1 #include<stdlib.h>
2 #include<string.h>
3 #include<stdio.h>
4 #include<sys/socket.h>
5 #include<arpa/inet.h>
6 #include<sys/types.h>
7 #include<netinet/in.h>
8 #define SERVER_PORT 8000
9 int main()
10 {
11 struct sockaddr_in serveraddr,clientaddr;
12 //1,socket()
13 //2,bind()
14 //3,listen()
15 //4,accept()
16 char ipstr[128];
17 int sockfd,addrlen,confd;
18 sockfd=socket(AF_INET,SOCK_STREAM,0);
19
20 bzero(&serveraddr,sizeof(serveraddr));
21 serveraddr.sin_family=AF_INET;
22 serveraddr.sin_addr.s_addr=htonl(INADDR_ANY);
23 serveraddr.sin_port=htons(SERVER_PORT);
24
25 bind(sockfd,(struct sockaddr *)&serveraddr,sizeof(serveraddr));
26
27 listen(sockfd,128);
28 while(1){
29 addrlen=sizeof(clientaddr);
30 confd=accept(sockfd,(struct sockaddr *)&clientaddr,&addrlen);
31
32 printf("client ip %s\t port %d\n",inet_ntop(AF_INET,&clientaddr.sin_addr.s_addr,ipstr,sizeof(ipstr)),ntohs(clientaddr.sin_port));
33
34 //connet with client
35 close(confd);
36 }
37
38 close(sockfd);
39
40 return 0;
41 }
