1 const char jcc_rcs[] = "$Id: jcc.c,v 1.230 2009/03/07 13:09:17 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 1.230 2009/03/07 13:09:17 fabiankeil
37 * Change csp->expected_content and_csp->expected_content_length from
38 * size_t to unsigned long long to reduce the likelihood of integer
39 * overflows that would let us close the connection prematurely.
40 * Bug found while investigating #2669131, reported by cyberpatrol.
42 * Revision 1.229 2009/03/07 11:17:01 fabiankeil
43 * Fix compiler warning.
45 * Revision 1.228 2009/03/06 20:30:13 fabiankeil
46 * Log unsigned values as such.
48 * Revision 1.227 2009/03/02 19:18:11 fabiankeil
49 * Streamline parse_http_request()'s prototype. As
50 * cparser pointed out it doesn't actually use csp.
52 * Revision 1.226 2009/03/01 18:28:24 fabiankeil
53 * Help clang understand that we aren't dereferencing
56 * Revision 1.225 2009/02/19 18:09:32 fabiankeil
57 * Unbreak build without FEATURE_CONNECTION_KEEP_ALIVE.
60 * Revision 1.224 2009/02/14 15:32:04 fabiankeil
61 * Add the request URL to the timeout message in chat().
64 * Revision 1.223 2009/02/09 21:21:16 fabiankeil
65 * Now that init_log_module() is called earlier, call show_version()
66 * later on from main() directly so it doesn't get called for --help
69 * Revision 1.222 2009/02/08 12:56:51 fabiankeil
70 * Call initialize_mutexes() before init_log_module() again.
71 * Broken since r220, might be the cause of Lee's #2579448.
73 * Revision 1.221 2009/02/06 18:02:58 fabiankeil
74 * When dropping privileges, also give up membership in supplementary
75 * groups. Thanks to Matthias Drochner for reporting the problem,
76 * providing the initial patch and testing the final version.
78 * Revision 1.220 2009/02/04 18:29:07 fabiankeil
79 * Initialize the log module before parsing arguments.
80 * Thanks to Matthias Drochner for the report.
82 * Revision 1.219 2009/01/31 16:08:21 fabiankeil
83 * Remove redundant error check in receive_client_request().
85 * Revision 1.218 2009/01/31 12:25:54 fabiankeil
86 * Flatten indentation in receive_client_request().
88 * Revision 1.217 2009/01/07 19:50:09 fabiankeil
89 * - If the socket-timeout has been reached and the client
90 * hasn't received any data yet, send an explanation before
91 * closing the connection.
92 * - In get_request_line(), signal timeouts the right way.
94 * Revision 1.216 2008/12/24 22:13:11 ler762
95 * fix GCC 3.4.4 warning
97 * Revision 1.215 2008/12/24 17:06:19 fabiankeil
98 * Keep a thread around to timeout alive connections
99 * even if no new requests are coming in.
101 * Revision 1.214 2008/12/20 14:53:55 fabiankeil
102 * Add config option socket-timeout to control the time
103 * Privoxy waits for data to arrive on a socket. Useful
104 * in case of stale ssh tunnels or when fuzz-testing.
106 * Revision 1.213 2008/12/15 18:45:51 fabiankeil
107 * When logging crunches, log the whole URL, so one can easily
108 * differentiate between vanilla HTTP and CONNECT requests.
110 * Revision 1.212 2008/12/14 15:46:22 fabiankeil
111 * Give crunched requests their own log level.
113 * Revision 1.211 2008/12/06 10:05:03 fabiankeil
114 * Downgrade "Received x bytes while expecting y." message to
115 * LOG_LEVEL_CONNECT as it doesn't necessarily indicate an error.
117 * Revision 1.210 2008/12/02 22:03:18 fabiankeil
118 * Don't miscalculate byte_count if we don't get all the
119 * server headers with one read_socket() call. With keep-alive
120 * support enabled, this caused delays until the server closed
123 * Revision 1.209 2008/11/27 09:44:04 fabiankeil
124 * Cosmetics for the last commit: Don't watch out for
125 * the last chunk if the content isn't chunk-encoded or
126 * if we already determined the content length previously.
128 * Revision 1.208 2008/11/26 18:24:17 fabiankeil
129 * Recognize that the server response is complete if the
130 * last chunk is read together with the server headers.
133 * Revision 1.207 2008/11/25 17:25:16 fabiankeil
134 * Don't convert the client-header list to text until we need to.
136 * Revision 1.206 2008/11/23 17:00:11 fabiankeil
137 * Some more chat() cosmetics.
139 * Revision 1.205 2008/11/16 12:43:49 fabiankeil
140 * Turn keep-alive support into a runtime feature
141 * that is disabled by setting keep-alive-timeout
142 * to a negative value.
144 * Revision 1.204 2008/11/06 19:42:17 fabiankeil
145 * Fix last-chunk detection hack to also apply
146 * if buf[] contains nothing but the last-chunk.
148 * Revision 1.203 2008/11/06 18:34:35 fabiankeil
149 * Factor receive_client_request() and
150 * parse_client_request() out of chat().
152 * Revision 1.202 2008/11/02 18:40:34 fabiankeil
153 * If we received a different amount of data than we expected,
154 * log a warning and make sure the server socket isn't reused.
156 * Revision 1.201 2008/11/02 16:48:20 fabiankeil
157 * Revert revision 1.195 and try again.
159 * Revision 1.200 2008/10/26 16:53:18 fabiankeil
162 * Revision 1.199 2008/10/26 15:36:10 fabiankeil
163 * Remove two debug messages with LOG_LEVEL_INFO.
165 * Revision 1.198 2008/10/22 15:19:55 fabiankeil
166 * Once More, With Feeling: if there is no logfile
167 * because the user didn't specify one, we shouldn't
168 * call init_error_log() after receiving SIGHUP either.
170 * Revision 1.197 2008/10/20 17:02:40 fabiankeil
171 * If SIGHUP is received while we aren't running in daemon
172 * mode, calling init_error_log() would be a mistake.
174 * Revision 1.196 2008/10/16 09:16:41 fabiankeil
175 * - Fix two gcc44 conversion warnings.
176 * - Don't bother logging the last five bytes
179 * Revision 1.195 2008/10/13 16:04:37 fabiankeil
180 * Make sure we don't try to reuse tainted server sockets.
182 * Revision 1.194 2008/10/12 18:35:18 fabiankeil
183 * The last commit was a bit too ambitious, apparently the content
184 * length adjustment is only necessary if we aren't buffering.
186 * Revision 1.193 2008/10/12 15:57:35 fabiankeil
187 * Fix content length calculation if we read headers
188 * and the start of the body at once. Now that we have
189 * FEATURE_CONNECTION_KEEP_ALIVE, it actually matters.
191 * Revision 1.192 2008/10/11 18:19:14 fabiankeil
192 * Even more chat() cosmetics.
194 * Revision 1.191 2008/10/11 18:00:14 fabiankeil
195 * Reformat some comments in chat().
197 * Revision 1.190 2008/10/11 14:58:00 fabiankeil
198 * In case of chunk-encoded content, stop reading if
199 * the buffer looks like it ends with the last chunk.
201 * Revision 1.189 2008/10/11 09:53:00 fabiankeil
202 * Let server_response_is_complete() deal properly with
203 * content that is neither buffered nor read all at once.
205 * Revision 1.188 2008/10/09 18:21:41 fabiankeil
206 * Flush work-in-progress changes to keep outgoing connections
207 * alive where possible. Incomplete and mostly #ifdef'd out.
209 * Revision 1.187 2008/09/07 12:35:05 fabiankeil
210 * Add mutex lock support for _WIN32.
212 * Revision 1.186 2008/09/04 08:13:58 fabiankeil
213 * Prepare for critical sections on Windows by adding a
214 * layer of indirection before the pthread mutex functions.
216 * Revision 1.185 2008/08/30 12:03:07 fabiankeil
217 * Remove FEATURE_COOKIE_JAR.
219 * Revision 1.184 2008/08/22 15:34:45 fabiankeil
220 * - Silence LLVM/Clang complaint.
221 * - Make received_hup_signal static.
222 * - Hide definitions for basedir, pidfile and received_hup_signal
223 * from __EMX__ as they only seem to be used in case of #ifdef unix.
225 * Revision 1.183 2008/08/21 07:09:35 fabiankeil
226 * Accept Shoutcast responses again. Problem reported
227 * and fix suggested by Stefan in #2062860.
229 * Revision 1.182 2008/06/27 11:13:56 fabiankeil
230 * Fix possible NULL-pointer dereference reported
231 * by din_a4 in #2003937. Pointy hat to me.
233 * Revision 1.181 2008/05/21 15:47:15 fabiankeil
234 * Streamline sed()'s prototype and declare
235 * the header parse and add structures static.
237 * Revision 1.180 2008/05/21 15:26:32 fabiankeil
238 * - Mark csp as immutable for send_crunch_response().
239 * - Fix comment spelling.
241 * Revision 1.179 2008/05/20 20:13:32 fabiankeil
242 * Factor update_server_headers() out of sed(), ditch the
243 * first_run hack and make server_patterns_light static.
245 * Revision 1.178 2008/05/10 13:23:38 fabiankeil
246 * Don't provide get_header() with the whole client state
247 * structure when it only needs access to csp->iob.
249 * Revision 1.177 2008/05/10 11:51:12 fabiankeil
250 * Make the "read the rest of the headers" loop a bit more readable.
252 * Revision 1.176 2008/05/10 11:37:57 fabiankeil
253 * - Instead of logging when the IIS5 hack is enabled, log when it fails.
254 * - Remove useless comment.
256 * Revision 1.175 2008/05/09 18:53:59 fabiankeil
257 * Fix comment grammar.
259 * Revision 1.174 2008/05/07 18:05:53 fabiankeil
260 * Remove the pointless buffer in client_protocol_is_unsupported().
262 * Revision 1.173 2008/05/06 15:09:00 fabiankeil
263 * Least-effort fix for bug #1821930 (reported by Lee):
264 * If the response doesn't look like HTTP,
265 * tell the client and log the problem.
267 * Revision 1.172 2008/04/16 16:38:21 fabiankeil
268 * Don't pass the whole csp structure to flush_socket()
269 * when it only needs a file descriptor and a buffer.
271 * Revision 1.171 2008/03/27 18:27:25 fabiankeil
272 * Remove kill-popups action.
274 * Revision 1.170 2008/03/06 16:33:46 fabiankeil
275 * If limit-connect isn't used, don't limit CONNECT requests to port 443.
277 * Revision 1.169 2008/03/04 18:30:39 fabiankeil
278 * Remove the treat-forbidden-connects-like-blocks action. We now
279 * use the "blocked" page for forbidden CONNECT requests by default.
281 * Revision 1.168 2008/03/02 12:25:25 fabiankeil
282 * Also use shiny new connect_port_is_forbidden() in jcc.c.
284 * Revision 1.167 2008/02/23 16:57:12 fabiankeil
285 * Rename url_actions() to get_url_actions() and let it
286 * use the standard parameter ordering.
288 * Revision 1.166 2008/02/23 16:33:43 fabiankeil
289 * Let forward_url() use the standard parameter ordering
290 * and mark its second parameter immutable.
292 * Revision 1.165 2008/02/02 19:36:56 fabiankeil
293 * Remove the "Listening ... for local connections only" log message.
294 * Whether or not remote connections are able to reach Privoxy is up
295 * to the operating system.
297 * Revision 1.164 2007/12/16 18:32:46 fabiankeil
298 * Prevent the log messages for CONNECT requests to unacceptable
299 * ports from printing the limit-connect argument as [null] if
300 * limit-connect hasn't been explicitly enabled.
302 * Revision 1.163 2007/12/13 01:47:11 david__schmidt
303 * Make sure all console-mode apps get a usage() instance
305 * Revision 1.162 2007/12/06 17:54:57 fabiankeil
306 * Reword NO_SERVER_DATA_RESPONSE to make it harder
307 * to misunderstand what the message is all about.
309 * Revision 1.161 2007/12/04 19:44:22 fabiankeil
310 * Unbreak trustfile which previously didn't work without
311 * FEATURE_TOGGLE. Fixes BR#1843585, reported by Lee.
313 * Revision 1.160 2007/11/29 18:00:29 fabiankeil
314 * Plug memory leak. Spotted by Valgrind, triggered by
315 * Privoxy-Regression-Test feeding proxyfuzz.py.
317 * Revision 1.159 2007/11/24 14:34:09 fabiankeil
318 * In the HTTP snipplets, refer to the client as client.
320 * Revision 1.158 2007/11/11 16:44:17 fabiankeil
321 * Emit a log message when activating the MS IIS5 hack.
323 * Revision 1.157 2007/11/03 17:34:49 fabiankeil
324 * Log the "weak randomization factor" warning only
325 * once for mingw32 and provide some more details.
327 * Revision 1.156 2007/11/01 18:20:58 fabiankeil
328 * Initialize log module after initializing mutexes, future
329 * deadlocks in that code should now work cross-platform.
331 * Revision 1.155 2007/10/23 20:12:45 fabiankeil
332 * Fix first CSUCCEED line to end in \r\n as required by RFC1945.
333 * Reported by Bert van Leeuwen in BR#1818808.
335 * Revision 1.154 2007/10/19 17:00:08 fabiankeil
336 * Downgrade "Flushing header and buffers" message to LOG_LEVEL_INFO.
338 * Revision 1.153 2007/10/14 14:12:41 fabiankeil
339 * When in daemon mode, close stderr after the configuration file has been
340 * parsed the first time. If logfile isn't set, stop logging. Fixes BR#897436.
342 * Revision 1.152 2007/10/04 18:03:34 fabiankeil
343 * - Fix a crash when parsing invalid requests whose first header
344 * is rejected by get_header(). Regression (re?)introduced
345 * in r1.143 by yours truly.
346 * - Move ACTION_VANILLA_WAFER handling into parsers.c's
347 * client_cookie_adder() to make sure send-vanilla-wafer can be
348 * controlled through tags (and thus regression-tested).
