1 const char jcc_rcs[] = "$Id: jcc.c,v 1.226 2009/03/01 18:28:24 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 1.226 2009/03/01 18:28:24 fabiankeil
37 * Help clang understand that we aren't dereferencing
40 * Revision 1.225 2009/02/19 18:09:32 fabiankeil
41 * Unbreak build without FEATURE_CONNECTION_KEEP_ALIVE.
44 * Revision 1.224 2009/02/14 15:32:04 fabiankeil
45 * Add the request URL to the timeout message in chat().
48 * Revision 1.223 2009/02/09 21:21:16 fabiankeil
49 * Now that init_log_module() is called earlier, call show_version()
50 * later on from main() directly so it doesn't get called for --help
53 * Revision 1.222 2009/02/08 12:56:51 fabiankeil
54 * Call initialize_mutexes() before init_log_module() again.
55 * Broken since r220, might be the cause of Lee's #2579448.
57 * Revision 1.221 2009/02/06 18:02:58 fabiankeil
58 * When dropping privileges, also give up membership in supplementary
59 * groups. Thanks to Matthias Drochner for reporting the problem,
60 * providing the initial patch and testing the final version.
62 * Revision 1.220 2009/02/04 18:29:07 fabiankeil
63 * Initialize the log module before parsing arguments.
64 * Thanks to Matthias Drochner for the report.
66 * Revision 1.219 2009/01/31 16:08:21 fabiankeil
67 * Remove redundant error check in receive_client_request().
69 * Revision 1.218 2009/01/31 12:25:54 fabiankeil
70 * Flatten indentation in receive_client_request().
72 * Revision 1.217 2009/01/07 19:50:09 fabiankeil
73 * - If the socket-timeout has been reached and the client
74 * hasn't received any data yet, send an explanation before
75 * closing the connection.
76 * - In get_request_line(), signal timeouts the right way.
78 * Revision 1.216 2008/12/24 22:13:11 ler762
79 * fix GCC 3.4.4 warning
81 * Revision 1.215 2008/12/24 17:06:19 fabiankeil
82 * Keep a thread around to timeout alive connections
83 * even if no new requests are coming in.
85 * Revision 1.214 2008/12/20 14:53:55 fabiankeil
86 * Add config option socket-timeout to control the time
87 * Privoxy waits for data to arrive on a socket. Useful
88 * in case of stale ssh tunnels or when fuzz-testing.
90 * Revision 1.213 2008/12/15 18:45:51 fabiankeil
91 * When logging crunches, log the whole URL, so one can easily
92 * differentiate between vanilla HTTP and CONNECT requests.
94 * Revision 1.212 2008/12/14 15:46:22 fabiankeil
95 * Give crunched requests their own log level.
97 * Revision 1.211 2008/12/06 10:05:03 fabiankeil
98 * Downgrade "Received x bytes while expecting y." message to
99 * LOG_LEVEL_CONNECT as it doesn't necessarily indicate an error.
101 * Revision 1.210 2008/12/02 22:03:18 fabiankeil
102 * Don't miscalculate byte_count if we don't get all the
103 * server headers with one read_socket() call. With keep-alive
104 * support enabled, this caused delays until the server closed
107 * Revision 1.209 2008/11/27 09:44:04 fabiankeil
108 * Cosmetics for the last commit: Don't watch out for
109 * the last chunk if the content isn't chunk-encoded or
110 * if we already determined the content length previously.
112 * Revision 1.208 2008/11/26 18:24:17 fabiankeil
113 * Recognize that the server response is complete if the
114 * last chunk is read together with the server headers.
117 * Revision 1.207 2008/11/25 17:25:16 fabiankeil
118 * Don't convert the client-header list to text until we need to.
120 * Revision 1.206 2008/11/23 17:00:11 fabiankeil
121 * Some more chat() cosmetics.
123 * Revision 1.205 2008/11/16 12:43:49 fabiankeil
124 * Turn keep-alive support into a runtime feature
125 * that is disabled by setting keep-alive-timeout
126 * to a negative value.
128 * Revision 1.204 2008/11/06 19:42:17 fabiankeil
129 * Fix last-chunk detection hack to also apply
130 * if buf[] contains nothing but the last-chunk.
132 * Revision 1.203 2008/11/06 18:34:35 fabiankeil
133 * Factor receive_client_request() and
134 * parse_client_request() out of chat().
136 * Revision 1.202 2008/11/02 18:40:34 fabiankeil
137 * If we received a different amount of data than we expected,
138 * log a warning and make sure the server socket isn't reused.
140 * Revision 1.201 2008/11/02 16:48:20 fabiankeil
141 * Revert revision 1.195 and try again.
143 * Revision 1.200 2008/10/26 16:53:18 fabiankeil
146 * Revision 1.199 2008/10/26 15:36:10 fabiankeil
147 * Remove two debug messages with LOG_LEVEL_INFO.
149 * Revision 1.198 2008/10/22 15:19:55 fabiankeil
150 * Once More, With Feeling: if there is no logfile
151 * because the user didn't specify one, we shouldn't
152 * call init_error_log() after receiving SIGHUP either.
154 * Revision 1.197 2008/10/20 17:02:40 fabiankeil
155 * If SIGHUP is received while we aren't running in daemon
156 * mode, calling init_error_log() would be a mistake.
158 * Revision 1.196 2008/10/16 09:16:41 fabiankeil
159 * - Fix two gcc44 conversion warnings.
160 * - Don't bother logging the last five bytes
163 * Revision 1.195 2008/10/13 16:04:37 fabiankeil
164 * Make sure we don't try to reuse tainted server sockets.
166 * Revision 1.194 2008/10/12 18:35:18 fabiankeil
167 * The last commit was a bit too ambitious, apparently the content
168 * length adjustment is only necessary if we aren't buffering.
170 * Revision 1.193 2008/10/12 15:57:35 fabiankeil
171 * Fix content length calculation if we read headers
172 * and the start of the body at once. Now that we have
173 * FEATURE_CONNECTION_KEEP_ALIVE, it actually matters.
175 * Revision 1.192 2008/10/11 18:19:14 fabiankeil
176 * Even more chat() cosmetics.
178 * Revision 1.191 2008/10/11 18:00:14 fabiankeil
179 * Reformat some comments in chat().
181 * Revision 1.190 2008/10/11 14:58:00 fabiankeil
182 * In case of chunk-encoded content, stop reading if
183 * the buffer looks like it ends with the last chunk.
185 * Revision 1.189 2008/10/11 09:53:00 fabiankeil
186 * Let server_response_is_complete() deal properly with
187 * content that is neither buffered nor read all at once.
189 * Revision 1.188 2008/10/09 18:21:41 fabiankeil
190 * Flush work-in-progress changes to keep outgoing connections
191 * alive where possible. Incomplete and mostly #ifdef'd out.
193 * Revision 1.187 2008/09/07 12:35:05 fabiankeil
194 * Add mutex lock support for _WIN32.
196 * Revision 1.186 2008/09/04 08:13:58 fabiankeil
197 * Prepare for critical sections on Windows by adding a
198 * layer of indirection before the pthread mutex functions.
200 * Revision 1.185 2008/08/30 12:03:07 fabiankeil
201 * Remove FEATURE_COOKIE_JAR.
203 * Revision 1.184 2008/08/22 15:34:45 fabiankeil
204 * - Silence LLVM/Clang complaint.
205 * - Make received_hup_signal static.
206 * - Hide definitions for basedir, pidfile and received_hup_signal
207 * from __EMX__ as they only seem to be used in case of #ifdef unix.
209 * Revision 1.183 2008/08/21 07:09:35 fabiankeil
210 * Accept Shoutcast responses again. Problem reported
211 * and fix suggested by Stefan in #2062860.
213 * Revision 1.182 2008/06/27 11:13:56 fabiankeil
214 * Fix possible NULL-pointer dereference reported
215 * by din_a4 in #2003937. Pointy hat to me.
217 * Revision 1.181 2008/05/21 15:47:15 fabiankeil
218 * Streamline sed()'s prototype and declare
219 * the header parse and add structures static.
221 * Revision 1.180 2008/05/21 15:26:32 fabiankeil
222 * - Mark csp as immutable for send_crunch_response().
223 * - Fix comment spelling.
225 * Revision 1.179 2008/05/20 20:13:32 fabiankeil
226 * Factor update_server_headers() out of sed(), ditch the
227 * first_run hack and make server_patterns_light static.
229 * Revision 1.178 2008/05/10 13:23:38 fabiankeil
230 * Don't provide get_header() with the whole client state
231 * structure when it only needs access to csp->iob.
233 * Revision 1.177 2008/05/10 11:51:12 fabiankeil
234 * Make the "read the rest of the headers" loop a bit more readable.
236 * Revision 1.176 2008/05/10 11:37:57 fabiankeil
237 * - Instead of logging when the IIS5 hack is enabled, log when it fails.
238 * - Remove useless comment.
240 * Revision 1.175 2008/05/09 18:53:59 fabiankeil
241 * Fix comment grammar.
243 * Revision 1.174 2008/05/07 18:05:53 fabiankeil
244 * Remove the pointless buffer in client_protocol_is_unsupported().
246 * Revision 1.173 2008/05/06 15:09:00 fabiankeil
247 * Least-effort fix for bug #1821930 (reported by Lee):
248 * If the response doesn't look like HTTP,
249 * tell the client and log the problem.
251 * Revision 1.172 2008/04/16 16:38:21 fabiankeil
252 * Don't pass the whole csp structure to flush_socket()
253 * when it only needs a file descriptor and a buffer.
255 * Revision 1.171 2008/03/27 18:27:25 fabiankeil
256 * Remove kill-popups action.
258 * Revision 1.170 2008/03/06 16:33:46 fabiankeil
259 * If limit-connect isn't used, don't limit CONNECT requests to port 443.
261 * Revision 1.169 2008/03/04 18:30:39 fabiankeil
262 * Remove the treat-forbidden-connects-like-blocks action. We now
263 * use the "blocked" page for forbidden CONNECT requests by default.
265 * Revision 1.168 2008/03/02 12:25:25 fabiankeil
266 * Also use shiny new connect_port_is_forbidden() in jcc.c.
268 * Revision 1.167 2008/02/23 16:57:12 fabiankeil
269 * Rename url_actions() to get_url_actions() and let it
270 * use the standard parameter ordering.
272 * Revision 1.166 2008/02/23 16:33:43 fabiankeil
273 * Let forward_url() use the standard parameter ordering
274 * and mark its second parameter immutable.
276 * Revision 1.165 2008/02/02 19:36:56 fabiankeil
277 * Remove the "Listening ... for local connections only" log message.
278 * Whether or not remote connections are able to reach Privoxy is up
279 * to the operating system.
281 * Revision 1.164 2007/12/16 18:32:46 fabiankeil
282 * Prevent the log messages for CONNECT requests to unacceptable
283 * ports from printing the limit-connect argument as [null] if
284 * limit-connect hasn't been explicitly enabled.
286 * Revision 1.163 2007/12/13 01:47:11 david__schmidt
287 * Make sure all console-mode apps get a usage() instance
289 * Revision 1.162 2007/12/06 17:54:57 fabiankeil
290 * Reword NO_SERVER_DATA_RESPONSE to make it harder
291 * to misunderstand what the message is all about.
293 * Revision 1.161 2007/12/04 19:44:22 fabiankeil
294 * Unbreak trustfile which previously didn't work without
295 * FEATURE_TOGGLE. Fixes BR#1843585, reported by Lee.
297 * Revision 1.160 2007/11/29 18:00:29 fabiankeil
298 * Plug memory leak. Spotted by Valgrind, triggered by
299 * Privoxy-Regression-Test feeding proxyfuzz.py.
301 * Revision 1.159 2007/11/24 14:34:09 fabiankeil
302 * In the HTTP snipplets, refer to the client as client.
304 * Revision 1.158 2007/11/11 16:44:17 fabiankeil
305 * Emit a log message when activating the MS IIS5 hack.
307 * Revision 1.157 2007/11/03 17:34:49 fabiankeil
308 * Log the "weak randomization factor" warning only
309 * once for mingw32 and provide some more details.
311 * Revision 1.156 2007/11/01 18:20:58 fabiankeil
312 * Initialize log module after initializing mutexes, future
313 * deadlocks in that code should now work cross-platform.
315 * Revision 1.155 2007/10/23 20:12:45 fabiankeil
316 * Fix first CSUCCEED line to end in \r\n as required by RFC1945.
317 * Reported by Bert van Leeuwen in BR#1818808.
319 * Revision 1.154 2007/10/19 17:00:08 fabiankeil
320 * Downgrade "Flushing header and buffers" message to LOG_LEVEL_INFO.
322 * Revision 1.153 2007/10/14 14:12:41 fabiankeil
323 * When in daemon mode, close stderr after the configuration file has been
324 * parsed the first time. If logfile isn't set, stop logging. Fixes BR#897436.
326 * Revision 1.152 2007/10/04 18:03:34 fabiankeil
327 * - Fix a crash when parsing invalid requests whose first header
328 * is rejected by get_header(). Regression (re?)introduced
329 * in r1.143 by yours truly.
330 * - Move ACTION_VANILLA_WAFER handling into parsers.c's
331 * client_cookie_adder() to make sure send-vanilla-wafer can be
332 * controlled through tags (and thus regression-tested).
334 * Revision 1.151 2007/09/29 10:21:16 fabiankeil
335 * - Move get_filter_function() from jcc.c to filters.c
336 * so the filter functions can be static.
337 * - Don't bother filtering body-less responses.
339 * Revision 1.150 2007/09/28 16:39:29 fabiankeil
340 * Execute content filters through execute_content_filter().
342 * Revision 1.149 2007/09/04 15:08:48 fabiankeil
343 * Initialize req to NULL to make sure it's defined if the
344 * first read_socket() call fails. Reported by icmp30.
346 * Revision 1.148 2007/08/26 16:47:13 fabiankeil
347 * Add Stephen Gildea's --pre-chroot-nslookup patch [#1276666],
348 * extensive comments moved to user manual.
