1 const char jcc_rcs[] = "$Id: jcc.c,v 1.92.2.13 2003/11/27 19:20:27 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 1.92.2.13 2003/11/27 19:20:27 oes
37 * Diagnostics: Now preserve the returncode of pthread_create
38 * in errno. Closes BR #775721. Thanks to Geoffrey Hausheer.
40 * Revision 1.92.2.12 2003/07/11 11:34:19 oes
41 * No longer ignore SIGCHLD. Fixes bug #769381
43 * Revision 1.92.2.11 2003/05/14 12:32:02 oes
44 * Close jarfile on graceful exit, remove stray line
46 * Revision 1.92.2.10 2003/05/08 15:13:46 oes
47 * Cosmetics: Killed a warning, a typo and an allocation left at exit
49 * Revision 1.92.2.9 2003/04/03 15:08:42 oes
50 * No longer rely on non-POSIX.1 extensions of getcwd().
53 * Revision 1.92.2.8 2003/03/31 13:12:32 oes
54 * Replaced setenv() by posix-compliant putenv()
55 * Thanks to Neil McCalden (nmcc AT users.sf.net).
57 * Revision 1.92.2.7 2003/03/17 16:48:59 oes
58 * Added chroot ability, thanks to patch by Sviatoslav Sviridov
60 * Revision 1.92.2.6 2003/03/11 11:55:00 oes
61 * Clean-up and extension of improvements for forked mode:
62 * - Child's return code now consists of flags RC_FLAG_*
63 * - Reporting toggle to parent now properly #ifdef'ed
64 * - Children now report blocking to parent. This enables
65 * statistics in forked mode
67 * Revision 1.92.2.5 2003/03/10 23:45:32 oes
68 * Fixed bug #700381: Non-Threaded version now capable of being toggled.
69 * Children now report having been toggled through _exit(17), parents
70 * watch for that code and toggle themselves if found.
72 * Revision 1.92.2.4 2003/03/07 03:41:04 david__schmidt
73 * 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.
75 * Revision 1.92.2.3 2003/02/28 12:53:06 oes
76 * Fixed two mostly harmless mem leaks
78 * Revision 1.92.2.2 2002/11/20 14:37:47 oes
79 * Fix: Head of global clients list now initialized to NULL
81 * Revision 1.92.2.1 2002/09/25 14:52:24 oes
82 * Added basic support for OPTIONS and TRACE HTTP methods:
83 * - New interceptor direct_response() added in chat().
84 * - sed() moved to earlier in the process, so that the
85 * Host: header is evaluated before actions and forwarding
88 * Revision 1.92 2002/05/08 16:00:46 oes
89 * Chat's buffer handling:
90 * - Fixed bug with unchecked out-of-mem conditions
91 * while reading client request & server headers
92 * - No longer predict if the buffer limit will be exceeded
93 * in the next read -- check add_to_iob's new
94 * return code. If buffer couldn't be extended
95 * (policy or out-of-mem) while
96 * - reading from client: abort
97 * - reading server headers: send error page
98 * - buffering server body for filter: flush,
99 * and if that fails: send error page
101 * Revision 1.91 2002/04/08 20:35:58 swa
104 * Revision 1.90 2002/04/02 14:57:28 oes
105 * Made sending wafers independent of FEATURE_COOKIE_JAR
107 * Revision 1.89 2002/03/31 17:18:59 jongfoster
108 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
110 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
111 * More compiler warning message maintenance
113 * Revision 1.87 2002/03/26 22:29:54 swa
114 * we have a new homepage!
116 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
117 * Workaround for closing the jarfile before load_config() comes around again
119 * Revision 1.85 2002/03/24 15:23:33 jongfoster
122 * Revision 1.84 2002/03/24 13:25:43 swa
123 * name change related issues
125 * Revision 1.83 2002/03/16 23:54:06 jongfoster
126 * Adding graceful termination feature, to help look for memory leaks.
127 * If you enable this (which, by design, has to be done by hand
128 * editing config.h) and then go to http://i.j.b/die, then the program
129 * will exit cleanly after the *next* request. It should free all the
130 * memory that was used.
132 * Revision 1.82 2002/03/13 00:27:05 jongfoster
135 * Revision 1.81 2002/03/12 01:42:50 oes
136 * Introduced modular filters
138 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
139 * OS/2 port maintenance:
140 * - Fixed EMX build - it had decayed a little
141 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
142 * substituted a memset for now.
144 * Revision 1.79 2002/03/09 20:03:52 jongfoster
145 * - Making various functions return int rather than size_t.
146 * (Undoing a recent change). Since size_t is unsigned on
147 * Windows, functions like read_socket that return -1 on
148 * error cannot return a size_t.
150 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
151 * crashes, and also frequently caused JB to jump to 100%
152 * CPU and stay there. (Because it thought it had just
153 * read ((unsigned)-1) == 4Gb of data...)
155 * - The signature of write_socket has changed, it now simply
156 * returns success=0/failure=nonzero.
158 * - Trying to get rid of a few warnings --with-debug on
159 * Windows, I've introduced a new type "jb_socket". This is
160 * used for the socket file descriptors. On Windows, this
161 * is SOCKET (a typedef for unsigned). Everywhere else, it's
162 * an int. The error value can't be -1 any more, so it's
163 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
164 * Windows it maps to the #define INVALID_SOCKET.)
166 * - The signature of bind_port has changed.
168 * Revision 1.78 2002/03/08 21:35:04 oes
169 * Added optional group supplement to --user option. Will now use default group of user if no group given
171 * Revision 1.77 2002/03/07 03:52:06 oes
172 * - Fixed compiler warnings etc
173 * - Improved handling of failed DNS lookups
175 * Revision 1.76 2002/03/06 22:54:35 jongfoster
176 * Automated function-comment nitpicking.
178 * Revision 1.75 2002/03/06 10:02:19 oes
179 * Fixed stupid bug when --user was not given
181 * Revision 1.74 2002/03/06 00:49:31 jongfoster
182 * Fixing warning on Windows
183 * Making #ifdefs that refer to the same variable consistently
184 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
186 * Revision 1.73 2002/03/05 23:57:30 hal9
187 * Stray character 's' on line 1618 was breaking build.
189 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
190 * - Re-enable OS/2 building after new parms were added
191 * - Fix false out of memory report when resolving CGI templates when no IP
192 * address is available of failed attempt (a la no such domain)
194 * Revision 1.71 2002/03/05 18:13:56 oes
195 * Added --user option
197 * Revision 1.70 2002/03/05 04:52:42 oes
198 * Deleted non-errlog debugging code
200 * Revision 1.69 2002/03/04 23:50:00 jongfoster
201 * Splitting off bind_port() call into bind_port_helper(), with
204 * Revision 1.68 2002/03/04 20:17:32 oes
207 * Revision 1.67 2002/03/04 18:18:57 oes
208 * - Removed _DEBUG mode
209 * - Cleand up cmdline parsing
210 * - Introduced --no-daemon, --pidfile options
211 * - Cleaned up signal handling:
212 * - Terminate cleanly on INT, TERM and ABRT
213 * - Schedule logfile for re-opening on HUP
214 * - Ignore CHLD and PIPE
215 * - Leave the rest with their default handlers
216 * - Uniform handler registration
217 * - Added usage() function
218 * - Played styleguide police
220 * Revision 1.66 2002/03/03 15:06:55 oes
221 * Re-enabled automatic config reloading
223 * Revision 1.65 2002/03/03 14:49:11 oes
224 * Fixed CLF logging: Now uses client's original HTTP request
226 * Revision 1.64 2002/03/03 09:18:03 joergs
227 * Made jumbjuster work on AmigaOS again.
