#include int main()

{

int sockfd,new_fd;

struct sockaddr_in my_addr;

struct sockaddr_in their_addr;

int sin_size;

//建立TCP套接口

if((sockfd = socket(AF_INET,SOCK_STrEAM,0))==-1)

{

perror("socket");

exit(1);

}

//初始化结构体，并绑定2323端口

my_addr.sin_family = AF_INET;my_addr.sin_port = htons(2323);

my_addr.sin_addr.s_addr = INADDr_ANY;bzero(&(my_addr.sin_zero),8);

//绑定套接口

if(bind(sockfd,(struct sockaddr *)&my_addr,sizeof(struct sockaddr))==-1)

{

perror("bind");

exit(1);

}

//创建监听套接口

if(listen(sockfd,10)==-1)

{

perror("listen");

exit(1);

}

//等待连接

while(1) {

sin_size = sizeof(struct sockaddr_in);

perror("server is run");

//如果建立连接，将产生一个全新的套接字

if((new_fd = accept(sockfd,(struct sockaddr *)&their_addr,&sin_size))==-1)

{

perror("accept");

exit(1);

}

//生成一个子进程来完成和客户端的会话，父进程继续监听

if(!fork())

{

//读取客户端发来的信息

if((numbytes = recv(new_fd,buff,strlen(buff),0))==-1)

{

perror("recv");

exit(1);

}

printf("%s",buff);

//将从客户端接收到的信息再发回客户端

if(send(new_fd,buff,strlen(buff),0)==-1)

perror("send");

close(new_fd);

exit(0);

}

close(new_fd);

}

close(sockfd);

}