/usr/include/tins/internals.h is in libtins-dev 3.4-2build1.
This file is owned by root:root, with mode 0o644.
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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_INTERNALS_H
#define TINS_INTERNALS_H
#if TINS_IS_CXX11
#include <type_traits>
#endif
#include <sstream>
#include <string>
#include <stdint.h>
#include "constants.h"
#include "pdu.h"
#include "hw_address.h"
/**
* \cond
*/
namespace Tins {
namespace Memory {
class InputMemoryStream;
} // Memory
class IPv4Address;
class IPv6Address;
class ICMPExtensionsStructure;
namespace Internals {
template<size_t n>
class byte_array {
public:
typedef uint8_t* iterator;
typedef const uint8_t* const_iterator;
byte_array() {
std::fill(begin(), end(), 0);
}
template<typename InputIterator>
byte_array(InputIterator start, InputIterator last) {
std::copy(start, last, data);
}
template<typename InputIterator>
byte_array(InputIterator start) {
std::copy(start, n, data);
}
uint8_t& operator[](size_t i) {
return data[i];
}
uint8_t operator[](size_t i) const{
return data[i];
}
iterator begin() {
return data;
}
iterator end() {
return data + n;
}
const_iterator begin() const {
return data;
}
const_iterator end() const {
return data + n;
}
size_t size() const {
return n;
}
private:
uint8_t data[n];
};
void skip_line(std::istream& input);
bool from_hex(const std::string& str, uint32_t& result);
template<bool, typename T = void>
struct enable_if {
typedef T type;
};
template<typename T>
struct enable_if<false, T> {
};
PDU* pdu_from_flag(Constants::Ethernet::e flag, const uint8_t* buffer,
uint32_t size, bool rawpdu_on_no_match = true);
PDU* pdu_from_flag(Constants::IP::e flag, const uint8_t* buffer,
uint32_t size, bool rawpdu_on_no_match = true);
PDU* pdu_from_dlt_flag(int flag, const uint8_t* buffer,
uint32_t size, bool rawpdu_on_no_match = true);
PDU* pdu_from_flag(PDU::PDUType type, const uint8_t* buffer, uint32_t size);
Constants::Ethernet::e pdu_flag_to_ether_type(PDU::PDUType flag);
PDU::PDUType ether_type_to_pdu_flag(Constants::Ethernet::e flag);
Constants::IP::e pdu_flag_to_ip_type(PDU::PDUType flag);
PDU::PDUType ip_type_to_pdu_flag(Constants::IP::e flag);
uint32_t get_padded_icmp_inner_pdu_size(const PDU* inner_pdu, uint32_t pad_alignment);
void try_parse_icmp_extensions(Memory::InputMemoryStream& stream,
uint32_t payload_length, ICMPExtensionsStructure& extensions);
template<typename T>
bool increment_buffer(T& addr) {
typename T::iterator it = addr.end() - 1;
while (it >= addr.begin() && *it == 0xff) {
*it = 0;
--it;
}
// reached end
if (it < addr.begin()) {
return true;
}
(*it)++;
return false;
}
template<typename T>
bool decrement_buffer(T& addr) {
typename T::iterator it = addr.end() - 1;
while (it >= addr.begin() && *it == 0) {
*it = 0xff;
--it;
}
// reached end
if (it < addr.begin()) {
return true;
}
(*it)--;
return false;
}
bool increment(IPv4Address& addr);
bool increment(IPv6Address& addr);
bool decrement(IPv4Address& addr);
bool decrement(IPv6Address& addr);
template<size_t n>
bool increment(HWAddress<n>& addr) {
return increment_buffer(addr);
}
template<size_t n>
bool decrement(HWAddress<n>& addr) {
return decrement_buffer(addr);
}
// Compares sequence numbers as defined by RFC 1982.
int seq_compare(uint32_t seq1, uint32_t seq2);
IPv4Address last_address_from_mask(IPv4Address addr, IPv4Address mask);
IPv6Address last_address_from_mask(IPv6Address addr, const IPv6Address& mask);
template<size_t n>
HWAddress<n> last_address_from_mask(HWAddress<n> addr, const HWAddress<n>& mask) {
typename HWAddress<n>::iterator addr_iter = addr.begin();
for (typename HWAddress<n>::const_iterator it = mask.begin(); it != mask.end(); ++it, ++addr_iter) {
*addr_iter = *addr_iter | ~*it;
}
return addr;
}
inline bool is_dot3(const uint8_t* ptr, size_t sz) {
return (sz >= 13 && ptr[12] < 8);
}
template<typename T>
struct is_unsigned_integral {
static const bool value = false;
};
template<>
struct is_unsigned_integral<uint8_t> {
static const bool value = true;
};
template<>
struct is_unsigned_integral<uint16_t> {
static const bool value = true;
};
template<>
struct is_unsigned_integral<uint32_t> {
static const bool value = true;
};
template<>
struct is_unsigned_integral<uint64_t> {
static const bool value = true;
};
#if TINS_IS_CXX11 && !defined(_MSC_VER)
// Template metaprogramming trait to determine if a functor can accept another parameter as an argument
template <typename T, typename P, typename=void>
struct accepts_type : std::false_type { };
template <typename T, typename P>
struct accepts_type<T, P,
typename std::enable_if<
std::is_same< decltype( std::declval<T>()(std::declval<P>()) ), bool>::value
>::type
> : std::true_type { };
// use enable_if to invoke the Packet&& version of the sniff_loop handler if possible - otherwise fail to old behavior
template <typename Functor, typename Packet>
bool invoke_loop_cb(Functor& f, Packet& p, typename std::enable_if<accepts_type<Functor, Packet>::value, bool>::type* = 0) {
return f(std::move(p));
}
template <typename Functor, typename Packet>
bool invoke_loop_cb(Functor& f, Packet& p, typename std::enable_if<!accepts_type<Functor, Packet>::value && accepts_type<Functor, Packet&>::value, bool>::type* = 0) {
return f(p);
}
template <typename Functor, typename Packet>
bool invoke_loop_cb(Functor& f, Packet& p, typename std::enable_if<!accepts_type<Functor, Packet>::value && !accepts_type<Functor, Packet&>::value, bool>::type* = 0) {
return f(*p.pdu());
}
#endif
} // namespace Internals
} // namespace Tins
/**
* \endcond
*/
#endif
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