1 const char jcc_rcs[] = "$Id: jcc.c,v 1.128 2007/03/25 16:55:54 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 1.128 2007/03/25 16:55:54 fabiankeil
37 * Don't CLF-log CONNECT requests twice.
39 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
40 * Log the source address for ACL-related connection drops.
42 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
43 * New config option: enforce-blocks.
45 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
46 * - Move null byte check into separate function.
47 * - Don't confuse the client with error pages
48 * if a CONNECT request was already confirmed.
50 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
51 * Speed up NULL byte escaping and only log the complete
52 * NULL byte requests with header debugging enabled.
54 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
55 * Answer requests that contain NULL bytes with
56 * a custom response instead of waiting for more
57 * data until the client eventually hangs up.
59 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
60 * - Move delivery and logging of crunched responses
61 * from chat() into send_crunch_response().
62 * - Display the reason for generating http_responses.
63 * - Log the content length for LOG_LEVEL_CLF correctly
64 * (still incorrect for some fixed responses).
65 * - Reword an incorrect comment about
66 * treat-forbidden-connects-like-blocks violating
68 * - Add some log messages.
70 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
71 * Move mutex initialization into separate
72 * function and exit in case of errors.
74 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
75 * - Start to reduce chat()'s line count and move
76 * parts of it into separate functions.
77 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
79 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
80 * - Add Proxy-Agent header to HTTP snippets that are
81 * supposed to reach HTTP clients only.
82 * - Made a few CONNECT log messages more descriptive.
83 * - Catch completely empty server responses (as seen
84 * with Tor's fake ".noconnect" top level domain).
85 * - Use shiny new "forwarding-failed" template for socks errors.
87 * Revision 1.118 2007/01/07 07:43:43 joergs
88 * AmigaOS4 support added.
90 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
91 * Added config option accept-intercepted-requests
92 * and disabled it by default.
94 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
95 * Reverted parts of my last commit
96 * to keep error handling working.
98 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
99 * Fixed gcc43 conversion warnings.
101 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
102 * Fix -pedantic ISO C warning about converting
103 * from function pointer to object pointer.
105 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
106 * Silence compiler warning I introduced with my last commit.
108 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
109 * Mutex protect rand() if POSIX threading
110 * is used, warn the user if that's not possible
111 * and stop using it on _WIN32 where it could
114 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
115 * Don't prevent core dumps by catching SIGABRT.
116 * It's rude and makes debugging unreasonable painful.
118 * Revision 1.110 2006/12/13 14:52:53 etresoft
119 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
121 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
122 * Privoxy is now able to run as intercepting
123 * proxy in combination with any packet filter
124 * that does the port redirection. The destination
125 * is extracted from the "Host:" header which
126 * should be available for nearly all requests.
128 * Moved HTTP snipplets into jcc.c.
129 * Added error message for gopher proxy requests.
131 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
132 * Only unlink the pidfile if it's actually used.
134 * Change order of interception checks to make
135 * it possible to block or redirect requests for
138 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
139 * Make pthread mutex locking more generic. Instead of
140 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
141 * and use mutex locking unless there is an _r function
142 * available. Better safe than sorry.
144 * Fixes "./configure --disable-pthread" and should result
145 * in less threading-related problems on pthread-using platforms,
146 * but it still doesn't fix BR#1122404.
148 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
149 * Move pthread.h inclusion from jcc.c to jcc.h.
150 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
152 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
153 * Don't exit after receiving the second SIGHUP on Solaris.
155 * Fixes BR 1052235, but the same problem may exist on other
156 * systems. Once 3.0.6 is out we should use sigset()
157 * where available and see if it breaks anything.
159 * Revision 1.104 2006/09/23 13:26:38 roro
160 * Replace TABs by spaces in source code.
162 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
163 * Fix +redirect{}. Didn't work with -fast-redirects.
165 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
166 * Respond with 400 and a short text message
167 * if the client tries to use Privoxy as FTP proxy.
169 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
170 * Make number of retries in case of forwarded-connect problems
171 * a config file option (forwarded-connect-retries) and use 0 as
174 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
175 * Set random(3) seed.
177 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
178 * Follow the OpenBSD port's lead and protect the resolve
179 * functions on OpenBSD as well.
181 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
182 * --user fix. Only use the user as group if no group is specified.
183 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
185 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
186 * Windows service (re-)integration
190 * --install[:service_name]
191 * --uninstall[:service_name]
194 * They work as follows:
195 * --install will create a service for you and then terminate.
196 * By default the service name will be "privoxy" (without the quotes).
197 * However you can run multiple services if you wish, just by adding
198 * a colon and then a name (no spaces).
200 * --uninstall follows the exact same rules a --install.
202 * --service is used when the program is executed by the service
203 * control manager, and in normal circumstances would never be
204 * used as a command line argument.
206 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
207 * Windows service integration
209 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
210 * Incorporate Fabian Keil's patch work:
211 http://www.fabiankeil.de/sourcecode/privoxy/
213 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
214 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
215 * with what was really the latest development (the v_3_0_branch branch)
217 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
218 * Thanks to Jindrich Makovicka for a race condition fix for the log
219 * file. The race condition remains for non-pthread implementations.
220 * Reference patch #1175720.
222 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
223 * Add the ability to check jpeg images for invalid
224 * lengths of comment blocks. Defensive strategy
225 * against the exploit:
226 * Microsoft Security Bulletin MS04-028
227 * Buffer Overrun in JPEG Processing (GDI+) Could
228 * Allow Code Execution (833987)
229 * Enabled with +inspect-jpegs in actions files.
231 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
232 * - Fixed usage info for non-unix platforms
233 * - Fixed small cmdline parsing bug
235 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
236 * Diagnostics: Now preserve the returncode of pthread_create
237 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
239 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
240 * No longer ignore SIGCHLD. Fixes bug #769381
242 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
243 * Close jarfile on graceful exit, remove stray line
245 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
246 * Cosmetics: Killed a warning, a typo and an allocation left at exit
248 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
249 * No longer rely on non-POSIX.1 extensions of getcwd().
252 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
253 * Replaced setenv() by posix-compliant putenv()
254 * Thanks to Neil McCalden (nmcc AT users.sf.net).
256 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
257 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
259 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
260 * Clean-up and extension of improvements for forked mode:
261 * - Child's return code now consists of flags RC_FLAG_*
262 * - Reporting toggle to parent now properly #ifdef'ed
263 * - Children now report blocking to parent. This enables
264 * statistics in forked mode
266 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
267 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
268 * Children now report having been toggled through _exit(17), parents
269 * watch for that code and toggle themselves if found.
271 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
272 * Wrapping all *_r functions (the non-_r versions of them) with
273 * mutex semaphores for OSX. Hopefully this will take care of all
274 * of those pesky crash reports.
276 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
277 * Fixed two mostly harmless mem leaks
279 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
280 * Fix: Head of global clients list now initialized to NULL
282 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
283 * Added basic support for OPTIONS and TRACE HTTP methods:
284 * - New interceptor direct_response() added in chat().
285 * - sed() moved to earlier in the process, so that the
286 * Host: header is evaluated before actions and forwarding
289 * Revision 1.92 2002/05/08 16:00:46 oes
290 * Chat's buffer handling:
291 * - Fixed bug with unchecked out-of-mem conditions
292 * while reading client request & server headers
293 * - No longer predict if the buffer limit will be exceeded
294 * in the next read -- check add_to_iob's new
295 * return code. If buffer couldn't be extended
296 * (policy or out-of-mem) while
297 * - reading from client: abort
298 * - reading server headers: send error page
299 * - buffering server body for filter: flush,
300 * and if that fails: send error page
302 * Revision 1.91 2002/04/08 20:35:58 swa
305 * Revision 1.90 2002/04/02 14:57:28 oes
306 * Made sending wafers independent of FEATURE_COOKIE_JAR
308 * Revision 1.89 2002/03/31 17:18:59 jongfoster
309 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
311 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
312 * More compiler warning message maintenance
314 * Revision 1.87 2002/03/26 22:29:54 swa
315 * we have a new homepage!
317 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
318 * Workaround for closing the jarfile before load_config() comes around again
320 * Revision 1.85 2002/03/24 15:23:33 jongfoster
323 * Revision 1.84 2002/03/24 13:25:43 swa
324 * name change related issues
326 * Revision 1.83 2002/03/16 23:54:06 jongfoster
327 * Adding graceful termination feature, to help look for memory leaks.
328 * If you enable this (which, by design, has to be done by hand
329 * editing config.h) and then go to http://i.j.b/die, then the program
330 * will exit cleanly after the *next* request. It should free all the
331 * memory that was used.
333 * Revision 1.82 2002/03/13 00:27:05 jongfoster
336 * Revision 1.81 2002/03/12 01:42:50 oes
337 * Introduced modular filters
339 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
340 * OS/2 port maintenance:
341 * - Fixed EMX build - it had decayed a little
342 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
343 * substituted a memset for now.
345 * Revision 1.79 2002/03/09 20:03:52 jongfoster
346 * - Making various functions return int rather than size_t.
347 * (Undoing a recent change). Since size_t is unsigned on
348 * Windows, functions like read_socket that return -1 on
349 * error cannot return a size_t.
351 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
352 * crashes, and also frequently caused JB to jump to 100%
353 * CPU and stay there. (Because it thought it had just
354 * read ((unsigned)-1) == 4Gb of data...)
356 * - The signature of write_socket has changed, it now simply
357 * returns success=0/failure=nonzero.
359 * - Trying to get rid of a few warnings --with-debug on
360 * Windows, I've introduced a new type "jb_socket". This is
361 * used for the socket file descriptors. On Windows, this
362 * is SOCKET (a typedef for unsigned). Everywhere else, it's
363 * an int. The error value can't be -1 any more, so it's
364 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
365 * Windows it maps to the #define INVALID_SOCKET.)
367 * - The signature of bind_port has changed.
