winsock i/o的select模型的学习测试

王朝system·作者佚名  2006-02-01
窄屏简体版  字體: |||超大  

#include<winsock2.h>

#include<stdio.h>

#include<windows.h>

#pragma comment(lib,"WS2_32.lib")

BOOL InsertSock(SOCKET* pSock, SOCKET sock)

{

for (int nIndex = 0; nIndex < FD_SETSIZE - 1; nIndex++)

{

if (pSock[nIndex] == INVALID_SOCKET)

{

pSock[nIndex] = sock;

break;

}

}

if (nIndex == FD_SETSIZE - 1)

return FALSE;

return TRUE;

}

int main(int argc, char* argv[])

{

WSADATA wsaData;

WORD sockVersion=MAKEWORD(2,0);

WSAStartup(sockVersion,&wsaData);

SOCKET clientsockarray[FD_SETSIZE - 1];

SOCKET s=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);

if(s==INVALID_SOCKET)

{

printf(" Failed socket()\n");

WSACleanup();

return 0;

}

sockaddr_in sin;

sin.sin_family=AF_INET;

sin.sin_port=htons(8888);

sin.sin_addr.S_un.S_addr=INADDR_ANY;

if(bind(s,(LPSOCKADDR)&sin,sizeof(sin))==SOCKET_ERROR)

{

printf(" Failed bind() %d\n",GetLastError());

WSACleanup();

return 0;

}

if(listen(s,63)==SOCKET_ERROR)

{

printf(" Failed listen()\n");

WSACleanup();

return 0;

}

for (int i=0;i < 64; i++)

{

clientsockarray[i] = INVALID_SOCKET;

}

sockaddr_in remoteAddr;

int nAddrLen=sizeof(remoteAddr);

//char szText[]="Hello World!";

FD_SET fd;

FD_ZERO(&fd);

TIMEVAL tv={30,0};

FD_SET(s,&fd);

printf("server start:%d\n",GetLastError());

int num=0;

while(TRUE)

{

int nResult;

nResult = select(0,&fd, NULL,NULL,&tv);

if (nResult == SOCKET_ERROR)

{

printf("select failed \n");

continue;

}

/*

if (nResult > 0)

{

printf("dddddddddd\n");

}

*/

if(FD_ISSET(s,&fd))

{

SOCKET client;

client=accept(s,(SOCKADDR*)&remoteAddr,&nAddrLen);

if (client == INVALID_SOCKET)

{

printf("client connect fail %d",GetLastError());

continue;

}

if(!InsertSock(clientsockarray,client))

{

printf("³¬¹ý×î´óSOCKET\n");

closesocket(client);

continue;

}

FD_SET(client,&fd);

}

// Öð¸ö´¦Àí´¦ÓÚ´ý¾ö״̬µÄÌ×½Ó×Ö

nResult = select(0,&fd, NULL,NULL,&tv);

if (nResult == SOCKET_ERROR)

{

printf("select failed \n");

continue;

}

for (int nIndex = 0; nIndex <= FD_SETSIZE - 1; nIndex++)

{

if(FD_ISSET(clientsockarray[nIndex], &fd))

{

//printf("aaaa\n");

char buffer[256];

int nRet = recv(clientsockarray[nIndex], buffer, sizeof(buffer), 0);

if (nRet == 0 || nRet == SOCKET_ERROR)

{

closesocket(clientsockarray[nIndex]);

clientsockarray[nIndex] = INVALID_SOCKET;

continue; // ¼ÌÐø´¦ÀíÌ×½Ó×Ö¾ä±úÊý×éÖÐµÄÆäËüÌ×½Ó×Ö

}

// ½«½ÓÊܵ½µÄÊý¾Ý½øÐд¦Àí,´Ë´¦Ö»½«ÆäÊä³ö

//char buffer[256];

//recv(clientsockarry[nIndex],buffer,256);

printf("has recv data from socket %d : %s",i, buffer);

printf(" num:%d\n",++num);

}

}

}

closesocket(s);

WSACleanup();

return 0;

}

 
 
 
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