1 const char jcc_rcs[] = "$Id: jcc.c,v 1.223 2009/02/09 21:21:16 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 1.223 2009/02/09 21:21:16 fabiankeil
37 * Now that init_log_module() is called earlier, call show_version()
38 * later on from main() directly so it doesn't get called for --help
41 * Revision 1.222 2009/02/08 12:56:51 fabiankeil
42 * Call initialize_mutexes() before init_log_module() again.
43 * Broken since r220, might be the cause of Lee's #2579448.
45 * Revision 1.221 2009/02/06 18:02:58 fabiankeil
46 * When dropping privileges, also give up membership in supplementary
47 * groups. Thanks to Matthias Drochner for reporting the problem,
48 * providing the initial patch and testing the final version.
50 * Revision 1.220 2009/02/04 18:29:07 fabiankeil
51 * Initialize the log module before parsing arguments.
52 * Thanks to Matthias Drochner for the report.
54 * Revision 1.219 2009/01/31 16:08:21 fabiankeil
55 * Remove redundant error check in receive_client_request().
57 * Revision 1.218 2009/01/31 12:25:54 fabiankeil
58 * Flatten indentation in receive_client_request().
60 * Revision 1.217 2009/01/07 19:50:09 fabiankeil
61 * - If the socket-timeout has been reached and the client
62 * hasn't received any data yet, send an explanation before
63 * closing the connection.
64 * - In get_request_line(), signal timeouts the right way.
66 * Revision 1.216 2008/12/24 22:13:11 ler762
67 * fix GCC 3.4.4 warning
69 * Revision 1.215 2008/12/24 17:06:19 fabiankeil
70 * Keep a thread around to timeout alive connections
71 * even if no new requests are coming in.
73 * Revision 1.214 2008/12/20 14:53:55 fabiankeil
74 * Add config option socket-timeout to control the time
75 * Privoxy waits for data to arrive on a socket. Useful
76 * in case of stale ssh tunnels or when fuzz-testing.
78 * Revision 1.213 2008/12/15 18:45:51 fabiankeil
79 * When logging crunches, log the whole URL, so one can easily
80 * differentiate between vanilla HTTP and CONNECT requests.
82 * Revision 1.212 2008/12/14 15:46:22 fabiankeil
83 * Give crunched requests their own log level.
85 * Revision 1.211 2008/12/06 10:05:03 fabiankeil
86 * Downgrade "Received x bytes while expecting y." message to
87 * LOG_LEVEL_CONNECT as it doesn't necessarily indicate an error.
89 * Revision 1.210 2008/12/02 22:03:18 fabiankeil
90 * Don't miscalculate byte_count if we don't get all the
91 * server headers with one read_socket() call. With keep-alive
92 * support enabled, this caused delays until the server closed
95 * Revision 1.209 2008/11/27 09:44:04 fabiankeil
96 * Cosmetics for the last commit: Don't watch out for
97 * the last chunk if the content isn't chunk-encoded or
98 * if we already determined the content length previously.
100 * Revision 1.208 2008/11/26 18:24:17 fabiankeil
101 * Recognize that the server response is complete if the
102 * last chunk is read together with the server headers.
105 * Revision 1.207 2008/11/25 17:25:16 fabiankeil
106 * Don't convert the client-header list to text until we need to.
108 * Revision 1.206 2008/11/23 17:00:11 fabiankeil
109 * Some more chat() cosmetics.
111 * Revision 1.205 2008/11/16 12:43:49 fabiankeil
112 * Turn keep-alive support into a runtime feature
113 * that is disabled by setting keep-alive-timeout
114 * to a negative value.
116 * Revision 1.204 2008/11/06 19:42:17 fabiankeil
117 * Fix last-chunk detection hack to also apply
118 * if buf[] contains nothing but the last-chunk.
120 * Revision 1.203 2008/11/06 18:34:35 fabiankeil
121 * Factor receive_client_request() and
122 * parse_client_request() out of chat().
124 * Revision 1.202 2008/11/02 18:40:34 fabiankeil
125 * If we received a different amount of data than we expected,
126 * log a warning and make sure the server socket isn't reused.
128 * Revision 1.201 2008/11/02 16:48:20 fabiankeil
129 * Revert revision 1.195 and try again.
131 * Revision 1.200 2008/10/26 16:53:18 fabiankeil
134 * Revision 1.199 2008/10/26 15:36:10 fabiankeil
135 * Remove two debug messages with LOG_LEVEL_INFO.
137 * Revision 1.198 2008/10/22 15:19:55 fabiankeil
138 * Once More, With Feeling: if there is no logfile
139 * because the user didn't specify one, we shouldn't
140 * call init_error_log() after receiving SIGHUP either.
142 * Revision 1.197 2008/10/20 17:02:40 fabiankeil
143 * If SIGHUP is received while we aren't running in daemon
144 * mode, calling init_error_log() would be a mistake.
146 * Revision 1.196 2008/10/16 09:16:41 fabiankeil
147 * - Fix two gcc44 conversion warnings.
148 * - Don't bother logging the last five bytes
151 * Revision 1.195 2008/10/13 16:04:37 fabiankeil
152 * Make sure we don't try to reuse tainted server sockets.
154 * Revision 1.194 2008/10/12 18:35:18 fabiankeil
155 * The last commit was a bit too ambitious, apparently the content
156 * length adjustment is only necessary if we aren't buffering.
158 * Revision 1.193 2008/10/12 15:57:35 fabiankeil
159 * Fix content length calculation if we read headers
160 * and the start of the body at once. Now that we have
161 * FEATURE_CONNECTION_KEEP_ALIVE, it actually matters.
163 * Revision 1.192 2008/10/11 18:19:14 fabiankeil
164 * Even more chat() cosmetics.
166 * Revision 1.191 2008/10/11 18:00:14 fabiankeil
167 * Reformat some comments in chat().
169 * Revision 1.190 2008/10/11 14:58:00 fabiankeil
170 * In case of chunk-encoded content, stop reading if
171 * the buffer looks like it ends with the last chunk.
173 * Revision 1.189 2008/10/11 09:53:00 fabiankeil
174 * Let server_response_is_complete() deal properly with
175 * content that is neither buffered nor read all at once.
177 * Revision 1.188 2008/10/09 18:21:41 fabiankeil
178 * Flush work-in-progress changes to keep outgoing connections
179 * alive where possible. Incomplete and mostly #ifdef'd out.
181 * Revision 1.187 2008/09/07 12:35:05 fabiankeil
182 * Add mutex lock support for _WIN32.
184 * Revision 1.186 2008/09/04 08:13:58 fabiankeil
185 * Prepare for critical sections on Windows by adding a
186 * layer of indirection before the pthread mutex functions.
188 * Revision 1.185 2008/08/30 12:03:07 fabiankeil
189 * Remove FEATURE_COOKIE_JAR.
191 * Revision 1.184 2008/08/22 15:34:45 fabiankeil
192 * - Silence LLVM/Clang complaint.
193 * - Make received_hup_signal static.
194 * - Hide definitions for basedir, pidfile and received_hup_signal
195 * from __EMX__ as they only seem to be used in case of #ifdef unix.
197 * Revision 1.183 2008/08/21 07:09:35 fabiankeil
198 * Accept Shoutcast responses again. Problem reported
199 * and fix suggested by Stefan in #2062860.
201 * Revision 1.182 2008/06/27 11:13:56 fabiankeil
202 * Fix possible NULL-pointer dereference reported
203 * by din_a4 in #2003937. Pointy hat to me.
205 * Revision 1.181 2008/05/21 15:47:15 fabiankeil
206 * Streamline sed()'s prototype and declare
207 * the header parse and add structures static.
209 * Revision 1.180 2008/05/21 15:26:32 fabiankeil
210 * - Mark csp as immutable for send_crunch_response().
211 * - Fix comment spelling.
213 * Revision 1.179 2008/05/20 20:13:32 fabiankeil
214 * Factor update_server_headers() out of sed(), ditch the
215 * first_run hack and make server_patterns_light static.
217 * Revision 1.178 2008/05/10 13:23:38 fabiankeil
218 * Don't provide get_header() with the whole client state
219 * structure when it only needs access to csp->iob.
221 * Revision 1.177 2008/05/10 11:51:12 fabiankeil
222 * Make the "read the rest of the headers" loop a bit more readable.
224 * Revision 1.176 2008/05/10 11:37:57 fabiankeil
225 * - Instead of logging when the IIS5 hack is enabled, log when it fails.
226 * - Remove useless comment.
228 * Revision 1.175 2008/05/09 18:53:59 fabiankeil
229 * Fix comment grammar.
231 * Revision 1.174 2008/05/07 18:05:53 fabiankeil
232 * Remove the pointless buffer in client_protocol_is_unsupported().
234 * Revision 1.173 2008/05/06 15:09:00 fabiankeil
235 * Least-effort fix for bug #1821930 (reported by Lee):
236 * If the response doesn't look like HTTP,
237 * tell the client and log the problem.
239 * Revision 1.172 2008/04/16 16:38:21 fabiankeil
240 * Don't pass the whole csp structure to flush_socket()
241 * when it only needs a file descriptor and a buffer.
243 * Revision 1.171 2008/03/27 18:27:25 fabiankeil
244 * Remove kill-popups action.
246 * Revision 1.170 2008/03/06 16:33:46 fabiankeil
247 * If limit-connect isn't used, don't limit CONNECT requests to port 443.
249 * Revision 1.169 2008/03/04 18:30:39 fabiankeil
250 * Remove the treat-forbidden-connects-like-blocks action. We now
251 * use the "blocked" page for forbidden CONNECT requests by default.
253 * Revision 1.168 2008/03/02 12:25:25 fabiankeil
254 * Also use shiny new connect_port_is_forbidden() in jcc.c.
256 * Revision 1.167 2008/02/23 16:57:12 fabiankeil
257 * Rename url_actions() to get_url_actions() and let it
258 * use the standard parameter ordering.
260 * Revision 1.166 2008/02/23 16:33:43 fabiankeil
261 * Let forward_url() use the standard parameter ordering
262 * and mark its second parameter immutable.
264 * Revision 1.165 2008/02/02 19:36:56 fabiankeil
265 * Remove the "Listening ... for local connections only" log message.
266 * Whether or not remote connections are able to reach Privoxy is up
267 * to the operating system.
269 * Revision 1.164 2007/12/16 18:32:46 fabiankeil
270 * Prevent the log messages for CONNECT requests to unacceptable
271 * ports from printing the limit-connect argument as [null] if
272 * limit-connect hasn't been explicitly enabled.
274 * Revision 1.163 2007/12/13 01:47:11 david__schmidt
275 * Make sure all console-mode apps get a usage() instance
277 * Revision 1.162 2007/12/06 17:54:57 fabiankeil
278 * Reword NO_SERVER_DATA_RESPONSE to make it harder
279 * to misunderstand what the message is all about.
281 * Revision 1.161 2007/12/04 19:44:22 fabiankeil
282 * Unbreak trustfile which previously didn't work without
283 * FEATURE_TOGGLE. Fixes BR#1843585, reported by Lee.
285 * Revision 1.160 2007/11/29 18:00:29 fabiankeil
286 * Plug memory leak. Spotted by Valgrind, triggered by
287 * Privoxy-Regression-Test feeding proxyfuzz.py.
289 * Revision 1.159 2007/11/24 14:34:09 fabiankeil
290 * In the HTTP snipplets, refer to the client as client.
292 * Revision 1.158 2007/11/11 16:44:17 fabiankeil
293 * Emit a log message when activating the MS IIS5 hack.
295 * Revision 1.157 2007/11/03 17:34:49 fabiankeil
296 * Log the "weak randomization factor" warning only
297 * once for mingw32 and provide some more details.
299 * Revision 1.156 2007/11/01 18:20:58 fabiankeil
300 * Initialize log module after initializing mutexes, future
301 * deadlocks in that code should now work cross-platform.
303 * Revision 1.155 2007/10/23 20:12:45 fabiankeil
304 * Fix first CSUCCEED line to end in \r\n as required by RFC1945.
305 * Reported by Bert van Leeuwen in BR#1818808.
307 * Revision 1.154 2007/10/19 17:00:08 fabiankeil
308 * Downgrade "Flushing header and buffers" message to LOG_LEVEL_INFO.
310 * Revision 1.153 2007/10/14 14:12:41 fabiankeil
311 * When in daemon mode, close stderr after the configuration file has been
312 * parsed the first time. If logfile isn't set, stop logging. Fixes BR#897436.
314 * Revision 1.152 2007/10/04 18:03:34 fabiankeil
315 * - Fix a crash when parsing invalid requests whose first header
316 * is rejected by get_header(). Regression (re?)introduced
317 * in r1.143 by yours truly.
318 * - Move ACTION_VANILLA_WAFER handling into parsers.c's
319 * client_cookie_adder() to make sure send-vanilla-wafer can be
320 * controlled through tags (and thus regression-tested).
322 * Revision 1.151 2007/09/29 10:21:16 fabiankeil
323 * - Move get_filter_function() from jcc.c to filters.c
324 * so the filter functions can be static.
325 * - Don't bother filtering body-less responses.
327 * Revision 1.150 2007/09/28 16:39:29 fabiankeil
328 * Execute content filters through execute_content_filter().
330 * Revision 1.149 2007/09/04 15:08:48 fabiankeil
331 * Initialize req to NULL to make sure it's defined if the
332 * first read_socket() call fails. Reported by icmp30.
334 * Revision 1.148 2007/08/26 16:47:13 fabiankeil
335 * Add Stephen Gildea's --pre-chroot-nslookup patch [#1276666],
336 * extensive comments moved to user manual.
338 * Revision 1.147 2007/08/25 14:42:40 fabiankeil
339 * Don't crash if a broken header filter wiped out the request line.
341 * Revision 1.146 2007/08/20 17:09:32 fabiankeil
342 * Fix byte_count calculation in case of flushes
343 * and don't parse the server headers a second time.
