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| | /* SPDX-License-Identifier: GPL-2.0-or-later
* Copyright (c) 2021 Red Hat GmbH
* Author: Stefano Brivio <sbrivio@redhat.com>
*/
#ifndef CHECKSUM_H
#define CHECKSUM_H
struct iphdr;
struct udphdr;
struct icmphdr;
struct ipv6hdr;
struct icmp6hdr;
uint32_t sum_16b(const void *buf, size_t len);
uint16_t csum_fold(uint32_t sum);
uint16_t csum_unaligned(const void *buf, size_t len, uint32_t init);
uint16_t csum_ip4_header(const struct iphdr *ip4h);
uint32_t proto_ipv4_header_psum(struct iphdr *ip4h, uint8_t proto);
void csum_icmp4(struct icmphdr *ih, const void *payload, size_t len);
uint32_t proto_ipv6_header_psum(struct ipv6hdr *ip6h, uint8_t proto);
void csum_icmp6(struct icmp6hdr *icmp6hr,
const struct in6_addr *saddr, const struct in6_addr *daddr,
const void *payload, size_t len);
uint32_t csum_unfolded(const void *buf, size_t len, uint32_t init);
uint16_t csum(const void *buf, size_t len, uint32_t init);
uint16_t csum_iov(struct iovec *iov, unsigned int n, uint32_t init);
#endif /* CHECKSUM_H */
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