1 const char jcc_rcs[] = "$Id: jcc.c,v 1.229 2009/03/07 11:17:01 fabiankeil Exp $";
2 /*********************************************************************
4 * File : $Source: /cvsroot/ijbswa/current/jcc.c,v $
6 * Purpose : Main file. Contains main() method, main loop, and
7 * the main connection-handling function.
9 * Copyright : Written by and Copyright (C) 2001-2009 the SourceForge
10 * Privoxy team. http://www.privoxy.org/
12 * Based on the Internet Junkbuster originally written
13 * by and Copyright (C) 1997 Anonymous Coders and
14 * Junkbusters Corporation. http://www.junkbusters.com
16 * This program is free software; you can redistribute it
17 * and/or modify it under the terms of the GNU General
18 * Public License as published by the Free Software
19 * Foundation; either version 2 of the License, or (at
20 * your option) any later version.
22 * This program is distributed in the hope that it will
23 * be useful, but WITHOUT ANY WARRANTY; without even the
24 * implied warranty of MERCHANTABILITY or FITNESS FOR A
25 * PARTICULAR PURPOSE. See the GNU General Public
26 * License for more details.
28 * The GNU General Public License should be included with
29 * this file. If not, you can view it at
30 * http://www.gnu.org/copyleft/gpl.html
31 * or write to the Free Software Foundation, Inc., 59
32 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
36 * Revision 1.229 2009/03/07 11:17:01 fabiankeil
37 * Fix compiler warning.
39 * Revision 1.228 2009/03/06 20:30:13 fabiankeil
40 * Log unsigned values as such.
42 * Revision 1.227 2009/03/02 19:18:11 fabiankeil
43 * Streamline parse_http_request()'s prototype. As
44 * cparser pointed out it doesn't actually use csp.
46 * Revision 1.226 2009/03/01 18:28:24 fabiankeil
47 * Help clang understand that we aren't dereferencing
50 * Revision 1.225 2009/02/19 18:09:32 fabiankeil
51 * Unbreak build without FEATURE_CONNECTION_KEEP_ALIVE.
54 * Revision 1.224 2009/02/14 15:32:04 fabiankeil
55 * Add the request URL to the timeout message in chat().
58 * Revision 1.223 2009/02/09 21:21:16 fabiankeil
59 * Now that init_log_module() is called earlier, call show_version()
60 * later on from main() directly so it doesn't get called for --help
63 * Revision 1.222 2009/02/08 12:56:51 fabiankeil
64 * Call initialize_mutexes() before init_log_module() again.
65 * Broken since r220, might be the cause of Lee's #2579448.
67 * Revision 1.221 2009/02/06 18:02:58 fabiankeil
68 * When dropping privileges, also give up membership in supplementary
69 * groups. Thanks to Matthias Drochner for reporting the problem,
70 * providing the initial patch and testing the final version.
72 * Revision 1.220 2009/02/04 18:29:07 fabiankeil
73 * Initialize the log module before parsing arguments.
74 * Thanks to Matthias Drochner for the report.
76 * Revision 1.219 2009/01/31 16:08:21 fabiankeil
77 * Remove redundant error check in receive_client_request().
79 * Revision 1.218 2009/01/31 12:25:54 fabiankeil
80 * Flatten indentation in receive_client_request().
82 * Revision 1.217 2009/01/07 19:50:09 fabiankeil
83 * - If the socket-timeout has been reached and the client
84 * hasn't received any data yet, send an explanation before
85 * closing the connection.
86 * - In get_request_line(), signal timeouts the right way.
88 * Revision 1.216 2008/12/24 22:13:11 ler762
89 * fix GCC 3.4.4 warning
91 * Revision 1.215 2008/12/24 17:06:19 fabiankeil
92 * Keep a thread around to timeout alive connections
93 * even if no new requests are coming in.
95 * Revision 1.214 2008/12/20 14:53:55 fabiankeil
96 * Add config option socket-timeout to control the time
97 * Privoxy waits for data to arrive on a socket. Useful
98 * in case of stale ssh tunnels or when fuzz-testing.
100 * Revision 1.213 2008/12/15 18:45:51 fabiankeil
101 * When logging crunches, log the whole URL, so one can easily
102 * differentiate between vanilla HTTP and CONNECT requests.
104 * Revision 1.212 2008/12/14 15:46:22 fabiankeil
105 * Give crunched requests their own log level.
107 * Revision 1.211 2008/12/06 10:05:03 fabiankeil
108 * Downgrade "Received x bytes while expecting y." message to
109 * LOG_LEVEL_CONNECT as it doesn't necessarily indicate an error.
111 * Revision 1.210 2008/12/02 22:03:18 fabiankeil
112 * Don't miscalculate byte_count if we don't get all the
113 * server headers with one read_socket() call. With keep-alive
114 * support enabled, this caused delays until the server closed
117 * Revision 1.209 2008/11/27 09:44:04 fabiankeil
118 * Cosmetics for the last commit: Don't watch out for
119 * the last chunk if the content isn't chunk-encoded or
120 * if we already determined the content length previously.
122 * Revision 1.208 2008/11/26 18:24:17 fabiankeil
123 * Recognize that the server response is complete if the
124 * last chunk is read together with the server headers.
127 * Revision 1.207 2008/11/25 17:25:16 fabiankeil
128 * Don't convert the client-header list to text until we need to.
130 * Revision 1.206 2008/11/23 17:00:11 fabiankeil
131 * Some more chat() cosmetics.
133 * Revision 1.205 2008/11/16 12:43:49 fabiankeil
134 * Turn keep-alive support into a runtime feature
135 * that is disabled by setting keep-alive-timeout
136 * to a negative value.
138 * Revision 1.204 2008/11/06 19:42:17 fabiankeil
139 * Fix last-chunk detection hack to also apply
140 * if buf[] contains nothing but the last-chunk.
142 * Revision 1.203 2008/11/06 18:34:35 fabiankeil
143 * Factor receive_client_request() and
144 * parse_client_request() out of chat().
146 * Revision 1.202 2008/11/02 18:40:34 fabiankeil
147 * If we received a different amount of data than we expected,
148 * log a warning and make sure the server socket isn't reused.
150 * Revision 1.201 2008/11/02 16:48:20 fabiankeil
151 * Revert revision 1.195 and try again.
153 * Revision 1.200 2008/10/26 16:53:18 fabiankeil
156 * Revision 1.199 2008/10/26 15:36:10 fabiankeil
157 * Remove two debug messages with LOG_LEVEL_INFO.
159 * Revision 1.198 2008/10/22 15:19:55 fabiankeil
160 * Once More, With Feeling: if there is no logfile
161 * because the user didn't specify one, we shouldn't
162 * call init_error_log() after receiving SIGHUP either.
164 * Revision 1.197 2008/10/20 17:02:40 fabiankeil
165 * If SIGHUP is received while we aren't running in daemon
166 * mode, calling init_error_log() would be a mistake.
168 * Revision 1.196 2008/10/16 09:16:41 fabiankeil
169 * - Fix two gcc44 conversion warnings.
170 * - Don't bother logging the last five bytes
173 * Revision 1.195 2008/10/13 16:04:37 fabiankeil
174 * Make sure we don't try to reuse tainted server sockets.
176 * Revision 1.194 2008/10/12 18:35:18 fabiankeil
177 * The last commit was a bit too ambitious, apparently the content
178 * length adjustment is only necessary if we aren't buffering.
180 * Revision 1.193 2008/10/12 15:57:35 fabiankeil
181 * Fix content length calculation if we read headers
182 * and the start of the body at once. Now that we have
183 * FEATURE_CONNECTION_KEEP_ALIVE, it actually matters.
185 * Revision 1.192 2008/10/11 18:19:14 fabiankeil
186 * Even more chat() cosmetics.
188 * Revision 1.191 2008/10/11 18:00:14 fabiankeil
189 * Reformat some comments in chat().
191 * Revision 1.190 2008/10/11 14:58:00 fabiankeil
192 * In case of chunk-encoded content, stop reading if
193 * the buffer looks like it ends with the last chunk.
195 * Revision 1.189 2008/10/11 09:53:00 fabiankeil
196 * Let server_response_is_complete() deal properly with
197 * content that is neither buffered nor read all at once.
199 * Revision 1.188 2008/10/09 18:21:41 fabiankeil
200 * Flush work-in-progress changes to keep outgoing connections
201 * alive where possible. Incomplete and mostly #ifdef'd out.
203 * Revision 1.187 2008/09/07 12:35:05 fabiankeil
204 * Add mutex lock support for _WIN32.
206 * Revision 1.186 2008/09/04 08:13:58 fabiankeil
207 * Prepare for critical sections on Windows by adding a
208 * layer of indirection before the pthread mutex functions.
210 * Revision 1.185 2008/08/30 12:03:07 fabiankeil
211 * Remove FEATURE_COOKIE_JAR.
213 * Revision 1.184 2008/08/22 15:34:45 fabiankeil
214 * - Silence LLVM/Clang complaint.
215 * - Make received_hup_signal static.
216 * - Hide definitions for basedir, pidfile and received_hup_signal
217 * from __EMX__ as they only seem to be used in case of #ifdef unix.
219 * Revision 1.183 2008/08/21 07:09:35 fabiankeil
220 * Accept Shoutcast responses again. Problem reported
221 * and fix suggested by Stefan in #2062860.
223 * Revision 1.182 2008/06/27 11:13:56 fabiankeil
224 * Fix possible NULL-pointer dereference reported
225 * by din_a4 in #2003937. Pointy hat to me.
227 * Revision 1.181 2008/05/21 15:47:15 fabiankeil
228 * Streamline sed()'s prototype and declare
229 * the header parse and add structures static.
231 * Revision 1.180 2008/05/21 15:26:32 fabiankeil
232 * - Mark csp as immutable for send_crunch_response().
233 * - Fix comment spelling.
235 * Revision 1.179 2008/05/20 20:13:32 fabiankeil
236 * Factor update_server_headers() out of sed(), ditch the
237 * first_run hack and make server_patterns_light static.
239 * Revision 1.178 2008/05/10 13:23:38 fabiankeil
240 * Don't provide get_header() with the whole client state
241 * structure when it only needs access to csp->iob.
243 * Revision 1.177 2008/05/10 11:51:12 fabiankeil
244 * Make the "read the rest of the headers" loop a bit more readable.
246 * Revision 1.176 2008/05/10 11:37:57 fabiankeil
247 * - Instead of logging when the IIS5 hack is enabled, log when it fails.
248 * - Remove useless comment.
250 * Revision 1.175 2008/05/09 18:53:59 fabiankeil
251 * Fix comment grammar.
253 * Revision 1.174 2008/05/07 18:05:53 fabiankeil
254 * Remove the pointless buffer in client_protocol_is_unsupported().
256 * Revision 1.173 2008/05/06 15:09:00 fabiankeil
257 * Least-effort fix for bug #1821930 (reported by Lee):
258 * If the response doesn't look like HTTP,
259 * tell the client and log the problem.
261 * Revision 1.172 2008/04/16 16:38:21 fabiankeil
262 * Don't pass the whole csp structure to flush_socket()
263 * when it only needs a file descriptor and a buffer.
265 * Revision 1.171 2008/03/27 18:27:25 fabiankeil
266 * Remove kill-popups action.
268 * Revision 1.170 2008/03/06 16:33:46 fabiankeil
269 * If limit-connect isn't used, don't limit CONNECT requests to port 443.
271 * Revision 1.169 2008/03/04 18:30:39 fabiankeil
272 * Remove the treat-forbidden-connects-like-blocks action. We now
273 * use the "blocked" page for forbidden CONNECT requests by default.
275 * Revision 1.168 2008/03/02 12:25:25 fabiankeil
276 * Also use shiny new connect_port_is_forbidden() in jcc.c.
278 * Revision 1.167 2008/02/23 16:57:12 fabiankeil
279 * Rename url_actions() to get_url_actions() and let it
280 * use the standard parameter ordering.
282 * Revision 1.166 2008/02/23 16:33:43 fabiankeil
283 * Let forward_url() use the standard parameter ordering
284 * and mark its second parameter immutable.
286 * Revision 1.165 2008/02/02 19:36:56 fabiankeil
287 * Remove the "Listening ... for local connections only" log message.
288 * Whether or not remote connections are able to reach Privoxy is up
289 * to the operating system.
291 * Revision 1.164 2007/12/16 18:32:46 fabiankeil
292 * Prevent the log messages for CONNECT requests to unacceptable
293 * ports from printing the limit-connect argument as [null] if
294 * limit-connect hasn't been explicitly enabled.
296 * Revision 1.163 2007/12/13 01:47:11 david__schmidt
297 * Make sure all console-mode apps get a usage() instance
299 * Revision 1.162 2007/12/06 17:54:57 fabiankeil
300 * Reword NO_SERVER_DATA_RESPONSE to make it harder
301 * to misunderstand what the message is all about.
303 * Revision 1.161 2007/12/04 19:44:22 fabiankeil
304 * Unbreak trustfile which previously didn't work without
305 * FEATURE_TOGGLE. Fixes BR#1843585, reported by Lee.
307 * Revision 1.160 2007/11/29 18:00:29 fabiankeil
308 * Plug memory leak. Spotted by Valgrind, triggered by
309 * Privoxy-Regression-Test feeding proxyfuzz.py.
311 * Revision 1.159 2007/11/24 14:34:09 fabiankeil
312 * In the HTTP snipplets, refer to the client as client.
314 * Revision 1.158 2007/11/11 16:44:17 fabiankeil
315 * Emit a log message when activating the MS IIS5 hack.
317 * Revision 1.157 2007/11/03 17:34:49 fabiankeil
318 * Log the "weak randomization factor" warning only
319 * once for mingw32 and provide some more details.
321 * Revision 1.156 2007/11/01 18:20:58 fabiankeil
322 * Initialize log module after initializing mutexes, future
323 * deadlocks in that code should now work cross-platform.
325 * Revision 1.155 2007/10/23 20:12:45 fabiankeil
326 * Fix first CSUCCEED line to end in \r\n as required by RFC1945.
327 * Reported by Bert van Leeuwen in BR#1818808.
329 * Revision 1.154 2007/10/19 17:00:08 fabiankeil
330 * Downgrade "Flushing header and buffers" message to LOG_LEVEL_INFO.
