1 const char jcc_rcs[] = "$Id: jcc.c,v 1.92.2.12 2003/07/11 11:34:19 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 1.92.2.12 2003/07/11 11:34:19 oes
37 * No longer ignore SIGCHLD. Fixes bug #769381
39 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
40 * Close jarfile on graceful exit, remove stray line
42 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
43 * Cosmetics: Killed a warning, a typo and an allocation left at exit
45 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
46 * No longer rely on non-POSIX.1 extensions of getcwd().
49 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
50 * Replaced setenv() by posix-compliant putenv()
51 * Thanks to Neil McCalden (nmcc AT users.sf.net).
53 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
54 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
56 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
57 * Clean-up and extension of improvements for forked mode:
58 * - Child's return code now consists of flags RC_FLAG_*
59 * - Reporting toggle to parent now properly #ifdef'ed
60 * - Children now report blocking to parent. This enables
61 * statistics in forked mode
63 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
64 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
65 * Children now report having been toggled through _exit(17), parents
66 * watch for that code and toggle themselves if found.
68 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
69 * 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.
71 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
72 * Fixed two mostly harmless mem leaks
74 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
75 * Fix: Head of global clients list now initialized to NULL
77 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
78 * Added basic support for OPTIONS and TRACE HTTP methods:
79 * - New interceptor direct_response() added in chat().
80 * - sed() moved to earlier in the process, so that the
81 * Host: header is evaluated before actions and forwarding
84 * Revision 1.92 2002/05/08 16:00:46 oes
85 * Chat's buffer handling:
86 * - Fixed bug with unchecked out-of-mem conditions
87 * while reading client request & server headers
88 * - No longer predict if the buffer limit will be exceeded
89 * in the next read -- check add_to_iob's new
90 * return code. If buffer couldn't be extended
91 * (policy or out-of-mem) while
92 * - reading from client: abort
93 * - reading server headers: send error page
94 * - buffering server body for filter: flush,
95 * and if that fails: send error page
97 * Revision 1.91 2002/04/08 20:35:58 swa
100 * Revision 1.90 2002/04/02 14:57:28 oes
101 * Made sending wafers independent of FEATURE_COOKIE_JAR
103 * Revision 1.89 2002/03/31 17:18:59 jongfoster
104 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
106 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
107 * More compiler warning message maintenance
109 * Revision 1.87 2002/03/26 22:29:54 swa
110 * we have a new homepage!
112 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
113 * Workaround for closing the jarfile before load_config() comes around again
115 * Revision 1.85 2002/03/24 15:23:33 jongfoster
118 * Revision 1.84 2002/03/24 13:25:43 swa
119 * name change related issues
121 * Revision 1.83 2002/03/16 23:54:06 jongfoster
122 * Adding graceful termination feature, to help look for memory leaks.
123 * If you enable this (which, by design, has to be done by hand
124 * editing config.h) and then go to http://i.j.b/die, then the program
125 * will exit cleanly after the *next* request. It should free all the
126 * memory that was used.
128 * Revision 1.82 2002/03/13 00:27:05 jongfoster
131 * Revision 1.81 2002/03/12 01:42:50 oes
132 * Introduced modular filters
134 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
135 * OS/2 port maintenance:
136 * - Fixed EMX build - it had decayed a little
137 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
138 * substituted a memset for now.
140 * Revision 1.79 2002/03/09 20:03:52 jongfoster
141 * - Making various functions return int rather than size_t.
142 * (Undoing a recent change). Since size_t is unsigned on
143 * Windows, functions like read_socket that return -1 on
144 * error cannot return a size_t.
146 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
147 * crashes, and also frequently caused JB to jump to 100%
148 * CPU and stay there. (Because it thought it had just
149 * read ((unsigned)-1) == 4Gb of data...)
151 * - The signature of write_socket has changed, it now simply
152 * returns success=0/failure=nonzero.
154 * - Trying to get rid of a few warnings --with-debug on
155 * Windows, I've introduced a new type "jb_socket". This is
156 * used for the socket file descriptors. On Windows, this
157 * is SOCKET (a typedef for unsigned). Everywhere else, it's
158 * an int. The error value can't be -1 any more, so it's
159 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
160 * Windows it maps to the #define INVALID_SOCKET.)
162 * - The signature of bind_port has changed.
164 * Revision 1.78 2002/03/08 21:35:04 oes
165 * Added optional group supplement to --user option. Will now use default group of user if no group given
167 * Revision 1.77 2002/03/07 03:52:06 oes
168 * - Fixed compiler warnings etc
169 * - Improved handling of failed DNS lookups
171 * Revision 1.76 2002/03/06 22:54:35 jongfoster
172 * Automated function-comment nitpicking.
174 * Revision 1.75 2002/03/06 10:02:19 oes
175 * Fixed stupid bug when --user was not given
177 * Revision 1.74 2002/03/06 00:49:31 jongfoster
178 * Fixing warning on Windows
179 * Making #ifdefs that refer to the same variable consistently
180 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
182 * Revision 1.73 2002/03/05 23:57:30 hal9
183 * Stray character 's' on line 1618 was breaking build.
185 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
186 * - Re-enable OS/2 building after new parms were added
187 * - Fix false out of memory report when resolving CGI templates when no IP
188 * address is available of failed attempt (a la no such domain)
190 * Revision 1.71 2002/03/05 18:13:56 oes
191 * Added --user option
193 * Revision 1.70 2002/03/05 04:52:42 oes
194 * Deleted non-errlog debugging code
196 * Revision 1.69 2002/03/04 23:50:00 jongfoster
197 * Splitting off bind_port() call into bind_port_helper(), with
200 * Revision 1.68 2002/03/04 20:17:32 oes
203 * Revision 1.67 2002/03/04 18:18:57 oes
204 * - Removed _DEBUG mode
205 * - Cleand up cmdline parsing
206 * - Introduced --no-daemon, --pidfile options
207 * - Cleaned up signal handling:
208 * - Terminate cleanly on INT, TERM and ABRT
209 * - Schedule logfile for re-opening on HUP
210 * - Ignore CHLD and PIPE
211 * - Leave the rest with their default handlers
212 * - Uniform handler registration
213 * - Added usage() function
214 * - Played styleguide police
216 * Revision 1.66 2002/03/03 15:06:55 oes
217 * Re-enabled automatic config reloading
219 * Revision 1.65 2002/03/03 14:49:11 oes
220 * Fixed CLF logging: Now uses client's original HTTP request
222 * Revision 1.64 2002/03/03 09:18:03 joergs
223 * Made jumbjuster work on AmigaOS again.
225 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
226 * Clean up a little CRLF unpleasantness that suddenly appeared
228 * Revision 1.62 2002/02/20 23:17:23 jongfoster
229 * Detecting some out-of memory conditions and exiting with a log message.
231 * Revision 1.61 2002/01/17 21:01:52 jongfoster
232 * Moving all our URL and URL pattern parsing code to urlmatch.c.