350 * Revision 1.147 2007/08/25 14:42:40 fabiankeil
351 * Don't crash if a broken header filter wiped out the request line.
353 * Revision 1.146 2007/08/20 17:09:32 fabiankeil
354 * Fix byte_count calculation in case of flushes
355 * and don't parse the server headers a second time.
357 * Revision 1.145 2007/08/19 13:13:31 fabiankeil
358 * - If there's a connection problem after we already forwarded
359 * parts of the original content, just hang up. Fixes BR#1776724.
360 * - Fix warnings about unused code on mingw32.
361 * - In case of flushes, calculate the byte count
362 * less incorrectly (I think).
364 * Revision 1.144 2007/08/11 14:43:22 fabiankeil
365 * Add some more prototypes for static functions.
367 * Revision 1.143 2007/08/05 13:58:19 fabiankeil
368 * Comment out request_contains_null_bytes() until it's used again.
370 * Revision 1.142 2007/08/05 13:50:26 fabiankeil
371 * #1763173 from Stefan Huehner: s@const static@static const@
372 * and declare some more functions static.
374 * Revision 1.141 2007/08/04 09:56:23 fabiankeil
375 * - Log rejected CONNECT requests with LOG_LEVEL_INFO
376 * and explain why they were rejected in the first place.
377 * - Fix the LOG_LEVEL_CLF message for crunches of unallowed
378 * CONNECT requests. The request line was missing.
379 * - Add two more XXX reminders as we don't have enough already.
381 * Revision 1.140 2007/07/21 11:51:36 fabiankeil
382 * As Hal noticed, checking dispatch_cgi() as the last cruncher
383 * looks like a bug if CGI requests are blocked unintentionally,
384 * so don't do it unless the user enabled the new config option
385 * "allow-cgi-request-crunching".
387 * Revision 1.139 2007/07/14 07:46:41 fabiankeil
388 * - Allow to rewrite the request destination behind the client's back.
389 * - Turn the weird-looking unconditional for loop that
390 * reads the client request into a conditional while loop.
391 * Move the stuff that only runs once out of the loop.
392 * - Move parts of chat(), server_content_type() and the
393 * necessary stuff to fix BR#1750917 into get_filter_function().
395 * Revision 1.138 2007/06/03 18:45:18 fabiankeil
396 * Temporary workaround for BR#1730105.
398 * Revision 1.137 2007/06/01 18:16:36 fabiankeil
399 * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
400 * deadlocks and crashes on OpenBSD and possibly other OS with neither
401 * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
402 * Thanks to Ralf Horstmann for report and solution.
404 * Revision 1.136 2007/06/01 16:41:11 fabiankeil
405 * Add forward-override{} to change the forwarding settings through
406 * action sections. This is mainly interesting to forward different
407 * clients differently (for example based on User-Agent or request
410 * Revision 1.135 2007/05/24 17:03:50 fabiankeil
411 * - Let usage() mention the --chroot parameter.
412 * - Use read_socket() consistently and always leave
413 * the last buffer byte alone, even in cases where
414 * null termination (currently) doesn't matter.
416 * Revision 1.134 2007/05/16 14:59:46 fabiankeil
417 * - Fix config file loading on Unix if no config file is specified.
418 * Since r1.97 Privoxy would always interpret the last argument as
419 * config file, even if it's a valid command line option.
420 * - Abort in case of unrecognized command line options. Closes #1719696.
421 * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
422 * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
424 * Revision 1.133 2007/05/04 11:23:19 fabiankeil
425 * - Don't rerun crunchers that only depend on the request URL.
426 * - Don't count redirects and CGI requests as "blocked requests".
428 * Revision 1.132 2007/04/25 15:15:17 fabiankeil
429 * Support crunching based on tags created by server-header taggers.
431 * Revision 1.131 2007/04/22 13:24:50 fabiankeil
432 * Make HTTP snippets static (again). Add a Content-Type for those
433 * with content so the browser doesn't guess it based on the URL.
435 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
436 * Move crunching and request line rebuilding out of chat().
438 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
439 * Introduce tags as alternative way to specify which
440 * actions apply to a request. At the moment tags can be
441 * created based on client and server headers.
443 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
444 * Don't CLF-log CONNECT requests twice.
446 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
447 * Log the source address for ACL-related connection drops.
449 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
450 * New config option: enforce-blocks.
452 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
453 * - Move null byte check into separate function.
454 * - Don't confuse the client with error pages
455 * if a CONNECT request was already confirmed.
457 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
458 * Speed up NULL byte escaping and only log the complete
459 * NULL byte requests with header debugging enabled.
461 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
462 * Answer requests that contain NULL bytes with
463 * a custom response instead of waiting for more
464 * data until the client eventually hangs up.
466 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
467 * - Move delivery and logging of crunched responses
468 * from chat() into send_crunch_response().
469 * - Display the reason for generating http_responses.
470 * - Log the content length for LOG_LEVEL_CLF correctly
471 * (still incorrect for some fixed responses).
472 * - Reword an incorrect comment about
473 * treat-forbidden-connects-like-blocks violating
475 * - Add some log messages.
477 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
478 * Move mutex initialization into separate
479 * function and exit in case of errors.
481 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
482 * - Start to reduce chat()'s line count and move
483 * parts of it into separate functions.
484 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
486 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
487 * - Add Proxy-Agent header to HTTP snippets that are
488 * supposed to reach HTTP clients only.
489 * - Made a few CONNECT log messages more descriptive.
490 * - Catch completely empty server responses (as seen
491 * with Tor's fake ".noconnect" top level domain).
492 * - Use shiny new "forwarding-failed" template for socks errors.
494 * Revision 1.118 2007/01/07 07:43:43 joergs
495 * AmigaOS4 support added.
497 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
498 * Added config option accept-intercepted-requests
499 * and disabled it by default.
501 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
502 * Reverted parts of my last commit
503 * to keep error handling working.
505 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
506 * Fixed gcc43 conversion warnings.
508 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
509 * Fix -pedantic ISO C warning about converting
510 * from function pointer to object pointer.
512 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
513 * Silence compiler warning I introduced with my last commit.
515 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
516 * Mutex protect rand() if POSIX threading
517 * is used, warn the user if that's not possible
518 * and stop using it on _WIN32 where it could
521 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
522 * Don't prevent core dumps by catching SIGABRT.
523 * It's rude and makes debugging unreasonable painful.
525 * Revision 1.110 2006/12/13 14:52:53 etresoft
526 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
528 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
529 * Privoxy is now able to run as intercepting
530 * proxy in combination with any packet filter
531 * that does the port redirection. The destination
532 * is extracted from the "Host:" header which
533 * should be available for nearly all requests.
535 * Moved HTTP snipplets into jcc.c.
536 * Added error message for gopher proxy requests.
538 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
539 * Only unlink the pidfile if it's actually used.
541 * Change order of interception checks to make
542 * it possible to block or redirect requests for
545 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
546 * Make pthread mutex locking more generic. Instead of
547 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
548 * and use mutex locking unless there is an _r function
549 * available. Better safe than sorry.
551 * Fixes "./configure --disable-pthread" and should result
552 * in less threading-related problems on pthread-using platforms,
553 * but it still doesn't fix BR#1122404.
555 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
556 * Move pthread.h inclusion from jcc.c to jcc.h.
557 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
559 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
560 * Don't exit after receiving the second SIGHUP on Solaris.
562 * Fixes BR 1052235, but the same problem may exist on other
563 * systems. Once 3.0.6 is out we should use sigset()
564 * where available and see if it breaks anything.
566 * Revision 1.104 2006/09/23 13:26:38 roro
567 * Replace TABs by spaces in source code.
569 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
570 * Fix +redirect{}. Didn't work with -fast-redirects.
572 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
573 * Respond with 400 and a short text message
574 * if the client tries to use Privoxy as FTP proxy.
576 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
577 * Make number of retries in case of forwarded-connect problems
578 * a config file option (forwarded-connect-retries) and use 0 as
581 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
582 * Set random(3) seed.
584 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
585 * Follow the OpenBSD port's lead and protect the resolve
586 * functions on OpenBSD as well.
588 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
589 * --user fix. Only use the user as group if no group is specified.
590 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
592 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
593 * Windows service (re-)integration
597 * --install[:service_name]
598 * --uninstall[:service_name]
601 * They work as follows:
602 * --install will create a service for you and then terminate.
603 * By default the service name will be "privoxy" (without the quotes).
604 * However you can run multiple services if you wish, just by adding
605 * a colon and then a name (no spaces).
607 * --uninstall follows the exact same rules a --install.
609 * --service is used when the program is executed by the service
610 * control manager, and in normal circumstances would never be
611 * used as a command line argument.
613 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
614 * Windows service integration
616 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
617 * Incorporate Fabian Keil's patch work:
618 http://www.fabiankeil.de/sourcecode/privoxy/
620 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
621 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
622 * with what was really the latest development (the v_3_0_branch branch)
624 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
625 * Thanks to Jindrich Makovicka for a race condition fix for the log
626 * file. The race condition remains for non-pthread implementations.
627 * Reference patch #1175720.
629 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
630 * Add the ability to check jpeg images for invalid
631 * lengths of comment blocks. Defensive strategy
632 * against the exploit:
633 * Microsoft Security Bulletin MS04-028
634 * Buffer Overrun in JPEG Processing (GDI+) Could
635 * Allow Code Execution (833987)
636 * Enabled with +inspect-jpegs in actions files.
638 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
639 * - Fixed usage info for non-unix platforms
640 * - Fixed small cmdline parsing bug
642 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
643 * Diagnostics: Now preserve the returncode of pthread_create
644 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
646 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
647 * No longer ignore SIGCHLD. Fixes bug #769381
649 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
650 * Close jarfile on graceful exit, remove stray line
652 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
653 * Cosmetics: Killed a warning, a typo and an allocation left at exit
655 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
656 * No longer rely on non-POSIX.1 extensions of getcwd().
659 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
660 * Replaced setenv() by posix-compliant putenv()
661 * Thanks to Neil McCalden (nmcc AT users.sf.net).
663 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
664 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
666 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
667 * Clean-up and extension of improvements for forked mode:
668 * - Child's return code now consists of flags RC_FLAG_*
669 * - Reporting toggle to parent now properly #ifdef'ed
670 * - Children now report blocking to parent. This enables
671 * statistics in forked mode
673 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
674 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
675 * Children now report having been toggled through _exit(17), parents
676 * watch for that code and toggle themselves if found.
678 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
679 * Wrapping all *_r functions (the non-_r versions of them) with
680 * mutex semaphores for OSX. Hopefully this will take care of all
681 * of those pesky crash reports.
683 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
684 * Fixed two mostly harmless mem leaks
686 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
687 * Fix: Head of global clients list now initialized to NULL
689 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
690 * Added basic support for OPTIONS and TRACE HTTP methods:
691 * - New interceptor direct_response() added in chat().
692 * - sed() moved to earlier in the process, so that the
693 * Host: header is evaluated before actions and forwarding
696 * Revision 1.92 2002/05/08 16:00:46 oes
697 * Chat's buffer handling:
698 * - Fixed bug with unchecked out-of-mem conditions
699 * while reading client request & server headers
700 * - No longer predict if the buffer limit will be exceeded
701 * in the next read -- check add_to_iob's new
702 * return code. If buffer couldn't be extended
703 * (policy or out-of-mem) while
704 * - reading from client: abort
705 * - reading server headers: send error page
706 * - buffering server body for filter: flush,
707 * and if that fails: send error page
709 * Revision 1.91 2002/04/08 20:35:58 swa
712 * Revision 1.90 2002/04/02 14:57:28 oes
713 * Made sending wafers independent of FEATURE_COOKIE_JAR
715 * Revision 1.89 2002/03/31 17:18:59 jongfoster
716 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
718 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
719 * More compiler warning message maintenance
721 * Revision 1.87 2002/03/26 22:29:54 swa
722 * we have a new homepage!
724 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
725 * Workaround for closing the jarfile before load_config() comes around again
727 * Revision 1.85 2002/03/24 15:23:33 jongfoster
730 * Revision 1.84 2002/03/24 13:25:43 swa
731 * name change related issues
733 * Revision 1.83 2002/03/16 23:54:06 jongfoster
734 * Adding graceful termination feature, to help look for memory leaks.
735 * If you enable this (which, by design, has to be done by hand
736 * editing config.h) and then go to http://i.j.b/die, then the program
737 * will exit cleanly after the *next* request. It should free all the
738 * memory that was used.
740 * Revision 1.82 2002/03/13 00:27:05 jongfoster
743 * Revision 1.81 2002/03/12 01:42:50 oes
744 * Introduced modular filters
746 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
747 * OS/2 port maintenance:
748 * - Fixed EMX build - it had decayed a little
749 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
750 * substituted a memset for now.
752 * Revision 1.79 2002/03/09 20:03:52 jongfoster
753 * - Making various functions return int rather than size_t.
754 * (Undoing a recent change). Since size_t is unsigned on
755 * Windows, functions like read_socket that return -1 on
756 * error cannot return a size_t.
758 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
759 * crashes, and also frequently caused JB to jump to 100%
760 * CPU and stay there. (Because it thought it had just
761 * read ((unsigned)-1) == 4Gb of data...)
763 * - The signature of write_socket has changed, it now simply
764 * returns success=0/failure=nonzero.
766 * - Trying to get rid of a few warnings --with-debug on
767 * Windows, I've introduced a new type "jb_socket". This is
768 * used for the socket file descriptors. On Windows, this
769 * is SOCKET (a typedef for unsigned). Everywhere else, it's
770 * an int. The error value can't be -1 any more, so it's
771 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
772 * Windows it maps to the #define INVALID_SOCKET.)
774 * - The signature of bind_port has changed.
776 * Revision 1.78 2002/03/08 21:35:04 oes
777 * Added optional group supplement to --user option. Will now use default group of user if no group given
779 * Revision 1.77 2002/03/07 03:52:06 oes
780 * - Fixed compiler warnings etc
781 * - Improved handling of failed DNS lookups
783 * Revision 1.76 2002/03/06 22:54:35 jongfoster
784 * Automated function-comment nitpicking.