332 * Revision 1.153 2007/10/14 14:12:41 fabiankeil
333 * When in daemon mode, close stderr after the configuration file has been
334 * parsed the first time. If logfile isn't set, stop logging. Fixes BR#897436.
336 * Revision 1.152 2007/10/04 18:03:34 fabiankeil
337 * - Fix a crash when parsing invalid requests whose first header
338 * is rejected by get_header(). Regression (re?)introduced
339 * in r1.143 by yours truly.
340 * - Move ACTION_VANILLA_WAFER handling into parsers.c's
341 * client_cookie_adder() to make sure send-vanilla-wafer can be
342 * controlled through tags (and thus regression-tested).
344 * Revision 1.151 2007/09/29 10:21:16 fabiankeil
345 * - Move get_filter_function() from jcc.c to filters.c
346 * so the filter functions can be static.
347 * - Don't bother filtering body-less responses.
349 * Revision 1.150 2007/09/28 16:39:29 fabiankeil
350 * Execute content filters through execute_content_filter().
352 * Revision 1.149 2007/09/04 15:08:48 fabiankeil
353 * Initialize req to NULL to make sure it's defined if the
354 * first read_socket() call fails. Reported by icmp30.
356 * Revision 1.148 2007/08/26 16:47:13 fabiankeil
357 * Add Stephen Gildea's --pre-chroot-nslookup patch [#1276666],
358 * extensive comments moved to user manual.
360 * Revision 1.147 2007/08/25 14:42:40 fabiankeil
361 * Don't crash if a broken header filter wiped out the request line.
363 * Revision 1.146 2007/08/20 17:09:32 fabiankeil
364 * Fix byte_count calculation in case of flushes
365 * and don't parse the server headers a second time.
367 * Revision 1.145 2007/08/19 13:13:31 fabiankeil
368 * - If there's a connection problem after we already forwarded
369 * parts of the original content, just hang up. Fixes BR#1776724.
370 * - Fix warnings about unused code on mingw32.
371 * - In case of flushes, calculate the byte count
372 * less incorrectly (I think).
374 * Revision 1.144 2007/08/11 14:43:22 fabiankeil
375 * Add some more prototypes for static functions.
377 * Revision 1.143 2007/08/05 13:58:19 fabiankeil
378 * Comment out request_contains_null_bytes() until it's used again.
380 * Revision 1.142 2007/08/05 13:50:26 fabiankeil
381 * #1763173 from Stefan Huehner: s@const static@static const@
382 * and declare some more functions static.
384 * Revision 1.141 2007/08/04 09:56:23 fabiankeil
385 * - Log rejected CONNECT requests with LOG_LEVEL_INFO
386 * and explain why they were rejected in the first place.
387 * - Fix the LOG_LEVEL_CLF message for crunches of unallowed
388 * CONNECT requests. The request line was missing.
389 * - Add two more XXX reminders as we don't have enough already.
391 * Revision 1.140 2007/07/21 11:51:36 fabiankeil
392 * As Hal noticed, checking dispatch_cgi() as the last cruncher
393 * looks like a bug if CGI requests are blocked unintentionally,
394 * so don't do it unless the user enabled the new config option
395 * "allow-cgi-request-crunching".
397 * Revision 1.139 2007/07/14 07:46:41 fabiankeil
398 * - Allow to rewrite the request destination behind the client's back.
399 * - Turn the weird-looking unconditional for loop that
400 * reads the client request into a conditional while loop.
401 * Move the stuff that only runs once out of the loop.
402 * - Move parts of chat(), server_content_type() and the
403 * necessary stuff to fix BR#1750917 into get_filter_function().
405 * Revision 1.138 2007/06/03 18:45:18 fabiankeil
406 * Temporary workaround for BR#1730105.
408 * Revision 1.137 2007/06/01 18:16:36 fabiankeil
409 * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
410 * deadlocks and crashes on OpenBSD and possibly other OS with neither
411 * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
412 * Thanks to Ralf Horstmann for report and solution.
414 * Revision 1.136 2007/06/01 16:41:11 fabiankeil
415 * Add forward-override{} to change the forwarding settings through
416 * action sections. This is mainly interesting to forward different
417 * clients differently (for example based on User-Agent or request
420 * Revision 1.135 2007/05/24 17:03:50 fabiankeil
421 * - Let usage() mention the --chroot parameter.
422 * - Use read_socket() consistently and always leave
423 * the last buffer byte alone, even in cases where
424 * null termination (currently) doesn't matter.
426 * Revision 1.134 2007/05/16 14:59:46 fabiankeil
427 * - Fix config file loading on Unix if no config file is specified.
428 * Since r1.97 Privoxy would always interpret the last argument as
429 * config file, even if it's a valid command line option.
430 * - Abort in case of unrecognized command line options. Closes #1719696.
431 * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
432 * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
434 * Revision 1.133 2007/05/04 11:23:19 fabiankeil
435 * - Don't rerun crunchers that only depend on the request URL.
436 * - Don't count redirects and CGI requests as "blocked requests".
438 * Revision 1.132 2007/04/25 15:15:17 fabiankeil
439 * Support crunching based on tags created by server-header taggers.
441 * Revision 1.131 2007/04/22 13:24:50 fabiankeil
442 * Make HTTP snippets static (again). Add a Content-Type for those
443 * with content so the browser doesn't guess it based on the URL.
445 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
446 * Move crunching and request line rebuilding out of chat().
448 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
449 * Introduce tags as alternative way to specify which
450 * actions apply to a request. At the moment tags can be
451 * created based on client and server headers.
453 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
454 * Don't CLF-log CONNECT requests twice.
456 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
457 * Log the source address for ACL-related connection drops.
459 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
460 * New config option: enforce-blocks.
462 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
463 * - Move null byte check into separate function.
464 * - Don't confuse the client with error pages
465 * if a CONNECT request was already confirmed.
467 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
468 * Speed up NULL byte escaping and only log the complete
469 * NULL byte requests with header debugging enabled.
471 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
472 * Answer requests that contain NULL bytes with
473 * a custom response instead of waiting for more
474 * data until the client eventually hangs up.
476 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
477 * - Move delivery and logging of crunched responses
478 * from chat() into send_crunch_response().
479 * - Display the reason for generating http_responses.
480 * - Log the content length for LOG_LEVEL_CLF correctly
481 * (still incorrect for some fixed responses).
482 * - Reword an incorrect comment about
483 * treat-forbidden-connects-like-blocks violating
485 * - Add some log messages.
487 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
488 * Move mutex initialization into separate
489 * function and exit in case of errors.
491 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
492 * - Start to reduce chat()'s line count and move
493 * parts of it into separate functions.
494 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
496 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
497 * - Add Proxy-Agent header to HTTP snippets that are
498 * supposed to reach HTTP clients only.
499 * - Made a few CONNECT log messages more descriptive.
500 * - Catch completely empty server responses (as seen
501 * with Tor's fake ".noconnect" top level domain).
502 * - Use shiny new "forwarding-failed" template for socks errors.
504 * Revision 1.118 2007/01/07 07:43:43 joergs
505 * AmigaOS4 support added.
507 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
508 * Added config option accept-intercepted-requests
509 * and disabled it by default.
511 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
512 * Reverted parts of my last commit
513 * to keep error handling working.
515 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
516 * Fixed gcc43 conversion warnings.
518 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
519 * Fix -pedantic ISO C warning about converting
520 * from function pointer to object pointer.
522 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
523 * Silence compiler warning I introduced with my last commit.
525 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
526 * Mutex protect rand() if POSIX threading
527 * is used, warn the user if that's not possible
528 * and stop using it on _WIN32 where it could
531 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
532 * Don't prevent core dumps by catching SIGABRT.
533 * It's rude and makes debugging unreasonable painful.
535 * Revision 1.110 2006/12/13 14:52:53 etresoft
536 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
538 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
539 * Privoxy is now able to run as intercepting
540 * proxy in combination with any packet filter
541 * that does the port redirection. The destination
542 * is extracted from the "Host:" header which
543 * should be available for nearly all requests.
545 * Moved HTTP snipplets into jcc.c.
546 * Added error message for gopher proxy requests.
548 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
549 * Only unlink the pidfile if it's actually used.
551 * Change order of interception checks to make
552 * it possible to block or redirect requests for
555 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
556 * Make pthread mutex locking more generic. Instead of
557 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
558 * and use mutex locking unless there is an _r function
559 * available. Better safe than sorry.
561 * Fixes "./configure --disable-pthread" and should result
562 * in less threading-related problems on pthread-using platforms,
563 * but it still doesn't fix BR#1122404.
565 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
566 * Move pthread.h inclusion from jcc.c to jcc.h.
567 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
569 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
570 * Don't exit after receiving the second SIGHUP on Solaris.
572 * Fixes BR 1052235, but the same problem may exist on other
573 * systems. Once 3.0.6 is out we should use sigset()
574 * where available and see if it breaks anything.
576 * Revision 1.104 2006/09/23 13:26:38 roro
577 * Replace TABs by spaces in source code.
579 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
580 * Fix +redirect{}. Didn't work with -fast-redirects.
582 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
583 * Respond with 400 and a short text message
584 * if the client tries to use Privoxy as FTP proxy.
586 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
587 * Make number of retries in case of forwarded-connect problems
588 * a config file option (forwarded-connect-retries) and use 0 as
591 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
592 * Set random(3) seed.
594 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
595 * Follow the OpenBSD port's lead and protect the resolve
596 * functions on OpenBSD as well.
598 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
599 * --user fix. Only use the user as group if no group is specified.
600 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
602 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
603 * Windows service (re-)integration
607 * --install[:service_name]
608 * --uninstall[:service_name]
611 * They work as follows:
612 * --install will create a service for you and then terminate.
613 * By default the service name will be "privoxy" (without the quotes).
614 * However you can run multiple services if you wish, just by adding
615 * a colon and then a name (no spaces).
617 * --uninstall follows the exact same rules a --install.
619 * --service is used when the program is executed by the service
620 * control manager, and in normal circumstances would never be
621 * used as a command line argument.
623 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
624 * Windows service integration
626 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
627 * Incorporate Fabian Keil's patch work:
628 http://www.fabiankeil.de/sourcecode/privoxy/
630 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
631 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
632 * with what was really the latest development (the v_3_0_branch branch)
634 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
635 * Thanks to Jindrich Makovicka for a race condition fix for the log
636 * file. The race condition remains for non-pthread implementations.
637 * Reference patch #1175720.
639 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
640 * Add the ability to check jpeg images for invalid
641 * lengths of comment blocks. Defensive strategy
642 * against the exploit:
643 * Microsoft Security Bulletin MS04-028
644 * Buffer Overrun in JPEG Processing (GDI+) Could
645 * Allow Code Execution (833987)
646 * Enabled with +inspect-jpegs in actions files.
648 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
649 * - Fixed usage info for non-unix platforms
650 * - Fixed small cmdline parsing bug
652 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
653 * Diagnostics: Now preserve the returncode of pthread_create
654 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
656 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
657 * No longer ignore SIGCHLD. Fixes bug #769381
659 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
660 * Close jarfile on graceful exit, remove stray line
662 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
663 * Cosmetics: Killed a warning, a typo and an allocation left at exit
665 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
666 * No longer rely on non-POSIX.1 extensions of getcwd().
669 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
670 * Replaced setenv() by posix-compliant putenv()
671 * Thanks to Neil McCalden (nmcc AT users.sf.net).
673 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
674 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
676 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
677 * Clean-up and extension of improvements for forked mode:
678 * - Child's return code now consists of flags RC_FLAG_*
679 * - Reporting toggle to parent now properly #ifdef'ed
680 * - Children now report blocking to parent. This enables
681 * statistics in forked mode
683 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
684 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
685 * Children now report having been toggled through _exit(17), parents
686 * watch for that code and toggle themselves if found.
688 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
689 * Wrapping all *_r functions (the non-_r versions of them) with
690 * mutex semaphores for OSX. Hopefully this will take care of all
691 * of those pesky crash reports.
693 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
694 * Fixed two mostly harmless mem leaks
696 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
697 * Fix: Head of global clients list now initialized to NULL
699 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
700 * Added basic support for OPTIONS and TRACE HTTP methods:
701 * - New interceptor direct_response() added in chat().
702 * - sed() moved to earlier in the process, so that the
703 * Host: header is evaluated before actions and forwarding
706 * Revision 1.92 2002/05/08 16:00:46 oes
707 * Chat's buffer handling:
708 * - Fixed bug with unchecked out-of-mem conditions
709 * while reading client request & server headers
710 * - No longer predict if the buffer limit will be exceeded
711 * in the next read -- check add_to_iob's new
712 * return code. If buffer couldn't be extended
713 * (policy or out-of-mem) while
714 * - reading from client: abort
715 * - reading server headers: send error page
716 * - buffering server body for filter: flush,
717 * and if that fails: send error page
719 * Revision 1.91 2002/04/08 20:35:58 swa
722 * Revision 1.90 2002/04/02 14:57:28 oes
723 * Made sending wafers independent of FEATURE_COOKIE_JAR
725 * Revision 1.89 2002/03/31 17:18:59 jongfoster
726 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
728 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
729 * More compiler warning message maintenance
731 * Revision 1.87 2002/03/26 22:29:54 swa
732 * we have a new homepage!
734 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
735 * Workaround for closing the jarfile before load_config() comes around again
737 * Revision 1.85 2002/03/24 15:23:33 jongfoster
740 * Revision 1.84 2002/03/24 13:25:43 swa
741 * name change related issues
743 * Revision 1.83 2002/03/16 23:54:06 jongfoster
744 * Adding graceful termination feature, to help look for memory leaks.
745 * If you enable this (which, by design, has to be done by hand
746 * editing config.h) and then go to http://i.j.b/die, then the program
747 * will exit cleanly after the *next* request. It should free all the
748 * memory that was used.
750 * Revision 1.82 2002/03/13 00:27:05 jongfoster
753 * Revision 1.81 2002/03/12 01:42:50 oes
754 * Introduced modular filters
756 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
757 * OS/2 port maintenance:
758 * - Fixed EMX build - it had decayed a little
759 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
760 * substituted a memset for now.
