DiscoverPMP attempts to scan the local network for a NAT-PMP enabled device within the given timeout.

DiscoverUPnP scans the local network for a UPnP enabled device.

ErrMultipleNAT is an error returned when multiple NATs have been detected.

PMP is a concrete implementation of the Traversal interface that uses the NAT-PMP technique.

UPnP is a concrete implementation of the Traversal interface that uses the UPnP technique.

Traversal is an interface that brings together the different NAT traversal techniques.