in lib/handler.go [123:134]
func handleHostOverride(config *Config, host string) (*DHCPServer, error) {
addr := net.ParseIP(host)
if addr == nil {
return nil, fmt.Errorf("Failed to get IP for overridden host %s", host)
}
port := 67
if config.Version == 6 {
port = 547
}
server := NewDHCPServer(host, addr, port)
return server, nil
}