229 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
230 * Clean up a little CRLF unpleasantness that suddenly appeared
232 * Revision 1.62 2002/02/20 23:17:23 jongfoster
233 * Detecting some out-of memory conditions and exiting with a log message.
235 * Revision 1.61 2002/01/17 21:01:52 jongfoster
236 * Moving all our URL and URL pattern parsing code to urlmatch.c.
238 * Revision 1.60 2001/12/30 14:07:32 steudten
239 * - Add signal handling (unix)
240 * - Add SIGHUP handler (unix)
241 * - Add creation of pidfile (unix)
242 * - Add action 'top' in rc file (RH)
243 * - Add entry 'SIGNALS' to manpage
244 * - Add exit message to logfile (unix)
246 * Revision 1.59 2001/12/13 14:07:18 oes
247 * Fixed Bug: 503 error page now sent OK
249 * Revision 1.58 2001/11/30 23:37:24 jongfoster
250 * Renaming the Win32 config file to config.txt - this is almost the
251 * same as the corresponding UNIX name "config"
253 * Revision 1.57 2001/11/16 00:47:43 jongfoster
254 * Changing the tty-disconnection code to use setsid().
256 * Revision 1.56 2001/11/13 20:20:54 jongfoster
257 * Tabs->spaces, fixing a bug with missing {} around an if()
259 * Revision 1.55 2001/11/13 20:14:53 jongfoster
260 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
262 * Revision 1.54 2001/11/07 00:03:14 steudten
263 * Give reliable return value if an error
264 * occurs not just 0 with new daemon mode.
266 * Revision 1.53 2001/11/05 21:41:43 steudten
267 * Add changes to be a real daemon just for unix os.
268 * (change cwd to /, detach from controlling tty, set
269 * process group and session leader to the own process.
271 * Add some fatal-error log message for failed malloc().
272 * Add '-d' if compiled with 'configure --with-debug' to
273 * enable debug output.
275 * Revision 1.52 2001/10/26 20:11:20 jongfoster
276 * Fixing type mismatch
278 * Revision 1.51 2001/10/26 17:38:28 oes
281 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
282 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
283 * threads to call select() simultaneously. So, it's time to do a real, live,
284 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
285 * (native). Both versions will work, but using __OS2__ offers multi-threading.
287 * Revision 1.49 2001/10/23 21:41:35 jongfoster
288 * Added call to initialize the (statically-allocated of course)
289 * "out of memory" CGI response.
291 * Revision 1.48 2001/10/10 19:56:46 jongfoster
292 * Moving some code that wasn't cookie-related out of an #ifdef
295 * Revision 1.47 2001/10/10 16:44:36 oes
296 * Added CONNECT destination port limitation check
298 * Revision 1.46 2001/10/08 15:17:41 oes
299 * Re-enabled SSL forwarding
301 * Revision 1.45 2001/10/07 15:42:11 oes
302 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
304 * Moved downgrading of the HTTP version from parse_http_request to
305 * chat(), since we can't decide if it is necessary before we have
306 * determined the actions for the URL. The HTTP command is now
307 * *always* re-built so the repairs need no longer be special-cased.
309 * filter_popups now gets a csp pointer so it can raise the new
310 * CSP_FLAG_MODIFIED flag.
314 * Added configurable size limit for the IOB. If the IOB grows so
315 * large that the next read would exceed the limit, the header
316 * is generated, and the header & unfiltered buffer are flushed
317 * to the client. Chat then continues in non-buffering,
318 * non-filtering body mode.
320 * Revision 1.44 2001/10/02 18:13:57 oes
323 * Revision 1.43 2001/10/02 15:32:13 oes
324 * Moved generation of hdr
326 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
327 * Cleaning up 2 compiler warnings on OS/2.
329 * Revision 1.41 2001/09/16 17:05:14 jongfoster
330 * Removing unused #include showarg.h
332 * Revision 1.40 2001/09/16 15:41:45 jongfoster
333 * Fixing signed/unsigned comparison warning.
335 * Revision 1.39 2001/09/16 13:21:27 jongfoster
336 * Changes to use new list functions.
338 * Revision 1.38 2001/09/16 13:01:46 jongfoster
339 * Removing redundant function call that zeroed zalloc()'d memory.
341 * Revision 1.37 2001/09/10 11:12:24 oes
342 * Deleted unused variable
344 * Revision 1.36 2001/09/10 10:56:15 oes
345 * Silenced compiler warnings
347 * Revision 1.35 2001/07/31 14:44:22 oes
348 * Deleted unused size parameter from filter_popups()
350 * Revision 1.34 2001/07/30 22:08:36 jongfoster
351 * Tidying up #defines:
352 * - All feature #defines are now of the form FEATURE_xxx
353 * - Permanently turned off WIN_GUI_EDIT
354 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
356 * Revision 1.33 2001/07/29 19:32:00 jongfoster
357 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
359 * Revision 1.32 2001/07/29 18:47:05 jongfoster
360 * Adding missing #include "loadcfg.h"
362 * Revision 1.31 2001/07/29 12:17:48 oes
363 * Applied pthread fix by Paul Lieverse
365 * Revision 1.30 2001/07/25 22:57:13 jongfoster
366 * __BEOS__ no longer overrides FEATURE_PTHREAD.
367 * This is because FEATURE_PTHREAD will soon be widely used, so I
368 * want to keep it simple.
370 * Revision 1.29 2001/07/24 12:47:06 oes
371 * Applied BeOS support update by Eugenia
373 * Revision 1.28 2001/07/23 13:26:12 oes
374 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
376 * Revision 1.27 2001/07/19 19:09:47 haroon
377 * - Added code to take care of the situation where while processing the first
378 * server response (which includes the server header), after finding the end
379 * of the headers we were not looking past the end of the headers for
380 * content modification. I enabled it for filter_popups.
381 * Someone else should look to see if other similar operations should be
382 * done to the discarded portion of the buffer.
384 * Note 2001/07/20: No, the other content modification mechanisms will process
385 * the whole iob later anyway. --oes
387 * Revision 1.26 2001/07/18 12:31:36 oes
390 * Revision 1.25 2001/07/15 19:43:49 jongfoster
391 * Supports POSIX threads.
392 * Also removed some unused #includes.
394 * Revision 1.24 2001/07/13 14:00:40 oes
395 * - Generic content modification scheme:
396 * Each feature has its own applicability flag that is set
397 * from csp->action->flags.
398 * Replaced the "filtering" int flag , by a function pointer
399 * "content_filter" to the function that will do the content
400 * modification. If it is != NULL, the document will be buffered
401 * and processed through *content_filter, which must set
402 * csp->content_length and return a modified copy of the body
403 * or return NULL (on failiure).
