1 const char jcc_rcs[] = "$Id: jcc.c,v 1.80 2002/03/11 22:07:05 david__schmidt 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 1.80 2002/03/11 22:07:05 david__schmidt
37 * OS/2 port maintenance:
38 * - Fixed EMX build - it had decayed a little
39 * - Fixed inexplicable crash during FD_ZERO - must be due to a bad macro.
40 * substituted a memset for now.
42 * Revision 1.79 2002/03/09 20:03:52 jongfoster
43 * - Making various functions return int rather than size_t.
44 * (Undoing a recent change). Since size_t is unsigned on
45 * Windows, functions like read_socket that return -1 on
46 * error cannot return a size_t.
48 * THIS WAS A MAJOR BUG - it caused frequent, unpredictable
49 * crashes, and also frequently caused JB to jump to 100%
50 * CPU and stay there. (Because it thought it had just
51 * read ((unsigned)-1) == 4Gb of data...)
53 * - The signature of write_socket has changed, it now simply
54 * returns success=0/failure=nonzero.
56 * - Trying to get rid of a few warnings --with-debug on
57 * Windows, I've introduced a new type "jb_socket". This is
58 * used for the socket file descriptors. On Windows, this
59 * is SOCKET (a typedef for unsigned). Everywhere else, it's
60 * an int. The error value can't be -1 any more, so it's
61 * now JB_INVALID_SOCKET (which is -1 on UNIX, and in
62 * Windows it maps to the #define INVALID_SOCKET.)
64 * - The signature of bind_port has changed.
66 * Revision 1.78 2002/03/08 21:35:04 oes
67 * Added optional group supplement to --user option. Will now use default group of user if no group given
69 * Revision 1.77 2002/03/07 03:52:06 oes
70 * - Fixed compiler warnings etc
71 * - Improved handling of failed DNS lookups
73 * Revision 1.76 2002/03/06 22:54:35 jongfoster
74 * Automated function-comment nitpicking.
76 * Revision 1.75 2002/03/06 10:02:19 oes
77 * Fixed stupid bug when --user was not given
79 * Revision 1.74 2002/03/06 00:49:31 jongfoster
80 * Fixing warning on Windows
81 * Making #ifdefs that refer to the same variable consistently
82 * use #ifdef unix rather than mixing #ifdef unix & #ifndef OS2
84 * Revision 1.73 2002/03/05 23:57:30 hal9
85 * Stray character 's' on line 1618 was breaking build.
87 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
88 * - Re-enable OS/2 building after new parms were added
89 * - Fix false out of memory report when resolving CGI templates when no IP
90 * address is available of failed attempt (a la no such domain)
92 * Revision 1.71 2002/03/05 18:13:56 oes
95 * Revision 1.70 2002/03/05 04:52:42 oes
96 * Deleted non-errlog debugging code
98 * Revision 1.69 2002/03/04 23:50:00 jongfoster
99 * Splitting off bind_port() call into bind_port_helper(), with
102 * Revision 1.68 2002/03/04 20:17:32 oes
105 * Revision 1.67 2002/03/04 18:18:57 oes
106 * - Removed _DEBUG mode
107 * - Cleand up cmdline parsing
108 * - Introduced --no-daemon, --pidfile options
109 * - Cleaned up signal handling:
110 * - Terminate cleanly on INT, TERM and ABRT
111 * - Schedule logfile for re-opening on HUP
112 * - Ignore CHLD and PIPE
113 * - Leave the rest with their default handlers
114 * - Uniform handler registration
115 * - Added usage() function
116 * - Played styleguide police
118 * Revision 1.66 2002/03/03 15:06:55 oes
119 * Re-enabled automatic config reloading
121 * Revision 1.65 2002/03/03 14:49:11 oes
122 * Fixed CLF logging: Now uses client's original HTTP request
124 * Revision 1.64 2002/03/03 09:18:03 joergs
125 * Made jumbjuster work on AmigaOS again.
127 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
128 * Clean up a little CRLF unpleasantness that suddenly appeared
130 * Revision 1.62 2002/02/20 23:17:23 jongfoster
131 * Detecting some out-of memory conditions and exiting with a log message.
133 * Revision 1.61 2002/01/17 21:01:52 jongfoster
134 * Moving all our URL and URL pattern parsing code to urlmatch.c.
136 * Revision 1.60 2001/12/30 14:07:32 steudten
137 * - Add signal handling (unix)
138 * - Add SIGHUP handler (unix)
139 * - Add creation of pidfile (unix)
140 * - Add action 'top' in rc file (RH)
141 * - Add entry 'SIGNALS' to manpage
142 * - Add exit message to logfile (unix)
144 * Revision 1.59 2001/12/13 14:07:18 oes
145 * Fixed Bug: 503 error page now sent OK
147 * Revision 1.58 2001/11/30 23:37:24 jongfoster
148 * Renaming the Win32 config file to config.txt - this is almost the
149 * same as the corresponding UNIX name "config"
151 * Revision 1.57 2001/11/16 00:47:43 jongfoster
152 * Changing the tty-disconnection code to use setsid().
154 * Revision 1.56 2001/11/13 20:20:54 jongfoster
155 * Tabs->spaces, fixing a bug with missing {} around an if()
157 * Revision 1.55 2001/11/13 20:14:53 jongfoster
158 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
160 * Revision 1.54 2001/11/07 00:03:14 steudten
161 * Give reliable return value if an error
162 * occurs not just 0 with new daemon mode.
164 * Revision 1.53 2001/11/05 21:41:43 steudten
165 * Add changes to be a real daemon just for unix os.
166 * (change cwd to /, detach from controlling tty, set
167 * process group and session leader to the own process.
169 * Add some fatal-error log message for failed malloc().
170 * Add '-d' if compiled with 'configure --with-debug' to
171 * enable debug output.
173 * Revision 1.52 2001/10/26 20:11:20 jongfoster
174 * Fixing type mismatch
176 * Revision 1.51 2001/10/26 17:38:28 oes
179 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
180 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
181 * threads to call select() simultaneously. So, it's time to do a real, live,
182 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
183 * (native). Both versions will work, but using __OS2__ offers multi-threading.
185 * Revision 1.49 2001/10/23 21:41:35 jongfoster
186 * Added call to initialize the (statically-allocated of course)
187 * "out of memory" CGI response.
