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6b55790e73
This reduces the redundant implementations of checksum calculation to one generic implementation, makes the checksum interface conform over all protocols, and brings performance optimizations. For instance, the checksum is now calculated directly in big endian which saves us most of the previously done byte-re-ordering. Issue #2775
36 lines
1.2 KiB
C++
36 lines
1.2 KiB
C++
/*
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* \brief Computing the Internet Checksum (conforms to RFC 1071)
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* \author Martin Stein
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* \date 2018-03-23
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*/
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/*
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* Copyright (C) 2018 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU Affero General Public License version 3.
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*/
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#ifndef _NET__INTERNET_CHECKSUM_H_
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#define _NET__INTERNET_CHECKSUM_H_
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/* Genode includes */
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#include <net/ipv4.h>
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#include <base/stdint.h>
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namespace Net {
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Genode::uint16_t internet_checksum(Genode::uint16_t const *addr,
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Genode::size_t size,
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Genode::addr_t init_sum = 0);
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Genode::uint16_t internet_checksum_pseudo_ip(Genode::uint16_t const *addr,
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Genode::size_t size,
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Genode::uint16_t size_be,
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Ipv4_packet::Protocol ip_prot,
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Ipv4_address &ip_src,
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Ipv4_address &ip_dst);
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}
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#endif /* _NET__INTERNET_CHECKSUM_H_ */
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