/// <summary>
/// ARP replies are handled here.
/// </summary>
/// <param name="e">ARP Reply event args</param>
private static void ARP_OnARPReply(ARPReplyArgs e)
{
// get hostname of IP
Console.WriteLine("ARP reply received from " + e.IPV4.ToString());
Console.WriteLine("Attempting to look up hostname.");
String hostname;
try {
IPHostEntry iphe = Dns.GetHostByAddress(e.IPV4);
hostname = iphe.HostName;
}
catch (SocketException) {
Console.WriteLine("Hostname lookup failed.");
hostname = "UNKNOWN";
}
NetworkDevice nd = new NetworkDevice(e.IPV4, e.MAC, hostname);
HostFoundArgs ha = new HostFoundArgs(nd);
OnHostFound(ha);
}
/// <summary>
/// Send an ARP broadcast to a specified destination.
/// The OnARPReply Event will be raised when a message is received.
/// </summary>
/// <param name="ipv4">A valid IPv4 address.</param>
public static void SendARPMessageIPv4(object ipv4)
{
IPAddress dst = IPAddress.Parse(ipv4.ToString());
byte[] macAddr = new byte[6];
uint macAddrLen = (uint)macAddr.Length;
//Console.WriteLine("ARP message sent to " + dst);
if (SendARP((int)dst.Address, 0, macAddr, ref macAddrLen) == 0) {
// arp reply received
string[] str = new string[(int)macAddrLen];
for (int i = 0; i < macAddrLen; i++)
str[i] = macAddr[i].ToString("x2");
String mac = string.Join("-", str);
ARPReplyArgs arpArg = new ARPReplyArgs(mac, dst);
OnARPReply(arpArg);
}
}