345 * Revision 1.145 2007/08/19 13:13:31 fabiankeil
346 * - If there's a connection problem after we already forwarded
347 * parts of the original content, just hang up. Fixes BR#1776724.
348 * - Fix warnings about unused code on mingw32.
349 * - In case of flushes, calculate the byte count
350 * less incorrectly (I think).
352 * Revision 1.144 2007/08/11 14:43:22 fabiankeil
353 * Add some more prototypes for static functions.
355 * Revision 1.143 2007/08/05 13:58:19 fabiankeil
356 * Comment out request_contains_null_bytes() until it's used again.
358 * Revision 1.142 2007/08/05 13:50:26 fabiankeil
359 * #1763173 from Stefan Huehner: s@const static@static const@
360 * and declare some more functions static.
362 * Revision 1.141 2007/08/04 09:56:23 fabiankeil
363 * - Log rejected CONNECT requests with LOG_LEVEL_INFO
364 * and explain why they were rejected in the first place.
365 * - Fix the LOG_LEVEL_CLF message for crunches of unallowed
366 * CONNECT requests. The request line was missing.
367 * - Add two more XXX reminders as we don't have enough already.
369 * Revision 1.140 2007/07/21 11:51:36 fabiankeil
370 * As Hal noticed, checking dispatch_cgi() as the last cruncher
371 * looks like a bug if CGI requests are blocked unintentionally,
372 * so don't do it unless the user enabled the new config option
373 * "allow-cgi-request-crunching".
375 * Revision 1.139 2007/07/14 07:46:41 fabiankeil
376 * - Allow to rewrite the request destination behind the client's back.
377 * - Turn the weird-looking unconditional for loop that
378 * reads the client request into a conditional while loop.
379 * Move the stuff that only runs once out of the loop.
380 * - Move parts of chat(), server_content_type() and the
381 * necessary stuff to fix BR#1750917 into get_filter_function().
383 * Revision 1.138 2007/06/03 18:45:18 fabiankeil
384 * Temporary workaround for BR#1730105.
386 * Revision 1.137 2007/06/01 18:16:36 fabiankeil
387 * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
388 * deadlocks and crashes on OpenBSD and possibly other OS with neither
389 * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
390 * Thanks to Ralf Horstmann for report and solution.
392 * Revision 1.136 2007/06/01 16:41:11 fabiankeil
393 * Add forward-override{} to change the forwarding settings through
394 * action sections. This is mainly interesting to forward different
395 * clients differently (for example based on User-Agent or request
398 * Revision 1.135 2007/05/24 17:03:50 fabiankeil
399 * - Let usage() mention the --chroot parameter.
400 * - Use read_socket() consistently and always leave
401 * the last buffer byte alone, even in cases where
402 * null termination (currently) doesn't matter.
404 * Revision 1.134 2007/05/16 14:59:46 fabiankeil
405 * - Fix config file loading on Unix if no config file is specified.
406 * Since r1.97 Privoxy would always interpret the last argument as
407 * config file, even if it's a valid command line option.
408 * - Abort in case of unrecognized command line options. Closes #1719696.
409 * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
410 * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
412 * Revision 1.133 2007/05/04 11:23:19 fabiankeil
413 * - Don't rerun crunchers that only depend on the request URL.
414 * - Don't count redirects and CGI requests as "blocked requests".
416 * Revision 1.132 2007/04/25 15:15:17 fabiankeil
417 * Support crunching based on tags created by server-header taggers.
419 * Revision 1.131 2007/04/22 13:24:50 fabiankeil
420 * Make HTTP snippets static (again). Add a Content-Type for those
421 * with content so the browser doesn't guess it based on the URL.
423 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
424 * Move crunching and request line rebuilding out of chat().
426 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
427 * Introduce tags as alternative way to specify which
428 * actions apply to a request. At the moment tags can be
429 * created based on client and server headers.
431 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
432 * Don't CLF-log CONNECT requests twice.
434 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
435 * Log the source address for ACL-related connection drops.
437 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
438 * New config option: enforce-blocks.
440 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
441 * - Move null byte check into separate function.
442 * - Don't confuse the client with error pages
443 * if a CONNECT request was already confirmed.
445 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
446 * Speed up NULL byte escaping and only log the complete
447 * NULL byte requests with header debugging enabled.
449 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
450 * Answer requests that contain NULL bytes with
451 * a custom response instead of waiting for more
452 * data until the client eventually hangs up.
454 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
455 * - Move delivery and logging of crunched responses
456 * from chat() into send_crunch_response().
457 * - Display the reason for generating http_responses.
458 * - Log the content length for LOG_LEVEL_CLF correctly
459 * (still incorrect for some fixed responses).
460 * - Reword an incorrect comment about
461 * treat-forbidden-connects-like-blocks violating
463 * - Add some log messages.
465 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
466 * Move mutex initialization into separate
467 * function and exit in case of errors.
469 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
470 * - Start to reduce chat()'s line count and move
471 * parts of it into separate functions.
472 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
474 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
475 * - Add Proxy-Agent header to HTTP snippets that are
476 * supposed to reach HTTP clients only.
477 * - Made a few CONNECT log messages more descriptive.
478 * - Catch completely empty server responses (as seen
479 * with Tor's fake ".noconnect" top level domain).
480 * - Use shiny new "forwarding-failed" template for socks errors.
482 * Revision 1.118 2007/01/07 07:43:43 joergs
483 * AmigaOS4 support added.
485 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
486 * Added config option accept-intercepted-requests
487 * and disabled it by default.
489 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
490 * Reverted parts of my last commit
491 * to keep error handling working.
493 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
494 * Fixed gcc43 conversion warnings.
496 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
497 * Fix -pedantic ISO C warning about converting
498 * from function pointer to object pointer.
500 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
501 * Silence compiler warning I introduced with my last commit.
503 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
504 * Mutex protect rand() if POSIX threading
505 * is used, warn the user if that's not possible
506 * and stop using it on _WIN32 where it could
509 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
510 * Don't prevent core dumps by catching SIGABRT.
511 * It's rude and makes debugging unreasonable painful.
513 * Revision 1.110 2006/12/13 14:52:53 etresoft
514 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
516 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
517 * Privoxy is now able to run as intercepting
518 * proxy in combination with any packet filter
519 * that does the port redirection. The destination
520 * is extracted from the "Host:" header which
521 * should be available for nearly all requests.
523 * Moved HTTP snipplets into jcc.c.
524 * Added error message for gopher proxy requests.
526 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
527 * Only unlink the pidfile if it's actually used.
529 * Change order of interception checks to make
530 * it possible to block or redirect requests for
533 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
534 * Make pthread mutex locking more generic. Instead of
535 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
536 * and use mutex locking unless there is an _r function
537 * available. Better safe than sorry.
539 * Fixes "./configure --disable-pthread" and should result
540 * in less threading-related problems on pthread-using platforms,
541 * but it still doesn't fix BR#1122404.
543 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
544 * Move pthread.h inclusion from jcc.c to jcc.h.
545 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
547 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
548 * Don't exit after receiving the second SIGHUP on Solaris.
550 * Fixes BR 1052235, but the same problem may exist on other
551 * systems. Once 3.0.6 is out we should use sigset()
552 * where available and see if it breaks anything.
554 * Revision 1.104 2006/09/23 13:26:38 roro
555 * Replace TABs by spaces in source code.
557 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
558 * Fix +redirect{}. Didn't work with -fast-redirects.
560 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
561 * Respond with 400 and a short text message
562 * if the client tries to use Privoxy as FTP proxy.
564 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
565 * Make number of retries in case of forwarded-connect problems
566 * a config file option (forwarded-connect-retries) and use 0 as
569 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
570 * Set random(3) seed.
572 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
573 * Follow the OpenBSD port's lead and protect the resolve
574 * functions on OpenBSD as well.
576 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
577 * --user fix. Only use the user as group if no group is specified.
578 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
580 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
581 * Windows service (re-)integration
585 * --install[:service_name]
586 * --uninstall[:service_name]
589 * They work as follows:
590 * --install will create a service for you and then terminate.
591 * By default the service name will be "privoxy" (without the quotes).
592 * However you can run multiple services if you wish, just by adding
593 * a colon and then a name (no spaces).
595 * --uninstall follows the exact same rules a --install.
597 * --service is used when the program is executed by the service
598 * control manager, and in normal circumstances would never be
599 * used as a command line argument.
601 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
602 * Windows service integration
604 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
605 * Incorporate Fabian Keil's patch work:
606 http://www.fabiankeil.de/sourcecode/privoxy/
608 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
609 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
610 * with what was really the latest development (the v_3_0_branch branch)
612 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
613 * Thanks to Jindrich Makovicka for a race condition fix for the log
614 * file. The race condition remains for non-pthread implementations.
615 * Reference patch #1175720.
617 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
618 * Add the ability to check jpeg images for invalid
619 * lengths of comment blocks. Defensive strategy
620 * against the exploit:
621 * Microsoft Security Bulletin MS04-028
622 * Buffer Overrun in JPEG Processing (GDI+) Could
623 * Allow Code Execution (833987)
624 * Enabled with +inspect-jpegs in actions files.
626 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
627 * - Fixed usage info for non-unix platforms
628 * - Fixed small cmdline parsing bug
630 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
631 * Diagnostics: Now preserve the returncode of pthread_create
632 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
634 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
635 * No longer ignore SIGCHLD. Fixes bug #769381
637 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
638 * Close jarfile on graceful exit, remove stray line
640 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
641 * Cosmetics: Killed a warning, a typo and an allocation left at exit
643 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
644 * No longer rely on non-POSIX.1 extensions of getcwd().
647 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
648 * Replaced setenv() by posix-compliant putenv()
649 * Thanks to Neil McCalden (nmcc AT users.sf.net).
651 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
652 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
654 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
655 * Clean-up and extension of improvements for forked mode:
656 * - Child's return code now consists of flags RC_FLAG_*
657 * - Reporting toggle to parent now properly #ifdef'ed
658 * - Children now report blocking to parent. This enables
659 * statistics in forked mode
661 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
662 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
663 * Children now report having been toggled through _exit(17), parents
664 * watch for that code and toggle themselves if found.
666 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
667 * Wrapping all *_r functions (the non-_r versions of them) with
668 * mutex semaphores for OSX. Hopefully this will take care of all
669 * of those pesky crash reports.
671 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
672 * Fixed two mostly harmless mem leaks
674 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
675 * Fix: Head of global clients list now initialized to NULL
677 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
678 * Added basic support for OPTIONS and TRACE HTTP methods:
679 * - New interceptor direct_response() added in chat().
680 * - sed() moved to earlier in the process, so that the
681 * Host: header is evaluated before actions and forwarding
684 * Revision 1.92 2002/05/08 16:00:46 oes
685 * Chat's buffer handling:
686 * - Fixed bug with unchecked out-of-mem conditions
687 * while reading client request & server headers
688 * - No longer predict if the buffer limit will be exceeded
689 * in the next read -- check add_to_iob's new
690 * return code. If buffer couldn't be extended
691 * (policy or out-of-mem) while
692 * - reading from client: abort
693 * - reading server headers: send error page
694 * - buffering server body for filter: flush,
695 * and if that fails: send error page
697 * Revision 1.91 2002/04/08 20:35:58 swa
700 * Revision 1.90 2002/04/02 14:57:28 oes
701 * Made sending wafers independent of FEATURE_COOKIE_JAR
703 * Revision 1.89 2002/03/31 17:18:59 jongfoster
704 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
706 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
707 * More compiler warning message maintenance
709 * Revision 1.87 2002/03/26 22:29:54 swa
710 * we have a new homepage!
712 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
713 * Workaround for closing the jarfile before load_config() comes around again
715 * Revision 1.85 2002/03/24 15:23:33 jongfoster
718 * Revision 1.84 2002/03/24 13:25:43 swa
719 * name change related issues
721 * Revision 1.83 2002/03/16 23:54:06 jongfoster
722 * Adding graceful termination feature, to help look for memory leaks.
723 * If you enable this (which, by design, has to be done by hand
724 * editing config.h) and then go to http://i.j.b/die, then the program
725 * will exit cleanly after the *next* request. It should free all the
726 * memory that was used.
728 * Revision 1.82 2002/03/13 00:27:05 jongfoster
731 * Revision 1.81 2002/03/12 01:42:50 oes
732 * Introduced modular filters
734 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
735 * OS/2 port maintenance:
736 * - Fixed EMX build - it had decayed a little
737 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
738 * substituted a memset for now.
740 * Revision 1.79 2002/03/09 20:03:52 jongfoster
741 * - Making various functions return int rather than size_t.
742 * (Undoing a recent change). Since size_t is unsigned on
743 * Windows, functions like read_socket that return -1 on
744 * error cannot return a size_t.
746 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
747 * crashes, and also frequently caused JB to jump to 100%
748 * CPU and stay there. (Because it thought it had just
749 * read ((unsigned)-1) == 4Gb of data...)
751 * - The signature of write_socket has changed, it now simply
752 * returns success=0/failure=nonzero.
754 * - Trying to get rid of a few warnings --with-debug on
755 * Windows, I've introduced a new type "jb_socket". This is
756 * used for the socket file descriptors. On Windows, this
757 * is SOCKET (a typedef for unsigned). Everywhere else, it's
758 * an int. The error value can't be -1 any more, so it's
759 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
760 * Windows it maps to the #define INVALID_SOCKET.)
762 * - The signature of bind_port has changed.
764 * Revision 1.78 2002/03/08 21:35:04 oes
765 * Added optional group supplement to --user option. Will now use default group of user if no group given
767 * Revision 1.77 2002/03/07 03:52:06 oes
768 * - Fixed compiler warnings etc
769 * - Improved handling of failed DNS lookups
771 * Revision 1.76 2002/03/06 22:54:35 jongfoster
772 * Automated function-comment nitpicking.
774 * Revision 1.75 2002/03/06 10:02:19 oes
775 * Fixed stupid bug when --user was not given
777 * Revision 1.74 2002/03/06 00:49:31 jongfoster
778 * Fixing warning on Windows
779 * Making #ifdefs that refer to the same variable consistently
780 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
782 * Revision 1.73 2002/03/05 23:57:30 hal9
783 * Stray character 's' on line 1618 was breaking build.
785 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
786 * - Re-enable OS/2 building after new parms were added
787 * - Fix false out of memory report when resolving CGI templates when no IP
788 * address is available of failed attempt (a la no such domain)
790 * Revision 1.71 2002/03/05 18:13:56 oes
791 * Added --user option
793 * Revision 1.70 2002/03/05 04:52:42 oes
794 * Deleted non-errlog debugging code
796 * Revision 1.69 2002/03/04 23:50:00 jongfoster
797 * Splitting off bind_port() call into bind_port_helper(), with
800 * Revision 1.68 2002/03/04 20:17:32 oes
803 * Revision 1.67 2002/03/04 18:18:57 oes
804 * - Removed _DEBUG mode
805 * - Cleand up cmdline parsing
806 * - Introduced --no-daemon, --pidfile options
807 * - Cleaned up signal handling:
808 * - Terminate cleanly on INT, TERM and ABRT
809 * - Schedule logfile for re-opening on HUP
810 * - Ignore CHLD and PIPE
811 * - Leave the rest with their default handlers
812 * - Uniform handler registration
813 * - Added usage() function
814 * - Played styleguide police
816 * Revision 1.66 2002/03/03 15:06:55 oes
817 * Re-enabled automatic config reloading
819 * Revision 1.65 2002/03/03 14:49:11 oes
820 * Fixed CLF logging: Now uses client's original HTTP request
822 * Revision 1.64 2002/03/03 09:18:03 joergs
823 * Made jumbjuster work on AmigaOS again.
825 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
826 * Clean up a little CRLF unpleasantness that suddenly appeared
828 * Revision 1.62 2002/02/20 23:17:23 jongfoster
829 * Detecting some out-of memory conditions and exiting with a log message.
831 * Revision 1.61 2002/01/17 21:01:52 jongfoster
832 * Moving all our URL and URL pattern parsing code to urlmatch.c.
834 * Revision 1.60 2001/12/30 14:07:32 steudten
835 * - Add signal handling (unix)
836 * - Add SIGHUP handler (unix)
837 * - Add creation of pidfile (unix)
838 * - Add action 'top' in rc file (RH)
839 * - Add entry 'SIGNALS' to manpage
840 * - Add exit message to logfile (unix)
842 * Revision 1.59 2001/12/13 14:07:18 oes
843 * Fixed Bug: 503 error page now sent OK
845 * Revision 1.58 2001/11/30 23:37:24 jongfoster
846 * Renaming the Win32 config file to config.txt - this is almost the
847 * same as the corresponding UNIX name "config"
849 * Revision 1.57 2001/11/16 00:47:43 jongfoster
850 * Changing the tty-disconnection code to use setsid().
852 * Revision 1.56 2001/11/13 20:20:54 jongfoster
853 * Tabs->spaces, fixing a bug with missing {} around an if()
855 * Revision 1.55 2001/11/13 20:14:53 jongfoster
856 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
858 * Revision 1.54 2001/11/07 00:03:14 steudten
859 * Give reliable return value if an error
860 * occurs not just 0 with new daemon mode.
862 * Revision 1.53 2001/11/05 21:41:43 steudten
863 * Add changes to be a real daemon just for unix os.
864 * (change cwd to /, detach from controlling tty, set
865 * process group and session leader to the own process.
867 * Add some fatal-error log message for failed malloc().
868 * Add '-d' if compiled with 'configure --with-debug' to
869 * enable debug output.
871 * Revision 1.52 2001/10/26 20:11:20 jongfoster
872 * Fixing type mismatch
874 * Revision 1.51 2001/10/26 17:38:28 oes
877 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
878 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
879 * threads to call select() simultaneously. So, it's time to do a real, live,
880 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
881 * (native). Both versions will work, but using __OS2__ offers multi-threading.
883 * Revision 1.49 2001/10/23 21:41:35 jongfoster
884 * Added call to initialize the (statically-allocated of course)
885 * "out of memory" CGI response.
887 * Revision 1.48 2001/10/10 19:56:46 jongfoster
888 * Moving some code that wasn't cookie-related out of an #ifdef
891 * Revision 1.47 2001/10/10 16:44:36 oes
892 * Added CONNECT destination port limitation check
894 * Revision 1.46 2001/10/08 15:17:41 oes
895 * Re-enabled SSL forwarding
897 * Revision 1.45 2001/10/07 15:42:11 oes
898 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
900 * Moved downgrading of the HTTP version from parse_http_request to
901 * chat(), since we can't decide if it is necessary before we have
902 * determined the actions for the URL. The HTTP command is now
903 * *always* re-built so the repairs need no longer be special-cased.
905 * filter_popups now gets a csp pointer so it can raise the new
906 * CSP_FLAG_MODIFIED flag.
910 * Added configurable size limit for the IOB. If the IOB grows so
911 * large that the next read would exceed the limit, the header
912 * is generated, and the header & unfiltered buffer are flushed
913 * to the client. Chat then continues in non-buffering,
914 * non-filtering body mode.
916 * Revision 1.44 2001/10/02 18:13:57 oes
919 * Revision 1.43 2001/10/02 15:32:13 oes
920 * Moved generation of hdr
922 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
923 * Cleaning up 2 compiler warnings on OS/2.
925 * Revision 1.41 2001/09/16 17:05:14 jongfoster
926 * Removing unused #include showarg.h
928 * Revision 1.40 2001/09/16 15:41:45 jongfoster
929 * Fixing signed/unsigned comparison warning.
931 * Revision 1.39 2001/09/16 13:21:27 jongfoster
932 * Changes to use new list functions.
934 * Revision 1.38 2001/09/16 13:01:46 jongfoster
935 * Removing redundant function call that zeroed zalloc()'d memory.
937 * Revision 1.37 2001/09/10 11:12:24 oes
938 * Deleted unused variable
940 * Revision 1.36 2001/09/10 10:56:15 oes
941 * Silenced compiler warnings
943 * Revision 1.35 2001/07/31 14:44:22 oes
944 * Deleted unused size parameter from filter_popups()
946 * Revision 1.34 2001/07/30 22:08:36 jongfoster
947 * Tidying up #defines:
948 * - All feature #defines are now of the form FEATURE_xxx
949 * - Permanently turned off WIN_GUI_EDIT
950 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
952 * Revision 1.33 2001/07/29 19:32:00 jongfoster
953 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
955 * Revision 1.32 2001/07/29 18:47:05 jongfoster
956 * Adding missing #include "loadcfg.h"
958 * Revision 1.31 2001/07/29 12:17:48 oes
959 * Applied pthread fix by Paul Lieverse
961 * Revision 1.30 2001/07/25 22:57:13 jongfoster
962 * __BEOS__ no longer overrides FEATURE_PTHREAD.
963 * This is because FEATURE_PTHREAD will soon be widely used, so I
964 * want to keep it simple.
966 * Revision 1.29 2001/07/24 12:47:06 oes
967 * Applied BeOS support update by Eugenia
969 * Revision 1.28 2001/07/23 13:26:12 oes
970 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
972 * Revision 1.27 2001/07/19 19:09:47 haroon
973 * - Added code to take care of the situation where while processing the first
974 * server response (which includes the server header), after finding the end
975 * of the headers we were not looking past the end of the headers for
976 * content modification. I enabled it for filter_popups.
977 * Someone else should look to see if other similar operations should be
978 * done to the discarded portion of the buffer.
980 * Note 2001/07/20: No, the other content modification mechanisms will process
981 * the whole iob later anyway. --oes
983 * Revision 1.26 2001/07/18 12:31:36 oes
986 * Revision 1.25 2001/07/15 19:43:49 jongfoster
987 * Supports POSIX threads.
988 * Also removed some unused #includes.
990 * Revision 1.24 2001/07/13 14:00:40 oes
991 * - Generic content modification scheme:
992 * Each feature has its own applicability flag that is set
993 * from csp->action->flags.
994 * Replaced the "filtering" int flag , by a function pointer
995 * "content_filter" to the function that will do the content
996 * modification. If it is != NULL, the document will be buffered
997 * and processed through *content_filter, which must set
998 * csp->content_length and return a modified copy of the body
999 * or return NULL (on failiure).
1000 * - Changed csp->is_text to the more generic bitmap csp->content_type
1001 * which can currently take the valued CT_TEXT or CT_GIF
1002 * - Reformatting etc
1003 * - Removed all #ifdef PCRS
1005 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
1006 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
1007 * the `block_acl' call. This prevents a compilation error when the user
1008 * does not wish to use the "ACL" feature.
1010 * Revision 1.22 2001/06/29 21:45:41 oes
1011 * Indentation, CRLF->LF, Tab-> Space
1013 * Revision 1.21 2001/06/29 13:29:36 oes
1014 * - Cleaned up, improved comments
1015 * - Unified all possible interceptors (CGI,
1016 * block, trust, fast_redirect) in one
1017 * place, with one (CGI) answer generation
1018 * mechansim. Much clearer now.
1019 * - Removed the GIF image generation, which
1020 * is now done in filters.c:block_url()
1021 * - Made error conditions like domain lookup
1022 * failiure or (various) problems while talking
1023 * to the server use cgi.c:error_response()
1024 * instead of generating HTML/HTTP in chat() (yuck!)
1025 * - Removed logentry from cancelled commit
1027 * Revision 1.20 2001/06/09 10:55:28 jongfoster
1028 * Changing BUFSIZ ==> BUFFER_SIZE
1030 * Revision 1.19 2001/06/07 23:12:52 jongfoster
1031 * Replacing function pointer in struct gateway with a directly
1032 * called function forwarded_connect().
1033 * Replacing struct gateway with struct forward_spec
1035 * Revision 1.18 2001/06/03 19:12:16 oes
1036 * introduced new cgi handling
1038 * Revision 1.17 2001/06/01 20:07:23 jongfoster
1039 * Now uses action +image-blocker{} rather than config->tinygif
1041 * Revision 1.16 2001/06/01 18:49:17 jongfoster
1042 * Replaced "list_share" with "list" - the tiny memory gain was not
1043 * worth the extra complexity.
1045 * Revision 1.15 2001/05/31 21:24:47 jongfoster
1046 * Changed "permission" to "action" throughout.
1047 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
1048 * Moved vanilla wafer check into chat(), since we must now
1049 * decide whether or not to add it based on the URL.
1051 * Revision 1.14 2001/05/29 20:14:01 joergs
1052 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
1055 * Revision 1.13 2001/05/29 09:50:24 jongfoster
1056 * Unified blocklist/imagelist/permissionslist.
1057 * File format is still under discussion, but the internal changes
1058 * are (mostly) done.
1060 * Also modified interceptor behaviour:
1061 * - We now intercept all URLs beginning with one of the following
1062 * prefixes (and *only* these prefixes):
1064 * * http://ijbswa.sf.net/config/
1065 * * http://ijbswa.sourceforge.net/config/
1066 * - New interceptors "home page" - go to http://i.j.b/ to see it.
1067 * - Internal changes so that intercepted and fast redirect pages
1068 * are not replaced with an image.
1069 * - Interceptors now have the option to send a binary page direct
1070 * to the client. (i.e. ijb-send-banner uses this)
1071 * - Implemented show-url-info interceptor. (Which is why I needed
1072 * the above interceptors changes - a typical URL is
1073 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
1074 * The previous mechanism would not have intercepted that, and
1075 * if it had been intercepted then it then it would have replaced
1076 * it with an image.)
1078 * Revision 1.12 2001/05/27 22:17:04 oes
1080 * - re_process_buffer no longer writes the modified buffer
1081 * to the client, which was very ugly. It now returns the
1082 * buffer, which it is then written by chat.
1084 * - content_length now adjusts the Content-Length: header
1085 * for modified documents rather than crunch()ing it.
1086 * (Length info in csp->content_length, which is 0 for
1087 * unmodified documents)
1089 * - For this to work, sed() is called twice when filtering.
1091 * Revision 1.11 2001/05/26 17:27:53 jongfoster
1092 * Added support for CLF and fixed LOG_LEVEL_LOG.
1093 * Also did CRLF->LF fix of my previous patch.
1095 * Revision 1.10 2001/05/26 15:26:15 jongfoster
1096 * ACL feature now provides more security by immediately dropping
1097 * connections from untrusted hosts.
1099 * Revision 1.9 2001/05/26 00:28:36 jongfoster
1100 * Automatic reloading of config file.
1101 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
1102 * Most of the global variables have been moved to a new
1103 * struct configuration_spec, accessed through csp->config->globalname
1104 * Most of the globals remaining are used by the Win32 GUI.
1106 * Revision 1.8 2001/05/25 22:43:18 jongfoster
1107 * Fixing minor memory leak and buffer overflow.
1109 * Revision 1.7 2001/05/25 22:34:30 jongfoster
1112 * Revision 1.6 2001/05/23 00:13:58 joergs
1113 * AmigaOS support fixed.
1115 * Revision 1.5 2001/05/22 18:46:04 oes
1117 * - Enabled filtering banners by size rather than URL
1118 * by adding patterns that replace all standard banner
1119 * sizes with the "Junkbuster" gif to the re_filterfile
1121 * - Enabled filtering WebBugs by providing a pattern
1122 * which kills all 1x1 images
1124 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
1125 * which is selected by the (nonstandard and therefore
1126 * capital) letter 'U' in the option string.
1127 * It causes the quantifiers to be ungreedy by default.
1128 * Appending a ? turns back to greedy (!).
1130 * - Added a new interceptor ijb-send-banner, which
1131 * sends back the "Junkbuster" gif. Without imagelist or
1132 * MSIE detection support, or if tinygif = 1, or the
1133 * URL isn't recognized as an imageurl, a lame HTML
1134 * explanation is sent instead.
