1 const char jcc_rcs[] = "$Id: jcc.c,v 1.79 2002/03/09 20:03:52 jongfoster Exp $";
2 /*********************************************************************
4 * File : $Source: /cvsroot/ijbswa/current/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 * IJBSWA team. http://ijbswa.sourceforge.net
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 1.79 2002/03/09 20:03:52 jongfoster
37 * - Making various functions return int rather than size_t.
38 * (Undoing a recent change). Since size_t is unsigned on
39 * Windows, functions like read_socket that return -1 on
40 * error cannot return a size_t.
42 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
43 * crashes, and also frequently caused JB to jump to 100%
44 * CPU and stay there. (Because it thought it had just
45 * read ((unsigned)-1) == 4Gb of data...)
47 * - The signature of write_socket has changed, it now simply
48 * returns success=0/failure=nonzero.
50 * - Trying to get rid of a few warnings --with-debug on
51 * Windows, I've introduced a new type "jb_socket". This is
52 * used for the socket file descriptors. On Windows, this
53 * is SOCKET (a typedef for unsigned). Everywhere else, it's
54 * an int. The error value can't be -1 any more, so it's
55 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
56 * Windows it maps to the #define INVALID_SOCKET.)
58 * - The signature of bind_port has changed.
60 * Revision 1.78 2002/03/08 21:35:04 oes
61 * Added optional group supplement to --user option. Will now use default group of user if no group given
63 * Revision 1.77 2002/03/07 03:52:06 oes
64 * - Fixed compiler warnings etc
65 * - Improved handling of failed DNS lookups
67 * Revision 1.76 2002/03/06 22:54:35 jongfoster
68 * Automated function-comment nitpicking.
70 * Revision 1.75 2002/03/06 10:02:19 oes
71 * Fixed stupid bug when --user was not given
73 * Revision 1.74 2002/03/06 00:49:31 jongfoster
74 * Fixing warning on Windows
75 * Making #ifdefs that refer to the same variable consistently
76 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
78 * Revision 1.73 2002/03/05 23:57:30 hal9
79 * Stray character 's' on line 1618 was breaking build.
81 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
82 * - Re-enable OS/2 building after new parms were added
83 * - Fix false out of memory report when resolving CGI templates when no IP
84 * address is available of failed attempt (a la no such domain)
86 * Revision 1.71 2002/03/05 18:13:56 oes
89 * Revision 1.70 2002/03/05 04:52:42 oes
90 * Deleted non-errlog debugging code
92 * Revision 1.69 2002/03/04 23:50:00 jongfoster
93 * Splitting off bind_port() call into bind_port_helper(), with
96 * Revision 1.68 2002/03/04 20:17:32 oes
99 * Revision 1.67 2002/03/04 18:18:57 oes
100 * - Removed _DEBUG mode
101 * - Cleand up cmdline parsing
102 * - Introduced --no-daemon, --pidfile options
103 * - Cleaned up signal handling:
104 * - Terminate cleanly on INT, TERM and ABRT
105 * - Schedule logfile for re-opening on HUP
106 * - Ignore CHLD and PIPE
107 * - Leave the rest with their default handlers
108 * - Uniform handler registration
109 * - Added usage() function
110 * - Played styleguide police
112 * Revision 1.66 2002/03/03 15:06:55 oes
113 * Re-enabled automatic config reloading
115 * Revision 1.65 2002/03/03 14:49:11 oes
116 * Fixed CLF logging: Now uses client's original HTTP request
118 * Revision 1.64 2002/03/03 09:18:03 joergs
119 * Made jumbjuster work on AmigaOS again.
121 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
122 * Clean up a little CRLF unpleasantness that suddenly appeared
124 * Revision 1.62 2002/02/20 23:17:23 jongfoster
125 * Detecting some out-of memory conditions and exiting with a log message.
127 * Revision 1.61 2002/01/17 21:01:52 jongfoster
128 * Moving all our URL and URL pattern parsing code to urlmatch.c.
130 * Revision 1.60 2001/12/30 14:07:32 steudten
131 * - Add signal handling (unix)
132 * - Add SIGHUP handler (unix)
133 * - Add creation of pidfile (unix)
134 * - Add action 'top' in rc file (RH)
135 * - Add entry 'SIGNALS' to manpage
136 * - Add exit message to logfile (unix)
138 * Revision 1.59 2001/12/13 14:07:18 oes
139 * Fixed Bug: 503 error page now sent OK
141 * Revision 1.58 2001/11/30 23:37:24 jongfoster
142 * Renaming the Win32 config file to config.txt - this is almost the
143 * same as the corresponding UNIX name "config"
145 * Revision 1.57 2001/11/16 00:47:43 jongfoster
146 * Changing the tty-disconnection code to use setsid().
148 * Revision 1.56 2001/11/13 20:20:54 jongfoster
149 * Tabs->spaces, fixing a bug with missing {} around an if()
151 * Revision 1.55 2001/11/13 20:14:53 jongfoster
152 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
154 * Revision 1.54 2001/11/07 00:03:14 steudten
155 * Give reliable return value if an error
156 * occurs not just 0 with new daemon mode.
158 * Revision 1.53 2001/11/05 21:41:43 steudten
159 * Add changes to be a real daemon just for unix os.
160 * (change cwd to /, detach from controlling tty, set
161 * process group and session leader to the own process.
163 * Add some fatal-error log message for failed malloc().
164 * Add '-d' if compiled with 'configure --with-debug' to
165 * enable debug output.
167 * Revision 1.52 2001/10/26 20:11:20 jongfoster
168 * Fixing type mismatch
170 * Revision 1.51 2001/10/26 17:38:28 oes
173 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
174 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
175 * threads to call select() simultaneously. So, it's time to do a real, live,
176 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
177 * (native). Both versions will work, but using __OS2__ offers multi-threading.
179 * Revision 1.49 2001/10/23 21:41:35 jongfoster
180 * Added call to initialize the (statically-allocated of course)
181 * "out of memory" CGI response.