189 * Revision 1.48 2001/10/10 19:56:46 jongfoster
190 * Moving some code that wasn't cookie-related out of an #ifdef
193 * Revision 1.47 2001/10/10 16:44:36 oes
194 * Added CONNECT destination port limitation check
196 * Revision 1.46 2001/10/08 15:17:41 oes
197 * Re-enabled SSL forwarding
199 * Revision 1.45 2001/10/07 15:42:11 oes
200 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
202 * Moved downgrading of the HTTP version from parse_http_request to
203 * chat(), since we can't decide if it is necessary before we have
204 * determined the actions for the URL. The HTTP command is now
205 * *always* re-built so the repairs need no longer be special-cased.
207 * filter_popups now gets a csp pointer so it can raise the new
208 * CSP_FLAG_MODIFIED flag.
212 * Added configurable size limit for the IOB. If the IOB grows so
213 * large that the next read would exceed the limit, the header
214 * is generated, and the header & unfiltered buffer are flushed
215 * to the client. Chat then continues in non-buffering,
216 * non-filtering body mode.
218 * Revision 1.44 2001/10/02 18:13:57 oes
221 * Revision 1.43 2001/10/02 15:32:13 oes
222 * Moved generation of hdr
224 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
225 * Cleaning up 2 compiler warnings on OS/2.
227 * Revision 1.41 2001/09/16 17:05:14 jongfoster
228 * Removing unused #include showarg.h
230 * Revision 1.40 2001/09/16 15:41:45 jongfoster
231 * Fixing signed/unsigned comparison warning.
233 * Revision 1.39 2001/09/16 13:21:27 jongfoster
234 * Changes to use new list functions.
236 * Revision 1.38 2001/09/16 13:01:46 jongfoster
237 * Removing redundant function call that zeroed zalloc()'d memory.
239 * Revision 1.37 2001/09/10 11:12:24 oes
240 * Deleted unused variable
242 * Revision 1.36 2001/09/10 10:56:15 oes
243 * Silenced compiler warnings
245 * Revision 1.35 2001/07/31 14:44:22 oes
246 * Deleted unused size parameter from filter_popups()
248 * Revision 1.34 2001/07/30 22:08:36 jongfoster
249 * Tidying up #defines:
250 * - All feature #defines are now of the form FEATURE_xxx
251 * - Permanently turned off WIN_GUI_EDIT
252 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
254 * Revision 1.33 2001/07/29 19:32:00 jongfoster
255 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
257 * Revision 1.32 2001/07/29 18:47:05 jongfoster
258 * Adding missing #include "loadcfg.h"
260 * Revision 1.31 2001/07/29 12:17:48 oes
261 * Applied pthread fix by Paul Lieverse
263 * Revision 1.30 2001/07/25 22:57:13 jongfoster
264 * __BEOS__ no longer overrides FEATURE_PTHREAD.
265 * This is because FEATURE_PTHREAD will soon be widely used, so I
266 * want to keep it simple.
268 * Revision 1.29 2001/07/24 12:47:06 oes
269 * Applied BeOS support update by Eugenia
271 * Revision 1.28 2001/07/23 13:26:12 oes
272 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
274 * Revision 1.27 2001/07/19 19:09:47 haroon
275 * - Added code to take care of the situation where while processing the first
276 * server response (which includes the server header), after finding the end
277 * of the headers we were not looking past the end of the headers for
278 * content modification. I enabled it for filter_popups.
279 * Someone else should look to see if other similar operations should be
280 * done to the discarded portion of the buffer.
282 * Note 2001/07/20: No, the other content modification mechanisms will process
283 * the whole iob later anyway. --oes
285 * Revision 1.26 2001/07/18 12:31:36 oes
288 * Revision 1.25 2001/07/15 19:43:49 jongfoster
289 * Supports POSIX threads.
290 * Also removed some unused #includes.
292 * Revision 1.24 2001/07/13 14:00:40 oes
293 * - Generic content modification scheme:
294 * Each feature has its own applicability flag that is set
295 * from csp->action->flags.
296 * Replaced the "filtering" int flag , by a function pointer
297 * "content_filter" to the function that will do the content
298 * modification. If it is != NULL, the document will be buffered
299 * and processed through *content_filter, which must set
300 * csp->content_length and return a modified copy of the body
301 * or return NULL (on failiure).
302 * - Changed csp->is_text to the more generic bitmap csp->content_type
303 * which can currently take the valued CT_TEXT or CT_GIF
305 * - Removed all #ifdef PCRS
307 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
308 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
309 * the `block_acl' call. This prevents a compilation error when the user
310 * does not wish to use the "ACL" feature.
312 * Revision 1.22 2001/06/29 21:45:41 oes
313 * Indentation, CRLF->LF, Tab-> Space
315 * Revision 1.21 2001/06/29 13:29:36 oes
316 * - Cleaned up, improved comments
317 * - Unified all possible interceptors (CGI,
318 * block, trust, fast_redirect) in one
319 * place, with one (CGI) answer generation
320 * mechansim. Much clearer now.
321 * - Removed the GIF image generation, which
322 * is now done in filters.c:block_url()
323 * - Made error conditions like domain lookup
324 * failiure or (various) problems while talking
325 * to the server use cgi.c:error_response()
326 * instead of generating HTML/HTTP in chat() (yuck!)
327 * - Removed logentry from cancelled commit
329 * Revision 1.20 2001/06/09 10:55:28 jongfoster
330 * Changing BUFSIZ ==> BUFFER_SIZE
332 * Revision 1.19 2001/06/07 23:12:52 jongfoster
333 * Replacing function pointer in struct gateway with a directly
334 * called function forwarded_connect().
335 * Replacing struct gateway with struct forward_spec
337 * Revision 1.18 2001/06/03 19:12:16 oes
338 * introduced new cgi handling
340 * Revision 1.17 2001/06/01 20:07:23 jongfoster
341 * Now uses action +image-blocker{} rather than config->tinygif
343 * Revision 1.16 2001/06/01 18:49:17 jongfoster
344 * Replaced "list_share" with "list" - the tiny memory gain was not
345 * worth the extra complexity.
347 * Revision 1.15 2001/05/31 21:24:47 jongfoster
348 * Changed "permission" to "action" throughout.