369 * Revision 1.78 2002/03/08 21:35:04 oes
370 * Added optional group supplement to --user option. Will now use default group of user if no group given
372 * Revision 1.77 2002/03/07 03:52:06 oes
373 * - Fixed compiler warnings etc
374 * - Improved handling of failed DNS lookups
376 * Revision 1.76 2002/03/06 22:54:35 jongfoster
377 * Automated function-comment nitpicking.
379 * Revision 1.75 2002/03/06 10:02:19 oes
380 * Fixed stupid bug when --user was not given
382 * Revision 1.74 2002/03/06 00:49:31 jongfoster
383 * Fixing warning on Windows
384 * Making #ifdefs that refer to the same variable consistently
385 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
387 * Revision 1.73 2002/03/05 23:57:30 hal9
388 * Stray character 's' on line 1618 was breaking build.
390 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
391 * - Re-enable OS/2 building after new parms were added
392 * - Fix false out of memory report when resolving CGI templates when no IP
393 * address is available of failed attempt (a la no such domain)
395 * Revision 1.71 2002/03/05 18:13:56 oes
396 * Added --user option
398 * Revision 1.70 2002/03/05 04:52:42 oes
399 * Deleted non-errlog debugging code
401 * Revision 1.69 2002/03/04 23:50:00 jongfoster
402 * Splitting off bind_port() call into bind_port_helper(), with
405 * Revision 1.68 2002/03/04 20:17:32 oes
408 * Revision 1.67 2002/03/04 18:18:57 oes
409 * - Removed _DEBUG mode
410 * - Cleand up cmdline parsing
411 * - Introduced --no-daemon, --pidfile options
412 * - Cleaned up signal handling:
413 * - Terminate cleanly on INT, TERM and ABRT
414 * - Schedule logfile for re-opening on HUP
415 * - Ignore CHLD and PIPE
416 * - Leave the rest with their default handlers
417 * - Uniform handler registration
418 * - Added usage() function
419 * - Played styleguide police
421 * Revision 1.66 2002/03/03 15:06:55 oes
422 * Re-enabled automatic config reloading
424 * Revision 1.65 2002/03/03 14:49:11 oes
425 * Fixed CLF logging: Now uses client's original HTTP request
427 * Revision 1.64 2002/03/03 09:18:03 joergs
428 * Made jumbjuster work on AmigaOS again.
430 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
431 * Clean up a little CRLF unpleasantness that suddenly appeared
433 * Revision 1.62 2002/02/20 23:17:23 jongfoster
434 * Detecting some out-of memory conditions and exiting with a log message.
436 * Revision 1.61 2002/01/17 21:01:52 jongfoster
437 * Moving all our URL and URL pattern parsing code to urlmatch.c.
439 * Revision 1.60 2001/12/30 14:07:32 steudten
440 * - Add signal handling (unix)
441 * - Add SIGHUP handler (unix)
442 * - Add creation of pidfile (unix)
443 * - Add action 'top' in rc file (RH)
444 * - Add entry 'SIGNALS' to manpage
445 * - Add exit message to logfile (unix)
447 * Revision 1.59 2001/12/13 14:07:18 oes
448 * Fixed Bug: 503 error page now sent OK
450 * Revision 1.58 2001/11/30 23:37:24 jongfoster
451 * Renaming the Win32 config file to config.txt - this is almost the
452 * same as the corresponding UNIX name "config"
454 * Revision 1.57 2001/11/16 00:47:43 jongfoster
455 * Changing the tty-disconnection code to use setsid().
457 * Revision 1.56 2001/11/13 20:20:54 jongfoster
458 * Tabs->spaces, fixing a bug with missing {} around an if()
460 * Revision 1.55 2001/11/13 20:14:53 jongfoster
461 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
463 * Revision 1.54 2001/11/07 00:03:14 steudten
464 * Give reliable return value if an error
465 * occurs not just 0 with new daemon mode.
467 * Revision 1.53 2001/11/05 21:41:43 steudten
468 * Add changes to be a real daemon just for unix os.
469 * (change cwd to /, detach from controlling tty, set
470 * process group and session leader to the own process.
472 * Add some fatal-error log message for failed malloc().
473 * Add '-d' if compiled with 'configure --with-debug' to
474 * enable debug output.
476 * Revision 1.52 2001/10/26 20:11:20 jongfoster
477 * Fixing type mismatch
479 * Revision 1.51 2001/10/26 17:38:28 oes
482 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
483 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
484 * threads to call select() simultaneously. So, it's time to do a real, live,
485 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
486 * (native). Both versions will work, but using __OS2__ offers multi-threading.
488 * Revision 1.49 2001/10/23 21:41:35 jongfoster
489 * Added call to initialize the (statically-allocated of course)
490 * "out of memory" CGI response.
492 * Revision 1.48 2001/10/10 19:56:46 jongfoster
493 * Moving some code that wasn't cookie-related out of an #ifdef
496 * Revision 1.47 2001/10/10 16:44:36 oes
497 * Added CONNECT destination port limitation check
499 * Revision 1.46 2001/10/08 15:17:41 oes
500 * Re-enabled SSL forwarding
502 * Revision 1.45 2001/10/07 15:42:11 oes
503 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
505 * Moved downgrading of the HTTP version from parse_http_request to
506 * chat(), since we can't decide if it is necessary before we have
507 * determined the actions for the URL. The HTTP command is now
508 * *always* re-built so the repairs need no longer be special-cased.
510 * filter_popups now gets a csp pointer so it can raise the new
511 * CSP_FLAG_MODIFIED flag.
515 * Added configurable size limit for the IOB. If the IOB grows so
516 * large that the next read would exceed the limit, the header
517 * is generated, and the header & unfiltered buffer are flushed
518 * to the client. Chat then continues in non-buffering,
519 * non-filtering body mode.
521 * Revision 1.44 2001/10/02 18:13:57 oes
524 * Revision 1.43 2001/10/02 15:32:13 oes
525 * Moved generation of hdr
527 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
528 * Cleaning up 2 compiler warnings on OS/2.
530 * Revision 1.41 2001/09/16 17:05:14 jongfoster
531 * Removing unused #include showarg.h
533 * Revision 1.40 2001/09/16 15:41:45 jongfoster
534 * Fixing signed/unsigned comparison warning.
536 * Revision 1.39 2001/09/16 13:21:27 jongfoster
537 * Changes to use new list functions.
539 * Revision 1.38 2001/09/16 13:01:46 jongfoster
540 * Removing redundant function call that zeroed zalloc()'d memory.
542 * Revision 1.37 2001/09/10 11:12:24 oes
543 * Deleted unused variable
545 * Revision 1.36 2001/09/10 10:56:15 oes
546 * Silenced compiler warnings
548 * Revision 1.35 2001/07/31 14:44:22 oes
549 * Deleted unused size parameter from filter_popups()
551 * Revision 1.34 2001/07/30 22:08:36 jongfoster
552 * Tidying up #defines:
553 * - All feature #defines are now of the form FEATURE_xxx
554 * - Permanently turned off WIN_GUI_EDIT
555 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
557 * Revision 1.33 2001/07/29 19:32:00 jongfoster
558 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
560 * Revision 1.32 2001/07/29 18:47:05 jongfoster
561 * Adding missing #include "loadcfg.h"
563 * Revision 1.31 2001/07/29 12:17:48 oes
564 * Applied pthread fix by Paul Lieverse
566 * Revision 1.30 2001/07/25 22:57:13 jongfoster
567 * __BEOS__ no longer overrides FEATURE_PTHREAD.
568 * This is because FEATURE_PTHREAD will soon be widely used, so I
569 * want to keep it simple.
571 * Revision 1.29 2001/07/24 12:47:06 oes
572 * Applied BeOS support update by Eugenia
574 * Revision 1.28 2001/07/23 13:26:12 oes
575 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
577 * Revision 1.27 2001/07/19 19:09:47 haroon
578 * - Added code to take care of the situation where while processing the first
579 * server response (which includes the server header), after finding the end
580 * of the headers we were not looking past the end of the headers for
581 * content modification. I enabled it for filter_popups.
582 * Someone else should look to see if other similar operations should be
583 * done to the discarded portion of the buffer.
585 * Note 2001/07/20: No, the other content modification mechanisms will process
586 * the whole iob later anyway. --oes
588 * Revision 1.26 2001/07/18 12:31:36 oes
591 * Revision 1.25 2001/07/15 19:43:49 jongfoster
592 * Supports POSIX threads.
593 * Also removed some unused #includes.
595 * Revision 1.24 2001/07/13 14:00:40 oes
596 * - Generic content modification scheme:
597 * Each feature has its own applicability flag that is set
598 * from csp->action->flags.
599 * Replaced the "filtering" int flag , by a function pointer
600 * "content_filter" to the function that will do the content
601 * modification. If it is != NULL, the document will be buffered
602 * and processed through *content_filter, which must set
603 * csp->content_length and return a modified copy of the body
604 * or return NULL (on failiure).
605 * - Changed csp->is_text to the more generic bitmap csp->content_type
606 * which can currently take the valued CT_TEXT or CT_GIF
608 * - Removed all #ifdef PCRS
610 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
611 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
612 * the `block_acl' call. This prevents a compilation error when the user
613 * does not wish to use the "ACL" feature.
615 * Revision 1.22 2001/06/29 21:45:41 oes
616 * Indentation, CRLF->LF, Tab-> Space
618 * Revision 1.21 2001/06/29 13:29:36 oes
619 * - Cleaned up, improved comments
620 * - Unified all possible interceptors (CGI,
621 * block, trust, fast_redirect) in one
622 * place, with one (CGI) answer generation
623 * mechansim. Much clearer now.
624 * - Removed the GIF image generation, which
625 * is now done in filters.c:block_url()
626 * - Made error conditions like domain lookup
627 * failiure or (various) problems while talking
628 * to the server use cgi.c:error_response()
629 * instead of generating HTML/HTTP in chat() (yuck!)
