1 const char jcc_rcs[] = "$Id: jcc.c,v 1.219 2009/01/31 16:08:21 fabiankeil Exp $";
2 /*********************************************************************
4 * File : $Source: /cvsroot/ijbswa/current/jcc.c,v $
6 * Purpose : Main file. Contains main() method, main loop, and
7 * the main connection-handling function.
9 * Copyright : Written by and Copyright (C) 2001-2008 the SourceForge
10 * Privoxy team. http://www.privoxy.org/
12 * Based on the Internet Junkbuster originally written
13 * by and Copyright (C) 1997 Anonymous Coders and
14 * Junkbusters Corporation. http://www.junkbusters.com
16 * This program is free software; you can redistribute it
17 * and/or modify it under the terms of the GNU General
18 * Public License as published by the Free Software
19 * Foundation; either version 2 of the License, or (at
20 * your option) any later version.
22 * This program is distributed in the hope that it will
23 * be useful, but WITHOUT ANY WARRANTY; without even the
24 * implied warranty of MERCHANTABILITY or FITNESS FOR A
25 * PARTICULAR PURPOSE. See the GNU General Public
26 * License for more details.
28 * The GNU General Public License should be included with
29 * this file. If not, you can view it at
30 * http://www.gnu.org/copyleft/gpl.html
31 * or write to the Free Software Foundation, Inc., 59
32 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
36 * Revision 1.219 2009/01/31 16:08:21 fabiankeil
37 * Remove redundant error check in receive_client_request().
39 * Revision 1.218 2009/01/31 12:25:54 fabiankeil
40 * Flatten indentation in receive_client_request().
42 * Revision 1.217 2009/01/07 19:50:09 fabiankeil
43 * - If the socket-timeout has been reached and the client
44 * hasn't received any data yet, send an explanation before
45 * closing the connection.
46 * - In get_request_line(), signal timeouts the right way.
48 * Revision 1.216 2008/12/24 22:13:11 ler762
49 * fix GCC 3.4.4 warning
51 * Revision 1.215 2008/12/24 17:06:19 fabiankeil
52 * Keep a thread around to timeout alive connections
53 * even if no new requests are coming in.
55 * Revision 1.214 2008/12/20 14:53:55 fabiankeil
56 * Add config option socket-timeout to control the time
57 * Privoxy waits for data to arrive on a socket. Useful
58 * in case of stale ssh tunnels or when fuzz-testing.
60 * Revision 1.213 2008/12/15 18:45:51 fabiankeil
61 * When logging crunches, log the whole URL, so one can easily
62 * differentiate between vanilla HTTP and CONNECT requests.
64 * Revision 1.212 2008/12/14 15:46:22 fabiankeil
65 * Give crunched requests their own log level.
67 * Revision 1.211 2008/12/06 10:05:03 fabiankeil
68 * Downgrade "Received x bytes while expecting y." message to
69 * LOG_LEVEL_CONNECT as it doesn't necessarily indicate an error.
71 * Revision 1.210 2008/12/02 22:03:18 fabiankeil
72 * Don't miscalculate byte_count if we don't get all the
73 * server headers with one read_socket() call. With keep-alive
74 * support enabled, this caused delays until the server closed
77 * Revision 1.209 2008/11/27 09:44:04 fabiankeil
78 * Cosmetics for the last commit: Don't watch out for
79 * the last chunk if the content isn't chunk-encoded or
80 * if we already determined the content length previously.
82 * Revision 1.208 2008/11/26 18:24:17 fabiankeil
83 * Recognize that the server response is complete if the
84 * last chunk is read together with the server headers.
87 * Revision 1.207 2008/11/25 17:25:16 fabiankeil
88 * Don't convert the client-header list to text until we need to.
90 * Revision 1.206 2008/11/23 17:00:11 fabiankeil
91 * Some more chat() cosmetics.
93 * Revision 1.205 2008/11/16 12:43:49 fabiankeil
94 * Turn keep-alive support into a runtime feature
95 * that is disabled by setting keep-alive-timeout
96 * to a negative value.
98 * Revision 1.204 2008/11/06 19:42:17 fabiankeil
99 * Fix last-chunk detection hack to also apply
100 * if buf[] contains nothing but the last-chunk.
102 * Revision 1.203 2008/11/06 18:34:35 fabiankeil
103 * Factor receive_client_request() and
104 * parse_client_request() out of chat().
106 * Revision 1.202 2008/11/02 18:40:34 fabiankeil
107 * If we received a different amount of data than we expected,
108 * log a warning and make sure the server socket isn't reused.
110 * Revision 1.201 2008/11/02 16:48:20 fabiankeil
111 * Revert revision 1.195 and try again.
113 * Revision 1.200 2008/10/26 16:53:18 fabiankeil
116 * Revision 1.199 2008/10/26 15:36:10 fabiankeil
117 * Remove two debug messages with LOG_LEVEL_INFO.
119 * Revision 1.198 2008/10/22 15:19:55 fabiankeil
120 * Once More, With Feeling: if there is no logfile
121 * because the user didn't specify one, we shouldn't
122 * call init_error_log() after receiving SIGHUP either.
124 * Revision 1.197 2008/10/20 17:02:40 fabiankeil
125 * If SIGHUP is received while we aren't running in daemon
126 * mode, calling init_error_log() would be a mistake.
128 * Revision 1.196 2008/10/16 09:16:41 fabiankeil
129 * - Fix two gcc44 conversion warnings.
130 * - Don't bother logging the last five bytes
133 * Revision 1.195 2008/10/13 16:04:37 fabiankeil
134 * Make sure we don't try to reuse tainted server sockets.
136 * Revision 1.194 2008/10/12 18:35:18 fabiankeil
137 * The last commit was a bit too ambitious, apparently the content
138 * length adjustment is only necessary if we aren't buffering.
140 * Revision 1.193 2008/10/12 15:57:35 fabiankeil
141 * Fix content length calculation if we read headers
142 * and the start of the body at once. Now that we have
143 * FEATURE_CONNECTION_KEEP_ALIVE, it actually matters.
145 * Revision 1.192 2008/10/11 18:19:14 fabiankeil
146 * Even more chat() cosmetics.
148 * Revision 1.191 2008/10/11 18:00:14 fabiankeil
149 * Reformat some comments in chat().
151 * Revision 1.190 2008/10/11 14:58:00 fabiankeil
152 * In case of chunk-encoded content, stop reading if
153 * the buffer looks like it ends with the last chunk.
155 * Revision 1.189 2008/10/11 09:53:00 fabiankeil
156 * Let server_response_is_complete() deal properly with
157 * content that is neither buffered nor read all at once.
159 * Revision 1.188 2008/10/09 18:21:41 fabiankeil
160 * Flush work-in-progress changes to keep outgoing connections
161 * alive where possible. Incomplete and mostly #ifdef'd out.
163 * Revision 1.187 2008/09/07 12:35:05 fabiankeil
164 * Add mutex lock support for _WIN32.
166 * Revision 1.186 2008/09/04 08:13:58 fabiankeil
167 * Prepare for critical sections on Windows by adding a
168 * layer of indirection before the pthread mutex functions.
170 * Revision 1.185 2008/08/30 12:03:07 fabiankeil
171 * Remove FEATURE_COOKIE_JAR.
173 * Revision 1.184 2008/08/22 15:34:45 fabiankeil
174 * - Silence LLVM/Clang complaint.
175 * - Make received_hup_signal static.
176 * - Hide definitions for basedir, pidfile and received_hup_signal
177 * from __EMX__ as they only seem to be used in case of #ifdef unix.
179 * Revision 1.183 2008/08/21 07:09:35 fabiankeil
180 * Accept Shoutcast responses again. Problem reported
181 * and fix suggested by Stefan in #2062860.
183 * Revision 1.182 2008/06/27 11:13:56 fabiankeil
184 * Fix possible NULL-pointer dereference reported
185 * by din_a4 in #2003937. Pointy hat to me.
187 * Revision 1.181 2008/05/21 15:47:15 fabiankeil
188 * Streamline sed()'s prototype and declare
189 * the header parse and add structures static.
191 * Revision 1.180 2008/05/21 15:26:32 fabiankeil
192 * - Mark csp as immutable for send_crunch_response().
193 * - Fix comment spelling.
195 * Revision 1.179 2008/05/20 20:13:32 fabiankeil
196 * Factor update_server_headers() out of sed(), ditch the
197 * first_run hack and make server_patterns_light static.
199 * Revision 1.178 2008/05/10 13:23:38 fabiankeil
200 * Don't provide get_header() with the whole client state
201 * structure when it only needs access to csp->iob.
203 * Revision 1.177 2008/05/10 11:51:12 fabiankeil
204 * Make the "read the rest of the headers" loop a bit more readable.
206 * Revision 1.176 2008/05/10 11:37:57 fabiankeil
207 * - Instead of logging when the IIS5 hack is enabled, log when it fails.
208 * - Remove useless comment.
210 * Revision 1.175 2008/05/09 18:53:59 fabiankeil
211 * Fix comment grammar.
213 * Revision 1.174 2008/05/07 18:05:53 fabiankeil
214 * Remove the pointless buffer in client_protocol_is_unsupported().
216 * Revision 1.173 2008/05/06 15:09:00 fabiankeil
217 * Least-effort fix for bug #1821930 (reported by Lee):
218 * If the response doesn't look like HTTP,
219 * tell the client and log the problem.
221 * Revision 1.172 2008/04/16 16:38:21 fabiankeil
222 * Don't pass the whole csp structure to flush_socket()
223 * when it only needs a file descriptor and a buffer.
225 * Revision 1.171 2008/03/27 18:27:25 fabiankeil
226 * Remove kill-popups action.
228 * Revision 1.170 2008/03/06 16:33:46 fabiankeil
229 * If limit-connect isn't used, don't limit CONNECT requests to port 443.
231 * Revision 1.169 2008/03/04 18:30:39 fabiankeil
232 * Remove the treat-forbidden-connects-like-blocks action. We now
233 * use the "blocked" page for forbidden CONNECT requests by default.
235 * Revision 1.168 2008/03/02 12:25:25 fabiankeil
236 * Also use shiny new connect_port_is_forbidden() in jcc.c.
238 * Revision 1.167 2008/02/23 16:57:12 fabiankeil
239 * Rename url_actions() to get_url_actions() and let it
240 * use the standard parameter ordering.
242 * Revision 1.166 2008/02/23 16:33:43 fabiankeil
243 * Let forward_url() use the standard parameter ordering
244 * and mark its second parameter immutable.
246 * Revision 1.165 2008/02/02 19:36:56 fabiankeil
247 * Remove the "Listening ... for local connections only" log message.
248 * Whether or not remote connections are able to reach Privoxy is up
249 * to the operating system.
251 * Revision 1.164 2007/12/16 18:32:46 fabiankeil
252 * Prevent the log messages for CONNECT requests to unacceptable
253 * ports from printing the limit-connect argument as [null] if
254 * limit-connect hasn't been explicitly enabled.
256 * Revision 1.163 2007/12/13 01:47:11 david__schmidt
257 * Make sure all console-mode apps get a usage() instance
259 * Revision 1.162 2007/12/06 17:54:57 fabiankeil
260 * Reword NO_SERVER_DATA_RESPONSE to make it harder
261 * to misunderstand what the message is all about.
263 * Revision 1.161 2007/12/04 19:44:22 fabiankeil
264 * Unbreak trustfile which previously didn't work without
265 * FEATURE_TOGGLE. Fixes BR#1843585, reported by Lee.
267 * Revision 1.160 2007/11/29 18:00:29 fabiankeil
268 * Plug memory leak. Spotted by Valgrind, triggered by
269 * Privoxy-Regression-Test feeding proxyfuzz.py.
271 * Revision 1.159 2007/11/24 14:34:09 fabiankeil
272 * In the HTTP snipplets, refer to the client as client.
274 * Revision 1.158 2007/11/11 16:44:17 fabiankeil
275 * Emit a log message when activating the MS IIS5 hack.
277 * Revision 1.157 2007/11/03 17:34:49 fabiankeil
278 * Log the "weak randomization factor" warning only
279 * once for mingw32 and provide some more details.
281 * Revision 1.156 2007/11/01 18:20:58 fabiankeil
282 * Initialize log module after initializing mutexes, future
283 * deadlocks in that code should now work cross-platform.
285 * Revision 1.155 2007/10/23 20:12:45 fabiankeil
286 * Fix first CSUCCEED line to end in \r\n as required by RFC1945.
287 * Reported by Bert van Leeuwen in BR#1818808.
289 * Revision 1.154 2007/10/19 17:00:08 fabiankeil
290 * Downgrade "Flushing header and buffers" message to LOG_LEVEL_INFO.
292 * Revision 1.153 2007/10/14 14:12:41 fabiankeil
293 * When in daemon mode, close stderr after the configuration file has been
294 * parsed the first time. If logfile isn't set, stop logging. Fixes BR#897436.
296 * Revision 1.152 2007/10/04 18:03:34 fabiankeil
297 * - Fix a crash when parsing invalid requests whose first header
298 * is rejected by get_header(). Regression (re?)introduced
299 * in r1.143 by yours truly.
300 * - Move ACTION_VANILLA_WAFER handling into parsers.c's
301 * client_cookie_adder() to make sure send-vanilla-wafer can be
302 * controlled through tags (and thus regression-tested).
304 * Revision 1.151 2007/09/29 10:21:16 fabiankeil
305 * - Move get_filter_function() from jcc.c to filters.c
306 * so the filter functions can be static.
307 * - Don't bother filtering body-less responses.
309 * Revision 1.150 2007/09/28 16:39:29 fabiankeil
310 * Execute content filters through execute_content_filter().
312 * Revision 1.149 2007/09/04 15:08:48 fabiankeil
313 * Initialize req to NULL to make sure it's defined if the
314 * first read_socket() call fails. Reported by icmp30.
316 * Revision 1.148 2007/08/26 16:47:13 fabiankeil
317 * Add Stephen Gildea's --pre-chroot-nslookup patch [#1276666],
318 * extensive comments moved to user manual.
320 * Revision 1.147 2007/08/25 14:42:40 fabiankeil
321 * Don't crash if a broken header filter wiped out the request line.
323 * Revision 1.146 2007/08/20 17:09:32 fabiankeil
324 * Fix byte_count calculation in case of flushes
325 * and don't parse the server headers a second time.
327 * Revision 1.145 2007/08/19 13:13:31 fabiankeil
328 * - If there's a connection problem after we already forwarded
329 * parts of the original content, just hang up. Fixes BR#1776724.
330 * - Fix warnings about unused code on mingw32.
331 * - In case of flushes, calculate the byte count
332 * less incorrectly (I think).
334 * Revision 1.144 2007/08/11 14:43:22 fabiankeil
335 * Add some more prototypes for static functions.
337 * Revision 1.143 2007/08/05 13:58:19 fabiankeil
338 * Comment out request_contains_null_bytes() until it's used again.
340 * Revision 1.142 2007/08/05 13:50:26 fabiankeil
341 * #1763173 from Stefan Huehner: s@const static@static const@
342 * and declare some more functions static.
344 * Revision 1.141 2007/08/04 09:56:23 fabiankeil
345 * - Log rejected CONNECT requests with LOG_LEVEL_INFO
346 * and explain why they were rejected in the first place.
347 * - Fix the LOG_LEVEL_CLF message for crunches of unallowed
348 * CONNECT requests. The request line was missing.
349 * - Add two more XXX reminders as we don't have enough already.
351 * Revision 1.140 2007/07/21 11:51:36 fabiankeil
352 * As Hal noticed, checking dispatch_cgi() as the last cruncher
353 * looks like a bug if CGI requests are blocked unintentionally,
354 * so don't do it unless the user enabled the new config option
355 * "allow-cgi-request-crunching".
357 * Revision 1.139 2007/07/14 07:46:41 fabiankeil
358 * - Allow to rewrite the request destination behind the client's back.
359 * - Turn the weird-looking unconditional for loop that
360 * reads the client request into a conditional while loop.
361 * Move the stuff that only runs once out of the loop.
362 * - Move parts of chat(), server_content_type() and the
363 * necessary stuff to fix BR#1750917 into get_filter_function().
365 * Revision 1.138 2007/06/03 18:45:18 fabiankeil
366 * Temporary workaround for BR#1730105.
368 * Revision 1.137 2007/06/01 18:16:36 fabiankeil
369 * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
370 * deadlocks and crashes on OpenBSD and possibly other OS with neither
371 * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
372 * Thanks to Ralf Horstmann for report and solution.
374 * Revision 1.136 2007/06/01 16:41:11 fabiankeil
375 * Add forward-override{} to change the forwarding settings through
376 * action sections. This is mainly interesting to forward different
377 * clients differently (for example based on User-Agent or request
380 * Revision 1.135 2007/05/24 17:03:50 fabiankeil
381 * - Let usage() mention the --chroot parameter.
382 * - Use read_socket() consistently and always leave
383 * the last buffer byte alone, even in cases where
384 * null termination (currently) doesn't matter.
386 * Revision 1.134 2007/05/16 14:59:46 fabiankeil
387 * - Fix config file loading on Unix if no config file is specified.
388 * Since r1.97 Privoxy would always interpret the last argument as
389 * config file, even if it's a valid command line option.
390 * - Abort in case of unrecognized command line options. Closes #1719696.
391 * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
392 * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
394 * Revision 1.133 2007/05/04 11:23:19 fabiankeil
395 * - Don't rerun crunchers that only depend on the request URL.
396 * - Don't count redirects and CGI requests as "blocked requests".
398 * Revision 1.132 2007/04/25 15:15:17 fabiankeil
399 * Support crunching based on tags created by server-header taggers.
401 * Revision 1.131 2007/04/22 13:24:50 fabiankeil
402 * Make HTTP snippets static (again). Add a Content-Type for those
403 * with content so the browser doesn't guess it based on the URL.
405 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
406 * Move crunching and request line rebuilding out of chat().
408 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
409 * Introduce tags as alternative way to specify which
410 * actions apply to a request. At the moment tags can be
411 * created based on client and server headers.
413 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
414 * Don't CLF-log CONNECT requests twice.
416 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
417 * Log the source address for ACL-related connection drops.
419 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
420 * New config option: enforce-blocks.
422 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
423 * - Move null byte check into separate function.
424 * - Don't confuse the client with error pages
425 * if a CONNECT request was already confirmed.
427 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
428 * Speed up NULL byte escaping and only log the complete
429 * NULL byte requests with header debugging enabled.
431 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
432 * Answer requests that contain NULL bytes with
433 * a custom response instead of waiting for more
434 * data until the client eventually hangs up.
436 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
437 * - Move delivery and logging of crunched responses
438 * from chat() into send_crunch_response().
439 * - Display the reason for generating http_responses.
440 * - Log the content length for LOG_LEVEL_CLF correctly
441 * (still incorrect for some fixed responses).
442 * - Reword an incorrect comment about
443 * treat-forbidden-connects-like-blocks violating
445 * - Add some log messages.
447 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
448 * Move mutex initialization into separate
449 * function and exit in case of errors.
451 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
452 * - Start to reduce chat()'s line count and move
453 * parts of it into separate functions.
454 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
456 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
457 * - Add Proxy-Agent header to HTTP snippets that are
458 * supposed to reach HTTP clients only.
459 * - Made a few CONNECT log messages more descriptive.
460 * - Catch completely empty server responses (as seen
461 * with Tor's fake ".noconnect" top level domain).
462 * - Use shiny new "forwarding-failed" template for socks errors.
464 * Revision 1.118 2007/01/07 07:43:43 joergs
465 * AmigaOS4 support added.
467 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
468 * Added config option accept-intercepted-requests
469 * and disabled it by default.
471 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
472 * Reverted parts of my last commit
473 * to keep error handling working.
475 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
476 * Fixed gcc43 conversion warnings.
478 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
479 * Fix -pedantic ISO C warning about converting
480 * from function pointer to object pointer.
482 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
483 * Silence compiler warning I introduced with my last commit.
485 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
486 * Mutex protect rand() if POSIX threading
487 * is used, warn the user if that's not possible
488 * and stop using it on _WIN32 where it could
491 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
492 * Don't prevent core dumps by catching SIGABRT.
493 * It's rude and makes debugging unreasonable painful.
495 * Revision 1.110 2006/12/13 14:52:53 etresoft
496 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
498 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
499 * Privoxy is now able to run as intercepting
500 * proxy in combination with any packet filter
501 * that does the port redirection. The destination
502 * is extracted from the "Host:" header which
503 * should be available for nearly all requests.
505 * Moved HTTP snipplets into jcc.c.
506 * Added error message for gopher proxy requests.
508 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
509 * Only unlink the pidfile if it's actually used.
511 * Change order of interception checks to make
512 * it possible to block or redirect requests for
515 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
516 * Make pthread mutex locking more generic. Instead of
517 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
518 * and use mutex locking unless there is an _r function
519 * available. Better safe than sorry.
521 * Fixes "./configure --disable-pthread" and should result
522 * in less threading-related problems on pthread-using platforms,
523 * but it still doesn't fix BR#1122404.
525 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
526 * Move pthread.h inclusion from jcc.c to jcc.h.
527 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
529 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
530 * Don't exit after receiving the second SIGHUP on Solaris.
532 * Fixes BR 1052235, but the same problem may exist on other
533 * systems. Once 3.0.6 is out we should use sigset()
534 * where available and see if it breaks anything.
536 * Revision 1.104 2006/09/23 13:26:38 roro
537 * Replace TABs by spaces in source code.
539 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
540 * Fix +redirect{}. Didn't work with -fast-redirects.
542 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
543 * Respond with 400 and a short text message
544 * if the client tries to use Privoxy as FTP proxy.
546 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
547 * Make number of retries in case of forwarded-connect problems
548 * a config file option (forwarded-connect-retries) and use 0 as
551 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
552 * Set random(3) seed.
554 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
555 * Follow the OpenBSD port's lead and protect the resolve
556 * functions on OpenBSD as well.
558 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
559 * --user fix. Only use the user as group if no group is specified.
560 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
562 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
563 * Windows service (re-)integration
567 * --install[:service_name]
568 * --uninstall[:service_name]
571 * They work as follows:
572 * --install will create a service for you and then terminate.
573 * By default the service name will be "privoxy" (without the quotes).
574 * However you can run multiple services if you wish, just by adding
575 * a colon and then a name (no spaces).
577 * --uninstall follows the exact same rules a --install.
579 * --service is used when the program is executed by the service
580 * control manager, and in normal circumstances would never be
581 * used as a command line argument.
583 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
584 * Windows service integration
586 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
587 * Incorporate Fabian Keil's patch work:
588 http://www.fabiankeil.de/sourcecode/privoxy/
590 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
591 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
592 * with what was really the latest development (the v_3_0_branch branch)
594 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
595 * Thanks to Jindrich Makovicka for a race condition fix for the log
596 * file. The race condition remains for non-pthread implementations.
597 * Reference patch #1175720.
599 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
600 * Add the ability to check jpeg images for invalid
601 * lengths of comment blocks. Defensive strategy
602 * against the exploit:
603 * Microsoft Security Bulletin MS04-028
604 * Buffer Overrun in JPEG Processing (GDI+) Could
605 * Allow Code Execution (833987)
606 * Enabled with +inspect-jpegs in actions files.
608 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
609 * - Fixed usage info for non-unix platforms
610 * - Fixed small cmdline parsing bug
612 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
613 * Diagnostics: Now preserve the returncode of pthread_create
614 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
616 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
617 * No longer ignore SIGCHLD. Fixes bug #769381
619 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
620 * Close jarfile on graceful exit, remove stray line
622 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
623 * Cosmetics: Killed a warning, a typo and an allocation left at exit
625 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
626 * No longer rely on non-POSIX.1 extensions of getcwd().
629 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
630 * Replaced setenv() by posix-compliant putenv()
631 * Thanks to Neil McCalden (nmcc AT users.sf.net).
633 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
634 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
636 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
637 * Clean-up and extension of improvements for forked mode:
638 * - Child's return code now consists of flags RC_FLAG_*
639 * - Reporting toggle to parent now properly #ifdef'ed
640 * - Children now report blocking to parent. This enables
641 * statistics in forked mode
643 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
644 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
645 * Children now report having been toggled through _exit(17), parents
646 * watch for that code and toggle themselves if found.
648 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
649 * Wrapping all *_r functions (the non-_r versions of them) with
650 * mutex semaphores for OSX. Hopefully this will take care of all
651 * of those pesky crash reports.
653 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
654 * Fixed two mostly harmless mem leaks
656 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
657 * Fix: Head of global clients list now initialized to NULL
659 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
660 * Added basic support for OPTIONS and TRACE HTTP methods:
661 * - New interceptor direct_response() added in chat().
662 * - sed() moved to earlier in the process, so that the
663 * Host: header is evaluated before actions and forwarding
666 * Revision 1.92 2002/05/08 16:00:46 oes
667 * Chat's buffer handling:
668 * - Fixed bug with unchecked out-of-mem conditions
669 * while reading client request & server headers
670 * - No longer predict if the buffer limit will be exceeded
671 * in the next read -- check add_to_iob's new
672 * return code. If buffer couldn't be extended
673 * (policy or out-of-mem) while
674 * - reading from client: abort
675 * - reading server headers: send error page
676 * - buffering server body for filter: flush,
677 * and if that fails: send error page
679 * Revision 1.91 2002/04/08 20:35:58 swa
682 * Revision 1.90 2002/04/02 14:57:28 oes
683 * Made sending wafers independent of FEATURE_COOKIE_JAR
685 * Revision 1.89 2002/03/31 17:18:59 jongfoster
686 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
688 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
689 * More compiler warning message maintenance
691 * Revision 1.87 2002/03/26 22:29:54 swa
692 * we have a new homepage!
694 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
695 * Workaround for closing the jarfile before load_config() comes around again
697 * Revision 1.85 2002/03/24 15:23:33 jongfoster
700 * Revision 1.84 2002/03/24 13:25:43 swa
701 * name change related issues
703 * Revision 1.83 2002/03/16 23:54:06 jongfoster
704 * Adding graceful termination feature, to help look for memory leaks.
705 * If you enable this (which, by design, has to be done by hand
706 * editing config.h) and then go to http://i.j.b/die, then the program
707 * will exit cleanly after the *next* request. It should free all the
708 * memory that was used.
710 * Revision 1.82 2002/03/13 00:27:05 jongfoster
713 * Revision 1.81 2002/03/12 01:42:50 oes
714 * Introduced modular filters
716 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
717 * OS/2 port maintenance:
718 * - Fixed EMX build - it had decayed a little
719 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
720 * substituted a memset for now.
722 * Revision 1.79 2002/03/09 20:03:52 jongfoster
723 * - Making various functions return int rather than size_t.
724 * (Undoing a recent change). Since size_t is unsigned on
725 * Windows, functions like read_socket that return -1 on
726 * error cannot return a size_t.
728 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
729 * crashes, and also frequently caused JB to jump to 100%
730 * CPU and stay there. (Because it thought it had just
731 * read ((unsigned)-1) == 4Gb of data...)
733 * - The signature of write_socket has changed, it now simply
734 * returns success=0/failure=nonzero.
736 * - Trying to get rid of a few warnings --with-debug on
737 * Windows, I've introduced a new type "jb_socket". This is
738 * used for the socket file descriptors. On Windows, this
739 * is SOCKET (a typedef for unsigned). Everywhere else, it's
740 * an int. The error value can't be -1 any more, so it's
741 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
742 * Windows it maps to the #define INVALID_SOCKET.)
744 * - The signature of bind_port has changed.
746 * Revision 1.78 2002/03/08 21:35:04 oes
747 * Added optional group supplement to --user option. Will now use default group of user if no group given
749 * Revision 1.77 2002/03/07 03:52:06 oes
750 * - Fixed compiler warnings etc
751 * - Improved handling of failed DNS lookups
753 * Revision 1.76 2002/03/06 22:54:35 jongfoster
754 * Automated function-comment nitpicking.
756 * Revision 1.75 2002/03/06 10:02:19 oes
757 * Fixed stupid bug when --user was not given
759 * Revision 1.74 2002/03/06 00:49:31 jongfoster
760 * Fixing warning on Windows
761 * Making #ifdefs that refer to the same variable consistently
762 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
764 * Revision 1.73 2002/03/05 23:57:30 hal9
765 * Stray character 's' on line 1618 was breaking build.
767 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
768 * - Re-enable OS/2 building after new parms were added
769 * - Fix false out of memory report when resolving CGI templates when no IP
770 * address is available of failed attempt (a la no such domain)
772 * Revision 1.71 2002/03/05 18:13:56 oes
773 * Added --user option
775 * Revision 1.70 2002/03/05 04:52:42 oes
776 * Deleted non-errlog debugging code
778 * Revision 1.69 2002/03/04 23:50:00 jongfoster
779 * Splitting off bind_port() call into bind_port_helper(), with
782 * Revision 1.68 2002/03/04 20:17:32 oes
785 * Revision 1.67 2002/03/04 18:18:57 oes
786 * - Removed _DEBUG mode
787 * - Cleand up cmdline parsing
788 * - Introduced --no-daemon, --pidfile options
789 * - Cleaned up signal handling:
790 * - Terminate cleanly on INT, TERM and ABRT
791 * - Schedule logfile for re-opening on HUP
792 * - Ignore CHLD and PIPE
793 * - Leave the rest with their default handlers
794 * - Uniform handler registration
795 * - Added usage() function
796 * - Played styleguide police
798 * Revision 1.66 2002/03/03 15:06:55 oes
799 * Re-enabled automatic config reloading
801 * Revision 1.65 2002/03/03 14:49:11 oes
802 * Fixed CLF logging: Now uses client's original HTTP request
804 * Revision 1.64 2002/03/03 09:18:03 joergs
805 * Made jumbjuster work on AmigaOS again.
807 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
808 * Clean up a little CRLF unpleasantness that suddenly appeared
810 * Revision 1.62 2002/02/20 23:17:23 jongfoster
811 * Detecting some out-of memory conditions and exiting with a log message.
813 * Revision 1.61 2002/01/17 21:01:52 jongfoster
814 * Moving all our URL and URL pattern parsing code to urlmatch.c.
816 * Revision 1.60 2001/12/30 14:07:32 steudten
817 * - Add signal handling (unix)
818 * - Add SIGHUP handler (unix)
819 * - Add creation of pidfile (unix)
820 * - Add action 'top' in rc file (RH)
821 * - Add entry 'SIGNALS' to manpage
822 * - Add exit message to logfile (unix)
824 * Revision 1.59 2001/12/13 14:07:18 oes
825 * Fixed Bug: 503 error page now sent OK
827 * Revision 1.58 2001/11/30 23:37:24 jongfoster
828 * Renaming the Win32 config file to config.txt - this is almost the
829 * same as the corresponding UNIX name "config"
831 * Revision 1.57 2001/11/16 00:47:43 jongfoster
832 * Changing the tty-disconnection code to use setsid().
834 * Revision 1.56 2001/11/13 20:20:54 jongfoster
835 * Tabs->spaces, fixing a bug with missing {} around an if()
837 * Revision 1.55 2001/11/13 20:14:53 jongfoster
838 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
840 * Revision 1.54 2001/11/07 00:03:14 steudten
841 * Give reliable return value if an error
842 * occurs not just 0 with new daemon mode.
844 * Revision 1.53 2001/11/05 21:41:43 steudten
845 * Add changes to be a real daemon just for unix os.
846 * (change cwd to /, detach from controlling tty, set
847 * process group and session leader to the own process.
849 * Add some fatal-error log message for failed malloc().
850 * Add '-d' if compiled with 'configure --with-debug' to
851 * enable debug output.
853 * Revision 1.52 2001/10/26 20:11:20 jongfoster
854 * Fixing type mismatch
856 * Revision 1.51 2001/10/26 17:38:28 oes
859 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
860 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
861 * threads to call select() simultaneously. So, it's time to do a real, live,
862 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
863 * (native). Both versions will work, but using __OS2__ offers multi-threading.
865 * Revision 1.49 2001/10/23 21:41:35 jongfoster
866 * Added call to initialize the (statically-allocated of course)
867 * "out of memory" CGI response.
869 * Revision 1.48 2001/10/10 19:56:46 jongfoster
870 * Moving some code that wasn't cookie-related out of an #ifdef
873 * Revision 1.47 2001/10/10 16:44:36 oes
874 * Added CONNECT destination port limitation check
876 * Revision 1.46 2001/10/08 15:17:41 oes
877 * Re-enabled SSL forwarding
879 * Revision 1.45 2001/10/07 15:42:11 oes
880 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
882 * Moved downgrading of the HTTP version from parse_http_request to
883 * chat(), since we can't decide if it is necessary before we have
884 * determined the actions for the URL. The HTTP command is now
885 * *always* re-built so the repairs need no longer be special-cased.
887 * filter_popups now gets a csp pointer so it can raise the new
888 * CSP_FLAG_MODIFIED flag.
892 * Added configurable size limit for the IOB. If the IOB grows so
893 * large that the next read would exceed the limit, the header
894 * is generated, and the header & unfiltered buffer are flushed
895 * to the client. Chat then continues in non-buffering,
896 * non-filtering body mode.
898 * Revision 1.44 2001/10/02 18:13:57 oes
901 * Revision 1.43 2001/10/02 15:32:13 oes
902 * Moved generation of hdr
904 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
905 * Cleaning up 2 compiler warnings on OS/2.
907 * Revision 1.41 2001/09/16 17:05:14 jongfoster
908 * Removing unused #include showarg.h
910 * Revision 1.40 2001/09/16 15:41:45 jongfoster
911 * Fixing signed/unsigned comparison warning.
913 * Revision 1.39 2001/09/16 13:21:27 jongfoster
914 * Changes to use new list functions.
916 * Revision 1.38 2001/09/16 13:01:46 jongfoster
917 * Removing redundant function call that zeroed zalloc()'d memory.
919 * Revision 1.37 2001/09/10 11:12:24 oes
920 * Deleted unused variable
922 * Revision 1.36 2001/09/10 10:56:15 oes
923 * Silenced compiler warnings
925 * Revision 1.35 2001/07/31 14:44:22 oes
926 * Deleted unused size parameter from filter_popups()
928 * Revision 1.34 2001/07/30 22:08:36 jongfoster
929 * Tidying up #defines:
930 * - All feature #defines are now of the form FEATURE_xxx
931 * - Permanently turned off WIN_GUI_EDIT
932 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
934 * Revision 1.33 2001/07/29 19:32:00 jongfoster
935 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
937 * Revision 1.32 2001/07/29 18:47:05 jongfoster
938 * Adding missing #include "loadcfg.h"
940 * Revision 1.31 2001/07/29 12:17:48 oes
941 * Applied pthread fix by Paul Lieverse
943 * Revision 1.30 2001/07/25 22:57:13 jongfoster
944 * __BEOS__ no longer overrides FEATURE_PTHREAD.
945 * This is because FEATURE_PTHREAD will soon be widely used, so I
946 * want to keep it simple.
948 * Revision 1.29 2001/07/24 12:47:06 oes
949 * Applied BeOS support update by Eugenia
951 * Revision 1.28 2001/07/23 13:26:12 oes
952 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
954 * Revision 1.27 2001/07/19 19:09:47 haroon
955 * - Added code to take care of the situation where while processing the first
956 * server response (which includes the server header), after finding the end
957 * of the headers we were not looking past the end of the headers for
958 * content modification. I enabled it for filter_popups.
959 * Someone else should look to see if other similar operations should be
960 * done to the discarded portion of the buffer.
962 * Note 2001/07/20: No, the other content modification mechanisms will process
963 * the whole iob later anyway. --oes
965 * Revision 1.26 2001/07/18 12:31:36 oes
968 * Revision 1.25 2001/07/15 19:43:49 jongfoster
969 * Supports POSIX threads.
970 * Also removed some unused #includes.
972 * Revision 1.24 2001/07/13 14:00:40 oes
973 * - Generic content modification scheme:
974 * Each feature has its own applicability flag that is set
975 * from csp->action->flags.
976 * Replaced the "filtering" int flag , by a function pointer
977 * "content_filter" to the function that will do the content
978 * modification. If it is != NULL, the document will be buffered
979 * and processed through *content_filter, which must set
980 * csp->content_length and return a modified copy of the body
981 * or return NULL (on failiure).
982 * - Changed csp->is_text to the more generic bitmap csp->content_type
983 * which can currently take the valued CT_TEXT or CT_GIF
985 * - Removed all #ifdef PCRS
987 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
988 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
989 * the `block_acl' call. This prevents a compilation error when the user
990 * does not wish to use the "ACL" feature.
992 * Revision 1.22 2001/06/29 21:45:41 oes
993 * Indentation, CRLF->LF, Tab-> Space
995 * Revision 1.21 2001/06/29 13:29:36 oes
996 * - Cleaned up, improved comments
997 * - Unified all possible interceptors (CGI,
998 * block, trust, fast_redirect) in one
999 * place, with one (CGI) answer generation
1000 * mechansim. Much clearer now.
1001 * - Removed the GIF image generation, which
1002 * is now done in filters.c:block_url()
1003 * - Made error conditions like domain lookup
1004 * failiure or (various) problems while talking
1005 * to the server use cgi.c:error_response()
1006 * instead of generating HTML/HTTP in chat() (yuck!)
1007 * - Removed logentry from cancelled commit
1009 * Revision 1.20 2001/06/09 10:55:28 jongfoster
1010 * Changing BUFSIZ ==> BUFFER_SIZE
1012 * Revision 1.19 2001/06/07 23:12:52 jongfoster
1013 * Replacing function pointer in struct gateway with a directly
1014 * called function forwarded_connect().
1015 * Replacing struct gateway with struct forward_spec
1017 * Revision 1.18 2001/06/03 19:12:16 oes
1018 * introduced new cgi handling
1020 * Revision 1.17 2001/06/01 20:07:23 jongfoster
1021 * Now uses action +image-blocker{} rather than config->tinygif
1023 * Revision 1.16 2001/06/01 18:49:17 jongfoster
1024 * Replaced "list_share" with "list" - the tiny memory gain was not
1025 * worth the extra complexity.
1027 * Revision 1.15 2001/05/31 21:24:47 jongfoster
1028 * Changed "permission" to "action" throughout.
1029 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
1030 * Moved vanilla wafer check into chat(), since we must now
1031 * decide whether or not to add it based on the URL.
1033 * Revision 1.14 2001/05/29 20:14:01 joergs
1034 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
1037 * Revision 1.13 2001/05/29 09:50:24 jongfoster
1038 * Unified blocklist/imagelist/permissionslist.
1039 * File format is still under discussion, but the internal changes
1040 * are (mostly) done.
1042 * Also modified interceptor behaviour:
1043 * - We now intercept all URLs beginning with one of the following
1044 * prefixes (and *only* these prefixes):
1046 * * http://ijbswa.sf.net/config/
1047 * * http://ijbswa.sourceforge.net/config/
1048 * - New interceptors "home page" - go to http://i.j.b/ to see it.
1049 * - Internal changes so that intercepted and fast redirect pages
1050 * are not replaced with an image.
1051 * - Interceptors now have the option to send a binary page direct
1052 * to the client. (i.e. ijb-send-banner uses this)
1053 * - Implemented show-url-info interceptor. (Which is why I needed
1054 * the above interceptors changes - a typical URL is
1055 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
1056 * The previous mechanism would not have intercepted that, and
1057 * if it had been intercepted then it then it would have replaced
1058 * it with an image.)
1060 * Revision 1.12 2001/05/27 22:17:04 oes
1062 * - re_process_buffer no longer writes the modified buffer
1063 * to the client, which was very ugly. It now returns the
1064 * buffer, which it is then written by chat.
1066 * - content_length now adjusts the Content-Length: header
1067 * for modified documents rather than crunch()ing it.
1068 * (Length info in csp->content_length, which is 0 for
1069 * unmodified documents)
1071 * - For this to work, sed() is called twice when filtering.
1073 * Revision 1.11 2001/05/26 17:27:53 jongfoster
1074 * Added support for CLF and fixed LOG_LEVEL_LOG.
1075 * Also did CRLF->LF fix of my previous patch.
1077 * Revision 1.10 2001/05/26 15:26:15 jongfoster
1078 * ACL feature now provides more security by immediately dropping
1079 * connections from untrusted hosts.
1081 * Revision 1.9 2001/05/26 00:28:36 jongfoster
1082 * Automatic reloading of config file.
1083 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
1084 * Most of the global variables have been moved to a new
1085 * struct configuration_spec, accessed through csp->config->globalname
1086 * Most of the globals remaining are used by the Win32 GUI.
1088 * Revision 1.8 2001/05/25 22:43:18 jongfoster
1089 * Fixing minor memory leak and buffer overflow.
1091 * Revision 1.7 2001/05/25 22:34:30 jongfoster
1094 * Revision 1.6 2001/05/23 00:13:58 joergs
1095 * AmigaOS support fixed.
1097 * Revision 1.5 2001/05/22 18:46:04 oes
1099 * - Enabled filtering banners by size rather than URL
1100 * by adding patterns that replace all standard banner
1101 * sizes with the "Junkbuster" gif to the re_filterfile
1103 * - Enabled filtering WebBugs by providing a pattern
1104 * which kills all 1x1 images
1106 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
1107 * which is selected by the (nonstandard and therefore
1108 * capital) letter 'U' in the option string.