762 * Revision 1.79 2002/03/09 20:03:52 jongfoster
763 * - Making various functions return int rather than size_t.
764 * (Undoing a recent change). Since size_t is unsigned on
765 * Windows, functions like read_socket that return -1 on
766 * error cannot return a size_t.
768 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
769 * crashes, and also frequently caused JB to jump to 100%
770 * CPU and stay there. (Because it thought it had just
771 * read ((unsigned)-1) == 4Gb of data...)
773 * - The signature of write_socket has changed, it now simply
774 * returns success=0/failure=nonzero.
776 * - Trying to get rid of a few warnings --with-debug on
777 * Windows, I've introduced a new type "jb_socket". This is
778 * used for the socket file descriptors. On Windows, this
779 * is SOCKET (a typedef for unsigned). Everywhere else, it's
780 * an int. The error value can't be -1 any more, so it's
781 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
782 * Windows it maps to the #define INVALID_SOCKET.)
784 * - The signature of bind_port has changed.
786 * Revision 1.78 2002/03/08 21:35:04 oes
787 * Added optional group supplement to --user option. Will now use default group of user if no group given
789 * Revision 1.77 2002/03/07 03:52:06 oes
790 * - Fixed compiler warnings etc
791 * - Improved handling of failed DNS lookups
793 * Revision 1.76 2002/03/06 22:54:35 jongfoster
794 * Automated function-comment nitpicking.
796 * Revision 1.75 2002/03/06 10:02:19 oes
797 * Fixed stupid bug when --user was not given
799 * Revision 1.74 2002/03/06 00:49:31 jongfoster
800 * Fixing warning on Windows
801 * Making #ifdefs that refer to the same variable consistently
802 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
804 * Revision 1.73 2002/03/05 23:57:30 hal9
805 * Stray character 's' on line 1618 was breaking build.
807 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
808 * - Re-enable OS/2 building after new parms were added
809 * - Fix false out of memory report when resolving CGI templates when no IP
810 * address is available of failed attempt (a la no such domain)
812 * Revision 1.71 2002/03/05 18:13:56 oes
813 * Added --user option
815 * Revision 1.70 2002/03/05 04:52:42 oes
816 * Deleted non-errlog debugging code
818 * Revision 1.69 2002/03/04 23:50:00 jongfoster
819 * Splitting off bind_port() call into bind_port_helper(), with
822 * Revision 1.68 2002/03/04 20:17:32 oes
825 * Revision 1.67 2002/03/04 18:18:57 oes
826 * - Removed _DEBUG mode
827 * - Cleand up cmdline parsing
828 * - Introduced --no-daemon, --pidfile options
829 * - Cleaned up signal handling:
830 * - Terminate cleanly on INT, TERM and ABRT
831 * - Schedule logfile for re-opening on HUP
832 * - Ignore CHLD and PIPE
833 * - Leave the rest with their default handlers
834 * - Uniform handler registration
835 * - Added usage() function
836 * - Played styleguide police
838 * Revision 1.66 2002/03/03 15:06:55 oes
839 * Re-enabled automatic config reloading
841 * Revision 1.65 2002/03/03 14:49:11 oes
842 * Fixed CLF logging: Now uses client's original HTTP request
844 * Revision 1.64 2002/03/03 09:18:03 joergs
845 * Made jumbjuster work on AmigaOS again.
847 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
848 * Clean up a little CRLF unpleasantness that suddenly appeared
850 * Revision 1.62 2002/02/20 23:17:23 jongfoster
851 * Detecting some out-of memory conditions and exiting with a log message.
853 * Revision 1.61 2002/01/17 21:01:52 jongfoster
854 * Moving all our URL and URL pattern parsing code to urlmatch.c.
856 * Revision 1.60 2001/12/30 14:07:32 steudten
857 * - Add signal handling (unix)
858 * - Add SIGHUP handler (unix)
859 * - Add creation of pidfile (unix)
860 * - Add action 'top' in rc file (RH)
861 * - Add entry 'SIGNALS' to manpage
862 * - Add exit message to logfile (unix)
864 * Revision 1.59 2001/12/13 14:07:18 oes
865 * Fixed Bug: 503 error page now sent OK
867 * Revision 1.58 2001/11/30 23:37:24 jongfoster
868 * Renaming the Win32 config file to config.txt - this is almost the
869 * same as the corresponding UNIX name "config"
871 * Revision 1.57 2001/11/16 00:47:43 jongfoster
872 * Changing the tty-disconnection code to use setsid().
874 * Revision 1.56 2001/11/13 20:20:54 jongfoster
875 * Tabs->spaces, fixing a bug with missing {} around an if()
877 * Revision 1.55 2001/11/13 20:14:53 jongfoster
878 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
880 * Revision 1.54 2001/11/07 00:03:14 steudten
881 * Give reliable return value if an error
882 * occurs not just 0 with new daemon mode.
884 * Revision 1.53 2001/11/05 21:41:43 steudten
885 * Add changes to be a real daemon just for unix os.
886 * (change cwd to /, detach from controlling tty, set
887 * process group and session leader to the own process.
889 * Add some fatal-error log message for failed malloc().
890 * Add '-d' if compiled with 'configure --with-debug' to
891 * enable debug output.
893 * Revision 1.52 2001/10/26 20:11:20 jongfoster
894 * Fixing type mismatch
896 * Revision 1.51 2001/10/26 17:38:28 oes
899 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
900 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
901 * threads to call select() simultaneously. So, it's time to do a real, live,
902 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
903 * (native). Both versions will work, but using __OS2__ offers multi-threading.
905 * Revision 1.49 2001/10/23 21:41:35 jongfoster
906 * Added call to initialize the (statically-allocated of course)
907 * "out of memory" CGI response.
909 * Revision 1.48 2001/10/10 19:56:46 jongfoster
910 * Moving some code that wasn't cookie-related out of an #ifdef
913 * Revision 1.47 2001/10/10 16:44:36 oes
914 * Added CONNECT destination port limitation check
916 * Revision 1.46 2001/10/08 15:17:41 oes
917 * Re-enabled SSL forwarding
919 * Revision 1.45 2001/10/07 15:42:11 oes
920 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
922 * Moved downgrading of the HTTP version from parse_http_request to
923 * chat(), since we can't decide if it is necessary before we have
924 * determined the actions for the URL. The HTTP command is now
925 * *always* re-built so the repairs need no longer be special-cased.
927 * filter_popups now gets a csp pointer so it can raise the new
928 * CSP_FLAG_MODIFIED flag.
932 * Added configurable size limit for the IOB. If the IOB grows so
933 * large that the next read would exceed the limit, the header
934 * is generated, and the header & unfiltered buffer are flushed
935 * to the client. Chat then continues in non-buffering,
936 * non-filtering body mode.
938 * Revision 1.44 2001/10/02 18:13:57 oes
941 * Revision 1.43 2001/10/02 15:32:13 oes
942 * Moved generation of hdr
944 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
945 * Cleaning up 2 compiler warnings on OS/2.
947 * Revision 1.41 2001/09/16 17:05:14 jongfoster
948 * Removing unused #include showarg.h
950 * Revision 1.40 2001/09/16 15:41:45 jongfoster
951 * Fixing signed/unsigned comparison warning.
953 * Revision 1.39 2001/09/16 13:21:27 jongfoster
954 * Changes to use new list functions.
956 * Revision 1.38 2001/09/16 13:01:46 jongfoster
957 * Removing redundant function call that zeroed zalloc()'d memory.
959 * Revision 1.37 2001/09/10 11:12:24 oes
960 * Deleted unused variable
962 * Revision 1.36 2001/09/10 10:56:15 oes
963 * Silenced compiler warnings
965 * Revision 1.35 2001/07/31 14:44:22 oes
966 * Deleted unused size parameter from filter_popups()
968 * Revision 1.34 2001/07/30 22:08:36 jongfoster
969 * Tidying up #defines:
970 * - All feature #defines are now of the form FEATURE_xxx
971 * - Permanently turned off WIN_GUI_EDIT
972 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
974 * Revision 1.33 2001/07/29 19:32:00 jongfoster
975 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
977 * Revision 1.32 2001/07/29 18:47:05 jongfoster
978 * Adding missing #include "loadcfg.h"
980 * Revision 1.31 2001/07/29 12:17:48 oes
981 * Applied pthread fix by Paul Lieverse
983 * Revision 1.30 2001/07/25 22:57:13 jongfoster
984 * __BEOS__ no longer overrides FEATURE_PTHREAD.
985 * This is because FEATURE_PTHREAD will soon be widely used, so I
986 * want to keep it simple.
988 * Revision 1.29 2001/07/24 12:47:06 oes
989 * Applied BeOS support update by Eugenia
991 * Revision 1.28 2001/07/23 13:26:12 oes
992 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
994 * Revision 1.27 2001/07/19 19:09:47 haroon
995 * - Added code to take care of the situation where while processing the first
996 * server response (which includes the server header), after finding the end
997 * of the headers we were not looking past the end of the headers for
998 * content modification. I enabled it for filter_popups.
999 * Someone else should look to see if other similar operations should be
1000 * done to the discarded portion of the buffer.
1002 * Note 2001/07/20: No, the other content modification mechanisms will process
1003 * the whole iob later anyway. --oes
1005 * Revision 1.26 2001/07/18 12:31:36 oes
1008 * Revision 1.25 2001/07/15 19:43:49 jongfoster
1009 * Supports POSIX threads.
1010 * Also removed some unused #includes.
1012 * Revision 1.24 2001/07/13 14:00:40 oes
1013 * - Generic content modification scheme:
1014 * Each feature has its own applicability flag that is set
1015 * from csp->action->flags.
1016 * Replaced the "filtering" int flag , by a function pointer
1017 * "content_filter" to the function that will do the content
1018 * modification. If it is != NULL, the document will be buffered
1019 * and processed through *content_filter, which must set
1020 * csp->content_length and return a modified copy of the body
1021 * or return NULL (on failiure).
1022 * - Changed csp->is_text to the more generic bitmap csp->content_type
1023 * which can currently take the valued CT_TEXT or CT_GIF
1024 * - Reformatting etc
1025 * - Removed all #ifdef PCRS
1027 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
1028 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
1029 * the `block_acl' call. This prevents a compilation error when the user
1030 * does not wish to use the "ACL" feature.
1032 * Revision 1.22 2001/06/29 21:45:41 oes
1033 * Indentation, CRLF->LF, Tab-> Space
1035 * Revision 1.21 2001/06/29 13:29:36 oes
1036 * - Cleaned up, improved comments
1037 * - Unified all possible interceptors (CGI,
1038 * block, trust, fast_redirect) in one
1039 * place, with one (CGI) answer generation
1040 * mechansim. Much clearer now.
1041 * - Removed the GIF image generation, which
1042 * is now done in filters.c:block_url()
1043 * - Made error conditions like domain lookup
1044 * failiure or (various) problems while talking
1045 * to the server use cgi.c:error_response()
1046 * instead of generating HTML/HTTP in chat() (yuck!)
1047 * - Removed logentry from cancelled commit
1049 * Revision 1.20 2001/06/09 10:55:28 jongfoster
1050 * Changing BUFSIZ ==> BUFFER_SIZE
1052 * Revision 1.19 2001/06/07 23:12:52 jongfoster
1053 * Replacing function pointer in struct gateway with a directly
1054 * called function forwarded_connect().
1055 * Replacing struct gateway with struct forward_spec
1057 * Revision 1.18 2001/06/03 19:12:16 oes
1058 * introduced new cgi handling
1060 * Revision 1.17 2001/06/01 20:07:23 jongfoster
1061 * Now uses action +image-blocker{} rather than config->tinygif
1063 * Revision 1.16 2001/06/01 18:49:17 jongfoster
1064 * Replaced "list_share" with "list" - the tiny memory gain was not
1065 * worth the extra complexity.
1067 * Revision 1.15 2001/05/31 21:24:47 jongfoster
1068 * Changed "permission" to "action" throughout.
1069 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
1070 * Moved vanilla wafer check into chat(), since we must now
1071 * decide whether or not to add it based on the URL.
1073 * Revision 1.14 2001/05/29 20:14:01 joergs
1074 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
1077 * Revision 1.13 2001/05/29 09:50:24 jongfoster
1078 * Unified blocklist/imagelist/permissionslist.
1079 * File format is still under discussion, but the internal changes
1080 * are (mostly) done.
1082 * Also modified interceptor behaviour:
1083 * - We now intercept all URLs beginning with one of the following
1084 * prefixes (and *only* these prefixes):
1086 * * http://ijbswa.sf.net/config/
1087 * * http://ijbswa.sourceforge.net/config/
1088 * - New interceptors "home page" - go to http://i.j.b/ to see it.
1089 * - Internal changes so that intercepted and fast redirect pages
1090 * are not replaced with an image.
1091 * - Interceptors now have the option to send a binary page direct
1092 * to the client. (i.e. ijb-send-banner uses this)
1093 * - Implemented show-url-info interceptor. (Which is why I needed
1094 * the above interceptors changes - a typical URL is
1095 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
1096 * The previous mechanism would not have intercepted that, and
1097 * if it had been intercepted then it then it would have replaced
1098 * it with an image.)
1100 * Revision 1.12 2001/05/27 22:17:04 oes
1102 * - re_process_buffer no longer writes the modified buffer
1103 * to the client, which was very ugly. It now returns the
1104 * buffer, which it is then written by chat.
1106 * - content_length now adjusts the Content-Length: header
1107 * for modified documents rather than crunch()ing it.
1108 * (Length info in csp->content_length, which is 0 for
1109 * unmodified documents)
1111 * - For this to work, sed() is called twice when filtering.
1113 * Revision 1.11 2001/05/26 17:27:53 jongfoster
1114 * Added support for CLF and fixed LOG_LEVEL_LOG.
1115 * Also did CRLF->LF fix of my previous patch.
1117 * Revision 1.10 2001/05/26 15:26:15 jongfoster
1118 * ACL feature now provides more security by immediately dropping
1119 * connections from untrusted hosts.
1121 * Revision 1.9 2001/05/26 00:28:36 jongfoster
1122 * Automatic reloading of config file.
