1 const char jcc_rcs[] = "$Id: jcc.c,v 1.211 2008/12/06 10:05:03 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 1.211 2008/12/06 10:05:03 fabiankeil
37 * Downgrade "Received x bytes while expecting y." message to
38 * LOG_LEVEL_CONNECT as it doesn't necessarily indicate an error.
40 * Revision 1.210 2008/12/02 22:03:18 fabiankeil
41 * Don't miscalculate byte_count if we don't get all the
42 * server headers with one read_socket() call. With keep-alive
43 * support enabled, this caused delays until the server closed
46 * Revision 1.209 2008/11/27 09:44:04 fabiankeil
47 * Cosmetics for the last commit: Don't watch out for
48 * the last chunk if the content isn't chunk-encoded or
49 * if we already determined the content length previously.
51 * Revision 1.208 2008/11/26 18:24:17 fabiankeil
52 * Recognize that the server response is complete if the
53 * last chunk is read together with the server headers.
56 * Revision 1.207 2008/11/25 17:25:16 fabiankeil
57 * Don't convert the client-header list to text until we need to.
59 * Revision 1.206 2008/11/23 17:00:11 fabiankeil
60 * Some more chat() cosmetics.
62 * Revision 1.205 2008/11/16 12:43:49 fabiankeil
63 * Turn keep-alive support into a runtime feature
64 * that is disabled by setting keep-alive-timeout
65 * to a negative value.
67 * Revision 1.204 2008/11/06 19:42:17 fabiankeil
68 * Fix last-chunk detection hack to also apply
69 * if buf[] contains nothing but the last-chunk.
71 * Revision 1.203 2008/11/06 18:34:35 fabiankeil
72 * Factor receive_client_request() and
73 * parse_client_request() out of chat().
75 * Revision 1.202 2008/11/02 18:40:34 fabiankeil
76 * If we received a different amount of data than we expected,
77 * log a warning and make sure the server socket isn't reused.
79 * Revision 1.201 2008/11/02 16:48:20 fabiankeil
80 * Revert revision 1.195 and try again.
82 * Revision 1.200 2008/10/26 16:53:18 fabiankeil
85 * Revision 1.199 2008/10/26 15:36:10 fabiankeil
86 * Remove two debug messages with LOG_LEVEL_INFO.
88 * Revision 1.198 2008/10/22 15:19:55 fabiankeil
89 * Once More, With Feeling: if there is no logfile
90 * because the user didn't specify one, we shouldn't
91 * call init_error_log() after receiving SIGHUP either.
93 * Revision 1.197 2008/10/20 17:02:40 fabiankeil
94 * If SIGHUP is received while we aren't running in daemon
95 * mode, calling init_error_log() would be a mistake.
97 * Revision 1.196 2008/10/16 09:16:41 fabiankeil
98 * - Fix two gcc44 conversion warnings.
99 * - Don't bother logging the last five bytes
102 * Revision 1.195 2008/10/13 16:04:37 fabiankeil
103 * Make sure we don't try to reuse tainted server sockets.
105 * Revision 1.194 2008/10/12 18:35:18 fabiankeil
106 * The last commit was a bit too ambitious, apparently the content
107 * length adjustment is only necessary if we aren't buffering.
109 * Revision 1.193 2008/10/12 15:57:35 fabiankeil
110 * Fix content length calculation if we read headers
111 * and the start of the body at once. Now that we have
112 * FEATURE_CONNECTION_KEEP_ALIVE, it actually matters.
114 * Revision 1.192 2008/10/11 18:19:14 fabiankeil
115 * Even more chat() cosmetics.
117 * Revision 1.191 2008/10/11 18:00:14 fabiankeil
118 * Reformat some comments in chat().
120 * Revision 1.190 2008/10/11 14:58:00 fabiankeil
121 * In case of chunk-encoded content, stop reading if
122 * the buffer looks like it ends with the last chunk.
124 * Revision 1.189 2008/10/11 09:53:00 fabiankeil
125 * Let server_response_is_complete() deal properly with
126 * content that is neither buffered nor read all at once.
128 * Revision 1.188 2008/10/09 18:21:41 fabiankeil
129 * Flush work-in-progress changes to keep outgoing connections
130 * alive where possible. Incomplete and mostly #ifdef'd out.
132 * Revision 1.187 2008/09/07 12:35:05 fabiankeil
133 * Add mutex lock support for _WIN32.
135 * Revision 1.186 2008/09/04 08:13:58 fabiankeil
136 * Prepare for critical sections on Windows by adding a
137 * layer of indirection before the pthread mutex functions.
139 * Revision 1.185 2008/08/30 12:03:07 fabiankeil
140 * Remove FEATURE_COOKIE_JAR.
142 * Revision 1.184 2008/08/22 15:34:45 fabiankeil
143 * - Silence LLVM/Clang complaint.
144 * - Make received_hup_signal static.
145 * - Hide definitions for basedir, pidfile and received_hup_signal
146 * from __EMX__ as they only seem to be used in case of #ifdef unix.
148 * Revision 1.183 2008/08/21 07:09:35 fabiankeil
149 * Accept Shoutcast responses again. Problem reported
150 * and fix suggested by Stefan in #2062860.
152 * Revision 1.182 2008/06/27 11:13:56 fabiankeil
153 * Fix possible NULL-pointer dereference reported
154 * by din_a4 in #2003937. Pointy hat to me.
156 * Revision 1.181 2008/05/21 15:47:15 fabiankeil
157 * Streamline sed()'s prototype and declare
158 * the header parse and add structures static.
160 * Revision 1.180 2008/05/21 15:26:32 fabiankeil
161 * - Mark csp as immutable for send_crunch_response().
162 * - Fix comment spelling.
164 * Revision 1.179 2008/05/20 20:13:32 fabiankeil
165 * Factor update_server_headers() out of sed(), ditch the
166 * first_run hack and make server_patterns_light static.
168 * Revision 1.178 2008/05/10 13:23:38 fabiankeil
169 * Don't provide get_header() with the whole client state
170 * structure when it only needs access to csp->iob.
172 * Revision 1.177 2008/05/10 11:51:12 fabiankeil
173 * Make the "read the rest of the headers" loop a bit more readable.
175 * Revision 1.176 2008/05/10 11:37:57 fabiankeil
176 * - Instead of logging when the IIS5 hack is enabled, log when it fails.
177 * - Remove useless comment.
179 * Revision 1.175 2008/05/09 18:53:59 fabiankeil
180 * Fix comment grammar.
182 * Revision 1.174 2008/05/07 18:05:53 fabiankeil
183 * Remove the pointless buffer in client_protocol_is_unsupported().
185 * Revision 1.173 2008/05/06 15:09:00 fabiankeil
186 * Least-effort fix for bug #1821930 (reported by Lee):
187 * If the response doesn't look like HTTP,
188 * tell the client and log the problem.
190 * Revision 1.172 2008/04/16 16:38:21 fabiankeil
191 * Don't pass the whole csp structure to flush_socket()
192 * when it only needs a file descriptor and a buffer.
194 * Revision 1.171 2008/03/27 18:27:25 fabiankeil
195 * Remove kill-popups action.
197 * Revision 1.170 2008/03/06 16:33:46 fabiankeil
198 * If limit-connect isn't used, don't limit CONNECT requests to port 443.
200 * Revision 1.169 2008/03/04 18:30:39 fabiankeil
201 * Remove the treat-forbidden-connects-like-blocks action. We now
202 * use the "blocked" page for forbidden CONNECT requests by default.
204 * Revision 1.168 2008/03/02 12:25:25 fabiankeil
205 * Also use shiny new connect_port_is_forbidden() in jcc.c.
207 * Revision 1.167 2008/02/23 16:57:12 fabiankeil
208 * Rename url_actions() to get_url_actions() and let it
209 * use the standard parameter ordering.
211 * Revision 1.166 2008/02/23 16:33:43 fabiankeil
212 * Let forward_url() use the standard parameter ordering
213 * and mark its second parameter immutable.
215 * Revision 1.165 2008/02/02 19:36:56 fabiankeil
216 * Remove the "Listening ... for local connections only" log message.
217 * Whether or not remote connections are able to reach Privoxy is up
218 * to the operating system.
220 * Revision 1.164 2007/12/16 18:32:46 fabiankeil
221 * Prevent the log messages for CONNECT requests to unacceptable
222 * ports from printing the limit-connect argument as [null] if
223 * limit-connect hasn't been explicitly enabled.
225 * Revision 1.163 2007/12/13 01:47:11 david__schmidt
226 * Make sure all console-mode apps get a usage() instance
228 * Revision 1.162 2007/12/06 17:54:57 fabiankeil
229 * Reword NO_SERVER_DATA_RESPONSE to make it harder
230 * to misunderstand what the message is all about.
232 * Revision 1.161 2007/12/04 19:44:22 fabiankeil
233 * Unbreak trustfile which previously didn't work without
234 * FEATURE_TOGGLE. Fixes BR#1843585, reported by Lee.
236 * Revision 1.160 2007/11/29 18:00:29 fabiankeil
237 * Plug memory leak. Spotted by Valgrind, triggered by
238 * Privoxy-Regression-Test feeding proxyfuzz.py.
240 * Revision 1.159 2007/11/24 14:34:09 fabiankeil
241 * In the HTTP snipplets, refer to the client as client.
243 * Revision 1.158 2007/11/11 16:44:17 fabiankeil
244 * Emit a log message when activating the MS IIS5 hack.
246 * Revision 1.157 2007/11/03 17:34:49 fabiankeil
247 * Log the "weak randomization factor" warning only
248 * once for mingw32 and provide some more details.
250 * Revision 1.156 2007/11/01 18:20:58 fabiankeil
251 * Initialize log module after initializing mutexes, future
252 * deadlocks in that code should now work cross-platform.
254 * Revision 1.155 2007/10/23 20:12:45 fabiankeil
255 * Fix first CSUCCEED line to end in \r\n as required by RFC1945.
256 * Reported by Bert van Leeuwen in BR#1818808.
258 * Revision 1.154 2007/10/19 17:00:08 fabiankeil
259 * Downgrade "Flushing header and buffers" message to LOG_LEVEL_INFO.
261 * Revision 1.153 2007/10/14 14:12:41 fabiankeil
262 * When in daemon mode, close stderr after the configuration file has been
263 * parsed the first time. If logfile isn't set, stop logging. Fixes BR#897436.
265 * Revision 1.152 2007/10/04 18:03:34 fabiankeil
266 * - Fix a crash when parsing invalid requests whose first header
267 * is rejected by get_header(). Regression (re?)introduced
268 * in r1.143 by yours truly.
269 * - Move ACTION_VANILLA_WAFER handling into parsers.c's
270 * client_cookie_adder() to make sure send-vanilla-wafer can be
271 * controlled through tags (and thus regression-tested).
273 * Revision 1.151 2007/09/29 10:21:16 fabiankeil
274 * - Move get_filter_function() from jcc.c to filters.c
275 * so the filter functions can be static.
276 * - Don't bother filtering body-less responses.
278 * Revision 1.150 2007/09/28 16:39:29 fabiankeil
279 * Execute content filters through execute_content_filter().
281 * Revision 1.149 2007/09/04 15:08:48 fabiankeil
282 * Initialize req to NULL to make sure it's defined if the
283 * first read_socket() call fails. Reported by icmp30.
285 * Revision 1.148 2007/08/26 16:47:13 fabiankeil
286 * Add Stephen Gildea's --pre-chroot-nslookup patch [#1276666],
287 * extensive comments moved to user manual.
289 * Revision 1.147 2007/08/25 14:42:40 fabiankeil
290 * Don't crash if a broken header filter wiped out the request line.
292 * Revision 1.146 2007/08/20 17:09:32 fabiankeil
293 * Fix byte_count calculation in case of flushes
294 * and don't parse the server headers a second time.
296 * Revision 1.145 2007/08/19 13:13:31 fabiankeil
297 * - If there's a connection problem after we already forwarded
298 * parts of the original content, just hang up. Fixes BR#1776724.
299 * - Fix warnings about unused code on mingw32.
300 * - In case of flushes, calculate the byte count
301 * less incorrectly (I think).
303 * Revision 1.144 2007/08/11 14:43:22 fabiankeil
304 * Add some more prototypes for static functions.
306 * Revision 1.143 2007/08/05 13:58:19 fabiankeil
307 * Comment out request_contains_null_bytes() until it's used again.
309 * Revision 1.142 2007/08/05 13:50:26 fabiankeil
310 * #1763173 from Stefan Huehner: s@const static@static const@
311 * and declare some more functions static.
313 * Revision 1.141 2007/08/04 09:56:23 fabiankeil
314 * - Log rejected CONNECT requests with LOG_LEVEL_INFO
315 * and explain why they were rejected in the first place.
316 * - Fix the LOG_LEVEL_CLF message for crunches of unallowed
317 * CONNECT requests. The request line was missing.
318 * - Add two more XXX reminders as we don't have enough already.
320 * Revision 1.140 2007/07/21 11:51:36 fabiankeil
321 * As Hal noticed, checking dispatch_cgi() as the last cruncher
322 * looks like a bug if CGI requests are blocked unintentionally,
323 * so don't do it unless the user enabled the new config option
324 * "allow-cgi-request-crunching".
326 * Revision 1.139 2007/07/14 07:46:41 fabiankeil
327 * - Allow to rewrite the request destination behind the client's back.
