1 const char jcc_rcs[] = "$Id: jcc.c,v 1.95 2006/08/03 02:46:41 david__schmidt 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 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 1.95 2006/08/03 02:46:41 david__schmidt
37 * Incorporate Fabian Keil's patch work:
\rhttp://www.fabiankeil.de/sourcecode/privoxy/
39 * Revision 1.94 2006/07/18 14:48:46 david__schmidt
40 * Reorganizing the repository: swapping out what was HEAD (the old 3.1 branch)
41 * with what was really the latest development (the v_3_0_branch branch)
43 * Revision 1.92.2.16 2005/04/03 20:10:50 david__schmidt
44 * Thanks to Jindrich Makovicka for a race condition fix for the log
45 * file. The race condition remains for non-pthread implementations.
46 * Reference patch #1175720.
48 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
49 * Add the ability to check jpeg images for invalid
50 * lengths of comment blocks. Defensive strategy
51 * against the exploit:
52 * Microsoft Security Bulletin MS04-028
53 * Buffer Overrun in JPEG Processing (GDI+) Could
54 * Allow Code Execution (833987)
55 * Enabled with +inspect-jpegs in actions files.
57 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
58 * - Fixed usage info for non-unix platforms
59 * - Fixed small cmdline parsing bug
61 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
62 * Diagnostics: Now preserve the returncode of pthread_create
63 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
65 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
66 * No longer ignore SIGCHLD. Fixes bug #769381
68 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
69 * Close jarfile on graceful exit, remove stray line
71 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
72 * Cosmetics: Killed a warning, a typo and an allocation left at exit
74 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
75 * No longer rely on non-POSIX.1 extensions of getcwd().
78 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
79 * Replaced setenv() by posix-compliant putenv()
80 * Thanks to Neil McCalden (nmcc AT users.sf.net).
82 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
83 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
85 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
86 * Clean-up and extension of improvements for forked mode:
87 * - Child's return code now consists of flags RC_FLAG_*
88 * - Reporting toggle to parent now properly #ifdef'ed
89 * - Children now report blocking to parent. This enables
90 * statistics in forked mode
92 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
93 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
94 * Children now report having been toggled through _exit(17), parents
95 * watch for that code and toggle themselves if found.
97 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
98 * Wrapping all *_r functions (the non-_r versions of them) with
99 * mutex semaphores for OSX. Hopefully this will take care of all
100 * of those pesky crash reports.
102 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
103 * Fixed two mostly harmless mem leaks
105 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
106 * Fix: Head of global clients list now initialized to NULL
108 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
109 * Added basic support for OPTIONS and TRACE HTTP methods:
110 * - New interceptor direct_response() added in chat().
111 * - sed() moved to earlier in the process, so that the
112 * Host: header is evaluated before actions and forwarding
115 * Revision 1.92 2002/05/08 16:00:46 oes
116 * Chat's buffer handling:
117 * - Fixed bug with unchecked out-of-mem conditions
118 * while reading client request & server headers
119 * - No longer predict if the buffer limit will be exceeded
120 * in the next read -- check add_to_iob's new
121 * return code. If buffer couldn't be extended
122 * (policy or out-of-mem) while
123 * - reading from client: abort
124 * - reading server headers: send error page
125 * - buffering server body for filter: flush,
126 * and if that fails: send error page
128 * Revision 1.91 2002/04/08 20:35:58 swa
131 * Revision 1.90 2002/04/02 14:57:28 oes
132 * Made sending wafers independent of FEATURE_COOKIE_JAR
134 * Revision 1.89 2002/03/31 17:18:59 jongfoster
135 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
137 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
138 * More compiler warning message maintenance
140 * Revision 1.87 2002/03/26 22:29:54 swa
141 * we have a new homepage!
143 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
144 * Workaround for closing the jarfile before load_config() comes around again
146 * Revision 1.85 2002/03/24 15:23:33 jongfoster
149 * Revision 1.84 2002/03/24 13:25:43 swa
150 * name change related issues
152 * Revision 1.83 2002/03/16 23:54:06 jongfoster
153 * Adding graceful termination feature, to help look for memory leaks.
154 * If you enable this (which, by design, has to be done by hand
155 * editing config.h) and then go to http://i.j.b/die, then the program
156 * will exit cleanly after the *next* request. It should free all the
157 * memory that was used.
159 * Revision 1.82 2002/03/13 00:27:05 jongfoster
162 * Revision 1.81 2002/03/12 01:42:50 oes
163 * Introduced modular filters
165 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
166 * OS/2 port maintenance:
167 * - Fixed EMX build - it had decayed a little
168 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
169 * substituted a memset for now.
171 * Revision 1.79 2002/03/09 20:03:52 jongfoster
172 * - Making various functions return int rather than size_t.
173 * (Undoing a recent change). Since size_t is unsigned on
174 * Windows, functions like read_socket that return -1 on
175 * error cannot return a size_t.
177 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
178 * crashes, and also frequently caused JB to jump to 100%
179 * CPU and stay there. (Because it thought it had just
180 * read ((unsigned)-1) == 4Gb of data...)
182 * - The signature of write_socket has changed, it now simply
183 * returns success=0/failure=nonzero.
185 * - Trying to get rid of a few warnings --with-debug on
186 * Windows, I've introduced a new type "jb_socket". This is
187 * used for the socket file descriptors. On Windows, this
188 * is SOCKET (a typedef for unsigned). Everywhere else, it's
189 * an int. The error value can't be -1 any more, so it's
190 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
191 * Windows it maps to the #define INVALID_SOCKET.)
193 * - The signature of bind_port has changed.
195 * Revision 1.78 2002/03/08 21:35:04 oes
196 * Added optional group supplement to --user option. Will now use default group of user if no group given
198 * Revision 1.77 2002/03/07 03:52:06 oes
199 * - Fixed compiler warnings etc
200 * - Improved handling of failed DNS lookups
202 * Revision 1.76 2002/03/06 22:54:35 jongfoster
203 * Automated function-comment nitpicking.
205 * Revision 1.75 2002/03/06 10:02:19 oes
206 * Fixed stupid bug when --user was not given
208 * Revision 1.74 2002/03/06 00:49:31 jongfoster
209 * Fixing warning on Windows
210 * Making #ifdefs that refer to the same variable consistently
211 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
213 * Revision 1.73 2002/03/05 23:57:30 hal9
214 * Stray character 's' on line 1618 was breaking build.
216 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
217 * - Re-enable OS/2 building after new parms were added
218 * - Fix false out of memory report when resolving CGI templates when no IP
219 * address is available of failed attempt (a la no such domain)
221 * Revision 1.71 2002/03/05 18:13:56 oes
222 * Added --user option
224 * Revision 1.70 2002/03/05 04:52:42 oes
225 * Deleted non-errlog debugging code
227 * Revision 1.69 2002/03/04 23:50:00 jongfoster
228 * Splitting off bind_port() call into bind_port_helper(), with
231 * Revision 1.68 2002/03/04 20:17:32 oes
234 * Revision 1.67 2002/03/04 18:18:57 oes
235 * - Removed _DEBUG mode
236 * - Cleand up cmdline parsing
237 * - Introduced --no-daemon, --pidfile options
238 * - Cleaned up signal handling:
239 * - Terminate cleanly on INT, TERM and ABRT
240 * - Schedule logfile for re-opening on HUP
241 * - Ignore CHLD and PIPE
242 * - Leave the rest with their default handlers
243 * - Uniform handler registration
244 * - Added usage() function
245 * - Played styleguide police
247 * Revision 1.66 2002/03/03 15:06:55 oes
248 * Re-enabled automatic config reloading
250 * Revision 1.65 2002/03/03 14:49:11 oes
251 * Fixed CLF logging: Now uses client's original HTTP request
253 * Revision 1.64 2002/03/03 09:18:03 joergs
254 * Made jumbjuster work on AmigaOS again.