404 * - Changed csp->is_text to the more generic bitmap csp->content_type
405 * which can currently take the valued CT_TEXT or CT_GIF
407 * - Removed all #ifdef PCRS
409 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
410 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
411 * the `block_acl' call. This prevents a compilation error when the user
412 * does not wish to use the "ACL" feature.
414 * Revision 1.22 2001/06/29 21:45:41 oes
415 * Indentation, CRLF->LF, Tab-> Space
417 * Revision 1.21 2001/06/29 13:29:36 oes
418 * - Cleaned up, improved comments
419 * - Unified all possible interceptors (CGI,
420 * block, trust, fast_redirect) in one
421 * place, with one (CGI) answer generation
422 * mechansim. Much clearer now.
423 * - Removed the GIF image generation, which
424 * is now done in filters.c:block_url()
425 * - Made error conditions like domain lookup
426 * failiure or (various) problems while talking
427 * to the server use cgi.c:error_response()
428 * instead of generating HTML/HTTP in chat() (yuck!)
429 * - Removed logentry from cancelled commit
431 * Revision 1.20 2001/06/09 10:55:28 jongfoster
432 * Changing BUFSIZ ==> BUFFER_SIZE
434 * Revision 1.19 2001/06/07 23:12:52 jongfoster
435 * Replacing function pointer in struct gateway with a directly
436 * called function forwarded_connect().
437 * Replacing struct gateway with struct forward_spec
439 * Revision 1.18 2001/06/03 19:12:16 oes
440 * introduced new cgi handling
442 * Revision 1.17 2001/06/01 20:07:23 jongfoster
443 * Now uses action +image-blocker{} rather than config->tinygif
445 * Revision 1.16 2001/06/01 18:49:17 jongfoster
446 * Replaced "list_share" with "list" - the tiny memory gain was not
447 * worth the extra complexity.
449 * Revision 1.15 2001/05/31 21:24:47 jongfoster
450 * Changed "permission" to "action" throughout.
451 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
452 * Moved vanilla wafer check into chat(), since we must now
453 * decide whether or not to add it based on the URL.
455 * Revision 1.14 2001/05/29 20:14:01 joergs
456 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
459 * Revision 1.13 2001/05/29 09:50:24 jongfoster
460 * Unified blocklist/imagelist/permissionslist.
461 * File format is still under discussion, but the internal changes
464 * Also modified interceptor behaviour:
465 * - We now intercept all URLs beginning with one of the following
466 * prefixes (and *only* these prefixes):
468 * * http://ijbswa.sf.net/config/
469 * * http://ijbswa.sourceforge.net/config/
470 * - New interceptors "home page" - go to http://i.j.b/ to see it.
471 * - Internal changes so that intercepted and fast redirect pages
472 * are not replaced with an image.
473 * - Interceptors now have the option to send a binary page direct
474 * to the client. (i.e. ijb-send-banner uses this)
475 * - Implemented show-url-info interceptor. (Which is why I needed
476 * the above interceptors changes - a typical URL is
477 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
478 * The previous mechanism would not have intercepted that, and
479 * if it had been intercepted then it then it would have replaced
482 * Revision 1.12 2001/05/27 22:17:04 oes
484 * - re_process_buffer no longer writes the modified buffer
485 * to the client, which was very ugly. It now returns the
486 * buffer, which it is then written by chat.
488 * - content_length now adjusts the Content-Length: header
489 * for modified documents rather than crunch()ing it.
490 * (Length info in csp->content_length, which is 0 for
491 * unmodified documents)
493 * - For this to work, sed() is called twice when filtering.
495 * Revision 1.11 2001/05/26 17:27:53 jongfoster
496 * Added support for CLF and fixed LOG_LEVEL_LOG.
497 * Also did CRLF->LF fix of my previous patch.
499 * Revision 1.10 2001/05/26 15:26:15 jongfoster
500 * ACL feature now provides more security by immediately dropping
501 * connections from untrusted hosts.
503 * Revision 1.9 2001/05/26 00:28:36 jongfoster
504 * Automatic reloading of config file.
505 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
506 * Most of the global variables have been moved to a new
507 * struct configuration_spec, accessed through csp->config->globalname
508 * Most of the globals remaining are used by the Win32 GUI.
510 * Revision 1.8 2001/05/25 22:43:18 jongfoster
511 * Fixing minor memory leak and buffer overflow.
513 * Revision 1.7 2001/05/25 22:34:30 jongfoster
516 * Revision 1.6 2001/05/23 00:13:58 joergs
517 * AmigaOS support fixed.
519 * Revision 1.5 2001/05/22 18:46:04 oes
521 * - Enabled filtering banners by size rather than URL
522 * by adding patterns that replace all standard banner
523 * sizes with the "Junkbuster" gif to the re_filterfile
525 * - Enabled filtering WebBugs by providing a pattern
526 * which kills all 1x1 images
528 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
529 * which is selected by the (nonstandard and therefore
530 * capital) letter 'U' in the option string.
531 * It causes the quantifiers to be ungreedy by default.
532 * Appending a ? turns back to greedy (!).
534 * - Added a new interceptor ijb-send-banner, which
535 * sends back the "Junkbuster" gif. Without imagelist or
536 * MSIE detection support, or if tinygif = 1, or the
537 * URL isn't recognized as an imageurl, a lame HTML
538 * explanation is sent instead.
540 * - Added new feature, which permits blocking remote
541 * script redirects and firing back a local redirect
543 * The feature is conditionally compiled, i.e. it
544 * can be disabled with --disable-fast-redirects,
545 * plus it must be activated by a "fast-redirects"
546 * line in the config file, has its own log level
547 * and of course wants to be displayed by show-proxy-args
548 * Note: Boy, all the #ifdefs in 1001 locations and
549 * all the fumbling with configure.in and acconfig.h
550 * were *way* more work than the feature itself :-(
552 * - Because a generic redirect template was needed for
553 * this, tinygif = 3 now uses the same.
555 * - Moved GIFs, and other static HTTP response templates
560 * - Removed some >400 CRs again (Jon, you really worked
563 * Revision 1.4 2001/05/21 19:34:01 jongfoster
564 * Made failure to bind() a fatal error.
566 * Revision 1.3 2001/05/20 01:21:20 jongfoster
567 * Version 2.9.4 checkin.
568 * - Merged popupfile and cookiefile, and added control over PCRS
569 * filtering, in new "permissionsfile".
570 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
571 * file error you now get a message box (in the Win32 GUI) rather
572 * than the program exiting with no explanation.
573 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
575 * - Removed tabs from "config"
576 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
577 * - Bumped up version number.
