1 const char jcc_rcs[] = "$Id: jcc.c,v 1.31 2001/07/29 12:17:48 oes 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 1.31 2001/07/29 12:17:48 oes
37 * Applied pthread fix by Paul Lieverse
39 * Revision 1.30 2001/07/25 22:57:13 jongfoster
40 * __BEOS__ no longer overrides FEATURE_PTHREAD.
41 * This is because FEATURE_PTHREAD will soon be widely used, so I
42 * want to keep it simple.
44 * Revision 1.29 2001/07/24 12:47:06 oes
45 * Applied BeOS support update by Eugenia
47 * Revision 1.28 2001/07/23 13:26:12 oes
48 * Fixed bug in popup-killing for the first read that caused binary garbage to be sent between headers and body
50 * Revision 1.27 2001/07/19 19:09:47 haroon
51 * - Added code to take care of the situation where while processing the first
52 * server response (which includes the server header), after finding the end
53 * of the headers we were not looking past the end of the headers for
54 * content modification. I enabled it for filter_popups.
55 * Someone else should look to see if other similar operations should be
56 * done to the discarded portion of the buffer.
58 * Note 2001/07/20: No, the other content modification mechanisms will process
59 * the whole iob later anyway. --oes
61 * Revision 1.26 2001/07/18 12:31:36 oes
64 * Revision 1.25 2001/07/15 19:43:49 jongfoster
65 * Supports POSIX threads.
66 * Also removed some unused #includes.
68 * Revision 1.24 2001/07/13 14:00:40 oes
69 * - Generic content modification scheme:
70 * Each feature has its own applicability flag that is set
71 * from csp->action->flags.
72 * Replaced the "filtering" int flag , by a function pointer
73 * "content_filter" to the function that will do the content
74 * modification. If it is != NULL, the document will be buffered
75 * and processed through *content_filter, which must set
76 * csp->content_length and return a modified copy of the body
77 * or return NULL (on failiure).
78 * - Changed csp->is_text to the more generic bitmap csp->content_type
79 * which can currently take the valued CT_TEXT or CT_GIF
81 * - Removed all #ifdef PCRS
83 * Revision 1.23 2001/07/02 02:28:25 iwanttokeepanon
84 * Added "#ifdef ACL_FILES" conditional compilation to line 1291 to exclude
85 * the `block_acl' call. This prevents a compilation error when the user
86 * does not wish to use the "ACL" feature.
88 * Revision 1.22 2001/06/29 21:45:41 oes
89 * Indentation, CRLF->LF, Tab-> Space
91 * Revision 1.21 2001/06/29 13:29:36 oes
92 * - Cleaned up, improved comments
93 * - Unified all possible interceptors (CGI,
94 * block, trust, fast_redirect) in one
95 * place, with one (CGI) answer generation
96 * mechansim. Much clearer now.
97 * - Removed the GIF image generation, which
98 * is now done in filters.c:block_url()
99 * - Made error conditions like domain lookup
100 * failiure or (various) problems while talking
101 * to the server use cgi.c:error_response()
102 * instead of generating HTML/HTTP in chat() (yuck!)
103 * - Removed logentry from cancelled commit
105 * Revision 1.20 2001/06/09 10:55:28 jongfoster
106 * Changing BUFSIZ ==> BUFFER_SIZE
108 * Revision 1.19 2001/06/07 23:12:52 jongfoster
109 * Replacing function pointer in struct gateway with a directly
110 * called function forwarded_connect().
111 * Replacing struct gateway with struct forward_spec
113 * Revision 1.18 2001/06/03 19:12:16 oes
114 * introduced new cgi handling
116 * Revision 1.17 2001/06/01 20:07:23 jongfoster
117 * Now uses action +image-blocker{} rather than config->tinygif
119 * Revision 1.16 2001/06/01 18:49:17 jongfoster
120 * Replaced "list_share" with "list" - the tiny memory gain was not
121 * worth the extra complexity.
123 * Revision 1.15 2001/05/31 21:24:47 jongfoster
124 * Changed "permission" to "action" throughout.
125 * Removed DEFAULT_USER_AGENT - it must now be specified manually.
126 * Moved vanilla wafer check into chat(), since we must now
127 * decide whether or not to add it based on the URL.
129 * Revision 1.14 2001/05/29 20:14:01 joergs
130 * AmigaOS bugfix: PCRS needs a lot of stack, stacksize for child threads
133 * Revision 1.13 2001/05/29 09:50:24 jongfoster
134 * Unified blocklist/imagelist/permissionslist.
