smoke: add ipv6 ping tests.

Add some ipv6 pings issued from grcli.

Signed-off-by: Olivier Gournet <[email protected]>

smoke/ip6_builtin_icmp_test.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+# SPDX-License-Identifier: BSD-3-Clause
+# Copyright (c) 2025 Olivier Gournet
+
+. $(dirname $0)/_init.sh
+
+p0=${run_id}0
+p1=${run_id}1
+
+grcli add interface port $p0 devargs net_tap0,iface=$p0 mac f0:0d:ac:dc:13:00
+grcli add interface port $p1 devargs net_tap1,iface=$p1 mac f0:0d:ac:dc:13:01
+grcli add ip6 address fd00:ba4:0::1/64 iface $p0
+grcli add ip6 address fd00:ba4:1::1/64 iface $p1
+
+for n in 0 1; do
+	p=$run_id$n
+	ip netns add $p
+	echo ip netns del $p >> $tmp/cleanup
+	ip link set $p netns $p
+	ip -n $p link set $p address ba:d0:ca:cd:00:0$n
+	ip -n $p link set $p up
+	ip -n $p addr add fd00:ba4:$n::2/64 dev $p
+	ip -n $p route add fd00:ba4::/62 via fd00:ba4:$n::1 dev $p
+	ip -n $p addr show
+done
+
+sleep 3  # wait for DAD
+
+grcli ping fd00:ba4:0::2 count 10 delay 100
+grcli ping fd00:ba4:1::2 count 3 delay 10
+
+# Expect this test to fail
+grcli ping fd00:baa::1 count 1 && fail "ping to unknown route succeeded"
+grcli ping fd00:ba4:1::3 count 1 && fail "ping to non-existent host succeeded"
+
+grcli traceroute fd00:ba4:1::2