config file.
1055 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
1056 * Most of the global variables have been moved to a new
1057 * struct configuration_spec, accessed through csp->config->globalname
1058 * Most of the globals remaining are used by the Win32 GUI.
1060 * Revision 1.8 2001/05/25 22:43:18 jongfoster
1061 * Fixing minor memory leak and buffer overflow.
1063 * Revision 1.7 2001/05/25 22:34:30 jongfoster
1066 * Revision 1.6 2001/05/23 00:13:58 joergs
1067 * AmigaOS support fixed.
1069 * Revision 1.5 2001/05/22 18:46:04 oes
1071 * - Enabled filtering banners by size rather than URL
1072 * by adding patterns that replace all standard banner
1073 * sizes with the "Junkbuster" gif to the re_filterfile
1075 * - Enabled filtering WebBugs by providing a pattern
1076 * which kills all 1x1 images
1078 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
1079 * which is selected by the (nonstandard and therefore
1080 * capital) letter 'U' in the option string.
1081 * It causes the quantifiers to be ungreedy by default.
1082 * Appending a ? turns back to greedy (!).
1084 * - Added a new interceptor ijb-send-banner, which
1085 * sends back the "Junkbuster" gif. Without imagelist or
1086 * MSIE detection support, or if tinygif = 1, or the
1087 * URL isn't recognized as an imageurl, a lame HTML
1088 * explanation is sent instead.
1090 * - Added new feature, which permits blocking remote
1091 * script redirects and firing back a local redirect
1093 * The feature is conditionally compiled, i.e. it
1094 * can be disabled with --disable-fast-redirects,
1095 * plus it must be activated by a "fast-redirects"
1096 * line in the config file, has its own log level
1097 * and of course wants to be displayed by show-proxy-args
1098 * Note: Boy, all the #ifdefs in 1001 locations and
1099 * all the fumbling with configure.in and acconfig.h
1100 * were *way* more work than the feature itself :-(
1102 * - Because a generic redirect template was needed for
1103 * this, tinygif = 3 now uses the same.
1105 * - Moved GIFs, and other static HTTP response templates
1108 * - Some minor fixes
1110 * - Removed some >400 CRs again (Jon, you really worked
1113 * Revision 1.4 2001/05/21 19:34:01 jongfoster
1114 * Made failure to bind() a fatal error.
1116 * Revision 1.3 2001/05/20 01:21:20 jongfoster
1117 * Version 2.9.4 checkin.
1118 * - Merged popupfile and cookiefile, and added control over PCRS
1119 * filtering, in new "permissionsfile".
1120 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
1121 * file error you now get a message box (in the Win32 GUI) rather
1122 * than the program exiting with no explanation.
1123 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
1125 * - Removed tabs from "config"
1126 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
1127 * - Bumped up version number.
1129 * Revision 1.2 2001/05/17 22:34:44 oes
1130 * - Added hint on GIF char array generation to jcc.c
1131 * - Cleaned CRLF's from the sources and related files
1132 * - Repaired logging for REF and FRC
1134 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
1135 * Initial import of version 2.9.3 source tree
1138 *********************************************************************/
1144 #include <sys/types.h>
1153 # ifndef FEATURE_PTHREAD
1157 # include <windows.h>
1158 # include <process.h>
1159 # endif /* ndef FEATURE_PTHREAD */
1162 # ifndef _WIN_CONSOLE
1163 # include "w32log.h"
1164 # endif /* ndef _WIN_CONSOLE */
1165 # include "w32svrapi.h"
1167 #else /* ifndef _WIN32 */
1169 # if !defined (__OS2__)
1170 # include <unistd.h>
1171 # include <sys/wait.h>
1172 # endif /* ndef __OS2__ */
1173 # include <sys/time.h>
1174 # include <sys/stat.h>
1175 # include <sys/ioctl.h>
1178 #include <sys/termios.h>
1186 # include <signal.h>
1189 # include <socket.h> /* BeOS has select() for sockets only. */
1190 # include <OS.h> /* declarations for threads and stuff. */
1193 # if defined(__EMX__) || defined(__OS2__)
1194 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
1199 #define bzero(B,N) memset(B,0x00,n)
1203 # include <select.h>
1208 #include "project.h"
1211 #include "filters.h"
1212 #include "loaders.h"
1213 #include "parsers.h"
1214 #include "miscutil.h"
1216 #include "jbsockets.h"
1217 #include "gateway.h"
1218 #include "actions.h"
1220 #include "loadcfg.h"
1221 #include "urlmatch.h"
1223 const char jcc_h_rcs[] = JCC_H_VERSION;
1224 const char project_h_rcs[] = PROJECT_H_VERSION;
1227 struct client_state clients[1];
1228 struct file_list files[1];
1230 #ifdef FEATURE_STATISTICS
1231 int urls_read = 0; /* total nr of urls read inc rejected */
1232 int urls_rejected = 0; /* total nr of urls rejected */
1233 #endif /* def FEATURE_STATISTICS */
1235 #ifdef FEATURE_GRACEFUL_TERMINATION
1236 int g_terminate = 0;
1239 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1240 static void sig_handler(int the_signal);
1242 static int client_protocol_is_unsupported(const struct client_state *csp, char *req);
1243 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
1244 static jb_err get_server_headers(struct client_state *csp);
1245 static const char *crunch_reason(const struct http_response *rsp);
1246 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp);
1247 static char *get_request_line(struct client_state *csp);
1248 static jb_err receive_client_request(struct client_state *csp);
1249 static jb_err parse_client_request(struct client_state *csp);
1250 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
1251 static jb_err change_request_destination(struct client_state *csp);
1252 static void chat(struct client_state *csp);
1253 static void serve(struct client_state *csp);
1254 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1255 static void usage(const char *myname);
1257 static void initialize_mutexes(void);
1258 static jb_socket bind_port_helper(struct configuration_spec *config);
1259 static void listen_loop(void);
1262 void serve(struct client_state *csp);
1263 #else /* ifndef AMIGA */
1264 static void serve(struct client_state *csp);
1265 #endif /* def AMIGA */
1268 static int32 server_thread(void *data);
1269 #endif /* def __BEOS__ */
1272 #define sleep(N) Sleep(((N) * 1000))
1276 #define sleep(N) DosSleep(((N) * 100))
1279 #ifdef MUTEX_LOCKS_AVAILABLE
1281 * XXX: Does the locking stuff really belong in this file?
