1 const char jcc_rcs[] = "$Id: jcc.c,v 1.139 2007/07/14 07:46:41 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 1.139 2007/07/14 07:46:41 fabiankeil
37 * - Allow to rewrite the request destination behind the client's back.
38 * - Turn the weird-looking unconditional for loop that
39 * reads the client request into a conditional while loop.
40 * Move the stuff that only runs once out of the loop.
41 * - Move parts of chat(), server_content_type() and the
42 * necessary stuff to fix BR#1750917 into get_filter_function().
44 * Revision 1.138 2007/06/03 18:45:18 fabiankeil
45 * Temporary workaround for BR#1730105.
47 * Revision 1.137 2007/06/01 18:16:36 fabiankeil
48 * Use the same mutex for gethostbyname() and gethostbyaddr() to prevent
49 * deadlocks and crashes on OpenBSD and possibly other OS with neither
50 * gethostbyname_r() nor gethostaddr_r(). Closes BR#1729174.
51 * Thanks to Ralf Horstmann for report and solution.
53 * Revision 1.136 2007/06/01 16:41:11 fabiankeil
54 * Add forward-override{} to change the forwarding settings through
55 * action sections. This is mainly interesting to forward different
56 * clients differently (for example based on User-Agent or request
59 * Revision 1.135 2007/05/24 17:03:50 fabiankeil
60 * - Let usage() mention the --chroot parameter.
61 * - Use read_socket() consistently and always leave
62 * the last buffer byte alone, even in cases where
63 * null termination (currently) doesn't matter.
65 * Revision 1.134 2007/05/16 14:59:46 fabiankeil
66 * - Fix config file loading on Unix if no config file is specified.
67 * Since r1.97 Privoxy would always interpret the last argument as
68 * config file, even if it's a valid command line option.
69 * - Abort in case of unrecognized command line options. Closes #1719696.
70 * - Remove a bunch of unnecessary strcpy() calls (yay for c&p without thinking).
71 * - Replace the remaining strcpy() and strcat() calls with strlcpy() and strcat().
73 * Revision 1.133 2007/05/04 11:23:19 fabiankeil
74 * - Don't rerun crunchers that only depend on the request URL.
75 * - Don't count redirects and CGI requests as "blocked requests".
77 * Revision 1.132 2007/04/25 15:15:17 fabiankeil
78 * Support crunching based on tags created by server-header taggers.
80 * Revision 1.131 2007/04/22 13:24:50 fabiankeil
81 * Make HTTP snippets static (again). Add a Content-Type for those
82 * with content so the browser doesn't guess it based on the URL.
84 * Revision 1.130 2007/04/19 13:47:34 fabiankeil
85 * Move crunching and request line rebuilding out of chat().
87 * Revision 1.129 2007/04/15 16:39:20 fabiankeil
88 * Introduce tags as alternative way to specify which
89 * actions apply to a request. At the moment tags can be
90 * created based on client and server headers.
92 * Revision 1.128 2007/03/25 16:55:54 fabiankeil
93 * Don't CLF-log CONNECT requests twice.
95 * Revision 1.127 2007/03/20 13:53:17 fabiankeil
96 * Log the source address for ACL-related connection drops.
98 * Revision 1.126 2007/03/17 15:20:05 fabiankeil
99 * New config option: enforce-blocks.
101 * Revision 1.125 2007/03/09 14:12:00 fabiankeil
102 * - Move null byte check into separate function.
103 * - Don't confuse the client with error pages
104 * if a CONNECT request was already confirmed.
106 * Revision 1.124 2007/02/23 14:59:54 fabiankeil
107 * Speed up NULL byte escaping and only log the complete
108 * NULL byte requests with header debugging enabled.
110 * Revision 1.123 2007/02/21 18:42:10 fabiankeil
111 * Answer requests that contain NULL bytes with
112 * a custom response instead of waiting for more
113 * data until the client eventually hangs up.
115 * Revision 1.122 2007/02/07 11:12:02 fabiankeil
116 * - Move delivery and logging of crunched responses
117 * from chat() into send_crunch_response().
118 * - Display the reason for generating http_responses.
119 * - Log the content length for LOG_LEVEL_CLF correctly
120 * (still incorrect for some fixed responses).
121 * - Reword an incorrect comment about
122 * treat-forbidden-connects-like-blocks violating
124 * - Add some log messages.
126 * Revision 1.121 2007/01/27 10:52:56 fabiankeil
127 * Move mutex initialization into separate
128 * function and exit in case of errors.
130 * Revision 1.120 2007/01/26 14:18:42 fabiankeil
131 * - Start to reduce chat()'s line count and move
132 * parts of it into separate functions.
133 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
135 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
136 * - Add Proxy-Agent header to HTTP snippets that are
137 * supposed to reach HTTP clients only.
138 * - Made a few CONNECT log messages more descriptive.
139 * - Catch completely empty server responses (as seen
140 * with Tor's fake ".noconnect" top level domain).
141 * - Use shiny new "forwarding-failed" template for socks errors.
143 * Revision 1.118 2007/01/07 07:43:43 joergs
144 * AmigaOS4 support added.
146 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
147 * Added config option accept-intercepted-requests
148 * and disabled it by default.
150 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
151 * Reverted parts of my last commit
152 * to keep error handling working.
154 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
155 * Fixed gcc43 conversion warnings.
157 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
158 * Fix -pedantic ISO C warning about converting
159 * from function pointer to object pointer.
161 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
162 * Silence compiler warning I introduced with my last commit.
164 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
165 * Mutex protect rand() if POSIX threading
166 * is used, warn the user if that's not possible
167 * and stop using it on _WIN32 where it could
170 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
171 * Don't prevent core dumps by catching SIGABRT.
172 * It's rude and makes debugging unreasonable painful.
174 * Revision 1.110 2006/12/13 14:52:53 etresoft
175 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
177 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
178 * Privoxy is now able to run as intercepting
179 * proxy in combination with any packet filter
180 * that does the port redirection. The destination
181 * is extracted from the "Host:" header which
182 * should be available for nearly all requests.
184 * Moved HTTP snipplets into jcc.c.
185 * Added error message for gopher proxy requests.
187 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
188 * Only unlink the pidfile if it's actually used.
190 * Change order of interception checks to make
191 * it possible to block or redirect requests for
194 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
195 * Make pthread mutex locking more generic. Instead of
196 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
197 * and use mutex locking unless there is an _r function
198 * available. Better safe than sorry.
200 * Fixes "./configure --disable-pthread" and should result
201 * in less threading-related problems on pthread-using platforms,
202 * but it still doesn't fix BR#1122404.
204 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
205 * Move pthread.h inclusion from jcc.c to jcc.h.
206 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
208 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
209 * Don't exit after receiving the second SIGHUP on Solaris.
211 * Fixes BR 1052235, but the same problem may exist on other
212 * systems. Once 3.0.6 is out we should use sigset()
213 * where available and see if it breaks anything.
215 * Revision 1.104 2006/09/23 13:26:38 roro
216 * Replace TABs by spaces in source code.
218 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
219 * Fix +redirect{}. Didn't work with -fast-redirects.
221 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
222 * Respond with 400 and a short text message
223 * if the client tries to use Privoxy as FTP proxy.
225 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
226 * Make number of retries in case of forwarded-connect problems
227 * a config file option (forwarded-connect-retries) and use 0 as
230 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
231 * Set random(3) seed.
233 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
234 * Follow the OpenBSD port's lead and protect the resolve
235 * functions on OpenBSD as well.
237 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
238 * --user fix. Only use the user as group if no group is specified.
239 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
241 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
242 * Windows service (re-)integration
246 * --install[:service_name]
247 * --uninstall[:service_name]
250 * They work as follows:
251 * --install will create a service for you and then terminate.
252 * By default the service name will be "privoxy" (without the quotes).
253 * However you can run multiple services if you wish, just by adding
254 * a colon and then a name (no spaces).
256 * --uninstall follows the exact same rules a --install.
258 * --service is used when the program is executed by the service
259 * control manager, and in normal circumstances would never be
260 * used as a command line argument.
262 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
263 * Windows service integration
265 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
266 * Incorporate Fabian Keil's patch work:
267 http://www.fabiankeil.de/sourcecode/privoxy/
269 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
270 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
271 * with what was really the latest development (the v_3_0_branch branch)
273 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
274 * Thanks to Jindrich Makovicka for a race condition fix for the log
275 * file. The race condition remains for non-pthread implementations.
276 * Reference patch #1175720.
278 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
279 * Add the ability to check jpeg images for invalid
280 * lengths of comment blocks. Defensive strategy
281 * against the exploit:
282 * Microsoft Security Bulletin MS04-028
283 * Buffer Overrun in JPEG Processing (GDI+) Could
284 * Allow Code Execution (833987)
285 * Enabled with +inspect-jpegs in actions files.
287 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
288 * - Fixed usage info for non-unix platforms
289 * - Fixed small cmdline parsing bug
291 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
292 * Diagnostics: Now preserve the returncode of pthread_create
293 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
295 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
296 * No longer ignore SIGCHLD. Fixes bug #769381
298 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
299 * Close jarfile on graceful exit, remove stray line
301 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
302 * Cosmetics: Killed a warning, a typo and an allocation left at exit
304 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
305 * No longer rely on non-POSIX.1 extensions of getcwd().
308 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
309 * Replaced setenv() by posix-compliant putenv()
310 * Thanks to Neil McCalden (nmcc AT users.sf.net).
312 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
313 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
315 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
316 * Clean-up and extension of improvements for forked mode:
317 * - Child's return code now consists of flags RC_FLAG_*
318 * - Reporting toggle to parent now properly #ifdef'ed
319 * - Children now report blocking to parent. This enables
320 * statistics in forked mode
322 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
323 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
324 * Children now report having been toggled through _exit(17), parents
325 * watch for that code and toggle themselves if found.
327 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
328 * Wrapping all *_r functions (the non-_r versions of them) with
329 * mutex semaphores for OSX. Hopefully this will take care of all
330 * of those pesky crash reports.
332 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
333 * Fixed two mostly harmless mem leaks
335 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
336 * Fix: Head of global clients list now initialized to NULL
338 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
339 * Added basic support for OPTIONS and TRACE HTTP methods:
340 * - New interceptor direct_response() added in chat().
341 * - sed() moved to earlier in the process, so that the
342 * Host: header is evaluated before actions and forwarding
345 * Revision 1.92 2002/05/08 16:00:46 oes
346 * Chat's buffer handling:
347 * - Fixed bug with unchecked out-of-mem conditions
348 * while reading client request & server headers
349 * - No longer predict if the buffer limit will be exceeded
350 * in the next read -- check add_to_iob's new
351 * return code. If buffer couldn't be extended
352 * (policy or out-of-mem) while
353 * - reading from client: abort
354 * - reading server headers: send error page
355 * - buffering server body for filter: flush,
356 * and if that fails: send error page
358 * Revision 1.91 2002/04/08 20:35:58 swa
361 * Revision 1.90 2002/04/02 14:57:28 oes
362 * Made sending wafers independent of FEATURE_COOKIE_JAR
364 * Revision 1.89 2002/03/31 17:18:59 jongfoster
365 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
367 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
368 * More compiler warning message maintenance
370 * Revision 1.87 2002/03/26 22:29:54 swa
371 * we have a new homepage!