349 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
350 * Moved vanilla wafer check into chat(), since we must now
351 * decide whether or not to add it based on the URL.
353 * Revision 1.14 2001/05/29 20:14:01 joergs
354 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
357 * Revision 1.13 2001/05/29 09:50:24 jongfoster
358 * Unified blocklist/imagelist/permissionslist.
359 * File format is still under discussion, but the internal changes
362 * Also modified interceptor behaviour:
363 * - We now intercept all URLs beginning with one of the following
364 * prefixes (and *only* these prefixes):
366 * * http://ijbswa.sf.net/config/
367 * * http://ijbswa.sourceforge.net/config/
368 * - New interceptors "home page" - go to http://i.j.b/ to see it.
369 * - Internal changes so that intercepted and fast redirect pages
370 * are not replaced with an image.
371 * - Interceptors now have the option to send a binary page direct
372 * to the client. (i.e. ijb-send-banner uses this)
373 * - Implemented show-url-info interceptor. (Which is why I needed
374 * the above interceptors changes - a typical URL is
375 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
376 * The previous mechanism would not have intercepted that, and
377 * if it had been intercepted then it then it would have replaced
380 * Revision 1.12 2001/05/27 22:17:04 oes
382 * - re_process_buffer no longer writes the modified buffer
383 * to the client, which was very ugly. It now returns the
384 * buffer, which it is then written by chat.
386 * - content_length now adjusts the Content-Length: header
387 * for modified documents rather than crunch()ing it.
388 * (Length info in csp->content_length, which is 0 for
389 * unmodified documents)
391 * - For this to work, sed() is called twice when filtering.
393 * Revision 1.11 2001/05/26 17:27:53 jongfoster
394 * Added support for CLF and fixed LOG_LEVEL_LOG.
395 * Also did CRLF->LF fix of my previous patch.
397 * Revision 1.10 2001/05/26 15:26:15 jongfoster
398 * ACL feature now provides more security by immediately dropping
399 * connections from untrusted hosts.
401 * Revision 1.9 2001/05/26 00:28:36 jongfoster
402 * Automatic reloading of config file.
403 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
404 * Most of the global variables have been moved to a new
405 * struct configuration_spec, accessed through csp->config->globalname
406 * Most of the globals remaining are used by the Win32 GUI.
408 * Revision 1.8 2001/05/25 22:43:18 jongfoster
409 * Fixing minor memory leak and buffer overflow.
411 * Revision 1.7 2001/05/25 22:34:30 jongfoster
414 * Revision 1.6 2001/05/23 00:13:58 joergs
415 * AmigaOS support fixed.
417 * Revision 1.5 2001/05/22 18:46:04 oes
419 * - Enabled filtering banners by size rather than URL
420 * by adding patterns that replace all standard banner
421 * sizes with the "Junkbuster" gif to the re_filterfile
423 * - Enabled filtering WebBugs by providing a pattern
424 * which kills all 1x1 images
426 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
427 * which is selected by the (nonstandard and therefore
428 * capital) letter 'U' in the option string.
429 * It causes the quantifiers to be ungreedy by default.
430 * Appending a ? turns back to greedy (!).
432 * - Added a new interceptor ijb-send-banner, which
433 * sends back the "Junkbuster" gif. Without imagelist or
434 * MSIE detection support, or if tinygif = 1, or the
435 * URL isn't recognized as an imageurl, a lame HTML
436 * explanation is sent instead.
438 * - Added new feature, which permits blocking remote
439 * script redirects and firing back a local redirect
441 * The feature is conditionally compiled, i.e. it
442 * can be disabled with --disable-fast-redirects,
443 * plus it must be activated by a "fast-redirects"
444 * line in the config file, has its own log level
445 * and of course wants to be displayed by show-proxy-args
446 * Note: Boy, all the #ifdefs in 1001 locations and
447 * all the fumbling with configure.in and acconfig.h
448 * were *way* more work than the feature itself :-(
450 * - Because a generic redirect template was needed for
451 * this, tinygif = 3 now uses the same.
453 * - Moved GIFs, and other static HTTP response templates
458 * - Removed some >400 CRs again (Jon, you really worked
461 * Revision 1.4 2001/05/21 19:34:01 jongfoster
462 * Made failure to bind() a fatal error.
464 * Revision 1.3 2001/05/20 01:21:20 jongfoster
465 * Version 2.9.4 checkin.
466 * - Merged popupfile and cookiefile, and added control over PCRS
467 * filtering, in new "permissionsfile".
468 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
469 * file error you now get a message box (in the Win32 GUI) rather
470 * than the program exiting with no explanation.
471 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
473 * - Removed tabs from "config"
474 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
475 * - Bumped up version number.
477 * Revision 1.2 2001/05/17 22:34:44 oes
478 * - Added hint on GIF char array generation to jcc.c
479 * - Cleaned CRLF's from the sources and related files
480 * - Repaired logging for REF and FRC
482 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
483 * Initial import of version 2.9.3 source tree
486 *********************************************************************/
492 #include <sys/types.h>
499 #ifdef FEATURE_PTHREAD
501 #endif /* def FEATURE_PTHREAD */
504 # ifndef FEATURE_PTHREAD
505 # include <windows.h>
506 # include <process.h>
507 # endif /* ndef FEATURE_PTHREAD */
510 # ifndef _WIN_CONSOLE
512 # endif /* ndef _WIN_CONSOLE */
514 #else /* ifndef _WIN32 */
516 # if !defined (__OS2__)
518 # include <sys/wait.h>
519 # endif /* ndef __OS2__ */
520 # include <sys/time.h>
521 # include <sys/stat.h>
522 # include <sys/ioctl.h>
525 #include <sys/termios.h>
536 # include <socket.h> /* BeOS has select() for sockets only. */
537 # include <OS.h> /* declarations for threads and stuff. */
540 # if defined(__EMX__) || defined(__OS2__)
541 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
546 #define bzero(B,N) memset(B,0x00,n)
561 #include "killpopup.h"
562 #include "miscutil.h"
564 #include "jbsockets.h"
569 #include "urlmatch.h"
571 const char jcc_h_rcs[] = JCC_H_VERSION;
572 const char project_h_rcs[] = PROJECT_H_VERSION;
575 struct client_state clients[1];
576 struct file_list files[1];
578 #ifdef FEATURE_STATISTICS
579 int urls_read = 0; /* total nr of urls read inc rejected */
580 int urls_rejected = 0; /* total nr of urls rejected */
581 #endif /* def FEATURE_STATISTICS */
584 static void listen_loop(void);
585 static void chat(struct client_state *csp);
587 void serve(struct client_state *csp);
588 #else /* ifndef AMIGA */
589 static void serve(struct client_state *csp);
590 #endif /* def AMIGA */
593 static int32 server_thread(void *data);
594 #endif /* def __BEOS__ */
597 #define sleep(N) Sleep(((N) * 1000))
601 #define sleep(N) DosSleep(((N) * 100))
604 #if defined(unix) || defined(__EMX__)
606 const char *pidfile = NULL;
607 int received_hup_signal = 0;
608 #endif /* defined unix */
610 /* The vanilla wafer. */
611 static const char VANILLA_WAFER[] =
612 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
613 "Do_not_send_me_any_copyrighted_information_other_than_the_"
614 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
615 "In_particular_do_not_send_me_any_cookies_that_"
616 "are_subject_to_a_claim_of_copyright_by_anybody._"
617 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
618 "(copyright_or_otherwise)_applying_to_any_cookie._";
621 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
622 /*********************************************************************
624 * Function : sig_handler
626 * Description : Signal handler for different signals.
627 * Exit gracefully on ABRT, TERM and INT
628 * or set a flag that will cause the errlog
629 * to be reopened by the main thread on HUP.
632 * 1 : the_signal = the signal cause this function to call
636 *********************************************************************/
637 static void sig_handler(int the_signal)
644 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
652 received_hup_signal = 1;
657 * We shouldn't be here, unless we catch signals
658 * in main() that we can't handle here!
660 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
668 /*********************************************************************
672 * Description : Once a connection to the client has been accepted,
673 * this function is called (via serve()) to handle the
674 * main business of the communication. When this
675 * function returns, the caller must close the client
679 * 1 : csp = Current client state (buffers, headers, etc...)
681 * Returns : On success, the number of bytes written are returned (zero
682 * indicates nothing was written). On error, -1 is returned,
683 * and errno is set appropriately. If count is zero and the
684 * file descriptor refers to a regular file, 0 will be
685 * returned without causing any other effect. For a special
686 * file, the results are not portable.
688 *********************************************************************/
689 static void chat(struct client_state *csp)
692 * This next lines are a little ugly, but they simplifies the if statements
693 * below. Basically if TOGGLE, then we want the if to test if the
694 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
695 * then we want the if to test for CSP_FLAG_FORCED , else we don't
697 #ifdef FEATURE_TOGGLE
698 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
699 #else /* ifndef FEATURE_TOGGLE */
700 # define IS_TOGGLED_ON_AND
701 #endif /* ndef FEATURE_TOGGLE */
702 #ifdef FEATURE_FORCE_LOAD
703 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
704 #else /* ifndef FEATURE_FORCE_LOAD */
705 # define IS_NOT_FORCED_AND
706 #endif /* def FEATURE_FORCE_LOAD */
708 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
710 char buf[BUFFER_SIZE];
718 int ms_iis5_hack = 0;
720 const struct forward_spec * fwd;
721 struct http_request *http;
722 int len; /* for buffer sizes */
723 #ifdef FEATURE_KILL_POPUPS
724 int block_popups; /* bool, 1==will block popups */
725 int block_popups_now = 0; /* bool, 1==currently blocking popups */
726 #endif /* def FEATURE_KILL_POPUPS */
728 int pcrs_filter; /* bool, 1==will filter through pcrs */
729 int gif_deanimate; /* bool, 1==will deanimate gifs */
731 /* Function that does the content filtering for the current request */
732 char *(*content_filter)() = NULL;
734 /* Skeleton for HTTP response, if we should intercept the request */
735 struct http_response *rsp;
740 * Read the client's request. Note that since we're not using select() we
741 * could get blocked here if a client connected, then didn't say anything!
746 len = read_socket(csp->cfd, buf, sizeof(buf));
748 if (len <= 0) break; /* error! */
750 add_to_iob(csp, buf, len);
752 req = get_header(csp);
756 break; /* no HTTP request! */
761 continue; /* more to come! */
764 #ifdef FEATURE_FORCE_LOAD
765 /* If this request contains the FORCE_PREFIX,
766 * better get rid of it now and set the force flag --oes
769 if (strstr(req, FORCE_PREFIX))
771 strclean(req, FORCE_PREFIX);
772 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
773 csp->flags |= CSP_FLAG_FORCED;
776 #endif /* def FEATURE_FORCE_LOAD */
778 parse_http_request(req, http, csp);
783 if (http->cmd == NULL)
785 strcpy(buf, CHEADER);
786 write_socket(csp->cfd, buf, strlen(buf));
788 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
793 /* decide how to route the HTTP request */
795 if ((fwd = forward_url(http, csp)) == NULL)
797 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
798 /* Never get here - LOG_LEVEL_FATAL causes program exit */
801 /* build the http request to send to the server
802 * we have to do one of the following:
804 * create = use the original HTTP request to create a new
805 * HTTP request that has either the path component
806 * without the http://domainspec (w/path) or the
807 * full orininal URL (w/url)
808 * Note that the path and/or the HTTP version may
809 * have been altered by now.
811 * connect = Open a socket to the host:port of the server
812 * and short-circuit server and client socket.
814 * pass = Pass the request unchanged if forwarding a CONNECT
815 * request to a parent proxy. Note that we'll be sending
816 * the CFAIL message ourselves if connecting to the parent
817 * fails, but we won't send a CSUCCEED message if it works,
818 * since that would result in a double message (ours and the
819 * parent's). After sending the request to the parent, we simply
825 * +--------+--------+
827 * 0 | create | connect|
829 * Forwarding +--------+--------+
831 * 1 | create | pass |
833 * +--------+--------+
838 * Determine the actions for this URL
840 #ifdef FEATURE_TOGGLE
841 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
843 /* Most compatible set of actions (i.e. none) */
844 init_current_action(csp->action);
847 #endif /* ndef FEATURE_TOGGLE */
849 url_actions(http, csp);
854 * Check if a CONNECT request is allowable:
855 * In the absence of a +limit-connect action, allow only port 443.
