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A simple implementation of the UPnP protocol as a Golang library. Add port mappings for NAT devices.
Look for a gateway device, check if it supports UPnP, and if so, add port mappings.
====
mapping := new(upnp.Upnp) if err := mapping.AddPortMapping(55789, 55789, "TCP"); err == nil { fmt.Println("success !") // remove port mapping in gatway mapping.Reclaim() } else { fmt.Println("fail !") }upnpMan := new(upnp.Upnp) err := upnpMan.SearchGateway() if err != nil { fmt.Println(err.Error()) } else { fmt.Println("local ip address: ", upnpMan.LocalHost) fmt.Println("gateway ip address: ", upnpMan.Gateway.Host) }upnpMan := new(upnp.Upnp) err := upnpMan.ExternalIPAddr() if err != nil { fmt.Println(err.Error()) } else { fmt.Println("internet ip address: ", upnpMan.GatewayOutsideIP) }