datapath: Add multicast tunnel support.

[sliver-openvswitch.git] / datapath / vport-gre.c

diff --git a/datapath/vport-gre.c b/datapath/vport-gre.c
index cc64d12..95ac4bb 100644 (file)
--- a/datapath/vport-gre.c
+++ b/datapath/vport-gre.c
@@ -188,6 +188,8 @@ static void gre_err(struct sk_buff *skb, u32 info)
                return;
 
        iph = (struct iphdr *)skb->data;
+       if (ipv4_is_multicast(iph->daddr))
+               return;
 
        tunnel_hdr_len = parse_header(iph, &flags, &key);
        if (tunnel_hdr_len < 0)