1 const char jcc_rcs[] = "$Id: jcc.c,v 1.138 2007/06/03 18:45:18 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) 2001-2007 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 1.138 2007/06/03 18:45:18 fabiankeil
37 * Temporary workaround for BR#1730105.
39 * Revision 1.137 2007/06/01 18:16:36 fabiankeil
40 * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
41 * deadlocks and crashes on OpenBSD and possibly other OS with neither
42 * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
43 * Thanks to Ralf Horstmann for report and solution.
45 * Revision 1.136 2007/06/01 16:41:11 fabiankeil
46 * Add forward-override{} to change the forwarding settings through
47 * action sections. This is mainly interesting to forward different
48 * clients differently (for example based on User-Agent or request
51 * Revision 1.135 2007/05/24 17:03:50 fabiankeil
52 * - Let usage() mention the --chroot parameter.
53 * - Use read_socket() consistently and always leave
54 * the last buffer byte alone, even in cases where
55 * null termination (currently) doesn't matter.
57 * Revision 1.134 2007/05/16 14:59:46 fabiankeil
58 * - Fix config file loading on Unix if no config file is specified.
59 * Since r1.97 Privoxy would always interpret the last argument as
60 * config file, even if it's a valid command line option.
61 * - Abort in case of unrecognized command line options. Closes #1719696.
62 * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
63 * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
65 * Revision 1.133 2007/05/04 11:23:19 fabiankeil
66 * - Don't rerun crunchers that only depend on the request URL.
67 * - Don't count redirects and CGI requests as "blocked requests".
69 * Revision 1.132 2007/04/25 15:15:17 fabiankeil
70 * Support crunching based on tags created by server-header taggers.
72 * Revision 1.131 2007/04/22 13:24:50 fabiankeil
73 * Make HTTP snippets static (again). Add a Content-Type for those
74 * with content so the browser doesn't guess it based on the URL.
76 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
77 * Move crunching and request line rebuilding out of chat().
79 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
80 * Introduce tags as alternative way to specify which
81 * actions apply to a request. At the moment tags can be
82 * created based on client and server headers.
84 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
85 * Don't CLF-log CONNECT requests twice.
87 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
88 * Log the source address for ACL-related connection drops.
90 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
91 * New config option: enforce-blocks.
93 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
94 * - Move null byte check into separate function.
95 * - Don't confuse the client with error pages
96 * if a CONNECT request was already confirmed.
98 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
99 * Speed up NULL byte escaping and only log the complete
100 * NULL byte requests with header debugging enabled.
102 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
103 * Answer requests that contain NULL bytes with
104 * a custom response instead of waiting for more
105 * data until the client eventually hangs up.
107 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
108 * - Move delivery and logging of crunched responses
109 * from chat() into send_crunch_response().
110 * - Display the reason for generating http_responses.
111 * - Log the content length for LOG_LEVEL_CLF correctly
112 * (still incorrect for some fixed responses).
113 * - Reword an incorrect comment about
114 * treat-forbidden-connects-like-blocks violating
116 * - Add some log messages.
118 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
119 * Move mutex initialization into separate
120 * function and exit in case of errors.
122 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
123 * - Start to reduce chat()'s line count and move
124 * parts of it into separate functions.
125 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
127 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
128 * - Add Proxy-Agent header to HTTP snippets that are
129 * supposed to reach HTTP clients only.
130 * - Made a few CONNECT log messages more descriptive.
131 * - Catch completely empty server responses (as seen
132 * with Tor's fake ".noconnect" top level domain).
133 * - Use shiny new "forwarding-failed" template for socks errors.
135 * Revision 1.118 2007/01/07 07:43:43 joergs
136 * AmigaOS4 support added.
138 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
139 * Added config option accept-intercepted-requests
140 * and disabled it by default.
142 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
143 * Reverted parts of my last commit
144 * to keep error handling working.
146 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
147 * Fixed gcc43 conversion warnings.
149 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
150 * Fix -pedantic ISO C warning about converting
151 * from function pointer to object pointer.
153 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
154 * Silence compiler warning I introduced with my last commit.
156 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
157 * Mutex protect rand() if POSIX threading
158 * is used, warn the user if that's not possible
159 * and stop using it on _WIN32 where it could
162 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
163 * Don't prevent core dumps by catching SIGABRT.
164 * It's rude and makes debugging unreasonable painful.
166 * Revision 1.110 2006/12/13 14:52:53 etresoft
167 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
169 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
170 * Privoxy is now able to run as intercepting
171 * proxy in combination with any packet filter
172 * that does the port redirection. The destination
173 * is extracted from the "Host:" header which
174 * should be available for nearly all requests.
176 * Moved HTTP snipplets into jcc.c.
177 * Added error message for gopher proxy requests.
179 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
180 * Only unlink the pidfile if it's actually used.
182 * Change order of interception checks to make
183 * it possible to block or redirect requests for
186 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
187 * Make pthread mutex locking more generic. Instead of
188 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
189 * and use mutex locking unless there is an _r function
190 * available. Better safe than sorry.
192 * Fixes "./configure --disable-pthread" and should result
193 * in less threading-related problems on pthread-using platforms,
194 * but it still doesn't fix BR#1122404.
196 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
197 * Move pthread.h inclusion from jcc.c to jcc.h.
198 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
200 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
201 * Don't exit after receiving the second SIGHUP on Solaris.
203 * Fixes BR 1052235, but the same problem may exist on other
204 * systems. Once 3.0.6 is out we should use sigset()
205 * where available and see if it breaks anything.
207 * Revision 1.104 2006/09/23 13:26:38 roro
208 * Replace TABs by spaces in source code.
210 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
211 * Fix +redirect{}. Didn't work with -fast-redirects.
213 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
214 * Respond with 400 and a short text message
215 * if the client tries to use Privoxy as FTP proxy.
217 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
218 * Make number of retries in case of forwarded-connect problems
219 * a config file option (forwarded-connect-retries) and use 0 as
222 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
223 * Set random(3) seed.
225 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
226 * Follow the OpenBSD port's lead and protect the resolve
227 * functions on OpenBSD as well.
229 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
230 * --user fix. Only use the user as group if no group is specified.
231 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
233 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
234 * Windows service (re-)integration
238 * --install[:service_name]
239 * --uninstall[:service_name]
242 * They work as follows:
243 * --install will create a service for you and then terminate.
244 * By default the service name will be "privoxy" (without the quotes).
245 * However you can run multiple services if you wish, just by adding
246 * a colon and then a name (no spaces).
248 * --uninstall follows the exact same rules a --install.
250 * --service is used when the program is executed by the service
251 * control manager, and in normal circumstances would never be
252 * used as a command line argument.
254 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
255 * Windows service integration
257 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
258 * Incorporate Fabian Keil's patch work:
259 http://www.fabiankeil.de/sourcecode/privoxy/
261 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
262 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
263 * with what was really the latest development (the v_3_0_branch branch)
265 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
266 * Thanks to Jindrich Makovicka for a race condition fix for the log
267 * file. The race condition remains for non-pthread implementations.
268 * Reference patch #1175720.
270 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
271 * Add the ability to check jpeg images for invalid
272 * lengths of comment blocks. Defensive strategy
273 * against the exploit:
274 * Microsoft Security Bulletin MS04-028
275 * Buffer Overrun in JPEG Processing (GDI+) Could
276 * Allow Code Execution (833987)
277 * Enabled with +inspect-jpegs in actions files.
279 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
280 * - Fixed usage info for non-unix platforms
281 * - Fixed small cmdline parsing bug
283 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
284 * Diagnostics: Now preserve the returncode of pthread_create
285 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
287 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
288 * No longer ignore SIGCHLD. Fixes bug #769381
290 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
291 * Close jarfile on graceful exit, remove stray line
293 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
294 * Cosmetics: Killed a warning, a typo and an allocation left at exit
296 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
297 * No longer rely on non-POSIX.1 extensions of getcwd().
300 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
301 * Replaced setenv() by posix-compliant putenv()
302 * Thanks to Neil McCalden (nmcc AT users.sf.net).
304 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
305 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
307 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
308 * Clean-up and extension of improvements for forked mode:
309 * - Child's return code now consists of flags RC_FLAG_*
310 * - Reporting toggle to parent now properly #ifdef'ed
311 * - Children now report blocking to parent. This enables
312 * statistics in forked mode
314 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
315 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
316 * Children now report having been toggled through _exit(17), parents
317 * watch for that code and toggle themselves if found.
319 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
320 * Wrapping all *_r functions (the non-_r versions of them) with
321 * mutex semaphores for OSX. Hopefully this will take care of all
322 * of those pesky crash reports.
324 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
325 * Fixed two mostly harmless mem leaks
327 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
328 * Fix: Head of global clients list now initialized to NULL
330 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
331 * Added basic support for OPTIONS and TRACE HTTP methods:
332 * - New interceptor direct_response() added in chat().
333 * - sed() moved to earlier in the process, so that the
334 * Host: header is evaluated before actions and forwarding
337 * Revision 1.92 2002/05/08 16:00:46 oes
338 * Chat's buffer handling:
339 * - Fixed bug with unchecked out-of-mem conditions
340 * while reading client request & server headers
341 * - No longer predict if the buffer limit will be exceeded
342 * in the next read -- check add_to_iob's new
343 * return code. If buffer couldn't be extended
344 * (policy or out-of-mem) while
345 * - reading from client: abort
346 * - reading server headers: send error page
347 * - buffering server body for filter: flush,
348 * and if that fails: send error page
350 * Revision 1.91 2002/04/08 20:35:58 swa
353 * Revision 1.90 2002/04/02 14:57:28 oes
354 * Made sending wafers independent of FEATURE_COOKIE_JAR
356 * Revision 1.89 2002/03/31 17:18:59 jongfoster
357 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
359 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
360 * More compiler warning message maintenance
362 * Revision 1.87 2002/03/26 22:29:54 swa
363 * we have a new homepage!
365 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
366 * Workaround for closing the jarfile before load_config() comes around again
368 * Revision 1.85 2002/03/24 15:23:33 jongfoster
371 * Revision 1.84 2002/03/24 13:25:43 swa
372 * name change related issues
374 * Revision 1.83 2002/03/16 23:54:06 jongfoster
375 * Adding graceful termination feature, to help look for memory leaks.
376 * If you enable this (which, by design, has to be done by hand
377 * editing config.h) and then go to http://i.j.b/die, then the program
378 * will exit cleanly after the *next* request. It should free all the
379 * memory that was used.
381 * Revision 1.82 2002/03/13 00:27:05 jongfoster
384 * Revision 1.81 2002/03/12 01:42:50 oes
385 * Introduced modular filters
387 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
388 * OS/2 port maintenance:
389 * - Fixed EMX build - it had decayed a little
390 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
391 * substituted a memset for now.