183 * Revision 1.48 2001/10/10 19:56:46 jongfoster
184 * Moving some code that wasn't cookie-related out of an #ifdef
187 * Revision 1.47 2001/10/10 16:44:36 oes
188 * Added CONNECT destination port limitation check
190 * Revision 1.46 2001/10/08 15:17:41 oes
191 * Re-enabled SSL forwarding
193 * Revision 1.45 2001/10/07 15:42:11 oes
194 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
196 * Moved downgrading of the HTTP version from parse_http_request to
197 * chat(), since we can't decide if it is necessary before we have
198 * determined the actions for the URL. The HTTP command is now
199 * *always* re-built so the repairs need no longer be special-cased.
201 * filter_popups now gets a csp pointer so it can raise the new
202 * CSP_FLAG_MODIFIED flag.
206 * Added configurable size limit for the IOB. If the IOB grows so
207 * large that the next read would exceed the limit, the header
208 * is generated, and the header & unfiltered buffer are flushed
209 * to the client. Chat then continues in non-buffering,
210 * non-filtering body mode.
212 * Revision 1.44 2001/10/02 18:13:57 oes
215 * Revision 1.43 2001/10/02 15:32:13 oes
216 * Moved generation of hdr
218 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
219 * Cleaning up 2 compiler warnings on OS/2.
221 * Revision 1.41 2001/09/16 17:05:14 jongfoster
222 * Removing unused #include showarg.h
224 * Revision 1.40 2001/09/16 15:41:45 jongfoster
225 * Fixing signed/unsigned comparison warning.
227 * Revision 1.39 2001/09/16 13:21:27 jongfoster
228 * Changes to use new list functions.
230 * Revision 1.38 2001/09/16 13:01:46 jongfoster
231 * Removing redundant function call that zeroed zalloc()'d memory.
233 * Revision 1.37 2001/09/10 11:12:24 oes
234 * Deleted unused variable
236 * Revision 1.36 2001/09/10 10:56:15 oes
237 * Silenced compiler warnings
239 * Revision 1.35 2001/07/31 14:44:22 oes
240 * Deleted unused size parameter from filter_popups()
242 * Revision 1.34 2001/07/30 22:08:36 jongfoster
243 * Tidying up #defines:
244 * - All feature #defines are now of the form FEATURE_xxx
245 * - Permanently turned off WIN_GUI_EDIT
246 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
248 * Revision 1.33 2001/07/29 19:32:00 jongfoster
249 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
251 * Revision 1.32 2001/07/29 18:47:05 jongfoster
252 * Adding missing #include "loadcfg.h"
254 * Revision 1.31 2001/07/29 12:17:48 oes
255 * Applied pthread fix by Paul Lieverse
257 * Revision 1.30 2001/07/25 22:57:13 jongfoster
258 * __BEOS__ no longer overrides FEATURE_PTHREAD.
259 * This is because FEATURE_PTHREAD will soon be widely used, so I
260 * want to keep it simple.
262 * Revision 1.29 2001/07/24 12:47:06 oes
263 * Applied BeOS support update by Eugenia
265 * Revision 1.28 2001/07/23 13:26:12 oes
266 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
268 * Revision 1.27 2001/07/19 19:09:47 haroon
269 * - Added code to take care of the situation where while processing the first
270 * server response (which includes the server header), after finding the end
271 * of the headers we were not looking past the end of the headers for
272 * content modification. I enabled it for filter_popups.
273 * Someone else should look to see if other similar operations should be
274 * done to the discarded portion of the buffer.
276 * Note 2001/07/20: No, the other content modification mechanisms will process
277 * the whole iob later anyway. --oes
279 * Revision 1.26 2001/07/18 12:31:36 oes
282 * Revision 1.25 2001/07/15 19:43:49 jongfoster
283 * Supports POSIX threads.
284 * Also removed some unused #includes.
286 * Revision 1.24 2001/07/13 14:00:40 oes
287 * - Generic content modification scheme:
288 * Each feature has its own applicability flag that is set
289 * from csp->action->flags.
290 * Replaced the "filtering" int flag , by a function pointer
291 * "content_filter" to the function that will do the content
292 * modification. If it is != NULL, the document will be buffered
293 * and processed through *content_filter, which must set
294 * csp->content_length and return a modified copy of the body
295 * or return NULL (on failiure).
296 * - Changed csp->is_text to the more generic bitmap csp->content_type
297 * which can currently take the valued CT_TEXT or CT_GIF
299 * - Removed all #ifdef PCRS
301 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
302 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
303 * the `block_acl' call. This prevents a compilation error when the user
304 * does not wish to use the "ACL" feature.
306 * Revision 1.22 2001/06/29 21:45:41 oes
307 * Indentation, CRLF->LF, Tab-> Space
309 * Revision 1.21 2001/06/29 13:29:36 oes
310 * - Cleaned up, improved comments
311 * - Unified all possible interceptors (CGI,
312 * block, trust, fast_redirect) in one
313 * place, with one (CGI) answer generation
314 * mechansim. Much clearer now.
315 * - Removed the GIF image generation, which
316 * is now done in filters.c:block_url()
317 * - Made error conditions like domain lookup
318 * failiure or (various) problems while talking
319 * to the server use cgi.c:error_response()
320 * instead of generating HTML/HTTP in chat() (yuck!)
321 * - Removed logentry from cancelled commit
323 * Revision 1.20 2001/06/09 10:55:28 jongfoster
324 * Changing BUFSIZ ==> BUFFER_SIZE
326 * Revision 1.19 2001/06/07 23:12:52 jongfoster
327 * Replacing function pointer in struct gateway with a directly
328 * called function forwarded_connect().
329 * Replacing struct gateway with struct forward_spec
331 * Revision 1.18 2001/06/03 19:12:16 oes
332 * introduced new cgi handling
334 * Revision 1.17 2001/06/01 20:07:23 jongfoster
335 * Now uses action +image-blocker{} rather than config->tinygif
337 * Revision 1.16 2001/06/01 18:49:17 jongfoster
338 * Replaced "list_share" with "list" - the tiny memory gain was not
339 * worth the extra complexity.
341 * Revision 1.15 2001/05/31 21:24:47 jongfoster
342 * Changed "permission" to "action" throughout.
