1 const char jcc_rcs[] = "$Id: jcc.c,v 1.213 2008/12/15 18:45:51 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 1.213 2008/12/15 18:45:51 fabiankeil
37 * When logging crunches, log the whole URL, so one can easily
38 * differentiate between vanilla HTTP and CONNECT requests.
40 * Revision 1.212 2008/12/14 15:46:22 fabiankeil
41 * Give crunched requests their own log level.
43 * Revision 1.211 2008/12/06 10:05:03 fabiankeil
44 * Downgrade "Received x bytes while expecting y." message to
45 * LOG_LEVEL_CONNECT as it doesn't necessarily indicate an error.
47 * Revision 1.210 2008/12/02 22:03:18 fabiankeil
48 * Don't miscalculate byte_count if we don't get all the
49 * server headers with one read_socket() call. With keep-alive
50 * support enabled, this caused delays until the server closed
53 * Revision 1.209 2008/11/27 09:44:04 fabiankeil
54 * Cosmetics for the last commit: Don't watch out for
55 * the last chunk if the content isn't chunk-encoded or
56 * if we already determined the content length previously.
58 * Revision 1.208 2008/11/26 18:24:17 fabiankeil
59 * Recognize that the server response is complete if the
60 * last chunk is read together with the server headers.
63 * Revision 1.207 2008/11/25 17:25:16 fabiankeil
64 * Don't convert the client-header list to text until we need to.
66 * Revision 1.206 2008/11/23 17:00:11 fabiankeil
67 * Some more chat() cosmetics.
69 * Revision 1.205 2008/11/16 12:43:49 fabiankeil
70 * Turn keep-alive support into a runtime feature
71 * that is disabled by setting keep-alive-timeout
72 * to a negative value.
74 * Revision 1.204 2008/11/06 19:42:17 fabiankeil
75 * Fix last-chunk detection hack to also apply
76 * if buf[] contains nothing but the last-chunk.
78 * Revision 1.203 2008/11/06 18:34:35 fabiankeil
79 * Factor receive_client_request() and
80 * parse_client_request() out of chat().
82 * Revision 1.202 2008/11/02 18:40:34 fabiankeil
83 * If we received a different amount of data than we expected,
84 * log a warning and make sure the server socket isn't reused.
86 * Revision 1.201 2008/11/02 16:48:20 fabiankeil
87 * Revert revision 1.195 and try again.
89 * Revision 1.200 2008/10/26 16:53:18 fabiankeil
92 * Revision 1.199 2008/10/26 15:36:10 fabiankeil
93 * Remove two debug messages with LOG_LEVEL_INFO.
95 * Revision 1.198 2008/10/22 15:19:55 fabiankeil
96 * Once More, With Feeling: if there is no logfile
97 * because the user didn't specify one, we shouldn't
98 * call init_error_log() after receiving SIGHUP either.
100 * Revision 1.197 2008/10/20 17:02:40 fabiankeil
101 * If SIGHUP is received while we aren't running in daemon
102 * mode, calling init_error_log() would be a mistake.
104 * Revision 1.196 2008/10/16 09:16:41 fabiankeil
105 * - Fix two gcc44 conversion warnings.
106 * - Don't bother logging the last five bytes
109 * Revision 1.195 2008/10/13 16:04:37 fabiankeil
110 * Make sure we don't try to reuse tainted server sockets.
112 * Revision 1.194 2008/10/12 18:35:18 fabiankeil
113 * The last commit was a bit too ambitious, apparently the content
114 * length adjustment is only necessary if we aren't buffering.
116 * Revision 1.193 2008/10/12 15:57:35 fabiankeil
117 * Fix content length calculation if we read headers
118 * and the start of the body at once. Now that we have
119 * FEATURE_CONNECTION_KEEP_ALIVE, it actually matters.
121 * Revision 1.192 2008/10/11 18:19:14 fabiankeil
122 * Even more chat() cosmetics.
124 * Revision 1.191 2008/10/11 18:00:14 fabiankeil
125 * Reformat some comments in chat().
127 * Revision 1.190 2008/10/11 14:58:00 fabiankeil
128 * In case of chunk-encoded content, stop reading if
129 * the buffer looks like it ends with the last chunk.
131 * Revision 1.189 2008/10/11 09:53:00 fabiankeil
132 * Let server_response_is_complete() deal properly with
133 * content that is neither buffered nor read all at once.
135 * Revision 1.188 2008/10/09 18:21:41 fabiankeil
136 * Flush work-in-progress changes to keep outgoing connections
137 * alive where possible. Incomplete and mostly #ifdef'd out.
139 * Revision 1.187 2008/09/07 12:35:05 fabiankeil
140 * Add mutex lock support for _WIN32.
142 * Revision 1.186 2008/09/04 08:13:58 fabiankeil
143 * Prepare for critical sections on Windows by adding a
144 * layer of indirection before the pthread mutex functions.
146 * Revision 1.185 2008/08/30 12:03:07 fabiankeil
147 * Remove FEATURE_COOKIE_JAR.
149 * Revision 1.184 2008/08/22 15:34:45 fabiankeil
150 * - Silence LLVM/Clang complaint.
151 * - Make received_hup_signal static.
152 * - Hide definitions for basedir, pidfile and received_hup_signal
153 * from __EMX__ as they only seem to be used in case of #ifdef unix.
155 * Revision 1.183 2008/08/21 07:09:35 fabiankeil
156 * Accept Shoutcast responses again. Problem reported
157 * and fix suggested by Stefan in #2062860.
159 * Revision 1.182 2008/06/27 11:13:56 fabiankeil
160 * Fix possible NULL-pointer dereference reported
161 * by din_a4 in #2003937. Pointy hat to me.
163 * Revision 1.181 2008/05/21 15:47:15 fabiankeil
164 * Streamline sed()'s prototype and declare
165 * the header parse and add structures static.
167 * Revision 1.180 2008/05/21 15:26:32 fabiankeil
168 * - Mark csp as immutable for send_crunch_response().
169 * - Fix comment spelling.
171 * Revision 1.179 2008/05/20 20:13:32 fabiankeil
172 * Factor update_server_headers() out of sed(), ditch the
173 * first_run hack and make server_patterns_light static.
175 * Revision 1.178 2008/05/10 13:23:38 fabiankeil
176 * Don't provide get_header() with the whole client state
177 * structure when it only needs access to csp->iob.
179 * Revision 1.177 2008/05/10 11:51:12 fabiankeil
180 * Make the "read the rest of the headers" loop a bit more readable.
182 * Revision 1.176 2008/05/10 11:37:57 fabiankeil
183 * - Instead of logging when the IIS5 hack is enabled, log when it fails.
184 * - Remove useless comment.
186 * Revision 1.175 2008/05/09 18:53:59 fabiankeil
187 * Fix comment grammar.
189 * Revision 1.174 2008/05/07 18:05:53 fabiankeil
190 * Remove the pointless buffer in client_protocol_is_unsupported().
192 * Revision 1.173 2008/05/06 15:09:00 fabiankeil
193 * Least-effort fix for bug #1821930 (reported by Lee):
194 * If the response doesn't look like HTTP,
195 * tell the client and log the problem.
197 * Revision 1.172 2008/04/16 16:38:21 fabiankeil
198 * Don't pass the whole csp structure to flush_socket()
199 * when it only needs a file descriptor and a buffer.
201 * Revision 1.171 2008/03/27 18:27:25 fabiankeil
202 * Remove kill-popups action.
204 * Revision 1.170 2008/03/06 16:33:46 fabiankeil
205 * If limit-connect isn't used, don't limit CONNECT requests to port 443.
207 * Revision 1.169 2008/03/04 18:30:39 fabiankeil
208 * Remove the treat-forbidden-connects-like-blocks action. We now
209 * use the "blocked" page for forbidden CONNECT requests by default.
211 * Revision 1.168 2008/03/02 12:25:25 fabiankeil
212 * Also use shiny new connect_port_is_forbidden() in jcc.c.
214 * Revision 1.167 2008/02/23 16:57:12 fabiankeil
215 * Rename url_actions() to get_url_actions() and let it
216 * use the standard parameter ordering.
218 * Revision 1.166 2008/02/23 16:33:43 fabiankeil
219 * Let forward_url() use the standard parameter ordering
220 * and mark its second parameter immutable.
222 * Revision 1.165 2008/02/02 19:36:56 fabiankeil
223 * Remove the "Listening ... for local connections only" log message.
224 * Whether or not remote connections are able to reach Privoxy is up
225 * to the operating system.
227 * Revision 1.164 2007/12/16 18:32:46 fabiankeil
228 * Prevent the log messages for CONNECT requests to unacceptable
229 * ports from printing the limit-connect argument as [null] if
230 * limit-connect hasn't been explicitly enabled.
232 * Revision 1.163 2007/12/13 01:47:11 david__schmidt
233 * Make sure all console-mode apps get a usage() instance
235 * Revision 1.162 2007/12/06 17:54:57 fabiankeil
236 * Reword NO_SERVER_DATA_RESPONSE to make it harder
237 * to misunderstand what the message is all about.
239 * Revision 1.161 2007/12/04 19:44:22 fabiankeil
240 * Unbreak trustfile which previously didn't work without
241 * FEATURE_TOGGLE. Fixes BR#1843585, reported by Lee.
243 * Revision 1.160 2007/11/29 18:00:29 fabiankeil
244 * Plug memory leak. Spotted by Valgrind, triggered by
245 * Privoxy-Regression-Test feeding proxyfuzz.py.
247 * Revision 1.159 2007/11/24 14:34:09 fabiankeil
248 * In the HTTP snipplets, refer to the client as client.
250 * Revision 1.158 2007/11/11 16:44:17 fabiankeil
251 * Emit a log message when activating the MS IIS5 hack.
253 * Revision 1.157 2007/11/03 17:34:49 fabiankeil
254 * Log the "weak randomization factor" warning only
255 * once for mingw32 and provide some more details.
257 * Revision 1.156 2007/11/01 18:20:58 fabiankeil
258 * Initialize log module after initializing mutexes, future
259 * deadlocks in that code should now work cross-platform.
261 * Revision 1.155 2007/10/23 20:12:45 fabiankeil
262 * Fix first CSUCCEED line to end in \r\n as required by RFC1945.
263 * Reported by Bert van Leeuwen in BR#1818808.
265 * Revision 1.154 2007/10/19 17:00:08 fabiankeil
266 * Downgrade "Flushing header and buffers" message to LOG_LEVEL_INFO.
268 * Revision 1.153 2007/10/14 14:12:41 fabiankeil
269 * When in daemon mode, close stderr after the configuration file has been
270 * parsed the first time. If logfile isn't set, stop logging. Fixes BR#897436.
272 * Revision 1.152 2007/10/04 18:03:34 fabiankeil
273 * - Fix a crash when parsing invalid requests whose first header
274 * is rejected by get_header(). Regression (re?)introduced
275 * in r1.143 by yours truly.
276 * - Move ACTION_VANILLA_WAFER handling into parsers.c's
277 * client_cookie_adder() to make sure send-vanilla-wafer can be
278 * controlled through tags (and thus regression-tested).
280 * Revision 1.151 2007/09/29 10:21:16 fabiankeil
281 * - Move get_filter_function() from jcc.c to filters.c
282 * so the filter functions can be static.
283 * - Don't bother filtering body-less responses.
285 * Revision 1.150 2007/09/28 16:39:29 fabiankeil
286 * Execute content filters through execute_content_filter().
288 * Revision 1.149 2007/09/04 15:08:48 fabiankeil
289 * Initialize req to NULL to make sure it's defined if the
290 * first read_socket() call fails. Reported by icmp30.
292 * Revision 1.148 2007/08/26 16:47:13 fabiankeil
293 * Add Stephen Gildea's --pre-chroot-nslookup patch [#1276666],
294 * extensive comments moved to user manual.
296 * Revision 1.147 2007/08/25 14:42:40 fabiankeil
297 * Don't crash if a broken header filter wiped out the request line.
299 * Revision 1.146 2007/08/20 17:09:32 fabiankeil
300 * Fix byte_count calculation in case of flushes
301 * and don't parse the server headers a second time.
303 * Revision 1.145 2007/08/19 13:13:31 fabiankeil
304 * - If there's a connection problem after we already forwarded
305 * parts of the original content, just hang up. Fixes BR#1776724.
306 * - Fix warnings about unused code on mingw32.
307 * - In case of flushes, calculate the byte count
308 * less incorrectly (I think).
310 * Revision 1.144 2007/08/11 14:43:22 fabiankeil
311 * Add some more prototypes for static functions.
313 * Revision 1.143 2007/08/05 13:58:19 fabiankeil
314 * Comment out request_contains_null_bytes() until it's used again.
316 * Revision 1.142 2007/08/05 13:50:26 fabiankeil
317 * #1763173 from Stefan Huehner: s@const static@static const@
318 * and declare some more functions static.
320 * Revision 1.141 2007/08/04 09:56:23 fabiankeil
321 * - Log rejected CONNECT requests with LOG_LEVEL_INFO
322 * and explain why they were rejected in the first place.
323 * - Fix the LOG_LEVEL_CLF message for crunches of unallowed
324 * CONNECT requests. The request line was missing.
325 * - Add two more XXX reminders as we don't have enough already.
327 * Revision 1.140 2007/07/21 11:51:36 fabiankeil
328 * As Hal noticed, checking dispatch_cgi() as the last cruncher
329 * looks like a bug if CGI requests are blocked unintentionally,
330 * so don't do it unless the user enabled the new config option
331 * "allow-cgi-request-crunching".