393 * Revision 1.79 2002/03/09 20:03:52 jongfoster
394 * - Making various functions return int rather than size_t.
395 * (Undoing a recent change). Since size_t is unsigned on
396 * Windows, functions like read_socket that return -1 on
397 * error cannot return a size_t.
399 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
400 * crashes, and also frequently caused JB to jump to 100%
401 * CPU and stay there. (Because it thought it had just
402 * read ((unsigned)-1) == 4Gb of data...)
404 * - The signature of write_socket has changed, it now simply
405 * returns success=0/failure=nonzero.
407 * - Trying to get rid of a few warnings --with-debug on
408 * Windows, I've introduced a new type "jb_socket". This is
409 * used for the socket file descriptors. On Windows, this
410 * is SOCKET (a typedef for unsigned). Everywhere else, it's
411 * an int. The error value can't be -1 any more, so it's
412 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
413 * Windows it maps to the #define INVALID_SOCKET.)
415 * - The signature of bind_port has changed.
417 * Revision 1.78 2002/03/08 21:35:04 oes
418 * Added optional group supplement to --user option. Will now use default group of user if no group given
420 * Revision 1.77 2002/03/07 03:52:06 oes
421 * - Fixed compiler warnings etc
422 * - Improved handling of failed DNS lookups
424 * Revision 1.76 2002/03/06 22:54:35 jongfoster
425 * Automated function-comment nitpicking.
427 * Revision 1.75 2002/03/06 10:02:19 oes
428 * Fixed stupid bug when --user was not given
430 * Revision 1.74 2002/03/06 00:49:31 jongfoster
431 * Fixing warning on Windows
432 * Making #ifdefs that refer to the same variable consistently
433 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
435 * Revision 1.73 2002/03/05 23:57:30 hal9
436 * Stray character 's' on line 1618 was breaking build.
438 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
439 * - Re-enable OS/2 building after new parms were added
440 * - Fix false out of memory report when resolving CGI templates when no IP
441 * address is available of failed attempt (a la no such domain)
443 * Revision 1.71 2002/03/05 18:13:56 oes
444 * Added --user option
446 * Revision 1.70 2002/03/05 04:52:42 oes
447 * Deleted non-errlog debugging code
449 * Revision 1.69 2002/03/04 23:50:00 jongfoster
450 * Splitting off bind_port() call into bind_port_helper(), with
453 * Revision 1.68 2002/03/04 20:17:32 oes
456 * Revision 1.67 2002/03/04 18:18:57 oes
457 * - Removed _DEBUG mode
458 * - Cleand up cmdline parsing
459 * - Introduced --no-daemon, --pidfile options
460 * - Cleaned up signal handling:
461 * - Terminate cleanly on INT, TERM and ABRT
462 * - Schedule logfile for re-opening on HUP
463 * - Ignore CHLD and PIPE
464 * - Leave the rest with their default handlers
465 * - Uniform handler registration
466 * - Added usage() function
467 * - Played styleguide police
469 * Revision 1.66 2002/03/03 15:06:55 oes
470 * Re-enabled automatic config reloading
472 * Revision 1.65 2002/03/03 14:49:11 oes
473 * Fixed CLF logging: Now uses client's original HTTP request
475 * Revision 1.64 2002/03/03 09:18:03 joergs
476 * Made jumbjuster work on AmigaOS again.
478 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
479 * Clean up a little CRLF unpleasantness that suddenly appeared
481 * Revision 1.62 2002/02/20 23:17:23 jongfoster
482 * Detecting some out-of memory conditions and exiting with a log message.
484 * Revision 1.61 2002/01/17 21:01:52 jongfoster
485 * Moving all our URL and URL pattern parsing code to urlmatch.c.
487 * Revision 1.60 2001/12/30 14:07:32 steudten
488 * - Add signal handling (unix)
489 * - Add SIGHUP handler (unix)
490 * - Add creation of pidfile (unix)
491 * - Add action 'top' in rc file (RH)
492 * - Add entry 'SIGNALS' to manpage
493 * - Add exit message to logfile (unix)
495 * Revision 1.59 2001/12/13 14:07:18 oes
496 * Fixed Bug: 503 error page now sent OK
498 * Revision 1.58 2001/11/30 23:37:24 jongfoster
499 * Renaming the Win32 config file to config.txt - this is almost the
500 * same as the corresponding UNIX name "config"
502 * Revision 1.57 2001/11/16 00:47:43 jongfoster
503 * Changing the tty-disconnection code to use setsid().
505 * Revision 1.56 2001/11/13 20:20:54 jongfoster
506 * Tabs->spaces, fixing a bug with missing {} around an if()
508 * Revision 1.55 2001/11/13 20:14:53 jongfoster
509 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
511 * Revision 1.54 2001/11/07 00:03:14 steudten
512 * Give reliable return value if an error
513 * occurs not just 0 with new daemon mode.
515 * Revision 1.53 2001/11/05 21:41:43 steudten
516 * Add changes to be a real daemon just for unix os.
517 * (change cwd to /, detach from controlling tty, set
518 * process group and session leader to the own process.
520 * Add some fatal-error log message for failed malloc().
521 * Add '-d' if compiled with 'configure --with-debug' to
522 * enable debug output.
524 * Revision 1.52 2001/10/26 20:11:20 jongfoster
525 * Fixing type mismatch
527 * Revision 1.51 2001/10/26 17:38:28 oes
530 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
531 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
532 * threads to call select() simultaneously. So, it's time to do a real, live,
533 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
534 * (native). Both versions will work, but using __OS2__ offers multi-threading.
536 * Revision 1.49 2001/10/23 21:41:35 jongfoster
537 * Added call to initialize the (statically-allocated of course)
538 * "out of memory" CGI response.
540 * Revision 1.48 2001/10/10 19:56:46 jongfoster
541 * Moving some code that wasn't cookie-related out of an #ifdef
544 * Revision 1.47 2001/10/10 16:44:36 oes
545 * Added CONNECT destination port limitation check
547 * Revision 1.46 2001/10/08 15:17:41 oes
548 * Re-enabled SSL forwarding
550 * Revision 1.45 2001/10/07 15:42:11 oes
551 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
553 * Moved downgrading of the HTTP version from parse_http_request to
554 * chat(), since we can't decide if it is necessary before we have
555 * determined the actions for the URL. The HTTP command is now
556 * *always* re-built so the repairs need no longer be special-cased.
558 * filter_popups now gets a csp pointer so it can raise the new
559 * CSP_FLAG_MODIFIED flag.
563 * Added configurable size limit for the IOB. If the IOB grows so
564 * large that the next read would exceed the limit, the header
565 * is generated, and the header & unfiltered buffer are flushed
566 * to the client. Chat then continues in non-buffering,
567 * non-filtering body mode.
569 * Revision 1.44 2001/10/02 18:13:57 oes
572 * Revision 1.43 2001/10/02 15:32:13 oes
573 * Moved generation of hdr
575 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
576 * Cleaning up 2 compiler warnings on OS/2.
578 * Revision 1.41 2001/09/16 17:05:14 jongfoster
579 * Removing unused #include showarg.h
581 * Revision 1.40 2001/09/16 15:41:45 jongfoster
582 * Fixing signed/unsigned comparison warning.
584 * Revision 1.39 2001/09/16 13:21:27 jongfoster
585 * Changes to use new list functions.
587 * Revision 1.38 2001/09/16 13:01:46 jongfoster
588 * Removing redundant function call that zeroed zalloc()'d memory.
590 * Revision 1.37 2001/09/10 11:12:24 oes
591 * Deleted unused variable
593 * Revision 1.36 2001/09/10 10:56:15 oes
594 * Silenced compiler warnings
596 * Revision 1.35 2001/07/31 14:44:22 oes
597 * Deleted unused size parameter from filter_popups()
599 * Revision 1.34 2001/07/30 22:08:36 jongfoster
600 * Tidying up #defines:
601 * - All feature #defines are now of the form FEATURE_xxx
602 * - Permanently turned off WIN_GUI_EDIT
603 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
605 * Revision 1.33 2001/07/29 19:32:00 jongfoster
606 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
608 * Revision 1.32 2001/07/29 18:47:05 jongfoster
609 * Adding missing #include "loadcfg.h"
611 * Revision 1.31 2001/07/29 12:17:48 oes
612 * Applied pthread fix by Paul Lieverse
614 * Revision 1.30 2001/07/25 22:57:13 jongfoster
615 * __BEOS__ no longer overrides FEATURE_PTHREAD.
616 * This is because FEATURE_PTHREAD will soon be widely used, so I
617 * want to keep it simple.
619 * Revision 1.29 2001/07/24 12:47:06 oes
620 * Applied BeOS support update by Eugenia
622 * Revision 1.28 2001/07/23 13:26:12 oes
623 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
625 * Revision 1.27 2001/07/19 19:09:47 haroon
626 * - Added code to take care of the situation where while processing the first
627 * server response (which includes the server header), after finding the end
628 * of the headers we were not looking past the end of the headers for
629 * content modification. I enabled it for filter_popups.
630 * Someone else should look to see if other similar operations should be
631 * done to the discarded portion of the buffer.
633 * Note 2001/07/20: No, the other content modification mechanisms will process
634 * the whole iob later anyway. --oes
636 * Revision 1.26 2001/07/18 12:31:36 oes
639 * Revision 1.25 2001/07/15 19:43:49 jongfoster
640 * Supports POSIX threads.
641 * Also removed some unused #includes.
643 * Revision 1.24 2001/07/13 14:00:40 oes
644 * - Generic content modification scheme:
645 * Each feature has its own applicability flag that is set
646 * from csp->action->flags.
647 * Replaced the "filtering" int flag , by a function pointer
648 * "content_filter" to the function that will do the content
649 * modification. If it is != NULL, the document will be buffered
650 * and processed through *content_filter, which must set
651 * csp->content_length and return a modified copy of the body
652 * or return NULL (on failiure).
653 * - Changed csp->is_text to the more generic bitmap csp->content_type
654 * which can currently take the valued CT_TEXT or CT_GIF
656 * - Removed all #ifdef PCRS
658 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
659 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
660 * the `block_acl' call. This prevents a compilation error when the user
661 * does not wish to use the "ACL" feature.
663 * Revision 1.22 2001/06/29 21:45:41 oes
664 * Indentation, CRLF->LF, Tab-> Space
666 * Revision 1.21 2001/06/29 13:29:36 oes
667 * - Cleaned up, improved comments
668 * - Unified all possible interceptors (CGI,
669 * block, trust, fast_redirect) in one
670 * place, with one (CGI) answer generation
671 * mechansim. Much clearer now.
672 * - Removed the GIF image generation, which
673 * is now done in filters.c:block_url()
674 * - Made error conditions like domain lookup
675 * failiure or (various) problems while talking
676 * to the server use cgi.c:error_response()
677 * instead of generating HTML/HTTP in chat() (yuck!)
