1 const char jcc_rcs[] = "$Id: jcc.c,v 1.92.2.1 2002/09/25 14:52:24 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 1.92.2.1 2002/09/25 14:52:24 oes
37 * Added basic support for OPTIONS and TRACE HTTP methods:
38 * - New interceptor direct_response() added in chat().
39 * - sed() moved to earlier in the process, so that the
40 * Host: header is evaluated before actions and forwarding
43 * Revision 1.92 2002/05/08 16:00:46 oes
44 * Chat's buffer handling:
45 * - Fixed bug with unchecked out-of-mem conditions
46 * while reading client request & server headers
47 * - No longer predict if the buffer limit will be exceeded
48 * in the next read -- check add_to_iob's new
49 * return code. If buffer couldn't be extended
50 * (policy or out-of-mem) while
51 * - reading from client: abort
52 * - reading server headers: send error page
53 * - buffering server body for filter: flush,
54 * and if that fails: send error page
56 * Revision 1.91 2002/04/08 20:35:58 swa
59 * Revision 1.90 2002/04/02 14:57:28 oes
60 * Made sending wafers independent of FEATURE_COOKIE_JAR
62 * Revision 1.89 2002/03/31 17:18:59 jongfoster
63 * Win32 only: Enabling STRICT to fix a VC++ compile warning.
65 * Revision 1.88 2002/03/27 14:32:43 david__schmidt
66 * More compiler warning message maintenance
68 * Revision 1.87 2002/03/26 22:29:54 swa
69 * we have a new homepage!
71 * Revision 1.86 2002/03/25 17:04:55 david__schmidt
72 * Workaround for closing the jarfile before load_config() comes around again
74 * Revision 1.85 2002/03/24 15:23:33 jongfoster
77 * Revision 1.84 2002/03/24 13:25:43 swa
78 * name change related issues
80 * Revision 1.83 2002/03/16 23:54:06 jongfoster
81 * Adding graceful termination feature, to help look for memory leaks.
82 * If you enable this (which, by design, has to be done by hand
83 * editing config.h) and then go to http://i.j.b/die, then the program
84 * will exit cleanly after the *next* request. It should free all the
85 * memory that was used.
87 * Revision 1.82 2002/03/13 00:27:05 jongfoster
90 * Revision 1.81 2002/03/12 01:42:50 oes
91 * Introduced modular filters
93 * Revision 1.80 2002/03/11 22:07:05 david__schmidt
94 * OS/2 port maintenance:
95 * - Fixed EMX build - it had decayed a little
96 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
97 * substituted a memset for now.
99 * Revision 1.79 2002/03/09 20:03:52 jongfoster
100 * - Making various functions return int rather than size_t.
101 * (Undoing a recent change). Since size_t is unsigned on
102 * Windows, functions like read_socket that return -1 on
103 * error cannot return a size_t.
105 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
106 * crashes, and also frequently caused JB to jump to 100%
107 * CPU and stay there. (Because it thought it had just
108 * read ((unsigned)-1) == 4Gb of data...)
110 * - The signature of write_socket has changed, it now simply
111 * returns success=0/failure=nonzero.
113 * - Trying to get rid of a few warnings --with-debug on
114 * Windows, I've introduced a new type "jb_socket". This is
115 * used for the socket file descriptors. On Windows, this
116 * is SOCKET (a typedef for unsigned). Everywhere else, it's
117 * an int. The error value can't be -1 any more, so it's
118 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
119 * Windows it maps to the #define INVALID_SOCKET.)
121 * - The signature of bind_port has changed.
123 * Revision 1.78 2002/03/08 21:35:04 oes
124 * Added optional group supplement to --user option. Will now use default group of user if no group given
126 * Revision 1.77 2002/03/07 03:52:06 oes
127 * - Fixed compiler warnings etc
128 * - Improved handling of failed DNS lookups
130 * Revision 1.76 2002/03/06 22:54:35 jongfoster
131 * Automated function-comment nitpicking.
133 * Revision 1.75 2002/03/06 10:02:19 oes
134 * Fixed stupid bug when --user was not given
136 * Revision 1.74 2002/03/06 00:49:31 jongfoster
137 * Fixing warning on Windows
138 * Making #ifdefs that refer to the same variable consistently
139 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
141 * Revision 1.73 2002/03/05 23:57:30 hal9
142 * Stray character 's' on line 1618 was breaking build.
144 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
145 * - Re-enable OS/2 building after new parms were added
146 * - Fix false out of memory report when resolving CGI templates when no IP
147 * address is available of failed attempt (a la no such domain)
149 * Revision 1.71 2002/03/05 18:13:56 oes
150 * Added --user option
152 * Revision 1.70 2002/03/05 04:52:42 oes
153 * Deleted non-errlog debugging code
155 * Revision 1.69 2002/03/04 23:50:00 jongfoster
156 * Splitting off bind_port() call into bind_port_helper(), with
159 * Revision 1.68 2002/03/04 20:17:32 oes
162 * Revision 1.67 2002/03/04 18:18:57 oes
163 * - Removed _DEBUG mode
164 * - Cleand up cmdline parsing
165 * - Introduced --no-daemon, --pidfile options
166 * - Cleaned up signal handling:
167 * - Terminate cleanly on INT, TERM and ABRT
168 * - Schedule logfile for re-opening on HUP
169 * - Ignore CHLD and PIPE
170 * - Leave the rest with their default handlers
171 * - Uniform handler registration
172 * - Added usage() function
173 * - Played styleguide police
175 * Revision 1.66 2002/03/03 15:06:55 oes
176 * Re-enabled automatic config reloading
178 * Revision 1.65 2002/03/03 14:49:11 oes
179 * Fixed CLF logging: Now uses client's original HTTP request
181 * Revision 1.64 2002/03/03 09:18:03 joergs
182 * Made jumbjuster work on AmigaOS again.
184 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
185 * Clean up a little CRLF unpleasantness that suddenly appeared
187 * Revision 1.62 2002/02/20 23:17:23 jongfoster
188 * Detecting some out-of memory conditions and exiting with a log message.
190 * Revision 1.61 2002/01/17 21:01:52 jongfoster
191 * Moving all our URL and URL pattern parsing code to urlmatch.c.
193 * Revision 1.60 2001/12/30 14:07:32 steudten
194 * - Add signal handling (unix)
195 * - Add SIGHUP handler (unix)
196 * - Add creation of pidfile (unix)
197 * - Add action 'top' in rc file (RH)
198 * - Add entry 'SIGNALS' to manpage
199 * - Add exit message to logfile (unix)
201 * Revision 1.59 2001/12/13 14:07:18 oes
202 * Fixed Bug: 503 error page now sent OK
204 * Revision 1.58 2001/11/30 23:37:24 jongfoster
205 * Renaming the Win32 config file to config.txt - this is almost the
206 * same as the corresponding UNIX name "config"
208 * Revision 1.57 2001/11/16 00:47:43 jongfoster
209 * Changing the tty-disconnection code to use setsid().