579 * Revision 1.2 2001/05/17 22:34:44 oes
580 * - Added hint on GIF char array generation to jcc.c
581 * - Cleaned CRLF's from the sources and related files
582 * - Repaired logging for REF and FRC
584 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
585 * Initial import of version 2.9.3 source tree
588 *********************************************************************/
594 #include <sys/types.h>
601 #ifdef FEATURE_PTHREAD
603 #endif /* def FEATURE_PTHREAD */
606 # ifndef FEATURE_PTHREAD
610 # include <windows.h>
611 # include <process.h>
612 # endif /* ndef FEATURE_PTHREAD */
615 # ifndef _WIN_CONSOLE
617 # endif /* ndef _WIN_CONSOLE */
619 #else /* ifndef _WIN32 */
621 # if !defined (__OS2__)
623 # include <sys/wait.h>
624 # endif /* ndef __OS2__ */
625 # include <sys/time.h>
626 # include <sys/stat.h>
627 # include <sys/ioctl.h>
630 #include <sys/termios.h>
641 # include <socket.h> /* BeOS has select() for sockets only. */
642 # include <OS.h> /* declarations for threads and stuff. */
645 # if defined(__EMX__) || defined(__OS2__)
646 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
651 #define bzero(B,N) memset(B,0x00,n)
666 #include "killpopup.h"
667 #include "miscutil.h"
669 #include "jbsockets.h"
674 #include "urlmatch.h"
676 const char jcc_h_rcs[] = JCC_H_VERSION;
677 const char project_h_rcs[] = PROJECT_H_VERSION;
680 struct client_state clients[1];
681 struct file_list files[1];
683 #ifdef FEATURE_STATISTICS
684 int urls_read = 0; /* total nr of urls read inc rejected */
685 int urls_rejected = 0; /* total nr of urls rejected */
686 #endif /* def FEATURE_STATISTICS */
688 #ifdef FEATURE_GRACEFUL_TERMINATION
692 static void listen_loop(void);
693 static void chat(struct client_state *csp);
695 void serve(struct client_state *csp);
696 #else /* ifndef AMIGA */
697 static void serve(struct client_state *csp);
698 #endif /* def AMIGA */
701 static int32 server_thread(void *data);
702 #endif /* def __BEOS__ */
705 #define sleep(N) Sleep(((N) * 1000))
709 #define sleep(N) DosSleep(((N) * 100))
714 * Hit OSX over the head with a hammer. Protect all *_r functions.
716 pthread_mutex_t gmtime_mutex;
717 pthread_mutex_t localtime_mutex;
718 pthread_mutex_t gethostbyaddr_mutex;
719 pthread_mutex_t gethostbyname_mutex;
720 #endif /* def OSX_DARWIN */
722 #if defined(unix) || defined(__EMX__)
723 const char *basedir = NULL;
724 const char *pidfile = NULL;
725 int received_hup_signal = 0;
726 #endif /* defined unix */
728 /* The vanilla wafer. */
729 static const char VANILLA_WAFER[] =
730 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
731 "Do_not_send_me_any_copyrighted_information_other_than_the_"
732 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
733 "In_particular_do_not_send_me_any_cookies_that_"
734 "are_subject_to_a_claim_of_copyright_by_anybody._"
735 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
736 "(copyright_or_otherwise)_applying_to_any_cookie._";
739 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
740 /*********************************************************************
742 * Function : sig_handler
744 * Description : Signal handler for different signals.
745 * Exit gracefully on ABRT, TERM and INT
746 * or set a flag that will cause the errlog
747 * to be reopened by the main thread on HUP.
750 * 1 : the_signal = the signal cause this function to call
754 *********************************************************************/
755 static void sig_handler(int the_signal)
762 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
770 received_hup_signal = 1;
775 * We shouldn't be here, unless we catch signals
776 * in main() that we can't handle here!
778 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
786 /*********************************************************************
790 * Description : Once a connection to the client has been accepted,
791 * this function is called (via serve()) to handle the
792 * main business of the communication. When this
793 * function returns, the caller must close the client
797 * 1 : csp = Current client state (buffers, headers, etc...)
799 * Returns : On success, the number of bytes written are returned (zero
800 * indicates nothing was written). On error, -1 is returned,
801 * and errno is set appropriately. If count is zero and the
802 * file descriptor refers to a regular file, 0 will be
803 * returned without causing any other effect. For a special
804 * file, the results are not portable.
806 *********************************************************************/
807 static void chat(struct client_state *csp)
810 * This next lines are a little ugly, but they simplifies the if statements
811 * below. Basically if TOGGLE, then we want the if to test if the
812 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
813 * then we want the if to test for CSP_FLAG_FORCED , else we don't
815 #ifdef FEATURE_TOGGLE
816 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
817 #else /* ifndef FEATURE_TOGGLE */
818 # define IS_TOGGLED_ON_AND
819 #endif /* ndef FEATURE_TOGGLE */
820 #ifdef FEATURE_FORCE_LOAD
821 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
822 #else /* ifndef FEATURE_FORCE_LOAD */
823 # define IS_NOT_FORCED_AND
824 #endif /* def FEATURE_FORCE_LOAD */
826 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
828 char buf[BUFFER_SIZE];
836 int ms_iis5_hack = 0;
838 const struct forward_spec * fwd;
839 struct http_request *http;
840 int len; /* for buffer sizes */
841 #ifdef FEATURE_KILL_POPUPS
842 int block_popups; /* bool, 1==will block popups */
843 int block_popups_now = 0; /* bool, 1==currently blocking popups */
844 #endif /* def FEATURE_KILL_POPUPS */
846 int pcrs_filter; /* bool, 1==will filter through pcrs */
847 int gif_deanimate; /* bool, 1==will deanimate gifs */
849 /* Function that does the content filtering for the current request */
850 char *(*content_filter)() = NULL;
852 /* Skeleton for HTTP response, if we should intercept the request */
853 struct http_response *rsp;
858 * Read the client's request. Note that since we're not using select() we
859 * could get blocked here if a client connected, then didn't say anything!
864 len = read_socket(csp->cfd, buf, sizeof(buf));
866 if (len <= 0) break; /* error! */
869 * If there is no memory left for buffering the
870 * request, there is nothing we can do but hang up
872 if (add_to_iob(csp, buf, len))
877 req = get_header(csp);
881 break; /* no HTTP request! */
886 continue; /* more to come! */
889 #ifdef FEATURE_FORCE_LOAD
890 /* If this request contains the FORCE_PREFIX,
891 * better get rid of it now and set the force flag --oes
894 if (strstr(req, FORCE_PREFIX))
896 strclean(req, FORCE_PREFIX);
897 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
898 csp->flags |= CSP_FLAG_FORCED;
901 #endif /* def FEATURE_FORCE_LOAD */
903 parse_http_request(req, http, csp);
908 if (http->cmd == NULL)
910 strcpy(buf, CHEADER);
911 write_socket(csp->cfd, buf, strlen(buf));
913 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
915 free_http_request(http);
919 /* decide how to route the HTTP request */
921 if ((fwd = forward_url(http, csp)) == NULL)
923 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
924 /* Never get here - LOG_LEVEL_FATAL causes program exit */
927 /* build the http request to send to the server
928 * we have to do one of the following:
930 * create = use the original HTTP request to create a new
931 * HTTP request that has either the path component
932 * without the http://domainspec (w/path) or the
933 * full orininal URL (w/url)
934 * Note that the path and/or the HTTP version may
935 * have been altered by now.
937 * connect = Open a socket to the host:port of the server
938 * and short-circuit server and client socket.
