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SmartWSA.cpp
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Upload User: liuzhunlcd
Upload Date: 2007-01-12
Package Size: 54k
Code Size: 2k
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Email Client

Development Platform:

Visual C++

SmartWSA.cpp：Code Content
  1. // SmartWSA.cpp: implementation of the CSmartWSA class.
  2. //
  3. //////////////////////////////////////////////////////////////////////
  5. #include "stdafx.h"
  6. #include <wtypes.h>
  7. #include <iostream.h>
  9. #include "SmartWSA.h"
  11. //////////////////////////////////////////////////////////////////////
  12. // Construction/Destruction
  13. //////////////////////////////////////////////////////////////////////
  14. //FD_SETSIZE=128
  15. CSmartWSA::CSmartWSA()
  16. {
  17. m_blIsInitialized = false;
  18. Startup();
  19. }
  21. CSmartWSA::~CSmartWSA()
  22. {
  23. Cleanup();
  24. }
  27. //-------------------------------------------------------------------
  28. // Startup()
  29. //-------------------------------------------------------------------
  30. bool CSmartWSA::Startup()
  31. {
  32. WORD wVersionRequested;
  33. WSADATA wsaData;
  34. INT iErr = 0;
  36. if(IsInitialized())
  37. return true;
  39. wVersionRequested = MAKEWORD(SMARTWSA_VERSION_HI, SMARTWSA_VERSION_LOW);
  41. iErr = WSAStartup(wVersionRequested, &wsaData);
  42. if(iErr != 0) 
  43. {
  44. // Tell the user that we could not find a usable WinSock DLL
  45. //g_cLog << "WSAStartup() failed with code " << iErr << endl;
  46. return false;
  47. }
  48. // Confirm that the WinSock DLL supports 2.2.
  49. // Note that if the DLL supports versions greater  
  50. // than 2.2 in addition to 2.2, it will still return 
  51. // 2.2 in wVersion since that is the version we requested
  52. if(LOBYTE(wsaData.wVersion) != SMARTWSA_VERSION_LOW || HIBYTE(wsaData.wVersion) != SMARTWSA_VERSION_HI ) 
  53. {
  54. // Tell the user that we could not find a usable WinSock DLL.
  55. //g_cLog << "could not find a usable WinSock DLL, only next version may be used: " <<  LOBYTE(wsaData.wVersion) 
  56. //  << "." << HIBYTE(wsaData.wVersion) << endl;
  57. Cleanup();
  58. return false; 
  59. }
  60. // The WinSock DLL is acceptable. Proceed. 
  61. m_blIsInitialized = true;
  62. return true;
  63. }
  66. //-------------------------------------------------------------------
  67. // Cleanup()
  68. //-------------------------------------------------------------------
  69. bool CSmartWSA::Cleanup()
  70. {
  71. if(IsInitialized() == false)
  72. return true;
  74. if(WSACleanup() == SOCKET_ERROR)
  75. {
  76. INT iErr = WSAGetLastError();
  77. //g_cLog << "WSACleanup() failed with code " << iErr << endl;
  78. return false; 
  79. }
  81. m_blIsInitialized = false;
  82. return true;
  83. }
  86. //-------------------------------------------------------------------
  87. // IsInitialized()
  88. //-------------------------------------------------------------------
  89. bool CSmartWSA::IsInitialized() const
  90. {
  91. return m_blIsInitialized;
  92. }