350 * Revision 1.151 2007/09/29 10:21:16 fabiankeil
351 * - Move get_filter_function() from jcc.c to filters.c
352 * so the filter functions can be static.
353 * - Don't bother filtering body-less responses.
355 * Revision 1.150 2007/09/28 16:39:29 fabiankeil
356 * Execute content filters through execute_content_filter().
358 * Revision 1.149 2007/09/04 15:08:48 fabiankeil
359 * Initialize req to NULL to make sure it's defined if the
360 * first read_socket() call fails. Reported by icmp30.
362 * Revision 1.148 2007/08/26 16:47:13 fabiankeil
363 * Add Stephen Gildea's --pre-chroot-nslookup patch [#1276666],
364 * extensive comments moved to user manual.
366 * Revision 1.147 2007/08/25 14:42:40 fabiankeil
367 * Don't crash if a broken header filter wiped out the request line.
369 * Revision 1.146 2007/08/20 17:09:32 fabiankeil
370 * Fix byte_count calculation in case of flushes
371 * and don't parse the server headers a second time.
373 * Revision 1.145 2007/08/19 13:13:31 fabiankeil
374 * - If there's a connection problem after we already forwarded
375 * parts of the original content, just hang up. Fixes BR#1776724.
376 * - Fix warnings about unused code on mingw32.
377 * - In case of flushes, calculate the byte count
378 * less incorrectly (I think).
380 * Revision 1.144 2007/08/11 14:43:22 fabiankeil
381 * Add some more prototypes for static functions.
383 * Revision 1.143 2007/08/05 13:58:19 fabiankeil
384 * Comment out request_contains_null_bytes() until it's used again.
386 * Revision 1.142 2007/08/05 13:50:26 fabiankeil
387 * #1763173 from Stefan Huehner: s@const static@static const@
388 * and declare some more functions static.
390 * Revision 1.141 2007/08/04 09:56:23 fabiankeil
391 * - Log rejected CONNECT requests with LOG_LEVEL_INFO
392 * and explain why they were rejected in the first place.
393 * - Fix the LOG_LEVEL_CLF message for crunches of unallowed
394 * CONNECT requests. The request line was missing.
395 * - Add two more XXX reminders as we don't have enough already.
397 * Revision 1.140 2007/07/21 11:51:36 fabiankeil
398 * As Hal noticed, checking dispatch_cgi() as the last cruncher
399 * looks like a bug if CGI requests are blocked unintentionally,
400 * so don't do it unless the user enabled the new config option
401 * "allow-cgi-request-crunching".
403 * Revision 1.139 2007/07/14 07:46:41 fabiankeil
404 * - Allow to rewrite the request destination behind the client's back.
405 * - Turn the weird-looking unconditional for loop that
406 * reads the client request into a conditional while loop.
407 * Move the stuff that only runs once out of the loop.
408 * - Move parts of chat(), server_content_type() and the
409 * necessary stuff to fix BR#1750917 into get_filter_function().
411 * Revision 1.138 2007/06/03 18:45:18 fabiankeil
412 * Temporary workaround for BR#1730105.
414 * Revision 1.137 2007/06/01 18:16:36 fabiankeil
415 * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
416 * deadlocks and crashes on OpenBSD and possibly other OS with neither
417 * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
418 * Thanks to Ralf Horstmann for report and solution.
420 * Revision 1.136 2007/06/01 16:41:11 fabiankeil
421 * Add forward-override{} to change the forwarding settings through
422 * action sections. This is mainly interesting to forward different
423 * clients differently (for example based on User-Agent or request
426 * Revision 1.135 2007/05/24 17:03:50 fabiankeil
427 * - Let usage() mention the --chroot parameter.
428 * - Use read_socket() consistently and always leave
429 * the last buffer byte alone, even in cases where
430 * null termination (currently) doesn't matter.
432 * Revision 1.134 2007/05/16 14:59:46 fabiankeil
433 * - Fix config file loading on Unix if no config file is specified.
434 * Since r1.97 Privoxy would always interpret the last argument as
435 * config file, even if it's a valid command line option.
436 * - Abort in case of unrecognized command line options. Closes #1719696.
437 * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
438 * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
440 * Revision 1.133 2007/05/04 11:23:19 fabiankeil
441 * - Don't rerun crunchers that only depend on the request URL.
442 * - Don't count redirects and CGI requests as "blocked requests".
444 * Revision 1.132 2007/04/25 15:15:17 fabiankeil
445 * Support crunching based on tags created by server-header taggers.
447 * Revision 1.131 2007/04/22 13:24:50 fabiankeil
448 * Make HTTP snippets static (again). Add a Content-Type for those
449 * with content so the browser doesn't guess it based on the URL.
451 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
452 * Move crunching and request line rebuilding out of chat().
454 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
455 * Introduce tags as alternative way to specify which
456 * actions apply to a request. At the moment tags can be
457 * created based on client and server headers.
459 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
460 * Don't CLF-log CONNECT requests twice.
462 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
463 * Log the source address for ACL-related connection drops.
465 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
466 * New config option: enforce-blocks.
468 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
469 * - Move null byte check into separate function.
470 * - Don't confuse the client with error pages
471 * if a CONNECT request was already confirmed.
473 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
474 * Speed up NULL byte escaping and only log the complete
475 * NULL byte requests with header debugging enabled.
477 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
478 * Answer requests that contain NULL bytes with
479 * a custom response instead of waiting for more
480 * data until the client eventually hangs up.
482 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
483 * - Move delivery and logging of crunched responses
484 * from chat() into send_crunch_response().
485 * - Display the reason for generating http_responses.
486 * - Log the content length for LOG_LEVEL_CLF correctly
487 * (still incorrect for some fixed responses).
488 * - Reword an incorrect comment about
489 * treat-forbidden-connects-like-blocks violating
491 * - Add some log messages.
493 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
494 * Move mutex initialization into separate
495 * function and exit in case of errors.
497 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
498 * - Start to reduce chat()'s line count and move
499 * parts of it into separate functions.
500 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
502 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
503 * - Add Proxy-Agent header to HTTP snippets that are
504 * supposed to reach HTTP clients only.
505 * - Made a few CONNECT log messages more descriptive.
506 * - Catch completely empty server responses (as seen
507 * with Tor's fake ".noconnect" top level domain).
508 * - Use shiny new "forwarding-failed" template for socks errors.
510 * Revision 1.118 2007/01/07 07:43:43 joergs
511 * AmigaOS4 support added.
513 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
514 * Added config option accept-intercepted-requests
515 * and disabled it by default.
517 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
518 * Reverted parts of my last commit
519 * to keep error handling working.
521 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
522 * Fixed gcc43 conversion warnings.
524 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
525 * Fix -pedantic ISO C warning about converting
526 * from function pointer to object pointer.
528 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
529 * Silence compiler warning I introduced with my last commit.
531 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
532 * Mutex protect rand() if POSIX threading
533 * is used, warn the user if that's not possible
534 * and stop using it on _WIN32 where it could
537 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
538 * Don't prevent core dumps by catching SIGABRT.
539 * It's rude and makes debugging unreasonable painful.
541 * Revision 1.110 2006/12/13 14:52:53 etresoft
542 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
544 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
545 * Privoxy is now able to run as intercepting
546 * proxy in combination with any packet filter
547 * that does the port redirection. The destination
548 * is extracted from the "Host:" header which
549 * should be available for nearly all requests.
551 * Moved HTTP snipplets into jcc.c.
552 * Added error message for gopher proxy requests.
554 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
555 * Only unlink the pidfile if it's actually used.
557 * Change order of interception checks to make
558 * it possible to block or redirect requests for
561 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
562 * Make pthread mutex locking more generic. Instead of
563 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
564 * and use mutex locking unless there is an _r function
565 * available. Better safe than sorry.
567 * Fixes "./configure --disable-pthread" and should result
568 * in less threading-related problems on pthread-using platforms,
569 * but it still doesn't fix BR#1122404.
571 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
572 * Move pthread.h inclusion from jcc.c to jcc.h.
573 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
575 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
576 * Don't exit after receiving the second SIGHUP on Solaris.
578 * Fixes BR 1052235, but the same problem may exist on other
579 * systems. Once 3.0.6 is out we should use sigset()
580 * where available and see if it breaks anything.
582 * Revision 1.104 2006/09/23 13:26:38 roro
583 * Replace TABs by spaces in source code.
585 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
586 * Fix +redirect{}. Didn't work with -fast-redirects.
588 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
589 * Respond with 400 and a short text message
590 * if the client tries to use Privoxy as FTP proxy.
592 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
593 * Make number of retries in case of forwarded-connect problems
594 * a config file option (forwarded-connect-retries) and use 0 as
597 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
598 * Set random(3) seed.
600 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
601 * Follow the OpenBSD port's lead and protect the resolve
602 * functions on OpenBSD as well.
604 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
605 * --user fix. Only use the user as group if no group is specified.
606 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
608 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
609 * Windows service (re-)integration
613 * --install[:service_name]
614 * --uninstall[:service_name]
617 * They work as follows:
618 * --install will create a service for you and then terminate.
619 * By default the service name will be "privoxy" (without the quotes).
620 * However you can run multiple services if you wish, just by adding
621 * a colon and then a name (no spaces).
623 * --uninstall follows the exact same rules a --install.
625 * --service is used when the program is executed by the service
626 * control manager, and in normal circumstances would never be
627 * used as a command line argument.
629 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
630 * Windows service integration
632 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
633 * Incorporate Fabian Keil's patch work:
634 http://www.fabiankeil.de/sourcecode/privoxy/
636 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
637 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
638 * with what was really the latest development (the v_3_0_branch branch)
640 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
641 * Thanks to Jindrich Makovicka for a race condition fix for the log
642 * file. The race condition remains for non-pthread implementations.
643 * Reference patch #1175720.
645 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
646 * Add the ability to check jpeg images for invalid
647 * lengths of comment blocks. Defensive strategy
648 * against the exploit:
649 * Microsoft Security Bulletin MS04-028
650 * Buffer Overrun in JPEG Processing (GDI+) Could
651 * Allow Code Execution (833987)
652 * Enabled with +inspect-jpegs in actions files.
654 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
655 * - Fixed usage info for non-unix platforms
656 * - Fixed small cmdline parsing bug
658 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
659 * Diagnostics: Now preserve the returncode of pthread_create
660 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
662 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
663 * No longer ignore SIGCHLD. Fixes bug #769381
665 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
666 * Close jarfile on graceful exit, remove stray line
668 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
669 * Cosmetics: Killed a warning, a typo and an allocation left at exit
671 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
672 * No longer rely on non-POSIX.1 extensions of getcwd().
675 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
676 * Replaced setenv() by posix-compliant putenv()
677 * Thanks to Neil McCalden (nmcc AT users.sf.net).
679 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
680 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
682 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
683 * Clean-up and extension of improvements for forked mode:
684 * - Child's return code now consists of flags RC_FLAG_*
685 * - Reporting toggle to parent now properly #ifdef'ed
686 * - Children now report blocking to parent. This enables
687 * statistics in forked mode
689 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
690 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
691 * Children now report having been toggled through _exit(17), parents
692 * watch for that code and toggle themselves if found.
694 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
695 * Wrapping all *_r functions (the non-_r versions of them) with
696 * mutex semaphores for OSX. Hopefully this will take care of all
697 * of those pesky crash reports.
699 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
700 * Fixed two mostly harmless mem leaks
702 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
703 * Fix: Head of global clients list now initialized to NULL
705 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
706 * Added basic support for OPTIONS and TRACE HTTP methods:
707 * - New interceptor direct_response() added in chat().
708 * - sed() moved to earlier in the process, so that the
709 * Host: header is evaluated before actions and forwarding
712 * Revision 1.92 2002/05/08 16:00:46 oes
713 * Chat's buffer handling:
714 * - Fixed bug with unchecked out-of-mem conditions
715 * while reading client request & server headers
716 * - No longer predict if the buffer limit will be exceeded
717 * in the next read -- check add_to_iob's new
718 * return code. If buffer couldn't be extended
719 * (policy or out-of-mem) while
720 * - reading from client: abort
721 * - reading server headers: send error page
722 * - buffering server body for filter: flush,
723 * and if that fails: send error page
725 * Revision 1.91 2002/04/08 20:35:58 swa
728 * Revision 1.90 2002/04/02 14:57:28 oes
729 * Made sending wafers independent of FEATURE_COOKIE_JAR
731 * Revision 1.89 2002/03/31 17:18:59 jongfoster
732 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
734 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
735 * More compiler warning message maintenance
737 * Revision 1.87 2002/03/26 22:29:54 swa
738 * we have a new homepage!
740 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
741 * Workaround for closing the jarfile before load_config() comes around again
743 * Revision 1.85 2002/03/24 15:23:33 jongfoster
746 * Revision 1.84 2002/03/24 13:25:43 swa
747 * name change related issues
749 * Revision 1.83 2002/03/16 23:54:06 jongfoster
750 * Adding graceful termination feature, to help look for memory leaks.
751 * If you enable this (which, by design, has to be done by hand
752 * editing config.h) and then go to http://i.j.b/die, then the program
753 * will exit cleanly after the *next* request. It should free all the
754 * memory that was used.
756 * Revision 1.82 2002/03/13 00:27:05 jongfoster
759 * Revision 1.81 2002/03/12 01:42:50 oes
760 * Introduced modular filters
762 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
763 * OS/2 port maintenance:
764 * - Fixed EMX build - it had decayed a little
765 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
766 * substituted a memset for now.
768 * Revision 1.79 2002/03/09 20:03:52 jongfoster
769 * - Making various functions return int rather than size_t.
770 * (Undoing a recent change). Since size_t is unsigned on
771 * Windows, functions like read_socket that return -1 on
772 * error cannot return a size_t.
774 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
775 * crashes, and also frequently caused JB to jump to 100%
776 * CPU and stay there. (Because it thought it had just
777 * read ((unsigned)-1) == 4Gb of data...)
779 * - The signature of write_socket has changed, it now simply
780 * returns success=0/failure=nonzero.
