1 const char jcc_rcs[] = "$Id: jcc.c,v 1.73 2002/03/05 23:57:30 hal9 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 1.73 2002/03/05 23:57:30 hal9
37 * Stray character 's' on line 1618 was breaking build.
39 * Revision 1.72 2002/03/05 21:33:45 david__schmidt
40 * - Re-enable OS/2 building after new parms were added
41 * - Fix false out of memory report when resolving CGI templates when no IP
42 * address is available of failed attempt (a la no such domain)
44 * Revision 1.71 2002/03/05 18:13:56 oes
47 * Revision 1.70 2002/03/05 04:52:42 oes
48 * Deleted non-errlog debugging code
50 * Revision 1.69 2002/03/04 23:50:00 jongfoster
51 * Splitting off bind_port() call into bind_port_helper(), with
54 * Revision 1.68 2002/03/04 20:17:32 oes
57 * Revision 1.67 2002/03/04 18:18:57 oes
58 * - Removed _DEBUG mode
59 * - Cleand up cmdline parsing
60 * - Introduced --no-daemon, --pidfile options
61 * - Cleaned up signal handling:
62 * - Terminate cleanly on INT, TERM and ABRT
63 * - Schedule logfile for re-opening on HUP
64 * - Ignore CHLD and PIPE
65 * - Leave the rest with their default handlers
66 * - Uniform handler registration
67 * - Added usage() function
68 * - Played styleguide police
70 * Revision 1.66 2002/03/03 15:06:55 oes
71 * Re-enabled automatic config reloading
73 * Revision 1.65 2002/03/03 14:49:11 oes
74 * Fixed CLF logging: Now uses client's original HTTP request
76 * Revision 1.64 2002/03/03 09:18:03 joergs
77 * Made jumbjuster work on AmigaOS again.
79 * Revision 1.63 2002/03/02 04:14:50 david__schmidt
80 * Clean up a little CRLF unpleasantness that suddenly appeared
82 * Revision 1.62 2002/02/20 23:17:23 jongfoster
83 * Detecting some out-of memory conditions and exiting with a log message.
85 * Revision 1.61 2002/01/17 21:01:52 jongfoster
86 * Moving all our URL and URL pattern parsing code to urlmatch.c.
88 * Revision 1.60 2001/12/30 14:07:32 steudten
89 * - Add signal handling (unix)
90 * - Add SIGHUP handler (unix)
91 * - Add creation of pidfile (unix)
92 * - Add action 'top' in rc file (RH)
93 * - Add entry 'SIGNALS' to manpage
94 * - Add exit message to logfile (unix)
96 * Revision 1.59 2001/12/13 14:07:18 oes
97 * Fixed Bug: 503 error page now sent OK
99 * Revision 1.58 2001/11/30 23:37:24 jongfoster
100 * Renaming the Win32 config file to config.txt - this is almost the
101 * same as the corresponding UNIX name "config"
103 * Revision 1.57 2001/11/16 00:47:43 jongfoster
104 * Changing the tty-disconnection code to use setsid().
106 * Revision 1.56 2001/11/13 20:20:54 jongfoster
107 * Tabs->spaces, fixing a bug with missing {} around an if()
109 * Revision 1.55 2001/11/13 20:14:53 jongfoster
110 * Patch for FreeBSD setpgrp() as suggested by Alexander Lazic
112 * Revision 1.54 2001/11/07 00:03:14 steudten
113 * Give reliable return value if an error
114 * occurs not just 0 with new daemon mode.
116 * Revision 1.53 2001/11/05 21:41:43 steudten
117 * Add changes to be a real daemon just for unix os.
118 * (change cwd to /, detach from controlling tty, set
119 * process group and session leader to the own process.
121 * Add some fatal-error log message for failed malloc().
122 * Add '-d' if compiled with 'configure --with-debug' to
123 * enable debug output.
125 * Revision 1.52 2001/10/26 20:11:20 jongfoster
126 * Fixing type mismatch
128 * Revision 1.51 2001/10/26 17:38:28 oes
131 * Revision 1.50 2001/10/25 03:40:48 david__schmidt
132 * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple
133 * threads to call select() simultaneously. So, it's time to do a real, live,
134 * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__
135 * (native). Both versions will work, but using __OS2__ offers multi-threading.
137 * Revision 1.49 2001/10/23 21:41:35 jongfoster
138 * Added call to initialize the (statically-allocated of course)
139 * "out of memory" CGI response.
141 * Revision 1.48 2001/10/10 19:56:46 jongfoster
142 * Moving some code that wasn't cookie-related out of an #ifdef
145 * Revision 1.47 2001/10/10 16:44:36 oes
146 * Added CONNECT destination port limitation check
148 * Revision 1.46 2001/10/08 15:17:41 oes
149 * Re-enabled SSL forwarding
151 * Revision 1.45 2001/10/07 15:42:11 oes
152 * Replaced 6 boolean members of csp with one bitmap (csp->flags)
154 * Moved downgrading of the HTTP version from parse_http_request to
155 * chat(), since we can't decide if it is necessary before we have
156 * determined the actions for the URL. The HTTP command is now
157 * *always* re-built so the repairs need no longer be special-cased.
159 * filter_popups now gets a csp pointer so it can raise the new
160 * CSP_FLAG_MODIFIED flag.
164 * Added configurable size limit for the IOB. If the IOB grows so
165 * large that the next read would exceed the limit, the header
166 * is generated, and the header & unfiltered buffer are flushed
167 * to the client. Chat then continues in non-buffering,
168 * non-filtering body mode.
170 * Revision 1.44 2001/10/02 18:13:57 oes
173 * Revision 1.43 2001/10/02 15:32:13 oes
174 * Moved generation of hdr
176 * Revision 1.42 2001/09/21 23:02:02 david__schmidt
177 * Cleaning up 2 compiler warnings on OS/2.
179 * Revision 1.41 2001/09/16 17:05:14 jongfoster
180 * Removing unused #include showarg.h
182 * Revision 1.40 2001/09/16 15:41:45 jongfoster
183 * Fixing signed/unsigned comparison warning.
185 * Revision 1.39 2001/09/16 13:21:27 jongfoster
186 * Changes to use new list functions.
188 * Revision 1.38 2001/09/16 13:01:46 jongfoster
189 * Removing redundant function call that zeroed zalloc()'d memory.
