table ip t {
	set s1 {
		type ipv4_addr . ipv4_addr . inet_service
		size 65535
		flags dynamic,timeout
		timeout 3h
	}

	chain c1 {
		update @s1 { ip saddr . 10.180.0.4 . 80 }
	}

	chain c2 {
		ip saddr . 1.2.3.4 . 80 @s1 goto c1
	}
}