786 * Revision 1.75 2002/03/06 10:02:19 oes
787 * Fixed stupid bug when --user was not given
789 * Revision 1.74 2002/03/06 00:49:31 jongfoster
790 * Fixing warning on Windows
791 * Making #ifdefs that refer to the same variable consistently
792 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
794 * Revision 1.73 2002/03/05 23:57:30 hal9
795 * Stray character 's' on line 1618 was breaking build.
797 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
798 * - Re-enable OS/2 building after new parms were added
799 * - Fix false out of memory report when resolving CGI templates when no IP
800 * address is available of failed attempt (a la no such domain)
802 * Revision 1.71 2002/03/05 18:13:56 oes
803 * Added --user option
805 * Revision 1.70 2002/03/05 04:52:42 oes
806 * Deleted non-errlog debugging code
808 * Revision 1.69 2002/03/04 23:50:00 jongfoster
809 * Splitting off bind_port() call into bind_port_helper(), with
812 * Revision 1.68 2002/03/04 20:17:32 oes
815 * Revision 1.67 2002/03/04 18:18:57 oes
816 * - Removed _DEBUG mode
817 * - Cleand up cmdline parsing
818 * - Introduced --no-daemon, --pidfile options
819 * - Cleaned up signal handling:
820 * - Terminate cleanly on INT, TERM and ABRT
821 * - Schedule logfile for re-opening on HUP
822 * - Ignore CHLD and PIPE
823 * - Leave the rest with their default handlers
824 * - Uniform handler registration
825 * - Added usage() function
826 * - Played styleguide police
828 * Revision 1.66 2002/03/03 15:06:55 oes
829 * Re-enabled automatic config reloading
831 * Revision 1.65 2002/03/03 14:49:11 oes
832 * Fixed CLF logging: Now uses client's original HTTP request
834 * Revision 1.64 2002/03/03 09:18:03 joergs
835 * Made jumbjuster work on AmigaOS again.
837 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
838 * Clean up a little CRLF unpleasantness that suddenly appeared
840 * Revision 1.62 2002/02/20 23:17:23 jongfoster
841 * Detecting some out-of memory conditions and exiting with a log message.
843 * Revision 1.61 2002/01/17 21:01:52 jongfoster
844 * Moving all our URL and URL pattern parsing code to urlmatch.c.
846 * Revision 1.60 2001/12/30 14:07:32 steudten
847 * - Add signal handling (unix)
848 * - Add SIGHUP handler (unix)
849 * - Add creation of pidfile (unix)
850 * - Add action 'top' in rc file (RH)
851 * - Add entry 'SIGNALS' to manpage
852 * - Add exit message to logfile (unix)
854 * Revision 1.59 2001/12/13 14:07:18 oes
855 * Fixed Bug: 503 error page now sent OK
857 * Revision 1.58 2001/11/30 23:37:24 jongfoster
858 * Renaming the Win32 config file to config.txt - this is almost the
859 * same as the corresponding UNIX name "config"
861 * Revision 1.57 2001/11/16 00:47:43 jongfoster
862 * Changing the tty-disconnection code to use setsid().
864 * Revision 1.56 2001/11/13 20:20:54 jongfoster
865 * Tabs->spaces, fixing a bug with missing {} around an if()
867 * Revision 1.55 2001/11/13 20:14:53 jongfoster
868 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
870 * Revision 1.54 2001/11/07 00:03:14 steudten
871 * Give reliable return value if an error
872 * occurs not just 0 with new daemon mode.
874 * Revision 1.53 2001/11/05 21:41:43 steudten
875 * Add changes to be a real daemon just for unix os.
876 * (change cwd to /, detach from controlling tty, set
877 * process group and session leader to the own process.
879 * Add some fatal-error log message for failed malloc().
880 * Add '-d' if compiled with 'configure --with-debug' to
881 * enable debug output.
883 * Revision 1.52 2001/10/26 20:11:20 jongfoster
884 * Fixing type mismatch
886 * Revision 1.51 2001/10/26 17:38:28 oes
889 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
890 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
891 * threads to call select() simultaneously. So, it's time to do a real, live,
892 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
893 * (native). Both versions will work, but using __OS2__ offers multi-threading.
895 * Revision 1.49 2001/10/23 21:41:35 jongfoster
896 * Added call to initialize the (statically-allocated of course)
897 * "out of memory" CGI response.
899 * Revision 1.48 2001/10/10 19:56:46 jongfoster
900 * Moving some code that wasn't cookie-related out of an #ifdef
903 * Revision 1.47 2001/10/10 16:44:36 oes
904 * Added CONNECT destination port limitation check
906 * Revision 1.46 2001/10/08 15:17:41 oes
907 * Re-enabled SSL forwarding
909 * Revision 1.45 2001/10/07 15:42:11 oes
910 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
912 * Moved downgrading of the HTTP version from parse_http_request to
913 * chat(), since we can't decide if it is necessary before we have
914 * determined the actions for the URL. The HTTP command is now
915 * *always* re-built so the repairs need no longer be special-cased.
917 * filter_popups now gets a csp pointer so it can raise the new
918 * CSP_FLAG_MODIFIED flag.
922 * Added configurable size limit for the IOB. If the IOB grows so
923 * large that the next read would exceed the limit, the header
924 * is generated, and the header & unfiltered buffer are flushed
925 * to the client. Chat then continues in non-buffering,
926 * non-filtering body mode.
928 * Revision 1.44 2001/10/02 18:13:57 oes
931 * Revision 1.43 2001/10/02 15:32:13 oes
932 * Moved generation of hdr
934 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
935 * Cleaning up 2 compiler warnings on OS/2.
937 * Revision 1.41 2001/09/16 17:05:14 jongfoster
938 * Removing unused #include showarg.h
940 * Revision 1.40 2001/09/16 15:41:45 jongfoster
941 * Fixing signed/unsigned comparison warning.
943 * Revision 1.39 2001/09/16 13:21:27 jongfoster
944 * Changes to use new list functions.
946 * Revision 1.38 2001/09/16 13:01:46 jongfoster
947 * Removing redundant function call that zeroed zalloc()'d memory.
949 * Revision 1.37 2001/09/10 11:12:24 oes
950 * Deleted unused variable
952 * Revision 1.36 2001/09/10 10:56:15 oes
953 * Silenced compiler warnings
955 * Revision 1.35 2001/07/31 14:44:22 oes
956 * Deleted unused size parameter from filter_popups()
958 * Revision 1.34 2001/07/30 22:08:36 jongfoster
959 * Tidying up #defines:
960 * - All feature #defines are now of the form FEATURE_xxx
961 * - Permanently turned off WIN_GUI_EDIT
962 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
964 * Revision 1.33 2001/07/29 19:32:00 jongfoster
965 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
967 * Revision 1.32 2001/07/29 18:47:05 jongfoster
968 * Adding missing #include "loadcfg.h"
970 * Revision 1.31 2001/07/29 12:17:48 oes
971 * Applied pthread fix by Paul Lieverse
973 * Revision 1.30 2001/07/25 22:57:13 jongfoster
974 * __BEOS__ no longer overrides FEATURE_PTHREAD.
975 * This is because FEATURE_PTHREAD will soon be widely used, so I
976 * want to keep it simple.
978 * Revision 1.29 2001/07/24 12:47:06 oes
979 * Applied BeOS support update by Eugenia
981 * Revision 1.28 2001/07/23 13:26:12 oes
982 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
984 * Revision 1.27 2001/07/19 19:09:47 haroon
985 * - Added code to take care of the situation where while processing the first
986 * server response (which includes the server header), after finding the end
987 * of the headers we were not looking past the end of the headers for
988 * content modification. I enabled it for filter_popups.
989 * Someone else should look to see if other similar operations should be
990 * done to the discarded portion of the buffer.
992 * Note 2001/07/20: No, the other content modification mechanisms will process
993 * the whole iob later anyway. --oes
995 * Revision 1.26 2001/07/18 12:31:36 oes
998 * Revision 1.25 2001/07/15 19:43:49 jongfoster
999 * Supports POSIX threads.
1000 * Also removed some unused #includes.
1002 * Revision 1.24 2001/07/13 14:00:40 oes
1003 * - Generic content modification scheme:
1004 * Each feature has its own applicability flag that is set
1005 * from csp->action->flags.
1006 * Replaced the "filtering" int flag , by a function pointer
1007 * "content_filter" to the function that will do the content
1008 * modification. If it is != NULL, the document will be buffered
1009 * and processed through *content_filter, which must set
1010 * csp->content_length and return a modified copy of the body
1011 * or return NULL (on failiure).
1012 * - Changed csp->is_text to the more generic bitmap csp->content_type
1013 * which can currently take the valued CT_TEXT or CT_GIF
1014 * - Reformatting etc
1015 * - Removed all #ifdef PCRS
1017 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
1018 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
1019 * the `block_acl' call. This prevents a compilation error when the user
1020 * does not wish to use the "ACL" feature.
1022 * Revision 1.22 2001/06/29 21:45:41 oes
1023 * Indentation, CRLF->LF, Tab-> Space
1025 * Revision 1.21 2001/06/29 13:29:36 oes
1026 * - Cleaned up, improved comments
1027 * - Unified all possible interceptors (CGI,
1028 * block, trust, fast_redirect) in one
1029 * place, with one (CGI) answer generation
1030 * mechansim. Much clearer now.
1031 * - Removed the GIF image generation, which
1032 * is now done in filters.c:block_url()
1033 * - Made error conditions like domain lookup
1034 * failiure or (various) problems while talking
1035 * to the server use cgi.c:error_response()
1036 * instead of generating HTML/HTTP in chat() (yuck!)
1037 * - Removed logentry from cancelled commit
1039 * Revision 1.20 2001/06/09 10:55:28 jongfoster
1040 * Changing BUFSIZ ==> BUFFER_SIZE
1042 * Revision 1.19 2001/06/07 23:12:52 jongfoster
1043 * Replacing function pointer in struct gateway with a directly
1044 * called function forwarded_connect().
1045 * Replacing struct gateway with struct forward_spec
1047 * Revision 1.18 2001/06/03 19:12:16 oes
1048 * introduced new cgi handling
1050 * Revision 1.17 2001/06/01 20:07:23 jongfoster
1051 * Now uses action +image-blocker{} rather than config->tinygif
1053 * Revision 1.16 2001/06/01 18:49:17 jongfoster
1054 * Replaced "list_share" with "list" - the tiny memory gain was not
1055 * worth the extra complexity.
1057 * Revision 1.15 2001/05/31 21:24:47 jongfoster
1058 * Changed "permission" to "action" throughout.
1059 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
1060 * Moved vanilla wafer check into chat(), since we must now
1061 * decide whether or not to add it based on the URL.
1063 * Revision 1.14 2001/05/29 20:14:01 joergs
1064 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
1067 * Revision 1.13 2001/05/29 09:50:24 jongfoster
1068 * Unified blocklist/imagelist/permissionslist.
1069 * File format is still under discussion, but the internal changes
1070 * are (mostly) done.
1072 * Also modified interceptor behaviour:
1073 * - We now intercept all URLs beginning with one of the following
1074 * prefixes (and *only* these prefixes):
1076 * * http://ijbswa.sf.net/config/
1077 * * http://ijbswa.sourceforge.net/config/
1078 * - New interceptors "home page" - go to http://i.j.b/ to see it.
1079 * - Internal changes so that intercepted and fast redirect pages
1080 * are not replaced with an image.
1081 * - Interceptors now have the option to send a binary page direct
1082 * to the client. (i.e. ijb-send-banner uses this)
1083 * - Implemented show-url-info interceptor. (Which is why I needed
1084 * the above interceptors changes - a typical URL is
1085 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
1086 * The previous mechanism would not have intercepted that, and
1087 * if it had been intercepted then it then it would have replaced
1088 * it with an image.)
1090 * Revision 1.12 2001/05/27 22:17:04 oes
1092 * - re_process_buffer no longer writes the modified buffer
1093 * to the client, which was very ugly. It now returns the
1094 * buffer, which it is then written by chat.
1096 * - content_length now adjusts the Content-Length: header
1097 * for modified documents rather than crunch()ing it.
1098 * (Length info in csp->content_length, which is 0 for
1099 * unmodified documents)
1101 * - For this to work, sed() is called twice when filtering.
1103 * Revision 1.11 2001/05/26 17:27:53 jongfoster
1104 * Added support for CLF and fixed LOG_LEVEL_LOG.
1105 * Also did CRLF->LF fix of my previous patch.
1107 * Revision 1.10 2001/05/26 15:26:15 jongfoster
1108 * ACL feature now provides more security by immediately dropping
1109 * connections from untrusted hosts.
1111 * Revision 1.9 2001/05/26 00:28:36 jongfoster
1112 * Automatic reloading of config file.
1113 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
1114 * Most of the global variables have been moved to a new
1115 * struct configuration_spec, accessed through csp->config->globalname
1116 * Most of the globals remaining are used by the Win32 GUI.
1118 * Revision 1.8 2001/05/25 22:43:18 jongfoster
1119 * Fixing minor memory leak and buffer overflow.
1121 * Revision 1.7 2001/05/25 22:34:30 jongfoster
1124 * Revision 1.6 2001/05/23 00:13:58 joergs
1125 * AmigaOS support fixed.
1127 * Revision 1.5 2001/05/22 18:46:04 oes
1129 * - Enabled filtering banners by size rather than URL
1130 * by adding patterns that replace all standard banner
1131 * sizes with the "Junkbuster" gif to the re_filterfile
1133 * - Enabled filtering WebBugs by providing a pattern
1134 * which kills all 1x1 images
1136 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
1137 * which is selected by the (nonstandard and therefore
1138 * capital) letter 'U' in the option string.
1139 * It causes the quantifiers to be ungreedy by default.
1140 * Appending a ? turns back to greedy (!).
