1 const char jcc_rcs[] = "$Id: jcc.c,v 1.34 2001/07/30 22:08:36 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 1.34 2001/07/30 22:08:36 jongfoster
37 * Tidying up #defines:
38 * - All feature #defines are now of the form FEATURE_xxx
39 * - Permanently turned off WIN_GUI_EDIT
40 * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
42 * Revision 1.33 2001/07/29 19:32:00 jongfoster
43 * Renaming _main() [mingw32 only] to real_main(), for ANSI compliance.
45 * Revision 1.32 2001/07/29 18:47:05 jongfoster
46 * Adding missing #include "loadcfg.h"
48 * Revision 1.31 2001/07/29 12:17:48 oes
49 * Applied pthread fix by Paul Lieverse
51 * Revision 1.30 2001/07/25 22:57:13 jongfoster
52 * __BEOS__ no longer overrides FEATURE_PTHREAD.
53 * This is because FEATURE_PTHREAD will soon be widely used, so I
54 * want to keep it simple.
56 * Revision 1.29 2001/07/24 12:47:06 oes
57 * Applied BeOS support update by Eugenia
59 * Revision 1.28 2001/07/23 13:26:12 oes
60 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
62 * Revision 1.27 2001/07/19 19:09:47 haroon
63 * - Added code to take care of the situation where while processing the first
64 * server response (which includes the server header), after finding the end
65 * of the headers we were not looking past the end of the headers for
66 * content modification. I enabled it for filter_popups.
67 * Someone else should look to see if other similar operations should be
68 * done to the discarded portion of the buffer.
70 * Note 2001/07/20: No, the other content modification mechanisms will process
71 * the whole iob later anyway. --oes
73 * Revision 1.26 2001/07/18 12:31:36 oes
76 * Revision 1.25 2001/07/15 19:43:49 jongfoster
77 * Supports POSIX threads.
78 * Also removed some unused #includes.
80 * Revision 1.24 2001/07/13 14:00:40 oes
81 * - Generic content modification scheme:
82 * Each feature has its own applicability flag that is set
83 * from csp->action->flags.
84 * Replaced the "filtering" int flag , by a function pointer
85 * "content_filter" to the function that will do the content
86 * modification. If it is != NULL, the document will be buffered
87 * and processed through *content_filter, which must set
88 * csp->content_length and return a modified copy of the body
89 * or return NULL (on failiure).
90 * - Changed csp->is_text to the more generic bitmap csp->content_type
91 * which can currently take the valued CT_TEXT or CT_GIF
93 * - Removed all #ifdef PCRS
95 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
96 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
97 * the `block_acl' call. This prevents a compilation error when the user
98 * does not wish to use the "ACL" feature.
100 * Revision 1.22 2001/06/29 21:45:41 oes
101 * Indentation, CRLF->LF, Tab-> Space
103 * Revision 1.21 2001/06/29 13:29:36 oes
104 * - Cleaned up, improved comments
105 * - Unified all possible interceptors (CGI,
106 * block, trust, fast_redirect) in one
107 * place, with one (CGI) answer generation
108 * mechansim. Much clearer now.
109 * - Removed the GIF image generation, which
110 * is now done in filters.c:block_url()
111 * - Made error conditions like domain lookup
112 * failiure or (various) problems while talking
113 * to the server use cgi.c:error_response()
114 * instead of generating HTML/HTTP in chat() (yuck!)
115 * - Removed logentry from cancelled commit
117 * Revision 1.20 2001/06/09 10:55:28 jongfoster
118 * Changing BUFSIZ ==> BUFFER_SIZE
120 * Revision 1.19 2001/06/07 23:12:52 jongfoster
121 * Replacing function pointer in struct gateway with a directly
122 * called function forwarded_connect().
123 * Replacing struct gateway with struct forward_spec
125 * Revision 1.18 2001/06/03 19:12:16 oes
126 * introduced new cgi handling
128 * Revision 1.17 2001/06/01 20:07:23 jongfoster
129 * Now uses action +image-blocker{} rather than config->tinygif
131 * Revision 1.16 2001/06/01 18:49:17 jongfoster
132 * Replaced "list_share" with "list" - the tiny memory gain was not
133 * worth the extra complexity.
