1 const char jcc_rcs[] = "$Id: jcc.c,v 1.225 2009/02/19 18:09:32 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) 2001-2009 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 1.225 2009/02/19 18:09:32 fabiankeil
37 * Unbreak build without FEATURE_CONNECTION_KEEP_ALIVE.
40 * Revision 1.224 2009/02/14 15:32:04 fabiankeil
41 * Add the request URL to the timeout message in chat().
44 * Revision 1.223 2009/02/09 21:21:16 fabiankeil
45 * Now that init_log_module() is called earlier, call show_version()
46 * later on from main() directly so it doesn't get called for --help
49 * Revision 1.222 2009/02/08 12:56:51 fabiankeil
50 * Call initialize_mutexes() before init_log_module() again.
51 * Broken since r220, might be the cause of Lee's #2579448.
53 * Revision 1.221 2009/02/06 18:02:58 fabiankeil
54 * When dropping privileges, also give up membership in supplementary
55 * groups. Thanks to Matthias Drochner for reporting the problem,
56 * providing the initial patch and testing the final version.
58 * Revision 1.220 2009/02/04 18:29:07 fabiankeil
59 * Initialize the log module before parsing arguments.
60 * Thanks to Matthias Drochner for the report.
62 * Revision 1.219 2009/01/31 16:08:21 fabiankeil
63 * Remove redundant error check in receive_client_request().
65 * Revision 1.218 2009/01/31 12:25:54 fabiankeil
66 * Flatten indentation in receive_client_request().
68 * Revision 1.217 2009/01/07 19:50:09 fabiankeil
69 * - If the socket-timeout has been reached and the client
70 * hasn't received any data yet, send an explanation before
71 * closing the connection.
72 * - In get_request_line(), signal timeouts the right way.
74 * Revision 1.216 2008/12/24 22:13:11 ler762
75 * fix GCC 3.4.4 warning
77 * Revision 1.215 2008/12/24 17:06:19 fabiankeil
78 * Keep a thread around to timeout alive connections
79 * even if no new requests are coming in.
81 * Revision 1.214 2008/12/20 14:53:55 fabiankeil
82 * Add config option socket-timeout to control the time
83 * Privoxy waits for data to arrive on a socket. Useful
84 * in case of stale ssh tunnels or when fuzz-testing.
86 * Revision 1.213 2008/12/15 18:45:51 fabiankeil
87 * When logging crunches, log the whole URL, so one can easily
88 * differentiate between vanilla HTTP and CONNECT requests.
90 * Revision 1.212 2008/12/14 15:46:22 fabiankeil
91 * Give crunched requests their own log level.
93 * Revision 1.211 2008/12/06 10:05:03 fabiankeil
94 * Downgrade "Received x bytes while expecting y." message to
95 * LOG_LEVEL_CONNECT as it doesn't necessarily indicate an error.
97 * Revision 1.210 2008/12/02 22:03:18 fabiankeil
98 * Don't miscalculate byte_count if we don't get all the
99 * server headers with one read_socket() call. With keep-alive
100 * support enabled, this caused delays until the server closed
103 * Revision 1.209 2008/11/27 09:44:04 fabiankeil
104 * Cosmetics for the last commit: Don't watch out for
105 * the last chunk if the content isn't chunk-encoded or
106 * if we already determined the content length previously.
108 * Revision 1.208 2008/11/26 18:24:17 fabiankeil
109 * Recognize that the server response is complete if the
110 * last chunk is read together with the server headers.
113 * Revision 1.207 2008/11/25 17:25:16 fabiankeil
114 * Don't convert the client-header list to text until we need to.
116 * Revision 1.206 2008/11/23 17:00:11 fabiankeil
117 * Some more chat() cosmetics.
119 * Revision 1.205 2008/11/16 12:43:49 fabiankeil
120 * Turn keep-alive support into a runtime feature
121 * that is disabled by setting keep-alive-timeout
122 * to a negative value.
124 * Revision 1.204 2008/11/06 19:42:17 fabiankeil
125 * Fix last-chunk detection hack to also apply
126 * if buf[] contains nothing but the last-chunk.
128 * Revision 1.203 2008/11/06 18:34:35 fabiankeil
129 * Factor receive_client_request() and
130 * parse_client_request() out of chat().
132 * Revision 1.202 2008/11/02 18:40:34 fabiankeil
133 * If we received a different amount of data than we expected,
134 * log a warning and make sure the server socket isn't reused.
136 * Revision 1.201 2008/11/02 16:48:20 fabiankeil
137 * Revert revision 1.195 and try again.
139 * Revision 1.200 2008/10/26 16:53:18 fabiankeil
142 * Revision 1.199 2008/10/26 15:36:10 fabiankeil
143 * Remove two debug messages with LOG_LEVEL_INFO.
145 * Revision 1.198 2008/10/22 15:19:55 fabiankeil
146 * Once More, With Feeling: if there is no logfile
147 * because the user didn't specify one, we shouldn't
148 * call init_error_log() after receiving SIGHUP either.
150 * Revision 1.197 2008/10/20 17:02:40 fabiankeil
151 * If SIGHUP is received while we aren't running in daemon
152 * mode, calling init_error_log() would be a mistake.
154 * Revision 1.196 2008/10/16 09:16:41 fabiankeil
155 * - Fix two gcc44 conversion warnings.
156 * - Don't bother logging the last five bytes
159 * Revision 1.195 2008/10/13 16:04:37 fabiankeil
160 * Make sure we don't try to reuse tainted server sockets.
162 * Revision 1.194 2008/10/12 18:35:18 fabiankeil
163 * The last commit was a bit too ambitious, apparently the content
164 * length adjustment is only necessary if we aren't buffering.
166 * Revision 1.193 2008/10/12 15:57:35 fabiankeil
167 * Fix content length calculation if we read headers
168 * and the start of the body at once. Now that we have
169 * FEATURE_CONNECTION_KEEP_ALIVE, it actually matters.
171 * Revision 1.192 2008/10/11 18:19:14 fabiankeil
172 * Even more chat() cosmetics.
174 * Revision 1.191 2008/10/11 18:00:14 fabiankeil
175 * Reformat some comments in chat().
177 * Revision 1.190 2008/10/11 14:58:00 fabiankeil
178 * In case of chunk-encoded content, stop reading if
179 * the buffer looks like it ends with the last chunk.
181 * Revision 1.189 2008/10/11 09:53:00 fabiankeil
182 * Let server_response_is_complete() deal properly with
183 * content that is neither buffered nor read all at once.
185 * Revision 1.188 2008/10/09 18:21:41 fabiankeil
186 * Flush work-in-progress changes to keep outgoing connections
187 * alive where possible. Incomplete and mostly #ifdef'd out.
189 * Revision 1.187 2008/09/07 12:35:05 fabiankeil
190 * Add mutex lock support for _WIN32.
192 * Revision 1.186 2008/09/04 08:13:58 fabiankeil
193 * Prepare for critical sections on Windows by adding a
194 * layer of indirection before the pthread mutex functions.
196 * Revision 1.185 2008/08/30 12:03:07 fabiankeil
197 * Remove FEATURE_COOKIE_JAR.
199 * Revision 1.184 2008/08/22 15:34:45 fabiankeil
200 * - Silence LLVM/Clang complaint.
201 * - Make received_hup_signal static.
202 * - Hide definitions for basedir, pidfile and received_hup_signal
203 * from __EMX__ as they only seem to be used in case of #ifdef unix.
205 * Revision 1.183 2008/08/21 07:09:35 fabiankeil
206 * Accept Shoutcast responses again. Problem reported
207 * and fix suggested by Stefan in #2062860.
209 * Revision 1.182 2008/06/27 11:13:56 fabiankeil
210 * Fix possible NULL-pointer dereference reported
211 * by din_a4 in #2003937. Pointy hat to me.
213 * Revision 1.181 2008/05/21 15:47:15 fabiankeil
214 * Streamline sed()'s prototype and declare
215 * the header parse and add structures static.
217 * Revision 1.180 2008/05/21 15:26:32 fabiankeil
218 * - Mark csp as immutable for send_crunch_response().
219 * - Fix comment spelling.
221 * Revision 1.179 2008/05/20 20:13:32 fabiankeil
222 * Factor update_server_headers() out of sed(), ditch the
223 * first_run hack and make server_patterns_light static.
225 * Revision 1.178 2008/05/10 13:23:38 fabiankeil
226 * Don't provide get_header() with the whole client state
227 * structure when it only needs access to csp->iob.
229 * Revision 1.177 2008/05/10 11:51:12 fabiankeil
230 * Make the "read the rest of the headers" loop a bit more readable.
232 * Revision 1.176 2008/05/10 11:37:57 fabiankeil
233 * - Instead of logging when the IIS5 hack is enabled, log when it fails.
234 * - Remove useless comment.
236 * Revision 1.175 2008/05/09 18:53:59 fabiankeil
237 * Fix comment grammar.
239 * Revision 1.174 2008/05/07 18:05:53 fabiankeil
240 * Remove the pointless buffer in client_protocol_is_unsupported().
242 * Revision 1.173 2008/05/06 15:09:00 fabiankeil
243 * Least-effort fix for bug #1821930 (reported by Lee):
244 * If the response doesn't look like HTTP,
245 * tell the client and log the problem.
247 * Revision 1.172 2008/04/16 16:38:21 fabiankeil
248 * Don't pass the whole csp structure to flush_socket()
249 * when it only needs a file descriptor and a buffer.
251 * Revision 1.171 2008/03/27 18:27:25 fabiankeil
252 * Remove kill-popups action.
254 * Revision 1.170 2008/03/06 16:33:46 fabiankeil
255 * If limit-connect isn't used, don't limit CONNECT requests to port 443.
257 * Revision 1.169 2008/03/04 18:30:39 fabiankeil
258 * Remove the treat-forbidden-connects-like-blocks action. We now
259 * use the "blocked" page for forbidden CONNECT requests by default.
261 * Revision 1.168 2008/03/02 12:25:25 fabiankeil
262 * Also use shiny new connect_port_is_forbidden() in jcc.c.
264 * Revision 1.167 2008/02/23 16:57:12 fabiankeil
265 * Rename url_actions() to get_url_actions() and let it
266 * use the standard parameter ordering.
268 * Revision 1.166 2008/02/23 16:33:43 fabiankeil
269 * Let forward_url() use the standard parameter ordering
270 * and mark its second parameter immutable.
272 * Revision 1.165 2008/02/02 19:36:56 fabiankeil
273 * Remove the "Listening ... for local connections only" log message.
274 * Whether or not remote connections are able to reach Privoxy is up
275 * to the operating system.
277 * Revision 1.164 2007/12/16 18:32:46 fabiankeil
278 * Prevent the log messages for CONNECT requests to unacceptable
279 * ports from printing the limit-connect argument as [null] if
280 * limit-connect hasn't been explicitly enabled.
282 * Revision 1.163 2007/12/13 01:47:11 david__schmidt
283 * Make sure all console-mode apps get a usage() instance
285 * Revision 1.162 2007/12/06 17:54:57 fabiankeil
286 * Reword NO_SERVER_DATA_RESPONSE to make it harder
287 * to misunderstand what the message is all about.
289 * Revision 1.161 2007/12/04 19:44:22 fabiankeil
290 * Unbreak trustfile which previously didn't work without
291 * FEATURE_TOGGLE. Fixes BR#1843585, reported by Lee.
293 * Revision 1.160 2007/11/29 18:00:29 fabiankeil
294 * Plug memory leak. Spotted by Valgrind, triggered by
295 * Privoxy-Regression-Test feeding proxyfuzz.py.
297 * Revision 1.159 2007/11/24 14:34:09 fabiankeil
298 * In the HTTP snipplets, refer to the client as client.
300 * Revision 1.158 2007/11/11 16:44:17 fabiankeil
301 * Emit a log message when activating the MS IIS5 hack.
303 * Revision 1.157 2007/11/03 17:34:49 fabiankeil
304 * Log the "weak randomization factor" warning only
305 * once for mingw32 and provide some more details.
307 * Revision 1.156 2007/11/01 18:20:58 fabiankeil
308 * Initialize log module after initializing mutexes, future
309 * deadlocks in that code should now work cross-platform.
311 * Revision 1.155 2007/10/23 20:12:45 fabiankeil
312 * Fix first CSUCCEED line to end in \r\n as required by RFC1945.
313 * Reported by Bert van Leeuwen in BR#1818808.
315 * Revision 1.154 2007/10/19 17:00:08 fabiankeil
316 * Downgrade "Flushing header and buffers" message to LOG_LEVEL_INFO.
318 * Revision 1.153 2007/10/14 14:12:41 fabiankeil
319 * When in daemon mode, close stderr after the configuration file has been
320 * parsed the first time. If logfile isn't set, stop logging. Fixes BR#897436.
322 * Revision 1.152 2007/10/04 18:03:34 fabiankeil
323 * - Fix a crash when parsing invalid requests whose first header
324 * is rejected by get_header(). Regression (re?)introduced
325 * in r1.143 by yours truly.
326 * - Move ACTION_VANILLA_WAFER handling into parsers.c's
327 * client_cookie_adder() to make sure send-vanilla-wafer can be
328 * controlled through tags (and thus regression-tested).
330 * Revision 1.151 2007/09/29 10:21:16 fabiankeil
331 * - Move get_filter_function() from jcc.c to filters.c
332 * so the filter functions can be static.
333 * - Don't bother filtering body-less responses.
335 * Revision 1.150 2007/09/28 16:39:29 fabiankeil
336 * Execute content filters through execute_content_filter().
338 * Revision 1.149 2007/09/04 15:08:48 fabiankeil
339 * Initialize req to NULL to make sure it's defined if the
340 * first read_socket() call fails. Reported by icmp30.
342 * Revision 1.148 2007/08/26 16:47:13 fabiankeil
343 * Add Stephen Gildea's --pre-chroot-nslookup patch [#1276666],
344 * extensive comments moved to user manual.
