#include <string.h>
#include <stdio.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <unistd.h>
#include <stdlib.h>

#define PORT 66666
#define BACKLOG 10
int main(int argc, char ** argv){

     int server_sockfd, client_sockfd;
     int server_len, client_len;
     struct sockaddr_in server_address;
     struct sockaddr_in client_address;

     if(argc!=2){
          printf("\nUsage: ./server1 <port>\n");
          exit(1);
     }
     server_sockfd = socket(AF_INET, SOCK_STREAM,0);
     bzero(&server_address, sizeof(server_address));

     server_address.sin_family    = AF_INET;
     server_address.sin_addr.s_addr     = INADDR_ANY;
     server_address.sin_port       = htons(atoi(argv[1]));
     
     bind(server_sockfd, (struct sockaddr *)&server_address, server_len);

     if((listen(server_sockfd,(int) BACKLOG))== -1){
          perror("listen: ");
          exit(1);
     }
     printf("\nListening on port %d\n\n", ntohs(server_address.sin_port));

     int n;
     char buf[256];
     while(1){
          printf("The server is waiting for a connexion... \n\n");
          client_len=sizeof(client_address);
          if((client_sockfd=accept(server_sockfd,(struct sockaddr *)&client_address, &client_len)) ==-1){
               perror("connection: ");
               exit(1);
          }
          while((n = read(client_sockfd, &buf,250))>0)
               printf("You've written: %s\n\n", buf);
          close (client_sockfd);
     }


     return 0;

}

#define PORT 66666