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
138