346 * Revision 1.147 2007/08/25 14:42:40 fabiankeil
347 * Don't crash if a broken header filter wiped out the request line.
349 * Revision 1.146 2007/08/20 17:09:32 fabiankeil
350 * Fix byte_count calculation in case of flushes
351 * and don't parse the server headers a second time.
353 * Revision 1.145 2007/08/19 13:13:31 fabiankeil
354 * - If there's a connection problem after we already forwarded
355 * parts of the original content, just hang up. Fixes BR#1776724.
356 * - Fix warnings about unused code on mingw32.
357 * - In case of flushes, calculate the byte count
358 * less incorrectly (I think).
360 * Revision 1.144 2007/08/11 14:43:22 fabiankeil
361 * Add some more prototypes for static functions.
363 * Revision 1.143 2007/08/05 13:58:19 fabiankeil
364 * Comment out request_contains_null_bytes() until it's used again.
366 * Revision 1.142 2007/08/05 13:50:26 fabiankeil
367 * #1763173 from Stefan Huehner: s@const static@static const@
368 * and declare some more functions static.
370 * Revision 1.141 2007/08/04 09:56:23 fabiankeil
371 * - Log rejected CONNECT requests with LOG_LEVEL_INFO
372 * and explain why they were rejected in the first place.
373 * - Fix the LOG_LEVEL_CLF message for crunches of unallowed
374 * CONNECT requests. The request line was missing.
375 * - Add two more XXX reminders as we don't have enough already.
377 * Revision 1.140 2007/07/21 11:51:36 fabiankeil
378 * As Hal noticed, checking dispatch_cgi() as the last cruncher
379 * looks like a bug if CGI requests are blocked unintentionally,
380 * so don't do it unless the user enabled the new config option
381 * "allow-cgi-request-crunching".
383 * Revision 1.139 2007/07/14 07:46:41 fabiankeil
384 * - Allow to rewrite the request destination behind the client's back.
385 * - Turn the weird-looking unconditional for loop that
386 * reads the client request into a conditional while loop.
387 * Move the stuff that only runs once out of the loop.
388 * - Move parts of chat(), server_content_type() and the
389 * necessary stuff to fix BR#1750917 into get_filter_function().
391 * Revision 1.138 2007/06/03 18:45:18 fabiankeil
392 * Temporary workaround for BR#1730105.
394 * Revision 1.137 2007/06/01 18:16:36 fabiankeil
395 * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
396 * deadlocks and crashes on OpenBSD and possibly other OS with neither
397 * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
398 * Thanks to Ralf Horstmann for report and solution.
400 * Revision 1.136 2007/06/01 16:41:11 fabiankeil
401 * Add forward-override{} to change the forwarding settings through
402 * action sections. This is mainly interesting to forward different
403 * clients differently (for example based on User-Agent or request
406 * Revision 1.135 2007/05/24 17:03:50 fabiankeil
407 * - Let usage() mention the --chroot parameter.
408 * - Use read_socket() consistently and always leave
409 * the last buffer byte alone, even in cases where
410 * null termination (currently) doesn't matter.
412 * Revision 1.134 2007/05/16 14:59:46 fabiankeil
413 * - Fix config file loading on Unix if no config file is specified.
414 * Since r1.97 Privoxy would always interpret the last argument as
415 * config file, even if it's a valid command line option.
416 * - Abort in case of unrecognized command line options. Closes #1719696.
417 * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
418 * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
420 * Revision 1.133 2007/05/04 11:23:19 fabiankeil
421 * - Don't rerun crunchers that only depend on the request URL.
422 * - Don't count redirects and CGI requests as "blocked requests".
424 * Revision 1.132 2007/04/25 15:15:17 fabiankeil
425 * Support crunching based on tags created by server-header taggers.
427 * Revision 1.131 2007/04/22 13:24:50 fabiankeil
428 * Make HTTP snippets static (again). Add a Content-Type for those
429 * with content so the browser doesn't guess it based on the URL.
431 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
432 * Move crunching and request line rebuilding out of chat().
434 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
435 * Introduce tags as alternative way to specify which
436 * actions apply to a request. At the moment tags can be
437 * created based on client and server headers.
439 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
440 * Don't CLF-log CONNECT requests twice.
442 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
443 * Log the source address for ACL-related connection drops.
445 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
446 * New config option: enforce-blocks.
448 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
449 * - Move null byte check into separate function.
450 * - Don't confuse the client with error pages
451 * if a CONNECT request was already confirmed.
453 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
454 * Speed up NULL byte escaping and only log the complete
455 * NULL byte requests with header debugging enabled.
457 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
458 * Answer requests that contain NULL bytes with
459 * a custom response instead of waiting for more
460 * data until the client eventually hangs up.
462 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
463 * - Move delivery and logging of crunched responses
464 * from chat() into send_crunch_response().
465 * - Display the reason for generating http_responses.
466 * - Log the content length for LOG_LEVEL_CLF correctly
467 * (still incorrect for some fixed responses).
468 * - Reword an incorrect comment about
469 * treat-forbidden-connects-like-blocks violating
471 * - Add some log messages.
473 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
474 * Move mutex initialization into separate
475 * function and exit in case of errors.
477 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
478 * - Start to reduce chat()'s line count and move
479 * parts of it into separate functions.
480 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
482 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
483 * - Add Proxy-Agent header to HTTP snippets that are
484 * supposed to reach HTTP clients only.
485 * - Made a few CONNECT log messages more descriptive.
486 * - Catch completely empty server responses (as seen
487 * with Tor's fake ".noconnect" top level domain).
488 * - Use shiny new "forwarding-failed" template for socks errors.
490 * Revision 1.118 2007/01/07 07:43:43 joergs
491 * AmigaOS4 support added.
493 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
494 * Added config option accept-intercepted-requests
495 * and disabled it by default.
497 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
498 * Reverted parts of my last commit
499 * to keep error handling working.
501 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
502 * Fixed gcc43 conversion warnings.
504 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
505 * Fix -pedantic ISO C warning about converting
506 * from function pointer to object pointer.
508 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
509 * Silence compiler warning I introduced with my last commit.
511 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
512 * Mutex protect rand() if POSIX threading
513 * is used, warn the user if that's not possible
514 * and stop using it on _WIN32 where it could
517 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
518 * Don't prevent core dumps by catching SIGABRT.
519 * It's rude and makes debugging unreasonable painful.
521 * Revision 1.110 2006/12/13 14:52:53 etresoft
522 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
524 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
525 * Privoxy is now able to run as intercepting
526 * proxy in combination with any packet filter
527 * that does the port redirection. The destination
528 * is extracted from the "Host:" header which
529 * should be available for nearly all requests.
531 * Moved HTTP snipplets into jcc.c.
532 * Added error message for gopher proxy requests.
534 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
535 * Only unlink the pidfile if it's actually used.
537 * Change order of interception checks to make
538 * it possible to block or redirect requests for
541 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
542 * Make pthread mutex locking more generic. Instead of
543 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
544 * and use mutex locking unless there is an _r function
545 * available. Better safe than sorry.
547 * Fixes "./configure --disable-pthread" and should result
548 * in less threading-related problems on pthread-using platforms,
549 * but it still doesn't fix BR#1122404.
551 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
552 * Move pthread.h inclusion from jcc.c to jcc.h.
553 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
555 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
556 * Don't exit after receiving the second SIGHUP on Solaris.
558 * Fixes BR 1052235, but the same problem may exist on other
559 * systems. Once 3.0.6 is out we should use sigset()
560 * where available and see if it breaks anything.
562 * Revision 1.104 2006/09/23 13:26:38 roro
563 * Replace TABs by spaces in source code.
565 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
566 * Fix +redirect{}. Didn't work with -fast-redirects.
568 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
569 * Respond with 400 and a short text message
570 * if the client tries to use Privoxy as FTP proxy.
572 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
573 * Make number of retries in case of forwarded-connect problems
574 * a config file option (forwarded-connect-retries) and use 0 as
577 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
578 * Set random(3) seed.
580 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
581 * Follow the OpenBSD port's lead and protect the resolve
582 * functions on OpenBSD as well.
584 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
585 * --user fix. Only use the user as group if no group is specified.
586 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
588 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
589 * Windows service (re-)integration
593 * --install[:service_name]
594 * --uninstall[:service_name]
597 * They work as follows:
598 * --install will create a service for you and then terminate.
599 * By default the service name will be "privoxy" (without the quotes).
600 * However you can run multiple services if you wish, just by adding
601 * a colon and then a name (no spaces).
603 * --uninstall follows the exact same rules a --install.
605 * --service is used when the program is executed by the service
606 * control manager, and in normal circumstances would never be
607 * used as a command line argument.
609 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
610 * Windows service integration
612 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
613 * Incorporate Fabian Keil's patch work:
614 http://www.fabiankeil.de/sourcecode/privoxy/
616 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
617 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
618 * with what was really the latest development (the v_3_0_branch branch)
620 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
621 * Thanks to Jindrich Makovicka for a race condition fix for the log
622 * file. The race condition remains for non-pthread implementations.
623 * Reference patch #1175720.
625 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
626 * Add the ability to check jpeg images for invalid
627 * lengths of comment blocks. Defensive strategy
628 * against the exploit:
629 * Microsoft Security Bulletin MS04-028
630 * Buffer Overrun in JPEG Processing (GDI+) Could
631 * Allow Code Execution (833987)
632 * Enabled with +inspect-jpegs in actions files.
634 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
635 * - Fixed usage info for non-unix platforms
636 * - Fixed small cmdline parsing bug
638 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
639 * Diagnostics: Now preserve the returncode of pthread_create
640 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
642 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
643 * No longer ignore SIGCHLD. Fixes bug #769381
645 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
646 * Close jarfile on graceful exit, remove stray line
648 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
649 * Cosmetics: Killed a warning, a typo and an allocation left at exit
651 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
652 * No longer rely on non-POSIX.1 extensions of getcwd().
655 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
656 * Replaced setenv() by posix-compliant putenv()
657 * Thanks to Neil McCalden (nmcc AT users.sf.net).
659 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
660 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
662 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
663 * Clean-up and extension of improvements for forked mode:
664 * - Child's return code now consists of flags RC_FLAG_*
665 * - Reporting toggle to parent now properly #ifdef'ed
666 * - Children now report blocking to parent. This enables
667 * statistics in forked mode
669 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
670 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
671 * Children now report having been toggled through _exit(17), parents
672 * watch for that code and toggle themselves if found.
674 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
675 * Wrapping all *_r functions (the non-_r versions of them) with
676 * mutex semaphores for OSX. Hopefully this will take care of all
677 * of those pesky crash reports.
679 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
680 * Fixed two mostly harmless mem leaks
682 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
683 * Fix: Head of global clients list now initialized to NULL
685 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
686 * Added basic support for OPTIONS and TRACE HTTP methods:
687 * - New interceptor direct_response() added in chat().
688 * - sed() moved to earlier in the process, so that the
689 * Host: header is evaluated before actions and forwarding
692 * Revision 1.92 2002/05/08 16:00:46 oes
693 * Chat's buffer handling:
694 * - Fixed bug with unchecked out-of-mem conditions
695 * while reading client request & server headers
696 * - No longer predict if the buffer limit will be exceeded
697 * in the next read -- check add_to_iob's new
698 * return code. If buffer couldn't be extended
699 * (policy or out-of-mem) while
700 * - reading from client: abort
701 * - reading server headers: send error page
702 * - buffering server body for filter: flush,
703 * and if that fails: send error page
705 * Revision 1.91 2002/04/08 20:35:58 swa
708 * Revision 1.90 2002/04/02 14:57:28 oes
709 * Made sending wafers independent of FEATURE_COOKIE_JAR
711 * Revision 1.89 2002/03/31 17:18:59 jongfoster
712 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
714 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
715 * More compiler warning message maintenance
717 * Revision 1.87 2002/03/26 22:29:54 swa
718 * we have a new homepage!
720 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
721 * Workaround for closing the jarfile before load_config() comes around again
723 * Revision 1.85 2002/03/24 15:23:33 jongfoster
726 * Revision 1.84 2002/03/24 13:25:43 swa
727 * name change related issues
729 * Revision 1.83 2002/03/16 23:54:06 jongfoster
730 * Adding graceful termination feature, to help look for memory leaks.
731 * If you enable this (which, by design, has to be done by hand
732 * editing config.h) and then go to http://i.j.b/die, then the program
733 * will exit cleanly after the *next* request. It should free all the
734 * memory that was used.
736 * Revision 1.82 2002/03/13 00:27:05 jongfoster
739 * Revision 1.81 2002/03/12 01:42:50 oes
740 * Introduced modular filters
742 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
743 * OS/2 port maintenance:
744 * - Fixed EMX build - it had decayed a little
745 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
746 * substituted a memset for now.
748 * Revision 1.79 2002/03/09 20:03:52 jongfoster
749 * - Making various functions return int rather than size_t.
750 * (Undoing a recent change). Since size_t is unsigned on
751 * Windows, functions like read_socket that return -1 on
752 * error cannot return a size_t.
754 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
755 * crashes, and also frequently caused JB to jump to 100%
756 * CPU and stay there. (Because it thought it had just
757 * read ((unsigned)-1) == 4Gb of data...)
759 * - The signature of write_socket has changed, it now simply
760 * returns success=0/failure=nonzero.
762 * - Trying to get rid of a few warnings --with-debug on
763 * Windows, I've introduced a new type "jb_socket". This is
764 * used for the socket file descriptors. On Windows, this
765 * is SOCKET (a typedef for unsigned). Everywhere else, it's
766 * an int. The error value can't be -1 any more, so it's
767 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
768 * Windows it maps to the #define INVALID_SOCKET.)
770 * - The signature of bind_port has changed.
772 * Revision 1.78 2002/03/08 21:35:04 oes
773 * Added optional group supplement to --user option. Will now use default group of user if no group given
775 * Revision 1.77 2002/03/07 03:52:06 oes
776 * - Fixed compiler warnings etc
777 * - Improved handling of failed DNS lookups
779 * Revision 1.76 2002/03/06 22:54:35 jongfoster
780 * Automated function-comment nitpicking.
