Datagram CreateSpecialDatagram(MessageType messageType, int payloadSize)
{
var datagram = Datagram.CreateNew(peer.Configuration.MemoryStreamPool, payloadSize);
datagram.Type = messageType;
return(datagram);
}
UdpSendStatus SendFragmentedMessage(UdpRawMessage message, IChannel channel)
{
message.Position = 0;
int mtu = this.Mtu;
ushort frame = 1;
ushort frames = (ushort)Math.Ceiling(message.Length / (float)(mtu - Datagram.GetHeaderSize(true)));
ushort groupId = GetNextFragementationGroupId();
do
{
Debug.Assert(frame <= frames, "frame > frames");
Datagram datagramFrag = Datagram.CreateNew(peer.Configuration.MemoryStreamPool, mtu);
datagramFrag.Type = MessageType.UserData;
datagramFrag.Channel = channel.Descriptor.Channel;
datagramFrag.DeliveryType = channel.Descriptor.DeliveryType;
datagramFrag.FragmentationInfo = new Datagram.FragmentInfo(groupId, frame, frames);
datagramFrag.ConnectionKey = this.EndPoint.ConnectionKey;
int toCopy = mtu - Datagram.GetHeaderSize(true);
if (toCopy > message.Length - message.Position)
{
toCopy = message.Length - message.Position;
}
message.CopyTo(datagramFrag.BaseStream, toCopy);
channel.SendDatagram(datagramFrag);
frame++;
} while (message.Position < message.Length);
message.Dispose();
return(UdpSendStatus.Enqueued);
}
Datagram CreateSpecialDatagram(MessageType messageType, UdpRawMessage payload)
{
if (!CheckCanBeSendUnfragmented(payload))
{
throw new ArgumentException($"Payload can be datagram only smaller than current MTU ({Mtu})");
}
var datagram = Datagram.CreateNew(peer.Configuration.MemoryStreamPool, (int)payload.BaseStream.Length);
datagram.Type = messageType;
payload.BaseStream.Position = 0;
payload.BaseStream.CopyTo(datagram.BaseStream);
return(datagram);
}