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Paul Moored15c3452006-08-03 16:48:37 -07001/*
2 * NetLabel Domain Hash Table
3 *
4 * This file manages the domain hash table that NetLabel uses to determine
5 * which network labeling protocol to use for a given domain. The NetLabel
6 * system manages static and dynamic label mappings for network protocols such
7 * as CIPSO and RIPSO.
8 *
Paul Moore82c21bf2011-08-01 11:10:33 +00009 * Author: Paul Moore <paul@paul-moore.com>
Paul Moored15c3452006-08-03 16:48:37 -070010 *
11 */
12
13/*
Paul Moore63c41682008-10-10 10:16:32 -040014 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008
Paul Moored15c3452006-08-03 16:48:37 -070015 *
16 * This program is free software; you can redistribute it and/or modify
17 * it under the terms of the GNU General Public License as published by
18 * the Free Software Foundation; either version 2 of the License, or
19 * (at your option) any later version.
20 *
21 * This program is distributed in the hope that it will be useful,
22 * but WITHOUT ANY WARRANTY; without even the implied warranty of
23 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
24 * the GNU General Public License for more details.
25 *
26 * You should have received a copy of the GNU General Public License
27 * along with this program; if not, write to the Free Software
28 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
29 *
30 */
31
32#ifndef _NETLABEL_DOMAINHASH_H
33#define _NETLABEL_DOMAINHASH_H
34
Paul Moore7a0e1d62006-08-29 17:56:04 -070035#include <linux/types.h>
36#include <linux/rcupdate.h>
37#include <linux/list.h>
38
Paul Moore63c41682008-10-10 10:16:32 -040039#include "netlabel_addrlist.h"
40
Paul Moored15c3452006-08-03 16:48:37 -070041/* Domain hash table size */
42/* XXX - currently this number is an uneducated guess */
43#define NETLBL_DOMHSH_BITSIZE 7
44
Paul Moore63c41682008-10-10 10:16:32 -040045/* Domain mapping definition structures */
46#define netlbl_domhsh_addr4_entry(iter) \
47 container_of(iter, struct netlbl_domaddr4_map, list)
48struct netlbl_domaddr4_map {
49 u32 type;
50 union {
51 struct cipso_v4_doi *cipsov4;
52 } type_def;
53
54 struct netlbl_af4list list;
55};
56#define netlbl_domhsh_addr6_entry(iter) \
57 container_of(iter, struct netlbl_domaddr6_map, list)
58struct netlbl_domaddr6_map {
59 u32 type;
60
61 /* NOTE: no 'type_def' union needed at present since we don't currently
62 * support any IPv6 labeling protocols */
63
64 struct netlbl_af6list list;
65};
66struct netlbl_domaddr_map {
67 struct list_head list4;
68 struct list_head list6;
69};
Paul Moored15c3452006-08-03 16:48:37 -070070struct netlbl_dom_map {
71 char *domain;
72 u32 type;
73 union {
74 struct cipso_v4_doi *cipsov4;
Paul Moore63c41682008-10-10 10:16:32 -040075 struct netlbl_domaddr_map *addrsel;
Paul Moored15c3452006-08-03 16:48:37 -070076 } type_def;
77
78 u32 valid;
79 struct list_head list;
80 struct rcu_head rcu;
81};
82
83/* init function */
84int netlbl_domhsh_init(u32 size);
85
86/* Manipulate the domain hash table */
Paul Moore95d4e6b2006-09-29 17:05:05 -070087int netlbl_domhsh_add(struct netlbl_dom_map *entry,
88 struct netlbl_audit *audit_info);
89int netlbl_domhsh_add_default(struct netlbl_dom_map *entry,
90 struct netlbl_audit *audit_info);
Paul Mooreb1edeb12008-10-10 10:16:31 -040091int netlbl_domhsh_remove_entry(struct netlbl_dom_map *entry,
92 struct netlbl_audit *audit_info);
Paul Moore6c2e8ac2008-12-31 12:54:11 -050093int netlbl_domhsh_remove_af4(const char *domain,
94 const struct in_addr *addr,
95 const struct in_addr *mask,
96 struct netlbl_audit *audit_info);
Paul Mooreeda61d32008-02-04 22:29:47 -080097int netlbl_domhsh_remove(const char *domain, struct netlbl_audit *audit_info);
Paul Moore95d4e6b2006-09-29 17:05:05 -070098int netlbl_domhsh_remove_default(struct netlbl_audit *audit_info);
Paul Moored15c3452006-08-03 16:48:37 -070099struct netlbl_dom_map *netlbl_domhsh_getentry(const char *domain);
Paul Moore63c41682008-10-10 10:16:32 -0400100struct netlbl_domaddr4_map *netlbl_domhsh_getentry_af4(const char *domain,
101 __be32 addr);
Paul Moorefcd48282006-09-25 15:56:09 -0700102int netlbl_domhsh_walk(u32 *skip_bkt,
103 u32 *skip_chain,
104 int (*callback) (struct netlbl_dom_map *entry, void *arg),
105 void *cb_arg);
Paul Moored15c3452006-08-03 16:48:37 -0700106
Eric Dumazetdfd56b82011-12-10 09:48:31 +0000107#if IS_ENABLED(CONFIG_IPV6)
Paul Moore63c41682008-10-10 10:16:32 -0400108struct netlbl_domaddr6_map *netlbl_domhsh_getentry_af6(const char *domain,
109 const struct in6_addr *addr);
110#endif /* IPv6 */
111
Paul Moored15c3452006-08-03 16:48:37 -0700112#endif