/// <summary>
/// Finds MAC address of the gateway, when its IP address is in ipOfgateway.
/// The MAC address is stored in macOfGateway.
/// </summary>
/// <returns>
/// <c>true</c> if MAC address is found, otherwise <c>false</c>.
/// </returns>
protected bool findMACofGateway()
{
ARP arp;
if (ipOfGateway == null)
{
return(false);
}
//get list of all available interfaces
SharpPcap.LibPcap.LibPcapLiveDeviceList lldl = SharpPcap.LibPcap.LibPcapLiveDeviceList.Instance;
//find MAC address of gateway
foreach (SharpPcap.LibPcap.LibPcapLiveDevice lld in lldl)
{
arp = new ARP(lld);
try
{
macOfGateway = arp.Resolve(ipOfGateway);
Console.WriteLine("MAC of gateway: " + macOfGateway.ToString());
liveInterface = lld;
}
catch (NullReferenceException)
{
continue;
}
return(true);
}
return(false);
}
/// <summary>
/// finds the devices that are available in the network
/// </summary>
private void findDevices()
{
try
{
// Print SharpPcap version
string ver = SharpPcap.Version.VersionString;
string s = "SharpPcap" + ver + "Example1.IfList.cs";
// Retrieve the device list
SharpPcap.LibPcap.LibPcapLiveDeviceList devices = SharpPcap.LibPcap.LibPcapLiveDeviceList.Instance;
// If no devices were found print an error
if (devices.Count < 1)
{
s += "No devices were found on this machine";
return;
}
s += "\nThe following devices are available on this machine:\n----------------------------------------------------\n";
// Print out the available network devices
foreach (ICaptureDevice dev in devices)
{
string descr = dev.ToString();
string HostName = Dns.GetHostName();
IPAddress[] ipaddress = Dns.GetHostAddresses(HostName);
string ipToUse = ipaddress[1].ToString();
Debug.WriteLine("using the ip: " + ipToUse);
if (descr.Contains(ipToUse))
{
s += "Will use this one for test: \n" + descr;
device = dev;
break;
}
s += dev.ToString() + "\n";
}
int index = 1;
if (device == null)
{
device = devices[index];
}
//MessageBox.Show(s);
}
catch (Exception e)
{
MessageBox.Show("Error creating raw socket: " + e.Message);
}
}
