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