373 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
374 * Workaround for closing the jarfile before load_config() comes around again
376 * Revision 1.85 2002/03/24 15:23:33 jongfoster
379 * Revision 1.84 2002/03/24 13:25:43 swa
380 * name change related issues
382 * Revision 1.83 2002/03/16 23:54:06 jongfoster
383 * Adding graceful termination feature, to help look for memory leaks.
384 * If you enable this (which, by design, has to be done by hand
385 * editing config.h) and then go to http://i.j.b/die, then the program
386 * will exit cleanly after the *next* request. It should free all the
387 * memory that was used.
389 * Revision 1.82 2002/03/13 00:27:05 jongfoster
392 * Revision 1.81 2002/03/12 01:42:50 oes
393 * Introduced modular filters
395 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
396 * OS/2 port maintenance:
397 * - Fixed EMX build - it had decayed a little
398 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
399 * substituted a memset for now.
401 * Revision 1.79 2002/03/09 20:03:52 jongfoster
402 * - Making various functions return int rather than size_t.
403 * (Undoing a recent change). Since size_t is unsigned on
404 * Windows, functions like read_socket that return -1 on
405 * error cannot return a size_t.
407 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
408 * crashes, and also frequently caused JB to jump to 100%
409 * CPU and stay there. (Because it thought it had just
410 * read ((unsigned)-1) == 4Gb of data...)
412 * - The signature of write_socket has changed, it now simply
413 * returns success=0/failure=nonzero.
415 * - Trying to get rid of a few warnings --with-debug on
416 * Windows, I've introduced a new type "jb_socket". This is
417 * used for the socket file descriptors. On Windows, this
418 * is SOCKET (a typedef for unsigned). Everywhere else, it's
419 * an int. The error value can't be -1 any more, so it's
420 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
421 * Windows it maps to the #define INVALID_SOCKET.)
423 * - The signature of bind_port has changed.
425 * Revision 1.78 2002/03/08 21:35:04 oes
426 * Added optional group supplement to --user option. Will now use default group of user if no group given
428 * Revision 1.77 2002/03/07 03:52:06 oes
429 * - Fixed compiler warnings etc
430 * - Improved handling of failed DNS lookups
432 * Revision 1.76 2002/03/06 22:54:35 jongfoster
433 * Automated function-comment nitpicking.
435 * Revision 1.75 2002/03/06 10:02:19 oes
436 * Fixed stupid bug when --user was not given
438 * Revision 1.74 2002/03/06 00:49:31 jongfoster
439 * Fixing warning on Windows
440 * Making #ifdefs that refer to the same variable consistently
441 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
443 * Revision 1.73 2002/03/05 23:57:30 hal9
444 * Stray character 's' on line 1618 was breaking build.
446 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
447 * - Re-enable OS/2 building after new parms were added
448 * - Fix false out of memory report when resolving CGI templates when no IP
449 * address is available of failed attempt (a la no such domain)
451 * Revision 1.71 2002/03/05 18:13:56 oes
452 * Added --user option
454 * Revision 1.70 2002/03/05 04:52:42 oes
455 * Deleted non-errlog debugging code
457 * Revision 1.69 2002/03/04 23:50:00 jongfoster
458 * Splitting off bind_port() call into bind_port_helper(), with
461 * Revision 1.68 2002/03/04 20:17:32 oes
464 * Revision 1.67 2002/03/04 18:18:57 oes
465 * - Removed _DEBUG mode
466 * - Cleand up cmdline parsing
467 * - Introduced --no-daemon, --pidfile options
468 * - Cleaned up signal handling:
469 * - Terminate cleanly on INT, TERM and ABRT
470 * - Schedule logfile for re-opening on HUP
471 * - Ignore CHLD and PIPE
472 * - Leave the rest with their default handlers
473 * - Uniform handler registration
474 * - Added usage() function
475 * - Played styleguide police
477 * Revision 1.66 2002/03/03 15:06:55 oes
478 * Re-enabled automatic config reloading
480 * Revision 1.65 2002/03/03 14:49:11 oes
481 * Fixed CLF logging: Now uses client's original HTTP request
483 * Revision 1.64 2002/03/03 09:18:03 joergs
484 * Made jumbjuster work on AmigaOS again.
486 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
487 * Clean up a little CRLF unpleasantness that suddenly appeared
489 * Revision 1.62 2002/02/20 23:17:23 jongfoster
490 * Detecting some out-of memory conditions and exiting with a log message.
492 * Revision 1.61 2002/01/17 21:01:52 jongfoster
493 * Moving all our URL and URL pattern parsing code to urlmatch.c.
495 * Revision 1.60 2001/12/30 14:07:32 steudten
496 * - Add signal handling (unix)
497 * - Add SIGHUP handler (unix)
498 * - Add creation of pidfile (unix)
499 * - Add action 'top' in rc file (RH)
500 * - Add entry 'SIGNALS' to manpage
501 * - Add exit message to logfile (unix)
503 * Revision 1.59 2001/12/13 14:07:18 oes
504 * Fixed Bug: 503 error page now sent OK
506 * Revision 1.58 2001/11/30 23:37:24 jongfoster
507 * Renaming the Win32 config file to config.txt - this is almost the
508 * same as the corresponding UNIX name "config"
510 * Revision 1.57 2001/11/16 00:47:43 jongfoster
511 * Changing the tty-disconnection code to use setsid().
513 * Revision 1.56 2001/11/13 20:20:54 jongfoster
514 * Tabs->spaces, fixing a bug with missing {} around an if()
516 * Revision 1.55 2001/11/13 20:14:53 jongfoster
517 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
519 * Revision 1.54 2001/11/07 00:03:14 steudten
520 * Give reliable return value if an error
521 * occurs not just 0 with new daemon mode.
523 * Revision 1.53 2001/11/05 21:41:43 steudten
524 * Add changes to be a real daemon just for unix os.
525 * (change cwd to /, detach from controlling tty, set
526 * process group and session leader to the own process.
528 * Add some fatal-error log message for failed malloc().
529 * Add '-d' if compiled with 'configure --with-debug' to
530 * enable debug output.
532 * Revision 1.52 2001/10/26 20:11:20 jongfoster
533 * Fixing type mismatch
535 * Revision 1.51 2001/10/26 17:38:28 oes
538 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
539 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
540 * threads to call select() simultaneously. So, it's time to do a real, live,
541 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
542 * (native). Both versions will work, but using __OS2__ offers multi-threading.
544 * Revision 1.49 2001/10/23 21:41:35 jongfoster
545 * Added call to initialize the (statically-allocated of course)
546 * "out of memory" CGI response.
548 * Revision 1.48 2001/10/10 19:56:46 jongfoster
549 * Moving some code that wasn't cookie-related out of an #ifdef
552 * Revision 1.47 2001/10/10 16:44:36 oes
553 * Added CONNECT destination port limitation check
555 * Revision 1.46 2001/10/08 15:17:41 oes
556 * Re-enabled SSL forwarding
558 * Revision 1.45 2001/10/07 15:42:11 oes
559 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
561 * Moved downgrading of the HTTP version from parse_http_request to
562 * chat(), since we can't decide if it is necessary before we have
563 * determined the actions for the URL. The HTTP command is now
564 * *always* re-built so the repairs need no longer be special-cased.
566 * filter_popups now gets a csp pointer so it can raise the new
567 * CSP_FLAG_MODIFIED flag.
571 * Added configurable size limit for the IOB. If the IOB grows so
572 * large that the next read would exceed the limit, the header
573 * is generated, and the header & unfiltered buffer are flushed
574 * to the client. Chat then continues in non-buffering,
575 * non-filtering body mode.
577 * Revision 1.44 2001/10/02 18:13:57 oes
580 * Revision 1.43 2001/10/02 15:32:13 oes
581 * Moved generation of hdr
583 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
584 * Cleaning up 2 compiler warnings on OS/2.
586 * Revision 1.41 2001/09/16 17:05:14 jongfoster
587 * Removing unused #include showarg.h
589 * Revision 1.40 2001/09/16 15:41:45 jongfoster
590 * Fixing signed/unsigned comparison warning.
592 * Revision 1.39 2001/09/16 13:21:27 jongfoster
593 * Changes to use new list functions.
595 * Revision 1.38 2001/09/16 13:01:46 jongfoster
596 * Removing redundant function call that zeroed zalloc()'d memory.
598 * Revision 1.37 2001/09/10 11:12:24 oes
599 * Deleted unused variable
601 * Revision 1.36 2001/09/10 10:56:15 oes
602 * Silenced compiler warnings
604 * Revision 1.35 2001/07/31 14:44:22 oes
605 * Deleted unused size parameter from filter_popups()
607 * Revision 1.34 2001/07/30 22:08:36 jongfoster
608 * Tidying up #defines:
609 * - All feature #defines are now of the form FEATURE_xxx
610 * - Permanently turned off WIN_GUI_EDIT
611 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
613 * Revision 1.33 2001/07/29 19:32:00 jongfoster
614 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
616 * Revision 1.32 2001/07/29 18:47:05 jongfoster
617 * Adding missing #include "loadcfg.h"
619 * Revision 1.31 2001/07/29 12:17:48 oes
620 * Applied pthread fix by Paul Lieverse
622 * Revision 1.30 2001/07/25 22:57:13 jongfoster
623 * __BEOS__ no longer overrides FEATURE_PTHREAD.
624 * This is because FEATURE_PTHREAD will soon be widely used, so I
625 * want to keep it simple.
627 * Revision 1.29 2001/07/24 12:47:06 oes
628 * Applied BeOS support update by Eugenia
630 * Revision 1.28 2001/07/23 13:26:12 oes
631 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
633 * Revision 1.27 2001/07/19 19:09:47 haroon
634 * - Added code to take care of the situation where while processing the first
635 * server response (which includes the server header), after finding the end
636 * of the headers we were not looking past the end of the headers for
637 * content modification. I enabled it for filter_popups.
638 * Someone else should look to see if other similar operations should be
639 * done to the discarded portion of the buffer.
641 * Note 2001/07/20: No, the other content modification mechanisms will process
642 * the whole iob later anyway. --oes
644 * Revision 1.26 2001/07/18 12:31:36 oes
647 * Revision 1.25 2001/07/15 19:43:49 jongfoster
648 * Supports POSIX threads.
649 * Also removed some unused #includes.
651 * Revision 1.24 2001/07/13 14:00:40 oes
652 * - Generic content modification scheme:
653 * Each feature has its own applicability flag that is set
654 * from csp->action->flags.
655 * Replaced the "filtering" int flag , by a function pointer
656 * "content_filter" to the function that will do the content
657 * modification. If it is != NULL, the document will be buffered
658 * and processed through *content_filter, which must set
659 * csp->content_length and return a modified copy of the body
660 * or return NULL (on failiure).
661 * - Changed csp->is_text to the more generic bitmap csp->content_type
662 * which can currently take the valued CT_TEXT or CT_GIF
664 * - Removed all #ifdef PCRS
666 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
667 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
668 * the `block_acl' call. This prevents a compilation error when the user
669 * does not wish to use the "ACL" feature.
671 * Revision 1.22 2001/06/29 21:45:41 oes
672 * Indentation, CRLF->LF, Tab-> Space
674 * Revision 1.21 2001/06/29 13:29:36 oes
675 * - Cleaned up, improved comments
676 * - Unified all possible interceptors (CGI,
677 * block, trust, fast_redirect) in one
678 * place, with one (CGI) answer generation
679 * mechansim. Much clearer now.
