2 files changed, 133 insertions, 0 deletions

diff --git a/security/selinux/include/objsec.h b/security/selinux/include/objsec.h
index 79b9e0af19a0..0a39bfd1319f 100644
--- a/security/selinux/include/objsec.h
+++ b/security/selinux/include/objsec.h
@@ -101,6 +101,14 @@ struct sk_security_struct {
         struct sock *sk;                /* back pointer to sk object */
         u32 sid;                        /* SID of this object */
         u32 peer_sid;                   /* SID of peer */
+#ifdef CONFIG_NETLABEL
+        u16 sclass;                     /* sock security class */
+        enum {                          /* NetLabel state */
+                NLBL_UNSET = 0,
+                NLBL_REQUIRE,
+                NLBL_LABELED,
+        } nlbl_state;
+#endif
 };
 
 struct key_security_struct {
diff --git a/security/selinux/include/selinux_netlabel.h b/security/selinux/include/selinux_netlabel.h
new file mode 100644
index 000000000000..88c463eef1e1
--- /dev/null
+++ b/security/selinux/include/selinux_netlabel.h
@@ -0,0 +1,125 @@
+/*
+ * 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