1/*
2 * NetLabel CIPSO/IPv4 Support
3 *
4 * This file defines the CIPSO/IPv4 functions for the NetLabel system.  The
5 * NetLabel system manages static and dynamic label mappings for network
6 * protocols such as CIPSO and RIPSO.
7 *
8 * Author: Paul Moore <paul@paul-moore.com>
9 *
10 */
11
12/*
13 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
14 *
15 * This program is free software;  you can redistribute it and/or modify
16 * it under the terms of the GNU General Public License as published by
17 * the Free Software Foundation; either version 2 of the License, or
18 * (at your option) any later version.
19 *
20 * This program is distributed in the hope that it will be useful,
21 * but WITHOUT ANY WARRANTY;  without even the implied warranty of
22 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
23 * the GNU General Public License for more details.
24 *
25 * You should have received a copy of the GNU General Public License
26 * along with this program;  if not, see <http://www.gnu.org/licenses/>.
27 *
28 */
29
30#ifndef _NETLABEL_CIPSO_V4
31#define _NETLABEL_CIPSO_V4
32
33#include <net/netlabel.h>
34
35/*
36 * The following NetLabel payloads are supported by the CIPSO subsystem.
37 *
38 * o ADD:
39 *   Sent by an application to add a new DOI mapping table.
40 *
41 *   Required attributes:
42 *
43 *     NLBL_CIPSOV4_A_DOI
44 *     NLBL_CIPSOV4_A_MTYPE
45 *     NLBL_CIPSOV4_A_TAGLST
46 *
47 *   If using CIPSO_V4_MAP_TRANS the following attributes are required:
48 *
49 *     NLBL_CIPSOV4_A_MLSLVLLST
50 *     NLBL_CIPSOV4_A_MLSCATLST
51 *
52 *   If using CIPSO_V4_MAP_PASS or CIPSO_V4_MAP_LOCAL no additional attributes
53 *   are required.
54 *
55 * o REMOVE:
56 *   Sent by an application to remove a specific DOI mapping table from the
57 *   CIPSO V4 system.
58 *
59 *   Required attributes:
60 *
61 *     NLBL_CIPSOV4_A_DOI
62 *
63 * o LIST:
64 *   Sent by an application to list the details of a DOI definition.  On
65 *   success the kernel should send a response using the following format.
66 *
67 *   Required attributes:
68 *
69 *     NLBL_CIPSOV4_A_DOI
70 *
71 *   The valid response message format depends on the type of the DOI mapping,
72 *   the defined formats are shown below.
73 *
74 *   Required attributes:
75 *
76 *     NLBL_CIPSOV4_A_MTYPE
77 *     NLBL_CIPSOV4_A_TAGLST
78 *
79 *   If using CIPSO_V4_MAP_TRANS the following attributes are required:
80 *
81 *     NLBL_CIPSOV4_A_MLSLVLLST
82 *     NLBL_CIPSOV4_A_MLSCATLST
83 *
84 *   If using CIPSO_V4_MAP_PASS or CIPSO_V4_MAP_LOCAL no additional attributes
85 *   are required.
86 *
87 * o LISTALL:
88 *   This message is sent by an application to list the valid DOIs on the
89 *   system.  When sent by an application there is no payload and the
90 *   NLM_F_DUMP flag should be set.  The kernel should respond with a series of
91 *   the following messages.
92 *
93 *   Required attributes:
94 *
95 *    NLBL_CIPSOV4_A_DOI
96 *    NLBL_CIPSOV4_A_MTYPE
97 *
98 */
99
100/* NetLabel CIPSOv4 commands */
101enum {
102	NLBL_CIPSOV4_C_UNSPEC,
103	NLBL_CIPSOV4_C_ADD,
104	NLBL_CIPSOV4_C_REMOVE,
105	NLBL_CIPSOV4_C_LIST,
106	NLBL_CIPSOV4_C_LISTALL,
107	__NLBL_CIPSOV4_C_MAX,
108};
109
110/* NetLabel CIPSOv4 attributes */
111enum {
112	NLBL_CIPSOV4_A_UNSPEC,
113	NLBL_CIPSOV4_A_DOI,
114	/* (NLA_U32)
115	 * the DOI value */
116	NLBL_CIPSOV4_A_MTYPE,
117	/* (NLA_U32)
118	 * the mapping table type (defined in the cipso_ipv4.h header as
119	 * CIPSO_V4_MAP_*) */
120	NLBL_CIPSOV4_A_TAG,
121	/* (NLA_U8)
122	 * a CIPSO tag type, meant to be used within a NLBL_CIPSOV4_A_TAGLST
123	 * attribute */
124	NLBL_CIPSOV4_A_TAGLST,
125	/* (NLA_NESTED)
126	 * the CIPSO tag list for the DOI, there must be at least one
127	 * NLBL_CIPSOV4_A_TAG attribute, tags listed first are given higher
128	 * priorirty when sending packets */
129	NLBL_CIPSOV4_A_MLSLVLLOC,
130	/* (NLA_U32)
131	 * the local MLS sensitivity level */
132	NLBL_CIPSOV4_A_MLSLVLREM,
133	/* (NLA_U32)
134	 * the remote MLS sensitivity level */
135	NLBL_CIPSOV4_A_MLSLVL,
136	/* (NLA_NESTED)
137	 * a MLS sensitivity level mapping, must contain only one attribute of
138	 * each of the following types: NLBL_CIPSOV4_A_MLSLVLLOC and
139	 * NLBL_CIPSOV4_A_MLSLVLREM */
140	NLBL_CIPSOV4_A_MLSLVLLST,
141	/* (NLA_NESTED)
142	 * the CIPSO level mappings, there must be at least one
143	 * NLBL_CIPSOV4_A_MLSLVL attribute */
144	NLBL_CIPSOV4_A_MLSCATLOC,
145	/* (NLA_U32)
146	 * the local MLS category */
147	NLBL_CIPSOV4_A_MLSCATREM,
148	/* (NLA_U32)
149	 * the remote MLS category */
150	NLBL_CIPSOV4_A_MLSCAT,
151	/* (NLA_NESTED)
152	 * a MLS category mapping, must contain only one attribute of each of
153	 * the following types: NLBL_CIPSOV4_A_MLSCATLOC and
154	 * NLBL_CIPSOV4_A_MLSCATREM */
155	NLBL_CIPSOV4_A_MLSCATLST,
156	/* (NLA_NESTED)
157	 * the CIPSO category mappings, there must be at least one
158	 * NLBL_CIPSOV4_A_MLSCAT attribute */
159	__NLBL_CIPSOV4_A_MAX,
160};
161#define NLBL_CIPSOV4_A_MAX (__NLBL_CIPSOV4_A_MAX - 1)
162
163/* NetLabel protocol functions */
164int netlbl_cipsov4_genl_init(void);
165
166/* Free the memory associated with a CIPSOv4 DOI definition */
167void netlbl_cipsov4_doi_free(struct rcu_head *entry);
168
169#endif
170