333 * Revision 1.139 2007/07/14 07:46:41 fabiankeil
334 * - Allow to rewrite the request destination behind the client's back.
335 * - Turn the weird-looking unconditional for loop that
336 * reads the client request into a conditional while loop.
337 * Move the stuff that only runs once out of the loop.
338 * - Move parts of chat(), server_content_type() and the
339 * necessary stuff to fix BR#1750917 into get_filter_function().
341 * Revision 1.138 2007/06/03 18:45:18 fabiankeil
342 * Temporary workaround for BR#1730105.
344 * Revision 1.137 2007/06/01 18:16:36 fabiankeil
345 * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
346 * deadlocks and crashes on OpenBSD and possibly other OS with neither
347 * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
348 * Thanks to Ralf Horstmann for report and solution.
350 * Revision 1.136 2007/06/01 16:41:11 fabiankeil
351 * Add forward-override{} to change the forwarding settings through
352 * action sections. This is mainly interesting to forward different
353 * clients differently (for example based on User-Agent or request
356 * Revision 1.135 2007/05/24 17:03:50 fabiankeil
357 * - Let usage() mention the --chroot parameter.
358 * - Use read_socket() consistently and always leave
359 * the last buffer byte alone, even in cases where
360 * null termination (currently) doesn't matter.
362 * Revision 1.134 2007/05/16 14:59:46 fabiankeil
363 * - Fix config file loading on Unix if no config file is specified.
364 * Since r1.97 Privoxy would always interpret the last argument as
365 * config file, even if it's a valid command line option.
366 * - Abort in case of unrecognized command line options. Closes #1719696.
367 * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
368 * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
370 * Revision 1.133 2007/05/04 11:23:19 fabiankeil
371 * - Don't rerun crunchers that only depend on the request URL.
372 * - Don't count redirects and CGI requests as "blocked requests".
374 * Revision 1.132 2007/04/25 15:15:17 fabiankeil
375 * Support crunching based on tags created by server-header taggers.
377 * Revision 1.131 2007/04/22 13:24:50 fabiankeil
378 * Make HTTP snippets static (again). Add a Content-Type for those
379 * with content so the browser doesn't guess it based on the URL.
381 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
382 * Move crunching and request line rebuilding out of chat().
384 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
385 * Introduce tags as alternative way to specify which
386 * actions apply to a request. At the moment tags can be
387 * created based on client and server headers.
389 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
390 * Don't CLF-log CONNECT requests twice.
392 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
393 * Log the source address for ACL-related connection drops.
395 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
396 * New config option: enforce-blocks.
398 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
399 * - Move null byte check into separate function.
400 * - Don't confuse the client with error pages
401 * if a CONNECT request was already confirmed.
403 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
404 * Speed up NULL byte escaping and only log the complete
405 * NULL byte requests with header debugging enabled.
407 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
408 * Answer requests that contain NULL bytes with
409 * a custom response instead of waiting for more
410 * data until the client eventually hangs up.
412 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
413 * - Move delivery and logging of crunched responses
414 * from chat() into send_crunch_response().
415 * - Display the reason for generating http_responses.
416 * - Log the content length for LOG_LEVEL_CLF correctly
417 * (still incorrect for some fixed responses).
418 * - Reword an incorrect comment about
419 * treat-forbidden-connects-like-blocks violating
421 * - Add some log messages.
423 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
424 * Move mutex initialization into separate
425 * function and exit in case of errors.
427 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
428 * - Start to reduce chat()'s line count and move
429 * parts of it into separate functions.
430 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
432 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
433 * - Add Proxy-Agent header to HTTP snippets that are
434 * supposed to reach HTTP clients only.
435 * - Made a few CONNECT log messages more descriptive.
436 * - Catch completely empty server responses (as seen
437 * with Tor's fake ".noconnect" top level domain).
438 * - Use shiny new "forwarding-failed" template for socks errors.
440 * Revision 1.118 2007/01/07 07:43:43 joergs
441 * AmigaOS4 support added.
443 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
444 * Added config option accept-intercepted-requests
445 * and disabled it by default.
447 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
448 * Reverted parts of my last commit
449 * to keep error handling working.
451 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
452 * Fixed gcc43 conversion warnings.
454 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
455 * Fix -pedantic ISO C warning about converting
456 * from function pointer to object pointer.
458 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
459 * Silence compiler warning I introduced with my last commit.
461 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
462 * Mutex protect rand() if POSIX threading
463 * is used, warn the user if that's not possible
464 * and stop using it on _WIN32 where it could
467 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
468 * Don't prevent core dumps by catching SIGABRT.
469 * It's rude and makes debugging unreasonable painful.
471 * Revision 1.110 2006/12/13 14:52:53 etresoft
472 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
474 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
475 * Privoxy is now able to run as intercepting
476 * proxy in combination with any packet filter
477 * that does the port redirection. The destination
478 * is extracted from the "Host:" header which
479 * should be available for nearly all requests.
481 * Moved HTTP snipplets into jcc.c.
482 * Added error message for gopher proxy requests.
484 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
485 * Only unlink the pidfile if it's actually used.
487 * Change order of interception checks to make
488 * it possible to block or redirect requests for
491 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
492 * Make pthread mutex locking more generic. Instead of
493 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
494 * and use mutex locking unless there is an _r function
495 * available. Better safe than sorry.
497 * Fixes "./configure --disable-pthread" and should result
498 * in less threading-related problems on pthread-using platforms,
499 * but it still doesn't fix BR#1122404.
501 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
502 * Move pthread.h inclusion from jcc.c to jcc.h.
503 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
505 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
506 * Don't exit after receiving the second SIGHUP on Solaris.
508 * Fixes BR 1052235, but the same problem may exist on other
509 * systems. Once 3.0.6 is out we should use sigset()
510 * where available and see if it breaks anything.
512 * Revision 1.104 2006/09/23 13:26:38 roro
513 * Replace TABs by spaces in source code.
515 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
516 * Fix +redirect{}. Didn't work with -fast-redirects.
518 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
519 * Respond with 400 and a short text message
520 * if the client tries to use Privoxy as FTP proxy.
522 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
523 * Make number of retries in case of forwarded-connect problems
524 * a config file option (forwarded-connect-retries) and use 0 as
527 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
528 * Set random(3) seed.
530 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
531 * Follow the OpenBSD port's lead and protect the resolve
532 * functions on OpenBSD as well.
534 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
535 * --user fix. Only use the user as group if no group is specified.
536 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
538 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
539 * Windows service (re-)integration
543 * --install[:service_name]
544 * --uninstall[:service_name]
547 * They work as follows:
548 * --install will create a service for you and then terminate.
549 * By default the service name will be "privoxy" (without the quotes).
550 * However you can run multiple services if you wish, just by adding
551 * a colon and then a name (no spaces).
553 * --uninstall follows the exact same rules a --install.
555 * --service is used when the program is executed by the service
556 * control manager, and in normal circumstances would never be
557 * used as a command line argument.
559 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
560 * Windows service integration
562 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
563 * Incorporate Fabian Keil's patch work:
564 http://www.fabiankeil.de/sourcecode/privoxy/
566 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
567 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
568 * with what was really the latest development (the v_3_0_branch branch)
570 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
571 * Thanks to Jindrich Makovicka for a race condition fix for the log
572 * file. The race condition remains for non-pthread implementations.
573 * Reference patch #1175720.
575 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
576 * Add the ability to check jpeg images for invalid
577 * lengths of comment blocks. Defensive strategy
578 * against the exploit:
579 * Microsoft Security Bulletin MS04-028
580 * Buffer Overrun in JPEG Processing (GDI+) Could
581 * Allow Code Execution (833987)
582 * Enabled with +inspect-jpegs in actions files.
584 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
585 * - Fixed usage info for non-unix platforms
586 * - Fixed small cmdline parsing bug
588 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
589 * Diagnostics: Now preserve the returncode of pthread_create
590 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
592 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
593 * No longer ignore SIGCHLD. Fixes bug #769381
595 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
596 * Close jarfile on graceful exit, remove stray line
598 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
599 * Cosmetics: Killed a warning, a typo and an allocation left at exit
601 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
602 * No longer rely on non-POSIX.1 extensions of getcwd().
605 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
606 * Replaced setenv() by posix-compliant putenv()
607 * Thanks to Neil McCalden (nmcc AT users.sf.net).
609 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
610 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
612 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
613 * Clean-up and extension of improvements for forked mode:
614 * - Child's return code now consists of flags RC_FLAG_*
615 * - Reporting toggle to parent now properly #ifdef'ed
616 * - Children now report blocking to parent. This enables
617 * statistics in forked mode
619 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
620 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
621 * Children now report having been toggled through _exit(17), parents
622 * watch for that code and toggle themselves if found.
624 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
625 * Wrapping all *_r functions (the non-_r versions of them) with
626 * mutex semaphores for OSX. Hopefully this will take care of all
627 * of those pesky crash reports.
629 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
630 * Fixed two mostly harmless mem leaks
632 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
633 * Fix: Head of global clients list now initialized to NULL
635 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
636 * Added basic support for OPTIONS and TRACE HTTP methods:
637 * - New interceptor direct_response() added in chat().
638 * - sed() moved to earlier in the process, so that the
639 * Host: header is evaluated before actions and forwarding
642 * Revision 1.92 2002/05/08 16:00:46 oes
643 * Chat's buffer handling:
644 * - Fixed bug with unchecked out-of-mem conditions
645 * while reading client request & server headers
646 * - No longer predict if the buffer limit will be exceeded
647 * in the next read -- check add_to_iob's new
648 * return code. If buffer couldn't be extended
649 * (policy or out-of-mem) while
650 * - reading from client: abort
651 * - reading server headers: send error page
652 * - buffering server body for filter: flush,
653 * and if that fails: send error page
655 * Revision 1.91 2002/04/08 20:35:58 swa
658 * Revision 1.90 2002/04/02 14:57:28 oes
659 * Made sending wafers independent of FEATURE_COOKIE_JAR
661 * Revision 1.89 2002/03/31 17:18:59 jongfoster
662 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
664 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
665 * More compiler warning message maintenance
667 * Revision 1.87 2002/03/26 22:29:54 swa
668 * we have a new homepage!
670 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
671 * Workaround for closing the jarfile before load_config() comes around again
673 * Revision 1.85 2002/03/24 15:23:33 jongfoster
676 * Revision 1.84 2002/03/24 13:25:43 swa
677 * name change related issues
679 * Revision 1.83 2002/03/16 23:54:06 jongfoster
680 * Adding graceful termination feature, to help look for memory leaks.
681 * If you enable this (which, by design, has to be done by hand
682 * editing config.h) and then go to http://i.j.b/die, then the program
683 * will exit cleanly after the *next* request. It should free all the
684 * memory that was used.
686 * Revision 1.82 2002/03/13 00:27:05 jongfoster
689 * Revision 1.81 2002/03/12 01:42:50 oes
690 * Introduced modular filters
692 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
693 * OS/2 port maintenance:
694 * - Fixed EMX build - it had decayed a little
695 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
696 * substituted a memset for now.
698 * Revision 1.79 2002/03/09 20:03:52 jongfoster
699 * - Making various functions return int rather than size_t.
700 * (Undoing a recent change). Since size_t is unsigned on
701 * Windows, functions like read_socket that return -1 on
702 * error cannot return a size_t.
704 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
705 * crashes, and also frequently caused JB to jump to 100%
706 * CPU and stay there. (Because it thought it had just
707 * read ((unsigned)-1) == 4Gb of data...)
709 * - The signature of write_socket has changed, it now simply
710 * returns success=0/failure=nonzero.
712 * - Trying to get rid of a few warnings --with-debug on
713 * Windows, I've introduced a new type "jb_socket". This is
714 * used for the socket file descriptors. On Windows, this
715 * is SOCKET (a typedef for unsigned). Everywhere else, it's
716 * an int. The error value can't be -1 any more, so it's
717 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
718 * Windows it maps to the #define INVALID_SOCKET.)
720 * - The signature of bind_port has changed.
722 * Revision 1.78 2002/03/08 21:35:04 oes
723 * Added optional group supplement to --user option. Will now use default group of user if no group given
725 * Revision 1.77 2002/03/07 03:52:06 oes
726 * - Fixed compiler warnings etc
727 * - Improved handling of failed DNS lookups
729 * Revision 1.76 2002/03/06 22:54:35 jongfoster
730 * Automated function-comment nitpicking.
732 * Revision 1.75 2002/03/06 10:02:19 oes
733 * Fixed stupid bug when --user was not given
735 * Revision 1.74 2002/03/06 00:49:31 jongfoster
736 * Fixing warning on Windows
737 * Making #ifdefs that refer to the same variable consistently
738 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
740 * Revision 1.73 2002/03/05 23:57:30 hal9
741 * Stray character 's' on line 1618 was breaking build.
