From a431327c4faacf978defa94dd0da1710d0c69801 Mon Sep 17 00:00:00 2001 From: Guillaume Nault Date: Thu, 11 May 2023 16:39:39 +0200 Subject: [PATCH] selftests: fcnal: Test SO_DONTROUTE on UDP sockets. Use nettest --client-dontroute to test the kernel behaviour with UDP sockets having the SO_DONTROUTE option. Sending packets to a neighbour (on link) host, should work. When the host is behind a router, sending should fail. Signed-off-by: Guillaume Nault Reviewed-by: David Ahern Signed-off-by: David S. Miller --- tools/testing/selftests/net/fcnal-test.sh | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/tools/testing/selftests/net/fcnal-test.sh b/tools/testing/selftests/net/fcnal-test.sh index 3a1f3051321fb..08b4b96cbd631 100755 --- a/tools/testing/selftests/net/fcnal-test.sh +++ b/tools/testing/selftests/net/fcnal-test.sh @@ -1641,6 +1641,23 @@ ipv4_udp_novrf() log_start run_cmd nettest -D -d ${NSA_DEV} -r ${a} log_test_addr ${a} $? 2 "No server, device client, local conn" + + # + # Link local connection tests (SO_DONTROUTE). + # Connections should succeed only when the remote IP address is + # on link (doesn't need to be routed through a gateway). + # + + a=${NSB_IP} + log_start + do_run_cmd nettest -B -D -N "${NSA}" -O "${NSB}" -r ${a} --client-dontroute + log_test_addr ${a} $? 0 "SO_DONTROUTE client" + + a=${NSB_LO_IP} + log_start + show_hint "Should fail 'Network is unreachable' since server is not on link" + do_run_cmd nettest -B -D -N "${NSA}" -O "${NSB}" -r ${a} --client-dontroute + log_test_addr ${a} $? 1 "SO_DONTROUTE client" } ipv4_udp_vrf() -- 2.30.2