[INET]: Use port unreachable instead of proto for tunnels

This patch changes GRE and SIT to generate port unreachable instead of
protocol unreachable errors when we can't find a matching tunnel for a
packet.

This removes the ambiguity as to whether the error is caused by no
tunnel being found or by the lack of support for the given tunnel
type.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 2 insertions, 2 deletions

diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index 9981dcd68f11..ab99bebdcdc8 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c
@@ -656,7 +656,7 @@ static int ipgre_rcv(struct sk_buff *skb)
                 read_unlock(&ipgre_lock);
                 return(0);
         }
-        icmp_send(skb, ICMP_DEST_UNREACH, ICMP_PROT_UNREACH, 0);
+        icmp_send(skb, ICMP_DEST_UNREACH, ICMP_PORT_UNREACH, 0);
 
 drop:
         read_unlock(&ipgre_lock);
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index c2d3e17beae6..6578c3080f47 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -397,7 +397,7 @@ static int ipip6_rcv(struct sk_buff *skb)
                 return 0;
         }
 
-        icmp_send(skb, ICMP_DEST_UNREACH, ICMP_PROT_UNREACH, 0);
+        icmp_send(skb, ICMP_DEST_UNREACH, ICMP_PORT_UNREACH, 0);
         kfree_skb(skb);
         read_unlock(&ipip6_lock);
 out: