1 const char jcc_rcs[] = "$Id: jcc.c,v 1.92.2.11 2003/05/14 12:32:02 oes 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 1.92.2.11 2003/05/14 12:32:02 oes
37 * Close jarfile on graceful exit, remove stray line
39 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
40 * Cosmetics: Killed a warning, a typo and an allocation left at exit
42 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
43 * No longer rely on non-POSIX.1 extensions of getcwd().
46 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
47 * Replaced setenv() by posix-compliant putenv()
48 * Thanks to Neil McCalden (nmcc AT users.sf.net).
50 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
51 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
53 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
54 * Clean-up and extension of improvements for forked mode:
55 * - Child's return code now consists of flags RC_FLAG_*
56 * - Reporting toggle to parent now properly #ifdef'ed
57 * - Children now report blocking to parent. This enables
58 * statistics in forked mode
60 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
61 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
62 * Children now report having been toggled through _exit(17), parents
63 * watch for that code and toggle themselves if found.
65 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
66 * Wrapping all *_r functions (the non-_r versions of them) with mutex semaphores for OSX. Hopefully this will take care of all of those pesky crash reports.
68 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
69 * Fixed two mostly harmless mem leaks
71 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
72 * Fix: Head of global clients list now initialized to NULL
74 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
75 * Added basic support for OPTIONS and TRACE HTTP methods:
76 * - New interceptor direct_response() added in chat().
77 * - sed() moved to earlier in the process, so that the
78 * Host: header is evaluated before actions and forwarding
81 * Revision 1.92 2002/05/08 16:00:46 oes
82 * Chat's buffer handling:
83 * - Fixed bug with unchecked out-of-mem conditions
84 * while reading client request & server headers
85 * - No longer predict if the buffer limit will be exceeded
86 * in the next read -- check add_to_iob's new
87 * return code. If buffer couldn't be extended
88 * (policy or out-of-mem) while
89 * - reading from client: abort
90 * - reading server headers: send error page
91 * - buffering server body for filter: flush,
92 * and if that fails: send error page
94 * Revision 1.91 2002/04/08 20:35:58 swa
97 * Revision 1.90 2002/04/02 14:57:28 oes
98 * Made sending wafers independent of FEATURE_COOKIE_JAR
100 * Revision 1.89 2002/03/31 17:18:59 jongfoster
101 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
103 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
104 * More compiler warning message maintenance
106 * Revision 1.87 2002/03/26 22:29:54 swa
107 * we have a new homepage!
109 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
110 * Workaround for closing the jarfile before load_config() comes around again
112 * Revision 1.85 2002/03/24 15:23:33 jongfoster
115 * Revision 1.84 2002/03/24 13:25:43 swa
116 * name change related issues
118 * Revision 1.83 2002/03/16 23:54:06 jongfoster
119 * Adding graceful termination feature, to help look for memory leaks.
120 * If you enable this (which, by design, has to be done by hand
121 * editing config.h) and then go to http://i.j.b/die, then the program
122 * will exit cleanly after the *next* request. It should free all the
123 * memory that was used.
125 * Revision 1.82 2002/03/13 00:27:05 jongfoster
128 * Revision 1.81 2002/03/12 01:42:50 oes
129 * Introduced modular filters
131 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
132 * OS/2 port maintenance:
133 * - Fixed EMX build - it had decayed a little
134 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
135 * substituted a memset for now.
137 * Revision 1.79 2002/03/09 20:03:52 jongfoster
138 * - Making various functions return int rather than size_t.
139 * (Undoing a recent change). Since size_t is unsigned on
140 * Windows, functions like read_socket that return -1 on
141 * error cannot return a size_t.
143 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
144 * crashes, and also frequently caused JB to jump to 100%
145 * CPU and stay there. (Because it thought it had just
146 * read ((unsigned)-1) == 4Gb of data...)
148 * - The signature of write_socket has changed, it now simply
149 * returns success=0/failure=nonzero.
151 * - Trying to get rid of a few warnings --with-debug on
152 * Windows, I've introduced a new type "jb_socket". This is
153 * used for the socket file descriptors. On Windows, this
154 * is SOCKET (a typedef for unsigned). Everywhere else, it's
155 * an int. The error value can't be -1 any more, so it's
156 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
157 * Windows it maps to the #define INVALID_SOCKET.)
159 * - The signature of bind_port has changed.
161 * Revision 1.78 2002/03/08 21:35:04 oes
162 * Added optional group supplement to --user option. Will now use default group of user if no group given
164 * Revision 1.77 2002/03/07 03:52:06 oes
165 * - Fixed compiler warnings etc
166 * - Improved handling of failed DNS lookups
168 * Revision 1.76 2002/03/06 22:54:35 jongfoster
169 * Automated function-comment nitpicking.
171 * Revision 1.75 2002/03/06 10:02:19 oes
172 * Fixed stupid bug when --user was not given
174 * Revision 1.74 2002/03/06 00:49:31 jongfoster
175 * Fixing warning on Windows
176 * Making #ifdefs that refer to the same variable consistently
177 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
179 * Revision 1.73 2002/03/05 23:57:30 hal9
180 * Stray character 's' on line 1618 was breaking build.
182 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
183 * - Re-enable OS/2 building after new parms were added
184 * - Fix false out of memory report when resolving CGI templates when no IP
185 * address is available of failed attempt (a la no such domain)
187 * Revision 1.71 2002/03/05 18:13:56 oes
188 * Added --user option
190 * Revision 1.70 2002/03/05 04:52:42 oes
191 * Deleted non-errlog debugging code
193 * Revision 1.69 2002/03/04 23:50:00 jongfoster
194 * Splitting off bind_port() call into bind_port_helper(), with
197 * Revision 1.68 2002/03/04 20:17:32 oes
200 * Revision 1.67 2002/03/04 18:18:57 oes
201 * - Removed _DEBUG mode
202 * - Cleand up cmdline parsing
203 * - Introduced --no-daemon, --pidfile options
204 * - Cleaned up signal handling:
205 * - Terminate cleanly on INT, TERM and ABRT
206 * - Schedule logfile for re-opening on HUP
207 * - Ignore CHLD and PIPE
208 * - Leave the rest with their default handlers
209 * - Uniform handler registration
210 * - Added usage() function
211 * - Played styleguide police
213 * Revision 1.66 2002/03/03 15:06:55 oes
214 * Re-enabled automatic config reloading
216 * Revision 1.65 2002/03/03 14:49:11 oes
217 * Fixed CLF logging: Now uses client's original HTTP request
219 * Revision 1.64 2002/03/03 09:18:03 joergs
220 * Made jumbjuster work on AmigaOS again.
222 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
223 * Clean up a little CRLF unpleasantness that suddenly appeared
225 * Revision 1.62 2002/02/20 23:17:23 jongfoster
226 * Detecting some out-of memory conditions and exiting with a log message.
228 * Revision 1.61 2002/01/17 21:01:52 jongfoster
229 * Moving all our URL and URL pattern parsing code to urlmatch.c.
