/*
* Copyright (C) 2012 Yee Young Han (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 "SdpMessage.h"
#include "MemoryDebug.h"
/**
* @ingroup SdpParser
* @brief 생성자
*/
CSdpMessage::CSdpMessage()
{
}
/**
* @ingroup SdpParser
* @brief 소멸자
*/
CSdpMessage::~CSdpMessage()
{
}
/**
* @ingroup SdpParser
* @brief SDP 메시지의 value 문자열을 파싱한다.
* @param pszText SDP 메시지의 value 문자열
* @param iTextLen SDP 메시지의 value 문자열 길이
* @returns 성공하면 파싱한 길이를 리턴하고 그렇지 않으면 -1를 리턴한다.
*/
int CSdpMessage::Parse( const char * pszText, int iTextLen )
{
Clear();
if( pszText == NULL || iTextLen <= 0 ) return -1;
int iPos, iStartPos = 0;
CSdpMedia * pclsMedia = NULL;
for( iPos = 0; iPos < iTextLen; ++iPos )
{
if( pszText[iPos] == '\r' )
{
if( iPos > ( iStartPos + 2 ) )
{
switch( pszText[iStartPos] )
{
case 'v':
m_strVersion.append( pszText + iStartPos + 2, iPos - ( iStartPos + 2 ) );
break;
case 'o':
if( m_clsOrigin.Parse( pszText + iStartPos + 2, iPos - ( iStartPos + 2 ) ) == -1 ) return -1;
break;
case 's':
m_strSessionName.append( pszText + iStartPos + 2, iPos - ( iStartPos + 2 ) );
break;
case 'i':
if( pclsMedia )
{
}
else
{
m_strSessionInformation.append( pszText + iStartPos + 2, iPos - ( iStartPos + 2 ) );
}
break;
case 'u':
m_strUri.append( pszText + iStartPos + 2, iPos - ( iStartPos + 2 ) );
break;
case 'e':
{
std::string strTemp;
strTemp.append( pszText + iStartPos + 2, iPos - ( iStartPos + 2 ) );
m_clsEmailList.push_back( strTemp );
}
break;
case 'p':
{
std::string strTemp;
strTemp.append( pszText + iStartPos + 2, iPos - ( iStartPos + 2 ) );
m_clsPhoneList.push_back( strTemp );
}
break;
case 'c':
if( pclsMedia )
{
if( pclsMedia->m_clsConnection.Parse( pszText + iStartPos + 2, iPos - ( iStartPos + 2 ) ) == -1 ) return -1;
}
else
{
if( m_clsConnection.Parse( pszText + iStartPos + 2, iPos - ( iStartPos + 2 ) ) == -1 ) return -1;
}
break;
case 'b':
{
CSdpBandWidth clsBandWidth;
if( clsBandWidth.Parse( pszText + iStartPos + 2, iPos - ( iStartPos + 2 ) ) == -1 ) return -1;
if( pclsMedia )
{
pclsMedia->m_clsBandWidthList.push_back( clsBandWidth );
}
else
{
m_clsBandWidthList.push_back( clsBandWidth );
}
}
break;
case 't':
{
CSdpTime clsTime;
if( clsTime.Parse( pszText + iStartPos + 2, iPos - ( iStartPos + 2 ) ) == -1 ) return -1;
m_clsTimeList.push_back( clsTime );
}
break;
case 'r':
{
SDP_TIME_LIST::reverse_iterator itTime = m_clsTimeList.rbegin();
if( itTime != m_clsTimeList.rend() )
{
std::string strTemp;
strTemp.append( pszText + iStartPos + 2, iPos - ( iStartPos + 2 ) );
itTime->m_clsRepeatTimeList.push_back( strTemp );
}
}
break;
case 'z':
m_strTimeZone.append( pszText + iStartPos + 2, iPos - ( iStartPos + 2 ) );
break;
case 'a':
{
CSdpAttribute clsAttribute;
if( clsAttribute.Parse( pszText + iStartPos + 2, iPos - ( iStartPos + 2 ) ) == -1 ) return -1;
if( pclsMedia )
{
pclsMedia->m_clsAttributeList.push_back( clsAttribute );
}
else
{
m_clsAttributeList.push_back( clsAttribute );
}
}
break;
case 'm':
{
CSdpMedia clsMedia;
if( clsMedia.Parse( pszText + iStartPos + 2, iPos - ( iStartPos + 2 ) ) == -1 ) return -1;
m_clsMediaList.push_back( clsMedia );
SDP_MEDIA_LIST::reverse_iterator itML = m_clsMediaList.rbegin();
pclsMedia = &(*itML);
}
break;
}
}
++iPos;
iStartPos = iPos + 1;
}
}
return iPos;
}
/**
* @ingroup SdpParser
* @brief SDP 메시지의 value 문자열을 저장한다.
* @param pszText SDP 메시지의 value 문자열을 저장할 변수
* @param iTextSize pszText 변수의 크기
* @returns 성공하면 저장된 문자열 길이를 리턴하고 그렇지 않으면 -1 를 리턴한다.