211 * Revision 1.56 2001/11/13 20:20:54 jongfoster
212 * Tabs->spaces, fixing a bug with missing {} around an if()
214 * Revision 1.55 2001/11/13 20:14:53 jongfoster
215 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
217 * Revision 1.54 2001/11/07 00:03:14 steudten
218 * Give reliable return value if an error
219 * occurs not just 0 with new daemon mode.
221 * Revision 1.53 2001/11/05 21:41:43 steudten
222 * Add changes to be a real daemon just for unix os.
223 * (change cwd to /, detach from controlling tty, set
224 * process group and session leader to the own process.
226 * Add some fatal-error log message for failed malloc().
227 * Add '-d' if compiled with 'configure --with-debug' to
228 * enable debug output.
230 * Revision 1.52 2001/10/26 20:11:20 jongfoster
231 * Fixing type mismatch
233 * Revision 1.51 2001/10/26 17:38:28 oes
236 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
237 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
238 * threads to call select() simultaneously. So, it's time to do a real, live,
239 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
240 * (native). Both versions will work, but using __OS2__ offers multi-threading.
242 * Revision 1.49 2001/10/23 21:41:35 jongfoster
243 * Added call to initialize the (statically-allocated of course)
244 * "out of memory" CGI response.
246 * Revision 1.48 2001/10/10 19:56:46 jongfoster
247 * Moving some code that wasn't cookie-related out of an #ifdef
250 * Revision 1.47 2001/10/10 16:44:36 oes
251 * Added CONNECT destination port limitation check
253 * Revision 1.46 2001/10/08 15:17:41 oes
254 * Re-enabled SSL forwarding
256 * Revision 1.45 2001/10/07 15:42:11 oes
257 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
259 * Moved downgrading of the HTTP version from parse_http_request to
260 * chat(), since we can't decide if it is necessary before we have
261 * determined the actions for the URL. The HTTP command is now
262 * *always* re-built so the repairs need no longer be special-cased.
264 * filter_popups now gets a csp pointer so it can raise the new
265 * CSP_FLAG_MODIFIED flag.
269 * Added configurable size limit for the IOB. If the IOB grows so
270 * large that the next read would exceed the limit, the header
271 * is generated, and the header & unfiltered buffer are flushed
272 * to the client. Chat then continues in non-buffering,
273 * non-filtering body mode.
275 * Revision 1.44 2001/10/02 18:13:57 oes
278 * Revision 1.43 2001/10/02 15:32:13 oes
279 * Moved generation of hdr
281 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
282 * Cleaning up 2 compiler warnings on OS/2.
284 * Revision 1.41 2001/09/16 17:05:14 jongfoster
285 * Removing unused #include showarg.h
287 * Revision 1.40 2001/09/16 15:41:45 jongfoster
288 * Fixing signed/unsigned comparison warning.
290 * Revision 1.39 2001/09/16 13:21:27 jongfoster
291 * Changes to use new list functions.
293 * Revision 1.38 2001/09/16 13:01:46 jongfoster
294 * Removing redundant function call that zeroed zalloc()'d memory.
296 * Revision 1.37 2001/09/10 11:12:24 oes
297 * Deleted unused variable
299 * Revision 1.36 2001/09/10 10:56:15 oes
300 * Silenced compiler warnings
302 * Revision 1.35 2001/07/31 14:44:22 oes
303 * Deleted unused size parameter from filter_popups()
305 * Revision 1.34 2001/07/30 22:08:36 jongfoster
306 * Tidying up #defines:
307 * - All feature #defines are now of the form FEATURE_xxx
308 * - Permanently turned off WIN_GUI_EDIT
309 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
311 * Revision 1.33 2001/07/29 19:32:00 jongfoster
312 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
314 * Revision 1.32 2001/07/29 18:47:05 jongfoster
315 * Adding missing #include "loadcfg.h"
317 * Revision 1.31 2001/07/29 12:17:48 oes
318 * Applied pthread fix by Paul Lieverse
320 * Revision 1.30 2001/07/25 22:57:13 jongfoster
321 * __BEOS__ no longer overrides FEATURE_PTHREAD.
322 * This is because FEATURE_PTHREAD will soon be widely used, so I
323 * want to keep it simple.
325 * Revision 1.29 2001/07/24 12:47:06 oes
326 * Applied BeOS support update by Eugenia
328 * Revision 1.28 2001/07/23 13:26:12 oes
329 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
331 * Revision 1.27 2001/07/19 19:09:47 haroon
332 * - Added code to take care of the situation where while processing the first
333 * server response (which includes the server header), after finding the end
334 * of the headers we were not looking past the end of the headers for
335 * content modification. I enabled it for filter_popups.
336 * Someone else should look to see if other similar operations should be
337 * done to the discarded portion of the buffer.
339 * Note 2001/07/20: No, the other content modification mechanisms will process
340 * the whole iob later anyway. --oes
342 * Revision 1.26 2001/07/18 12:31:36 oes
345 * Revision 1.25 2001/07/15 19:43:49 jongfoster
346 * Supports POSIX threads.
347 * Also removed some unused #includes.
349 * Revision 1.24 2001/07/13 14:00:40 oes
350 * - Generic content modification scheme:
351 * Each feature has its own applicability flag that is set
352 * from csp->action->flags.
353 * Replaced the "filtering" int flag , by a function pointer
354 * "content_filter" to the function that will do the content
355 * modification. If it is != NULL, the document will be buffered
356 * and processed through *content_filter, which must set
357 * csp->content_length and return a modified copy of the body
358 * or return NULL (on failiure).
359 * - Changed csp->is_text to the more generic bitmap csp->content_type
360 * which can currently take the valued CT_TEXT or CT_GIF
362 * - Removed all #ifdef PCRS
364 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
365 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
366 * the `block_acl' call. This prevents a compilation error when the user
367 * does not wish to use the "ACL" feature.
369 * Revision 1.22 2001/06/29 21:45:41 oes
370 * Indentation, CRLF->LF, Tab-> Space
372 * Revision 1.21 2001/06/29 13:29:36 oes
373 * - Cleaned up, improved comments
374 * - Unified all possible interceptors (CGI,
375 * block, trust, fast_redirect) in one
376 * place, with one (CGI) answer generation
377 * mechansim. Much clearer now.
378 * - Removed the GIF image generation, which
379 * is now done in filters.c:block_url()
380 * - Made error conditions like domain lookup
381 * failiure or (various) problems while talking
382 * to the server use cgi.c:error_response()
383 * instead of generating HTML/HTTP in chat() (yuck!)
