1 const char jcc_rcs[] = "$Id: jcc.c,v 1.234 2009/03/18 20:48:42 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 1.234 2009/03/18 20:48:42 fabiankeil
37 * If the --no-daemon option is used, enable LOG_LEVEL_INFO
38 * before the config file has been parsed (as we always did).
40 * Revision 1.233 2009/03/13 14:10:07 fabiankeil
41 * Fix some more harmless warnings on amd64.
43 * Revision 1.232 2009/03/08 19:29:16 fabiankeil
44 * Reinitialize the timeout structure every time before passing
45 * it to select(). Apparently some implementations mess with it.
46 * Probably fixes #2669131 reported by cyberpatrol.
48 * Revision 1.231 2009/03/08 14:19:23 fabiankeil
49 * Fix justified (but harmless) compiler warnings
50 * on platforms where sizeof(int) < sizeof(long).
52 * Revision 1.230 2009/03/07 13:09:17 fabiankeil
53 * Change csp->expected_content and_csp->expected_content_length from
54 * size_t to unsigned long long to reduce the likelihood of integer
55 * overflows that would let us close the connection prematurely.
56 * Bug found while investigating #2669131, reported by cyberpatrol.
58 * Revision 1.229 2009/03/07 11:17:01 fabiankeil
59 * Fix compiler warning.
61 * Revision 1.228 2009/03/06 20:30:13 fabiankeil
62 * Log unsigned values as such.
64 * Revision 1.227 2009/03/02 19:18:11 fabiankeil
65 * Streamline parse_http_request()'s prototype. As
66 * cparser pointed out it doesn't actually use csp.
68 * Revision 1.226 2009/03/01 18:28:24 fabiankeil
69 * Help clang understand that we aren't dereferencing
72 * Revision 1.225 2009/02/19 18:09:32 fabiankeil
73 * Unbreak build without FEATURE_CONNECTION_KEEP_ALIVE.
76 * Revision 1.224 2009/02/14 15:32:04 fabiankeil
77 * Add the request URL to the timeout message in chat().
80 * Revision 1.223 2009/02/09 21:21:16 fabiankeil
81 * Now that init_log_module() is called earlier, call show_version()
82 * later on from main() directly so it doesn't get called for --help
85 * Revision 1.222 2009/02/08 12:56:51 fabiankeil
86 * Call initialize_mutexes() before init_log_module() again.
87 * Broken since r220, might be the cause of Lee's #2579448.
89 * Revision 1.221 2009/02/06 18:02:58 fabiankeil
90 * When dropping privileges, also give up membership in supplementary
91 * groups. Thanks to Matthias Drochner for reporting the problem,
92 * providing the initial patch and testing the final version.
94 * Revision 1.220 2009/02/04 18:29:07 fabiankeil
95 * Initialize the log module before parsing arguments.
96 * Thanks to Matthias Drochner for the report.
98 * Revision 1.219 2009/01/31 16:08:21 fabiankeil
99 * Remove redundant error check in receive_client_request().
101 * Revision 1.218 2009/01/31 12:25:54 fabiankeil
102 * Flatten indentation in receive_client_request().
104 * Revision 1.217 2009/01/07 19:50:09 fabiankeil
105 * - If the socket-timeout has been reached and the client
106 * hasn't received any data yet, send an explanation before
107 * closing the connection.
108 * - In get_request_line(), signal timeouts the right way.
110 * Revision 1.216 2008/12/24 22:13:11 ler762
111 * fix GCC 3.4.4 warning
113 * Revision 1.215 2008/12/24 17:06:19 fabiankeil
114 * Keep a thread around to timeout alive connections
115 * even if no new requests are coming in.
117 * Revision 1.214 2008/12/20 14:53:55 fabiankeil
118 * Add config option socket-timeout to control the time
119 * Privoxy waits for data to arrive on a socket. Useful
120 * in case of stale ssh tunnels or when fuzz-testing.
122 * Revision 1.213 2008/12/15 18:45:51 fabiankeil
123 * When logging crunches, log the whole URL, so one can easily
124 * differentiate between vanilla HTTP and CONNECT requests.
126 * Revision 1.212 2008/12/14 15:46:22 fabiankeil
127 * Give crunched requests their own log level.
129 * Revision 1.211 2008/12/06 10:05:03 fabiankeil
130 * Downgrade "Received x bytes while expecting y." message to
131 * LOG_LEVEL_CONNECT as it doesn't necessarily indicate an error.
133 * Revision 1.210 2008/12/02 22:03:18 fabiankeil
134 * Don't miscalculate byte_count if we don't get all the
135 * server headers with one read_socket() call. With keep-alive
136 * support enabled, this caused delays until the server closed
139 * Revision 1.209 2008/11/27 09:44:04 fabiankeil
140 * Cosmetics for the last commit: Don't watch out for
141 * the last chunk if the content isn't chunk-encoded or
142 * if we already determined the content length previously.
144 * Revision 1.208 2008/11/26 18:24:17 fabiankeil
145 * Recognize that the server response is complete if the
146 * last chunk is read together with the server headers.
149 * Revision 1.207 2008/11/25 17:25:16 fabiankeil
150 * Don't convert the client-header list to text until we need to.
152 * Revision 1.206 2008/11/23 17:00:11 fabiankeil
153 * Some more chat() cosmetics.
155 * Revision 1.205 2008/11/16 12:43:49 fabiankeil
156 * Turn keep-alive support into a runtime feature
157 * that is disabled by setting keep-alive-timeout
158 * to a negative value.
160 * Revision 1.204 2008/11/06 19:42:17 fabiankeil
161 * Fix last-chunk detection hack to also apply
162 * if buf[] contains nothing but the last-chunk.
164 * Revision 1.203 2008/11/06 18:34:35 fabiankeil
165 * Factor receive_client_request() and
166 * parse_client_request() out of chat().
168 * Revision 1.202 2008/11/02 18:40:34 fabiankeil
169 * If we received a different amount of data than we expected,
170 * log a warning and make sure the server socket isn't reused.
172 * Revision 1.201 2008/11/02 16:48:20 fabiankeil
173 * Revert revision 1.195 and try again.
175 * Revision 1.200 2008/10/26 16:53:18 fabiankeil
178 * Revision 1.199 2008/10/26 15:36:10 fabiankeil
179 * Remove two debug messages with LOG_LEVEL_INFO.
181 * Revision 1.198 2008/10/22 15:19:55 fabiankeil
182 * Once More, With Feeling: if there is no logfile
183 * because the user didn't specify one, we shouldn't
184 * call init_error_log() after receiving SIGHUP either.
186 * Revision 1.197 2008/10/20 17:02:40 fabiankeil
187 * If SIGHUP is received while we aren't running in daemon
188 * mode, calling init_error_log() would be a mistake.
190 * Revision 1.196 2008/10/16 09:16:41 fabiankeil
191 * - Fix two gcc44 conversion warnings.
192 * - Don't bother logging the last five bytes
195 * Revision 1.195 2008/10/13 16:04:37 fabiankeil
196 * Make sure we don't try to reuse tainted server sockets.
198 * Revision 1.194 2008/10/12 18:35:18 fabiankeil
199 * The last commit was a bit too ambitious, apparently the content
200 * length adjustment is only necessary if we aren't buffering.
202 * Revision 1.193 2008/10/12 15:57:35 fabiankeil
203 * Fix content length calculation if we read headers
204 * and the start of the body at once. Now that we have
205 * FEATURE_CONNECTION_KEEP_ALIVE, it actually matters.
207 * Revision 1.192 2008/10/11 18:19:14 fabiankeil
208 * Even more chat() cosmetics.
210 * Revision 1.191 2008/10/11 18:00:14 fabiankeil
211 * Reformat some comments in chat().
213 * Revision 1.190 2008/10/11 14:58:00 fabiankeil
214 * In case of chunk-encoded content, stop reading if
215 * the buffer looks like it ends with the last chunk.
217 * Revision 1.189 2008/10/11 09:53:00 fabiankeil
218 * Let server_response_is_complete() deal properly with
219 * content that is neither buffered nor read all at once.
221 * Revision 1.188 2008/10/09 18:21:41 fabiankeil
222 * Flush work-in-progress changes to keep outgoing connections
223 * alive where possible. Incomplete and mostly #ifdef'd out.
225 * Revision 1.187 2008/09/07 12:35:05 fabiankeil
226 * Add mutex lock support for _WIN32.
228 * Revision 1.186 2008/09/04 08:13:58 fabiankeil
229 * Prepare for critical sections on Windows by adding a
230 * layer of indirection before the pthread mutex functions.
232 * Revision 1.185 2008/08/30 12:03:07 fabiankeil
233 * Remove FEATURE_COOKIE_JAR.
235 * Revision 1.184 2008/08/22 15:34:45 fabiankeil
236 * - Silence LLVM/Clang complaint.
237 * - Make received_hup_signal static.
238 * - Hide definitions for basedir, pidfile and received_hup_signal
239 * from __EMX__ as they only seem to be used in case of #ifdef unix.
241 * Revision 1.183 2008/08/21 07:09:35 fabiankeil
242 * Accept Shoutcast responses again. Problem reported
243 * and fix suggested by Stefan in #2062860.
245 * Revision 1.182 2008/06/27 11:13:56 fabiankeil
246 * Fix possible NULL-pointer dereference reported
247 * by din_a4 in #2003937. Pointy hat to me.
249 * Revision 1.181 2008/05/21 15:47:15 fabiankeil
250 * Streamline sed()'s prototype and declare
251 * the header parse and add structures static.
253 * Revision 1.180 2008/05/21 15:26:32 fabiankeil
254 * - Mark csp as immutable for send_crunch_response().
255 * - Fix comment spelling.
257 * Revision 1.179 2008/05/20 20:13:32 fabiankeil
258 * Factor update_server_headers() out of sed(), ditch the
259 * first_run hack and make server_patterns_light static.
261 * Revision 1.178 2008/05/10 13:23:38 fabiankeil
262 * Don't provide get_header() with the whole client state
263 * structure when it only needs access to csp->iob.
265 * Revision 1.177 2008/05/10 11:51:12 fabiankeil
266 * Make the "read the rest of the headers" loop a bit more readable.
268 * Revision 1.176 2008/05/10 11:37:57 fabiankeil
269 * - Instead of logging when the IIS5 hack is enabled, log when it fails.
270 * - Remove useless comment.
272 * Revision 1.175 2008/05/09 18:53:59 fabiankeil
273 * Fix comment grammar.
275 * Revision 1.174 2008/05/07 18:05:53 fabiankeil
276 * Remove the pointless buffer in client_protocol_is_unsupported().
278 * Revision 1.173 2008/05/06 15:09:00 fabiankeil
279 * Least-effort fix for bug #1821930 (reported by Lee):
280 * If the response doesn't look like HTTP,
281 * tell the client and log the problem.
283 * Revision 1.172 2008/04/16 16:38:21 fabiankeil
284 * Don't pass the whole csp structure to flush_socket()
285 * when it only needs a file descriptor and a buffer.
287 * Revision 1.171 2008/03/27 18:27:25 fabiankeil
288 * Remove kill-popups action.
290 * Revision 1.170 2008/03/06 16:33:46 fabiankeil
291 * If limit-connect isn't used, don't limit CONNECT requests to port 443.
293 * Revision 1.169 2008/03/04 18:30:39 fabiankeil
294 * Remove the treat-forbidden-connects-like-blocks action. We now
295 * use the "blocked" page for forbidden CONNECT requests by default.
297 * Revision 1.168 2008/03/02 12:25:25 fabiankeil
298 * Also use shiny new connect_port_is_forbidden() in jcc.c.
300 * Revision 1.167 2008/02/23 16:57:12 fabiankeil
301 * Rename url_actions() to get_url_actions() and let it
302 * use the standard parameter ordering.
304 * Revision 1.166 2008/02/23 16:33:43 fabiankeil
305 * Let forward_url() use the standard parameter ordering
306 * and mark its second parameter immutable.
308 * Revision 1.165 2008/02/02 19:36:56 fabiankeil
309 * Remove the "Listening ... for local connections only" log message.
310 * Whether or not remote connections are able to reach Privoxy is up
311 * to the operating system.
313 * Revision 1.164 2007/12/16 18:32:46 fabiankeil
314 * Prevent the log messages for CONNECT requests to unacceptable
315 * ports from printing the limit-connect argument as [null] if
316 * limit-connect hasn't been explicitly enabled.
318 * Revision 1.163 2007/12/13 01:47:11 david__schmidt
319 * Make sure all console-mode apps get a usage() instance
321 * Revision 1.162 2007/12/06 17:54:57 fabiankeil
322 * Reword NO_SERVER_DATA_RESPONSE to make it harder
323 * to misunderstand what the message is all about.
325 * Revision 1.161 2007/12/04 19:44:22 fabiankeil
326 * Unbreak trustfile which previously didn't work without
327 * FEATURE_TOGGLE. Fixes BR#1843585, reported by Lee.
329 * Revision 1.160 2007/11/29 18:00:29 fabiankeil
330 * Plug memory leak. Spotted by Valgrind, triggered by
331 * Privoxy-Regression-Test feeding proxyfuzz.py.
333 * Revision 1.159 2007/11/24 14:34:09 fabiankeil
334 * In the HTTP snipplets, refer to the client as client.
336 * Revision 1.158 2007/11/11 16:44:17 fabiankeil
337 * Emit a log message when activating the MS IIS5 hack.
339 * Revision 1.157 2007/11/03 17:34:49 fabiankeil
340 * Log the "weak randomization factor" warning only
341 * once for mingw32 and provide some more details.
343 * Revision 1.156 2007/11/01 18:20:58 fabiankeil
344 * Initialize log module after initializing mutexes, future
345 * deadlocks in that code should now work cross-platform.
347 * Revision 1.155 2007/10/23 20:12:45 fabiankeil
348 * Fix first CSUCCEED line to end in \r\n as required by RFC1945.
349 * Reported by Bert van Leeuwen in BR#1818808.
351 * Revision 1.154 2007/10/19 17:00:08 fabiankeil
352 * Downgrade "Flushing header and buffers" message to LOG_LEVEL_INFO.
354 * Revision 1.153 2007/10/14 14:12:41 fabiankeil
355 * When in daemon mode, close stderr after the configuration file has been
356 * parsed the first time. If logfile isn't set, stop logging. Fixes BR#897436.
358 * Revision 1.152 2007/10/04 18:03:34 fabiankeil
359 * - Fix a crash when parsing invalid requests whose first header
360 * is rejected by get_header(). Regression (re?)introduced
361 * in r1.143 by yours truly.
