1 const char jcc_rcs[] = "$Id: jcc.c,v 1.69 2002/03/04 23:50:00 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 1.69 2002/03/04 23:50:00 jongfoster
37 * Splitting off bind_port() call into bind_port_helper(), with
40 * Revision 1.68 2002/03/04 20:17:32 oes
43 * Revision 1.67 2002/03/04 18:18:57 oes
44 * - Removed _DEBUG mode
45 * - Cleand up cmdline parsing
46 * - Introduced --no-daemon, --pidfile options
47 * - Cleaned up signal handling:
48 * - Terminate cleanly on INT, TERM and ABRT
49 * - Schedule logfile for re-opening on HUP
50 * - Ignore CHLD and PIPE
51 * - Leave the rest with their default handlers
52 * - Uniform handler registration
53 * - Added usage() function
54 * - Played styleguide police
56 * Revision 1.66 2002/03/03 15:06:55 oes
57 * Re-enabled automatic config reloading
59 * Revision 1.65 2002/03/03 14:49:11 oes
60 * Fixed CLF logging: Now uses client's original HTTP request
62 * Revision 1.64 2002/03/03 09:18:03 joergs
63 * Made jumbjuster work on AmigaOS again.
65 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
66 * Clean up a little CRLF unpleasantness that suddenly appeared
68 * Revision 1.62 2002/02/20 23:17:23 jongfoster
69 * Detecting some out-of memory conditions and exiting with a log message.
71 * Revision 1.61 2002/01/17 21:01:52 jongfoster
72 * Moving all our URL and URL pattern parsing code to urlmatch.c.
74 * Revision 1.60 2001/12/30 14:07:32 steudten
75 * - Add signal handling (unix)
76 * - Add SIGHUP handler (unix)
77 * - Add creation of pidfile (unix)
78 * - Add action 'top' in rc file (RH)
79 * - Add entry 'SIGNALS' to manpage
80 * - Add exit message to logfile (unix)
82 * Revision 1.59 2001/12/13 14:07:18 oes
83 * Fixed Bug: 503 error page now sent OK
85 * Revision 1.58 2001/11/30 23:37:24 jongfoster
86 * Renaming the Win32 config file to config.txt - this is almost the
87 * same as the corresponding UNIX name "config"
89 * Revision 1.57 2001/11/16 00:47:43 jongfoster
90 * Changing the tty-disconnection code to use setsid().
92 * Revision 1.56 2001/11/13 20:20:54 jongfoster
93 * Tabs->spaces, fixing a bug with missing {} around an if()
95 * Revision 1.55 2001/11/13 20:14:53 jongfoster
96 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
98 * Revision 1.54 2001/11/07 00:03:14 steudten
99 * Give reliable return value if an error
100 * occurs not just 0 with new daemon mode.
102 * Revision 1.53 2001/11/05 21:41:43 steudten
103 * Add changes to be a real daemon just for unix os.
104 * (change cwd to /, detach from controlling tty, set
105 * process group and session leader to the own process.
107 * Add some fatal-error log message for failed malloc().
108 * Add '-d' if compiled with 'configure --with-debug' to
109 * enable debug output.
111 * Revision 1.52 2001/10/26 20:11:20 jongfoster
112 * Fixing type mismatch
114 * Revision 1.51 2001/10/26 17:38:28 oes
117 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
118 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
119 * threads to call select() simultaneously. So, it's time to do a real, live,
120 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
121 * (native). Both versions will work, but using __OS2__ offers multi-threading.
123 * Revision 1.49 2001/10/23 21:41:35 jongfoster
124 * Added call to initialize the (statically-allocated of course)
125 * "out of memory" CGI response.
127 * Revision 1.48 2001/10/10 19:56:46 jongfoster
128 * Moving some code that wasn't cookie-related out of an #ifdef
131 * Revision 1.47 2001/10/10 16:44:36 oes
132 * Added CONNECT destination port limitation check
134 * Revision 1.46 2001/10/08 15:17:41 oes
135 * Re-enabled SSL forwarding
137 * Revision 1.45 2001/10/07 15:42:11 oes
138 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
140 * Moved downgrading of the HTTP version from parse_http_request to
141 * chat(), since we can't decide if it is necessary before we have
142 * determined the actions for the URL. The HTTP command is now
143 * *always* re-built so the repairs need no longer be special-cased.
145 * filter_popups now gets a csp pointer so it can raise the new
146 * CSP_FLAG_MODIFIED flag.
150 * Added configurable size limit for the IOB. If the IOB grows so
151 * large that the next read would exceed the limit, the header
152 * is generated, and the header & unfiltered buffer are flushed
153 * to the client. Chat then continues in non-buffering,
154 * non-filtering body mode.
156 * Revision 1.44 2001/10/02 18:13:57 oes
159 * Revision 1.43 2001/10/02 15:32:13 oes
160 * Moved generation of hdr
162 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
163 * Cleaning up 2 compiler warnings on OS/2.
165 * Revision 1.41 2001/09/16 17:05:14 jongfoster
166 * Removing unused #include showarg.h
168 * Revision 1.40 2001/09/16 15:41:45 jongfoster
169 * Fixing signed/unsigned comparison warning.
171 * Revision 1.39 2001/09/16 13:21:27 jongfoster
172 * Changes to use new list functions.
174 * Revision 1.38 2001/09/16 13:01:46 jongfoster
175 * Removing redundant function call that zeroed zalloc()'d memory.
