1 const char jcc_rcs[] = "$Id: jcc.c,v 1.217 2009/01/07 19:50:09 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 1.217 2009/01/07 19:50:09 fabiankeil
37 * - If the socket-timeout has been reached and the client
38 * hasn't received any data yet, send an explanation before
39 * closing the connection.
40 * - In get_request_line(), signal timeouts the right way.
42 * Revision 1.216 2008/12/24 22:13:11 ler762
43 * fix GCC 3.4.4 warning
45 * Revision 1.215 2008/12/24 17:06:19 fabiankeil
46 * Keep a thread around to timeout alive connections
47 * even if no new requests are coming in.
49 * Revision 1.214 2008/12/20 14:53:55 fabiankeil
50 * Add config option socket-timeout to control the time
51 * Privoxy waits for data to arrive on a socket. Useful
52 * in case of stale ssh tunnels or when fuzz-testing.
54 * Revision 1.213 2008/12/15 18:45:51 fabiankeil
55 * When logging crunches, log the whole URL, so one can easily
56 * differentiate between vanilla HTTP and CONNECT requests.
58 * Revision 1.212 2008/12/14 15:46:22 fabiankeil
59 * Give crunched requests their own log level.
61 * Revision 1.211 2008/12/06 10:05:03 fabiankeil
62 * Downgrade "Received x bytes while expecting y." message to
63 * LOG_LEVEL_CONNECT as it doesn't necessarily indicate an error.
65 * Revision 1.210 2008/12/02 22:03:18 fabiankeil
66 * Don't miscalculate byte_count if we don't get all the
67 * server headers with one read_socket() call. With keep-alive
68 * support enabled, this caused delays until the server closed
71 * Revision 1.209 2008/11/27 09:44:04 fabiankeil
72 * Cosmetics for the last commit: Don't watch out for
73 * the last chunk if the content isn't chunk-encoded or
74 * if we already determined the content length previously.
76 * Revision 1.208 2008/11/26 18:24:17 fabiankeil
77 * Recognize that the server response is complete if the
78 * last chunk is read together with the server headers.
81 * Revision 1.207 2008/11/25 17:25:16 fabiankeil
82 * Don't convert the client-header list to text until we need to.
84 * Revision 1.206 2008/11/23 17:00:11 fabiankeil
85 * Some more chat() cosmetics.
87 * Revision 1.205 2008/11/16 12:43:49 fabiankeil
88 * Turn keep-alive support into a runtime feature
89 * that is disabled by setting keep-alive-timeout
90 * to a negative value.
92 * Revision 1.204 2008/11/06 19:42:17 fabiankeil
93 * Fix last-chunk detection hack to also apply
94 * if buf[] contains nothing but the last-chunk.
96 * Revision 1.203 2008/11/06 18:34:35 fabiankeil
97 * Factor receive_client_request() and
98 * parse_client_request() out of chat().
100 * Revision 1.202 2008/11/02 18:40:34 fabiankeil
101 * If we received a different amount of data than we expected,
102 * log a warning and make sure the server socket isn't reused.
104 * Revision 1.201 2008/11/02 16:48:20 fabiankeil
105 * Revert revision 1.195 and try again.
107 * Revision 1.200 2008/10/26 16:53:18 fabiankeil
110 * Revision 1.199 2008/10/26 15:36:10 fabiankeil
111 * Remove two debug messages with LOG_LEVEL_INFO.
113 * Revision 1.198 2008/10/22 15:19:55 fabiankeil
114 * Once More, With Feeling: if there is no logfile
115 * because the user didn't specify one, we shouldn't
116 * call init_error_log() after receiving SIGHUP either.
118 * Revision 1.197 2008/10/20 17:02:40 fabiankeil
119 * If SIGHUP is received while we aren't running in daemon
120 * mode, calling init_error_log() would be a mistake.
122 * Revision 1.196 2008/10/16 09:16:41 fabiankeil
123 * - Fix two gcc44 conversion warnings.
124 * - Don't bother logging the last five bytes
127 * Revision 1.195 2008/10/13 16:04:37 fabiankeil
128 * Make sure we don't try to reuse tainted server sockets.
130 * Revision 1.194 2008/10/12 18:35:18 fabiankeil
131 * The last commit was a bit too ambitious, apparently the content
132 * length adjustment is only necessary if we aren't buffering.
134 * Revision 1.193 2008/10/12 15:57:35 fabiankeil
135 * Fix content length calculation if we read headers
136 * and the start of the body at once. Now that we have
137 * FEATURE_CONNECTION_KEEP_ALIVE, it actually matters.
139 * Revision 1.192 2008/10/11 18:19:14 fabiankeil
140 * Even more chat() cosmetics.
142 * Revision 1.191 2008/10/11 18:00:14 fabiankeil
143 * Reformat some comments in chat().
145 * Revision 1.190 2008/10/11 14:58:00 fabiankeil
146 * In case of chunk-encoded content, stop reading if
147 * the buffer looks like it ends with the last chunk.
149 * Revision 1.189 2008/10/11 09:53:00 fabiankeil
150 * Let server_response_is_complete() deal properly with
151 * content that is neither buffered nor read all at once.
153 * Revision 1.188 2008/10/09 18:21:41 fabiankeil
154 * Flush work-in-progress changes to keep outgoing connections
155 * alive where possible. Incomplete and mostly #ifdef'd out.
157 * Revision 1.187 2008/09/07 12:35:05 fabiankeil
158 * Add mutex lock support for _WIN32.
160 * Revision 1.186 2008/09/04 08:13:58 fabiankeil
161 * Prepare for critical sections on Windows by adding a
162 * layer of indirection before the pthread mutex functions.
164 * Revision 1.185 2008/08/30 12:03:07 fabiankeil
165 * Remove FEATURE_COOKIE_JAR.
167 * Revision 1.184 2008/08/22 15:34:45 fabiankeil
168 * - Silence LLVM/Clang complaint.
169 * - Make received_hup_signal static.
170 * - Hide definitions for basedir, pidfile and received_hup_signal
171 * from __EMX__ as they only seem to be used in case of #ifdef unix.
173 * Revision 1.183 2008/08/21 07:09:35 fabiankeil
174 * Accept Shoutcast responses again. Problem reported
175 * and fix suggested by Stefan in #2062860.
177 * Revision 1.182 2008/06/27 11:13:56 fabiankeil
178 * Fix possible NULL-pointer dereference reported
179 * by din_a4 in #2003937. Pointy hat to me.
181 * Revision 1.181 2008/05/21 15:47:15 fabiankeil
182 * Streamline sed()'s prototype and declare
183 * the header parse and add structures static.
185 * Revision 1.180 2008/05/21 15:26:32 fabiankeil
186 * - Mark csp as immutable for send_crunch_response().
187 * - Fix comment spelling.
189 * Revision 1.179 2008/05/20 20:13:32 fabiankeil
190 * Factor update_server_headers() out of sed(), ditch the
191 * first_run hack and make server_patterns_light static.
193 * Revision 1.178 2008/05/10 13:23:38 fabiankeil
194 * Don't provide get_header() with the whole client state
195 * structure when it only needs access to csp->iob.
197 * Revision 1.177 2008/05/10 11:51:12 fabiankeil
198 * Make the "read the rest of the headers" loop a bit more readable.
200 * Revision 1.176 2008/05/10 11:37:57 fabiankeil
201 * - Instead of logging when the IIS5 hack is enabled, log when it fails.
202 * - Remove useless comment.
204 * Revision 1.175 2008/05/09 18:53:59 fabiankeil
205 * Fix comment grammar.
207 * Revision 1.174 2008/05/07 18:05:53 fabiankeil
208 * Remove the pointless buffer in client_protocol_is_unsupported().
210 * Revision 1.173 2008/05/06 15:09:00 fabiankeil
211 * Least-effort fix for bug #1821930 (reported by Lee):
212 * If the response doesn't look like HTTP,
213 * tell the client and log the problem.
215 * Revision 1.172 2008/04/16 16:38:21 fabiankeil
216 * Don't pass the whole csp structure to flush_socket()
217 * when it only needs a file descriptor and a buffer.
219 * Revision 1.171 2008/03/27 18:27:25 fabiankeil
220 * Remove kill-popups action.
222 * Revision 1.170 2008/03/06 16:33:46 fabiankeil
223 * If limit-connect isn't used, don't limit CONNECT requests to port 443.
225 * Revision 1.169 2008/03/04 18:30:39 fabiankeil
226 * Remove the treat-forbidden-connects-like-blocks action. We now
227 * use the "blocked" page for forbidden CONNECT requests by default.
229 * Revision 1.168 2008/03/02 12:25:25 fabiankeil
230 * Also use shiny new connect_port_is_forbidden() in jcc.c.
232 * Revision 1.167 2008/02/23 16:57:12 fabiankeil
233 * Rename url_actions() to get_url_actions() and let it
234 * use the standard parameter ordering.
236 * Revision 1.166 2008/02/23 16:33:43 fabiankeil
237 * Let forward_url() use the standard parameter ordering
238 * and mark its second parameter immutable.
240 * Revision 1.165 2008/02/02 19:36:56 fabiankeil
241 * Remove the "Listening ... for local connections only" log message.
242 * Whether or not remote connections are able to reach Privoxy is up
243 * to the operating system.
245 * Revision 1.164 2007/12/16 18:32:46 fabiankeil
246 * Prevent the log messages for CONNECT requests to unacceptable
247 * ports from printing the limit-connect argument as [null] if
248 * limit-connect hasn't been explicitly enabled.
250 * Revision 1.163 2007/12/13 01:47:11 david__schmidt
251 * Make sure all console-mode apps get a usage() instance
253 * Revision 1.162 2007/12/06 17:54:57 fabiankeil
254 * Reword NO_SERVER_DATA_RESPONSE to make it harder
255 * to misunderstand what the message is all about.
257 * Revision 1.161 2007/12/04 19:44:22 fabiankeil
258 * Unbreak trustfile which previously didn't work without
259 * FEATURE_TOGGLE. Fixes BR#1843585, reported by Lee.
261 * Revision 1.160 2007/11/29 18:00:29 fabiankeil
262 * Plug memory leak. Spotted by Valgrind, triggered by
263 * Privoxy-Regression-Test feeding proxyfuzz.py.
265 * Revision 1.159 2007/11/24 14:34:09 fabiankeil
266 * In the HTTP snipplets, refer to the client as client.
268 * Revision 1.158 2007/11/11 16:44:17 fabiankeil
269 * Emit a log message when activating the MS IIS5 hack.
271 * Revision 1.157 2007/11/03 17:34:49 fabiankeil
272 * Log the "weak randomization factor" warning only
273 * once for mingw32 and provide some more details.
275 * Revision 1.156 2007/11/01 18:20:58 fabiankeil
276 * Initialize log module after initializing mutexes, future
277 * deadlocks in that code should now work cross-platform.
279 * Revision 1.155 2007/10/23 20:12:45 fabiankeil
280 * Fix first CSUCCEED line to end in \r\n as required by RFC1945.
281 * Reported by Bert van Leeuwen in BR#1818808.
283 * Revision 1.154 2007/10/19 17:00:08 fabiankeil
284 * Downgrade "Flushing header and buffers" message to LOG_LEVEL_INFO.
286 * Revision 1.153 2007/10/14 14:12:41 fabiankeil
287 * When in daemon mode, close stderr after the configuration file has been
288 * parsed the first time. If logfile isn't set, stop logging. Fixes BR#897436.
290 * Revision 1.152 2007/10/04 18:03:34 fabiankeil
291 * - Fix a crash when parsing invalid requests whose first header
292 * is rejected by get_header(). Regression (re?)introduced
293 * in r1.143 by yours truly.
294 * - Move ACTION_VANILLA_WAFER handling into parsers.c's
295 * client_cookie_adder() to make sure send-vanilla-wafer can be
296 * controlled through tags (and thus regression-tested).
298 * Revision 1.151 2007/09/29 10:21:16 fabiankeil
299 * - Move get_filter_function() from jcc.c to filters.c
300 * so the filter functions can be static.
301 * - Don't bother filtering body-less responses.
303 * Revision 1.150 2007/09/28 16:39:29 fabiankeil
304 * Execute content filters through execute_content_filter().
306 * Revision 1.149 2007/09/04 15:08:48 fabiankeil
307 * Initialize req to NULL to make sure it's defined if the
308 * first read_socket() call fails. Reported by icmp30.
310 * Revision 1.148 2007/08/26 16:47:13 fabiankeil
311 * Add Stephen Gildea's --pre-chroot-nslookup patch [#1276666],
312 * extensive comments moved to user manual.
314 * Revision 1.147 2007/08/25 14:42:40 fabiankeil
315 * Don't crash if a broken header filter wiped out the request line.
317 * Revision 1.146 2007/08/20 17:09:32 fabiankeil
318 * Fix byte_count calculation in case of flushes
319 * and don't parse the server headers a second time.
321 * Revision 1.145 2007/08/19 13:13:31 fabiankeil
322 * - If there's a connection problem after we already forwarded
323 * parts of the original content, just hang up. Fixes BR#1776724.
324 * - Fix warnings about unused code on mingw32.
325 * - In case of flushes, calculate the byte count
326 * less incorrectly (I think).
328 * Revision 1.144 2007/08/11 14:43:22 fabiankeil
329 * Add some more prototypes for static functions.
331 * Revision 1.143 2007/08/05 13:58:19 fabiankeil
332 * Comment out request_contains_null_bytes() until it's used again.
334 * Revision 1.142 2007/08/05 13:50:26 fabiankeil
335 * #1763173 from Stefan Huehner: s@const static@static const@
336 * and declare some more functions static.
