blob: a3fd75ac3fa50187bd7ff6924700569b2b1cebc4 [file] [log] [blame]
Paul Moored15c3452006-08-03 16:48:37 -07001/*
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>
Paul Moore32f50cd2006-09-28 14:51:47 -070035#include <linux/audit.h>
36#include <linux/tty.h>
37#include <linux/security.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090038#include <linux/gfp.h>
Paul Moored15c3452006-08-03 16:48:37 -070039#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 */
Pavel Emelyanov05705e42008-02-17 22:33:57 -080063int __init netlbl_netlink_init(void)
Paul Moored15c3452006-08-03 16:48:37 -070064{
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}
Paul Moore32f50cd2006-09-28 14:51:47 -070081
82/*
83 * NetLabel Audit Functions
84 */
85
86/**
87 * netlbl_audit_start_common - Start an audit message
88 * @type: audit message type
Paul Moore95d4e6b2006-09-29 17:05:05 -070089 * @audit_info: NetLabel audit information
Paul Moore32f50cd2006-09-28 14:51:47 -070090 *
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 */
Paul Moore95d4e6b2006-09-29 17:05:05 -070097struct audit_buffer *netlbl_audit_start_common(int type,
98 struct netlbl_audit *audit_info)
Paul Moore32f50cd2006-09-28 14:51:47 -070099{
Paul Moore32f50cd2006-09-28 14:51:47 -0700100 struct audit_buffer *audit_buf;
Paul Moore32f50cd2006-09-28 14:51:47 -0700101 char *secctx;
102 u32 secctx_len;
103
Paul Moorede646882006-11-17 17:38:55 -0500104 if (audit_enabled == 0)
105 return NULL;
106
Pavel Emelyanov94de7fe2008-02-12 22:35:37 -0800107 audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, type);
Paul Moore32f50cd2006-09-28 14:51:47 -0700108 if (audit_buf == NULL)
109 return NULL;
110
Eric Paris25323862008-04-18 10:09:25 -0400111 audit_log_format(audit_buf, "netlabel: auid=%u ses=%u",
112 audit_info->loginuid,
113 audit_info->sessionid);
Paul Moore32f50cd2006-09-28 14:51:47 -0700114
Paul Moore95d4e6b2006-09-29 17:05:05 -0700115 if (audit_info->secid != 0 &&
116 security_secid_to_secctx(audit_info->secid,
117 &secctx,
Paul Mooree6e08712007-08-01 11:12:59 -0400118 &secctx_len) == 0) {
Paul Moore32f50cd2006-09-28 14:51:47 -0700119 audit_log_format(audit_buf, " subj=%s", secctx);
Paul Mooree6e08712007-08-01 11:12:59 -0400120 security_release_secctx(secctx, secctx_len);
121 }
Paul Moore32f50cd2006-09-28 14:51:47 -0700122
123 return audit_buf;
124}