1 const char jcc_rcs[] = "$Id: jcc.c,v 1.92.2.16 2005/04/03 20:10:50 david__schmidt Exp $";
2 /*********************************************************************
4 * File : $Source: /cvsroot/ijbswa/current/Attic/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 1.92.2.16 2005/04/03 20:10:50 david__schmidt
37 * Thanks to Jindrich Makovicka for a race condition fix for the log
38 * file. The race condition remains for non-pthread implementations.
39 * Reference patch #1175720.
41 * Revision 1.92.2.15 2004/10/03 12:53:32 david__schmidt
42 * Add the ability to check jpeg images for invalid
43 * lengths of comment blocks. Defensive strategy
44 * against the exploit:
45 * Microsoft Security Bulletin MS04-028
46 * Buffer Overrun in JPEG Processing (GDI+) Could
47 * Allow Code Execution (833987)
48 * Enabled with +inspect-jpegs in actions files.
50 * Revision 1.92.2.14 2003/12/12 12:52:53 oes
51 * - Fixed usage info for non-unix platforms
52 * - Fixed small cmdline parsing bug
54 * Revision 1.92.2.13 2003/11/27 19:20:27 oes
55 * Diagnostics: Now preserve the returncode of pthread_create
56 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
58 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
59 * No longer ignore SIGCHLD. Fixes bug #769381
61 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
62 * Close jarfile on graceful exit, remove stray line
64 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
65 * Cosmetics: Killed a warning, a typo and an allocation left at exit
67 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
68 * No longer rely on non-POSIX.1 extensions of getcwd().
71 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
72 * Replaced setenv() by posix-compliant putenv()
73 * Thanks to Neil McCalden (nmcc AT users.sf.net).
75 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
76 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
78 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
79 * Clean-up and extension of improvements for forked mode:
80 * - Child's return code now consists of flags RC_FLAG_*
81 * - Reporting toggle to parent now properly #ifdef'ed
82 * - Children now report blocking to parent. This enables
83 * statistics in forked mode
85 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
86 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
87 * Children now report having been toggled through _exit(17), parents
88 * watch for that code and toggle themselves if found.
90 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
91 * Wrapping all *_r functions (the non-_r versions of them) with
92 * mutex semaphores for OSX. Hopefully this will take care of all
93 * of those pesky crash reports.
95 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
96 * Fixed two mostly harmless mem leaks
98 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
99 * Fix: Head of global clients list now initialized to NULL
101 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
102 * Added basic support for OPTIONS and TRACE HTTP methods:
103 * - New interceptor direct_response() added in chat().
104 * - sed() moved to earlier in the process, so that the
105 * Host: header is evaluated before actions and forwarding
108 * Revision 1.92 2002/05/08 16:00:46 oes
109 * Chat's buffer handling:
110 * - Fixed bug with unchecked out-of-mem conditions
111 * while reading client request & server headers
112 * - No longer predict if the buffer limit will be exceeded
113 * in the next read -- check add_to_iob's new
114 * return code. If buffer couldn't be extended
115 * (policy or out-of-mem) while
116 * - reading from client: abort
117 * - reading server headers: send error page
118 * - buffering server body for filter: flush,
119 * and if that fails: send error page
121 * Revision 1.91 2002/04/08 20:35:58 swa
124 * Revision 1.90 2002/04/02 14:57:28 oes
125 * Made sending wafers independent of FEATURE_COOKIE_JAR
127 * Revision 1.89 2002/03/31 17:18:59 jongfoster
128 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
130 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
131 * More compiler warning message maintenance
133 * Revision 1.87 2002/03/26 22:29:54 swa
134 * we have a new homepage!
136 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
137 * Workaround for closing the jarfile before load_config() comes around again
139 * Revision 1.85 2002/03/24 15:23:33 jongfoster
142 * Revision 1.84 2002/03/24 13:25:43 swa
143 * name change related issues
145 * Revision 1.83 2002/03/16 23:54:06 jongfoster
146 * Adding graceful termination feature, to help look for memory leaks.
147 * If you enable this (which, by design, has to be done by hand
148 * editing config.h) and then go to http://i.j.b/die, then the program
149 * will exit cleanly after the *next* request. It should free all the
150 * memory that was used.
152 * Revision 1.82 2002/03/13 00:27:05 jongfoster
155 * Revision 1.81 2002/03/12 01:42:50 oes
156 * Introduced modular filters
158 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
159 * OS/2 port maintenance:
160 * - Fixed EMX build - it had decayed a little
161 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
162 * substituted a memset for now.
164 * Revision 1.79 2002/03/09 20:03:52 jongfoster
165 * - Making various functions return int rather than size_t.
166 * (Undoing a recent change). Since size_t is unsigned on
167 * Windows, functions like read_socket that return -1 on
168 * error cannot return a size_t.
170 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
171 * crashes, and also frequently caused JB to jump to 100%
172 * CPU and stay there. (Because it thought it had just
173 * read ((unsigned)-1) == 4Gb of data...)
175 * - The signature of write_socket has changed, it now simply
176 * returns success=0/failure=nonzero.
178 * - Trying to get rid of a few warnings --with-debug on
179 * Windows, I've introduced a new type "jb_socket". This is
180 * used for the socket file descriptors. On Windows, this
181 * is SOCKET (a typedef for unsigned). Everywhere else, it's
182 * an int. The error value can't be -1 any more, so it's
183 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
184 * Windows it maps to the #define INVALID_SOCKET.)
186 * - The signature of bind_port has changed.
188 * Revision 1.78 2002/03/08 21:35:04 oes
189 * Added optional group supplement to --user option. Will now use default group of user if no group given
191 * Revision 1.77 2002/03/07 03:52:06 oes
192 * - Fixed compiler warnings etc
193 * - Improved handling of failed DNS lookups
195 * Revision 1.76 2002/03/06 22:54:35 jongfoster
196 * Automated function-comment nitpicking.
198 * Revision 1.75 2002/03/06 10:02:19 oes
199 * Fixed stupid bug when --user was not given
201 * Revision 1.74 2002/03/06 00:49:31 jongfoster
202 * Fixing warning on Windows
203 * Making #ifdefs that refer to the same variable consistently
204 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
206 * Revision 1.73 2002/03/05 23:57:30 hal9
207 * Stray character 's' on line 1618 was breaking build.
209 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
210 * - Re-enable OS/2 building after new parms were added
211 * - Fix false out of memory report when resolving CGI templates when no IP
212 * address is available of failed attempt (a la no such domain)
214 * Revision 1.71 2002/03/05 18:13:56 oes
215 * Added --user option
217 * Revision 1.70 2002/03/05 04:52:42 oes
218 * Deleted non-errlog debugging code
220 * Revision 1.69 2002/03/04 23:50:00 jongfoster
221 * Splitting off bind_port() call into bind_port_helper(), with
224 * Revision 1.68 2002/03/04 20:17:32 oes
227 * Revision 1.67 2002/03/04 18:18:57 oes
228 * - Removed _DEBUG mode
229 * - Cleand up cmdline parsing
230 * - Introduced --no-daemon, --pidfile options
231 * - Cleaned up signal handling:
232 * - Terminate cleanly on INT, TERM and ABRT
233 * - Schedule logfile for re-opening on HUP
234 * - Ignore CHLD and PIPE
235 * - Leave the rest with their default handlers
236 * - Uniform handler registration
237 * - Added usage() function
238 * - Played styleguide police
240 * Revision 1.66 2002/03/03 15:06:55 oes
241 * Re-enabled automatic config reloading
243 * Revision 1.65 2002/03/03 14:49:11 oes
244 * Fixed CLF logging: Now uses client's original HTTP request
246 * Revision 1.64 2002/03/03 09:18:03 joergs
247 * Made jumbjuster work on AmigaOS again.
