.. efun:: string query_ip_number(object  ob)
  string query_ip_number(mixed & ob)

  Give the ip-number for the current user or the optional argument ob.

  If ob is given as reference (and it must be a valid object then), it will upon return be set to the struct sockaddr_in of the queried object, represented by an array of integers, one integer per address byte:

    ob[0.. 1]: sin_family
    ob[2.. 3]: sin_port
    ob[4.. 7]: sin_addr
    ob[8..15]: undefined.

  :history 3.2.1@81 changed: added the return of the struct sockaddr.

  .. seealso:: :efun:`query_ip_name`