343 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
344 * Moved vanilla wafer check into chat(), since we must now
345 * decide whether or not to add it based on the URL.
347 * Revision 1.14 2001/05/29 20:14:01 joergs
348 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
351 * Revision 1.13 2001/05/29 09:50:24 jongfoster
352 * Unified blocklist/imagelist/permissionslist.
353 * File format is still under discussion, but the internal changes
356 * Also modified interceptor behaviour:
357 * - We now intercept all URLs beginning with one of the following
358 * prefixes (and *only* these prefixes):
360 * * http://ijbswa.sf.net/config/
361 * * http://ijbswa.sourceforge.net/config/
362 * - New interceptors "home page" - go to http://i.j.b/ to see it.
363 * - Internal changes so that intercepted and fast redirect pages
364 * are not replaced with an image.
365 * - Interceptors now have the option to send a binary page direct
366 * to the client. (i.e. ijb-send-banner uses this)
367 * - Implemented show-url-info interceptor. (Which is why I needed
368 * the above interceptors changes - a typical URL is
369 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
370 * The previous mechanism would not have intercepted that, and
371 * if it had been intercepted then it then it would have replaced
374 * Revision 1.12 2001/05/27 22:17:04 oes
376 * - re_process_buffer no longer writes the modified buffer
377 * to the client, which was very ugly. It now returns the
378 * buffer, which it is then written by chat.
380 * - content_length now adjusts the Content-Length: header
381 * for modified documents rather than crunch()ing it.
382 * (Length info in csp->content_length, which is 0 for
383 * unmodified documents)
385 * - For this to work, sed() is called twice when filtering.
387 * Revision 1.11 2001/05/26 17:27:53 jongfoster
388 * Added support for CLF and fixed LOG_LEVEL_LOG.
389 * Also did CRLF->LF fix of my previous patch.
391 * Revision 1.10 2001/05/26 15:26:15 jongfoster
392 * ACL feature now provides more security by immediately dropping
393 * connections from untrusted hosts.
395 * Revision 1.9 2001/05/26 00:28:36 jongfoster
396 * Automatic reloading of config file.
397 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
398 * Most of the global variables have been moved to a new
399 * struct configuration_spec, accessed through csp->config->globalname
400 * Most of the globals remaining are used by the Win32 GUI.
402 * Revision 1.8 2001/05/25 22:43:18 jongfoster
403 * Fixing minor memory leak and buffer overflow.
405 * Revision 1.7 2001/05/25 22:34:30 jongfoster
408 * Revision 1.6 2001/05/23 00:13:58 joergs
409 * AmigaOS support fixed.
411 * Revision 1.5 2001/05/22 18:46:04 oes
413 * - Enabled filtering banners by size rather than URL
414 * by adding patterns that replace all standard banner
415 * sizes with the "Junkbuster" gif to the re_filterfile
417 * - Enabled filtering WebBugs by providing a pattern
418 * which kills all 1x1 images
420 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
421 * which is selected by the (nonstandard and therefore
422 * capital) letter 'U' in the option string.
423 * It causes the quantifiers to be ungreedy by default.
424 * Appending a ? turns back to greedy (!).
426 * - Added a new interceptor ijb-send-banner, which
427 * sends back the "Junkbuster" gif. Without imagelist or
428 * MSIE detection support, or if tinygif = 1, or the
429 * URL isn't recognized as an imageurl, a lame HTML
430 * explanation is sent instead.
432 * - Added new feature, which permits blocking remote
433 * script redirects and firing back a local redirect
435 * The feature is conditionally compiled, i.e. it
436 * can be disabled with --disable-fast-redirects,
437 * plus it must be activated by a "fast-redirects"
438 * line in the config file, has its own log level
439 * and of course wants to be displayed by show-proxy-args
440 * Note: Boy, all the #ifdefs in 1001 locations and
441 * all the fumbling with configure.in and acconfig.h
442 * were *way* more work than the feature itself :-(
444 * - Because a generic redirect template was needed for
445 * this, tinygif = 3 now uses the same.
447 * - Moved GIFs, and other static HTTP response templates
452 * - Removed some >400 CRs again (Jon, you really worked
455 * Revision 1.4 2001/05/21 19:34:01 jongfoster
456 * Made failure to bind() a fatal error.
458 * Revision 1.3 2001/05/20 01:21:20 jongfoster
459 * Version 2.9.4 checkin.
460 * - Merged popupfile and cookiefile, and added control over PCRS
461 * filtering, in new "permissionsfile".
462 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
463 * file error you now get a message box (in the Win32 GUI) rather
464 * than the program exiting with no explanation.
465 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
467 * - Removed tabs from "config"
468 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
469 * - Bumped up version number.
471 * Revision 1.2 2001/05/17 22:34:44 oes
472 * - Added hint on GIF char array generation to jcc.c
473 * - Cleaned CRLF's from the sources and related files
474 * - Repaired logging for REF and FRC
476 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
477 * Initial import of version 2.9.3 source tree
480 *********************************************************************/
486 #include <sys/types.h>
493 #ifdef FEATURE_PTHREAD
495 #endif /* def FEATURE_PTHREAD */
498 # ifndef FEATURE_PTHREAD
499 # include <windows.h>
500 # include <process.h>
501 # endif /* ndef FEATURE_PTHREAD */
504 # ifndef _WIN_CONSOLE
506 # endif /* ndef _WIN_CONSOLE */
508 #else /* ifndef _WIN32 */
510 # if !defined (__OS2__)
512 # include <sys/wait.h>
513 # endif /* ndef __OS2__ */
514 # include <sys/time.h>
515 # include <sys/stat.h>
516 # include <sys/ioctl.h>
519 #include <sys/termios.h>
530 # include <socket.h> /* BeOS has select() for sockets only. */
531 # include <OS.h> /* declarations for threads and stuff. */
534 # if defined(__EMX__) || defined(__OS2__)
535 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
540 #define bzero(B,N) memset(B,0x00,n)
555 #include "killpopup.h"
556 #include "miscutil.h"
558 #include "jbsockets.h"
563 #include "urlmatch.h"
565 const char jcc_h_rcs[] = JCC_H_VERSION;
566 const char project_h_rcs[] = PROJECT_H_VERSION;
569 struct client_state clients[1];
570 struct file_list files[1];
572 #ifdef FEATURE_STATISTICS
573 int urls_read = 0; /* total nr of urls read inc rejected */
574 int urls_rejected = 0; /* total nr of urls rejected */
575 #endif /* def FEATURE_STATISTICS */
578 static void listen_loop(void);
579 static void chat(struct client_state *csp);
581 void serve(struct client_state *csp);
582 #else /* ifndef AMIGA */
583 static void serve(struct client_state *csp);
584 #endif /* def AMIGA */
587 static int32 server_thread(void *data);
588 #endif /* def __BEOS__ */
591 #define sleep(N) Sleep(((N) * 1000))
595 #define sleep(N) DosSleep(((N) * 100))
598 #if defined(unix) || defined(__EMX__)
600 const char *pidfile = NULL;
601 int received_hup_signal = 0;
602 #endif /* defined unix */
604 /* The vanilla wafer. */
605 static const char VANILLA_WAFER[] =
606 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
607 "Do_not_send_me_any_copyrighted_information_other_than_the_"
608 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
609 "In_particular_do_not_send_me_any_cookies_that_"
610 "are_subject_to_a_claim_of_copyright_by_anybody._"
611 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
612 "(copyright_or_otherwise)_applying_to_any_cookie._";
615 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
616 /*********************************************************************
618 * Function : sig_handler
620 * Description : Signal handler for different signals.