1109 * It causes the quantifiers to be ungreedy by default.
1110 * Appending a ? turns back to greedy (!).
1112 * - Added a new interceptor ijb-send-banner, which
1113 * sends back the "Junkbuster" gif. Without imagelist or
1114 * MSIE detection support, or if tinygif = 1, or the
1115 * URL isn't recognized as an imageurl, a lame HTML
1116 * explanation is sent instead.
1118 * - Added new feature, which permits blocking remote
1119 * script redirects and firing back a local redirect
1121 * The feature is conditionally compiled, i.e. it
1122 * can be disabled with --disable-fast-redirects,
1123 * plus it must be activated by a "fast-redirects"
1124 * line in the config file, has its own log level
1125 * and of course wants to be displayed by show-proxy-args
1126 * Note: Boy, all the #ifdefs in 1001 locations and
1127 * all the fumbling with configure.in and acconfig.h
1128 * were *way* more work than the feature itself :-(
1130 * - Because a generic redirect template was needed for
1131 * this, tinygif = 3 now uses the same.
1133 * - Moved GIFs, and other static HTTP response templates
1136 * - Some minor fixes
1138 * - Removed some >400 CRs again (Jon, you really worked
1141 * Revision 1.4 2001/05/21 19:34:01 jongfoster
1142 * Made failure to bind() a fatal error.
1144 * Revision 1.3 2001/05/20 01:21:20 jongfoster
1145 * Version 2.9.4 checkin.
1146 * - Merged popupfile and cookiefile, and added control over PCRS
1147 * filtering, in new "permissionsfile".
1148 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
1149 * file error you now get a message box (in the Win32 GUI) rather
1150 * than the program exiting with no explanation.
1151 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
1153 * - Removed tabs from "config"
1154 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
1155 * - Bumped up version number.
1157 * Revision 1.2 2001/05/17 22:34:44 oes
1158 * - Added hint on GIF char array generation to jcc.c
1159 * - Cleaned CRLF's from the sources and related files
1160 * - Repaired logging for REF and FRC
1162 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
1163 * Initial import of version 2.9.3 source tree
1166 *********************************************************************/
1172 #include <sys/types.h>
1181 # ifndef FEATURE_PTHREAD
1185 # include <windows.h>
1186 # include <process.h>
1187 # endif /* ndef FEATURE_PTHREAD */
1190 # ifndef _WIN_CONSOLE
1191 # include "w32log.h"
1192 # endif /* ndef _WIN_CONSOLE */
1193 # include "w32svrapi.h"
1195 #else /* ifndef _WIN32 */
1197 # if !defined (__OS2__)
1198 # include <unistd.h>
1199 # include <sys/wait.h>
1200 # endif /* ndef __OS2__ */
1201 # include <sys/time.h>
1202 # include <sys/stat.h>
1203 # include <sys/ioctl.h>
1206 #include <sys/termios.h>
1214 # include <signal.h>
1217 # include <socket.h> /* BeOS has select() for sockets only. */
1218 # include <OS.h> /* declarations for threads and stuff. */
1221 # if defined(__EMX__) || defined(__OS2__)
1222 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
1227 #define bzero(B,N) memset(B,0x00,n)
1231 # include <select.h>
1236 #include "project.h"
1239 #include "filters.h"
1240 #include "loaders.h"
1241 #include "parsers.h"
1242 #include "miscutil.h"
1244 #include "jbsockets.h"
1245 #include "gateway.h"
1246 #include "actions.h"
1248 #include "loadcfg.h"
1249 #include "urlmatch.h"
1251 const char jcc_h_rcs[] = JCC_H_VERSION;
1252 const char project_h_rcs[] = PROJECT_H_VERSION;
1255 struct client_state clients[1];
1256 struct file_list files[1];
1258 #ifdef FEATURE_STATISTICS
1259 int urls_read = 0; /* total nr of urls read inc rejected */
1260 int urls_rejected = 0; /* total nr of urls rejected */
1261 #endif /* def FEATURE_STATISTICS */
1263 #ifdef FEATURE_GRACEFUL_TERMINATION
1264 int g_terminate = 0;
1267 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1268 static void sig_handler(int the_signal);
1270 static int client_protocol_is_unsupported(const struct client_state *csp, char *req);
1271 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
1272 static jb_err get_server_headers(struct client_state *csp);
1273 static const char *crunch_reason(const struct http_response *rsp);
1274 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp);
1275 static char *get_request_line(struct client_state *csp);
1276 static jb_err receive_client_request(struct client_state *csp);
1277 static jb_err parse_client_request(struct client_state *csp);
1278 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
1279 static jb_err change_request_destination(struct client_state *csp);
1280 static void chat(struct client_state *csp);
1281 static void serve(struct client_state *csp);
1282 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1283 static void usage(const char *myname);
1285 static void initialize_mutexes(void);
1286 static jb_socket bind_port_helper(struct configuration_spec *config);
1287 static void listen_loop(void);
1290 void serve(struct client_state *csp);
1291 #else /* ifndef AMIGA */
1292 static void serve(struct client_state *csp);
1293 #endif /* def AMIGA */
1296 static int32 server_thread(void *data);
1297 #endif /* def __BEOS__ */
1300 #define sleep(N) Sleep(((N) * 1000))
1304 #define sleep(N) DosSleep(((N) * 100))
1307 #ifdef MUTEX_LOCKS_AVAILABLE
1309 * XXX: Does the locking stuff really belong in this file?
1311 privoxy_mutex_t log_mutex;
1312 privoxy_mutex_t log_init_mutex;
1313 privoxy_mutex_t connection_reuse_mutex;
1315 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
1316 privoxy_mutex_t resolver_mutex;
1317 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
1319 #ifndef HAVE_GMTIME_R
1320 privoxy_mutex_t gmtime_mutex;
1321 #endif /* ndef HAVE_GMTIME_R */
1323 #ifndef HAVE_LOCALTIME_R
1324 privoxy_mutex_t localtime_mutex;
1325 #endif /* ndef HAVE_GMTIME_R */
1328 privoxy_mutex_t rand_mutex;
1329 #endif /* ndef HAVE_RANDOM */
1331 #endif /* def MUTEX_LOCKS_AVAILABLE */
1334 const char *basedir = NULL;
1335 const char *pidfile = NULL;
1336 static int received_hup_signal = 0;
1337 #endif /* defined unix */
1339 /* HTTP snipplets. */
1340 static const char CSUCCEED[] =
1341 "HTTP/1.0 200 Connection established\r\n"
1342 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
1344 static const char CHEADER[] =
1345 "HTTP/1.0 400 Invalid header received from client\r\n"
1346 "Proxy-Agent: Privoxy " VERSION "\r\n"
1347 "Content-Type: text/plain\r\n"
1348 "Connection: close\r\n\r\n"
1349 "Invalid header received from client.\r\n";
1351 static const char FTP_RESPONSE[] =
1352 "HTTP/1.0 400 Invalid request received from client\r\n"
1353 "Content-Type: text/plain\r\n"
1354 "Connection: close\r\n\r\n"
1355 "Invalid request. Privoxy doesn't support FTP.\r\n";
1357 static const char GOPHER_RESPONSE[] =
1358 "HTTP/1.0 400 Invalid request received from client\r\n"
1359 "Content-Type: text/plain\r\n"
1360 "Connection: close\r\n\r\n"
1361 "Invalid request. Privoxy doesn't support gopher.\r\n";
1363 /* XXX: should be a template */
1364 static const char MISSING_DESTINATION_RESPONSE[] =
1365 "HTTP/1.0 400 Bad request received from client\r\n"
1366 "Proxy-Agent: Privoxy " VERSION "\r\n"
1367 "Content-Type: text/plain\r\n"
1368 "Connection: close\r\n\r\n"
1369 "Bad request. Privoxy was unable to extract the destination.\r\n";
1371 /* XXX: should be a template */
1372 static const char NO_SERVER_DATA_RESPONSE[] =
1373 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1374 "Proxy-Agent: Privoxy " VERSION "\r\n"
1375 "Content-Type: text/plain\r\n"
1376 "Connection: close\r\n\r\n"
1377 "Empty server or forwarder response.\r\n"
1378 "The connection has been closed but Privoxy didn't receive any data.\r\n";
1380 /* XXX: should be a template */
1381 static const char INVALID_SERVER_HEADERS_RESPONSE[] =
1382 "HTTP/1.0 502 Server or forwarder response invalid\r\n"
1383 "Proxy-Agent: Privoxy " VERSION "\r\n"
1384 "Content-Type: text/plain\r\n"
1385 "Connection: close\r\n\r\n"
1386 "Bad response. The server or forwarder response doesn't look like HTTP.\r\n";
1389 /* XXX: should be a template */
1390 static const char NULL_BYTE_RESPONSE[] =
1391 "HTTP/1.0 400 Bad request received from client\r\n"
1392 "Proxy-Agent: Privoxy " VERSION "\r\n"
1393 "Content-Type: text/plain\r\n"
1394 "Connection: close\r\n\r\n"
1395 "Bad request. Null byte(s) before end of request.\r\n";
1398 /* XXX: should be a template */
1399 static const char MESSED_UP_REQUEST_RESPONSE[] =
1400 "HTTP/1.0 400 Malformed request after rewriting\r\n"
1401 "Proxy-Agent: Privoxy " VERSION "\r\n"
1402 "Content-Type: text/plain\r\n"
1403 "Connection: close\r\n\r\n"
1404 "Bad request. Messed up with header filters.\r\n";
1406 /* XXX: should be a template */
1407 static const char CONNECTION_TIMEOUT_RESPONSE[] =
1408 "HTTP/1.0 502 Connection timeout\r\n"
1409 "Proxy-Agent: Privoxy " VERSION "\r\n"
1410 "Content-Type: text/plain\r\n"
1411 "Connection: close\r\n\r\n"
1412 "The connection timed out.\r\n";
1414 /* A function to crunch a response */
1415 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
1417 /* Crunch function flags */
1418 #define CF_NO_FLAGS 0
1419 /* Cruncher applies to forced requests as well */
1420 #define CF_IGNORE_FORCE 1
1421 /* Crunched requests are counted for the block statistics */
1422 #define CF_COUNT_AS_REJECT 2
1424 /* A crunch function and its flags */
1427 const crunch_func_ptr cruncher;
1431 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
1433 /* Complete list of cruncher functions */
1434 static const struct cruncher crunchers_all[] = {
1435 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
1436 { block_url, CF_COUNT_AS_REJECT },
1437 #ifdef FEATURE_TRUST
1438 { trust_url, CF_COUNT_AS_REJECT },
1439 #endif /* def FEATURE_TRUST */
1440 { redirect_url, CF_NO_FLAGS },
1441 { dispatch_cgi, CF_IGNORE_FORCE},
1445 /* Light version, used after tags are applied */
1446 static const struct cruncher crunchers_light[] = {
1447 { block_url, CF_COUNT_AS_REJECT },
1448 { redirect_url, CF_NO_FLAGS },
1454 * XXX: Don't we really mean
1460 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1461 /*********************************************************************
1463 * Function : sig_handler
1465 * Description : Signal handler for different signals.
1466 * Exit gracefully on TERM and INT
1467 * or set a flag that will cause the errlog
1468 * to be reopened by the main thread on HUP.
1471 * 1 : the_signal = the signal cause this function to call
1475 *********************************************************************/
1476 static void sig_handler(int the_signal)
1482 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1494 received_hup_signal = 1;
1500 * We shouldn't be here, unless we catch signals
1501 * in main() that we can't handle here!
1503 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1511 /*********************************************************************
1513 * Function : client_protocol_is_unsupported
1515 * Description : Checks if the client used a known unsupported
1516 * protocol and deals with it by sending an error
1520 * 1 : csp = Current client state (buffers, headers, etc...)
1521 * 2 : req = the first request line send by the client
1523 * Returns : TRUE if an error response has been generated, or
1524 * FALSE if the request doesn't look invalid.
1526 *********************************************************************/
1527 static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1530 * If it's a FTP or gopher request, we don't support it.
1532 * These checks are better than nothing, but they might
1533 * not work in all configurations and some clients might
1534 * have problems digesting the answer.
1536 * They should, however, never cause more problems than
1537 * Privoxy's old behaviour (returning the misleading HTML
1540 * "Could not resolve http://(ftp|gopher)://example.org").
1542 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1544 const char *response = NULL;
1545 const char *protocol = NULL;
1547 if (!strncmpic(req, "GET ftp://", 10))
1549 response = FTP_RESPONSE;
1554 response = GOPHER_RESPONSE;
1555 protocol = "GOPHER";
1557 log_error(LOG_LEVEL_ERROR,
1558 "%s tried to use Privoxy as %s proxy: %s",
1559 csp->ip_addr_str, protocol, req);
1560 log_error(LOG_LEVEL_CLF,
1561 "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1563 write_socket(csp->cfd, response, strlen(response));
1572 /*********************************************************************
1574 * Function : get_request_destination_elsewhere
1576 * Description : If the client's request was redirected into
1577 * Privoxy without the client's knowledge,
1578 * the request line lacks the destination host.
1580 * This function tries to get it elsewhere,
1581 * provided accept-intercepted-requests is enabled.
1583 * "Elsewhere" currently only means "Host: header",
1584 * but in the future we may ask the redirecting
1585 * packet filter to look the destination up.
1587 * If the destination stays unknown, an error
1588 * response is send to the client and headers
1589 * are freed so that chat() can return directly.
1592 * 1 : csp = Current client state (buffers, headers, etc...)
1593 * 2 : headers = a header list
1595 * Returns : JB_ERR_OK if the destination is now known, or
1596 * JB_ERR_PARSE if it isn't.
