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WINCE上實(shí)現(xiàn)UDP通信(100%可行?。?

來(lái)源:網(wǎng)絡(luò)

點(diǎn)擊:2028

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所屬頻道:新聞中心

關(guān)鍵詞: WINCE,UDP通信

      首先介紹一下,開發(fā)平臺(tái):WINCE 4.2 (WINCE 5.0也適用,因?yàn)槭褂昧遂o態(tài)編譯MFC動(dòng)態(tài)鏈接庫(kù));開發(fā)工具:VS2005。

      接下來(lái)開始修改代碼:

      view plaincopy to clipboardprint?

      1.修改UDP_CE.CPP的SendData函數(shù)為:

      bool CUDP_CE::SendData(const char *buf, int len)

      {

      int nBytes = 0;

      int nErrorCode;

      nBytes = sendto(m_UDPSocket,buf,len,0,(sockaddr*)&m_RemoteAddr,sizeof(m_RemoteAddr));

      if (nBytes==SOCKET_ERROR )

      {

      nErrorCode = WSAGetLastError();

      m_OnUdpError(m_pOwnerWnd,nErrorCode);

      return false;

      }

      return true;

      }

      當(dāng)然,不要忘記修改UDP_CE.h的SendData函數(shù)聲明為:bool SendData(const char *buf, int len);

      2.修改UDP_CE.CPP的RecvThread函數(shù)為:

      。..。..。..。..。..

      if (ret 》 0)

      {

      if (FD_ISSET(pSocket-》m_UDPSocket,&fdRead))

      {

      tmpAddr.sin_family=AF_INET;

      tmpAddr.sin_port = htons(pSocket-》m_RemoteAddr.sin_port);

      tmpAddr.sin_addr.s_addr =INADDR_ANY;

      tmpRecvLen = sizeof(tmpAddr);

      recvBuf = new char[1024];

      recvedBuf = new char[1024];

      ZeroMemory(recvBuf,1024);

      ZeroMemory(recvedBuf,1024);

      recvLen = recvfrom(pSocket-》m_UDPSocket,recvBuf, 1024,0,(SOCKADDR*)&tmpAddr,&tmpRecvLen);

      if (recvLen == SOCKET_ERROR)

      {

      iErrorCode = WSAGetLastError();

      pSocket-》m_OnUdpError(pSocket-》m_pOwnerWnd,iErrorCode);

      break;

      }

      else if (recvLen == 0)

      {

      iErrorCode = WSAGetLastError();

      pSocket-》m_OnUdpError(pSocket-》m_pOwnerWnd,iErrorCode);

      break;

      }

      else

      {

      //此處添加解析程序,將接收到的數(shù)據(jù)解析后,

      pSocket-》m_OnUdpRecv(pSocket-》m_pOwnerWnd,recvBuf,recvedBufLen,(SOCKADDR*)&tmpAddr);

      delete []recvBuf;

      recvBuf = NULL;

      delete []recvedBuf;

      recvedBuf = NULL;

      }

      }

      3.修改UDPDlg.cpp.CPP的OnUdpCERecv函數(shù)為:

      CUDPDlg * pDlg;

      pDlg = (CUDPDlg*)pWnd;

      CEdit *pRecvStrEdit = (CEdit*)pDlg-》GetDlgItem(IDC_EDIT_RECVSTR);

      ASSERT(pRecvStrEdit != NULL);

      CString strRecv (buf);

      pRecvStrEdit-》SetWindowText(strRecv);

      4.刪除UDP_CE.H,不是必須,但可以節(jié)省多余的代碼

      typedef struct CUDPData

      {

      char FrameHead[4]; //幀頭

      DWORD DataPackageLen; //幀長(zhǎng)度

      char * Buf; //緩沖區(qū)數(shù)據(jù)

      char FrameTail[4]; //幀尾

      }UDPData;

      1.修改UDP_CE.CPP的SendData函數(shù)為:

      bool CUDP_CE::SendData(const char *buf, int len)

      {

      int nBytes = 0;

      int nErrorCode;

      nBytes = sendto(m_UDPSocket,buf,len,0,(sockaddr*)&m_RemoteAddr,sizeof(m_RemoteAddr));

      if (nBytes==SOCKET_ERROR )

      {

      nErrorCode = WSAGetLastError();

      m_OnUdpError(m_pOwnerWnd,nErrorCode);

      return false;

      }

      return true;

      }

      當(dāng)然,不要忘記修改UDP_CE.h的SendData函數(shù)聲明為:bool SendData(const char *buf, int len);

      2.修改UDP_CE.CPP的RecvThread函數(shù)為:

      。..。..。..。..。..

      if (ret 》 0)

      {

      if (FD_ISSET(pSocket-》m_UDPSocket,&fdRead))

      {

      tmpAddr.sin_family=AF_INET;

      tmpAddr.sin_port = htons(pSocket-》m_RemoteAddr.sin_port);

      tmpAddr.sin_addr.s_addr =INADDR_ANY;

      tmpRecvLen = sizeof(tmpAddr);

      recvBuf = new char[1024];

      recvedBuf = new char[1024];

      ZeroMemory(recvBuf,1024);

      ZeroMemory(recvedBuf,1024);

      recvLen = recvfrom(pSocket-》m_UDPSocket,recvBuf, 1024,0,(SOCKADDR*)&tmpAddr,&tmpRecvLen);

      if (recvLen == SOCKET_ERROR)

      {

      iErrorCode = WSAGetLastError();

      pSocket-》m_OnUdpError(pSocket-》m_pOwnerWnd,iErrorCode);

      break;

      }

      else if (recvLen == 0)

      {

      iErrorCode = WSAGetLastError();

      pSocket-》m_OnUdpError(pSocket-》m_pOwnerWnd,iErrorCode);

      break;

      }

      else

      {

      //此處添加解析程序,將接收到的數(shù)據(jù)解析后,

      pSocket-》m_OnUdpRecv(pSocket-》m_pOwnerWnd,recvBuf,recvedBufLen,(SOCKADDR*)&tmpAddr);

      delete []recvBuf;

      recvBuf = NULL;

      delete []recvedBuf;

      recvedBuf = NULL;

      }

      }

      3.修改UDPDlg.cpp.CPP的OnUdpCERecv函數(shù)為:

      CUDPDlg * pDlg;

      pDlg = (CUDPDlg*)pWnd;

      CEdit *pRecvStrEdit = (CEdit*)pDlg-》GetDlgItem(IDC_EDIT_RECVSTR);

      ASSERT(pRecvStrEdit != NULL);

      CString strRecv (buf);

      pRecvStrEdit-》SetWindowText(strRecv);

      4.刪除UDP_CE.H,不是必須,但可以節(jié)省多余的代碼

      typedef struct CUDPData

      {

      char FrameHead[4]; //幀頭

      DWORD DataPackageLen; //幀長(zhǎng)度

      char * Buf; //緩沖區(qū)數(shù)據(jù)

      char FrameTail[4]; //幀尾

      }UDPData;還可以刪除窗體上發(fā)送、接收數(shù)字的編輯框等,因?yàn)閷?shí)際應(yīng)用中用不上。

    (審核編輯: 智匯小新)