1 const char jcc_rcs[] = "$Id: jcc.c,v 1.119 2007/01/25 14:02:30 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 1.119 2007/01/25 14:02:30 fabiankeil
37 * - Add Proxy-Agent header to HTTP snippets that are
38 * supposed to reach HTTP clients only.
39 * - Made a few CONNECT log messages more descriptive.
40 * - Catch completely empty server responses (as seen
41 * with Tor's fake ".noconnect" top level domain).
42 * - Use shiny new "forwarding-failed" template for socks errors.
44 * Revision 1.118 2007/01/07 07:43:43 joergs
45 * AmigaOS4 support added.
47 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
48 * Added config option accept-intercepted-requests
49 * and disabled it by default.
51 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
52 * Reverted parts of my last commit
53 * to keep error handling working.
55 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
56 * Fixed gcc43 conversion warnings.
58 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
59 * Fix -pedantic ISO C warning about converting
60 * from function pointer to object pointer.
62 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
63 * Silence compiler warning I introduced with my last commit.
65 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
66 * Mutex protect rand() if POSIX threading
67 * is used, warn the user if that's not possible
68 * and stop using it on _WIN32 where it could
71 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
72 * Don't prevent core dumps by catching SIGABRT.
73 * It's rude and makes debugging unreasonable painful.
75 * Revision 1.110 2006/12/13 14:52:53 etresoft
76 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
78 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
79 * Privoxy is now able to run as intercepting
80 * proxy in combination with any packet filter
81 * that does the port redirection. The destination
82 * is extracted from the "Host:" header which
83 * should be available for nearly all requests.
85 * Moved HTTP snipplets into jcc.c.
86 * Added error message for gopher proxy requests.
88 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
89 * Only unlink the pidfile if it's actually used.
91 * Change order of interception checks to make
92 * it possible to block or redirect requests for
95 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
96 * Make pthread mutex locking more generic. Instead of
97 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
98 * and use mutex locking unless there is an _r function
99 * available. Better safe than sorry.
101 * Fixes "./configure --disable-pthread" and should result
102 * in less threading-related problems on pthread-using platforms,
103 * but it still doesn't fix BR#1122404.
105 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
106 * Move pthread.h inclusion from jcc.c to jcc.h.
107 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
109 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
110 * Don't exit after receiving the second SIGHUP on Solaris.
112 * Fixes BR 1052235, but the same problem may exist on other
113 * systems. Once 3.0.6 is out we should use sigset()
114 * where available and see if it breaks anything.
116 * Revision 1.104 2006/09/23 13:26:38 roro
117 * Replace TABs by spaces in source code.
119 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
120 * Fix +redirect{}. Didn't work with -fast-redirects.
122 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
123 * Respond with 400 and a short text message
124 * if the client tries to use Privoxy as FTP proxy.
126 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
127 * Make number of retries in case of forwarded-connect problems
128 * a config file option (forwarded-connect-retries) and use 0 as
131 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
132 * Set random(3) seed.
134 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
135 * Follow the OpenBSD port's lead and protect the resolve
136 * functions on OpenBSD as well.
138 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
139 * --user fix. Only use the user as group if no group is specified.
140 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
142 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
143 * Windows service (re-)integration
147 * --install[:service_name]
148 * --uninstall[:service_name]
151 * They work as follows:
152 * --install will create a service for you and then terminate.
153 * By default the service name will be "privoxy" (without the quotes).
154 * However you can run multiple services if you wish, just by adding
155 * a colon and then a name (no spaces).
157 * --uninstall follows the exact same rules a --install.
159 * --service is used when the program is executed by the service
160 * control manager, and in normal circumstances would never be
161 * used as a command line argument.
163 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
164 * Windows service integration
166 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
167 * Incorporate Fabian Keil's patch work:
168 http://www.fabiankeil.de/sourcecode/privoxy/
170 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
171 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
172 * with what was really the latest development (the v_3_0_branch branch)
174 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
175 * Thanks to Jindrich Makovicka for a race condition fix for the log
176 * file. The race condition remains for non-pthread implementations.
177 * Reference patch #1175720.
179 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
180 * Add the ability to check jpeg images for invalid
181 * lengths of comment blocks. Defensive strategy
182 * against the exploit:
183 * Microsoft Security Bulletin MS04-028
184 * Buffer Overrun in JPEG Processing (GDI+) Could
185 * Allow Code Execution (833987)
186 * Enabled with +inspect-jpegs in actions files.
188 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
189 * - Fixed usage info for non-unix platforms
190 * - Fixed small cmdline parsing bug
192 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
193 * Diagnostics: Now preserve the returncode of pthread_create
194 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
196 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
197 * No longer ignore SIGCHLD. Fixes bug #769381
199 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
200 * Close jarfile on graceful exit, remove stray line
202 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
203 * Cosmetics: Killed a warning, a typo and an allocation left at exit
205 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
206 * No longer rely on non-POSIX.1 extensions of getcwd().
209 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
210 * Replaced setenv() by posix-compliant putenv()
211 * Thanks to Neil McCalden (nmcc AT users.sf.net).
213 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
214 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
216 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
217 * Clean-up and extension of improvements for forked mode:
218 * - Child's return code now consists of flags RC_FLAG_*
219 * - Reporting toggle to parent now properly #ifdef'ed
220 * - Children now report blocking to parent. This enables
221 * statistics in forked mode
223 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
224 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
225 * Children now report having been toggled through _exit(17), parents
226 * watch for that code and toggle themselves if found.
228 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
229 * Wrapping all *_r functions (the non-_r versions of them) with
230 * mutex semaphores for OSX. Hopefully this will take care of all
231 * of those pesky crash reports.
233 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
234 * Fixed two mostly harmless mem leaks
236 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
237 * Fix: Head of global clients list now initialized to NULL
239 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
240 * Added basic support for OPTIONS and TRACE HTTP methods:
241 * - New interceptor direct_response() added in chat().
242 * - sed() moved to earlier in the process, so that the
243 * Host: header is evaluated before actions and forwarding
246 * Revision 1.92 2002/05/08 16:00:46 oes
247 * Chat's buffer handling:
248 * - Fixed bug with unchecked out-of-mem conditions
249 * while reading client request & server headers
250 * - No longer predict if the buffer limit will be exceeded
251 * in the next read -- check add_to_iob's new
252 * return code. If buffer couldn't be extended
253 * (policy or out-of-mem) while
254 * - reading from client: abort
255 * - reading server headers: send error page
256 * - buffering server body for filter: flush,
257 * and if that fails: send error page
259 * Revision 1.91 2002/04/08 20:35:58 swa
262 * Revision 1.90 2002/04/02 14:57:28 oes
263 * Made sending wafers independent of FEATURE_COOKIE_JAR
265 * Revision 1.89 2002/03/31 17:18:59 jongfoster
266 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
268 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
269 * More compiler warning message maintenance
271 * Revision 1.87 2002/03/26 22:29:54 swa
272 * we have a new homepage!
274 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
275 * Workaround for closing the jarfile before load_config() comes around again
277 * Revision 1.85 2002/03/24 15:23:33 jongfoster
280 * Revision 1.84 2002/03/24 13:25:43 swa
281 * name change related issues
283 * Revision 1.83 2002/03/16 23:54:06 jongfoster
284 * Adding graceful termination feature, to help look for memory leaks.
285 * If you enable this (which, by design, has to be done by hand
286 * editing config.h) and then go to http://i.j.b/die, then the program
287 * will exit cleanly after the *next* request. It should free all the
288 * memory that was used.
290 * Revision 1.82 2002/03/13 00:27:05 jongfoster
293 * Revision 1.81 2002/03/12 01:42:50 oes
294 * Introduced modular filters
296 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
297 * OS/2 port maintenance:
298 * - Fixed EMX build - it had decayed a little
299 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
300 * substituted a memset for now.
302 * Revision 1.79 2002/03/09 20:03:52 jongfoster
303 * - Making various functions return int rather than size_t.
304 * (Undoing a recent change). Since size_t is unsigned on
305 * Windows, functions like read_socket that return -1 on
306 * error cannot return a size_t.
308 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
309 * crashes, and also frequently caused JB to jump to 100%
310 * CPU and stay there. (Because it thought it had just
311 * read ((unsigned)-1) == 4Gb of data...)
313 * - The signature of write_socket has changed, it now simply
314 * returns success=0/failure=nonzero.
316 * - Trying to get rid of a few warnings --with-debug on
317 * Windows, I've introduced a new type "jb_socket". This is
318 * used for the socket file descriptors. On Windows, this
319 * is SOCKET (a typedef for unsigned). Everywhere else, it's
320 * an int. The error value can't be -1 any more, so it's
321 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
322 * Windows it maps to the #define INVALID_SOCKET.)
324 * - The signature of bind_port has changed.
326 * Revision 1.78 2002/03/08 21:35:04 oes
327 * Added optional group supplement to --user option. Will now use default group of user if no group given
329 * Revision 1.77 2002/03/07 03:52:06 oes
330 * - Fixed compiler warnings etc
331 * - Improved handling of failed DNS lookups
333 * Revision 1.76 2002/03/06 22:54:35 jongfoster
334 * Automated function-comment nitpicking.