256 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
257 * Clean up a little CRLF unpleasantness that suddenly appeared
259 * Revision 1.62 2002/02/20 23:17:23 jongfoster
260 * Detecting some out-of memory conditions and exiting with a log message.
262 * Revision 1.61 2002/01/17 21:01:52 jongfoster
263 * Moving all our URL and URL pattern parsing code to urlmatch.c.
265 * Revision 1.60 2001/12/30 14:07:32 steudten
266 * - Add signal handling (unix)
267 * - Add SIGHUP handler (unix)
268 * - Add creation of pidfile (unix)
269 * - Add action 'top' in rc file (RH)
270 * - Add entry 'SIGNALS' to manpage
271 * - Add exit message to logfile (unix)
273 * Revision 1.59 2001/12/13 14:07:18 oes
274 * Fixed Bug: 503 error page now sent OK
276 * Revision 1.58 2001/11/30 23:37:24 jongfoster
277 * Renaming the Win32 config file to config.txt - this is almost the
278 * same as the corresponding UNIX name "config"
280 * Revision 1.57 2001/11/16 00:47:43 jongfoster
281 * Changing the tty-disconnection code to use setsid().
283 * Revision 1.56 2001/11/13 20:20:54 jongfoster
284 * Tabs->spaces, fixing a bug with missing {} around an if()
286 * Revision 1.55 2001/11/13 20:14:53 jongfoster
287 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
289 * Revision 1.54 2001/11/07 00:03:14 steudten
290 * Give reliable return value if an error
291 * occurs not just 0 with new daemon mode.
293 * Revision 1.53 2001/11/05 21:41:43 steudten
294 * Add changes to be a real daemon just for unix os.
295 * (change cwd to /, detach from controlling tty, set
296 * process group and session leader to the own process.
298 * Add some fatal-error log message for failed malloc().
299 * Add '-d' if compiled with 'configure --with-debug' to
300 * enable debug output.
302 * Revision 1.52 2001/10/26 20:11:20 jongfoster
303 * Fixing type mismatch
305 * Revision 1.51 2001/10/26 17:38:28 oes
308 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
309 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
310 * threads to call select() simultaneously. So, it's time to do a real, live,
311 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
312 * (native). Both versions will work, but using __OS2__ offers multi-threading.
314 * Revision 1.49 2001/10/23 21:41:35 jongfoster
315 * Added call to initialize the (statically-allocated of course)
316 * "out of memory" CGI response.
318 * Revision 1.48 2001/10/10 19:56:46 jongfoster
319 * Moving some code that wasn't cookie-related out of an #ifdef
322 * Revision 1.47 2001/10/10 16:44:36 oes
323 * Added CONNECT destination port limitation check
325 * Revision 1.46 2001/10/08 15:17:41 oes
326 * Re-enabled SSL forwarding
328 * Revision 1.45 2001/10/07 15:42:11 oes
329 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
331 * Moved downgrading of the HTTP version from parse_http_request to
332 * chat(), since we can't decide if it is necessary before we have
333 * determined the actions for the URL. The HTTP command is now
334 * *always* re-built so the repairs need no longer be special-cased.
336 * filter_popups now gets a csp pointer so it can raise the new
337 * CSP_FLAG_MODIFIED flag.
341 * Added configurable size limit for the IOB. If the IOB grows so
342 * large that the next read would exceed the limit, the header
343 * is generated, and the header & unfiltered buffer are flushed
344 * to the client. Chat then continues in non-buffering,
345 * non-filtering body mode.
347 * Revision 1.44 2001/10/02 18:13:57 oes
350 * Revision 1.43 2001/10/02 15:32:13 oes
351 * Moved generation of hdr
353 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
354 * Cleaning up 2 compiler warnings on OS/2.
356 * Revision 1.41 2001/09/16 17:05:14 jongfoster
357 * Removing unused #include showarg.h
359 * Revision 1.40 2001/09/16 15:41:45 jongfoster
360 * Fixing signed/unsigned comparison warning.
362 * Revision 1.39 2001/09/16 13:21:27 jongfoster
363 * Changes to use new list functions.
365 * Revision 1.38 2001/09/16 13:01:46 jongfoster
366 * Removing redundant function call that zeroed zalloc()'d memory.
368 * Revision 1.37 2001/09/10 11:12:24 oes
369 * Deleted unused variable
371 * Revision 1.36 2001/09/10 10:56:15 oes
372 * Silenced compiler warnings
374 * Revision 1.35 2001/07/31 14:44:22 oes
375 * Deleted unused size parameter from filter_popups()
377 * Revision 1.34 2001/07/30 22:08:36 jongfoster
378 * Tidying up #defines:
379 * - All feature #defines are now of the form FEATURE_xxx
380 * - Permanently turned off WIN_GUI_EDIT
381 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
383 * Revision 1.33 2001/07/29 19:32:00 jongfoster
384 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
386 * Revision 1.32 2001/07/29 18:47:05 jongfoster
387 * Adding missing #include "loadcfg.h"
389 * Revision 1.31 2001/07/29 12:17:48 oes
390 * Applied pthread fix by Paul Lieverse
392 * Revision 1.30 2001/07/25 22:57:13 jongfoster
393 * __BEOS__ no longer overrides FEATURE_PTHREAD.
394 * This is because FEATURE_PTHREAD will soon be widely used, so I
395 * want to keep it simple.
397 * Revision 1.29 2001/07/24 12:47:06 oes
398 * Applied BeOS support update by Eugenia
400 * Revision 1.28 2001/07/23 13:26:12 oes
401 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
403 * Revision 1.27 2001/07/19 19:09:47 haroon
404 * - Added code to take care of the situation where while processing the first
405 * server response (which includes the server header), after finding the end
406 * of the headers we were not looking past the end of the headers for
407 * content modification. I enabled it for filter_popups.
408 * Someone else should look to see if other similar operations should be
409 * done to the discarded portion of the buffer.
411 * Note 2001/07/20: No, the other content modification mechanisms will process
412 * the whole iob later anyway. --oes
414 * Revision 1.26 2001/07/18 12:31:36 oes
417 * Revision 1.25 2001/07/15 19:43:49 jongfoster
418 * Supports POSIX threads.
419 * Also removed some unused #includes.
421 * Revision 1.24 2001/07/13 14:00:40 oes
422 * - Generic content modification scheme:
423 * Each feature has its own applicability flag that is set
424 * from csp->action->flags.
425 * Replaced the "filtering" int flag , by a function pointer
426 * "content_filter" to the function that will do the content
427 * modification. If it is != NULL, the document will be buffered
428 * and processed through *content_filter, which must set
429 * csp->content_length and return a modified copy of the body
430 * or return NULL (on failiure).
431 * - Changed csp->is_text to the more generic bitmap csp->content_type
432 * which can currently take the valued CT_TEXT or CT_GIF
434 * - Removed all #ifdef PCRS
436 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
437 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
438 * the `block_acl' call. This prevents a compilation error when the user
439 * does not wish to use the "ACL" feature.
