1 /*-
2  * Copyright (c) 2006 Robert N. M. Watson
3  * All rights reserved.
4  *
5  * This software was developed by Robert Watson for the TrustedBSD Project.
6  *
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 1. Redistributions of source code must retain the above copyright
11  *    notice, this list of conditions and the following disclaimer.
12  * 2. Redistributions in binary form must reproduce the above copyright
13  *    notice, this list of conditions and the following disclaimer in the
14  *    documentation and/or other materials provided with the distribution.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26  * SUCH DAMAGE.
27  */
28 
29 #define	AUDITFILTERD_CONFFILE	"/etc/security/audit_filter"
30 #define	AUDITFILTERD_PIPEFILE	"/dev/auditpipe"
31 
32 /*
33  * Limit on the number of arguments that can appear in an audit_filterd
34  * configuration line.
35  */
36 #define	AUDITFILTERD_CONF_MAXARGS	256
37 
38 /*
39  * Data structure description each instantiated module.
40  */
41 struct auditfilter_module {
42 	/*
43 	 * Fields from configuration file and dynamic linker.
44 	 */
45 	char						*am_modulename;
46 	char						*am_arg_buffer;
47 	int						 am_argc;
48 	char						**am_argv;
49 	void						*am_dlhandle;
50 
51 	/*
52 	 * Fields provided by or extracted from the module.
53 	 */
54 	void						*am_cookie;
55 	audit_filter_attach_t				 am_attach;
56 	audit_filter_reinit_t				 am_reinit;
57 	audit_filter_record_t				 am_record;
58 	audit_filter_rawrecord_t			 am_rawrecord;
59 	audit_filter_detach_t				 am_detach;
60 
61 	/*
62 	 * Fields for maintaining the list of modules.
63 	 */
64 	TAILQ_ENTRY(auditfilter_module)			 am_list;
65 };
66 TAILQ_HEAD(auditfilter_module_list, auditfilter_module);
67 
68 /*
69  * List of currently registered modules.
70  */
71 extern struct auditfilter_module_list	filter_list;
72 
73 /*
74  * Function definitions.
75  */
76 int	auditfilterd_conf(const char *filename, FILE *fp);
77 void	auditfilterd_conf_shutdown(void);
78