191 * Revision 1.37 2001/09/10 11:12:24 oes
192 * Deleted unused variable
194 * Revision 1.36 2001/09/10 10:56:15 oes
195 * Silenced compiler warnings
197 * Revision 1.35 2001/07/31 14:44:22 oes
198 * Deleted unused size parameter from filter_popups()
200 * Revision 1.34 2001/07/30 22:08:36 jongfoster
201 * Tidying up #defines:
202 * - All feature #defines are now of the form FEATURE_xxx
203 * - Permanently turned off WIN_GUI_EDIT
204 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
206 * Revision 1.33 2001/07/29 19:32:00 jongfoster
207 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
209 * Revision 1.32 2001/07/29 18:47:05 jongfoster
210 * Adding missing #include "loadcfg.h"
212 * Revision 1.31 2001/07/29 12:17:48 oes
213 * Applied pthread fix by Paul Lieverse
215 * Revision 1.30 2001/07/25 22:57:13 jongfoster
216 * __BEOS__ no longer overrides FEATURE_PTHREAD.
217 * This is because FEATURE_PTHREAD will soon be widely used, so I
218 * want to keep it simple.
220 * Revision 1.29 2001/07/24 12:47:06 oes
221 * Applied BeOS support update by Eugenia
223 * Revision 1.28 2001/07/23 13:26:12 oes
224 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
226 * Revision 1.27 2001/07/19 19:09:47 haroon
227 * - Added code to take care of the situation where while processing the first
228 * server response (which includes the server header), after finding the end
229 * of the headers we were not looking past the end of the headers for
230 * content modification. I enabled it for filter_popups.
231 * Someone else should look to see if other similar operations should be
232 * done to the discarded portion of the buffer.
234 * Note 2001/07/20: No, the other content modification mechanisms will process
235 * the whole iob later anyway. --oes
237 * Revision 1.26 2001/07/18 12:31:36 oes
240 * Revision 1.25 2001/07/15 19:43:49 jongfoster
241 * Supports POSIX threads.
242 * Also removed some unused #includes.
244 * Revision 1.24 2001/07/13 14:00:40 oes
245 * - Generic content modification scheme:
246 * Each feature has its own applicability flag that is set
247 * from csp->action->flags.
248 * Replaced the "filtering" int flag , by a function pointer
249 * "content_filter" to the function that will do the content
250 * modification. If it is != NULL, the document will be buffered
251 * and processed through *content_filter, which must set
252 * csp->content_length and return a modified copy of the body
253 * or return NULL (on failiure).
254 * - Changed csp->is_text to the more generic bitmap csp->content_type
255 * which can currently take the valued CT_TEXT or CT_GIF
257 * - Removed all #ifdef PCRS
259 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
260 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
261 * the `block_acl' call. This prevents a compilation error when the user
262 * does not wish to use the "ACL" feature.
264 * Revision 1.22 2001/06/29 21:45:41 oes
265 * Indentation, CRLF->LF, Tab-> Space
267 * Revision 1.21 2001/06/29 13:29:36 oes
268 * - Cleaned up, improved comments
269 * - Unified all possible interceptors (CGI,
270 * block, trust, fast_redirect) in one
271 * place, with one (CGI) answer generation
272 * mechansim. Much clearer now.
273 * - Removed the GIF image generation, which
274 * is now done in filters.c:block_url()
275 * - Made error conditions like domain lookup
276 * failiure or (various) problems while talking
277 * to the server use cgi.c:error_response()
278 * instead of generating HTML/HTTP in chat() (yuck!)
279 * - Removed logentry from cancelled commit
281 * Revision 1.20 2001/06/09 10:55:28 jongfoster
282 * Changing BUFSIZ ==> BUFFER_SIZE
284 * Revision 1.19 2001/06/07 23:12:52 jongfoster
285 * Replacing function pointer in struct gateway with a directly
286 * called function forwarded_connect().
287 * Replacing struct gateway with struct forward_spec
289 * Revision 1.18 2001/06/03 19:12:16 oes
290 * introduced new cgi handling
292 * Revision 1.17 2001/06/01 20:07:23 jongfoster
293 * Now uses action +image-blocker{} rather than config->tinygif
295 * Revision 1.16 2001/06/01 18:49:17 jongfoster
296 * Replaced "list_share" with "list" - the tiny memory gain was not
297 * worth the extra complexity.
299 * Revision 1.15 2001/05/31 21:24:47 jongfoster
300 * Changed "permission" to "action" throughout.
301 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
302 * Moved vanilla wafer check into chat(), since we must now
303 * decide whether or not to add it based on the URL.
305 * Revision 1.14 2001/05/29 20:14:01 joergs
306 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
309 * Revision 1.13 2001/05/29 09:50:24 jongfoster
310 * Unified blocklist/imagelist/permissionslist.
311 * File format is still under discussion, but the internal changes
314 * Also modified interceptor behaviour:
315 * - We now intercept all URLs beginning with one of the following
316 * prefixes (and *only* these prefixes):
318 * * http://ijbswa.sf.net/config/
319 * * http://ijbswa.sourceforge.net/config/
320 * - New interceptors "home page" - go to http://i.j.b/ to see it.
321 * - Internal changes so that intercepted and fast redirect pages
322 * are not replaced with an image.
323 * - Interceptors now have the option to send a binary page direct
324 * to the client. (i.e. ijb-send-banner uses this)
325 * - Implemented show-url-info interceptor. (Which is why I needed
326 * the above interceptors changes - a typical URL is
327 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
328 * The previous mechanism would not have intercepted that, and
329 * if it had been intercepted then it then it would have replaced
332 * Revision 1.12 2001/05/27 22:17:04 oes
334 * - re_process_buffer no longer writes the modified buffer
335 * to the client, which was very ugly. It now returns the
336 * buffer, which it is then written by chat.
338 * - content_length now adjusts the Content-Length: header
339 * for modified documents rather than crunch()ing it.
340 * (Length info in csp->content_length, which is 0 for
341 * unmodified documents)
343 * - For this to work, sed() is called twice when filtering.
345 * Revision 1.11 2001/05/26 17:27:53 jongfoster
346 * Added support for CLF and fixed LOG_LEVEL_LOG.