1598 *********************************************************************/
1599 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1603 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1605 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1606 " Privoxy isn't configured to accept intercepted requests.",
1607 csp->ip_addr_str, csp->http->cmd);
1608 /* XXX: Use correct size */
1609 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1610 csp->ip_addr_str, csp->http->cmd);
1612 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1613 destroy_list(headers);
1615 return JB_ERR_PARSE;
1617 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1619 /* Split the domain we just got for pattern matching */
1620 init_domain_components(csp->http);
1626 /* We can't work without destination. Go spread the news.*/
1628 req = list_to_text(headers);
1630 /* XXX: Use correct size */
1631 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1632 csp->ip_addr_str, csp->http->cmd);
1633 log_error(LOG_LEVEL_ERROR,
1634 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1635 csp->ip_addr_str, csp->http->cmd, req);
1638 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
1639 destroy_list(headers);
1641 return JB_ERR_PARSE;
1644 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1645 * to get the destination IP address, use it as host directly
1646 * or do a reverse DNS lookup first.
1651 /*********************************************************************
1653 * Function : get_server_headers
1655 * Description : Parses server headers in iob and fills them
1656 * into csp->headers so that they can later be
1660 * 1 : csp = Current client state (buffers, headers, etc...)
1662 * Returns : JB_ERR_OK if everything went fine, or
1663 * JB_ERR_PARSE if the headers were incomplete.
1665 *********************************************************************/
1666 static jb_err get_server_headers(struct client_state *csp)
1668 int continue_hack_in_da_house = 0;
1671 while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
1676 * continue hack in da house. Ignore the ending of
1677 * this head and continue enlisting header lines.
1678 * The reason is described below.
1680 enlist(csp->headers, "");
1681 continue_hack_in_da_house = 0;
1684 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1687 * It's a bodyless continue response, don't
1688 * stop header parsing after reaching its end.
1690 * As a result Privoxy will concatenate the
1691 * next response's head and parse and deliver
1692 * the headers as if they belonged to one request.
1694 * The client will separate them because of the
1695 * empty line between them.
1697 * XXX: What we're doing here is clearly against
1698 * the intended purpose of the continue header,
1699 * and under some conditions (HTTP/1.0 client request)
1700 * it's a standard violation.
1702 * Anyway, "sort of against the spec" is preferable
1703 * to "always getting confused by Continue responses"
1704 * (Privoxy's behaviour before this hack was added)
1706 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1707 continue_hack_in_da_house = 1;
1709 else if (*header == '\0')
1712 * If the header is empty, but the Continue hack
1713 * isn't active, we can assume that we reached the
1714 * end of the buffer before we hit the end of the
1717 * Inform the caller an let it decide how to handle it.
1719 return JB_ERR_PARSE;
1722 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1725 * XXX: Should we quit the request and return a
1726 * out of memory error page instead?
1728 log_error(LOG_LEVEL_ERROR,
1729 "Out of memory while enlisting server headers. %s lost.",
1739 /*********************************************************************
1741 * Function : crunch_reason
1743 * Description : Translates the crunch reason code into a string.
1746 * 1 : rsp = a http_response
1748 * Returns : A string with the crunch reason or an error description.
1750 *********************************************************************/
1751 static const char *crunch_reason(const struct http_response *rsp)
1753 char * reason = NULL;
1755 assert(rsp != NULL);
1758 return "Internal error while searching for crunch reason";
1761 switch (rsp->reason)
1763 case RSP_REASON_UNSUPPORTED:
1764 reason = "Unsupported HTTP feature";
1766 case RSP_REASON_BLOCKED:
1769 case RSP_REASON_UNTRUSTED:
1770 reason = "Untrusted";
1772 case RSP_REASON_REDIRECTED:
1773 reason = "Redirected";
1775 case RSP_REASON_CGI_CALL:
1776 reason = "CGI Call";
1778 case RSP_REASON_NO_SUCH_DOMAIN:
1779 reason = "DNS failure";
1781 case RSP_REASON_FORWARDING_FAILED:
1782 reason = "Forwarding failed";
1784 case RSP_REASON_CONNECT_FAILED:
1785 reason = "Connection failure";
1787 case RSP_REASON_OUT_OF_MEMORY:
1788 reason = "Out of memory (may mask other reasons)";
1791 reason = "No reason recorded";
1799 /*********************************************************************
1801 * Function : send_crunch_response
1803 * Description : Delivers already prepared response for
1804 * intercepted requests, logs the interception
1805 * and frees the response.
1808 * 1 : csp = Current client state (buffers, headers, etc...)
1809 * 1 : rsp = Fully prepared response. Will be freed on exit.
1811 * Returns : Nothing.
1813 *********************************************************************/
1814 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp)
1816 const struct http_request *http = csp->http;
1817 char status_code[4];
1819 assert(rsp != NULL);
1820 assert(rsp->head != NULL);
1825 * Not supposed to happen. If it does
1826 * anyway, treat it as an unknown error.
1828 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1829 /* return code doesn't matter */
1834 /* If rsp is still NULL, we have serious internal problems. */
1835 log_error(LOG_LEVEL_FATAL,
1836 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1840 * Extract the status code from the actual head
1841 * that was send to the client. It is the only
1842 * way to get it right for all requests, including
1843 * the fixed ones for out-of-memory problems.
1845 * A head starts like this: 'HTTP/1.1 200...'
1849 status_code[0] = rsp->head[9];
1850 status_code[1] = rsp->head[10];
1851 status_code[2] = rsp->head[11];
1852 status_code[3] = '\0';
1854 /* Write the answer to the client */
1855 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1856 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1858 /* There is nothing we can do about it. */
1859 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1862 /* Log that the request was crunched and why. */
1863 log_error(LOG_LEVEL_CRUNCH, "%s: %s", crunch_reason(rsp), http->url);
1864 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %d",
1865 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1867 /* Clean up and return */
1868 if (cgi_error_memory() != rsp)
1870 free_http_response(rsp);
1877 /*********************************************************************
1879 * Function : request_contains_null_bytes
1881 * Description : Checks for NULL bytes in the request and sends
1882 * an error message to the client if any were found.
1884 * XXX: currently not used, see comment in chat().
1887 * 1 : csp = Current client state (buffers, headers, etc...)
1888 * 2 : buf = Data from the client's request to check.
1889 * 3 : len = The data length.
1891 * Returns : TRUE if the request contained one or more NULL bytes, or
1894 *********************************************************************/
1895 static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1897 size_t c_len; /* Request lenght when treated as C string */
1899 c_len = strlen(buf);
1904 * Null byte(s) found. Log the request,
1905 * return an error response and hang up.
1907 size_t tmp_len = c_len;
1912 * Replace NULL byte(s) with '°' characters
1913 * so the request can be logged as string.
1914 * XXX: Is there a better replacement character?
1917 tmp_len += strlen(buf+tmp_len);
1918 } while (tmp_len < len);
1920 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1921 "(length=%d, strlen=%d).", csp->ip_addr_str, len, c_len);
1922 log_error(LOG_LEVEL_HEADER,
1923 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1925 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
1927 /* XXX: Log correct size */
1928 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1938 /*********************************************************************
1940 * Function : crunch_response_triggered
1942 * Description : Checks if the request has to be crunched,
1943 * and delivers the crunch response if necessary.
1946 * 1 : csp = Current client state (buffers, headers, etc...)
1947 * 2 : crunchers = list of cruncher functions to run
1949 * Returns : TRUE if the request was answered with a crunch response
1952 *********************************************************************/
1953 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
1955 struct http_response *rsp = NULL;
1956 const struct cruncher *c;
1959 * If CGI request crunching is disabled,
1960 * check the CGI dispatcher out of order to
1961 * prevent unintentional blocks or redirects.
1963 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
1964 && (NULL != (rsp = dispatch_cgi(csp))))
1966 /* Deliver, log and free the interception response. */
1967 send_crunch_response(csp, rsp);
1971 for (c = crunchers; c->cruncher != NULL; c++)
1974 * Check the cruncher if either Privoxy is toggled
1975 * on and the request isn't forced, or if the cruncher
1976 * applies to forced requests as well.
1978 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
1979 !(csp->flags & CSP_FLAG_FORCED)) ||
1980 (c->flags & CF_IGNORE_FORCE))
1982 rsp = c->cruncher(csp);
1985 /* Deliver, log and free the interception response. */
1986 send_crunch_response(csp, rsp);
1987 #ifdef FEATURE_STATISTICS
1988 if (c->flags & CF_COUNT_AS_REJECT)
1990 csp->flags |= CSP_FLAG_REJECTED;
1992 #endif /* def FEATURE_STATISTICS */
2003 /*********************************************************************
2005 * Function : build_request_line
2007 * Description : Builds the HTTP request line.
2009 * If a HTTP forwarder is used it expects the whole URL,
2010 * web servers only get the path.
2013 * 1 : csp = Current client state (buffers, headers, etc...)
2014 * 2 : fwd = The forwarding spec used for the request
2015 * XXX: Should use http->fwd instead.
2016 * 3 : request_line = The old request line which will be replaced.
2018 * Returns : Nothing. Terminates in case of memory problems.
2020 *********************************************************************/
2021 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
2023 struct http_request *http = csp->http;
2025 assert(http->ssl == 0);
2028 * Downgrade http version from 1.1 to 1.0
2029 * if +downgrade action applies.
2031 if ( (csp->action->flags & ACTION_DOWNGRADE)
2032 && (!strcmpic(http->ver, "HTTP/1.1")))
2035 http->ver = strdup("HTTP/1.0");
2037 if (http->ver == NULL)
2039 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
2044 * Rebuild the request line.
2046 freez(*request_line);
2047 *request_line = strdup(http->gpc);
2048 string_append(request_line, " ");
2050 if (fwd->forward_host)
2052 string_append(request_line, http->url);
2056 string_append(request_line, http->path);
2058 string_append(request_line, " ");
2059 string_append(request_line, http->ver);
2061 if (*request_line == NULL)
2063 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
2065 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
2069 /*********************************************************************
2071 * Function : change_request_destination
2073 * Description : Parse a (rewritten) request line and regenerate
2074 * the http request data.
2077 * 1 : csp = Current client state (buffers, headers, etc...)
2079 * Returns : Forwards the parse_http_request() return code.
2080 * Terminates in case of memory problems.
2082 *********************************************************************/
2083 static jb_err change_request_destination(struct client_state *csp)
2085 struct http_request *http = csp->http;
2088 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
2089 free_http_request(http);
2090 err = parse_http_request(csp->headers->first->str, http, csp);
2091 if (JB_ERR_OK != err)
2093 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
2094 jb_err_to_string(err));
2098 /* XXX: ocmd is a misleading name */
2099 http->ocmd = strdup(http->cmd);
2100 if (http->ocmd == NULL)
2102 log_error(LOG_LEVEL_FATAL,
2103 "Out of memory copying rewritten HTTP request line");
2111 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2112 /*********************************************************************
2114 * Function : server_response_is_complete
2116 * Description : Determines whether we should stop reading
2117 * from the server socket.
2120 * 1 : csp = Current client state (buffers, headers, etc...)
2121 * 2 : content_length = Length of content received so far.
2123 * Returns : TRUE if the response is complete,
2126 *********************************************************************/
2127 static int server_response_is_complete(struct client_state *csp, size_t content_length)
2129 int content_length_known = (csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
2131 if (!strcmpic(csp->http->gpc, "HEAD"))
2134 * "HEAD" implies no body, we are thus expecting
2135 * no content. XXX: incomplete "list" of methods?
2137 csp->expected_content_length = 0;
2138 content_length_known = TRUE;
2141 if (csp->http->status == 304)
2144 * Expect no body. XXX: incomplete "list" of status codes?
2146 csp->expected_content_length = 0;
2147 content_length_known = TRUE;
2150 return (content_length_known && ((0 == csp->expected_content_length)
2151 || (csp->expected_content_length <= content_length)));
2153 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2155 /*********************************************************************
2157 * Function : mark_server_socket_tainted
2159 * Description : Makes sure we don't reuse a server socket
2160 * (if we didn't read everything the server sent
2161 * us reusing the socket would lead to garbage).
2164 * 1 : csp = Current client state (buffers, headers, etc...)
2168 *********************************************************************/
2169 static void mark_server_socket_tainted(struct client_state *csp)
2171 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
2173 log_error(LOG_LEVEL_CONNECT, "Unsetting keep-alive flag.");
2174 csp->flags &= ~CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE;
2178 /*********************************************************************
2180 * Function : get_request_line
2182 * Description : Read the client request line.
2185 * 1 : csp = Current client state (buffers, headers, etc...)
2187 * Returns : Pointer to request line or NULL in case of errors.
2189 *********************************************************************/
2190 static char *get_request_line(struct client_state *csp)
2192 char buf[BUFFER_SIZE];
2193 char *request_line = NULL;
2196 memset(buf, 0, sizeof(buf));
2200 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
2202 log_error(LOG_LEVEL_ERROR,
2203 "Stopped waiting for the request line.");
2204 write_socket(csp->cfd, CONNECTION_TIMEOUT_RESPONSE,
2205 strlen(CONNECTION_TIMEOUT_RESPONSE));
2209 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2211 if (len <= 0) return NULL;
2214 * If there is no memory left for buffering the
2215 * request, there is nothing we can do but hang up
2217 if (add_to_iob(csp, buf, len))
2222 request_line = get_header(csp->iob);
2224 } while ((NULL != request_line) && ('\0' == *request_line));
2226 return request_line;
2231 /*********************************************************************
2233 * Function : receive_client_request
2235 * Description : Read the client's request (more precisely the
2236 * client headers) and answer it if necessary.
2238 * Note that since we're not using select() we could get
2239 * blocked here if a client connected, then didn't say
2243 * 1 : csp = Current client state (buffers, headers, etc...)
2245 * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
2247 *********************************************************************/
2248 static jb_err receive_client_request(struct client_state *csp)
2250 char buf[BUFFER_SIZE];
2253 struct http_request *http;
2257 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
2258 struct list header_list;
2259 struct list *headers = &header_list;
2263 memset(buf, 0, sizeof(buf));
2265 req = get_request_line(csp);
2268 return JB_ERR_PARSE;
2270 assert(*req != '\0');
2272 if (client_protocol_is_unsupported(csp, req))
2274 return JB_ERR_PARSE;
2277 #ifdef FEATURE_FORCE_LOAD
2279 * If this request contains the FORCE_PREFIX and blocks
2280 * aren't enforced, get rid of it and set the force flag.
