沾包处理的一种处理方法

//读取TCP数据线程
DWORD WINAPI ReadTCPDataThread(LPVOID lPvoid)
{
 CSock5Client *pSock5Client = (CSock5Client *)lPvoid; 
 char   pcBuf[MAX_SEND_BUF];
 int    nPreLen = MAX_SEND_BUF;
 int             nSize   = sizeof(COMMDATA<int>);
 while(!pSock5Client->m_bExitThread)
 {
  int nRecvNum = 0, nRecvD = 0;
  COMMDATA<int>* pCommand = (COMMDATA<int>*)pcBuf;
  memset(pcBuf, 0, MAX_SEND_BUF);
    
  int nfirstLen = nSize;
  int nfirstCount = 0;
  int nfirstRecvLen = nfirstLen;
  while(nfirstCount != nfirstLen)
  {
   nRecvD = recv(pSock5Client->m_socketTcp,pcBuf +nfirstCount,nfirstRecvLen,0);
   nfirstCount += nRecvD;
   nfirstRecvLen -= nRecvD;
  }

//  nRecvD   = recv(pSock5Client->m_socketTcp,pcBuf,nSize,0);
  //主动退出和被动退出俩种，主动退出时要判断
  //接收错误再接3次, 在电脑网线拔掉时再接上时会起做用

  if(nfirstCount == SOCKET_ERROR && !pSock5Client->m_bExitThread)
  {
   nfirstCount   = recv(pSock5Client->m_socketTcp,pcBuf,nSize,0);
   
   if(nfirstCount == SOCKET_ERROR &&  !pSock5Client->m_bExitThread)
   {
     nfirstCount   = recv(pSock5Client->m_socketTcp,pcBuf,nSize,0);
     if(nfirstCount == SOCKET_ERROR &&  !pSock5Client->m_bExitThread)
     {
       nfirstCount   = recv(pSock5Client->m_socketTcp,pcBuf,nSize,0);
       if(nfirstCount == SOCKET_ERROR &&  !pSock5Client->m_bExitThread)
       {
         pSock5Client->UnInitClient();
         pSock5Client->InitSock();
         m_gErrorLog.AddLog(1, "recv data error");
         break;
       }
     }
   }

  }   
  if(nfirstCount != SOCKET_ERROR && nfirstCount>0)
  {
   if(pCommand->header.version == 0x201)
   {
    int nLen = pCommand->header.size -nSize;
    int nCount = 0,nRecvS;
    int nRecvLen = nLen;
    while(nCount != nLen)
    {
     nRecvS = recv(pSock5Client->m_socketTcp,pcBuf +nSize+nCount,nRecvLen,0);
     nCount += nRecvS;
     nRecvLen -= nRecvS;
    }

    if(nRecvS != SOCKET_ERROR && nCount+nSize>0)
    {
     pSock5Client->m_pInMessageQueue->AddMessage(pcBuf,nCount+nSize);
     //TRACE("接收到消息/n");
    }
    else
    {
     if(nRecvNum == SOCKET_ERROR)
     {
      pSock5Client->UnInitClient();
      pSock5Client->InitSock();
      m_gErrorLog.AddLog(1, "recv data error");
      break;
     }
     Sleep(1);
    }
   }
   else
   {
    //概率非常小
    //需要退出并自己重新启动连接服务器
    pSock5Client->UnInitClient();
    pSock5Client->InitSock();
    m_gErrorLog.AddLog(1, "recv data error");
    break;
   }
  }
 }
 return 0;
}