680 * - Removed the GIF image generation, which
681 * is now done in filters.c:block_url()
682 * - Made error conditions like domain lookup
683 * failiure or (various) problems while talking
684 * to the server use cgi.c:error_response()
685 * instead of generating HTML/HTTP in chat() (yuck!)
686 * - Removed logentry from cancelled commit
688 * Revision 1.20 2001/06/09 10:55:28 jongfoster
689 * Changing BUFSIZ ==> BUFFER_SIZE
691 * Revision 1.19 2001/06/07 23:12:52 jongfoster
692 * Replacing function pointer in struct gateway with a directly
693 * called function forwarded_connect().
694 * Replacing struct gateway with struct forward_spec
696 * Revision 1.18 2001/06/03 19:12:16 oes
697 * introduced new cgi handling
699 * Revision 1.17 2001/06/01 20:07:23 jongfoster
700 * Now uses action +image-blocker{} rather than config->tinygif
702 * Revision 1.16 2001/06/01 18:49:17 jongfoster
703 * Replaced "list_share" with "list" - the tiny memory gain was not
704 * worth the extra complexity.
706 * Revision 1.15 2001/05/31 21:24:47 jongfoster
707 * Changed "permission" to "action" throughout.
708 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
709 * Moved vanilla wafer check into chat(), since we must now
710 * decide whether or not to add it based on the URL.
712 * Revision 1.14 2001/05/29 20:14:01 joergs
713 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
716 * Revision 1.13 2001/05/29 09:50:24 jongfoster
717 * Unified blocklist/imagelist/permissionslist.
718 * File format is still under discussion, but the internal changes
721 * Also modified interceptor behaviour:
722 * - We now intercept all URLs beginning with one of the following
723 * prefixes (and *only* these prefixes):
725 * * http://ijbswa.sf.net/config/
726 * * http://ijbswa.sourceforge.net/config/
727 * - New interceptors "home page" - go to http://i.j.b/ to see it.
728 * - Internal changes so that intercepted and fast redirect pages
729 * are not replaced with an image.
730 * - Interceptors now have the option to send a binary page direct
731 * to the client. (i.e. ijb-send-banner uses this)
732 * - Implemented show-url-info interceptor. (Which is why I needed
733 * the above interceptors changes - a typical URL is
734 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
735 * The previous mechanism would not have intercepted that, and
736 * if it had been intercepted then it then it would have replaced
739 * Revision 1.12 2001/05/27 22:17:04 oes
741 * - re_process_buffer no longer writes the modified buffer
742 * to the client, which was very ugly. It now returns the
743 * buffer, which it is then written by chat.
745 * - content_length now adjusts the Content-Length: header
746 * for modified documents rather than crunch()ing it.
747 * (Length info in csp->content_length, which is 0 for
748 * unmodified documents)
750 * - For this to work, sed() is called twice when filtering.
752 * Revision 1.11 2001/05/26 17:27:53 jongfoster
753 * Added support for CLF and fixed LOG_LEVEL_LOG.
754 * Also did CRLF->LF fix of my previous patch.
756 * Revision 1.10 2001/05/26 15:26:15 jongfoster
757 * ACL feature now provides more security by immediately dropping
758 * connections from untrusted hosts.
760 * Revision 1.9 2001/05/26 00:28:36 jongfoster
761 * Automatic reloading of config file.
762 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
763 * Most of the global variables have been moved to a new
764 * struct configuration_spec, accessed through csp->config->globalname
765 * Most of the globals remaining are used by the Win32 GUI.
767 * Revision 1.8 2001/05/25 22:43:18 jongfoster
768 * Fixing minor memory leak and buffer overflow.
770 * Revision 1.7 2001/05/25 22:34:30 jongfoster
773 * Revision 1.6 2001/05/23 00:13:58 joergs
774 * AmigaOS support fixed.
776 * Revision 1.5 2001/05/22 18:46:04 oes
778 * - Enabled filtering banners by size rather than URL
779 * by adding patterns that replace all standard banner
780 * sizes with the "Junkbuster" gif to the re_filterfile
782 * - Enabled filtering WebBugs by providing a pattern
783 * which kills all 1x1 images
785 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
786 * which is selected by the (nonstandard and therefore
787 * capital) letter 'U' in the option string.
788 * It causes the quantifiers to be ungreedy by default.
789 * Appending a ? turns back to greedy (!).
791 * - Added a new interceptor ijb-send-banner, which
792 * sends back the "Junkbuster" gif. Without imagelist or
793 * MSIE detection support, or if tinygif = 1, or the
794 * URL isn't recognized as an imageurl, a lame HTML
795 * explanation is sent instead.
797 * - Added new feature, which permits blocking remote
798 * script redirects and firing back a local redirect
800 * The feature is conditionally compiled, i.e. it
801 * can be disabled with --disable-fast-redirects,
802 * plus it must be activated by a "fast-redirects"
803 * line in the config file, has its own log level
804 * and of course wants to be displayed by show-proxy-args
805 * Note: Boy, all the #ifdefs in 1001 locations and
806 * all the fumbling with configure.in and acconfig.h
807 * were *way* more work than the feature itself :-(
809 * - Because a generic redirect template was needed for
810 * this, tinygif = 3 now uses the same.
812 * - Moved GIFs, and other static HTTP response templates
817 * - Removed some >400 CRs again (Jon, you really worked
820 * Revision 1.4 2001/05/21 19:34:01 jongfoster
821 * Made failure to bind() a fatal error.
823 * Revision 1.3 2001/05/20 01:21:20 jongfoster
824 * Version 2.9.4 checkin.
825 * - Merged popupfile and cookiefile, and added control over PCRS
826 * filtering, in new "permissionsfile".
827 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
828 * file error you now get a message box (in the Win32 GUI) rather
829 * than the program exiting with no explanation.
830 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
832 * - Removed tabs from "config"
833 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
834 * - Bumped up version number.
836 * Revision 1.2 2001/05/17 22:34:44 oes
837 * - Added hint on GIF char array generation to jcc.c
838 * - Cleaned CRLF's from the sources and related files
839 * - Repaired logging for REF and FRC
841 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
842 * Initial import of version 2.9.3 source tree
845 *********************************************************************/
851 #include <sys/types.h>
860 # ifndef FEATURE_PTHREAD
864 # include <windows.h>
865 # include <process.h>
866 # endif /* ndef FEATURE_PTHREAD */
869 # ifndef _WIN_CONSOLE
871 # endif /* ndef _WIN_CONSOLE */
872 # include "w32svrapi.h"
874 #else /* ifndef _WIN32 */
876 # if !defined (__OS2__)
878 # include <sys/wait.h>
879 # endif /* ndef __OS2__ */
880 # include <sys/time.h>
881 # include <sys/stat.h>
882 # include <sys/ioctl.h>
885 #include <sys/termios.h>
896 # include <socket.h> /* BeOS has select() for sockets only. */
897 # include <OS.h> /* declarations for threads and stuff. */
900 # if defined(__EMX__) || defined(__OS2__)
901 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
906 #define bzero(B,N) memset(B,0x00,n)
921 #include "killpopup.h"
922 #include "miscutil.h"
924 #include "jbsockets.h"
929 #include "urlmatch.h"
931 const char jcc_h_rcs[] = JCC_H_VERSION;
932 const char project_h_rcs[] = PROJECT_H_VERSION;
935 struct client_state clients[1];
936 struct file_list files[1];
938 #ifdef FEATURE_STATISTICS
939 int urls_read = 0; /* total nr of urls read inc rejected */
940 int urls_rejected = 0; /* total nr of urls rejected */
941 #endif /* def FEATURE_STATISTICS */
943 #ifdef FEATURE_GRACEFUL_TERMINATION
947 static void listen_loop(void);
948 static void chat(struct client_state *csp);
950 void serve(struct client_state *csp);
951 #else /* ifndef AMIGA */
952 static void serve(struct client_state *csp);
953 #endif /* def AMIGA */
956 static int32 server_thread(void *data);
957 #endif /* def __BEOS__ */
960 #define sleep(N) Sleep(((N) * 1000))
964 #define sleep(N) DosSleep(((N) * 100))
967 #ifdef FEATURE_PTHREAD
968 pthread_mutex_t log_mutex;
969 pthread_mutex_t log_init_mutex;
971 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
972 pthread_mutex_t resolver_mutex;
973 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
975 #ifndef HAVE_GMTIME_R
976 pthread_mutex_t gmtime_mutex;
977 #endif /* ndef HAVE_GMTIME_R */
979 #ifndef HAVE_LOCALTIME_R
980 pthread_mutex_t localtime_mutex;
981 #endif /* ndef HAVE_GMTIME_R */
984 pthread_mutex_t rand_mutex;
985 #endif /* ndef HAVE_RANDOM */
987 #endif /* FEATURE_PTHREAD */
989 #if defined(unix) || defined(__EMX__)
990 const char *basedir = NULL;
991 const char *pidfile = NULL;
992 int received_hup_signal = 0;
993 #endif /* defined unix */
995 /* The vanilla wafer. */
996 static const char VANILLA_WAFER[] =
997 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
998 "Do_not_send_me_any_copyrighted_information_other_than_the_"
999 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
1000 "In_particular_do_not_send_me_any_cookies_that_"
1001 "are_subject_to_a_claim_of_copyright_by_anybody._"
1002 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
1003 "(copyright_or_otherwise)_applying_to_any_cookie._";
1005 /* HTTP snipplets. */
1006 const static char CSUCCEED[] =
1007 "HTTP/1.0 200 Connection established\n"
1008 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
1010 const static char CHEADER[] =
1011 "HTTP/1.0 400 Invalid header received from browser\r\n"
1012 "Proxy-Agent: Privoxy " VERSION "\r\n"
1013 "Content-Type: text/plain\r\n"
1014 "Connection: close\r\n\r\n"
1015 "Invalid header received from browser.\r\n";
1017 const static char CFORBIDDEN[] =
1018 "HTTP/1.0 403 Connection not allowable\r\n"
1019 "Proxy-Agent: Privoxy " VERSION "\r\n"
1020 "X-Hint: If you read this message interactively, then you know why this happens ,-)\r\n"
1021 "Connection: close\r\n\r\n";
1023 const static char FTP_RESPONSE[] =
1024 "HTTP/1.0 400 Invalid request received from browser\r\n"
1025 "Content-Type: text/plain\r\n"
1026 "Connection: close\r\n\r\n"
1027 "Invalid request. Privoxy doesn't support FTP.\r\n";
1029 const static char GOPHER_RESPONSE[] =
1030 "HTTP/1.0 400 Invalid request received from browser\r\n"
1031 "Content-Type: text/plain\r\n"
1032 "Connection: close\r\n\r\n"
1033 "Invalid request. Privoxy doesn't support gopher.\r\n";
1035 /* XXX: should be a template */
1036 const static char MISSING_DESTINATION_RESPONSE[] =
1037 "HTTP/1.0 400 Bad request received from browser\r\n"
1038 "Proxy-Agent: Privoxy " VERSION "\r\n"
1039 "Content-Type: text/plain\r\n"
1040 "Connection: close\r\n\r\n"
1041 "Bad request. Privoxy was unable to extract the destination.\r\n";
1043 /* XXX: should be a template */
1044 const static char NO_SERVER_DATA_RESPONSE[] =
1045 "HTTP/1.0 502 Server or forwarder response empty\r\n"
1046 "Proxy-Agent: Privoxy " VERSION "\r\n"
1047 "Content-Type: text/plain\r\n"
1048 "Connection: close\r\n\r\n"
1049 "Empty server or forwarder response.\r\n"
1050 "The connection was closed without sending any data.\r\n";
1052 /* XXX: should be a template */
1053 const static char NULL_BYTE_RESPONSE[] =
1054 "HTTP/1.0 400 Bad request received from browser\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. Null byte(s) before end of request.\r\n";
1060 /* XXX: should be a template */
1061 const static char MESSED_UP_REQUEST_RESPONSE[] =
1062 "HTTP/1.0 400 Malformed request after rewriting\r\n"
1063 "Proxy-Agent: Privoxy " VERSION "\r\n"
1064 "Content-Type: text/plain\r\n"
1065 "Connection: close\r\n\r\n"
1066 "Bad request. Messed up with header filters.\r\n";
1068 /* A function to crunch a response */
1069 typedef struct http_response *(*crunch_func_ptr)(struct client_state *);
1071 typedef char *(*filter_function_ptr)();
1073 /* Crunch function flags */
1074 #define CF_NO_FLAGS 0
1075 /* Cruncher applies to forced requests as well */
1076 #define CF_IGNORE_FORCE 1
1077 /* Crunched requests are counted for the block statistics */
1078 #define CF_COUNT_AS_REJECT 2
1080 /* A crunch function and its flags */
1083 const crunch_func_ptr cruncher;
1087 /* Complete list of cruncher functions */
1088 const static struct cruncher crunchers_all[] = {
1089 { direct_response, CF_COUNT_AS_REJECT|CF_IGNORE_FORCE},
1090 { block_url, CF_COUNT_AS_REJECT },
1091 #ifdef FEATURE_TRUST
1092 { trust_url, CF_COUNT_AS_REJECT },
1093 #endif /* def FEATURE_TRUST */
1094 { redirect_url, CF_NO_FLAGS },
1095 { dispatch_cgi, CF_IGNORE_FORCE},
1099 /* Light version, used after tags are applied */
1100 const static struct cruncher crunchers_light[] = {
1101 { block_url, CF_COUNT_AS_REJECT },
1102 { redirect_url, CF_NO_FLAGS },
1107 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1108 /*********************************************************************
1110 * Function : sig_handler
1112 * Description : Signal handler for different signals.
