OpenMetaverse.AssetManager.SendNextUploadPacket C# (CSharp) Method

        private void SendNextUploadPacket(AssetUpload upload)
        {
            SendXferPacketPacket send = new SendXferPacketPacket();

            send.XferID.ID = upload.XferID;
            send.XferID.Packet = upload.PacketNum++;

            if (send.XferID.Packet == 0)
            {
                // The first packet reserves the first four bytes of the data for the
                // total length of the asset and appends 1000 bytes of data after that
                send.DataPacket.Data = new byte[1004];
                Buffer.BlockCopy(Utils.IntToBytes(upload.Size), 0, send.DataPacket.Data, 0, 4);
                Buffer.BlockCopy(upload.AssetData, 0, send.DataPacket.Data, 4, 1000);
                upload.Transferred += 1000;

                lock (Transfers)
                {
                    Transfers.Remove(upload.AssetID);
                    Transfers[upload.ID] = upload;
                }
            }
            else if ((send.XferID.Packet + 1) * 1000 < upload.Size)
            {
                // This packet is somewhere in the middle of the transfer, or a perfectly
                // aligned packet at the end of the transfer
                send.DataPacket.Data = new byte[1000];
                Buffer.BlockCopy(upload.AssetData, upload.Transferred, send.DataPacket.Data, 0, 1000);
                upload.Transferred += 1000;
            }
            else
            {
                // Special handler for the last packet which will be less than 1000 bytes
                int lastlen = upload.Size - ((int)send.XferID.Packet * 1000);
                send.DataPacket.Data = new byte[lastlen];
                Buffer.BlockCopy(upload.AssetData, (int)send.XferID.Packet * 1000, send.DataPacket.Data, 0, lastlen);
                send.XferID.Packet |= (uint)0x80000000; // This signals the final packet
                upload.Transferred += lastlen;
            }

            Client.Network.SendPacket(send);
        }