blob: adf8b7900da2ac131c8ebc61d60d1373493d30c4 [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 *
Paul Moore82c21bf2011-08-01 11:10:33 +00008 * Author: Paul Moore <paul@paul-moore.com>
Paul Moored15c3452006-08-03 16:48:37 -07009 *
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
Jeff Kirsherd484ff12013-12-06 09:13:41 -080026 * along with this program; if not, see <http://www.gnu.org/licenses/>.
Paul Moored15c3452006-08-03 16:48:37 -070027 *
28 */
29
30#include <linux/init.h>
31#include <linux/types.h>
32#include <linux/list.h>
33#include <linux/socket.h>
Paul Moore32f50cd2006-09-28 14:51:47 -070034#include <linux/audit.h>
35#include <linux/tty.h>
36#include <linux/security.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090037#include <linux/gfp.h>
Paul Moored15c3452006-08-03 16:48:37 -070038#include <net/sock.h>
39#include <net/netlink.h>
40#include <net/genetlink.h>
41#include <net/netlabel.h>
42#include <asm/bug.h>
43
44#include "netlabel_mgmt.h"
45#include "netlabel_unlabeled.h"
46#include "netlabel_cipso_v4.h"
47#include "netlabel_user.h"
48
49/*
50 * NetLabel NETLINK Setup Functions
51 */
52
53/**
54 * netlbl_netlink_init - Initialize the NETLINK communication channel
55 *
56 * Description:
57 * Call out to the NetLabel components so they can register their families and
58 * commands with the Generic NETLINK mechanism. Returns zero on success and
59 * non-zero on failure.
60 *
61 */
Pavel Emelyanov05705e42008-02-17 22:33:57 -080062int __init netlbl_netlink_init(void)
Paul Moored15c3452006-08-03 16:48:37 -070063{
64 int ret_val;
65
66 ret_val = netlbl_mgmt_genl_init();
67 if (ret_val != 0)
68 return ret_val;
69
70 ret_val = netlbl_cipsov4_genl_init();
71 if (ret_val != 0)
72 return ret_val;
73
Fabian Frederick16b99a42014-10-08 20:37:01 +020074 return netlbl_unlabel_genl_init();
Paul Moored15c3452006-08-03 16:48:37 -070075}
Paul Moore32f50cd2006-09-28 14:51:47 -070076
77/*
78 * NetLabel Audit Functions
79 */
80
81/**
82 * netlbl_audit_start_common - Start an audit message
83 * @type: audit message type
Paul Moore95d4e6b2006-09-29 17:05:05 -070084 * @audit_info: NetLabel audit information
Paul Moore32f50cd2006-09-28 14:51:47 -070085 *
86 * Description:
87 * Start an audit message using the type specified in @type and fill the audit
88 * message with some fields common to all NetLabel audit messages. Returns
89 * a pointer to the audit buffer on success, NULL on failure.
90 *
91 */
Paul Moore95d4e6b2006-09-29 17:05:05 -070092struct audit_buffer *netlbl_audit_start_common(int type,
93 struct netlbl_audit *audit_info)
Paul Moore32f50cd2006-09-28 14:51:47 -070094{
Paul Moore32f50cd2006-09-28 14:51:47 -070095 struct audit_buffer *audit_buf;
Paul Moore32f50cd2006-09-28 14:51:47 -070096 char *secctx;
97 u32 secctx_len;
98
Paul Moorede646882006-11-17 17:38:55 -050099 if (audit_enabled == 0)
100 return NULL;
101
Pavel Emelyanov94de7fe2008-02-12 22:35:37 -0800102 audit_buf = audit_log_start(current->audit_context, GFP_ATOMIC, type);
Paul Moore32f50cd2006-09-28 14:51:47 -0700103 if (audit_buf == NULL)
104 return NULL;
105
Eric Paris25323862008-04-18 10:09:25 -0400106 audit_log_format(audit_buf, "netlabel: auid=%u ses=%u",
Eric W. Biedermane1760bd2012-09-10 22:39:43 -0700107 from_kuid(&init_user_ns, audit_info->loginuid),
Eric Paris25323862008-04-18 10:09:25 -0400108 audit_info->sessionid);
Paul Moore32f50cd2006-09-28 14:51:47 -0700109
Paul Moore95d4e6b2006-09-29 17:05:05 -0700110 if (audit_info->secid != 0 &&
111 security_secid_to_secctx(audit_info->secid,
112 &secctx,
Paul Mooree6e08712007-08-01 11:12:59 -0400113 &secctx_len) == 0) {
Paul Moore32f50cd2006-09-28 14:51:47 -0700114 audit_log_format(audit_buf, " subj=%s", secctx);
Paul Mooree6e08712007-08-01 11:12:59 -0400115 security_release_secctx(secctx, secctx_len);
116 }
Paul Moore32f50cd2006-09-28 14:51:47 -0700117
118 return audit_buf;
119}