blob: f25f72a75cf3dbb6204bf78bea1a7cd89d348b9c [file] [log] [blame]
#!/bin/bash
#
# This test is for basic NAT functionality: snat, dnat, redirect, masquerade.
#
# Kselftest framework requirement - SKIP code is 4.
ksft_skip=4
ret=0
nft --version > /dev/null 2>&1
if [ $? -ne 0 ];then
echo "SKIP: Could not run test without nft tool"
exit $ksft_skip
fi
ip -Version > /dev/null 2>&1
if [ $? -ne 0 ];then
echo "SKIP: Could not run test without ip tool"
exit $ksft_skip
fi
ip netns add ns0
ip netns add ns1
ip netns add ns2
ip link add veth0 netns ns0 type veth peer name eth0 netns ns1 > /dev/null 2>&1
if [ $? -ne 0 ];then
echo "SKIP: No virtual ethernet pair device support in kernel"
exit $ksft_skip
fi
ip link add veth1 netns ns0 type veth peer name eth0 netns ns2
ip -net ns0 link set lo up
ip -net ns0 link set veth0 up
ip -net ns0 addr add 10.0.1.1/24 dev veth0
ip -net ns0 addr add dead:1::1/64 dev veth0
ip -net ns0 link set veth1 up
ip -net ns0 addr add 10.0.2.1/24 dev veth1
ip -net ns0 addr add dead:2::1/64 dev veth1
for i in 1 2; do
ip -net ns$i link set lo up
ip -net ns$i link set eth0 up
ip -net ns$i addr add 10.0.$i.99/24 dev eth0
ip -net ns$i route add default via 10.0.$i.1
ip -net ns$i addr add dead:$i::99/64 dev eth0
ip -net ns$i route add default via dead:$i::1
done
bad_counter()
{
local ns=$1
local counter=$2
local expect=$3
echo "ERROR: $counter counter in $ns has unexpected value (expected $expect)" 1>&2
ip netns exec $ns nft list counter inet filter $counter 1>&2
}
check_counters()
{
ns=$1
local lret=0
cnt=$(ip netns exec $ns nft list counter inet filter ns0in | grep -q "packets 1 bytes 84")
if [ $? -ne 0 ]; then
bad_counter $ns ns0in "packets 1 bytes 84"
lret=1
fi
cnt=$(ip netns exec $ns nft list counter inet filter ns0out | grep -q "packets 1 bytes 84")
if [ $? -ne 0 ]; then
bad_counter $ns ns0out "packets 1 bytes 84"
lret=1
fi
expect="packets 1 bytes 104"
cnt=$(ip netns exec $ns nft list counter inet filter ns0in6 | grep -q "$expect")
if [ $? -ne 0 ]; then
bad_counter $ns ns0in6 "$expect"
lret=1
fi
cnt=$(ip netns exec $ns nft list counter inet filter ns0out6 | grep -q "$expect")
if [ $? -ne 0 ]; then
bad_counter $ns ns0out6 "$expect"
lret=1
fi
return $lret
}
check_ns0_counters()
{
local ns=$1
local lret=0
cnt=$(ip netns exec ns0 nft list counter inet filter ns0in | grep -q "packets 0 bytes 0")
if [ $? -ne 0 ]; then
bad_counter ns0 ns0in "packets 0 bytes 0"
lret=1
fi
cnt=$(ip netns exec ns0 nft list counter inet filter ns0in6 | grep -q "packets 0 bytes 0")
if [ $? -ne 0 ]; then
bad_counter ns0 ns0in6 "packets 0 bytes 0"
lret=1
fi
cnt=$(ip netns exec ns0 nft list counter inet filter ns0out | grep -q "packets 0 bytes 0")
if [ $? -ne 0 ]; then
bad_counter ns0 ns0out "packets 0 bytes 0"
lret=1
fi
cnt=$(ip netns exec ns0 nft list counter inet filter ns0out6 | grep -q "packets 0 bytes 0")
if [ $? -ne 0 ]; then
bad_counter ns0 ns0out6 "packets 0 bytes 0"
lret=1
fi
for dir in "in" "out" ; do
expect="packets 1 bytes 84"
