#!/bin/bash
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#
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# This test is for basic NAT functionality: snat, dnat, redirect, masquerade.
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#
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# Kselftest framework requirement - SKIP code is 4.
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ksft_skip=4
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ret=0
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nft --version > /dev/null 2>&1
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if [ $? -ne 0 ];then
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echo "SKIP: Could not run test without nft tool"
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exit $ksft_skip
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fi
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ip -Version > /dev/null 2>&1
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if [ $? -ne 0 ];then
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echo "SKIP: Could not run test without ip tool"
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exit $ksft_skip
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fi
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ip netns add ns0
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ip netns add ns1
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ip netns add ns2
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ip link add veth0 netns ns0 type veth peer name eth0 netns ns1 > /dev/null 2>&1
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if [ $? -ne 0 ];then
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echo "SKIP: No virtual ethernet pair device support in kernel"
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exit $ksft_skip
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fi
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ip link add veth1 netns ns0 type veth peer name eth0 netns ns2
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ip -net ns0 link set lo up
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ip -net ns0 link set veth0 up
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ip -net ns0 addr add 10.0.1.1/24 dev veth0
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ip -net ns0 addr add dead:1::1/64 dev veth0
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ip -net ns0 link set veth1 up
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ip -net ns0 addr add 10.0.2.1/24 dev veth1
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ip -net ns0 addr add dead:2::1/64 dev veth1
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for i in 1 2; do
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ip -net ns$i link set lo up
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ip -net ns$i link set eth0 up
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ip -net ns$i addr add 10.0.$i.99/24 dev eth0
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ip -net ns$i route add default via 10.0.$i.1
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ip -net ns$i addr add dead:$i::99/64 dev eth0
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ip -net ns$i route add default via dead:$i::1
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done
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bad_counter()
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{
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local ns=$1
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local counter=$2
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local expect=$3
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echo "ERROR: $counter counter in $ns has unexpected value (expected $expect)" 1>&2
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ip netns exec $ns nft list counter inet filter $counter 1>&2
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}
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check_counters()
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{
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ns=$1
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local lret=0
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cnt=$(ip netns exec $ns nft list counter inet filter ns0in | grep -q "packets 1 bytes 84")
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if [ $? -ne 0 ]; then
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bad_counter $ns ns0in "packets 1 bytes 84"
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lret=1
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fi
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cnt=$(ip netns exec $ns nft list counter inet filter ns0out | grep -q "packets 1 bytes 84")
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if [ $? -ne 0 ]; then
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bad_counter $ns ns0out "packets 1 bytes 84"
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lret=1
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fi
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expect="packets 1 bytes 104"
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cnt=$(ip netns exec $ns nft list counter inet filter ns0in6 | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter $ns ns0in6 "$expect"
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lret=1
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fi
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cnt=$(ip netns exec $ns nft list counter inet filter ns0out6 | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter $ns ns0out6 "$expect"
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lret=1
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fi
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return $lret
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}
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check_ns0_counters()
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{
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local ns=$1
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local lret=0
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cnt=$(ip netns exec ns0 nft list counter inet filter ns0in | grep -q "packets 0 bytes 0")
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if [ $? -ne 0 ]; then
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bad_counter ns0 ns0in "packets 0 bytes 0"
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lret=1
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fi