249 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
250 * Clean up a little CRLF unpleasantness that suddenly appeared
252 * Revision 1.62 2002/02/20 23:17:23 jongfoster
253 * Detecting some out-of memory conditions and exiting with a log message.
255 * Revision 1.61 2002/01/17 21:01:52 jongfoster
256 * Moving all our URL and URL pattern parsing code to urlmatch.c.
258 * Revision 1.60 2001/12/30 14:07:32 steudten
259 * - Add signal handling (unix)
260 * - Add SIGHUP handler (unix)
261 * - Add creation of pidfile (unix)
262 * - Add action 'top' in rc file (RH)
263 * - Add entry 'SIGNALS' to manpage
264 * - Add exit message to logfile (unix)
266 * Revision 1.59 2001/12/13 14:07:18 oes
267 * Fixed Bug: 503 error page now sent OK
269 * Revision 1.58 2001/11/30 23:37:24 jongfoster
270 * Renaming the Win32 config file to config.txt - this is almost the
271 * same as the corresponding UNIX name "config"
273 * Revision 1.57 2001/11/16 00:47:43 jongfoster
274 * Changing the tty-disconnection code to use setsid().
276 * Revision 1.56 2001/11/13 20:20:54 jongfoster
277 * Tabs->spaces, fixing a bug with missing {} around an if()
279 * Revision 1.55 2001/11/13 20:14:53 jongfoster
280 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
282 * Revision 1.54 2001/11/07 00:03:14 steudten
283 * Give reliable return value if an error
284 * occurs not just 0 with new daemon mode.
286 * Revision 1.53 2001/11/05 21:41:43 steudten
287 * Add changes to be a real daemon just for unix os.
288 * (change cwd to /, detach from controlling tty, set
289 * process group and session leader to the own process.
291 * Add some fatal-error log message for failed malloc().
292 * Add '-d' if compiled with 'configure --with-debug' to
293 * enable debug output.
295 * Revision 1.52 2001/10/26 20:11:20 jongfoster
296 * Fixing type mismatch
298 * Revision 1.51 2001/10/26 17:38:28 oes
301 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
302 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
303 * threads to call select() simultaneously. So, it's time to do a real, live,
304 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
305 * (native). Both versions will work, but using __OS2__ offers multi-threading.
307 * Revision 1.49 2001/10/23 21:41:35 jongfoster
308 * Added call to initialize the (statically-allocated of course)
309 * "out of memory" CGI response.
311 * Revision 1.48 2001/10/10 19:56:46 jongfoster
312 * Moving some code that wasn't cookie-related out of an #ifdef
315 * Revision 1.47 2001/10/10 16:44:36 oes
316 * Added CONNECT destination port limitation check
318 * Revision 1.46 2001/10/08 15:17:41 oes
319 * Re-enabled SSL forwarding
321 * Revision 1.45 2001/10/07 15:42:11 oes
322 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
324 * Moved downgrading of the HTTP version from parse_http_request to
325 * chat(), since we can't decide if it is necessary before we have
326 * determined the actions for the URL. The HTTP command is now
327 * *always* re-built so the repairs need no longer be special-cased.
329 * filter_popups now gets a csp pointer so it can raise the new
330 * CSP_FLAG_MODIFIED flag.
334 * Added configurable size limit for the IOB. If the IOB grows so
335 * large that the next read would exceed the limit, the header
336 * is generated, and the header & unfiltered buffer are flushed
337 * to the client. Chat then continues in non-buffering,
338 * non-filtering body mode.
340 * Revision 1.44 2001/10/02 18:13:57 oes
343 * Revision 1.43 2001/10/02 15:32:13 oes
344 * Moved generation of hdr
346 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
347 * Cleaning up 2 compiler warnings on OS/2.
349 * Revision 1.41 2001/09/16 17:05:14 jongfoster
350 * Removing unused #include showarg.h
352 * Revision 1.40 2001/09/16 15:41:45 jongfoster
353 * Fixing signed/unsigned comparison warning.
355 * Revision 1.39 2001/09/16 13:21:27 jongfoster
356 * Changes to use new list functions.
358 * Revision 1.38 2001/09/16 13:01:46 jongfoster
359 * Removing redundant function call that zeroed zalloc()'d memory.
361 * Revision 1.37 2001/09/10 11:12:24 oes
362 * Deleted unused variable
364 * Revision 1.36 2001/09/10 10:56:15 oes
365 * Silenced compiler warnings
367 * Revision 1.35 2001/07/31 14:44:22 oes
368 * Deleted unused size parameter from filter_popups()
370 * Revision 1.34 2001/07/30 22:08:36 jongfoster
371 * Tidying up #defines:
372 * - All feature #defines are now of the form FEATURE_xxx
373 * - Permanently turned off WIN_GUI_EDIT
374 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
376 * Revision 1.33 2001/07/29 19:32:00 jongfoster
377 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
379 * Revision 1.32 2001/07/29 18:47:05 jongfoster
380 * Adding missing #include "loadcfg.h"
382 * Revision 1.31 2001/07/29 12:17:48 oes
383 * Applied pthread fix by Paul Lieverse
385 * Revision 1.30 2001/07/25 22:57:13 jongfoster
386 * __BEOS__ no longer overrides FEATURE_PTHREAD.
387 * This is because FEATURE_PTHREAD will soon be widely used, so I
388 * want to keep it simple.
390 * Revision 1.29 2001/07/24 12:47:06 oes
391 * Applied BeOS support update by Eugenia
393 * Revision 1.28 2001/07/23 13:26:12 oes
394 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
396 * Revision 1.27 2001/07/19 19:09:47 haroon
397 * - Added code to take care of the situation where while processing the first
398 * server response (which includes the server header), after finding the end
399 * of the headers we were not looking past the end of the headers for
400 * content modification. I enabled it for filter_popups.
401 * Someone else should look to see if other similar operations should be
402 * done to the discarded portion of the buffer.
404 * Note 2001/07/20: No, the other content modification mechanisms will process
405 * the whole iob later anyway. --oes
407 * Revision 1.26 2001/07/18 12:31:36 oes
410 * Revision 1.25 2001/07/15 19:43:49 jongfoster
411 * Supports POSIX threads.
412 * Also removed some unused #includes.
414 * Revision 1.24 2001/07/13 14:00:40 oes
415 * - Generic content modification scheme:
416 * Each feature has its own applicability flag that is set
417 * from csp->action->flags.
418 * Replaced the "filtering" int flag , by a function pointer
419 * "content_filter" to the function that will do the content
420 * modification. If it is != NULL, the document will be buffered
421 * and processed through *content_filter, which must set
422 * csp->content_length and return a modified copy of the body
423 * or return NULL (on failiure).
