1 const char jcc_rcs[] = "$Id: jcc.c,v 1.224 2009/02/14 15:32:04 fabiankeil Exp $";
2 /*********************************************************************
4 * File : $Source: /cvsroot/ijbswa/current/jcc.c,v $
6 * Purpose : Main file. Contains main() method, main loop, and
7 * the main connection-handling function.
9 * Copyright : Written by and Copyright (C) 2001-2009 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 1.224 2009/02/14 15:32:04 fabiankeil
37 * Add the request URL to the timeout message in chat().
40 * Revision 1.223 2009/02/09 21:21:16 fabiankeil
41 * Now that init_log_module() is called earlier, call show_version()
42 * later on from main() directly so it doesn't get called for --help
45 * Revision 1.222 2009/02/08 12:56:51 fabiankeil
46 * Call initialize_mutexes() before init_log_module() again.
47 * Broken since r220, might be the cause of Lee's #2579448.
49 * Revision 1.221 2009/02/06 18:02:58 fabiankeil
50 * When dropping privileges, also give up membership in supplementary
51 * groups. Thanks to Matthias Drochner for reporting the problem,
52 * providing the initial patch and testing the final version.
54 * Revision 1.220 2009/02/04 18:29:07 fabiankeil
55 * Initialize the log module before parsing arguments.
56 * Thanks to Matthias Drochner for the report.
58 * Revision 1.219 2009/01/31 16:08:21 fabiankeil
59 * Remove redundant error check in receive_client_request().
61 * Revision 1.218 2009/01/31 12:25:54 fabiankeil
62 * Flatten indentation in receive_client_request().
64 * Revision 1.217 2009/01/07 19:50:09 fabiankeil
65 * - If the socket-timeout has been reached and the client
66 * hasn't received any data yet, send an explanation before
67 * closing the connection.
68 * - In get_request_line(), signal timeouts the right way.
70 * Revision 1.216 2008/12/24 22:13:11 ler762
71 * fix GCC 3.4.4 warning
73 * Revision 1.215 2008/12/24 17:06:19 fabiankeil
74 * Keep a thread around to timeout alive connections
75 * even if no new requests are coming in.
77 * Revision 1.214 2008/12/20 14:53:55 fabiankeil
78 * Add config option socket-timeout to control the time
79 * Privoxy waits for data to arrive on a socket. Useful
80 * in case of stale ssh tunnels or when fuzz-testing.
82 * Revision 1.213 2008/12/15 18:45:51 fabiankeil
83 * When logging crunches, log the whole URL, so one can easily
84 * differentiate between vanilla HTTP and CONNECT requests.
86 * Revision 1.212 2008/12/14 15:46:22 fabiankeil
87 * Give crunched requests their own log level.
89 * Revision 1.211 2008/12/06 10:05:03 fabiankeil
90 * Downgrade "Received x bytes while expecting y." message to
91 * LOG_LEVEL_CONNECT as it doesn't necessarily indicate an error.
93 * Revision 1.210 2008/12/02 22:03:18 fabiankeil
94 * Don't miscalculate byte_count if we don't get all the
95 * server headers with one read_socket() call. With keep-alive
96 * support enabled, this caused delays until the server closed
99 * Revision 1.209 2008/11/27 09:44:04 fabiankeil
100 * Cosmetics for the last commit: Don't watch out for
101 * the last chunk if the content isn't chunk-encoded or
102 * if we already determined the content length previously.
104 * Revision 1.208 2008/11/26 18:24:17 fabiankeil
105 * Recognize that the server response is complete if the
106 * last chunk is read together with the server headers.
109 * Revision 1.207 2008/11/25 17:25:16 fabiankeil
110 * Don't convert the client-header list to text until we need to.
112 * Revision 1.206 2008/11/23 17:00:11 fabiankeil
113 * Some more chat() cosmetics.
115 * Revision 1.205 2008/11/16 12:43:49 fabiankeil
116 * Turn keep-alive support into a runtime feature
117 * that is disabled by setting keep-alive-timeout
118 * to a negative value.
120 * Revision 1.204 2008/11/06 19:42:17 fabiankeil
121 * Fix last-chunk detection hack to also apply
122 * if buf[] contains nothing but the last-chunk.
124 * Revision 1.203 2008/11/06 18:34:35 fabiankeil
125 * Factor receive_client_request() and
126 * parse_client_request() out of chat().
128 * Revision 1.202 2008/11/02 18:40:34 fabiankeil
129 * If we received a different amount of data than we expected,
130 * log a warning and make sure the server socket isn't reused.
132 * Revision 1.201 2008/11/02 16:48:20 fabiankeil
133 * Revert revision 1.195 and try again.
135 * Revision 1.200 2008/10/26 16:53:18 fabiankeil
138 * Revision 1.199 2008/10/26 15:36:10 fabiankeil
139 * Remove two debug messages with LOG_LEVEL_INFO.
141 * Revision 1.198 2008/10/22 15:19:55 fabiankeil
142 * Once More, With Feeling: if there is no logfile
143 * because the user didn't specify one, we shouldn't
144 * call init_error_log() after receiving SIGHUP either.
146 * Revision 1.197 2008/10/20 17:02:40 fabiankeil
147 * If SIGHUP is received while we aren't running in daemon
148 * mode, calling init_error_log() would be a mistake.
150 * Revision 1.196 2008/10/16 09:16:41 fabiankeil
151 * - Fix two gcc44 conversion warnings.
152 * - Don't bother logging the last five bytes
155 * Revision 1.195 2008/10/13 16:04:37 fabiankeil
156 * Make sure we don't try to reuse tainted server sockets.
158 * Revision 1.194 2008/10/12 18:35:18 fabiankeil
159 * The last commit was a bit too ambitious, apparently the content
160 * length adjustment is only necessary if we aren't buffering.
162 * Revision 1.193 2008/10/12 15:57:35 fabiankeil
163 * Fix content length calculation if we read headers
164 * and the start of the body at once. Now that we have
165 * FEATURE_CONNECTION_KEEP_ALIVE, it actually matters.
167 * Revision 1.192 2008/10/11 18:19:14 fabiankeil
168 * Even more chat() cosmetics.
170 * Revision 1.191 2008/10/11 18:00:14 fabiankeil
171 * Reformat some comments in chat().
173 * Revision 1.190 2008/10/11 14:58:00 fabiankeil
174 * In case of chunk-encoded content, stop reading if
175 * the buffer looks like it ends with the last chunk.
177 * Revision 1.189 2008/10/11 09:53:00 fabiankeil
178 * Let server_response_is_complete() deal properly with
179 * content that is neither buffered nor read all at once.
181 * Revision 1.188 2008/10/09 18:21:41 fabiankeil
182 * Flush work-in-progress changes to keep outgoing connections
183 * alive where possible. Incomplete and mostly #ifdef'd out.
185 * Revision 1.187 2008/09/07 12:35:05 fabiankeil
186 * Add mutex lock support for _WIN32.
188 * Revision 1.186 2008/09/04 08:13:58 fabiankeil
189 * Prepare for critical sections on Windows by adding a
190 * layer of indirection before the pthread mutex functions.
192 * Revision 1.185 2008/08/30 12:03:07 fabiankeil
193 * Remove FEATURE_COOKIE_JAR.
195 * Revision 1.184 2008/08/22 15:34:45 fabiankeil
196 * - Silence LLVM/Clang complaint.
197 * - Make received_hup_signal static.
198 * - Hide definitions for basedir, pidfile and received_hup_signal
199 * from __EMX__ as they only seem to be used in case of #ifdef unix.
201 * Revision 1.183 2008/08/21 07:09:35 fabiankeil
202 * Accept Shoutcast responses again. Problem reported
203 * and fix suggested by Stefan in #2062860.
205 * Revision 1.182 2008/06/27 11:13:56 fabiankeil
206 * Fix possible NULL-pointer dereference reported
207 * by din_a4 in #2003937. Pointy hat to me.
209 * Revision 1.181 2008/05/21 15:47:15 fabiankeil
210 * Streamline sed()'s prototype and declare
211 * the header parse and add structures static.
213 * Revision 1.180 2008/05/21 15:26:32 fabiankeil
214 * - Mark csp as immutable for send_crunch_response().
215 * - Fix comment spelling.
217 * Revision 1.179 2008/05/20 20:13:32 fabiankeil
218 * Factor update_server_headers() out of sed(), ditch the
219 * first_run hack and make server_patterns_light static.
221 * Revision 1.178 2008/05/10 13:23:38 fabiankeil
222 * Don't provide get_header() with the whole client state
223 * structure when it only needs access to csp->iob.
225 * Revision 1.177 2008/05/10 11:51:12 fabiankeil
226 * Make the "read the rest of the headers" loop a bit more readable.
228 * Revision 1.176 2008/05/10 11:37:57 fabiankeil
229 * - Instead of logging when the IIS5 hack is enabled, log when it fails.
230 * - Remove useless comment.
232 * Revision 1.175 2008/05/09 18:53:59 fabiankeil
233 * Fix comment grammar.
235 * Revision 1.174 2008/05/07 18:05:53 fabiankeil
236 * Remove the pointless buffer in client_protocol_is_unsupported().
238 * Revision 1.173 2008/05/06 15:09:00 fabiankeil
239 * Least-effort fix for bug #1821930 (reported by Lee):
240 * If the response doesn't look like HTTP,
241 * tell the client and log the problem.
243 * Revision 1.172 2008/04/16 16:38:21 fabiankeil
244 * Don't pass the whole csp structure to flush_socket()
245 * when it only needs a file descriptor and a buffer.
247 * Revision 1.171 2008/03/27 18:27:25 fabiankeil
248 * Remove kill-popups action.
250 * Revision 1.170 2008/03/06 16:33:46 fabiankeil
251 * If limit-connect isn't used, don't limit CONNECT requests to port 443.
253 * Revision 1.169 2008/03/04 18:30:39 fabiankeil
254 * Remove the treat-forbidden-connects-like-blocks action. We now
255 * use the "blocked" page for forbidden CONNECT requests by default.
257 * Revision 1.168 2008/03/02 12:25:25 fabiankeil
258 * Also use shiny new connect_port_is_forbidden() in jcc.c.
260 * Revision 1.167 2008/02/23 16:57:12 fabiankeil
261 * Rename url_actions() to get_url_actions() and let it
262 * use the standard parameter ordering.
264 * Revision 1.166 2008/02/23 16:33:43 fabiankeil
265 * Let forward_url() use the standard parameter ordering
266 * and mark its second parameter immutable.
268 * Revision 1.165 2008/02/02 19:36:56 fabiankeil
269 * Remove the "Listening ... for local connections only" log message.
270 * Whether or not remote connections are able to reach Privoxy is up
271 * to the operating system.
273 * Revision 1.164 2007/12/16 18:32:46 fabiankeil
274 * Prevent the log messages for CONNECT requests to unacceptable
275 * ports from printing the limit-connect argument as [null] if
276 * limit-connect hasn't been explicitly enabled.
278 * Revision 1.163 2007/12/13 01:47:11 david__schmidt
279 * Make sure all console-mode apps get a usage() instance
281 * Revision 1.162 2007/12/06 17:54:57 fabiankeil
282 * Reword NO_SERVER_DATA_RESPONSE to make it harder
283 * to misunderstand what the message is all about.
285 * Revision 1.161 2007/12/04 19:44:22 fabiankeil
286 * Unbreak trustfile which previously didn't work without
287 * FEATURE_TOGGLE. Fixes BR#1843585, reported by Lee.
289 * Revision 1.160 2007/11/29 18:00:29 fabiankeil
290 * Plug memory leak. Spotted by Valgrind, triggered by
291 * Privoxy-Regression-Test feeding proxyfuzz.py.
293 * Revision 1.159 2007/11/24 14:34:09 fabiankeil
294 * In the HTTP snipplets, refer to the client as client.
296 * Revision 1.158 2007/11/11 16:44:17 fabiankeil
297 * Emit a log message when activating the MS IIS5 hack.
299 * Revision 1.157 2007/11/03 17:34:49 fabiankeil
300 * Log the "weak randomization factor" warning only
301 * once for mingw32 and provide some more details.
303 * Revision 1.156 2007/11/01 18:20:58 fabiankeil
304 * Initialize log module after initializing mutexes, future
305 * deadlocks in that code should now work cross-platform.
307 * Revision 1.155 2007/10/23 20:12:45 fabiankeil
308 * Fix first CSUCCEED line to end in \r\n as required by RFC1945.
309 * Reported by Bert van Leeuwen in BR#1818808.
311 * Revision 1.154 2007/10/19 17:00:08 fabiankeil
312 * Downgrade "Flushing header and buffers" message to LOG_LEVEL_INFO.
314 * Revision 1.153 2007/10/14 14:12:41 fabiankeil
315 * When in daemon mode, close stderr after the configuration file has been
316 * parsed the first time. If logfile isn't set, stop logging. Fixes BR#897436.
318 * Revision 1.152 2007/10/04 18:03:34 fabiankeil
319 * - Fix a crash when parsing invalid requests whose first header
320 * is rejected by get_header(). Regression (re?)introduced
321 * in r1.143 by yours truly.
322 * - Move ACTION_VANILLA_WAFER handling into parsers.c's
323 * client_cookie_adder() to make sure send-vanilla-wafer can be
324 * controlled through tags (and thus regression-tested).
326 * Revision 1.151 2007/09/29 10:21:16 fabiankeil
327 * - Move get_filter_function() from jcc.c to filters.c
328 * so the filter functions can be static.
329 * - Don't bother filtering body-less responses.
331 * Revision 1.150 2007/09/28 16:39:29 fabiankeil
332 * Execute content filters through execute_content_filter().
334 * Revision 1.149 2007/09/04 15:08:48 fabiankeil
335 * Initialize req to NULL to make sure it's defined if the
336 * first read_socket() call fails. Reported by icmp30.
338 * Revision 1.148 2007/08/26 16:47:13 fabiankeil
339 * Add Stephen Gildea's --pre-chroot-nslookup patch [#1276666],
340 * extensive comments moved to user manual.
