Libnice

libnice: a NAT traversal library implementing the RFC draft for Interactive Connectivity Establishement (ICE). One of the main hurdles with the NAT infrastructures used widely on the Internet today is to establish direct connection between two users. This is essential for tasks like VoIP, file transfers and collaborative applications. Libnice solves this problem by implementing the ICE methodology.

Links

• http://www.collabora.co.uk/projects/libnice/
• http://docs.huihoo.com/libnice/