743 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
744 * - Re-enable OS/2 building after new parms were added
745 * - Fix false out of memory report when resolving CGI templates when no IP
746 * address is available of failed attempt (a la no such domain)
748 * Revision 1.71 2002/03/05 18:13:56 oes
749 * Added --user option
751 * Revision 1.70 2002/03/05 04:52:42 oes
752 * Deleted non-errlog debugging code
754 * Revision 1.69 2002/03/04 23:50:00 jongfoster
755 * Splitting off bind_port() call into bind_port_helper(), with
758 * Revision 1.68 2002/03/04 20:17:32 oes
761 * Revision 1.67 2002/03/04 18:18:57 oes
762 * - Removed _DEBUG mode
763 * - Cleand up cmdline parsing
764 * - Introduced --no-daemon, --pidfile options
765 * - Cleaned up signal handling:
766 * - Terminate cleanly on INT, TERM and ABRT
767 * - Schedule logfile for re-opening on HUP
768 * - Ignore CHLD and PIPE
769 * - Leave the rest with their default handlers
770 * - Uniform handler registration
771 * - Added usage() function
772 * - Played styleguide police
774 * Revision 1.66 2002/03/03 15:06:55 oes
775 * Re-enabled automatic config reloading
777 * Revision 1.65 2002/03/03 14:49:11 oes
778 * Fixed CLF logging: Now uses client's original HTTP request
780 * Revision 1.64 2002/03/03 09:18:03 joergs
781 * Made jumbjuster work on AmigaOS again.
783 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
784 * Clean up a little CRLF unpleasantness that suddenly appeared
786 * Revision 1.62 2002/02/20 23:17:23 jongfoster
787 * Detecting some out-of memory conditions and exiting with a log message.
789 * Revision 1.61 2002/01/17 21:01:52 jongfoster
790 * Moving all our URL and URL pattern parsing code to urlmatch.c.
792 * Revision 1.60 2001/12/30 14:07:32 steudten
793 * - Add signal handling (unix)
794 * - Add SIGHUP handler (unix)
795 * - Add creation of pidfile (unix)
796 * - Add action 'top' in rc file (RH)
797 * - Add entry 'SIGNALS' to manpage
798 * - Add exit message to logfile (unix)
800 * Revision 1.59 2001/12/13 14:07:18 oes
801 * Fixed Bug: 503 error page now sent OK
803 * Revision 1.58 2001/11/30 23:37:24 jongfoster
804 * Renaming the Win32 config file to config.txt - this is almost the
805 * same as the corresponding UNIX name "config"
807 * Revision 1.57 2001/11/16 00:47:43 jongfoster
808 * Changing the tty-disconnection code to use setsid().
810 * Revision 1.56 2001/11/13 20:20:54 jongfoster
811 * Tabs->spaces, fixing a bug with missing {} around an if()
813 * Revision 1.55 2001/11/13 20:14:53 jongfoster
814 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
816 * Revision 1.54 2001/11/07 00:03:14 steudten
817 * Give reliable return value if an error
818 * occurs not just 0 with new daemon mode.
820 * Revision 1.53 2001/11/05 21:41:43 steudten
821 * Add changes to be a real daemon just for unix os.
822 * (change cwd to /, detach from controlling tty, set
823 * process group and session leader to the own process.
825 * Add some fatal-error log message for failed malloc().
826 * Add '-d' if compiled with 'configure --with-debug' to
827 * enable debug output.
829 * Revision 1.52 2001/10/26 20:11:20 jongfoster
830 * Fixing type mismatch
832 * Revision 1.51 2001/10/26 17:38:28 oes
835 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
836 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
837 * threads to call select() simultaneously. So, it's time to do a real, live,
838 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
839 * (native). Both versions will work, but using __OS2__ offers multi-threading.
841 * Revision 1.49 2001/10/23 21:41:35 jongfoster
842 * Added call to initialize the (statically-allocated of course)
843 * "out of memory" CGI response.
845 * Revision 1.48 2001/10/10 19:56:46 jongfoster
846 * Moving some code that wasn't cookie-related out of an #ifdef
849 * Revision 1.47 2001/10/10 16:44:36 oes
850 * Added CONNECT destination port limitation check
852 * Revision 1.46 2001/10/08 15:17:41 oes
853 * Re-enabled SSL forwarding
855 * Revision 1.45 2001/10/07 15:42:11 oes
856 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
858 * Moved downgrading of the HTTP version from parse_http_request to
859 * chat(), since we can't decide if it is necessary before we have
860 * determined the actions for the URL. The HTTP command is now
861 * *always* re-built so the repairs need no longer be special-cased.
863 * filter_popups now gets a csp pointer so it can raise the new
864 * CSP_FLAG_MODIFIED flag.
868 * Added configurable size limit for the IOB. If the IOB grows so
869 * large that the next read would exceed the limit, the header
870 * is generated, and the header & unfiltered buffer are flushed
871 * to the client. Chat then continues in non-buffering,
872 * non-filtering body mode.
874 * Revision 1.44 2001/10/02 18:13:57 oes
877 * Revision 1.43 2001/10/02 15:32:13 oes
878 * Moved generation of hdr
880 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
881 * Cleaning up 2 compiler warnings on OS/2.
883 * Revision 1.41 2001/09/16 17:05:14 jongfoster
884 * Removing unused #include showarg.h
886 * Revision 1.40 2001/09/16 15:41:45 jongfoster
887 * Fixing signed/unsigned comparison warning.
889 * Revision 1.39 2001/09/16 13:21:27 jongfoster
890 * Changes to use new list functions.
892 * Revision 1.38 2001/09/16 13:01:46 jongfoster
893 * Removing redundant function call that zeroed zalloc()'d memory.
895 * Revision 1.37 2001/09/10 11:12:24 oes
896 * Deleted unused variable
898 * Revision 1.36 2001/09/10 10:56:15 oes
899 * Silenced compiler warnings
901 * Revision 1.35 2001/07/31 14:44:22 oes
902 * Deleted unused size parameter from filter_popups()
904 * Revision 1.34 2001/07/30 22:08:36 jongfoster
905 * Tidying up #defines:
906 * - All feature #defines are now of the form FEATURE_xxx
907 * - Permanently turned off WIN_GUI_EDIT
908 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
910 * Revision 1.33 2001/07/29 19:32:00 jongfoster
911 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
913 * Revision 1.32 2001/07/29 18:47:05 jongfoster
914 * Adding missing #include "loadcfg.h"
916 * Revision 1.31 2001/07/29 12:17:48 oes
917 * Applied pthread fix by Paul Lieverse
919 * Revision 1.30 2001/07/25 22:57:13 jongfoster
920 * __BEOS__ no longer overrides FEATURE_PTHREAD.
921 * This is because FEATURE_PTHREAD will soon be widely used, so I
922 * want to keep it simple.
924 * Revision 1.29 2001/07/24 12:47:06 oes
925 * Applied BeOS support update by Eugenia
927 * Revision 1.28 2001/07/23 13:26:12 oes
928 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
930 * Revision 1.27 2001/07/19 19:09:47 haroon
931 * - Added code to take care of the situation where while processing the first
932 * server response (which includes the server header), after finding the end
933 * of the headers we were not looking past the end of the headers for
934 * content modification. I enabled it for filter_popups.
935 * Someone else should look to see if other similar operations should be
936 * done to the discarded portion of the buffer.
938 * Note 2001/07/20: No, the other content modification mechanisms will process
939 * the whole iob later anyway. --oes
941 * Revision 1.26 2001/07/18 12:31:36 oes
944 * Revision 1.25 2001/07/15 19:43:49 jongfoster
945 * Supports POSIX threads.
946 * Also removed some unused #includes.
948 * Revision 1.24 2001/07/13 14:00:40 oes
949 * - Generic content modification scheme:
950 * Each feature has its own applicability flag that is set
951 * from csp->action->flags.
952 * Replaced the "filtering" int flag , by a function pointer
953 * "content_filter" to the function that will do the content
954 * modification. If it is != NULL, the document will be buffered
955 * and processed through *content_filter, which must set
956 * csp->content_length and return a modified copy of the body
957 * or return NULL (on failiure).
958 * - Changed csp->is_text to the more generic bitmap csp->content_type
959 * which can currently take the valued CT_TEXT or CT_GIF
961 * - Removed all #ifdef PCRS
963 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
964 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
965 * the `block_acl' call. This prevents a compilation error when the user
966 * does not wish to use the "ACL" feature.
968 * Revision 1.22 2001/06/29 21:45:41 oes
969 * Indentation, CRLF->LF, Tab-> Space
971 * Revision 1.21 2001/06/29 13:29:36 oes
972 * - Cleaned up, improved comments
973 * - Unified all possible interceptors (CGI,
974 * block, trust, fast_redirect) in one
975 * place, with one (CGI) answer generation
976 * mechansim. Much clearer now.
977 * - Removed the GIF image generation, which
978 * is now done in filters.c:block_url()
979 * - Made error conditions like domain lookup
980 * failiure or (various) problems while talking
981 * to the server use cgi.c:error_response()
982 * instead of generating HTML/HTTP in chat() (yuck!)
983 * - Removed logentry from cancelled commit
985 * Revision 1.20 2001/06/09 10:55:28 jongfoster
986 * Changing BUFSIZ ==> BUFFER_SIZE
988 * Revision 1.19 2001/06/07 23:12:52 jongfoster
989 * Replacing function pointer in struct gateway with a directly
990 * called function forwarded_connect().
991 * Replacing struct gateway with struct forward_spec
993 * Revision 1.18 2001/06/03 19:12:16 oes
994 * introduced new cgi handling
996 * Revision 1.17 2001/06/01 20:07:23 jongfoster
997 * Now uses action +image-blocker{} rather than config->tinygif
999 * Revision 1.16 2001/06/01 18:49:17 jongfoster
1000 * Replaced "list_share" with "list" - the tiny memory gain was not
1001 * worth the extra complexity.
1003 * Revision 1.15 2001/05/31 21:24:47 jongfoster
1004 * Changed "permission" to "action" throughout.
1005 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
1006 * Moved vanilla wafer check into chat(), since we must now
1007 * decide whether or not to add it based on the URL.
1009 * Revision 1.14 2001/05/29 20:14:01 joergs
1010 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
1013 * Revision 1.13 2001/05/29 09:50:24 jongfoster
1014 * Unified blocklist/imagelist/permissionslist.
1015 * File format is still under discussion, but the internal changes
1016 * are (mostly) done.
1018 * Also modified interceptor behaviour:
1019 * - We now intercept all URLs beginning with one of the following
1020 * prefixes (and *only* these prefixes):
1022 * * http://ijbswa.sf.net/config/
1023 * * http://ijbswa.sourceforge.net/config/
1024 * - New interceptors "home page" - go to http://i.j.b/ to see it.
1025 * - Internal changes so that intercepted and fast redirect pages
1026 * are not replaced with an image.
1027 * - Interceptors now have the option to send a binary page direct
1028 * to the client. (i.e. ijb-send-banner uses this)
1029 * - Implemented show-url-info interceptor. (Which is why I needed
1030 * the above interceptors changes - a typical URL is
1031 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
1032 * The previous mechanism would not have intercepted that, and
1033 * if it had been intercepted then it then it would have replaced
1034 * it with an image.)
1036 * Revision 1.12 2001/05/27 22:17:04 oes
1038 * - re_process_buffer no longer writes the modified buffer
1039 * to the client, which was very ugly. It now returns the
1040 * buffer, which it is then written by chat.
1042 * - content_length now adjusts the Content-Length: header
1043 * for modified documents rather than crunch()ing it.
1044 * (Length info in csp->content_length, which is 0 for
1045 * unmodified documents)
1047 * - For this to work, sed() is called twice when filtering.
1049 * Revision 1.11 2001/05/26 17:27:53 jongfoster
1050 * Added support for CLF and fixed LOG_LEVEL_LOG.
1051 * Also did CRLF->LF fix of my previous patch.
1053 * Revision 1.10 2001/05/26 15:26:15 jongfoster
1054 * ACL feature now provides more security by immediately dropping
1055 * connections from untrusted hosts.
1057 * Revision 1.9 2001/05/26 00:28:36 jongfoster
1058 * Automatic reloading of config file.
1059 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
1060 * Most of the global variables have been moved to a new
1061 * struct configuration_spec, accessed through csp->config->globalname
1062 * Most of the globals remaining are used by the Win32 GUI.
1064 * Revision 1.8 2001/05/25 22:43:18 jongfoster
1065 * Fixing minor memory leak and buffer overflow.
1067 * Revision 1.7 2001/05/25 22:34:30 jongfoster
1070 * Revision 1.6 2001/05/23 00:13:58 joergs
1071 * AmigaOS support fixed.
1073 * Revision 1.5 2001/05/22 18:46:04 oes
1075 * - Enabled filtering banners by size rather than URL
1076 * by adding patterns that replace all standard banner
1077 * sizes with the "Junkbuster" gif to the re_filterfile
1079 * - Enabled filtering WebBugs by providing a pattern
1080 * which kills all 1x1 images
1082 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
1083 * which is selected by the (nonstandard and therefore
1084 * capital) letter 'U' in the option string.
1085 * It causes the quantifiers to be ungreedy by default.
1086 * Appending a ? turns back to greedy (!).
1088 * - Added a new interceptor ijb-send-banner, which
1089 * sends back the "Junkbuster" gif. Without imagelist or
1090 * MSIE detection support, or if tinygif = 1, or the
1091 * URL isn't recognized as an imageurl, a lame HTML
1092 * explanation is sent instead.
1094 * - Added new feature, which permits blocking remote
1095 * script redirects and firing back a local redirect
1097 * The feature is conditionally compiled, i.e. it
1098 * can be disabled with --disable-fast-redirects,
1099 * plus it must be activated by a "fast-redirects"
1100 * line in the config file, has its own log level
1101 * and of course wants to be displayed by show-proxy-args
1102 * Note: Boy, all the #ifdefs in 1001 locations and
1103 * all the fumbling with configure.in and acconfig.h
1104 * were *way* more work than the feature itself :-(
1106 * - Because a generic redirect template was needed for
1107 * this, tinygif = 3 now uses the same.
