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

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(2, 2);
    WSADATA wsaData;
    if (WSAStartup(sockVersion, &wsaData) != 0)
    {
        return 0;
    }
    //创建套接字  
    SOCKET slisten = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
    if (slisten == INVALID_SOCKET)
    {
        printf("socket error !");
        return 0;
    }
    //绑定IP和端口  
    sockaddr_in sin;
    sin.sin_family = AF_INET;
    sin.sin_port = htons(8888);
    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, 5) == SOCKET_ERROR)
    {
        printf("listen error !");
        return 0;
    }
    //循环接收数据  
    SOCKET sClient;
    sockaddr_in remoteAddr;
    int nAddrlen = sizeof(remoteAddr);
    char revData[1024];
    while (true)
    {
        printf("等待连接...
");
        sClient = accept(slisten, (SOCKADDR *)&remoteAddr, &nAddrlen);
        if (sClient == INVALID_SOCKET)
        {
            printf("accept error !");
            continue;
        }
        //接收数据  
        int ret = recv(sClient, revData, 255, 0);
        if (ret > 0)
        {
            revData[ret] = 0x00;
            printf(revData);
        }
        //发送数据  
        const char * sendData = "你好，TCP客户端！
";
        send(sClient, sendData, strlen(sendData), 0);
    }
    closesocket(sClient);
    closesocket(slisten);
    WSACleanup();
    return 0;
}

 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(2, 2);
    WSADATA data;
    if (WSAStartup(sockVersion, &data) != 0)
    {
        return 0;
    }
    sockaddr_in serAddr;
    serAddr.sin_family = AF_INET;
    serAddr.sin_port = htons(8888);
    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 0;
        }
        if (connect(sclient, (sockaddr *)&serAddr, sizeof(serAddr)) == SOCKET_ERROR)
        {  //连接失败 
            printf("connect error !");
            closesocket(sclient);
            return 0;
        }
        send(sclient, "asd", strlen("asd"), 0);
        char recData[255];
        int ret = recv(sclient, recData, 255, 0);
        if (ret > 0) {
            recData[ret] = 0x00;
            printf(recData);
        }
        closesocket(sclient);
    }
    WSACleanup();
    return 0;
}

原文:https://blog.csdn.net/weixinhum/article/details/81742248