630 * - Removed logentry from cancelled commit
632 * Revision 1.20 2001/06/09 10:55:28 jongfoster
633 * Changing BUFSIZ ==> BUFFER_SIZE
635 * Revision 1.19 2001/06/07 23:12:52 jongfoster
636 * Replacing function pointer in struct gateway with a directly
637 * called function forwarded_connect().
638 * Replacing struct gateway with struct forward_spec
640 * Revision 1.18 2001/06/03 19:12:16 oes
641 * introduced new cgi handling
643 * Revision 1.17 2001/06/01 20:07:23 jongfoster
644 * Now uses action +image-blocker{} rather than config->tinygif
646 * Revision 1.16 2001/06/01 18:49:17 jongfoster
647 * Replaced "list_share" with "list" - the tiny memory gain was not
648 * worth the extra complexity.
650 * Revision 1.15 2001/05/31 21:24:47 jongfoster
651 * Changed "permission" to "action" throughout.
652 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
653 * Moved vanilla wafer check into chat(), since we must now
654 * decide whether or not to add it based on the URL.
656 * Revision 1.14 2001/05/29 20:14:01 joergs
657 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
660 * Revision 1.13 2001/05/29 09:50:24 jongfoster
661 * Unified blocklist/imagelist/permissionslist.
662 * File format is still under discussion, but the internal changes
665 * Also modified interceptor behaviour:
666 * - We now intercept all URLs beginning with one of the following
667 * prefixes (and *only* these prefixes):
669 * * http://ijbswa.sf.net/config/
670 * * http://ijbswa.sourceforge.net/config/
671 * - New interceptors "home page" - go to http://i.j.b/ to see it.
672 * - Internal changes so that intercepted and fast redirect pages
673 * are not replaced with an image.
674 * - Interceptors now have the option to send a binary page direct
675 * to the client. (i.e. ijb-send-banner uses this)
676 * - Implemented show-url-info interceptor. (Which is why I needed
677 * the above interceptors changes - a typical URL is
678 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
679 * The previous mechanism would not have intercepted that, and
680 * if it had been intercepted then it then it would have replaced
683 * Revision 1.12 2001/05/27 22:17:04 oes
685 * - re_process_buffer no longer writes the modified buffer
686 * to the client, which was very ugly. It now returns the
687 * buffer, which it is then written by chat.
689 * - content_length now adjusts the Content-Length: header
690 * for modified documents rather than crunch()ing it.
691 * (Length info in csp->content_length, which is 0 for
692 * unmodified documents)
694 * - For this to work, sed() is called twice when filtering.
696 * Revision 1.11 2001/05/26 17:27:53 jongfoster
697 * Added support for CLF and fixed LOG_LEVEL_LOG.
698 * Also did CRLF->LF fix of my previous patch.
700 * Revision 1.10 2001/05/26 15:26:15 jongfoster
701 * ACL feature now provides more security by immediately dropping
702 * connections from untrusted hosts.
704 * Revision 1.9 2001/05/26 00:28:36 jongfoster
705 * Automatic reloading of config file.
706 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
707 * Most of the global variables have been moved to a new
708 * struct configuration_spec, accessed through csp->config->globalname
709 * Most of the globals remaining are used by the Win32 GUI.
711 * Revision 1.8 2001/05/25 22:43:18 jongfoster
712 * Fixing minor memory leak and buffer overflow.
714 * Revision 1.7 2001/05/25 22:34:30 jongfoster
717 * Revision 1.6 2001/05/23 00:13:58 joergs
718 * AmigaOS support fixed.
720 * Revision 1.5 2001/05/22 18:46:04 oes
722 * - Enabled filtering banners by size rather than URL
723 * by adding patterns that replace all standard banner
724 * sizes with the "Junkbuster" gif to the re_filterfile
726 * - Enabled filtering WebBugs by providing a pattern
727 * which kills all 1x1 images
729 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
730 * which is selected by the (nonstandard and therefore
731 * capital) letter 'U' in the option string.
732 * It causes the quantifiers to be ungreedy by default.
733 * Appending a ? turns back to greedy (!).
735 * - Added a new interceptor ijb-send-banner, which
736 * sends back the "Junkbuster" gif. Without imagelist or
737 * MSIE detection support, or if tinygif = 1, or the
738 * URL isn't recognized as an imageurl, a lame HTML
739 * explanation is sent instead.
741 * - Added new feature, which permits blocking remote
742 * script redirects and firing back a local redirect
744 * The feature is conditionally compiled, i.e. it
745 * can be disabled with --disable-fast-redirects,
746 * plus it must be activated by a "fast-redirects"
747 * line in the config file, has its own log level
748 * and of course wants to be displayed by show-proxy-args
749 * Note: Boy, all the #ifdefs in 1001 locations and
750 * all the fumbling with configure.in and acconfig.h
751 * were *way* more work than the feature itself :-(
753 * - Because a generic redirect template was needed for
754 * this, tinygif = 3 now uses the same.
756 * - Moved GIFs, and other static HTTP response templates
761 * - Removed some >400 CRs again (Jon, you really worked
764 * Revision 1.4 2001/05/21 19:34:01 jongfoster
765 * Made failure to bind() a fatal error.
767 * Revision 1.3 2001/05/20 01:21:20 jongfoster
768 * Version 2.9.4 checkin.
769 * - Merged popupfile and cookiefile, and added control over PCRS
770 * filtering, in new "permissionsfile".
771 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
772 * file error you now get a message box (in the Win32 GUI) rather
773 * than the program exiting with no explanation.
774 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
776 * - Removed tabs from "config"
777 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
778 * - Bumped up version number.
780 * Revision 1.2 2001/05/17 22:34:44 oes
781 * - Added hint on GIF char array generation to jcc.c
782 * - Cleaned CRLF's from the sources and related files
783 * - Repaired logging for REF and FRC
785 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
786 * Initial import of version 2.9.3 source tree
789 *********************************************************************/
795 #include <sys/types.h>
804 # ifndef FEATURE_PTHREAD
808 # include <windows.h>
809 # include <process.h>
810 # endif /* ndef FEATURE_PTHREAD */
813 # ifndef _WIN_CONSOLE
815 # endif /* ndef _WIN_CONSOLE */
816 # include "w32svrapi.h"
818 #else /* ifndef _WIN32 */
820 # if !defined (__OS2__)
822 # include <sys/wait.h>
823 # endif /* ndef __OS2__ */
824 # include <sys/time.h>
825 # include <sys/stat.h>
826 # include <sys/ioctl.h>
829 #include <sys/termios.h>
840 # include <socket.h> /* BeOS has select() for sockets only. */
841 # include <OS.h> /* declarations for threads and stuff. */
844 # if defined(__EMX__) || defined(__OS2__)
845 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
850 #define bzero(B,N) memset(B,0x00,n)
865 #include "killpopup.h"
866 #include "miscutil.h"
868 #include "jbsockets.h"
873 #include "urlmatch.h"
875 const char jcc_h_rcs[] = JCC_H_VERSION;
876 const char project_h_rcs[] = PROJECT_H_VERSION;
879 struct client_state clients[1];
880 struct file_list files[1];
882 #ifdef FEATURE_STATISTICS
883 int urls_read = 0; /* total nr of urls read inc rejected */
884 int urls_rejected = 0; /* total nr of urls rejected */
885 #endif /* def FEATURE_STATISTICS */
887 #ifdef FEATURE_GRACEFUL_TERMINATION
891 static void listen_loop(void);
892 static void chat(struct client_state *csp);
894 void serve(struct client_state *csp);
895 #else /* ifndef AMIGA */
896 static void serve(struct client_state *csp);
897 #endif /* def AMIGA */
900 static int32 server_thread(void *data);
901 #endif /* def __BEOS__ */
904 #define sleep(N) Sleep(((N) * 1000))
908 #define sleep(N) DosSleep(((N) * 100))
911 #ifdef FEATURE_PTHREAD
912 pthread_mutex_t log_mutex;
913 pthread_mutex_t log_init_mutex;
915 #ifndef HAVE_GMTIME_R
916 pthread_mutex_t gmtime_mutex;
917 #endif /* ndef HAVE_GMTIME_R */
919 #ifndef HAVE_LOCALTIME_R
920 pthread_mutex_t localtime_mutex;
921 #endif /* ndef HAVE_GMTIME_R */
923 #ifndef HAVE_GETHOSTBYADDR_R
924 pthread_mutex_t gethostbyaddr_mutex;
925 #endif /* ndef HAVE_GETHOSTBYADDR_R */
927 #ifndef HAVE_GETHOSTBYNAME_R
928 pthread_mutex_t gethostbyname_mutex;
929 #endif /* ndef HAVE_GETHOSTBYNAME_R */
932 pthread_mutex_t rand_mutex;
933 #endif /* ndef HAVE_RANDOM */
935 #endif /* FEATURE_PTHREAD */
937 #if defined(unix) || defined(__EMX__)
938 const char *basedir = NULL;
939 const char *pidfile = NULL;
940 int received_hup_signal = 0;
941 #endif /* defined unix */
943 /* The vanilla wafer. */
944 static const char VANILLA_WAFER[] =
945 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
946 "Do_not_send_me_any_copyrighted_information_other_than_the_"
947 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
948 "In_particular_do_not_send_me_any_cookies_that_"
949 "are_subject_to_a_claim_of_copyright_by_anybody._"
950 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
951 "(copyright_or_otherwise)_applying_to_any_cookie._";
953 /* HTTP snipplets. */
954 const char CSUCCEED[] =
955 "HTTP/1.0 200 Connection established\n"
956 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
958 const char CHEADER[] =
959 "HTTP/1.0 400 Invalid header received from browser\r\n"
960 "Connection: close\r\n\r\n"
961 "Invalid header received from browser.\r\n";
963 const char CFORBIDDEN[] =
964 "HTTP/1.0 403 Connection not allowable\r\n"
965 "Proxy-Agent: Privoxy " VERSION "\r\n"
966 "X-Hint: If you read this message interactively, then you know why this happens ,-)\r\n"
967 "Connection: close\r\n\r\n";
969 const char FTP_RESPONSE[] =
970 "HTTP/1.0 400 Invalid request received from browser\r\n"
971 "Connection: close\r\n\r\n"
972 "Invalid request. Privoxy doesn't support FTP.\r\n";
974 const char GOPHER_RESPONSE[] =
975 "HTTP/1.0 400 Invalid request received from browser\r\n"
976 "Connection: close\r\n\r\n"
977 "Invalid request. Privoxy doesn't support gopher.\r\n";
979 /* XXX: should be a template */
980 const char MISSING_DESTINATION_RESPONSE[] =
981 "HTTP/1.0 400 Bad request received from browser\r\n"
982 "Proxy-Agent: Privoxy " VERSION "\r\n"
983 "Connection: close\r\n\r\n"
984 "Bad request. Privoxy was unable to extract the destination.\r\n";
986 /* XXX: should be a template */
987 const char NO_SERVER_DATA_RESPONSE[] =
988 "HTTP/1.0 502 Server or forwarder response empty\r\n"
989 "Proxy-Agent: Privoxy " VERSION "\r\n"
990 "Connection: close\r\n\r\n"
991 "Empty server or forwarder response.\r\n"
992 "The connection was closed without sending any data.\r\n";
994 /* XXX: should be a template */
995 const char NULL_BYTE_RESPONSE[] =
996 "HTTP/1.0 400 Bad request received from browser\r\n"
997 "Proxy-Agent: Privoxy " VERSION "\r\n"
998 "Connection: close\r\n\r\n"
999 "Bad request. Null byte(s) before end of request.\r\n";
1001 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1002 /*********************************************************************
1004 * Function : sig_handler
1006 * Description : Signal handler for different signals.