231 * Revision 1.60 2001/12/30 14:07:32 steudten
232 * - Add signal handling (unix)
233 * - Add SIGHUP handler (unix)
234 * - Add creation of pidfile (unix)
235 * - Add action 'top' in rc file (RH)
236 * - Add entry 'SIGNALS' to manpage
237 * - Add exit message to logfile (unix)
239 * Revision 1.59 2001/12/13 14:07:18 oes
240 * Fixed Bug: 503 error page now sent OK
242 * Revision 1.58 2001/11/30 23:37:24 jongfoster
243 * Renaming the Win32 config file to config.txt - this is almost the
244 * same as the corresponding UNIX name "config"
246 * Revision 1.57 2001/11/16 00:47:43 jongfoster
247 * Changing the tty-disconnection code to use setsid().
249 * Revision 1.56 2001/11/13 20:20:54 jongfoster
250 * Tabs->spaces, fixing a bug with missing {} around an if()
252 * Revision 1.55 2001/11/13 20:14:53 jongfoster
253 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
255 * Revision 1.54 2001/11/07 00:03:14 steudten
256 * Give reliable return value if an error
257 * occurs not just 0 with new daemon mode.
259 * Revision 1.53 2001/11/05 21:41:43 steudten
260 * Add changes to be a real daemon just for unix os.
261 * (change cwd to /, detach from controlling tty, set
262 * process group and session leader to the own process.
264 * Add some fatal-error log message for failed malloc().
265 * Add '-d' if compiled with 'configure --with-debug' to
266 * enable debug output.
268 * Revision 1.52 2001/10/26 20:11:20 jongfoster
269 * Fixing type mismatch
271 * Revision 1.51 2001/10/26 17:38:28 oes
274 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
275 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
276 * threads to call select() simultaneously. So, it's time to do a real, live,
277 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
278 * (native). Both versions will work, but using __OS2__ offers multi-threading.
280 * Revision 1.49 2001/10/23 21:41:35 jongfoster
281 * Added call to initialize the (statically-allocated of course)
282 * "out of memory" CGI response.
284 * Revision 1.48 2001/10/10 19:56:46 jongfoster
285 * Moving some code that wasn't cookie-related out of an #ifdef
288 * Revision 1.47 2001/10/10 16:44:36 oes
289 * Added CONNECT destination port limitation check
291 * Revision 1.46 2001/10/08 15:17:41 oes
292 * Re-enabled SSL forwarding
294 * Revision 1.45 2001/10/07 15:42:11 oes
295 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
297 * Moved downgrading of the HTTP version from parse_http_request to
298 * chat(), since we can't decide if it is necessary before we have
299 * determined the actions for the URL. The HTTP command is now
300 * *always* re-built so the repairs need no longer be special-cased.
302 * filter_popups now gets a csp pointer so it can raise the new
303 * CSP_FLAG_MODIFIED flag.
307 * Added configurable size limit for the IOB. If the IOB grows so
308 * large that the next read would exceed the limit, the header
309 * is generated, and the header & unfiltered buffer are flushed
310 * to the client. Chat then continues in non-buffering,
311 * non-filtering body mode.
313 * Revision 1.44 2001/10/02 18:13:57 oes
316 * Revision 1.43 2001/10/02 15:32:13 oes
317 * Moved generation of hdr
319 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
320 * Cleaning up 2 compiler warnings on OS/2.
322 * Revision 1.41 2001/09/16 17:05:14 jongfoster
323 * Removing unused #include showarg.h
325 * Revision 1.40 2001/09/16 15:41:45 jongfoster
326 * Fixing signed/unsigned comparison warning.
328 * Revision 1.39 2001/09/16 13:21:27 jongfoster
329 * Changes to use new list functions.
331 * Revision 1.38 2001/09/16 13:01:46 jongfoster
332 * Removing redundant function call that zeroed zalloc()'d memory.
334 * Revision 1.37 2001/09/10 11:12:24 oes
335 * Deleted unused variable
337 * Revision 1.36 2001/09/10 10:56:15 oes
338 * Silenced compiler warnings
340 * Revision 1.35 2001/07/31 14:44:22 oes
341 * Deleted unused size parameter from filter_popups()
343 * Revision 1.34 2001/07/30 22:08:36 jongfoster
344 * Tidying up #defines:
345 * - All feature #defines are now of the form FEATURE_xxx
346 * - Permanently turned off WIN_GUI_EDIT
347 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
349 * Revision 1.33 2001/07/29 19:32:00 jongfoster
350 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
352 * Revision 1.32 2001/07/29 18:47:05 jongfoster
353 * Adding missing #include "loadcfg.h"
355 * Revision 1.31 2001/07/29 12:17:48 oes
356 * Applied pthread fix by Paul Lieverse
358 * Revision 1.30 2001/07/25 22:57:13 jongfoster
359 * __BEOS__ no longer overrides FEATURE_PTHREAD.
360 * This is because FEATURE_PTHREAD will soon be widely used, so I
361 * want to keep it simple.
363 * Revision 1.29 2001/07/24 12:47:06 oes
364 * Applied BeOS support update by Eugenia
366 * Revision 1.28 2001/07/23 13:26:12 oes
367 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
369 * Revision 1.27 2001/07/19 19:09:47 haroon
370 * - Added code to take care of the situation where while processing the first
371 * server response (which includes the server header), after finding the end
372 * of the headers we were not looking past the end of the headers for
373 * content modification. I enabled it for filter_popups.
374 * Someone else should look to see if other similar operations should be
375 * done to the discarded portion of the buffer.
377 * Note 2001/07/20: No, the other content modification mechanisms will process
378 * the whole iob later anyway. --oes
380 * Revision 1.26 2001/07/18 12:31:36 oes
383 * Revision 1.25 2001/07/15 19:43:49 jongfoster
384 * Supports POSIX threads.
385 * Also removed some unused #includes.
387 * Revision 1.24 2001/07/13 14:00:40 oes
388 * - Generic content modification scheme:
389 * Each feature has its own applicability flag that is set
390 * from csp->action->flags.
391 * Replaced the "filtering" int flag , by a function pointer
392 * "content_filter" to the function that will do the content
393 * modification. If it is != NULL, the document will be buffered
394 * and processed through *content_filter, which must set
395 * csp->content_length and return a modified copy of the body
396 * or return NULL (on failiure).
397 * - Changed csp->is_text to the more generic bitmap csp->content_type
398 * which can currently take the valued CT_TEXT or CT_GIF
400 * - Removed all #ifdef PCRS
402 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
403 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
404 * the `block_acl' call. This prevents a compilation error when the user
405 * does not wish to use the "ACL" feature.
407 * Revision 1.22 2001/06/29 21:45:41 oes
408 * Indentation, CRLF->LF, Tab-> Space
410 * Revision 1.21 2001/06/29 13:29:36 oes
411 * - Cleaned up, improved comments
412 * - Unified all possible interceptors (CGI,
413 * block, trust, fast_redirect) in one
414 * place, with one (CGI) answer generation
415 * mechansim. Much clearer now.
