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kselftests: extend nft_nat with inet family based nat hooks 

With older nft versions, this will cause:
[..]
PASS: ipv6 ping to ns1 was ip6 NATted to ns2
/dev/stdin:4:30-31: Error: syntax error, unexpected to, expecting newline or semicolon
                ip daddr 10.0.1.99 dnat ip to 10.0.2.99
                                           ^^
SKIP: inet nat tests
PASS: ip IP masquerade for ns2
[..]

as there is currently no way to detect if nft will be able to parse
the inet format.

redirect and masquerade tests need to be skipped in this case for inet
too because nft userspace has overzealous family check and rejects their
use in the inet family.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Florian Westphal 2019-03-27 09:22:29 +01:00 committed by Pablo Neira Ayuso
parent 63ce3940f3
commit 6978cdb129
1 changed files with 94 additions and 36 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

130
tools/testing/selftests/netfilter/nft_nat.sh
View File

@ -6,6 +6,7 @@
# Kselftest framework requirement - SKIP code is 4.
ksft_skip=4
ret=0
test_inet_nat=true
nft --version > /dev/null 2>&1
if [ $? -ne 0 ];then
@ -141,17 +142,24 @@ reset_counters()
test_local_dnat6()
{
local family=$1
local lret=0
local IPF=""
if [ $family = "inet" ];then
IPF="ip6"
fi
ip netns exec ns0 nft -f - <<EOF
table ip6 nat {
table $family nat {
chain output {
type nat hook output priority 0; policy accept;
ip6 daddr dead:1::99 dnat to dead:2::99
ip6 daddr dead:1::99 dnat $IPF to dead:2::99
}
}
EOF
if [ $? -ne 0 ]; then
echo "SKIP: Could not add add ip6 dnat hook"
echo "SKIP: Could not add add $family dnat hook"
return $ksft_skip
fi
@ -201,7 +209,7 @@ EOF
fi
done
test $lret -eq 0 && echo "PASS: ipv6 ping to ns1 was NATted to ns2"
test $lret -eq 0 && echo "PASS: ipv6 ping to ns1 was $family NATted to ns2"
ip netns exec ns0 nft flush chain ip6 nat output
return $lret
@ -209,15 +217,32 @@ EOF
test_local_dnat()
{
local family=$1
local lret=0
ip netns exec ns0 nft -f - <<EOF
table ip nat {
local IPF=""
if [ $family = "inet" ];then
IPF="ip"
fi
ip netns exec ns0 nft -f - <<EOF 2>/dev/null
table $family nat {
chain output {
type nat hook output priority 0; policy accept;
ip daddr 10.0.1.99 dnat to 10.0.2.99
ip daddr 10.0.1.99 dnat $IPF to 10.0.2.99
}
}
EOF
if [ $? -ne 0 ]; then
if [ $family = "inet" ];then
echo "SKIP: inet nat tests"
test_inet_nat=false
return $ksft_skip
fi
echo "SKIP: Could not add add $family dnat hook"
return $ksft_skip
fi
# ping netns1, expect rewrite to netns2
ip netns exec ns0 ping -q -c 1 10.0.1.99 > /dev/null
if [ $? -ne 0 ]; then
@ -264,9 +289,9 @@ EOF
fi
done
test $lret -eq 0 && echo "PASS: ping to ns1 was NATted to ns2"
test $lret -eq 0 && echo "PASS: ping to ns1 was $family NATted to ns2"
ip netns exec ns0 nft flush chain ip nat output
ip netns exec ns0 nft flush chain $family nat output
reset_counters
ip netns exec ns0 ping -q -c 1 10.0.1.99 > /dev/null
@ -313,7 +338,7 @@ EOF
fi
done
test $lret -eq 0 && echo "PASS: ping to ns1 OK after nat output chain flush"
test $lret -eq 0 && echo "PASS: ping to ns1 OK after $family nat output chain flush"
return $lret
}
@ -321,6 +346,7 @@ EOF
test_masquerade6()
{
local family=$1
local lret=0
ip netns exec ns0 sysctl net.ipv6.conf.all.forwarding=1 > /dev/null
@ -351,16 +377,21 @@ test_masquerade6()
# add masquerading rule
ip netns exec ns0 nft -f - <<EOF
table ip6 nat {
table $family nat {
chain postrouting {
type nat hook postrouting priority 0; policy accept;
meta oif veth0 masquerade
}
}
EOF
if [ $? -ne 0 ]; then
echo "SKIP: Could not add add $family masquerade hook"
return $ksft_skip
fi
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"
echo "ERROR: cannot ping ns1 from ns2 with active $family masquerading"
lret=1
fi
@ -397,19 +428,20 @@ EOF
fi
done