177 * Revision 1.37 2001/09/10 11:12:24 oes
178 * Deleted unused variable
180 * Revision 1.36 2001/09/10 10:56:15 oes
181 * Silenced compiler warnings
183 * Revision 1.35 2001/07/31 14:44:22 oes
184 * Deleted unused size parameter from filter_popups()
186 * Revision 1.34 2001/07/30 22:08:36 jongfoster
187 * Tidying up #defines:
188 * - All feature #defines are now of the form FEATURE_xxx
189 * - Permanently turned off WIN_GUI_EDIT
190 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
192 * Revision 1.33 2001/07/29 19:32:00 jongfoster
193 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
195 * Revision 1.32 2001/07/29 18:47:05 jongfoster
196 * Adding missing #include "loadcfg.h"
198 * Revision 1.31 2001/07/29 12:17:48 oes
199 * Applied pthread fix by Paul Lieverse
201 * Revision 1.30 2001/07/25 22:57:13 jongfoster
202 * __BEOS__ no longer overrides FEATURE_PTHREAD.
203 * This is because FEATURE_PTHREAD will soon be widely used, so I
204 * want to keep it simple.
206 * Revision 1.29 2001/07/24 12:47:06 oes
207 * Applied BeOS support update by Eugenia
209 * Revision 1.28 2001/07/23 13:26:12 oes
210 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
212 * Revision 1.27 2001/07/19 19:09:47 haroon
213 * - Added code to take care of the situation where while processing the first
214 * server response (which includes the server header), after finding the end
215 * of the headers we were not looking past the end of the headers for
216 * content modification. I enabled it for filter_popups.
217 * Someone else should look to see if other similar operations should be
218 * done to the discarded portion of the buffer.
220 * Note 2001/07/20: No, the other content modification mechanisms will process
221 * the whole iob later anyway. --oes
223 * Revision 1.26 2001/07/18 12:31:36 oes
226 * Revision 1.25 2001/07/15 19:43:49 jongfoster
227 * Supports POSIX threads.
228 * Also removed some unused #includes.
230 * Revision 1.24 2001/07/13 14:00:40 oes
231 * - Generic content modification scheme:
232 * Each feature has its own applicability flag that is set
233 * from csp->action->flags.
234 * Replaced the "filtering" int flag , by a function pointer
235 * "content_filter" to the function that will do the content
236 * modification. If it is != NULL, the document will be buffered
237 * and processed through *content_filter, which must set
238 * csp->content_length and return a modified copy of the body
239 * or return NULL (on failiure).
240 * - Changed csp->is_text to the more generic bitmap csp->content_type
241 * which can currently take the valued CT_TEXT or CT_GIF
243 * - Removed all #ifdef PCRS
245 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
246 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
247 * the `block_acl' call. This prevents a compilation error when the user
248 * does not wish to use the "ACL" feature.
250 * Revision 1.22 2001/06/29 21:45:41 oes
251 * Indentation, CRLF->LF, Tab-> Space
253 * Revision 1.21 2001/06/29 13:29:36 oes
254 * - Cleaned up, improved comments
255 * - Unified all possible interceptors (CGI,
256 * block, trust, fast_redirect) in one
257 * place, with one (CGI) answer generation
258 * mechansim. Much clearer now.
259 * - Removed the GIF image generation, which
260 * is now done in filters.c:block_url()
261 * - Made error conditions like domain lookup
262 * failiure or (various) problems while talking
263 * to the server use cgi.c:error_response()
264 * instead of generating HTML/HTTP in chat() (yuck!)
265 * - Removed logentry from cancelled commit
267 * Revision 1.20 2001/06/09 10:55:28 jongfoster
268 * Changing BUFSIZ ==> BUFFER_SIZE
270 * Revision 1.19 2001/06/07 23:12:52 jongfoster
271 * Replacing function pointer in struct gateway with a directly
272 * called function forwarded_connect().
273 * Replacing struct gateway with struct forward_spec
275 * Revision 1.18 2001/06/03 19:12:16 oes
276 * introduced new cgi handling
278 * Revision 1.17 2001/06/01 20:07:23 jongfoster
279 * Now uses action +image-blocker{} rather than config->tinygif
281 * Revision 1.16 2001/06/01 18:49:17 jongfoster
282 * Replaced "list_share" with "list" - the tiny memory gain was not
283 * worth the extra complexity.
285 * Revision 1.15 2001/05/31 21:24:47 jongfoster
286 * Changed "permission" to "action" throughout.
287 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
288 * Moved vanilla wafer check into chat(), since we must now
289 * decide whether or not to add it based on the URL.
291 * Revision 1.14 2001/05/29 20:14:01 joergs
292 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
295 * Revision 1.13 2001/05/29 09:50:24 jongfoster
296 * Unified blocklist/imagelist/permissionslist.
297 * File format is still under discussion, but the internal changes
300 * Also modified interceptor behaviour:
301 * - We now intercept all URLs beginning with one of the following
302 * prefixes (and *only* these prefixes):
304 * * http://ijbswa.sf.net/config/
305 * * http://ijbswa.sourceforge.net/config/
306 * - New interceptors "home page" - go to http://i.j.b/ to see it.
307 * - Internal changes so that intercepted and fast redirect pages
308 * are not replaced with an image.
309 * - Interceptors now have the option to send a binary page direct
310 * to the client. (i.e. ijb-send-banner uses this)
311 * - Implemented show-url-info interceptor. (Which is why I needed
312 * the above interceptors changes - a typical URL is
313 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
314 * The previous mechanism would not have intercepted that, and
315 * if it had been intercepted then it then it would have replaced
318 * Revision 1.12 2001/05/27 22:17:04 oes
320 * - re_process_buffer no longer writes the modified buffer
321 * to the client, which was very ugly. It now returns the
322 * buffer, which it is then written by chat.
324 * - content_length now adjusts the Content-Length: header
325 * for modified documents rather than crunch()ing it.
326 * (Length info in csp->content_length, which is 0 for
327 * unmodified documents)
329 * - For this to work, sed() is called twice when filtering.