234 * Revision 1.60 2001/12/30 14:07:32 steudten
235 * - Add signal handling (unix)
236 * - Add SIGHUP handler (unix)
237 * - Add creation of pidfile (unix)
238 * - Add action 'top' in rc file (RH)
239 * - Add entry 'SIGNALS' to manpage
240 * - Add exit message to logfile (unix)
242 * Revision 1.59 2001/12/13 14:07:18 oes
243 * Fixed Bug: 503 error page now sent OK
245 * Revision 1.58 2001/11/30 23:37:24 jongfoster
246 * Renaming the Win32 config file to config.txt - this is almost the
247 * same as the corresponding UNIX name "config"
249 * Revision 1.57 2001/11/16 00:47:43 jongfoster
250 * Changing the tty-disconnection code to use setsid().
252 * Revision 1.56 2001/11/13 20:20:54 jongfoster
253 * Tabs->spaces, fixing a bug with missing {} around an if()
255 * Revision 1.55 2001/11/13 20:14:53 jongfoster
256 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
258 * Revision 1.54 2001/11/07 00:03:14 steudten
259 * Give reliable return value if an error
260 * occurs not just 0 with new daemon mode.
262 * Revision 1.53 2001/11/05 21:41:43 steudten
263 * Add changes to be a real daemon just for unix os.
264 * (change cwd to /, detach from controlling tty, set
265 * process group and session leader to the own process.
267 * Add some fatal-error log message for failed malloc().
268 * Add '-d' if compiled with 'configure --with-debug' to
269 * enable debug output.
271 * Revision 1.52 2001/10/26 20:11:20 jongfoster
272 * Fixing type mismatch
274 * Revision 1.51 2001/10/26 17:38:28 oes
277 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
278 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
279 * threads to call select() simultaneously. So, it's time to do a real, live,
280 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
281 * (native). Both versions will work, but using __OS2__ offers multi-threading.
283 * Revision 1.49 2001/10/23 21:41:35 jongfoster
284 * Added call to initialize the (statically-allocated of course)
285 * "out of memory" CGI response.
287 * Revision 1.48 2001/10/10 19:56:46 jongfoster
288 * Moving some code that wasn't cookie-related out of an #ifdef
291 * Revision 1.47 2001/10/10 16:44:36 oes
292 * Added CONNECT destination port limitation check
294 * Revision 1.46 2001/10/08 15:17:41 oes
295 * Re-enabled SSL forwarding
297 * Revision 1.45 2001/10/07 15:42:11 oes
298 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
300 * Moved downgrading of the HTTP version from parse_http_request to
301 * chat(), since we can't decide if it is necessary before we have
302 * determined the actions for the URL. The HTTP command is now
303 * *always* re-built so the repairs need no longer be special-cased.
305 * filter_popups now gets a csp pointer so it can raise the new
306 * CSP_FLAG_MODIFIED flag.
310 * Added configurable size limit for the IOB. If the IOB grows so
311 * large that the next read would exceed the limit, the header
312 * is generated, and the header & unfiltered buffer are flushed
313 * to the client. Chat then continues in non-buffering,
314 * non-filtering body mode.
316 * Revision 1.44 2001/10/02 18:13:57 oes
319 * Revision 1.43 2001/10/02 15:32:13 oes
320 * Moved generation of hdr
322 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
323 * Cleaning up 2 compiler warnings on OS/2.
325 * Revision 1.41 2001/09/16 17:05:14 jongfoster
326 * Removing unused #include showarg.h
328 * Revision 1.40 2001/09/16 15:41:45 jongfoster
329 * Fixing signed/unsigned comparison warning.
331 * Revision 1.39 2001/09/16 13:21:27 jongfoster
332 * Changes to use new list functions.
334 * Revision 1.38 2001/09/16 13:01:46 jongfoster
335 * Removing redundant function call that zeroed zalloc()'d memory.
337 * Revision 1.37 2001/09/10 11:12:24 oes
338 * Deleted unused variable
340 * Revision 1.36 2001/09/10 10:56:15 oes
341 * Silenced compiler warnings
343 * Revision 1.35 2001/07/31 14:44:22 oes
344 * Deleted unused size parameter from filter_popups()
346 * Revision 1.34 2001/07/30 22:08:36 jongfoster
347 * Tidying up #defines:
348 * - All feature #defines are now of the form FEATURE_xxx
349 * - Permanently turned off WIN_GUI_EDIT
350 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
352 * Revision 1.33 2001/07/29 19:32:00 jongfoster
353 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
355 * Revision 1.32 2001/07/29 18:47:05 jongfoster
356 * Adding missing #include "loadcfg.h"
358 * Revision 1.31 2001/07/29 12:17:48 oes
359 * Applied pthread fix by Paul Lieverse
361 * Revision 1.30 2001/07/25 22:57:13 jongfoster
362 * __BEOS__ no longer overrides FEATURE_PTHREAD.
363 * This is because FEATURE_PTHREAD will soon be widely used, so I
364 * want to keep it simple.
366 * Revision 1.29 2001/07/24 12:47:06 oes
367 * Applied BeOS support update by Eugenia
369 * Revision 1.28 2001/07/23 13:26:12 oes
370 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
372 * Revision 1.27 2001/07/19 19:09:47 haroon
373 * - Added code to take care of the situation where while processing the first
374 * server response (which includes the server header), after finding the end
375 * of the headers we were not looking past the end of the headers for
376 * content modification. I enabled it for filter_popups.
377 * Someone else should look to see if other similar operations should be
378 * done to the discarded portion of the buffer.
380 * Note 2001/07/20: No, the other content modification mechanisms will process
381 * the whole iob later anyway. --oes
383 * Revision 1.26 2001/07/18 12:31:36 oes
386 * Revision 1.25 2001/07/15 19:43:49 jongfoster
387 * Supports POSIX threads.
388 * Also removed some unused #includes.
390 * Revision 1.24 2001/07/13 14:00:40 oes
391 * - Generic content modification scheme:
392 * Each feature has its own applicability flag that is set
393 * from csp->action->flags.
394 * Replaced the "filtering" int flag , by a function pointer
395 * "content_filter" to the function that will do the content
396 * modification. If it is != NULL, the document will be buffered
397 * and processed through *content_filter, which must set
398 * csp->content_length and return a modified copy of the body
399 * or return NULL (on failiure).
400 * - Changed csp->is_text to the more generic bitmap csp->content_type
401 * which can currently take the valued CT_TEXT or CT_GIF
403 * - Removed all #ifdef PCRS
405 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
406 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
407 * the `block_acl' call. This prevents a compilation error when the user
408 * does not wish to use the "ACL" feature.
410 * Revision 1.22 2001/06/29 21:45:41 oes
411 * Indentation, CRLF->LF, Tab-> Space
413 * Revision 1.21 2001/06/29 13:29:36 oes
414 * - Cleaned up, improved comments
415 * - Unified all possible interceptors (CGI,
416 * block, trust, fast_redirect) in one
417 * place, with one (CGI) answer generation
418 * mechansim. Much clearer now.
