1

我使用网络平台来验证我的用户是否允许使用应用程序，但如果可能的话，我有一些错误请求帮助我，谢谢你的帮助，我的错误是：

2013-07-04 15:06:14 - NPMessage：调试：调度 RPCAuthenticateValidateTicketMessage 2013-07-04 15:06:14 - NPMessage：错误：System.ArgumentOutOfRangeException：索引超出范围。必须是非负数且小于集合的大小。参数名称：startIndex at System.BitConverter.ToUInt64(Byte[] value, Int32 startIndex) at NPx.RPCAuthenticateValidateTicketMessage.ReadTicket(Byte[] bytes) at NPx.RPCAuthenticateValidateTicketMessage.Process(NPHandler client) at NPx.NPMessage.Process()

我的来源是：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading;

using NPx;

namespace NPx
{
 public partial class RPCAuthenticateValidateTicketMessage : NPRPCMessage<AuthenticateValidateTicketMessage>
 {
     public override void Process(NPHandler client)
     {
         var ipNum = (uint)IPAddress.NetworkToHostOrder(Message.clientIP);
         var ip = new IPAddress(BitConverter.GetBytes(ipNum));
         var ticket = ReadTicket(Message.ticket);
         var npid = Message.npid;

         if (npid == 0)
         {
             npid = ticket.clientID;
         }

         var valid = false;
         var groupID = 0;

         if (ticket.version == 1)
         {
             if (client.NPID == (long)ticket.serverID)
             {
                 if (npid == ticket.clientID)
                 {
                     var remoteClient = NPSocket.GetClient((long)ticket.clientID);
                     remoteClient.CurrentServer = client.NPID;

                     if (remoteClient != null && !remoteClient.Unclean)
                     {
                         Log.Debug("Ticket auth: remote address " + remoteClient.Address.Address.ToString());
                         Log.Debug("Ticket auth: message address " + ip.ToString());

                         if (ipNum == 0 || remoteClient.Address.Address.Equals(ip))
                         {
                             valid = true;

                             groupID = remoteClient.GroupID;

                             Log.Debug("Successfully authenticated a ticket for client " + remoteClient.NPID.ToString("x16"));
                         }
                         else
                         {
                             Log.Debug("Ticket auth: IP address didn't match.");
                         }
                     }
                     else
                     {
                         Log.Debug("Ticket auth: no such client");
                     }
                 }
                 else
                 {
                     Log.Debug("Ticket auth: NPID didn't match.");
                 }
             }
             else
             {
                 Log.Debug("Ticket auth: server NPID didn't match.");
             }
         }
         else
         {
             Log.Debug("Ticket auth: version didn't match.");
         }

         var reply = MakeResponse<AuthenticateValidateTicketResultMessage>(client);
         reply.Message.result = (valid) ? 0 : 1;
         reply.Message.groupID = groupID;
         reply.Message.npid = npid;
         reply.Send();
     }

     private class NPTicket
     {
         public int version;
         public ulong clientID;
         public ulong serverID;
         public uint time;
     }

     private NPTicket ReadTicket(byte[] bytes)
     {
         var ticket = new NPTicket();
         ticket.version = BitConverter.ToInt32(bytes, 0);

         if (ticket.version == 1)
         {
             ticket.clientID = BitConverter.ToUInt64(bytes, 4);
             ticket.serverID = BitConverter.ToUInt64(bytes, 12);
             ticket.time = BitConverter.ToUInt32(bytes, 20);
         }

         return ticket;
     }
 }
....   
}
4

3 回答 3

4

在访问其位置 0、4、12 和 20 之前，检查bytesinside的大小。private NPTicket ReadTicket(byte[] bytes)

于 2013-07-04T10:55:15.237 回答
0

byte[] bytes长度可能小于您期望的索引 (0,4,12,20 )

例如 ：

打电话时

BitConverter.ToUInt64(bytes, 12);

此函数从指定索引（第二个参数）开始遍历数组bytes，并期望从字节 [12] 开始的 8 个字节，以便将它们转换为 int64。（ToInt32 需要 4 个字节）

所以你有2个案例：

==>案例1：

的长度bytes可能小于 13，这意味着 bytes[12] 无效，因此会抛出异常：Index was out of range

在调用索引之前尝试检查字节 [] 的长度

==>案例2：

从指定索引开始，数组中没有足够的字节数。示例：如果您的数组长度为 15bytes ..调用时会抛出异常，因为该函数将占用 bytes[12]、bytes[13]、bytes[14]、bytes[15]（哎呀，你的问题）。 .直到字节[19]。BitConverter.ToUInt64(bytes, 12);

于 2013-07-04T11:11:50.040 回答
0

为了进一步说明 Siraj 的观点，您可以将 BitConverter 调用包装在 try...catch 中

        int machineUint = 0; 
        try
        {
            machineUint = BitConverter.ToUInt16(bytes, 12);
        }
        catch (IndexOutOfRangeException indexer)
        {
           machineUint = 0;
        }
        catch (Exception ex)
        {
           machineUint = 0;
        }

并且出错时将产生 0，因为 index is out of range 异常和一般异常情况的输出。

于 2014-07-04T16:25:26.567 回答