331 * Revision 1.11 2001/05/26 17:27:53 jongfoster
332 * Added support for CLF and fixed LOG_LEVEL_LOG.
333 * Also did CRLF->LF fix of my previous patch.
335 * Revision 1.10 2001/05/26 15:26:15 jongfoster
336 * ACL feature now provides more security by immediately dropping
337 * connections from untrusted hosts.
339 * Revision 1.9 2001/05/26 00:28:36 jongfoster
340 * Automatic reloading of config file.
341 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
342 * Most of the global variables have been moved to a new
343 * struct configuration_spec, accessed through csp->config->globalname
344 * Most of the globals remaining are used by the Win32 GUI.
346 * Revision 1.8 2001/05/25 22:43:18 jongfoster
347 * Fixing minor memory leak and buffer overflow.
349 * Revision 1.7 2001/05/25 22:34:30 jongfoster
352 * Revision 1.6 2001/05/23 00:13:58 joergs
353 * AmigaOS support fixed.
355 * Revision 1.5 2001/05/22 18:46:04 oes
357 * - Enabled filtering banners by size rather than URL
358 * by adding patterns that replace all standard banner
359 * sizes with the "Junkbuster" gif to the re_filterfile
361 * - Enabled filtering WebBugs by providing a pattern
362 * which kills all 1x1 images
364 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
365 * which is selected by the (nonstandard and therefore
366 * capital) letter 'U' in the option string.
367 * It causes the quantifiers to be ungreedy by default.
368 * Appending a ? turns back to greedy (!).
370 * - Added a new interceptor ijb-send-banner, which
371 * sends back the "Junkbuster" gif. Without imagelist or
372 * MSIE detection support, or if tinygif = 1, or the
373 * URL isn't recognized as an imageurl, a lame HTML
374 * explanation is sent instead.
376 * - Added new feature, which permits blocking remote
377 * script redirects and firing back a local redirect
379 * The feature is conditionally compiled, i.e. it
380 * can be disabled with --disable-fast-redirects,
381 * plus it must be activated by a "fast-redirects"
382 * line in the config file, has its own log level
383 * and of course wants to be displayed by show-proxy-args
384 * Note: Boy, all the #ifdefs in 1001 locations and
385 * all the fumbling with configure.in and acconfig.h
386 * were *way* more work than the feature itself :-(
388 * - Because a generic redirect template was needed for
389 * this, tinygif = 3 now uses the same.
391 * - Moved GIFs, and other static HTTP response templates
396 * - Removed some >400 CRs again (Jon, you really worked
399 * Revision 1.4 2001/05/21 19:34:01 jongfoster
400 * Made failure to bind() a fatal error.
402 * Revision 1.3 2001/05/20 01:21:20 jongfoster
403 * Version 2.9.4 checkin.
404 * - Merged popupfile and cookiefile, and added control over PCRS
405 * filtering, in new "permissionsfile".
406 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
407 * file error you now get a message box (in the Win32 GUI) rather
408 * than the program exiting with no explanation.
409 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
411 * - Removed tabs from "config"
412 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
413 * - Bumped up version number.
415 * Revision 1.2 2001/05/17 22:34:44 oes
416 * - Added hint on GIF char array generation to jcc.c
417 * - Cleaned CRLF's from the sources and related files
418 * - Repaired logging for REF and FRC
420 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
421 * Initial import of version 2.9.3 source tree
424 *********************************************************************/
430 #include <sys/types.h>
437 #ifdef FEATURE_PTHREAD
439 #endif /* def FEATURE_PTHREAD */
442 # ifndef FEATURE_PTHREAD
443 # include <windows.h>
444 # include <process.h>
445 # endif /* ndef FEATURE_PTHREAD */
448 # ifndef _WIN_CONSOLE
450 # endif /* ndef _WIN_CONSOLE */
452 #else /* ifndef _WIN32 */
454 # if !defined (__OS2__)
456 # include <sys/wait.h>
457 # endif /* ndef __OS2__ */
458 # include <sys/time.h>
459 # include <sys/stat.h>
460 # include <sys/ioctl.h>
463 #include <sys/termios.h>
469 # include <socket.h> /* BeOS has select() for sockets only. */
470 # include <OS.h> /* declarations for threads and stuff. */
473 # if defined(__EMX__) || defined(__OS2__)
474 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
479 #define bzero(B,N) memset(B,0x00,n)
494 #include "killpopup.h"
495 #include "miscutil.h"
497 #include "jbsockets.h"
502 #include "urlmatch.h"
504 const char jcc_h_rcs[] = JCC_H_VERSION;
505 const char project_h_rcs[] = PROJECT_H_VERSION;
508 struct client_state clients[1];
509 struct file_list files[1];
511 #ifdef FEATURE_STATISTICS
512 int urls_read = 0; /* total nr of urls read inc rejected */
513 int urls_rejected = 0; /* total nr of urls rejected */
514 #endif /* def FEATURE_STATISTICS */
517 static void listen_loop(void);
518 static void chat(struct client_state *csp);
520 void serve(struct client_state *csp);
521 #else /* ifndef AMIGA */
522 static void serve(struct client_state *csp);
523 #endif /* def AMIGA */
526 static int32 server_thread(void *data);
527 #endif /* def __BEOS__ */
530 #define sleep(N) Sleep(((N) * 1000))
534 #define sleep(N) DosSleep(((N) * 100))
539 const char *pidfile = NULL;
540 int received_hup_signal = 0;
541 #endif /* defined unix */
543 /* The vanilla wafer. */
544 static const char VANILLA_WAFER[] =
545 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
546 "Do_not_send_me_any_copyrighted_information_other_than_the_"
547 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
548 "In_particular_do_not_send_me_any_cookies_that_"
549 "are_subject_to_a_claim_of_copyright_by_anybody._"
550 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
551 "(copyright_or_otherwise)_applying_to_any_cookie._";
554 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
555 /*********************************************************************
557 * Function : sig_handler
559 * Description : Signal handler for different signals.