2282 if (strstr(req, FORCE_PREFIX))
2284 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
2286 log_error(LOG_LEVEL_FORCE,
2287 "Ignored force prefix in request: \"%s\".", req);
2291 strclean(req, FORCE_PREFIX);
2292 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
2293 csp->flags |= CSP_FLAG_FORCED;
2296 #endif /* def FEATURE_FORCE_LOAD */
2298 err = parse_http_request(req, http, csp);
2300 if (JB_ERR_OK != err)
2302 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
2303 /* XXX: Use correct size */
2304 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2305 log_error(LOG_LEVEL_ERROR,
2306 "Couldn't parse request line received from %s: %s",
2307 csp->ip_addr_str, jb_err_to_string(err));
2309 free_http_request(http);
2310 return JB_ERR_PARSE;
2313 /* grab the rest of the client's headers */
2317 p = get_header(csp->iob);
2321 /* There are no additional headers to read. */
2328 * We didn't receive a complete header
2329 * line yet, get the rest of it.
2331 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
2333 log_error(LOG_LEVEL_ERROR,
2334 "Stopped grabbing the client headers.");
2335 return JB_ERR_PARSE;
2338 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2341 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
2342 destroy_list(headers);
2343 return JB_ERR_PARSE;
2346 if (add_to_iob(csp, buf, len))
2349 * If there is no memory left for buffering the
2350 * request, there is nothing we can do but hang up
2352 destroy_list(headers);
2353 return JB_ERR_MEMORY;
2359 * We were able to read a complete
2360 * header and can finaly enlist it.
2367 if (http->host == NULL)
2370 * If we still don't know the request destination,
2371 * the request is invalid or the client uses
2372 * Privoxy without its knowledge.
2374 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
2377 * Our attempts to get the request destination
2378 * elsewhere failed or Privoxy is configured
2379 * to only accept proxy requests.
2381 * An error response has already been send
2382 * and we're done here.
2384 return JB_ERR_PARSE;
2389 * Determine the actions for this URL
2391 #ifdef FEATURE_TOGGLE
2392 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
2394 /* Most compatible set of actions (i.e. none) */
2395 init_current_action(csp->action);
2398 #endif /* ndef FEATURE_TOGGLE */
2400 get_url_actions(csp, http);
2404 * Save a copy of the original request for logging
2406 http->ocmd = strdup(http->cmd);
2407 if (http->ocmd == NULL)
2409 log_error(LOG_LEVEL_FATAL,
2410 "Out of memory copying HTTP request line");
2412 enlist(csp->headers, http->cmd);
2414 /* Append the previously read headers */
2415 list_append_list_unique(csp->headers, headers);
2416 destroy_list(headers);
2423 /*********************************************************************
2425 * Function : parse_client_request
2427 * Description : Parses the client's request and decides what to do
2430 * Note that since we're not using select() we could get
2431 * blocked here if a client connected, then didn't say
2435 * 1 : csp = Current client state (buffers, headers, etc...)
2437 * Returns : JB_ERR_OK or JB_ERR_PARSE
2439 *********************************************************************/
2440 static jb_err parse_client_request(struct client_state *csp)
2442 struct http_request *http = csp->http;
2445 err = sed(csp, FILTER_CLIENT_HEADERS);
2446 if (JB_ERR_OK != err)
2448 /* XXX: Should be handled in sed(). */
2449 assert(err == JB_ERR_PARSE);
2450 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers.");
2452 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2454 /* Check request line for rewrites. */
2455 if ((NULL == csp->headers->first->str)
2456 || (strcmp(http->cmd, csp->headers->first->str) &&
2457 (JB_ERR_OK != change_request_destination(csp))))
2460 * A header filter broke the request line - bail out.
2462 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
2463 /* XXX: Use correct size */
2464 log_error(LOG_LEVEL_CLF,
2465 "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
2466 log_error(LOG_LEVEL_ERROR,
2467 "Invalid request line after applying header filters.");
2468 free_http_request(http);
2470 return JB_ERR_PARSE;
2478 /*********************************************************************
2482 * Description : Once a connection to the client has been accepted,
2483 * this function is called (via serve()) to handle the
2484 * main business of the communication. When this
2485 * function returns, the caller must close the client
2488 * FIXME: chat is nearly thousand lines long.
2492 * 1 : csp = Current client state (buffers, headers, etc...)
2494 * Returns : Nothing.
2496 *********************************************************************/
2497 static void chat(struct client_state *csp)
2499 char buf[BUFFER_SIZE];
2506 int ms_iis5_hack = 0;
2507 size_t byte_count = 0;
2508 int forwarded_connect_retries = 0;
2509 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
2510 const struct forward_spec *fwd;
2511 struct http_request *http;
2512 int len = 0; /* for buffer sizes (and negative error codes) */
2514 /* Function that does the content filtering for the current request */
2515 filter_function_ptr content_filter = NULL;
2517 /* Skeleton for HTTP response, if we should intercept the request */
2518 struct http_response *rsp;
2519 struct timeval timeout;
2521 memset(buf, 0, sizeof(buf));
2522 memset(&timeout, 0, sizeof(timeout));
2523 timeout.tv_sec = csp->config->socket_timeout;
2527 if (receive_client_request(csp) != JB_ERR_OK)
2531 if (parse_client_request(csp) != JB_ERR_OK)
2536 /* decide how to route the HTTP request */
2537 fwd = forward_url(csp, http);
2540 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
2541 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2545 * build the http request to send to the server
2546 * we have to do one of the following:
2548 * create = use the original HTTP request to create a new
2549 * HTTP request that has either the path component
2550 * without the http://domainspec (w/path) or the
2551 * full orininal URL (w/url)
2552 * Note that the path and/or the HTTP version may
2553 * have been altered by now.
2555 * connect = Open a socket to the host:port of the server
2556 * and short-circuit server and client socket.
2558 * pass = Pass the request unchanged if forwarding a CONNECT
2559 * request to a parent proxy. Note that we'll be sending
2560 * the CFAIL message ourselves if connecting to the parent
2561 * fails, but we won't send a CSUCCEED message if it works,
2562 * since that would result in a double message (ours and the
2563 * parent's). After sending the request to the parent, we simply
2566 * here's the matrix:
2569 * +--------+--------+
2571 * 0 | create | connect|
2573 * Forwarding +--------+--------+
2575 * 1 | create | pass |
2577 * +--------+--------+
2581 if (http->ssl && connect_port_is_forbidden(csp))
2583 const char *acceptable_connect_ports =
2584 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
2585 assert(NULL != acceptable_connect_ports);
2586 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
2587 "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
2588 csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
2589 csp->action->flags |= ACTION_BLOCK;
2595 freez(csp->headers->first->str);
2596 build_request_line(csp, fwd, &csp->headers->first->str);
2600 * We have a request. Check if one of the crunchers wants it.
2602 if (crunch_response_triggered(csp, crunchers_all))
2605 * Yes. The client got the crunch response
2606 * and we are done here after cleaning up.
2608 /* XXX: why list_remove_all()? */
2609 list_remove_all(csp->headers);
2614 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2616 if (fwd->forward_host)
2618 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2619 fwd->forward_host, fwd->forward_port, http->hostport);
2623 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2626 /* here we connect to the server, gateway, or the forwarder */
2628 while ((csp->sfd = forwarded_connect(fwd, http, csp))
2629 && (errno == EINVAL)
2630 && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2632 log_error(LOG_LEVEL_ERROR,
2633 "failed request #%u to connect to %s. Trying again.",
2634 forwarded_connect_retries, http->hostport);
2637 if (csp->sfd == JB_INVALID_SOCKET)
2639 if (fwd->type != SOCKS_NONE)
2642 rsp = error_response(csp, "forwarding-failed", errno);
2644 else if (errno == EINVAL)
2646 rsp = error_response(csp, "no-such-domain", errno);
2650 rsp = error_response(csp, "connect-failed", errno);
2651 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2655 /* Write the answer to the client */
2658 send_crunch_response(csp, rsp);
2664 hdr = list_to_text(csp->headers);
2667 /* FIXME Should handle error properly */
2668 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2670 list_remove_all(csp->headers);
2672 if (fwd->forward_host || (http->ssl == 0))
2675 * Write the client's (modified) header to the server
2676 * (along with anything else that may be in the buffer)
2678 if (write_socket(csp->sfd, hdr, strlen(hdr))
2679 || (flush_socket(csp->sfd, csp->iob) < 0))
2681 log_error(LOG_LEVEL_CONNECT,
2682 "write header to: %s failed: %E", http->hostport);
2684 rsp = error_response(csp, "connect-failed", errno);
2687 send_crunch_response(csp, rsp);
2697 * We're running an SSL tunnel and we're not forwarding,
2698 * so just send the "connect succeeded" message to the
2699 * client, flush the rest, and get out of the way.
2701 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
2709 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2711 /* we're finished with the client's header */
2714 maxfd = (csp->cfd > csp->sfd) ? csp->cfd : csp->sfd;
2716 /* pass data between the client and server
2717 * until one or the other shuts down the connection.
2726 * FD_ZERO here seems to point to an errant macro which crashes.
2727 * So do this by hand for now...
2729 memset(&rfds,0x00,sizeof(fd_set));
2733 FD_SET(csp->cfd, &rfds);
2734 FD_SET(csp->sfd, &rfds);
2736 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2737 if ((csp->flags & CSP_FLAG_CHUNKED)
2738 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
2739 && ((csp->iob->eod - csp->iob->cur) >= 5)
2740 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
2742 log_error(LOG_LEVEL_CONNECT,
2743 "Looks like we read the last chunk together with "
2744 "the server headers. We better stop reading.");
2745 byte_count = (size_t)(csp->iob->eod - csp->iob->cur);
2746 csp->expected_content_length = byte_count;
2747 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2749 if (server_body && server_response_is_complete(csp, byte_count))
2751 log_error(LOG_LEVEL_CONNECT,
2752 "Done reading from server. Expected content length: %d. "
2753 "Actual content length: %d. Most recently received: %d.",
2754 csp->expected_content_length, byte_count, len);
2757 * XXX: should not jump around,
2758 * chat() is complicated enough already.
2762 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2764 n = select((int)maxfd+1, &rfds, NULL, NULL, &timeout);
2768 log_error(LOG_LEVEL_ERROR, "Didn't receive data in time.");
2769 if ((byte_count == 0) && (http->ssl == 0))
2771 write_socket(csp->cfd, CONNECTION_TIMEOUT_RESPONSE,
2772 strlen(CONNECTION_TIMEOUT_RESPONSE));
2774 mark_server_socket_tainted(csp);
2779 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2780 mark_server_socket_tainted(csp);
2785 * This is the body of the browser's request,
2786 * just read and write it.
2788 if (FD_ISSET(csp->cfd, &rfds))
2790 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2794 /* XXX: not sure if this is necessary. */
2795 mark_server_socket_tainted(csp);
2796 break; /* "game over, man" */
2799 if (write_socket(csp->sfd, buf, (size_t)len))
2801 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2802 mark_server_socket_tainted(csp);
2809 * The server wants to talk. It could be the header or the body.
2810 * If `hdr' is null, then it's the header otherwise it's the body.
2811 * FIXME: Does `hdr' really mean `host'? No.
2813 if (FD_ISSET(csp->sfd, &rfds))
2816 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2820 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2822 if (http->ssl && (fwd->forward_host == NULL))
2825 * Just hang up. We already confirmed the client's CONNECT
2826 * request with status code 200 and unencrypted content is
2827 * no longer welcome.
2829 log_error(LOG_LEVEL_ERROR,
2830 "CONNECT already confirmed. Unable to tell the client about the problem.");
2833 else if (byte_count)
2836 * Just hang up. We already transmitted the original headers
2837 * and parts of the original content and therefore missed the
2838 * chance to send an error message (without risking data corruption).
2840 * XXX: we could retry with a fancy range request here.
2842 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2843 "Unable to tell the client about the problem.");
2844 mark_server_socket_tainted(csp);
2848 rsp = error_response(csp, "connect-failed", errno);
2851 send_crunch_response(csp, rsp);
2857 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2858 if (csp->flags & CSP_FLAG_CHUNKED)
2860 if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2862 /* XXX: this is a temporary hack */
2863 log_error(LOG_LEVEL_CONNECT,
2864 "Looks like we reached the end of the last chunk. "
2865 "We better stop reading.");
2866 csp->expected_content_length = byte_count + (size_t)len;
2867 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2871 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2874 * Add a trailing zero to let be able to use string operations.
2875 * XXX: do we still need this with filter_popups gone?
2880 * Normally, this would indicate that we've read
2881 * as much as the server has sent us and we can
2882 * close the client connection. However, Microsoft
2883 * in its wisdom has released IIS/5 with a bug that
2884 * prevents it from sending the trailing \r\n in
2885 * a 302 redirect header (and possibly other headers).
2886 * To work around this if we've haven't parsed
2887 * a full header we'll append a trailing \r\n
2888 * and see if this now generates a valid one.
2890 * This hack shouldn't have any impacts. If we've
2891 * already transmitted the header or if this is a
2892 * SSL connection, then we won't bother with this
2893 * hack. So we only work on partially received
2894 * headers. If we append a \r\n and this still
2895 * doesn't generate a valid header, then we won't
2896 * transmit anything to the client.
2901 if (server_body || http->ssl)
2904 * If we have been buffering up the document,
2905 * now is the time to apply content modification
2906 * and send the result to the client.
2910 p = execute_content_filter(csp, content_filter);
2912 * If the content filter fails, use the original
2913 * buffer and length.
