1 const char jcc_rcs[] = "$Id: jcc.c,v 1.120 2007/01/26 14:18:42 fabiankeil Exp $";
2 /*********************************************************************
4 * File : $Source: /cvsroot/ijbswa/current/jcc.c,v $
6 * Purpose : Main file. Contains main() method, main loop, and
7 * the main connection-handling function.
9 * Copyright : Written by and Copyright (C) 2001-2007 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 1.120 2007/01/26 14:18:42 fabiankeil
37 * - Start to reduce chat()'s line count and move
38 * parts of it into separate functions.
39 * - Add "HTTP/1.1 100 Continue" hack for BR 756734.
41 * Revision 1.119 2007/01/25 14:02:30 fabiankeil
42 * - Add Proxy-Agent header to HTTP snippets that are
43 * supposed to reach HTTP clients only.
44 * - Made a few CONNECT log messages more descriptive.
45 * - Catch completely empty server responses (as seen
46 * with Tor's fake ".noconnect" top level domain).
47 * - Use shiny new "forwarding-failed" template for socks errors.
49 * Revision 1.118 2007/01/07 07:43:43 joergs
50 * AmigaOS4 support added.
52 * Revision 1.117 2006/12/31 17:56:37 fabiankeil
53 * Added config option accept-intercepted-requests
54 * and disabled it by default.
56 * Revision 1.116 2006/12/29 19:08:22 fabiankeil
57 * Reverted parts of my last commit
58 * to keep error handling working.
60 * Revision 1.115 2006/12/29 17:38:57 fabiankeil
61 * Fixed gcc43 conversion warnings.
63 * Revision 1.114 2006/12/27 18:52:02 fabiankeil
64 * Fix -pedantic ISO C warning about converting
65 * from function pointer to object pointer.
67 * Revision 1.113 2006/12/26 17:38:50 fabiankeil
68 * Silence compiler warning I introduced with my last commit.
70 * Revision 1.112 2006/12/26 17:31:41 fabiankeil
71 * Mutex protect rand() if POSIX threading
72 * is used, warn the user if that's not possible
73 * and stop using it on _WIN32 where it could
76 * Revision 1.111 2006/12/23 16:15:06 fabiankeil
77 * Don't prevent core dumps by catching SIGABRT.
78 * It's rude and makes debugging unreasonable painful.
80 * Revision 1.110 2006/12/13 14:52:53 etresoft
81 * Fix build failure on MacOS X. Global symbols can be either static or extern, but not both.
83 * Revision 1.109 2006/12/06 19:41:40 fabiankeil
84 * Privoxy is now able to run as intercepting
85 * proxy in combination with any packet filter
86 * that does the port redirection. The destination
87 * is extracted from the "Host:" header which
88 * should be available for nearly all requests.
90 * Moved HTTP snipplets into jcc.c.
91 * Added error message for gopher proxy requests.
93 * Revision 1.108 2006/11/28 15:38:51 fabiankeil
94 * Only unlink the pidfile if it's actually used.
96 * Change order of interception checks to make
97 * it possible to block or redirect requests for
100 * Revision 1.107 2006/11/13 19:05:51 fabiankeil
101 * Make pthread mutex locking more generic. Instead of
102 * checking for OSX and OpenBSD, check for FEATURE_PTHREAD
103 * and use mutex locking unless there is an _r function
104 * available. Better safe than sorry.
106 * Fixes "./configure --disable-pthread" and should result
107 * in less threading-related problems on pthread-using platforms,
108 * but it still doesn't fix BR#1122404.
110 * Revision 1.106 2006/11/06 19:58:23 fabiankeil
111 * Move pthread.h inclusion from jcc.c to jcc.h.
112 * Fixes build on x86-freebsd1 (FreeBSD 5.4-RELEASE).
114 * Revision 1.105 2006/11/06 14:26:02 fabiankeil
115 * Don't exit after receiving the second SIGHUP on Solaris.
117 * Fixes BR 1052235, but the same problem may exist on other
118 * systems. Once 3.0.6 is out we should use sigset()
119 * where available and see if it breaks anything.
121 * Revision 1.104 2006/09/23 13:26:38 roro
122 * Replace TABs by spaces in source code.
124 * Revision 1.103 2006/09/21 12:54:43 fabiankeil
125 * Fix +redirect{}. Didn't work with -fast-redirects.
127 * Revision 1.102 2006/09/06 13:03:04 fabiankeil
128 * Respond with 400 and a short text message
129 * if the client tries to use Privoxy as FTP proxy.
131 * Revision 1.101 2006/09/06 09:23:37 fabiankeil
132 * Make number of retries in case of forwarded-connect problems
133 * a config file option (forwarded-connect-retries) and use 0 as
136 * Revision 1.100 2006/09/03 19:42:59 fabiankeil
137 * Set random(3) seed.
139 * Revision 1.99 2006/09/02 15:36:42 fabiankeil
140 * Follow the OpenBSD port's lead and protect the resolve
141 * functions on OpenBSD as well.
143 * Revision 1.98 2006/08/24 11:01:34 fabiankeil
144 * --user fix. Only use the user as group if no group is specified.
145 * Solves BR 1492612. Thanks to Spinor S. and David Laight.
147 * Revision 1.97 2006/08/18 15:23:17 david__schmidt
148 * Windows service (re-)integration
152 * --install[:service_name]
153 * --uninstall[:service_name]
156 * They work as follows:
157 * --install will create a service for you and then terminate.
158 * By default the service name will be "privoxy" (without the quotes).
159 * However you can run multiple services if you wish, just by adding
160 * a colon and then a name (no spaces).
162 * --uninstall follows the exact same rules a --install.
164 * --service is used when the program is executed by the service
165 * control manager, and in normal circumstances would never be
166 * used as a command line argument.
168 * Revision 1.96 2006/08/15 20:12:36 david__schmidt
169 * Windows service integration
171 * Revision 1.95 2006/08/03 02:46:41 david__schmidt
172 * Incorporate Fabian Keil's patch work:
173 http://www.fabiankeil.de/sourcecode/privoxy/
175 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
176 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
177 * with what was really the latest development (the v_3_0_branch branch)
179 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
180 * Thanks to Jindrich Makovicka for a race condition fix for the log
181 * file. The race condition remains for non-pthread implementations.
182 * Reference patch #1175720.
184 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
185 * Add the ability to check jpeg images for invalid
186 * lengths of comment blocks. Defensive strategy
187 * against the exploit:
188 * Microsoft Security Bulletin MS04-028
189 * Buffer Overrun in JPEG Processing (GDI+) Could
190 * Allow Code Execution (833987)
191 * Enabled with +inspect-jpegs in actions files.
193 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
194 * - Fixed usage info for non-unix platforms
195 * - Fixed small cmdline parsing bug
197 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
198 * Diagnostics: Now preserve the returncode of pthread_create
199 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
201 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
202 * No longer ignore SIGCHLD. Fixes bug #769381
204 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
205 * Close jarfile on graceful exit, remove stray line
207 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
208 * Cosmetics: Killed a warning, a typo and an allocation left at exit
210 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
211 * No longer rely on non-POSIX.1 extensions of getcwd().
214 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
215 * Replaced setenv() by posix-compliant putenv()
216 * Thanks to Neil McCalden (nmcc AT users.sf.net).
218 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
219 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
221 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
222 * Clean-up and extension of improvements for forked mode:
223 * - Child's return code now consists of flags RC_FLAG_*
224 * - Reporting toggle to parent now properly #ifdef'ed
225 * - Children now report blocking to parent. This enables
226 * statistics in forked mode
228 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
229 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
230 * Children now report having been toggled through _exit(17), parents
231 * watch for that code and toggle themselves if found.
233 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
234 * Wrapping all *_r functions (the non-_r versions of them) with
235 * mutex semaphores for OSX. Hopefully this will take care of all
236 * of those pesky crash reports.
238 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
239 * Fixed two mostly harmless mem leaks
241 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
242 * Fix: Head of global clients list now initialized to NULL
244 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
245 * Added basic support for OPTIONS and TRACE HTTP methods:
246 * - New interceptor direct_response() added in chat().
247 * - sed() moved to earlier in the process, so that the
248 * Host: header is evaluated before actions and forwarding
251 * Revision 1.92 2002/05/08 16:00:46 oes
252 * Chat's buffer handling:
253 * - Fixed bug with unchecked out-of-mem conditions
254 * while reading client request & server headers
255 * - No longer predict if the buffer limit will be exceeded
256 * in the next read -- check add_to_iob's new
257 * return code. If buffer couldn't be extended
258 * (policy or out-of-mem) while
259 * - reading from client: abort
260 * - reading server headers: send error page
261 * - buffering server body for filter: flush,
262 * and if that fails: send error page
264 * Revision 1.91 2002/04/08 20:35:58 swa
267 * Revision 1.90 2002/04/02 14:57:28 oes
268 * Made sending wafers independent of FEATURE_COOKIE_JAR
270 * Revision 1.89 2002/03/31 17:18:59 jongfoster
271 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
273 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
274 * More compiler warning message maintenance
276 * Revision 1.87 2002/03/26 22:29:54 swa
277 * we have a new homepage!
279 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
280 * Workaround for closing the jarfile before load_config() comes around again
282 * Revision 1.85 2002/03/24 15:23:33 jongfoster
285 * Revision 1.84 2002/03/24 13:25:43 swa
286 * name change related issues
288 * Revision 1.83 2002/03/16 23:54:06 jongfoster
289 * Adding graceful termination feature, to help look for memory leaks.
290 * If you enable this (which, by design, has to be done by hand
291 * editing config.h) and then go to http://i.j.b/die, then the program
292 * will exit cleanly after the *next* request. It should free all the
293 * memory that was used.
