//adding ARP log
private void handlerARP(Packet packet)
{
byte[] senderMACbyte = packet.Ethernet.Arp.SenderHardwareAddress.ToArray();
String senderMAC = (BitConverter.ToString(senderMACbyte)).Replace("-", ":");
byte[] senderIPbyte = packet.Ethernet.Arp.SenderProtocolAddress.ToArray();
String senderIP = "" + senderIPbyte[0] + "." + senderIPbyte[1] + "." + senderIPbyte[2] + "." + senderIPbyte[3];
logARP log = new logARP(senderIP, senderMAC, timeARP);
int key = log.accessMAC.GetHashCode();
if (hashARP[key] == null)
{
addARPline(log);
hashARP.Add(key, log);
listMAC.Add(log.accessMAC);
}
else
{
logARP actual = (logARP)hashARP[key];
actual.accessIP = senderIP;
actual.accessMAC = senderMAC;
actual.accessTTL = timeARP;
}
String targetMAC = PcapDotNet.Core.Extensions.LivePacketDeviceExtensions.GetMacAddress(allDevices[DEV0]).ToString();
byte[] targetMACbyte = targetMAC.Split(':').Select(x => Convert.ToByte(x, 16)).ToArray();
String targetIP = textboxIP1.Text.ToString();
byte[] targetIPbyte = targetIP.Split('.').Select(x => Convert.ToByte(x, 10)).ToArray();
byte[] tempIPbyte = packet.Ethernet.Arp.TargetProtocolAddress.ToArray();
String tempIP = "" + tempIPbyte[0] + "." + tempIPbyte[1] + "." + tempIPbyte[2] + "." + tempIPbyte[3];
if (textboxIP1.Text.Equals(tempIP.ToString()))
{
if (packet.Ethernet.Arp.Operation.ToString().Equals("Request"))
{
Packet replyPacket = PacketBuilder.Build(
DateTime.Now,
new EthernetLayer
{
Source = new MacAddress(targetMAC),
Destination = new MacAddress(senderMAC),
EtherType = EthernetType.Arp
},
new ArpLayer
{
ProtocolType = EthernetType.IpV4,
Operation = ArpOperation.Reply,
SenderHardwareAddress = targetMACbyte.AsReadOnly(),
SenderProtocolAddress = targetIPbyte.AsReadOnly(),
TargetHardwareAddress = senderMACbyte.AsReadOnly(),
TargetProtocolAddress = senderIPbyte.AsReadOnly(),
});
dev0.SendPacket(replyPacket);
}
}
}
//adding ARPlog to ARP GUI table
private void addARPline(logARP log)
{
ListViewItem lineARP = new ListViewItem(log.accessIP);//adding to GUI table
lineARP.SubItems.Add(log.accessMAC.ToString());
lineARP.SubItems.Add(log.accessTTL.ToString());
Invoke(new MethodInvoker(delegate() { tableARP.Items.Add(lineARP); }));
}
//Function: Return the ARP log of current destination mathich nexthop
private logARP lookupARP(String nexthop)
{
foreach (String actual in listMAC)
{
logARP log = (logARP)hashARP[actual.GetHashCode()];
if (log.accessIP.Equals(nexthop))
{
return(log);
}
}
return(null);
}
public void periodARP(Object source, ElapsedEventArgs e)
{
for (int i = listMAC.Count - 1; i >= 0; i--)
{
logARP log = (logARP)hashARP[listMAC[i].GetHashCode()];
if (log.accessTTL > 1)
{
log.reduce();
}
else
{
lock (hashARP) { hashARP.Remove(listMAC[i].GetHashCode()); }
lock (listMAC) { listMAC.RemoveAt(i); };
}
}
}
private void pinger()
{
Route route = findNexthopRoute(textboxARPtarget.Text);
logARP log = null;
if (route.Nexthop.Equals("directly connected"))
{
log = lookupARP(textboxARPtarget.Text);
}
else
{
log = lookupARP(route.Nexthop);
}
if (log == null)
{
requestARP();
}
Thread.Sleep(10);
if (route.Nexthop.Equals("directly connected"))
{
log = lookupARP(textboxARPtarget.Text);
}
else
{
log = lookupARP(route.Nexthop);
}
try
{
ping.Request(dev0, myMAC1.ToString(), log.accessMAC, textboxIP1.Text, log.accessIP);
}
catch (Exception delay)
{
}
}
