Esempio n. 1
0
        /// <summary>
        /// Reads a TPKT from the socket Async
        /// </summary>
        /// <param name="stream">The stream to read from</param>
        /// <returns>Task TPKT Instace</returns>
        public static async Task <TPKT> ReadAsync(Stream stream)
        {
            var buf = new byte[4];
            int len = await stream.ReadAsync(buf, 0, 4);

            if (len < 4)
            {
                throw new TPKTInvalidException("TPKT is incomplete / invalid");
            }
            var pkt = new TPKT
            {
                Version   = buf[0],
                Reserved1 = buf[1],
                Length    = buf[2] * 256 + buf[3] //BigEndian
            };

            if (pkt.Length > 0)
            {
                pkt.Data = new byte[pkt.Length - 4];
                len      = await stream.ReadAsync(pkt.Data, 0, pkt.Length - 4);

                if (len < pkt.Length - 4)
                {
                    throw new TPKTInvalidException("TPKT is incomplete / invalid");
                }
            }
            return(pkt);
        }
Esempio n. 2
0
            /// <summary>
            /// Reads COTP TPDU (Transport protocol data unit) from the network stream
            /// See: https://tools.ietf.org/html/rfc905
            /// </summary>
            /// <param name="socket">The socket to read from</param>
            /// <returns>COTP DPDU instance</returns>
            public static TPDU Read(Socket socket)
            {
                var tpkt = TPKT.Read(socket);

                if (tpkt.Length > 0)
                {
                    return(new TPDU(tpkt));
                }
                return(null);
            }
Esempio n. 3
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            /// <summary>
            /// Reads COTP TPDU (Transport protocol data unit) from the network stream
            /// See: https://tools.ietf.org/html/rfc905
            /// </summary>
            /// <param name="stream">The socket to read from</param>
            /// <returns>COTP DPDU instance</returns>
            public static TPDU Read(Stream stream)
            {
                var tpkt = TPKT.Read(stream);

                if (tpkt.Length > 0)
                {
                    return(new TPDU(tpkt));
                }
                return(null);
            }
Esempio n. 4
0
            /// <summary>
            /// Reads COTP TPDU (Transport protocol data unit) from the network stream
            /// See: https://tools.ietf.org/html/rfc905
            /// </summary>
            /// <param name="stream">The socket to read from</param>
            /// <returns>COTP DPDU instance</returns>
            public static async Task <TPDU> ReadAsync(Stream stream)
            {
                var tpkt = await TPKT.ReadAsync(stream);

                if (tpkt.Length > 0)
                {
                    return(new TPDU(tpkt));
                }
                return(null);
            }
Esempio n. 5
0
            /// <summary>
            /// Reads COTP TPDU (Transport protocol data unit) from the network stream
            /// See: https://tools.ietf.org/html/rfc905
            /// </summary>
            /// <param name="stream">The socket to read from</param>
            /// <returns>COTP DPDU instance</returns>
            public static async Task <TPDU> ReadAsync(Stream stream, CancellationToken cancellationToken)
            {
                var tpkt = await TPKT.ReadAsync(stream, cancellationToken).ConfigureAwait(false);

                if (tpkt.Length == 0)
                {
                    throw new TPDUInvalidException("No protocol data received");
                }
                return(new TPDU(tpkt));
            }
Esempio n. 6
0
            /// <summary>
            /// Reads COTP TPDU (Transport protocol data unit) from the network stream
            /// See: https://tools.ietf.org/html/rfc905
            /// </summary>
            /// <param name="stream">The socket to read from</param>
            /// <returns>COTP DPDU instance</returns>
            public static TPDU Read(Stream stream)
            {
                var tpkt = TPKT.Read(stream);

                if (tpkt.Length == 0)
                {
                    throw new TPDUInvalidException("No protocol data received");
                }
                return(new TPDU(tpkt));
            }
            /// <summary>
            /// Reads COTP TPDU (Transport protocol data unit) from the network stream
            /// See: https://tools.ietf.org/html/rfc905
            /// </summary>
            /// <param name="stream">The socket to read from</param>
            /// <returns>COTP DPDU instance</returns>
            public static async Task <TPDU> ReadAsync(Stream stream)
            {
                var tpkt = await TPKT.ReadAsync(stream);

                if (tpkt.Length == 0)
                {
                    throw new TPDUInvalidException("No protocol data received");
                }
                return(new TPDU(tpkt));
            }
Esempio n. 8
0
        /// <summary>
        /// Reds a TPKT from the socket
        /// </summary>
        /// <param name="socket">The socket to read from</param>
        /// <returns>TPKT Instace</returns>
        public static TPKT Read(Socket socket)
        {
            var buf = new byte[4];

            socket.Receive(buf, 4, SocketFlags.None);
            var pkt = new TPKT
            {
                Version   = buf[0],
                Reserved1 = buf[1],
                Length    = buf[2] * 256 + buf[3] //BigEndian
            };

            if (pkt.Length > 0)
            {
                pkt.Data = new byte[pkt.Length - 4];
                socket.Receive(pkt.Data, pkt.Length - 4, SocketFlags.None);
            }
            return(pkt);
        }
Esempio n. 9
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            public TPDU(TPKT tPKT)
            {
                var br = new BinaryReader(new MemoryStream(tPKT.Data));

                HeaderLength = br.ReadByte();
                if (HeaderLength >= 2)
                {
                    PDUType = br.ReadByte();
                    if (PDUType == 0xf0) //DT Data
                    {
                        var flags = br.ReadByte();
                        TPDUNumber   = flags & 0x7F;
                        LastDataUnit = (flags & 0x80) > 0;
                        Data         = br.ReadBytes(tPKT.Length - HeaderLength - 4); //4 = TPKT Size
                        return;
                    }
                    //TODO: Handle other PDUTypes
                }
                Data = new byte[0];
            }
Esempio n. 10
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            public TPDU(TPKT tPKT)
            {
                TPkt = tPKT;

                HeaderLength = tPKT.Data[0]; // Header length excluding this length byte
                if (HeaderLength >= 2)
                {
                    PDUType = (PduType)tPKT.Data[1];
                    if (PDUType == PduType.Data) //DT Data
                    {
                        var flags = tPKT.Data[2];
                        TPDUNumber   = flags & 0x7F;
                        LastDataUnit = (flags & 0x80) > 0;
                        Data         = new byte[tPKT.Data.Length - HeaderLength - 1]; // substract header length byte + header length.
                        Array.Copy(tPKT.Data, HeaderLength + 1, Data, 0, Data.Length);
                        return;
                    }
                    //TODO: Handle other PDUTypes
                }
                Data = new byte[0];
            }