441 * Revision 1.22 2001/06/29 21:45:41 oes
442 * Indentation, CRLF->LF, Tab-> Space
444 * Revision 1.21 2001/06/29 13:29:36 oes
445 * - Cleaned up, improved comments
446 * - Unified all possible interceptors (CGI,
447 * block, trust, fast_redirect) in one
448 * place, with one (CGI) answer generation
449 * mechansim. Much clearer now.
450 * - Removed the GIF image generation, which
451 * is now done in filters.c:block_url()
452 * - Made error conditions like domain lookup
453 * failiure or (various) problems while talking
454 * to the server use cgi.c:error_response()
455 * instead of generating HTML/HTTP in chat() (yuck!)
456 * - Removed logentry from cancelled commit
458 * Revision 1.20 2001/06/09 10:55:28 jongfoster
459 * Changing BUFSIZ ==> BUFFER_SIZE
461 * Revision 1.19 2001/06/07 23:12:52 jongfoster
462 * Replacing function pointer in struct gateway with a directly
463 * called function forwarded_connect().
464 * Replacing struct gateway with struct forward_spec
466 * Revision 1.18 2001/06/03 19:12:16 oes
467 * introduced new cgi handling
469 * Revision 1.17 2001/06/01 20:07:23 jongfoster
470 * Now uses action +image-blocker{} rather than config->tinygif
472 * Revision 1.16 2001/06/01 18:49:17 jongfoster
473 * Replaced "list_share" with "list" - the tiny memory gain was not
474 * worth the extra complexity.
476 * Revision 1.15 2001/05/31 21:24:47 jongfoster
477 * Changed "permission" to "action" throughout.
478 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
479 * Moved vanilla wafer check into chat(), since we must now
480 * decide whether or not to add it based on the URL.
482 * Revision 1.14 2001/05/29 20:14:01 joergs
483 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
486 * Revision 1.13 2001/05/29 09:50:24 jongfoster
487 * Unified blocklist/imagelist/permissionslist.
488 * File format is still under discussion, but the internal changes
491 * Also modified interceptor behaviour:
492 * - We now intercept all URLs beginning with one of the following
493 * prefixes (and *only* these prefixes):
495 * * http://ijbswa.sf.net/config/
496 * * http://ijbswa.sourceforge.net/config/
497 * - New interceptors "home page" - go to http://i.j.b/ to see it.
498 * - Internal changes so that intercepted and fast redirect pages
499 * are not replaced with an image.
500 * - Interceptors now have the option to send a binary page direct
501 * to the client. (i.e. ijb-send-banner uses this)
502 * - Implemented show-url-info interceptor. (Which is why I needed
503 * the above interceptors changes - a typical URL is
504 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
505 * The previous mechanism would not have intercepted that, and
506 * if it had been intercepted then it then it would have replaced
509 * Revision 1.12 2001/05/27 22:17:04 oes
511 * - re_process_buffer no longer writes the modified buffer
512 * to the client, which was very ugly. It now returns the
513 * buffer, which it is then written by chat.
515 * - content_length now adjusts the Content-Length: header
516 * for modified documents rather than crunch()ing it.
517 * (Length info in csp->content_length, which is 0 for
518 * unmodified documents)
520 * - For this to work, sed() is called twice when filtering.
522 * Revision 1.11 2001/05/26 17:27:53 jongfoster
523 * Added support for CLF and fixed LOG_LEVEL_LOG.
524 * Also did CRLF->LF fix of my previous patch.
526 * Revision 1.10 2001/05/26 15:26:15 jongfoster
527 * ACL feature now provides more security by immediately dropping
528 * connections from untrusted hosts.
530 * Revision 1.9 2001/05/26 00:28:36 jongfoster
531 * Automatic reloading of config file.
532 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
533 * Most of the global variables have been moved to a new
534 * struct configuration_spec, accessed through csp->config->globalname
535 * Most of the globals remaining are used by the Win32 GUI.
537 * Revision 1.8 2001/05/25 22:43:18 jongfoster
538 * Fixing minor memory leak and buffer overflow.
540 * Revision 1.7 2001/05/25 22:34:30 jongfoster
543 * Revision 1.6 2001/05/23 00:13:58 joergs
544 * AmigaOS support fixed.
546 * Revision 1.5 2001/05/22 18:46:04 oes
548 * - Enabled filtering banners by size rather than URL
549 * by adding patterns that replace all standard banner
550 * sizes with the "Junkbuster" gif to the re_filterfile
552 * - Enabled filtering WebBugs by providing a pattern
553 * which kills all 1x1 images
555 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
556 * which is selected by the (nonstandard and therefore
557 * capital) letter 'U' in the option string.
558 * It causes the quantifiers to be ungreedy by default.
559 * Appending a ? turns back to greedy (!).
561 * - Added a new interceptor ijb-send-banner, which
562 * sends back the "Junkbuster" gif. Without imagelist or
563 * MSIE detection support, or if tinygif = 1, or the
564 * URL isn't recognized as an imageurl, a lame HTML
565 * explanation is sent instead.
567 * - Added new feature, which permits blocking remote
568 * script redirects and firing back a local redirect
570 * The feature is conditionally compiled, i.e. it
571 * can be disabled with --disable-fast-redirects,
572 * plus it must be activated by a "fast-redirects"
573 * line in the config file, has its own log level
574 * and of course wants to be displayed by show-proxy-args
575 * Note: Boy, all the #ifdefs in 1001 locations and
576 * all the fumbling with configure.in and acconfig.h
577 * were *way* more work than the feature itself :-(
579 * - Because a generic redirect template was needed for
580 * this, tinygif = 3 now uses the same.
582 * - Moved GIFs, and other static HTTP response templates
587 * - Removed some >400 CRs again (Jon, you really worked
590 * Revision 1.4 2001/05/21 19:34:01 jongfoster
591 * Made failure to bind() a fatal error.
593 * Revision 1.3 2001/05/20 01:21:20 jongfoster
594 * Version 2.9.4 checkin.
595 * - Merged popupfile and cookiefile, and added control over PCRS
596 * filtering, in new "permissionsfile".
597 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
598 * file error you now get a message box (in the Win32 GUI) rather
599 * than the program exiting with no explanation.
600 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
602 * - Removed tabs from "config"
603 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
604 * - Bumped up version number.