135 * File format is still under discussion, but the internal changes
138 * Also modified interceptor behaviour:
139 * - We now intercept all URLs beginning with one of the following
140 * prefixes (and *only* these prefixes):
142 * * http://ijbswa.sf.net/config/
143 * * http://ijbswa.sourceforge.net/config/
144 * - New interceptors "home page" - go to http://i.j.b/ to see it.
145 * - Internal changes so that intercepted and fast redirect pages
146 * are not replaced with an image.
147 * - Interceptors now have the option to send a binary page direct
148 * to the client. (i.e. ijb-send-banner uses this)
149 * - Implemented show-url-info interceptor. (Which is why I needed
150 * the above interceptors changes - a typical URL is
151 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
152 * The previous mechanism would not have intercepted that, and
153 * if it had been intercepted then it then it would have replaced
156 * Revision 1.12 2001/05/27 22:17:04 oes
158 * - re_process_buffer no longer writes the modified buffer
159 * to the client, which was very ugly. It now returns the
160 * buffer, which it is then written by chat.
162 * - content_length now adjusts the Content-Length: header
163 * for modified documents rather than crunch()ing it.
164 * (Length info in csp->content_length, which is 0 for
165 * unmodified documents)
167 * - For this to work, sed() is called twice when filtering.
169 * Revision 1.11 2001/05/26 17:27:53 jongfoster
170 * Added support for CLF and fixed LOG_LEVEL_LOG.
171 * Also did CRLF->LF fix of my previous patch.
173 * Revision 1.10 2001/05/26 15:26:15 jongfoster
174 * ACL feature now provides more security by immediately dropping
175 * connections from untrusted hosts.
177 * Revision 1.9 2001/05/26 00:28:36 jongfoster
178 * Automatic reloading of config file.
179 * Removed obsolete SIGHUP support (Unix) and Reload menu option (Win32).
180 * Most of the global variables have been moved to a new
181 * struct configuration_spec, accessed through csp->config->globalname
182 * Most of the globals remaining are used by the Win32 GUI.
184 * Revision 1.8 2001/05/25 22:43:18 jongfoster
185 * Fixing minor memory leak and buffer overflow.
187 * Revision 1.7 2001/05/25 22:34:30 jongfoster
190 * Revision 1.6 2001/05/23 00:13:58 joergs
191 * AmigaOS support fixed.
193 * Revision 1.5 2001/05/22 18:46:04 oes
195 * - Enabled filtering banners by size rather than URL
196 * by adding patterns that replace all standard banner
197 * sizes with the "Junkbuster" gif to the re_filterfile
199 * - Enabled filtering WebBugs by providing a pattern
200 * which kills all 1x1 images
202 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
203 * which is selected by the (nonstandard and therefore
204 * capital) letter 'U' in the option string.
205 * It causes the quantifiers to be ungreedy by default.
206 * Appending a ? turns back to greedy (!).
208 * - Added a new interceptor ijb-send-banner, which
209 * sends back the "Junkbuster" gif. Without imagelist or
210 * MSIE detection support, or if tinygif = 1, or the
211 * URL isn't recognized as an imageurl, a lame HTML
212 * explanation is sent instead.
214 * - Added new feature, which permits blocking remote
215 * script redirects and firing back a local redirect
217 * The feature is conditionally compiled, i.e. it
218 * can be disabled with --disable-fast-redirects,
219 * plus it must be activated by a "fast-redirects"
220 * line in the config file, has its own log level
221 * and of course wants to be displayed by show-proxy-args
222 * Note: Boy, all the #ifdefs in 1001 locations and
223 * all the fumbling with configure.in and acconfig.h
224 * were *way* more work than the feature itself :-(
226 * - Because a generic redirect template was needed for
227 * this, tinygif = 3 now uses the same.
229 * - Moved GIFs, and other static HTTP response templates
234 * - Removed some >400 CRs again (Jon, you really worked
237 * Revision 1.4 2001/05/21 19:34:01 jongfoster
238 * Made failure to bind() a fatal error.
240 * Revision 1.3 2001/05/20 01:21:20 jongfoster
241 * Version 2.9.4 checkin.
242 * - Merged popupfile and cookiefile, and added control over PCRS
243 * filtering, in new "permissionsfile".
244 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
245 * file error you now get a message box (in the Win32 GUI) rather
246 * than the program exiting with no explanation.
247 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
249 * - Removed tabs from "config"
250 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
251 * - Bumped up version number.
