1 const char jcc_rcs[] = "$Id: jcc.c,v 1.215 2008/12/24 17:06:19 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 1.215 2008/12/24 17:06:19 fabiankeil
37 * Keep a thread around to timeout alive connections
38 * even if no new requests are coming in.
40 * Revision 1.214 2008/12/20 14:53:55 fabiankeil
41 * Add config option socket-timeout to control the time
42 * Privoxy waits for data to arrive on a socket. Useful
43 * in case of stale ssh tunnels or when fuzz-testing.
45 * Revision 1.213 2008/12/15 18:45:51 fabiankeil
46 * When logging crunches, log the whole URL, so one can easily
47 * differentiate between vanilla HTTP and CONNECT requests.
49 * Revision 1.212 2008/12/14 15:46:22 fabiankeil
50 * Give crunched requests their own log level.
52 * Revision 1.211 2008/12/06 10:05:03 fabiankeil
53 * Downgrade "Received x bytes while expecting y." message to
54 * LOG_LEVEL_CONNECT as it doesn't necessarily indicate an error.
56 * Revision 1.210 2008/12/02 22:03:18 fabiankeil
57 * Don't miscalculate byte_count if we don't get all the
58 * server headers with one read_socket() call. With keep-alive
59 * support enabled, this caused delays until the server closed
62 * Revision 1.209 2008/11/27 09:44:04 fabiankeil
63 * Cosmetics for the last commit: Don't watch out for
64 * the last chunk if the content isn't chunk-encoded or
65 * if we already determined the content length previously.
67 * Revision 1.208 2008/11/26 18:24:17 fabiankeil
68 * Recognize that the server response is complete if the
69 * last chunk is read together with the server headers.
72 * Revision 1.207 2008/11/25 17:25:16 fabiankeil
73 * Don't convert the client-header list to text until we need to.
75 * Revision 1.206 2008/11/23 17:00:11 fabiankeil
76 * Some more chat() cosmetics.
78 * Revision 1.205 2008/11/16 12:43:49 fabiankeil
79 * Turn keep-alive support into a runtime feature
80 * that is disabled by setting keep-alive-timeout
81 * to a negative value.
83 * Revision 1.204 2008/11/06 19:42:17 fabiankeil
84 * Fix last-chunk detection hack to also apply
85 * if buf[] contains nothing but the last-chunk.
87 * Revision 1.203 2008/11/06 18:34:35 fabiankeil
88 * Factor receive_client_request() and
89 * parse_client_request() out of chat().
91 * Revision 1.202 2008/11/02 18:40:34 fabiankeil
92 * If we received a different amount of data than we expected,
93 * log a warning and make sure the server socket isn't reused.
95 * Revision 1.201 2008/11/02 16:48:20 fabiankeil
96 * Revert revision 1.195 and try again.
98 * Revision 1.200 2008/10/26 16:53:18 fabiankeil
101 * Revision 1.199 2008/10/26 15:36:10 fabiankeil
102 * Remove two debug messages with LOG_LEVEL_INFO.
104 * Revision 1.198 2008/10/22 15:19:55 fabiankeil
105 * Once More, With Feeling: if there is no logfile
106 * because the user didn't specify one, we shouldn't
107 * call init_error_log() after receiving SIGHUP either.
109 * Revision 1.197 2008/10/20 17:02:40 fabiankeil
110 * If SIGHUP is received while we aren't running in daemon
111 * mode, calling init_error_log() would be a mistake.
113 * Revision 1.196 2008/10/16 09:16:41 fabiankeil
114 * - Fix two gcc44 conversion warnings.
115 * - Don't bother logging the last five bytes
118 * Revision 1.195 2008/10/13 16:04:37 fabiankeil
119 * Make sure we don't try to reuse tainted server sockets.
121 * Revision 1.194 2008/10/12 18:35:18 fabiankeil
122 * The last commit was a bit too ambitious, apparently the content
123 * length adjustment is only necessary if we aren't buffering.
125 * Revision 1.193 2008/10/12 15:57:35 fabiankeil
126 * Fix content length calculation if we read headers
127 * and the start of the body at once. Now that we have
128 * FEATURE_CONNECTION_KEEP_ALIVE, it actually matters.
130 * Revision 1.192 2008/10/11 18:19:14 fabiankeil
131 * Even more chat() cosmetics.
133 * Revision 1.191 2008/10/11 18:00:14 fabiankeil
134 * Reformat some comments in chat().
136 * Revision 1.190 2008/10/11 14:58:00 fabiankeil
137 * In case of chunk-encoded content, stop reading if
138 * the buffer looks like it ends with the last chunk.
140 * Revision 1.189 2008/10/11 09:53:00 fabiankeil
141 * Let server_response_is_complete() deal properly with
142 * content that is neither buffered nor read all at once.
144 * Revision 1.188 2008/10/09 18:21:41 fabiankeil
145 * Flush work-in-progress changes to keep outgoing connections
146 * alive where possible. Incomplete and mostly #ifdef'd out.
148 * Revision 1.187 2008/09/07 12:35:05 fabiankeil
149 * Add mutex lock support for _WIN32.
151 * Revision 1.186 2008/09/04 08:13:58 fabiankeil
152 * Prepare for critical sections on Windows by adding a
153 * layer of indirection before the pthread mutex functions.
155 * Revision 1.185 2008/08/30 12:03:07 fabiankeil
156 * Remove FEATURE_COOKIE_JAR.
158 * Revision 1.184 2008/08/22 15:34:45 fabiankeil
159 * - Silence LLVM/Clang complaint.
160 * - Make received_hup_signal static.
161 * - Hide definitions for basedir, pidfile and received_hup_signal
162 * from __EMX__ as they only seem to be used in case of #ifdef unix.
164 * Revision 1.183 2008/08/21 07:09:35 fabiankeil
165 * Accept Shoutcast responses again. Problem reported
166 * and fix suggested by Stefan in #2062860.
168 * Revision 1.182 2008/06/27 11:13:56 fabiankeil
169 * Fix possible NULL-pointer dereference reported
170 * by din_a4 in #2003937. Pointy hat to me.
172 * Revision 1.181 2008/05/21 15:47:15 fabiankeil
173 * Streamline sed()'s prototype and declare
174 * the header parse and add structures static.
176 * Revision 1.180 2008/05/21 15:26:32 fabiankeil
177 * - Mark csp as immutable for send_crunch_response().
178 * - Fix comment spelling.
180 * Revision 1.179 2008/05/20 20:13:32 fabiankeil
181 * Factor update_server_headers() out of sed(), ditch the
182 * first_run hack and make server_patterns_light static.
184 * Revision 1.178 2008/05/10 13:23:38 fabiankeil
185 * Don't provide get_header() with the whole client state
186 * structure when it only needs access to csp->iob.
188 * Revision 1.177 2008/05/10 11:51:12 fabiankeil
189 * Make the "read the rest of the headers" loop a bit more readable.
191 * Revision 1.176 2008/05/10 11:37:57 fabiankeil
192 * - Instead of logging when the IIS5 hack is enabled, log when it fails.
193 * - Remove useless comment.
195 * Revision 1.175 2008/05/09 18:53:59 fabiankeil
196 * Fix comment grammar.
198 * Revision 1.174 2008/05/07 18:05:53 fabiankeil
199 * Remove the pointless buffer in client_protocol_is_unsupported().
201 * Revision 1.173 2008/05/06 15:09:00 fabiankeil
202 * Least-effort fix for bug #1821930 (reported by Lee):
203 * If the response doesn't look like HTTP,
204 * tell the client and log the problem.
206 * Revision 1.172 2008/04/16 16:38:21 fabiankeil
207 * Don't pass the whole csp structure to flush_socket()
208 * when it only needs a file descriptor and a buffer.
210 * Revision 1.171 2008/03/27 18:27:25 fabiankeil
211 * Remove kill-popups action.
213 * Revision 1.170 2008/03/06 16:33:46 fabiankeil
214 * If limit-connect isn't used, don't limit CONNECT requests to port 443.
216 * Revision 1.169 2008/03/04 18:30:39 fabiankeil
217 * Remove the treat-forbidden-connects-like-blocks action. We now
218 * use the "blocked" page for forbidden CONNECT requests by default.
220 * Revision 1.168 2008/03/02 12:25:25 fabiankeil
221 * Also use shiny new connect_port_is_forbidden() in jcc.c.
223 * Revision 1.167 2008/02/23 16:57:12 fabiankeil
224 * Rename url_actions() to get_url_actions() and let it
225 * use the standard parameter ordering.
227 * Revision 1.166 2008/02/23 16:33:43 fabiankeil
228 * Let forward_url() use the standard parameter ordering
229 * and mark its second parameter immutable.
231 * Revision 1.165 2008/02/02 19:36:56 fabiankeil
232 * Remove the "Listening ... for local connections only" log message.
233 * Whether or not remote connections are able to reach Privoxy is up
234 * to the operating system.
236 * Revision 1.164 2007/12/16 18:32:46 fabiankeil
237 * Prevent the log messages for CONNECT requests to unacceptable
238 * ports from printing the limit-connect argument as [null] if
239 * limit-connect hasn't been explicitly enabled.
241 * Revision 1.163 2007/12/13 01:47:11 david__schmidt
242 * Make sure all console-mode apps get a usage() instance
244 * Revision 1.162 2007/12/06 17:54:57 fabiankeil
245 * Reword NO_SERVER_DATA_RESPONSE to make it harder
246 * to misunderstand what the message is all about.
248 * Revision 1.161 2007/12/04 19:44:22 fabiankeil
249 * Unbreak trustfile which previously didn't work without
250 * FEATURE_TOGGLE. Fixes BR#1843585, reported by Lee.
252 * Revision 1.160 2007/11/29 18:00:29 fabiankeil
253 * Plug memory leak. Spotted by Valgrind, triggered by
254 * Privoxy-Regression-Test feeding proxyfuzz.py.
256 * Revision 1.159 2007/11/24 14:34:09 fabiankeil
257 * In the HTTP snipplets, refer to the client as client.
259 * Revision 1.158 2007/11/11 16:44:17 fabiankeil
260 * Emit a log message when activating the MS IIS5 hack.
262 * Revision 1.157 2007/11/03 17:34:49 fabiankeil
263 * Log the "weak randomization factor" warning only
264 * once for mingw32 and provide some more details.
266 * Revision 1.156 2007/11/01 18:20:58 fabiankeil
267 * Initialize log module after initializing mutexes, future
268 * deadlocks in that code should now work cross-platform.
270 * Revision 1.155 2007/10/23 20:12:45 fabiankeil
271 * Fix first CSUCCEED line to end in \r\n as required by RFC1945.
272 * Reported by Bert van Leeuwen in BR#1818808.
274 * Revision 1.154 2007/10/19 17:00:08 fabiankeil
275 * Downgrade "Flushing header and buffers" message to LOG_LEVEL_INFO.
277 * Revision 1.153 2007/10/14 14:12:41 fabiankeil
278 * When in daemon mode, close stderr after the configuration file has been
279 * parsed the first time. If logfile isn't set, stop logging. Fixes BR#897436.
281 * Revision 1.152 2007/10/04 18:03:34 fabiankeil
282 * - Fix a crash when parsing invalid requests whose first header
283 * is rejected by get_header(). Regression (re?)introduced
284 * in r1.143 by yours truly.
285 * - Move ACTION_VANILLA_WAFER handling into parsers.c's
286 * client_cookie_adder() to make sure send-vanilla-wafer can be
287 * controlled through tags (and thus regression-tested).
289 * Revision 1.151 2007/09/29 10:21:16 fabiankeil
290 * - Move get_filter_function() from jcc.c to filters.c
291 * so the filter functions can be static.
292 * - Don't bother filtering body-less responses.
294 * Revision 1.150 2007/09/28 16:39:29 fabiankeil
295 * Execute content filters through execute_content_filter().
297 * Revision 1.149 2007/09/04 15:08:48 fabiankeil
298 * Initialize req to NULL to make sure it's defined if the
299 * first read_socket() call fails. Reported by icmp30.
301 * Revision 1.148 2007/08/26 16:47:13 fabiankeil
302 * Add Stephen Gildea's --pre-chroot-nslookup patch [#1276666],
303 * extensive comments moved to user manual.
305 * Revision 1.147 2007/08/25 14:42:40 fabiankeil
306 * Don't crash if a broken header filter wiped out the request line.
308 * Revision 1.146 2007/08/20 17:09:32 fabiankeil
309 * Fix byte_count calculation in case of flushes
310 * and don't parse the server headers a second time.
312 * Revision 1.145 2007/08/19 13:13:31 fabiankeil
313 * - If there's a connection problem after we already forwarded
314 * parts of the original content, just hang up. Fixes BR#1776724.
315 * - Fix warnings about unused code on mingw32.
316 * - In case of flushes, calculate the byte count
317 * less incorrectly (I think).
319 * Revision 1.144 2007/08/11 14:43:22 fabiankeil
320 * Add some more prototypes for static functions.
322 * Revision 1.143 2007/08/05 13:58:19 fabiankeil
323 * Comment out request_contains_null_bytes() until it's used again.
325 * Revision 1.142 2007/08/05 13:50:26 fabiankeil
326 * #1763173 from Stefan Huehner: s@const static@static const@
327 * and declare some more functions static.
329 * Revision 1.141 2007/08/04 09:56:23 fabiankeil
330 * - Log rejected CONNECT requests with LOG_LEVEL_INFO
331 * and explain why they were rejected in the first place.
332 * - Fix the LOG_LEVEL_CLF message for crunches of unallowed
333 * CONNECT requests. The request line was missing.
