// Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of "Eclipse Public License v1.0"

// which accompanies this distribution, and is available

// at the URL "http://www.eclipse.org/legal/epl-v10.html".

//

// Initial Contributors:

// Nokia Corporation - initial contribution.

//

// Contributors:

//

// Description:

// llmnrconf.cpp - LLMNR (linklocal multicast name resolver) configuration

// file parser module

//

#ifdef LLMNR_ENABLED

#include <f32file.h>	// RFs

#include <in_sock.h>	// TInetAddr

#include <es_ini.h>

#include "dnd_ini.h"

#include "engine.h"

#include "llmnrresponder.h"	// this

#include "inet6log.h"

CLlmnrConf::CLlmnrConf(CDndEngine &aControl)

: iControl(aControl)

	{

	}

CLlmnrConf::~CLlmnrConf()

	{

	delete iHostList;

	}

void CLlmnrConf::ConstructL()

	{

	iLlmnrEntries = iControl.GetIniValue(DND_INI_LLMNR, LLMNR_INI_ENTRIES, 0, 0, KLlmnrMaxEnabled);

	iNotifyTime = iControl.GetIniValue(DND_INI_LLMNR, LLMNR_INI_NOTIFYTIME, KLlmnrIni_NotifyTime, 1, KMaxTInt);

	iRescans = iControl.GetIniValue(DND_INI_LLMNR, LLMNR_INI_RESCANS, KLlmnrIni_Rescans, 1, 255);

	iTTL = iControl.GetIniValue(DND_INI_LLMNR, LLMNR_INI_TTL, KLlmnrIni_Ttl, 1, KMaxTInt);

	}

void CLlmnrConf::GetHostNamesL()

	{

	delete iHostList;

	iHostList = NULL;

	// Aways allocate the array "skeleton" to keep things simple.

	iHostList = new (ELeave) CArrayFixFlat<THostNameEntry>(iLlmnrEntries < 1 ? 1 : iLlmnrEntries);

	for (TUint i = 1; i <= iLlmnrEntries; ++i)

		{

		THostNameEntry entry;

		// Borrow he iName field of the entry

		entry.iName = LLMNR_INI_ENTRY;

		entry.iName.AppendNum(i);

		TPtrC entrystr;

		if(!iControl.FindVar(DND_INI_LLMNR, entry.iName, entrystr))

			{

			// This log message should probably be logged in release also

			LOG(Log::Printf(_L("DND LMNR: %S is missing [%S] %S%d\r\n"), &DND_INI_DATA, &DND_INI_LLMNR, &LLMNR_INI_ENTRY, (TInt)i));

			continue;

			}

		TLex wordLex(entrystr);

		// Get hostname

		wordLex.Mark();

		while (!wordLex.Eos() && wordLex.Peek() != ',')

			wordLex.Inc();

		TInt err = 0;

		for (;;)

			{

			const TInt N = wordLex.MarkedToken().Length();

			if (N <= 0 || N > entry.iName.MaxLength())

				{

				err = 1;

				break;	// invalid hostname (either not given or too long)

				}

			entry.iName = wordLex.MarkedToken();

			// By default, entry is valid for ...

			entry.iVersion = EIPany;		// ...both IPv4 and IPv6

			entry.iIfName.SetLength(0);		// ...any interface

			if(wordLex.Eos())

				break;

			// Get interface name

			wordLex.Inc();

			if(wordLex.Peek() != ',') // not ",," after hostname

				{

				wordLex.Mark();

				while (!wordLex.Eos() && wordLex.Peek() != ',')

					wordLex.Inc();

				if (wordLex.MarkedToken().Length() > entry.iIfName.MaxLength())

					{

					err = 2;

					break;

					}

				entry.iIfName = wordLex.MarkedToken();

				}

			if(wordLex.Eos())

				break;

			// Get ip-version

			wordLex.Inc();

			if(wordLex.Eos()) // Eos after ','

				break;

			TInt n;

			if((wordLex.Val(n) != KErrNone) || (n != 0 && n != 4 && n != 6))

				err = 1;

			else

				entry.iVersion = (TIpVer)n;

			break;

			}

		if (err)

			{

			LOG(Log::Printf(_L("DND LMNR: %S has invalid [%S] %S%d= %S [ignored]\r\n"), &DND_INI_DATA, &DND_INI_LLMNR, &LLMNR_INI_ENTRY, (TInt)i, &entrystr));

			}

		else

			iHostList->AppendL(entry);

		}

	}

#endif