1142 * - Added a new interceptor ijb-send-banner, which
1143 * sends back the "Junkbuster" gif. Without imagelist or
1144 * MSIE detection support, or if tinygif = 1, or the
1145 * URL isn't recognized as an imageurl, a lame HTML
1146 * explanation is sent instead.
1148 * - Added new feature, which permits blocking remote
1149 * script redirects and firing back a local redirect
1151 * The feature is conditionally compiled, i.e. it
1152 * can be disabled with --disable-fast-redirects,
1153 * plus it must be activated by a "fast-redirects"
1154 * line in the config file, has its own log level
1155 * and of course wants to be displayed by show-proxy-args
1156 * Note: Boy, all the #ifdefs in 1001 locations and
1157 * all the fumbling with configure.in and acconfig.h
1158 * were *way* more work than the feature itself :-(
1160 * - Because a generic redirect template was needed for
1161 * this, tinygif = 3 now uses the same.
1163 * - Moved GIFs, and other static HTTP response templates
1166 * - Some minor fixes
1168 * - Removed some >400 CRs again (Jon, you really worked
1171 * Revision 1.4 2001/05/21 19:34:01 jongfoster
1172 * Made failure to bind() a fatal error.
1174 * Revision 1.3 2001/05/20 01:21:20 jongfoster
1175 * Version 2.9.4 checkin.
1176 * - Merged popupfile and cookiefile, and added control over PCRS
1177 * filtering, in new "permissionsfile".
1178 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
1179 * file error you now get a message box (in the Win32 GUI) rather
1180 * than the program exiting with no explanation.
1181 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
1183 * - Removed tabs from "config"
1184 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
1185 * - Bumped up version number.
1187 * Revision 1.2 2001/05/17 22:34:44 oes
1188 * - Added hint on GIF char array generation to jcc.c
1189 * - Cleaned CRLF's from the sources and related files
1190 * - Repaired logging for REF and FRC
1192 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
1193 * Initial import of version 2.9.3 source tree
1196 *********************************************************************/
1202 #include <sys/types.h>
1211 # ifndef FEATURE_PTHREAD
1215 # include <windows.h>
1216 # include <process.h>
1217 # endif /* ndef FEATURE_PTHREAD */
1220 # ifndef _WIN_CONSOLE
1221 # include "w32log.h"
1222 # endif /* ndef _WIN_CONSOLE */
1223 # include "w32svrapi.h"
1225 #else /* ifndef _WIN32 */
1227 # if !defined (__OS2__)
1228 # include <unistd.h>
1229 # include <sys/wait.h>
1230 # endif /* ndef __OS2__ */
1231 # include <sys/time.h>
1232 # include <sys/stat.h>
1233 # include <sys/ioctl.h>
1236 #include <sys/termios.h>
1244 # include <signal.h>
1247 # include <socket.h> /* BeOS has select() for sockets only. */
1248 # include <OS.h> /* declarations for threads and stuff. */
1251 # if defined(__EMX__) || defined(__OS2__)
1252 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
1257 #define bzero(B,N) memset(B,0x00,n)
1261 # include <select.h>
1266 #include "project.h"
1269 #include "filters.h"
1270 #include "loaders.h"
1271 #include "parsers.h"
1272 #include "miscutil.h"
1274 #include "jbsockets.h"
1275 #include "gateway.h"
1276 #include "actions.h"
1278 #include "loadcfg.h"
1279 #include "urlmatch.h"
1281 const char jcc_h_rcs[] = JCC_H_VERSION;
1282 const char project_h_rcs[] = PROJECT_H_VERSION;
1285 struct client_state clients[1];
1286 struct file_list files[1];
1288 #ifdef FEATURE_STATISTICS
1289 int urls_read = 0; /* total nr of urls read inc rejected */
1290 int urls_rejected = 0; /* total nr of urls rejected */
1291 #endif /* def FEATURE_STATISTICS */
1293 #ifdef FEATURE_GRACEFUL_TERMINATION
1294 int g_terminate = 0;
1297 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1298 static void sig_handler(int the_signal);
1300 static int client_protocol_is_unsupported(const struct client_state *csp, char *req);
1301 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
1302 static jb_err get_server_headers(struct client_state *csp);
1303 static const char *crunch_reason(const struct http_response *rsp);
1304 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp);
1305 static char *get_request_line(struct client_state *csp);
1306 static jb_err receive_client_request(struct client_state *csp);
1307 static jb_err parse_client_request(struct client_state *csp);
1308 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
1309 static jb_err change_request_destination(struct client_state *csp);
1310 static void chat(struct client_state *csp);
1311 static void serve(struct client_state *csp);
1312 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1313 static void usage(const char *myname);
1315 static void initialize_mutexes(void);
1316 static jb_socket bind_port_helper(struct configuration_spec *config);
1317 static void listen_loop(void);
1320 void serve(struct client_state *csp);
1321 #else /* ifndef AMIGA */
1322 static void serve(struct client_state *csp);
1323 #endif /* def AMIGA */
1326 static int32 server_thread(void *data);
1327 #endif /* def __BEOS__ */
1330 #define sleep(N) Sleep(((N) * 1000))
1334 #define sleep(N) DosSleep(((N) * 100))
1337 #ifdef MUTEX_LOCKS_AVAILABLE
1339 * XXX: Does the locking stuff really belong in this file?
1341 privoxy_mutex_t log_mutex;
1342 privoxy_mutex_t log_init_mutex;
1343 privoxy_mutex_t connection_reuse_mutex;
1345 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
1346 privoxy_mutex_t resolver_mutex;
1347 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
1349 #ifndef HAVE_GMTIME_R
1350 privoxy_mutex_t gmtime_mutex;
1351 #endif /* ndef HAVE_GMTIME_R */
1353 #ifndef HAVE_LOCALTIME_R
1354 privoxy_mutex_t localtime_mutex;
1355 #endif /* ndef HAVE_GMTIME_R */
1358 privoxy_mutex_t rand_mutex;
1359 #endif /* ndef HAVE_RANDOM */
1361 #endif /* def MUTEX_LOCKS_AVAILABLE */
1364 const char *basedir = NULL;
1365 const char *pidfile = NULL;
1366 static int received_hup_signal = 0;
1367 #endif /* defined unix */
1369 /* HTTP snipplets. */
1370 static const char CSUCCEED[] =
1371 "HTTP/1.0 200 Connection established\r\n"
1372 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
1374 static const char CHEADER[] =
1375 "HTTP/1.0 400 Invalid header received from client\r\n"
1376 "Proxy-Agent: Privoxy " VERSION "\r\n"
1377 "Content-Type: text/plain\r\n"
1378 "Connection: close\r\n\r\n"
1379 "Invalid header received from client.\r\n";
1381 static const char FTP_RESPONSE[] =
1382 "HTTP/1.0 400 Invalid request received from client\r\n"
1383 "Content-Type: text/plain\r\n"
1384 "Connection: close\r\n\r\n"
1385 "Invalid request. Privoxy doesn't support FTP.\r\n";
1387 static const char GOPHER_RESPONSE[] =
1388 "HTTP/1.0 400 Invalid request received from client\r\n"
1389 "Content-Type: text/plain\r\n"
1390 "Connection: close\r\n\r\n"
1391 "Invalid request. Privoxy doesn't support gopher.\r\n";
1393 /* XXX: should be a template */
1394 static const char MISSING_DESTINATION_RESPONSE[] =
1395 "HTTP/1.0 400 Bad request received from client\r\n"
1396 "Proxy-Agent: Privoxy " VERSION "\r\n"
1397 "Content-Type: text/plain\r\n"
1398 "Connection: close\r\n\r\n"
1399 "Bad request. Privoxy was unable to extract the destination.\r\n";
1401 /* XXX: should be a template */
1402 static const char NO_SERVER_DATA_RESPONSE[] =
1403 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1404 "Proxy-Agent: Privoxy " VERSION "\r\n"
1405 "Content-Type: text/plain\r\n"
1406 "Connection: close\r\n\r\n"
1407 "Empty server or forwarder response.\r\n"
1408 "The connection has been closed but Privoxy didn't receive any data.\r\n";
1410 /* XXX: should be a template */
1411 static const char INVALID_SERVER_HEADERS_RESPONSE[] =
1412 "HTTP/1.0 502 Server or forwarder response invalid\r\n"
1413 "Proxy-Agent: Privoxy " VERSION "\r\n"
1414 "Content-Type: text/plain\r\n"
1415 "Connection: close\r\n\r\n"
1416 "Bad response. The server or forwarder response doesn't look like HTTP.\r\n";
1419 /* XXX: should be a template */
1420 static const char NULL_BYTE_RESPONSE[] =
1421 "HTTP/1.0 400 Bad request received from client\r\n"
1422 "Proxy-Agent: Privoxy " VERSION "\r\n"
1423 "Content-Type: text/plain\r\n"
1424 "Connection: close\r\n\r\n"
1425 "Bad request. Null byte(s) before end of request.\r\n";
1428 /* XXX: should be a template */
1429 static const char MESSED_UP_REQUEST_RESPONSE[] =
1430 "HTTP/1.0 400 Malformed request after rewriting\r\n"
1431 "Proxy-Agent: Privoxy " VERSION "\r\n"
1432 "Content-Type: text/plain\r\n"
1433 "Connection: close\r\n\r\n"
1434 "Bad request. Messed up with header filters.\r\n";
1436 /* XXX: should be a template */
1437 static const char CONNECTION_TIMEOUT_RESPONSE[] =
1438 "HTTP/1.0 502 Connection timeout\r\n"
1439 "Proxy-Agent: Privoxy " VERSION "\r\n"
1440 "Content-Type: text/plain\r\n"
1441 "Connection: close\r\n\r\n"
1442 "The connection timed out.\r\n";
1444 /* A function to crunch a response */
1445 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
1447 /* Crunch function flags */
1448 #define CF_NO_FLAGS 0
1449 /* Cruncher applies to forced requests as well */
1450 #define CF_IGNORE_FORCE 1
1451 /* Crunched requests are counted for the block statistics */
1452 #define CF_COUNT_AS_REJECT 2
1454 /* A crunch function and its flags */
1457 const crunch_func_ptr cruncher;
1461 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
1463 /* Complete list of cruncher functions */
1464 static const struct cruncher crunchers_all[] = {
1465 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
1466 { block_url, CF_COUNT_AS_REJECT },
1467 #ifdef FEATURE_TRUST
1468 { trust_url, CF_COUNT_AS_REJECT },
1469 #endif /* def FEATURE_TRUST */
1470 { redirect_url, CF_NO_FLAGS },
1471 { dispatch_cgi, CF_IGNORE_FORCE},
1475 /* Light version, used after tags are applied */
1476 static const struct cruncher crunchers_light[] = {
1477 { block_url, CF_COUNT_AS_REJECT },
1478 { redirect_url, CF_NO_FLAGS },
1484 * XXX: Don't we really mean
1490 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1491 /*********************************************************************
1493 * Function : sig_handler
1495 * Description : Signal handler for different signals.
1496 * Exit gracefully on TERM and INT
1497 * or set a flag that will cause the errlog
1498 * to be reopened by the main thread on HUP.
1501 * 1 : the_signal = the signal cause this function to call
1505 *********************************************************************/
1506 static void sig_handler(int the_signal)
1512 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1524 received_hup_signal = 1;
1530 * We shouldn't be here, unless we catch signals
1531 * in main() that we can't handle here!
1533 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1541 /*********************************************************************
1543 * Function : client_protocol_is_unsupported
1545 * Description : Checks if the client used a known unsupported
1546 * protocol and deals with it by sending an error
1550 * 1 : csp = Current client state (buffers, headers, etc...)
1551 * 2 : req = the first request line send by the client
1553 * Returns : TRUE if an error response has been generated, or
1554 * FALSE if the request doesn't look invalid.
1556 *********************************************************************/
1557 static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1560 * If it's a FTP or gopher request, we don't support it.
1562 * These checks are better than nothing, but they might
1563 * not work in all configurations and some clients might
1564 * have problems digesting the answer.
1566 * They should, however, never cause more problems than
1567 * Privoxy's old behaviour (returning the misleading HTML
1570 * "Could not resolve http://(ftp|gopher)://example.org").
1572 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1574 const char *response = NULL;
1575 const char *protocol = NULL;
1577 if (!strncmpic(req, "GET ftp://", 10))
1579 response = FTP_RESPONSE;
1584 response = GOPHER_RESPONSE;
1585 protocol = "GOPHER";
1587 log_error(LOG_LEVEL_ERROR,
1588 "%s tried to use Privoxy as %s proxy: %s",
1589 csp->ip_addr_str, protocol, req);
1590 log_error(LOG_LEVEL_CLF,
1591 "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1593 write_socket(csp->cfd, response, strlen(response));
1602 /*********************************************************************
1604 * Function : get_request_destination_elsewhere
1606 * Description : If the client's request was redirected into
1607 * Privoxy without the client's knowledge,
1608 * the request line lacks the destination host.
1610 * This function tries to get it elsewhere,
1611 * provided accept-intercepted-requests is enabled.
1613 * "Elsewhere" currently only means "Host: header",
1614 * but in the future we may ask the redirecting
1615 * packet filter to look the destination up.
1617 * If the destination stays unknown, an error
1618 * response is send to the client and headers
1619 * are freed so that chat() can return directly.
1622 * 1 : csp = Current client state (buffers, headers, etc...)
1623 * 2 : headers = a header list
1625 * Returns : JB_ERR_OK if the destination is now known, or
1626 * JB_ERR_PARSE if it isn't.