2914 * (see p != NULL ? p : csp->iob->cur below)
2918 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2921 if (JB_ERR_OK != update_server_headers(csp))
2923 log_error(LOG_LEVEL_FATAL,
2924 "Failed to update server headers. after filtering.");
2927 hdr = list_to_text(csp->headers);
2930 /* FIXME Should handle error properly */
2931 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2934 if (write_socket(csp->cfd, hdr, strlen(hdr))
2935 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
2937 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2940 mark_server_socket_tainted(csp);
2948 break; /* "game over, man" */
2952 * This is NOT the body, so
2953 * Let's pretend the server just sent us a blank line.
2955 snprintf(buf, sizeof(buf), "\r\n");
2956 len = (int)strlen(buf);
2959 * Now, let the normal header parsing algorithm below do its
2960 * job. If it fails, we'll exit instead of continuing.
2967 * If this is an SSL connection or we're in the body
2968 * of the server document, just write it to the client,
2969 * unless we need to buffer the body for later content-filtering
2971 if (server_body || http->ssl)
2976 * If there is no memory left for buffering the content, or the buffer limit
2977 * has been reached, switch to non-filtering mode, i.e. make & write the
2978 * header, flush the iob and buf, and get out of the way.
2980 if (add_to_iob(csp, buf, len))
2985 log_error(LOG_LEVEL_INFO,
2986 "Flushing header and buffers. Stepping back from filtering.");
2988 hdr = list_to_text(csp->headers);
2992 * Memory is too tight to even generate the header.
2993 * Send our static "Out-of-memory" page.
2995 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2996 rsp = cgi_error_memory();
2997 send_crunch_response(csp, rsp);
2998 mark_server_socket_tainted(csp);
3001 hdrlen = strlen(hdr);
3003 if (write_socket(csp->cfd, hdr, hdrlen)
3004 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
3005 || (write_socket(csp->cfd, buf, (size_t)len)))
3007 log_error(LOG_LEVEL_CONNECT,
3008 "Flush header and buffers to client failed: %E");
3010 mark_server_socket_tainted(csp);
3015 * Reset the byte_count to the amount of bytes
3016 * we just flushed. len will be added a few lines below,
3017 * hdrlen doesn't matter for LOG_LEVEL_CLF.
3019 byte_count = (size_t)flushed;
3021 content_filter = NULL;
3027 if (write_socket(csp->cfd, buf, (size_t)len))
3029 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
3030 mark_server_socket_tainted(csp);
3034 byte_count += (size_t)len;
3039 const char *header_start;
3041 * We're still looking for the end of the server's header.
3042 * Buffer up the data we just read. If that fails, there's
3043 * little we can do but send our static out-of-memory page.
3045 if (add_to_iob(csp, buf, len))
3047 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
3048 rsp = cgi_error_memory();
3049 send_crunch_response(csp, rsp);
3050 mark_server_socket_tainted(csp);
3054 header_start = csp->iob->cur;
3056 /* Convert iob into something sed() can digest */
3057 if (JB_ERR_PARSE == get_server_headers(csp))
3062 * Well, we tried our MS IIS/5 hack and it didn't work.
3063 * The header is incomplete and there isn't anything
3064 * we can do about it.
3066 log_error(LOG_LEVEL_INFO,
3067 "MS IIS5 hack didn't produce valid headers.");
3073 * Since we have to wait for more from the server before
3074 * we can parse the headers we just continue here.
3076 int header_offset = csp->iob->cur - header_start;
3077 assert(csp->iob->cur >= header_start);
3078 byte_count += (size_t)(len - header_offset);
3079 log_error(LOG_LEVEL_CONNECT, "Continuing buffering headers. "
3080 "byte_count: %d. header_offset: %d. len: %d.",
3081 byte_count, header_offset, len);
3086 /* Did we actually get anything? */
3087 if (NULL == csp->headers->first)
3089 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
3090 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3091 write_socket(csp->cfd, NO_SERVER_DATA_RESPONSE, strlen(NO_SERVER_DATA_RESPONSE));
3092 free_http_request(http);
3093 mark_server_socket_tainted(csp);
3097 assert(csp->headers->first->str);
3099 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
3100 strncmpic(csp->headers->first->str, "ICY", 3))
3103 * It doesn't look like a HTTP (or Shoutcast) response:
3104 * tell the client and log the problem.
3106 if (strlen(csp->headers->first->str) > 30)
3108 csp->headers->first->str[30] = '\0';
3110 log_error(LOG_LEVEL_ERROR,
3111 "Invalid server or forwarder response. Starts with: %s",
3112 csp->headers->first->str);
3113 log_error(LOG_LEVEL_CLF,
3114 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3115 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
3116 strlen(INVALID_SERVER_HEADERS_RESPONSE));
3117 free_http_request(http);
3118 mark_server_socket_tainted(csp);
3123 * We have now received the entire server header,
3124 * filter it and send the result to the client
3126 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
3128 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
3130 hdr = list_to_text(csp->headers);
3133 /* FIXME Should handle error properly */
3134 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3137 if (crunch_response_triggered(csp, crunchers_light))
3140 * One of the tags created by a server-header
3141 * tagger triggered a crunch. We already
3142 * delivered the crunch response to the client
3143 * and are done here after cleaning up.
3146 mark_server_socket_tainted(csp);
3149 /* Buffer and pcrs filter this if appropriate. */
3151 if (!http->ssl) /* We talk plaintext */
3153 content_filter = get_filter_function(csp);
3156 * Only write if we're not buffering for content modification
3158 if (!content_filter)
3161 * Write the server's (modified) header to
3162 * the client (along with anything else that
3163 * may be in the buffer)
3166 if (write_socket(csp->cfd, hdr, strlen(hdr))
3167 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
3169 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
3172 * The write failed, so don't bother mentioning it
3173 * to the client... it probably can't hear us anyway.
3176 mark_server_socket_tainted(csp);
3180 byte_count += (size_t)len;
3185 * XXX: the header lenght should probably
3186 * be calculated by get_server_headers().
3188 int header_length = csp->iob->cur - header_start;
3189 assert(csp->iob->cur > header_start);
3190 byte_count += (size_t)(len - header_length);
3193 /* we're finished with the server's header */
3199 * If this was a MS IIS/5 hack then it means the server
3200 * has already closed the connection. Nothing more to read.
3205 log_error(LOG_LEVEL_INFO,
3206 "Closed server connection detected with MS IIS5 hack enabled.");
3212 mark_server_socket_tainted(csp);
3213 return; /* huh? we should never get here */
3216 if (csp->content_length == 0)
3219 * If Privoxy didn't recalculate the Content-Lenght,
3220 * byte_count is still correct.
3222 csp->content_length = byte_count;
3225 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3226 && (csp->expected_content_length != byte_count))
3228 log_error(LOG_LEVEL_CONNECT,
3229 "Received %d bytes while expecting %d.",
3230 byte_count, csp->expected_content_length);
3231 mark_server_socket_tainted(csp);
3234 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
3235 csp->ip_addr_str, http->ocmd, csp->content_length);
3239 /*********************************************************************
3241 * Function : wait_for_alive_connections
3243 * Description : Waits for alive connections to timeout.
3249 *********************************************************************/
3250 static void wait_for_alive_connections()
3252 int connections_alive = close_unusable_connections();
3254 while (0 < connections_alive)
3256 log_error(LOG_LEVEL_CONNECT,
3257 "Waiting for %d connections to timeout.",
3260 connections_alive = close_unusable_connections();
3263 log_error(LOG_LEVEL_CONNECT, "No connections to wait for left.");
3267 /*********************************************************************
3271 * Description : This is little more than chat. We only "serve" to
3272 * to close any socket that chat may have opened.
3275 * 1 : csp = Current client state (buffers, headers, etc...)
3279 *********************************************************************/
3281 void serve(struct client_state *csp)
3282 #else /* ifndef AMIGA */
3283 static void serve(struct client_state *csp)
3284 #endif /* def AMIGA */
3287 close_socket(csp->cfd);
3289 if (csp->sfd != JB_INVALID_SOCKET)
3291 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3292 static int monitor_thread_running = 0;
3294 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
3295 && (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
3297 remember_connection(csp->sfd, csp->http, forward_url(csp, csp->http));
3298 privoxy_mutex_lock(&connection_reuse_mutex);
3299 if (!monitor_thread_running)
3301 monitor_thread_running = 1;
3302 privoxy_mutex_unlock(&connection_reuse_mutex);
3303 wait_for_alive_connections();
3304 privoxy_mutex_lock(&connection_reuse_mutex);
3305 monitor_thread_running = 0;
3307 privoxy_mutex_unlock(&connection_reuse_mutex);
3311 forget_connection(csp->sfd);
3312 close_socket(csp->sfd);
3315 close_socket(csp->sfd);
3316 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3319 csp->flags &= ~CSP_FLAG_ACTIVE;
3325 /*********************************************************************
3327 * Function : server_thread
3329 * Description : We only exist to call `serve' in a threaded environment.
3332 * 1 : data = Current client state (buffers, headers, etc...)
3334 * Returns : Always 0.
3336 *********************************************************************/
3337 static int32 server_thread(void *data)
3339 serve((struct client_state *) data);
3346 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3347 /*********************************************************************
3351 * Description : Print usage info & exit.
3353 * Parameters : Pointer to argv[0] for identifying ourselves
3357 *********************************************************************/
3358 static void usage(const char *myname)
3360 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
3364 #endif /* defined(unix) */
3367 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
3368 #endif /* defined(unix) */
3369 "[--version] [configfile]\n"
3370 "Aborting\n", myname);
3375 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
3378 #ifdef MUTEX_LOCKS_AVAILABLE
3379 /*********************************************************************
3381 * Function : privoxy_mutex_lock
3383 * Description : Locks a mutex.
3386 * 1 : mutex = The mutex to lock.
3388 * Returns : Void. May exit in case of errors.
3390 *********************************************************************/
3391 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
3393 #ifdef FEATURE_PTHREAD
3394 int err = pthread_mutex_lock(mutex);
3397 if (mutex != &log_mutex)
3399 log_error(LOG_LEVEL_FATAL,
3400 "Mutex locking failed: %s.\n", strerror(err));
3405 EnterCriticalSection(mutex);
3406 #endif /* def FEATURE_PTHREAD */
3410 /*********************************************************************
3412 * Function : privoxy_mutex_unlock
3414 * Description : Unlocks a mutex.
3417 * 1 : mutex = The mutex to unlock.
3419 * Returns : Void. May exit in case of errors.
3421 *********************************************************************/
3422 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
3424 #ifdef FEATURE_PTHREAD
3425 int err = pthread_mutex_unlock(mutex);
3428 if (mutex != &log_mutex)
3430 log_error(LOG_LEVEL_FATAL,
3431 "Mutex unlocking failed: %s.\n", strerror(err));
3436 LeaveCriticalSection(mutex);
3437 #endif /* def FEATURE_PTHREAD */
3441 /*********************************************************************
3443 * Function : privoxy_mutex_init
3445 * Description : Prepares a mutex.
3448 * 1 : mutex = The mutex to initialize.
3450 * Returns : Void. May exit in case of errors.
3452 *********************************************************************/
3453 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
3455 #ifdef FEATURE_PTHREAD
3456 int err = pthread_mutex_init(mutex, 0);
3459 printf("Fatal error. Mutex initialization failed: %s.\n",
3464 InitializeCriticalSection(mutex);
3465 #endif /* def FEATURE_PTHREAD */
3467 #endif /* def MUTEX_LOCKS_AVAILABLE */
3469 /*********************************************************************
3471 * Function : initialize_mutexes
3473 * Description : Prepares mutexes if mutex support is available.
3477 * Returns : Void, exits in case of errors.
3479 *********************************************************************/
3480 static void initialize_mutexes(void)
3482 #ifdef MUTEX_LOCKS_AVAILABLE
3484 * Prepare global mutex semaphores
3486 privoxy_mutex_init(&log_mutex);
3487 privoxy_mutex_init(&log_init_mutex);
3488 privoxy_mutex_init(&connection_reuse_mutex);
3491 * XXX: The assumptions below are a bit naive
3492 * and can cause locks that aren't necessary.
3494 * For example older FreeBSD versions (< 6.x?)
3495 * have no gethostbyname_r, but gethostbyname is
3498 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
3499 privoxy_mutex_init(&resolver_mutex);
3500 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
3502 * XXX: should we use a single mutex for
3503 * localtime() and gmtime() as well?
3505 #ifndef HAVE_GMTIME_R
3506 privoxy_mutex_init(&gmtime_mutex);
3507 #endif /* ndef HAVE_GMTIME_R */
3509 #ifndef HAVE_LOCALTIME_R
3510 privoxy_mutex_init(&localtime_mutex);
3511 #endif /* ndef HAVE_GMTIME_R */
3514 privoxy_mutex_init(&rand_mutex);
3515 #endif /* ndef HAVE_RANDOM */
3516 #endif /* def MUTEX_LOCKS_AVAILABLE */
3520 /*********************************************************************
3524 * Description : Load the config file and start the listen loop.
3525 * This function is a lot more *sane* with the `load_config'
3526 * and `listen_loop' functions; although it stills does
3527 * a *little* too much for my taste.
3530 * 1 : argc = Number of parameters (including $0).
3531 * 2 : argv = Array of (char *)'s to the parameters.
3533 * Returns : 1 if : can't open config file, unrecognized directive,
3534 * stats requested in multi-thread mode, can't open the
3535 * log file, can't open the jar file, listen port is invalid,
3536 * any load fails, and can't bind port.
3538 * Else main never returns, the process must be signaled
3539 * to terminate execution. Or, on Windows, use the
3540 * "File", "Exit" menu option.
3542 *********************************************************************/
3544 int real_main(int argc, const char *argv[])
3546 int main(int argc, const char *argv[])
3550 unsigned int random_seed;
3552 struct passwd *pw = NULL;
3553 struct group *grp = NULL;
3556 char *pre_chroot_nslookup_to_load_resolver = NULL;
3563 #if !defined(_WIN32)
3570 /* Enable logging until further notice. */
3571 init_log_module(Argv[0]);
3574 * Parse the command line arguments
3576 * XXX: simply printing usage information in case of
3577 * invalid arguments isn't particularly user friendly.
