public static bool GetProcessUDPConns(ref MIB_UDPTABLE_OWNER_PID UdpConns)
{
UInt32* ptable = (UInt32*)IntPtr.Zero;
UInt32 dwSize = 0;
GetExtendedUdpTable((IntPtr)ptable, ref dwSize, true, AFType.AF_INET, UDP_TABLE_CLASS.UDP_TABLE_OWNER_PID, 0);
char* tmp = stackalloc char[(int)dwSize];
ptable = (UInt32*)tmp;
if (GetExtendedUdpTable((IntPtr)ptable, ref dwSize, true, AFType.AF_INET, UDP_TABLE_CLASS.UDP_TABLE_OWNER_PID, 0) != NO_ERROR)
return false;
UdpConns.dwNumEntries = ptable[0];
UdpConns.table = new MIB_UDPROW_OWNER_PID[UdpConns.dwNumEntries];
MIB_UDPROW_OWNER_PID * row = (MIB_UDPROW_OWNER_PID*)&ptable[1];
UInt32 j = 0;
for (int i = 0; i < UdpConns.dwNumEntries; i++)
{
if(!IP.specialIP(row[i].dwLocalAddr))
UdpConns.table[j++] = row[i];
}
UdpConns.dwNumEntries = j;
return true;
}
public static HashSet<UInt32> netActiveProcesses()
{
HashSet<UInt32> processes = new HashSet<UInt32>();
MIB_UDPTABLE_OWNER_PID utable = new MIB_UDPTABLE_OWNER_PID();
bool res = GetProcessUDPConns(ref utable);
if(res)
{
for(int i = 0; i < utable.dwNumEntries; i++)
{
MIB_UDPROW_OWNER_PID urow = utable.table[i];
if (!processes.Contains(urow.dwOwningPid))
processes.Add(urow.dwOwningPid);
}
}
MIB_TCPTABLE_OWNER_PID ttable = new MIB_TCPTABLE_OWNER_PID();
res = GetProcessTCPConns(ref ttable);
if(res)
{
for(int i = 0; i < ttable.dwNumEntries; i++)
{
MIB_TCPROW_OWNER_PID trow = ttable.table[i];
if (!processes.Contains(trow.dwOwningPid) && tcpActive(trow))
processes.Add(trow.dwOwningPid);
}
}
return processes;
}