678 * - Removed logentry from cancelled commit
680 * Revision 1.20 2001/06/09 10:55:28 jongfoster
681 * Changing BUFSIZ ==> BUFFER_SIZE
683 * Revision 1.19 2001/06/07 23:12:52 jongfoster
684 * Replacing function pointer in struct gateway with a directly
685 * called function forwarded_connect().
686 * Replacing struct gateway with struct forward_spec
688 * Revision 1.18 2001/06/03 19:12:16 oes
689 * introduced new cgi handling
691 * Revision 1.17 2001/06/01 20:07:23 jongfoster
692 * Now uses action +image-blocker{} rather than config->tinygif
694 * Revision 1.16 2001/06/01 18:49:17 jongfoster
695 * Replaced "list_share" with "list" - the tiny memory gain was not
696 * worth the extra complexity.
698 * Revision 1.15 2001/05/31 21:24:47 jongfoster
699 * Changed "permission" to "action" throughout.
700 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
701 * Moved vanilla wafer check into chat(), since we must now
702 * decide whether or not to add it based on the URL.
704 * Revision 1.14 2001/05/29 20:14:01 joergs
705 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
708 * Revision 1.13 2001/05/29 09:50:24 jongfoster
709 * Unified blocklist/imagelist/permissionslist.
710 * File format is still under discussion, but the internal changes
713 * Also modified interceptor behaviour:
714 * - We now intercept all URLs beginning with one of the following
715 * prefixes (and *only* these prefixes):
717 * * http://ijbswa.sf.net/config/
718 * * http://ijbswa.sourceforge.net/config/
719 * - New interceptors "home page" - go to http://i.j.b/ to see it.
720 * - Internal changes so that intercepted and fast redirect pages
721 * are not replaced with an image.
722 * - Interceptors now have the option to send a binary page direct
723 * to the client. (i.e. ijb-send-banner uses this)
724 * - Implemented show-url-info interceptor. (Which is why I needed
725 * the above interceptors changes - a typical URL is
726 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
727 * The previous mechanism would not have intercepted that, and
728 * if it had been intercepted then it then it would have replaced
731 * Revision 1.12 2001/05/27 22:17:04 oes
733 * - re_process_buffer no longer writes the modified buffer
734 * to the client, which was very ugly. It now returns the
735 * buffer, which it is then written by chat.
737 * - content_length now adjusts the Content-Length: header
738 * for modified documents rather than crunch()ing it.
739 * (Length info in csp->content_length, which is 0 for
740 * unmodified documents)
742 * - For this to work, sed() is called twice when filtering.
744 * Revision 1.11 2001/05/26 17:27:53 jongfoster
745 * Added support for CLF and fixed LOG_LEVEL_LOG.
746 * Also did CRLF->LF fix of my previous patch.
748 * Revision 1.10 2001/05/26 15:26:15 jongfoster
749 * ACL feature now provides more security by immediately dropping
750 * connections from untrusted hosts.
752 * Revision 1.9 2001/05/26 00:28:36 jongfoster
753 * Automatic reloading of config file.
754 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
755 * Most of the global variables have been moved to a new
756 * struct configuration_spec, accessed through csp->config->globalname
757 * Most of the globals remaining are used by the Win32 GUI.
759 * Revision 1.8 2001/05/25 22:43:18 jongfoster
760 * Fixing minor memory leak and buffer overflow.
762 * Revision 1.7 2001/05/25 22:34:30 jongfoster
765 * Revision 1.6 2001/05/23 00:13:58 joergs
766 * AmigaOS support fixed.
768 * Revision 1.5 2001/05/22 18:46:04 oes
770 * - Enabled filtering banners by size rather than URL
771 * by adding patterns that replace all standard banner
772 * sizes with the "Junkbuster" gif to the re_filterfile
774 * - Enabled filtering WebBugs by providing a pattern
775 * which kills all 1x1 images
777 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
778 * which is selected by the (nonstandard and therefore
779 * capital) letter 'U' in the option string.
780 * It causes the quantifiers to be ungreedy by default.
781 * Appending a ? turns back to greedy (!).
783 * - Added a new interceptor ijb-send-banner, which
784 * sends back the "Junkbuster" gif. Without imagelist or
785 * MSIE detection support, or if tinygif = 1, or the
786 * URL isn't recognized as an imageurl, a lame HTML
787 * explanation is sent instead.
789 * - Added new feature, which permits blocking remote
790 * script redirects and firing back a local redirect
792 * The feature is conditionally compiled, i.e. it
793 * can be disabled with --disable-fast-redirects,
794 * plus it must be activated by a "fast-redirects"
795 * line in the config file, has its own log level
796 * and of course wants to be displayed by show-proxy-args
797 * Note: Boy, all the #ifdefs in 1001 locations and
798 * all the fumbling with configure.in and acconfig.h
799 * were *way* more work than the feature itself :-(
801 * - Because a generic redirect template was needed for
802 * this, tinygif = 3 now uses the same.
804 * - Moved GIFs, and other static HTTP response templates
809 * - Removed some >400 CRs again (Jon, you really worked
812 * Revision 1.4 2001/05/21 19:34:01 jongfoster
813 * Made failure to bind() a fatal error.
815 * Revision 1.3 2001/05/20 01:21:20 jongfoster
816 * Version 2.9.4 checkin.
817 * - Merged popupfile and cookiefile, and added control over PCRS
818 * filtering, in new "permissionsfile".
819 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
820 * file error you now get a message box (in the Win32 GUI) rather
821 * than the program exiting with no explanation.
822 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
824 * - Removed tabs from "config"
825 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
826 * - Bumped up version number.
828 * Revision 1.2 2001/05/17 22:34:44 oes
829 * - Added hint on GIF char array generation to jcc.c
830 * - Cleaned CRLF's from the sources and related files
831 * - Repaired logging for REF and FRC
833 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
834 * Initial import of version 2.9.3 source tree
837 *********************************************************************/
843 #include <sys/types.h>
852 # ifndef FEATURE_PTHREAD
856 # include <windows.h>
857 # include <process.h>
858 # endif /* ndef FEATURE_PTHREAD */
861 # ifndef _WIN_CONSOLE
863 # endif /* ndef _WIN_CONSOLE */
864 # include "w32svrapi.h"
866 #else /* ifndef _WIN32 */
868 # if !defined (__OS2__)
870 # include <sys/wait.h>
871 # endif /* ndef __OS2__ */
872 # include <sys/time.h>
873 # include <sys/stat.h>
874 # include <sys/ioctl.h>
877 #include <sys/termios.h>
888 # include <socket.h> /* BeOS has select() for sockets only. */
889 # include <OS.h> /* declarations for threads and stuff. */
892 # if defined(__EMX__) || defined(__OS2__)
893 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
898 #define bzero(B,N) memset(B,0x00,n)
913 #include "killpopup.h"
914 #include "miscutil.h"
916 #include "jbsockets.h"
921 #include "urlmatch.h"
923 const char jcc_h_rcs[] = JCC_H_VERSION;
924 const char project_h_rcs[] = PROJECT_H_VERSION;
927 struct client_state clients[1];
928 struct file_list files[1];
930 #ifdef FEATURE_STATISTICS
931 int urls_read = 0; /* total nr of urls read inc rejected */
932 int urls_rejected = 0; /* total nr of urls rejected */
933 #endif /* def FEATURE_STATISTICS */
935 #ifdef FEATURE_GRACEFUL_TERMINATION
939 static void listen_loop(void);
940 static void chat(struct client_state *csp);
942 void serve(struct client_state *csp);
943 #else /* ifndef AMIGA */
944 static void serve(struct client_state *csp);
945 #endif /* def AMIGA */
948 static int32 server_thread(void *data);
949 #endif /* def __BEOS__ */
952 #define sleep(N) Sleep(((N) * 1000))
956 #define sleep(N) DosSleep(((N) * 100))
959 #ifdef FEATURE_PTHREAD
960 pthread_mutex_t log_mutex;
961 pthread_mutex_t log_init_mutex;
963 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
964 pthread_mutex_t resolver_mutex;
965 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
967 #ifndef HAVE_GMTIME_R
968 pthread_mutex_t gmtime_mutex;
969 #endif /* ndef HAVE_GMTIME_R */
971 #ifndef HAVE_LOCALTIME_R
972 pthread_mutex_t localtime_mutex;
973 #endif /* ndef HAVE_GMTIME_R */
976 pthread_mutex_t rand_mutex;
977 #endif /* ndef HAVE_RANDOM */
979 #endif /* FEATURE_PTHREAD */
981 #if defined(unix) || defined(__EMX__)
982 const char *basedir = NULL;
983 const char *pidfile = NULL;
984 int received_hup_signal = 0;
985 #endif /* defined unix */
987 /* The vanilla wafer. */
988 static const char VANILLA_WAFER[] =
989 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
990 "Do_not_send_me_any_copyrighted_information_other_than_the_"
991 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
992 "In_particular_do_not_send_me_any_cookies_that_"
993 "are_subject_to_a_claim_of_copyright_by_anybody._"
994 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
995 "(copyright_or_otherwise)_applying_to_any_cookie._";
997 /* HTTP snipplets. */
998 const static char CSUCCEED[] =
999 "HTTP/1.0 200 Connection established\n"
1000 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
1002 const static char CHEADER[] =
1003 "HTTP/1.0 400 Invalid header received from browser\r\n"
1004 "Proxy-Agent: Privoxy " VERSION "\r\n"
1005 "Content-Type: text/plain\r\n"
1006 "Connection: close\r\n\r\n"
1007 "Invalid header received from browser.\r\n";
1009 const static char CFORBIDDEN[] =
1010 "HTTP/1.0 403 Connection not allowable\r\n"
1011 "Proxy-Agent: Privoxy " VERSION "\r\n"
1012 "X-Hint: If you read this message interactively, then you know why this happens ,-)\r\n"
1013 "Connection: close\r\n\r\n";
1015 const static char FTP_RESPONSE[] =
1016 "HTTP/1.0 400 Invalid request received from browser\r\n"
1017 "Content-Type: text/plain\r\n"
1018 "Connection: close\r\n\r\n"
1019 "Invalid request. Privoxy doesn't support FTP.\r\n";
1021 const static char GOPHER_RESPONSE[] =
1022 "HTTP/1.0 400 Invalid request received from browser\r\n"
1023 "Content-Type: text/plain\r\n"
1024 "Connection: close\r\n\r\n"
1025 "Invalid request. Privoxy doesn't support gopher.\r\n";
1027 /* XXX: should be a template */
1028 const static char MISSING_DESTINATION_RESPONSE[] =
1029 "HTTP/1.0 400 Bad request received from browser\r\n"
1030 "Proxy-Agent: Privoxy " VERSION "\r\n"
1031 "Content-Type: text/plain\r\n"
1032 "Connection: close\r\n\r\n"
1033 "Bad request. Privoxy was unable to extract the destination.\r\n";
1035 /* XXX: should be a template */
1036 const static char NO_SERVER_DATA_RESPONSE[] =
1037 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1038 "Proxy-Agent: Privoxy " VERSION "\r\n"
1039 "Content-Type: text/plain\r\n"
1040 "Connection: close\r\n\r\n"
1041 "Empty server or forwarder response.\r\n"
1042 "The connection was closed without sending any data.\r\n";
1044 /* XXX: should be a template */
1045 const static char NULL_BYTE_RESPONSE[] =
1046 "HTTP/1.0 400 Bad request received from browser\r\n"
1047 "Proxy-Agent: Privoxy " VERSION "\r\n"
1048 "Content-Type: text/plain\r\n"
1049 "Connection: close\r\n\r\n"
1050 "Bad request. Null byte(s) before end of request.\r\n";
1052 /* XXX: should be a template */
1053 const static char MESSED_UP_REQUEST_RESPONSE[] =
1054 "HTTP/1.0 400 Malformed request after rewriting\r\n"
1055 "Proxy-Agent: Privoxy " VERSION "\r\n"
1056 "Content-Type: text/plain\r\n"
1057 "Connection: close\r\n\r\n"
1058 "Bad request. Messed up with header filters.\r\n";
1060 /* A function to crunch a response */
1061 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
1063 typedef char *(*filter_function_ptr)();
1065 /* Crunch function flags */
1066 #define CF_NO_FLAGS 0
1067 /* Cruncher applies to forced requests as well */
1068 #define CF_IGNORE_FORCE 1
1069 /* Crunched requests are counted for the block statistics */
1070 #define CF_COUNT_AS_REJECT 2
1072 /* A crunch function and its flags */
1075 const crunch_func_ptr cruncher;
1079 /* Complete list of cruncher functions */
1080 const static struct cruncher crunchers_all[] = {
1081 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
1082 { block_url, CF_COUNT_AS_REJECT },
1083 #ifdef FEATURE_TRUST
1084 { trust_url, CF_COUNT_AS_REJECT },
1085 #endif /* def FEATURE_TRUST */
1086 { redirect_url, CF_NO_FLAGS },
1087 { dispatch_cgi, CF_IGNORE_FORCE},
1091 /* Light version, used after tags are applied */
1092 const static struct cruncher crunchers_light[] = {
1093 { block_url, CF_COUNT_AS_REJECT },
1094 { redirect_url, CF_NO_FLAGS },
1099 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1100 /*********************************************************************
1102 * Function : sig_handler
1104 * Description : Signal handler for different signals.