384 * - Removed logentry from cancelled commit
386 * Revision 1.20 2001/06/09 10:55:28 jongfoster
387 * Changing BUFSIZ ==> BUFFER_SIZE
389 * Revision 1.19 2001/06/07 23:12:52 jongfoster
390 * Replacing function pointer in struct gateway with a directly
391 * called function forwarded_connect().
392 * Replacing struct gateway with struct forward_spec
394 * Revision 1.18 2001/06/03 19:12:16 oes
395 * introduced new cgi handling
397 * Revision 1.17 2001/06/01 20:07:23 jongfoster
398 * Now uses action +image-blocker{} rather than config->tinygif
400 * Revision 1.16 2001/06/01 18:49:17 jongfoster
401 * Replaced "list_share" with "list" - the tiny memory gain was not
402 * worth the extra complexity.
404 * Revision 1.15 2001/05/31 21:24:47 jongfoster
405 * Changed "permission" to "action" throughout.
406 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
407 * Moved vanilla wafer check into chat(), since we must now
408 * decide whether or not to add it based on the URL.
410 * Revision 1.14 2001/05/29 20:14:01 joergs
411 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
414 * Revision 1.13 2001/05/29 09:50:24 jongfoster
415 * Unified blocklist/imagelist/permissionslist.
416 * File format is still under discussion, but the internal changes
419 * Also modified interceptor behaviour:
420 * - We now intercept all URLs beginning with one of the following
421 * prefixes (and *only* these prefixes):
423 * * http://ijbswa.sf.net/config/
424 * * http://ijbswa.sourceforge.net/config/
425 * - New interceptors "home page" - go to http://i.j.b/ to see it.
426 * - Internal changes so that intercepted and fast redirect pages
427 * are not replaced with an image.
428 * - Interceptors now have the option to send a binary page direct
429 * to the client. (i.e. ijb-send-banner uses this)
430 * - Implemented show-url-info interceptor. (Which is why I needed
431 * the above interceptors changes - a typical URL is
432 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
433 * The previous mechanism would not have intercepted that, and
434 * if it had been intercepted then it then it would have replaced
437 * Revision 1.12 2001/05/27 22:17:04 oes
439 * - re_process_buffer no longer writes the modified buffer
440 * to the client, which was very ugly. It now returns the
441 * buffer, which it is then written by chat.
443 * - content_length now adjusts the Content-Length: header
444 * for modified documents rather than crunch()ing it.
445 * (Length info in csp->content_length, which is 0 for
446 * unmodified documents)
448 * - For this to work, sed() is called twice when filtering.
450 * Revision 1.11 2001/05/26 17:27:53 jongfoster
451 * Added support for CLF and fixed LOG_LEVEL_LOG.
452 * Also did CRLF->LF fix of my previous patch.
454 * Revision 1.10 2001/05/26 15:26:15 jongfoster
455 * ACL feature now provides more security by immediately dropping
456 * connections from untrusted hosts.
458 * Revision 1.9 2001/05/26 00:28:36 jongfoster
459 * Automatic reloading of config file.
460 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
461 * Most of the global variables have been moved to a new
462 * struct configuration_spec, accessed through csp->config->globalname
463 * Most of the globals remaining are used by the Win32 GUI.
465 * Revision 1.8 2001/05/25 22:43:18 jongfoster
466 * Fixing minor memory leak and buffer overflow.
468 * Revision 1.7 2001/05/25 22:34:30 jongfoster
471 * Revision 1.6 2001/05/23 00:13:58 joergs
472 * AmigaOS support fixed.
474 * Revision 1.5 2001/05/22 18:46:04 oes
476 * - Enabled filtering banners by size rather than URL
477 * by adding patterns that replace all standard banner
478 * sizes with the "Junkbuster" gif to the re_filterfile
480 * - Enabled filtering WebBugs by providing a pattern
481 * which kills all 1x1 images
483 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
484 * which is selected by the (nonstandard and therefore
485 * capital) letter 'U' in the option string.
486 * It causes the quantifiers to be ungreedy by default.
487 * Appending a ? turns back to greedy (!).
489 * - Added a new interceptor ijb-send-banner, which
490 * sends back the "Junkbuster" gif. Without imagelist or
491 * MSIE detection support, or if tinygif = 1, or the
492 * URL isn't recognized as an imageurl, a lame HTML
493 * explanation is sent instead.
495 * - Added new feature, which permits blocking remote
496 * script redirects and firing back a local redirect
498 * The feature is conditionally compiled, i.e. it
499 * can be disabled with --disable-fast-redirects,
500 * plus it must be activated by a "fast-redirects"
501 * line in the config file, has its own log level
502 * and of course wants to be displayed by show-proxy-args
503 * Note: Boy, all the #ifdefs in 1001 locations and
504 * all the fumbling with configure.in and acconfig.h
505 * were *way* more work than the feature itself :-(
507 * - Because a generic redirect template was needed for
508 * this, tinygif = 3 now uses the same.
510 * - Moved GIFs, and other static HTTP response templates
515 * - Removed some >400 CRs again (Jon, you really worked
518 * Revision 1.4 2001/05/21 19:34:01 jongfoster
519 * Made failure to bind() a fatal error.
521 * Revision 1.3 2001/05/20 01:21:20 jongfoster
522 * Version 2.9.4 checkin.
523 * - Merged popupfile and cookiefile, and added control over PCRS
524 * filtering, in new "permissionsfile".
525 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
526 * file error you now get a message box (in the Win32 GUI) rather
527 * than the program exiting with no explanation.
528 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
530 * - Removed tabs from "config"
531 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
532 * - Bumped up version number.