424 * - Changed csp->is_text to the more generic bitmap csp->content_type
425 * which can currently take the valued CT_TEXT or CT_GIF
427 * - Removed all #ifdef PCRS
429 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
430 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
431 * the `block_acl' call. This prevents a compilation error when the user
432 * does not wish to use the "ACL" feature.
434 * Revision 1.22 2001/06/29 21:45:41 oes
435 * Indentation, CRLF->LF, Tab-> Space
437 * Revision 1.21 2001/06/29 13:29:36 oes
438 * - Cleaned up, improved comments
439 * - Unified all possible interceptors (CGI,
440 * block, trust, fast_redirect) in one
441 * place, with one (CGI) answer generation
442 * mechansim. Much clearer now.
443 * - Removed the GIF image generation, which
444 * is now done in filters.c:block_url()
445 * - Made error conditions like domain lookup
446 * failiure or (various) problems while talking
447 * to the server use cgi.c:error_response()
448 * instead of generating HTML/HTTP in chat() (yuck!)
449 * - Removed logentry from cancelled commit
451 * Revision 1.20 2001/06/09 10:55:28 jongfoster
452 * Changing BUFSIZ ==> BUFFER_SIZE
454 * Revision 1.19 2001/06/07 23:12:52 jongfoster
455 * Replacing function pointer in struct gateway with a directly
456 * called function forwarded_connect().
457 * Replacing struct gateway with struct forward_spec
459 * Revision 1.18 2001/06/03 19:12:16 oes
460 * introduced new cgi handling
462 * Revision 1.17 2001/06/01 20:07:23 jongfoster
463 * Now uses action +image-blocker{} rather than config->tinygif
465 * Revision 1.16 2001/06/01 18:49:17 jongfoster
466 * Replaced "list_share" with "list" - the tiny memory gain was not
467 * worth the extra complexity.
469 * Revision 1.15 2001/05/31 21:24:47 jongfoster
470 * Changed "permission" to "action" throughout.
471 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
472 * Moved vanilla wafer check into chat(), since we must now
473 * decide whether or not to add it based on the URL.
475 * Revision 1.14 2001/05/29 20:14:01 joergs
476 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
479 * Revision 1.13 2001/05/29 09:50:24 jongfoster
480 * Unified blocklist/imagelist/permissionslist.
481 * File format is still under discussion, but the internal changes
484 * Also modified interceptor behaviour:
485 * - We now intercept all URLs beginning with one of the following
486 * prefixes (and *only* these prefixes):
488 * * http://ijbswa.sf.net/config/
489 * * http://ijbswa.sourceforge.net/config/
490 * - New interceptors "home page" - go to http://i.j.b/ to see it.
491 * - Internal changes so that intercepted and fast redirect pages
492 * are not replaced with an image.
493 * - Interceptors now have the option to send a binary page direct
494 * to the client. (i.e. ijb-send-banner uses this)
495 * - Implemented show-url-info interceptor. (Which is why I needed
496 * the above interceptors changes - a typical URL is
497 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
498 * The previous mechanism would not have intercepted that, and
499 * if it had been intercepted then it then it would have replaced
502 * Revision 1.12 2001/05/27 22:17:04 oes
504 * - re_process_buffer no longer writes the modified buffer
505 * to the client, which was very ugly. It now returns the
506 * buffer, which it is then written by chat.
508 * - content_length now adjusts the Content-Length: header
509 * for modified documents rather than crunch()ing it.
510 * (Length info in csp->content_length, which is 0 for
511 * unmodified documents)
513 * - For this to work, sed() is called twice when filtering.
515 * Revision 1.11 2001/05/26 17:27:53 jongfoster
516 * Added support for CLF and fixed LOG_LEVEL_LOG.
517 * Also did CRLF->LF fix of my previous patch.
519 * Revision 1.10 2001/05/26 15:26:15 jongfoster
520 * ACL feature now provides more security by immediately dropping
521 * connections from untrusted hosts.
523 * Revision 1.9 2001/05/26 00:28:36 jongfoster
524 * Automatic reloading of config file.
525 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
526 * Most of the global variables have been moved to a new
527 * struct configuration_spec, accessed through csp->config->globalname
528 * Most of the globals remaining are used by the Win32 GUI.
530 * Revision 1.8 2001/05/25 22:43:18 jongfoster
531 * Fixing minor memory leak and buffer overflow.
533 * Revision 1.7 2001/05/25 22:34:30 jongfoster
536 * Revision 1.6 2001/05/23 00:13:58 joergs
537 * AmigaOS support fixed.
539 * Revision 1.5 2001/05/22 18:46:04 oes
541 * - Enabled filtering banners by size rather than URL
542 * by adding patterns that replace all standard banner
543 * sizes with the "Junkbuster" gif to the re_filterfile
545 * - Enabled filtering WebBugs by providing a pattern
546 * which kills all 1x1 images
548 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
549 * which is selected by the (nonstandard and therefore
550 * capital) letter 'U' in the option string.
551 * It causes the quantifiers to be ungreedy by default.
552 * Appending a ? turns back to greedy (!).
554 * - Added a new interceptor ijb-send-banner, which
555 * sends back the "Junkbuster" gif. Without imagelist or
556 * MSIE detection support, or if tinygif = 1, or the
557 * URL isn't recognized as an imageurl, a lame HTML
558 * explanation is sent instead.
560 * - Added new feature, which permits blocking remote
561 * script redirects and firing back a local redirect
563 * The feature is conditionally compiled, i.e. it
564 * can be disabled with --disable-fast-redirects,
565 * plus it must be activated by a "fast-redirects"
566 * line in the config file, has its own log level
567 * and of course wants to be displayed by show-proxy-args
568 * Note: Boy, all the #ifdefs in 1001 locations and
569 * all the fumbling with configure.in and acconfig.h
570 * were *way* more work than the feature itself :-(
572 * - Because a generic redirect template was needed for
573 * this, tinygif = 3 now uses the same.
575 * - Moved GIFs, and other static HTTP response templates
580 * - Removed some >400 CRs again (Jon, you really worked
583 * Revision 1.4 2001/05/21 19:34:01 jongfoster
584 * Made failure to bind() a fatal error.
586 * Revision 1.3 2001/05/20 01:21:20 jongfoster
587 * Version 2.9.4 checkin.
588 * - Merged popupfile and cookiefile, and added control over PCRS
589 * filtering, in new "permissionsfile".
590 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
591 * file error you now get a message box (in the Win32 GUI) rather
592 * than the program exiting with no explanation.
593 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
595 * - Removed tabs from "config"
596 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
597 * - Bumped up version number.