1136 * - Added new feature, which permits blocking remote
1137 * script redirects and firing back a local redirect
1139 * The feature is conditionally compiled, i.e. it
1140 * can be disabled with --disable-fast-redirects,
1141 * plus it must be activated by a "fast-redirects"
1142 * line in the config file, has its own log level
1143 * and of course wants to be displayed by show-proxy-args
1144 * Note: Boy, all the #ifdefs in 1001 locations and
1145 * all the fumbling with configure.in and acconfig.h
1146 * were *way* more work than the feature itself :-(
1148 * - Because a generic redirect template was needed for
1149 * this, tinygif = 3 now uses the same.
1151 * - Moved GIFs, and other static HTTP response templates
1154 * - Some minor fixes
1156 * - Removed some >400 CRs again (Jon, you really worked
1159 * Revision 1.4 2001/05/21 19:34:01 jongfoster
1160 * Made failure to bind() a fatal error.
1162 * Revision 1.3 2001/05/20 01:21:20 jongfoster
1163 * Version 2.9.4 checkin.
1164 * - Merged popupfile and cookiefile, and added control over PCRS
1165 * filtering, in new "permissionsfile".
1166 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
1167 * file error you now get a message box (in the Win32 GUI) rather
1168 * than the program exiting with no explanation.
1169 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
1171 * - Removed tabs from "config"
1172 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
1173 * - Bumped up version number.
1175 * Revision 1.2 2001/05/17 22:34:44 oes
1176 * - Added hint on GIF char array generation to jcc.c
1177 * - Cleaned CRLF's from the sources and related files
1178 * - Repaired logging for REF and FRC
1180 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
1181 * Initial import of version 2.9.3 source tree
1184 *********************************************************************/
1190 #include <sys/types.h>
1199 # ifndef FEATURE_PTHREAD
1203 # include <windows.h>
1204 # include <process.h>
1205 # endif /* ndef FEATURE_PTHREAD */
1208 # ifndef _WIN_CONSOLE
1209 # include "w32log.h"
1210 # endif /* ndef _WIN_CONSOLE */
1211 # include "w32svrapi.h"
1213 #else /* ifndef _WIN32 */
1215 # if !defined (__OS2__)
1216 # include <unistd.h>
1217 # include <sys/wait.h>
1218 # endif /* ndef __OS2__ */
1219 # include <sys/time.h>
1220 # include <sys/stat.h>
1221 # include <sys/ioctl.h>
1224 #include <sys/termios.h>
1232 # include <signal.h>
1235 # include <socket.h> /* BeOS has select() for sockets only. */
1236 # include <OS.h> /* declarations for threads and stuff. */
1239 # if defined(__EMX__) || defined(__OS2__)
1240 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
1245 #define bzero(B,N) memset(B,0x00,n)
1249 # include <select.h>
1254 #include "project.h"
1257 #include "filters.h"
1258 #include "loaders.h"
1259 #include "parsers.h"
1260 #include "miscutil.h"
1262 #include "jbsockets.h"
1263 #include "gateway.h"
1264 #include "actions.h"
1266 #include "loadcfg.h"
1267 #include "urlmatch.h"
1269 const char jcc_h_rcs[] = JCC_H_VERSION;
1270 const char project_h_rcs[] = PROJECT_H_VERSION;
1273 struct client_state clients[1];
1274 struct file_list files[1];
1276 #ifdef FEATURE_STATISTICS
1277 int urls_read = 0; /* total nr of urls read inc rejected */
1278 int urls_rejected = 0; /* total nr of urls rejected */
1279 #endif /* def FEATURE_STATISTICS */
1281 #ifdef FEATURE_GRACEFUL_TERMINATION
1282 int g_terminate = 0;
1285 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1286 static void sig_handler(int the_signal);
1288 static int client_protocol_is_unsupported(const struct client_state *csp, char *req);
1289 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
1290 static jb_err get_server_headers(struct client_state *csp);
1291 static const char *crunch_reason(const struct http_response *rsp);
1292 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp);
1293 static char *get_request_line(struct client_state *csp);
1294 static jb_err receive_client_request(struct client_state *csp);
1295 static jb_err parse_client_request(struct client_state *csp);
1296 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
1297 static jb_err change_request_destination(struct client_state *csp);
1298 static void chat(struct client_state *csp);
1299 static void serve(struct client_state *csp);
1300 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1301 static void usage(const char *myname);
1303 static void initialize_mutexes(void);
1304 static jb_socket bind_port_helper(struct configuration_spec *config);
1305 static void listen_loop(void);
1308 void serve(struct client_state *csp);
1309 #else /* ifndef AMIGA */
1310 static void serve(struct client_state *csp);
1311 #endif /* def AMIGA */
1314 static int32 server_thread(void *data);
1315 #endif /* def __BEOS__ */
1318 #define sleep(N) Sleep(((N) * 1000))
1322 #define sleep(N) DosSleep(((N) * 100))
1325 #ifdef MUTEX_LOCKS_AVAILABLE
1327 * XXX: Does the locking stuff really belong in this file?
1329 privoxy_mutex_t log_mutex;
1330 privoxy_mutex_t log_init_mutex;
1331 privoxy_mutex_t connection_reuse_mutex;
1333 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
1334 privoxy_mutex_t resolver_mutex;
1335 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
1337 #ifndef HAVE_GMTIME_R
1338 privoxy_mutex_t gmtime_mutex;
1339 #endif /* ndef HAVE_GMTIME_R */
1341 #ifndef HAVE_LOCALTIME_R
1342 privoxy_mutex_t localtime_mutex;
1343 #endif /* ndef HAVE_GMTIME_R */
1346 privoxy_mutex_t rand_mutex;
1347 #endif /* ndef HAVE_RANDOM */
1349 #endif /* def MUTEX_LOCKS_AVAILABLE */
1352 const char *basedir = NULL;
1353 const char *pidfile = NULL;
1354 static int received_hup_signal = 0;
1355 #endif /* defined unix */
1357 /* HTTP snipplets. */
1358 static const char CSUCCEED[] =
1359 "HTTP/1.0 200 Connection established\r\n"
1360 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
1362 static const char CHEADER[] =
1363 "HTTP/1.0 400 Invalid header received from client\r\n"
1364 "Proxy-Agent: Privoxy " VERSION "\r\n"
1365 "Content-Type: text/plain\r\n"
1366 "Connection: close\r\n\r\n"
1367 "Invalid header received from client.\r\n";
1369 static const char FTP_RESPONSE[] =
1370 "HTTP/1.0 400 Invalid request received from client\r\n"
1371 "Content-Type: text/plain\r\n"
1372 "Connection: close\r\n\r\n"
1373 "Invalid request. Privoxy doesn't support FTP.\r\n";
1375 static const char GOPHER_RESPONSE[] =
1376 "HTTP/1.0 400 Invalid request received from client\r\n"
1377 "Content-Type: text/plain\r\n"
1378 "Connection: close\r\n\r\n"
1379 "Invalid request. Privoxy doesn't support gopher.\r\n";
1381 /* XXX: should be a template */
1382 static const char MISSING_DESTINATION_RESPONSE[] =
1383 "HTTP/1.0 400 Bad request received from client\r\n"
1384 "Proxy-Agent: Privoxy " VERSION "\r\n"
1385 "Content-Type: text/plain\r\n"
1386 "Connection: close\r\n\r\n"
1387 "Bad request. Privoxy was unable to extract the destination.\r\n";
1389 /* XXX: should be a template */
1390 static const char NO_SERVER_DATA_RESPONSE[] =
1391 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1392 "Proxy-Agent: Privoxy " VERSION "\r\n"
1393 "Content-Type: text/plain\r\n"
1394 "Connection: close\r\n\r\n"
1395 "Empty server or forwarder response.\r\n"
1396 "The connection has been closed but Privoxy didn't receive any data.\r\n";
1398 /* XXX: should be a template */
1399 static const char INVALID_SERVER_HEADERS_RESPONSE[] =
1400 "HTTP/1.0 502 Server or forwarder response invalid\r\n"
1401 "Proxy-Agent: Privoxy " VERSION "\r\n"
1402 "Content-Type: text/plain\r\n"
1403 "Connection: close\r\n\r\n"
1404 "Bad response. The server or forwarder response doesn't look like HTTP.\r\n";
1407 /* XXX: should be a template */
1408 static const char NULL_BYTE_RESPONSE[] =
1409 "HTTP/1.0 400 Bad request received from client\r\n"
1410 "Proxy-Agent: Privoxy " VERSION "\r\n"
1411 "Content-Type: text/plain\r\n"
1412 "Connection: close\r\n\r\n"
1413 "Bad request. Null byte(s) before end of request.\r\n";
1416 /* XXX: should be a template */
1417 static const char MESSED_UP_REQUEST_RESPONSE[] =
1418 "HTTP/1.0 400 Malformed request after rewriting\r\n"
1419 "Proxy-Agent: Privoxy " VERSION "\r\n"
1420 "Content-Type: text/plain\r\n"
1421 "Connection: close\r\n\r\n"
1422 "Bad request. Messed up with header filters.\r\n";
1424 /* XXX: should be a template */
1425 static const char CONNECTION_TIMEOUT_RESPONSE[] =
1426 "HTTP/1.0 502 Connection timeout\r\n"
1427 "Proxy-Agent: Privoxy " VERSION "\r\n"
1428 "Content-Type: text/plain\r\n"
1429 "Connection: close\r\n\r\n"
1430 "The connection timed out.\r\n";
1432 /* A function to crunch a response */
1433 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
1435 /* Crunch function flags */
1436 #define CF_NO_FLAGS 0
1437 /* Cruncher applies to forced requests as well */
1438 #define CF_IGNORE_FORCE 1
1439 /* Crunched requests are counted for the block statistics */
1440 #define CF_COUNT_AS_REJECT 2
1442 /* A crunch function and its flags */
1445 const crunch_func_ptr cruncher;
1449 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
1451 /* Complete list of cruncher functions */
1452 static const struct cruncher crunchers_all[] = {
1453 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
1454 { block_url, CF_COUNT_AS_REJECT },
1455 #ifdef FEATURE_TRUST
1456 { trust_url, CF_COUNT_AS_REJECT },
1457 #endif /* def FEATURE_TRUST */
1458 { redirect_url, CF_NO_FLAGS },
1459 { dispatch_cgi, CF_IGNORE_FORCE},
1463 /* Light version, used after tags are applied */
1464 static const struct cruncher crunchers_light[] = {
1465 { block_url, CF_COUNT_AS_REJECT },
1466 { redirect_url, CF_NO_FLAGS },
1472 * XXX: Don't we really mean
1478 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1479 /*********************************************************************
1481 * Function : sig_handler
1483 * Description : Signal handler for different signals.
1484 * Exit gracefully on TERM and INT
1485 * or set a flag that will cause the errlog
1486 * to be reopened by the main thread on HUP.
1489 * 1 : the_signal = the signal cause this function to call
1493 *********************************************************************/
1494 static void sig_handler(int the_signal)
1500 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1512 received_hup_signal = 1;
1518 * We shouldn't be here, unless we catch signals
1519 * in main() that we can't handle here!
1521 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1529 /*********************************************************************
1531 * Function : client_protocol_is_unsupported
1533 * Description : Checks if the client used a known unsupported
1534 * protocol and deals with it by sending an error
1538 * 1 : csp = Current client state (buffers, headers, etc...)
1539 * 2 : req = the first request line send by the client
1541 * Returns : TRUE if an error response has been generated, or
1542 * FALSE if the request doesn't look invalid.
1544 *********************************************************************/
1545 static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1548 * If it's a FTP or gopher request, we don't support it.
1550 * These checks are better than nothing, but they might
1551 * not work in all configurations and some clients might
1552 * have problems digesting the answer.
1554 * They should, however, never cause more problems than
1555 * Privoxy's old behaviour (returning the misleading HTML
1558 * "Could not resolve http://(ftp|gopher)://example.org").
1560 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1562 const char *response = NULL;
1563 const char *protocol = NULL;
1565 if (!strncmpic(req, "GET ftp://", 10))
1567 response = FTP_RESPONSE;
1572 response = GOPHER_RESPONSE;
1573 protocol = "GOPHER";
1575 log_error(LOG_LEVEL_ERROR,
1576 "%s tried to use Privoxy as %s proxy: %s",
1577 csp->ip_addr_str, protocol, req);
1578 log_error(LOG_LEVEL_CLF,
1579 "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1581 write_socket(csp->cfd, response, strlen(response));
1590 /*********************************************************************
1592 * Function : get_request_destination_elsewhere
1594 * Description : If the client's request was redirected into
1595 * Privoxy without the client's knowledge,
1596 * the request line lacks the destination host.
1598 * This function tries to get it elsewhere,
1599 * provided accept-intercepted-requests is enabled.
1601 * "Elsewhere" currently only means "Host: header",
1602 * but in the future we may ask the redirecting
1603 * packet filter to look the destination up.
1605 * If the destination stays unknown, an error
1606 * response is send to the client and headers
1607 * are freed so that chat() can return directly.
1610 * 1 : csp = Current client state (buffers, headers, etc...)
1611 * 2 : headers = a header list
1613 * Returns : JB_ERR_OK if the destination is now known, or
1614 * JB_ERR_PARSE if it isn't.
1616 *********************************************************************/
1617 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1621 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1623 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1624 " Privoxy isn't configured to accept intercepted requests.",
1625 csp->ip_addr_str, csp->http->cmd);
1626 /* XXX: Use correct size */
1627 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1628 csp->ip_addr_str, csp->http->cmd);
1630 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1631 destroy_list(headers);
1633 return JB_ERR_PARSE;
1635 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1637 /* Split the domain we just got for pattern matching */
1638 init_domain_components(csp->http);
1644 /* We can't work without destination. Go spread the news.*/
1646 req = list_to_text(headers);
1648 /* XXX: Use correct size */
1649 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1650 csp->ip_addr_str, csp->http->cmd);
1651 log_error(LOG_LEVEL_ERROR,
1652 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1653 csp->ip_addr_str, csp->http->cmd, req);
1656 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
1657 destroy_list(headers);
1659 return JB_ERR_PARSE;
1662 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1663 * to get the destination IP address, use it as host directly
1664 * or do a reverse DNS lookup first.