782 * - Trying to get rid of a few warnings --with-debug on
783 * Windows, I've introduced a new type "jb_socket". This is
784 * used for the socket file descriptors. On Windows, this
785 * is SOCKET (a typedef for unsigned). Everywhere else, it's
786 * an int. The error value can't be -1 any more, so it's
787 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
788 * Windows it maps to the #define INVALID_SOCKET.)
790 * - The signature of bind_port has changed.
792 * Revision 1.78 2002/03/08 21:35:04 oes
793 * Added optional group supplement to --user option. Will now use default group of user if no group given
795 * Revision 1.77 2002/03/07 03:52:06 oes
796 * - Fixed compiler warnings etc
797 * - Improved handling of failed DNS lookups
799 * Revision 1.76 2002/03/06 22:54:35 jongfoster
800 * Automated function-comment nitpicking.
802 * Revision 1.75 2002/03/06 10:02:19 oes
803 * Fixed stupid bug when --user was not given
805 * Revision 1.74 2002/03/06 00:49:31 jongfoster
806 * Fixing warning on Windows
807 * Making #ifdefs that refer to the same variable consistently
808 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
810 * Revision 1.73 2002/03/05 23:57:30 hal9
811 * Stray character 's' on line 1618 was breaking build.
813 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
814 * - Re-enable OS/2 building after new parms were added
815 * - Fix false out of memory report when resolving CGI templates when no IP
816 * address is available of failed attempt (a la no such domain)
818 * Revision 1.71 2002/03/05 18:13:56 oes
819 * Added --user option
821 * Revision 1.70 2002/03/05 04:52:42 oes
822 * Deleted non-errlog debugging code
824 * Revision 1.69 2002/03/04 23:50:00 jongfoster
825 * Splitting off bind_port() call into bind_port_helper(), with
828 * Revision 1.68 2002/03/04 20:17:32 oes
831 * Revision 1.67 2002/03/04 18:18:57 oes
832 * - Removed _DEBUG mode
833 * - Cleand up cmdline parsing
834 * - Introduced --no-daemon, --pidfile options
835 * - Cleaned up signal handling:
836 * - Terminate cleanly on INT, TERM and ABRT
837 * - Schedule logfile for re-opening on HUP
838 * - Ignore CHLD and PIPE
839 * - Leave the rest with their default handlers
840 * - Uniform handler registration
841 * - Added usage() function
842 * - Played styleguide police
844 * Revision 1.66 2002/03/03 15:06:55 oes
845 * Re-enabled automatic config reloading
847 * Revision 1.65 2002/03/03 14:49:11 oes
848 * Fixed CLF logging: Now uses client's original HTTP request
850 * Revision 1.64 2002/03/03 09:18:03 joergs
851 * Made jumbjuster work on AmigaOS again.
853 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
854 * Clean up a little CRLF unpleasantness that suddenly appeared
856 * Revision 1.62 2002/02/20 23:17:23 jongfoster
857 * Detecting some out-of memory conditions and exiting with a log message.
859 * Revision 1.61 2002/01/17 21:01:52 jongfoster
860 * Moving all our URL and URL pattern parsing code to urlmatch.c.
862 * Revision 1.60 2001/12/30 14:07:32 steudten
863 * - Add signal handling (unix)
864 * - Add SIGHUP handler (unix)
865 * - Add creation of pidfile (unix)
866 * - Add action 'top' in rc file (RH)
867 * - Add entry 'SIGNALS' to manpage
868 * - Add exit message to logfile (unix)
870 * Revision 1.59 2001/12/13 14:07:18 oes
871 * Fixed Bug: 503 error page now sent OK
873 * Revision 1.58 2001/11/30 23:37:24 jongfoster
874 * Renaming the Win32 config file to config.txt - this is almost the
875 * same as the corresponding UNIX name "config"
877 * Revision 1.57 2001/11/16 00:47:43 jongfoster
878 * Changing the tty-disconnection code to use setsid().
880 * Revision 1.56 2001/11/13 20:20:54 jongfoster
881 * Tabs->spaces, fixing a bug with missing {} around an if()
883 * Revision 1.55 2001/11/13 20:14:53 jongfoster
884 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
886 * Revision 1.54 2001/11/07 00:03:14 steudten
887 * Give reliable return value if an error
888 * occurs not just 0 with new daemon mode.
890 * Revision 1.53 2001/11/05 21:41:43 steudten
891 * Add changes to be a real daemon just for unix os.
892 * (change cwd to /, detach from controlling tty, set
893 * process group and session leader to the own process.
895 * Add some fatal-error log message for failed malloc().
896 * Add '-d' if compiled with 'configure --with-debug' to
897 * enable debug output.
899 * Revision 1.52 2001/10/26 20:11:20 jongfoster
900 * Fixing type mismatch
902 * Revision 1.51 2001/10/26 17:38:28 oes
905 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
906 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
907 * threads to call select() simultaneously. So, it's time to do a real, live,
908 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
909 * (native). Both versions will work, but using __OS2__ offers multi-threading.
911 * Revision 1.49 2001/10/23 21:41:35 jongfoster
912 * Added call to initialize the (statically-allocated of course)
913 * "out of memory" CGI response.
915 * Revision 1.48 2001/10/10 19:56:46 jongfoster
916 * Moving some code that wasn't cookie-related out of an #ifdef
919 * Revision 1.47 2001/10/10 16:44:36 oes
920 * Added CONNECT destination port limitation check
922 * Revision 1.46 2001/10/08 15:17:41 oes
923 * Re-enabled SSL forwarding
925 * Revision 1.45 2001/10/07 15:42:11 oes
926 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
928 * Moved downgrading of the HTTP version from parse_http_request to
929 * chat(), since we can't decide if it is necessary before we have
930 * determined the actions for the URL. The HTTP command is now
931 * *always* re-built so the repairs need no longer be special-cased.
933 * filter_popups now gets a csp pointer so it can raise the new
934 * CSP_FLAG_MODIFIED flag.
938 * Added configurable size limit for the IOB. If the IOB grows so
939 * large that the next read would exceed the limit, the header
940 * is generated, and the header & unfiltered buffer are flushed
941 * to the client. Chat then continues in non-buffering,
942 * non-filtering body mode.
944 * Revision 1.44 2001/10/02 18:13:57 oes
947 * Revision 1.43 2001/10/02 15:32:13 oes
948 * Moved generation of hdr
950 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
951 * Cleaning up 2 compiler warnings on OS/2.
953 * Revision 1.41 2001/09/16 17:05:14 jongfoster
954 * Removing unused #include showarg.h
956 * Revision 1.40 2001/09/16 15:41:45 jongfoster
957 * Fixing signed/unsigned comparison warning.
959 * Revision 1.39 2001/09/16 13:21:27 jongfoster
960 * Changes to use new list functions.
962 * Revision 1.38 2001/09/16 13:01:46 jongfoster
963 * Removing redundant function call that zeroed zalloc()'d memory.
965 * Revision 1.37 2001/09/10 11:12:24 oes
966 * Deleted unused variable
968 * Revision 1.36 2001/09/10 10:56:15 oes
969 * Silenced compiler warnings
971 * Revision 1.35 2001/07/31 14:44:22 oes
972 * Deleted unused size parameter from filter_popups()
974 * Revision 1.34 2001/07/30 22:08:36 jongfoster
975 * Tidying up #defines:
976 * - All feature #defines are now of the form FEATURE_xxx
977 * - Permanently turned off WIN_GUI_EDIT
978 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
980 * Revision 1.33 2001/07/29 19:32:00 jongfoster
981 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
983 * Revision 1.32 2001/07/29 18:47:05 jongfoster
984 * Adding missing #include "loadcfg.h"
986 * Revision 1.31 2001/07/29 12:17:48 oes
987 * Applied pthread fix by Paul Lieverse
989 * Revision 1.30 2001/07/25 22:57:13 jongfoster
990 * __BEOS__ no longer overrides FEATURE_PTHREAD.
991 * This is because FEATURE_PTHREAD will soon be widely used, so I
992 * want to keep it simple.
994 * Revision 1.29 2001/07/24 12:47:06 oes
995 * Applied BeOS support update by Eugenia
997 * Revision 1.28 2001/07/23 13:26:12 oes
998 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
1000 * Revision 1.27 2001/07/19 19:09:47 haroon
1001 * - Added code to take care of the situation where while processing the first
1002 * server response (which includes the server header), after finding the end
1003 * of the headers we were not looking past the end of the headers for
1004 * content modification. I enabled it for filter_popups.
1005 * Someone else should look to see if other similar operations should be
1006 * done to the discarded portion of the buffer.
1008 * Note 2001/07/20: No, the other content modification mechanisms will process
1009 * the whole iob later anyway. --oes
1011 * Revision 1.26 2001/07/18 12:31:36 oes
1014 * Revision 1.25 2001/07/15 19:43:49 jongfoster
1015 * Supports POSIX threads.
1016 * Also removed some unused #includes.
1018 * Revision 1.24 2001/07/13 14:00:40 oes
1019 * - Generic content modification scheme:
1020 * Each feature has its own applicability flag that is set
1021 * from csp->action->flags.
1022 * Replaced the "filtering" int flag , by a function pointer
1023 * "content_filter" to the function that will do the content
1024 * modification. If it is != NULL, the document will be buffered
1025 * and processed through *content_filter, which must set
1026 * csp->content_length and return a modified copy of the body
1027 * or return NULL (on failiure).
1028 * - Changed csp->is_text to the more generic bitmap csp->content_type
1029 * which can currently take the valued CT_TEXT or CT_GIF
1030 * - Reformatting etc
1031 * - Removed all #ifdef PCRS
1033 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
1034 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
1035 * the `block_acl' call. This prevents a compilation error when the user
1036 * does not wish to use the "ACL" feature.
1038 * Revision 1.22 2001/06/29 21:45:41 oes
1039 * Indentation, CRLF->LF, Tab-> Space
1041 * Revision 1.21 2001/06/29 13:29:36 oes
1042 * - Cleaned up, improved comments
1043 * - Unified all possible interceptors (CGI,
1044 * block, trust, fast_redirect) in one
1045 * place, with one (CGI) answer generation
1046 * mechansim. Much clearer now.
1047 * - Removed the GIF image generation, which
1048 * is now done in filters.c:block_url()
1049 * - Made error conditions like domain lookup
1050 * failiure or (various) problems while talking
1051 * to the server use cgi.c:error_response()
1052 * instead of generating HTML/HTTP in chat() (yuck!)
1053 * - Removed logentry from cancelled commit
1055 * Revision 1.20 2001/06/09 10:55:28 jongfoster
1056 * Changing BUFSIZ ==> BUFFER_SIZE
1058 * Revision 1.19 2001/06/07 23:12:52 jongfoster
1059 * Replacing function pointer in struct gateway with a directly
1060 * called function forwarded_connect().
1061 * Replacing struct gateway with struct forward_spec
1063 * Revision 1.18 2001/06/03 19:12:16 oes
1064 * introduced new cgi handling
1066 * Revision 1.17 2001/06/01 20:07:23 jongfoster
1067 * Now uses action +image-blocker{} rather than config->tinygif
1069 * Revision 1.16 2001/06/01 18:49:17 jongfoster
1070 * Replaced "list_share" with "list" - the tiny memory gain was not
1071 * worth the extra complexity.
1073 * Revision 1.15 2001/05/31 21:24:47 jongfoster
1074 * Changed "permission" to "action" throughout.
1075 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
1076 * Moved vanilla wafer check into chat(), since we must now
1077 * decide whether or not to add it based on the URL.
1079 * Revision 1.14 2001/05/29 20:14:01 joergs
1080 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
1083 * Revision 1.13 2001/05/29 09:50:24 jongfoster
1084 * Unified blocklist/imagelist/permissionslist.
1085 * File format is still under discussion, but the internal changes
1086 * are (mostly) done.
1088 * Also modified interceptor behaviour:
1089 * - We now intercept all URLs beginning with one of the following
1090 * prefixes (and *only* these prefixes):
1092 * * http://ijbswa.sf.net/config/
1093 * * http://ijbswa.sourceforge.net/config/
1094 * - New interceptors "home page" - go to http://i.j.b/ to see it.
1095 * - Internal changes so that intercepted and fast redirect pages
1096 * are not replaced with an image.
1097 * - Interceptors now have the option to send a binary page direct
1098 * to the client. (i.e. ijb-send-banner uses this)
1099 * - Implemented show-url-info interceptor. (Which is why I needed
1100 * the above interceptors changes - a typical URL is
1101 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
1102 * The previous mechanism would not have intercepted that, and
1103 * if it had been intercepted then it then it would have replaced
1104 * it with an image.)
1106 * Revision 1.12 2001/05/27 22:17:04 oes
1108 * - re_process_buffer no longer writes the modified buffer
1109 * to the client, which was very ugly. It now returns the
1110 * buffer, which it is then written by chat.
1112 * - content_length now adjusts the Content-Length: header
1113 * for modified documents rather than crunch()ing it.
1114 * (Length info in csp->content_length, which is 0 for
1115 * unmodified documents)
1117 * - For this to work, sed() is called twice when filtering.
1119 * Revision 1.11 2001/05/26 17:27:53 jongfoster
1120 * Added support for CLF and fixed LOG_LEVEL_LOG.
1121 * Also did CRLF->LF fix of my previous patch.
1123 * Revision 1.10 2001/05/26 15:26:15 jongfoster
1124 * ACL feature now provides more security by immediately dropping
1125 * connections from untrusted hosts.
1127 * Revision 1.9 2001/05/26 00:28:36 jongfoster
1128 * Automatic reloading of config file.
1129 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
1130 * Most of the global variables have been moved to a new
1131 * struct configuration_spec, accessed through csp->config->globalname
1132 * Most of the globals remaining are used by the Win32 GUI.
1134 * Revision 1.8 2001/05/25 22:43:18 jongfoster
1135 * Fixing minor memory leak and buffer overflow.
1137 * Revision 1.7 2001/05/25 22:34:30 jongfoster
1140 * Revision 1.6 2001/05/23 00:13:58 joergs
1141 * AmigaOS support fixed.