416 * - Removed the GIF image generation, which
417 * is now done in filters.c:block_url()
418 * - Made error conditions like domain lookup
419 * failiure or (various) problems while talking
420 * to the server use cgi.c:error_response()
421 * instead of generating HTML/HTTP in chat() (yuck!)
422 * - Removed logentry from cancelled commit
424 * Revision 1.20 2001/06/09 10:55:28 jongfoster
425 * Changing BUFSIZ ==> BUFFER_SIZE
427 * Revision 1.19 2001/06/07 23:12:52 jongfoster
428 * Replacing function pointer in struct gateway with a directly
429 * called function forwarded_connect().
430 * Replacing struct gateway with struct forward_spec
432 * Revision 1.18 2001/06/03 19:12:16 oes
433 * introduced new cgi handling
435 * Revision 1.17 2001/06/01 20:07:23 jongfoster
436 * Now uses action +image-blocker{} rather than config->tinygif
438 * Revision 1.16 2001/06/01 18:49:17 jongfoster
439 * Replaced "list_share" with "list" - the tiny memory gain was not
440 * worth the extra complexity.
442 * Revision 1.15 2001/05/31 21:24:47 jongfoster
443 * Changed "permission" to "action" throughout.
444 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
445 * Moved vanilla wafer check into chat(), since we must now
446 * decide whether or not to add it based on the URL.
448 * Revision 1.14 2001/05/29 20:14:01 joergs
449 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
452 * Revision 1.13 2001/05/29 09:50:24 jongfoster
453 * Unified blocklist/imagelist/permissionslist.
454 * File format is still under discussion, but the internal changes
457 * Also modified interceptor behaviour:
458 * - We now intercept all URLs beginning with one of the following
459 * prefixes (and *only* these prefixes):
461 * * http://ijbswa.sf.net/config/
462 * * http://ijbswa.sourceforge.net/config/
463 * - New interceptors "home page" - go to http://i.j.b/ to see it.
464 * - Internal changes so that intercepted and fast redirect pages
465 * are not replaced with an image.
466 * - Interceptors now have the option to send a binary page direct
467 * to the client. (i.e. ijb-send-banner uses this)
468 * - Implemented show-url-info interceptor. (Which is why I needed
469 * the above interceptors changes - a typical URL is
470 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
471 * The previous mechanism would not have intercepted that, and
472 * if it had been intercepted then it then it would have replaced
475 * Revision 1.12 2001/05/27 22:17:04 oes
477 * - re_process_buffer no longer writes the modified buffer
478 * to the client, which was very ugly. It now returns the
479 * buffer, which it is then written by chat.
481 * - content_length now adjusts the Content-Length: header
482 * for modified documents rather than crunch()ing it.
483 * (Length info in csp->content_length, which is 0 for
484 * unmodified documents)
486 * - For this to work, sed() is called twice when filtering.
488 * Revision 1.11 2001/05/26 17:27:53 jongfoster
489 * Added support for CLF and fixed LOG_LEVEL_LOG.
490 * Also did CRLF->LF fix of my previous patch.
492 * Revision 1.10 2001/05/26 15:26:15 jongfoster
493 * ACL feature now provides more security by immediately dropping
494 * connections from untrusted hosts.
496 * Revision 1.9 2001/05/26 00:28:36 jongfoster
497 * Automatic reloading of config file.
498 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
499 * Most of the global variables have been moved to a new
500 * struct configuration_spec, accessed through csp->config->globalname
501 * Most of the globals remaining are used by the Win32 GUI.
503 * Revision 1.8 2001/05/25 22:43:18 jongfoster
504 * Fixing minor memory leak and buffer overflow.
506 * Revision 1.7 2001/05/25 22:34:30 jongfoster
509 * Revision 1.6 2001/05/23 00:13:58 joergs
510 * AmigaOS support fixed.
512 * Revision 1.5 2001/05/22 18:46:04 oes
514 * - Enabled filtering banners by size rather than URL
515 * by adding patterns that replace all standard banner
516 * sizes with the "Junkbuster" gif to the re_filterfile
518 * - Enabled filtering WebBugs by providing a pattern
519 * which kills all 1x1 images
521 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
522 * which is selected by the (nonstandard and therefore
523 * capital) letter 'U' in the option string.
524 * It causes the quantifiers to be ungreedy by default.
525 * Appending a ? turns back to greedy (!).
527 * - Added a new interceptor ijb-send-banner, which
528 * sends back the "Junkbuster" gif. Without imagelist or
529 * MSIE detection support, or if tinygif = 1, or the
530 * URL isn't recognized as an imageurl, a lame HTML
531 * explanation is sent instead.
533 * - Added new feature, which permits blocking remote
534 * script redirects and firing back a local redirect
536 * The feature is conditionally compiled, i.e. it
537 * can be disabled with --disable-fast-redirects,
538 * plus it must be activated by a "fast-redirects"
539 * line in the config file, has its own log level
540 * and of course wants to be displayed by show-proxy-args
541 * Note: Boy, all the #ifdefs in 1001 locations and
542 * all the fumbling with configure.in and acconfig.h
543 * were *way* more work than the feature itself :-(
545 * - Because a generic redirect template was needed for
546 * this, tinygif = 3 now uses the same.
548 * - Moved GIFs, and other static HTTP response templates
553 * - Removed some >400 CRs again (Jon, you really worked
556 * Revision 1.4 2001/05/21 19:34:01 jongfoster
557 * Made failure to bind() a fatal error.
559 * Revision 1.3 2001/05/20 01:21:20 jongfoster
560 * Version 2.9.4 checkin.
561 * - Merged popupfile and cookiefile, and added control over PCRS
562 * filtering, in new "permissionsfile".
563 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
564 * file error you now get a message box (in the Win32 GUI) rather
565 * than the program exiting with no explanation.
566 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
568 * - Removed tabs from "config"
569 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
570 * - Bumped up version number.