135 * Revision 1.15 2001/05/31 21:24:47 jongfoster
136 * Changed "permission" to "action" throughout.
137 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
138 * Moved vanilla wafer check into chat(), since we must now
139 * decide whether or not to add it based on the URL.
141 * Revision 1.14 2001/05/29 20:14:01 joergs
142 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
145 * Revision 1.13 2001/05/29 09:50:24 jongfoster
146 * Unified blocklist/imagelist/permissionslist.
147 * File format is still under discussion, but the internal changes
150 * Also modified interceptor behaviour:
151 * - We now intercept all URLs beginning with one of the following
152 * prefixes (and *only* these prefixes):
154 * * http://ijbswa.sf.net/config/
155 * * http://ijbswa.sourceforge.net/config/
156 * - New interceptors "home page" - go to http://i.j.b/ to see it.
157 * - Internal changes so that intercepted and fast redirect pages
158 * are not replaced with an image.
159 * - Interceptors now have the option to send a binary page direct
160 * to the client. (i.e. ijb-send-banner uses this)
161 * - Implemented show-url-info interceptor. (Which is why I needed
162 * the above interceptors changes - a typical URL is
163 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
164 * The previous mechanism would not have intercepted that, and
165 * if it had been intercepted then it then it would have replaced
168 * Revision 1.12 2001/05/27 22:17:04 oes
170 * - re_process_buffer no longer writes the modified buffer
171 * to the client, which was very ugly. It now returns the
172 * buffer, which it is then written by chat.
174 * - content_length now adjusts the Content-Length: header
175 * for modified documents rather than crunch()ing it.
176 * (Length info in csp->content_length, which is 0 for
177 * unmodified documents)
179 * - For this to work, sed() is called twice when filtering.
181 * Revision 1.11 2001/05/26 17:27:53 jongfoster
182 * Added support for CLF and fixed LOG_LEVEL_LOG.
183 * Also did CRLF->LF fix of my previous patch.
185 * Revision 1.10 2001/05/26 15:26:15 jongfoster
186 * ACL feature now provides more security by immediately dropping
187 * connections from untrusted hosts.
189 * Revision 1.9 2001/05/26 00:28:36 jongfoster
190 * Automatic reloading of config file.
191 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
192 * Most of the global variables have been moved to a new
193 * struct configuration_spec, accessed through csp->config->globalname
194 * Most of the globals remaining are used by the Win32 GUI.
196 * Revision 1.8 2001/05/25 22:43:18 jongfoster
197 * Fixing minor memory leak and buffer overflow.
199 * Revision 1.7 2001/05/25 22:34:30 jongfoster
202 * Revision 1.6 2001/05/23 00:13:58 joergs
203 * AmigaOS support fixed.
205 * Revision 1.5 2001/05/22 18:46:04 oes
207 * - Enabled filtering banners by size rather than URL
208 * by adding patterns that replace all standard banner
209 * sizes with the "Junkbuster" gif to the re_filterfile
211 * - Enabled filtering WebBugs by providing a pattern
212 * which kills all 1x1 images
214 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
215 * which is selected by the (nonstandard and therefore
216 * capital) letter 'U' in the option string.
217 * It causes the quantifiers to be ungreedy by default.
218 * Appending a ? turns back to greedy (!).
220 * - Added a new interceptor ijb-send-banner, which
221 * sends back the "Junkbuster" gif. Without imagelist or
222 * MSIE detection support, or if tinygif = 1, or the
223 * URL isn't recognized as an imageurl, a lame HTML
224 * explanation is sent instead.
226 * - Added new feature, which permits blocking remote
227 * script redirects and firing back a local redirect
229 * The feature is conditionally compiled, i.e. it
230 * can be disabled with --disable-fast-redirects,
231 * plus it must be activated by a "fast-redirects"
232 * line in the config file, has its own log level
233 * and of course wants to be displayed by show-proxy-args
234 * Note: Boy, all the #ifdefs in 1001 locations and
235 * all the fumbling with configure.in and acconfig.h
236 * were *way* more work than the feature itself :-(
238 * - Because a generic redirect template was needed for
239 * this, tinygif = 3 now uses the same.
241 * - Moved GIFs, and other static HTTP response templates
246 * - Removed some >400 CRs again (Jon, you really worked
249 * Revision 1.4 2001/05/21 19:34:01 jongfoster
250 * Made failure to bind() a fatal error.
