PR_GetAddrInfoByName
====================

Looks up a host by name. Equivalent to ``getaddrinfo(host, NULL, ...)``
of RFC 3493.


Syntax
------

.. code::

   #include <prnetdb.h>

   PRAddrInfo *PR_GetAddrInfoByName(
     const char *hostname,
     PRUint16 af,
     PRIntn flags);


Parameters
~~~~~~~~~~

The function has the following parameters:

``hostname``
   The character string defining the host name of interest.
``af``
   The address family. May be ``PR_AF_UNSPEC`` or ``PR_AF_INET``.
``flags``
   May be either ``PR_AI_ADDRCONFIG`` or
   ``PR_AI_ADDRCONFIG | PR_AI_NOCANONNAME``. Include
   ``PR_AI_NOCANONNAME`` to suppress the determination of the canonical
   name corresponding to ``hostname``


Returns
~~~~~~~

The function returns one of the following values:

-  If successful, a pointer to the opaque ``PRAddrInfo`` structure
   containing the results of the host lookup. Use
   :ref:`PR_EnumerateAddrInfo` to inspect the :ref:`PRNetAddr` values stored
   in this structure. When no longer needed, this pointer must be
   destroyed with a call to :ref:`PR_FreeAddrInfo`.
-  If unsuccessful, ``NULL``. You can retrieve the reason for the
   failure by calling :ref:`PR_GetError`.