1105 * Exit gracefully on TERM and INT
1106 * or set a flag that will cause the errlog
1107 * to be reopened by the main thread on HUP.
1110 * 1 : the_signal = the signal cause this function to call
1114 *********************************************************************/
1115 static void sig_handler(int the_signal)
1121 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1132 received_hup_signal = 1;
1137 * We shouldn't be here, unless we catch signals
1138 * in main() that we can't handle here!
1140 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1148 /*********************************************************************
1150 * Function : client_protocol_is_unsupported
1152 * Description : Checks if the client used a known unsupported
1153 * protocol and deals with it by sending an error
1157 * 1 : csp = Current client state (buffers, headers, etc...)
1158 * 2 : req = the first request line send by the client
1160 * Returns : TRUE if an error response has been generated, or
1161 * FALSE if the request doesn't look invalid.
1163 *********************************************************************/
1164 int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1166 char buf[BUFFER_SIZE];
1169 * If it's a FTP or gopher request, we don't support it.
1171 * These checks are better than nothing, but they might
1172 * not work in all configurations and some clients might
1173 * have problems digesting the answer.
1175 * They should, however, never cause more problems than
1176 * Privoxy's old behaviour (returning the misleading HTML
1179 * "Could not resolve http://(ftp|gopher)://example.org").
1181 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1183 if (!strncmpic(req, "GET ftp://", 10))
1185 strlcpy(buf, FTP_RESPONSE, sizeof(buf));
1186 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as FTP proxy: %s",
1187 csp->ip_addr_str, req);
1191 strlcpy(buf, GOPHER_RESPONSE, sizeof(buf));
1192 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as gopher proxy: %s",
1193 csp->ip_addr_str, req);
1195 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1197 write_socket(csp->cfd, buf, strlen(buf));
1206 /*********************************************************************
1208 * Function : get_request_destination_elsewhere
1210 * Description : If the client's request was redirected into
1211 * Privoxy without the client's knowledge,
1212 * the request line lacks the destination host.
1214 * This function tries to get it elsewhere,
1215 * provided accept-intercepted-requests is enabled.
1217 * "Elsewhere" currently only means "Host: header",
1218 * but in the future we may ask the redirecting
1219 * packet filter to look the destination up.
1221 * If the destination stays unknown, an error
1222 * response is send to the client and headers
1223 * are freed so that chat() can return directly.
1226 * 1 : csp = Current client state (buffers, headers, etc...)
1227 * 2 : headers = a header list
1229 * Returns : JB_ERR_OK if the destination is now known, or
1230 * JB_ERR_PARSE if it isn't.
1232 *********************************************************************/
1233 jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1237 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1239 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1240 " Privoxy isn't configured to accept intercepted requests.",
1241 csp->ip_addr_str, csp->http->cmd);
1242 /* XXX: Use correct size */
1243 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1244 csp->ip_addr_str, csp->http->cmd);
1246 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1247 destroy_list(headers);
1249 return JB_ERR_PARSE;
1251 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1253 /* Split the domain we just got for pattern matching */
1254 init_domain_components(csp->http);
1260 /* We can't work without destination. Go spread the news.*/
1262 req = list_to_text(headers);
1264 /* XXX: Use correct size */
1265 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1266 csp->ip_addr_str, csp->http->cmd);
1267 log_error(LOG_LEVEL_ERROR,
1268 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1269 csp->ip_addr_str, csp->http->cmd, req);
1272 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
1273 destroy_list(headers);
1275 return JB_ERR_PARSE;
1278 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1279 * to get the destination IP address, use it as host directly
1280 * or do a reverse DNS lookup first.
1285 /*********************************************************************
1287 * Function : get_server_headers
1289 * Description : Parses server headers in iob and fills them
1290 * into csp->headers so that they can later be
1294 * 1 : csp = Current client state (buffers, headers, etc...)
1296 * Returns : JB_ERR_OK if everything went fine, or
1297 * JB_ERR_PARSE if the headers were incomplete.
1299 *********************************************************************/
1300 jb_err get_server_headers(struct client_state *csp)
1302 int continue_hack_in_da_house = 0;
1305 while (((header = get_header(csp)) != NULL) || continue_hack_in_da_house)
1310 * continue hack in da house. Ignore the ending of
1311 * this head and continue enlisting header lines.
1312 * The reason is described below.
1314 enlist(csp->headers, "");
1315 continue_hack_in_da_house = 0;
1318 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1321 * It's a bodyless continue response, don't
1322 * stop header parsing after reaching it's end.
1324 * As a result Privoxy will concatenate the
1325 * next response's head and parse and deliver
1326 * the headers as if they belonged to one request.
1328 * The client will separate them because of the
1329 * empty line between them.
1331 * XXX: What we're doing here is clearly against
1332 * the intended purpose of the continue header,
1333 * and under some conditions (HTTP/1.0 client request)
1334 * it's a standard violation.
1336 * Anyway, "sort of against the spec" is preferable
1337 * to "always getting confused by Continue responses"
1338 * (Privoxy's behaviour before this hack was added)
1340 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1341 continue_hack_in_da_house = 1;
1343 else if (*header == '\0')
1346 * If the header is empty, but the Continue hack
1347 * isn't active, we can assume that we reached the
1348 * end of the buffer before we hit the end of the
1351 * Inform the caller an let it decide how to handle it.
1353 return JB_ERR_PARSE;
1357 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1360 * XXX: Should we quit the request and return a
1361 * out of memory error page instead?
1363 log_error(LOG_LEVEL_ERROR,
1364 "Out of memory while enlisting server headers. %s lost.",
1374 /*********************************************************************
1376 * Function : crunch_reason
1378 * Description : Translates the crunch reason code into a string.
1381 * 1 : rsp = a http_response
1383 * Returns : A string with the crunch reason or an error description.
1385 *********************************************************************/
1386 const char *crunch_reason(const struct http_response *rsp)
1388 char * reason = NULL;
1390 assert(rsp != NULL);
1393 return "Internal error while searching for crunch reason";
1396 switch (rsp->reason)
1398 case RSP_REASON_UNSUPPORTED:
1399 reason = "Unsupported HTTP feature";
1401 case RSP_REASON_BLOCKED:
1404 case RSP_REASON_UNTRUSTED:
1405 reason = "Untrusted";
1407 case RSP_REASON_REDIRECTED:
1408 reason = "Redirected";
1410 case RSP_REASON_CGI_CALL:
1411 reason = "CGI Call";
1413 case RSP_REASON_NO_SUCH_DOMAIN:
1414 reason = "DNS failure";
1416 case RSP_REASON_FORWARDING_FAILED:
1417 reason = "Forwarding failed";
1419 case RSP_REASON_CONNECT_FAILED:
1420 reason = "Connection failure";
1422 case RSP_REASON_OUT_OF_MEMORY:
1423 reason = "Out of memory (may mask other reasons)";
1426 reason = "No reason recorded";
1434 /*********************************************************************
1436 * Function : send_crunch_response
1438 * Description : Delivers already prepared response for
1439 * intercepted requests, logs the interception
1440 * and frees the response.
1443 * 1 : csp = Current client state (buffers, headers, etc...)
1444 * 1 : rsp = Fully prepared response. Will be freed on exit.
1446 * Returns : Nothing.
1448 *********************************************************************/
1449 void send_crunch_response(struct client_state *csp, struct http_response *rsp)
1451 const struct http_request *http = csp->http;
1452 char status_code[4];
1454 assert(rsp != NULL);
1455 assert(rsp->head != NULL);
1460 * Not supposed to happen. If it does
1461 * anyway, treat it as an unknown error.
1463 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1464 /* return code doesn't matter */
1469 /* If rsp is still NULL, we have serious internal problems. */
1470 log_error(LOG_LEVEL_FATAL,
1471 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1475 * Extract the status code from the actual head
1476 * that was send to the client. It is the only
1477 * way to get it right for all requests, including
1478 * the fixed ones for out-of-memory problems.
1480 * A head starts like this: 'HTTP/1.1 200...'
