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Commit d66a8acb authored by Piotr Sawicki's avatar Piotr Sawicki Committed by Casey Schaufler
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Smack: Inform peer that IPv6 traffic has been blocked 



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.

Signed-off-by: default avatarPiotr Sawicki <p.sawicki2@partner.samsung.com>
Signed-off-by: default avatarCasey Schaufler <casey@schaufler-ca.com>
parent a07ef951

security/smack/smack_lsm.c

+4 −0
Original line number Diff line number Diff line
@@ -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>
@@ -4009,6 +4010,9 @@ 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 */

	}