Go-Utility to discover UPNP Services over SSDP. Uses: http://github.com/huin/goupnp

ssdp-discovery.go

package main

import (
	"fmt"
	"github.com/huin/goupnp"
)

func main() {
	devices, err := goupnp.DiscoverDevices("upnp:rootdevice")
	if err != nil {
		fmt.Println(err)
	}
	if len(devices) > 0 {
		for _, d := range devices {
			fmt.Printf("Discovered device %s\n", d.Root.Device.String())
			ListServices(d.Root.Device.Services)
			ListDevices(d.Root.Device.Devices)
		}
	}
}

func ListDevices(devices []goupnp.Device) {
	if len(devices) > 0 {
		for _, sd := range devices {
			fmt.Printf("Discovered Device %s\n", sd.String())
			ListDevices(sd.Devices)
			ListServices(sd.Services)
		}
	}
}

func ListServices(services []goupnp.Service) {
	if len(services) > 0 {
		for _, s := range services {
			scpd, err := s.RequestSCDP()
			fmt.Printf("  Discovered service %s\n", s.ServiceId)
			if err != nil {
				fmt.Printf("    Error requesting service SCPD: %v\n", err)
			} else {
				fmt.Println("    Available actions:")
				for _, action := range scpd.Actions {
					fmt.Printf("    * %s\n", action.Name)
					for _, arg := range action.Arguments {
						var varDesc string
						if stateVar := scpd.GetStateVariable(arg.RelatedStateVariable); stateVar != nil {
							varDesc = fmt.Sprintf(" (%s)", stateVar.DataType.Name)
						}
						fmt.Printf("      * [%s] %s%s\n", arg.Direction, arg.Name, varDesc)
					}
				}
			}
		}
	}

}