253 * Revision 1.2 2001/05/17 22:34:44 oes
254 * - Added hint on GIF char array generation to jcc.c
255 * - Cleaned CRLF's from the sources and related files
256 * - Repaired logging for REF and FRC
258 * Revision 1.1.1.1 2001/05/15 13:58:56 oes
259 * Initial import of version 2.9.3 source tree
262 *********************************************************************/
268 #include <sys/types.h>
275 #ifdef FEATURE_PTHREAD
277 #endif /* def FEATURE_PTHREAD */
280 # ifndef FEATURE_PTHREAD
281 # include <windows.h>
282 # include <process.h>
283 # endif /* ndef FEATURE_PTHREAD */
286 # ifndef _WIN_CONSOLE
288 # endif /* ndef _WIN_CONSOLE */
290 #else /* ifndef _WIN32 */
293 # include <sys/time.h>
294 # include <sys/wait.h>
295 # include <sys/stat.h>
299 # include <socket.h> /* BeOS has select() for sockets only. */
300 # include <OS.h> /* declarations for threads and stuff. */
314 #include "showargs.h"
316 #include "killpopup.h"
317 #include "miscutil.h"
319 #include "jbsockets.h"
325 const char jcc_h_rcs[] = JCC_H_VERSION;
326 const char project_h_rcs[] = PROJECT_H_VERSION;
328 struct client_state clients[1];
329 struct file_list files[1];
332 int urls_read = 0; /* total nr of urls read inc rejected */
333 int urls_rejected = 0; /* total nr of urls rejected */
334 #endif /* def STATISTICS */
337 static void listen_loop(void);
338 static void chat(struct client_state *csp);
340 void serve(struct client_state *csp);
341 #else /* ifndef AMIGA */
342 static void serve(struct client_state *csp);
343 #endif /* def AMIGA */
346 static int32 server_thread(void *data);
347 #endif /* def __BEOS__ */
350 #define sleep(N) Sleep(((N) * 1000))
354 /* The vanilla wafer. */
355 static const char VANILLA_WAFER[] =
356 "NOTICE=TO_WHOM_IT_MAY_CONCERN_"
357 "Do_not_send_me_any_copyrighted_information_other_than_the_"
358 "document_that_I_am_requesting_or_any_of_its_necessary_components._"
359 "In_particular_do_not_send_me_any_cookies_that_"
360 "are_subject_to_a_claim_of_copyright_by_anybody._"
361 "Take_notice_that_I_refuse_to_be_bound_by_any_license_condition_"
362 "(copyright_or_otherwise)_applying_to_any_cookie._";
365 /*********************************************************************
369 * Description : Once a connection to the client has been accepted,
370 * this function is called (via serve()) to handle the
371 * main business of the communication. When this
372 * function returns, the caller must close the client
376 * 1 : csp = Current client state (buffers, headers, etc...)
378 * Returns : On success, the number of bytes written are returned (zero
379 * indicates nothing was written). On error, -1 is returned,
380 * and errno is set appropriately. If count is zero and the
381 * file descriptor refers to a regular file, 0 will be
382 * returned without causing any other effect. For a special
383 * file, the results are not portable.
385 *********************************************************************/
386 static void chat(struct client_state *csp)
389 * This next lines are a little ugly, but they simplifies the if statements below.
390 * Basically if TOGGLE, then we want the if to test "csp->toggled_on", else we don't
391 * And if FORCE_LOAD, then we want the if to test "csp->toggled_on", else we don't
394 # define IS_TOGGLED_ON_AND (csp->toggled_on) &&
395 #else /* ifndef TOGGLE */
396 # define IS_TOGGLED_ON_AND
397 #endif /* ndef TOGGLE */
399 # define IS_NOT_FORCED_AND (!csp->force) &&
400 #else /* ifndef FORCE_LOAD */
401 # define IS_NOT_FORCED_AND
402 #endif /* def FORCE_LOAD */
404 #define IS_ENABLED_AND IS_TOGGLED_ON_AND IS_NOT_FORCED_AND
406 char buf[BUFFER_SIZE];
410 int n, maxfd, server_body;
411 int ms_iis5_hack = 0;
413 const struct forward_spec * fwd;
414 struct http_request *http;
416 int block_popups; /* bool, 1==will block popups */
417 int block_popups_now = 0; /* bool, 1==currently blocking popups */
418 #endif /* def KILLPOPUPS */
420 int pcrs_filter; /* bool, 1==will filter through pcrs */
421 int gif_deanimate; /* bool, 1==will deanimate gifs */
423 /* Function that does the content filtering for the current request */
424 char *(*content_filter)() = NULL;
426 /* Skeleton for HTTP response, if we should intercept the request */
427 struct http_response *rsp;
432 * Read the client's request. Note that since we're not using select() we
433 * could get blocked here if a client connected, then didn't say anything!
