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* 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 "SipUdp.h"

#include "WebSocketPacket.h"

#include "MemoryDebug.h"

CWebSocketPacket::CWebSocketPacket()

{

}

CWebSocketPacket::~CWebSocketPacket()

{

}

/**

* @ingroup HttpStack

* @brief WebSocket 패킷을 저장한다.

* @param pszPacket 패킷

* @param iPacketLen 패킷 길이

* @returns true 를 리턴한다.

bool CWebSocketPacket::AddPacket( const char * pszPacket, int iPacketLen )

{

m_strBuf.append( pszPacket, iPacketLen );

return true;

}

/**

* @ingroup HttpStack

* @brief WebSocket 수신 데이터를 가져온다.

* @param clsHeader WebSocket 헤더 정보 저장 객체

* @param strData WebSocket 수신 데이터

* @returns WebSocket 수신 데이터가 존재하면 true 를 리턴하고 그렇지 않으면 false 를 리턴한다.

bool CWebSocketPacket::GetData( CWebSocketPacketHeader & clsHeader, std::string & strData )

{

strData.clear();

int iPacketLen = (int)m_strBuf.length();

if( iPacketLen < 2 )

{

return false;

}

const char * pszPacket = m_strBuf.c_str();

bool bMask = false;

if( (uint8_t)pszPacket[1] & 0x80 ) bMask = true;

clsHeader.m_iOpCode = (uint8_t)pszPacket[0] & 0x0F;

int iPayLoadLen = (uint8_t)pszPacket[1] & 0x7F;

int iWantLen = 0;

int iPayLoadPos = 0;

if( iPayLoadLen == 126 )

{

if( iPacketLen < 4 )

{

return false;

}

uint16_t sPayLoadLen;

memcpy( &sPayLoadLen, pszPacket + 2, 2 );

iPayLoadLen = ntohs( sPayLoadLen );

iWantLen = 2 + 2 + iPayLoadLen;

iPayLoadPos = 2 + 2;

}

else if( iPayLoadLen == 127 )

{

if( iPacketLen < 10 )

{

return false;

}

uint64_t lPayLoadLen;

memcpy( &lPayLoadLen, pszPacket + 2, 8 );

iPayLoadLen = ntohll( lPayLoadLen );

iWantLen = 2 + 8 + iPayLoadLen;

iPayLoadPos = 2 + 8;

}

else

{

iWantLen = 2 + iPayLoadLen;

iPayLoadPos = 2;

}

if( bMask )

{

iWantLen += 4;

}

if( iPacketLen < iWantLen )

{

return false;

}

if( bMask )

{

int iMaskPos = iPayLoadPos;

iPayLoadPos += 4;

char * pszData = (char *)malloc(iPayLoadLen);

if( pszData == NULL )

{

return false;

}

for( int i = 0; i < iPayLoadLen; ++i )

{

pszData[i] = pszPacket[iPayLoadPos+i] ^ pszPacket[iMaskPos+i%4];

}

strData.append( pszData, iPayLoadLen );

free( pszData );

}

else

{

strData.append( pszPacket + iPayLoadPos, iPayLoadLen );

}

m_strBuf.erase( 0, iWantLen );

return true;

}

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