334 * - Add two more XXX reminders as we don't have enough already.
336 * Revision 1.140 2007/07/21 11:51:36 fabiankeil
337 * As Hal noticed, checking dispatch_cgi() as the last cruncher
338 * looks like a bug if CGI requests are blocked unintentionally,
339 * so don't do it unless the user enabled the new config option
340 * "allow-cgi-request-crunching".
342 * Revision 1.139 2007/07/14 07:46:41 fabiankeil
343 * - Allow to rewrite the request destination behind the client's back.
344 * - Turn the weird-looking unconditional for loop that
345 * reads the client request into a conditional while loop.
346 * Move the stuff that only runs once out of the loop.
347 * - Move parts of chat(), server_content_type() and the
348 * necessary stuff to fix BR#1750917 into get_filter_function().
350 * Revision 1.138 2007/06/03 18:45:18 fabiankeil
351 * Temporary workaround for BR#1730105.
353 * Revision 1.137 2007/06/01 18:16:36 fabiankeil
354 * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
355 * deadlocks and crashes on OpenBSD and possibly other OS with neither
356 * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
357 * Thanks to Ralf Horstmann for report and solution.
359 * Revision 1.136 2007/06/01 16:41:11 fabiankeil
360 * Add forward-override{} to change the forwarding settings through
361 * action sections. This is mainly interesting to forward different
362 * clients differently (for example based on User-Agent or request
365 * Revision 1.135 2007/05/24 17:03:50 fabiankeil
366 * - Let usage() mention the --chroot parameter.
367 * - Use read_socket() consistently and always leave
368 * the last buffer byte alone, even in cases where
369 * null termination (currently) doesn't matter.
371 * Revision 1.134 2007/05/16 14:59:46 fabiankeil
372 * - Fix config file loading on Unix if no config file is specified.
373 * Since r1.97 Privoxy would always interpret the last argument as
374 * config file, even if it's a valid command line option.
375 * - Abort in case of unrecognized command line options. Closes #1719696.
376 * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
377 * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
379 * Revision 1.133 2007/05/04 11:23:19 fabiankeil
380 * - Don't rerun crunchers that only depend on the request URL.
381 * - Don't count redirects and CGI requests as "blocked requests".
383 * Revision 1.132 2007/04/25 15:15:17 fabiankeil
384 * Support crunching based on tags created by server-header taggers.
386 * Revision 1.131 2007/04/22 13:24:50 fabiankeil
387 * Make HTTP snippets static (again). Add a Content-Type for those
388 * with content so the browser doesn't guess it based on the URL.
390 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
391 * Move crunching and request line rebuilding out of chat().
393 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
394 * Introduce tags as alternative way to specify which
395 * actions apply to a request. At the moment tags can be
396 * created based on client and server headers.
398 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
399 * Don't CLF-log CONNECT requests twice.
401 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
402 * Log the source address for ACL-related connection drops.
404 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
405 * New config option: enforce-blocks.
407 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
408 * - Move null byte check into separate function.
409 * - Don't confuse the client with error pages
410 * if a CONNECT request was already confirmed.
412 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
413 * Speed up NULL byte escaping and only log the complete
414 * NULL byte requests with header debugging enabled.
416 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
417 * Answer requests that contain NULL bytes with
418 * a custom response instead of waiting for more
419 * data until the client eventually hangs up.
421 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
422 * - Move delivery and logging of crunched responses
423 * from chat() into send_crunch_response().
424 * - Display the reason for generating http_responses.
425 * - Log the content length for LOG_LEVEL_CLF correctly
426 * (still incorrect for some fixed responses).
427 * - Reword an incorrect comment about
428 * treat-forbidden-connects-like-blocks violating
430 * - Add some log messages.
432 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
433 * Move mutex initialization into separate
434 * function and exit in case of errors.
436 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
437 * - Start to reduce chat()'s line count and move
438 * parts of it into separate functions.
439 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
441 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
442 * - Add Proxy-Agent header to HTTP snippets that are
443 * supposed to reach HTTP clients only.
444 * - Made a few CONNECT log messages more descriptive.
445 * - Catch completely empty server responses (as seen
446 * with Tor's fake ".noconnect" top level domain).
447 * - Use shiny new "forwarding-failed" template for socks errors.
449 * Revision 1.118 2007/01/07 07:43:43 joergs
450 * AmigaOS4 support added.
452 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
453 * Added config option accept-intercepted-requests
454 * and disabled it by default.
456 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
457 * Reverted parts of my last commit
458 * to keep error handling working.
460 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
461 * Fixed gcc43 conversion warnings.
463 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
464 * Fix -pedantic ISO C warning about converting
465 * from function pointer to object pointer.
467 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
468 * Silence compiler warning I introduced with my last commit.
470 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
471 * Mutex protect rand() if POSIX threading
472 * is used, warn the user if that's not possible
473 * and stop using it on _WIN32 where it could
476 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
477 * Don't prevent core dumps by catching SIGABRT.
478 * It's rude and makes debugging unreasonable painful.
480 * Revision 1.110 2006/12/13 14:52:53 etresoft
481 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
483 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
484 * Privoxy is now able to run as intercepting
485 * proxy in combination with any packet filter
486 * that does the port redirection. The destination
487 * is extracted from the "Host:" header which
488 * should be available for nearly all requests.
490 * Moved HTTP snipplets into jcc.c.
491 * Added error message for gopher proxy requests.
493 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
494 * Only unlink the pidfile if it's actually used.
496 * Change order of interception checks to make
497 * it possible to block or redirect requests for
500 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
501 * Make pthread mutex locking more generic. Instead of
502 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
503 * and use mutex locking unless there is an _r function
504 * available. Better safe than sorry.
506 * Fixes "./configure --disable-pthread" and should result
507 * in less threading-related problems on pthread-using platforms,
508 * but it still doesn't fix BR#1122404.
510 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
511 * Move pthread.h inclusion from jcc.c to jcc.h.
512 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
514 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
515 * Don't exit after receiving the second SIGHUP on Solaris.
517 * Fixes BR 1052235, but the same problem may exist on other
518 * systems. Once 3.0.6 is out we should use sigset()
519 * where available and see if it breaks anything.
521 * Revision 1.104 2006/09/23 13:26:38 roro
522 * Replace TABs by spaces in source code.
524 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
525 * Fix +redirect{}. Didn't work with -fast-redirects.
527 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
528 * Respond with 400 and a short text message
529 * if the client tries to use Privoxy as FTP proxy.
531 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
532 * Make number of retries in case of forwarded-connect problems
533 * a config file option (forwarded-connect-retries) and use 0 as
536 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
537 * Set random(3) seed.
539 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
540 * Follow the OpenBSD port's lead and protect the resolve
541 * functions on OpenBSD as well.
543 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
544 * --user fix. Only use the user as group if no group is specified.
545 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
547 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
548 * Windows service (re-)integration
552 * --install[:service_name]
553 * --uninstall[:service_name]
556 * They work as follows:
557 * --install will create a service for you and then terminate.
558 * By default the service name will be "privoxy" (without the quotes).
559 * However you can run multiple services if you wish, just by adding
560 * a colon and then a name (no spaces).
562 * --uninstall follows the exact same rules a --install.
564 * --service is used when the program is executed by the service
565 * control manager, and in normal circumstances would never be
566 * used as a command line argument.
568 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
569 * Windows service integration
571 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
572 * Incorporate Fabian Keil's patch work:
573 http://www.fabiankeil.de/sourcecode/privoxy/
575 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
576 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
577 * with what was really the latest development (the v_3_0_branch branch)
579 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
580 * Thanks to Jindrich Makovicka for a race condition fix for the log
581 * file. The race condition remains for non-pthread implementations.
582 * Reference patch #1175720.
584 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
585 * Add the ability to check jpeg images for invalid
586 * lengths of comment blocks. Defensive strategy
587 * against the exploit:
588 * Microsoft Security Bulletin MS04-028
589 * Buffer Overrun in JPEG Processing (GDI+) Could
590 * Allow Code Execution (833987)
591 * Enabled with +inspect-jpegs in actions files.
593 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
594 * - Fixed usage info for non-unix platforms
595 * - Fixed small cmdline parsing bug
597 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
598 * Diagnostics: Now preserve the returncode of pthread_create
599 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
601 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
602 * No longer ignore SIGCHLD. Fixes bug #769381
604 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
605 * Close jarfile on graceful exit, remove stray line
607 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
608 * Cosmetics: Killed a warning, a typo and an allocation left at exit
610 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
611 * No longer rely on non-POSIX.1 extensions of getcwd().
614 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
615 * Replaced setenv() by posix-compliant putenv()
616 * Thanks to Neil McCalden (nmcc AT users.sf.net).
618 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
619 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
621 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
622 * Clean-up and extension of improvements for forked mode:
623 * - Child's return code now consists of flags RC_FLAG_*
624 * - Reporting toggle to parent now properly #ifdef'ed
625 * - Children now report blocking to parent. This enables
626 * statistics in forked mode
628 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
629 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
630 * Children now report having been toggled through _exit(17), parents
631 * watch for that code and toggle themselves if found.
633 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
634 * Wrapping all *_r functions (the non-_r versions of them) with
635 * mutex semaphores for OSX. Hopefully this will take care of all
636 * of those pesky crash reports.
638 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
639 * Fixed two mostly harmless mem leaks
641 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
642 * Fix: Head of global clients list now initialized to NULL
644 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
645 * Added basic support for OPTIONS and TRACE HTTP methods:
646 * - New interceptor direct_response() added in chat().
647 * - sed() moved to earlier in the process, so that the
648 * Host: header is evaluated before actions and forwarding
651 * Revision 1.92 2002/05/08 16:00:46 oes
652 * Chat's buffer handling:
653 * - Fixed bug with unchecked out-of-mem conditions
654 * while reading client request & server headers
655 * - No longer predict if the buffer limit will be exceeded
656 * in the next read -- check add_to_iob's new
657 * return code. If buffer couldn't be extended
658 * (policy or out-of-mem) while
659 * - reading from client: abort
660 * - reading server headers: send error page
661 * - buffering server body for filter: flush,
662 * and if that fails: send error page
664 * Revision 1.91 2002/04/08 20:35:58 swa
667 * Revision 1.90 2002/04/02 14:57:28 oes
668 * Made sending wafers independent of FEATURE_COOKIE_JAR
670 * Revision 1.89 2002/03/31 17:18:59 jongfoster
671 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
673 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
674 * More compiler warning message maintenance
676 * Revision 1.87 2002/03/26 22:29:54 swa
677 * we have a new homepage!
679 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
680 * Workaround for closing the jarfile before load_config() comes around again
682 * Revision 1.85 2002/03/24 15:23:33 jongfoster
685 * Revision 1.84 2002/03/24 13:25:43 swa
686 * name change related issues
688 * Revision 1.83 2002/03/16 23:54:06 jongfoster
689 * Adding graceful termination feature, to help look for memory leaks.
690 * If you enable this (which, by design, has to be done by hand
691 * editing config.h) and then go to http://i.j.b/die, then the program
692 * will exit cleanly after the *next* request. It should free all the
693 * memory that was used.
695 * Revision 1.82 2002/03/13 00:27:05 jongfoster
698 * Revision 1.81 2002/03/12 01:42:50 oes
699 * Introduced modular filters
701 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
702 * OS/2 port maintenance:
703 * - Fixed EMX build - it had decayed a little
704 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
705 * substituted a memset for now.
707 * Revision 1.79 2002/03/09 20:03:52 jongfoster
708 * - Making various functions return int rather than size_t.
709 * (Undoing a recent change). Since size_t is unsigned on
710 * Windows, functions like read_socket that return -1 on
711 * error cannot return a size_t.
713 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
714 * crashes, and also frequently caused JB to jump to 100%
715 * CPU and stay there. (Because it thought it had just
716 * read ((unsigned)-1) == 4Gb of data...)
718 * - The signature of write_socket has changed, it now simply
719 * returns success=0/failure=nonzero.
721 * - Trying to get rid of a few warnings --with-debug on
722 * Windows, I've introduced a new type "jb_socket". This is
723 * used for the socket file descriptors. On Windows, this
724 * is SOCKET (a typedef for unsigned). Everywhere else, it's
725 * an int. The error value can't be -1 any more, so it's
726 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
727 * Windows it maps to the #define INVALID_SOCKET.)
729 * - The signature of bind_port has changed.
731 * Revision 1.78 2002/03/08 21:35:04 oes
732 * Added optional group supplement to --user option. Will now use default group of user if no group given
734 * Revision 1.77 2002/03/07 03:52:06 oes
735 * - Fixed compiler warnings etc
736 * - Improved handling of failed DNS lookups
738 * Revision 1.76 2002/03/06 22:54:35 jongfoster
739 * Automated function-comment nitpicking.
741 * Revision 1.75 2002/03/06 10:02:19 oes
742 * Fixed stupid bug when --user was not given
744 * Revision 1.74 2002/03/06 00:49:31 jongfoster
745 * Fixing warning on Windows
746 * Making #ifdefs that refer to the same variable consistently
747 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
749 * Revision 1.73 2002/03/05 23:57:30 hal9
750 * Stray character 's' on line 1618 was breaking build.
