Imports github.com/jackpal/go-nat-pmp github.com/koron/go-ssdp github.com/huin/goupnp/dcps/internetgateway1 github.com/huin/goupnp/dcps/internetgateway2 github.com/huin/goupnp github.com/jackpal/gateway Standard library imports context errors math math/rand net net/url strings time