328 * - Turn the weird-looking unconditional for loop that
329 * reads the client request into a conditional while loop.
330 * Move the stuff that only runs once out of the loop.
331 * - Move parts of chat(), server_content_type() and the
332 * necessary stuff to fix BR#1750917 into get_filter_function().
334 * Revision 1.138 2007/06/03 18:45:18 fabiankeil
335 * Temporary workaround for BR#1730105.
337 * Revision 1.137 2007/06/01 18:16:36 fabiankeil
338 * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
339 * deadlocks and crashes on OpenBSD and possibly other OS with neither
340 * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
341 * Thanks to Ralf Horstmann for report and solution.
343 * Revision 1.136 2007/06/01 16:41:11 fabiankeil
344 * Add forward-override{} to change the forwarding settings through
345 * action sections. This is mainly interesting to forward different
346 * clients differently (for example based on User-Agent or request
349 * Revision 1.135 2007/05/24 17:03:50 fabiankeil
350 * - Let usage() mention the --chroot parameter.
351 * - Use read_socket() consistently and always leave
352 * the last buffer byte alone, even in cases where
353 * null termination (currently) doesn't matter.
355 * Revision 1.134 2007/05/16 14:59:46 fabiankeil
356 * - Fix config file loading on Unix if no config file is specified.
357 * Since r1.97 Privoxy would always interpret the last argument as
358 * config file, even if it's a valid command line option.
359 * - Abort in case of unrecognized command line options. Closes #1719696.
360 * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
361 * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
363 * Revision 1.133 2007/05/04 11:23:19 fabiankeil
364 * - Don't rerun crunchers that only depend on the request URL.
365 * - Don't count redirects and CGI requests as "blocked requests".
367 * Revision 1.132 2007/04/25 15:15:17 fabiankeil
368 * Support crunching based on tags created by server-header taggers.
370 * Revision 1.131 2007/04/22 13:24:50 fabiankeil
371 * Make HTTP snippets static (again). Add a Content-Type for those
372 * with content so the browser doesn't guess it based on the URL.
374 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
375 * Move crunching and request line rebuilding out of chat().
377 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
378 * Introduce tags as alternative way to specify which
379 * actions apply to a request. At the moment tags can be
380 * created based on client and server headers.
382 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
383 * Don't CLF-log CONNECT requests twice.
385 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
386 * Log the source address for ACL-related connection drops.
388 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
389 * New config option: enforce-blocks.
391 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
392 * - Move null byte check into separate function.
393 * - Don't confuse the client with error pages
394 * if a CONNECT request was already confirmed.
396 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
397 * Speed up NULL byte escaping and only log the complete
398 * NULL byte requests with header debugging enabled.
400 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
401 * Answer requests that contain NULL bytes with
402 * a custom response instead of waiting for more
403 * data until the client eventually hangs up.
405 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
406 * - Move delivery and logging of crunched responses
407 * from chat() into send_crunch_response().
408 * - Display the reason for generating http_responses.
409 * - Log the content length for LOG_LEVEL_CLF correctly
410 * (still incorrect for some fixed responses).
411 * - Reword an incorrect comment about
412 * treat-forbidden-connects-like-blocks violating
414 * - Add some log messages.
416 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
417 * Move mutex initialization into separate
418 * function and exit in case of errors.
420 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
421 * - Start to reduce chat()'s line count and move
422 * parts of it into separate functions.
423 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
425 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
426 * - Add Proxy-Agent header to HTTP snippets that are
427 * supposed to reach HTTP clients only.
428 * - Made a few CONNECT log messages more descriptive.
429 * - Catch completely empty server responses (as seen
430 * with Tor's fake ".noconnect" top level domain).
431 * - Use shiny new "forwarding-failed" template for socks errors.
433 * Revision 1.118 2007/01/07 07:43:43 joergs
434 * AmigaOS4 support added.
436 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
437 * Added config option accept-intercepted-requests
438 * and disabled it by default.
440 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
441 * Reverted parts of my last commit
442 * to keep error handling working.
444 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
445 * Fixed gcc43 conversion warnings.
447 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
448 * Fix -pedantic ISO C warning about converting
449 * from function pointer to object pointer.
451 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
452 * Silence compiler warning I introduced with my last commit.
454 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
455 * Mutex protect rand() if POSIX threading
456 * is used, warn the user if that's not possible
457 * and stop using it on _WIN32 where it could
460 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
461 * Don't prevent core dumps by catching SIGABRT.
462 * It's rude and makes debugging unreasonable painful.
464 * Revision 1.110 2006/12/13 14:52:53 etresoft
465 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
467 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
468 * Privoxy is now able to run as intercepting
469 * proxy in combination with any packet filter
470 * that does the port redirection. The destination
471 * is extracted from the "Host:" header which
472 * should be available for nearly all requests.
474 * Moved HTTP snipplets into jcc.c.
475 * Added error message for gopher proxy requests.
477 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
478 * Only unlink the pidfile if it's actually used.
480 * Change order of interception checks to make
481 * it possible to block or redirect requests for
484 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
485 * Make pthread mutex locking more generic. Instead of
486 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
487 * and use mutex locking unless there is an _r function
488 * available. Better safe than sorry.
490 * Fixes "./configure --disable-pthread" and should result
491 * in less threading-related problems on pthread-using platforms,
492 * but it still doesn't fix BR#1122404.
494 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
495 * Move pthread.h inclusion from jcc.c to jcc.h.
496 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
498 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
499 * Don't exit after receiving the second SIGHUP on Solaris.
501 * Fixes BR 1052235, but the same problem may exist on other
502 * systems. Once 3.0.6 is out we should use sigset()
503 * where available and see if it breaks anything.
505 * Revision 1.104 2006/09/23 13:26:38 roro
506 * Replace TABs by spaces in source code.
508 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
509 * Fix +redirect{}. Didn't work with -fast-redirects.
511 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
512 * Respond with 400 and a short text message
513 * if the client tries to use Privoxy as FTP proxy.
515 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
516 * Make number of retries in case of forwarded-connect problems
517 * a config file option (forwarded-connect-retries) and use 0 as
520 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
521 * Set random(3) seed.
523 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
524 * Follow the OpenBSD port's lead and protect the resolve
525 * functions on OpenBSD as well.
527 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
528 * --user fix. Only use the user as group if no group is specified.
529 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
531 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
532 * Windows service (re-)integration
536 * --install[:service_name]
537 * --uninstall[:service_name]
540 * They work as follows:
541 * --install will create a service for you and then terminate.
542 * By default the service name will be "privoxy" (without the quotes).
543 * However you can run multiple services if you wish, just by adding
544 * a colon and then a name (no spaces).
546 * --uninstall follows the exact same rules a --install.
548 * --service is used when the program is executed by the service
549 * control manager, and in normal circumstances would never be
550 * used as a command line argument.
552 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
553 * Windows service integration
555 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
556 * Incorporate Fabian Keil's patch work:
557 http://www.fabiankeil.de/sourcecode/privoxy/
559 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
560 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
561 * with what was really the latest development (the v_3_0_branch branch)
563 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
564 * Thanks to Jindrich Makovicka for a race condition fix for the log
565 * file. The race condition remains for non-pthread implementations.
566 * Reference patch #1175720.
568 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
569 * Add the ability to check jpeg images for invalid
570 * lengths of comment blocks. Defensive strategy
571 * against the exploit:
572 * Microsoft Security Bulletin MS04-028
573 * Buffer Overrun in JPEG Processing (GDI+) Could
574 * Allow Code Execution (833987)
575 * Enabled with +inspect-jpegs in actions files.
577 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
578 * - Fixed usage info for non-unix platforms
579 * - Fixed small cmdline parsing bug
581 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
582 * Diagnostics: Now preserve the returncode of pthread_create
583 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
585 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
586 * No longer ignore SIGCHLD. Fixes bug #769381
588 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
589 * Close jarfile on graceful exit, remove stray line
591 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
592 * Cosmetics: Killed a warning, a typo and an allocation left at exit
594 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
595 * No longer rely on non-POSIX.1 extensions of getcwd().
598 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
599 * Replaced setenv() by posix-compliant putenv()
600 * Thanks to Neil McCalden (nmcc AT users.sf.net).
602 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
603 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
605 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
606 * Clean-up and extension of improvements for forked mode:
607 * - Child's return code now consists of flags RC_FLAG_*
608 * - Reporting toggle to parent now properly #ifdef'ed
609 * - Children now report blocking to parent. This enables
610 * statistics in forked mode
612 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
613 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
614 * Children now report having been toggled through _exit(17), parents
615 * watch for that code and toggle themselves if found.
617 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
618 * Wrapping all *_r functions (the non-_r versions of them) with
619 * mutex semaphores for OSX. Hopefully this will take care of all
620 * of those pesky crash reports.
622 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
623 * Fixed two mostly harmless mem leaks
625 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
626 * Fix: Head of global clients list now initialized to NULL
628 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
629 * Added basic support for OPTIONS and TRACE HTTP methods:
630 * - New interceptor direct_response() added in chat().
631 * - sed() moved to earlier in the process, so that the
632 * Host: header is evaluated before actions and forwarding
635 * Revision 1.92 2002/05/08 16:00:46 oes
636 * Chat's buffer handling:
637 * - Fixed bug with unchecked out-of-mem conditions
638 * while reading client request & server headers
639 * - No longer predict if the buffer limit will be exceeded
640 * in the next read -- check add_to_iob's new
641 * return code. If buffer couldn't be extended
642 * (policy or out-of-mem) while
643 * - reading from client: abort
644 * - reading server headers: send error page
645 * - buffering server body for filter: flush,
646 * and if that fails: send error page
648 * Revision 1.91 2002/04/08 20:35:58 swa
651 * Revision 1.90 2002/04/02 14:57:28 oes
652 * Made sending wafers independent of FEATURE_COOKIE_JAR
654 * Revision 1.89 2002/03/31 17:18:59 jongfoster
655 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
657 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
658 * More compiler warning message maintenance
660 * Revision 1.87 2002/03/26 22:29:54 swa
661 * we have a new homepage!
663 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
664 * Workaround for closing the jarfile before load_config() comes around again
666 * Revision 1.85 2002/03/24 15:23:33 jongfoster
669 * Revision 1.84 2002/03/24 13:25:43 swa
670 * name change related issues
672 * Revision 1.83 2002/03/16 23:54:06 jongfoster
673 * Adding graceful termination feature, to help look for memory leaks.
674 * If you enable this (which, by design, has to be done by hand
675 * editing config.h) and then go to http://i.j.b/die, then the program
676 * will exit cleanly after the *next* request. It should free all the
677 * memory that was used.
679 * Revision 1.82 2002/03/13 00:27:05 jongfoster
682 * Revision 1.81 2002/03/12 01:42:50 oes
683 * Introduced modular filters
685 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
686 * OS/2 port maintenance:
687 * - Fixed EMX build - it had decayed a little
688 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
689 * substituted a memset for now.
691 * Revision 1.79 2002/03/09 20:03:52 jongfoster
692 * - Making various functions return int rather than size_t.
693 * (Undoing a recent change). Since size_t is unsigned on
694 * Windows, functions like read_socket that return -1 on
695 * error cannot return a size_t.
697 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
698 * crashes, and also frequently caused JB to jump to 100%
699 * CPU and stay there. (Because it thought it had just
700 * read ((unsigned)-1) == 4Gb of data...)
702 * - The signature of write_socket has changed, it now simply
703 * returns success=0/failure=nonzero.
705 * - Trying to get rid of a few warnings --with-debug on
706 * Windows, I've introduced a new type "jb_socket". This is
707 * used for the socket file descriptors. On Windows, this
708 * is SOCKET (a typedef for unsigned). Everywhere else, it's
709 * an int. The error value can't be -1 any more, so it's
710 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
711 * Windows it maps to the #define INVALID_SOCKET.)
713 * - The signature of bind_port has changed.
715 * Revision 1.78 2002/03/08 21:35:04 oes
716 * Added optional group supplement to --user option. Will now use default group of user if no group given
718 * Revision 1.77 2002/03/07 03:52:06 oes
719 * - Fixed compiler warnings etc
720 * - Improved handling of failed DNS lookups
722 * Revision 1.76 2002/03/06 22:54:35 jongfoster
723 * Automated function-comment nitpicking.
725 * Revision 1.75 2002/03/06 10:02:19 oes
726 * Fixed stupid bug when --user was not given
728 * Revision 1.74 2002/03/06 00:49:31 jongfoster
729 * Fixing warning on Windows
730 * Making #ifdefs that refer to the same variable consistently
731 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
733 * Revision 1.73 2002/03/05 23:57:30 hal9
734 * Stray character 's' on line 1618 was breaking build.
