private void arpListener()
{
byte[] pkt_data = null;
packet_headers pkt_hdr = null;
isListeningArp = true;
do
{
if (pcaparp.pcapnet_next_ex(out pkt_hdr, out pkt_data) == 0)
{
continue;
}
byte[] array = new byte[6];
Array.Copy(pkt_data, 6, array, 0, 6);
if (tools.areValuesEqual(array, localMAC))
{
continue;
}
byte b = pkt_data[21];
if (b.ToString().CompareTo("2") == 0)
{
byte[] array2 = new byte[4];
byte[] array3 = new byte[6];
Array.Copy(pkt_data, 22, array3, 0, 6);
Array.Copy(pkt_data, 28, array2, 0, 4);
PC pC = new PC();
pC.ip = new IPAddress(array2);
pC.mac = new PhysicalAddress(array3);
pC.capDown = 0;
pC.capUp = 0;
pC.isLocalPc = false;
pC.name = "";
pC.nbPacketReceivedSinceLastReset = 0;
pC.nbPacketSentSinceLastReset = 0;
pC.redirect = true;
DateTime now = DateTime.Now;
pC.timeSinceLastRarp = now;
pC.totalPacketReceived = 0;
pC.totalPacketSent = 0;
if (tools.areValuesEqual(array2, routerIP))
{
routerMAC = array;
pC.isGateway = true;
}
else
{
pC.isGateway = false;
}
pcList.addPcToList(pC);
}
}while (isListeningArp);
arpListenerThreadTerminated.Set();
}
private async void arpListener()
{
byte[] numArray = null;
packet_headers packetHeader = null;
isListeningArp = true;
do
{
if (pcaparp.pcapnet_next_ex(out packetHeader, out numArray) == 0)
{
continue;
}
byte[] numArray1 = new byte[6];
Array.Copy(numArray, 6, numArray1, 0, 6);
if (tools.areValuesEqual(numArray1, localMAC) || numArray[21].ToString().CompareTo("2") != 0)
{
continue;
}
byte[] numArray2 = new byte[4];
byte[] numArray3 = new byte[6];
Array.Copy(numArray, 22, numArray3, 0, 6);
Array.Copy(numArray, 28, numArray2, 0, 4);
PC pC = new PC()
{
ip = new IPAddress(numArray2),
mac = new PhysicalAddress(numArray3),
CapDown = 0,
CapUp = 0,
isLocalPc = false,
name = "",
nbPacketReceivedSinceLastReset = 0,
nbPacketSentSinceLastReset = 0,
redirect = true,
timeSinceLastRarp = DateTime.Now,
totalPacketReceived = 0,
totalPacketSent = 0
};
if (!tools.areValuesEqual(numArray2, routerIP))
{
pC.isGateway = false;
}
else
{
routerMAC = numArray1;
pC.isGateway = true;
}
pcList.addPcToList(pC);
await Task.Delay(20);
}while (isListeningArp);
//arpListenerThreadTerminated.Set();
}
private void redirector()
{
byte[] pkt_data = null;
packet_headers pkt_hdr = null;
isRedirecting = true;
byte[] array = new byte[6];
byte[] array2 = new byte[4];
byte[] array3 = new byte[4];
PC router = pcList.getRouter();
if (router != null)
{
routerMAC = router.mac.GetAddressBytes();
}
if (routerMAC == null)
{
MessageBox.Show("no router found to redirect packet");
isRedirecting = false;
return;
}
if (isRedirecting)
{
do
{
if (pcapredirect.pcapnet_next_ex(out pkt_hdr, out pkt_data) == 0)
{
continue;
}
Array.Copy(pkt_data, 6, array, 0, 6);
if (tools.areValuesEqual(array, localMAC))
{
Array.Copy(pkt_data, 26, array2, 0, 4);
if (tools.areValuesEqual(array2, localIP))
{
pcList.getLocalPC().nbPacketSentSinceLastReset += (int)pkt_hdr.caplen;
}
continue;
}
if (tools.areValuesEqual(array, routerMAC))
{
Array.Copy(pkt_data, 30, array3, 0, 4);
if (tools.areValuesEqual(array3, localIP))
{