336 * Revision 1.75 2002/03/06 10:02:19 oes
337 * Fixed stupid bug when --user was not given
339 * Revision 1.74 2002/03/06 00:49:31 jongfoster
340 * Fixing warning on Windows
341 * Making #ifdefs that refer to the same variable consistently
342 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
344 * Revision 1.73 2002/03/05 23:57:30 hal9
345 * Stray character 's' on line 1618 was breaking build.
347 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
348 * - Re-enable OS/2 building after new parms were added
349 * - Fix false out of memory report when resolving CGI templates when no IP
350 * address is available of failed attempt (a la no such domain)
352 * Revision 1.71 2002/03/05 18:13:56 oes
353 * Added --user option
355 * Revision 1.70 2002/03/05 04:52:42 oes
356 * Deleted non-errlog debugging code
358 * Revision 1.69 2002/03/04 23:50:00 jongfoster
359 * Splitting off bind_port() call into bind_port_helper(), with
362 * Revision 1.68 2002/03/04 20:17:32 oes
365 * Revision 1.67 2002/03/04 18:18:57 oes
366 * - Removed _DEBUG mode
367 * - Cleand up cmdline parsing
368 * - Introduced --no-daemon, --pidfile options
369 * - Cleaned up signal handling:
370 * - Terminate cleanly on INT, TERM and ABRT
371 * - Schedule logfile for re-opening on HUP
372 * - Ignore CHLD and PIPE
373 * - Leave the rest with their default handlers
374 * - Uniform handler registration
375 * - Added usage() function
376 * - Played styleguide police
378 * Revision 1.66 2002/03/03 15:06:55 oes
379 * Re-enabled automatic config reloading
381 * Revision 1.65 2002/03/03 14:49:11 oes
382 * Fixed CLF logging: Now uses client's original HTTP request
384 * Revision 1.64 2002/03/03 09:18:03 joergs
385 * Made jumbjuster work on AmigaOS again.
387 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
388 * Clean up a little CRLF unpleasantness that suddenly appeared
390 * Revision 1.62 2002/02/20 23:17:23 jongfoster
391 * Detecting some out-of memory conditions and exiting with a log message.
393 * Revision 1.61 2002/01/17 21:01:52 jongfoster
394 * Moving all our URL and URL pattern parsing code to urlmatch.c.
396 * Revision 1.60 2001/12/30 14:07:32 steudten
397 * - Add signal handling (unix)
398 * - Add SIGHUP handler (unix)
399 * - Add creation of pidfile (unix)
400 * - Add action 'top' in rc file (RH)
401 * - Add entry 'SIGNALS' to manpage
402 * - Add exit message to logfile (unix)
404 * Revision 1.59 2001/12/13 14:07:18 oes
405 * Fixed Bug: 503 error page now sent OK
407 * Revision 1.58 2001/11/30 23:37:24 jongfoster
408 * Renaming the Win32 config file to config.txt - this is almost the
409 * same as the corresponding UNIX name "config"
411 * Revision 1.57 2001/11/16 00:47:43 jongfoster
412 * Changing the tty-disconnection code to use setsid().
414 * Revision 1.56 2001/11/13 20:20:54 jongfoster
415 * Tabs->spaces, fixing a bug with missing {} around an if()
417 * Revision 1.55 2001/11/13 20:14:53 jongfoster
418 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
420 * Revision 1.54 2001/11/07 00:03:14 steudten
421 * Give reliable return value if an error
422 * occurs not just 0 with new daemon mode.
424 * Revision 1.53 2001/11/05 21:41:43 steudten
425 * Add changes to be a real daemon just for unix os.
426 * (change cwd to /, detach from controlling tty, set
427 * process group and session leader to the own process.
429 * Add some fatal-error log message for failed malloc().
430 * Add '-d' if compiled with 'configure --with-debug' to
431 * enable debug output.
433 * Revision 1.52 2001/10/26 20:11:20 jongfoster
434 * Fixing type mismatch
436 * Revision 1.51 2001/10/26 17:38:28 oes
439 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
440 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
441 * threads to call select() simultaneously. So, it's time to do a real, live,
442 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
443 * (native). Both versions will work, but using __OS2__ offers multi-threading.
445 * Revision 1.49 2001/10/23 21:41:35 jongfoster
446 * Added call to initialize the (statically-allocated of course)
447 * "out of memory" CGI response.
449 * Revision 1.48 2001/10/10 19:56:46 jongfoster
450 * Moving some code that wasn't cookie-related out of an #ifdef
453 * Revision 1.47 2001/10/10 16:44:36 oes
454 * Added CONNECT destination port limitation check
456 * Revision 1.46 2001/10/08 15:17:41 oes
457 * Re-enabled SSL forwarding
459 * Revision 1.45 2001/10/07 15:42:11 oes
460 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
462 * Moved downgrading of the HTTP version from parse_http_request to
463 * chat(), since we can't decide if it is necessary before we have
464 * determined the actions for the URL. The HTTP command is now
465 * *always* re-built so the repairs need no longer be special-cased.
467 * filter_popups now gets a csp pointer so it can raise the new
468 * CSP_FLAG_MODIFIED flag.
472 * Added configurable size limit for the IOB. If the IOB grows so
473 * large that the next read would exceed the limit, the header
474 * is generated, and the header & unfiltered buffer are flushed
475 * to the client. Chat then continues in non-buffering,
476 * non-filtering body mode.
478 * Revision 1.44 2001/10/02 18:13:57 oes
481 * Revision 1.43 2001/10/02 15:32:13 oes
482 * Moved generation of hdr
484 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
485 * Cleaning up 2 compiler warnings on OS/2.
487 * Revision 1.41 2001/09/16 17:05:14 jongfoster
488 * Removing unused #include showarg.h
490 * Revision 1.40 2001/09/16 15:41:45 jongfoster
491 * Fixing signed/unsigned comparison warning.
493 * Revision 1.39 2001/09/16 13:21:27 jongfoster
494 * Changes to use new list functions.
496 * Revision 1.38 2001/09/16 13:01:46 jongfoster
497 * Removing redundant function call that zeroed zalloc()'d memory.
499 * Revision 1.37 2001/09/10 11:12:24 oes
500 * Deleted unused variable
502 * Revision 1.36 2001/09/10 10:56:15 oes
503 * Silenced compiler warnings
505 * Revision 1.35 2001/07/31 14:44:22 oes
506 * Deleted unused size parameter from filter_popups()
508 * Revision 1.34 2001/07/30 22:08:36 jongfoster
509 * Tidying up #defines:
510 * - All feature #defines are now of the form FEATURE_xxx
511 * - Permanently turned off WIN_GUI_EDIT
512 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
514 * Revision 1.33 2001/07/29 19:32:00 jongfoster
515 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
517 * Revision 1.32 2001/07/29 18:47:05 jongfoster
518 * Adding missing #include "loadcfg.h"
520 * Revision 1.31 2001/07/29 12:17:48 oes
521 * Applied pthread fix by Paul Lieverse
523 * Revision 1.30 2001/07/25 22:57:13 jongfoster
524 * __BEOS__ no longer overrides FEATURE_PTHREAD.
525 * This is because FEATURE_PTHREAD will soon be widely used, so I
526 * want to keep it simple.
528 * Revision 1.29 2001/07/24 12:47:06 oes
529 * Applied BeOS support update by Eugenia
531 * Revision 1.28 2001/07/23 13:26:12 oes
532 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
534 * Revision 1.27 2001/07/19 19:09:47 haroon
535 * - Added code to take care of the situation where while processing the first
536 * server response (which includes the server header), after finding the end
537 * of the headers we were not looking past the end of the headers for
538 * content modification. I enabled it for filter_popups.
539 * Someone else should look to see if other similar operations should be
540 * done to the discarded portion of the buffer.
542 * Note 2001/07/20: No, the other content modification mechanisms will process
543 * the whole iob later anyway. --oes
545 * Revision 1.26 2001/07/18 12:31:36 oes
548 * Revision 1.25 2001/07/15 19:43:49 jongfoster
549 * Supports POSIX threads.
550 * Also removed some unused #includes.
552 * Revision 1.24 2001/07/13 14:00:40 oes
553 * - Generic content modification scheme:
554 * Each feature has its own applicability flag that is set
555 * from csp->action->flags.
556 * Replaced the "filtering" int flag , by a function pointer
557 * "content_filter" to the function that will do the content
558 * modification. If it is != NULL, the document will be buffered
559 * and processed through *content_filter, which must set
560 * csp->content_length and return a modified copy of the body
561 * or return NULL (on failiure).
562 * - Changed csp->is_text to the more generic bitmap csp->content_type
563 * which can currently take the valued CT_TEXT or CT_GIF
565 * - Removed all #ifdef PCRS
567 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
568 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
569 * the `block_acl' call. This prevents a compilation error when the user
570 * does not wish to use the "ACL" feature.