338 * Revision 1.141 2007/08/04 09:56:23 fabiankeil
339 * - Log rejected CONNECT requests with LOG_LEVEL_INFO
340 * and explain why they were rejected in the first place.
341 * - Fix the LOG_LEVEL_CLF message for crunches of unallowed
342 * CONNECT requests. The request line was missing.
343 * - Add two more XXX reminders as we don't have enough already.
345 * Revision 1.140 2007/07/21 11:51:36 fabiankeil
346 * As Hal noticed, checking dispatch_cgi() as the last cruncher
347 * looks like a bug if CGI requests are blocked unintentionally,
348 * so don't do it unless the user enabled the new config option
349 * "allow-cgi-request-crunching".
351 * Revision 1.139 2007/07/14 07:46:41 fabiankeil
352 * - Allow to rewrite the request destination behind the client's back.
353 * - Turn the weird-looking unconditional for loop that
354 * reads the client request into a conditional while loop.
355 * Move the stuff that only runs once out of the loop.
356 * - Move parts of chat(), server_content_type() and the
357 * necessary stuff to fix BR#1750917 into get_filter_function().
359 * Revision 1.138 2007/06/03 18:45:18 fabiankeil
360 * Temporary workaround for BR#1730105.
362 * Revision 1.137 2007/06/01 18:16:36 fabiankeil
363 * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
364 * deadlocks and crashes on OpenBSD and possibly other OS with neither
365 * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
366 * Thanks to Ralf Horstmann for report and solution.
368 * Revision 1.136 2007/06/01 16:41:11 fabiankeil
369 * Add forward-override{} to change the forwarding settings through
370 * action sections. This is mainly interesting to forward different
371 * clients differently (for example based on User-Agent or request
374 * Revision 1.135 2007/05/24 17:03:50 fabiankeil
375 * - Let usage() mention the --chroot parameter.
376 * - Use read_socket() consistently and always leave
377 * the last buffer byte alone, even in cases where
378 * null termination (currently) doesn't matter.
380 * Revision 1.134 2007/05/16 14:59:46 fabiankeil
381 * - Fix config file loading on Unix if no config file is specified.
382 * Since r1.97 Privoxy would always interpret the last argument as
383 * config file, even if it's a valid command line option.
384 * - Abort in case of unrecognized command line options. Closes #1719696.
385 * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
386 * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
388 * Revision 1.133 2007/05/04 11:23:19 fabiankeil
389 * - Don't rerun crunchers that only depend on the request URL.
390 * - Don't count redirects and CGI requests as "blocked requests".
392 * Revision 1.132 2007/04/25 15:15:17 fabiankeil
393 * Support crunching based on tags created by server-header taggers.
395 * Revision 1.131 2007/04/22 13:24:50 fabiankeil
396 * Make HTTP snippets static (again). Add a Content-Type for those
397 * with content so the browser doesn't guess it based on the URL.
399 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
400 * Move crunching and request line rebuilding out of chat().
402 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
403 * Introduce tags as alternative way to specify which
404 * actions apply to a request. At the moment tags can be
405 * created based on client and server headers.
407 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
408 * Don't CLF-log CONNECT requests twice.
410 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
411 * Log the source address for ACL-related connection drops.
413 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
414 * New config option: enforce-blocks.
416 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
417 * - Move null byte check into separate function.
418 * - Don't confuse the client with error pages
419 * if a CONNECT request was already confirmed.
421 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
422 * Speed up NULL byte escaping and only log the complete
423 * NULL byte requests with header debugging enabled.
425 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
426 * Answer requests that contain NULL bytes with
427 * a custom response instead of waiting for more
428 * data until the client eventually hangs up.
430 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
431 * - Move delivery and logging of crunched responses
432 * from chat() into send_crunch_response().
433 * - Display the reason for generating http_responses.
434 * - Log the content length for LOG_LEVEL_CLF correctly
435 * (still incorrect for some fixed responses).
436 * - Reword an incorrect comment about
437 * treat-forbidden-connects-like-blocks violating
439 * - Add some log messages.
441 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
442 * Move mutex initialization into separate
443 * function and exit in case of errors.
445 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
446 * - Start to reduce chat()'s line count and move
447 * parts of it into separate functions.
448 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
450 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
451 * - Add Proxy-Agent header to HTTP snippets that are
452 * supposed to reach HTTP clients only.
453 * - Made a few CONNECT log messages more descriptive.
454 * - Catch completely empty server responses (as seen
455 * with Tor's fake ".noconnect" top level domain).
456 * - Use shiny new "forwarding-failed" template for socks errors.
458 * Revision 1.118 2007/01/07 07:43:43 joergs
459 * AmigaOS4 support added.
461 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
462 * Added config option accept-intercepted-requests
463 * and disabled it by default.
465 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
466 * Reverted parts of my last commit
467 * to keep error handling working.
469 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
470 * Fixed gcc43 conversion warnings.
472 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
473 * Fix -pedantic ISO C warning about converting
474 * from function pointer to object pointer.
476 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
477 * Silence compiler warning I introduced with my last commit.
479 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
480 * Mutex protect rand() if POSIX threading
481 * is used, warn the user if that's not possible
482 * and stop using it on _WIN32 where it could
485 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
486 * Don't prevent core dumps by catching SIGABRT.
487 * It's rude and makes debugging unreasonable painful.
489 * Revision 1.110 2006/12/13 14:52:53 etresoft
490 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
492 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
493 * Privoxy is now able to run as intercepting
494 * proxy in combination with any packet filter
495 * that does the port redirection. The destination
496 * is extracted from the "Host:" header which
497 * should be available for nearly all requests.
499 * Moved HTTP snipplets into jcc.c.
500 * Added error message for gopher proxy requests.
502 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
503 * Only unlink the pidfile if it's actually used.
505 * Change order of interception checks to make
506 * it possible to block or redirect requests for
509 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
510 * Make pthread mutex locking more generic. Instead of
511 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
512 * and use mutex locking unless there is an _r function
513 * available. Better safe than sorry.
515 * Fixes "./configure --disable-pthread" and should result
516 * in less threading-related problems on pthread-using platforms,
517 * but it still doesn't fix BR#1122404.
519 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
520 * Move pthread.h inclusion from jcc.c to jcc.h.
521 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
523 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
524 * Don't exit after receiving the second SIGHUP on Solaris.
526 * Fixes BR 1052235, but the same problem may exist on other
527 * systems. Once 3.0.6 is out we should use sigset()
528 * where available and see if it breaks anything.
530 * Revision 1.104 2006/09/23 13:26:38 roro
531 * Replace TABs by spaces in source code.
533 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
534 * Fix +redirect{}. Didn't work with -fast-redirects.
536 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
537 * Respond with 400 and a short text message
538 * if the client tries to use Privoxy as FTP proxy.
540 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
541 * Make number of retries in case of forwarded-connect problems
542 * a config file option (forwarded-connect-retries) and use 0 as
545 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
546 * Set random(3) seed.
548 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
549 * Follow the OpenBSD port's lead and protect the resolve
550 * functions on OpenBSD as well.
552 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
553 * --user fix. Only use the user as group if no group is specified.
554 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
556 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
557 * Windows service (re-)integration
561 * --install[:service_name]
562 * --uninstall[:service_name]
565 * They work as follows:
566 * --install will create a service for you and then terminate.
567 * By default the service name will be "privoxy" (without the quotes).
568 * However you can run multiple services if you wish, just by adding
569 * a colon and then a name (no spaces).
571 * --uninstall follows the exact same rules a --install.
573 * --service is used when the program is executed by the service
574 * control manager, and in normal circumstances would never be
575 * used as a command line argument.
577 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
578 * Windows service integration
580 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
581 * Incorporate Fabian Keil's patch work:
582 http://www.fabiankeil.de/sourcecode/privoxy/
584 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
585 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
586 * with what was really the latest development (the v_3_0_branch branch)
588 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
589 * Thanks to Jindrich Makovicka for a race condition fix for the log
590 * file. The race condition remains for non-pthread implementations.
591 * Reference patch #1175720.
593 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
594 * Add the ability to check jpeg images for invalid
595 * lengths of comment blocks. Defensive strategy
596 * against the exploit:
597 * Microsoft Security Bulletin MS04-028
598 * Buffer Overrun in JPEG Processing (GDI+) Could
599 * Allow Code Execution (833987)
600 * Enabled with +inspect-jpegs in actions files.
602 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
603 * - Fixed usage info for non-unix platforms
604 * - Fixed small cmdline parsing bug
606 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
607 * Diagnostics: Now preserve the returncode of pthread_create
608 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
610 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
611 * No longer ignore SIGCHLD. Fixes bug #769381
613 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
614 * Close jarfile on graceful exit, remove stray line
616 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
617 * Cosmetics: Killed a warning, a typo and an allocation left at exit
619 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
620 * No longer rely on non-POSIX.1 extensions of getcwd().
623 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
624 * Replaced setenv() by posix-compliant putenv()
625 * Thanks to Neil McCalden (nmcc AT users.sf.net).
627 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
628 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
630 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
631 * Clean-up and extension of improvements for forked mode:
632 * - Child's return code now consists of flags RC_FLAG_*
633 * - Reporting toggle to parent now properly #ifdef'ed
634 * - Children now report blocking to parent. This enables
635 * statistics in forked mode
637 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
638 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
639 * Children now report having been toggled through _exit(17), parents
640 * watch for that code and toggle themselves if found.
642 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
643 * Wrapping all *_r functions (the non-_r versions of them) with
644 * mutex semaphores for OSX. Hopefully this will take care of all
645 * of those pesky crash reports.
647 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
648 * Fixed two mostly harmless mem leaks
650 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
651 * Fix: Head of global clients list now initialized to NULL
653 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
654 * Added basic support for OPTIONS and TRACE HTTP methods:
655 * - New interceptor direct_response() added in chat().
656 * - sed() moved to earlier in the process, so that the
657 * Host: header is evaluated before actions and forwarding
660 * Revision 1.92 2002/05/08 16:00:46 oes
661 * Chat's buffer handling:
662 * - Fixed bug with unchecked out-of-mem conditions
663 * while reading client request & server headers
664 * - No longer predict if the buffer limit will be exceeded
665 * in the next read -- check add_to_iob's new
666 * return code. If buffer couldn't be extended
667 * (policy or out-of-mem) while
668 * - reading from client: abort
669 * - reading server headers: send error page
670 * - buffering server body for filter: flush,
671 * and if that fails: send error page
673 * Revision 1.91 2002/04/08 20:35:58 swa
676 * Revision 1.90 2002/04/02 14:57:28 oes
677 * Made sending wafers independent of FEATURE_COOKIE_JAR
679 * Revision 1.89 2002/03/31 17:18:59 jongfoster
680 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
682 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
683 * More compiler warning message maintenance
685 * Revision 1.87 2002/03/26 22:29:54 swa
686 * we have a new homepage!
688 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
689 * Workaround for closing the jarfile before load_config() comes around again
691 * Revision 1.85 2002/03/24 15:23:33 jongfoster
694 * Revision 1.84 2002/03/24 13:25:43 swa
695 * name change related issues
697 * Revision 1.83 2002/03/16 23:54:06 jongfoster
698 * Adding graceful termination feature, to help look for memory leaks.
699 * If you enable this (which, by design, has to be done by hand
700 * editing config.h) and then go to http://i.j.b/die, then the program
701 * will exit cleanly after the *next* request. It should free all the
702 * memory that was used.
704 * Revision 1.82 2002/03/13 00:27:05 jongfoster
707 * Revision 1.81 2002/03/12 01:42:50 oes
708 * Introduced modular filters
710 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
711 * OS/2 port maintenance:
712 * - Fixed EMX build - it had decayed a little
713 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
714 * substituted a memset for now.
716 * Revision 1.79 2002/03/09 20:03:52 jongfoster
717 * - Making various functions return int rather than size_t.
718 * (Undoing a recent change). Since size_t is unsigned on
719 * Windows, functions like read_socket that return -1 on
720 * error cannot return a size_t.
722 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
723 * crashes, and also frequently caused JB to jump to 100%
724 * CPU and stay there. (Because it thought it had just
725 * read ((unsigned)-1) == 4Gb of data...)
727 * - The signature of write_socket has changed, it now simply
728 * returns success=0/failure=nonzero.
730 * - Trying to get rid of a few warnings --with-debug on
731 * Windows, I've introduced a new type "jb_socket". This is
732 * used for the socket file descriptors. On Windows, this
733 * is SOCKET (a typedef for unsigned). Everywhere else, it's
734 * an int. The error value can't be -1 any more, so it's
735 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
736 * Windows it maps to the #define INVALID_SOCKET.)
738 * - The signature of bind_port has changed.
740 * Revision 1.78 2002/03/08 21:35:04 oes
741 * Added optional group supplement to --user option. Will now use default group of user if no group given
743 * Revision 1.77 2002/03/07 03:52:06 oes
744 * - Fixed compiler warnings etc
745 * - Improved handling of failed DNS lookups
747 * Revision 1.76 2002/03/06 22:54:35 jongfoster
748 * Automated function-comment nitpicking.
750 * Revision 1.75 2002/03/06 10:02:19 oes
751 * Fixed stupid bug when --user was not given
753 * Revision 1.74 2002/03/06 00:49:31 jongfoster
754 * Fixing warning on Windows
755 * Making #ifdefs that refer to the same variable consistently
756 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
758 * Revision 1.73 2002/03/05 23:57:30 hal9
759 * Stray character 's' on line 1618 was breaking build.