1109 * - Moved GIFs, and other static HTTP response templates
1112 * - Some minor fixes
1114 * - Removed some >400 CRs again (Jon, you really worked
1117 * Revision 1.4 2001/05/21 19:34:01 jongfoster
1118 * Made failure to bind() a fatal error.
1120 * Revision 1.3 2001/05/20 01:21:20 jongfoster
1121 * Version 2.9.4 checkin.
1122 * - Merged popupfile and cookiefile, and added control over PCRS
1123 * filtering, in new "permissionsfile".
1124 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
1125 * file error you now get a message box (in the Win32 GUI) rather
1126 * than the program exiting with no explanation.
1127 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
1129 * - Removed tabs from "config"
1130 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
1131 * - Bumped up version number.
1133 * Revision 1.2 2001/05/17 22:34:44 oes
1134 * - Added hint on GIF char array generation to jcc.c
1135 * - Cleaned CRLF's from the sources and related files
1136 * - Repaired logging for REF and FRC
1138 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
1139 * Initial import of version 2.9.3 source tree
1142 *********************************************************************/
1148 #include <sys/types.h>
1157 # ifndef FEATURE_PTHREAD
1161 # include <windows.h>
1162 # include <process.h>
1163 # endif /* ndef FEATURE_PTHREAD */
1166 # ifndef _WIN_CONSOLE
1167 # include "w32log.h"
1168 # endif /* ndef _WIN_CONSOLE */
1169 # include "w32svrapi.h"
1171 #else /* ifndef _WIN32 */
1173 # if !defined (__OS2__)
1174 # include <unistd.h>
1175 # include <sys/wait.h>
1176 # endif /* ndef __OS2__ */
1177 # include <sys/time.h>
1178 # include <sys/stat.h>
1179 # include <sys/ioctl.h>
1182 #include <sys/termios.h>
1190 # include <signal.h>
1193 # include <socket.h> /* BeOS has select() for sockets only. */
1194 # include <OS.h> /* declarations for threads and stuff. */
1197 # if defined(__EMX__) || defined(__OS2__)
1198 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
1203 #define bzero(B,N) memset(B,0x00,n)
1207 # include <select.h>
1212 #include "project.h"
1215 #include "filters.h"
1216 #include "loaders.h"
1217 #include "parsers.h"
1218 #include "miscutil.h"
1220 #include "jbsockets.h"
1221 #include "gateway.h"
1222 #include "actions.h"
1224 #include "loadcfg.h"
1225 #include "urlmatch.h"
1227 const char jcc_h_rcs[] = JCC_H_VERSION;
1228 const char project_h_rcs[] = PROJECT_H_VERSION;
1231 struct client_state clients[1];
1232 struct file_list files[1];
1234 #ifdef FEATURE_STATISTICS
1235 int urls_read = 0; /* total nr of urls read inc rejected */
1236 int urls_rejected = 0; /* total nr of urls rejected */
1237 #endif /* def FEATURE_STATISTICS */
1239 #ifdef FEATURE_GRACEFUL_TERMINATION
1240 int g_terminate = 0;
1243 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1244 static void sig_handler(int the_signal);
1246 static int client_protocol_is_unsupported(const struct client_state *csp, char *req);
1247 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
1248 static jb_err get_server_headers(struct client_state *csp);
1249 static const char *crunch_reason(const struct http_response *rsp);
1250 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp);
1251 static char *get_request_line(struct client_state *csp);
1252 static jb_err receive_client_request(struct client_state *csp);
1253 static jb_err parse_client_request(struct client_state *csp);
1254 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
1255 static jb_err change_request_destination(struct client_state *csp);
1256 static void chat(struct client_state *csp);
1257 static void serve(struct client_state *csp);
1258 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1259 static void usage(const char *myname);
1261 static void initialize_mutexes(void);
1262 static jb_socket bind_port_helper(struct configuration_spec *config);
1263 static void listen_loop(void);
1266 void serve(struct client_state *csp);
1267 #else /* ifndef AMIGA */
1268 static void serve(struct client_state *csp);
1269 #endif /* def AMIGA */
1272 static int32 server_thread(void *data);
1273 #endif /* def __BEOS__ */
1276 #define sleep(N) Sleep(((N) * 1000))
1280 #define sleep(N) DosSleep(((N) * 100))
1283 #ifdef MUTEX_LOCKS_AVAILABLE
1285 * XXX: Does the locking stuff really belong in this file?
1287 privoxy_mutex_t log_mutex;
1288 privoxy_mutex_t log_init_mutex;
1289 privoxy_mutex_t connection_reuse_mutex;
1291 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
1292 privoxy_mutex_t resolver_mutex;
1293 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
1295 #ifndef HAVE_GMTIME_R
1296 privoxy_mutex_t gmtime_mutex;
1297 #endif /* ndef HAVE_GMTIME_R */
1299 #ifndef HAVE_LOCALTIME_R
1300 privoxy_mutex_t localtime_mutex;
1301 #endif /* ndef HAVE_GMTIME_R */
1304 privoxy_mutex_t rand_mutex;
1305 #endif /* ndef HAVE_RANDOM */
1307 #endif /* def MUTEX_LOCKS_AVAILABLE */
1310 const char *basedir = NULL;
1311 const char *pidfile = NULL;
1312 static int received_hup_signal = 0;
1313 #endif /* defined unix */
1315 /* HTTP snipplets. */
1316 static const char CSUCCEED[] =
1317 "HTTP/1.0 200 Connection established\r\n"
1318 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
1320 static const char CHEADER[] =
1321 "HTTP/1.0 400 Invalid header received from client\r\n"
1322 "Proxy-Agent: Privoxy " VERSION "\r\n"
1323 "Content-Type: text/plain\r\n"
1324 "Connection: close\r\n\r\n"
1325 "Invalid header received from client.\r\n";
1327 static const char FTP_RESPONSE[] =
1328 "HTTP/1.0 400 Invalid request received from client\r\n"
1329 "Content-Type: text/plain\r\n"
1330 "Connection: close\r\n\r\n"
1331 "Invalid request. Privoxy doesn't support FTP.\r\n";
1333 static const char GOPHER_RESPONSE[] =
1334 "HTTP/1.0 400 Invalid request received from client\r\n"
1335 "Content-Type: text/plain\r\n"
1336 "Connection: close\r\n\r\n"
1337 "Invalid request. Privoxy doesn't support gopher.\r\n";
1339 /* XXX: should be a template */
1340 static const char MISSING_DESTINATION_RESPONSE[] =
1341 "HTTP/1.0 400 Bad request received from client\r\n"
1342 "Proxy-Agent: Privoxy " VERSION "\r\n"
1343 "Content-Type: text/plain\r\n"
1344 "Connection: close\r\n\r\n"
1345 "Bad request. Privoxy was unable to extract the destination.\r\n";
1347 /* XXX: should be a template */
1348 static const char NO_SERVER_DATA_RESPONSE[] =
1349 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1350 "Proxy-Agent: Privoxy " VERSION "\r\n"
1351 "Content-Type: text/plain\r\n"
1352 "Connection: close\r\n\r\n"
1353 "Empty server or forwarder response.\r\n"
1354 "The connection has been closed but Privoxy didn't receive any data.\r\n";
1356 /* XXX: should be a template */
1357 static const char INVALID_SERVER_HEADERS_RESPONSE[] =
1358 "HTTP/1.0 502 Server or forwarder response invalid\r\n"
1359 "Proxy-Agent: Privoxy " VERSION "\r\n"
1360 "Content-Type: text/plain\r\n"
1361 "Connection: close\r\n\r\n"
1362 "Bad response. The server or forwarder response doesn't look like HTTP.\r\n";
1365 /* XXX: should be a template */
1366 static const char NULL_BYTE_RESPONSE[] =
1367 "HTTP/1.0 400 Bad request received from client\r\n"
1368 "Proxy-Agent: Privoxy " VERSION "\r\n"
1369 "Content-Type: text/plain\r\n"
1370 "Connection: close\r\n\r\n"
1371 "Bad request. Null byte(s) before end of request.\r\n";
1374 /* XXX: should be a template */
1375 static const char MESSED_UP_REQUEST_RESPONSE[] =
1376 "HTTP/1.0 400 Malformed request after rewriting\r\n"
1377 "Proxy-Agent: Privoxy " VERSION "\r\n"
1378 "Content-Type: text/plain\r\n"
1379 "Connection: close\r\n\r\n"
1380 "Bad request. Messed up with header filters.\r\n";
1382 /* A function to crunch a response */
1383 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
1385 /* Crunch function flags */
1386 #define CF_NO_FLAGS 0
1387 /* Cruncher applies to forced requests as well */
1388 #define CF_IGNORE_FORCE 1
1389 /* Crunched requests are counted for the block statistics */
1390 #define CF_COUNT_AS_REJECT 2
1392 /* A crunch function and its flags */
1395 const crunch_func_ptr cruncher;
1399 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
1401 /* Complete list of cruncher functions */
1402 static const struct cruncher crunchers_all[] = {
1403 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
1404 { block_url, CF_COUNT_AS_REJECT },
1405 #ifdef FEATURE_TRUST
1406 { trust_url, CF_COUNT_AS_REJECT },
1407 #endif /* def FEATURE_TRUST */
1408 { redirect_url, CF_NO_FLAGS },
1409 { dispatch_cgi, CF_IGNORE_FORCE},
1413 /* Light version, used after tags are applied */
1414 static const struct cruncher crunchers_light[] = {
1415 { block_url, CF_COUNT_AS_REJECT },
1416 { redirect_url, CF_NO_FLAGS },
1422 * XXX: Don't we really mean
1428 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1429 /*********************************************************************
1431 * Function : sig_handler
1433 * Description : Signal handler for different signals.
1434 * Exit gracefully on TERM and INT
1435 * or set a flag that will cause the errlog
1436 * to be reopened by the main thread on HUP.
1439 * 1 : the_signal = the signal cause this function to call
1443 *********************************************************************/
1444 static void sig_handler(int the_signal)
1450 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1462 received_hup_signal = 1;
1468 * We shouldn't be here, unless we catch signals
1469 * in main() that we can't handle here!
1471 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1479 /*********************************************************************
1481 * Function : client_protocol_is_unsupported
1483 * Description : Checks if the client used a known unsupported
1484 * protocol and deals with it by sending an error
1488 * 1 : csp = Current client state (buffers, headers, etc...)
1489 * 2 : req = the first request line send by the client
1491 * Returns : TRUE if an error response has been generated, or
1492 * FALSE if the request doesn't look invalid.
1494 *********************************************************************/
1495 static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1498 * If it's a FTP or gopher request, we don't support it.
1500 * These checks are better than nothing, but they might
1501 * not work in all configurations and some clients might
1502 * have problems digesting the answer.
1504 * They should, however, never cause more problems than
1505 * Privoxy's old behaviour (returning the misleading HTML
1508 * "Could not resolve http://(ftp|gopher)://example.org").
1510 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1512 const char *response = NULL;
1513 const char *protocol = NULL;
1515 if (!strncmpic(req, "GET ftp://", 10))
1517 response = FTP_RESPONSE;
1522 response = GOPHER_RESPONSE;
1523 protocol = "GOPHER";
1525 log_error(LOG_LEVEL_ERROR,
1526 "%s tried to use Privoxy as %s proxy: %s",
1527 csp->ip_addr_str, protocol, req);
1528 log_error(LOG_LEVEL_CLF,
1529 "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1531 write_socket(csp->cfd, response, strlen(response));
1540 /*********************************************************************
1542 * Function : get_request_destination_elsewhere
1544 * Description : If the client's request was redirected into
1545 * Privoxy without the client's knowledge,
1546 * the request line lacks the destination host.
1548 * This function tries to get it elsewhere,
1549 * provided accept-intercepted-requests is enabled.
1551 * "Elsewhere" currently only means "Host: header",
1552 * but in the future we may ask the redirecting
1553 * packet filter to look the destination up.
1555 * If the destination stays unknown, an error
1556 * response is send to the client and headers
1557 * are freed so that chat() can return directly.
1560 * 1 : csp = Current client state (buffers, headers, etc...)
1561 * 2 : headers = a header list
1563 * Returns : JB_ERR_OK if the destination is now known, or
1564 * JB_ERR_PARSE if it isn't.
1566 *********************************************************************/
1567 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1571 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1573 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1574 " Privoxy isn't configured to accept intercepted requests.",
1575 csp->ip_addr_str, csp->http->cmd);
1576 /* XXX: Use correct size */
1577 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1578 csp->ip_addr_str, csp->http->cmd);
1580 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1581 destroy_list(headers);
1583 return JB_ERR_PARSE;
1585 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1587 /* Split the domain we just got for pattern matching */
1588 init_domain_components(csp->http);
1594 /* We can't work without destination. Go spread the news.*/
1596 req = list_to_text(headers);
1598 /* XXX: Use correct size */
1599 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1600 csp->ip_addr_str, csp->http->cmd);
1601 log_error(LOG_LEVEL_ERROR,
1602 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1603 csp->ip_addr_str, csp->http->cmd, req);
1606 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
1607 destroy_list(headers);
1609 return JB_ERR_PARSE;
1612 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1613 * to get the destination IP address, use it as host directly
1614 * or do a reverse DNS lookup first.