572 * Revision 1.22 2001/06/29 21:45:41 oes
573 * Indentation, CRLF->LF, Tab-> Space
575 * Revision 1.21 2001/06/29 13:29:36 oes
576 * - Cleaned up, improved comments
577 * - Unified all possible interceptors (CGI,
578 * block, trust, fast_redirect) in one
579 * place, with one (CGI) answer generation
580 * mechansim. Much clearer now.
581 * - Removed the GIF image generation, which
582 * is now done in filters.c:block_url()
583 * - Made error conditions like domain lookup
584 * failiure or (various) problems while talking
585 * to the server use cgi.c:error_response()
586 * instead of generating HTML/HTTP in chat() (yuck!)
587 * - Removed logentry from cancelled commit
589 * Revision 1.20 2001/06/09 10:55:28 jongfoster
590 * Changing BUFSIZ ==> BUFFER_SIZE
592 * Revision 1.19 2001/06/07 23:12:52 jongfoster
593 * Replacing function pointer in struct gateway with a directly
594 * called function forwarded_connect().
595 * Replacing struct gateway with struct forward_spec
597 * Revision 1.18 2001/06/03 19:12:16 oes
598 * introduced new cgi handling
600 * Revision 1.17 2001/06/01 20:07:23 jongfoster
601 * Now uses action +image-blocker{} rather than config->tinygif
603 * Revision 1.16 2001/06/01 18:49:17 jongfoster
604 * Replaced "list_share" with "list" - the tiny memory gain was not
605 * worth the extra complexity.
607 * Revision 1.15 2001/05/31 21:24:47 jongfoster
608 * Changed "permission" to "action" throughout.
609 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
610 * Moved vanilla wafer check into chat(), since we must now
611 * decide whether or not to add it based on the URL.
613 * Revision 1.14 2001/05/29 20:14:01 joergs
614 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
617 * Revision 1.13 2001/05/29 09:50:24 jongfoster
618 * Unified blocklist/imagelist/permissionslist.
619 * File format is still under discussion, but the internal changes
622 * Also modified interceptor behaviour:
623 * - We now intercept all URLs beginning with one of the following
624 * prefixes (and *only* these prefixes):
626 * * http://ijbswa.sf.net/config/
627 * * http://ijbswa.sourceforge.net/config/
628 * - New interceptors "home page" - go to http://i.j.b/ to see it.
629 * - Internal changes so that intercepted and fast redirect pages
630 * are not replaced with an image.
631 * - Interceptors now have the option to send a binary page direct
632 * to the client. (i.e. ijb-send-banner uses this)
633 * - Implemented show-url-info interceptor. (Which is why I needed
634 * the above interceptors changes - a typical URL is
635 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
636 * The previous mechanism would not have intercepted that, and
637 * if it had been intercepted then it then it would have replaced
640 * Revision 1.12 2001/05/27 22:17:04 oes
642 * - re_process_buffer no longer writes the modified buffer
643 * to the client, which was very ugly. It now returns the
644 * buffer, which it is then written by chat.
646 * - content_length now adjusts the Content-Length: header
647 * for modified documents rather than crunch()ing it.
648 * (Length info in csp->content_length, which is 0 for
649 * unmodified documents)
651 * - For this to work, sed() is called twice when filtering.
653 * Revision 1.11 2001/05/26 17:27:53 jongfoster
654 * Added support for CLF and fixed LOG_LEVEL_LOG.
655 * Also did CRLF->LF fix of my previous patch.
657 * Revision 1.10 2001/05/26 15:26:15 jongfoster
658 * ACL feature now provides more security by immediately dropping
659 * connections from untrusted hosts.
661 * Revision 1.9 2001/05/26 00:28:36 jongfoster
662 * Automatic reloading of config file.
663 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
664 * Most of the global variables have been moved to a new
665 * struct configuration_spec, accessed through csp->config->globalname
666 * Most of the globals remaining are used by the Win32 GUI.
668 * Revision 1.8 2001/05/25 22:43:18 jongfoster
669 * Fixing minor memory leak and buffer overflow.
671 * Revision 1.7 2001/05/25 22:34:30 jongfoster
674 * Revision 1.6 2001/05/23 00:13:58 joergs
675 * AmigaOS support fixed.
677 * Revision 1.5 2001/05/22 18:46:04 oes
679 * - Enabled filtering banners by size rather than URL
680 * by adding patterns that replace all standard banner
681 * sizes with the "Junkbuster" gif to the re_filterfile
683 * - Enabled filtering WebBugs by providing a pattern
684 * which kills all 1x1 images
686 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
687 * which is selected by the (nonstandard and therefore
688 * capital) letter 'U' in the option string.
689 * It causes the quantifiers to be ungreedy by default.
690 * Appending a ? turns back to greedy (!).
692 * - Added a new interceptor ijb-send-banner, which
693 * sends back the "Junkbuster" gif. Without imagelist or
694 * MSIE detection support, or if tinygif = 1, or the
695 * URL isn't recognized as an imageurl, a lame HTML
696 * explanation is sent instead.
698 * - Added new feature, which permits blocking remote
699 * script redirects and firing back a local redirect
701 * The feature is conditionally compiled, i.e. it
702 * can be disabled with --disable-fast-redirects,
703 * plus it must be activated by a "fast-redirects"
704 * line in the config file, has its own log level
705 * and of course wants to be displayed by show-proxy-args
706 * Note: Boy, all the #ifdefs in 1001 locations and
707 * all the fumbling with configure.in and acconfig.h
708 * were *way* more work than the feature itself :-(
710 * - Because a generic redirect template was needed for
711 * this, tinygif = 3 now uses the same.
713 * - Moved GIFs, and other static HTTP response templates
718 * - Removed some >400 CRs again (Jon, you really worked
721 * Revision 1.4 2001/05/21 19:34:01 jongfoster
722 * Made failure to bind() a fatal error.
724 * Revision 1.3 2001/05/20 01:21:20 jongfoster
725 * Version 2.9.4 checkin.
726 * - Merged popupfile and cookiefile, and added control over PCRS
727 * filtering, in new "permissionsfile".
728 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
729 * file error you now get a message box (in the Win32 GUI) rather
730 * than the program exiting with no explanation.
731 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
733 * - Removed tabs from "config"
734 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
735 * - Bumped up version number.
737 * Revision 1.2 2001/05/17 22:34:44 oes
738 * - Added hint on GIF char array generation to jcc.c
739 * - Cleaned CRLF's from the sources and related files
740 * - Repaired logging for REF and FRC
742 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
743 * Initial import of version 2.9.3 source tree
746 *********************************************************************/
752 #include <sys/types.h>
760 # ifndef FEATURE_PTHREAD
764 # include <windows.h>
765 # include <process.h>
766 # endif /* ndef FEATURE_PTHREAD */
769 # ifndef _WIN_CONSOLE
771 # endif /* ndef _WIN_CONSOLE */
772 # include "w32svrapi.h"
774 #else /* ifndef _WIN32 */
776 # if !defined (__OS2__)
778 # include <sys/wait.h>
779 # endif /* ndef __OS2__ */
780 # include <sys/time.h>
781 # include <sys/stat.h>
782 # include <sys/ioctl.h>
785 #include <sys/termios.h>
796 # include <socket.h> /* BeOS has select() for sockets only. */
797 # include <OS.h> /* declarations for threads and stuff. */
800 # if defined(__EMX__) || defined(__OS2__)
801 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
806 #define bzero(B,N) memset(B,0x00,n)
821 #include "killpopup.h"
822 #include "miscutil.h"
824 #include "jbsockets.h"
829 #include "urlmatch.h"
831 const char jcc_h_rcs[] = JCC_H_VERSION;
832 const char project_h_rcs[] = PROJECT_H_VERSION;
835 struct client_state clients[1];
836 struct file_list files[1];
838 #ifdef FEATURE_STATISTICS
839 int urls_read = 0; /* total nr of urls read inc rejected */
840 int urls_rejected = 0; /* total nr of urls rejected */
841 #endif /* def FEATURE_STATISTICS */
843 #ifdef FEATURE_GRACEFUL_TERMINATION
847 static void listen_loop(void);
848 static void chat(struct client_state *csp);
850 void serve(struct client_state *csp);
851 #else /* ifndef AMIGA */
852 static void serve(struct client_state *csp);
853 #endif /* def AMIGA */
856 static int32 server_thread(void *data);
857 #endif /* def __BEOS__ */
860 #define sleep(N) Sleep(((N) * 1000))
864 #define sleep(N) DosSleep(((N) * 100))
867 #ifdef FEATURE_PTHREAD
868 pthread_mutex_t log_mutex;
869 pthread_mutex_t log_init_mutex;
871 #ifndef HAVE_GMTIME_R
872 pthread_mutex_t gmtime_mutex;
873 #endif /* ndef HAVE_GMTIME_R */
875 #ifndef HAVE_LOCALTIME_R
876 pthread_mutex_t localtime_mutex;
877 #endif /* ndef HAVE_GMTIME_R */
879 #ifndef HAVE_GETHOSTBYADDR_R
880 pthread_mutex_t gethostbyaddr_mutex;
881 #endif /* ndef HAVE_GETHOSTBYADDR_R */
883 #ifndef HAVE_GETHOSTBYNAME_R
884 pthread_mutex_t gethostbyname_mutex;
885 #endif /* ndef HAVE_GETHOSTBYNAME_R */
888 pthread_mutex_t rand_mutex;
889 #endif /* ndef HAVE_RANDOM */
891 #endif /* FEATURE_PTHREAD */
893 #if defined(unix) || defined(__EMX__)
894 const char *basedir = NULL;
895 const char *pidfile = NULL;
896 int received_hup_signal = 0;
897 #endif /* defined unix */
899 /* The vanilla wafer. */
900 static const char VANILLA_WAFER[] =
901 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
902 "Do_not_send_me_any_copyrighted_information_other_than_the_"
903 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
904 "In_particular_do_not_send_me_any_cookies_that_"
905 "are_subject_to_a_claim_of_copyright_by_anybody._"
906 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
907 "(copyright_or_otherwise)_applying_to_any_cookie._";
909 /* HTTP snipplets. */
910 const char CSUCCEED[] =
911 "HTTP/1.0 200 Connection established\n"
912 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
914 const char CHEADER[] =
915 "HTTP/1.0 400 Invalid header received from browser\r\n"
916 "Connection: close\r\n\r\n"
917 "Invalid header received from browser.\r\n";
919 const char CFORBIDDEN[] =
920 "HTTP/1.0 403 Connection not allowable\r\n"
921 "Proxy-Agent: Privoxy " VERSION "\r\n"
922 "X-Hint: If you read this message interactively, then you know why this happens ,-)\r\n"
923 "Connection: close\r\n\r\n";
925 const char FTP_RESPONSE[] =
926 "HTTP/1.0 400 Invalid request received from browser\r\n"
927 "Connection: close\r\n\r\n"
928 "Invalid request. Privoxy doesn't support FTP.\r\n";
930 const char GOPHER_RESPONSE[] =
931 "HTTP/1.0 400 Invalid request received from browser\r\n"
932 "Connection: close\r\n\r\n"
933 "Invalid request. Privoxy doesn't support gopher.\r\n";
935 /* XXX: should be a template */
936 const char MISSING_DESTINATION_RESPONSE[] =
937 "HTTP/1.0 400 Bad request received from browser\r\n"
938 "Proxy-Agent: Privoxy " VERSION "\r\n"
939 "Connection: close\r\n\r\n"
940 "Bad request. Privoxy was unable to extract the destination.\r\n";
942 /* XXX: should be a template */
943 const char NO_SERVER_DATA_RESPONSE[] =
944 "HTTP/1.0 502 Server or forwarder response empty\r\n"
945 "Proxy-Agent: Privoxy " VERSION "\r\n"
946 "Connection: close\r\n\r\n"
947 "Empty server or forwarder response.\r\n"
948 "The connection was closed without sending any data.\r\n";
950 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
951 /*********************************************************************
953 * Function : sig_handler
955 * Description : Signal handler for different signals.
956 * Exit gracefully on TERM and INT
957 * or set a flag that will cause the errlog
958 * to be reopened by the main thread on HUP.
961 * 1 : the_signal = the signal cause this function to call
965 *********************************************************************/
966 static void sig_handler(int the_signal)
972 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
983 received_hup_signal = 1;
988 * We shouldn't be here, unless we catch signals
989 * in main() that we can't handle here!
991 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
999 /*********************************************************************
1001 * Function : client_protocol_is_unsupported
1003 * Description : Checks if the client used a known unsupported
1004 * protocol and deals with it by sending an error
1008 * 1 : csp = Current client state (buffers, headers, etc...)
1009 * 2 : req = the first request line send by the client
1011 * Returns : TRUE if an error response has been generated, or
1012 * FALSE if the request doesn't look invalid.
1014 *********************************************************************/
1015 int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1017 char buf[BUFFER_SIZE];
1020 * If it's a FTP or gopher request, we don't support it.
1022 * These checks are better than nothing, but they might
1023 * not work in all configurations and some clients might
1024 * have problems digesting the answer.
1026 * They should, however, never cause more problems than
1027 * Privoxy's old behaviour (returning the misleading HTML
1030 * "Could not resolve http://(ftp|gopher)://example.org").
1032 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1034 if (!strncmpic(req, "GET ftp://", 10))
1036 strcpy(buf, FTP_RESPONSE);
1037 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as FTP proxy: %s",
1038 csp->ip_addr_str, req);
1042 strcpy(buf, GOPHER_RESPONSE);
1043 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as gopher proxy: %s",
1044 csp->ip_addr_str, req);
1046 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1048 write_socket(csp->cfd, buf, strlen(buf));
1057 /*********************************************************************
1059 * Function : get_request_destination_elsewhere
1061 * Description : If the client's request was redirected into
1062 * Privoxy without the client's knowledge,
1063 * the request line lacks the destination host.
1065 * This function tries to get it elsewhere,
1066 * provided accept-intercepted-requests is enabled.
1068 * "Elsewhere" currently only means "Host: header",
1069 * but in the future we may ask the redirecting
1070 * packet filter to look the destination up.
1072 * If the destination stays unknown, an error
1073 * response is send to the client and headers
1074 * are freed so that chat() can return directly.
1077 * 1 : csp = Current client state (buffers, headers, etc...)
1078 * 2 : headers = a header list
1080 * Returns : JB_ERR_OK if the destination is now known, or
1081 * JB_ERR_PARSE if it isn't.
1083 *********************************************************************/
1084 jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1086 char buf[BUFFER_SIZE];
1089 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1091 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1092 " Privoxy isn't configured to accept intercepted requests.",
1093 csp->ip_addr_str, csp->http->cmd);
1094 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1095 csp->ip_addr_str, csp->http->cmd);
1097 strcpy(buf, CHEADER);
1098 write_socket(csp->cfd, buf, strlen(buf));
1099 destroy_list(headers);
1101 return JB_ERR_PARSE;
1103 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1105 /* Split the domain we just got for pattern matching */
1106 init_domain_components(csp->http);
1112 /* We can't work without destination. Go spread the news.*/
1114 req = list_to_text(headers);
1116 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1117 csp->ip_addr_str, csp->http->cmd);
1118 log_error(LOG_LEVEL_ERROR,
1119 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1120 csp->ip_addr_str, csp->http->cmd, req);
1123 strcpy(buf, MISSING_DESTINATION_RESPONSE);
1124 write_socket(csp->cfd, buf, strlen(buf));
1125 destroy_list(headers);
1127 return JB_ERR_PARSE;
1130 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1131 * to get the destination IP address, use it as host directly
1132 * or do a reverse DNS lookup first.
1137 /*********************************************************************
1139 * Function : get_server_headers
1141 * Description : Parses server headers in iob and fills them
1142 * into csp->headers so that they can later be
1146 * 1 : csp = Current client state (buffers, headers, etc...)
1148 * Returns : JB_ERR_OK if everything went fine, or
1149 * JB_ERR_PARSE if the headers were incomplete.
1151 *********************************************************************/
1152 jb_err get_server_headers(struct client_state *csp)
1154 int continue_hack_in_da_house = 0;
1157 while (((header = get_header(csp)) != NULL) || continue_hack_in_da_house)
1162 * continue hack in da house. Ignore the ending of
1163 * this head and continue enlisting header lines.
1164 * The reason is described below.
1166 enlist(csp->headers, "");
1167 continue_hack_in_da_house = 0;
1170 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1173 * It's a bodyless continue response, don't
1174 * stop header parsing after reaching it's end.
1176 * As a result Privoxy will concatenate the
1177 * next response's head and parse and deliver
1178 * the headers as if they belonged to one request.
1180 * The client will separate them because of the
1181 * empty line between them.
1183 * XXX: What we're doing here is clearly against
1184 * the intended purpose of the continue header,
1185 * and under some conditions (HTTP/1.0 client request)
1186 * it's a standard violation.
1188 * Anyway, "sort of against the spec" is preferable
1189 * to "always getting confused by Continue responses"
1190 * (Privoxy's behaviour before this hack was added)
1192 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1193 continue_hack_in_da_house = 1;
1195 else if (*header == '\0')
1198 * If the header is empty, but the Continue hack
1199 * isn't active, we can assume that we reached the
1200 * end of the buffer before we hit the end of the
1203 * Inform the caller an let it decide how to handle it.
1205 return JB_ERR_PARSE;
1209 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1212 * XXX: Should we quit the request and return a
1213 * out of memory error page instead?
1215 log_error(LOG_LEVEL_ERROR,
1216 "Out of memory while enlisting server headers. %s lost.",
1226 /*********************************************************************
1230 * Description : Once a connection to the client has been accepted,
1231 * this function is called (via serve()) to handle the
1232 * main business of the communication. When this
1233 * function returns, the caller must close the client
1236 * FIXME: chat is nearly thousand lines long.
1240 * 1 : csp = Current client state (buffers, headers, etc...)
1242 * Returns : On success, the number of bytes written are returned (zero
1243 * indicates nothing was written). On error, -1 is returned,
1244 * and errno is set appropriately. If count is zero and the
1245 * file descriptor refers to a regular file, 0 will be
1246 * returned without causing any other effect. For a special
1247 * file, the results are not portable.