621 * Exit gracefully on ABRT, TERM and INT
622 * or set a flag that will cause the errlog
623 * to be reopened by the main thread on HUP.
626 * 1 : the_signal = the signal cause this function to call
630 *********************************************************************/
631 static void sig_handler(int the_signal)
638 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
646 received_hup_signal = 1;
651 * We shouldn't be here, unless we catch signals
652 * in main() that we can't handle here!
654 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
662 /*********************************************************************
666 * Description : Once a connection to the client has been accepted,
667 * this function is called (via serve()) to handle the
668 * main business of the communication. When this
669 * function returns, the caller must close the client
673 * 1 : csp = Current client state (buffers, headers, etc...)
675 * Returns : On success, the number of bytes written are returned (zero
676 * indicates nothing was written). On error, -1 is returned,
677 * and errno is set appropriately. If count is zero and the
678 * file descriptor refers to a regular file, 0 will be
679 * returned without causing any other effect. For a special
680 * file, the results are not portable.
682 *********************************************************************/
683 static void chat(struct client_state *csp)
686 * This next lines are a little ugly, but they simplifies the if statements
687 * below. Basically if TOGGLE, then we want the if to test if the
688 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
689 * then we want the if to test for CSP_FLAG_FORCED , else we don't
691 #ifdef FEATURE_TOGGLE
692 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
693 #else /* ifndef FEATURE_TOGGLE */
694 # define IS_TOGGLED_ON_AND
695 #endif /* ndef FEATURE_TOGGLE */
696 #ifdef FEATURE_FORCE_LOAD
697 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
698 #else /* ifndef FEATURE_FORCE_LOAD */
699 # define IS_NOT_FORCED_AND
700 #endif /* def FEATURE_FORCE_LOAD */
702 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
704 char buf[BUFFER_SIZE];
712 int ms_iis5_hack = 0;
714 const struct forward_spec * fwd;
715 struct http_request *http;
716 int len; /* for buffer sizes */
717 #ifdef FEATURE_KILL_POPUPS
718 int block_popups; /* bool, 1==will block popups */
719 int block_popups_now = 0; /* bool, 1==currently blocking popups */
720 #endif /* def FEATURE_KILL_POPUPS */
722 int pcrs_filter; /* bool, 1==will filter through pcrs */
723 int gif_deanimate; /* bool, 1==will deanimate gifs */
725 /* Function that does the content filtering for the current request */
726 char *(*content_filter)() = NULL;
728 /* Skeleton for HTTP response, if we should intercept the request */
729 struct http_response *rsp;
734 * Read the client's request. Note that since we're not using select() we
735 * could get blocked here if a client connected, then didn't say anything!
740 len = read_socket(csp->cfd, buf, sizeof(buf));
742 if (len <= 0) break; /* error! */
744 add_to_iob(csp, buf, len);
746 req = get_header(csp);
750 break; /* no HTTP request! */
755 continue; /* more to come! */
758 #ifdef FEATURE_FORCE_LOAD
759 /* If this request contains the FORCE_PREFIX,
760 * better get rid of it now and set the force flag --oes
763 if (strstr(req, FORCE_PREFIX))
765 strclean(req, FORCE_PREFIX);
766 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
767 csp->flags |= CSP_FLAG_FORCED;
770 #endif /* def FEATURE_FORCE_LOAD */
772 parse_http_request(req, http, csp);
777 if (http->cmd == NULL)
779 strcpy(buf, CHEADER);
780 write_socket(csp->cfd, buf, strlen(buf));
782 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
787 /* decide how to route the HTTP request */
789 if ((fwd = forward_url(http, csp)) == NULL)
791 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
792 /* Never get here - LOG_LEVEL_FATAL causes program exit */
795 /* build the http request to send to the server
796 * we have to do one of the following:
798 * create = use the original HTTP request to create a new
799 * HTTP request that has either the path component
800 * without the http://domainspec (w/path) or the
801 * full orininal URL (w/url)
802 * Note that the path and/or the HTTP version may
803 * have been altered by now.
805 * connect = Open a socket to the host:port of the server
806 * and short-circuit server and client socket.
808 * pass = Pass the request unchanged if forwarding a CONNECT
809 * request to a parent proxy. Note that we'll be sending
810 * the CFAIL message ourselves if connecting to the parent
811 * fails, but we won't send a CSUCCEED message if it works,
812 * since that would result in a double message (ours and the
813 * parent's). After sending the request to the parent, we simply
819 * +--------+--------+
821 * 0 | create | connect|
823 * Forwarding +--------+--------+
825 * 1 | create | pass |
827 * +--------+--------+
832 * Determine the actions for this URL
834 #ifdef FEATURE_TOGGLE
835 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
837 /* Most compatible set of actions (i.e. none) */
838 init_current_action(csp->action);
841 #endif /* ndef FEATURE_TOGGLE */
843 url_actions(http, csp);
848 * Check if a CONNECT request is allowable:
849 * In the absence of a +limit-connect action, allow only port 443.