761 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
762 * - Re-enable OS/2 building after new parms were added
763 * - Fix false out of memory report when resolving CGI templates when no IP
764 * address is available of failed attempt (a la no such domain)
766 * Revision 1.71 2002/03/05 18:13:56 oes
767 * Added --user option
769 * Revision 1.70 2002/03/05 04:52:42 oes
770 * Deleted non-errlog debugging code
772 * Revision 1.69 2002/03/04 23:50:00 jongfoster
773 * Splitting off bind_port() call into bind_port_helper(), with
776 * Revision 1.68 2002/03/04 20:17:32 oes
779 * Revision 1.67 2002/03/04 18:18:57 oes
780 * - Removed _DEBUG mode
781 * - Cleand up cmdline parsing
782 * - Introduced --no-daemon, --pidfile options
783 * - Cleaned up signal handling:
784 * - Terminate cleanly on INT, TERM and ABRT
785 * - Schedule logfile for re-opening on HUP
786 * - Ignore CHLD and PIPE
787 * - Leave the rest with their default handlers
788 * - Uniform handler registration
789 * - Added usage() function
790 * - Played styleguide police
792 * Revision 1.66 2002/03/03 15:06:55 oes
793 * Re-enabled automatic config reloading
795 * Revision 1.65 2002/03/03 14:49:11 oes
796 * Fixed CLF logging: Now uses client's original HTTP request
798 * Revision 1.64 2002/03/03 09:18:03 joergs
799 * Made jumbjuster work on AmigaOS again.
801 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
802 * Clean up a little CRLF unpleasantness that suddenly appeared
804 * Revision 1.62 2002/02/20 23:17:23 jongfoster
805 * Detecting some out-of memory conditions and exiting with a log message.
807 * Revision 1.61 2002/01/17 21:01:52 jongfoster
808 * Moving all our URL and URL pattern parsing code to urlmatch.c.
810 * Revision 1.60 2001/12/30 14:07:32 steudten
811 * - Add signal handling (unix)
812 * - Add SIGHUP handler (unix)
813 * - Add creation of pidfile (unix)
814 * - Add action 'top' in rc file (RH)
815 * - Add entry 'SIGNALS' to manpage
816 * - Add exit message to logfile (unix)
818 * Revision 1.59 2001/12/13 14:07:18 oes
819 * Fixed Bug: 503 error page now sent OK
821 * Revision 1.58 2001/11/30 23:37:24 jongfoster
822 * Renaming the Win32 config file to config.txt - this is almost the
823 * same as the corresponding UNIX name "config"
825 * Revision 1.57 2001/11/16 00:47:43 jongfoster
826 * Changing the tty-disconnection code to use setsid().
828 * Revision 1.56 2001/11/13 20:20:54 jongfoster
829 * Tabs->spaces, fixing a bug with missing {} around an if()
831 * Revision 1.55 2001/11/13 20:14:53 jongfoster
832 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
834 * Revision 1.54 2001/11/07 00:03:14 steudten
835 * Give reliable return value if an error
836 * occurs not just 0 with new daemon mode.
838 * Revision 1.53 2001/11/05 21:41:43 steudten
839 * Add changes to be a real daemon just for unix os.
840 * (change cwd to /, detach from controlling tty, set
841 * process group and session leader to the own process.
843 * Add some fatal-error log message for failed malloc().
844 * Add '-d' if compiled with 'configure --with-debug' to
845 * enable debug output.
847 * Revision 1.52 2001/10/26 20:11:20 jongfoster
848 * Fixing type mismatch
850 * Revision 1.51 2001/10/26 17:38:28 oes
853 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
854 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
855 * threads to call select() simultaneously. So, it's time to do a real, live,
856 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
857 * (native). Both versions will work, but using __OS2__ offers multi-threading.
859 * Revision 1.49 2001/10/23 21:41:35 jongfoster
860 * Added call to initialize the (statically-allocated of course)
861 * "out of memory" CGI response.
863 * Revision 1.48 2001/10/10 19:56:46 jongfoster
864 * Moving some code that wasn't cookie-related out of an #ifdef
867 * Revision 1.47 2001/10/10 16:44:36 oes
868 * Added CONNECT destination port limitation check
870 * Revision 1.46 2001/10/08 15:17:41 oes
871 * Re-enabled SSL forwarding
873 * Revision 1.45 2001/10/07 15:42:11 oes
874 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
876 * Moved downgrading of the HTTP version from parse_http_request to
877 * chat(), since we can't decide if it is necessary before we have
878 * determined the actions for the URL. The HTTP command is now
879 * *always* re-built so the repairs need no longer be special-cased.
881 * filter_popups now gets a csp pointer so it can raise the new
882 * CSP_FLAG_MODIFIED flag.
886 * Added configurable size limit for the IOB. If the IOB grows so
887 * large that the next read would exceed the limit, the header
888 * is generated, and the header & unfiltered buffer are flushed
889 * to the client. Chat then continues in non-buffering,
890 * non-filtering body mode.
892 * Revision 1.44 2001/10/02 18:13:57 oes
895 * Revision 1.43 2001/10/02 15:32:13 oes
896 * Moved generation of hdr
898 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
899 * Cleaning up 2 compiler warnings on OS/2.
901 * Revision 1.41 2001/09/16 17:05:14 jongfoster
902 * Removing unused #include showarg.h
904 * Revision 1.40 2001/09/16 15:41:45 jongfoster
905 * Fixing signed/unsigned comparison warning.
907 * Revision 1.39 2001/09/16 13:21:27 jongfoster
908 * Changes to use new list functions.
910 * Revision 1.38 2001/09/16 13:01:46 jongfoster
911 * Removing redundant function call that zeroed zalloc()'d memory.
913 * Revision 1.37 2001/09/10 11:12:24 oes
914 * Deleted unused variable
916 * Revision 1.36 2001/09/10 10:56:15 oes
917 * Silenced compiler warnings
919 * Revision 1.35 2001/07/31 14:44:22 oes
920 * Deleted unused size parameter from filter_popups()
922 * Revision 1.34 2001/07/30 22:08:36 jongfoster
923 * Tidying up #defines:
924 * - All feature #defines are now of the form FEATURE_xxx
925 * - Permanently turned off WIN_GUI_EDIT
926 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
928 * Revision 1.33 2001/07/29 19:32:00 jongfoster
929 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
931 * Revision 1.32 2001/07/29 18:47:05 jongfoster
932 * Adding missing #include "loadcfg.h"
934 * Revision 1.31 2001/07/29 12:17:48 oes
935 * Applied pthread fix by Paul Lieverse
937 * Revision 1.30 2001/07/25 22:57:13 jongfoster
938 * __BEOS__ no longer overrides FEATURE_PTHREAD.
939 * This is because FEATURE_PTHREAD will soon be widely used, so I
940 * want to keep it simple.
942 * Revision 1.29 2001/07/24 12:47:06 oes
943 * Applied BeOS support update by Eugenia
945 * Revision 1.28 2001/07/23 13:26:12 oes
946 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
948 * Revision 1.27 2001/07/19 19:09:47 haroon
949 * - Added code to take care of the situation where while processing the first
950 * server response (which includes the server header), after finding the end
951 * of the headers we were not looking past the end of the headers for
952 * content modification. I enabled it for filter_popups.
953 * Someone else should look to see if other similar operations should be
954 * done to the discarded portion of the buffer.
956 * Note 2001/07/20: No, the other content modification mechanisms will process
957 * the whole iob later anyway. --oes
959 * Revision 1.26 2001/07/18 12:31:36 oes
962 * Revision 1.25 2001/07/15 19:43:49 jongfoster
963 * Supports POSIX threads.
964 * Also removed some unused #includes.
966 * Revision 1.24 2001/07/13 14:00:40 oes
967 * - Generic content modification scheme:
968 * Each feature has its own applicability flag that is set
969 * from csp->action->flags.
970 * Replaced the "filtering" int flag , by a function pointer
971 * "content_filter" to the function that will do the content
972 * modification. If it is != NULL, the document will be buffered
973 * and processed through *content_filter, which must set
974 * csp->content_length and return a modified copy of the body
975 * or return NULL (on failiure).
976 * - Changed csp->is_text to the more generic bitmap csp->content_type
977 * which can currently take the valued CT_TEXT or CT_GIF
979 * - Removed all #ifdef PCRS
981 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
982 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
983 * the `block_acl' call. This prevents a compilation error when the user
984 * does not wish to use the "ACL" feature.
986 * Revision 1.22 2001/06/29 21:45:41 oes
987 * Indentation, CRLF->LF, Tab-> Space
989 * Revision 1.21 2001/06/29 13:29:36 oes
990 * - Cleaned up, improved comments
991 * - Unified all possible interceptors (CGI,
992 * block, trust, fast_redirect) in one
993 * place, with one (CGI) answer generation
994 * mechansim. Much clearer now.
995 * - Removed the GIF image generation, which
996 * is now done in filters.c:block_url()
997 * - Made error conditions like domain lookup
998 * failiure or (various) problems while talking
999 * to the server use cgi.c:error_response()
1000 * instead of generating HTML/HTTP in chat() (yuck!)
1001 * - Removed logentry from cancelled commit
1003 * Revision 1.20 2001/06/09 10:55:28 jongfoster
1004 * Changing BUFSIZ ==> BUFFER_SIZE
1006 * Revision 1.19 2001/06/07 23:12:52 jongfoster
1007 * Replacing function pointer in struct gateway with a directly
1008 * called function forwarded_connect().
1009 * Replacing struct gateway with struct forward_spec
1011 * Revision 1.18 2001/06/03 19:12:16 oes
1012 * introduced new cgi handling
1014 * Revision 1.17 2001/06/01 20:07:23 jongfoster
1015 * Now uses action +image-blocker{} rather than config->tinygif
1017 * Revision 1.16 2001/06/01 18:49:17 jongfoster
1018 * Replaced "list_share" with "list" - the tiny memory gain was not
1019 * worth the extra complexity.
1021 * Revision 1.15 2001/05/31 21:24:47 jongfoster
1022 * Changed "permission" to "action" throughout.
1023 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
1024 * Moved vanilla wafer check into chat(), since we must now
1025 * decide whether or not to add it based on the URL.
1027 * Revision 1.14 2001/05/29 20:14:01 joergs
1028 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
1031 * Revision 1.13 2001/05/29 09:50:24 jongfoster
1032 * Unified blocklist/imagelist/permissionslist.
1033 * File format is still under discussion, but the internal changes
1034 * are (mostly) done.
1036 * Also modified interceptor behaviour:
1037 * - We now intercept all URLs beginning with one of the following
1038 * prefixes (and *only* these prefixes):
1040 * * http://ijbswa.sf.net/config/
1041 * * http://ijbswa.sourceforge.net/config/
1042 * - New interceptors "home page" - go to http://i.j.b/ to see it.
1043 * - Internal changes so that intercepted and fast redirect pages
1044 * are not replaced with an image.
1045 * - Interceptors now have the option to send a binary page direct
1046 * to the client. (i.e. ijb-send-banner uses this)
1047 * - Implemented show-url-info interceptor. (Which is why I needed
1048 * the above interceptors changes - a typical URL is
1049 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
1050 * The previous mechanism would not have intercepted that, and
1051 * if it had been intercepted then it then it would have replaced
1052 * it with an image.)
1054 * Revision 1.12 2001/05/27 22:17:04 oes
1056 * - re_process_buffer no longer writes the modified buffer
1057 * to the client, which was very ugly. It now returns the
1058 * buffer, which it is then written by chat.
1060 * - content_length now adjusts the Content-Length: header
1061 * for modified documents rather than crunch()ing it.
1062 * (Length info in csp->content_length, which is 0 for
1063 * unmodified documents)
1065 * - For this to work, sed() is called twice when filtering.
1067 * Revision 1.11 2001/05/26 17:27:53 jongfoster
1068 * Added support for CLF and fixed LOG_LEVEL_LOG.
1069 * Also did CRLF->LF fix of my previous patch.
1071 * Revision 1.10 2001/05/26 15:26:15 jongfoster
1072 * ACL feature now provides more security by immediately dropping
1073 * connections from untrusted hosts.
1075 * Revision 1.9 2001/05/26 00:28:36 jongfoster
1076 * Automatic reloading of config file.
1077 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
1078 * Most of the global variables have been moved to a new
1079 * struct configuration_spec, accessed through csp->config->globalname
1080 * Most of the globals remaining are used by the Win32 GUI.
1082 * Revision 1.8 2001/05/25 22:43:18 jongfoster
1083 * Fixing minor memory leak and buffer overflow.
1085 * Revision 1.7 2001/05/25 22:34:30 jongfoster
1088 * Revision 1.6 2001/05/23 00:13:58 joergs
1089 * AmigaOS support fixed.
1091 * Revision 1.5 2001/05/22 18:46:04 oes
1093 * - Enabled filtering banners by size rather than URL
1094 * by adding patterns that replace all standard banner
1095 * sizes with the "Junkbuster" gif to the re_filterfile
1097 * - Enabled filtering WebBugs by providing a pattern
1098 * which kills all 1x1 images
1100 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
1101 * which is selected by the (nonstandard and therefore
1102 * capital) letter 'U' in the option string.
1103 * It causes the quantifiers to be ungreedy by default.
1104 * Appending a ? turns back to greedy (!).
1106 * - Added a new interceptor ijb-send-banner, which
1107 * sends back the "Junkbuster" gif. Without imagelist or
1108 * MSIE detection support, or if tinygif = 1, or the
1109 * URL isn't recognized as an imageurl, a lame HTML
1110 * explanation is sent instead.
1112 * - Added new feature, which permits blocking remote
1113 * script redirects and firing back a local redirect
1115 * The feature is conditionally compiled, i.e. it
1116 * can be disabled with --disable-fast-redirects,
1117 * plus it must be activated by a "fast-redirects"
1118 * line in the config file, has its own log level
1119 * and of course wants to be displayed by show-proxy-args
1120 * Note: Boy, all the #ifdefs in 1001 locations and
1121 * all the fumbling with configure.in and acconfig.h
1122 * were *way* more work than the feature itself :-(
1124 * - Because a generic redirect template was needed for
1125 * this, tinygif = 3 now uses the same.