1249 *********************************************************************/
1250 static void chat(struct client_state *csp)
1253 * This next lines are a little ugly, but they simplifies the if statements
1254 * below. Basically if TOGGLE, then we want the if to test if the
1255 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
1256 * then we want the if to test for CSP_FLAG_FORCED , else we don't
1258 #ifdef FEATURE_TOGGLE
1259 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
1260 #else /* ifndef FEATURE_TOGGLE */
1261 # define IS_TOGGLED_ON_AND
1262 #endif /* ndef FEATURE_TOGGLE */
1263 #ifdef FEATURE_FORCE_LOAD
1264 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
1265 #else /* ifndef FEATURE_FORCE_LOAD */
1266 # define IS_NOT_FORCED_AND
1267 #endif /* def FEATURE_FORCE_LOAD */
1269 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
1271 char buf[BUFFER_SIZE];
1279 int ms_iis5_hack = 0;
1280 size_t byte_count = 0;
1281 int forwarded_connect_retries = 0;
1282 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
1283 const struct forward_spec * fwd;
1284 struct http_request *http;
1285 int len; /* for buffer sizes (and negative error codes) */
1286 #ifdef FEATURE_KILL_POPUPS
1287 int block_popups; /* bool, 1==will block popups */
1288 int block_popups_now = 0; /* bool, 1==currently blocking popups */
1289 #endif /* def FEATURE_KILL_POPUPS */
1291 int pcrs_filter; /* bool, 1==will filter through pcrs */
1292 int gif_deanimate; /* bool, 1==will deanimate gifs */
1293 int jpeg_inspect; /* bool, 1==will inspect jpegs */
1295 /* Function that does the content filtering for the current request */
1296 char *(*content_filter)() = NULL;
1298 /* Skeleton for HTTP response, if we should intercept the request */
1299 struct http_response *rsp;
1301 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1302 struct list header_list;
1303 struct list *headers = &header_list;
1308 * Read the client's request. Note that since we're not using select() we
1309 * could get blocked here if a client connected, then didn't say anything!
1314 len = read_socket(csp->cfd, buf, sizeof(buf));
1316 if (len <= 0) break; /* error! */
1319 * If there is no memory left for buffering the
1320 * request, there is nothing we can do but hang up
1322 if (add_to_iob(csp, buf, len))
1327 req = get_header(csp);
1331 break; /* no HTTP request! */
1336 continue; /* more to come! */
1339 /* Does the request line look invalid? */
1340 if (client_protocol_is_unsupported(csp, req))
1343 * Yes. The request has already been
1344 * answered with a error response, the buffers
1345 * were freed and we're done with chatting.
1350 #ifdef FEATURE_FORCE_LOAD
1351 /* If this request contains the FORCE_PREFIX,
1352 * better get rid of it now and set the force flag --oes
1355 if (strstr(req, FORCE_PREFIX))
1357 strclean(req, FORCE_PREFIX);
1358 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
1359 csp->flags |= CSP_FLAG_FORCED;
1362 #endif /* def FEATURE_FORCE_LOAD */
1364 switch( parse_http_request(req, http, csp) )
1367 log_error(LOG_LEVEL_ERROR, "Out of memory while parsing request.");
1370 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", req);
1378 if (http->cmd == NULL)
1380 strcpy(buf, CHEADER);
1381 write_socket(csp->cfd, buf, strlen(buf));
1383 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
1385 free_http_request(http);
1389 /* grab the rest of the client's headers */
1393 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1395 len = read_socket(csp->cfd, buf, sizeof(buf));
1398 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1403 * If there is no memory left for buffering the
1404 * request, there is nothing we can do but hang up
1406 if (add_to_iob(csp, buf, len))
1413 if (p == NULL) break;
1420 if (http->host == NULL)
1423 * If we still don't know the request destination,
1424 * the request is invalid or the client uses
1425 * Privoxy without it's knowledge.
1427 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
1430 * Our attempts to get the request destination
1431 * elsewhere failed or Privoxy is configured
1432 * to only accept proxy requests.
1434 * An error response has already been send
1435 * and we're done here.
1441 /* decide how to route the HTTP request */
1443 if ((fwd = forward_url(http, csp)) == NULL)
1445 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1446 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1449 /* build the http request to send to the server
1450 * we have to do one of the following:
1452 * create = use the original HTTP request to create a new
1453 * HTTP request that has either the path component
1454 * without the http://domainspec (w/path) or the
1455 * full orininal URL (w/url)
1456 * Note that the path and/or the HTTP version may
1457 * have been altered by now.
1459 * connect = Open a socket to the host:port of the server
1460 * and short-circuit server and client socket.
1462 * pass = Pass the request unchanged if forwarding a CONNECT
1463 * request to a parent proxy. Note that we'll be sending
1464 * the CFAIL message ourselves if connecting to the parent
1465 * fails, but we won't send a CSUCCEED message if it works,
1466 * since that would result in a double message (ours and the
1467 * parent's). After sending the request to the parent, we simply
1470 * here's the matrix:
1473 * +--------+--------+
1475 * 0 | create | connect|
1477 * Forwarding +--------+--------+
1479 * 1 | create | pass |
1481 * +--------+--------+
1486 * Determine the actions for this URL
1488 #ifdef FEATURE_TOGGLE
1489 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1491 /* Most compatible set of actions (i.e. none) */
1492 init_current_action(csp->action);
1495 #endif /* ndef FEATURE_TOGGLE */
1497 url_actions(http, csp);
1502 * Check if a CONNECT request is allowable:
1503 * In the absence of a +limit-connect action, allow only port 443.
1504 * If there is an action, allow whatever matches the specificaton.
1508 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
1509 || (csp->action->flags & ACTION_LIMIT_CONNECT
1510 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
1512 if (csp->action->flags & ACTION_TREAT_FORBIDDEN_CONNECTS_LIKE_BLOCKS)
1514 /* The response will violate the specs, but makes unblocking easier. */
1515 log_error(LOG_LEVEL_ERROR, "Marking suspicious CONNECT request from %s for blocking.",
1517 csp->action->flags |= ACTION_BLOCK;
1522 strcpy(buf, CFORBIDDEN);
1523 write_socket(csp->cfd, buf, strlen(buf));
1524 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
1525 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
1533 * Downgrade http version from 1.1 to 1.0 if +downgrade
1536 if ( (http->ssl == 0)
1537 && (!strcmpic(http->ver, "HTTP/1.1"))
1538 && (csp->action->flags & ACTION_DOWNGRADE))
1541 http->ver = strdup("HTTP/1.0");
1543 if (http->ver == NULL)
1545 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1550 * Save a copy of the original request for logging
1552 http->ocmd = strdup(http->cmd);
1554 if (http->ocmd == NULL)
1556 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
1560 * (Re)build the HTTP request for non-SSL requests.
1561 * If forwarding, use the whole URL, else, use only the path.
1567 http->cmd = strdup(http->gpc);
1568 string_append(&http->cmd, " ");
1570 if (fwd->forward_host)
1572 string_append(&http->cmd, http->url);
1576 string_append(&http->cmd, http->path);
1578 string_append(&http->cmd, " ");
1579 string_append(&http->cmd, http->ver);
1581 if (http->cmd == NULL)
1583 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1585 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", http->cmd);
1587 enlist(csp->headers, http->cmd);
1589 /* Append the previously read headers */
1590 list_append_list_unique(csp->headers, headers);
1591 destroy_list(headers);
1594 * If the user has not supplied any wafers, and the user has not
1595 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1597 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1598 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1600 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1604 #ifdef FEATURE_KILL_POPUPS
1605 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
1606 #endif /* def FEATURE_KILL_POPUPS */
1608 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
1609 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
1611 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
1613 jpeg_inspect = ((csp->action->flags & ACTION_JPEG_INSPECT) != 0);
1616 * We have a request. Now, check to see if we need to
1617 * intercept it, i.e. If ..
1621 /* We may not forward the request by rfc2616 sect 14.31 */
1622 (NULL != (rsp = direct_response(csp)))
1624 /* or we are enabled and... */
1625 || (IS_ENABLED_AND (
1627 /* ..the request was blocked */
1628 ( NULL != (rsp = block_url(csp)))
1630 /* ..or untrusted */
1631 #ifdef FEATURE_TRUST
1632 || ( NULL != (rsp = trust_url(csp)))
1633 #endif /* def FEATURE_TRUST */
1635 /* ..or a redirect kicked in */
1636 || ( NULL != (rsp = redirect_url(csp)))
1640 * .. or a CGI call was detected and answered.
1642 * This check comes last to give the user the power
1643 * to deny acces to some (or all) of the cgi pages.
