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+PRHostEnt
+=========
+
+A structure that defines a list of network addresses. This structure is
+output from :ref:`PR_GetHostByName` and :ref:`PR_GetHostByAddr` and passed to
+:ref:`PR_EnumerateHostEnt`. Clients should avoid directly accessing any of
+the structure's fields.
+
+
+Syntax
+------
+
+.. code::
+
+   #include <prnetdb.h>
+
+   typedef struct PRHostEnt {
+     char *h_name;
+     char **h_aliases;
+   #if defined(_WIN32)
+     PRInt16 h_addrtype;
+     PRInt16 h_length;
+   #else
+     PRInt32 h_addrtype;
+     PRInt32 h_length;
+   #endif
+     char **h_addr_list;
+   } PRHostEnt;
+
+
+Fields
+~~~~~~
+
+The structure has the following fields:
+
+``h_name``
+   Pointer to the official name of host.
+``h_aliases``
+   Pointer to a pointer to list of aliases. The list is terminated with
+   a ``NULL`` entry.
+``h_addrtype``
+   Host address type. For valid NSPR usage, this field must have a value
+   indicating either an IPv4 or an IPv6 address.
+``h_length``
+   Length of internal representation of the address in bytes. All of the
+   addresses in the list are of the same type and therefore of the same
+   length.
+``h_addr_list``
+   Pointer to a pointer to a list of addresses from name server (in
+   network byte order). The list is terminated with a ``NULL`` entry.
+
+
+Description
+-----------
+
+This structure is used by many of the network address functions. All
+addresses are passed in host order and returned in network order
+(suitable for use in system calls).
+
+Use the network address functions to manipulate the :ref:`PRHostEnt`
+structure. To make the transition to IP version 6 easier, it's best to
+treat :ref:`PRHostEnt` as an opaque structure.
+
+Note
+----
+
+``WINSOCK.H`` defines ``h_addrtype`` and ``h_length`` as a 16-bit field,
+whereas other platforms treat it as a 32-bit field. The ``#ifdef`` in
+the structure allows direct assignment of the :ref:`PRHostEnt` structure.