*/
int CSdpMessage::ToString( char * pszText, int iTextSize )
{
if( pszText == NULL || iTextSize <= 0 ) return -1;
int iLen = 0, n;
if( m_strVersion.empty() == false )
{
iLen += snprintf( pszText + iLen, iTextSize - iLen, "v=%s\r\n", m_strVersion.c_str() );
}
if( m_clsOrigin.Empty() == false )
{
iLen += snprintf( pszText + iLen, iTextSize - iLen, "o=" );
n = m_clsOrigin.ToString( pszText + iLen, iTextSize - iLen );
if( n == -1 ) return -1;
iLen += n;
iLen += snprintf( pszText + iLen, iTextSize - iLen, "\r\n" );
}
if( m_strSessionName.empty() == false )
{
iLen += snprintf( pszText + iLen, iTextSize - iLen, "s=%s\r\n", m_strSessionName.c_str() );
}
if( m_strSessionInformation.empty() == false )
{
iLen += snprintf( pszText + iLen, iTextSize - iLen, "i=%s\r\n", m_strSessionInformation.c_str() );
}
if( m_strUri.empty() == false )
{
iLen += snprintf( pszText + iLen, iTextSize - iLen, "u=%s\r\n", m_strUri.c_str() );
}
if( m_clsEmailList.empty() == false )
{
SDP_EMAIL_LIST::iterator itList;
for( itList = m_clsEmailList.begin(); itList != m_clsEmailList.end(); ++itList )
{
iLen += snprintf( pszText + iLen, iTextSize - iLen, "e=%s\r\n", itList->c_str() );
}
}
if( m_clsPhoneList.empty() == false )
{
SDP_PHONE_LIST::iterator itList;
for( itList = m_clsPhoneList.begin(); itList != m_clsPhoneList.end(); ++itList )
{
iLen += snprintf( pszText + iLen, iTextSize - iLen, "p=%s\r\n", itList->c_str() );
}
}
if( m_clsConnection.Empty() == false )
{
iLen += snprintf( pszText + iLen, iTextSize - iLen, "c=" );
n = m_clsConnection.ToString( pszText + iLen, iTextSize - iLen );
if( n == -1 ) return -1;
iLen += n;
iLen += snprintf( pszText + iLen, iTextSize - iLen, "\r\n" );
}
if( m_clsBandWidthList.empty() == false )
{
SDP_BANDWIDTH_LIST::iterator itList;
for( itList = m_clsBandWidthList.begin(); itList != m_clsBandWidthList.end(); ++itList )
{
iLen += snprintf( pszText + iLen, iTextSize - iLen, "b=" );
n = itList->ToString( pszText + iLen, iTextSize - iLen );
if( n == -1 ) return -1;
iLen += n;
iLen += snprintf( pszText + iLen, iTextSize - iLen, "\r\n" );
}
}
if( m_clsTimeList.empty() == false )
{
SDP_TIME_LIST::iterator itList;
for( itList = m_clsTimeList.begin(); itList != m_clsTimeList.end(); ++itList )
{
iLen += snprintf( pszText + iLen, iTextSize - iLen, "t=" );
n = itList->ToString( pszText + iLen, iTextSize - iLen );
if( n == -1 ) return -1;
iLen += n;
}
}
if( m_strTimeZone.empty() == false )
{
iLen += snprintf( pszText + iLen, iTextSize - iLen, "z=%s\r\n", m_strTimeZone.c_str() );
}
if( m_clsAttributeList.empty() == false )
{
SDP_ATTRIBUTE_LIST::iterator itList;
for( itList = m_clsAttributeList.begin(); itList != m_clsAttributeList.end(); ++itList )
{
iLen += snprintf( pszText + iLen, iTextSize - iLen, "a=" );
n = itList->ToString( pszText + iLen, iTextSize - iLen );
if( n == -1 ) return -1;
iLen += n;
iLen += snprintf( pszText + iLen, iTextSize - iLen, "\r\n" );
}
}
if( m_clsMediaList.empty() == false )
{
SDP_MEDIA_LIST::iterator itList;
for( itList = m_clsMediaList.begin(); itList != m_clsMediaList.end(); ++itList )
{
iLen += snprintf( pszText + iLen, iTextSize - iLen, "m=" );
n = itList->ToString( pszText + iLen, iTextSize - iLen );
if( n == -1 ) return -1;
iLen += n;
}
}
return iLen;
}
/**
* @ingroup SdpParser
* @brief 멤버 변수를 초기화시킨다.
*/
void CSdpMessage::Clear()
{
m_strVersion.clear();
m_strSessionName.clear();
m_strSessionInformation.clear();
m_strUri.clear();
m_strTimeZone.clear();
m_clsOrigin.Clear();
m_clsConnection.Clear();
m_clsEmailList.clear();
m_clsPhoneList.clear();
m_clsBandWidthList.clear();
m_clsTimeList.clear();
m_clsAttributeList.clear();
m_clsMediaList.clear();
}
/**
* @ingroup SdpParser
* @brief 미디어를 검색한다.
* @param pszMediaName 미디어 이름
* @param ppclsMedia 미디어 객체의 포인터 저장 변수
* @returns 성공하면 true 를 리턴하고 실패하면 false 를 리턴한다.
*/
bool CSdpMessage::SelectMedia( const char * pszMediaName, CSdpMedia ** ppclsMedia )
{
SDP_MEDIA_LIST::iterator itList;
for( itList = m_clsMediaList.begin(); itList != m_clsMediaList.end(); ++itList )
{
if( !strcmp( itList->m_strMedia.c_str(), pszMediaName ) )
{
*ppclsMedia = &(*itList);
return true;
}
}
return false;
}