package org.krakenapps.pcap.decoder.smb.udp;
import org.krakenapps.pcap.decoder.netbios.NetBiosNameCodec;
import org.krakenapps.pcap.decoder.smb.SmbSession;
import org.krakenapps.pcap.decoder.smb.UdpTransSubcommandMapper;
import org.krakenapps.pcap.decoder.smb.comparser.SmbDataParser;
import org.krakenapps.pcap.decoder.smb.rr.UdpTransactionCommand;
import org.krakenapps.pcap.decoder.smb.structure.SmbData;
import org.krakenapps.pcap.decoder.smb.structure.SmbHeader;
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 UdpTransactionParser implements SmbDataParser{
@Override
public SmbData parseRequest(SmbHeader h , Buffer b , SmbSession session) {
UdpTransaction data = new UdpTransaction();
UdpTransSubcommandMapper mapper = new UdpTransSubcommandMapper();
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(UdpTransactionCommand.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) {
//do nothing
return null;
}
}