295 * Revision 1.82 2002/03/13 00:27:05 jongfoster
298 * Revision 1.81 2002/03/12 01:42:50 oes
299 * Introduced modular filters
301 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
302 * OS/2 port maintenance:
303 * - Fixed EMX build - it had decayed a little
304 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
305 * substituted a memset for now.
307 * Revision 1.79 2002/03/09 20:03:52 jongfoster
308 * - Making various functions return int rather than size_t.
309 * (Undoing a recent change). Since size_t is unsigned on
310 * Windows, functions like read_socket that return -1 on
311 * error cannot return a size_t.
313 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
314 * crashes, and also frequently caused JB to jump to 100%
315 * CPU and stay there. (Because it thought it had just
316 * read ((unsigned)-1) == 4Gb of data...)
318 * - The signature of write_socket has changed, it now simply
319 * returns success=0/failure=nonzero.
321 * - Trying to get rid of a few warnings --with-debug on
322 * Windows, I've introduced a new type "jb_socket". This is
323 * used for the socket file descriptors. On Windows, this
324 * is SOCKET (a typedef for unsigned). Everywhere else, it's
325 * an int. The error value can't be -1 any more, so it's
326 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
327 * Windows it maps to the #define INVALID_SOCKET.)
329 * - The signature of bind_port has changed.
331 * Revision 1.78 2002/03/08 21:35:04 oes
332 * Added optional group supplement to --user option. Will now use default group of user if no group given
334 * Revision 1.77 2002/03/07 03:52:06 oes
335 * - Fixed compiler warnings etc
336 * - Improved handling of failed DNS lookups
338 * Revision 1.76 2002/03/06 22:54:35 jongfoster
339 * Automated function-comment nitpicking.
341 * Revision 1.75 2002/03/06 10:02:19 oes
342 * Fixed stupid bug when --user was not given
344 * Revision 1.74 2002/03/06 00:49:31 jongfoster
345 * Fixing warning on Windows
346 * Making #ifdefs that refer to the same variable consistently
347 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
349 * Revision 1.73 2002/03/05 23:57:30 hal9
350 * Stray character 's' on line 1618 was breaking build.
352 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
353 * - Re-enable OS/2 building after new parms were added
354 * - Fix false out of memory report when resolving CGI templates when no IP
355 * address is available of failed attempt (a la no such domain)
357 * Revision 1.71 2002/03/05 18:13:56 oes
358 * Added --user option
360 * Revision 1.70 2002/03/05 04:52:42 oes
361 * Deleted non-errlog debugging code
363 * Revision 1.69 2002/03/04 23:50:00 jongfoster
364 * Splitting off bind_port() call into bind_port_helper(), with
367 * Revision 1.68 2002/03/04 20:17:32 oes
370 * Revision 1.67 2002/03/04 18:18:57 oes
371 * - Removed _DEBUG mode
372 * - Cleand up cmdline parsing
373 * - Introduced --no-daemon, --pidfile options
374 * - Cleaned up signal handling:
375 * - Terminate cleanly on INT, TERM and ABRT
376 * - Schedule logfile for re-opening on HUP
377 * - Ignore CHLD and PIPE
378 * - Leave the rest with their default handlers
379 * - Uniform handler registration
380 * - Added usage() function
381 * - Played styleguide police
383 * Revision 1.66 2002/03/03 15:06:55 oes
384 * Re-enabled automatic config reloading
386 * Revision 1.65 2002/03/03 14:49:11 oes
387 * Fixed CLF logging: Now uses client's original HTTP request
389 * Revision 1.64 2002/03/03 09:18:03 joergs
390 * Made jumbjuster work on AmigaOS again.
392 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
393 * Clean up a little CRLF unpleasantness that suddenly appeared
395 * Revision 1.62 2002/02/20 23:17:23 jongfoster
396 * Detecting some out-of memory conditions and exiting with a log message.
398 * Revision 1.61 2002/01/17 21:01:52 jongfoster
399 * Moving all our URL and URL pattern parsing code to urlmatch.c.
401 * Revision 1.60 2001/12/30 14:07:32 steudten
402 * - Add signal handling (unix)
403 * - Add SIGHUP handler (unix)
404 * - Add creation of pidfile (unix)
405 * - Add action 'top' in rc file (RH)
406 * - Add entry 'SIGNALS' to manpage
407 * - Add exit message to logfile (unix)
409 * Revision 1.59 2001/12/13 14:07:18 oes
410 * Fixed Bug: 503 error page now sent OK
412 * Revision 1.58 2001/11/30 23:37:24 jongfoster
413 * Renaming the Win32 config file to config.txt - this is almost the
414 * same as the corresponding UNIX name "config"
416 * Revision 1.57 2001/11/16 00:47:43 jongfoster
417 * Changing the tty-disconnection code to use setsid().
419 * Revision 1.56 2001/11/13 20:20:54 jongfoster
420 * Tabs->spaces, fixing a bug with missing {} around an if()
422 * Revision 1.55 2001/11/13 20:14:53 jongfoster
423 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
425 * Revision 1.54 2001/11/07 00:03:14 steudten
426 * Give reliable return value if an error
427 * occurs not just 0 with new daemon mode.
429 * Revision 1.53 2001/11/05 21:41:43 steudten
430 * Add changes to be a real daemon just for unix os.
431 * (change cwd to /, detach from controlling tty, set
432 * process group and session leader to the own process.
434 * Add some fatal-error log message for failed malloc().
435 * Add '-d' if compiled with 'configure --with-debug' to
436 * enable debug output.
438 * Revision 1.52 2001/10/26 20:11:20 jongfoster
439 * Fixing type mismatch
441 * Revision 1.51 2001/10/26 17:38:28 oes
444 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
445 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
446 * threads to call select() simultaneously. So, it's time to do a real, live,
447 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
448 * (native). Both versions will work, but using __OS2__ offers multi-threading.
450 * Revision 1.49 2001/10/23 21:41:35 jongfoster
451 * Added call to initialize the (statically-allocated of course)
452 * "out of memory" CGI response.
454 * Revision 1.48 2001/10/10 19:56:46 jongfoster
455 * Moving some code that wasn't cookie-related out of an #ifdef
458 * Revision 1.47 2001/10/10 16:44:36 oes
459 * Added CONNECT destination port limitation check
461 * Revision 1.46 2001/10/08 15:17:41 oes
462 * Re-enabled SSL forwarding
464 * Revision 1.45 2001/10/07 15:42:11 oes
465 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
467 * Moved downgrading of the HTTP version from parse_http_request to
468 * chat(), since we can't decide if it is necessary before we have
469 * determined the actions for the URL. The HTTP command is now
470 * *always* re-built so the repairs need no longer be special-cased.
472 * filter_popups now gets a csp pointer so it can raise the new
473 * CSP_FLAG_MODIFIED flag.
477 * Added configurable size limit for the IOB. If the IOB grows so
478 * large that the next read would exceed the limit, the header
479 * is generated, and the header & unfiltered buffer are flushed
480 * to the client. Chat then continues in non-buffering,
481 * non-filtering body mode.
483 * Revision 1.44 2001/10/02 18:13:57 oes
486 * Revision 1.43 2001/10/02 15:32:13 oes
487 * Moved generation of hdr
489 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
490 * Cleaning up 2 compiler warnings on OS/2.
492 * Revision 1.41 2001/09/16 17:05:14 jongfoster
493 * Removing unused #include showarg.h
495 * Revision 1.40 2001/09/16 15:41:45 jongfoster
496 * Fixing signed/unsigned comparison warning.
498 * Revision 1.39 2001/09/16 13:21:27 jongfoster
499 * Changes to use new list functions.
501 * Revision 1.38 2001/09/16 13:01:46 jongfoster
502 * Removing redundant function call that zeroed zalloc()'d memory.
504 * Revision 1.37 2001/09/10 11:12:24 oes
505 * Deleted unused variable
507 * Revision 1.36 2001/09/10 10:56:15 oes
508 * Silenced compiler warnings
510 * Revision 1.35 2001/07/31 14:44:22 oes
511 * Deleted unused size parameter from filter_popups()
513 * Revision 1.34 2001/07/30 22:08:36 jongfoster
514 * Tidying up #defines:
515 * - All feature #defines are now of the form FEATURE_xxx
516 * - Permanently turned off WIN_GUI_EDIT
517 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
519 * Revision 1.33 2001/07/29 19:32:00 jongfoster
520 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
522 * Revision 1.32 2001/07/29 18:47:05 jongfoster
523 * Adding missing #include "loadcfg.h"
525 * Revision 1.31 2001/07/29 12:17:48 oes
526 * Applied pthread fix by Paul Lieverse
528 * Revision 1.30 2001/07/25 22:57:13 jongfoster
529 * __BEOS__ no longer overrides FEATURE_PTHREAD.
530 * This is because FEATURE_PTHREAD will soon be widely used, so I
531 * want to keep it simple.
533 * Revision 1.29 2001/07/24 12:47:06 oes
534 * Applied BeOS support update by Eugenia
536 * Revision 1.28 2001/07/23 13:26:12 oes
537 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
539 * Revision 1.27 2001/07/19 19:09:47 haroon
540 * - Added code to take care of the situation where while processing the first
541 * server response (which includes the server header), after finding the end
542 * of the headers we were not looking past the end of the headers for
543 * content modification. I enabled it for filter_popups.
544 * Someone else should look to see if other similar operations should be
545 * done to the discarded portion of the buffer.
547 * Note 2001/07/20: No, the other content modification mechanisms will process
548 * the whole iob later anyway. --oes
550 * Revision 1.26 2001/07/18 12:31:36 oes
553 * Revision 1.25 2001/07/15 19:43:49 jongfoster
554 * Supports POSIX threads.
555 * Also removed some unused #includes.