606 * Revision 1.2 2001/05/17 22:34:44 oes
607 * - Added hint on GIF char array generation to jcc.c
608 * - Cleaned CRLF's from the sources and related files
609 * - Repaired logging for REF and FRC
611 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
612 * Initial import of version 2.9.3 source tree
615 *********************************************************************/
621 #include <sys/types.h>
628 #ifdef FEATURE_PTHREAD
630 #endif /* def FEATURE_PTHREAD */
633 # ifndef FEATURE_PTHREAD
637 # include <windows.h>
638 # include <process.h>
639 # endif /* ndef FEATURE_PTHREAD */
642 # ifndef _WIN_CONSOLE
644 # endif /* ndef _WIN_CONSOLE */
646 #else /* ifndef _WIN32 */
648 # if !defined (__OS2__)
650 # include <sys/wait.h>
651 # endif /* ndef __OS2__ */
652 # include <sys/time.h>
653 # include <sys/stat.h>
654 # include <sys/ioctl.h>
657 #include <sys/termios.h>
668 # include <socket.h> /* BeOS has select() for sockets only. */
669 # include <OS.h> /* declarations for threads and stuff. */
672 # if defined(__EMX__) || defined(__OS2__)
673 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
678 #define bzero(B,N) memset(B,0x00,n)
693 #include "killpopup.h"
694 #include "miscutil.h"
696 #include "jbsockets.h"
701 #include "urlmatch.h"
703 const char jcc_h_rcs[] = JCC_H_VERSION;
704 const char project_h_rcs[] = PROJECT_H_VERSION;
707 struct client_state clients[1];
708 struct file_list files[1];
710 #ifdef FEATURE_STATISTICS
711 int urls_read = 0; /* total nr of urls read inc rejected */
712 int urls_rejected = 0; /* total nr of urls rejected */
713 #endif /* def FEATURE_STATISTICS */
715 #ifdef FEATURE_GRACEFUL_TERMINATION
719 static void listen_loop(void);
720 static void chat(struct client_state *csp);
722 void serve(struct client_state *csp);
723 #else /* ifndef AMIGA */
724 static void serve(struct client_state *csp);
725 #endif /* def AMIGA */
728 static int32 server_thread(void *data);
729 #endif /* def __BEOS__ */
732 #define sleep(N) Sleep(((N) * 1000))
736 #define sleep(N) DosSleep(((N) * 100))
741 * Hit OSX over the head with a hammer. Protect all *_r functions.
743 pthread_mutex_t gmtime_mutex;
744 pthread_mutex_t localtime_mutex;
745 pthread_mutex_t gethostbyaddr_mutex;
746 pthread_mutex_t gethostbyname_mutex;
747 #endif /* def OSX_DARWIN */
749 #ifdef FEATURE_PTHREAD
750 pthread_mutex_t log_mutex;
751 pthread_mutex_t log_init_mutex;
752 #endif /* FEATURE_PTHREAD */
754 #if defined(unix) || defined(__EMX__)
755 const char *basedir = NULL;
756 const char *pidfile = NULL;
757 int received_hup_signal = 0;
758 #endif /* defined unix */
760 /* The vanilla wafer. */
761 static const char VANILLA_WAFER[] =
762 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
763 "Do_not_send_me_any_copyrighted_information_other_than_the_"
764 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
765 "In_particular_do_not_send_me_any_cookies_that_"
766 "are_subject_to_a_claim_of_copyright_by_anybody._"
767 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
768 "(copyright_or_otherwise)_applying_to_any_cookie._";
771 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
772 /*********************************************************************
774 * Function : sig_handler
776 * Description : Signal handler for different signals.
777 * Exit gracefully on ABRT, TERM and INT
778 * or set a flag that will cause the errlog
779 * to be reopened by the main thread on HUP.
782 * 1 : the_signal = the signal cause this function to call
786 *********************************************************************/
787 static void sig_handler(int the_signal)
794 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
802 received_hup_signal = 1;
807 * We shouldn't be here, unless we catch signals
808 * in main() that we can't handle here!
810 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
818 /*********************************************************************
822 * Description : Once a connection to the client has been accepted,
823 * this function is called (via serve()) to handle the
824 * main business of the communication. When this
825 * function returns, the caller must close the client
829 * 1 : csp = Current client state (buffers, headers, etc...)
831 * Returns : On success, the number of bytes written are returned (zero
832 * indicates nothing was written). On error, -1 is returned,
833 * and errno is set appropriately. If count is zero and the
834 * file descriptor refers to a regular file, 0 will be
835 * returned without causing any other effect. For a special
836 * file, the results are not portable.
838 *********************************************************************/
839 static void chat(struct client_state *csp)
842 * This next lines are a little ugly, but they simplifies the if statements
843 * below. Basically if TOGGLE, then we want the if to test if the
844 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
845 * then we want the if to test for CSP_FLAG_FORCED , else we don't
847 #ifdef FEATURE_TOGGLE
848 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
849 #else /* ifndef FEATURE_TOGGLE */
850 # define IS_TOGGLED_ON_AND
851 #endif /* ndef FEATURE_TOGGLE */
852 #ifdef FEATURE_FORCE_LOAD
853 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
854 #else /* ifndef FEATURE_FORCE_LOAD */
855 # define IS_NOT_FORCED_AND
856 #endif /* def FEATURE_FORCE_LOAD */
858 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
860 char buf[BUFFER_SIZE];
868 int ms_iis5_hack = 0;
870 unsigned int socks_retries = 0;
871 const struct forward_spec * fwd;
872 struct http_request *http;
873 int len; /* for buffer sizes */
874 #ifdef FEATURE_KILL_POPUPS
875 int block_popups; /* bool, 1==will block popups */
876 int block_popups_now = 0; /* bool, 1==currently blocking popups */
877 #endif /* def FEATURE_KILL_POPUPS */
879 int pcrs_filter; /* bool, 1==will filter through pcrs */
880 int gif_deanimate; /* bool, 1==will deanimate gifs */
881 int jpeg_inspect; /* bool, 1==will inspect jpegs */
883 /* Function that does the content filtering for the current request */
884 char *(*content_filter)() = NULL;
886 /* Skeleton for HTTP response, if we should intercept the request */
887 struct http_response *rsp;
892 * Read the client's request. Note that since we're not using select() we
893 * could get blocked here if a client connected, then didn't say anything!
898 len = read_socket(csp->cfd, buf, sizeof(buf));
900 if (len <= 0) break; /* error! */
903 * If there is no memory left for buffering the
904 * request, there is nothing we can do but hang up
906 if (add_to_iob(csp, buf, len))
911 req = get_header(csp);
915 break; /* no HTTP request! */
920 continue; /* more to come! */
923 #ifdef FEATURE_FORCE_LOAD
924 /* If this request contains the FORCE_PREFIX,
925 * better get rid of it now and set the force flag --oes
928 if (strstr(req, FORCE_PREFIX))
930 strclean(req, FORCE_PREFIX);
931 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
932 csp->flags |= CSP_FLAG_FORCED;
935 #endif /* def FEATURE_FORCE_LOAD */
937 parse_http_request(req, http, csp);
942 if (http->cmd == NULL)
944 strcpy(buf, CHEADER);
945 write_socket(csp->cfd, buf, strlen(buf));
947 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
949 free_http_request(http);
953 /* decide how to route the HTTP request */
955 if ((fwd = forward_url(http, csp)) == NULL)
957 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
958 /* Never get here - LOG_LEVEL_FATAL causes program exit */
961 /* build the http request to send to the server
962 * we have to do one of the following:
964 * create = use the original HTTP request to create a new
965 * HTTP request that has either the path component
966 * without the http://domainspec (w/path) or the
967 * full orininal URL (w/url)
968 * Note that the path and/or the HTTP version may
969 * have been altered by now.
971 * connect = Open a socket to the host:port of the server
972 * and short-circuit server and client socket.