752 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
753 * - Re-enable OS/2 building after new parms were added
754 * - Fix false out of memory report when resolving CGI templates when no IP
755 * address is available of failed attempt (a la no such domain)
757 * Revision 1.71 2002/03/05 18:13:56 oes
758 * Added --user option
760 * Revision 1.70 2002/03/05 04:52:42 oes
761 * Deleted non-errlog debugging code
763 * Revision 1.69 2002/03/04 23:50:00 jongfoster
764 * Splitting off bind_port() call into bind_port_helper(), with
767 * Revision 1.68 2002/03/04 20:17:32 oes
770 * Revision 1.67 2002/03/04 18:18:57 oes
771 * - Removed _DEBUG mode
772 * - Cleand up cmdline parsing
773 * - Introduced --no-daemon, --pidfile options
774 * - Cleaned up signal handling:
775 * - Terminate cleanly on INT, TERM and ABRT
776 * - Schedule logfile for re-opening on HUP
777 * - Ignore CHLD and PIPE
778 * - Leave the rest with their default handlers
779 * - Uniform handler registration
780 * - Added usage() function
781 * - Played styleguide police
783 * Revision 1.66 2002/03/03 15:06:55 oes
784 * Re-enabled automatic config reloading
786 * Revision 1.65 2002/03/03 14:49:11 oes
787 * Fixed CLF logging: Now uses client's original HTTP request
789 * Revision 1.64 2002/03/03 09:18:03 joergs
790 * Made jumbjuster work on AmigaOS again.
792 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
793 * Clean up a little CRLF unpleasantness that suddenly appeared
795 * Revision 1.62 2002/02/20 23:17:23 jongfoster
796 * Detecting some out-of memory conditions and exiting with a log message.
798 * Revision 1.61 2002/01/17 21:01:52 jongfoster
799 * Moving all our URL and URL pattern parsing code to urlmatch.c.
801 * Revision 1.60 2001/12/30 14:07:32 steudten
802 * - Add signal handling (unix)
803 * - Add SIGHUP handler (unix)
804 * - Add creation of pidfile (unix)
805 * - Add action 'top' in rc file (RH)
806 * - Add entry 'SIGNALS' to manpage
807 * - Add exit message to logfile (unix)
809 * Revision 1.59 2001/12/13 14:07:18 oes
810 * Fixed Bug: 503 error page now sent OK
812 * Revision 1.58 2001/11/30 23:37:24 jongfoster
813 * Renaming the Win32 config file to config.txt - this is almost the
814 * same as the corresponding UNIX name "config"
816 * Revision 1.57 2001/11/16 00:47:43 jongfoster
817 * Changing the tty-disconnection code to use setsid().
819 * Revision 1.56 2001/11/13 20:20:54 jongfoster
820 * Tabs->spaces, fixing a bug with missing {} around an if()
822 * Revision 1.55 2001/11/13 20:14:53 jongfoster
823 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
825 * Revision 1.54 2001/11/07 00:03:14 steudten
826 * Give reliable return value if an error
827 * occurs not just 0 with new daemon mode.
829 * Revision 1.53 2001/11/05 21:41:43 steudten
830 * Add changes to be a real daemon just for unix os.
831 * (change cwd to /, detach from controlling tty, set
832 * process group and session leader to the own process.
834 * Add some fatal-error log message for failed malloc().
835 * Add '-d' if compiled with 'configure --with-debug' to
836 * enable debug output.
838 * Revision 1.52 2001/10/26 20:11:20 jongfoster
839 * Fixing type mismatch
841 * Revision 1.51 2001/10/26 17:38:28 oes
844 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
845 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
846 * threads to call select() simultaneously. So, it's time to do a real, live,
847 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
848 * (native). Both versions will work, but using __OS2__ offers multi-threading.
850 * Revision 1.49 2001/10/23 21:41:35 jongfoster
851 * Added call to initialize the (statically-allocated of course)
852 * "out of memory" CGI response.
854 * Revision 1.48 2001/10/10 19:56:46 jongfoster
855 * Moving some code that wasn't cookie-related out of an #ifdef
858 * Revision 1.47 2001/10/10 16:44:36 oes
859 * Added CONNECT destination port limitation check
861 * Revision 1.46 2001/10/08 15:17:41 oes
862 * Re-enabled SSL forwarding
864 * Revision 1.45 2001/10/07 15:42:11 oes
865 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
867 * Moved downgrading of the HTTP version from parse_http_request to
868 * chat(), since we can't decide if it is necessary before we have
869 * determined the actions for the URL. The HTTP command is now
870 * *always* re-built so the repairs need no longer be special-cased.
872 * filter_popups now gets a csp pointer so it can raise the new
873 * CSP_FLAG_MODIFIED flag.
877 * Added configurable size limit for the IOB. If the IOB grows so
878 * large that the next read would exceed the limit, the header
879 * is generated, and the header & unfiltered buffer are flushed
880 * to the client. Chat then continues in non-buffering,
881 * non-filtering body mode.
883 * Revision 1.44 2001/10/02 18:13:57 oes
886 * Revision 1.43 2001/10/02 15:32:13 oes
887 * Moved generation of hdr
889 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
890 * Cleaning up 2 compiler warnings on OS/2.
892 * Revision 1.41 2001/09/16 17:05:14 jongfoster
893 * Removing unused #include showarg.h
895 * Revision 1.40 2001/09/16 15:41:45 jongfoster
896 * Fixing signed/unsigned comparison warning.
898 * Revision 1.39 2001/09/16 13:21:27 jongfoster
899 * Changes to use new list functions.
901 * Revision 1.38 2001/09/16 13:01:46 jongfoster
902 * Removing redundant function call that zeroed zalloc()'d memory.
904 * Revision 1.37 2001/09/10 11:12:24 oes
905 * Deleted unused variable
907 * Revision 1.36 2001/09/10 10:56:15 oes
908 * Silenced compiler warnings
910 * Revision 1.35 2001/07/31 14:44:22 oes
911 * Deleted unused size parameter from filter_popups()
913 * Revision 1.34 2001/07/30 22:08:36 jongfoster
914 * Tidying up #defines:
915 * - All feature #defines are now of the form FEATURE_xxx
916 * - Permanently turned off WIN_GUI_EDIT
917 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
919 * Revision 1.33 2001/07/29 19:32:00 jongfoster
920 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
922 * Revision 1.32 2001/07/29 18:47:05 jongfoster
923 * Adding missing #include "loadcfg.h"
925 * Revision 1.31 2001/07/29 12:17:48 oes
926 * Applied pthread fix by Paul Lieverse
928 * Revision 1.30 2001/07/25 22:57:13 jongfoster
929 * __BEOS__ no longer overrides FEATURE_PTHREAD.
930 * This is because FEATURE_PTHREAD will soon be widely used, so I
931 * want to keep it simple.
933 * Revision 1.29 2001/07/24 12:47:06 oes
934 * Applied BeOS support update by Eugenia
936 * Revision 1.28 2001/07/23 13:26:12 oes
937 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
939 * Revision 1.27 2001/07/19 19:09:47 haroon
940 * - Added code to take care of the situation where while processing the first
941 * server response (which includes the server header), after finding the end
942 * of the headers we were not looking past the end of the headers for
943 * content modification. I enabled it for filter_popups.
944 * Someone else should look to see if other similar operations should be
945 * done to the discarded portion of the buffer.
947 * Note 2001/07/20: No, the other content modification mechanisms will process
948 * the whole iob later anyway. --oes
950 * Revision 1.26 2001/07/18 12:31:36 oes
953 * Revision 1.25 2001/07/15 19:43:49 jongfoster
954 * Supports POSIX threads.
955 * Also removed some unused #includes.
957 * Revision 1.24 2001/07/13 14:00:40 oes
958 * - Generic content modification scheme:
959 * Each feature has its own applicability flag that is set
960 * from csp->action->flags.
961 * Replaced the "filtering" int flag , by a function pointer
962 * "content_filter" to the function that will do the content
963 * modification. If it is != NULL, the document will be buffered
964 * and processed through *content_filter, which must set
965 * csp->content_length and return a modified copy of the body
966 * or return NULL (on failiure).
967 * - Changed csp->is_text to the more generic bitmap csp->content_type
968 * which can currently take the valued CT_TEXT or CT_GIF
970 * - Removed all #ifdef PCRS
972 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
973 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
974 * the `block_acl' call. This prevents a compilation error when the user
975 * does not wish to use the "ACL" feature.
977 * Revision 1.22 2001/06/29 21:45:41 oes
978 * Indentation, CRLF->LF, Tab-> Space
980 * Revision 1.21 2001/06/29 13:29:36 oes
981 * - Cleaned up, improved comments
982 * - Unified all possible interceptors (CGI,
983 * block, trust, fast_redirect) in one
984 * place, with one (CGI) answer generation
985 * mechansim. Much clearer now.
986 * - Removed the GIF image generation, which
987 * is now done in filters.c:block_url()
988 * - Made error conditions like domain lookup
989 * failiure or (various) problems while talking
990 * to the server use cgi.c:error_response()
991 * instead of generating HTML/HTTP in chat() (yuck!)
992 * - Removed logentry from cancelled commit
994 * Revision 1.20 2001/06/09 10:55:28 jongfoster
995 * Changing BUFSIZ ==> BUFFER_SIZE
997 * Revision 1.19 2001/06/07 23:12:52 jongfoster
998 * Replacing function pointer in struct gateway with a directly
999 * called function forwarded_connect().
1000 * Replacing struct gateway with struct forward_spec
1002 * Revision 1.18 2001/06/03 19:12:16 oes
1003 * introduced new cgi handling
1005 * Revision 1.17 2001/06/01 20:07:23 jongfoster
1006 * Now uses action +image-blocker{} rather than config->tinygif
1008 * Revision 1.16 2001/06/01 18:49:17 jongfoster
1009 * Replaced "list_share" with "list" - the tiny memory gain was not
1010 * worth the extra complexity.
1012 * Revision 1.15 2001/05/31 21:24:47 jongfoster
1013 * Changed "permission" to "action" throughout.
1014 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
1015 * Moved vanilla wafer check into chat(), since we must now
1016 * decide whether or not to add it based on the URL.
1018 * Revision 1.14 2001/05/29 20:14:01 joergs
1019 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
1022 * Revision 1.13 2001/05/29 09:50:24 jongfoster
1023 * Unified blocklist/imagelist/permissionslist.
1024 * File format is still under discussion, but the internal changes
1025 * are (mostly) done.
1027 * Also modified interceptor behaviour:
1028 * - We now intercept all URLs beginning with one of the following
1029 * prefixes (and *only* these prefixes):
1031 * * http://ijbswa.sf.net/config/
1032 * * http://ijbswa.sourceforge.net/config/
1033 * - New interceptors "home page" - go to http://i.j.b/ to see it.
1034 * - Internal changes so that intercepted and fast redirect pages
1035 * are not replaced with an image.
1036 * - Interceptors now have the option to send a binary page direct
1037 * to the client. (i.e. ijb-send-banner uses this)
1038 * - Implemented show-url-info interceptor. (Which is why I needed
1039 * the above interceptors changes - a typical URL is
1040 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
1041 * The previous mechanism would not have intercepted that, and
1042 * if it had been intercepted then it then it would have replaced
1043 * it with an image.)
1045 * Revision 1.12 2001/05/27 22:17:04 oes
1047 * - re_process_buffer no longer writes the modified buffer
1048 * to the client, which was very ugly. It now returns the
1049 * buffer, which it is then written by chat.
1051 * - content_length now adjusts the Content-Length: header
1052 * for modified documents rather than crunch()ing it.
1053 * (Length info in csp->content_length, which is 0 for
1054 * unmodified documents)
1056 * - For this to work, sed() is called twice when filtering.
1058 * Revision 1.11 2001/05/26 17:27:53 jongfoster
1059 * Added support for CLF and fixed LOG_LEVEL_LOG.
1060 * Also did CRLF->LF fix of my previous patch.
1062 * Revision 1.10 2001/05/26 15:26:15 jongfoster
1063 * ACL feature now provides more security by immediately dropping
1064 * connections from untrusted hosts.
1066 * Revision 1.9 2001/05/26 00:28:36 jongfoster
1067 * Automatic reloading of config file.
1068 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
1069 * Most of the global variables have been moved to a new
1070 * struct configuration_spec, accessed through csp->config->globalname
1071 * Most of the globals remaining are used by the Win32 GUI.
1073 * Revision 1.8 2001/05/25 22:43:18 jongfoster
1074 * Fixing minor memory leak and buffer overflow.
1076 * Revision 1.7 2001/05/25 22:34:30 jongfoster
1079 * Revision 1.6 2001/05/23 00:13:58 joergs
1080 * AmigaOS support fixed.
1082 * Revision 1.5 2001/05/22 18:46:04 oes
1084 * - Enabled filtering banners by size rather than URL
1085 * by adding patterns that replace all standard banner
1086 * sizes with the "Junkbuster" gif to the re_filterfile
1088 * - Enabled filtering WebBugs by providing a pattern
1089 * which kills all 1x1 images
1091 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
1092 * which is selected by the (nonstandard and therefore
1093 * capital) letter 'U' in the option string.
1094 * It causes the quantifiers to be ungreedy by default.
1095 * Appending a ? turns back to greedy (!).
1097 * - Added a new interceptor ijb-send-banner, which
1098 * sends back the "Junkbuster" gif. Without imagelist or
1099 * MSIE detection support, or if tinygif = 1, or the
1100 * URL isn't recognized as an imageurl, a lame HTML
1101 * explanation is sent instead.
1103 * - Added new feature, which permits blocking remote
1104 * script redirects and firing back a local redirect
1106 * The feature is conditionally compiled, i.e. it
1107 * can be disabled with --disable-fast-redirects,
1108 * plus it must be activated by a "fast-redirects"
1109 * line in the config file, has its own log level
1110 * and of course wants to be displayed by show-proxy-args
1111 * Note: Boy, all the #ifdefs in 1001 locations and
1112 * all the fumbling with configure.in and acconfig.h
1113 * were *way* more work than the feature itself :-(
1115 * - Because a generic redirect template was needed for
1116 * this, tinygif = 3 now uses the same.
