Add support for LISP tunneling

[sliver-openvswitch.git] / datapath / tunnel.c

diff --git a/datapath/tunnel.c b/datapath/tunnel.c
index 3964208..a05cf54 100644 (file)
--- a/datapath/tunnel.c
+++ b/datapath/tunnel.c
@@ -512,6 +512,21 @@ free_frags:
        return sent_len;
 }
 
+/* Compute source UDP port for outgoing packet.
+ * Currently we use the flow hash.
+ */
+u16 ovs_tnl_get_src_port(struct sk_buff *skb)
+{
+       int low;
+       int high;
+       unsigned int range;
+       u32 hash = OVS_CB(skb)->flow->hash;
+
+       inet_get_local_port_range(&low, &high);
+       range = (high - low) + 1;
+       return (((u64) hash * range) >> 32) + low;
+}
+
 int ovs_tnl_send(struct vport *vport, struct sk_buff *skb)
 {
        struct tnl_vport *tnl_vport = tnl_vport_priv(vport);