//
// IP gethostname
//

#include "netlib.h"

int ip_host2addr( const char *host, const char *service, struct sockaddr_storage *sa, socklen_t *len )
{
  struct hostent *ent;
  
  /* do host lookup matching family (this is not POSIX) */
  if ( (ent = gethostbyname2( host, AF_INET6 )) == NULL )
  {
    if ( (ent = gethostbyname2( host, AF_INET )) == NULL )
    {
      log_error( "gethostbyname" );
      return -1;
    }
  }
  int family = ent->h_addrtype;
  
  // service
  int port = ip_service2port( service, atoi(service), NULL );
  
  /* clear and initialize address structure */
  if ( sa )
    bzero(sa, sizeof(struct sockaddr_storage) );
  
  if ( family == AF_INET6 )
  {
    if ( sa )
    {
      struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *)sa;
      sa6->sin6_family = family;
      sa6->sin6_port = port;
      sa6->sin6_addr = *((struct in6_addr *)ent->h_addr);
    }
    if ( len )
      *len = sizeof(struct sockaddr_in6);
  }
  else if ( family == AF_INET )
  {
    if ( sa )
    {
      struct sockaddr_in  *sa4 = (struct sockaddr_in *)sa;
      sa4->sin_family = family;
      sa4->sin_port = port;
      sa4->sin_addr = *((struct in_addr *)ent->h_addr);
    }
    if ( len )
      *len = sizeof(struct sockaddr_in);
  }
  else
    return -1;
  
  return family;
}