572 * Revision 1.2 2001/05/17 22:34:44 oes
573 * - Added hint on GIF char array generation to jcc.c
574 * - Cleaned CRLF's from the sources and related files
575 * - Repaired logging for REF and FRC
577 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
578 * Initial import of version 2.9.3 source tree
581 *********************************************************************/
587 #include <sys/types.h>
594 #ifdef FEATURE_PTHREAD
596 #endif /* def FEATURE_PTHREAD */
599 # ifndef FEATURE_PTHREAD
603 # include <windows.h>
604 # include <process.h>
605 # endif /* ndef FEATURE_PTHREAD */
608 # ifndef _WIN_CONSOLE
610 # endif /* ndef _WIN_CONSOLE */
612 #else /* ifndef _WIN32 */
614 # if !defined (__OS2__)
616 # include <sys/wait.h>
617 # endif /* ndef __OS2__ */
618 # include <sys/time.h>
619 # include <sys/stat.h>
620 # include <sys/ioctl.h>
623 #include <sys/termios.h>
634 # include <socket.h> /* BeOS has select() for sockets only. */
635 # include <OS.h> /* declarations for threads and stuff. */
638 # if defined(__EMX__) || defined(__OS2__)
639 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
644 #define bzero(B,N) memset(B,0x00,n)
659 #include "killpopup.h"
660 #include "miscutil.h"
662 #include "jbsockets.h"
667 #include "urlmatch.h"
669 const char jcc_h_rcs[] = JCC_H_VERSION;
670 const char project_h_rcs[] = PROJECT_H_VERSION;
673 struct client_state clients[1];
674 struct file_list files[1];
676 #ifdef FEATURE_STATISTICS
677 int urls_read = 0; /* total nr of urls read inc rejected */
678 int urls_rejected = 0; /* total nr of urls rejected */
679 #endif /* def FEATURE_STATISTICS */
681 #ifdef FEATURE_GRACEFUL_TERMINATION
685 static void listen_loop(void);
686 static void chat(struct client_state *csp);
688 void serve(struct client_state *csp);
689 #else /* ifndef AMIGA */
690 static void serve(struct client_state *csp);
691 #endif /* def AMIGA */
694 static int32 server_thread(void *data);
695 #endif /* def __BEOS__ */
698 #define sleep(N) Sleep(((N) * 1000))
702 #define sleep(N) DosSleep(((N) * 100))
707 * Hit OSX over the head with a hammer. Protect all *_r functions.
709 pthread_mutex_t gmtime_mutex;
710 pthread_mutex_t localtime_mutex;
711 pthread_mutex_t gethostbyaddr_mutex;
712 pthread_mutex_t gethostbyname_mutex;
713 #endif /* def OSX_DARWIN */
715 #if defined(unix) || defined(__EMX__)
716 const char *basedir = NULL;
717 const char *pidfile = NULL;
718 int received_hup_signal = 0;
719 #endif /* defined unix */
721 /* The vanilla wafer. */
722 static const char VANILLA_WAFER[] =
723 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
724 "Do_not_send_me_any_copyrighted_information_other_than_the_"
725 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
726 "In_particular_do_not_send_me_any_cookies_that_"
727 "are_subject_to_a_claim_of_copyright_by_anybody._"
728 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
729 "(copyright_or_otherwise)_applying_to_any_cookie._";
732 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
733 /*********************************************************************
735 * Function : sig_handler
737 * Description : Signal handler for different signals.
738 * Exit gracefully on ABRT, TERM and INT
739 * or set a flag that will cause the errlog
740 * to be reopened by the main thread on HUP.
743 * 1 : the_signal = the signal cause this function to call
747 *********************************************************************/
748 static void sig_handler(int the_signal)
755 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
763 received_hup_signal = 1;
768 * We shouldn't be here, unless we catch signals
769 * in main() that we can't handle here!
771 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
779 /*********************************************************************
783 * Description : Once a connection to the client has been accepted,
784 * this function is called (via serve()) to handle the
785 * main business of the communication. When this
786 * function returns, the caller must close the client
790 * 1 : csp = Current client state (buffers, headers, etc...)
792 * Returns : On success, the number of bytes written are returned (zero
793 * indicates nothing was written). On error, -1 is returned,
794 * and errno is set appropriately. If count is zero and the
795 * file descriptor refers to a regular file, 0 will be
796 * returned without causing any other effect. For a special
797 * file, the results are not portable.
799 *********************************************************************/
800 static void chat(struct client_state *csp)
803 * This next lines are a little ugly, but they simplifies the if statements
804 * below. Basically if TOGGLE, then we want the if to test if the
805 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
806 * then we want the if to test for CSP_FLAG_FORCED , else we don't
808 #ifdef FEATURE_TOGGLE
809 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
810 #else /* ifndef FEATURE_TOGGLE */
811 # define IS_TOGGLED_ON_AND
812 #endif /* ndef FEATURE_TOGGLE */
813 #ifdef FEATURE_FORCE_LOAD
814 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
815 #else /* ifndef FEATURE_FORCE_LOAD */
816 # define IS_NOT_FORCED_AND
817 #endif /* def FEATURE_FORCE_LOAD */
819 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
821 char buf[BUFFER_SIZE];
829 int ms_iis5_hack = 0;
831 const struct forward_spec * fwd;
832 struct http_request *http;
833 int len; /* for buffer sizes */
834 #ifdef FEATURE_KILL_POPUPS
835 int block_popups; /* bool, 1==will block popups */
836 int block_popups_now = 0; /* bool, 1==currently blocking popups */
837 #endif /* def FEATURE_KILL_POPUPS */
839 int pcrs_filter; /* bool, 1==will filter through pcrs */
840 int gif_deanimate; /* bool, 1==will deanimate gifs */
842 /* Function that does the content filtering for the current request */
843 char *(*content_filter)() = NULL;
845 /* Skeleton for HTTP response, if we should intercept the request */
846 struct http_response *rsp;
851 * Read the client's request. Note that since we're not using select() we
852 * could get blocked here if a client connected, then didn't say anything!
857 len = read_socket(csp->cfd, buf, sizeof(buf));
859 if (len <= 0) break; /* error! */
862 * If there is no memory left for buffering the
863 * request, there is nothing we can do but hang up
865 if (add_to_iob(csp, buf, len))
870 req = get_header(csp);
874 break; /* no HTTP request! */
879 continue; /* more to come! */
882 #ifdef FEATURE_FORCE_LOAD
883 /* If this request contains the FORCE_PREFIX,
884 * better get rid of it now and set the force flag --oes
887 if (strstr(req, FORCE_PREFIX))
889 strclean(req, FORCE_PREFIX);
890 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
891 csp->flags |= CSP_FLAG_FORCED;
894 #endif /* def FEATURE_FORCE_LOAD */
896 parse_http_request(req, http, csp);
901 if (http->cmd == NULL)
903 strcpy(buf, CHEADER);
904 write_socket(csp->cfd, buf, strlen(buf));
906 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
908 free_http_request(http);
912 /* decide how to route the HTTP request */
914 if ((fwd = forward_url(http, csp)) == NULL)
916 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
917 /* Never get here - LOG_LEVEL_FATAL causes program exit */
920 /* build the http request to send to the server
921 * we have to do one of the following:
923 * create = use the original HTTP request to create a new
924 * HTTP request that has either the path component
925 * without the http://domainspec (w/path) or the
926 * full orininal URL (w/url)
927 * Note that the path and/or the HTTP version may
928 * have been altered by now.
930 * connect = Open a socket to the host:port of the server
931 * and short-circuit server and client socket.