782 * Revision 1.75 2002/03/06 10:02:19 oes
783 * Fixed stupid bug when --user was not given
785 * Revision 1.74 2002/03/06 00:49:31 jongfoster
786 * Fixing warning on Windows
787 * Making #ifdefs that refer to the same variable consistently
788 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
790 * Revision 1.73 2002/03/05 23:57:30 hal9
791 * Stray character 's' on line 1618 was breaking build.
793 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
794 * - Re-enable OS/2 building after new parms were added
795 * - Fix false out of memory report when resolving CGI templates when no IP
796 * address is available of failed attempt (a la no such domain)
798 * Revision 1.71 2002/03/05 18:13:56 oes
799 * Added --user option
801 * Revision 1.70 2002/03/05 04:52:42 oes
802 * Deleted non-errlog debugging code
804 * Revision 1.69 2002/03/04 23:50:00 jongfoster
805 * Splitting off bind_port() call into bind_port_helper(), with
808 * Revision 1.68 2002/03/04 20:17:32 oes
811 * Revision 1.67 2002/03/04 18:18:57 oes
812 * - Removed _DEBUG mode
813 * - Cleand up cmdline parsing
814 * - Introduced --no-daemon, --pidfile options
815 * - Cleaned up signal handling:
816 * - Terminate cleanly on INT, TERM and ABRT
817 * - Schedule logfile for re-opening on HUP
818 * - Ignore CHLD and PIPE
819 * - Leave the rest with their default handlers
820 * - Uniform handler registration
821 * - Added usage() function
822 * - Played styleguide police
824 * Revision 1.66 2002/03/03 15:06:55 oes
825 * Re-enabled automatic config reloading
827 * Revision 1.65 2002/03/03 14:49:11 oes
828 * Fixed CLF logging: Now uses client's original HTTP request
830 * Revision 1.64 2002/03/03 09:18:03 joergs
831 * Made jumbjuster work on AmigaOS again.
833 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
834 * Clean up a little CRLF unpleasantness that suddenly appeared
836 * Revision 1.62 2002/02/20 23:17:23 jongfoster
837 * Detecting some out-of memory conditions and exiting with a log message.
839 * Revision 1.61 2002/01/17 21:01:52 jongfoster
840 * Moving all our URL and URL pattern parsing code to urlmatch.c.
842 * Revision 1.60 2001/12/30 14:07:32 steudten
843 * - Add signal handling (unix)
844 * - Add SIGHUP handler (unix)
845 * - Add creation of pidfile (unix)
846 * - Add action 'top' in rc file (RH)
847 * - Add entry 'SIGNALS' to manpage
848 * - Add exit message to logfile (unix)
850 * Revision 1.59 2001/12/13 14:07:18 oes
851 * Fixed Bug: 503 error page now sent OK
853 * Revision 1.58 2001/11/30 23:37:24 jongfoster
854 * Renaming the Win32 config file to config.txt - this is almost the
855 * same as the corresponding UNIX name "config"
857 * Revision 1.57 2001/11/16 00:47:43 jongfoster
858 * Changing the tty-disconnection code to use setsid().
860 * Revision 1.56 2001/11/13 20:20:54 jongfoster
861 * Tabs->spaces, fixing a bug with missing {} around an if()
863 * Revision 1.55 2001/11/13 20:14:53 jongfoster
864 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
866 * Revision 1.54 2001/11/07 00:03:14 steudten
867 * Give reliable return value if an error
868 * occurs not just 0 with new daemon mode.
870 * Revision 1.53 2001/11/05 21:41:43 steudten
871 * Add changes to be a real daemon just for unix os.
872 * (change cwd to /, detach from controlling tty, set
873 * process group and session leader to the own process.
875 * Add some fatal-error log message for failed malloc().
876 * Add '-d' if compiled with 'configure --with-debug' to
877 * enable debug output.
879 * Revision 1.52 2001/10/26 20:11:20 jongfoster
880 * Fixing type mismatch
882 * Revision 1.51 2001/10/26 17:38:28 oes
885 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
886 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
887 * threads to call select() simultaneously. So, it's time to do a real, live,
888 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
889 * (native). Both versions will work, but using __OS2__ offers multi-threading.
891 * Revision 1.49 2001/10/23 21:41:35 jongfoster
892 * Added call to initialize the (statically-allocated of course)
893 * "out of memory" CGI response.
895 * Revision 1.48 2001/10/10 19:56:46 jongfoster
896 * Moving some code that wasn't cookie-related out of an #ifdef
899 * Revision 1.47 2001/10/10 16:44:36 oes
900 * Added CONNECT destination port limitation check
902 * Revision 1.46 2001/10/08 15:17:41 oes
903 * Re-enabled SSL forwarding
905 * Revision 1.45 2001/10/07 15:42:11 oes
906 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
908 * Moved downgrading of the HTTP version from parse_http_request to
909 * chat(), since we can't decide if it is necessary before we have
910 * determined the actions for the URL. The HTTP command is now
911 * *always* re-built so the repairs need no longer be special-cased.
913 * filter_popups now gets a csp pointer so it can raise the new
914 * CSP_FLAG_MODIFIED flag.
918 * Added configurable size limit for the IOB. If the IOB grows so
919 * large that the next read would exceed the limit, the header
920 * is generated, and the header & unfiltered buffer are flushed
921 * to the client. Chat then continues in non-buffering,
922 * non-filtering body mode.
924 * Revision 1.44 2001/10/02 18:13:57 oes
927 * Revision 1.43 2001/10/02 15:32:13 oes
928 * Moved generation of hdr
930 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
931 * Cleaning up 2 compiler warnings on OS/2.
933 * Revision 1.41 2001/09/16 17:05:14 jongfoster
934 * Removing unused #include showarg.h
936 * Revision 1.40 2001/09/16 15:41:45 jongfoster
937 * Fixing signed/unsigned comparison warning.
939 * Revision 1.39 2001/09/16 13:21:27 jongfoster
940 * Changes to use new list functions.
942 * Revision 1.38 2001/09/16 13:01:46 jongfoster
943 * Removing redundant function call that zeroed zalloc()'d memory.
945 * Revision 1.37 2001/09/10 11:12:24 oes
946 * Deleted unused variable
948 * Revision 1.36 2001/09/10 10:56:15 oes
949 * Silenced compiler warnings
951 * Revision 1.35 2001/07/31 14:44:22 oes
952 * Deleted unused size parameter from filter_popups()
954 * Revision 1.34 2001/07/30 22:08:36 jongfoster
955 * Tidying up #defines:
956 * - All feature #defines are now of the form FEATURE_xxx
957 * - Permanently turned off WIN_GUI_EDIT
958 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
960 * Revision 1.33 2001/07/29 19:32:00 jongfoster
961 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
963 * Revision 1.32 2001/07/29 18:47:05 jongfoster
964 * Adding missing #include "loadcfg.h"
966 * Revision 1.31 2001/07/29 12:17:48 oes
967 * Applied pthread fix by Paul Lieverse
969 * Revision 1.30 2001/07/25 22:57:13 jongfoster
970 * __BEOS__ no longer overrides FEATURE_PTHREAD.
971 * This is because FEATURE_PTHREAD will soon be widely used, so I
972 * want to keep it simple.
974 * Revision 1.29 2001/07/24 12:47:06 oes
975 * Applied BeOS support update by Eugenia
977 * Revision 1.28 2001/07/23 13:26:12 oes
978 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
980 * Revision 1.27 2001/07/19 19:09:47 haroon
981 * - Added code to take care of the situation where while processing the first
982 * server response (which includes the server header), after finding the end
983 * of the headers we were not looking past the end of the headers for
984 * content modification. I enabled it for filter_popups.
985 * Someone else should look to see if other similar operations should be
986 * done to the discarded portion of the buffer.
988 * Note 2001/07/20: No, the other content modification mechanisms will process
989 * the whole iob later anyway. --oes
991 * Revision 1.26 2001/07/18 12:31:36 oes
994 * Revision 1.25 2001/07/15 19:43:49 jongfoster
995 * Supports POSIX threads.
996 * Also removed some unused #includes.
998 * Revision 1.24 2001/07/13 14:00:40 oes
999 * - Generic content modification scheme:
1000 * Each feature has its own applicability flag that is set
1001 * from csp->action->flags.
1002 * Replaced the "filtering" int flag , by a function pointer
1003 * "content_filter" to the function that will do the content
1004 * modification. If it is != NULL, the document will be buffered
1005 * and processed through *content_filter, which must set
1006 * csp->content_length and return a modified copy of the body
1007 * or return NULL (on failiure).
1008 * - Changed csp->is_text to the more generic bitmap csp->content_type
1009 * which can currently take the valued CT_TEXT or CT_GIF
1010 * - Reformatting etc
1011 * - Removed all #ifdef PCRS
1013 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
1014 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
1015 * the `block_acl' call. This prevents a compilation error when the user
1016 * does not wish to use the "ACL" feature.
1018 * Revision 1.22 2001/06/29 21:45:41 oes
1019 * Indentation, CRLF->LF, Tab-> Space
1021 * Revision 1.21 2001/06/29 13:29:36 oes
1022 * - Cleaned up, improved comments
1023 * - Unified all possible interceptors (CGI,
1024 * block, trust, fast_redirect) in one
1025 * place, with one (CGI) answer generation
1026 * mechansim. Much clearer now.
1027 * - Removed the GIF image generation, which
1028 * is now done in filters.c:block_url()
1029 * - Made error conditions like domain lookup
1030 * failiure or (various) problems while talking
1031 * to the server use cgi.c:error_response()
1032 * instead of generating HTML/HTTP in chat() (yuck!)
1033 * - Removed logentry from cancelled commit
1035 * Revision 1.20 2001/06/09 10:55:28 jongfoster
1036 * Changing BUFSIZ ==> BUFFER_SIZE
1038 * Revision 1.19 2001/06/07 23:12:52 jongfoster
1039 * Replacing function pointer in struct gateway with a directly
1040 * called function forwarded_connect().
1041 * Replacing struct gateway with struct forward_spec
1043 * Revision 1.18 2001/06/03 19:12:16 oes
1044 * introduced new cgi handling
1046 * Revision 1.17 2001/06/01 20:07:23 jongfoster
1047 * Now uses action +image-blocker{} rather than config->tinygif
1049 * Revision 1.16 2001/06/01 18:49:17 jongfoster
1050 * Replaced "list_share" with "list" - the tiny memory gain was not
1051 * worth the extra complexity.
1053 * Revision 1.15 2001/05/31 21:24:47 jongfoster
1054 * Changed "permission" to "action" throughout.
1055 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
1056 * Moved vanilla wafer check into chat(), since we must now
1057 * decide whether or not to add it based on the URL.
1059 * Revision 1.14 2001/05/29 20:14:01 joergs
1060 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
1063 * Revision 1.13 2001/05/29 09:50:24 jongfoster
1064 * Unified blocklist/imagelist/permissionslist.
1065 * File format is still under discussion, but the internal changes
1066 * are (mostly) done.
1068 * Also modified interceptor behaviour:
1069 * - We now intercept all URLs beginning with one of the following
1070 * prefixes (and *only* these prefixes):
1072 * * http://ijbswa.sf.net/config/
1073 * * http://ijbswa.sourceforge.net/config/
1074 * - New interceptors "home page" - go to http://i.j.b/ to see it.
1075 * - Internal changes so that intercepted and fast redirect pages
1076 * are not replaced with an image.
1077 * - Interceptors now have the option to send a binary page direct
1078 * to the client. (i.e. ijb-send-banner uses this)
1079 * - Implemented show-url-info interceptor. (Which is why I needed
1080 * the above interceptors changes - a typical URL is
1081 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
1082 * The previous mechanism would not have intercepted that, and
1083 * if it had been intercepted then it then it would have replaced
1084 * it with an image.)
1086 * Revision 1.12 2001/05/27 22:17:04 oes
1088 * - re_process_buffer no longer writes the modified buffer
1089 * to the client, which was very ugly. It now returns the
1090 * buffer, which it is then written by chat.
1092 * - content_length now adjusts the Content-Length: header
1093 * for modified documents rather than crunch()ing it.
1094 * (Length info in csp->content_length, which is 0 for
1095 * unmodified documents)
1097 * - For this to work, sed() is called twice when filtering.
1099 * Revision 1.11 2001/05/26 17:27:53 jongfoster
1100 * Added support for CLF and fixed LOG_LEVEL_LOG.
1101 * Also did CRLF->LF fix of my previous patch.
1103 * Revision 1.10 2001/05/26 15:26:15 jongfoster
1104 * ACL feature now provides more security by immediately dropping
1105 * connections from untrusted hosts.
1107 * Revision 1.9 2001/05/26 00:28:36 jongfoster
1108 * Automatic reloading of config file.
1109 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
1110 * Most of the global variables have been moved to a new
1111 * struct configuration_spec, accessed through csp->config->globalname
1112 * Most of the globals remaining are used by the Win32 GUI.
1114 * Revision 1.8 2001/05/25 22:43:18 jongfoster
1115 * Fixing minor memory leak and buffer overflow.
1117 * Revision 1.7 2001/05/25 22:34:30 jongfoster
1120 * Revision 1.6 2001/05/23 00:13:58 joergs
1121 * AmigaOS support fixed.
1123 * Revision 1.5 2001/05/22 18:46:04 oes
1125 * - Enabled filtering banners by size rather than URL
1126 * by adding patterns that replace all standard banner
1127 * sizes with the "Junkbuster" gif to the re_filterfile
1129 * - Enabled filtering WebBugs by providing a pattern
1130 * which kills all 1x1 images
1132 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
1133 * which is selected by the (nonstandard and therefore
1134 * capital) letter 'U' in the option string.
1135 * It causes the quantifiers to be ungreedy by default.
1136 * Appending a ? turns back to greedy (!).