557 * Revision 1.24 2001/07/13 14:00:40 oes
558 * - Generic content modification scheme:
559 * Each feature has its own applicability flag that is set
560 * from csp->action->flags.
561 * Replaced the "filtering" int flag , by a function pointer
562 * "content_filter" to the function that will do the content
563 * modification. If it is != NULL, the document will be buffered
564 * and processed through *content_filter, which must set
565 * csp->content_length and return a modified copy of the body
566 * or return NULL (on failiure).
567 * - Changed csp->is_text to the more generic bitmap csp->content_type
568 * which can currently take the valued CT_TEXT or CT_GIF
570 * - Removed all #ifdef PCRS
572 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
573 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
574 * the `block_acl' call. This prevents a compilation error when the user
575 * does not wish to use the "ACL" feature.
577 * Revision 1.22 2001/06/29 21:45:41 oes
578 * Indentation, CRLF->LF, Tab-> Space
580 * Revision 1.21 2001/06/29 13:29:36 oes
581 * - Cleaned up, improved comments
582 * - Unified all possible interceptors (CGI,
583 * block, trust, fast_redirect) in one
584 * place, with one (CGI) answer generation
585 * mechansim. Much clearer now.
586 * - Removed the GIF image generation, which
587 * is now done in filters.c:block_url()
588 * - Made error conditions like domain lookup
589 * failiure or (various) problems while talking
590 * to the server use cgi.c:error_response()
591 * instead of generating HTML/HTTP in chat() (yuck!)
592 * - Removed logentry from cancelled commit
594 * Revision 1.20 2001/06/09 10:55:28 jongfoster
595 * Changing BUFSIZ ==> BUFFER_SIZE
597 * Revision 1.19 2001/06/07 23:12:52 jongfoster
598 * Replacing function pointer in struct gateway with a directly
599 * called function forwarded_connect().
600 * Replacing struct gateway with struct forward_spec
602 * Revision 1.18 2001/06/03 19:12:16 oes
603 * introduced new cgi handling
605 * Revision 1.17 2001/06/01 20:07:23 jongfoster
606 * Now uses action +image-blocker{} rather than config->tinygif
608 * Revision 1.16 2001/06/01 18:49:17 jongfoster
609 * Replaced "list_share" with "list" - the tiny memory gain was not
610 * worth the extra complexity.
612 * Revision 1.15 2001/05/31 21:24:47 jongfoster
613 * Changed "permission" to "action" throughout.
614 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
615 * Moved vanilla wafer check into chat(), since we must now
616 * decide whether or not to add it based on the URL.
618 * Revision 1.14 2001/05/29 20:14:01 joergs
619 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
622 * Revision 1.13 2001/05/29 09:50:24 jongfoster
623 * Unified blocklist/imagelist/permissionslist.
624 * File format is still under discussion, but the internal changes
627 * Also modified interceptor behaviour:
628 * - We now intercept all URLs beginning with one of the following
629 * prefixes (and *only* these prefixes):
631 * * http://ijbswa.sf.net/config/
632 * * http://ijbswa.sourceforge.net/config/
633 * - New interceptors "home page" - go to http://i.j.b/ to see it.
634 * - Internal changes so that intercepted and fast redirect pages
635 * are not replaced with an image.
636 * - Interceptors now have the option to send a binary page direct
637 * to the client. (i.e. ijb-send-banner uses this)
638 * - Implemented show-url-info interceptor. (Which is why I needed
639 * the above interceptors changes - a typical URL is
640 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
641 * The previous mechanism would not have intercepted that, and
642 * if it had been intercepted then it then it would have replaced
645 * Revision 1.12 2001/05/27 22:17:04 oes
647 * - re_process_buffer no longer writes the modified buffer
648 * to the client, which was very ugly. It now returns the
649 * buffer, which it is then written by chat.
651 * - content_length now adjusts the Content-Length: header
652 * for modified documents rather than crunch()ing it.
653 * (Length info in csp->content_length, which is 0 for
654 * unmodified documents)
656 * - For this to work, sed() is called twice when filtering.
658 * Revision 1.11 2001/05/26 17:27:53 jongfoster
659 * Added support for CLF and fixed LOG_LEVEL_LOG.
660 * Also did CRLF->LF fix of my previous patch.
662 * Revision 1.10 2001/05/26 15:26:15 jongfoster
663 * ACL feature now provides more security by immediately dropping
664 * connections from untrusted hosts.
666 * Revision 1.9 2001/05/26 00:28:36 jongfoster
667 * Automatic reloading of config file.
668 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
669 * Most of the global variables have been moved to a new
670 * struct configuration_spec, accessed through csp->config->globalname
671 * Most of the globals remaining are used by the Win32 GUI.
673 * Revision 1.8 2001/05/25 22:43:18 jongfoster
674 * Fixing minor memory leak and buffer overflow.
676 * Revision 1.7 2001/05/25 22:34:30 jongfoster
679 * Revision 1.6 2001/05/23 00:13:58 joergs
680 * AmigaOS support fixed.
682 * Revision 1.5 2001/05/22 18:46:04 oes
684 * - Enabled filtering banners by size rather than URL
685 * by adding patterns that replace all standard banner
686 * sizes with the "Junkbuster" gif to the re_filterfile
688 * - Enabled filtering WebBugs by providing a pattern
689 * which kills all 1x1 images
691 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
692 * which is selected by the (nonstandard and therefore
693 * capital) letter 'U' in the option string.
694 * It causes the quantifiers to be ungreedy by default.
695 * Appending a ? turns back to greedy (!).
697 * - Added a new interceptor ijb-send-banner, which
698 * sends back the "Junkbuster" gif. Without imagelist or
699 * MSIE detection support, or if tinygif = 1, or the
700 * URL isn't recognized as an imageurl, a lame HTML
701 * explanation is sent instead.
703 * - Added new feature, which permits blocking remote
704 * script redirects and firing back a local redirect
706 * The feature is conditionally compiled, i.e. it
707 * can be disabled with --disable-fast-redirects,
708 * plus it must be activated by a "fast-redirects"
709 * line in the config file, has its own log level
710 * and of course wants to be displayed by show-proxy-args
711 * Note: Boy, all the #ifdefs in 1001 locations and
712 * all the fumbling with configure.in and acconfig.h
713 * were *way* more work than the feature itself :-(
715 * - Because a generic redirect template was needed for
716 * this, tinygif = 3 now uses the same.
718 * - Moved GIFs, and other static HTTP response templates
723 * - Removed some >400 CRs again (Jon, you really worked
726 * Revision 1.4 2001/05/21 19:34:01 jongfoster
727 * Made failure to bind() a fatal error.
729 * Revision 1.3 2001/05/20 01:21:20 jongfoster
730 * Version 2.9.4 checkin.
731 * - Merged popupfile and cookiefile, and added control over PCRS
732 * filtering, in new "permissionsfile".
733 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
734 * file error you now get a message box (in the Win32 GUI) rather
735 * than the program exiting with no explanation.
736 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
738 * - Removed tabs from "config"
739 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
740 * - Bumped up version number.