1628 *********************************************************************/
1629 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1633 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1635 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1636 " Privoxy isn't configured to accept intercepted requests.",
1637 csp->ip_addr_str, csp->http->cmd);
1638 /* XXX: Use correct size */
1639 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1640 csp->ip_addr_str, csp->http->cmd);
1642 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1643 destroy_list(headers);
1645 return JB_ERR_PARSE;
1647 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1649 /* Split the domain we just got for pattern matching */
1650 init_domain_components(csp->http);
1656 /* We can't work without destination. Go spread the news.*/
1658 req = list_to_text(headers);
1660 /* XXX: Use correct size */
1661 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1662 csp->ip_addr_str, csp->http->cmd);
1663 log_error(LOG_LEVEL_ERROR,
1664 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1665 csp->ip_addr_str, csp->http->cmd, req);
1668 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
1669 destroy_list(headers);
1671 return JB_ERR_PARSE;
1674 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1675 * to get the destination IP address, use it as host directly
1676 * or do a reverse DNS lookup first.
1681 /*********************************************************************
1683 * Function : get_server_headers
1685 * Description : Parses server headers in iob and fills them
1686 * into csp->headers so that they can later be
1690 * 1 : csp = Current client state (buffers, headers, etc...)
1692 * Returns : JB_ERR_OK if everything went fine, or
1693 * JB_ERR_PARSE if the headers were incomplete.
1695 *********************************************************************/
1696 static jb_err get_server_headers(struct client_state *csp)
1698 int continue_hack_in_da_house = 0;
1701 while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
1706 * continue hack in da house. Ignore the ending of
1707 * this head and continue enlisting header lines.
1708 * The reason is described below.
1710 enlist(csp->headers, "");
1711 continue_hack_in_da_house = 0;
1714 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1717 * It's a bodyless continue response, don't
1718 * stop header parsing after reaching its end.
1720 * As a result Privoxy will concatenate the
1721 * next response's head and parse and deliver
1722 * the headers as if they belonged to one request.
1724 * The client will separate them because of the
1725 * empty line between them.
1727 * XXX: What we're doing here is clearly against
1728 * the intended purpose of the continue header,
1729 * and under some conditions (HTTP/1.0 client request)
1730 * it's a standard violation.
1732 * Anyway, "sort of against the spec" is preferable
1733 * to "always getting confused by Continue responses"
1734 * (Privoxy's behaviour before this hack was added)
1736 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1737 continue_hack_in_da_house = 1;
1739 else if (*header == '\0')
1742 * If the header is empty, but the Continue hack
1743 * isn't active, we can assume that we reached the
1744 * end of the buffer before we hit the end of the
1747 * Inform the caller an let it decide how to handle it.
1749 return JB_ERR_PARSE;
1752 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1755 * XXX: Should we quit the request and return a
1756 * out of memory error page instead?
1758 log_error(LOG_LEVEL_ERROR,
1759 "Out of memory while enlisting server headers. %s lost.",
1769 /*********************************************************************
1771 * Function : crunch_reason
1773 * Description : Translates the crunch reason code into a string.
1776 * 1 : rsp = a http_response
1778 * Returns : A string with the crunch reason or an error description.
1780 *********************************************************************/
1781 static const char *crunch_reason(const struct http_response *rsp)
1783 char * reason = NULL;
1785 assert(rsp != NULL);
1788 return "Internal error while searching for crunch reason";
1791 switch (rsp->reason)
1793 case RSP_REASON_UNSUPPORTED:
1794 reason = "Unsupported HTTP feature";
1796 case RSP_REASON_BLOCKED:
1799 case RSP_REASON_UNTRUSTED:
1800 reason = "Untrusted";
1802 case RSP_REASON_REDIRECTED:
1803 reason = "Redirected";
1805 case RSP_REASON_CGI_CALL:
1806 reason = "CGI Call";
1808 case RSP_REASON_NO_SUCH_DOMAIN:
1809 reason = "DNS failure";
1811 case RSP_REASON_FORWARDING_FAILED:
1812 reason = "Forwarding failed";
1814 case RSP_REASON_CONNECT_FAILED:
1815 reason = "Connection failure";
1817 case RSP_REASON_OUT_OF_MEMORY:
1818 reason = "Out of memory (may mask other reasons)";
1821 reason = "No reason recorded";
1829 /*********************************************************************
1831 * Function : send_crunch_response
1833 * Description : Delivers already prepared response for
1834 * intercepted requests, logs the interception
1835 * and frees the response.
1838 * 1 : csp = Current client state (buffers, headers, etc...)
1839 * 1 : rsp = Fully prepared response. Will be freed on exit.
1841 * Returns : Nothing.
1843 *********************************************************************/
1844 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp)
1846 const struct http_request *http = csp->http;
1847 char status_code[4];
1849 assert(rsp != NULL);
1850 assert(rsp->head != NULL);
1855 * Not supposed to happen. If it does
1856 * anyway, treat it as an unknown error.
1858 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1859 /* return code doesn't matter */
1864 /* If rsp is still NULL, we have serious internal problems. */
1865 log_error(LOG_LEVEL_FATAL,
1866 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1870 * Extract the status code from the actual head
1871 * that was send to the client. It is the only
1872 * way to get it right for all requests, including
1873 * the fixed ones for out-of-memory problems.
1875 * A head starts like this: 'HTTP/1.1 200...'
1879 status_code[0] = rsp->head[9];
1880 status_code[1] = rsp->head[10];
1881 status_code[2] = rsp->head[11];
1882 status_code[3] = '\0';
1884 /* Write the answer to the client */
1885 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1886 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1888 /* There is nothing we can do about it. */
1889 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1892 /* Log that the request was crunched and why. */
1893 log_error(LOG_LEVEL_CRUNCH, "%s: %s", crunch_reason(rsp), http->url);
1894 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %d",
1895 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1897 /* Clean up and return */
1898 if (cgi_error_memory() != rsp)
1900 free_http_response(rsp);
1907 /*********************************************************************
1909 * Function : request_contains_null_bytes
1911 * Description : Checks for NULL bytes in the request and sends
1912 * an error message to the client if any were found.
1914 * XXX: currently not used, see comment in chat().
1917 * 1 : csp = Current client state (buffers, headers, etc...)
1918 * 2 : buf = Data from the client's request to check.
1919 * 3 : len = The data length.
1921 * Returns : TRUE if the request contained one or more NULL bytes, or
1924 *********************************************************************/
1925 static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1927 size_t c_len; /* Request lenght when treated as C string */
1929 c_len = strlen(buf);
1934 * Null byte(s) found. Log the request,
1935 * return an error response and hang up.
1937 size_t tmp_len = c_len;
1942 * Replace NULL byte(s) with '°' characters
1943 * so the request can be logged as string.
1944 * XXX: Is there a better replacement character?
1947 tmp_len += strlen(buf+tmp_len);
1948 } while (tmp_len < len);
1950 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1951 "(length=%d, strlen=%d).", csp->ip_addr_str, len, c_len);
1952 log_error(LOG_LEVEL_HEADER,
1953 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1955 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
1957 /* XXX: Log correct size */
1958 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1968 /*********************************************************************
1970 * Function : crunch_response_triggered
1972 * Description : Checks if the request has to be crunched,
1973 * and delivers the crunch response if necessary.
1976 * 1 : csp = Current client state (buffers, headers, etc...)
1977 * 2 : crunchers = list of cruncher functions to run
1979 * Returns : TRUE if the request was answered with a crunch response
1982 *********************************************************************/
1983 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
1985 struct http_response *rsp = NULL;
1986 const struct cruncher *c;
1989 * If CGI request crunching is disabled,
1990 * check the CGI dispatcher out of order to
1991 * prevent unintentional blocks or redirects.
1993 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
1994 && (NULL != (rsp = dispatch_cgi(csp))))
1996 /* Deliver, log and free the interception response. */
1997 send_crunch_response(csp, rsp);
2001 for (c = crunchers; c->cruncher != NULL; c++)
2004 * Check the cruncher if either Privoxy is toggled
2005 * on and the request isn't forced, or if the cruncher
2006 * applies to forced requests as well.
2008 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
2009 !(csp->flags & CSP_FLAG_FORCED)) ||
2010 (c->flags & CF_IGNORE_FORCE))
2012 rsp = c->cruncher(csp);
2015 /* Deliver, log and free the interception response. */
2016 send_crunch_response(csp, rsp);
2017 #ifdef FEATURE_STATISTICS
2018 if (c->flags & CF_COUNT_AS_REJECT)
2020 csp->flags |= CSP_FLAG_REJECTED;
2022 #endif /* def FEATURE_STATISTICS */
2033 /*********************************************************************
2035 * Function : build_request_line
2037 * Description : Builds the HTTP request line.
2039 * If a HTTP forwarder is used it expects the whole URL,
2040 * web servers only get the path.
2043 * 1 : csp = Current client state (buffers, headers, etc...)
2044 * 2 : fwd = The forwarding spec used for the request
2045 * XXX: Should use http->fwd instead.
2046 * 3 : request_line = The old request line which will be replaced.
2048 * Returns : Nothing. Terminates in case of memory problems.
2050 *********************************************************************/
2051 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
2053 struct http_request *http = csp->http;
2055 assert(http->ssl == 0);
2058 * Downgrade http version from 1.1 to 1.0
2059 * if +downgrade action applies.
2061 if ( (csp->action->flags & ACTION_DOWNGRADE)
2062 && (!strcmpic(http->ver, "HTTP/1.1")))
2065 http->ver = strdup("HTTP/1.0");
2067 if (http->ver == NULL)
2069 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
2074 * Rebuild the request line.
2076 freez(*request_line);
2077 *request_line = strdup(http->gpc);
2078 string_append(request_line, " ");
2080 if (fwd->forward_host)
2082 string_append(request_line, http->url);
2086 string_append(request_line, http->path);
2088 string_append(request_line, " ");
2089 string_append(request_line, http->ver);
2091 if (*request_line == NULL)
2093 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
2095 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
2099 /*********************************************************************
2101 * Function : change_request_destination
2103 * Description : Parse a (rewritten) request line and regenerate
2104 * the http request data.
2107 * 1 : csp = Current client state (buffers, headers, etc...)
2109 * Returns : Forwards the parse_http_request() return code.
2110 * Terminates in case of memory problems.
2112 *********************************************************************/
2113 static jb_err change_request_destination(struct client_state *csp)
2115 struct http_request *http = csp->http;
2118 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
2119 free_http_request(http);
2120 err = parse_http_request(csp->headers->first->str, http);
2121 if (JB_ERR_OK != err)
2123 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
2124 jb_err_to_string(err));
2128 /* XXX: ocmd is a misleading name */
2129 http->ocmd = strdup(http->cmd);
2130 if (http->ocmd == NULL)
2132 log_error(LOG_LEVEL_FATAL,
2133 "Out of memory copying rewritten HTTP request line");
2141 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2142 /*********************************************************************
2144 * Function : server_response_is_complete
2146 * Description : Determines whether we should stop reading
2147 * from the server socket.
2150 * 1 : csp = Current client state (buffers, headers, etc...)
2151 * 2 : content_length = Length of content received so far.
2153 * Returns : TRUE if the response is complete,
2156 *********************************************************************/
2157 static int server_response_is_complete(struct client_state *csp, size_t content_length)
2159 int content_length_known = (csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
2161 if (!strcmpic(csp->http->gpc, "HEAD"))
2164 * "HEAD" implies no body, we are thus expecting
2165 * no content. XXX: incomplete "list" of methods?
2167 csp->expected_content_length = 0;
2168 content_length_known = TRUE;
2171 if (csp->http->status == 304)
2174 * Expect no body. XXX: incomplete "list" of status codes?
2176 csp->expected_content_length = 0;
2177 content_length_known = TRUE;
2180 return (content_length_known && ((0 == csp->expected_content_length)
2181 || (csp->expected_content_length <= content_length)));
2185 /*********************************************************************
2187 * Function : wait_for_alive_connections
2189 * Description : Waits for alive connections to timeout.
2195 *********************************************************************/
2196 static void wait_for_alive_connections()
2198 int connections_alive = close_unusable_connections();
2200 while (0 < connections_alive)
2202 log_error(LOG_LEVEL_CONNECT,
2203 "Waiting for %d connections to timeout.",
2206 connections_alive = close_unusable_connections();
2209 log_error(LOG_LEVEL_CONNECT, "No connections to wait for left.");
2212 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2215 /*********************************************************************
2217 * Function : mark_server_socket_tainted
2219 * Description : Makes sure we don't reuse a server socket
2220 * (if we didn't read everything the server sent
2221 * us reusing the socket would lead to garbage).
2224 * 1 : csp = Current client state (buffers, headers, etc...)
2228 *********************************************************************/
2229 static void mark_server_socket_tainted(struct client_state *csp)
2231 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
2233 log_error(LOG_LEVEL_CONNECT, "Unsetting keep-alive flag.");
2234 csp->flags &= ~CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE;
2238 /*********************************************************************
2240 * Function : get_request_line
2242 * Description : Read the client request line.
2245 * 1 : csp = Current client state (buffers, headers, etc...)
2247 * Returns : Pointer to request line or NULL in case of errors.
2249 *********************************************************************/
2250 static char *get_request_line(struct client_state *csp)
2252 char buf[BUFFER_SIZE];
2253 char *request_line = NULL;
2256 memset(buf, 0, sizeof(buf));
2260 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
2262 log_error(LOG_LEVEL_ERROR,
2263 "Stopped waiting for the request line.");
2264 write_socket(csp->cfd, CONNECTION_TIMEOUT_RESPONSE,
2265 strlen(CONNECTION_TIMEOUT_RESPONSE));
2269 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2271 if (len <= 0) return NULL;
2274 * If there is no memory left for buffering the
2275 * request, there is nothing we can do but hang up
2277 if (add_to_iob(csp, buf, len))
2282 request_line = get_header(csp->iob);
2284 } while ((NULL != request_line) && ('\0' == *request_line));
2286 return request_line;
2291 /*********************************************************************
2293 * Function : receive_client_request
2295 * Description : Read the client's request (more precisely the
2296 * client headers) and answer it if necessary.
2298 * Note that since we're not using select() we could get
2299 * blocked here if a client connected, then didn't say
2303 * 1 : csp = Current client state (buffers, headers, etc...)
