Windows tcp客户端程序 设置非阻塞

Windows tcp client 非阻塞

// tcpclienttest.cpp : 定义控制台应用程序的入口点。

//

#include "stdafx.h"

//TCP client

//client send string to server

//Visual C++ 6.0

#include <windows.h>

#include <stdio.h>

//#include <winsock2.h>

//tcp头文件

#include <cstdlib>

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

int _tmain(int argc, _TCHAR* argv[])

{

SOCKET soc;

SOCKADDR_IN serveraddr;

SOCKADDR_IN clientaddr;

int flags;

char buf[1024];

memset(buf,0,sizeof(buf));

//strcpy_s(buf,"testtest123");

WSADATA wsa;

WSAStartup(MAKEWORD(1,1),&wsa); //initial Ws2_32.dll by a process

if((soc = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) <= 0) //create a tcp socket

{

printf("Create socket fail!\n");

return -1;

}

//printf("set socket:%d",ret);

serveraddr.sin_family = AF_INET;

serveraddr.sin_port = htons(9159);

serveraddr.sin_addr.S_un.S_addr = inet_addr("192.168.100.22");

//connect to server

printf("Try to connect...\n");

if(connect(soc, (SOCKADDR *)&serveraddr, sizeof(serveraddr)) != 0)

{

printf("Connect fail!\n");

getchar();

return -1;

}

//设置非阻塞

unsigned long ul=1;

int ret=ioctlsocket(soc,FIONBIO,(unsigned long *)&ul);//设置成非阻塞模式。

if(ret==SOCKET_ERROR)//设置失败。

{

printf("set fail\n");

}

printf("Connected success\n");

while(1)

{

//scanf_s("%s", buf);

//strcpy_s(buf,"123");

//send to server

//if(send(soc, buf, strlen(buf)+1, 0)<=0)

//{

// printf("Error!\n");

//}

if (recv(soc, buf, 1024, 0)<=0)

{

printf("RevFail\n");

}

printf("%s len:%d\n",buf,strlen(buf));

memset(buf,0,sizeof(buf));

//Sleep(1000);

Sleep(1000);

}

WSACleanup(); //clean up Ws2_32.dll

return 0;

} 

附件为网络测试程序；可作为tcp客户端服务端，及udp服务器客户端。可以与之建立连接通信