3 #define FILTERS_H_VERSION "$Id: filters.h,v 1.5 2001/05/27 22:17:04 oes 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 1.5 2001/05/27 22:17:04 oes
45 * - re_process_buffer no longer writes the modified buffer
46 * to the client, which was very ugly. It now returns the
47 * buffer, which it is then written by chat.
49 * - content_length now adjusts the Content-Length: header
50 * for modified documents rather than crunch()ing it.
51 * (Length info in csp->content_length, which is 0 for
52 * unmodified documents)
54 * - For this to work, sed() is called twice when filtering.
56 * Revision 1.4 2001/05/26 15:26:15 jongfoster
57 * ACL feature now provides more security by immediately dropping
58 * connections from untrusted hosts.
60 * Revision 1.3 2001/05/22 18:46:04 oes
62 * - Enabled filtering banners by size rather than URL
63 * by adding patterns that replace all standard banner
64 * sizes with the "Junkbuster" gif to the re_filterfile
66 * - Enabled filtering WebBugs by providing a pattern
67 * which kills all 1x1 images
69 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
70 * which is selected by the (nonstandard and therefore
71 * capital) letter 'U' in the option string.
72 * It causes the quantifiers to be ungreedy by default.
73 * Appending a ? turns back to greedy (!).
75 * - Added a new interceptor ijb-send-banner, which
76 * sends back the "Junkbuster" gif. Without imagelist or
77 * MSIE detection support, or if tinygif = 1, or the
78 * URL isn't recognized as an imageurl, a lame HTML
79 * explanation is sent instead.
81 * - Added new feature, which permits blocking remote
82 * script redirects and firing back a local redirect
84 * The feature is conditionally compiled, i.e. it
85 * can be disabled with --disable-fast-redirects,
86 * plus it must be activated by a "fast-redirects"
87 * line in the config file, has its own log level
88 * and of course wants to be displayed by show-proxy-args
89 * Note: Boy, all the #ifdefs in 1001 locations and
90 * all the fumbling with configure.in and acconfig.h
91 * were *way* more work than the feature itself :-(
93 * - Because a generic redirect template was needed for
94 * this, tinygif = 3 now uses the same.
96 * - Moved GIFs, and other static HTTP response templates
101 * - Removed some >400 CRs again (Jon, you really worked
104 * Revision 1.2 2001/05/20 01:21:20 jongfoster
105 * Version 2.9.4 checkin.
106 * - Merged popupfile and cookiefile, and added control over PCRS
107 * filtering, in new "permissionsfile".
108 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
109 * file error you now get a message box (in the Win32 GUI) rather
110 * than the program exiting with no explanation.
111 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
113 * - Removed tabs from "config"
114 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
115 * - Bumped up version number.
117 * Revision 1.1.1.1 2001/05/15 13:58:52 oes
118 * Initial import of version 2.9.3 source tree
121 *********************************************************************/
131 extern int block_acl(struct access_control_addr *dst, struct client_state *csp);
132 extern int acl_addr(char *aspec, struct access_control_addr *aca);
133 #endif /* def ACL_FILES */
135 extern char *block_url(struct http_request *http, struct client_state *csp);
137 extern char *trust_url(struct http_request *http, struct client_state *csp);
138 #endif /* def TRUST_FILES */
139 extern int intercept_url(struct http_request *http, struct client_state *csp);
140 extern char *redirect_url(struct http_request *http, struct client_state *csp);
142 #ifdef IMAGE_BLOCKING
143 extern int block_imageurl(struct http_request *http, struct client_state *csp);
144 #endif /* def IMAGE_BLOCKING */
146 extern int url_permissions(struct http_request *http, struct client_state *csp);
147 extern const struct gateway *forward_url(struct http_request *http, struct client_state *csp);
149 extern struct url_spec dsplit(char *domain);
150 extern int domaincmp(struct url_spec *pattern, struct url_spec *fqdn);
152 extern char *show_proxy_args(struct http_request *http, struct client_state *csp);
153 extern char *ijb_send_banner(struct http_request *http, struct client_state *csp);
156 extern char *ij_untrusted_url(struct http_request *http, struct client_state *csp);
157 #endif /* def TRUST_FILES */
159 char *ijb_show_url_info(struct http_request *http, struct client_state *csp);
162 extern char *add_stats(char *s);
163 #endif /* def STATISTICS */
166 extern char *re_process_buffer(struct client_state *csp);
167 #endif /* def PCRS */
169 /* Revision control strings from this header and associated .c file */
170 extern const char filters_rcs[];
171 extern const char filters_h_rcs[];
177 #endif /* ndef _FILTERS_H */