datapath: Add multicast tunnel support.

[sliver-openvswitch.git] / lib / packets.h

diff --git a/lib/packets.h b/lib/packets.h
index f5f473c..8487754 100644 (file)
--- a/lib/packets.h
+++ b/lib/packets.h
@@ -291,6 +291,11 @@ ip_is_cidr(ovs_be32 netmask)
     uint32_t x = ~ntohl(netmask);
     return !(x & (x + 1));
 }
+static inline bool
+ip_is_multicast(ovs_be32 ip)
+{
+    return (ip & htonl(0xf0000000)) == htonl(0xe0000000);
+}
 int ip_count_cidr_bits(ovs_be32 netmask);
 void ip_format_masked(ovs_be32 ip, ovs_be32 mask, struct ds *);