1619 /*********************************************************************
1621 * Function : get_server_headers
1623 * Description : Parses server headers in iob and fills them
1624 * into csp->headers so that they can later be
1628 * 1 : csp = Current client state (buffers, headers, etc...)
1630 * Returns : JB_ERR_OK if everything went fine, or
1631 * JB_ERR_PARSE if the headers were incomplete.
1633 *********************************************************************/
1634 static jb_err get_server_headers(struct client_state *csp)
1636 int continue_hack_in_da_house = 0;
1639 while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
1644 * continue hack in da house. Ignore the ending of
1645 * this head and continue enlisting header lines.
1646 * The reason is described below.
1648 enlist(csp->headers, "");
1649 continue_hack_in_da_house = 0;
1652 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1655 * It's a bodyless continue response, don't
1656 * stop header parsing after reaching its end.
1658 * As a result Privoxy will concatenate the
1659 * next response's head and parse and deliver
1660 * the headers as if they belonged to one request.
1662 * The client will separate them because of the
1663 * empty line between them.
1665 * XXX: What we're doing here is clearly against
1666 * the intended purpose of the continue header,
1667 * and under some conditions (HTTP/1.0 client request)
1668 * it's a standard violation.
1670 * Anyway, "sort of against the spec" is preferable
1671 * to "always getting confused by Continue responses"
1672 * (Privoxy's behaviour before this hack was added)
1674 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1675 continue_hack_in_da_house = 1;
1677 else if (*header == '\0')
1680 * If the header is empty, but the Continue hack
1681 * isn't active, we can assume that we reached the
1682 * end of the buffer before we hit the end of the
1685 * Inform the caller an let it decide how to handle it.
1687 return JB_ERR_PARSE;
1690 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1693 * XXX: Should we quit the request and return a
1694 * out of memory error page instead?
1696 log_error(LOG_LEVEL_ERROR,
1697 "Out of memory while enlisting server headers. %s lost.",
1707 /*********************************************************************
1709 * Function : crunch_reason
1711 * Description : Translates the crunch reason code into a string.
1714 * 1 : rsp = a http_response
1716 * Returns : A string with the crunch reason or an error description.
1718 *********************************************************************/
1719 static const char *crunch_reason(const struct http_response *rsp)
1721 char * reason = NULL;
1723 assert(rsp != NULL);
1726 return "Internal error while searching for crunch reason";
1729 switch (rsp->reason)
1731 case RSP_REASON_UNSUPPORTED:
1732 reason = "Unsupported HTTP feature";
1734 case RSP_REASON_BLOCKED:
1737 case RSP_REASON_UNTRUSTED:
1738 reason = "Untrusted";
1740 case RSP_REASON_REDIRECTED:
1741 reason = "Redirected";
1743 case RSP_REASON_CGI_CALL:
1744 reason = "CGI Call";
1746 case RSP_REASON_NO_SUCH_DOMAIN:
1747 reason = "DNS failure";
1749 case RSP_REASON_FORWARDING_FAILED:
1750 reason = "Forwarding failed";
1752 case RSP_REASON_CONNECT_FAILED:
1753 reason = "Connection failure";
1755 case RSP_REASON_OUT_OF_MEMORY:
1756 reason = "Out of memory (may mask other reasons)";
1759 reason = "No reason recorded";
1767 /*********************************************************************
1769 * Function : send_crunch_response
1771 * Description : Delivers already prepared response for
1772 * intercepted requests, logs the interception
1773 * and frees the response.
1776 * 1 : csp = Current client state (buffers, headers, etc...)
1777 * 1 : rsp = Fully prepared response. Will be freed on exit.
1779 * Returns : Nothing.
1781 *********************************************************************/
1782 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp)
1784 const struct http_request *http = csp->http;
1785 char status_code[4];
1787 assert(rsp != NULL);
1788 assert(rsp->head != NULL);
1793 * Not supposed to happen. If it does
1794 * anyway, treat it as an unknown error.
1796 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1797 /* return code doesn't matter */
1802 /* If rsp is still NULL, we have serious internal problems. */
1803 log_error(LOG_LEVEL_FATAL,
1804 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1808 * Extract the status code from the actual head
1809 * that was send to the client. It is the only
1810 * way to get it right for all requests, including
1811 * the fixed ones for out-of-memory problems.
1813 * A head starts like this: 'HTTP/1.1 200...'
1817 status_code[0] = rsp->head[9];
1818 status_code[1] = rsp->head[10];
1819 status_code[2] = rsp->head[11];
1820 status_code[3] = '\0';
1822 /* Write the answer to the client */
1823 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1824 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1826 /* There is nothing we can do about it. */
1827 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1830 /* Log that the request was crunched and why. */
1831 log_error(LOG_LEVEL_CRUNCH, "%s: %s", crunch_reason(rsp), http->url);
1832 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %d",
1833 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1835 /* Clean up and return */
1836 if (cgi_error_memory() != rsp)
1838 free_http_response(rsp);
1845 /*********************************************************************
1847 * Function : request_contains_null_bytes
1849 * Description : Checks for NULL bytes in the request and sends
1850 * an error message to the client if any were found.
1852 * XXX: currently not used, see comment in chat().
1855 * 1 : csp = Current client state (buffers, headers, etc...)
1856 * 2 : buf = Data from the client's request to check.
1857 * 3 : len = The data length.
1859 * Returns : TRUE if the request contained one or more NULL bytes, or
1862 *********************************************************************/
1863 static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1865 size_t c_len; /* Request lenght when treated as C string */
1867 c_len = strlen(buf);
1872 * Null byte(s) found. Log the request,
1873 * return an error response and hang up.
1875 size_t tmp_len = c_len;
1880 * Replace NULL byte(s) with '°' characters
1881 * so the request can be logged as string.
1882 * XXX: Is there a better replacement character?
1885 tmp_len += strlen(buf+tmp_len);
1886 } while (tmp_len < len);
1888 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1889 "(length=%d, strlen=%d).", csp->ip_addr_str, len, c_len);
1890 log_error(LOG_LEVEL_HEADER,
1891 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1893 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
1895 /* XXX: Log correct size */
1896 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1906 /*********************************************************************
1908 * Function : crunch_response_triggered
1910 * Description : Checks if the request has to be crunched,
1911 * and delivers the crunch response if necessary.
1914 * 1 : csp = Current client state (buffers, headers, etc...)
1915 * 2 : crunchers = list of cruncher functions to run
1917 * Returns : TRUE if the request was answered with a crunch response
1920 *********************************************************************/
1921 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
1923 struct http_response *rsp = NULL;
1924 const struct cruncher *c;
1927 * If CGI request crunching is disabled,
1928 * check the CGI dispatcher out of order to
1929 * prevent unintentional blocks or redirects.
1931 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
1932 && (NULL != (rsp = dispatch_cgi(csp))))
1934 /* Deliver, log and free the interception response. */
1935 send_crunch_response(csp, rsp);
1939 for (c = crunchers; c->cruncher != NULL; c++)
1942 * Check the cruncher if either Privoxy is toggled
1943 * on and the request isn't forced, or if the cruncher
1944 * applies to forced requests as well.
1946 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
1947 !(csp->flags & CSP_FLAG_FORCED)) ||
1948 (c->flags & CF_IGNORE_FORCE))
1950 rsp = c->cruncher(csp);
1953 /* Deliver, log and free the interception response. */
1954 send_crunch_response(csp, rsp);
1955 #ifdef FEATURE_STATISTICS
1956 if (c->flags & CF_COUNT_AS_REJECT)
1958 csp->flags |= CSP_FLAG_REJECTED;
1960 #endif /* def FEATURE_STATISTICS */
1971 /*********************************************************************
1973 * Function : build_request_line
1975 * Description : Builds the HTTP request line.
1977 * If a HTTP forwarder is used it expects the whole URL,
1978 * web servers only get the path.
1981 * 1 : csp = Current client state (buffers, headers, etc...)
1982 * 2 : fwd = The forwarding spec used for the request
1983 * XXX: Should use http->fwd instead.
1984 * 3 : request_line = The old request line which will be replaced.
1986 * Returns : Nothing. Terminates in case of memory problems.
1988 *********************************************************************/
1989 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
1991 struct http_request *http = csp->http;
1993 assert(http->ssl == 0);
1996 * Downgrade http version from 1.1 to 1.0
1997 * if +downgrade action applies.
1999 if ( (csp->action->flags & ACTION_DOWNGRADE)
2000 && (!strcmpic(http->ver, "HTTP/1.1")))
2003 http->ver = strdup("HTTP/1.0");
2005 if (http->ver == NULL)
2007 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
2012 * Rebuild the request line.
2014 freez(*request_line);
2015 *request_line = strdup(http->gpc);
2016 string_append(request_line, " ");
2018 if (fwd->forward_host)
2020 string_append(request_line, http->url);
2024 string_append(request_line, http->path);
2026 string_append(request_line, " ");
2027 string_append(request_line, http->ver);
2029 if (*request_line == NULL)
2031 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
2033 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
2037 /*********************************************************************
2039 * Function : change_request_destination
2041 * Description : Parse a (rewritten) request line and regenerate
2042 * the http request data.
2045 * 1 : csp = Current client state (buffers, headers, etc...)
2047 * Returns : Forwards the parse_http_request() return code.
2048 * Terminates in case of memory problems.
2050 *********************************************************************/
2051 static jb_err change_request_destination(struct client_state *csp)
2053 struct http_request *http = csp->http;
2056 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
2057 free_http_request(http);
2058 err = parse_http_request(csp->headers->first->str, http, csp);
2059 if (JB_ERR_OK != err)
2061 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
2062 jb_err_to_string(err));
2066 /* XXX: ocmd is a misleading name */
2067 http->ocmd = strdup(http->cmd);
2068 if (http->ocmd == NULL)
2070 log_error(LOG_LEVEL_FATAL,
2071 "Out of memory copying rewritten HTTP request line");
2079 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2080 /*********************************************************************
2082 * Function : server_response_is_complete
2084 * Description : Determines whether we should stop reading
2085 * from the server socket.
2088 * 1 : csp = Current client state (buffers, headers, etc...)
2089 * 2 : content_length = Length of content received so far.
2091 * Returns : TRUE if the response is complete,
2094 *********************************************************************/
2095 static int server_response_is_complete(struct client_state *csp, size_t content_length)
2097 int content_length_known = (csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
2099 if (!strcmpic(csp->http->gpc, "HEAD"))
2102 * "HEAD" implies no body, we are thus expecting
2103 * no content. XXX: incomplete "list" of methods?
2105 csp->expected_content_length = 0;
2106 content_length_known = TRUE;
2109 if (csp->http->status == 304)
2112 * Expect no body. XXX: incomplete "list" of status codes?
2114 csp->expected_content_length = 0;
2115 content_length_known = TRUE;
2118 return (content_length_known && ((0 == csp->expected_content_length)
2119 || (csp->expected_content_length <= content_length)));
2121 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2123 /*********************************************************************
2125 * Function : mark_server_socket_tainted
2127 * Description : Makes sure we don't reuse a server socket
2128 * (if we didn't read everything the server sent
2129 * us reusing the socket would lead to garbage).
2132 * 1 : csp = Current client state (buffers, headers, etc...)
2136 *********************************************************************/
2137 static void mark_server_socket_tainted(struct client_state *csp)
2139 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
2141 log_error(LOG_LEVEL_CONNECT, "Unsetting keep-alive flag.");
2142 csp->flags &= ~CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE;
2146 /*********************************************************************
2148 * Function : get_request_line
2150 * Description : Read the client request line.
2153 * 1 : csp = Current client state (buffers, headers, etc...)
2155 * Returns : Pointer to request line or NULL in case of errors.
2157 *********************************************************************/
2158 static char *get_request_line(struct client_state *csp)
2160 char buf[BUFFER_SIZE];
2161 char *request_line = NULL;
2164 memset(buf, 0, sizeof(buf));
2168 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
2170 log_error(LOG_LEVEL_ERROR,
2171 "Stopped waiting for the request line.");
2175 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2177 if (len <= 0) return NULL;
2180 * If there is no memory left for buffering the
2181 * request, there is nothing we can do but hang up
2183 if (add_to_iob(csp, buf, len))
2188 request_line = get_header(csp->iob);
2190 } while ((NULL != request_line) && ('\0' == *request_line));
2192 return request_line;
2197 /*********************************************************************
2199 * Function : receive_client_request
2201 * Description : Read the client's request (more precisely the
2202 * client headers) and answer it if necessary.
2204 * Note that since we're not using select() we could get
2205 * blocked here if a client connected, then didn't say
2209 * 1 : csp = Current client state (buffers, headers, etc...)
2211 * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
2213 *********************************************************************/
2214 static jb_err receive_client_request(struct client_state *csp)
2216 char buf[BUFFER_SIZE];
2219 struct http_request *http;
2223 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
2224 struct list header_list;
2225 struct list *headers = &header_list;
2229 memset(buf, 0, sizeof(buf));
2231 req = get_request_line(csp);
2233 if ((NULL != req) && ('\0' != *req))
2235 /* Request received. Validate and parse it. */
2237 /* Does the request line look invalid? */
2238 if (client_protocol_is_unsupported(csp, req))
2241 * Yes. The request has already been
2242 * answered with a error response, the buffers
2243 * were freed and we're done with chatting.
2245 return JB_ERR_PARSE;
2248 #ifdef FEATURE_FORCE_LOAD
2250 * If this request contains the FORCE_PREFIX and blocks
2251 * aren't enforced, get rid of it and set the force flag.
