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