cnt=$(ip netns exec ns0 nft list counter inet filter ${ns}${dir} | grep -q "$expect")
if [ $? -ne 0 ]; then
bad_counter ns0 $ns$dir "$expect"
lret=1
fi
expect="packets 1 bytes 104"
cnt=$(ip netns exec ns0 nft list counter inet filter ${ns}${dir}6 | grep -q "$expect")
if [ $? -ne 0 ]; then
bad_counter ns0 $ns$dir6 "$expect"
lret=1
fi
done
return $lret
}
reset_counters()
{
for i in 0 1 2;do
ip netns exec ns$i nft reset counters inet > /dev/null
done
}
test_local_dnat6()
{
local lret=0
ip netns exec ns0 nft -f - <<EOF
table ip6 nat {
chain output {
type nat hook output priority 0; policy accept;
ip6 daddr dead:1::99 dnat to dead:2::99
}
}
EOF
if [ $? -ne 0 ]; then
echo "SKIP: Could not add add ip6 dnat hook"
return $ksft_skip
fi
# ping netns1, expect rewrite to netns2
ip netns exec ns0 ping -q -c 1 dead:1::99 > /dev/null
if [ $? -ne 0 ]; then
lret=1
echo "ERROR: ping6 failed"
return $lret
fi
expect="packets 0 bytes 0"
for dir in "in6" "out6" ; do
cnt=$(ip netns exec ns0 nft list counter inet filter ns1${dir} | grep -q "$expect")
if [ $? -ne 0 ]; then
bad_counter ns0 ns1$dir "$expect"
lret=1
fi
done
expect="packets 1 bytes 104"
for dir in "in6" "out6" ; do
cnt=$(ip netns exec ns0 nft list counter inet filter ns2${dir} | grep -q "$expect")
if [ $? -ne 0 ]; then
bad_counter ns0 ns2$dir "$expect"
lret=1
fi
done
# expect 0 count in ns1
expect="packets 0 bytes 0"
for dir in "in6" "out6" ; do
cnt=$(ip netns exec ns1 nft list counter inet filter ns0${dir} | grep -q "$expect")
if [ $? -ne 0 ]; then
bad_counter ns1 ns0$dir "$expect"
lret=1
fi
done
# expect 1 packet in ns2
expect="packets 1 bytes 104"
for dir in "in6" "out6" ; do
cnt=$(ip netns exec ns2 nft list counter inet filter ns0${dir} | grep -q "$expect")
if [ $? -ne 0 ]; then
bad_counter ns2 ns0$dir "$expect"
lret=1
fi
done
test $lret -eq 0 && echo "PASS: ipv6 ping to ns1 was NATted to ns2"
ip netns exec ns0 nft flush chain ip6 nat output
return $lret
}
test_local_dnat()
{
local lret=0
ip netns exec ns0 nft -f - <<EOF
table ip nat {
chain output {
type nat hook output priority 0; policy accept;
ip daddr 10.0.1.99 dnat to 10.0.2.99
}
}
EOF
# ping netns1, expect rewrite to netns2
ip netns exec ns0 ping -q -c 1 10.0.1.99 > /dev/null
if [ $? -ne 0 ]; then
lret=1
echo "ERROR: ping failed"
return $lret
fi
expect="packets 0 bytes 0"
for dir in "in" "out" ; do
cnt=$(ip netns exec ns0 nft list counter inet filter ns1${dir} | grep -q "$expect")
if [ $? -ne 0 ]; then
bad_counter ns0 ns1$dir "$expect"
lret=1
fi
done
expect="packets 1 bytes 84"
for dir in "in" "out" ; do
cnt=$(ip netns exec ns0 nft list counter inet filter ns2${dir} | grep -q "$expect")
if [ $? -ne 0 ]; then
bad_counter ns0 ns2$dir "$expect"
lret=1
fi
done
# expect 0 count in ns1
expect="packets 0 bytes 0"
for dir in "in" "out" ; do
cnt=$(ip netns exec ns1 nft list counter inet filter ns0${dir} | grep -q "$expect")
if [ $? -ne 0 ]; then
bad_counter ns1 ns0$dir "$expect"
lret=1
fi
done
# expect 1 packet in ns2
expect="packets 1 bytes 84"
for dir in "in" "out" ; do