1113 * Exit gracefully on TERM and INT
1114 * or set a flag that will cause the errlog
1115 * to be reopened by the main thread on HUP.
1118 * 1 : the_signal = the signal cause this function to call
1122 *********************************************************************/
1123 static void sig_handler(int the_signal)
1129 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
1140 received_hup_signal = 1;
1145 * We shouldn't be here, unless we catch signals
1146 * in main() that we can't handle here!
1148 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1156 /*********************************************************************
1158 * Function : client_protocol_is_unsupported
1160 * Description : Checks if the client used a known unsupported
1161 * protocol and deals with it by sending an error
1165 * 1 : csp = Current client state (buffers, headers, etc...)
1166 * 2 : req = the first request line send by the client
1168 * Returns : TRUE if an error response has been generated, or
1169 * FALSE if the request doesn't look invalid.
1171 *********************************************************************/
1172 int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1174 char buf[BUFFER_SIZE];
1177 * If it's a FTP or gopher request, we don't support it.
1179 * These checks are better than nothing, but they might
1180 * not work in all configurations and some clients might
1181 * have problems digesting the answer.
1183 * They should, however, never cause more problems than
1184 * Privoxy's old behaviour (returning the misleading HTML
1187 * "Could not resolve http://(ftp|gopher)://example.org").
1189 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1191 if (!strncmpic(req, "GET ftp://", 10))
1193 strlcpy(buf, FTP_RESPONSE, sizeof(buf));
1194 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as FTP proxy: %s",
1195 csp->ip_addr_str, req);
1199 strlcpy(buf, GOPHER_RESPONSE, sizeof(buf));
1200 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as gopher proxy: %s",
1201 csp->ip_addr_str, req);
1203 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1205 write_socket(csp->cfd, buf, strlen(buf));
1214 /*********************************************************************
1216 * Function : get_request_destination_elsewhere
1218 * Description : If the client's request was redirected into
1219 * Privoxy without the client's knowledge,
1220 * the request line lacks the destination host.
1222 * This function tries to get it elsewhere,
1223 * provided accept-intercepted-requests is enabled.
1225 * "Elsewhere" currently only means "Host: header",
1226 * but in the future we may ask the redirecting
1227 * packet filter to look the destination up.
1229 * If the destination stays unknown, an error
1230 * response is send to the client and headers
1231 * are freed so that chat() can return directly.
1234 * 1 : csp = Current client state (buffers, headers, etc...)
1235 * 2 : headers = a header list
1237 * Returns : JB_ERR_OK if the destination is now known, or
1238 * JB_ERR_PARSE if it isn't.
1240 *********************************************************************/
1241 jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1245 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1247 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1248 " Privoxy isn't configured to accept intercepted requests.",
1249 csp->ip_addr_str, csp->http->cmd);
1250 /* XXX: Use correct size */
1251 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1252 csp->ip_addr_str, csp->http->cmd);
1254 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1255 destroy_list(headers);
1257 return JB_ERR_PARSE;
1259 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1261 /* Split the domain we just got for pattern matching */
1262 init_domain_components(csp->http);
1268 /* We can't work without destination. Go spread the news.*/
1270 req = list_to_text(headers);
1272 /* XXX: Use correct size */
1273 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1274 csp->ip_addr_str, csp->http->cmd);
1275 log_error(LOG_LEVEL_ERROR,
1276 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1277 csp->ip_addr_str, csp->http->cmd, req);
1280 write_socket(csp->cfd, MISSING_DESTINATION_RESPONSE, strlen(MISSING_DESTINATION_RESPONSE));
1281 destroy_list(headers);
1283 return JB_ERR_PARSE;
1286 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1287 * to get the destination IP address, use it as host directly
1288 * or do a reverse DNS lookup first.
1293 /*********************************************************************
1295 * Function : get_server_headers
1297 * Description : Parses server headers in iob and fills them
1298 * into csp->headers so that they can later be
1302 * 1 : csp = Current client state (buffers, headers, etc...)
1304 * Returns : JB_ERR_OK if everything went fine, or
1305 * JB_ERR_PARSE if the headers were incomplete.
1307 *********************************************************************/
1308 jb_err get_server_headers(struct client_state *csp)
1310 int continue_hack_in_da_house = 0;
1313 while (((header = get_header(csp)) != NULL) || continue_hack_in_da_house)
1318 * continue hack in da house. Ignore the ending of
1319 * this head and continue enlisting header lines.
1320 * The reason is described below.
1322 enlist(csp->headers, "");
1323 continue_hack_in_da_house = 0;
1326 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1329 * It's a bodyless continue response, don't
1330 * stop header parsing after reaching it's end.
1332 * As a result Privoxy will concatenate the
1333 * next response's head and parse and deliver
1334 * the headers as if they belonged to one request.
1336 * The client will separate them because of the
1337 * empty line between them.
1339 * XXX: What we're doing here is clearly against
1340 * the intended purpose of the continue header,
1341 * and under some conditions (HTTP/1.0 client request)
1342 * it's a standard violation.
1344 * Anyway, "sort of against the spec" is preferable
1345 * to "always getting confused by Continue responses"
1346 * (Privoxy's behaviour before this hack was added)
1348 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1349 continue_hack_in_da_house = 1;
1351 else if (*header == '\0')
1354 * If the header is empty, but the Continue hack
1355 * isn't active, we can assume that we reached the
1356 * end of the buffer before we hit the end of the
1359 * Inform the caller an let it decide how to handle it.
1361 return JB_ERR_PARSE;
1365 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1368 * XXX: Should we quit the request and return a
1369 * out of memory error page instead?
1371 log_error(LOG_LEVEL_ERROR,
1372 "Out of memory while enlisting server headers. %s lost.",
1382 /*********************************************************************
1384 * Function : crunch_reason
1386 * Description : Translates the crunch reason code into a string.
1389 * 1 : rsp = a http_response
1391 * Returns : A string with the crunch reason or an error description.
1393 *********************************************************************/
1394 const char *crunch_reason(const struct http_response *rsp)
1396 char * reason = NULL;
1398 assert(rsp != NULL);
1401 return "Internal error while searching for crunch reason";
1404 switch (rsp->reason)
1406 case RSP_REASON_UNSUPPORTED:
1407 reason = "Unsupported HTTP feature";
1409 case RSP_REASON_BLOCKED:
1412 case RSP_REASON_UNTRUSTED:
1413 reason = "Untrusted";
1415 case RSP_REASON_REDIRECTED:
1416 reason = "Redirected";
1418 case RSP_REASON_CGI_CALL:
1419 reason = "CGI Call";
1421 case RSP_REASON_NO_SUCH_DOMAIN:
1422 reason = "DNS failure";
1424 case RSP_REASON_FORWARDING_FAILED:
1425 reason = "Forwarding failed";
1427 case RSP_REASON_CONNECT_FAILED:
1428 reason = "Connection failure";
1430 case RSP_REASON_OUT_OF_MEMORY:
1431 reason = "Out of memory (may mask other reasons)";
1434 reason = "No reason recorded";
1442 /*********************************************************************
1444 * Function : send_crunch_response
1446 * Description : Delivers already prepared response for
1447 * intercepted requests, logs the interception
1448 * and frees the response.
1451 * 1 : csp = Current client state (buffers, headers, etc...)
1452 * 1 : rsp = Fully prepared response. Will be freed on exit.
1454 * Returns : Nothing.
1456 *********************************************************************/
1457 void send_crunch_response(struct client_state *csp, struct http_response *rsp)
1459 const struct http_request *http = csp->http;
1460 char status_code[4];
1462 assert(rsp != NULL);
1463 assert(rsp->head != NULL);
1468 * Not supposed to happen. If it does
1469 * anyway, treat it as an unknown error.
1471 cgi_error_unknown(csp, rsp, RSP_REASON_INTERNAL_ERROR);
1472 /* return code doesn't matter */
1477 /* If rsp is still NULL, we have serious internal problems. */
1478 log_error(LOG_LEVEL_FATAL,
1479 "NULL response in send_crunch_response and cgi_error_unknown failed as well.");
1483 * Extract the status code from the actual head
1484 * that was send to the client. It is the only
1485 * way to get it right for all requests, including
1486 * the fixed ones for out-of-memory problems.
1488 * A head starts like this: 'HTTP/1.1 200...'
1492 status_code[0] = rsp->head[9];
1493 status_code[1] = rsp->head[10];
1494 status_code[2] = rsp->head[11];
1495 status_code[3] = '\0';
1497 /* Write the answer to the client */
1498 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1499 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1501 /* There is nothing we can do about it. */
1502 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", csp->http->host);
1505 /* Log that the request was crunched and why. */
1506 log_error(LOG_LEVEL_GPC, "%s%s crunch! (%s)",
1507 http->hostport, http->path, crunch_reason(rsp));
1508 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" %s %d",
1509 csp->ip_addr_str, http->ocmd, status_code, rsp->content_length);
1511 /* Clean up and return */
1512 if (cgi_error_memory() != rsp)
1514 free_http_response(rsp);
1520 /*********************************************************************
1522 * Function : request_contains_null_bytes
1524 * Description : Checks for NULL bytes in the request and sends
1525 * an error message to the client if any were found.