940 * pass = Pass the request unchanged if forwarding a CONNECT
941 * request to a parent proxy. Note that we'll be sending
942 * the CFAIL message ourselves if connecting to the parent
943 * fails, but we won't send a CSUCCEED message if it works,
944 * since that would result in a double message (ours and the
945 * parent's). After sending the request to the parent, we simply
951 * +--------+--------+
953 * 0 | create | connect|
955 * Forwarding +--------+--------+
957 * 1 | create | pass |
959 * +--------+--------+
964 * Determine the actions for this URL
966 #ifdef FEATURE_TOGGLE
967 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
969 /* Most compatible set of actions (i.e. none) */
970 init_current_action(csp->action);
973 #endif /* ndef FEATURE_TOGGLE */
975 url_actions(http, csp);
980 * Check if a CONNECT request is allowable:
981 * In the absence of a +limit-connect action, allow only port 443.
982 * If there is an action, allow whatever matches the specificaton.
986 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
987 || (csp->action->flags & ACTION_LIMIT_CONNECT
988 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
990 strcpy(buf, CFORBIDDEN);
991 write_socket(csp->cfd, buf, strlen(buf));
993 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
994 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
1002 * Downgrade http version from 1.1 to 1.0 if +downgrade
1005 if ( (http->ssl == 0)
1006 && (!strcmpic(http->ver, "HTTP/1.1"))
1007 && (csp->action->flags & ACTION_DOWNGRADE))
1010 http->ver = strdup("HTTP/1.0");
1012 if (http->ver == NULL)
1014 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
1019 * Save a copy of the original request for logging
1021 http->ocmd = strdup(http->cmd);
1023 if (http->ocmd == NULL)
1025 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
1029 * (Re)build the HTTP request for non-SSL requests.
1030 * If forwarding, use the whole URL, else, use only the path.
1036 http->cmd = strdup(http->gpc);
1037 string_append(&http->cmd, " ");
1039 if (fwd->forward_host)
1041 string_append(&http->cmd, http->url);
1045 string_append(&http->cmd, http->path);
1047 string_append(&http->cmd, " ");
1048 string_append(&http->cmd, http->ver);
1050 if (http->cmd == NULL)
1052 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
1054 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", http->cmd);
1056 enlist(csp->headers, http->cmd);
1060 * If the user has not supplied any wafers, and the user has not
1061 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1063 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1064 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1066 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1070 #ifdef FEATURE_KILL_POPUPS
1071 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
1072 #endif /* def FEATURE_KILL_POPUPS */
1074 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
1075 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
1077 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
1079 /* grab the rest of the client's headers */
1083 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1085 len = read_socket(csp->cfd, buf, sizeof(buf));
1088 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1093 * If there is no memory left for buffering the
1094 * request, there is nothing we can do but hang up
1096 if (add_to_iob(csp, buf, len))
1103 if (p == NULL) break;
1105 enlist(csp->headers, p);
1110 * We have a request. Now, check to see if we need to
1111 * intercept it, i.e. If ..
1115 /* We may not forward the request by rfc2616 sect 14.31 */
1116 (NULL != (rsp = direct_response(csp)))
1118 /* or a CGI call was detected and answered */
1119 || (NULL != (rsp = dispatch_cgi(csp)))
1121 /* or we are enabled and... */
1122 || (IS_ENABLED_AND (
1124 /* ..the request was blocked */
1125 ( NULL != (rsp = block_url(csp)))
1127 /* ..or untrusted */
1128 #ifdef FEATURE_TRUST
1129 || ( NULL != (rsp = trust_url(csp)))
1130 #endif /* def FEATURE_TRUST */
1132 /* ..or a fast redirect kicked in */
1133 #ifdef FEATURE_FAST_REDIRECTS
1134 || (((csp->action->flags & ACTION_FAST_REDIRECTS) != 0) &&
1135 (NULL != (rsp = redirect_url(csp))))
1136 #endif /* def FEATURE_FAST_REDIRECTS */
1140 /* Write the answer to the client */
1141 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1142 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1144 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1147 #ifdef FEATURE_STATISTICS
1148 /* Count as a rejected request */
1149 csp->flags |= CSP_FLAG_REJECTED;
1150 #endif /* def FEATURE_STATISTICS */
1152 /* Log (FIXME: All intercept reasons apprear as "crunch" with Status 200) */
1153 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
1154 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
1156 /* Clean up and return */
1157 free_http_response(rsp);
1161 hdr = sed(client_patterns, add_client_headers, csp);
1164 /* FIXME Should handle error properly */
1165 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1168 list_remove_all(csp->headers);
1170 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1172 if (fwd->forward_host)
1174 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1175 fwd->forward_host, fwd->forward_port, http->hostport);
1179 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1182 /* here we connect to the server, gateway, or the forwarder */
1184 csp->sfd = forwarded_connect(fwd, http, csp);
1186 if (csp->sfd == JB_INVALID_SOCKET)
1188 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1191 if (errno == EINVAL)
1193 rsp = error_response(csp, "no-such-domain", errno);
1195 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
1196 csp->ip_addr_str, http->ocmd);
1200 rsp = error_response(csp, "connect-failed", errno);
1202 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1203 csp->ip_addr_str, http->ocmd);
1207 /* Write the answer to the client */
1210 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1211 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1213 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1217 free_http_response(rsp);
1222 log_error(LOG_LEVEL_CONNECT, "OK");
1224 if (fwd->forward_host || (http->ssl == 0))
1226 /* write the client's (modified) header to the server
1227 * (along with anything else that may be in the buffer)
1230 if (write_socket(csp->sfd, hdr, strlen(hdr))
1231 || (flush_socket(csp->sfd, csp) < 0))
1233 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1236 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1237 csp->ip_addr_str, http->ocmd);
1239 rsp = error_response(csp, "connect-failed", errno);
1243 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1244 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1246 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1250 free_http_response(rsp);
1258 * We're running an SSL tunnel and we're not forwarding,
1259 * so just send the "connect succeeded" message to the
1260 * client, flush the rest, and get out of the way.
1262 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1263 csp->ip_addr_str, http->ocmd);
1265 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
1273 /* we're finished with the client's header */
1276 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1278 /* pass data between the client and server
1279 * until one or the other shuts down the connection.
1288 * FD_ZERO here seems to point to an errant macro which crashes.
1289 * So do this by hand for now...
1291 memset(&rfds,0x00,sizeof(fd_set));
1295 FD_SET(csp->cfd, &rfds);
1296 FD_SET(csp->sfd, &rfds);
1298 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
1302 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1306 /* this is the body of the browser's request
1307 * just read it and write it.
1310 if (FD_ISSET(csp->cfd, &rfds))
1312 len = read_socket(csp->cfd, buf, sizeof(buf));
1316 break; /* "game over, man" */
1319 if (write_socket(csp->sfd, buf, (size_t)len))
1321 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1328 * The server wants to talk. It could be the header or the body.
1329 * If `hdr' is null, then it's the header otherwise it's the body.
1330 * FIXME: Does `hdr' really mean `host'? No.
1334 if (FD_ISSET(csp->sfd, &rfds))
1337 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1341 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1343 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1344 csp->ip_addr_str, http->ocmd);
1346 rsp = error_response(csp, "connect-failed", errno);
1350 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1351 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1353 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1357 free_http_response(rsp);
1361 /* Add a trailing zero. This lets filter_popups
1362 * use string operations.
