golibnatpmp is a Go wrapper for the libnatpmp C library, thingly veiled in Go idiomatic goodness.
Before attempting to build this package, run setup.sh (caveat emptor) to download and unpack the necessary parts.
API Documentation is available from http://godoc.org/github.com/nhelke/golibnatpmp
Like the C library this code wraps, this package is BSD licensed, cf. the LICENSE file that ships with the code.