2305 * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
2307 *********************************************************************/
2308 static jb_err receive_client_request(struct client_state *csp)
2310 char buf[BUFFER_SIZE];
2313 struct http_request *http;
2317 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
2318 struct list header_list;
2319 struct list *headers = &header_list;
2323 memset(buf, 0, sizeof(buf));
2325 req = get_request_line(csp);
2328 return JB_ERR_PARSE;
2330 assert(*req != '\0');
2332 if (client_protocol_is_unsupported(csp, req))
2334 return JB_ERR_PARSE;
2337 #ifdef FEATURE_FORCE_LOAD
2339 * If this request contains the FORCE_PREFIX and blocks
2340 * aren't enforced, get rid of it and set the force flag.
2342 if (strstr(req, FORCE_PREFIX))
2344 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
2346 log_error(LOG_LEVEL_FORCE,
2347 "Ignored force prefix in request: \"%s\".", req);
2351 strclean(req, FORCE_PREFIX);
2352 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
2353 csp->flags |= CSP_FLAG_FORCED;
2356 #endif /* def FEATURE_FORCE_LOAD */
2358 err = parse_http_request(req, http);
2360 if (JB_ERR_OK != err)
2362 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
2363 /* XXX: Use correct size */
2364 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2365 log_error(LOG_LEVEL_ERROR,
2366 "Couldn't parse request line received from %s: %s",
2367 csp->ip_addr_str, jb_err_to_string(err));
2369 free_http_request(http);
2370 return JB_ERR_PARSE;
2373 /* grab the rest of the client's headers */
2377 p = get_header(csp->iob);
2381 /* There are no additional headers to read. */
2388 * We didn't receive a complete header
2389 * line yet, get the rest of it.
2391 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
2393 log_error(LOG_LEVEL_ERROR,
2394 "Stopped grabbing the client headers.");
2395 return JB_ERR_PARSE;
2398 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2401 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
2402 destroy_list(headers);
2403 return JB_ERR_PARSE;
2406 if (add_to_iob(csp, buf, len))
2409 * If there is no memory left for buffering the
2410 * request, there is nothing we can do but hang up
2412 destroy_list(headers);
2413 return JB_ERR_MEMORY;
2419 * We were able to read a complete
2420 * header and can finaly enlist it.
2427 if (http->host == NULL)
2430 * If we still don't know the request destination,
2431 * the request is invalid or the client uses
2432 * Privoxy without its knowledge.
2434 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
2437 * Our attempts to get the request destination
2438 * elsewhere failed or Privoxy is configured
2439 * to only accept proxy requests.
2441 * An error response has already been send
2442 * and we're done here.
2444 return JB_ERR_PARSE;
2449 * Determine the actions for this URL
2451 #ifdef FEATURE_TOGGLE
2452 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
2454 /* Most compatible set of actions (i.e. none) */
2455 init_current_action(csp->action);
2458 #endif /* ndef FEATURE_TOGGLE */
2460 get_url_actions(csp, http);
2464 * Save a copy of the original request for logging
2466 http->ocmd = strdup(http->cmd);
2467 if (http->ocmd == NULL)
2469 log_error(LOG_LEVEL_FATAL,
2470 "Out of memory copying HTTP request line");
2472 enlist(csp->headers, http->cmd);
2474 /* Append the previously read headers */
2475 list_append_list_unique(csp->headers, headers);
2476 destroy_list(headers);
2483 /*********************************************************************
2485 * Function : parse_client_request
2487 * Description : Parses the client's request and decides what to do
2490 * Note that since we're not using select() we could get
2491 * blocked here if a client connected, then didn't say
2495 * 1 : csp = Current client state (buffers, headers, etc...)
2497 * Returns : JB_ERR_OK or JB_ERR_PARSE
2499 *********************************************************************/
2500 static jb_err parse_client_request(struct client_state *csp)
2502 struct http_request *http = csp->http;
2505 err = sed(csp, FILTER_CLIENT_HEADERS);
2506 if (JB_ERR_OK != err)
2508 /* XXX: Should be handled in sed(). */
2509 assert(err == JB_ERR_PARSE);
2510 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers.");
2512 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2514 /* Check request line for rewrites. */
2515 if ((NULL == csp->headers->first->str)
2516 || (strcmp(http->cmd, csp->headers->first->str) &&
2517 (JB_ERR_OK != change_request_destination(csp))))
2520 * A header filter broke the request line - bail out.
2522 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
2523 /* XXX: Use correct size */
2524 log_error(LOG_LEVEL_CLF,
2525 "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
2526 log_error(LOG_LEVEL_ERROR,
2527 "Invalid request line after applying header filters.");
2528 free_http_request(http);
2530 return JB_ERR_PARSE;
2538 /*********************************************************************
2542 * Description : Once a connection to the client has been accepted,
2543 * this function is called (via serve()) to handle the
2544 * main business of the communication. When this
2545 * function returns, the caller must close the client
2548 * FIXME: chat is nearly thousand lines long.
2552 * 1 : csp = Current client state (buffers, headers, etc...)
2554 * Returns : Nothing.
2556 *********************************************************************/
2557 static void chat(struct client_state *csp)
2559 char buf[BUFFER_SIZE];
2566 int ms_iis5_hack = 0;
2567 size_t byte_count = 0;
2568 int forwarded_connect_retries = 0;
2569 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
2570 const struct forward_spec *fwd;
2571 struct http_request *http;
2572 int len = 0; /* for buffer sizes (and negative error codes) */
2574 /* Function that does the content filtering for the current request */
2575 filter_function_ptr content_filter = NULL;
2577 /* Skeleton for HTTP response, if we should intercept the request */
2578 struct http_response *rsp;
2579 struct timeval timeout;
2581 memset(buf, 0, sizeof(buf));
2582 memset(&timeout, 0, sizeof(timeout));
2583 timeout.tv_sec = csp->config->socket_timeout;
2587 if (receive_client_request(csp) != JB_ERR_OK)
2591 if (parse_client_request(csp) != JB_ERR_OK)
2596 /* decide how to route the HTTP request */
2597 fwd = forward_url(csp, http);
2600 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
2601 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2606 * build the http request to send to the server
2607 * we have to do one of the following:
2609 * create = use the original HTTP request to create a new
2610 * HTTP request that has either the path component
2611 * without the http://domainspec (w/path) or the
2612 * full orininal URL (w/url)
2613 * Note that the path and/or the HTTP version may
2614 * have been altered by now.
2616 * connect = Open a socket to the host:port of the server
2617 * and short-circuit server and client socket.
2619 * pass = Pass the request unchanged if forwarding a CONNECT
2620 * request to a parent proxy. Note that we'll be sending
2621 * the CFAIL message ourselves if connecting to the parent
2622 * fails, but we won't send a CSUCCEED message if it works,
2623 * since that would result in a double message (ours and the
2624 * parent's). After sending the request to the parent, we simply
2627 * here's the matrix:
2630 * +--------+--------+
2632 * 0 | create | connect|
2634 * Forwarding +--------+--------+
2636 * 1 | create | pass |
2638 * +--------+--------+
2642 if (http->ssl && connect_port_is_forbidden(csp))
2644 const char *acceptable_connect_ports =
2645 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
2646 assert(NULL != acceptable_connect_ports);
2647 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
2648 "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
2649 csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
2650 csp->action->flags |= ACTION_BLOCK;
2656 freez(csp->headers->first->str);
2657 build_request_line(csp, fwd, &csp->headers->first->str);
2661 * We have a request. Check if one of the crunchers wants it.
2663 if (crunch_response_triggered(csp, crunchers_all))
2666 * Yes. The client got the crunch response
2667 * and we are done here after cleaning up.
2669 /* XXX: why list_remove_all()? */
2670 list_remove_all(csp->headers);
2675 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2677 if (fwd->forward_host)
2679 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2680 fwd->forward_host, fwd->forward_port, http->hostport);
2684 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2687 /* here we connect to the server, gateway, or the forwarder */
2689 while ((csp->sfd = forwarded_connect(fwd, http, csp))
2690 && (errno == EINVAL)
2691 && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2693 log_error(LOG_LEVEL_ERROR,
2694 "failed request #%u to connect to %s. Trying again.",
2695 forwarded_connect_retries, http->hostport);
2698 if (csp->sfd == JB_INVALID_SOCKET)
2700 if (fwd->type != SOCKS_NONE)
2703 rsp = error_response(csp, "forwarding-failed", errno);
2705 else if (errno == EINVAL)
2707 rsp = error_response(csp, "no-such-domain", errno);
2711 rsp = error_response(csp, "connect-failed", errno);
2712 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2716 /* Write the answer to the client */
2719 send_crunch_response(csp, rsp);
2725 hdr = list_to_text(csp->headers);
2728 /* FIXME Should handle error properly */
2729 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2731 list_remove_all(csp->headers);
2733 if (fwd->forward_host || (http->ssl == 0))
2736 * Write the client's (modified) header to the server
2737 * (along with anything else that may be in the buffer)
2739 if (write_socket(csp->sfd, hdr, strlen(hdr))
2740 || (flush_socket(csp->sfd, csp->iob) < 0))
2742 log_error(LOG_LEVEL_CONNECT,
2743 "write header to: %s failed: %E", http->hostport);
2745 rsp = error_response(csp, "connect-failed", errno);
2748 send_crunch_response(csp, rsp);
2758 * We're running an SSL tunnel and we're not forwarding,
2759 * so just send the "connect succeeded" message to the
2760 * client, flush the rest, and get out of the way.
2762 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
2770 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2772 /* we're finished with the client's header */
2775 maxfd = (csp->cfd > csp->sfd) ? csp->cfd : csp->sfd;
2777 /* pass data between the client and server
2778 * until one or the other shuts down the connection.
2787 * FD_ZERO here seems to point to an errant macro which crashes.
2788 * So do this by hand for now...
2790 memset(&rfds,0x00,sizeof(fd_set));
2794 FD_SET(csp->cfd, &rfds);
2795 FD_SET(csp->sfd, &rfds);
2797 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2798 if ((csp->flags & CSP_FLAG_CHUNKED)
2799 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
2800 && ((csp->iob->eod - csp->iob->cur) >= 5)
2801 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
2803 log_error(LOG_LEVEL_CONNECT,
2804 "Looks like we read the last chunk together with "
2805 "the server headers. We better stop reading.");
2806 byte_count = (size_t)(csp->iob->eod - csp->iob->cur);
2807 csp->expected_content_length = byte_count;
2808 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2810 if (server_body && server_response_is_complete(csp, byte_count))
2812 log_error(LOG_LEVEL_CONNECT,
2813 "Done reading from server. Expected content length: %d. "
2814 "Actual content length: %d. Most recently received: %d.",
2815 csp->expected_content_length, byte_count, len);
2818 * XXX: should not jump around,
2819 * chat() is complicated enough already.
2823 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2825 n = select((int)maxfd+1, &rfds, NULL, NULL, &timeout);
2829 log_error(LOG_LEVEL_ERROR,
2830 "Didn't receive data in time: %s", http->url);
2831 if ((byte_count == 0) && (http->ssl == 0))
2833 write_socket(csp->cfd, CONNECTION_TIMEOUT_RESPONSE,
2834 strlen(CONNECTION_TIMEOUT_RESPONSE));
2836 mark_server_socket_tainted(csp);
2841 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2842 mark_server_socket_tainted(csp);
2847 * This is the body of the browser's request,
2848 * just read and write it.
2850 if (FD_ISSET(csp->cfd, &rfds))
2852 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2856 /* XXX: not sure if this is necessary. */
2857 mark_server_socket_tainted(csp);
2858 break; /* "game over, man" */
2861 if (write_socket(csp->sfd, buf, (size_t)len))
2863 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2864 mark_server_socket_tainted(csp);
2871 * The server wants to talk. It could be the header or the body.
2872 * If `hdr' is null, then it's the header otherwise it's the body.
2873 * FIXME: Does `hdr' really mean `host'? No.
2875 if (FD_ISSET(csp->sfd, &rfds))
2878 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2882 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2884 if (http->ssl && (fwd->forward_host == NULL))
2887 * Just hang up. We already confirmed the client's CONNECT
2888 * request with status code 200 and unencrypted content is
2889 * no longer welcome.
2891 log_error(LOG_LEVEL_ERROR,
2892 "CONNECT already confirmed. Unable to tell the client about the problem.");
2895 else if (byte_count)
2898 * Just hang up. We already transmitted the original headers
2899 * and parts of the original content and therefore missed the
2900 * chance to send an error message (without risking data corruption).
2902 * XXX: we could retry with a fancy range request here.
2904 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2905 "Unable to tell the client about the problem.");
2906 mark_server_socket_tainted(csp);
2910 rsp = error_response(csp, "connect-failed", errno);
2913 send_crunch_response(csp, rsp);
2919 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2920 if (csp->flags & CSP_FLAG_CHUNKED)
2922 if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2924 /* XXX: this is a temporary hack */
2925 log_error(LOG_LEVEL_CONNECT,
2926 "Looks like we reached the end of the last chunk. "
2927 "We better stop reading.");
2928 csp->expected_content_length = byte_count + (size_t)len;
2929 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2933 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2936 * Add a trailing zero to let be able to use string operations.
2937 * XXX: do we still need this with filter_popups gone?
2942 * Normally, this would indicate that we've read
2943 * as much as the server has sent us and we can
2944 * close the client connection. However, Microsoft
2945 * in its wisdom has released IIS/5 with a bug that
2946 * prevents it from sending the trailing \r\n in
2947 * a 302 redirect header (and possibly other headers).
2948 * To work around this if we've haven't parsed
2949 * a full header we'll append a trailing \r\n
2950 * and see if this now generates a valid one.
2952 * This hack shouldn't have any impacts. If we've
2953 * already transmitted the header or if this is a
2954 * SSL connection, then we won't bother with this
2955 * hack. So we only work on partially received
2956 * headers. If we append a \r\n and this still
2957 * doesn't generate a valid header, then we won't
2958 * transmit anything to the client.
2963 if (server_body || http->ssl)
2966 * If we have been buffering up the document,
2967 * now is the time to apply content modification
2968 * and send the result to the client.
