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#! /sbin/nft -nf
#
# Examples of set and map usage
#
# symbolic anonymous set definition built from symbolic singleton definitions
define int_if1 = eth0
define int_if2 = eth1
define int_ifs = { $int_if1, $int_if2 }
define ext_if1 = eth2
define ext_if2 = eth3
define ext_ifs = { $ext_if1, $ext_if2 }
# recursive symbolic anonymous set definition
define local_ifs = { $int_ifs, $ext_ifs }
# symbolic anonymous set definition
define tcp_ports = { ssh, domain, http, 123-125 }
delete table filter
table filter {
# named set of type ifindex
set local_ifs {
type ifindex
}
# named map of type ifindex => ipv4_address
map nat_map {
type ifindex => ipv4_address
}
map jump_map {
type ifindex => verdict
}
chain input_1 { counter; }
chain input_2 { counter; }
chain input {
hook NF_INET_LOCAL_IN 0
# symbolic anonymous sets
meta iif $local_ifs tcp dport $tcp_ports counter
# literal anonymous set
meta iif { eth0, eth1 } counter
meta iif @local_ifs counter
meta iif vmap @jump_map
#meta iif vmap { eth0 => jump input1, eth1 => jump input2 }
}
}
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