856 * If there is an action, allow whatever matches the specificaton.
860 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
861 || (csp->action->flags & ACTION_LIMIT_CONNECT
862 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
864 strcpy(buf, CFORBIDDEN);
865 write_socket(csp->cfd, buf, strlen(buf));
867 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
868 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
876 * Downgrade http version from 1.1 to 1.0 if +downgrade
879 if ( (http->ssl == 0)
880 && (!strcmpic(http->ver, "HTTP/1.1"))
881 && (csp->action->flags & ACTION_DOWNGRADE))
884 http->ver = strdup("HTTP/1.0");
886 if (http->ver == NULL)
888 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
893 * Save a copy of the original request for logging
895 http->ocmd = strdup(http->cmd);
897 if (http->ocmd == NULL)
899 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
903 * (Re)build the HTTP request for non-SSL requests.
904 * If forwarding, use the whole URL, else, use only the path.
910 http->cmd = strdup(http->gpc);
911 string_append(&http->cmd, " ");
913 if (fwd->forward_host)
915 string_append(&http->cmd, http->url);
919 string_append(&http->cmd, http->path);
922 string_append(&http->cmd, " ");
923 string_append(&http->cmd, http->ver);
925 if (http->cmd == NULL)
927 log_error(LOG_LEVEL_FATAL, "Out of memory rewiting SSL command");
930 enlist(csp->headers, http->cmd);
933 #ifdef FEATURE_COOKIE_JAR
935 * If we're logging cookies in a cookie jar, and the user has not
936 * supplied any wafers, and the user has not told us to suppress the
937 * vanilla wafer, then send the vanilla wafer.
939 if ((csp->config->jarfile != NULL)
940 && list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
941 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
943 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
945 #endif /* def FEATURE_COOKIE_JAR */
948 #ifdef FEATURE_KILL_POPUPS
949 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
950 #endif /* def FEATURE_KILL_POPUPS */
952 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
953 (!list_is_empty(csp->action->multi[ACTION_MULTI_FILTER]));
955 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
957 /* grab the rest of the client's headers */
961 if ( ( p = get_header(csp) ) && ( *p == '\0' ) )
963 len = read_socket(csp->cfd, buf, sizeof(buf));
966 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
969 add_to_iob(csp, buf, len);
973 if (p == NULL) break;
975 enlist(csp->headers, p);
979 * We have a request. Now, check to see if we need to
980 * intercept it, i.e. If ..
984 /* a CGI call was detected and answered */
985 (NULL != (rsp = dispatch_cgi(csp)))
987 /* or we are enabled and... */
990 /* ..the request was blocked */
991 ( NULL != (rsp = block_url(csp)))
995 || ( NULL != (rsp = trust_url(csp)))
996 #endif /* def FEATURE_TRUST */
998 /* ..or a fast redirect kicked in */
999 #ifdef FEATURE_FAST_REDIRECTS
1000 || (((csp->action->flags & ACTION_FAST_REDIRECTS) != 0) &&
1001 (NULL != (rsp = redirect_url(csp))))
1002 #endif /* def FEATURE_FAST_REDIRECTS */
1006 /* Write the answer to the client */
1007 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1008 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1010 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1013 #ifdef FEATURE_STATISTICS
1014 /* Count as a rejected request */
1015 csp->flags |= CSP_FLAG_REJECTED;
1016 #endif /* def FEATURE_STATISTICS */
1018 /* Log (FIXME: All intercept reasons apprear as "crunch" with Status 200) */
1019 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
1020 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
1022 /* Clean up and return */
1023 free_http_response(rsp);
1027 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
1029 if (fwd->forward_host)
1031 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
1032 fwd->forward_host, fwd->forward_port, http->hostport);
1036 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
1039 /* here we connect to the server, gateway, or the forwarder */
1041 csp->sfd = forwarded_connect(fwd, http, csp);
1043 if (csp->sfd == JB_INVALID_SOCKET)
1045 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
1048 if (errno == EINVAL)
1050 rsp = error_response(csp, "no-such-domain", errno);
1052 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
1053 csp->ip_addr_str, http->ocmd);
1057 rsp = error_response(csp, "connect-failed", errno);
1059 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1060 csp->ip_addr_str, http->ocmd);
1064 /* Write the answer to the client */
1067 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1068 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1070 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1074 free_http_response(rsp);
1078 log_error(LOG_LEVEL_CONNECT, "OK");
1080 hdr = sed(client_patterns, add_client_headers, csp);
1083 /* FIXME Should handle error properly */
1084 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1087 list_remove_all(csp->headers);
1089 if (fwd->forward_host || (http->ssl == 0))
1091 /* write the client's (modified) header to the server
1092 * (along with anything else that may be in the buffer)
1095 if (write_socket(csp->sfd, hdr, strlen(hdr))
1096 || (flush_socket(csp->sfd, csp) < 0))
1098 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1101 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1102 csp->ip_addr_str, http->ocmd);
1104 rsp = error_response(csp, "connect-failed", errno);
1108 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1109 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1111 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1115 free_http_response(rsp);
1123 * We're running an SSL tunnel and we're not forwarding,
1124 * so just send the "connect succeeded" message to the
1125 * client, flush the rest, and get out of the way.
1127 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1128 csp->ip_addr_str, http->ocmd);
1130 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1))
1138 /* we're finished with the client's header */
1141 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1143 /* pass data between the client and server
1144 * until one or the other shuts down the connection.
1153 * FD_ZERO here seems to point to an errant macro which crashes.
1154 * So do this by hand for now...
1156 memset(&rfds,0x00,sizeof(fd_set));
1160 FD_SET(csp->cfd, &rfds);
1161 FD_SET(csp->sfd, &rfds);
1163 n = select(maxfd+1, &rfds, NULL, NULL, NULL);
1167 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1171 /* this is the body of the browser's request
1172 * just read it and write it.
1175 if (FD_ISSET(csp->cfd, &rfds))
1177 len = read_socket(csp->cfd, buf, sizeof(buf));
1181 break; /* "game over, man" */
1184 if (write_socket(csp->sfd, buf, len))
1186 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1193 * The server wants to talk. It could be the header or the body.