3579 while (++argc_pos < argc)
3582 /* Check to see if the service must be installed or uninstalled */
3583 if (strncmp(argv[argc_pos], "--install", 9) == 0)
3585 const char *pName = argv[argc_pos] + 9;
3588 exit( (install_service(pName)) ? 0 : 1 );
3590 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
3592 const char *pName = argv[argc_pos] + 11;
3595 exit((uninstall_service(pName)) ? 0 : 1);
3597 else if (strcmp(argv[argc_pos], "--service" ) == 0)
3599 bRunAsService = TRUE;
3600 w32_set_service_cwd();
3601 atexit(w32_service_exit_notify);
3604 #endif /* defined(_WIN32) */
3607 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3609 if (strcmp(argv[argc_pos], "--help") == 0)
3614 else if(strcmp(argv[argc_pos], "--version") == 0)
3616 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
3622 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
3627 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
3629 if (++argc_pos == argc) usage(argv[0]);
3630 pidfile = strdup(argv[argc_pos]);
3633 else if (strcmp(argv[argc_pos], "--user" ) == 0)
3635 if (++argc_pos == argc) usage(argv[argc_pos]);
3637 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
3640 if (NULL == (grp = getgrnam(p)))
3642 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
3646 if (NULL == (pw = getpwnam(argv[argc_pos])))
3648 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
3651 if (p != NULL) *--p = '\0';
3654 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
3656 if (++argc_pos == argc) usage(argv[0]);
3657 pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
3660 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
3664 #endif /* defined(unix) */
3666 else if (argc_pos + 1 != argc)
3669 * This is neither the last command line
3670 * option, nor was it recognized before,
3671 * therefore it must be invalid.
3677 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3679 configfile = argv[argc_pos];
3682 } /* -END- while (more arguments) */
3685 if ( *configfile != '/' )
3687 char cwd[BUFFER_SIZE];
3689 size_t abs_file_size;
3691 /* make config-filename absolute here */
3692 if (NULL == getcwd(cwd, sizeof(cwd)))
3694 perror("failed to get current working directory");
3699 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3700 basedir = strdup(cwd);
3702 if (NULL == basedir ||
3703 NULL == (abs_file = malloc(abs_file_size)))
3705 perror("malloc failed");
3708 strlcpy(abs_file, basedir, abs_file_size);
3709 strlcat(abs_file, "/", abs_file_size );
3710 strlcat(abs_file, configfile, abs_file_size);
3711 configfile = abs_file;
3713 #endif /* defined unix */
3717 clients->next = NULL;
3719 /* XXX: factor out initialising after the next stable release. */
3722 #elif defined(_WIN32)
3726 /* Prepare mutexes if supported and necessary. */
3727 initialize_mutexes();
3729 random_seed = (unsigned int)time(NULL);
3731 srandom(random_seed);
3734 #endif /* ifdef HAVE_RANDOM */
3737 * Unix signal handling
3739 * Catch the abort, interrupt and terminate signals for a graceful exit
3740 * Catch the hangup signal so the errlog can be reopened.
3741 * Ignore the broken pipe signals (FIXME: Why?)
3743 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3746 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3747 const int ignored_signals[] = { SIGPIPE, 0 };
3749 for (idx = 0; catched_signals[idx] != 0; idx++)
3751 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3752 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3754 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3755 #endif /* ifdef sun */
3757 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3761 for (idx = 0; ignored_signals[idx] != 0; idx++)
3763 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3765 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3770 #else /* ifdef _WIN32 */
3771 # ifdef _WIN_CONSOLE
3773 * We *are* in a windows console app.
3774 * Print a verbose messages about FAQ's and such
3776 printf("%s", win32_blurb);
3777 # endif /* def _WIN_CONSOLE */
3778 #endif /* def _WIN32 */
3781 /* Initialize the CGI subsystem */
3782 cgi_init_error_messages();
3785 * If runnig on unix and without the --nodaemon
3786 * option, become a daemon. I.e. fork, detach
3787 * from tty and get process group leadership
3800 if ( pid < 0 ) /* error */
3805 else if ( pid != 0 ) /* parent */
3810 * must check for errors
3811 * child died due to missing files aso
3814 wpid = waitpid( pid, &status, WNOHANG );
3823 /* Should be more portable, but not as well tested */
3828 #else /* ndef __FreeBSD__ */
3830 #endif /* ndef __FreeBSD__ */
3831 fd = open("/dev/tty", O_RDONLY);
3834 /* no error check here */
3835 ioctl( fd, TIOCNOTTY,0 );
3840 * stderr (fd 2) will be closed later on, when the
3841 * log file has been parsed.
3848 } /* -END- if (!no_daemon) */
3851 * As soon as we have written the PID file, we can switch
3852 * to the user and group ID indicated by the --user option
3858 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3860 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3866 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3868 /* Read the time zone file from /etc before doing chroot. */
3870 if (NULL != pre_chroot_nslookup_to_load_resolver
3871 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3873 /* Initialize resolver library. */
3874 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3876 if (chroot(pw->pw_dir) < 0)
3878 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3882 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3885 if (setuid(pw->pw_uid))
3887 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3891 char putenv_dummy[64];
3893 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3894 if (putenv(putenv_dummy) != 0)
3896 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3899 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3900 if (putenv(putenv_dummy) != 0)
3902 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3908 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3911 #endif /* defined unix */
3914 /* This will be FALSE unless the command line specified --service
3918 /* Yup, so now we must attempt to establish a connection
3919 * with the service dispatcher. This will only work if this
3920 * process was launched by the service control manager to
3921 * actually run as a service. If this isn't the case, i've
3922 * known it take around 30 seconds or so for the call to return.
3925 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3926 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3928 /* Service has run, and at this point is now being stopped, so just return */
3933 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3935 /* An error occurred. Usually it's because --service was wrongly specified
3936 * and we were unable to connect to the Service Control Dispatcher because
3937 * it wasn't expecting us and is therefore not listening.
3939 * For now, just continue below to call the listen_loop function.
3942 #endif /* def _WIN32 */
3952 /*********************************************************************
3954 * Function : bind_port_helper
3956 * Description : Bind the listen port. Handles logging, and aborts
3960 * 1 : config = Privoxy configuration. Specifies port
3963 * Returns : Port that was opened.
3965 *********************************************************************/
3966 static jb_socket bind_port_helper(struct configuration_spec * config)
3971 if (config->haddr == NULL)
3973 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3978 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3979 config->hport, config->haddr);
3982 result = bind_port(config->haddr, config->hport, &bfd);
3989 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3990 "There may be another Privoxy or some other "
3991 "proxy running on port %d",
3992 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
3993 config->hport, config->hport);
3996 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3997 "The hostname is not resolvable",
3998 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
4001 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
4002 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
4005 /* shouldn't get here */
4006 return JB_INVALID_SOCKET;
4009 config->need_bind = 0;
4016 /* Without this simple workaround we get this compiler warning from _beginthread
4017 * warning C4028: formal parameter 1 different from declaration
4019 void w32_service_listen_loop(void *p)
4023 #endif /* def _WIN32 */
4026 /*********************************************************************
4028 * Function : listen_loop
4030 * Description : bind the listen port and enter a "FOREVER" listening loop.
4036 *********************************************************************/
4037 static void listen_loop(void)
4039 struct client_state *csp = NULL;
4041 struct configuration_spec * config;
4043 config = load_config();
4045 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4047 * XXX: Should be relocated once it no
4048 * longer needs to emit log messages.
4050 initialize_reusable_connections();
4051 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4053 bfd = bind_port_helper(config);
4055 #ifdef FEATURE_GRACEFUL_TERMINATION
4056 while (!g_terminate)
4061 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
4062 while (waitpid(-1, NULL, WNOHANG) > 0)
4064 /* zombie children */
4066 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
4069 * Free data that was used by died threads
4075 * Re-open the errlog after HUP signal
4077 if (received_hup_signal)
4079 if (NULL != config->logfile)
4081 init_error_log(Argv[0], config->logfile);
4083 received_hup_signal = 0;
4087 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
4089 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
4093 csp->flags |= CSP_FLAG_ACTIVE;
4094 csp->sfd = JB_INVALID_SOCKET;
4096 csp->config = config = load_config();
4098 if ( config->need_bind )
4101 * Since we were listening to the "old port", we will not see
4102 * a "listen" param change until the next IJB request. So, at
4103 * least 1 more request must be made for us to find the new
4104 * setting. I am simply closing the old socket and binding the
4107 * Which-ever is correct, we will serve 1 more page via the
4108 * old settings. This should probably be a "show-proxy-args"
4109 * request. This should not be a so common of an operation
4110 * that this will hurt people's feelings.
4115 bfd = bind_port_helper(config);
4118 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
4120 if (!accept_connection(csp, bfd))
4122 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
4135 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
4138 #ifdef FEATURE_TOGGLE
4139 if (global_toggle_state)
4140 #endif /* def FEATURE_TOGGLE */
4142 csp->flags |= CSP_FLAG_TOGGLED_ON;
4145 if (run_loader(csp))
4147 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
4148 /* Never get here - LOG_LEVEL_FATAL causes program exit */
4152 if (block_acl(NULL,csp))
4154 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
4155 close_socket(csp->cfd);
4159 #endif /* def FEATURE_ACL */
4161 /* add it to the list of clients */
4162 csp->next = clients->next;
4163 clients->next = csp;
4165 if (config->multi_threaded)
4169 /* this is a switch () statment in the C preprocessor - ugh */
4170 #undef SELECTED_ONE_OPTION
4172 /* Use Pthreads in preference to native code */
4173 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
4174 #define SELECTED_ONE_OPTION
4176 pthread_t the_thread;
4177 pthread_attr_t attrs;
4179 pthread_attr_init(&attrs);
4180 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
4181 errno = pthread_create(&the_thread, &attrs,
4182 (void * (*)(void *))serve, csp);
4183 child_id = errno ? -1 : 0;
4184 pthread_attr_destroy(&attrs);
4188 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
4189 #define SELECTED_ONE_OPTION
4190 child_id = _beginthread(
4191 (void (*)(void *))serve,
4196 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
4197 #define SELECTED_ONE_OPTION
4198 child_id = _beginthread(
4199 (void(* _Optlink)(void*))serve,
4205 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
4206 #define SELECTED_ONE_OPTION
4208 thread_id tid = spawn_thread
4209 (server_thread, "server", B_NORMAL_PRIORITY, csp);
4211 if ((tid >= 0) && (resume_thread(tid) == B_OK))
4213 child_id = (int) tid;
4222 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
4223 #define SELECTED_ONE_OPTION
4224 csp->cfd = ReleaseSocket(csp->cfd, -1);
4227 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4228 NP_Output, Output(),
4229 NP_CloseOutput, FALSE,
4230 NP_Name, (ULONG)"privoxy child",
4234 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4235 NP_Output, Output(),
4236 NP_CloseOutput, FALSE,
4237 NP_Name, (ULONG)"privoxy child",
4238 NP_StackSize, 200*1024,
4244 ((struct Task *)child_id)->tc_UserData = csp;
4245 Signal((struct Task *)child_id, SIGF_SINGLE);
4250 #if !defined(SELECTED_ONE_OPTION)
4253 /* This block is only needed when using fork().
4254 * When using threads, the server thread was
4255 * created and run by the call to _beginthread().
4257 if (child_id == 0) /* child */
4260 #ifdef FEATURE_TOGGLE
4261 int inherited_toggle_state = global_toggle_state;
4262 #endif /* def FEATURE_TOGGLE */
4267 * If we've been toggled or we've blocked the request, tell Mom
4270 #ifdef FEATURE_TOGGLE
4271 if (inherited_toggle_state != global_toggle_state)
4273 rc |= RC_FLAG_TOGGLED;
4275 #endif /* def FEATURE_TOGGLE */
4277 #ifdef FEATURE_STATISTICS
4278 if (csp->flags & CSP_FLAG_REJECTED)
4280 rc |= RC_FLAG_BLOCKED;
4282 #endif /* ndef FEATURE_STATISTICS */
4286 else if (child_id > 0) /* parent */
4288 /* in a fork()'d environment, the parent's
4289 * copy of the client socket and the CSP
4293 #if !defined(_WIN32) && !defined(__CYGWIN__)
4295 wait( &child_status );
4298 * Evaluate child's return code: If the child has
4299 * - been toggled, toggle ourselves
4300 * - blocked its request, bump up the stats counter
4303 #ifdef FEATURE_TOGGLE
4304 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
4306 global_toggle_state = !global_toggle_state;
4308 #endif /* def FEATURE_TOGGLE */
4310 #ifdef FEATURE_STATISTICS
4312 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
4316 #endif /* def FEATURE_STATISTICS */
4318 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
4319 close_socket(csp->cfd);
4320 csp->flags &= ~CSP_FLAG_ACTIVE;
4324 #undef SELECTED_ONE_OPTION
4325 /* end of cpp switch () */
4327 if (child_id < 0) /* failed */
4329 char buf[BUFFER_SIZE];
4331 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
4333 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
4335 write_socket(csp->cfd, buf, strlen(buf));
4336 close_socket(csp->cfd);
4337 csp->flags &= ~CSP_FLAG_ACTIVE;
4348 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
4350 /* Clean up. Aim: free all memory (no leaks) */
4351 #ifdef FEATURE_GRACEFUL_TERMINATION
4353 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
4355 unload_current_config_file();
4356 unload_current_actions_file();
4357 unload_current_re_filterfile();
4358 #ifdef FEATURE_TRUST
4359 unload_current_trust_file();
4362 if (config->multi_threaded)
4369 } while ((clients->next != NULL) && (--i > 0));
4373 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
4384 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
4385 /* Cleanup - remove taskbar icon etc. */
4390 #endif /* FEATURE_GRACEFUL_TERMINATION */