419 * - Removed the GIF image generation, which
420 * is now done in filters.c:block_url()
421 * - Made error conditions like domain lookup
422 * failiure or (various) problems while talking
423 * to the server use cgi.c:error_response()
424 * instead of generating HTML/HTTP in chat() (yuck!)
425 * - Removed logentry from cancelled commit
427 * Revision 1.20 2001/06/09 10:55:28 jongfoster
428 * Changing BUFSIZ ==> BUFFER_SIZE
430 * Revision 1.19 2001/06/07 23:12:52 jongfoster
431 * Replacing function pointer in struct gateway with a directly
432 * called function forwarded_connect().
433 * Replacing struct gateway with struct forward_spec
435 * Revision 1.18 2001/06/03 19:12:16 oes
436 * introduced new cgi handling
438 * Revision 1.17 2001/06/01 20:07:23 jongfoster
439 * Now uses action +image-blocker{} rather than config->tinygif
441 * Revision 1.16 2001/06/01 18:49:17 jongfoster
442 * Replaced "list_share" with "list" - the tiny memory gain was not
443 * worth the extra complexity.
445 * Revision 1.15 2001/05/31 21:24:47 jongfoster
446 * Changed "permission" to "action" throughout.
447 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
448 * Moved vanilla wafer check into chat(), since we must now
449 * decide whether or not to add it based on the URL.
451 * Revision 1.14 2001/05/29 20:14:01 joergs
452 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
455 * Revision 1.13 2001/05/29 09:50:24 jongfoster
456 * Unified blocklist/imagelist/permissionslist.
457 * File format is still under discussion, but the internal changes
460 * Also modified interceptor behaviour:
461 * - We now intercept all URLs beginning with one of the following
462 * prefixes (and *only* these prefixes):
464 * * http://ijbswa.sf.net/config/
465 * * http://ijbswa.sourceforge.net/config/
466 * - New interceptors "home page" - go to http://i.j.b/ to see it.
467 * - Internal changes so that intercepted and fast redirect pages
468 * are not replaced with an image.
469 * - Interceptors now have the option to send a binary page direct
470 * to the client. (i.e. ijb-send-banner uses this)
471 * - Implemented show-url-info interceptor. (Which is why I needed
472 * the above interceptors changes - a typical URL is
473 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
474 * The previous mechanism would not have intercepted that, and
475 * if it had been intercepted then it then it would have replaced
478 * Revision 1.12 2001/05/27 22:17:04 oes
480 * - re_process_buffer no longer writes the modified buffer
481 * to the client, which was very ugly. It now returns the
482 * buffer, which it is then written by chat.
484 * - content_length now adjusts the Content-Length: header
485 * for modified documents rather than crunch()ing it.
486 * (Length info in csp->content_length, which is 0 for
487 * unmodified documents)
489 * - For this to work, sed() is called twice when filtering.
491 * Revision 1.11 2001/05/26 17:27:53 jongfoster
492 * Added support for CLF and fixed LOG_LEVEL_LOG.
493 * Also did CRLF->LF fix of my previous patch.
495 * Revision 1.10 2001/05/26 15:26:15 jongfoster
496 * ACL feature now provides more security by immediately dropping
497 * connections from untrusted hosts.
499 * Revision 1.9 2001/05/26 00:28:36 jongfoster
500 * Automatic reloading of config file.
501 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
502 * Most of the global variables have been moved to a new
503 * struct configuration_spec, accessed through csp->config->globalname
504 * Most of the globals remaining are used by the Win32 GUI.
506 * Revision 1.8 2001/05/25 22:43:18 jongfoster
507 * Fixing minor memory leak and buffer overflow.
509 * Revision 1.7 2001/05/25 22:34:30 jongfoster
512 * Revision 1.6 2001/05/23 00:13:58 joergs
513 * AmigaOS support fixed.
515 * Revision 1.5 2001/05/22 18:46:04 oes
517 * - Enabled filtering banners by size rather than URL
518 * by adding patterns that replace all standard banner
519 * sizes with the "Junkbuster" gif to the re_filterfile
521 * - Enabled filtering WebBugs by providing a pattern
522 * which kills all 1x1 images
524 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
525 * which is selected by the (nonstandard and therefore
526 * capital) letter 'U' in the option string.
527 * It causes the quantifiers to be ungreedy by default.
528 * Appending a ? turns back to greedy (!).
530 * - Added a new interceptor ijb-send-banner, which
531 * sends back the "Junkbuster" gif. Without imagelist or
532 * MSIE detection support, or if tinygif = 1, or the
533 * URL isn't recognized as an imageurl, a lame HTML
534 * explanation is sent instead.
536 * - Added new feature, which permits blocking remote
537 * script redirects and firing back a local redirect
539 * The feature is conditionally compiled, i.e. it
540 * can be disabled with --disable-fast-redirects,
541 * plus it must be activated by a "fast-redirects"
542 * line in the config file, has its own log level
543 * and of course wants to be displayed by show-proxy-args
544 * Note: Boy, all the #ifdefs in 1001 locations and
545 * all the fumbling with configure.in and acconfig.h
546 * were *way* more work than the feature itself :-(
548 * - Because a generic redirect template was needed for
549 * this, tinygif = 3 now uses the same.
551 * - Moved GIFs, and other static HTTP response templates
556 * - Removed some >400 CRs again (Jon, you really worked
559 * Revision 1.4 2001/05/21 19:34:01 jongfoster
560 * Made failure to bind() a fatal error.
562 * Revision 1.3 2001/05/20 01:21:20 jongfoster
563 * Version 2.9.4 checkin.
564 * - Merged popupfile and cookiefile, and added control over PCRS
565 * filtering, in new "permissionsfile".
566 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
567 * file error you now get a message box (in the Win32 GUI) rather
568 * than the program exiting with no explanation.
569 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
571 * - Removed tabs from "config"
572 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
573 * - Bumped up version number.
