Commit 4656d72c authored by Matthieu Baerts's avatar Matthieu Baerts Committed by Jakub Kicinski
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selftests: mptcp: userspace: validate v4-v6 subflows mix 



MPTCP protocol supports having subflows in both IPv4 and IPv6. In Linux,
it is possible to have that if the MPTCP socket has been created with
AF_INET6 family without the IPV6_V6ONLY option.

Here, a new IPv4 subflow is being added to the initial IPv6 connection,
then being removed using Netlink commands.

Cc: stable@vger.kernel.org # v5.19+
Reviewed-by: default avatarMat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: default avatarMatthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent fb00ee4f

tools/testing/selftests/net/mptcp/userspace_pm.sh

+47 −0
Original line number Diff line number Diff line
@@ -752,6 +752,52 @@ test_subflows() 
	   "$server4_token" > /dev/null 2>&1

}



test_subflows_v4_v6_mix()

{

	# Attempt to add a listener at 10.0.2.1:<subflow-port>

	ip netns exec "$ns1" ./pm_nl_ctl listen 10.0.2.1\

	   $app6_port > /dev/null 2>&1 &

	local listener_pid=$!



	# ADD_ADDR4 from server to client machine reusing the subflow port on

	# the established v6 connection

	:>"$client_evts"

	ip netns exec "$ns1" ./pm_nl_ctl ann 10.0.2.1 token "$server6_token" id\

	   $server_addr_id dev ns1eth2 > /dev/null 2>&1

	stdbuf -o0 -e0 printf "ADD_ADDR4 id:%d 10.0.2.1 (ns1) => ns2, reuse port\t\t" $server_addr_id

	sleep 0.5

	verify_announce_event "$client_evts" "$ANNOUNCED" "$client6_token" "10.0.2.1"\

			      "$server_addr_id" "$app6_port"



	# CREATE_SUBFLOW from client to server machine

	:>"$client_evts"

	ip netns exec "$ns2" ./pm_nl_ctl csf lip 10.0.2.2 lid 23 rip 10.0.2.1 rport\

	   $app6_port token "$client6_token" > /dev/null 2>&1

	sleep 0.5

	verify_subflow_events "$client_evts" "$SUB_ESTABLISHED" "$client6_token"\

			      "$AF_INET" "10.0.2.2" "10.0.2.1" "$app6_port" "23"\

			      "$server_addr_id" "ns2" "ns1"



	# Delete the listener from the server ns, if one was created

	kill_wait $listener_pid



	sport=$(sed --unbuffered -n 's/.*\(sport:\)\([[:digit:]]*\).*$/\2/p;q' "$client_evts")



	# DESTROY_SUBFLOW from client to server machine

	:>"$client_evts"

	ip netns exec "$ns2" ./pm_nl_ctl dsf lip 10.0.2.2 lport "$sport" rip 10.0.2.1 rport\

	   $app6_port token "$client6_token" > /dev/null 2>&1

	sleep 0.5

	verify_subflow_events "$client_evts" "$SUB_CLOSED" "$client6_token" \

			      "$AF_INET" "10.0.2.2" "10.0.2.1" "$app6_port" "23"\

			      "$server_addr_id" "ns2" "ns1"



	# RM_ADDR from server to client machine

	ip netns exec "$ns1" ./pm_nl_ctl rem id $server_addr_id token\

	   "$server6_token" > /dev/null 2>&1

	sleep 0.5

}



test_prio()

{

	local count
@@ -861,6 +907,7 @@ make_connection "v6" 
test_announce

test_remove

test_subflows

test_subflows_v4_v6_mix

test_prio

test_listener