438 n = read_socket(csp->cfd, buf, sizeof(buf));
440 if (n <= 0) break; /* error! */
442 add_to_iob(csp, buf, n);
444 req = get_header(csp);
448 break; /* no HTTP request! */
453 continue; /* more to come! */
457 /* If this request contains the FORCE_PREFIX,
458 * better get rid of it now and set the force flag --oes
461 if (strstr(req, FORCE_PREFIX))
463 strclean(req, FORCE_PREFIX);
464 log_error(LOG_LEVEL_FORCE, "Enforcing request \"%s\".\n", req);
471 #endif /* def FORCE_LOAD */
473 parse_http_request(req, http, csp);
478 if (http->cmd == NULL)
480 strcpy(buf, CHEADER);
481 write_socket(csp->cfd, buf, strlen(buf));
483 log_error(LOG_LEVEL_CLF, "%s - - [%T] \" \" 400 0", csp->ip_addr_str);
488 /* decide how to route the HTTP request */
490 if ((fwd = forward_url(http, csp)) == NULL)
492 log_error(LOG_LEVEL_FATAL, "gateway spec is NULL!?!? This can't happen!");
493 /* Never get here - LOG_LEVEL_FATAL causes program exit */
496 /* build the http request to send to the server
497 * we have to do one of the following:
499 * create = use the original HTTP request to create a new
500 * HTTP request that has only the path component
501 * without the http://domainspec
502 * pass = pass the original HTTP request unchanged
504 * drop = drop the HTTP request
509 * +--------+--------+
511 * 0 | create | drop |
513 * Forwarding +--------+--------+
517 * +--------+--------+
521 if (fwd->forward_host)
523 /* if forwarding, just pass the request as is */
524 enlist(csp->headers, http->cmd);
530 /* otherwise elide the host information from the url */
532 p = strsav(p, http->gpc);
534 p = strsav(p, http->path);
536 p = strsav(p, http->ver);
537 enlist(csp->headers, p);
542 /* decide what we're to do with cookies */
545 if (!csp->toggled_on)
547 /* Most compatible set of actions (i.e. none) */
548 init_current_action(csp->action);
551 #endif /* ndef TOGGLE */
553 url_actions(http, csp);
558 * If we're logging cookies in a cookie jar, and the user has not
559 * supplied any wafers, and the user has not told us to suppress the
560 * vanilla wafer, then send the vanilla wafer.
562 if ((csp->config->jarfile != NULL)
563 && (csp->action->multi[ACTION_MULTI_WAFER]->next == NULL)
564 && ((csp->action->flags & ACTION_VANILLA_WAFER) != 0))
566 enlist(csp->action->multi[ACTION_MULTI_WAFER], VANILLA_WAFER);
568 #endif /* def JAR_FILES */
571 block_popups = ((csp->action->flags & ACTION_NO_POPUPS) != 0);
572 #endif /* def KILLPOPUPS */
574 pcrs_filter = (csp->rlist != NULL) && /* There are expressions to be used */
575 ((csp->action->flags & ACTION_FILTER) != 0);
577 gif_deanimate = ((csp->action->flags & ACTION_DEANIMATE) != 0);
579 /* grab the rest of the client's headers */
583 if ( ( p = get_header(csp) ) && ( *p == '\0' ) )
585 n = read_socket(csp->cfd, buf, sizeof(buf));
588 log_error(LOG_LEVEL_ERROR, "read from client failed: %E");
591 add_to_iob(csp, buf, n);
595 if (p == NULL) break;
597 enlist(csp->headers, p);
601 /* We have a request. */
603 hdr = sed(client_patterns, add_client_headers, csp);
604 destroy_list(csp->headers);
607 * Now, check to see if we need to intercept it, i.e.
