/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla.
 *
 * The Initial Developer of the Original Code is IBM Corporation.
 * Portions created by IBM Corporation are Copyright (C) 2003
 * IBM Corporation. All Rights Reserved.
 *
 * Contributor(s):
 *   IBM Corp.
 *
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#include "nsISupports.idl"

native PRNetAddr(union PRNetAddr);

/**
 * nsIDNSRecord
 *
 * this interface represents the result of a DNS lookup.  since a DNS
 * query may return more than one resolved IP address, the record acts
 * like an enumerator, allowing the caller to easily step through the
 * list of IP addresses.
 */
[scriptable, uuid(31c9c52e-1100-457d-abac-d2729e43f506)]
interface nsIDNSRecord : nsISupports
{
    /**
     * @return the canonical hostname for this record.  this value is empty if
     * the record was not fetched with the RESOLVE_CANONICAL_NAME flag.
     *
     * e.g., www.mozilla.org --> rheet.mozilla.org
     */
    readonly attribute ACString canonicalName;

    /**
     * this function copies the value of the next IP address into the
     * given PRNetAddr struct and increments the internal address iterator.
     *
     * @param aPort
     *        A port number to initialize the PRNetAddr with.
     *
     * @throws NS_ERROR_NOT_AVAILABLE if there is not another IP address in
     * the record.
     */
    [noscript] PRNetAddr getNextAddr(in PRUint16 aPort);

    /**
     * this function returns the value of the next IP address as a
     * string and increments the internal address iterator.
     *
     * @throws NS_ERROR_NOT_AVAILABLE if there is not another IP address in
     * the record.
     */
    ACString getNextAddrAsString();

    /**
     * this function returns true if there is another address in the record.
     */
    boolean hasMore();

    /**
     * this function resets the internal address iterator to the first
     * address in the record.
     */
    void rewind();
};