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

int creer_socket(int type, int *port_num) 
{  /* fonction de creation et d'attachement */
   /* d'une nouvelle socket */
   /* renvoie le numero de descripteur */
   /* et modifie le parametre port_num */

   int fd = 0;
   int sisize=sizeof(struct sockaddr_in );
   struct sockaddr_in serv_addr;
   memset(&serv_addr,0,sizeof(serv_addr));

   serv_addr.sin_port=htons(0);
   serv_addr.sin_family=AF_INET;
   serv_addr.sin_addr.s_addr=INADDR_ANY;

   fd=socket(AF_INET,type, IPPROTO_TCP);
   if (fd ==-1){
   	printf("ERROR\n");
   }
   bind(fd, (struct sockaddr*) &serv_addr, sizeof(struct sockaddr_in));
   getsockname(fd,(struct sockaddr*) &serv_addr,(socklen_t *)&sisize);

   *port_num=serv_addr.sin_port;
  
   return fd;
}


int do_accept(int s,struct sockaddr_in *sock){
    int news;
    int length=sizeof(struct sockaddr_in);
    news= accept(s,(struct sockaddr *) sock,(socklen_t*)&length);
    if(news!=-1){
      ERROR_EXIT("accept");
    }

    return news;
}
void close_correctly (int sock1){
    int c;
    c=close(sock1);

    if (c==-1){
      ERROR_EXIT("exit");
    }
}

void do_listen(int sockfd,int num_machine){
  if (-1==listen(sockfd,num_machine)){
    ERROR_EXIT("listen");
  }
}

void init_addr_info(struct sockaddr_in* server,const char* name, const int  port) {

  struct hostent *server_host;

  server->sin_family=AF_INET;
  server->sin_port=htons(port);
  server_host=gethostbyname(name);
  server->sin_addr=*(struct in_addr*)server_host->h_addr;

}