In this patch we're sending an ICMPv6 message to a peer to
immediately inform it that making a connection is not possible.
In case of TCP connections, without this change, the peer
will be waiting until a connection timeout is exceeded.
---
security/smack/smack_lsm.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index c2282ac..cee8335 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -28,6 +28,7 @@
#include <linux/tcp.h>
#include <linux/udp.h>
#include <linux/dccp.h>
+#include <linux/icmpv6.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/pipe_fs_i.h>
@@ -4010,6 +4011,8 @@ static int smack_socket_sock_rcv_skb(struct sock
*sk, struct sk_buff *skb)
#ifdef SMACK_IPV6_PORT_LABELING
rc = smk_ipv6_port_check(sk, &sadd, SMK_RECEIVING);
#endif /* SMACK_IPV6_PORT_LABELING */
+ if (rc != 0)
+ icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_ADM_PROHIBITED, 0);
break;
#endif /* CONFIG_IPV6 */
}
--
2.7.4
--
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