560 * Exit gracefully on ABRT, TERM and INT
561 * or set a flag that will cause the errlog
562 * to be reopened by the main thread on HUP.
565 * 1 : the_signal - the signal cause this function to call
569 *********************************************************************/
570 static void sig_handler(int the_signal)
577 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
585 received_hup_signal = 1;
590 * We shouldn't be here, unless we catch signals
591 * in main() that we can't handle here!
593 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
601 /*********************************************************************
605 * Description : Once a connection to the client has been accepted,
606 * this function is called (via serve()) to handle the
607 * main business of the communication. When this
608 * function returns, the caller must close the client
612 * 1 : csp = Current client state (buffers, headers, etc...)
614 * Returns : On success, the number of bytes written are returned (zero
615 * indicates nothing was written). On error, -1 is returned,
616 * and errno is set appropriately. If count is zero and the
617 * file descriptor refers to a regular file, 0 will be
618 * returned without causing any other effect. For a special
619 * file, the results are not portable.
621 *********************************************************************/
622 static void chat(struct client_state *csp)
625 * This next lines are a little ugly, but they simplifies the if statements
626 * below. Basically if TOGGLE, then we want the if to test if the
627 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
628 * then we want the if to test for CSP_FLAG_FORCED , else we don't
630 #ifdef FEATURE_TOGGLE
631 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
632 #else /* ifndef FEATURE_TOGGLE */
633 # define IS_TOGGLED_ON_AND
634 #endif /* ndef FEATURE_TOGGLE */
635 #ifdef FEATURE_FORCE_LOAD
636 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
637 #else /* ifndef FEATURE_FORCE_LOAD */
638 # define IS_NOT_FORCED_AND
639 #endif /* def FEATURE_FORCE_LOAD */
641 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
643 char buf[BUFFER_SIZE];
646 int n, maxfd, server_body;
647 int ms_iis5_hack = 0;
649 const struct forward_spec * fwd;
650 struct http_request *http;
651 #ifdef FEATURE_KILL_POPUPS
652 int block_popups; /* bool, 1==will block popups */
653 int block_popups_now = 0; /* bool, 1==currently blocking popups */
654 #endif /* def FEATURE_KILL_POPUPS */
656 int pcrs_filter; /* bool, 1==will filter through pcrs */
657 int gif_deanimate; /* bool, 1==will deanimate gifs */
659 /* Function that does the content filtering for the current request */
660 char *(*content_filter)() = NULL;
662 /* Skeleton for HTTP response, if we should intercept the request */
663 struct http_response *rsp;
668 * Read the client's request. Note that since we're not using select() we
669 * could get blocked here if a client connected, then didn't say anything!
674 n = read_socket(csp->cfd, buf, sizeof(buf));
676 if (n <= 0) break; /* error! */
678 add_to_iob(csp, buf, n);
680 req = get_header(csp);
684 break; /* no HTTP request! */
689 continue; /* more to come! */
692 #ifdef FEATURE_FORCE_LOAD
693 /* If this request contains the FORCE_PREFIX,
694 * better get rid of it now and set the force flag --oes
697 if (strstr(req, FORCE_PREFIX))
699 strclean(req, FORCE_PREFIX);
700 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
701 csp->flags |= CSP_FLAG_FORCED;
704 #endif /* def FEATURE_FORCE_LOAD */
706 parse_http_request(req, http, csp);
711 if (http->cmd == NULL)
713 strcpy(buf, CHEADER);
714 write_socket(csp->cfd, buf, strlen(buf));
716 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
721 /* decide how to route the HTTP request */
723 if ((fwd = forward_url(http, csp)) == NULL)
725 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
726 /* Never get here - LOG_LEVEL_FATAL causes program exit */
729 /* build the http request to send to the server
730 * we have to do one of the following:
732 * create = use the original HTTP request to create a new
733 * HTTP request that has either the path component
734 * without the http://domainspec (w/path) or the
735 * full orininal URL (w/url)
736 * Note that the path and/or the HTTP version may
737 * have been altered by now.
739 * connect = Open a socket to the host:port of the server
740 * and short-circuit server and client socket.
742 * pass = Pass the request unchanged if forwarding a CONNECT
743 * request to a parent proxy. Note that we'll be sending
744 * the CFAIL message ourselves if connecting to the parent
745 * fails, but we won't send a CSUCCEED message if it works,
746 * since that would result in a double message (ours and the
747 * parent's). After sending the request to the parent, we simply
753 * +--------+--------+
755 * 0 | create | connect|
757 * Forwarding +--------+--------+
759 * 1 | create | pass |
761 * +--------+--------+
766 * Determine the actions for this URL
768 #ifdef FEATURE_TOGGLE
769 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
771 /* Most compatible set of actions (i.e. none) */
772 init_current_action(csp->action);
775 #endif /* ndef FEATURE_TOGGLE */
777 url_actions(http, csp);
782 * Check if a CONNECT request is allowable:
783 * In the absence of a +limit-connect action, allow only port 443.
784 * If there is an action, allow whatever matches the specificaton.
788 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
789 || (csp->action->flags & ACTION_LIMIT_CONNECT
790 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
792 strcpy(buf, CFORBIDDEN);
793 write_socket(csp->cfd, buf, strlen(buf));
795 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
796 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
804 * Downgrade http version from 1.1 to 1.0 if +downgrade
807 if ( (http->ssl == 0)
808 && (!strcmpic(http->ver, "HTTP/1.1"))
809 && (csp->action->flags & ACTION_DOWNGRADE))
812 http->ver = strdup("HTTP/1.0");
814 if (http->ver == NULL)
816 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
821 * Save a copy of the original request for logging
823 http->ocmd = strdup(http->cmd);
825 if (http->ocmd == NULL)
827 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
831 * (Re)build the HTTP request for non-SSL requests.