736 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
737 * - Re-enable OS/2 building after new parms were added
738 * - Fix false out of memory report when resolving CGI templates when no IP
739 * address is available of failed attempt (a la no such domain)
741 * Revision 1.71 2002/03/05 18:13:56 oes
742 * Added --user option
744 * Revision 1.70 2002/03/05 04:52:42 oes
745 * Deleted non-errlog debugging code
747 * Revision 1.69 2002/03/04 23:50:00 jongfoster
748 * Splitting off bind_port() call into bind_port_helper(), with
751 * Revision 1.68 2002/03/04 20:17:32 oes
754 * Revision 1.67 2002/03/04 18:18:57 oes
755 * - Removed _DEBUG mode
756 * - Cleand up cmdline parsing
757 * - Introduced --no-daemon, --pidfile options
758 * - Cleaned up signal handling:
759 * - Terminate cleanly on INT, TERM and ABRT
760 * - Schedule logfile for re-opening on HUP
761 * - Ignore CHLD and PIPE
762 * - Leave the rest with their default handlers
763 * - Uniform handler registration
764 * - Added usage() function
765 * - Played styleguide police
767 * Revision 1.66 2002/03/03 15:06:55 oes
768 * Re-enabled automatic config reloading
770 * Revision 1.65 2002/03/03 14:49:11 oes
771 * Fixed CLF logging: Now uses client's original HTTP request
773 * Revision 1.64 2002/03/03 09:18:03 joergs
774 * Made jumbjuster work on AmigaOS again.
776 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
777 * Clean up a little CRLF unpleasantness that suddenly appeared
779 * Revision 1.62 2002/02/20 23:17:23 jongfoster
780 * Detecting some out-of memory conditions and exiting with a log message.
782 * Revision 1.61 2002/01/17 21:01:52 jongfoster
783 * Moving all our URL and URL pattern parsing code to urlmatch.c.
785 * Revision 1.60 2001/12/30 14:07:32 steudten
786 * - Add signal handling (unix)
787 * - Add SIGHUP handler (unix)
788 * - Add creation of pidfile (unix)
789 * - Add action 'top' in rc file (RH)
790 * - Add entry 'SIGNALS' to manpage
791 * - Add exit message to logfile (unix)
793 * Revision 1.59 2001/12/13 14:07:18 oes
794 * Fixed Bug: 503 error page now sent OK
796 * Revision 1.58 2001/11/30 23:37:24 jongfoster
797 * Renaming the Win32 config file to config.txt - this is almost the
798 * same as the corresponding UNIX name "config"
800 * Revision 1.57 2001/11/16 00:47:43 jongfoster
801 * Changing the tty-disconnection code to use setsid().
803 * Revision 1.56 2001/11/13 20:20:54 jongfoster
804 * Tabs->spaces, fixing a bug with missing {} around an if()
806 * Revision 1.55 2001/11/13 20:14:53 jongfoster
807 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
809 * Revision 1.54 2001/11/07 00:03:14 steudten
810 * Give reliable return value if an error
811 * occurs not just 0 with new daemon mode.
813 * Revision 1.53 2001/11/05 21:41:43 steudten
814 * Add changes to be a real daemon just for unix os.
815 * (change cwd to /, detach from controlling tty, set
816 * process group and session leader to the own process.
818 * Add some fatal-error log message for failed malloc().
819 * Add '-d' if compiled with 'configure --with-debug' to
820 * enable debug output.
822 * Revision 1.52 2001/10/26 20:11:20 jongfoster
823 * Fixing type mismatch
825 * Revision 1.51 2001/10/26 17:38:28 oes
828 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
829 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
830 * threads to call select() simultaneously. So, it's time to do a real, live,
831 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
832 * (native). Both versions will work, but using __OS2__ offers multi-threading.
834 * Revision 1.49 2001/10/23 21:41:35 jongfoster
835 * Added call to initialize the (statically-allocated of course)
836 * "out of memory" CGI response.
838 * Revision 1.48 2001/10/10 19:56:46 jongfoster
839 * Moving some code that wasn't cookie-related out of an #ifdef
842 * Revision 1.47 2001/10/10 16:44:36 oes
843 * Added CONNECT destination port limitation check
845 * Revision 1.46 2001/10/08 15:17:41 oes
846 * Re-enabled SSL forwarding
848 * Revision 1.45 2001/10/07 15:42:11 oes
849 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
851 * Moved downgrading of the HTTP version from parse_http_request to
852 * chat(), since we can't decide if it is necessary before we have
853 * determined the actions for the URL. The HTTP command is now
854 * *always* re-built so the repairs need no longer be special-cased.
856 * filter_popups now gets a csp pointer so it can raise the new
857 * CSP_FLAG_MODIFIED flag.
861 * Added configurable size limit for the IOB. If the IOB grows so
862 * large that the next read would exceed the limit, the header
863 * is generated, and the header & unfiltered buffer are flushed
864 * to the client. Chat then continues in non-buffering,
865 * non-filtering body mode.
867 * Revision 1.44 2001/10/02 18:13:57 oes
870 * Revision 1.43 2001/10/02 15:32:13 oes
871 * Moved generation of hdr
873 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
874 * Cleaning up 2 compiler warnings on OS/2.
876 * Revision 1.41 2001/09/16 17:05:14 jongfoster
877 * Removing unused #include showarg.h
879 * Revision 1.40 2001/09/16 15:41:45 jongfoster
880 * Fixing signed/unsigned comparison warning.
882 * Revision 1.39 2001/09/16 13:21:27 jongfoster
883 * Changes to use new list functions.
885 * Revision 1.38 2001/09/16 13:01:46 jongfoster
886 * Removing redundant function call that zeroed zalloc()'d memory.
888 * Revision 1.37 2001/09/10 11:12:24 oes
889 * Deleted unused variable
891 * Revision 1.36 2001/09/10 10:56:15 oes
892 * Silenced compiler warnings
894 * Revision 1.35 2001/07/31 14:44:22 oes
895 * Deleted unused size parameter from filter_popups()
897 * Revision 1.34 2001/07/30 22:08:36 jongfoster
898 * Tidying up #defines:
899 * - All feature #defines are now of the form FEATURE_xxx
900 * - Permanently turned off WIN_GUI_EDIT
901 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
903 * Revision 1.33 2001/07/29 19:32:00 jongfoster
904 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
906 * Revision 1.32 2001/07/29 18:47:05 jongfoster
907 * Adding missing #include "loadcfg.h"
909 * Revision 1.31 2001/07/29 12:17:48 oes
910 * Applied pthread fix by Paul Lieverse
912 * Revision 1.30 2001/07/25 22:57:13 jongfoster
913 * __BEOS__ no longer overrides FEATURE_PTHREAD.
914 * This is because FEATURE_PTHREAD will soon be widely used, so I
915 * want to keep it simple.
917 * Revision 1.29 2001/07/24 12:47:06 oes
918 * Applied BeOS support update by Eugenia
920 * Revision 1.28 2001/07/23 13:26:12 oes
921 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
923 * Revision 1.27 2001/07/19 19:09:47 haroon
924 * - Added code to take care of the situation where while processing the first
925 * server response (which includes the server header), after finding the end
926 * of the headers we were not looking past the end of the headers for
927 * content modification. I enabled it for filter_popups.
928 * Someone else should look to see if other similar operations should be
929 * done to the discarded portion of the buffer.
931 * Note 2001/07/20: No, the other content modification mechanisms will process
932 * the whole iob later anyway. --oes
934 * Revision 1.26 2001/07/18 12:31:36 oes
937 * Revision 1.25 2001/07/15 19:43:49 jongfoster
938 * Supports POSIX threads.
939 * Also removed some unused #includes.
941 * Revision 1.24 2001/07/13 14:00:40 oes
942 * - Generic content modification scheme:
943 * Each feature has its own applicability flag that is set
944 * from csp->action->flags.
945 * Replaced the "filtering" int flag , by a function pointer
946 * "content_filter" to the function that will do the content
947 * modification. If it is != NULL, the document will be buffered
948 * and processed through *content_filter, which must set
949 * csp->content_length and return a modified copy of the body
950 * or return NULL (on failiure).
951 * - Changed csp->is_text to the more generic bitmap csp->content_type
952 * which can currently take the valued CT_TEXT or CT_GIF
954 * - Removed all #ifdef PCRS
956 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
957 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
958 * the `block_acl' call. This prevents a compilation error when the user
959 * does not wish to use the "ACL" feature.
961 * Revision 1.22 2001/06/29 21:45:41 oes
962 * Indentation, CRLF->LF, Tab-> Space
964 * Revision 1.21 2001/06/29 13:29:36 oes
965 * - Cleaned up, improved comments
966 * - Unified all possible interceptors (CGI,
967 * block, trust, fast_redirect) in one
968 * place, with one (CGI) answer generation
969 * mechansim. Much clearer now.
970 * - Removed the GIF image generation, which
971 * is now done in filters.c:block_url()
972 * - Made error conditions like domain lookup
973 * failiure or (various) problems while talking
974 * to the server use cgi.c:error_response()
975 * instead of generating HTML/HTTP in chat() (yuck!)
976 * - Removed logentry from cancelled commit
978 * Revision 1.20 2001/06/09 10:55:28 jongfoster
979 * Changing BUFSIZ ==> BUFFER_SIZE
981 * Revision 1.19 2001/06/07 23:12:52 jongfoster
982 * Replacing function pointer in struct gateway with a directly
983 * called function forwarded_connect().
984 * Replacing struct gateway with struct forward_spec
986 * Revision 1.18 2001/06/03 19:12:16 oes
987 * introduced new cgi handling
989 * Revision 1.17 2001/06/01 20:07:23 jongfoster
990 * Now uses action +image-blocker{} rather than config->tinygif
992 * Revision 1.16 2001/06/01 18:49:17 jongfoster
993 * Replaced "list_share" with "list" - the tiny memory gain was not
994 * worth the extra complexity.
996 * Revision 1.15 2001/05/31 21:24:47 jongfoster
997 * Changed "permission" to "action" throughout.
998 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
999 * Moved vanilla wafer check into chat(), since we must now
1000 * decide whether or not to add it based on the URL.
1002 * Revision 1.14 2001/05/29 20:14:01 joergs
1003 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
1006 * Revision 1.13 2001/05/29 09:50:24 jongfoster
1007 * Unified blocklist/imagelist/permissionslist.
1008 * File format is still under discussion, but the internal changes
1009 * are (mostly) done.
1011 * Also modified interceptor behaviour:
1012 * - We now intercept all URLs beginning with one of the following
1013 * prefixes (and *only* these prefixes):
1015 * * http://ijbswa.sf.net/config/
1016 * * http://ijbswa.sourceforge.net/config/
1017 * - New interceptors "home page" - go to http://i.j.b/ to see it.
1018 * - Internal changes so that intercepted and fast redirect pages
1019 * are not replaced with an image.
1020 * - Interceptors now have the option to send a binary page direct
1021 * to the client. (i.e. ijb-send-banner uses this)
1022 * - Implemented show-url-info interceptor. (Which is why I needed
1023 * the above interceptors changes - a typical URL is
1024 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
1025 * The previous mechanism would not have intercepted that, and
1026 * if it had been intercepted then it then it would have replaced
1027 * it with an image.)
1029 * Revision 1.12 2001/05/27 22:17:04 oes
1031 * - re_process_buffer no longer writes the modified buffer
1032 * to the client, which was very ugly. It now returns the
1033 * buffer, which it is then written by chat.
1035 * - content_length now adjusts the Content-Length: header
1036 * for modified documents rather than crunch()ing it.
1037 * (Length info in csp->content_length, which is 0 for
1038 * unmodified documents)
1040 * - For this to work, sed() is called twice when filtering.
1042 * Revision 1.11 2001/05/26 17:27:53 jongfoster
1043 * Added support for CLF and fixed LOG_LEVEL_LOG.
1044 * Also did CRLF->LF fix of my previous patch.
1046 * Revision 1.10 2001/05/26 15:26:15 jongfoster
1047 * ACL feature now provides more security by immediately dropping
1048 * connections from untrusted hosts.
1050 * Revision 1.9 2001/05/26 00:28:36 jongfoster
1051 * Automatic reloading of config file.
1052 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
1053 * Most of the global variables have been moved to a new
1054 * struct configuration_spec, accessed through csp->config->globalname
1055 * Most of the globals remaining are used by the Win32 GUI.
1057 * Revision 1.8 2001/05/25 22:43:18 jongfoster
1058 * Fixing minor memory leak and buffer overflow.
1060 * Revision 1.7 2001/05/25 22:34:30 jongfoster
1063 * Revision 1.6 2001/05/23 00:13:58 joergs
1064 * AmigaOS support fixed.
1066 * Revision 1.5 2001/05/22 18:46:04 oes
1068 * - Enabled filtering banners by size rather than URL
1069 * by adding patterns that replace all standard banner
1070 * sizes with the "Junkbuster" gif to the re_filterfile
1072 * - Enabled filtering WebBugs by providing a pattern
1073 * which kills all 1x1 images
1075 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
1076 * which is selected by the (nonstandard and therefore
1077 * capital) letter 'U' in the option string.
1078 * It causes the quantifiers to be ungreedy by default.
1079 * Appending a ? turns back to greedy (!).
1081 * - Added a new interceptor ijb-send-banner, which
1082 * sends back the "Junkbuster" gif. Without imagelist or
1083 * MSIE detection support, or if tinygif = 1, or the
1084 * URL isn't recognized as an imageurl, a lame HTML
1085 * explanation is sent instead.
1087 * - Added new feature, which permits blocking remote
1088 * script redirects and firing back a local redirect
1090 * The feature is conditionally compiled, i.e. it
1091 * can be disabled with --disable-fast-redirects,
1092 * plus it must be activated by a "fast-redirects"
1093 * line in the config file, has its own log level
1094 * and of course wants to be displayed by show-proxy-args
1095 * Note: Boy, all the #ifdefs in 1001 locations and
1096 * all the fumbling with configure.in and acconfig.h
1097 * were *way* more work than the feature itself :-(
1099 * - Because a generic redirect template was needed for
1100 * this, tinygif = 3 now uses the same.