742 * Revision 1.2 2001/05/17 22:34:44 oes
743 * - Added hint on GIF char array generation to jcc.c
744 * - Cleaned CRLF's from the sources and related files
745 * - Repaired logging for REF and FRC
747 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
748 * Initial import of version 2.9.3 source tree
751 *********************************************************************/
757 #include <sys/types.h>
765 # ifndef FEATURE_PTHREAD
769 # include <windows.h>
770 # include <process.h>
771 # endif /* ndef FEATURE_PTHREAD */
774 # ifndef _WIN_CONSOLE
776 # endif /* ndef _WIN_CONSOLE */
777 # include "w32svrapi.h"
779 #else /* ifndef _WIN32 */
781 # if !defined (__OS2__)
783 # include <sys/wait.h>
784 # endif /* ndef __OS2__ */
785 # include <sys/time.h>
786 # include <sys/stat.h>
787 # include <sys/ioctl.h>
790 #include <sys/termios.h>
801 # include <socket.h> /* BeOS has select() for sockets only. */
802 # include <OS.h> /* declarations for threads and stuff. */
805 # if defined(__EMX__) || defined(__OS2__)
806 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
811 #define bzero(B,N) memset(B,0x00,n)
826 #include "killpopup.h"
827 #include "miscutil.h"
829 #include "jbsockets.h"
834 #include "urlmatch.h"
836 const char jcc_h_rcs[] = JCC_H_VERSION;
837 const char project_h_rcs[] = PROJECT_H_VERSION;
840 struct client_state clients[1];
841 struct file_list files[1];
843 #ifdef FEATURE_STATISTICS
844 int urls_read = 0; /* total nr of urls read inc rejected */
845 int urls_rejected = 0; /* total nr of urls rejected */
846 #endif /* def FEATURE_STATISTICS */
848 #ifdef FEATURE_GRACEFUL_TERMINATION
852 static void listen_loop(void);
853 static void chat(struct client_state *csp);
855 void serve(struct client_state *csp);
856 #else /* ifndef AMIGA */
857 static void serve(struct client_state *csp);
858 #endif /* def AMIGA */
861 static int32 server_thread(void *data);
862 #endif /* def __BEOS__ */
865 #define sleep(N) Sleep(((N) * 1000))
869 #define sleep(N) DosSleep(((N) * 100))
872 #ifdef FEATURE_PTHREAD
873 pthread_mutex_t log_mutex;
874 pthread_mutex_t log_init_mutex;
876 #ifndef HAVE_GMTIME_R
877 pthread_mutex_t gmtime_mutex;
878 #endif /* ndef HAVE_GMTIME_R */
880 #ifndef HAVE_LOCALTIME_R
881 pthread_mutex_t localtime_mutex;
882 #endif /* ndef HAVE_GMTIME_R */
884 #ifndef HAVE_GETHOSTBYADDR_R
885 pthread_mutex_t gethostbyaddr_mutex;
886 #endif /* ndef HAVE_GETHOSTBYADDR_R */
888 #ifndef HAVE_GETHOSTBYNAME_R
889 pthread_mutex_t gethostbyname_mutex;
890 #endif /* ndef HAVE_GETHOSTBYNAME_R */
893 pthread_mutex_t rand_mutex;
894 #endif /* ndef HAVE_RANDOM */
896 #endif /* FEATURE_PTHREAD */
898 #if defined(unix) || defined(__EMX__)
899 const char *basedir = NULL;
900 const char *pidfile = NULL;
901 int received_hup_signal = 0;
902 #endif /* defined unix */
904 /* The vanilla wafer. */
905 static const char VANILLA_WAFER[] =
906 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
907 "Do_not_send_me_any_copyrighted_information_other_than_the_"
908 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
909 "In_particular_do_not_send_me_any_cookies_that_"
910 "are_subject_to_a_claim_of_copyright_by_anybody._"
911 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
912 "(copyright_or_otherwise)_applying_to_any_cookie._";
914 /* HTTP snipplets. */
915 const char CSUCCEED[] =
916 "HTTP/1.0 200 Connection established\n"
917 "Proxy-Agent: Privoxy/" VERSION "\r\n\r\n";
919 const char CHEADER[] =
920 "HTTP/1.0 400 Invalid header received from browser\r\n"
921 "Connection: close\r\n\r\n"
922 "Invalid header received from browser.\r\n";
924 const char CFORBIDDEN[] =
925 "HTTP/1.0 403 Connection not allowable\r\n"
926 "Proxy-Agent: Privoxy " VERSION "\r\n"
927 "X-Hint: If you read this message interactively, then you know why this happens ,-)\r\n"
928 "Connection: close\r\n\r\n";
930 const char FTP_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 FTP.\r\n";
935 const char GOPHER_RESPONSE[] =
936 "HTTP/1.0 400 Invalid request received from browser\r\n"
937 "Connection: close\r\n\r\n"
938 "Invalid request. Privoxy doesn't support gopher.\r\n";
940 /* XXX: should be a template */
941 const char MISSING_DESTINATION_RESPONSE[] =
942 "HTTP/1.0 400 Bad request received from browser\r\n"
943 "Proxy-Agent: Privoxy " VERSION "\r\n"
944 "Connection: close\r\n\r\n"
945 "Bad request. Privoxy was unable to extract the destination.\r\n";
947 /* XXX: should be a template */
948 const char NO_SERVER_DATA_RESPONSE[] =
949 "HTTP/1.0 502 Server or forwarder response empty\r\n"
950 "Proxy-Agent: Privoxy " VERSION "\r\n"
951 "Connection: close\r\n\r\n"
952 "Empty server or forwarder response.\r\n"
953 "The connection was closed without sending any data.\r\n";
955 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
956 /*********************************************************************
958 * Function : sig_handler
960 * Description : Signal handler for different signals.
961 * Exit gracefully on TERM and INT
962 * or set a flag that will cause the errlog
963 * to be reopened by the main thread on HUP.
966 * 1 : the_signal = the signal cause this function to call
970 *********************************************************************/
971 static void sig_handler(int the_signal)
977 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
988 received_hup_signal = 1;
993 * We shouldn't be here, unless we catch signals
994 * in main() that we can't handle here!
996 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
1004 /*********************************************************************
1006 * Function : client_protocol_is_unsupported
1008 * Description : Checks if the client used a known unsupported
1009 * protocol and deals with it by sending an error
1013 * 1 : csp = Current client state (buffers, headers, etc...)
1014 * 2 : req = the first request line send by the client
1016 * Returns : TRUE if an error response has been generated, or
1017 * FALSE if the request doesn't look invalid.
1019 *********************************************************************/
1020 int client_protocol_is_unsupported(const struct client_state *csp, char *req)
1022 char buf[BUFFER_SIZE];
1025 * If it's a FTP or gopher request, we don't support it.
1027 * These checks are better than nothing, but they might
1028 * not work in all configurations and some clients might
1029 * have problems digesting the answer.
1031 * They should, however, never cause more problems than
1032 * Privoxy's old behaviour (returning the misleading HTML
1035 * "Could not resolve http://(ftp|gopher)://example.org").
1037 if (!strncmpic(req, "GET ftp://", 10) || !strncmpic(req, "GET gopher://", 13))
1039 if (!strncmpic(req, "GET ftp://", 10))
1041 strcpy(buf, FTP_RESPONSE);
1042 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as FTP proxy: %s",
1043 csp->ip_addr_str, req);
1047 strcpy(buf, GOPHER_RESPONSE);
1048 log_error(LOG_LEVEL_ERROR, "%s tried to use Privoxy as gopher proxy: %s",
1049 csp->ip_addr_str, req);
1051 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0", csp->ip_addr_str, req);
1053 write_socket(csp->cfd, buf, strlen(buf));
1062 /*********************************************************************
1064 * Function : get_request_destination_elsewhere
1066 * Description : If the client's request was redirected into
1067 * Privoxy without the client's knowledge,
1068 * the request line lacks the destination host.
1070 * This function tries to get it elsewhere,
1071 * provided accept-intercepted-requests is enabled.
1073 * "Elsewhere" currently only means "Host: header",
1074 * but in the future we may ask the redirecting
1075 * packet filter to look the destination up.
1077 * If the destination stays unknown, an error
1078 * response is send to the client and headers
1079 * are freed so that chat() can return directly.
1082 * 1 : csp = Current client state (buffers, headers, etc...)
1083 * 2 : headers = a header list
1085 * Returns : JB_ERR_OK if the destination is now known, or
1086 * JB_ERR_PARSE if it isn't.
1088 *********************************************************************/
1089 jb_err get_request_destination_elsewhere(struct client_state *csp, struct list *headers)
1091 char buf[BUFFER_SIZE];
1094 if (!(csp->config->feature_flags & RUNTIME_FEATURE_ACCEPT_INTERCEPTED_REQUESTS))
1096 log_error(LOG_LEVEL_ERROR, "%s's request: \'%s\' is invalid."
1097 " Privoxy isn't configured to accept intercepted requests.",
1098 csp->ip_addr_str, csp->http->cmd);
1099 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1100 csp->ip_addr_str, csp->http->cmd);
1102 strcpy(buf, CHEADER);
1103 write_socket(csp->cfd, buf, strlen(buf));
1104 destroy_list(headers);
1106 return JB_ERR_PARSE;
1108 else if (JB_ERR_OK == get_destination_from_headers(headers, csp->http))
1110 /* Split the domain we just got for pattern matching */
1111 init_domain_components(csp->http);
1117 /* We can't work without destination. Go spread the news.*/
1119 req = list_to_text(headers);
1121 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 400 0",
1122 csp->ip_addr_str, csp->http->cmd);
1123 log_error(LOG_LEVEL_ERROR,
1124 "Privoxy was unable to get the destination for %s's request:\n%s\n%s",
1125 csp->ip_addr_str, csp->http->cmd, req);
1128 strcpy(buf, MISSING_DESTINATION_RESPONSE);
1129 write_socket(csp->cfd, buf, strlen(buf));
1130 destroy_list(headers);
1132 return JB_ERR_PARSE;
1135 * TODO: If available, use PF's ioctl DIOCNATLOOK as last resort
1136 * to get the destination IP address, use it as host directly
1137 * or do a reverse DNS lookup first.
1142 /*********************************************************************
1144 * Function : get_server_headers
1146 * Description : Parses server headers in iob and fills them
1147 * into csp->headers so that they can later be
1151 * 1 : csp = Current client state (buffers, headers, etc...)
1153 * Returns : JB_ERR_OK if everything went fine, or
1154 * JB_ERR_PARSE if the headers were incomplete.
1156 *********************************************************************/
1157 jb_err get_server_headers(struct client_state *csp)
1159 int continue_hack_in_da_house = 0;
1162 while (((header = get_header(csp)) != NULL) || continue_hack_in_da_house)
1167 * continue hack in da house. Ignore the ending of
1168 * this head and continue enlisting header lines.
1169 * The reason is described below.
1171 enlist(csp->headers, "");
1172 continue_hack_in_da_house = 0;
1175 else if (0 == strncmpic(header, "HTTP/1.1 100", 12))
1178 * It's a bodyless continue response, don't
1179 * stop header parsing after reaching it's end.
1181 * As a result Privoxy will concatenate the
1182 * next response's head and parse and deliver
1183 * the headers as if they belonged to one request.
1185 * The client will separate them because of the
1186 * empty line between them.
1188 * XXX: What we're doing here is clearly against
1189 * the intended purpose of the continue header,
1190 * and under some conditions (HTTP/1.0 client request)
1191 * it's a standard violation.
1193 * Anyway, "sort of against the spec" is preferable
1194 * to "always getting confused by Continue responses"
1195 * (Privoxy's behaviour before this hack was added)
1197 log_error(LOG_LEVEL_HEADER, "Continue hack in da house.");
1198 continue_hack_in_da_house = 1;
1200 else if (*header == '\0')
1203 * If the header is empty, but the Continue hack
1204 * isn't active, we can assume that we reached the
1205 * end of the buffer before we hit the end of the
1208 * Inform the caller an let it decide how to handle it.
1210 return JB_ERR_PARSE;
1214 if (JB_ERR_MEMORY == enlist(csp->headers, header))
1217 * XXX: Should we quit the request and return a
1218 * out of memory error page instead?
1220 log_error(LOG_LEVEL_ERROR,
1221 "Out of memory while enlisting server headers. %s lost.",
1231 /*********************************************************************
1235 * Description : Once a connection to the client has been accepted,
1236 * this function is called (via serve()) to handle the
1237 * main business of the communication. When this
1238 * function returns, the caller must close the client
1241 * FIXME: chat is nearly thousand lines long.