1127 * - Moved GIFs, and other static HTTP response templates
1130 * - Some minor fixes
1132 * - Removed some >400 CRs again (Jon, you really worked
1135 * Revision 1.4 2001/05/21 19:34:01 jongfoster
1136 * Made failure to bind() a fatal error.
1138 * Revision 1.3 2001/05/20 01:21:20 jongfoster
1139 * Version 2.9.4 checkin.
1140 * - Merged popupfile and cookiefile, and added control over PCRS
1141 * filtering, in new "permissionsfile".
1142 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
1143 * file error you now get a message box (in the Win32 GUI) rather
1144 * than the program exiting with no explanation.
1145 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
1147 * - Removed tabs from "config"
1148 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
1149 * - Bumped up version number.
1151 * Revision 1.2 2001/05/17 22:34:44 oes
1152 * - Added hint on GIF char array generation to jcc.c
1153 * - Cleaned CRLF's from the sources and related files
1154 * - Repaired logging for REF and FRC
1156 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
1157 * Initial import of version 2.9.3 source tree
1160 *********************************************************************/
1166 #include <sys/types.h>
1175 # ifndef FEATURE_PTHREAD
1179 # include <windows.h>
1180 # include <process.h>
1181 # endif /* ndef FEATURE_PTHREAD */
1184 # ifndef _WIN_CONSOLE
1185 # include "w32log.h"
1186 # endif /* ndef _WIN_CONSOLE */
1187 # include "w32svrapi.h"
1189 #else /* ifndef _WIN32 */
1191 # if !defined (__OS2__)
1192 # include <unistd.h>
1193 # include <sys/wait.h>
1194 # endif /* ndef __OS2__ */
1195 # include <sys/time.h>
1196 # include <sys/stat.h>
1197 # include <sys/ioctl.h>
1200 #include <sys/termios.h>
1208 # include <signal.h>
1211 # include <socket.h> /* BeOS has select() for sockets only. */
1212 # include <OS.h> /* declarations for threads and stuff. */
1215 # if defined(__EMX__) || defined(__OS2__)
1216 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
1221 #define bzero(B,N) memset(B,0x00,n)
1225 # include <select.h>
1230 #include "project.h"
1233 #include "filters.h"
1234 #include "loaders.h"
1235 #include "parsers.h"
1236 #include "miscutil.h"
1238 #include "jbsockets.h"
1239 #include "gateway.h"
1240 #include "actions.h"
1242 #include "loadcfg.h"
1243 #include "urlmatch.h"
1245 const char jcc_h_rcs[] = JCC_H_VERSION;
1246 const char project_h_rcs[] = PROJECT_H_VERSION;
1249 struct client_state clients[1];
1250 struct file_list files[1];
1252 #ifdef FEATURE_STATISTICS
1253 int urls_read = 0; /* total nr of urls read inc rejected */
1254 int urls_rejected = 0; /* total nr of urls rejected */
1255 #endif /* def FEATURE_STATISTICS */
1257 #ifdef FEATURE_GRACEFUL_TERMINATION
1258 int g_terminate = 0;
1261 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1262 static void sig_handler(int the_signal);
1264 static int client_protocol_is_unsupported(const struct client_state *csp, char *req);
1265 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
1266 static jb_err get_server_headers(struct client_state *csp);
1267 static const char *crunch_reason(const struct http_response *rsp);
1268 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp);
1269 static char *get_request_line(struct client_state *csp);
1270 static jb_err receive_client_request(struct client_state *csp);
1271 static jb_err parse_client_request(struct client_state *csp);
1272 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
1273 static jb_err change_request_destination(struct client_state *csp);
1274 static void chat(struct client_state *csp);
1275 static void serve(struct client_state *csp);
1276 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1277 static void usage(const char *myname);
1279 static void initialize_mutexes(void);
1280 static jb_socket bind_port_helper(struct configuration_spec *config);
1281 static void listen_loop(void);
1284 void serve(struct client_state *csp);
1285 #else /* ifndef AMIGA */
1286 static void serve(struct client_state *csp);
1287 #endif /* def AMIGA */
1290 static int32 server_thread(void *data);
1291 #endif /* def __BEOS__ */
1294 #define sleep(N) Sleep(((N) * 1000))
1298 #define sleep(N) DosSleep(((N) * 100))
1301 #ifdef MUTEX_LOCKS_AVAILABLE
1303 * XXX: Does the locking stuff really belong in this file?
1305 privoxy_mutex_t log_mutex;
1306 privoxy_mutex_t log_init_mutex;
1307 privoxy_mutex_t connection_reuse_mutex;
1309 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
1310 privoxy_mutex_t resolver_mutex;
1311 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
1313 #ifndef HAVE_GMTIME_R
1314 privoxy_mutex_t gmtime_mutex;
1315 #endif /* ndef HAVE_GMTIME_R */
1317 #ifndef HAVE_LOCALTIME_R
1318 privoxy_mutex_t localtime_mutex;
1319 #endif /* ndef HAVE_GMTIME_R */
1322 privoxy_mutex_t rand_mutex;
1323 #endif /* ndef HAVE_RANDOM */
1325 #endif /* def MUTEX_LOCKS_AVAILABLE */
1328 const char *basedir = NULL;
1329 const char *pidfile = NULL;
1330 static int received_hup_signal = 0;
1331 #endif /* defined unix */
1333 /* HTTP snipplets. */
1334 static const char CSUCCEED[] =
1335 "HTTP/1.0 200 Connection established\r\n"
1336 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
1338 static const char CHEADER[] =
1339 "HTTP/1.0 400 Invalid header received from client\r\n"
1340 "Proxy-Agent: Privoxy " VERSION "\r\n"
1341 "Content-Type: text/plain\r\n"
1342 "Connection: close\r\n\r\n"
1343 "Invalid header received from client.\r\n";
1345 static const char FTP_RESPONSE[] =
1346 "HTTP/1.0 400 Invalid request received from client\r\n"
1347 "Content-Type: text/plain\r\n"
1348 "Connection: close\r\n\r\n"
1349 "Invalid request. Privoxy doesn't support FTP.\r\n";
1351 static const char GOPHER_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 gopher.\r\n";
1357 /* XXX: should be a template */
1358 static const char MISSING_DESTINATION_RESPONSE[] =
1359 "HTTP/1.0 400 Bad request received from client\r\n"
1360 "Proxy-Agent: Privoxy " VERSION "\r\n"
1361 "Content-Type: text/plain\r\n"
1362 "Connection: close\r\n\r\n"
1363 "Bad request. Privoxy was unable to extract the destination.\r\n";
1365 /* XXX: should be a template */
1366 static const char NO_SERVER_DATA_RESPONSE[] =
1367 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1368 "Proxy-Agent: Privoxy " VERSION "\r\n"
1369 "Content-Type: text/plain\r\n"
1370 "Connection: close\r\n\r\n"
1371 "Empty server or forwarder response.\r\n"
1372 "The connection has been closed but Privoxy didn't receive any data.\r\n";
1374 /* XXX: should be a template */
1375 static const char INVALID_SERVER_HEADERS_RESPONSE[] =
1376 "HTTP/1.0 502 Server or forwarder response invalid\r\n"
1377 "Proxy-Agent: Privoxy " VERSION "\r\n"
1378 "Content-Type: text/plain\r\n"
1379 "Connection: close\r\n\r\n"
1380 "Bad response. The server or forwarder response doesn't look like HTTP.\r\n";
1383 /* XXX: should be a template */
1384 static const char NULL_BYTE_RESPONSE[] =
1385 "HTTP/1.0 400 Bad request received from client\r\n"
1386 "Proxy-Agent: Privoxy " VERSION "\r\n"
1387 "Content-Type: text/plain\r\n"
1388 "Connection: close\r\n\r\n"
1389 "Bad request. Null byte(s) before end of request.\r\n";
1392 /* XXX: should be a template */
1393 static const char MESSED_UP_REQUEST_RESPONSE[] =
1394 "HTTP/1.0 400 Malformed request after rewriting\r\n"
1395 "Proxy-Agent: Privoxy " VERSION "\r\n"
1396 "Content-Type: text/plain\r\n"
1397 "Connection: close\r\n\r\n"
1398 "Bad request. Messed up with header filters.\r\n";
1400 /* XXX: should be a template */
1401 static const char CONNECTION_TIMEOUT_RESPONSE[] =
1402 "HTTP/1.0 502 Connection timeout\r\n"
1403 "Proxy-Agent: Privoxy " VERSION "\r\n"
1404 "Content-Type: text/plain\r\n"
1405 "Connection: close\r\n\r\n"
1406 "The connection timed out.\r\n";
1408 /* A function to crunch a response */
1409 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
1411 /* Crunch function flags */
1412 #define CF_NO_FLAGS 0
1413 /* Cruncher applies to forced requests as well */
1414 #define CF_IGNORE_FORCE 1
1415 /* Crunched requests are counted for the block statistics */
1416 #define CF_COUNT_AS_REJECT 2
1418 /* A crunch function and its flags */
1421 const crunch_func_ptr cruncher;
1425 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
1427 /* Complete list of cruncher functions */
1428 static const struct cruncher crunchers_all[] = {
1429 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
1430 { block_url, CF_COUNT_AS_REJECT },
1431 #ifdef FEATURE_TRUST
1432 { trust_url, CF_COUNT_AS_REJECT },
1433 #endif /* def FEATURE_TRUST */
1434 { redirect_url, CF_NO_FLAGS },
1435 { dispatch_cgi, CF_IGNORE_FORCE},
1439 /* Light version, used after tags are applied */
1440 static const struct cruncher crunchers_light[] = {
1441 { block_url, CF_COUNT_AS_REJECT },
1442 { redirect_url, CF_NO_FLAGS },
1448 * XXX: Don't we really mean
1454 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1455 /*********************************************************************
1457 * Function : sig_handler
1459 * Description : Signal handler for different signals.
1460 * Exit gracefully on TERM and INT
1461 * or set a flag that will cause the errlog
1462 * to be reopened by the main thread on HUP.
1465 * 1 : the_signal = the signal cause this function to call
1469 *********************************************************************/
1470 static void sig_handler(int the_signal)
1476 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1488 received_hup_signal = 1;
1494 * We shouldn't be here, unless we catch signals
1495 * in main() that we can't handle here!
1497 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1505 /*********************************************************************
1507 * Function : client_protocol_is_unsupported
1509 * Description : Checks if the client used a known unsupported
1510 * protocol and deals with it by sending an error
1514 * 1 : csp = Current client state (buffers, headers, etc...)
1515 * 2 : req = the first request line send by the client
1517 * Returns : TRUE if an error response has been generated, or
1518 * FALSE if the request doesn't look invalid.
1520 *********************************************************************/
1521 static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1524 * If it's a FTP or gopher request, we don't support it.
1526 * These checks are better than nothing, but they might
1527 * not work in all configurations and some clients might
1528 * have problems digesting the answer.
1530 * They should, however, never cause more problems than
1531 * Privoxy's old behaviour (returning the misleading HTML
1534 * "Could not resolve http://(ftp|gopher)://example.org").
1536 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1538 const char *response = NULL;
1539 const char *protocol = NULL;
1541 if (!strncmpic(req, "GET ftp://", 10))
1543 response = FTP_RESPONSE;
1548 response = GOPHER_RESPONSE;
1549 protocol = "GOPHER";
1551 log_error(LOG_LEVEL_ERROR,
1552 "%s tried to use Privoxy as %s proxy: %s",
1553 csp->ip_addr_str, protocol, req);
1554 log_error(LOG_LEVEL_CLF,
1555 "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1557 write_socket(csp->cfd, response, strlen(response));
1566 /*********************************************************************
1568 * Function : get_request_destination_elsewhere
1570 * Description : If the client's request was redirected into
1571 * Privoxy without the client's knowledge,
1572 * the request line lacks the destination host.
1574 * This function tries to get it elsewhere,
1575 * provided accept-intercepted-requests is enabled.
1577 * "Elsewhere" currently only means "Host: header",
1578 * but in the future we may ask the redirecting
1579 * packet filter to look the destination up.
1581 * If the destination stays unknown, an error
1582 * response is send to the client and headers
1583 * are freed so that chat() can return directly.
1586 * 1 : csp = Current client state (buffers, headers, etc...)
1587 * 2 : headers = a header list
1589 * Returns : JB_ERR_OK if the destination is now known, or
1590 * JB_ERR_PARSE if it isn't.
1592 *********************************************************************/
1593 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1597 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1599 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1600 " Privoxy isn't configured to accept intercepted requests.",
1601 csp->ip_addr_str, csp->http->cmd);
1602 /* XXX: Use correct size */
1603 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1604 csp->ip_addr_str, csp->http->cmd);
1606 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1607 destroy_list(headers);
1609 return JB_ERR_PARSE;
1611 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1613 /* Split the domain we just got for pattern matching */
1614 init_domain_components(csp->http);
1620 /* We can't work without destination. Go spread the news.*/
1622 req = list_to_text(headers);
1624 /* XXX: Use correct size */
1625 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1626 csp->ip_addr_str, csp->http->cmd);
1627 log_error(LOG_LEVEL_ERROR,
1628 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1629 csp->ip_addr_str, csp->http->cmd, req);
1632 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
1633 destroy_list(headers);
1635 return JB_ERR_PARSE;
1638 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1639 * to get the destination IP address, use it as host directly
1640 * or do a reverse DNS lookup first.
1645 /*********************************************************************
1647 * Function : get_server_headers
1649 * Description : Parses server headers in iob and fills them
1650 * into csp->headers so that they can later be
1654 * 1 : csp = Current client state (buffers, headers, etc...)