1528 * 1 : csp = Current client state (buffers, headers, etc...)
1529 * 2 : buf = Data from the client's request to check.
1530 * 3 : len = The data length.
1532 * Returns : TRUE if the request contained one or more NULL bytes, or
1535 *********************************************************************/
1536 int request_contains_null_bytes(const struct client_state *csp, char *buf, int len)
1538 size_t c_len; /* Request lenght when treated as C string */
1540 c_len = strlen(buf);
1545 * Null byte(s) found. Log the request,
1546 * return an error response and hang up.
1548 size_t tmp_len = c_len;
1553 * Replace NULL byte(s) with '°' characters
1554 * so the request can be logged as string.
1555 * XXX: Is there a better replacement character?
1558 tmp_len += strlen(buf+tmp_len);
1559 } while (tmp_len < len);
1561 log_error(LOG_LEVEL_ERROR, "%s\'s request contains at least one NULL byte "
1562 "(length=%d, strlen=%d).", csp->ip_addr_str, len, c_len);
1563 log_error(LOG_LEVEL_HEADER,
1564 "Offending request data with NULL bytes turned into \'°\' characters: %s", buf);
1566 write_socket(csp->cfd, NULL_BYTE_RESPONSE, strlen(NULL_BYTE_RESPONSE));
1568 /* XXX: Log correct size */
1569 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1578 /*********************************************************************
1580 * Function : crunch_response_triggered
1582 * Description : Checks if the request has to be crunched,
1583 * and delivers the crunch response if necessary.
1586 * 1 : csp = Current client state (buffers, headers, etc...)
1587 * 2 : crunchers = list of cruncher functions to run
1589 * Returns : TRUE if the request was answered with a crunch response
1592 *********************************************************************/
1593 int crunch_response_triggered(struct client_state *csp, const struct cruncher crunchers[])
1595 struct http_response *rsp = NULL;
1596 const struct cruncher *c;
1599 * If CGI request crunching is disabled,
1600 * check the CGI dispatcher out of order to
1601 * prevent unintentional blocks or redirects.
1603 if (!(csp->config->feature_flags & RUNTIME_FEATURE_CGI_CRUNCHING)
1604 && (NULL != (rsp = dispatch_cgi(csp))))
1606 /* Deliver, log and free the interception response. */
1607 send_crunch_response(csp, rsp);
1611 for (c = crunchers; c->cruncher != NULL; c++)
1614 * Check the cruncher if either Privoxy is toggled
1615 * on and the request isn't forced, or if the cruncher
1616 * applies to forced requests as well.
1618 if (((csp->flags & CSP_FLAG_TOGGLED_ON) &&
1619 !(csp->flags & CSP_FLAG_FORCED)) ||
1620 (c->flags & CF_IGNORE_FORCE))
1622 rsp = c->cruncher(csp);
1625 /* Deliver, log and free the interception response. */
1626 send_crunch_response(csp, rsp);
1627 #ifdef FEATURE_STATISTICS
1628 if (c->flags & CF_COUNT_AS_REJECT)
1630 csp->flags |= CSP_FLAG_REJECTED;
1632 #endif /* def FEATURE_STATISTICS */
1643 /*********************************************************************
1645 * Function : build_request_line
1647 * Description : Builds the HTTP request line.
1649 * If a HTTP forwarder is used it expects the whole URL,
1650 * web servers only get the path.
1653 * 1 : csp = Current client state (buffers, headers, etc...)
1654 * 2 : fwd = The forwarding spec used for the request
1655 * XXX: Should use http->fwd instead.
1656 * 3 : request_line = The old request line which will be replaced.
1658 * Returns : Nothing. Terminates in case of memory problems.
1660 *********************************************************************/
1661 void build_request_line(struct client_state *csp, const struct forward_spec *fwd, char **request_line)
1663 struct http_request *http = csp->http;
1665 assert(http->ssl == 0);
1668 * Downgrade http version from 1.1 to 1.0
1669 * if +downgrade action applies.
1671 if ( (csp->action->flags & ACTION_DOWNGRADE)
1672 && (!strcmpic(http->ver, "HTTP/1.1")))
1675 http->ver = strdup("HTTP/1.0");
1677 if (http->ver == NULL)
1679 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1684 * Rebuild the request line.
1686 freez(*request_line);
1687 *request_line = strdup(http->gpc);
1688 string_append(request_line, " ");
1690 if (fwd->forward_host)
1692 string_append(request_line, http->url);
1696 string_append(request_line, http->path);
1698 string_append(request_line, " ");
1699 string_append(request_line, http->ver);
1701 if (*request_line == NULL)
1703 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1705 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", *request_line);
1709 /*********************************************************************
1711 * Function : change_request_destination
1713 * Description : Parse a (rewritten) request line and regenerate
1714 * the http request data.
1717 * 1 : csp = Current client state (buffers, headers, etc...)
1719 * Returns : Forwards the parse_http_request() return code.
1720 * Terminates in case of memory problems.
1722 *********************************************************************/
1723 jb_err change_request_destination(struct client_state *csp)
1725 struct http_request *http = csp->http;
1728 log_error(LOG_LEVEL_INFO, "Rewrite detected: %s", csp->headers->first->str);
1729 free_http_request(http);
1730 err = parse_http_request(csp->headers->first->str, http, csp);
1731 if (JB_ERR_OK != err)
1733 log_error(LOG_LEVEL_ERROR, "Couldn't parse rewritten request: %s.",
1734 jb_err_to_string(err));
1736 http->ocmd = strdup(http->cmd); /* XXX: ocmd is a misleading name */
1737 if (http->ocmd == NULL)
1739 log_error(LOG_LEVEL_FATAL, "Out of memory copying rewritten HTTP request line");
1746 /*********************************************************************
1748 * Function : get_filter_function
1750 * Description : Decides which content filter function has
1751 * to be applied (if any).
1753 * XXX: Doesn't handle filter_popups()
1754 * because of the different prototype. Probably
1755 * we should ditch filter_popups() anyway, it's
1756 * even less reliable than popup blocking based
1760 * 1 : csp = Current client state (buffers, headers, etc...)
1762 * Returns : The content filter function to run, or
1763 * NULL if no content filter is active
1765 *********************************************************************/
1766 filter_function_ptr get_filter_function(struct client_state *csp)
1768 filter_function_ptr filter_function = NULL;
1771 * Are we enabling text mode by force?
1773 if (csp->action->flags & ACTION_FORCE_TEXT_MODE)
1776 * Do we really have to?
1778 if (csp->content_type & CT_TEXT)
1780 log_error(LOG_LEVEL_HEADER, "Text mode is already enabled.");
1784 csp->content_type |= CT_TEXT;
1785 log_error(LOG_LEVEL_HEADER, "Text mode enabled by force. Take cover!");
1789 if (!(csp->content_type & CT_DECLARED))
1792 * The server didn't bother to declare a MIME-Type.
1793 * Assume it's text that can be filtered.
1795 * This also regulary happens with 304 responses,
1796 * therefore logging anything here would cause
1799 csp->content_type |= CT_TEXT;
1804 * Choose the applying filter function based on
1805 * the content type and action settings.
1807 if ((csp->content_type & CT_TEXT) &&
1808 (csp->rlist != NULL) &&
1809 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER])))
1811 filter_function = pcrs_filter_response;
1813 else if ((csp->content_type & CT_GIF) &&
1814 (csp->action->flags & ACTION_DEANIMATE))
1816 filter_function = gif_deanimate_response;
1818 else if ((csp->content_type & CT_JPEG) &&
1819 (csp->action->flags & ACTION_JPEG_INSPECT))
1821 filter_function = jpeg_inspect_response;
1824 return filter_function;
1827 /*********************************************************************
1831 * Description : Once a connection to the client has been accepted,
1832 * this function is called (via serve()) to handle the
1833 * main business of the communication. When this
1834 * function returns, the caller must close the client
1837 * FIXME: chat is nearly thousand lines long.
1841 * 1 : csp = Current client state (buffers, headers, etc...)
1843 * Returns : Nothing.
1845 *********************************************************************/
1846 static void chat(struct client_state *csp)
1848 char buf[BUFFER_SIZE];
1856 int ms_iis5_hack = 0;
1857 size_t byte_count = 0;
1858 int forwarded_connect_retries = 0;
1859 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
1860 const struct forward_spec * fwd;
1861 struct http_request *http;
1862 int len; /* for buffer sizes (and negative error codes) */
1864 #ifdef FEATURE_KILL_POPUPS
1865 int block_popups_now = 0; /* bool, 1==currently blocking popups */
1866 #endif /* def FEATURE_KILL_POPUPS */
1868 /* Function that does the content filtering for the current request */
1869 filter_function_ptr content_filter = NULL;
1871 /* Skeleton for HTTP response, if we should intercept the request */
1872 struct http_response *rsp;
1874 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1875 struct list header_list;
1876 struct list *headers = &header_list;
1880 memset(buf, 0, sizeof(buf));
1883 * Read the client's request. Note that since we're not using select() we
1884 * could get blocked here if a client connected, then didn't say anything!
1889 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1891 if (len <= 0) break; /* error! */
1894 * If there is no memory left for buffering the
1895 * request, there is nothing we can do but hang up
1897 if (add_to_iob(csp, buf, len))
1902 req = get_header(csp);
1904 } while ((NULL != req) && ('\0' == *req));
1908 /* Request received. Validate and parse it. */
1912 * XXX: Temporary disabled to prevent problems
1913 * with POST requests whose bodies are allowed to
1914 * contain NULL bytes. BR#1730105.
1916 * The main purpose of this check is to properly
1917 * log stuff like BitTorrent traffic and other junk
1918 * that hits public proxies. It's not required for
1919 * Privoxy to functions as those requests are discarded
1922 * It probably should be rewritten to only check
1923 * the head of the request. Another option would
1924 * be to let all POST requests pass, although that
1925 * may not be good enough.
1927 if (request_contains_null_bytes(csp, buf, len))
1929 /* NULL bytes found and dealt with, just hang up. */
1934 /* Does the request line look invalid? */
1935 if (client_protocol_is_unsupported(csp, req))
1938 * Yes. The request has already been
1939 * answered with a error response, the buffers
1940 * were freed and we're done with chatting.
1945 #ifdef FEATURE_FORCE_LOAD
1947 * If this request contains the FORCE_PREFIX and blocks
1948 * aren't enforced, get rid of it and set the force flag.