1283 privoxy_mutex_t log_mutex;
1284 privoxy_mutex_t log_init_mutex;
1285 privoxy_mutex_t connection_reuse_mutex;
1287 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
1288 privoxy_mutex_t resolver_mutex;
1289 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
1291 #ifndef HAVE_GMTIME_R
1292 privoxy_mutex_t gmtime_mutex;
1293 #endif /* ndef HAVE_GMTIME_R */
1295 #ifndef HAVE_LOCALTIME_R
1296 privoxy_mutex_t localtime_mutex;
1297 #endif /* ndef HAVE_GMTIME_R */
1300 privoxy_mutex_t rand_mutex;
1301 #endif /* ndef HAVE_RANDOM */
1303 #endif /* def MUTEX_LOCKS_AVAILABLE */
1306 const char *basedir = NULL;
1307 const char *pidfile = NULL;
1308 static int received_hup_signal = 0;
1309 #endif /* defined unix */
1311 /* HTTP snipplets. */
1312 static const char CSUCCEED[] =
1313 "HTTP/1.0 200 Connection established\r\n"
1314 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
1316 static const char CHEADER[] =
1317 "HTTP/1.0 400 Invalid header received from client\r\n"
1318 "Proxy-Agent: Privoxy " VERSION "\r\n"
1319 "Content-Type: text/plain\r\n"
1320 "Connection: close\r\n\r\n"
1321 "Invalid header received from client.\r\n";
1323 static const char FTP_RESPONSE[] =
1324 "HTTP/1.0 400 Invalid request received from client\r\n"
1325 "Content-Type: text/plain\r\n"
1326 "Connection: close\r\n\r\n"
1327 "Invalid request. Privoxy doesn't support FTP.\r\n";
1329 static const char GOPHER_RESPONSE[] =
1330 "HTTP/1.0 400 Invalid request received from client\r\n"
1331 "Content-Type: text/plain\r\n"
1332 "Connection: close\r\n\r\n"
1333 "Invalid request. Privoxy doesn't support gopher.\r\n";
1335 /* XXX: should be a template */
1336 static const char MISSING_DESTINATION_RESPONSE[] =
1337 "HTTP/1.0 400 Bad request received from client\r\n"
1338 "Proxy-Agent: Privoxy " VERSION "\r\n"
1339 "Content-Type: text/plain\r\n"
1340 "Connection: close\r\n\r\n"
1341 "Bad request. Privoxy was unable to extract the destination.\r\n";
1343 /* XXX: should be a template */
1344 static const char NO_SERVER_DATA_RESPONSE[] =
1345 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1346 "Proxy-Agent: Privoxy " VERSION "\r\n"
1347 "Content-Type: text/plain\r\n"
1348 "Connection: close\r\n\r\n"
1349 "Empty server or forwarder response.\r\n"
1350 "The connection has been closed but Privoxy didn't receive any data.\r\n";
1352 /* XXX: should be a template */
1353 static const char INVALID_SERVER_HEADERS_RESPONSE[] =
1354 "HTTP/1.0 502 Server or forwarder response invalid\r\n"
1355 "Proxy-Agent: Privoxy " VERSION "\r\n"
1356 "Content-Type: text/plain\r\n"
1357 "Connection: close\r\n\r\n"
1358 "Bad response. The server or forwarder response doesn't look like HTTP.\r\n";
1361 /* XXX: should be a template */
1362 static const char NULL_BYTE_RESPONSE[] =
1363 "HTTP/1.0 400 Bad request received from client\r\n"
1364 "Proxy-Agent: Privoxy " VERSION "\r\n"
1365 "Content-Type: text/plain\r\n"
1366 "Connection: close\r\n\r\n"
1367 "Bad request. Null byte(s) before end of request.\r\n";
1370 /* XXX: should be a template */
1371 static const char MESSED_UP_REQUEST_RESPONSE[] =
1372 "HTTP/1.0 400 Malformed request after rewriting\r\n"
1373 "Proxy-Agent: Privoxy " VERSION "\r\n"
1374 "Content-Type: text/plain\r\n"
1375 "Connection: close\r\n\r\n"
1376 "Bad request. Messed up with header filters.\r\n";
1378 /* A function to crunch a response */
1379 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
1381 /* Crunch function flags */
1382 #define CF_NO_FLAGS 0
1383 /* Cruncher applies to forced requests as well */
1384 #define CF_IGNORE_FORCE 1
1385 /* Crunched requests are counted for the block statistics */
1386 #define CF_COUNT_AS_REJECT 2
1388 /* A crunch function and its flags */
1391 const crunch_func_ptr cruncher;
1395 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
1397 /* Complete list of cruncher functions */
1398 static const struct cruncher crunchers_all[] = {
1399 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
1400 { block_url, CF_COUNT_AS_REJECT },
1401 #ifdef FEATURE_TRUST
1402 { trust_url, CF_COUNT_AS_REJECT },
1403 #endif /* def FEATURE_TRUST */
1404 { redirect_url, CF_NO_FLAGS },
1405 { dispatch_cgi, CF_IGNORE_FORCE},
1409 /* Light version, used after tags are applied */
1410 static const struct cruncher crunchers_light[] = {
1411 { block_url, CF_COUNT_AS_REJECT },
1412 { redirect_url, CF_NO_FLAGS },
1418 * XXX: Don't we really mean
1424 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1425 /*********************************************************************
1427 * Function : sig_handler
1429 * Description : Signal handler for different signals.
1430 * Exit gracefully on TERM and INT
1431 * or set a flag that will cause the errlog
1432 * to be reopened by the main thread on HUP.
1435 * 1 : the_signal = the signal cause this function to call
1439 *********************************************************************/
1440 static void sig_handler(int the_signal)
1446 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1458 received_hup_signal = 1;
1464 * We shouldn't be here, unless we catch signals
1465 * in main() that we can't handle here!
1467 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1475 /*********************************************************************
1477 * Function : client_protocol_is_unsupported
1479 * Description : Checks if the client used a known unsupported
1480 * protocol and deals with it by sending an error
1484 * 1 : csp = Current client state (buffers, headers, etc...)
1485 * 2 : req = the first request line send by the client
1487 * Returns : TRUE if an error response has been generated, or
1488 * FALSE if the request doesn't look invalid.
1490 *********************************************************************/
1491 static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1494 * If it's a FTP or gopher request, we don't support it.
1496 * These checks are better than nothing, but they might
1497 * not work in all configurations and some clients might
1498 * have problems digesting the answer.
1500 * They should, however, never cause more problems than
1501 * Privoxy's old behaviour (returning the misleading HTML
1504 * "Could not resolve http://(ftp|gopher)://example.org").
1506 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1508 const char *response = NULL;
1509 const char *protocol = NULL;
1511 if (!strncmpic(req, "GET ftp://", 10))
1513 response = FTP_RESPONSE;
1518 response = GOPHER_RESPONSE;
1519 protocol = "GOPHER";
1521 log_error(LOG_LEVEL_ERROR,
1522 "%s tried to use Privoxy as %s proxy: %s",
1523 csp->ip_addr_str, protocol, req);
1524 log_error(LOG_LEVEL_CLF,
1525 "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1527 write_socket(csp->cfd, response, strlen(response));
1536 /*********************************************************************
1538 * Function : get_request_destination_elsewhere
1540 * Description : If the client's request was redirected into
1541 * Privoxy without the client's knowledge,
1542 * the request line lacks the destination host.
1544 * This function tries to get it elsewhere,
1545 * provided accept-intercepted-requests is enabled.
1547 * "Elsewhere" currently only means "Host: header",
1548 * but in the future we may ask the redirecting
1549 * packet filter to look the destination up.
1551 * If the destination stays unknown, an error
1552 * response is send to the client and headers
1553 * are freed so that chat() can return directly.
1556 * 1 : csp = Current client state (buffers, headers, etc...)
1557 * 2 : headers = a header list
1559 * Returns : JB_ERR_OK if the destination is now known, or
1560 * JB_ERR_PARSE if it isn't.
1562 *********************************************************************/
1563 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1567 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1569 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1570 " Privoxy isn't configured to accept intercepted requests.",
1571 csp->ip_addr_str, csp->http->cmd);
1572 /* XXX: Use correct size */
1573 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1574 csp->ip_addr_str, csp->http->cmd);
1576 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1577 destroy_list(headers);
1579 return JB_ERR_PARSE;
1581 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1583 /* Split the domain we just got for pattern matching */
1584 init_domain_components(csp->http);
1590 /* We can't work without destination. Go spread the news.*/
1592 req = list_to_text(headers);
1594 /* XXX: Use correct size */
1595 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1596 csp->ip_addr_str, csp->http->cmd);
1597 log_error(LOG_LEVEL_ERROR,
1598 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1599 csp->ip_addr_str, csp->http->cmd, req);
1602 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
1603 destroy_list(headers);
1605 return JB_ERR_PARSE;
1608 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1609 * to get the destination IP address, use it as host directly
1610 * or do a reverse DNS lookup first.
1615 /*********************************************************************
1617 * Function : get_server_headers
1619 * Description : Parses server headers in iob and fills them
1620 * into csp->headers so that they can later be
1624 * 1 : csp = Current client state (buffers, headers, etc...)
1626 * Returns : JB_ERR_OK if everything went fine, or
1627 * JB_ERR_PARSE if the headers were incomplete.
1629 *********************************************************************/
1630 static jb_err get_server_headers(struct client_state *csp)
1632 int continue_hack_in_da_house = 0;
1635 while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
1640 * continue hack in da house. Ignore the ending of
1641 * this head and continue enlisting header lines.
1642 * The reason is described below.
1644 enlist(csp->headers, "");
1645 continue_hack_in_da_house = 0;
1648 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1651 * It's a bodyless continue response, don't
1652 * stop header parsing after reaching its end.
1654 * As a result Privoxy will concatenate the
1655 * next response's head and parse and deliver
1656 * the headers as if they belonged to one request.
1658 * The client will separate them because of the
1659 * empty line between them.
1661 * XXX: What we're doing here is clearly against
1662 * the intended purpose of the continue header,
1663 * and under some conditions (HTTP/1.0 client request)
1664 * it's a standard violation.
1666 * Anyway, "sort of against the spec" is preferable
1667 * to "always getting confused by Continue responses"
1668 * (Privoxy's behaviour before this hack was added)
1670 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1671 continue_hack_in_da_house = 1;
1673 else if (*header == '\0')
1676 * If the header is empty, but the Continue hack
1677 * isn't active, we can assume that we reached the
1678 * end of the buffer before we hit the end of the
1681 * Inform the caller an let it decide how to handle it.
1683 return JB_ERR_PARSE;
1686 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1689 * XXX: Should we quit the request and return a
1690 * out of memory error page instead?
1692 log_error(LOG_LEVEL_ERROR,
1693 "Out of memory while enlisting server headers. %s lost.",
1703 /*********************************************************************
1705 * Function : crunch_reason
1707 * Description : Translates the crunch reason code into a string.
