3 #define FILTERS_H_VERSION "$Id: filters.h,v 1.4 2001/05/26 15:26:15 jongfoster Exp $"
4 /*********************************************************************
6 * File : $Source: /cvsroot/ijbswa/current/filters.h,v $
8 * Purpose : Declares functions to parse/crunch headers and pages.
9 * Functions declared include:
10 * `acl_addr', `add_stats', `block_acl', `block_imageurl',
11 * `block_url', `url_permissions', `domaincmp', `dsplit',
12 * `filter_popups', `forward_url'
13 * `ij_untrusted_url', `intercept_url', `re_process_buffer',
14 * `show_proxy_args', and `trust_url'
16 * Copyright : Written by and Copyright (C) 2001 the SourceForge
17 * IJBSWA team. http://ijbswa.sourceforge.net
19 * Based on the Internet Junkbuster originally written
20 * by and Copyright (C) 1997 Anonymous Coders and
21 * Junkbusters Corporation. http://www.junkbusters.com
23 * This program is free software; you can redistribute it
24 * and/or modify it under the terms of the GNU General
25 * Public License as published by the Free Software
26 * Foundation; either version 2 of the License, or (at
27 * your option) any later version.
29 * This program is distributed in the hope that it will
30 * be useful, but WITHOUT ANY WARRANTY; without even the
31 * implied warranty of MERCHANTABILITY or FITNESS FOR A
32 * PARTICULAR PURPOSE. See the GNU General Public
33 * License for more details.
35 * The GNU General Public License should be included with
36 * this file. If not, you can view it at
37 * http://www.gnu.org/copyleft/gpl.html
38 * or write to the Free Software Foundation, Inc., 59
39 * Temple Place - Suite 330, Boston, MA 02111-1307, USA.
43 * Revision 1.4 2001/05/26 15:26:15 jongfoster
44 * ACL feature now provides more security by immediately dropping
45 * connections from untrusted hosts.
47 * Revision 1.3 2001/05/22 18:46:04 oes
49 * - Enabled filtering banners by size rather than URL
50 * by adding patterns that replace all standard banner
51 * sizes with the "Junkbuster" gif to the re_filterfile
53 * - Enabled filtering WebBugs by providing a pattern
54 * which kills all 1x1 images
56 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
57 * which is selected by the (nonstandard and therefore
58 * capital) letter 'U' in the option string.
59 * It causes the quantifiers to be ungreedy by default.
60 * Appending a ? turns back to greedy (!).
62 * - Added a new interceptor ijb-send-banner, which
63 * sends back the "Junkbuster" gif. Without imagelist or
64 * MSIE detection support, or if tinygif = 1, or the
65 * URL isn't recognized as an imageurl, a lame HTML
66 * explanation is sent instead.
68 * - Added new feature, which permits blocking remote
69 * script redirects and firing back a local redirect
71 * The feature is conditionally compiled, i.e. it
72 * can be disabled with --disable-fast-redirects,
73 * plus it must be activated by a "fast-redirects"
74 * line in the config file, has its own log level
75 * and of course wants to be displayed by show-proxy-args
76 * Note: Boy, all the #ifdefs in 1001 locations and
77 * all the fumbling with configure.in and acconfig.h
78 * were *way* more work than the feature itself :-(
80 * - Because a generic redirect template was needed for
81 * this, tinygif = 3 now uses the same.
83 * - Moved GIFs, and other static HTTP response templates
88 * - Removed some >400 CRs again (Jon, you really worked
91 * Revision 1.2 2001/05/20 01:21:20 jongfoster
92 * Version 2.9.4 checkin.
93 * - Merged popupfile and cookiefile, and added control over PCRS
94 * filtering, in new "permissionsfile".
95 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
96 * file error you now get a message box (in the Win32 GUI) rather
97 * than the program exiting with no explanation.
98 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
100 * - Removed tabs from "config"
101 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
102 * - Bumped up version number.
104 * Revision 1.1.1.1 2001/05/15 13:58:52 oes
105 * Initial import of version 2.9.3 source tree
108 *********************************************************************/
118 extern int block_acl(struct access_control_addr *dst, struct client_state *csp);
119 extern int acl_addr(char *aspec, struct access_control_addr *aca);
120 #endif /* def ACL_FILES */
122 extern char *block_url(struct http_request *http, struct client_state *csp);
124 extern char *trust_url(struct http_request *http, struct client_state *csp);
125 #endif /* def TRUST_FILES */
126 extern char *intercept_url(struct http_request *http, struct client_state *csp);
127 extern char *redirect_url(struct http_request *http, struct client_state *csp);
129 #if defined(DETECT_MSIE_IMAGES) || defined(USE_IMAGE_LIST)
130 extern int block_imageurl(struct http_request *http, struct client_state *csp);
131 #endif /* defined(DETECT_MSIE_IMAGES) || defined(USE_IMAGE_LIST) */
133 #ifdef USE_IMAGE_LIST
134 extern int block_imageurl_using_imagelist(struct http_request *http, struct client_state *csp);
135 #endif /* def USE_IMAGE_LIST */
137 extern int url_permissions(struct http_request *http, struct client_state *csp);
138 extern const struct gateway *forward_url(struct http_request *http, struct client_state *csp);
140 extern struct url_spec dsplit(char *domain);
141 extern int domaincmp(struct url_spec *pattern, struct url_spec *fqdn);
143 extern char *show_proxy_args(struct http_request *http, struct client_state *csp);
144 extern char *ijb_send_banner(struct http_request *http, struct client_state *csp);
147 extern char *ij_untrusted_url(struct http_request *http, struct client_state *csp);
148 #endif /* def TRUST_FILES */
151 extern char *add_stats(char *s);
152 #endif /* def STATISTICS */
155 extern char *re_process_buffer(struct client_state *csp);
156 #endif /* def PCRS */
158 /* Revision control strings from this header and associated .c file */
159 extern const char filters_rcs[];
160 extern const char filters_h_rcs[];
166 #endif /* ndef _FILTERS_H */