2253 if (strstr(req, FORCE_PREFIX))
2255 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
2257 log_error(LOG_LEVEL_FORCE,
2258 "Ignored force prefix in request: \"%s\".", req);
2262 strclean(req, FORCE_PREFIX);
2263 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
2264 csp->flags |= CSP_FLAG_FORCED;
2267 #endif /* def FEATURE_FORCE_LOAD */
2269 err = parse_http_request(req, http, csp);
2270 if (JB_ERR_OK != err)
2272 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", jb_err_to_string(err));
2278 if (http->cmd == NULL)
2280 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
2281 /* XXX: Use correct size */
2282 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2283 log_error(LOG_LEVEL_ERROR, "Invalid header received from %s.", csp->ip_addr_str);
2285 free_http_request(http);
2286 return JB_ERR_PARSE;
2289 /* grab the rest of the client's headers */
2293 p = get_header(csp->iob);
2297 /* There are no additional headers to read. */
2304 * We didn't receive a complete header
2305 * line yet, get the rest of it.
2307 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
2309 log_error(LOG_LEVEL_ERROR,
2310 "Stopped grabbing the client headers.");
2311 return JB_ERR_PARSE;
2314 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2317 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
2318 destroy_list(headers);
2319 return JB_ERR_PARSE;
2322 if (add_to_iob(csp, buf, len))
2325 * If there is no memory left for buffering the
2326 * request, there is nothing we can do but hang up
2328 destroy_list(headers);
2329 return JB_ERR_MEMORY;
2335 * We were able to read a complete
2336 * header and can finaly enlist it.
2343 if (http->host == NULL)
2346 * If we still don't know the request destination,
2347 * the request is invalid or the client uses
2348 * Privoxy without its knowledge.
2350 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
2353 * Our attempts to get the request destination
2354 * elsewhere failed or Privoxy is configured
2355 * to only accept proxy requests.
2357 * An error response has already been send
2358 * and we're done here.
2360 return JB_ERR_PARSE;
2365 * Determine the actions for this URL
2367 #ifdef FEATURE_TOGGLE
2368 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
2370 /* Most compatible set of actions (i.e. none) */
2371 init_current_action(csp->action);
2374 #endif /* ndef FEATURE_TOGGLE */
2376 get_url_actions(csp, http);
2380 * Save a copy of the original request for logging
2382 http->ocmd = strdup(http->cmd);
2383 if (http->ocmd == NULL)
2385 log_error(LOG_LEVEL_FATAL,
2386 "Out of memory copying HTTP request line");
2388 enlist(csp->headers, http->cmd);
2390 /* Append the previously read headers */
2391 list_append_list_unique(csp->headers, headers);
2392 destroy_list(headers);
2399 /*********************************************************************
2401 * Function : parse_client_request
2403 * Description : Parses the client's request and decides what to do
2406 * Note that since we're not using select() we could get
2407 * blocked here if a client connected, then didn't say
2411 * 1 : csp = Current client state (buffers, headers, etc...)
2413 * Returns : JB_ERR_OK or JB_ERR_PARSE
2415 *********************************************************************/
2416 static jb_err parse_client_request(struct client_state *csp)
2418 struct http_request *http = csp->http;
2421 err = sed(csp, FILTER_CLIENT_HEADERS);
2422 if (JB_ERR_OK != err)
2424 /* XXX: Should be handled in sed(). */
2425 assert(err == JB_ERR_PARSE);
2426 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers.");
2428 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2430 /* Check request line for rewrites. */
2431 if ((NULL == csp->headers->first->str)
2432 || (strcmp(http->cmd, csp->headers->first->str) &&
2433 (JB_ERR_OK != change_request_destination(csp))))
2436 * A header filter broke the request line - bail out.
2438 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
2439 /* XXX: Use correct size */
2440 log_error(LOG_LEVEL_CLF,
2441 "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
2442 log_error(LOG_LEVEL_ERROR,
2443 "Invalid request line after applying header filters.");
2444 free_http_request(http);
2446 return JB_ERR_PARSE;
2454 /*********************************************************************
2458 * Description : Once a connection to the client has been accepted,
2459 * this function is called (via serve()) to handle the
2460 * main business of the communication. When this
2461 * function returns, the caller must close the client
2464 * FIXME: chat is nearly thousand lines long.
2468 * 1 : csp = Current client state (buffers, headers, etc...)
2470 * Returns : Nothing.
2472 *********************************************************************/
2473 static void chat(struct client_state *csp)
2475 char buf[BUFFER_SIZE];
2482 int ms_iis5_hack = 0;
2483 size_t byte_count = 0;
2484 int forwarded_connect_retries = 0;
2485 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
2486 const struct forward_spec *fwd;
2487 struct http_request *http;
2488 int len; /* for buffer sizes (and negative error codes) */
2490 /* Function that does the content filtering for the current request */
2491 filter_function_ptr content_filter = NULL;
2493 /* Skeleton for HTTP response, if we should intercept the request */
2494 struct http_response *rsp;
2495 struct timeval timeout;
2497 memset(buf, 0, sizeof(buf));
2498 memset(&timeout, 0, sizeof(timeout));
2499 timeout.tv_sec = csp->config->socket_timeout;
2503 if (receive_client_request(csp) != JB_ERR_OK)
2507 if (parse_client_request(csp) != JB_ERR_OK)
2512 /* decide how to route the HTTP request */
2513 fwd = forward_url(csp, http);
2516 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
2517 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2521 * build the http request to send to the server
2522 * we have to do one of the following:
2524 * create = use the original HTTP request to create a new
2525 * HTTP request that has either the path component
2526 * without the http://domainspec (w/path) or the
2527 * full orininal URL (w/url)
2528 * Note that the path and/or the HTTP version may
2529 * have been altered by now.
2531 * connect = Open a socket to the host:port of the server
2532 * and short-circuit server and client socket.
2534 * pass = Pass the request unchanged if forwarding a CONNECT
2535 * request to a parent proxy. Note that we'll be sending
2536 * the CFAIL message ourselves if connecting to the parent
2537 * fails, but we won't send a CSUCCEED message if it works,
2538 * since that would result in a double message (ours and the
2539 * parent's). After sending the request to the parent, we simply
2542 * here's the matrix:
2545 * +--------+--------+
2547 * 0 | create | connect|
2549 * Forwarding +--------+--------+
2551 * 1 | create | pass |
2553 * +--------+--------+
2557 if (http->ssl && connect_port_is_forbidden(csp))
2559 const char *acceptable_connect_ports =
2560 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
2561 assert(NULL != acceptable_connect_ports);
2562 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
2563 "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
2564 csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
2565 csp->action->flags |= ACTION_BLOCK;
2571 freez(csp->headers->first->str);
2572 build_request_line(csp, fwd, &csp->headers->first->str);
2576 * We have a request. Check if one of the crunchers wants it.
2578 if (crunch_response_triggered(csp, crunchers_all))
2581 * Yes. The client got the crunch response
2582 * and we are done here after cleaning up.
2584 /* XXX: why list_remove_all()? */
2585 list_remove_all(csp->headers);
2590 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2592 if (fwd->forward_host)
2594 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2595 fwd->forward_host, fwd->forward_port, http->hostport);
2599 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2602 /* here we connect to the server, gateway, or the forwarder */
2604 while ((csp->sfd = forwarded_connect(fwd, http, csp))
2605 && (errno == EINVAL)
2606 && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2608 log_error(LOG_LEVEL_ERROR,
2609 "failed request #%u to connect to %s. Trying again.",
2610 forwarded_connect_retries, http->hostport);
2613 if (csp->sfd == JB_INVALID_SOCKET)
2615 if (fwd->type != SOCKS_NONE)
2618 rsp = error_response(csp, "forwarding-failed", errno);
2620 else if (errno == EINVAL)
2622 rsp = error_response(csp, "no-such-domain", errno);
2626 rsp = error_response(csp, "connect-failed", errno);
2627 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2631 /* Write the answer to the client */
2634 send_crunch_response(csp, rsp);
2640 hdr = list_to_text(csp->headers);
2643 /* FIXME Should handle error properly */
2644 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2646 list_remove_all(csp->headers);
2648 if (fwd->forward_host || (http->ssl == 0))
2651 * Write the client's (modified) header to the server
2652 * (along with anything else that may be in the buffer)
2654 if (write_socket(csp->sfd, hdr, strlen(hdr))
2655 || (flush_socket(csp->sfd, csp->iob) < 0))
2657 log_error(LOG_LEVEL_CONNECT,
2658 "write header to: %s failed: %E", http->hostport);
2660 rsp = error_response(csp, "connect-failed", errno);
2663 send_crunch_response(csp, rsp);
2673 * We're running an SSL tunnel and we're not forwarding,
2674 * so just send the "connect succeeded" message to the
2675 * client, flush the rest, and get out of the way.
2677 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
2685 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2687 /* we're finished with the client's header */
2690 maxfd = (csp->cfd > csp->sfd) ? csp->cfd : csp->sfd;
2692 /* pass data between the client and server
2693 * until one or the other shuts down the connection.
2702 * FD_ZERO here seems to point to an errant macro which crashes.
2703 * So do this by hand for now...
2705 memset(&rfds,0x00,sizeof(fd_set));
2709 FD_SET(csp->cfd, &rfds);
2710 FD_SET(csp->sfd, &rfds);
2712 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2713 if ((csp->flags & CSP_FLAG_CHUNKED)
2714 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
2715 && ((csp->iob->eod - csp->iob->cur) >= 5)
2716 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
2718 log_error(LOG_LEVEL_CONNECT,
2719 "Looks like we read the last chunk together with "
2720 "the server headers. We better stop reading.");
2721 byte_count = (size_t)(csp->iob->eod - csp->iob->cur);
2722 csp->expected_content_length = byte_count;
2723 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2725 if (server_body && server_response_is_complete(csp, byte_count))
2727 log_error(LOG_LEVEL_CONNECT,
2728 "Done reading from server. Expected content length: %d. "
2729 "Actual content length: %d. Most recently received: %d.",
2730 csp->expected_content_length, byte_count, len);
2733 * XXX: should not jump around,
2734 * chat() is complicated enough already.
2738 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2740 n = select((int)maxfd+1, &rfds, NULL, NULL, &timeout);
2744 log_error(LOG_LEVEL_ERROR, "Didn't receive data in time.");
2745 mark_server_socket_tainted(csp);
2750 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2751 mark_server_socket_tainted(csp);
2756 * This is the body of the browser's request,
2757 * just read and write it.
2759 if (FD_ISSET(csp->cfd, &rfds))
2761 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2765 /* XXX: not sure if this is necessary. */
2766 mark_server_socket_tainted(csp);
2767 break; /* "game over, man" */
2770 if (write_socket(csp->sfd, buf, (size_t)len))
2772 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2773 mark_server_socket_tainted(csp);
2780 * The server wants to talk. It could be the header or the body.
2781 * If `hdr' is null, then it's the header otherwise it's the body.
2782 * FIXME: Does `hdr' really mean `host'? No.
2784 if (FD_ISSET(csp->sfd, &rfds))
2787 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2791 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2793 if (http->ssl && (fwd->forward_host == NULL))
2796 * Just hang up. We already confirmed the client's CONNECT
2797 * request with status code 200 and unencrypted content is
2798 * no longer welcome.
2800 log_error(LOG_LEVEL_ERROR,
2801 "CONNECT already confirmed. Unable to tell the client about the problem.");
2804 else if (byte_count)
2807 * Just hang up. We already transmitted the original headers
2808 * and parts of the original content and therefore missed the
2809 * chance to send an error message (without risking data corruption).
2811 * XXX: we could retry with a fancy range request here.
2813 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2814 "Unable to tell the client about the problem.");
2815 mark_server_socket_tainted(csp);
2819 rsp = error_response(csp, "connect-failed", errno);
2822 send_crunch_response(csp, rsp);
2828 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2829 if (csp->flags & CSP_FLAG_CHUNKED)
2831 if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2833 /* XXX: this is a temporary hack */
2834 log_error(LOG_LEVEL_CONNECT,
2835 "Looks like we reached the end of the last chunk. "
2836 "We better stop reading.");
2837 csp->expected_content_length = byte_count + (size_t)len;
2838 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2842 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2845 * Add a trailing zero to let be able to use string operations.
2846 * XXX: do we still need this with filter_popups gone?
2851 * Normally, this would indicate that we've read
2852 * as much as the server has sent us and we can
2853 * close the client connection. However, Microsoft
2854 * in its wisdom has released IIS/5 with a bug that
2855 * prevents it from sending the trailing \r\n in
2856 * a 302 redirect header (and possibly other headers).
2857 * To work around this if we've haven't parsed
2858 * a full header we'll append a trailing \r\n
2859 * and see if this now generates a valid one.
2861 * This hack shouldn't have any impacts. If we've
2862 * already transmitted the header or if this is a
2863 * SSL connection, then we won't bother with this
2864 * hack. So we only work on partially received
2865 * headers. If we append a \r\n and this still
2866 * doesn't generate a valid header, then we won't
2867 * transmit anything to the client.
2872 if (server_body || http->ssl)
2875 * If we have been buffering up the document,
2876 * now is the time to apply content modification
2877 * and send the result to the client.
2881 p = execute_content_filter(csp, content_filter);
2883 * If the content filter fails, use the original
2884 * buffer and length.
