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#!/bin/bash
# test a kernel netns loading a simple ruleset
IP=$(which ip)
if [ ! -x "$IP" ] ; then
echo "E: no ip binary" >&2
exit 1
fi
function netns_exec()
{
# $1: netns_name $2: command
$IP netns exec $1 $2
if [ $? -ne 0 ] ; then
echo "E: failed to execute command in netns $1: $2" >&2
$IP netns del $1
exit 1
fi
}
NETNS_NAME=$(basename "$0")
$IP netns add $NETNS_NAME
if [ $? -ne 0 ] ; then
echo "E: unable to create netns" >&2
exit 1
fi
netns_exec $NETNS_NAME "$NFT add table ip t"
netns_exec $NETNS_NAME "$NFT add chain ip t c"
netns_exec $NETNS_NAME "$NFT add chain ip t other"
netns_exec $NETNS_NAME "$NFT add set ip t s { type ipv4_addr; }"
netns_exec $NETNS_NAME "$NFT add element ip t s {1.1.0.0 }"
netns_exec $NETNS_NAME "$NFT add rule ip t c ct state new"
netns_exec $NETNS_NAME "$NFT add rule ip t c udp dport { 12345 }"
netns_exec $NETNS_NAME "$NFT add rule ip t c ip saddr @s drop"
netns_exec $NETNS_NAME "$NFT add rule ip t c jump other"
RULESET="table ip t {
set s {
type ipv4_addr
elements = { 1.1.0.0}
}
chain c {
ct state new
udp dport { 12345}
ip saddr @s drop
jump other
}
chain other {
}
}"
KERNEL_RULESET="$($IP netns exec $NETNS_NAME $NFT list ruleset -nn)"
$IP netns del $NETNS_NAME
if [ "$RULESET" != "$KERNEL_RULESET" ] ; then
DIFF="$(which diff)"
[ -x $DIFF ] && $DIFF -u <(echo "$RULESET") <(echo "$KERNEL_RULESET")
exit 1
fi
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