1366 #ifdef FEATURE_KILL_POPUPS
1367 /* Filter the popups on this read. */
1368 if (block_popups_now)
1370 filter_popups(buf, csp);
1372 #endif /* def FEATURE_KILL_POPUPS */
1374 /* Normally, this would indicate that we've read
1375 * as much as the server has sent us and we can
1376 * close the client connection. However, Microsoft
1377 * in its wisdom has released IIS/5 with a bug that
1378 * prevents it from sending the trailing \r\n in
1379 * a 302 redirect header (and possibly other headers).
1380 * To work around this if we've haven't parsed
1381 * a full header we'll append a trailing \r\n
1382 * and see if this now generates a valid one.
1384 * This hack shouldn't have any impacts. If we've
1385 * already transmitted the header or if this is a
1386 * SSL connection, then we won't bother with this
1387 * hack. So we only work on partially received
1388 * headers. If we append a \r\n and this still
1389 * doesn't generate a valid header, then we won't
1390 * transmit anything to the client.
1395 if (server_body || http->ssl)
1398 * If we have been buffering up the document,
1399 * now is the time to apply content modification
1400 * and send the result to the client.
1405 * If the content filter fails, use the original
1406 * buffer and length.
1407 * (see p != NULL ? p : csp->iob->cur below)
1409 if (NULL == (p = (*content_filter)(csp)))
1411 csp->content_length = csp->iob->eod - csp->iob->cur;
1414 hdr = sed(server_patterns, add_server_headers, csp);
1417 /* FIXME Should handle error properly */
1418 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1421 if (write_socket(csp->cfd, hdr, strlen(hdr))
1422 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
1424 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1434 break; /* "game over, man" */
1438 * This is NOT the body, so
1439 * Let's pretend the server just sent us a blank line.
1441 len = sprintf(buf, "\r\n");
1444 * Now, let the normal header parsing algorithm below do its
1445 * job. If it fails, we'll exit instead of continuing.
1452 * If this is an SSL connection or we're in the body
1453 * of the server document, just write it to the client,
1454 * unless we need to buffer the body for later content-filtering
1457 if (server_body || http->ssl)
1462 * If there is no memory left for buffering the content, or the buffer limit
1463 * has been reached, switch to non-filtering mode, i.e. make & write the
1464 * header, flush the iob and buf, and get out of the way.
1466 if (add_to_iob(csp, buf, len))
1471 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
1473 hdr = sed(server_patterns, add_server_headers, csp);
1477 * Memory is too tight to even generate the header.
1478 * Send our static "Out-of-memory" page.
1480 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
1481 rsp = cgi_error_memory();
1483 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1484 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1486 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1491 hdrlen = strlen(hdr);
1493 if (write_socket(csp->cfd, hdr, hdrlen)
1494 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
1495 || (write_socket(csp->cfd, buf, (size_t) len)))
1497 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
1503 byte_count += hdrlen + flushed + len;
1505 content_filter = NULL;
1512 if (write_socket(csp->cfd, buf, (size_t)len))
1514 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
1523 /* we're still looking for the end of the
1524 * server's header ... (does that make header
1525 * parsing an "out of body experience" ?
1529 * buffer up the data we just read. If that fails,
1530 * there's little we can do but send our static
1531 * out-of-memory page.
1533 if (add_to_iob(csp, buf, len))
1535 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
1536 rsp = cgi_error_memory();
1538 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1539 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1541 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1546 /* get header lines from the iob */
1548 while ((p = get_header(csp)) != NULL)
1552 /* see following note */
1555 enlist(csp->headers, p);
1559 /* NOTE: there are no "empty" headers so
1560 * if the pointer `p' is not NULL we must
1561 * assume that we reached the end of the
1562 * buffer before we hit the end of the header.
1569 /* Well, we tried our MS IIS/5
1570 * hack and it didn't work.
1571 * The header is incomplete
1572 * and there isn't anything
1573 * we can do about it.
1579 /* Since we have to wait for
1580 * more from the server before
1581 * we can parse the headers
1582 * we just continue here.
1588 /* we have now received the entire header.
1589 * filter it and send the result to the client
1592 hdr = sed(server_patterns, add_server_headers, csp);
1595 /* FIXME Should handle error properly */
1596 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1599 #ifdef FEATURE_KILL_POPUPS
1600 /* Start blocking popups if appropriate. */
1602 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1603 !http->ssl && /* We talk plaintext */
1604 block_popups) /* Policy allows */
1606 block_popups_now = 1;
1608 * Filter the part of the body that came in the same read
1609 * as the last headers:
1611 filter_popups(csp->iob->cur, csp);
1614 #endif /* def FEATURE_KILL_POPUPS */
1616 /* Buffer and pcrs filter this if appropriate. */
1618 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1619 !http->ssl && /* We talk plaintext */
1620 pcrs_filter) /* Policy allows */
1622 content_filter = pcrs_filter_response;
1625 /* Buffer and gif_deanimate this if appropriate. */
1627 if ((csp->content_type & CT_GIF) && /* It's a image/gif MIME-Type */
1628 !http->ssl && /* We talk plaintext */
1629 gif_deanimate) /* Policy allows */
1631 content_filter = gif_deanimate_response;
1635 * Only write if we're not buffering for content modification
1637 if (!content_filter)
1639 /* write the server's (modified) header to
1640 * the client (along with anything else that
1641 * may be in the buffer)
1644 if (write_socket(csp->cfd, hdr, strlen(hdr))
1645 || ((len = flush_socket(csp->cfd, csp)) < 0))
1647 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1649 /* the write failed, so don't bother
1650 * mentioning it to the client...
1651 * it probably can't hear us anyway.
1660 /* we're finished with the server's header */
1665 /* If this was a MS IIS/5 hack then it means
1666 * the server has already closed the
1667 * connection. Nothing more to read. Time
1678 return; /* huh? we should never get here */
1681 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
1682 csp->ip_addr_str, http->ocmd, byte_count);
1686 /*********************************************************************
1690 * Description : This is little more than chat. We only "serve" to
1691 * to close any socket that chat may have opened.
1694 * 1 : csp = Current client state (buffers, headers, etc...)
1698 *********************************************************************/
1700 void serve(struct client_state *csp)
1701 #else /* ifndef AMIGA */
1702 static void serve(struct client_state *csp)
1703 #endif /* def AMIGA */
1706 close_socket(csp->cfd);
1708 if (csp->sfd != JB_INVALID_SOCKET)
1710 close_socket(csp->sfd);
1713 csp->flags &= ~CSP_FLAG_ACTIVE;
1719 /*********************************************************************
1721 * Function : server_thread
1723 * Description : We only exist to call `serve' in a threaded environment.
1726 * 1 : data = Current client state (buffers, headers, etc...)
1728 * Returns : Always 0.
1730 *********************************************************************/
1731 static int32 server_thread(void *data)
1733 serve((struct client_state *) data);
1740 /*********************************************************************
1744 * Description : Print usage info & exit.
1746 * Parameters : Pointer to argv[0] for identifying ourselves
1750 *********************************************************************/
1751 void usage(const char *myname)
1753 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
1755 "Usage: %s [--help] [--version] [configfile]\n"
1757 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
1759 "Aborting.\n", myname);
1766 /*********************************************************************
1770 * Description : Load the config file and start the listen loop.