1118 * - Moved GIFs, and other static HTTP response templates
1121 * - Some minor fixes
1123 * - Removed some >400 CRs again (Jon, you really worked
1126 * Revision 1.4 2001/05/21 19:34:01 jongfoster
1127 * Made failure to bind() a fatal error.
1129 * Revision 1.3 2001/05/20 01:21:20 jongfoster
1130 * Version 2.9.4 checkin.
1131 * - Merged popupfile and cookiefile, and added control over PCRS
1132 * filtering, in new "permissionsfile".
1133 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
1134 * file error you now get a message box (in the Win32 GUI) rather
1135 * than the program exiting with no explanation.
1136 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
1138 * - Removed tabs from "config"
1139 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
1140 * - Bumped up version number.
1142 * Revision 1.2 2001/05/17 22:34:44 oes
1143 * - Added hint on GIF char array generation to jcc.c
1144 * - Cleaned CRLF's from the sources and related files
1145 * - Repaired logging for REF and FRC
1147 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
1148 * Initial import of version 2.9.3 source tree
1151 *********************************************************************/
1157 #include <sys/types.h>
1166 # ifndef FEATURE_PTHREAD
1170 # include <windows.h>
1171 # include <process.h>
1172 # endif /* ndef FEATURE_PTHREAD */
1175 # ifndef _WIN_CONSOLE
1176 # include "w32log.h"
1177 # endif /* ndef _WIN_CONSOLE */
1178 # include "w32svrapi.h"
1180 #else /* ifndef _WIN32 */
1182 # if !defined (__OS2__)
1183 # include <unistd.h>
1184 # include <sys/wait.h>
1185 # endif /* ndef __OS2__ */
1186 # include <sys/time.h>
1187 # include <sys/stat.h>
1188 # include <sys/ioctl.h>
1191 #include <sys/termios.h>
1199 # include <signal.h>
1202 # include <socket.h> /* BeOS has select() for sockets only. */
1203 # include <OS.h> /* declarations for threads and stuff. */
1206 # if defined(__EMX__) || defined(__OS2__)
1207 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
1212 #define bzero(B,N) memset(B,0x00,n)
1216 # include <select.h>
1221 #include "project.h"
1224 #include "filters.h"
1225 #include "loaders.h"
1226 #include "parsers.h"
1227 #include "miscutil.h"
1229 #include "jbsockets.h"
1230 #include "gateway.h"
1231 #include "actions.h"
1233 #include "loadcfg.h"
1234 #include "urlmatch.h"
1236 const char jcc_h_rcs[] = JCC_H_VERSION;
1237 const char project_h_rcs[] = PROJECT_H_VERSION;
1240 struct client_state clients[1];
1241 struct file_list files[1];
1243 #ifdef FEATURE_STATISTICS
1244 int urls_read = 0; /* total nr of urls read inc rejected */
1245 int urls_rejected = 0; /* total nr of urls rejected */
1246 #endif /* def FEATURE_STATISTICS */
1248 #ifdef FEATURE_GRACEFUL_TERMINATION
1249 int g_terminate = 0;
1252 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1253 static void sig_handler(int the_signal);
1255 static int client_protocol_is_unsupported(const struct client_state *csp, char *req);
1256 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
1257 static jb_err get_server_headers(struct client_state *csp);
1258 static const char *crunch_reason(const struct http_response *rsp);
1259 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp);
1260 static char *get_request_line(struct client_state *csp);
1261 static jb_err receive_client_request(struct client_state *csp);
1262 static jb_err parse_client_request(struct client_state *csp);
1263 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
1264 static jb_err change_request_destination(struct client_state *csp);
1265 static void chat(struct client_state *csp);
1266 static void serve(struct client_state *csp);
1267 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1268 static void usage(const char *myname);
1270 static void initialize_mutexes(void);
1271 static jb_socket bind_port_helper(struct configuration_spec *config);
1272 static void listen_loop(void);
1275 void serve(struct client_state *csp);
1276 #else /* ifndef AMIGA */
1277 static void serve(struct client_state *csp);
1278 #endif /* def AMIGA */
1281 static int32 server_thread(void *data);
1282 #endif /* def __BEOS__ */
1285 #define sleep(N) Sleep(((N) * 1000))
1289 #define sleep(N) DosSleep(((N) * 100))
1292 #ifdef MUTEX_LOCKS_AVAILABLE
1294 * XXX: Does the locking stuff really belong in this file?
1296 privoxy_mutex_t log_mutex;
1297 privoxy_mutex_t log_init_mutex;
1298 privoxy_mutex_t connection_reuse_mutex;
1300 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
1301 privoxy_mutex_t resolver_mutex;
1302 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
1304 #ifndef HAVE_GMTIME_R
1305 privoxy_mutex_t gmtime_mutex;
1306 #endif /* ndef HAVE_GMTIME_R */
1308 #ifndef HAVE_LOCALTIME_R
1309 privoxy_mutex_t localtime_mutex;
1310 #endif /* ndef HAVE_GMTIME_R */
1313 privoxy_mutex_t rand_mutex;
1314 #endif /* ndef HAVE_RANDOM */
1316 #endif /* def MUTEX_LOCKS_AVAILABLE */
1319 const char *basedir = NULL;
1320 const char *pidfile = NULL;
1321 static int received_hup_signal = 0;
1322 #endif /* defined unix */
1324 /* HTTP snipplets. */
1325 static const char CSUCCEED[] =
1326 "HTTP/1.0 200 Connection established\r\n"
1327 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
1329 static const char CHEADER[] =
1330 "HTTP/1.0 400 Invalid header received from client\r\n"
1331 "Proxy-Agent: Privoxy " VERSION "\r\n"
1332 "Content-Type: text/plain\r\n"
1333 "Connection: close\r\n\r\n"
1334 "Invalid header received from client.\r\n";
1336 static const char FTP_RESPONSE[] =
1337 "HTTP/1.0 400 Invalid request received from client\r\n"
1338 "Content-Type: text/plain\r\n"
1339 "Connection: close\r\n\r\n"
1340 "Invalid request. Privoxy doesn't support FTP.\r\n";
1342 static const char GOPHER_RESPONSE[] =
1343 "HTTP/1.0 400 Invalid request received from client\r\n"
1344 "Content-Type: text/plain\r\n"
1345 "Connection: close\r\n\r\n"
1346 "Invalid request. Privoxy doesn't support gopher.\r\n";
1348 /* XXX: should be a template */
1349 static const char MISSING_DESTINATION_RESPONSE[] =
1350 "HTTP/1.0 400 Bad request received from client\r\n"
1351 "Proxy-Agent: Privoxy " VERSION "\r\n"
1352 "Content-Type: text/plain\r\n"
1353 "Connection: close\r\n\r\n"
1354 "Bad request. Privoxy was unable to extract the destination.\r\n";
1356 /* XXX: should be a template */
1357 static const char NO_SERVER_DATA_RESPONSE[] =
1358 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1359 "Proxy-Agent: Privoxy " VERSION "\r\n"
1360 "Content-Type: text/plain\r\n"
1361 "Connection: close\r\n\r\n"
1362 "Empty server or forwarder response.\r\n"
1363 "The connection has been closed but Privoxy didn't receive any data.\r\n";
1365 /* XXX: should be a template */
1366 static const char INVALID_SERVER_HEADERS_RESPONSE[] =
1367 "HTTP/1.0 502 Server or forwarder response invalid\r\n"
1368 "Proxy-Agent: Privoxy " VERSION "\r\n"
1369 "Content-Type: text/plain\r\n"
1370 "Connection: close\r\n\r\n"
1371 "Bad response. The server or forwarder response doesn't look like HTTP.\r\n";
1374 /* XXX: should be a template */
1375 static const char NULL_BYTE_RESPONSE[] =
1376 "HTTP/1.0 400 Bad request received from client\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 request. Null byte(s) before end of request.\r\n";
1383 /* XXX: should be a template */
1384 static const char MESSED_UP_REQUEST_RESPONSE[] =
1385 "HTTP/1.0 400 Malformed request after rewriting\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. Messed up with header filters.\r\n";
1391 /* A function to crunch a response */
1392 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
1394 /* Crunch function flags */
1395 #define CF_NO_FLAGS 0
1396 /* Cruncher applies to forced requests as well */
1397 #define CF_IGNORE_FORCE 1
1398 /* Crunched requests are counted for the block statistics */
1399 #define CF_COUNT_AS_REJECT 2
1401 /* A crunch function and its flags */
1404 const crunch_func_ptr cruncher;
1408 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
1410 /* Complete list of cruncher functions */
1411 static const struct cruncher crunchers_all[] = {
1412 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
1413 { block_url, CF_COUNT_AS_REJECT },
1414 #ifdef FEATURE_TRUST
1415 { trust_url, CF_COUNT_AS_REJECT },
1416 #endif /* def FEATURE_TRUST */
1417 { redirect_url, CF_NO_FLAGS },
1418 { dispatch_cgi, CF_IGNORE_FORCE},
1422 /* Light version, used after tags are applied */
1423 static const struct cruncher crunchers_light[] = {
1424 { block_url, CF_COUNT_AS_REJECT },
1425 { redirect_url, CF_NO_FLAGS },
1431 * XXX: Don't we really mean
1437 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1438 /*********************************************************************
1440 * Function : sig_handler
1442 * Description : Signal handler for different signals.
1443 * Exit gracefully on TERM and INT
1444 * or set a flag that will cause the errlog
1445 * to be reopened by the main thread on HUP.
1448 * 1 : the_signal = the signal cause this function to call
1452 *********************************************************************/
1453 static void sig_handler(int the_signal)
1459 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1471 received_hup_signal = 1;
1477 * We shouldn't be here, unless we catch signals
1478 * in main() that we can't handle here!
1480 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1488 /*********************************************************************
1490 * Function : client_protocol_is_unsupported
1492 * Description : Checks if the client used a known unsupported
1493 * protocol and deals with it by sending an error
1497 * 1 : csp = Current client state (buffers, headers, etc...)
1498 * 2 : req = the first request line send by the client
1500 * Returns : TRUE if an error response has been generated, or
1501 * FALSE if the request doesn't look invalid.
1503 *********************************************************************/
1504 static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1507 * If it's a FTP or gopher request, we don't support it.
1509 * These checks are better than nothing, but they might
1510 * not work in all configurations and some clients might
1511 * have problems digesting the answer.
1513 * They should, however, never cause more problems than
1514 * Privoxy's old behaviour (returning the misleading HTML
1517 * "Could not resolve http://(ftp|gopher)://example.org").
1519 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1521 const char *response = NULL;
1522 const char *protocol = NULL;
1524 if (!strncmpic(req, "GET ftp://", 10))
1526 response = FTP_RESPONSE;
1531 response = GOPHER_RESPONSE;
1532 protocol = "GOPHER";
1534 log_error(LOG_LEVEL_ERROR,
1535 "%s tried to use Privoxy as %s proxy: %s",
1536 csp->ip_addr_str, protocol, req);
1537 log_error(LOG_LEVEL_CLF,
1538 "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1540 write_socket(csp->cfd, response, strlen(response));
1549 /*********************************************************************
1551 * Function : get_request_destination_elsewhere
1553 * Description : If the client's request was redirected into
1554 * Privoxy without the client's knowledge,
1555 * the request line lacks the destination host.
1557 * This function tries to get it elsewhere,
1558 * provided accept-intercepted-requests is enabled.
1560 * "Elsewhere" currently only means "Host: header",
1561 * but in the future we may ask the redirecting
1562 * packet filter to look the destination up.
1564 * If the destination stays unknown, an error
1565 * response is send to the client and headers
1566 * are freed so that chat() can return directly.
1569 * 1 : csp = Current client state (buffers, headers, etc...)
1570 * 2 : headers = a header list
1572 * Returns : JB_ERR_OK if the destination is now known, or
1573 * JB_ERR_PARSE if it isn't.
1575 *********************************************************************/
1576 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1580 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1582 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1583 " Privoxy isn't configured to accept intercepted requests.",
1584 csp->ip_addr_str, csp->http->cmd);
1585 /* XXX: Use correct size */
1586 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1587 csp->ip_addr_str, csp->http->cmd);
1589 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1590 destroy_list(headers);
1592 return JB_ERR_PARSE;
1594 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1596 /* Split the domain we just got for pattern matching */
1597 init_domain_components(csp->http);
1603 /* We can't work without destination. Go spread the news.*/
1605 req = list_to_text(headers);
1607 /* XXX: Use correct size */
1608 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1609 csp->ip_addr_str, csp->http->cmd);
1610 log_error(LOG_LEVEL_ERROR,
1611 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1612 csp->ip_addr_str, csp->http->cmd, req);
1615 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
1616 destroy_list(headers);
1618 return JB_ERR_PARSE;
1621 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1622 * to get the destination IP address, use it as host directly
1623 * or do a reverse DNS lookup first.
1628 /*********************************************************************
1630 * Function : get_server_headers
1632 * Description : Parses server headers in iob and fills them
1633 * into csp->headers so that they can later be
1637 * 1 : csp = Current client state (buffers, headers, etc...)
1639 * Returns : JB_ERR_OK if everything went fine, or
1640 * JB_ERR_PARSE if the headers were incomplete.
1642 *********************************************************************/
1643 static jb_err get_server_headers(struct client_state *csp)
1645 int continue_hack_in_da_house = 0;
1648 while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
1653 * continue hack in da house. Ignore the ending of
1654 * this head and continue enlisting header lines.
