tests: shell: add vlan mangling test case

As a follow up for:

      74cf3d16d8e9 ("tests: shell: add vlan match test case")

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

diff --git a/tests/shell/testcases/packetpath/vlan_mangling b/tests/shell/testcases/packetpath/vlan_mangling
new file mode 100755 (executable)
index 0000000..b3f87c6
--- /dev/null
+++ b/tests/shell/testcases/packetpath/vlan_mangling
@@ -0,0 +1,75 @@
+#!/bin/bash
+
+rnd=$(mktemp -u XXXXXXXX)
+ns1="nft1ifname-$rnd"
+ns2="nft2ifname-$rnd"
+
+cleanup()
+{
+       ip netns del "$ns1"
+       ip netns del "$ns2"
+}
+
+trap cleanup EXIT
+
+set -e
+
+ip netns add "$ns1"
+ip netns add "$ns2"
+ip -net "$ns1" link set lo up
+ip -net "$ns2" link set lo up
+
+ip link add veth0 netns $ns1 type veth peer name veth0 netns $ns2
+
+ip -net "$ns1" link set veth0 addr da:d3:00:01:02:03
+
+ip -net "$ns1" link add vlan123 link veth0 type vlan id 123
+ip -net "$ns2" link add vlan321 link veth0 type vlan id 321
+
+
+for dev in veth0 ; do
+       ip -net "$ns1" link set $dev up
+       ip -net "$ns2" link set $dev up
+done
+ip -net "$ns1" link set vlan123 up
+ip -net "$ns2" link set vlan321 up
+
+ip -net "$ns1" addr add 10.1.1.1/24 dev vlan123
+ip -net "$ns2" addr add 10.1.1.2/24 dev vlan321
+
+ip netns exec "$ns2" $NFT -f /dev/stdin <<"EOF"
+table netdev t {
+       chain in_update_vlan {
+               vlan type arp vlan id set 321 counter
+               ip saddr 10.1.1.1 icmp type echo-request vlan id set 321 counter
+       }
+
+       chain in {
+               type filter hook ingress device veth0 priority filter;
+               ether saddr da:d3:00:01:02:03 vlan id 123 jump in_update_vlan
+       }
+
+       chain out_update_vlan {
+               vlan type arp vlan id set 123 counter
+               ip daddr 10.1.1.1 icmp type echo-reply vlan id set 123 counter
+       }
+
+       chain out {
+               type filter hook egress device veth0 priority filter;
+               ether daddr da:d3:00:01:02:03 vlan id 321 jump out_update_vlan
+       }
+}
+EOF
+
+ip netns exec "$ns1" ping -c 1 10.1.1.2
+
+set +e
+
+ip netns exec "$ns2" $NFT list ruleset
+ip netns exec "$ns2" $NFT list table netdev t | grep 'counter packets' | grep 'counter packets 0 bytes 0'
+if [ $? -eq 1 ]
+then
+       exit 0
+fi
+
+exit 1