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Code Issues Releases Wiki Activity

Move checksum utils into their own file

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This commit is contained in:
Matias Fontanini
2017-04-30 11:59:02 -07:00
parent 110adc58dc
commit 89202c5dd5
13 changed files with 252 additions and 146 deletions
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1
include/tins/CMakeLists.txt
View File

@@ -7,3 +7,4 @@ INSTALL(
ADD_SUBDIRECTORY(dot11)
ADD_SUBDIRECTORY(tcp_ip)
ADD_SUBDIRECTORY(detail)
ADD_SUBDIRECTORY(utils)

58
include/tins/utils.h
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@@ -39,6 +39,7 @@
#include "ipv6_address.h"
#include "pdu.h"
#include "detail/type_traits.h"
#include "utils/checksum_utils.h"
// Fix for Windows interface define on combaseapi.h
#undef interface
@@ -215,13 +216,6 @@ TINS_API std::vector<RouteEntry> route_entries();
*/
TINS_API std::vector<Route6Entry> route6_entries();
/** \brief Returns the 32 bit crc of the given buffer.
*
* \param data The input buffer.
* \param data_size The size of the input buffer.
*/
TINS_API uint32_t crc32(const uint8_t* data, uint32_t data_size);
/**
* \brief Converts a channel number to its mhz representation.
* \param channel The channel number.
@@ -243,56 +237,6 @@ TINS_API uint16_t mhz_to_channel(uint16_t mhz);
*/
TINS_API std::string to_string(PDU::PDUType pduType);
/**
* \brief Does the 16 bits sum of all 2 bytes elements between start and end.
*
* This is the checksum used by IP, UDP and TCP. If there's and odd number of
* bytes, the last one is padded and added to the checksum.
* \param start The pointer to the start of the buffer.
* \param end The pointer to the end of the buffer(excluding the last element).
* \return Returns the checksum between start and end (non inclusive)
* in network endian
*/
TINS_API uint32_t do_checksum(const uint8_t* start, const uint8_t* end);
/**
* \brief Computes the 16 bit sum of the input buffer.
*
* If there's and odd number of bytes in the buffer, the last one is padded and
* added to the checksum.
* \param start The pointer to the start of the buffer.
* \param end The pointer to the end of the buffer(excluding the last element).
* \return Returns the checksum between start and end (non inclusive)
* in network endian
*/
TINS_API uint16_t sum_range(const uint8_t* start, const uint8_t* end);
/** \brief Performs the pseudo header checksum used in TCP and UDP PDUs.
*
* \param source_ip The source ip address.
* \param dest_ip The destination ip address.
* \param len The length to be included in the pseudo header.
* \param flag The flag to use in the protocol field of the pseudo header.
* \return The pseudo header checksum.
*/
TINS_API uint32_t pseudoheader_checksum(IPv4Address source_ip,
IPv4Address dest_ip,
uint16_t len,
uint16_t flag);
/** \brief Performs the pseudo header checksum used in TCP and UDP PDUs.
*
* \param source_ip The source ip address.
* \param dest_ip The destination ip address.
* \param len The length to be included in the pseudo header.
* \param flag The flag to use in the protocol field of the pseudo header.
* \return The pseudo header checksum.
*/
TINS_API uint32_t pseudoheader_checksum(IPv6Address source_ip,
IPv6Address dest_ip,
uint16_t len,
uint16_t flag);
template <typename T>
struct is_pdu {
template <typename U>

6
include/tins/utils/CMakeLists.txt Normal file
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@@ -0,0 +1,6 @@
FILE(GLOB INCLUDE_FILES "*.h")
INSTALL(
FILES ${INCLUDE_FILES}
DESTINATION include/tins/utils
COMPONENT Headers
)

106
include/tins/utils/checksum_utils.h Normal file
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@@ -0,0 +1,106 @@
/*
* Copyright (c) 2017, 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_CHECKSUM_UTILS_H
#define TINS_CHECKSUM_UTILS_H
#include <stdint.h>
#include "../macros.h"
namespace Tins {
class IPv4Address;
class IPv6Address;
namespace Utils {
/**
* \brief Does the 16 bits sum of all 2 bytes elements between start and end.
*
* This is the checksum used by IP, UDP and TCP. If there's and odd number of
* bytes, the last one is padded and added to the checksum.
* \param start The pointer to the start of the buffer.
* \param end The pointer to the end of the buffer(excluding the last element).
* \return Returns the checksum between start and end (non inclusive)
* in network endian
*/
TINS_API uint32_t do_checksum(const uint8_t* start, const uint8_t* end);
/**
* \brief Computes the 16 bit sum of the input buffer.
*
* If there's and odd number of bytes in the buffer, the last one is padded and
* added to the checksum.
* \param start The pointer to the start of the buffer.
* \param end The pointer to the end of the buffer(excluding the last element).
* \return Returns the checksum between start and end (non inclusive)
* in network endian
*/
TINS_API uint16_t sum_range(const uint8_t* start, const uint8_t* end);
/**
* \brief Performs the pseudo header checksum used in TCP and UDP PDUs.
*
* \param source_ip The source ip address.
* \param dest_ip The destination ip address.
* \param len The length to be included in the pseudo header.
* \param flag The flag to use in the protocol field of the pseudo header.
* \return The pseudo header checksum.
*/
TINS_API uint32_t pseudoheader_checksum(IPv4Address source_ip,
IPv4Address dest_ip,
uint16_t len,
uint16_t flag);
/**
* \brief Performs the pseudo header checksum used in TCP and UDP PDUs.
*
* \param source_ip The source ip address.
* \param dest_ip The destination ip address.
* \param len The length to be included in the pseudo header.
* \param flag The flag to use in the protocol field of the pseudo header.
* \return The pseudo header checksum.
*/
TINS_API uint32_t pseudoheader_checksum(IPv6Address source_ip,
IPv6Address dest_ip,
uint16_t len,
uint16_t flag);
/**
* \brief Returns the 32 bit crc of the given buffer.
*
* \param data The input buffer.
* \param data_size The size of the input buffer.
*/
TINS_API uint32_t crc32(const uint8_t* data, uint32_t data_size);
} // Utils
} // Tins
#endif // TINS_CHECKSUM_UTILS_H