evatransfer.cpp

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/***************************************************************************
 *   Copyright (C) 2005 by yunfan                                          *
 *   yunfan_zg@163.com                                                     *
 *                                                                         *
 *   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 2 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 "evatransfer.h"
#include "../evautil.h"
#include <string.h>
#ifdef _WIN32
#include <winsock.h>
#else
#include <arpa/inet.h>
#endif

EvaPicTransferPacket::EvaPicTransferPacket() 
        : EvaPicOutPacket(QQ_05_CMD_TRANSFER, false), fragment(NULL)
{
        cryptPosition = NO_CRYPTOGRAPH;
        requestSend = false;
        dataReply = false;
}

EvaPicTransferPacket::EvaPicTransferPacket(const bool isDataPacket, const bool isLastPacket)
        : EvaPicOutPacket(QQ_05_CMD_TRANSFER, isDataPacket?(isLastPacket?true:false):true)
        , fragment(NULL)
{
        cryptPosition = NO_CRYPTOGRAPH;
        isData = isDataPacket;
        isLast = isLastPacket;
        requestSend = true;
}

EvaPicTransferPacket::EvaPicTransferPacket(const EvaPicTransferPacket &rhs)
        : EvaPicOutPacket(rhs)
{
        *this = rhs;
}

EvaPicTransferPacket::~EvaPicTransferPacket()
{
        if(fragment)
                delete fragment;
}

EvaPicTransferPacket &EvaPicTransferPacket::operator=(const EvaPicTransferPacket &rhs)
{
        *((EvaPicOutPacket*)this) = (EvaPicOutPacket)rhs;
        sessionID = rhs.getSessionID();
        
        memcpy(md5, rhs.getMD5(), 16); // always 16 bytes long
        imageLength = rhs.getImageLength();
        fileName = rhs.getFileName();
        
        fragLength = rhs.getFragmentLength();
        memcpy(fragment, rhs.getFragment(), fragLength);
        isData = rhs.isDataPacket();
        isLast = rhs.isLastPacket();
        
        requestSend = rhs.isRequestSend();
        dataReply = rhs.isDataReply();
        return *this;
}

void EvaPicTransferPacket::setMd5(const unsigned char *value)
{
        memcpy(md5, value, 16);
}

void EvaPicTransferPacket::setFragment(const unsigned char *data, const unsigned int len)
{
        if(!fragment)
                fragment = new unsigned char[len];
        fragLength = len;
        memcpy(fragment, data, fragLength);
}

int EvaPicTransferPacket::putBody(unsigned char *buf)
{
        int pos=0;
        unsigned int tmp4_1 = htonl(0x01000000), tmp4_2 = 0;
        if(!requestSend){
                memcpy(buf+pos, &tmp4_1, 4);
                pos+=4;
                memcpy(buf+pos, &tmp4_2, 4);
                pos+=4;                    // ignore 8 bytes
                
                tmp4_1 = htonl(sessionID);
                memcpy(buf+pos, &tmp4_1, 4);
                pos+=4;
                
                memset(buf+pos, 0, 4);
                pos+=4;  // unknown 4 bytes, all 0s
                
                unsigned short tmp2;
                if(dataReply){
                        tmp2 = (unsigned short)htons(1);
                        memcpy(buf+pos, &tmp2, 2);  //  the following length
                        pos+=2;
                        
                        buf[pos++] = 0x02;   // the contents
                }else{
                        tmp2 = (unsigned short)htons(4);
                        memcpy(buf+pos, &tmp2, 2);     //  the following length
                        pos+=2;
                        
                        memset(buf+pos, 0, 4);     // the contents
                        pos+=4;
                }
        }else{
                if(isData){
                        if(isLast){ // if is last , should be random 8 bytes
                                tmp4_1 = 1;
                                tmp4_2 = 0;
                                memcpy(buf+pos, &tmp4_1, 4); pos+=4;
                                memcpy(buf+pos, &tmp4_2, 4); pos+=4;
                        }else{
                                buf[pos++] = 0x01;
                                memset(buf+pos, 0, 6); pos+=6;
                                buf[pos++] = 0x01;
                        }
                        tmp4_1 = htonl(sessionID);
                        memcpy(buf+pos, &tmp4_1, 4); pos+=4;
                        
                        memset(buf+pos, 0, 4); pos+=4;
                        
