internal static List <ITcpConnectionInfo> GetTcp4Table()
{
int tableSize = 0;
var result = GetTcpTable2(IntPtr.Zero, ref tableSize, false);
IntPtr tcpTableRecordsPtr = IntPtr.Zero;
List <ITcpConnectionInfo> fTable = new List <ITcpConnectionInfo>();
try
{
tcpTableRecordsPtr = Marshal.AllocHGlobal(tableSize);
result = GetTcpTable2(tcpTableRecordsPtr, ref tableSize, false);
if (result != 0)
{
return(fTable);
}
var table = Marshal.PtrToStructure <MIB_TCPTABLE2>(tcpTableRecordsPtr);
IntPtr tableRowPtr = (IntPtr)((long)tcpTableRecordsPtr + Marshal.SizeOf(table.dwNumEntries));
for (int i = 0; i < table.dwNumEntries; ++i)
{
MIB_TCPROW2 tcpRow = (MIB_TCPROW2)Marshal.PtrToStructure(tableRowPtr, typeof(MIB_TCPROW2));
fTable.Add(new Tcp4ConnectionInfo(tcpRow));
tableRowPtr = (IntPtr)((long)tableRowPtr + Marshal.SizeOf(tcpRow));
}
return(fTable);
}
catch (OutOfMemoryException me)
{
LoggerProxy.Default.Error(me);
}
catch (Exception e)
{
LoggerProxy.Default.Error(e);
}
finally
{
Marshal.FreeHGlobal(tcpTableRecordsPtr);
}
return(fTable);
}
public Tcp4ConnectionInfo(MIB_TCPROW2 tcpRow)
{
// We mask the ports in this struct because according to the documentation, the upper
// bits can be populated arbitrarily, aka undefined state.
LocalPort = (ushort)(tcpRow.dwLocalPort & 0xFFFF);
RemotePort = (ushort)(tcpRow.dwRemotePort & 0xFFFF);
LocalAddress = new IPAddress(tcpRow.dwLocalAddr);
RemoteAddress = new IPAddress(tcpRow.dwRemoteAddr);
State = tcpRow.dwState;
OffloadState = tcpRow.dwOffloadState;
OwnerPid = tcpRow.dwOwningPid;
}