Beispiel #1
0
            /// <summary>
            /// 获取所有 UDP 连接对象
            /// </summary>
            /// <returns></returns>
            private static UDPRow[] GetAllUdpConnections()
            {
                UDPRow[] tTable;
                int      AF_INET  = 2; // IPv4
                int      buffSize = 0;

                GetExtendedUdpTable(IntPtr.Zero, ref buffSize, true, AF_INET, UDP_TABLE_CLASS.UDP_TABLE_OWNER_PID); // 获取 buffsize 大小
                IntPtr buffTable = Marshal.AllocHGlobal(buffSize);

                try
                {
                    uint ret = GetExtendedUdpTable(buffTable, ref buffSize, true, AF_INET, UDP_TABLE_CLASS.UDP_TABLE_OWNER_PID);
                    if (ret != 0)
                    {
                        return(null);
                    }
                    UDPTable tab    = (UDPTable)Marshal.PtrToStructure(buffTable, typeof(UDPTable));
                    IntPtr   rowPtr = (IntPtr)((long)buffTable + Marshal.SizeOf(tab.dwNumEntries));
                    tTable = new UDPRow[tab.dwNumEntries];

                    for (int i = 0; i < tab.dwNumEntries; i++)
                    {
                        UDPRow udpRow = (UDPRow)Marshal.PtrToStructure(rowPtr, typeof(UDPRow));
                        tTable[i] = udpRow;
                        rowPtr    = (IntPtr)((long)rowPtr + Marshal.SizeOf(udpRow));  // next entry
                    }
                }
                finally
                {
                    Marshal.FreeHGlobal(buffTable);
                }
                return(tTable);
            }
Beispiel #2
0
            /// <summary>
            /// 获取特定 UDP 连接对象
            /// </summary>
            /// <param name="PID">进程 PID</param>
            /// <returns></returns>
            private static List <UDPRow> GetSpecUDPConnection(int PID)
            {
                int           AF_INET  = 2; // IPv4
                int           BuffSize = 0; // 缓冲区大小
                List <UDPRow> Target   = new List <UDPRow>();

                GetExtendedUdpTable(IntPtr.Zero, ref BuffSize, true, AF_INET, UDP_TABLE_CLASS.UDP_TABLE_OWNER_PID); // 获取 BuffSize 大小
                IntPtr Buffer = Marshal.AllocHGlobal(BuffSize);                                                     // 分配内存空间

                try
                {
                    if (GetExtendedUdpTable(Buffer, ref BuffSize, true, AF_INET, UDP_TABLE_CLASS.UDP_TABLE_OWNER_PID) != 0)
                    {
                        return(null);
                    }
                    UDPTable udpTable = (UDPTable)Marshal.PtrToStructure(Buffer, typeof(UDPTable));
                    IntPtr   RowPtr   = (IntPtr)((long)Buffer + Marshal.SizeOf(udpTable.dwNumEntries));

                    for (int i = 0; i < udpTable.dwNumEntries; i++)
                    {
                        UDPRow udpRow = (UDPRow)Marshal.PtrToStructure(RowPtr, typeof(UDPRow));
                        if (udpRow.PID == PID)
                        {
                            Target.Add(udpRow);
                        }
                        RowPtr = (IntPtr)((long)RowPtr + Marshal.SizeOf(udpRow));   // next entry
                    }
                }
                finally
                {
                    Marshal.FreeHGlobal(Buffer);
                }
                return(Target);
            }