342 * Revision 1.147 2007/08/25 14:42:40 fabiankeil
343 * Don't crash if a broken header filter wiped out the request line.
345 * Revision 1.146 2007/08/20 17:09:32 fabiankeil
346 * Fix byte_count calculation in case of flushes
347 * and don't parse the server headers a second time.
349 * Revision 1.145 2007/08/19 13:13:31 fabiankeil
350 * - If there's a connection problem after we already forwarded
351 * parts of the original content, just hang up. Fixes BR#1776724.
352 * - Fix warnings about unused code on mingw32.
353 * - In case of flushes, calculate the byte count
354 * less incorrectly (I think).
356 * Revision 1.144 2007/08/11 14:43:22 fabiankeil
357 * Add some more prototypes for static functions.
359 * Revision 1.143 2007/08/05 13:58:19 fabiankeil
360 * Comment out request_contains_null_bytes() until it's used again.
362 * Revision 1.142 2007/08/05 13:50:26 fabiankeil
363 * #1763173 from Stefan Huehner: s@const static@static const@
364 * and declare some more functions static.
366 * Revision 1.141 2007/08/04 09:56:23 fabiankeil
367 * - Log rejected CONNECT requests with LOG_LEVEL_INFO
368 * and explain why they were rejected in the first place.
369 * - Fix the LOG_LEVEL_CLF message for crunches of unallowed
370 * CONNECT requests. The request line was missing.
371 * - Add two more XXX reminders as we don't have enough already.
373 * Revision 1.140 2007/07/21 11:51:36 fabiankeil
374 * As Hal noticed, checking dispatch_cgi() as the last cruncher
375 * looks like a bug if CGI requests are blocked unintentionally,
376 * so don't do it unless the user enabled the new config option
377 * "allow-cgi-request-crunching".
379 * Revision 1.139 2007/07/14 07:46:41 fabiankeil
380 * - Allow to rewrite the request destination behind the client's back.
381 * - Turn the weird-looking unconditional for loop that
382 * reads the client request into a conditional while loop.
383 * Move the stuff that only runs once out of the loop.
384 * - Move parts of chat(), server_content_type() and the
385 * necessary stuff to fix BR#1750917 into get_filter_function().
387 * Revision 1.138 2007/06/03 18:45:18 fabiankeil
388 * Temporary workaround for BR#1730105.
390 * Revision 1.137 2007/06/01 18:16:36 fabiankeil
391 * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
392 * deadlocks and crashes on OpenBSD and possibly other OS with neither
393 * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
394 * Thanks to Ralf Horstmann for report and solution.
396 * Revision 1.136 2007/06/01 16:41:11 fabiankeil
397 * Add forward-override{} to change the forwarding settings through
398 * action sections. This is mainly interesting to forward different
399 * clients differently (for example based on User-Agent or request
402 * Revision 1.135 2007/05/24 17:03:50 fabiankeil
403 * - Let usage() mention the --chroot parameter.
404 * - Use read_socket() consistently and always leave
405 * the last buffer byte alone, even in cases where
406 * null termination (currently) doesn't matter.
408 * Revision 1.134 2007/05/16 14:59:46 fabiankeil
409 * - Fix config file loading on Unix if no config file is specified.
410 * Since r1.97 Privoxy would always interpret the last argument as
411 * config file, even if it's a valid command line option.
412 * - Abort in case of unrecognized command line options. Closes #1719696.
413 * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
414 * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
416 * Revision 1.133 2007/05/04 11:23:19 fabiankeil
417 * - Don't rerun crunchers that only depend on the request URL.
418 * - Don't count redirects and CGI requests as "blocked requests".
420 * Revision 1.132 2007/04/25 15:15:17 fabiankeil
421 * Support crunching based on tags created by server-header taggers.
423 * Revision 1.131 2007/04/22 13:24:50 fabiankeil
424 * Make HTTP snippets static (again). Add a Content-Type for those
425 * with content so the browser doesn't guess it based on the URL.
427 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
428 * Move crunching and request line rebuilding out of chat().
430 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
431 * Introduce tags as alternative way to specify which
432 * actions apply to a request. At the moment tags can be
433 * created based on client and server headers.
435 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
436 * Don't CLF-log CONNECT requests twice.
438 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
439 * Log the source address for ACL-related connection drops.
441 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
442 * New config option: enforce-blocks.
444 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
445 * - Move null byte check into separate function.
446 * - Don't confuse the client with error pages
447 * if a CONNECT request was already confirmed.
449 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
450 * Speed up NULL byte escaping and only log the complete
451 * NULL byte requests with header debugging enabled.
453 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
454 * Answer requests that contain NULL bytes with
455 * a custom response instead of waiting for more
456 * data until the client eventually hangs up.
458 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
459 * - Move delivery and logging of crunched responses
460 * from chat() into send_crunch_response().
461 * - Display the reason for generating http_responses.
462 * - Log the content length for LOG_LEVEL_CLF correctly
463 * (still incorrect for some fixed responses).
464 * - Reword an incorrect comment about
465 * treat-forbidden-connects-like-blocks violating
467 * - Add some log messages.
469 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
470 * Move mutex initialization into separate
471 * function and exit in case of errors.
473 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
474 * - Start to reduce chat()'s line count and move
475 * parts of it into separate functions.
476 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
478 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
479 * - Add Proxy-Agent header to HTTP snippets that are
480 * supposed to reach HTTP clients only.
481 * - Made a few CONNECT log messages more descriptive.
482 * - Catch completely empty server responses (as seen
483 * with Tor's fake ".noconnect" top level domain).
484 * - Use shiny new "forwarding-failed" template for socks errors.
486 * Revision 1.118 2007/01/07 07:43:43 joergs
487 * AmigaOS4 support added.
489 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
490 * Added config option accept-intercepted-requests
491 * and disabled it by default.
493 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
494 * Reverted parts of my last commit
495 * to keep error handling working.
497 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
498 * Fixed gcc43 conversion warnings.
500 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
501 * Fix -pedantic ISO C warning about converting
502 * from function pointer to object pointer.
504 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
505 * Silence compiler warning I introduced with my last commit.
507 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
508 * Mutex protect rand() if POSIX threading
509 * is used, warn the user if that's not possible
510 * and stop using it on _WIN32 where it could
513 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
514 * Don't prevent core dumps by catching SIGABRT.
515 * It's rude and makes debugging unreasonable painful.
517 * Revision 1.110 2006/12/13 14:52:53 etresoft
518 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
520 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
521 * Privoxy is now able to run as intercepting
522 * proxy in combination with any packet filter
523 * that does the port redirection. The destination
524 * is extracted from the "Host:" header which
525 * should be available for nearly all requests.
527 * Moved HTTP snipplets into jcc.c.
528 * Added error message for gopher proxy requests.
530 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
531 * Only unlink the pidfile if it's actually used.
533 * Change order of interception checks to make
534 * it possible to block or redirect requests for
537 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
538 * Make pthread mutex locking more generic. Instead of
539 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
540 * and use mutex locking unless there is an _r function
541 * available. Better safe than sorry.
543 * Fixes "./configure --disable-pthread" and should result
544 * in less threading-related problems on pthread-using platforms,
545 * but it still doesn't fix BR#1122404.
547 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
548 * Move pthread.h inclusion from jcc.c to jcc.h.
549 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
551 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
552 * Don't exit after receiving the second SIGHUP on Solaris.
554 * Fixes BR 1052235, but the same problem may exist on other
555 * systems. Once 3.0.6 is out we should use sigset()
556 * where available and see if it breaks anything.
558 * Revision 1.104 2006/09/23 13:26:38 roro
559 * Replace TABs by spaces in source code.
561 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
562 * Fix +redirect{}. Didn't work with -fast-redirects.
564 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
565 * Respond with 400 and a short text message
566 * if the client tries to use Privoxy as FTP proxy.
568 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
569 * Make number of retries in case of forwarded-connect problems
570 * a config file option (forwarded-connect-retries) and use 0 as
573 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
574 * Set random(3) seed.
576 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
577 * Follow the OpenBSD port's lead and protect the resolve
578 * functions on OpenBSD as well.
580 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
581 * --user fix. Only use the user as group if no group is specified.
582 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
584 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
585 * Windows service (re-)integration
589 * --install[:service_name]
590 * --uninstall[:service_name]
593 * They work as follows:
594 * --install will create a service for you and then terminate.
595 * By default the service name will be "privoxy" (without the quotes).
596 * However you can run multiple services if you wish, just by adding
597 * a colon and then a name (no spaces).
599 * --uninstall follows the exact same rules a --install.
601 * --service is used when the program is executed by the service
602 * control manager, and in normal circumstances would never be
603 * used as a command line argument.
605 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
606 * Windows service integration
608 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
609 * Incorporate Fabian Keil's patch work:
610 http://www.fabiankeil.de/sourcecode/privoxy/
612 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
613 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
614 * with what was really the latest development (the v_3_0_branch branch)
616 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
617 * Thanks to Jindrich Makovicka for a race condition fix for the log
618 * file. The race condition remains for non-pthread implementations.
619 * Reference patch #1175720.
621 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
622 * Add the ability to check jpeg images for invalid
623 * lengths of comment blocks. Defensive strategy
624 * against the exploit:
625 * Microsoft Security Bulletin MS04-028
626 * Buffer Overrun in JPEG Processing (GDI+) Could
627 * Allow Code Execution (833987)
628 * Enabled with +inspect-jpegs in actions files.
630 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
631 * - Fixed usage info for non-unix platforms
632 * - Fixed small cmdline parsing bug
634 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
635 * Diagnostics: Now preserve the returncode of pthread_create
636 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
638 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
639 * No longer ignore SIGCHLD. Fixes bug #769381
641 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
642 * Close jarfile on graceful exit, remove stray line
644 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
645 * Cosmetics: Killed a warning, a typo and an allocation left at exit
647 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
648 * No longer rely on non-POSIX.1 extensions of getcwd().
651 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
652 * Replaced setenv() by posix-compliant putenv()
653 * Thanks to Neil McCalden (nmcc AT users.sf.net).
655 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
656 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
658 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
659 * Clean-up and extension of improvements for forked mode:
660 * - Child's return code now consists of flags RC_FLAG_*
661 * - Reporting toggle to parent now properly #ifdef'ed
662 * - Children now report blocking to parent. This enables
663 * statistics in forked mode
665 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
666 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
667 * Children now report having been toggled through _exit(17), parents
668 * watch for that code and toggle themselves if found.
670 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
671 * Wrapping all *_r functions (the non-_r versions of them) with
672 * mutex semaphores for OSX. Hopefully this will take care of all
673 * of those pesky crash reports.
675 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
676 * Fixed two mostly harmless mem leaks
678 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
679 * Fix: Head of global clients list now initialized to NULL
681 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
682 * Added basic support for OPTIONS and TRACE HTTP methods:
683 * - New interceptor direct_response() added in chat().
684 * - sed() moved to earlier in the process, so that the
685 * Host: header is evaluated before actions and forwarding
688 * Revision 1.92 2002/05/08 16:00:46 oes
689 * Chat's buffer handling:
690 * - Fixed bug with unchecked out-of-mem conditions
691 * while reading client request & server headers
692 * - No longer predict if the buffer limit will be exceeded
693 * in the next read -- check add_to_iob's new
694 * return code. If buffer couldn't be extended
695 * (policy or out-of-mem) while
696 * - reading from client: abort
697 * - reading server headers: send error page
698 * - buffering server body for filter: flush,
699 * and if that fails: send error page
701 * Revision 1.91 2002/04/08 20:35:58 swa
704 * Revision 1.90 2002/04/02 14:57:28 oes
705 * Made sending wafers independent of FEATURE_COOKIE_JAR
707 * Revision 1.89 2002/03/31 17:18:59 jongfoster
708 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
710 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
711 * More compiler warning message maintenance
713 * Revision 1.87 2002/03/26 22:29:54 swa
714 * we have a new homepage!
716 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
717 * Workaround for closing the jarfile before load_config() comes around again
719 * Revision 1.85 2002/03/24 15:23:33 jongfoster
722 * Revision 1.84 2002/03/24 13:25:43 swa
723 * name change related issues
725 * Revision 1.83 2002/03/16 23:54:06 jongfoster
726 * Adding graceful termination feature, to help look for memory leaks.
727 * If you enable this (which, by design, has to be done by hand
728 * editing config.h) and then go to http://i.j.b/die, then the program
729 * will exit cleanly after the *next* request. It should free all the
730 * memory that was used.
732 * Revision 1.82 2002/03/13 00:27:05 jongfoster
735 * Revision 1.81 2002/03/12 01:42:50 oes
736 * Introduced modular filters
738 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
739 * OS/2 port maintenance:
740 * - Fixed EMX build - it had decayed a little
741 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
742 * substituted a memset for now.
744 * Revision 1.79 2002/03/09 20:03:52 jongfoster
745 * - Making various functions return int rather than size_t.
746 * (Undoing a recent change). Since size_t is unsigned on
747 * Windows, functions like read_socket that return -1 on
748 * error cannot return a size_t.
750 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
751 * crashes, and also frequently caused JB to jump to 100%
752 * CPU and stay there. (Because it thought it had just
753 * read ((unsigned)-1) == 4Gb of data...)
755 * - The signature of write_socket has changed, it now simply
756 * returns success=0/failure=nonzero.
758 * - Trying to get rid of a few warnings --with-debug on
759 * Windows, I've introduced a new type "jb_socket". This is
760 * used for the socket file descriptors. On Windows, this
761 * is SOCKET (a typedef for unsigned). Everywhere else, it's
762 * an int. The error value can't be -1 any more, so it's
763 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
764 * Windows it maps to the #define INVALID_SOCKET.)
766 * - The signature of bind_port has changed.
