#ifndef FILTERS_H_INCLUDED
#define FILTERS_H_INCLUDED
-#define FILTERS_H_VERSION "$Id: filters.h,v 1.15 2001/10/10 16:44:16 oes Exp $"
/*********************************************************************
*
* File : $Source: /cvsroot/ijbswa/current/filters.h,v $
*
* Purpose : Declares functions to parse/crunch headers and pages.
- * Functions declared include:
- * `acl_addr', `add_stats', `block_acl', `block_imageurl',
- * `block_url', `url_actions', `filter_popups', `forward_url'
- * `ij_untrusted_url', `intercept_url', `re_process_buffer',
- * `show_proxy_args', and `trust_url'
*
- * Copyright : Written by and Copyright (C) 2001 the SourceForge
- * IJBSWA team. http://ijbswa.sourceforge.net
+ * Copyright : Written by and Copyright (C) 2001-2010 the
+ * Privoxy team. https://www.privoxy.org/
*
* Based on the Internet Junkbuster originally written
- * by and Copyright (C) 1997 Anonymous Coders and
+ * by and Copyright (C) 1997 Anonymous Coders and
* Junkbusters Corporation. http://www.junkbusters.com
*
- * This program is free software; you can redistribute it
+ * This program is free software; you can redistribute it
* and/or modify it under the terms of the GNU General
* Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at
* or write to the Free Software Foundation, Inc., 59
* Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
- * Revisions :
- * $Log: filters.h,v $
- * Revision 1.15 2001/10/10 16:44:16 oes
- * Added match_portlist function
- *
- * Revision 1.14 2001/10/07 15:41:40 oes
- * Added prototype for remove_chunked_transfer_coding
- *
- * Revision 1.13 2001/07/30 22:08:36 jongfoster
- * Tidying up #defines:
- * - All feature #defines are now of the form FEATURE_xxx
- * - Permanently turned off WIN_GUI_EDIT
- * - Permanently turned on WEBDAV and SPLIT_PROXY_ARGS
- *
- * Revision 1.12 2001/07/29 19:01:11 jongfoster
- * Changed _FILENAME_H to FILENAME_H_INCLUDED.
- * Added forward declarations for needed structures.
- *
- * Revision 1.11 2001/07/13 14:00:18 oes
- * - Introduced gif_deanimate_response
- * - Renamed re_process_buffer to pcrs_filter_response
- * - Removed all #ifdef PCRS
- *
- * Revision 1.10 2001/06/29 13:29:01 oes
- * Cleaned up and updated to reflect the changesin
- * filters.c
- *
- * Revision 1.9 2001/06/07 23:10:53 jongfoster
- * Replacing struct gateway with struct forward_spec
- *
- * Revision 1.8 2001/06/03 19:12:00 oes
- * extracted-CGI relevant stuff
- *
- * Revision 1.7 2001/05/31 21:21:30 jongfoster
- * Permissionsfile / actions file changes:
- * - Changed "permission" to "action" throughout
- * - changes to file format to allow string parameters
- * - Moved helper functions to actions.c
- *
- * Revision 1.6 2001/05/29 09:50:24 jongfoster
- * Unified blocklist/imagelist/permissionslist.
- * File format is still under discussion, but the internal changes
- * are (mostly) done.
- *
- * Also modified interceptor behaviour:
- * - We now intercept all URLs beginning with one of the following
- * prefixes (and *only* these prefixes):
- * * http://i.j.b/
- * * http://ijbswa.sf.net/config/
- * * http://ijbswa.sourceforge.net/config/
- * - New interceptors "home page" - go to http://i.j.b/ to see it.
- * - Internal changes so that intercepted and fast redirect pages
- * are not replaced with an image.
- * - Interceptors now have the option to send a binary page direct
- * to the client. (i.e. ijb-send-banner uses this)
- * - Implemented show-url-info interceptor. (Which is why I needed
- * the above interceptors changes - a typical URL is
- * "http://i.j.b/show-url-info?url=www.somesite.com/banner.gif".
- * The previous mechanism would not have intercepted that, and
- * if it had been intercepted then it then it would have replaced
- * it with an image.)
- *
- * Revision 1.5 2001/05/27 22:17:04 oes
- *
- * - re_process_buffer no longer writes the modified buffer
- * to the client, which was very ugly. It now returns the
- * buffer, which it is then written by chat.
- *
- * - content_length now adjusts the Content-Length: header
- * for modified documents rather than crunch()ing it.
- * (Length info in csp->content_length, which is 0 for
- * unmodified documents)
- *
- * - For this to work, sed() is called twice when filtering.
- *
- * Revision 1.4 2001/05/26 15:26:15 jongfoster
- * ACL feature now provides more security by immediately dropping
- * connections from untrusted hosts.
- *
- * Revision 1.3 2001/05/22 18:46:04 oes
- *
- * - Enabled filtering banners by size rather than URL
- * by adding patterns that replace all standard banner
- * sizes with the "Junkbuster" gif to the re_filterfile
- *
- * - Enabled filtering WebBugs by providing a pattern
- * which kills all 1x1 images
- *
- * - Added support for PCRE_UNGREEDY behaviour to pcrs,
- * which is selected by the (nonstandard and therefore
- * capital) letter 'U' in the option string.
- * It causes the quantifiers to be ungreedy by default.
- * Appending a ? turns back to greedy (!).
- *
- * - Added a new interceptor ijb-send-banner, which
- * sends back the "Junkbuster" gif. Without imagelist or
- * MSIE detection support, or if tinygif = 1, or the
- * URL isn't recognized as an imageurl, a lame HTML
- * explanation is sent instead.
- *
- * - Added new feature, which permits blocking remote
- * script redirects and firing back a local redirect
- * to the browser.
- * The feature is conditionally compiled, i.e. it
- * can be disabled with --disable-fast-redirects,
- * plus it must be activated by a "fast-redirects"
- * line in the config file, has its own log level
- * and of course wants to be displayed by show-proxy-args
- * Note: Boy, all the #ifdefs in 1001 locations and
- * all the fumbling with configure.in and acconfig.h
- * were *way* more work than the feature itself :-(
- *
- * - Because a generic redirect template was needed for
- * this, tinygif = 3 now uses the same.
- *
- * - Moved GIFs, and other static HTTP response templates
- * to project.h
- *
- * - Some minor fixes
- *
- * - Removed some >400 CRs again (Jon, you really worked
- * a lot! ;-)
- *
- * Revision 1.2 2001/05/20 01:21:20 jongfoster
- * Version 2.9.4 checkin.
- * - Merged popupfile and cookiefile, and added control over PCRS
- * filtering, in new "permissionsfile".
- * - Implemented LOG_LEVEL_FATAL, so that if there is a configuration
- * file error you now get a message box (in the Win32 GUI) rather
- * than the program exiting with no explanation.
- * - Made killpopup use the PCRS MIME-type checking and HTTP-header
- * skipping.
- * - Removed tabs from "config"
- * - Moved duplicated url parsing code in "loaders.c" to a new funcition.
- * - Bumped up version number.
- *
- * Revision 1.1.1.1 2001/05/15 13:58:52 oes
- * Initial import of version 2.9.3 source tree
- *
- *
*********************************************************************/
-\f
-
-#include "project.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-struct access_control_addr;
-struct client_state;
-struct http_request;
-struct http_response;
-struct current_action_spec;
-struct url_actions;
-struct url_spec;
-
+#include "project.h"
/*
* ACL checking
*/
#ifdef FEATURE_ACL
-extern int block_acl(struct access_control_addr *dst, struct client_state *csp);
-extern int acl_addr(char *aspec, struct access_control_addr *aca);
+extern int block_acl(const struct access_control_addr *dst, const struct client_state *csp);
+extern int acl_addr(const char *aspec, struct access_control_addr *aca);
#endif /* def FEATURE_ACL */
-extern int match_portlist(const char *portlist, int port);
/*
* Interceptors
*/
extern struct http_response *block_url(struct client_state *csp);
extern struct http_response *redirect_url(struct client_state *csp);
-#ifdef FEATURE_COOKIE_JAR
+#ifdef FEATURE_TRUST
extern struct http_response *trust_url(struct client_state *csp);
-#endif /* def FEATURE_COOKIE_JAR */
+#endif /* def FEATURE_TRUST */
/*
* Request inspectors
*/
-#ifdef FEATURE_COOKIE_JAR
-extern int is_untrusted_url(struct client_state *csp);
-#endif /* def FEATURE_COOKIE_JAR */
+#ifdef FEATURE_TRUST
+extern int is_untrusted_url(const struct client_state *csp);
+#endif /* def FEATURE_TRUST */
#ifdef FEATURE_IMAGE_BLOCKING
-extern int is_imageurl(struct client_state *csp);
+extern int is_imageurl(const struct client_state *csp);
#endif /* def FEATURE_IMAGE_BLOCKING */
+extern int connect_port_is_forbidden(const struct client_state *csp);
/*
* Determining applicable actions
*/
-extern void url_actions(struct http_request *http,
- struct client_state *csp);
-extern void apply_url_actions(struct current_action_spec *action,
- struct http_request *http,
- struct url_actions *b);
+extern void get_url_actions(struct client_state *csp,
+ struct http_request *http);
+
+extern struct re_filterfile_spec *get_filter(const struct client_state *csp,
+ const char *requested_name,
+ enum filter_type requested_type);
+
/*
* Determining parent proxies
*/
-extern const struct forward_spec *forward_url(struct http_request *http, struct client_state *csp);
+extern const struct forward_spec *forward_url(struct client_state *csp,
+ const struct http_request *http);
/*
* Content modification
*/
-extern char *pcrs_filter_response(struct client_state *csp);
-extern char *gif_deanimate_response(struct client_state *csp);
-extern int remove_chunked_transfer_coding(char *buffer, const size_t size);
+extern char *execute_content_filters(struct client_state *csp);
+extern char *execute_single_pcrs_command(char *subject, const char *pcrs_command, int *hits);
+extern char *rewrite_url(char *old_url, const char *pcrs_command);
+extern char *get_last_url(char *subject, const char *redirect_mode);
+
+extern pcrs_job *compile_dynamic_pcrs_job_list(const struct client_state *csp, const struct re_filterfile_spec *b);
-/*
- * Revision control strings from this header and associated .c file
+extern int content_requires_filtering(struct client_state *csp);
+extern int content_filters_enabled(const struct current_action_spec *action);
+extern int filters_available(const struct client_state *csp);
+
+/*
+ * Handling Max-Forwards:
*/
-extern const char filters_rcs[];
-extern const char filters_h_rcs[];
+extern struct http_response *direct_response(struct client_state *csp);
+
+#ifdef FUZZ
+extern char *gif_deanimate_response(struct client_state *csp);
+extern jb_err remove_chunked_transfer_coding(char *buffer, size_t *size);
+#endif
-#ifdef __cplusplus
-} /* extern "C" */
+#ifdef FEATURE_EXTENDED_STATISTICS
+extern void register_filter_for_statistics(const char *filter);
+extern void update_filter_statistics(const char *filter, int hits);
+extern void get_filter_statistics(const char *filter,
+ unsigned long long *executions,
+ unsigned long long *pages_modified,
+ unsigned long long *hits);
#endif
#endif /* ndef FILTERS_H_INCLUDED */
projects / privoxy.git / blobdiff