832 * If forwarding, use the whole URL, else, use only the path.
838 http->cmd = strdup(http->gpc);
839 string_append(&http->cmd, " ");
841 if (fwd->forward_host)
843 string_append(&http->cmd, http->url);
847 string_append(&http->cmd, http->path);
850 string_append(&http->cmd, " ");
851 string_append(&http->cmd, http->ver);
853 if (http->cmd == NULL)
855 log_error(LOG_LEVEL_FATAL, "Out of memory rewiting SSL command");
858 enlist(csp->headers, http->cmd);
861 #ifdef FEATURE_COOKIE_JAR
863 * If we're logging cookies in a cookie jar, and the user has not
864 * supplied any wafers, and the user has not told us to suppress the
865 * vanilla wafer, then send the vanilla wafer.
867 if ((csp->config->jarfile != NULL)
868 && list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
869 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
871 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
873 #endif /* def FEATURE_COOKIE_JAR */
876 #ifdef FEATURE_KILL_POPUPS
877 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
878 #endif /* def FEATURE_KILL_POPUPS */
880 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
881 ((csp->action->flags & ACTION_FILTER) != 0);
883 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
885 /* grab the rest of the client's headers */
889 if ( ( p = get_header(csp) ) && ( *p == '\0' ) )
891 n = read_socket(csp->cfd, buf, sizeof(buf));
894 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
897 add_to_iob(csp, buf, n);
901 if (p == NULL) break;
903 enlist(csp->headers, p);
907 * We have a request. Now, check to see if we need to
908 * intercept it, i.e. If ..
912 /* a CGI call was detected and answered */
913 (NULL != (rsp = dispatch_cgi(csp)))
915 /* or we are enabled and... */
918 /* ..the request was blocked */
919 ( NULL != (rsp = block_url(csp)))
923 || ( NULL != (rsp = trust_url(csp)))
924 #endif /* def FEATURE_TRUST */
926 /* ..or a fast redirect kicked in */
927 #ifdef FEATURE_FAST_REDIRECTS
928 || (((csp->action->flags & ACTION_FAST_REDIRECTS) != 0) &&
929 (NULL != (rsp = redirect_url(csp))))
930 #endif /* def FEATURE_FAST_REDIRECTS */
934 /* Write the answer to the client */
935 if ((write_socket(csp->cfd, rsp->head, rsp->head_length) != rsp->head_length)
936 || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length))
938 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
941 #ifdef FEATURE_STATISTICS
942 /* Count as a rejected request */
943 csp->flags |= CSP_FLAG_REJECTED;
944 #endif /* def FEATURE_STATISTICS */
946 /* Log (FIXME: All intercept reasons apprear as "crunch" with Status 200) */
947 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
948 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
950 /* Clean up and return */
951 free_http_response(rsp);
955 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
957 if (fwd->forward_host)
959 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
960 fwd->forward_host, fwd->forward_port, http->hostport);
964 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
967 /* here we connect to the server, gateway, or the forwarder */
969 csp->sfd = forwarded_connect(fwd, http, csp);
973 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
978 rsp = error_response(csp, "no-such-domain", errno);
980 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
981 csp->ip_addr_str, http->ocmd);
985 rsp = error_response(csp, "connect-failed", errno);
987 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
988 csp->ip_addr_str, http->ocmd);
992 /* Write the answer to the client */
995 if ((write_socket(csp->cfd, rsp->head, rsp->head_length) != rsp->head_length)
996 || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length))
998 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1002 free_http_response(rsp);
1006 log_error(LOG_LEVEL_CONNECT, "OK");
1008 hdr = sed(client_patterns, add_client_headers, csp);
1011 /* FIXME Should handle error properly */
1012 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1015 list_remove_all(csp->headers);
1017 if (fwd->forward_host || (http->ssl == 0))
1019 /* write the client's (modified) header to the server
1020 * (along with anything else that may be in the buffer)
1025 if ((write_socket(csp->sfd, hdr, n) != n)
1026 || (flush_socket(csp->sfd, csp ) < 0))
1028 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1031 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1032 csp->ip_addr_str, http->ocmd);
1034 rsp = error_response(csp, "connect-failed", errno);
1038 if ((write_socket(csp->cfd, rsp->head, rsp->head_length) != rsp->head_length)
1039 || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length))
1041 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1045 free_http_response(rsp);
1053 * We're running an SSL tunnel and we're not forwarding,
1054 * so just send the "connect succeeded" message to the
1055 * client, flush the rest, and get out of the way.
1057 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1058 csp->ip_addr_str, http->ocmd);
1060 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1) < 0)
1068 /* we're finished with the client's header */
1071 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1073 /* pass data between the client and server
1074 * until one or the other shuts down the connection.
1083 FD_SET(csp->cfd, &rfds);
1084 FD_SET(csp->sfd, &rfds);
1086 n = select(maxfd+1, &rfds, NULL, NULL, NULL);
1090 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1094 /* this is the body of the browser's request
1095 * just read it and write it.
1098 if (FD_ISSET(csp->cfd, &rfds))
1100 n = read_socket(csp->cfd, buf, sizeof(buf));
1104 break; /* "game over, man" */
1107 if (write_socket(csp->sfd, buf, n) != n)
1109 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1116 * The server wants to talk. It could be the header or the body.
1117 * If `hdr' is null, then it's the header otherwise it's the body.
1118 * FIXME: Does `hdr' really mean `host'? No.