347 * Also did CRLF->LF fix of my previous patch.
349 * Revision 1.10 2001/05/26 15:26:15 jongfoster
350 * ACL feature now provides more security by immediately dropping
351 * connections from untrusted hosts.
353 * Revision 1.9 2001/05/26 00:28:36 jongfoster
354 * Automatic reloading of config file.
355 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
356 * Most of the global variables have been moved to a new
357 * struct configuration_spec, accessed through csp->config->globalname
358 * Most of the globals remaining are used by the Win32 GUI.
360 * Revision 1.8 2001/05/25 22:43:18 jongfoster
361 * Fixing minor memory leak and buffer overflow.
363 * Revision 1.7 2001/05/25 22:34:30 jongfoster
366 * Revision 1.6 2001/05/23 00:13:58 joergs
367 * AmigaOS support fixed.
369 * Revision 1.5 2001/05/22 18:46:04 oes
371 * - Enabled filtering banners by size rather than URL
372 * by adding patterns that replace all standard banner
373 * sizes with the "Junkbuster" gif to the re_filterfile
375 * - Enabled filtering WebBugs by providing a pattern
376 * which kills all 1x1 images
378 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
379 * which is selected by the (nonstandard and therefore
380 * capital) letter 'U' in the option string.
381 * It causes the quantifiers to be ungreedy by default.
382 * Appending a ? turns back to greedy (!).
384 * - Added a new interceptor ijb-send-banner, which
385 * sends back the "Junkbuster" gif. Without imagelist or
386 * MSIE detection support, or if tinygif = 1, or the
387 * URL isn't recognized as an imageurl, a lame HTML
388 * explanation is sent instead.
390 * - Added new feature, which permits blocking remote
391 * script redirects and firing back a local redirect
393 * The feature is conditionally compiled, i.e. it
394 * can be disabled with --disable-fast-redirects,
395 * plus it must be activated by a "fast-redirects"
396 * line in the config file, has its own log level
397 * and of course wants to be displayed by show-proxy-args
398 * Note: Boy, all the #ifdefs in 1001 locations and
399 * all the fumbling with configure.in and acconfig.h
400 * were *way* more work than the feature itself :-(
402 * - Because a generic redirect template was needed for
403 * this, tinygif = 3 now uses the same.
405 * - Moved GIFs, and other static HTTP response templates
410 * - Removed some >400 CRs again (Jon, you really worked
413 * Revision 1.4 2001/05/21 19:34:01 jongfoster
414 * Made failure to bind() a fatal error.
416 * Revision 1.3 2001/05/20 01:21:20 jongfoster
417 * Version 2.9.4 checkin.
418 * - Merged popupfile and cookiefile, and added control over PCRS
419 * filtering, in new "permissionsfile".
420 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
421 * file error you now get a message box (in the Win32 GUI) rather
422 * than the program exiting with no explanation.
423 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
425 * - Removed tabs from "config"
426 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
427 * - Bumped up version number.
429 * Revision 1.2 2001/05/17 22:34:44 oes
430 * - Added hint on GIF char array generation to jcc.c
431 * - Cleaned CRLF's from the sources and related files
432 * - Repaired logging for REF and FRC
434 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
435 * Initial import of version 2.9.3 source tree
438 *********************************************************************/
444 #include <sys/types.h>
451 #ifdef FEATURE_PTHREAD
453 #endif /* def FEATURE_PTHREAD */
456 # ifndef FEATURE_PTHREAD
457 # include <windows.h>
458 # include <process.h>
459 # endif /* ndef FEATURE_PTHREAD */
462 # ifndef _WIN_CONSOLE
464 # endif /* ndef _WIN_CONSOLE */
466 #else /* ifndef _WIN32 */
468 # if !defined (__OS2__)
470 # include <sys/wait.h>
471 # endif /* ndef __OS2__ */
472 # include <sys/time.h>
473 # include <sys/stat.h>
474 # include <sys/ioctl.h>
477 #include <sys/termios.h>
487 # include <socket.h> /* BeOS has select() for sockets only. */
488 # include <OS.h> /* declarations for threads and stuff. */
491 # if defined(__EMX__) || defined(__OS2__)
492 # include <sys/select.h> /* OS/2/EMX needs a little help with select */
497 #define bzero(B,N) memset(B,0x00,n)
512 #include "killpopup.h"
513 #include "miscutil.h"
515 #include "jbsockets.h"
520 #include "urlmatch.h"
522 const char jcc_h_rcs[] = JCC_H_VERSION;
523 const char project_h_rcs[] = PROJECT_H_VERSION;
526 struct client_state clients[1];
527 struct file_list files[1];
529 #ifdef FEATURE_STATISTICS
530 int urls_read = 0; /* total nr of urls read inc rejected */
531 int urls_rejected = 0; /* total nr of urls rejected */
532 #endif /* def FEATURE_STATISTICS */
535 static void listen_loop(void);
536 static void chat(struct client_state *csp);
538 void serve(struct client_state *csp);
539 #else /* ifndef AMIGA */
540 static void serve(struct client_state *csp);
541 #endif /* def AMIGA */
544 static int32 server_thread(void *data);
545 #endif /* def __BEOS__ */
548 #define sleep(N) Sleep(((N) * 1000))
552 #define sleep(N) DosSleep(((N) * 100))
557 const char *pidfile = NULL;
558 int received_hup_signal = 0;
559 #endif /* defined unix */
561 /* The vanilla wafer. */
562 static const char VANILLA_WAFER[] =
563 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
564 "Do_not_send_me_any_copyrighted_information_other_than_the_"
565 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
566 "In_particular_do_not_send_me_any_cookies_that_"
567 "are_subject_to_a_claim_of_copyright_by_anybody._"
568 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
569 "(copyright_or_otherwise)_applying_to_any_cookie._";
572 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
573 /*********************************************************************
575 * Function : sig_handler
577 * Description : Signal handler for different signals.
578 * Exit gracefully on ABRT, TERM and INT
579 * or set a flag that will cause the errlog
580 * to be reopened by the main thread on HUP.
583 * 1 : the_signal - the signal cause this function to call
587 *********************************************************************/
588 static void sig_handler(int the_signal)
595 log_error(LOG_LEVEL_INFO, "exiting by signal %d .. bye", the_signal);
603 received_hup_signal = 1;
608 * We shouldn't be here, unless we catch signals
609 * in main() that we can't handle here!