768 * Revision 1.78 2002/03/08 21:35:04 oes
769 * Added optional group supplement to --user option. Will now use default group of user if no group given
771 * Revision 1.77 2002/03/07 03:52:06 oes
772 * - Fixed compiler warnings etc
773 * - Improved handling of failed DNS lookups
775 * Revision 1.76 2002/03/06 22:54:35 jongfoster
776 * Automated function-comment nitpicking.
778 * Revision 1.75 2002/03/06 10:02:19 oes
779 * Fixed stupid bug when --user was not given
781 * Revision 1.74 2002/03/06 00:49:31 jongfoster
782 * Fixing warning on Windows
783 * Making #ifdefs that refer to the same variable consistently
784 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
786 * Revision 1.73 2002/03/05 23:57:30 hal9
787 * Stray character 's' on line 1618 was breaking build.
789 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
790 * - Re-enable OS/2 building after new parms were added
791 * - Fix false out of memory report when resolving CGI templates when no IP
792 * address is available of failed attempt (a la no such domain)
794 * Revision 1.71 2002/03/05 18:13:56 oes
795 * Added --user option
797 * Revision 1.70 2002/03/05 04:52:42 oes
798 * Deleted non-errlog debugging code
800 * Revision 1.69 2002/03/04 23:50:00 jongfoster
801 * Splitting off bind_port() call into bind_port_helper(), with
804 * Revision 1.68 2002/03/04 20:17:32 oes
807 * Revision 1.67 2002/03/04 18:18:57 oes
808 * - Removed _DEBUG mode
809 * - Cleand up cmdline parsing
810 * - Introduced --no-daemon, --pidfile options
811 * - Cleaned up signal handling:
812 * - Terminate cleanly on INT, TERM and ABRT
813 * - Schedule logfile for re-opening on HUP
814 * - Ignore CHLD and PIPE
815 * - Leave the rest with their default handlers
816 * - Uniform handler registration
817 * - Added usage() function
818 * - Played styleguide police
820 * Revision 1.66 2002/03/03 15:06:55 oes
821 * Re-enabled automatic config reloading
823 * Revision 1.65 2002/03/03 14:49:11 oes
824 * Fixed CLF logging: Now uses client's original HTTP request
826 * Revision 1.64 2002/03/03 09:18:03 joergs
827 * Made jumbjuster work on AmigaOS again.
829 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
830 * Clean up a little CRLF unpleasantness that suddenly appeared
832 * Revision 1.62 2002/02/20 23:17:23 jongfoster
833 * Detecting some out-of memory conditions and exiting with a log message.
835 * Revision 1.61 2002/01/17 21:01:52 jongfoster
836 * Moving all our URL and URL pattern parsing code to urlmatch.c.
838 * Revision 1.60 2001/12/30 14:07:32 steudten
839 * - Add signal handling (unix)
840 * - Add SIGHUP handler (unix)
841 * - Add creation of pidfile (unix)
842 * - Add action 'top' in rc file (RH)
843 * - Add entry 'SIGNALS' to manpage
844 * - Add exit message to logfile (unix)
846 * Revision 1.59 2001/12/13 14:07:18 oes
847 * Fixed Bug: 503 error page now sent OK
849 * Revision 1.58 2001/11/30 23:37:24 jongfoster
850 * Renaming the Win32 config file to config.txt - this is almost the
851 * same as the corresponding UNIX name "config"
853 * Revision 1.57 2001/11/16 00:47:43 jongfoster
854 * Changing the tty-disconnection code to use setsid().
856 * Revision 1.56 2001/11/13 20:20:54 jongfoster
857 * Tabs->spaces, fixing a bug with missing {} around an if()
859 * Revision 1.55 2001/11/13 20:14:53 jongfoster
860 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
862 * Revision 1.54 2001/11/07 00:03:14 steudten
863 * Give reliable return value if an error
864 * occurs not just 0 with new daemon mode.
866 * Revision 1.53 2001/11/05 21:41:43 steudten
867 * Add changes to be a real daemon just for unix os.
868 * (change cwd to /, detach from controlling tty, set
869 * process group and session leader to the own process.
871 * Add some fatal-error log message for failed malloc().
872 * Add '-d' if compiled with 'configure --with-debug' to
873 * enable debug output.
875 * Revision 1.52 2001/10/26 20:11:20 jongfoster
876 * Fixing type mismatch
878 * Revision 1.51 2001/10/26 17:38:28 oes
881 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
882 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
883 * threads to call select() simultaneously. So, it's time to do a real, live,
884 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
885 * (native). Both versions will work, but using __OS2__ offers multi-threading.
887 * Revision 1.49 2001/10/23 21:41:35 jongfoster
888 * Added call to initialize the (statically-allocated of course)
889 * "out of memory" CGI response.
891 * Revision 1.48 2001/10/10 19:56:46 jongfoster
892 * Moving some code that wasn't cookie-related out of an #ifdef
895 * Revision 1.47 2001/10/10 16:44:36 oes
896 * Added CONNECT destination port limitation check
898 * Revision 1.46 2001/10/08 15:17:41 oes
899 * Re-enabled SSL forwarding
901 * Revision 1.45 2001/10/07 15:42:11 oes
902 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
904 * Moved downgrading of the HTTP version from parse_http_request to
905 * chat(), since we can't decide if it is necessary before we have
906 * determined the actions for the URL. The HTTP command is now
907 * *always* re-built so the repairs need no longer be special-cased.
909 * filter_popups now gets a csp pointer so it can raise the new
910 * CSP_FLAG_MODIFIED flag.
914 * Added configurable size limit for the IOB. If the IOB grows so
915 * large that the next read would exceed the limit, the header
916 * is generated, and the header & unfiltered buffer are flushed
917 * to the client. Chat then continues in non-buffering,
918 * non-filtering body mode.
920 * Revision 1.44 2001/10/02 18:13:57 oes
923 * Revision 1.43 2001/10/02 15:32:13 oes
924 * Moved generation of hdr
926 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
927 * Cleaning up 2 compiler warnings on OS/2.
929 * Revision 1.41 2001/09/16 17:05:14 jongfoster
930 * Removing unused #include showarg.h
932 * Revision 1.40 2001/09/16 15:41:45 jongfoster
933 * Fixing signed/unsigned comparison warning.
935 * Revision 1.39 2001/09/16 13:21:27 jongfoster
936 * Changes to use new list functions.
938 * Revision 1.38 2001/09/16 13:01:46 jongfoster
939 * Removing redundant function call that zeroed zalloc()'d memory.
941 * Revision 1.37 2001/09/10 11:12:24 oes
942 * Deleted unused variable
944 * Revision 1.36 2001/09/10 10:56:15 oes
945 * Silenced compiler warnings
947 * Revision 1.35 2001/07/31 14:44:22 oes
948 * Deleted unused size parameter from filter_popups()
950 * Revision 1.34 2001/07/30 22:08:36 jongfoster
951 * Tidying up #defines:
952 * - All feature #defines are now of the form FEATURE_xxx
953 * - Permanently turned off WIN_GUI_EDIT
954 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
956 * Revision 1.33 2001/07/29 19:32:00 jongfoster
957 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
959 * Revision 1.32 2001/07/29 18:47:05 jongfoster
960 * Adding missing #include "loadcfg.h"
962 * Revision 1.31 2001/07/29 12:17:48 oes
963 * Applied pthread fix by Paul Lieverse
965 * Revision 1.30 2001/07/25 22:57:13 jongfoster
966 * __BEOS__ no longer overrides FEATURE_PTHREAD.
967 * This is because FEATURE_PTHREAD will soon be widely used, so I
968 * want to keep it simple.
970 * Revision 1.29 2001/07/24 12:47:06 oes
971 * Applied BeOS support update by Eugenia
973 * Revision 1.28 2001/07/23 13:26:12 oes
974 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
976 * Revision 1.27 2001/07/19 19:09:47 haroon
977 * - Added code to take care of the situation where while processing the first
978 * server response (which includes the server header), after finding the end
979 * of the headers we were not looking past the end of the headers for
980 * content modification. I enabled it for filter_popups.
981 * Someone else should look to see if other similar operations should be
982 * done to the discarded portion of the buffer.
984 * Note 2001/07/20: No, the other content modification mechanisms will process
985 * the whole iob later anyway. --oes
987 * Revision 1.26 2001/07/18 12:31:36 oes
990 * Revision 1.25 2001/07/15 19:43:49 jongfoster
991 * Supports POSIX threads.
992 * Also removed some unused #includes.
994 * Revision 1.24 2001/07/13 14:00:40 oes
995 * - Generic content modification scheme:
996 * Each feature has its own applicability flag that is set
997 * from csp->action->flags.
998 * Replaced the "filtering" int flag , by a function pointer
999 * "content_filter" to the function that will do the content
1000 * modification. If it is != NULL, the document will be buffered
1001 * and processed through *content_filter, which must set
1002 * csp->content_length and return a modified copy of the body
1003 * or return NULL (on failiure).
1004 * - Changed csp->is_text to the more generic bitmap csp->content_type
1005 * which can currently take the valued CT_TEXT or CT_GIF
1006 * - Reformatting etc
1007 * - Removed all #ifdef PCRS
1009 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
1010 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
1011 * the `block_acl' call. This prevents a compilation error when the user
1012 * does not wish to use the "ACL" feature.
1014 * Revision 1.22 2001/06/29 21:45:41 oes
1015 * Indentation, CRLF->LF, Tab-> Space
1017 * Revision 1.21 2001/06/29 13:29:36 oes
1018 * - Cleaned up, improved comments
1019 * - Unified all possible interceptors (CGI,
1020 * block, trust, fast_redirect) in one
1021 * place, with one (CGI) answer generation
1022 * mechansim. Much clearer now.
1023 * - Removed the GIF image generation, which
1024 * is now done in filters.c:block_url()
1025 * - Made error conditions like domain lookup
1026 * failiure or (various) problems while talking
1027 * to the server use cgi.c:error_response()
1028 * instead of generating HTML/HTTP in chat() (yuck!)
1029 * - Removed logentry from cancelled commit
1031 * Revision 1.20 2001/06/09 10:55:28 jongfoster
1032 * Changing BUFSIZ ==> BUFFER_SIZE
1034 * Revision 1.19 2001/06/07 23:12:52 jongfoster
1035 * Replacing function pointer in struct gateway with a directly
1036 * called function forwarded_connect().
1037 * Replacing struct gateway with struct forward_spec
1039 * Revision 1.18 2001/06/03 19:12:16 oes
1040 * introduced new cgi handling
1042 * Revision 1.17 2001/06/01 20:07:23 jongfoster
1043 * Now uses action +image-blocker{} rather than config->tinygif
1045 * Revision 1.16 2001/06/01 18:49:17 jongfoster
1046 * Replaced "list_share" with "list" - the tiny memory gain was not
1047 * worth the extra complexity.
1049 * Revision 1.15 2001/05/31 21:24:47 jongfoster
1050 * Changed "permission" to "action" throughout.
1051 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
1052 * Moved vanilla wafer check into chat(), since we must now
1053 * decide whether or not to add it based on the URL.
1055 * Revision 1.14 2001/05/29 20:14:01 joergs
1056 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
1059 * Revision 1.13 2001/05/29 09:50:24 jongfoster
1060 * Unified blocklist/imagelist/permissionslist.
1061 * File format is still under discussion, but the internal changes
1062 * are (mostly) done.
1064 * Also modified interceptor behaviour:
1065 * - We now intercept all URLs beginning with one of the following
1066 * prefixes (and *only* these prefixes):
1068 * * http://ijbswa.sf.net/config/
1069 * * http://ijbswa.sourceforge.net/config/
1070 * - New interceptors "home page" - go to http://i.j.b/ to see it.
1071 * - Internal changes so that intercepted and fast redirect pages
1072 * are not replaced with an image.
1073 * - Interceptors now have the option to send a binary page direct
1074 * to the client. (i.e. ijb-send-banner uses this)
1075 * - Implemented show-url-info interceptor. (Which is why I needed
1076 * the above interceptors changes - a typical URL is
1077 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
1078 * The previous mechanism would not have intercepted that, and
1079 * if it had been intercepted then it then it would have replaced
1080 * it with an image.)
1082 * Revision 1.12 2001/05/27 22:17:04 oes
1084 * - re_process_buffer no longer writes the modified buffer
1085 * to the client, which was very ugly. It now returns the
1086 * buffer, which it is then written by chat.
1088 * - content_length now adjusts the Content-Length: header
1089 * for modified documents rather than crunch()ing it.
1090 * (Length info in csp->content_length, which is 0 for
1091 * unmodified documents)
1093 * - For this to work, sed() is called twice when filtering.
1095 * Revision 1.11 2001/05/26 17:27:53 jongfoster
1096 * Added support for CLF and fixed LOG_LEVEL_LOG.
1097 * Also did CRLF->LF fix of my previous patch.
1099 * Revision 1.10 2001/05/26 15:26:15 jongfoster
1100 * ACL feature now provides more security by immediately dropping
1101 * connections from untrusted hosts.
1103 * Revision 1.9 2001/05/26 00:28:36 jongfoster
1104 * Automatic reloading of config file.
1105 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
1106 * Most of the global variables have been moved to a new
1107 * struct configuration_spec, accessed through csp->config->globalname
1108 * Most of the globals remaining are used by the Win32 GUI.
1110 * Revision 1.8 2001/05/25 22:43:18 jongfoster
1111 * Fixing minor memory leak and buffer overflow.
1113 * Revision 1.7 2001/05/25 22:34:30 jongfoster
1116 * Revision 1.6 2001/05/23 00:13:58 joergs
1117 * AmigaOS support fixed.
1119 * Revision 1.5 2001/05/22 18:46:04 oes
1121 * - Enabled filtering banners by size rather than URL
1122 * by adding patterns that replace all standard banner
1123 * sizes with the "Junkbuster" gif to the re_filterfile
1125 * - Enabled filtering WebBugs by providing a pattern
1126 * which kills all 1x1 images
1128 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
1129 * which is selected by the (nonstandard and therefore
1130 * capital) letter 'U' in the option string.
1131 * It causes the quantifiers to be ungreedy by default.
1132 * Appending a ? turns back to greedy (!).
