LINUX服务器service的socket，bind, listen, accept, read

#include<stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netinet/ip.h> /* superset of previous */
#include<stdlib.h>
#include <strings.h>
#include<unistd.h>


#include <string.h>

#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

#include <sys/types.h>          /* See NOTES */
#include <sys/socket.h>





#define SERV_IP 5001
#define SERV_IP_ADDR "192.168.64.0"
#define BACKLOG 5
#define BUFSIZE 1024
#define QUIT_STR "QUIT"
int main()
{
        //socket
        int fd = -1;
        fd = socket(AF_INET,SOCK_STREAM,0);
        if(fd < 0)
        {
                perror("socket");
                exit(1);
        }
        /*
           struct sockaddr_in {
           sa_family_t    sin_family;  address family: AF_INET 
           in_port_t      sin_port;    port in network byte order 
           struct in_addr sin_addr;    internet address 
           };

           Internet address. 
           struct in_addr {
           uint32_t       s_addr;      address in network byte order 
           };  */

        struct sockaddr_in sin;
        sin.sin_family = AF_INET;
        sin.sin_port = htons(SERV_IP);
        sin.sin_addr.s_addr = inet_addr(SERV_IP_ADDR);
        bzero(&sin,sizeof(sin));
        //bing
        if(bind(fd,(struct sockaddr *)&sin,sizeof(sin))<0)
        {
                perror("bind");
                exit(1);
        }

        //listen

        if(listen(fd,BACKLOG)<0)
        {
                perror("listen");
        }
        //accept

        int newfd=-1;
        newfd = accept(fd,NULL,NULL);
        if(newfd<0)
        {
                perror("accept");
                exit(1);
        }

        //read



        char buf[BUFSIZE];
        int ret = -1;
        while(1)
        {
                do{
                        bzero(buf,BUFSIZE);
                        ret = read(newfd,buf,BUFSIZE-1);

                }while(ret<1);
                if(ret<0)
                {
                        perror("read");
                        exit(1);
                }
                if(!ret)
                {
                        break;
                }
                printf("receive data :%s \n",buf);

                if(!strncasecmp(buf,QUIT_STR,strlen(QUIT_STR)))
                {
                        printf("Client is exiting!\n");
                        break;
                }
        }
        close(newfd);
        close(fd);
        return 0;
}