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cnt=$(ip netns exec ns0 nft list counter inet filter ns0in6 | grep -q "packets 0 bytes 0")
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if [ $? -ne 0 ]; then
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bad_counter ns0 ns0in6 "packets 0 bytes 0"
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lret=1
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fi
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cnt=$(ip netns exec ns0 nft list counter inet filter ns0out | grep -q "packets 0 bytes 0")
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if [ $? -ne 0 ]; then
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bad_counter ns0 ns0out "packets 0 bytes 0"
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lret=1
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fi
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cnt=$(ip netns exec ns0 nft list counter inet filter ns0out6 | grep -q "packets 0 bytes 0")
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if [ $? -ne 0 ]; then
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bad_counter ns0 ns0out6 "packets 0 bytes 0"
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lret=1
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fi
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for dir in "in" "out" ; do
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expect="packets 1 bytes 84"
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cnt=$(ip netns exec ns0 nft list counter inet filter ${ns}${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns0 $ns$dir "$expect"
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lret=1
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fi
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expect="packets 1 bytes 104"
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cnt=$(ip netns exec ns0 nft list counter inet filter ${ns}${dir}6 | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns0 $ns$dir6 "$expect"
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lret=1
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fi
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done
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return $lret
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}
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reset_counters()
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{
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for i in 0 1 2;do
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ip netns exec ns$i nft reset counters inet > /dev/null
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done
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}
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test_local_dnat6()
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{
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local lret=0
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ip netns exec ns0 nft -f - <<EOF
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table ip6 nat {
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chain output {
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type nat hook output priority 0; policy accept;
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ip6 daddr dead:1::99 dnat to dead:2::99
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}
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}
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EOF
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if [ $? -ne 0 ]; then
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echo "SKIP: Could not add add ip6 dnat hook"
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return $ksft_skip
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fi
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# ping netns1, expect rewrite to netns2
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ip netns exec ns0 ping -q -c 1 dead:1::99 > /dev/null
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if [ $? -ne 0 ]; then
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lret=1
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echo "ERROR: ping6 failed"
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return $lret
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fi
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expect="packets 0 bytes 0"
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for dir in "in6" "out6" ; do
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cnt=$(ip netns exec ns0 nft list counter inet filter ns1${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns0 ns1$dir "$expect"
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lret=1
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fi
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done
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expect="packets 1 bytes 104"
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for dir in "in6" "out6" ; do
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cnt=$(ip netns exec ns0 nft list counter inet filter ns2${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns0 ns2$dir "$expect"
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lret=1
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fi
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done
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# expect 0 count in ns1
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expect="packets 0 bytes 0"
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for dir in "in6" "out6" ; do
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cnt=$(ip netns exec ns1 nft list counter inet filter ns0${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns1 ns0$dir "$expect"
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lret=1
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fi
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done
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# expect 1 packet in ns2
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expect="packets 1 bytes 104"
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for dir in "in6" "out6" ; do
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cnt=$(ip netns exec ns2 nft list counter inet filter ns0${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns2 ns0$dir "$expect"
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lret=1
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fi
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done
