public static bool TryParse(byte[] bytes, int offset, out TcpFramingHeader header)
{
try
{
header = new TcpFramingHeader();
header.Type = (TcpFrameType)bytes[offset + 0];
header.Length = bytes.BigendianToUInt16(offset + 2);
return(true);
}
catch
{
header = default(TcpFramingHeader);
return(false);
}
}
public static bool TryParse(byte[] bytes, int offset, out TcpFramingHeader header)
{
try
{
header = new TcpFramingHeader();
header.Type = (TcpFrameType)bytes[offset + 0];
header.Length = bytes.BigendianToUInt16(offset + 2);
return true;
}
catch
{
header = default(TcpFramingHeader);
return false;
}
}
private void GetBuffer(ServerEndPoint local, IPEndPoint remote, int length, out ServerAsyncEventArgs e, out int offset)
{
int headerLength = (local.Protocol == ServerProtocol.Tcp) ? TcpFramingHeader.TcpFramingHeaderLength : 0;
e = EventArgsManager.Get();
e.ConnectionId = ServerAsyncEventArgs.AnyConnectionId;
e.LocalEndPoint = local;
e.RemoteEndPoint = remote;
e.Count = headerLength + length;
e.AllocateBuffer();
if (headerLength > 0)
{
TcpFramingHeader.GetBytes(e.Buffer, e.Offset, TcpFrameType.ControlMessage, length);
}
offset = e.Offset + headerLength;
}
private bool TurnServer_Received(ServersManager <TurnConnection> s, TurnConnection c, ref ServerAsyncEventArgs e)
{
if (e.LocalEndPoint.Protocol == ServerProtocol.Udp)
{
if (TurnMessage.IsTurnMessage(e.Buffer, e.Offset, e.BytesTransferred))
{
TurnServer_TurnDataReceived(ref e);
}
else
{
TurnServer_PeerDataReceived(ref e);
}
}
else if (e.LocalEndPoint.Protocol == ServerProtocol.Tcp)
{
if (c.Buffer.IsValid)
{
c.Buffer.Resize(Math.Max(4096, c.BytesExpected));
if (c.Buffer.CopyTransferredFrom(e, 0) == false)
{
return(false);
}
if (c.Buffer.Count < c.BytesExpected)
{
return(true);
}
}
else
{
if (e.BytesTransferred < c.BytesExpected)
{
return(c.Buffer.CopyTransferredFrom(e, 0));
}
}
int proccessed = 0;
for (; ;)
{
if (c.Buffer.IsValid)
{
if (e == null)
{
e = EventArgsManager.Get();
e.CopyAddressesFrom(c);
}
e.AttachBuffer(c.Buffer);
proccessed = 0;
}
if (e.BytesTransferred - proccessed < c.BytesExpected)
{
return(c.Buffer.CopyTransferredFrom(e, proccessed));
}
switch (c.Phase)
{
case TcpPhase.WaitingFirstXpacket:
if (pseudoTlsMessage.IsBeginOfClientHello(e.Buffer, e.Offset, FirstXpacketLength))
{
c.Phase = TcpPhase.WaitingClientHello;
c.BytesExpected = PseudoTlsMessage.ClientHelloLength;
}
else
{
c.Phase = TcpPhase.WaitingTcpFrame;
c.BytesExpected = TcpFramingHeader.TcpFramingHeaderLength;
if (FirstXpacketLength <= TcpFramingHeader.TcpFramingHeaderLength)
{
goto case TcpPhase.WaitingTcpFrame;
}
}
break;
case TcpPhase.WaitingClientHello:
if (pseudoTlsMessage.IsClientHello(e.Buffer, e.Offset) == false)
{
return(false);
}
var x = EventArgsManager.Get();
x.CopyAddressesFrom(e);
x.Count = PseudoTlsMessage.ServerHelloHelloDoneLength;
pseudoTlsMessage.GetServerHelloHelloDoneBytes(x.Buffer, x.Offset);
s.SendAsync(x);
proccessed += c.BytesExpected;
c.Phase = TcpPhase.WaitingTcpFrame;
c.BytesExpected = TcpFramingHeader.TcpFramingHeaderLength;
break;
case TcpPhase.WaitingTcpFrame:
TcpFramingHeader tcpHeader;
if (TcpFramingHeader.TryParse(e.Buffer, e.Offset, out tcpHeader) == false)
{
return(false);
}
proccessed += c.BytesExpected;
c.Phase = (tcpHeader.Type == TcpFrameType.ControlMessage) ?
TcpPhase.WaitingTurnControlMessage : TcpPhase.WaitingTurnEndToEndData;
c.BytesExpected = tcpHeader.Length;
break;
case TcpPhase.WaitingTurnEndToEndData:
case TcpPhase.WaitingTurnControlMessage:
if (e.BytesTransferred - proccessed < c.BytesExpected)
{
if (c.Buffer.CopyTransferredFrom(e, proccessed + c.BytesExpected) == false)
{
return(false);
}
}
e.Count -= proccessed;
e.Offset += proccessed;
e.BytesTransferred = c.BytesExpected;
if (c.Phase == TcpPhase.WaitingTurnEndToEndData)
{
TurnServer_PeerDataReceived(ref e);
}
else
{
TurnServer_TurnDataReceived(ref e);
}
proccessed = e.BytesTransferred;
c.Phase = TcpPhase.WaitingTcpFrame;
c.BytesExpected = TcpFramingHeader.TcpFramingHeaderLength;
break;
default:
throw new NotImplementedException();
}
}
}
else
{
throw new NotImplementedException();
}
return(true);
}
private bool PeerServer_Received(ServersManager <PeerConnection> s, BaseConnection с, ref ServerAsyncEventArgs e)
{
//lock (syncRoot)
{
try
{
Allocation allocation = allocations.Get(e.LocalEndPoint);
if (allocation != null)
{
if (allocation.Permissions.IsPermited(e.RemoteEndPoint))
{
allocation.TouchLifetime();
if (allocation.ActiveDestination.IsEqual(e.RemoteEndPoint))
{
if (e.LocalEndPoint.Protocol == ServerProtocol.Tcp)
{
TcpFramingHeader.GetBytes(e.Buffer, e.Offset, TcpFrameType.EndToEndData, e.BytesTransferred);
e.Count = e.OffsetOffset + e.BytesTransferred;
e.OffsetOffset = 0;
}
else
{
e.Count = e.BytesTransferred;
}
e.LocalEndPoint = allocation.Local;
e.RemoteEndPoint = allocation.Reflexive;
e.ConnectionId = ServerAsyncEventArgs.AnyConnectionId;
turnServer.SendAsync(e);
e = null;
}
else
{
TurnMessage message = new TurnMessage()
{
IsAttributePaddingDisabled = true,
MessageType = MessageType.DataIndication,
TransactionId = TransactionServer.GenerateTransactionId(),
MagicCookie = new MagicCookie(),
RemoteAddress = new RemoteAddress()
{
IpAddress = e.RemoteEndPoint.Address,
Port = (UInt16)e.RemoteEndPoint.Port,
},
Data = new Data()
{
ValueRef = e.Buffer,
ValueRefOffset = e.Offset,
ValueRefLength = e.BytesTransferred,
},
};
SendTurn(message, allocation.Local, allocation.Reflexive);
}
}
}
}
catch (Exception ex)
{
logger.WriteWarning(ex.ToString());
}
}
return(true);
}