2885 * (see p != NULL ? p : csp->iob->cur below)
2889 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2892 if (JB_ERR_OK != update_server_headers(csp))
2894 log_error(LOG_LEVEL_FATAL,
2895 "Failed to update server headers. after filtering.");
2898 hdr = list_to_text(csp->headers);
2901 /* FIXME Should handle error properly */
2902 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2905 if (write_socket(csp->cfd, hdr, strlen(hdr))
2906 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
2908 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2911 mark_server_socket_tainted(csp);
2919 break; /* "game over, man" */
2923 * This is NOT the body, so
2924 * Let's pretend the server just sent us a blank line.
2926 snprintf(buf, sizeof(buf), "\r\n");
2927 len = (int)strlen(buf);
2930 * Now, let the normal header parsing algorithm below do its
2931 * job. If it fails, we'll exit instead of continuing.
2938 * If this is an SSL connection or we're in the body
2939 * of the server document, just write it to the client,
2940 * unless we need to buffer the body for later content-filtering
2942 if (server_body || http->ssl)
2947 * If there is no memory left for buffering the content, or the buffer limit
2948 * has been reached, switch to non-filtering mode, i.e. make & write the
2949 * header, flush the iob and buf, and get out of the way.
2951 if (add_to_iob(csp, buf, len))
2956 log_error(LOG_LEVEL_INFO,
2957 "Flushing header and buffers. Stepping back from filtering.");
2959 hdr = list_to_text(csp->headers);
2963 * Memory is too tight to even generate the header.
2964 * Send our static "Out-of-memory" page.
2966 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2967 rsp = cgi_error_memory();
2968 send_crunch_response(csp, rsp);
2969 mark_server_socket_tainted(csp);
2972 hdrlen = strlen(hdr);
2974 if (write_socket(csp->cfd, hdr, hdrlen)
2975 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
2976 || (write_socket(csp->cfd, buf, (size_t)len)))
2978 log_error(LOG_LEVEL_CONNECT,
2979 "Flush header and buffers to client failed: %E");
2981 mark_server_socket_tainted(csp);
2986 * Reset the byte_count to the amount of bytes
2987 * we just flushed. len will be added a few lines below,
2988 * hdrlen doesn't matter for LOG_LEVEL_CLF.
2990 byte_count = (size_t)flushed;
2992 content_filter = NULL;
2998 if (write_socket(csp->cfd, buf, (size_t)len))
3000 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
3001 mark_server_socket_tainted(csp);
3005 byte_count += (size_t)len;
3010 const char *header_start;
3012 * We're still looking for the end of the server's header.
3013 * Buffer up the data we just read. If that fails, there's
3014 * little we can do but send our static out-of-memory page.
3016 if (add_to_iob(csp, buf, len))
3018 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
3019 rsp = cgi_error_memory();
3020 send_crunch_response(csp, rsp);
3021 mark_server_socket_tainted(csp);
3025 header_start = csp->iob->cur;
3027 /* Convert iob into something sed() can digest */
3028 if (JB_ERR_PARSE == get_server_headers(csp))
3033 * Well, we tried our MS IIS/5 hack and it didn't work.
3034 * The header is incomplete and there isn't anything
3035 * we can do about it.
3037 log_error(LOG_LEVEL_INFO,
3038 "MS IIS5 hack didn't produce valid headers.");
3044 * Since we have to wait for more from the server before
3045 * we can parse the headers we just continue here.
3047 int header_offset = csp->iob->cur - header_start;
3048 assert(csp->iob->cur >= header_start);
3049 byte_count += (size_t)(len - header_offset);
3050 log_error(LOG_LEVEL_CONNECT, "Continuing buffering headers. "
3051 "byte_count: %d. header_offset: %d. len: %d.",
3052 byte_count, header_offset, len);
3057 /* Did we actually get anything? */
3058 if (NULL == csp->headers->first)
3060 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
3061 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3062 write_socket(csp->cfd, NO_SERVER_DATA_RESPONSE, strlen(NO_SERVER_DATA_RESPONSE));
3063 free_http_request(http);
3064 mark_server_socket_tainted(csp);
3068 assert(csp->headers->first->str);
3070 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
3071 strncmpic(csp->headers->first->str, "ICY", 3))
3074 * It doesn't look like a HTTP (or Shoutcast) response:
3075 * tell the client and log the problem.
3077 if (strlen(csp->headers->first->str) > 30)
3079 csp->headers->first->str[30] = '\0';
3081 log_error(LOG_LEVEL_ERROR,
3082 "Invalid server or forwarder response. Starts with: %s",
3083 csp->headers->first->str);
3084 log_error(LOG_LEVEL_CLF,
3085 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3086 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
3087 strlen(INVALID_SERVER_HEADERS_RESPONSE));
3088 free_http_request(http);
3089 mark_server_socket_tainted(csp);
3094 * We have now received the entire server header,
3095 * filter it and send the result to the client
3097 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
3099 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
3101 hdr = list_to_text(csp->headers);
3104 /* FIXME Should handle error properly */
3105 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3108 if (crunch_response_triggered(csp, crunchers_light))
3111 * One of the tags created by a server-header
3112 * tagger triggered a crunch. We already
3113 * delivered the crunch response to the client
3114 * and are done here after cleaning up.
3117 mark_server_socket_tainted(csp);
3120 /* Buffer and pcrs filter this if appropriate. */
3122 if (!http->ssl) /* We talk plaintext */
3124 content_filter = get_filter_function(csp);
3127 * Only write if we're not buffering for content modification
3129 if (!content_filter)
3132 * Write the server's (modified) header to
3133 * the client (along with anything else that
3134 * may be in the buffer)
3137 if (write_socket(csp->cfd, hdr, strlen(hdr))
3138 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
3140 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
3143 * The write failed, so don't bother mentioning it
3144 * to the client... it probably can't hear us anyway.
3147 mark_server_socket_tainted(csp);
3151 byte_count += (size_t)len;
3156 * XXX: the header lenght should probably
3157 * be calculated by get_server_headers().
3159 int header_length = csp->iob->cur - header_start;
3160 assert(csp->iob->cur > header_start);
3161 byte_count += (size_t)(len - header_length);
3164 /* we're finished with the server's header */
3170 * If this was a MS IIS/5 hack then it means the server
3171 * has already closed the connection. Nothing more to read.
3176 log_error(LOG_LEVEL_INFO,
3177 "Closed server connection detected with MS IIS5 hack enabled.");
3183 mark_server_socket_tainted(csp);
3184 return; /* huh? we should never get here */
3187 if (csp->content_length == 0)
3190 * If Privoxy didn't recalculate the Content-Lenght,
3191 * byte_count is still correct.
3193 csp->content_length = byte_count;
3196 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3197 && (csp->expected_content_length != byte_count))
3199 log_error(LOG_LEVEL_CONNECT,
3200 "Received %d bytes while expecting %d.",
3201 byte_count, csp->expected_content_length);
3202 mark_server_socket_tainted(csp);
3205 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
3206 csp->ip_addr_str, http->ocmd, csp->content_length);
3210 /*********************************************************************
3214 * Description : This is little more than chat. We only "serve" to
3215 * to close any socket that chat may have opened.
3218 * 1 : csp = Current client state (buffers, headers, etc...)
3222 *********************************************************************/
3224 void serve(struct client_state *csp)
3225 #else /* ifndef AMIGA */
3226 static void serve(struct client_state *csp)
3227 #endif /* def AMIGA */
3230 close_socket(csp->cfd);
3232 if (csp->sfd != JB_INVALID_SOCKET)
3234 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3235 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
3236 && (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
3238 remember_connection(csp->sfd, csp->http, forward_url(csp, csp->http));
3242 forget_connection(csp->sfd);
3243 close_socket(csp->sfd);
3246 close_socket(csp->sfd);
3247 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3250 csp->flags &= ~CSP_FLAG_ACTIVE;
3256 /*********************************************************************
3258 * Function : server_thread
3260 * Description : We only exist to call `serve' in a threaded environment.
3263 * 1 : data = Current client state (buffers, headers, etc...)
3265 * Returns : Always 0.
3267 *********************************************************************/
3268 static int32 server_thread(void *data)
3270 serve((struct client_state *) data);
3277 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3278 /*********************************************************************
3282 * Description : Print usage info & exit.
3284 * Parameters : Pointer to argv[0] for identifying ourselves
3288 *********************************************************************/
3289 static void usage(const char *myname)
3291 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
3295 #endif /* defined(unix) */
3298 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
3299 #endif /* defined(unix) */
3300 "[--version] [configfile]\n"
3301 "Aborting\n", myname);
3306 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
3309 #ifdef MUTEX_LOCKS_AVAILABLE
3310 /*********************************************************************
3312 * Function : privoxy_mutex_lock
3314 * Description : Locks a mutex.
3317 * 1 : mutex = The mutex to lock.
3319 * Returns : Void. May exit in case of errors.
3321 *********************************************************************/
3322 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
3324 #ifdef FEATURE_PTHREAD
3325 int err = pthread_mutex_lock(mutex);
3328 if (mutex != &log_mutex)
3330 log_error(LOG_LEVEL_FATAL,
3331 "Mutex locking failed: %s.\n", strerror(err));
3336 EnterCriticalSection(mutex);
3337 #endif /* def FEATURE_PTHREAD */
3341 /*********************************************************************
3343 * Function : privoxy_mutex_unlock
3345 * Description : Unlocks a mutex.
3348 * 1 : mutex = The mutex to unlock.
3350 * Returns : Void. May exit in case of errors.
3352 *********************************************************************/
3353 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
3355 #ifdef FEATURE_PTHREAD
3356 int err = pthread_mutex_unlock(mutex);
3359 if (mutex != &log_mutex)
3361 log_error(LOG_LEVEL_FATAL,
3362 "Mutex unlocking failed: %s.\n", strerror(err));
3367 LeaveCriticalSection(mutex);
3368 #endif /* def FEATURE_PTHREAD */
3372 /*********************************************************************
3374 * Function : privoxy_mutex_init
3376 * Description : Prepares a mutex.
3379 * 1 : mutex = The mutex to initialize.
3381 * Returns : Void. May exit in case of errors.
3383 *********************************************************************/
3384 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
3386 #ifdef FEATURE_PTHREAD
3387 int err = pthread_mutex_init(mutex, 0);
3390 printf("Fatal error. Mutex initialization failed: %s.\n",
3395 InitializeCriticalSection(mutex);
3396 #endif /* def FEATURE_PTHREAD */
3398 #endif /* def MUTEX_LOCKS_AVAILABLE */
3400 /*********************************************************************
3402 * Function : initialize_mutexes
3404 * Description : Prepares mutexes if mutex support is available.
3408 * Returns : Void, exits in case of errors.
3410 *********************************************************************/
3411 static void initialize_mutexes(void)
3413 #ifdef MUTEX_LOCKS_AVAILABLE
3415 * Prepare global mutex semaphores
3417 privoxy_mutex_init(&log_mutex);
3418 privoxy_mutex_init(&log_init_mutex);
3419 privoxy_mutex_init(&connection_reuse_mutex);
3422 * XXX: The assumptions below are a bit naive
3423 * and can cause locks that aren't necessary.
3425 * For example older FreeBSD versions (< 6.x?)
3426 * have no gethostbyname_r, but gethostbyname is
3429 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
3430 privoxy_mutex_init(&resolver_mutex);
3431 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
3433 * XXX: should we use a single mutex for
3434 * localtime() and gmtime() as well?
3436 #ifndef HAVE_GMTIME_R
3437 privoxy_mutex_init(&gmtime_mutex);
3438 #endif /* ndef HAVE_GMTIME_R */
3440 #ifndef HAVE_LOCALTIME_R
3441 privoxy_mutex_init(&localtime_mutex);
3442 #endif /* ndef HAVE_GMTIME_R */
3445 privoxy_mutex_init(&rand_mutex);
3446 #endif /* ndef HAVE_RANDOM */
3447 #endif /* def MUTEX_LOCKS_AVAILABLE */
3451 /*********************************************************************
3455 * Description : Load the config file and start the listen loop.
3456 * This function is a lot more *sane* with the `load_config'
3457 * and `listen_loop' functions; although it stills does
3458 * a *little* too much for my taste.
3461 * 1 : argc = Number of parameters (including $0).
3462 * 2 : argv = Array of (char *)'s to the parameters.
3464 * Returns : 1 if : can't open config file, unrecognized directive,
3465 * stats requested in multi-thread mode, can't open the
3466 * log file, can't open the jar file, listen port is invalid,
3467 * any load fails, and can't bind port.
3469 * Else main never returns, the process must be signaled
3470 * to terminate execution. Or, on Windows, use the
3471 * "File", "Exit" menu option.
3473 *********************************************************************/
3475 int real_main(int argc, const char *argv[])
3477 int main(int argc, const char *argv[])
3481 unsigned int random_seed;
3483 struct passwd *pw = NULL;
3484 struct group *grp = NULL;
3487 char *pre_chroot_nslookup_to_load_resolver = NULL;
3494 #if !defined(_WIN32)
3502 * Parse the command line arguments
3504 * XXX: simply printing usage information in case of
3505 * invalid arguments isn't particularly user friendly.