534 * Revision 1.2 2001/05/17 22:34:44 oes
535 * - Added hint on GIF char array generation to jcc.c
536 * - Cleaned CRLF's from the sources and related files
537 * - Repaired logging for REF and FRC
539 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
540 * Initial import of version 2.9.3 source tree
543 *********************************************************************/
549 #include <sys/types.h>
556 #ifdef FEATURE_PTHREAD
558 #endif /* def FEATURE_PTHREAD */
561 # ifndef FEATURE_PTHREAD
565 # include <windows.h>
566 # include <process.h>
567 # endif /* ndef FEATURE_PTHREAD */
570 # ifndef _WIN_CONSOLE
572 # endif /* ndef _WIN_CONSOLE */
574 #else /* ifndef _WIN32 */
576 # if !defined (__OS2__)
578 # include <sys/wait.h>
579 # endif /* ndef __OS2__ */
580 # include <sys/time.h>
581 # include <sys/stat.h>
582 # include <sys/ioctl.h>
585 #include <sys/termios.h>
596 # include <socket.h> /* BeOS has select() for sockets only. */
597 # include <OS.h> /* declarations for threads and stuff. */
600 # if defined(__EMX__) || defined(__OS2__)
601 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
606 #define bzero(B,N) memset(B,0x00,n)
621 #include "killpopup.h"
622 #include "miscutil.h"
624 #include "jbsockets.h"
629 #include "urlmatch.h"
631 const char jcc_h_rcs[] = JCC_H_VERSION;
632 const char project_h_rcs[] = PROJECT_H_VERSION;
635 struct client_state clients[1];
636 struct file_list files[1];
638 #ifdef FEATURE_STATISTICS
639 int urls_read = 0; /* total nr of urls read inc rejected */
640 int urls_rejected = 0; /* total nr of urls rejected */
641 #endif /* def FEATURE_STATISTICS */
643 #ifdef FEATURE_GRACEFUL_TERMINATION
647 static void listen_loop(void);
648 static void chat(struct client_state *csp);
650 void serve(struct client_state *csp);
651 #else /* ifndef AMIGA */
652 static void serve(struct client_state *csp);
653 #endif /* def AMIGA */
656 static int32 server_thread(void *data);
657 #endif /* def __BEOS__ */
660 #define sleep(N) Sleep(((N) * 1000))
664 #define sleep(N) DosSleep(((N) * 100))
667 #if defined(unix) || defined(__EMX__)
669 const char *pidfile = NULL;
670 int received_hup_signal = 0;
671 #endif /* defined unix */
673 /* The vanilla wafer. */
674 static const char VANILLA_WAFER[] =
675 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
676 "Do_not_send_me_any_copyrighted_information_other_than_the_"
677 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
678 "In_particular_do_not_send_me_any_cookies_that_"
679 "are_subject_to_a_claim_of_copyright_by_anybody._"
680 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
681 "(copyright_or_otherwise)_applying_to_any_cookie._";
684 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
685 /*********************************************************************
687 * Function : sig_handler
689 * Description : Signal handler for different signals.
690 * Exit gracefully on ABRT, TERM and INT
691 * or set a flag that will cause the errlog
692 * to be reopened by the main thread on HUP.
695 * 1 : the_signal = the signal cause this function to call
699 *********************************************************************/
700 static void sig_handler(int the_signal)
707 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
715 received_hup_signal = 1;
720 * We shouldn't be here, unless we catch signals
721 * in main() that we can't handle here!
723 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
731 /*********************************************************************
735 * Description : Once a connection to the client has been accepted,
736 * this function is called (via serve()) to handle the
737 * main business of the communication. When this
738 * function returns, the caller must close the client
742 * 1 : csp = Current client state (buffers, headers, etc...)
744 * Returns : On success, the number of bytes written are returned (zero
745 * indicates nothing was written). On error, -1 is returned,
746 * and errno is set appropriately. If count is zero and the
747 * file descriptor refers to a regular file, 0 will be
748 * returned without causing any other effect. For a special
749 * file, the results are not portable.
751 *********************************************************************/
752 static void chat(struct client_state *csp)
755 * This next lines are a little ugly, but they simplifies the if statements
756 * below. Basically if TOGGLE, then we want the if to test if the
757 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
758 * then we want the if to test for CSP_FLAG_FORCED , else we don't
760 #ifdef FEATURE_TOGGLE
761 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
762 #else /* ifndef FEATURE_TOGGLE */
763 # define IS_TOGGLED_ON_AND
764 #endif /* ndef FEATURE_TOGGLE */
765 #ifdef FEATURE_FORCE_LOAD
766 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
767 #else /* ifndef FEATURE_FORCE_LOAD */
768 # define IS_NOT_FORCED_AND
769 #endif /* def FEATURE_FORCE_LOAD */
771 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
773 char buf[BUFFER_SIZE];
781 int ms_iis5_hack = 0;
783 const struct forward_spec * fwd;
784 struct http_request *http;
785 int len; /* for buffer sizes */
786 #ifdef FEATURE_KILL_POPUPS
787 int block_popups; /* bool, 1==will block popups */
788 int block_popups_now = 0; /* bool, 1==currently blocking popups */
789 #endif /* def FEATURE_KILL_POPUPS */
791 int pcrs_filter; /* bool, 1==will filter through pcrs */
792 int gif_deanimate; /* bool, 1==will deanimate gifs */
794 /* Function that does the content filtering for the current request */
795 char *(*content_filter)() = NULL;
797 /* Skeleton for HTTP response, if we should intercept the request */
798 struct http_response *rsp;
803 * Read the client's request. Note that since we're not using select() we
804 * could get blocked here if a client connected, then didn't say anything!
809 len = read_socket(csp->cfd, buf, sizeof(buf));
811 if (len <= 0) break; /* error! */
814 * If there is no memory left for buffering the
815 * request, there is nothing we can do but hang up
817 if (add_to_iob(csp, buf, len))
822 req = get_header(csp);
826 break; /* no HTTP request! */
831 continue; /* more to come! */
834 #ifdef FEATURE_FORCE_LOAD
835 /* If this request contains the FORCE_PREFIX,
836 * better get rid of it now and set the force flag --oes
839 if (strstr(req, FORCE_PREFIX))
841 strclean(req, FORCE_PREFIX);
842 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
843 csp->flags |= CSP_FLAG_FORCED;
846 #endif /* def FEATURE_FORCE_LOAD */
848 parse_http_request(req, http, csp);
853 if (http->cmd == NULL)
855 strcpy(buf, CHEADER);
856 write_socket(csp->cfd, buf, strlen(buf));
858 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
863 /* decide how to route the HTTP request */
865 if ((fwd = forward_url(http, csp)) == NULL)
867 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
868 /* Never get here - LOG_LEVEL_FATAL causes program exit */
871 /* build the http request to send to the server
872 * we have to do one of the following:
874 * create = use the original HTTP request to create a new
875 * HTTP request that has either the path component
876 * without the http://domainspec (w/path) or the
877 * full orininal URL (w/url)
878 * Note that the path and/or the HTTP version may
879 * have been altered by now.
881 * connect = Open a socket to the host:port of the server
882 * and short-circuit server and client socket.
884 * pass = Pass the request unchanged if forwarding a CONNECT
885 * request to a parent proxy. Note that we'll be sending
886 * the CFAIL message ourselves if connecting to the parent
887 * fails, but we won't send a CSUCCEED message if it works,
888 * since that would result in a double message (ours and the
889 * parent's). After sending the request to the parent, we simply
895 * +--------+--------+
897 * 0 | create | connect|
899 * Forwarding +--------+--------+
901 * 1 | create | pass |
903 * +--------+--------+
908 * Determine the actions for this URL
910 #ifdef FEATURE_TOGGLE
911 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
913 /* Most compatible set of actions (i.e. none) */
914 init_current_action(csp->action);
917 #endif /* ndef FEATURE_TOGGLE */
919 url_actions(http, csp);
924 * Check if a CONNECT request is allowable:
925 * In the absence of a +limit-connect action, allow only port 443.