1656 * Returns : JB_ERR_OK if everything went fine, or
1657 * JB_ERR_PARSE if the headers were incomplete.
1659 *********************************************************************/
1660 static jb_err get_server_headers(struct client_state *csp)
1662 int continue_hack_in_da_house = 0;
1665 while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
1670 * continue hack in da house. Ignore the ending of
1671 * this head and continue enlisting header lines.
1672 * The reason is described below.
1674 enlist(csp->headers, "");
1675 continue_hack_in_da_house = 0;
1678 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1681 * It's a bodyless continue response, don't
1682 * stop header parsing after reaching its end.
1684 * As a result Privoxy will concatenate the
1685 * next response's head and parse and deliver
1686 * the headers as if they belonged to one request.
1688 * The client will separate them because of the
1689 * empty line between them.
1691 * XXX: What we're doing here is clearly against
1692 * the intended purpose of the continue header,
1693 * and under some conditions (HTTP/1.0 client request)
1694 * it's a standard violation.
1696 * Anyway, "sort of against the spec" is preferable
1697 * to "always getting confused by Continue responses"
1698 * (Privoxy's behaviour before this hack was added)
1700 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1701 continue_hack_in_da_house = 1;
1703 else if (*header == '\0')
1706 * If the header is empty, but the Continue hack
1707 * isn't active, we can assume that we reached the
1708 * end of the buffer before we hit the end of the
1711 * Inform the caller an let it decide how to handle it.
1713 return JB_ERR_PARSE;
1716 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1719 * XXX: Should we quit the request and return a
1720 * out of memory error page instead?
1722 log_error(LOG_LEVEL_ERROR,
1723 "Out of memory while enlisting server headers. %s lost.",
1733 /*********************************************************************
1735 * Function : crunch_reason
1737 * Description : Translates the crunch reason code into a string.
1740 * 1 : rsp = a http_response
1742 * Returns : A string with the crunch reason or an error description.
1744 *********************************************************************/
1745 static const char *crunch_reason(const struct http_response *rsp)
1747 char * reason = NULL;
1749 assert(rsp != NULL);
1752 return "Internal error while searching for crunch reason";
1755 switch (rsp->reason)
1757 case RSP_REASON_UNSUPPORTED:
1758 reason = "Unsupported HTTP feature";
1760 case RSP_REASON_BLOCKED:
1763 case RSP_REASON_UNTRUSTED:
1764 reason = "Untrusted";
1766 case RSP_REASON_REDIRECTED:
1767 reason = "Redirected";
1769 case RSP_REASON_CGI_CALL:
1770 reason = "CGI Call";
1772 case RSP_REASON_NO_SUCH_DOMAIN:
1773 reason = "DNS failure";
1775 case RSP_REASON_FORWARDING_FAILED:
1776 reason = "Forwarding failed";
1778 case RSP_REASON_CONNECT_FAILED:
1779 reason = "Connection failure";
1781 case RSP_REASON_OUT_OF_MEMORY:
1782 reason = "Out of memory (may mask other reasons)";
1785 reason = "No reason recorded";
1793 /*********************************************************************
1795 * Function : send_crunch_response
1797 * Description : Delivers already prepared response for
1798 * intercepted requests, logs the interception
1799 * and frees the response.
1802 * 1 : csp = Current client state (buffers, headers, etc...)
1803 * 1 : rsp = Fully prepared response. Will be freed on exit.
1805 * Returns : Nothing.
1807 *********************************************************************/
1808 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp)
1810 const struct http_request *http = csp->http;
1811 char status_code[4];
1813 assert(rsp != NULL);
1814 assert(rsp->head != NULL);
1819 * Not supposed to happen. If it does
1820 * anyway, treat it as an unknown error.
1822 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1823 /* return code doesn't matter */
1828 /* If rsp is still NULL, we have serious internal problems. */
1829 log_error(LOG_LEVEL_FATAL,
1830 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1834 * Extract the status code from the actual head
1835 * that was send to the client. It is the only
1836 * way to get it right for all requests, including
1837 * the fixed ones for out-of-memory problems.
1839 * A head starts like this: 'HTTP/1.1 200...'
1843 status_code[0] = rsp->head[9];
1844 status_code[1] = rsp->head[10];
1845 status_code[2] = rsp->head[11];
1846 status_code[3] = '\0';
1848 /* Write the answer to the client */
1849 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1850 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1852 /* There is nothing we can do about it. */
1853 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1856 /* Log that the request was crunched and why. */
1857 log_error(LOG_LEVEL_CRUNCH, "%s: %s", crunch_reason(rsp), http->url);
1858 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %d",
1859 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1861 /* Clean up and return */
1862 if (cgi_error_memory() != rsp)
1864 free_http_response(rsp);
1871 /*********************************************************************
1873 * Function : request_contains_null_bytes
1875 * Description : Checks for NULL bytes in the request and sends
1876 * an error message to the client if any were found.
1878 * XXX: currently not used, see comment in chat().
1881 * 1 : csp = Current client state (buffers, headers, etc...)
1882 * 2 : buf = Data from the client's request to check.
1883 * 3 : len = The data length.
1885 * Returns : TRUE if the request contained one or more NULL bytes, or
1888 *********************************************************************/
1889 static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1891 size_t c_len; /* Request lenght when treated as C string */
1893 c_len = strlen(buf);
1898 * Null byte(s) found. Log the request,
1899 * return an error response and hang up.
1901 size_t tmp_len = c_len;
1906 * Replace NULL byte(s) with '°' characters
1907 * so the request can be logged as string.
1908 * XXX: Is there a better replacement character?
1911 tmp_len += strlen(buf+tmp_len);
1912 } while (tmp_len < len);
1914 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1915 "(length=%d, strlen=%d).", csp->ip_addr_str, len, c_len);
1916 log_error(LOG_LEVEL_HEADER,
1917 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1919 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
1921 /* XXX: Log correct size */
1922 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1932 /*********************************************************************
1934 * Function : crunch_response_triggered
1936 * Description : Checks if the request has to be crunched,
1937 * and delivers the crunch response if necessary.
1940 * 1 : csp = Current client state (buffers, headers, etc...)
1941 * 2 : crunchers = list of cruncher functions to run
1943 * Returns : TRUE if the request was answered with a crunch response
1946 *********************************************************************/
1947 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
1949 struct http_response *rsp = NULL;
1950 const struct cruncher *c;
1953 * If CGI request crunching is disabled,
1954 * check the CGI dispatcher out of order to
1955 * prevent unintentional blocks or redirects.
1957 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
1958 && (NULL != (rsp = dispatch_cgi(csp))))
1960 /* Deliver, log and free the interception response. */
1961 send_crunch_response(csp, rsp);
1965 for (c = crunchers; c->cruncher != NULL; c++)
1968 * Check the cruncher if either Privoxy is toggled
1969 * on and the request isn't forced, or if the cruncher
1970 * applies to forced requests as well.
1972 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
1973 !(csp->flags & CSP_FLAG_FORCED)) ||
1974 (c->flags & CF_IGNORE_FORCE))
1976 rsp = c->cruncher(csp);
1979 /* Deliver, log and free the interception response. */
1980 send_crunch_response(csp, rsp);
1981 #ifdef FEATURE_STATISTICS
1982 if (c->flags & CF_COUNT_AS_REJECT)
1984 csp->flags |= CSP_FLAG_REJECTED;
1986 #endif /* def FEATURE_STATISTICS */
1997 /*********************************************************************
1999 * Function : build_request_line
2001 * Description : Builds the HTTP request line.
2003 * If a HTTP forwarder is used it expects the whole URL,
2004 * web servers only get the path.
2007 * 1 : csp = Current client state (buffers, headers, etc...)
2008 * 2 : fwd = The forwarding spec used for the request
2009 * XXX: Should use http->fwd instead.
2010 * 3 : request_line = The old request line which will be replaced.
2012 * Returns : Nothing. Terminates in case of memory problems.
2014 *********************************************************************/
2015 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
2017 struct http_request *http = csp->http;
2019 assert(http->ssl == 0);
2022 * Downgrade http version from 1.1 to 1.0
2023 * if +downgrade action applies.
2025 if ( (csp->action->flags & ACTION_DOWNGRADE)
2026 && (!strcmpic(http->ver, "HTTP/1.1")))
2029 http->ver = strdup("HTTP/1.0");
2031 if (http->ver == NULL)
2033 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
2038 * Rebuild the request line.
2040 freez(*request_line);
2041 *request_line = strdup(http->gpc);
2042 string_append(request_line, " ");
2044 if (fwd->forward_host)
2046 string_append(request_line, http->url);
2050 string_append(request_line, http->path);
2052 string_append(request_line, " ");
2053 string_append(request_line, http->ver);
2055 if (*request_line == NULL)
2057 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
2059 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
2063 /*********************************************************************
2065 * Function : change_request_destination
2067 * Description : Parse a (rewritten) request line and regenerate
2068 * the http request data.
2071 * 1 : csp = Current client state (buffers, headers, etc...)
2073 * Returns : Forwards the parse_http_request() return code.
2074 * Terminates in case of memory problems.
2076 *********************************************************************/
2077 static jb_err change_request_destination(struct client_state *csp)
2079 struct http_request *http = csp->http;
2082 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
2083 free_http_request(http);
2084 err = parse_http_request(csp->headers->first->str, http, csp);
2085 if (JB_ERR_OK != err)
2087 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
2088 jb_err_to_string(err));
2092 /* XXX: ocmd is a misleading name */
2093 http->ocmd = strdup(http->cmd);
2094 if (http->ocmd == NULL)
2096 log_error(LOG_LEVEL_FATAL,
2097 "Out of memory copying rewritten HTTP request line");
2105 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2106 /*********************************************************************
2108 * Function : server_response_is_complete
2110 * Description : Determines whether we should stop reading
2111 * from the server socket.
2114 * 1 : csp = Current client state (buffers, headers, etc...)
2115 * 2 : content_length = Length of content received so far.
2117 * Returns : TRUE if the response is complete,
2120 *********************************************************************/
2121 static int server_response_is_complete(struct client_state *csp, size_t content_length)
2123 int content_length_known = (csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
2125 if (!strcmpic(csp->http->gpc, "HEAD"))
2128 * "HEAD" implies no body, we are thus expecting
2129 * no content. XXX: incomplete "list" of methods?
2131 csp->expected_content_length = 0;
2132 content_length_known = TRUE;
2135 if (csp->http->status == 304)
2138 * Expect no body. XXX: incomplete "list" of status codes?
2140 csp->expected_content_length = 0;
2141 content_length_known = TRUE;
2144 return (content_length_known && ((0 == csp->expected_content_length)
2145 || (csp->expected_content_length <= content_length)));
2147 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2149 /*********************************************************************
2151 * Function : mark_server_socket_tainted
2153 * Description : Makes sure we don't reuse a server socket
2154 * (if we didn't read everything the server sent
2155 * us reusing the socket would lead to garbage).
2158 * 1 : csp = Current client state (buffers, headers, etc...)
2162 *********************************************************************/
2163 static void mark_server_socket_tainted(struct client_state *csp)
2165 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
2167 log_error(LOG_LEVEL_CONNECT, "Unsetting keep-alive flag.");
2168 csp->flags &= ~CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE;
2172 /*********************************************************************
2174 * Function : get_request_line
2176 * Description : Read the client request line.
2179 * 1 : csp = Current client state (buffers, headers, etc...)
2181 * Returns : Pointer to request line or NULL in case of errors.
2183 *********************************************************************/
2184 static char *get_request_line(struct client_state *csp)
2186 char buf[BUFFER_SIZE];
2187 char *request_line = NULL;
2190 memset(buf, 0, sizeof(buf));
2194 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
2196 log_error(LOG_LEVEL_ERROR,
2197 "Stopped waiting for the request line.");
2198 write_socket(csp->cfd, CONNECTION_TIMEOUT_RESPONSE,
2199 strlen(CONNECTION_TIMEOUT_RESPONSE));
2203 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2205 if (len <= 0) return NULL;
2208 * If there is no memory left for buffering the
2209 * request, there is nothing we can do but hang up
2211 if (add_to_iob(csp, buf, len))
2216 request_line = get_header(csp->iob);
2218 } while ((NULL != request_line) && ('\0' == *request_line));
2220 return request_line;
2225 /*********************************************************************
2227 * Function : receive_client_request
2229 * Description : Read the client's request (more precisely the
2230 * client headers) and answer it if necessary.
2232 * Note that since we're not using select() we could get
2233 * blocked here if a client connected, then didn't say
2237 * 1 : csp = Current client state (buffers, headers, etc...)
2239 * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
2241 *********************************************************************/
2242 static jb_err receive_client_request(struct client_state *csp)
2244 char buf[BUFFER_SIZE];
2247 struct http_request *http;
2251 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
2252 struct list header_list;
2253 struct list *headers = &header_list;
2257 memset(buf, 0, sizeof(buf));
2259 req = get_request_line(csp);
2262 return JB_ERR_PARSE;
2264 assert(*req != '\0');
2266 if (client_protocol_is_unsupported(csp, req))
2268 return JB_ERR_PARSE;
2271 #ifdef FEATURE_FORCE_LOAD
2273 * If this request contains the FORCE_PREFIX and blocks
2274 * aren't enforced, get rid of it and set the force flag.