362 * - Move ACTION_VANILLA_WAFER handling into parsers.c's
363 * client_cookie_adder() to make sure send-vanilla-wafer can be
364 * controlled through tags (and thus regression-tested).
366 * Revision 1.151 2007/09/29 10:21:16 fabiankeil
367 * - Move get_filter_function() from jcc.c to filters.c
368 * so the filter functions can be static.
369 * - Don't bother filtering body-less responses.
371 * Revision 1.150 2007/09/28 16:39:29 fabiankeil
372 * Execute content filters through execute_content_filter().
374 * Revision 1.149 2007/09/04 15:08:48 fabiankeil
375 * Initialize req to NULL to make sure it's defined if the
376 * first read_socket() call fails. Reported by icmp30.
378 * Revision 1.148 2007/08/26 16:47:13 fabiankeil
379 * Add Stephen Gildea's --pre-chroot-nslookup patch [#1276666],
380 * extensive comments moved to user manual.
382 * Revision 1.147 2007/08/25 14:42:40 fabiankeil
383 * Don't crash if a broken header filter wiped out the request line.
385 * Revision 1.146 2007/08/20 17:09:32 fabiankeil
386 * Fix byte_count calculation in case of flushes
387 * and don't parse the server headers a second time.
389 * Revision 1.145 2007/08/19 13:13:31 fabiankeil
390 * - If there's a connection problem after we already forwarded
391 * parts of the original content, just hang up. Fixes BR#1776724.
392 * - Fix warnings about unused code on mingw32.
393 * - In case of flushes, calculate the byte count
394 * less incorrectly (I think).
396 * Revision 1.144 2007/08/11 14:43:22 fabiankeil
397 * Add some more prototypes for static functions.
399 * Revision 1.143 2007/08/05 13:58:19 fabiankeil
400 * Comment out request_contains_null_bytes() until it's used again.
402 * Revision 1.142 2007/08/05 13:50:26 fabiankeil
403 * #1763173 from Stefan Huehner: s@const static@static const@
404 * and declare some more functions static.
406 * Revision 1.141 2007/08/04 09:56:23 fabiankeil
407 * - Log rejected CONNECT requests with LOG_LEVEL_INFO
408 * and explain why they were rejected in the first place.
409 * - Fix the LOG_LEVEL_CLF message for crunches of unallowed
410 * CONNECT requests. The request line was missing.
411 * - Add two more XXX reminders as we don't have enough already.
413 * Revision 1.140 2007/07/21 11:51:36 fabiankeil
414 * As Hal noticed, checking dispatch_cgi() as the last cruncher
415 * looks like a bug if CGI requests are blocked unintentionally,
416 * so don't do it unless the user enabled the new config option
417 * "allow-cgi-request-crunching".
419 * Revision 1.139 2007/07/14 07:46:41 fabiankeil
420 * - Allow to rewrite the request destination behind the client's back.
421 * - Turn the weird-looking unconditional for loop that
422 * reads the client request into a conditional while loop.
423 * Move the stuff that only runs once out of the loop.
424 * - Move parts of chat(), server_content_type() and the
425 * necessary stuff to fix BR#1750917 into get_filter_function().
427 * Revision 1.138 2007/06/03 18:45:18 fabiankeil
428 * Temporary workaround for BR#1730105.
430 * Revision 1.137 2007/06/01 18:16:36 fabiankeil
431 * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
432 * deadlocks and crashes on OpenBSD and possibly other OS with neither
433 * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
434 * Thanks to Ralf Horstmann for report and solution.
436 * Revision 1.136 2007/06/01 16:41:11 fabiankeil
437 * Add forward-override{} to change the forwarding settings through
438 * action sections. This is mainly interesting to forward different
439 * clients differently (for example based on User-Agent or request
442 * Revision 1.135 2007/05/24 17:03:50 fabiankeil
443 * - Let usage() mention the --chroot parameter.
444 * - Use read_socket() consistently and always leave
445 * the last buffer byte alone, even in cases where
446 * null termination (currently) doesn't matter.
448 * Revision 1.134 2007/05/16 14:59:46 fabiankeil
449 * - Fix config file loading on Unix if no config file is specified.
450 * Since r1.97 Privoxy would always interpret the last argument as
451 * config file, even if it's a valid command line option.
452 * - Abort in case of unrecognized command line options. Closes #1719696.
453 * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
454 * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
456 * Revision 1.133 2007/05/04 11:23:19 fabiankeil
457 * - Don't rerun crunchers that only depend on the request URL.
458 * - Don't count redirects and CGI requests as "blocked requests".
460 * Revision 1.132 2007/04/25 15:15:17 fabiankeil
461 * Support crunching based on tags created by server-header taggers.
463 * Revision 1.131 2007/04/22 13:24:50 fabiankeil
464 * Make HTTP snippets static (again). Add a Content-Type for those
465 * with content so the browser doesn't guess it based on the URL.
467 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
468 * Move crunching and request line rebuilding out of chat().
470 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
471 * Introduce tags as alternative way to specify which
472 * actions apply to a request. At the moment tags can be
473 * created based on client and server headers.
475 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
476 * Don't CLF-log CONNECT requests twice.
478 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
479 * Log the source address for ACL-related connection drops.
481 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
482 * New config option: enforce-blocks.
484 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
485 * - Move null byte check into separate function.
486 * - Don't confuse the client with error pages
487 * if a CONNECT request was already confirmed.
489 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
490 * Speed up NULL byte escaping and only log the complete
491 * NULL byte requests with header debugging enabled.
493 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
494 * Answer requests that contain NULL bytes with
495 * a custom response instead of waiting for more
496 * data until the client eventually hangs up.
498 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
499 * - Move delivery and logging of crunched responses
500 * from chat() into send_crunch_response().
501 * - Display the reason for generating http_responses.
502 * - Log the content length for LOG_LEVEL_CLF correctly
503 * (still incorrect for some fixed responses).
504 * - Reword an incorrect comment about
505 * treat-forbidden-connects-like-blocks violating
507 * - Add some log messages.
509 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
510 * Move mutex initialization into separate
511 * function and exit in case of errors.
513 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
514 * - Start to reduce chat()'s line count and move
515 * parts of it into separate functions.
516 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
518 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
519 * - Add Proxy-Agent header to HTTP snippets that are
520 * supposed to reach HTTP clients only.
521 * - Made a few CONNECT log messages more descriptive.
522 * - Catch completely empty server responses (as seen
523 * with Tor's fake ".noconnect" top level domain).
524 * - Use shiny new "forwarding-failed" template for socks errors.
526 * Revision 1.118 2007/01/07 07:43:43 joergs
527 * AmigaOS4 support added.
529 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
530 * Added config option accept-intercepted-requests
531 * and disabled it by default.
533 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
534 * Reverted parts of my last commit
535 * to keep error handling working.
537 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
538 * Fixed gcc43 conversion warnings.
540 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
541 * Fix -pedantic ISO C warning about converting
542 * from function pointer to object pointer.
544 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
545 * Silence compiler warning I introduced with my last commit.
547 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
548 * Mutex protect rand() if POSIX threading
549 * is used, warn the user if that's not possible
550 * and stop using it on _WIN32 where it could
553 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
554 * Don't prevent core dumps by catching SIGABRT.
555 * It's rude and makes debugging unreasonable painful.
557 * Revision 1.110 2006/12/13 14:52:53 etresoft
558 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
560 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
561 * Privoxy is now able to run as intercepting
562 * proxy in combination with any packet filter
563 * that does the port redirection. The destination
564 * is extracted from the "Host:" header which
565 * should be available for nearly all requests.
567 * Moved HTTP snipplets into jcc.c.
568 * Added error message for gopher proxy requests.
570 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
571 * Only unlink the pidfile if it's actually used.
573 * Change order of interception checks to make
574 * it possible to block or redirect requests for
577 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
578 * Make pthread mutex locking more generic. Instead of
579 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
580 * and use mutex locking unless there is an _r function
581 * available. Better safe than sorry.
583 * Fixes "./configure --disable-pthread" and should result
584 * in less threading-related problems on pthread-using platforms,
585 * but it still doesn't fix BR#1122404.
587 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
588 * Move pthread.h inclusion from jcc.c to jcc.h.
589 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
591 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
592 * Don't exit after receiving the second SIGHUP on Solaris.
594 * Fixes BR 1052235, but the same problem may exist on other
595 * systems. Once 3.0.6 is out we should use sigset()
596 * where available and see if it breaks anything.
598 * Revision 1.104 2006/09/23 13:26:38 roro
599 * Replace TABs by spaces in source code.
601 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
602 * Fix +redirect{}. Didn't work with -fast-redirects.
604 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
605 * Respond with 400 and a short text message
606 * if the client tries to use Privoxy as FTP proxy.
608 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
609 * Make number of retries in case of forwarded-connect problems
610 * a config file option (forwarded-connect-retries) and use 0 as
613 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
614 * Set random(3) seed.
616 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
617 * Follow the OpenBSD port's lead and protect the resolve
618 * functions on OpenBSD as well.
620 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
621 * --user fix. Only use the user as group if no group is specified.
622 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
624 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
625 * Windows service (re-)integration
629 * --install[:service_name]
630 * --uninstall[:service_name]
633 * They work as follows:
634 * --install will create a service for you and then terminate.
635 * By default the service name will be "privoxy" (without the quotes).
636 * However you can run multiple services if you wish, just by adding
637 * a colon and then a name (no spaces).
639 * --uninstall follows the exact same rules a --install.
641 * --service is used when the program is executed by the service
642 * control manager, and in normal circumstances would never be
643 * used as a command line argument.
645 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
646 * Windows service integration
648 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
649 * Incorporate Fabian Keil's patch work:
650 http://www.fabiankeil.de/sourcecode/privoxy/
652 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
653 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
654 * with what was really the latest development (the v_3_0_branch branch)
656 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
657 * Thanks to Jindrich Makovicka for a race condition fix for the log
658 * file. The race condition remains for non-pthread implementations.
659 * Reference patch #1175720.
661 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
662 * Add the ability to check jpeg images for invalid
663 * lengths of comment blocks. Defensive strategy
664 * against the exploit:
665 * Microsoft Security Bulletin MS04-028
666 * Buffer Overrun in JPEG Processing (GDI+) Could
667 * Allow Code Execution (833987)
668 * Enabled with +inspect-jpegs in actions files.
670 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
671 * - Fixed usage info for non-unix platforms
672 * - Fixed small cmdline parsing bug
674 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
675 * Diagnostics: Now preserve the returncode of pthread_create
676 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
678 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
679 * No longer ignore SIGCHLD. Fixes bug #769381
681 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
682 * Close jarfile on graceful exit, remove stray line
684 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
685 * Cosmetics: Killed a warning, a typo and an allocation left at exit
687 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
688 * No longer rely on non-POSIX.1 extensions of getcwd().
691 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
692 * Replaced setenv() by posix-compliant putenv()
693 * Thanks to Neil McCalden (nmcc AT users.sf.net).
695 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
696 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
698 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
699 * Clean-up and extension of improvements for forked mode:
700 * - Child's return code now consists of flags RC_FLAG_*
701 * - Reporting toggle to parent now properly #ifdef'ed
702 * - Children now report blocking to parent. This enables
703 * statistics in forked mode
705 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
706 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
707 * Children now report having been toggled through _exit(17), parents
708 * watch for that code and toggle themselves if found.
710 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
711 * Wrapping all *_r functions (the non-_r versions of them) with
712 * mutex semaphores for OSX. Hopefully this will take care of all
713 * of those pesky crash reports.
715 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
716 * Fixed two mostly harmless mem leaks
718 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
719 * Fix: Head of global clients list now initialized to NULL
721 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
722 * Added basic support for OPTIONS and TRACE HTTP methods:
723 * - New interceptor direct_response() added in chat().
724 * - sed() moved to earlier in the process, so that the
725 * Host: header is evaluated before actions and forwarding
728 * Revision 1.92 2002/05/08 16:00:46 oes
729 * Chat's buffer handling:
730 * - Fixed bug with unchecked out-of-mem conditions
731 * while reading client request & server headers
732 * - No longer predict if the buffer limit will be exceeded
733 * in the next read -- check add_to_iob's new
734 * return code. If buffer couldn't be extended
735 * (policy or out-of-mem) while
736 * - reading from client: abort
737 * - reading server headers: send error page
738 * - buffering server body for filter: flush,
739 * and if that fails: send error page
741 * Revision 1.91 2002/04/08 20:35:58 swa
744 * Revision 1.90 2002/04/02 14:57:28 oes
745 * Made sending wafers independent of FEATURE_COOKIE_JAR
747 * Revision 1.89 2002/03/31 17:18:59 jongfoster
748 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
750 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
751 * More compiler warning message maintenance
753 * Revision 1.87 2002/03/26 22:29:54 swa
754 * we have a new homepage!
756 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
757 * Workaround for closing the jarfile before load_config() comes around again
759 * Revision 1.85 2002/03/24 15:23:33 jongfoster
762 * Revision 1.84 2002/03/24 13:25:43 swa
763 * name change related issues
765 * Revision 1.83 2002/03/16 23:54:06 jongfoster
766 * Adding graceful termination feature, to help look for memory leaks.
767 * If you enable this (which, by design, has to be done by hand
768 * editing config.h) and then go to http://i.j.b/die, then the program
769 * will exit cleanly after the *next* request. It should free all the
770 * memory that was used.
772 * Revision 1.82 2002/03/13 00:27:05 jongfoster
775 * Revision 1.81 2002/03/12 01:42:50 oes
776 * Introduced modular filters
778 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
779 * OS/2 port maintenance:
780 * - Fixed EMX build - it had decayed a little
781 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
782 * substituted a memset for now.
784 * Revision 1.79 2002/03/09 20:03:52 jongfoster
785 * - Making various functions return int rather than size_t.
786 * (Undoing a recent change). Since size_t is unsigned on
787 * Windows, functions like read_socket that return -1 on
788 * error cannot return a size_t.
790 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
791 * crashes, and also frequently caused JB to jump to 100%
792 * CPU and stay there. (Because it thought it had just
793 * read ((unsigned)-1) == 4Gb of data...)
795 * - The signature of write_socket has changed, it now simply
796 * returns success=0/failure=nonzero.
798 * - Trying to get rid of a few warnings --with-debug on
799 * Windows, I've introduced a new type "jb_socket". This is
800 * used for the socket file descriptors. On Windows, this
801 * is SOCKET (a typedef for unsigned). Everywhere else, it's
802 * an int. The error value can't be -1 any more, so it's
803 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
804 * Windows it maps to the #define INVALID_SOCKET.)