1710 * 1 : rsp = a http_response
1712 * Returns : A string with the crunch reason or an error description.
1714 *********************************************************************/
1715 static const char *crunch_reason(const struct http_response *rsp)
1717 char * reason = NULL;
1719 assert(rsp != NULL);
1722 return "Internal error while searching for crunch reason";
1725 switch (rsp->reason)
1727 case RSP_REASON_UNSUPPORTED:
1728 reason = "Unsupported HTTP feature";
1730 case RSP_REASON_BLOCKED:
1733 case RSP_REASON_UNTRUSTED:
1734 reason = "Untrusted";
1736 case RSP_REASON_REDIRECTED:
1737 reason = "Redirected";
1739 case RSP_REASON_CGI_CALL:
1740 reason = "CGI Call";
1742 case RSP_REASON_NO_SUCH_DOMAIN:
1743 reason = "DNS failure";
1745 case RSP_REASON_FORWARDING_FAILED:
1746 reason = "Forwarding failed";
1748 case RSP_REASON_CONNECT_FAILED:
1749 reason = "Connection failure";
1751 case RSP_REASON_OUT_OF_MEMORY:
1752 reason = "Out of memory (may mask other reasons)";
1755 reason = "No reason recorded";
1763 /*********************************************************************
1765 * Function : send_crunch_response
1767 * Description : Delivers already prepared response for
1768 * intercepted requests, logs the interception
1769 * and frees the response.
1772 * 1 : csp = Current client state (buffers, headers, etc...)
1773 * 1 : rsp = Fully prepared response. Will be freed on exit.
1775 * Returns : Nothing.
1777 *********************************************************************/
1778 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp)
1780 const struct http_request *http = csp->http;
1781 char status_code[4];
1783 assert(rsp != NULL);
1784 assert(rsp->head != NULL);
1789 * Not supposed to happen. If it does
1790 * anyway, treat it as an unknown error.
1792 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1793 /* return code doesn't matter */
1798 /* If rsp is still NULL, we have serious internal problems. */
1799 log_error(LOG_LEVEL_FATAL,
1800 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1804 * Extract the status code from the actual head
1805 * that was send to the client. It is the only
1806 * way to get it right for all requests, including
1807 * the fixed ones for out-of-memory problems.
1809 * A head starts like this: 'HTTP/1.1 200...'
1813 status_code[0] = rsp->head[9];
1814 status_code[1] = rsp->head[10];
1815 status_code[2] = rsp->head[11];
1816 status_code[3] = '\0';
1818 /* Write the answer to the client */
1819 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1820 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1822 /* There is nothing we can do about it. */
1823 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1826 /* Log that the request was crunched and why. */
1827 log_error(LOG_LEVEL_CRUNCH, "%s: %s", crunch_reason(rsp), http->url);
1828 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %d",
1829 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1831 /* Clean up and return */
1832 if (cgi_error_memory() != rsp)
1834 free_http_response(rsp);
1841 /*********************************************************************
1843 * Function : request_contains_null_bytes
1845 * Description : Checks for NULL bytes in the request and sends
1846 * an error message to the client if any were found.
1848 * XXX: currently not used, see comment in chat().
1851 * 1 : csp = Current client state (buffers, headers, etc...)
1852 * 2 : buf = Data from the client's request to check.
1853 * 3 : len = The data length.
1855 * Returns : TRUE if the request contained one or more NULL bytes, or
1858 *********************************************************************/
1859 static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1861 size_t c_len; /* Request lenght when treated as C string */
1863 c_len = strlen(buf);
1868 * Null byte(s) found. Log the request,
1869 * return an error response and hang up.
1871 size_t tmp_len = c_len;
1876 * Replace NULL byte(s) with '°' characters
1877 * so the request can be logged as string.
1878 * XXX: Is there a better replacement character?
1881 tmp_len += strlen(buf+tmp_len);
1882 } while (tmp_len < len);
1884 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1885 "(length=%d, strlen=%d).", csp->ip_addr_str, len, c_len);
1886 log_error(LOG_LEVEL_HEADER,
1887 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1889 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
1891 /* XXX: Log correct size */
1892 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1902 /*********************************************************************
1904 * Function : crunch_response_triggered
1906 * Description : Checks if the request has to be crunched,
1907 * and delivers the crunch response if necessary.
1910 * 1 : csp = Current client state (buffers, headers, etc...)
1911 * 2 : crunchers = list of cruncher functions to run
1913 * Returns : TRUE if the request was answered with a crunch response
1916 *********************************************************************/
1917 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
1919 struct http_response *rsp = NULL;
1920 const struct cruncher *c;
1923 * If CGI request crunching is disabled,
1924 * check the CGI dispatcher out of order to
1925 * prevent unintentional blocks or redirects.
1927 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
1928 && (NULL != (rsp = dispatch_cgi(csp))))
1930 /* Deliver, log and free the interception response. */
1931 send_crunch_response(csp, rsp);
1935 for (c = crunchers; c->cruncher != NULL; c++)
1938 * Check the cruncher if either Privoxy is toggled
1939 * on and the request isn't forced, or if the cruncher
1940 * applies to forced requests as well.
1942 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
1943 !(csp->flags & CSP_FLAG_FORCED)) ||
1944 (c->flags & CF_IGNORE_FORCE))
1946 rsp = c->cruncher(csp);
1949 /* Deliver, log and free the interception response. */
1950 send_crunch_response(csp, rsp);
1951 #ifdef FEATURE_STATISTICS
1952 if (c->flags & CF_COUNT_AS_REJECT)
1954 csp->flags |= CSP_FLAG_REJECTED;
1956 #endif /* def FEATURE_STATISTICS */
1967 /*********************************************************************
1969 * Function : build_request_line
1971 * Description : Builds the HTTP request line.
1973 * If a HTTP forwarder is used it expects the whole URL,
1974 * web servers only get the path.
1977 * 1 : csp = Current client state (buffers, headers, etc...)
1978 * 2 : fwd = The forwarding spec used for the request
1979 * XXX: Should use http->fwd instead.
1980 * 3 : request_line = The old request line which will be replaced.
1982 * Returns : Nothing. Terminates in case of memory problems.
1984 *********************************************************************/
1985 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
1987 struct http_request *http = csp->http;
1989 assert(http->ssl == 0);
1992 * Downgrade http version from 1.1 to 1.0
1993 * if +downgrade action applies.
1995 if ( (csp->action->flags & ACTION_DOWNGRADE)
1996 && (!strcmpic(http->ver, "HTTP/1.1")))
1999 http->ver = strdup("HTTP/1.0");
2001 if (http->ver == NULL)
2003 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
2008 * Rebuild the request line.
2010 freez(*request_line);
2011 *request_line = strdup(http->gpc);
2012 string_append(request_line, " ");
2014 if (fwd->forward_host)
2016 string_append(request_line, http->url);
2020 string_append(request_line, http->path);
2022 string_append(request_line, " ");
2023 string_append(request_line, http->ver);
2025 if (*request_line == NULL)
2027 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
2029 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
2033 /*********************************************************************
2035 * Function : change_request_destination
2037 * Description : Parse a (rewritten) request line and regenerate
2038 * the http request data.
2041 * 1 : csp = Current client state (buffers, headers, etc...)
2043 * Returns : Forwards the parse_http_request() return code.
2044 * Terminates in case of memory problems.
2046 *********************************************************************/
2047 static jb_err change_request_destination(struct client_state *csp)
2049 struct http_request *http = csp->http;
2052 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
2053 free_http_request(http);
2054 err = parse_http_request(csp->headers->first->str, http, csp);
2055 if (JB_ERR_OK != err)
2057 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
2058 jb_err_to_string(err));
2062 /* XXX: ocmd is a misleading name */
2063 http->ocmd = strdup(http->cmd);
2064 if (http->ocmd == NULL)
2066 log_error(LOG_LEVEL_FATAL,
2067 "Out of memory copying rewritten HTTP request line");
2075 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2076 /*********************************************************************
2078 * Function : server_response_is_complete
2080 * Description : Determines whether we should stop reading
2081 * from the server socket.
2084 * 1 : csp = Current client state (buffers, headers, etc...)
2085 * 2 : content_length = Length of content received so far.
2087 * Returns : TRUE if the response is complete,
2090 *********************************************************************/
2091 static int server_response_is_complete(struct client_state *csp, size_t content_length)
2093 int content_length_known = (csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
2095 if (!strcmpic(csp->http->gpc, "HEAD"))
2098 * "HEAD" implies no body, we are thus expecting
2099 * no content. XXX: incomplete "list" of methods?