1669 /*********************************************************************
1671 * Function : get_server_headers
1673 * Description : Parses server headers in iob and fills them
1674 * into csp->headers so that they can later be
1678 * 1 : csp = Current client state (buffers, headers, etc...)
1680 * Returns : JB_ERR_OK if everything went fine, or
1681 * JB_ERR_PARSE if the headers were incomplete.
1683 *********************************************************************/
1684 static jb_err get_server_headers(struct client_state *csp)
1686 int continue_hack_in_da_house = 0;
1689 while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
1694 * continue hack in da house. Ignore the ending of
1695 * this head and continue enlisting header lines.
1696 * The reason is described below.
1698 enlist(csp->headers, "");
1699 continue_hack_in_da_house = 0;
1702 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1705 * It's a bodyless continue response, don't
1706 * stop header parsing after reaching its end.
1708 * As a result Privoxy will concatenate the
1709 * next response's head and parse and deliver
1710 * the headers as if they belonged to one request.
1712 * The client will separate them because of the
1713 * empty line between them.
1715 * XXX: What we're doing here is clearly against
1716 * the intended purpose of the continue header,
1717 * and under some conditions (HTTP/1.0 client request)
1718 * it's a standard violation.
1720 * Anyway, "sort of against the spec" is preferable
1721 * to "always getting confused by Continue responses"
1722 * (Privoxy's behaviour before this hack was added)
1724 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1725 continue_hack_in_da_house = 1;
1727 else if (*header == '\0')
1730 * If the header is empty, but the Continue hack
1731 * isn't active, we can assume that we reached the
1732 * end of the buffer before we hit the end of the
1735 * Inform the caller an let it decide how to handle it.
1737 return JB_ERR_PARSE;
1740 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1743 * XXX: Should we quit the request and return a
1744 * out of memory error page instead?
1746 log_error(LOG_LEVEL_ERROR,
1747 "Out of memory while enlisting server headers. %s lost.",
1757 /*********************************************************************
1759 * Function : crunch_reason
1761 * Description : Translates the crunch reason code into a string.
1764 * 1 : rsp = a http_response
1766 * Returns : A string with the crunch reason or an error description.
1768 *********************************************************************/
1769 static const char *crunch_reason(const struct http_response *rsp)
1771 char * reason = NULL;
1773 assert(rsp != NULL);
1776 return "Internal error while searching for crunch reason";
1779 switch (rsp->reason)
1781 case RSP_REASON_UNSUPPORTED:
1782 reason = "Unsupported HTTP feature";
1784 case RSP_REASON_BLOCKED:
1787 case RSP_REASON_UNTRUSTED:
1788 reason = "Untrusted";
1790 case RSP_REASON_REDIRECTED:
1791 reason = "Redirected";
1793 case RSP_REASON_CGI_CALL:
1794 reason = "CGI Call";
1796 case RSP_REASON_NO_SUCH_DOMAIN:
1797 reason = "DNS failure";
1799 case RSP_REASON_FORWARDING_FAILED:
1800 reason = "Forwarding failed";
1802 case RSP_REASON_CONNECT_FAILED:
1803 reason = "Connection failure";
1805 case RSP_REASON_OUT_OF_MEMORY:
1806 reason = "Out of memory (may mask other reasons)";
1809 reason = "No reason recorded";
1817 /*********************************************************************
1819 * Function : send_crunch_response
1821 * Description : Delivers already prepared response for
1822 * intercepted requests, logs the interception
1823 * and frees the response.
1826 * 1 : csp = Current client state (buffers, headers, etc...)
1827 * 1 : rsp = Fully prepared response. Will be freed on exit.
1829 * Returns : Nothing.
1831 *********************************************************************/
1832 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp)
1834 const struct http_request *http = csp->http;
1835 char status_code[4];
1837 assert(rsp != NULL);
1838 assert(rsp->head != NULL);
1843 * Not supposed to happen. If it does
1844 * anyway, treat it as an unknown error.
1846 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1847 /* return code doesn't matter */
1852 /* If rsp is still NULL, we have serious internal problems. */
1853 log_error(LOG_LEVEL_FATAL,
1854 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1858 * Extract the status code from the actual head
1859 * that was send to the client. It is the only
1860 * way to get it right for all requests, including
1861 * the fixed ones for out-of-memory problems.
1863 * A head starts like this: 'HTTP/1.1 200...'
1867 status_code[0] = rsp->head[9];
1868 status_code[1] = rsp->head[10];
1869 status_code[2] = rsp->head[11];
1870 status_code[3] = '\0';
1872 /* Write the answer to the client */
1873 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1874 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1876 /* There is nothing we can do about it. */
1877 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1880 /* Log that the request was crunched and why. */
1881 log_error(LOG_LEVEL_CRUNCH, "%s: %s", crunch_reason(rsp), http->url);
1882 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %d",
1883 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1885 /* Clean up and return */
1886 if (cgi_error_memory() != rsp)
1888 free_http_response(rsp);
1895 /*********************************************************************
1897 * Function : request_contains_null_bytes
1899 * Description : Checks for NULL bytes in the request and sends
1900 * an error message to the client if any were found.
1902 * XXX: currently not used, see comment in chat().
1905 * 1 : csp = Current client state (buffers, headers, etc...)
1906 * 2 : buf = Data from the client's request to check.
1907 * 3 : len = The data length.
1909 * Returns : TRUE if the request contained one or more NULL bytes, or
1912 *********************************************************************/
1913 static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1915 size_t c_len; /* Request lenght when treated as C string */
1917 c_len = strlen(buf);
1922 * Null byte(s) found. Log the request,
1923 * return an error response and hang up.
1925 size_t tmp_len = c_len;
1930 * Replace NULL byte(s) with '°' characters
1931 * so the request can be logged as string.
1932 * XXX: Is there a better replacement character?
1935 tmp_len += strlen(buf+tmp_len);
1936 } while (tmp_len < len);
1938 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1939 "(length=%d, strlen=%d).", csp->ip_addr_str, len, c_len);
1940 log_error(LOG_LEVEL_HEADER,
1941 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1943 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
1945 /* XXX: Log correct size */
1946 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1956 /*********************************************************************
1958 * Function : crunch_response_triggered
1960 * Description : Checks if the request has to be crunched,
1961 * and delivers the crunch response if necessary.
1964 * 1 : csp = Current client state (buffers, headers, etc...)
1965 * 2 : crunchers = list of cruncher functions to run
1967 * Returns : TRUE if the request was answered with a crunch response
1970 *********************************************************************/
1971 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
1973 struct http_response *rsp = NULL;
1974 const struct cruncher *c;
1977 * If CGI request crunching is disabled,
1978 * check the CGI dispatcher out of order to
1979 * prevent unintentional blocks or redirects.
1981 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
1982 && (NULL != (rsp = dispatch_cgi(csp))))
1984 /* Deliver, log and free the interception response. */
1985 send_crunch_response(csp, rsp);
1989 for (c = crunchers; c->cruncher != NULL; c++)
1992 * Check the cruncher if either Privoxy is toggled
1993 * on and the request isn't forced, or if the cruncher
1994 * applies to forced requests as well.
1996 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
1997 !(csp->flags & CSP_FLAG_FORCED)) ||
1998 (c->flags & CF_IGNORE_FORCE))
2000 rsp = c->cruncher(csp);
2003 /* Deliver, log and free the interception response. */
2004 send_crunch_response(csp, rsp);
2005 #ifdef FEATURE_STATISTICS
2006 if (c->flags & CF_COUNT_AS_REJECT)
2008 csp->flags |= CSP_FLAG_REJECTED;
2010 #endif /* def FEATURE_STATISTICS */
2021 /*********************************************************************
2023 * Function : build_request_line
2025 * Description : Builds the HTTP request line.
2027 * If a HTTP forwarder is used it expects the whole URL,
2028 * web servers only get the path.
2031 * 1 : csp = Current client state (buffers, headers, etc...)
2032 * 2 : fwd = The forwarding spec used for the request
2033 * XXX: Should use http->fwd instead.
2034 * 3 : request_line = The old request line which will be replaced.
2036 * Returns : Nothing. Terminates in case of memory problems.
2038 *********************************************************************/
2039 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
2041 struct http_request *http = csp->http;
2043 assert(http->ssl == 0);
2046 * Downgrade http version from 1.1 to 1.0
2047 * if +downgrade action applies.
2049 if ( (csp->action->flags & ACTION_DOWNGRADE)
2050 && (!strcmpic(http->ver, "HTTP/1.1")))
2053 http->ver = strdup("HTTP/1.0");
2055 if (http->ver == NULL)
2057 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
2062 * Rebuild the request line.
2064 freez(*request_line);
2065 *request_line = strdup(http->gpc);
2066 string_append(request_line, " ");
2068 if (fwd->forward_host)
2070 string_append(request_line, http->url);
2074 string_append(request_line, http->path);
2076 string_append(request_line, " ");
2077 string_append(request_line, http->ver);
2079 if (*request_line == NULL)
2081 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
2083 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
2087 /*********************************************************************
2089 * Function : change_request_destination
2091 * Description : Parse a (rewritten) request line and regenerate
2092 * the http request data.
2095 * 1 : csp = Current client state (buffers, headers, etc...)
2097 * Returns : Forwards the parse_http_request() return code.
2098 * Terminates in case of memory problems.
2100 *********************************************************************/
2101 static jb_err change_request_destination(struct client_state *csp)
2103 struct http_request *http = csp->http;
2106 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
2107 free_http_request(http);
2108 err = parse_http_request(csp->headers->first->str, http, csp);
2109 if (JB_ERR_OK != err)
2111 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
2112 jb_err_to_string(err));
2116 /* XXX: ocmd is a misleading name */
2117 http->ocmd = strdup(http->cmd);
2118 if (http->ocmd == NULL)
2120 log_error(LOG_LEVEL_FATAL,
2121 "Out of memory copying rewritten HTTP request line");
2129 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2130 /*********************************************************************
2132 * Function : server_response_is_complete
2134 * Description : Determines whether we should stop reading
2135 * from the server socket.
2138 * 1 : csp = Current client state (buffers, headers, etc...)
2139 * 2 : content_length = Length of content received so far.
2141 * Returns : TRUE if the response is complete,
2144 *********************************************************************/
2145 static int server_response_is_complete(struct client_state *csp, size_t content_length)
2147 int content_length_known = (csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
2149 if (!strcmpic(csp->http->gpc, "HEAD"))
2152 * "HEAD" implies no body, we are thus expecting
2153 * no content. XXX: incomplete "list" of methods?
2155 csp->expected_content_length = 0;
2156 content_length_known = TRUE;
2159 if (csp->http->status == 304)
2162 * Expect no body. XXX: incomplete "list" of status codes?
2164 csp->expected_content_length = 0;
2165 content_length_known = TRUE;
2168 return (content_length_known && ((0 == csp->expected_content_length)
2169 || (csp->expected_content_length <= content_length)));
2171 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2173 /*********************************************************************
2175 * Function : mark_server_socket_tainted
2177 * Description : Makes sure we don't reuse a server socket
2178 * (if we didn't read everything the server sent
2179 * us reusing the socket would lead to garbage).
2182 * 1 : csp = Current client state (buffers, headers, etc...)
2186 *********************************************************************/
2187 static void mark_server_socket_tainted(struct client_state *csp)
2189 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
2191 log_error(LOG_LEVEL_CONNECT, "Unsetting keep-alive flag.");
2192 csp->flags &= ~CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE;
2196 /*********************************************************************
2198 * Function : get_request_line
2200 * Description : Read the client request line.
2203 * 1 : csp = Current client state (buffers, headers, etc...)
2205 * Returns : Pointer to request line or NULL in case of errors.
2207 *********************************************************************/
2208 static char *get_request_line(struct client_state *csp)
2210 char buf[BUFFER_SIZE];
2211 char *request_line = NULL;
2214 memset(buf, 0, sizeof(buf));
2218 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
2220 log_error(LOG_LEVEL_ERROR,
2221 "Stopped waiting for the request line.");
2222 write_socket(csp->cfd, CONNECTION_TIMEOUT_RESPONSE,
2223 strlen(CONNECTION_TIMEOUT_RESPONSE));
2227 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2229 if (len <= 0) return NULL;
2232 * If there is no memory left for buffering the
2233 * request, there is nothing we can do but hang up
2235 if (add_to_iob(csp, buf, len))
2240 request_line = get_header(csp->iob);
2242 } while ((NULL != request_line) && ('\0' == *request_line));
2244 return request_line;
2249 /*********************************************************************
2251 * Function : receive_client_request
2253 * Description : Read the client's request (more precisely the
2254 * client headers) and answer it if necessary.
2256 * Note that since we're not using select() we could get
2257 * blocked here if a client connected, then didn't say
2261 * 1 : csp = Current client state (buffers, headers, etc...)
2263 * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
2265 *********************************************************************/
2266 static jb_err receive_client_request(struct client_state *csp)
2268 char buf[BUFFER_SIZE];
2271 struct http_request *http;
2275 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
2276 struct list header_list;
2277 struct list *headers = &header_list;
2281 memset(buf, 0, sizeof(buf));
2283 req = get_request_line(csp);
2286 return JB_ERR_PARSE;
2288 assert(*req != '\0');
2290 if (client_protocol_is_unsupported(csp, req))
2292 return JB_ERR_PARSE;
2295 #ifdef FEATURE_FORCE_LOAD
2297 * If this request contains the FORCE_PREFIX and blocks
2298 * aren't enforced, get rid of it and set the force flag.
