/* 
 * Copyright (C) 2012 Yee Young Han <websearch@naver.com> (http://blog.naver.com/websearch)
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA 
 */

#include "SipTcp.h"
#include "Log.h"
#include "ServerThread.h"
#include "ServerService.h"
#include "ServerUtility.h"
#include "MemoryDebug.h"

/**
 * @ingroup ServerPlatform
 * @brief SipLoadBalancer °ü¸®¸¦ À§ÇÑ ³×Æ®¿öÅ© ¼­¹ö ¾²·¹µå ÇÔ¼ö
 * @param lpParameter Àǹ̾øÀ½
 * @returns 0 À» ¸®ÅÏÇÑ´Ù.
 */
THREAD_API ServerThread( LPVOID lpParameter )
{
	IMonitorCallBack * pclsCallBack = (IMonitorCallBack *)lpParameter;
	Socket hMonitorSocket;
	pollfd sttPoll[1];
	char	szIp[INET6_ADDRSTRLEN];
	int		iPort, n;
	std::string	strIp;

	hMonitorSocket = TcpListen( pclsCallBack->m_iMonitorPort, 255, NULL, pclsCallBack->m_bIpv6 );
	if( hMonitorSocket == INVALID_SOCKET )
	{
		CLog::Print( LOG_ERROR, "Monitor Tcp Server Port(%d) open error(%d)", pclsCallBack->m_iMonitorPort, GetError() );
	}
	else
	{
		sttPoll[0].fd = hMonitorSocket;
		sttPoll[0].events = POLLIN;
		sttPoll[0].revents = 0;
	}

	CLog::Print( LOG_INFO, "MonitorServerThread is started" );

	while( gbStop == false )
	{
		n = poll( sttPoll, 1, 1000 );
		if( n <= 0 )
		{
			continue;
		}

		Socket hClientSocket = TcpAccept( hMonitorSocket, szIp, sizeof(szIp), &iPort );
		if( hClientSocket == INVALID_SOCKET )
		{

		}
		else if( pclsCallBack->IsMonitorIp( szIp ) )
		{
			StartMonitorThread( hClientSocket, szIp, iPort, pclsCallBack );
		}
		else
		{
			if( strcmp( strIp.c_str(), szIp ) )
			{
				CLog::Print( LOG_ERROR, "monitor client(%s:%d) is disconnected because it's ip is not monitor ip", szIp, iPort );
				strIp = szIp;
			}

			closesocket( hClientSocket );
		}
	}

	closesocket( hMonitorSocket );

	CLog::Print( LOG_INFO, "MonitorServerThread is terminated" );

	return 0;
}

/**
 * @ingroup ServerPlatform
 * @brief ¸ð´ÏÅ͸µ ¼­¹ö ¾²·¹µå¸¦ ½ÃÀÛÇÑ´Ù.
 * @param pclsCallBack	¸ð´ÏÅ͸µ callback ÀÎÅÍÆäÀ̽º
 * @returns ¼º°øÇϸé true ¸¦ ¸®ÅÏÇÏ°í ±×·¸Áö ¾ÊÀ¸¸é false ¸¦ ¸®ÅÏÇÑ´Ù.
 */
bool StartMonitorServerThread( IMonitorCallBack * pclsCallBack )
{
	if( pclsCallBack == NULL ) 
	{
		CLog::Print( LOG_ERROR, "%s pclsCallBack is NULL", __FUNCTION__ );
		return false;
	}

	if( pclsCallBack->m_iMonitorPort <= 0 || pclsCallBack->m_iMonitorPort > 65535 )
	{
		CLog::Print( LOG_ERROR, "%s m_iMonitorPort(%d) is invalid", __FUNCTION__, pclsCallBack->m_iMonitorPort );
		return false;
	}

	if( StartThread( "MonitorServerThread", ServerThread, pclsCallBack ) == false ) return false;

	return true;
}