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PacketHeader.cpp
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170 lines (155 loc) · 4.37 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 "PacketHeader.h"
#include <stdio.h>
#include "MemoryDebug.h"
/**
* @ingroup SipCallDump
* @brief UDP 패킷인지 검사한다.
* @param psttIp4Header IPv4 헤더
* @returns UDP 패킷이면 true 를 리턴하고 그렇지 않으면 false 를 리턴한다.
*/
bool IsUdpPacket( Ip4Header * psttIp4Header )
{
if( ( psttIp4Header->ver_ihl & 0xF0 ) == 0x40 )
{
if( psttIp4Header->proto == IP_PROTO_UDP )
{
return true;
}
}
else if( ( psttIp4Header->ver_ihl & 0xF0 ) == 0x60 )
{
Ip6Header * psttIp6Header = ( Ip6Header * )psttIp4Header;
if( psttIp6Header->next_header == IP_PROTO_UDP )
{
return true;
}
}
return false;
}
/**
* @ingroup SipCallDump
* @brief TCP 패킷인지 검사한다.
* @param psttIp4Header IPv4 헤더
* @returns TCP 패킷이면 true 를 리턴하고 그렇지 않으면 false 를 리턴한다.
*/
bool IsTcpPacket( Ip4Header * psttIp4Header )
{
if( ( psttIp4Header->ver_ihl & 0xF0 ) == 0x40 )
{
if( psttIp4Header->proto == IP_PROTO_TCP )
{
return true;
}
else
{
return false;
}
}
else if( ( psttIp4Header->ver_ihl & 0xF0 ) == 0x60 )
{
Ip6Header * psttIp6Header = ( Ip6Header * )psttIp4Header;
if( psttIp6Header->next_header == IP_PROTO_TCP )
{
return true;
}
}
return false;
}
/** IP 헤더 길이를 리턴한다.
* @ingroup SipCallDump
* @brief IP 헤더 길이를 리턴한다.
* @param psttIp4Header IPv4 헤더
* @returns IP 헤더 길이를 리턴한다.
*/
int GetIpHeaderLength( Ip4Header * psttIp4Header )
{
if( ( psttIp4Header->ver_ihl & 0xF0 ) == 0x40 )
{
return ( psttIp4Header->ver_ihl & 0x0F ) * 4;
}
else if( ( psttIp4Header->ver_ihl & 0xF0 ) == 0x60 )
{
return 40;
}
return 0;
}
/**
* @ingroup SipCallDump
* @brief network order IP 주소를 문자열 IP 주소에 저장한다.
* @param iIp IP 주소
* @param pszIp [out] IP 주소 저장 변수
* @param iIpSize pszIp 변수의 크기
*/
void GetIpString( uint32_t iIp, char * pszIp, int iIpSize )
{
snprintf( pszIp, iIpSize, "%d.%d.%d.%d", iIp & 0xFF, ( iIp >> 8 ) & 0xFF, ( iIp >> 16 ) & 0xFF, ( iIp >> 24 ) & 0xFF );
}
/**
* @ingroup SipCallDump
* @brief TCP 헤더 길이를 리턴한다.
* @param psttTcpHeader TCP 헤더
* @returns TCP 헤더 길이를 리턴한다.
*/
int GetTcpHeaderLength( TcpHeader * psttTcpHeader )
{
return ( ( psttTcpHeader->hlen >> 4 ) & 0x0F ) * 4;
}
/**
* @ingroup SipCallDump
* @brief RTP 패킷인지 검사한다.
* @param pszUdpBody UDP body
* @param iUdpBodyLen UDP body 길이
* @returns RTP 패킷이면 true 를 리턴하고 그렇지 않으면 false 를 리턴한다.
*/
bool IsRtpPacket( char * pszUdpBody, int iUdpBodyLen )
{
if( (uint8_t)pszUdpBody[0] == 0x80 || (uint8_t)pszUdpBody[0] == 0x81 )
{
return true;
}
return false;
}
/**
* @ingroup SipCallDump
* @brief SIP 메시지인지 검사한다.
* @param pszUdpBody UDP body
* @param iUdpBodyLen UDP body 길이
* @returns SIP 패킷이면 true 를 리턴하고 그렇지 않으면 false 를 리턴한다.
*/
bool IsSipPacket( char * pszUdpBody, int iUdpBodyLen )
{
if( !strncmp( pszUdpBody, "INVITE ", 7 ) ||
!strncmp( pszUdpBody, "CANCEL ", 7 ) ||
!strncmp( pszUdpBody, "BYE ", 4 ) ||
!strncmp( pszUdpBody, "ACK ", 4 ) ||
!strncmp( pszUdpBody, "REFER ", 6 ) ||
!strncmp( pszUdpBody, "NOTIFY ", 7 ) ||
!strncmp( pszUdpBody, "PRACK ", 6 ) ||
!strncmp( pszUdpBody, "INFO ", 5 ) ||
!strncmp( pszUdpBody, "MESSAGE ", 8 ) ||
!strncmp( pszUdpBody, "OPTIONS ", 8 ) ||
!strncmp( pszUdpBody, "SUBSCRIBE ", 10 ) ||
!strncmp( pszUdpBody, "SIP/2.0", 7 ) )
{
return true;
}
return false;
}