1950 if (strstr(req, FORCE_PREFIX))
1952 if (csp->config->feature_flags & RUNTIME_FEATURE_ENFORCE_BLOCKS)
1954 log_error(LOG_LEVEL_FORCE,
1955 "Ignored force prefix in request: \"%s\".", req);
1959 strclean(req, FORCE_PREFIX);
1960 log_error(LOG_LEVEL_FORCE, "Enforcing request: \"%s\".", req);
1961 csp->flags |= CSP_FLAG_FORCED;
1965 #endif /* def FEATURE_FORCE_LOAD */
1966 err = parse_http_request(req, http, csp);
1967 if (JB_ERR_OK != err)
1969 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", jb_err_to_string(err));
1975 if (http->cmd == NULL)
1977 write_socket(csp->cfd, CHEADER, strlen(CHEADER));
1978 /* XXX: Use correct size */
1979 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request\" 400 0", csp->ip_addr_str);
1980 log_error(LOG_LEVEL_ERROR, "Invalid header received from %s.", csp->ip_addr_str);
1982 free_http_request(http);
1986 /* grab the rest of the client's headers */
1990 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1992 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
1995 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
2000 * If there is no memory left for buffering the
2001 * request, there is nothing we can do but hang up
2003 if (add_to_iob(csp, buf, len))
2010 if (p == NULL) break;
2017 if (http->host == NULL)
2020 * If we still don't know the request destination,
2021 * the request is invalid or the client uses
2022 * Privoxy without its knowledge.
2024 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
2027 * Our attempts to get the request destination
2028 * elsewhere failed or Privoxy is configured
2029 * to only accept proxy requests.
2031 * An error response has already been send
2032 * and we're done here.
2039 * Determine the actions for this URL
2041 #ifdef FEATURE_TOGGLE
2042 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
2044 /* Most compatible set of actions (i.e. none) */
2045 init_current_action(csp->action);
2048 #endif /* ndef FEATURE_TOGGLE */
2050 url_actions(http, csp);
2054 * Save a copy of the original request for logging
2056 http->ocmd = strdup(http->cmd);
2058 if (http->ocmd == NULL)
2060 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
2063 enlist(csp->headers, http->cmd);
2065 /* Append the previously read headers */
2066 list_append_list_unique(csp->headers, headers);
2067 destroy_list(headers);
2070 * If the user has not supplied any wafers, and the user has not
2071 * told us to suppress the vanilla wafer, then send the vanilla wafer.
2073 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
2074 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
2076 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
2079 err = sed(client_patterns, add_client_headers, csp);
2080 if (JB_ERR_OK != err)
2082 assert(err == JB_ERR_PARSE);
2083 log_error(LOG_LEVEL_FATAL, "Failed to parse client headers");
2085 csp->flags |= CSP_FLAG_CLIENT_HEADER_PARSING_DONE;
2087 if (strcmp(http->cmd, csp->headers->first->str))
2090 * A header filter rewrote the request line,
2091 * modify the http request accordingly.
2093 if (JB_ERR_OK != change_request_destination(csp))
2095 write_socket(csp->cfd, MESSED_UP_REQUEST_RESPONSE, strlen(MESSED_UP_REQUEST_RESPONSE));
2096 /* XXX: Use correct size */
2097 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"Invalid request generated\" 500 0", csp->ip_addr_str);
2098 log_error(LOG_LEVEL_ERROR, "Invalid request line after applying header filters.");
2100 free_http_request(http);
2105 /* decide how to route the HTTP request */
2106 if (NULL == (fwd = forward_url(http, csp)))
2108 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
2109 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2112 /* build the http request to send to the server
2113 * we have to do one of the following:
2115 * create = use the original HTTP request to create a new
2116 * HTTP request that has either the path component
2117 * without the http://domainspec (w/path) or the
2118 * full orininal URL (w/url)
2119 * Note that the path and/or the HTTP version may
2120 * have been altered by now.
2122 * connect = Open a socket to the host:port of the server
2123 * and short-circuit server and client socket.
2125 * pass = Pass the request unchanged if forwarding a CONNECT
2126 * request to a parent proxy. Note that we'll be sending
2127 * the CFAIL message ourselves if connecting to the parent
2128 * fails, but we won't send a CSUCCEED message if it works,
2129 * since that would result in a double message (ours and the
2130 * parent's). After sending the request to the parent, we simply
2133 * here's the matrix:
2136 * +--------+--------+
2138 * 0 | create | connect|
2140 * Forwarding +--------+--------+
2142 * 1 | create | pass |
2144 * +--------+--------+
2149 * Check if a CONNECT request is allowable:
2150 * In the absence of a +limit-connect action, allow only port 443.
2151 * If there is an action, allow whatever matches the specificaton.
2155 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
2156 || (csp->action->flags & ACTION_LIMIT_CONNECT
2157 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
2159 if (csp->action->flags & ACTION_TREAT_FORBIDDEN_CONNECTS_LIKE_BLOCKS)
2162 * The response may confuse some clients,
2163 * but makes unblocking easier.
2165 log_error(LOG_LEVEL_ERROR, "Marking suspicious CONNECT request from %s for blocking.",
2167 csp->action->flags |= ACTION_BLOCK;
2172 write_socket(csp->cfd, CFORBIDDEN, strlen(CFORBIDDEN));
2173 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
2174 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
2176 list_remove_all(csp->headers);
2185 freez(csp->headers->first->str);
2186 build_request_line(csp, fwd, &csp->headers->first->str);
2189 hdr = list_to_text(csp->headers);
2192 /* FIXME Should handle error properly */
2193 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
2197 * We have a request. Check if one of the crunchers wants it.
2199 if (crunch_response_triggered(csp, crunchers_all))
2202 * Yes. The client got the crunch response
2203 * and we are done here after cleaning up.
2206 list_remove_all(csp->headers);
2212 * The headers can't be removed earlier because
2213 * they were still needed for the referrer check
2214 * in case of CGI crunches.
2216 * XXX: Would it be worth to move the referrer check
2217 * into client_referrer() and set a flag if it's trusted?
2219 list_remove_all(csp->headers);
2221 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
2223 if (fwd->forward_host)
2225 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
2226 fwd->forward_host, fwd->forward_port, http->hostport);
2230 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
2233 /* here we connect to the server, gateway, or the forwarder */
2235 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
2236 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
2238 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
2239 forwarded_connect_retries, http->hostport);
2242 if (csp->sfd == JB_INVALID_SOCKET)
2244 if (fwd->type != SOCKS_NONE)
2247 rsp = error_response(csp, "forwarding-failed", errno);
2249 else if (errno == EINVAL)
2251 rsp = error_response(csp, "no-such-domain", errno);
2255 rsp = error_response(csp, "connect-failed", errno);
2256 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
2261 /* Write the answer to the client */
2264 send_crunch_response(csp, rsp);
2271 if (fwd->forward_host || (http->ssl == 0))
2273 /* write the client's (modified) header to the server
2274 * (along with anything else that may be in the buffer)
2277 if (write_socket(csp->sfd, hdr, strlen(hdr))
2278 || (flush_socket(csp->sfd, csp) < 0))
2280 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
2283 rsp = error_response(csp, "connect-failed", errno);
2287 send_crunch_response(csp, rsp);
2297 * We're running an SSL tunnel and we're not forwarding,
2298 * so just send the "connect succeeded" message to the
2299 * client, flush the rest, and get out of the way.
2301 if (write_socket(csp->cfd, CSUCCEED, strlen(CSUCCEED)))
2309 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
2311 /* we're finished with the client's header */
2314 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
2316 /* pass data between the client and server
2317 * until one or the other shuts down the connection.
2326 * FD_ZERO here seems to point to an errant macro which crashes.
2327 * So do this by hand for now...
2329 memset(&rfds,0x00,sizeof(fd_set));
2333 FD_SET(csp->cfd, &rfds);
2334 FD_SET(csp->sfd, &rfds);
2336 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
2340 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
2344 /* this is the body of the browser's request
2345 * just read it and write it.
2348 if (FD_ISSET(csp->cfd, &rfds))
2350 len = read_socket(csp->cfd, buf, sizeof(buf) - 1);
2354 break; /* "game over, man" */
2357 if (write_socket(csp->sfd, buf, (size_t)len))
2359 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2366 * The server wants to talk. It could be the header or the body.
2367 * If `hdr' is null, then it's the header otherwise it's the body.
2368 * FIXME: Does `hdr' really mean `host'? No.
2372 if (FD_ISSET(csp->sfd, &rfds))
2375 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
2379 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
2381 if (http->ssl && (fwd->forward_host == NULL))
2384 * Just hang up. We already confirmed the client's CONNECT
2385 * request with status code 200 and unencrypted content is
2386 * no longer welcome.
2388 log_error(LOG_LEVEL_ERROR,
2389 "CONNECT already confirmed. Unable to tell the client about the problem.");
2393 rsp = error_response(csp, "connect-failed", errno);
2397 send_crunch_response(csp, rsp);
2403 /* Add a trailing zero. This lets filter_popups
2404 * use string operations.
2408 #ifdef FEATURE_KILL_POPUPS
2409 /* Filter the popups on this read. */
2410 if (block_popups_now)
2412 filter_popups(buf, csp);
2414 #endif /* def FEATURE_KILL_POPUPS */
2416 /* Normally, this would indicate that we've read
2417 * as much as the server has sent us and we can
2418 * close the client connection. However, Microsoft
2419 * in its wisdom has released IIS/5 with a bug that
2420 * prevents it from sending the trailing \r\n in
2421 * a 302 redirect header (and possibly other headers).
2422 * To work around this if we've haven't parsed
2423 * a full header we'll append a trailing \r\n
2424 * and see if this now generates a valid one.
2426 * This hack shouldn't have any impacts. If we've
2427 * already transmitted the header or if this is a
2428 * SSL connection, then we won't bother with this
2429 * hack. So we only work on partially received
2430 * headers. If we append a \r\n and this still
2431 * doesn't generate a valid header, then we won't
2432 * transmit anything to the client.
2437 if (server_body || http->ssl)
2440 * If we have been buffering up the document,
2441 * now is the time to apply content modification
2442 * and send the result to the client.
2447 * If the content filter fails, use the original
2448 * buffer and length.
2449 * (see p != NULL ? p : csp->iob->cur below)
2451 if (NULL == (p = (*content_filter)(csp)))
2453 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
2456 if (JB_ERR_OK != sed(server_patterns_light, NULL, csp))
2458 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
2461 hdr = list_to_text(csp->headers);
2464 /* FIXME Should handle error properly */
2465 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2469 * Shouldn't happen because this was the second sed run
2470 * and tags are only created for the first one.
2472 assert(!crunch_response_triggered(csp, crunchers_all));
2474 if (write_socket(csp->cfd, hdr, strlen(hdr))
2475 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
2477 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
2487 break; /* "game over, man" */
2491 * This is NOT the body, so
2492 * Let's pretend the server just sent us a blank line.
2494 snprintf(buf, sizeof(buf), "\r\n");
2495 len = (int)strlen(buf);
2498 * Now, let the normal header parsing algorithm below do its
2499 * job. If it fails, we'll exit instead of continuing.
2506 * If this is an SSL connection or we're in the body
2507 * of the server document, just write it to the client,
2508 * unless we need to buffer the body for later content-filtering
2511 if (server_body || http->ssl)
2516 * If there is no memory left for buffering the content, or the buffer limit
2517 * has been reached, switch to non-filtering mode, i.e. make & write the
2518 * header, flush the iob and buf, and get out of the way.
2520 if (add_to_iob(csp, buf, len))
2525 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
2526 if (JB_ERR_OK != sed(server_patterns, add_server_headers, csp))
2528 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
2530 hdr = list_to_text(csp->headers);
2534 * Memory is too tight to even generate the header.
2535 * Send our static "Out-of-memory" page.
2537 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2538 rsp = cgi_error_memory();
2539 send_crunch_response(csp, rsp);
2544 if (crunch_response_triggered(csp, crunchers_light))
2547 * One of the tags created by a server-header
2548 * tagger triggered a crunch. We already
2549 * delivered the crunch response to the client
2550 * and are done here after cleaning up.
