/// <summary>
        /// Decodes the message.
        /// </summary>
        /// <param name="buffer">The buffer.</param>
        /// <param name="offsetFrom">The offset.</param>
        /// <param name="offsetTo">The offset to.</param>
        /// <param name="message">The message.</param>
        /// <param name="isIncomplete">if set to <c>true</c> the message is incomplete.</param>
        /// <returns>
        /// True if decoding was successful; false otherwise.
        /// </returns>
        public static bool TryDecode(byte[] buffer, ref int offsetFrom, int offsetTo, out InterestedMessage message, out bool isIncomplete)
        {
            int  messageLength;
            byte messageId;

            message      = null;
            isIncomplete = false;

            if (buffer != null &&
                buffer.Length >= offsetFrom + MessageLengthLength + MessageIdLength + PayloadLength &&
                offsetFrom >= 0)
            {
                messageLength = Message.ReadInt(buffer, ref offsetFrom);
                messageId     = Message.ReadByte(buffer, ref offsetFrom);

                if (messageLength == MessageLength &&
                    messageId == MessageId)
                {
                    if (offsetFrom <= offsetTo)
                    {
                        message = new InterestedMessage();
                    }
                    else
                    {
                        isIncomplete = true;
                    }
                }
            }

            return(message != null);
        }
Exemple #2
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        /// <summary>
        /// Decodes the message.
        /// </summary>
        /// <param name="buffer">The buffer.</param>
        /// <param name="offsetFrom">The offset from.</param>
        /// <param name="offsetTo">The offset to.</param>
        /// <param name="message">The message.</param>
        /// <param name="isIncomplete">if set to <c>true</c> the message is incomplete.</param>
        /// <returns>
        /// True if decoding was successful; false otherwise.
        /// </returns>
        public static bool TryDecode(byte[] buffer, ref int offsetFrom, int offsetTo, out PeerMessage message, out bool isIncomplete)
        {
            byte messageId;
            int  messageLength;
            int  offset2 = offsetFrom;

            message      = null;
            isIncomplete = false;

            if (buffer.IsNotNullOrEmpty() &&
                buffer.Length >= offsetFrom + Message.IntLength + Message.ByteLength)
            {
                messageLength = Message.ReadInt(buffer, ref offset2);
                messageId     = Message.ReadByte(buffer, ref offset2);

                offset2 = offsetFrom; // reset offset

                ////if (messageLength == 0)
                ////{
                ////	KeepAliveMessage message2;
                ////	KeepAliveMessage.TryDecode(buffer, ref offset2, out message2);

                ////	message = message2;
                ////}
                if (messageId == ChokeMessage.MessageId)
                {
                    ChokeMessage message2;
                    ChokeMessage.TryDecode(buffer, ref offset2, offsetTo, out message2, out isIncomplete);

                    message = message2;
                }
                else if (messageId == UnchokeMessage.MessageId)
                {
                    UnchokeMessage message2;
                    UnchokeMessage.TryDecode(buffer, ref offset2, offsetTo, out message2, out isIncomplete);

                    message = message2;
                }
                else if (messageId == InterestedMessage.MessageId)
                {
                    InterestedMessage message2;
                    InterestedMessage.TryDecode(buffer, ref offset2, offsetTo, out message2, out isIncomplete);

                    message = message2;
                }
                else if (messageId == UninterestedMessage.MessageId)
                {
                    UninterestedMessage message2;
                    UninterestedMessage.TryDecode(buffer, ref offset2, offsetTo, out message2, out isIncomplete);

                    message = message2;
                }
                else if (messageId == HaveMessage.MessageId)
                {
                    HaveMessage message2;
                    HaveMessage.TryDecode(buffer, ref offset2, offsetTo, out message2, out isIncomplete);

                    message = message2;
                }
                else if (messageId == BitFieldMessage.MessageId)
                {
                    BitFieldMessage message2;
                    BitFieldMessage.TryDecode(buffer, ref offset2, offsetTo, out message2, out isIncomplete);

                    message = message2;
                }
                else if (messageId == RequestMessage.MessageId)
                {
                    RequestMessage message2;
                    RequestMessage.TryDecode(buffer, ref offset2, offsetTo, out message2, out isIncomplete);

                    message = message2;
                }
                else if (messageId == CancelMessage.MessageId)
                {
                    CancelMessage message2;
                    CancelMessage.TryDecode(buffer, ref offset2, offsetTo, out message2, out isIncomplete);

                    message = message2;
                }
                else if (messageId == PortMessage.MessageId)
                {
                    PortMessage message2;
                    PortMessage.TryDecode(buffer, ref offset2, offsetTo, out message2, out isIncomplete);

                    message = message2;
                }
                else if (messageId == PieceMessage.MessageId)
                {
                    PieceMessage message2;
                    PieceMessage.TryDecode(buffer, ref offset2, offsetTo, out message2, out isIncomplete);

                    message = message2;
                }
                else
                {
                    HandshakeMessage message2;
                    HandshakeMessage.TryDecode(buffer, ref offset2, offsetTo, out message2, out isIncomplete);

                    message = message2;
                }
            }

            if (message != null)
            {
                offsetFrom = offset2;
            }

            return(message != null);
        }