575 * Revision 1.2 2001/05/17 22:34:44 oes
576 * - Added hint on GIF char array generation to jcc.c
577 * - Cleaned CRLF's from the sources and related files
578 * - Repaired logging for REF and FRC
580 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
581 * Initial import of version 2.9.3 source tree
584 *********************************************************************/
590 #include <sys/types.h>
597 #ifdef FEATURE_PTHREAD
599 #endif /* def FEATURE_PTHREAD */
602 # ifndef FEATURE_PTHREAD
606 # include <windows.h>
607 # include <process.h>
608 # endif /* ndef FEATURE_PTHREAD */
611 # ifndef _WIN_CONSOLE
613 # endif /* ndef _WIN_CONSOLE */
615 #else /* ifndef _WIN32 */
617 # if !defined (__OS2__)
619 # include <sys/wait.h>
620 # endif /* ndef __OS2__ */
621 # include <sys/time.h>
622 # include <sys/stat.h>
623 # include <sys/ioctl.h>
626 #include <sys/termios.h>
637 # include <socket.h> /* BeOS has select() for sockets only. */
638 # include <OS.h> /* declarations for threads and stuff. */
641 # if defined(__EMX__) || defined(__OS2__)
642 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
647 #define bzero(B,N) memset(B,0x00,n)
662 #include "killpopup.h"
663 #include "miscutil.h"
665 #include "jbsockets.h"
670 #include "urlmatch.h"
672 const char jcc_h_rcs[] = JCC_H_VERSION;
673 const char project_h_rcs[] = PROJECT_H_VERSION;
676 struct client_state clients[1];
677 struct file_list files[1];
679 #ifdef FEATURE_STATISTICS
680 int urls_read = 0; /* total nr of urls read inc rejected */
681 int urls_rejected = 0; /* total nr of urls rejected */
682 #endif /* def FEATURE_STATISTICS */
684 #ifdef FEATURE_GRACEFUL_TERMINATION
688 static void listen_loop(void);
689 static void chat(struct client_state *csp);
691 void serve(struct client_state *csp);
692 #else /* ifndef AMIGA */
693 static void serve(struct client_state *csp);
694 #endif /* def AMIGA */
697 static int32 server_thread(void *data);
698 #endif /* def __BEOS__ */
701 #define sleep(N) Sleep(((N) * 1000))
705 #define sleep(N) DosSleep(((N) * 100))
710 * Hit OSX over the head with a hammer. Protect all *_r functions.
712 pthread_mutex_t gmtime_mutex;
713 pthread_mutex_t localtime_mutex;
714 pthread_mutex_t gethostbyaddr_mutex;
715 pthread_mutex_t gethostbyname_mutex;
716 #endif /* def OSX_DARWIN */
718 #if defined(unix) || defined(__EMX__)
719 const char *basedir = NULL;
720 const char *pidfile = NULL;
721 int received_hup_signal = 0;
722 #endif /* defined unix */
724 /* The vanilla wafer. */
725 static const char VANILLA_WAFER[] =
726 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
727 "Do_not_send_me_any_copyrighted_information_other_than_the_"
728 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
729 "In_particular_do_not_send_me_any_cookies_that_"
730 "are_subject_to_a_claim_of_copyright_by_anybody._"
731 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
732 "(copyright_or_otherwise)_applying_to_any_cookie._";
735 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
736 /*********************************************************************
738 * Function : sig_handler
740 * Description : Signal handler for different signals.
741 * Exit gracefully on ABRT, TERM and INT
742 * or set a flag that will cause the errlog
743 * to be reopened by the main thread on HUP.
746 * 1 : the_signal = the signal cause this function to call
750 *********************************************************************/
751 static void sig_handler(int the_signal)
758 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
766 received_hup_signal = 1;
771 * We shouldn't be here, unless we catch signals
772 * in main() that we can't handle here!
774 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
782 /*********************************************************************
786 * Description : Once a connection to the client has been accepted,
787 * this function is called (via serve()) to handle the
788 * main business of the communication. When this
789 * function returns, the caller must close the client
793 * 1 : csp = Current client state (buffers, headers, etc...)
795 * Returns : On success, the number of bytes written are returned (zero
796 * indicates nothing was written). On error, -1 is returned,
797 * and errno is set appropriately. If count is zero and the
798 * file descriptor refers to a regular file, 0 will be
799 * returned without causing any other effect. For a special
800 * file, the results are not portable.
802 *********************************************************************/
803 static void chat(struct client_state *csp)
806 * This next lines are a little ugly, but they simplifies the if statements
807 * below. Basically if TOGGLE, then we want the if to test if the
808 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
809 * then we want the if to test for CSP_FLAG_FORCED , else we don't
811 #ifdef FEATURE_TOGGLE
812 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
813 #else /* ifndef FEATURE_TOGGLE */
814 # define IS_TOGGLED_ON_AND
815 #endif /* ndef FEATURE_TOGGLE */
816 #ifdef FEATURE_FORCE_LOAD
817 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
818 #else /* ifndef FEATURE_FORCE_LOAD */
819 # define IS_NOT_FORCED_AND
820 #endif /* def FEATURE_FORCE_LOAD */
822 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
824 char buf[BUFFER_SIZE];
832 int ms_iis5_hack = 0;
834 const struct forward_spec * fwd;
835 struct http_request *http;
836 int len; /* for buffer sizes */
837 #ifdef FEATURE_KILL_POPUPS
838 int block_popups; /* bool, 1==will block popups */
839 int block_popups_now = 0; /* bool, 1==currently blocking popups */
840 #endif /* def FEATURE_KILL_POPUPS */
842 int pcrs_filter; /* bool, 1==will filter through pcrs */
843 int gif_deanimate; /* bool, 1==will deanimate gifs */
845 /* Function that does the content filtering for the current request */
846 char *(*content_filter)() = NULL;
848 /* Skeleton for HTTP response, if we should intercept the request */
849 struct http_response *rsp;
854 * Read the client's request. Note that since we're not using select() we
855 * could get blocked here if a client connected, then didn't say anything!
860 len = read_socket(csp->cfd, buf, sizeof(buf));
862 if (len <= 0) break; /* error! */
865 * If there is no memory left for buffering the
866 * request, there is nothing we can do but hang up
868 if (add_to_iob(csp, buf, len))
873 req = get_header(csp);
877 break; /* no HTTP request! */
882 continue; /* more to come! */
885 #ifdef FEATURE_FORCE_LOAD
886 /* If this request contains the FORCE_PREFIX,
887 * better get rid of it now and set the force flag --oes
890 if (strstr(req, FORCE_PREFIX))
892 strclean(req, FORCE_PREFIX);
893 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
894 csp->flags |= CSP_FLAG_FORCED;
897 #endif /* def FEATURE_FORCE_LOAD */
899 parse_http_request(req, http, csp);
904 if (http->cmd == NULL)
906 strcpy(buf, CHEADER);
907 write_socket(csp->cfd, buf, strlen(buf));
909 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
911 free_http_request(http);
915 /* decide how to route the HTTP request */
917 if ((fwd = forward_url(http, csp)) == NULL)
919 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
920 /* Never get here - LOG_LEVEL_FATAL causes program exit */
923 /* build the http request to send to the server
924 * we have to do one of the following:
926 * create = use the original HTTP request to create a new
927 * HTTP request that has either the path component
928 * without the http://domainspec (w/path) or the
929 * full orininal URL (w/url)
930 * Note that the path and/or the HTTP version may
931 * have been altered by now.
933 * connect = Open a socket to the host:port of the server
934 * and short-circuit server and client socket.
936 * pass = Pass the request unchanged if forwarding a CONNECT
937 * request to a parent proxy. Note that we'll be sending
938 * the CFAIL message ourselves if connecting to the parent
939 * fails, but we won't send a CSUCCEED message if it works,
940 * since that would result in a double message (ours and the
941 * parent's). After sending the request to the parent, we simply
947 * +--------+--------+
949 * 0 | create | connect|
951 * Forwarding +--------+--------+
953 * 1 | create | pass |
955 * +--------+--------+
960 * Determine the actions for this URL
962 #ifdef FEATURE_TOGGLE
963 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
965 /* Most compatible set of actions (i.e. none) */
966 init_current_action(csp->action);
969 #endif /* ndef FEATURE_TOGGLE */
971 url_actions(http, csp);
976 * Check if a CONNECT request is allowable:
977 * In the absence of a +limit-connect action, allow only port 443.