599 * Revision 1.2 2001/05/17 22:34:44 oes
600 * - Added hint on GIF char array generation to jcc.c
601 * - Cleaned CRLF's from the sources and related files
602 * - Repaired logging for REF and FRC
604 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
605 * Initial import of version 2.9.3 source tree
608 *********************************************************************/
614 #include <sys/types.h>
621 #ifdef FEATURE_PTHREAD
623 #endif /* def FEATURE_PTHREAD */
626 # ifndef FEATURE_PTHREAD
630 # include <windows.h>
631 # include <process.h>
632 # endif /* ndef FEATURE_PTHREAD */
635 # ifndef _WIN_CONSOLE
637 # endif /* ndef _WIN_CONSOLE */
639 #else /* ifndef _WIN32 */
641 # if !defined (__OS2__)
643 # include <sys/wait.h>
644 # endif /* ndef __OS2__ */
645 # include <sys/time.h>
646 # include <sys/stat.h>
647 # include <sys/ioctl.h>
650 #include <sys/termios.h>
661 # include <socket.h> /* BeOS has select() for sockets only. */
662 # include <OS.h> /* declarations for threads and stuff. */
665 # if defined(__EMX__) || defined(__OS2__)
666 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
671 #define bzero(B,N) memset(B,0x00,n)
686 #include "killpopup.h"
687 #include "miscutil.h"
689 #include "jbsockets.h"
694 #include "urlmatch.h"
696 const char jcc_h_rcs[] = JCC_H_VERSION;
697 const char project_h_rcs[] = PROJECT_H_VERSION;
700 struct client_state clients[1];
701 struct file_list files[1];
703 #ifdef FEATURE_STATISTICS
704 int urls_read = 0; /* total nr of urls read inc rejected */
705 int urls_rejected = 0; /* total nr of urls rejected */
706 #endif /* def FEATURE_STATISTICS */
708 #ifdef FEATURE_GRACEFUL_TERMINATION
712 static void listen_loop(void);
713 static void chat(struct client_state *csp);
715 void serve(struct client_state *csp);
716 #else /* ifndef AMIGA */
717 static void serve(struct client_state *csp);
718 #endif /* def AMIGA */
721 static int32 server_thread(void *data);
722 #endif /* def __BEOS__ */
725 #define sleep(N) Sleep(((N) * 1000))
729 #define sleep(N) DosSleep(((N) * 100))
734 * Hit OSX over the head with a hammer. Protect all *_r functions.
736 pthread_mutex_t gmtime_mutex;
737 pthread_mutex_t localtime_mutex;
738 pthread_mutex_t gethostbyaddr_mutex;
739 pthread_mutex_t gethostbyname_mutex;
740 #endif /* def OSX_DARWIN */
742 #ifdef FEATURE_PTHREAD
743 pthread_mutex_t log_mutex;
744 pthread_mutex_t log_init_mutex;
745 #endif /* FEATURE_PTHREAD */
747 #if defined(unix) || defined(__EMX__)
748 const char *basedir = NULL;
749 const char *pidfile = NULL;
750 int received_hup_signal = 0;
751 #endif /* defined unix */
753 /* The vanilla wafer. */
754 static const char VANILLA_WAFER[] =
755 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
756 "Do_not_send_me_any_copyrighted_information_other_than_the_"
757 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
758 "In_particular_do_not_send_me_any_cookies_that_"
759 "are_subject_to_a_claim_of_copyright_by_anybody._"
760 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
761 "(copyright_or_otherwise)_applying_to_any_cookie._";
764 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
765 /*********************************************************************
767 * Function : sig_handler
769 * Description : Signal handler for different signals.
770 * Exit gracefully on ABRT, TERM and INT
771 * or set a flag that will cause the errlog
772 * to be reopened by the main thread on HUP.
775 * 1 : the_signal = the signal cause this function to call
779 *********************************************************************/
780 static void sig_handler(int the_signal)
787 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
795 received_hup_signal = 1;
800 * We shouldn't be here, unless we catch signals
801 * in main() that we can't handle here!
803 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
811 /*********************************************************************
815 * Description : Once a connection to the client has been accepted,
816 * this function is called (via serve()) to handle the
817 * main business of the communication. When this
818 * function returns, the caller must close the client
822 * 1 : csp = Current client state (buffers, headers, etc...)
824 * Returns : On success, the number of bytes written are returned (zero
825 * indicates nothing was written). On error, -1 is returned,
826 * and errno is set appropriately. If count is zero and the
827 * file descriptor refers to a regular file, 0 will be
828 * returned without causing any other effect. For a special
829 * file, the results are not portable.
831 *********************************************************************/
832 static void chat(struct client_state *csp)
835 * This next lines are a little ugly, but they simplifies the if statements
836 * below. Basically if TOGGLE, then we want the if to test if the
837 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
838 * then we want the if to test for CSP_FLAG_FORCED , else we don't
840 #ifdef FEATURE_TOGGLE
841 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
842 #else /* ifndef FEATURE_TOGGLE */
843 # define IS_TOGGLED_ON_AND
844 #endif /* ndef FEATURE_TOGGLE */
845 #ifdef FEATURE_FORCE_LOAD
846 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
847 #else /* ifndef FEATURE_FORCE_LOAD */
848 # define IS_NOT_FORCED_AND
849 #endif /* def FEATURE_FORCE_LOAD */
851 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
853 char buf[BUFFER_SIZE];
861 int ms_iis5_hack = 0;
863 const struct forward_spec * fwd;
864 struct http_request *http;
865 int len; /* for buffer sizes */
866 #ifdef FEATURE_KILL_POPUPS
867 int block_popups; /* bool, 1==will block popups */
868 int block_popups_now = 0; /* bool, 1==currently blocking popups */
869 #endif /* def FEATURE_KILL_POPUPS */
871 int pcrs_filter; /* bool, 1==will filter through pcrs */
872 int gif_deanimate; /* bool, 1==will deanimate gifs */
873 int jpeg_inspect; /* bool, 1==will inspect jpegs */
875 /* Function that does the content filtering for the current request */
876 char *(*content_filter)() = NULL;
878 /* Skeleton for HTTP response, if we should intercept the request */
879 struct http_response *rsp;
884 * Read the client's request. Note that since we're not using select() we
885 * could get blocked here if a client connected, then didn't say anything!
890 len = read_socket(csp->cfd, buf, sizeof(buf));
892 if (len <= 0) break; /* error! */
895 * If there is no memory left for buffering the
896 * request, there is nothing we can do but hang up
898 if (add_to_iob(csp, buf, len))
903 req = get_header(csp);
907 break; /* no HTTP request! */
912 continue; /* more to come! */
915 #ifdef FEATURE_FORCE_LOAD
916 /* If this request contains the FORCE_PREFIX,
917 * better get rid of it now and set the force flag --oes
920 if (strstr(req, FORCE_PREFIX))
922 strclean(req, FORCE_PREFIX);
923 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
924 csp->flags |= CSP_FLAG_FORCED;
927 #endif /* def FEATURE_FORCE_LOAD */
929 parse_http_request(req, http, csp);
934 if (http->cmd == NULL)
936 strcpy(buf, CHEADER);
937 write_socket(csp->cfd, buf, strlen(buf));
939 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
941 free_http_request(http);
945 /* decide how to route the HTTP request */
947 if ((fwd = forward_url(http, csp)) == NULL)
949 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
950 /* Never get here - LOG_LEVEL_FATAL causes program exit */
953 /* build the http request to send to the server
954 * we have to do one of the following:
956 * create = use the original HTTP request to create a new
957 * HTTP request that has either the path component
958 * without the http://domainspec (w/path) or the
959 * full orininal URL (w/url)
960 * Note that the path and/or the HTTP version may
961 * have been altered by now.
963 * connect = Open a socket to the host:port of the server
964 * and short-circuit server and client socket.