2101 csp->expected_content_length = 0;
2102 content_length_known = TRUE;
2105 if (csp->http->status == 304)
2108 * Expect no body. XXX: incomplete "list" of status codes?
2110 csp->expected_content_length = 0;
2111 content_length_known = TRUE;
2114 return (content_length_known && ((0 == csp->expected_content_length)
2115 || (csp->expected_content_length <= content_length)));
2117 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2119 /*********************************************************************
2121 * Function : mark_server_socket_tainted
2123 * Description : Makes sure we don't reuse a server socket
2124 * (if we didn't read everything the server sent
2125 * us reusing the socket would lead to garbage).
2128 * 1 : csp = Current client state (buffers, headers, etc...)
2132 *********************************************************************/
2133 static void mark_server_socket_tainted(struct client_state *csp)
2135 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
2137 log_error(LOG_LEVEL_CONNECT, "Unsetting keep-alive flag.");
2138 csp->flags &= ~CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE;
2142 /*********************************************************************
2144 * Function : get_request_line
2146 * Description : Read the client request line.
2149 * 1 : csp = Current client state (buffers, headers, etc...)
2151 * Returns : Pointer to request line or NULL in case of errors.
2153 *********************************************************************/
2154 static char *get_request_line(struct client_state *csp)
2156 char buf[BUFFER_SIZE];
2157 char *request_line = NULL;
2160 memset(buf, 0, sizeof(buf));
2164 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2166 if (len <= 0) return NULL;
2169 * If there is no memory left for buffering the
2170 * request, there is nothing we can do but hang up
2172 if (add_to_iob(csp, buf, len))
2177 request_line = get_header(csp->iob);
2179 } while ((NULL != request_line) && ('\0' == *request_line));
2181 return request_line;
2186 /*********************************************************************
2188 * Function : receive_client_request
2190 * Description : Read the client's request (more precisely the
2191 * client headers) and answer it if necessary.
2193 * Note that since we're not using select() we could get
2194 * blocked here if a client connected, then didn't say
2198 * 1 : csp = Current client state (buffers, headers, etc...)
2200 * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
2202 *********************************************************************/
2203 static jb_err receive_client_request(struct client_state *csp)
2205 char buf[BUFFER_SIZE];
2208 struct http_request *http;
2212 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
2213 struct list header_list;
2214 struct list *headers = &header_list;
2218 memset(buf, 0, sizeof(buf));
2220 req = get_request_line(csp);
2222 if ((NULL != req) && ('\0' != *req))
2224 /* Request received. Validate and parse it. */
2226 /* Does the request line look invalid? */
2227 if (client_protocol_is_unsupported(csp, req))
2230 * Yes. The request has already been
2231 * answered with a error response, the buffers
2232 * were freed and we're done with chatting.
2234 return JB_ERR_PARSE;
2237 #ifdef FEATURE_FORCE_LOAD
2239 * If this request contains the FORCE_PREFIX and blocks
2240 * aren't enforced, get rid of it and set the force flag.
2242 if (strstr(req, FORCE_PREFIX))
2244 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
2246 log_error(LOG_LEVEL_FORCE,
2247 "Ignored force prefix in request: \"%s\".", req);
2251 strclean(req, FORCE_PREFIX);
2252 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
2253 csp->flags |= CSP_FLAG_FORCED;
2256 #endif /* def FEATURE_FORCE_LOAD */
2258 err = parse_http_request(req, http, csp);
2259 if (JB_ERR_OK != err)
2261 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", jb_err_to_string(err));
2267 if (http->cmd == NULL)
2269 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
2270 /* XXX: Use correct size */
2271 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2272 log_error(LOG_LEVEL_ERROR, "Invalid header received from %s.", csp->ip_addr_str);
2274 free_http_request(http);
2275 return JB_ERR_PARSE;
2278 /* grab the rest of the client's headers */
2282 p = get_header(csp->iob);
2286 /* There are no additional headers to read. */
2293 * We didn't receive a complete header
2294 * line yet, get the rest of it.
2296 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2299 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
2300 destroy_list(headers);
2301 return JB_ERR_PARSE;
2304 if (add_to_iob(csp, buf, len))
2307 * If there is no memory left for buffering the
2308 * request, there is nothing we can do but hang up
2310 destroy_list(headers);
2311 return JB_ERR_MEMORY;
2317 * We were able to read a complete
2318 * header and can finaly enlist it.
2325 if (http->host == NULL)
2328 * If we still don't know the request destination,
2329 * the request is invalid or the client uses
2330 * Privoxy without its knowledge.
2332 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
2335 * Our attempts to get the request destination
2336 * elsewhere failed or Privoxy is configured
2337 * to only accept proxy requests.
2339 * An error response has already been send
2340 * and we're done here.
2342 return JB_ERR_PARSE;
2347 * Determine the actions for this URL
2349 #ifdef FEATURE_TOGGLE
2350 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
2352 /* Most compatible set of actions (i.e. none) */
2353 init_current_action(csp->action);
2356 #endif /* ndef FEATURE_TOGGLE */
2358 get_url_actions(csp, http);
2362 * Save a copy of the original request for logging
2364 http->ocmd = strdup(http->cmd);
2365 if (http->ocmd == NULL)
2367 log_error(LOG_LEVEL_FATAL,
2368 "Out of memory copying HTTP request line");
2370 enlist(csp->headers, http->cmd);
2372 /* Append the previously read headers */
2373 list_append_list_unique(csp->headers, headers);
2374 destroy_list(headers);
2381 /*********************************************************************
2383 * Function : parse_client_request
2385 * Description : Parses the client's request and decides what to do
2388 * Note that since we're not using select() we could get
2389 * blocked here if a client connected, then didn't say
2393 * 1 : csp = Current client state (buffers, headers, etc...)
2395 * Returns : JB_ERR_OK or JB_ERR_PARSE
2397 *********************************************************************/
2398 static jb_err parse_client_request(struct client_state *csp)
2400 struct http_request *http = csp->http;
2403 err = sed(csp, FILTER_CLIENT_HEADERS);
2404 if (JB_ERR_OK != err)
2406 /* XXX: Should be handled in sed(). */
2407 assert(err == JB_ERR_PARSE);
2408 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers.");
2410 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2412 /* Check request line for rewrites. */
2413 if ((NULL == csp->headers->first->str)
2414 || (strcmp(http->cmd, csp->headers->first->str) &&
2415 (JB_ERR_OK != change_request_destination(csp))))
2418 * A header filter broke the request line - bail out.
2420 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
2421 /* XXX: Use correct size */
2422 log_error(LOG_LEVEL_CLF,
2423 "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
2424 log_error(LOG_LEVEL_ERROR,
2425 "Invalid request line after applying header filters.");
2426 free_http_request(http);
2428 return JB_ERR_PARSE;
2436 /*********************************************************************
2440 * Description : Once a connection to the client has been accepted,
2441 * this function is called (via serve()) to handle the
2442 * main business of the communication. When this
2443 * function returns, the caller must close the client
2446 * FIXME: chat is nearly thousand lines long.
2450 * 1 : csp = Current client state (buffers, headers, etc...)
2452 * Returns : Nothing.
2454 *********************************************************************/
2455 static void chat(struct client_state *csp)
2457 char buf[BUFFER_SIZE];
2464 int ms_iis5_hack = 0;
2465 size_t byte_count = 0;
2466 int forwarded_connect_retries = 0;
2467 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
2468 const struct forward_spec *fwd;
2469 struct http_request *http;
2470 int len; /* for buffer sizes (and negative error codes) */
2472 /* Function that does the content filtering for the current request */
2473 filter_function_ptr content_filter = NULL;
2475 /* Skeleton for HTTP response, if we should intercept the request */
2476 struct http_response *rsp;
2478 memset(buf, 0, sizeof(buf));
2482 if (receive_client_request(csp) != JB_ERR_OK)
2486 if (parse_client_request(csp) != JB_ERR_OK)
2491 /* decide how to route the HTTP request */
2492 fwd = forward_url(csp, http);
2495 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
2496 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2500 * build the http request to send to the server
2501 * we have to do one of the following:
2503 * create = use the original HTTP request to create a new
2504 * HTTP request that has either the path component
2505 * without the http://domainspec (w/path) or the
2506 * full orininal URL (w/url)
2507 * Note that the path and/or the HTTP version may
2508 * have been altered by now.
2510 * connect = Open a socket to the host:port of the server
2511 * and short-circuit server and client socket.
