/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 * Version: NPL 1.1/GPL 2.0/LGPL 2.1
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 * 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
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 *
 * Software distributed under the License is distributed on an "AS
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 * implied. See the License for the specific language governing
 * rights and limitations under the License.
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 * The Original Code is Novell code.
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 * Original Author: Robert O'Callahan (rocallahan@novell.com)
 *
 * Contributor(s):
 *
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 * either the GNU General Public License Version 2 or later (the "GPL"), or
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#include "nsISupports.idl"

/**
 * Network link status monitoring service.
 */
[scriptable, uuid(61618a52-ea91-4277-a4ab-ebe10d7b9a64)]
interface nsINetworkLinkService : nsISupports
{
  /**
   * This is set to true when the system is believed to have a usable
   * network connection.
   *
   * The link is only up when network connections can be established. For
   * example, the link is down during DHCP configuration (unless there
   * is another usable interface already configured).
   *
   * If the link status is not currently known, we generally assume that
   * it is up.
   */
  readonly attribute boolean isLinkUp;
  
  /**
   * This is set to true when we believe that isLinkUp is accurate.
   */
  readonly attribute boolean linkStatusKnown;
};

%{C++
/**
 * We send notifications through nsIObserverService with topic
 * NS_NETWORK_LINK_TOPIC whenever one of isLinkUp or linkStatusKnown
 * changes. We pass one of the NS_NETWORK_LINK_DATA_ constants below
 * as the aData parameter of the notification.
 */
#define NS_NETWORK_LINK_TOPIC "network:link-status-changed"

/**
 * isLinkUp is now true, linkStatusKnown is true.
 */
#define NS_NETWORK_LINK_DATA_UP      "up"
/**
 * isLinkUp is now false, linkStatusKnown is true.
 */
#define NS_NETWORK_LINK_DATA_DOWN    "down"
/**
 * linkStatusKnown is now false.
 */
#define NS_NETWORK_LINK_DATA_UNKNOWN "unknown"
%}