806 * - The signature of bind_port has changed.
808 * Revision 1.78 2002/03/08 21:35:04 oes
809 * Added optional group supplement to --user option. Will now use default group of user if no group given
811 * Revision 1.77 2002/03/07 03:52:06 oes
812 * - Fixed compiler warnings etc
813 * - Improved handling of failed DNS lookups
815 * Revision 1.76 2002/03/06 22:54:35 jongfoster
816 * Automated function-comment nitpicking.
818 * Revision 1.75 2002/03/06 10:02:19 oes
819 * Fixed stupid bug when --user was not given
821 * Revision 1.74 2002/03/06 00:49:31 jongfoster
822 * Fixing warning on Windows
823 * Making #ifdefs that refer to the same variable consistently
824 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
826 * Revision 1.73 2002/03/05 23:57:30 hal9
827 * Stray character 's' on line 1618 was breaking build.
829 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
830 * - Re-enable OS/2 building after new parms were added
831 * - Fix false out of memory report when resolving CGI templates when no IP
832 * address is available of failed attempt (a la no such domain)
834 * Revision 1.71 2002/03/05 18:13:56 oes
835 * Added --user option
837 * Revision 1.70 2002/03/05 04:52:42 oes
838 * Deleted non-errlog debugging code
840 * Revision 1.69 2002/03/04 23:50:00 jongfoster
841 * Splitting off bind_port() call into bind_port_helper(), with
844 * Revision 1.68 2002/03/04 20:17:32 oes
847 * Revision 1.67 2002/03/04 18:18:57 oes
848 * - Removed _DEBUG mode
849 * - Cleand up cmdline parsing
850 * - Introduced --no-daemon, --pidfile options
851 * - Cleaned up signal handling:
852 * - Terminate cleanly on INT, TERM and ABRT
853 * - Schedule logfile for re-opening on HUP
854 * - Ignore CHLD and PIPE
855 * - Leave the rest with their default handlers
856 * - Uniform handler registration
857 * - Added usage() function
858 * - Played styleguide police
860 * Revision 1.66 2002/03/03 15:06:55 oes
861 * Re-enabled automatic config reloading
863 * Revision 1.65 2002/03/03 14:49:11 oes
864 * Fixed CLF logging: Now uses client's original HTTP request
866 * Revision 1.64 2002/03/03 09:18:03 joergs
867 * Made jumbjuster work on AmigaOS again.
869 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
870 * Clean up a little CRLF unpleasantness that suddenly appeared
872 * Revision 1.62 2002/02/20 23:17:23 jongfoster
873 * Detecting some out-of memory conditions and exiting with a log message.
875 * Revision 1.61 2002/01/17 21:01:52 jongfoster
876 * Moving all our URL and URL pattern parsing code to urlmatch.c.
878 * Revision 1.60 2001/12/30 14:07:32 steudten
879 * - Add signal handling (unix)
880 * - Add SIGHUP handler (unix)
881 * - Add creation of pidfile (unix)
882 * - Add action 'top' in rc file (RH)
883 * - Add entry 'SIGNALS' to manpage
884 * - Add exit message to logfile (unix)
886 * Revision 1.59 2001/12/13 14:07:18 oes
887 * Fixed Bug: 503 error page now sent OK
889 * Revision 1.58 2001/11/30 23:37:24 jongfoster
890 * Renaming the Win32 config file to config.txt - this is almost the
891 * same as the corresponding UNIX name "config"
893 * Revision 1.57 2001/11/16 00:47:43 jongfoster
894 * Changing the tty-disconnection code to use setsid().
896 * Revision 1.56 2001/11/13 20:20:54 jongfoster
897 * Tabs->spaces, fixing a bug with missing {} around an if()
899 * Revision 1.55 2001/11/13 20:14:53 jongfoster
900 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
902 * Revision 1.54 2001/11/07 00:03:14 steudten
903 * Give reliable return value if an error
904 * occurs not just 0 with new daemon mode.
906 * Revision 1.53 2001/11/05 21:41:43 steudten
907 * Add changes to be a real daemon just for unix os.
908 * (change cwd to /, detach from controlling tty, set
909 * process group and session leader to the own process.
911 * Add some fatal-error log message for failed malloc().
912 * Add '-d' if compiled with 'configure --with-debug' to
913 * enable debug output.
915 * Revision 1.52 2001/10/26 20:11:20 jongfoster
916 * Fixing type mismatch
918 * Revision 1.51 2001/10/26 17:38:28 oes
921 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
922 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
923 * threads to call select() simultaneously. So, it's time to do a real, live,
924 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
925 * (native). Both versions will work, but using __OS2__ offers multi-threading.
927 * Revision 1.49 2001/10/23 21:41:35 jongfoster
928 * Added call to initialize the (statically-allocated of course)
929 * "out of memory" CGI response.
931 * Revision 1.48 2001/10/10 19:56:46 jongfoster
932 * Moving some code that wasn't cookie-related out of an #ifdef
935 * Revision 1.47 2001/10/10 16:44:36 oes
936 * Added CONNECT destination port limitation check
938 * Revision 1.46 2001/10/08 15:17:41 oes
939 * Re-enabled SSL forwarding
941 * Revision 1.45 2001/10/07 15:42:11 oes
942 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
944 * Moved downgrading of the HTTP version from parse_http_request to
945 * chat(), since we can't decide if it is necessary before we have
946 * determined the actions for the URL. The HTTP command is now
947 * *always* re-built so the repairs need no longer be special-cased.
949 * filter_popups now gets a csp pointer so it can raise the new
950 * CSP_FLAG_MODIFIED flag.
954 * Added configurable size limit for the IOB. If the IOB grows so
955 * large that the next read would exceed the limit, the header
956 * is generated, and the header & unfiltered buffer are flushed
957 * to the client. Chat then continues in non-buffering,
958 * non-filtering body mode.
960 * Revision 1.44 2001/10/02 18:13:57 oes
963 * Revision 1.43 2001/10/02 15:32:13 oes
964 * Moved generation of hdr
966 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
967 * Cleaning up 2 compiler warnings on OS/2.
969 * Revision 1.41 2001/09/16 17:05:14 jongfoster
970 * Removing unused #include showarg.h
972 * Revision 1.40 2001/09/16 15:41:45 jongfoster
973 * Fixing signed/unsigned comparison warning.
975 * Revision 1.39 2001/09/16 13:21:27 jongfoster
976 * Changes to use new list functions.
978 * Revision 1.38 2001/09/16 13:01:46 jongfoster
979 * Removing redundant function call that zeroed zalloc()'d memory.
981 * Revision 1.37 2001/09/10 11:12:24 oes
982 * Deleted unused variable
984 * Revision 1.36 2001/09/10 10:56:15 oes
985 * Silenced compiler warnings
987 * Revision 1.35 2001/07/31 14:44:22 oes
988 * Deleted unused size parameter from filter_popups()
990 * Revision 1.34 2001/07/30 22:08:36 jongfoster
991 * Tidying up #defines:
992 * - All feature #defines are now of the form FEATURE_xxx
993 * - Permanently turned off WIN_GUI_EDIT
994 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
996 * Revision 1.33 2001/07/29 19:32:00 jongfoster
997 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
999 * Revision 1.32 2001/07/29 18:47:05 jongfoster
1000 * Adding missing #include "loadcfg.h"
1002 * Revision 1.31 2001/07/29 12:17:48 oes
1003 * Applied pthread fix by Paul Lieverse
1005 * Revision 1.30 2001/07/25 22:57:13 jongfoster
1006 * __BEOS__ no longer overrides FEATURE_PTHREAD.
1007 * This is because FEATURE_PTHREAD will soon be widely used, so I
1008 * want to keep it simple.
1010 * Revision 1.29 2001/07/24 12:47:06 oes
1011 * Applied BeOS support update by Eugenia
1013 * Revision 1.28 2001/07/23 13:26:12 oes
1014 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
1016 * Revision 1.27 2001/07/19 19:09:47 haroon
1017 * - Added code to take care of the situation where while processing the first
1018 * server response (which includes the server header), after finding the end
1019 * of the headers we were not looking past the end of the headers for
1020 * content modification. I enabled it for filter_popups.
1021 * Someone else should look to see if other similar operations should be
1022 * done to the discarded portion of the buffer.
1024 * Note 2001/07/20: No, the other content modification mechanisms will process
1025 * the whole iob later anyway. --oes
1027 * Revision 1.26 2001/07/18 12:31:36 oes
1030 * Revision 1.25 2001/07/15 19:43:49 jongfoster
1031 * Supports POSIX threads.
1032 * Also removed some unused #includes.
1034 * Revision 1.24 2001/07/13 14:00:40 oes
1035 * - Generic content modification scheme:
1036 * Each feature has its own applicability flag that is set
1037 * from csp->action->flags.
1038 * Replaced the "filtering" int flag , by a function pointer
1039 * "content_filter" to the function that will do the content
1040 * modification. If it is != NULL, the document will be buffered
1041 * and processed through *content_filter, which must set
1042 * csp->content_length and return a modified copy of the body
1043 * or return NULL (on failiure).
1044 * - Changed csp->is_text to the more generic bitmap csp->content_type
1045 * which can currently take the valued CT_TEXT or CT_GIF
1046 * - Reformatting etc
1047 * - Removed all #ifdef PCRS
1049 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
1050 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
1051 * the `block_acl' call. This prevents a compilation error when the user
1052 * does not wish to use the "ACL" feature.
1054 * Revision 1.22 2001/06/29 21:45:41 oes
1055 * Indentation, CRLF->LF, Tab-> Space
1057 * Revision 1.21 2001/06/29 13:29:36 oes
1058 * - Cleaned up, improved comments
1059 * - Unified all possible interceptors (CGI,
1060 * block, trust, fast_redirect) in one
1061 * place, with one (CGI) answer generation
1062 * mechansim. Much clearer now.
1063 * - Removed the GIF image generation, which
1064 * is now done in filters.c:block_url()
1065 * - Made error conditions like domain lookup
1066 * failiure or (various) problems while talking
1067 * to the server use cgi.c:error_response()
1068 * instead of generating HTML/HTTP in chat() (yuck!)
1069 * - Removed logentry from cancelled commit
1071 * Revision 1.20 2001/06/09 10:55:28 jongfoster
1072 * Changing BUFSIZ ==> BUFFER_SIZE
1074 * Revision 1.19 2001/06/07 23:12:52 jongfoster
1075 * Replacing function pointer in struct gateway with a directly
1076 * called function forwarded_connect().
1077 * Replacing struct gateway with struct forward_spec
1079 * Revision 1.18 2001/06/03 19:12:16 oes
1080 * introduced new cgi handling
1082 * Revision 1.17 2001/06/01 20:07:23 jongfoster
1083 * Now uses action +image-blocker{} rather than config->tinygif
1085 * Revision 1.16 2001/06/01 18:49:17 jongfoster
1086 * Replaced "list_share" with "list" - the tiny memory gain was not
1087 * worth the extra complexity.
1089 * Revision 1.15 2001/05/31 21:24:47 jongfoster
1090 * Changed "permission" to "action" throughout.
1091 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
1092 * Moved vanilla wafer check into chat(), since we must now
1093 * decide whether or not to add it based on the URL.
1095 * Revision 1.14 2001/05/29 20:14:01 joergs
1096 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
1099 * Revision 1.13 2001/05/29 09:50:24 jongfoster
1100 * Unified blocklist/imagelist/permissionslist.
1101 * File format is still under discussion, but the internal changes
1102 * are (mostly) done.
1104 * Also modified interceptor behaviour:
1105 * - We now intercept all URLs beginning with one of the following
1106 * prefixes (and *only* these prefixes):
1108 * * http://ijbswa.sf.net/config/
1109 * * http://ijbswa.sourceforge.net/config/
1110 * - New interceptors "home page" - go to http://i.j.b/ to see it.
1111 * - Internal changes so that intercepted and fast redirect pages
1112 * are not replaced with an image.
1113 * - Interceptors now have the option to send a binary page direct
1114 * to the client. (i.e. ijb-send-banner uses this)
1115 * - Implemented show-url-info interceptor. (Which is why I needed
1116 * the above interceptors changes - a typical URL is
1117 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
1118 * The previous mechanism would not have intercepted that, and
1119 * if it had been intercepted then it then it would have replaced
1120 * it with an image.)
1122 * Revision 1.12 2001/05/27 22:17:04 oes
1124 * - re_process_buffer no longer writes the modified buffer
1125 * to the client, which was very ugly. It now returns the
1126 * buffer, which it is then written by chat.
1128 * - content_length now adjusts the Content-Length: header
1129 * for modified documents rather than crunch()ing it.
1130 * (Length info in csp->content_length, which is 0 for
1131 * unmodified documents)
1133 * - For this to work, sed() is called twice when filtering.
1135 * Revision 1.11 2001/05/26 17:27:53 jongfoster
1136 * Added support for CLF and fixed LOG_LEVEL_LOG.
1137 * Also did CRLF->LF fix of my previous patch.
1139 * Revision 1.10 2001/05/26 15:26:15 jongfoster
1140 * ACL feature now provides more security by immediately dropping
1141 * connections from untrusted hosts.
1143 * Revision 1.9 2001/05/26 00:28:36 jongfoster
1144 * Automatic reloading of config file.
1145 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
1146 * Most of the global variables have been moved to a new
1147 * struct configuration_spec, accessed through csp->config->globalname
1148 * Most of the globals remaining are used by the Win32 GUI.
1150 * Revision 1.8 2001/05/25 22:43:18 jongfoster
1151 * Fixing minor memory leak and buffer overflow.
1153 * Revision 1.7 2001/05/25 22:34:30 jongfoster
1156 * Revision 1.6 2001/05/23 00:13:58 joergs
1157 * AmigaOS support fixed.
1159 * Revision 1.5 2001/05/22 18:46:04 oes
1161 * - Enabled filtering banners by size rather than URL
1162 * by adding patterns that replace all standard banner
1163 * sizes with the "Junkbuster" gif to the re_filterfile
1165 * - Enabled filtering WebBugs by providing a pattern
1166 * which kills all 1x1 images
1168 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
1169 * which is selected by the (nonstandard and therefore
1170 * capital) letter 'U' in the option string.
1171 * It causes the quantifiers to be ungreedy by default.
1172 * Appending a ? turns back to greedy (!).
