private void dgPackets_SelectionChanged(object sender, SelectionChangedEventArgs e)
{
// Lấy thông tin của gói tin đang được chọn trong DataGrid hiển thị chi tiết buffer
PacketInfo packetInfo = (PacketInfo)dgPackets.SelectedItem;
if (packetInfo != null)
{
tbxBuffer.Text = packetInfo.Buffer.Buffer;
tbxDecode.Text = packetInfo.Buffer.Content;
UpdateLayers(packetInfo.Layers);
}
}
void wincap_OnReceivePacket(object sender, PacketHeader p, byte[] s)
{
if (p.Caplength >= p.Length) // no point in trying to handle incomplete packets
{
PacketInfo data = new PacketInfo();
data.Data = s;
data.TimeStamp = p.TimeStamp;
data.Length = (uint)s.Length;
data.StartIndex = 14;
nrOfCapturedPackets++;
if (DataReceived != null)
{
DataReceived(data);
}
}
}
protected virtual void ThreadFunction()
{
running = true;
try
{
while (running && file.Position < file.Length)
{
uint packetRecordLength = 0;
PACKET_ITEM PItem = new PACKET_ITEM();
switch (FileFormat)
{
case Format.WINPCAP:
PItem.Seconds = Function.Get4BytesFromStream(file, Const.VALUE);
PItem.MicroSeconds = Function.Get4BytesFromStream(file, Const.VALUE);
PItem.CaptureLength = Function.Get4BytesFromStream(file, Const.VALUE);
PItem.PacketLength = Function.Get4BytesFromStream(file, Const.VALUE);
break;
case Format.XCP001:
ulong timestamp = Function.Get4BytesFromStream(file, Const.VALUE);
PItem.Seconds = (uint)(timestamp / 1000000000);
uint millseconds = (uint)((timestamp / 1000000) % 1000);
uint counter = (uint)(timestamp % 1000);
PItem.MicroSeconds = millseconds * 1000 + counter;
file.Position += 6;
PItem.CaptureLength = Function.Get2BytesFromStream(file, Const.VALUE);
PItem.PacketLength = PItem.CaptureLength;
file.Position += 16;
break;
case Format.XCP002:
ulong temp2 = Function.Get8BytesFromStream(file, Const.VALUE);
PItem.Seconds = (uint)(temp2 / 1000000);
PItem.MicroSeconds = (uint)(temp2 % 1000000);
PItem.CaptureLength = Function.Get2BytesFromStream(file, Const.VALUE);
PItem.PacketLength = Function.Get2BytesFromStream(file, Const.VALUE);
file.Position += 28;
break;
case Format.SUNSNOOP:
PItem.CaptureLength = Function.Get4BytesFromStream(file, Const.NORMAL);
PItem.PacketLength = Function.Get4BytesFromStream(file, Const.NORMAL);
packetRecordLength = Function.Get4BytesFromStream(file, Const.NORMAL);
uint droppedPackets = Function.Get4BytesFromStream(file, Const.NORMAL);
ulong temp3 = Function.Get8BytesFromStream(file, Const.NORMAL);
PItem.Seconds = (uint)(temp3 / 1000000);
PItem.MicroSeconds = (uint)(temp3 % 1000000);
break;
}
PacketInfo data = new PacketInfo();
data.Data = new byte[PItem.CaptureLength];
data.StartIndex = 14; // skip MAC (6 bytes) x 2 + packet type (2 bytes)
file.Read(data.Data, 0, (int)PItem.CaptureLength);
data.TimeStamp = BaseTime + new TimeSpan((long)PItem.Seconds * 10000000 + (long)PItem.MicroSeconds * 10);
data.Length = PItem.CaptureLength;
if (FileFormat == Format.SUNSNOOP)
{
file.Position += (packetRecordLength - PItem.CaptureLength - 24);
}
// Increases the progress bar's value based on the size of
// the file currently being read.
snifferObj.Invoke(snifferObj.IncrementStepInProgressHandler, new object[] { (int)data.Length });
OnDataReceived(data);
}
//Close the file after reading file
file.Close();
}
catch (Exception e)
{
ErrorHandler(e.Message + "\r\n" + e.TargetSite + "\r\n" + e.StackTrace);
}
finally
{
bool stopped = tcp.TCPStopAnalyse();
if (stopped)
{
snifferObj.Invoke(snifferObj.UpdateUIControlsHandler);
}
}
}
protected void OnDataReceived(PacketInfo data)
{
DataReceived(data);
}
/// <summary>
/// Cập nhật datagrid mỗi khi bắt được một gói tin, hàm này được gọi bởi một lớp bên ngoài nên phải dùng Dispatcher.Invoke
/// </summary>
/// <param name="packet"></param>
private void UpdateDataGrid(PacketInfo packet)
{
Dispatcher.Invoke(() => dgPackets.Items.Add(packet)); // bắt được gói tin thì cập nhật vào list
UpdateOthers();
}