1771 * This function is a lot more *sane* with the `load_config'
1772 * and `listen_loop' functions; although it stills does
1773 * a *little* too much for my taste.
1776 * 1 : argc = Number of parameters (including $0).
1777 * 2 : argv = Array of (char *)'s to the parameters.
1779 * Returns : 1 if : can't open config file, unrecognized directive,
1780 * stats requested in multi-thread mode, can't open the
1781 * log file, can't open the jar file, listen port is invalid,
1782 * any load fails, and can't bind port.
1784 * Else main never returns, the process must be signaled
1785 * to terminate execution. Or, on Windows, use the
1786 * "File", "Exit" menu option.
1788 *********************************************************************/
1790 int real_main(int argc, const char *argv[])
1792 int main(int argc, const char *argv[])
1797 struct passwd *pw = NULL;
1798 struct group *grp = NULL;
1807 #if !defined(_WIN32)
1815 * Parse the command line arguments
1817 while (++argc_pos < argc)
1819 if (strcmp(argv[argc_pos], "--help") == 0)
1824 else if(strcmp(argv[argc_pos], "--version") == 0)
1826 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
1832 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
1837 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
1839 if (++argc_pos == argc) usage(argv[0]);
1840 pidfile = strdup(argv[argc_pos]);
1843 else if (strcmp(argv[argc_pos], "--user" ) == 0)
1845 if (++argc_pos == argc) usage(argv[argc_pos]);
1847 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
1850 if (NULL == (grp = getgrnam(p)))
1852 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
1856 if (NULL == (pw = getpwnam(argv[argc_pos])))
1858 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
1861 if (p != NULL) *--p = '\0';
1864 else if (strcmp(argv[argc_pos], "--chroot" ) == 0)
1869 #endif /* defined(unix) */
1873 configfile = argv[argc_pos];
1876 } /* -END- while (more arguments) */
1879 if ( *configfile != '/' )
1881 char *abs_file, cwd[1024];
1883 /* make config-filename absolute here */
1884 if ( !(getcwd(cwd, sizeof(cwd))))
1886 perror("get working dir failed");
1890 if (!(basedir = strdup(cwd))
1891 || (!(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 ))))
1893 perror("malloc failed");
1896 strcpy( abs_file, basedir );
1897 strcat( abs_file, "/" );
1898 strcat( abs_file, configfile );
1899 configfile = abs_file;
1901 #endif /* defined unix */
1905 clients->next = NULL;
1909 #elif defined(_WIN32)
1915 * Prepare global mutex semaphores
1917 pthread_mutex_init(&gmtime_mutex,0);
1918 pthread_mutex_init(&localtime_mutex,0);
1919 pthread_mutex_init(&gethostbyaddr_mutex,0);
1920 pthread_mutex_init(&gethostbyname_mutex,0);
1921 #endif /* def OSX_DARWIN */
1924 * Unix signal handling
1926 * Catch the abort, interrupt and terminate signals for a graceful exit
1927 * Catch the hangup signal so the errlog can be reopened.
1928 * Ignore the broken pipe signals (FIXME: Why?)
1930 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1933 const int catched_signals[] = { SIGABRT, SIGTERM, SIGINT, SIGHUP, 0 };
1934 const int ignored_signals[] = { SIGPIPE, 0 };
1936 for (idx = 0; catched_signals[idx] != 0; idx++)
1938 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
1940 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
1944 for (idx = 0; ignored_signals[idx] != 0; idx++)
1946 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
1948 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
1953 #else /* ifdef _WIN32 */
1954 # ifdef _WIN_CONSOLE
1956 * We *are* in a windows console app.
1957 * Print a verbose messages about FAQ's and such
1959 printf(win32_blurb);
1960 # endif /* def _WIN_CONSOLE */
1961 #endif /* def _WIN32 */
1964 /* Initialize the CGI subsystem */
1965 cgi_init_error_messages();
1968 * If runnig on unix and without the --nodaemon
1969 * option, become a daemon. I.e. fork, detach
1970 * from tty and get process group leadership
1983 if ( pid < 0 ) /* error */
1988 else if ( pid != 0 ) /* parent */
1993 * must check for errors
1994 * child died due to missing files aso
1997 wpid = waitpid( pid, &status, WNOHANG );
2006 /* Should be more portable, but not as well tested */
2011 #else /* ndef __FreeBSD__ */
2013 #endif /* ndef __FreeBSD__ */
2014 fd = open("/dev/tty", O_RDONLY);
2017 /* no error check here */
2018 ioctl( fd, TIOCNOTTY,0 );
2022 /* FIXME: should close stderr (fd 2) here too, but the test
2024 * and load config file is done in listen_loop() and puts
2025 * some messages on stderr there.
2032 } /* -END- if (!no_daemon) */
2035 * As soon as we have written the PID file, we can switch
2036 * to the user and group ID indicated by the --user option
2042 if (((NULL != grp) && setgid(grp->gr_gid)) || (setgid(pw->pw_gid)))
2044 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
2050 log_error(LOG_LEVEL_FATAL, "Home directory for %s undefined", pw->pw_name);
2052 if (chroot(pw->pw_dir) < 0)
2054 log_error(LOG_LEVEL_FATAL, "Cannot chroot to %s", pw->pw_dir);
2058 log_error(LOG_LEVEL_FATAL, "Cannot chdir /");
2061 if (setuid(pw->pw_uid))
2063 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
2067 char putenv_dummy[64];
2069 strcpy(putenv_dummy, "HOME=/");
2070 if (putenv(putenv_dummy) != 0)
2072 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): HOME");
2075 snprintf(putenv_dummy, 64, "USER=%s", pw->pw_name);
2076 if (putenv(putenv_dummy) != 0)
2078 log_error(LOG_LEVEL_FATAL, "Cannot putenv(): USER");
2084 log_error(LOG_LEVEL_FATAL, "Cannot chroot without --user argument.");
2087 #endif /* defined unix */
2097 /*********************************************************************
2099 * Function : bind_port_helper
2101 * Description : Bind the listen port. Handles logging, and aborts
2105 * 1 : config = Privoxy configuration. Specifies port
2108 * Returns : Port that was opened.
2110 *********************************************************************/
2111 static jb_socket bind_port_helper(struct configuration_spec * config)
2116 if ( (config->haddr != NULL)
2117 && (config->haddr[0] == '1')
2118 && (config->haddr[1] == '2')
2119 && (config->haddr[2] == '7')
2120 && (config->haddr[3] == '.') )
2122 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
2125 else if (config->haddr == NULL)
2127 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
2132 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
2133 config->hport, config->haddr);
2136 result = bind_port(config->haddr, config->hport, &bfd);
2143 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2144 "There may be another Privoxy or some other "
2145 "proxy running on port %d",
2146 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
2147 config->hport, config->hport);
2150 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2151 "The hostname is not resolvable",
2152 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2155 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
2156 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2159 /* shouldn't get here */
2160 return JB_INVALID_SOCKET;
2163 config->need_bind = 0;
2169 /*********************************************************************
2171 * Function : listen_loop
2173 * Description : bind the listen port and enter a "FOREVER" listening loop.