2556 hdrlen = strlen(hdr);
2558 if (write_socket(csp->cfd, hdr, hdrlen)
2559 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
2560 || (write_socket(csp->cfd, buf, (size_t)len)))
2562 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
2568 byte_count += hdrlen + (size_t)flushed + (size_t)len;
2570 content_filter = NULL;
2577 if (write_socket(csp->cfd, buf, (size_t)len))
2579 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2583 byte_count += (size_t)len;
2588 /* we're still looking for the end of the
2589 * server's header ... (does that make header
2590 * parsing an "out of body experience" ?
2594 * buffer up the data we just read. If that fails,
2595 * there's little we can do but send our static
2596 * out-of-memory page.
2598 if (add_to_iob(csp, buf, len))
2600 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2601 rsp = cgi_error_memory();
2602 send_crunch_response(csp, rsp);
2607 /* Convert iob into something sed() can digest */
2608 if (JB_ERR_PARSE == get_server_headers(csp))
2612 /* Well, we tried our MS IIS/5
2613 * hack and it didn't work.
2614 * The header is incomplete
2615 * and there isn't anything
2616 * we can do about it.
2622 /* Since we have to wait for
2623 * more from the server before
2624 * we can parse the headers
2625 * we just continue here.
2631 /* Did we actually get anything? */
2632 if (NULL == csp->headers->first)
2634 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
2635 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2636 write_socket(csp->cfd, NO_SERVER_DATA_RESPONSE, strlen(NO_SERVER_DATA_RESPONSE));
2637 free_http_request(http);
2641 /* we have now received the entire header.
2642 * filter it and send the result to the client
2644 if (JB_ERR_OK != sed(server_patterns, add_server_headers, csp))
2646 log_error(LOG_LEVEL_FATAL, "Failed to parse server headers.");
2648 hdr = list_to_text(csp->headers);
2651 /* FIXME Should handle error properly */
2652 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2655 if (crunch_response_triggered(csp, crunchers_light))
2658 * One of the tags created by a server-header
2659 * tagger triggered a crunch. We already
2660 * delivered the crunch response to the client
2661 * and are done here after cleaning up.
2666 /* Buffer and pcrs filter this if appropriate. */
2668 if (!http->ssl) /* We talk plaintext */
2671 #ifdef FEATURE_KILL_POPUPS
2672 /* Start blocking popups if appropriate. */
2673 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
2674 (csp->action->flags & ACTION_NO_POPUPS) != 0) /* Policy allows */
2676 block_popups_now = 1;
2678 * Filter the part of the body that came in the same read
2679 * as the last headers:
2681 filter_popups(csp->iob->cur, csp);
2683 #endif /* def FEATURE_KILL_POPUPS */
2684 content_filter = get_filter_function(csp);
2687 * Only write if we're not buffering for content modification
2689 if (!content_filter)
2691 /* write the server's (modified) header to
2692 * the client (along with anything else that
2693 * may be in the buffer)
2696 if (write_socket(csp->cfd, hdr, strlen(hdr))
2697 || ((len = flush_socket(csp->cfd, csp)) < 0))
2699 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
2701 /* the write failed, so don't bother
2702 * mentioning it to the client...
2703 * it probably can't hear us anyway.
2709 byte_count += (size_t)len;
2712 /* we're finished with the server's header */
2717 /* If this was a MS IIS/5 hack then it means
2718 * the server has already closed the
2719 * connection. Nothing more to read. Time
2730 return; /* huh? we should never get here */
2733 if (csp->content_length == 0)
2736 * If Privoxy didn't recalculate the
2737 * Content-Lenght, byte_count is still
2740 csp->content_length = byte_count;
2743 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
2744 csp->ip_addr_str, http->ocmd, csp->content_length);
2748 /*********************************************************************
2752 * Description : This is little more than chat. We only "serve" to
2753 * to close any socket that chat may have opened.
2756 * 1 : csp = Current client state (buffers, headers, etc...)
2760 *********************************************************************/
2762 void serve(struct client_state *csp)
2763 #else /* ifndef AMIGA */
2764 static void serve(struct client_state *csp)
2765 #endif /* def AMIGA */
2768 close_socket(csp->cfd);
2770 if (csp->sfd != JB_INVALID_SOCKET)
2772 close_socket(csp->sfd);
2775 csp->flags &= ~CSP_FLAG_ACTIVE;
2781 /*********************************************************************
2783 * Function : server_thread
2785 * Description : We only exist to call `serve' in a threaded environment.
2788 * 1 : data = Current client state (buffers, headers, etc...)
2790 * Returns : Always 0.
2792 *********************************************************************/
2793 static int32 server_thread(void *data)
2795 serve((struct client_state *) data);
2802 /*********************************************************************
2806 * Description : Print usage info & exit.
2808 * Parameters : Pointer to argv[0] for identifying ourselves
2812 *********************************************************************/
2813 void usage(const char *myname)
2815 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
2819 #endif /* defined(unix) */
2822 "[--no-daemon] [--pidfile pidfile] [--user user[.group]] "
2823 #endif /* defined(unix) */
2824 "[--version] [configfile]\n"
2825 "Aborting\n", myname);
2832 /*********************************************************************
2834 * Function : initialize_mutexes
2836 * Description : Prepares mutexes if mutex support is available.
2840 * Returns : Void, exits in case of errors.
2842 *********************************************************************/
2843 void initialize_mutexes()
2847 #ifdef FEATURE_PTHREAD
2849 * Prepare global mutex semaphores
2851 err = pthread_mutex_init(&log_mutex, 0);
2853 if (!err) err = pthread_mutex_init(&log_init_mutex, 0);
2856 * XXX: The assumptions below are a bit naive
2857 * and can cause locks that aren't necessary.
2859 * For example older FreeBSD versions (< 6.x?)
2860 * have no gethostbyname_r, but gethostbyname is
2863 #if !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R)
2864 if (!err) err = pthread_mutex_init(&resolver_mutex, 0);
2865 #endif /* !defined(HAVE_GETHOSTBYADDR_R) || !defined(HAVE_GETHOSTBYNAME_R) */
2867 * XXX: should we use a single mutex for
2868 * localtime() and gmtime() as well?
2870 #ifndef HAVE_GMTIME_R
2871 if (!err) err = pthread_mutex_init(&gmtime_mutex, 0);
2872 #endif /* ndef HAVE_GMTIME_R */
2874 #ifndef HAVE_LOCALTIME_R
2875 if (!err) err = pthread_mutex_init(&localtime_mutex, 0);
2876 #endif /* ndef HAVE_GMTIME_R */
2879 if (!err) err = pthread_mutex_init(&rand_mutex, 0);
2880 #endif /* ndef HAVE_RANDOM */
2881 #endif /* FEATURE_PTHREAD */
2884 * TODO: mutex support for mingw32 would be swell.
2889 printf("Fatal error. Mutex initialization failed: %s.\n",
2898 /*********************************************************************
2902 * Description : Load the config file and start the listen loop.
2903 * This function is a lot more *sane* with the `load_config'
2904 * and `listen_loop' functions; although it stills does
2905 * a *little* too much for my taste.
2908 * 1 : argc = Number of parameters (including $0).
2909 * 2 : argv = Array of (char *)'s to the parameters.
2911 * Returns : 1 if : can't open config file, unrecognized directive,
2912 * stats requested in multi-thread mode, can't open the
2913 * log file, can't open the jar file, listen port is invalid,
2914 * any load fails, and can't bind port.
2916 * Else main never returns, the process must be signaled
2917 * to terminate execution. Or, on Windows, use the
2918 * "File", "Exit" menu option.
2920 *********************************************************************/
2922 int real_main(int argc, const char *argv[])
2924 int main(int argc, const char *argv[])
2928 unsigned int random_seed;
2930 struct passwd *pw = NULL;
2931 struct group *grp = NULL;
2940 #if !defined(_WIN32)
2948 * Parse the command line arguments
2950 * XXX: simply printing usage information in case of
2951 * invalid arguments isn't particular user friendly.
2953 while (++argc_pos < argc)
2956 /* Check to see if the service must be installed or uninstalled */
2957 if (strncmp(argv[argc_pos], "--install", 9) == 0)
2959 const char *pName = argv[argc_pos] + 9;
2962 exit( (install_service(pName)) ? 0 : 1 );
2964 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
2966 const char *pName = argv[argc_pos] + 11;
2969 exit((uninstall_service(pName)) ? 0 : 1);
2971 else if (strcmp(argv[argc_pos], "--service" ) == 0)
2973 bRunAsService = TRUE;
2974 w32_set_service_cwd();
2975 atexit(w32_service_exit_notify);
2978 #endif /* defined(_WIN32) */
2981 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2983 if (strcmp(argv[argc_pos], "--help") == 0)
2988 else if(strcmp(argv[argc_pos], "--version") == 0)
2990 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
2996 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
3001 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
3003 if (++argc_pos == argc) usage(argv[0]);
3004 pidfile = strdup(argv[argc_pos]);
3007 else if (strcmp(argv[argc_pos], "--user" ) == 0)
3009 if (++argc_pos == argc) usage(argv[argc_pos]);
3011 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
3014 if (NULL == (grp = getgrnam(p)))
3016 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
3020 if (NULL == (pw = getpwnam(argv[argc_pos])))
3022 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
3025 if (p != NULL) *--p = '\0';
3028 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
3032 #endif /* defined(unix) */
3034 else if (argc_pos + 1 != argc)
3037 * This is neither the last command line
3038 * option, nor was it recognized before,
3039 * therefore it must be invalid.
3045 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
3047 configfile = argv[argc_pos];
3050 } /* -END- while (more arguments) */
3053 if ( *configfile != '/' )
3055 char cwd[BUFFER_SIZE];
3057 size_t abs_file_size;
3059 /* make config-filename absolute here */
3060 if (NULL == getcwd(cwd, sizeof(cwd)))
3062 perror("failed to get current working directory");
3067 abs_file_size = strlen(cwd) + strlen(configfile) + 5;
3068 basedir = strdup(cwd);
3070 if (NULL == basedir ||
3071 NULL == (abs_file = malloc(abs_file_size)))
3073 perror("malloc failed");
3076 strlcpy(abs_file, basedir, abs_file_size);
3077 strlcat(abs_file, "/", abs_file_size );
3078 strlcat(abs_file, configfile, abs_file_size);
3079 configfile = abs_file;
3081 #endif /* defined unix */
3085 clients->next = NULL;
3089 #elif defined(_WIN32)
3093 /* Prepare mutexes if supported and necessary. */
3094 initialize_mutexes();
3096 random_seed = (unsigned int)time(NULL);
3098 srandom(random_seed);
3101 #endif /* ifdef HAVE_RANDOM */
3104 * Unix signal handling
3106 * Catch the abort, interrupt and terminate signals for a graceful exit
3107 * Catch the hangup signal so the errlog can be reopened.
3108 * Ignore the broken pipe signals (FIXME: Why?)
3110 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
3113 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
3114 const int ignored_signals[] = { SIGPIPE, 0 };
3116 for (idx = 0; catched_signals[idx] != 0; idx++)
3118 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
3119 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
3121 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
3122 #endif /* ifdef sun */
3124 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
3128 for (idx = 0; ignored_signals[idx] != 0; idx++)
3130 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
3132 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
3137 #else /* ifdef _WIN32 */
3138 # ifdef _WIN_CONSOLE
3140 * We *are* in a windows console app.