1134 * - Added a new interceptor ijb-send-banner, which
1135 * sends back the "Junkbuster" gif. Without imagelist or
1136 * MSIE detection support, or if tinygif = 1, or the
1137 * URL isn't recognized as an imageurl, a lame HTML
1138 * explanation is sent instead.
1140 * - Added new feature, which permits blocking remote
1141 * script redirects and firing back a local redirect
1143 * The feature is conditionally compiled, i.e. it
1144 * can be disabled with --disable-fast-redirects,
1145 * plus it must be activated by a "fast-redirects"
1146 * line in the config file, has its own log level
1147 * and of course wants to be displayed by show-proxy-args
1148 * Note: Boy, all the #ifdefs in 1001 locations and
1149 * all the fumbling with configure.in and acconfig.h
1150 * were *way* more work than the feature itself :-(
1152 * - Because a generic redirect template was needed for
1153 * this, tinygif = 3 now uses the same.
1155 * - Moved GIFs, and other static HTTP response templates
1158 * - Some minor fixes
1160 * - Removed some >400 CRs again (Jon, you really worked
1163 * Revision 1.4 2001/05/21 19:34:01 jongfoster
1164 * Made failure to bind() a fatal error.
1166 * Revision 1.3 2001/05/20 01:21:20 jongfoster
1167 * Version 2.9.4 checkin.
1168 * - Merged popupfile and cookiefile, and added control over PCRS
1169 * filtering, in new "permissionsfile".
1170 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
1171 * file error you now get a message box (in the Win32 GUI) rather
1172 * than the program exiting with no explanation.
1173 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
1175 * - Removed tabs from "config"
1176 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
1177 * - Bumped up version number.
1179 * Revision 1.2 2001/05/17 22:34:44 oes
1180 * - Added hint on GIF char array generation to jcc.c
1181 * - Cleaned CRLF's from the sources and related files
1182 * - Repaired logging for REF and FRC
1184 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
1185 * Initial import of version 2.9.3 source tree
1188 *********************************************************************/
1194 #include <sys/types.h>
1203 # ifndef FEATURE_PTHREAD
1207 # include <windows.h>
1208 # include <process.h>
1209 # endif /* ndef FEATURE_PTHREAD */
1212 # ifndef _WIN_CONSOLE
1213 # include "w32log.h"
1214 # endif /* ndef _WIN_CONSOLE */
1215 # include "w32svrapi.h"
1217 #else /* ifndef _WIN32 */
1219 # if !defined (__OS2__)
1220 # include <unistd.h>
1221 # include <sys/wait.h>
1222 # endif /* ndef __OS2__ */
1223 # include <sys/time.h>
1224 # include <sys/stat.h>
1225 # include <sys/ioctl.h>
1228 #include <sys/termios.h>
1236 # include <signal.h>
1239 # include <socket.h> /* BeOS has select() for sockets only. */
1240 # include <OS.h> /* declarations for threads and stuff. */
1243 # if defined(__EMX__) || defined(__OS2__)
1244 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
1249 #define bzero(B,N) memset(B,0x00,n)
1253 # include <select.h>
1258 #include "project.h"
1261 #include "filters.h"
1262 #include "loaders.h"
1263 #include "parsers.h"
1264 #include "miscutil.h"
1266 #include "jbsockets.h"
1267 #include "gateway.h"
1268 #include "actions.h"
1270 #include "loadcfg.h"
1271 #include "urlmatch.h"
1273 const char jcc_h_rcs[] = JCC_H_VERSION;
1274 const char project_h_rcs[] = PROJECT_H_VERSION;
1277 struct client_state clients[1];
1278 struct file_list files[1];
1280 #ifdef FEATURE_STATISTICS
1281 int urls_read = 0; /* total nr of urls read inc rejected */
1282 int urls_rejected = 0; /* total nr of urls rejected */
1283 #endif /* def FEATURE_STATISTICS */
1285 #ifdef FEATURE_GRACEFUL_TERMINATION
1286 int g_terminate = 0;
1289 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1290 static void sig_handler(int the_signal);
1292 static int client_protocol_is_unsupported(const struct client_state *csp, char *req);
1293 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
1294 static jb_err get_server_headers(struct client_state *csp);
1295 static const char *crunch_reason(const struct http_response *rsp);
1296 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp);
1297 static char *get_request_line(struct client_state *csp);
1298 static jb_err receive_client_request(struct client_state *csp);
1299 static jb_err parse_client_request(struct client_state *csp);
1300 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
1301 static jb_err change_request_destination(struct client_state *csp);
1302 static void chat(struct client_state *csp);
1303 static void serve(struct client_state *csp);
1304 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1305 static void usage(const char *myname);
1307 static void initialize_mutexes(void);
1308 static jb_socket bind_port_helper(struct configuration_spec *config);
1309 static void listen_loop(void);
1312 void serve(struct client_state *csp);
1313 #else /* ifndef AMIGA */
1314 static void serve(struct client_state *csp);
1315 #endif /* def AMIGA */
1318 static int32 server_thread(void *data);
1319 #endif /* def __BEOS__ */
1322 #define sleep(N) Sleep(((N) * 1000))
1326 #define sleep(N) DosSleep(((N) * 100))
1329 #ifdef MUTEX_LOCKS_AVAILABLE
1331 * XXX: Does the locking stuff really belong in this file?
1333 privoxy_mutex_t log_mutex;
1334 privoxy_mutex_t log_init_mutex;
1335 privoxy_mutex_t connection_reuse_mutex;
1337 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
1338 privoxy_mutex_t resolver_mutex;
1339 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
1341 #ifndef HAVE_GMTIME_R
1342 privoxy_mutex_t gmtime_mutex;
1343 #endif /* ndef HAVE_GMTIME_R */
1345 #ifndef HAVE_LOCALTIME_R
1346 privoxy_mutex_t localtime_mutex;
1347 #endif /* ndef HAVE_GMTIME_R */
1350 privoxy_mutex_t rand_mutex;
1351 #endif /* ndef HAVE_RANDOM */
1353 #endif /* def MUTEX_LOCKS_AVAILABLE */
1356 const char *basedir = NULL;
1357 const char *pidfile = NULL;
1358 static int received_hup_signal = 0;
1359 #endif /* defined unix */
1361 /* HTTP snipplets. */
1362 static const char CSUCCEED[] =
1363 "HTTP/1.0 200 Connection established\r\n"
1364 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
1366 static const char CHEADER[] =
1367 "HTTP/1.0 400 Invalid header received from client\r\n"
1368 "Proxy-Agent: Privoxy " VERSION "\r\n"
1369 "Content-Type: text/plain\r\n"
1370 "Connection: close\r\n\r\n"
1371 "Invalid header received from client.\r\n";
1373 static const char FTP_RESPONSE[] =
1374 "HTTP/1.0 400 Invalid request received from client\r\n"
1375 "Content-Type: text/plain\r\n"
1376 "Connection: close\r\n\r\n"
1377 "Invalid request. Privoxy doesn't support FTP.\r\n";
1379 static const char GOPHER_RESPONSE[] =
1380 "HTTP/1.0 400 Invalid request received from client\r\n"
1381 "Content-Type: text/plain\r\n"
1382 "Connection: close\r\n\r\n"
1383 "Invalid request. Privoxy doesn't support gopher.\r\n";
1385 /* XXX: should be a template */
1386 static const char MISSING_DESTINATION_RESPONSE[] =
1387 "HTTP/1.0 400 Bad request received from client\r\n"
1388 "Proxy-Agent: Privoxy " VERSION "\r\n"
1389 "Content-Type: text/plain\r\n"
1390 "Connection: close\r\n\r\n"
1391 "Bad request. Privoxy was unable to extract the destination.\r\n";
1393 /* XXX: should be a template */
1394 static const char NO_SERVER_DATA_RESPONSE[] =
1395 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1396 "Proxy-Agent: Privoxy " VERSION "\r\n"
1397 "Content-Type: text/plain\r\n"
1398 "Connection: close\r\n\r\n"
1399 "Empty server or forwarder response.\r\n"
1400 "The connection has been closed but Privoxy didn't receive any data.\r\n";
1402 /* XXX: should be a template */
1403 static const char INVALID_SERVER_HEADERS_RESPONSE[] =
1404 "HTTP/1.0 502 Server or forwarder response invalid\r\n"
1405 "Proxy-Agent: Privoxy " VERSION "\r\n"
1406 "Content-Type: text/plain\r\n"
1407 "Connection: close\r\n\r\n"
1408 "Bad response. The server or forwarder response doesn't look like HTTP.\r\n";
1411 /* XXX: should be a template */
1412 static const char NULL_BYTE_RESPONSE[] =
1413 "HTTP/1.0 400 Bad request received from client\r\n"
1414 "Proxy-Agent: Privoxy " VERSION "\r\n"
1415 "Content-Type: text/plain\r\n"
1416 "Connection: close\r\n\r\n"
1417 "Bad request. Null byte(s) before end of request.\r\n";
1420 /* XXX: should be a template */
1421 static const char MESSED_UP_REQUEST_RESPONSE[] =
1422 "HTTP/1.0 400 Malformed request after rewriting\r\n"
1423 "Proxy-Agent: Privoxy " VERSION "\r\n"
1424 "Content-Type: text/plain\r\n"
1425 "Connection: close\r\n\r\n"
1426 "Bad request. Messed up with header filters.\r\n";
1428 /* XXX: should be a template */
1429 static const char CONNECTION_TIMEOUT_RESPONSE[] =
1430 "HTTP/1.0 502 Connection timeout\r\n"
1431 "Proxy-Agent: Privoxy " VERSION "\r\n"
1432 "Content-Type: text/plain\r\n"
1433 "Connection: close\r\n\r\n"
1434 "The connection timed out.\r\n";
1436 /* A function to crunch a response */
1437 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
1439 /* Crunch function flags */
1440 #define CF_NO_FLAGS 0
1441 /* Cruncher applies to forced requests as well */
1442 #define CF_IGNORE_FORCE 1
1443 /* Crunched requests are counted for the block statistics */
1444 #define CF_COUNT_AS_REJECT 2
1446 /* A crunch function and its flags */
1449 const crunch_func_ptr cruncher;
1453 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
1455 /* Complete list of cruncher functions */
1456 static const struct cruncher crunchers_all[] = {
1457 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
1458 { block_url, CF_COUNT_AS_REJECT },
1459 #ifdef FEATURE_TRUST
1460 { trust_url, CF_COUNT_AS_REJECT },
1461 #endif /* def FEATURE_TRUST */
1462 { redirect_url, CF_NO_FLAGS },
1463 { dispatch_cgi, CF_IGNORE_FORCE},
1467 /* Light version, used after tags are applied */
1468 static const struct cruncher crunchers_light[] = {
1469 { block_url, CF_COUNT_AS_REJECT },
1470 { redirect_url, CF_NO_FLAGS },
1476 * XXX: Don't we really mean
1482 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1483 /*********************************************************************
1485 * Function : sig_handler
1487 * Description : Signal handler for different signals.
1488 * Exit gracefully on TERM and INT
1489 * or set a flag that will cause the errlog
1490 * to be reopened by the main thread on HUP.
1493 * 1 : the_signal = the signal cause this function to call
1497 *********************************************************************/
1498 static void sig_handler(int the_signal)
1504 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1516 received_hup_signal = 1;
1522 * We shouldn't be here, unless we catch signals
1523 * in main() that we can't handle here!
1525 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1533 /*********************************************************************
1535 * Function : client_protocol_is_unsupported
1537 * Description : Checks if the client used a known unsupported
1538 * protocol and deals with it by sending an error
1542 * 1 : csp = Current client state (buffers, headers, etc...)
1543 * 2 : req = the first request line send by the client
1545 * Returns : TRUE if an error response has been generated, or
1546 * FALSE if the request doesn't look invalid.
1548 *********************************************************************/
1549 static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1552 * If it's a FTP or gopher request, we don't support it.
1554 * These checks are better than nothing, but they might
1555 * not work in all configurations and some clients might
1556 * have problems digesting the answer.
1558 * They should, however, never cause more problems than
1559 * Privoxy's old behaviour (returning the misleading HTML
1562 * "Could not resolve http://(ftp|gopher)://example.org").
1564 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1566 const char *response = NULL;
1567 const char *protocol = NULL;
1569 if (!strncmpic(req, "GET ftp://", 10))
1571 response = FTP_RESPONSE;
1576 response = GOPHER_RESPONSE;
1577 protocol = "GOPHER";
1579 log_error(LOG_LEVEL_ERROR,
1580 "%s tried to use Privoxy as %s proxy: %s",
1581 csp->ip_addr_str, protocol, req);
1582 log_error(LOG_LEVEL_CLF,
1583 "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1585 write_socket(csp->cfd, response, strlen(response));
1594 /*********************************************************************
1596 * Function : get_request_destination_elsewhere
1598 * Description : If the client's request was redirected into
1599 * Privoxy without the client's knowledge,
1600 * the request line lacks the destination host.
1602 * This function tries to get it elsewhere,
1603 * provided accept-intercepted-requests is enabled.
1605 * "Elsewhere" currently only means "Host: header",
1606 * but in the future we may ask the redirecting
1607 * packet filter to look the destination up.
1609 * If the destination stays unknown, an error
1610 * response is send to the client and headers
1611 * are freed so that chat() can return directly.
1614 * 1 : csp = Current client state (buffers, headers, etc...)
1615 * 2 : headers = a header list
1617 * Returns : JB_ERR_OK if the destination is now known, or
1618 * JB_ERR_PARSE if it isn't.