2179 *********************************************************************/
2180 static void listen_loop(void)
2182 struct client_state *csp = NULL;
2184 struct configuration_spec * config;
2186 config = load_config();
2188 bfd = bind_port_helper(config);
2190 #ifdef FEATURE_GRACEFUL_TERMINATION
2191 while (!g_terminate)
2196 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
2197 while (waitpid(-1, NULL, WNOHANG) > 0)
2199 /* zombie children */
2201 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
2204 * Free data that was used by died threads
2210 * Re-open the errlog after HUP signal
2212 if (received_hup_signal)
2214 init_error_log(Argv[0], config->logfile, config->debug);
2215 received_hup_signal = 0;
2220 #ifdef FEATURE_COOKIE_JAR
2222 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
2223 * already open. I think unload_configfile() is not being run, which should do
2224 * this work. Until that can get resolved, we'll use this workaround.
2228 if (csp->config->jar)
2230 fclose(csp->config->jar);
2231 csp->config->jar = NULL;
2233 #endif /* FEATURE_COOKIE_JAR */
2234 #endif /* __OS2__ */
2236 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
2238 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
2242 csp->flags |= CSP_FLAG_ACTIVE;
2243 csp->sfd = JB_INVALID_SOCKET;
2245 csp->config = config = load_config();
2247 if ( config->need_bind )
2250 * Since we were listening to the "old port", we will not see
2251 * a "listen" param change until the next IJB request. So, at
2252 * least 1 more request must be made for us to find the new
2253 * setting. I am simply closing the old socket and binding the
2256 * Which-ever is correct, we will serve 1 more page via the
2257 * old settings. This should probably be a "show-proxy-args"
2258 * request. This should not be a so common of an operation
2259 * that this will hurt people's feelings.
2264 bfd = bind_port_helper(config);
2267 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
2269 if (!accept_connection(csp, bfd))
2271 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
2284 log_error(LOG_LEVEL_CONNECT, "OK");
2287 #ifdef FEATURE_TOGGLE
2288 if (global_toggle_state)
2290 csp->flags |= CSP_FLAG_TOGGLED_ON;
2292 #endif /* def FEATURE_TOGGLE */
2294 if (run_loader(csp))
2296 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
2297 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2301 if (block_acl(NULL,csp))
2303 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
2304 close_socket(csp->cfd);
2308 #endif /* def FEATURE_ACL */
2310 /* add it to the list of clients */
2311 csp->next = clients->next;
2312 clients->next = csp;
2314 if (config->multi_threaded)
2318 /* this is a switch () statment in the C preprocessor - ugh */
2319 #undef SELECTED_ONE_OPTION
2321 /* Use Pthreads in preference to native code */
2322 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
2323 #define SELECTED_ONE_OPTION
2325 pthread_t the_thread;
2326 pthread_attr_t attrs;
2328 pthread_attr_init(&attrs);
2329 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
2330 errno = pthread_create(&the_thread, &attrs,
2332 child_id = errno ? -1 : 0;
2333 pthread_attr_destroy(&attrs);
2337 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
2338 #define SELECTED_ONE_OPTION
2339 child_id = _beginthread(
2340 (void (*)(void *))serve,
2345 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
2346 #define SELECTED_ONE_OPTION
2347 child_id = _beginthread(
2348 (void(* _Optlink)(void*))serve,
2354 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
2355 #define SELECTED_ONE_OPTION
2357 thread_id tid = spawn_thread
2358 (server_thread, "server", B_NORMAL_PRIORITY, csp);
2360 if ((tid >= 0) && (resume_thread(tid) == B_OK))
2362 child_id = (int) tid;
2371 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2372 #define SELECTED_ONE_OPTION
2373 csp->cfd = ReleaseSocket(csp->cfd, -1);
2375 if((child_id = (int)CreateNewProcTags(
2376 NP_Entry, (ULONG)server_thread,
2377 NP_Output, Output(),
2378 NP_CloseOutput, FALSE,
2379 NP_Name, (ULONG)"privoxy child",
2380 NP_StackSize, 200*1024,
2384 ((struct Task *)child_id)->tc_UserData = csp;
2385 Signal((struct Task *)child_id, SIGF_SINGLE);
2390 #if !defined(SELECTED_ONE_OPTION)
2393 /* This block is only needed when using fork().
2394 * When using threads, the server thread was
2395 * created and run by the call to _beginthread().
2397 if (child_id == 0) /* child */
2400 #ifdef FEATURE_TOGGLE
2401 int inherited_toggle_state = global_toggle_state;
2402 #endif /* def FEATURE_TOGGLE */
2407 * If we've been toggled or we've blocked the request, tell Mom
2410 #ifdef FEATURE_TOGGLE
2411 if (inherited_toggle_state != global_toggle_state)
2413 rc |= RC_FLAG_TOGGLED;
2415 #endif /* def FEATURE_TOGGLE */
2417 #ifdef FEATURE_STATISTICS
2418 if (csp->flags & CSP_FLAG_REJECTED)
2420 rc |= RC_FLAG_BLOCKED;
2422 #endif /* ndef FEATURE_STATISTICS */
2426 else if (child_id > 0) /* parent */
2428 /* in a fork()'d environment, the parent's
2429 * copy of the client socket and the CSP
2433 #if !defined(_WIN32) && !defined(__CYGWIN__)
2435 wait( &child_status );
2438 * Evaluate child's return code: If the child has
2439 * - been toggled, toggle ourselves
2440 * - blocked its request, bump up the stats counter
2443 #ifdef FEATURE_TOGGLE
2444 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_TOGGLED))
2446 global_toggle_state = !global_toggle_state;
2448 #endif /* def FEATURE_TOGGLE */
2450 #ifdef FEATURE_STATISTICS
2452 if (WIFEXITED(child_status) && (WEXITSTATUS(child_status) & RC_FLAG_BLOCKED))
2456 #endif /* def FEATURE_STATISTICS */
2458 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
2459 close_socket(csp->cfd);
2460 csp->flags &= ~CSP_FLAG_ACTIVE;
2464 #undef SELECTED_ONE_OPTION
2465 /* end of cpp switch () */
2467 if (child_id < 0) /* failed */
2469 char buf[BUFFER_SIZE];
2471 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
2473 sprintf(buf , "Privoxy: can't fork: errno = %d", errno);
2475 write_socket(csp->cfd, buf, strlen(buf));
2476 close_socket(csp->cfd);
2477 csp->flags &= ~CSP_FLAG_ACTIVE;
2488 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
2490 /* Clean up. Aim: free all memory (no leaks) */
2491 #ifdef FEATURE_GRACEFUL_TERMINATION
2493 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
2495 unload_current_config_file();
2496 unload_current_actions_file();
2497 unload_current_re_filterfile();
2498 #ifdef FEATURE_TRUST
2499 unload_current_trust_file();
2502 if (config->multi_threaded)
2509 } while ((clients->next != NULL) && (--i > 0));
2513 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
2524 #ifdef FEATURE_COOKIE_JAR
2525 if (NULL != config->jar)
2527 fclose(config->jar);
2531 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
2532 /* Cleanup - remove taskbar icon etc. */
2537 #endif /* FEATURE_GRACEFUL_TERMINATION */