Exemple #1
0
        internal static bool TryBuild(CitpRecieveData data, out CitpPacket packet)
        {
            CitpHeader header = new CitpHeader(string.Empty);

            packet = header;

            try
            {
                //We have read all the data.
                if (data.EndOfData())
                {
                    data.Reset();
                    return(false);
                }

                //Check we have enough data to construct the header.
                if (data.Length - data.ReadPosition < CitpHeader.PacketSize)
                {
                    return(false);
                }

                //Read the packet header.
                header.ReadData(data.GetReader());

                //Ensure the header packet is valid
                if (!header.IsValid())
                {
                    //Purge data as it is probably corrupted.
                    data.Reset();        //Reset position to start so we dump the data.
                    return(false);
                }

                //Read the sub packet
                switch (header.ContentType)
                {
                case CitpPInfHeader.PacketType:
                    packet = BuildPInf(data);
                    break;

                case SDmxHeader.PacketType:
                    packet = BuildSDmx(data);
                    break;

                case FPtcHeader.PacketType:
                    packet = BuildFPtc(data);
                    break;

                case FSelHeader.PacketType:
                    packet = BuildFSel(data);
                    break;

                case CitpMsexHeader.PacketType:
                    packet = BuildMsex(data);
                    break;

                case CaExHeader.PacketType:
                    packet = BuildCaEx(data);
                    break;

                case FInfHeader.PacketType:
                    packet = BuildFInf(data);
                    break;

                default:
                    packet = null;
                    break;
                }

                //Advance the read and write pointers past the successfully read packet.
                data.ReadPosition += header.MessageSize;
            }
            catch (EndOfStreamException)
            {
                return(false);
            }

            //We have managed to read the packet even if it was unknown and set to null so lets return true
            return(true);
        }
Exemple #2
0
        internal static bool TryBuild(CitpReceiveData data, out CitpPacket packet)
        {
            CitpHeader header = new CitpHeader(string.Empty);

            packet = header;

            try
            {
                //We have read all the data.
                if (data.EndOfData())
                {
                    data.Reset();
                    return(false);
                }

                //Check we have enough data to construct the header.
                if (data.Length - data.ReadPosition < CitpHeader.PacketSize)
                {
                    return(false);
                }

                //Read the packet header.
                header.ReadData(data.GetReader());

                //Ensure the header packet is valid
                if (!header.IsValid())
                {
                    //Purge data as it is probably corrupted.
                    data.Reset();        //Reset position to start so we dump the data.
                    return(false);
                }

                //Read the sub packet
                switch (header.ContentType)
                {
                case CitpPInfHeader.PacketType:
                    packet = BuildPInf(data);
                    break;

                case SDmxHeader.PacketType:
                    packet = BuildSDmx(data);
                    break;

                case FPtcHeader.PacketType:
                    packet = BuildFPtc(data);
                    break;

                case FSelHeader.PacketType:
                    packet = BuildFSel(data);
                    break;

                case CitpMsexHeader.PacketType:
                    packet = BuildMsex(data);
                    break;

                case CaExHeader.PacketType:
                    packet = BuildCaEx(data);
                    break;

                default:
                    return(false);
                }
            }
            catch (EndOfStreamException)
            {
                return(false);
            }

            return(packet != null);
        }