STUN Protocol

STUN (Session Traversal Utilities for NAT) support in sgcWebSockets. Discover public IP addresses and NAT types for peer-to-peer connectivity.

Key Features

Capabilities

Discover public-facing IP address and port
Detect NAT type (full cone, restricted, symmetric)
RFC 5389 compliant implementation
UDP and TCP transport support
Essential for WebRTC and P2P connectivity

Code

Delphi Example

uses
  sgcSTUN_Client;

var
  STUN: TsgcSTUNClient;
begin
  STUN := TsgcSTUNClient.Create(nil);
  STUN.Host := 'stun.l.google.com';
  STUN.Port := 19302;
  STUN.OnSTUNBinding := HandleBinding;
  STUN.Bind;
end;