1620 *********************************************************************/
1621 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1625 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1627 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1628 " Privoxy isn't configured to accept intercepted requests.",
1629 csp->ip_addr_str, csp->http->cmd);
1630 /* XXX: Use correct size */
1631 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1632 csp->ip_addr_str, csp->http->cmd);
1634 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1635 destroy_list(headers);
1637 return JB_ERR_PARSE;
1639 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1641 /* Split the domain we just got for pattern matching */
1642 init_domain_components(csp->http);
1648 /* We can't work without destination. Go spread the news.*/
1650 req = list_to_text(headers);
1652 /* XXX: Use correct size */
1653 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1654 csp->ip_addr_str, csp->http->cmd);
1655 log_error(LOG_LEVEL_ERROR,
1656 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1657 csp->ip_addr_str, csp->http->cmd, req);
1660 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
1661 destroy_list(headers);
1663 return JB_ERR_PARSE;
1666 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1667 * to get the destination IP address, use it as host directly
1668 * or do a reverse DNS lookup first.
1673 /*********************************************************************
1675 * Function : get_server_headers
1677 * Description : Parses server headers in iob and fills them
1678 * into csp->headers so that they can later be
1682 * 1 : csp = Current client state (buffers, headers, etc...)
1684 * Returns : JB_ERR_OK if everything went fine, or
1685 * JB_ERR_PARSE if the headers were incomplete.
1687 *********************************************************************/
1688 static jb_err get_server_headers(struct client_state *csp)
1690 int continue_hack_in_da_house = 0;
1693 while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
1698 * continue hack in da house. Ignore the ending of
1699 * this head and continue enlisting header lines.
1700 * The reason is described below.
1702 enlist(csp->headers, "");
1703 continue_hack_in_da_house = 0;
1706 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1709 * It's a bodyless continue response, don't
1710 * stop header parsing after reaching its end.
1712 * As a result Privoxy will concatenate the
1713 * next response's head and parse and deliver
1714 * the headers as if they belonged to one request.
1716 * The client will separate them because of the
1717 * empty line between them.
1719 * XXX: What we're doing here is clearly against
1720 * the intended purpose of the continue header,
1721 * and under some conditions (HTTP/1.0 client request)
1722 * it's a standard violation.
1724 * Anyway, "sort of against the spec" is preferable
1725 * to "always getting confused by Continue responses"
1726 * (Privoxy's behaviour before this hack was added)
1728 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1729 continue_hack_in_da_house = 1;
1731 else if (*header == '\0')
1734 * If the header is empty, but the Continue hack
1735 * isn't active, we can assume that we reached the
1736 * end of the buffer before we hit the end of the
1739 * Inform the caller an let it decide how to handle it.
1741 return JB_ERR_PARSE;
1744 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1747 * XXX: Should we quit the request and return a
1748 * out of memory error page instead?
1750 log_error(LOG_LEVEL_ERROR,
1751 "Out of memory while enlisting server headers. %s lost.",
1761 /*********************************************************************
1763 * Function : crunch_reason
1765 * Description : Translates the crunch reason code into a string.
1768 * 1 : rsp = a http_response
1770 * Returns : A string with the crunch reason or an error description.
1772 *********************************************************************/
1773 static const char *crunch_reason(const struct http_response *rsp)
1775 char * reason = NULL;
1777 assert(rsp != NULL);
1780 return "Internal error while searching for crunch reason";
1783 switch (rsp->reason)
1785 case RSP_REASON_UNSUPPORTED:
1786 reason = "Unsupported HTTP feature";
1788 case RSP_REASON_BLOCKED:
1791 case RSP_REASON_UNTRUSTED:
1792 reason = "Untrusted";
1794 case RSP_REASON_REDIRECTED:
1795 reason = "Redirected";
1797 case RSP_REASON_CGI_CALL:
1798 reason = "CGI Call";
1800 case RSP_REASON_NO_SUCH_DOMAIN:
1801 reason = "DNS failure";
1803 case RSP_REASON_FORWARDING_FAILED:
1804 reason = "Forwarding failed";
1806 case RSP_REASON_CONNECT_FAILED:
1807 reason = "Connection failure";
1809 case RSP_REASON_OUT_OF_MEMORY:
1810 reason = "Out of memory (may mask other reasons)";
1813 reason = "No reason recorded";
1821 /*********************************************************************
1823 * Function : send_crunch_response
1825 * Description : Delivers already prepared response for
1826 * intercepted requests, logs the interception
1827 * and frees the response.
1830 * 1 : csp = Current client state (buffers, headers, etc...)
1831 * 1 : rsp = Fully prepared response. Will be freed on exit.
1833 * Returns : Nothing.
1835 *********************************************************************/
1836 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp)
1838 const struct http_request *http = csp->http;
1839 char status_code[4];
1841 assert(rsp != NULL);
1842 assert(rsp->head != NULL);
1847 * Not supposed to happen. If it does
1848 * anyway, treat it as an unknown error.
1850 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1851 /* return code doesn't matter */
1856 /* If rsp is still NULL, we have serious internal problems. */
1857 log_error(LOG_LEVEL_FATAL,
1858 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1862 * Extract the status code from the actual head
1863 * that was send to the client. It is the only
1864 * way to get it right for all requests, including
1865 * the fixed ones for out-of-memory problems.
1867 * A head starts like this: 'HTTP/1.1 200...'
1871 status_code[0] = rsp->head[9];
1872 status_code[1] = rsp->head[10];
1873 status_code[2] = rsp->head[11];
1874 status_code[3] = '\0';
1876 /* Write the answer to the client */
1877 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1878 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1880 /* There is nothing we can do about it. */
1881 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1884 /* Log that the request was crunched and why. */
1885 log_error(LOG_LEVEL_CRUNCH, "%s: %s", crunch_reason(rsp), http->url);
1886 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %d",
1887 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1889 /* Clean up and return */
1890 if (cgi_error_memory() != rsp)
1892 free_http_response(rsp);
1899 /*********************************************************************
1901 * Function : request_contains_null_bytes
1903 * Description : Checks for NULL bytes in the request and sends
1904 * an error message to the client if any were found.
1906 * XXX: currently not used, see comment in chat().
1909 * 1 : csp = Current client state (buffers, headers, etc...)
1910 * 2 : buf = Data from the client's request to check.
1911 * 3 : len = The data length.
1913 * Returns : TRUE if the request contained one or more NULL bytes, or
1916 *********************************************************************/
1917 static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1919 size_t c_len; /* Request lenght when treated as C string */
1921 c_len = strlen(buf);
1926 * Null byte(s) found. Log the request,
1927 * return an error response and hang up.
1929 size_t tmp_len = c_len;
1934 * Replace NULL byte(s) with '°' characters
1935 * so the request can be logged as string.
1936 * XXX: Is there a better replacement character?
1939 tmp_len += strlen(buf+tmp_len);
1940 } while (tmp_len < len);
1942 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1943 "(length=%d, strlen=%d).", csp->ip_addr_str, len, c_len);
1944 log_error(LOG_LEVEL_HEADER,
1945 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1947 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
1949 /* XXX: Log correct size */
1950 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1960 /*********************************************************************
1962 * Function : crunch_response_triggered
1964 * Description : Checks if the request has to be crunched,
1965 * and delivers the crunch response if necessary.
1968 * 1 : csp = Current client state (buffers, headers, etc...)
1969 * 2 : crunchers = list of cruncher functions to run
1971 * Returns : TRUE if the request was answered with a crunch response
1974 *********************************************************************/
1975 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
1977 struct http_response *rsp = NULL;
1978 const struct cruncher *c;
1981 * If CGI request crunching is disabled,
1982 * check the CGI dispatcher out of order to
1983 * prevent unintentional blocks or redirects.
1985 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
1986 && (NULL != (rsp = dispatch_cgi(csp))))
1988 /* Deliver, log and free the interception response. */
1989 send_crunch_response(csp, rsp);
1993 for (c = crunchers; c->cruncher != NULL; c++)
1996 * Check the cruncher if either Privoxy is toggled
1997 * on and the request isn't forced, or if the cruncher
1998 * applies to forced requests as well.
2000 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
2001 !(csp->flags & CSP_FLAG_FORCED)) ||
2002 (c->flags & CF_IGNORE_FORCE))
2004 rsp = c->cruncher(csp);
2007 /* Deliver, log and free the interception response. */
2008 send_crunch_response(csp, rsp);
2009 #ifdef FEATURE_STATISTICS
2010 if (c->flags & CF_COUNT_AS_REJECT)
2012 csp->flags |= CSP_FLAG_REJECTED;
2014 #endif /* def FEATURE_STATISTICS */
2025 /*********************************************************************
2027 * Function : build_request_line
2029 * Description : Builds the HTTP request line.
2031 * If a HTTP forwarder is used it expects the whole URL,
2032 * web servers only get the path.
2035 * 1 : csp = Current client state (buffers, headers, etc...)
2036 * 2 : fwd = The forwarding spec used for the request
2037 * XXX: Should use http->fwd instead.
2038 * 3 : request_line = The old request line which will be replaced.
2040 * Returns : Nothing. Terminates in case of memory problems.
2042 *********************************************************************/
2043 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
2045 struct http_request *http = csp->http;
2047 assert(http->ssl == 0);
2050 * Downgrade http version from 1.1 to 1.0
2051 * if +downgrade action applies.
2053 if ( (csp->action->flags & ACTION_DOWNGRADE)
2054 && (!strcmpic(http->ver, "HTTP/1.1")))
2057 http->ver = strdup("HTTP/1.0");
2059 if (http->ver == NULL)
2061 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
2066 * Rebuild the request line.
2068 freez(*request_line);
2069 *request_line = strdup(http->gpc);
2070 string_append(request_line, " ");
2072 if (fwd->forward_host)
2074 string_append(request_line, http->url);
2078 string_append(request_line, http->path);
2080 string_append(request_line, " ");
2081 string_append(request_line, http->ver);
2083 if (*request_line == NULL)
2085 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
2087 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
2091 /*********************************************************************
2093 * Function : change_request_destination
2095 * Description : Parse a (rewritten) request line and regenerate
2096 * the http request data.
2099 * 1 : csp = Current client state (buffers, headers, etc...)
2101 * Returns : Forwards the parse_http_request() return code.
2102 * Terminates in case of memory problems.
2104 *********************************************************************/
2105 static jb_err change_request_destination(struct client_state *csp)
2107 struct http_request *http = csp->http;
2110 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
2111 free_http_request(http);
2112 err = parse_http_request(csp->headers->first->str, http, csp);
2113 if (JB_ERR_OK != err)
2115 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
2116 jb_err_to_string(err));
2120 /* XXX: ocmd is a misleading name */
2121 http->ocmd = strdup(http->cmd);
2122 if (http->ocmd == NULL)
2124 log_error(LOG_LEVEL_FATAL,
2125 "Out of memory copying rewritten HTTP request line");
2133 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2134 /*********************************************************************
2136 * Function : server_response_is_complete
2138 * Description : Determines whether we should stop reading
2139 * from the server socket.
2142 * 1 : csp = Current client state (buffers, headers, etc...)
2143 * 2 : content_length = Length of content received so far.
2145 * Returns : TRUE if the response is complete,
2148 *********************************************************************/
2149 static int server_response_is_complete(struct client_state *csp, size_t content_length)
2151 int content_length_known = (csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
2153 if (!strcmpic(csp->http->gpc, "HEAD"))
2156 * "HEAD" implies no body, we are thus expecting
2157 * no content. XXX: incomplete "list" of methods?
2159 csp->expected_content_length = 0;
2160 content_length_known = TRUE;
2163 if (csp->http->status == 304)
2166 * Expect no body. XXX: incomplete "list" of status codes?
2168 csp->expected_content_length = 0;
2169 content_length_known = TRUE;
2172 return (content_length_known && ((0 == csp->expected_content_length)
2173 || (csp->expected_content_length <= content_length)));
2177 /*********************************************************************
2179 * Function : wait_for_alive_connections
2181 * Description : Waits for alive connections to timeout.
2187 *********************************************************************/
2188 static void wait_for_alive_connections()
2190 int connections_alive = close_unusable_connections();
2192 while (0 < connections_alive)
2194 log_error(LOG_LEVEL_CONNECT,
2195 "Waiting for %d connections to timeout.",
2198 connections_alive = close_unusable_connections();
2201 log_error(LOG_LEVEL_CONNECT, "No connections to wait for left.");
2204 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2207 /*********************************************************************
2209 * Function : mark_server_socket_tainted
2211 * Description : Makes sure we don't reuse a server socket
2212 * (if we didn't read everything the server sent
2213 * us reusing the socket would lead to garbage).
2216 * 1 : csp = Current client state (buffers, headers, etc...)
2220 *********************************************************************/
2221 static void mark_server_socket_tainted(struct client_state *csp)
2223 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
2225 log_error(LOG_LEVEL_CONNECT, "Unsetting keep-alive flag.");
2226 csp->flags &= ~CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE;
2230 /*********************************************************************
2232 * Function : get_request_line
2234 * Description : Read the client request line.
2237 * 1 : csp = Current client state (buffers, headers, etc...)
2239 * Returns : Pointer to request line or NULL in case of errors.
2241 *********************************************************************/
2242 static char *get_request_line(struct client_state *csp)
2244 char buf[BUFFER_SIZE];
2245 char *request_line = NULL;
2248 memset(buf, 0, sizeof(buf));
2252 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
2254 log_error(LOG_LEVEL_ERROR,
2255 "Stopped waiting for the request line.");
2256 write_socket(csp->cfd, CONNECTION_TIMEOUT_RESPONSE,
2257 strlen(CONNECTION_TIMEOUT_RESPONSE));
2261 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2263 if (len <= 0) return NULL;
2266 * If there is no memory left for buffering the
2267 * request, there is nothing we can do but hang up
2269 if (add_to_iob(csp, buf, len))
2274 request_line = get_header(csp->iob);
2276 } while ((NULL != request_line) && ('\0' == *request_line));
2278 return request_line;
2283 /*********************************************************************
2285 * Function : receive_client_request
2287 * Description : Read the client's request (more precisely the
2288 * client headers) and answer it if necessary.
2290 * Note that since we're not using select() we could get
2291 * blocked here if a client connected, then didn't say
2295 * 1 : csp = Current client state (buffers, headers, etc...)