612 /* a CGI call was detected and answered */
613 (NULL != (rsp = dispatch_cgi(csp)))
615 /* or we are enabled and... */
618 /* ..the request was blocked */
619 ( NULL != (rsp = block_url(csp)))
623 || ( NULL != (rsp = trust_url(csp)))
626 /* ..or a fast redirect kicked in */
627 #ifdef FAST_REDIRECTS
628 || (((csp->action->flags & ACTION_FAST_REDIRECTS) != 0) &&
629 (NULL != (rsp = redirect_url(csp))))
630 #endif /* def FAST_REDIRECTS */
634 /* Write the answer to the client */
635 if ((write_socket(csp->cfd, rsp->head, rsp->head_length) != rsp->head_length)
636 || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length))
638 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
642 /* Count as a rejected request */
644 #endif /* def STATISTICS */
646 /* Log (FIXME: All intercept reasons apprear as "crunch" with Status 200) */
647 log_error(LOG_LEVEL_GPC, "%s%s crunch!", http->hostport, http->path);
648 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 3", csp->ip_addr_str, http->cmd);
650 /* Clean up and return */
651 free_http_response(rsp);
656 log_error(LOG_LEVEL_GPC, "%s%s", http->hostport, http->path);
658 if (fwd->forward_host)
660 log_error(LOG_LEVEL_CONNECT, "via %s:%d to: %s",
661 fwd->forward_host, fwd->forward_port, http->hostport);
665 log_error(LOG_LEVEL_CONNECT, "to %s", http->hostport);
668 /* here we connect to the server, gateway, or the forwarder */
670 csp->sfd = forwarded_connect(fwd, http, csp);
674 log_error(LOG_LEVEL_CONNECT, "connect to: %s failed: %E",
679 rsp = error_response(csp, "no-such-domain", errno);
681 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 404 0",
682 csp->ip_addr_str, http->cmd);
686 rsp = error_response(csp, "connect-failed", errno);
688 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
689 csp->ip_addr_str, http->cmd);
692 /* Write the answer to the client */
695 if ((write_socket(csp->cfd, rsp->head, rsp->head_length) != rsp->head_length)
696 || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length))
698 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
702 free_http_response(rsp);
707 log_error(LOG_LEVEL_CONNECT, "OK");
709 if (fwd->forward_host || (http->ssl == 0))
711 /* write the client's (modified) header to the server
712 * (along with anything else that may be in the buffer)
717 if ((write_socket(csp->sfd, hdr, n) != n)
718 || (flush_socket(csp->sfd, csp ) < 0))
720 log_error(LOG_LEVEL_CONNECT, "write header to: %s failed: %E",
723 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
724 csp->ip_addr_str, http->cmd);
726 rsp = error_response(csp, "connect-failed", errno);
730 if ((write_socket(csp->cfd, rsp->head, n) != n)
731 || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length))
733 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
737 free_http_response(rsp);
745 * We're running an SSL tunnel and we're not forwarding,
746 * so just send the "connect succeeded" message to the
747 * client, flush the rest, and get out of the way.
749 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 2\n",
750 csp->ip_addr_str, http->cmd);
752 if (write_socket(csp->cfd, CSUCCEED, sizeof(CSUCCEED)-1) < 0)
760 /* we're finished with the client's header */
763 maxfd = ( csp->cfd > csp->sfd ) ? csp->cfd : csp->sfd;
765 /* pass data between the client and server
766 * until one or the other shuts down the connection.
775 FD_SET(csp->cfd, &rfds);
776 FD_SET(csp->sfd, &rfds);
778 n = select(maxfd+1, &rfds, NULL, NULL, NULL);
782 log_error(LOG_LEVEL_ERROR, "select() failed!: %E");
786 /* this is the body of the browser's request
787 * just read it and write it.
790 if (FD_ISSET(csp->cfd, &rfds))
792 n = read_socket(csp->cfd, buf, sizeof(buf));
796 break; /* "game over, man" */
799 if (write_socket(csp->sfd, buf, n) != n)
801 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
808 * The server wants to talk. It could be the header or the body.
809 * If `hdr' is null, then it's the header otherwise it's the body.
810 * FIXME: Does `hdr' really mean `host'? No.
814 if (FD_ISSET(csp->sfd, &rfds))
817 n = read_socket(csp->sfd, buf, sizeof(buf) - 1);
821 log_error(LOG_LEVEL_ERROR, "read from: %s failed: %E", http->host);
823 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 503 0",
824 csp->ip_addr_str, http->cmd);
826 rsp = error_response(csp, "connect-failed", errno);
830 if ((write_socket(csp->cfd, rsp->head, rsp->head_length) != rsp->head_length)
831 || (write_socket(csp->cfd, rsp->body, rsp->content_length) != rsp->content_length))
833 log_error(LOG_LEVEL_ERROR, "write to: %s failed: %E", http->host);
837 free_http_response(rsp);
841 /* Add a trailing zero. This lets filter_popups
842 * use string operations.
847 /* Filter the popups on this read. */
848 if (block_popups_now)
850 filter_popups(buf, n);
852 #endif /* def KILLPOPUPS */
854 /* Normally, this would indicate that we've read
855 * as much as the server has sent us and we can
856 * close the client connection. However, Microsoft
857 * in its wisdom has released IIS/5 with a bug that
858 * prevents it from sending the trailing \r\n in
859 * a 302 redirect header (and possibly other headers).
860 * To work around this if we've haven't parsed
861 * a full header we'll append a trailing \r\n
862 * and see if this now generates a valid one.