1102 * - Moved GIFs, and other static HTTP response templates
1105 * - Some minor fixes
1107 * - Removed some >400 CRs again (Jon, you really worked
1110 * Revision 1.4 2001/05/21 19:34:01 jongfoster
1111 * Made failure to bind() a fatal error.
1113 * Revision 1.3 2001/05/20 01:21:20 jongfoster
1114 * Version 2.9.4 checkin.
1115 * - Merged popupfile and cookiefile, and added control over PCRS
1116 * filtering, in new "permissionsfile".
1117 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
1118 * file error you now get a message box (in the Win32 GUI) rather
1119 * than the program exiting with no explanation.
1120 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
1122 * - Removed tabs from "config"
1123 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
1124 * - Bumped up version number.
1126 * Revision 1.2 2001/05/17 22:34:44 oes
1127 * - Added hint on GIF char array generation to jcc.c
1128 * - Cleaned CRLF's from the sources and related files
1129 * - Repaired logging for REF and FRC
1131 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
1132 * Initial import of version 2.9.3 source tree
1135 *********************************************************************/
1141 #include <sys/types.h>
1150 # ifndef FEATURE_PTHREAD
1154 # include <windows.h>
1155 # include <process.h>
1156 # endif /* ndef FEATURE_PTHREAD */
1159 # ifndef _WIN_CONSOLE
1160 # include "w32log.h"
1161 # endif /* ndef _WIN_CONSOLE */
1162 # include "w32svrapi.h"
1164 #else /* ifndef _WIN32 */
1166 # if !defined (__OS2__)
1167 # include <unistd.h>
1168 # include <sys/wait.h>
1169 # endif /* ndef __OS2__ */
1170 # include <sys/time.h>
1171 # include <sys/stat.h>
1172 # include <sys/ioctl.h>
1175 #include <sys/termios.h>
1183 # include <signal.h>
1186 # include <socket.h> /* BeOS has select() for sockets only. */
1187 # include <OS.h> /* declarations for threads and stuff. */
1190 # if defined(__EMX__) || defined(__OS2__)
1191 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
1196 #define bzero(B,N) memset(B,0x00,n)
1200 # include <select.h>
1205 #include "project.h"
1208 #include "filters.h"
1209 #include "loaders.h"
1210 #include "parsers.h"
1211 #include "miscutil.h"
1213 #include "jbsockets.h"
1214 #include "gateway.h"
1215 #include "actions.h"
1217 #include "loadcfg.h"
1218 #include "urlmatch.h"
1220 const char jcc_h_rcs[] = JCC_H_VERSION;
1221 const char project_h_rcs[] = PROJECT_H_VERSION;
1224 struct client_state clients[1];
1225 struct file_list files[1];
1227 #ifdef FEATURE_STATISTICS
1228 int urls_read = 0; /* total nr of urls read inc rejected */
1229 int urls_rejected = 0; /* total nr of urls rejected */
1230 #endif /* def FEATURE_STATISTICS */
1232 #ifdef FEATURE_GRACEFUL_TERMINATION
1233 int g_terminate = 0;
1236 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1237 static void sig_handler(int the_signal);
1239 static int client_protocol_is_unsupported(const struct client_state *csp, char *req);
1240 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
1241 static jb_err get_server_headers(struct client_state *csp);
1242 static const char *crunch_reason(const struct http_response *rsp);
1243 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp);
1244 static char *get_request_line(struct client_state *csp);
1245 static jb_err receive_client_request(struct client_state *csp);
1246 static jb_err parse_client_request(struct client_state *csp);
1247 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
1248 static jb_err change_request_destination(struct client_state *csp);
1249 static void chat(struct client_state *csp);
1250 static void serve(struct client_state *csp);
1251 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1252 static void usage(const char *myname);
1254 static void initialize_mutexes(void);
1255 static jb_socket bind_port_helper(struct configuration_spec *config);
1256 static void listen_loop(void);
1259 void serve(struct client_state *csp);
1260 #else /* ifndef AMIGA */
1261 static void serve(struct client_state *csp);
1262 #endif /* def AMIGA */
1265 static int32 server_thread(void *data);
1266 #endif /* def __BEOS__ */
1269 #define sleep(N) Sleep(((N) * 1000))
1273 #define sleep(N) DosSleep(((N) * 100))
1276 #ifdef MUTEX_LOCKS_AVAILABLE
1278 * XXX: Does the locking stuff really belong in this file?
1280 privoxy_mutex_t log_mutex;
1281 privoxy_mutex_t log_init_mutex;
1282 privoxy_mutex_t connection_reuse_mutex;
1284 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
1285 privoxy_mutex_t resolver_mutex;
1286 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
1288 #ifndef HAVE_GMTIME_R
1289 privoxy_mutex_t gmtime_mutex;
1290 #endif /* ndef HAVE_GMTIME_R */
1292 #ifndef HAVE_LOCALTIME_R
1293 privoxy_mutex_t localtime_mutex;
1294 #endif /* ndef HAVE_GMTIME_R */
1297 privoxy_mutex_t rand_mutex;
1298 #endif /* ndef HAVE_RANDOM */
1300 #endif /* def MUTEX_LOCKS_AVAILABLE */
1303 const char *basedir = NULL;
1304 const char *pidfile = NULL;
1305 static int received_hup_signal = 0;
1306 #endif /* defined unix */
1308 /* HTTP snipplets. */
1309 static const char CSUCCEED[] =
1310 "HTTP/1.0 200 Connection established\r\n"
1311 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
1313 static const char CHEADER[] =
1314 "HTTP/1.0 400 Invalid header received from client\r\n"
1315 "Proxy-Agent: Privoxy " VERSION "\r\n"
1316 "Content-Type: text/plain\r\n"
1317 "Connection: close\r\n\r\n"
1318 "Invalid header received from client.\r\n";
1320 static const char FTP_RESPONSE[] =
1321 "HTTP/1.0 400 Invalid request received from client\r\n"
1322 "Content-Type: text/plain\r\n"
1323 "Connection: close\r\n\r\n"
1324 "Invalid request. Privoxy doesn't support FTP.\r\n";
1326 static const char GOPHER_RESPONSE[] =
1327 "HTTP/1.0 400 Invalid request received from client\r\n"
1328 "Content-Type: text/plain\r\n"
1329 "Connection: close\r\n\r\n"
1330 "Invalid request. Privoxy doesn't support gopher.\r\n";
1332 /* XXX: should be a template */
1333 static const char MISSING_DESTINATION_RESPONSE[] =
1334 "HTTP/1.0 400 Bad request received from client\r\n"
1335 "Proxy-Agent: Privoxy " VERSION "\r\n"
1336 "Content-Type: text/plain\r\n"
1337 "Connection: close\r\n\r\n"
1338 "Bad request. Privoxy was unable to extract the destination.\r\n";
1340 /* XXX: should be a template */
1341 static const char NO_SERVER_DATA_RESPONSE[] =
1342 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1343 "Proxy-Agent: Privoxy " VERSION "\r\n"
1344 "Content-Type: text/plain\r\n"
1345 "Connection: close\r\n\r\n"
1346 "Empty server or forwarder response.\r\n"
1347 "The connection has been closed but Privoxy didn't receive any data.\r\n";
1349 /* XXX: should be a template */
1350 static const char INVALID_SERVER_HEADERS_RESPONSE[] =
1351 "HTTP/1.0 502 Server or forwarder response invalid\r\n"
1352 "Proxy-Agent: Privoxy " VERSION "\r\n"
1353 "Content-Type: text/plain\r\n"
1354 "Connection: close\r\n\r\n"
1355 "Bad response. The server or forwarder response doesn't look like HTTP.\r\n";
1358 /* XXX: should be a template */
1359 static const char NULL_BYTE_RESPONSE[] =
1360 "HTTP/1.0 400 Bad request received from client\r\n"
1361 "Proxy-Agent: Privoxy " VERSION "\r\n"
1362 "Content-Type: text/plain\r\n"
1363 "Connection: close\r\n\r\n"
1364 "Bad request. Null byte(s) before end of request.\r\n";
1367 /* XXX: should be a template */
1368 static const char MESSED_UP_REQUEST_RESPONSE[] =
1369 "HTTP/1.0 400 Malformed request after rewriting\r\n"
1370 "Proxy-Agent: Privoxy " VERSION "\r\n"
1371 "Content-Type: text/plain\r\n"
1372 "Connection: close\r\n\r\n"
1373 "Bad request. Messed up with header filters.\r\n";
1375 /* A function to crunch a response */
1376 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
1378 /* Crunch function flags */
1379 #define CF_NO_FLAGS 0
1380 /* Cruncher applies to forced requests as well */
1381 #define CF_IGNORE_FORCE 1
1382 /* Crunched requests are counted for the block statistics */
1383 #define CF_COUNT_AS_REJECT 2
1385 /* A crunch function and its flags */
1388 const crunch_func_ptr cruncher;
1392 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
1394 /* Complete list of cruncher functions */
1395 static const struct cruncher crunchers_all[] = {
1396 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
1397 { block_url, CF_COUNT_AS_REJECT },
1398 #ifdef FEATURE_TRUST
1399 { trust_url, CF_COUNT_AS_REJECT },
1400 #endif /* def FEATURE_TRUST */
1401 { redirect_url, CF_NO_FLAGS },
1402 { dispatch_cgi, CF_IGNORE_FORCE},
1406 /* Light version, used after tags are applied */
1407 static const struct cruncher crunchers_light[] = {
1408 { block_url, CF_COUNT_AS_REJECT },
1409 { redirect_url, CF_NO_FLAGS },
1415 * XXX: Don't we really mean
1421 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1422 /*********************************************************************
1424 * Function : sig_handler
1426 * Description : Signal handler for different signals.
1427 * Exit gracefully on TERM and INT
1428 * or set a flag that will cause the errlog
1429 * to be reopened by the main thread on HUP.
1432 * 1 : the_signal = the signal cause this function to call
1436 *********************************************************************/
1437 static void sig_handler(int the_signal)
1443 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1455 received_hup_signal = 1;
1461 * We shouldn't be here, unless we catch signals
1462 * in main() that we can't handle here!
1464 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1472 /*********************************************************************
1474 * Function : client_protocol_is_unsupported
1476 * Description : Checks if the client used a known unsupported
1477 * protocol and deals with it by sending an error
1481 * 1 : csp = Current client state (buffers, headers, etc...)
1482 * 2 : req = the first request line send by the client
1484 * Returns : TRUE if an error response has been generated, or
1485 * FALSE if the request doesn't look invalid.
1487 *********************************************************************/
1488 static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1491 * If it's a FTP or gopher request, we don't support it.
1493 * These checks are better than nothing, but they might
1494 * not work in all configurations and some clients might
1495 * have problems digesting the answer.
1497 * They should, however, never cause more problems than
1498 * Privoxy's old behaviour (returning the misleading HTML
1501 * "Could not resolve http://(ftp|gopher)://example.org").
1503 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1505 const char *response = NULL;
1506 const char *protocol = NULL;
1508 if (!strncmpic(req, "GET ftp://", 10))
1510 response = FTP_RESPONSE;
1515 response = GOPHER_RESPONSE;
1516 protocol = "GOPHER";
1518 log_error(LOG_LEVEL_ERROR,
1519 "%s tried to use Privoxy as %s proxy: %s",
1520 csp->ip_addr_str, protocol, req);
1521 log_error(LOG_LEVEL_CLF,
1522 "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1524 write_socket(csp->cfd, response, strlen(response));
1533 /*********************************************************************
1535 * Function : get_request_destination_elsewhere
1537 * Description : If the client's request was redirected into
1538 * Privoxy without the client's knowledge,
1539 * the request line lacks the destination host.
1541 * This function tries to get it elsewhere,
1542 * provided accept-intercepted-requests is enabled.
1544 * "Elsewhere" currently only means "Host: header",
1545 * but in the future we may ask the redirecting
1546 * packet filter to look the destination up.
1548 * If the destination stays unknown, an error
1549 * response is send to the client and headers
1550 * are freed so that chat() can return directly.
1553 * 1 : csp = Current client state (buffers, headers, etc...)
1554 * 2 : headers = a header list
1556 * Returns : JB_ERR_OK if the destination is now known, or
1557 * JB_ERR_PARSE if it isn't.
1559 *********************************************************************/
1560 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1564 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1566 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1567 " Privoxy isn't configured to accept intercepted requests.",
1568 csp->ip_addr_str, csp->http->cmd);
1569 /* XXX: Use correct size */
1570 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1571 csp->ip_addr_str, csp->http->cmd);
1573 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1574 destroy_list(headers);
1576 return JB_ERR_PARSE;
1578 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1580 /* Split the domain we just got for pattern matching */
1581 init_domain_components(csp->http);
1587 /* We can't work without destination. Go spread the news.*/
1589 req = list_to_text(headers);
1591 /* XXX: Use correct size */
1592 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1593 csp->ip_addr_str, csp->http->cmd);
1594 log_error(LOG_LEVEL_ERROR,
1595 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1596 csp->ip_addr_str, csp->http->cmd, req);
1599 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
1600 destroy_list(headers);
1602 return JB_ERR_PARSE;
1605 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1606 * to get the destination IP address, use it as host directly
1607 * or do a reverse DNS lookup first.