2276 if (strstr(req, FORCE_PREFIX))
2278 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
2280 log_error(LOG_LEVEL_FORCE,
2281 "Ignored force prefix in request: \"%s\".", req);
2285 strclean(req, FORCE_PREFIX);
2286 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
2287 csp->flags |= CSP_FLAG_FORCED;
2290 #endif /* def FEATURE_FORCE_LOAD */
2292 err = parse_http_request(req, http, csp);
2293 if (JB_ERR_OK != err)
2295 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", jb_err_to_string(err));
2299 if (http->cmd == NULL)
2301 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
2302 /* XXX: Use correct size */
2303 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2304 log_error(LOG_LEVEL_ERROR, "Invalid header received from %s.", csp->ip_addr_str);
2306 free_http_request(http);
2307 return JB_ERR_PARSE;
2310 /* grab the rest of the client's headers */
2314 p = get_header(csp->iob);
2318 /* There are no additional headers to read. */
2325 * We didn't receive a complete header
2326 * line yet, get the rest of it.
2328 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
2330 log_error(LOG_LEVEL_ERROR,
2331 "Stopped grabbing the client headers.");
2332 return JB_ERR_PARSE;
2335 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2338 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
2339 destroy_list(headers);
2340 return JB_ERR_PARSE;
2343 if (add_to_iob(csp, buf, len))
2346 * If there is no memory left for buffering the
2347 * request, there is nothing we can do but hang up
2349 destroy_list(headers);
2350 return JB_ERR_MEMORY;
2356 * We were able to read a complete
2357 * header and can finaly enlist it.
2364 if (http->host == NULL)
2367 * If we still don't know the request destination,
2368 * the request is invalid or the client uses
2369 * Privoxy without its knowledge.
2371 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
2374 * Our attempts to get the request destination
2375 * elsewhere failed or Privoxy is configured
2376 * to only accept proxy requests.
2378 * An error response has already been send
2379 * and we're done here.
2381 return JB_ERR_PARSE;
2386 * Determine the actions for this URL
2388 #ifdef FEATURE_TOGGLE
2389 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
2391 /* Most compatible set of actions (i.e. none) */
2392 init_current_action(csp->action);
2395 #endif /* ndef FEATURE_TOGGLE */
2397 get_url_actions(csp, http);
2401 * Save a copy of the original request for logging
2403 http->ocmd = strdup(http->cmd);
2404 if (http->ocmd == NULL)
2406 log_error(LOG_LEVEL_FATAL,
2407 "Out of memory copying HTTP request line");
2409 enlist(csp->headers, http->cmd);
2411 /* Append the previously read headers */
2412 list_append_list_unique(csp->headers, headers);
2413 destroy_list(headers);
2420 /*********************************************************************
2422 * Function : parse_client_request
2424 * Description : Parses the client's request and decides what to do
2427 * Note that since we're not using select() we could get
2428 * blocked here if a client connected, then didn't say
2432 * 1 : csp = Current client state (buffers, headers, etc...)
2434 * Returns : JB_ERR_OK or JB_ERR_PARSE
2436 *********************************************************************/
2437 static jb_err parse_client_request(struct client_state *csp)
2439 struct http_request *http = csp->http;
2442 err = sed(csp, FILTER_CLIENT_HEADERS);
2443 if (JB_ERR_OK != err)
2445 /* XXX: Should be handled in sed(). */
2446 assert(err == JB_ERR_PARSE);
2447 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers.");
2449 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2451 /* Check request line for rewrites. */
2452 if ((NULL == csp->headers->first->str)
2453 || (strcmp(http->cmd, csp->headers->first->str) &&
2454 (JB_ERR_OK != change_request_destination(csp))))
2457 * A header filter broke the request line - bail out.
2459 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
2460 /* XXX: Use correct size */
2461 log_error(LOG_LEVEL_CLF,
2462 "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
2463 log_error(LOG_LEVEL_ERROR,
2464 "Invalid request line after applying header filters.");
2465 free_http_request(http);
2467 return JB_ERR_PARSE;
2475 /*********************************************************************
2479 * Description : Once a connection to the client has been accepted,
2480 * this function is called (via serve()) to handle the
2481 * main business of the communication. When this
2482 * function returns, the caller must close the client
2485 * FIXME: chat is nearly thousand lines long.
2489 * 1 : csp = Current client state (buffers, headers, etc...)
2491 * Returns : Nothing.
2493 *********************************************************************/
2494 static void chat(struct client_state *csp)
2496 char buf[BUFFER_SIZE];
2503 int ms_iis5_hack = 0;
2504 size_t byte_count = 0;
2505 int forwarded_connect_retries = 0;
2506 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
2507 const struct forward_spec *fwd;
2508 struct http_request *http;
2509 int len = 0; /* for buffer sizes (and negative error codes) */
2511 /* Function that does the content filtering for the current request */
2512 filter_function_ptr content_filter = NULL;
2514 /* Skeleton for HTTP response, if we should intercept the request */
2515 struct http_response *rsp;
2516 struct timeval timeout;
2518 memset(buf, 0, sizeof(buf));
2519 memset(&timeout, 0, sizeof(timeout));
2520 timeout.tv_sec = csp->config->socket_timeout;
2524 if (receive_client_request(csp) != JB_ERR_OK)
2528 if (parse_client_request(csp) != JB_ERR_OK)
2533 /* decide how to route the HTTP request */
2534 fwd = forward_url(csp, http);
2537 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
2538 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2542 * build the http request to send to the server
2543 * we have to do one of the following:
2545 * create = use the original HTTP request to create a new
2546 * HTTP request that has either the path component
2547 * without the http://domainspec (w/path) or the
2548 * full orininal URL (w/url)
2549 * Note that the path and/or the HTTP version may
2550 * have been altered by now.
2552 * connect = Open a socket to the host:port of the server
2553 * and short-circuit server and client socket.
2555 * pass = Pass the request unchanged if forwarding a CONNECT
2556 * request to a parent proxy. Note that we'll be sending
2557 * the CFAIL message ourselves if connecting to the parent
2558 * fails, but we won't send a CSUCCEED message if it works,
2559 * since that would result in a double message (ours and the
2560 * parent's). After sending the request to the parent, we simply
2563 * here's the matrix:
2566 * +--------+--------+
2568 * 0 | create | connect|
2570 * Forwarding +--------+--------+
2572 * 1 | create | pass |
2574 * +--------+--------+
2578 if (http->ssl && connect_port_is_forbidden(csp))
2580 const char *acceptable_connect_ports =
2581 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
2582 assert(NULL != acceptable_connect_ports);
2583 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
2584 "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
2585 csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
2586 csp->action->flags |= ACTION_BLOCK;
2592 freez(csp->headers->first->str);
2593 build_request_line(csp, fwd, &csp->headers->first->str);
2597 * We have a request. Check if one of the crunchers wants it.
2599 if (crunch_response_triggered(csp, crunchers_all))
2602 * Yes. The client got the crunch response
2603 * and we are done here after cleaning up.
2605 /* XXX: why list_remove_all()? */
2606 list_remove_all(csp->headers);
2611 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2613 if (fwd->forward_host)
2615 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2616 fwd->forward_host, fwd->forward_port, http->hostport);
2620 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2623 /* here we connect to the server, gateway, or the forwarder */
2625 while ((csp->sfd = forwarded_connect(fwd, http, csp))
2626 && (errno == EINVAL)
2627 && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2629 log_error(LOG_LEVEL_ERROR,
2630 "failed request #%u to connect to %s. Trying again.",
2631 forwarded_connect_retries, http->hostport);
2634 if (csp->sfd == JB_INVALID_SOCKET)
2636 if (fwd->type != SOCKS_NONE)
2639 rsp = error_response(csp, "forwarding-failed", errno);
2641 else if (errno == EINVAL)
2643 rsp = error_response(csp, "no-such-domain", errno);
2647 rsp = error_response(csp, "connect-failed", errno);
2648 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2652 /* Write the answer to the client */
2655 send_crunch_response(csp, rsp);
2661 hdr = list_to_text(csp->headers);
2664 /* FIXME Should handle error properly */
2665 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2667 list_remove_all(csp->headers);
2669 if (fwd->forward_host || (http->ssl == 0))
2672 * Write the client's (modified) header to the server
2673 * (along with anything else that may be in the buffer)
2675 if (write_socket(csp->sfd, hdr, strlen(hdr))
2676 || (flush_socket(csp->sfd, csp->iob) < 0))
2678 log_error(LOG_LEVEL_CONNECT,
2679 "write header to: %s failed: %E", http->hostport);
2681 rsp = error_response(csp, "connect-failed", errno);
2684 send_crunch_response(csp, rsp);
2694 * We're running an SSL tunnel and we're not forwarding,
2695 * so just send the "connect succeeded" message to the
2696 * client, flush the rest, and get out of the way.
2698 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
2706 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2708 /* we're finished with the client's header */
2711 maxfd = (csp->cfd > csp->sfd) ? csp->cfd : csp->sfd;
2713 /* pass data between the client and server
2714 * until one or the other shuts down the connection.
2723 * FD_ZERO here seems to point to an errant macro which crashes.
2724 * So do this by hand for now...
2726 memset(&rfds,0x00,sizeof(fd_set));
2730 FD_SET(csp->cfd, &rfds);
2731 FD_SET(csp->sfd, &rfds);
2733 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2734 if ((csp->flags & CSP_FLAG_CHUNKED)
2735 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
2736 && ((csp->iob->eod - csp->iob->cur) >= 5)
2737 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
2739 log_error(LOG_LEVEL_CONNECT,
2740 "Looks like we read the last chunk together with "
2741 "the server headers. We better stop reading.");
2742 byte_count = (size_t)(csp->iob->eod - csp->iob->cur);
2743 csp->expected_content_length = byte_count;
2744 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2746 if (server_body && server_response_is_complete(csp, byte_count))
2748 log_error(LOG_LEVEL_CONNECT,
2749 "Done reading from server. Expected content length: %d. "
2750 "Actual content length: %d. Most recently received: %d.",
2751 csp->expected_content_length, byte_count, len);
2754 * XXX: should not jump around,
2755 * chat() is complicated enough already.
2759 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2761 n = select((int)maxfd+1, &rfds, NULL, NULL, &timeout);
2765 log_error(LOG_LEVEL_ERROR, "Didn't receive data in time.");
2766 if ((byte_count == 0) && (http->ssl == 0))
2768 write_socket(csp->cfd, CONNECTION_TIMEOUT_RESPONSE,
2769 strlen(CONNECTION_TIMEOUT_RESPONSE));
2771 mark_server_socket_tainted(csp);
2776 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2777 mark_server_socket_tainted(csp);
2782 * This is the body of the browser's request,
2783 * just read and write it.
2785 if (FD_ISSET(csp->cfd, &rfds))
2787 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2791 /* XXX: not sure if this is necessary. */
2792 mark_server_socket_tainted(csp);
2793 break; /* "game over, man" */
2796 if (write_socket(csp->sfd, buf, (size_t)len))
2798 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2799 mark_server_socket_tainted(csp);
2806 * The server wants to talk. It could be the header or the body.
2807 * If `hdr' is null, then it's the header otherwise it's the body.
2808 * FIXME: Does `hdr' really mean `host'? No.
2810 if (FD_ISSET(csp->sfd, &rfds))
2813 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2817 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2819 if (http->ssl && (fwd->forward_host == NULL))
2822 * Just hang up. We already confirmed the client's CONNECT
2823 * request with status code 200 and unencrypted content is
2824 * no longer welcome.
2826 log_error(LOG_LEVEL_ERROR,
2827 "CONNECT already confirmed. Unable to tell the client about the problem.");
2830 else if (byte_count)
2833 * Just hang up. We already transmitted the original headers
2834 * and parts of the original content and therefore missed the
2835 * chance to send an error message (without risking data corruption).
2837 * XXX: we could retry with a fancy range request here.
2839 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2840 "Unable to tell the client about the problem.");
2841 mark_server_socket_tainted(csp);
2845 rsp = error_response(csp, "connect-failed", errno);
2848 send_crunch_response(csp, rsp);
2854 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2855 if (csp->flags & CSP_FLAG_CHUNKED)
2857 if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2859 /* XXX: this is a temporary hack */
2860 log_error(LOG_LEVEL_CONNECT,
2861 "Looks like we reached the end of the last chunk. "
2862 "We better stop reading.");
2863 csp->expected_content_length = byte_count + (size_t)len;
2864 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2868 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2871 * Add a trailing zero to let be able to use string operations.
2872 * XXX: do we still need this with filter_popups gone?
2877 * Normally, this would indicate that we've read
2878 * as much as the server has sent us and we can
2879 * close the client connection. However, Microsoft
2880 * in its wisdom has released IIS/5 with a bug that
2881 * prevents it from sending the trailing \r\n in
2882 * a 302 redirect header (and possibly other headers).
2883 * To work around this if we've haven't parsed
2884 * a full header we'll append a trailing \r\n
2885 * and see if this now generates a valid one.
2887 * This hack shouldn't have any impacts. If we've
2888 * already transmitted the header or if this is a
2889 * SSL connection, then we won't bother with this
2890 * hack. So we only work on partially received
2891 * headers. If we append a \r\n and this still
2892 * doesn't generate a valid header, then we won't
2893 * transmit anything to the client.
2898 if (server_body || http->ssl)
2901 * If we have been buffering up the document,
2902 * now is the time to apply content modification
2903 * and send the result to the client.
2907 p = execute_content_filter(csp, content_filter);
2909 * If the content filter fails, use the original
2910 * buffer and length.
2911 * (see p != NULL ? p : csp->iob->cur below)
2915 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2918 if (JB_ERR_OK != update_server_headers(csp))
2920 log_error(LOG_LEVEL_FATAL,
2921 "Failed to update server headers. after filtering.");
2924 hdr = list_to_text(csp->headers);
2927 /* FIXME Should handle error properly */
2928 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2931 if (write_socket(csp->cfd, hdr, strlen(hdr))
2932 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
2934 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2937 mark_server_socket_tainted(csp);
2945 break; /* "game over, man" */
2949 * This is NOT the body, so
2950 * Let's pretend the server just sent us a blank line.