1245 * 1 : csp = Current client state (buffers, headers, etc...)
1247 * Returns : On success, the number of bytes written are returned (zero
1248 * indicates nothing was written). On error, -1 is returned,
1249 * and errno is set appropriately. If count is zero and the
1250 * file descriptor refers to a regular file, 0 will be
1251 * returned without causing any other effect. For a special
1252 * file, the results are not portable.
1254 *********************************************************************/
1255 static void chat(struct client_state *csp)
1258 * This next lines are a little ugly, but they simplifies the if statements
1259 * below. Basically if TOGGLE, then we want the if to test if the
1260 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
1261 * then we want the if to test for CSP_FLAG_FORCED , else we don't
1263 #ifdef FEATURE_TOGGLE
1264 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
1265 #else /* ifndef FEATURE_TOGGLE */
1266 # define IS_TOGGLED_ON_AND
1267 #endif /* ndef FEATURE_TOGGLE */
1268 #ifdef FEATURE_FORCE_LOAD
1269 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
1270 #else /* ifndef FEATURE_FORCE_LOAD */
1271 # define IS_NOT_FORCED_AND
1272 #endif /* def FEATURE_FORCE_LOAD */
1274 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
1276 char buf[BUFFER_SIZE];
1284 int ms_iis5_hack = 0;
1285 size_t byte_count = 0;
1286 int forwarded_connect_retries = 0;
1287 int max_forwarded_connect_retries = csp->config->forwarded_connect_retries;
1288 const struct forward_spec * fwd;
1289 struct http_request *http;
1290 int len; /* for buffer sizes (and negative error codes) */
1291 #ifdef FEATURE_KILL_POPUPS
1292 int block_popups; /* bool, 1==will block popups */
1293 int block_popups_now = 0; /* bool, 1==currently blocking popups */
1294 #endif /* def FEATURE_KILL_POPUPS */
1296 int pcrs_filter; /* bool, 1==will filter through pcrs */
1297 int gif_deanimate; /* bool, 1==will deanimate gifs */
1298 int jpeg_inspect; /* bool, 1==will inspect jpegs */
1300 /* Function that does the content filtering for the current request */
1301 char *(*content_filter)() = NULL;
1303 /* Skeleton for HTTP response, if we should intercept the request */
1304 struct http_response *rsp;
1306 /* Temporary copy of the client's headers before they get enlisted in csp->headers */
1307 struct list header_list;
1308 struct list *headers = &header_list;
1313 * Read the client's request. Note that since we're not using select() we
1314 * could get blocked here if a client connected, then didn't say anything!
1319 len = read_socket(csp->cfd, buf, sizeof(buf));
1321 if (len <= 0) break; /* error! */
1324 * If there is no memory left for buffering the
1325 * request, there is nothing we can do but hang up
1327 if (add_to_iob(csp, buf, len))
1332 req = get_header(csp);
1336 break; /* no HTTP request! */
1341 continue; /* more to come! */
1344 /* Does the request line look invalid? */
1345 if (client_protocol_is_unsupported(csp, req))
1348 * Yes. The request has already been
1349 * answered with a error response, the buffers
1350 * were freed and we're done with chatting.
1355 #ifdef FEATURE_FORCE_LOAD
1356 /* If this request contains the FORCE_PREFIX,
1357 * better get rid of it now and set the force flag --oes
1360 if (strstr(req, FORCE_PREFIX))
1362 strclean(req, FORCE_PREFIX);
1363 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
1364 csp->flags |= CSP_FLAG_FORCED;
1367 #endif /* def FEATURE_FORCE_LOAD */
1369 switch( parse_http_request(req, http, csp) )
1372 log_error(LOG_LEVEL_ERROR, "Out of memory while parsing request.");
1375 log_error(LOG_LEVEL_ERROR, "Couldn't parse request: %s.", req);
1383 if (http->cmd == NULL)
1385 strcpy(buf, CHEADER);
1386 write_socket(csp->cfd, buf, strlen(buf));
1388 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
1390 free_http_request(http);
1394 /* grab the rest of the client's headers */
1398 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1400 len = read_socket(csp->cfd, buf, sizeof(buf));
1403 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1408 * If there is no memory left for buffering the
1409 * request, there is nothing we can do but hang up
1411 if (add_to_iob(csp, buf, len))
1418 if (p == NULL) break;
1425 if (http->host == NULL)
1428 * If we still don't know the request destination,
1429 * the request is invalid or the client uses
1430 * Privoxy without it's knowledge.
1432 if (JB_ERR_OK != get_request_destination_elsewhere(csp, headers))
1435 * Our attempts to get the request destination
1436 * elsewhere failed or Privoxy is configured
1437 * to only accept proxy requests.
1439 * An error response has already been send
1440 * and we're done here.
1446 /* decide how to route the HTTP request */
1448 if ((fwd = forward_url(http, csp)) == NULL)
1450 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
1451 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1454 /* build the http request to send to the server
1455 * we have to do one of the following:
1457 * create = use the original HTTP request to create a new
1458 * HTTP request that has either the path component
1459 * without the http://domainspec (w/path) or the
1460 * full orininal URL (w/url)
1461 * Note that the path and/or the HTTP version may
1462 * have been altered by now.
1464 * connect = Open a socket to the host:port of the server
1465 * and short-circuit server and client socket.
1467 * pass = Pass the request unchanged if forwarding a CONNECT
1468 * request to a parent proxy. Note that we'll be sending
1469 * the CFAIL message ourselves if connecting to the parent
1470 * fails, but we won't send a CSUCCEED message if it works,
1471 * since that would result in a double message (ours and the
1472 * parent's). After sending the request to the parent, we simply
1475 * here's the matrix:
1478 * +--------+--------+
1480 * 0 | create | connect|
1482 * Forwarding +--------+--------+
1484 * 1 | create | pass |
1486 * +--------+--------+
1491 * Determine the actions for this URL
1493 #ifdef FEATURE_TOGGLE
1494 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1496 /* Most compatible set of actions (i.e. none) */
1497 init_current_action(csp->action);
1500 #endif /* ndef FEATURE_TOGGLE */
1502 url_actions(http, csp);
1507 * Check if a CONNECT request is allowable:
1508 * In the absence of a +limit-connect action, allow only port 443.
1509 * If there is an action, allow whatever matches the specificaton.
1513 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
1514 || (csp->action->flags & ACTION_LIMIT_CONNECT
1515 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
1517 if (csp->action->flags & ACTION_TREAT_FORBIDDEN_CONNECTS_LIKE_BLOCKS)
1519 /* The response will violate the specs, but makes unblocking easier. */
1520 log_error(LOG_LEVEL_ERROR, "Marking suspicious CONNECT request from %s for blocking.",
1522 csp->action->flags |= ACTION_BLOCK;
1527 strcpy(buf, CFORBIDDEN);
1528 write_socket(csp->cfd, buf, strlen(buf));
1529 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
1530 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
1538 * Downgrade http version from 1.1 to 1.0 if +downgrade
1541 if ( (http->ssl == 0)
1542 && (!strcmpic(http->ver, "HTTP/1.1"))
1543 && (csp->action->flags & ACTION_DOWNGRADE))
1546 http->ver = strdup("HTTP/1.0");
1548 if (http->ver == NULL)
1550 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1555 * Save a copy of the original request for logging
1557 http->ocmd = strdup(http->cmd);
1559 if (http->ocmd == NULL)
1561 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
1565 * (Re)build the HTTP request for non-SSL requests.
1566 * If forwarding, use the whole URL, else, use only the path.
1572 http->cmd = strdup(http->gpc);
1573 string_append(&http->cmd, " ");
1575 if (fwd->forward_host)
1577 string_append(&http->cmd, http->url);
1581 string_append(&http->cmd, http->path);
1583 string_append(&http->cmd, " ");
1584 string_append(&http->cmd, http->ver);
1586 if (http->cmd == NULL)
1588 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1590 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", http->cmd);
1592 enlist(csp->headers, http->cmd);
1594 /* Append the previously read headers */
1595 list_append_list_unique(csp->headers, headers);
1596 destroy_list(headers);
1599 * If the user has not supplied any wafers, and the user has not
1600 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1602 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1603 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1605 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1609 #ifdef FEATURE_KILL_POPUPS
1610 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
1611 #endif /* def FEATURE_KILL_POPUPS */
1613 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
1614 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
1616 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
1618 jpeg_inspect = ((csp->action->flags & ACTION_JPEG_INSPECT) != 0);
1621 * We have a request. Now, check to see if we need to
1622 * intercept it, i.e. If ..
1626 /* We may not forward the request by rfc2616 sect 14.31 */
1627 (NULL != (rsp = direct_response(csp)))
1629 /* or we are enabled and... */
1630 || (IS_ENABLED_AND (
1632 /* ..the request was blocked */
1633 ( NULL != (rsp = block_url(csp)))
1635 /* ..or untrusted */
1636 #ifdef FEATURE_TRUST
1637 || ( NULL != (rsp = trust_url(csp)))
1638 #endif /* def FEATURE_TRUST */
1640 /* ..or a redirect kicked in */
1641 || ( NULL != (rsp = redirect_url(csp)))
1645 * .. or a CGI call was detected and answered.
1647 * This check comes last to give the user the power
1648 * to deny acces to some (or all) of the cgi pages.