1612 /*********************************************************************
1614 * Function : get_server_headers
1616 * Description : Parses server headers in iob and fills them
1617 * into csp->headers so that they can later be
1621 * 1 : csp = Current client state (buffers, headers, etc...)
1623 * Returns : JB_ERR_OK if everything went fine, or
1624 * JB_ERR_PARSE if the headers were incomplete.
1626 *********************************************************************/
1627 static jb_err get_server_headers(struct client_state *csp)
1629 int continue_hack_in_da_house = 0;
1632 while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
1637 * continue hack in da house. Ignore the ending of
1638 * this head and continue enlisting header lines.
1639 * The reason is described below.
1641 enlist(csp->headers, "");
1642 continue_hack_in_da_house = 0;
1645 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1648 * It's a bodyless continue response, don't
1649 * stop header parsing after reaching its end.
1651 * As a result Privoxy will concatenate the
1652 * next response's head and parse and deliver
1653 * the headers as if they belonged to one request.
1655 * The client will separate them because of the
1656 * empty line between them.
1658 * XXX: What we're doing here is clearly against
1659 * the intended purpose of the continue header,
1660 * and under some conditions (HTTP/1.0 client request)
1661 * it's a standard violation.
1663 * Anyway, "sort of against the spec" is preferable
1664 * to "always getting confused by Continue responses"
1665 * (Privoxy's behaviour before this hack was added)
1667 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1668 continue_hack_in_da_house = 1;
1670 else if (*header == '\0')
1673 * If the header is empty, but the Continue hack
1674 * isn't active, we can assume that we reached the
1675 * end of the buffer before we hit the end of the
1678 * Inform the caller an let it decide how to handle it.
1680 return JB_ERR_PARSE;
1683 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1686 * XXX: Should we quit the request and return a
1687 * out of memory error page instead?
1689 log_error(LOG_LEVEL_ERROR,
1690 "Out of memory while enlisting server headers. %s lost.",
1700 /*********************************************************************
1702 * Function : crunch_reason
1704 * Description : Translates the crunch reason code into a string.
1707 * 1 : rsp = a http_response
1709 * Returns : A string with the crunch reason or an error description.
1711 *********************************************************************/
1712 static const char *crunch_reason(const struct http_response *rsp)
1714 char * reason = NULL;
1716 assert(rsp != NULL);
1719 return "Internal error while searching for crunch reason";
1722 switch (rsp->reason)
1724 case RSP_REASON_UNSUPPORTED:
1725 reason = "Unsupported HTTP feature";
1727 case RSP_REASON_BLOCKED:
1730 case RSP_REASON_UNTRUSTED:
1731 reason = "Untrusted";
1733 case RSP_REASON_REDIRECTED:
1734 reason = "Redirected";
1736 case RSP_REASON_CGI_CALL:
1737 reason = "CGI Call";
1739 case RSP_REASON_NO_SUCH_DOMAIN:
1740 reason = "DNS failure";
1742 case RSP_REASON_FORWARDING_FAILED:
1743 reason = "Forwarding failed";
1745 case RSP_REASON_CONNECT_FAILED:
1746 reason = "Connection failure";
1748 case RSP_REASON_OUT_OF_MEMORY:
1749 reason = "Out of memory (may mask other reasons)";
1752 reason = "No reason recorded";
1760 /*********************************************************************
1762 * Function : send_crunch_response
1764 * Description : Delivers already prepared response for
1765 * intercepted requests, logs the interception
1766 * and frees the response.
1769 * 1 : csp = Current client state (buffers, headers, etc...)
1770 * 1 : rsp = Fully prepared response. Will be freed on exit.
1772 * Returns : Nothing.
1774 *********************************************************************/
1775 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp)
1777 const struct http_request *http = csp->http;
1778 char status_code[4];
1780 assert(rsp != NULL);
1781 assert(rsp->head != NULL);
1786 * Not supposed to happen. If it does
1787 * anyway, treat it as an unknown error.
1789 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1790 /* return code doesn't matter */
1795 /* If rsp is still NULL, we have serious internal problems. */
1796 log_error(LOG_LEVEL_FATAL,
1797 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1801 * Extract the status code from the actual head
1802 * that was send to the client. It is the only
1803 * way to get it right for all requests, including
1804 * the fixed ones for out-of-memory problems.
1806 * A head starts like this: 'HTTP/1.1 200...'
1810 status_code[0] = rsp->head[9];
1811 status_code[1] = rsp->head[10];
1812 status_code[2] = rsp->head[11];
1813 status_code[3] = '\0';
1815 /* Write the answer to the client */
1816 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1817 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1819 /* There is nothing we can do about it. */
1820 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1823 /* Log that the request was crunched and why. */
1824 log_error(LOG_LEVEL_CRUNCH, "%s: %s%s",
1825 crunch_reason(rsp), http->hostport, http->path);
1826 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %d",
1827 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1829 /* Clean up and return */
1830 if (cgi_error_memory() != rsp)
1832 free_http_response(rsp);
1839 /*********************************************************************
1841 * Function : request_contains_null_bytes
1843 * Description : Checks for NULL bytes in the request and sends
1844 * an error message to the client if any were found.
1846 * XXX: currently not used, see comment in chat().
1849 * 1 : csp = Current client state (buffers, headers, etc...)
1850 * 2 : buf = Data from the client's request to check.
1851 * 3 : len = The data length.
1853 * Returns : TRUE if the request contained one or more NULL bytes, or
1856 *********************************************************************/
1857 static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1859 size_t c_len; /* Request lenght when treated as C string */
1861 c_len = strlen(buf);
1866 * Null byte(s) found. Log the request,
1867 * return an error response and hang up.
1869 size_t tmp_len = c_len;
1874 * Replace NULL byte(s) with '°' characters
1875 * so the request can be logged as string.
1876 * XXX: Is there a better replacement character?
1879 tmp_len += strlen(buf+tmp_len);
1880 } while (tmp_len < len);
1882 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1883 "(length=%d, strlen=%d).", csp->ip_addr_str, len, c_len);
1884 log_error(LOG_LEVEL_HEADER,
1885 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1887 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
1889 /* XXX: Log correct size */
1890 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1900 /*********************************************************************
1902 * Function : crunch_response_triggered
1904 * Description : Checks if the request has to be crunched,
1905 * and delivers the crunch response if necessary.
1908 * 1 : csp = Current client state (buffers, headers, etc...)
1909 * 2 : crunchers = list of cruncher functions to run
1911 * Returns : TRUE if the request was answered with a crunch response
1914 *********************************************************************/
1915 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
1917 struct http_response *rsp = NULL;
1918 const struct cruncher *c;
1921 * If CGI request crunching is disabled,
1922 * check the CGI dispatcher out of order to
1923 * prevent unintentional blocks or redirects.
1925 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
1926 && (NULL != (rsp = dispatch_cgi(csp))))
1928 /* Deliver, log and free the interception response. */
1929 send_crunch_response(csp, rsp);
1933 for (c = crunchers; c->cruncher != NULL; c++)
1936 * Check the cruncher if either Privoxy is toggled
1937 * on and the request isn't forced, or if the cruncher
1938 * applies to forced requests as well.
1940 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
1941 !(csp->flags & CSP_FLAG_FORCED)) ||
1942 (c->flags & CF_IGNORE_FORCE))
1944 rsp = c->cruncher(csp);
1947 /* Deliver, log and free the interception response. */
1948 send_crunch_response(csp, rsp);
1949 #ifdef FEATURE_STATISTICS
1950 if (c->flags & CF_COUNT_AS_REJECT)
1952 csp->flags |= CSP_FLAG_REJECTED;
1954 #endif /* def FEATURE_STATISTICS */
1965 /*********************************************************************
1967 * Function : build_request_line
1969 * Description : Builds the HTTP request line.
1971 * If a HTTP forwarder is used it expects the whole URL,
1972 * web servers only get the path.
1975 * 1 : csp = Current client state (buffers, headers, etc...)
1976 * 2 : fwd = The forwarding spec used for the request
1977 * XXX: Should use http->fwd instead.
1978 * 3 : request_line = The old request line which will be replaced.
1980 * Returns : Nothing. Terminates in case of memory problems.
1982 *********************************************************************/
1983 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
1985 struct http_request *http = csp->http;
1987 assert(http->ssl == 0);
1990 * Downgrade http version from 1.1 to 1.0
1991 * if +downgrade action applies.
1993 if ( (csp->action->flags & ACTION_DOWNGRADE)
1994 && (!strcmpic(http->ver, "HTTP/1.1")))
1997 http->ver = strdup("HTTP/1.0");
1999 if (http->ver == NULL)
2001 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
2006 * Rebuild the request line.
2008 freez(*request_line);
2009 *request_line = strdup(http->gpc);
2010 string_append(request_line, " ");
2012 if (fwd->forward_host)
2014 string_append(request_line, http->url);
2018 string_append(request_line, http->path);
2020 string_append(request_line, " ");
2021 string_append(request_line, http->ver);
2023 if (*request_line == NULL)
2025 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
2027 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
2031 /*********************************************************************
2033 * Function : change_request_destination
2035 * Description : Parse a (rewritten) request line and regenerate
2036 * the http request data.
2039 * 1 : csp = Current client state (buffers, headers, etc...)
2041 * Returns : Forwards the parse_http_request() return code.
2042 * Terminates in case of memory problems.
2044 *********************************************************************/
2045 static jb_err change_request_destination(struct client_state *csp)
2047 struct http_request *http = csp->http;
2050 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
2051 free_http_request(http);
2052 err = parse_http_request(csp->headers->first->str, http, csp);
2053 if (JB_ERR_OK != err)
2055 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
2056 jb_err_to_string(err));
2060 /* XXX: ocmd is a misleading name */
2061 http->ocmd = strdup(http->cmd);
2062 if (http->ocmd == NULL)
2064 log_error(LOG_LEVEL_FATAL,
2065 "Out of memory copying rewritten HTTP request line");
2073 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2074 /*********************************************************************
2076 * Function : server_response_is_complete
2078 * Description : Determines whether we should stop reading
2079 * from the server socket.
2082 * 1 : csp = Current client state (buffers, headers, etc...)
2083 * 2 : content_length = Length of content received so far.
2085 * Returns : TRUE if the response is complete,
2088 *********************************************************************/
2089 static int server_response_is_complete(struct client_state *csp, size_t content_length)
2091 int content_length_known = (csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
2093 if (!strcmpic(csp->http->gpc, "HEAD"))
2096 * "HEAD" implies no body, we are thus expecting
2097 * no content. XXX: incomplete "list" of methods?
2099 csp->expected_content_length = 0;
2100 content_length_known = TRUE;
2103 if (csp->http->status == 304)
2106 * Expect no body. XXX: incomplete "list" of status codes?
2108 csp->expected_content_length = 0;
2109 content_length_known = TRUE;
2112 return (content_length_known && ((0 == csp->expected_content_length)
2113 || (csp->expected_content_length <= content_length)));
2115 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2117 /*********************************************************************
2119 * Function : mark_server_socket_tainted
2121 * Description : Makes sure we don't reuse a server socket
2122 * (if we didn't read everything the server sent
2123 * us reusing the socket would lead to garbage).
2126 * 1 : csp = Current client state (buffers, headers, etc...)
2130 *********************************************************************/
2131 static void mark_server_socket_tainted(struct client_state *csp)
2133 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
2135 log_error(LOG_LEVEL_CONNECT, "Unsetting keep-alive flag.");
2136 csp->flags &= ~CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE;
2140 /*********************************************************************
2142 * Function : get_request_line
2144 * Description : Read the client request line.
2147 * 1 : csp = Current client state (buffers, headers, etc...)
2149 * Returns : Pointer to request line or NULL in case of errors.
2151 *********************************************************************/
2152 static char *get_request_line(struct client_state *csp)
2154 char buf[BUFFER_SIZE];
2155 char *request_line = NULL;
2158 memset(buf, 0, sizeof(buf));
2162 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2164 if (len <= 0) return NULL;
2167 * If there is no memory left for buffering the
2168 * request, there is nothing we can do but hang up
2170 if (add_to_iob(csp, buf, len))
2175 request_line = get_header(csp->iob);
2177 } while ((NULL != request_line) && ('\0' == *request_line));
2179 return request_line;
2184 /*********************************************************************
2186 * Function : receive_client_request
2188 * Description : Read the client's request (more precisely the
2189 * client headers) and answer it if necessary.
2191 * Note that since we're not using select() we could get
2192 * blocked here if a client connected, then didn't say
2196 * 1 : csp = Current client state (buffers, headers, etc...)
2198 * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
2200 *********************************************************************/
2201 static jb_err receive_client_request(struct client_state *csp)
2203 char buf[BUFFER_SIZE];
2206 struct http_request *http;
2210 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
2211 struct list header_list;
2212 struct list *headers = &header_list;
2216 memset(buf, 0, sizeof(buf));
2218 req = get_request_line(csp);
2220 if ((NULL != req) && ('\0' != *req))
2222 /* Request received. Validate and parse it. */
2224 /* Does the request line look invalid? */
2225 if (client_protocol_is_unsupported(csp, req))
2228 * Yes. The request has already been
2229 * answered with a error response, the buffers
2230 * were freed and we're done with chatting.