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test $lret -eq 0 && echo "PASS: ipv6 ping to ns1 was NATted to ns2"
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ip netns exec ns0 nft flush chain ip6 nat output
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return $lret
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}
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test_local_dnat()
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{
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local lret=0
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ip netns exec ns0 nft -f - <<EOF
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table ip nat {
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chain output {
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type nat hook output priority 0; policy accept;
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ip daddr 10.0.1.99 dnat to 10.0.2.99
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}
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}
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EOF
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# ping netns1, expect rewrite to netns2
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ip netns exec ns0 ping -q -c 1 10.0.1.99 > /dev/null
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if [ $? -ne 0 ]; then
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lret=1
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echo "ERROR: ping failed"
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return $lret
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fi
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expect="packets 0 bytes 0"
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for dir in "in" "out" ; do
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cnt=$(ip netns exec ns0 nft list counter inet filter ns1${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns0 ns1$dir "$expect"
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lret=1
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fi
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done
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expect="packets 1 bytes 84"
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for dir in "in" "out" ; do
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cnt=$(ip netns exec ns0 nft list counter inet filter ns2${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns0 ns2$dir "$expect"
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lret=1
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fi
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done
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# expect 0 count in ns1
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expect="packets 0 bytes 0"
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for dir in "in" "out" ; do
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cnt=$(ip netns exec ns1 nft list counter inet filter ns0${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns1 ns0$dir "$expect"
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lret=1
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fi
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done
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# expect 1 packet in ns2
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expect="packets 1 bytes 84"
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for dir in "in" "out" ; do
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cnt=$(ip netns exec ns2 nft list counter inet filter ns0${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns2 ns0$dir "$expect"
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lret=1
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fi
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done
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test $lret -eq 0 && echo "PASS: ping to ns1 was NATted to ns2"
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ip netns exec ns0 nft flush chain ip nat output
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reset_counters
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ip netns exec ns0 ping -q -c 1 10.0.1.99 > /dev/null
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if [ $? -ne 0 ]; then
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lret=1
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echo "ERROR: ping failed"
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return $lret
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fi
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expect="packets 1 bytes 84"
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for dir in "in" "out" ; do
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cnt=$(ip netns exec ns0 nft list counter inet filter ns1${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns1 ns1$dir "$expect"
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lret=1
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fi
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done
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expect="packets 0 bytes 0"
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for dir in "in" "out" ; do
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cnt=$(ip netns exec ns0 nft list counter inet filter ns2${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns0 ns2$dir "$expect"
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lret=1
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fi
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done
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# expect 1 count in ns1
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expect="packets 1 bytes 84"
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for dir in "in" "out" ; do
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cnt=$(ip netns exec ns1 nft list counter inet filter ns0${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns0 ns0$dir "$expect"
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lret=1
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fi
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done
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# expect 0 packet in ns2
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expect="packets 0 bytes 0"
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for dir in "in" "out" ; do
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cnt=$(ip netns exec ns2 nft list counter inet filter ns0${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns2 ns2$dir "$expect"