2952 snprintf(buf, sizeof(buf), "\r\n");
2953 len = (int)strlen(buf);
2956 * Now, let the normal header parsing algorithm below do its
2957 * job. If it fails, we'll exit instead of continuing.
2964 * If this is an SSL connection or we're in the body
2965 * of the server document, just write it to the client,
2966 * unless we need to buffer the body for later content-filtering
2968 if (server_body || http->ssl)
2973 * If there is no memory left for buffering the content, or the buffer limit
2974 * has been reached, switch to non-filtering mode, i.e. make & write the
2975 * header, flush the iob and buf, and get out of the way.
2977 if (add_to_iob(csp, buf, len))
2982 log_error(LOG_LEVEL_INFO,
2983 "Flushing header and buffers. Stepping back from filtering.");
2985 hdr = list_to_text(csp->headers);
2989 * Memory is too tight to even generate the header.
2990 * Send our static "Out-of-memory" page.
2992 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2993 rsp = cgi_error_memory();
2994 send_crunch_response(csp, rsp);
2995 mark_server_socket_tainted(csp);
2998 hdrlen = strlen(hdr);
3000 if (write_socket(csp->cfd, hdr, hdrlen)
3001 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
3002 || (write_socket(csp->cfd, buf, (size_t)len)))
3004 log_error(LOG_LEVEL_CONNECT,
3005 "Flush header and buffers to client failed: %E");
3007 mark_server_socket_tainted(csp);
3012 * Reset the byte_count to the amount of bytes
3013 * we just flushed. len will be added a few lines below,
3014 * hdrlen doesn't matter for LOG_LEVEL_CLF.
3016 byte_count = (size_t)flushed;
3018 content_filter = NULL;
3024 if (write_socket(csp->cfd, buf, (size_t)len))
3026 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
3027 mark_server_socket_tainted(csp);
3031 byte_count += (size_t)len;
3036 const char *header_start;
3038 * We're still looking for the end of the server's header.
3039 * Buffer up the data we just read. If that fails, there's
3040 * little we can do but send our static out-of-memory page.
3042 if (add_to_iob(csp, buf, len))
3044 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
3045 rsp = cgi_error_memory();
3046 send_crunch_response(csp, rsp);
3047 mark_server_socket_tainted(csp);
3051 header_start = csp->iob->cur;
3053 /* Convert iob into something sed() can digest */
3054 if (JB_ERR_PARSE == get_server_headers(csp))
3059 * Well, we tried our MS IIS/5 hack and it didn't work.
3060 * The header is incomplete and there isn't anything
3061 * we can do about it.
3063 log_error(LOG_LEVEL_INFO,
3064 "MS IIS5 hack didn't produce valid headers.");
3070 * Since we have to wait for more from the server before
3071 * we can parse the headers we just continue here.
3073 int header_offset = csp->iob->cur - header_start;
3074 assert(csp->iob->cur >= header_start);
3075 byte_count += (size_t)(len - header_offset);
3076 log_error(LOG_LEVEL_CONNECT, "Continuing buffering headers. "
3077 "byte_count: %d. header_offset: %d. len: %d.",
3078 byte_count, header_offset, len);
3083 /* Did we actually get anything? */
3084 if (NULL == csp->headers->first)
3086 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
3087 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3088 write_socket(csp->cfd, NO_SERVER_DATA_RESPONSE, strlen(NO_SERVER_DATA_RESPONSE));
3089 free_http_request(http);
3090 mark_server_socket_tainted(csp);
3094 assert(csp->headers->first->str);
3096 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
3097 strncmpic(csp->headers->first->str, "ICY", 3))
3100 * It doesn't look like a HTTP (or Shoutcast) response:
3101 * tell the client and log the problem.
3103 if (strlen(csp->headers->first->str) > 30)
3105 csp->headers->first->str[30] = '\0';
3107 log_error(LOG_LEVEL_ERROR,
3108 "Invalid server or forwarder response. Starts with: %s",
3109 csp->headers->first->str);
3110 log_error(LOG_LEVEL_CLF,
3111 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3112 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
3113 strlen(INVALID_SERVER_HEADERS_RESPONSE));
3114 free_http_request(http);
3115 mark_server_socket_tainted(csp);
3120 * We have now received the entire server header,
3121 * filter it and send the result to the client
3123 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
3125 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
3127 hdr = list_to_text(csp->headers);
3130 /* FIXME Should handle error properly */
3131 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3134 if (crunch_response_triggered(csp, crunchers_light))
3137 * One of the tags created by a server-header
3138 * tagger triggered a crunch. We already
3139 * delivered the crunch response to the client
3140 * and are done here after cleaning up.
3143 mark_server_socket_tainted(csp);
3146 /* Buffer and pcrs filter this if appropriate. */
3148 if (!http->ssl) /* We talk plaintext */
3150 content_filter = get_filter_function(csp);
3153 * Only write if we're not buffering for content modification
3155 if (!content_filter)
3158 * Write the server's (modified) header to
3159 * the client (along with anything else that
3160 * may be in the buffer)
3163 if (write_socket(csp->cfd, hdr, strlen(hdr))
3164 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
3166 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
3169 * The write failed, so don't bother mentioning it
3170 * to the client... it probably can't hear us anyway.
3173 mark_server_socket_tainted(csp);
3177 byte_count += (size_t)len;
3182 * XXX: the header lenght should probably
3183 * be calculated by get_server_headers().
3185 int header_length = csp->iob->cur - header_start;
3186 assert(csp->iob->cur > header_start);
3187 byte_count += (size_t)(len - header_length);
3190 /* we're finished with the server's header */
3196 * If this was a MS IIS/5 hack then it means the server
3197 * has already closed the connection. Nothing more to read.
3202 log_error(LOG_LEVEL_INFO,
3203 "Closed server connection detected with MS IIS5 hack enabled.");
3209 mark_server_socket_tainted(csp);
3210 return; /* huh? we should never get here */
3213 if (csp->content_length == 0)
3216 * If Privoxy didn't recalculate the Content-Lenght,
3217 * byte_count is still correct.
3219 csp->content_length = byte_count;
3222 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3223 && (csp->expected_content_length != byte_count))
3225 log_error(LOG_LEVEL_CONNECT,
3226 "Received %d bytes while expecting %d.",
3227 byte_count, csp->expected_content_length);
3228 mark_server_socket_tainted(csp);
3231 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
3232 csp->ip_addr_str, http->ocmd, csp->content_length);
3236 /*********************************************************************
3238 * Function : wait_for_alive_connections
3240 * Description : Waits for alive connections to timeout.
3246 *********************************************************************/
3247 static void wait_for_alive_connections()
3249 int connections_alive = close_unusable_connections();
3251 while (0 < connections_alive)
3253 log_error(LOG_LEVEL_CONNECT,
3254 "Waiting for %d connections to timeout.",
3257 connections_alive = close_unusable_connections();
3260 log_error(LOG_LEVEL_CONNECT, "No connections to wait for left.");
3264 /*********************************************************************
3268 * Description : This is little more than chat. We only "serve" to
3269 * to close any socket that chat may have opened.
3272 * 1 : csp = Current client state (buffers, headers, etc...)
3276 *********************************************************************/
3278 void serve(struct client_state *csp)
3279 #else /* ifndef AMIGA */
3280 static void serve(struct client_state *csp)
3281 #endif /* def AMIGA */
3284 close_socket(csp->cfd);
3286 if (csp->sfd != JB_INVALID_SOCKET)
3288 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3289 static int monitor_thread_running = 0;
3291 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
3292 && (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
3294 remember_connection(csp->sfd, csp->http, forward_url(csp, csp->http));
3295 privoxy_mutex_lock(&connection_reuse_mutex);
3296 if (!monitor_thread_running)
3298 monitor_thread_running = 1;
3299 privoxy_mutex_unlock(&connection_reuse_mutex);
3300 wait_for_alive_connections();
3301 privoxy_mutex_lock(&connection_reuse_mutex);
3302 monitor_thread_running = 0;
3304 privoxy_mutex_unlock(&connection_reuse_mutex);
3308 forget_connection(csp->sfd);
3309 close_socket(csp->sfd);
3312 close_socket(csp->sfd);
3313 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3316 csp->flags &= ~CSP_FLAG_ACTIVE;
3322 /*********************************************************************
3324 * Function : server_thread
3326 * Description : We only exist to call `serve' in a threaded environment.
3329 * 1 : data = Current client state (buffers, headers, etc...)
3331 * Returns : Always 0.
3333 *********************************************************************/
3334 static int32 server_thread(void *data)
3336 serve((struct client_state *) data);
3343 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3344 /*********************************************************************
3348 * Description : Print usage info & exit.
3350 * Parameters : Pointer to argv[0] for identifying ourselves
3354 *********************************************************************/
3355 static void usage(const char *myname)
3357 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
3361 #endif /* defined(unix) */
3364 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
3365 #endif /* defined(unix) */
3366 "[--version] [configfile]\n"
3367 "Aborting\n", myname);
3372 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
3375 #ifdef MUTEX_LOCKS_AVAILABLE
3376 /*********************************************************************
3378 * Function : privoxy_mutex_lock
3380 * Description : Locks a mutex.
3383 * 1 : mutex = The mutex to lock.
3385 * Returns : Void. May exit in case of errors.
3387 *********************************************************************/
3388 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
3390 #ifdef FEATURE_PTHREAD
3391 int err = pthread_mutex_lock(mutex);
3394 if (mutex != &log_mutex)
3396 log_error(LOG_LEVEL_FATAL,
3397 "Mutex locking failed: %s.\n", strerror(err));
3402 EnterCriticalSection(mutex);
3403 #endif /* def FEATURE_PTHREAD */
3407 /*********************************************************************
3409 * Function : privoxy_mutex_unlock
3411 * Description : Unlocks a mutex.
3414 * 1 : mutex = The mutex to unlock.
3416 * Returns : Void. May exit in case of errors.
3418 *********************************************************************/
3419 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
3421 #ifdef FEATURE_PTHREAD
3422 int err = pthread_mutex_unlock(mutex);
3425 if (mutex != &log_mutex)
3427 log_error(LOG_LEVEL_FATAL,
3428 "Mutex unlocking failed: %s.\n", strerror(err));
3433 LeaveCriticalSection(mutex);
3434 #endif /* def FEATURE_PTHREAD */
3438 /*********************************************************************
3440 * Function : privoxy_mutex_init
3442 * Description : Prepares a mutex.
3445 * 1 : mutex = The mutex to initialize.
3447 * Returns : Void. May exit in case of errors.
3449 *********************************************************************/
3450 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
3452 #ifdef FEATURE_PTHREAD
3453 int err = pthread_mutex_init(mutex, 0);
3456 printf("Fatal error. Mutex initialization failed: %s.\n",
3461 InitializeCriticalSection(mutex);
3462 #endif /* def FEATURE_PTHREAD */
3464 #endif /* def MUTEX_LOCKS_AVAILABLE */
3466 /*********************************************************************
3468 * Function : initialize_mutexes
3470 * Description : Prepares mutexes if mutex support is available.
3474 * Returns : Void, exits in case of errors.
3476 *********************************************************************/
3477 static void initialize_mutexes(void)
3479 #ifdef MUTEX_LOCKS_AVAILABLE
3481 * Prepare global mutex semaphores
3483 privoxy_mutex_init(&log_mutex);
3484 privoxy_mutex_init(&log_init_mutex);
3485 privoxy_mutex_init(&connection_reuse_mutex);
3488 * XXX: The assumptions below are a bit naive
3489 * and can cause locks that aren't necessary.
3491 * For example older FreeBSD versions (< 6.x?)
3492 * have no gethostbyname_r, but gethostbyname is
3495 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
3496 privoxy_mutex_init(&resolver_mutex);
3497 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
3499 * XXX: should we use a single mutex for
3500 * localtime() and gmtime() as well?
3502 #ifndef HAVE_GMTIME_R
3503 privoxy_mutex_init(&gmtime_mutex);
3504 #endif /* ndef HAVE_GMTIME_R */
3506 #ifndef HAVE_LOCALTIME_R
3507 privoxy_mutex_init(&localtime_mutex);
3508 #endif /* ndef HAVE_GMTIME_R */
3511 privoxy_mutex_init(&rand_mutex);
3512 #endif /* ndef HAVE_RANDOM */
3513 #endif /* def MUTEX_LOCKS_AVAILABLE */
3517 /*********************************************************************
3521 * Description : Load the config file and start the listen loop.
3522 * This function is a lot more *sane* with the `load_config'
3523 * and `listen_loop' functions; although it stills does
3524 * a *little* too much for my taste.
3527 * 1 : argc = Number of parameters (including $0).
3528 * 2 : argv = Array of (char *)'s to the parameters.
3530 * Returns : 1 if : can't open config file, unrecognized directive,
3531 * stats requested in multi-thread mode, can't open the
3532 * log file, can't open the jar file, listen port is invalid,
3533 * any load fails, and can't bind port.
3535 * Else main never returns, the process must be signaled
3536 * to terminate execution. Or, on Windows, use the
3537 * "File", "Exit" menu option.
3539 *********************************************************************/
3541 int real_main(int argc, const char *argv[])
3543 int main(int argc, const char *argv[])
3547 unsigned int random_seed;
3549 struct passwd *pw = NULL;
3550 struct group *grp = NULL;
3553 char *pre_chroot_nslookup_to_load_resolver = NULL;
3560 #if !defined(_WIN32)
3568 * Parse the command line arguments
3570 * XXX: simply printing usage information in case of
3571 * invalid arguments isn't particularly user friendly.