611 log_error(LOG_LEVEL_FATAL, "sig_handler: exiting on unexpected signal %d", the_signal);
619 /*********************************************************************
623 * Description : Once a connection to the client has been accepted,
624 * this function is called (via serve()) to handle the
625 * main business of the communication. When this
626 * function returns, the caller must close the client
630 * 1 : csp = Current client state (buffers, headers, etc...)
632 * Returns : On success, the number of bytes written are returned (zero
633 * indicates nothing was written). On error, -1 is returned,
634 * and errno is set appropriately. If count is zero and the
635 * file descriptor refers to a regular file, 0 will be
636 * returned without causing any other effect. For a special
637 * file, the results are not portable.
639 *********************************************************************/
640 static void chat(struct client_state *csp)
643 * This next lines are a little ugly, but they simplifies the if statements
644 * below. Basically if TOGGLE, then we want the if to test if the
645 * CSP_FLAG_TOGGLED_ON flag ist set, else we don't. And if FEATURE_FORCE_LOAD,
646 * then we want the if to test for CSP_FLAG_FORCED , else we don't
648 #ifdef FEATURE_TOGGLE
649 # define IS_TOGGLED_ON_AND (csp->flags & CSP_FLAG_TOGGLED_ON) &&
650 #else /* ifndef FEATURE_TOGGLE */
651 # define IS_TOGGLED_ON_AND
652 #endif /* ndef FEATURE_TOGGLE */
653 #ifdef FEATURE_FORCE_LOAD
654 # define IS_NOT_FORCED_AND !(csp->flags & CSP_FLAG_FORCED) &&
655 #else /* ifndef FEATURE_FORCE_LOAD */
656 # define IS_NOT_FORCED_AND
657 #endif /* def FEATURE_FORCE_LOAD */
659 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
661 char buf[BUFFER_SIZE];
664 int n, maxfd, server_body;
665 int ms_iis5_hack = 0;
667 const struct forward_spec * fwd;
668 struct http_request *http;
669 #ifdef FEATURE_KILL_POPUPS
670 int block_popups; /* bool, 1==will block popups */
671 int block_popups_now = 0; /* bool, 1==currently blocking popups */
672 #endif /* def FEATURE_KILL_POPUPS */
674 int pcrs_filter; /* bool, 1==will filter through pcrs */
675 int gif_deanimate; /* bool, 1==will deanimate gifs */
677 /* Function that does the content filtering for the current request */
678 char *(*content_filter)() = NULL;
680 /* Skeleton for HTTP response, if we should intercept the request */
681 struct http_response *rsp;
686 * Read the client's request. Note that since we're not using select() we
687 * could get blocked here if a client connected, then didn't say anything!
692 n = read_socket(csp->cfd, buf, sizeof(buf));
694 if (n <= 0) break; /* error! */
696 add_to_iob(csp, buf, n);
698 req = get_header(csp);
702 break; /* no HTTP request! */
707 continue; /* more to come! */
710 #ifdef FEATURE_FORCE_LOAD
711 /* If this request contains the FORCE_PREFIX,
712 * better get rid of it now and set the force flag --oes
715 if (strstr(req, FORCE_PREFIX))
717 strclean(req, FORCE_PREFIX);
718 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
719 csp->flags |= CSP_FLAG_FORCED;
722 #endif /* def FEATURE_FORCE_LOAD */
724 parse_http_request(req, http, csp);
729 if (http->cmd == NULL)
731 strcpy(buf, CHEADER);
732 write_socket(csp->cfd, buf, strlen(buf));
734 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
739 /* decide how to route the HTTP request */
741 if ((fwd = forward_url(http, csp)) == NULL)
743 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
744 /* Never get here - LOG_LEVEL_FATAL causes program exit */
747 /* build the http request to send to the server
748 * we have to do one of the following:
750 * create = use the original HTTP request to create a new
751 * HTTP request that has either the path component
752 * without the http://domainspec (w/path) or the
753 * full orininal URL (w/url)
754 * Note that the path and/or the HTTP version may
755 * have been altered by now.
757 * connect = Open a socket to the host:port of the server
758 * and short-circuit server and client socket.
760 * pass = Pass the request unchanged if forwarding a CONNECT
761 * request to a parent proxy. Note that we'll be sending
762 * the CFAIL message ourselves if connecting to the parent
763 * fails, but we won't send a CSUCCEED message if it works,
764 * since that would result in a double message (ours and the
765 * parent's). After sending the request to the parent, we simply
771 * +--------+--------+
773 * 0 | create | connect|
775 * Forwarding +--------+--------+
777 * 1 | create | pass |
779 * +--------+--------+
784 * Determine the actions for this URL
786 #ifdef FEATURE_TOGGLE
787 if (!(csp->flags & CSP_FLAG_TOGGLED_ON))
789 /* Most compatible set of actions (i.e. none) */
790 init_current_action(csp->action);
793 #endif /* ndef FEATURE_TOGGLE */
795 url_actions(http, csp);
800 * Check if a CONNECT request is allowable:
801 * In the absence of a +limit-connect action, allow only port 443.
802 * If there is an action, allow whatever matches the specificaton.
806 if( ( !(csp->action->flags & ACTION_LIMIT_CONNECT) && csp->http->port != 443)
807 || (csp->action->flags & ACTION_LIMIT_CONNECT
808 && !match_portlist(csp->action->string[ACTION_STRING_LIMIT_CONNECT], csp->http->port)) )
810 strcpy(buf, CFORBIDDEN);
811 write_socket(csp->cfd, buf, strlen(buf));
813 log_error(LOG_LEVEL_CONNECT, "Denying suspicious CONNECT request from %s", csp->ip_addr_str);
814 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 403 0", csp->ip_addr_str);
822 * Downgrade http version from 1.1 to 1.0 if +downgrade
825 if ( (http->ssl == 0)
826 && (!strcmpic(http->ver, "HTTP/1.1"))
827 && (csp->action->flags & ACTION_DOWNGRADE))
830 http->ver = strdup("HTTP/1.0");
832 if (http->ver == NULL)
834 log_error(LOG_LEVEL_FATAL, "Out of memory downgrading HTTP version");
839 * Save a copy of the original request for logging
841 http->ocmd = strdup(http->cmd);
843 if (http->ocmd == NULL)
845 log_error(LOG_LEVEL_FATAL, "Out of memory copying HTTP request line");
849 * (Re)build the HTTP request for non-SSL requests.
