35 lines
1.2 KiB
C
35 lines
1.2 KiB
C
/*
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* Copyright 2011 Daniel Drown
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* checksum.h - checksum functions
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*/
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#ifndef __CHECKSUM_H__
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#define __CHECKSUM_H__
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#include <netinet/ip.h>
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#include <netinet/ip6.h>
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#include <stdint.h>
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uint32_t ip_checksum_add(uint32_t current, const void* data, int len);
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uint16_t ip_checksum_finish(uint32_t temp_sum);
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uint16_t ip_checksum(const void* data, int len);
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uint32_t ipv6_pseudo_header_checksum(const struct ip6_hdr* ip6, uint32_t len, uint8_t protocol);
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uint32_t ipv4_pseudo_header_checksum(const struct iphdr* ip, uint16_t len);
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uint16_t ip_checksum_adjust(uint16_t checksum, uint32_t old_hdr_sum, uint32_t new_hdr_sum);
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#endif /* __CHECKSUM_H__ */
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