1174 * - Added a new interceptor ijb-send-banner, which
1175 * sends back the "Junkbuster" gif. Without imagelist or
1176 * MSIE detection support, or if tinygif = 1, or the
1177 * URL isn't recognized as an imageurl, a lame HTML
1178 * explanation is sent instead.
1180 * - Added new feature, which permits blocking remote
1181 * script redirects and firing back a local redirect
1183 * The feature is conditionally compiled, i.e. it
1184 * can be disabled with --disable-fast-redirects,
1185 * plus it must be activated by a "fast-redirects"
1186 * line in the config file, has its own log level
1187 * and of course wants to be displayed by show-proxy-args
1188 * Note: Boy, all the #ifdefs in 1001 locations and
1189 * all the fumbling with configure.in and acconfig.h
1190 * were *way* more work than the feature itself :-(
1192 * - Because a generic redirect template was needed for
1193 * this, tinygif = 3 now uses the same.
1195 * - Moved GIFs, and other static HTTP response templates
1198 * - Some minor fixes
1200 * - Removed some >400 CRs again (Jon, you really worked
1203 * Revision 1.4 2001/05/21 19:34:01 jongfoster
1204 * Made failure to bind() a fatal error.
1206 * Revision 1.3 2001/05/20 01:21:20 jongfoster
1207 * Version 2.9.4 checkin.
1208 * - Merged popupfile and cookiefile, and added control over PCRS
1209 * filtering, in new "permissionsfile".
1210 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
1211 * file error you now get a message box (in the Win32 GUI) rather
1212 * than the program exiting with no explanation.
1213 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
1215 * - Removed tabs from "config"
1216 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
1217 * - Bumped up version number.
1219 * Revision 1.2 2001/05/17 22:34:44 oes
1220 * - Added hint on GIF char array generation to jcc.c
1221 * - Cleaned CRLF's from the sources and related files
1222 * - Repaired logging for REF and FRC
1224 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
1225 * Initial import of version 2.9.3 source tree
1228 *********************************************************************/
1234 #include <sys/types.h>
1243 # ifndef FEATURE_PTHREAD
1247 # include <windows.h>
1248 # include <process.h>
1249 # endif /* ndef FEATURE_PTHREAD */
1252 # ifndef _WIN_CONSOLE
1253 # include "w32log.h"
1254 # endif /* ndef _WIN_CONSOLE */
1255 # include "w32svrapi.h"
1257 #else /* ifndef _WIN32 */
1259 # if !defined (__OS2__)
1260 # include <unistd.h>
1261 # include <sys/wait.h>
1262 # endif /* ndef __OS2__ */
1263 # include <sys/time.h>
1264 # include <sys/stat.h>
1265 # include <sys/ioctl.h>
1268 #include <sys/termios.h>
1276 # include <signal.h>
1279 # include <socket.h> /* BeOS has select() for sockets only. */
1280 # include <OS.h> /* declarations for threads and stuff. */
1283 # if defined(__EMX__) || defined(__OS2__)
1284 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
1289 #define bzero(B,N) memset(B,0x00,n)
1293 # include <select.h>
1298 #include "project.h"
1301 #include "filters.h"
1302 #include "loaders.h"
1303 #include "parsers.h"
1304 #include "miscutil.h"
1306 #include "jbsockets.h"
1307 #include "gateway.h"
1308 #include "actions.h"
1310 #include "loadcfg.h"
1311 #include "urlmatch.h"
1313 const char jcc_h_rcs[] = JCC_H_VERSION;
1314 const char project_h_rcs[] = PROJECT_H_VERSION;
1317 struct client_state clients[1];
1318 struct file_list files[1];
1320 #ifdef FEATURE_STATISTICS
1321 int urls_read = 0; /* total nr of urls read inc rejected */
1322 int urls_rejected = 0; /* total nr of urls rejected */
1323 #endif /* def FEATURE_STATISTICS */
1325 #ifdef FEATURE_GRACEFUL_TERMINATION
1326 int g_terminate = 0;
1329 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1330 static void sig_handler(int the_signal);
1332 static int client_protocol_is_unsupported(const struct client_state *csp, char *req);
1333 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers);
1334 static jb_err get_server_headers(struct client_state *csp);
1335 static const char *crunch_reason(const struct http_response *rsp);
1336 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp);
1337 static char *get_request_line(struct client_state *csp);
1338 static jb_err receive_client_request(struct client_state *csp);
1339 static jb_err parse_client_request(struct client_state *csp);
1340 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line);
1341 static jb_err change_request_destination(struct client_state *csp);
1342 static void chat(struct client_state *csp);
1343 static void serve(struct client_state *csp);
1344 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1345 static void usage(const char *myname);
1347 static void initialize_mutexes(void);
1348 static jb_socket bind_port_helper(struct configuration_spec *config);
1349 static void listen_loop(void);
1352 void serve(struct client_state *csp);
1353 #else /* ifndef AMIGA */
1354 static void serve(struct client_state *csp);
1355 #endif /* def AMIGA */
1358 static int32 server_thread(void *data);
1359 #endif /* def __BEOS__ */
1362 #define sleep(N) Sleep(((N) * 1000))
1366 #define sleep(N) DosSleep(((N) * 100))
1369 #ifdef MUTEX_LOCKS_AVAILABLE
1371 * XXX: Does the locking stuff really belong in this file?
1373 privoxy_mutex_t log_mutex;
1374 privoxy_mutex_t log_init_mutex;
1375 privoxy_mutex_t connection_reuse_mutex;
1377 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
1378 privoxy_mutex_t resolver_mutex;
1379 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
1381 #ifndef HAVE_GMTIME_R
1382 privoxy_mutex_t gmtime_mutex;
1383 #endif /* ndef HAVE_GMTIME_R */
1385 #ifndef HAVE_LOCALTIME_R
1386 privoxy_mutex_t localtime_mutex;
1387 #endif /* ndef HAVE_GMTIME_R */
1390 privoxy_mutex_t rand_mutex;
1391 #endif /* ndef HAVE_RANDOM */
1393 #endif /* def MUTEX_LOCKS_AVAILABLE */
1396 const char *basedir = NULL;
1397 const char *pidfile = NULL;
1398 static int received_hup_signal = 0;
1399 #endif /* defined unix */
1401 /* HTTP snipplets. */
1402 static const char CSUCCEED[] =
1403 "HTTP/1.0 200 Connection established\r\n"
1404 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
1406 static const char CHEADER[] =
1407 "HTTP/1.0 400 Invalid header received from client\r\n"
1408 "Proxy-Agent: Privoxy " VERSION "\r\n"
1409 "Content-Type: text/plain\r\n"
1410 "Connection: close\r\n\r\n"
1411 "Invalid header received from client.\r\n";
1413 static const char FTP_RESPONSE[] =
1414 "HTTP/1.0 400 Invalid request received from client\r\n"
1415 "Content-Type: text/plain\r\n"
1416 "Connection: close\r\n\r\n"
1417 "Invalid request. Privoxy doesn't support FTP.\r\n";
1419 static const char GOPHER_RESPONSE[] =
1420 "HTTP/1.0 400 Invalid request received from client\r\n"
1421 "Content-Type: text/plain\r\n"
1422 "Connection: close\r\n\r\n"
1423 "Invalid request. Privoxy doesn't support gopher.\r\n";
1425 /* XXX: should be a template */
1426 static const char MISSING_DESTINATION_RESPONSE[] =
1427 "HTTP/1.0 400 Bad request received from client\r\n"
1428 "Proxy-Agent: Privoxy " VERSION "\r\n"
1429 "Content-Type: text/plain\r\n"
1430 "Connection: close\r\n\r\n"
1431 "Bad request. Privoxy was unable to extract the destination.\r\n";
1433 /* XXX: should be a template */
1434 static const char NO_SERVER_DATA_RESPONSE[] =
1435 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1436 "Proxy-Agent: Privoxy " VERSION "\r\n"
1437 "Content-Type: text/plain\r\n"
1438 "Connection: close\r\n\r\n"
1439 "Empty server or forwarder response.\r\n"
1440 "The connection has been closed but Privoxy didn't receive any data.\r\n";
1442 /* XXX: should be a template */
1443 static const char INVALID_SERVER_HEADERS_RESPONSE[] =
1444 "HTTP/1.0 502 Server or forwarder response invalid\r\n"
1445 "Proxy-Agent: Privoxy " VERSION "\r\n"
1446 "Content-Type: text/plain\r\n"
1447 "Connection: close\r\n\r\n"
1448 "Bad response. The server or forwarder response doesn't look like HTTP.\r\n";
1451 /* XXX: should be a template */
1452 static const char NULL_BYTE_RESPONSE[] =
1453 "HTTP/1.0 400 Bad request received from client\r\n"
1454 "Proxy-Agent: Privoxy " VERSION "\r\n"
1455 "Content-Type: text/plain\r\n"
1456 "Connection: close\r\n\r\n"
1457 "Bad request. Null byte(s) before end of request.\r\n";
1460 /* XXX: should be a template */
1461 static const char MESSED_UP_REQUEST_RESPONSE[] =
1462 "HTTP/1.0 400 Malformed request after rewriting\r\n"
1463 "Proxy-Agent: Privoxy " VERSION "\r\n"
1464 "Content-Type: text/plain\r\n"
1465 "Connection: close\r\n\r\n"
1466 "Bad request. Messed up with header filters.\r\n";
1468 /* XXX: should be a template */
1469 static const char CONNECTION_TIMEOUT_RESPONSE[] =
1470 "HTTP/1.0 502 Connection timeout\r\n"
1471 "Proxy-Agent: Privoxy " VERSION "\r\n"
1472 "Content-Type: text/plain\r\n"
1473 "Connection: close\r\n\r\n"
1474 "The connection timed out.\r\n";
1476 /* A function to crunch a response */
1477 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
1479 /* Crunch function flags */
1480 #define CF_NO_FLAGS 0
1481 /* Cruncher applies to forced requests as well */
1482 #define CF_IGNORE_FORCE 1
1483 /* Crunched requests are counted for the block statistics */
1484 #define CF_COUNT_AS_REJECT 2
1486 /* A crunch function and its flags */
1489 const crunch_func_ptr cruncher;
1493 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[]);
1495 /* Complete list of cruncher functions */
1496 static const struct cruncher crunchers_all[] = {
1497 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
1498 { block_url, CF_COUNT_AS_REJECT },
1499 #ifdef FEATURE_TRUST
1500 { trust_url, CF_COUNT_AS_REJECT },
1501 #endif /* def FEATURE_TRUST */
1502 { redirect_url, CF_NO_FLAGS },
1503 { dispatch_cgi, CF_IGNORE_FORCE},
1507 /* Light version, used after tags are applied */
1508 static const struct cruncher crunchers_light[] = {
1509 { block_url, CF_COUNT_AS_REJECT },
1510 { redirect_url, CF_NO_FLAGS },
1516 * XXX: Don't we really mean
1522 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1523 /*********************************************************************
1525 * Function : sig_handler
1527 * Description : Signal handler for different signals.
1528 * Exit gracefully on TERM and INT
1529 * or set a flag that will cause the errlog
1530 * to be reopened by the main thread on HUP.
1533 * 1 : the_signal = the signal cause this function to call
1537 *********************************************************************/
1538 static void sig_handler(int the_signal)
1544 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1556 received_hup_signal = 1;
1562 * We shouldn't be here, unless we catch signals
1563 * in main() that we can't handle here!
1565 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1573 /*********************************************************************
1575 * Function : client_protocol_is_unsupported
1577 * Description : Checks if the client used a known unsupported
1578 * protocol and deals with it by sending an error
1582 * 1 : csp = Current client state (buffers, headers, etc...)
1583 * 2 : req = the first request line send by the client
1585 * Returns : TRUE if an error response has been generated, or
1586 * FALSE if the request doesn't look invalid.
1588 *********************************************************************/
1589 static int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1592 * If it's a FTP or gopher request, we don't support it.
1594 * These checks are better than nothing, but they might
1595 * not work in all configurations and some clients might
1596 * have problems digesting the answer.
1598 * They should, however, never cause more problems than
1599 * Privoxy's old behaviour (returning the misleading HTML
1602 * "Could not resolve http://(ftp|gopher)://example.org").
1604 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1606 const char *response = NULL;
1607 const char *protocol = NULL;
1609 if (!strncmpic(req, "GET ftp://", 10))
1611 response = FTP_RESPONSE;
1616 response = GOPHER_RESPONSE;
1617 protocol = "GOPHER";
1619 log_error(LOG_LEVEL_ERROR,
1620 "%s tried to use Privoxy as %s proxy: %s",
1621 csp->ip_addr_str, protocol, req);
1622 log_error(LOG_LEVEL_CLF,
1623 "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1625 write_socket(csp->cfd, response, strlen(response));
1634 /*********************************************************************
1636 * Function : get_request_destination_elsewhere
1638 * Description : If the client's request was redirected into
1639 * Privoxy without the client's knowledge,
1640 * the request line lacks the destination host.
1642 * This function tries to get it elsewhere,
1643 * provided accept-intercepted-requests is enabled.
1645 * "Elsewhere" currently only means "Host: header",
1646 * but in the future we may ask the redirecting
1647 * packet filter to look the destination up.
1649 * If the destination stays unknown, an error
1650 * response is send to the client and headers
1651 * are freed so that chat() can return directly.
1654 * 1 : csp = Current client state (buffers, headers, etc...)
1655 * 2 : headers = a header list
1657 * Returns : JB_ERR_OK if the destination is now known, or
1658 * JB_ERR_PARSE if it isn't.
1660 *********************************************************************/
1661 static jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1665 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1667 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1668 " Privoxy isn't configured to accept intercepted requests.",
1669 csp->ip_addr_str, csp->http->cmd);
1670 /* XXX: Use correct size */
1671 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1672 csp->ip_addr_str, csp->http->cmd);
1674 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1675 destroy_list(headers);
1677 return JB_ERR_PARSE;
1679 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1681 /* Split the domain we just got for pattern matching */
1682 init_domain_components(csp->http);
1688 /* We can't work without destination. Go spread the news.*/
1690 req = list_to_text(headers);
1692 /* XXX: Use correct size */
1693 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1694 csp->ip_addr_str, csp->http->cmd);
1695 log_error(LOG_LEVEL_ERROR,
1696 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1697 csp->ip_addr_str, csp->http->cmd, req);
1700 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
1701 destroy_list(headers);
1703 return JB_ERR_PARSE;
1706 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1707 * to get the destination IP address, use it as host directly
1708 * or do a reverse DNS lookup first.