1650 || (NULL != (rsp = dispatch_cgi(csp)))
1654 /* Write the answer to the client */
1655 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1656 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1658 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1661 #ifdef FEATURE_STATISTICS
1662 /* Count as a rejected request */
1663 csp->flags |= CSP_FLAG_REJECTED;
1664 #endif /* def FEATURE_STATISTICS */
1666 /* Log (FIXME: All intercept reasons appear as "crunch" with Status 200) */
1667 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
1668 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
1670 /* Clean up and return */
1671 free_http_response(rsp);
1675 hdr = sed(client_patterns, add_client_headers, csp);
1678 /* FIXME Should handle error properly */
1679 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1682 list_remove_all(csp->headers);
1684 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1686 if (fwd->forward_host)
1688 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1689 fwd->forward_host, fwd->forward_port, http->hostport);
1693 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1696 /* here we connect to the server, gateway, or the forwarder */
1698 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
1699 && (errno == EINVAL) && (forwarded_connect_retries++ < max_forwarded_connect_retries))
1701 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
1702 forwarded_connect_retries, http->hostport);
1705 if (csp->sfd == JB_INVALID_SOCKET)
1707 if (fwd->type != SOCKS_NONE)
1710 rsp = error_response(csp, "forwarding-failed", errno);
1712 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1713 csp->ip_addr_str, http->ocmd);
1715 else if (errno == EINVAL)
1717 rsp = error_response(csp, "no-such-domain", errno);
1719 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
1720 csp->ip_addr_str, http->ocmd);
1724 rsp = error_response(csp, "connect-failed", errno);
1726 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1729 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1730 csp->ip_addr_str, http->ocmd);
1734 /* Write the answer to the client */
1737 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1738 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1740 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1744 free_http_response(rsp);
1749 if (fwd->forward_host || (http->ssl == 0))
1751 /* write the client's (modified) header to the server
1752 * (along with anything else that may be in the buffer)
1755 if (write_socket(csp->sfd, hdr, strlen(hdr))
1756 || (flush_socket(csp->sfd, csp) < 0))
1758 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1761 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1762 csp->ip_addr_str, http->ocmd);
1764 rsp = error_response(csp, "connect-failed", errno);
1768 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1769 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1771 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1775 free_http_response(rsp);
1783 * We're running an SSL tunnel and we're not forwarding,
1784 * so just send the "connect succeeded" message to the
1785 * client, flush the rest, and get out of the way.
1787 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1788 csp->ip_addr_str, http->ocmd);
1790 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
1798 log_error(LOG_LEVEL_CONNECT, "to %s successful", http->hostport);
1800 /* we're finished with the client's header */
1803 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1805 /* pass data between the client and server
1806 * until one or the other shuts down the connection.
1815 * FD_ZERO here seems to point to an errant macro which crashes.
1816 * So do this by hand for now...
1818 memset(&rfds,0x00,sizeof(fd_set));
1822 FD_SET(csp->cfd, &rfds);
1823 FD_SET(csp->sfd, &rfds);
1825 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
1829 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1833 /* this is the body of the browser's request
1834 * just read it and write it.
1837 if (FD_ISSET(csp->cfd, &rfds))
1839 len = read_socket(csp->cfd, buf, sizeof(buf));
1843 break; /* "game over, man" */
1846 if (write_socket(csp->sfd, buf, (size_t)len))
1848 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1855 * The server wants to talk. It could be the header or the body.
1856 * If `hdr' is null, then it's the header otherwise it's the body.
1857 * FIXME: Does `hdr' really mean `host'? No.
1861 if (FD_ISSET(csp->sfd, &rfds))
1864 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1868 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1870 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1871 csp->ip_addr_str, http->ocmd);
1873 rsp = error_response(csp, "connect-failed", errno);
1877 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1878 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1880 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1884 free_http_response(rsp);
1888 /* Add a trailing zero. This lets filter_popups
1889 * use string operations.
1893 #ifdef FEATURE_KILL_POPUPS
1894 /* Filter the popups on this read. */
1895 if (block_popups_now)
1897 filter_popups(buf, csp);
1899 #endif /* def FEATURE_KILL_POPUPS */
1901 /* Normally, this would indicate that we've read
1902 * as much as the server has sent us and we can
1903 * close the client connection. However, Microsoft
1904 * in its wisdom has released IIS/5 with a bug that
1905 * prevents it from sending the trailing \r\n in
1906 * a 302 redirect header (and possibly other headers).
1907 * To work around this if we've haven't parsed
1908 * a full header we'll append a trailing \r\n
1909 * and see if this now generates a valid one.
1911 * This hack shouldn't have any impacts. If we've
1912 * already transmitted the header or if this is a
1913 * SSL connection, then we won't bother with this
1914 * hack. So we only work on partially received
1915 * headers. If we append a \r\n and this still
1916 * doesn't generate a valid header, then we won't
1917 * transmit anything to the client.
1922 if (server_body || http->ssl)
1925 * If we have been buffering up the document,
1926 * now is the time to apply content modification
1927 * and send the result to the client.
1932 * If the content filter fails, use the original
1933 * buffer and length.
1934 * (see p != NULL ? p : csp->iob->cur below)
1936 if (NULL == (p = (*content_filter)(csp)))
1938 csp->content_length = (size_t)(csp->iob->eod - csp->iob->cur);
1941 hdr = sed(server_patterns_light, NULL, csp);
1945 /* FIXME Should handle error properly */
1946 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1949 if (write_socket(csp->cfd, hdr, strlen(hdr))
1950 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
1952 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1962 break; /* "game over, man" */
1966 * This is NOT the body, so
1967 * Let's pretend the server just sent us a blank line.
1969 snprintf(buf, sizeof(buf), "\r\n");
1970 len = (int)strlen(buf);
1973 * Now, let the normal header parsing algorithm below do its
1974 * job. If it fails, we'll exit instead of continuing.
1981 * If this is an SSL connection or we're in the body
1982 * of the server document, just write it to the client,
1983 * unless we need to buffer the body for later content-filtering
1986 if (server_body || http->ssl)
1991 * If there is no memory left for buffering the content, or the buffer limit
1992 * has been reached, switch to non-filtering mode, i.e. make & write the
1993 * header, flush the iob and buf, and get out of the way.
1995 if (add_to_iob(csp, buf, len))
2000 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
2002 hdr = sed(server_patterns, add_server_headers, csp);
2006 * Memory is too tight to even generate the header.
2007 * Send our static "Out-of-memory" page.
2009 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
2010 rsp = cgi_error_memory();
2012 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
2013 || write_socket(csp->cfd, rsp->body, rsp->content_length))
2015 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2020 hdrlen = strlen(hdr);
2022 if (write_socket(csp->cfd, hdr, hdrlen)
2023 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
2024 || (write_socket(csp->cfd, buf, (size_t)len)))
2026 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
2032 byte_count += hdrlen + (size_t)(flushed + len);
2034 content_filter = NULL;
2041 if (write_socket(csp->cfd, buf, (size_t)len))
2043 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
2047 byte_count += (size_t)len;
2052 /* we're still looking for the end of the
2053 * server's header ... (does that make header
2054 * parsing an "out of body experience" ?
2058 * buffer up the data we just read. If that fails,
2059 * there's little we can do but send our static
2060 * out-of-memory page.
2062 if (add_to_iob(csp, buf, len))
2064 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
2065 rsp = cgi_error_memory();
2067 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
2068 || write_socket(csp->cfd, rsp->body, rsp->content_length))
2070 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
2075 /* Convert iob into something sed() can digest */
2076 if (JB_ERR_PARSE == get_server_headers(csp))
2080 /* Well, we tried our MS IIS/5
2081 * hack and it didn't work.
2082 * The header is incomplete
2083 * and there isn't anything
2084 * we can do about it.
2090 /* Since we have to wait for
2091 * more from the server before
2092 * we can parse the headers
2093 * we just continue here.
2099 /* Did we actually get anything? */
2100 if (NULL == csp->headers->first)
2102 log_error(LOG_LEVEL_ERROR, "Empty server or forwarder response.");
2103 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 502 0", csp->ip_addr_str, http->cmd);
2104 strcpy(buf, NO_SERVER_DATA_RESPONSE);
2105 write_socket(csp->cfd, buf, strlen(buf));
2106 free_http_request(http);
2110 /* we have now received the entire header.
2111 * filter it and send the result to the client
2114 hdr = sed(server_patterns, add_server_headers, csp);
2117 /* FIXME Should handle error properly */
2118 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
2121 #ifdef FEATURE_KILL_POPUPS
2122 /* Start blocking popups if appropriate. */
2124 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
2125 !http->ssl && /* We talk plaintext */
2126 block_popups) /* Policy allows */
2128 block_popups_now = 1;
2130 * Filter the part of the body that came in the same read
2131 * as the last headers:
2133 filter_popups(csp->iob->cur, csp);
2136 #endif /* def FEATURE_KILL_POPUPS */
2138 /* Buffer and pcrs filter this if appropriate. */
2140 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
2141 !http->ssl && /* We talk plaintext */
2142 pcrs_filter) /* Policy allows */
2144 content_filter = pcrs_filter_response;
2147 /* Buffer and gif_deanimate this if appropriate. */
2149 if ((csp->content_type & CT_GIF) && /* It's an image/gif MIME-Type */
2150 !http->ssl && /* We talk plaintext */
2151 gif_deanimate) /* Policy allows */
2153 content_filter = gif_deanimate_response;
2156 /* Buffer and jpg_inspect this if appropriate. */
2158 if ((csp->content_type & CT_JPEG) && /* It's an image/jpeg MIME-Type */
2159 !http->ssl && /* We talk plaintext */
2160 jpeg_inspect) /* Policy allows */
2162 content_filter = jpeg_inspect_response;
2166 * Only write if we're not buffering for content modification
2168 if (!content_filter)
2170 /* write the server's (modified) header to
2171 * the client (along with anything else that
2172 * may be in the buffer)
2175 if (write_socket(csp->cfd, hdr, strlen(hdr))
2176 || ((len = flush_socket(csp->cfd, csp)) < 0))
2178 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
2180 /* the write failed, so don't bother
2181 * mentioning it to the client...
