/// <summary>
/// Sends a netgram
/// </summary>
/// <param name="netgram">The netgram to send</param>
public void SendNetgram(OutboundNetgram netgram)
{
lock (_lock)
{
if (netgram.PortId == 255)
{
// send to all ports
foreach (var port in _ports)
{
port.SendNetgram(netgram);
}
}
else
{
var port = _getPort(netgram.PortId);
if (port != null)
{
port.SendNetgram(netgram);
}
}
}
}
/// <summary>
/// Sends a netgram out of this port
/// </summary>
/// <param name="netgram">The netgram to send</param>
public void SendNetgram(OutboundNetgram netgram)
{
IPEndPoint ep = null;
byte[] buffer = new byte[1500];
int offset = 0;
BvlcHeader header = new BvlcHeader();
IBvlcMessage message = null;
if (netgram.Destination.IsBroadcast())
{
ep = IPUtils.MacToIPEndPoint(_bbmdMac);
header.Function = FunctionCode.OriginalUnicastNpdu;
//header.Function = FunctionCode.OriginalBroadcastNpdu;
header.Length = 0;
message = new OriginalBroadcastNpduMessage();
}
else
{
ep = IPUtils.MacToIPEndPoint(netgram.Destination);
header.Function = FunctionCode.OriginalUnicastNpdu;
header.Length = 0;
message = new OriginalUnicastNpduMessage();
}
offset = header.Serialize(buffer, offset);
offset = message.Serialize(buffer, offset);
offset = netgram.Content.Serialize(buffer, offset);
// patch the length
buffer[2] = (byte)(offset << 8);
buffer[3] = (byte)(offset);
lock(this._lock)
{
if (_server != null)
{
_server.Send(ep, buffer, offset);
}
}
}
/// <summary>
/// Sends a netgram out of this port
/// </summary>
/// <param name="netgram">The netgram to send</param>
public void SendNetgram(OutboundNetgram netgram)
{
Contract.Requires(_deviceMac.Length == 6);
Contract.Requires(netgram.Destination.IsBroadcast() || netgram.Destination.Length == 6);
byte[] buffer = new byte[1500];
int lengthOffset = 0;
int offset = 0;
int length;
var destination = netgram.Destination.IsBroadcast() ? _ethernetBroadcastMac : netgram.Destination;
// write the destination mac address bytes
for(int i = 0; i < 6; i++)
{
buffer[offset++] = destination[i];
}
// write the source mac address bytes
for(int i = 0; i < 6; i++)
{
buffer[offset++] = _deviceMac[i];
}
// the next 2 bytes are used for the packet length, so
// we skip them until we know what they are
lengthOffset = offset;
offset += 2;
// DSAP and SSAP
buffer[offset++] = 0x82;
buffer[offset++] = 0x82;
// LLC control
buffer[offset++] = 0x03;
// serialize the netgram content
offset = netgram.Content.Serialize(buffer, offset);
// now that we have the full packet length, we backfill
// the length field
length = offset - lengthOffset - 2;
buffer.WriteUInt16(lengthOffset, (ushort)length);
lock(_device)
{
_device.SendPacket(buffer, offset);
}
}
/// <summary>
/// Sends a netgram
/// </summary>
/// <param name="netgram">The netgram to send</param>
public void SendNetgram(OutboundNetgram netgram)
{
lock(_lock)
{
if (netgram.PortId == 255)
{
// send to all ports
foreach (var port in _ports)
{
port.SendNetgram(netgram);
}
}
else
{
var port = _getPort(netgram.PortId);
if (port != null)
{
port.SendNetgram(netgram);
}
}
}
}
