func mapPort(addr string, port int) error {
internalIP, internalPortString, err := net.SplitHostPort(addr)
if err != nil {
return fmt.Errorf("Unable to split host and port for %v: %v", addr, err)
}
internalPort, err := strconv.Atoi(internalPortString)
if err != nil {
return fmt.Errorf("Unable to parse local port: ")
}
if internalIP == "" {
internalIP, err = determineInternalIP()
if err != nil {
return fmt.Errorf("Unable to determine internal IP: %s", err)
}
}
igd, err := igdman.NewIGD()
if err != nil {
return fmt.Errorf("Unable to get IGD: %s", err)
}
igd.RemovePortMapping(igdman.TCP, port)
err = igd.AddPortMapping(igdman.TCP, internalIP, internalPort, port, 0)
if err != nil {
return fmt.Errorf("Unable to map port with igdman %d: %s", port, err)
}
return nil
}
func unmapPort(port int) error {
igd, err := igdman.NewIGD()
if err != nil {
return fmt.Errorf("Unable to get IGD: %s", err)
}
if err := igd.RemovePortMapping(igdman.TCP, port); err != nil {
return fmt.Errorf("Unable to unmap port with igdman %d: %s", port, err)
}
return nil
}