net/netlabel/netlabel_calipso.h

   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