codecat/enet-p2p

Example for ENet on how to connect 2 peers to each other that are both behind a NAT using NAT hole punching.

ENet P2P example

This is an example for ENet that lets you connect 2 peers to each other that are both behind a NAT, using NAT hole punching and an intermediate server.

The source

The source is merely an example, so I don't provide any means to build it. Although it should build and run okay, given you change ServerHostName in the client file to point to your own server.

• Server code: p2ptest_server.cpp
• Client code: p2ptest_client.cpp

How it works

1. The server needs to be running on some publicly available (non-NAT) server.
2. Each client connects to the server via enet_host_connect.
3. Server sends full peer addresses of all connected peers to all other peers.
4. Each peer connects directly using enet_host_connect to the same address reported by the server.
5. Once 2 peers both connect to each other, the connection will be established and you may start sending packets!