974 * pass = Pass the request unchanged if forwarding a CONNECT
975 * request to a parent proxy. Note that we'll be sending
976 * the CFAIL message ourselves if connecting to the parent
977 * fails, but we won't send a CSUCCEED message if it works,
978 * since that would result in a double message (ours and the
979 * parent's). After sending the request to the parent, we simply
985 * +--------+--------+
987 * 0 | create | connect|
989 * Forwarding +--------+--------+
991 * 1 | create | pass |
993 * +--------+--------+
998 * Determine the actions for this URL
1000 #ifdef FEATURE_TOGGLE
1001 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
1003 /* Most compatible set of actions (i.e. none) */
1004 init_current_action(csp->action);
1007 #endif /* ndef FEATURE_TOGGLE */
1009 url_actions(http, csp);
1014 * Check if a CONNECT request is allowable:
1015 * In the absence of a +limit-connect action, allow only port 443.
1016 * If there is an action, allow whatever matches the specificaton.
1020 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
1021 || (csp->action->flags & ACTION_LIMIT_CONNECT
1022 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
1024 if (csp->action->flags & ACTION_TREAT_FORBIDDEN_CONNECTS_LIKE_BLOCKS)
1026 /* The response will violate the specs, but makes unblocking easier. */
1027 log_error(LOG_LEVEL_ERROR, "Marking suspicious CONNECT request from %s for blocking.",
1029 csp->action->flags |= ACTION_BLOCK;
1034 strcpy(buf, CFORBIDDEN);
1035 write_socket(csp->cfd, buf, strlen(buf));
1036 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
1037 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
1045 * Downgrade http version from 1.1 to 1.0 if +downgrade
1048 if ( (http->ssl == 0)
1049 && (!strcmpic(http->ver, "HTTP/1.1"))
1050 && (csp->action->flags & ACTION_DOWNGRADE))
1053 http->ver = strdup("HTTP/1.0");
1055 if (http->ver == NULL)
1057 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1062 * Save a copy of the original request for logging
1064 http->ocmd = strdup(http->cmd);
1066 if (http->ocmd == NULL)
1068 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
1072 * (Re)build the HTTP request for non-SSL requests.
1073 * If forwarding, use the whole URL, else, use only the path.
1079 http->cmd = strdup(http->gpc);
1080 string_append(&http->cmd, " ");
1082 if (fwd->forward_host)
1084 string_append(&http->cmd, http->url);
1088 string_append(&http->cmd, http->path);
1090 string_append(&http->cmd, " ");
1091 string_append(&http->cmd, http->ver);
1093 if (http->cmd == NULL)
1095 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1097 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", http->cmd);
1099 enlist(csp->headers, http->cmd);
1103 * If the user has not supplied any wafers, and the user has not
1104 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1106 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1107 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1109 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1113 #ifdef FEATURE_KILL_POPUPS
1114 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
1115 #endif /* def FEATURE_KILL_POPUPS */
1117 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
1118 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
1120 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
1122 jpeg_inspect = ((csp->action->flags & ACTION_JPEG_INSPECT) != 0);
1124 /* grab the rest of the client's headers */
1128 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1130 len = read_socket(csp->cfd, buf, sizeof(buf));
1133 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1138 * If there is no memory left for buffering the
1139 * request, there is nothing we can do but hang up
1141 if (add_to_iob(csp, buf, len))
1148 if (p == NULL) break;
1150 enlist(csp->headers, p);
1155 * We have a request. Now, check to see if we need to
1156 * intercept it, i.e. If ..
1160 /* We may not forward the request by rfc2616 sect 14.31 */
1161 (NULL != (rsp = direct_response(csp)))
1163 /* or a CGI call was detected and answered */
1164 || (NULL != (rsp = dispatch_cgi(csp)))
1166 /* or we are enabled and... */
1167 || (IS_ENABLED_AND (
1169 /* ..the request was blocked */
1170 ( NULL != (rsp = block_url(csp)))
1172 /* ..or untrusted */
1173 #ifdef FEATURE_TRUST
1174 || ( NULL != (rsp = trust_url(csp)))
1175 #endif /* def FEATURE_TRUST */
1177 /* ..or a fast redirect kicked in */
1178 #ifdef FEATURE_FAST_REDIRECTS
1179 || (((csp->action->flags & ACTION_FAST_REDIRECTS) != 0) &&
1180 (NULL != (rsp = redirect_url(csp))))
1181 #endif /* def FEATURE_FAST_REDIRECTS */
1185 /* Write the answer to the client */
1186 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1187 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1189 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1192 #ifdef FEATURE_STATISTICS
1193 /* Count as a rejected request */
1194 csp->flags |= CSP_FLAG_REJECTED;
1195 #endif /* def FEATURE_STATISTICS */
1197 /* Log (FIXME: All intercept reasons appear as "crunch" with Status 200) */
1198 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
1199 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
1201 /* Clean up and return */
1202 free_http_response(rsp);
1206 hdr = sed(client_patterns, add_client_headers, csp);
1209 /* FIXME Should handle error properly */
1210 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1213 list_remove_all(csp->headers);
1215 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1217 if (fwd->forward_host)
1219 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1220 fwd->forward_host, fwd->forward_port, http->hostport);
1224 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1227 /* here we connect to the server, gateway, or the forwarder */
1229 while ( (csp->sfd = forwarded_connect(fwd, http, csp))
1230 && (errno == EINVAL) && (socks_retries++ < 3))
1232 log_error(LOG_LEVEL_ERROR, "failed request #%u to connect to %s. Trying again.",
1233 socks_retries, http->hostport);
1236 if (csp->sfd == JB_INVALID_SOCKET)
1238 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1241 if (errno == EINVAL)
1243 rsp = error_response(csp, "no-such-domain", errno);
1245 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
1246 csp->ip_addr_str, http->ocmd);
1250 rsp = error_response(csp, "connect-failed", errno);
1252 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1253 csp->ip_addr_str, http->ocmd);
1257 /* Write the answer to the client */
1260 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1261 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1263 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1267 free_http_response(rsp);
1272 log_error(LOG_LEVEL_CONNECT, "OK");
1274 if (fwd->forward_host || (http->ssl == 0))
1276 /* write the client's (modified) header to the server
1277 * (along with anything else that may be in the buffer)
1280 if (write_socket(csp->sfd, hdr, strlen(hdr))
1281 || (flush_socket(csp->sfd, csp) < 0))
1283 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1286 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1287 csp->ip_addr_str, http->ocmd);
1289 rsp = error_response(csp, "connect-failed", errno);
1293 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1294 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1296 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1300 free_http_response(rsp);
1308 * We're running an SSL tunnel and we're not forwarding,
1309 * so just send the "connect succeeded" message to the
1310 * client, flush the rest, and get out of the way.
1312 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1313 csp->ip_addr_str, http->ocmd);
1315 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
1323 /* we're finished with the client's header */
1326 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1328 /* pass data between the client and server
1329 * until one or the other shuts down the connection.
1338 * FD_ZERO here seems to point to an errant macro which crashes.
1339 * So do this by hand for now...
1341 memset(&rfds,0x00,sizeof(fd_set));
1345 FD_SET(csp->cfd, &rfds);
1346 FD_SET(csp->sfd, &rfds);
1348 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
1352 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1356 /* this is the body of the browser's request
1357 * just read it and write it.
1360 if (FD_ISSET(csp->cfd, &rfds))
1362 len = read_socket(csp->cfd, buf, sizeof(buf));
1366 break; /* "game over, man" */
1369 if (write_socket(csp->sfd, buf, (size_t)len))
1371 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1378 * The server wants to talk. It could be the header or the body.
1379 * If `hdr' is null, then it's the header otherwise it's the body.
1380 * FIXME: Does `hdr' really mean `host'? No.