2297 * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
2299 *********************************************************************/
2300 static jb_err receive_client_request(struct client_state *csp)
2302 char buf[BUFFER_SIZE];
2305 struct http_request *http;
2309 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
2310 struct list header_list;
2311 struct list *headers = &header_list;
2315 memset(buf, 0, sizeof(buf));
2317 req = get_request_line(csp);
2320 return JB_ERR_PARSE;
2322 assert(*req != '\0');
2324 if (client_protocol_is_unsupported(csp, req))
2326 return JB_ERR_PARSE;
2329 #ifdef FEATURE_FORCE_LOAD
2331 * If this request contains the FORCE_PREFIX and blocks
2332 * aren't enforced, get rid of it and set the force flag.
2334 if (strstr(req, FORCE_PREFIX))
2336 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
2338 log_error(LOG_LEVEL_FORCE,
2339 "Ignored force prefix in request: \"%s\".", req);
2343 strclean(req, FORCE_PREFIX);
2344 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
2345 csp->flags |= CSP_FLAG_FORCED;
2348 #endif /* def FEATURE_FORCE_LOAD */
2350 err = parse_http_request(req, http, csp);
2352 if (JB_ERR_OK != err)
2354 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
2355 /* XXX: Use correct size */
2356 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2357 log_error(LOG_LEVEL_ERROR,
2358 "Couldn't parse request line received from %s: %s",
2359 csp->ip_addr_str, jb_err_to_string(err));
2361 free_http_request(http);
2362 return JB_ERR_PARSE;
2365 /* grab the rest of the client's headers */
2369 p = get_header(csp->iob);
2373 /* There are no additional headers to read. */
2380 * We didn't receive a complete header
2381 * line yet, get the rest of it.
2383 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
2385 log_error(LOG_LEVEL_ERROR,
2386 "Stopped grabbing the client headers.");
2387 return JB_ERR_PARSE;
2390 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2393 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
2394 destroy_list(headers);
2395 return JB_ERR_PARSE;
2398 if (add_to_iob(csp, buf, len))
2401 * If there is no memory left for buffering the
2402 * request, there is nothing we can do but hang up
2404 destroy_list(headers);
2405 return JB_ERR_MEMORY;
2411 * We were able to read a complete
2412 * header and can finaly enlist it.
2419 if (http->host == NULL)
2422 * If we still don't know the request destination,
2423 * the request is invalid or the client uses
2424 * Privoxy without its knowledge.
2426 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
2429 * Our attempts to get the request destination
2430 * elsewhere failed or Privoxy is configured
2431 * to only accept proxy requests.
2433 * An error response has already been send
2434 * and we're done here.
2436 return JB_ERR_PARSE;
2441 * Determine the actions for this URL
2443 #ifdef FEATURE_TOGGLE
2444 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
2446 /* Most compatible set of actions (i.e. none) */
2447 init_current_action(csp->action);
2450 #endif /* ndef FEATURE_TOGGLE */
2452 get_url_actions(csp, http);
2456 * Save a copy of the original request for logging
2458 http->ocmd = strdup(http->cmd);
2459 if (http->ocmd == NULL)
2461 log_error(LOG_LEVEL_FATAL,
2462 "Out of memory copying HTTP request line");
2464 enlist(csp->headers, http->cmd);
2466 /* Append the previously read headers */
2467 list_append_list_unique(csp->headers, headers);
2468 destroy_list(headers);
2475 /*********************************************************************
2477 * Function : parse_client_request
2479 * Description : Parses the client's request and decides what to do
2482 * Note that since we're not using select() we could get
2483 * blocked here if a client connected, then didn't say
2487 * 1 : csp = Current client state (buffers, headers, etc...)
2489 * Returns : JB_ERR_OK or JB_ERR_PARSE
2491 *********************************************************************/
2492 static jb_err parse_client_request(struct client_state *csp)
2494 struct http_request *http = csp->http;
2497 err = sed(csp, FILTER_CLIENT_HEADERS);
2498 if (JB_ERR_OK != err)
2500 /* XXX: Should be handled in sed(). */
2501 assert(err == JB_ERR_PARSE);
2502 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers.");
2504 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2506 /* Check request line for rewrites. */
2507 if ((NULL == csp->headers->first->str)
2508 || (strcmp(http->cmd, csp->headers->first->str) &&
2509 (JB_ERR_OK != change_request_destination(csp))))
2512 * A header filter broke the request line - bail out.
2514 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
2515 /* XXX: Use correct size */
2516 log_error(LOG_LEVEL_CLF,
2517 "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
2518 log_error(LOG_LEVEL_ERROR,
2519 "Invalid request line after applying header filters.");
2520 free_http_request(http);
2522 return JB_ERR_PARSE;
2530 /*********************************************************************
2534 * Description : Once a connection to the client has been accepted,
2535 * this function is called (via serve()) to handle the
2536 * main business of the communication. When this
2537 * function returns, the caller must close the client
2540 * FIXME: chat is nearly thousand lines long.
2544 * 1 : csp = Current client state (buffers, headers, etc...)
2546 * Returns : Nothing.
2548 *********************************************************************/
2549 static void chat(struct client_state *csp)
2551 char buf[BUFFER_SIZE];
2558 int ms_iis5_hack = 0;
2559 size_t byte_count = 0;
2560 int forwarded_connect_retries = 0;
2561 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
2562 const struct forward_spec *fwd;
2563 struct http_request *http;
2564 int len = 0; /* for buffer sizes (and negative error codes) */
2566 /* Function that does the content filtering for the current request */
2567 filter_function_ptr content_filter = NULL;
2569 /* Skeleton for HTTP response, if we should intercept the request */
2570 struct http_response *rsp;
2571 struct timeval timeout;
2573 memset(buf, 0, sizeof(buf));
2574 memset(&timeout, 0, sizeof(timeout));
2575 timeout.tv_sec = csp->config->socket_timeout;
2579 if (receive_client_request(csp) != JB_ERR_OK)
2583 if (parse_client_request(csp) != JB_ERR_OK)
2588 /* decide how to route the HTTP request */
2589 fwd = forward_url(csp, http);
2592 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
2593 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2597 * build the http request to send to the server
2598 * we have to do one of the following:
2600 * create = use the original HTTP request to create a new
2601 * HTTP request that has either the path component
2602 * without the http://domainspec (w/path) or the
2603 * full orininal URL (w/url)
2604 * Note that the path and/or the HTTP version may
2605 * have been altered by now.
2607 * connect = Open a socket to the host:port of the server
2608 * and short-circuit server and client socket.
2610 * pass = Pass the request unchanged if forwarding a CONNECT
2611 * request to a parent proxy. Note that we'll be sending
2612 * the CFAIL message ourselves if connecting to the parent
2613 * fails, but we won't send a CSUCCEED message if it works,
2614 * since that would result in a double message (ours and the
2615 * parent's). After sending the request to the parent, we simply
2618 * here's the matrix:
2621 * +--------+--------+
2623 * 0 | create | connect|
2625 * Forwarding +--------+--------+
2627 * 1 | create | pass |
2629 * +--------+--------+
2633 if (http->ssl && connect_port_is_forbidden(csp))
2635 const char *acceptable_connect_ports =
2636 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
2637 assert(NULL != acceptable_connect_ports);
2638 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
2639 "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
2640 csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
2641 csp->action->flags |= ACTION_BLOCK;
2647 freez(csp->headers->first->str);
2648 build_request_line(csp, fwd, &csp->headers->first->str);
2652 * We have a request. Check if one of the crunchers wants it.
2654 if (crunch_response_triggered(csp, crunchers_all))
2657 * Yes. The client got the crunch response
2658 * and we are done here after cleaning up.
2660 /* XXX: why list_remove_all()? */
2661 list_remove_all(csp->headers);
2666 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2668 if (fwd->forward_host)
2670 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2671 fwd->forward_host, fwd->forward_port, http->hostport);
2675 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2678 /* here we connect to the server, gateway, or the forwarder */
2680 while ((csp->sfd = forwarded_connect(fwd, http, csp))
2681 && (errno == EINVAL)
2682 && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2684 log_error(LOG_LEVEL_ERROR,
2685 "failed request #%u to connect to %s. Trying again.",
2686 forwarded_connect_retries, http->hostport);
2689 if (csp->sfd == JB_INVALID_SOCKET)
2691 if (fwd->type != SOCKS_NONE)
2694 rsp = error_response(csp, "forwarding-failed", errno);
2696 else if (errno == EINVAL)
2698 rsp = error_response(csp, "no-such-domain", errno);
2702 rsp = error_response(csp, "connect-failed", errno);
2703 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2707 /* Write the answer to the client */
2710 send_crunch_response(csp, rsp);
2716 hdr = list_to_text(csp->headers);
2719 /* FIXME Should handle error properly */
2720 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2722 list_remove_all(csp->headers);
2724 if (fwd->forward_host || (http->ssl == 0))
2727 * Write the client's (modified) header to the server
2728 * (along with anything else that may be in the buffer)
2730 if (write_socket(csp->sfd, hdr, strlen(hdr))
2731 || (flush_socket(csp->sfd, csp->iob) < 0))
2733 log_error(LOG_LEVEL_CONNECT,
2734 "write header to: %s failed: %E", http->hostport);
2736 rsp = error_response(csp, "connect-failed", errno);
2739 send_crunch_response(csp, rsp);
2749 * We're running an SSL tunnel and we're not forwarding,
2750 * so just send the "connect succeeded" message to the
2751 * client, flush the rest, and get out of the way.
2753 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
2761 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2763 /* we're finished with the client's header */
2766 maxfd = (csp->cfd > csp->sfd) ? csp->cfd : csp->sfd;
2768 /* pass data between the client and server
2769 * until one or the other shuts down the connection.
2778 * FD_ZERO here seems to point to an errant macro which crashes.
2779 * So do this by hand for now...
2781 memset(&rfds,0x00,sizeof(fd_set));
2785 FD_SET(csp->cfd, &rfds);
2786 FD_SET(csp->sfd, &rfds);
2788 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2789 if ((csp->flags & CSP_FLAG_CHUNKED)
2790 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
2791 && ((csp->iob->eod - csp->iob->cur) >= 5)
2792 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
2794 log_error(LOG_LEVEL_CONNECT,
2795 "Looks like we read the last chunk together with "
2796 "the server headers. We better stop reading.");
2797 byte_count = (size_t)(csp->iob->eod - csp->iob->cur);
2798 csp->expected_content_length = byte_count;
2799 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2801 if (server_body && server_response_is_complete(csp, byte_count))
2803 log_error(LOG_LEVEL_CONNECT,
2804 "Done reading from server. Expected content length: %d. "
2805 "Actual content length: %d. Most recently received: %d.",
2806 csp->expected_content_length, byte_count, len);
2809 * XXX: should not jump around,
2810 * chat() is complicated enough already.
2814 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2816 n = select((int)maxfd+1, &rfds, NULL, NULL, &timeout);
2820 log_error(LOG_LEVEL_ERROR,
2821 "Didn't receive data in time: %s", http->url);
2822 if ((byte_count == 0) && (http->ssl == 0))
2824 write_socket(csp->cfd, CONNECTION_TIMEOUT_RESPONSE,
2825 strlen(CONNECTION_TIMEOUT_RESPONSE));
2827 mark_server_socket_tainted(csp);
2832 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2833 mark_server_socket_tainted(csp);
2838 * This is the body of the browser's request,
2839 * just read and write it.
2841 if (FD_ISSET(csp->cfd, &rfds))
2843 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2847 /* XXX: not sure if this is necessary. */
2848 mark_server_socket_tainted(csp);
2849 break; /* "game over, man" */
2852 if (write_socket(csp->sfd, buf, (size_t)len))
2854 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2855 mark_server_socket_tainted(csp);
2862 * The server wants to talk. It could be the header or the body.
2863 * If `hdr' is null, then it's the header otherwise it's the body.
2864 * FIXME: Does `hdr' really mean `host'? No.
2866 if (FD_ISSET(csp->sfd, &rfds))
2869 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2873 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2875 if (http->ssl && (fwd->forward_host == NULL))
2878 * Just hang up. We already confirmed the client's CONNECT
2879 * request with status code 200 and unencrypted content is
2880 * no longer welcome.
2882 log_error(LOG_LEVEL_ERROR,
2883 "CONNECT already confirmed. Unable to tell the client about the problem.");
2886 else if (byte_count)
2889 * Just hang up. We already transmitted the original headers
2890 * and parts of the original content and therefore missed the
2891 * chance to send an error message (without risking data corruption).
2893 * XXX: we could retry with a fancy range request here.
2895 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2896 "Unable to tell the client about the problem.");
2897 mark_server_socket_tainted(csp);
2901 rsp = error_response(csp, "connect-failed", errno);
2904 send_crunch_response(csp, rsp);
2910 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2911 if (csp->flags & CSP_FLAG_CHUNKED)
2913 if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2915 /* XXX: this is a temporary hack */
2916 log_error(LOG_LEVEL_CONNECT,
2917 "Looks like we reached the end of the last chunk. "
2918 "We better stop reading.");
2919 csp->expected_content_length = byte_count + (size_t)len;
2920 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2924 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2927 * Add a trailing zero to let be able to use string operations.
2928 * XXX: do we still need this with filter_popups gone?
2933 * Normally, this would indicate that we've read
2934 * as much as the server has sent us and we can
2935 * close the client connection. However, Microsoft
2936 * in its wisdom has released IIS/5 with a bug that
2937 * prevents it from sending the trailing \r\n in
2938 * a 302 redirect header (and possibly other headers).
2939 * To work around this if we've haven't parsed
2940 * a full header we'll append a trailing \r\n
2941 * and see if this now generates a valid one.
2943 * This hack shouldn't have any impacts. If we've
2944 * already transmitted the header or if this is a
2945 * SSL connection, then we won't bother with this
2946 * hack. So we only work on partially received
2947 * headers. If we append a \r\n and this still
2948 * doesn't generate a valid header, then we won't
2949 * transmit anything to the client.
2954 if (server_body || http->ssl)
2957 * If we have been buffering up the document,
2958 * now is the time to apply content modification
2959 * and send the result to the client.