1645 || (NULL != (rsp = dispatch_cgi(csp)))
1649 /* Write the answer to the client */
1650 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1651 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1653 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1656 #ifdef FEATURE_STATISTICS
1657 /* Count as a rejected request */
1658 csp->flags |= CSP_FLAG_REJECTED;
1659 #endif /* def FEATURE_STATISTICS */
1661 /* Log (FIXME: All intercept reasons appear as "crunch" with Status 200) */
1662 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
1663 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
1665 /* Clean up and return */
1666 free_http_response(rsp);
1670 hdr = sed(client_patterns, add_client_headers, csp);
1673 /* FIXME Should handle error properly */
1674 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1677 list_remove_all(csp->headers);
1679 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1681 if (fwd->forward_host)
1683 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1684 fwd->forward_host, fwd->forward_port, http->hostport);
1688 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1691 /* here we connect to the server, gateway, or the forwarder */
1693 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
1694 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
1696 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
1697 forwarded_connect_retries, http->hostport);
1700 if (csp->sfd == JB_INVALID_SOCKET)
1702 if (fwd->type != SOCKS_NONE)
1705 rsp = error_response(csp, "forwarding-failed", errno);
1707 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1708 csp->ip_addr_str, http->ocmd);
1710 else if (errno == EINVAL)
1712 rsp = error_response(csp, "no-such-domain", errno);
1714 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
1715 csp->ip_addr_str, http->ocmd);
1719 rsp = error_response(csp, "connect-failed", errno);
1721 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1724 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1725 csp->ip_addr_str, http->ocmd);
1729 /* Write the answer to the client */
1732 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1733 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1735 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1739 free_http_response(rsp);
1744 if (fwd->forward_host || (http->ssl == 0))
1746 /* write the client's (modified) header to the server
1747 * (along with anything else that may be in the buffer)
1750 if (write_socket(csp->sfd, hdr, strlen(hdr))
1751 || (flush_socket(csp->sfd, csp) < 0))
1753 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1756 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1757 csp->ip_addr_str, http->ocmd);
1759 rsp = error_response(csp, "connect-failed", errno);
1763 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1764 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1766 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1770 free_http_response(rsp);
1778 * We're running an SSL tunnel and we're not forwarding,
1779 * so just send the "connect succeeded" message to the
1780 * client, flush the rest, and get out of the way.
1782 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1783 csp->ip_addr_str, http->ocmd);
1785 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
1793 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
1795 /* we're finished with the client's header */
1798 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1800 /* pass data between the client and server
1801 * until one or the other shuts down the connection.
1810 * FD_ZERO here seems to point to an errant macro which crashes.
1811 * So do this by hand for now...
1813 memset(&rfds,0x00,sizeof(fd_set));
1817 FD_SET(csp->cfd, &rfds);
1818 FD_SET(csp->sfd, &rfds);
1820 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
1824 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1828 /* this is the body of the browser's request
1829 * just read it and write it.
1832 if (FD_ISSET(csp->cfd, &rfds))
1834 len = read_socket(csp->cfd, buf, sizeof(buf));
1838 break; /* "game over, man" */
1841 if (write_socket(csp->sfd, buf, (size_t)len))
1843 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1850 * The server wants to talk. It could be the header or the body.
1851 * If `hdr' is null, then it's the header otherwise it's the body.
1852 * FIXME: Does `hdr' really mean `host'? No.
1856 if (FD_ISSET(csp->sfd, &rfds))
1859 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1863 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1865 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1866 csp->ip_addr_str, http->ocmd);
1868 rsp = error_response(csp, "connect-failed", errno);
1872 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1873 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1875 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1879 free_http_response(rsp);
1883 /* Add a trailing zero. This lets filter_popups
1884 * use string operations.
1888 #ifdef FEATURE_KILL_POPUPS
1889 /* Filter the popups on this read. */
1890 if (block_popups_now)
1892 filter_popups(buf, csp);
1894 #endif /* def FEATURE_KILL_POPUPS */
1896 /* Normally, this would indicate that we've read
1897 * as much as the server has sent us and we can
1898 * close the client connection. However, Microsoft
1899 * in its wisdom has released IIS/5 with a bug that
1900 * prevents it from sending the trailing \r\n in
1901 * a 302 redirect header (and possibly other headers).
1902 * To work around this if we've haven't parsed
1903 * a full header we'll append a trailing \r\n
1904 * and see if this now generates a valid one.
1906 * This hack shouldn't have any impacts. If we've
1907 * already transmitted the header or if this is a
1908 * SSL connection, then we won't bother with this
1909 * hack. So we only work on partially received
1910 * headers. If we append a \r\n and this still
1911 * doesn't generate a valid header, then we won't
1912 * transmit anything to the client.
1917 if (server_body || http->ssl)
1920 * If we have been buffering up the document,
1921 * now is the time to apply content modification
1922 * and send the result to the client.
1927 * If the content filter fails, use the original
1928 * buffer and length.
1929 * (see p != NULL ? p : csp->iob->cur below)
1931 if (NULL == (p = (*content_filter)(csp)))
1933 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
1936 hdr = sed(server_patterns_light, NULL, csp);
1940 /* FIXME Should handle error properly */
1941 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1944 if (write_socket(csp->cfd, hdr, strlen(hdr))
1945 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
1947 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1957 break; /* "game over, man" */
1961 * This is NOT the body, so
1962 * Let's pretend the server just sent us a blank line.
1964 snprintf(buf, sizeof(buf), "\r\n");
1965 len = (int)strlen(buf);
1968 * Now, let the normal header parsing algorithm below do its
1969 * job. If it fails, we'll exit instead of continuing.
1976 * If this is an SSL connection or we're in the body
1977 * of the server document, just write it to the client,
1978 * unless we need to buffer the body for later content-filtering
1981 if (server_body || http->ssl)
1986 * If there is no memory left for buffering the content, or the buffer limit
1987 * has been reached, switch to non-filtering mode, i.e. make & write the
1988 * header, flush the iob and buf, and get out of the way.
1990 if (add_to_iob(csp, buf, len))
1995 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
1997 hdr = sed(server_patterns, add_server_headers, csp);
2001 * Memory is too tight to even generate the header.
2002 * Send our static "Out-of-memory" page.
2004 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2005 rsp = cgi_error_memory();
2007 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
2008 || write_socket(csp->cfd, rsp->body, rsp->content_length))
2010 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2015 hdrlen = strlen(hdr);
2017 if (write_socket(csp->cfd, hdr, hdrlen)
2018 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
2019 || (write_socket(csp->cfd, buf, (size_t)len)))
2021 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
2027 byte_count += hdrlen + (size_t)(flushed + len);
2029 content_filter = NULL;
2036 if (write_socket(csp->cfd, buf, (size_t)len))
2038 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2042 byte_count += (size_t)len;
2047 /* we're still looking for the end of the
2048 * server's header ... (does that make header
2049 * parsing an "out of body experience" ?
2053 * buffer up the data we just read. If that fails,
2054 * there's little we can do but send our static
2055 * out-of-memory page.
2057 if (add_to_iob(csp, buf, len))
2059 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2060 rsp = cgi_error_memory();
2062 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
2063 || write_socket(csp->cfd, rsp->body, rsp->content_length))
2065 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2070 /* Convert iob into something sed() can digest */
2071 if (JB_ERR_PARSE == get_server_headers(csp))
2075 /* Well, we tried our MS IIS/5
2076 * hack and it didn't work.
2077 * The header is incomplete
2078 * and there isn't anything
2079 * we can do about it.
2085 /* Since we have to wait for
2086 * more from the server before
2087 * we can parse the headers
2088 * we just continue here.
2094 /* Did we actually get anything? */
2095 if (NULL == csp->headers->first)
2097 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
2098 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2099 strcpy(buf, NO_SERVER_DATA_RESPONSE);
2100 write_socket(csp->cfd, buf, strlen(buf));
2101 free_http_request(http);
2105 /* we have now received the entire header.
2106 * filter it and send the result to the client
2109 hdr = sed(server_patterns, add_server_headers, csp);
2112 /* FIXME Should handle error properly */
2113 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2116 #ifdef FEATURE_KILL_POPUPS
2117 /* Start blocking popups if appropriate. */
2119 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
2120 !http->ssl && /* We talk plaintext */
2121 block_popups) /* Policy allows */
2123 block_popups_now = 1;
2125 * Filter the part of the body that came in the same read
2126 * as the last headers:
2128 filter_popups(csp->iob->cur, csp);
2131 #endif /* def FEATURE_KILL_POPUPS */
2133 /* Buffer and pcrs filter this if appropriate. */
2135 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
2136 !http->ssl && /* We talk plaintext */
2137 pcrs_filter) /* Policy allows */
2139 content_filter = pcrs_filter_response;
2142 /* Buffer and gif_deanimate this if appropriate. */
2144 if ((csp->content_type & CT_GIF) && /* It's an image/gif MIME-Type */
2145 !http->ssl && /* We talk plaintext */
2146 gif_deanimate) /* Policy allows */
2148 content_filter = gif_deanimate_response;
2151 /* Buffer and jpg_inspect this if appropriate. */
2153 if ((csp->content_type & CT_JPEG) && /* It's an image/jpeg MIME-Type */
2154 !http->ssl && /* We talk plaintext */
2155 jpeg_inspect) /* Policy allows */
2157 content_filter = jpeg_inspect_response;
2161 * Only write if we're not buffering for content modification
2163 if (!content_filter)
2165 /* write the server's (modified) header to
2166 * the client (along with anything else that
2167 * may be in the buffer)
2170 if (write_socket(csp->cfd, hdr, strlen(hdr))
2171 || ((len = flush_socket(csp->cfd, csp)) < 0))
2173 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
2175 /* the write failed, so don't bother
2176 * mentioning it to the client...