864 * This hack shouldn't have any impacts. If we've
865 * already transmitted the header or if this is a
866 * SSL connection, then we won't bother with this
867 * hack. So we only work on partially received
868 * headers. If we append a \r\n and this still
869 * doesn't generate a valid header, then we won't
870 * transmit anything to the client.
875 if (server_body || http->ssl)
878 * If we have been buffering up the document,
879 * now is the time to apply content modification
880 * and send the result to the client.
885 * If the content filter fails, use the original
887 * (see p != NULL ? p : csp->iob->cur below)
889 if (NULL == (p = (*content_filter)(csp)))
891 csp->content_length = csp->iob->eod - csp->iob->cur;
894 hdr = sed(server_patterns, add_server_headers, csp);
897 if ((write_socket(csp->cfd, hdr, n) != n)
898 || (write_socket(csp->cfd, p != NULL ? p : csp->iob->cur, csp->content_length) != csp->content_length))
900 log_error(LOG_LEVEL_CONNECT, "write modified content to client failed: %E");
908 break; /* "game over, man" */
912 * This is NOT the body, so
913 * Let's pretend the server just sent us a blank line.
915 n = sprintf(buf, "\r\n");
918 * Now, let the normal header parsing algorithm below do its
919 * job. If it fails, we'll exit instead of continuing.
926 * If this is an SSL connection or we're in the body
927 * of the server document, just write it to the client,
928 * unless we need to buffer the body for later content-filtering
931 if (server_body || http->ssl)
935 add_to_iob(csp, buf, n);
939 if (write_socket(csp->cfd, buf, n) != n)
941 log_error(LOG_LEVEL_ERROR, "write to client failed: %E");
950 /* we're still looking for the end of the
951 * server's header ... (does that make header
952 * parsing an "out of body experience" ?
955 /* buffer up the data we just read */
956 add_to_iob(csp, buf, n);
958 /* get header lines from the iob */
960 while ((p = get_header(csp)))
964 /* see following note */
967 enlist(csp->headers, p);
971 /* NOTE: there are no "empty" headers so
972 * if the pointer `p' is not NULL we must
973 * assume that we reached the end of the
974 * buffer before we hit the end of the header.
981 /* Well, we tried our MS IIS/5
982 * hack and it didn't work.
983 * The header is incomplete
984 * and there isn't anything
985 * we can do about it.
991 /* Since we have to wait for
992 * more from the server before
993 * we can parse the headers
994 * we just continue here.
1000 /* we have now received the entire header.
1001 * filter it and send the result to the client
1004 hdr = sed(server_patterns, add_server_headers, csp);
1007 /* write the server's (modified) header to
1008 * the client (along with anything else that
1009 * may be in the buffer)
1013 /* Start blocking popups if appropriate. */
1015 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1016 !http->ssl && /* We talk plaintext */
1017 block_popups) /* Policy allows */
1019 block_popups_now = 1;
1021 * Filter the part of the body that came in the same read
1022 * as the last headers:
1024 filter_popups(csp->iob->cur, csp->iob->eod - csp->iob->cur);
1027 #endif /* def KILLPOPUPS */
1029 /* Buffer and pcrs filter this if appropriate. */
1031 if ((csp->content_type & CT_TEXT) && /* It's a text / * MIME-Type */
1032 !http->ssl && /* We talk plaintext */
1033 pcrs_filter) /* Policy allows */
1035 content_filter = pcrs_filter_response;
1038 /* Buffer and gif_deanimate this if appropriate. */
1040 if ((csp->content_type & CT_GIF) && /* It's a image/gif MIME-Type */
1041 !http->ssl && /* We talk plaintext */
1042 gif_deanimate) /* Policy allows */
1044 content_filter = gif_deanimate_response;
1049 * Only write if we're not buffering for content modification
1051 if (!content_filter && ((write_socket(csp->cfd, hdr, n) != n)
1052 || (n = flush_socket(csp->cfd, csp) < 0)))
1054 log_error(LOG_LEVEL_CONNECT, "write header to client failed: %E");
1056 /* the write failed, so don't bother
1057 * mentioning it to the client...
1058 * it probably can't hear us anyway.
1064 !content_filter && (byte_count += n);
1066 /* we're finished with the server's header */
1071 /* If this was a MS IIS/5 hack then it means
1072 * the server has already closed the
1073 * connection. Nothing more to read. Time
1084 return; /* huh? we should never get here */
1087 log_error(LOG_LEVEL_CLF, "%s - - [%T] \"%s\" 200 %d",
1088 csp->ip_addr_str, http->cmd, byte_count);
1092 /*********************************************************************
1096 * Description : This is little more than chat. We only "serve" to
1097 * to close any socket that chat may have opened.
