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//------------------------------------------------------------------------------
// Author: Andrey Kuznetsov
// Description: Helpers for parsing NetBIOS structures.
// Copyright (c) 2014 EPAM Systems
//------------------------------------------------------------------------------
/*
This file is part of Nfstrace.
Nfstrace 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, version 2 of the License.
Nfstrace 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 Nfstrace. If not, see <http://www.gnu.org/licenses/>.
*/
//------------------------------------------------------------------------------
#ifndef NETBIOS_HEADER_H
#define NETBIOS_HEADER_H
//------------------------------------------------------------------------------
#include <cstdint>
#include <cstdlib>
//------------------------------------------------------------------------------
namespace NST
{
namespace protocols
{
namespace NetBIOS
{
/*! \class NetBIOS message header in SMB-direct case
*/
struct RawMessageHeader
{
uint8_t _start; //!< In SMB direct always 0x00
uint8_t _;
uint16_t length; //!< Packet length
} __attribute__((__packed__));
/*! \class NetBIOS message header wrapper
*/
struct MessageHeader : private RawMessageHeader
{
int8_t start() const;
size_t len() const;
};
/*! Check is data valid NetBIOS message's header and return header or nullptr
* \param data - raw packet data
* \return pointer to input data which is casted to header structure or nullptr (if it is not valid header)
*/
inline const struct MessageHeader* get_header(const uint8_t* data)
{
const MessageHeader* header(reinterpret_cast<const MessageHeader*>(data));
if(header->start() == 0x00)
{
return header;
}
return nullptr;
}
} // namespace NetBIOS
} // namespace protocols
} // namespace NST
//------------------------------------------------------------------------------
#endif // NETBIOS_HEADER_H
//------------------------------------------------------------------------------
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