252 * Revision 1.3 2001/05/20 01:21:20 jongfoster
253 * Version 2.9.4 checkin.
254 * - Merged popupfile and cookiefile, and added control over PCRS
255 * filtering, in new "permissionsfile".
256 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
257 * file error you now get a message box (in the Win32 GUI) rather
258 * than the program exiting with no explanation.
259 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
261 * - Removed tabs from "config"
262 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
263 * - Bumped up version number.
265 * Revision 1.2 2001/05/17 22:34:44 oes
266 * - Added hint on GIF char array generation to jcc.c
267 * - Cleaned CRLF's from the sources and related files
268 * - Repaired logging for REF and FRC
270 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
271 * Initial import of version 2.9.3 source tree
274 *********************************************************************/
280 #include <sys/types.h>
287 #ifdef FEATURE_PTHREAD
289 #endif /* def FEATURE_PTHREAD */
292 # ifndef FEATURE_PTHREAD
293 # include <windows.h>
294 # include <process.h>
295 # endif /* ndef FEATURE_PTHREAD */
298 # ifndef _WIN_CONSOLE
300 # endif /* ndef _WIN_CONSOLE */
302 #else /* ifndef _WIN32 */
305 # include <sys/time.h>
306 # include <sys/wait.h>
307 # include <sys/stat.h>
311 # include <socket.h> /* BeOS has select() for sockets only. */
312 # include <OS.h> /* declarations for threads and stuff. */
326 #include "showargs.h"
328 #include "killpopup.h"
329 #include "miscutil.h"
331 #include "jbsockets.h"
337 const char jcc_h_rcs[] = JCC_H_VERSION;
338 const char project_h_rcs[] = PROJECT_H_VERSION;
340 struct client_state clients[1];
341 struct file_list files[1];
343 #ifdef FEATURE_STATISTICS
344 int urls_read = 0; /* total nr of urls read inc rejected */
345 int urls_rejected = 0; /* total nr of urls rejected */
346 #endif /* def FEATURE_STATISTICS */
349 static void listen_loop(void);
350 static void chat(struct client_state *csp);
352 void serve(struct client_state *csp);
353 #else /* ifndef AMIGA */
354 static void serve(struct client_state *csp);
355 #endif /* def AMIGA */
358 static int32 server_thread(void *data);
359 #endif /* def __BEOS__ */
362 #define sleep(N) Sleep(((N) * 1000))
366 /* The vanilla wafer. */
367 static const char VANILLA_WAFER[] =
368 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
369 "Do_not_send_me_any_copyrighted_information_other_than_the_"
370 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
371 "In_particular_do_not_send_me_any_cookies_that_"
372 "are_subject_to_a_claim_of_copyright_by_anybody._"
373 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
374 "(copyright_or_otherwise)_applying_to_any_cookie._";
377 /*********************************************************************
381 * Description : Once a connection to the client has been accepted,
382 * this function is called (via serve()) to handle the
383 * main business of the communication. When this
384 * function returns, the caller must close the client
388 * 1 : csp = Current client state (buffers, headers, etc...)
390 * Returns : On success, the number of bytes written are returned (zero
391 * indicates nothing was written). On error, -1 is returned,
392 * and errno is set appropriately. If count is zero and the
393 * file descriptor refers to a regular file, 0 will be
394 * returned without causing any other effect. For a special
395 * file, the results are not portable.
