rdsv3_ext_header_rdma_dest
struct rdsv3_ext_header_rdma_dest ext_hdr;
[RDSV3_EXTHDR_RDMA_DEST] = sizeof (struct rdsv3_ext_header_rdma_dest),
sizeof (struct rdsv3_ext_header_rdma_dest),
struct rdsv3_ext_header_rdma_dest rdma_dest;