926 * If there is an action, allow whatever matches the specificaton.
930 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
931 || (csp->action->flags & ACTION_LIMIT_CONNECT
932 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
934 strcpy(buf, CFORBIDDEN);
935 write_socket(csp->cfd, buf, strlen(buf));
937 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
938 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
946 * Downgrade http version from 1.1 to 1.0 if +downgrade
949 if ( (http->ssl == 0)
950 && (!strcmpic(http->ver, "HTTP/1.1"))
951 && (csp->action->flags & ACTION_DOWNGRADE))
954 http->ver = strdup("HTTP/1.0");
956 if (http->ver == NULL)
958 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
963 * Save a copy of the original request for logging
965 http->ocmd = strdup(http->cmd);
967 if (http->ocmd == NULL)
969 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
973 * (Re)build the HTTP request for non-SSL requests.
974 * If forwarding, use the whole URL, else, use only the path.
980 http->cmd = strdup(http->gpc);
981 string_append(&http->cmd, " ");
983 if (fwd->forward_host)
985 string_append(&http->cmd, http->url);
989 string_append(&http->cmd, http->path);
991 string_append(&http->cmd, " ");
992 string_append(&http->cmd, http->ver);
994 if (http->cmd == NULL)
996 log_error(LOG_LEVEL_FATAL, "Out of memory writing HTTP command");
998 log_error(LOG_LEVEL_HEADER, "New HTTP Request-Line: %s", http->cmd);
1000 enlist(csp->headers, http->cmd);
1004 * If the user has not supplied any wafers, and the user has not
1005 * told us to suppress the vanilla wafer, then send the vanilla wafer.
1007 if (list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
1008 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
1010 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
1014 #ifdef FEATURE_KILL_POPUPS
1015 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
1016 #endif /* def FEATURE_KILL_POPUPS */
1018 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
1019 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
1021 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
1023 /* grab the rest of the client's headers */
1027 if ( ( ( p = get_header(csp) ) != NULL) && ( *p == '\0' ) )
1029 len = read_socket(csp->cfd, buf, sizeof(buf));
1032 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
1037 * If there is no memory left for buffering the
1038 * request, there is nothing we can do but hang up
1040 if (add_to_iob(csp, buf, len))
1047 if (p == NULL) break;
1049 enlist(csp->headers, p);
1054 * We have a request. Now, check to see if we need to
1055 * intercept it, i.e. If ..
1059 /* We may not forward the request by rfc2616 sect 14.31 */
1060 (NULL != (rsp = direct_response(csp)))
1062 /* or a CGI call was detected and answered */
1063 || (NULL != (rsp = dispatch_cgi(csp)))
1065 /* or we are enabled and... */
1066 || (IS_ENABLED_AND (
1068 /* ..the request was blocked */
1069 ( NULL != (rsp = block_url(csp)))
1071 /* ..or untrusted */
1072 #ifdef FEATURE_TRUST
1073 || ( NULL != (rsp = trust_url(csp)))
1074 #endif /* def FEATURE_TRUST */
1076 /* ..or a fast redirect kicked in */
1077 #ifdef FEATURE_FAST_REDIRECTS
1078 || (((csp->action->flags & ACTION_FAST_REDIRECTS) != 0) &&
1079 (NULL != (rsp = redirect_url(csp))))
1080 #endif /* def FEATURE_FAST_REDIRECTS */
1084 /* Write the answer to the client */
1085 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1086 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1088 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1091 #ifdef FEATURE_STATISTICS
1092 /* Count as a rejected request */
1093 csp->flags |= CSP_FLAG_REJECTED;
1094 #endif /* def FEATURE_STATISTICS */
1096 /* Log (FIXME: All intercept reasons apprear as "crunch" with Status 200) */
1097 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
1098 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
1100 /* Clean up and return */
1101 free_http_response(rsp);
1105 hdr = sed(client_patterns, add_client_headers, csp);
1108 /* FIXME Should handle error properly */
1109 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1112 list_remove_all(csp->headers);
1114 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1116 if (fwd->forward_host)
1118 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1119 fwd->forward_host, fwd->forward_port, http->hostport);
1123 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1126 /* here we connect to the server, gateway, or the forwarder */
1128 csp->sfd = forwarded_connect(fwd, http, csp);
1130 if (csp->sfd == JB_INVALID_SOCKET)
1132 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1135 if (errno == EINVAL)
1137 rsp = error_response(csp, "no-such-domain", errno);
1139 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
1140 csp->ip_addr_str, http->ocmd);
1144 rsp = error_response(csp, "connect-failed", errno);
1146 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1147 csp->ip_addr_str, http->ocmd);
1151 /* Write the answer to the client */
1154 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1155 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1157 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1161 free_http_response(rsp);
1166 log_error(LOG_LEVEL_CONNECT, "OK");
1168 if (fwd->forward_host || (http->ssl == 0))
1170 /* write the client's (modified) header to the server
1171 * (along with anything else that may be in the buffer)
1174 if (write_socket(csp->sfd, hdr, strlen(hdr))
1175 || (flush_socket(csp->sfd, csp) < 0))
1177 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1180 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1181 csp->ip_addr_str, http->ocmd);
1183 rsp = error_response(csp, "connect-failed", errno);
1187 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1188 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1190 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1194 free_http_response(rsp);
1202 * We're running an SSL tunnel and we're not forwarding,
1203 * so just send the "connect succeeded" message to the
1204 * client, flush the rest, and get out of the way.
1206 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1207 csp->ip_addr_str, http->ocmd);
1209 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
1217 /* we're finished with the client's header */
1220 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1222 /* pass data between the client and server
1223 * until one or the other shuts down the connection.
1232 * FD_ZERO here seems to point to an errant macro which crashes.
1233 * So do this by hand for now...
1235 memset(&rfds,0x00,sizeof(fd_set));
1239 FD_SET(csp->cfd, &rfds);
1240 FD_SET(csp->sfd, &rfds);
1242 n = select((int)maxfd+1, &rfds, NULL, NULL, NULL);
1246 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1250 /* this is the body of the browser's request
1251 * just read it and write it.
1254 if (FD_ISSET(csp->cfd, &rfds))
1256 len = read_socket(csp->cfd, buf, sizeof(buf));
1260 break; /* "game over, man" */
1263 if (write_socket(csp->sfd, buf, (size_t)len))
1265 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1272 * The server wants to talk. It could be the header or the body.
1273 * If `hdr' is null, then it's the header otherwise it's the body.
