WSAEventSelect模型下何时触发FD_CLOSE

2014-11-28 05:40:04 498 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

Windows socket之WSAEventSelect模型_wsaeventselect模型的socket编程和客户端应用的功能(1) 在while循环内，循环调用WSAWaitForMultipleEvents函数等待网络事件的发生，当网络事件发生时函数返回，并通过该函数的返回值得到发生网络事件的套接字。3：如果要取消事件对象与网络事件的关联，以及为套接字注册的网络事件。这些标识符的命名规则是对应的网络事件后面添加_BIT.例如，对于FD_READ事件的网络事件错误标识符为FD_READ_BIT。如果发生FD_CLOSE网络事件，将该套接字从套接字数组清除，同时将对应事件从事件数组删除。事件对象数量减一，并关闭该套接字。阅读详情

最近在学习网络编程中的WSAEventSelect模型，其他都还好，就是无法触发FD_CLOSE事件，导致服务器端的连接无法关闭。
请教各位高手指教。
直接上代码：

#include <iostream>

#include "InitSocket.h"



#pragma comment (lib,"ws2_32.lib")



//初始化网络环境

CInitSocket gcInitSocket;



void main()

{

	 SOCKET sServer = socket(AF_INET,SOCK_STREAM,0);

	 if (INVALID_SOCKET == sServer)

	 {

		 printf("创建服务器套接字失败，错误编号：%d\n",WSAGetLastError());

		 exit(0);

	 }

	 sockaddr_in addrBind;

	 addrBind.sin_family = AF_INET;

	 addrBind.sin_addr.S_un.S_addr = htonl(ADDR_ANY);

	 addrBind.sin_port = htons(8080);

	 int iBind = bind(sServer,(sockaddr*)&addrBind,sizeof(sockaddr));

	 if (SOCKET_ERROR == iBind)

	 {

		 printf("bind failed\n");

		 exit(0);

	 }

	 int iListen = listen(sServer,SOMAXCONN);

	 if (SOCKET_ERROR == iListen)

	 {

		 printf("listen failed\n");

		 exit(0);

	 }

	 WSAEVENT eventArr[WSA_MAXIMUM_WAIT_EVENTS];

	 SOCKET socketArr[WSA_MAXIMUM_WAIT_EVENTS];

	 int iArrSize = 0;

	 WSAEVENT eventForSRV = WSACreateEvent();

	 eventArr[iArrSize] = eventForSRV;

	 socketArr[iArrSize] = sServer;

	 ++iArrSize;

	 if (WSA_INVALID_EVENT == eventForSRV)

	 {

		 printf("create wsaevent failed\n");

		 exit(0);

	 }

	 WSAEventSelect(sServer,eventForSRV,FD_ACCEPT | FD_CLOSE);

	 while (1)

	 {

		 int iIndex = WSAWaitForMultipleEvents(iArrSize,eventArr,false,INFINITE,false);

		 if (WSA_WAIT_FAILED == iIndex || WSA_WAIT_TIMEOUT == iIndex)

		 {

			 continue;

		 }

		 iIndex -= WSA_WAIT_EVENT_0;

		 for (int i = iIndex;i!=iArrSize;++i)

		 {

			 iIndex = WSAWaitForMultipleEvents(1,&eventArr[i],true,1000,false);

			 if (WSA_WAIT_FAILED == iIndex || WSA_WAIT_TIMEOUT == iIndex)

			 {

				 continue;

			 }

			 else

			 {

				 WSANETWORKEVENTS eventTmp;

				 WSAEnumNetworkEvents(socketArr[i],eventArr[i],&eventTmp);

				 if (eventTmp.lNetworkEvents & FD_ACCEPT)

				 {

					 if (eventTmp.iErrorCode[FD_ACCEPT_BIT] != 0)

					 {

						 continue;

					 }

					 sockaddr_in addrAccept;

					 int iLength = sizeof(sockaddr);

					 SOCKET sAccept = accept(socketArr[i],(sockaddr*)&addrAccept,&iLength);

					 WSAEVENT eventAccept = WSACreateEvent();

					 printf("IP：%s，端口：%d\n",inet_ntoa(addrAccept.sin_addr),ntohs(addrAccept.sin_port)); 

					 WSAEventSelect(sAccept,eventAccept,FD_READ || FD_WRITE || FD_CLOSE);

					 socketArr[iArrSize] = sAccept;

					 eventArr[iArrSize] = eventAccept;

					 ++iArrSize;

				 }

				 else if (eventTmp.lNetworkEvents & FD_READ)

				 {

					 if (0 != eventTmp.iErrorCode[FD_READ_BIT])

					 {

						 continue;

					 }

					 char chRecv[200] = {0};

					 int iRecv = recv(socketArr[i],chRecv,200,0);

					 if (SOCKET_ERROR == iRecv)

					 {

						 printf("recv failed\n");

						 continue;

					 }

					 printf("%s\n",chRecv);

				 }

				 else if (eventTmp.lNetworkEvents & FD_CLOSE)

				 {

// 					 if (0 != eventTmp.iErrorCode[FD_CLOSE_BIT])

// 					 {

// 						 continue;

// 					 }

					 closesocket(socketArr[i]);

					 for (int i2 = i;i2!=iArrSize - 1;++i2)

					 {

						 socketArr[i] = socketArr[i + 1];

						 eventArr[i] = eventArr[i + 1];

					 }

					 --iArrSize;

					 printf("one client closed\n");

				 }

			 }

		 }

	 }

}