966 * pass = Pass the request unchanged if forwarding a CONNECT
967 * request to a parent proxy. Note that we'll be sending
968 * the CFAIL message ourselves if connecting to the parent
969 * fails, but we won't send a CSUCCEED message if it works,
970 * since that would result in a double message (ours and the
971 * parent's). After sending the request to the parent, we simply
977 * +--------+--------+
979 * 0 | create | connect|
981 * Forwarding +--------+--------+
983 * 1 | create | pass |
985 * +--------+--------+
990 * Determine the actions for this URL
992 #ifdef FEATURE_TOGGLE
993 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
995 /* Most compatible set of actions (i.e. none) */
996 init_current_action(csp->action);
999 #endif /* ndef FEATURE_TOGGLE */
1001 url_actions(http, csp);
1006 * Check if a CONNECT request is allowable:
1007 * In the absence of a +limit-connect action, allow only port 443.
1008 * If there is an action, allow whatever matches the specificaton.
1012 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
1013 || (csp->action->flags & ACTION_LIMIT_CONNECT
1014 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
1016 strcpy(buf, CFORBIDDEN);
1017 write_socket(csp->cfd, buf, strlen(buf));
1019 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
1020 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
1028 * Downgrade http version from 1.1 to 1.0 if +downgrade
1031 if ( (http->ssl == 0)
1032 && (!strcmpic(http->ver, "HTTP/1.1"))
1033 && (csp->action->flags & ACTION_DOWNGRADE))
1036 http->ver = strdup("HTTP/1.0");
1038 if (http->ver == NULL)
1040 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1045 * Save a copy of the original request for logging
1047 http->ocmd = strdup(http->cmd);
1049 if (http->ocmd == NULL)
1051 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
1055 * (Re)build the HTTP request for non-SSL requests.
1056 * If forwarding, use the whole URL, else, use only the path.
1062 http->cmd = strdup(http->gpc);
1063 string_append(&http->cmd, " ");
1065 if (fwd->forward_host)
1067 string_append(&http->cmd, http->url);
1071 string_append(&http->cmd, http->path);
1073 string_append(&http->cmd, " ");
1074 string_append(&http->cmd, http->ver);
1076 if (http->cmd == NULL)
1078 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1080 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", http->cmd);
1082 enlist(csp->headers, http->cmd);
1086 * If the user has not supplied any wafers, and the user has not
1087 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1089 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1090 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1092 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1096 #ifdef FEATURE_KILL_POPUPS
1097 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
1098 #endif /* def FEATURE_KILL_POPUPS */
1100 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
1101 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
1103 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
1105 jpeg_inspect = ((csp->action->flags & ACTION_JPEG_INSPECT) != 0);
1107 /* grab the rest of the client's headers */
1111 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1113 len = read_socket(csp->cfd, buf, sizeof(buf));
1116 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1121 * If there is no memory left for buffering the
1122 * request, there is nothing we can do but hang up
1124 if (add_to_iob(csp, buf, len))
1131 if (p == NULL) break;
1133 enlist(csp->headers, p);
1138 * We have a request. Now, check to see if we need to
1139 * intercept it, i.e. If ..
1143 /* We may not forward the request by rfc2616 sect 14.31 */
1144 (NULL != (rsp = direct_response(csp)))
1146 /* or a CGI call was detected and answered */
1147 || (NULL != (rsp = dispatch_cgi(csp)))
1149 /* or we are enabled and... */
1150 || (IS_ENABLED_AND (
1152 /* ..the request was blocked */
1153 ( NULL != (rsp = block_url(csp)))
1155 /* ..or untrusted */
1156 #ifdef FEATURE_TRUST
1157 || ( NULL != (rsp = trust_url(csp)))
1158 #endif /* def FEATURE_TRUST */
1160 /* ..or a fast redirect kicked in */
1161 #ifdef FEATURE_FAST_REDIRECTS
1162 || (((csp->action->flags & ACTION_FAST_REDIRECTS) != 0) &&
1163 (NULL != (rsp = redirect_url(csp))))
1164 #endif /* def FEATURE_FAST_REDIRECTS */
1168 /* Write the answer to the client */
1169 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1170 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1172 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1175 #ifdef FEATURE_STATISTICS
1176 /* Count as a rejected request */
1177 csp->flags |= CSP_FLAG_REJECTED;
1178 #endif /* def FEATURE_STATISTICS */
1180 /* Log (FIXME: All intercept reasons apprear as "crunch" with Status 200) */
1181 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
1182 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
1184 /* Clean up and return */
1185 free_http_response(rsp);
1189 hdr = sed(client_patterns, add_client_headers, csp);
1192 /* FIXME Should handle error properly */
1193 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1196 list_remove_all(csp->headers);
1198 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1200 if (fwd->forward_host)
1202 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1203 fwd->forward_host, fwd->forward_port, http->hostport);
1207 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1210 /* here we connect to the server, gateway, or the forwarder */
1212 csp->sfd = forwarded_connect(fwd, http, csp);
1214 if (csp->sfd == JB_INVALID_SOCKET)
1216 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1219 if (errno == EINVAL)
1221 rsp = error_response(csp, "no-such-domain", errno);
1223 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
1224 csp->ip_addr_str, http->ocmd);
1228 rsp = error_response(csp, "connect-failed", errno);
1230 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1231 csp->ip_addr_str, http->ocmd);
1235 /* Write the answer to the client */
1238 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1239 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1241 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1245 free_http_response(rsp);
1250 log_error(LOG_LEVEL_CONNECT, "OK");
1252 if (fwd->forward_host || (http->ssl == 0))
1254 /* write the client's (modified) header to the server
1255 * (along with anything else that may be in the buffer)
1258 if (write_socket(csp->sfd, hdr, strlen(hdr))
1259 || (flush_socket(csp->sfd, csp) < 0))
1261 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1264 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1265 csp->ip_addr_str, http->ocmd);
1267 rsp = error_response(csp, "connect-failed", errno);
1271 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1272 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1274 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1278 free_http_response(rsp);
1286 * We're running an SSL tunnel and we're not forwarding,
1287 * so just send the "connect succeeded" message to the
1288 * client, flush the rest, and get out of the way.
1290 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1291 csp->ip_addr_str, http->ocmd);
1293 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
1301 /* we're finished with the client's header */
1304 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1306 /* pass data between the client and server
1307 * until one or the other shuts down the connection.
1316 * FD_ZERO here seems to point to an errant macro which crashes.
1317 * So do this by hand for now...
1319 memset(&rfds,0x00,sizeof(fd_set));
1323 FD_SET(csp->cfd, &rfds);
1324 FD_SET(csp->sfd, &rfds);
1326 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
1330 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1334 /* this is the body of the browser's request
1335 * just read it and write it.
1338 if (FD_ISSET(csp->cfd, &rfds))
1340 len = read_socket(csp->cfd, buf, sizeof(buf));
1344 break; /* "game over, man" */
1347 if (write_socket(csp->sfd, buf, (size_t)len))
1349 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1356 * The server wants to talk. It could be the header or the body.
1357 * If `hdr' is null, then it's the header otherwise it's the body.
1358 * FIXME: Does `hdr' really mean `host'? No.