1123 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
1124 * Most of the global variables have been moved to a new
1125 * struct configuration_spec, accessed through csp->config->globalname
1126 * Most of the globals remaining are used by the Win32 GUI.
1128 * Revision 1.8 2001/05/25 22:43:18 jongfoster
1129 * Fixing minor memory leak and buffer overflow.
1131 * Revision 1.7 2001/05/25 22:34:30 jongfoster
1134 * Revision 1.6 2001/05/23 00:13:58 joergs
1135 * AmigaOS support fixed.
1137 * Revision 1.5 2001/05/22 18:46:04 oes
1139 * - Enabled filtering banners by size rather than URL
1140 * by adding patterns that replace all standard banner
1141 * sizes with the "Junkbuster" gif to the re_filterfile
1143 * - Enabled filtering WebBugs by providing a pattern
1144 * which kills all 1x1 images
1146 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
1147 * which is selected by the (nonstandard and therefore
1148 * capital) letter 'U' in the option string.
1149 * It causes the quantifiers to be ungreedy by default.
1150 * Appending a ? turns back to greedy (!).
1152 * - Added a new interceptor ijb-send-banner, which
1153 * sends back the "Junkbuster" gif. Without imagelist or
1154 * MSIE detection support, or if tinygif = 1, or the
1155 * URL isn't recognized as an imageurl, a lame HTML
1156 * explanation is sent instead.
1158 * - Added new feature, which permits blocking remote
1159 * script redirects and firing back a local redirect
1161 * The feature is conditionally compiled, i.e. it
1162 * can be disabled with --disable-fast-redirects,
1163 * plus it must be activated by a "fast-redirects"
1164 * line in the config file, has its own log level
1165 * and of course wants to be displayed by show-proxy-args
1166 * Note: Boy, all the #ifdefs in 1001 locations and
1167 * all the fumbling with configure.in and acconfig.h
1168 * were *way* more work than the feature itself :-(
1170 * - Because a generic redirect template was needed for
1171 * this, tinygif = 3 now uses the same.
1173 * - Moved GIFs, and other static HTTP response templates
1176 * - Some minor fixes
1178 * - Removed some >400 CRs again (Jon, you really worked
1181 * Revision 1.4 2001/05/21 19:34:01 jongfoster
1182 * Made failure to bind() a fatal error.
1184 * Revision 1.3 2001/05/20 01:21:20 jongfoster
1185 * Version 2.9.4 checkin.
1186 * - Merged popupfile and cookiefile, and added control over PCRS
1187 * filtering, in new "permissionsfile".
1188 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
1189 * file error you now get a message box (in the Win32 GUI) rather
1190 * than the program exiting with no explanation.
1191 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
1193 * - Removed tabs from "config"
1194 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
1195 * - Bumped up version number.
1197 * Revision 1.2 2001/05/17 22:34:44 oes
1198 * - Added hint on GIF char array generation to jcc.c
1199 * - Cleaned CRLF's from the sources and related files
1200 * - Repaired logging for REF and FRC
1202 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
1203 * Initial import of version 2.9.3 source tree
1206 *********************************************************************/
1212 #include <sys/types.h>
1221 # ifndef FEATURE_PTHREAD
1225 # include <windows.h>
1226 # include <process.h>
1227 # endif /* ndef FEATURE_PTHREAD */
1230 # ifndef _WIN_CONSOLE
1231 # include "w32log.h"
1232 # endif /* ndef _WIN_CONSOLE */
1233 # include "w32svrapi.h"
1235 #else /* ifndef _WIN32 */
1237 # if !defined (__OS2__)
1238 # include <unistd.h>
1239 # include <sys/wait.h>
1240 # endif /* ndef __OS2__ */
1241 # include <sys/time.h>
1242 # include <sys/stat.h>
1243 # include <sys/ioctl.h>
1246 #include <sys/termios.h>
1254 # include <signal.h>
1257 # include <socket.h> /* BeOS has select() for sockets only. */
1258 # include <OS.h> /* declarations for threads and stuff. */
1261 # if defined(__EMX__) || defined(__OS2__)
1262 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
1267 #define bzero(B,N) memset(B,0x00,n)
1271 # include <select.h>
1276 #include "project.h"
1279 #include "filters.h"
1280 #include "loaders.h"
1281 #include "parsers.h"
1282 #include "miscutil.h"
1284 #include "jbsockets.h"
1285 #include "gateway.h"
1286 #include "actions.h"
1288 #include "loadcfg.h"
1289 #include "urlmatch.h"
1291 const char jcc_h_rcs[] = JCC_H_VERSION;
1292 const char project_h_rcs[] = PROJECT_H_VERSION;
1295 struct client_state clients[1];
1296 struct file_list files[1];
1298 #ifdef FEATURE_STATISTICS
1299 int urls_read = 0; /* total nr of urls read inc rejected */
1300 int urls_rejected = 0; /* total nr of urls rejected */
1301 #endif /* def FEATURE_STATISTICS */
1303 #ifdef FEATURE_GRACEFUL_TERMINATION
1304 int g_terminate = 0;
1307 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1308 static void sig_handler(int the_signal);
1310 static int client_protocol_is_unsupported(const struct client_state *csp, char *req);
1311 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
1312 static jb_err get_server_headers(struct client_state *csp);
1313 static const char *crunch_reason(const struct http_response *rsp);
1314 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp);
1315 static char *get_request_line(struct client_state *csp);
1316 static jb_err receive_client_request(struct client_state *csp);
1317 static jb_err parse_client_request(struct client_state *csp);
1318 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
1319 static jb_err change_request_destination(struct client_state *csp);
1320 static void chat(struct client_state *csp);
1321 static void serve(struct client_state *csp);
1322 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1323 static void usage(const char *myname);
1325 static void initialize_mutexes(void);
1326 static jb_socket bind_port_helper(struct configuration_spec *config);
1327 static void listen_loop(void);
1330 void serve(struct client_state *csp);
1331 #else /* ifndef AMIGA */
1332 static void serve(struct client_state *csp);
1333 #endif /* def AMIGA */
1336 static int32 server_thread(void *data);
1337 #endif /* def __BEOS__ */
1340 #define sleep(N) Sleep(((N) * 1000))
1344 #define sleep(N) DosSleep(((N) * 100))
1347 #ifdef MUTEX_LOCKS_AVAILABLE
1349 * XXX: Does the locking stuff really belong in this file?
1351 privoxy_mutex_t log_mutex;
1352 privoxy_mutex_t log_init_mutex;
1353 privoxy_mutex_t connection_reuse_mutex;
1355 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
1356 privoxy_mutex_t resolver_mutex;
1357 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
1359 #ifndef HAVE_GMTIME_R
1360 privoxy_mutex_t gmtime_mutex;
1361 #endif /* ndef HAVE_GMTIME_R */
1363 #ifndef HAVE_LOCALTIME_R
1364 privoxy_mutex_t localtime_mutex;
1365 #endif /* ndef HAVE_GMTIME_R */
1368 privoxy_mutex_t rand_mutex;
1369 #endif /* ndef HAVE_RANDOM */
1371 #endif /* def MUTEX_LOCKS_AVAILABLE */
1374 const char *basedir = NULL;
1375 const char *pidfile = NULL;
1376 static int received_hup_signal = 0;
1377 #endif /* defined unix */
1379 /* HTTP snipplets. */
1380 static const char CSUCCEED[] =
1381 "HTTP/1.0 200 Connection established\r\n"
1382 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
1384 static const char CHEADER[] =
1385 "HTTP/1.0 400 Invalid header received from client\r\n"
1386 "Proxy-Agent: Privoxy " VERSION "\r\n"
1387 "Content-Type: text/plain\r\n"
1388 "Connection: close\r\n\r\n"
1389 "Invalid header received from client.\r\n";
1391 static const char FTP_RESPONSE[] =
1392 "HTTP/1.0 400 Invalid request received from client\r\n"
1393 "Content-Type: text/plain\r\n"
1394 "Connection: close\r\n\r\n"
1395 "Invalid request. Privoxy doesn't support FTP.\r\n";
1397 static const char GOPHER_RESPONSE[] =
1398 "HTTP/1.0 400 Invalid request received from client\r\n"
1399 "Content-Type: text/plain\r\n"
1400 "Connection: close\r\n\r\n"
1401 "Invalid request. Privoxy doesn't support gopher.\r\n";
1403 /* XXX: should be a template */
1404 static const char MISSING_DESTINATION_RESPONSE[] =
1405 "HTTP/1.0 400 Bad request received from client\r\n"
1406 "Proxy-Agent: Privoxy " VERSION "\r\n"
1407 "Content-Type: text/plain\r\n"
1408 "Connection: close\r\n\r\n"
1409 "Bad request. Privoxy was unable to extract the destination.\r\n";
1411 /* XXX: should be a template */
1412 static const char NO_SERVER_DATA_RESPONSE[] =
1413 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1414 "Proxy-Agent: Privoxy " VERSION "\r\n"
1415 "Content-Type: text/plain\r\n"
1416 "Connection: close\r\n\r\n"
1417 "Empty server or forwarder response.\r\n"
1418 "The connection has been closed but Privoxy didn't receive any data.\r\n";
1420 /* XXX: should be a template */
1421 static const char INVALID_SERVER_HEADERS_RESPONSE[] =
1422 "HTTP/1.0 502 Server or forwarder response invalid\r\n"
1423 "Proxy-Agent: Privoxy " VERSION "\r\n"
1424 "Content-Type: text/plain\r\n"
1425 "Connection: close\r\n\r\n"
1426 "Bad response. The server or forwarder response doesn't look like HTTP.\r\n";
1429 /* XXX: should be a template */
1430 static const char NULL_BYTE_RESPONSE[] =
1431 "HTTP/1.0 400 Bad request received from client\r\n"
1432 "Proxy-Agent: Privoxy " VERSION "\r\n"
1433 "Content-Type: text/plain\r\n"
1434 "Connection: close\r\n\r\n"
1435 "Bad request. Null byte(s) before end of request.\r\n";
1438 /* XXX: should be a template */
1439 static const char MESSED_UP_REQUEST_RESPONSE[] =
1440 "HTTP/1.0 400 Malformed request after rewriting\r\n"
1441 "Proxy-Agent: Privoxy " VERSION "\r\n"
1442 "Content-Type: text/plain\r\n"
1443 "Connection: close\r\n\r\n"
1444 "Bad request. Messed up with header filters.\r\n";
1446 /* XXX: should be a template */
1447 static const char CONNECTION_TIMEOUT_RESPONSE[] =
1448 "HTTP/1.0 502 Connection timeout\r\n"
1449 "Proxy-Agent: Privoxy " VERSION "\r\n"
1450 "Content-Type: text/plain\r\n"
1451 "Connection: close\r\n\r\n"
1452 "The connection timed out.\r\n";
1454 /* A function to crunch a response */
1455 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
1457 /* Crunch function flags */
1458 #define CF_NO_FLAGS 0
1459 /* Cruncher applies to forced requests as well */
1460 #define CF_IGNORE_FORCE 1
1461 /* Crunched requests are counted for the block statistics */
1462 #define CF_COUNT_AS_REJECT 2
1464 /* A crunch function and its flags */
1467 const crunch_func_ptr cruncher;
1471 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
1473 /* Complete list of cruncher functions */
1474 static const struct cruncher crunchers_all[] = {
1475 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
1476 { block_url, CF_COUNT_AS_REJECT },
1477 #ifdef FEATURE_TRUST
1478 { trust_url, CF_COUNT_AS_REJECT },
1479 #endif /* def FEATURE_TRUST */
1480 { redirect_url, CF_NO_FLAGS },
1481 { dispatch_cgi, CF_IGNORE_FORCE},
1485 /* Light version, used after tags are applied */
1486 static const struct cruncher crunchers_light[] = {
1487 { block_url, CF_COUNT_AS_REJECT },
1488 { redirect_url, CF_NO_FLAGS },
1494 * XXX: Don't we really mean
1500 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1501 /*********************************************************************
1503 * Function : sig_handler
1505 * Description : Signal handler for different signals.
1506 * Exit gracefully on TERM and INT
1507 * or set a flag that will cause the errlog
1508 * to be reopened by the main thread on HUP.
1511 * 1 : the_signal = the signal cause this function to call
1515 *********************************************************************/
1516 static void sig_handler(int the_signal)
1522 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1534 received_hup_signal = 1;
1540 * We shouldn't be here, unless we catch signals
1541 * in main() that we can't handle here!
1543 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1551 /*********************************************************************
1553 * Function : client_protocol_is_unsupported
1555 * Description : Checks if the client used a known unsupported
1556 * protocol and deals with it by sending an error
1560 * 1 : csp = Current client state (buffers, headers, etc...)
1561 * 2 : req = the first request line send by the client
1563 * Returns : TRUE if an error response has been generated, or
1564 * FALSE if the request doesn't look invalid.
1566 *********************************************************************/
1567 static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1570 * If it's a FTP or gopher request, we don't support it.
1572 * These checks are better than nothing, but they might
1573 * not work in all configurations and some clients might
1574 * have problems digesting the answer.
1576 * They should, however, never cause more problems than
1577 * Privoxy's old behaviour (returning the misleading HTML
1580 * "Could not resolve http://(ftp|gopher)://example.org").
1582 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1584 const char *response = NULL;
1585 const char *protocol = NULL;
1587 if (!strncmpic(req, "GET ftp://", 10))
1589 response = FTP_RESPONSE;
1594 response = GOPHER_RESPONSE;
1595 protocol = "GOPHER";
1597 log_error(LOG_LEVEL_ERROR,
1598 "%s tried to use Privoxy as %s proxy: %s",
1599 csp->ip_addr_str, protocol, req);
1600 log_error(LOG_LEVEL_CLF,
1601 "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1603 write_socket(csp->cfd, response, strlen(response));
1612 /*********************************************************************
1614 * Function : get_request_destination_elsewhere
1616 * Description : If the client's request was redirected into
1617 * Privoxy without the client's knowledge,
1618 * the request line lacks the destination host.
1620 * This function tries to get it elsewhere,
1621 * provided accept-intercepted-requests is enabled.
1623 * "Elsewhere" currently only means "Host: header",
1624 * but in the future we may ask the redirecting
1625 * packet filter to look the destination up.
