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fork_ser.c
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fork_ser.c
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/*************************************************************************
> File Name: fork_ser.c
> Author:
> Mail:
> Created Time: 2017年08月18日 星期五 10时10分21秒
************************************************************************/
#include<stdio.h>
#include<unistd.h>
#include<string.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<stdlib.h>
#include<netinet/in.h>
#include<arpa/inet.h>
int a[1024] = {-1};
int main()
{
int i = 0;
struct sockaddr_in serveraddr;
struct sockaddr_in clientaddr;//因服务器需要绑定,且需要接受,所以既需要服务器地址也需要客户端地址
char buf[1024];
int socketfd,sin_size;
serveraddr.sin_family = AF_INET;
serveraddr.sin_port = htons(4188);
//可以使其监听外部服务器发送到服务器端的所有网卡请求
serveraddr.sin_addr.s_addr = htonl(INADDR_ANY);
if((socketfd = socket(AF_INET,SOCK_STREAM,0)) < 0)
perror("socket");
printf("%d",socketfd);
if(bind(socketfd,(struct sockaddr*)&serveraddr,sizeof(serveraddr)) < 0)
perror("bind");
if(listen(socketfd,SOMAXCONN) < 0)
perror("listen");
int connfd;
pid_t pid,pid1;
socklen_t cli_len = sizeof(clientaddr);
while(1)//保证出现多个客户端
{
connfd = accept(socketfd,(struct sockaddr*)&clientaddr,&cli_len);
a[i] = connfd;
printf("%d\n",a[i]);
i++;
printf("IP = %s PORT = %d\n",inet_ntoa(clientaddr.sin_addr),ntohs(clientaddr.sin_port));
pid = fork();
if(pid == -1)
{
perror("fork");
}
else if(pid == 0)
{
close(socketfd);
pid1 = fork();
if(pid1 > 0)
{
while(1)
{
memset(buf,0,sizeof(buf));
int rec = recv(connfd,buf,sizeof(buf),0);
if(rec == -1)
{
perror("recv");
}
if(rec == 0)
{
printf("client close\n");
break;
}
printf("recv:%s\n",buf);
}
exit(0);
}
else if(pid1 == 0)
{
while(1)
{
memset(buf,0,sizeof(buf));
if(fgets(buf,sizeof(buf),stdin) != NULL)
{
if(send(a[i],buf,sizeof(buf),0) < 0)
perror("send");
}
}
exit(0);
}
else
{
perror("fork");
}
exit(EXIT_SUCCESS);
}
else
{
close(connfd);
}
if(i >= 1024)
{
printf("客户端数目超出!");
break;
}
}
return 0;
}