978 * If there is an action, allow whatever matches the specificaton.
982 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
983 || (csp->action->flags & ACTION_LIMIT_CONNECT
984 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
986 strcpy(buf, CFORBIDDEN);
987 write_socket(csp->cfd, buf, strlen(buf));
989 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
990 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
998 * Downgrade http version from 1.1 to 1.0 if +downgrade
1001 if ( (http->ssl == 0)
1002 && (!strcmpic(http->ver, "HTTP/1.1"))
1003 && (csp->action->flags & ACTION_DOWNGRADE))
1006 http->ver = strdup("HTTP/1.0");
1008 if (http->ver == NULL)
1010 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1015 * Save a copy of the original request for logging
1017 http->ocmd = strdup(http->cmd);
1019 if (http->ocmd == NULL)
1021 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
1025 * (Re)build the HTTP request for non-SSL requests.
1026 * If forwarding, use the whole URL, else, use only the path.
1032 http->cmd = strdup(http->gpc);
1033 string_append(&http->cmd, " ");
1035 if (fwd->forward_host)
1037 string_append(&http->cmd, http->url);
1041 string_append(&http->cmd, http->path);
1043 string_append(&http->cmd, " ");
1044 string_append(&http->cmd, http->ver);
1046 if (http->cmd == NULL)
1048 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1050 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", http->cmd);
1052 enlist(csp->headers, http->cmd);
1056 * If the user has not supplied any wafers, and the user has not
1057 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1059 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1060 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1062 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1066 #ifdef FEATURE_KILL_POPUPS
1067 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
1068 #endif /* def FEATURE_KILL_POPUPS */
1070 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
1071 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
1073 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
1075 /* grab the rest of the client's headers */
1079 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1081 len = read_socket(csp->cfd, buf, sizeof(buf));
1084 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1089 * If there is no memory left for buffering the
1090 * request, there is nothing we can do but hang up
1092 if (add_to_iob(csp, buf, len))
1099 if (p == NULL) break;
1101 enlist(csp->headers, p);
1106 * We have a request. Now, check to see if we need to
1107 * intercept it, i.e. If ..
1111 /* We may not forward the request by rfc2616 sect 14.31 */
1112 (NULL != (rsp = direct_response(csp)))
1114 /* or a CGI call was detected and answered */
1115 || (NULL != (rsp = dispatch_cgi(csp)))
1117 /* or we are enabled and... */
1118 || (IS_ENABLED_AND (
1120 /* ..the request was blocked */
1121 ( NULL != (rsp = block_url(csp)))
1123 /* ..or untrusted */
1124 #ifdef FEATURE_TRUST
1125 || ( NULL != (rsp = trust_url(csp)))
1126 #endif /* def FEATURE_TRUST */
1128 /* ..or a fast redirect kicked in */
1129 #ifdef FEATURE_FAST_REDIRECTS
1130 || (((csp->action->flags & ACTION_FAST_REDIRECTS) != 0) &&
1131 (NULL != (rsp = redirect_url(csp))))
1132 #endif /* def FEATURE_FAST_REDIRECTS */
1136 /* Write the answer to the client */
1137 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1138 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1140 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1143 #ifdef FEATURE_STATISTICS
1144 /* Count as a rejected request */
1145 csp->flags |= CSP_FLAG_REJECTED;
1146 #endif /* def FEATURE_STATISTICS */
1148 /* Log (FIXME: All intercept reasons apprear as "crunch" with Status 200) */
1149 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
1150 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
1152 /* Clean up and return */
1153 free_http_response(rsp);
1157 hdr = sed(client_patterns, add_client_headers, csp);
1160 /* FIXME Should handle error properly */
1161 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1164 list_remove_all(csp->headers);
1166 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1168 if (fwd->forward_host)
1170 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1171 fwd->forward_host, fwd->forward_port, http->hostport);
1175 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1178 /* here we connect to the server, gateway, or the forwarder */
1180 csp->sfd = forwarded_connect(fwd, http, csp);
1182 if (csp->sfd == JB_INVALID_SOCKET)
1184 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1187 if (errno == EINVAL)
1189 rsp = error_response(csp, "no-such-domain", errno);
1191 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
1192 csp->ip_addr_str, http->ocmd);
1196 rsp = error_response(csp, "connect-failed", errno);
1198 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1199 csp->ip_addr_str, http->ocmd);
1203 /* Write the answer to the client */
1206 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1207 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1209 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1213 free_http_response(rsp);
1218 log_error(LOG_LEVEL_CONNECT, "OK");
1220 if (fwd->forward_host || (http->ssl == 0))
1222 /* write the client's (modified) header to the server
1223 * (along with anything else that may be in the buffer)
1226 if (write_socket(csp->sfd, hdr, strlen(hdr))
1227 || (flush_socket(csp->sfd, csp) < 0))
1229 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1232 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1233 csp->ip_addr_str, http->ocmd);
1235 rsp = error_response(csp, "connect-failed", errno);
1239 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1240 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1242 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1246 free_http_response(rsp);
1254 * We're running an SSL tunnel and we're not forwarding,
1255 * so just send the "connect succeeded" message to the
1256 * client, flush the rest, and get out of the way.
1258 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1259 csp->ip_addr_str, http->ocmd);
1261 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
1269 /* we're finished with the client's header */
1272 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1274 /* pass data between the client and server
1275 * until one or the other shuts down the connection.
1284 * FD_ZERO here seems to point to an errant macro which crashes.
1285 * So do this by hand for now...
1287 memset(&rfds,0x00,sizeof(fd_set));
1291 FD_SET(csp->cfd, &rfds);
1292 FD_SET(csp->sfd, &rfds);
1294 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
1298 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1302 /* this is the body of the browser's request
1303 * just read it and write it.
1306 if (FD_ISSET(csp->cfd, &rfds))
1308 len = read_socket(csp->cfd, buf, sizeof(buf));
1312 break; /* "game over, man" */
1315 if (write_socket(csp->sfd, buf, (size_t)len))
1317 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1324 * The server wants to talk. It could be the header or the body.
1325 * If `hdr' is null, then it's the header otherwise it's the body.
1326 * FIXME: Does `hdr' really mean `host'? No.
1330 if (FD_ISSET(csp->sfd, &rfds))
1333 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1337 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1339 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1340 csp->ip_addr_str, http->ocmd);
1342 rsp = error_response(csp, "connect-failed", errno);
1346 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1347 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1349 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1353 free_http_response(rsp);
1357 /* Add a trailing zero. This lets filter_popups
1358 * use string operations.