1627 * If the destination stays unknown, an error
1628 * response is send to the client and headers
1629 * are freed so that chat() can return directly.
1632 * 1 : csp = Current client state (buffers, headers, etc...)
1633 * 2 : headers = a header list
1635 * Returns : JB_ERR_OK if the destination is now known, or
1636 * JB_ERR_PARSE if it isn't.
1638 *********************************************************************/
1639 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1643 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1645 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1646 " Privoxy isn't configured to accept intercepted requests.",
1647 csp->ip_addr_str, csp->http->cmd);
1648 /* XXX: Use correct size */
1649 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1650 csp->ip_addr_str, csp->http->cmd);
1652 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1653 destroy_list(headers);
1655 return JB_ERR_PARSE;
1657 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1659 /* Split the domain we just got for pattern matching */
1660 init_domain_components(csp->http);
1666 /* We can't work without destination. Go spread the news.*/
1668 req = list_to_text(headers);
1670 /* XXX: Use correct size */
1671 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1672 csp->ip_addr_str, csp->http->cmd);
1673 log_error(LOG_LEVEL_ERROR,
1674 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1675 csp->ip_addr_str, csp->http->cmd, req);
1678 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
1679 destroy_list(headers);
1681 return JB_ERR_PARSE;
1684 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1685 * to get the destination IP address, use it as host directly
1686 * or do a reverse DNS lookup first.
1691 /*********************************************************************
1693 * Function : get_server_headers
1695 * Description : Parses server headers in iob and fills them
1696 * into csp->headers so that they can later be
1700 * 1 : csp = Current client state (buffers, headers, etc...)
1702 * Returns : JB_ERR_OK if everything went fine, or
1703 * JB_ERR_PARSE if the headers were incomplete.
1705 *********************************************************************/
1706 static jb_err get_server_headers(struct client_state *csp)
1708 int continue_hack_in_da_house = 0;
1711 while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
1716 * continue hack in da house. Ignore the ending of
1717 * this head and continue enlisting header lines.
1718 * The reason is described below.
1720 enlist(csp->headers, "");
1721 continue_hack_in_da_house = 0;
1724 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1727 * It's a bodyless continue response, don't
1728 * stop header parsing after reaching its end.
1730 * As a result Privoxy will concatenate the
1731 * next response's head and parse and deliver
1732 * the headers as if they belonged to one request.
1734 * The client will separate them because of the
1735 * empty line between them.
1737 * XXX: What we're doing here is clearly against
1738 * the intended purpose of the continue header,
1739 * and under some conditions (HTTP/1.0 client request)
1740 * it's a standard violation.
1742 * Anyway, "sort of against the spec" is preferable
1743 * to "always getting confused by Continue responses"
1744 * (Privoxy's behaviour before this hack was added)
1746 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1747 continue_hack_in_da_house = 1;
1749 else if (*header == '\0')
1752 * If the header is empty, but the Continue hack
1753 * isn't active, we can assume that we reached the
1754 * end of the buffer before we hit the end of the
1757 * Inform the caller an let it decide how to handle it.
1759 return JB_ERR_PARSE;
1762 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1765 * XXX: Should we quit the request and return a
1766 * out of memory error page instead?
1768 log_error(LOG_LEVEL_ERROR,
1769 "Out of memory while enlisting server headers. %s lost.",
1779 /*********************************************************************
1781 * Function : crunch_reason
1783 * Description : Translates the crunch reason code into a string.
1786 * 1 : rsp = a http_response
1788 * Returns : A string with the crunch reason or an error description.
1790 *********************************************************************/
1791 static const char *crunch_reason(const struct http_response *rsp)
1793 char * reason = NULL;
1795 assert(rsp != NULL);
1798 return "Internal error while searching for crunch reason";
1801 switch (rsp->reason)
1803 case RSP_REASON_UNSUPPORTED:
1804 reason = "Unsupported HTTP feature";
1806 case RSP_REASON_BLOCKED:
1809 case RSP_REASON_UNTRUSTED:
1810 reason = "Untrusted";
1812 case RSP_REASON_REDIRECTED:
1813 reason = "Redirected";
1815 case RSP_REASON_CGI_CALL:
1816 reason = "CGI Call";
1818 case RSP_REASON_NO_SUCH_DOMAIN:
1819 reason = "DNS failure";
1821 case RSP_REASON_FORWARDING_FAILED:
1822 reason = "Forwarding failed";
1824 case RSP_REASON_CONNECT_FAILED:
1825 reason = "Connection failure";
1827 case RSP_REASON_OUT_OF_MEMORY:
1828 reason = "Out of memory (may mask other reasons)";
1831 reason = "No reason recorded";
1839 /*********************************************************************
1841 * Function : send_crunch_response
1843 * Description : Delivers already prepared response for
1844 * intercepted requests, logs the interception
1845 * and frees the response.
1848 * 1 : csp = Current client state (buffers, headers, etc...)
1849 * 1 : rsp = Fully prepared response. Will be freed on exit.
1851 * Returns : Nothing.
1853 *********************************************************************/
1854 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp)
1856 const struct http_request *http = csp->http;
1857 char status_code[4];
1859 assert(rsp != NULL);
1860 assert(rsp->head != NULL);
1865 * Not supposed to happen. If it does
1866 * anyway, treat it as an unknown error.
1868 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1869 /* return code doesn't matter */
1874 /* If rsp is still NULL, we have serious internal problems. */
1875 log_error(LOG_LEVEL_FATAL,
1876 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1880 * Extract the status code from the actual head
1881 * that was send to the client. It is the only
1882 * way to get it right for all requests, including
1883 * the fixed ones for out-of-memory problems.
1885 * A head starts like this: 'HTTP/1.1 200...'
1889 status_code[0] = rsp->head[9];
1890 status_code[1] = rsp->head[10];
1891 status_code[2] = rsp->head[11];
1892 status_code[3] = '\0';
1894 /* Write the answer to the client */
1895 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1896 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1898 /* There is nothing we can do about it. */
1899 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1902 /* Log that the request was crunched and why. */
1903 log_error(LOG_LEVEL_CRUNCH, "%s: %s", crunch_reason(rsp), http->url);
1904 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %u",
1905 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1907 /* Clean up and return */
1908 if (cgi_error_memory() != rsp)
1910 free_http_response(rsp);
1917 /*********************************************************************
1919 * Function : request_contains_null_bytes
1921 * Description : Checks for NULL bytes in the request and sends
1922 * an error message to the client if any were found.
1924 * XXX: currently not used, see comment in chat().
1927 * 1 : csp = Current client state (buffers, headers, etc...)
1928 * 2 : buf = Data from the client's request to check.
1929 * 3 : len = The data length.
1931 * Returns : TRUE if the request contained one or more NULL bytes, or
1934 *********************************************************************/
1935 static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1937 size_t c_len; /* Request lenght when treated as C string */
1939 c_len = strlen(buf);
1944 * Null byte(s) found. Log the request,
1945 * return an error response and hang up.
1947 size_t tmp_len = c_len;
1952 * Replace NULL byte(s) with '°' characters
1953 * so the request can be logged as string.
1954 * XXX: Is there a better replacement character?
1957 tmp_len += strlen(buf+tmp_len);
1958 } while (tmp_len < len);
1960 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1961 "(length=%d, strlen=%u).", csp->ip_addr_str, len, c_len);
1962 log_error(LOG_LEVEL_HEADER,
1963 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1965 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
1967 /* XXX: Log correct size */
1968 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1978 /*********************************************************************
1980 * Function : crunch_response_triggered
1982 * Description : Checks if the request has to be crunched,
1983 * and delivers the crunch response if necessary.
1986 * 1 : csp = Current client state (buffers, headers, etc...)
1987 * 2 : crunchers = list of cruncher functions to run
1989 * Returns : TRUE if the request was answered with a crunch response
1992 *********************************************************************/
1993 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
1995 struct http_response *rsp = NULL;
1996 const struct cruncher *c;
1999 * If CGI request crunching is disabled,
2000 * check the CGI dispatcher out of order to
2001 * prevent unintentional blocks or redirects.
2003 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
2004 && (NULL != (rsp = dispatch_cgi(csp))))
2006 /* Deliver, log and free the interception response. */
2007 send_crunch_response(csp, rsp);
2011 for (c = crunchers; c->cruncher != NULL; c++)
2014 * Check the cruncher if either Privoxy is toggled
2015 * on and the request isn't forced, or if the cruncher
2016 * applies to forced requests as well.
2018 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
2019 !(csp->flags & CSP_FLAG_FORCED)) ||
2020 (c->flags & CF_IGNORE_FORCE))
2022 rsp = c->cruncher(csp);
2025 /* Deliver, log and free the interception response. */
2026 send_crunch_response(csp, rsp);
2027 #ifdef FEATURE_STATISTICS
2028 if (c->flags & CF_COUNT_AS_REJECT)
2030 csp->flags |= CSP_FLAG_REJECTED;
2032 #endif /* def FEATURE_STATISTICS */
2043 /*********************************************************************
2045 * Function : build_request_line
2047 * Description : Builds the HTTP request line.
2049 * If a HTTP forwarder is used it expects the whole URL,
2050 * web servers only get the path.
2053 * 1 : csp = Current client state (buffers, headers, etc...)
2054 * 2 : fwd = The forwarding spec used for the request
2055 * XXX: Should use http->fwd instead.
2056 * 3 : request_line = The old request line which will be replaced.
2058 * Returns : Nothing. Terminates in case of memory problems.
2060 *********************************************************************/
2061 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
2063 struct http_request *http = csp->http;
2065 assert(http->ssl == 0);
2068 * Downgrade http version from 1.1 to 1.0
2069 * if +downgrade action applies.
2071 if ( (csp->action->flags & ACTION_DOWNGRADE)
2072 && (!strcmpic(http->ver, "HTTP/1.1")))
2075 http->ver = strdup("HTTP/1.0");
2077 if (http->ver == NULL)
2079 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
2084 * Rebuild the request line.
2086 freez(*request_line);
2087 *request_line = strdup(http->gpc);
2088 string_append(request_line, " ");
2090 if (fwd->forward_host)
2092 string_append(request_line, http->url);
2096 string_append(request_line, http->path);
2098 string_append(request_line, " ");
2099 string_append(request_line, http->ver);
2101 if (*request_line == NULL)
2103 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
2105 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
2109 /*********************************************************************
2111 * Function : change_request_destination
2113 * Description : Parse a (rewritten) request line and regenerate
2114 * the http request data.
2117 * 1 : csp = Current client state (buffers, headers, etc...)
2119 * Returns : Forwards the parse_http_request() return code.
2120 * Terminates in case of memory problems.
2122 *********************************************************************/
2123 static jb_err change_request_destination(struct client_state *csp)
2125 struct http_request *http = csp->http;
2128 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
2129 free_http_request(http);
2130 err = parse_http_request(csp->headers->first->str, http);
2131 if (JB_ERR_OK != err)
2133 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
2134 jb_err_to_string(err));
2138 /* XXX: ocmd is a misleading name */
2139 http->ocmd = strdup(http->cmd);
2140 if (http->ocmd == NULL)
2142 log_error(LOG_LEVEL_FATAL,
2143 "Out of memory copying rewritten HTTP request line");
2151 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2152 /*********************************************************************
2154 * Function : server_response_is_complete
2156 * Description : Determines whether we should stop reading
2157 * from the server socket.
2160 * 1 : csp = Current client state (buffers, headers, etc...)
2161 * 2 : content_length = Length of content received so far.
2163 * Returns : TRUE if the response is complete,
2166 *********************************************************************/
2167 static int server_response_is_complete(struct client_state *csp,
2168 unsigned long long content_length)
2170 int content_length_known = !!(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
2172 if (!strcmpic(csp->http->gpc, "HEAD"))
2175 * "HEAD" implies no body, we are thus expecting
2176 * no content. XXX: incomplete "list" of methods?
2178 csp->expected_content_length = 0;
2179 content_length_known = TRUE;
2182 if (csp->http->status == 304)
2185 * Expect no body. XXX: incomplete "list" of status codes?
2187 csp->expected_content_length = 0;
2188 content_length_known = TRUE;
2191 return (content_length_known && ((0 == csp->expected_content_length)
2192 || (csp->expected_content_length <= content_length)));
2196 /*********************************************************************
2198 * Function : wait_for_alive_connections
2200 * Description : Waits for alive connections to timeout.
2206 *********************************************************************/
2207 static void wait_for_alive_connections()
2209 int connections_alive = close_unusable_connections();
2211 while (0 < connections_alive)
2213 log_error(LOG_LEVEL_CONNECT,
2214 "Waiting for %d connections to timeout.",
2217 connections_alive = close_unusable_connections();
2220 log_error(LOG_LEVEL_CONNECT, "No connections to wait for left.");
2223 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2226 /*********************************************************************
2228 * Function : mark_server_socket_tainted
2230 * Description : Makes sure we don't reuse a server socket
2231 * (if we didn't read everything the server sent
2232 * us reusing the socket would lead to garbage).
2235 * 1 : csp = Current client state (buffers, headers, etc...)
2239 *********************************************************************/
2240 static void mark_server_socket_tainted(struct client_state *csp)
2242 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
2244 log_error(LOG_LEVEL_CONNECT, "Unsetting keep-alive flag.");
2245 csp->flags &= ~CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE;
2249 /*********************************************************************
2251 * Function : get_request_line
2253 * Description : Read the client request line.
2256 * 1 : csp = Current client state (buffers, headers, etc...)
2258 * Returns : Pointer to request line or NULL in case of errors.
2260 *********************************************************************/
2261 static char *get_request_line(struct client_state *csp)
2263 char buf[BUFFER_SIZE];
2264 char *request_line = NULL;
2267 memset(buf, 0, sizeof(buf));
2271 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
2273 log_error(LOG_LEVEL_ERROR,
2274 "Stopped waiting for the request line.");
2275 write_socket(csp->cfd, CONNECTION_TIMEOUT_RESPONSE,
2276 strlen(CONNECTION_TIMEOUT_RESPONSE));
2280 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2282 if (len <= 0) return NULL;
2285 * If there is no memory left for buffering the
2286 * request, there is nothing we can do but hang up
2288 if (add_to_iob(csp, buf, len))
2293 request_line = get_header(csp->iob);
2295 } while ((NULL != request_line) && ('\0' == *request_line));
2297 return request_line;
2302 /*********************************************************************
2304 * Function : receive_client_request
2306 * Description : Read the client's request (more precisely the
2307 * client headers) and answer it if necessary.
