+# ----- Semi-slave mode -----
+$ insmod ./sllin.ko master=0
+
+$ sudo slcan_attach -w /dev/ttyS0
+attached tty /dev/ttyS0 to netdevice sllin0
+Press any key to detach /dev/ttyS0 ...
+
+# run in another terminal
+$ sudo ip link set sllin0 up
+
+$ candump -t d sllin0
+ (000.000000) sllin0 2 [0] remote request
+ (001.003734) sllin0 1 [0] remote request
+ (000.000017) sllin0 1 [2] 08 80
+ (000.996027) sllin0 2 [0] remote request
+ (001.003958) sllin0 1 [0] remote request
+ (000.000017) sllin0 1 [2] 08 80
+ (000.996049) sllin0 2 [0] remote request
+ (001.003930) sllin0 1 [0] remote request
+ (000.000016) sllin0 1 [2] 08 80
+ (000.996053) sllin0 2 [0] remote request
+ (001.003945) sllin0 1 [0] remote request
+ (000.000017) sllin0 1 [2] 08 80
+
+# There is one LIN header without response on the bus (= only RTR can frame)
+# and another LIN header followed by a response (= RTR + non-RTR CAN frame
+# with the same ID)
+