397 *********************************************************************/
398 static void chat(struct client_state *csp)
401 * This next lines are a little ugly, but they simplifies the if statements
402 * below. Basically if TOGGLE, then we want the if to test "csp->toggled_on",
403 * else we don't. And if FEATURE_FORCE_LOAD, then we want the if to test
404 * "csp->toggled_on", else we don't
406 #ifdef FEATURE_TOGGLE
407 # define IS_TOGGLED_ON_AND (csp->toggled_on) &&
408 #else /* ifndef FEATURE_TOGGLE */
409 # define IS_TOGGLED_ON_AND
410 #endif /* ndef FEATURE_TOGGLE */
411 #ifdef FEATURE_FORCE_LOAD
412 # define IS_NOT_FORCED_AND (!csp->force) &&
413 #else /* ifndef FEATURE_FORCE_LOAD */
414 # define IS_NOT_FORCED_AND
415 #endif /* def FEATURE_FORCE_LOAD */
417 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
419 char buf[BUFFER_SIZE];
423 int n, maxfd, server_body;
424 int ms_iis5_hack = 0;
426 const struct forward_spec * fwd;
427 struct http_request *http;
428 #ifdef FEATURE_KILL_POPUPS
429 int block_popups; /* bool, 1==will block popups */
430 int block_popups_now = 0; /* bool, 1==currently blocking popups */
431 #endif /* def FEATURE_KILL_POPUPS */
433 int pcrs_filter; /* bool, 1==will filter through pcrs */
434 int gif_deanimate; /* bool, 1==will deanimate gifs */
436 /* Function that does the content filtering for the current request */
437 char *(*content_filter)() = NULL;
439 /* Skeleton for HTTP response, if we should intercept the request */
440 struct http_response *rsp;
445 * Read the client's request. Note that since we're not using select() we
446 * could get blocked here if a client connected, then didn't say anything!
451 n = read_socket(csp->cfd, buf, sizeof(buf));
453 if (n <= 0) break; /* error! */
455 add_to_iob(csp, buf, n);
457 req = get_header(csp);
461 break; /* no HTTP request! */
466 continue; /* more to come! */
469 #ifdef FEATURE_FORCE_LOAD
470 /* If this request contains the FORCE_PREFIX,
471 * better get rid of it now and set the force flag --oes
474 if (strstr(req, FORCE_PREFIX))
476 strclean(req, FORCE_PREFIX);
477 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
484 #endif /* def FEATURE_FORCE_LOAD */
486 parse_http_request(req, http, csp);
491 if (http->cmd == NULL)
493 strcpy(buf, CHEADER);
494 write_socket(csp->cfd, buf, strlen(buf));
496 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
501 /* decide how to route the HTTP request */
503 if ((fwd = forward_url(http, csp)) == NULL)
505 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
506 /* Never get here - LOG_LEVEL_FATAL causes program exit */
509 /* build the http request to send to the server
510 * we have to do one of the following:
512 * create = use the original HTTP request to create a new
513 * HTTP request that has only the path component
514 * without the http://domainspec
515 * pass = pass the original HTTP request unchanged
517 * drop = drop the HTTP request
522 * +--------+--------+
524 * 0 | create | drop |
526 * Forwarding +--------+--------+
530 * +--------+--------+
534 if (fwd->forward_host)
536 /* if forwarding, just pass the request as is */
537 enlist(csp->headers, http->cmd);
543 /* otherwise elide the host information from the url */
545 p = strsav(p, http->gpc);
547 p = strsav(p, http->path);
549 p = strsav(p, http->ver);
550 enlist(csp->headers, p);
555 /* decide what we're to do with cookies */
557 #ifdef FEATURE_TOGGLE
558 if (!csp->toggled_on)
560 /* Most compatible set of actions (i.e. none) */
561 init_current_action(csp->action);
564 #endif /* ndef FEATURE_TOGGLE */
566 url_actions(http, csp);
569 #ifdef FEATURE_COOKIE_JAR
571 * If we're logging cookies in a cookie jar, and the user has not
572 * supplied any wafers, and the user has not told us to suppress the
573 * vanilla wafer, then send the vanilla wafer.
575 if ((csp->config->jarfile != NULL)
576 && (csp->action->multi[ACTION_MULTI_WAFER]->next == NULL)
577 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
579 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
581 #endif /* def FEATURE_COOKIE_JAR */
583 #ifdef FEATURE_KILL_POPUPS
584 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
585 #endif /* def FEATURE_KILL_POPUPS */
587 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
588 ((csp->action->flags & ACTION_FILTER) != 0);
590 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
592 /* grab the rest of the client's headers */
596 if ( ( p = get_header(csp) ) && ( *p == '\0' ) )
598 n = read_socket(csp->cfd, buf, sizeof(buf));
601 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
604 add_to_iob(csp, buf, n);
608 if (p == NULL) break;
610 enlist(csp->headers, p);
614 /* We have a request. */
616 hdr = sed(client_patterns, add_client_headers, csp);
617 destroy_list(csp->headers);
620 * Now, check to see if we need to intercept it, i.e.
