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6879df6b58
The IP checksum algorithm yields identical results regardless of whether arithmetic little-endian or big-endian, but in practice OVS only passes in big-endian data, so it seems reasonable to annotate these functions that way.
33 lines
1.1 KiB
C
33 lines
1.1 KiB
C
/*
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* Copyright (c) 2008, 2011 Nicira Networks.
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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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#ifndef CSUM_H
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#define CSUM_H 1
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#include <stddef.h>
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#include <stdint.h>
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#include "openvswitch/types.h"
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ovs_be16 csum(const void *, size_t);
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uint32_t csum_add16(uint32_t partial, ovs_be16);
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uint32_t csum_add32(uint32_t partial, ovs_be32);
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uint32_t csum_continue(uint32_t partial, const void *, size_t);
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ovs_be16 csum_finish(uint32_t partial);
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ovs_be16 recalc_csum16(ovs_be16 old_csum, ovs_be16 old_u16, ovs_be16 new_u16);
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ovs_be16 recalc_csum32(ovs_be16 old_csum, ovs_be32 old_u32, ovs_be32 new_u32);
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#endif /* csum.h */
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