2963 p = execute_content_filter(csp, content_filter);
2965 * If the content filter fails, use the original
2966 * buffer and length.
2967 * (see p != NULL ? p : csp->iob->cur below)
2971 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2974 if (JB_ERR_OK != update_server_headers(csp))
2976 log_error(LOG_LEVEL_FATAL,
2977 "Failed to update server headers. after filtering.");
2980 hdr = list_to_text(csp->headers);
2983 /* FIXME Should handle error properly */
2984 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2987 if (write_socket(csp->cfd, hdr, strlen(hdr))
2988 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
2990 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2993 mark_server_socket_tainted(csp);
3001 break; /* "game over, man" */
3005 * This is NOT the body, so
3006 * Let's pretend the server just sent us a blank line.
3008 snprintf(buf, sizeof(buf), "\r\n");
3009 len = (int)strlen(buf);
3012 * Now, let the normal header parsing algorithm below do its
3013 * job. If it fails, we'll exit instead of continuing.
3020 * If this is an SSL connection or we're in the body
3021 * of the server document, just write it to the client,
3022 * unless we need to buffer the body for later content-filtering
3024 if (server_body || http->ssl)
3029 * If there is no memory left for buffering the content, or the buffer limit
3030 * has been reached, switch to non-filtering mode, i.e. make & write the
3031 * header, flush the iob and buf, and get out of the way.
3033 if (add_to_iob(csp, buf, len))
3038 log_error(LOG_LEVEL_INFO,
3039 "Flushing header and buffers. Stepping back from filtering.");
3041 hdr = list_to_text(csp->headers);
3045 * Memory is too tight to even generate the header.
3046 * Send our static "Out-of-memory" page.
3048 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
3049 rsp = cgi_error_memory();
3050 send_crunch_response(csp, rsp);
3051 mark_server_socket_tainted(csp);
3054 hdrlen = strlen(hdr);
3056 if (write_socket(csp->cfd, hdr, hdrlen)
3057 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
3058 || (write_socket(csp->cfd, buf, (size_t)len)))
3060 log_error(LOG_LEVEL_CONNECT,
3061 "Flush header and buffers to client failed: %E");
3063 mark_server_socket_tainted(csp);
3068 * Reset the byte_count to the amount of bytes
3069 * we just flushed. len will be added a few lines below,
3070 * hdrlen doesn't matter for LOG_LEVEL_CLF.
3072 byte_count = (size_t)flushed;
3074 content_filter = NULL;
3080 if (write_socket(csp->cfd, buf, (size_t)len))
3082 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
3083 mark_server_socket_tainted(csp);
3087 byte_count += (size_t)len;
3092 const char *header_start;
3094 * We're still looking for the end of the server's header.
3095 * Buffer up the data we just read. If that fails, there's
3096 * little we can do but send our static out-of-memory page.
3098 if (add_to_iob(csp, buf, len))
3100 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
3101 rsp = cgi_error_memory();
3102 send_crunch_response(csp, rsp);
3103 mark_server_socket_tainted(csp);
3107 header_start = csp->iob->cur;
3109 /* Convert iob into something sed() can digest */
3110 if (JB_ERR_PARSE == get_server_headers(csp))
3115 * Well, we tried our MS IIS/5 hack and it didn't work.
3116 * The header is incomplete and there isn't anything
3117 * we can do about it.
3119 log_error(LOG_LEVEL_INFO,
3120 "MS IIS5 hack didn't produce valid headers.");
3126 * Since we have to wait for more from the server before
3127 * we can parse the headers we just continue here.
3129 int header_offset = csp->iob->cur - header_start;
3130 assert(csp->iob->cur >= header_start);
3131 byte_count += (size_t)(len - header_offset);
3132 log_error(LOG_LEVEL_CONNECT, "Continuing buffering headers. "
3133 "byte_count: %d. header_offset: %d. len: %d.",
3134 byte_count, header_offset, len);
3139 /* Did we actually get anything? */
3140 if (NULL == csp->headers->first)
3142 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
3143 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3144 write_socket(csp->cfd, NO_SERVER_DATA_RESPONSE, strlen(NO_SERVER_DATA_RESPONSE));
3145 free_http_request(http);
3146 mark_server_socket_tainted(csp);
3150 assert(csp->headers->first->str);
3152 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
3153 strncmpic(csp->headers->first->str, "ICY", 3))
3156 * It doesn't look like a HTTP (or Shoutcast) response:
3157 * tell the client and log the problem.
3159 if (strlen(csp->headers->first->str) > 30)
3161 csp->headers->first->str[30] = '\0';
3163 log_error(LOG_LEVEL_ERROR,
3164 "Invalid server or forwarder response. Starts with: %s",
3165 csp->headers->first->str);
3166 log_error(LOG_LEVEL_CLF,
3167 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3168 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
3169 strlen(INVALID_SERVER_HEADERS_RESPONSE));
3170 free_http_request(http);
3171 mark_server_socket_tainted(csp);
3176 * We have now received the entire server header,
3177 * filter it and send the result to the client
3179 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
3181 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
3183 hdr = list_to_text(csp->headers);
3186 /* FIXME Should handle error properly */
3187 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3190 if (crunch_response_triggered(csp, crunchers_light))
3193 * One of the tags created by a server-header
3194 * tagger triggered a crunch. We already
3195 * delivered the crunch response to the client
3196 * and are done here after cleaning up.
3199 mark_server_socket_tainted(csp);
3202 /* Buffer and pcrs filter this if appropriate. */
3204 if (!http->ssl) /* We talk plaintext */
3206 content_filter = get_filter_function(csp);
3209 * Only write if we're not buffering for content modification
3211 if (!content_filter)
3214 * Write the server's (modified) header to
3215 * the client (along with anything else that
3216 * may be in the buffer)
3219 if (write_socket(csp->cfd, hdr, strlen(hdr))
3220 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
3222 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
3225 * The write failed, so don't bother mentioning it
3226 * to the client... it probably can't hear us anyway.
3229 mark_server_socket_tainted(csp);
3233 byte_count += (size_t)len;
3238 * XXX: the header lenght should probably
3239 * be calculated by get_server_headers().
3241 int header_length = csp->iob->cur - header_start;
3242 assert(csp->iob->cur > header_start);
3243 byte_count += (size_t)(len - header_length);
3246 /* we're finished with the server's header */
3252 * If this was a MS IIS/5 hack then it means the server
3253 * has already closed the connection. Nothing more to read.
3258 log_error(LOG_LEVEL_INFO,
3259 "Closed server connection detected with MS IIS5 hack enabled.");
3265 mark_server_socket_tainted(csp);
3266 return; /* huh? we should never get here */
3269 if (csp->content_length == 0)
3272 * If Privoxy didn't recalculate the Content-Lenght,
3273 * byte_count is still correct.
3275 csp->content_length = byte_count;
3278 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3279 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3280 && (csp->expected_content_length != byte_count))
3282 log_error(LOG_LEVEL_CONNECT,
3283 "Received %d bytes while expecting %d.",
3284 byte_count, csp->expected_content_length);
3285 mark_server_socket_tainted(csp);
3289 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
3290 csp->ip_addr_str, http->ocmd, csp->content_length);
3294 /*********************************************************************
3298 * Description : This is little more than chat. We only "serve" to
3299 * to close any socket that chat may have opened.
3302 * 1 : csp = Current client state (buffers, headers, etc...)
3306 *********************************************************************/
3308 void serve(struct client_state *csp)
3309 #else /* ifndef AMIGA */
3310 static void serve(struct client_state *csp)
3311 #endif /* def AMIGA */
3314 close_socket(csp->cfd);
3316 if (csp->sfd != JB_INVALID_SOCKET)
3318 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3319 static int monitor_thread_running = 0;
3321 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
3322 && (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
3324 remember_connection(csp->sfd, csp->http, forward_url(csp, csp->http));
3325 privoxy_mutex_lock(&connection_reuse_mutex);
3326 if (!monitor_thread_running)
3328 monitor_thread_running = 1;
3329 privoxy_mutex_unlock(&connection_reuse_mutex);
3330 wait_for_alive_connections();
3331 privoxy_mutex_lock(&connection_reuse_mutex);
3332 monitor_thread_running = 0;
3334 privoxy_mutex_unlock(&connection_reuse_mutex);
3338 forget_connection(csp->sfd);
3339 close_socket(csp->sfd);
3342 close_socket(csp->sfd);
3343 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3346 csp->flags &= ~CSP_FLAG_ACTIVE;
3352 /*********************************************************************
3354 * Function : server_thread
3356 * Description : We only exist to call `serve' in a threaded environment.
3359 * 1 : data = Current client state (buffers, headers, etc...)
3361 * Returns : Always 0.
3363 *********************************************************************/
3364 static int32 server_thread(void *data)
3366 serve((struct client_state *) data);
3373 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3374 /*********************************************************************
3378 * Description : Print usage info & exit.
3380 * Parameters : Pointer to argv[0] for identifying ourselves
3384 *********************************************************************/
3385 static void usage(const char *myname)
3387 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
3391 #endif /* defined(unix) */
3394 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
3395 #endif /* defined(unix) */
3396 "[--version] [configfile]\n"
3397 "Aborting\n", myname);
3402 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
3405 #ifdef MUTEX_LOCKS_AVAILABLE
3406 /*********************************************************************
3408 * Function : privoxy_mutex_lock
3410 * Description : Locks a mutex.
3413 * 1 : mutex = The mutex to lock.
3415 * Returns : Void. May exit in case of errors.
3417 *********************************************************************/
3418 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
3420 #ifdef FEATURE_PTHREAD
3421 int err = pthread_mutex_lock(mutex);
3424 if (mutex != &log_mutex)
3426 log_error(LOG_LEVEL_FATAL,
3427 "Mutex locking failed: %s.\n", strerror(err));
3432 EnterCriticalSection(mutex);
3433 #endif /* def FEATURE_PTHREAD */
3437 /*********************************************************************
3439 * Function : privoxy_mutex_unlock
3441 * Description : Unlocks a mutex.
3444 * 1 : mutex = The mutex to unlock.
3446 * Returns : Void. May exit in case of errors.
3448 *********************************************************************/
3449 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
3451 #ifdef FEATURE_PTHREAD
3452 int err = pthread_mutex_unlock(mutex);
3455 if (mutex != &log_mutex)
3457 log_error(LOG_LEVEL_FATAL,
3458 "Mutex unlocking failed: %s.\n", strerror(err));
3463 LeaveCriticalSection(mutex);
3464 #endif /* def FEATURE_PTHREAD */
3468 /*********************************************************************
3470 * Function : privoxy_mutex_init
3472 * Description : Prepares a mutex.
3475 * 1 : mutex = The mutex to initialize.
3477 * Returns : Void. May exit in case of errors.
3479 *********************************************************************/
3480 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
3482 #ifdef FEATURE_PTHREAD
3483 int err = pthread_mutex_init(mutex, 0);
3486 printf("Fatal error. Mutex initialization failed: %s.\n",
3491 InitializeCriticalSection(mutex);
3492 #endif /* def FEATURE_PTHREAD */
3494 #endif /* def MUTEX_LOCKS_AVAILABLE */
3496 /*********************************************************************
3498 * Function : initialize_mutexes
3500 * Description : Prepares mutexes if mutex support is available.
3504 * Returns : Void, exits in case of errors.
3506 *********************************************************************/
3507 static void initialize_mutexes(void)
3509 #ifdef MUTEX_LOCKS_AVAILABLE
3511 * Prepare global mutex semaphores
3513 privoxy_mutex_init(&log_mutex);
3514 privoxy_mutex_init(&log_init_mutex);
3515 privoxy_mutex_init(&connection_reuse_mutex);
3518 * XXX: The assumptions below are a bit naive
3519 * and can cause locks that aren't necessary.
3521 * For example older FreeBSD versions (< 6.x?)
3522 * have no gethostbyname_r, but gethostbyname is
3525 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
3526 privoxy_mutex_init(&resolver_mutex);
3527 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
3529 * XXX: should we use a single mutex for
3530 * localtime() and gmtime() as well?
3532 #ifndef HAVE_GMTIME_R
3533 privoxy_mutex_init(&gmtime_mutex);
3534 #endif /* ndef HAVE_GMTIME_R */
3536 #ifndef HAVE_LOCALTIME_R
3537 privoxy_mutex_init(&localtime_mutex);
3538 #endif /* ndef HAVE_GMTIME_R */
3541 privoxy_mutex_init(&rand_mutex);
3542 #endif /* ndef HAVE_RANDOM */
3543 #endif /* def MUTEX_LOCKS_AVAILABLE */
3547 /*********************************************************************
3551 * Description : Load the config file and start the listen loop.
3552 * This function is a lot more *sane* with the `load_config'
3553 * and `listen_loop' functions; although it stills does
3554 * a *little* too much for my taste.
3557 * 1 : argc = Number of parameters (including $0).
3558 * 2 : argv = Array of (char *)'s to the parameters.
3560 * Returns : 1 if : can't open config file, unrecognized directive,
3561 * stats requested in multi-thread mode, can't open the
3562 * log file, can't open the jar file, listen port is invalid,
3563 * any load fails, and can't bind port.
3565 * Else main never returns, the process must be signaled
3566 * to terminate execution. Or, on Windows, use the
3567 * "File", "Exit" menu option.
3569 *********************************************************************/
3571 int real_main(int argc, const char *argv[])
3573 int main(int argc, const char *argv[])
3577 unsigned int random_seed;
3579 struct passwd *pw = NULL;
3580 struct group *grp = NULL;
3583 char *pre_chroot_nslookup_to_load_resolver = NULL;
3590 #if !defined(_WIN32)
3597 /* Prepare mutexes if supported and necessary. */
3598 initialize_mutexes();
3600 /* Enable logging until further notice. */
3604 * Parse the command line arguments
3606 * XXX: simply printing usage information in case of
3607 * invalid arguments isn't particularly user friendly.