cnt=$(ip netns exec ns2 nft list counter inet filter ns0${dir} | grep -q "$expect")
if [ $? -ne 0 ]; then
bad_counter ns2 ns0$dir "$expect"
lret=1
fi
done
test $lret -eq 0 && echo "PASS: ping to ns1 was NATted to ns2"
ip netns exec ns0 nft flush chain ip nat output
reset_counters
ip netns exec ns0 ping -q -c 1 10.0.1.99 > /dev/null
if [ $? -ne 0 ]; then
lret=1
echo "ERROR: ping failed"
return $lret
fi
expect="packets 1 bytes 84"
for dir in "in" "out" ; do
cnt=$(ip netns exec ns0 nft list counter inet filter ns1${dir} | grep -q "$expect")
if [ $? -ne 0 ]; then
bad_counter ns1 ns1$dir "$expect"
lret=1
fi
done
expect="packets 0 bytes 0"
for dir in "in" "out" ; do
cnt=$(ip netns exec ns0 nft list counter inet filter ns2${dir} | grep -q "$expect")
if [ $? -ne 0 ]; then
bad_counter ns0 ns2$dir "$expect"
lret=1
fi
done
# expect 1 count in ns1
expect="packets 1 bytes 84"
for dir in "in" "out" ; do
cnt=$(ip netns exec ns1 nft list counter inet filter ns0${dir} | grep -q "$expect")
if [ $? -ne 0 ]; then
bad_counter ns0 ns0$dir "$expect"
lret=1
fi
done
# expect 0 packet in ns2
expect="packets 0 bytes 0"
for dir in "in" "out" ; do
cnt=$(ip netns exec ns2 nft list counter inet filter ns0${dir} | grep -q "$expect")
if [ $? -ne 0 ]; then
bad_counter ns2 ns2$dir "$expect"
lret=1
fi
done
test $lret -eq 0 && echo "PASS: ping to ns1 OK after nat output chain flush"
return $lret
}
test_masquerade6()
{
local lret=0
ip netns exec ns0 sysctl net.ipv6.conf.all.forwarding=1 > /dev/null
ip netns exec ns2 ping -q -c 1 dead:1::99 > /dev/null # ping ns2->ns1
if [ $? -ne 0 ] ; then
echo "ERROR: cannot ping ns1 from ns2 via ipv6"
return 1
lret=1
fi
expect="packets 1 bytes 104"
for dir in "in6" "out6" ; do
cnt=$(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 masquerading rule
ip netns exec ns0 nft -f - <<EOF
table ip6 nat {
chain postrouting {
type nat hook postrouting priority 0; policy accept;
meta oif veth0 masquerade
}
}
EOF
ip netns exec ns2 ping -q -c 1 dead:1::99 > /dev/null # ping ns2->ns1
if [ $? -ne 0 ] ; then
echo "ERROR: cannot ping ns1 from ns2 with active ipv6 masquerading"
lret=1
fi
# ns1 should have seen packets from ns0, due to masquerade
expect="packets 1 bytes 104"
for dir in "in6" "out6" ; do
cnt=$(ip netns exec ns1 nft list counter inet filter ns0${dir} | grep -q "$expect")
if [ $? -ne 0 ]; then
bad_counter ns1 ns0$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 "$expect"
lret=1
fi
done
# ns1 should not have seen packets from ns2, due to masquerade
expect="packets 0 bytes 0"
for dir in "in6" "out6" ; do
cnt=$(ip netns exec ns1 nft list counter inet filter ns2${dir} | grep -q "$expect")
if [ $? -ne 0 ]; then
bad_counter ns1 ns0$dir "$expect"
lret=1
fi
cnt=$(ip netns exec ns1 nft list counter inet filter ns2${dir} | grep -q "$expect")
if [ $? -ne 0 ]; then
bad_counter ns2 ns1$dir "$expect"
lret=1
fi
done
ip netns exec ns0 nft flush chain ip6 nat postrouting
if [ $? -ne 0 ]; then
echo "ERROR: Could not flush ip6 nat postrouting" 1>&2