1484 status_code[0] = rsp->head[9];
1485 status_code[1] = rsp->head[10];
1486 status_code[2] = rsp->head[11];
1487 status_code[3] = '\0';
1489 /* Write the answer to the client */
1490 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1491 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1493 /* There is nothing we can do about it. */
1494 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1497 /* Log that the request was crunched and why. */
1498 log_error(LOG_LEVEL_GPC, "%s%s crunch! (%s)",
1499 http->hostport, http->path, crunch_reason(rsp));
1500 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %d",
1501 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1503 /* Clean up and return */
1504 if (cgi_error_memory() != rsp)
1506 free_http_response(rsp);
1512 /*********************************************************************
1514 * Function : request_contains_null_bytes
1516 * Description : Checks for NULL bytes in the request and sends
1517 * an error message to the client if any were found.
1520 * 1 : csp = Current client state (buffers, headers, etc...)
1521 * 2 : buf = Data from the client's request to check.
1522 * 3 : len = The data length.
1524 * Returns : TRUE if the request contained one or more NULL bytes, or
1527 *********************************************************************/
1528 int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1530 size_t c_len; /* Request lenght when treated as C string */
1532 c_len = strlen(buf);
1537 * Null byte(s) found. Log the request,
1538 * return an error response and hang up.
1540 size_t tmp_len = c_len;
1545 * Replace NULL byte(s) with '°' characters
1546 * so the request can be logged as string.
1547 * XXX: Is there a better replacement character?
1550 tmp_len += strlen(buf+tmp_len);
1551 } while (tmp_len < len);
1553 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1554 "(length=%d, strlen=%d).", csp->ip_addr_str, len, c_len);
1555 log_error(LOG_LEVEL_HEADER,
1556 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1558 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
1560 /* XXX: Log correct size */
1561 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1570 /*********************************************************************
1572 * Function : crunch_response_triggered
1574 * Description : Checks if the request has to be crunched,
1575 * and delivers the crunch response if necessary.
1578 * 1 : csp = Current client state (buffers, headers, etc...)
1579 * 2 : crunchers = list of cruncher functions to run
1581 * Returns : TRUE if the request was answered with a crunch response
1584 *********************************************************************/
1585 int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
1587 struct http_response *rsp = NULL;
1588 const struct cruncher *c;
1590 for (c = crunchers; c->cruncher != NULL; c++)
1593 * Check the cruncher if either Privoxy is toggled
1594 * on and the request isn't forced, or if the cruncher
1595 * applies to forced requests as well.
1597 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
1598 !(csp->flags & CSP_FLAG_FORCED)) ||
1599 (c->flags & CF_IGNORE_FORCE))
1601 rsp = c->cruncher(csp);
1604 /* Deliver, log and free the interception response. */
1605 send_crunch_response(csp, rsp);
1606 #ifdef FEATURE_STATISTICS
1607 if (c->flags & CF_COUNT_AS_REJECT)
1609 csp->flags |= CSP_FLAG_REJECTED;
1611 #endif /* def FEATURE_STATISTICS */
1622 /*********************************************************************
1624 * Function : build_request_line
1626 * Description : Builds the HTTP request line.
1628 * If a HTTP forwarder is used it expects the whole URL,
1629 * web servers only get the path.
1632 * 1 : csp = Current client state (buffers, headers, etc...)
1633 * 2 : fwd = The forwarding spec used for the request
1634 * XXX: Should use http->fwd instead.
1635 * 3 : request_line = The old request line which will be replaced.
1637 * Returns : Nothing. Terminates in case of memory problems.
1639 *********************************************************************/
1640 void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
1642 struct http_request *http = csp->http;
1644 assert(http->ssl == 0);
1647 * Downgrade http version from 1.1 to 1.0
1648 * if +downgrade action applies.
1650 if ( (csp->action->flags & ACTION_DOWNGRADE)
1651 && (!strcmpic(http->ver, "HTTP/1.1")))
1654 http->ver = strdup("HTTP/1.0");
1656 if (http->ver == NULL)
1658 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1663 * Rebuild the request line.
1665 freez(*request_line);
1666 *request_line = strdup(http->gpc);
1667 string_append(request_line, " ");
1669 if (fwd->forward_host)
1671 string_append(request_line, http->url);
1675 string_append(request_line, http->path);
1677 string_append(request_line, " ");
1678 string_append(request_line, http->ver);
1680 if (*request_line == NULL)
1682 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1684 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
1688 /*********************************************************************
1690 * Function : change_request_destination
1692 * Description : Parse a (rewritten) request line and regenerate
1693 * the http request data.
1696 * 1 : csp = Current client state (buffers, headers, etc...)
1698 * Returns : Forwards the parse_http_request() return code.
1699 * Terminates in case of memory problems.
1701 *********************************************************************/
1702 jb_err change_request_destination(struct client_state *csp)
1704 struct http_request *http = csp->http;
1707 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
1708 free_http_request(http);
1709 err = parse_http_request(csp->headers->first->str, http, csp);
1710 if (JB_ERR_OK != err)
1712 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
1713 jb_err_to_string(err));
1715 http->ocmd = strdup(http->cmd); /* XXX: ocmd is a misleading name */
1716 if (http->ocmd == NULL)
1718 log_error(LOG_LEVEL_FATAL, "Out of memory copying rewritten HTTP request line");
1725 /*********************************************************************
1727 * Function : get_filter_function
1729 * Description : Decides which content filter function has
1730 * to be applied (if any).
1732 * XXX: Doesn't handle filter_popups()
1733 * because of the different prototype. Probably
1734 * we should ditch filter_popups() anyway, it's
1735 * even less reliable than popup blocking based
1739 * 1 : csp = Current client state (buffers, headers, etc...)
1741 * Returns : The content filter function to run, or
1742 * NULL if no content filter is active
1744 *********************************************************************/
1745 filter_function_ptr get_filter_function(struct client_state *csp)
1747 filter_function_ptr filter_function = NULL;
1750 * Are we enabling text mode by force?
1752 if (csp->action->flags & ACTION_FORCE_TEXT_MODE)
1755 * Do we really have to?
1757 if (csp->content_type & CT_TEXT)
1759 log_error(LOG_LEVEL_HEADER, "Text mode is already enabled.");
1763 csp->content_type |= CT_TEXT;
1764 log_error(LOG_LEVEL_HEADER, "Text mode enabled by force. Take cover!");
1768 if (!(csp->content_type & CT_DECLARED))
1771 * The server didn't bother to declare a MIME-Type.
1772 * Assume it's text that can be filtered.
1774 * This also regulary happens with 304 responses,
1775 * therefore logging anything here would cause
1778 csp->content_type |= CT_TEXT;
1783 * Choose the applying filter function based on
1784 * the content type and action settings.
1786 if ((csp->content_type & CT_TEXT) &&
1787 (csp->rlist != NULL) &&
1788 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER])))
1790 filter_function = pcrs_filter_response;
1792 else if ((csp->content_type & CT_GIF) &&
1793 (csp->action->flags & ACTION_DEANIMATE))
1795 filter_function = gif_deanimate_response;
1797 else if ((csp->content_type & CT_JPEG) &&
1798 (csp->action->flags & ACTION_JPEG_INSPECT))
1800 filter_function = jpeg_inspect_response;
1803 return filter_function;
1806 /*********************************************************************
1810 * Description : Once a connection to the client has been accepted,
1811 * this function is called (via serve()) to handle the
1812 * main business of the communication. When this
1813 * function returns, the caller must close the client
1816 * FIXME: chat is nearly thousand lines long.
1820 * 1 : csp = Current client state (buffers, headers, etc...)
1822 * Returns : Nothing.
1824 *********************************************************************/
1825 static void chat(struct client_state *csp)
1827 char buf[BUFFER_SIZE];
1835 int ms_iis5_hack = 0;
1836 size_t byte_count = 0;
1837 int forwarded_connect_retries = 0;
1838 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
1839 const struct forward_spec * fwd;
1840 struct http_request *http;
1841 int len; /* for buffer sizes (and negative error codes) */
1843 #ifdef FEATURE_KILL_POPUPS
1844 int block_popups_now = 0; /* bool, 1==currently blocking popups */
1845 #endif /* def FEATURE_KILL_POPUPS */
1847 /* Function that does the content filtering for the current request */
1848 filter_function_ptr content_filter = NULL;
1850 /* Skeleton for HTTP response, if we should intercept the request */
1851 struct http_response *rsp;
1853 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1854 struct list header_list;
1855 struct list *headers = &header_list;
1859 memset(buf, 0, sizeof(buf));
1862 * Read the client's request. Note that since we're not using select() we
1863 * could get blocked here if a client connected, then didn't say anything!
1868 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1870 if (len <= 0) break; /* error! */
1873 * If there is no memory left for buffering the
1874 * request, there is nothing we can do but hang up
1876 if (add_to_iob(csp, buf, len))
1881 req = get_header(csp);
1883 } while ((NULL != req) && ('\0' == *req));
1887 /* Request received. Validate and parse it. */
1891 * XXX: Temporary disabled to prevent problems
1892 * with POST requests whose bodies are allowed to
1893 * contain NULL bytes. BR#1730105.
1895 * The main purpose of this check is to properly
1896 * log stuff like BitTorrent traffic and other junk
1897 * that hits public proxies. It's not required for
1898 * Privoxy to functions as those requests are discarded
1901 * It probably should be rewritten to only check
1902 * the head of the request. Another option would
1903 * be to let all POST requests pass, although that
1904 * may not be good enough.
1906 if (request_contains_null_bytes(csp, buf, len))
1908 /* NULL bytes found and dealt with, just hang up. */
1913 /* Does the request line look invalid? */
1914 if (client_protocol_is_unsupported(csp, req))
1917 * Yes. The request has already been
1918 * answered with a error response, the buffers
1919 * were freed and we're done with chatting.
1924 #ifdef FEATURE_FORCE_LOAD
1926 * If this request contains the FORCE_PREFIX and blocks
1927 * aren't enforced, get rid of it and set the force flag.
1929 if (strstr(req, FORCE_PREFIX))
1931 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
1933 log_error(LOG_LEVEL_FORCE,
1934 "Ignored force prefix in request: \"%s\".", req);
1938 strclean(req, FORCE_PREFIX);
1939 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
1940 csp->flags |= CSP_FLAG_FORCED;
1944 #endif /* def FEATURE_FORCE_LOAD */
1945 err = parse_http_request(req, http, csp);
1946 if (JB_ERR_OK != err)
1948 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", jb_err_to_string(err));
1954 if (http->cmd == NULL)
1956 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1957 /* XXX: Use correct size */
1958 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1959 log_error(LOG_LEVEL_ERROR, "Invalid header received from %s.", csp->ip_addr_str);
1961 free_http_request(http);
1965 /* grab the rest of the client's headers */
1969 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1971 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1974 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1979 * If there is no memory left for buffering the
1980 * request, there is nothing we can do but hang up
1982 if (add_to_iob(csp, buf, len))
1989 if (p == NULL) break;
1996 if (http->host == NULL)
1999 * If we still don't know the request destination,
2000 * the request is invalid or the client uses
2001 * Privoxy without its knowledge.
