table ip ipfoo {
	map x {
		type ipv4_addr : ipv4_addr
	}

	chain c {
		type nat hook prerouting priority dstnat; policy accept;
		iifname != "foobar" accept
		dnat to ip daddr map @x
		ip saddr 10.1.1.1 dnat to 10.2.3.4
		ip saddr 10.1.1.2 tcp dport 42 dnat to 10.2.3.4:4242
	}
}