OctoTorrent.Client.Messages.PeerMessage.DecodeMessage C# (CSharp) Method

        public static PeerMessage DecodeMessage(byte[] buffer, int offset, int count, TorrentManager manager)
        {
            CreateMessage creator;

            if (count < 4)
                throw new ArgumentException("A message must contain a 4 byte length prefix");

            var messageLength = IPAddress.HostToNetworkOrder(BitConverter.ToInt32(buffer, offset));

            if (messageLength > (count - 4))
                throw new ArgumentException("Incomplete message detected");

            if (buffer[offset + 4] == ExtensionMessage.MessageId)
                return ExtensionMessage.DecodeMessage(buffer, offset + 4 + 1, count - 4 - 1, manager);

            if (!MessageDict.TryGetValue(buffer[offset + 4], out creator))
                throw new ProtocolException("Unknown message received");

            // The message length is given in the second byte and the message body follows directly after that
            // We decode up to the number of bytes Received. If the message isn't complete, throw an exception
            var message = creator(manager);
            message.Decode(buffer, offset + 4 + 1, count - 4 - 1);
            return message;
        }