/// <summary>
/// Sends the specified packet using UDP broadcast to all TCNet devices.
/// </summary>
/// <param name="packet">The packet to send on the network.</param>
protected void Broadcast(Socket socket, TCNetPacket packet)
{
MemoryStream data = new MemoryStream();
TCNetBinaryWriter writer = new TCNetBinaryWriter(data);
IPEndPoint localEndpoint = (IPEndPoint)socket.LocalEndPoint;
TCNetHeader header = packet as TCNetHeader;
if (header != null)
{
header.NodeID = NodeId;
header.NodeType = Role;
header.NodeName = NodeName;
header.SequenceNumber = NextSequenceNumber();
header.Timestamp = DateTime.UtcNow.TimeOfDay;
}
packet.WriteData(writer);
try
{
socket.SendTo(data.ToArray(), new IPEndPoint(BroadcastAddress, localEndpoint.Port));
}
catch (SocketException ex)
{
var broadcastError = new TCNetSocketException(this, "TCNet socket error while broadcasting. See inner exception for more details.", ex);
broadcastError.Data["LocalPort"] = localEndpoint.Port;
broadcastError.Data["Port"] = localEndpoint.Port;
OnUnhandledException(broadcastError);
}
}
/// <summary>
/// Handles the NewPacket event of the TCNetSocket control.
/// </summary>
/// <param name="sender">The source of the event.</param>
/// <param name="e">The <see cref="NewPacketEventArgs{TCNetPacket}"/> instance containing the event data.</param>
private void TCNetSocket_NewPacket(object sender, NewPacketEventArgs <TCNetPacket> e)
{
TCNetHeader header = e.Packet as TCNetHeader;
DataTypes dataType = DataTypes.None;
if (header != null)
{
TraceEventType traceLevel = TraceEventType.Information;
switch (header.MessageType)
{
case MessageTypes.OptIn:
ProcessOptIn(e.Source, (TCNetOptIn)e.Packet);
traceLevel = TraceEventType.Verbose;
break;
case MessageTypes.OptOut:
ProcessOptOut((TCNetOptOut)e.Packet);
break;
case MessageTypes.Time:
traceLevel = TraceEventType.Verbose;
break;
case MessageTypes.Data:
{
TCNetDataHeader dataHeader = header as TCNetDataHeader;
if (dataHeader != null)
{
dataType = dataHeader.DataType;
switch (dataHeader.DataType)
{
case DataTypes.Metrics:
traceLevel = TraceEventType.Verbose;
break;
}
}
}
break;
}
tcNetTrace.TraceEvent(traceLevel, (int)header.MessageType, $"{header.NodeName}: {header.GetType().Name} {(dataType != DataTypes.None? dataType.ToString() :string.Empty)}");
}
}
/// <summary>
/// Sends the specified packet using unicast to a specific DJ Tap device.
/// </summary>
/// <param name="packet">The packet to send on the network.</param>
/// <param name="address">The address of the device to send the packet to.</param>
protected void Unicast(TCNetPacket packet, TCNetEndPoint address)
{
MemoryStream data = new MemoryStream();
TCNetBinaryWriter writer = new TCNetBinaryWriter(data);
IPEndPoint localEndpoint = (IPEndPoint)nodeSocket.LocalEndPoint;
TCNetHeader header = packet as TCNetHeader;
if (header != null)
{
header.NodeID = NodeId;
header.NodeType = Role;
header.NodeName = NodeName;
header.SequenceNumber = NextSequenceNumber();
header.Timestamp = DateTime.UtcNow.TimeOfDay;
TraceEventType traceLevel = TraceEventType.Information;
DataTypes dataType = DataTypes.None;
TCNetDataHeader dataHeader = header as TCNetDataHeader;
if (dataHeader != null)
{
dataType = dataHeader.DataType;
}
tcNetTrace.TraceEvent(traceLevel, (int)header.MessageType, $"{header.NodeName}: {header.GetType().Name} {(dataType != DataTypes.None ? dataType.ToString() : string.Empty)}");
}
packet.WriteData(writer);
try
{
unicastTXSocket.SendTo(data.ToArray(), new IPEndPoint(address.Address, address.Port));
}
catch (SocketException ex)
{
OnUnhandledException(new TCNetSocketException(this, "Socket error unicast TCNet integration.", ex));
}
}
/// <summary>
/// Tries to create a packet from the header information.
/// </summary>
/// <param name="data">The data.</param>
/// <param name="timeStamp">The time stamp.</param>
/// <param name="packet">The packet.</param>
/// <returns></returns>
internal static bool TryBuild(TCNetRecieveData data, DateTime timeStamp, out TCNetPacket packet)
{
TCNetHeader header = new TCNetHeader(MessageTypes.None);
packet = header;
try
{
//We have read all the data.
if (data.EndOfData())
{
data.Reset();
return(false);
}
//Check we have enough data to construct the header.
if (data.Length - data.ReadPosition < TCNetHeader.PacketSize)
{
return(false);
}
//Read the packet header.
header.ReadData(data.GetReader());
//Ensure the header packet is valid
if (!header.IsValid())
{
//Purge data as it is probably corrupted.
data.Reset(); //Reset position to start so we dump the data.
return(false);
}
//Read the sub packet
Func <TCNetPacket> create;
switch (header.MessageType)
{
case MessageTypes.Data:
{
TCNetDataHeader dataHeader = new TCNetDataHeader(DataTypes.None);
//Read the packet header.
dataHeader.ReadData(data.GetReader());
if (!registeredDataPackets.TryGetValue(dataHeader.DataType, out create))
{
return(false);
}
}
break;
case MessageTypes.ApplicationSpecificData:
{
TCNetApplicationSpecificData dataHeader = new TCNetApplicationSpecificData();
//Read the packet header.
dataHeader.ReadData(data.GetReader());
if (!registeredApplicationPackets.TryGetValue(dataHeader.ApplicationSignature, out create))
{
return(false);
}
}
break;
default:
if (!registeredPackets.TryGetValue(header.MessageType, out create))
{
return(false);
}
break;
}
//Create the sub packet
packet = create();
packet.RXTimeStamp = timeStamp;
packet.ReadData(data.GetReader());
}
catch (EndOfStreamException)
{
return(false);
}
return(packet != null);
}