625 /* a CGI call was detected and answered */
626 (NULL != (rsp = dispatch_cgi(csp)))
628 /* or we are enabled and... */
631 /* ..the request was blocked */
632 ( NULL != (rsp = block_url(csp)))
636 || ( NULL != (rsp = trust_url(csp)))
637 #endif /* def FEATURE_TRUST */
639 /* ..or a fast redirect kicked in */
640 #ifdef FEATURE_FAST_REDIRECTS
641 || (((csp->action->flags & ACTION_FAST_REDIRECTS) != 0) &&
642 (NULL != (rsp = redirect_url(csp))))
643 #endif /* def FEATURE_FAST_REDIRECTS */
647 /* Write the answer to the client */
648 if ((write_socket(csp->cfd, rsp->head, rsp->head_length) != rsp->head_length)
649 || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length))
651 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
654 #ifdef FEATURE_STATISTICS
655 /* Count as a rejected request */
657 #endif /* def FEATURE_STATISTICS */
659 /* Log (FIXME: All intercept reasons apprear as "crunch" with Status 200) */
660 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
661 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->cmd);
663 /* Clean up and return */
664 free_http_response(rsp);
669 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
671 if (fwd->forward_host)
673 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
674 fwd->forward_host, fwd->forward_port, http->hostport);
678 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
681 /* here we connect to the server, gateway, or the forwarder */
683 csp->sfd = forwarded_connect(fwd, http, csp);
687 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
692 rsp = error_response(csp, "no-such-domain", errno);
694 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
695 csp->ip_addr_str, http->cmd);
699 rsp = error_response(csp, "connect-failed", errno);
701 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
702 csp->ip_addr_str, http->cmd);
705 /* Write the answer to the client */
708 if ((write_socket(csp->cfd, rsp->head, rsp->head_length) != rsp->head_length)
709 || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length))
711 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
715 free_http_response(rsp);
720 log_error(LOG_LEVEL_CONNECT, "OK");
722 if (fwd->forward_host || (http->ssl == 0))
724 /* write the client's (modified) header to the server
725 * (along with anything else that may be in the buffer)
730 if ((write_socket(csp->sfd, hdr, n) != n)
731 || (flush_socket(csp->sfd, csp ) < 0))
733 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
736 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
737 csp->ip_addr_str, http->cmd);
739 rsp = error_response(csp, "connect-failed", errno);
743 if ((write_socket(csp->cfd, rsp->head, n) != n)
744 || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length))
746 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
750 free_http_response(rsp);
758 * We're running an SSL tunnel and we're not forwarding,
759 * so just send the "connect succeeded" message to the
760 * client, flush the rest, and get out of the way.
762 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
763 csp->ip_addr_str, http->cmd);
765 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1) < 0)
773 /* we're finished with the client's header */
776 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
778 /* pass data between the client and server
779 * until one or the other shuts down the connection.
788 FD_SET(csp->cfd, &rfds);
789 FD_SET(csp->sfd, &rfds);
791 n = select(maxfd+1, &rfds, NULL, NULL, NULL);
795 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
799 /* this is the body of the browser's request
800 * just read it and write it.
803 if (FD_ISSET(csp->cfd, &rfds))
805 n = read_socket(csp->cfd, buf, sizeof(buf));
809 break; /* "game over, man" */
812 if (write_socket(csp->sfd, buf, n) != n)
814 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
821 * The server wants to talk. It could be the header or the body.
822 * If `hdr' is null, then it's the header otherwise it's the body.
823 * FIXME: Does `hdr' really mean `host'? No.
827 if (FD_ISSET(csp->sfd, &rfds))
830 n = read_socket(csp->sfd, buf, sizeof(buf) - 1);
834 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
836 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
837 csp->ip_addr_str, http->cmd);
839 rsp = error_response(csp, "connect-failed", errno);
843 if ((write_socket(csp->cfd, rsp->head, rsp->head_length) != rsp->head_length)
844 || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length))
846 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
850 free_http_response(rsp);
854 /* Add a trailing zero. This lets filter_popups
855 * use string operations.
