private void OpenCaptureFile()
{
if (!capturedPacketsHaveBeenSaved)
{
DialogResult userWish = ShowDialogAskingUserToSaveCaptureData(ActionType.OpeningCaptureFile);
if (userWish == DialogResult.OK)
{
SaveCapturedPacketsToFile();
}
else if (userWish == DialogResult.Cancel)
{
return;
}
}
// Nullify the packets counter and clear the structures that keep
// the captured packets info
ClearDataStructures();
capturedPacketsHaveBeenSaved = true;
// Get an offline file pcap device
PcapDevice offlineDevice = new PcapOfflineDevice(openCaptureFileDialog.FileName);
try
{
Cursor = Cursors.WaitCursor;
// Open the device for capturing
offlineDevice.Open();
// Register our handler function to the "packet arrival" event
offlineDevice.OnPacketArrival += new Pcap.PacketArrivalEvent(device_OnPacketArrival);
// Start capture "INFINTE" number of packets
// This method will return when EOF reached.
offlineDevice.Capture(Pcap.INFINITE);
// Set the MainForm text
SetMainFormText(String.Format("{0} - Wi-Fi Sniffer", Path.GetFileName(openCaptureFileDialog.FileName)));
// Set the status labels texts
SetStatusLabelsTexts(String.Format("File: \"{0}\"", openCaptureFileDialog.FileName), packetsCount == 0 ? "| No packets" : String.Format("| Displayed packets: {0}", packetsCount));
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
finally
{
// Close the pcap device
offlineDevice.Close();
Cursor = Cursors.Default;
}
}