2177 * it probably can't hear us anyway.
2183 byte_count += (size_t)len;
2186 /* we're finished with the server's header */
2191 /* If this was a MS IIS/5 hack then it means
2192 * the server has already closed the
2193 * connection. Nothing more to read. Time
2204 return; /* huh? we should never get here */
2207 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
2208 csp->ip_addr_str, http->ocmd, byte_count);
2212 /*********************************************************************
2216 * Description : This is little more than chat. We only "serve" to
2217 * to close any socket that chat may have opened.
2220 * 1 : csp = Current client state (buffers, headers, etc...)
2224 *********************************************************************/
2226 void serve(struct client_state *csp)
2227 #else /* ifndef AMIGA */
2228 static void serve(struct client_state *csp)
2229 #endif /* def AMIGA */
2232 close_socket(csp->cfd);
2234 if (csp->sfd != JB_INVALID_SOCKET)
2236 close_socket(csp->sfd);
2239 csp->flags &= ~CSP_FLAG_ACTIVE;
2245 /*********************************************************************
2247 * Function : server_thread
2249 * Description : We only exist to call `serve' in a threaded environment.
2252 * 1 : data = Current client state (buffers, headers, etc...)
2254 * Returns : Always 0.
2256 *********************************************************************/
2257 static int32 server_thread(void *data)
2259 serve((struct client_state *) data);
2266 /*********************************************************************
2270 * Description : Print usage info & exit.
2272 * Parameters : Pointer to argv[0] for identifying ourselves
2276 *********************************************************************/
2277 void usage(const char *myname)
2279 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
2281 "Usage: %s [--help] [--version] [configfile]\n"
2283 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
2285 "Aborting.\n", myname);
2292 /*********************************************************************
2296 * Description : Load the config file and start the listen loop.
2297 * This function is a lot more *sane* with the `load_config'
2298 * and `listen_loop' functions; although it stills does
2299 * a *little* too much for my taste.
2302 * 1 : argc = Number of parameters (including $0).
2303 * 2 : argv = Array of (char *)'s to the parameters.
2305 * Returns : 1 if : can't open config file, unrecognized directive,
2306 * stats requested in multi-thread mode, can't open the
2307 * log file, can't open the jar file, listen port is invalid,
2308 * any load fails, and can't bind port.
2310 * Else main never returns, the process must be signaled
2311 * to terminate execution. Or, on Windows, use the
2312 * "File", "Exit" menu option.
2314 *********************************************************************/
2316 int real_main(int argc, const char *argv[])
2318 int main(int argc, const char *argv[])
2322 unsigned int random_seed;
2324 struct passwd *pw = NULL;
2325 struct group *grp = NULL;
2334 #if !defined(_WIN32)
2342 * Parse the command line arguments
2344 while (++argc_pos < argc)
2347 /* Check to see if the service must be installed or uninstalled */
2348 if (strncmp(argv[argc_pos], "--install", 9) == 0)
2350 const char *pName = argv[argc_pos] + 9;
2353 exit( (install_service(pName)) ? 0 : 1 );
2355 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
2357 const char *pName = argv[argc_pos] + 11;
2360 exit((uninstall_service(pName)) ? 0 : 1);
2362 else if (strcmp(argv[argc_pos], "--service" ) == 0)
2364 bRunAsService = TRUE;
2365 w32_set_service_cwd();
2366 atexit(w32_service_exit_notify);
2369 #endif /* defined(_WIN32) */
2372 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2374 if (strcmp(argv[argc_pos], "--help") == 0)
2379 else if(strcmp(argv[argc_pos], "--version") == 0)
2381 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
2387 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
2392 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
2394 if (++argc_pos == argc) usage(argv[0]);
2395 pidfile = strdup(argv[argc_pos]);
2398 else if (strcmp(argv[argc_pos], "--user" ) == 0)
2400 if (++argc_pos == argc) usage(argv[argc_pos]);
2402 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
2405 if (NULL == (grp = getgrnam(p)))
2407 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
2411 if (NULL == (pw = getpwnam(argv[argc_pos])))
2413 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
2416 if (p != NULL) *--p = '\0';
2419 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
2424 #endif /* defined(unix) */
2425 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
2427 configfile = argv[argc_pos];
2430 } /* -END- while (more arguments) */
2433 if ( *configfile != '/' )
2435 char *abs_file, cwd[1024];
2437 /* make config-filename absolute here */
2438 if ( !(getcwd(cwd, sizeof(cwd))))
2440 perror("get working dir failed");
2444 if (!(basedir = strdup(cwd))
2445 || (!(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))))
2447 perror("malloc failed");
2450 strcpy( abs_file, basedir );
2451 strcat( abs_file, "/" );
2452 strcat( abs_file, configfile );
2453 configfile = abs_file;
2455 #endif /* defined unix */
2459 clients->next = NULL;
2463 #elif defined(_WIN32)
2467 #ifdef FEATURE_PTHREAD
2469 * Prepare global mutex semaphores
2471 pthread_mutex_init(&log_mutex,0);
2472 pthread_mutex_init(&log_init_mutex,0);
2474 #ifndef HAVE_GMTIME_R
2475 pthread_mutex_init(&gmtime_mutex,0);
2476 #endif /* ndef HAVE_GMTIME_R */
2478 #ifndef HAVE_LOCALTIME_R
2479 pthread_mutex_init(&localtime_mutex,0);
2480 #endif /* ndef HAVE_GMTIME_R */
2482 #ifndef HAVE_GETHOSTBYADDR_R
2483 pthread_mutex_init(&gethostbyaddr_mutex,0);
2484 #endif /* ndef HAVE_GETHOSTBYADDR_R */
2486 #ifndef HAVE_GETHOSTBYNAME_R
2487 pthread_mutex_init(&gethostbyname_mutex,0);
2488 #endif /* ndef HAVE_GETHOSTBYNAME_R */
2491 pthread_mutex_init(&rand_mutex,0);
2492 #endif /* ndef HAVE_RANDOM */
2494 #endif /* FEATURE_PTHREAD */
2496 random_seed = (unsigned int)time(NULL);
2498 srandom(random_seed);
2501 #endif /* ifdef HAVE_RANDOM */
2504 * Unix signal handling
2506 * Catch the abort, interrupt and terminate signals for a graceful exit
2507 * Catch the hangup signal so the errlog can be reopened.
2508 * Ignore the broken pipe signals (FIXME: Why?)
2510 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
2513 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
2514 const int ignored_signals[] = { SIGPIPE, 0 };
2516 for (idx = 0; catched_signals[idx] != 0; idx++)
2518 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
2519 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
2521 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
2522 #endif /* ifdef sun */
2524 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
2528 for (idx = 0; ignored_signals[idx] != 0; idx++)
2530 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
2532 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
2537 #else /* ifdef _WIN32 */
2538 # ifdef _WIN_CONSOLE
2540 * We *are* in a windows console app.
2541 * Print a verbose messages about FAQ's and such
2543 printf("%s", win32_blurb);
2544 # endif /* def _WIN_CONSOLE */
2545 #endif /* def _WIN32 */
2548 /* Initialize the CGI subsystem */
2549 cgi_init_error_messages();
2552 * If runnig on unix and without the --nodaemon
2553 * option, become a daemon. I.e. fork, detach
2554 * from tty and get process group leadership
2567 if ( pid < 0 ) /* error */
2572 else if ( pid != 0 ) /* parent */
2577 * must check for errors
2578 * child died due to missing files aso
2581 wpid = waitpid( pid, &status, WNOHANG );
2590 /* Should be more portable, but not as well tested */
2595 #else /* ndef __FreeBSD__ */
2597 #endif /* ndef __FreeBSD__ */
2598 fd = open("/dev/tty", O_RDONLY);
2601 /* no error check here */
2602 ioctl( fd, TIOCNOTTY,0 );
2606 /* FIXME: should close stderr (fd 2) here too, but the test
2608 * and load config file is done in listen_loop() and puts
2609 * some messages on stderr there.
2616 } /* -END- if (!no_daemon) */
2619 * As soon as we have written the PID file, we can switch
2620 * to the user and group ID indicated by the --user option
2626 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
2628 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
2634 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
2636 if (chroot(pw->pw_dir) < 0)
2638 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
2642 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
2645 if (setuid(pw->pw_uid))
2647 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
2651 char putenv_dummy[64];
2653 strcpy(putenv_dummy, "HOME=/");
2654 if (putenv(putenv_dummy) != 0)
2656 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
2659 snprintf(putenv_dummy, 64, "USER=%s", pw->pw_name);
2660 if (putenv(putenv_dummy) != 0)
2662 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
2668 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
2671 #endif /* defined unix */
2674 /* This will be FALSE unless the command line specified --service
2678 /* Yup, so now we must attempt to establish a connection
2679 * with the service dispatcher. This will only work if this
2680 * process was launched by the service control manager to
2681 * actually run as a service. If this isn't the case, i've
2682 * known it take around 30 seconds or so for the call to return.