ip netns exec ns0 nft flush chain ip6 nat postrouting
ip netns exec ns0 nft flush chain $family nat postrouting
if [ $? -ne 0 ]; then
echo "ERROR: Could not flush ip6 nat postrouting" 1>&2
echo "ERROR: Could not flush $family nat postrouting" 1>&2
lret=1
fi
test $lret -eq 0 && echo "PASS: IPv6 masquerade for ns2"
test $lret -eq 0 && echo "PASS: $family IPv6 masquerade for ns2"
return $lret
}
test_masquerade()
{
local family=$1
local lret=0
ip netns exec ns0 sysctl net.ipv4.conf.veth0.forwarding=1 > /dev/null
@ -440,16 +472,21 @@ test_masquerade()
# add masquerading rule
ip netns exec ns0 nft -f - <<EOF
table ip nat {
table $family nat {
chain postrouting {
type nat hook postrouting priority 0; policy accept;
meta oif veth0 masquerade
}
}
EOF
if [ $? -ne 0 ]; then
echo "SKIP: Could not add add $family masquerade hook"
return $ksft_skip
fi
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"
echo "ERROR: cannot ping ns1 from ns2 with active $family masquerading"
lret=1
fi
@ -485,19 +522,20 @@ EOF
fi
done
ip netns exec ns0 nft flush chain ip nat postrouting
ip netns exec ns0 nft flush chain $family nat postrouting
if [ $? -ne 0 ]; then
echo "ERROR: Could not flush nat postrouting" 1>&2
echo "ERROR: Could not flush $family nat postrouting" 1>&2
lret=1
fi
test $lret -eq 0 && echo "PASS: IP masquerade for ns2"
test $lret -eq 0 && echo "PASS: $family IP masquerade for ns2"
return $lret
}
test_redirect6()
{
local family=$1
local lret=0
ip netns exec ns0 sysctl net.ipv6.conf.all.forwarding=1 > /dev/null
@ -527,16 +565,21 @@ test_redirect6()
# add redirect rule
ip netns exec ns0 nft -f - <<EOF
table ip6 nat {
table $family 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
if [ $? -ne 0 ]; then
echo "SKIP: Could not add add $family redirect hook"
return $ksft_skip
fi
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"
echo "ERROR: cannot ping ns1 from ns2 via ipv6 with active $family redirect"
lret=1
fi
@ -560,19 +603,20 @@ EOF
fi
done
ip netns exec ns0 nft delete table ip6 nat
ip netns exec ns0 nft delete table $family nat
if [ $? -ne 0 ]; then
echo "ERROR: Could not delete ip6 nat table" 1>&2
echo "ERROR: Could not delete $family nat table" 1>&2
lret=1
fi
test $lret -eq 0 && echo "PASS: IPv6 redirection for ns2"
test $lret -eq 0 && echo "PASS: $family IPv6 redirection for ns2"
return $lret
}
test_redirect()
{
local family=$1
local lret=0
ip netns exec ns0 sysctl net.ipv4.conf.veth0.forwarding=1 > /dev/null
@ -603,16 +647,21 @@ test_redirect()
# add redirect rule
ip netns exec ns0 nft -f - <<EOF
table ip nat {
table $family 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
if [ $? -ne 0 ]; then
echo "SKIP: Could not add add $family redirect hook"
return $ksft_skip
fi
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"
echo "ERROR: cannot ping ns1 from ns2 with active $family ip redirect"
lret=1
fi
@ -637,13 +686,13 @@ EOF
fi
done
ip netns exec ns0 nft delete table ip nat
ip netns exec ns0 nft delete table $family nat
if [ $? -ne 0 ]; then
echo "ERROR: Could not delete nat table" 1>&2
echo "ERROR: Could not delete $family nat table" 1>&2
lret=1
fi
test $lret -eq 0 && echo "PASS: IP redirection for ns2"
test $lret -eq 0 && echo "PASS: $family IP redirection for ns2"
return $lret
}
@ -746,16 +795,25 @@ if [ $ret -eq 0 ];then
fi
reset_counters
test_local_dnat
test_local_dnat6
test_local_dnat ip
test_local_dnat6 ip6
reset_counters
$test_inet_nat && test_local_dnat inet
$test_inet_nat && test_local_dnat6 inet
reset_counters
test_masquerade
test_masquerade6
test_masquerade ip
test_masquerade6 ip6
reset_counters
$test_inet_nat && test_masquerade inet
$test_inet_nat && test_masquerade6 inet
reset_counters
test_redirect
test_redirect6
test_redirect ip
test_redirect6 ip6
reset_counters
$test_inet_nat && test_redirect inet
$test_inet_nat && test_redirect6 inet
for i in 0 1 2; do ip netns del ns$i;done