850 * If forwarding, use the whole URL, else, use only the path.
856 http->cmd = strdup(http->gpc);
857 string_append(&http->cmd, " ");
859 if (fwd->forward_host)
861 string_append(&http->cmd, http->url);
865 string_append(&http->cmd, http->path);
868 string_append(&http->cmd, " ");
869 string_append(&http->cmd, http->ver);
871 if (http->cmd == NULL)
873 log_error(LOG_LEVEL_FATAL, "Out of memory rewiting SSL command");
876 enlist(csp->headers, http->cmd);
879 #ifdef FEATURE_COOKIE_JAR
881 * If we're logging cookies in a cookie jar, and the user has not
882 * supplied any wafers, and the user has not told us to suppress the
883 * vanilla wafer, then send the vanilla wafer.
885 if ((csp->config->jarfile != NULL)
886 && list_is_empty(csp->action->multi[ACTION_MULTI_WAFER])
887 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
889 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
891 #endif /* def FEATURE_COOKIE_JAR */
894 #ifdef FEATURE_KILL_POPUPS
895 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
896 #endif /* def FEATURE_KILL_POPUPS */
898 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
899 ((csp->action->flags & ACTION_FILTER) != 0);
901 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
903 /* grab the rest of the client's headers */
907 if ( ( p = get_header(csp) ) && ( *p == '\0' ) )
909 n = read_socket(csp->cfd, buf, sizeof(buf));
912 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
915 add_to_iob(csp, buf, n);
919 if (p == NULL) break;
921 enlist(csp->headers, p);
925 * We have a request. Now, check to see if we need to
926 * intercept it, i.e. If ..
930 /* a CGI call was detected and answered */
931 (NULL != (rsp = dispatch_cgi(csp)))
933 /* or we are enabled and... */
936 /* ..the request was blocked */
937 ( NULL != (rsp = block_url(csp)))
941 || ( NULL != (rsp = trust_url(csp)))
942 #endif /* def FEATURE_TRUST */
944 /* ..or a fast redirect kicked in */
945 #ifdef FEATURE_FAST_REDIRECTS
946 || (((csp->action->flags & ACTION_FAST_REDIRECTS) != 0) &&
947 (NULL != (rsp = redirect_url(csp))))
948 #endif /* def FEATURE_FAST_REDIRECTS */
952 /* Write the answer to the client */
953 if ((write_socket(csp->cfd, rsp->head, rsp->head_length) != rsp->head_length)
954 || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length))
956 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
959 #ifdef FEATURE_STATISTICS
960 /* Count as a rejected request */
961 csp->flags |= CSP_FLAG_REJECTED;
962 #endif /* def FEATURE_STATISTICS */
964 /* Log (FIXME: All intercept reasons apprear as "crunch" with Status 200) */
965 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
966 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->ocmd);
968 /* Clean up and return */
969 free_http_response(rsp);
973 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
975 if (fwd->forward_host)
977 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
978 fwd->forward_host, fwd->forward_port, http->hostport);
982 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
985 /* here we connect to the server, gateway, or the forwarder */
987 csp->sfd = forwarded_connect(fwd, http, csp);
991 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
996 rsp = error_response(csp, "no-such-domain", errno);
998 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
999 csp->ip_addr_str, http->ocmd);
1003 rsp = error_response(csp, "connect-failed", errno);
1005 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1006 csp->ip_addr_str, http->ocmd);
1010 /* Write the answer to the client */
1013 if ((write_socket(csp->cfd, rsp->head, rsp->head_length) != rsp->head_length)
1014 || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length))
1016 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1020 free_http_response(rsp);
1024 log_error(LOG_LEVEL_CONNECT, "OK");
1026 hdr = sed(client_patterns, add_client_headers, csp);
1029 /* FIXME Should handle error properly */
1030 log_error(LOG_LEVEL_FATAL, "Out of memory parsing client header");
1033 list_remove_all(csp->headers);
1035 if (fwd->forward_host || (http->ssl == 0))
1037 /* write the client's (modified) header to the server
1038 * (along with anything else that may be in the buffer)
1043 if ((write_socket(csp->sfd, hdr, n) != n)
1044 || (flush_socket(csp->sfd, csp ) < 0))
1046 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
1049 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1050 csp->ip_addr_str, http->ocmd);
1052 rsp = error_response(csp, "connect-failed", errno);
1056 if ((write_socket(csp->cfd, rsp->head, rsp->head_length) != rsp->head_length)
1057 || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length))
1059 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1063 free_http_response(rsp);
1071 * We're running an SSL tunnel and we're not forwarding,
1072 * so just send the "connect succeeded" message to the
1073 * client, flush the rest, and get out of the way.
1075 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
1076 csp->ip_addr_str, http->ocmd);
1078 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1) < 0)
1086 /* we're finished with the client's header */
1089 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
1091 /* pass data between the client and server
1092 * until one or the other shuts down the connection.
1101 FD_SET(csp->cfd, &rfds);
1102 FD_SET(csp->sfd, &rfds);
1104 n = select(maxfd+1, &rfds, NULL, NULL, NULL);
1108 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
1112 /* this is the body of the browser's request
1113 * just read it and write it.
1116 if (FD_ISSET(csp->cfd, &rfds))
1118 n = read_socket(csp->cfd, buf, sizeof(buf));
1122 break; /* "game over, man" */
1125 if (write_socket(csp->sfd, buf, n) != n)
1127 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1134 * The server wants to talk. It could be the header or the body.
1135 * If `hdr' is null, then it's the header otherwise it's the body.
1136 * FIXME: Does `hdr' really mean `host'? No.
1140 if (FD_ISSET(csp->sfd, &rfds))
1143 n = read_socket(csp->sfd, buf, sizeof(buf) - 1);
1147 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
1149 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
1150 csp->ip_addr_str, http->ocmd);
1152 rsp = error_response(csp, "connect-failed", errno);
1156 if ((write_socket(csp->cfd, rsp->head, rsp->head_length) != rsp->head_length)
1157 || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length))
1159 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
1163 free_http_response(rsp);
1167 /* Add a trailing zero. This lets filter_popups
1168 * use string operations.