2685 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
2686 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
2688 /* Service has run, and at this point is now being stopped, so just return */
2693 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
2695 /* An error occurred. Usually it's because --service was wrongly specified
2696 * and we were unable to connect to the Service Control Dispatcher because
2697 * it wasn't expecting us and is therefore not listening.
2699 * For now, just continue below to call the listen_loop function.
2702 #endif /* def _WIN32 */
2712 /*********************************************************************
2714 * Function : bind_port_helper
2716 * Description : Bind the listen port. Handles logging, and aborts
2720 * 1 : config = Privoxy configuration. Specifies port
2723 * Returns : Port that was opened.
2725 *********************************************************************/
2726 static jb_socket bind_port_helper(struct configuration_spec * config)
2731 if ( (config->haddr != NULL)
2732 && (config->haddr[0] == '1')
2733 && (config->haddr[1] == '2')
2734 && (config->haddr[2] == '7')
2735 && (config->haddr[3] == '.') )
2737 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
2740 else if (config->haddr == NULL)
2742 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
2747 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
2748 config->hport, config->haddr);
2751 result = bind_port(config->haddr, config->hport, &bfd);
2758 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2759 "There may be another Privoxy or some other "
2760 "proxy running on port %d",
2761 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
2762 config->hport, config->hport);
2765 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2766 "The hostname is not resolvable",
2767 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2770 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
2771 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2774 /* shouldn't get here */
2775 return JB_INVALID_SOCKET;
2778 config->need_bind = 0;
2785 /* Without this simple workaround we get this compiler warning from _beginthread
2786 * warning C4028: formal parameter 1 different from declaration
2788 void w32_service_listen_loop(void *p)
2792 #endif /* def _WIN32 */
2795 /*********************************************************************
2797 * Function : listen_loop
2799 * Description : bind the listen port and enter a "FOREVER" listening loop.
2805 *********************************************************************/
2806 static void listen_loop(void)
2808 struct client_state *csp = NULL;
2810 struct configuration_spec * config;
2812 config = load_config();
2814 bfd = bind_port_helper(config);
2816 #ifdef FEATURE_GRACEFUL_TERMINATION
2817 while (!g_terminate)
2822 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
2823 while (waitpid(-1, NULL, WNOHANG) > 0)
2825 /* zombie children */
2827 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
2830 * Free data that was used by died threads
2836 * Re-open the errlog after HUP signal
2838 if (received_hup_signal)
2840 init_error_log(Argv[0], config->logfile, config->debug);
2841 received_hup_signal = 0;
2846 #ifdef FEATURE_COOKIE_JAR
2848 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
2849 * already open. I think unload_configfile() is not being run, which should do
2850 * this work. Until that can get resolved, we'll use this workaround.
2854 if (csp->config->jar)
2856 fclose(csp->config->jar);
2857 csp->config->jar = NULL;
2859 #endif /* FEATURE_COOKIE_JAR */
2860 #endif /* __OS2__ */
2862 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
2864 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
2868 csp->flags |= CSP_FLAG_ACTIVE;
2869 csp->sfd = JB_INVALID_SOCKET;
2871 csp->config = config = load_config();
2873 if ( config->need_bind )
2876 * Since we were listening to the "old port", we will not see
2877 * a "listen" param change until the next IJB request. So, at
2878 * least 1 more request must be made for us to find the new
2879 * setting. I am simply closing the old socket and binding the
2882 * Which-ever is correct, we will serve 1 more page via the
2883 * old settings. This should probably be a "show-proxy-args"
2884 * request. This should not be a so common of an operation
2885 * that this will hurt people's feelings.
2890 bfd = bind_port_helper(config);
2893 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
2895 if (!accept_connection(csp, bfd))
2897 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
2910 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
2913 #ifdef FEATURE_TOGGLE
2914 if (global_toggle_state)
2916 csp->flags |= CSP_FLAG_TOGGLED_ON;
2918 #endif /* def FEATURE_TOGGLE */
2920 if (run_loader(csp))
2922 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
2923 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2927 if (block_acl(NULL,csp))
2929 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
2930 close_socket(csp->cfd);
2934 #endif /* def FEATURE_ACL */
2936 /* add it to the list of clients */
2937 csp->next = clients->next;
2938 clients->next = csp;
2940 if (config->multi_threaded)
2944 /* this is a switch () statment in the C preprocessor - ugh */
2945 #undef SELECTED_ONE_OPTION
2947 /* Use Pthreads in preference to native code */
2948 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
2949 #define SELECTED_ONE_OPTION
2951 pthread_t the_thread;
2952 pthread_attr_t attrs;
2954 pthread_attr_init(&attrs);
2955 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
2956 errno = pthread_create(&the_thread, &attrs,
2957 (void * (*)(void *))serve, csp);
2958 child_id = errno ? -1 : 0;
2959 pthread_attr_destroy(&attrs);
2963 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
2964 #define SELECTED_ONE_OPTION
2965 child_id = _beginthread(
2966 (void (*)(void *))serve,
2971 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
2972 #define SELECTED_ONE_OPTION
2973 child_id = _beginthread(
2974 (void(* _Optlink)(void*))serve,
2980 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
2981 #define SELECTED_ONE_OPTION
2983 thread_id tid = spawn_thread
2984 (server_thread, "server", B_NORMAL_PRIORITY, csp);
2986 if ((tid >= 0) && (resume_thread(tid) == B_OK))
2988 child_id = (int) tid;
2997 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2998 #define SELECTED_ONE_OPTION
2999 csp->cfd = ReleaseSocket(csp->cfd, -1);
3002 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3003 NP_Output, Output(),
3004 NP_CloseOutput, FALSE,
3005 NP_Name, (ULONG)"privoxy child",
3009 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3010 NP_Output, Output(),
3011 NP_CloseOutput, FALSE,
3012 NP_Name, (ULONG)"privoxy child",
3013 NP_StackSize, 200*1024,
3019 ((struct Task *)child_id)->tc_UserData = csp;
3020 Signal((struct Task *)child_id, SIGF_SINGLE);
3025 #if !defined(SELECTED_ONE_OPTION)
3028 /* This block is only needed when using fork().
3029 * When using threads, the server thread was
3030 * created and run by the call to _beginthread().
3032 if (child_id == 0) /* child */
3035 #ifdef FEATURE_TOGGLE
3036 int inherited_toggle_state = global_toggle_state;
3037 #endif /* def FEATURE_TOGGLE */
3042 * If we've been toggled or we've blocked the request, tell Mom
3045 #ifdef FEATURE_TOGGLE
3046 if (inherited_toggle_state != global_toggle_state)
3048 rc |= RC_FLAG_TOGGLED;
3050 #endif /* def FEATURE_TOGGLE */
3052 #ifdef FEATURE_STATISTICS
3053 if (csp->flags & CSP_FLAG_REJECTED)
3055 rc |= RC_FLAG_BLOCKED;
3057 #endif /* ndef FEATURE_STATISTICS */
3061 else if (child_id > 0) /* parent */
3063 /* in a fork()'d environment, the parent's
3064 * copy of the client socket and the CSP
3068 #if !defined(_WIN32) && !defined(__CYGWIN__)
3070 wait( &child_status );
3073 * Evaluate child's return code: If the child has
3074 * - been toggled, toggle ourselves
3075 * - blocked its request, bump up the stats counter
3078 #ifdef FEATURE_TOGGLE
3079 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
3081 global_toggle_state = !global_toggle_state;
3083 #endif /* def FEATURE_TOGGLE */
3085 #ifdef FEATURE_STATISTICS
3087 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
3091 #endif /* def FEATURE_STATISTICS */
3093 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
3094 close_socket(csp->cfd);
3095 csp->flags &= ~CSP_FLAG_ACTIVE;
3099 #undef SELECTED_ONE_OPTION
3100 /* end of cpp switch () */
3102 if (child_id < 0) /* failed */
3104 char buf[BUFFER_SIZE];
3106 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
3108 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
3110 write_socket(csp->cfd, buf, strlen(buf));
3111 close_socket(csp->cfd);
3112 csp->flags &= ~CSP_FLAG_ACTIVE;
3123 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
3125 /* Clean up. Aim: free all memory (no leaks) */
3126 #ifdef FEATURE_GRACEFUL_TERMINATION
3128 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
3130 unload_current_config_file();
3131 unload_current_actions_file();
3132 unload_current_re_filterfile();
3133 #ifdef FEATURE_TRUST
3134 unload_current_trust_file();
3137 if (config->multi_threaded)
3144 } while ((clients->next != NULL) && (--i > 0));
3148 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
3159 #ifdef FEATURE_COOKIE_JAR
3160 if (NULL != config->jar)
3162 fclose(config->jar);
3166 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
3167 /* Cleanup - remove taskbar icon etc. */
3172 #endif /* FEATURE_GRACEFUL_TERMINATION */