1194 * If `hdr' is null, then it's the header otherwise it's the body.
1195 * FIXME: Does `hdr' really mean `host'? No.
1199 if (FD_ISSET(csp->sfd, &rfds))
1202 len = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1206 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1208 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1209 csp->ip_addr_str, http->ocmd);
1211 rsp = error_response(csp, "connect-failed", errno);
1215 if (write_socket(csp->cfd, rsp->head, rsp->head_length)
1216 || write_socket(csp->cfd, rsp->body, rsp->content_length))
1218 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1222 free_http_response(rsp);
1226 /* Add a trailing zero. This lets filter_popups
1227 * use string operations.
1231 #ifdef FEATURE_KILL_POPUPS
1232 /* Filter the popups on this read. */
1233 if (block_popups_now)
1235 filter_popups(buf, csp);
1237 #endif /* def FEATURE_KILL_POPUPS */
1239 /* Normally, this would indicate that we've read
1240 * as much as the server has sent us and we can
1241 * close the client connection. However, Microsoft
1242 * in its wisdom has released IIS/5 with a bug that
1243 * prevents it from sending the trailing \r\n in
1244 * a 302 redirect header (and possibly other headers).
1245 * To work around this if we've haven't parsed
1246 * a full header we'll append a trailing \r\n
1247 * and see if this now generates a valid one.
1249 * This hack shouldn't have any impacts. If we've
1250 * already transmitted the header or if this is a
1251 * SSL connection, then we won't bother with this
1252 * hack. So we only work on partially received
1253 * headers. If we append a \r\n and this still
1254 * doesn't generate a valid header, then we won't
1255 * transmit anything to the client.
1260 if (server_body || http->ssl)
1263 * If we have been buffering up the document,
1264 * now is the time to apply content modification
1265 * and send the result to the client.
1270 * If the content filter fails, use the original
1271 * buffer and length.
1272 * (see p != NULL ? p : csp->iob->cur below)
1274 if (NULL == (p = (*content_filter)(csp)))
1276 csp->content_length = csp->iob->eod - csp->iob->cur;
1279 hdr = sed(server_patterns, add_server_headers, csp);
1282 /* FIXME Should handle error properly */
1283 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1286 if (write_socket(csp->cfd, hdr, strlen(hdr))
1287 || write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length))
1289 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1299 break; /* "game over, man" */
1303 * This is NOT the body, so
1304 * Let's pretend the server just sent us a blank line.
1306 len = sprintf(buf, "\r\n");
1309 * Now, let the normal header parsing algorithm below do its
1310 * job. If it fails, we'll exit instead of continuing.
1317 * If this is an SSL connection or we're in the body
1318 * of the server document, just write it to the client,
1319 * unless we need to buffer the body for later content-filtering
1322 if (server_body || http->ssl)
1326 add_to_iob(csp, buf, len);
1329 * If the buffer limit will be reached on the next read,
1330 * switch to non-filtering mode, i.e. make & write the
1331 * header, flush the socket and get out of the way.
1333 if (((size_t)(csp->iob->eod - csp->iob->buf)) + (size_t)BUFFER_SIZE > csp->config->buffer_limit)
1335 log_error(LOG_LEVEL_ERROR, "Buffer size limit reached! Flushing and stepping back.");
1337 hdr = sed(server_patterns, add_server_headers, csp);
1340 /* FIXME Should handle error properly */
1341 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1347 if (write_socket(csp->cfd, hdr, len)
1348 || (len = flush_socket(csp->cfd, csp) < 0))
1350 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1359 content_filter = NULL;
1366 if (write_socket(csp->cfd, buf, len))
1368 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
1377 /* we're still looking for the end of the
1378 * server's header ... (does that make header
1379 * parsing an "out of body experience" ?
1382 /* buffer up the data we just read */
1383 add_to_iob(csp, buf, len);
1385 /* get header lines from the iob */
1387 while ((p = get_header(csp)))
1391 /* see following note */
1394 enlist(csp->headers, p);
1398 /* NOTE: there are no "empty" headers so
1399 * if the pointer `p' is not NULL we must
1400 * assume that we reached the end of the
1401 * buffer before we hit the end of the header.
1408 /* Well, we tried our MS IIS/5
1409 * hack and it didn't work.
1410 * The header is incomplete
1411 * and there isn't anything
1412 * we can do about it.
1418 /* Since we have to wait for
1419 * more from the server before
1420 * we can parse the headers
1421 * we just continue here.
1427 /* we have now received the entire header.
1428 * filter it and send the result to the client
1431 hdr = sed(server_patterns, add_server_headers, csp);
1434 /* FIXME Should handle error properly */
1435 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1438 #ifdef FEATURE_KILL_POPUPS
1439 /* Start blocking popups if appropriate. */
1441 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1442 !http->ssl && /* We talk plaintext */
1443 block_popups) /* Policy allows */
1445 block_popups_now = 1;
1447 * Filter the part of the body that came in the same read
1448 * as the last headers:
1450 filter_popups(csp->iob->cur, csp);
1453 #endif /* def FEATURE_KILL_POPUPS */
1455 /* Buffer and pcrs filter this if appropriate. */
1457 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1458 !http->ssl && /* We talk plaintext */
1459 pcrs_filter) /* Policy allows */
1461 content_filter = pcrs_filter_response;
1464 /* Buffer and gif_deanimate this if appropriate. */
1466 if ((csp->content_type & CT_GIF) && /* It's a image/gif MIME-Type */
1467 !http->ssl && /* We talk plaintext */
1468 gif_deanimate) /* Policy allows */
1470 content_filter = gif_deanimate_response;
1474 * Only write if we're not buffering for content modification
1476 if (!content_filter)
1478 /* write the server's (modified) header to
1479 * the client (along with anything else that
1480 * may be in the buffer)
1485 if (write_socket(csp->cfd, hdr, len)
1486 || (len = flush_socket(csp->cfd, csp) < 0))
1488 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1490 /* the write failed, so don't bother
1491 * mentioning it to the client...
1492 * it probably can't hear us anyway.
1501 /* we're finished with the server's header */
1506 /* If this was a MS IIS/5 hack then it means
1507 * the server has already closed the
1508 * connection. Nothing more to read. Time
1519 return; /* huh? we should never get here */
1522 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
1523 csp->ip_addr_str, http->ocmd, byte_count);
1527 /*********************************************************************
1531 * Description : This is little more than chat. We only "serve" to
1532 * to close any socket that chat may have opened.
