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 */
74enum {
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 */
84enum {
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)
100int netlbl_calipso_genl_init(void);
101#else
102static inline int netlbl_calipso_genl_init(void)
103{
104	return 0;
105}
106#endif
107
108int calipso_doi_add(struct calipso_doi *doi_def,
109		    struct netlbl_audit *audit_info);
110void calipso_doi_free(struct calipso_doi *doi_def);
111int calipso_doi_remove(u32 doi, struct netlbl_audit *audit_info);
112struct calipso_doi *calipso_doi_getdef(u32 doi);
113void calipso_doi_putdef(struct calipso_doi *doi_def);
114int calipso_doi_walk(u32 *skip_cnt,
115		     int (*callback)(struct calipso_doi *doi_def, void *arg),
116		     void *cb_arg);
117int calipso_sock_getattr(struct sock *sk, struct netlbl_lsm_secattr *secattr);
118int calipso_sock_setattr(struct sock *sk,
119			 const struct calipso_doi *doi_def,
120			 const struct netlbl_lsm_secattr *secattr);
121void calipso_sock_delattr(struct sock *sk);
122int calipso_req_setattr(struct request_sock *req,
123			const struct calipso_doi *doi_def,
124			const struct netlbl_lsm_secattr *secattr);
125void calipso_req_delattr(struct request_sock *req);
126unsigned char *calipso_optptr(const struct sk_buff *skb);
127int calipso_getattr(const unsigned char *calipso,
128		    struct netlbl_lsm_secattr *secattr);
129int calipso_skbuff_setattr(struct sk_buff *skb,
130			   const struct calipso_doi *doi_def,
131			   const struct netlbl_lsm_secattr *secattr);
132int calipso_skbuff_delattr(struct sk_buff *skb);
133void calipso_cache_invalidate(void);
134int calipso_cache_add(const unsigned char *calipso_ptr,
135		      const struct netlbl_lsm_secattr *secattr);
136
137#endif
138