1138 * - Added a new interceptor ijb-send-banner, which
1139 * sends back the "Junkbuster" gif. Without imagelist or
1140 * MSIE detection support, or if tinygif = 1, or the
1141 * URL isn't recognized as an imageurl, a lame HTML
1142 * explanation is sent instead.
1144 * - Added new feature, which permits blocking remote
1145 * script redirects and firing back a local redirect
1147 * The feature is conditionally compiled, i.e. it
1148 * can be disabled with --disable-fast-redirects,
1149 * plus it must be activated by a "fast-redirects"
1150 * line in the config file, has its own log level
1151 * and of course wants to be displayed by show-proxy-args
1152 * Note: Boy, all the #ifdefs in 1001 locations and
1153 * all the fumbling with configure.in and acconfig.h
1154 * were *way* more work than the feature itself :-(
1156 * - Because a generic redirect template was needed for
1157 * this, tinygif = 3 now uses the same.
1159 * - Moved GIFs, and other static HTTP response templates
1162 * - Some minor fixes
1164 * - Removed some >400 CRs again (Jon, you really worked
1167 * Revision 1.4 2001/05/21 19:34:01 jongfoster
1168 * Made failure to bind() a fatal error.
1170 * Revision 1.3 2001/05/20 01:21:20 jongfoster
1171 * Version 2.9.4 checkin.
1172 * - Merged popupfile and cookiefile, and added control over PCRS
1173 * filtering, in new "permissionsfile".
1174 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
1175 * file error you now get a message box (in the Win32 GUI) rather
1176 * than the program exiting with no explanation.
1177 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
1179 * - Removed tabs from "config"
1180 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
1181 * - Bumped up version number.
1183 * Revision 1.2 2001/05/17 22:34:44 oes
1184 * - Added hint on GIF char array generation to jcc.c
1185 * - Cleaned CRLF's from the sources and related files
1186 * - Repaired logging for REF and FRC
1188 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
1189 * Initial import of version 2.9.3 source tree
1192 *********************************************************************/
1198 #include <sys/types.h>
1207 # ifndef FEATURE_PTHREAD
1211 # include <windows.h>
1212 # include <process.h>
1213 # endif /* ndef FEATURE_PTHREAD */
1216 # ifndef _WIN_CONSOLE
1217 # include "w32log.h"
1218 # endif /* ndef _WIN_CONSOLE */
1219 # include "w32svrapi.h"
1221 #else /* ifndef _WIN32 */
1223 # if !defined (__OS2__)
1224 # include <unistd.h>
1225 # include <sys/wait.h>
1226 # endif /* ndef __OS2__ */
1227 # include <sys/time.h>
1228 # include <sys/stat.h>
1229 # include <sys/ioctl.h>
1232 #include <sys/termios.h>
1240 # include <signal.h>
1243 # include <socket.h> /* BeOS has select() for sockets only. */
1244 # include <OS.h> /* declarations for threads and stuff. */
1247 # if defined(__EMX__) || defined(__OS2__)
1248 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
1253 #define bzero(B,N) memset(B,0x00,n)
1257 # include <select.h>
1262 #include "project.h"
1265 #include "filters.h"
1266 #include "loaders.h"
1267 #include "parsers.h"
1268 #include "miscutil.h"
1270 #include "jbsockets.h"
1271 #include "gateway.h"
1272 #include "actions.h"
1274 #include "loadcfg.h"
1275 #include "urlmatch.h"
1277 const char jcc_h_rcs[] = JCC_H_VERSION;
1278 const char project_h_rcs[] = PROJECT_H_VERSION;
1281 struct client_state clients[1];
1282 struct file_list files[1];
1284 #ifdef FEATURE_STATISTICS
1285 int urls_read = 0; /* total nr of urls read inc rejected */
1286 int urls_rejected = 0; /* total nr of urls rejected */
1287 #endif /* def FEATURE_STATISTICS */
1289 #ifdef FEATURE_GRACEFUL_TERMINATION
1290 int g_terminate = 0;
1293 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1294 static void sig_handler(int the_signal);
1296 static int client_protocol_is_unsupported(const struct client_state *csp, char *req);
1297 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
1298 static jb_err get_server_headers(struct client_state *csp);
1299 static const char *crunch_reason(const struct http_response *rsp);
1300 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp);
1301 static char *get_request_line(struct client_state *csp);
1302 static jb_err receive_client_request(struct client_state *csp);
1303 static jb_err parse_client_request(struct client_state *csp);
1304 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
1305 static jb_err change_request_destination(struct client_state *csp);
1306 static void chat(struct client_state *csp);
1307 static void serve(struct client_state *csp);
1308 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1309 static void usage(const char *myname);
1311 static void initialize_mutexes(void);
1312 static jb_socket bind_port_helper(struct configuration_spec *config);
1313 static void listen_loop(void);
1316 void serve(struct client_state *csp);
1317 #else /* ifndef AMIGA */
1318 static void serve(struct client_state *csp);
1319 #endif /* def AMIGA */
1322 static int32 server_thread(void *data);
1323 #endif /* def __BEOS__ */
1326 #define sleep(N) Sleep(((N) * 1000))
1330 #define sleep(N) DosSleep(((N) * 100))
1333 #ifdef MUTEX_LOCKS_AVAILABLE
1335 * XXX: Does the locking stuff really belong in this file?
1337 privoxy_mutex_t log_mutex;
1338 privoxy_mutex_t log_init_mutex;
1339 privoxy_mutex_t connection_reuse_mutex;
1341 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
1342 privoxy_mutex_t resolver_mutex;
1343 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
1345 #ifndef HAVE_GMTIME_R
1346 privoxy_mutex_t gmtime_mutex;
1347 #endif /* ndef HAVE_GMTIME_R */
1349 #ifndef HAVE_LOCALTIME_R
1350 privoxy_mutex_t localtime_mutex;
1351 #endif /* ndef HAVE_GMTIME_R */
1354 privoxy_mutex_t rand_mutex;
1355 #endif /* ndef HAVE_RANDOM */
1357 #endif /* def MUTEX_LOCKS_AVAILABLE */
1360 const char *basedir = NULL;
1361 const char *pidfile = NULL;
1362 static int received_hup_signal = 0;
1363 #endif /* defined unix */
1365 /* HTTP snipplets. */
1366 static const char CSUCCEED[] =
1367 "HTTP/1.0 200 Connection established\r\n"
1368 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
1370 static const char CHEADER[] =
1371 "HTTP/1.0 400 Invalid header received from client\r\n"
1372 "Proxy-Agent: Privoxy " VERSION "\r\n"
1373 "Content-Type: text/plain\r\n"
1374 "Connection: close\r\n\r\n"
1375 "Invalid header received from client.\r\n";
1377 static const char FTP_RESPONSE[] =
1378 "HTTP/1.0 400 Invalid request received from client\r\n"
1379 "Content-Type: text/plain\r\n"
1380 "Connection: close\r\n\r\n"
1381 "Invalid request. Privoxy doesn't support FTP.\r\n";
1383 static const char GOPHER_RESPONSE[] =
1384 "HTTP/1.0 400 Invalid request received from client\r\n"
1385 "Content-Type: text/plain\r\n"
1386 "Connection: close\r\n\r\n"
1387 "Invalid request. Privoxy doesn't support gopher.\r\n";
1389 /* XXX: should be a template */
1390 static const char MISSING_DESTINATION_RESPONSE[] =
1391 "HTTP/1.0 400 Bad request received from client\r\n"
1392 "Proxy-Agent: Privoxy " VERSION "\r\n"
1393 "Content-Type: text/plain\r\n"
1394 "Connection: close\r\n\r\n"
1395 "Bad request. Privoxy was unable to extract the destination.\r\n";
1397 /* XXX: should be a template */
1398 static const char NO_SERVER_DATA_RESPONSE[] =
1399 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1400 "Proxy-Agent: Privoxy " VERSION "\r\n"
1401 "Content-Type: text/plain\r\n"
1402 "Connection: close\r\n\r\n"
1403 "Empty server or forwarder response.\r\n"
1404 "The connection has been closed but Privoxy didn't receive any data.\r\n";
1406 /* XXX: should be a template */
1407 static const char INVALID_SERVER_HEADERS_RESPONSE[] =
1408 "HTTP/1.0 502 Server or forwarder response invalid\r\n"
1409 "Proxy-Agent: Privoxy " VERSION "\r\n"
1410 "Content-Type: text/plain\r\n"
1411 "Connection: close\r\n\r\n"
1412 "Bad response. The server or forwarder response doesn't look like HTTP.\r\n";
1415 /* XXX: should be a template */
1416 static const char NULL_BYTE_RESPONSE[] =
1417 "HTTP/1.0 400 Bad request received from client\r\n"
1418 "Proxy-Agent: Privoxy " VERSION "\r\n"
1419 "Content-Type: text/plain\r\n"
1420 "Connection: close\r\n\r\n"
1421 "Bad request. Null byte(s) before end of request.\r\n";
1424 /* XXX: should be a template */
1425 static const char MESSED_UP_REQUEST_RESPONSE[] =
1426 "HTTP/1.0 400 Malformed request after rewriting\r\n"
1427 "Proxy-Agent: Privoxy " VERSION "\r\n"
1428 "Content-Type: text/plain\r\n"
1429 "Connection: close\r\n\r\n"
1430 "Bad request. Messed up with header filters.\r\n";
1432 /* XXX: should be a template */
1433 static const char CONNECTION_TIMEOUT_RESPONSE[] =
1434 "HTTP/1.0 502 Connection timeout\r\n"
1435 "Proxy-Agent: Privoxy " VERSION "\r\n"
1436 "Content-Type: text/plain\r\n"
1437 "Connection: close\r\n\r\n"
1438 "The connection timed out.\r\n";
1440 /* A function to crunch a response */
1441 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
1443 /* Crunch function flags */
1444 #define CF_NO_FLAGS 0
1445 /* Cruncher applies to forced requests as well */
1446 #define CF_IGNORE_FORCE 1
1447 /* Crunched requests are counted for the block statistics */
1448 #define CF_COUNT_AS_REJECT 2
1450 /* A crunch function and its flags */
1453 const crunch_func_ptr cruncher;
1457 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
1459 /* Complete list of cruncher functions */
1460 static const struct cruncher crunchers_all[] = {
1461 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
1462 { block_url, CF_COUNT_AS_REJECT },
1463 #ifdef FEATURE_TRUST
1464 { trust_url, CF_COUNT_AS_REJECT },
1465 #endif /* def FEATURE_TRUST */
1466 { redirect_url, CF_NO_FLAGS },
1467 { dispatch_cgi, CF_IGNORE_FORCE},
1471 /* Light version, used after tags are applied */
1472 static const struct cruncher crunchers_light[] = {
1473 { block_url, CF_COUNT_AS_REJECT },
1474 { redirect_url, CF_NO_FLAGS },
1480 * XXX: Don't we really mean
1486 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1487 /*********************************************************************
1489 * Function : sig_handler
1491 * Description : Signal handler for different signals.
1492 * Exit gracefully on TERM and INT
1493 * or set a flag that will cause the errlog
1494 * to be reopened by the main thread on HUP.
1497 * 1 : the_signal = the signal cause this function to call
1501 *********************************************************************/
1502 static void sig_handler(int the_signal)
1508 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1520 received_hup_signal = 1;
1526 * We shouldn't be here, unless we catch signals
1527 * in main() that we can't handle here!
1529 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1537 /*********************************************************************
1539 * Function : client_protocol_is_unsupported
1541 * Description : Checks if the client used a known unsupported
1542 * protocol and deals with it by sending an error
1546 * 1 : csp = Current client state (buffers, headers, etc...)
1547 * 2 : req = the first request line send by the client
1549 * Returns : TRUE if an error response has been generated, or
1550 * FALSE if the request doesn't look invalid.
1552 *********************************************************************/
1553 static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1556 * If it's a FTP or gopher request, we don't support it.
1558 * These checks are better than nothing, but they might
1559 * not work in all configurations and some clients might
1560 * have problems digesting the answer.
1562 * They should, however, never cause more problems than
1563 * Privoxy's old behaviour (returning the misleading HTML
1566 * "Could not resolve http://(ftp|gopher)://example.org").
1568 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1570 const char *response = NULL;
1571 const char *protocol = NULL;
1573 if (!strncmpic(req, "GET ftp://", 10))
1575 response = FTP_RESPONSE;
1580 response = GOPHER_RESPONSE;
1581 protocol = "GOPHER";
1583 log_error(LOG_LEVEL_ERROR,
1584 "%s tried to use Privoxy as %s proxy: %s",
1585 csp->ip_addr_str, protocol, req);
1586 log_error(LOG_LEVEL_CLF,
1587 "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1589 write_socket(csp->cfd, response, strlen(response));
1598 /*********************************************************************
1600 * Function : get_request_destination_elsewhere
1602 * Description : If the client's request was redirected into
1603 * Privoxy without the client's knowledge,
1604 * the request line lacks the destination host.
1606 * This function tries to get it elsewhere,
1607 * provided accept-intercepted-requests is enabled.
1609 * "Elsewhere" currently only means "Host: header",
1610 * but in the future we may ask the redirecting
1611 * packet filter to look the destination up.
1613 * If the destination stays unknown, an error
1614 * response is send to the client and headers
1615 * are freed so that chat() can return directly.
1618 * 1 : csp = Current client state (buffers, headers, etc...)
1619 * 2 : headers = a header list
1621 * Returns : JB_ERR_OK if the destination is now known, or
1622 * JB_ERR_PARSE if it isn't.