pcList.getLocalPC().nbPacketReceivedSinceLastReset += (int)pkt_hdr.caplen;
continue;
}
PC pCFromIP = pcList.getPCFromIP(array3);
if (pCFromIP != null)
{
int capDown = pCFromIP.capDown;
if ((capDown == 0 || capDown > pCFromIP.nbPacketReceivedSinceLastReset) && pCFromIP.redirect)
{
Array.Copy(pCFromIP.mac.GetAddressBytes(), 0, pkt_data, 0, 6);
Array.Copy(localMAC, 0, pkt_data, 6, 6);
pcapredirect.pcapnet_sendpacket(pkt_data);
pCFromIP.nbPacketReceivedSinceLastReset += (int)pkt_hdr.caplen;
}
}
continue;
}
Array.Copy(pkt_data, 30, array3, 0, 4);
if (tools.areValuesEqual(array3, localIP))
{
continue;
}
PC pCFromMac = pcList.getPCFromMac(array);
if (pCFromMac != null)
{
int capUp = pCFromMac.capUp;
if ((capUp == 0 || capUp > pCFromMac.nbPacketSentSinceLastReset) && pCFromMac.redirect)
{
Array.Copy(routerMAC, 0, pkt_data, 0, 6);
Array.Copy(localMAC, 0, pkt_data, 6, 6);
pcapredirect.pcapnet_sendpacket(pkt_data);
pCFromMac.nbPacketSentSinceLastReset += (int)pkt_hdr.caplen;
}
}
}while (isRedirecting);
}
redirectorThreadTerminated.Set();
}
private void redirector()
{
byte[] numArray = null;
packet_headers packetHeader = null;
isRedirecting = true;
byte[] numArray1 = new byte[6];
byte[] numArray2 = new byte[4];
byte[] numArray3 = new byte[4];
PC router = pcList.getRouter();
if (router != null)
{
routerMAC = router.mac.GetAddressBytes();
}
if (routerMAC != null)
{
if (isRedirecting)
{
do
{
if (pcapredirect.pcapnet_next_ex(out packetHeader, out numArray) == 0)
{
continue;
}
Array.Copy(numArray, 6, numArray1, 0, 6);
if (tools.areValuesEqual(numArray1, localMAC))
{
Array.Copy(numArray, 26, numArray2, 0, 4);
if (!tools.areValuesEqual(numArray2, localIP))
{
continue;
}
pcList.getLocalPC().nbPacketSentSinceLastReset += (int)packetHeader.caplen;
}
else if (!tools.areValuesEqual(numArray1, routerMAC))
{
Array.Copy(numArray, 30, numArray3, 0, 4);
if (tools.areValuesEqual(numArray3, localIP))
{
continue;
}
PC pCFromMac = pcList.getPCFromMac(numArray1);
if (pCFromMac == null)
{
continue;
}
int num = pCFromMac.CapUp;
if (num != 0 && num <= pCFromMac.nbPacketSentSinceLastReset || !pCFromMac.redirect)
{
continue;
}
Array.Copy(routerMAC, 0, numArray, 0, 6);
Array.Copy(localMAC, 0, numArray, 6, 6);
pcapredirect.pcapnet_sendpacket(numArray);
pCFromMac.nbPacketSentSinceLastReset += (int)packetHeader.caplen;
}
else
{
Array.Copy(numArray, 30, numArray3, 0, 4);
if (!tools.areValuesEqual(numArray3, localIP))
{
PC pCFromIP = pcList.getPCFromIP(numArray3);
if (pCFromIP == null)
{
continue;
}
int num1 = pCFromIP.CapDown;
if (num1 != 0 && num1 <= pCFromIP.nbPacketReceivedSinceLastReset || !pCFromIP.redirect)
{
continue;
}
Array.Copy(pCFromIP.mac.GetAddressBytes(), 0, numArray, 0, 6);
Array.Copy(localMAC, 0, numArray, 6, 6);
pcapredirect.pcapnet_sendpacket(numArray);
pCFromIP.nbPacketReceivedSinceLastReset += (int)packetHeader.caplen;
}
else
{
pcList.getLocalPC().nbPacketReceivedSinceLastReset += (int)packetHeader.caplen;
}
}
}while (isRedirecting);
}
//redirectorThreadTerminated.Set();
}
else
{
MessageBox.Show("no router found to redirect packet");
isRedirecting = false;
}
}
