- PL3791 fix: Suppress ICMP Unreachable if the port was bound to a (presumably raw...

diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index ad097f5..d956482 100644 (file)
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -1237,8 +1237,11 @@ int udp_rcv(struct sk_buff *skb)
        if (udp_checksum_complete(skb))
                goto csum_error;
 
-       UDP_INC_STATS_BH(UDP_MIB_NOPORTS);
-       icmp_send(skb, ICMP_DEST_UNREACH, ICMP_PORT_UNREACH, 0);
+       /* VNET: Suppress ICMP Unreachable if the port was bound to a (presumably raw) socket */
+       if (!skb->sk) {
+               UDP_INC_STATS_BH(UDP_MIB_NOPORTS);
+               icmp_send(skb, ICMP_DEST_UNREACH, ICMP_PORT_UNREACH, 0);
+       }
 
        /*
         * Hmm.  We got an UDP packet to a port to which we