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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 <gnault@redhat.com> Reviewed-by: David Ahern <dsahern@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -1641,6 +1641,23 @@ ipv4_udp_novrf()
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log_start
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run_cmd nettest -D -d ${NSA_DEV} -r ${a}
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log_test_addr ${a} $? 2 "No server, device client, local conn"
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#
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# Link local connection tests (SO_DONTROUTE).
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# Connections should succeed only when the remote IP address is
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# on link (doesn't need to be routed through a gateway).
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#
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a=${NSB_IP}
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log_start
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do_run_cmd nettest -B -D -N "${NSA}" -O "${NSB}" -r ${a} --client-dontroute
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log_test_addr ${a} $? 0 "SO_DONTROUTE client"
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a=${NSB_LO_IP}
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log_start
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show_hint "Should fail 'Network is unreachable' since server is not on link"
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do_run_cmd nettest -B -D -N "${NSA}" -O "${NSB}" -r ${a} --client-dontroute
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log_test_addr ${a} $? 1 "SO_DONTROUTE client"
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}
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ipv4_udp_vrf()
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