1362 #ifdef FEATURE_KILL_POPUPS
1363 /* Filter the popups on this read. */
1364 if (block_popups_now)
1366 filter_popups(buf, csp);
1368 #endif /* def FEATURE_KILL_POPUPS */
1370 /* Normally, this would indicate that we've read
1371 * as much as the server has sent us and we can
1372 * close the client connection. However, Microsoft
1373 * in its wisdom has released IIS/5 with a bug that
1374 * prevents it from sending the trailing \r\n in
1375 * a 302 redirect header (and possibly other headers).
1376 * To work around this if we've haven't parsed
1377 * a full header we'll append a trailing \r\n
1378 * and see if this now generates a valid one.
1380 * This hack shouldn't have any impacts. If we've
1381 * already transmitted the header or if this is a
1382 * SSL connection, then we won't bother with this
1383 * hack. So we only work on partially received
1384 * headers. If we append a \r\n and this still
1385 * doesn't generate a valid header, then we won't
1386 * transmit anything to the client.
1391 if (server_body || http->ssl)
1394 * If we have been buffering up the document,
1395 * now is the time to apply content modification
1396 * and send the result to the client.
1401 * If the content filter fails, use the original
1402 * buffer and length.
1403 * (see p != NULL ? p : csp->iob->cur below)
1405 if (NULL == (p = (*content_filter)(csp)))
1407 csp->content_length = csp->iob->eod - csp->iob->cur;
1410 hdr = sed(server_patterns, add_server_headers, csp);
1413 /* FIXME Should handle error properly */
1414 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1417 if (write_socket(csp->cfd, hdr, strlen(hdr))
1418 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
1420 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1430 break; /* "game over, man" */
1434 * This is NOT the body, so
1435 * Let's pretend the server just sent us a blank line.
1437 len = sprintf(buf, "\r\n");
1440 * Now, let the normal header parsing algorithm below do its
1441 * job. If it fails, we'll exit instead of continuing.
1448 * If this is an SSL connection or we're in the body
1449 * of the server document, just write it to the client,
1450 * unless we need to buffer the body for later content-filtering
1453 if (server_body || http->ssl)
1458 * If there is no memory left for buffering the content, or the buffer limit
1459 * has been reached, switch to non-filtering mode, i.e. make & write the
1460 * header, flush the iob and buf, and get out of the way.
1462 if (add_to_iob(csp, buf, len))
1467 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
1469 hdr = sed(server_patterns, add_server_headers, csp);
1473 * Memory is too tight to even generate the header.
1474 * Send our static "Out-of-memory" page.
1476 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
1477 rsp = cgi_error_memory();
1479 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1480 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1482 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1487 hdrlen = strlen(hdr);
1489 if (write_socket(csp->cfd, hdr, hdrlen)
1490 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
1491 || (write_socket(csp->cfd, buf, (size_t) len)))
1493 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
1499 byte_count += hdrlen + flushed + len;
1501 content_filter = NULL;
1508 if (write_socket(csp->cfd, buf, (size_t)len))
1510 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
1519 /* we're still looking for the end of the
1520 * server's header ... (does that make header
1521 * parsing an "out of body experience" ?
1525 * buffer up the data we just read. If that fails,
1526 * there's little we can do but send our static
1527 * out-of-memory page.
1529 if (add_to_iob(csp, buf, len))
1531 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
1532 rsp = cgi_error_memory();
1534 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1535 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1537 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1542 /* get header lines from the iob */
1544 while ((p = get_header(csp)) != NULL)
1548 /* see following note */
1551 enlist(csp->headers, p);
1555 /* NOTE: there are no "empty" headers so
1556 * if the pointer `p' is not NULL we must
1557 * assume that we reached the end of the
1558 * buffer before we hit the end of the header.
1565 /* Well, we tried our MS IIS/5
1566 * hack and it didn't work.
1567 * The header is incomplete
1568 * and there isn't anything
1569 * we can do about it.
1575 /* Since we have to wait for
1576 * more from the server before
1577 * we can parse the headers
1578 * we just continue here.
1584 /* we have now received the entire header.
1585 * filter it and send the result to the client
1588 hdr = sed(server_patterns, add_server_headers, csp);
1591 /* FIXME Should handle error properly */
1592 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1595 #ifdef FEATURE_KILL_POPUPS
1596 /* Start blocking popups if appropriate. */
1598 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1599 !http->ssl && /* We talk plaintext */
1600 block_popups) /* Policy allows */
1602 block_popups_now = 1;
1604 * Filter the part of the body that came in the same read
1605 * as the last headers:
1607 filter_popups(csp->iob->cur, csp);
1610 #endif /* def FEATURE_KILL_POPUPS */
1612 /* Buffer and pcrs filter this if appropriate. */
1614 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1615 !http->ssl && /* We talk plaintext */
1616 pcrs_filter) /* Policy allows */
1618 content_filter = pcrs_filter_response;
1621 /* Buffer and gif_deanimate this if appropriate. */
1623 if ((csp->content_type & CT_GIF) && /* It's a image/gif MIME-Type */
1624 !http->ssl && /* We talk plaintext */
1625 gif_deanimate) /* Policy allows */
1627 content_filter = gif_deanimate_response;
1631 * Only write if we're not buffering for content modification
1633 if (!content_filter)
1635 /* write the server's (modified) header to
1636 * the client (along with anything else that
1637 * may be in the buffer)
1640 if (write_socket(csp->cfd, hdr, strlen(hdr))
1641 || ((len = flush_socket(csp->cfd, csp)) < 0))
1643 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1645 /* the write failed, so don't bother
1646 * mentioning it to the client...
1647 * it probably can't hear us anyway.
1656 /* we're finished with the server's header */
1661 /* If this was a MS IIS/5 hack then it means
1662 * the server has already closed the
1663 * connection. Nothing more to read. Time
1674 return; /* huh? we should never get here */
1677 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
1678 csp->ip_addr_str, http->ocmd, byte_count);
1682 /*********************************************************************
1686 * Description : This is little more than chat. We only "serve" to
1687 * to close any socket that chat may have opened.
1690 * 1 : csp = Current client state (buffers, headers, etc...)
1694 *********************************************************************/
1696 void serve(struct client_state *csp)
1697 #else /* ifndef AMIGA */
1698 static void serve(struct client_state *csp)
1699 #endif /* def AMIGA */
1702 close_socket(csp->cfd);
1704 if (csp->sfd != JB_INVALID_SOCKET)
1706 close_socket(csp->sfd);
1709 csp->flags &= ~CSP_FLAG_ACTIVE;
1715 /*********************************************************************
1717 * Function : server_thread
1719 * Description : We only exist to call `serve' in a threaded environment.
1722 * 1 : data = Current client state (buffers, headers, etc...)
1724 * Returns : Always 0.
1726 *********************************************************************/
1727 static int32 server_thread(void *data)
1729 serve((struct client_state *) data);
1736 /*********************************************************************
1740 * Description : Print usage info & exit.