1143 * Revision 1.5 2001/05/22 18:46:04 oes
1145 * - Enabled filtering banners by size rather than URL
1146 * by adding patterns that replace all standard banner
1147 * sizes with the "Junkbuster" gif to the re_filterfile
1149 * - Enabled filtering WebBugs by providing a pattern
1150 * which kills all 1x1 images
1152 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
1153 * which is selected by the (nonstandard and therefore
1154 * capital) letter 'U' in the option string.
1155 * It causes the quantifiers to be ungreedy by default.
1156 * Appending a ? turns back to greedy (!).
1158 * - Added a new interceptor ijb-send-banner, which
1159 * sends back the "Junkbuster" gif. Without imagelist or
1160 * MSIE detection support, or if tinygif = 1, or the
1161 * URL isn't recognized as an imageurl, a lame HTML
1162 * explanation is sent instead.
1164 * - Added new feature, which permits blocking remote
1165 * script redirects and firing back a local redirect
1167 * The feature is conditionally compiled, i.e. it
1168 * can be disabled with --disable-fast-redirects,
1169 * plus it must be activated by a "fast-redirects"
1170 * line in the config file, has its own log level
1171 * and of course wants to be displayed by show-proxy-args
1172 * Note: Boy, all the #ifdefs in 1001 locations and
1173 * all the fumbling with configure.in and acconfig.h
1174 * were *way* more work than the feature itself :-(
1176 * - Because a generic redirect template was needed for
1177 * this, tinygif = 3 now uses the same.
1179 * - Moved GIFs, and other static HTTP response templates
1182 * - Some minor fixes
1184 * - Removed some >400 CRs again (Jon, you really worked
1187 * Revision 1.4 2001/05/21 19:34:01 jongfoster
1188 * Made failure to bind() a fatal error.
1190 * Revision 1.3 2001/05/20 01:21:20 jongfoster
1191 * Version 2.9.4 checkin.
1192 * - Merged popupfile and cookiefile, and added control over PCRS
1193 * filtering, in new "permissionsfile".
1194 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
1195 * file error you now get a message box (in the Win32 GUI) rather
1196 * than the program exiting with no explanation.
1197 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
1199 * - Removed tabs from "config"
1200 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
1201 * - Bumped up version number.
1203 * Revision 1.2 2001/05/17 22:34:44 oes
1204 * - Added hint on GIF char array generation to jcc.c
1205 * - Cleaned CRLF's from the sources and related files
1206 * - Repaired logging for REF and FRC
1208 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
1209 * Initial import of version 2.9.3 source tree
1212 *********************************************************************/
1218 #include <sys/types.h>
1227 # ifndef FEATURE_PTHREAD
1231 # include <windows.h>
1232 # include <process.h>
1233 # endif /* ndef FEATURE_PTHREAD */
1236 # ifndef _WIN_CONSOLE
1237 # include "w32log.h"
1238 # endif /* ndef _WIN_CONSOLE */
1239 # include "w32svrapi.h"
1241 #else /* ifndef _WIN32 */
1243 # if !defined (__OS2__)
1244 # include <unistd.h>
1245 # include <sys/wait.h>
1246 # endif /* ndef __OS2__ */
1247 # include <sys/time.h>
1248 # include <sys/stat.h>
1249 # include <sys/ioctl.h>
1252 #include <sys/termios.h>
1260 # include <signal.h>
1263 # include <socket.h> /* BeOS has select() for sockets only. */
1264 # include <OS.h> /* declarations for threads and stuff. */
1267 # if defined(__EMX__) || defined(__OS2__)
1268 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
1273 #define bzero(B,N) memset(B,0x00,n)
1277 # include <select.h>
1282 #include "project.h"
1285 #include "filters.h"
1286 #include "loaders.h"
1287 #include "parsers.h"
1288 #include "miscutil.h"
1290 #include "jbsockets.h"
1291 #include "gateway.h"
1292 #include "actions.h"
1294 #include "loadcfg.h"
1295 #include "urlmatch.h"
1297 const char jcc_h_rcs[] = JCC_H_VERSION;
1298 const char project_h_rcs[] = PROJECT_H_VERSION;
1301 struct client_state clients[1];
1302 struct file_list files[1];
1304 #ifdef FEATURE_STATISTICS
1305 int urls_read = 0; /* total nr of urls read inc rejected */
1306 int urls_rejected = 0; /* total nr of urls rejected */
1307 #endif /* def FEATURE_STATISTICS */
1309 #ifdef FEATURE_GRACEFUL_TERMINATION
1310 int g_terminate = 0;
1313 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1314 static void sig_handler(int the_signal);
1316 static int client_protocol_is_unsupported(const struct client_state *csp, char *req);
1317 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
1318 static jb_err get_server_headers(struct client_state *csp);
1319 static const char *crunch_reason(const struct http_response *rsp);
1320 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp);
1321 static char *get_request_line(struct client_state *csp);
1322 static jb_err receive_client_request(struct client_state *csp);
1323 static jb_err parse_client_request(struct client_state *csp);
1324 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
1325 static jb_err change_request_destination(struct client_state *csp);
1326 static void chat(struct client_state *csp);
1327 static void serve(struct client_state *csp);
1328 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1329 static void usage(const char *myname);
1331 static void initialize_mutexes(void);
1332 static jb_socket bind_port_helper(struct configuration_spec *config);
1333 static void listen_loop(void);
1336 void serve(struct client_state *csp);
1337 #else /* ifndef AMIGA */
1338 static void serve(struct client_state *csp);
1339 #endif /* def AMIGA */
1342 static int32 server_thread(void *data);
1343 #endif /* def __BEOS__ */
1346 #define sleep(N) Sleep(((N) * 1000))
1350 #define sleep(N) DosSleep(((N) * 100))
1353 #ifdef MUTEX_LOCKS_AVAILABLE
1355 * XXX: Does the locking stuff really belong in this file?
1357 privoxy_mutex_t log_mutex;
1358 privoxy_mutex_t log_init_mutex;
1359 privoxy_mutex_t connection_reuse_mutex;
1361 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
1362 privoxy_mutex_t resolver_mutex;
1363 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
1365 #ifndef HAVE_GMTIME_R
1366 privoxy_mutex_t gmtime_mutex;
1367 #endif /* ndef HAVE_GMTIME_R */
1369 #ifndef HAVE_LOCALTIME_R
1370 privoxy_mutex_t localtime_mutex;
1371 #endif /* ndef HAVE_GMTIME_R */
1374 privoxy_mutex_t rand_mutex;
1375 #endif /* ndef HAVE_RANDOM */
1377 #endif /* def MUTEX_LOCKS_AVAILABLE */
1380 const char *basedir = NULL;
1381 const char *pidfile = NULL;
1382 static int received_hup_signal = 0;
1383 #endif /* defined unix */
1385 /* HTTP snipplets. */
1386 static const char CSUCCEED[] =
1387 "HTTP/1.0 200 Connection established\r\n"
1388 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
1390 static const char CHEADER[] =
1391 "HTTP/1.0 400 Invalid header received from client\r\n"
1392 "Proxy-Agent: Privoxy " VERSION "\r\n"
1393 "Content-Type: text/plain\r\n"
1394 "Connection: close\r\n\r\n"
1395 "Invalid header received from client.\r\n";
1397 static const char FTP_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 FTP.\r\n";
1403 static const char GOPHER_RESPONSE[] =
1404 "HTTP/1.0 400 Invalid request received from client\r\n"
1405 "Content-Type: text/plain\r\n"
1406 "Connection: close\r\n\r\n"
1407 "Invalid request. Privoxy doesn't support gopher.\r\n";
1409 /* XXX: should be a template */
1410 static const char MISSING_DESTINATION_RESPONSE[] =
1411 "HTTP/1.0 400 Bad request received from client\r\n"
1412 "Proxy-Agent: Privoxy " VERSION "\r\n"
1413 "Content-Type: text/plain\r\n"
1414 "Connection: close\r\n\r\n"
1415 "Bad request. Privoxy was unable to extract the destination.\r\n";
1417 /* XXX: should be a template */
1418 static const char NO_SERVER_DATA_RESPONSE[] =
1419 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1420 "Proxy-Agent: Privoxy " VERSION "\r\n"
1421 "Content-Type: text/plain\r\n"
1422 "Connection: close\r\n\r\n"
1423 "Empty server or forwarder response.\r\n"
1424 "The connection has been closed but Privoxy didn't receive any data.\r\n";
1426 /* XXX: should be a template */
1427 static const char INVALID_SERVER_HEADERS_RESPONSE[] =
1428 "HTTP/1.0 502 Server or forwarder response invalid\r\n"
1429 "Proxy-Agent: Privoxy " VERSION "\r\n"
1430 "Content-Type: text/plain\r\n"
1431 "Connection: close\r\n\r\n"
1432 "Bad response. The server or forwarder response doesn't look like HTTP.\r\n";
1435 /* XXX: should be a template */
1436 static const char NULL_BYTE_RESPONSE[] =
1437 "HTTP/1.0 400 Bad request received from client\r\n"
1438 "Proxy-Agent: Privoxy " VERSION "\r\n"
1439 "Content-Type: text/plain\r\n"
1440 "Connection: close\r\n\r\n"
1441 "Bad request. Null byte(s) before end of request.\r\n";
1444 /* XXX: should be a template */
1445 static const char MESSED_UP_REQUEST_RESPONSE[] =
1446 "HTTP/1.0 400 Malformed request after rewriting\r\n"
1447 "Proxy-Agent: Privoxy " VERSION "\r\n"
1448 "Content-Type: text/plain\r\n"
1449 "Connection: close\r\n\r\n"
1450 "Bad request. Messed up with header filters.\r\n";
1452 /* XXX: should be a template */
1453 static const char CONNECTION_TIMEOUT_RESPONSE[] =
1454 "HTTP/1.0 502 Connection timeout\r\n"
1455 "Proxy-Agent: Privoxy " VERSION "\r\n"
1456 "Content-Type: text/plain\r\n"
1457 "Connection: close\r\n\r\n"
1458 "The connection timed out.\r\n";
1460 /* A function to crunch a response */
1461 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
1463 /* Crunch function flags */
1464 #define CF_NO_FLAGS 0
1465 /* Cruncher applies to forced requests as well */
1466 #define CF_IGNORE_FORCE 1
1467 /* Crunched requests are counted for the block statistics */
1468 #define CF_COUNT_AS_REJECT 2
1470 /* A crunch function and its flags */
1473 const crunch_func_ptr cruncher;
1477 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
1479 /* Complete list of cruncher functions */
1480 static const struct cruncher crunchers_all[] = {
1481 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
1482 { block_url, CF_COUNT_AS_REJECT },
1483 #ifdef FEATURE_TRUST
1484 { trust_url, CF_COUNT_AS_REJECT },
1485 #endif /* def FEATURE_TRUST */
1486 { redirect_url, CF_NO_FLAGS },
1487 { dispatch_cgi, CF_IGNORE_FORCE},
1491 /* Light version, used after tags are applied */
1492 static const struct cruncher crunchers_light[] = {
1493 { block_url, CF_COUNT_AS_REJECT },
1494 { redirect_url, CF_NO_FLAGS },
1500 * XXX: Don't we really mean
1506 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1507 /*********************************************************************
1509 * Function : sig_handler
1511 * Description : Signal handler for different signals.
1512 * Exit gracefully on TERM and INT
1513 * or set a flag that will cause the errlog
1514 * to be reopened by the main thread on HUP.
1517 * 1 : the_signal = the signal cause this function to call
1521 *********************************************************************/
1522 static void sig_handler(int the_signal)
1528 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1540 received_hup_signal = 1;
1546 * We shouldn't be here, unless we catch signals
1547 * in main() that we can't handle here!
1549 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1557 /*********************************************************************
1559 * Function : client_protocol_is_unsupported
1561 * Description : Checks if the client used a known unsupported
1562 * protocol and deals with it by sending an error
1566 * 1 : csp = Current client state (buffers, headers, etc...)
1567 * 2 : req = the first request line send by the client
1569 * Returns : TRUE if an error response has been generated, or
1570 * FALSE if the request doesn't look invalid.
1572 *********************************************************************/
1573 static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1576 * If it's a FTP or gopher request, we don't support it.
1578 * These checks are better than nothing, but they might
1579 * not work in all configurations and some clients might
1580 * have problems digesting the answer.
1582 * They should, however, never cause more problems than
1583 * Privoxy's old behaviour (returning the misleading HTML
1586 * "Could not resolve http://(ftp|gopher)://example.org").
1588 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1590 const char *response = NULL;
1591 const char *protocol = NULL;
1593 if (!strncmpic(req, "GET ftp://", 10))
1595 response = FTP_RESPONSE;
1600 response = GOPHER_RESPONSE;
1601 protocol = "GOPHER";
1603 log_error(LOG_LEVEL_ERROR,
1604 "%s tried to use Privoxy as %s proxy: %s",
1605 csp->ip_addr_str, protocol, req);
1606 log_error(LOG_LEVEL_CLF,
1607 "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1609 write_socket(csp->cfd, response, strlen(response));
1618 /*********************************************************************
1620 * Function : get_request_destination_elsewhere
1622 * Description : If the client's request was redirected into
1623 * Privoxy without the client's knowledge,
1624 * the request line lacks the destination host.
1626 * This function tries to get it elsewhere,
1627 * provided accept-intercepted-requests is enabled.
1629 * "Elsewhere" currently only means "Host: header",
1630 * but in the future we may ask the redirecting
1631 * packet filter to look the destination up.
1633 * If the destination stays unknown, an error
1634 * response is send to the client and headers
1635 * are freed so that chat() can return directly.
1638 * 1 : csp = Current client state (buffers, headers, etc...)
1639 * 2 : headers = a header list
1641 * Returns : JB_ERR_OK if the destination is now known, or
1642 * JB_ERR_PARSE if it isn't.
