bool L2Login_PlayFail::create( L2_VERSION ver /*= L2_VERSION_T1*/ )
{
UNREFERENCED_PARAMETER(ver);
setPacketType( 0x06 );
writeUChar( p_reasonCode );
return true;
}
bool L2Game_RequestUserCommand::create( unsigned int commandID )
{
writeReset();
writeUChar( 0xB3 );
writeUInt( commandID );
return true;
}
void writeByteList( TAThread thread, int size, unsigned char * list, int needDealloc ) {
writeInt( thread, size );
if ( size >= 0 ) {
int i;
for ( i = 0; i < size; i++ ) { writeUChar( thread, list[ i ] ); }
if ( needDealloc != 0 ) { ta_dealloc_memory( list ); }
}
}
bool Packet::appendChecksum( bool append4bytes )
{
unsigned char *raw = b.getBytesPtr();
int size = (int)this->real_size;
unsigned int chksum = 0;
int count = size;
unsigned int ecx = 0;
int i = 0;
int offset = 2;
for( i = offset; i<count; i+=4 )
{
ecx = (raw[i]) & 0x000000ff;
ecx |= (raw[i+1] << 0x08) & 0x0000ff00;
ecx |= (raw[i+2] << 0x10) & 0x00ff0000;
ecx |= (raw[i+3] << 0x18) & 0xff000000;
chksum ^= ecx;
}
ecx = raw[i] & 0x000000ff;
ecx |= raw[i+1] << 0x08 & 0x0000ff00;
ecx |= raw[i+2] << 0x10 & 0x00ff0000;
ecx |= raw[i+3] << 0x18 & 0xff000000;
writeUChar( (unsigned char)((chksum) & 0xff) );
writeUChar( (unsigned char)((chksum >> 0x08) & 0xff) );
writeUChar( (unsigned char)((chksum >> 0x10) & 0xff) );
writeUChar( (unsigned char)((chksum >> 0x18) & 0xff) );
if( append4bytes )
{
writeUChar( 0x00 );
writeUChar( 0x00 );
writeUChar( 0x00 );
writeUChar( 0x00 );
}
return true;
}
bool Packet::appendMore8Bytes()
{
int i;
for( i=0; i<8; i++ ) writeUChar( 0x00 );
return true;
}
bool L2LoginPacket::appendChecksum( bool append4bytes )
{
unsigned char *raw = b.getBytesPtr();
int size = (int)this->real_size;
unsigned int chksum = 0;
int count = size; // size-4; // we do not reserve space for checksum
unsigned int ecx = 0;
int i = 0;
int offset = 2;
#ifdef L2LOGINP_DEBUGOUT_CHKSUM
printf( "L2LoginPacket::appendChecksum(): for( i=%d; i<%d; i+=4)\n",
offset, count );
#endif // L2LOGINP_DEBUGOUT_CHKSUM
for( i = offset; i<count; i+=4 )
{
ecx = (raw[i]) & 0x000000ff;
ecx |= (raw[i+1] << 0x08) & 0x0000ff00;
ecx |= (raw[i+2] << 0x10) & 0x00ff0000;
ecx |= (raw[i+3] << 0x18) & 0xff000000;
chksum ^= ecx;
}
ecx = raw[i] & 0x000000ff;
ecx |= raw[i+1] << 0x08 & 0x0000ff00;
ecx |= raw[i+2] << 0x10 & 0x00ff0000;
ecx |= raw[i+3] << 0x18 & 0xff000000;
// write chksum to end of packet
/*/// L2J style :)
raw[i] = (unsigned char)((chksum) & 0xff);
raw[i+1] = (unsigned char)((chksum >> 0x08) & 0xff);
raw[i+2] = (unsigned char)((chksum >> 0x10) & 0xff);
raw[i+3] = (unsigned char)((chksum >> 0x18) & 0xff);
*/
//this->write_ptr = i+4;
#ifdef L2LOGINP_DEBUGOUT_CHKSUM
printf( "L2LoginPacket::appendChecksum(): writing chksum [%04X] at indexes [%d..%d]\n",
chksum, this->write_ptr, this->write_ptr+3 );
#endif // L2LOGINP_DEBUGOUT_CHKSUM
writeUChar( (unsigned char)((chksum) & 0xff) );
writeUChar( (unsigned char)((chksum >> 0x08) & 0xff) );
writeUChar( (unsigned char)((chksum >> 0x10) & 0xff) );
writeUChar( (unsigned char)((chksum >> 0x18) & 0xff) );
// Should we also automatically append 4 0x00 symbols to packet?
// Before calling appendChecksum(), packet is considered to be
// aligned at 8-byte border, so adding 4 bytes of checksum
// breaks this alignment. And adding more 4 zero bytes will
// resore 8-byte border alignment.
// But sometimes this adding is not necessary, for example,
// when encoding packet from Login Server to Client.
if( append4bytes )
{
writeUChar( 0x00 );
writeUChar( 0x00 );
writeUChar( 0x00 );
writeUChar( 0x00 );
}
return true;
}