3609 while (++argc_pos < argc)
3612 /* Check to see if the service must be installed or uninstalled */
3613 if (strncmp(argv[argc_pos], "--install", 9) == 0)
3615 const char *pName = argv[argc_pos] + 9;
3618 exit( (install_service(pName)) ? 0 : 1 );
3620 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
3622 const char *pName = argv[argc_pos] + 11;
3625 exit((uninstall_service(pName)) ? 0 : 1);
3627 else if (strcmp(argv[argc_pos], "--service" ) == 0)
3629 bRunAsService = TRUE;
3630 w32_set_service_cwd();
3631 atexit(w32_service_exit_notify);
3634 #endif /* defined(_WIN32) */
3637 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3639 if (strcmp(argv[argc_pos], "--help") == 0)
3644 else if(strcmp(argv[argc_pos], "--version") == 0)
3646 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
3652 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
3657 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
3659 if (++argc_pos == argc) usage(argv[0]);
3660 pidfile = strdup(argv[argc_pos]);
3663 else if (strcmp(argv[argc_pos], "--user" ) == 0)
3665 if (++argc_pos == argc) usage(argv[argc_pos]);
3667 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
3670 if (NULL == (grp = getgrnam(p)))
3672 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
3676 if (NULL == (pw = getpwnam(argv[argc_pos])))
3678 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
3681 if (p != NULL) *--p = '\0';
3684 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
3686 if (++argc_pos == argc) usage(argv[0]);
3687 pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
3690 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
3694 #endif /* defined(unix) */
3696 else if (argc_pos + 1 != argc)
3699 * This is neither the last command line
3700 * option, nor was it recognized before,
3701 * therefore it must be invalid.
3707 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3709 configfile = argv[argc_pos];
3712 } /* -END- while (more arguments) */
3714 show_version(Argv[0]);
3717 if ( *configfile != '/' )
3719 char cwd[BUFFER_SIZE];
3721 size_t abs_file_size;
3723 /* make config-filename absolute here */
3724 if (NULL == getcwd(cwd, sizeof(cwd)))
3726 perror("failed to get current working directory");
3731 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3732 basedir = strdup(cwd);
3734 if (NULL == basedir ||
3735 NULL == (abs_file = malloc(abs_file_size)))
3737 perror("malloc failed");
3740 strlcpy(abs_file, basedir, abs_file_size);
3741 strlcat(abs_file, "/", abs_file_size );
3742 strlcat(abs_file, configfile, abs_file_size);
3743 configfile = abs_file;
3745 #endif /* defined unix */
3749 clients->next = NULL;
3751 /* XXX: factor out initialising after the next stable release. */
3754 #elif defined(_WIN32)
3758 random_seed = (unsigned int)time(NULL);
3760 srandom(random_seed);
3763 #endif /* ifdef HAVE_RANDOM */
3766 * Unix signal handling
3768 * Catch the abort, interrupt and terminate signals for a graceful exit
3769 * Catch the hangup signal so the errlog can be reopened.
3770 * Ignore the broken pipe signals (FIXME: Why?)
3772 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3775 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3776 const int ignored_signals[] = { SIGPIPE, 0 };
3778 for (idx = 0; catched_signals[idx] != 0; idx++)
3780 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3781 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3783 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3784 #endif /* ifdef sun */
3786 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3790 for (idx = 0; ignored_signals[idx] != 0; idx++)
3792 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3794 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3799 #else /* ifdef _WIN32 */
3800 # ifdef _WIN_CONSOLE
3802 * We *are* in a windows console app.
3803 * Print a verbose messages about FAQ's and such
3805 printf("%s", win32_blurb);
3806 # endif /* def _WIN_CONSOLE */
3807 #endif /* def _WIN32 */
3810 /* Initialize the CGI subsystem */
3811 cgi_init_error_messages();
3814 * If runnig on unix and without the --nodaemon
3815 * option, become a daemon. I.e. fork, detach
3816 * from tty and get process group leadership
3829 if ( pid < 0 ) /* error */
3834 else if ( pid != 0 ) /* parent */
3839 * must check for errors
3840 * child died due to missing files aso
3843 wpid = waitpid( pid, &status, WNOHANG );
3852 /* Should be more portable, but not as well tested */
3857 #else /* ndef __FreeBSD__ */
3859 #endif /* ndef __FreeBSD__ */
3860 fd = open("/dev/tty", O_RDONLY);
3863 /* no error check here */
3864 ioctl( fd, TIOCNOTTY,0 );
3869 * stderr (fd 2) will be closed later on, when the
3870 * log file has been parsed.
3877 } /* -END- if (!no_daemon) */
3880 * As soon as we have written the PID file, we can switch
3881 * to the user and group ID indicated by the --user option
3887 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3889 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3893 if (setgroups(1, &grp->gr_gid))
3895 log_error(LOG_LEVEL_FATAL, "setgroups() failed: %E");
3898 else if (initgroups(pw->pw_name, pw->pw_gid))
3900 log_error(LOG_LEVEL_FATAL, "initgroups() failed: %E");
3906 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3908 /* Read the time zone file from /etc before doing chroot. */
3910 if (NULL != pre_chroot_nslookup_to_load_resolver
3911 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3913 /* Initialize resolver library. */
3914 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3916 if (chroot(pw->pw_dir) < 0)
3918 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3922 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3925 if (setuid(pw->pw_uid))
3927 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3931 char putenv_dummy[64];
3933 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3934 if (putenv(putenv_dummy) != 0)
3936 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3939 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3940 if (putenv(putenv_dummy) != 0)
3942 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3948 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3951 #endif /* defined unix */
3954 /* This will be FALSE unless the command line specified --service
3958 /* Yup, so now we must attempt to establish a connection
3959 * with the service dispatcher. This will only work if this
3960 * process was launched by the service control manager to
3961 * actually run as a service. If this isn't the case, i've
3962 * known it take around 30 seconds or so for the call to return.
3965 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3966 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3968 /* Service has run, and at this point is now being stopped, so just return */
3973 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3975 /* An error occurred. Usually it's because --service was wrongly specified
3976 * and we were unable to connect to the Service Control Dispatcher because
3977 * it wasn't expecting us and is therefore not listening.
3979 * For now, just continue below to call the listen_loop function.
3982 #endif /* def _WIN32 */
3992 /*********************************************************************
3994 * Function : bind_port_helper
3996 * Description : Bind the listen port. Handles logging, and aborts
4000 * 1 : config = Privoxy configuration. Specifies port
4003 * Returns : Port that was opened.
4005 *********************************************************************/
4006 static jb_socket bind_port_helper(struct configuration_spec * config)
4011 if (config->haddr == NULL)
4013 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
4018 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
4019 config->hport, config->haddr);
4022 result = bind_port(config->haddr, config->hport, &bfd);
4029 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
4030 "There may be another Privoxy or some other "
4031 "proxy running on port %d",
4032 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
4033 config->hport, config->hport);
4036 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
4037 "The hostname is not resolvable",
4038 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
4041 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
4042 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
4045 /* shouldn't get here */
4046 return JB_INVALID_SOCKET;
4049 config->need_bind = 0;
4056 /* Without this simple workaround we get this compiler warning from _beginthread
4057 * warning C4028: formal parameter 1 different from declaration
4059 void w32_service_listen_loop(void *p)
4063 #endif /* def _WIN32 */
4066 /*********************************************************************
4068 * Function : listen_loop
4070 * Description : bind the listen port and enter a "FOREVER" listening loop.
4076 *********************************************************************/
4077 static void listen_loop(void)
4079 struct client_state *csp = NULL;
4081 struct configuration_spec * config;
4083 config = load_config();
4085 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4087 * XXX: Should be relocated once it no
4088 * longer needs to emit log messages.
4090 initialize_reusable_connections();
4091 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4093 bfd = bind_port_helper(config);
4095 #ifdef FEATURE_GRACEFUL_TERMINATION
4096 while (!g_terminate)
4101 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
4102 while (waitpid(-1, NULL, WNOHANG) > 0)
4104 /* zombie children */
4106 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
4109 * Free data that was used by died threads
4115 * Re-open the errlog after HUP signal
4117 if (received_hup_signal)
4119 if (NULL != config->logfile)
4121 init_error_log(Argv[0], config->logfile);
4123 received_hup_signal = 0;
4127 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
4129 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
4133 csp->flags |= CSP_FLAG_ACTIVE;
4134 csp->sfd = JB_INVALID_SOCKET;
4136 csp->config = config = load_config();
4138 if ( config->need_bind )
4141 * Since we were listening to the "old port", we will not see
4142 * a "listen" param change until the next IJB request. So, at
4143 * least 1 more request must be made for us to find the new
4144 * setting. I am simply closing the old socket and binding the
4147 * Which-ever is correct, we will serve 1 more page via the
4148 * old settings. This should probably be a "show-proxy-args"
4149 * request. This should not be a so common of an operation
4150 * that this will hurt people's feelings.
4155 bfd = bind_port_helper(config);
4158 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
4160 if (!accept_connection(csp, bfd))
4162 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
4175 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
4178 #ifdef FEATURE_TOGGLE
4179 if (global_toggle_state)
4180 #endif /* def FEATURE_TOGGLE */
4182 csp->flags |= CSP_FLAG_TOGGLED_ON;
4185 if (run_loader(csp))
4187 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
4188 /* Never get here - LOG_LEVEL_FATAL causes program exit */
4192 if (block_acl(NULL,csp))
4194 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
4195 close_socket(csp->cfd);
4199 #endif /* def FEATURE_ACL */
4201 /* add it to the list of clients */
4202 csp->next = clients->next;
4203 clients->next = csp;
4205 if (config->multi_threaded)
4209 /* this is a switch () statment in the C preprocessor - ugh */
4210 #undef SELECTED_ONE_OPTION
4212 /* Use Pthreads in preference to native code */
4213 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
4214 #define SELECTED_ONE_OPTION
4216 pthread_t the_thread;
4217 pthread_attr_t attrs;
4219 pthread_attr_init(&attrs);
4220 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
4221 errno = pthread_create(&the_thread, &attrs,
4222 (void * (*)(void *))serve, csp);
4223 child_id = errno ? -1 : 0;
4224 pthread_attr_destroy(&attrs);
4228 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
4229 #define SELECTED_ONE_OPTION
4230 child_id = _beginthread(
4231 (void (*)(void *))serve,
4236 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
4237 #define SELECTED_ONE_OPTION
4238 child_id = _beginthread(
4239 (void(* _Optlink)(void*))serve,
4245 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
4246 #define SELECTED_ONE_OPTION
4248 thread_id tid = spawn_thread
4249 (server_thread, "server", B_NORMAL_PRIORITY, csp);
4251 if ((tid >= 0) && (resume_thread(tid) == B_OK))
4253 child_id = (int) tid;
4262 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
4263 #define SELECTED_ONE_OPTION
4264 csp->cfd = ReleaseSocket(csp->cfd, -1);
4267 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4268 NP_Output, Output(),
4269 NP_CloseOutput, FALSE,
4270 NP_Name, (ULONG)"privoxy child",
4274 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4275 NP_Output, Output(),
4276 NP_CloseOutput, FALSE,
4277 NP_Name, (ULONG)"privoxy child",
4278 NP_StackSize, 200*1024,
4284 ((struct Task *)child_id)->tc_UserData = csp;
4285 Signal((struct Task *)child_id, SIGF_SINGLE);
4290 #if !defined(SELECTED_ONE_OPTION)
4293 /* This block is only needed when using fork().
4294 * When using threads, the server thread was
4295 * created and run by the call to _beginthread().
4297 if (child_id == 0) /* child */
4300 #ifdef FEATURE_TOGGLE
4301 int inherited_toggle_state = global_toggle_state;
4302 #endif /* def FEATURE_TOGGLE */
4307 * If we've been toggled or we've blocked the request, tell Mom
4310 #ifdef FEATURE_TOGGLE
4311 if (inherited_toggle_state != global_toggle_state)
4313 rc |= RC_FLAG_TOGGLED;
4315 #endif /* def FEATURE_TOGGLE */
4317 #ifdef FEATURE_STATISTICS
4318 if (csp->flags & CSP_FLAG_REJECTED)
4320 rc |= RC_FLAG_BLOCKED;
4322 #endif /* ndef FEATURE_STATISTICS */
4326 else if (child_id > 0) /* parent */
4328 /* in a fork()'d environment, the parent's
4329 * copy of the client socket and the CSP
4333 #if !defined(_WIN32) && !defined(__CYGWIN__)
4335 wait( &child_status );
4338 * Evaluate child's return code: If the child has
4339 * - been toggled, toggle ourselves
4340 * - blocked its request, bump up the stats counter
4343 #ifdef FEATURE_TOGGLE
4344 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
4346 global_toggle_state = !global_toggle_state;
4348 #endif /* def FEATURE_TOGGLE */
4350 #ifdef FEATURE_STATISTICS
4352 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
4356 #endif /* def FEATURE_STATISTICS */
4358 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
4359 close_socket(csp->cfd);
4360 csp->flags &= ~CSP_FLAG_ACTIVE;
4364 #undef SELECTED_ONE_OPTION
4365 /* end of cpp switch () */
4367 if (child_id < 0) /* failed */
4369 char buf[BUFFER_SIZE];
4371 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
4373 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
4375 write_socket(csp->cfd, buf, strlen(buf));
4376 close_socket(csp->cfd);
4377 csp->flags &= ~CSP_FLAG_ACTIVE;
4388 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
4390 /* Clean up. Aim: free all memory (no leaks) */
4391 #ifdef FEATURE_GRACEFUL_TERMINATION
4393 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
4395 unload_current_config_file();
4396 unload_current_actions_file();
4397 unload_current_re_filterfile();
4398 #ifdef FEATURE_TRUST
4399 unload_current_trust_file();
4402 if (config->multi_threaded)
4409 } while ((clients->next != NULL) && (--i > 0));
4413 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
4424 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
4425 /* Cleanup - remove taskbar icon etc. */
4430 #endif /* FEATURE_GRACEFUL_TERMINATION */