conn_key_to_tuple(const struct conn_key *key, struct ct_dpif_tuple *tuple)
{
    if (key->dl_type == htons(ETH_TYPE_IP)) {
        tuple->l3_type = AF_INET;
    } else if (key->dl_type == htons(ETH_TYPE_IPV6)) {
        tuple->l3_type = AF_INET6;
    }
    tuple->ip_proto = key->nw_proto;
    ct_endpoint_to_ct_dpif_inet_addr(&key->src.addr, &tuple->src,
                                     key->dl_type);
    ct_endpoint_to_ct_dpif_inet_addr(&key->dst.addr, &tuple->dst,
                                     key->dl_type);

    if (key->nw_proto == IPPROTO_ICMP || key->nw_proto == IPPROTO_ICMPV6) {
        tuple->icmp_id = key->src.icmp_id;
        tuple->icmp_type = key->src.icmp_type;
        tuple->icmp_code = key->src.icmp_code;
    } else {
        tuple->src_port = key->src.port;
        tuple->dst_port = key->dst.port;
    }
}
conn_key_to_tuple(const struct conn_key *key, struct ct_dpif_tuple *tuple)
{
    if (key->dl_type == htons(ETH_TYPE_IP)) {
        tuple->l3_type = AF_INET;
    } else if (key->dl_type == htons(ETH_TYPE_IPV6)) {
        tuple->l3_type = AF_INET6;
    }
    tuple->ip_proto = key->nw_proto;
    ct_endpoint_to_ct_dpif_inet_addr(&key->src.addr, &tuple->src,
                                     key->dl_type);
    ct_endpoint_to_ct_dpif_inet_addr(&key->dst.addr, &tuple->dst,
                                     key->dl_type);

    if (key->nw_proto == IPPROTO_ICMP || key->nw_proto == IPPROTO_ICMPV6) {
        tuple->icmp_id = key->src.icmp_id;
        tuple->icmp_type = key->src.icmp_type;
        tuple->icmp_code = key->src.icmp_code;
    } else {
        tuple->src_port = key->src.port;
        tuple->dst_port = key->dst.port;
    }
}