void Listening() // Lang nghe goi dhcp
{
while (true)
{
IPEndPoint IpEnd = new IPEndPoint(IPAddress.Any, 0);
Byte[] recvBytes = udpclient.Receive(ref IpEnd);
DHCPPacket packet = new DHCPPacket();
packet.BytesToDHCPPacket(recvBytes); // chuyen goi tin tu dang byte sang dang DHCPPacket
ListPacket.Add(packet);
Display_Message(packet); // Hien thi goi len mang hinh
HandlePacket(packet); // xu li goi vua nhan
}
}
HashSet <string> xid; // Cac xid dang giao tiep
void Listening()
{
while (true)
{
IPEndPoint IpEnd = new IPEndPoint(IPAddress.Any, 0);
Byte[] recvBytes = udpclient.Receive(ref IpEnd);
DHCPPacket packet = new DHCPPacket();
packet.BytesToDHCPPacket(recvBytes);
ListPacket.Add(packet);
DisplayPacket(packet);
HandlePacket(packet);
}
}
private void btnExtendIP_Click(object sender, EventArgs e) // Extend button
{
if (haveip)
{
Send_DHCPRequest(offer_saved, DHCPServer_IP, 2);
}
else
{
FileStream fs;
try
{
fs = new FileStream("IP", FileMode.Open);
byte[] load = new byte[376];
fs.Read(load, 0, 376);
fs.Close();
offer_saved.BytesToDHCPPacket(load);
List <byte[]> Option = offer_saved.optionsplit();
for (int j = 0; j < Option.Count(); j++)
{
if (Option[j][0] == 54) // server dhcp minh da chon
{
for (int z = 0; z < 4; z++)
{
DHCPServer_IP[z] = Option[j][z + 2];
}
break;
}
}
Send_DHCPRequest(offer_saved, DHCPServer_IP, 3);
}
catch (Exception z)
{
MessageBox.Show(z.Message);
return;
}
}
}