1624 *********************************************************************/
1625 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1629 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1631 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1632 " Privoxy isn't configured to accept intercepted requests.",
1633 csp->ip_addr_str, csp->http->cmd);
1634 /* XXX: Use correct size */
1635 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1636 csp->ip_addr_str, csp->http->cmd);
1638 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1639 destroy_list(headers);
1641 return JB_ERR_PARSE;
1643 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1645 /* Split the domain we just got for pattern matching */
1646 init_domain_components(csp->http);
1652 /* We can't work without destination. Go spread the news.*/
1654 req = list_to_text(headers);
1656 /* XXX: Use correct size */
1657 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1658 csp->ip_addr_str, csp->http->cmd);
1659 log_error(LOG_LEVEL_ERROR,
1660 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1661 csp->ip_addr_str, csp->http->cmd, req);
1664 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
1665 destroy_list(headers);
1667 return JB_ERR_PARSE;
1670 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1671 * to get the destination IP address, use it as host directly
1672 * or do a reverse DNS lookup first.
1677 /*********************************************************************
1679 * Function : get_server_headers
1681 * Description : Parses server headers in iob and fills them
1682 * into csp->headers so that they can later be
1686 * 1 : csp = Current client state (buffers, headers, etc...)
1688 * Returns : JB_ERR_OK if everything went fine, or
1689 * JB_ERR_PARSE if the headers were incomplete.
1691 *********************************************************************/
1692 static jb_err get_server_headers(struct client_state *csp)
1694 int continue_hack_in_da_house = 0;
1697 while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
1702 * continue hack in da house. Ignore the ending of
1703 * this head and continue enlisting header lines.
1704 * The reason is described below.
1706 enlist(csp->headers, "");
1707 continue_hack_in_da_house = 0;
1710 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1713 * It's a bodyless continue response, don't
1714 * stop header parsing after reaching its end.
1716 * As a result Privoxy will concatenate the
1717 * next response's head and parse and deliver
1718 * the headers as if they belonged to one request.
1720 * The client will separate them because of the
1721 * empty line between them.
1723 * XXX: What we're doing here is clearly against
1724 * the intended purpose of the continue header,
1725 * and under some conditions (HTTP/1.0 client request)
1726 * it's a standard violation.
1728 * Anyway, "sort of against the spec" is preferable
1729 * to "always getting confused by Continue responses"
1730 * (Privoxy's behaviour before this hack was added)
1732 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1733 continue_hack_in_da_house = 1;
1735 else if (*header == '\0')
1738 * If the header is empty, but the Continue hack
1739 * isn't active, we can assume that we reached the
1740 * end of the buffer before we hit the end of the
1743 * Inform the caller an let it decide how to handle it.
1745 return JB_ERR_PARSE;
1748 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1751 * XXX: Should we quit the request and return a
1752 * out of memory error page instead?
1754 log_error(LOG_LEVEL_ERROR,
1755 "Out of memory while enlisting server headers. %s lost.",
1765 /*********************************************************************
1767 * Function : crunch_reason
1769 * Description : Translates the crunch reason code into a string.
1772 * 1 : rsp = a http_response
1774 * Returns : A string with the crunch reason or an error description.
1776 *********************************************************************/
1777 static const char *crunch_reason(const struct http_response *rsp)
1779 char * reason = NULL;
1781 assert(rsp != NULL);
1784 return "Internal error while searching for crunch reason";
1787 switch (rsp->reason)
1789 case RSP_REASON_UNSUPPORTED:
1790 reason = "Unsupported HTTP feature";
1792 case RSP_REASON_BLOCKED:
1795 case RSP_REASON_UNTRUSTED:
1796 reason = "Untrusted";
1798 case RSP_REASON_REDIRECTED:
1799 reason = "Redirected";
1801 case RSP_REASON_CGI_CALL:
1802 reason = "CGI Call";
1804 case RSP_REASON_NO_SUCH_DOMAIN:
1805 reason = "DNS failure";
1807 case RSP_REASON_FORWARDING_FAILED:
1808 reason = "Forwarding failed";
1810 case RSP_REASON_CONNECT_FAILED:
1811 reason = "Connection failure";
1813 case RSP_REASON_OUT_OF_MEMORY:
1814 reason = "Out of memory (may mask other reasons)";
1817 reason = "No reason recorded";
1825 /*********************************************************************
1827 * Function : send_crunch_response
1829 * Description : Delivers already prepared response for
1830 * intercepted requests, logs the interception
1831 * and frees the response.
1834 * 1 : csp = Current client state (buffers, headers, etc...)
1835 * 1 : rsp = Fully prepared response. Will be freed on exit.
1837 * Returns : Nothing.
1839 *********************************************************************/
1840 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp)
1842 const struct http_request *http = csp->http;
1843 char status_code[4];
1845 assert(rsp != NULL);
1846 assert(rsp->head != NULL);
1851 * Not supposed to happen. If it does
1852 * anyway, treat it as an unknown error.
1854 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1855 /* return code doesn't matter */
1860 /* If rsp is still NULL, we have serious internal problems. */
1861 log_error(LOG_LEVEL_FATAL,
1862 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1866 * Extract the status code from the actual head
1867 * that was send to the client. It is the only
1868 * way to get it right for all requests, including
1869 * the fixed ones for out-of-memory problems.
1871 * A head starts like this: 'HTTP/1.1 200...'
1875 status_code[0] = rsp->head[9];
1876 status_code[1] = rsp->head[10];
1877 status_code[2] = rsp->head[11];
1878 status_code[3] = '\0';
1880 /* Write the answer to the client */
1881 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1882 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1884 /* There is nothing we can do about it. */
1885 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1888 /* Log that the request was crunched and why. */
1889 log_error(LOG_LEVEL_CRUNCH, "%s: %s", crunch_reason(rsp), http->url);
1890 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %d",
1891 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1893 /* Clean up and return */
1894 if (cgi_error_memory() != rsp)
1896 free_http_response(rsp);
1903 /*********************************************************************
1905 * Function : request_contains_null_bytes
1907 * Description : Checks for NULL bytes in the request and sends
1908 * an error message to the client if any were found.
1910 * XXX: currently not used, see comment in chat().
1913 * 1 : csp = Current client state (buffers, headers, etc...)
1914 * 2 : buf = Data from the client's request to check.
1915 * 3 : len = The data length.
1917 * Returns : TRUE if the request contained one or more NULL bytes, or
1920 *********************************************************************/
1921 static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1923 size_t c_len; /* Request lenght when treated as C string */
1925 c_len = strlen(buf);
1930 * Null byte(s) found. Log the request,
1931 * return an error response and hang up.
1933 size_t tmp_len = c_len;
1938 * Replace NULL byte(s) with '°' characters
1939 * so the request can be logged as string.
1940 * XXX: Is there a better replacement character?
1943 tmp_len += strlen(buf+tmp_len);
1944 } while (tmp_len < len);
1946 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1947 "(length=%d, strlen=%d).", csp->ip_addr_str, len, c_len);
1948 log_error(LOG_LEVEL_HEADER,
1949 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1951 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
1953 /* XXX: Log correct size */
1954 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1964 /*********************************************************************
1966 * Function : crunch_response_triggered
1968 * Description : Checks if the request has to be crunched,
1969 * and delivers the crunch response if necessary.
1972 * 1 : csp = Current client state (buffers, headers, etc...)
1973 * 2 : crunchers = list of cruncher functions to run
1975 * Returns : TRUE if the request was answered with a crunch response
1978 *********************************************************************/
1979 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
1981 struct http_response *rsp = NULL;
1982 const struct cruncher *c;
1985 * If CGI request crunching is disabled,
1986 * check the CGI dispatcher out of order to
1987 * prevent unintentional blocks or redirects.
1989 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
1990 && (NULL != (rsp = dispatch_cgi(csp))))
1992 /* Deliver, log and free the interception response. */
1993 send_crunch_response(csp, rsp);
1997 for (c = crunchers; c->cruncher != NULL; c++)
2000 * Check the cruncher if either Privoxy is toggled
2001 * on and the request isn't forced, or if the cruncher
2002 * applies to forced requests as well.
2004 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
2005 !(csp->flags & CSP_FLAG_FORCED)) ||
2006 (c->flags & CF_IGNORE_FORCE))
2008 rsp = c->cruncher(csp);
2011 /* Deliver, log and free the interception response. */
2012 send_crunch_response(csp, rsp);
2013 #ifdef FEATURE_STATISTICS
2014 if (c->flags & CF_COUNT_AS_REJECT)
2016 csp->flags |= CSP_FLAG_REJECTED;
2018 #endif /* def FEATURE_STATISTICS */
2029 /*********************************************************************
2031 * Function : build_request_line
2033 * Description : Builds the HTTP request line.
2035 * If a HTTP forwarder is used it expects the whole URL,
2036 * web servers only get the path.
2039 * 1 : csp = Current client state (buffers, headers, etc...)
2040 * 2 : fwd = The forwarding spec used for the request
2041 * XXX: Should use http->fwd instead.
2042 * 3 : request_line = The old request line which will be replaced.
2044 * Returns : Nothing. Terminates in case of memory problems.
2046 *********************************************************************/
2047 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
2049 struct http_request *http = csp->http;
2051 assert(http->ssl == 0);
2054 * Downgrade http version from 1.1 to 1.0
2055 * if +downgrade action applies.
2057 if ( (csp->action->flags & ACTION_DOWNGRADE)
2058 && (!strcmpic(http->ver, "HTTP/1.1")))
2061 http->ver = strdup("HTTP/1.0");
2063 if (http->ver == NULL)
2065 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
2070 * Rebuild the request line.
2072 freez(*request_line);
2073 *request_line = strdup(http->gpc);
2074 string_append(request_line, " ");
2076 if (fwd->forward_host)
2078 string_append(request_line, http->url);
2082 string_append(request_line, http->path);
2084 string_append(request_line, " ");
2085 string_append(request_line, http->ver);
2087 if (*request_line == NULL)
2089 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
2091 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
2095 /*********************************************************************
2097 * Function : change_request_destination
2099 * Description : Parse a (rewritten) request line and regenerate
2100 * the http request data.
2103 * 1 : csp = Current client state (buffers, headers, etc...)
2105 * Returns : Forwards the parse_http_request() return code.
2106 * Terminates in case of memory problems.
2108 *********************************************************************/
2109 static jb_err change_request_destination(struct client_state *csp)
2111 struct http_request *http = csp->http;
2114 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
2115 free_http_request(http);
2116 err = parse_http_request(csp->headers->first->str, http, csp);
2117 if (JB_ERR_OK != err)
2119 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
2120 jb_err_to_string(err));
2124 /* XXX: ocmd is a misleading name */
2125 http->ocmd = strdup(http->cmd);
2126 if (http->ocmd == NULL)
2128 log_error(LOG_LEVEL_FATAL,
2129 "Out of memory copying rewritten HTTP request line");
2137 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2138 /*********************************************************************
2140 * Function : server_response_is_complete
2142 * Description : Determines whether we should stop reading
2143 * from the server socket.
2146 * 1 : csp = Current client state (buffers, headers, etc...)
2147 * 2 : content_length = Length of content received so far.
2149 * Returns : TRUE if the response is complete,
2152 *********************************************************************/
2153 static int server_response_is_complete(struct client_state *csp, size_t content_length)
2155 int content_length_known = (csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
2157 if (!strcmpic(csp->http->gpc, "HEAD"))
2160 * "HEAD" implies no body, we are thus expecting
2161 * no content. XXX: incomplete "list" of methods?
2163 csp->expected_content_length = 0;
2164 content_length_known = TRUE;
2167 if (csp->http->status == 304)
2170 * Expect no body. XXX: incomplete "list" of status codes?
2172 csp->expected_content_length = 0;
2173 content_length_known = TRUE;
2176 return (content_length_known && ((0 == csp->expected_content_length)
2177 || (csp->expected_content_length <= content_length)));
2181 /*********************************************************************
2183 * Function : wait_for_alive_connections
2185 * Description : Waits for alive connections to timeout.
2191 *********************************************************************/
2192 static void wait_for_alive_connections()
2194 int connections_alive = close_unusable_connections();
2196 while (0 < connections_alive)
2198 log_error(LOG_LEVEL_CONNECT,
2199 "Waiting for %d connections to timeout.",
2202 connections_alive = close_unusable_connections();
2205 log_error(LOG_LEVEL_CONNECT, "No connections to wait for left.");
2208 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2211 /*********************************************************************
2213 * Function : mark_server_socket_tainted
2215 * Description : Makes sure we don't reuse a server socket
2216 * (if we didn't read everything the server sent
2217 * us reusing the socket would lead to garbage).
2220 * 1 : csp = Current client state (buffers, headers, etc...)
2224 *********************************************************************/
2225 static void mark_server_socket_tainted(struct client_state *csp)
2227 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
2229 log_error(LOG_LEVEL_CONNECT, "Unsetting keep-alive flag.");
2230 csp->flags &= ~CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE;
2234 /*********************************************************************
2236 * Function : get_request_line
2238 * Description : Read the client request line.
2241 * 1 : csp = Current client state (buffers, headers, etc...)
2243 * Returns : Pointer to request line or NULL in case of errors.
2245 *********************************************************************/
2246 static char *get_request_line(struct client_state *csp)
2248 char buf[BUFFER_SIZE];
2249 char *request_line = NULL;
2252 memset(buf, 0, sizeof(buf));
2256 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
2258 log_error(LOG_LEVEL_ERROR,
2259 "Stopped waiting for the request line.");
2260 write_socket(csp->cfd, CONNECTION_TIMEOUT_RESPONSE,
2261 strlen(CONNECTION_TIMEOUT_RESPONSE));
2265 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2267 if (len <= 0) return NULL;
2270 * If there is no memory left for buffering the
2271 * request, there is nothing we can do but hang up
2273 if (add_to_iob(csp, buf, len))
2278 request_line = get_header(csp->iob);
2280 } while ((NULL != request_line) && ('\0' == *request_line));
2282 return request_line;
2287 /*********************************************************************
2289 * Function : receive_client_request
2291 * Description : Read the client's request (more precisely the
2292 * client headers) and answer it if necessary.
2294 * Note that since we're not using select() we could get
2295 * blocked here if a client connected, then didn't say
2299 * 1 : csp = Current client state (buffers, headers, etc...)