2232 return JB_ERR_PARSE;
2235 #ifdef FEATURE_FORCE_LOAD
2237 * If this request contains the FORCE_PREFIX and blocks
2238 * aren't enforced, get rid of it and set the force flag.
2240 if (strstr(req, FORCE_PREFIX))
2242 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
2244 log_error(LOG_LEVEL_FORCE,
2245 "Ignored force prefix in request: \"%s\".", req);
2249 strclean(req, FORCE_PREFIX);
2250 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
2251 csp->flags |= CSP_FLAG_FORCED;
2254 #endif /* def FEATURE_FORCE_LOAD */
2256 err = parse_http_request(req, http, csp);
2257 if (JB_ERR_OK != err)
2259 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", jb_err_to_string(err));
2265 if (http->cmd == NULL)
2267 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
2268 /* XXX: Use correct size */
2269 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2270 log_error(LOG_LEVEL_ERROR, "Invalid header received from %s.", csp->ip_addr_str);
2272 free_http_request(http);
2273 return JB_ERR_PARSE;
2276 /* grab the rest of the client's headers */
2280 p = get_header(csp->iob);
2284 /* There are no additional headers to read. */
2291 * We didn't receive a complete header
2292 * line yet, get the rest of it.
2294 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2297 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
2298 destroy_list(headers);
2299 return JB_ERR_PARSE;
2302 if (add_to_iob(csp, buf, len))
2305 * If there is no memory left for buffering the
2306 * request, there is nothing we can do but hang up
2308 destroy_list(headers);
2309 return JB_ERR_MEMORY;
2315 * We were able to read a complete
2316 * header and can finaly enlist it.
2323 if (http->host == NULL)
2326 * If we still don't know the request destination,
2327 * the request is invalid or the client uses
2328 * Privoxy without its knowledge.
2330 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
2333 * Our attempts to get the request destination
2334 * elsewhere failed or Privoxy is configured
2335 * to only accept proxy requests.
2337 * An error response has already been send
2338 * and we're done here.
2340 return JB_ERR_PARSE;
2345 * Determine the actions for this URL
2347 #ifdef FEATURE_TOGGLE
2348 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
2350 /* Most compatible set of actions (i.e. none) */
2351 init_current_action(csp->action);
2354 #endif /* ndef FEATURE_TOGGLE */
2356 get_url_actions(csp, http);
2360 * Save a copy of the original request for logging
2362 http->ocmd = strdup(http->cmd);
2363 if (http->ocmd == NULL)
2365 log_error(LOG_LEVEL_FATAL,
2366 "Out of memory copying HTTP request line");
2368 enlist(csp->headers, http->cmd);
2370 /* Append the previously read headers */
2371 list_append_list_unique(csp->headers, headers);
2372 destroy_list(headers);
2379 /*********************************************************************
2381 * Function : parse_client_request
2383 * Description : Parses the client's request and decides what to do
2386 * Note that since we're not using select() we could get
2387 * blocked here if a client connected, then didn't say
2391 * 1 : csp = Current client state (buffers, headers, etc...)
2393 * Returns : JB_ERR_OK or JB_ERR_PARSE
2395 *********************************************************************/
2396 static jb_err parse_client_request(struct client_state *csp)
2398 struct http_request *http = csp->http;
2401 err = sed(csp, FILTER_CLIENT_HEADERS);
2402 if (JB_ERR_OK != err)
2404 /* XXX: Should be handled in sed(). */
2405 assert(err == JB_ERR_PARSE);
2406 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers.");
2408 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2410 /* Check request line for rewrites. */
2411 if ((NULL == csp->headers->first->str)
2412 || (strcmp(http->cmd, csp->headers->first->str) &&
2413 (JB_ERR_OK != change_request_destination(csp))))
2416 * A header filter broke the request line - bail out.
2418 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
2419 /* XXX: Use correct size */
2420 log_error(LOG_LEVEL_CLF,
2421 "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
2422 log_error(LOG_LEVEL_ERROR,
2423 "Invalid request line after applying header filters.");
2424 free_http_request(http);
2426 return JB_ERR_PARSE;
2434 /*********************************************************************
2438 * Description : Once a connection to the client has been accepted,
2439 * this function is called (via serve()) to handle the
2440 * main business of the communication. When this
2441 * function returns, the caller must close the client
2444 * FIXME: chat is nearly thousand lines long.
2448 * 1 : csp = Current client state (buffers, headers, etc...)
2450 * Returns : Nothing.
2452 *********************************************************************/
2453 static void chat(struct client_state *csp)
2455 char buf[BUFFER_SIZE];
2462 int ms_iis5_hack = 0;
2463 size_t byte_count = 0;
2464 int forwarded_connect_retries = 0;
2465 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
2466 const struct forward_spec *fwd;
2467 struct http_request *http;
2468 int len; /* for buffer sizes (and negative error codes) */
2470 /* Function that does the content filtering for the current request */
2471 filter_function_ptr content_filter = NULL;
2473 /* Skeleton for HTTP response, if we should intercept the request */
2474 struct http_response *rsp;
2476 memset(buf, 0, sizeof(buf));
2480 if (receive_client_request(csp) != JB_ERR_OK)
2484 if (parse_client_request(csp) != JB_ERR_OK)
2489 /* decide how to route the HTTP request */
2490 fwd = forward_url(csp, http);
2493 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
2494 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2498 * build the http request to send to the server
2499 * we have to do one of the following:
2501 * create = use the original HTTP request to create a new
2502 * HTTP request that has either the path component
2503 * without the http://domainspec (w/path) or the
2504 * full orininal URL (w/url)
2505 * Note that the path and/or the HTTP version may
2506 * have been altered by now.
2508 * connect = Open a socket to the host:port of the server
2509 * and short-circuit server and client socket.
2511 * pass = Pass the request unchanged if forwarding a CONNECT
2512 * request to a parent proxy. Note that we'll be sending
2513 * the CFAIL message ourselves if connecting to the parent
2514 * fails, but we won't send a CSUCCEED message if it works,
2515 * since that would result in a double message (ours and the
2516 * parent's). After sending the request to the parent, we simply
2519 * here's the matrix:
2522 * +--------+--------+
2524 * 0 | create | connect|
2526 * Forwarding +--------+--------+
2528 * 1 | create | pass |
2530 * +--------+--------+
2534 if (http->ssl && connect_port_is_forbidden(csp))
2536 const char *acceptable_connect_ports =
2537 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
2538 assert(NULL != acceptable_connect_ports);
2539 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
2540 "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
2541 csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
2542 csp->action->flags |= ACTION_BLOCK;
2548 freez(csp->headers->first->str);
2549 build_request_line(csp, fwd, &csp->headers->first->str);
2553 * We have a request. Check if one of the crunchers wants it.
2555 if (crunch_response_triggered(csp, crunchers_all))
2558 * Yes. The client got the crunch response
2559 * and we are done here after cleaning up.
2561 /* XXX: why list_remove_all()? */
2562 list_remove_all(csp->headers);
2567 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2569 if (fwd->forward_host)
2571 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2572 fwd->forward_host, fwd->forward_port, http->hostport);
2576 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2579 /* here we connect to the server, gateway, or the forwarder */
2581 while ((csp->sfd = forwarded_connect(fwd, http, csp))
2582 && (errno == EINVAL)
2583 && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2585 log_error(LOG_LEVEL_ERROR,
2586 "failed request #%u to connect to %s. Trying again.",
2587 forwarded_connect_retries, http->hostport);
2590 if (csp->sfd == JB_INVALID_SOCKET)
2592 if (fwd->type != SOCKS_NONE)
2595 rsp = error_response(csp, "forwarding-failed", errno);
2597 else if (errno == EINVAL)
2599 rsp = error_response(csp, "no-such-domain", errno);
2603 rsp = error_response(csp, "connect-failed", errno);
2604 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2608 /* Write the answer to the client */
2611 send_crunch_response(csp, rsp);
2617 hdr = list_to_text(csp->headers);
2620 /* FIXME Should handle error properly */
2621 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2623 list_remove_all(csp->headers);
2625 if (fwd->forward_host || (http->ssl == 0))
2628 * Write the client's (modified) header to the server
2629 * (along with anything else that may be in the buffer)
2631 if (write_socket(csp->sfd, hdr, strlen(hdr))
2632 || (flush_socket(csp->sfd, csp->iob) < 0))
2634 log_error(LOG_LEVEL_CONNECT,
2635 "write header to: %s failed: %E", http->hostport);
2637 rsp = error_response(csp, "connect-failed", errno);
2640 send_crunch_response(csp, rsp);
2650 * We're running an SSL tunnel and we're not forwarding,
2651 * so just send the "connect succeeded" message to the
2652 * client, flush the rest, and get out of the way.
2654 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
2662 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2664 /* we're finished with the client's header */
2667 maxfd = (csp->cfd > csp->sfd) ? csp->cfd : csp->sfd;
2669 /* pass data between the client and server
2670 * until one or the other shuts down the connection.
2679 * FD_ZERO here seems to point to an errant macro which crashes.
2680 * So do this by hand for now...
2682 memset(&rfds,0x00,sizeof(fd_set));
2686 FD_SET(csp->cfd, &rfds);
2687 FD_SET(csp->sfd, &rfds);
2689 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2690 if ((csp->flags & CSP_FLAG_CHUNKED)
2691 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
2692 && ((csp->iob->eod - csp->iob->cur) >= 5)
2693 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
2695 log_error(LOG_LEVEL_CONNECT,
2696 "Looks like we read the last chunk together with "
2697 "the server headers. We better stop reading.");
2698 byte_count = (size_t)(csp->iob->eod - csp->iob->cur);
2699 csp->expected_content_length = byte_count;
2700 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2702 if (server_body && server_response_is_complete(csp, byte_count))
2704 log_error(LOG_LEVEL_CONNECT,
2705 "Done reading from server. Expected content length: %d. "
2706 "Actual content length: %d. Most recently received: %d.",
2707 csp->expected_content_length, byte_count, len);
2710 * XXX: should not jump around,
2711 * chat() is complicated enough already.
2715 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2717 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
2721 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2722 mark_server_socket_tainted(csp);
2727 * This is the body of the browser's request,
2728 * just read and write it.
2730 if (FD_ISSET(csp->cfd, &rfds))
2732 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2736 /* XXX: not sure if this is necessary. */
2737 mark_server_socket_tainted(csp);
2738 break; /* "game over, man" */
2741 if (write_socket(csp->sfd, buf, (size_t)len))
2743 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2744 mark_server_socket_tainted(csp);
2751 * The server wants to talk. It could be the header or the body.
2752 * If `hdr' is null, then it's the header otherwise it's the body.
2753 * FIXME: Does `hdr' really mean `host'? No.
2755 if (FD_ISSET(csp->sfd, &rfds))
2758 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2762 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2764 if (http->ssl && (fwd->forward_host == NULL))
2767 * Just hang up. We already confirmed the client's CONNECT
2768 * request with status code 200 and unencrypted content is
2769 * no longer welcome.
2771 log_error(LOG_LEVEL_ERROR,
2772 "CONNECT already confirmed. Unable to tell the client about the problem.");
2775 else if (byte_count)
2778 * Just hang up. We already transmitted the original headers
2779 * and parts of the original content and therefore missed the
2780 * chance to send an error message (without risking data corruption).
2782 * XXX: we could retry with a fancy range request here.
2784 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2785 "Unable to tell the client about the problem.");
2786 mark_server_socket_tainted(csp);
2790 rsp = error_response(csp, "connect-failed", errno);
2793 send_crunch_response(csp, rsp);
2799 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2800 if (csp->flags & CSP_FLAG_CHUNKED)
2802 if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2804 /* XXX: this is a temporary hack */
2805 log_error(LOG_LEVEL_CONNECT,
2806 "Looks like we reached the end of the last chunk. "
2807 "We better stop reading.");
2808 csp->expected_content_length = byte_count + (size_t)len;
2809 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2813 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2816 * Add a trailing zero to let be able to use string operations.
2817 * XXX: do we still need this with filter_popups gone?
2822 * Normally, this would indicate that we've read
2823 * as much as the server has sent us and we can
2824 * close the client connection. However, Microsoft
2825 * in its wisdom has released IIS/5 with a bug that
2826 * prevents it from sending the trailing \r\n in
2827 * a 302 redirect header (and possibly other headers).
2828 * To work around this if we've haven't parsed
2829 * a full header we'll append a trailing \r\n
2830 * and see if this now generates a valid one.
2832 * This hack shouldn't have any impacts. If we've
2833 * already transmitted the header or if this is a
2834 * SSL connection, then we won't bother with this
2835 * hack. So we only work on partially received
2836 * headers. If we append a \r\n and this still
2837 * doesn't generate a valid header, then we won't
2838 * transmit anything to the client.
2843 if (server_body || http->ssl)
2846 * If we have been buffering up the document,
2847 * now is the time to apply content modification
2848 * and send the result to the client.
2852 p = execute_content_filter(csp, content_filter);
2854 * If the content filter fails, use the original
2855 * buffer and length.
2856 * (see p != NULL ? p : csp->iob->cur below)
2860 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2863 if (JB_ERR_OK != update_server_headers(csp))
2865 log_error(LOG_LEVEL_FATAL,
2866 "Failed to update server headers. after filtering.");
2869 hdr = list_to_text(csp->headers);
2872 /* FIXME Should handle error properly */
2873 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2876 if (write_socket(csp->cfd, hdr, strlen(hdr))
2877 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
2879 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2882 mark_server_socket_tainted(csp);
2890 break; /* "game over, man" */
2894 * This is NOT the body, so
2895 * Let's pretend the server just sent us a blank line.
