firewall4/tests/03_rules/04_icmp

Testing handling of ICMP related options.

-- Testcase --
{%
	include("./root/usr/share/firewall4/main.uc", {
		getenv: function(varname) {
			switch (varname) {
			case 'ACTION':
				return 'print';
			}
		}
	})
%}
-- End --

-- File uci/helpers.json --
{}
-- End --

-- File uci/firewall.json --
{
	"rule": [
		{
			".description": "Proto 'icmp' maps to a single IPv4 and IPv6 rule",
			"proto": "icmp",
			"name": "ICMP rule #1"
		},
		{
			".description": "Proto 'icmpv6' maps to IPv6 rule only",
			"proto": "icmpv6",
			"name": "ICMP rule #2",
		},
		{
			".description": "Proto 'ipv6-icmp' is an alias for 'icmpv6'",
			"proto": "ipv6-icmp",
			"name": "ICMP rule #3",
		},
		{
			".description": "Proto 'icmp' with IPv4 specific types inhibits IPv6 rule",
			"proto": "icmp",
			"name": "ICMP rule #4",
			"icmp_type": [ "ip-header-bad" ]
		},
		{
			".description": "Proto 'icmp' with IPv6 specific types inhibits IPv4 rule",
			"proto": "icmp",
			"name": "ICMP rule #5",
			"icmp_type": [ "neighbour-advertisement" ]
		}
	]
}
-- End --

-- Expect stdout --
table inet fw4
flush table inet fw4

table inet fw4 {
	#
	# Defines
	#


	#
	# User includes
	#

	include "/etc/nftables.d/*.nft"


	#
	# Filter rules
	#

	chain input {
		type filter hook input priority filter; policy drop;

		iif "lo" accept comment "!fw4: Accept traffic from loopback"

		ct state vmap { established : accept, related : accept } comment "!fw4: Handle inbound flows"
	}

	chain forward {
		type filter hook forward priority filter; policy drop;

		ct state vmap { established : accept, related : accept } comment "!fw4: Handle forwarded flows"
	}

	chain output {
		type filter hook output priority filter; policy drop;

		oif "lo" accept comment "!fw4: Accept traffic towards loopback"

		ct state vmap { established : accept, related : accept } comment "!fw4: Handle outbound flows"
		meta l4proto { "icmp", "ipv6-icmp" } counter comment "!fw4: ICMP rule #1"
		meta nfproto ipv6 meta l4proto ipv6-icmp counter comment "!fw4: ICMP rule #2"
		meta nfproto ipv6 meta l4proto ipv6-icmp counter comment "!fw4: ICMP rule #3"
		meta nfproto ipv4 icmp type . icmp code { 12 . 0 } counter comment "!fw4: ICMP rule #4"
		meta nfproto ipv6 icmpv6 type . icmpv6 code { 136 . 0 } counter comment "!fw4: ICMP rule #5"
	}

	chain prerouting {
		type filter hook prerouting priority filter; policy accept;
	}

	chain handle_reject {
		meta l4proto tcp reject with tcp reset comment "!fw4: Reject TCP traffic"
		reject with icmpx type port-unreachable comment "!fw4: Reject any other traffic"
	}


	#
	# NAT rules
	#

	chain dstnat {
		type nat hook prerouting priority dstnat; policy accept;
	}

	chain srcnat {
		type nat hook postrouting priority srcnat; policy accept;
	}


	#
	# Raw rules (notrack)
	#

	chain raw_prerouting {
		type filter hook prerouting priority raw; policy accept;
	}

	chain raw_output {
		type filter hook output priority raw; policy accept;
	}


	#
	# Mangle rules
	#

	chain mangle_prerouting {
		type filter hook prerouting priority mangle; policy accept;
	}

	chain mangle_postrouting {
		type filter hook postrouting priority mangle; policy accept;
	}

	chain mangle_input {
		type filter hook input priority mangle; policy accept;
	}

	chain mangle_output {
		type route hook output priority mangle; policy accept;
	}

	chain mangle_forward {
		type filter hook forward priority mangle; policy accept;
	}
}
-- End --