1007 * Exit gracefully on TERM and INT
1008 * or set a flag that will cause the errlog
1009 * to be reopened by the main thread on HUP.
1012 * 1 : the_signal = the signal cause this function to call
1016 *********************************************************************/
1017 static void sig_handler(int the_signal)
1023 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1034 received_hup_signal = 1;
1039 * We shouldn't be here, unless we catch signals
1040 * in main() that we can't handle here!
1042 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1050 /*********************************************************************
1052 * Function : client_protocol_is_unsupported
1054 * Description : Checks if the client used a known unsupported
1055 * protocol and deals with it by sending an error
1059 * 1 : csp = Current client state (buffers, headers, etc...)
1060 * 2 : req = the first request line send by the client
1062 * Returns : TRUE if an error response has been generated, or
1063 * FALSE if the request doesn't look invalid.
1065 *********************************************************************/
1066 int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1068 char buf[BUFFER_SIZE];
1071 * If it's a FTP or gopher request, we don't support it.
1073 * These checks are better than nothing, but they might
1074 * not work in all configurations and some clients might
1075 * have problems digesting the answer.
1077 * They should, however, never cause more problems than
1078 * Privoxy's old behaviour (returning the misleading HTML
1081 * "Could not resolve http://(ftp|gopher)://example.org").
1083 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1085 if (!strncmpic(req, "GET ftp://", 10))
1087 strcpy(buf, FTP_RESPONSE);
1088 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as FTP proxy: %s",
1089 csp->ip_addr_str, req);
1093 strcpy(buf, GOPHER_RESPONSE);
1094 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as gopher proxy: %s",
1095 csp->ip_addr_str, req);
1097 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1099 write_socket(csp->cfd, buf, strlen(buf));
1108 /*********************************************************************
1110 * Function : get_request_destination_elsewhere
1112 * Description : If the client's request was redirected into
1113 * Privoxy without the client's knowledge,
1114 * the request line lacks the destination host.
1116 * This function tries to get it elsewhere,
1117 * provided accept-intercepted-requests is enabled.
1119 * "Elsewhere" currently only means "Host: header",
1120 * but in the future we may ask the redirecting
1121 * packet filter to look the destination up.
1123 * If the destination stays unknown, an error
1124 * response is send to the client and headers
1125 * are freed so that chat() can return directly.
1128 * 1 : csp = Current client state (buffers, headers, etc...)
1129 * 2 : headers = a header list
1131 * Returns : JB_ERR_OK if the destination is now known, or
1132 * JB_ERR_PARSE if it isn't.
1134 *********************************************************************/
1135 jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1137 char buf[BUFFER_SIZE];
1140 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1142 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1143 " Privoxy isn't configured to accept intercepted requests.",
1144 csp->ip_addr_str, csp->http->cmd);
1145 /* XXX: Use correct size */
1146 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1147 csp->ip_addr_str, csp->http->cmd);
1149 strcpy(buf, CHEADER);
1150 write_socket(csp->cfd, buf, strlen(buf));
1151 destroy_list(headers);
1153 return JB_ERR_PARSE;
1155 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1157 /* Split the domain we just got for pattern matching */
1158 init_domain_components(csp->http);
1164 /* We can't work without destination. Go spread the news.*/
1166 req = list_to_text(headers);
1168 /* XXX: Use correct size */
1169 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1170 csp->ip_addr_str, csp->http->cmd);
1171 log_error(LOG_LEVEL_ERROR,
1172 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1173 csp->ip_addr_str, csp->http->cmd, req);
1176 strcpy(buf, MISSING_DESTINATION_RESPONSE);
1177 write_socket(csp->cfd, buf, strlen(buf));
1178 destroy_list(headers);
1180 return JB_ERR_PARSE;
1183 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1184 * to get the destination IP address, use it as host directly
1185 * or do a reverse DNS lookup first.
1190 /*********************************************************************
1192 * Function : get_server_headers
1194 * Description : Parses server headers in iob and fills them
1195 * into csp->headers so that they can later be
1199 * 1 : csp = Current client state (buffers, headers, etc...)
1201 * Returns : JB_ERR_OK if everything went fine, or
1202 * JB_ERR_PARSE if the headers were incomplete.
1204 *********************************************************************/
1205 jb_err get_server_headers(struct client_state *csp)
1207 int continue_hack_in_da_house = 0;
1210 while (((header = get_header(csp)) != NULL) || continue_hack_in_da_house)
1215 * continue hack in da house. Ignore the ending of
1216 * this head and continue enlisting header lines.
1217 * The reason is described below.
1219 enlist(csp->headers, "");
1220 continue_hack_in_da_house = 0;
1223 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1226 * It's a bodyless continue response, don't
1227 * stop header parsing after reaching it's end.
1229 * As a result Privoxy will concatenate the
1230 * next response's head and parse and deliver
1231 * the headers as if they belonged to one request.
1233 * The client will separate them because of the
1234 * empty line between them.
1236 * XXX: What we're doing here is clearly against
1237 * the intended purpose of the continue header,
1238 * and under some conditions (HTTP/1.0 client request)
1239 * it's a standard violation.
1241 * Anyway, "sort of against the spec" is preferable
1242 * to "always getting confused by Continue responses"
1243 * (Privoxy's behaviour before this hack was added)
1245 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1246 continue_hack_in_da_house = 1;
1248 else if (*header == '\0')
1251 * If the header is empty, but the Continue hack
1252 * isn't active, we can assume that we reached the
1253 * end of the buffer before we hit the end of the
1256 * Inform the caller an let it decide how to handle it.
1258 return JB_ERR_PARSE;
1262 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1265 * XXX: Should we quit the request and return a
1266 * out of memory error page instead?
1268 log_error(LOG_LEVEL_ERROR,
1269 "Out of memory while enlisting server headers. %s lost.",
1279 /*********************************************************************
1281 * Function : crunch_reason
1283 * Description : Translates the crunch reason code into a string.
1286 * 1 : rsp = a http_response
1288 * Returns : A string with the crunch reason or an error description.
1290 *********************************************************************/
1291 const char *crunch_reason(const struct http_response *rsp)
1293 char * reason = NULL;
1295 assert(rsp != NULL);
1298 return "Internal error while searching for crunch reason";
1301 switch (rsp->reason)
1303 case RSP_REASON_UNSUPPORTED:
1304 reason = "Unsupported HTTP feature";
1306 case RSP_REASON_BLOCKED:
1309 case RSP_REASON_UNTRUSTED:
1310 reason = "Untrusted";
1312 case RSP_REASON_REDIRECTED:
1313 reason = "Redirected";
1315 case RSP_REASON_CGI_CALL:
1316 reason = "CGI Call";
1318 case RSP_REASON_NO_SUCH_DOMAIN:
1319 reason = "DNS failure";
1321 case RSP_REASON_FORWARDING_FAILED:
1322 reason = "Forwarding failed";
1324 case RSP_REASON_CONNECT_FAILED:
1325 reason = "Connection failure";
1327 case RSP_REASON_OUT_OF_MEMORY:
1328 reason = "Out of memory (may mask other reasons)";
1331 reason = "No reason recorded";
1339 /*********************************************************************
1341 * Function : send_crunch_response
1343 * Description : Delivers already prepared response for
1344 * intercepted requests, logs the interception
1345 * and frees the response.
1348 * 1 : csp = Current client state (buffers, headers, etc...)
1349 * 1 : rsp = Fully prepared response. Will be freed on exit.
1351 * Returns : Nothing.
1353 *********************************************************************/
1354 void send_crunch_response(struct client_state *csp, struct http_response *rsp)
1356 const struct http_request *http = csp->http;
1357 char status_code[4];
1359 assert(rsp != NULL);
1360 assert(rsp->head != NULL);
1365 * Not supposed to happen. If it does
1366 * anyway, treat it as an unknown error.
1368 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1369 /* return code doesn't matter */
1374 /* If rsp is still NULL, we have serious internal problems. */
1375 log_error(LOG_LEVEL_FATAL,
1376 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1380 * Extract the status code from the actual head
1381 * that was send to the client. It is the only
1382 * way to get it right for all requests, including
1383 * the fixed ones for out-of-memory problems.
1385 * A head starts like this: 'HTTP/1.1 200...'