1713 /*********************************************************************
1715 * Function : get_server_headers
1717 * Description : Parses server headers in iob and fills them
1718 * into csp->headers so that they can later be
1722 * 1 : csp = Current client state (buffers, headers, etc...)
1724 * Returns : JB_ERR_OK if everything went fine, or
1725 * JB_ERR_PARSE if the headers were incomplete.
1727 *********************************************************************/
1728 static jb_err get_server_headers(struct client_state *csp)
1730 int continue_hack_in_da_house = 0;
1733 while (((header = get_header(csp->iob)) != NULL) || continue_hack_in_da_house)
1738 * continue hack in da house. Ignore the ending of
1739 * this head and continue enlisting header lines.
1740 * The reason is described below.
1742 enlist(csp->headers, "");
1743 continue_hack_in_da_house = 0;
1746 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1749 * It's a bodyless continue response, don't
1750 * stop header parsing after reaching its end.
1752 * As a result Privoxy will concatenate the
1753 * next response's head and parse and deliver
1754 * the headers as if they belonged to one request.
1756 * The client will separate them because of the
1757 * empty line between them.
1759 * XXX: What we're doing here is clearly against
1760 * the intended purpose of the continue header,
1761 * and under some conditions (HTTP/1.0 client request)
1762 * it's a standard violation.
1764 * Anyway, "sort of against the spec" is preferable
1765 * to "always getting confused by Continue responses"
1766 * (Privoxy's behaviour before this hack was added)
1768 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1769 continue_hack_in_da_house = 1;
1771 else if (*header == '\0')
1774 * If the header is empty, but the Continue hack
1775 * isn't active, we can assume that we reached the
1776 * end of the buffer before we hit the end of the
1779 * Inform the caller an let it decide how to handle it.
1781 return JB_ERR_PARSE;
1784 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1787 * XXX: Should we quit the request and return a
1788 * out of memory error page instead?
1790 log_error(LOG_LEVEL_ERROR,
1791 "Out of memory while enlisting server headers. %s lost.",
1801 /*********************************************************************
1803 * Function : crunch_reason
1805 * Description : Translates the crunch reason code into a string.
1808 * 1 : rsp = a http_response
1810 * Returns : A string with the crunch reason or an error description.
1812 *********************************************************************/
1813 static const char *crunch_reason(const struct http_response *rsp)
1815 char * reason = NULL;
1817 assert(rsp != NULL);
1820 return "Internal error while searching for crunch reason";
1823 switch (rsp->reason)
1825 case RSP_REASON_UNSUPPORTED:
1826 reason = "Unsupported HTTP feature";
1828 case RSP_REASON_BLOCKED:
1831 case RSP_REASON_UNTRUSTED:
1832 reason = "Untrusted";
1834 case RSP_REASON_REDIRECTED:
1835 reason = "Redirected";
1837 case RSP_REASON_CGI_CALL:
1838 reason = "CGI Call";
1840 case RSP_REASON_NO_SUCH_DOMAIN:
1841 reason = "DNS failure";
1843 case RSP_REASON_FORWARDING_FAILED:
1844 reason = "Forwarding failed";
1846 case RSP_REASON_CONNECT_FAILED:
1847 reason = "Connection failure";
1849 case RSP_REASON_OUT_OF_MEMORY:
1850 reason = "Out of memory (may mask other reasons)";
1853 reason = "No reason recorded";
1861 /*********************************************************************
1863 * Function : send_crunch_response
1865 * Description : Delivers already prepared response for
1866 * intercepted requests, logs the interception
1867 * and frees the response.
1870 * 1 : csp = Current client state (buffers, headers, etc...)
1871 * 1 : rsp = Fully prepared response. Will be freed on exit.
1873 * Returns : Nothing.
1875 *********************************************************************/
1876 static void send_crunch_response(const struct client_state *csp, struct http_response *rsp)
1878 const struct http_request *http = csp->http;
1879 char status_code[4];
1881 assert(rsp != NULL);
1882 assert(rsp->head != NULL);
1887 * Not supposed to happen. If it does
1888 * anyway, treat it as an unknown error.
1890 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1891 /* return code doesn't matter */
1896 /* If rsp is still NULL, we have serious internal problems. */
1897 log_error(LOG_LEVEL_FATAL,
1898 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1902 * Extract the status code from the actual head
1903 * that was send to the client. It is the only
1904 * way to get it right for all requests, including
1905 * the fixed ones for out-of-memory problems.
1907 * A head starts like this: 'HTTP/1.1 200...'
1911 status_code[0] = rsp->head[9];
1912 status_code[1] = rsp->head[10];
1913 status_code[2] = rsp->head[11];
1914 status_code[3] = '\0';
1916 /* Write the answer to the client */
1917 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1918 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1920 /* There is nothing we can do about it. */
1921 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1924 /* Log that the request was crunched and why. */
1925 log_error(LOG_LEVEL_CRUNCH, "%s: %s", crunch_reason(rsp), http->url);
1926 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %u",
1927 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1929 /* Clean up and return */
1930 if (cgi_error_memory() != rsp)
1932 free_http_response(rsp);
1939 /*********************************************************************
1941 * Function : request_contains_null_bytes
1943 * Description : Checks for NULL bytes in the request and sends
1944 * an error message to the client if any were found.
1946 * XXX: currently not used, see comment in chat().
1949 * 1 : csp = Current client state (buffers, headers, etc...)
1950 * 2 : buf = Data from the client's request to check.
1951 * 3 : len = The data length.
1953 * Returns : TRUE if the request contained one or more NULL bytes, or
1956 *********************************************************************/
1957 static int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1959 size_t c_len; /* Request lenght when treated as C string */
1961 c_len = strlen(buf);
1966 * Null byte(s) found. Log the request,
1967 * return an error response and hang up.
1969 size_t tmp_len = c_len;
1974 * Replace NULL byte(s) with '°' characters
1975 * so the request can be logged as string.
1976 * XXX: Is there a better replacement character?
1979 tmp_len += strlen(buf+tmp_len);
1980 } while (tmp_len < len);
1982 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1983 "(length=%d, strlen=%u).", csp->ip_addr_str, len, c_len);
1984 log_error(LOG_LEVEL_HEADER,
1985 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1987 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
1989 /* XXX: Log correct size */
1990 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2000 /*********************************************************************
2002 * Function : crunch_response_triggered
2004 * Description : Checks if the request has to be crunched,
2005 * and delivers the crunch response if necessary.
2008 * 1 : csp = Current client state (buffers, headers, etc...)
2009 * 2 : crunchers = list of cruncher functions to run
2011 * Returns : TRUE if the request was answered with a crunch response
2014 *********************************************************************/
2015 static int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
2017 struct http_response *rsp = NULL;
2018 const struct cruncher *c;
2021 * If CGI request crunching is disabled,
2022 * check the CGI dispatcher out of order to
2023 * prevent unintentional blocks or redirects.
2025 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
2026 && (NULL != (rsp = dispatch_cgi(csp))))
2028 /* Deliver, log and free the interception response. */
2029 send_crunch_response(csp, rsp);
2033 for (c = crunchers; c->cruncher != NULL; c++)
2036 * Check the cruncher if either Privoxy is toggled
2037 * on and the request isn't forced, or if the cruncher
2038 * applies to forced requests as well.
2040 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
2041 !(csp->flags & CSP_FLAG_FORCED)) ||
2042 (c->flags & CF_IGNORE_FORCE))
2044 rsp = c->cruncher(csp);
2047 /* Deliver, log and free the interception response. */
2048 send_crunch_response(csp, rsp);
2049 #ifdef FEATURE_STATISTICS
2050 if (c->flags & CF_COUNT_AS_REJECT)
2052 csp->flags |= CSP_FLAG_REJECTED;
2054 #endif /* def FEATURE_STATISTICS */
2065 /*********************************************************************
2067 * Function : build_request_line
2069 * Description : Builds the HTTP request line.
2071 * If a HTTP forwarder is used it expects the whole URL,
2072 * web servers only get the path.
2075 * 1 : csp = Current client state (buffers, headers, etc...)
2076 * 2 : fwd = The forwarding spec used for the request
2077 * XXX: Should use http->fwd instead.
2078 * 3 : request_line = The old request line which will be replaced.
2080 * Returns : Nothing. Terminates in case of memory problems.
2082 *********************************************************************/
2083 static void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
2085 struct http_request *http = csp->http;
2087 assert(http->ssl == 0);
2090 * Downgrade http version from 1.1 to 1.0
2091 * if +downgrade action applies.
2093 if ( (csp->action->flags & ACTION_DOWNGRADE)
2094 && (!strcmpic(http->ver, "HTTP/1.1")))
2097 http->ver = strdup("HTTP/1.0");
2099 if (http->ver == NULL)
2101 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
2106 * Rebuild the request line.
2108 freez(*request_line);
2109 *request_line = strdup(http->gpc);
2110 string_append(request_line, " ");
2112 if (fwd->forward_host)
2114 string_append(request_line, http->url);
2118 string_append(request_line, http->path);
2120 string_append(request_line, " ");
2121 string_append(request_line, http->ver);
2123 if (*request_line == NULL)
2125 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
2127 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
2131 /*********************************************************************
2133 * Function : change_request_destination
2135 * Description : Parse a (rewritten) request line and regenerate
2136 * the http request data.
2139 * 1 : csp = Current client state (buffers, headers, etc...)
2141 * Returns : Forwards the parse_http_request() return code.
2142 * Terminates in case of memory problems.
2144 *********************************************************************/
2145 static jb_err change_request_destination(struct client_state *csp)
2147 struct http_request *http = csp->http;
2150 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
2151 free_http_request(http);
2152 err = parse_http_request(csp->headers->first->str, http);
2153 if (JB_ERR_OK != err)
2155 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
2156 jb_err_to_string(err));
2160 /* XXX: ocmd is a misleading name */
2161 http->ocmd = strdup(http->cmd);
2162 if (http->ocmd == NULL)
2164 log_error(LOG_LEVEL_FATAL,
2165 "Out of memory copying rewritten HTTP request line");
2173 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2174 /*********************************************************************
2176 * Function : server_response_is_complete
2178 * Description : Determines whether we should stop reading
2179 * from the server socket.
2182 * 1 : csp = Current client state (buffers, headers, etc...)
2183 * 2 : content_length = Length of content received so far.
2185 * Returns : TRUE if the response is complete,
2188 *********************************************************************/
2189 static int server_response_is_complete(struct client_state *csp,
2190 unsigned long long content_length)
2192 int content_length_known = !!(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET);
2194 if (!strcmpic(csp->http->gpc, "HEAD"))
2197 * "HEAD" implies no body, we are thus expecting
2198 * no content. XXX: incomplete "list" of methods?
2200 csp->expected_content_length = 0;
2201 content_length_known = TRUE;
2204 if (csp->http->status == 304)
2207 * Expect no body. XXX: incomplete "list" of status codes?
2209 csp->expected_content_length = 0;
2210 content_length_known = TRUE;
2213 return (content_length_known && ((0 == csp->expected_content_length)
2214 || (csp->expected_content_length <= content_length)));
2218 /*********************************************************************
2220 * Function : wait_for_alive_connections
2222 * Description : Waits for alive connections to timeout.
2228 *********************************************************************/
2229 static void wait_for_alive_connections()
2231 int connections_alive = close_unusable_connections();
2233 while (0 < connections_alive)
2235 log_error(LOG_LEVEL_CONNECT,
2236 "Waiting for %d connections to timeout.",
2239 connections_alive = close_unusable_connections();
2242 log_error(LOG_LEVEL_CONNECT, "No connections to wait for left.");
2245 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2248 /*********************************************************************
2250 * Function : mark_server_socket_tainted
2252 * Description : Makes sure we don't reuse a server socket
2253 * (if we didn't read everything the server sent
2254 * us reusing the socket would lead to garbage).
2257 * 1 : csp = Current client state (buffers, headers, etc...)
2261 *********************************************************************/
2262 static void mark_server_socket_tainted(struct client_state *csp)
2264 if ((csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
2266 log_error(LOG_LEVEL_CONNECT, "Unsetting keep-alive flag.");
2267 csp->flags &= ~CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE;
2271 /*********************************************************************
2273 * Function : get_request_line
2275 * Description : Read the client request line.
2278 * 1 : csp = Current client state (buffers, headers, etc...)
2280 * Returns : Pointer to request line or NULL in case of errors.
2282 *********************************************************************/
2283 static char *get_request_line(struct client_state *csp)
2285 char buf[BUFFER_SIZE];
2286 char *request_line = NULL;
2289 memset(buf, 0, sizeof(buf));
2293 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
2295 log_error(LOG_LEVEL_ERROR,
2296 "Stopped waiting for the request line.");
2297 write_socket(csp->cfd, CONNECTION_TIMEOUT_RESPONSE,
2298 strlen(CONNECTION_TIMEOUT_RESPONSE));
2302 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2304 if (len <= 0) return NULL;
2307 * If there is no memory left for buffering the
2308 * request, there is nothing we can do but hang up
2310 if (add_to_iob(csp, buf, len))
2315 request_line = get_header(csp->iob);
2317 } while ((NULL != request_line) && ('\0' == *request_line));
2319 return request_line;
2324 /*********************************************************************
2326 * Function : receive_client_request
2328 * Description : Read the client's request (more precisely the
2329 * client headers) and answer it if necessary.
2331 * Note that since we're not using select() we could get
2332 * blocked here if a client connected, then didn't say
2336 * 1 : csp = Current client state (buffers, headers, etc...)
2338 * Returns : JB_ERR_OK, JB_ERR_PARSE or JB_ERR_MEMORY
2340 *********************************************************************/
2341 static jb_err receive_client_request(struct client_state *csp)
2343 char buf[BUFFER_SIZE];
2346 struct http_request *http;
2350 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
2351 struct list header_list;
2352 struct list *headers = &header_list;
2356 memset(buf, 0, sizeof(buf));
2358 req = get_request_line(csp);
2361 return JB_ERR_PARSE;
2363 assert(*req != '\0');
2365 if (client_protocol_is_unsupported(csp, req))
2367 return JB_ERR_PARSE;
2370 #ifdef FEATURE_FORCE_LOAD
2372 * If this request contains the FORCE_PREFIX and blocks
2373 * aren't enforced, get rid of it and set the force flag.