1655 * The reason is described below.
1657 enlist(csp->headers, "");
1658 continue_hack_in_da_house = 0;
1661 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1664 * It's a bodyless continue response, don't
1665 * stop header parsing after reaching its end.
1667 * As a result Privoxy will concatenate the
1668 * next response's head and parse and deliver
1669 * the headers as if they belonged to one request.
1671 * The client will separate them because of the
1672 * empty line between them.
1674 * XXX: What we're doing here is clearly against
1675 * the intended purpose of the continue header,
1676 * and under some conditions (HTTP/1.0 client request)
1677 * it's a standard violation.
1679 * Anyway, "sort of against the spec" is preferable
1680 * to "always getting confused by Continue responses"
1681 * (Privoxy's behaviour before this hack was added)
1683 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1684 continue_hack_in_da_house = 1;
1686 else if (*header == '\0')
1689 * If the header is empty, but the Continue hack
1690 * isn't active, we can assume that we reached the
1691 * end of the buffer before we hit the end of the
1694 * Inform the caller an let it decide how to handle it.
1696 return JB_ERR_PARSE;
1699 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1702 * XXX: Should we quit the request and return a
1703 * out of memory error page instead?
1705 log_error(LOG_LEVEL_ERROR,
1706 "Out of memory while enlisting server headers. %s lost.",
1716 /*********************************************************************
1718 * Function : crunch_reason
1720 * Description : Translates the crunch reason code into a string.
1723 * 1 : rsp = a http_response
1725 * Returns : A string with the crunch reason or an error description.
1727 *********************************************************************/
1728 static const char *crunch_reason(const struct http_response *rsp)
1730 char * reason = NULL;
1732 assert(rsp != NULL);
1735 return "Internal error while searching for crunch reason";
1738 switch (rsp->reason)
1740 case RSP_REASON_UNSUPPORTED:
1741 reason = "Unsupported HTTP feature";
1743 case RSP_REASON_BLOCKED:
1746 case RSP_REASON_UNTRUSTED:
1747 reason = "Untrusted";
1749 case RSP_REASON_REDIRECTED:
1750 reason = "Redirected";
1752 case RSP_REASON_CGI_CALL:
1753 reason = "CGI Call";
1755 case RSP_REASON_NO_SUCH_DOMAIN:
1756 reason = "DNS failure";
1758 case RSP_REASON_FORWARDING_FAILED:
1759 reason = "Forwarding failed";
1761 case RSP_REASON_CONNECT_FAILED:
1762 reason = "Connection failure";
1764 case RSP_REASON_OUT_OF_MEMORY:
1765 reason = "Out of memory (may mask other reasons)";
1768 reason = "No reason recorded";
1776 /*********************************************************************
1778 * Function : send_crunch_response
1780 * Description : Delivers already prepared response for
1781 * intercepted requests, logs the interception
1782 * and frees the response.
1785 * 1 : csp = Current client state (buffers, headers, etc...)
1786 * 1 : rsp = Fully prepared response. Will be freed on exit.
1788 * Returns : Nothing.
1790 *********************************************************************/
1791 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp)
1793 const struct http_request *http = csp->http;
1794 char status_code[4];
1796 assert(rsp != NULL);
1797 assert(rsp->head != NULL);
1802 * Not supposed to happen. If it does
1803 * anyway, treat it as an unknown error.
1805 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1806 /* return code doesn't matter */
1811 /* If rsp is still NULL, we have serious internal problems. */
1812 log_error(LOG_LEVEL_FATAL,
1813 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1817 * Extract the status code from the actual head
1818 * that was send to the client. It is the only
1819 * way to get it right for all requests, including
1820 * the fixed ones for out-of-memory problems.
1822 * A head starts like this: 'HTTP/1.1 200...'
1826 status_code[0] = rsp->head[9];
1827 status_code[1] = rsp->head[10];
1828 status_code[2] = rsp->head[11];
1829 status_code[3] = '\0';
1831 /* Write the answer to the client */
1832 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1833 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1835 /* There is nothing we can do about it. */
1836 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1839 /* Log that the request was crunched and why. */
1840 log_error(LOG_LEVEL_CRUNCH, "%s: %s", crunch_reason(rsp), http->url);
1841 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %d",
1842 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1844 /* Clean up and return */
1845 if (cgi_error_memory() != rsp)
1847 free_http_response(rsp);
1854 /*********************************************************************
1856 * Function : request_contains_null_bytes
1858 * Description : Checks for NULL bytes in the request and sends
1859 * an error message to the client if any were found.
1861 * XXX: currently not used, see comment in chat().
1864 * 1 : csp = Current client state (buffers, headers, etc...)
1865 * 2 : buf = Data from the client's request to check.
1866 * 3 : len = The data length.
1868 * Returns : TRUE if the request contained one or more NULL bytes, or
1871 *********************************************************************/
1872 static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1874 size_t c_len; /* Request lenght when treated as C string */
1876 c_len = strlen(buf);
1881 * Null byte(s) found. Log the request,
1882 * return an error response and hang up.
1884 size_t tmp_len = c_len;
1889 * Replace NULL byte(s) with '°' characters
1890 * so the request can be logged as string.
1891 * XXX: Is there a better replacement character?
1894 tmp_len += strlen(buf+tmp_len);
1895 } while (tmp_len < len);
1897 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1898 "(length=%d, strlen=%d).", csp->ip_addr_str, len, c_len);
1899 log_error(LOG_LEVEL_HEADER,
1900 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1902 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
1904 /* XXX: Log correct size */
1905 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1915 /*********************************************************************
1917 * Function : crunch_response_triggered
1919 * Description : Checks if the request has to be crunched,
1920 * and delivers the crunch response if necessary.
1923 * 1 : csp = Current client state (buffers, headers, etc...)
1924 * 2 : crunchers = list of cruncher functions to run
1926 * Returns : TRUE if the request was answered with a crunch response
1929 *********************************************************************/
1930 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
1932 struct http_response *rsp = NULL;
1933 const struct cruncher *c;
1936 * If CGI request crunching is disabled,
1937 * check the CGI dispatcher out of order to
1938 * prevent unintentional blocks or redirects.
1940 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
1941 && (NULL != (rsp = dispatch_cgi(csp))))
1943 /* Deliver, log and free the interception response. */
1944 send_crunch_response(csp, rsp);
1948 for (c = crunchers; c->cruncher != NULL; c++)
1951 * Check the cruncher if either Privoxy is toggled
1952 * on and the request isn't forced, or if the cruncher
1953 * applies to forced requests as well.
1955 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
1956 !(csp->flags & CSP_FLAG_FORCED)) ||
1957 (c->flags & CF_IGNORE_FORCE))
1959 rsp = c->cruncher(csp);
1962 /* Deliver, log and free the interception response. */
1963 send_crunch_response(csp, rsp);
1964 #ifdef FEATURE_STATISTICS
1965 if (c->flags & CF_COUNT_AS_REJECT)
1967 csp->flags |= CSP_FLAG_REJECTED;
1969 #endif /* def FEATURE_STATISTICS */
1980 /*********************************************************************
1982 * Function : build_request_line
1984 * Description : Builds the HTTP request line.
1986 * If a HTTP forwarder is used it expects the whole URL,
1987 * web servers only get the path.
1990 * 1 : csp = Current client state (buffers, headers, etc...)
1991 * 2 : fwd = The forwarding spec used for the request
1992 * XXX: Should use http->fwd instead.
1993 * 3 : request_line = The old request line which will be replaced.
1995 * Returns : Nothing. Terminates in case of memory problems.
1997 *********************************************************************/
1998 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
2000 struct http_request *http = csp->http;
2002 assert(http->ssl == 0);
2005 * Downgrade http version from 1.1 to 1.0
2006 * if +downgrade action applies.
2008 if ( (csp->action->flags & ACTION_DOWNGRADE)
2009 && (!strcmpic(http->ver, "HTTP/1.1")))
2012 http->ver = strdup("HTTP/1.0");
2014 if (http->ver == NULL)
2016 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
2021 * Rebuild the request line.
2023 freez(*request_line);
2024 *request_line = strdup(http->gpc);
2025 string_append(request_line, " ");
2027 if (fwd->forward_host)
2029 string_append(request_line, http->url);
2033 string_append(request_line, http->path);
2035 string_append(request_line, " ");
2036 string_append(request_line, http->ver);
2038 if (*request_line == NULL)
2040 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
2042 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
2046 /*********************************************************************
2048 * Function : change_request_destination
2050 * Description : Parse a (rewritten) request line and regenerate
2051 * the http request data.
2054 * 1 : csp = Current client state (buffers, headers, etc...)
2056 * Returns : Forwards the parse_http_request() return code.
2057 * Terminates in case of memory problems.
2059 *********************************************************************/
2060 static jb_err change_request_destination(struct client_state *csp)
2062 struct http_request *http = csp->http;
2065 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
2066 free_http_request(http);
2067 err = parse_http_request(csp->headers->first->str, http, csp);
2068 if (JB_ERR_OK != err)
2070 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
2071 jb_err_to_string(err));
2075 /* XXX: ocmd is a misleading name */
2076 http->ocmd = strdup(http->cmd);
2077 if (http->ocmd == NULL)
2079 log_error(LOG_LEVEL_FATAL,
2080 "Out of memory copying rewritten HTTP request line");
2088 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2089 /*********************************************************************
2091 * Function : server_response_is_complete
2093 * Description : Determines whether we should stop reading
2094 * from the server socket.
2097 * 1 : csp = Current client state (buffers, headers, etc...)
2098 * 2 : content_length = Length of content received so far.
2100 * Returns : TRUE if the response is complete,
2103 *********************************************************************/
2104 static int server_response_is_complete(struct client_state *csp, size_t content_length)
2106 int content_length_known = (csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
2108 if (!strcmpic(csp->http->gpc, "HEAD"))
2111 * "HEAD" implies no body, we are thus expecting
2112 * no content. XXX: incomplete "list" of methods?
2114 csp->expected_content_length = 0;
2115 content_length_known = TRUE;
2118 if (csp->http->status == 304)
2121 * Expect no body. XXX: incomplete "list" of status codes?
2123 csp->expected_content_length = 0;
2124 content_length_known = TRUE;
2127 return (content_length_known && ((0 == csp->expected_content_length)
2128 || (csp->expected_content_length <= content_length)));
2130 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2132 /*********************************************************************
2134 * Function : mark_server_socket_tainted
2136 * Description : Makes sure we don't reuse a server socket
2137 * (if we didn't read everything the server sent
2138 * us reusing the socket would lead to garbage).
2141 * 1 : csp = Current client state (buffers, headers, etc...)
2145 *********************************************************************/
2146 static void mark_server_socket_tainted(struct client_state *csp)
2148 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
2150 log_error(LOG_LEVEL_CONNECT, "Unsetting keep-alive flag.");
2151 csp->flags &= ~CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE;
2155 /*********************************************************************
2157 * Function : get_request_line
2159 * Description : Read the client request line.
2162 * 1 : csp = Current client state (buffers, headers, etc...)
2164 * Returns : Pointer to request line or NULL in case of errors.
2166 *********************************************************************/
2167 static char *get_request_line(struct client_state *csp)
2169 char buf[BUFFER_SIZE];
2170 char *request_line = NULL;
2173 memset(buf, 0, sizeof(buf));
2177 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
2179 log_error(LOG_LEVEL_ERROR,
2180 "Stopped waiting for the request line.");
2184 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2186 if (len <= 0) return NULL;
2189 * If there is no memory left for buffering the
2190 * request, there is nothing we can do but hang up
2192 if (add_to_iob(csp, buf, len))
2197 request_line = get_header(csp->iob);
2199 } while ((NULL != request_line) && ('\0' == *request_line));
2201 return request_line;
2206 /*********************************************************************
2208 * Function : receive_client_request
2210 * Description : Read the client's request (more precisely the
2211 * client headers) and answer it if necessary.
2213 * Note that since we're not using select() we could get
2214 * blocked here if a client connected, then didn't say
2218 * 1 : csp = Current client state (buffers, headers, etc...)
2220 * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
2222 *********************************************************************/
2223 static jb_err receive_client_request(struct client_state *csp)
2225 char buf[BUFFER_SIZE];
2228 struct http_request *http;
2232 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
2233 struct list header_list;
2234 struct list *headers = &header_list;
2238 memset(buf, 0, sizeof(buf));
2240 req = get_request_line(csp);
2242 if ((NULL != req) && ('\0' != *req))
2244 /* Request received. Validate and parse it. */
2246 /* Does the request line look invalid? */
2247 if (client_protocol_is_unsupported(csp, req))
2250 * Yes. The request has already been
2251 * answered with a error response, the buffers
2252 * were freed and we're done with chatting.
2254 return JB_ERR_PARSE;
2257 #ifdef FEATURE_FORCE_LOAD
2259 * If this request contains the FORCE_PREFIX and blocks
2260 * aren't enforced, get rid of it and set the force flag.
2262 if (strstr(req, FORCE_PREFIX))
2264 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
2266 log_error(LOG_LEVEL_FORCE,
2267 "Ignored force prefix in request: \"%s\".", req);
2271 strclean(req, FORCE_PREFIX);
2272 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
2273 csp->flags |= CSP_FLAG_FORCED;
2276 #endif /* def FEATURE_FORCE_LOAD */
2278 err = parse_http_request(req, http, csp);
2279 if (JB_ERR_OK != err)
2281 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", jb_err_to_string(err));
2287 if (http->cmd == NULL)
2289 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
2290 /* XXX: Use correct size */
2291 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2292 log_error(LOG_LEVEL_ERROR, "Invalid header received from %s.", csp->ip_addr_str);
2294 free_http_request(http);
2295 return JB_ERR_PARSE;
2298 /* grab the rest of the client's headers */
2302 p = get_header(csp->iob);
2306 /* There are no additional headers to read. */
2313 * We didn't receive a complete header
2314 * line yet, get the rest of it.