1384 if (FD_ISSET(csp->sfd, &rfds))
1387 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1391 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1393 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1394 csp->ip_addr_str, http->ocmd);
1396 rsp = error_response(csp, "connect-failed", errno);
1400 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1401 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1403 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1407 free_http_response(rsp);
1411 /* Add a trailing zero. This lets filter_popups
1412 * use string operations.
1416 #ifdef FEATURE_KILL_POPUPS
1417 /* Filter the popups on this read. */
1418 if (block_popups_now)
1420 filter_popups(buf, csp);
1422 #endif /* def FEATURE_KILL_POPUPS */
1424 /* Normally, this would indicate that we've read
1425 * as much as the server has sent us and we can
1426 * close the client connection. However, Microsoft
1427 * in its wisdom has released IIS/5 with a bug that
1428 * prevents it from sending the trailing \r\n in
1429 * a 302 redirect header (and possibly other headers).
1430 * To work around this if we've haven't parsed
1431 * a full header we'll append a trailing \r\n
1432 * and see if this now generates a valid one.
1434 * This hack shouldn't have any impacts. If we've
1435 * already transmitted the header or if this is a
1436 * SSL connection, then we won't bother with this
1437 * hack. So we only work on partially received
1438 * headers. If we append a \r\n and this still
1439 * doesn't generate a valid header, then we won't
1440 * transmit anything to the client.
1445 if (server_body || http->ssl)
1448 * If we have been buffering up the document,
1449 * now is the time to apply content modification
1450 * and send the result to the client.
1455 * If the content filter fails, use the original
1456 * buffer and length.
1457 * (see p != NULL ? p : csp->iob->cur below)
1459 if (NULL == (p = (*content_filter)(csp)))
1461 csp->content_length = csp->iob->eod - csp->iob->cur;
1464 hdr = sed(server_patterns_light, NULL, csp);
1468 /* FIXME Should handle error properly */
1469 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1472 if (write_socket(csp->cfd, hdr, strlen(hdr))
1473 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
1475 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1485 break; /* "game over, man" */
1489 * This is NOT the body, so
1490 * Let's pretend the server just sent us a blank line.
1492 len = sprintf(buf, "\r\n");
1495 * Now, let the normal header parsing algorithm below do its
1496 * job. If it fails, we'll exit instead of continuing.
1503 * If this is an SSL connection or we're in the body
1504 * of the server document, just write it to the client,
1505 * unless we need to buffer the body for later content-filtering
1508 if (server_body || http->ssl)
1513 * If there is no memory left for buffering the content, or the buffer limit
1514 * has been reached, switch to non-filtering mode, i.e. make & write the
1515 * header, flush the iob and buf, and get out of the way.
1517 if (add_to_iob(csp, buf, len))
1522 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
1524 hdr = sed(server_patterns, add_server_headers, csp);
1528 * Memory is too tight to even generate the header.
1529 * Send our static "Out-of-memory" page.
1531 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
1532 rsp = cgi_error_memory();
1534 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1535 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1537 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1542 hdrlen = strlen(hdr);
1544 if (write_socket(csp->cfd, hdr, hdrlen)
1545 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
1546 || (write_socket(csp->cfd, buf, (size_t) len)))
1548 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
1554 byte_count += hdrlen + flushed + len;
1556 content_filter = NULL;
1563 if (write_socket(csp->cfd, buf, (size_t)len))
1565 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
1574 /* we're still looking for the end of the
1575 * server's header ... (does that make header
1576 * parsing an "out of body experience" ?
1580 * buffer up the data we just read. If that fails,
1581 * there's little we can do but send our static
1582 * out-of-memory page.
1584 if (add_to_iob(csp, buf, len))
1586 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
1587 rsp = cgi_error_memory();
1589 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1590 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1592 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1597 /* get header lines from the iob */
1599 while ((p = get_header(csp)) != NULL)
1603 /* see following note */
1606 enlist(csp->headers, p);
1610 /* NOTE: there are no "empty" headers so
1611 * if the pointer `p' is not NULL we must
1612 * assume that we reached the end of the
1613 * buffer before we hit the end of the header.
1620 /* Well, we tried our MS IIS/5
1621 * hack and it didn't work.
1622 * The header is incomplete
1623 * and there isn't anything
1624 * we can do about it.
1630 /* Since we have to wait for
1631 * more from the server before
1632 * we can parse the headers
1633 * we just continue here.
1639 /* we have now received the entire header.
1640 * filter it and send the result to the client
1643 hdr = sed(server_patterns, add_server_headers, csp);
1646 /* FIXME Should handle error properly */
1647 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1650 #ifdef FEATURE_KILL_POPUPS
1651 /* Start blocking popups if appropriate. */
1653 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1654 !http->ssl && /* We talk plaintext */
1655 block_popups) /* Policy allows */
1657 block_popups_now = 1;
1659 * Filter the part of the body that came in the same read
1660 * as the last headers:
1662 filter_popups(csp->iob->cur, csp);
1665 #endif /* def FEATURE_KILL_POPUPS */
1667 /* Buffer and pcrs filter this if appropriate. */
1669 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1670 !http->ssl && /* We talk plaintext */
1671 pcrs_filter) /* Policy allows */
1673 content_filter = pcrs_filter_response;
1676 /* Buffer and gif_deanimate this if appropriate. */
1678 if ((csp->content_type & CT_GIF) && /* It's an image/gif MIME-Type */
1679 !http->ssl && /* We talk plaintext */
1680 gif_deanimate) /* Policy allows */
1682 content_filter = gif_deanimate_response;
1685 /* Buffer and jpg_inspect this if appropriate. */
1687 if ((csp->content_type & CT_JPEG) && /* It's an image/jpeg MIME-Type */
1688 !http->ssl && /* We talk plaintext */
1689 jpeg_inspect) /* Policy allows */
1691 content_filter = jpeg_inspect_response;
1695 * Only write if we're not buffering for content modification
1697 if (!content_filter)
1699 /* write the server's (modified) header to
1700 * the client (along with anything else that
1701 * may be in the buffer)
1704 if (write_socket(csp->cfd, hdr, strlen(hdr))
1705 || ((len = flush_socket(csp->cfd, csp)) < 0))
1707 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1709 /* the write failed, so don't bother
1710 * mentioning it to the client...
1711 * it probably can't hear us anyway.
1720 /* we're finished with the server's header */
1725 /* If this was a MS IIS/5 hack then it means
1726 * the server has already closed the
1727 * connection. Nothing more to read. Time
1738 return; /* huh? we should never get here */
1741 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
1742 csp->ip_addr_str, http->ocmd, byte_count);
1746 /*********************************************************************
1750 * Description : This is little more than chat. We only "serve" to
1751 * to close any socket that chat may have opened.
1754 * 1 : csp = Current client state (buffers, headers, etc...)
1758 *********************************************************************/
1760 void serve(struct client_state *csp)
1761 #else /* ifndef AMIGA */
1762 static void serve(struct client_state *csp)
1763 #endif /* def AMIGA */
1766 close_socket(csp->cfd);
1768 if (csp->sfd != JB_INVALID_SOCKET)
1770 close_socket(csp->sfd);
1773 csp->flags &= ~CSP_FLAG_ACTIVE;
1779 /*********************************************************************
1781 * Function : server_thread
1783 * Description : We only exist to call `serve' in a threaded environment.