850 * If there is an action, allow whatever matches the specificaton.
854 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
855 || (csp->action->flags & ACTION_LIMIT_CONNECT
856 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
858 strcpy(buf, CFORBIDDEN);
859 write_socket(csp->cfd, buf, strlen(buf));
861 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
862 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
870 * Downgrade http version from 1.1 to 1.0 if +downgrade
873 if ( (http->ssl == 0)
874 && (!strcmpic(http->ver, "HTTP/1.1"))
875 && (csp->action->flags & ACTION_DOWNGRADE))
878 http->ver = strdup("HTTP/1.0");
880 if (http->ver == NULL)
882 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
887 * Save a copy of the original request for logging
889 http->ocmd = strdup(http->cmd);
891 if (http->ocmd == NULL)
893 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
897 * (Re)build the HTTP request for non-SSL requests.
898 * If forwarding, use the whole URL, else, use only the path.
904 http->cmd = strdup(http->gpc);
905 string_append(&http->cmd, " ");
907 if (fwd->forward_host)
909 string_append(&http->cmd, http->url);
913 string_append(&http->cmd, http->path);
916 string_append(&http->cmd, " ");
917 string_append(&http->cmd, http->ver);
919 if (http->cmd == NULL)
921 log_error(LOG_LEVEL_FATAL, "Out of memory rewiting SSL command");
924 enlist(csp->headers, http->cmd);
927 #ifdef FEATURE_COOKIE_JAR
929 * If we're logging cookies in a cookie jar, and the user has not
930 * supplied any wafers, and the user has not told us to suppress the
931 * vanilla wafer, then send the vanilla wafer.
933 if ((csp->config->jarfile != NULL)
934 && list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
935 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
937 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
939 #endif /* def FEATURE_COOKIE_JAR */
942 #ifdef FEATURE_KILL_POPUPS
943 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
944 #endif /* def FEATURE_KILL_POPUPS */
946 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
947 ((csp->action->flags & ACTION_FILTER) != 0);
949 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
951 /* grab the rest of the client's headers */
955 if ( ( p = get_header(csp) ) && ( *p == '\0' ) )
957 len = read_socket(csp->cfd, buf, sizeof(buf));
960 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
963 add_to_iob(csp, buf, len);
967 if (p == NULL) break;
969 enlist(csp->headers, p);
973 * We have a request. Now, check to see if we need to
974 * intercept it, i.e. If ..
978 /* a CGI call was detected and answered */
979 (NULL != (rsp = dispatch_cgi(csp)))
981 /* or we are enabled and... */
984 /* ..the request was blocked */
985 ( NULL != (rsp = block_url(csp)))
989 || ( NULL != (rsp = trust_url(csp)))
990 #endif /* def FEATURE_TRUST */
992 /* ..or a fast redirect kicked in */
993 #ifdef FEATURE_FAST_REDIRECTS
994 || (((csp->action->flags & ACTION_FAST_REDIRECTS) != 0) &&
995 (NULL != (rsp = redirect_url(csp))))
996 #endif /* def FEATURE_FAST_REDIRECTS */
1000 /* Write the answer to the client */
1001 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1002 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1004 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1007 #ifdef FEATURE_STATISTICS
1008 /* Count as a rejected request */
1009 csp->flags |= CSP_FLAG_REJECTED;
1010 #endif /* def FEATURE_STATISTICS */
1012 /* Log (FIXME: All intercept reasons apprear as "crunch" with Status 200) */
1013 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
1014 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
1016 /* Clean up and return */
1017 free_http_response(rsp);
1021 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1023 if (fwd->forward_host)
1025 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1026 fwd->forward_host, fwd->forward_port, http->hostport);
1030 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1033 /* here we connect to the server, gateway, or the forwarder */
1035 csp->sfd = forwarded_connect(fwd, http, csp);
1037 if (csp->sfd == JB_INVALID_SOCKET)
1039 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1042 if (errno == EINVAL)
1044 rsp = error_response(csp, "no-such-domain", errno);
1046 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
1047 csp->ip_addr_str, http->ocmd);
1051 rsp = error_response(csp, "connect-failed", errno);
1053 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1054 csp->ip_addr_str, http->ocmd);
1058 /* Write the answer to the client */
1061 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1062 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1064 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1068 free_http_response(rsp);
1072 log_error(LOG_LEVEL_CONNECT, "OK");
1074 hdr = sed(client_patterns, add_client_headers, csp);
1077 /* FIXME Should handle error properly */
1078 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1081 list_remove_all(csp->headers);
1083 if (fwd->forward_host || (http->ssl == 0))
1085 /* write the client's (modified) header to the server
1086 * (along with anything else that may be in the buffer)
1089 if (write_socket(csp->sfd, hdr, strlen(hdr))
1090 || (flush_socket(csp->sfd, csp) < 0))
1092 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1095 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1096 csp->ip_addr_str, http->ocmd);
1098 rsp = error_response(csp, "connect-failed", errno);
1102 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1103 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1105 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1109 free_http_response(rsp);
1117 * We're running an SSL tunnel and we're not forwarding,
1118 * so just send the "connect succeeded" message to the
1119 * client, flush the rest, and get out of the way.
1121 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1122 csp->ip_addr_str, http->ocmd);
1124 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
1132 /* we're finished with the client's header */
1135 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1137 /* pass data between the client and server
1138 * until one or the other shuts down the connection.
1147 * FD_ZERO here seems to point to an errant macro which crashes.
1148 * So do this by hand for now...
1150 memset(&rfds,0x00,sizeof(fd_set));
1154 FD_SET(csp->cfd, &rfds);
1155 FD_SET(csp->sfd, &rfds);
1157 n = select(maxfd+1, &rfds, NULL, NULL, NULL);
1161 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1165 /* this is the body of the browser's request
1166 * just read it and write it.
