package org.krakenapps.pcap.decoder.smb.comparser;
import org.krakenapps.pcap.decoder.netbios.NetBiosNameCodec;
import org.krakenapps.pcap.decoder.smb.SmbSession;
import org.krakenapps.pcap.decoder.smb.TransSubcommandMapper;
import org.krakenapps.pcap.decoder.smb.request.TransactionRequest;
import org.krakenapps.pcap.decoder.smb.response.TransactionResponse;
import org.krakenapps.pcap.decoder.smb.rr.ErrorClass;
import org.krakenapps.pcap.decoder.smb.rr.TransactionCommand;
import org.krakenapps.pcap.decoder.smb.structure.SmbData;
import org.krakenapps.pcap.decoder.smb.structure.SmbHeader;
import org.krakenapps.pcap.decoder.smb.structure.SmbStatus;
import org.krakenapps.pcap.decoder.smb.transparser.TransParser;
import org.krakenapps.pcap.util.Buffer;
import org.krakenapps.pcap.util.ByteOrderConverter;
import org.krakenapps.pcap.util.ChainBuffer;
//0x25
public class TransactionParser implements SmbDataParser{
@Override
public SmbData parseRequest(SmbHeader h , Buffer b , SmbSession session) {
TransactionRequest data = new TransactionRequest();
TransSubcommandMapper mapper = new TransSubcommandMapper();
byte []setup=null;
byte []parameter=null;
byte []pad1=null;
byte []pad2=null;
byte []buff=null;
data.setWordCount(b.get());
data.setTotalParameterCount(ByteOrderConverter.swap(b.getShort()));
data.setTotalDataCount(ByteOrderConverter.swap(b.getShort()));
data.setMaxParameterCount(ByteOrderConverter.swap(b.getShort()));
data.setMaxDataCount(ByteOrderConverter.swap(b.getShort()));
data.setMaxSetupCount(b.get());
data.setReserved1(b.get());
data.setFlags(ByteOrderConverter.swap(b.getShort()));
data.setTimeout(ByteOrderConverter.swap(b.getInt()));
data.setReserved2(ByteOrderConverter.swap(b.getShort()));
data.setParameterCount(ByteOrderConverter.swap(b.getShort()));
data.setParameterOffset(ByteOrderConverter.swap(b.getShort()));
data.setDataCount(ByteOrderConverter.swap(b.getShort()));
data.setDataOffset(ByteOrderConverter.swap(b.getShort()));
data.setSetupCount(b.get());
data.setReserved3(b.get());
setup = new byte[data.getSetupCount()*2];
b.gets(setup);
data.setSetup(setup);// short type align
data.setByteCount(ByteOrderConverter.swap(b.getShort()));
if(b.readableBytes() != data.getByteCount()){
data.setMalformed(true);
return data;
}
data.setName(NetBiosNameCodec.readOemName(b));
// following section is data section
if(data.getParameterCount() != 0){
pad1 = new byte[data.getParameterOffset()-b.position()];
if(pad1.length != 0){
b.gets(pad1);
data.setPad1(pad1);
}
parameter = new byte[data.getParameterCount()];
b.gets(parameter);
data.setTransParameters(parameter);
}
if(data.getDataCount() !=0){
pad2 = new byte[data.getDataOffset()-b.position()];
if(pad2.length != 0){
b.gets(pad2);
data.setPad2(pad2);
}
buff = new byte[data.getDataCount()];
b.gets(buff);
data.setTransData(buff);
}
// minus pad1,pad2,name,paramter length
Buffer setupBuffer = new ChainBuffer();
Buffer parameterBuffer = new ChainBuffer();
Buffer dataBuffer = new ChainBuffer();
setupBuffer.addLast(data.getSetup());
parameterBuffer.addLast(data.getTransParameters());
dataBuffer.addLast(data.getTransData());
if(setupBuffer.readableBytes() !=0){
setupBuffer.mark();
TransParser parser = mapper.getParser(TransactionCommand.parse(ByteOrderConverter.swap(setupBuffer.getShort())));
setupBuffer.rewind();
data.setTransactionData(parser.parseRequest( setupBuffer , parameterBuffer , dataBuffer));
}
data.setUpper(dataBuffer);
return data;
}
@Override
public SmbData parseResponse(SmbHeader h , Buffer b ,SmbSession session) {
TransactionResponse data = new TransactionResponse();
TransSubcommandMapper mapper = new TransSubcommandMapper();
SmbStatus status = h.getStatus();
if(status.getErrorClass() != ErrorClass.SUCCESS){
data.setWordCount(b.get());
data.setByteCount(ByteOrderConverter.swap(b.getShort()));
}
else
{
byte []setup;
byte []parameter;
byte []pad1;
byte []pad2;
byte []buff;
data.setWordCount(b.get());
//System.out.println(data.getWordCount());
data.setTotalParameterCount(ByteOrderConverter.swap(b.getShort()));
data.setTotalDataCount(ByteOrderConverter.swap(b.getShort()));
data.setReserved1(ByteOrderConverter.swap(b.getShort()));
data.setParameterCount(ByteOrderConverter.swap(b.getShort()));
data.setParameterOffset(ByteOrderConverter.swap(b.getShort()));
data.setParamterDisplacement(ByteOrderConverter.swap(b.getShort()));
data.setDataCount(ByteOrderConverter.swap(b.getShort()));
data.setDataOffset(ByteOrderConverter.swap(b.getShort()));
data.setDataDisplacement(ByteOrderConverter.swap(b.getShort()));
data.setSetupCount(b.get());
data.setReserved2(b.get());
setup = new byte[data.getSetupCount()*2];
b.gets(setup);
data.setSetup(setup);
data.setByteCount(ByteOrderConverter.swap(b.getShort()));
if(b.readableBytes() != data.getByteCount()){
data.setMalformed(true);
return data;
}
if(data.getParameterCount() != 0){
pad1 = new byte[data.getParameterOffset()-b.position()];
if(pad1.length != 0){
b.gets(pad1);
data.setPad1(pad1);
}
parameter = new byte[data.getParameterCount()];
b.gets(parameter);
data.setTransParameters(parameter);
}
if(data.getDataCount() !=0){
pad2 = new byte[data.getDataOffset()-b.position()];
if(pad2.length != 0){
b.gets(pad2);
data.setPad2(pad2);
}
buff = new byte[data.getDataCount()];
b.gets(buff);
data.setTransData(buff);
}
Buffer setupBuffer = new ChainBuffer();
Buffer parameterBuffer = new ChainBuffer();
Buffer dataBuffer = new ChainBuffer();
setupBuffer.addLast(data.getSetup());
parameterBuffer.addLast(data.getTransParameters());
dataBuffer.addLast(data.getTransData());
if(setupBuffer.readableBytes() + parameterBuffer.readableBytes() + dataBuffer.readableBytes() == 0){
return data;
}
//TransParser parser = mapper.getParser(TransactionCommand.parse(ByteOrderConverter.swap(setupBuffer.getShort())));
TransParser parser = mapper.getParser(session.getSessionTransCommand());
if(parser ==null){
return data;
}
data.setTransactionData(parser.parseResponse( setupBuffer , parameterBuffer , dataBuffer, session));
data.setUpper(dataBuffer);
}
return data;
}
}