1362 if (FD_ISSET(csp->sfd, &rfds))
1365 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1369 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1371 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1372 csp->ip_addr_str, http->ocmd);
1374 rsp = error_response(csp, "connect-failed", errno);
1378 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1379 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1381 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1385 free_http_response(rsp);
1389 /* Add a trailing zero. This lets filter_popups
1390 * use string operations.
1394 #ifdef FEATURE_KILL_POPUPS
1395 /* Filter the popups on this read. */
1396 if (block_popups_now)
1398 filter_popups(buf, csp);
1400 #endif /* def FEATURE_KILL_POPUPS */
1402 /* Normally, this would indicate that we've read
1403 * as much as the server has sent us and we can
1404 * close the client connection. However, Microsoft
1405 * in its wisdom has released IIS/5 with a bug that
1406 * prevents it from sending the trailing \r\n in
1407 * a 302 redirect header (and possibly other headers).
1408 * To work around this if we've haven't parsed
1409 * a full header we'll append a trailing \r\n
1410 * and see if this now generates a valid one.
1412 * This hack shouldn't have any impacts. If we've
1413 * already transmitted the header or if this is a
1414 * SSL connection, then we won't bother with this
1415 * hack. So we only work on partially received
1416 * headers. If we append a \r\n and this still
1417 * doesn't generate a valid header, then we won't
1418 * transmit anything to the client.
1423 if (server_body || http->ssl)
1426 * If we have been buffering up the document,
1427 * now is the time to apply content modification
1428 * and send the result to the client.
1433 * If the content filter fails, use the original
1434 * buffer and length.
1435 * (see p != NULL ? p : csp->iob->cur below)
1437 if (NULL == (p = (*content_filter)(csp)))
1439 csp->content_length = csp->iob->eod - csp->iob->cur;
1442 hdr = sed(server_patterns, add_server_headers, csp);
1445 /* FIXME Should handle error properly */
1446 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1449 if (write_socket(csp->cfd, hdr, strlen(hdr))
1450 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
1452 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1462 break; /* "game over, man" */
1466 * This is NOT the body, so
1467 * Let's pretend the server just sent us a blank line.
1469 len = sprintf(buf, "\r\n");
1472 * Now, let the normal header parsing algorithm below do its
1473 * job. If it fails, we'll exit instead of continuing.
1480 * If this is an SSL connection or we're in the body
1481 * of the server document, just write it to the client,
1482 * unless we need to buffer the body for later content-filtering
1485 if (server_body || http->ssl)
1490 * If there is no memory left for buffering the content, or the buffer limit
1491 * has been reached, switch to non-filtering mode, i.e. make & write the
1492 * header, flush the iob and buf, and get out of the way.
1494 if (add_to_iob(csp, buf, len))
1499 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
1501 hdr = sed(server_patterns, add_server_headers, csp);
1505 * Memory is too tight to even generate the header.
1506 * Send our static "Out-of-memory" page.
1508 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
1509 rsp = cgi_error_memory();
1511 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1512 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1514 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1519 hdrlen = strlen(hdr);
1521 if (write_socket(csp->cfd, hdr, hdrlen)
1522 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
1523 || (write_socket(csp->cfd, buf, (size_t) len)))
1525 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
1531 byte_count += hdrlen + flushed + len;
1533 content_filter = NULL;
1540 if (write_socket(csp->cfd, buf, (size_t)len))
1542 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
1551 /* we're still looking for the end of the
1552 * server's header ... (does that make header
1553 * parsing an "out of body experience" ?
1557 * buffer up the data we just read. If that fails,
1558 * there's little we can do but send our static
1559 * out-of-memory page.
1561 if (add_to_iob(csp, buf, len))
1563 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
1564 rsp = cgi_error_memory();
1566 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1567 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1569 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1574 /* get header lines from the iob */
1576 while ((p = get_header(csp)) != NULL)
1580 /* see following note */
1583 enlist(csp->headers, p);
1587 /* NOTE: there are no "empty" headers so
1588 * if the pointer `p' is not NULL we must
1589 * assume that we reached the end of the
1590 * buffer before we hit the end of the header.
1597 /* Well, we tried our MS IIS/5
1598 * hack and it didn't work.
1599 * The header is incomplete
1600 * and there isn't anything
1601 * we can do about it.
1607 /* Since we have to wait for
1608 * more from the server before
1609 * we can parse the headers
1610 * we just continue here.
1616 /* we have now received the entire header.
1617 * filter it and send the result to the client
1620 hdr = sed(server_patterns, add_server_headers, csp);
1623 /* FIXME Should handle error properly */
1624 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1627 #ifdef FEATURE_KILL_POPUPS
1628 /* Start blocking popups if appropriate. */
1630 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1631 !http->ssl && /* We talk plaintext */
1632 block_popups) /* Policy allows */
1634 block_popups_now = 1;
1636 * Filter the part of the body that came in the same read
1637 * as the last headers:
1639 filter_popups(csp->iob->cur, csp);
1642 #endif /* def FEATURE_KILL_POPUPS */
1644 /* Buffer and pcrs filter this if appropriate. */
1646 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1647 !http->ssl && /* We talk plaintext */
1648 pcrs_filter) /* Policy allows */
1650 content_filter = pcrs_filter_response;
1653 /* Buffer and gif_deanimate this if appropriate. */
1655 if ((csp->content_type & CT_GIF) && /* It's an image/gif MIME-Type */
1656 !http->ssl && /* We talk plaintext */
1657 gif_deanimate) /* Policy allows */
1659 content_filter = gif_deanimate_response;
1662 /* Buffer and jpg_inspect this if appropriate. */
1664 if ((csp->content_type & CT_JPEG) && /* It's an image/jpeg MIME-Type */
1665 !http->ssl && /* We talk plaintext */
1666 jpeg_inspect) /* Policy allows */
1668 content_filter = jpeg_inspect_response;
1672 * Only write if we're not buffering for content modification
1674 if (!content_filter)
1676 /* write the server's (modified) header to
1677 * the client (along with anything else that
1678 * may be in the buffer)
1681 if (write_socket(csp->cfd, hdr, strlen(hdr))
1682 || ((len = flush_socket(csp->cfd, csp)) < 0))
1684 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1686 /* the write failed, so don't bother
1687 * mentioning it to the client...
1688 * it probably can't hear us anyway.
1697 /* we're finished with the server's header */
1702 /* If this was a MS IIS/5 hack then it means
1703 * the server has already closed the
1704 * connection. Nothing more to read. Time
1715 return; /* huh? we should never get here */
1718 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
1719 csp->ip_addr_str, http->ocmd, byte_count);
1723 /*********************************************************************
1727 * Description : This is little more than chat. We only "serve" to
1728 * to close any socket that chat may have opened.
1731 * 1 : csp = Current client state (buffers, headers, etc...)
1735 *********************************************************************/
1737 void serve(struct client_state *csp)
1738 #else /* ifndef AMIGA */
1739 static void serve(struct client_state *csp)
1740 #endif /* def AMIGA */
1743 close_socket(csp->cfd);
1745 if (csp->sfd != JB_INVALID_SOCKET)
1747 close_socket(csp->sfd);
1750 csp->flags &= ~CSP_FLAG_ACTIVE;
1756 /*********************************************************************
1758 * Function : server_thread
1760 * Description : We only exist to call `serve' in a threaded environment.
1763 * 1 : data = Current client state (buffers, headers, etc...)
