List <NETRECORD> GetNetRecord(int targetPort)
{
IPGlobalProperties properties = IPGlobalProperties.GetIPGlobalProperties();
List <NETRECORD> lNetRecord = new List <NETRECORD>();
TcpConnectionInformation[] informations = properties.GetActiveTcpConnections();
// find remote connection info and put into a new record structure
foreach (TcpConnectionInformation inf in informations)
{
if (inf.LocalEndPoint.Port == targetPort)
{
string remoteIp = inf.RemoteEndPoint.Address.ToString();
NETRECORD netRecord1 = lNetRecord.Find((NETRECORD rec) => rec.IP == remoteIp);
if (netRecord1 == null)
{
NETRECORD record = new NETRECORD()
{
IP = remoteIp,
Port = new List <int>(),
StartTime = DateTime.Now.ToLocalTime(),
};
record.Port.Add(inf.RemoteEndPoint.Port);
lNetRecord.Add(record);
}
else
{
netRecord1.Port.Add(inf.RemoteEndPoint.Port);
}
}
}
return(lNetRecord);
}
void RefreshStatus(object TargetPort)
{
List <NETRECORD> lOldNetRecord = new List <NETRECORD>();
while (!_bIsExit)
{
List <NETRECORD> lNewNetRecord = GetNetRecord((int)TargetPort);
// compare with old record structure to find alive and count attack time
foreach (NETRECORD netRecord2 in lNewNetRecord)
{
Record record = _lNetworkRecordInThread.Find((Record rec) => rec.ip == netRecord2.IP);
if (record == null)
{
_lNetworkRecordInThread.Add(new Record()
{
ip = netRecord2.IP, last_alive = DateTime.Now.ToLocalTime()
});
record = _lNetworkRecordInThread[_lNetworkRecordInThread.Count - 1];
}
else
{
record.last_alive = DateTime.Now.ToLocalTime();
}
NETRECORD foundIP = lOldNetRecord.Find((NETRECORD rec) => rec.IP == netRecord2.IP);
if (foundIP != null)
{
// IP has been recorded
foreach (int portRecord in netRecord2.Port)
{
// new port in this IP will mark as attacks
if (foundIP.Port.IndexOf(portRecord) < 0)
{
record.count++;
}
}
// update alive time
record.alive = (uint)(record.last_alive - foundIP.StartTime).TotalSeconds;
}
else
{
// not match any records
foreach (int portRecord in netRecord2.Port)
{
record.count++;
}
}
}
// change new record start time to old record's
foreach (NETRECORD netRecord3 in lOldNetRecord)
{
NETRECORD foundIP = lNewNetRecord.Find((NETRECORD rec) => rec.IP == netRecord3.IP);
if (foundIP != null)
{
foundIP.StartTime = netRecord3.StartTime;
}
}
// new record -> old record
lOldNetRecord = lNewNetRecord;
if (_bStartCopy)
{
using (Stream objStream = new MemoryStream())
{
IFormatter formatter = new BinaryFormatter();
formatter.Serialize(objStream, _lNetworkRecordInThread);
objStream.Seek(0, SeekOrigin.Begin);
_lNetworkRecord = (List <Record>)formatter.Deserialize(objStream);
}
_bStartCopy = false;
}
Thread.Sleep(50);
}
}