2316 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
2318 log_error(LOG_LEVEL_ERROR,
2319 "Stopped grabbing the client headers.");
2320 return JB_ERR_PARSE;
2323 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2326 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
2327 destroy_list(headers);
2328 return JB_ERR_PARSE;
2331 if (add_to_iob(csp, buf, len))
2334 * If there is no memory left for buffering the
2335 * request, there is nothing we can do but hang up
2337 destroy_list(headers);
2338 return JB_ERR_MEMORY;
2344 * We were able to read a complete
2345 * header and can finaly enlist it.
2352 if (http->host == NULL)
2355 * If we still don't know the request destination,
2356 * the request is invalid or the client uses
2357 * Privoxy without its knowledge.
2359 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
2362 * Our attempts to get the request destination
2363 * elsewhere failed or Privoxy is configured
2364 * to only accept proxy requests.
2366 * An error response has already been send
2367 * and we're done here.
2369 return JB_ERR_PARSE;
2374 * Determine the actions for this URL
2376 #ifdef FEATURE_TOGGLE
2377 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
2379 /* Most compatible set of actions (i.e. none) */
2380 init_current_action(csp->action);
2383 #endif /* ndef FEATURE_TOGGLE */
2385 get_url_actions(csp, http);
2389 * Save a copy of the original request for logging
2391 http->ocmd = strdup(http->cmd);
2392 if (http->ocmd == NULL)
2394 log_error(LOG_LEVEL_FATAL,
2395 "Out of memory copying HTTP request line");
2397 enlist(csp->headers, http->cmd);
2399 /* Append the previously read headers */
2400 list_append_list_unique(csp->headers, headers);
2401 destroy_list(headers);
2408 /*********************************************************************
2410 * Function : parse_client_request
2412 * Description : Parses the client's request and decides what to do
2415 * Note that since we're not using select() we could get
2416 * blocked here if a client connected, then didn't say
2420 * 1 : csp = Current client state (buffers, headers, etc...)
2422 * Returns : JB_ERR_OK or JB_ERR_PARSE
2424 *********************************************************************/
2425 static jb_err parse_client_request(struct client_state *csp)
2427 struct http_request *http = csp->http;
2430 err = sed(csp, FILTER_CLIENT_HEADERS);
2431 if (JB_ERR_OK != err)
2433 /* XXX: Should be handled in sed(). */
2434 assert(err == JB_ERR_PARSE);
2435 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers.");
2437 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2439 /* Check request line for rewrites. */
2440 if ((NULL == csp->headers->first->str)
2441 || (strcmp(http->cmd, csp->headers->first->str) &&
2442 (JB_ERR_OK != change_request_destination(csp))))
2445 * A header filter broke the request line - bail out.
2447 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
2448 /* XXX: Use correct size */
2449 log_error(LOG_LEVEL_CLF,
2450 "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
2451 log_error(LOG_LEVEL_ERROR,
2452 "Invalid request line after applying header filters.");
2453 free_http_request(http);
2455 return JB_ERR_PARSE;
2463 /*********************************************************************
2467 * Description : Once a connection to the client has been accepted,
2468 * this function is called (via serve()) to handle the
2469 * main business of the communication. When this
2470 * function returns, the caller must close the client
2473 * FIXME: chat is nearly thousand lines long.
2477 * 1 : csp = Current client state (buffers, headers, etc...)
2479 * Returns : Nothing.
2481 *********************************************************************/
2482 static void chat(struct client_state *csp)
2484 char buf[BUFFER_SIZE];
2491 int ms_iis5_hack = 0;
2492 size_t byte_count = 0;
2493 int forwarded_connect_retries = 0;
2494 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
2495 const struct forward_spec *fwd;
2496 struct http_request *http;
2497 int len = 0; /* for buffer sizes (and negative error codes) */
2499 /* Function that does the content filtering for the current request */
2500 filter_function_ptr content_filter = NULL;
2502 /* Skeleton for HTTP response, if we should intercept the request */
2503 struct http_response *rsp;
2504 struct timeval timeout;
2506 memset(buf, 0, sizeof(buf));
2507 memset(&timeout, 0, sizeof(timeout));
2508 timeout.tv_sec = csp->config->socket_timeout;
2512 if (receive_client_request(csp) != JB_ERR_OK)
2516 if (parse_client_request(csp) != JB_ERR_OK)
2521 /* decide how to route the HTTP request */
2522 fwd = forward_url(csp, http);
2525 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
2526 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2530 * build the http request to send to the server
2531 * we have to do one of the following:
2533 * create = use the original HTTP request to create a new
2534 * HTTP request that has either the path component
2535 * without the http://domainspec (w/path) or the
2536 * full orininal URL (w/url)
2537 * Note that the path and/or the HTTP version may
2538 * have been altered by now.
2540 * connect = Open a socket to the host:port of the server
2541 * and short-circuit server and client socket.
2543 * pass = Pass the request unchanged if forwarding a CONNECT
2544 * request to a parent proxy. Note that we'll be sending
2545 * the CFAIL message ourselves if connecting to the parent
2546 * fails, but we won't send a CSUCCEED message if it works,
2547 * since that would result in a double message (ours and the
2548 * parent's). After sending the request to the parent, we simply
2551 * here's the matrix:
2554 * +--------+--------+
2556 * 0 | create | connect|
2558 * Forwarding +--------+--------+
2560 * 1 | create | pass |
2562 * +--------+--------+
2566 if (http->ssl && connect_port_is_forbidden(csp))
2568 const char *acceptable_connect_ports =
2569 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
2570 assert(NULL != acceptable_connect_ports);
2571 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
2572 "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
2573 csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
2574 csp->action->flags |= ACTION_BLOCK;
2580 freez(csp->headers->first->str);
2581 build_request_line(csp, fwd, &csp->headers->first->str);
2585 * We have a request. Check if one of the crunchers wants it.
2587 if (crunch_response_triggered(csp, crunchers_all))
2590 * Yes. The client got the crunch response
2591 * and we are done here after cleaning up.
2593 /* XXX: why list_remove_all()? */
2594 list_remove_all(csp->headers);
2599 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2601 if (fwd->forward_host)
2603 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2604 fwd->forward_host, fwd->forward_port, http->hostport);
2608 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2611 /* here we connect to the server, gateway, or the forwarder */
2613 while ((csp->sfd = forwarded_connect(fwd, http, csp))
2614 && (errno == EINVAL)
2615 && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2617 log_error(LOG_LEVEL_ERROR,
2618 "failed request #%u to connect to %s. Trying again.",
2619 forwarded_connect_retries, http->hostport);
2622 if (csp->sfd == JB_INVALID_SOCKET)
2624 if (fwd->type != SOCKS_NONE)
2627 rsp = error_response(csp, "forwarding-failed", errno);
2629 else if (errno == EINVAL)
2631 rsp = error_response(csp, "no-such-domain", errno);
2635 rsp = error_response(csp, "connect-failed", errno);
2636 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2640 /* Write the answer to the client */
2643 send_crunch_response(csp, rsp);
2649 hdr = list_to_text(csp->headers);
2652 /* FIXME Should handle error properly */
2653 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2655 list_remove_all(csp->headers);
2657 if (fwd->forward_host || (http->ssl == 0))
2660 * Write the client's (modified) header to the server
2661 * (along with anything else that may be in the buffer)
2663 if (write_socket(csp->sfd, hdr, strlen(hdr))
2664 || (flush_socket(csp->sfd, csp->iob) < 0))
2666 log_error(LOG_LEVEL_CONNECT,
2667 "write header to: %s failed: %E", http->hostport);
2669 rsp = error_response(csp, "connect-failed", errno);
2672 send_crunch_response(csp, rsp);
2682 * We're running an SSL tunnel and we're not forwarding,
2683 * so just send the "connect succeeded" message to the
2684 * client, flush the rest, and get out of the way.
2686 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
2694 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2696 /* we're finished with the client's header */
2699 maxfd = (csp->cfd > csp->sfd) ? csp->cfd : csp->sfd;
2701 /* pass data between the client and server
2702 * until one or the other shuts down the connection.
2711 * FD_ZERO here seems to point to an errant macro which crashes.
2712 * So do this by hand for now...
2714 memset(&rfds,0x00,sizeof(fd_set));
2718 FD_SET(csp->cfd, &rfds);
2719 FD_SET(csp->sfd, &rfds);
2721 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2722 if ((csp->flags & CSP_FLAG_CHUNKED)
2723 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
2724 && ((csp->iob->eod - csp->iob->cur) >= 5)
2725 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
2727 log_error(LOG_LEVEL_CONNECT,
2728 "Looks like we read the last chunk together with "
2729 "the server headers. We better stop reading.");
2730 byte_count = (size_t)(csp->iob->eod - csp->iob->cur);
2731 csp->expected_content_length = byte_count;
2732 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2734 if (server_body && server_response_is_complete(csp, byte_count))
2736 log_error(LOG_LEVEL_CONNECT,
2737 "Done reading from server. Expected content length: %d. "
2738 "Actual content length: %d. Most recently received: %d.",
2739 csp->expected_content_length, byte_count, len);
2742 * XXX: should not jump around,
2743 * chat() is complicated enough already.
2747 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2749 n = select((int)maxfd+1, &rfds, NULL, NULL, &timeout);
2753 log_error(LOG_LEVEL_ERROR, "Didn't receive data in time.");
2754 mark_server_socket_tainted(csp);
2759 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2760 mark_server_socket_tainted(csp);
2765 * This is the body of the browser's request,
2766 * just read and write it.
2768 if (FD_ISSET(csp->cfd, &rfds))
2770 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2774 /* XXX: not sure if this is necessary. */
2775 mark_server_socket_tainted(csp);
2776 break; /* "game over, man" */
2779 if (write_socket(csp->sfd, buf, (size_t)len))
2781 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2782 mark_server_socket_tainted(csp);
2789 * The server wants to talk. It could be the header or the body.
2790 * If `hdr' is null, then it's the header otherwise it's the body.
2791 * FIXME: Does `hdr' really mean `host'? No.
2793 if (FD_ISSET(csp->sfd, &rfds))
2796 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2800 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2802 if (http->ssl && (fwd->forward_host == NULL))
2805 * Just hang up. We already confirmed the client's CONNECT
2806 * request with status code 200 and unencrypted content is
2807 * no longer welcome.
2809 log_error(LOG_LEVEL_ERROR,
2810 "CONNECT already confirmed. Unable to tell the client about the problem.");
2813 else if (byte_count)
2816 * Just hang up. We already transmitted the original headers
2817 * and parts of the original content and therefore missed the
2818 * chance to send an error message (without risking data corruption).
2820 * XXX: we could retry with a fancy range request here.
2822 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2823 "Unable to tell the client about the problem.");
2824 mark_server_socket_tainted(csp);
2828 rsp = error_response(csp, "connect-failed", errno);
2831 send_crunch_response(csp, rsp);
2837 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2838 if (csp->flags & CSP_FLAG_CHUNKED)
2840 if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2842 /* XXX: this is a temporary hack */
2843 log_error(LOG_LEVEL_CONNECT,
2844 "Looks like we reached the end of the last chunk. "
2845 "We better stop reading.");
2846 csp->expected_content_length = byte_count + (size_t)len;
2847 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2851 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2854 * Add a trailing zero to let be able to use string operations.
2855 * XXX: do we still need this with filter_popups gone?
2860 * Normally, this would indicate that we've read
2861 * as much as the server has sent us and we can
2862 * close the client connection. However, Microsoft
2863 * in its wisdom has released IIS/5 with a bug that
2864 * prevents it from sending the trailing \r\n in
2865 * a 302 redirect header (and possibly other headers).
2866 * To work around this if we've haven't parsed
2867 * a full header we'll append a trailing \r\n
2868 * and see if this now generates a valid one.
2870 * This hack shouldn't have any impacts. If we've
2871 * already transmitted the header or if this is a
2872 * SSL connection, then we won't bother with this
2873 * hack. So we only work on partially received
2874 * headers. If we append a \r\n and this still
2875 * doesn't generate a valid header, then we won't
2876 * transmit anything to the client.
2881 if (server_body || http->ssl)
2884 * If we have been buffering up the document,
2885 * now is the time to apply content modification
2886 * and send the result to the client.
2890 p = execute_content_filter(csp, content_filter);
2892 * If the content filter fails, use the original
2893 * buffer and length.
2894 * (see p != NULL ? p : csp->iob->cur below)
2898 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2901 if (JB_ERR_OK != update_server_headers(csp))
2903 log_error(LOG_LEVEL_FATAL,
2904 "Failed to update server headers. after filtering.");
2907 hdr = list_to_text(csp->headers);
2910 /* FIXME Should handle error properly */
2911 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2914 if (write_socket(csp->cfd, hdr, strlen(hdr))
2915 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
2917 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2920 mark_server_socket_tainted(csp);
2928 break; /* "game over, man" */
2932 * This is NOT the body, so
2933 * Let's pretend the server just sent us a blank line.
2935 snprintf(buf, sizeof(buf), "\r\n");
2936 len = (int)strlen(buf);
2939 * Now, let the normal header parsing algorithm below do its
2940 * job. If it fails, we'll exit instead of continuing.