933 * pass = Pass the request unchanged if forwarding a CONNECT
934 * request to a parent proxy. Note that we'll be sending
935 * the CFAIL message ourselves if connecting to the parent
936 * fails, but we won't send a CSUCCEED message if it works,
937 * since that would result in a double message (ours and the
938 * parent's). After sending the request to the parent, we simply
944 * +--------+--------+
946 * 0 | create | connect|
948 * Forwarding +--------+--------+
950 * 1 | create | pass |
952 * +--------+--------+
957 * Determine the actions for this URL
959 #ifdef FEATURE_TOGGLE
960 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
962 /* Most compatible set of actions (i.e. none) */
963 init_current_action(csp->action);
966 #endif /* ndef FEATURE_TOGGLE */
968 url_actions(http, csp);
973 * Check if a CONNECT request is allowable:
974 * In the absence of a +limit-connect action, allow only port 443.
975 * If there is an action, allow whatever matches the specificaton.
979 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
980 || (csp->action->flags & ACTION_LIMIT_CONNECT
981 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
983 strcpy(buf, CFORBIDDEN);
984 write_socket(csp->cfd, buf, strlen(buf));
986 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
987 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
995 * Downgrade http version from 1.1 to 1.0 if +downgrade
998 if ( (http->ssl == 0)
999 && (!strcmpic(http->ver, "HTTP/1.1"))
1000 && (csp->action->flags & ACTION_DOWNGRADE))
1003 http->ver = strdup("HTTP/1.0");
1005 if (http->ver == NULL)
1007 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1012 * Save a copy of the original request for logging
1014 http->ocmd = strdup(http->cmd);
1016 if (http->ocmd == NULL)
1018 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
1022 * (Re)build the HTTP request for non-SSL requests.
1023 * If forwarding, use the whole URL, else, use only the path.
1029 http->cmd = strdup(http->gpc);
1030 string_append(&http->cmd, " ");
1032 if (fwd->forward_host)
1034 string_append(&http->cmd, http->url);
1038 string_append(&http->cmd, http->path);
1040 string_append(&http->cmd, " ");
1041 string_append(&http->cmd, http->ver);
1043 if (http->cmd == NULL)
1045 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1047 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", http->cmd);
1049 enlist(csp->headers, http->cmd);
1053 * If the user has not supplied any wafers, and the user has not
1054 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1056 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1057 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1059 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1063 #ifdef FEATURE_KILL_POPUPS
1064 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
1065 #endif /* def FEATURE_KILL_POPUPS */
1067 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
1068 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
1070 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
1072 /* grab the rest of the client's headers */
1076 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1078 len = read_socket(csp->cfd, buf, sizeof(buf));
1081 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1086 * If there is no memory left for buffering the
1087 * request, there is nothing we can do but hang up
1089 if (add_to_iob(csp, buf, len))
1096 if (p == NULL) break;
1098 enlist(csp->headers, p);
1103 * We have a request. Now, check to see if we need to
1104 * intercept it, i.e. If ..
1108 /* We may not forward the request by rfc2616 sect 14.31 */
1109 (NULL != (rsp = direct_response(csp)))
1111 /* or a CGI call was detected and answered */
1112 || (NULL != (rsp = dispatch_cgi(csp)))
1114 /* or we are enabled and... */
1115 || (IS_ENABLED_AND (
1117 /* ..the request was blocked */
1118 ( NULL != (rsp = block_url(csp)))
1120 /* ..or untrusted */
1121 #ifdef FEATURE_TRUST
1122 || ( NULL != (rsp = trust_url(csp)))
1123 #endif /* def FEATURE_TRUST */
1125 /* ..or a fast redirect kicked in */
1126 #ifdef FEATURE_FAST_REDIRECTS
1127 || (((csp->action->flags & ACTION_FAST_REDIRECTS) != 0) &&
1128 (NULL != (rsp = redirect_url(csp))))
1129 #endif /* def FEATURE_FAST_REDIRECTS */
1133 /* Write the answer to the client */
1134 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1135 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1137 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1140 #ifdef FEATURE_STATISTICS
1141 /* Count as a rejected request */
1142 csp->flags |= CSP_FLAG_REJECTED;
1143 #endif /* def FEATURE_STATISTICS */
1145 /* Log (FIXME: All intercept reasons apprear as "crunch" with Status 200) */
1146 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
1147 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
1149 /* Clean up and return */
1150 free_http_response(rsp);
1154 hdr = sed(client_patterns, add_client_headers, csp);
1157 /* FIXME Should handle error properly */
1158 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1161 list_remove_all(csp->headers);
1163 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1165 if (fwd->forward_host)
1167 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1168 fwd->forward_host, fwd->forward_port, http->hostport);
1172 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1175 /* here we connect to the server, gateway, or the forwarder */
1177 csp->sfd = forwarded_connect(fwd, http, csp);
1179 if (csp->sfd == JB_INVALID_SOCKET)
1181 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1184 if (errno == EINVAL)
1186 rsp = error_response(csp, "no-such-domain", errno);
1188 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
1189 csp->ip_addr_str, http->ocmd);
1193 rsp = error_response(csp, "connect-failed", errno);
1195 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1196 csp->ip_addr_str, http->ocmd);
1200 /* Write the answer to the client */
1203 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1204 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1206 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1210 free_http_response(rsp);
1215 log_error(LOG_LEVEL_CONNECT, "OK");
1217 if (fwd->forward_host || (http->ssl == 0))
1219 /* write the client's (modified) header to the server
1220 * (along with anything else that may be in the buffer)
1223 if (write_socket(csp->sfd, hdr, strlen(hdr))
1224 || (flush_socket(csp->sfd, csp) < 0))
1226 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1229 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1230 csp->ip_addr_str, http->ocmd);
1232 rsp = error_response(csp, "connect-failed", errno);
1236 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1237 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1239 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1243 free_http_response(rsp);
1251 * We're running an SSL tunnel and we're not forwarding,
1252 * so just send the "connect succeeded" message to the
1253 * client, flush the rest, and get out of the way.
1255 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1256 csp->ip_addr_str, http->ocmd);
1258 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
1266 /* we're finished with the client's header */
1269 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1271 /* pass data between the client and server
1272 * until one or the other shuts down the connection.
1281 * FD_ZERO here seems to point to an errant macro which crashes.
1282 * So do this by hand for now...
1284 memset(&rfds,0x00,sizeof(fd_set));
1288 FD_SET(csp->cfd, &rfds);
1289 FD_SET(csp->sfd, &rfds);
1291 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
1295 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1299 /* this is the body of the browser's request
1300 * just read it and write it.
1303 if (FD_ISSET(csp->cfd, &rfds))
1305 len = read_socket(csp->cfd, buf, sizeof(buf));
1309 break; /* "game over, man" */
1312 if (write_socket(csp->sfd, buf, (size_t)len))
1314 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1321 * The server wants to talk. It could be the header or the body.
1322 * If `hdr' is null, then it's the header otherwise it's the body.
1323 * FIXME: Does `hdr' really mean `host'? No.
1327 if (FD_ISSET(csp->sfd, &rfds))
1330 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1334 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1336 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1337 csp->ip_addr_str, http->ocmd);
1339 rsp = error_response(csp, "connect-failed", errno);
1343 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1344 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1346 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1350 free_http_response(rsp);
1354 /* Add a trailing zero. This lets filter_popups
1355 * use string operations.