2301 * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
2303 *********************************************************************/
2304 static jb_err receive_client_request(struct client_state *csp)
2306 char buf[BUFFER_SIZE];
2309 struct http_request *http;
2313 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
2314 struct list header_list;
2315 struct list *headers = &header_list;
2319 memset(buf, 0, sizeof(buf));
2321 req = get_request_line(csp);
2324 return JB_ERR_PARSE;
2326 assert(*req != '\0');
2328 if (client_protocol_is_unsupported(csp, req))
2330 return JB_ERR_PARSE;
2333 #ifdef FEATURE_FORCE_LOAD
2335 * If this request contains the FORCE_PREFIX and blocks
2336 * aren't enforced, get rid of it and set the force flag.
2338 if (strstr(req, FORCE_PREFIX))
2340 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
2342 log_error(LOG_LEVEL_FORCE,
2343 "Ignored force prefix in request: \"%s\".", req);
2347 strclean(req, FORCE_PREFIX);
2348 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
2349 csp->flags |= CSP_FLAG_FORCED;
2352 #endif /* def FEATURE_FORCE_LOAD */
2354 err = parse_http_request(req, http, csp);
2356 if (JB_ERR_OK != err)
2358 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
2359 /* XXX: Use correct size */
2360 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2361 log_error(LOG_LEVEL_ERROR,
2362 "Couldn't parse request line received from %s: %s",
2363 csp->ip_addr_str, jb_err_to_string(err));
2365 free_http_request(http);
2366 return JB_ERR_PARSE;
2369 /* grab the rest of the client's headers */
2373 p = get_header(csp->iob);
2377 /* There are no additional headers to read. */
2384 * We didn't receive a complete header
2385 * line yet, get the rest of it.
2387 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
2389 log_error(LOG_LEVEL_ERROR,
2390 "Stopped grabbing the client headers.");
2391 return JB_ERR_PARSE;
2394 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2397 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
2398 destroy_list(headers);
2399 return JB_ERR_PARSE;
2402 if (add_to_iob(csp, buf, len))
2405 * If there is no memory left for buffering the
2406 * request, there is nothing we can do but hang up
2408 destroy_list(headers);
2409 return JB_ERR_MEMORY;
2415 * We were able to read a complete
2416 * header and can finaly enlist it.
2423 if (http->host == NULL)
2426 * If we still don't know the request destination,
2427 * the request is invalid or the client uses
2428 * Privoxy without its knowledge.
2430 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
2433 * Our attempts to get the request destination
2434 * elsewhere failed or Privoxy is configured
2435 * to only accept proxy requests.
2437 * An error response has already been send
2438 * and we're done here.
2440 return JB_ERR_PARSE;
2445 * Determine the actions for this URL
2447 #ifdef FEATURE_TOGGLE
2448 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
2450 /* Most compatible set of actions (i.e. none) */
2451 init_current_action(csp->action);
2454 #endif /* ndef FEATURE_TOGGLE */
2456 get_url_actions(csp, http);
2460 * Save a copy of the original request for logging
2462 http->ocmd = strdup(http->cmd);
2463 if (http->ocmd == NULL)
2465 log_error(LOG_LEVEL_FATAL,
2466 "Out of memory copying HTTP request line");
2468 enlist(csp->headers, http->cmd);
2470 /* Append the previously read headers */
2471 list_append_list_unique(csp->headers, headers);
2472 destroy_list(headers);
2479 /*********************************************************************
2481 * Function : parse_client_request
2483 * Description : Parses the client's request and decides what to do
2486 * Note that since we're not using select() we could get
2487 * blocked here if a client connected, then didn't say
2491 * 1 : csp = Current client state (buffers, headers, etc...)
2493 * Returns : JB_ERR_OK or JB_ERR_PARSE
2495 *********************************************************************/
2496 static jb_err parse_client_request(struct client_state *csp)
2498 struct http_request *http = csp->http;
2501 err = sed(csp, FILTER_CLIENT_HEADERS);
2502 if (JB_ERR_OK != err)
2504 /* XXX: Should be handled in sed(). */
2505 assert(err == JB_ERR_PARSE);
2506 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers.");
2508 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2510 /* Check request line for rewrites. */
2511 if ((NULL == csp->headers->first->str)
2512 || (strcmp(http->cmd, csp->headers->first->str) &&
2513 (JB_ERR_OK != change_request_destination(csp))))
2516 * A header filter broke the request line - bail out.
2518 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
2519 /* XXX: Use correct size */
2520 log_error(LOG_LEVEL_CLF,
2521 "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
2522 log_error(LOG_LEVEL_ERROR,
2523 "Invalid request line after applying header filters.");
2524 free_http_request(http);
2526 return JB_ERR_PARSE;
2534 /*********************************************************************
2538 * Description : Once a connection to the client has been accepted,
2539 * this function is called (via serve()) to handle the
2540 * main business of the communication. When this
2541 * function returns, the caller must close the client
2544 * FIXME: chat is nearly thousand lines long.
2548 * 1 : csp = Current client state (buffers, headers, etc...)
2550 * Returns : Nothing.
2552 *********************************************************************/
2553 static void chat(struct client_state *csp)
2555 char buf[BUFFER_SIZE];
2562 int ms_iis5_hack = 0;
2563 size_t byte_count = 0;
2564 int forwarded_connect_retries = 0;
2565 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
2566 const struct forward_spec *fwd;
2567 struct http_request *http;
2568 int len = 0; /* for buffer sizes (and negative error codes) */
2570 /* Function that does the content filtering for the current request */
2571 filter_function_ptr content_filter = NULL;
2573 /* Skeleton for HTTP response, if we should intercept the request */
2574 struct http_response *rsp;
2575 struct timeval timeout;
2577 memset(buf, 0, sizeof(buf));
2578 memset(&timeout, 0, sizeof(timeout));
2579 timeout.tv_sec = csp->config->socket_timeout;
2583 if (receive_client_request(csp) != JB_ERR_OK)
2587 if (parse_client_request(csp) != JB_ERR_OK)
2592 /* decide how to route the HTTP request */
2593 fwd = forward_url(csp, http);
2596 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
2597 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2602 * build the http request to send to the server
2603 * we have to do one of the following:
2605 * create = use the original HTTP request to create a new
2606 * HTTP request that has either the path component
2607 * without the http://domainspec (w/path) or the
2608 * full orininal URL (w/url)
2609 * Note that the path and/or the HTTP version may
2610 * have been altered by now.
2612 * connect = Open a socket to the host:port of the server
2613 * and short-circuit server and client socket.
2615 * pass = Pass the request unchanged if forwarding a CONNECT
2616 * request to a parent proxy. Note that we'll be sending
2617 * the CFAIL message ourselves if connecting to the parent
2618 * fails, but we won't send a CSUCCEED message if it works,
2619 * since that would result in a double message (ours and the
2620 * parent's). After sending the request to the parent, we simply
2623 * here's the matrix:
2626 * +--------+--------+
2628 * 0 | create | connect|
2630 * Forwarding +--------+--------+
2632 * 1 | create | pass |
2634 * +--------+--------+
2638 if (http->ssl && connect_port_is_forbidden(csp))
2640 const char *acceptable_connect_ports =
2641 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
2642 assert(NULL != acceptable_connect_ports);
2643 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
2644 "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
2645 csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
2646 csp->action->flags |= ACTION_BLOCK;
2652 freez(csp->headers->first->str);
2653 build_request_line(csp, fwd, &csp->headers->first->str);
2657 * We have a request. Check if one of the crunchers wants it.
2659 if (crunch_response_triggered(csp, crunchers_all))
2662 * Yes. The client got the crunch response
2663 * and we are done here after cleaning up.
2665 /* XXX: why list_remove_all()? */
2666 list_remove_all(csp->headers);
2671 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2673 if (fwd->forward_host)
2675 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2676 fwd->forward_host, fwd->forward_port, http->hostport);
2680 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2683 /* here we connect to the server, gateway, or the forwarder */
2685 while ((csp->sfd = forwarded_connect(fwd, http, csp))
2686 && (errno == EINVAL)
2687 && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2689 log_error(LOG_LEVEL_ERROR,
2690 "failed request #%u to connect to %s. Trying again.",
2691 forwarded_connect_retries, http->hostport);
2694 if (csp->sfd == JB_INVALID_SOCKET)
2696 if (fwd->type != SOCKS_NONE)
2699 rsp = error_response(csp, "forwarding-failed", errno);
2701 else if (errno == EINVAL)
2703 rsp = error_response(csp, "no-such-domain", errno);
2707 rsp = error_response(csp, "connect-failed", errno);
2708 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2712 /* Write the answer to the client */
2715 send_crunch_response(csp, rsp);
2721 hdr = list_to_text(csp->headers);
2724 /* FIXME Should handle error properly */
2725 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2727 list_remove_all(csp->headers);
2729 if (fwd->forward_host || (http->ssl == 0))
2732 * Write the client's (modified) header to the server
2733 * (along with anything else that may be in the buffer)
2735 if (write_socket(csp->sfd, hdr, strlen(hdr))
2736 || (flush_socket(csp->sfd, csp->iob) < 0))
2738 log_error(LOG_LEVEL_CONNECT,
2739 "write header to: %s failed: %E", http->hostport);
2741 rsp = error_response(csp, "connect-failed", errno);
2744 send_crunch_response(csp, rsp);
2754 * We're running an SSL tunnel and we're not forwarding,
2755 * so just send the "connect succeeded" message to the
2756 * client, flush the rest, and get out of the way.
2758 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
2766 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2768 /* we're finished with the client's header */
2771 maxfd = (csp->cfd > csp->sfd) ? csp->cfd : csp->sfd;
2773 /* pass data between the client and server
2774 * until one or the other shuts down the connection.
2783 * FD_ZERO here seems to point to an errant macro which crashes.
2784 * So do this by hand for now...
2786 memset(&rfds,0x00,sizeof(fd_set));
2790 FD_SET(csp->cfd, &rfds);
2791 FD_SET(csp->sfd, &rfds);
2793 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2794 if ((csp->flags & CSP_FLAG_CHUNKED)
2795 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
2796 && ((csp->iob->eod - csp->iob->cur) >= 5)
2797 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
2799 log_error(LOG_LEVEL_CONNECT,
2800 "Looks like we read the last chunk together with "
2801 "the server headers. We better stop reading.");
2802 byte_count = (size_t)(csp->iob->eod - csp->iob->cur);
2803 csp->expected_content_length = byte_count;
2804 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2806 if (server_body && server_response_is_complete(csp, byte_count))
2808 log_error(LOG_LEVEL_CONNECT,
2809 "Done reading from server. Expected content length: %d. "
2810 "Actual content length: %d. Most recently received: %d.",
2811 csp->expected_content_length, byte_count, len);
2814 * XXX: should not jump around,
2815 * chat() is complicated enough already.
2819 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2821 n = select((int)maxfd+1, &rfds, NULL, NULL, &timeout);
2825 log_error(LOG_LEVEL_ERROR,
2826 "Didn't receive data in time: %s", http->url);
2827 if ((byte_count == 0) && (http->ssl == 0))
2829 write_socket(csp->cfd, CONNECTION_TIMEOUT_RESPONSE,
2830 strlen(CONNECTION_TIMEOUT_RESPONSE));
2832 mark_server_socket_tainted(csp);
2837 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2838 mark_server_socket_tainted(csp);
2843 * This is the body of the browser's request,
2844 * just read and write it.
2846 if (FD_ISSET(csp->cfd, &rfds))
2848 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2852 /* XXX: not sure if this is necessary. */
2853 mark_server_socket_tainted(csp);
2854 break; /* "game over, man" */
2857 if (write_socket(csp->sfd, buf, (size_t)len))
2859 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2860 mark_server_socket_tainted(csp);
2867 * The server wants to talk. It could be the header or the body.
2868 * If `hdr' is null, then it's the header otherwise it's the body.
2869 * FIXME: Does `hdr' really mean `host'? No.
2871 if (FD_ISSET(csp->sfd, &rfds))
2874 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2878 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2880 if (http->ssl && (fwd->forward_host == NULL))
2883 * Just hang up. We already confirmed the client's CONNECT
2884 * request with status code 200 and unencrypted content is
2885 * no longer welcome.
2887 log_error(LOG_LEVEL_ERROR,
2888 "CONNECT already confirmed. Unable to tell the client about the problem.");
2891 else if (byte_count)
2894 * Just hang up. We already transmitted the original headers
2895 * and parts of the original content and therefore missed the
2896 * chance to send an error message (without risking data corruption).
2898 * XXX: we could retry with a fancy range request here.
2900 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2901 "Unable to tell the client about the problem.");
2902 mark_server_socket_tainted(csp);
2906 rsp = error_response(csp, "connect-failed", errno);
2909 send_crunch_response(csp, rsp);
2915 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2916 if (csp->flags & CSP_FLAG_CHUNKED)
2918 if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2920 /* XXX: this is a temporary hack */
2921 log_error(LOG_LEVEL_CONNECT,
2922 "Looks like we reached the end of the last chunk. "
2923 "We better stop reading.");
2924 csp->expected_content_length = byte_count + (size_t)len;
2925 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2929 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2932 * Add a trailing zero to let be able to use string operations.
2933 * XXX: do we still need this with filter_popups gone?
2938 * Normally, this would indicate that we've read
2939 * as much as the server has sent us and we can
2940 * close the client connection. However, Microsoft
2941 * in its wisdom has released IIS/5 with a bug that
2942 * prevents it from sending the trailing \r\n in
2943 * a 302 redirect header (and possibly other headers).
2944 * To work around this if we've haven't parsed
2945 * a full header we'll append a trailing \r\n
2946 * and see if this now generates a valid one.
2948 * This hack shouldn't have any impacts. If we've
2949 * already transmitted the header or if this is a
2950 * SSL connection, then we won't bother with this
2951 * hack. So we only work on partially received
2952 * headers. If we append a \r\n and this still
2953 * doesn't generate a valid header, then we won't
2954 * transmit anything to the client.
2959 if (server_body || http->ssl)
2962 * If we have been buffering up the document,
2963 * now is the time to apply content modification
2964 * and send the result to the client.