1535 * 1 : csp = Current client state (buffers, headers, etc...)
1539 *********************************************************************/
1541 void serve(struct client_state *csp)
1542 #else /* ifndef AMIGA */
1543 static void serve(struct client_state *csp)
1544 #endif /* def AMIGA */
1547 close_socket(csp->cfd);
1549 if (csp->sfd != JB_INVALID_SOCKET)
1551 close_socket(csp->sfd);
1554 csp->flags &= ~CSP_FLAG_ACTIVE;
1560 /*********************************************************************
1562 * Function : server_thread
1564 * Description : We only exist to call `serve' in a threaded environment.
1567 * 1 : data = Current client state (buffers, headers, etc...)
1569 * Returns : Always 0.
1571 *********************************************************************/
1572 static int32 server_thread(void *data)
1574 serve((struct client_state *) data);
1581 /*********************************************************************
1585 * Description : Print usage info & exit.
1587 * Parameters : Pointer to argv[0] for identifying ourselves
1591 *********************************************************************/
1592 void usage(const char *myname)
1594 printf("JunkBuster proxy version " VERSION " (" HOME_PAGE_URL ")\n"
1595 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user[.group]] [configfile]\n"
1596 "Aborting.\n", myname);
1603 /*********************************************************************
1607 * Description : Load the config file and start the listen loop.
1608 * This function is a lot more *sane* with the `load_config'
1609 * and `listen_loop' functions; although it stills does
1610 * a *little* too much for my taste.
1613 * 1 : argc = Number of parameters (including $0).
1614 * 2 : argv = Array of (char *)'s to the parameters.
1616 * Returns : 1 if : can't open config file, unrecognized directive,
1617 * stats requested in multi-thread mode, can't open the
1618 * log file, can't open the jar file, listen port is invalid,
1619 * any load fails, and can't bind port.
1621 * Else main never returns, the process must be signaled
1622 * to terminate execution. Or, on Windows, use the
1623 * "File", "Exit" menu option.
1625 *********************************************************************/
1627 int real_main(int argc, const char *argv[])
1629 int main(int argc, const char *argv[])
1634 struct passwd *pw = NULL;
1635 struct group *grp = NULL;
1643 #if !defined(_WIN32)
1651 * Parse the command line arguments
1653 while (++argc_pos < argc)
1655 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1657 if (strcmp(argv[argc_pos], "--help") == 0)
1662 else if(strcmp(argv[argc_pos], "--version") == 0)
1664 printf("Junkbuster version " VERSION " (" HOME_PAGE_URL ")\n");
1668 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
1673 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
1675 if (++argc_pos == argc) usage(argv[0]);
1676 pidfile = strdup(argv[argc_pos]);
1679 else if (strcmp(argv[argc_pos], "--user" ) == 0)
1681 if (++argc_pos == argc) usage(argv[argc_pos]);
1683 if ((NULL != (p = strchr(argv[argc_pos], '.'))) && *(p + 1) != '0')
1686 if (NULL == (grp = getgrnam(p)))
1688 log_error(LOG_LEVEL_FATAL, "Group %s not found.", p);
1692 if (NULL == (pw = getpwnam(argv[argc_pos])))
1694 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
1697 if (p != NULL) *--p = '\0';
1699 #endif /* defined(unix) */
1701 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
1703 configfile = argv[argc_pos];
1706 } /* -END- while (more arguments) */
1709 if ( *configfile != '/' )
1713 /* make config-filename absolute here */
1714 if ( !(basedir = getcwd( NULL, 1024 )))
1716 perror("get working dir failed");
1720 if ( !(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 )))
1722 perror("malloc failed");
1725 strcpy( abs_file, basedir );
1726 strcat( abs_file, "/" );
1727 strcat( abs_file, configfile );
1728 configfile = abs_file;
1730 #endif /* defined unix */
1737 #elif defined(_WIN32)
1742 * Unix signal handling
1744 * Catch the abort, interrupt and terminate signals for a graceful exit
1745 * Catch the hangup signal so the errlog can be reopened.
1746 * Ignore the broken pipe and child signals
1747 * FIXME: Isn't ignoring the default for SIGCHLD anyway and why ignore SIGPIPE?
1749 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1752 const int catched_signals[] = { SIGABRT, SIGTERM, SIGINT, SIGHUP, 0 };
1753 const int ignored_signals[] = { SIGPIPE, SIGCHLD, 0 };
1755 for (idx = 0; catched_signals[idx] != 0; idx++)
1757 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
1759 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
1763 for (idx = 0; ignored_signals[idx] != 0; idx++)
1765 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
1767 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
1772 #else /* ifdef _WIN32 */
1773 # ifdef _WIN_CONSOLE
1775 * We *are* in a windows console app.
1776 * Print a verbose messages about FAQ's and such
1778 printf(win32_blurb);
1779 # endif /* def _WIN_CONSOLE */
1780 #endif /* def _WIN32 */
1783 /* Initialize the CGI subsystem */
1784 cgi_init_error_messages();
1787 * If runnig on unix and without the --nodaemon
1788 * option, become a daemon. I.e. fork, detach
1789 * from tty and get process group leadership
1802 if ( pid < 0 ) /* error */
1807 else if ( pid != 0 ) /* parent */
1812 * must check for errors
1813 * child died due to missing files aso
1816 wpid = waitpid( pid, &status, WNOHANG );
1825 /* Should be more portable, but not as well tested */
1830 #else /* ndef __FreeBSD__ */
1832 #endif /* ndef __FreeBSD__ */
1833 fd = open("/dev/tty", O_RDONLY);
1836 /* no error check here */
1837 ioctl( fd, TIOCNOTTY,0 );
1841 /* FIXME: should close stderr (fd 2) here too, but the test
1843 * and load config file is done in listen_loop() and puts
1844 * some messages on stderr there.
