selinux: Set socket NetLabel based on connection endpoint

Previous work enabled the use of address based NetLabel selectors, which while
highly useful, brought the potential for additional per-packet overhead when
used.  This patch attempts to solve that by applying NetLabel socket labels
when sockets are connect()'d.  This should alleviate the per-packet NetLabel
labeling for all connected sockets (yes, it even works for connected DGRAM
sockets).

Signed-off-by: Paul Moore <paul.moore@hp.com>
Reviewed-by: James Morris <jmorris@namei.org>

1 files changed, 13 insertions, 0 deletions

diff --git a/include/net/netlabel.h b/include/net/netlabel.h
index 3f67e6d49e40..074cad40ac66 100644
--- a/include/net/netlabel.h
+++ b/include/net/netlabel.h
@@ -380,8 +380,12 @@ int netlbl_secattr_catmap_setrng(struct netlbl_lsm_secattr_catmap *catmap,
 int netlbl_enabled(void);
 int netlbl_sock_setattr(struct sock *sk,
                         const struct netlbl_lsm_secattr *secattr);
+void netlbl_sock_delattr(struct sock *sk);
 int netlbl_sock_getattr(struct sock *sk,
                         struct netlbl_lsm_secattr *secattr);
+int netlbl_conn_setattr(struct sock *sk,
+                        struct sockaddr *addr,
+                        const struct netlbl_lsm_secattr *secattr);
 int netlbl_skbuff_setattr(struct sk_buff *skb,
                           u16 family,
                           const struct netlbl_lsm_secattr *secattr);
@@ -449,11 +453,20 @@ static inline int netlbl_sock_setattr(struct sock *sk,
 {
         return -ENOSYS;
 }
+static inline void netlbl_sock_delattr(struct sock *sk)
+{
+}
 static inline int netlbl_sock_getattr(struct sock *sk,
                                       struct netlbl_lsm_secattr *secattr)
 {
         return -ENOSYS;
 }
+static inline int netlbl_conn_setattr(struct sock *sk,
+                                      struct sockaddr *addr,
+                                      const struct netlbl_lsm_secattr *secattr)
+{
+        return -ENOSYS;
+}
 static inline int netlbl_skbuff_setattr(struct sk_buff *skb,
                                       u16 family,
                                       const struct netlbl_lsm_secattr *secattr)