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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 | * | |
82c21bfa | 9 | * Author: Paul Moore <paul@paul-moore.com> |
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10 | * |
11 | */ | |
12 | ||
13 | /* | |
63c41688 | 14 | * (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008 |
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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 | |
d484ff15 | 27 | * along with this program; if not, see <http://www.gnu.org/licenses/>. |
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28 | * |
29 | */ | |
30 | ||
31 | #ifndef _NETLABEL_DOMAINHASH_H | |
32 | #define _NETLABEL_DOMAINHASH_H | |
33 | ||
7a0e1d60 PM |
34 | #include <linux/types.h> |
35 | #include <linux/rcupdate.h> | |
36 | #include <linux/list.h> | |
37 | ||
63c41688 PM |
38 | #include "netlabel_addrlist.h" |
39 | ||
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40 | /* Domain hash table size */ |
41 | /* XXX - currently this number is an uneducated guess */ | |
42 | #define NETLBL_DOMHSH_BITSIZE 7 | |
43 | ||
63c41688 | 44 | /* Domain mapping definition structures */ |
6a8b7f0c PM |
45 | struct netlbl_domaddr_map { |
46 | struct list_head list4; | |
47 | struct list_head list6; | |
48 | }; | |
49 | struct netlbl_dommap_def { | |
50 | u32 type; | |
51 | union { | |
52 | struct netlbl_domaddr_map *addrsel; | |
53 | struct cipso_v4_doi *cipso; | |
54 | }; | |
55 | }; | |
63c41688 PM |
56 | #define netlbl_domhsh_addr4_entry(iter) \ |
57 | container_of(iter, struct netlbl_domaddr4_map, list) | |
58 | struct netlbl_domaddr4_map { | |
6a8b7f0c | 59 | struct netlbl_dommap_def def; |
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60 | |
61 | struct netlbl_af4list list; | |
62 | }; | |
63 | #define netlbl_domhsh_addr6_entry(iter) \ | |
64 | container_of(iter, struct netlbl_domaddr6_map, list) | |
65 | struct netlbl_domaddr6_map { | |
6a8b7f0c | 66 | struct netlbl_dommap_def def; |
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67 | |
68 | struct netlbl_af6list list; | |
69 | }; | |
6a8b7f0c | 70 | |
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71 | struct netlbl_dom_map { |
72 | char *domain; | |
6a8b7f0c | 73 | struct netlbl_dommap_def def; |
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74 | |
75 | u32 valid; | |
76 | struct list_head list; | |
77 | struct rcu_head rcu; | |
78 | }; | |
79 | ||
80 | /* init function */ | |
81 | int netlbl_domhsh_init(u32 size); | |
82 | ||
83 | /* Manipulate the domain hash table */ | |
95d4e6be PM |
84 | int netlbl_domhsh_add(struct netlbl_dom_map *entry, |
85 | struct netlbl_audit *audit_info); | |
86 | int netlbl_domhsh_add_default(struct netlbl_dom_map *entry, | |
87 | struct netlbl_audit *audit_info); | |
b1edeb10 PM |
88 | int netlbl_domhsh_remove_entry(struct netlbl_dom_map *entry, |
89 | struct netlbl_audit *audit_info); | |
6c2e8ac0 PM |
90 | int netlbl_domhsh_remove_af4(const char *domain, |
91 | const struct in_addr *addr, | |
92 | const struct in_addr *mask, | |
93 | struct netlbl_audit *audit_info); | |
eda61d32 | 94 | int netlbl_domhsh_remove(const char *domain, struct netlbl_audit *audit_info); |
95d4e6be | 95 | int netlbl_domhsh_remove_default(struct netlbl_audit *audit_info); |
d15c345f | 96 | struct netlbl_dom_map *netlbl_domhsh_getentry(const char *domain); |
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97 | struct netlbl_dommap_def *netlbl_domhsh_getentry_af4(const char *domain, |
98 | __be32 addr); | |
99 | #if IS_ENABLED(CONFIG_IPV6) | |
100 | struct netlbl_dommap_def *netlbl_domhsh_getentry_af6(const char *domain, | |
101 | const struct in6_addr *addr); | |
102 | #endif /* IPv6 */ | |
103 | ||
fcd48280 PM |
104 | int netlbl_domhsh_walk(u32 *skip_bkt, |
105 | u32 *skip_chain, | |
106 | int (*callback) (struct netlbl_dom_map *entry, void *arg), | |
107 | void *cb_arg); | |
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108 | |
109 | #endif |