2182 * it probably can't hear us anyway.
2188 byte_count += (size_t)len;
2191 /* we're finished with the server's header */
2196 /* If this was a MS IIS/5 hack then it means
2197 * the server has already closed the
2198 * connection. Nothing more to read. Time
2209 return; /* huh? we should never get here */
2212 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
2213 csp->ip_addr_str, http->ocmd, byte_count);
2217 /*********************************************************************
2221 * Description : This is little more than chat. We only "serve" to
2222 * to close any socket that chat may have opened.
2225 * 1 : csp = Current client state (buffers, headers, etc...)
2229 *********************************************************************/
2231 void serve(struct client_state *csp)
2232 #else /* ifndef AMIGA */
2233 static void serve(struct client_state *csp)
2234 #endif /* def AMIGA */
2237 close_socket(csp->cfd);
2239 if (csp->sfd != JB_INVALID_SOCKET)
2241 close_socket(csp->sfd);
2244 csp->flags &= ~CSP_FLAG_ACTIVE;
2250 /*********************************************************************
2252 * Function : server_thread
2254 * Description : We only exist to call `serve' in a threaded environment.
2257 * 1 : data = Current client state (buffers, headers, etc...)
2259 * Returns : Always 0.
2261 *********************************************************************/
2262 static int32 server_thread(void *data)
2264 serve((struct client_state *) data);
2271 /*********************************************************************
2275 * Description : Print usage info & exit.
2277 * Parameters : Pointer to argv[0] for identifying ourselves
2281 *********************************************************************/
2282 void usage(const char *myname)
2284 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
2286 "Usage: %s [--help] [--version] [configfile]\n"
2288 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
2290 "Aborting.\n", myname);
2297 /*********************************************************************
2299 * Function : initialize_mutexes
2301 * Description : Prepares mutexes if mutex support is available.
2305 * Returns : Void, exits in case of errors.
2307 *********************************************************************/
2308 void initialize_mutexes()
2312 #ifdef FEATURE_PTHREAD
2314 * Prepare global mutex semaphores
2316 err = pthread_mutex_init(&log_mutex, 0);
2318 if (!err) err = pthread_mutex_init(&log_init_mutex, 0);
2321 * XXX: The assumptions below are a bit naive
2322 * and can cause locks that aren't necessary.
2324 * For example older FreeBSD versions (< 6.x?)
2325 * have no gethostbyname_r, but gethostbyname is
2328 #ifndef HAVE_GMTIME_R
2329 if (!err) err = pthread_mutex_init(&gmtime_mutex, 0);
2330 #endif /* ndef HAVE_GMTIME_R */
2332 #ifndef HAVE_LOCALTIME_R
2333 if (!err) err = pthread_mutex_init(&localtime_mutex, 0);
2334 #endif /* ndef HAVE_GMTIME_R */
2336 #ifndef HAVE_GETHOSTBYADDR_R
2337 if (!err) err = pthread_mutex_init(&gethostbyaddr_mutex, 0);
2338 #endif /* ndef HAVE_GETHOSTBYADDR_R */
2340 #ifndef HAVE_GETHOSTBYNAME_R
2341 if (!err) err = pthread_mutex_init(&gethostbyname_mutex, 0);
2342 #endif /* ndef HAVE_GETHOSTBYNAME_R */
2345 if (!err) err = pthread_mutex_init(&rand_mutex, 0);
2346 #endif /* ndef HAVE_RANDOM */
2347 #endif /* FEATURE_PTHREAD */
2350 * TODO: mutex support for mingw32 would be swell.
2355 printf("Fatal error. Mutex initialization failed: %s.\n",
2364 /*********************************************************************
2368 * Description : Load the config file and start the listen loop.
2369 * This function is a lot more *sane* with the `load_config'
2370 * and `listen_loop' functions; although it stills does
2371 * a *little* too much for my taste.
2374 * 1 : argc = Number of parameters (including $0).
2375 * 2 : argv = Array of (char *)'s to the parameters.
2377 * Returns : 1 if : can't open config file, unrecognized directive,
2378 * stats requested in multi-thread mode, can't open the
2379 * log file, can't open the jar file, listen port is invalid,
2380 * any load fails, and can't bind port.
2382 * Else main never returns, the process must be signaled
2383 * to terminate execution. Or, on Windows, use the
2384 * "File", "Exit" menu option.
2386 *********************************************************************/
2388 int real_main(int argc, const char *argv[])
2390 int main(int argc, const char *argv[])
2394 unsigned int random_seed;
2396 struct passwd *pw = NULL;
2397 struct group *grp = NULL;
2406 #if !defined(_WIN32)
2414 * Parse the command line arguments
2416 while (++argc_pos < argc)
2419 /* Check to see if the service must be installed or uninstalled */
2420 if (strncmp(argv[argc_pos], "--install", 9) == 0)
2422 const char *pName = argv[argc_pos] + 9;
2425 exit( (install_service(pName)) ? 0 : 1 );
2427 else if (strncmp(argv[argc_pos], "--uninstall", + 11) == 0)
2429 const char *pName = argv[argc_pos] + 11;
2432 exit((uninstall_service(pName)) ? 0 : 1);
2434 else if (strcmp(argv[argc_pos], "--service" ) == 0)
2436 bRunAsService = TRUE;
2437 w32_set_service_cwd();
2438 atexit(w32_service_exit_notify);
2441 #endif /* defined(_WIN32) */
2444 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
2446 if (strcmp(argv[argc_pos], "--help") == 0)
2451 else if(strcmp(argv[argc_pos], "--version") == 0)
2453 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
2459 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
2464 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
2466 if (++argc_pos == argc) usage(argv[0]);
2467 pidfile = strdup(argv[argc_pos]);
2470 else if (strcmp(argv[argc_pos], "--user" ) == 0)
2472 if (++argc_pos == argc) usage(argv[argc_pos]);
2474 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
2477 if (NULL == (grp = getgrnam(p)))
2479 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
2483 if (NULL == (pw = getpwnam(argv[argc_pos])))
2485 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
2488 if (p != NULL) *--p = '\0';
2491 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
2496 #endif /* defined(unix) */
2497 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
2499 configfile = argv[argc_pos];
2502 } /* -END- while (more arguments) */
2505 if ( *configfile != '/' )
2507 char *abs_file, cwd[1024];
2509 /* make config-filename absolute here */
2510 if ( !(getcwd(cwd, sizeof(cwd))))
2512 perror("get working dir failed");
2516 if (!(basedir = strdup(cwd))
2517 || (!(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))))
2519 perror("malloc failed");
2522 strcpy( abs_file, basedir );
2523 strcat( abs_file, "/" );
2524 strcat( abs_file, configfile );
2525 configfile = abs_file;
2527 #endif /* defined unix */
2531 clients->next = NULL;
2535 #elif defined(_WIN32)
2539 /* Prepare mutexes if supported and necessary. */
2540 initialize_mutexes();
2542 random_seed = (unsigned int)time(NULL);
2544 srandom(random_seed);
2547 #endif /* ifdef HAVE_RANDOM */
2550 * Unix signal handling
2552 * Catch the abort, interrupt and terminate signals for a graceful exit
2553 * Catch the hangup signal so the errlog can be reopened.
2554 * Ignore the broken pipe signals (FIXME: Why?)
2556 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
2559 const int catched_signals[] = { SIGTERM, SIGINT, SIGHUP, 0 };
2560 const int ignored_signals[] = { SIGPIPE, 0 };
2562 for (idx = 0; catched_signals[idx] != 0; idx++)
2564 #ifdef sun /* FIXME: Is it safe to check for HAVE_SIGSET instead? */
2565 if (sigset(catched_signals[idx], sig_handler) == SIG_ERR)
2567 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
2568 #endif /* ifdef sun */
2570 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
2574 for (idx = 0; ignored_signals[idx] != 0; idx++)
2576 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
2578 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
2583 #else /* ifdef _WIN32 */
2584 # ifdef _WIN_CONSOLE
2586 * We *are* in a windows console app.
2587 * Print a verbose messages about FAQ's and such
2589 printf("%s", win32_blurb);
2590 # endif /* def _WIN_CONSOLE */
2591 #endif /* def _WIN32 */
2594 /* Initialize the CGI subsystem */
2595 cgi_init_error_messages();
2598 * If runnig on unix and without the --nodaemon
2599 * option, become a daemon. I.e. fork, detach
2600 * from tty and get process group leadership
2613 if ( pid < 0 ) /* error */
2618 else if ( pid != 0 ) /* parent */
2623 * must check for errors
2624 * child died due to missing files aso
2627 wpid = waitpid( pid, &status, WNOHANG );
2636 /* Should be more portable, but not as well tested */
2641 #else /* ndef __FreeBSD__ */
2643 #endif /* ndef __FreeBSD__ */
2644 fd = open("/dev/tty", O_RDONLY);
2647 /* no error check here */
2648 ioctl( fd, TIOCNOTTY,0 );
2652 /* FIXME: should close stderr (fd 2) here too, but the test
2654 * and load config file is done in listen_loop() and puts
2655 * some messages on stderr there.
2662 } /* -END- if (!no_daemon) */
2665 * As soon as we have written the PID file, we can switch
2666 * to the user and group ID indicated by the --user option
2672 if (setgid((NULL != grp) ? grp->gr_gid : pw->pw_gid))
2674 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
2680 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
2682 if (chroot(pw->pw_dir) < 0)
2684 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
2688 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
2691 if (setuid(pw->pw_uid))
2693 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
2697 char putenv_dummy[64];
2699 strcpy(putenv_dummy, "HOME=/");
2700 if (putenv(putenv_dummy) != 0)
2702 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
2705 snprintf(putenv_dummy, 64, "USER=%s", pw->pw_name);
2706 if (putenv(putenv_dummy) != 0)
2708 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
2714 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
2717 #endif /* defined unix */
2720 /* This will be FALSE unless the command line specified --service
2724 /* Yup, so now we must attempt to establish a connection
2725 * with the service dispatcher. This will only work if this
2726 * process was launched by the service control manager to
2727 * actually run as a service. If this isn't the case, i've
2728 * known it take around 30 seconds or so for the call to return.