1389 status_code[0] = rsp->head[9];
1390 status_code[1] = rsp->head[10];
1391 status_code[2] = rsp->head[11];
1392 status_code[3] = '\0';
1394 /* Write the answer to the client */
1395 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1396 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1398 /* There is nothing we can do about it. */
1399 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1402 /* Log that the request was crunched and why. */
1403 log_error(LOG_LEVEL_GPC, "%s%s crunch! (%s)",
1404 http->hostport, http->path, crunch_reason(rsp));
1405 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %d",
1406 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1408 /* Clean up and return */
1409 if (cgi_error_memory() != rsp)
1411 free_http_response(rsp);
1417 /*********************************************************************
1419 * Function : request_contains_null_bytes
1421 * Description : Checks for NULL bytes in the request and sends
1422 * an error message to the client if any were found.
1425 * 1 : csp = Current client state (buffers, headers, etc...)
1426 * 2 : buf = Data from the client's request to check.
1427 * 3 : len = The data length.
1429 * Returns : TRUE if the request contained one or more NULL bytes, or
1432 *********************************************************************/
1433 int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1435 size_t c_len; /* Request lenght when treated as C string */
1437 c_len = strlen(buf);
1442 * Null byte(s) found. Log the request,
1443 * return an error response and hang up.
1445 size_t tmp_len = c_len;
1450 * Replace NULL byte(s) with '°' characters
1451 * so the request can be logged as string.
1452 * XXX: Is there a better replacement character?
1455 tmp_len += strlen(buf+tmp_len);
1456 } while (tmp_len < len);
1458 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1459 "(length=%d, strlen=%d).", csp->ip_addr_str, len, c_len);
1460 log_error(LOG_LEVEL_HEADER,
1461 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1463 strcpy(buf, NULL_BYTE_RESPONSE);
1464 write_socket(csp->cfd, buf, strlen(buf));
1466 /* XXX: Log correct size */
1467 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1476 /*********************************************************************
1480 * Description : Once a connection to the client has been accepted,
1481 * this function is called (via serve()) to handle the
1482 * main business of the communication. When this
1483 * function returns, the caller must close the client
1486 * FIXME: chat is nearly thousand lines long.
1490 * 1 : csp = Current client state (buffers, headers, etc...)
1492 * Returns : On success, the number of bytes written are returned (zero
1493 * indicates nothing was written). On error, -1 is returned,
1494 * and errno is set appropriately. If count is zero and the
1495 * file descriptor refers to a regular file, 0 will be
1496 * returned without causing any other effect. For a special
1497 * file, the results are not portable.
1499 *********************************************************************/
1500 static void chat(struct client_state *csp)
1503 * This next lines are a little ugly, but they simplifies the if statements
1504 * below. Basically if TOGGLE, then we want the if to test if the
1505 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
1506 * then we want the if to test for CSP_FLAG_FORCED , else we don't
1508 #ifdef FEATURE_TOGGLE
1509 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
1510 #else /* ifndef FEATURE_TOGGLE */
1511 # define IS_TOGGLED_ON_AND
1512 #endif /* ndef FEATURE_TOGGLE */
1513 #ifdef FEATURE_FORCE_LOAD
1514 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
1515 #else /* ifndef FEATURE_FORCE_LOAD */
1516 # define IS_NOT_FORCED_AND
1517 #endif /* def FEATURE_FORCE_LOAD */
1519 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
1521 char buf[BUFFER_SIZE];
1529 int ms_iis5_hack = 0;
1530 size_t byte_count = 0;
1531 int forwarded_connect_retries = 0;
1532 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
1533 const struct forward_spec * fwd;
1534 struct http_request *http;
1535 int len; /* for buffer sizes (and negative error codes) */
1536 #ifdef FEATURE_KILL_POPUPS
1537 int block_popups; /* bool, 1==will block popups */
1538 int block_popups_now = 0; /* bool, 1==currently blocking popups */
1539 #endif /* def FEATURE_KILL_POPUPS */
1541 int pcrs_filter; /* bool, 1==will filter through pcrs */
1542 int gif_deanimate; /* bool, 1==will deanimate gifs */
1543 int jpeg_inspect; /* bool, 1==will inspect jpegs */
1545 /* Function that does the content filtering for the current request */
1546 char *(*content_filter)() = NULL;
1548 /* Skeleton for HTTP response, if we should intercept the request */
1549 struct http_response *rsp;
1551 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1552 struct list header_list;
1553 struct list *headers = &header_list;
1557 memset(buf, 0, sizeof(buf));
1560 * Read the client's request. Note that since we're not using select() we
1561 * could get blocked here if a client connected, then didn't say anything!
1566 len = read_socket(csp->cfd, buf, sizeof(buf)-1);
1568 if (len <= 0) break; /* error! */
1570 if (request_contains_null_bytes(csp, buf, len))
1572 /* NULL bytes found and dealt with, just hang up. */
1577 * If there is no memory left for buffering the
1578 * request, there is nothing we can do but hang up
1580 if (add_to_iob(csp, buf, len))
1585 req = get_header(csp);
1589 break; /* no HTTP request! */
1594 continue; /* more to come! */
1597 /* Does the request line look invalid? */
1598 if (client_protocol_is_unsupported(csp, req))
1601 * Yes. The request has already been
1602 * answered with a error response, the buffers
1603 * were freed and we're done with chatting.
1608 #ifdef FEATURE_FORCE_LOAD
1610 * If this request contains the FORCE_PREFIX and blocks
1611 * aren't enforced, get rid of it and set the force flag.
1613 if (strstr(req, FORCE_PREFIX))
1615 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
1617 log_error(LOG_LEVEL_FORCE,
1618 "Ignored force prefix in request: \"%s\".", req);
1622 strclean(req, FORCE_PREFIX);
1623 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
1624 csp->flags |= CSP_FLAG_FORCED;
1628 #endif /* def FEATURE_FORCE_LOAD */
1630 switch( parse_http_request(req, http, csp) )
1633 log_error(LOG_LEVEL_ERROR, "Out of memory while parsing request.");
1636 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", req);
1644 if (http->cmd == NULL)
1646 strcpy(buf, CHEADER);
1647 write_socket(csp->cfd, buf, strlen(buf));
1648 /* XXX: Use correct size */
1649 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1650 log_error(LOG_LEVEL_ERROR, "Invalid header received from %s.", csp->ip_addr_str);
1652 free_http_request(http);
1656 /* grab the rest of the client's headers */
1660 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1662 len = read_socket(csp->cfd, buf, sizeof(buf));
1665 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1670 * If there is no memory left for buffering the
1671 * request, there is nothing we can do but hang up
1673 if (add_to_iob(csp, buf, len))
1680 if (p == NULL) break;
1687 if (http->host == NULL)
1690 * If we still don't know the request destination,
1691 * the request is invalid or the client uses
1692 * Privoxy without it's knowledge.
1694 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
1697 * Our attempts to get the request destination
1698 * elsewhere failed or Privoxy is configured
1699 * to only accept proxy requests.
1701 * An error response has already been send
1702 * and we're done here.
1708 /* decide how to route the HTTP request */
1710 if ((fwd = forward_url(http, csp)) == NULL)
1712 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1713 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1716 /* build the http request to send to the server
1717 * we have to do one of the following:
1719 * create = use the original HTTP request to create a new
1720 * HTTP request that has either the path component
1721 * without the http://domainspec (w/path) or the
1722 * full orininal URL (w/url)
1723 * Note that the path and/or the HTTP version may
1724 * have been altered by now.
1726 * connect = Open a socket to the host:port of the server
1727 * and short-circuit server and client socket.
1729 * pass = Pass the request unchanged if forwarding a CONNECT
1730 * request to a parent proxy. Note that we'll be sending
1731 * the CFAIL message ourselves if connecting to the parent
1732 * fails, but we won't send a CSUCCEED message if it works,
1733 * since that would result in a double message (ours and the
1734 * parent's). After sending the request to the parent, we simply
1737 * here's the matrix:
1740 * +--------+--------+
1742 * 0 | create | connect|
1744 * Forwarding +--------+--------+
1746 * 1 | create | pass |
1748 * +--------+--------+
1753 * Determine the actions for this URL
1755 #ifdef FEATURE_TOGGLE
1756 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1758 /* Most compatible set of actions (i.e. none) */
1759 init_current_action(csp->action);
1762 #endif /* ndef FEATURE_TOGGLE */
1764 url_actions(http, csp);
1769 * Check if a CONNECT request is allowable:
1770 * In the absence of a +limit-connect action, allow only port 443.
1771 * If there is an action, allow whatever matches the specificaton.
1775 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
1776 || (csp->action->flags & ACTION_LIMIT_CONNECT
1777 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
1779 if (csp->action->flags & ACTION_TREAT_FORBIDDEN_CONNECTS_LIKE_BLOCKS)
1782 * The response may confuse some clients,
1783 * but makes unblocking easier.
1785 log_error(LOG_LEVEL_ERROR, "Marking suspicious CONNECT request from %s for blocking.",
1787 csp->action->flags |= ACTION_BLOCK;
1792 strcpy(buf, CFORBIDDEN);
1793 write_socket(csp->cfd, buf, strlen(buf));
1794 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
1795 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
1803 * Downgrade http version from 1.1 to 1.0 if +downgrade
1806 if ( (http->ssl == 0)
1807 && (!strcmpic(http->ver, "HTTP/1.1"))
1808 && (csp->action->flags & ACTION_DOWNGRADE))
1811 http->ver = strdup("HTTP/1.0");
1813 if (http->ver == NULL)
1815 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1820 * Save a copy of the original request for logging
1822 http->ocmd = strdup(http->cmd);
1824 if (http->ocmd == NULL)
1826 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
1830 * (Re)build the HTTP request for non-SSL requests.
1831 * If forwarding, use the whole URL, else, use only the path.
