CS473 - Computer Networks

Displaying exercises/e5/files/host.c

/* Includes go here */

/* host.c:
 *   A program to print the IP address of a host specified on the command
 *   line.  If no argument is provided, print a usage message and exit.
 * Example input/output:
 * > ./host www.indstate.edu
 * Host: www-prod-cms-lb.indstate.edu
 * Aliases:
 *   www.indstate.edu
 * Host type: IPv4
 * Addresses:
 *   139.102.15.65
 */

int main(int argc, char *argv[])
{
  /* man 3 gethostbyname for information on the hostent structure: */

  
  /**
   * Use the gethostbyname(3) function to look-up the host provided on the
   * first command line argument (argv[1]), assign the result to host.  If
   * host is NULL, print "Host not found: " followed by name of the host and
   * exit with a value of 1:
   */



  /* Print the name of the host: */


  /**
   * If h_aliases[0] is not null, then print a list of aliases, otherwise don't:
   * (there may be more than one, ex: cs.indstate.edu while logged into CS)
   */

  
  /* Print the host type (IPv4 or IPv6). */


  /**
   * Print the addresses, there may be more than one: (ex: amazon.com)
   * Use the inet_ntop(3) function to write the IP-address into a buffer, then
   * print the string found in the buffer.
   */




  return 0;
}