2968 p = execute_content_filter(csp, content_filter);
2970 * If the content filter fails, use the original
2971 * buffer and length.
2972 * (see p != NULL ? p : csp->iob->cur below)
2976 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2979 if (JB_ERR_OK != update_server_headers(csp))
2981 log_error(LOG_LEVEL_FATAL,
2982 "Failed to update server headers. after filtering.");
2985 hdr = list_to_text(csp->headers);
2988 /* FIXME Should handle error properly */
2989 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2992 if (write_socket(csp->cfd, hdr, strlen(hdr))
2993 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
2995 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2998 mark_server_socket_tainted(csp);
3006 break; /* "game over, man" */
3010 * This is NOT the body, so
3011 * Let's pretend the server just sent us a blank line.
3013 snprintf(buf, sizeof(buf), "\r\n");
3014 len = (int)strlen(buf);
3017 * Now, let the normal header parsing algorithm below do its
3018 * job. If it fails, we'll exit instead of continuing.
3025 * If this is an SSL connection or we're in the body
3026 * of the server document, just write it to the client,
3027 * unless we need to buffer the body for later content-filtering
3029 if (server_body || http->ssl)
3034 * If there is no memory left for buffering the content, or the buffer limit
3035 * has been reached, switch to non-filtering mode, i.e. make & write the
3036 * header, flush the iob and buf, and get out of the way.
3038 if (add_to_iob(csp, buf, len))
3043 log_error(LOG_LEVEL_INFO,
3044 "Flushing header and buffers. Stepping back from filtering.");
3046 hdr = list_to_text(csp->headers);
3050 * Memory is too tight to even generate the header.
3051 * Send our static "Out-of-memory" page.
3053 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
3054 rsp = cgi_error_memory();
3055 send_crunch_response(csp, rsp);
3056 mark_server_socket_tainted(csp);
3059 hdrlen = strlen(hdr);
3061 if (write_socket(csp->cfd, hdr, hdrlen)
3062 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
3063 || (write_socket(csp->cfd, buf, (size_t)len)))
3065 log_error(LOG_LEVEL_CONNECT,
3066 "Flush header and buffers to client failed: %E");
3068 mark_server_socket_tainted(csp);
3073 * Reset the byte_count to the amount of bytes
3074 * we just flushed. len will be added a few lines below,
3075 * hdrlen doesn't matter for LOG_LEVEL_CLF.
3077 byte_count = (size_t)flushed;
3079 content_filter = NULL;
3085 if (write_socket(csp->cfd, buf, (size_t)len))
3087 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
3088 mark_server_socket_tainted(csp);
3092 byte_count += (size_t)len;
3097 const char *header_start;
3099 * We're still looking for the end of the server's header.
3100 * Buffer up the data we just read. If that fails, there's
3101 * little we can do but send our static out-of-memory page.
3103 if (add_to_iob(csp, buf, len))
3105 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
3106 rsp = cgi_error_memory();
3107 send_crunch_response(csp, rsp);
3108 mark_server_socket_tainted(csp);
3112 header_start = csp->iob->cur;
3114 /* Convert iob into something sed() can digest */
3115 if (JB_ERR_PARSE == get_server_headers(csp))
3120 * Well, we tried our MS IIS/5 hack and it didn't work.
3121 * The header is incomplete and there isn't anything
3122 * we can do about it.
3124 log_error(LOG_LEVEL_INFO,
3125 "MS IIS5 hack didn't produce valid headers.");
3131 * Since we have to wait for more from the server before
3132 * we can parse the headers we just continue here.
3134 int header_offset = csp->iob->cur - header_start;
3135 assert(csp->iob->cur >= header_start);
3136 byte_count += (size_t)(len - header_offset);
3137 log_error(LOG_LEVEL_CONNECT, "Continuing buffering headers. "
3138 "byte_count: %d. header_offset: %d. len: %d.",
3139 byte_count, header_offset, len);
3144 /* Did we actually get anything? */
3145 if (NULL == csp->headers->first)
3147 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
3148 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3149 write_socket(csp->cfd, NO_SERVER_DATA_RESPONSE, strlen(NO_SERVER_DATA_RESPONSE));
3150 free_http_request(http);
3151 mark_server_socket_tainted(csp);
3155 assert(csp->headers->first->str);
3157 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
3158 strncmpic(csp->headers->first->str, "ICY", 3))
3161 * It doesn't look like a HTTP (or Shoutcast) response:
3162 * tell the client and log the problem.
3164 if (strlen(csp->headers->first->str) > 30)
3166 csp->headers->first->str[30] = '\0';
3168 log_error(LOG_LEVEL_ERROR,
3169 "Invalid server or forwarder response. Starts with: %s",
3170 csp->headers->first->str);
3171 log_error(LOG_LEVEL_CLF,
3172 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3173 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
3174 strlen(INVALID_SERVER_HEADERS_RESPONSE));
3175 free_http_request(http);
3176 mark_server_socket_tainted(csp);
3181 * We have now received the entire server header,
3182 * filter it and send the result to the client
3184 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
3186 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
3188 hdr = list_to_text(csp->headers);
3191 /* FIXME Should handle error properly */
3192 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3195 if (crunch_response_triggered(csp, crunchers_light))
3198 * One of the tags created by a server-header
3199 * tagger triggered a crunch. We already
3200 * delivered the crunch response to the client
3201 * and are done here after cleaning up.
3204 mark_server_socket_tainted(csp);
3207 /* Buffer and pcrs filter this if appropriate. */
3209 if (!http->ssl) /* We talk plaintext */
3211 content_filter = get_filter_function(csp);
3214 * Only write if we're not buffering for content modification
3216 if (!content_filter)
3219 * Write the server's (modified) header to
3220 * the client (along with anything else that
3221 * may be in the buffer)
3224 if (write_socket(csp->cfd, hdr, strlen(hdr))
3225 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
3227 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
3230 * The write failed, so don't bother mentioning it
3231 * to the client... it probably can't hear us anyway.
3234 mark_server_socket_tainted(csp);
3238 byte_count += (size_t)len;
3243 * XXX: the header lenght should probably
3244 * be calculated by get_server_headers().
3246 int header_length = csp->iob->cur - header_start;
3247 assert(csp->iob->cur > header_start);
3248 byte_count += (size_t)(len - header_length);
3251 /* we're finished with the server's header */
3257 * If this was a MS IIS/5 hack then it means the server
3258 * has already closed the connection. Nothing more to read.
3263 log_error(LOG_LEVEL_INFO,
3264 "Closed server connection detected with MS IIS5 hack enabled.");
3270 mark_server_socket_tainted(csp);
3271 return; /* huh? we should never get here */
3274 if (csp->content_length == 0)
3277 * If Privoxy didn't recalculate the Content-Lenght,
3278 * byte_count is still correct.
3280 csp->content_length = byte_count;
3283 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3284 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3285 && (csp->expected_content_length != byte_count))
3287 log_error(LOG_LEVEL_CONNECT,
3288 "Received %d bytes while expecting %d.",
3289 byte_count, csp->expected_content_length);
3290 mark_server_socket_tainted(csp);
3294 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
3295 csp->ip_addr_str, http->ocmd, csp->content_length);
3299 /*********************************************************************
3303 * Description : This is little more than chat. We only "serve" to
3304 * to close any socket that chat may have opened.
3307 * 1 : csp = Current client state (buffers, headers, etc...)
3311 *********************************************************************/
3313 void serve(struct client_state *csp)
3314 #else /* ifndef AMIGA */
3315 static void serve(struct client_state *csp)
3316 #endif /* def AMIGA */
3319 close_socket(csp->cfd);
3321 if (csp->sfd != JB_INVALID_SOCKET)
3323 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3324 static int monitor_thread_running = 0;
3326 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
3327 && (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
3329 remember_connection(csp->sfd, csp->http, forward_url(csp, csp->http));
3330 privoxy_mutex_lock(&connection_reuse_mutex);
3331 if (!monitor_thread_running)
3333 monitor_thread_running = 1;
3334 privoxy_mutex_unlock(&connection_reuse_mutex);
3335 wait_for_alive_connections();
3336 privoxy_mutex_lock(&connection_reuse_mutex);
3337 monitor_thread_running = 0;
3339 privoxy_mutex_unlock(&connection_reuse_mutex);
3343 forget_connection(csp->sfd);
3344 close_socket(csp->sfd);
3347 close_socket(csp->sfd);
3348 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3351 csp->flags &= ~CSP_FLAG_ACTIVE;
3357 /*********************************************************************
3359 * Function : server_thread
3361 * Description : We only exist to call `serve' in a threaded environment.
3364 * 1 : data = Current client state (buffers, headers, etc...)
3366 * Returns : Always 0.
3368 *********************************************************************/
3369 static int32 server_thread(void *data)
3371 serve((struct client_state *) data);
3378 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3379 /*********************************************************************
3383 * Description : Print usage info & exit.
3385 * Parameters : Pointer to argv[0] for identifying ourselves
3389 *********************************************************************/
3390 static void usage(const char *myname)
3392 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
3396 #endif /* defined(unix) */
3399 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
3400 #endif /* defined(unix) */
3401 "[--version] [configfile]\n"
3402 "Aborting\n", myname);
3407 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
3410 #ifdef MUTEX_LOCKS_AVAILABLE
3411 /*********************************************************************
3413 * Function : privoxy_mutex_lock
3415 * Description : Locks a mutex.
3418 * 1 : mutex = The mutex to lock.
3420 * Returns : Void. May exit in case of errors.
3422 *********************************************************************/
3423 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
3425 #ifdef FEATURE_PTHREAD
3426 int err = pthread_mutex_lock(mutex);
3429 if (mutex != &log_mutex)
3431 log_error(LOG_LEVEL_FATAL,
3432 "Mutex locking failed: %s.\n", strerror(err));
3437 EnterCriticalSection(mutex);
3438 #endif /* def FEATURE_PTHREAD */
3442 /*********************************************************************
3444 * Function : privoxy_mutex_unlock
3446 * Description : Unlocks a mutex.
3449 * 1 : mutex = The mutex to unlock.
3451 * Returns : Void. May exit in case of errors.
3453 *********************************************************************/
3454 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
3456 #ifdef FEATURE_PTHREAD
3457 int err = pthread_mutex_unlock(mutex);
3460 if (mutex != &log_mutex)
3462 log_error(LOG_LEVEL_FATAL,
3463 "Mutex unlocking failed: %s.\n", strerror(err));
3468 LeaveCriticalSection(mutex);
3469 #endif /* def FEATURE_PTHREAD */
3473 /*********************************************************************
3475 * Function : privoxy_mutex_init
3477 * Description : Prepares a mutex.
3480 * 1 : mutex = The mutex to initialize.
3482 * Returns : Void. May exit in case of errors.
3484 *********************************************************************/
3485 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
3487 #ifdef FEATURE_PTHREAD
3488 int err = pthread_mutex_init(mutex, 0);
3491 printf("Fatal error. Mutex initialization failed: %s.\n",
3496 InitializeCriticalSection(mutex);
3497 #endif /* def FEATURE_PTHREAD */
3499 #endif /* def MUTEX_LOCKS_AVAILABLE */
3501 /*********************************************************************
3503 * Function : initialize_mutexes
3505 * Description : Prepares mutexes if mutex support is available.
3509 * Returns : Void, exits in case of errors.
3511 *********************************************************************/
3512 static void initialize_mutexes(void)
3514 #ifdef MUTEX_LOCKS_AVAILABLE
3516 * Prepare global mutex semaphores
3518 privoxy_mutex_init(&log_mutex);
3519 privoxy_mutex_init(&log_init_mutex);
3520 privoxy_mutex_init(&connection_reuse_mutex);
3523 * XXX: The assumptions below are a bit naive
3524 * and can cause locks that aren't necessary.
3526 * For example older FreeBSD versions (< 6.x?)
3527 * have no gethostbyname_r, but gethostbyname is
3530 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
3531 privoxy_mutex_init(&resolver_mutex);
3532 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
3534 * XXX: should we use a single mutex for
3535 * localtime() and gmtime() as well?
3537 #ifndef HAVE_GMTIME_R
3538 privoxy_mutex_init(&gmtime_mutex);
3539 #endif /* ndef HAVE_GMTIME_R */
3541 #ifndef HAVE_LOCALTIME_R
3542 privoxy_mutex_init(&localtime_mutex);
3543 #endif /* ndef HAVE_GMTIME_R */
3546 privoxy_mutex_init(&rand_mutex);
3547 #endif /* ndef HAVE_RANDOM */
3548 #endif /* def MUTEX_LOCKS_AVAILABLE */
3552 /*********************************************************************
3556 * Description : Load the config file and start the listen loop.
3557 * This function is a lot more *sane* with the `load_config'
3558 * and `listen_loop' functions; although it stills does
3559 * a *little* too much for my taste.
3562 * 1 : argc = Number of parameters (including $0).
3563 * 2 : argv = Array of (char *)'s to the parameters.
3565 * Returns : 1 if : can't open config file, unrecognized directive,
3566 * stats requested in multi-thread mode, can't open the
3567 * log file, can't open the jar file, listen port is invalid,
3568 * any load fails, and can't bind port.
3570 * Else main never returns, the process must be signaled
3571 * to terminate execution. Or, on Windows, use the
3572 * "File", "Exit" menu option.
3574 *********************************************************************/
3576 int real_main(int argc, const char *argv[])
3578 int main(int argc, const char *argv[])
3582 unsigned int random_seed;
3584 struct passwd *pw = NULL;
3585 struct group *grp = NULL;
3588 char *pre_chroot_nslookup_to_load_resolver = NULL;
3595 #if !defined(_WIN32)
3602 /* Prepare mutexes if supported and necessary. */
3603 initialize_mutexes();
3605 /* Enable logging until further notice. */
3609 * Parse the command line arguments
3611 * XXX: simply printing usage information in case of
3612 * invalid arguments isn't particularly user friendly.