859 #ifdef FEATURE_KILL_POPUPS
860 /* Filter the popups on this read. */
861 if (block_popups_now)
865 #endif /* def FEATURE_KILL_POPUPS */
867 /* Normally, this would indicate that we've read
868 * as much as the server has sent us and we can
869 * close the client connection. However, Microsoft
870 * in its wisdom has released IIS/5 with a bug that
871 * prevents it from sending the trailing \r\n in
872 * a 302 redirect header (and possibly other headers).
873 * To work around this if we've haven't parsed
874 * a full header we'll append a trailing \r\n
875 * and see if this now generates a valid one.
877 * This hack shouldn't have any impacts. If we've
878 * already transmitted the header or if this is a
879 * SSL connection, then we won't bother with this
880 * hack. So we only work on partially received
881 * headers. If we append a \r\n and this still
882 * doesn't generate a valid header, then we won't
883 * transmit anything to the client.
888 if (server_body || http->ssl)
891 * If we have been buffering up the document,
892 * now is the time to apply content modification
893 * and send the result to the client.
898 * If the content filter fails, use the original
900 * (see p != NULL ? p : csp->iob->cur below)
902 if (NULL == (p = (*content_filter)(csp)))
904 csp->content_length = csp->iob->eod - csp->iob->cur;
907 hdr = sed(server_patterns, add_server_headers, csp);
910 if ((write_socket(csp->cfd, hdr, n) != n)
911 || (write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length) != csp->content_length))
913 log_error(LOG_LEVEL_CONNECT, "write modified content to client failed: %E");
921 break; /* "game over, man" */
925 * This is NOT the body, so
926 * Let's pretend the server just sent us a blank line.
928 n = sprintf(buf, "\r\n");
931 * Now, let the normal header parsing algorithm below do its
932 * job. If it fails, we'll exit instead of continuing.
939 * If this is an SSL connection or we're in the body
940 * of the server document, just write it to the client,
941 * unless we need to buffer the body for later content-filtering
944 if (server_body || http->ssl)
948 add_to_iob(csp, buf, n);
952 if (write_socket(csp->cfd, buf, n) != n)
954 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
963 /* we're still looking for the end of the
964 * server's header ... (does that make header
965 * parsing an "out of body experience" ?
968 /* buffer up the data we just read */
969 add_to_iob(csp, buf, n);
971 /* get header lines from the iob */
973 while ((p = get_header(csp)))
977 /* see following note */
980 enlist(csp->headers, p);
984 /* NOTE: there are no "empty" headers so
985 * if the pointer `p' is not NULL we must
986 * assume that we reached the end of the
987 * buffer before we hit the end of the header.
994 /* Well, we tried our MS IIS/5
995 * hack and it didn't work.
996 * The header is incomplete
997 * and there isn't anything
998 * we can do about it.
1004 /* Since we have to wait for
1005 * more from the server before
1006 * we can parse the headers
1007 * we just continue here.
1013 /* we have now received the entire header.
1014 * filter it and send the result to the client
1017 hdr = sed(server_patterns, add_server_headers, csp);
1020 /* write the server's (modified) header to
1021 * the client (along with anything else that
1022 * may be in the buffer)
1025 #ifdef FEATURE_KILL_POPUPS
1026 /* Start blocking popups if appropriate. */
1028 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1029 !http->ssl && /* We talk plaintext */
1030 block_popups) /* Policy allows */
1032 block_popups_now = 1;
1034 * Filter the part of the body that came in the same read
1035 * as the last headers:
1037 filter_popups(csp->iob->cur);
1040 #endif /* def FEATURE_KILL_POPUPS */
1042 /* Buffer and pcrs filter this if appropriate. */
1044 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1045 !http->ssl && /* We talk plaintext */
1046 pcrs_filter) /* Policy allows */
1048 content_filter = pcrs_filter_response;
1051 /* Buffer and gif_deanimate this if appropriate. */
1053 if ((csp->content_type & CT_GIF) && /* It's a image/gif MIME-Type */
1054 !http->ssl && /* We talk plaintext */
1055 gif_deanimate) /* Policy allows */
1057 content_filter = gif_deanimate_response;
1062 * Only write if we're not buffering for content modification
1064 if (!content_filter && ((write_socket(csp->cfd, hdr, n) != n)
1065 || (n = flush_socket(csp->cfd, csp) < 0)))
1067 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1069 /* the write failed, so don't bother
1070 * mentioning it to the client...