2513 * pass = Pass the request unchanged if forwarding a CONNECT
2514 * request to a parent proxy. Note that we'll be sending
2515 * the CFAIL message ourselves if connecting to the parent
2516 * fails, but we won't send a CSUCCEED message if it works,
2517 * since that would result in a double message (ours and the
2518 * parent's). After sending the request to the parent, we simply
2521 * here's the matrix:
2524 * +--------+--------+
2526 * 0 | create | connect|
2528 * Forwarding +--------+--------+
2530 * 1 | create | pass |
2532 * +--------+--------+
2536 if (http->ssl && connect_port_is_forbidden(csp))
2538 const char *acceptable_connect_ports =
2539 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
2540 assert(NULL != acceptable_connect_ports);
2541 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
2542 "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
2543 csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
2544 csp->action->flags |= ACTION_BLOCK;
2550 freez(csp->headers->first->str);
2551 build_request_line(csp, fwd, &csp->headers->first->str);
2555 * We have a request. Check if one of the crunchers wants it.
2557 if (crunch_response_triggered(csp, crunchers_all))
2560 * Yes. The client got the crunch response
2561 * and we are done here after cleaning up.
2563 /* XXX: why list_remove_all()? */
2564 list_remove_all(csp->headers);
2569 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2571 if (fwd->forward_host)
2573 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2574 fwd->forward_host, fwd->forward_port, http->hostport);
2578 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2581 /* here we connect to the server, gateway, or the forwarder */
2583 while ((csp->sfd = forwarded_connect(fwd, http, csp))
2584 && (errno == EINVAL)
2585 && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2587 log_error(LOG_LEVEL_ERROR,
2588 "failed request #%u to connect to %s. Trying again.",
2589 forwarded_connect_retries, http->hostport);
2592 if (csp->sfd == JB_INVALID_SOCKET)
2594 if (fwd->type != SOCKS_NONE)
2597 rsp = error_response(csp, "forwarding-failed", errno);
2599 else if (errno == EINVAL)
2601 rsp = error_response(csp, "no-such-domain", errno);
2605 rsp = error_response(csp, "connect-failed", errno);
2606 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2610 /* Write the answer to the client */
2613 send_crunch_response(csp, rsp);
2619 hdr = list_to_text(csp->headers);
2622 /* FIXME Should handle error properly */
2623 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2625 list_remove_all(csp->headers);
2627 if (fwd->forward_host || (http->ssl == 0))
2630 * Write the client's (modified) header to the server
2631 * (along with anything else that may be in the buffer)
2633 if (write_socket(csp->sfd, hdr, strlen(hdr))
2634 || (flush_socket(csp->sfd, csp->iob) < 0))
2636 log_error(LOG_LEVEL_CONNECT,
2637 "write header to: %s failed: %E", http->hostport);
2639 rsp = error_response(csp, "connect-failed", errno);
2642 send_crunch_response(csp, rsp);
2652 * We're running an SSL tunnel and we're not forwarding,
2653 * so just send the "connect succeeded" message to the
2654 * client, flush the rest, and get out of the way.
2656 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
2664 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2666 /* we're finished with the client's header */
2669 maxfd = (csp->cfd > csp->sfd) ? csp->cfd : csp->sfd;
2671 /* pass data between the client and server
2672 * until one or the other shuts down the connection.
2681 * FD_ZERO here seems to point to an errant macro which crashes.
2682 * So do this by hand for now...
2684 memset(&rfds,0x00,sizeof(fd_set));
2688 FD_SET(csp->cfd, &rfds);
2689 FD_SET(csp->sfd, &rfds);
2691 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2692 if ((csp->flags & CSP_FLAG_CHUNKED)
2693 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
2694 && ((csp->iob->eod - csp->iob->cur) >= 5)
2695 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
2697 log_error(LOG_LEVEL_CONNECT,
2698 "Looks like we read the last chunk together with "
2699 "the server headers. We better stop reading.");
2700 byte_count = (size_t)(csp->iob->eod - csp->iob->cur);
2701 csp->expected_content_length = byte_count;
2702 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2704 if (server_body && server_response_is_complete(csp, byte_count))
2706 log_error(LOG_LEVEL_CONNECT,
2707 "Done reading from server. Expected content length: %d. "
2708 "Actual content length: %d. Most recently received: %d.",
2709 csp->expected_content_length, byte_count, len);
2712 * XXX: should not jump around,
2713 * chat() is complicated enough already.
2717 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2719 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
2723 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2724 mark_server_socket_tainted(csp);
2729 * This is the body of the browser's request,
2730 * just read and write it.
2732 if (FD_ISSET(csp->cfd, &rfds))
2734 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2738 /* XXX: not sure if this is necessary. */
2739 mark_server_socket_tainted(csp);
2740 break; /* "game over, man" */
2743 if (write_socket(csp->sfd, buf, (size_t)len))
2745 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2746 mark_server_socket_tainted(csp);
2753 * The server wants to talk. It could be the header or the body.
2754 * If `hdr' is null, then it's the header otherwise it's the body.
2755 * FIXME: Does `hdr' really mean `host'? No.
2757 if (FD_ISSET(csp->sfd, &rfds))
2760 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2764 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2766 if (http->ssl && (fwd->forward_host == NULL))
2769 * Just hang up. We already confirmed the client's CONNECT
2770 * request with status code 200 and unencrypted content is
2771 * no longer welcome.
2773 log_error(LOG_LEVEL_ERROR,
2774 "CONNECT already confirmed. Unable to tell the client about the problem.");
2777 else if (byte_count)
2780 * Just hang up. We already transmitted the original headers
2781 * and parts of the original content and therefore missed the
2782 * chance to send an error message (without risking data corruption).
2784 * XXX: we could retry with a fancy range request here.
2786 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2787 "Unable to tell the client about the problem.");
2788 mark_server_socket_tainted(csp);
2792 rsp = error_response(csp, "connect-failed", errno);
2795 send_crunch_response(csp, rsp);
2801 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2802 if (csp->flags & CSP_FLAG_CHUNKED)
2804 if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2806 /* XXX: this is a temporary hack */
2807 log_error(LOG_LEVEL_CONNECT,
2808 "Looks like we reached the end of the last chunk. "
2809 "We better stop reading.");
2810 csp->expected_content_length = byte_count + (size_t)len;
2811 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2815 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2818 * Add a trailing zero to let be able to use string operations.
2819 * XXX: do we still need this with filter_popups gone?
2824 * Normally, this would indicate that we've read
2825 * as much as the server has sent us and we can
2826 * close the client connection. However, Microsoft
2827 * in its wisdom has released IIS/5 with a bug that
2828 * prevents it from sending the trailing \r\n in
2829 * a 302 redirect header (and possibly other headers).
2830 * To work around this if we've haven't parsed
2831 * a full header we'll append a trailing \r\n
2832 * and see if this now generates a valid one.
2834 * This hack shouldn't have any impacts. If we've
2835 * already transmitted the header or if this is a
2836 * SSL connection, then we won't bother with this
2837 * hack. So we only work on partially received
2838 * headers. If we append a \r\n and this still
2839 * doesn't generate a valid header, then we won't
2840 * transmit anything to the client.
2845 if (server_body || http->ssl)
2848 * If we have been buffering up the document,
2849 * now is the time to apply content modification
2850 * and send the result to the client.
2854 p = execute_content_filter(csp, content_filter);
2856 * If the content filter fails, use the original
2857 * buffer and length.
2858 * (see p != NULL ? p : csp->iob->cur below)
2862 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2865 if (JB_ERR_OK != update_server_headers(csp))
2867 log_error(LOG_LEVEL_FATAL,
2868 "Failed to update server headers. after filtering.");
2871 hdr = list_to_text(csp->headers);
2874 /* FIXME Should handle error properly */
2875 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2878 if (write_socket(csp->cfd, hdr, strlen(hdr))
2879 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
2881 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2884 mark_server_socket_tainted(csp);
2892 break; /* "game over, man" */
2896 * This is NOT the body, so
2897 * Let's pretend the server just sent us a blank line.
2899 snprintf(buf, sizeof(buf), "\r\n");
2900 len = (int)strlen(buf);
2903 * Now, let the normal header parsing algorithm below do its
2904 * job. If it fails, we'll exit instead of continuing.
2911 * If this is an SSL connection or we're in the body
2912 * of the server document, just write it to the client,
2913 * unless we need to buffer the body for later content-filtering
2915 if (server_body || http->ssl)
2920 * If there is no memory left for buffering the content, or the buffer limit
2921 * has been reached, switch to non-filtering mode, i.e. make & write the
2922 * header, flush the iob and buf, and get out of the way.
2924 if (add_to_iob(csp, buf, len))
2929 log_error(LOG_LEVEL_INFO,
2930 "Flushing header and buffers. Stepping back from filtering.");
2932 hdr = list_to_text(csp->headers);
2936 * Memory is too tight to even generate the header.