lret=1
fi
test $lret -eq 0 && echo "PASS: IPv6 masquerade for ns2"
return $lret
}
test_masquerade()
{
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
if [ $? -ne 0 ] ; then
echo "ERROR: canot ping ns1 from ns2"
lret=1
fi
expect="packets 1 bytes 84"
for dir in "in" "out" ; do
cnt=$(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 masquerading rule
ip netns exec ns0 nft -f - <<EOF
table ip nat {
chain postrouting {
type nat hook postrouting priority 0; policy accept;
meta oif veth0 masquerade
}
}
EOF
ip netns exec ns2 ping -q -c 1 10.0.1.99 > /dev/null # ping ns2->ns1
if [ $? -ne 0 ] ; then
echo "ERROR: cannot ping ns1 from ns2 with active ip masquerading"
lret=1
fi
# ns1 should have seen packets from ns0, due to masquerade
expect="packets 1 bytes 84"
for dir in "in" "out" ; do
cnt=$(ip netns exec ns1 nft list counter inet filter ns0${dir} | grep -q "$expect")
if [ $? -ne 0 ]; then
bad_counter ns1 ns0$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 "$expect"
lret=1
fi
done
# ns1 should not have seen packets from ns2, due to masquerade
expect="packets 0 bytes 0"
for dir in "in" "out" ; do
cnt=$(ip netns exec ns1 nft list counter inet filter ns2${dir} | grep -q "$expect")
if [ $? -ne 0 ]; then
bad_counter ns1 ns0$dir "$expect"
lret=1
fi
cnt=$(ip netns exec ns1 nft list counter inet filter ns2${dir} | grep -q "$expect")
if [ $? -ne 0 ]; then
bad_counter ns2 ns1$dir "$expect"
lret=1
fi
done
ip netns exec ns0 nft flush chain ip nat postrouting
if [ $? -ne 0 ]; then
echo "ERROR: Could not flush nat postrouting" 1>&2
lret=1
fi
test $lret -eq 0 && echo "PASS: IP masquerade for ns2"
return $lret
}
test_redirect6()
{
local lret=0
ip netns exec ns0 sysctl net.ipv6.conf.all.forwarding=1 > /dev/null
ip netns exec ns2 ping -q -c 1 dead:1::99 > /dev/null # ping ns2->ns1
if [ $? -ne 0 ] ; then
echo "ERROR: cannnot ping ns1 from ns2 via ipv6"
lret=1
fi
expect="packets 1 bytes 104"
for dir in "in6" "out6" ; do
cnt=$(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 ip6 nat {
chain prerouting {
type nat hook prerouting priority 0; policy accept;
meta iif veth1 meta l4proto icmpv6 ip6 saddr dead:2::99 ip6 daddr dead:1::99 redirect
}
}
EOF
ip netns exec ns2 ping -q -c 1 dead:1::99 > /dev/null # ping ns2->ns1
if [ $? -ne 0 ] ; then
echo "ERROR: cannot ping ns1 from ns2 with active ip6 redirect"
lret=1
fi
# ns1 should have seen no packets from ns2, due to redirection
expect="packets 0 bytes 0"
for dir in "in6" "out6" ; do
cnt=$(ip netns exec ns1 nft list counter inet filter ns2${dir} | grep -q "$expect")
if [ $? -ne 0 ]; then
bad_counter ns1 ns0$dir "$expect"
lret=1
fi
done
# ns0 should have seen packets from ns2, due to masquerade
expect="packets 1 bytes 104"
for dir in "in6" "out6" ; do
cnt=$(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 ip6 nat
if [ $? -ne 0 ]; then
echo "ERROR: Could not delete ip6 nat table" 1>&2
lret=1
fi
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
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