Commit 04708606 authored Jan 20, 2026 by Taehee Yoo Committed by Jakub Kicinski Jan 21, 2026

selftests: net: amt: wait longer for connection before sending packets



Both send_mcast4() and send_mcast6() use sleep 2 to wait for the tunnel
connection between the gateway and the relay, and for the listener
socket to be created in the LISTENER namespace.

However, tests sometimes fail because packets are sent before the
connection is fully established.

Increase the waiting time to make the tests more reliable, and use
wait_local_port_listen() to explicitly wait for the listener socket.

Fixes: c08e8bae ("selftests: add amt interface selftest script")
Signed-off-by: Taehee Yoo <ap420073@gmail.com>
Link: https://patch.msgid.link/20260120133930.863845-1-ap420073@gmail.com


Signed-off-by: Jakub Kicinski <kuba@kernel.org>

parent 82157944

tools/testing/selftests/net/amt.sh

+5 −2

Original line number	Diff line number	Diff line
		@@ -73,6 +73,8 @@
		# +------------------------+
		#==============================================================================

		source lib.sh

		readonly LISTENER=$(mktemp -u listener-XXXXXXXX)
		readonly GATEWAY=$(mktemp -u gateway-XXXXXXXX)
		readonly RELAY=$(mktemp -u relay-XXXXXXXX)
		@@ -246,14 +248,15 @@ test_ipv6_forward()

		send_mcast4()
		{
		sleep 2
		sleep 5
		wait_local_port_listen ${LISTENER} 4000 udp
		ip netns exec "${SOURCE}" bash -c \
		'printf "%s %128s" 172.17.0.2 \| nc -w 1 -u 239.0.0.1 4000' &
		}

		send_mcast6()
		{
		sleep 2
		wait_local_port_listen ${LISTENER} 6000 udp
		ip netns exec "${SOURCE}" bash -c \
		'printf "%s %128s" 2001:db8:3::2 \| nc -w 1 -u ff0e::5:6 6000' &
		}