1169 if (FD_ISSET(csp->cfd, &rfds))
1171 len = read_socket(csp->cfd, buf, sizeof(buf));
1175 break; /* "game over, man" */
1178 if (write_socket(csp->sfd, buf, len))
1180 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1187 * The server wants to talk. It could be the header or the body.
1188 * If `hdr' is null, then it's the header otherwise it's the body.
1189 * FIXME: Does `hdr' really mean `host'? No.
1193 if (FD_ISSET(csp->sfd, &rfds))
1196 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1200 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1202 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1203 csp->ip_addr_str, http->ocmd);
1205 rsp = error_response(csp, "connect-failed", errno);
1209 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1210 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1212 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1216 free_http_response(rsp);
1220 /* Add a trailing zero. This lets filter_popups
1221 * use string operations.
1225 #ifdef FEATURE_KILL_POPUPS
1226 /* Filter the popups on this read. */
1227 if (block_popups_now)
1229 filter_popups(buf, csp);
1231 #endif /* def FEATURE_KILL_POPUPS */
1233 /* Normally, this would indicate that we've read
1234 * as much as the server has sent us and we can
1235 * close the client connection. However, Microsoft
1236 * in its wisdom has released IIS/5 with a bug that
1237 * prevents it from sending the trailing \r\n in
1238 * a 302 redirect header (and possibly other headers).
1239 * To work around this if we've haven't parsed
1240 * a full header we'll append a trailing \r\n
1241 * and see if this now generates a valid one.
1243 * This hack shouldn't have any impacts. If we've
1244 * already transmitted the header or if this is a
1245 * SSL connection, then we won't bother with this
1246 * hack. So we only work on partially received
1247 * headers. If we append a \r\n and this still
1248 * doesn't generate a valid header, then we won't
1249 * transmit anything to the client.
1254 if (server_body || http->ssl)
1257 * If we have been buffering up the document,
1258 * now is the time to apply content modification
1259 * and send the result to the client.
1264 * If the content filter fails, use the original
1265 * buffer and length.
1266 * (see p != NULL ? p : csp->iob->cur below)
1268 if (NULL == (p = (*content_filter)(csp)))
1270 csp->content_length = csp->iob->eod - csp->iob->cur;
1273 hdr = sed(server_patterns, add_server_headers, csp);
1276 /* FIXME Should handle error properly */
1277 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1280 if (write_socket(csp->cfd, hdr, strlen(hdr))
1281 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
1283 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1293 break; /* "game over, man" */
1297 * This is NOT the body, so
1298 * Let's pretend the server just sent us a blank line.
1300 len = sprintf(buf, "\r\n");
1303 * Now, let the normal header parsing algorithm below do its
1304 * job. If it fails, we'll exit instead of continuing.
1311 * If this is an SSL connection or we're in the body
1312 * of the server document, just write it to the client,
1313 * unless we need to buffer the body for later content-filtering
1316 if (server_body || http->ssl)
1320 add_to_iob(csp, buf, len);
1323 * If the buffer limit will be reached on the next read,
1324 * switch to non-filtering mode, i.e. make & write the
1325 * header, flush the socket and get out of the way.
1327 if (((size_t)(csp->iob->eod - csp->iob->buf)) + (size_t)BUFFER_SIZE > csp->config->buffer_limit)
1329 log_error(LOG_LEVEL_ERROR, "Buffer size limit reached! Flushing and stepping back.");
1331 hdr = sed(server_patterns, add_server_headers, csp);
1334 /* FIXME Should handle error properly */
1335 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1341 if (write_socket(csp->cfd, hdr, len)
1342 || (len = flush_socket(csp->cfd, csp) < 0))
1344 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1353 content_filter = NULL;
1360 if (write_socket(csp->cfd, buf, len))
1362 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
1371 /* we're still looking for the end of the
1372 * server's header ... (does that make header
1373 * parsing an "out of body experience" ?
1376 /* buffer up the data we just read */
1377 add_to_iob(csp, buf, len);
1379 /* get header lines from the iob */
1381 while ((p = get_header(csp)))
1385 /* see following note */
1388 enlist(csp->headers, p);
1392 /* NOTE: there are no "empty" headers so
1393 * if the pointer `p' is not NULL we must
1394 * assume that we reached the end of the
1395 * buffer before we hit the end of the header.
1402 /* Well, we tried our MS IIS/5
1403 * hack and it didn't work.
1404 * The header is incomplete
1405 * and there isn't anything
1406 * we can do about it.
1412 /* Since we have to wait for
1413 * more from the server before
1414 * we can parse the headers
1415 * we just continue here.
1421 /* we have now received the entire header.
1422 * filter it and send the result to the client
1425 hdr = sed(server_patterns, add_server_headers, csp);
1428 /* FIXME Should handle error properly */
1429 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1432 #ifdef FEATURE_KILL_POPUPS
1433 /* Start blocking popups if appropriate. */
1435 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1436 !http->ssl && /* We talk plaintext */
1437 block_popups) /* Policy allows */
1439 block_popups_now = 1;
1441 * Filter the part of the body that came in the same read
1442 * as the last headers:
1444 filter_popups(csp->iob->cur, csp);
1447 #endif /* def FEATURE_KILL_POPUPS */
1449 /* Buffer and pcrs filter this if appropriate. */
1451 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1452 !http->ssl && /* We talk plaintext */
1453 pcrs_filter) /* Policy allows */
1455 content_filter = pcrs_filter_response;
1458 /* Buffer and gif_deanimate this if appropriate. */
1460 if ((csp->content_type & CT_GIF) && /* It's a image/gif MIME-Type */
1461 !http->ssl && /* We talk plaintext */
1462 gif_deanimate) /* Policy allows */
1464 content_filter = gif_deanimate_response;
1468 * Only write if we're not buffering for content modification
1470 if (!content_filter)
1472 /* write the server's (modified) header to
1473 * the client (along with anything else that
1474 * may be in the buffer)
1479 if (write_socket(csp->cfd, hdr, len)
1480 || (len = flush_socket(csp->cfd, csp) < 0))
1482 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1484 /* the write failed, so don't bother
1485 * mentioning it to the client...
