// GetExternalIPAddress ...
func GetExternalIPAddress() {
start := time.Now()
clients, _, totalErr := internetgateway1.NewWANIPConnection1Clients()
if totalErr != nil {
log.Printf("Total error retrieving IP clients")
return
}
for _, client := range clients {
if addr, err := client.GetExternalIPAddress(); err != nil {
log.Printf("err getting address: %v", err)
} else {
log.Printf("IP address: %v", addr)
}
}
// extIPClients := make([]GetExternalIPAddresser, len(clients))
// for i, client := range clients {
// if addr, err := client.GetExternalIPAddress(); err != nil {
// log.Printf("err getting address: %v", err)
// } else {
// log.Printf("IP address: %v", addr)
// }
// extIPClients[i] = client
// }
// DisplayExternalIPResults(extIPClients, errors, err)
log.Printf("took %v seconds", time.Since(start))
}
// Use discovered WANIPConnection services to find external IP addresses.
func Example_WANIPConnection_GetExternalIPAddress() {
clients, errors, err := internetgateway1.NewWANIPConnection1Clients()
extIPClients := make([]GetExternalIPAddresser, len(clients))
for i, client := range clients {
extIPClients[i] = client
}
DisplayExternalIPResults(extIPClients, errors, err)
// Output:
}
// Discover scans the local network for routers and returns the first
// UPnP-enabled router it encounters. It will try up to 3 times to find a
// router, sleeping a random duration between each attempt. This is to
// mitigate a race condition with many callers attempting to discover
// simultaneously.
//
// TODO: if more than one client is found, only return those on the same
// subnet as the user?
func Discover() (*IGD, error) {
maxTries := 3
sleepMs, _ := crypto.RandIntn(5000)
for try := 0; try < maxTries; try++ {
time.Sleep(time.Millisecond * time.Duration(sleepMs))
pppclients, _, _ := internetgateway1.NewWANPPPConnection1Clients()
if len(pppclients) > 0 {
return &IGD{pppclients[0]}, nil
}
ipclients, _, _ := internetgateway1.NewWANIPConnection1Clients()
if len(ipclients) > 0 {
return &IGD{ipclients[0]}, nil
}
sleepMs *= 2
}
return nil, errors.New("no UPnP-enabled gateway found")
}