1786 * 1 : data = Current client state (buffers, headers, etc...)
1788 * Returns : Always 0.
1790 *********************************************************************/
1791 static int32 server_thread(void *data)
1793 serve((struct client_state *) data);
1800 /*********************************************************************
1804 * Description : Print usage info & exit.
1806 * Parameters : Pointer to argv[0] for identifying ourselves
1810 *********************************************************************/
1811 void usage(const char *myname)
1813 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
1815 "Usage: %s [--help] [--version] [configfile]\n"
1817 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
1819 "Aborting.\n", myname);
1826 /*********************************************************************
1830 * Description : Load the config file and start the listen loop.
1831 * This function is a lot more *sane* with the `load_config'
1832 * and `listen_loop' functions; although it stills does
1833 * a *little* too much for my taste.
1836 * 1 : argc = Number of parameters (including $0).
1837 * 2 : argv = Array of (char *)'s to the parameters.
1839 * Returns : 1 if : can't open config file, unrecognized directive,
1840 * stats requested in multi-thread mode, can't open the
1841 * log file, can't open the jar file, listen port is invalid,
1842 * any load fails, and can't bind port.
1844 * Else main never returns, the process must be signaled
1845 * to terminate execution. Or, on Windows, use the
1846 * "File", "Exit" menu option.
1848 *********************************************************************/
1850 int real_main(int argc, const char *argv[])
1852 int main(int argc, const char *argv[])
1857 struct passwd *pw = NULL;
1858 struct group *grp = NULL;
1867 #if !defined(_WIN32)
1875 * Parse the command line arguments
1877 while (++argc_pos < argc)
1879 if (strcmp(argv[argc_pos], "--help") == 0)
1884 else if(strcmp(argv[argc_pos], "--version") == 0)
1886 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
1892 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
1897 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
1899 if (++argc_pos == argc) usage(argv[0]);
1900 pidfile = strdup(argv[argc_pos]);
1903 else if (strcmp(argv[argc_pos], "--user" ) == 0)
1905 if (++argc_pos == argc) usage(argv[argc_pos]);
1907 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
1910 if (NULL == (grp = getgrnam(p)))
1912 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
1916 if (NULL == (pw = getpwnam(argv[argc_pos])))
1918 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
1921 if (p != NULL) *--p = '\0';
1924 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
1929 #endif /* defined(unix) */
1933 configfile = argv[argc_pos];
1936 } /* -END- while (more arguments) */
1939 if ( *configfile != '/' )
1941 char *abs_file, cwd[1024];
1943 /* make config-filename absolute here */
1944 if ( !(getcwd(cwd, sizeof(cwd))))
1946 perror("get working dir failed");
1950 if (!(basedir = strdup(cwd))
1951 || (!(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))))
1953 perror("malloc failed");
1956 strcpy( abs_file, basedir );
1957 strcat( abs_file, "/" );
1958 strcat( abs_file, configfile );
1959 configfile = abs_file;
1961 #endif /* defined unix */
1965 clients->next = NULL;
1969 #elif defined(_WIN32)
1975 * Prepare global mutex semaphores
1977 pthread_mutex_init(&gmtime_mutex,0);
1978 pthread_mutex_init(&localtime_mutex,0);
1979 pthread_mutex_init(&gethostbyaddr_mutex,0);
1980 pthread_mutex_init(&gethostbyname_mutex,0);
1981 #endif /* def OSX_DARWIN */
1983 #ifdef FEATURE_PTHREAD
1984 pthread_mutex_init(&log_mutex,0);
1985 pthread_mutex_init(&log_init_mutex,0);
1986 #endif /* FEATURE_PTHREAD */
1989 * Unix signal handling
1991 * Catch the abort, interrupt and terminate signals for a graceful exit
1992 * Catch the hangup signal so the errlog can be reopened.
1993 * Ignore the broken pipe signals (FIXME: Why?)
1995 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1998 const int catched_signals[] = { SIGABRT, SIGTERM, SIGINT, SIGHUP, 0 };
1999 const int ignored_signals[] = { SIGPIPE, 0 };
2001 for (idx = 0; catched_signals[idx] != 0; idx++)
2003 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
2005 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
2009 for (idx = 0; ignored_signals[idx] != 0; idx++)
2011 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
2013 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
2018 #else /* ifdef _WIN32 */
2019 # ifdef _WIN_CONSOLE
2021 * We *are* in a windows console app.
2022 * Print a verbose messages about FAQ's and such
2024 printf(win32_blurb);
2025 # endif /* def _WIN_CONSOLE */
2026 #endif /* def _WIN32 */
2029 /* Initialize the CGI subsystem */
2030 cgi_init_error_messages();
2033 * If runnig on unix and without the --nodaemon
2034 * option, become a daemon. I.e. fork, detach
2035 * from tty and get process group leadership
2048 if ( pid < 0 ) /* error */
2053 else if ( pid != 0 ) /* parent */
2058 * must check for errors
2059 * child died due to missing files aso
2062 wpid = waitpid( pid, &status, WNOHANG );
2071 /* Should be more portable, but not as well tested */
2076 #else /* ndef __FreeBSD__ */
2078 #endif /* ndef __FreeBSD__ */
2079 fd = open("/dev/tty", O_RDONLY);
2082 /* no error check here */
2083 ioctl( fd, TIOCNOTTY,0 );
2087 /* FIXME: should close stderr (fd 2) here too, but the test
2089 * and load config file is done in listen_loop() and puts
2090 * some messages on stderr there.
2097 } /* -END- if (!no_daemon) */
2100 * As soon as we have written the PID file, we can switch
2101 * to the user and group ID indicated by the --user option
2107 if (((NULL != grp) && setgid(grp->gr_gid)) || (setgid(pw->pw_gid)))
2109 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
2115 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
2117 if (chroot(pw->pw_dir) < 0)
2119 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
2123 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
2126 if (setuid(pw->pw_uid))
2128 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
2132 char putenv_dummy[64];
2134 strcpy(putenv_dummy, "HOME=/");
2135 if (putenv(putenv_dummy) != 0)
2137 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
2140 snprintf(putenv_dummy, 64, "USER=%s", pw->pw_name);
2141 if (putenv(putenv_dummy) != 0)
2143 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
2149 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
2152 #endif /* defined unix */
2162 /*********************************************************************
2164 * Function : bind_port_helper
2166 * Description : Bind the listen port. Handles logging, and aborts
2170 * 1 : config = Privoxy configuration. Specifies port
2173 * Returns : Port that was opened.
2175 *********************************************************************/
2176 static jb_socket bind_port_helper(struct configuration_spec * config)
2181 if ( (config->haddr != NULL)
2182 && (config->haddr[0] == '1')
2183 && (config->haddr[1] == '2')
2184 && (config->haddr[2] == '7')
2185 && (config->haddr[3] == '.') )
2187 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
2190 else if (config->haddr == NULL)
2192 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
2197 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
2198 config->hport, config->haddr);
2201 result = bind_port(config->haddr, config->hport, &bfd);
2208 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2209 "There may be another Privoxy or some other "
2210 "proxy running on port %d",
2211 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
2212 config->hport, config->hport);
2215 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2216 "The hostname is not resolvable",
2217 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2220 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
2221 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2224 /* shouldn't get here */
2225 return JB_INVALID_SOCKET;
2228 config->need_bind = 0;
2235 /* Without this simple workaround we get this compiler warning from _beginthread
2236 * warning C4028: formal parameter 1 different from declaration
2238 void w32_service_listen_loop(void *p)
2242 #endif /* def _WIN32 */
2245 /*********************************************************************
2247 * Function : listen_loop
2249 * Description : bind the listen port and enter a "FOREVER" listening loop.