1359 #ifdef FEATURE_KILL_POPUPS
1360 /* Filter the popups on this read. */
1361 if (block_popups_now)
1363 filter_popups(buf, csp);
1365 #endif /* def FEATURE_KILL_POPUPS */
1367 /* Normally, this would indicate that we've read
1368 * as much as the server has sent us and we can
1369 * close the client connection. However, Microsoft
1370 * in its wisdom has released IIS/5 with a bug that
1371 * prevents it from sending the trailing \r\n in
1372 * a 302 redirect header (and possibly other headers).
1373 * To work around this if we've haven't parsed
1374 * a full header we'll append a trailing \r\n
1375 * and see if this now generates a valid one.
1377 * This hack shouldn't have any impacts. If we've
1378 * already transmitted the header or if this is a
1379 * SSL connection, then we won't bother with this
1380 * hack. So we only work on partially received
1381 * headers. If we append a \r\n and this still
1382 * doesn't generate a valid header, then we won't
1383 * transmit anything to the client.
1388 if (server_body || http->ssl)
1391 * If we have been buffering up the document,
1392 * now is the time to apply content modification
1393 * and send the result to the client.
1398 * If the content filter fails, use the original
1399 * buffer and length.
1400 * (see p != NULL ? p : csp->iob->cur below)
1402 if (NULL == (p = (*content_filter)(csp)))
1404 csp->content_length = csp->iob->eod - csp->iob->cur;
1407 hdr = sed(server_patterns, add_server_headers, csp);
1410 /* FIXME Should handle error properly */
1411 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1414 if (write_socket(csp->cfd, hdr, strlen(hdr))
1415 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
1417 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1427 break; /* "game over, man" */
1431 * This is NOT the body, so
1432 * Let's pretend the server just sent us a blank line.
1434 len = sprintf(buf, "\r\n");
1437 * Now, let the normal header parsing algorithm below do its
1438 * job. If it fails, we'll exit instead of continuing.
1445 * If this is an SSL connection or we're in the body
1446 * of the server document, just write it to the client,
1447 * unless we need to buffer the body for later content-filtering
1450 if (server_body || http->ssl)
1455 * If there is no memory left for buffering the content, or the buffer limit
1456 * has been reached, switch to non-filtering mode, i.e. make & write the
1457 * header, flush the iob and buf, and get out of the way.
1459 if (add_to_iob(csp, buf, len))
1464 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
1466 hdr = sed(server_patterns, add_server_headers, csp);
1470 * Memory is too tight to even generate the header.
1471 * Send our static "Out-of-memory" page.
1473 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
1474 rsp = cgi_error_memory();
1476 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1477 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1479 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1484 hdrlen = strlen(hdr);
1486 if (write_socket(csp->cfd, hdr, hdrlen)
1487 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
1488 || (write_socket(csp->cfd, buf, (size_t) len)))
1490 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
1496 byte_count += hdrlen + flushed + len;
1498 content_filter = NULL;
1505 if (write_socket(csp->cfd, buf, (size_t)len))
1507 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
1516 /* we're still looking for the end of the
1517 * server's header ... (does that make header
1518 * parsing an "out of body experience" ?
1522 * buffer up the data we just read. If that fails,
1523 * there's little we can do but send our static
1524 * out-of-memory page.
1526 if (add_to_iob(csp, buf, len))
1528 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
1529 rsp = cgi_error_memory();
1531 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1532 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1534 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1539 /* get header lines from the iob */
1541 while ((p = get_header(csp)) != NULL)
1545 /* see following note */
1548 enlist(csp->headers, p);
1552 /* NOTE: there are no "empty" headers so
1553 * if the pointer `p' is not NULL we must
1554 * assume that we reached the end of the
1555 * buffer before we hit the end of the header.
1562 /* Well, we tried our MS IIS/5
1563 * hack and it didn't work.
1564 * The header is incomplete
1565 * and there isn't anything
1566 * we can do about it.
1572 /* Since we have to wait for
1573 * more from the server before
1574 * we can parse the headers
1575 * we just continue here.
1581 /* we have now received the entire header.
1582 * filter it and send the result to the client
1585 hdr = sed(server_patterns, add_server_headers, csp);
1588 /* FIXME Should handle error properly */
1589 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1592 #ifdef FEATURE_KILL_POPUPS
1593 /* Start blocking popups if appropriate. */
1595 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1596 !http->ssl && /* We talk plaintext */
1597 block_popups) /* Policy allows */
1599 block_popups_now = 1;
1601 * Filter the part of the body that came in the same read
1602 * as the last headers:
1604 filter_popups(csp->iob->cur, csp);
1607 #endif /* def FEATURE_KILL_POPUPS */
1609 /* Buffer and pcrs filter this if appropriate. */
1611 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1612 !http->ssl && /* We talk plaintext */
1613 pcrs_filter) /* Policy allows */
1615 content_filter = pcrs_filter_response;
1618 /* Buffer and gif_deanimate this if appropriate. */
1620 if ((csp->content_type & CT_GIF) && /* It's a image/gif MIME-Type */
1621 !http->ssl && /* We talk plaintext */
1622 gif_deanimate) /* Policy allows */
1624 content_filter = gif_deanimate_response;
1628 * Only write if we're not buffering for content modification
1630 if (!content_filter)
1632 /* write the server's (modified) header to
1633 * the client (along with anything else that
1634 * may be in the buffer)
1637 if (write_socket(csp->cfd, hdr, strlen(hdr))
1638 || ((len = flush_socket(csp->cfd, csp)) < 0))
1640 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1642 /* the write failed, so don't bother
1643 * mentioning it to the client...
1644 * it probably can't hear us anyway.
1653 /* we're finished with the server's header */
1658 /* If this was a MS IIS/5 hack then it means
1659 * the server has already closed the
1660 * connection. Nothing more to read. Time
1671 return; /* huh? we should never get here */
1674 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
1675 csp->ip_addr_str, http->ocmd, byte_count);
1679 /*********************************************************************
1683 * Description : This is little more than chat. We only "serve" to
1684 * to close any socket that chat may have opened.
1687 * 1 : csp = Current client state (buffers, headers, etc...)
1691 *********************************************************************/
1693 void serve(struct client_state *csp)
1694 #else /* ifndef AMIGA */
1695 static void serve(struct client_state *csp)
1696 #endif /* def AMIGA */
1699 close_socket(csp->cfd);
1701 if (csp->sfd != JB_INVALID_SOCKET)
1703 close_socket(csp->sfd);
1706 csp->flags &= ~CSP_FLAG_ACTIVE;
1712 /*********************************************************************
1714 * Function : server_thread
1716 * Description : We only exist to call `serve' in a threaded environment.
1719 * 1 : data = Current client state (buffers, headers, etc...)
1721 * Returns : Always 0.
1723 *********************************************************************/
1724 static int32 server_thread(void *data)
1726 serve((struct client_state *) data);
1733 /*********************************************************************
1737 * Description : Print usage info & exit.