1071 * it probably can't hear us anyway.
1077 !content_filter && (byte_count += n);
1079 /* we're finished with the server's header */
1084 /* If this was a MS IIS/5 hack then it means
1085 * the server has already closed the
1086 * connection. Nothing more to read. Time
1097 return; /* huh? we should never get here */
1100 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
1101 csp->ip_addr_str, http->cmd, byte_count);
1105 /*********************************************************************
1109 * Description : This is little more than chat. We only "serve" to
1110 * to close any socket that chat may have opened.
1113 * 1 : csp = Current client state (buffers, headers, etc...)
1117 *********************************************************************/
1119 void serve(struct client_state *csp)
1120 #else /* ifndef AMIGA */
1121 static void serve(struct client_state *csp)
1122 #endif /* def AMIGA */
1125 close_socket(csp->cfd);
1129 close_socket(csp->sfd);
1138 /*********************************************************************
1140 * Function : server_thread
1142 * Description : We only exist to call `serve' in a threaded environment.
1145 * 1 : data = Current client state (buffers, headers, etc...)
1147 * Returns : Always 0.
1149 *********************************************************************/
1150 static int32 server_thread(void *data)
1152 serve((struct client_state *) data);
1159 /*********************************************************************
1163 * Description : Load the config file and start the listen loop.
1164 * This function is a lot more *sane* with the `load_config'
1165 * and `listen_loop' functions; although it stills does
1166 * a *little* too much for my taste.
1169 * 1 : argc = Number of parameters (including $0).
1170 * 2 : argv = Array of (char *)'s to the parameters.
1172 * Returns : 1 if : can't open config file, unrecognized directive,
1173 * stats requested in multi-thread mode, can't open the
1174 * log file, can't open the jar file, listen port is invalid,
1175 * any load fails, and can't bind port.
1177 * Else main never returns, the process must be signaled
1178 * to terminate execution. Or, on Windows, use the
1179 * "File", "Exit" menu option.
1181 *********************************************************************/
1183 int real_main(int argc, const char *argv[])
1185 int main(int argc, const char *argv[])
1190 "AmiTCP:db/junkbuster/config"
1191 #elif !defined(_WIN32)
1198 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1199 if ((argc >= 2) && (strcmp(argv[1], "--help")==0))
1201 printf("JunkBuster proxy version " VERSION ".\n\n"
1202 "Usage: %s [configfile]\n\n"
1203 "See " HOME_PAGE_URL " for details.\n"
1204 "This program is distributed under the GNU GPL, version 2 or later.\n",
1208 if ((argc >= 2) && (strcmp(argv[1], "--version")==0))
1210 printf(VERSION "\n");
1213 #endif /* !defined(_WIN32) || defined(_WIN_CONSOLE) */
1220 configfile = argv[1];
1227 #elif defined(_WIN32)
1233 signal(SIGPIPE, SIG_IGN);
1234 signal(SIGCHLD, SIG_IGN);
1236 #else /* ifdef _WIN32 */
1237 # ifdef _WIN_CONSOLE
1239 * We *are* in a windows console app.
1240 * Print a verbose messages about FAQ's and such
1242 printf(win32_blurb);
1243 # endif /* def _WIN_CONSOLE */
1244 #endif /* def _WIN32 */
1255 /*********************************************************************
1257 * Function : listen_loop
1259 * Description : bind the listen port and enter a "FOREVER" listening loop.
1265 *********************************************************************/
1266 static void listen_loop(void)
1268 struct client_state *csp = NULL;
1270 struct configuration_spec * config;
1272 config = load_config();
1274 log_error(LOG_LEVEL_CONNECT, "bind (%s, %d)",
1275 config->haddr ? config->haddr : "INADDR_ANY", config->hport);
1277 bfd = bind_port(config->haddr, config->hport);
1281 log_error(LOG_LEVEL_FATAL, "can't bind %s:%d: %E "
1282 "- There may be another junkbuster or some other "
1283 "proxy running on port %d",
1284 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
1285 config->hport, config->hport
1287 /* shouldn't get here */
1291 config->need_bind = 0;
1296 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA)
1297 while (waitpid(-1, NULL, WNOHANG) > 0)
1299 /* zombie children */
1301 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
1304 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
1306 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
1310 memset(csp, '\0', sizeof(*csp));
1315 csp->config = config = load_config();
1317 if ( config->need_bind )
1320 * Since we were listening to the "old port", we will not see
1321 * a "listen" param change until the next IJB request. So, at
1322 * least 1 more request must be made for us to find the new
1323 * setting. I am simply closing the old socket and binding the
1326 * Which-ever is correct, we will serve 1 more page via the
1327 * old settings. This should probably be a "show-proxy-args"
1328 * request. This should not be a so common of an operation
1329 * that this will hurt people's feelings.