1100 * 1 : csp = Current client state (buffers, headers, etc...)
1104 *********************************************************************/
1106 void serve(struct client_state *csp)
1107 #else /* ifndef AMIGA */
1108 static void serve(struct client_state *csp)
1109 #endif /* def AMIGA */
1112 close_socket(csp->cfd);
1116 close_socket(csp->sfd);
1125 /*********************************************************************
1127 * Function : server_thread
1129 * Description : We only exist to call `serve' in a threaded environment.
1132 * 1 : data = Current client state (buffers, headers, etc...)
1134 * Returns : Always 0.
1136 *********************************************************************/
1137 static int32 server_thread(void *data)
1139 serve((struct client_state *) data);
1146 /*********************************************************************
1150 * Description : Load the config file and start the listen loop.
1151 * This function is a lot more *sane* with the `load_config'
1152 * and `listen_loop' functions; although it stills does
1153 * a *little* too much for my taste.
1156 * 1 : argc = Number of parameters (including $0).
1157 * 2 : argv = Array of (char *)'s to the parameters.
1159 * Returns : 1 if : can't open config file, unrecognized directive,
1160 * stats requested in multi-thread mode, can't open the
1161 * log file, can't open the jar file, listen port is invalid,
1162 * any load fails, and can't bind port.
1164 * Else main never returns, the process must be signaled
1165 * to terminate execution. Or, on Windows, use the
1166 * "File", "Exit" menu option.
1168 *********************************************************************/
1170 int _main(int argc, const char *argv[])
1172 int main(int argc, const char *argv[])
1177 "AmiTCP:db/junkbuster/config"
1178 #elif !defined(_WIN32)
1185 #if !defined(_WIN32) || defined(_WIN_CONSOLE)
1186 if ((argc >= 2) && (strcmp(argv[1], "--help")==0))
1188 printf("JunkBuster proxy version " VERSION ".\n\n"
1189 "Usage: %s [configfile]\n\n"
1190 "See " HOME_PAGE_URL " for details.\n"
1191 "This program is distributed under the GNU GPL, version 2 or later.\n",
1195 if ((argc >= 2) && (strcmp(argv[1], "--version")==0))
1197 printf(VERSION "\n");
1200 #endif /* !defined(_WIN32) || defined(_WIN_CONSOLE) */
1207 configfile = argv[1];
1214 #elif defined(_WIN32)
1220 signal(SIGPIPE, SIG_IGN);
1221 signal(SIGCHLD, SIG_IGN);
1223 #else /* ifdef _WIN32 */
1224 # ifdef _WIN_CONSOLE
1226 * We *are* in a windows console app.
1227 * Print a verbose messages about FAQ's and such
1229 printf(win32_blurb);
1230 # endif /* def _WIN_CONSOLE */
1231 #endif /* def _WIN32 */
1242 /*********************************************************************
1244 * Function : listen_loop
1246 * Description : bind the listen port and enter a "FOREVER" listening loop.
1252 *********************************************************************/
1253 static void listen_loop(void)
1255 struct client_state *csp = NULL;
1257 struct configuration_spec * config;
1259 config = load_config();
1261 log_error(LOG_LEVEL_CONNECT, "bind (%s, %d)",
1262 config->haddr ? config->haddr : "INADDR_ANY", config->hport);
1264 bfd = bind_port(config->haddr, config->hport);
1268 log_error(LOG_LEVEL_FATAL, "can't bind %s:%d: %E "
1269 "- There may be another junkbuster or some other "
1270 "proxy running on port %d",
1271 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
1272 config->hport, config->hport
1274 /* shouldn't get here */
1278 config->need_bind = 0;
1283 #if !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA)
1284 while (waitpid(-1, NULL, WNOHANG) > 0)
1286 /* zombie children */
1288 #endif /* !defined(FEATURE_PTHREAD) && !defined(_WIN32) && !defined(__BEOS__) && !defined(AMIGA) */
1291 if ( NULL == (csp = (struct client_state *) zalloc(sizeof(*csp))) )
1293 log_error(LOG_LEVEL_FATAL, "malloc(%d) for csp failed: %E", sizeof(*csp));
1297 memset(csp, '\0', sizeof(*csp));
1302 csp->config = config = load_config();
1304 if ( config->need_bind )
1307 * Since we were listening to the "old port", we will not see
1308 * a "listen" param change until the next IJB request. So, at
1309 * least 1 more request must be made for us to find the new
1310 * setting. I am simply closing the old socket and binding the
1313 * Which-ever is correct, we will serve 1 more page via the
1314 * old settings. This should probably be a "show-proxy-args"
1315 * request. This should not be a so common of an operation
1316 * that this will hurt people's feelings.