1837 http->cmd = strdup(http->gpc);
1838 string_append(&http->cmd, " ");
1840 if (fwd->forward_host)
1842 string_append(&http->cmd, http->url);
1846 string_append(&http->cmd, http->path);
1848 string_append(&http->cmd, " ");
1849 string_append(&http->cmd, http->ver);
1851 if (http->cmd == NULL)
1853 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1855 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", http->cmd);
1857 enlist(csp->headers, http->cmd);
1859 /* Append the previously read headers */
1860 list_append_list_unique(csp->headers, headers);
1861 destroy_list(headers);
1864 * If the user has not supplied any wafers, and the user has not
1865 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1867 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1868 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1870 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1873 hdr = sed(client_patterns, add_client_headers, csp);
1876 /* FIXME Should handle error properly */
1877 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1879 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
1881 #ifdef FEATURE_KILL_POPUPS
1882 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
1883 #endif /* def FEATURE_KILL_POPUPS */
1885 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
1886 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
1888 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
1890 jpeg_inspect = ((csp->action->flags & ACTION_JPEG_INSPECT) != 0);
1893 * We have a request. Now, check to see if we need to
1894 * intercept it, i.e. If ..
1898 /* We may not forward the request by rfc2616 sect 14.31 */
1899 (NULL != (rsp = direct_response(csp)))
1901 /* or we are enabled and... */
1902 || (IS_ENABLED_AND (
1904 /* ..the request was blocked */
1905 ( NULL != (rsp = block_url(csp)))
1907 /* ..or untrusted */
1908 #ifdef FEATURE_TRUST
1909 || ( NULL != (rsp = trust_url(csp)))
1910 #endif /* def FEATURE_TRUST */
1912 /* ..or a redirect kicked in */
1913 || ( NULL != (rsp = redirect_url(csp)))
1917 * .. or a CGI call was detected and answered.
1919 * This check comes last to give the user the power
1920 * to deny acces to some (or all) of the cgi pages.
1922 || (NULL != (rsp = dispatch_cgi(csp)))
1927 * Deliver, log and free the interception
1928 * response. Afterwards we're done here.
1930 send_crunch_response(csp, rsp);
1931 #ifdef FEATURE_STATISTICS
1932 /* Count as a rejected request */
1933 csp->flags |= CSP_FLAG_REJECTED;
1934 #endif /* def FEATURE_STATISTICS */
1937 list_remove_all(csp->headers);
1942 list_remove_all(csp->headers);
1944 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1946 if (fwd->forward_host)
1948 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1949 fwd->forward_host, fwd->forward_port, http->hostport);
1953 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1956 /* here we connect to the server, gateway, or the forwarder */
1958 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
1959 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
1961 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
1962 forwarded_connect_retries, http->hostport);
1965 if (csp->sfd == JB_INVALID_SOCKET)
1967 if (fwd->type != SOCKS_NONE)
1970 rsp = error_response(csp, "forwarding-failed", errno);
1972 else if (errno == EINVAL)
1974 rsp = error_response(csp, "no-such-domain", errno);
1978 rsp = error_response(csp, "connect-failed", errno);
1979 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1984 /* Write the answer to the client */
1987 send_crunch_response(csp, rsp);
1994 if (fwd->forward_host || (http->ssl == 0))
1996 /* write the client's (modified) header to the server
1997 * (along with anything else that may be in the buffer)
2000 if (write_socket(csp->sfd, hdr, strlen(hdr))
2001 || (flush_socket(csp->sfd, csp) < 0))
2003 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
2006 rsp = error_response(csp, "connect-failed", errno);
2010 send_crunch_response(csp, rsp);
2020 * We're running an SSL tunnel and we're not forwarding,
2021 * so just send the "connect succeeded" message to the
2022 * client, flush the rest, and get out of the way.
2024 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
2032 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2034 /* we're finished with the client's header */
2037 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
2039 /* pass data between the client and server
2040 * until one or the other shuts down the connection.
2049 * FD_ZERO here seems to point to an errant macro which crashes.
2050 * So do this by hand for now...
2052 memset(&rfds,0x00,sizeof(fd_set));
2056 FD_SET(csp->cfd, &rfds);
2057 FD_SET(csp->sfd, &rfds);
2059 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
2063 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2067 /* this is the body of the browser's request
2068 * just read it and write it.
2071 if (FD_ISSET(csp->cfd, &rfds))
2073 len = read_socket(csp->cfd, buf, sizeof(buf));
2077 break; /* "game over, man" */
2080 if (write_socket(csp->sfd, buf, (size_t)len))
2082 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2089 * The server wants to talk. It could be the header or the body.
2090 * If `hdr' is null, then it's the header otherwise it's the body.
2091 * FIXME: Does `hdr' really mean `host'? No.
2095 if (FD_ISSET(csp->sfd, &rfds))
2098 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2102 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2104 if (http->ssl && (fwd->forward_host == NULL))
2107 * Just hang up. We already confirmed the client's CONNECT
2108 * request with status code 200 and unencrypted content is
2109 * no longer welcome.
2111 log_error(LOG_LEVEL_ERROR,
2112 "CONNECT already confirmed. Unable to tell the client about the problem.");
2116 rsp = error_response(csp, "connect-failed", errno);
2120 send_crunch_response(csp, rsp);
2126 /* Add a trailing zero. This lets filter_popups
2127 * use string operations.
2131 #ifdef FEATURE_KILL_POPUPS
2132 /* Filter the popups on this read. */
2133 if (block_popups_now)
2135 filter_popups(buf, csp);
2137 #endif /* def FEATURE_KILL_POPUPS */
2139 /* Normally, this would indicate that we've read
2140 * as much as the server has sent us and we can
2141 * close the client connection. However, Microsoft
2142 * in its wisdom has released IIS/5 with a bug that
2143 * prevents it from sending the trailing \r\n in
2144 * a 302 redirect header (and possibly other headers).
2145 * To work around this if we've haven't parsed
2146 * a full header we'll append a trailing \r\n
2147 * and see if this now generates a valid one.
2149 * This hack shouldn't have any impacts. If we've
2150 * already transmitted the header or if this is a
2151 * SSL connection, then we won't bother with this
2152 * hack. So we only work on partially received
2153 * headers. If we append a \r\n and this still
2154 * doesn't generate a valid header, then we won't
2155 * transmit anything to the client.
2160 if (server_body || http->ssl)
2163 * If we have been buffering up the document,
2164 * now is the time to apply content modification
2165 * and send the result to the client.
2170 * If the content filter fails, use the original
2171 * buffer and length.
2172 * (see p != NULL ? p : csp->iob->cur below)
2174 if (NULL == (p = (*content_filter)(csp)))
2176 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2179 hdr = sed(server_patterns_light, NULL, csp);
2183 /* FIXME Should handle error properly */
2184 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2187 if (write_socket(csp->cfd, hdr, strlen(hdr))
2188 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
2190 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2200 break; /* "game over, man" */
2204 * This is NOT the body, so
2205 * Let's pretend the server just sent us a blank line.
2207 snprintf(buf, sizeof(buf), "\r\n");
2208 len = (int)strlen(buf);
2211 * Now, let the normal header parsing algorithm below do its
2212 * job. If it fails, we'll exit instead of continuing.
2219 * If this is an SSL connection or we're in the body
2220 * of the server document, just write it to the client,
2221 * unless we need to buffer the body for later content-filtering
2224 if (server_body || http->ssl)
2229 * If there is no memory left for buffering the content, or the buffer limit
2230 * has been reached, switch to non-filtering mode, i.e. make & write the
2231 * header, flush the iob and buf, and get out of the way.
2233 if (add_to_iob(csp, buf, len))
2238 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
2240 hdr = sed(server_patterns, add_server_headers, csp);
2244 * Memory is too tight to even generate the header.
2245 * Send our static "Out-of-memory" page.
2247 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2248 rsp = cgi_error_memory();
2249 send_crunch_response(csp, rsp);
2254 hdrlen = strlen(hdr);
2256 if (write_socket(csp->cfd, hdr, hdrlen)
2257 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
2258 || (write_socket(csp->cfd, buf, (size_t)len)))
2260 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
2266 byte_count += hdrlen + (size_t)flushed + (size_t)len;
2268 content_filter = NULL;
2275 if (write_socket(csp->cfd, buf, (size_t)len))
2277 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2281 byte_count += (size_t)len;
2286 /* we're still looking for the end of the
2287 * server's header ... (does that make header
2288 * parsing an "out of body experience" ?
2292 * buffer up the data we just read. If that fails,
2293 * there's little we can do but send our static
2294 * out-of-memory page.
2296 if (add_to_iob(csp, buf, len))
2298 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2299 rsp = cgi_error_memory();
2300 send_crunch_response(csp, rsp);
2305 /* Convert iob into something sed() can digest */
2306 if (JB_ERR_PARSE == get_server_headers(csp))
2310 /* Well, we tried our MS IIS/5
2311 * hack and it didn't work.
2312 * The header is incomplete
2313 * and there isn't anything
2314 * we can do about it.
2320 /* Since we have to wait for
2321 * more from the server before
2322 * we can parse the headers
2323 * we just continue here.
2329 /* Did we actually get anything? */
2330 if (NULL == csp->headers->first)
2332 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
2333 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2334 strcpy(buf, NO_SERVER_DATA_RESPONSE);
2335 write_socket(csp->cfd, buf, strlen(buf));
2336 free_http_request(http);
2340 /* we have now received the entire header.
