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(, );
     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 ;
}

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