2003 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
2006 * Our attempts to get the request destination
2007 * elsewhere failed or Privoxy is configured
2008 * to only accept proxy requests.
2010 * An error response has already been send
2011 * and we're done here.
2018 * Determine the actions for this URL
2020 #ifdef FEATURE_TOGGLE
2021 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
2023 /* Most compatible set of actions (i.e. none) */
2024 init_current_action(csp->action);
2027 #endif /* ndef FEATURE_TOGGLE */
2029 url_actions(http, csp);
2033 * Save a copy of the original request for logging
2035 http->ocmd = strdup(http->cmd);
2037 if (http->ocmd == NULL)
2039 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
2042 enlist(csp->headers, http->cmd);
2044 /* Append the previously read headers */
2045 list_append_list_unique(csp->headers, headers);
2046 destroy_list(headers);
2049 * If the user has not supplied any wafers, and the user has not
2050 * told us to suppress the vanilla wafer, then send the vanilla wafer.
2052 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
2053 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
2055 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
2058 err = sed(client_patterns, add_client_headers, csp);
2059 if (JB_ERR_OK != err)
2061 assert(err == JB_ERR_PARSE);
2062 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers");
2064 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2066 if (strcmp(http->cmd, csp->headers->first->str))
2069 * A header filter rewrote the request line,
2070 * modify the http request accordingly.
2072 if (JB_ERR_OK != change_request_destination(csp))
2074 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
2075 /* XXX: Use correct size */
2076 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
2077 log_error(LOG_LEVEL_ERROR, "Invalid request line after applying header filters.");
2079 free_http_request(http);
2084 /* decide how to route the HTTP request */
2085 if (NULL == (fwd = forward_url(http, csp)))
2087 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
2088 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2091 /* build the http request to send to the server
2092 * we have to do one of the following:
2094 * create = use the original HTTP request to create a new
2095 * HTTP request that has either the path component
2096 * without the http://domainspec (w/path) or the
2097 * full orininal URL (w/url)
2098 * Note that the path and/or the HTTP version may
2099 * have been altered by now.
2101 * connect = Open a socket to the host:port of the server
2102 * and short-circuit server and client socket.
2104 * pass = Pass the request unchanged if forwarding a CONNECT
2105 * request to a parent proxy. Note that we'll be sending
2106 * the CFAIL message ourselves if connecting to the parent
2107 * fails, but we won't send a CSUCCEED message if it works,
2108 * since that would result in a double message (ours and the
2109 * parent's). After sending the request to the parent, we simply
2112 * here's the matrix:
2115 * +--------+--------+
2117 * 0 | create | connect|
2119 * Forwarding +--------+--------+
2121 * 1 | create | pass |
2123 * +--------+--------+
2128 * Check if a CONNECT request is allowable:
2129 * In the absence of a +limit-connect action, allow only port 443.
2130 * If there is an action, allow whatever matches the specificaton.
2134 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
2135 || (csp->action->flags & ACTION_LIMIT_CONNECT
2136 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
2138 if (csp->action->flags & ACTION_TREAT_FORBIDDEN_CONNECTS_LIKE_BLOCKS)
2141 * The response may confuse some clients,
2142 * but makes unblocking easier.
2144 log_error(LOG_LEVEL_ERROR, "Marking suspicious CONNECT request from %s for blocking.",
2146 csp->action->flags |= ACTION_BLOCK;
2151 write_socket(csp->cfd, CFORBIDDEN, strlen(CFORBIDDEN));
2152 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
2153 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
2155 list_remove_all(csp->headers);
2164 freez(csp->headers->first->str);
2165 build_request_line(csp, fwd, &csp->headers->first->str);
2168 hdr = list_to_text(csp->headers);
2171 /* FIXME Should handle error properly */
2172 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2176 * We have a request. Check if one of the crunchers wants it.
2178 if (crunch_response_triggered(csp, crunchers_all))
2181 * Yes. The client got the crunch response
2182 * and we are done here after cleaning up.
2185 list_remove_all(csp->headers);
2191 * The headers can't be removed earlier because
2192 * they were still needed for the referrer check
2193 * in case of CGI crunches.
2195 * XXX: Would it be worth to move the referrer check
2196 * into client_referrer() and set a flag if it's trusted?
2198 list_remove_all(csp->headers);
2200 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2202 if (fwd->forward_host)
2204 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2205 fwd->forward_host, fwd->forward_port, http->hostport);
2209 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2212 /* here we connect to the server, gateway, or the forwarder */
2214 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
2215 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2217 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
2218 forwarded_connect_retries, http->hostport);
2221 if (csp->sfd == JB_INVALID_SOCKET)
2223 if (fwd->type != SOCKS_NONE)
2226 rsp = error_response(csp, "forwarding-failed", errno);
2228 else if (errno == EINVAL)
2230 rsp = error_response(csp, "no-such-domain", errno);
2234 rsp = error_response(csp, "connect-failed", errno);
2235 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2240 /* Write the answer to the client */
2243 send_crunch_response(csp, rsp);
2250 if (fwd->forward_host || (http->ssl == 0))
2252 /* write the client's (modified) header to the server
2253 * (along with anything else that may be in the buffer)
2256 if (write_socket(csp->sfd, hdr, strlen(hdr))
2257 || (flush_socket(csp->sfd, csp) < 0))
2259 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
2262 rsp = error_response(csp, "connect-failed", errno);
2266 send_crunch_response(csp, rsp);
2276 * We're running an SSL tunnel and we're not forwarding,
2277 * so just send the "connect succeeded" message to the
2278 * client, flush the rest, and get out of the way.
2280 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
2288 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2290 /* we're finished with the client's header */
2293 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
2295 /* pass data between the client and server
2296 * until one or the other shuts down the connection.
2305 * FD_ZERO here seems to point to an errant macro which crashes.
2306 * So do this by hand for now...
2308 memset(&rfds,0x00,sizeof(fd_set));
2312 FD_SET(csp->cfd, &rfds);
2313 FD_SET(csp->sfd, &rfds);
2315 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
2319 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2323 /* this is the body of the browser's request
2324 * just read it and write it.
2327 if (FD_ISSET(csp->cfd, &rfds))
2329 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2333 break; /* "game over, man" */
2336 if (write_socket(csp->sfd, buf, (size_t)len))
2338 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2345 * The server wants to talk. It could be the header or the body.
2346 * If `hdr' is null, then it's the header otherwise it's the body.
2347 * FIXME: Does `hdr' really mean `host'? No.
2351 if (FD_ISSET(csp->sfd, &rfds))
2354 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2358 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2360 if (http->ssl && (fwd->forward_host == NULL))
2363 * Just hang up. We already confirmed the client's CONNECT
2364 * request with status code 200 and unencrypted content is
2365 * no longer welcome.
2367 log_error(LOG_LEVEL_ERROR,
2368 "CONNECT already confirmed. Unable to tell the client about the problem.");
2372 rsp = error_response(csp, "connect-failed", errno);
2376 send_crunch_response(csp, rsp);
2382 /* Add a trailing zero. This lets filter_popups
2383 * use string operations.
2387 #ifdef FEATURE_KILL_POPUPS
2388 /* Filter the popups on this read. */
2389 if (block_popups_now)
2391 filter_popups(buf, csp);
2393 #endif /* def FEATURE_KILL_POPUPS */
2395 /* Normally, this would indicate that we've read
2396 * as much as the server has sent us and we can
2397 * close the client connection. However, Microsoft
2398 * in its wisdom has released IIS/5 with a bug that
2399 * prevents it from sending the trailing \r\n in
2400 * a 302 redirect header (and possibly other headers).
2401 * To work around this if we've haven't parsed
2402 * a full header we'll append a trailing \r\n
2403 * and see if this now generates a valid one.
2405 * This hack shouldn't have any impacts. If we've
2406 * already transmitted the header or if this is a
2407 * SSL connection, then we won't bother with this
2408 * hack. So we only work on partially received
2409 * headers. If we append a \r\n and this still
2410 * doesn't generate a valid header, then we won't
2411 * transmit anything to the client.
2416 if (server_body || http->ssl)
2419 * If we have been buffering up the document,
2420 * now is the time to apply content modification
2421 * and send the result to the client.
2426 * If the content filter fails, use the original
2427 * buffer and length.
2428 * (see p != NULL ? p : csp->iob->cur below)
2430 if (NULL == (p = (*content_filter)(csp)))
2432 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2435 if (JB_ERR_OK != sed(server_patterns_light, NULL, csp))
2437 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
2440 hdr = list_to_text(csp->headers);
2443 /* FIXME Should handle error properly */
2444 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2448 * Shouldn't happen because this was the second sed run
2449 * and tags are only created for the first one.
2451 assert(!crunch_response_triggered(csp, crunchers_all));
2453 if (write_socket(csp->cfd, hdr, strlen(hdr))
2454 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
2456 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2466 break; /* "game over, man" */
2470 * This is NOT the body, so
2471 * Let's pretend the server just sent us a blank line.
2473 snprintf(buf, sizeof(buf), "\r\n");
2474 len = (int)strlen(buf);
2477 * Now, let the normal header parsing algorithm below do its
2478 * job. If it fails, we'll exit instead of continuing.
2485 * If this is an SSL connection or we're in the body
2486 * of the server document, just write it to the client,
2487 * unless we need to buffer the body for later content-filtering
2490 if (server_body || http->ssl)
2495 * If there is no memory left for buffering the content, or the buffer limit
2496 * has been reached, switch to non-filtering mode, i.e. make & write the
2497 * header, flush the iob and buf, and get out of the way.
2499 if (add_to_iob(csp, buf, len))
2504 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
2505 if (JB_ERR_OK != sed(server_patterns, add_server_headers, csp))
2507 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
2509 hdr = list_to_text(csp->headers);
2513 * Memory is too tight to even generate the header.
2514 * Send our static "Out-of-memory" page.
2516 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2517 rsp = cgi_error_memory();
2518 send_crunch_response(csp, rsp);
2523 if (crunch_response_triggered(csp, crunchers_light))
2526 * One of the tags created by a server-header
2527 * tagger triggered a crunch. We already
2528 * delivered the crunch response to the client
2529 * and are done here after cleaning up.
2535 hdrlen = strlen(hdr);
2537 if (write_socket(csp->cfd, hdr, hdrlen)
2538 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
2539 || (write_socket(csp->cfd, buf, (size_t)len)))
2541 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
2547 byte_count += hdrlen + (size_t)flushed + (size_t)len;
2549 content_filter = NULL;
2556 if (write_socket(csp->cfd, buf, (size_t)len))
2558 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2562 byte_count += (size_t)len;
2567 /* we're still looking for the end of the
2568 * server's header ... (does that make header
2569 * parsing an "out of body experience" ?