2972 p = execute_content_filter(csp, content_filter);
2974 * If the content filter fails, use the original
2975 * buffer and length.
2976 * (see p != NULL ? p : csp->iob->cur below)
2980 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2983 if (JB_ERR_OK != update_server_headers(csp))
2985 log_error(LOG_LEVEL_FATAL,
2986 "Failed to update server headers. after filtering.");
2989 hdr = list_to_text(csp->headers);
2992 /* FIXME Should handle error properly */
2993 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2996 if (write_socket(csp->cfd, hdr, strlen(hdr))
2997 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
2999 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
3002 mark_server_socket_tainted(csp);
3010 break; /* "game over, man" */
3014 * This is NOT the body, so
3015 * Let's pretend the server just sent us a blank line.
3017 snprintf(buf, sizeof(buf), "\r\n");
3018 len = (int)strlen(buf);
3021 * Now, let the normal header parsing algorithm below do its
3022 * job. If it fails, we'll exit instead of continuing.
3029 * If this is an SSL connection or we're in the body
3030 * of the server document, just write it to the client,
3031 * unless we need to buffer the body for later content-filtering
3033 if (server_body || http->ssl)
3038 * If there is no memory left for buffering the content, or the buffer limit
3039 * has been reached, switch to non-filtering mode, i.e. make & write the
3040 * header, flush the iob and buf, and get out of the way.
3042 if (add_to_iob(csp, buf, len))
3047 log_error(LOG_LEVEL_INFO,
3048 "Flushing header and buffers. Stepping back from filtering.");
3050 hdr = list_to_text(csp->headers);
3054 * Memory is too tight to even generate the header.
3055 * Send our static "Out-of-memory" page.
3057 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
3058 rsp = cgi_error_memory();
3059 send_crunch_response(csp, rsp);
3060 mark_server_socket_tainted(csp);
3063 hdrlen = strlen(hdr);
3065 if (write_socket(csp->cfd, hdr, hdrlen)
3066 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
3067 || (write_socket(csp->cfd, buf, (size_t)len)))
3069 log_error(LOG_LEVEL_CONNECT,
3070 "Flush header and buffers to client failed: %E");
3072 mark_server_socket_tainted(csp);
3077 * Reset the byte_count to the amount of bytes
3078 * we just flushed. len will be added a few lines below,
3079 * hdrlen doesn't matter for LOG_LEVEL_CLF.
3081 byte_count = (size_t)flushed;
3083 content_filter = NULL;
3089 if (write_socket(csp->cfd, buf, (size_t)len))
3091 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
3092 mark_server_socket_tainted(csp);
3096 byte_count += (size_t)len;
3101 const char *header_start;
3103 * We're still looking for the end of the server's header.
3104 * Buffer up the data we just read. If that fails, there's
3105 * little we can do but send our static out-of-memory page.
3107 if (add_to_iob(csp, buf, len))
3109 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
3110 rsp = cgi_error_memory();
3111 send_crunch_response(csp, rsp);
3112 mark_server_socket_tainted(csp);
3116 header_start = csp->iob->cur;
3118 /* Convert iob into something sed() can digest */
3119 if (JB_ERR_PARSE == get_server_headers(csp))
3124 * Well, we tried our MS IIS/5 hack and it didn't work.
3125 * The header is incomplete and there isn't anything
3126 * we can do about it.
3128 log_error(LOG_LEVEL_INFO,
3129 "MS IIS5 hack didn't produce valid headers.");
3135 * Since we have to wait for more from the server before
3136 * we can parse the headers we just continue here.
3138 int header_offset = csp->iob->cur - header_start;
3139 assert(csp->iob->cur >= header_start);
3140 byte_count += (size_t)(len - header_offset);
3141 log_error(LOG_LEVEL_CONNECT, "Continuing buffering headers. "
3142 "byte_count: %d. header_offset: %d. len: %d.",
3143 byte_count, header_offset, len);
3148 /* Did we actually get anything? */
3149 if (NULL == csp->headers->first)
3151 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
3152 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3153 write_socket(csp->cfd, NO_SERVER_DATA_RESPONSE, strlen(NO_SERVER_DATA_RESPONSE));
3154 free_http_request(http);
3155 mark_server_socket_tainted(csp);
3159 assert(csp->headers->first->str);
3161 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
3162 strncmpic(csp->headers->first->str, "ICY", 3))
3165 * It doesn't look like a HTTP (or Shoutcast) response:
3166 * tell the client and log the problem.
3168 if (strlen(csp->headers->first->str) > 30)
3170 csp->headers->first->str[30] = '\0';
3172 log_error(LOG_LEVEL_ERROR,
3173 "Invalid server or forwarder response. Starts with: %s",
3174 csp->headers->first->str);
3175 log_error(LOG_LEVEL_CLF,
3176 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3177 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
3178 strlen(INVALID_SERVER_HEADERS_RESPONSE));
3179 free_http_request(http);
3180 mark_server_socket_tainted(csp);
3185 * We have now received the entire server header,
3186 * filter it and send the result to the client
3188 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
3190 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
3192 hdr = list_to_text(csp->headers);
3195 /* FIXME Should handle error properly */
3196 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3199 if (crunch_response_triggered(csp, crunchers_light))
3202 * One of the tags created by a server-header
3203 * tagger triggered a crunch. We already
3204 * delivered the crunch response to the client
3205 * and are done here after cleaning up.
3208 mark_server_socket_tainted(csp);
3211 /* Buffer and pcrs filter this if appropriate. */
3213 if (!http->ssl) /* We talk plaintext */
3215 content_filter = get_filter_function(csp);
3218 * Only write if we're not buffering for content modification
3220 if (!content_filter)
3223 * Write the server's (modified) header to
3224 * the client (along with anything else that
3225 * may be in the buffer)
3228 if (write_socket(csp->cfd, hdr, strlen(hdr))
3229 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
3231 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
3234 * The write failed, so don't bother mentioning it
3235 * to the client... it probably can't hear us anyway.
3238 mark_server_socket_tainted(csp);
3242 byte_count += (size_t)len;
3247 * XXX: the header lenght should probably
3248 * be calculated by get_server_headers().
3250 int header_length = csp->iob->cur - header_start;
3251 assert(csp->iob->cur > header_start);
3252 byte_count += (size_t)(len - header_length);
3255 /* we're finished with the server's header */
3261 * If this was a MS IIS/5 hack then it means the server
3262 * has already closed the connection. Nothing more to read.
3267 log_error(LOG_LEVEL_INFO,
3268 "Closed server connection detected with MS IIS5 hack enabled.");
3274 mark_server_socket_tainted(csp);
3275 return; /* huh? we should never get here */
3278 if (csp->content_length == 0)
3281 * If Privoxy didn't recalculate the Content-Lenght,
3282 * byte_count is still correct.
3284 csp->content_length = byte_count;
3287 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3288 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3289 && (csp->expected_content_length != byte_count))
3291 log_error(LOG_LEVEL_CONNECT,
3292 "Received %d bytes while expecting %d.",
3293 byte_count, csp->expected_content_length);
3294 mark_server_socket_tainted(csp);
3298 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
3299 csp->ip_addr_str, http->ocmd, csp->content_length);
3303 /*********************************************************************
3307 * Description : This is little more than chat. We only "serve" to
3308 * to close any socket that chat may have opened.
3311 * 1 : csp = Current client state (buffers, headers, etc...)
3315 *********************************************************************/
3317 void serve(struct client_state *csp)
3318 #else /* ifndef AMIGA */
3319 static void serve(struct client_state *csp)
3320 #endif /* def AMIGA */
3323 close_socket(csp->cfd);
3325 if (csp->sfd != JB_INVALID_SOCKET)
3327 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3328 static int monitor_thread_running = 0;
3330 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
3331 && (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
3333 remember_connection(csp->sfd, csp->http, forward_url(csp, csp->http));
3334 privoxy_mutex_lock(&connection_reuse_mutex);
3335 if (!monitor_thread_running)
3337 monitor_thread_running = 1;
3338 privoxy_mutex_unlock(&connection_reuse_mutex);
3339 wait_for_alive_connections();
3340 privoxy_mutex_lock(&connection_reuse_mutex);
3341 monitor_thread_running = 0;
3343 privoxy_mutex_unlock(&connection_reuse_mutex);
3347 forget_connection(csp->sfd);
3348 close_socket(csp->sfd);
3351 close_socket(csp->sfd);
3352 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3355 csp->flags &= ~CSP_FLAG_ACTIVE;
3361 /*********************************************************************
3363 * Function : server_thread
3365 * Description : We only exist to call `serve' in a threaded environment.
3368 * 1 : data = Current client state (buffers, headers, etc...)
3370 * Returns : Always 0.
3372 *********************************************************************/
3373 static int32 server_thread(void *data)
3375 serve((struct client_state *) data);
3382 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3383 /*********************************************************************
3387 * Description : Print usage info & exit.
3389 * Parameters : Pointer to argv[0] for identifying ourselves
3393 *********************************************************************/
3394 static void usage(const char *myname)
3396 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
3400 #endif /* defined(unix) */
3403 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
3404 #endif /* defined(unix) */
3405 "[--version] [configfile]\n"
3406 "Aborting\n", myname);
3411 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
3414 #ifdef MUTEX_LOCKS_AVAILABLE
3415 /*********************************************************************
3417 * Function : privoxy_mutex_lock
3419 * Description : Locks a mutex.
3422 * 1 : mutex = The mutex to lock.
3424 * Returns : Void. May exit in case of errors.
3426 *********************************************************************/
3427 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
3429 #ifdef FEATURE_PTHREAD
3430 int err = pthread_mutex_lock(mutex);
3433 if (mutex != &log_mutex)
3435 log_error(LOG_LEVEL_FATAL,
3436 "Mutex locking failed: %s.\n", strerror(err));
3441 EnterCriticalSection(mutex);
3442 #endif /* def FEATURE_PTHREAD */
3446 /*********************************************************************
3448 * Function : privoxy_mutex_unlock
3450 * Description : Unlocks a mutex.
3453 * 1 : mutex = The mutex to unlock.
3455 * Returns : Void. May exit in case of errors.
3457 *********************************************************************/
3458 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
3460 #ifdef FEATURE_PTHREAD
3461 int err = pthread_mutex_unlock(mutex);
3464 if (mutex != &log_mutex)
3466 log_error(LOG_LEVEL_FATAL,
3467 "Mutex unlocking failed: %s.\n", strerror(err));
3472 LeaveCriticalSection(mutex);
3473 #endif /* def FEATURE_PTHREAD */
3477 /*********************************************************************
3479 * Function : privoxy_mutex_init
3481 * Description : Prepares a mutex.
3484 * 1 : mutex = The mutex to initialize.
3486 * Returns : Void. May exit in case of errors.
3488 *********************************************************************/
3489 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
3491 #ifdef FEATURE_PTHREAD
3492 int err = pthread_mutex_init(mutex, 0);
3495 printf("Fatal error. Mutex initialization failed: %s.\n",
3500 InitializeCriticalSection(mutex);
3501 #endif /* def FEATURE_PTHREAD */
3503 #endif /* def MUTEX_LOCKS_AVAILABLE */
3505 /*********************************************************************
3507 * Function : initialize_mutexes
3509 * Description : Prepares mutexes if mutex support is available.
3513 * Returns : Void, exits in case of errors.
3515 *********************************************************************/
3516 static void initialize_mutexes(void)
3518 #ifdef MUTEX_LOCKS_AVAILABLE
3520 * Prepare global mutex semaphores
3522 privoxy_mutex_init(&log_mutex);
3523 privoxy_mutex_init(&log_init_mutex);
3524 privoxy_mutex_init(&connection_reuse_mutex);
3527 * XXX: The assumptions below are a bit naive
3528 * and can cause locks that aren't necessary.
3530 * For example older FreeBSD versions (< 6.x?)
3531 * have no gethostbyname_r, but gethostbyname is
3534 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
3535 privoxy_mutex_init(&resolver_mutex);
3536 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
3538 * XXX: should we use a single mutex for
3539 * localtime() and gmtime() as well?
3541 #ifndef HAVE_GMTIME_R
3542 privoxy_mutex_init(&gmtime_mutex);
3543 #endif /* ndef HAVE_GMTIME_R */
3545 #ifndef HAVE_LOCALTIME_R
3546 privoxy_mutex_init(&localtime_mutex);
3547 #endif /* ndef HAVE_GMTIME_R */
3550 privoxy_mutex_init(&rand_mutex);
3551 #endif /* ndef HAVE_RANDOM */
3552 #endif /* def MUTEX_LOCKS_AVAILABLE */
3556 /*********************************************************************
3560 * Description : Load the config file and start the listen loop.
3561 * This function is a lot more *sane* with the `load_config'
3562 * and `listen_loop' functions; although it stills does
3563 * a *little* too much for my taste.
3566 * 1 : argc = Number of parameters (including $0).
3567 * 2 : argv = Array of (char *)'s to the parameters.
3569 * Returns : 1 if : can't open config file, unrecognized directive,
3570 * stats requested in multi-thread mode, can't open the
3571 * log file, can't open the jar file, listen port is invalid,
3572 * any load fails, and can't bind port.
3574 * Else main never returns, the process must be signaled
3575 * to terminate execution. Or, on Windows, use the
3576 * "File", "Exit" menu option.
3578 *********************************************************************/
3580 int real_main(int argc, const char *argv[])
3582 int main(int argc, const char *argv[])
3586 unsigned int random_seed;
3588 struct passwd *pw = NULL;
3589 struct group *grp = NULL;
3592 char *pre_chroot_nslookup_to_load_resolver = NULL;
3599 #if !defined(_WIN32)
3606 /* Prepare mutexes if supported and necessary. */
3607 initialize_mutexes();
3609 /* Enable logging until further notice. */
3613 * Parse the command line arguments
3615 * XXX: simply printing usage information in case of
3616 * invalid arguments isn't particularly user friendly.