1486 * it probably can't hear us anyway.
1495 /* we're finished with the server's header */
1500 /* If this was a MS IIS/5 hack then it means
1501 * the server has already closed the
1502 * connection. Nothing more to read. Time
1513 return; /* huh? we should never get here */
1516 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
1517 csp->ip_addr_str, http->ocmd, byte_count);
1521 /*********************************************************************
1525 * Description : This is little more than chat. We only "serve" to
1526 * to close any socket that chat may have opened.
1529 * 1 : csp = Current client state (buffers, headers, etc...)
1533 *********************************************************************/
1535 void serve(struct client_state *csp)
1536 #else /* ifndef AMIGA */
1537 static void serve(struct client_state *csp)
1538 #endif /* def AMIGA */
1541 close_socket(csp->cfd);
1543 if (csp->sfd != JB_INVALID_SOCKET)
1545 close_socket(csp->sfd);
1548 csp->flags &= ~CSP_FLAG_ACTIVE;
1554 /*********************************************************************
1556 * Function : server_thread
1558 * Description : We only exist to call `serve' in a threaded environment.
1561 * 1 : data = Current client state (buffers, headers, etc...)
1563 * Returns : Always 0.
1565 *********************************************************************/
1566 static int32 server_thread(void *data)
1568 serve((struct client_state *) data);
1575 /*********************************************************************
1579 * Description : Print usage info & exit.
1581 * Parameters : Pointer to argv[0] for identifying ourselves
1585 *********************************************************************/
1586 void usage(const char *myname)
1588 printf("JunkBuster proxy version " VERSION " (" HOME_PAGE_URL ")\n"
1589 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
1590 "Aborting.\n", myname);
1597 /*********************************************************************
1601 * Description : Load the config file and start the listen loop.
1602 * This function is a lot more *sane* with the `load_config'
1603 * and `listen_loop' functions; although it stills does
1604 * a *little* too much for my taste.
1607 * 1 : argc = Number of parameters (including $0).
1608 * 2 : argv = Array of (char *)'s to the parameters.
1610 * Returns : 1 if : can't open config file, unrecognized directive,
1611 * stats requested in multi-thread mode, can't open the
1612 * log file, can't open the jar file, listen port is invalid,
1613 * any load fails, and can't bind port.
1615 * Else main never returns, the process must be signaled
1616 * to terminate execution. Or, on Windows, use the
1617 * "File", "Exit" menu option.
1619 *********************************************************************/
1621 int real_main(int argc, const char *argv[])
1623 int main(int argc, const char *argv[])
1628 struct passwd *pw = NULL;
1629 struct group *grp = NULL;
1637 #if !defined(_WIN32)
1645 * Parse the command line arguments
1647 while (++argc_pos < argc)
1649 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1651 if (strcmp(argv[argc_pos], "--help") == 0)
1656 else if(strcmp(argv[argc_pos], "--version") == 0)
1658 printf("Junkbuster version " VERSION " (" HOME_PAGE_URL ")\n");
1662 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
1667 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
1669 if (++argc_pos == argc) usage(argv[0]);
1670 pidfile = strdup(argv[argc_pos]);
1673 else if (strcmp(argv[argc_pos], "--user" ) == 0)
1675 if (++argc_pos == argc) usage(argv[argc_pos]);
1677 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
1680 if (NULL == (grp = getgrnam(p)))
1682 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
1686 if (NULL == (pw = getpwnam(argv[argc_pos])))
1688 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
1691 if (p != NULL) *--p = '\0';
1693 #endif /* defined(unix) */
1695 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
1697 configfile = argv[argc_pos];
1700 } /* -END- while (more arguments) */
1703 if ( *configfile != '/' )
1707 /* make config-filename absolute here */
1708 if ( !(basedir = getcwd( NULL, 1024 )))
1710 perror("get working dir failed");
1714 if ( !(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 )))
1716 perror("malloc failed");
1719 strcpy( abs_file, basedir );
1720 strcat( abs_file, "/" );
1721 strcat( abs_file, configfile );
1722 configfile = abs_file;
1724 #endif /* defined unix */
1731 #elif defined(_WIN32)
1736 * Unix signal handling
1738 * Catch the abort, interrupt and terminate signals for a graceful exit
1739 * Catch the hangup signal so the errlog can be reopened.
1740 * Ignore the broken pipe and child signals
1741 * FIXME: Isn't ignoring the default for SIGCHLD anyway and why ignore SIGPIPE?
1743 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1746 const int catched_signals[] = { SIGABRT, SIGTERM, SIGINT, SIGHUP, 0 };
1747 const int ignored_signals[] = { SIGPIPE, SIGCHLD, 0 };
1749 for (idx = 0; catched_signals[idx] != 0; idx++)
1751 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
1753 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
1757 for (idx = 0; ignored_signals[idx] != 0; idx++)
1759 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
1761 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
1766 #else /* ifdef _WIN32 */
1767 # ifdef _WIN_CONSOLE
1769 * We *are* in a windows console app.
1770 * Print a verbose messages about FAQ's and such
1772 printf(win32_blurb);
1773 # endif /* def _WIN_CONSOLE */
1774 #endif /* def _WIN32 */
1777 /* Initialize the CGI subsystem */
1778 cgi_init_error_messages();
1781 * If runnig on unix and without the --nodaemon
1782 * option, become a daemon. I.e. fork, detach
1783 * from tty and get process group leadership
1796 if ( pid < 0 ) /* error */
1801 else if ( pid != 0 ) /* parent */
1806 * must check for errors
1807 * child died due to missing files aso
1810 wpid = waitpid( pid, &status, WNOHANG );
1819 /* Should be more portable, but not as well tested */
1824 #else /* ndef __FreeBSD__ */
1826 #endif /* ndef __FreeBSD__ */
1827 fd = open("/dev/tty", O_RDONLY);
1830 /* no error check here */
1831 ioctl( fd, TIOCNOTTY,0 );
1835 /* FIXME: should close stderr (fd 2) here too, but the test
1837 * and load config file is done in listen_loop() and puts
1838 * some messages on stderr there.
