多线程实现NTP服务器
多线程实现NTP服务器
服务器端：server.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <time.h>
#include <unistd.h>
#include <pthread.h>
#include "proto.h"
#define IPSIZE 40
static void *func(void *fd) //子线程函数
{
int lfd = *(int *)fd;
FILE *fp = fdopen(lfd,"r+");
fprintf(fp,FMT,(long long)time(NULL)); //获取时间戳发送给客户端
sleep(20); //测试
fclose(fp);
pthread_exit(NULL); //线程退出
}
int main()
{
int ret;
int lfd,newfd;
struct sockaddr_in laddr,raddr;
socklen_t lenth;
char ip[IPSIZE];
pthread_t tid;
lfd = socket(AF_INET,SOCK_STREAM,0); //创建socket
if(lfd <0)
{
perror("socket()");
exit(1);
}
int val =1;
ret = setsockopt(lfd,SOL_SOCKET,SO_REUSEPORT,&val,sizeof(val)); //设置端口复用
if(ret <0)
{
perror("setsockopt()");
exit(1);
}
laddr.sin_family = AF_INET; //初始化结构体
laddr.sin_port = htons(atoi(PORT));
inet_pton(AF_INET,"0.0.0.0",&laddr.sin_addr.s_addr);
ret = bind(lfd,(void *)&laddr,sizeof(laddr)); //绑定端口和IP
if(ret<0)
{
perror("bind()");
exit(1);
}
ret = listen(lfd,200); //监听最大200个
if(ret <0)
{
perror("listen()");
exit(1);
}
lenth = sizeof(raddr);
while(1)
{
newfd = accept(lfd,(void *)&raddr,&lenth); //等待客户端接入
if(newfd<0)
{
perror("accpt()");
break;
}
inet_ntop(AF_INET,&raddr.sin_addr.s_addr,ip,IPSIZE);
printf("-----IP:%s PORT:%d-----\n",ip,ntohs(raddr.sin_port)); //输出客户端信息
pthread_create(&tid,NULL,func,&newfd); //创建线程
pthread_detach(tid); //线程分离
}
close(lfd);
exit(0);
}
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