1274 * FIXME: Does `hdr' really mean `host'? No.
1278 if (FD_ISSET(csp->sfd, &rfds))
1281 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1285 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1287 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1288 csp->ip_addr_str, http->ocmd);
1290 rsp = error_response(csp, "connect-failed", errno);
1294 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1295 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1297 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1301 free_http_response(rsp);
1305 /* Add a trailing zero. This lets filter_popups
1306 * use string operations.
1310 #ifdef FEATURE_KILL_POPUPS
1311 /* Filter the popups on this read. */
1312 if (block_popups_now)
1314 filter_popups(buf, csp);
1316 #endif /* def FEATURE_KILL_POPUPS */
1318 /* Normally, this would indicate that we've read
1319 * as much as the server has sent us and we can
1320 * close the client connection. However, Microsoft
1321 * in its wisdom has released IIS/5 with a bug that
1322 * prevents it from sending the trailing \r\n in
1323 * a 302 redirect header (and possibly other headers).
1324 * To work around this if we've haven't parsed
1325 * a full header we'll append a trailing \r\n
1326 * and see if this now generates a valid one.
1328 * This hack shouldn't have any impacts. If we've
1329 * already transmitted the header or if this is a
1330 * SSL connection, then we won't bother with this
1331 * hack. So we only work on partially received
1332 * headers. If we append a \r\n and this still
1333 * doesn't generate a valid header, then we won't
1334 * transmit anything to the client.
1339 if (server_body || http->ssl)
1342 * If we have been buffering up the document,
1343 * now is the time to apply content modification
1344 * and send the result to the client.
1349 * If the content filter fails, use the original
1350 * buffer and length.
1351 * (see p != NULL ? p : csp->iob->cur below)
1353 if (NULL == (p = (*content_filter)(csp)))
1355 csp->content_length = csp->iob->eod - csp->iob->cur;
1358 hdr = sed(server_patterns, add_server_headers, csp);
1361 /* FIXME Should handle error properly */
1362 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1365 if (write_socket(csp->cfd, hdr, strlen(hdr))
1366 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
1368 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1378 break; /* "game over, man" */
1382 * This is NOT the body, so
1383 * Let's pretend the server just sent us a blank line.
1385 len = sprintf(buf, "\r\n");
1388 * Now, let the normal header parsing algorithm below do its
1389 * job. If it fails, we'll exit instead of continuing.
1396 * If this is an SSL connection or we're in the body
1397 * of the server document, just write it to the client,
1398 * unless we need to buffer the body for later content-filtering
1401 if (server_body || http->ssl)
1406 * If there is no memory left for buffering the content, or the buffer limit
1407 * has been reached, switch to non-filtering mode, i.e. make & write the
1408 * header, flush the iob and buf, and get out of the way.
1410 if (add_to_iob(csp, buf, len))
1415 log_error(LOG_LEVEL_ERROR, "Flushing header and buffers. Stepping back from filtering.");
1417 hdr = sed(server_patterns, add_server_headers, csp);
1421 * Memory is too tight to even generate the header.
1422 * Send our static "Out-of-memory" page.
1424 log_error(LOG_LEVEL_ERROR, "Out of memory while trying to flush.");
1425 rsp = cgi_error_memory();
1427 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1428 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1430 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1435 hdrlen = strlen(hdr);
1437 if (write_socket(csp->cfd, hdr, hdrlen)
1438 || ((flushed = flush_socket(csp->cfd, csp)) < 0)
1439 || (write_socket(csp->cfd, buf, len)))
1441 log_error(LOG_LEVEL_CONNECT, "Flush header and buffers to client failed: %E");
1447 byte_count += hdrlen + flushed + len;
1449 content_filter = NULL;
1456 if (write_socket(csp->cfd, buf, (size_t)len))
1458 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
1467 /* we're still looking for the end of the
1468 * server's header ... (does that make header
1469 * parsing an "out of body experience" ?
1473 * buffer up the data we just read. If that fails,
1474 * there's little we can do but send our static
1475 * out-of-memory page.
1477 if (add_to_iob(csp, buf, len))
1479 log_error(LOG_LEVEL_ERROR, "Out of memory while looking for end of server headers.");
1480 rsp = cgi_error_memory();
1482 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1483 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1485 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1490 /* get header lines from the iob */
1492 while ((p = get_header(csp)) != NULL)
1496 /* see following note */
1499 enlist(csp->headers, p);
1503 /* NOTE: there are no "empty" headers so
1504 * if the pointer `p' is not NULL we must
1505 * assume that we reached the end of the
1506 * buffer before we hit the end of the header.
1513 /* Well, we tried our MS IIS/5
1514 * hack and it didn't work.
1515 * The header is incomplete
1516 * and there isn't anything
1517 * we can do about it.
1523 /* Since we have to wait for
1524 * more from the server before
1525 * we can parse the headers
1526 * we just continue here.
1532 /* we have now received the entire header.
1533 * filter it and send the result to the client
1536 hdr = sed(server_patterns, add_server_headers, csp);
1539 /* FIXME Should handle error properly */
1540 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1543 #ifdef FEATURE_KILL_POPUPS
1544 /* Start blocking popups if appropriate. */
1546 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1547 !http->ssl && /* We talk plaintext */
1548 block_popups) /* Policy allows */
1550 block_popups_now = 1;
1552 * Filter the part of the body that came in the same read
1553 * as the last headers:
1555 filter_popups(csp->iob->cur, csp);
1558 #endif /* def FEATURE_KILL_POPUPS */
1560 /* Buffer and pcrs filter this if appropriate. */
1562 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1563 !http->ssl && /* We talk plaintext */
1564 pcrs_filter) /* Policy allows */
1566 content_filter = pcrs_filter_response;
1569 /* Buffer and gif_deanimate this if appropriate. */
1571 if ((csp->content_type & CT_GIF) && /* It's a image/gif MIME-Type */
1572 !http->ssl && /* We talk plaintext */
1573 gif_deanimate) /* Policy allows */
1575 content_filter = gif_deanimate_response;
1579 * Only write if we're not buffering for content modification
1581 if (!content_filter)
1583 /* write the server's (modified) header to
1584 * the client (along with anything else that
1585 * may be in the buffer)
1588 if (write_socket(csp->cfd, hdr, strlen(hdr))
1589 || ((len = flush_socket(csp->cfd, csp)) < 0))
1591 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1593 /* the write failed, so don't bother
1594 * mentioning it to the client...
1595 * it probably can't hear us anyway.
1604 /* we're finished with the server's header */
1609 /* If this was a MS IIS/5 hack then it means
1610 * the server has already closed the
1611 * connection. Nothing more to read. Time
1622 return; /* huh? we should never get here */
1625 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
1626 csp->ip_addr_str, http->ocmd, byte_count);
1630 /*********************************************************************
1634 * Description : This is little more than chat. We only "serve" to
1635 * to close any socket that chat may have opened.