1739 * Parameters : Pointer to argv[0] for identifying ourselves
1743 *********************************************************************/
1744 void usage(const char *myname)
1746 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
1747 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
1748 "Aborting.\n", myname);
1755 /*********************************************************************
1759 * Description : Load the config file and start the listen loop.
1760 * This function is a lot more *sane* with the `load_config'
1761 * and `listen_loop' functions; although it stills does
1762 * a *little* too much for my taste.
1765 * 1 : argc = Number of parameters (including $0).
1766 * 2 : argv = Array of (char *)'s to the parameters.
1768 * Returns : 1 if : can't open config file, unrecognized directive,
1769 * stats requested in multi-thread mode, can't open the
1770 * log file, can't open the jar file, listen port is invalid,
1771 * any load fails, and can't bind port.
1773 * Else main never returns, the process must be signaled
1774 * to terminate execution. Or, on Windows, use the
1775 * "File", "Exit" menu option.
1777 *********************************************************************/
1779 int real_main(int argc, const char *argv[])
1781 int main(int argc, const char *argv[])
1786 struct passwd *pw = NULL;
1787 struct group *grp = NULL;
1796 #if !defined(_WIN32)
1804 * Parse the command line arguments
1806 while (++argc_pos < argc)
1808 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1810 if (strcmp(argv[argc_pos], "--help") == 0)
1815 else if(strcmp(argv[argc_pos], "--version") == 0)
1817 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
1821 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
1826 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
1828 if (++argc_pos == argc) usage(argv[0]);
1829 pidfile = strdup(argv[argc_pos]);
1832 else if (strcmp(argv[argc_pos], "--user" ) == 0)
1834 if (++argc_pos == argc) usage(argv[argc_pos]);
1836 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
1839 if (NULL == (grp = getgrnam(p)))
1841 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
1845 if (NULL == (pw = getpwnam(argv[argc_pos])))
1847 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
1850 if (p != NULL) *--p = '\0';
1853 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
1857 #endif /* defined(unix) */
1859 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
1861 configfile = argv[argc_pos];
1864 } /* -END- while (more arguments) */
1867 if ( *configfile != '/' )
1869 char *abs_file, cwd[1024];
1871 /* make config-filename absolute here */
1872 if ( !(getcwd(cwd, sizeof(cwd))))
1874 perror("get working dir failed");
1878 if (!(basedir = strdup(cwd))
1879 || (!(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))))
1881 perror("malloc failed");
1884 strcpy( abs_file, basedir );
1885 strcat( abs_file, "/" );
1886 strcat( abs_file, configfile );
1887 configfile = abs_file;
1889 #endif /* defined unix */
1893 clients->next = NULL;
1897 #elif defined(_WIN32)
1903 * Prepare global mutex semaphores
1905 pthread_mutex_init(&gmtime_mutex,0);
1906 pthread_mutex_init(&localtime_mutex,0);
1907 pthread_mutex_init(&gethostbyaddr_mutex,0);
1908 pthread_mutex_init(&gethostbyname_mutex,0);
1909 #endif /* def OSX_DARWIN */
1912 * Unix signal handling
1914 * Catch the abort, interrupt and terminate signals for a graceful exit
1915 * Catch the hangup signal so the errlog can be reopened.
1916 * Ignore the broken pipe signals (FIXME: Why?)
1918 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1921 const int catched_signals[] = { SIGABRT, SIGTERM, SIGINT, SIGHUP, 0 };
1922 const int ignored_signals[] = { SIGPIPE, 0 };
1924 for (idx = 0; catched_signals[idx] != 0; idx++)
1926 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
1928 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
1932 for (idx = 0; ignored_signals[idx] != 0; idx++)
1934 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
1936 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
1941 #else /* ifdef _WIN32 */
1942 # ifdef _WIN_CONSOLE
1944 * We *are* in a windows console app.
1945 * Print a verbose messages about FAQ's and such
1947 printf(win32_blurb);
1948 # endif /* def _WIN_CONSOLE */
1949 #endif /* def _WIN32 */
1952 /* Initialize the CGI subsystem */
1953 cgi_init_error_messages();
1956 * If runnig on unix and without the --nodaemon
1957 * option, become a daemon. I.e. fork, detach
1958 * from tty and get process group leadership
1971 if ( pid < 0 ) /* error */
1976 else if ( pid != 0 ) /* parent */
1981 * must check for errors
1982 * child died due to missing files aso
1985 wpid = waitpid( pid, &status, WNOHANG );
1994 /* Should be more portable, but not as well tested */
1999 #else /* ndef __FreeBSD__ */
2001 #endif /* ndef __FreeBSD__ */
2002 fd = open("/dev/tty", O_RDONLY);
2005 /* no error check here */
2006 ioctl( fd, TIOCNOTTY,0 );
2010 /* FIXME: should close stderr (fd 2) here too, but the test
2012 * and load config file is done in listen_loop() and puts
2013 * some messages on stderr there.
2020 } /* -END- if (!no_daemon) */
2023 * As soon as we have written the PID file, we can switch
2024 * to the user and group ID indicated by the --user option
2030 if (((NULL != grp) && setgid(grp->gr_gid)) || (setgid(pw->pw_gid)))
2032 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
2038 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
2040 if (chroot(pw->pw_dir) < 0)
2042 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
2046 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
2049 if (setuid(pw->pw_uid))
2051 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
2055 char putenv_dummy[64];
2057 strcpy(putenv_dummy, "HOME=/");
2058 if (putenv(putenv_dummy) != 0)
2060 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
2063 snprintf(putenv_dummy, 64, "USER=%s", pw->pw_name);
2064 if (putenv(putenv_dummy) != 0)
2066 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
2072 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
2075 #endif /* defined unix */
2085 /*********************************************************************
2087 * Function : bind_port_helper
2089 * Description : Bind the listen port. Handles logging, and aborts
2093 * 1 : config = Privoxy configuration. Specifies port
2096 * Returns : Port that was opened.
2098 *********************************************************************/
2099 static jb_socket bind_port_helper(struct configuration_spec * config)
2104 if ( (config->haddr != NULL)
2105 && (config->haddr[0] == '1')
2106 && (config->haddr[1] == '2')
2107 && (config->haddr[2] == '7')
2108 && (config->haddr[3] == '.') )
2110 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
2113 else if (config->haddr == NULL)
2115 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
2120 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
2121 config->hport, config->haddr);
2124 result = bind_port(config->haddr, config->hport, &bfd);
2131 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2132 "There may be another Privoxy or some other "
2133 "proxy running on port %d",
2134 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
2135 config->hport, config->hport);
2138 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2139 "The hostname is not resolvable",
2140 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2143 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
2144 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2147 /* shouldn't get here */
2148 return JB_INVALID_SOCKET;
2151 config->need_bind = 0;
2157 /*********************************************************************
2159 * Function : listen_loop
2161 * Description : bind the listen port and enter a "FOREVER" listening loop.