2300 if (strstr(req, FORCE_PREFIX))
2302 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
2304 log_error(LOG_LEVEL_FORCE,
2305 "Ignored force prefix in request: \"%s\".", req);
2309 strclean(req, FORCE_PREFIX);
2310 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
2311 csp->flags |= CSP_FLAG_FORCED;
2314 #endif /* def FEATURE_FORCE_LOAD */
2316 err = parse_http_request(req, http, csp);
2318 if (JB_ERR_OK != err)
2320 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
2321 /* XXX: Use correct size */
2322 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2323 log_error(LOG_LEVEL_ERROR,
2324 "Couldn't parse request line received from %s: %s",
2325 csp->ip_addr_str, jb_err_to_string(err));
2327 free_http_request(http);
2328 return JB_ERR_PARSE;
2331 /* grab the rest of the client's headers */
2335 p = get_header(csp->iob);
2339 /* There are no additional headers to read. */
2346 * We didn't receive a complete header
2347 * line yet, get the rest of it.
2349 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
2351 log_error(LOG_LEVEL_ERROR,
2352 "Stopped grabbing the client headers.");
2353 return JB_ERR_PARSE;
2356 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2359 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
2360 destroy_list(headers);
2361 return JB_ERR_PARSE;
2364 if (add_to_iob(csp, buf, len))
2367 * If there is no memory left for buffering the
2368 * request, there is nothing we can do but hang up
2370 destroy_list(headers);
2371 return JB_ERR_MEMORY;
2377 * We were able to read a complete
2378 * header and can finaly enlist it.
2385 if (http->host == NULL)
2388 * If we still don't know the request destination,
2389 * the request is invalid or the client uses
2390 * Privoxy without its knowledge.
2392 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
2395 * Our attempts to get the request destination
2396 * elsewhere failed or Privoxy is configured
2397 * to only accept proxy requests.
2399 * An error response has already been send
2400 * and we're done here.
2402 return JB_ERR_PARSE;
2407 * Determine the actions for this URL
2409 #ifdef FEATURE_TOGGLE
2410 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
2412 /* Most compatible set of actions (i.e. none) */
2413 init_current_action(csp->action);
2416 #endif /* ndef FEATURE_TOGGLE */
2418 get_url_actions(csp, http);
2422 * Save a copy of the original request for logging
2424 http->ocmd = strdup(http->cmd);
2425 if (http->ocmd == NULL)
2427 log_error(LOG_LEVEL_FATAL,
2428 "Out of memory copying HTTP request line");
2430 enlist(csp->headers, http->cmd);
2432 /* Append the previously read headers */
2433 list_append_list_unique(csp->headers, headers);
2434 destroy_list(headers);
2441 /*********************************************************************
2443 * Function : parse_client_request
2445 * Description : Parses the client's request and decides what to do
2448 * Note that since we're not using select() we could get
2449 * blocked here if a client connected, then didn't say
2453 * 1 : csp = Current client state (buffers, headers, etc...)
2455 * Returns : JB_ERR_OK or JB_ERR_PARSE
2457 *********************************************************************/
2458 static jb_err parse_client_request(struct client_state *csp)
2460 struct http_request *http = csp->http;
2463 err = sed(csp, FILTER_CLIENT_HEADERS);
2464 if (JB_ERR_OK != err)
2466 /* XXX: Should be handled in sed(). */
2467 assert(err == JB_ERR_PARSE);
2468 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers.");
2470 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2472 /* Check request line for rewrites. */
2473 if ((NULL == csp->headers->first->str)
2474 || (strcmp(http->cmd, csp->headers->first->str) &&
2475 (JB_ERR_OK != change_request_destination(csp))))
2478 * A header filter broke the request line - bail out.
2480 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
2481 /* XXX: Use correct size */
2482 log_error(LOG_LEVEL_CLF,
2483 "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
2484 log_error(LOG_LEVEL_ERROR,
2485 "Invalid request line after applying header filters.");
2486 free_http_request(http);
2488 return JB_ERR_PARSE;
2496 /*********************************************************************
2500 * Description : Once a connection to the client has been accepted,
2501 * this function is called (via serve()) to handle the
2502 * main business of the communication. When this
2503 * function returns, the caller must close the client
2506 * FIXME: chat is nearly thousand lines long.
2510 * 1 : csp = Current client state (buffers, headers, etc...)
2512 * Returns : Nothing.
2514 *********************************************************************/
2515 static void chat(struct client_state *csp)
2517 char buf[BUFFER_SIZE];
2524 int ms_iis5_hack = 0;
2525 size_t byte_count = 0;
2526 int forwarded_connect_retries = 0;
2527 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
2528 const struct forward_spec *fwd;
2529 struct http_request *http;
2530 int len = 0; /* for buffer sizes (and negative error codes) */
2532 /* Function that does the content filtering for the current request */
2533 filter_function_ptr content_filter = NULL;
2535 /* Skeleton for HTTP response, if we should intercept the request */
2536 struct http_response *rsp;
2537 struct timeval timeout;
2539 memset(buf, 0, sizeof(buf));
2540 memset(&timeout, 0, sizeof(timeout));
2541 timeout.tv_sec = csp->config->socket_timeout;
2545 if (receive_client_request(csp) != JB_ERR_OK)
2549 if (parse_client_request(csp) != JB_ERR_OK)
2554 /* decide how to route the HTTP request */
2555 fwd = forward_url(csp, http);
2558 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
2559 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2563 * build the http request to send to the server
2564 * we have to do one of the following:
2566 * create = use the original HTTP request to create a new
2567 * HTTP request that has either the path component
2568 * without the http://domainspec (w/path) or the
2569 * full orininal URL (w/url)
2570 * Note that the path and/or the HTTP version may
2571 * have been altered by now.
2573 * connect = Open a socket to the host:port of the server
2574 * and short-circuit server and client socket.
2576 * pass = Pass the request unchanged if forwarding a CONNECT
2577 * request to a parent proxy. Note that we'll be sending
2578 * the CFAIL message ourselves if connecting to the parent
2579 * fails, but we won't send a CSUCCEED message if it works,
2580 * since that would result in a double message (ours and the
2581 * parent's). After sending the request to the parent, we simply
2584 * here's the matrix:
2587 * +--------+--------+
2589 * 0 | create | connect|
2591 * Forwarding +--------+--------+
2593 * 1 | create | pass |
2595 * +--------+--------+
2599 if (http->ssl && connect_port_is_forbidden(csp))
2601 const char *acceptable_connect_ports =
2602 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
2603 assert(NULL != acceptable_connect_ports);
2604 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
2605 "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
2606 csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
2607 csp->action->flags |= ACTION_BLOCK;
2613 freez(csp->headers->first->str);
2614 build_request_line(csp, fwd, &csp->headers->first->str);
2618 * We have a request. Check if one of the crunchers wants it.
2620 if (crunch_response_triggered(csp, crunchers_all))
2623 * Yes. The client got the crunch response
2624 * and we are done here after cleaning up.
2626 /* XXX: why list_remove_all()? */
2627 list_remove_all(csp->headers);
2632 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2634 if (fwd->forward_host)
2636 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2637 fwd->forward_host, fwd->forward_port, http->hostport);
2641 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2644 /* here we connect to the server, gateway, or the forwarder */
2646 while ((csp->sfd = forwarded_connect(fwd, http, csp))
2647 && (errno == EINVAL)
2648 && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2650 log_error(LOG_LEVEL_ERROR,
2651 "failed request #%u to connect to %s. Trying again.",
2652 forwarded_connect_retries, http->hostport);
2655 if (csp->sfd == JB_INVALID_SOCKET)
2657 if (fwd->type != SOCKS_NONE)
2660 rsp = error_response(csp, "forwarding-failed", errno);
2662 else if (errno == EINVAL)
2664 rsp = error_response(csp, "no-such-domain", errno);
2668 rsp = error_response(csp, "connect-failed", errno);
2669 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2673 /* Write the answer to the client */
2676 send_crunch_response(csp, rsp);
2682 hdr = list_to_text(csp->headers);
2685 /* FIXME Should handle error properly */
2686 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2688 list_remove_all(csp->headers);
2690 if (fwd->forward_host || (http->ssl == 0))
2693 * Write the client's (modified) header to the server
2694 * (along with anything else that may be in the buffer)
2696 if (write_socket(csp->sfd, hdr, strlen(hdr))
2697 || (flush_socket(csp->sfd, csp->iob) < 0))
2699 log_error(LOG_LEVEL_CONNECT,
2700 "write header to: %s failed: %E", http->hostport);
2702 rsp = error_response(csp, "connect-failed", errno);
2705 send_crunch_response(csp, rsp);
2715 * We're running an SSL tunnel and we're not forwarding,
2716 * so just send the "connect succeeded" message to the
2717 * client, flush the rest, and get out of the way.
2719 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
2727 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2729 /* we're finished with the client's header */
2732 maxfd = (csp->cfd > csp->sfd) ? csp->cfd : csp->sfd;
2734 /* pass data between the client and server
2735 * until one or the other shuts down the connection.
2744 * FD_ZERO here seems to point to an errant macro which crashes.
2745 * So do this by hand for now...
2747 memset(&rfds,0x00,sizeof(fd_set));
2751 FD_SET(csp->cfd, &rfds);
2752 FD_SET(csp->sfd, &rfds);
2754 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2755 if ((csp->flags & CSP_FLAG_CHUNKED)
2756 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
2757 && ((csp->iob->eod - csp->iob->cur) >= 5)
2758 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
2760 log_error(LOG_LEVEL_CONNECT,
2761 "Looks like we read the last chunk together with "
2762 "the server headers. We better stop reading.");
2763 byte_count = (size_t)(csp->iob->eod - csp->iob->cur);
2764 csp->expected_content_length = byte_count;
2765 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2767 if (server_body && server_response_is_complete(csp, byte_count))
2769 log_error(LOG_LEVEL_CONNECT,
2770 "Done reading from server. Expected content length: %d. "
2771 "Actual content length: %d. Most recently received: %d.",
2772 csp->expected_content_length, byte_count, len);
2775 * XXX: should not jump around,
2776 * chat() is complicated enough already.
2780 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2782 n = select((int)maxfd+1, &rfds, NULL, NULL, &timeout);
2786 log_error(LOG_LEVEL_ERROR,
2787 "Didn't receive data in time: %s", http->url);
2788 if ((byte_count == 0) && (http->ssl == 0))
2790 write_socket(csp->cfd, CONNECTION_TIMEOUT_RESPONSE,
2791 strlen(CONNECTION_TIMEOUT_RESPONSE));
2793 mark_server_socket_tainted(csp);
2798 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2799 mark_server_socket_tainted(csp);
2804 * This is the body of the browser's request,
2805 * just read and write it.
2807 if (FD_ISSET(csp->cfd, &rfds))
2809 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2813 /* XXX: not sure if this is necessary. */
2814 mark_server_socket_tainted(csp);
2815 break; /* "game over, man" */
2818 if (write_socket(csp->sfd, buf, (size_t)len))
2820 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2821 mark_server_socket_tainted(csp);
2828 * The server wants to talk. It could be the header or the body.
2829 * If `hdr' is null, then it's the header otherwise it's the body.
2830 * FIXME: Does `hdr' really mean `host'? No.
2832 if (FD_ISSET(csp->sfd, &rfds))
2835 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2839 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2841 if (http->ssl && (fwd->forward_host == NULL))
2844 * Just hang up. We already confirmed the client's CONNECT
2845 * request with status code 200 and unencrypted content is
2846 * no longer welcome.
2848 log_error(LOG_LEVEL_ERROR,
2849 "CONNECT already confirmed. Unable to tell the client about the problem.");
2852 else if (byte_count)
2855 * Just hang up. We already transmitted the original headers
2856 * and parts of the original content and therefore missed the
2857 * chance to send an error message (without risking data corruption).
2859 * XXX: we could retry with a fancy range request here.
2861 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2862 "Unable to tell the client about the problem.");
2863 mark_server_socket_tainted(csp);
2867 rsp = error_response(csp, "connect-failed", errno);
2870 send_crunch_response(csp, rsp);
2876 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2877 if (csp->flags & CSP_FLAG_CHUNKED)
2879 if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2881 /* XXX: this is a temporary hack */
2882 log_error(LOG_LEVEL_CONNECT,
2883 "Looks like we reached the end of the last chunk. "
2884 "We better stop reading.");
2885 csp->expected_content_length = byte_count + (size_t)len;
2886 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2890 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2893 * Add a trailing zero to let be able to use string operations.
2894 * XXX: do we still need this with filter_popups gone?
2899 * Normally, this would indicate that we've read
2900 * as much as the server has sent us and we can
2901 * close the client connection. However, Microsoft
2902 * in its wisdom has released IIS/5 with a bug that
2903 * prevents it from sending the trailing \r\n in
2904 * a 302 redirect header (and possibly other headers).
2905 * To work around this if we've haven't parsed
2906 * a full header we'll append a trailing \r\n
2907 * and see if this now generates a valid one.
2909 * This hack shouldn't have any impacts. If we've
2910 * already transmitted the header or if this is a
2911 * SSL connection, then we won't bother with this
2912 * hack. So we only work on partially received
2913 * headers. If we append a \r\n and this still
2914 * doesn't generate a valid header, then we won't
2915 * transmit anything to the client.
2920 if (server_body || http->ssl)
2923 * If we have been buffering up the document,
2924 * now is the time to apply content modification
2925 * and send the result to the client.
2929 p = execute_content_filter(csp, content_filter);
2931 * If the content filter fails, use the original
2932 * buffer and length.
2933 * (see p != NULL ? p : csp->iob->cur below)
2937 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2940 if (JB_ERR_OK != update_server_headers(csp))
2942 log_error(LOG_LEVEL_FATAL,
2943 "Failed to update server headers. after filtering.");
2946 hdr = list_to_text(csp->headers);
2949 /* FIXME Should handle error properly */
2950 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2953 if (write_socket(csp->cfd, hdr, strlen(hdr))
2954 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
2956 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2959 mark_server_socket_tainted(csp);
2967 break; /* "game over, man" */
2971 * This is NOT the body, so
2972 * Let's pretend the server just sent us a blank line.