2341 * filter it and send the result to the client
2344 hdr = sed(server_patterns, add_server_headers, csp);
2347 /* FIXME Should handle error properly */
2348 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2351 #ifdef FEATURE_KILL_POPUPS
2352 /* Start blocking popups if appropriate. */
2354 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
2355 !http->ssl && /* We talk plaintext */
2356 block_popups) /* Policy allows */
2358 block_popups_now = 1;
2360 * Filter the part of the body that came in the same read
2361 * as the last headers:
2363 filter_popups(csp->iob->cur, csp);
2366 #endif /* def FEATURE_KILL_POPUPS */
2368 /* Buffer and pcrs filter this if appropriate. */
2370 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
2371 !http->ssl && /* We talk plaintext */
2372 pcrs_filter) /* Policy allows */
2374 content_filter = pcrs_filter_response;
2377 /* Buffer and gif_deanimate this if appropriate. */
2379 if ((csp->content_type & CT_GIF) && /* It's an image/gif MIME-Type */
2380 !http->ssl && /* We talk plaintext */
2381 gif_deanimate) /* Policy allows */
2383 content_filter = gif_deanimate_response;
2386 /* Buffer and jpg_inspect this if appropriate. */
2388 if ((csp->content_type & CT_JPEG) && /* It's an image/jpeg MIME-Type */
2389 !http->ssl && /* We talk plaintext */
2390 jpeg_inspect) /* Policy allows */
2392 content_filter = jpeg_inspect_response;
2396 * Only write if we're not buffering for content modification
2398 if (!content_filter)
2400 /* write the server's (modified) header to
2401 * the client (along with anything else that
2402 * may be in the buffer)
2405 if (write_socket(csp->cfd, hdr, strlen(hdr))
2406 || ((len = flush_socket(csp->cfd, csp)) < 0))
2408 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
2410 /* the write failed, so don't bother
2411 * mentioning it to the client...
2412 * it probably can't hear us anyway.
2418 byte_count += (size_t)len;
2421 /* we're finished with the server's header */
2426 /* If this was a MS IIS/5 hack then it means
2427 * the server has already closed the
2428 * connection. Nothing more to read. Time
2439 return; /* huh? we should never get here */
2442 if (csp->content_length == 0)
2445 * If Privoxy didn't recalculate the
2446 * Content-Lenght, byte_count is still
2449 csp->content_length = byte_count;
2452 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
2453 csp->ip_addr_str, http->ocmd, csp->content_length);
2457 /*********************************************************************
2461 * Description : This is little more than chat. We only "serve" to
2462 * to close any socket that chat may have opened.
2465 * 1 : csp = Current client state (buffers, headers, etc...)
2469 *********************************************************************/
2471 void serve(struct client_state *csp)
2472 #else /* ifndef AMIGA */
2473 static void serve(struct client_state *csp)
2474 #endif /* def AMIGA */
2477 close_socket(csp->cfd);
2479 if (csp->sfd != JB_INVALID_SOCKET)
2481 close_socket(csp->sfd);
2484 csp->flags &= ~CSP_FLAG_ACTIVE;
2490 /*********************************************************************
2492 * Function : server_thread
2494 * Description : We only exist to call `serve' in a threaded environment.
2497 * 1 : data = Current client state (buffers, headers, etc...)
2499 * Returns : Always 0.
2501 *********************************************************************/
2502 static int32 server_thread(void *data)
2504 serve((struct client_state *) data);
2511 /*********************************************************************
2515 * Description : Print usage info & exit.
2517 * Parameters : Pointer to argv[0] for identifying ourselves
2521 *********************************************************************/
2522 void usage(const char *myname)
2524 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
2526 "Usage: %s [--help] [--version] [configfile]\n"
2528 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
2530 "Aborting.\n", myname);
2537 /*********************************************************************
2539 * Function : initialize_mutexes
2541 * Description : Prepares mutexes if mutex support is available.
2545 * Returns : Void, exits in case of errors.
2547 *********************************************************************/
2548 void initialize_mutexes()
2552 #ifdef FEATURE_PTHREAD
2554 * Prepare global mutex semaphores
2556 err = pthread_mutex_init(&log_mutex, 0);
2558 if (!err) err = pthread_mutex_init(&log_init_mutex, 0);
2561 * XXX: The assumptions below are a bit naive
2562 * and can cause locks that aren't necessary.
2564 * For example older FreeBSD versions (< 6.x?)
2565 * have no gethostbyname_r, but gethostbyname is
2568 #ifndef HAVE_GMTIME_R
2569 if (!err) err = pthread_mutex_init(&gmtime_mutex, 0);
2570 #endif /* ndef HAVE_GMTIME_R */
2572 #ifndef HAVE_LOCALTIME_R
2573 if (!err) err = pthread_mutex_init(&localtime_mutex, 0);
2574 #endif /* ndef HAVE_GMTIME_R */
2576 #ifndef HAVE_GETHOSTBYADDR_R
2577 if (!err) err = pthread_mutex_init(&gethostbyaddr_mutex, 0);
2578 #endif /* ndef HAVE_GETHOSTBYADDR_R */
2580 #ifndef HAVE_GETHOSTBYNAME_R
2581 if (!err) err = pthread_mutex_init(&gethostbyname_mutex, 0);
2582 #endif /* ndef HAVE_GETHOSTBYNAME_R */
2585 if (!err) err = pthread_mutex_init(&rand_mutex, 0);
2586 #endif /* ndef HAVE_RANDOM */
2587 #endif /* FEATURE_PTHREAD */
2590 * TODO: mutex support for mingw32 would be swell.
2595 printf("Fatal error. Mutex initialization failed: %s.\n",
2604 /*********************************************************************
2608 * Description : Load the config file and start the listen loop.
2609 * This function is a lot more *sane* with the `load_config'
2610 * and `listen_loop' functions; although it stills does
2611 * a *little* too much for my taste.
2614 * 1 : argc = Number of parameters (including $0).
2615 * 2 : argv = Array of (char *)'s to the parameters.
2617 * Returns : 1 if : can't open config file, unrecognized directive,
2618 * stats requested in multi-thread mode, can't open the
2619 * log file, can't open the jar file, listen port is invalid,
2620 * any load fails, and can't bind port.
2622 * Else main never returns, the process must be signaled
2623 * to terminate execution. Or, on Windows, use the
2624 * "File", "Exit" menu option.
2626 *********************************************************************/
2628 int real_main(int argc, const char *argv[])
2630 int main(int argc, const char *argv[])
2634 unsigned int random_seed;
2636 struct passwd *pw = NULL;
2637 struct group *grp = NULL;
2646 #if !defined(_WIN32)
2654 * Parse the command line arguments
2656 while (++argc_pos < argc)
2659 /* Check to see if the service must be installed or uninstalled */
2660 if (strncmp(argv[argc_pos], "--install", 9) == 0)
2662 const char *pName = argv[argc_pos] + 9;
2665 exit( (install_service(pName)) ? 0 : 1 );
2667 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
2669 const char *pName = argv[argc_pos] + 11;
2672 exit((uninstall_service(pName)) ? 0 : 1);
2674 else if (strcmp(argv[argc_pos], "--service" ) == 0)
2676 bRunAsService = TRUE;
2677 w32_set_service_cwd();
2678 atexit(w32_service_exit_notify);
2681 #endif /* defined(_WIN32) */
2684 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2686 if (strcmp(argv[argc_pos], "--help") == 0)
2691 else if(strcmp(argv[argc_pos], "--version") == 0)
2693 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
2699 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
2704 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
2706 if (++argc_pos == argc) usage(argv[0]);
2707 pidfile = strdup(argv[argc_pos]);
2710 else if (strcmp(argv[argc_pos], "--user" ) == 0)
2712 if (++argc_pos == argc) usage(argv[argc_pos]);
2714 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
2717 if (NULL == (grp = getgrnam(p)))
2719 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
2723 if (NULL == (pw = getpwnam(argv[argc_pos])))
2725 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
2728 if (p != NULL) *--p = '\0';
2731 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
2736 #endif /* defined(unix) */
2737 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
2739 configfile = argv[argc_pos];
2742 } /* -END- while (more arguments) */
2745 if ( *configfile != '/' )
2747 char *abs_file, cwd[1024];
2749 /* make config-filename absolute here */
2750 if ( !(getcwd(cwd, sizeof(cwd))))
2752 perror("get working dir failed");
2756 if (!(basedir = strdup(cwd))
2757 || (!(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))))
2759 perror("malloc failed");
2762 strcpy( abs_file, basedir );
2763 strcat( abs_file, "/" );
2764 strcat( abs_file, configfile );
2765 configfile = abs_file;
2767 #endif /* defined unix */
2771 clients->next = NULL;
2775 #elif defined(_WIN32)
2779 /* Prepare mutexes if supported and necessary. */
2780 initialize_mutexes();
2782 random_seed = (unsigned int)time(NULL);
2784 srandom(random_seed);
2787 #endif /* ifdef HAVE_RANDOM */
2790 * Unix signal handling
2792 * Catch the abort, interrupt and terminate signals for a graceful exit
2793 * Catch the hangup signal so the errlog can be reopened.
2794 * Ignore the broken pipe signals (FIXME: Why?)
2796 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
2799 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
2800 const int ignored_signals[] = { SIGPIPE, 0 };
2802 for (idx = 0; catched_signals[idx] != 0; idx++)
2804 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
2805 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
2807 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
2808 #endif /* ifdef sun */
2810 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
2814 for (idx = 0; ignored_signals[idx] != 0; idx++)
2816 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
2818 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
2823 #else /* ifdef _WIN32 */
2824 # ifdef _WIN_CONSOLE
2826 * We *are* in a windows console app.
2827 * Print a verbose messages about FAQ's and such
2829 printf("%s", win32_blurb);
2830 # endif /* def _WIN_CONSOLE */
2831 #endif /* def _WIN32 */
2834 /* Initialize the CGI subsystem */
2835 cgi_init_error_messages();
2838 * If runnig on unix and without the --nodaemon
2839 * option, become a daemon. I.e. fork, detach
2840 * from tty and get process group leadership
2853 if ( pid < 0 ) /* error */
2858 else if ( pid != 0 ) /* parent */
2863 * must check for errors
2864 * child died due to missing files aso
2867 wpid = waitpid( pid, &status, WNOHANG );
2876 /* Should be more portable, but not as well tested */
2881 #else /* ndef __FreeBSD__ */
2883 #endif /* ndef __FreeBSD__ */
2884 fd = open("/dev/tty", O_RDONLY);
2887 /* no error check here */
2888 ioctl( fd, TIOCNOTTY,0 );
2892 /* FIXME: should close stderr (fd 2) here too, but the test
2894 * and load config file is done in listen_loop() and puts
2895 * some messages on stderr there.