1172 #ifdef FEATURE_KILL_POPUPS
1173 /* Filter the popups on this read. */
1174 if (block_popups_now)
1176 filter_popups(buf, csp);
1178 #endif /* def FEATURE_KILL_POPUPS */
1180 /* Normally, this would indicate that we've read
1181 * as much as the server has sent us and we can
1182 * close the client connection. However, Microsoft
1183 * in its wisdom has released IIS/5 with a bug that
1184 * prevents it from sending the trailing \r\n in
1185 * a 302 redirect header (and possibly other headers).
1186 * To work around this if we've haven't parsed
1187 * a full header we'll append a trailing \r\n
1188 * and see if this now generates a valid one.
1190 * This hack shouldn't have any impacts. If we've
1191 * already transmitted the header or if this is a
1192 * SSL connection, then we won't bother with this
1193 * hack. So we only work on partially received
1194 * headers. If we append a \r\n and this still
1195 * doesn't generate a valid header, then we won't
1196 * transmit anything to the client.
1201 if (server_body || http->ssl)
1204 * If we have been buffering up the document,
1205 * now is the time to apply content modification
1206 * and send the result to the client.
1211 * If the content filter fails, use the original
1212 * buffer and length.
1213 * (see p != NULL ? p : csp->iob->cur below)
1215 if (NULL == (p = (*content_filter)(csp)))
1217 csp->content_length = csp->iob->eod - csp->iob->cur;
1220 hdr = sed(server_patterns, add_server_headers, csp);
1223 /* FIXME Should handle error properly */
1224 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1229 if ((write_socket(csp->cfd, hdr, n) != n)
1230 || (write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length) != (int)csp->content_length))
1232 log_error(LOG_LEVEL_ERROR, "write modified content to client failed: %E");
1242 break; /* "game over, man" */
1246 * This is NOT the body, so
1247 * Let's pretend the server just sent us a blank line.
1249 n = sprintf(buf, "\r\n");
1252 * Now, let the normal header parsing algorithm below do its
1253 * job. If it fails, we'll exit instead of continuing.
1260 * If this is an SSL connection or we're in the body
1261 * of the server document, just write it to the client,
1262 * unless we need to buffer the body for later content-filtering
1265 if (server_body || http->ssl)
1269 add_to_iob(csp, buf, n);
1272 * If the buffer limit will be reached on the next read,
1273 * switch to non-filtering mode, i.e. make & write the
1274 * header, flush the socket and get out of the way.
1276 if (((size_t)(csp->iob->eod - csp->iob->buf)) + (size_t)BUFFER_SIZE > csp->config->buffer_limit)
1278 log_error(LOG_LEVEL_ERROR, "Buffer size limit reached! Flushing and stepping back.");
1280 hdr = sed(server_patterns, add_server_headers, csp);
1283 /* FIXME Should handle error properly */
1284 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1290 if (((write_socket(csp->cfd, hdr, n) != n)
1291 || (n = flush_socket(csp->cfd, csp) < 0)))
1293 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1302 content_filter = NULL;
1309 if (write_socket(csp->cfd, buf, n) != n)
1311 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
1320 /* we're still looking for the end of the
1321 * server's header ... (does that make header
1322 * parsing an "out of body experience" ?
1325 /* buffer up the data we just read */
1326 add_to_iob(csp, buf, n);
1328 /* get header lines from the iob */
1330 while ((p = get_header(csp)))
1334 /* see following note */
1337 enlist(csp->headers, p);
1341 /* NOTE: there are no "empty" headers so
1342 * if the pointer `p' is not NULL we must
1343 * assume that we reached the end of the
1344 * buffer before we hit the end of the header.
1351 /* Well, we tried our MS IIS/5
1352 * hack and it didn't work.
1353 * The header is incomplete
1354 * and there isn't anything
1355 * we can do about it.
1361 /* Since we have to wait for
1362 * more from the server before
1363 * we can parse the headers
1364 * we just continue here.
1370 /* we have now received the entire header.
1371 * filter it and send the result to the client
1374 hdr = sed(server_patterns, add_server_headers, csp);
1377 /* FIXME Should handle error properly */
1378 log_error(LOG_LEVEL_FATAL, "Out of memory parsing server header");
1383 /* write the server's (modified) header to
1384 * the client (along with anything else that
1385 * may be in the buffer)
1388 #ifdef FEATURE_KILL_POPUPS
1389 /* Start blocking popups if appropriate. */
1391 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1392 !http->ssl && /* We talk plaintext */
1393 block_popups) /* Policy allows */
1395 block_popups_now = 1;
1397 * Filter the part of the body that came in the same read
1398 * as the last headers:
1400 filter_popups(csp->iob->cur, csp);
1403 #endif /* def FEATURE_KILL_POPUPS */
1405 /* Buffer and pcrs filter this if appropriate. */
1407 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1408 !http->ssl && /* We talk plaintext */
1409 pcrs_filter) /* Policy allows */
1411 content_filter = pcrs_filter_response;
1414 /* Buffer and gif_deanimate this if appropriate. */
1416 if ((csp->content_type & CT_GIF) && /* It's a image/gif MIME-Type */
1417 !http->ssl && /* We talk plaintext */
1418 gif_deanimate) /* Policy allows */
1420 content_filter = gif_deanimate_response;
1425 * Only write if we're not buffering for content modification
1427 if (!content_filter && ((write_socket(csp->cfd, hdr, n) != n)
1428 || (n = flush_socket(csp->cfd, csp) < 0)))
1430 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1432 /* the write failed, so don't bother
1433 * mentioning it to the client...
1434 * it probably can't hear us anyway.
1440 if(!content_filter) byte_count += n;
1442 /* we're finished with the server's header */
1447 /* If this was a MS IIS/5 hack then it means
1448 * the server has already closed the
1449 * connection. Nothing more to read. Time
1460 return; /* huh? we should never get here */
1463 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
1464 csp->ip_addr_str, http->ocmd, byte_count);
1468 /*********************************************************************
1472 * Description : This is little more than chat. We only "serve" to
1473 * to close any socket that chat may have opened.
1476 * 1 : csp = Current client state (buffers, headers, etc...)