2937 * Send our static "Out-of-memory" page.
2939 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2940 rsp = cgi_error_memory();
2941 send_crunch_response(csp, rsp);
2942 mark_server_socket_tainted(csp);
2945 hdrlen = strlen(hdr);
2947 if (write_socket(csp->cfd, hdr, hdrlen)
2948 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
2949 || (write_socket(csp->cfd, buf, (size_t)len)))
2951 log_error(LOG_LEVEL_CONNECT,
2952 "Flush header and buffers to client failed: %E");
2954 mark_server_socket_tainted(csp);
2959 * Reset the byte_count to the amount of bytes
2960 * we just flushed. len will be added a few lines below,
2961 * hdrlen doesn't matter for LOG_LEVEL_CLF.
2963 byte_count = (size_t)flushed;
2965 content_filter = NULL;
2971 if (write_socket(csp->cfd, buf, (size_t)len))
2973 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2974 mark_server_socket_tainted(csp);
2978 byte_count += (size_t)len;
2983 const char *header_start;
2985 * We're still looking for the end of the server's header.
2986 * Buffer up the data we just read. If that fails, there's
2987 * little we can do but send our static out-of-memory page.
2989 if (add_to_iob(csp, buf, len))
2991 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2992 rsp = cgi_error_memory();
2993 send_crunch_response(csp, rsp);
2994 mark_server_socket_tainted(csp);
2998 header_start = csp->iob->cur;
3000 /* Convert iob into something sed() can digest */
3001 if (JB_ERR_PARSE == get_server_headers(csp))
3006 * Well, we tried our MS IIS/5 hack and it didn't work.
3007 * The header is incomplete and there isn't anything
3008 * we can do about it.
3010 log_error(LOG_LEVEL_INFO,
3011 "MS IIS5 hack didn't produce valid headers.");
3017 * Since we have to wait for more from the server before
3018 * we can parse the headers we just continue here.
3020 int header_offset = csp->iob->cur - header_start;
3021 assert(csp->iob->cur >= header_start);
3022 byte_count += (size_t)(len - header_offset);
3023 log_error(LOG_LEVEL_CONNECT, "Continuing buffering headers. "
3024 "byte_count: %d. header_offset: %d. len: %d.",
3025 byte_count, header_offset, len);
3030 /* Did we actually get anything? */
3031 if (NULL == csp->headers->first)
3033 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
3034 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3035 write_socket(csp->cfd, NO_SERVER_DATA_RESPONSE, strlen(NO_SERVER_DATA_RESPONSE));
3036 free_http_request(http);
3037 mark_server_socket_tainted(csp);
3041 assert(csp->headers->first->str);
3043 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
3044 strncmpic(csp->headers->first->str, "ICY", 3))
3047 * It doesn't look like a HTTP (or Shoutcast) response:
3048 * tell the client and log the problem.
3050 if (strlen(csp->headers->first->str) > 30)
3052 csp->headers->first->str[30] = '\0';
3054 log_error(LOG_LEVEL_ERROR,
3055 "Invalid server or forwarder response. Starts with: %s",
3056 csp->headers->first->str);
3057 log_error(LOG_LEVEL_CLF,
3058 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3059 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
3060 strlen(INVALID_SERVER_HEADERS_RESPONSE));
3061 free_http_request(http);
3062 mark_server_socket_tainted(csp);
3067 * We have now received the entire server header,
3068 * filter it and send the result to the client
3070 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
3072 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
3074 hdr = list_to_text(csp->headers);
3077 /* FIXME Should handle error properly */
3078 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3081 if (crunch_response_triggered(csp, crunchers_light))
3084 * One of the tags created by a server-header
3085 * tagger triggered a crunch. We already
3086 * delivered the crunch response to the client
3087 * and are done here after cleaning up.
3090 mark_server_socket_tainted(csp);
3093 /* Buffer and pcrs filter this if appropriate. */
3095 if (!http->ssl) /* We talk plaintext */
3097 content_filter = get_filter_function(csp);
3100 * Only write if we're not buffering for content modification
3102 if (!content_filter)
3105 * Write the server's (modified) header to
3106 * the client (along with anything else that
3107 * may be in the buffer)
3110 if (write_socket(csp->cfd, hdr, strlen(hdr))
3111 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
3113 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
3116 * The write failed, so don't bother mentioning it
3117 * to the client... it probably can't hear us anyway.
3120 mark_server_socket_tainted(csp);
3124 byte_count += (size_t)len;
3129 * XXX: the header lenght should probably
3130 * be calculated by get_server_headers().
3132 int header_length = csp->iob->cur - header_start;
3133 assert(csp->iob->cur > header_start);
3134 byte_count += (size_t)(len - header_length);
3137 /* we're finished with the server's header */
3143 * If this was a MS IIS/5 hack then it means the server
3144 * has already closed the connection. Nothing more to read.
3149 log_error(LOG_LEVEL_INFO,
3150 "Closed server connection detected with MS IIS5 hack enabled.");
3156 mark_server_socket_tainted(csp);
3157 return; /* huh? we should never get here */
3160 if (csp->content_length == 0)
3163 * If Privoxy didn't recalculate the Content-Lenght,
3164 * byte_count is still correct.
3166 csp->content_length = byte_count;
3169 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3170 && (csp->expected_content_length != byte_count))
3172 log_error(LOG_LEVEL_CONNECT,
3173 "Received %d bytes while expecting %d.",
3174 byte_count, csp->expected_content_length);
3175 mark_server_socket_tainted(csp);
3178 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
3179 csp->ip_addr_str, http->ocmd, csp->content_length);
3183 /*********************************************************************
3187 * Description : This is little more than chat. We only "serve" to
3188 * to close any socket that chat may have opened.
3191 * 1 : csp = Current client state (buffers, headers, etc...)
3195 *********************************************************************/
3197 void serve(struct client_state *csp)
3198 #else /* ifndef AMIGA */
3199 static void serve(struct client_state *csp)
3200 #endif /* def AMIGA */
3203 close_socket(csp->cfd);
3205 if (csp->sfd != JB_INVALID_SOCKET)
3207 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3208 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
3209 && (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
3211 remember_connection(csp->sfd, csp->http, forward_url(csp, csp->http));
3215 forget_connection(csp->sfd);
3216 close_socket(csp->sfd);
3219 close_socket(csp->sfd);
3220 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3223 csp->flags &= ~CSP_FLAG_ACTIVE;
3229 /*********************************************************************
3231 * Function : server_thread
3233 * Description : We only exist to call `serve' in a threaded environment.
3236 * 1 : data = Current client state (buffers, headers, etc...)
3238 * Returns : Always 0.
3240 *********************************************************************/
3241 static int32 server_thread(void *data)
3243 serve((struct client_state *) data);
3250 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3251 /*********************************************************************
3255 * Description : Print usage info & exit.
3257 * Parameters : Pointer to argv[0] for identifying ourselves
3261 *********************************************************************/
3262 static void usage(const char *myname)
3264 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
3268 #endif /* defined(unix) */
3271 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
3272 #endif /* defined(unix) */
3273 "[--version] [configfile]\n"
3274 "Aborting\n", myname);
3279 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
3282 #ifdef MUTEX_LOCKS_AVAILABLE
3283 /*********************************************************************
3285 * Function : privoxy_mutex_lock
3287 * Description : Locks a mutex.
3290 * 1 : mutex = The mutex to lock.
3292 * Returns : Void. May exit in case of errors.
3294 *********************************************************************/
3295 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
3297 #ifdef FEATURE_PTHREAD
3298 int err = pthread_mutex_lock(mutex);
3301 if (mutex != &log_mutex)
3303 log_error(LOG_LEVEL_FATAL,
3304 "Mutex locking failed: %s.\n", strerror(err));
3309 EnterCriticalSection(mutex);
3310 #endif /* def FEATURE_PTHREAD */
3314 /*********************************************************************
3316 * Function : privoxy_mutex_unlock
3318 * Description : Unlocks a mutex.
3321 * 1 : mutex = The mutex to unlock.
3323 * Returns : Void. May exit in case of errors.
3325 *********************************************************************/
3326 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
3328 #ifdef FEATURE_PTHREAD
3329 int err = pthread_mutex_unlock(mutex);
3332 if (mutex != &log_mutex)
3334 log_error(LOG_LEVEL_FATAL,
3335 "Mutex unlocking failed: %s.\n", strerror(err));
3340 LeaveCriticalSection(mutex);
3341 #endif /* def FEATURE_PTHREAD */
3345 /*********************************************************************
3347 * Function : privoxy_mutex_init
3349 * Description : Prepares a mutex.