2902 } /* -END- if (!no_daemon) */
2905 * As soon as we have written the PID file, we can switch
2906 * to the user and group ID indicated by the --user option
2912 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
2914 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
2920 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
2922 if (chroot(pw->pw_dir) < 0)
2924 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
2928 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
2931 if (setuid(pw->pw_uid))
2933 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
2937 char putenv_dummy[64];
2939 strcpy(putenv_dummy, "HOME=/");
2940 if (putenv(putenv_dummy) != 0)
2942 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
2945 snprintf(putenv_dummy, 64, "USER=%s", pw->pw_name);
2946 if (putenv(putenv_dummy) != 0)
2948 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
2954 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
2957 #endif /* defined unix */
2960 /* This will be FALSE unless the command line specified --service
2964 /* Yup, so now we must attempt to establish a connection
2965 * with the service dispatcher. This will only work if this
2966 * process was launched by the service control manager to
2967 * actually run as a service. If this isn't the case, i've
2968 * known it take around 30 seconds or so for the call to return.
2971 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
2972 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
2974 /* Service has run, and at this point is now being stopped, so just return */
2979 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
2981 /* An error occurred. Usually it's because --service was wrongly specified
2982 * and we were unable to connect to the Service Control Dispatcher because
2983 * it wasn't expecting us and is therefore not listening.
2985 * For now, just continue below to call the listen_loop function.
2988 #endif /* def _WIN32 */
2998 /*********************************************************************
3000 * Function : bind_port_helper
3002 * Description : Bind the listen port. Handles logging, and aborts
3006 * 1 : config = Privoxy configuration. Specifies port
3009 * Returns : Port that was opened.
3011 *********************************************************************/
3012 static jb_socket bind_port_helper(struct configuration_spec * config)
3017 if ( (config->haddr != NULL)
3018 && (config->haddr[0] == '1')
3019 && (config->haddr[1] == '2')
3020 && (config->haddr[2] == '7')
3021 && (config->haddr[3] == '.') )
3023 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
3026 else if (config->haddr == NULL)
3028 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3033 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3034 config->hport, config->haddr);
3037 result = bind_port(config->haddr, config->hport, &bfd);
3044 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3045 "There may be another Privoxy or some other "
3046 "proxy running on port %d",
3047 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
3048 config->hport, config->hport);
3051 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3052 "The hostname is not resolvable",
3053 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3056 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
3057 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3060 /* shouldn't get here */
3061 return JB_INVALID_SOCKET;
3064 config->need_bind = 0;
3071 /* Without this simple workaround we get this compiler warning from _beginthread
3072 * warning C4028: formal parameter 1 different from declaration
3074 void w32_service_listen_loop(void *p)
3078 #endif /* def _WIN32 */
3081 /*********************************************************************
3083 * Function : listen_loop
3085 * Description : bind the listen port and enter a "FOREVER" listening loop.
3091 *********************************************************************/
3092 static void listen_loop(void)
3094 struct client_state *csp = NULL;
3096 struct configuration_spec * config;
3098 config = load_config();
3100 bfd = bind_port_helper(config);
3102 #ifdef FEATURE_GRACEFUL_TERMINATION
3103 while (!g_terminate)
3108 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
3109 while (waitpid(-1, NULL, WNOHANG) > 0)
3111 /* zombie children */
3113 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
3116 * Free data that was used by died threads
3122 * Re-open the errlog after HUP signal
3124 if (received_hup_signal)
3126 init_error_log(Argv[0], config->logfile, config->debug);
3127 received_hup_signal = 0;
3132 #ifdef FEATURE_COOKIE_JAR
3134 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
3135 * already open. I think unload_configfile() is not being run, which should do
3136 * this work. Until that can get resolved, we'll use this workaround.
3140 if (csp->config->jar)
3142 fclose(csp->config->jar);
3143 csp->config->jar = NULL;
3145 #endif /* FEATURE_COOKIE_JAR */
3146 #endif /* __OS2__ */
3148 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
3150 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
3154 csp->flags |= CSP_FLAG_ACTIVE;
3155 csp->sfd = JB_INVALID_SOCKET;
3157 csp->config = config = load_config();
3159 if ( config->need_bind )
3162 * Since we were listening to the "old port", we will not see
3163 * a "listen" param change until the next IJB request. So, at
3164 * least 1 more request must be made for us to find the new
3165 * setting. I am simply closing the old socket and binding the
3168 * Which-ever is correct, we will serve 1 more page via the
3169 * old settings. This should probably be a "show-proxy-args"
3170 * request. This should not be a so common of an operation
3171 * that this will hurt people's feelings.
3176 bfd = bind_port_helper(config);
3179 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
3181 if (!accept_connection(csp, bfd))
3183 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
3196 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
3199 #ifdef FEATURE_TOGGLE
3200 if (global_toggle_state)
3202 csp->flags |= CSP_FLAG_TOGGLED_ON;
3204 #endif /* def FEATURE_TOGGLE */
3206 if (run_loader(csp))
3208 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
3209 /* Never get here - LOG_LEVEL_FATAL causes program exit */
3213 if (block_acl(NULL,csp))
3215 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
3216 close_socket(csp->cfd);
3220 #endif /* def FEATURE_ACL */
3222 /* add it to the list of clients */
3223 csp->next = clients->next;
3224 clients->next = csp;
3226 if (config->multi_threaded)
3230 /* this is a switch () statment in the C preprocessor - ugh */
3231 #undef SELECTED_ONE_OPTION
3233 /* Use Pthreads in preference to native code */
3234 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
3235 #define SELECTED_ONE_OPTION
3237 pthread_t the_thread;
3238 pthread_attr_t attrs;
3240 pthread_attr_init(&attrs);
3241 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
3242 errno = pthread_create(&the_thread, &attrs,
3243 (void * (*)(void *))serve, csp);
3244 child_id = errno ? -1 : 0;
3245 pthread_attr_destroy(&attrs);
3249 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
3250 #define SELECTED_ONE_OPTION
3251 child_id = _beginthread(
3252 (void (*)(void *))serve,
3257 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
3258 #define SELECTED_ONE_OPTION
3259 child_id = _beginthread(
3260 (void(* _Optlink)(void*))serve,
3266 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
3267 #define SELECTED_ONE_OPTION
3269 thread_id tid = spawn_thread
3270 (server_thread, "server", B_NORMAL_PRIORITY, csp);
3272 if ((tid >= 0) && (resume_thread(tid) == B_OK))
3274 child_id = (int) tid;
3283 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
3284 #define SELECTED_ONE_OPTION
3285 csp->cfd = ReleaseSocket(csp->cfd, -1);
3288 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3289 NP_Output, Output(),
3290 NP_CloseOutput, FALSE,
3291 NP_Name, (ULONG)"privoxy child",
3295 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3296 NP_Output, Output(),
3297 NP_CloseOutput, FALSE,
3298 NP_Name, (ULONG)"privoxy child",
3299 NP_StackSize, 200*1024,
3305 ((struct Task *)child_id)->tc_UserData = csp;
3306 Signal((struct Task *)child_id, SIGF_SINGLE);
3311 #if !defined(SELECTED_ONE_OPTION)
3314 /* This block is only needed when using fork().
3315 * When using threads, the server thread was
3316 * created and run by the call to _beginthread().
3318 if (child_id == 0) /* child */
3321 #ifdef FEATURE_TOGGLE
3322 int inherited_toggle_state = global_toggle_state;
3323 #endif /* def FEATURE_TOGGLE */
3328 * If we've been toggled or we've blocked the request, tell Mom
3331 #ifdef FEATURE_TOGGLE
3332 if (inherited_toggle_state != global_toggle_state)
3334 rc |= RC_FLAG_TOGGLED;
3336 #endif /* def FEATURE_TOGGLE */
3338 #ifdef FEATURE_STATISTICS
3339 if (csp->flags & CSP_FLAG_REJECTED)
3341 rc |= RC_FLAG_BLOCKED;
3343 #endif /* ndef FEATURE_STATISTICS */
3347 else if (child_id > 0) /* parent */
3349 /* in a fork()'d environment, the parent's
3350 * copy of the client socket and the CSP
3354 #if !defined(_WIN32) && !defined(__CYGWIN__)
3356 wait( &child_status );
3359 * Evaluate child's return code: If the child has
3360 * - been toggled, toggle ourselves
3361 * - blocked its request, bump up the stats counter
3364 #ifdef FEATURE_TOGGLE
3365 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
3367 global_toggle_state = !global_toggle_state;
3369 #endif /* def FEATURE_TOGGLE */
3371 #ifdef FEATURE_STATISTICS
3373 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
3377 #endif /* def FEATURE_STATISTICS */
3379 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
3380 close_socket(csp->cfd);
3381 csp->flags &= ~CSP_FLAG_ACTIVE;
3385 #undef SELECTED_ONE_OPTION
3386 /* end of cpp switch () */
3388 if (child_id < 0) /* failed */
3390 char buf[BUFFER_SIZE];
3392 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
3394 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
3396 write_socket(csp->cfd, buf, strlen(buf));
3397 close_socket(csp->cfd);
3398 csp->flags &= ~CSP_FLAG_ACTIVE;
3409 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
3411 /* Clean up. Aim: free all memory (no leaks) */
3412 #ifdef FEATURE_GRACEFUL_TERMINATION
3414 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
3416 unload_current_config_file();
3417 unload_current_actions_file();
3418 unload_current_re_filterfile();
3419 #ifdef FEATURE_TRUST
3420 unload_current_trust_file();
3423 if (config->multi_threaded)
3430 } while ((clients->next != NULL) && (--i > 0));
3434 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
3445 #ifdef FEATURE_COOKIE_JAR
3446 if (NULL != config->jar)
3448 fclose(config->jar);
3452 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
3453 /* Cleanup - remove taskbar icon etc. */
3458 #endif /* FEATURE_GRACEFUL_TERMINATION */