1644 *********************************************************************/
1645 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1649 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1651 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1652 " Privoxy isn't configured to accept intercepted requests.",
1653 csp->ip_addr_str, csp->http->cmd);
1654 /* XXX: Use correct size */
1655 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1656 csp->ip_addr_str, csp->http->cmd);
1658 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1659 destroy_list(headers);
1661 return JB_ERR_PARSE;
1663 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1665 /* Split the domain we just got for pattern matching */
1666 init_domain_components(csp->http);
1672 /* We can't work without destination. Go spread the news.*/
1674 req = list_to_text(headers);
1676 /* XXX: Use correct size */
1677 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1678 csp->ip_addr_str, csp->http->cmd);
1679 log_error(LOG_LEVEL_ERROR,
1680 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1681 csp->ip_addr_str, csp->http->cmd, req);
1684 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
1685 destroy_list(headers);
1687 return JB_ERR_PARSE;
1690 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1691 * to get the destination IP address, use it as host directly
1692 * or do a reverse DNS lookup first.
1697 /*********************************************************************
1699 * Function : get_server_headers
1701 * Description : Parses server headers in iob and fills them
1702 * into csp->headers so that they can later be
1706 * 1 : csp = Current client state (buffers, headers, etc...)
1708 * Returns : JB_ERR_OK if everything went fine, or
1709 * JB_ERR_PARSE if the headers were incomplete.
1711 *********************************************************************/
1712 static jb_err get_server_headers(struct client_state *csp)
1714 int continue_hack_in_da_house = 0;
1717 while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
1722 * continue hack in da house. Ignore the ending of
1723 * this head and continue enlisting header lines.
1724 * The reason is described below.
1726 enlist(csp->headers, "");
1727 continue_hack_in_da_house = 0;
1730 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1733 * It's a bodyless continue response, don't
1734 * stop header parsing after reaching its end.
1736 * As a result Privoxy will concatenate the
1737 * next response's head and parse and deliver
1738 * the headers as if they belonged to one request.
1740 * The client will separate them because of the
1741 * empty line between them.
1743 * XXX: What we're doing here is clearly against
1744 * the intended purpose of the continue header,
1745 * and under some conditions (HTTP/1.0 client request)
1746 * it's a standard violation.
1748 * Anyway, "sort of against the spec" is preferable
1749 * to "always getting confused by Continue responses"
1750 * (Privoxy's behaviour before this hack was added)
1752 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1753 continue_hack_in_da_house = 1;
1755 else if (*header == '\0')
1758 * If the header is empty, but the Continue hack
1759 * isn't active, we can assume that we reached the
1760 * end of the buffer before we hit the end of the
1763 * Inform the caller an let it decide how to handle it.
1765 return JB_ERR_PARSE;
1768 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1771 * XXX: Should we quit the request and return a
1772 * out of memory error page instead?
1774 log_error(LOG_LEVEL_ERROR,
1775 "Out of memory while enlisting server headers. %s lost.",
1785 /*********************************************************************
1787 * Function : crunch_reason
1789 * Description : Translates the crunch reason code into a string.
1792 * 1 : rsp = a http_response
1794 * Returns : A string with the crunch reason or an error description.
1796 *********************************************************************/
1797 static const char *crunch_reason(const struct http_response *rsp)
1799 char * reason = NULL;
1801 assert(rsp != NULL);
1804 return "Internal error while searching for crunch reason";
1807 switch (rsp->reason)
1809 case RSP_REASON_UNSUPPORTED:
1810 reason = "Unsupported HTTP feature";
1812 case RSP_REASON_BLOCKED:
1815 case RSP_REASON_UNTRUSTED:
1816 reason = "Untrusted";
1818 case RSP_REASON_REDIRECTED:
1819 reason = "Redirected";
1821 case RSP_REASON_CGI_CALL:
1822 reason = "CGI Call";
1824 case RSP_REASON_NO_SUCH_DOMAIN:
1825 reason = "DNS failure";
1827 case RSP_REASON_FORWARDING_FAILED:
1828 reason = "Forwarding failed";
1830 case RSP_REASON_CONNECT_FAILED:
1831 reason = "Connection failure";
1833 case RSP_REASON_OUT_OF_MEMORY:
1834 reason = "Out of memory (may mask other reasons)";
1837 reason = "No reason recorded";
1845 /*********************************************************************
1847 * Function : send_crunch_response
1849 * Description : Delivers already prepared response for
1850 * intercepted requests, logs the interception
1851 * and frees the response.
1854 * 1 : csp = Current client state (buffers, headers, etc...)
1855 * 1 : rsp = Fully prepared response. Will be freed on exit.
1857 * Returns : Nothing.
1859 *********************************************************************/
1860 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp)
1862 const struct http_request *http = csp->http;
1863 char status_code[4];
1865 assert(rsp != NULL);
1866 assert(rsp->head != NULL);
1871 * Not supposed to happen. If it does
1872 * anyway, treat it as an unknown error.
1874 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1875 /* return code doesn't matter */
1880 /* If rsp is still NULL, we have serious internal problems. */
1881 log_error(LOG_LEVEL_FATAL,
1882 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1886 * Extract the status code from the actual head
1887 * that was send to the client. It is the only
1888 * way to get it right for all requests, including
1889 * the fixed ones for out-of-memory problems.
1891 * A head starts like this: 'HTTP/1.1 200...'
1895 status_code[0] = rsp->head[9];
1896 status_code[1] = rsp->head[10];
1897 status_code[2] = rsp->head[11];
1898 status_code[3] = '\0';
1900 /* Write the answer to the client */
1901 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1902 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1904 /* There is nothing we can do about it. */
1905 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1908 /* Log that the request was crunched and why. */
1909 log_error(LOG_LEVEL_CRUNCH, "%s: %s", crunch_reason(rsp), http->url);
1910 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %u",
1911 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1913 /* Clean up and return */
1914 if (cgi_error_memory() != rsp)
1916 free_http_response(rsp);
1923 /*********************************************************************
1925 * Function : request_contains_null_bytes
1927 * Description : Checks for NULL bytes in the request and sends
1928 * an error message to the client if any were found.
1930 * XXX: currently not used, see comment in chat().
1933 * 1 : csp = Current client state (buffers, headers, etc...)
1934 * 2 : buf = Data from the client's request to check.
1935 * 3 : len = The data length.
1937 * Returns : TRUE if the request contained one or more NULL bytes, or
1940 *********************************************************************/
1941 static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1943 size_t c_len; /* Request lenght when treated as C string */
1945 c_len = strlen(buf);
1950 * Null byte(s) found. Log the request,
1951 * return an error response and hang up.
1953 size_t tmp_len = c_len;
1958 * Replace NULL byte(s) with '°' characters
1959 * so the request can be logged as string.
1960 * XXX: Is there a better replacement character?
1963 tmp_len += strlen(buf+tmp_len);
1964 } while (tmp_len < len);
1966 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1967 "(length=%d, strlen=%u).", csp->ip_addr_str, len, c_len);
1968 log_error(LOG_LEVEL_HEADER,
1969 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1971 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
1973 /* XXX: Log correct size */
1974 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1984 /*********************************************************************
1986 * Function : crunch_response_triggered
1988 * Description : Checks if the request has to be crunched,
1989 * and delivers the crunch response if necessary.
1992 * 1 : csp = Current client state (buffers, headers, etc...)
1993 * 2 : crunchers = list of cruncher functions to run
1995 * Returns : TRUE if the request was answered with a crunch response
1998 *********************************************************************/
1999 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
2001 struct http_response *rsp = NULL;
2002 const struct cruncher *c;
2005 * If CGI request crunching is disabled,
2006 * check the CGI dispatcher out of order to
2007 * prevent unintentional blocks or redirects.
2009 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
2010 && (NULL != (rsp = dispatch_cgi(csp))))
2012 /* Deliver, log and free the interception response. */
2013 send_crunch_response(csp, rsp);
2017 for (c = crunchers; c->cruncher != NULL; c++)
2020 * Check the cruncher if either Privoxy is toggled
2021 * on and the request isn't forced, or if the cruncher
2022 * applies to forced requests as well.
2024 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
2025 !(csp->flags & CSP_FLAG_FORCED)) ||
2026 (c->flags & CF_IGNORE_FORCE))
2028 rsp = c->cruncher(csp);
2031 /* Deliver, log and free the interception response. */
2032 send_crunch_response(csp, rsp);
2033 #ifdef FEATURE_STATISTICS
2034 if (c->flags & CF_COUNT_AS_REJECT)
2036 csp->flags |= CSP_FLAG_REJECTED;
2038 #endif /* def FEATURE_STATISTICS */
2049 /*********************************************************************
2051 * Function : build_request_line
2053 * Description : Builds the HTTP request line.
2055 * If a HTTP forwarder is used it expects the whole URL,
2056 * web servers only get the path.
2059 * 1 : csp = Current client state (buffers, headers, etc...)
2060 * 2 : fwd = The forwarding spec used for the request
2061 * XXX: Should use http->fwd instead.
2062 * 3 : request_line = The old request line which will be replaced.
2064 * Returns : Nothing. Terminates in case of memory problems.
2066 *********************************************************************/
2067 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
2069 struct http_request *http = csp->http;
2071 assert(http->ssl == 0);
2074 * Downgrade http version from 1.1 to 1.0
2075 * if +downgrade action applies.
2077 if ( (csp->action->flags & ACTION_DOWNGRADE)
2078 && (!strcmpic(http->ver, "HTTP/1.1")))
2081 http->ver = strdup("HTTP/1.0");
2083 if (http->ver == NULL)
2085 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
2090 * Rebuild the request line.
2092 freez(*request_line);
2093 *request_line = strdup(http->gpc);
2094 string_append(request_line, " ");
2096 if (fwd->forward_host)
2098 string_append(request_line, http->url);
2102 string_append(request_line, http->path);
2104 string_append(request_line, " ");
2105 string_append(request_line, http->ver);
2107 if (*request_line == NULL)
2109 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
2111 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
2115 /*********************************************************************
2117 * Function : change_request_destination
2119 * Description : Parse a (rewritten) request line and regenerate
2120 * the http request data.
2123 * 1 : csp = Current client state (buffers, headers, etc...)
2125 * Returns : Forwards the parse_http_request() return code.
2126 * Terminates in case of memory problems.
2128 *********************************************************************/
2129 static jb_err change_request_destination(struct client_state *csp)
2131 struct http_request *http = csp->http;
2134 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
2135 free_http_request(http);
2136 err = parse_http_request(csp->headers->first->str, http);
2137 if (JB_ERR_OK != err)
2139 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
2140 jb_err_to_string(err));
2144 /* XXX: ocmd is a misleading name */
2145 http->ocmd = strdup(http->cmd);
2146 if (http->ocmd == NULL)
2148 log_error(LOG_LEVEL_FATAL,
2149 "Out of memory copying rewritten HTTP request line");
2157 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2158 /*********************************************************************
2160 * Function : server_response_is_complete
2162 * Description : Determines whether we should stop reading
2163 * from the server socket.
2166 * 1 : csp = Current client state (buffers, headers, etc...)
2167 * 2 : content_length = Length of content received so far.
2169 * Returns : TRUE if the response is complete,
2172 *********************************************************************/
2173 static int server_response_is_complete(struct client_state *csp,
2174 unsigned long long content_length)
2176 int content_length_known = !!(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
2178 if (!strcmpic(csp->http->gpc, "HEAD"))
2181 * "HEAD" implies no body, we are thus expecting
2182 * no content. XXX: incomplete "list" of methods?
2184 csp->expected_content_length = 0;
2185 content_length_known = TRUE;
2188 if (csp->http->status == 304)
2191 * Expect no body. XXX: incomplete "list" of status codes?
2193 csp->expected_content_length = 0;
2194 content_length_known = TRUE;
2197 return (content_length_known && ((0 == csp->expected_content_length)
2198 || (csp->expected_content_length <= content_length)));
2202 /*********************************************************************
2204 * Function : wait_for_alive_connections
2206 * Description : Waits for alive connections to timeout.
2212 *********************************************************************/
2213 static void wait_for_alive_connections()
2215 int connections_alive = close_unusable_connections();
2217 while (0 < connections_alive)
2219 log_error(LOG_LEVEL_CONNECT,
2220 "Waiting for %d connections to timeout.",
2223 connections_alive = close_unusable_connections();
2226 log_error(LOG_LEVEL_CONNECT, "No connections to wait for left.");
2229 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2232 /*********************************************************************
2234 * Function : mark_server_socket_tainted
2236 * Description : Makes sure we don't reuse a server socket
2237 * (if we didn't read everything the server sent
2238 * us reusing the socket would lead to garbage).
2241 * 1 : csp = Current client state (buffers, headers, etc...)
2245 *********************************************************************/
2246 static void mark_server_socket_tainted(struct client_state *csp)
2248 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
2250 log_error(LOG_LEVEL_CONNECT, "Unsetting keep-alive flag.");
2251 csp->flags &= ~CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE;
2255 /*********************************************************************
2257 * Function : get_request_line
2259 * Description : Read the client request line.
2262 * 1 : csp = Current client state (buffers, headers, etc...)
2264 * Returns : Pointer to request line or NULL in case of errors.
2266 *********************************************************************/
2267 static char *get_request_line(struct client_state *csp)
2269 char buf[BUFFER_SIZE];
2270 char *request_line = NULL;
2273 memset(buf, 0, sizeof(buf));
2277 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
2279 log_error(LOG_LEVEL_ERROR,
2280 "Stopped waiting for the request line.");
2281 write_socket(csp->cfd, CONNECTION_TIMEOUT_RESPONSE,
2282 strlen(CONNECTION_TIMEOUT_RESPONSE));
2286 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2288 if (len <= 0) return NULL;
2291 * If there is no memory left for buffering the
2292 * request, there is nothing we can do but hang up
2294 if (add_to_iob(csp, buf, len))
2299 request_line = get_header(csp->iob);
2301 } while ((NULL != request_line) && ('\0' == *request_line));
2303 return request_line;
2308 /*********************************************************************
2310 * Function : receive_client_request
2312 * Description : Read the client's request (more precisely the
2313 * client headers) and answer it if necessary.
2315 * Note that since we're not using select() we could get
2316 * blocked here if a client connected, then didn't say
2320 * 1 : csp = Current client state (buffers, headers, etc...)