3618 while (++argc_pos < argc)
3621 /* Check to see if the service must be installed or uninstalled */
3622 if (strncmp(argv[argc_pos], "--install", 9) == 0)
3624 const char *pName = argv[argc_pos] + 9;
3627 exit( (install_service(pName)) ? 0 : 1 );
3629 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
3631 const char *pName = argv[argc_pos] + 11;
3634 exit((uninstall_service(pName)) ? 0 : 1);
3636 else if (strcmp(argv[argc_pos], "--service" ) == 0)
3638 bRunAsService = TRUE;
3639 w32_set_service_cwd();
3640 atexit(w32_service_exit_notify);
3643 #endif /* defined(_WIN32) */
3646 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3648 if (strcmp(argv[argc_pos], "--help") == 0)
3653 else if(strcmp(argv[argc_pos], "--version") == 0)
3655 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
3661 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
3666 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
3668 if (++argc_pos == argc) usage(argv[0]);
3669 pidfile = strdup(argv[argc_pos]);
3672 else if (strcmp(argv[argc_pos], "--user" ) == 0)
3674 if (++argc_pos == argc) usage(argv[argc_pos]);
3676 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
3679 if (NULL == (grp = getgrnam(p)))
3681 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
3685 if (NULL == (pw = getpwnam(argv[argc_pos])))
3687 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
3690 if (p != NULL) *--p = '\0';
3693 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
3695 if (++argc_pos == argc) usage(argv[0]);
3696 pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
3699 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
3703 #endif /* defined(unix) */
3705 else if (argc_pos + 1 != argc)
3708 * This is neither the last command line
3709 * option, nor was it recognized before,
3710 * therefore it must be invalid.
3716 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3718 configfile = argv[argc_pos];
3721 } /* -END- while (more arguments) */
3723 show_version(Argv[0]);
3726 if ( *configfile != '/' )
3728 char cwd[BUFFER_SIZE];
3730 size_t abs_file_size;
3732 /* make config-filename absolute here */
3733 if (NULL == getcwd(cwd, sizeof(cwd)))
3735 perror("failed to get current working directory");
3740 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3741 basedir = strdup(cwd);
3743 if (NULL == basedir ||
3744 NULL == (abs_file = malloc(abs_file_size)))
3746 perror("malloc failed");
3749 strlcpy(abs_file, basedir, abs_file_size);
3750 strlcat(abs_file, "/", abs_file_size );
3751 strlcat(abs_file, configfile, abs_file_size);
3752 configfile = abs_file;
3754 #endif /* defined unix */
3758 clients->next = NULL;
3760 /* XXX: factor out initialising after the next stable release. */
3763 #elif defined(_WIN32)
3767 random_seed = (unsigned int)time(NULL);
3769 srandom(random_seed);
3772 #endif /* ifdef HAVE_RANDOM */
3775 * Unix signal handling
3777 * Catch the abort, interrupt and terminate signals for a graceful exit
3778 * Catch the hangup signal so the errlog can be reopened.
3779 * Ignore the broken pipe signals (FIXME: Why?)
3781 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3784 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3785 const int ignored_signals[] = { SIGPIPE, 0 };
3787 for (idx = 0; catched_signals[idx] != 0; idx++)
3789 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3790 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3792 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3793 #endif /* ifdef sun */
3795 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3799 for (idx = 0; ignored_signals[idx] != 0; idx++)
3801 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3803 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3808 #else /* ifdef _WIN32 */
3809 # ifdef _WIN_CONSOLE
3811 * We *are* in a windows console app.
3812 * Print a verbose messages about FAQ's and such
3814 printf("%s", win32_blurb);
3815 # endif /* def _WIN_CONSOLE */
3816 #endif /* def _WIN32 */
3819 /* Initialize the CGI subsystem */
3820 cgi_init_error_messages();
3823 * If runnig on unix and without the --nodaemon
3824 * option, become a daemon. I.e. fork, detach
3825 * from tty and get process group leadership
3838 if ( pid < 0 ) /* error */
3843 else if ( pid != 0 ) /* parent */
3848 * must check for errors
3849 * child died due to missing files aso
3852 wpid = waitpid( pid, &status, WNOHANG );
3861 /* Should be more portable, but not as well tested */
3866 #else /* ndef __FreeBSD__ */
3868 #endif /* ndef __FreeBSD__ */
3869 fd = open("/dev/tty", O_RDONLY);
3872 /* no error check here */
3873 ioctl( fd, TIOCNOTTY,0 );
3878 * stderr (fd 2) will be closed later on, when the
3879 * log file has been parsed.
3886 } /* -END- if (!no_daemon) */
3889 * As soon as we have written the PID file, we can switch
3890 * to the user and group ID indicated by the --user option
3896 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3898 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3902 if (setgroups(1, &grp->gr_gid))
3904 log_error(LOG_LEVEL_FATAL, "setgroups() failed: %E");
3907 else if (initgroups(pw->pw_name, pw->pw_gid))
3909 log_error(LOG_LEVEL_FATAL, "initgroups() failed: %E");
3915 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3917 /* Read the time zone file from /etc before doing chroot. */
3919 if (NULL != pre_chroot_nslookup_to_load_resolver
3920 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3922 /* Initialize resolver library. */
3923 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3925 if (chroot(pw->pw_dir) < 0)
3927 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3931 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3934 if (setuid(pw->pw_uid))
3936 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3940 char putenv_dummy[64];
3942 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3943 if (putenv(putenv_dummy) != 0)
3945 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3948 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3949 if (putenv(putenv_dummy) != 0)
3951 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3957 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3960 #endif /* defined unix */
3963 /* This will be FALSE unless the command line specified --service
3967 /* Yup, so now we must attempt to establish a connection
3968 * with the service dispatcher. This will only work if this
3969 * process was launched by the service control manager to
3970 * actually run as a service. If this isn't the case, i've
3971 * known it take around 30 seconds or so for the call to return.
3974 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3975 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3977 /* Service has run, and at this point is now being stopped, so just return */
3982 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3984 /* An error occurred. Usually it's because --service was wrongly specified
3985 * and we were unable to connect to the Service Control Dispatcher because
3986 * it wasn't expecting us and is therefore not listening.
3988 * For now, just continue below to call the listen_loop function.
3991 #endif /* def _WIN32 */
4001 /*********************************************************************
4003 * Function : bind_port_helper
4005 * Description : Bind the listen port. Handles logging, and aborts
4009 * 1 : config = Privoxy configuration. Specifies port
4012 * Returns : Port that was opened.
4014 *********************************************************************/
4015 static jb_socket bind_port_helper(struct configuration_spec * config)
4020 if (config->haddr == NULL)
4022 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
4027 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
4028 config->hport, config->haddr);
4031 result = bind_port(config->haddr, config->hport, &bfd);
4038 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
4039 "There may be another Privoxy or some other "
4040 "proxy running on port %d",
4041 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
4042 config->hport, config->hport);
4045 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
4046 "The hostname is not resolvable",
4047 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
4050 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
4051 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
4054 /* shouldn't get here */
4055 return JB_INVALID_SOCKET;
4058 config->need_bind = 0;
4065 /* Without this simple workaround we get this compiler warning from _beginthread
4066 * warning C4028: formal parameter 1 different from declaration
4068 void w32_service_listen_loop(void *p)
4072 #endif /* def _WIN32 */
4075 /*********************************************************************
4077 * Function : listen_loop
4079 * Description : bind the listen port and enter a "FOREVER" listening loop.
4085 *********************************************************************/
4086 static void listen_loop(void)
4088 struct client_state *csp = NULL;
4090 struct configuration_spec * config;
4092 config = load_config();
4094 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4096 * XXX: Should be relocated once it no
4097 * longer needs to emit log messages.
4099 initialize_reusable_connections();
4100 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4102 bfd = bind_port_helper(config);
4104 #ifdef FEATURE_GRACEFUL_TERMINATION
4105 while (!g_terminate)
4110 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
4111 while (waitpid(-1, NULL, WNOHANG) > 0)
4113 /* zombie children */
4115 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
4118 * Free data that was used by died threads
4124 * Re-open the errlog after HUP signal
4126 if (received_hup_signal)
4128 if (NULL != config->logfile)
4130 init_error_log(Argv[0], config->logfile);
4132 received_hup_signal = 0;
4136 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
4138 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
4142 csp->flags |= CSP_FLAG_ACTIVE;
4143 csp->sfd = JB_INVALID_SOCKET;
4145 csp->config = config = load_config();
4147 if ( config->need_bind )
4150 * Since we were listening to the "old port", we will not see
4151 * a "listen" param change until the next IJB request. So, at
4152 * least 1 more request must be made for us to find the new
4153 * setting. I am simply closing the old socket and binding the
4156 * Which-ever is correct, we will serve 1 more page via the
4157 * old settings. This should probably be a "show-proxy-args"
4158 * request. This should not be a so common of an operation
4159 * that this will hurt people's feelings.
4164 bfd = bind_port_helper(config);
4167 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
4169 if (!accept_connection(csp, bfd))
4171 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
4184 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
4187 #ifdef FEATURE_TOGGLE
4188 if (global_toggle_state)
4189 #endif /* def FEATURE_TOGGLE */
4191 csp->flags |= CSP_FLAG_TOGGLED_ON;
4194 if (run_loader(csp))
4196 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
4197 /* Never get here - LOG_LEVEL_FATAL causes program exit */
4201 if (block_acl(NULL,csp))
4203 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
4204 close_socket(csp->cfd);
4208 #endif /* def FEATURE_ACL */
4210 /* add it to the list of clients */
4211 csp->next = clients->next;
4212 clients->next = csp;
4214 if (config->multi_threaded)
4218 /* this is a switch () statment in the C preprocessor - ugh */
4219 #undef SELECTED_ONE_OPTION
4221 /* Use Pthreads in preference to native code */
4222 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
4223 #define SELECTED_ONE_OPTION
4225 pthread_t the_thread;
4226 pthread_attr_t attrs;
4228 pthread_attr_init(&attrs);
4229 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
4230 errno = pthread_create(&the_thread, &attrs,
4231 (void * (*)(void *))serve, csp);
4232 child_id = errno ? -1 : 0;
4233 pthread_attr_destroy(&attrs);
4237 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
4238 #define SELECTED_ONE_OPTION
4239 child_id = _beginthread(
4240 (void (*)(void *))serve,
4245 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
4246 #define SELECTED_ONE_OPTION
4247 child_id = _beginthread(
4248 (void(* _Optlink)(void*))serve,
4254 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
4255 #define SELECTED_ONE_OPTION
4257 thread_id tid = spawn_thread
4258 (server_thread, "server", B_NORMAL_PRIORITY, csp);
4260 if ((tid >= 0) && (resume_thread(tid) == B_OK))
4262 child_id = (int) tid;
4271 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
4272 #define SELECTED_ONE_OPTION
4273 csp->cfd = ReleaseSocket(csp->cfd, -1);
4276 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4277 NP_Output, Output(),
4278 NP_CloseOutput, FALSE,
4279 NP_Name, (ULONG)"privoxy child",
4283 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4284 NP_Output, Output(),
4285 NP_CloseOutput, FALSE,
4286 NP_Name, (ULONG)"privoxy child",
4287 NP_StackSize, 200*1024,
4293 ((struct Task *)child_id)->tc_UserData = csp;
4294 Signal((struct Task *)child_id, SIGF_SINGLE);
4299 #if !defined(SELECTED_ONE_OPTION)
4302 /* This block is only needed when using fork().
4303 * When using threads, the server thread was
4304 * created and run by the call to _beginthread().
4306 if (child_id == 0) /* child */
4309 #ifdef FEATURE_TOGGLE
4310 int inherited_toggle_state = global_toggle_state;
4311 #endif /* def FEATURE_TOGGLE */
4316 * If we've been toggled or we've blocked the request, tell Mom
4319 #ifdef FEATURE_TOGGLE
4320 if (inherited_toggle_state != global_toggle_state)
4322 rc |= RC_FLAG_TOGGLED;
4324 #endif /* def FEATURE_TOGGLE */
4326 #ifdef FEATURE_STATISTICS
4327 if (csp->flags & CSP_FLAG_REJECTED)
4329 rc |= RC_FLAG_BLOCKED;
4331 #endif /* ndef FEATURE_STATISTICS */
4335 else if (child_id > 0) /* parent */
4337 /* in a fork()'d environment, the parent's
4338 * copy of the client socket and the CSP
4342 #if !defined(_WIN32) && !defined(__CYGWIN__)
4344 wait( &child_status );
4347 * Evaluate child's return code: If the child has
4348 * - been toggled, toggle ourselves
4349 * - blocked its request, bump up the stats counter
4352 #ifdef FEATURE_TOGGLE
4353 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
4355 global_toggle_state = !global_toggle_state;
4357 #endif /* def FEATURE_TOGGLE */
4359 #ifdef FEATURE_STATISTICS
4361 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
4365 #endif /* def FEATURE_STATISTICS */
4367 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
4368 close_socket(csp->cfd);
4369 csp->flags &= ~CSP_FLAG_ACTIVE;
4373 #undef SELECTED_ONE_OPTION
4374 /* end of cpp switch () */
4376 if (child_id < 0) /* failed */
4378 char buf[BUFFER_SIZE];
4380 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
4382 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
4384 write_socket(csp->cfd, buf, strlen(buf));
4385 close_socket(csp->cfd);
4386 csp->flags &= ~CSP_FLAG_ACTIVE;
4397 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
4399 /* Clean up. Aim: free all memory (no leaks) */
4400 #ifdef FEATURE_GRACEFUL_TERMINATION
4402 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
4404 unload_current_config_file();
4405 unload_current_actions_file();
4406 unload_current_re_filterfile();
4407 #ifdef FEATURE_TRUST
4408 unload_current_trust_file();
4411 if (config->multi_threaded)
4418 } while ((clients->next != NULL) && (--i > 0));
4422 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
4433 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
4434 /* Cleanup - remove taskbar icon etc. */
4439 #endif /* FEATURE_GRACEFUL_TERMINATION */