3573 while (++argc_pos < argc)
3576 /* Check to see if the service must be installed or uninstalled */
3577 if (strncmp(argv[argc_pos], "--install", 9) == 0)
3579 const char *pName = argv[argc_pos] + 9;
3582 exit( (install_service(pName)) ? 0 : 1 );
3584 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
3586 const char *pName = argv[argc_pos] + 11;
3589 exit((uninstall_service(pName)) ? 0 : 1);
3591 else if (strcmp(argv[argc_pos], "--service" ) == 0)
3593 bRunAsService = TRUE;
3594 w32_set_service_cwd();
3595 atexit(w32_service_exit_notify);
3598 #endif /* defined(_WIN32) */
3601 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3603 if (strcmp(argv[argc_pos], "--help") == 0)
3608 else if(strcmp(argv[argc_pos], "--version") == 0)
3610 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
3616 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
3621 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
3623 if (++argc_pos == argc) usage(argv[0]);
3624 pidfile = strdup(argv[argc_pos]);
3627 else if (strcmp(argv[argc_pos], "--user" ) == 0)
3629 if (++argc_pos == argc) usage(argv[argc_pos]);
3631 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
3634 if (NULL == (grp = getgrnam(p)))
3636 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
3640 if (NULL == (pw = getpwnam(argv[argc_pos])))
3642 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
3645 if (p != NULL) *--p = '\0';
3648 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
3650 if (++argc_pos == argc) usage(argv[0]);
3651 pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
3654 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
3658 #endif /* defined(unix) */
3660 else if (argc_pos + 1 != argc)
3663 * This is neither the last command line
3664 * option, nor was it recognized before,
3665 * therefore it must be invalid.
3671 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3673 configfile = argv[argc_pos];
3676 } /* -END- while (more arguments) */
3679 if ( *configfile != '/' )
3681 char cwd[BUFFER_SIZE];
3683 size_t abs_file_size;
3685 /* make config-filename absolute here */
3686 if (NULL == getcwd(cwd, sizeof(cwd)))
3688 perror("failed to get current working directory");
3693 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3694 basedir = strdup(cwd);
3696 if (NULL == basedir ||
3697 NULL == (abs_file = malloc(abs_file_size)))
3699 perror("malloc failed");
3702 strlcpy(abs_file, basedir, abs_file_size);
3703 strlcat(abs_file, "/", abs_file_size );
3704 strlcat(abs_file, configfile, abs_file_size);
3705 configfile = abs_file;
3707 #endif /* defined unix */
3711 clients->next = NULL;
3713 /* XXX: factor out initialising after the next stable release. */
3716 #elif defined(_WIN32)
3720 /* Prepare mutexes if supported and necessary. */
3721 initialize_mutexes();
3723 /* Enable logging until further notice. */
3724 init_log_module(Argv[0]);
3726 random_seed = (unsigned int)time(NULL);
3728 srandom(random_seed);
3731 #endif /* ifdef HAVE_RANDOM */
3734 * Unix signal handling
3736 * Catch the abort, interrupt and terminate signals for a graceful exit
3737 * Catch the hangup signal so the errlog can be reopened.
3738 * Ignore the broken pipe signals (FIXME: Why?)
3740 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3743 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3744 const int ignored_signals[] = { SIGPIPE, 0 };
3746 for (idx = 0; catched_signals[idx] != 0; idx++)
3748 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3749 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3751 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3752 #endif /* ifdef sun */
3754 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3758 for (idx = 0; ignored_signals[idx] != 0; idx++)
3760 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3762 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3767 #else /* ifdef _WIN32 */
3768 # ifdef _WIN_CONSOLE
3770 * We *are* in a windows console app.
3771 * Print a verbose messages about FAQ's and such
3773 printf("%s", win32_blurb);
3774 # endif /* def _WIN_CONSOLE */
3775 #endif /* def _WIN32 */
3778 /* Initialize the CGI subsystem */
3779 cgi_init_error_messages();
3782 * If runnig on unix and without the --nodaemon
3783 * option, become a daemon. I.e. fork, detach
3784 * from tty and get process group leadership
3797 if ( pid < 0 ) /* error */
3802 else if ( pid != 0 ) /* parent */
3807 * must check for errors
3808 * child died due to missing files aso
3811 wpid = waitpid( pid, &status, WNOHANG );
3820 /* Should be more portable, but not as well tested */
3825 #else /* ndef __FreeBSD__ */
3827 #endif /* ndef __FreeBSD__ */
3828 fd = open("/dev/tty", O_RDONLY);
3831 /* no error check here */
3832 ioctl( fd, TIOCNOTTY,0 );
3837 * stderr (fd 2) will be closed later on, when the
3838 * log file has been parsed.
3845 } /* -END- if (!no_daemon) */
3848 * As soon as we have written the PID file, we can switch
3849 * to the user and group ID indicated by the --user option
3855 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3857 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3863 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3865 /* Read the time zone file from /etc before doing chroot. */
3867 if (NULL != pre_chroot_nslookup_to_load_resolver
3868 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3870 /* Initialize resolver library. */
3871 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3873 if (chroot(pw->pw_dir) < 0)
3875 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3879 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3882 if (setuid(pw->pw_uid))
3884 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3888 char putenv_dummy[64];
3890 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3891 if (putenv(putenv_dummy) != 0)
3893 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3896 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3897 if (putenv(putenv_dummy) != 0)
3899 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3905 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3908 #endif /* defined unix */
3911 /* This will be FALSE unless the command line specified --service
3915 /* Yup, so now we must attempt to establish a connection
3916 * with the service dispatcher. This will only work if this
3917 * process was launched by the service control manager to
3918 * actually run as a service. If this isn't the case, i've
3919 * known it take around 30 seconds or so for the call to return.
3922 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3923 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3925 /* Service has run, and at this point is now being stopped, so just return */
3930 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3932 /* An error occurred. Usually it's because --service was wrongly specified
3933 * and we were unable to connect to the Service Control Dispatcher because
3934 * it wasn't expecting us and is therefore not listening.
3936 * For now, just continue below to call the listen_loop function.
3939 #endif /* def _WIN32 */
3949 /*********************************************************************
3951 * Function : bind_port_helper
3953 * Description : Bind the listen port. Handles logging, and aborts
3957 * 1 : config = Privoxy configuration. Specifies port
3960 * Returns : Port that was opened.
3962 *********************************************************************/
3963 static jb_socket bind_port_helper(struct configuration_spec * config)
3968 if (config->haddr == NULL)
3970 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3975 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3976 config->hport, config->haddr);
3979 result = bind_port(config->haddr, config->hport, &bfd);
3986 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3987 "There may be another Privoxy or some other "
3988 "proxy running on port %d",
3989 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
3990 config->hport, config->hport);
3993 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3994 "The hostname is not resolvable",
3995 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3998 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
3999 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
4002 /* shouldn't get here */
4003 return JB_INVALID_SOCKET;
4006 config->need_bind = 0;
4013 /* Without this simple workaround we get this compiler warning from _beginthread
4014 * warning C4028: formal parameter 1 different from declaration
4016 void w32_service_listen_loop(void *p)
4020 #endif /* def _WIN32 */
4023 /*********************************************************************
4025 * Function : listen_loop
4027 * Description : bind the listen port and enter a "FOREVER" listening loop.
4033 *********************************************************************/
4034 static void listen_loop(void)
4036 struct client_state *csp = NULL;
4038 struct configuration_spec * config;
4040 config = load_config();
4042 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4044 * XXX: Should be relocated once it no
4045 * longer needs to emit log messages.
4047 initialize_reusable_connections();
4048 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4050 bfd = bind_port_helper(config);
4052 #ifdef FEATURE_GRACEFUL_TERMINATION
4053 while (!g_terminate)
4058 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
4059 while (waitpid(-1, NULL, WNOHANG) > 0)
4061 /* zombie children */
4063 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
4066 * Free data that was used by died threads
4072 * Re-open the errlog after HUP signal
4074 if (received_hup_signal)
4076 if (NULL != config->logfile)
4078 init_error_log(Argv[0], config->logfile);
4080 received_hup_signal = 0;
4084 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
4086 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
4090 csp->flags |= CSP_FLAG_ACTIVE;
4091 csp->sfd = JB_INVALID_SOCKET;
4093 csp->config = config = load_config();
4095 if ( config->need_bind )
4098 * Since we were listening to the "old port", we will not see
4099 * a "listen" param change until the next IJB request. So, at
4100 * least 1 more request must be made for us to find the new
4101 * setting. I am simply closing the old socket and binding the
4104 * Which-ever is correct, we will serve 1 more page via the
4105 * old settings. This should probably be a "show-proxy-args"
4106 * request. This should not be a so common of an operation
4107 * that this will hurt people's feelings.
4112 bfd = bind_port_helper(config);
4115 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
4117 if (!accept_connection(csp, bfd))
4119 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
4132 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
4135 #ifdef FEATURE_TOGGLE
4136 if (global_toggle_state)
4137 #endif /* def FEATURE_TOGGLE */
4139 csp->flags |= CSP_FLAG_TOGGLED_ON;
4142 if (run_loader(csp))
4144 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
4145 /* Never get here - LOG_LEVEL_FATAL causes program exit */
4149 if (block_acl(NULL,csp))
4151 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
4152 close_socket(csp->cfd);
4156 #endif /* def FEATURE_ACL */
4158 /* add it to the list of clients */
4159 csp->next = clients->next;
4160 clients->next = csp;
4162 if (config->multi_threaded)
4166 /* this is a switch () statment in the C preprocessor - ugh */
4167 #undef SELECTED_ONE_OPTION
4169 /* Use Pthreads in preference to native code */
4170 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
4171 #define SELECTED_ONE_OPTION
4173 pthread_t the_thread;
4174 pthread_attr_t attrs;
4176 pthread_attr_init(&attrs);
4177 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
4178 errno = pthread_create(&the_thread, &attrs,
4179 (void * (*)(void *))serve, csp);
4180 child_id = errno ? -1 : 0;
4181 pthread_attr_destroy(&attrs);
4185 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
4186 #define SELECTED_ONE_OPTION
4187 child_id = _beginthread(
4188 (void (*)(void *))serve,
4193 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
4194 #define SELECTED_ONE_OPTION
4195 child_id = _beginthread(
4196 (void(* _Optlink)(void*))serve,
4202 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
4203 #define SELECTED_ONE_OPTION
4205 thread_id tid = spawn_thread
4206 (server_thread, "server", B_NORMAL_PRIORITY, csp);
4208 if ((tid >= 0) && (resume_thread(tid) == B_OK))
4210 child_id = (int) tid;
4219 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
4220 #define SELECTED_ONE_OPTION
4221 csp->cfd = ReleaseSocket(csp->cfd, -1);
4224 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4225 NP_Output, Output(),
4226 NP_CloseOutput, FALSE,
4227 NP_Name, (ULONG)"privoxy child",
4231 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4232 NP_Output, Output(),
4233 NP_CloseOutput, FALSE,
4234 NP_Name, (ULONG)"privoxy child",
4235 NP_StackSize, 200*1024,
4241 ((struct Task *)child_id)->tc_UserData = csp;
4242 Signal((struct Task *)child_id, SIGF_SINGLE);
4247 #if !defined(SELECTED_ONE_OPTION)
4250 /* This block is only needed when using fork().
4251 * When using threads, the server thread was
4252 * created and run by the call to _beginthread().
4254 if (child_id == 0) /* child */
4257 #ifdef FEATURE_TOGGLE
4258 int inherited_toggle_state = global_toggle_state;
4259 #endif /* def FEATURE_TOGGLE */
4264 * If we've been toggled or we've blocked the request, tell Mom
4267 #ifdef FEATURE_TOGGLE
4268 if (inherited_toggle_state != global_toggle_state)
4270 rc |= RC_FLAG_TOGGLED;
4272 #endif /* def FEATURE_TOGGLE */
4274 #ifdef FEATURE_STATISTICS
4275 if (csp->flags & CSP_FLAG_REJECTED)
4277 rc |= RC_FLAG_BLOCKED;
4279 #endif /* ndef FEATURE_STATISTICS */
4283 else if (child_id > 0) /* parent */
4285 /* in a fork()'d environment, the parent's
4286 * copy of the client socket and the CSP
4290 #if !defined(_WIN32) && !defined(__CYGWIN__)
4292 wait( &child_status );
4295 * Evaluate child's return code: If the child has
4296 * - been toggled, toggle ourselves
4297 * - blocked its request, bump up the stats counter
4300 #ifdef FEATURE_TOGGLE
4301 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
4303 global_toggle_state = !global_toggle_state;
4305 #endif /* def FEATURE_TOGGLE */
4307 #ifdef FEATURE_STATISTICS
4309 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
4313 #endif /* def FEATURE_STATISTICS */
4315 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
4316 close_socket(csp->cfd);
4317 csp->flags &= ~CSP_FLAG_ACTIVE;
4321 #undef SELECTED_ONE_OPTION
4322 /* end of cpp switch () */
4324 if (child_id < 0) /* failed */
4326 char buf[BUFFER_SIZE];
4328 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
4330 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
4332 write_socket(csp->cfd, buf, strlen(buf));
4333 close_socket(csp->cfd);
4334 csp->flags &= ~CSP_FLAG_ACTIVE;
4345 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
4347 /* Clean up. Aim: free all memory (no leaks) */
4348 #ifdef FEATURE_GRACEFUL_TERMINATION
4350 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
4352 unload_current_config_file();
4353 unload_current_actions_file();
4354 unload_current_re_filterfile();
4355 #ifdef FEATURE_TRUST
4356 unload_current_trust_file();
4359 if (config->multi_threaded)
4366 } while ((clients->next != NULL) && (--i > 0));
4370 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
4381 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
4382 /* Cleanup - remove taskbar icon etc. */
4387 #endif /* FEATURE_GRACEFUL_TERMINATION */