/usr/include/tins/mpls.h is in libtins-dev 3.4-2+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright (c) 2016, Matias Fontanini
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#ifndef TINS_MPLS_H
#define TINS_MPLS_H
#include "pdu.h"
#include "endianness.h"
#include "macros.h"
#include "small_uint.h"
namespace Tins {
class ICMPExtension;
/**
* \class MPLS
* \brief Represents an MPLS PDU
*/
class TINS_API MPLS : public PDU {
public:
/**
* \brief This PDU's flag.
*/
static const PDU::PDUType pdu_flag = PDU::MPLS;
/**
* \brief Default constructor
*/
MPLS();
/**
* \brief Construct an MPLS layer from an ICMP extension
*
* This will use the extension's payload to build this packet.
* The extension's class and type are not checked.
*
*/
MPLS(const ICMPExtension& extension);
/**
* \brief Constructor from buffer
*/
MPLS(const uint8_t* buffer, uint32_t total_sz);
/**
* \brief Getter for the label field.
*/
small_uint<20> label() const {
return (Endian::be_to_host(header_.label_high) << 4) |
((header_.label_low_and_bottom >> 4) & 0xf);
}
/**
* \brief Getter for the bottom of the stack field.
*/
small_uint<1> bottom_of_stack() const {
return header_.label_low_and_bottom & 0x1;
}
/**
* \brief Getter for the ttl field.
*/
uint8_t ttl() const {
return header_.ttl;
}
/**
* \brief Setter for the label field
*
* \param value The new label field value
*/
void label(small_uint<20> value);
/**
* \brief Setter for the bottom of the stack field
*
* Note that if this MPLS layer is somewhere between an Ethernet and IP
* layers, the bottom of the stack field will be overriden and set
* automatically. You should only set this field when constructing ICMP
* extensions.
*
* \param value The new bottom of the stack field value
*/
void bottom_of_stack(small_uint<1> value);
/**
* \brief Setter for the ttl field
*
* \param value The new ttl field value
*/
void ttl(uint8_t value);
/**
* \brief Returns the MPLS frame's header length.
*
* \return The header's size.
* \sa PDU::header_size()
*/
uint32_t header_size() const;
/**
* \brief Getter for the PDU's type.
* \sa PDU::pdu_type
*/
PDUType pdu_type() const {
return pdu_flag;
}
/**
* \sa PDU::clone
*/
MPLS* clone() const {
return new MPLS(*this);
}
private:
TINS_BEGIN_PACK
struct mpls_header {
uint16_t label_high;
uint8_t label_low_and_bottom;
uint8_t ttl;
} TINS_END_PACK;
void write_serialization(uint8_t* buffer, uint32_t total_sz, const PDU* parent);
mpls_header header_;
};
} // Tins
#endif // TINS_MPLS_H
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