2255 *********************************************************************/
2256 static void listen_loop(void)
2258 struct client_state *csp = NULL;
2260 struct configuration_spec * config;
2262 config = load_config();
2264 bfd = bind_port_helper(config);
2266 #ifdef FEATURE_GRACEFUL_TERMINATION
2267 while (!g_terminate)
2272 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
2273 while (waitpid(-1, NULL, WNOHANG) > 0)
2275 /* zombie children */
2277 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
2280 * Free data that was used by died threads
2286 * Re-open the errlog after HUP signal
2288 if (received_hup_signal)
2290 init_error_log(Argv[0], config->logfile, config->debug);
2291 received_hup_signal = 0;
2296 #ifdef FEATURE_COOKIE_JAR
2298 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
2299 * already open. I think unload_configfile() is not being run, which should do
2300 * this work. Until that can get resolved, we'll use this workaround.
2304 if (csp->config->jar)
2306 fclose(csp->config->jar);
2307 csp->config->jar = NULL;
2309 #endif /* FEATURE_COOKIE_JAR */
2310 #endif /* __OS2__ */
2312 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
2314 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
2318 csp->flags |= CSP_FLAG_ACTIVE;
2319 csp->sfd = JB_INVALID_SOCKET;
2321 csp->config = config = load_config();
2323 if ( config->need_bind )
2326 * Since we were listening to the "old port", we will not see
2327 * a "listen" param change until the next IJB request. So, at
2328 * least 1 more request must be made for us to find the new
2329 * setting. I am simply closing the old socket and binding the
2332 * Which-ever is correct, we will serve 1 more page via the
2333 * old settings. This should probably be a "show-proxy-args"
2334 * request. This should not be a so common of an operation
2335 * that this will hurt people's feelings.
2340 bfd = bind_port_helper(config);
2343 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
2345 if (!accept_connection(csp, bfd))
2347 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
2360 log_error(LOG_LEVEL_CONNECT, "OK");
2363 #ifdef FEATURE_TOGGLE
2364 if (global_toggle_state)
2366 csp->flags |= CSP_FLAG_TOGGLED_ON;
2368 #endif /* def FEATURE_TOGGLE */
2370 if (run_loader(csp))
2372 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
2373 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2377 if (block_acl(NULL,csp))
2379 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
2380 close_socket(csp->cfd);
2384 #endif /* def FEATURE_ACL */
2386 /* add it to the list of clients */
2387 csp->next = clients->next;
2388 clients->next = csp;
2390 if (config->multi_threaded)
2394 /* this is a switch () statment in the C preprocessor - ugh */
2395 #undef SELECTED_ONE_OPTION
2397 /* Use Pthreads in preference to native code */
2398 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
2399 #define SELECTED_ONE_OPTION
2401 pthread_t the_thread;
2402 pthread_attr_t attrs;
2404 pthread_attr_init(&attrs);
2405 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
2406 errno = pthread_create(&the_thread, &attrs,
2408 child_id = errno ? -1 : 0;
2409 pthread_attr_destroy(&attrs);
2413 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
2414 #define SELECTED_ONE_OPTION
2415 child_id = _beginthread(
2416 (void (*)(void *))serve,
2421 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
2422 #define SELECTED_ONE_OPTION
2423 child_id = _beginthread(
2424 (void(* _Optlink)(void*))serve,
2430 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
2431 #define SELECTED_ONE_OPTION
2433 thread_id tid = spawn_thread
2434 (server_thread, "server", B_NORMAL_PRIORITY, csp);
2436 if ((tid >= 0) && (resume_thread(tid) == B_OK))
2438 child_id = (int) tid;
2447 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2448 #define SELECTED_ONE_OPTION
2449 csp->cfd = ReleaseSocket(csp->cfd, -1);
2451 if((child_id = (int)CreateNewProcTags(
2452 NP_Entry, (ULONG)server_thread,
2453 NP_Output, Output(),
2454 NP_CloseOutput, FALSE,
2455 NP_Name, (ULONG)"privoxy child",
2456 NP_StackSize, 200*1024,
2460 ((struct Task *)child_id)->tc_UserData = csp;
2461 Signal((struct Task *)child_id, SIGF_SINGLE);
2466 #if !defined(SELECTED_ONE_OPTION)
2469 /* This block is only needed when using fork().
2470 * When using threads, the server thread was
2471 * created and run by the call to _beginthread().
2473 if (child_id == 0) /* child */
2476 #ifdef FEATURE_TOGGLE
2477 int inherited_toggle_state = global_toggle_state;
2478 #endif /* def FEATURE_TOGGLE */
2483 * If we've been toggled or we've blocked the request, tell Mom
2486 #ifdef FEATURE_TOGGLE
2487 if (inherited_toggle_state != global_toggle_state)
2489 rc |= RC_FLAG_TOGGLED;
2491 #endif /* def FEATURE_TOGGLE */
2493 #ifdef FEATURE_STATISTICS
2494 if (csp->flags & CSP_FLAG_REJECTED)
2496 rc |= RC_FLAG_BLOCKED;
2498 #endif /* ndef FEATURE_STATISTICS */
2502 else if (child_id > 0) /* parent */
2504 /* in a fork()'d environment, the parent's
2505 * copy of the client socket and the CSP
2509 #if !defined(_WIN32) && !defined(__CYGWIN__)
2511 wait( &child_status );
2514 * Evaluate child's return code: If the child has
2515 * - been toggled, toggle ourselves
2516 * - blocked its request, bump up the stats counter
2519 #ifdef FEATURE_TOGGLE
2520 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
2522 global_toggle_state = !global_toggle_state;
2524 #endif /* def FEATURE_TOGGLE */
2526 #ifdef FEATURE_STATISTICS
2528 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
2532 #endif /* def FEATURE_STATISTICS */
2534 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
2535 close_socket(csp->cfd);
2536 csp->flags &= ~CSP_FLAG_ACTIVE;
2540 #undef SELECTED_ONE_OPTION
2541 /* end of cpp switch () */
2543 if (child_id < 0) /* failed */
2545 char buf[BUFFER_SIZE];
2547 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
2549 sprintf(buf , "Privoxy: can't fork: errno = %d", errno);
2551 write_socket(csp->cfd, buf, strlen(buf));
2552 close_socket(csp->cfd);
2553 csp->flags &= ~CSP_FLAG_ACTIVE;
2564 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
2566 /* Clean up. Aim: free all memory (no leaks) */
2567 #ifdef FEATURE_GRACEFUL_TERMINATION
2569 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
2571 unload_current_config_file();
2572 unload_current_actions_file();
2573 unload_current_re_filterfile();
2574 #ifdef FEATURE_TRUST
2575 unload_current_trust_file();
2578 if (config->multi_threaded)
2585 } while ((clients->next != NULL) && (--i > 0));
2589 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
2600 #ifdef FEATURE_COOKIE_JAR
2601 if (NULL != config->jar)
2603 fclose(config->jar);
2607 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
2608 /* Cleanup - remove taskbar icon etc. */
2613 #endif /* FEATURE_GRACEFUL_TERMINATION */