windows下对socket的send和recv的超时设置，并附一个简洁明了的socket简单demo

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设置方法

int nNetTimeout=10000;//10秒，
//设置发送超时
setsockopt(m_socket,SOL_SOCKET,SO_SNDTIMEO,(char *)&nNetTimeout,sizeof(int));
//设置接收超时
setsockopt(m_socket,SOL_SOCKET,SO_RCVTIMEO,(char *)&nNetTimeout,sizeof(int));

服务

 #include <stdio.h>

 #include <winsock2.h>  

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

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

 {

     //初始化WSA

     WORD sockVersion = MAKEWORD(, );

     WSADATA wsaData;

     if (WSAStartup(sockVersion, &wsaData) != )

     {

         return ;

     }

     //创建套接字

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

     if (slisten == INVALID_SOCKET)

     {

         printf("socket error !");

         return ;

     }

     //绑定IP和端口

     sockaddr_in sin;

     sin.sin_family = AF_INET;

     sin.sin_port = htons();

     sin.sin_addr.S_un.S_addr = INADDR_ANY;

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

     {

         printf("bind error !");

     }

     //开始监听

     if (listen(slisten, ) == SOCKET_ERROR)

     {

         printf("listen error !");

         return ;

     }

     //循环接收数据

     SOCKET sClient;

     sockaddr_in remoteAddr;

     int nAddrlen = sizeof(remoteAddr);

     char revData[];

     while (true)

     {

         printf("等待连接...\n");

         sClient = accept(slisten, (SOCKADDR *)&remoteAddr, &nAddrlen);

         if (sClient == INVALID_SOCKET)

         {

             printf("accept error !");

             continue;

         }

         //接收数据

         int ret = recv(sClient, revData, , );

         if (ret > )

         {

             revData[ret] = 0x00;

             printf(revData);

         }

         //发送数据

         const char * sendData = "你好，TCP客户端！\n";

         send(sClient, sendData, strlen(sendData), );

     }

     closesocket(sClient);

     closesocket(slisten);

     WSACleanup();

     return ;

 }

客户端

#include <winsock2.h>

#include <WS2tcpip.h>

#include<stdio.h>

#include<iostream>

#include<cstring>

using namespace std;

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

int main()

{

    WORD sockVersion = MAKEWORD(, );

    WSADATA data;

    if (WSAStartup(sockVersion, &data) != )

    {

        return ;

    }

    sockaddr_in serAddr;

    serAddr.sin_family = AF_INET;

    serAddr.sin_port = htons();

    inet_pton(AF_INET, "127.0.0.1", &serAddr.sin_addr);

    while (true)

    {

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

        if (sclient == INVALID_SOCKET)

        {

            printf("invalid socket!");

            return ;

        }

        if (connect(sclient, (sockaddr *)&serAddr, sizeof(serAddr)) == SOCKET_ERROR)

        {  //连接失败

            printf("connect error !");

            closesocket(sclient);

            return ;

        }

        send(sclient, "asd", strlen("asd"), );

        char recData[];

        int ret = recv(sclient, recData, , );

        if (ret > ) {

            recData[ret] = 0x00;

            printf(recData);

        }

        closesocket(sclient);

    }

    WSACleanup();

    return ;

}