2947 * If this is an SSL connection or we're in the body
2948 * of the server document, just write it to the client,
2949 * unless we need to buffer the body for later content-filtering
2951 if (server_body || http->ssl)
2956 * If there is no memory left for buffering the content, or the buffer limit
2957 * has been reached, switch to non-filtering mode, i.e. make & write the
2958 * header, flush the iob and buf, and get out of the way.
2960 if (add_to_iob(csp, buf, len))
2965 log_error(LOG_LEVEL_INFO,
2966 "Flushing header and buffers. Stepping back from filtering.");
2968 hdr = list_to_text(csp->headers);
2972 * Memory is too tight to even generate the header.
2973 * Send our static "Out-of-memory" page.
2975 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2976 rsp = cgi_error_memory();
2977 send_crunch_response(csp, rsp);
2978 mark_server_socket_tainted(csp);
2981 hdrlen = strlen(hdr);
2983 if (write_socket(csp->cfd, hdr, hdrlen)
2984 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
2985 || (write_socket(csp->cfd, buf, (size_t)len)))
2987 log_error(LOG_LEVEL_CONNECT,
2988 "Flush header and buffers to client failed: %E");
2990 mark_server_socket_tainted(csp);
2995 * Reset the byte_count to the amount of bytes
2996 * we just flushed. len will be added a few lines below,
2997 * hdrlen doesn't matter for LOG_LEVEL_CLF.
2999 byte_count = (size_t)flushed;
3001 content_filter = NULL;
3007 if (write_socket(csp->cfd, buf, (size_t)len))
3009 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
3010 mark_server_socket_tainted(csp);
3014 byte_count += (size_t)len;
3019 const char *header_start;
3021 * We're still looking for the end of the server's header.
3022 * Buffer up the data we just read. If that fails, there's
3023 * little we can do but send our static out-of-memory page.
3025 if (add_to_iob(csp, buf, len))
3027 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
3028 rsp = cgi_error_memory();
3029 send_crunch_response(csp, rsp);
3030 mark_server_socket_tainted(csp);
3034 header_start = csp->iob->cur;
3036 /* Convert iob into something sed() can digest */
3037 if (JB_ERR_PARSE == get_server_headers(csp))
3042 * Well, we tried our MS IIS/5 hack and it didn't work.
3043 * The header is incomplete and there isn't anything
3044 * we can do about it.
3046 log_error(LOG_LEVEL_INFO,
3047 "MS IIS5 hack didn't produce valid headers.");
3053 * Since we have to wait for more from the server before
3054 * we can parse the headers we just continue here.
3056 int header_offset = csp->iob->cur - header_start;
3057 assert(csp->iob->cur >= header_start);
3058 byte_count += (size_t)(len - header_offset);
3059 log_error(LOG_LEVEL_CONNECT, "Continuing buffering headers. "
3060 "byte_count: %d. header_offset: %d. len: %d.",
3061 byte_count, header_offset, len);
3066 /* Did we actually get anything? */
3067 if (NULL == csp->headers->first)
3069 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
3070 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3071 write_socket(csp->cfd, NO_SERVER_DATA_RESPONSE, strlen(NO_SERVER_DATA_RESPONSE));
3072 free_http_request(http);
3073 mark_server_socket_tainted(csp);
3077 assert(csp->headers->first->str);
3079 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
3080 strncmpic(csp->headers->first->str, "ICY", 3))
3083 * It doesn't look like a HTTP (or Shoutcast) response:
3084 * tell the client and log the problem.
3086 if (strlen(csp->headers->first->str) > 30)
3088 csp->headers->first->str[30] = '\0';
3090 log_error(LOG_LEVEL_ERROR,
3091 "Invalid server or forwarder response. Starts with: %s",
3092 csp->headers->first->str);
3093 log_error(LOG_LEVEL_CLF,
3094 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3095 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
3096 strlen(INVALID_SERVER_HEADERS_RESPONSE));
3097 free_http_request(http);
3098 mark_server_socket_tainted(csp);
3103 * We have now received the entire server header,
3104 * filter it and send the result to the client
3106 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
3108 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
3110 hdr = list_to_text(csp->headers);
3113 /* FIXME Should handle error properly */
3114 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3117 if (crunch_response_triggered(csp, crunchers_light))
3120 * One of the tags created by a server-header
3121 * tagger triggered a crunch. We already
3122 * delivered the crunch response to the client
3123 * and are done here after cleaning up.
3126 mark_server_socket_tainted(csp);
3129 /* Buffer and pcrs filter this if appropriate. */
3131 if (!http->ssl) /* We talk plaintext */
3133 content_filter = get_filter_function(csp);
3136 * Only write if we're not buffering for content modification
3138 if (!content_filter)
3141 * Write the server's (modified) header to
3142 * the client (along with anything else that
3143 * may be in the buffer)
3146 if (write_socket(csp->cfd, hdr, strlen(hdr))
3147 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
3149 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
3152 * The write failed, so don't bother mentioning it
3153 * to the client... it probably can't hear us anyway.
3156 mark_server_socket_tainted(csp);
3160 byte_count += (size_t)len;
3165 * XXX: the header lenght should probably
3166 * be calculated by get_server_headers().
3168 int header_length = csp->iob->cur - header_start;
3169 assert(csp->iob->cur > header_start);
3170 byte_count += (size_t)(len - header_length);
3173 /* we're finished with the server's header */
3179 * If this was a MS IIS/5 hack then it means the server
3180 * has already closed the connection. Nothing more to read.
3185 log_error(LOG_LEVEL_INFO,
3186 "Closed server connection detected with MS IIS5 hack enabled.");
3192 mark_server_socket_tainted(csp);
3193 return; /* huh? we should never get here */
3196 if (csp->content_length == 0)
3199 * If Privoxy didn't recalculate the Content-Lenght,
3200 * byte_count is still correct.
3202 csp->content_length = byte_count;
3205 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3206 && (csp->expected_content_length != byte_count))
3208 log_error(LOG_LEVEL_CONNECT,
3209 "Received %d bytes while expecting %d.",
3210 byte_count, csp->expected_content_length);
3211 mark_server_socket_tainted(csp);
3214 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
3215 csp->ip_addr_str, http->ocmd, csp->content_length);
3219 /*********************************************************************
3221 * Function : wait_for_alive_connections
3223 * Description : Waits for alive connections to timeout.
3229 *********************************************************************/
3230 static void wait_for_alive_connections()
3232 int connections_alive = close_unusable_connections();
3234 while (0 < connections_alive)
3236 log_error(LOG_LEVEL_CONNECT,
3237 "Waiting for %d connections to timeout.",
3240 connections_alive = close_unusable_connections();
3243 log_error(LOG_LEVEL_CONNECT, "No connections to wait for left.");
3247 /*********************************************************************
3251 * Description : This is little more than chat. We only "serve" to
3252 * to close any socket that chat may have opened.
3255 * 1 : csp = Current client state (buffers, headers, etc...)
3259 *********************************************************************/
3261 void serve(struct client_state *csp)
3262 #else /* ifndef AMIGA */
3263 static void serve(struct client_state *csp)
3264 #endif /* def AMIGA */
3267 close_socket(csp->cfd);
3269 if (csp->sfd != JB_INVALID_SOCKET)
3271 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3272 static int monitor_thread_running = 0;
3274 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
3275 && (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
3277 remember_connection(csp->sfd, csp->http, forward_url(csp, csp->http));
3278 privoxy_mutex_lock(&connection_reuse_mutex);
3279 if (!monitor_thread_running)
3281 monitor_thread_running = 1;
3282 privoxy_mutex_unlock(&connection_reuse_mutex);
3283 wait_for_alive_connections();
3284 privoxy_mutex_lock(&connection_reuse_mutex);
3285 monitor_thread_running = 0;
3287 privoxy_mutex_unlock(&connection_reuse_mutex);
3291 forget_connection(csp->sfd);
3292 close_socket(csp->sfd);
3295 close_socket(csp->sfd);
3296 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3299 csp->flags &= ~CSP_FLAG_ACTIVE;
3305 /*********************************************************************
3307 * Function : server_thread
3309 * Description : We only exist to call `serve' in a threaded environment.
3312 * 1 : data = Current client state (buffers, headers, etc...)
3314 * Returns : Always 0.
3316 *********************************************************************/
3317 static int32 server_thread(void *data)
3319 serve((struct client_state *) data);
3326 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3327 /*********************************************************************
3331 * Description : Print usage info & exit.
3333 * Parameters : Pointer to argv[0] for identifying ourselves
3337 *********************************************************************/
3338 static void usage(const char *myname)
3340 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
3344 #endif /* defined(unix) */
3347 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
3348 #endif /* defined(unix) */
3349 "[--version] [configfile]\n"
3350 "Aborting\n", myname);
3355 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
3358 #ifdef MUTEX_LOCKS_AVAILABLE
3359 /*********************************************************************
3361 * Function : privoxy_mutex_lock
3363 * Description : Locks a mutex.
3366 * 1 : mutex = The mutex to lock.
3368 * Returns : Void. May exit in case of errors.
3370 *********************************************************************/
3371 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
3373 #ifdef FEATURE_PTHREAD
3374 int err = pthread_mutex_lock(mutex);
3377 if (mutex != &log_mutex)
3379 log_error(LOG_LEVEL_FATAL,
3380 "Mutex locking failed: %s.\n", strerror(err));
3385 EnterCriticalSection(mutex);
3386 #endif /* def FEATURE_PTHREAD */
3390 /*********************************************************************
3392 * Function : privoxy_mutex_unlock
3394 * Description : Unlocks a mutex.
3397 * 1 : mutex = The mutex to unlock.
3399 * Returns : Void. May exit in case of errors.
3401 *********************************************************************/
3402 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
3404 #ifdef FEATURE_PTHREAD
3405 int err = pthread_mutex_unlock(mutex);
3408 if (mutex != &log_mutex)
3410 log_error(LOG_LEVEL_FATAL,
3411 "Mutex unlocking failed: %s.\n", strerror(err));
3416 LeaveCriticalSection(mutex);
3417 #endif /* def FEATURE_PTHREAD */
3421 /*********************************************************************
3423 * Function : privoxy_mutex_init
3425 * Description : Prepares a mutex.
3428 * 1 : mutex = The mutex to initialize.
3430 * Returns : Void. May exit in case of errors.
3432 *********************************************************************/
3433 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
3435 #ifdef FEATURE_PTHREAD
3436 int err = pthread_mutex_init(mutex, 0);
3439 printf("Fatal error. Mutex initialization failed: %s.\n",
3444 InitializeCriticalSection(mutex);
3445 #endif /* def FEATURE_PTHREAD */
3447 #endif /* def MUTEX_LOCKS_AVAILABLE */
3449 /*********************************************************************
3451 * Function : initialize_mutexes
3453 * Description : Prepares mutexes if mutex support is available.
3457 * Returns : Void, exits in case of errors.
3459 *********************************************************************/
3460 static void initialize_mutexes(void)
3462 #ifdef MUTEX_LOCKS_AVAILABLE
3464 * Prepare global mutex semaphores
3466 privoxy_mutex_init(&log_mutex);
3467 privoxy_mutex_init(&log_init_mutex);
3468 privoxy_mutex_init(&connection_reuse_mutex);
3471 * XXX: The assumptions below are a bit naive
3472 * and can cause locks that aren't necessary.
3474 * For example older FreeBSD versions (< 6.x?)
3475 * have no gethostbyname_r, but gethostbyname is
3478 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
3479 privoxy_mutex_init(&resolver_mutex);
3480 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
3482 * XXX: should we use a single mutex for
3483 * localtime() and gmtime() as well?
3485 #ifndef HAVE_GMTIME_R
3486 privoxy_mutex_init(&gmtime_mutex);
3487 #endif /* ndef HAVE_GMTIME_R */
3489 #ifndef HAVE_LOCALTIME_R
3490 privoxy_mutex_init(&localtime_mutex);
3491 #endif /* ndef HAVE_GMTIME_R */
3494 privoxy_mutex_init(&rand_mutex);
3495 #endif /* ndef HAVE_RANDOM */
3496 #endif /* def MUTEX_LOCKS_AVAILABLE */
3500 /*********************************************************************
3504 * Description : Load the config file and start the listen loop.
3505 * This function is a lot more *sane* with the `load_config'
3506 * and `listen_loop' functions; although it stills does
3507 * a *little* too much for my taste.
3510 * 1 : argc = Number of parameters (including $0).
3511 * 2 : argv = Array of (char *)'s to the parameters.
3513 * Returns : 1 if : can't open config file, unrecognized directive,
3514 * stats requested in multi-thread mode, can't open the
3515 * log file, can't open the jar file, listen port is invalid,
3516 * any load fails, and can't bind port.
3518 * Else main never returns, the process must be signaled
3519 * to terminate execution. Or, on Windows, use the
3520 * "File", "Exit" menu option.
3522 *********************************************************************/
3524 int real_main(int argc, const char *argv[])
3526 int main(int argc, const char *argv[])
3530 unsigned int random_seed;
3532 struct passwd *pw = NULL;
3533 struct group *grp = NULL;
3536 char *pre_chroot_nslookup_to_load_resolver = NULL;
3543 #if !defined(_WIN32)
3551 * Parse the command line arguments
3553 * XXX: simply printing usage information in case of
3554 * invalid arguments isn't particularly user friendly.