3614 while (++argc_pos < argc)
3617 /* Check to see if the service must be installed or uninstalled */
3618 if (strncmp(argv[argc_pos], "--install", 9) == 0)
3620 const char *pName = argv[argc_pos] + 9;
3623 exit( (install_service(pName)) ? 0 : 1 );
3625 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
3627 const char *pName = argv[argc_pos] + 11;
3630 exit((uninstall_service(pName)) ? 0 : 1);
3632 else if (strcmp(argv[argc_pos], "--service" ) == 0)
3634 bRunAsService = TRUE;
3635 w32_set_service_cwd();
3636 atexit(w32_service_exit_notify);
3639 #endif /* defined(_WIN32) */
3642 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3644 if (strcmp(argv[argc_pos], "--help") == 0)
3649 else if(strcmp(argv[argc_pos], "--version") == 0)
3651 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
3657 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
3662 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
3664 if (++argc_pos == argc) usage(argv[0]);
3665 pidfile = strdup(argv[argc_pos]);
3668 else if (strcmp(argv[argc_pos], "--user" ) == 0)
3670 if (++argc_pos == argc) usage(argv[argc_pos]);
3672 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
3675 if (NULL == (grp = getgrnam(p)))
3677 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
3681 if (NULL == (pw = getpwnam(argv[argc_pos])))
3683 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
3686 if (p != NULL) *--p = '\0';
3689 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
3691 if (++argc_pos == argc) usage(argv[0]);
3692 pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
3695 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
3699 #endif /* defined(unix) */
3701 else if (argc_pos + 1 != argc)
3704 * This is neither the last command line
3705 * option, nor was it recognized before,
3706 * therefore it must be invalid.
3712 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3714 configfile = argv[argc_pos];
3717 } /* -END- while (more arguments) */
3719 show_version(Argv[0]);
3722 if ( *configfile != '/' )
3724 char cwd[BUFFER_SIZE];
3726 size_t abs_file_size;
3728 /* make config-filename absolute here */
3729 if (NULL == getcwd(cwd, sizeof(cwd)))
3731 perror("failed to get current working directory");
3736 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3737 basedir = strdup(cwd);
3739 if (NULL == basedir ||
3740 NULL == (abs_file = malloc(abs_file_size)))
3742 perror("malloc failed");
3745 strlcpy(abs_file, basedir, abs_file_size);
3746 strlcat(abs_file, "/", abs_file_size );
3747 strlcat(abs_file, configfile, abs_file_size);
3748 configfile = abs_file;
3750 #endif /* defined unix */
3754 clients->next = NULL;
3756 /* XXX: factor out initialising after the next stable release. */
3759 #elif defined(_WIN32)
3763 random_seed = (unsigned int)time(NULL);
3765 srandom(random_seed);
3768 #endif /* ifdef HAVE_RANDOM */
3771 * Unix signal handling
3773 * Catch the abort, interrupt and terminate signals for a graceful exit
3774 * Catch the hangup signal so the errlog can be reopened.
3775 * Ignore the broken pipe signals (FIXME: Why?)
3777 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3780 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3781 const int ignored_signals[] = { SIGPIPE, 0 };
3783 for (idx = 0; catched_signals[idx] != 0; idx++)
3785 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3786 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3788 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3789 #endif /* ifdef sun */
3791 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3795 for (idx = 0; ignored_signals[idx] != 0; idx++)
3797 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3799 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3804 #else /* ifdef _WIN32 */
3805 # ifdef _WIN_CONSOLE
3807 * We *are* in a windows console app.
3808 * Print a verbose messages about FAQ's and such
3810 printf("%s", win32_blurb);
3811 # endif /* def _WIN_CONSOLE */
3812 #endif /* def _WIN32 */
3815 /* Initialize the CGI subsystem */
3816 cgi_init_error_messages();
3819 * If runnig on unix and without the --nodaemon
3820 * option, become a daemon. I.e. fork, detach
3821 * from tty and get process group leadership
3834 if ( pid < 0 ) /* error */
3839 else if ( pid != 0 ) /* parent */
3844 * must check for errors
3845 * child died due to missing files aso
3848 wpid = waitpid( pid, &status, WNOHANG );
3857 /* Should be more portable, but not as well tested */
3862 #else /* ndef __FreeBSD__ */
3864 #endif /* ndef __FreeBSD__ */
3865 fd = open("/dev/tty", O_RDONLY);
3868 /* no error check here */
3869 ioctl( fd, TIOCNOTTY,0 );
3874 * stderr (fd 2) will be closed later on, when the
3875 * log file has been parsed.
3882 } /* -END- if (!no_daemon) */
3885 * As soon as we have written the PID file, we can switch
3886 * to the user and group ID indicated by the --user option
3892 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3894 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3898 if (setgroups(1, &grp->gr_gid))
3900 log_error(LOG_LEVEL_FATAL, "setgroups() failed: %E");
3903 else if (initgroups(pw->pw_name, pw->pw_gid))
3905 log_error(LOG_LEVEL_FATAL, "initgroups() failed: %E");
3911 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3913 /* Read the time zone file from /etc before doing chroot. */
3915 if (NULL != pre_chroot_nslookup_to_load_resolver
3916 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3918 /* Initialize resolver library. */
3919 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3921 if (chroot(pw->pw_dir) < 0)
3923 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3927 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3930 if (setuid(pw->pw_uid))
3932 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3936 char putenv_dummy[64];
3938 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3939 if (putenv(putenv_dummy) != 0)
3941 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3944 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3945 if (putenv(putenv_dummy) != 0)
3947 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3953 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3956 #endif /* defined unix */
3959 /* This will be FALSE unless the command line specified --service
3963 /* Yup, so now we must attempt to establish a connection
3964 * with the service dispatcher. This will only work if this
3965 * process was launched by the service control manager to
3966 * actually run as a service. If this isn't the case, i've
3967 * known it take around 30 seconds or so for the call to return.
3970 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3971 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3973 /* Service has run, and at this point is now being stopped, so just return */
3978 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3980 /* An error occurred. Usually it's because --service was wrongly specified
3981 * and we were unable to connect to the Service Control Dispatcher because
3982 * it wasn't expecting us and is therefore not listening.
3984 * For now, just continue below to call the listen_loop function.
3987 #endif /* def _WIN32 */
3997 /*********************************************************************
3999 * Function : bind_port_helper
4001 * Description : Bind the listen port. Handles logging, and aborts
4005 * 1 : config = Privoxy configuration. Specifies port
4008 * Returns : Port that was opened.
4010 *********************************************************************/
4011 static jb_socket bind_port_helper(struct configuration_spec * config)
4016 if (config->haddr == NULL)
4018 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
4023 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
4024 config->hport, config->haddr);
4027 result = bind_port(config->haddr, config->hport, &bfd);
4034 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
4035 "There may be another Privoxy or some other "
4036 "proxy running on port %d",
4037 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
4038 config->hport, config->hport);
4041 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
4042 "The hostname is not resolvable",
4043 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
4046 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
4047 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
4050 /* shouldn't get here */
4051 return JB_INVALID_SOCKET;
4054 config->need_bind = 0;
4061 /* Without this simple workaround we get this compiler warning from _beginthread
4062 * warning C4028: formal parameter 1 different from declaration
4064 void w32_service_listen_loop(void *p)
4068 #endif /* def _WIN32 */
4071 /*********************************************************************
4073 * Function : listen_loop
4075 * Description : bind the listen port and enter a "FOREVER" listening loop.
4081 *********************************************************************/
4082 static void listen_loop(void)
4084 struct client_state *csp = NULL;
4086 struct configuration_spec * config;
4088 config = load_config();
4090 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4092 * XXX: Should be relocated once it no
4093 * longer needs to emit log messages.
4095 initialize_reusable_connections();
4096 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4098 bfd = bind_port_helper(config);
4100 #ifdef FEATURE_GRACEFUL_TERMINATION
4101 while (!g_terminate)
4106 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
4107 while (waitpid(-1, NULL, WNOHANG) > 0)
4109 /* zombie children */
4111 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
4114 * Free data that was used by died threads
4120 * Re-open the errlog after HUP signal
4122 if (received_hup_signal)
4124 if (NULL != config->logfile)
4126 init_error_log(Argv[0], config->logfile);
4128 received_hup_signal = 0;
4132 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
4134 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
4138 csp->flags |= CSP_FLAG_ACTIVE;
4139 csp->sfd = JB_INVALID_SOCKET;
4141 csp->config = config = load_config();
4143 if ( config->need_bind )
4146 * Since we were listening to the "old port", we will not see
4147 * a "listen" param change until the next IJB request. So, at
4148 * least 1 more request must be made for us to find the new
4149 * setting. I am simply closing the old socket and binding the
4152 * Which-ever is correct, we will serve 1 more page via the
4153 * old settings. This should probably be a "show-proxy-args"
4154 * request. This should not be a so common of an operation
4155 * that this will hurt people's feelings.
4160 bfd = bind_port_helper(config);
4163 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
4165 if (!accept_connection(csp, bfd))
4167 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
4180 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
4183 #ifdef FEATURE_TOGGLE
4184 if (global_toggle_state)
4185 #endif /* def FEATURE_TOGGLE */
4187 csp->flags |= CSP_FLAG_TOGGLED_ON;
4190 if (run_loader(csp))
4192 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
4193 /* Never get here - LOG_LEVEL_FATAL causes program exit */
4197 if (block_acl(NULL,csp))
4199 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
4200 close_socket(csp->cfd);
4204 #endif /* def FEATURE_ACL */
4206 /* add it to the list of clients */
4207 csp->next = clients->next;
4208 clients->next = csp;
4210 if (config->multi_threaded)
4214 /* this is a switch () statment in the C preprocessor - ugh */
4215 #undef SELECTED_ONE_OPTION
4217 /* Use Pthreads in preference to native code */
4218 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
4219 #define SELECTED_ONE_OPTION
4221 pthread_t the_thread;
4222 pthread_attr_t attrs;
4224 pthread_attr_init(&attrs);
4225 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
4226 errno = pthread_create(&the_thread, &attrs,
4227 (void * (*)(void *))serve, csp);
4228 child_id = errno ? -1 : 0;
4229 pthread_attr_destroy(&attrs);
4233 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
4234 #define SELECTED_ONE_OPTION
4235 child_id = _beginthread(
4236 (void (*)(void *))serve,
4241 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
4242 #define SELECTED_ONE_OPTION
4243 child_id = _beginthread(
4244 (void(* _Optlink)(void*))serve,
4250 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
4251 #define SELECTED_ONE_OPTION
4253 thread_id tid = spawn_thread
4254 (server_thread, "server", B_NORMAL_PRIORITY, csp);
4256 if ((tid >= 0) && (resume_thread(tid) == B_OK))
4258 child_id = (int) tid;
4267 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
4268 #define SELECTED_ONE_OPTION
4269 csp->cfd = ReleaseSocket(csp->cfd, -1);
4272 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4273 NP_Output, Output(),
4274 NP_CloseOutput, FALSE,
4275 NP_Name, (ULONG)"privoxy child",
4279 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4280 NP_Output, Output(),
4281 NP_CloseOutput, FALSE,
4282 NP_Name, (ULONG)"privoxy child",
4283 NP_StackSize, 200*1024,
4289 ((struct Task *)child_id)->tc_UserData = csp;
4290 Signal((struct Task *)child_id, SIGF_SINGLE);
4295 #if !defined(SELECTED_ONE_OPTION)
4298 /* This block is only needed when using fork().
4299 * When using threads, the server thread was
4300 * created and run by the call to _beginthread().
4302 if (child_id == 0) /* child */
4305 #ifdef FEATURE_TOGGLE
4306 int inherited_toggle_state = global_toggle_state;
4307 #endif /* def FEATURE_TOGGLE */
4312 * If we've been toggled or we've blocked the request, tell Mom
4315 #ifdef FEATURE_TOGGLE
4316 if (inherited_toggle_state != global_toggle_state)
4318 rc |= RC_FLAG_TOGGLED;
4320 #endif /* def FEATURE_TOGGLE */
4322 #ifdef FEATURE_STATISTICS
4323 if (csp->flags & CSP_FLAG_REJECTED)
4325 rc |= RC_FLAG_BLOCKED;
4327 #endif /* ndef FEATURE_STATISTICS */
4331 else if (child_id > 0) /* parent */
4333 /* in a fork()'d environment, the parent's
4334 * copy of the client socket and the CSP
4338 #if !defined(_WIN32) && !defined(__CYGWIN__)
4340 wait( &child_status );
4343 * Evaluate child's return code: If the child has
4344 * - been toggled, toggle ourselves
4345 * - blocked its request, bump up the stats counter
4348 #ifdef FEATURE_TOGGLE
4349 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
4351 global_toggle_state = !global_toggle_state;
4353 #endif /* def FEATURE_TOGGLE */
4355 #ifdef FEATURE_STATISTICS
4357 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
4361 #endif /* def FEATURE_STATISTICS */
4363 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
4364 close_socket(csp->cfd);
4365 csp->flags &= ~CSP_FLAG_ACTIVE;
4369 #undef SELECTED_ONE_OPTION
4370 /* end of cpp switch () */
4372 if (child_id < 0) /* failed */
4374 char buf[BUFFER_SIZE];
4376 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
4378 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
4380 write_socket(csp->cfd, buf, strlen(buf));
4381 close_socket(csp->cfd);
4382 csp->flags &= ~CSP_FLAG_ACTIVE;
4393 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
4395 /* Clean up. Aim: free all memory (no leaks) */
4396 #ifdef FEATURE_GRACEFUL_TERMINATION
4398 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
4400 unload_current_config_file();
4401 unload_current_actions_file();
4402 unload_current_re_filterfile();
4403 #ifdef FEATURE_TRUST
4404 unload_current_trust_file();
4407 if (config->multi_threaded)
4414 } while ((clients->next != NULL) && (--i > 0));
4418 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
4429 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
4430 /* Cleanup - remove taskbar icon etc. */
4435 #endif /* FEATURE_GRACEFUL_TERMINATION */