Beispiel #1
0
        internal static Owner GetOwningModuleUDP(MIB_UDPROW_OWNER_MODULE row)
        {
            Owner ret = null;
            //if (ownerCache.TryGetValue(row, out ret))
            //{
            //    return ret;
            //}

            IntPtr buffer = IntPtr.Zero;

            try
            {
                uint buffSize = 0;
                var  retn     = GetOwnerModuleFromUdpEntry(ref row, TCPIP_OWNER_MODULE_INFO_CLASS.TCPIP_OWNER_MODULE_INFO_BASIC, IntPtr.Zero, ref buffSize);
                if ((retn != NO_ERROR) && (retn != ERROR_INSUFFICIENT_BUFFER))
                {
                    //Cannot get owning module for this connection
                    LogHelper.Info("Unable to get the connection owner.");
                    return(ret);
                }
                if (buffSize == 0)
                {
                    //No buffer? Probably means we can't retrieve any information about this connection; skip it
                    LogHelper.Info("Unable to get the connection owner.");
                    return(ret);
                }
                buffer = Marshal.AllocHGlobal((int)buffSize);

                //GetOwnerModuleFromUdpEntry might want the fields of TCPIP_OWNER_MODULE_INFO_BASIC to be NULL
                ZeroMemory(buffer, buffSize);

                var resp = GetOwnerModuleFromUdpEntry(ref row, TCPIP_OWNER_MODULE_INFO_CLASS.TCPIP_OWNER_MODULE_INFO_BASIC, buffer, ref buffSize);
                if (resp == 0)
                {
                    ret = new Owner((TCPIP_OWNER_MODULE_BASIC_INFO)Marshal.PtrToStructure(buffer, typeof(TCPIP_OWNER_MODULE_BASIC_INFO)));
                }
                else if (resp != ERROR_NOT_FOUND) // Ignore closed connections
                {
                    LogHelper.Error("Unable to get the connection owner.", new Win32Exception((int)resp));
                }

                //ownerCache.Add(row, ret);

                return(ret);
            }
            finally
            {
                if (buffer != IntPtr.Zero)
                {
                    Marshal.FreeHGlobal(buffer);
                }
            }
        }
Beispiel #2
0
 public static extern uint GetOwnerModuleFromUdpEntry(ref MIB_UDPROW_OWNER_MODULE pUdpEntry, TCPIP_OWNER_MODULE_INFO_CLASS Class, IntPtr Buffer, ref uint pdwSize);