2974 snprintf(buf, sizeof(buf), "\r\n");
2975 len = (int)strlen(buf);
2978 * Now, let the normal header parsing algorithm below do its
2979 * job. If it fails, we'll exit instead of continuing.
2986 * If this is an SSL connection or we're in the body
2987 * of the server document, just write it to the client,
2988 * unless we need to buffer the body for later content-filtering
2990 if (server_body || http->ssl)
2995 * If there is no memory left for buffering the content, or the buffer limit
2996 * has been reached, switch to non-filtering mode, i.e. make & write the
2997 * header, flush the iob and buf, and get out of the way.
2999 if (add_to_iob(csp, buf, len))
3004 log_error(LOG_LEVEL_INFO,
3005 "Flushing header and buffers. Stepping back from filtering.");
3007 hdr = list_to_text(csp->headers);
3011 * Memory is too tight to even generate the header.
3012 * Send our static "Out-of-memory" page.
3014 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
3015 rsp = cgi_error_memory();
3016 send_crunch_response(csp, rsp);
3017 mark_server_socket_tainted(csp);
3020 hdrlen = strlen(hdr);
3022 if (write_socket(csp->cfd, hdr, hdrlen)
3023 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
3024 || (write_socket(csp->cfd, buf, (size_t)len)))
3026 log_error(LOG_LEVEL_CONNECT,
3027 "Flush header and buffers to client failed: %E");
3029 mark_server_socket_tainted(csp);
3034 * Reset the byte_count to the amount of bytes
3035 * we just flushed. len will be added a few lines below,
3036 * hdrlen doesn't matter for LOG_LEVEL_CLF.
3038 byte_count = (size_t)flushed;
3040 content_filter = NULL;
3046 if (write_socket(csp->cfd, buf, (size_t)len))
3048 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
3049 mark_server_socket_tainted(csp);
3053 byte_count += (size_t)len;
3058 const char *header_start;
3060 * We're still looking for the end of the server's header.
3061 * Buffer up the data we just read. If that fails, there's
3062 * little we can do but send our static out-of-memory page.
3064 if (add_to_iob(csp, buf, len))
3066 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
3067 rsp = cgi_error_memory();
3068 send_crunch_response(csp, rsp);
3069 mark_server_socket_tainted(csp);
3073 header_start = csp->iob->cur;
3075 /* Convert iob into something sed() can digest */
3076 if (JB_ERR_PARSE == get_server_headers(csp))
3081 * Well, we tried our MS IIS/5 hack and it didn't work.
3082 * The header is incomplete and there isn't anything
3083 * we can do about it.
3085 log_error(LOG_LEVEL_INFO,
3086 "MS IIS5 hack didn't produce valid headers.");
3092 * Since we have to wait for more from the server before
3093 * we can parse the headers we just continue here.
3095 int header_offset = csp->iob->cur - header_start;
3096 assert(csp->iob->cur >= header_start);
3097 byte_count += (size_t)(len - header_offset);
3098 log_error(LOG_LEVEL_CONNECT, "Continuing buffering headers. "
3099 "byte_count: %d. header_offset: %d. len: %d.",
3100 byte_count, header_offset, len);
3105 /* Did we actually get anything? */
3106 if (NULL == csp->headers->first)
3108 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
3109 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3110 write_socket(csp->cfd, NO_SERVER_DATA_RESPONSE, strlen(NO_SERVER_DATA_RESPONSE));
3111 free_http_request(http);
3112 mark_server_socket_tainted(csp);
3116 assert(csp->headers->first->str);
3118 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
3119 strncmpic(csp->headers->first->str, "ICY", 3))
3122 * It doesn't look like a HTTP (or Shoutcast) response:
3123 * tell the client and log the problem.
3125 if (strlen(csp->headers->first->str) > 30)
3127 csp->headers->first->str[30] = '\0';
3129 log_error(LOG_LEVEL_ERROR,
3130 "Invalid server or forwarder response. Starts with: %s",
3131 csp->headers->first->str);
3132 log_error(LOG_LEVEL_CLF,
3133 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3134 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
3135 strlen(INVALID_SERVER_HEADERS_RESPONSE));
3136 free_http_request(http);
3137 mark_server_socket_tainted(csp);
3142 * We have now received the entire server header,
3143 * filter it and send the result to the client
3145 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
3147 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
3149 hdr = list_to_text(csp->headers);
3152 /* FIXME Should handle error properly */
3153 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3156 if (crunch_response_triggered(csp, crunchers_light))
3159 * One of the tags created by a server-header
3160 * tagger triggered a crunch. We already
3161 * delivered the crunch response to the client
3162 * and are done here after cleaning up.
3165 mark_server_socket_tainted(csp);
3168 /* Buffer and pcrs filter this if appropriate. */
3170 if (!http->ssl) /* We talk plaintext */
3172 content_filter = get_filter_function(csp);
3175 * Only write if we're not buffering for content modification
3177 if (!content_filter)
3180 * Write the server's (modified) header to
3181 * the client (along with anything else that
3182 * may be in the buffer)
3185 if (write_socket(csp->cfd, hdr, strlen(hdr))
3186 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
3188 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
3191 * The write failed, so don't bother mentioning it
3192 * to the client... it probably can't hear us anyway.
3195 mark_server_socket_tainted(csp);
3199 byte_count += (size_t)len;
3204 * XXX: the header lenght should probably
3205 * be calculated by get_server_headers().
3207 int header_length = csp->iob->cur - header_start;
3208 assert(csp->iob->cur > header_start);
3209 byte_count += (size_t)(len - header_length);
3212 /* we're finished with the server's header */
3218 * If this was a MS IIS/5 hack then it means the server
3219 * has already closed the connection. Nothing more to read.
3224 log_error(LOG_LEVEL_INFO,
3225 "Closed server connection detected with MS IIS5 hack enabled.");
3231 mark_server_socket_tainted(csp);
3232 return; /* huh? we should never get here */
3235 if (csp->content_length == 0)
3238 * If Privoxy didn't recalculate the Content-Lenght,
3239 * byte_count is still correct.
3241 csp->content_length = byte_count;
3244 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3245 && (csp->expected_content_length != byte_count))
3247 log_error(LOG_LEVEL_CONNECT,
3248 "Received %d bytes while expecting %d.",
3249 byte_count, csp->expected_content_length);
3250 mark_server_socket_tainted(csp);
3253 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
3254 csp->ip_addr_str, http->ocmd, csp->content_length);
3258 /*********************************************************************
3260 * Function : wait_for_alive_connections
3262 * Description : Waits for alive connections to timeout.
3268 *********************************************************************/
3269 static void wait_for_alive_connections()
3271 int connections_alive = close_unusable_connections();
3273 while (0 < connections_alive)
3275 log_error(LOG_LEVEL_CONNECT,
3276 "Waiting for %d connections to timeout.",
3279 connections_alive = close_unusable_connections();
3282 log_error(LOG_LEVEL_CONNECT, "No connections to wait for left.");
3286 /*********************************************************************
3290 * Description : This is little more than chat. We only "serve" to
3291 * to close any socket that chat may have opened.
3294 * 1 : csp = Current client state (buffers, headers, etc...)
3298 *********************************************************************/
3300 void serve(struct client_state *csp)
3301 #else /* ifndef AMIGA */
3302 static void serve(struct client_state *csp)
3303 #endif /* def AMIGA */
3306 close_socket(csp->cfd);
3308 if (csp->sfd != JB_INVALID_SOCKET)
3310 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3311 static int monitor_thread_running = 0;
3313 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
3314 && (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
3316 remember_connection(csp->sfd, csp->http, forward_url(csp, csp->http));
3317 privoxy_mutex_lock(&connection_reuse_mutex);
3318 if (!monitor_thread_running)
3320 monitor_thread_running = 1;
3321 privoxy_mutex_unlock(&connection_reuse_mutex);
3322 wait_for_alive_connections();
3323 privoxy_mutex_lock(&connection_reuse_mutex);
3324 monitor_thread_running = 0;
3326 privoxy_mutex_unlock(&connection_reuse_mutex);
3330 forget_connection(csp->sfd);
3331 close_socket(csp->sfd);
3334 close_socket(csp->sfd);
3335 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3338 csp->flags &= ~CSP_FLAG_ACTIVE;
3344 /*********************************************************************
3346 * Function : server_thread
3348 * Description : We only exist to call `serve' in a threaded environment.
3351 * 1 : data = Current client state (buffers, headers, etc...)
3353 * Returns : Always 0.
3355 *********************************************************************/
3356 static int32 server_thread(void *data)
3358 serve((struct client_state *) data);
3365 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3366 /*********************************************************************
3370 * Description : Print usage info & exit.
3372 * Parameters : Pointer to argv[0] for identifying ourselves
3376 *********************************************************************/
3377 static void usage(const char *myname)
3379 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
3383 #endif /* defined(unix) */
3386 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
3387 #endif /* defined(unix) */
3388 "[--version] [configfile]\n"
3389 "Aborting\n", myname);
3394 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
3397 #ifdef MUTEX_LOCKS_AVAILABLE
3398 /*********************************************************************
3400 * Function : privoxy_mutex_lock
3402 * Description : Locks a mutex.
3405 * 1 : mutex = The mutex to lock.
3407 * Returns : Void. May exit in case of errors.
3409 *********************************************************************/
3410 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
3412 #ifdef FEATURE_PTHREAD
3413 int err = pthread_mutex_lock(mutex);
3416 if (mutex != &log_mutex)
3418 log_error(LOG_LEVEL_FATAL,
3419 "Mutex locking failed: %s.\n", strerror(err));
3424 EnterCriticalSection(mutex);
3425 #endif /* def FEATURE_PTHREAD */
3429 /*********************************************************************
3431 * Function : privoxy_mutex_unlock
3433 * Description : Unlocks a mutex.
3436 * 1 : mutex = The mutex to unlock.
3438 * Returns : Void. May exit in case of errors.
3440 *********************************************************************/
3441 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
3443 #ifdef FEATURE_PTHREAD
3444 int err = pthread_mutex_unlock(mutex);
3447 if (mutex != &log_mutex)
3449 log_error(LOG_LEVEL_FATAL,
3450 "Mutex unlocking failed: %s.\n", strerror(err));
3455 LeaveCriticalSection(mutex);
3456 #endif /* def FEATURE_PTHREAD */
3460 /*********************************************************************
3462 * Function : privoxy_mutex_init
3464 * Description : Prepares a mutex.
3467 * 1 : mutex = The mutex to initialize.
3469 * Returns : Void. May exit in case of errors.
3471 *********************************************************************/
3472 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
3474 #ifdef FEATURE_PTHREAD
3475 int err = pthread_mutex_init(mutex, 0);
3478 printf("Fatal error. Mutex initialization failed: %s.\n",
3483 InitializeCriticalSection(mutex);
3484 #endif /* def FEATURE_PTHREAD */
3486 #endif /* def MUTEX_LOCKS_AVAILABLE */
3488 /*********************************************************************
3490 * Function : initialize_mutexes
3492 * Description : Prepares mutexes if mutex support is available.
3496 * Returns : Void, exits in case of errors.
3498 *********************************************************************/
3499 static void initialize_mutexes(void)
3501 #ifdef MUTEX_LOCKS_AVAILABLE
3503 * Prepare global mutex semaphores
3505 privoxy_mutex_init(&log_mutex);
3506 privoxy_mutex_init(&log_init_mutex);
3507 privoxy_mutex_init(&connection_reuse_mutex);
3510 * XXX: The assumptions below are a bit naive
3511 * and can cause locks that aren't necessary.
3513 * For example older FreeBSD versions (< 6.x?)
3514 * have no gethostbyname_r, but gethostbyname is
3517 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
3518 privoxy_mutex_init(&resolver_mutex);
3519 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
3521 * XXX: should we use a single mutex for
3522 * localtime() and gmtime() as well?
3524 #ifndef HAVE_GMTIME_R
3525 privoxy_mutex_init(&gmtime_mutex);
3526 #endif /* ndef HAVE_GMTIME_R */
3528 #ifndef HAVE_LOCALTIME_R
3529 privoxy_mutex_init(&localtime_mutex);
3530 #endif /* ndef HAVE_GMTIME_R */
3533 privoxy_mutex_init(&rand_mutex);
3534 #endif /* ndef HAVE_RANDOM */
3535 #endif /* def MUTEX_LOCKS_AVAILABLE */
3539 /*********************************************************************
3543 * Description : Load the config file and start the listen loop.
3544 * This function is a lot more *sane* with the `load_config'
3545 * and `listen_loop' functions; although it stills does
3546 * a *little* too much for my taste.
3549 * 1 : argc = Number of parameters (including $0).
3550 * 2 : argv = Array of (char *)'s to the parameters.
3552 * Returns : 1 if : can't open config file, unrecognized directive,
3553 * stats requested in multi-thread mode, can't open the
3554 * log file, can't open the jar file, listen port is invalid,
3555 * any load fails, and can't bind port.
3557 * Else main never returns, the process must be signaled
3558 * to terminate execution. Or, on Windows, use the
3559 * "File", "Exit" menu option.
3561 *********************************************************************/
3563 int real_main(int argc, const char *argv[])
3565 int main(int argc, const char *argv[])
3569 unsigned int random_seed;
3571 struct passwd *pw = NULL;
3572 struct group *grp = NULL;
3575 char *pre_chroot_nslookup_to_load_resolver = NULL;
3582 #if !defined(_WIN32)
3589 /* Prepare mutexes if supported and necessary. */
3590 initialize_mutexes();
3592 /* Enable logging until further notice. */
3596 * Parse the command line arguments
3598 * XXX: simply printing usage information in case of
3599 * invalid arguments isn't particularly user friendly.
