+void show_usage(void) {
+ printf("can-proxy options:\n"
+ "-i : intercative (send CAN packets typed by user)\n"
+ "-o file.log : log all traffic to a file\n"
+ "-p port : send CAN packets arriving at UDP port\n"
+ "-c : use select() for CAN (driver can-0.7.1-pi3.4 or newer)\n"
+ "-q : quiet\n"
+ "-h : this help\n"
+ "UDP arriving at specified port causes can-proxy to forward all CAN\n"
+ "traffic back to the sender, establishing bi-directional communication.\n");
+}