ReceiveEvent HandleNetworkEvent()
{
ReceiveEvent e;
using( BitReader reader = GetPooledReader() )
{
DataStream stream = reader.GetStream();
int connectionId;
ChannelIndex channel;
e = PollReceive( stream, out connectionId, out channel );
if( e == ReceiveEvent.Error || e == ReceiveEvent.NoMoreEvents ) { return e; }
// on the server, the connectionId is one to one with the client index
NodeIndex client = new NodeIndex( (uint)connectionId );
switch( e )
{
case ReceiveEvent.Connect:
//_profiler.RecordEvent(TickType.Receive, (uint)receivedSize, MessageManager.reverseChannels[channelId], "TRANSPORT_CONNECT");
Log.Info( $"Client {client.GetClientIndex()} sent initial connection packet" );
ClientConnection c;
if( _commonSettings.enableEncryption )
{
// This client is required to complete the crypto-hail exchange.
EllipticDiffieHellman keyExchange = SendCryptoHail();
c = new ClientConnection( client, ClientConnection.Status.PendingConnectionChallengeResponse, keyExchange );
}
else
{
c = new ClientConnection( client, ClientConnection.Status.PendingConnectionRequest, null );
}
_connection.Add( c.GetIndex(), c );
// TODO: cozeroff NO, NO, NO, check for timeouts of clients manually
//StartCoroutine(ApprovalTimeout(clientId));
break;
case ReceiveEvent.Message:
HandleMessage( reader, client, channel );
break;
case ReceiveEvent.Disconnect:
//_profiler.RecordEvent(TickType.Receive, 0, "NONE", "TRANSPORT_DISCONNECT");
Log.Info( "Disconnect Event From " + client.GetClientIndex() );
// TODO: cozeroff
//OnClientDisconnectServer( client );
if( _onClientDisconnect != null )
{
_onClientDisconnect.Invoke( client );
}
break;
}
}
return e;
}
bool Send( NodeIndex client, InternalMessage message, ChannelIndex channel, BitWriter writer, bool sendImmediately, out string error )
{
int clientIndex = client.GetClientIndex();
byte[] key = _connection.GetAt(clientIndex-1).GetSharedSecretKey();
// for the server, connectionId == clientIndex
return base.Send( clientIndex, key, message, channel, writer, sendImmediately, out error );
}
void HandleMessage( BitReader reader, NodeIndex client, ChannelIndex channel )
{
InternalMessage messageType = UnwrapMessage( reader, client );
if( messageType == InternalMessage.INVALID ) { return; }
//_profiler.StartEvent(TickType.Receive, size, channelId, messageType);
Log.Info( $"Handling message {AlpacaConstant.GetName(messageType)} from client {client.GetClientIndex()}" );
ClientConnection connection = _connection.GetAt( client.GetClientIndex() - 1 );
ClientConnection.Status state = connection.GetState();
if( (state == ClientConnection.Status.PendingConnectionChallengeResponse) && (messageType != InternalMessage.ConnectionResponse ) )
{
Log.Error( $"Client {client.GetClientIndex()} is pending connection response, but client sent message {AlpacaConstant.GetName(messageType)} instead." );
return;
}
if( (state == ClientConnection.Status.PendingConnectionRequest) && (messageType != InternalMessage.ConnectionRequest) )
{
Log.Error( $"Client {client.GetClientIndex()} is pending connection request, but client sent message {AlpacaConstant.GetName(messageType)} instead." );
return;
}
switch( messageType )
{
case InternalMessage.ConnectionRequest:
OnMessageConnectionRequest( client, reader );
break;
case InternalMessage.ConnectionResponse:
// TODO: cozeroff crypto implementation
Log.Error( "Crypto not implemented yet!" );
break;
case InternalMessage.CustomServer:
OnMessageCustomServer( client, reader );
break;
default:
Log.Error( $"Read unrecognized messageType{AlpacaConstant.GetName(messageType)}" );
break;
}
//_profiler.EndEvent();
}
void OnMessageCustomServer( NodeIndex clientNode, BitReader reader )
{
if( _onMessageCustomServer != null )
{
_onMessageCustomServer.Invoke( clientNode, reader );
}
else
{
Log.Error( $"Received custom message from client {clientNode.GetClientIndex()} but no custom handler is set" );
}
}
void OnMessageConnectionRequest( NodeIndex clientNode, BitReader reader )
{
// update ClientConnection state
int clientIndex = clientNode.GetClientIndex();
ClientConnection connection = _connection.GetAt( clientIndex - 1 );
connection.SetConnected();
// send the new client the data it needs, plus spawn instructions for all current entities
using( BitWriter writer = GetPooledWriter() )
{
writer.Packed<Int32>( clientIndex );
writer.Packed<float>( _networkTime );
writer.Packed<Int32>( NetworkTransport.GetNetworkTimestamp() );
int entityCount = _entity.GetCount();
writer.Packed<Int32>( entityCount );
Entity e;
for( int i = 0; i < entityCount; ++i )
{
e = _entity.GetAt(i);
e.MakeSpawn().Write( writer );
}
string error;
if( !SendInternal( clientNode, InternalMessage.ConnectionApproved, InternalChannel.Reliable, writer, true, out error ) )
{
Log.Error( $"OnMessageConnectionRequest failed to send connection approval data to new client {clientIndex}.\n{error}" );
}
}
// Inform old clients of the new client
using( BitWriter writer = GetPooledWriter() )
{
writer.Packed<Int32>( clientIndex );
for( int i = 0; i < _connection.GetCount(); ++i )
{
if( i == (clientIndex - 1) ) { continue; } // skip the new client
ClientConnection sibling = _connection.GetAt(i);
string error;
if( !SendInternal( sibling.GetId(), InternalMessage.SiblingConnected, InternalChannel.Reliable, writer, false, out error ) )
{
Log.Error( $"OnMessageConnectionRequest failed to send SiblingConnected message to all other clients.\n{error}" );
}
}
}
// callback
//if( _onClientConnect != null ) { _onClientConnect.Invoke( clientNode ); }
}
public Entity SpawnEntityServer( NodeIndex owner, EntityPrefabIndex prefabIndex, Vector3 position, Quaternion rotation, out string error )
{
if( owner != NodeIndex.SERVER_NODE_INDEX )
{
ClientConnection client = _connection.Get( owner );
if( client == null )
{
error = $"Cannot spawn entity with ownerClientId {owner.GetClientIndex()}, client not yet connected!";
return null;
}
}
// Generate unique network id
uint unique_id = _entityCounter;
++_entityCounter;
EntityIndex entityIndex = new EntityIndex( unique_id );
// spawn
Entity.Data data = new Entity.Data() { id = entityIndex, owner = owner, prefabIndex = prefabIndex };
Entity.Spawn spawn = new Entity.Spawn( data, position, rotation );
Entity entity = Entity.SpawnEntity( _commonSettings.entityPrefab, spawn, _localIndex );
_entity.Add( entityIndex, entity );
// notify all clients that an entity was created
for( int i = 0; i < _connection.GetCount(); ++i )
{
string clientSendError;
ClientConnection client = _connection.GetAt(i);
using( BitWriter writer = GetPooledWriter() )
{
spawn.Write( writer );
if( !SendInternal( client.GetId(), InternalMessage.EntityCreate, InternalChannel.Reliable, writer, false, out clientSendError ) )
{
error = $"Failed to send spawn to client {i}, error is:\n{clientSendError}\n";
return null;
}
}
}
if( _onEntitySpawn != null ) { _onEntitySpawn.Invoke( entity ); }
error = null;
return entity;
}