2309 * Note that since we're not using select() we could get
2310 * blocked here if a client connected, then didn't say
2314 * 1 : csp = Current client state (buffers, headers, etc...)
2316 * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
2318 *********************************************************************/
2319 static jb_err receive_client_request(struct client_state *csp)
2321 char buf[BUFFER_SIZE];
2324 struct http_request *http;
2328 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
2329 struct list header_list;
2330 struct list *headers = &header_list;
2334 memset(buf, 0, sizeof(buf));
2336 req = get_request_line(csp);
2339 return JB_ERR_PARSE;
2341 assert(*req != '\0');
2343 if (client_protocol_is_unsupported(csp, req))
2345 return JB_ERR_PARSE;
2348 #ifdef FEATURE_FORCE_LOAD
2350 * If this request contains the FORCE_PREFIX and blocks
2351 * aren't enforced, get rid of it and set the force flag.
2353 if (strstr(req, FORCE_PREFIX))
2355 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
2357 log_error(LOG_LEVEL_FORCE,
2358 "Ignored force prefix in request: \"%s\".", req);
2362 strclean(req, FORCE_PREFIX);
2363 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
2364 csp->flags |= CSP_FLAG_FORCED;
2367 #endif /* def FEATURE_FORCE_LOAD */
2369 err = parse_http_request(req, http);
2371 if (JB_ERR_OK != err)
2373 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
2374 /* XXX: Use correct size */
2375 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2376 log_error(LOG_LEVEL_ERROR,
2377 "Couldn't parse request line received from %s: %s",
2378 csp->ip_addr_str, jb_err_to_string(err));
2380 free_http_request(http);
2381 return JB_ERR_PARSE;
2384 /* grab the rest of the client's headers */
2388 p = get_header(csp->iob);
2392 /* There are no additional headers to read. */
2399 * We didn't receive a complete header
2400 * line yet, get the rest of it.
2402 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
2404 log_error(LOG_LEVEL_ERROR,
2405 "Stopped grabbing the client headers.");
2406 return JB_ERR_PARSE;
2409 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2412 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
2413 destroy_list(headers);
2414 return JB_ERR_PARSE;
2417 if (add_to_iob(csp, buf, len))
2420 * If there is no memory left for buffering the
2421 * request, there is nothing we can do but hang up
2423 destroy_list(headers);
2424 return JB_ERR_MEMORY;
2430 * We were able to read a complete
2431 * header and can finaly enlist it.
2438 if (http->host == NULL)
2441 * If we still don't know the request destination,
2442 * the request is invalid or the client uses
2443 * Privoxy without its knowledge.
2445 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
2448 * Our attempts to get the request destination
2449 * elsewhere failed or Privoxy is configured
2450 * to only accept proxy requests.
2452 * An error response has already been send
2453 * and we're done here.
2455 return JB_ERR_PARSE;
2460 * Determine the actions for this URL
2462 #ifdef FEATURE_TOGGLE
2463 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
2465 /* Most compatible set of actions (i.e. none) */
2466 init_current_action(csp->action);
2469 #endif /* ndef FEATURE_TOGGLE */
2471 get_url_actions(csp, http);
2475 * Save a copy of the original request for logging
2477 http->ocmd = strdup(http->cmd);
2478 if (http->ocmd == NULL)
2480 log_error(LOG_LEVEL_FATAL,
2481 "Out of memory copying HTTP request line");
2483 enlist(csp->headers, http->cmd);
2485 /* Append the previously read headers */
2486 list_append_list_unique(csp->headers, headers);
2487 destroy_list(headers);
2494 /*********************************************************************
2496 * Function : parse_client_request
2498 * Description : Parses the client's request and decides what to do
2501 * Note that since we're not using select() we could get
2502 * blocked here if a client connected, then didn't say
2506 * 1 : csp = Current client state (buffers, headers, etc...)
2508 * Returns : JB_ERR_OK or JB_ERR_PARSE
2510 *********************************************************************/
2511 static jb_err parse_client_request(struct client_state *csp)
2513 struct http_request *http = csp->http;
2516 err = sed(csp, FILTER_CLIENT_HEADERS);
2517 if (JB_ERR_OK != err)
2519 /* XXX: Should be handled in sed(). */
2520 assert(err == JB_ERR_PARSE);
2521 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers.");
2523 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2525 /* Check request line for rewrites. */
2526 if ((NULL == csp->headers->first->str)
2527 || (strcmp(http->cmd, csp->headers->first->str) &&
2528 (JB_ERR_OK != change_request_destination(csp))))
2531 * A header filter broke the request line - bail out.
2533 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
2534 /* XXX: Use correct size */
2535 log_error(LOG_LEVEL_CLF,
2536 "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
2537 log_error(LOG_LEVEL_ERROR,
2538 "Invalid request line after applying header filters.");
2539 free_http_request(http);
2541 return JB_ERR_PARSE;
2549 /*********************************************************************
2553 * Description : Once a connection to the client has been accepted,
2554 * this function is called (via serve()) to handle the
2555 * main business of the communication. When this
2556 * function returns, the caller must close the client
2559 * FIXME: chat is nearly thousand lines long.
2563 * 1 : csp = Current client state (buffers, headers, etc...)
2565 * Returns : Nothing.
2567 *********************************************************************/
2568 static void chat(struct client_state *csp)
2570 char buf[BUFFER_SIZE];
2577 int ms_iis5_hack = 0;
2578 unsigned long long byte_count = 0;
2579 int forwarded_connect_retries = 0;
2580 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
2581 const struct forward_spec *fwd;
2582 struct http_request *http;
2583 int len = 0; /* for buffer sizes (and negative error codes) */
2585 /* Function that does the content filtering for the current request */
2586 filter_function_ptr content_filter = NULL;
2588 /* Skeleton for HTTP response, if we should intercept the request */
2589 struct http_response *rsp;
2590 struct timeval timeout;
2592 memset(buf, 0, sizeof(buf));
2593 memset(&timeout, 0, sizeof(timeout));
2594 timeout.tv_sec = csp->config->socket_timeout;
2598 if (receive_client_request(csp) != JB_ERR_OK)
2602 if (parse_client_request(csp) != JB_ERR_OK)
2607 /* decide how to route the HTTP request */
2608 fwd = forward_url(csp, http);
2611 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
2612 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2617 * build the http request to send to the server
2618 * we have to do one of the following:
2620 * create = use the original HTTP request to create a new
2621 * HTTP request that has either the path component
2622 * without the http://domainspec (w/path) or the
2623 * full orininal URL (w/url)
2624 * Note that the path and/or the HTTP version may
2625 * have been altered by now.
2627 * connect = Open a socket to the host:port of the server
2628 * and short-circuit server and client socket.
2630 * pass = Pass the request unchanged if forwarding a CONNECT
2631 * request to a parent proxy. Note that we'll be sending
2632 * the CFAIL message ourselves if connecting to the parent
2633 * fails, but we won't send a CSUCCEED message if it works,
2634 * since that would result in a double message (ours and the
2635 * parent's). After sending the request to the parent, we simply
2638 * here's the matrix:
2641 * +--------+--------+
2643 * 0 | create | connect|
2645 * Forwarding +--------+--------+
2647 * 1 | create | pass |
2649 * +--------+--------+
2653 if (http->ssl && connect_port_is_forbidden(csp))
2655 const char *acceptable_connect_ports =
2656 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
2657 assert(NULL != acceptable_connect_ports);
2658 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
2659 "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
2660 csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
2661 csp->action->flags |= ACTION_BLOCK;
2667 freez(csp->headers->first->str);
2668 build_request_line(csp, fwd, &csp->headers->first->str);
2672 * We have a request. Check if one of the crunchers wants it.
2674 if (crunch_response_triggered(csp, crunchers_all))
2677 * Yes. The client got the crunch response
2678 * and we are done here after cleaning up.
2680 /* XXX: why list_remove_all()? */
2681 list_remove_all(csp->headers);
2686 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2688 if (fwd->forward_host)
2690 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2691 fwd->forward_host, fwd->forward_port, http->hostport);
2695 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2698 /* here we connect to the server, gateway, or the forwarder */
2700 while ((csp->sfd = forwarded_connect(fwd, http, csp))
2701 && (errno == EINVAL)
2702 && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2704 log_error(LOG_LEVEL_ERROR,
2705 "failed request #%u to connect to %s. Trying again.",
2706 forwarded_connect_retries, http->hostport);
2709 if (csp->sfd == JB_INVALID_SOCKET)
2711 if (fwd->type != SOCKS_NONE)
2714 rsp = error_response(csp, "forwarding-failed", errno);
2716 else if (errno == EINVAL)
2718 rsp = error_response(csp, "no-such-domain", errno);
2722 rsp = error_response(csp, "connect-failed", errno);
2723 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2727 /* Write the answer to the client */
2730 send_crunch_response(csp, rsp);
2736 hdr = list_to_text(csp->headers);
2739 /* FIXME Should handle error properly */
2740 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2742 list_remove_all(csp->headers);
2744 if (fwd->forward_host || (http->ssl == 0))
2747 * Write the client's (modified) header to the server
2748 * (along with anything else that may be in the buffer)
2750 if (write_socket(csp->sfd, hdr, strlen(hdr))
2751 || (flush_socket(csp->sfd, csp->iob) < 0))
2753 log_error(LOG_LEVEL_CONNECT,
2754 "write header to: %s failed: %E", http->hostport);
2756 rsp = error_response(csp, "connect-failed", errno);
2759 send_crunch_response(csp, rsp);
2769 * We're running an SSL tunnel and we're not forwarding,
2770 * so just send the "connect succeeded" message to the
2771 * client, flush the rest, and get out of the way.
2773 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
2781 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2783 /* we're finished with the client's header */
2786 maxfd = (csp->cfd > csp->sfd) ? csp->cfd : csp->sfd;
2788 /* pass data between the client and server
2789 * until one or the other shuts down the connection.
2798 * FD_ZERO here seems to point to an errant macro which crashes.
2799 * So do this by hand for now...
2801 memset(&rfds,0x00,sizeof(fd_set));
2805 FD_SET(csp->cfd, &rfds);
2806 FD_SET(csp->sfd, &rfds);
2808 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2809 if ((csp->flags & CSP_FLAG_CHUNKED)
2810 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
2811 && ((csp->iob->eod - csp->iob->cur) >= 5)
2812 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
2814 log_error(LOG_LEVEL_CONNECT,
2815 "Looks like we read the last chunk together with "
2816 "the server headers. We better stop reading.");
2817 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
2818 csp->expected_content_length = byte_count;
2819 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2821 if (server_body && server_response_is_complete(csp, byte_count))
2823 log_error(LOG_LEVEL_CONNECT,
2824 "Done reading from server. Expected content length: %llu. "
2825 "Actual content length: %llu. Most recently received: %d.",
2826 csp->expected_content_length, byte_count, len);
2829 * XXX: should not jump around,
2830 * chat() is complicated enough already.
2834 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2836 n = select((int)maxfd+1, &rfds, NULL, NULL, &timeout);
2840 log_error(LOG_LEVEL_ERROR,
2841 "Didn't receive data in time: %s", http->url);
2842 if ((byte_count == 0) && (http->ssl == 0))
2844 write_socket(csp->cfd, CONNECTION_TIMEOUT_RESPONSE,
2845 strlen(CONNECTION_TIMEOUT_RESPONSE));
2847 mark_server_socket_tainted(csp);
2852 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2853 mark_server_socket_tainted(csp);
2858 * This is the body of the browser's request,
2859 * just read and write it.
2861 if (FD_ISSET(csp->cfd, &rfds))
2863 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2867 /* XXX: not sure if this is necessary. */
2868 mark_server_socket_tainted(csp);
2869 break; /* "game over, man" */
2872 if (write_socket(csp->sfd, buf, (size_t)len))
2874 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2875 mark_server_socket_tainted(csp);
2882 * The server wants to talk. It could be the header or the body.
2883 * If `hdr' is null, then it's the header otherwise it's the body.
2884 * FIXME: Does `hdr' really mean `host'? No.
2886 if (FD_ISSET(csp->sfd, &rfds))
2889 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2893 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2895 if (http->ssl && (fwd->forward_host == NULL))
2898 * Just hang up. We already confirmed the client's CONNECT
2899 * request with status code 200 and unencrypted content is
2900 * no longer welcome.
2902 log_error(LOG_LEVEL_ERROR,
2903 "CONNECT already confirmed. Unable to tell the client about the problem.");
2906 else if (byte_count)
2909 * Just hang up. We already transmitted the original headers
2910 * and parts of the original content and therefore missed the
2911 * chance to send an error message (without risking data corruption).
2913 * XXX: we could retry with a fancy range request here.
2915 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2916 "Unable to tell the client about the problem.");
2917 mark_server_socket_tainted(csp);
2921 rsp = error_response(csp, "connect-failed", errno);
2924 send_crunch_response(csp, rsp);
2930 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2931 if (csp->flags & CSP_FLAG_CHUNKED)
2933 if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2935 /* XXX: this is a temporary hack */
2936 log_error(LOG_LEVEL_CONNECT,
2937 "Looks like we reached the end of the last chunk. "
2938 "We better stop reading.");
2939 csp->expected_content_length = byte_count + (unsigned long long)len;
2940 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2944 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2947 * Add a trailing zero to let be able to use string operations.
2948 * XXX: do we still need this with filter_popups gone?
2953 * Normally, this would indicate that we've read
2954 * as much as the server has sent us and we can
2955 * close the client connection. However, Microsoft
2956 * in its wisdom has released IIS/5 with a bug that
2957 * prevents it from sending the trailing \r\n in
2958 * a 302 redirect header (and possibly other headers).
2959 * To work around this if we've haven't parsed
2960 * a full header we'll append a trailing \r\n
2961 * and see if this now generates a valid one.