1480 *********************************************************************/
1482 void serve(struct client_state *csp)
1483 #else /* ifndef AMIGA */
1484 static void serve(struct client_state *csp)
1485 #endif /* def AMIGA */
1488 close_socket(csp->cfd);
1492 close_socket(csp->sfd);
1495 csp->flags &= ~CSP_FLAG_ACTIVE;
1501 /*********************************************************************
1503 * Function : server_thread
1505 * Description : We only exist to call `serve' in a threaded environment.
1508 * 1 : data = Current client state (buffers, headers, etc...)
1510 * Returns : Always 0.
1512 *********************************************************************/
1513 static int32 server_thread(void *data)
1515 serve((struct client_state *) data);
1522 /*********************************************************************
1526 * Description : Print usage info & exit.
1528 * Parameters : Pointer to argv[0] for identifying ourselves
1532 *********************************************************************/
1533 void usage(const char *myname)
1535 printf("JunkBuster proxy version " VERSION " (" HOME_PAGE_URL ")\n"
1536 "Usage: %s [--help] [--version] [--no-daemon] [--pidfile pidfile] [--user user] [configfile]\n"
1537 "Aborting.\n", myname);
1544 /*********************************************************************
1548 * Description : Load the config file and start the listen loop.
1549 * This function is a lot more *sane* with the `load_config'
1550 * and `listen_loop' functions; although it stills does
1551 * a *little* too much for my taste.
1554 * 1 : argc = Number of parameters (including $0).
1555 * 2 : argv = Array of (char *)'s to the parameters.
1557 * Returns : 1 if : can't open config file, unrecognized directive,
1558 * stats requested in multi-thread mode, can't open the
1559 * log file, can't open the jar file, listen port is invalid,
1560 * any load fails, and can't bind port.
1562 * Else main never returns, the process must be signaled
1563 * to terminate execution. Or, on Windows, use the
1564 * "File", "Exit" menu option.
1566 *********************************************************************/
1568 int real_main(int argc, const char *argv[])
1570 int main(int argc, const char *argv[])
1582 #if !defined(_WIN32)
1590 * Parse the command line arguments
1592 while (++argc_pos < argc)
1594 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1596 if (strcmp(argv[argc_pos], "--help") == 0)
1601 else if(strcmp(argv[argc_pos], "--version") == 0)
1603 printf("Junkbuster version " VERSION " (" HOME_PAGE_URL ")\n");
1607 else if (strcmp(argv[argc_pos], "--no-daemon" ) == 0)
1612 else if (strcmp(argv[argc_pos], "--pidfile" ) == 0)
1614 if (++argc_pos == argc) usage(argv[0]);
1615 pidfile = strdup(argv[argc_pos]);
1618 else if (strcmp(argv[argc_pos], "--user" ) == 0)
1620 if (++argc_pos == argc) usage(argv[0]);
1621 pw = getpwnam(argv[argc_pos]);
1625 log_error(LOG_LEVEL_FATAL, "User %s not found.", argv[argc_pos]);
1628 #endif /* defined(unix) */
1630 #endif /* defined(_WIN32) && !defined(_WIN_CONSOLE) */
1632 configfile = argv[argc_pos];
1635 } /* -END- while (more arguments) */
1638 if ( *configfile != '/' )
1642 /* make config-filename absolute here */
1643 if ( !(basedir = getcwd( NULL, 1024 )))
1645 perror("get working dir failed");
1649 if ( !(abs_file = malloc( strlen( basedir ) + strlen( configfile ) + 5 )))
1651 perror("malloc failed");
1654 strcpy( abs_file, basedir );
1655 strcat( abs_file, "/" );
1656 strcat( abs_file, configfile );
1657 configfile = abs_file;
1659 #endif /* defined unix */
1666 #elif defined(_WIN32)
1671 * Unix signal handling
1673 * Catch the abort, interrupt and terminate signals for a graceful exit
1674 * Catch the hangup signal so the errlog can be reopened.
1675 * Ignore the broken pipe and child signals
1676 * FIXME: Isn't ignoring the default for SIGCHLD anyway and why ignore SIGPIPE?
1678 #if !defined(_WIN32) && !defined(__OS2__) && !defined(AMIGA)
1681 const int catched_signals[] = { SIGABRT, SIGTERM, SIGINT, SIGHUP, 0 };
1682 const int ignored_signals[] = { SIGPIPE, SIGCHLD, 0 };
1684 for (idx = 0; catched_signals[idx] != 0; idx++)
1686 if (signal(catched_signals[idx], sig_handler) == SIG_ERR)
1688 log_error(LOG_LEVEL_FATAL, "Can't set signal-handler for signal %d: %E", catched_signals[idx]);
1692 for (idx = 0; ignored_signals[idx] != 0; idx++)
1694 if (signal(ignored_signals[idx], SIG_IGN) == SIG_ERR)
1696 log_error(LOG_LEVEL_FATAL, "Can't set ignore-handler for signal %d: %E", ignored_signals[idx]);
1701 #else /* ifdef _WIN32 */
1702 # ifdef _WIN_CONSOLE
1704 * We *are* in a windows console app.
1705 * Print a verbose messages about FAQ's and such
1707 printf(win32_blurb);
1708 # endif /* def _WIN_CONSOLE */
1709 #endif /* def _WIN32 */
1712 /* Initialize the CGI subsystem */
1713 cgi_init_error_messages();
1716 * If runnig on unix and without the --nodaemon
1717 * option, become a daemon. I.e. fork, detach
1718 * from tty and get process group leadership
1731 if ( pid < 0 ) /* error */
1736 else if ( pid != 0 ) /* parent */
1741 * must check for errors
1742 * child died due to missing files aso
1745 wpid = waitpid( pid, &status, WNOHANG );
1754 /* Should be more portable, but not as well tested */
1759 #else /* ndef __FreeBSD__ */
1761 #endif /* ndef __FreeBSD__ */
1762 fd = open("/dev/tty", O_RDONLY);
1765 /* no error check here */
1766 ioctl( fd, TIOCNOTTY,0 );
1770 /* FIXME: should close stderr (fd 2) here too, but the test
1772 * and load config file is done in listen_loop() and puts
1773 * some messages on stderr there.
