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[MLSXFRM]: Add security sid to sock

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This adds security for IP sockets at the sock level. Security at the
sock level is needed to enforce the SELinux security policy for
security associations even when a sock is orphaned (such as in the TCP
LAST_ACK state).

This will also be used to enforce SELinux controls over data arriving
at or leaving a child socket while it's still waiting to be accepted.

Signed-off-by: Venkat Yekkirala <vyekkirala@TrustedCS.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Venkat Yekkirala 2006-08-04 23:08:56 -07:00 • committed by David S. Miller
parent 08554d6b33
commit 892c141e62
6 changed files with 53 additions and 18 deletions
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12
include/linux/security.h
View file

@ -812,6 +812,8 @@ struct swap_info_struct;
* which is used to copy security attributes between local stream sockets.
* @sk_free_security:
* Deallocate security structure.
* @sk_clone_security:
* Clone/copy security structure.
* @sk_getsid:
* Retrieve the LSM-specific sid for the sock to enable caching of network
* authorizations.
@ -1332,6 +1334,7 @@ struct security_operations {
int (*socket_getpeersec_dgram) (struct socket *sock, struct sk_buff *skb, u32 *secid);
int (*sk_alloc_security) (struct sock *sk, int family, gfp_t priority);
void (*sk_free_security) (struct sock *sk);
void (*sk_clone_security) (const struct sock *sk, struct sock *newsk);
unsigned int (*sk_getsid) (struct sock *sk, struct flowi *fl, u8 dir);
#endif /* CONFIG_SECURITY_NETWORK */
@ -2885,6 +2888,11 @@ static inline void security_sk_free(struct sock *sk)
return security_ops->sk_free_security(sk);
}
static inline void security_sk_clone(const struct sock *sk, struct sock *newsk)
{
return security_ops->sk_clone_security(sk, newsk);
}
static inline unsigned int security_sk_sid(struct sock *sk, struct flowi *fl, u8 dir)
{
return security_ops->sk_getsid(sk, fl, dir);
@ -3011,6 +3019,10 @@ static inline void security_sk_free(struct sock *sk)
{
}
static inline void security_sk_clone(const struct sock *sk, struct sock *newsk)
{
}
static inline unsigned int security_sk_sid(struct sock *sk, struct flowi *fl, u8 dir)
{
return 0;