3352 * 1 : mutex = The mutex to initialize.
3354 * Returns : Void. May exit in case of errors.
3356 *********************************************************************/
3357 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
3359 #ifdef FEATURE_PTHREAD
3360 int err = pthread_mutex_init(mutex, 0);
3363 printf("Fatal error. Mutex initialization failed: %s.\n",
3368 InitializeCriticalSection(mutex);
3369 #endif /* def FEATURE_PTHREAD */
3371 #endif /* def MUTEX_LOCKS_AVAILABLE */
3373 /*********************************************************************
3375 * Function : initialize_mutexes
3377 * Description : Prepares mutexes if mutex support is available.
3381 * Returns : Void, exits in case of errors.
3383 *********************************************************************/
3384 static void initialize_mutexes(void)
3386 #ifdef MUTEX_LOCKS_AVAILABLE
3388 * Prepare global mutex semaphores
3390 privoxy_mutex_init(&log_mutex);
3391 privoxy_mutex_init(&log_init_mutex);
3392 privoxy_mutex_init(&connection_reuse_mutex);
3395 * XXX: The assumptions below are a bit naive
3396 * and can cause locks that aren't necessary.
3398 * For example older FreeBSD versions (< 6.x?)
3399 * have no gethostbyname_r, but gethostbyname is
3402 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
3403 privoxy_mutex_init(&resolver_mutex);
3404 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
3406 * XXX: should we use a single mutex for
3407 * localtime() and gmtime() as well?
3409 #ifndef HAVE_GMTIME_R
3410 privoxy_mutex_init(&gmtime_mutex);
3411 #endif /* ndef HAVE_GMTIME_R */
3413 #ifndef HAVE_LOCALTIME_R
3414 privoxy_mutex_init(&localtime_mutex);
3415 #endif /* ndef HAVE_GMTIME_R */
3418 privoxy_mutex_init(&rand_mutex);
3419 #endif /* ndef HAVE_RANDOM */
3420 #endif /* def MUTEX_LOCKS_AVAILABLE */
3424 /*********************************************************************
3428 * Description : Load the config file and start the listen loop.
3429 * This function is a lot more *sane* with the `load_config'
3430 * and `listen_loop' functions; although it stills does
3431 * a *little* too much for my taste.
3434 * 1 : argc = Number of parameters (including $0).
3435 * 2 : argv = Array of (char *)'s to the parameters.
3437 * Returns : 1 if : can't open config file, unrecognized directive,
3438 * stats requested in multi-thread mode, can't open the
3439 * log file, can't open the jar file, listen port is invalid,
3440 * any load fails, and can't bind port.
3442 * Else main never returns, the process must be signaled
3443 * to terminate execution. Or, on Windows, use the
3444 * "File", "Exit" menu option.
3446 *********************************************************************/
3448 int real_main(int argc, const char *argv[])
3450 int main(int argc, const char *argv[])
3454 unsigned int random_seed;
3456 struct passwd *pw = NULL;
3457 struct group *grp = NULL;
3460 char *pre_chroot_nslookup_to_load_resolver = NULL;
3467 #if !defined(_WIN32)
3475 * Parse the command line arguments
3477 * XXX: simply printing usage information in case of
3478 * invalid arguments isn't particularly user friendly.
3480 while (++argc_pos < argc)
3483 /* Check to see if the service must be installed or uninstalled */
3484 if (strncmp(argv[argc_pos], "--install", 9) == 0)
3486 const char *pName = argv[argc_pos] + 9;
3489 exit( (install_service(pName)) ? 0 : 1 );
3491 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
3493 const char *pName = argv[argc_pos] + 11;
3496 exit((uninstall_service(pName)) ? 0 : 1);
3498 else if (strcmp(argv[argc_pos], "--service" ) == 0)
3500 bRunAsService = TRUE;
3501 w32_set_service_cwd();
3502 atexit(w32_service_exit_notify);
3505 #endif /* defined(_WIN32) */
3508 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3510 if (strcmp(argv[argc_pos], "--help") == 0)
3515 else if(strcmp(argv[argc_pos], "--version") == 0)
3517 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
3523 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
3528 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
3530 if (++argc_pos == argc) usage(argv[0]);
3531 pidfile = strdup(argv[argc_pos]);
3534 else if (strcmp(argv[argc_pos], "--user" ) == 0)
3536 if (++argc_pos == argc) usage(argv[argc_pos]);
3538 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
3541 if (NULL == (grp = getgrnam(p)))
3543 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
3547 if (NULL == (pw = getpwnam(argv[argc_pos])))
3549 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
3552 if (p != NULL) *--p = '\0';
3555 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
3557 if (++argc_pos == argc) usage(argv[0]);
3558 pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
3561 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
3565 #endif /* defined(unix) */
3567 else if (argc_pos + 1 != argc)
3570 * This is neither the last command line
3571 * option, nor was it recognized before,
3572 * therefore it must be invalid.
3578 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3580 configfile = argv[argc_pos];
3583 } /* -END- while (more arguments) */
3586 if ( *configfile != '/' )
3588 char cwd[BUFFER_SIZE];
3590 size_t abs_file_size;
3592 /* make config-filename absolute here */
3593 if (NULL == getcwd(cwd, sizeof(cwd)))
3595 perror("failed to get current working directory");
3600 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3601 basedir = strdup(cwd);
3603 if (NULL == basedir ||
3604 NULL == (abs_file = malloc(abs_file_size)))
3606 perror("malloc failed");
3609 strlcpy(abs_file, basedir, abs_file_size);
3610 strlcat(abs_file, "/", abs_file_size );
3611 strlcat(abs_file, configfile, abs_file_size);
3612 configfile = abs_file;
3614 #endif /* defined unix */
3618 clients->next = NULL;
3620 /* XXX: factor out initialising after the next stable release. */
3623 #elif defined(_WIN32)
3627 /* Prepare mutexes if supported and necessary. */
3628 initialize_mutexes();
3630 /* Enable logging until further notice. */
3631 init_log_module(Argv[0]);
3633 random_seed = (unsigned int)time(NULL);
3635 srandom(random_seed);
3638 #endif /* ifdef HAVE_RANDOM */
3641 * Unix signal handling
3643 * Catch the abort, interrupt and terminate signals for a graceful exit
3644 * Catch the hangup signal so the errlog can be reopened.
3645 * Ignore the broken pipe signals (FIXME: Why?)
3647 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3650 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3651 const int ignored_signals[] = { SIGPIPE, 0 };
3653 for (idx = 0; catched_signals[idx] != 0; idx++)
3655 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3656 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3658 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3659 #endif /* ifdef sun */
3661 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3665 for (idx = 0; ignored_signals[idx] != 0; idx++)
3667 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3669 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3674 #else /* ifdef _WIN32 */
3675 # ifdef _WIN_CONSOLE
3677 * We *are* in a windows console app.
3678 * Print a verbose messages about FAQ's and such
3680 printf("%s", win32_blurb);
3681 # endif /* def _WIN_CONSOLE */
3682 #endif /* def _WIN32 */
3685 /* Initialize the CGI subsystem */
3686 cgi_init_error_messages();
3689 * If runnig on unix and without the --nodaemon
3690 * option, become a daemon. I.e. fork, detach
3691 * from tty and get process group leadership
3704 if ( pid < 0 ) /* error */
3709 else if ( pid != 0 ) /* parent */
3714 * must check for errors
3715 * child died due to missing files aso
3718 wpid = waitpid( pid, &status, WNOHANG );
3727 /* Should be more portable, but not as well tested */
3732 #else /* ndef __FreeBSD__ */
3734 #endif /* ndef __FreeBSD__ */
3735 fd = open("/dev/tty", O_RDONLY);
3738 /* no error check here */
3739 ioctl( fd, TIOCNOTTY,0 );
3744 * stderr (fd 2) will be closed later on, when the
3745 * log file has been parsed.
3752 } /* -END- if (!no_daemon) */
3755 * As soon as we have written the PID file, we can switch
3756 * to the user and group ID indicated by the --user option
3762 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3764 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3770 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3772 /* Read the time zone file from /etc before doing chroot. */
3774 if (NULL != pre_chroot_nslookup_to_load_resolver
3775 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3777 /* Initialize resolver library. */
3778 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3780 if (chroot(pw->pw_dir) < 0)
3782 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3786 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3789 if (setuid(pw->pw_uid))
3791 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3795 char putenv_dummy[64];
3797 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3798 if (putenv(putenv_dummy) != 0)
3800 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3803 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3804 if (putenv(putenv_dummy) != 0)
3806 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3812 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3815 #endif /* defined unix */
3818 /* This will be FALSE unless the command line specified --service
3822 /* Yup, so now we must attempt to establish a connection
3823 * with the service dispatcher. This will only work if this
3824 * process was launched by the service control manager to
3825 * actually run as a service. If this isn't the case, i've
3826 * known it take around 30 seconds or so for the call to return.