1638 * 1 : csp = Current client state (buffers, headers, etc...)
1642 *********************************************************************/
1644 void serve(struct client_state *csp)
1645 #else /* ifndef AMIGA */
1646 static void serve(struct client_state *csp)
1647 #endif /* def AMIGA */
1650 close_socket(csp->cfd);
1652 if (csp->sfd != JB_INVALID_SOCKET)
1654 close_socket(csp->sfd);
1657 csp->flags &= ~CSP_FLAG_ACTIVE;
1663 /*********************************************************************
1665 * Function : server_thread
1667 * Description : We only exist to call `serve' in a threaded environment.
1670 * 1 : data = Current client state (buffers, headers, etc...)
1672 * Returns : Always 0.
1674 *********************************************************************/
1675 static int32 server_thread(void *data)
1677 serve((struct client_state *) data);
1684 /*********************************************************************
1688 * Description : Print usage info & exit.
1690 * Parameters : Pointer to argv[0] for identifying ourselves
1694 *********************************************************************/
1695 void usage(const char *myname)
1697 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n"
1698 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
1699 "Aborting.\n", myname);
1706 /*********************************************************************
1710 * Description : Load the config file and start the listen loop.
1711 * This function is a lot more *sane* with the `load_config'
1712 * and `listen_loop' functions; although it stills does
1713 * a *little* too much for my taste.
1716 * 1 : argc = Number of parameters (including $0).
1717 * 2 : argv = Array of (char *)'s to the parameters.
1719 * Returns : 1 if : can't open config file, unrecognized directive,
1720 * stats requested in multi-thread mode, can't open the
1721 * log file, can't open the jar file, listen port is invalid,
1722 * any load fails, and can't bind port.
1724 * Else main never returns, the process must be signaled
1725 * to terminate execution. Or, on Windows, use the
1726 * "File", "Exit" menu option.
1728 *********************************************************************/
1730 int real_main(int argc, const char *argv[])
1732 int main(int argc, const char *argv[])
1737 struct passwd *pw = NULL;
1738 struct group *grp = NULL;
1746 #if !defined(_WIN32)
1754 * Parse the command line arguments
1756 while (++argc_pos < argc)
1758 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1760 if (strcmp(argv[argc_pos], "--help") == 0)
1765 else if(strcmp(argv[argc_pos], "--version") == 0)
1767 printf("Privoxy version " VERSION " (" HOME_PAGE_URL ")\n");
1771 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
1776 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
1778 if (++argc_pos == argc) usage(argv[0]);
1779 pidfile = strdup(argv[argc_pos]);
1782 else if (strcmp(argv[argc_pos], "--user" ) == 0)
1784 if (++argc_pos == argc) usage(argv[argc_pos]);
1786 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
1789 if (NULL == (grp = getgrnam(p)))
1791 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
1795 if (NULL == (pw = getpwnam(argv[argc_pos])))
1797 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
1800 if (p != NULL) *--p = '\0';
1802 #endif /* defined(unix) */
1804 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
1806 configfile = argv[argc_pos];
1809 } /* -END- while (more arguments) */
1812 if ( *configfile != '/' )
1816 /* make config-filename absolute here */
1817 if ( !(basedir = getcwd( NULL, 1024 )))
1819 perror("get working dir failed");
1823 if ( !(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 )))
1825 perror("malloc failed");
1828 strcpy( abs_file, basedir );
1829 strcat( abs_file, "/" );
1830 strcat( abs_file, configfile );
1831 configfile = abs_file;
1833 #endif /* defined unix */
1837 clients->next = NULL;
1841 #elif defined(_WIN32)
1846 * Unix signal handling
1848 * Catch the abort, interrupt and terminate signals for a graceful exit
1849 * Catch the hangup signal so the errlog can be reopened.
1850 * Ignore the broken pipe and child signals
1851 * FIXME: Isn't ignoring the default for SIGCHLD anyway and why ignore SIGPIPE?
1853 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1856 const int catched_signals[] = { SIGABRT, SIGTERM, SIGINT, SIGHUP, 0 };
1857 const int ignored_signals[] = { SIGPIPE, SIGCHLD, 0 };
1859 for (idx = 0; catched_signals[idx] != 0; idx++)
1861 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
1863 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
1867 for (idx = 0; ignored_signals[idx] != 0; idx++)
1869 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
1871 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
1876 #else /* ifdef _WIN32 */
1877 # ifdef _WIN_CONSOLE
1879 * We *are* in a windows console app.
1880 * Print a verbose messages about FAQ's and such
1882 printf(win32_blurb);
1883 # endif /* def _WIN_CONSOLE */
1884 #endif /* def _WIN32 */
1887 /* Initialize the CGI subsystem */
1888 cgi_init_error_messages();
1891 * If runnig on unix and without the --nodaemon
1892 * option, become a daemon. I.e. fork, detach
1893 * from tty and get process group leadership
1906 if ( pid < 0 ) /* error */
1911 else if ( pid != 0 ) /* parent */
1916 * must check for errors
1917 * child died due to missing files aso
1920 wpid = waitpid( pid, &status, WNOHANG );
1929 /* Should be more portable, but not as well tested */
1934 #else /* ndef __FreeBSD__ */
1936 #endif /* ndef __FreeBSD__ */
1937 fd = open("/dev/tty", O_RDONLY);
1940 /* no error check here */
1941 ioctl( fd, TIOCNOTTY,0 );
1945 /* FIXME: should close stderr (fd 2) here too, but the test
1947 * and load config file is done in listen_loop() and puts
1948 * some messages on stderr there.
1955 } /* -END- if (!no_daemon) */
1958 * As soon as we have written the PID file, we can switch
1959 * to the user and group ID indicated by the --user option
1965 if (((NULL != grp) && setgid(grp->gr_gid)) || (setgid(pw->pw_gid)))
1967 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
1969 if (setuid(pw->pw_uid))
1971 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
1975 #endif /* defined unix */
1985 /*********************************************************************
1987 * Function : bind_port_helper
1989 * Description : Bind the listen port. Handles logging, and aborts
1993 * 1 : config = Privoxy configuration. Specifies port
1996 * Returns : Port that was opened.