1321 log_error(LOG_LEVEL_CONNECT, "bind (%s, %d)",
1322 config->haddr ? config->haddr : "INADDR_ANY", config->hport);
1323 bfd = bind_port(config->haddr, config->hport);
1327 log_error(LOG_LEVEL_FATAL, "can't bind %s:%d: %E "
1328 "- There may be another junkbuster or some other "
1329 "proxy running on port %d",
1330 (NULL != config->haddr) ? config->haddr : "INADDR_ANY",
1331 config->hport, config->hport
1333 /* shouldn't get here */
1337 config->need_bind = 0;
1340 log_error(LOG_LEVEL_CONNECT, "accept connection ... ");
1342 if (!accept_connection(csp, bfd))
1344 log_error(LOG_LEVEL_CONNECT, "accept failed: %E");
1357 log_error(LOG_LEVEL_CONNECT, "OK");
1361 /* by haroon - most of credit to srt19170 */
1362 csp->toggled_on = g_bToggleIJB;
1365 if (run_loader(csp))
1367 log_error(LOG_LEVEL_FATAL, "a loader failed - must exit");
1368 /* Never get here - LOG_LEVEL_FATAL causes program exit */
1372 if (block_acl(NULL,csp))
1374 log_error(LOG_LEVEL_CONNECT, "Connection dropped due to ACL");
1375 close_socket(csp->cfd);
1379 #endif /* def ACL_FILES */
1381 /* add it to the list of clients */
1382 csp->next = clients->next;
1383 clients->next = csp;
1385 if (config->multi_threaded)
1389 /* this is a switch () statment in the C preprocessor - ugh */
1390 #undef SELECTED_ONE_OPTION
1392 /* Use Pthreads in preference to native code */
1393 #if defined(FEATURE_PTHREAD) && !defined(SELECTED_ONE_OPTION)
1394 #define SELECTED_ONE_OPTION
1396 pthread_t the_thread;
1397 pthread_attr_t attrs;
1399 pthread_attr_init(&attrs);
1400 pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
1401 child_id = (pthread_create(&the_thread, &attrs,
1402 (void*)serve, csp) ? -1 : 0);
1403 pthread_attr_destroy(&attrs);
1407 #if defined(_WIN32) && !defined(_CYGWIN) && !defined(SELECTED_ONE_OPTION)
1408 #define SELECTED_ONE_OPTION
1409 child_id = _beginthread(
1415 #if defined(__BEOS__) && !defined(SELECTED_ONE_OPTION)
1416 #define SELECTED_ONE_OPTION
1418 thread_id tid = spawn_thread
1419 (server_thread, "server", B_NORMAL_PRIORITY, csp);
1421 if ((tid >= 0) && (resume_thread(tid) == B_OK))
1423 child_id = (int) tid;
1432 #if defined(AMIGA) && !defined(SELECTED_ONE_OPTION)
1433 #define SELECTED_ONE_OPTION
1434 csp->cfd = ReleaseSocket(csp->cfd, -1);
1435 if((child_id = (int)CreateNewProcTags(
1436 NP_Entry, (ULONG)server_thread,
1437 NP_Output, Output(),
1438 NP_CloseOutput, FALSE,
1439 NP_Name, (ULONG)"junkbuster child",
1440 NP_StackSize, 200*1024,
1444 ((struct Task *)child_id)->tc_UserData = csp;
1445 Signal((struct Task *)child_id, SIGF_SINGLE);
1450 #if !defined(SELECTED_ONE_OPTION)
1453 /* This block is only needed when using fork().
1454 * When using threads, the server thread was
1455 * created and run by the call to _beginthread().
1457 if (child_id == 0) /* child */
1463 else if (child_id > 0) /* parent */
1465 /* in a fork()'d environment, the parent's
1466 * copy of the client socket and the CSP
1470 #if !defined(_WIN32) && defined(__CYGWIN__)
1472 #endif /* !defined(_WIN32) && defined(__CYGWIN__) */
1473 close_socket(csp->cfd);
1478 #undef SELECTED_ONE_OPTION
1479 /* end of cpp switch () */
1481 if (child_id < 0) /* failed */
1483 char buf[BUFFER_SIZE];
1485 log_error(LOG_LEVEL_ERROR, "can't fork: %E");
1487 sprintf(buf , "JunkBuster: can't fork: errno = %d", errno);
1489 write_socket(csp->cfd, buf, strlen(buf));
1490 close_socket(csp->cfd);