3829 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3830 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3832 /* Service has run, and at this point is now being stopped, so just return */
3837 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3839 /* An error occurred. Usually it's because --service was wrongly specified
3840 * and we were unable to connect to the Service Control Dispatcher because
3841 * it wasn't expecting us and is therefore not listening.
3843 * For now, just continue below to call the listen_loop function.
3846 #endif /* def _WIN32 */
3856 /*********************************************************************
3858 * Function : bind_port_helper
3860 * Description : Bind the listen port. Handles logging, and aborts
3864 * 1 : config = Privoxy configuration. Specifies port
3867 * Returns : Port that was opened.
3869 *********************************************************************/
3870 static jb_socket bind_port_helper(struct configuration_spec * config)
3875 if (config->haddr == NULL)
3877 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3882 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3883 config->hport, config->haddr);
3886 result = bind_port(config->haddr, config->hport, &bfd);
3893 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3894 "There may be another Privoxy or some other "
3895 "proxy running on port %d",
3896 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
3897 config->hport, config->hport);
3900 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3901 "The hostname is not resolvable",
3902 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3905 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
3906 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3909 /* shouldn't get here */
3910 return JB_INVALID_SOCKET;
3913 config->need_bind = 0;
3920 /* Without this simple workaround we get this compiler warning from _beginthread
3921 * warning C4028: formal parameter 1 different from declaration
3923 void w32_service_listen_loop(void *p)
3927 #endif /* def _WIN32 */
3930 /*********************************************************************
3932 * Function : listen_loop
3934 * Description : bind the listen port and enter a "FOREVER" listening loop.
3940 *********************************************************************/
3941 static void listen_loop(void)
3943 struct client_state *csp = NULL;
3945 struct configuration_spec * config;
3947 config = load_config();
3949 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3951 * XXX: Should be relocated once it no
3952 * longer needs to emit log messages.
3954 initialize_reusable_connections();
3955 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3957 bfd = bind_port_helper(config);
3959 #ifdef FEATURE_GRACEFUL_TERMINATION
3960 while (!g_terminate)
3965 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
3966 while (waitpid(-1, NULL, WNOHANG) > 0)
3968 /* zombie children */
3970 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
3973 * Free data that was used by died threads
3979 * Re-open the errlog after HUP signal
3981 if (received_hup_signal)
3983 if (NULL != config->logfile)
3985 init_error_log(Argv[0], config->logfile);
3987 received_hup_signal = 0;
3991 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
3993 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
3997 csp->flags |= CSP_FLAG_ACTIVE;
3998 csp->sfd = JB_INVALID_SOCKET;
4000 csp->config = config = load_config();
4002 if ( config->need_bind )
4005 * Since we were listening to the "old port", we will not see
4006 * a "listen" param change until the next IJB request. So, at
4007 * least 1 more request must be made for us to find the new
4008 * setting. I am simply closing the old socket and binding the
4011 * Which-ever is correct, we will serve 1 more page via the
4012 * old settings. This should probably be a "show-proxy-args"
4013 * request. This should not be a so common of an operation
4014 * that this will hurt people's feelings.
4019 bfd = bind_port_helper(config);
4022 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
4024 if (!accept_connection(csp, bfd))
4026 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
4039 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
4042 #ifdef FEATURE_TOGGLE
4043 if (global_toggle_state)
4044 #endif /* def FEATURE_TOGGLE */
4046 csp->flags |= CSP_FLAG_TOGGLED_ON;
4049 if (run_loader(csp))
4051 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
4052 /* Never get here - LOG_LEVEL_FATAL causes program exit */
4056 if (block_acl(NULL,csp))
4058 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
4059 close_socket(csp->cfd);
4063 #endif /* def FEATURE_ACL */
4065 /* add it to the list of clients */
4066 csp->next = clients->next;
4067 clients->next = csp;
4069 if (config->multi_threaded)
4073 /* this is a switch () statment in the C preprocessor - ugh */
4074 #undef SELECTED_ONE_OPTION
4076 /* Use Pthreads in preference to native code */
4077 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
4078 #define SELECTED_ONE_OPTION
4080 pthread_t the_thread;
4081 pthread_attr_t attrs;
4083 pthread_attr_init(&attrs);
4084 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
4085 errno = pthread_create(&the_thread, &attrs,
4086 (void * (*)(void *))serve, csp);
4087 child_id = errno ? -1 : 0;
4088 pthread_attr_destroy(&attrs);
4092 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
4093 #define SELECTED_ONE_OPTION
4094 child_id = _beginthread(
4095 (void (*)(void *))serve,
4100 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
4101 #define SELECTED_ONE_OPTION
4102 child_id = _beginthread(
4103 (void(* _Optlink)(void*))serve,
4109 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
4110 #define SELECTED_ONE_OPTION
4112 thread_id tid = spawn_thread
4113 (server_thread, "server", B_NORMAL_PRIORITY, csp);
4115 if ((tid >= 0) && (resume_thread(tid) == B_OK))
4117 child_id = (int) tid;
4126 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
4127 #define SELECTED_ONE_OPTION
4128 csp->cfd = ReleaseSocket(csp->cfd, -1);
4131 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4132 NP_Output, Output(),
4133 NP_CloseOutput, FALSE,
4134 NP_Name, (ULONG)"privoxy child",
4138 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4139 NP_Output, Output(),
4140 NP_CloseOutput, FALSE,
4141 NP_Name, (ULONG)"privoxy child",
4142 NP_StackSize, 200*1024,
4148 ((struct Task *)child_id)->tc_UserData = csp;
4149 Signal((struct Task *)child_id, SIGF_SINGLE);
4154 #if !defined(SELECTED_ONE_OPTION)
4157 /* This block is only needed when using fork().
4158 * When using threads, the server thread was
4159 * created and run by the call to _beginthread().
4161 if (child_id == 0) /* child */
4164 #ifdef FEATURE_TOGGLE
4165 int inherited_toggle_state = global_toggle_state;
4166 #endif /* def FEATURE_TOGGLE */
4171 * If we've been toggled or we've blocked the request, tell Mom
4174 #ifdef FEATURE_TOGGLE
4175 if (inherited_toggle_state != global_toggle_state)
4177 rc |= RC_FLAG_TOGGLED;
4179 #endif /* def FEATURE_TOGGLE */
4181 #ifdef FEATURE_STATISTICS
4182 if (csp->flags & CSP_FLAG_REJECTED)
4184 rc |= RC_FLAG_BLOCKED;
4186 #endif /* ndef FEATURE_STATISTICS */
4190 else if (child_id > 0) /* parent */
4192 /* in a fork()'d environment, the parent's
4193 * copy of the client socket and the CSP
4197 #if !defined(_WIN32) && !defined(__CYGWIN__)
4199 wait( &child_status );
4202 * Evaluate child's return code: If the child has
4203 * - been toggled, toggle ourselves
4204 * - blocked its request, bump up the stats counter
4207 #ifdef FEATURE_TOGGLE
4208 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
4210 global_toggle_state = !global_toggle_state;
4212 #endif /* def FEATURE_TOGGLE */
4214 #ifdef FEATURE_STATISTICS
4216 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
4220 #endif /* def FEATURE_STATISTICS */
4222 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
4223 close_socket(csp->cfd);
4224 csp->flags &= ~CSP_FLAG_ACTIVE;
4228 #undef SELECTED_ONE_OPTION
4229 /* end of cpp switch () */
4231 if (child_id < 0) /* failed */
4233 char buf[BUFFER_SIZE];
4235 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
4237 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
4239 write_socket(csp->cfd, buf, strlen(buf));
4240 close_socket(csp->cfd);
4241 csp->flags &= ~CSP_FLAG_ACTIVE;
4252 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
4254 /* Clean up. Aim: free all memory (no leaks) */
4255 #ifdef FEATURE_GRACEFUL_TERMINATION
4257 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
4259 unload_current_config_file();
4260 unload_current_actions_file();
4261 unload_current_re_filterfile();
4262 #ifdef FEATURE_TRUST
4263 unload_current_trust_file();
4266 if (config->multi_threaded)
4273 } while ((clients->next != NULL) && (--i > 0));
4277 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
4288 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
4289 /* Cleanup - remove taskbar icon etc. */
4294 #endif /* FEATURE_GRACEFUL_TERMINATION */