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authorPaul Moore <paul.moore@hp.com>2008-10-10 10:16:33 -0400
committerPaul Moore <paul.moore@hp.com>2008-10-10 10:16:33 -0400
commit014ab19a69c325f52d7bae54ceeda73d6307ae0c (patch)
tree8a69c490accb7d5454bdfeb8c078d846729aeb60 /net/netlabel
parent948bf85c1bc9a84754786a9d5dd99b7ecc46451e (diff)
downloadlinux-2.6.34-ux500-014ab19a69c325f52d7bae54ceeda73d6307ae0c.tar.gz
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>
Diffstat (limited to 'net/netlabel')
-rw-r--r--net/netlabel/netlabel_kapi.c78
1 files changed, 77 insertions, 1 deletions
diff --git a/net/netlabel/netlabel_kapi.c b/net/netlabel/netlabel_kapi.c
index cc8047d1f50..78fc557689b 100644
--- a/net/netlabel/netlabel_kapi.c
+++ b/net/netlabel/netlabel_kapi.c
@@ -10,7 +10,7 @@
*/
/*
- * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
+ * (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008
*
* 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
@@ -456,6 +456,20 @@ socket_setattr_return:
}
/**
+ * netlbl_sock_delattr - Delete all the NetLabel labels on a socket
+ * @sk: the socket
+ *
+ * Description:
+ * Remove all the NetLabel labeling from @sk. The caller is responsible for
+ * ensuring that @sk is locked.
+ *
+ */
+void netlbl_sock_delattr(struct sock *sk)
+{
+ cipso_v4_sock_delattr(sk);
+}
+
+/**
* netlbl_sock_getattr - Determine the security attributes of a sock
* @sk: the sock
* @secattr: the security attributes
@@ -473,6 +487,68 @@ int netlbl_sock_getattr(struct sock *sk, struct netlbl_lsm_secattr *secattr)
}
/**
+ * netlbl_conn_setattr - Label a connected socket using the correct protocol
+ * @sk: the socket to label
+ * @addr: the destination address
+ * @secattr: the security attributes
+ *
+ * Description:
+ * Attach the correct label to the given connected socket using the security
+ * attributes specified in @secattr. The caller is responsible for ensuring
+ * that @sk is locked. Returns zero on success, negative values on failure.
+ *
+ */
+int netlbl_conn_setattr(struct sock *sk,
+ struct sockaddr *addr,
+ const struct netlbl_lsm_secattr *secattr)
+{
+ int ret_val;
+ struct sockaddr_in *addr4;
+ struct netlbl_domaddr4_map *af4_entry;
+
+ rcu_read_lock();
+ switch (addr->sa_family) {
+ case AF_INET:
+ addr4 = (struct sockaddr_in *)addr;
+ af4_entry = netlbl_domhsh_getentry_af4(secattr->domain,
+ addr4->sin_addr.s_addr);
+ if (af4_entry == NULL) {
+ ret_val = -ENOENT;
+ goto conn_setattr_return;
+ }
+ switch (af4_entry->type) {
+ case NETLBL_NLTYPE_CIPSOV4:
+ ret_val = cipso_v4_sock_setattr(sk,
+ af4_entry->type_def.cipsov4,
+ secattr);
+ break;
+ case NETLBL_NLTYPE_UNLABELED:
+ /* just delete the protocols we support for right now
+ * but we could remove other protocols if needed */
+ cipso_v4_sock_delattr(sk);
+ ret_val = 0;
+ break;
+ default:
+ ret_val = -ENOENT;
+ }
+ break;
+#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
+ case AF_INET6:
+ /* since we don't support any IPv6 labeling protocols right
+ * now we can optimize everything away until we do */
+ ret_val = 0;
+ break;
+#endif /* IPv6 */
+ default:
+ ret_val = 0;
+ }
+
+conn_setattr_return:
+ rcu_read_unlock();
+ return ret_val;
+}
+
+/**
* netlbl_skbuff_setattr - Label a packet using the correct protocol
* @skb: the packet
* @family: protocol family