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lret=1
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fi
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done
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test $lret -eq 0 && echo "PASS: ping to ns1 OK after nat output chain flush"
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return $lret
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}
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test_masquerade6()
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{
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local lret=0
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ip netns exec ns0 sysctl net.ipv6.conf.all.forwarding=1 > /dev/null
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ip netns exec ns2 ping -q -c 1 dead:1::99 > /dev/null # ping ns2->ns1
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if [ $? -ne 0 ] ; then
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echo "ERROR: cannot ping ns1 from ns2 via ipv6"
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return 1
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lret=1
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fi
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expect="packets 1 bytes 104"
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for dir in "in6" "out6" ; do
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cnt=$(ip netns exec ns1 nft list counter inet filter ns2${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns1 ns2$dir "$expect"
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lret=1
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fi
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cnt=$(ip netns exec ns2 nft list counter inet filter ns1${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns2 ns1$dir "$expect"
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lret=1
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fi
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done
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reset_counters
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# add masquerading rule
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ip netns exec ns0 nft -f - <<EOF
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table ip6 nat {
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chain postrouting {
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type nat hook postrouting priority 0; policy accept;
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meta oif veth0 masquerade
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}
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}
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EOF
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ip netns exec ns2 ping -q -c 1 dead:1::99 > /dev/null # ping ns2->ns1
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if [ $? -ne 0 ] ; then
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echo "ERROR: cannot ping ns1 from ns2 with active ipv6 masquerading"
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lret=1
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fi
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# ns1 should have seen packets from ns0, due to masquerade
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expect="packets 1 bytes 104"
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for dir in "in6" "out6" ; do
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cnt=$(ip netns exec ns1 nft list counter inet filter ns0${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns1 ns0$dir "$expect"
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lret=1
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fi
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cnt=$(ip netns exec ns2 nft list counter inet filter ns1${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns2 ns1$dir "$expect"
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lret=1
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fi
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done
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# ns1 should not have seen packets from ns2, due to masquerade
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expect="packets 0 bytes 0"
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for dir in "in6" "out6" ; do
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cnt=$(ip netns exec ns1 nft list counter inet filter ns2${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns1 ns0$dir "$expect"
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lret=1
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fi
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cnt=$(ip netns exec ns1 nft list counter inet filter ns2${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns2 ns1$dir "$expect"
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lret=1
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fi
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done
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ip netns exec ns0 nft flush chain ip6 nat postrouting
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if [ $? -ne 0 ]; then
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echo "ERROR: Could not flush ip6 nat postrouting" 1>&2
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lret=1
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fi
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test $lret -eq 0 && echo "PASS: IPv6 masquerade for ns2"
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return $lret
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}
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test_masquerade()
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{
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local lret=0
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ip netns exec ns0 sysctl net.ipv4.conf.veth0.forwarding=1 > /dev/null
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ip netns exec ns0 sysctl net.ipv4.conf.veth1.forwarding=1 > /dev/null
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ip netns exec ns2 ping -q -c 1 10.0.1.99 > /dev/null # ping ns2->ns1
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if [ $? -ne 0 ] ; then
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echo "ERROR: canot ping ns1 from ns2"
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lret=1
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fi
