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1 | /* |
2 | * NetLabel NETLINK Interface |
3 | * |
4 | * This file defines the NETLINK interface 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.moore@hp.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, write to the Free Software |
27 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
28 | * |
29 | */ |
30 | |
31 | #include <linux/init.h> |
32 | #include <linux/types.h> |
33 | #include <linux/list.h> |
34 | #include <linux/socket.h> |
35 | #include <linux/audit.h> |
36 | #include <linux/tty.h> |
37 | #include <linux/security.h> |
38 | #include <linux/gfp.h> |
39 | #include <net/sock.h> |
40 | #include <net/netlink.h> |
41 | #include <net/genetlink.h> |
42 | #include <net/netlabel.h> |
43 | #include <asm/bug.h> |
44 | |
45 | #include "netlabel_mgmt.h" |
46 | #include "netlabel_unlabeled.h" |
47 | #include "netlabel_cipso_v4.h" |
48 | #include "netlabel_user.h" |
49 | |
50 | /* |
51 | * NetLabel NETLINK Setup Functions |
52 | */ |
53 | |
54 | /** |
55 | * netlbl_netlink_init - Initialize the NETLINK communication channel |
56 | * |
57 | * Description: |
58 | * Call out to the NetLabel components so they can register their families and |
59 | * commands with the Generic NETLINK mechanism. Returns zero on success and |
60 | * non-zero on failure. |
61 | * |
62 | */ |
63 | int __init netlbl_netlink_init(void) |
64 | { |
65 | int ret_val; |
66 | |
67 | ret_val = netlbl_mgmt_genl_init(); |
68 | if (ret_val != 0) |
69 | return ret_val; |
70 | |
71 | ret_val = netlbl_cipsov4_genl_init(); |
72 | if (ret_val != 0) |
73 | return ret_val; |
74 | |
75 | ret_val = netlbl_unlabel_genl_init(); |
76 | if (ret_val != 0) |
77 | return ret_val; |
78 | |
79 | return 0; |
80 | } |
81 | |
82 | /* |
83 | * NetLabel Audit Functions |
84 | */ |
85 | |
86 | /** |
87 | * netlbl_audit_start_common - Start an audit message |
88 | * @type: audit message type |
89 | * @audit_info: NetLabel audit information |
90 | * |
91 | * Description: |
92 | * Start an audit message using the type specified in @type and fill the audit |
93 | * message with some fields common to all NetLabel audit messages. Returns |
94 | * a pointer to the audit buffer on success, NULL on failure. |
95 | * |
96 | */ |
97 | struct audit_buffer *netlbl_audit_start_common(int type, |
98 | struct netlbl_audit *audit_info) |
99 | { |
100 | struct audit_buffer *audit_buf; |
101 | char *secctx; |
102 | u32 secctx_len; |
103 | |
104 | if (audit_enabled == 0) |
105 | return NULL; |
106 | |
107 | audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, type); |
108 | if (audit_buf == NULL) |
109 | return NULL; |
110 | |
111 | audit_log_format(audit_buf, "netlabel: auid=%u ses=%u", |
112 | audit_info->loginuid, |
113 | audit_info->sessionid); |
114 | |
115 | if (audit_info->secid != 0 && |
116 | security_secid_to_secctx(audit_info->secid, |
117 | &secctx, |
118 | &secctx_len) == 0) { |
119 | audit_log_format(audit_buf, " subj=%s", secctx); |
120 | security_release_secctx(secctx, secctx_len); |
121 | } |
122 | |
123 | return audit_buf; |
124 | } |
125 |
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