2963 * This hack shouldn't have any impacts. If we've
2964 * already transmitted the header or if this is a
2965 * SSL connection, then we won't bother with this
2966 * hack. So we only work on partially received
2967 * headers. If we append a \r\n and this still
2968 * doesn't generate a valid header, then we won't
2969 * transmit anything to the client.
2974 if (server_body || http->ssl)
2977 * If we have been buffering up the document,
2978 * now is the time to apply content modification
2979 * and send the result to the client.
2983 p = execute_content_filter(csp, content_filter);
2985 * If the content filter fails, use the original
2986 * buffer and length.
2987 * (see p != NULL ? p : csp->iob->cur below)
2991 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2994 if (JB_ERR_OK != update_server_headers(csp))
2996 log_error(LOG_LEVEL_FATAL,
2997 "Failed to update server headers. after filtering.");
3000 hdr = list_to_text(csp->headers);
3003 /* FIXME Should handle error properly */
3004 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3007 if (write_socket(csp->cfd, hdr, strlen(hdr))
3008 || write_socket(csp->cfd,
3009 ((p != NULL) ? p : csp->iob->cur), (size_t)csp->content_length))
3011 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
3014 mark_server_socket_tainted(csp);
3022 break; /* "game over, man" */
3026 * This is NOT the body, so
3027 * Let's pretend the server just sent us a blank line.
3029 snprintf(buf, sizeof(buf), "\r\n");
3030 len = (int)strlen(buf);
3033 * Now, let the normal header parsing algorithm below do its
3034 * job. If it fails, we'll exit instead of continuing.
3041 * If this is an SSL connection or we're in the body
3042 * of the server document, just write it to the client,
3043 * unless we need to buffer the body for later content-filtering
3045 if (server_body || http->ssl)
3050 * If there is no memory left for buffering the content, or the buffer limit
3051 * has been reached, switch to non-filtering mode, i.e. make & write the
3052 * header, flush the iob and buf, and get out of the way.
3054 if (add_to_iob(csp, buf, len))
3059 log_error(LOG_LEVEL_INFO,
3060 "Flushing header and buffers. Stepping back from filtering.");
3062 hdr = list_to_text(csp->headers);
3066 * Memory is too tight to even generate the header.
3067 * Send our static "Out-of-memory" page.
3069 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
3070 rsp = cgi_error_memory();
3071 send_crunch_response(csp, rsp);
3072 mark_server_socket_tainted(csp);
3075 hdrlen = strlen(hdr);
3077 if (write_socket(csp->cfd, hdr, hdrlen)
3078 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
3079 || (write_socket(csp->cfd, buf, (size_t)len)))
3081 log_error(LOG_LEVEL_CONNECT,
3082 "Flush header and buffers to client failed: %E");
3084 mark_server_socket_tainted(csp);
3089 * Reset the byte_count to the amount of bytes
3090 * we just flushed. len will be added a few lines below,
3091 * hdrlen doesn't matter for LOG_LEVEL_CLF.
3093 byte_count = (unsigned long long)flushed;
3095 content_filter = NULL;
3101 if (write_socket(csp->cfd, buf, (size_t)len))
3103 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
3104 mark_server_socket_tainted(csp);
3108 byte_count += (unsigned long long)len;
3113 const char *header_start;
3115 * We're still looking for the end of the server's header.
3116 * Buffer up the data we just read. If that fails, there's
3117 * little we can do but send our static out-of-memory page.
3119 if (add_to_iob(csp, buf, len))
3121 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
3122 rsp = cgi_error_memory();
3123 send_crunch_response(csp, rsp);
3124 mark_server_socket_tainted(csp);
3128 header_start = csp->iob->cur;
3130 /* Convert iob into something sed() can digest */
3131 if (JB_ERR_PARSE == get_server_headers(csp))
3136 * Well, we tried our MS IIS/5 hack and it didn't work.
3137 * The header is incomplete and there isn't anything
3138 * we can do about it.
3140 log_error(LOG_LEVEL_INFO,
3141 "MS IIS5 hack didn't produce valid headers.");
3147 * Since we have to wait for more from the server before
3148 * we can parse the headers we just continue here.
3150 int header_offset = csp->iob->cur - header_start;
3151 assert(csp->iob->cur >= header_start);
3152 byte_count += (unsigned long long)(len - header_offset);
3153 log_error(LOG_LEVEL_CONNECT, "Continuing buffering headers. "
3154 "byte_count: %llu. header_offset: %d. len: %d.",
3155 byte_count, header_offset, len);
3160 /* Did we actually get anything? */
3161 if (NULL == csp->headers->first)
3163 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
3164 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3165 write_socket(csp->cfd, NO_SERVER_DATA_RESPONSE, strlen(NO_SERVER_DATA_RESPONSE));
3166 free_http_request(http);
3167 mark_server_socket_tainted(csp);
3171 assert(csp->headers->first->str);
3173 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
3174 strncmpic(csp->headers->first->str, "ICY", 3))
3177 * It doesn't look like a HTTP (or Shoutcast) response:
3178 * tell the client and log the problem.
3180 if (strlen(csp->headers->first->str) > 30)
3182 csp->headers->first->str[30] = '\0';
3184 log_error(LOG_LEVEL_ERROR,
3185 "Invalid server or forwarder response. Starts with: %s",
3186 csp->headers->first->str);
3187 log_error(LOG_LEVEL_CLF,
3188 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3189 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
3190 strlen(INVALID_SERVER_HEADERS_RESPONSE));
3191 free_http_request(http);
3192 mark_server_socket_tainted(csp);
3197 * We have now received the entire server header,
3198 * filter it and send the result to the client
3200 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
3202 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
3204 hdr = list_to_text(csp->headers);
3207 /* FIXME Should handle error properly */
3208 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3211 if (crunch_response_triggered(csp, crunchers_light))
3214 * One of the tags created by a server-header
3215 * tagger triggered a crunch. We already
3216 * delivered the crunch response to the client
3217 * and are done here after cleaning up.
3220 mark_server_socket_tainted(csp);
3223 /* Buffer and pcrs filter this if appropriate. */
3225 if (!http->ssl) /* We talk plaintext */
3227 content_filter = get_filter_function(csp);
3230 * Only write if we're not buffering for content modification
3232 if (!content_filter)
3235 * Write the server's (modified) header to
3236 * the client (along with anything else that
3237 * may be in the buffer)
3240 if (write_socket(csp->cfd, hdr, strlen(hdr))
3241 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
3243 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
3246 * The write failed, so don't bother mentioning it
3247 * to the client... it probably can't hear us anyway.
3250 mark_server_socket_tainted(csp);
3254 byte_count += (unsigned long long)len;
3259 * XXX: the header lenght should probably
3260 * be calculated by get_server_headers().
3262 int header_length = csp->iob->cur - header_start;
3263 assert(csp->iob->cur > header_start);
3264 byte_count += (unsigned long long)(len - header_length);
3267 /* we're finished with the server's header */
3273 * If this was a MS IIS/5 hack then it means the server
3274 * has already closed the connection. Nothing more to read.
3279 log_error(LOG_LEVEL_INFO,
3280 "Closed server connection detected with MS IIS5 hack enabled.");
3286 mark_server_socket_tainted(csp);
3287 return; /* huh? we should never get here */
3290 if (csp->content_length == 0)
3293 * If Privoxy didn't recalculate the Content-Lenght,
3294 * byte_count is still correct.
3296 csp->content_length = byte_count;
3299 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3300 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3301 && (csp->expected_content_length != byte_count))
3303 log_error(LOG_LEVEL_CONNECT,
3304 "Received %llu bytes while expecting %llu.",
3305 byte_count, csp->expected_content_length);
3306 mark_server_socket_tainted(csp);
3310 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %llu",
3311 csp->ip_addr_str, http->ocmd, csp->content_length);
3315 /*********************************************************************
3319 * Description : This is little more than chat. We only "serve" to
3320 * to close any socket that chat may have opened.
3323 * 1 : csp = Current client state (buffers, headers, etc...)
3327 *********************************************************************/
3329 void serve(struct client_state *csp)
3330 #else /* ifndef AMIGA */
3331 static void serve(struct client_state *csp)
3332 #endif /* def AMIGA */
3335 close_socket(csp->cfd);
3337 if (csp->sfd != JB_INVALID_SOCKET)
3339 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3340 static int monitor_thread_running = 0;
3342 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
3343 && (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
3345 remember_connection(csp->sfd, csp->http, forward_url(csp, csp->http));
3346 privoxy_mutex_lock(&connection_reuse_mutex);
3347 if (!monitor_thread_running)
3349 monitor_thread_running = 1;
3350 privoxy_mutex_unlock(&connection_reuse_mutex);
3351 wait_for_alive_connections();
3352 privoxy_mutex_lock(&connection_reuse_mutex);
3353 monitor_thread_running = 0;
3355 privoxy_mutex_unlock(&connection_reuse_mutex);
3359 forget_connection(csp->sfd);
3360 close_socket(csp->sfd);
3363 close_socket(csp->sfd);
3364 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3367 csp->flags &= ~CSP_FLAG_ACTIVE;
3373 /*********************************************************************
3375 * Function : server_thread
3377 * Description : We only exist to call `serve' in a threaded environment.
3380 * 1 : data = Current client state (buffers, headers, etc...)
3382 * Returns : Always 0.
3384 *********************************************************************/
3385 static int32 server_thread(void *data)
3387 serve((struct client_state *) data);
3394 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3395 /*********************************************************************
3399 * Description : Print usage info & exit.
3401 * Parameters : Pointer to argv[0] for identifying ourselves
3405 *********************************************************************/
3406 static void usage(const char *myname)
3408 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
3412 #endif /* defined(unix) */
3415 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
3416 #endif /* defined(unix) */
3417 "[--version] [configfile]\n"
3418 "Aborting\n", myname);
3423 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
3426 #ifdef MUTEX_LOCKS_AVAILABLE
3427 /*********************************************************************
3429 * Function : privoxy_mutex_lock
3431 * Description : Locks a mutex.
3434 * 1 : mutex = The mutex to lock.
3436 * Returns : Void. May exit in case of errors.
3438 *********************************************************************/
3439 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
3441 #ifdef FEATURE_PTHREAD
3442 int err = pthread_mutex_lock(mutex);
3445 if (mutex != &log_mutex)
3447 log_error(LOG_LEVEL_FATAL,
3448 "Mutex locking failed: %s.\n", strerror(err));
3453 EnterCriticalSection(mutex);
3454 #endif /* def FEATURE_PTHREAD */
3458 /*********************************************************************
3460 * Function : privoxy_mutex_unlock
3462 * Description : Unlocks a mutex.
3465 * 1 : mutex = The mutex to unlock.
3467 * Returns : Void. May exit in case of errors.
3469 *********************************************************************/
3470 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
3472 #ifdef FEATURE_PTHREAD
3473 int err = pthread_mutex_unlock(mutex);
3476 if (mutex != &log_mutex)
3478 log_error(LOG_LEVEL_FATAL,
3479 "Mutex unlocking failed: %s.\n", strerror(err));
3484 LeaveCriticalSection(mutex);
3485 #endif /* def FEATURE_PTHREAD */
3489 /*********************************************************************
3491 * Function : privoxy_mutex_init
3493 * Description : Prepares a mutex.
3496 * 1 : mutex = The mutex to initialize.
3498 * Returns : Void. May exit in case of errors.
3500 *********************************************************************/
3501 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
3503 #ifdef FEATURE_PTHREAD
3504 int err = pthread_mutex_init(mutex, 0);
3507 printf("Fatal error. Mutex initialization failed: %s.\n",
3512 InitializeCriticalSection(mutex);
3513 #endif /* def FEATURE_PTHREAD */
3515 #endif /* def MUTEX_LOCKS_AVAILABLE */
3517 /*********************************************************************
3519 * Function : initialize_mutexes
3521 * Description : Prepares mutexes if mutex support is available.
3525 * Returns : Void, exits in case of errors.
3527 *********************************************************************/
3528 static void initialize_mutexes(void)
3530 #ifdef MUTEX_LOCKS_AVAILABLE
3532 * Prepare global mutex semaphores
3534 privoxy_mutex_init(&log_mutex);
3535 privoxy_mutex_init(&log_init_mutex);
3536 privoxy_mutex_init(&connection_reuse_mutex);
3539 * XXX: The assumptions below are a bit naive
3540 * and can cause locks that aren't necessary.
3542 * For example older FreeBSD versions (< 6.x?)
3543 * have no gethostbyname_r, but gethostbyname is
3546 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
3547 privoxy_mutex_init(&resolver_mutex);
3548 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
3550 * XXX: should we use a single mutex for
3551 * localtime() and gmtime() as well?
3553 #ifndef HAVE_GMTIME_R
3554 privoxy_mutex_init(&gmtime_mutex);
3555 #endif /* ndef HAVE_GMTIME_R */
3557 #ifndef HAVE_LOCALTIME_R
3558 privoxy_mutex_init(&localtime_mutex);
3559 #endif /* ndef HAVE_GMTIME_R */
3562 privoxy_mutex_init(&rand_mutex);
3563 #endif /* ndef HAVE_RANDOM */
3564 #endif /* def MUTEX_LOCKS_AVAILABLE */
3568 /*********************************************************************
3572 * Description : Load the config file and start the listen loop.
3573 * This function is a lot more *sane* with the `load_config'
3574 * and `listen_loop' functions; although it stills does
3575 * a *little* too much for my taste.
3578 * 1 : argc = Number of parameters (including $0).
3579 * 2 : argv = Array of (char *)'s to the parameters.
3581 * Returns : 1 if : can't open config file, unrecognized directive,
3582 * stats requested in multi-thread mode, can't open the
3583 * log file, can't open the jar file, listen port is invalid,
3584 * any load fails, and can't bind port.
3586 * Else main never returns, the process must be signaled
3587 * to terminate execution. Or, on Windows, use the
3588 * "File", "Exit" menu option.
3590 *********************************************************************/
3592 int real_main(int argc, const char *argv[])
3594 int main(int argc, const char *argv[])
3598 unsigned int random_seed;
3600 struct passwd *pw = NULL;
3601 struct group *grp = NULL;
3604 char *pre_chroot_nslookup_to_load_resolver = NULL;
3611 #if !defined(_WIN32)
3618 /* Prepare mutexes if supported and necessary. */
3619 initialize_mutexes();
3621 /* Enable logging until further notice. */
3625 * Parse the command line arguments
3627 * XXX: simply printing usage information in case of
3628 * invalid arguments isn't particularly user friendly.
