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1/*
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 *
9 * Author: Paul Moore <paul@paul-moore.com>
10 *
11 */
12
13/*
14 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008
15 *
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
35#include <linux/types.h>
36#include <linux/rcupdate.h>
37#include <linux/list.h>
38
39#include "netlabel_addrlist.h"
40
41/* Domain hash table size */
42/* XXX - currently this number is an uneducated guess */
43#define NETLBL_DOMHSH_BITSIZE 7
44
45/* Domain mapping definition structures */
46struct netlbl_domaddr_map {
47 struct list_head list4;
48 struct list_head list6;
49};
50struct netlbl_dommap_def {
51 u32 type;
52 union {
53 struct netlbl_domaddr_map *addrsel;
54 struct cipso_v4_doi *cipso;
55 };
56};
57#define netlbl_domhsh_addr4_entry(iter) \
58 container_of(iter, struct netlbl_domaddr4_map, list)
59struct netlbl_domaddr4_map {
60 struct netlbl_dommap_def def;
61
62 struct netlbl_af4list list;
63};
64#define netlbl_domhsh_addr6_entry(iter) \
65 container_of(iter, struct netlbl_domaddr6_map, list)
66struct netlbl_domaddr6_map {
67 struct netlbl_dommap_def def;
68
69 struct netlbl_af6list list;
70};
71
72struct netlbl_dom_map {
73 char *domain;
74 struct netlbl_dommap_def def;
75
76 u32 valid;
77 struct list_head list;
78 struct rcu_head rcu;
79};
80
81/* init function */
82int netlbl_domhsh_init(u32 size);
83
84/* Manipulate the domain hash table */
85int netlbl_domhsh_add(struct netlbl_dom_map *entry,
86 struct netlbl_audit *audit_info);
87int netlbl_domhsh_add_default(struct netlbl_dom_map *entry,
88 struct netlbl_audit *audit_info);
89int netlbl_domhsh_remove_entry(struct netlbl_dom_map *entry,
90 struct netlbl_audit *audit_info);
91int netlbl_domhsh_remove_af4(const char *domain,
92 const struct in_addr *addr,
93 const struct in_addr *mask,
94 struct netlbl_audit *audit_info);
95int netlbl_domhsh_remove(const char *domain, struct netlbl_audit *audit_info);
96int netlbl_domhsh_remove_default(struct netlbl_audit *audit_info);
97struct netlbl_dom_map *netlbl_domhsh_getentry(const char *domain);
98struct netlbl_dommap_def *netlbl_domhsh_getentry_af4(const char *domain,
99 __be32 addr);
100#if IS_ENABLED(CONFIG_IPV6)
101struct netlbl_dommap_def *netlbl_domhsh_getentry_af6(const char *domain,
102 const struct in6_addr *addr);
103#endif /* IPv6 */
104
105int netlbl_domhsh_walk(u32 *skip_bkt,
106 u32 *skip_chain,
107 int (*callback) (struct netlbl_dom_map *entry, void *arg),
108 void *cb_arg);
109
110#endif