3601 while (++argc_pos < argc)
3604 /* Check to see if the service must be installed or uninstalled */
3605 if (strncmp(argv[argc_pos], "--install", 9) == 0)
3607 const char *pName = argv[argc_pos] + 9;
3610 exit( (install_service(pName)) ? 0 : 1 );
3612 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
3614 const char *pName = argv[argc_pos] + 11;
3617 exit((uninstall_service(pName)) ? 0 : 1);
3619 else if (strcmp(argv[argc_pos], "--service" ) == 0)
3621 bRunAsService = TRUE;
3622 w32_set_service_cwd();
3623 atexit(w32_service_exit_notify);
3626 #endif /* defined(_WIN32) */
3629 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3631 if (strcmp(argv[argc_pos], "--help") == 0)
3636 else if(strcmp(argv[argc_pos], "--version") == 0)
3638 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
3644 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
3649 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
3651 if (++argc_pos == argc) usage(argv[0]);
3652 pidfile = strdup(argv[argc_pos]);
3655 else if (strcmp(argv[argc_pos], "--user" ) == 0)
3657 if (++argc_pos == argc) usage(argv[argc_pos]);
3659 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
3662 if (NULL == (grp = getgrnam(p)))
3664 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
3668 if (NULL == (pw = getpwnam(argv[argc_pos])))
3670 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
3673 if (p != NULL) *--p = '\0';
3676 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
3678 if (++argc_pos == argc) usage(argv[0]);
3679 pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
3682 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
3686 #endif /* defined(unix) */
3688 else if (argc_pos + 1 != argc)
3691 * This is neither the last command line
3692 * option, nor was it recognized before,
3693 * therefore it must be invalid.
3699 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3701 configfile = argv[argc_pos];
3704 } /* -END- while (more arguments) */
3706 show_version(Argv[0]);
3709 if ( *configfile != '/' )
3711 char cwd[BUFFER_SIZE];
3713 size_t abs_file_size;
3715 /* make config-filename absolute here */
3716 if (NULL == getcwd(cwd, sizeof(cwd)))
3718 perror("failed to get current working directory");
3723 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3724 basedir = strdup(cwd);
3726 if (NULL == basedir ||
3727 NULL == (abs_file = malloc(abs_file_size)))
3729 perror("malloc failed");
3732 strlcpy(abs_file, basedir, abs_file_size);
3733 strlcat(abs_file, "/", abs_file_size );
3734 strlcat(abs_file, configfile, abs_file_size);
3735 configfile = abs_file;
3737 #endif /* defined unix */
3741 clients->next = NULL;
3743 /* XXX: factor out initialising after the next stable release. */
3746 #elif defined(_WIN32)
3750 random_seed = (unsigned int)time(NULL);
3752 srandom(random_seed);
3755 #endif /* ifdef HAVE_RANDOM */
3758 * Unix signal handling
3760 * Catch the abort, interrupt and terminate signals for a graceful exit
3761 * Catch the hangup signal so the errlog can be reopened.
3762 * Ignore the broken pipe signals (FIXME: Why?)
3764 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3767 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3768 const int ignored_signals[] = { SIGPIPE, 0 };
3770 for (idx = 0; catched_signals[idx] != 0; idx++)
3772 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3773 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3775 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3776 #endif /* ifdef sun */
3778 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3782 for (idx = 0; ignored_signals[idx] != 0; idx++)
3784 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3786 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3791 #else /* ifdef _WIN32 */
3792 # ifdef _WIN_CONSOLE
3794 * We *are* in a windows console app.
3795 * Print a verbose messages about FAQ's and such
3797 printf("%s", win32_blurb);
3798 # endif /* def _WIN_CONSOLE */
3799 #endif /* def _WIN32 */
3802 /* Initialize the CGI subsystem */
3803 cgi_init_error_messages();
3806 * If runnig on unix and without the --nodaemon
3807 * option, become a daemon. I.e. fork, detach
3808 * from tty and get process group leadership
3821 if ( pid < 0 ) /* error */
3826 else if ( pid != 0 ) /* parent */
3831 * must check for errors
3832 * child died due to missing files aso
3835 wpid = waitpid( pid, &status, WNOHANG );
3844 /* Should be more portable, but not as well tested */
3849 #else /* ndef __FreeBSD__ */
3851 #endif /* ndef __FreeBSD__ */
3852 fd = open("/dev/tty", O_RDONLY);
3855 /* no error check here */
3856 ioctl( fd, TIOCNOTTY,0 );
3861 * stderr (fd 2) will be closed later on, when the
3862 * log file has been parsed.
3869 } /* -END- if (!no_daemon) */
3872 * As soon as we have written the PID file, we can switch
3873 * to the user and group ID indicated by the --user option
3879 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3881 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3885 if (setgroups(1, &grp->gr_gid))
3887 log_error(LOG_LEVEL_FATAL, "setgroups() failed: %E");
3890 else if (initgroups(pw->pw_name, pw->pw_gid))
3892 log_error(LOG_LEVEL_FATAL, "initgroups() failed: %E");
3898 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3900 /* Read the time zone file from /etc before doing chroot. */
3902 if (NULL != pre_chroot_nslookup_to_load_resolver
3903 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3905 /* Initialize resolver library. */
3906 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3908 if (chroot(pw->pw_dir) < 0)
3910 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3914 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3917 if (setuid(pw->pw_uid))
3919 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3923 char putenv_dummy[64];
3925 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3926 if (putenv(putenv_dummy) != 0)
3928 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3931 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3932 if (putenv(putenv_dummy) != 0)
3934 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3940 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3943 #endif /* defined unix */
3946 /* This will be FALSE unless the command line specified --service
3950 /* Yup, so now we must attempt to establish a connection
3951 * with the service dispatcher. This will only work if this
3952 * process was launched by the service control manager to
3953 * actually run as a service. If this isn't the case, i've
3954 * known it take around 30 seconds or so for the call to return.
3957 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3958 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3960 /* Service has run, and at this point is now being stopped, so just return */
3965 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3967 /* An error occurred. Usually it's because --service was wrongly specified
3968 * and we were unable to connect to the Service Control Dispatcher because
3969 * it wasn't expecting us and is therefore not listening.
3971 * For now, just continue below to call the listen_loop function.
3974 #endif /* def _WIN32 */
3984 /*********************************************************************
3986 * Function : bind_port_helper
3988 * Description : Bind the listen port. Handles logging, and aborts
3992 * 1 : config = Privoxy configuration. Specifies port
3995 * Returns : Port that was opened.
3997 *********************************************************************/
3998 static jb_socket bind_port_helper(struct configuration_spec * config)
4003 if (config->haddr == NULL)
4005 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
4010 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
4011 config->hport, config->haddr);
4014 result = bind_port(config->haddr, config->hport, &bfd);
4021 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
4022 "There may be another Privoxy or some other "
4023 "proxy running on port %d",
4024 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
4025 config->hport, config->hport);
4028 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
4029 "The hostname is not resolvable",
4030 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
4033 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
4034 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
4037 /* shouldn't get here */
4038 return JB_INVALID_SOCKET;
4041 config->need_bind = 0;
4048 /* Without this simple workaround we get this compiler warning from _beginthread
4049 * warning C4028: formal parameter 1 different from declaration
4051 void w32_service_listen_loop(void *p)
4055 #endif /* def _WIN32 */
4058 /*********************************************************************
4060 * Function : listen_loop
4062 * Description : bind the listen port and enter a "FOREVER" listening loop.
4068 *********************************************************************/
4069 static void listen_loop(void)
4071 struct client_state *csp = NULL;
4073 struct configuration_spec * config;
4075 config = load_config();
4077 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4079 * XXX: Should be relocated once it no
4080 * longer needs to emit log messages.
4082 initialize_reusable_connections();
4083 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4085 bfd = bind_port_helper(config);
4087 #ifdef FEATURE_GRACEFUL_TERMINATION
4088 while (!g_terminate)
4093 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
4094 while (waitpid(-1, NULL, WNOHANG) > 0)
4096 /* zombie children */
4098 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
4101 * Free data that was used by died threads
4107 * Re-open the errlog after HUP signal
4109 if (received_hup_signal)
4111 if (NULL != config->logfile)
4113 init_error_log(Argv[0], config->logfile);
4115 received_hup_signal = 0;
4119 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
4121 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
4125 csp->flags |= CSP_FLAG_ACTIVE;
4126 csp->sfd = JB_INVALID_SOCKET;
4128 csp->config = config = load_config();
4130 if ( config->need_bind )
4133 * Since we were listening to the "old port", we will not see
4134 * a "listen" param change until the next IJB request. So, at
4135 * least 1 more request must be made for us to find the new
4136 * setting. I am simply closing the old socket and binding the
4139 * Which-ever is correct, we will serve 1 more page via the
4140 * old settings. This should probably be a "show-proxy-args"
4141 * request. This should not be a so common of an operation
4142 * that this will hurt people's feelings.
4147 bfd = bind_port_helper(config);
4150 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
4152 if (!accept_connection(csp, bfd))
4154 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
4167 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
4170 #ifdef FEATURE_TOGGLE
4171 if (global_toggle_state)
4172 #endif /* def FEATURE_TOGGLE */
4174 csp->flags |= CSP_FLAG_TOGGLED_ON;
4177 if (run_loader(csp))
4179 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
4180 /* Never get here - LOG_LEVEL_FATAL causes program exit */
4184 if (block_acl(NULL,csp))
4186 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
4187 close_socket(csp->cfd);
4191 #endif /* def FEATURE_ACL */
4193 /* add it to the list of clients */
4194 csp->next = clients->next;
4195 clients->next = csp;
4197 if (config->multi_threaded)
4201 /* this is a switch () statment in the C preprocessor - ugh */
4202 #undef SELECTED_ONE_OPTION
4204 /* Use Pthreads in preference to native code */
4205 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
4206 #define SELECTED_ONE_OPTION
4208 pthread_t the_thread;
4209 pthread_attr_t attrs;
4211 pthread_attr_init(&attrs);
4212 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
4213 errno = pthread_create(&the_thread, &attrs,
4214 (void * (*)(void *))serve, csp);
4215 child_id = errno ? -1 : 0;
4216 pthread_attr_destroy(&attrs);
4220 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
4221 #define SELECTED_ONE_OPTION
4222 child_id = _beginthread(
4223 (void (*)(void *))serve,
4228 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
4229 #define SELECTED_ONE_OPTION
4230 child_id = _beginthread(
4231 (void(* _Optlink)(void*))serve,
4237 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
4238 #define SELECTED_ONE_OPTION
4240 thread_id tid = spawn_thread
4241 (server_thread, "server", B_NORMAL_PRIORITY, csp);
4243 if ((tid >= 0) && (resume_thread(tid) == B_OK))
4245 child_id = (int) tid;
4254 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
4255 #define SELECTED_ONE_OPTION
4256 csp->cfd = ReleaseSocket(csp->cfd, -1);
4259 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4260 NP_Output, Output(),
4261 NP_CloseOutput, FALSE,
4262 NP_Name, (ULONG)"privoxy child",
4266 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4267 NP_Output, Output(),
4268 NP_CloseOutput, FALSE,
4269 NP_Name, (ULONG)"privoxy child",
4270 NP_StackSize, 200*1024,
4276 ((struct Task *)child_id)->tc_UserData = csp;
4277 Signal((struct Task *)child_id, SIGF_SINGLE);
4282 #if !defined(SELECTED_ONE_OPTION)
4285 /* This block is only needed when using fork().
4286 * When using threads, the server thread was
4287 * created and run by the call to _beginthread().
4289 if (child_id == 0) /* child */
4292 #ifdef FEATURE_TOGGLE
4293 int inherited_toggle_state = global_toggle_state;
4294 #endif /* def FEATURE_TOGGLE */
4299 * If we've been toggled or we've blocked the request, tell Mom
4302 #ifdef FEATURE_TOGGLE
4303 if (inherited_toggle_state != global_toggle_state)
4305 rc |= RC_FLAG_TOGGLED;
4307 #endif /* def FEATURE_TOGGLE */
4309 #ifdef FEATURE_STATISTICS
4310 if (csp->flags & CSP_FLAG_REJECTED)
4312 rc |= RC_FLAG_BLOCKED;
4314 #endif /* ndef FEATURE_STATISTICS */
4318 else if (child_id > 0) /* parent */
4320 /* in a fork()'d environment, the parent's
4321 * copy of the client socket and the CSP
4325 #if !defined(_WIN32) && !defined(__CYGWIN__)
4327 wait( &child_status );
4330 * Evaluate child's return code: If the child has
4331 * - been toggled, toggle ourselves
4332 * - blocked its request, bump up the stats counter
4335 #ifdef FEATURE_TOGGLE
4336 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
4338 global_toggle_state = !global_toggle_state;
4340 #endif /* def FEATURE_TOGGLE */
4342 #ifdef FEATURE_STATISTICS
4344 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
4348 #endif /* def FEATURE_STATISTICS */
4350 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
4351 close_socket(csp->cfd);
4352 csp->flags &= ~CSP_FLAG_ACTIVE;
4356 #undef SELECTED_ONE_OPTION
4357 /* end of cpp switch () */
4359 if (child_id < 0) /* failed */
4361 char buf[BUFFER_SIZE];
4363 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
4365 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
4367 write_socket(csp->cfd, buf, strlen(buf));
4368 close_socket(csp->cfd);
4369 csp->flags &= ~CSP_FLAG_ACTIVE;
4380 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
4382 /* Clean up. Aim: free all memory (no leaks) */
4383 #ifdef FEATURE_GRACEFUL_TERMINATION
4385 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
4387 unload_current_config_file();
4388 unload_current_actions_file();
4389 unload_current_re_filterfile();
4390 #ifdef FEATURE_TRUST
4391 unload_current_trust_file();
4394 if (config->multi_threaded)
4401 } while ((clients->next != NULL) && (--i > 0));
4405 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
4416 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
4417 /* Cleanup - remove taskbar icon etc. */
4422 #endif /* FEATURE_GRACEFUL_TERMINATION */