2375 if (strstr(req, FORCE_PREFIX))
2377 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
2379 log_error(LOG_LEVEL_FORCE,
2380 "Ignored force prefix in request: \"%s\".", req);
2384 strclean(req, FORCE_PREFIX);
2385 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
2386 csp->flags |= CSP_FLAG_FORCED;
2389 #endif /* def FEATURE_FORCE_LOAD */
2391 err = parse_http_request(req, http);
2393 if (JB_ERR_OK != err)
2395 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
2396 /* XXX: Use correct size */
2397 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
2398 log_error(LOG_LEVEL_ERROR,
2399 "Couldn't parse request line received from %s: %s",
2400 csp->ip_addr_str, jb_err_to_string(err));
2402 free_http_request(http);
2403 return JB_ERR_PARSE;
2406 /* grab the rest of the client's headers */
2410 p = get_header(csp->iob);
2414 /* There are no additional headers to read. */
2421 * We didn't receive a complete header
2422 * line yet, get the rest of it.
2424 if (!data_is_available(csp->cfd, csp->config->socket_timeout))
2426 log_error(LOG_LEVEL_ERROR,
2427 "Stopped grabbing the client headers.");
2428 return JB_ERR_PARSE;
2431 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2434 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
2435 destroy_list(headers);
2436 return JB_ERR_PARSE;
2439 if (add_to_iob(csp, buf, len))
2442 * If there is no memory left for buffering the
2443 * request, there is nothing we can do but hang up
2445 destroy_list(headers);
2446 return JB_ERR_MEMORY;
2452 * We were able to read a complete
2453 * header and can finaly enlist it.
2460 if (http->host == NULL)
2463 * If we still don't know the request destination,
2464 * the request is invalid or the client uses
2465 * Privoxy without its knowledge.
2467 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
2470 * Our attempts to get the request destination
2471 * elsewhere failed or Privoxy is configured
2472 * to only accept proxy requests.
2474 * An error response has already been send
2475 * and we're done here.
2477 return JB_ERR_PARSE;
2482 * Determine the actions for this URL
2484 #ifdef FEATURE_TOGGLE
2485 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
2487 /* Most compatible set of actions (i.e. none) */
2488 init_current_action(csp->action);
2491 #endif /* ndef FEATURE_TOGGLE */
2493 get_url_actions(csp, http);
2497 * Save a copy of the original request for logging
2499 http->ocmd = strdup(http->cmd);
2500 if (http->ocmd == NULL)
2502 log_error(LOG_LEVEL_FATAL,
2503 "Out of memory copying HTTP request line");
2505 enlist(csp->headers, http->cmd);
2507 /* Append the previously read headers */
2508 list_append_list_unique(csp->headers, headers);
2509 destroy_list(headers);
2516 /*********************************************************************
2518 * Function : parse_client_request
2520 * Description : Parses the client's request and decides what to do
2523 * Note that since we're not using select() we could get
2524 * blocked here if a client connected, then didn't say
2528 * 1 : csp = Current client state (buffers, headers, etc...)
2530 * Returns : JB_ERR_OK or JB_ERR_PARSE
2532 *********************************************************************/
2533 static jb_err parse_client_request(struct client_state *csp)
2535 struct http_request *http = csp->http;
2538 err = sed(csp, FILTER_CLIENT_HEADERS);
2539 if (JB_ERR_OK != err)
2541 /* XXX: Should be handled in sed(). */
2542 assert(err == JB_ERR_PARSE);
2543 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers.");
2545 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2547 /* Check request line for rewrites. */
2548 if ((NULL == csp->headers->first->str)
2549 || (strcmp(http->cmd, csp->headers->first->str) &&
2550 (JB_ERR_OK != change_request_destination(csp))))
2553 * A header filter broke the request line - bail out.
2555 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
2556 /* XXX: Use correct size */
2557 log_error(LOG_LEVEL_CLF,
2558 "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
2559 log_error(LOG_LEVEL_ERROR,
2560 "Invalid request line after applying header filters.");
2561 free_http_request(http);
2563 return JB_ERR_PARSE;
2571 /*********************************************************************
2575 * Description : Once a connection to the client has been accepted,
2576 * this function is called (via serve()) to handle the
2577 * main business of the communication. When this
2578 * function returns, the caller must close the client
2581 * FIXME: chat is nearly thousand lines long.
2585 * 1 : csp = Current client state (buffers, headers, etc...)
2587 * Returns : Nothing.
2589 *********************************************************************/
2590 static void chat(struct client_state *csp)
2592 char buf[BUFFER_SIZE];
2599 int ms_iis5_hack = 0;
2600 unsigned long long byte_count = 0;
2601 int forwarded_connect_retries = 0;
2602 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
2603 const struct forward_spec *fwd;
2604 struct http_request *http;
2605 long len = 0; /* for buffer sizes (and negative error codes) */
2607 /* Function that does the content filtering for the current request */
2608 filter_function_ptr content_filter = NULL;
2610 /* Skeleton for HTTP response, if we should intercept the request */
2611 struct http_response *rsp;
2612 struct timeval timeout;
2614 memset(buf, 0, sizeof(buf));
2618 if (receive_client_request(csp) != JB_ERR_OK)
2622 if (parse_client_request(csp) != JB_ERR_OK)
2627 /* decide how to route the HTTP request */
2628 fwd = forward_url(csp, http);
2631 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
2632 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2637 * build the http request to send to the server
2638 * we have to do one of the following:
2640 * create = use the original HTTP request to create a new
2641 * HTTP request that has either the path component
2642 * without the http://domainspec (w/path) or the
2643 * full orininal URL (w/url)
2644 * Note that the path and/or the HTTP version may
2645 * have been altered by now.
2647 * connect = Open a socket to the host:port of the server
2648 * and short-circuit server and client socket.
2650 * pass = Pass the request unchanged if forwarding a CONNECT
2651 * request to a parent proxy. Note that we'll be sending
2652 * the CFAIL message ourselves if connecting to the parent
2653 * fails, but we won't send a CSUCCEED message if it works,
2654 * since that would result in a double message (ours and the
2655 * parent's). After sending the request to the parent, we simply
2658 * here's the matrix:
2661 * +--------+--------+
2663 * 0 | create | connect|
2665 * Forwarding +--------+--------+
2667 * 1 | create | pass |
2669 * +--------+--------+
2673 if (http->ssl && connect_port_is_forbidden(csp))
2675 const char *acceptable_connect_ports =
2676 csp->action->string[ACTION_STRING_LIMIT_CONNECT];
2677 assert(NULL != acceptable_connect_ports);
2678 log_error(LOG_LEVEL_INFO, "Request from %s marked for blocking. "
2679 "limit-connect{%s} doesn't allow CONNECT requests to port %d.",
2680 csp->ip_addr_str, acceptable_connect_ports, csp->http->port);
2681 csp->action->flags |= ACTION_BLOCK;
2687 freez(csp->headers->first->str);
2688 build_request_line(csp, fwd, &csp->headers->first->str);
2692 * We have a request. Check if one of the crunchers wants it.
2694 if (crunch_response_triggered(csp, crunchers_all))
2697 * Yes. The client got the crunch response
2698 * and we are done here after cleaning up.
2700 /* XXX: why list_remove_all()? */
2701 list_remove_all(csp->headers);
2706 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2708 if (fwd->forward_host)
2710 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2711 fwd->forward_host, fwd->forward_port, http->hostport);
2715 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2718 /* here we connect to the server, gateway, or the forwarder */
2720 while ((csp->sfd = forwarded_connect(fwd, http, csp))
2721 && (errno == EINVAL)
2722 && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2724 log_error(LOG_LEVEL_ERROR,
2725 "failed request #%u to connect to %s. Trying again.",
2726 forwarded_connect_retries, http->hostport);
2729 if (csp->sfd == JB_INVALID_SOCKET)
2731 if (fwd->type != SOCKS_NONE)
2734 rsp = error_response(csp, "forwarding-failed", errno);
2736 else if (errno == EINVAL)
2738 rsp = error_response(csp, "no-such-domain", errno);
2742 rsp = error_response(csp, "connect-failed", errno);
2743 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2747 /* Write the answer to the client */
2750 send_crunch_response(csp, rsp);
2756 hdr = list_to_text(csp->headers);
2759 /* FIXME Should handle error properly */
2760 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2762 list_remove_all(csp->headers);
2764 if (fwd->forward_host || (http->ssl == 0))
2767 * Write the client's (modified) header to the server
2768 * (along with anything else that may be in the buffer)
2770 if (write_socket(csp->sfd, hdr, strlen(hdr))
2771 || (flush_socket(csp->sfd, csp->iob) < 0))
2773 log_error(LOG_LEVEL_CONNECT,
2774 "write header to: %s failed: %E", http->hostport);
2776 rsp = error_response(csp, "connect-failed", errno);
2779 send_crunch_response(csp, rsp);
2789 * We're running an SSL tunnel and we're not forwarding,
2790 * so just send the "connect succeeded" message to the
2791 * client, flush the rest, and get out of the way.
2793 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
2801 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2803 /* we're finished with the client's header */
2806 maxfd = (csp->cfd > csp->sfd) ? csp->cfd : csp->sfd;
2808 /* pass data between the client and server
2809 * until one or the other shuts down the connection.
2818 * FD_ZERO here seems to point to an errant macro which crashes.
2819 * So do this by hand for now...
2821 memset(&rfds,0x00,sizeof(fd_set));
2825 FD_SET(csp->cfd, &rfds);
2826 FD_SET(csp->sfd, &rfds);
2828 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2829 if ((csp->flags & CSP_FLAG_CHUNKED)
2830 && !(csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
2831 && ((csp->iob->eod - csp->iob->cur) >= 5)
2832 && !memcmp(csp->iob->eod-5, "0\r\n\r\n", 5))
2834 log_error(LOG_LEVEL_CONNECT,
2835 "Looks like we read the last chunk together with "
2836 "the server headers. We better stop reading.");
2837 byte_count = (unsigned long long)(csp->iob->eod - csp->iob->cur);
2838 csp->expected_content_length = byte_count;
2839 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2841 if (server_body && server_response_is_complete(csp, byte_count))
2843 log_error(LOG_LEVEL_CONNECT,
2844 "Done reading from server. Expected content length: %llu. "
2845 "Actual content length: %llu. Most recently received: %d.",
2846 csp->expected_content_length, byte_count, len);
2849 * XXX: should not jump around,
2850 * chat() is complicated enough already.
2854 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2856 timeout.tv_sec = csp->config->socket_timeout;
2857 timeout.tv_usec = 0;
2858 n = select((int)maxfd+1, &rfds, NULL, NULL, &timeout);
2862 log_error(LOG_LEVEL_ERROR,
2863 "Didn't receive data in time: %s", http->url);
2864 if ((byte_count == 0) && (http->ssl == 0))
2866 write_socket(csp->cfd, CONNECTION_TIMEOUT_RESPONSE,
2867 strlen(CONNECTION_TIMEOUT_RESPONSE));
2869 mark_server_socket_tainted(csp);
2874 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2875 mark_server_socket_tainted(csp);
2880 * This is the body of the browser's request,
2881 * just read and write it.
2883 if (FD_ISSET(csp->cfd, &rfds))
2885 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2889 /* XXX: not sure if this is necessary. */
2890 mark_server_socket_tainted(csp);
2891 break; /* "game over, man" */
2894 if (write_socket(csp->sfd, buf, (size_t)len))
2896 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2897 mark_server_socket_tainted(csp);
2904 * The server wants to talk. It could be the header or the body.
2905 * If `hdr' is null, then it's the header otherwise it's the body.
2906 * FIXME: Does `hdr' really mean `host'? No.
2908 if (FD_ISSET(csp->sfd, &rfds))
2911 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2915 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2917 if (http->ssl && (fwd->forward_host == NULL))
2920 * Just hang up. We already confirmed the client's CONNECT
2921 * request with status code 200 and unencrypted content is
2922 * no longer welcome.
2924 log_error(LOG_LEVEL_ERROR,
2925 "CONNECT already confirmed. Unable to tell the client about the problem.");
2928 else if (byte_count)
2931 * Just hang up. We already transmitted the original headers
2932 * and parts of the original content and therefore missed the
2933 * chance to send an error message (without risking data corruption).
2935 * XXX: we could retry with a fancy range request here.
2937 log_error(LOG_LEVEL_ERROR, "Already forwarded the original headers. "
2938 "Unable to tell the client about the problem.");
2939 mark_server_socket_tainted(csp);
2943 rsp = error_response(csp, "connect-failed", errno);
2946 send_crunch_response(csp, rsp);
2952 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
2953 if (csp->flags & CSP_FLAG_CHUNKED)
2955 if ((len >= 5) && !memcmp(buf+len-5, "0\r\n\r\n", 5))
2957 /* XXX: this is a temporary hack */
2958 log_error(LOG_LEVEL_CONNECT,
2959 "Looks like we reached the end of the last chunk. "
2960 "We better stop reading.");
2961 csp->expected_content_length = byte_count + (unsigned long long)len;
2962 csp->flags |= CSP_FLAG_CONTENT_LENGTH_SET;
2966 #endif /* FEATURE_CONNECTION_KEEP_ALIVE */
2969 * Add a trailing zero to let be able to use string operations.
2970 * XXX: do we still need this with filter_popups gone?
2975 * Normally, this would indicate that we've read
2976 * as much as the server has sent us and we can
2977 * close the client connection. However, Microsoft
2978 * in its wisdom has released IIS/5 with a bug that
2979 * prevents it from sending the trailing \r\n in
2980 * a 302 redirect header (and possibly other headers).
2981 * To work around this if we've haven't parsed
2982 * a full header we'll append a trailing \r\n
2983 * and see if this now generates a valid one.
2985 * This hack shouldn't have any impacts. If we've
2986 * already transmitted the header or if this is a
2987 * SSL connection, then we won't bother with this
2988 * hack. So we only work on partially received
2989 * headers. If we append a \r\n and this still
2990 * doesn't generate a valid header, then we won't
2991 * transmit anything to the client.
2996 if (server_body || http->ssl)
2999 * If we have been buffering up the document,
3000 * now is the time to apply content modification
3001 * and send the result to the client.
3005 p = execute_content_filter(csp, content_filter);
3007 * If the content filter fails, use the original
3008 * buffer and length.
3009 * (see p != NULL ? p : csp->iob->cur below)
3013 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
3016 if (JB_ERR_OK != update_server_headers(csp))
3018 log_error(LOG_LEVEL_FATAL,
3019 "Failed to update server headers. after filtering.");
3022 hdr = list_to_text(csp->headers);
3025 /* FIXME Should handle error properly */
3026 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3029 if (write_socket(csp->cfd, hdr, strlen(hdr))
3030 || write_socket(csp->cfd,
3031 ((p != NULL) ? p : csp->iob->cur), (size_t)csp->content_length))
3033 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
3036 mark_server_socket_tainted(csp);
3044 break; /* "game over, man" */
3048 * This is NOT the body, so
3049 * Let's pretend the server just sent us a blank line.