1122 if (FD_ISSET(csp->sfd, &rfds))
1125 n = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1129 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1131 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1132 csp->ip_addr_str, http->ocmd);
1134 rsp = error_response(csp, "connect-failed", errno);
1138 if ((write_socket(csp->cfd, rsp->head, rsp->head_length) != rsp->head_length)
1139 || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length))
1141 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1145 free_http_response(rsp);
1149 /* Add a trailing zero. This lets filter_popups
1150 * use string operations.
1154 #ifdef FEATURE_KILL_POPUPS
1155 /* Filter the popups on this read. */
1156 if (block_popups_now)
1158 filter_popups(buf, csp);
1160 #endif /* def FEATURE_KILL_POPUPS */
1162 /* Normally, this would indicate that we've read
1163 * as much as the server has sent us and we can
1164 * close the client connection. However, Microsoft
1165 * in its wisdom has released IIS/5 with a bug that
1166 * prevents it from sending the trailing \r\n in
1167 * a 302 redirect header (and possibly other headers).
1168 * To work around this if we've haven't parsed
1169 * a full header we'll append a trailing \r\n
1170 * and see if this now generates a valid one.
1172 * This hack shouldn't have any impacts. If we've
1173 * already transmitted the header or if this is a
1174 * SSL connection, then we won't bother with this
1175 * hack. So we only work on partially received
1176 * headers. If we append a \r\n and this still
1177 * doesn't generate a valid header, then we won't
1178 * transmit anything to the client.
1183 if (server_body || http->ssl)
1186 * If we have been buffering up the document,
1187 * now is the time to apply content modification
1188 * and send the result to the client.
1193 * If the content filter fails, use the original
1194 * buffer and length.
1195 * (see p != NULL ? p : csp->iob->cur below)
1197 if (NULL == (p = (*content_filter)(csp)))
1199 csp->content_length = csp->iob->eod - csp->iob->cur;
1202 hdr = sed(server_patterns, add_server_headers, csp);
1205 /* FIXME Should handle error properly */
1206 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1211 if ((write_socket(csp->cfd, hdr, n) != n)
1212 || (write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length) != (int)csp->content_length))
1214 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1224 break; /* "game over, man" */
1228 * This is NOT the body, so
1229 * Let's pretend the server just sent us a blank line.
1231 n = sprintf(buf, "\r\n");
1234 * Now, let the normal header parsing algorithm below do its
1235 * job. If it fails, we'll exit instead of continuing.
1242 * If this is an SSL connection or we're in the body
1243 * of the server document, just write it to the client,
1244 * unless we need to buffer the body for later content-filtering
1247 if (server_body || http->ssl)
1251 add_to_iob(csp, buf, n);
1254 * If the buffer limit will be reached on the next read,
1255 * switch to non-filtering mode, i.e. make & write the
1256 * header, flush the socket and get out of the way.
1258 if (((size_t)(csp->iob->eod - csp->iob->buf)) + (size_t)BUFFER_SIZE > csp->config->buffer_limit)
1260 log_error(LOG_LEVEL_ERROR, "Buffer size limit reached! Flushing and stepping back.");
1262 hdr = sed(server_patterns, add_server_headers, csp);
1265 /* FIXME Should handle error properly */
1266 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1272 if (((write_socket(csp->cfd, hdr, n) != n)
1273 || (n = flush_socket(csp->cfd, csp) < 0)))
1275 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1284 content_filter = NULL;
1291 if (write_socket(csp->cfd, buf, n) != n)
1293 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
1302 /* we're still looking for the end of the
1303 * server's header ... (does that make header
1304 * parsing an "out of body experience" ?
1307 /* buffer up the data we just read */
1308 add_to_iob(csp, buf, n);
1310 /* get header lines from the iob */
1312 while ((p = get_header(csp)))
1316 /* see following note */
1319 enlist(csp->headers, p);
1323 /* NOTE: there are no "empty" headers so
1324 * if the pointer `p' is not NULL we must
1325 * assume that we reached the end of the
1326 * buffer before we hit the end of the header.
1333 /* Well, we tried our MS IIS/5
1334 * hack and it didn't work.
1335 * The header is incomplete
1336 * and there isn't anything
1337 * we can do about it.
1343 /* Since we have to wait for
1344 * more from the server before
1345 * we can parse the headers
1346 * we just continue here.
1352 /* we have now received the entire header.
1353 * filter it and send the result to the client
1356 hdr = sed(server_patterns, add_server_headers, csp);
1359 /* FIXME Should handle error properly */
1360 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1365 /* write the server's (modified) header to
1366 * the client (along with anything else that
1367 * may be in the buffer)
1370 #ifdef FEATURE_KILL_POPUPS
1371 /* Start blocking popups if appropriate. */
1373 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1374 !http->ssl && /* We talk plaintext */
1375 block_popups) /* Policy allows */
1377 block_popups_now = 1;
1379 * Filter the part of the body that came in the same read
1380 * as the last headers:
1382 filter_popups(csp->iob->cur, csp);
1385 #endif /* def FEATURE_KILL_POPUPS */
1387 /* Buffer and pcrs filter this if appropriate. */
1389 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1390 !http->ssl && /* We talk plaintext */
1391 pcrs_filter) /* Policy allows */
1393 content_filter = pcrs_filter_response;
1396 /* Buffer and gif_deanimate this if appropriate. */
1398 if ((csp->content_type & CT_GIF) && /* It's a image/gif MIME-Type */
1399 !http->ssl && /* We talk plaintext */
1400 gif_deanimate) /* Policy allows */
1402 content_filter = gif_deanimate_response;
1407 * Only write if we're not buffering for content modification
1409 if (!content_filter && ((write_socket(csp->cfd, hdr, n) != n)
1410 || (n = flush_socket(csp->cfd, csp) < 0)))
1412 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1414 /* the write failed, so don't bother
1415 * mentioning it to the client...