1765 * Returns : Always 0.
1767 *********************************************************************/
1768 static int32 server_thread(void *data)
1770 serve((struct client_state *) data);
1777 /*********************************************************************
1781 * Description : Print usage info & exit.
1783 * Parameters : Pointer to argv[0] for identifying ourselves
1787 *********************************************************************/
1788 void usage(const char *myname)
1790 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
1792 "Usage: %s [--help] [--version] [configfile]\n"
1794 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
1796 "Aborting.\n", myname);
1803 /*********************************************************************
1807 * Description : Load the config file and start the listen loop.
1808 * This function is a lot more *sane* with the `load_config'
1809 * and `listen_loop' functions; although it stills does
1810 * a *little* too much for my taste.
1813 * 1 : argc = Number of parameters (including $0).
1814 * 2 : argv = Array of (char *)'s to the parameters.
1816 * Returns : 1 if : can't open config file, unrecognized directive,
1817 * stats requested in multi-thread mode, can't open the
1818 * log file, can't open the jar file, listen port is invalid,
1819 * any load fails, and can't bind port.
1821 * Else main never returns, the process must be signaled
1822 * to terminate execution. Or, on Windows, use the
1823 * "File", "Exit" menu option.
1825 *********************************************************************/
1827 int real_main(int argc, const char *argv[])
1829 int main(int argc, const char *argv[])
1834 struct passwd *pw = NULL;
1835 struct group *grp = NULL;
1844 #if !defined(_WIN32)
1852 * Parse the command line arguments
1854 while (++argc_pos < argc)
1856 if (strcmp(argv[argc_pos], "--help") == 0)
1861 else if(strcmp(argv[argc_pos], "--version") == 0)
1863 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
1869 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
1874 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
1876 if (++argc_pos == argc) usage(argv[0]);
1877 pidfile = strdup(argv[argc_pos]);
1880 else if (strcmp(argv[argc_pos], "--user" ) == 0)
1882 if (++argc_pos == argc) usage(argv[argc_pos]);
1884 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
1887 if (NULL == (grp = getgrnam(p)))
1889 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
1893 if (NULL == (pw = getpwnam(argv[argc_pos])))
1895 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
1898 if (p != NULL) *--p = '\0';
1901 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
1906 #endif /* defined(unix) */
1910 configfile = argv[argc_pos];
1913 } /* -END- while (more arguments) */
1916 if ( *configfile != '/' )
1918 char *abs_file, cwd[1024];
1920 /* make config-filename absolute here */
1921 if ( !(getcwd(cwd, sizeof(cwd))))
1923 perror("get working dir failed");
1927 if (!(basedir = strdup(cwd))
1928 || (!(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))))
1930 perror("malloc failed");
1933 strcpy( abs_file, basedir );
1934 strcat( abs_file, "/" );
1935 strcat( abs_file, configfile );
1936 configfile = abs_file;
1938 #endif /* defined unix */
1942 clients->next = NULL;
1946 #elif defined(_WIN32)
1952 * Prepare global mutex semaphores
1954 pthread_mutex_init(&gmtime_mutex,0);
1955 pthread_mutex_init(&localtime_mutex,0);
1956 pthread_mutex_init(&gethostbyaddr_mutex,0);
1957 pthread_mutex_init(&gethostbyname_mutex,0);
1958 #endif /* def OSX_DARWIN */
1960 #ifdef FEATURE_PTHREAD
1961 pthread_mutex_init(&log_mutex,0);
1962 pthread_mutex_init(&log_init_mutex,0);
1963 #endif /* FEATURE_PTHREAD */
1966 * Unix signal handling
1968 * Catch the abort, interrupt and terminate signals for a graceful exit
1969 * Catch the hangup signal so the errlog can be reopened.
1970 * Ignore the broken pipe signals (FIXME: Why?)
1972 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1975 const int catched_signals[] = { SIGABRT, SIGTERM, SIGINT, SIGHUP, 0 };
1976 const int ignored_signals[] = { SIGPIPE, 0 };
1978 for (idx = 0; catched_signals[idx] != 0; idx++)
1980 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
1982 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
1986 for (idx = 0; ignored_signals[idx] != 0; idx++)
1988 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
1990 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
1995 #else /* ifdef _WIN32 */
1996 # ifdef _WIN_CONSOLE
1998 * We *are* in a windows console app.
1999 * Print a verbose messages about FAQ's and such
2001 printf(win32_blurb);
2002 # endif /* def _WIN_CONSOLE */
2003 #endif /* def _WIN32 */
2006 /* Initialize the CGI subsystem */
2007 cgi_init_error_messages();
2010 * If runnig on unix and without the --nodaemon
2011 * option, become a daemon. I.e. fork, detach
2012 * from tty and get process group leadership
2025 if ( pid < 0 ) /* error */
2030 else if ( pid != 0 ) /* parent */
2035 * must check for errors
2036 * child died due to missing files aso
2039 wpid = waitpid( pid, &status, WNOHANG );
2048 /* Should be more portable, but not as well tested */
2053 #else /* ndef __FreeBSD__ */
2055 #endif /* ndef __FreeBSD__ */
2056 fd = open("/dev/tty", O_RDONLY);
2059 /* no error check here */
2060 ioctl( fd, TIOCNOTTY,0 );
2064 /* FIXME: should close stderr (fd 2) here too, but the test
2066 * and load config file is done in listen_loop() and puts
2067 * some messages on stderr there.
2074 } /* -END- if (!no_daemon) */
2077 * As soon as we have written the PID file, we can switch
2078 * to the user and group ID indicated by the --user option
2084 if (((NULL != grp) && setgid(grp->gr_gid)) || (setgid(pw->pw_gid)))
2086 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
2092 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
2094 if (chroot(pw->pw_dir) < 0)
2096 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
2100 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
2103 if (setuid(pw->pw_uid))
2105 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
2109 char putenv_dummy[64];
2111 strcpy(putenv_dummy, "HOME=/");
2112 if (putenv(putenv_dummy) != 0)
2114 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
2117 snprintf(putenv_dummy, 64, "USER=%s", pw->pw_name);
2118 if (putenv(putenv_dummy) != 0)
2120 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
2126 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
2129 #endif /* defined unix */
2139 /*********************************************************************
2141 * Function : bind_port_helper
2143 * Description : Bind the listen port. Handles logging, and aborts
2147 * 1 : config = Privoxy configuration. Specifies port
2150 * Returns : Port that was opened.
2152 *********************************************************************/
2153 static jb_socket bind_port_helper(struct configuration_spec * config)
2158 if ( (config->haddr != NULL)
2159 && (config->haddr[0] == '1')
2160 && (config->haddr[1] == '2')
2161 && (config->haddr[2] == '7')
2162 && (config->haddr[3] == '.') )
2164 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
2167 else if (config->haddr == NULL)
2169 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
2174 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
2175 config->hport, config->haddr);
2178 result = bind_port(config->haddr, config->hport, &bfd);
2185 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2186 "There may be another Privoxy or some other "
2187 "proxy running on port %d",
2188 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
2189 config->hport, config->hport);
2192 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2193 "The hostname is not resolvable",
2194 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2197 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
2198 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2201 /* shouldn't get here */
2202 return JB_INVALID_SOCKET;
2205 config->need_bind = 0;
2211 /*********************************************************************
2213 * Function : listen_loop
2215 * Description : bind the listen port and enter a "FOREVER" listening loop.