2897 snprintf(buf, sizeof(buf), "\r\n");
2898 len = (int)strlen(buf);
2901 * Now, let the normal header parsing algorithm below do its
2902 * job. If it fails, we'll exit instead of continuing.
2909 * If this is an SSL connection or we're in the body
2910 * of the server document, just write it to the client,
2911 * unless we need to buffer the body for later content-filtering
2913 if (server_body || http->ssl)
2918 * If there is no memory left for buffering the content, or the buffer limit
2919 * has been reached, switch to non-filtering mode, i.e. make & write the
2920 * header, flush the iob and buf, and get out of the way.
2922 if (add_to_iob(csp, buf, len))
2927 log_error(LOG_LEVEL_INFO,
2928 "Flushing header and buffers. Stepping back from filtering.");
2930 hdr = list_to_text(csp->headers);
2934 * Memory is too tight to even generate the header.
2935 * Send our static "Out-of-memory" page.
2937 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2938 rsp = cgi_error_memory();
2939 send_crunch_response(csp, rsp);
2940 mark_server_socket_tainted(csp);
2943 hdrlen = strlen(hdr);
2945 if (write_socket(csp->cfd, hdr, hdrlen)
2946 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
2947 || (write_socket(csp->cfd, buf, (size_t)len)))
2949 log_error(LOG_LEVEL_CONNECT,
2950 "Flush header and buffers to client failed: %E");
2952 mark_server_socket_tainted(csp);
2957 * Reset the byte_count to the amount of bytes
2958 * we just flushed. len will be added a few lines below,
2959 * hdrlen doesn't matter for LOG_LEVEL_CLF.
2961 byte_count = (size_t)flushed;
2963 content_filter = NULL;
2969 if (write_socket(csp->cfd, buf, (size_t)len))
2971 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2972 mark_server_socket_tainted(csp);
2976 byte_count += (size_t)len;
2981 const char *header_start;
2983 * We're still looking for the end of the server's header.
2984 * Buffer up the data we just read. If that fails, there's
2985 * little we can do but send our static out-of-memory page.
2987 if (add_to_iob(csp, buf, len))
2989 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2990 rsp = cgi_error_memory();
2991 send_crunch_response(csp, rsp);
2992 mark_server_socket_tainted(csp);
2996 header_start = csp->iob->cur;
2998 /* Convert iob into something sed() can digest */
2999 if (JB_ERR_PARSE == get_server_headers(csp))
3004 * Well, we tried our MS IIS/5 hack and it didn't work.
3005 * The header is incomplete and there isn't anything
3006 * we can do about it.
3008 log_error(LOG_LEVEL_INFO,
3009 "MS IIS5 hack didn't produce valid headers.");
3015 * Since we have to wait for more from the server before
3016 * we can parse the headers we just continue here.
3018 int header_offset = csp->iob->cur - header_start;
3019 assert(csp->iob->cur >= header_start);
3020 byte_count += (size_t)(len - header_offset);
3021 log_error(LOG_LEVEL_CONNECT, "Continuing buffering headers. "
3022 "byte_count: %d. header_offset: %d. len: %d.",
3023 byte_count, header_offset, len);
3028 /* Did we actually get anything? */
3029 if (NULL == csp->headers->first)
3031 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
3032 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3033 write_socket(csp->cfd, NO_SERVER_DATA_RESPONSE, strlen(NO_SERVER_DATA_RESPONSE));
3034 free_http_request(http);
3035 mark_server_socket_tainted(csp);
3039 assert(csp->headers->first->str);
3041 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
3042 strncmpic(csp->headers->first->str, "ICY", 3))
3045 * It doesn't look like a HTTP (or Shoutcast) response:
3046 * tell the client and log the problem.
3048 if (strlen(csp->headers->first->str) > 30)
3050 csp->headers->first->str[30] = '\0';
3052 log_error(LOG_LEVEL_ERROR,
3053 "Invalid server or forwarder response. Starts with: %s",
3054 csp->headers->first->str);
3055 log_error(LOG_LEVEL_CLF,
3056 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3057 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
3058 strlen(INVALID_SERVER_HEADERS_RESPONSE));
3059 free_http_request(http);
3060 mark_server_socket_tainted(csp);
3065 * We have now received the entire server header,
3066 * filter it and send the result to the client
3068 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
3070 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
3072 hdr = list_to_text(csp->headers);
3075 /* FIXME Should handle error properly */
3076 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3079 if (crunch_response_triggered(csp, crunchers_light))
3082 * One of the tags created by a server-header
3083 * tagger triggered a crunch. We already
3084 * delivered the crunch response to the client
3085 * and are done here after cleaning up.
3088 mark_server_socket_tainted(csp);
3091 /* Buffer and pcrs filter this if appropriate. */
3093 if (!http->ssl) /* We talk plaintext */
3095 content_filter = get_filter_function(csp);
3098 * Only write if we're not buffering for content modification
3100 if (!content_filter)
3103 * Write the server's (modified) header to
3104 * the client (along with anything else that
3105 * may be in the buffer)
3108 if (write_socket(csp->cfd, hdr, strlen(hdr))
3109 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
3111 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
3114 * The write failed, so don't bother mentioning it
3115 * to the client... it probably can't hear us anyway.
3118 mark_server_socket_tainted(csp);
3122 byte_count += (size_t)len;
3127 * XXX: the header lenght should probably
3128 * be calculated by get_server_headers().
3130 int header_length = csp->iob->cur - header_start;
3131 assert(csp->iob->cur > header_start);
3132 byte_count += (size_t)(len - header_length);
3135 /* we're finished with the server's header */
3141 * If this was a MS IIS/5 hack then it means the server
3142 * has already closed the connection. Nothing more to read.
3147 log_error(LOG_LEVEL_INFO,
3148 "Closed server connection detected with MS IIS5 hack enabled.");
3154 mark_server_socket_tainted(csp);
3155 return; /* huh? we should never get here */
3158 if (csp->content_length == 0)
3161 * If Privoxy didn't recalculate the Content-Lenght,
3162 * byte_count is still correct.
3164 csp->content_length = byte_count;
3167 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3168 && (csp->expected_content_length != byte_count))
3170 log_error(LOG_LEVEL_CONNECT,
3171 "Received %d bytes while expecting %d.",
3172 byte_count, csp->expected_content_length);
3173 mark_server_socket_tainted(csp);
3176 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
3177 csp->ip_addr_str, http->ocmd, csp->content_length);
3181 /*********************************************************************
3185 * Description : This is little more than chat. We only "serve" to
3186 * to close any socket that chat may have opened.
3189 * 1 : csp = Current client state (buffers, headers, etc...)
3193 *********************************************************************/
3195 void serve(struct client_state *csp)
3196 #else /* ifndef AMIGA */
3197 static void serve(struct client_state *csp)
3198 #endif /* def AMIGA */
3201 close_socket(csp->cfd);
3203 if (csp->sfd != JB_INVALID_SOCKET)
3205 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3206 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
3207 && (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
3209 remember_connection(csp->sfd, csp->http, forward_url(csp, csp->http));
3213 forget_connection(csp->sfd);
3214 close_socket(csp->sfd);
3217 close_socket(csp->sfd);
3218 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3221 csp->flags &= ~CSP_FLAG_ACTIVE;
3227 /*********************************************************************
3229 * Function : server_thread
3231 * Description : We only exist to call `serve' in a threaded environment.
3234 * 1 : data = Current client state (buffers, headers, etc...)
3236 * Returns : Always 0.
3238 *********************************************************************/
3239 static int32 server_thread(void *data)
3241 serve((struct client_state *) data);
3248 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3249 /*********************************************************************
3253 * Description : Print usage info & exit.
3255 * Parameters : Pointer to argv[0] for identifying ourselves
3259 *********************************************************************/
3260 static void usage(const char *myname)
3262 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
3266 #endif /* defined(unix) */
3269 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
3270 #endif /* defined(unix) */
3271 "[--version] [configfile]\n"
3272 "Aborting\n", myname);
3277 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
3280 #ifdef MUTEX_LOCKS_AVAILABLE
3281 /*********************************************************************
3283 * Function : privoxy_mutex_lock
3285 * Description : Locks a mutex.
3288 * 1 : mutex = The mutex to lock.
3290 * Returns : Void. May exit in case of errors.
3292 *********************************************************************/
3293 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
3295 #ifdef FEATURE_PTHREAD
3296 int err = pthread_mutex_lock(mutex);
3299 if (mutex != &log_mutex)
3301 log_error(LOG_LEVEL_FATAL,
3302 "Mutex locking failed: %s.\n", strerror(err));
3307 EnterCriticalSection(mutex);
3308 #endif /* def FEATURE_PTHREAD */
3312 /*********************************************************************
3314 * Function : privoxy_mutex_unlock
3316 * Description : Unlocks a mutex.
3319 * 1 : mutex = The mutex to unlock.
3321 * Returns : Void. May exit in case of errors.
3323 *********************************************************************/
3324 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
3326 #ifdef FEATURE_PTHREAD
3327 int err = pthread_mutex_unlock(mutex);
3330 if (mutex != &log_mutex)
3332 log_error(LOG_LEVEL_FATAL,
3333 "Mutex unlocking failed: %s.\n", strerror(err));
3338 LeaveCriticalSection(mutex);
3339 #endif /* def FEATURE_PTHREAD */
3343 /*********************************************************************
3345 * Function : privoxy_mutex_init
3347 * Description : Prepares a mutex.
3350 * 1 : mutex = The mutex to initialize.
3352 * Returns : Void. May exit in case of errors.
3354 *********************************************************************/
3355 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
3357 #ifdef FEATURE_PTHREAD
3358 int err = pthread_mutex_init(mutex, 0);
3361 printf("Fatal error. Mutex initialization failed: %s.\n",
3366 InitializeCriticalSection(mutex);
3367 #endif /* def FEATURE_PTHREAD */
3369 #endif /* def MUTEX_LOCKS_AVAILABLE */
3371 /*********************************************************************
3373 * Function : initialize_mutexes
3375 * Description : Prepares mutexes if mutex support is available.
3379 * Returns : Void, exits in case of errors.
3381 *********************************************************************/
3382 static void initialize_mutexes(void)
3384 #ifdef MUTEX_LOCKS_AVAILABLE
3386 * Prepare global mutex semaphores
3388 privoxy_mutex_init(&log_mutex);
3389 privoxy_mutex_init(&log_init_mutex);
3390 privoxy_mutex_init(&connection_reuse_mutex);
3393 * XXX: The assumptions below are a bit naive
3394 * and can cause locks that aren't necessary.
3396 * For example older FreeBSD versions (< 6.x?)
3397 * have no gethostbyname_r, but gethostbyname is
3400 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
3401 privoxy_mutex_init(&resolver_mutex);
3402 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
3404 * XXX: should we use a single mutex for
3405 * localtime() and gmtime() as well?
3407 #ifndef HAVE_GMTIME_R
3408 privoxy_mutex_init(&gmtime_mutex);
3409 #endif /* ndef HAVE_GMTIME_R */
3411 #ifndef HAVE_LOCALTIME_R
3412 privoxy_mutex_init(&localtime_mutex);
3413 #endif /* ndef HAVE_GMTIME_R */
3416 privoxy_mutex_init(&rand_mutex);
3417 #endif /* ndef HAVE_RANDOM */
3418 #endif /* def MUTEX_LOCKS_AVAILABLE */
3422 /*********************************************************************
3426 * Description : Load the config file and start the listen loop.
3427 * This function is a lot more *sane* with the `load_config'
3428 * and `listen_loop' functions; although it stills does
3429 * a *little* too much for my taste.
3432 * 1 : argc = Number of parameters (including $0).
3433 * 2 : argv = Array of (char *)'s to the parameters.
3435 * Returns : 1 if : can't open config file, unrecognized directive,
3436 * stats requested in multi-thread mode, can't open the
3437 * log file, can't open the jar file, listen port is invalid,
3438 * any load fails, and can't bind port.
3440 * Else main never returns, the process must be signaled
3441 * to terminate execution. Or, on Windows, use the
3442 * "File", "Exit" menu option.
3444 *********************************************************************/
3446 int real_main(int argc, const char *argv[])
3448 int main(int argc, const char *argv[])
3452 unsigned int random_seed;
3454 struct passwd *pw = NULL;
3455 struct group *grp = NULL;
3458 char *pre_chroot_nslookup_to_load_resolver = NULL;
3465 #if !defined(_WIN32)
3473 * Parse the command line arguments
3475 * XXX: simply printing usage information in case of
3476 * invalid arguments isn't particularly user friendly.
