table t {
        set candidates_ipv4 {
                type ipv4_addr . inet_service
                size 65535
                flags dynamic,timeout
        }

        chain input {
                tcp dport 10003 ip saddr . tcp dport @candidates_ipv4 add @candidates_ipv4 { ip saddr . 10 :0004 timeout 1s }
        }
}