1334 log_error(LOG_LEVEL_CONNECT, "bind (%s, %d)",
1335 config->haddr ? config->haddr : "INADDR_ANY", config->hport);
1336 bfd = bind_port(config->haddr, config->hport);
1340 log_error(LOG_LEVEL_FATAL, "can't bind %s:%d: %E "
1341 "- There may be another junkbuster or some other "
1342 "proxy running on port %d",
1343 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
1344 config->hport, config->hport
1346 /* shouldn't get here */
1350 config->need_bind = 0;
1353 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
1355 if (!accept_connection(csp, bfd))
1357 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
1370 log_error(LOG_LEVEL_CONNECT, "OK");
1373 #ifdef FEATURE_TOGGLE
1374 /* by haroon - most of credit to srt19170 */
1375 csp->toggled_on = g_bToggleIJB;
1376 #endif /* def FEATURE_TOGGLE */
1378 if (run_loader(csp))
1380 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
1381 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1385 if (block_acl(NULL,csp))
1387 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
1388 close_socket(csp->cfd);
1392 #endif /* def FEATURE_ACL */
1394 /* add it to the list of clients */
1395 csp->next = clients->next;
1396 clients->next = csp;
1398 if (config->multi_threaded)
1402 /* this is a switch () statment in the C preprocessor - ugh */
1403 #undef SELECTED_ONE_OPTION
1405 /* Use Pthreads in preference to native code */
1406 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
1407 #define SELECTED_ONE_OPTION
1409 pthread_t the_thread;
1410 pthread_attr_t attrs;
1412 pthread_attr_init(&attrs);
1413 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
1414 child_id = (pthread_create(&the_thread, &attrs,
1415 (void*)serve, csp) ? -1 : 0);
1416 pthread_attr_destroy(&attrs);
1420 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
1421 #define SELECTED_ONE_OPTION
1422 child_id = _beginthread(
1428 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
1429 #define SELECTED_ONE_OPTION
1431 thread_id tid = spawn_thread
1432 (server_thread, "server", B_NORMAL_PRIORITY, csp);
1434 if ((tid >= 0) && (resume_thread(tid) == B_OK))
1436 child_id = (int) tid;
1445 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
1446 #define SELECTED_ONE_OPTION
1447 csp->cfd = ReleaseSocket(csp->cfd, -1);
1448 if((child_id = (int)CreateNewProcTags(
1449 NP_Entry, (ULONG)server_thread,
1450 NP_Output, Output(),
1451 NP_CloseOutput, FALSE,
1452 NP_Name, (ULONG)"junkbuster child",
1453 NP_StackSize, 200*1024,
1457 ((struct Task *)child_id)->tc_UserData = csp;
1458 Signal((struct Task *)child_id, SIGF_SINGLE);
1463 #if !defined(SELECTED_ONE_OPTION)
1466 /* This block is only needed when using fork().
1467 * When using threads, the server thread was
1468 * created and run by the call to _beginthread().
1470 if (child_id == 0) /* child */
1476 else if (child_id > 0) /* parent */
1478 /* in a fork()'d environment, the parent's
1479 * copy of the client socket and the CSP
1483 #if !defined(_WIN32) && defined(__CYGWIN__)
1485 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
1486 close_socket(csp->cfd);
1491 #undef SELECTED_ONE_OPTION
1492 /* end of cpp switch () */
1494 if (child_id < 0) /* failed */
1496 char buf[BUFFER_SIZE];
1498 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
1500 sprintf(buf , "JunkBuster: can't fork: errno = %d", errno);
1502 write_socket(csp->cfd, buf, strlen(buf));
1503 close_socket(csp->cfd);