1851 } /* -END- if (!no_daemon) */
1854 * As soon as we have written the PID file, we can switch
1855 * to the user and group ID indicated by the --user option
1861 if (((NULL != grp) && setgid(grp->gr_gid)) || (setgid(pw->pw_gid)))
1863 log_error(LOG_LEVEL_FATAL, "Cannot setgid(): Insufficient permissions.");
1865 if (setuid(pw->pw_uid))
1867 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
1871 #endif /* defined unix */
1881 /*********************************************************************
1883 * Function : bind_port_helper
1885 * Description : Bind the listen port. Handles logging, and aborts
1889 * 1 : config = Junkbuster configuration. Specifies port
1892 * Returns : Port that was opened.
1894 *********************************************************************/
1895 static jb_socket bind_port_helper(struct configuration_spec * config)
1900 if ( (config->haddr != NULL)
1901 && (config->haddr[0] == '1')
1902 && (config->haddr[1] == '2')
1903 && (config->haddr[2] == '7')
1904 && (config->haddr[3] == '.') )
1906 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
1909 else if (config->haddr == NULL)
1911 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
1916 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
1917 config->hport, config->haddr);
1920 result = bind_port(config->haddr, config->hport, &bfd);
1927 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
1928 "There may be another junkbuster or some other "
1929 "proxy running on port %d",
1930 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
1931 config->hport, config->hport);
1934 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: "
1935 "The hostname is not resolvable",
1936 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
1939 log_error(LOG_LEVEL_FATAL, "can't bind to %s:%d: because %E",
1940 (NULL != config->haddr) ? config->haddr : "INADDR_ANY", config->hport);
1943 /* shouldn't get here */
1944 return JB_INVALID_SOCKET;
1947 config->need_bind = 0;
1953 /*********************************************************************
1955 * Function : listen_loop
1957 * Description : bind the listen port and enter a "FOREVER" listening loop.
1963 *********************************************************************/
1964 static void listen_loop(void)
1966 struct client_state *csp = NULL;
1968 struct configuration_spec * config;
1970 config = load_config();
1972 bfd = bind_port_helper(config);
1976 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
1977 while (waitpid(-1, NULL, WNOHANG) > 0)
1979 /* zombie children */
1981 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
1984 * Free data that was used by died threads
1990 * Re-open the errlog after HUP signal
1992 if (received_hup_signal)
1994 init_error_log(Argv[0], config->logfile, config->debug);
1995 received_hup_signal = 0;
1999 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
2001 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
2005 csp->flags |= CSP_FLAG_ACTIVE;
2006 csp->sfd = JB_INVALID_SOCKET;
2008 csp->config = config = load_config();
2010 if ( config->need_bind )
2013 * Since we were listening to the "old port", we will not see
2014 * a "listen" param change until the next IJB request. So, at
2015 * least 1 more request must be made for us to find the new
2016 * setting. I am simply closing the old socket and binding the
2019 * Which-ever is correct, we will serve 1 more page via the
2020 * old settings. This should probably be a "show-proxy-args"
2021 * request. This should not be a so common of an operation
2022 * that this will hurt people's feelings.
2027 bfd = bind_port_helper(config);
2030 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
2032 if (!accept_connection(csp, bfd))
2034 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
2047 log_error(LOG_LEVEL_CONNECT, "OK");
2050 #ifdef FEATURE_TOGGLE
2053 csp->flags |= CSP_FLAG_TOGGLED_ON;
2055 #endif /* def FEATURE_TOGGLE */
2057 if (run_loader(csp))
2059 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
2060 /* Never get here - LOG_LEVEL_FATAL causes program exit */
2064 if (block_acl(NULL,csp))
2066 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
2067 close_socket(csp->cfd);
2071 #endif /* def FEATURE_ACL */
2073 /* add it to the list of clients */
2074 csp->next = clients->next;
2075 clients->next = csp;
2077 if (config->multi_threaded)
2081 /* this is a switch () statment in the C preprocessor - ugh */
2082 #undef SELECTED_ONE_OPTION
2084 /* Use Pthreads in preference to native code */
2085 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
2086 #define SELECTED_ONE_OPTION
2088 pthread_t the_thread;
2089 pthread_attr_t attrs;
2091 pthread_attr_init(&attrs);
2092 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
2093 child_id = (pthread_create(&the_thread, &attrs,
2094 (void*)serve, csp) ? -1 : 0);
2095 pthread_attr_destroy(&attrs);
2099 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
2100 #define SELECTED_ONE_OPTION
2101 child_id = _beginthread(
2107 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
2108 #define SELECTED_ONE_OPTION
2109 child_id = _beginthread(
2116 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
2117 #define SELECTED_ONE_OPTION
2119 thread_id tid = spawn_thread
2120 (server_thread, "server", B_NORMAL_PRIORITY, csp);
2122 if ((tid >= 0) && (resume_thread(tid) == B_OK))
2124 child_id = (int) tid;
2133 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2134 #define SELECTED_ONE_OPTION
2135 csp->cfd = ReleaseSocket(csp->cfd, -1);
2136 if((child_id = (int)CreateNewProcTags(
2137 NP_Entry, (ULONG)server_thread,
2138 NP_Output, Output(),
2139 NP_CloseOutput, FALSE,
2140 NP_Name, (ULONG)"junkbuster child",
2141 NP_StackSize, 200*1024,
2145 ((struct Task *)child_id)->tc_UserData = csp;
2146 Signal((struct Task *)child_id, SIGF_SINGLE);
2151 #if !defined(SELECTED_ONE_OPTION)
2154 /* This block is only needed when using fork().
2155 * When using threads, the server thread was
2156 * created and run by the call to _beginthread().
2158 if (child_id == 0) /* child */
2164 else if (child_id > 0) /* parent */
2166 /* in a fork()'d environment, the parent's
2167 * copy of the client socket and the CSP
2171 #if !defined(_WIN32) && defined(__CYGWIN__)
2173 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
2174 close_socket(csp->cfd);
2175 csp->flags &= ~CSP_FLAG_ACTIVE;
2179 #undef SELECTED_ONE_OPTION
2180 /* end of cpp switch () */
2182 if (child_id < 0) /* failed */
2184 char buf[BUFFER_SIZE];
2186 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
2188 sprintf(buf , "JunkBuster: can't fork: errno = %d", errno);
2190 write_socket(csp->cfd, buf, strlen(buf));
2191 close_socket(csp->cfd);
2192 csp->flags &= ~CSP_FLAG_ACTIVE;