3051 snprintf(buf, sizeof(buf), "\r\n");
3052 len = (int)strlen(buf);
3055 * Now, let the normal header parsing algorithm below do its
3056 * job. If it fails, we'll exit instead of continuing.
3063 * If this is an SSL connection or we're in the body
3064 * of the server document, just write it to the client,
3065 * unless we need to buffer the body for later content-filtering
3067 if (server_body || http->ssl)
3072 * If there is no memory left for buffering the content, or the buffer limit
3073 * has been reached, switch to non-filtering mode, i.e. make & write the
3074 * header, flush the iob and buf, and get out of the way.
3076 if (add_to_iob(csp, buf, len))
3081 log_error(LOG_LEVEL_INFO,
3082 "Flushing header and buffers. Stepping back from filtering.");
3084 hdr = list_to_text(csp->headers);
3088 * Memory is too tight to even generate the header.
3089 * Send our static "Out-of-memory" page.
3091 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
3092 rsp = cgi_error_memory();
3093 send_crunch_response(csp, rsp);
3094 mark_server_socket_tainted(csp);
3097 hdrlen = strlen(hdr);
3099 if (write_socket(csp->cfd, hdr, hdrlen)
3100 || ((flushed = flush_socket(csp->cfd, csp->iob)) < 0)
3101 || (write_socket(csp->cfd, buf, (size_t)len)))
3103 log_error(LOG_LEVEL_CONNECT,
3104 "Flush header and buffers to client failed: %E");
3106 mark_server_socket_tainted(csp);
3111 * Reset the byte_count to the amount of bytes
3112 * we just flushed. len will be added a few lines below,
3113 * hdrlen doesn't matter for LOG_LEVEL_CLF.
3115 byte_count = (unsigned long long)flushed;
3117 content_filter = NULL;
3123 if (write_socket(csp->cfd, buf, (size_t)len))
3125 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
3126 mark_server_socket_tainted(csp);
3130 byte_count += (unsigned long long)len;
3135 const char *header_start;
3137 * We're still looking for the end of the server's header.
3138 * Buffer up the data we just read. If that fails, there's
3139 * little we can do but send our static out-of-memory page.
3141 if (add_to_iob(csp, buf, len))
3143 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
3144 rsp = cgi_error_memory();
3145 send_crunch_response(csp, rsp);
3146 mark_server_socket_tainted(csp);
3150 header_start = csp->iob->cur;
3152 /* Convert iob into something sed() can digest */
3153 if (JB_ERR_PARSE == get_server_headers(csp))
3158 * Well, we tried our MS IIS/5 hack and it didn't work.
3159 * The header is incomplete and there isn't anything
3160 * we can do about it.
3162 log_error(LOG_LEVEL_INFO,
3163 "MS IIS5 hack didn't produce valid headers.");
3169 * Since we have to wait for more from the server before
3170 * we can parse the headers we just continue here.
3172 long header_offset = csp->iob->cur - header_start;
3173 assert(csp->iob->cur >= header_start);
3174 byte_count += (unsigned long long)(len - header_offset);
3175 log_error(LOG_LEVEL_CONNECT, "Continuing buffering headers. "
3176 "byte_count: %llu. header_offset: %d. len: %d.",
3177 byte_count, header_offset, len);
3182 /* Did we actually get anything? */
3183 if (NULL == csp->headers->first)
3185 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
3186 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3187 write_socket(csp->cfd, NO_SERVER_DATA_RESPONSE, strlen(NO_SERVER_DATA_RESPONSE));
3188 free_http_request(http);
3189 mark_server_socket_tainted(csp);
3193 assert(csp->headers->first->str);
3195 if (strncmpic(csp->headers->first->str, "HTTP", 4) &&
3196 strncmpic(csp->headers->first->str, "ICY", 3))
3199 * It doesn't look like a HTTP (or Shoutcast) response:
3200 * tell the client and log the problem.
3202 if (strlen(csp->headers->first->str) > 30)
3204 csp->headers->first->str[30] = '\0';
3206 log_error(LOG_LEVEL_ERROR,
3207 "Invalid server or forwarder response. Starts with: %s",
3208 csp->headers->first->str);
3209 log_error(LOG_LEVEL_CLF,
3210 "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
3211 write_socket(csp->cfd, INVALID_SERVER_HEADERS_RESPONSE,
3212 strlen(INVALID_SERVER_HEADERS_RESPONSE));
3213 free_http_request(http);
3214 mark_server_socket_tainted(csp);
3219 * We have now received the entire server header,
3220 * filter it and send the result to the client
3222 if (JB_ERR_OK != sed(csp, FILTER_SERVER_HEADERS))
3224 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
3226 hdr = list_to_text(csp->headers);
3229 /* FIXME Should handle error properly */
3230 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
3233 if (crunch_response_triggered(csp, crunchers_light))
3236 * One of the tags created by a server-header
3237 * tagger triggered a crunch. We already
3238 * delivered the crunch response to the client
3239 * and are done here after cleaning up.
3242 mark_server_socket_tainted(csp);
3245 /* Buffer and pcrs filter this if appropriate. */
3247 if (!http->ssl) /* We talk plaintext */
3249 content_filter = get_filter_function(csp);
3252 * Only write if we're not buffering for content modification
3254 if (!content_filter)
3257 * Write the server's (modified) header to
3258 * the client (along with anything else that
3259 * may be in the buffer)
3262 if (write_socket(csp->cfd, hdr, strlen(hdr))
3263 || ((len = flush_socket(csp->cfd, csp->iob)) < 0))
3265 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
3268 * The write failed, so don't bother mentioning it
3269 * to the client... it probably can't hear us anyway.
3272 mark_server_socket_tainted(csp);
3276 byte_count += (unsigned long long)len;
3281 * XXX: the header lenght should probably
3282 * be calculated by get_server_headers().
3284 long header_length = csp->iob->cur - header_start;
3285 assert(csp->iob->cur > header_start);
3286 byte_count += (unsigned long long)(len - header_length);
3289 /* we're finished with the server's header */
3295 * If this was a MS IIS/5 hack then it means the server
3296 * has already closed the connection. Nothing more to read.
3301 log_error(LOG_LEVEL_INFO,
3302 "Closed server connection detected with MS IIS5 hack enabled.");
3308 mark_server_socket_tainted(csp);
3309 return; /* huh? we should never get here */
3312 if (csp->content_length == 0)
3315 * If Privoxy didn't recalculate the Content-Lenght,
3316 * byte_count is still correct.
3318 csp->content_length = byte_count;
3321 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3322 if ((csp->flags & CSP_FLAG_CONTENT_LENGTH_SET)
3323 && (csp->expected_content_length != byte_count))
3325 log_error(LOG_LEVEL_CONNECT,
3326 "Received %llu bytes while expecting %llu.",
3327 byte_count, csp->expected_content_length);
3328 mark_server_socket_tainted(csp);
3332 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %llu",
3333 csp->ip_addr_str, http->ocmd, csp->content_length);
3337 /*********************************************************************
3341 * Description : This is little more than chat. We only "serve" to
3342 * to close any socket that chat may have opened.
3345 * 1 : csp = Current client state (buffers, headers, etc...)
3349 *********************************************************************/
3351 void serve(struct client_state *csp)
3352 #else /* ifndef AMIGA */
3353 static void serve(struct client_state *csp)
3354 #endif /* def AMIGA */
3357 close_socket(csp->cfd);
3359 if (csp->sfd != JB_INVALID_SOCKET)
3361 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
3362 static int monitor_thread_running = 0;
3364 if ((csp->config->feature_flags & RUNTIME_FEATURE_CONNECTION_KEEP_ALIVE)
3365 && (csp->flags & CSP_FLAG_SERVER_CONNECTION_KEEP_ALIVE))
3367 remember_connection(csp->sfd, csp->http, forward_url(csp, csp->http));
3368 privoxy_mutex_lock(&connection_reuse_mutex);
3369 if (!monitor_thread_running)
3371 monitor_thread_running = 1;
3372 privoxy_mutex_unlock(&connection_reuse_mutex);
3373 wait_for_alive_connections();
3374 privoxy_mutex_lock(&connection_reuse_mutex);
3375 monitor_thread_running = 0;
3377 privoxy_mutex_unlock(&connection_reuse_mutex);
3381 forget_connection(csp->sfd);
3382 close_socket(csp->sfd);
3385 close_socket(csp->sfd);
3386 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
3389 csp->flags &= ~CSP_FLAG_ACTIVE;
3395 /*********************************************************************
3397 * Function : server_thread
3399 * Description : We only exist to call `serve' in a threaded environment.
3402 * 1 : data = Current client state (buffers, headers, etc...)
3404 * Returns : Always 0.
3406 *********************************************************************/
3407 static int32 server_thread(void *data)
3409 serve((struct client_state *) data);
3416 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3417 /*********************************************************************
3421 * Description : Print usage info & exit.
3423 * Parameters : Pointer to argv[0] for identifying ourselves
3427 *********************************************************************/
3428 static void usage(const char *myname)
3430 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
3434 #endif /* defined(unix) */
3437 "[--no-daemon] [--pidfile pidfile] [--pre-chroot-nslookup hostname] [--user user[.group]] "
3438 #endif /* defined(unix) */
3439 "[--version] [configfile]\n"
3440 "Aborting\n", myname);
3445 #endif /* #if !defined(_WIN32) || defined(_WIN_CONSOLE) */
3448 #ifdef MUTEX_LOCKS_AVAILABLE
3449 /*********************************************************************
3451 * Function : privoxy_mutex_lock
3453 * Description : Locks a mutex.
3456 * 1 : mutex = The mutex to lock.
3458 * Returns : Void. May exit in case of errors.
3460 *********************************************************************/
3461 void privoxy_mutex_lock(privoxy_mutex_t *mutex)
3463 #ifdef FEATURE_PTHREAD
3464 int err = pthread_mutex_lock(mutex);
3467 if (mutex != &log_mutex)
3469 log_error(LOG_LEVEL_FATAL,
3470 "Mutex locking failed: %s.\n", strerror(err));
3475 EnterCriticalSection(mutex);
3476 #endif /* def FEATURE_PTHREAD */
3480 /*********************************************************************
3482 * Function : privoxy_mutex_unlock
3484 * Description : Unlocks a mutex.
3487 * 1 : mutex = The mutex to unlock.
3489 * Returns : Void. May exit in case of errors.
3491 *********************************************************************/
3492 void privoxy_mutex_unlock(privoxy_mutex_t *mutex)
3494 #ifdef FEATURE_PTHREAD
3495 int err = pthread_mutex_unlock(mutex);
3498 if (mutex != &log_mutex)
3500 log_error(LOG_LEVEL_FATAL,
3501 "Mutex unlocking failed: %s.\n", strerror(err));
3506 LeaveCriticalSection(mutex);
3507 #endif /* def FEATURE_PTHREAD */
3511 /*********************************************************************
3513 * Function : privoxy_mutex_init
3515 * Description : Prepares a mutex.
3518 * 1 : mutex = The mutex to initialize.
3520 * Returns : Void. May exit in case of errors.
3522 *********************************************************************/
3523 static void privoxy_mutex_init(privoxy_mutex_t *mutex)
3525 #ifdef FEATURE_PTHREAD
3526 int err = pthread_mutex_init(mutex, 0);
3529 printf("Fatal error. Mutex initialization failed: %s.\n",
3534 InitializeCriticalSection(mutex);
3535 #endif /* def FEATURE_PTHREAD */
3537 #endif /* def MUTEX_LOCKS_AVAILABLE */
3539 /*********************************************************************
3541 * Function : initialize_mutexes
3543 * Description : Prepares mutexes if mutex support is available.
3547 * Returns : Void, exits in case of errors.
3549 *********************************************************************/
3550 static void initialize_mutexes(void)
3552 #ifdef MUTEX_LOCKS_AVAILABLE
3554 * Prepare global mutex semaphores
3556 privoxy_mutex_init(&log_mutex);
3557 privoxy_mutex_init(&log_init_mutex);
3558 privoxy_mutex_init(&connection_reuse_mutex);
3561 * XXX: The assumptions below are a bit naive
3562 * and can cause locks that aren't necessary.
3564 * For example older FreeBSD versions (< 6.x?)
3565 * have no gethostbyname_r, but gethostbyname is
3568 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
3569 privoxy_mutex_init(&resolver_mutex);
3570 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
3572 * XXX: should we use a single mutex for
3573 * localtime() and gmtime() as well?
3575 #ifndef HAVE_GMTIME_R
3576 privoxy_mutex_init(&gmtime_mutex);
3577 #endif /* ndef HAVE_GMTIME_R */
3579 #ifndef HAVE_LOCALTIME_R
3580 privoxy_mutex_init(&localtime_mutex);
3581 #endif /* ndef HAVE_GMTIME_R */
3584 privoxy_mutex_init(&rand_mutex);
3585 #endif /* ndef HAVE_RANDOM */
3586 #endif /* def MUTEX_LOCKS_AVAILABLE */
3590 /*********************************************************************
3594 * Description : Load the config file and start the listen loop.
3595 * This function is a lot more *sane* with the `load_config'
3596 * and `listen_loop' functions; although it stills does
3597 * a *little* too much for my taste.
3600 * 1 : argc = Number of parameters (including $0).
3601 * 2 : argv = Array of (char *)'s to the parameters.
3603 * Returns : 1 if : can't open config file, unrecognized directive,
3604 * stats requested in multi-thread mode, can't open the
3605 * log file, can't open the jar file, listen port is invalid,
3606 * any load fails, and can't bind port.
3608 * Else main never returns, the process must be signaled
3609 * to terminate execution. Or, on Windows, use the
3610 * "File", "Exit" menu option.
3612 *********************************************************************/
3614 int real_main(int argc, const char *argv[])
3616 int main(int argc, const char *argv[])
3620 unsigned int random_seed;
3622 struct passwd *pw = NULL;
3623 struct group *grp = NULL;
3626 char *pre_chroot_nslookup_to_load_resolver = NULL;
3633 #if !defined(_WIN32)
3640 /* Prepare mutexes if supported and necessary. */
3641 initialize_mutexes();
3643 /* Enable logging until further notice. */
3647 * Parse the command line arguments
3649 * XXX: simply printing usage information in case of
3650 * invalid arguments isn't particularly user friendly.
