aboutsummaryrefslogtreecommitdiffstats
path: root/security/selinux/include/selinux_netlabel.h
blob: d885d880540e6c643ba1e2bd3935081edcc99f50 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
/*
 * SELinux interface to the NetLabel subsystem
 *
 * Author : Paul Moore <paul.moore@hp.com>
 *
 */

/*
 * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
 *
 * This program is free software;  you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY;  without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
 * the GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program;  if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 */

#ifndef _SELINUX_NETLABEL_H_
#define _SELINUX_NETLABEL_H_

#ifdef CONFIG_NETLABEL
void selinux_netlbl_cache_invalidate(void);
int selinux_netlbl_socket_post_create(struct socket *sock,
				      int sock_family,
				      u32 sid);
void selinux_netlbl_sock_graft(struct sock *sk, struct socket *sock);
u32 selinux_netlbl_inet_conn_request(struct sk_buff *skb, u32 sock_sid);
int selinux_netlbl_sock_rcv_skb(struct sk_security_struct *sksec,
				struct sk_buff *skb,
				struct avc_audit_data *ad);
u32 selinux_netlbl_socket_getpeersec_stream(struct socket *sock);
u32 selinux_netlbl_socket_getpeersec_dgram(struct sk_buff *skb);
void selinux_netlbl_sk_security_init(struct sk_security_struct *ssec,
				     int family);
void selinux_netlbl_sk_clone_security(struct sk_security_struct *ssec,
				      struct sk_security_struct *newssec);

int __selinux_netlbl_inode_permission(struct inode *inode, int mask);
/**
 * selinux_netlbl_inode_permission - Verify the socket is NetLabel labeled
 * @inode: the file descriptor's inode
 * @mask: the permission mask
 *
 * Description:
 * Looks at a file's inode and if it is marked as a socket protected by
 * NetLabel then verify that the socket has been labeled, if not try to label
 * the socket now with the inode's SID.  Returns zero on success, negative
 * values on failure.
 *
 */
static inline int selinux_netlbl_inode_permission(struct inode *inode,
						  int mask)
{
	int rc = 0;
	struct inode_security_struct *isec;
	struct sk_security_struct *sksec;

	if (!S_ISSOCK(inode->i_mode))
		return 0;

	isec = inode->i_security;
	sksec = SOCKET_I(inode)->sk->sk_security;
	down(&isec->sem);
	if (unlikely(sksec->nlbl_state == NLBL_REQUIRE &&
		     (mask & (MAY_WRITE | MAY_APPEND))))
		rc = __selinux_netlbl_inode_permission(inode, mask);
	up(&isec->sem);

	return rc;
}
#else
static inline void selinux_netlbl_cache_invalidate(void)
{
	return;
}

static inline int selinux_netlbl_socket_post_create(struct socket *sock,
						    int sock_family,
						    u32 sid)
{
	return 0;
}

static inline void selinux_netlbl_sock_graft(struct sock *sk,
					     struct socket *sock)
{
	return;
}

static inline u32 selinux_netlbl_inet_conn_request(struct sk_buff *skb,
						   u32 sock_sid)
{
	return SECSID_NULL;
}

static inline int selinux_netlbl_sock_rcv_skb(struct sk_security_struct *sksec,
					      struct sk_buff *skb,
					      struct avc_audit_data *ad)
{
	return 0;
}

static inline u32 selinux_netlbl_socket_getpeersec_stream(struct socket *sock)
{
	return SECSID_NULL;
}

static inline u32 selinux_netlbl_socket_getpeersec_dgram(struct sk_buff *skb)
{
	return SECSID_NULL;
}

static inline void selinux_netlbl_sk_security_init(
	                                       struct sk_security_struct *ssec,
					       int family)
{
	return;
}

static inline void selinux_netlbl_sk_clone_security(
	                                   struct sk_security_struct *ssec,
					   struct sk_security_struct *newssec)
{
	return;
}

static inline int selinux_netlbl_inode_permission(struct inode *inode,
						  int mask)
{
	return 0;
}
#endif /* CONFIG_NETLABEL */

#endif

Privacy Policy