2731 /* The StartServiceCtrlDispatcher won't return until the service is stopping */
2732 if (w32_start_service_ctrl_dispatcher(w32ServiceDispatchTable))
2734 /* Service has run, and at this point is now being stopped, so just return */
2739 printf("Warning: Failed to connect to Service Control Dispatcher\nwhen starting as a service!\n");
2741 /* An error occurred. Usually it's because --service was wrongly specified
2742 * and we were unable to connect to the Service Control Dispatcher because
2743 * it wasn't expecting us and is therefore not listening.
2745 * For now, just continue below to call the listen_loop function.
2748 #endif /* def _WIN32 */
2758 /*********************************************************************
2760 * Function : bind_port_helper
2762 * Description : Bind the listen port. Handles logging, and aborts
2766 * 1 : config = Privoxy configuration. Specifies port
2769 * Returns : Port that was opened.
2771 *********************************************************************/
2772 static jb_socket bind_port_helper(struct configuration_spec * config)
2777 if ( (config->haddr != NULL)
2778 && (config->haddr[0] == '1')
2779 && (config->haddr[1] == '2')
2780 && (config->haddr[2] == '7')
2781 && (config->haddr[3] == '.') )
2783 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
2786 else if (config->haddr == NULL)
2788 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
2793 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
2794 config->hport, config->haddr);
2797 result = bind_port(config->haddr, config->hport, &bfd);
2804 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2805 "There may be another Privoxy or some other "
2806 "proxy running on port %d",
2807 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
2808 config->hport, config->hport);
2811 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2812 "The hostname is not resolvable",
2813 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2816 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
2817 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2820 /* shouldn't get here */
2821 return JB_INVALID_SOCKET;
2824 config->need_bind = 0;
2831 /* Without this simple workaround we get this compiler warning from _beginthread
2832 * warning C4028: formal parameter 1 different from declaration
2834 void w32_service_listen_loop(void *p)
2838 #endif /* def _WIN32 */
2841 /*********************************************************************
2843 * Function : listen_loop
2845 * Description : bind the listen port and enter a "FOREVER" listening loop.
2851 *********************************************************************/
2852 static void listen_loop(void)
2854 struct client_state *csp = NULL;
2856 struct configuration_spec * config;
2858 config = load_config();
2860 bfd = bind_port_helper(config);
2862 #ifdef FEATURE_GRACEFUL_TERMINATION
2863 while (!g_terminate)
2868 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
2869 while (waitpid(-1, NULL, WNOHANG) > 0)
2871 /* zombie children */
2873 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
2876 * Free data that was used by died threads
2882 * Re-open the errlog after HUP signal
2884 if (received_hup_signal)
2886 init_error_log(Argv[0], config->logfile, config->debug);
2887 received_hup_signal = 0;
2892 #ifdef FEATURE_COOKIE_JAR
2894 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
2895 * already open. I think unload_configfile() is not being run, which should do
2896 * this work. Until that can get resolved, we'll use this workaround.
2900 if (csp->config->jar)
2902 fclose(csp->config->jar);
2903 csp->config->jar = NULL;
2905 #endif /* FEATURE_COOKIE_JAR */
2906 #endif /* __OS2__ */
2908 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
2910 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
2914 csp->flags |= CSP_FLAG_ACTIVE;
2915 csp->sfd = JB_INVALID_SOCKET;
2917 csp->config = config = load_config();
2919 if ( config->need_bind )
2922 * Since we were listening to the "old port", we will not see
2923 * a "listen" param change until the next IJB request. So, at
2924 * least 1 more request must be made for us to find the new
2925 * setting. I am simply closing the old socket and binding the
2928 * Which-ever is correct, we will serve 1 more page via the
2929 * old settings. This should probably be a "show-proxy-args"
2930 * request. This should not be a so common of an operation
2931 * that this will hurt people's feelings.
2936 bfd = bind_port_helper(config);
2939 log_error(LOG_LEVEL_CONNECT, "Listening for new connections ... ");
2941 if (!accept_connection(csp, bfd))
2943 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
2956 log_error(LOG_LEVEL_CONNECT, "accepted connection from %s", csp->ip_addr_str);
2959 #ifdef FEATURE_TOGGLE
2960 if (global_toggle_state)
2962 csp->flags |= CSP_FLAG_TOGGLED_ON;
2964 #endif /* def FEATURE_TOGGLE */
2966 if (run_loader(csp))
2968 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
2969 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2973 if (block_acl(NULL,csp))
2975 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
2976 close_socket(csp->cfd);
2980 #endif /* def FEATURE_ACL */
2982 /* add it to the list of clients */
2983 csp->next = clients->next;
2984 clients->next = csp;
2986 if (config->multi_threaded)
2990 /* this is a switch () statment in the C preprocessor - ugh */
2991 #undef SELECTED_ONE_OPTION
2993 /* Use Pthreads in preference to native code */
2994 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
2995 #define SELECTED_ONE_OPTION
2997 pthread_t the_thread;
2998 pthread_attr_t attrs;
3000 pthread_attr_init(&attrs);
3001 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
3002 errno = pthread_create(&the_thread, &attrs,
3003 (void * (*)(void *))serve, csp);
3004 child_id = errno ? -1 : 0;
3005 pthread_attr_destroy(&attrs);
3009 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
3010 #define SELECTED_ONE_OPTION
3011 child_id = _beginthread(
3012 (void (*)(void *))serve,
3017 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
3018 #define SELECTED_ONE_OPTION
3019 child_id = _beginthread(
3020 (void(* _Optlink)(void*))serve,
3026 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
3027 #define SELECTED_ONE_OPTION
3029 thread_id tid = spawn_thread
3030 (server_thread, "server", B_NORMAL_PRIORITY, csp);
3032 if ((tid >= 0) && (resume_thread(tid) == B_OK))
3034 child_id = (int) tid;
3043 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
3044 #define SELECTED_ONE_OPTION
3045 csp->cfd = ReleaseSocket(csp->cfd, -1);
3048 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3049 NP_Output, Output(),
3050 NP_CloseOutput, FALSE,
3051 NP_Name, (ULONG)"privoxy child",
3055 child_id = (int)CreateNewProcTags(NP_Entry, (ULONG)server_thread,
3056 NP_Output, Output(),
3057 NP_CloseOutput, FALSE,
3058 NP_Name, (ULONG)"privoxy child",
3059 NP_StackSize, 200*1024,
3065 ((struct Task *)child_id)->tc_UserData = csp;
3066 Signal((struct Task *)child_id, SIGF_SINGLE);
3071 #if !defined(SELECTED_ONE_OPTION)
3074 /* This block is only needed when using fork().
3075 * When using threads, the server thread was
3076 * created and run by the call to _beginthread().
3078 if (child_id == 0) /* child */
3081 #ifdef FEATURE_TOGGLE
3082 int inherited_toggle_state = global_toggle_state;
3083 #endif /* def FEATURE_TOGGLE */
3088 * If we've been toggled or we've blocked the request, tell Mom
3091 #ifdef FEATURE_TOGGLE
3092 if (inherited_toggle_state != global_toggle_state)
3094 rc |= RC_FLAG_TOGGLED;
3096 #endif /* def FEATURE_TOGGLE */
3098 #ifdef FEATURE_STATISTICS
3099 if (csp->flags & CSP_FLAG_REJECTED)
3101 rc |= RC_FLAG_BLOCKED;
3103 #endif /* ndef FEATURE_STATISTICS */
3107 else if (child_id > 0) /* parent */
3109 /* in a fork()'d environment, the parent's
3110 * copy of the client socket and the CSP
3114 #if !defined(_WIN32) && !defined(__CYGWIN__)
3116 wait( &child_status );
3119 * Evaluate child's return code: If the child has
3120 * - been toggled, toggle ourselves
3121 * - blocked its request, bump up the stats counter
3124 #ifdef FEATURE_TOGGLE
3125 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
3127 global_toggle_state = !global_toggle_state;
3129 #endif /* def FEATURE_TOGGLE */
3131 #ifdef FEATURE_STATISTICS
3133 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
3137 #endif /* def FEATURE_STATISTICS */
3139 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
3140 close_socket(csp->cfd);
3141 csp->flags &= ~CSP_FLAG_ACTIVE;
3145 #undef SELECTED_ONE_OPTION
3146 /* end of cpp switch () */
3148 if (child_id < 0) /* failed */
3150 char buf[BUFFER_SIZE];
3152 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
3154 snprintf(buf , sizeof(buf), "Privoxy: can't fork: errno = %d", errno);
3156 write_socket(csp->cfd, buf, strlen(buf));
3157 close_socket(csp->cfd);
3158 csp->flags &= ~CSP_FLAG_ACTIVE;
3169 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
3171 /* Clean up. Aim: free all memory (no leaks) */
3172 #ifdef FEATURE_GRACEFUL_TERMINATION
3174 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
3176 unload_current_config_file();
3177 unload_current_actions_file();
3178 unload_current_re_filterfile();
3179 #ifdef FEATURE_TRUST
3180 unload_current_trust_file();
3183 if (config->multi_threaded)
3190 } while ((clients->next != NULL) && (--i > 0));
3194 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
3205 #ifdef FEATURE_COOKIE_JAR
3206 if (NULL != config->jar)
3208 fclose(config->jar);
3212 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
3213 /* Cleanup - remove taskbar icon etc. */
3218 #endif /* FEATURE_GRACEFUL_TERMINATION */