3652 while (++argc_pos < argc)
3655 /* Check to see if the service must be installed or uninstalled */
3656 if (strncmp(argv[argc_pos], "--install", 9) == 0)
3658 const char *pName = argv[argc_pos] + 9;
3661 exit( (install_service(pName)) ? 0 : 1 );
3663 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
3665 const char *pName = argv[argc_pos] + 11;
3668 exit((uninstall_service(pName)) ? 0 : 1);
3670 else if (strcmp(argv[argc_pos], "--service" ) == 0)
3672 bRunAsService = TRUE;
3673 w32_set_service_cwd();
3674 atexit(w32_service_exit_notify);
3677 #endif /* defined(_WIN32) */
3680 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
3682 if (strcmp(argv[argc_pos], "--help") == 0)
3687 else if(strcmp(argv[argc_pos], "--version") == 0)
3689 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
3695 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
3697 set_debug_level(LOG_LEVEL_FATAL | LOG_LEVEL_ERROR | LOG_LEVEL_INFO);
3701 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
3703 if (++argc_pos == argc) usage(argv[0]);
3704 pidfile = strdup(argv[argc_pos]);
3707 else if (strcmp(argv[argc_pos], "--user" ) == 0)
3709 if (++argc_pos == argc) usage(argv[argc_pos]);
3711 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
3714 if (NULL == (grp = getgrnam(p)))
3716 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
3720 if (NULL == (pw = getpwnam(argv[argc_pos])))
3722 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
3725 if (p != NULL) *--p = '\0';
3728 else if (strcmp(argv[argc_pos], "--pre-chroot-nslookup" ) == 0)
3730 if (++argc_pos == argc) usage(argv[0]);
3731 pre_chroot_nslookup_to_load_resolver = strdup(argv[argc_pos]);
3734 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
3738 #endif /* defined(unix) */
3740 else if (argc_pos + 1 != argc)
3743 * This is neither the last command line
3744 * option, nor was it recognized before,
3745 * therefore it must be invalid.
3751 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3753 configfile = argv[argc_pos];
3756 } /* -END- while (more arguments) */
3758 show_version(Argv[0]);
3761 if ( *configfile != '/' )
3763 char cwd[BUFFER_SIZE];
3765 size_t abs_file_size;
3767 /* make config-filename absolute here */
3768 if (NULL == getcwd(cwd, sizeof(cwd)))
3770 perror("failed to get current working directory");
3775 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3776 basedir = strdup(cwd);
3778 if (NULL == basedir ||
3779 NULL == (abs_file = malloc(abs_file_size)))
3781 perror("malloc failed");
3784 strlcpy(abs_file, basedir, abs_file_size);
3785 strlcat(abs_file, "/", abs_file_size );
3786 strlcat(abs_file, configfile, abs_file_size);
3787 configfile = abs_file;
3789 #endif /* defined unix */
3793 clients->next = NULL;
3795 /* XXX: factor out initialising after the next stable release. */
3798 #elif defined(_WIN32)
3802 random_seed = (unsigned int)time(NULL);
3804 srandom(random_seed);
3807 #endif /* ifdef HAVE_RANDOM */
3810 * Unix signal handling
3812 * Catch the abort, interrupt and terminate signals for a graceful exit
3813 * Catch the hangup signal so the errlog can be reopened.
3814 * Ignore the broken pipe signals (FIXME: Why?)
3816 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3819 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3820 const int ignored_signals[] = { SIGPIPE, 0 };
3822 for (idx = 0; catched_signals[idx] != 0; idx++)
3824 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3825 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3827 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3828 #endif /* ifdef sun */
3830 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3834 for (idx = 0; ignored_signals[idx] != 0; idx++)
3836 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3838 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3843 #else /* ifdef _WIN32 */
3844 # ifdef _WIN_CONSOLE
3846 * We *are* in a windows console app.
3847 * Print a verbose messages about FAQ's and such
3849 printf("%s", win32_blurb);
3850 # endif /* def _WIN_CONSOLE */
3851 #endif /* def _WIN32 */
3854 /* Initialize the CGI subsystem */
3855 cgi_init_error_messages();
3858 * If runnig on unix and without the --nodaemon
3859 * option, become a daemon. I.e. fork, detach
3860 * from tty and get process group leadership
3873 if ( pid < 0 ) /* error */
3878 else if ( pid != 0 ) /* parent */
3883 * must check for errors
3884 * child died due to missing files aso
3887 wpid = waitpid( pid, &status, WNOHANG );
3896 /* Should be more portable, but not as well tested */
3901 #else /* ndef __FreeBSD__ */
3903 #endif /* ndef __FreeBSD__ */
3904 fd = open("/dev/tty", O_RDONLY);
3907 /* no error check here */
3908 ioctl( fd, TIOCNOTTY,0 );
3913 * stderr (fd 2) will be closed later on,
3914 * when the config file has been parsed.
3921 } /* -END- if (!no_daemon) */
3924 * As soon as we have written the PID file, we can switch
3925 * to the user and group ID indicated by the --user option
3931 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3933 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3937 if (setgroups(1, &grp->gr_gid))
3939 log_error(LOG_LEVEL_FATAL, "setgroups() failed: %E");
3942 else if (initgroups(pw->pw_name, pw->pw_gid))
3944 log_error(LOG_LEVEL_FATAL, "initgroups() failed: %E");
3950 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3952 /* Read the time zone file from /etc before doing chroot. */
3954 if (NULL != pre_chroot_nslookup_to_load_resolver
3955 && '\0' != pre_chroot_nslookup_to_load_resolver[0])
3957 /* Initialize resolver library. */
3958 (void) resolve_hostname_to_ip(pre_chroot_nslookup_to_load_resolver);
3960 if (chroot(pw->pw_dir) < 0)
3962 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3966 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3969 if (setuid(pw->pw_uid))
3971 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3975 char putenv_dummy[64];
3977 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3978 if (putenv(putenv_dummy) != 0)
3980 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3983 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3984 if (putenv(putenv_dummy) != 0)
3986 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3992 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3995 #endif /* defined unix */
3998 /* This will be FALSE unless the command line specified --service
4002 /* Yup, so now we must attempt to establish a connection
4003 * with the service dispatcher. This will only work if this
4004 * process was launched by the service control manager to
4005 * actually run as a service. If this isn't the case, i've
4006 * known it take around 30 seconds or so for the call to return.
4009 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
4010 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
4012 /* Service has run, and at this point is now being stopped, so just return */
4017 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
4019 /* An error occurred. Usually it's because --service was wrongly specified
4020 * and we were unable to connect to the Service Control Dispatcher because
4021 * it wasn't expecting us and is therefore not listening.
4023 * For now, just continue below to call the listen_loop function.
4026 #endif /* def _WIN32 */
4036 /*********************************************************************
4038 * Function : bind_port_helper
4040 * Description : Bind the listen port. Handles logging, and aborts
4044 * 1 : config = Privoxy configuration. Specifies port
4047 * Returns : Port that was opened.
4049 *********************************************************************/
4050 static jb_socket bind_port_helper(struct configuration_spec * config)
4055 if (config->haddr == NULL)
4057 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
4062 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
4063 config->hport, config->haddr);
4066 result = bind_port(config->haddr, config->hport, &bfd);
4073 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
4074 "There may be another Privoxy or some other "
4075 "proxy running on port %d",
4076 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
4077 config->hport, config->hport);
4080 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
4081 "The hostname is not resolvable",
4082 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
4085 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
4086 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
4089 /* shouldn't get here */
4090 return JB_INVALID_SOCKET;
4093 config->need_bind = 0;
4100 /* Without this simple workaround we get this compiler warning from _beginthread
4101 * warning C4028: formal parameter 1 different from declaration
4103 void w32_service_listen_loop(void *p)
4107 #endif /* def _WIN32 */
4110 /*********************************************************************
4112 * Function : listen_loop
4114 * Description : bind the listen port and enter a "FOREVER" listening loop.
4120 *********************************************************************/
4121 static void listen_loop(void)
4123 struct client_state *csp = NULL;
4125 struct configuration_spec * config;
4127 config = load_config();
4129 #ifdef FEATURE_CONNECTION_KEEP_ALIVE
4131 * XXX: Should be relocated once it no
4132 * longer needs to emit log messages.
4134 initialize_reusable_connections();
4135 #endif /* def FEATURE_CONNECTION_KEEP_ALIVE */
4137 bfd = bind_port_helper(config);
4139 #ifdef FEATURE_GRACEFUL_TERMINATION
4140 while (!g_terminate)
4145 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
4146 while (waitpid(-1, NULL, WNOHANG) > 0)
4148 /* zombie children */
4150 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
4153 * Free data that was used by died threads
4159 * Re-open the errlog after HUP signal
4161 if (received_hup_signal)
4163 if (NULL != config->logfile)
4165 init_error_log(Argv[0], config->logfile);
4167 received_hup_signal = 0;
4171 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
4173 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
4177 csp->flags |= CSP_FLAG_ACTIVE;
4178 csp->sfd = JB_INVALID_SOCKET;
4180 csp->config = config = load_config();
4182 if ( config->need_bind )
4185 * Since we were listening to the "old port", we will not see
4186 * a "listen" param change until the next IJB request. So, at
4187 * least 1 more request must be made for us to find the new
4188 * setting. I am simply closing the old socket and binding the
4191 * Which-ever is correct, we will serve 1 more page via the
4192 * old settings. This should probably be a "show-proxy-args"
4193 * request. This should not be a so common of an operation
4194 * that this will hurt people's feelings.
4199 bfd = bind_port_helper(config);
4202 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
4204 if (!accept_connection(csp, bfd))
4206 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
4219 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
4222 #ifdef FEATURE_TOGGLE
4223 if (global_toggle_state)
4224 #endif /* def FEATURE_TOGGLE */
4226 csp->flags |= CSP_FLAG_TOGGLED_ON;
4229 if (run_loader(csp))
4231 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
4232 /* Never get here - LOG_LEVEL_FATAL causes program exit */
4236 if (block_acl(NULL,csp))
4238 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
4239 close_socket(csp->cfd);
4243 #endif /* def FEATURE_ACL */
4245 /* add it to the list of clients */
4246 csp->next = clients->next;
4247 clients->next = csp;
4249 if (config->multi_threaded)
4253 /* this is a switch () statment in the C preprocessor - ugh */
4254 #undef SELECTED_ONE_OPTION
4256 /* Use Pthreads in preference to native code */
4257 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
4258 #define SELECTED_ONE_OPTION
4260 pthread_t the_thread;
4261 pthread_attr_t attrs;
4263 pthread_attr_init(&attrs);
4264 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
4265 errno = pthread_create(&the_thread, &attrs,
4266 (void * (*)(void *))serve, csp);
4267 child_id = errno ? -1 : 0;
4268 pthread_attr_destroy(&attrs);
4272 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
4273 #define SELECTED_ONE_OPTION
4274 child_id = _beginthread(
4275 (void (*)(void *))serve,
4280 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
4281 #define SELECTED_ONE_OPTION
4282 child_id = _beginthread(
4283 (void(* _Optlink)(void*))serve,
4289 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
4290 #define SELECTED_ONE_OPTION
4292 thread_id tid = spawn_thread
4293 (server_thread, "server", B_NORMAL_PRIORITY, csp);
4295 if ((tid >= 0) && (resume_thread(tid) == B_OK))
4297 child_id = (int) tid;
4306 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
4307 #define SELECTED_ONE_OPTION
4308 csp->cfd = ReleaseSocket(csp->cfd, -1);
4311 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4312 NP_Output, Output(),
4313 NP_CloseOutput, FALSE,
4314 NP_Name, (ULONG)"privoxy child",
4318 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
4319 NP_Output, Output(),
4320 NP_CloseOutput, FALSE,
4321 NP_Name, (ULONG)"privoxy child",
4322 NP_StackSize, 200*1024,
4328 ((struct Task *)child_id)->tc_UserData = csp;
4329 Signal((struct Task *)child_id, SIGF_SINGLE);
4334 #if !defined(SELECTED_ONE_OPTION)
4337 /* This block is only needed when using fork().
4338 * When using threads, the server thread was
4339 * created and run by the call to _beginthread().
4341 if (child_id == 0) /* child */
4344 #ifdef FEATURE_TOGGLE
4345 int inherited_toggle_state = global_toggle_state;
4346 #endif /* def FEATURE_TOGGLE */
4351 * If we've been toggled or we've blocked the request, tell Mom
4354 #ifdef FEATURE_TOGGLE
4355 if (inherited_toggle_state != global_toggle_state)
4357 rc |= RC_FLAG_TOGGLED;
4359 #endif /* def FEATURE_TOGGLE */
4361 #ifdef FEATURE_STATISTICS
4362 if (csp->flags & CSP_FLAG_REJECTED)
4364 rc |= RC_FLAG_BLOCKED;
4366 #endif /* ndef FEATURE_STATISTICS */
4370 else if (child_id > 0) /* parent */
4372 /* in a fork()'d environment, the parent's
4373 * copy of the client socket and the CSP
4377 #if !defined(_WIN32) && !defined(__CYGWIN__)
4379 wait( &child_status );
4382 * Evaluate child's return code: If the child has
4383 * - been toggled, toggle ourselves
4384 * - blocked its request, bump up the stats counter
4387 #ifdef FEATURE_TOGGLE
4388 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
4390 global_toggle_state = !global_toggle_state;
4392 #endif /* def FEATURE_TOGGLE */
4394 #ifdef FEATURE_STATISTICS
4396 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
4400 #endif /* def FEATURE_STATISTICS */
4402 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
4403 close_socket(csp->cfd);
4404 csp->flags &= ~CSP_FLAG_ACTIVE;
4408 #undef SELECTED_ONE_OPTION
4409 /* end of cpp switch () */
4411 if (child_id < 0) /* failed */
4413 char buf[BUFFER_SIZE];
4415 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
4417 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
4419 write_socket(csp->cfd, buf, strlen(buf));
4420 close_socket(csp->cfd);
4421 csp->flags &= ~CSP_FLAG_ACTIVE;
4432 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
4434 /* Clean up. Aim: free all memory (no leaks) */
4435 #ifdef FEATURE_GRACEFUL_TERMINATION
4437 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
4439 unload_current_config_file();
4440 unload_current_actions_file();
4441 unload_current_re_filterfile();
4442 #ifdef FEATURE_TRUST
4443 unload_current_trust_file();
4446 if (config->multi_threaded)
4453 } while ((clients->next != NULL) && (--i > 0));
4457 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
4468 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
4469 /* Cleanup - remove taskbar icon etc. */
4474 #endif /* FEATURE_GRACEFUL_TERMINATION */