1780 } /* -END- if (!no_daemon) */
1783 * As soon as we have written the PID file, we can switch
1784 * to the user ID indicated by the --user option
1788 if (setuid(pw->pw_uid))
1790 log_error(LOG_LEVEL_FATAL, "Cannot setuid(): Insufficient permissions.");
1794 #endif /* defined unix */
1804 /*********************************************************************
1806 * Function : bind_port_helper
1808 * Description : Bind the listen port. Handles logging, and aborts
1812 * 1 : config = Junkbuster configuration. Specifies port
1815 * Returns : Port that was opened.
1817 *********************************************************************/
1818 static int bind_port_helper(struct configuration_spec * config)
1822 if ( (config->haddr != NULL)
1823 && (config->haddr[0] == '1')
1824 && (config->haddr[1] == '2')
1825 && (config->haddr[2] == '7')
1826 && (config->haddr[3] == '.') )
1828 log_error(LOG_LEVEL_INFO, "Listening on port %d for local connections only",
1831 else if (config->haddr == NULL)
1833 log_error(LOG_LEVEL_INFO, "Listening on port %d on all IP addresses",
1838 log_error(LOG_LEVEL_INFO, "Listening on port %d on IP address %s",
1839 config->hport, config->haddr);
1842 bfd = bind_port(config->haddr, config->hport);
1846 log_error(LOG_LEVEL_FATAL, "can't bind %s:%d: %E "
1847 "- There may be another junkbuster or some other "
1848 "proxy running on port %d",
1849 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
1850 config->hport, config->hport
1852 /* shouldn't get here */
1856 config->need_bind = 0;
1862 /*********************************************************************
1864 * Function : listen_loop
1866 * Description : bind the listen port and enter a "FOREVER" listening loop.
1872 *********************************************************************/
1873 static void listen_loop(void)
1875 struct client_state *csp = NULL;
1877 struct configuration_spec * config;
1879 config = load_config();
1881 bfd = bind_port_helper(config);
1885 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) && !defined(__OS2__)
1886 while (waitpid(-1, NULL, WNOHANG) > 0)
1888 /* zombie children */
1890 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
1893 * Free data that was used by died threads
1899 * Re-open the errlog after HUP signal
1901 if (received_hup_signal)
1903 init_error_log(Argv[0], config->logfile, config->debug);
1904 received_hup_signal = 0;
1908 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
1910 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
1914 csp->flags |= CSP_FLAG_ACTIVE;
1917 csp->config = config = load_config();
1919 if ( config->need_bind )
1922 * Since we were listening to the "old port", we will not see
1923 * a "listen" param change until the next IJB request. So, at
1924 * least 1 more request must be made for us to find the new
1925 * setting. I am simply closing the old socket and binding the
1928 * Which-ever is correct, we will serve 1 more page via the
1929 * old settings. This should probably be a "show-proxy-args"
1930 * request. This should not be a so common of an operation
1931 * that this will hurt people's feelings.
1936 bfd = bind_port_helper(config);
1939 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
1941 if (!accept_connection(csp, bfd))
1943 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
1956 log_error(LOG_LEVEL_CONNECT, "OK");
1959 #ifdef FEATURE_TOGGLE
1962 csp->flags |= CSP_FLAG_TOGGLED_ON;
1964 #endif /* def FEATURE_TOGGLE */
1966 if (run_loader(csp))
1968 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
1969 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1973 if (block_acl(NULL,csp))
1975 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
1976 close_socket(csp->cfd);
1980 #endif /* def FEATURE_ACL */
1982 /* add it to the list of clients */
1983 csp->next = clients->next;
1984 clients->next = csp;
1986 if (config->multi_threaded)
1990 /* this is a switch () statment in the C preprocessor - ugh */
1991 #undef SELECTED_ONE_OPTION
1993 /* Use Pthreads in preference to native code */
1994 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
1995 #define SELECTED_ONE_OPTION
1997 pthread_t the_thread;
1998 pthread_attr_t attrs;
2000 pthread_attr_init(&attrs);
2001 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
2002 child_id = (pthread_create(&the_thread, &attrs,
2003 (void*)serve, csp) ? -1 : 0);
2004 pthread_attr_destroy(&attrs);
2008 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
2009 #define SELECTED_ONE_OPTION
2010 child_id = _beginthread(
2016 #if defined(__OS2__) && !defined(SELECTED_ONE_OPTION)
2017 #define SELECTED_ONE_OPTION
2018 child_id = _beginthread(
2025 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
2026 #define SELECTED_ONE_OPTION
2028 thread_id tid = spawn_thread
2029 (server_thread, "server", B_NORMAL_PRIORITY, csp);
2031 if ((tid >= 0) && (resume_thread(tid) == B_OK))
2033 child_id = (int) tid;
2042 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
2043 #define SELECTED_ONE_OPTION
2044 csp->cfd = ReleaseSocket(csp->cfd, -1);
2045 if((child_id = (int)CreateNewProcTags(
2046 NP_Entry, (ULONG)server_thread,
2047 NP_Output, Output(),
2048 NP_CloseOutput, FALSE,
2049 NP_Name, (ULONG)"junkbuster child",
2050 NP_StackSize, 200*1024,
2054 ((struct Task *)child_id)->tc_UserData = csp;
2055 Signal((struct Task *)child_id, SIGF_SINGLE);
2060 #if !defined(SELECTED_ONE_OPTION)
2063 /* This block is only needed when using fork().
2064 * When using threads, the server thread was
2065 * created and run by the call to _beginthread().
2067 if (child_id == 0) /* child */
2073 else if (child_id > 0) /* parent */
2075 /* in a fork()'d environment, the parent's
2076 * copy of the client socket and the CSP
2080 #if !defined(_WIN32) && defined(__CYGWIN__)
2082 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
2083 close_socket(csp->cfd);
2084 csp->flags &= ~CSP_FLAG_ACTIVE;
2088 #undef SELECTED_ONE_OPTION
2089 /* end of cpp switch () */
2091 if (child_id < 0) /* failed */
2093 char buf[BUFFER_SIZE];
2095 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
2097 sprintf(buf , "JunkBuster: can't fork: errno = %d", errno);
2099 write_socket(csp->cfd, buf, strlen(buf));
2100 close_socket(csp->cfd);
2101 csp->flags &= ~CSP_FLAG_ACTIVE;