selftests: netfilter: nft_synproxy.sh: move to lib.sh infra

#!/bin/bash

# SPDX-License-Identifier: GPL-2.0

#

# Kselftest framework requirement - SKIP code is 4.

ksft_skip=4

ret=0

rnd=$(mktemp -u XXXXXXXX)

nsr="nsr-$rnd"	# synproxy machine

ns1="ns1-$rnd"  # iperf client

ns2="ns2-$rnd"  # iperf server

source lib.sh

checktool (){

	if ! $1 > /dev/null 2>&1; then

		echo "SKIP: Could not $2"

		exit $ksft_skip

	fi

}

ret=0

checktool "nft --version" "run test without nft tool"

checktool "ip -Version" "run test without ip tool"

checktool "iperf3 --version" "run test without iperf3"

checktool "ip netns add $nsr" "create net namespace"

modprobe -q nf_conntrack

setup_ns nsr ns1 ns2

ip netns add $ns1

ip netns add $ns2

modprobe -q nf_conntrack

cleanup() {

	ip netns pids $ns1 | xargs kill 2>/dev/null

	ip netns pids $ns2 | xargs kill 2>/dev/null

	ip netns del $ns1

	ip netns del $ns2

	ip netns pids "$ns1" | xargs kill 2>/dev/null

	ip netns pids "$ns2" | xargs kill 2>/dev/null

	ip netns del $nsr

	cleanup_all_ns

}

trap cleanup EXIT

ip link add veth0 netns $nsr type veth peer name eth0 netns $ns1

ip link add veth1 netns $nsr type veth peer name eth0 netns $ns2

ip link add veth0 netns "$nsr" type veth peer name eth0 netns "$ns1"

ip link add veth1 netns "$nsr" type veth peer name eth0 netns "$ns2"

for dev in lo veth0 veth1; do

ip -net $nsr link set $dev up

for dev in veth0 veth1; do

	ip -net "$nsr" link set "$dev" up

done

ip -net $nsr addr add 10.0.1.1/24 dev veth0

ip -net $nsr addr add 10.0.2.1/24 dev veth1

ip -net "$nsr" addr add 10.0.1.1/24 dev veth0

ip -net "$nsr" addr add 10.0.2.1/24 dev veth1

ip netns exec $nsr sysctl -q net.ipv4.conf.veth0.forwarding=1

ip netns exec $nsr sysctl -q net.ipv4.conf.veth1.forwarding=1

ip netns exec $nsr sysctl -q net.netfilter.nf_conntrack_tcp_loose=0

ip netns exec "$nsr" sysctl -q net.ipv4.conf.veth0.forwarding=1

ip netns exec "$nsr" sysctl -q net.ipv4.conf.veth1.forwarding=1

ip netns exec "$nsr" sysctl -q net.netfilter.nf_conntrack_tcp_loose=0

for n in $ns1 $ns2; do

  ip -net $n link set lo up

  ip -net $n link set eth0 up

  ip -net "$n" link set eth0 up

done

ip -net $ns1 addr add 10.0.1.99/24 dev eth0

ip -net $ns2 addr add 10.0.2.99/24 dev eth0

ip -net $ns1 route add default via 10.0.1.1

ip -net $ns2 route add default via 10.0.2.1

ip -net "$ns1" addr add 10.0.1.99/24 dev eth0

ip -net "$ns2" addr add 10.0.2.99/24 dev eth0

ip -net "$ns1" route add default via 10.0.1.1

ip -net "$ns2" route add default via 10.0.2.1

# test basic connectivity

if ! ip netns exec $ns1 ping -c 1 -q 10.0.2.99 > /dev/null; then

if ! ip netns exec "$ns1" ping -c 1 -q 10.0.2.99 > /dev/null; then

  echo "ERROR: $ns1 cannot reach $ns2" 1>&2

  exit 1

fi

if ! ip netns exec $ns2 ping -c 1 -q 10.0.1.99 > /dev/null; then

if ! ip netns exec "$ns2" ping -c 1 -q 10.0.1.99 > /dev/null; then

  echo "ERROR: $ns2 cannot reach $ns1" 1>&2

  exit 1

fi

ip netns exec $ns2 iperf3 -s > /dev/null 2>&1 &

ip netns exec "$ns2" iperf3 -s > /dev/null 2>&1 &

# ip netns exec $nsr tcpdump -vvv -n -i veth1 tcp | head -n 10 &

sleep 1

ip netns exec $nsr nft -f - <<EOF

ip netns exec "$nsr" nft -f - <<EOF

table inet filter {

   chain prerouting {

      type filter hook prerouting priority -300; policy accept;

	exit $ksft_skip

fi

ip netns exec $ns1 timeout 5 iperf3 -c 10.0.2.99 -n $((1 * 1024 * 1024)) > /dev/null

if [ $? -ne 0 ]; then

if ! ip netns exec "$ns1" timeout 5 iperf3 -c 10.0.2.99 -n $((1 * 1024 * 1024)) > /dev/null; then

	echo "FAIL: iperf3 returned an error" 1>&2

	ret=$?

	ip netns exec $nsr nft list ruleset

	ret=1

	ip netns exec "$nsr" nft list ruleset

else

	echo "PASS: synproxy connection successful"

fi