summaryrefslogtreecommitdiff
path: root/security/selinux/netlabel.c
diff options
context:
space:
mode:
Diffstat (limited to 'security/selinux/netlabel.c')
-rw-r--r--security/selinux/netlabel.c118
1 files changed, 59 insertions, 59 deletions
diff --git a/security/selinux/netlabel.c b/security/selinux/netlabel.c
index 350794ab9b42..8fcb2d56bdcf 100644
--- a/security/selinux/netlabel.c
+++ b/security/selinux/netlabel.c
@@ -281,73 +281,52 @@ skbuff_setsid_return:
}
/**
- * selinux_netlbl_inet_conn_established - Netlabel the newly accepted connection
- * @sk: the new connection
+ * selinux_netlbl_inet_conn_request - Label an incoming stream connection
+ * @req: incoming connection request socket
*
* Description:
- * A new connection has been established on @sk so make sure it is labeled
- * correctly with the NetLabel susbsystem.
+ * A new incoming connection request is represented by @req, we need to label
+ * the new request_sock here and the stack will ensure the on-the-wire label
+ * will get preserved when a full sock is created once the connection handshake
+ * is complete. Returns zero on success, negative values on failure.
*
*/
-void selinux_netlbl_inet_conn_established(struct sock *sk, u16 family)
+int selinux_netlbl_inet_conn_request(struct request_sock *req, u16 family)
{
int rc;
- struct sk_security_struct *sksec = sk->sk_security;
- struct netlbl_lsm_secattr *secattr;
- struct inet_sock *sk_inet = inet_sk(sk);
- struct sockaddr_in addr;
+ struct netlbl_lsm_secattr secattr;
- if (sksec->nlbl_state != NLBL_REQUIRE)
- return;
+ if (family != PF_INET)
+ return 0;
- secattr = selinux_netlbl_sock_genattr(sk);
- if (secattr == NULL)
- return;
+ netlbl_secattr_init(&secattr);
+ rc = security_netlbl_sid_to_secattr(req->secid, &secattr);
+ if (rc != 0)
+ goto inet_conn_request_return;
+ rc = netlbl_req_setattr(req, &secattr);
+inet_conn_request_return:
+ netlbl_secattr_destroy(&secattr);
+ return rc;
+}
- rc = netlbl_sock_setattr(sk, secattr);
- switch (rc) {
- case 0:
+/**
+ * selinux_netlbl_inet_csk_clone - Initialize the newly created sock
+ * @sk: the new sock
+ *
+ * Description:
+ * A new connection has been established using @sk, we've already labeled the
+ * socket via the request_sock struct in selinux_netlbl_inet_conn_request() but
+ * we need to set the NetLabel state here since we now have a sock structure.
+ *
+ */
+void selinux_netlbl_inet_csk_clone(struct sock *sk, u16 family)
+{
+ struct sk_security_struct *sksec = sk->sk_security;
+
+ if (family == PF_INET)
sksec->nlbl_state = NLBL_LABELED;
- break;
- case -EDESTADDRREQ:
- /* no PF_INET6 support yet because we don't support any IPv6
- * labeling protocols */
- if (family != PF_INET) {
- sksec->nlbl_state = NLBL_UNSET;
- return;
- }
-
- addr.sin_family = family;
- addr.sin_addr.s_addr = sk_inet->daddr;
- if (netlbl_conn_setattr(sk, (struct sockaddr *)&addr,
- secattr) != 0) {
- /* we failed to label the connected socket (could be
- * for a variety of reasons, the actual "why" isn't
- * important here) so we have to go to our backup plan,
- * labeling the packets individually in the netfilter
- * local output hook. this is okay but we need to
- * adjust the MSS of the connection to take into
- * account any labeling overhead, since we don't know
- * the exact overhead at this point we'll use the worst
- * case value which is 40 bytes for IPv4 */
- struct inet_connection_sock *sk_conn = inet_csk(sk);
- sk_conn->icsk_ext_hdr_len += 40 -
- (sk_inet->opt ? sk_inet->opt->optlen : 0);
- sk_conn->icsk_sync_mss(sk, sk_conn->icsk_pmtu_cookie);
-
- sksec->nlbl_state = NLBL_REQSKB;
- } else
- sksec->nlbl_state = NLBL_CONNLABELED;
- break;
- default:
- /* note that we are failing to label the socket which could be
- * a bad thing since it means traffic could leave the system
- * without the desired labeling, however, all is not lost as
- * we have a check in selinux_netlbl_inode_permission() to
- * pick up the pieces that we might drop here because we can't
- * return an error code */
- break;
- }
+ else
+ sksec->nlbl_state = NLBL_UNSET;
}
/**
@@ -359,9 +338,30 @@ void selinux_netlbl_inet_conn_established(struct sock *sk, u16 family)
* SID. Returns zero values on success, negative values on failure.
*
*/
-int selinux_netlbl_socket_post_create(struct socket *sock)
+int selinux_netlbl_socket_post_create(struct sock *sk, u16 family)
{
- return selinux_netlbl_sock_setsid(sock->sk);
+ int rc;
+ struct sk_security_struct *sksec = sk->sk_security;
+ struct netlbl_lsm_secattr *secattr;
+
+ if (family != PF_INET)
+ return 0;
+
+ secattr = selinux_netlbl_sock_genattr(sk);
+ if (secattr == NULL)
+ return -ENOMEM;
+ rc = netlbl_sock_setattr(sk, secattr);
+ switch (rc) {
+ case 0:
+ sksec->nlbl_state = NLBL_LABELED;
+ break;
+ case -EDESTADDRREQ:
+ sksec->nlbl_state = NLBL_REQSKB;
+ rc = 0;
+ break;
+ }
+
+ return rc;
}
/**