3 #define FILTERS_H_VERSION "$Id: filters.h,v 1.8 2001/06/03 19:12:00 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_actions', `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 1.8 2001/06/03 19:12:00 oes
44 * extracted-CGI relevant stuff
46 * Revision 1.8 2001/06/03 11:03:48 oes
53 * adapted to new enlist_unique arg format
57 * introduced confdir option
59 * filters.c filtrers.h
61 * extracted-CGI relevant stuff
69 * support for new cgi mechansim
73 * functions for new list type: "map"
74 * extended enlist_unique
81 * deleted const struct interceptors
89 * added struct http_response
90 * changes struct interceptors to struct cgi_dispatcher
91 * moved HTML stuff to cgi.h
100 * Revision 1.7 2001/05/31 21:21:30 jongfoster
101 * Permissionsfile / actions file changes:
102 * - Changed "permission" to "action" throughout
103 * - changes to file format to allow string parameters
104 * - Moved helper functions to actions.c
106 * Revision 1.6 2001/05/29 09:50:24 jongfoster
107 * Unified blocklist/imagelist/permissionslist.
108 * File format is still under discussion, but the internal changes
111 * Also modified interceptor behaviour:
112 * - We now intercept all URLs beginning with one of the following
113 * prefixes (and *only* these prefixes):
115 * * http://ijbswa.sf.net/config/
116 * * http://ijbswa.sourceforge.net/config/
117 * - New interceptors "home page" - go to http://i.j.b/ to see it.
118 * - Internal changes so that intercepted and fast redirect pages
119 * are not replaced with an image.
120 * - Interceptors now have the option to send a binary page direct
121 * to the client. (i.e. ijb-send-banner uses this)
122 * - Implemented show-url-info interceptor. (Which is why I needed
123 * the above interceptors changes - a typical URL is
124 * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
125 * The previous mechanism would not have intercepted that, and
126 * if it had been intercepted then it then it would have replaced
129 * Revision 1.5 2001/05/27 22:17:04 oes
131 * - re_process_buffer no longer writes the modified buffer
132 * to the client, which was very ugly. It now returns the
133 * buffer, which it is then written by chat.
135 * - content_length now adjusts the Content-Length: header
136 * for modified documents rather than crunch()ing it.
137 * (Length info in csp->content_length, which is 0 for
138 * unmodified documents)
140 * - For this to work, sed() is called twice when filtering.
142 * Revision 1.4 2001/05/26 15:26:15 jongfoster
143 * ACL feature now provides more security by immediately dropping
144 * connections from untrusted hosts.
146 * Revision 1.3 2001/05/22 18:46:04 oes
148 * - Enabled filtering banners by size rather than URL
149 * by adding patterns that replace all standard banner
150 * sizes with the "Junkbuster" gif to the re_filterfile
152 * - Enabled filtering WebBugs by providing a pattern
153 * which kills all 1x1 images
155 * - Added support for PCRE_UNGREEDY behaviour to pcrs,
156 * which is selected by the (nonstandard and therefore
157 * capital) letter 'U' in the option string.
158 * It causes the quantifiers to be ungreedy by default.
159 * Appending a ? turns back to greedy (!).
161 * - Added a new interceptor ijb-send-banner, which
162 * sends back the "Junkbuster" gif. Without imagelist or
163 * MSIE detection support, or if tinygif = 1, or the
164 * URL isn't recognized as an imageurl, a lame HTML
165 * explanation is sent instead.
167 * - Added new feature, which permits blocking remote
168 * script redirects and firing back a local redirect
170 * The feature is conditionally compiled, i.e. it
171 * can be disabled with --disable-fast-redirects,
172 * plus it must be activated by a "fast-redirects"
173 * line in the config file, has its own log level
174 * and of course wants to be displayed by show-proxy-args
175 * Note: Boy, all the #ifdefs in 1001 locations and
176 * all the fumbling with configure.in and acconfig.h
177 * were *way* more work than the feature itself :-(
179 * - Because a generic redirect template was needed for
180 * this, tinygif = 3 now uses the same.
182 * - Moved GIFs, and other static HTTP response templates
187 * - Removed some >400 CRs again (Jon, you really worked
190 * Revision 1.2 2001/05/20 01:21:20 jongfoster
191 * Version 2.9.4 checkin.
192 * - Merged popupfile and cookiefile, and added control over PCRS
193 * filtering, in new "permissionsfile".
194 * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
195 * file error you now get a message box (in the Win32 GUI) rather
196 * than the program exiting with no explanation.
197 * - Made killpopup use the PCRS MIME-type checking and HTTP-header
199 * - Removed tabs from "config"
200 * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
201 * - Bumped up version number.
203 * Revision 1.1.1.1 2001/05/15 13:58:52 oes
204 * Initial import of version 2.9.3 source tree
207 *********************************************************************/
217 extern int block_acl(struct access_control_addr *dst, struct client_state *csp);
218 extern int acl_addr(char *aspec, struct access_control_addr *aca);
219 #endif /* def ACL_FILES */
221 extern char *block_url(struct http_request *http, struct client_state *csp);
223 extern char *trust_url(struct http_request *http, struct client_state *csp);
224 #endif /* def TRUST_FILES */
225 #ifdef IMAGE_BLOCKING
226 extern int block_imageurl(struct http_request *http, struct client_state *csp);
227 #endif /* def IMAGE_BLOCKING */
229 extern void url_actions(struct http_request *http,
230 struct client_state *csp);
231 extern void apply_url_actions(struct current_action_spec *action,
232 struct http_request *http,
233 struct url_actions *b);
235 extern const struct forward_spec *forward_url(struct http_request *http, struct client_state *csp);
237 extern struct url_spec dsplit(char *domain);
238 extern int domaincmp(struct url_spec *pattern, struct url_spec *fqdn);
241 extern char *re_process_buffer(struct client_state *csp);
242 #endif /* def PCRS */
244 /* Revision control strings from this header and associated .c file */
245 extern const char filters_rcs[];
246 extern const char filters_h_rcs[];
252 #endif /* ndef _FILTERS_H */