3507 while (++argc_pos < argc)
3510 /* Check to see if the service must be installed or uninstalled */
3511 if (strncmp(argv[argc_pos], "--install", 9) == 0)
3513 const char *pName = argv[argc_pos] + 9;
3516 exit( (install_service(pName)) ? 0 : 1 );
3518 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
3520 const char *pName = argv[argc_pos] + 11;
3523 exit((uninstall_service(pName)) ? 0 : 1);
3525 else if (strcmp(argv[argc_pos], "--service" ) == 0)
3527 bRunAsService = TRUE;
3528 w32_set_service_cwd();
3529 atexit(w32_service_exit_notify);
3532 #endif /* defined(_WIN32) */
3535 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3537 if (strcmp(argv[argc_pos], "--help") == 0)
3542 else if(strcmp(argv[argc_pos], "--version") == 0)
3544 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
3550 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
3555 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
3557 if (++argc_pos == argc) usage(argv[0]);
3558 pidfile = strdup(argv[argc_pos]);
3561 else if (strcmp(argv[argc_pos], "--user" ) == 0)
3563 if (++argc_pos == argc) usage(argv[argc_pos]);
3565 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
3568 if (NULL == (grp = getgrnam(p)))
3570 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
3574 if (NULL == (pw = getpwnam(argv[argc_pos])))
3576 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
3579 if (p != NULL) *--p = '\0';
3582 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
3584 if (++argc_pos == argc) usage(argv[0]);
3585 pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
3588 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
3592 #endif /* defined(unix) */
3594 else if (argc_pos + 1 != argc)
3597 * This is neither the last command line
3598 * option, nor was it recognized before,
3599 * therefore it must be invalid.
3605 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3607 configfile = argv[argc_pos];
3610 } /* -END- while (more arguments) */
3613 if ( *configfile != '/' )
3615 char cwd[BUFFER_SIZE];
3617 size_t abs_file_size;
3619 /* make config-filename absolute here */
3620 if (NULL == getcwd(cwd, sizeof(cwd)))
3622 perror("failed to get current working directory");
3627 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3628 basedir = strdup(cwd);
3630 if (NULL == basedir ||
3631 NULL == (abs_file = malloc(abs_file_size)))
3633 perror("malloc failed");
3636 strlcpy(abs_file, basedir, abs_file_size);
3637 strlcat(abs_file, "/", abs_file_size );
3638 strlcat(abs_file, configfile, abs_file_size);
3639 configfile = abs_file;
3641 #endif /* defined unix */
3645 clients->next = NULL;
3647 /* XXX: factor out initialising after the next stable release. */
3650 #elif defined(_WIN32)
3654 /* Prepare mutexes if supported and necessary. */
3655 initialize_mutexes();
3657 /* Enable logging until further notice. */
3658 init_log_module(Argv[0]);
3660 random_seed = (unsigned int)time(NULL);
3662 srandom(random_seed);
3665 #endif /* ifdef HAVE_RANDOM */
3668 * Unix signal handling
3670 * Catch the abort, interrupt and terminate signals for a graceful exit
3671 * Catch the hangup signal so the errlog can be reopened.
3672 * Ignore the broken pipe signals (FIXME: Why?)
3674 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3677 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3678 const int ignored_signals[] = { SIGPIPE, 0 };
3680 for (idx = 0; catched_signals[idx] != 0; idx++)
3682 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3683 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3685 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3686 #endif /* ifdef sun */
3688 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3692 for (idx = 0; ignored_signals[idx] != 0; idx++)
3694 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3696 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3701 #else /* ifdef _WIN32 */
3702 # ifdef _WIN_CONSOLE
3704 * We *are* in a windows console app.
3705 * Print a verbose messages about FAQ's and such
3707 printf("%s", win32_blurb);
3708 # endif /* def _WIN_CONSOLE */
3709 #endif /* def _WIN32 */
3712 /* Initialize the CGI subsystem */
3713 cgi_init_error_messages();
3716 * If runnig on unix and without the --nodaemon
3717 * option, become a daemon. I.e. fork, detach
3718 * from tty and get process group leadership
3731 if ( pid < 0 ) /* error */
3736 else if ( pid != 0 ) /* parent */
3741 * must check for errors
3742 * child died due to missing files aso
3745 wpid = waitpid( pid, &status, WNOHANG );
3754 /* Should be more portable, but not as well tested */
3759 #else /* ndef __FreeBSD__ */
3761 #endif /* ndef __FreeBSD__ */
3762 fd = open("/dev/tty", O_RDONLY);
3765 /* no error check here */
3766 ioctl( fd, TIOCNOTTY,0 );
3771 * stderr (fd 2) will be closed later on, when the
3772 * log file has been parsed.
3779 } /* -END- if (!no_daemon) */
3782 * As soon as we have written the PID file, we can switch
3783 * to the user and group ID indicated by the --user option
3789 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3791 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3797 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3799 /* Read the time zone file from /etc before doing chroot. */
3801 if (NULL != pre_chroot_nslookup_to_load_resolver
3802 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3804 /* Initialize resolver library. */
3805 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3807 if (chroot(pw->pw_dir) < 0)
3809 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3813 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3816 if (setuid(pw->pw_uid))
3818 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3822 char putenv_dummy[64];
3824 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3825 if (putenv(putenv_dummy) != 0)
3827 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3830 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3831 if (putenv(putenv_dummy) != 0)
3833 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3839 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3842 #endif /* defined unix */
3845 /* This will be FALSE unless the command line specified --service
3849 /* Yup, so now we must attempt to establish a connection
3850 * with the service dispatcher. This will only work if this
3851 * process was launched by the service control manager to
3852 * actually run as a service. If this isn't the case, i've
3853 * known it take around 30 seconds or so for the call to return.
3856 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3857 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3859 /* Service has run, and at this point is now being stopped, so just return */
3864 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3866 /* An error occurred. Usually it's because --service was wrongly specified
3867 * and we were unable to connect to the Service Control Dispatcher because
3868 * it wasn't expecting us and is therefore not listening.
3870 * For now, just continue below to call the listen_loop function.
3873 #endif /* def _WIN32 */
3883 /*********************************************************************
3885 * Function : bind_port_helper
3887 * Description : Bind the listen port. Handles logging, and aborts
3891 * 1 : config = Privoxy configuration. Specifies port
3894 * Returns : Port that was opened.
3896 *********************************************************************/
3897 static jb_socket bind_port_helper(struct configuration_spec * config)
3902 if (config->haddr == NULL)
3904 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3909 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3910 config->hport, config->haddr);
3913 result = bind_port(config->haddr, config->hport, &bfd);
3920 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3921 "There may be another Privoxy or some other "
3922 "proxy running on port %d",
3923 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
3924 config->hport, config->hport);
3927 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3928 "The hostname is not resolvable",
3929 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3932 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
3933 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3936 /* shouldn't get here */
3937 return JB_INVALID_SOCKET;
3940 config->need_bind = 0;
3947 /* Without this simple workaround we get this compiler warning from _beginthread
3948 * warning C4028: formal parameter 1 different from declaration
3950 void w32_service_listen_loop(void *p)
3954 #endif /* def _WIN32 */
3957 /*********************************************************************
3959 * Function : listen_loop
3961 * Description : bind the listen port and enter a "FOREVER" listening loop.
3967 *********************************************************************/
3968 static void listen_loop(void)
3970 struct client_state *csp = NULL;
3972 struct configuration_spec * config;
3974 config = load_config();
3976 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3978 * XXX: Should be relocated once it no
3979 * longer needs to emit log messages.
3981 initialize_reusable_connections();
3982 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3984 bfd = bind_port_helper(config);
3986 #ifdef FEATURE_GRACEFUL_TERMINATION
3987 while (!g_terminate)
3992 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
3993 while (waitpid(-1, NULL, WNOHANG) > 0)
3995 /* zombie children */
3997 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
4000 * Free data that was used by died threads
4006 * Re-open the errlog after HUP signal
4008 if (received_hup_signal)
4010 if (NULL != config->logfile)
4012 init_error_log(Argv[0], config->logfile);
4014 received_hup_signal = 0;
4018 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
4020 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
4024 csp->flags |= CSP_FLAG_ACTIVE;
4025 csp->sfd = JB_INVALID_SOCKET;
4027 csp->config = config = load_config();
4029 if ( config->need_bind )
4032 * Since we were listening to the "old port", we will not see
4033 * a "listen" param change until the next IJB request. So, at
4034 * least 1 more request must be made for us to find the new
4035 * setting. I am simply closing the old socket and binding the
4038 * Which-ever is correct, we will serve 1 more page via the
4039 * old settings. This should probably be a "show-proxy-args"
4040 * request. This should not be a so common of an operation
4041 * that this will hurt people's feelings.
4046 bfd = bind_port_helper(config);
4049 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
4051 if (!accept_connection(csp, bfd))
4053 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
4066 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
4069 #ifdef FEATURE_TOGGLE
4070 if (global_toggle_state)
4071 #endif /* def FEATURE_TOGGLE */
4073 csp->flags |= CSP_FLAG_TOGGLED_ON;
4076 if (run_loader(csp))
4078 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
4079 /* Never get here - LOG_LEVEL_FATAL causes program exit */
4083 if (block_acl(NULL,csp))
4085 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
4086 close_socket(csp->cfd);
4090 #endif /* def FEATURE_ACL */
4092 /* add it to the list of clients */
4093 csp->next = clients->next;
4094 clients->next = csp;
4096 if (config->multi_threaded)
4100 /* this is a switch () statment in the C preprocessor - ugh */
4101 #undef SELECTED_ONE_OPTION
4103 /* Use Pthreads in preference to native code */
4104 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
4105 #define SELECTED_ONE_OPTION
4107 pthread_t the_thread;
4108 pthread_attr_t attrs;
4110 pthread_attr_init(&attrs);
4111 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
4112 errno = pthread_create(&the_thread, &attrs,
4113 (void * (*)(void *))serve, csp);
4114 child_id = errno ? -1 : 0;
4115 pthread_attr_destroy(&attrs);
4119 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
4120 #define SELECTED_ONE_OPTION
4121 child_id = _beginthread(
4122 (void (*)(void *))serve,
4127 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
4128 #define SELECTED_ONE_OPTION
4129 child_id = _beginthread(
4130 (void(* _Optlink)(void*))serve,
4136 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
4137 #define SELECTED_ONE_OPTION
4139 thread_id tid = spawn_thread
4140 (server_thread, "server", B_NORMAL_PRIORITY, csp);
4142 if ((tid >= 0) && (resume_thread(tid) == B_OK))
4144 child_id = (int) tid;
4153 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
4154 #define SELECTED_ONE_OPTION
4155 csp->cfd = ReleaseSocket(csp->cfd, -1);
4158 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4159 NP_Output, Output(),
4160 NP_CloseOutput, FALSE,
4161 NP_Name, (ULONG)"privoxy child",
4165 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4166 NP_Output, Output(),
4167 NP_CloseOutput, FALSE,
4168 NP_Name, (ULONG)"privoxy child",
4169 NP_StackSize, 200*1024,
4175 ((struct Task *)child_id)->tc_UserData = csp;
4176 Signal((struct Task *)child_id, SIGF_SINGLE);
4181 #if !defined(SELECTED_ONE_OPTION)
4184 /* This block is only needed when using fork().
4185 * When using threads, the server thread was
4186 * created and run by the call to _beginthread().
4188 if (child_id == 0) /* child */
4191 #ifdef FEATURE_TOGGLE
4192 int inherited_toggle_state = global_toggle_state;
4193 #endif /* def FEATURE_TOGGLE */
4198 * If we've been toggled or we've blocked the request, tell Mom
4201 #ifdef FEATURE_TOGGLE
4202 if (inherited_toggle_state != global_toggle_state)
4204 rc |= RC_FLAG_TOGGLED;
4206 #endif /* def FEATURE_TOGGLE */
4208 #ifdef FEATURE_STATISTICS
4209 if (csp->flags & CSP_FLAG_REJECTED)
4211 rc |= RC_FLAG_BLOCKED;
4213 #endif /* ndef FEATURE_STATISTICS */
4217 else if (child_id > 0) /* parent */
4219 /* in a fork()'d environment, the parent's
4220 * copy of the client socket and the CSP
4224 #if !defined(_WIN32) && !defined(__CYGWIN__)
4226 wait( &child_status );
4229 * Evaluate child's return code: If the child has
4230 * - been toggled, toggle ourselves
4231 * - blocked its request, bump up the stats counter
4234 #ifdef FEATURE_TOGGLE
4235 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
4237 global_toggle_state = !global_toggle_state;
4239 #endif /* def FEATURE_TOGGLE */
4241 #ifdef FEATURE_STATISTICS
4243 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
4247 #endif /* def FEATURE_STATISTICS */
4249 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
4250 close_socket(csp->cfd);
4251 csp->flags &= ~CSP_FLAG_ACTIVE;
4255 #undef SELECTED_ONE_OPTION
4256 /* end of cpp switch () */
4258 if (child_id < 0) /* failed */
4260 char buf[BUFFER_SIZE];
4262 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
4264 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
4266 write_socket(csp->cfd, buf, strlen(buf));
4267 close_socket(csp->cfd);
4268 csp->flags &= ~CSP_FLAG_ACTIVE;
4279 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
4281 /* Clean up. Aim: free all memory (no leaks) */
4282 #ifdef FEATURE_GRACEFUL_TERMINATION
4284 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
4286 unload_current_config_file();
4287 unload_current_actions_file();
4288 unload_current_re_filterfile();
4289 #ifdef FEATURE_TRUST
4290 unload_current_trust_file();
4293 if (config->multi_threaded)
4300 } while ((clients->next != NULL) && (--i > 0));
4304 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
4315 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
4316 /* Cleanup - remove taskbar icon etc. */
4321 #endif /* FEATURE_GRACEFUL_TERMINATION */