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Copy pathPacketDumpThread.cpp
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152 lines (131 loc) · 3.8 KB
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/*
* 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 "SipPlatformDefine.h"
#include "SipCallDump.h"
#include "SipCallDumpSetup.h"
#include "ServerService.h"
#include "ServerUtility.h"
#include "Log.h"
#include "PacketDump.h"
#include "MemoryDebug.h"
/**
* @ingroup SipCallDump
* @brief 패킷 덤프 쓰레드
* @param lpParameter
* @returns 0 을 리턴한다.
*/
THREAD_API PacketDumpThread( LPVOID lpParameter )
{
pcap_t * psttPcap = NULL;
char szErrBuf[PCAP_ERRBUF_SIZE];
struct pcap_pkthdr * psttHeader;
const u_char * pszData;
int n, iIpHeaderLen, iIpPos;
Ip4Header * psttIp4Header; // IPv4 Header
bool bPcapFile = false;
bool bRestartPcap = false;
uint32_t iPacketCount = 0;
CLog::Print( LOG_INFO, "%s is started", __FUNCTION__ );
if( gstrPcapFileName.empty() == false )
{
CLog::Print( LOG_DEBUG, "pcap_open_offline(%s)", gstrPcapFileName.c_str() );
psttPcap = pcap_open_offline( gstrPcapFileName.c_str(), szErrBuf );
bPcapFile = true;
}
else
{
START_PCAP:
psttPcap = pcap_open_live( gclsSetup.m_strPacketDevice.c_str(), gclsSetup.m_iPacketSnapLen, 1, gclsSetup.m_iPacketReadTimeout, szErrBuf );
}
if( psttPcap == NULL )
{
CLog::Print( LOG_ERROR, "pcap_open_live(%s) error(%d)", gclsSetup.m_strPacketDevice.c_str(), errno );
goto FUNC_END;
}
CLog::Print( LOG_DEBUG, "pcap_open_live(%s) success", gclsSetup.m_strPacketDevice.c_str() );
while( gbStop == false )
{
n = pcap_next_ex( psttPcap, &psttHeader, &pszData );
if( n > 0 )
{
++iPacketCount;
if( psttHeader->caplen < MIN_PACKET_SIZE ) continue;
if( pszData[12] == 0x81 )
{
iIpPos = 18; // VLAN
}
else if( pszData[12] == 0x08 )
{
iIpPos = 14; // IP
}
else
{
continue;
}
psttIp4Header = (Ip4Header *)( pszData + iIpPos );
// IPv4 만 검사한다.
if( ( psttIp4Header->ver_ihl & 0xF0 ) != 0x40 ) continue;
iIpHeaderLen = GetIpHeaderLength( psttIp4Header );
if( iIpHeaderLen == 0 ) continue;
if( IsUdpPacket( psttIp4Header ) )
{
PacketDumpUdp( psttPcap, psttHeader, pszData, psttIp4Header, iIpPos, iIpHeaderLen );
}
else if( IsTcpPacket( psttIp4Header ) )
{
PacketDumpTcp( psttPcap, psttHeader, pszData, psttIp4Header, iIpPos, iIpHeaderLen );
}
}
else
{
if( bPcapFile )
{
gbStop = true;
break;
}
if( n == -1 )
{
if( iPacketCount > 0 )
{
// 에러가 발생하였지만 기존에 수신된 패킷들이 있다면 pcap 을 다시 시작한다.
bRestartPcap = true;
iPacketCount = 0;
}
break;
}
}
}
FUNC_END:
if( psttPcap ) pcap_close( psttPcap );
if( bRestartPcap )
{
bRestartPcap = false;
goto START_PCAP;
}
CLog::Print( LOG_INFO, "%s is stoped", __FUNCTION__ );
return 0;
}
/**
* @ingroup SipCallDump
* @brief 패킷 덤프 쓰레드를 시작한다.
* @returns 성공하면 true 를 리턴하고 실패하면 false 를 리턴한다.
*/
bool StartPacketDumpThread( )
{
return StartThread( "PacketDumpThread", PacketDumpThread, NULL );
}