1845 } /* -END- if (!no_daemon) */
1848 * As soon as we have written the PID file, we can switch
1849 * to the user and group ID indicated by the --user option
1855 if (((NULL != grp) && setgid(grp->gr_gid)) || (setgid(pw->pw_gid)))
1857 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
1859 if (setuid(pw->pw_uid))
1861 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
1865 #endif /* defined unix */
1875 /*********************************************************************
1877 * Function : bind_port_helper
1879 * Description : Bind the listen port. Handles logging, and aborts
1883 * 1 : config = Junkbuster configuration. Specifies port
1886 * Returns : Port that was opened.
1888 *********************************************************************/
1889 static jb_socket bind_port_helper(struct configuration_spec * config)
1894 if ( (config->haddr != NULL)
1895 && (config->haddr[0] == '1')
1896 && (config->haddr[1] == '2')
1897 && (config->haddr[2] == '7')
1898 && (config->haddr[3] == '.') )
1900 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
1903 else if (config->haddr == NULL)
1905 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
1910 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
1911 config->hport, config->haddr);
1914 result = bind_port(config->haddr, config->hport, &bfd);
1921 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
1922 "There may be another junkbuster or some other "
1923 "proxy running on port %d",
1924 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
1925 config->hport, config->hport);
1928 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
1929 "The hostname is not resolvable",
1930 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
1933 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
1934 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
1937 /* shouldn't get here */
1938 return JB_INVALID_SOCKET;
1941 config->need_bind = 0;
1947 /*********************************************************************
1949 * Function : listen_loop
1951 * Description : bind the listen port and enter a "FOREVER" listening loop.
1957 *********************************************************************/
1958 static void listen_loop(void)
1960 struct client_state *csp = NULL;
1962 struct configuration_spec * config;
1964 config = load_config();
1966 bfd = bind_port_helper(config);
1970 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
1971 while (waitpid(-1, NULL, WNOHANG) > 0)
1973 /* zombie children */
1975 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
1978 * Free data that was used by died threads
1984 * Re-open the errlog after HUP signal
1986 if (received_hup_signal)
1988 init_error_log(Argv[0], config->logfile, config->debug);
1989 received_hup_signal = 0;
1993 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
1995 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
1999 csp->flags |= CSP_FLAG_ACTIVE;
2000 csp->sfd = JB_INVALID_SOCKET;
2002 csp->config = config = load_config();
2004 if ( config->need_bind )
2007 * Since we were listening to the "old port", we will not see
2008 * a "listen" param change until the next IJB request. So, at
2009 * least 1 more request must be made for us to find the new
2010 * setting. I am simply closing the old socket and binding the
2013 * Which-ever is correct, we will serve 1 more page via the
2014 * old settings. This should probably be a "show-proxy-args"
2015 * request. This should not be a so common of an operation
2016 * that this will hurt people's feelings.
2021 bfd = bind_port_helper(config);
2024 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
2026 if (!accept_connection(csp, bfd))
2028 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
2041 log_error(LOG_LEVEL_CONNECT, "OK");
2044 #ifdef FEATURE_TOGGLE
2047 csp->flags |= CSP_FLAG_TOGGLED_ON;
2049 #endif /* def FEATURE_TOGGLE */
2051 if (run_loader(csp))
2053 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
2054 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2058 if (block_acl(NULL,csp))
2060 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
2061 close_socket(csp->cfd);
2065 #endif /* def FEATURE_ACL */
2067 /* add it to the list of clients */
2068 csp->next = clients->next;
2069 clients->next = csp;
2071 if (config->multi_threaded)
2075 /* this is a switch () statment in the C preprocessor - ugh */
2076 #undef SELECTED_ONE_OPTION
2078 /* Use Pthreads in preference to native code */
2079 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
2080 #define SELECTED_ONE_OPTION
2082 pthread_t the_thread;
2083 pthread_attr_t attrs;
2085 pthread_attr_init(&attrs);
2086 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
2087 child_id = (pthread_create(&the_thread, &attrs,
2088 (void*)serve, csp) ? -1 : 0);
2089 pthread_attr_destroy(&attrs);
2093 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
2094 #define SELECTED_ONE_OPTION
2095 child_id = _beginthread(
2101 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
2102 #define SELECTED_ONE_OPTION
2103 child_id = _beginthread(
2110 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
2111 #define SELECTED_ONE_OPTION
2113 thread_id tid = spawn_thread
2114 (server_thread, "server", B_NORMAL_PRIORITY, csp);
2116 if ((tid >= 0) && (resume_thread(tid) == B_OK))
2118 child_id = (int) tid;
2127 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2128 #define SELECTED_ONE_OPTION
2129 csp->cfd = ReleaseSocket(csp->cfd, -1);
2130 if((child_id = (int)CreateNewProcTags(
2131 NP_Entry, (ULONG)server_thread,
2132 NP_Output, Output(),
2133 NP_CloseOutput, FALSE,
2134 NP_Name, (ULONG)"junkbuster child",
2135 NP_StackSize, 200*1024,
2139 ((struct Task *)child_id)->tc_UserData = csp;
2140 Signal((struct Task *)child_id, SIGF_SINGLE);
2145 #if !defined(SELECTED_ONE_OPTION)
2148 /* This block is only needed when using fork().
2149 * When using threads, the server thread was
2150 * created and run by the call to _beginthread().
2152 if (child_id == 0) /* child */
2158 else if (child_id > 0) /* parent */
2160 /* in a fork()'d environment, the parent's
2161 * copy of the client socket and the CSP
2165 #if !defined(_WIN32) && defined(__CYGWIN__)
2167 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
2168 close_socket(csp->cfd);
2169 csp->flags &= ~CSP_FLAG_ACTIVE;
2173 #undef SELECTED_ONE_OPTION
2174 /* end of cpp switch () */
2176 if (child_id < 0) /* failed */
2178 char buf[BUFFER_SIZE];
2180 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
2182 sprintf(buf , "JunkBuster: can't fork: errno = %d", errno);
2184 write_socket(csp->cfd, buf, strlen(buf));
2185 close_socket(csp->cfd);
2186 csp->flags &= ~CSP_FLAG_ACTIVE;