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expect="packets 1 bytes 84"
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for dir in "in" "out" ; do
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cnt=$(ip netns exec ns1 nft list counter inet filter ns2${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns1 ns2$dir "$expect"
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lret=1
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fi
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cnt=$(ip netns exec ns2 nft list counter inet filter ns1${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns2 ns1$dir "$expect"
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lret=1
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fi
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done
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reset_counters
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# add masquerading rule
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ip netns exec ns0 nft -f - <<EOF
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table ip nat {
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chain postrouting {
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type nat hook postrouting priority 0; policy accept;
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meta oif veth0 masquerade
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}
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}
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EOF
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ip netns exec ns2 ping -q -c 1 10.0.1.99 > /dev/null # ping ns2->ns1
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if [ $? -ne 0 ] ; then
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echo "ERROR: cannot ping ns1 from ns2 with active ip masquerading"
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lret=1
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fi
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# ns1 should have seen packets from ns0, due to masquerade
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expect="packets 1 bytes 84"
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for dir in "in" "out" ; do
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cnt=$(ip netns exec ns1 nft list counter inet filter ns0${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns1 ns0$dir "$expect"
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lret=1
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fi
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cnt=$(ip netns exec ns2 nft list counter inet filter ns1${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns2 ns1$dir "$expect"
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lret=1
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fi
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done
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# ns1 should not have seen packets from ns2, due to masquerade
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expect="packets 0 bytes 0"
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for dir in "in" "out" ; do
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cnt=$(ip netns exec ns1 nft list counter inet filter ns2${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns1 ns0$dir "$expect"
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lret=1
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fi
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cnt=$(ip netns exec ns1 nft list counter inet filter ns2${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns2 ns1$dir "$expect"
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lret=1
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fi
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done
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ip netns exec ns0 nft flush chain ip nat postrouting
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if [ $? -ne 0 ]; then
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echo "ERROR: Could not flush nat postrouting" 1>&2
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lret=1
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fi
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test $lret -eq 0 && echo "PASS: IP masquerade for ns2"
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return $lret
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}
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test_redirect6()
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{
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local lret=0
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ip netns exec ns0 sysctl net.ipv6.conf.all.forwarding=1 > /dev/null
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ip netns exec ns2 ping -q -c 1 dead:1::99 > /dev/null # ping ns2->ns1
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if [ $? -ne 0 ] ; then
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echo "ERROR: cannnot ping ns1 from ns2 via ipv6"
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lret=1
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fi
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expect="packets 1 bytes 104"
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for dir in "in6" "out6" ; do
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cnt=$(ip netns exec ns1 nft list counter inet filter ns2${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns1 ns2$dir "$expect"
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lret=1
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fi
|
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cnt=$(ip netns exec ns2 nft list counter inet filter ns1${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns2 ns1$dir "$expect"
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lret=1
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fi
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done
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reset_counters
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# add redirect rule
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ip netns exec ns0 nft -f - <<EOF
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table ip6 nat {
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chain prerouting {
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type nat hook prerouting priority 0; policy accept;
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meta iif veth1 meta l4proto icmpv6 ip6 saddr dead:2::99 ip6 daddr dead:1::99 redirect