3478 while (++argc_pos < argc)
3481 /* Check to see if the service must be installed or uninstalled */
3482 if (strncmp(argv[argc_pos], "--install", 9) == 0)
3484 const char *pName = argv[argc_pos] + 9;
3487 exit( (install_service(pName)) ? 0 : 1 );
3489 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
3491 const char *pName = argv[argc_pos] + 11;
3494 exit((uninstall_service(pName)) ? 0 : 1);
3496 else if (strcmp(argv[argc_pos], "--service" ) == 0)
3498 bRunAsService = TRUE;
3499 w32_set_service_cwd();
3500 atexit(w32_service_exit_notify);
3503 #endif /* defined(_WIN32) */
3506 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3508 if (strcmp(argv[argc_pos], "--help") == 0)
3513 else if(strcmp(argv[argc_pos], "--version") == 0)
3515 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
3521 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
3526 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
3528 if (++argc_pos == argc) usage(argv[0]);
3529 pidfile = strdup(argv[argc_pos]);
3532 else if (strcmp(argv[argc_pos], "--user" ) == 0)
3534 if (++argc_pos == argc) usage(argv[argc_pos]);
3536 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
3539 if (NULL == (grp = getgrnam(p)))
3541 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
3545 if (NULL == (pw = getpwnam(argv[argc_pos])))
3547 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
3550 if (p != NULL) *--p = '\0';
3553 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
3555 if (++argc_pos == argc) usage(argv[0]);
3556 pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
3559 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
3563 #endif /* defined(unix) */
3565 else if (argc_pos + 1 != argc)
3568 * This is neither the last command line
3569 * option, nor was it recognized before,
3570 * therefore it must be invalid.
3576 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3578 configfile = argv[argc_pos];
3581 } /* -END- while (more arguments) */
3584 if ( *configfile != '/' )
3586 char cwd[BUFFER_SIZE];
3588 size_t abs_file_size;
3590 /* make config-filename absolute here */
3591 if (NULL == getcwd(cwd, sizeof(cwd)))
3593 perror("failed to get current working directory");
3598 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3599 basedir = strdup(cwd);
3601 if (NULL == basedir ||
3602 NULL == (abs_file = malloc(abs_file_size)))
3604 perror("malloc failed");
3607 strlcpy(abs_file, basedir, abs_file_size);
3608 strlcat(abs_file, "/", abs_file_size );
3609 strlcat(abs_file, configfile, abs_file_size);
3610 configfile = abs_file;
3612 #endif /* defined unix */
3616 clients->next = NULL;
3618 /* XXX: factor out initialising after the next stable release. */
3621 #elif defined(_WIN32)
3625 /* Prepare mutexes if supported and necessary. */
3626 initialize_mutexes();
3628 /* Enable logging until further notice. */
3629 init_log_module(Argv[0]);
3631 random_seed = (unsigned int)time(NULL);
3633 srandom(random_seed);
3636 #endif /* ifdef HAVE_RANDOM */
3639 * Unix signal handling
3641 * Catch the abort, interrupt and terminate signals for a graceful exit
3642 * Catch the hangup signal so the errlog can be reopened.
3643 * Ignore the broken pipe signals (FIXME: Why?)
3645 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3648 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3649 const int ignored_signals[] = { SIGPIPE, 0 };
3651 for (idx = 0; catched_signals[idx] != 0; idx++)
3653 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3654 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3656 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3657 #endif /* ifdef sun */
3659 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3663 for (idx = 0; ignored_signals[idx] != 0; idx++)
3665 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3667 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3672 #else /* ifdef _WIN32 */
3673 # ifdef _WIN_CONSOLE
3675 * We *are* in a windows console app.
3676 * Print a verbose messages about FAQ's and such
3678 printf("%s", win32_blurb);
3679 # endif /* def _WIN_CONSOLE */
3680 #endif /* def _WIN32 */
3683 /* Initialize the CGI subsystem */
3684 cgi_init_error_messages();
3687 * If runnig on unix and without the --nodaemon
3688 * option, become a daemon. I.e. fork, detach
3689 * from tty and get process group leadership
3702 if ( pid < 0 ) /* error */
3707 else if ( pid != 0 ) /* parent */
3712 * must check for errors
3713 * child died due to missing files aso
3716 wpid = waitpid( pid, &status, WNOHANG );
3725 /* Should be more portable, but not as well tested */
3730 #else /* ndef __FreeBSD__ */
3732 #endif /* ndef __FreeBSD__ */
3733 fd = open("/dev/tty", O_RDONLY);
3736 /* no error check here */
3737 ioctl( fd, TIOCNOTTY,0 );
3742 * stderr (fd 2) will be closed later on, when the
3743 * log file has been parsed.
3750 } /* -END- if (!no_daemon) */
3753 * As soon as we have written the PID file, we can switch
3754 * to the user and group ID indicated by the --user option
3760 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3762 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3768 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3770 /* Read the time zone file from /etc before doing chroot. */
3772 if (NULL != pre_chroot_nslookup_to_load_resolver
3773 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3775 /* Initialize resolver library. */
3776 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3778 if (chroot(pw->pw_dir) < 0)
3780 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3784 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3787 if (setuid(pw->pw_uid))
3789 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3793 char putenv_dummy[64];
3795 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3796 if (putenv(putenv_dummy) != 0)
3798 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3801 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3802 if (putenv(putenv_dummy) != 0)
3804 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3810 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3813 #endif /* defined unix */
3816 /* This will be FALSE unless the command line specified --service
3820 /* Yup, so now we must attempt to establish a connection
3821 * with the service dispatcher. This will only work if this
3822 * process was launched by the service control manager to
3823 * actually run as a service. If this isn't the case, i've
3824 * known it take around 30 seconds or so for the call to return.
3827 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3828 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3830 /* Service has run, and at this point is now being stopped, so just return */
3835 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3837 /* An error occurred. Usually it's because --service was wrongly specified
3838 * and we were unable to connect to the Service Control Dispatcher because
3839 * it wasn't expecting us and is therefore not listening.
3841 * For now, just continue below to call the listen_loop function.
3844 #endif /* def _WIN32 */
3854 /*********************************************************************
3856 * Function : bind_port_helper
3858 * Description : Bind the listen port. Handles logging, and aborts
3862 * 1 : config = Privoxy configuration. Specifies port
3865 * Returns : Port that was opened.
3867 *********************************************************************/
3868 static jb_socket bind_port_helper(struct configuration_spec * config)
3873 if (config->haddr == NULL)
3875 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3880 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3881 config->hport, config->haddr);
3884 result = bind_port(config->haddr, config->hport, &bfd);
3891 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3892 "There may be another Privoxy or some other "
3893 "proxy running on port %d",
3894 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
3895 config->hport, config->hport);
3898 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3899 "The hostname is not resolvable",
3900 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3903 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
3904 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3907 /* shouldn't get here */
3908 return JB_INVALID_SOCKET;
3911 config->need_bind = 0;
3918 /* Without this simple workaround we get this compiler warning from _beginthread
3919 * warning C4028: formal parameter 1 different from declaration
3921 void w32_service_listen_loop(void *p)
3925 #endif /* def _WIN32 */
3928 /*********************************************************************
3930 * Function : listen_loop
3932 * Description : bind the listen port and enter a "FOREVER" listening loop.
3938 *********************************************************************/
3939 static void listen_loop(void)
3941 struct client_state *csp = NULL;
3943 struct configuration_spec * config;
3945 config = load_config();
3947 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3949 * XXX: Should be relocated once it no
3950 * longer needs to emit log messages.
3952 initialize_reusable_connections();
3953 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3955 bfd = bind_port_helper(config);
3957 #ifdef FEATURE_GRACEFUL_TERMINATION
3958 while (!g_terminate)
3963 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
3964 while (waitpid(-1, NULL, WNOHANG) > 0)
3966 /* zombie children */
3968 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
3971 * Free data that was used by died threads
3977 * Re-open the errlog after HUP signal
3979 if (received_hup_signal)
3981 if (NULL != config->logfile)
3983 init_error_log(Argv[0], config->logfile);
3985 received_hup_signal = 0;
3989 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
3991 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
3995 csp->flags |= CSP_FLAG_ACTIVE;
3996 csp->sfd = JB_INVALID_SOCKET;
3998 csp->config = config = load_config();
4000 if ( config->need_bind )
4003 * Since we were listening to the "old port", we will not see
4004 * a "listen" param change until the next IJB request. So, at
4005 * least 1 more request must be made for us to find the new
4006 * setting. I am simply closing the old socket and binding the
4009 * Which-ever is correct, we will serve 1 more page via the
4010 * old settings. This should probably be a "show-proxy-args"
4011 * request. This should not be a so common of an operation
4012 * that this will hurt people's feelings.
4017 bfd = bind_port_helper(config);
4020 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
4022 if (!accept_connection(csp, bfd))
4024 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
4037 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
4040 #ifdef FEATURE_TOGGLE
4041 if (global_toggle_state)
4042 #endif /* def FEATURE_TOGGLE */
4044 csp->flags |= CSP_FLAG_TOGGLED_ON;
4047 if (run_loader(csp))
4049 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
4050 /* Never get here - LOG_LEVEL_FATAL causes program exit */
4054 if (block_acl(NULL,csp))
4056 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
4057 close_socket(csp->cfd);
4061 #endif /* def FEATURE_ACL */
4063 /* add it to the list of clients */
4064 csp->next = clients->next;
4065 clients->next = csp;
4067 if (config->multi_threaded)
4071 /* this is a switch () statment in the C preprocessor - ugh */
4072 #undef SELECTED_ONE_OPTION
4074 /* Use Pthreads in preference to native code */
4075 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
4076 #define SELECTED_ONE_OPTION
4078 pthread_t the_thread;
4079 pthread_attr_t attrs;
4081 pthread_attr_init(&attrs);
4082 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
4083 errno = pthread_create(&the_thread, &attrs,
4084 (void * (*)(void *))serve, csp);
4085 child_id = errno ? -1 : 0;
4086 pthread_attr_destroy(&attrs);
4090 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
4091 #define SELECTED_ONE_OPTION
4092 child_id = _beginthread(
4093 (void (*)(void *))serve,
4098 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
4099 #define SELECTED_ONE_OPTION
4100 child_id = _beginthread(
4101 (void(* _Optlink)(void*))serve,
4107 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
4108 #define SELECTED_ONE_OPTION
4110 thread_id tid = spawn_thread
4111 (server_thread, "server", B_NORMAL_PRIORITY, csp);
4113 if ((tid >= 0) && (resume_thread(tid) == B_OK))
4115 child_id = (int) tid;
4124 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
4125 #define SELECTED_ONE_OPTION
4126 csp->cfd = ReleaseSocket(csp->cfd, -1);
4129 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4130 NP_Output, Output(),
4131 NP_CloseOutput, FALSE,
4132 NP_Name, (ULONG)"privoxy child",
4136 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4137 NP_Output, Output(),
4138 NP_CloseOutput, FALSE,
4139 NP_Name, (ULONG)"privoxy child",
4140 NP_StackSize, 200*1024,
4146 ((struct Task *)child_id)->tc_UserData = csp;
4147 Signal((struct Task *)child_id, SIGF_SINGLE);
4152 #if !defined(SELECTED_ONE_OPTION)
4155 /* This block is only needed when using fork().
4156 * When using threads, the server thread was
4157 * created and run by the call to _beginthread().
4159 if (child_id == 0) /* child */
4162 #ifdef FEATURE_TOGGLE
4163 int inherited_toggle_state = global_toggle_state;
4164 #endif /* def FEATURE_TOGGLE */
4169 * If we've been toggled or we've blocked the request, tell Mom
4172 #ifdef FEATURE_TOGGLE
4173 if (inherited_toggle_state != global_toggle_state)
4175 rc |= RC_FLAG_TOGGLED;
4177 #endif /* def FEATURE_TOGGLE */
4179 #ifdef FEATURE_STATISTICS
4180 if (csp->flags & CSP_FLAG_REJECTED)
4182 rc |= RC_FLAG_BLOCKED;
4184 #endif /* ndef FEATURE_STATISTICS */
4188 else if (child_id > 0) /* parent */
4190 /* in a fork()'d environment, the parent's
4191 * copy of the client socket and the CSP
4195 #if !defined(_WIN32) && !defined(__CYGWIN__)
4197 wait( &child_status );
4200 * Evaluate child's return code: If the child has
4201 * - been toggled, toggle ourselves
4202 * - blocked its request, bump up the stats counter
4205 #ifdef FEATURE_TOGGLE
4206 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
4208 global_toggle_state = !global_toggle_state;
4210 #endif /* def FEATURE_TOGGLE */
4212 #ifdef FEATURE_STATISTICS
4214 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
4218 #endif /* def FEATURE_STATISTICS */
4220 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
4221 close_socket(csp->cfd);
4222 csp->flags &= ~CSP_FLAG_ACTIVE;
4226 #undef SELECTED_ONE_OPTION
4227 /* end of cpp switch () */
4229 if (child_id < 0) /* failed */
4231 char buf[BUFFER_SIZE];
4233 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
4235 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
4237 write_socket(csp->cfd, buf, strlen(buf));
4238 close_socket(csp->cfd);
4239 csp->flags &= ~CSP_FLAG_ACTIVE;
4250 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
4252 /* Clean up. Aim: free all memory (no leaks) */
4253 #ifdef FEATURE_GRACEFUL_TERMINATION
4255 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
4257 unload_current_config_file();
4258 unload_current_actions_file();
4259 unload_current_re_filterfile();
4260 #ifdef FEATURE_TRUST
4261 unload_current_trust_file();
4264 if (config->multi_threaded)
4271 } while ((clients->next != NULL) && (--i > 0));
4275 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
4286 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
4287 /* Cleanup - remove taskbar icon etc. */
4292 #endif /* FEATURE_GRACEFUL_TERMINATION */