Server Send Packet

    public SocketError SendPacket(uint clid, DataPacket p, DProcessRequestResultsServer handler = null)
        {
            if (clid < Clients.Count || Clients[(int)clid] == null )
            {
                Log.Post(LogMessageType.Error, "Cannot send packet to client[{0}] - client id is invalid!", clid);
                return SocketError.SocketError;
            }
            if (Protocol == null)
            {
                Log.Post(LogMessageType.CriticalError, "Cannot send packet to client[{0}] - no protocol specified!", clid);
                return SocketError.SocketError;
            }
            if (p.DataLength > Protocol.MaxPacketLength)
            {
                Log.Post(LogMessageType.CriticalError,
                    "Cannot send packet to client[{0}] - packet is too big ({1} vs {2} bytes allowed by protocol)",
                    clid, p.DataLength, Protocol.MaxPacketLength);
                return SocketError.SocketError;
            }

            var client = Clients[(int) clid];
            if (!client.ShouldBeActive || !client.IsActive || client.Socket == null)
            {
                Log.Post(LogMessageType.Error,
                    "Failed to send packet to client[{0}] - client is now disconnecting",
                    clid);
                client.ShouldBeActive = false;
                return SocketError.SocketError;
            }

            if (!RegisterAnswerHandler(p.Key, handler))
                return SocketError.SocketError;

            SocketError err;
            client.Socket.Send(p.GetBytes(), 0, DataPacket.HeaderLength, SocketFlags.None, out err);
            if (err != SocketError.Success)
            {
                Log.Post(LogMessageType.Error,
                    "Failed to send packet to client[{0}] - SocketError.{1}",
                    clid, err);
            }
            return err;
        }