1416 * it probably can't hear us anyway.
1422 if(!content_filter) byte_count += n;
1424 /* we're finished with the server's header */
1429 /* If this was a MS IIS/5 hack then it means
1430 * the server has already closed the
1431 * connection. Nothing more to read. Time
1442 return; /* huh? we should never get here */
1445 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
1446 csp->ip_addr_str, http->ocmd, byte_count);
1450 /*********************************************************************
1454 * Description : This is little more than chat. We only "serve" to
1455 * to close any socket that chat may have opened.
1458 * 1 : csp = Current client state (buffers, headers, etc...)
1462 *********************************************************************/
1464 void serve(struct client_state *csp)
1465 #else /* ifndef AMIGA */
1466 static void serve(struct client_state *csp)
1467 #endif /* def AMIGA */
1470 close_socket(csp->cfd);
1474 close_socket(csp->sfd);
1477 csp->flags &= ~CSP_FLAG_ACTIVE;
1483 /*********************************************************************
1485 * Function : server_thread
1487 * Description : We only exist to call `serve' in a threaded environment.
1490 * 1 : data = Current client state (buffers, headers, etc...)
1492 * Returns : Always 0.
1494 *********************************************************************/
1495 static int32 server_thread(void *data)
1497 serve((struct client_state *) data);
1504 /*********************************************************************
1508 * Description : Print usage info & exit.
1510 * Parameters : Pointer to argv[0] for identifying ourselves
1514 *********************************************************************/
1515 void usage(const char *myname)
1517 printf("JunkBuster proxy version " VERSION " (" HOME_PAGE_URL ")\n"
1518 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [configfile]\n"
1519 "Aborting.\n", myname);
1526 /*********************************************************************
1530 * Description : Load the config file and start the listen loop.
1531 * This function is a lot more *sane* with the `load_config'
1532 * and `listen_loop' functions; although it stills does
1533 * a *little* too much for my taste.
1536 * 1 : argc = Number of parameters (including $0).
1537 * 2 : argv = Array of (char *)'s to the parameters.
1539 * Returns : 1 if : can't open config file, unrecognized directive,
1540 * stats requested in multi-thread mode, can't open the
1541 * log file, can't open the jar file, listen port is invalid,
1542 * any load fails, and can't bind port.
1544 * Else main never returns, the process must be signaled
1545 * to terminate execution. Or, on Windows, use the
1546 * "File", "Exit" menu option.
1548 *********************************************************************/
1550 int real_main(int argc, const char *argv[])
1552 int main(int argc, const char *argv[])
1561 #if !defined(_WIN32)
1569 * Parse the command line arguments
1571 while (++argc_pos < argc)
1573 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1575 if (strcmp(argv[argc_pos], "--help") == 0)
1580 else if(strcmp(argv[argc_pos], "--version") == 0)
1582 printf("Junkbuster version " VERSION " (" HOME_PAGE_URL ")\n");
1586 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
1591 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
1593 if (++argc_pos == argc) usage(argv[0]);
1594 pidfile = strdup(argv[argc_pos]);
1597 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
1599 configfile = argv[argc_pos];
1602 } /* -END- while (more arguments) */
1605 if ( *configfile != '/' )
1609 /* make config-filename absolute here */
1610 if ( !(basedir = getcwd( NULL, 1024 )))
1612 perror("get working dir failed");
1616 if ( !(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 )))
1618 perror("malloc failed");
1621 strcpy( abs_file, basedir );
1622 strcat( abs_file, "/" );
1623 strcat( abs_file, configfile );
1624 configfile = abs_file;
1626 #endif /* defined unix */
1633 #elif defined(_WIN32)
1638 * Unix signal handling
1640 * Catch the abort, interrupt and terminate signals for a graceful exit
1641 * Catch the hangup signal so the errlog can be reopened.
1642 * Ignore the broken pipe and child signals
1643 * FIXME: Isn't ignoring the default for SIGCHLD anyway and why ignore SIGPIPE?
1645 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1648 const int catched_signals[] = { SIGABRT, SIGTERM, SIGINT, SIGHUP, 0 };
1649 const int ignored_signals[] = { SIGPIPE, SIGCHLD, 0 };
1651 for (idx = 0; catched_signals[idx] != 0; idx++)
1653 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
1655 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
1659 for (idx = 0; ignored_signals[idx] != 0; idx++)
1661 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
1663 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
1668 #else /* ifdef _WIN32 */
1669 # ifdef _WIN_CONSOLE
1671 * We *are* in a windows console app.
1672 * Print a verbose messages about FAQ's and such
1674 printf(win32_blurb);
1675 # endif /* def _WIN_CONSOLE */
1676 #endif /* def _WIN32 */
1679 /* Initialize the CGI subsystem */
1680 cgi_init_error_messages();
1683 * If runnig on unix and without the --nodaemon
1684 * option, become a daemon. I.e. fork, detach
1685 * from tty and get process group leadership
1698 if ( pid < 0 ) /* error */
1703 else if ( pid != 0 ) /* parent */
1708 * must check for errors
1709 * child died due to missing files aso
1712 wpid = waitpid( pid, &status, WNOHANG );
1721 /* Should be more portable, but not as well tested */
1726 #else /* ndef __FreeBSD__ */
1728 #endif /* ndef __FreeBSD__ */
1729 fd = open("/dev/tty", O_RDONLY);
1732 /* no error check here */
1733 ioctl( fd, TIOCNOTTY,0 );
1737 /* FIXME: should close stderr (fd 2) here too, but the test
1739 * and load config file is done in listen_loop() and puts
1740 * some messages on stderr there.