                        unsigned short tmp2 = htons(fragLength);
                        memcpy(buf+pos, &tmp2, 2); pos+=2;
                        
                        memcpy(buf+pos, fragment, fragLength); pos+=fragLength;
                }else{
                        tmp4_1 = 1;
                        tmp4_2 = 0;
                        memcpy(buf+pos, &tmp4_1, 4); pos+=4;
                        memcpy(buf+pos, &tmp4_2, 4); pos+=4; // unknown 8 bytes
                        
                        tmp4_1 = htonl(sessionID);
                        memcpy(buf+pos, &tmp4_1, 4); pos+=4;
                        
                        memset(buf+pos, 0, 4); pos+=4;
                        
                        pos+=2;
                        int start = pos;
                        pos+=2;
                        memcpy(buf+pos, md5, 16); pos+=16;
                        
                        memcpy(buf+pos, EvaUtil::doMd5((char *)fileName.c_str(), fileName.length()), 16); pos+=16;
                        
                        tmp4_1 = htonl(imageLength);
                        memcpy(buf+pos, &tmp4_1, 4); pos+=4;
                        
                        short tmp2 = htons(fileName.length());
                        memcpy(buf+pos, &tmp2, 2); pos+=2;
                        
                        memcpy(buf+pos, fileName.c_str(), fileName.length()); pos+=fileName.length();
                        
                        memset(buf+pos, 0, 8); pos+=8;
                        
                        tmp2 = htons((short)(pos - start));
                        memcpy(buf+start-2, &tmp2, 2);
                        memcpy(buf+start, &tmp2, 2);
                }
        }
        return pos;
}


/************************************************************************************************************************************************/


EvaPicTransferReplyPacket::EvaPicTransferReplyPacket(unsigned char *buf, int len)
        : EvaPicInPacket(buf, len, NO_CRYPTOGRAPH), data(NULL)
{
}

EvaPicTransferReplyPacket::EvaPicTransferReplyPacket(const EvaPicTransferReplyPacket &rhs)
        : EvaPicInPacket(rhs)
{
        *this = rhs;
}

EvaPicTransferReplyPacket::~EvaPicTransferReplyPacket()
{
        if(data)
                delete data;
}

EvaPicTransferReplyPacket &EvaPicTransferReplyPacket::operator=(const EvaPicTransferReplyPacket &rhs)
{
        *((EvaPicInPacket *)this) = (EvaPicInPacket)rhs;
        sessionID = rhs.getSessionID();
        memcpy(md5, rhs.getMd5(), 16);
        memcpy(fileNameMd5, rhs.getFileNameMd5(), 16);
        fileName = rhs.getFileName();
        imageLength = rhs.getImageLength();
        
        dataLength = rhs.getDataLength();
        memcpy(data, rhs.getData(), dataLength);
        return *this;
}

void EvaPicTransferReplyPacket::parseBody()
{
        int pos=0;
        pos+=8; // ignore unknown 8 bytes
        
        unsigned int tmp4;
        memcpy(&tmp4, decryptedBuf+pos, 4); pos+=4;
        sessionID = ntohl(tmp4);
        
        pos+=4;  // unknown 4 bytes
        
        unsigned short tmp2;
        memcpy(&tmp2, decryptedBuf+pos, 2); pos+=2;
        unsigned short len = ntohs(tmp2);
        
        if(source != QQ_CLIENT_VERSION && !sequence){
                pos+=2;
                memcpy(md5, decryptedBuf+pos, 16); pos+=16;
                
                memcpy(fileNameMd5, decryptedBuf+pos, 16); pos+=16;
                
                memcpy(&tmp4, decryptedBuf+pos, 4); pos+=4;
                imageLength = ntohl(tmp4);
                
                unsigned short fileNameLength;
                memcpy(&tmp2, decryptedBuf+pos, 2); pos+=2;
                fileNameLength = ntohs(tmp2);
                
                char *str = new char[fileNameLength + 1];
                memcpy(str, decryptedBuf+pos, fileNameLength); pos+= fileNameLength;
                str[fileNameLength] = 0x00;
                fileName.assign(str);
                delete str;
        }else{
                data = new unsigned char[len];
                dataLength = len;
                
                memcpy(data, decryptedBuf+pos, len); pos+= len;
        }
}

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