3630 while (++argc_pos < argc)
3633 /* Check to see if the service must be installed or uninstalled */
3634 if (strncmp(argv[argc_pos], "--install", 9) == 0)
3636 const char *pName = argv[argc_pos] + 9;
3639 exit( (install_service(pName)) ? 0 : 1 );
3641 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
3643 const char *pName = argv[argc_pos] + 11;
3646 exit((uninstall_service(pName)) ? 0 : 1);
3648 else if (strcmp(argv[argc_pos], "--service" ) == 0)
3650 bRunAsService = TRUE;
3651 w32_set_service_cwd();
3652 atexit(w32_service_exit_notify);
3655 #endif /* defined(_WIN32) */
3658 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3660 if (strcmp(argv[argc_pos], "--help") == 0)
3665 else if(strcmp(argv[argc_pos], "--version") == 0)
3667 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
3673 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
3678 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
3680 if (++argc_pos == argc) usage(argv[0]);
3681 pidfile = strdup(argv[argc_pos]);
3684 else if (strcmp(argv[argc_pos], "--user" ) == 0)
3686 if (++argc_pos == argc) usage(argv[argc_pos]);
3688 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
3691 if (NULL == (grp = getgrnam(p)))
3693 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
3697 if (NULL == (pw = getpwnam(argv[argc_pos])))
3699 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
3702 if (p != NULL) *--p = '\0';
3705 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
3707 if (++argc_pos == argc) usage(argv[0]);
3708 pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
3711 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
3715 #endif /* defined(unix) */
3717 else if (argc_pos + 1 != argc)
3720 * This is neither the last command line
3721 * option, nor was it recognized before,
3722 * therefore it must be invalid.
3728 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3730 configfile = argv[argc_pos];
3733 } /* -END- while (more arguments) */
3735 show_version(Argv[0]);
3738 if ( *configfile != '/' )
3740 char cwd[BUFFER_SIZE];
3742 size_t abs_file_size;
3744 /* make config-filename absolute here */
3745 if (NULL == getcwd(cwd, sizeof(cwd)))
3747 perror("failed to get current working directory");
3752 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3753 basedir = strdup(cwd);
3755 if (NULL == basedir ||
3756 NULL == (abs_file = malloc(abs_file_size)))
3758 perror("malloc failed");
3761 strlcpy(abs_file, basedir, abs_file_size);
3762 strlcat(abs_file, "/", abs_file_size );
3763 strlcat(abs_file, configfile, abs_file_size);
3764 configfile = abs_file;
3766 #endif /* defined unix */
3770 clients->next = NULL;
3772 /* XXX: factor out initialising after the next stable release. */
3775 #elif defined(_WIN32)
3779 random_seed = (unsigned int)time(NULL);
3781 srandom(random_seed);
3784 #endif /* ifdef HAVE_RANDOM */
3787 * Unix signal handling
3789 * Catch the abort, interrupt and terminate signals for a graceful exit
3790 * Catch the hangup signal so the errlog can be reopened.
3791 * Ignore the broken pipe signals (FIXME: Why?)
3793 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3796 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3797 const int ignored_signals[] = { SIGPIPE, 0 };
3799 for (idx = 0; catched_signals[idx] != 0; idx++)
3801 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3802 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3804 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3805 #endif /* ifdef sun */
3807 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3811 for (idx = 0; ignored_signals[idx] != 0; idx++)
3813 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3815 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3820 #else /* ifdef _WIN32 */
3821 # ifdef _WIN_CONSOLE
3823 * We *are* in a windows console app.
3824 * Print a verbose messages about FAQ's and such
3826 printf("%s", win32_blurb);
3827 # endif /* def _WIN_CONSOLE */
3828 #endif /* def _WIN32 */
3831 /* Initialize the CGI subsystem */
3832 cgi_init_error_messages();
3835 * If runnig on unix and without the --nodaemon
3836 * option, become a daemon. I.e. fork, detach
3837 * from tty and get process group leadership
3850 if ( pid < 0 ) /* error */
3855 else if ( pid != 0 ) /* parent */
3860 * must check for errors
3861 * child died due to missing files aso
3864 wpid = waitpid( pid, &status, WNOHANG );
3873 /* Should be more portable, but not as well tested */
3878 #else /* ndef __FreeBSD__ */
3880 #endif /* ndef __FreeBSD__ */
3881 fd = open("/dev/tty", O_RDONLY);
3884 /* no error check here */
3885 ioctl( fd, TIOCNOTTY,0 );
3890 * stderr (fd 2) will be closed later on, when the
3891 * log file has been parsed.
3898 } /* -END- if (!no_daemon) */
3901 * As soon as we have written the PID file, we can switch
3902 * to the user and group ID indicated by the --user option
3908 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3910 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3914 if (setgroups(1, &grp->gr_gid))
3916 log_error(LOG_LEVEL_FATAL, "setgroups() failed: %E");
3919 else if (initgroups(pw->pw_name, pw->pw_gid))
3921 log_error(LOG_LEVEL_FATAL, "initgroups() failed: %E");
3927 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3929 /* Read the time zone file from /etc before doing chroot. */
3931 if (NULL != pre_chroot_nslookup_to_load_resolver
3932 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3934 /* Initialize resolver library. */
3935 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3937 if (chroot(pw->pw_dir) < 0)
3939 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3943 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3946 if (setuid(pw->pw_uid))
3948 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3952 char putenv_dummy[64];
3954 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3955 if (putenv(putenv_dummy) != 0)
3957 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3960 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3961 if (putenv(putenv_dummy) != 0)
3963 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3969 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3972 #endif /* defined unix */
3975 /* This will be FALSE unless the command line specified --service
3979 /* Yup, so now we must attempt to establish a connection
3980 * with the service dispatcher. This will only work if this
3981 * process was launched by the service control manager to
3982 * actually run as a service. If this isn't the case, i've
3983 * known it take around 30 seconds or so for the call to return.
3986 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3987 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3989 /* Service has run, and at this point is now being stopped, so just return */
3994 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3996 /* An error occurred. Usually it's because --service was wrongly specified
3997 * and we were unable to connect to the Service Control Dispatcher because
3998 * it wasn't expecting us and is therefore not listening.
4000 * For now, just continue below to call the listen_loop function.
4003 #endif /* def _WIN32 */
4013 /*********************************************************************
4015 * Function : bind_port_helper
4017 * Description : Bind the listen port. Handles logging, and aborts
4021 * 1 : config = Privoxy configuration. Specifies port
4024 * Returns : Port that was opened.
4026 *********************************************************************/
4027 static jb_socket bind_port_helper(struct configuration_spec * config)
4032 if (config->haddr == NULL)
4034 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
4039 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
4040 config->hport, config->haddr);
4043 result = bind_port(config->haddr, config->hport, &bfd);
4050 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
4051 "There may be another Privoxy or some other "
4052 "proxy running on port %d",
4053 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
4054 config->hport, config->hport);
4057 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
4058 "The hostname is not resolvable",
4059 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
4062 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
4063 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
4066 /* shouldn't get here */
4067 return JB_INVALID_SOCKET;
4070 config->need_bind = 0;
4077 /* Without this simple workaround we get this compiler warning from _beginthread
4078 * warning C4028: formal parameter 1 different from declaration
4080 void w32_service_listen_loop(void *p)
4084 #endif /* def _WIN32 */
4087 /*********************************************************************
4089 * Function : listen_loop
4091 * Description : bind the listen port and enter a "FOREVER" listening loop.
4097 *********************************************************************/
4098 static void listen_loop(void)
4100 struct client_state *csp = NULL;
4102 struct configuration_spec * config;
4104 config = load_config();
4106 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4108 * XXX: Should be relocated once it no
4109 * longer needs to emit log messages.
4111 initialize_reusable_connections();
4112 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4114 bfd = bind_port_helper(config);
4116 #ifdef FEATURE_GRACEFUL_TERMINATION
4117 while (!g_terminate)
4122 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
4123 while (waitpid(-1, NULL, WNOHANG) > 0)
4125 /* zombie children */
4127 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
4130 * Free data that was used by died threads
4136 * Re-open the errlog after HUP signal
4138 if (received_hup_signal)
4140 if (NULL != config->logfile)
4142 init_error_log(Argv[0], config->logfile);
4144 received_hup_signal = 0;
4148 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
4150 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
4154 csp->flags |= CSP_FLAG_ACTIVE;
4155 csp->sfd = JB_INVALID_SOCKET;
4157 csp->config = config = load_config();
4159 if ( config->need_bind )
4162 * Since we were listening to the "old port", we will not see
4163 * a "listen" param change until the next IJB request. So, at
4164 * least 1 more request must be made for us to find the new
4165 * setting. I am simply closing the old socket and binding the
4168 * Which-ever is correct, we will serve 1 more page via the
4169 * old settings. This should probably be a "show-proxy-args"
4170 * request. This should not be a so common of an operation
4171 * that this will hurt people's feelings.
4176 bfd = bind_port_helper(config);
4179 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
4181 if (!accept_connection(csp, bfd))
4183 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
4196 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
4199 #ifdef FEATURE_TOGGLE
4200 if (global_toggle_state)
4201 #endif /* def FEATURE_TOGGLE */
4203 csp->flags |= CSP_FLAG_TOGGLED_ON;
4206 if (run_loader(csp))
4208 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
4209 /* Never get here - LOG_LEVEL_FATAL causes program exit */
4213 if (block_acl(NULL,csp))
4215 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
4216 close_socket(csp->cfd);
4220 #endif /* def FEATURE_ACL */
4222 /* add it to the list of clients */
4223 csp->next = clients->next;
4224 clients->next = csp;
4226 if (config->multi_threaded)
4230 /* this is a switch () statment in the C preprocessor - ugh */
4231 #undef SELECTED_ONE_OPTION
4233 /* Use Pthreads in preference to native code */
4234 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
4235 #define SELECTED_ONE_OPTION
4237 pthread_t the_thread;
4238 pthread_attr_t attrs;
4240 pthread_attr_init(&attrs);
4241 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
4242 errno = pthread_create(&the_thread, &attrs,
4243 (void * (*)(void *))serve, csp);
4244 child_id = errno ? -1 : 0;
4245 pthread_attr_destroy(&attrs);
4249 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
4250 #define SELECTED_ONE_OPTION
4251 child_id = _beginthread(
4252 (void (*)(void *))serve,
4257 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
4258 #define SELECTED_ONE_OPTION
4259 child_id = _beginthread(
4260 (void(* _Optlink)(void*))serve,
4266 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
4267 #define SELECTED_ONE_OPTION
4269 thread_id tid = spawn_thread
4270 (server_thread, "server", B_NORMAL_PRIORITY, csp);
4272 if ((tid >= 0) && (resume_thread(tid) == B_OK))
4274 child_id = (int) tid;
4283 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
4284 #define SELECTED_ONE_OPTION
4285 csp->cfd = ReleaseSocket(csp->cfd, -1);
4288 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4289 NP_Output, Output(),
4290 NP_CloseOutput, FALSE,
4291 NP_Name, (ULONG)"privoxy child",
4295 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4296 NP_Output, Output(),
4297 NP_CloseOutput, FALSE,
4298 NP_Name, (ULONG)"privoxy child",
4299 NP_StackSize, 200*1024,
4305 ((struct Task *)child_id)->tc_UserData = csp;
4306 Signal((struct Task *)child_id, SIGF_SINGLE);
4311 #if !defined(SELECTED_ONE_OPTION)
4314 /* This block is only needed when using fork().
4315 * When using threads, the server thread was
4316 * created and run by the call to _beginthread().
4318 if (child_id == 0) /* child */
4321 #ifdef FEATURE_TOGGLE
4322 int inherited_toggle_state = global_toggle_state;
4323 #endif /* def FEATURE_TOGGLE */
4328 * If we've been toggled or we've blocked the request, tell Mom
4331 #ifdef FEATURE_TOGGLE
4332 if (inherited_toggle_state != global_toggle_state)
4334 rc |= RC_FLAG_TOGGLED;
4336 #endif /* def FEATURE_TOGGLE */
4338 #ifdef FEATURE_STATISTICS
4339 if (csp->flags & CSP_FLAG_REJECTED)
4341 rc |= RC_FLAG_BLOCKED;
4343 #endif /* ndef FEATURE_STATISTICS */
4347 else if (child_id > 0) /* parent */
4349 /* in a fork()'d environment, the parent's
4350 * copy of the client socket and the CSP
4354 #if !defined(_WIN32) && !defined(__CYGWIN__)
4356 wait( &child_status );
4359 * Evaluate child's return code: If the child has
4360 * - been toggled, toggle ourselves
4361 * - blocked its request, bump up the stats counter
4364 #ifdef FEATURE_TOGGLE
4365 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
4367 global_toggle_state = !global_toggle_state;
4369 #endif /* def FEATURE_TOGGLE */
4371 #ifdef FEATURE_STATISTICS
4373 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
4377 #endif /* def FEATURE_STATISTICS */
4379 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
4380 close_socket(csp->cfd);
4381 csp->flags &= ~CSP_FLAG_ACTIVE;
4385 #undef SELECTED_ONE_OPTION
4386 /* end of cpp switch () */
4388 if (child_id < 0) /* failed */
4390 char buf[BUFFER_SIZE];
4392 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
4394 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
4396 write_socket(csp->cfd, buf, strlen(buf));
4397 close_socket(csp->cfd);
4398 csp->flags &= ~CSP_FLAG_ACTIVE;
4409 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
4411 /* Clean up. Aim: free all memory (no leaks) */
4412 #ifdef FEATURE_GRACEFUL_TERMINATION
4414 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
4416 unload_current_config_file();
4417 unload_current_actions_file();
4418 unload_current_re_filterfile();
4419 #ifdef FEATURE_TRUST
4420 unload_current_trust_file();
4423 if (config->multi_threaded)
4430 } while ((clients->next != NULL) && (--i > 0));
4434 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
4445 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
4446 /* Cleanup - remove taskbar icon etc. */
4451 #endif /* FEATURE_GRACEFUL_TERMINATION */