1742 * Parameters : Pointer to argv[0] for identifying ourselves
1746 *********************************************************************/
1747 void usage(const char *myname)
1749 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
1750 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
1751 "Aborting.\n", myname);
1758 /*********************************************************************
1762 * Description : Load the config file and start the listen loop.
1763 * This function is a lot more *sane* with the `load_config'
1764 * and `listen_loop' functions; although it stills does
1765 * a *little* too much for my taste.
1768 * 1 : argc = Number of parameters (including $0).
1769 * 2 : argv = Array of (char *)'s to the parameters.
1771 * Returns : 1 if : can't open config file, unrecognized directive,
1772 * stats requested in multi-thread mode, can't open the
1773 * log file, can't open the jar file, listen port is invalid,
1774 * any load fails, and can't bind port.
1776 * Else main never returns, the process must be signaled
1777 * to terminate execution. Or, on Windows, use the
1778 * "File", "Exit" menu option.
1780 *********************************************************************/
1782 int real_main(int argc, const char *argv[])
1784 int main(int argc, const char *argv[])
1789 struct passwd *pw = NULL;
1790 struct group *grp = NULL;
1799 #if !defined(_WIN32)
1807 * Parse the command line arguments
1809 while (++argc_pos < argc)
1811 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1813 if (strcmp(argv[argc_pos], "--help") == 0)
1818 else if(strcmp(argv[argc_pos], "--version") == 0)
1820 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
1824 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
1829 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
1831 if (++argc_pos == argc) usage(argv[0]);
1832 pidfile = strdup(argv[argc_pos]);
1835 else if (strcmp(argv[argc_pos], "--user" ) == 0)
1837 if (++argc_pos == argc) usage(argv[argc_pos]);
1839 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
1842 if (NULL == (grp = getgrnam(p)))
1844 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
1848 if (NULL == (pw = getpwnam(argv[argc_pos])))
1850 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
1853 if (p != NULL) *--p = '\0';
1856 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
1860 #endif /* defined(unix) */
1862 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
1864 configfile = argv[argc_pos];
1867 } /* -END- while (more arguments) */
1870 if ( *configfile != '/' )
1872 char *abs_file, cwd[1024];
1874 /* make config-filename absolute here */
1875 if ( !(getcwd(cwd, sizeof(cwd))))
1877 perror("get working dir failed");
1881 if (!(basedir = strdup(cwd))
1882 || (!(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))))
1884 perror("malloc failed");
1887 strcpy( abs_file, basedir );
1888 strcat( abs_file, "/" );
1889 strcat( abs_file, configfile );
1890 configfile = abs_file;
1892 #endif /* defined unix */
1896 clients->next = NULL;
1900 #elif defined(_WIN32)
1906 * Prepare global mutex semaphores
1908 pthread_mutex_init(&gmtime_mutex,0);
1909 pthread_mutex_init(&localtime_mutex,0);
1910 pthread_mutex_init(&gethostbyaddr_mutex,0);
1911 pthread_mutex_init(&gethostbyname_mutex,0);
1912 #endif /* def OSX_DARWIN */
1915 * Unix signal handling
1917 * Catch the abort, interrupt and terminate signals for a graceful exit
1918 * Catch the hangup signal so the errlog can be reopened.
1919 * Ignore the broken pipe signals (FIXME: Why?)
1921 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1924 const int catched_signals[] = { SIGABRT, SIGTERM, SIGINT, SIGHUP, 0 };
1925 const int ignored_signals[] = { SIGPIPE, 0 };
1927 for (idx = 0; catched_signals[idx] != 0; idx++)
1929 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
1931 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
1935 for (idx = 0; ignored_signals[idx] != 0; idx++)
1937 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
1939 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
1944 #else /* ifdef _WIN32 */
1945 # ifdef _WIN_CONSOLE
1947 * We *are* in a windows console app.
1948 * Print a verbose messages about FAQ's and such
1950 printf(win32_blurb);
1951 # endif /* def _WIN_CONSOLE */
1952 #endif /* def _WIN32 */
1955 /* Initialize the CGI subsystem */
1956 cgi_init_error_messages();
1959 * If runnig on unix and without the --nodaemon
1960 * option, become a daemon. I.e. fork, detach
1961 * from tty and get process group leadership
1974 if ( pid < 0 ) /* error */
1979 else if ( pid != 0 ) /* parent */
1984 * must check for errors
1985 * child died due to missing files aso
1988 wpid = waitpid( pid, &status, WNOHANG );
1997 /* Should be more portable, but not as well tested */
2002 #else /* ndef __FreeBSD__ */
2004 #endif /* ndef __FreeBSD__ */
2005 fd = open("/dev/tty", O_RDONLY);
2008 /* no error check here */
2009 ioctl( fd, TIOCNOTTY,0 );
2013 /* FIXME: should close stderr (fd 2) here too, but the test
2015 * and load config file is done in listen_loop() and puts
2016 * some messages on stderr there.
2023 } /* -END- if (!no_daemon) */
2026 * As soon as we have written the PID file, we can switch
2027 * to the user and group ID indicated by the --user option
2033 if (((NULL != grp) && setgid(grp->gr_gid)) || (setgid(pw->pw_gid)))
2035 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
2041 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
2043 if (chroot(pw->pw_dir) < 0)
2045 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
2049 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
2052 if (setuid(pw->pw_uid))
2054 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
2058 char putenv_dummy[64];
2060 strcpy(putenv_dummy, "HOME=/");
2061 if (putenv(putenv_dummy) != 0)
2063 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
2066 snprintf(putenv_dummy, 64, "USER=%s", pw->pw_name);
2067 if (putenv(putenv_dummy) != 0)
2069 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
2075 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
2078 #endif /* defined unix */
2088 /*********************************************************************
2090 * Function : bind_port_helper
2092 * Description : Bind the listen port. Handles logging, and aborts
2096 * 1 : config = Privoxy configuration. Specifies port
2099 * Returns : Port that was opened.
2101 *********************************************************************/
2102 static jb_socket bind_port_helper(struct configuration_spec * config)
2107 if ( (config->haddr != NULL)
2108 && (config->haddr[0] == '1')
2109 && (config->haddr[1] == '2')
2110 && (config->haddr[2] == '7')
2111 && (config->haddr[3] == '.') )
2113 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
2116 else if (config->haddr == NULL)
2118 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
2123 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
2124 config->hport, config->haddr);
2127 result = bind_port(config->haddr, config->hport, &bfd);
2134 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2135 "There may be another Privoxy or some other "
2136 "proxy running on port %d",
2137 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
2138 config->hport, config->hport);
2141 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2142 "The hostname is not resolvable",
2143 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2146 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
2147 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2150 /* shouldn't get here */
2151 return JB_INVALID_SOCKET;
2154 config->need_bind = 0;
2160 /*********************************************************************
2162 * Function : listen_loop
2164 * Description : bind the listen port and enter a "FOREVER" listening loop.
