/// <summary>
/// Send message without connection
/// </summary>
/// <param name="message">Raw data</param>
/// <param name="start">data start</param>
/// <param name="length">data length</param>
/// <param name="remoteEndPoint">Packet destination</param>
/// <returns>Operation result</returns>
public bool SendUnconnectedMessage(byte[] message, int start, int length, NetEndPoint remoteEndPoint)
{
if (!IsRunning)
{
return(false);
}
var packet = NetPacketPool.GetWithData(PacketProperty.UnconnectedMessage, 0, message, start, length);
bool result = SendRawAndRecycle(packet, remoteEndPoint);
return(result);
}
/// <summary>
/// Send data to peer
/// </summary>
/// <param name="data">Data</param>
/// <param name="start">Start of data</param>
/// <param name="length">Length of data</param>
/// <param name="options">Send options (reliable, unreliable, etc.)</param>
/// <param name="channel">Set the channel wanted. See NetConstants.MultiChannelSize</param>
/// <exception cref="TooBigPacketException">
/// If size exceeds maximum limit:<para/>
/// MTU - headerSize bytes for Unreliable<para/>
/// Fragment count exceeded ushort.MaxValue<para/>
/// </exception>
public void Send(byte[] data, int start, int length, DeliveryMethod options, int channel)
{
if (_connectionState == ConnectionState.ShutdownRequested ||
_connectionState == ConnectionState.Disconnected)
{
return;
}
//Prepare
PacketProperty property = SendOptionsToProperty(options);
int headerSize = NetPacket.GetHeaderSize(property);
int mtu = _mtu;
//Check fragmentation
if (length + headerSize > mtu)
{
if (options == DeliveryMethod.Sequenced || options == DeliveryMethod.Unreliable)
{
throw new TooBigPacketException("Unreliable packet size exceeded maximum of " + (_mtu - headerSize) + " bytes");
}
int packetFullSize = mtu - headerSize;
int packetDataSize = packetFullSize - NetPacket.FragmentHeaderSize;
int fullPacketsCount = length / packetDataSize;
int lastPacketSize = length % packetDataSize;
int totalPackets = fullPacketsCount + (lastPacketSize == 0 ? 0 : 1);
NetUtils.DebugWrite("FragmentSend:\n" +
" MTU: {0}\n" +
" headerSize: {1}\n" +
" packetFullSize: {2}\n" +
" packetDataSize: {3}\n" +
" fullPacketsCount: {4}\n" +
" lastPacketSize: {5}\n" +
" totalPackets: {6}",
mtu, headerSize, packetFullSize, packetDataSize, fullPacketsCount, lastPacketSize, totalPackets);
if (totalPackets > ushort.MaxValue)
{
throw new TooBigPacketException("Data was split in " + totalPackets + " fragments, which exceeds " + ushort.MaxValue);
}
int dataOffset = 0;
lock (_sendLock)
{
for (ushort i = 0; i < fullPacketsCount; i++)
{
NetPacket p = _packetPool.Get(property, channel, packetFullSize);
p.FragmentId = _fragmentId;
p.FragmentPart = i;
p.FragmentsTotal = (ushort)totalPackets;
p.IsFragmented = true;
Buffer.BlockCopy(data, i * packetDataSize, p.RawData, dataOffset, packetDataSize);
SendPacket(p);
}
if (lastPacketSize > 0)
{
NetPacket p = _packetPool.Get(property, channel, lastPacketSize + NetPacket.FragmentHeaderSize);
p.FragmentId = _fragmentId;
p.FragmentPart = (ushort)fullPacketsCount; //last
p.FragmentsTotal = (ushort)totalPackets;
p.IsFragmented = true;
Buffer.BlockCopy(data, fullPacketsCount * packetDataSize, p.RawData, dataOffset, lastPacketSize);
SendPacket(p);
}
_fragmentId++;
}
return;
}
//Else just send
NetPacket packet = _packetPool.GetWithData(property, channel, data, start, length);
SendPacket(packet);
}