2167 *********************************************************************/
2168 static void listen_loop(void)
2170 struct client_state *csp = NULL;
2172 struct configuration_spec * config;
2174 config = load_config();
2176 bfd = bind_port_helper(config);
2178 #ifdef FEATURE_GRACEFUL_TERMINATION
2179 while (!g_terminate)
2184 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
2185 while (waitpid(-1, NULL, WNOHANG) > 0)
2187 /* zombie children */
2189 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
2192 * Free data that was used by died threads
2198 * Re-open the errlog after HUP signal
2200 if (received_hup_signal)
2202 init_error_log(Argv[0], config->logfile, config->debug);
2203 received_hup_signal = 0;
2208 #ifdef FEATURE_COOKIE_JAR
2210 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
2211 * already open. I think unload_configfile() is not being run, which should do
2212 * this work. Until that can get resolved, we'll use this workaround.
2216 if (csp->config->jar)
2218 fclose(csp->config->jar);
2219 csp->config->jar = NULL;
2221 #endif /* FEATURE_COOKIE_JAR */
2222 #endif /* __OS2__ */
2224 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
2226 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
2230 csp->flags |= CSP_FLAG_ACTIVE;
2231 csp->sfd = JB_INVALID_SOCKET;
2233 csp->config = config = load_config();
2235 if ( config->need_bind )
2238 * Since we were listening to the "old port", we will not see
2239 * a "listen" param change until the next IJB request. So, at
2240 * least 1 more request must be made for us to find the new
2241 * setting. I am simply closing the old socket and binding the
2244 * Which-ever is correct, we will serve 1 more page via the
2245 * old settings. This should probably be a "show-proxy-args"
2246 * request. This should not be a so common of an operation
2247 * that this will hurt people's feelings.
2252 bfd = bind_port_helper(config);
2255 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
2257 if (!accept_connection(csp, bfd))
2259 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
2272 log_error(LOG_LEVEL_CONNECT, "OK");
2275 #ifdef FEATURE_TOGGLE
2276 if (global_toggle_state)
2278 csp->flags |= CSP_FLAG_TOGGLED_ON;
2280 #endif /* def FEATURE_TOGGLE */
2282 if (run_loader(csp))
2284 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
2285 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2289 if (block_acl(NULL,csp))
2291 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
2292 close_socket(csp->cfd);
2296 #endif /* def FEATURE_ACL */
2298 /* add it to the list of clients */
2299 csp->next = clients->next;
2300 clients->next = csp;
2302 if (config->multi_threaded)
2306 /* this is a switch () statment in the C preprocessor - ugh */
2307 #undef SELECTED_ONE_OPTION
2309 /* Use Pthreads in preference to native code */
2310 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
2311 #define SELECTED_ONE_OPTION
2313 pthread_t the_thread;
2314 pthread_attr_t attrs;
2316 pthread_attr_init(&attrs);
2317 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
2318 child_id = (pthread_create(&the_thread, &attrs,
2319 (void*)serve, csp) ? -1 : 0);
2320 pthread_attr_destroy(&attrs);
2324 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
2325 #define SELECTED_ONE_OPTION
2326 child_id = _beginthread(
2327 (void (*)(void *))serve,
2332 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
2333 #define SELECTED_ONE_OPTION
2334 child_id = _beginthread(
2335 (void(* _Optlink)(void*))serve,
2341 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
2342 #define SELECTED_ONE_OPTION
2344 thread_id tid = spawn_thread
2345 (server_thread, "server", B_NORMAL_PRIORITY, csp);
2347 if ((tid >= 0) && (resume_thread(tid) == B_OK))
2349 child_id = (int) tid;
2358 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2359 #define SELECTED_ONE_OPTION
2360 csp->cfd = ReleaseSocket(csp->cfd, -1);
2362 if((child_id = (int)CreateNewProcTags(
2363 NP_Entry, (ULONG)server_thread,
2364 NP_Output, Output(),
2365 NP_CloseOutput, FALSE,
2366 NP_Name, (ULONG)"privoxy child",
2367 NP_StackSize, 200*1024,
2371 ((struct Task *)child_id)->tc_UserData = csp;
2372 Signal((struct Task *)child_id, SIGF_SINGLE);
2377 #if !defined(SELECTED_ONE_OPTION)
2380 /* This block is only needed when using fork().
2381 * When using threads, the server thread was
2382 * created and run by the call to _beginthread().
2384 if (child_id == 0) /* child */
2387 #ifdef FEATURE_TOGGLE
2388 int inherited_toggle_state = global_toggle_state;
2389 #endif /* def FEATURE_TOGGLE */
2394 * If we've been toggled or we've blocked the request, tell Mom
2397 #ifdef FEATURE_TOGGLE
2398 if (inherited_toggle_state != global_toggle_state)
2400 rc |= RC_FLAG_TOGGLED;
2402 #endif /* def FEATURE_TOGGLE */
2404 #ifdef FEATURE_STATISTICS
2405 if (csp->flags & CSP_FLAG_REJECTED)
2407 rc |= RC_FLAG_BLOCKED;
2409 #endif /* ndef FEATURE_STATISTICS */
2413 else if (child_id > 0) /* parent */
2415 /* in a fork()'d environment, the parent's
2416 * copy of the client socket and the CSP
2420 #if !defined(_WIN32) && !defined(__CYGWIN__)
2422 wait( &child_status );
2425 * Evaluate child's return code: If the child has
2426 * - been toggled, toggle ourselves
2427 * - blocked its request, bump up the stats counter
2430 #ifdef FEATURE_TOGGLE
2431 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
2433 global_toggle_state = !global_toggle_state;
2435 #endif /* def FEATURE_TOGGLE */
2437 #ifdef FEATURE_STATISTICS
2439 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
2443 #endif /* def FEATURE_STATISTICS */
2445 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
2446 close_socket(csp->cfd);
2447 csp->flags &= ~CSP_FLAG_ACTIVE;
2451 #undef SELECTED_ONE_OPTION
2452 /* end of cpp switch () */
2454 if (child_id < 0) /* failed */
2456 char buf[BUFFER_SIZE];
2458 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
2460 sprintf(buf , "Privoxy: can't fork: errno = %d", errno);
2462 write_socket(csp->cfd, buf, strlen(buf));
2463 close_socket(csp->cfd);
2464 csp->flags &= ~CSP_FLAG_ACTIVE;
2475 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
2477 /* Clean up. Aim: free all memory (no leaks) */
2478 #ifdef FEATURE_GRACEFUL_TERMINATION
2480 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
2482 unload_current_config_file();
2483 unload_current_actions_file();
2484 unload_current_re_filterfile();
2485 #ifdef FEATURE_TRUST
2486 unload_current_trust_file();
2489 if (config->multi_threaded)
2496 } while ((clients->next != NULL) && (--i > 0));
2500 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
2511 #ifdef FEATURE_COOKIE_JAR
2512 if (NULL != config->jar)
2514 fclose(config->jar);
2518 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
2519 /* Cleanup - remove taskbar icon etc. */
2524 #endif /* FEATURE_GRACEFUL_TERMINATION */