public static bool GetProcessTCPConns(ref MIB_TCPTABLE_OWNER_PID ExConns)
{
UInt32* ptable = (UInt32*)IntPtr.Zero;
UInt32 dwSize = 0;
GetExtendedTcpTable((IntPtr)ptable, ref dwSize, true, AFType.AF_INET, TCP_TABLE_CLASS.TCP_TABLE_OWNER_PID_ALL, 0);
char* tmp = stackalloc char[(int)dwSize];
ptable = (UInt32*)tmp;
if (GetExtendedTcpTable((IntPtr)ptable, ref dwSize, true, AFType.AF_INET, TCP_TABLE_CLASS.TCP_TABLE_OWNER_PID_ALL, 0) != NO_ERROR)
return false;
ExConns.dwNumEntries = (UInt32)ptable[0];
ExConns.table = new MIB_TCPROW_OWNER_PID[ExConns.dwNumEntries];
MIB_TCPROW_OWNER_PID * row = (MIB_TCPROW_OWNER_PID*)&ptable[1];
UInt32 j = 0;
for (int i = 0; i < ExConns.dwNumEntries; i++)
{
if (!IP.specialIP(row[i].dwLocalAddr) && !IP.specialIP(row[i].dwRemoteAddr))
ExConns.table[j++] = row[i];
}
ExConns.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;
}
