/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 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 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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 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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#include "nsPIDNSService.h"
#include "nsIIDNService.h"
#include "nsIObserver.h"
#include "nsHostResolver.h"
#include "nsAutoPtr.h"
#include "nsString.h"
#include "prlock.h"

class nsDNSService : public nsPIDNSService
                   , public nsIObserver
{
public:
    NS_DECL_ISUPPORTS
    NS_DECL_NSPIDNSSERVICE
    NS_DECL_NSIDNSSERVICE
    NS_DECL_NSIOBSERVER

    nsDNSService();
    ~nsDNSService();

private:
    PRUint16 GetAFForLookup(const nsACString &host);

    nsRefPtr<nsHostResolver>  mResolver;
    nsCOMPtr<nsIIDNService>   mIDN;

    // mLock protects access to mResolver and mIPv4OnlyDomains
    PRLock                   *mLock;

    // mIPv4OnlyDomains is a comma-separated list of domains for which only
    // IPv4 DNS lookups are performed. This allows the user to disable IPv6 on
    // a per-domain basis and work around broken DNS servers. See bug 68796.
    nsAdoptingCString         mIPv4OnlyDomains;
    PRBool                    mDisableIPv6;
};