3556 while (++argc_pos < argc)
3559 /* Check to see if the service must be installed or uninstalled */
3560 if (strncmp(argv[argc_pos], "--install", 9) == 0)
3562 const char *pName = argv[argc_pos] + 9;
3565 exit( (install_service(pName)) ? 0 : 1 );
3567 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
3569 const char *pName = argv[argc_pos] + 11;
3572 exit((uninstall_service(pName)) ? 0 : 1);
3574 else if (strcmp(argv[argc_pos], "--service" ) == 0)
3576 bRunAsService = TRUE;
3577 w32_set_service_cwd();
3578 atexit(w32_service_exit_notify);
3581 #endif /* defined(_WIN32) */
3584 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3586 if (strcmp(argv[argc_pos], "--help") == 0)
3591 else if(strcmp(argv[argc_pos], "--version") == 0)
3593 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
3599 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
3604 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
3606 if (++argc_pos == argc) usage(argv[0]);
3607 pidfile = strdup(argv[argc_pos]);
3610 else if (strcmp(argv[argc_pos], "--user" ) == 0)
3612 if (++argc_pos == argc) usage(argv[argc_pos]);
3614 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
3617 if (NULL == (grp = getgrnam(p)))
3619 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
3623 if (NULL == (pw = getpwnam(argv[argc_pos])))
3625 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
3628 if (p != NULL) *--p = '\0';
3631 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
3633 if (++argc_pos == argc) usage(argv[0]);
3634 pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
3637 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
3641 #endif /* defined(unix) */
3643 else if (argc_pos + 1 != argc)
3646 * This is neither the last command line
3647 * option, nor was it recognized before,
3648 * therefore it must be invalid.
3654 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3656 configfile = argv[argc_pos];
3659 } /* -END- while (more arguments) */
3662 if ( *configfile != '/' )
3664 char cwd[BUFFER_SIZE];
3666 size_t abs_file_size;
3668 /* make config-filename absolute here */
3669 if (NULL == getcwd(cwd, sizeof(cwd)))
3671 perror("failed to get current working directory");
3676 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3677 basedir = strdup(cwd);
3679 if (NULL == basedir ||
3680 NULL == (abs_file = malloc(abs_file_size)))
3682 perror("malloc failed");
3685 strlcpy(abs_file, basedir, abs_file_size);
3686 strlcat(abs_file, "/", abs_file_size );
3687 strlcat(abs_file, configfile, abs_file_size);
3688 configfile = abs_file;
3690 #endif /* defined unix */
3694 clients->next = NULL;
3696 /* XXX: factor out initialising after the next stable release. */
3699 #elif defined(_WIN32)
3703 /* Prepare mutexes if supported and necessary. */
3704 initialize_mutexes();
3706 /* Enable logging until further notice. */
3707 init_log_module(Argv[0]);
3709 random_seed = (unsigned int)time(NULL);
3711 srandom(random_seed);
3714 #endif /* ifdef HAVE_RANDOM */
3717 * Unix signal handling
3719 * Catch the abort, interrupt and terminate signals for a graceful exit
3720 * Catch the hangup signal so the errlog can be reopened.
3721 * Ignore the broken pipe signals (FIXME: Why?)
3723 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3726 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3727 const int ignored_signals[] = { SIGPIPE, 0 };
3729 for (idx = 0; catched_signals[idx] != 0; idx++)
3731 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3732 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3734 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3735 #endif /* ifdef sun */
3737 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3741 for (idx = 0; ignored_signals[idx] != 0; idx++)
3743 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3745 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3750 #else /* ifdef _WIN32 */
3751 # ifdef _WIN_CONSOLE
3753 * We *are* in a windows console app.
3754 * Print a verbose messages about FAQ's and such
3756 printf("%s", win32_blurb);
3757 # endif /* def _WIN_CONSOLE */
3758 #endif /* def _WIN32 */
3761 /* Initialize the CGI subsystem */
3762 cgi_init_error_messages();
3765 * If runnig on unix and without the --nodaemon
3766 * option, become a daemon. I.e. fork, detach
3767 * from tty and get process group leadership
3780 if ( pid < 0 ) /* error */
3785 else if ( pid != 0 ) /* parent */
3790 * must check for errors
3791 * child died due to missing files aso
3794 wpid = waitpid( pid, &status, WNOHANG );
3803 /* Should be more portable, but not as well tested */
3808 #else /* ndef __FreeBSD__ */
3810 #endif /* ndef __FreeBSD__ */
3811 fd = open("/dev/tty", O_RDONLY);
3814 /* no error check here */
3815 ioctl( fd, TIOCNOTTY,0 );
3820 * stderr (fd 2) will be closed later on, when the
3821 * log file has been parsed.
3828 } /* -END- if (!no_daemon) */
3831 * As soon as we have written the PID file, we can switch
3832 * to the user and group ID indicated by the --user option
3838 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3840 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3846 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3848 /* Read the time zone file from /etc before doing chroot. */
3850 if (NULL != pre_chroot_nslookup_to_load_resolver
3851 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3853 /* Initialize resolver library. */
3854 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3856 if (chroot(pw->pw_dir) < 0)
3858 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3862 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3865 if (setuid(pw->pw_uid))
3867 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3871 char putenv_dummy[64];
3873 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3874 if (putenv(putenv_dummy) != 0)
3876 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3879 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3880 if (putenv(putenv_dummy) != 0)
3882 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3888 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3891 #endif /* defined unix */
3894 /* This will be FALSE unless the command line specified --service
3898 /* Yup, so now we must attempt to establish a connection
3899 * with the service dispatcher. This will only work if this
3900 * process was launched by the service control manager to
3901 * actually run as a service. If this isn't the case, i've
3902 * known it take around 30 seconds or so for the call to return.
3905 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3906 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3908 /* Service has run, and at this point is now being stopped, so just return */
3913 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3915 /* An error occurred. Usually it's because --service was wrongly specified
3916 * and we were unable to connect to the Service Control Dispatcher because
3917 * it wasn't expecting us and is therefore not listening.
3919 * For now, just continue below to call the listen_loop function.
3922 #endif /* def _WIN32 */
3932 /*********************************************************************
3934 * Function : bind_port_helper
3936 * Description : Bind the listen port. Handles logging, and aborts
3940 * 1 : config = Privoxy configuration. Specifies port
3943 * Returns : Port that was opened.
3945 *********************************************************************/
3946 static jb_socket bind_port_helper(struct configuration_spec * config)
3951 if (config->haddr == NULL)
3953 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3958 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3959 config->hport, config->haddr);
3962 result = bind_port(config->haddr, config->hport, &bfd);
3969 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3970 "There may be another Privoxy or some other "
3971 "proxy running on port %d",
3972 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
3973 config->hport, config->hport);
3976 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3977 "The hostname is not resolvable",
3978 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3981 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
3982 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3985 /* shouldn't get here */
3986 return JB_INVALID_SOCKET;
3989 config->need_bind = 0;
3996 /* Without this simple workaround we get this compiler warning from _beginthread
3997 * warning C4028: formal parameter 1 different from declaration
3999 void w32_service_listen_loop(void *p)
4003 #endif /* def _WIN32 */
4006 /*********************************************************************
4008 * Function : listen_loop
4010 * Description : bind the listen port and enter a "FOREVER" listening loop.
4016 *********************************************************************/
4017 static void listen_loop(void)
4019 struct client_state *csp = NULL;
4021 struct configuration_spec * config;
4023 config = load_config();
4025 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4027 * XXX: Should be relocated once it no
4028 * longer needs to emit log messages.
4030 initialize_reusable_connections();
4031 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4033 bfd = bind_port_helper(config);
4035 #ifdef FEATURE_GRACEFUL_TERMINATION
4036 while (!g_terminate)
4041 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
4042 while (waitpid(-1, NULL, WNOHANG) > 0)
4044 /* zombie children */
4046 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
4049 * Free data that was used by died threads
4055 * Re-open the errlog after HUP signal
4057 if (received_hup_signal)
4059 if (NULL != config->logfile)
4061 init_error_log(Argv[0], config->logfile);
4063 received_hup_signal = 0;
4067 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
4069 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
4073 csp->flags |= CSP_FLAG_ACTIVE;
4074 csp->sfd = JB_INVALID_SOCKET;
4076 csp->config = config = load_config();
4078 if ( config->need_bind )
4081 * Since we were listening to the "old port", we will not see
4082 * a "listen" param change until the next IJB request. So, at
4083 * least 1 more request must be made for us to find the new
4084 * setting. I am simply closing the old socket and binding the
4087 * Which-ever is correct, we will serve 1 more page via the
4088 * old settings. This should probably be a "show-proxy-args"
4089 * request. This should not be a so common of an operation
4090 * that this will hurt people's feelings.
4095 bfd = bind_port_helper(config);
4098 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
4100 if (!accept_connection(csp, bfd))
4102 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
4115 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
4118 #ifdef FEATURE_TOGGLE
4119 if (global_toggle_state)
4120 #endif /* def FEATURE_TOGGLE */
4122 csp->flags |= CSP_FLAG_TOGGLED_ON;
4125 if (run_loader(csp))
4127 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
4128 /* Never get here - LOG_LEVEL_FATAL causes program exit */
4132 if (block_acl(NULL,csp))
4134 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
4135 close_socket(csp->cfd);
4139 #endif /* def FEATURE_ACL */
4141 /* add it to the list of clients */
4142 csp->next = clients->next;
4143 clients->next = csp;
4145 if (config->multi_threaded)
4149 /* this is a switch () statment in the C preprocessor - ugh */
4150 #undef SELECTED_ONE_OPTION
4152 /* Use Pthreads in preference to native code */
4153 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
4154 #define SELECTED_ONE_OPTION
4156 pthread_t the_thread;
4157 pthread_attr_t attrs;
4159 pthread_attr_init(&attrs);
4160 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
4161 errno = pthread_create(&the_thread, &attrs,
4162 (void * (*)(void *))serve, csp);
4163 child_id = errno ? -1 : 0;
4164 pthread_attr_destroy(&attrs);
4168 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
4169 #define SELECTED_ONE_OPTION
4170 child_id = _beginthread(
4171 (void (*)(void *))serve,
4176 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
4177 #define SELECTED_ONE_OPTION
4178 child_id = _beginthread(
4179 (void(* _Optlink)(void*))serve,
4185 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
4186 #define SELECTED_ONE_OPTION
4188 thread_id tid = spawn_thread
4189 (server_thread, "server", B_NORMAL_PRIORITY, csp);
4191 if ((tid >= 0) && (resume_thread(tid) == B_OK))
4193 child_id = (int) tid;
4202 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
4203 #define SELECTED_ONE_OPTION
4204 csp->cfd = ReleaseSocket(csp->cfd, -1);
4207 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4208 NP_Output, Output(),
4209 NP_CloseOutput, FALSE,
4210 NP_Name, (ULONG)"privoxy child",
4214 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4215 NP_Output, Output(),
4216 NP_CloseOutput, FALSE,
4217 NP_Name, (ULONG)"privoxy child",
4218 NP_StackSize, 200*1024,
4224 ((struct Task *)child_id)->tc_UserData = csp;
4225 Signal((struct Task *)child_id, SIGF_SINGLE);
4230 #if !defined(SELECTED_ONE_OPTION)
4233 /* This block is only needed when using fork().
4234 * When using threads, the server thread was
4235 * created and run by the call to _beginthread().
4237 if (child_id == 0) /* child */
4240 #ifdef FEATURE_TOGGLE
4241 int inherited_toggle_state = global_toggle_state;
4242 #endif /* def FEATURE_TOGGLE */
4247 * If we've been toggled or we've blocked the request, tell Mom
4250 #ifdef FEATURE_TOGGLE
4251 if (inherited_toggle_state != global_toggle_state)
4253 rc |= RC_FLAG_TOGGLED;
4255 #endif /* def FEATURE_TOGGLE */
4257 #ifdef FEATURE_STATISTICS
4258 if (csp->flags & CSP_FLAG_REJECTED)
4260 rc |= RC_FLAG_BLOCKED;
4262 #endif /* ndef FEATURE_STATISTICS */
4266 else if (child_id > 0) /* parent */
4268 /* in a fork()'d environment, the parent's
4269 * copy of the client socket and the CSP
4273 #if !defined(_WIN32) && !defined(__CYGWIN__)
4275 wait( &child_status );
4278 * Evaluate child's return code: If the child has
4279 * - been toggled, toggle ourselves
4280 * - blocked its request, bump up the stats counter
4283 #ifdef FEATURE_TOGGLE
4284 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
4286 global_toggle_state = !global_toggle_state;
4288 #endif /* def FEATURE_TOGGLE */
4290 #ifdef FEATURE_STATISTICS
4292 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
4296 #endif /* def FEATURE_STATISTICS */
4298 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
4299 close_socket(csp->cfd);
4300 csp->flags &= ~CSP_FLAG_ACTIVE;
4304 #undef SELECTED_ONE_OPTION
4305 /* end of cpp switch () */
4307 if (child_id < 0) /* failed */
4309 char buf[BUFFER_SIZE];
4311 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
4313 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
4315 write_socket(csp->cfd, buf, strlen(buf));
4316 close_socket(csp->cfd);
4317 csp->flags &= ~CSP_FLAG_ACTIVE;
4328 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
4330 /* Clean up. Aim: free all memory (no leaks) */
4331 #ifdef FEATURE_GRACEFUL_TERMINATION
4333 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
4335 unload_current_config_file();
4336 unload_current_actions_file();
4337 unload_current_re_filterfile();
4338 #ifdef FEATURE_TRUST
4339 unload_current_trust_file();
4342 if (config->multi_threaded)
4349 } while ((clients->next != NULL) && (--i > 0));
4353 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
4364 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
4365 /* Cleanup - remove taskbar icon etc. */
4370 #endif /* FEATURE_GRACEFUL_TERMINATION */