/// <summary>
/// Acquires an appropriate event envelope.
/// </summary>
/// <returns></returns>
private static MeshEvent Create(MeshEventType type)
{
// Get the appropriate packet
switch (type)
{
case MeshEventType.Error:
case MeshEventType.Ping:
case MeshEventType.PingAck:
case MeshEventType.HandshakeAck:
return(MeshEvent.Acquire());
case MeshEventType.Handshake:
return(MeshHandshake.Acquire());
case MeshEventType.GossipDigest:
case MeshEventType.GossipSince:
case MeshEventType.GossipUpdate:
return(MeshGossip.Acquire());
case MeshEventType.Subscribe:
case MeshEventType.Unsubscribe:
case MeshEventType.Custom:
return(MeshEmitterEvent.Acquire());
default:
throw new InvalidOperationException("Unknown mesh packet");
}
}
/// <summary>
/// Sends a mesh Handshake through the specified channel.
/// </summary>
/// <param name="channel">The channel to send the packet to.</param>
internal static void SendMeshHandshake(this Connection channel)
{
// Acquire and set the handhshake packet
var packet = MeshHandshake.Acquire();
packet.Key = Murmur32.GetHash(Service.Mesh.Cluster);
packet.Identity = new GossipMember(Service.Mesh.BroadcastEndpoint);
// Send the handshake packet
channel.Send(packet);
}
/// <summary>
/// Handles the command.
/// </summary>
/// <param name="channel">The channel sending the command.</param>
/// <param name="command">The command received.</param>
private static void OnHandshake(Connection channel, MeshHandshake handshake)
{
// Deserialize the handshake
var endpoint = handshake.Identity.EndPoint;
var id = endpoint.ToIdentifier();
// Set the identifier of the channel
channel.MeshIdentifier = id;
// Validate the credentials
if (!(Murmur32.GetHash(Service.Mesh.Cluster) == handshake.Key))
{
throw new UnauthorizedAccessException("Cluster access was not authorized.");
}
// Check if we're trying to connect to ourselves
if (Service.Mesh.Identifier == id)
{
// It's ourselves, remove from tracking
//var ep = channel.RemoteEndPoint as IPEndPoint;
var port = ((IPEndPoint)Service.Mesh.Binding.EndPoint).Port;
var ep = new IPEndPoint(channel.RemoteEndPoint.Address, port);
if (ep != null)
{
Service.Mesh.Members.ForgetPeer(ep);
}
channel.Close();
return;
}
// Attempt to register
MeshMember node;
if (Service.Mesh.Members.TryRegister(endpoint, channel, out node))
{
// Send ACK first
channel.SendMeshHandshakeAck();
// Send an event since we're connected to the node
Service.InvokeNodeConnect(new ClusterEventArgs(node));
}
else
{
channel.Close();
}
}