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}
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}
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EOF
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ip netns exec ns2 ping -q -c 1 dead:1::99 > /dev/null # ping ns2->ns1
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if [ $? -ne 0 ] ; then
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echo "ERROR: cannot ping ns1 from ns2 with active ip6 redirect"
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lret=1
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fi
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# ns1 should have seen no packets from ns2, due to redirection
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expect="packets 0 bytes 0"
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for dir in "in6" "out6" ; do
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cnt=$(ip netns exec ns1 nft list counter inet filter ns2${dir} | grep -q "$expect")
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if [ $? -ne 0 ]; then
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bad_counter ns1 ns0$dir "$expect"
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lret=1
|
fi
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done
|
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# ns0 should have seen packets from ns2, due to masquerade
|
expect="packets 1 bytes 104"
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for dir in "in6" "out6" ; do
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cnt=$(ip netns exec ns0 nft list counter inet filter ns2${dir} | grep -q "$expect")
|
if [ $? -ne 0 ]; then
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bad_counter ns1 ns0$dir "$expect"
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lret=1
|
fi
|
done
|
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ip netns exec ns0 nft delete table ip6 nat
|
if [ $? -ne 0 ]; then
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echo "ERROR: Could not delete ip6 nat table" 1>&2
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lret=1
|
fi
|
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test $lret -eq 0 && echo "PASS: IPv6 redirection for ns2"
|
|
return $lret
|
}
|
|
test_redirect()
|
{
|
local lret=0
|
|
ip netns exec ns0 sysctl net.ipv4.conf.veth0.forwarding=1 > /dev/null
|
ip netns exec ns0 sysctl net.ipv4.conf.veth1.forwarding=1 > /dev/null
|
|
ip netns exec ns2 ping -q -c 1 10.0.1.99 > /dev/null # ping ns2->ns1
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if [ $? -ne 0 ] ; then
|
echo "ERROR: cannot ping ns1 from ns2"
|
lret=1
|
fi
|
|
expect="packets 1 bytes 84"
|
for dir in "in" "out" ; do
|
cnt=$(ip netns exec ns1 nft list counter inet filter ns2${dir} | grep -q "$expect")
|
if [ $? -ne 0 ]; then
|
bad_counter ns1 ns2$dir "$expect"
|
lret=1
|
fi
|
|
cnt=$(ip netns exec ns2 nft list counter inet filter ns1${dir} | grep -q "$expect")
|
if [ $? -ne 0 ]; then
|
bad_counter ns2 ns1$dir "$expect"
|
lret=1
|
fi
|
done
|
|
reset_counters
|
|
# add redirect rule
|
ip netns exec ns0 nft -f - <<EOF
|
table ip nat {
|
chain prerouting {
|
type nat hook prerouting priority 0; policy accept;
|
meta iif veth1 ip protocol icmp ip saddr 10.0.2.99 ip daddr 10.0.1.99 redirect
|
}
|
}
|
EOF
|
ip netns exec ns2 ping -q -c 1 10.0.1.99 > /dev/null # ping ns2->ns1
|
if [ $? -ne 0 ] ; then
|
echo "ERROR: cannot ping ns1 from ns2 with active ip redirect"
|
lret=1
|
fi
|
|
# ns1 should have seen no packets from ns2, due to redirection
|
expect="packets 0 bytes 0"
|
for dir in "in" "out" ; do
|
|
cnt=$(ip netns exec ns1 nft list counter inet filter ns2${dir} | grep -q "$expect")
|
if [ $? -ne 0 ]; then
|
bad_counter ns1 ns0$dir "$expect"
|
lret=1
|
fi
|
done
|
|
# ns0 should have seen packets from ns2, due to masquerade
|
expect="packets 1 bytes 84"
|
for dir in "in" "out" ; do
|
cnt=$(ip netns exec ns0 nft list counter inet filter ns2${dir} | grep -q "$expect")
|
if [ $? -ne 0 ]; then
|
bad_counter ns1 ns0$dir "$expect"
|
lret=1
|
fi
|
done
|
|
ip netns exec ns0 nft delete table ip nat
|
if [ $? -ne 0 ]; then
|
echo "ERROR: Could not delete nat table" 1>&2
|
lret=1
|
fi
|
|
test $lret -eq 0 && echo "PASS: IP redirection for ns2"
|
|
return $lret
|
}
|
|
|
# ip netns exec ns0 ping -c 1 -q 10.0.$i.99
|
for i in 0 1 2; do
|
ip netns exec ns$i nft -f - <<EOF
|
table inet filter {
|
counter ns0in {}
|
counter ns1in {}
|
counter ns2in {}
|
|
counter ns0out {}
|
counter ns1out {}
|
counter ns2out {}
|
|
counter ns0in6 {}
|
counter ns1in6 {}
|
counter ns2in6 {}
|
|
counter ns0out6 {}
|
counter ns1out6 {}
|
counter ns2out6 {}
|
|
map nsincounter {
|
type ipv4_addr : counter
|
elements = { 10.0.1.1 : "ns0in",
|
10.0.2.1 : "ns0in",
|
10.0.1.99 : "ns1in",
|
10.0.2.99 : "ns2in" }
|
}
|
|
map nsincounter6 {
|
type ipv6_addr : counter
|
elements = { dead:1::1 : "ns0in6",
|
dead:2::1 : "ns0in6",
|
dead:1::99 : "ns1in6",
|
dead:2::99 : "ns2in6" }
|
}
|
|
map nsoutcounter {
|
type ipv4_addr : counter
|
elements = { 10.0.1.1 : "ns0out",
|
10.0.2.1 : "ns0out",
|
10.0.1.99: "ns1out",
|
10.0.2.99: "ns2out" }
|
}
|
|
map nsoutcounter6 {
|
type ipv6_addr : counter
|
elements = { dead:1::1 : "ns0out6",
|
dead:2::1 : "ns0out6",
|
dead:1::99 : "ns1out6",
|
dead:2::99 : "ns2out6" }
|
}
|
|
chain input {
|
type filter hook input priority 0; policy accept;
|
counter name ip saddr map @nsincounter
|
icmpv6 type { "echo-request", "echo-reply" } counter name ip6 saddr map @nsincounter6
|
}
|
chain output {
|
type filter hook output priority 0; policy accept;
|
counter name ip daddr map @nsoutcounter
|
icmpv6 type { "echo-request", "echo-reply" } counter name ip6 daddr map @nsoutcounter6
|
}
|
}
|
EOF
|
done
|
|
sleep 3
|
# test basic connectivity
|
for i in 1 2; do
|
ip netns exec ns0 ping -c 1 -q 10.0.$i.99 > /dev/null
|
if [ $? -ne 0 ];then
|
echo "ERROR: Could not reach other namespace(s)" 1>&2
|
ret=1
|
fi
|
|
ip netns exec ns0 ping -c 1 -q dead:$i::99 > /dev/null
|
if [ $? -ne 0 ];then
|
echo "ERROR: Could not reach other namespace(s) via ipv6" 1>&2
|
ret=1
|
fi
|
check_counters ns$i
|
if [ $? -ne 0 ]; then
|
ret=1
|
fi
|
|
check_ns0_counters ns$i
|
if [ $? -ne 0 ]; then
|
ret=1
|
fi
|
reset_counters
|
done
|
|
if [ $ret -eq 0 ];then
|
echo "PASS: netns routing/connectivity: ns0 can reach ns1 and ns2"
|
fi
|
|
reset_counters
|
test_local_dnat
|
test_local_dnat6
|
|
reset_counters
|
test_masquerade
|
test_masquerade6
|
|
reset_counters
|
test_redirect
|
test_redirect6
|
|
for i in 0 1 2; do ip netns del ns$i;done
|
|
exit $ret
|
