From ec0d0fcbd5d8645fdfb75717d70270f59254d04d Mon Sep 17 00:00:00 2001 From: Paolo Abeni Date: Fri, 18 Oct 2024 17:57:38 +0200 Subject: [PATCH] selftests: mptcp: join: test for prohibited MPC to port-based endp commit 5afca7e996c42aed1b4a42d4712817601ba42aff upstream. Explicitly verify that MPC connection attempts towards a port-based signal endpoint fail with a reset. Note that this new test is a bit different from the other ones, not using 'run_tests'. It is then needed to add the capture capability, and the picking the right port which have been extracted into three new helpers. The info about the capture can also be printed from a single point, which simplifies the exit paths in do_transfer(). The 'Fixes' tag here below is the same as the one from the previous commit: this patch here is not fixing anything wrong in the selftests, but it validates the previous fix for an issue introduced by this commit ID. Fixes: 1729cf186d8a ("mptcp: create the listening socket for new port") Cc: stable@vger.kernel.org Co-developed-by: Matthieu Baerts (NGI0) Signed-off-by: Matthieu Baerts (NGI0) Signed-off-by: Paolo Abeni Reviewed-by: Mat Martineau Signed-off-by: Matthieu Baerts (NGI0) Link: https://patch.msgid.link/20241014-net-mptcp-mpc-port-endp-v2-2-7faea8e6b6ae@kernel.org Signed-off-by: Jakub Kicinski [ Conflicts in mptcp_join.sh, because commit 0bd962dd86b2 ("selftests: mptcp: join: check CURRESTAB counters"), and commit 9e6a39ecb9a1 ("selftests: mptcp: export TEST_COUNTER variable") are linked to new features, not available in this version. Resolving the conflicts is easy, simply adding the new helpers before do_transfer(), and rename MPTCP_LIB_TEST_COUNTER to TEST_COUNT that was used before. ] Signed-off-by: Matthieu Baerts (NGI0) Signed-off-by: Greg Kroah-Hartman --- .../testing/selftests/net/mptcp/mptcp_join.sh | 117 +++++++++++++----- 1 file changed, 86 insertions(+), 31 deletions(-) diff --git a/tools/testing/selftests/net/mptcp/mptcp_join.sh b/tools/testing/selftests/net/mptcp/mptcp_join.sh index a21376b0f61d..17ace5627ce3 100755 --- a/tools/testing/selftests/net/mptcp/mptcp_join.sh +++ b/tools/testing/selftests/net/mptcp/mptcp_join.sh @@ -23,6 +23,7 @@ tmpfile="" cout="" err="" capout="" +cappid="" ns1="" ns2="" ksft_skip=4 @@ -1006,6 +1007,44 @@ pm_nl_set_endpoint() fi } +cond_start_capture() +{ + local ns="$1" + + :> "$capout" + + if $capture; then + local capuser capfile + if [ -z $SUDO_USER ]; then + capuser="" + else + capuser="-Z $SUDO_USER" + fi + + capfile=$(printf "mp_join-%02u-%s.pcap" "$TEST_COUNT" "$ns") + + echo "Capturing traffic for test $TEST_COUNT into $capfile" + ip netns exec "$ns" tcpdump -i any -s 65535 -B 32768 $capuser -w "$capfile" > "$capout" 2>&1 & + cappid=$! + + sleep 1 + fi +} + +cond_stop_capture() +{ + if $capture; then + sleep 1 + kill $cappid + cat "$capout" + fi +} + +get_port() +{ + echo "$((10000 + TEST_COUNT - 1))" +} + do_transfer() { local listener_ns="$1" @@ -1013,33 +1052,17 @@ do_transfer() local cl_proto="$3" local srv_proto="$4" local connect_addr="$5" + local port - local port=$((10000 + TEST_COUNT - 1)) - local cappid local FAILING_LINKS=${FAILING_LINKS:-""} local fastclose=${fastclose:-""} local speed=${speed:-"fast"} + port=$(get_port) :> "$cout" :> "$sout" - :> "$capout" - if $capture; then - local capuser - if [ -z $SUDO_USER ] ; then - capuser="" - else - capuser="-Z $SUDO_USER" - fi - - capfile=$(printf "mp_join-%02u-%s.pcap" "$TEST_COUNT" "${listener_ns}") - - echo "Capturing traffic for test $TEST_COUNT into $capfile" - ip netns exec ${listener_ns} tcpdump -i any -s 65535 -B 32768 $capuser -w $capfile > "$capout" 2>&1 & - cappid=$! - - sleep 1 - fi + cond_start_capture ${listener_ns} NSTAT_HISTORY=/tmp/${listener_ns}.nstat ip netns exec ${listener_ns} \ nstat -n @@ -1125,10 +1148,7 @@ do_transfer() wait $spid local rets=$? - if $capture; then - sleep 1 - kill $cappid - fi + cond_stop_capture NSTAT_HISTORY=/tmp/${listener_ns}.nstat ip netns exec ${listener_ns} \ nstat | grep Tcp > /tmp/${listener_ns}.out @@ -1144,7 +1164,6 @@ do_transfer() ip netns exec ${connector_ns} ss -Menita 1>&2 -o "dport = :$port" cat /tmp/${connector_ns}.out - cat "$capout" return 1 fi @@ -1161,13 +1180,7 @@ do_transfer() fi rets=$? - if [ $retc -eq 0 ] && [ $rets -eq 0 ];then - cat "$capout" - return 0 - fi - - cat "$capout" - return 1 + [ $retc -eq 0 ] && [ $rets -eq 0 ] } make_file() @@ -2944,6 +2957,32 @@ verify_listener_events() fail_test "$e_type:$type $e_family:$family $e_saddr:$saddr $e_sport:$sport" } +chk_mpc_endp_attempt() +{ + local retl=$1 + local attempts=$2 + + print_check "Connect" + + if [ ${retl} = 124 ]; then + fail_test "timeout on connect" + elif [ ${retl} = 0 ]; then + fail_test "unexpected successful connect" + else + print_ok + + print_check "Attempts" + count=$(mptcp_lib_get_counter ${ns1} "MPTcpExtMPCapableEndpAttempt") + if [ -z "$count" ]; then + print_skip + elif [ "$count" != "$attempts" ]; then + fail_test "got ${count} MPC attempt[s] on port-based endpoint, expected ${attempts}" + else + print_ok + fi + fi +} + add_addr_ports_tests() { # signal address with port @@ -3034,6 +3073,22 @@ add_addr_ports_tests() chk_join_nr 2 2 2 chk_add_nr 2 2 2 fi + + if reset "port-based signal endpoint must not accept mpc"; then + local port retl count + port=$(get_port) + + cond_start_capture ${ns1} + pm_nl_add_endpoint ${ns1} 10.0.2.1 flags signal port ${port} + mptcp_lib_wait_local_port_listen ${ns1} ${port} + + timeout 1 ip netns exec ${ns2} \ + ./mptcp_connect -t ${timeout_poll} -p $port -s MPTCP 10.0.2.1 >/dev/null 2>&1 + retl=$? + cond_stop_capture + + chk_mpc_endp_attempt ${retl} 1 + fi } syncookies_tests()