2322 * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
2324 *********************************************************************/
2325 static jb_err receive_client_request(struct client_state *csp)
2327 char buf[BUFFER_SIZE];
2330 struct http_request *http;
2334 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
2335 struct list header_list;
2336 struct list *headers = &header_list;
2340 memset(buf, 0, sizeof(buf));
2342 req = get_request_line(csp);
2345 return JB_ERR_PARSE;
2347 assert(*req != '\0');
2349 if (client_protocol_is_unsupported(csp, req))
2351 return JB_ERR_PARSE;
2354 #ifdef FEATURE_FORCE_LOAD
2356 * If this request contains the FORCE_PREFIX and blocks
2357 * aren't enforced, get rid of it and set the force flag.
2359 if (strstr(req, FORCE_PREFIX))
2361 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
2363 log_error(LOG_LEVEL_FORCE,
2364 "Ignored force prefix in request: \"%s\".", req);
2368 strclean(req, FORCE_PREFIX);
2369 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
2370 csp->flags |= CSP_FLAG_FORCED;
2373 #endif /* def FEATURE_FORCE_LOAD */
2375 err = parse_http_request(req, http);
2377 if (JB_ERR_OK != err)
2379 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
2380 /* XXX: Use correct size */
2381 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2382 log_error(LOG_LEVEL_ERROR,
2383 "Couldn't parse request line received from %s: %s",
2384 csp->ip_addr_str, jb_err_to_string(err));
2386 free_http_request(http);
2387 return JB_ERR_PARSE;
2390 /* grab the rest of the client's headers */
2394 p = get_header(csp->iob);
2398 /* There are no additional headers to read. */
2405 * We didn't receive a complete header
2406 * line yet, get the rest of it.
2408 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
2410 log_error(LOG_LEVEL_ERROR,
2411 "Stopped grabbing the client headers.");
2412 return JB_ERR_PARSE;
2415 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2418 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
2419 destroy_list(headers);
2420 return JB_ERR_PARSE;
2423 if (add_to_iob(csp, buf, len))
2426 * If there is no memory left for buffering the
2427 * request, there is nothing we can do but hang up
2429 destroy_list(headers);
2430 return JB_ERR_MEMORY;
2436 * We were able to read a complete
2437 * header and can finaly enlist it.
2444 if (http->host == NULL)
2447 * If we still don't know the request destination,
2448 * the request is invalid or the client uses
2449 * Privoxy without its knowledge.
2451 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
2454 * Our attempts to get the request destination
2455 * elsewhere failed or Privoxy is configured
2456 * to only accept proxy requests.
2458 * An error response has already been send
2459 * and we're done here.
2461 return JB_ERR_PARSE;
2466 * Determine the actions for this URL
2468 #ifdef FEATURE_TOGGLE
2469 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
2471 /* Most compatible set of actions (i.e. none) */
2472 init_current_action(csp->action);
2475 #endif /* ndef FEATURE_TOGGLE */
2477 get_url_actions(csp, http);
2481 * Save a copy of the original request for logging
2483 http->ocmd = strdup(http->cmd);
2484 if (http->ocmd == NULL)
2486 log_error(LOG_LEVEL_FATAL,
2487 "Out of memory copying HTTP request line");
2489 enlist(csp->headers, http->cmd);
2491 /* Append the previously read headers */
2492 list_append_list_unique(csp->headers, headers);
2493 destroy_list(headers);
2500 /*********************************************************************
2502 * Function : parse_client_request
2504 * Description : Parses the client's request and decides what to do
2507 * Note that since we're not using select() we could get
2508 * blocked here if a client connected, then didn't say
2512 * 1 : csp = Current client state (buffers, headers, etc...)
2514 * Returns : JB_ERR_OK or JB_ERR_PARSE
2516 *********************************************************************/
2517 static jb_err parse_client_request(struct client_state *csp)
2519 struct http_request *http = csp->http;
2522 err = sed(csp, FILTER_CLIENT_HEADERS);
2523 if (JB_ERR_OK != err)
2525 /* XXX: Should be handled in sed(). */
2526 assert(err == JB_ERR_PARSE);
2527 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers.");
2529 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2531 /* Check request line for rewrites. */
2532 if ((NULL == csp->headers->first->str)
2533 || (strcmp(http->cmd, csp->headers->first->str) &&
2534 (JB_ERR_OK != change_request_destination(csp))))
2537 * A header filter broke the request line - bail out.
2539 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
2540 /* XXX: Use correct size */
2541 log_error(LOG_LEVEL_CLF,
2542 "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
2543 log_error(LOG_LEVEL_ERROR,
2544 "Invalid request line after applying header filters.");
2545 free_http_request(http);
2547 return JB_ERR_PARSE;
2555 /*********************************************************************
2559 * Description : Once a connection to the client has been accepted,
2560 * this function is called (via serve()) to handle the
2561 * main business of the communication. When this
2562 * function returns, the caller must close the client
2565 * FIXME: chat is nearly thousand lines long.
2569 * 1 : csp = Current client state (buffers, headers, etc...)
2571 * Returns : Nothing.
2573 *********************************************************************/
2574 static void chat(struct client_state *csp)
2576 char buf[BUFFER_SIZE];
2583 int ms_iis5_hack = 0;
2584 unsigned long long byte_count = 0;
2585 int forwarded_connect_retries = 0;
2586 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
2587 const struct forward_spec *fwd;
2588 struct http_request *http;
2589 int len = 0; /* for buffer sizes (and negative error codes) */
2591 /* Function that does the content filtering for the current request */
2592 filter_function_ptr content_filter = NULL;
2594 /* Skeleton for HTTP response, if we should intercept the request */
2595 struct http_response *rsp;
2596 struct timeval timeout;
2598 memset(buf, 0, sizeof(buf));
2599 memset(&timeout, 0, sizeof(timeout));
2600 timeout.tv_sec = csp->config->socket_timeout;
2604 if (receive_client_request(csp) != JB_ERR_OK)
2608 if (parse_client_request(csp) != JB_ERR_OK)
2613 /* decide how to route the HTTP request */
2614 fwd = forward_url(csp, http);
2617 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
2618 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2623 * build the http request to send to the server
2624 * we have to do one of the following:
2626 * create = use the original HTTP request to create a new
2627 * HTTP request that has either the path component
2628 * without the http://domainspec (w/path) or the
2629 * full orininal URL (w/url)
2630 * Note that the path and/or the HTTP version may
2631 * have been altered by now.
2633 * connect = Open a socket to the host:port of the server
2634 * and short-circuit server and client socket.
2636 * pass = Pass the request unchanged if forwarding a CONNECT
2637 * request to a parent proxy. Note that we'll be sending
2638 * the CFAIL message ourselves if connecting to the parent
2639 * fails, but we won't send a CSUCCEED message if it works,
2640 * since that would result in a double message (ours and the
2641 * parent's). After sending the request to the parent, we simply
2644 * here's the matrix:
2647 * +--------+--------+
2649 * 0 | create | connect|
2651 * Forwarding +--------+--------+
2653 * 1 | create | pass |
2655 * +--------+--------+
2659 if (http->ssl && connect_port_is_forbidden(csp))
2661 const char *acceptable_connect_ports =
2662 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
2663 assert(NULL != acceptable_connect_ports);
2664 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
2665 "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
2666 csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
2667 csp->action->flags |= ACTION_BLOCK;
2673 freez(csp->headers->first->str);
2674 build_request_line(csp, fwd, &csp->headers->first->str);
2678 * We have a request. Check if one of the crunchers wants it.
2680 if (crunch_response_triggered(csp, crunchers_all))
2683 * Yes. The client got the crunch response
2684 * and we are done here after cleaning up.
2686 /* XXX: why list_remove_all()? */
2687 list_remove_all(csp->headers);
2692 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2694 if (fwd->forward_host)
2696 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2697 fwd->forward_host, fwd->forward_port, http->hostport);
2701 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2704 /* here we connect to the server, gateway, or the forwarder */
2706 while ((csp->sfd = forwarded_connect(fwd, http, csp))
2707 && (errno == EINVAL)
2708 && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2710 log_error(LOG_LEVEL_ERROR,
2711 "failed request #%u to connect to %s. Trying again.",
2712 forwarded_connect_retries, http->hostport);
2715 if (csp->sfd == JB_INVALID_SOCKET)
2717 if (fwd->type != SOCKS_NONE)
2720 rsp = error_response(csp, "forwarding-failed", errno);
2722 else if (errno == EINVAL)
2724 rsp = error_response(csp, "no-such-domain", errno);
2728 rsp = error_response(csp, "connect-failed", errno);
2729 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2733 /* Write the answer to the client */
2736 send_crunch_response(csp, rsp);
2742 hdr = list_to_text(csp->headers);
2745 /* FIXME Should handle error properly */
2746 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2748 list_remove_all(csp->headers);
2750 if (fwd->forward_host || (http->ssl == 0))
2753 * Write the client's (modified) header to the server
2754 * (along with anything else that may be in the buffer)
2756 if (write_socket(csp->sfd, hdr, strlen(hdr))
2757 || (flush_socket(csp->sfd, csp->iob) < 0))
2759 log_error(LOG_LEVEL_CONNECT,
2760 "write header to: %s failed: %E", http->hostport);
2762 rsp = error_response(csp, "connect-failed", errno);
2765 send_crunch_response(csp, rsp);
2775 * We're running an SSL tunnel and we're not forwarding,
2776 * so just send the "connect succeeded" message to the
2777 * client, flush the rest, and get out of the way.
2779 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
2787 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2789 /* we're finished with the client's header */
2792 maxfd = (csp->cfd > csp->sfd) ? csp->cfd : csp->sfd;
2794 /* pass data between the client and server
2795 * until one or the other shuts down the connection.
2804 * FD_ZERO here seems to point to an errant macro which crashes.
2805 * So do this by hand for now...
2807 memset(&rfds,0x00,sizeof(fd_set));
2811 FD_SET(csp->cfd, &rfds);
2812 FD_SET(csp->sfd, &rfds);
2814 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2815 if ((csp->flags & CSP_FLAG_CHUNKED)
2816 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
2817 && ((csp->iob->eod - csp->iob->cur) >= 5)
2818 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
2820 log_error(LOG_LEVEL_CONNECT,
2821 "Looks like we read the last chunk together with "
2822 "the server headers. We better stop reading.");
2823 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
2824 csp->expected_content_length = byte_count;
2825 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2827 if (server_body && server_response_is_complete(csp, byte_count))
2829 log_error(LOG_LEVEL_CONNECT,
2830 "Done reading from server. Expected content length: %llu. "
2831 "Actual content length: %llu. Most recently received: %d.",
2832 csp->expected_content_length, byte_count, len);
2835 * XXX: should not jump around,
2836 * chat() is complicated enough already.
2840 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2842 n = select((int)maxfd+1, &rfds, NULL, NULL, &timeout);
2846 log_error(LOG_LEVEL_ERROR,
2847 "Didn't receive data in time: %s", http->url);
2848 if ((byte_count == 0) && (http->ssl == 0))
2850 write_socket(csp->cfd, CONNECTION_TIMEOUT_RESPONSE,
2851 strlen(CONNECTION_TIMEOUT_RESPONSE));
2853 mark_server_socket_tainted(csp);
2858 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2859 mark_server_socket_tainted(csp);
2864 * This is the body of the browser's request,
2865 * just read and write it.
2867 if (FD_ISSET(csp->cfd, &rfds))
2869 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2873 /* XXX: not sure if this is necessary. */
2874 mark_server_socket_tainted(csp);
2875 break; /* "game over, man" */
2878 if (write_socket(csp->sfd, buf, (size_t)len))
2880 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2881 mark_server_socket_tainted(csp);
2888 * The server wants to talk. It could be the header or the body.
2889 * If `hdr' is null, then it's the header otherwise it's the body.
2890 * FIXME: Does `hdr' really mean `host'? No.
2892 if (FD_ISSET(csp->sfd, &rfds))
2895 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2899 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2901 if (http->ssl && (fwd->forward_host == NULL))
2904 * Just hang up. We already confirmed the client's CONNECT
2905 * request with status code 200 and unencrypted content is
2906 * no longer welcome.
2908 log_error(LOG_LEVEL_ERROR,
2909 "CONNECT already confirmed. Unable to tell the client about the problem.");
2912 else if (byte_count)
2915 * Just hang up. We already transmitted the original headers
2916 * and parts of the original content and therefore missed the
2917 * chance to send an error message (without risking data corruption).
2919 * XXX: we could retry with a fancy range request here.
2921 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2922 "Unable to tell the client about the problem.");
2923 mark_server_socket_tainted(csp);
2927 rsp = error_response(csp, "connect-failed", errno);
2930 send_crunch_response(csp, rsp);
2936 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2937 if (csp->flags & CSP_FLAG_CHUNKED)
2939 if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2941 /* XXX: this is a temporary hack */
2942 log_error(LOG_LEVEL_CONNECT,
2943 "Looks like we reached the end of the last chunk. "
2944 "We better stop reading.");
2945 csp->expected_content_length = byte_count + (unsigned long long)len;
2946 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2950 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2953 * Add a trailing zero to let be able to use string operations.
2954 * XXX: do we still need this with filter_popups gone?
2959 * Normally, this would indicate that we've read
2960 * as much as the server has sent us and we can
2961 * close the client connection. However, Microsoft
2962 * in its wisdom has released IIS/5 with a bug that
2963 * prevents it from sending the trailing \r\n in
2964 * a 302 redirect header (and possibly other headers).
2965 * To work around this if we've haven't parsed
2966 * a full header we'll append a trailing \r\n
2967 * and see if this now generates a valid one.
2969 * This hack shouldn't have any impacts. If we've
2970 * already transmitted the header or if this is a
2971 * SSL connection, then we won't bother with this
2972 * hack. So we only work on partially received
2973 * headers. If we append a \r\n and this still
2974 * doesn't generate a valid header, then we won't
2975 * transmit anything to the client.
2980 if (server_body || http->ssl)
2983 * If we have been buffering up the document,
2984 * now is the time to apply content modification
2985 * and send the result to the client.