1749 } /* -END- if (!no_daemon) */
1751 #endif /* defined unix */
1761 /*********************************************************************
1763 * Function : bind_port_helper
1765 * Description : Bind the listen port. Handles logging, and aborts
1769 * 1 : config = Junkbuster configuration. Specifies port
1772 * Returns : Port that was opened.
1774 *********************************************************************/
1775 static int bind_port_helper(struct configuration_spec * config)
1779 if ( (config->haddr != NULL)
1780 && (config->haddr[0] == '1')
1781 && (config->haddr[1] == '2')
1782 && (config->haddr[2] == '7')
1783 && (config->haddr[3] == '.') )
1785 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
1788 else if (config->haddr == NULL)
1790 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
1795 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
1796 config->hport, config->haddr);
1799 bfd = bind_port(config->haddr, config->hport);
1803 log_error(LOG_LEVEL_FATAL, "can't bind %s:%d: %E "
1804 "- There may be another junkbuster or some other "
1805 "proxy running on port %d",
1806 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
1807 config->hport, config->hport
1809 /* shouldn't get here */
1813 config->need_bind = 0;
1819 /*********************************************************************
1821 * Function : listen_loop
1823 * Description : bind the listen port and enter a "FOREVER" listening loop.
1829 *********************************************************************/
1830 static void listen_loop(void)
1832 struct client_state *csp = NULL;
1834 struct configuration_spec * config;
1836 config = load_config();
1838 bfd = bind_port_helper(config);
1842 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
1843 while (waitpid(-1, NULL, WNOHANG) > 0)
1845 /* zombie children */
1847 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
1850 * Free data that was used by died threads
1856 * Re-open the errlog after HUP signal
1858 if (received_hup_signal)
1860 init_error_log(Argv[0], config->logfile, config->debug);
1861 received_hup_signal = 0;
1865 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
1867 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
1871 csp->flags |= CSP_FLAG_ACTIVE;
1874 csp->config = config = load_config();
1876 if ( config->need_bind )
1879 * Since we were listening to the "old port", we will not see
1880 * a "listen" param change until the next IJB request. So, at
1881 * least 1 more request must be made for us to find the new
1882 * setting. I am simply closing the old socket and binding the
1885 * Which-ever is correct, we will serve 1 more page via the
1886 * old settings. This should probably be a "show-proxy-args"
1887 * request. This should not be a so common of an operation
1888 * that this will hurt people's feelings.
1893 bfd = bind_port_helper(config);
1896 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
1898 if (!accept_connection(csp, bfd))
1900 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
1913 log_error(LOG_LEVEL_CONNECT, "OK");
1916 #ifdef FEATURE_TOGGLE
1919 csp->flags |= CSP_FLAG_TOGGLED_ON;
1921 #endif /* def FEATURE_TOGGLE */
1923 if (run_loader(csp))
1925 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
1926 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1930 if (block_acl(NULL,csp))
1932 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
1933 close_socket(csp->cfd);
1937 #endif /* def FEATURE_ACL */
1939 /* add it to the list of clients */
1940 csp->next = clients->next;
1941 clients->next = csp;
1943 if (config->multi_threaded)
1947 /* this is a switch () statment in the C preprocessor - ugh */
1948 #undef SELECTED_ONE_OPTION
1950 /* Use Pthreads in preference to native code */
1951 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
1952 #define SELECTED_ONE_OPTION
1954 pthread_t the_thread;
1955 pthread_attr_t attrs;
1957 pthread_attr_init(&attrs);
1958 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
1959 child_id = (pthread_create(&the_thread, &attrs,
1960 (void*)serve, csp) ? -1 : 0);
1961 pthread_attr_destroy(&attrs);
1965 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
1966 #define SELECTED_ONE_OPTION
1967 child_id = _beginthread(
1973 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
1974 #define SELECTED_ONE_OPTION
1975 child_id = _beginthread(
1982 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
1983 #define SELECTED_ONE_OPTION
1985 thread_id tid = spawn_thread
1986 (server_thread, "server", B_NORMAL_PRIORITY, csp);
1988 if ((tid >= 0) && (resume_thread(tid) == B_OK))
1990 child_id = (int) tid;
1999 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2000 #define SELECTED_ONE_OPTION
2001 csp->cfd = ReleaseSocket(csp->cfd, -1);
2002 if((child_id = (int)CreateNewProcTags(
2003 NP_Entry, (ULONG)server_thread,
2004 NP_Output, Output(),
2005 NP_CloseOutput, FALSE,
2006 NP_Name, (ULONG)"junkbuster child",
2007 NP_StackSize, 200*1024,
2011 ((struct Task *)child_id)->tc_UserData = csp;
2012 Signal((struct Task *)child_id, SIGF_SINGLE);
2017 #if !defined(SELECTED_ONE_OPTION)
2020 /* This block is only needed when using fork().
2021 * When using threads, the server thread was
2022 * created and run by the call to _beginthread().
2024 if (child_id == 0) /* child */
2030 else if (child_id > 0) /* parent */
2032 /* in a fork()'d environment, the parent's
2033 * copy of the client socket and the CSP
2037 #if !defined(_WIN32) && defined(__CYGWIN__)
2039 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
2040 close_socket(csp->cfd);
2041 csp->flags &= ~CSP_FLAG_ACTIVE;
2045 #undef SELECTED_ONE_OPTION
2046 /* end of cpp switch () */
2048 if (child_id < 0) /* failed */
2050 char buf[BUFFER_SIZE];
2052 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
2054 sprintf(buf , "JunkBuster: can't fork: errno = %d", errno);
2056 write_socket(csp->cfd, buf, strlen(buf));
2057 close_socket(csp->cfd);
2058 csp->flags &= ~CSP_FLAG_ACTIVE;