Ejemplo n.º 1
0
        public void WriteFrame(PcapPacket frame, bool flush)
        {
            lock (this)
            {
                TimeSpan delta = frame.Timestamp.Subtract(this.referenceTime);
                //The smallest unit of time is the tick, which is equal to 100 nanoseconds. A tick can be negative or positive.
                long   totalMicroseconds = delta.Ticks / 10;
                uint   seconds           = (uint)(totalMicroseconds / 1000000);
                uint   microseconds      = (uint)(totalMicroseconds % 1000000);
                byte[] headerData        = ToByteArray(frame.Header);

                fileStream.Write(ToByteArray(seconds), 0, 4);
                fileStream.Write(ToByteArray(microseconds), 0, 4);
                //number of octets of packet saved in file
                fileStream.Write(ToByteArray((uint)frame.Data.Length + headerData.Length), 0, 4);
                //actual length of packet
                fileStream.Write(ToByteArray((uint)frame.Data.Length + headerData.Length), 0, 4);
                //data
                fileStream.Write(headerData, 0, headerData.Length);

                fileStream.Write(frame.Data, 0, frame.Data.Length);
                if (flush)
                {
                    fileStream.Flush();
                }
            }
        }
Ejemplo n.º 2
0
        void backgroundFileReader_DoWork(object sender, System.ComponentModel.DoWorkEventArgs e)
        {
            DateTime firstFrameTimestamp = DateTime.MinValue;
            DateTime lastFrameTimestamp  = DateTime.MinValue;
            int      framesCount         = 0;

            try
            {
                while (!this.backgroundFileReader.CancellationPending && fileStream.Position + 1 < fileStream.Length)
                {
                    if (this.packetQueue.Count < this.packetQueueSize)
                    {
                        PcapPacket packet = ReadPcapPacket();
                        if (firstFrameTimestamp == DateTime.MinValue)
                        {
                            firstFrameTimestamp = packet.Timestamp;
                        }
                        lastFrameTimestamp = packet.Timestamp;
                        framesCount++;
                        lock (this.packetQueue)
                        {
                            this.packetQueue.Enqueue(packet);
                        }
                        this.enqueuedByteCount += packet.Data.Length;
                    }
                    else
                    {
                        System.Threading.Thread.Sleep(20);
                    }
                }
            }
            catch (Exception ex)
            {
                e.Cancel = true;
                e.Result = ex.Message;
                this.AbortFileRead();
            }
            //do a callback with this.filename as well as first and last timestamp
            if (this.readCompletedCallback != null && firstFrameTimestamp != DateTime.MinValue && lastFrameTimestamp != DateTime.MinValue)
            {
                this.readCompletedCallback(this.filename, framesCount, firstFrameTimestamp, lastFrameTimestamp);
            }
        }
Ejemplo n.º 3
0
 public void WriteFrame(PcapPacket frame)
 {
     WriteFrame(frame, false);
 }