rdma_copy_addr_sub
rdma_copy_addr_sub(dev_addr->src_dev_addr, if_getlladdr(dev),
rdma_copy_addr_sub(dev_addr->broadcast, if_getbroadcastaddr(dev),
rdma_copy_addr_sub(dev_addr->dst_dev_addr, dst_dev_addr,
rdma_copy_addr_sub(edst, LLADDR((struct sockaddr_dl *)llsa),
rdma_copy_addr_sub(edst, if_getbroadcastaddr(ifp),