1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2 /*
3 * NetLabel CALIPSO Support
4 *
5 * This file defines the CALIPSO functions for the NetLabel system. The
6 * NetLabel system manages static and dynamic label mappings for network
7 * protocols such as CIPSO and RIPSO.
8 *
9 * Authors: Paul Moore <paul@paul-moore.com>
10 * Huw Davies <huw@codeweavers.com>
11 */
12
13 /* (c) Copyright Hewlett-Packard Development Company, L.P., 2006
14 * (c) Copyright Huw Davies <huw@codeweavers.com>, 2015
15 */
16
17 #ifndef _NETLABEL_CALIPSO
18 #define _NETLABEL_CALIPSO
19
20 #include <net/netlabel.h>
21 #include <net/calipso.h>
22
23 /* The following NetLabel payloads are supported by the CALIPSO subsystem.
24 *
25 * o ADD:
26 * Sent by an application to add a new DOI mapping table.
27 *
28 * Required attributes:
29 *
30 * NLBL_CALIPSO_A_DOI
31 * NLBL_CALIPSO_A_MTYPE
32 *
33 * If using CALIPSO_MAP_PASS no additional attributes are required.
34 *
35 * o REMOVE:
36 * Sent by an application to remove a specific DOI mapping table from the
37 * CALIPSO system.
38 *
39 * Required attributes:
40 *
41 * NLBL_CALIPSO_A_DOI
42 *
43 * o LIST:
44 * Sent by an application to list the details of a DOI definition. On
45 * success the kernel should send a response using the following format.
46 *
47 * Required attributes:
48 *
49 * NLBL_CALIPSO_A_DOI
50 *
51 * The valid response message format depends on the type of the DOI mapping,
52 * the defined formats are shown below.
53 *
54 * Required attributes:
55 *
56 * NLBL_CALIPSO_A_MTYPE
57 *
58 * If using CALIPSO_MAP_PASS no additional attributes are required.
59 *
60 * o LISTALL:
61 * This message is sent by an application to list the valid DOIs on the
62 * system. When sent by an application there is no payload and the
63 * NLM_F_DUMP flag should be set. The kernel should respond with a series of
64 * the following messages.
65 *
66 * Required attributes:
67 *
68 * NLBL_CALIPSO_A_DOI
69 * NLBL_CALIPSO_A_MTYPE
70 *
71 */
72
73 /* NetLabel CALIPSO commands */
74 enum {
75 NLBL_CALIPSO_C_UNSPEC,
76 NLBL_CALIPSO_C_ADD,
77 NLBL_CALIPSO_C_REMOVE,
78 NLBL_CALIPSO_C_LIST,
79 NLBL_CALIPSO_C_LISTALL,
80 __NLBL_CALIPSO_C_MAX,
81 };
82
83 /* NetLabel CALIPSO attributes */
84 enum {
85 NLBL_CALIPSO_A_UNSPEC,
86 NLBL_CALIPSO_A_DOI,
87 /* (NLA_U32)
88 * the DOI value */
89 NLBL_CALIPSO_A_MTYPE,
90 /* (NLA_U32)
91 * the mapping table type (defined in the calipso.h header as
92 * CALIPSO_MAP_*) */
93 __NLBL_CALIPSO_A_MAX,
94 };
95
96 #define NLBL_CALIPSO_A_MAX (__NLBL_CALIPSO_A_MAX - 1)
97
98 /* NetLabel protocol functions */
99 #if IS_ENABLED(CONFIG_IPV6)
100 int netlbl_calipso_genl_init(void);
101 #else
102 static inline int netlbl_calipso_genl_init(void)
103 {
104 return 0;
105 }
106 #endif
107
108 int calipso_doi_add(struct calipso_doi *doi_def,
109 struct netlbl_audit *audit_info);
110 void calipso_doi_free(struct calipso_doi *doi_def);
111 int calipso_doi_remove(u32 doi, struct netlbl_audit *audit_info);
112 struct calipso_doi *calipso_doi_getdef(u32 doi);
113 void calipso_doi_putdef(struct calipso_doi *doi_def);
114 int calipso_doi_walk(u32 *skip_cnt,
115 int (*callback)(struct calipso_doi *doi_def, void *arg),
116 void *cb_arg);
117 int calipso_sock_getattr(struct sock *sk, struct netlbl_lsm_secattr *secattr);
118 int calipso_sock_setattr(struct sock *sk,
119 const struct calipso_doi *doi_def,
120 const struct netlbl_lsm_secattr *secattr);
121 void calipso_sock_delattr(struct sock *sk);
122 int calipso_req_setattr(struct request_sock *req,
123 const struct calipso_doi *doi_def,
124 const struct netlbl_lsm_secattr *secattr);
125 void calipso_req_delattr(struct request_sock *req);
126 unsigned char *calipso_optptr(const struct sk_buff *skb);
127 int calipso_getattr(const unsigned char *calipso,
128 struct netlbl_lsm_secattr *secattr);
129 int calipso_skbuff_setattr(struct sk_buff *skb,
130 const struct calipso_doi *doi_def,
131 const struct netlbl_lsm_secattr *secattr);
132 int calipso_skbuff_delattr(struct sk_buff *skb);
133 void calipso_cache_invalidate(void);
134 int calipso_cache_add(const unsigned char *calipso_ptr,
135 const struct netlbl_lsm_secattr *secattr);
136
137 #endif