C++自定义connect超时时间——信号处理法

最新推荐文章于 2025-05-30 11:34:33 发布

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最新推荐文章于 2025-05-30 11:34:33 发布 · 1.8k 阅读

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#C++

一代码

#include <sys/socket.h>
#include <arpa/inet.h>
#include <assert.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>
#include <fcntl.h>
#include <sys/time.h>
#include <signal.h>

#define BUFFER_SIZE 512



void u_alarm_handler(int n)
{
    printf("alarm:-----------connect timeout----------\n");
}

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

    char ip[]="192.168.0.111"; //本机的ip是192.168.0.110，192.168.0.111并不存在
    int port = 13334;

    struct sockaddr_in server_address;
    bzero( &server_address, sizeof( server_address ) );
    server_address.sin_family = AF_INET;
    inet_pton( AF_INET, ip, &server_address.sin_addr );
    server_address.sin_port = htons( port );

    int sock = socket( PF_INET, SOCK_STREAM, 0 );
    assert( sock >= 0 );



    int old_option = fcntl( sock, F_GETFL );