2989 p = execute_content_filter(csp, content_filter);
2991 * If the content filter fails, use the original
2992 * buffer and length.
2993 * (see p != NULL ? p : csp->iob->cur below)
2997 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
3000 if (JB_ERR_OK != update_server_headers(csp))
3002 log_error(LOG_LEVEL_FATAL,
3003 "Failed to update server headers. after filtering.");
3006 hdr = list_to_text(csp->headers);
3009 /* FIXME Should handle error properly */
3010 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3013 if (write_socket(csp->cfd, hdr, strlen(hdr))
3014 || write_socket(csp->cfd,
3015 ((p != NULL) ? p : csp->iob->cur), (size_t)csp->content_length))
3017 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
3020 mark_server_socket_tainted(csp);
3028 break; /* "game over, man" */
3032 * This is NOT the body, so
3033 * Let's pretend the server just sent us a blank line.
3035 snprintf(buf, sizeof(buf), "\r\n");
3036 len = (int)strlen(buf);
3039 * Now, let the normal header parsing algorithm below do its
3040 * job. If it fails, we'll exit instead of continuing.
3047 * If this is an SSL connection or we're in the body
3048 * of the server document, just write it to the client,
3049 * unless we need to buffer the body for later content-filtering
3051 if (server_body || http->ssl)
3056 * If there is no memory left for buffering the content, or the buffer limit
3057 * has been reached, switch to non-filtering mode, i.e. make & write the
3058 * header, flush the iob and buf, and get out of the way.
3060 if (add_to_iob(csp, buf, len))
3065 log_error(LOG_LEVEL_INFO,
3066 "Flushing header and buffers. Stepping back from filtering.");
3068 hdr = list_to_text(csp->headers);
3072 * Memory is too tight to even generate the header.
3073 * Send our static "Out-of-memory" page.
3075 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
3076 rsp = cgi_error_memory();
3077 send_crunch_response(csp, rsp);
3078 mark_server_socket_tainted(csp);
3081 hdrlen = strlen(hdr);
3083 if (write_socket(csp->cfd, hdr, hdrlen)
3084 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
3085 || (write_socket(csp->cfd, buf, (size_t)len)))
3087 log_error(LOG_LEVEL_CONNECT,
3088 "Flush header and buffers to client failed: %E");
3090 mark_server_socket_tainted(csp);
3095 * Reset the byte_count to the amount of bytes
3096 * we just flushed. len will be added a few lines below,
3097 * hdrlen doesn't matter for LOG_LEVEL_CLF.
3099 byte_count = (unsigned long long)flushed;
3101 content_filter = NULL;
3107 if (write_socket(csp->cfd, buf, (size_t)len))
3109 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
3110 mark_server_socket_tainted(csp);
3114 byte_count += (unsigned long long)len;
3119 const char *header_start;
3121 * We're still looking for the end of the server's header.
3122 * Buffer up the data we just read. If that fails, there's
3123 * little we can do but send our static out-of-memory page.
3125 if (add_to_iob(csp, buf, len))
3127 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
3128 rsp = cgi_error_memory();
3129 send_crunch_response(csp, rsp);
3130 mark_server_socket_tainted(csp);
3134 header_start = csp->iob->cur;
3136 /* Convert iob into something sed() can digest */
3137 if (JB_ERR_PARSE == get_server_headers(csp))
3142 * Well, we tried our MS IIS/5 hack and it didn't work.
3143 * The header is incomplete and there isn't anything
3144 * we can do about it.
3146 log_error(LOG_LEVEL_INFO,
3147 "MS IIS5 hack didn't produce valid headers.");
3153 * Since we have to wait for more from the server before
3154 * we can parse the headers we just continue here.
3156 long header_offset = csp->iob->cur - header_start;
3157 assert(csp->iob->cur >= header_start);
3158 byte_count += (unsigned long long)(len - header_offset);
3159 log_error(LOG_LEVEL_CONNECT, "Continuing buffering headers. "
3160 "byte_count: %llu. header_offset: %d. len: %d.",
3161 byte_count, header_offset, len);
3166 /* Did we actually get anything? */
3167 if (NULL == csp->headers->first)
3169 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
3170 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3171 write_socket(csp->cfd, NO_SERVER_DATA_RESPONSE, strlen(NO_SERVER_DATA_RESPONSE));
3172 free_http_request(http);
3173 mark_server_socket_tainted(csp);
3177 assert(csp->headers->first->str);
3179 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
3180 strncmpic(csp->headers->first->str, "ICY", 3))
3183 * It doesn't look like a HTTP (or Shoutcast) response:
3184 * tell the client and log the problem.
3186 if (strlen(csp->headers->first->str) > 30)
3188 csp->headers->first->str[30] = '\0';
3190 log_error(LOG_LEVEL_ERROR,
3191 "Invalid server or forwarder response. Starts with: %s",
3192 csp->headers->first->str);
3193 log_error(LOG_LEVEL_CLF,
3194 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3195 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
3196 strlen(INVALID_SERVER_HEADERS_RESPONSE));
3197 free_http_request(http);
3198 mark_server_socket_tainted(csp);
3203 * We have now received the entire server header,
3204 * filter it and send the result to the client
3206 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
3208 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
3210 hdr = list_to_text(csp->headers);
3213 /* FIXME Should handle error properly */
3214 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3217 if (crunch_response_triggered(csp, crunchers_light))
3220 * One of the tags created by a server-header
3221 * tagger triggered a crunch. We already
3222 * delivered the crunch response to the client
3223 * and are done here after cleaning up.
3226 mark_server_socket_tainted(csp);
3229 /* Buffer and pcrs filter this if appropriate. */
3231 if (!http->ssl) /* We talk plaintext */
3233 content_filter = get_filter_function(csp);
3236 * Only write if we're not buffering for content modification
3238 if (!content_filter)
3241 * Write the server's (modified) header to
3242 * the client (along with anything else that
3243 * may be in the buffer)
3246 if (write_socket(csp->cfd, hdr, strlen(hdr))
3247 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
3249 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
3252 * The write failed, so don't bother mentioning it
3253 * to the client... it probably can't hear us anyway.
3256 mark_server_socket_tainted(csp);
3260 byte_count += (unsigned long long)len;
3265 * XXX: the header lenght should probably
3266 * be calculated by get_server_headers().
3268 long header_length = csp->iob->cur - header_start;
3269 assert(csp->iob->cur > header_start);
3270 byte_count += (unsigned long long)(len - header_length);
3273 /* we're finished with the server's header */
3279 * If this was a MS IIS/5 hack then it means the server
3280 * has already closed the connection. Nothing more to read.
3285 log_error(LOG_LEVEL_INFO,
3286 "Closed server connection detected with MS IIS5 hack enabled.");
3292 mark_server_socket_tainted(csp);
3293 return; /* huh? we should never get here */
3296 if (csp->content_length == 0)
3299 * If Privoxy didn't recalculate the Content-Lenght,
3300 * byte_count is still correct.
3302 csp->content_length = byte_count;
3305 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3306 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3307 && (csp->expected_content_length != byte_count))
3309 log_error(LOG_LEVEL_CONNECT,
3310 "Received %llu bytes while expecting %llu.",
3311 byte_count, csp->expected_content_length);
3312 mark_server_socket_tainted(csp);
3316 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %llu",
3317 csp->ip_addr_str, http->ocmd, csp->content_length);
3321 /*********************************************************************
3325 * Description : This is little more than chat. We only "serve" to
3326 * to close any socket that chat may have opened.
3329 * 1 : csp = Current client state (buffers, headers, etc...)
3333 *********************************************************************/
3335 void serve(struct client_state *csp)
3336 #else /* ifndef AMIGA */
3337 static void serve(struct client_state *csp)
3338 #endif /* def AMIGA */
3341 close_socket(csp->cfd);
3343 if (csp->sfd != JB_INVALID_SOCKET)
3345 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3346 static int monitor_thread_running = 0;
3348 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
3349 && (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
3351 remember_connection(csp->sfd, csp->http, forward_url(csp, csp->http));
3352 privoxy_mutex_lock(&connection_reuse_mutex);
3353 if (!monitor_thread_running)
3355 monitor_thread_running = 1;
3356 privoxy_mutex_unlock(&connection_reuse_mutex);
3357 wait_for_alive_connections();
3358 privoxy_mutex_lock(&connection_reuse_mutex);
3359 monitor_thread_running = 0;
3361 privoxy_mutex_unlock(&connection_reuse_mutex);
3365 forget_connection(csp->sfd);
3366 close_socket(csp->sfd);
3369 close_socket(csp->sfd);
3370 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3373 csp->flags &= ~CSP_FLAG_ACTIVE;
3379 /*********************************************************************
3381 * Function : server_thread
3383 * Description : We only exist to call `serve' in a threaded environment.
3386 * 1 : data = Current client state (buffers, headers, etc...)
3388 * Returns : Always 0.
3390 *********************************************************************/
3391 static int32 server_thread(void *data)
3393 serve((struct client_state *) data);
3400 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3401 /*********************************************************************
3405 * Description : Print usage info & exit.
3407 * Parameters : Pointer to argv[0] for identifying ourselves
3411 *********************************************************************/
3412 static void usage(const char *myname)
3414 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
3418 #endif /* defined(unix) */
3421 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
3422 #endif /* defined(unix) */
3423 "[--version] [configfile]\n"
3424 "Aborting\n", myname);
3429 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
3432 #ifdef MUTEX_LOCKS_AVAILABLE
3433 /*********************************************************************
3435 * Function : privoxy_mutex_lock
3437 * Description : Locks a mutex.
3440 * 1 : mutex = The mutex to lock.
3442 * Returns : Void. May exit in case of errors.
3444 *********************************************************************/
3445 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
3447 #ifdef FEATURE_PTHREAD
3448 int err = pthread_mutex_lock(mutex);
3451 if (mutex != &log_mutex)
3453 log_error(LOG_LEVEL_FATAL,
3454 "Mutex locking failed: %s.\n", strerror(err));
3459 EnterCriticalSection(mutex);
3460 #endif /* def FEATURE_PTHREAD */
3464 /*********************************************************************
3466 * Function : privoxy_mutex_unlock
3468 * Description : Unlocks a mutex.
3471 * 1 : mutex = The mutex to unlock.
3473 * Returns : Void. May exit in case of errors.
3475 *********************************************************************/
3476 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
3478 #ifdef FEATURE_PTHREAD
3479 int err = pthread_mutex_unlock(mutex);
3482 if (mutex != &log_mutex)
3484 log_error(LOG_LEVEL_FATAL,
3485 "Mutex unlocking failed: %s.\n", strerror(err));
3490 LeaveCriticalSection(mutex);
3491 #endif /* def FEATURE_PTHREAD */
3495 /*********************************************************************
3497 * Function : privoxy_mutex_init
3499 * Description : Prepares a mutex.
3502 * 1 : mutex = The mutex to initialize.
3504 * Returns : Void. May exit in case of errors.
3506 *********************************************************************/
3507 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
3509 #ifdef FEATURE_PTHREAD
3510 int err = pthread_mutex_init(mutex, 0);
3513 printf("Fatal error. Mutex initialization failed: %s.\n",
3518 InitializeCriticalSection(mutex);
3519 #endif /* def FEATURE_PTHREAD */
3521 #endif /* def MUTEX_LOCKS_AVAILABLE */
3523 /*********************************************************************
3525 * Function : initialize_mutexes
3527 * Description : Prepares mutexes if mutex support is available.
3531 * Returns : Void, exits in case of errors.
3533 *********************************************************************/
3534 static void initialize_mutexes(void)
3536 #ifdef MUTEX_LOCKS_AVAILABLE
3538 * Prepare global mutex semaphores
3540 privoxy_mutex_init(&log_mutex);
3541 privoxy_mutex_init(&log_init_mutex);
3542 privoxy_mutex_init(&connection_reuse_mutex);
3545 * XXX: The assumptions below are a bit naive
3546 * and can cause locks that aren't necessary.
3548 * For example older FreeBSD versions (< 6.x?)
3549 * have no gethostbyname_r, but gethostbyname is
3552 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
3553 privoxy_mutex_init(&resolver_mutex);
3554 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
3556 * XXX: should we use a single mutex for
3557 * localtime() and gmtime() as well?
3559 #ifndef HAVE_GMTIME_R
3560 privoxy_mutex_init(&gmtime_mutex);
3561 #endif /* ndef HAVE_GMTIME_R */
3563 #ifndef HAVE_LOCALTIME_R
3564 privoxy_mutex_init(&localtime_mutex);
3565 #endif /* ndef HAVE_GMTIME_R */
3568 privoxy_mutex_init(&rand_mutex);
3569 #endif /* ndef HAVE_RANDOM */
3570 #endif /* def MUTEX_LOCKS_AVAILABLE */
3574 /*********************************************************************
3578 * Description : Load the config file and start the listen loop.
3579 * This function is a lot more *sane* with the `load_config'
3580 * and `listen_loop' functions; although it stills does
3581 * a *little* too much for my taste.
3584 * 1 : argc = Number of parameters (including $0).
3585 * 2 : argv = Array of (char *)'s to the parameters.
3587 * Returns : 1 if : can't open config file, unrecognized directive,
3588 * stats requested in multi-thread mode, can't open the
3589 * log file, can't open the jar file, listen port is invalid,
3590 * any load fails, and can't bind port.
3592 * Else main never returns, the process must be signaled
3593 * to terminate execution. Or, on Windows, use the
3594 * "File", "Exit" menu option.
3596 *********************************************************************/
3598 int real_main(int argc, const char *argv[])
3600 int main(int argc, const char *argv[])
3604 unsigned int random_seed;
3606 struct passwd *pw = NULL;
3607 struct group *grp = NULL;
3610 char *pre_chroot_nslookup_to_load_resolver = NULL;
3617 #if !defined(_WIN32)
3624 /* Prepare mutexes if supported and necessary. */
3625 initialize_mutexes();
3627 /* Enable logging until further notice. */
3631 * Parse the command line arguments
3633 * XXX: simply printing usage information in case of
3634 * invalid arguments isn't particularly user friendly.