1998 *********************************************************************/
1999 static jb_socket bind_port_helper(struct configuration_spec * config)
2004 if ( (config->haddr != NULL)
2005 && (config->haddr[0] == '1')
2006 && (config->haddr[1] == '2')
2007 && (config->haddr[2] == '7')
2008 && (config->haddr[3] == '.') )
2010 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
2013 else if (config->haddr == NULL)
2015 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
2020 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
2021 config->hport, config->haddr);
2024 result = bind_port(config->haddr, config->hport, &bfd);
2031 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2032 "There may be another Privoxy or some other "
2033 "proxy running on port %d",
2034 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
2035 config->hport, config->hport);
2038 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
2039 "The hostname is not resolvable",
2040 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2043 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
2044 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
2047 /* shouldn't get here */
2048 return JB_INVALID_SOCKET;
2051 config->need_bind = 0;
2057 /*********************************************************************
2059 * Function : listen_loop
2061 * Description : bind the listen port and enter a "FOREVER" listening loop.
2067 *********************************************************************/
2068 static void listen_loop(void)
2070 struct client_state *csp = NULL;
2072 struct configuration_spec * config;
2074 config = load_config();
2076 bfd = bind_port_helper(config);
2078 #ifdef FEATURE_GRACEFUL_TERMINATION
2079 while (!g_terminate)
2084 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
2085 while (waitpid(-1, NULL, WNOHANG) > 0)
2087 /* zombie children */
2089 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
2092 * Free data that was used by died threads
2098 * Re-open the errlog after HUP signal
2100 if (received_hup_signal)
2102 init_error_log(Argv[0], config->logfile, config->debug);
2103 received_hup_signal = 0;
2108 #ifdef FEATURE_COOKIE_JAR
2110 * Need a workaround here: we have to fclose() the jarfile, or we die because it's
2111 * already open. I think unload_configfile() is not being run, which should do
2112 * this work. Until that can get resolved, we'll use this workaround.
2116 if (csp->config->jar)
2118 fclose(csp->config->jar);
2119 csp->config->jar = NULL;
2121 #endif /* FEATURE_COOKIE_JAR */
2122 #endif /* __OS2__ */
2124 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
2126 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
2130 csp->flags |= CSP_FLAG_ACTIVE;
2131 csp->sfd = JB_INVALID_SOCKET;
2133 csp->config = config = load_config();
2135 if ( config->need_bind )
2138 * Since we were listening to the "old port", we will not see
2139 * a "listen" param change until the next IJB request. So, at
2140 * least 1 more request must be made for us to find the new
2141 * setting. I am simply closing the old socket and binding the
2144 * Which-ever is correct, we will serve 1 more page via the
2145 * old settings. This should probably be a "show-proxy-args"
2146 * request. This should not be a so common of an operation
2147 * that this will hurt people's feelings.
2152 bfd = bind_port_helper(config);
2155 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
2157 if (!accept_connection(csp, bfd))
2159 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
2172 log_error(LOG_LEVEL_CONNECT, "OK");
2175 #ifdef FEATURE_TOGGLE
2178 csp->flags |= CSP_FLAG_TOGGLED_ON;
2180 #endif /* def FEATURE_TOGGLE */
2182 if (run_loader(csp))
2184 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
2185 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2189 if (block_acl(NULL,csp))
2191 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
2192 close_socket(csp->cfd);
2196 #endif /* def FEATURE_ACL */
2198 /* add it to the list of clients */
2199 csp->next = clients->next;
2200 clients->next = csp;
2202 if (config->multi_threaded)
2206 /* this is a switch () statment in the C preprocessor - ugh */
2207 #undef SELECTED_ONE_OPTION
2209 /* Use Pthreads in preference to native code */
2210 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
2211 #define SELECTED_ONE_OPTION
2213 pthread_t the_thread;
2214 pthread_attr_t attrs;
2216 pthread_attr_init(&attrs);
2217 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
2218 child_id = (pthread_create(&the_thread, &attrs,
2219 (void*)serve, csp) ? -1 : 0);
2220 pthread_attr_destroy(&attrs);
2224 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
2225 #define SELECTED_ONE_OPTION
2226 child_id = _beginthread(
2227 (void (*)(void *))serve,
2232 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
2233 #define SELECTED_ONE_OPTION
2234 child_id = _beginthread(
2235 (void(* _Optlink)(void*))serve,
2241 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
2242 #define SELECTED_ONE_OPTION
2244 thread_id tid = spawn_thread
2245 (server_thread, "server", B_NORMAL_PRIORITY, csp);
2247 if ((tid >= 0) && (resume_thread(tid) == B_OK))
2249 child_id = (int) tid;
2258 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2259 #define SELECTED_ONE_OPTION
2260 csp->cfd = ReleaseSocket(csp->cfd, -1);
2261 if((child_id = (int)CreateNewProcTags(
2262 NP_Entry, (ULONG)server_thread,
2263 NP_Output, Output(),
2264 NP_CloseOutput, FALSE,
2265 NP_Name, (ULONG)"privoxy child",
2266 NP_StackSize, 200*1024,
2270 ((struct Task *)child_id)->tc_UserData = csp;
2271 Signal((struct Task *)child_id, SIGF_SINGLE);
2276 #if !defined(SELECTED_ONE_OPTION)
2279 /* This block is only needed when using fork().
2280 * When using threads, the server thread was
2281 * created and run by the call to _beginthread().
2283 if (child_id == 0) /* child */
2289 else if (child_id > 0) /* parent */
2291 /* in a fork()'d environment, the parent's
2292 * copy of the client socket and the CSP
2296 #if !defined(_WIN32) && defined(__CYGWIN__)
2298 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
2299 close_socket(csp->cfd);
2300 csp->flags &= ~CSP_FLAG_ACTIVE;
2304 #undef SELECTED_ONE_OPTION
2305 /* end of cpp switch () */
2307 if (child_id < 0) /* failed */
2309 char buf[BUFFER_SIZE];
2311 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
2313 sprintf(buf , "Privoxy: can't fork: errno = %d", errno);
2315 write_socket(csp->cfd, buf, strlen(buf));
2316 close_socket(csp->cfd);
2317 csp->flags &= ~CSP_FLAG_ACTIVE;
2328 /* NOTREACHED unless FEATURE_GRACEFUL_TERMINATION is defined */
2330 /* Clean up. Aim: free all memory (no leaks) */
2331 #ifdef FEATURE_GRACEFUL_TERMINATION
2333 log_error(LOG_LEVEL_ERROR, "Graceful termination requested");
2335 unload_current_config_file();
2336 unload_current_actions_file();
2337 unload_current_re_filterfile();
2338 #ifdef FEATURE_TRUST
2339 unload_current_trust_file();
2342 if (config->multi_threaded)
2349 } while ((clients->next != NULL) && (--i > 0));
2353 log_error(LOG_LEVEL_ERROR, "Graceful termination failed - still some live clients after 1 minute wait.");
2362 #if defined(_WIN32) && !defined(_WIN_CONSOLE)
2363 /* Cleanup - remove taskbar icon etc. */
2368 #endif /* FEATURE_GRACEFUL_TERMINATION */