3141 * Print a verbose messages about FAQ's and such
3143 printf("%s", win32_blurb);
3144 # endif /* def _WIN_CONSOLE */
3145 #endif /* def _WIN32 */
3148 /* Initialize the CGI subsystem */
3149 cgi_init_error_messages();
3152 * If runnig on unix and without the --nodaemon
3153 * option, become a daemon. I.e. fork, detach
3154 * from tty and get process group leadership
3167 if ( pid < 0 ) /* error */
3172 else if ( pid != 0 ) /* parent */
3177 * must check for errors
3178 * child died due to missing files aso
3181 wpid = waitpid( pid, &status, WNOHANG );
3190 /* Should be more portable, but not as well tested */
3195 #else /* ndef __FreeBSD__ */
3197 #endif /* ndef __FreeBSD__ */
3198 fd = open("/dev/tty", O_RDONLY);
3201 /* no error check here */
3202 ioctl( fd, TIOCNOTTY,0 );
3206 /* FIXME: should close stderr (fd 2) here too, but the test
3208 * and load config file is done in listen_loop() and puts
3209 * some messages on stderr there.
3216 } /* -END- if (!no_daemon) */
3219 * As soon as we have written the PID file, we can switch
3220 * to the user and group ID indicated by the --user option
3226 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
3228 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
3234 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
3236 if (chroot(pw->pw_dir) < 0)
3238 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
3242 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
3245 if (setuid(pw->pw_uid))
3247 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
3251 char putenv_dummy[64];
3253 strlcpy(putenv_dummy, "HOME=/", sizeof(putenv_dummy));
3254 if (putenv(putenv_dummy) != 0)
3256 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
3259 snprintf(putenv_dummy, sizeof(putenv_dummy), "USER=%s", pw->pw_name);
3260 if (putenv(putenv_dummy) != 0)
3262 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
3268 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
3271 #endif /* defined unix */
3274 /* This will be FALSE unless the command line specified --service
3278 /* Yup, so now we must attempt to establish a connection
3279 * with the service dispatcher. This will only work if this
3280 * process was launched by the service control manager to
3281 * actually run as a service. If this isn't the case, i've
3282 * known it take around 30 seconds or so for the call to return.
3285 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
3286 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
3288 /* Service has run, and at this point is now being stopped, so just return */
3293 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
3295 /* An error occurred. Usually it's because --service was wrongly specified
3296 * and we were unable to connect to the Service Control Dispatcher because
3297 * it wasn't expecting us and is therefore not listening.
3299 * For now, just continue below to call the listen_loop function.
3302 #endif /* def _WIN32 */
3312 /*********************************************************************
3314 * Function : bind_port_helper
3316 * Description : Bind the listen port. Handles logging, and aborts
3320 * 1 : config = Privoxy configuration. Specifies port
3323 * Returns : Port that was opened.
3325 *********************************************************************/
3326 static jb_socket bind_port_helper(struct configuration_spec * config)
3331 if ( (config->haddr != NULL)
3332 && (config->haddr[0] == '1')
3333 && (config->haddr[1] == '2')
3334 && (config->haddr[2] == '7')
3335 && (config->haddr[3] == '.') )
3337 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
3340 else if (config->haddr == NULL)
3342 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
3347 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
3348 config->hport, config->haddr);
3351 result = bind_port(config->haddr, config->hport, &bfd);
3358 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3359 "There may be another Privoxy or some other "
3360 "proxy running on port %d",
3361 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
3362 config->hport, config->hport);
3365 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
3366 "The hostname is not resolvable",
3367 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3370 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
3371 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
3374 /* shouldn't get here */
3375 return JB_INVALID_SOCKET;
3378 config->need_bind = 0;
3385 /* Without this simple workaround we get this compiler warning from _beginthread
3386 * warning C4028: formal parameter 1 different from declaration
3388 void w32_service_listen_loop(void *p)
3392 #endif /* def _WIN32 */
3395 /*********************************************************************
3397 * Function : listen_loop
3399 * Description : bind the listen port and enter a "FOREVER" listening loop.
3405 *********************************************************************/
3406 static void listen_loop(void)
3408 struct client_state *csp = NULL;
3410 struct configuration_spec * config;
3412 config = load_config();
3414 bfd = bind_port_helper(config);
3416 #ifdef FEATURE_GRACEFUL_TERMINATION
3417 while (!g_terminate)
3422 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
3423 while (waitpid(-1, NULL, WNOHANG) > 0)
3425 /* zombie children */
3427 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
3430 * Free data that was used by died threads
3436 * Re-open the errlog after HUP signal
3438 if (received_hup_signal)
3440 init_error_log(Argv[0], config->logfile, config->debug);
3441 received_hup_signal = 0;
3446 #ifdef FEATURE_COOKIE_JAR
3448 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
3449 * already open. I think unload_configfile() is not being run, which should do
3450 * this work. Until that can get resolved, we'll use this workaround.
3454 if (csp->config->jar)
3456 fclose(csp->config->jar);
3457 csp->config->jar = NULL;
3459 #endif /* FEATURE_COOKIE_JAR */
3460 #endif /* __OS2__ */
3462 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
3464 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
3468 csp->flags |= CSP_FLAG_ACTIVE;
3469 csp->sfd = JB_INVALID_SOCKET;
3471 csp->config = config = load_config();
3473 if ( config->need_bind )
3476 * Since we were listening to the "old port", we will not see
3477 * a "listen" param change until the next IJB request. So, at
3478 * least 1 more request must be made for us to find the new
3479 * setting. I am simply closing the old socket and binding the
3482 * Which-ever is correct, we will serve 1 more page via the
3483 * old settings. This should probably be a "show-proxy-args"
3484 * request. This should not be a so common of an operation
3485 * that this will hurt people's feelings.
3490 bfd = bind_port_helper(config);
3493 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
3495 if (!accept_connection(csp, bfd))
3497 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
3510 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
3513 #ifdef FEATURE_TOGGLE
3514 if (global_toggle_state)
3516 csp->flags |= CSP_FLAG_TOGGLED_ON;
3518 #endif /* def FEATURE_TOGGLE */
3520 if (run_loader(csp))
3522 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
3523 /* Never get here - LOG_LEVEL_FATAL causes program exit */
3527 if (block_acl(NULL,csp))
3529 log_error(LOG_LEVEL_CONNECT, "Connection from %s dropped due to ACL", csp->ip_addr_str);
3530 close_socket(csp->cfd);
3534 #endif /* def FEATURE_ACL */
3536 /* add it to the list of clients */
3537 csp->next = clients->next;
3538 clients->next = csp;
3540 if (config->multi_threaded)
3544 /* this is a switch () statment in the C preprocessor - ugh */
3545 #undef SELECTED_ONE_OPTION
3547 /* Use Pthreads in preference to native code */
3548 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
3549 #define SELECTED_ONE_OPTION
3551 pthread_t the_thread;
3552 pthread_attr_t attrs;
3554 pthread_attr_init(&attrs);
3555 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
3556 errno = pthread_create(&the_thread, &attrs,
3557 (void * (*)(void *))serve, csp);
3558 child_id = errno ? -1 : 0;
3559 pthread_attr_destroy(&attrs);
3563 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
3564 #define SELECTED_ONE_OPTION
3565 child_id = _beginthread(
3566 (void (*)(void *))serve,
3571 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
3572 #define SELECTED_ONE_OPTION
3573 child_id = _beginthread(
3574 (void(* _Optlink)(void*))serve,
3580 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
3581 #define SELECTED_ONE_OPTION
3583 thread_id tid = spawn_thread
3584 (server_thread, "server", B_NORMAL_PRIORITY, csp);
3586 if ((tid >= 0) && (resume_thread(tid) == B_OK))
3588 child_id = (int) tid;
3597 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
3598 #define SELECTED_ONE_OPTION
3599 csp->cfd = ReleaseSocket(csp->cfd, -1);
3602 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3603 NP_Output, Output(),
3604 NP_CloseOutput, FALSE,
3605 NP_Name, (ULONG)"privoxy child",
3609 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3610 NP_Output, Output(),
3611 NP_CloseOutput, FALSE,
3612 NP_Name, (ULONG)"privoxy child",
3613 NP_StackSize, 200*1024,
3619 ((struct Task *)child_id)->tc_UserData = csp;
3620 Signal((struct Task *)child_id, SIGF_SINGLE);
3625 #if !defined(SELECTED_ONE_OPTION)
3628 /* This block is only needed when using fork().
3629 * When using threads, the server thread was
3630 * created and run by the call to _beginthread().
3632 if (child_id == 0) /* child */
3635 #ifdef FEATURE_TOGGLE
3636 int inherited_toggle_state = global_toggle_state;
3637 #endif /* def FEATURE_TOGGLE */
3642 * If we've been toggled or we've blocked the request, tell Mom
3645 #ifdef FEATURE_TOGGLE
3646 if (inherited_toggle_state != global_toggle_state)
3648 rc |= RC_FLAG_TOGGLED;
3650 #endif /* def FEATURE_TOGGLE */
3652 #ifdef FEATURE_STATISTICS
3653 if (csp->flags & CSP_FLAG_REJECTED)
3655 rc |= RC_FLAG_BLOCKED;
3657 #endif /* ndef FEATURE_STATISTICS */
3661 else if (child_id > 0) /* parent */
3663 /* in a fork()'d environment, the parent's
3664 * copy of the client socket and the CSP
3668 #if !defined(_WIN32) && !defined(__CYGWIN__)
3670 wait( &child_status );
3673 * Evaluate child's return code: If the child has
3674 * - been toggled, toggle ourselves
3675 * - blocked its request, bump up the stats counter
3678 #ifdef FEATURE_TOGGLE
3679 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
3681 global_toggle_state = !global_toggle_state;
3683 #endif /* def FEATURE_TOGGLE */
3685 #ifdef FEATURE_STATISTICS
3687 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
3691 #endif /* def FEATURE_STATISTICS */
3693 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
3694 close_socket(csp->cfd);
3695 csp->flags &= ~CSP_FLAG_ACTIVE;
3699 #undef SELECTED_ONE_OPTION
3700 /* end of cpp switch () */
3702 if (child_id < 0) /* failed */
3704 char buf[BUFFER_SIZE];
3706 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
3708 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
3710 write_socket(csp->cfd, buf, strlen(buf));
3711 close_socket(csp->cfd);
3712 csp->flags &= ~CSP_FLAG_ACTIVE;
3723 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
3725 /* Clean up. Aim: free all memory (no leaks) */
3726 #ifdef FEATURE_GRACEFUL_TERMINATION
3728 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
3730 unload_current_config_file();
3731 unload_current_actions_file();
3732 unload_current_re_filterfile();
3733 #ifdef FEATURE_TRUST
3734 unload_current_trust_file();
3737 if (config->multi_threaded)
3744 } while ((clients->next != NULL) && (--i > 0));
3748 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
3759 #ifdef FEATURE_COOKIE_JAR
3760 if (NULL != config->jar)
3762 fclose(config->jar);
3766 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
3767 /* Cleanup - remove taskbar icon etc. */
3772 #endif /* FEATURE_GRACEFUL_TERMINATION */