3636 while (++argc_pos < argc)
3639 /* Check to see if the service must be installed or uninstalled */
3640 if (strncmp(argv[argc_pos], "--install", 9) == 0)
3642 const char *pName = argv[argc_pos] + 9;
3645 exit( (install_service(pName)) ? 0 : 1 );
3647 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
3649 const char *pName = argv[argc_pos] + 11;
3652 exit((uninstall_service(pName)) ? 0 : 1);
3654 else if (strcmp(argv[argc_pos], "--service" ) == 0)
3656 bRunAsService = TRUE;
3657 w32_set_service_cwd();
3658 atexit(w32_service_exit_notify);
3661 #endif /* defined(_WIN32) */
3664 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3666 if (strcmp(argv[argc_pos], "--help") == 0)
3671 else if(strcmp(argv[argc_pos], "--version") == 0)
3673 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
3679 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
3684 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
3686 if (++argc_pos == argc) usage(argv[0]);
3687 pidfile = strdup(argv[argc_pos]);
3690 else if (strcmp(argv[argc_pos], "--user" ) == 0)
3692 if (++argc_pos == argc) usage(argv[argc_pos]);
3694 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
3697 if (NULL == (grp = getgrnam(p)))
3699 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
3703 if (NULL == (pw = getpwnam(argv[argc_pos])))
3705 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
3708 if (p != NULL) *--p = '\0';
3711 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
3713 if (++argc_pos == argc) usage(argv[0]);
3714 pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
3717 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
3721 #endif /* defined(unix) */
3723 else if (argc_pos + 1 != argc)
3726 * This is neither the last command line
3727 * option, nor was it recognized before,
3728 * therefore it must be invalid.
3734 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3736 configfile = argv[argc_pos];
3739 } /* -END- while (more arguments) */
3741 show_version(Argv[0]);
3744 if ( *configfile != '/' )
3746 char cwd[BUFFER_SIZE];
3748 size_t abs_file_size;
3750 /* make config-filename absolute here */
3751 if (NULL == getcwd(cwd, sizeof(cwd)))
3753 perror("failed to get current working directory");
3758 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3759 basedir = strdup(cwd);
3761 if (NULL == basedir ||
3762 NULL == (abs_file = malloc(abs_file_size)))
3764 perror("malloc failed");
3767 strlcpy(abs_file, basedir, abs_file_size);
3768 strlcat(abs_file, "/", abs_file_size );
3769 strlcat(abs_file, configfile, abs_file_size);
3770 configfile = abs_file;
3772 #endif /* defined unix */
3776 clients->next = NULL;
3778 /* XXX: factor out initialising after the next stable release. */
3781 #elif defined(_WIN32)
3785 random_seed = (unsigned int)time(NULL);
3787 srandom(random_seed);
3790 #endif /* ifdef HAVE_RANDOM */
3793 * Unix signal handling
3795 * Catch the abort, interrupt and terminate signals for a graceful exit
3796 * Catch the hangup signal so the errlog can be reopened.
3797 * Ignore the broken pipe signals (FIXME: Why?)
3799 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3802 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3803 const int ignored_signals[] = { SIGPIPE, 0 };
3805 for (idx = 0; catched_signals[idx] != 0; idx++)
3807 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3808 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3810 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3811 #endif /* ifdef sun */
3813 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3817 for (idx = 0; ignored_signals[idx] != 0; idx++)
3819 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3821 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3826 #else /* ifdef _WIN32 */
3827 # ifdef _WIN_CONSOLE
3829 * We *are* in a windows console app.
3830 * Print a verbose messages about FAQ's and such
3832 printf("%s", win32_blurb);
3833 # endif /* def _WIN_CONSOLE */
3834 #endif /* def _WIN32 */
3837 /* Initialize the CGI subsystem */
3838 cgi_init_error_messages();
3841 * If runnig on unix and without the --nodaemon
3842 * option, become a daemon. I.e. fork, detach
3843 * from tty and get process group leadership
3856 if ( pid < 0 ) /* error */
3861 else if ( pid != 0 ) /* parent */
3866 * must check for errors
3867 * child died due to missing files aso
3870 wpid = waitpid( pid, &status, WNOHANG );
3879 /* Should be more portable, but not as well tested */
3884 #else /* ndef __FreeBSD__ */
3886 #endif /* ndef __FreeBSD__ */
3887 fd = open("/dev/tty", O_RDONLY);
3890 /* no error check here */
3891 ioctl( fd, TIOCNOTTY,0 );
3896 * stderr (fd 2) will be closed later on, when the
3897 * log file has been parsed.
3904 } /* -END- if (!no_daemon) */
3907 * As soon as we have written the PID file, we can switch
3908 * to the user and group ID indicated by the --user option
3914 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3916 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3920 if (setgroups(1, &grp->gr_gid))
3922 log_error(LOG_LEVEL_FATAL, "setgroups() failed: %E");
3925 else if (initgroups(pw->pw_name, pw->pw_gid))
3927 log_error(LOG_LEVEL_FATAL, "initgroups() failed: %E");
3933 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3935 /* Read the time zone file from /etc before doing chroot. */
3937 if (NULL != pre_chroot_nslookup_to_load_resolver
3938 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3940 /* Initialize resolver library. */
3941 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3943 if (chroot(pw->pw_dir) < 0)
3945 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3949 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3952 if (setuid(pw->pw_uid))
3954 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3958 char putenv_dummy[64];
3960 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3961 if (putenv(putenv_dummy) != 0)
3963 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3966 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3967 if (putenv(putenv_dummy) != 0)
3969 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3975 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3978 #endif /* defined unix */
3981 /* This will be FALSE unless the command line specified --service
3985 /* Yup, so now we must attempt to establish a connection
3986 * with the service dispatcher. This will only work if this
3987 * process was launched by the service control manager to
3988 * actually run as a service. If this isn't the case, i've
3989 * known it take around 30 seconds or so for the call to return.
3992 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3993 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3995 /* Service has run, and at this point is now being stopped, so just return */
4000 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
4002 /* An error occurred. Usually it's because --service was wrongly specified
4003 * and we were unable to connect to the Service Control Dispatcher because
4004 * it wasn't expecting us and is therefore not listening.
4006 * For now, just continue below to call the listen_loop function.
4009 #endif /* def _WIN32 */
4019 /*********************************************************************
4021 * Function : bind_port_helper
4023 * Description : Bind the listen port. Handles logging, and aborts
4027 * 1 : config = Privoxy configuration. Specifies port
4030 * Returns : Port that was opened.
4032 *********************************************************************/
4033 static jb_socket bind_port_helper(struct configuration_spec * config)
4038 if (config->haddr == NULL)
4040 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
4045 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
4046 config->hport, config->haddr);
4049 result = bind_port(config->haddr, config->hport, &bfd);
4056 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
4057 "There may be another Privoxy or some other "
4058 "proxy running on port %d",
4059 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
4060 config->hport, config->hport);
4063 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
4064 "The hostname is not resolvable",
4065 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
4068 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
4069 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
4072 /* shouldn't get here */
4073 return JB_INVALID_SOCKET;
4076 config->need_bind = 0;
4083 /* Without this simple workaround we get this compiler warning from _beginthread
4084 * warning C4028: formal parameter 1 different from declaration
4086 void w32_service_listen_loop(void *p)
4090 #endif /* def _WIN32 */
4093 /*********************************************************************
4095 * Function : listen_loop
4097 * Description : bind the listen port and enter a "FOREVER" listening loop.
4103 *********************************************************************/
4104 static void listen_loop(void)
4106 struct client_state *csp = NULL;
4108 struct configuration_spec * config;
4110 config = load_config();
4112 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4114 * XXX: Should be relocated once it no
4115 * longer needs to emit log messages.
4117 initialize_reusable_connections();
4118 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4120 bfd = bind_port_helper(config);
4122 #ifdef FEATURE_GRACEFUL_TERMINATION
4123 while (!g_terminate)
4128 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
4129 while (waitpid(-1, NULL, WNOHANG) > 0)
4131 /* zombie children */
4133 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
4136 * Free data that was used by died threads
4142 * Re-open the errlog after HUP signal
4144 if (received_hup_signal)
4146 if (NULL != config->logfile)
4148 init_error_log(Argv[0], config->logfile);
4150 received_hup_signal = 0;
4154 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
4156 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
4160 csp->flags |= CSP_FLAG_ACTIVE;
4161 csp->sfd = JB_INVALID_SOCKET;
4163 csp->config = config = load_config();
4165 if ( config->need_bind )
4168 * Since we were listening to the "old port", we will not see
4169 * a "listen" param change until the next IJB request. So, at
4170 * least 1 more request must be made for us to find the new
4171 * setting. I am simply closing the old socket and binding the
4174 * Which-ever is correct, we will serve 1 more page via the
4175 * old settings. This should probably be a "show-proxy-args"
4176 * request. This should not be a so common of an operation
4177 * that this will hurt people's feelings.
4182 bfd = bind_port_helper(config);
4185 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
4187 if (!accept_connection(csp, bfd))
4189 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
4202 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
4205 #ifdef FEATURE_TOGGLE
4206 if (global_toggle_state)
4207 #endif /* def FEATURE_TOGGLE */
4209 csp->flags |= CSP_FLAG_TOGGLED_ON;
4212 if (run_loader(csp))
4214 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
4215 /* Never get here - LOG_LEVEL_FATAL causes program exit */
4219 if (block_acl(NULL,csp))
4221 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
4222 close_socket(csp->cfd);
4226 #endif /* def FEATURE_ACL */
4228 /* add it to the list of clients */
4229 csp->next = clients->next;
4230 clients->next = csp;
4232 if (config->multi_threaded)
4236 /* this is a switch () statment in the C preprocessor - ugh */
4237 #undef SELECTED_ONE_OPTION
4239 /* Use Pthreads in preference to native code */
4240 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
4241 #define SELECTED_ONE_OPTION
4243 pthread_t the_thread;
4244 pthread_attr_t attrs;
4246 pthread_attr_init(&attrs);
4247 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
4248 errno = pthread_create(&the_thread, &attrs,
4249 (void * (*)(void *))serve, csp);
4250 child_id = errno ? -1 : 0;
4251 pthread_attr_destroy(&attrs);
4255 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
4256 #define SELECTED_ONE_OPTION
4257 child_id = _beginthread(
4258 (void (*)(void *))serve,
4263 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
4264 #define SELECTED_ONE_OPTION
4265 child_id = _beginthread(
4266 (void(* _Optlink)(void*))serve,
4272 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
4273 #define SELECTED_ONE_OPTION
4275 thread_id tid = spawn_thread
4276 (server_thread, "server", B_NORMAL_PRIORITY, csp);
4278 if ((tid >= 0) && (resume_thread(tid) == B_OK))
4280 child_id = (int) tid;
4289 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
4290 #define SELECTED_ONE_OPTION
4291 csp->cfd = ReleaseSocket(csp->cfd, -1);
4294 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4295 NP_Output, Output(),
4296 NP_CloseOutput, FALSE,
4297 NP_Name, (ULONG)"privoxy child",
4301 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4302 NP_Output, Output(),
4303 NP_CloseOutput, FALSE,
4304 NP_Name, (ULONG)"privoxy child",
4305 NP_StackSize, 200*1024,
4311 ((struct Task *)child_id)->tc_UserData = csp;
4312 Signal((struct Task *)child_id, SIGF_SINGLE);
4317 #if !defined(SELECTED_ONE_OPTION)
4320 /* This block is only needed when using fork().
4321 * When using threads, the server thread was
4322 * created and run by the call to _beginthread().
4324 if (child_id == 0) /* child */
4327 #ifdef FEATURE_TOGGLE
4328 int inherited_toggle_state = global_toggle_state;
4329 #endif /* def FEATURE_TOGGLE */
4334 * If we've been toggled or we've blocked the request, tell Mom
4337 #ifdef FEATURE_TOGGLE
4338 if (inherited_toggle_state != global_toggle_state)
4340 rc |= RC_FLAG_TOGGLED;
4342 #endif /* def FEATURE_TOGGLE */
4344 #ifdef FEATURE_STATISTICS
4345 if (csp->flags & CSP_FLAG_REJECTED)
4347 rc |= RC_FLAG_BLOCKED;
4349 #endif /* ndef FEATURE_STATISTICS */
4353 else if (child_id > 0) /* parent */
4355 /* in a fork()'d environment, the parent's
4356 * copy of the client socket and the CSP
4360 #if !defined(_WIN32) && !defined(__CYGWIN__)
4362 wait( &child_status );
4365 * Evaluate child's return code: If the child has
4366 * - been toggled, toggle ourselves
4367 * - blocked its request, bump up the stats counter
4370 #ifdef FEATURE_TOGGLE
4371 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
4373 global_toggle_state = !global_toggle_state;
4375 #endif /* def FEATURE_TOGGLE */
4377 #ifdef FEATURE_STATISTICS
4379 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
4383 #endif /* def FEATURE_STATISTICS */
4385 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
4386 close_socket(csp->cfd);
4387 csp->flags &= ~CSP_FLAG_ACTIVE;
4391 #undef SELECTED_ONE_OPTION
4392 /* end of cpp switch () */
4394 if (child_id < 0) /* failed */
4396 char buf[BUFFER_SIZE];
4398 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
4400 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
4402 write_socket(csp->cfd, buf, strlen(buf));
4403 close_socket(csp->cfd);
4404 csp->flags &= ~CSP_FLAG_ACTIVE;
4415 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
4417 /* Clean up. Aim: free all memory (no leaks) */
4418 #ifdef FEATURE_GRACEFUL_TERMINATION
4420 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
4422 unload_current_config_file();
4423 unload_current_actions_file();
4424 unload_current_re_filterfile();
4425 #ifdef FEATURE_TRUST
4426 unload_current_trust_file();
4429 if (config->multi_threaded)
4436 } while ((clients->next != NULL) && (--i > 0));
4440 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
4451 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
4452 /* Cleanup - remove taskbar icon etc. */
4457 #endif /* FEATURE_GRACEFUL_TERMINATION */