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>
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()