2573 * buffer up the data we just read. If that fails,
2574 * there's little we can do but send our static
2575 * out-of-memory page.
2577 if (add_to_iob(csp, buf, len))
2579 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2580 rsp = cgi_error_memory();
2581 send_crunch_response(csp, rsp);
2586 /* Convert iob into something sed() can digest */
2587 if (JB_ERR_PARSE == get_server_headers(csp))
2591 /* Well, we tried our MS IIS/5
2592 * hack and it didn't work.
2593 * The header is incomplete
2594 * and there isn't anything
2595 * we can do about it.
2601 /* Since we have to wait for
2602 * more from the server before
2603 * we can parse the headers
2604 * we just continue here.
2610 /* Did we actually get anything? */
2611 if (NULL == csp->headers->first)
2613 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
2614 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2615 write_socket(csp->cfd, NO_SERVER_DATA_RESPONSE, strlen(NO_SERVER_DATA_RESPONSE));
2616 free_http_request(http);
2620 /* we have now received the entire header.
2621 * filter it and send the result to the client
2623 if (JB_ERR_OK != sed(server_patterns, add_server_headers, csp))
2625 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
2627 hdr = list_to_text(csp->headers);
2630 /* FIXME Should handle error properly */
2631 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2634 if (crunch_response_triggered(csp, crunchers_light))
2637 * One of the tags created by a server-header
2638 * tagger triggered a crunch. We already
2639 * delivered the crunch response to the client
2640 * and are done here after cleaning up.
2645 /* Buffer and pcrs filter this if appropriate. */
2647 if (!http->ssl) /* We talk plaintext */
2650 #ifdef FEATURE_KILL_POPUPS
2651 /* Start blocking popups if appropriate. */
2652 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
2653 (csp->action->flags & ACTION_NO_POPUPS) != 0) /* Policy allows */
2655 block_popups_now = 1;
2657 * Filter the part of the body that came in the same read
2658 * as the last headers:
2660 filter_popups(csp->iob->cur, csp);
2662 #endif /* def FEATURE_KILL_POPUPS */
2663 content_filter = get_filter_function(csp);
2666 * Only write if we're not buffering for content modification
2668 if (!content_filter)
2670 /* write the server's (modified) header to
2671 * the client (along with anything else that
2672 * may be in the buffer)
2675 if (write_socket(csp->cfd, hdr, strlen(hdr))
2676 || ((len = flush_socket(csp->cfd, csp)) < 0))
2678 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
2680 /* the write failed, so don't bother
2681 * mentioning it to the client...
2682 * it probably can't hear us anyway.
2688 byte_count += (size_t)len;
2691 /* we're finished with the server's header */
2696 /* If this was a MS IIS/5 hack then it means
2697 * the server has already closed the
2698 * connection. Nothing more to read. Time
2709 return; /* huh? we should never get here */
2712 if (csp->content_length == 0)
2715 * If Privoxy didn't recalculate the
2716 * Content-Lenght, byte_count is still
2719 csp->content_length = byte_count;
2722 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
2723 csp->ip_addr_str, http->ocmd, csp->content_length);
2727 /*********************************************************************
2731 * Description : This is little more than chat. We only "serve" to
2732 * to close any socket that chat may have opened.
2735 * 1 : csp = Current client state (buffers, headers, etc...)
2739 *********************************************************************/
2741 void serve(struct client_state *csp)
2742 #else /* ifndef AMIGA */
2743 static void serve(struct client_state *csp)
2744 #endif /* def AMIGA */
2747 close_socket(csp->cfd);
2749 if (csp->sfd != JB_INVALID_SOCKET)
2751 close_socket(csp->sfd);
2754 csp->flags &= ~CSP_FLAG_ACTIVE;
2760 /*********************************************************************
2762 * Function : server_thread
2764 * Description : We only exist to call `serve' in a threaded environment.
2767 * 1 : data = Current client state (buffers, headers, etc...)
2769 * Returns : Always 0.
2771 *********************************************************************/
2772 static int32 server_thread(void *data)
2774 serve((struct client_state *) data);
2781 /*********************************************************************
2785 * Description : Print usage info & exit.
2787 * Parameters : Pointer to argv[0] for identifying ourselves
2791 *********************************************************************/
2792 void usage(const char *myname)
2794 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
2798 #endif /* defined(unix) */
2801 "[--no-daemon] [--pidfile pidfile] [--user user[.group]] "
2802 #endif /* defined(unix) */
2803 "[--version] [configfile]\n"
2804 "Aborting\n", myname);
2811 /*********************************************************************
2813 * Function : initialize_mutexes
2815 * Description : Prepares mutexes if mutex support is available.
2819 * Returns : Void, exits in case of errors.
2821 *********************************************************************/
2822 void initialize_mutexes()
2826 #ifdef FEATURE_PTHREAD
2828 * Prepare global mutex semaphores
2830 err = pthread_mutex_init(&log_mutex, 0);
2832 if (!err) err = pthread_mutex_init(&log_init_mutex, 0);
2835 * XXX: The assumptions below are a bit naive
2836 * and can cause locks that aren't necessary.
2838 * For example older FreeBSD versions (< 6.x?)
2839 * have no gethostbyname_r, but gethostbyname is
2842 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
2843 if (!err) err = pthread_mutex_init(&resolver_mutex, 0);
2844 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
2846 * XXX: should we use a single mutex for
2847 * localtime() and gmtime() as well?
2849 #ifndef HAVE_GMTIME_R
2850 if (!err) err = pthread_mutex_init(&gmtime_mutex, 0);
2851 #endif /* ndef HAVE_GMTIME_R */
2853 #ifndef HAVE_LOCALTIME_R
2854 if (!err) err = pthread_mutex_init(&localtime_mutex, 0);
2855 #endif /* ndef HAVE_GMTIME_R */
2858 if (!err) err = pthread_mutex_init(&rand_mutex, 0);
2859 #endif /* ndef HAVE_RANDOM */
2860 #endif /* FEATURE_PTHREAD */
2863 * TODO: mutex support for mingw32 would be swell.
2868 printf("Fatal error. Mutex initialization failed: %s.\n",
2877 /*********************************************************************
2881 * Description : Load the config file and start the listen loop.
2882 * This function is a lot more *sane* with the `load_config'
2883 * and `listen_loop' functions; although it stills does
2884 * a *little* too much for my taste.
2887 * 1 : argc = Number of parameters (including $0).
2888 * 2 : argv = Array of (char *)'s to the parameters.
2890 * Returns : 1 if : can't open config file, unrecognized directive,
2891 * stats requested in multi-thread mode, can't open the
2892 * log file, can't open the jar file, listen port is invalid,
2893 * any load fails, and can't bind port.
2895 * Else main never returns, the process must be signaled
2896 * to terminate execution. Or, on Windows, use the
2897 * "File", "Exit" menu option.
2899 *********************************************************************/
2901 int real_main(int argc, const char *argv[])
2903 int main(int argc, const char *argv[])
2907 unsigned int random_seed;
2909 struct passwd *pw = NULL;
2910 struct group *grp = NULL;
2919 #if !defined(_WIN32)
2927 * Parse the command line arguments
2929 * XXX: simply printing usage information in case of
2930 * invalid arguments isn't particular user friendly.
2932 while (++argc_pos < argc)
2935 /* Check to see if the service must be installed or uninstalled */
2936 if (strncmp(argv[argc_pos], "--install", 9) == 0)
2938 const char *pName = argv[argc_pos] + 9;
2941 exit( (install_service(pName)) ? 0 : 1 );
2943 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
2945 const char *pName = argv[argc_pos] + 11;
2948 exit((uninstall_service(pName)) ? 0 : 1);
2950 else if (strcmp(argv[argc_pos], "--service" ) == 0)
2952 bRunAsService = TRUE;
2953 w32_set_service_cwd();
2954 atexit(w32_service_exit_notify);
2957 #endif /* defined(_WIN32) */
2960 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2962 if (strcmp(argv[argc_pos], "--help") == 0)
2967 else if(strcmp(argv[argc_pos], "--version") == 0)
2969 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
2975 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
2980 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
2982 if (++argc_pos == argc) usage(argv[0]);
2983 pidfile = strdup(argv[argc_pos]);
2986 else if (strcmp(argv[argc_pos], "--user" ) == 0)
2988 if (++argc_pos == argc) usage(argv[argc_pos]);
2990 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
2993 if (NULL == (grp = getgrnam(p)))
2995 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
2999 if (NULL == (pw = getpwnam(argv[argc_pos])))
3001 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
3004 if (p != NULL) *--p = '\0';
3007 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
3011 #endif /* defined(unix) */
3013 else if (argc_pos + 1 != argc)
3016 * This is neither the last command line
3017 * option, nor was it recognized before,
3018 * therefore it must be invalid.
3024 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3026 configfile = argv[argc_pos];
3029 } /* -END- while (more arguments) */
3032 if ( *configfile != '/' )
3034 char cwd[BUFFER_SIZE];
3036 size_t abs_file_size;
3038 /* make config-filename absolute here */
3039 if (NULL == getcwd(cwd, sizeof(cwd)))
3041 perror("failed to get current working directory");
3046 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3047 basedir = strdup(cwd);
3049 if (NULL == basedir ||
3050 NULL == (abs_file = malloc(abs_file_size)))
3052 perror("malloc failed");
3055 strlcpy(abs_file, basedir, abs_file_size);
3056 strlcat(abs_file, "/", abs_file_size );
3057 strlcat(abs_file, configfile, abs_file_size);
3058 configfile = abs_file;
3060 #endif /* defined unix */
3064 clients->next = NULL;
3068 #elif defined(_WIN32)
3072 /* Prepare mutexes if supported and necessary. */
3073 initialize_mutexes();
3075 random_seed = (unsigned int)time(NULL);
3077 srandom(random_seed);
3080 #endif /* ifdef HAVE_RANDOM */
3083 * Unix signal handling
3085 * Catch the abort, interrupt and terminate signals for a graceful exit
3086 * Catch the hangup signal so the errlog can be reopened.
3087 * Ignore the broken pipe signals (FIXME: Why?)
3089 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3092 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3093 const int ignored_signals[] = { SIGPIPE, 0 };
3095 for (idx = 0; catched_signals[idx] != 0; idx++)
3097 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3098 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3100 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3101 #endif /* ifdef sun */
3103 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3107 for (idx = 0; ignored_signals[idx] != 0; idx++)
3109 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3111 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3116 #else /* ifdef _WIN32 */
3117 # ifdef _WIN_CONSOLE
3119 * We *are* in a windows console app.