2170 *********************************************************************/
2171 static void listen_loop(void)
2173 struct client_state *csp = NULL;
2175 struct configuration_spec * config;
2177 config = load_config();
2179 bfd = bind_port_helper(config);
2181 #ifdef FEATURE_GRACEFUL_TERMINATION
2182 while (!g_terminate)
2187 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
2188 while (waitpid(-1, NULL, WNOHANG) > 0)
2190 /* zombie children */
2192 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
2195 * Free data that was used by died threads
2201 * Re-open the errlog after HUP signal
2203 if (received_hup_signal)
2205 init_error_log(Argv[0], config->logfile, config->debug);
2206 received_hup_signal = 0;
2211 #ifdef FEATURE_COOKIE_JAR
2213 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
2214 * already open. I think unload_configfile() is not being run, which should do
2215 * this work. Until that can get resolved, we'll use this workaround.
2219 if (csp->config->jar)
2221 fclose(csp->config->jar);
2222 csp->config->jar = NULL;
2224 #endif /* FEATURE_COOKIE_JAR */
2225 #endif /* __OS2__ */
2227 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
2229 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
2233 csp->flags |= CSP_FLAG_ACTIVE;
2234 csp->sfd = JB_INVALID_SOCKET;
2236 csp->config = config = load_config();
2238 if ( config->need_bind )
2241 * Since we were listening to the "old port", we will not see
2242 * a "listen" param change until the next IJB request. So, at
2243 * least 1 more request must be made for us to find the new
2244 * setting. I am simply closing the old socket and binding the
2247 * Which-ever is correct, we will serve 1 more page via the
2248 * old settings. This should probably be a "show-proxy-args"
2249 * request. This should not be a so common of an operation
2250 * that this will hurt people's feelings.
2255 bfd = bind_port_helper(config);
2258 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
2260 if (!accept_connection(csp, bfd))
2262 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
2275 log_error(LOG_LEVEL_CONNECT, "OK");
2278 #ifdef FEATURE_TOGGLE
2279 if (global_toggle_state)
2281 csp->flags |= CSP_FLAG_TOGGLED_ON;
2283 #endif /* def FEATURE_TOGGLE */
2285 if (run_loader(csp))
2287 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
2288 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2292 if (block_acl(NULL,csp))
2294 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
2295 close_socket(csp->cfd);
2299 #endif /* def FEATURE_ACL */
2301 /* add it to the list of clients */
2302 csp->next = clients->next;
2303 clients->next = csp;
2305 if (config->multi_threaded)
2309 /* this is a switch () statment in the C preprocessor - ugh */
2310 #undef SELECTED_ONE_OPTION
2312 /* Use Pthreads in preference to native code */
2313 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
2314 #define SELECTED_ONE_OPTION
2316 pthread_t the_thread;
2317 pthread_attr_t attrs;
2319 pthread_attr_init(&attrs);
2320 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
2321 errno = pthread_create(&the_thread, &attrs,
2323 child_id = errno ? -1 : 0;
2324 pthread_attr_destroy(&attrs);
2328 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
2329 #define SELECTED_ONE_OPTION
2330 child_id = _beginthread(
2331 (void (*)(void *))serve,
2336 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
2337 #define SELECTED_ONE_OPTION
2338 child_id = _beginthread(
2339 (void(* _Optlink)(void*))serve,
2345 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
2346 #define SELECTED_ONE_OPTION
2348 thread_id tid = spawn_thread
2349 (server_thread, "server", B_NORMAL_PRIORITY, csp);
2351 if ((tid >= 0) && (resume_thread(tid) == B_OK))
2353 child_id = (int) tid;
2362 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2363 #define SELECTED_ONE_OPTION
2364 csp->cfd = ReleaseSocket(csp->cfd, -1);
2366 if((child_id = (int)CreateNewProcTags(
2367 NP_Entry, (ULONG)server_thread,
2368 NP_Output, Output(),
2369 NP_CloseOutput, FALSE,
2370 NP_Name, (ULONG)"privoxy child",
2371 NP_StackSize, 200*1024,
2375 ((struct Task *)child_id)->tc_UserData = csp;
2376 Signal((struct Task *)child_id, SIGF_SINGLE);
2381 #if !defined(SELECTED_ONE_OPTION)
2384 /* This block is only needed when using fork().
2385 * When using threads, the server thread was
2386 * created and run by the call to _beginthread().
2388 if (child_id == 0) /* child */
2391 #ifdef FEATURE_TOGGLE
2392 int inherited_toggle_state = global_toggle_state;
2393 #endif /* def FEATURE_TOGGLE */
2398 * If we've been toggled or we've blocked the request, tell Mom
2401 #ifdef FEATURE_TOGGLE
2402 if (inherited_toggle_state != global_toggle_state)
2404 rc |= RC_FLAG_TOGGLED;
2406 #endif /* def FEATURE_TOGGLE */
2408 #ifdef FEATURE_STATISTICS
2409 if (csp->flags & CSP_FLAG_REJECTED)
2411 rc |= RC_FLAG_BLOCKED;
2413 #endif /* ndef FEATURE_STATISTICS */
2417 else if (child_id > 0) /* parent */
2419 /* in a fork()'d environment, the parent's
2420 * copy of the client socket and the CSP
2424 #if !defined(_WIN32) && !defined(__CYGWIN__)
2426 wait( &child_status );
2429 * Evaluate child's return code: If the child has
2430 * - been toggled, toggle ourselves
2431 * - blocked its request, bump up the stats counter
2434 #ifdef FEATURE_TOGGLE
2435 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
2437 global_toggle_state = !global_toggle_state;
2439 #endif /* def FEATURE_TOGGLE */
2441 #ifdef FEATURE_STATISTICS
2443 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
2447 #endif /* def FEATURE_STATISTICS */
2449 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
2450 close_socket(csp->cfd);
2451 csp->flags &= ~CSP_FLAG_ACTIVE;
2455 #undef SELECTED_ONE_OPTION
2456 /* end of cpp switch () */
2458 if (child_id < 0) /* failed */
2460 char buf[BUFFER_SIZE];
2462 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
2464 sprintf(buf , "Privoxy: can't fork: errno = %d", errno);
2466 write_socket(csp->cfd, buf, strlen(buf));
2467 close_socket(csp->cfd);
2468 csp->flags &= ~CSP_FLAG_ACTIVE;
2479 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
2481 /* Clean up. Aim: free all memory (no leaks) */
2482 #ifdef FEATURE_GRACEFUL_TERMINATION
2484 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
2486 unload_current_config_file();
2487 unload_current_actions_file();
2488 unload_current_re_filterfile();
2489 #ifdef FEATURE_TRUST
2490 unload_current_trust_file();
2493 if (config->multi_threaded)
2500 } while ((clients->next != NULL) && (--i > 0));
2504 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
2515 #ifdef FEATURE_COOKIE_JAR
2516 if (NULL != config->jar)
2518 fclose(config->jar);
2522 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
2523 /* Cleanup - remove taskbar icon etc. */
2528 #endif /* FEATURE_GRACEFUL_TERMINATION */