Discover is a p2p program and library that lets you register and discover sibling servers in the network based on a shared passphrase. It uses the Mainline DHT network to advertise its own existence and to look for other nodes that are running with the same passphrase.

It authenticates sibling peers using an HMAC-based mechanism.

This code is based on Wherez (https://github.com/nictuku/wherez)

Documentation can be found in GoDoc

• find the location of your company's doozerd, Chubby or DNS servers.
• robust way for stolen notebooks to "phone home".
• register and locate servers in a corporate network based on function, by using different passphrases for the DNS server, LDAP server, etc.

Example CLI usage:

$ make && ./discover 8080 "wherezexample"
peer found: 14.15.87.13:3111
peer found: 77.66.77.22:3211
peer found: 16.97.12.12:3312

8080 is your application's port to be advertised to other nodes.

The IP:port pairs that appear are those peers provided by nodes that have been contacted and authenticated.

Recently started nodes may take several minutes to find other peers and to be found by them.

Presentation: http://goo.gl/vn7Pvh