3120 * Print a verbose messages about FAQ's and such
3122 printf("%s", win32_blurb);
3123 # endif /* def _WIN_CONSOLE */
3124 #endif /* def _WIN32 */
3127 /* Initialize the CGI subsystem */
3128 cgi_init_error_messages();
3131 * If runnig on unix and without the --nodaemon
3132 * option, become a daemon. I.e. fork, detach
3133 * from tty and get process group leadership
3146 if ( pid < 0 ) /* error */
3151 else if ( pid != 0 ) /* parent */
3156 * must check for errors
3157 * child died due to missing files aso
3160 wpid = waitpid( pid, &status, WNOHANG );
3169 /* Should be more portable, but not as well tested */
3174 #else /* ndef __FreeBSD__ */
3176 #endif /* ndef __FreeBSD__ */
3177 fd = open("/dev/tty", O_RDONLY);
3180 /* no error check here */
3181 ioctl( fd, TIOCNOTTY,0 );
3185 /* FIXME: should close stderr (fd 2) here too, but the test
3187 * and load config file is done in listen_loop() and puts
3188 * some messages on stderr there.
3195 } /* -END- if (!no_daemon) */
3198 * As soon as we have written the PID file, we can switch
3199 * to the user and group ID indicated by the --user option
3205 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3207 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3213 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3215 if (chroot(pw->pw_dir) < 0)
3217 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3221 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3224 if (setuid(pw->pw_uid))
3226 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3230 char putenv_dummy[64];
3232 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3233 if (putenv(putenv_dummy) != 0)
3235 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3238 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3239 if (putenv(putenv_dummy) != 0)
3241 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3247 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3250 #endif /* defined unix */
3253 /* This will be FALSE unless the command line specified --service
3257 /* Yup, so now we must attempt to establish a connection
3258 * with the service dispatcher. This will only work if this
3259 * process was launched by the service control manager to
3260 * actually run as a service. If this isn't the case, i've
3261 * known it take around 30 seconds or so for the call to return.
3264 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3265 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3267 /* Service has run, and at this point is now being stopped, so just return */
3272 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3274 /* An error occurred. Usually it's because --service was wrongly specified
3275 * and we were unable to connect to the Service Control Dispatcher because
3276 * it wasn't expecting us and is therefore not listening.
3278 * For now, just continue below to call the listen_loop function.
3281 #endif /* def _WIN32 */
3291 /*********************************************************************
3293 * Function : bind_port_helper
3295 * Description : Bind the listen port. Handles logging, and aborts
3299 * 1 : config = Privoxy configuration. Specifies port
3302 * Returns : Port that was opened.
3304 *********************************************************************/
3305 static jb_socket bind_port_helper(struct configuration_spec * config)
3310 if ( (config->haddr != NULL)
3311 && (config->haddr[0] == '1')
3312 && (config->haddr[1] == '2')
3313 && (config->haddr[2] == '7')
3314 && (config->haddr[3] == '.') )
3316 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
3319 else if (config->haddr == NULL)
3321 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3326 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3327 config->hport, config->haddr);
3330 result = bind_port(config->haddr, config->hport, &bfd);
3337 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3338 "There may be another Privoxy or some other "
3339 "proxy running on port %d",
3340 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
3341 config->hport, config->hport);
3344 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3345 "The hostname is not resolvable",
3346 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3349 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
3350 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3353 /* shouldn't get here */
3354 return JB_INVALID_SOCKET;
3357 config->need_bind = 0;
3364 /* Without this simple workaround we get this compiler warning from _beginthread
3365 * warning C4028: formal parameter 1 different from declaration
3367 void w32_service_listen_loop(void *p)
3371 #endif /* def _WIN32 */
3374 /*********************************************************************
3376 * Function : listen_loop
3378 * Description : bind the listen port and enter a "FOREVER" listening loop.
3384 *********************************************************************/
3385 static void listen_loop(void)
3387 struct client_state *csp = NULL;
3389 struct configuration_spec * config;
3391 config = load_config();
3393 bfd = bind_port_helper(config);
3395 #ifdef FEATURE_GRACEFUL_TERMINATION
3396 while (!g_terminate)
3401 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
3402 while (waitpid(-1, NULL, WNOHANG) > 0)
3404 /* zombie children */
3406 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
3409 * Free data that was used by died threads
3415 * Re-open the errlog after HUP signal
3417 if (received_hup_signal)
3419 init_error_log(Argv[0], config->logfile, config->debug);
3420 received_hup_signal = 0;
3425 #ifdef FEATURE_COOKIE_JAR
3427 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
3428 * already open. I think unload_configfile() is not being run, which should do
3429 * this work. Until that can get resolved, we'll use this workaround.
3433 if (csp->config->jar)
3435 fclose(csp->config->jar);
3436 csp->config->jar = NULL;
3438 #endif /* FEATURE_COOKIE_JAR */
3439 #endif /* __OS2__ */
3441 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
3443 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
3447 csp->flags |= CSP_FLAG_ACTIVE;
3448 csp->sfd = JB_INVALID_SOCKET;
3450 csp->config = config = load_config();
3452 if ( config->need_bind )
3455 * Since we were listening to the "old port", we will not see
3456 * a "listen" param change until the next IJB request. So, at
3457 * least 1 more request must be made for us to find the new
3458 * setting. I am simply closing the old socket and binding the
3461 * Which-ever is correct, we will serve 1 more page via the
3462 * old settings. This should probably be a "show-proxy-args"
3463 * request. This should not be a so common of an operation
3464 * that this will hurt people's feelings.
3469 bfd = bind_port_helper(config);
3472 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
3474 if (!accept_connection(csp, bfd))
3476 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
3489 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
3492 #ifdef FEATURE_TOGGLE
3493 if (global_toggle_state)
3495 csp->flags |= CSP_FLAG_TOGGLED_ON;
3497 #endif /* def FEATURE_TOGGLE */
3499 if (run_loader(csp))
3501 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
3502 /* Never get here - LOG_LEVEL_FATAL causes program exit */
3506 if (block_acl(NULL,csp))
3508 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
3509 close_socket(csp->cfd);
3513 #endif /* def FEATURE_ACL */
3515 /* add it to the list of clients */
3516 csp->next = clients->next;
3517 clients->next = csp;
3519 if (config->multi_threaded)
3523 /* this is a switch () statment in the C preprocessor - ugh */
3524 #undef SELECTED_ONE_OPTION
3526 /* Use Pthreads in preference to native code */
3527 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
3528 #define SELECTED_ONE_OPTION
3530 pthread_t the_thread;
3531 pthread_attr_t attrs;
3533 pthread_attr_init(&attrs);
3534 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
3535 errno = pthread_create(&the_thread, &attrs,
3536 (void * (*)(void *))serve, csp);
3537 child_id = errno ? -1 : 0;
3538 pthread_attr_destroy(&attrs);
3542 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
3543 #define SELECTED_ONE_OPTION
3544 child_id = _beginthread(
3545 (void (*)(void *))serve,
3550 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
3551 #define SELECTED_ONE_OPTION
3552 child_id = _beginthread(
3553 (void(* _Optlink)(void*))serve,
3559 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
3560 #define SELECTED_ONE_OPTION
3562 thread_id tid = spawn_thread
3563 (server_thread, "server", B_NORMAL_PRIORITY, csp);
3565 if ((tid >= 0) && (resume_thread(tid) == B_OK))
3567 child_id = (int) tid;
3576 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
3577 #define SELECTED_ONE_OPTION
3578 csp->cfd = ReleaseSocket(csp->cfd, -1);
3581 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3582 NP_Output, Output(),
3583 NP_CloseOutput, FALSE,
3584 NP_Name, (ULONG)"privoxy child",
3588 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3589 NP_Output, Output(),
3590 NP_CloseOutput, FALSE,
3591 NP_Name, (ULONG)"privoxy child",
3592 NP_StackSize, 200*1024,
3598 ((struct Task *)child_id)->tc_UserData = csp;
3599 Signal((struct Task *)child_id, SIGF_SINGLE);
3604 #if !defined(SELECTED_ONE_OPTION)
3607 /* This block is only needed when using fork().
3608 * When using threads, the server thread was
3609 * created and run by the call to _beginthread().
3611 if (child_id == 0) /* child */
3614 #ifdef FEATURE_TOGGLE
3615 int inherited_toggle_state = global_toggle_state;
3616 #endif /* def FEATURE_TOGGLE */
3621 * If we've been toggled or we've blocked the request, tell Mom
3624 #ifdef FEATURE_TOGGLE
3625 if (inherited_toggle_state != global_toggle_state)
3627 rc |= RC_FLAG_TOGGLED;
3629 #endif /* def FEATURE_TOGGLE */
3631 #ifdef FEATURE_STATISTICS
3632 if (csp->flags & CSP_FLAG_REJECTED)
3634 rc |= RC_FLAG_BLOCKED;
3636 #endif /* ndef FEATURE_STATISTICS */
3640 else if (child_id > 0) /* parent */
3642 /* in a fork()'d environment, the parent's
3643 * copy of the client socket and the CSP
3647 #if !defined(_WIN32) && !defined(__CYGWIN__)
3649 wait( &child_status );
3652 * Evaluate child's return code: If the child has
3653 * - been toggled, toggle ourselves
3654 * - blocked its request, bump up the stats counter
3657 #ifdef FEATURE_TOGGLE
3658 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
3660 global_toggle_state = !global_toggle_state;
3662 #endif /* def FEATURE_TOGGLE */
3664 #ifdef FEATURE_STATISTICS
3666 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
3670 #endif /* def FEATURE_STATISTICS */
3672 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
3673 close_socket(csp->cfd);
3674 csp->flags &= ~CSP_FLAG_ACTIVE;
3678 #undef SELECTED_ONE_OPTION
3679 /* end of cpp switch () */
3681 if (child_id < 0) /* failed */
3683 char buf[BUFFER_SIZE];
3685 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
3687 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
3689 write_socket(csp->cfd, buf, strlen(buf));
3690 close_socket(csp->cfd);
3691 csp->flags &= ~CSP_FLAG_ACTIVE;
3702 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
3704 /* Clean up. Aim: free all memory (no leaks) */
3705 #ifdef FEATURE_GRACEFUL_TERMINATION
3707 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
3709 unload_current_config_file();
3710 unload_current_actions_file();
3711 unload_current_re_filterfile();
3712 #ifdef FEATURE_TRUST
3713 unload_current_trust_file();
3716 if (config->multi_threaded)
3723 } while ((clients->next != NULL) && (--i > 0));
3727 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
3738 #ifdef FEATURE_COOKIE_JAR
3739 if (NULL != config->jar)
3741 fclose(config->jar);
3745 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
3746 /* Cleanup - remove taskbar icon etc. */
3751 #endif /* FEATURE_GRACEFUL_TERMINATION */