2221 *********************************************************************/
2222 static void listen_loop(void)
2224 struct client_state *csp = NULL;
2226 struct configuration_spec * config;
2228 config = load_config();
2230 bfd = bind_port_helper(config);
2232 #ifdef FEATURE_GRACEFUL_TERMINATION
2233 while (!g_terminate)
2238 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
2239 while (waitpid(-1, NULL, WNOHANG) > 0)
2241 /* zombie children */
2243 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
2246 * Free data that was used by died threads
2252 * Re-open the errlog after HUP signal
2254 if (received_hup_signal)
2256 init_error_log(Argv[0], config->logfile, config->debug);
2257 received_hup_signal = 0;
2262 #ifdef FEATURE_COOKIE_JAR
2264 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
2265 * already open. I think unload_configfile() is not being run, which should do
2266 * this work. Until that can get resolved, we'll use this workaround.
2270 if (csp->config->jar)
2272 fclose(csp->config->jar);
2273 csp->config->jar = NULL;
2275 #endif /* FEATURE_COOKIE_JAR */
2276 #endif /* __OS2__ */
2278 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
2280 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
2284 csp->flags |= CSP_FLAG_ACTIVE;
2285 csp->sfd = JB_INVALID_SOCKET;
2287 csp->config = config = load_config();
2289 if ( config->need_bind )
2292 * Since we were listening to the "old port", we will not see
2293 * a "listen" param change until the next IJB request. So, at
2294 * least 1 more request must be made for us to find the new
2295 * setting. I am simply closing the old socket and binding the
2298 * Which-ever is correct, we will serve 1 more page via the
2299 * old settings. This should probably be a "show-proxy-args"
2300 * request. This should not be a so common of an operation
2301 * that this will hurt people's feelings.
2306 bfd = bind_port_helper(config);
2309 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
2311 if (!accept_connection(csp, bfd))
2313 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
2326 log_error(LOG_LEVEL_CONNECT, "OK");
2329 #ifdef FEATURE_TOGGLE
2330 if (global_toggle_state)
2332 csp->flags |= CSP_FLAG_TOGGLED_ON;
2334 #endif /* def FEATURE_TOGGLE */
2336 if (run_loader(csp))
2338 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
2339 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2343 if (block_acl(NULL,csp))
2345 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
2346 close_socket(csp->cfd);
2350 #endif /* def FEATURE_ACL */
2352 /* add it to the list of clients */
2353 csp->next = clients->next;
2354 clients->next = csp;
2356 if (config->multi_threaded)
2360 /* this is a switch () statment in the C preprocessor - ugh */
2361 #undef SELECTED_ONE_OPTION
2363 /* Use Pthreads in preference to native code */
2364 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
2365 #define SELECTED_ONE_OPTION
2367 pthread_t the_thread;
2368 pthread_attr_t attrs;
2370 pthread_attr_init(&attrs);
2371 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
2372 errno = pthread_create(&the_thread, &attrs,
2374 child_id = errno ? -1 : 0;
2375 pthread_attr_destroy(&attrs);
2379 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
2380 #define SELECTED_ONE_OPTION
2381 child_id = _beginthread(
2382 (void (*)(void *))serve,
2387 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
2388 #define SELECTED_ONE_OPTION
2389 child_id = _beginthread(
2390 (void(* _Optlink)(void*))serve,
2396 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
2397 #define SELECTED_ONE_OPTION
2399 thread_id tid = spawn_thread
2400 (server_thread, "server", B_NORMAL_PRIORITY, csp);
2402 if ((tid >= 0) && (resume_thread(tid) == B_OK))
2404 child_id = (int) tid;
2413 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2414 #define SELECTED_ONE_OPTION
2415 csp->cfd = ReleaseSocket(csp->cfd, -1);
2417 if((child_id = (int)CreateNewProcTags(
2418 NP_Entry, (ULONG)server_thread,
2419 NP_Output, Output(),
2420 NP_CloseOutput, FALSE,
2421 NP_Name, (ULONG)"privoxy child",
2422 NP_StackSize, 200*1024,
2426 ((struct Task *)child_id)->tc_UserData = csp;
2427 Signal((struct Task *)child_id, SIGF_SINGLE);
2432 #if !defined(SELECTED_ONE_OPTION)
2435 /* This block is only needed when using fork().
2436 * When using threads, the server thread was
2437 * created and run by the call to _beginthread().
2439 if (child_id == 0) /* child */
2442 #ifdef FEATURE_TOGGLE
2443 int inherited_toggle_state = global_toggle_state;
2444 #endif /* def FEATURE_TOGGLE */
2449 * If we've been toggled or we've blocked the request, tell Mom
2452 #ifdef FEATURE_TOGGLE
2453 if (inherited_toggle_state != global_toggle_state)
2455 rc |= RC_FLAG_TOGGLED;
2457 #endif /* def FEATURE_TOGGLE */
2459 #ifdef FEATURE_STATISTICS
2460 if (csp->flags & CSP_FLAG_REJECTED)
2462 rc |= RC_FLAG_BLOCKED;
2464 #endif /* ndef FEATURE_STATISTICS */
2468 else if (child_id > 0) /* parent */
2470 /* in a fork()'d environment, the parent's
2471 * copy of the client socket and the CSP
2475 #if !defined(_WIN32) && !defined(__CYGWIN__)
2477 wait( &child_status );
2480 * Evaluate child's return code: If the child has
2481 * - been toggled, toggle ourselves
2482 * - blocked its request, bump up the stats counter
2485 #ifdef FEATURE_TOGGLE
2486 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
2488 global_toggle_state = !global_toggle_state;
2490 #endif /* def FEATURE_TOGGLE */
2492 #ifdef FEATURE_STATISTICS
2494 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
2498 #endif /* def FEATURE_STATISTICS */
2500 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
2501 close_socket(csp->cfd);
2502 csp->flags &= ~CSP_FLAG_ACTIVE;
2506 #undef SELECTED_ONE_OPTION
2507 /* end of cpp switch () */
2509 if (child_id < 0) /* failed */
2511 char buf[BUFFER_SIZE];
2513 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
2515 sprintf(buf , "Privoxy: can't fork: errno = %d", errno);
2517 write_socket(csp->cfd, buf, strlen(buf));
2518 close_socket(csp->cfd);
2519 csp->flags &= ~CSP_FLAG_ACTIVE;
2530 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
2532 /* Clean up. Aim: free all memory (no leaks) */
2533 #ifdef FEATURE_GRACEFUL_TERMINATION
2535 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
2537 unload_current_config_file();
2538 unload_current_actions_file();
2539 unload_current_re_filterfile();
2540 #ifdef FEATURE_TRUST
2541 unload_current_trust_file();
2544 if (config->multi_threaded)
2551 } while ((clients->next != NULL) && (--i > 0));
2555 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
2566 #ifdef FEATURE_COOKIE_JAR
2567 if (NULL != config->jar)
2569 fclose(config->jar);
2573 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
2574 /* Cleanup - remove taskbar icon etc. */
2579 #endif /* FEATURE_GRACEFUL_TERMINATION */