aboutgitcodebugslistschat
path: root/checksum.h
blob: 2a5e9153cc4294a0d60096ca6135a08e7705a0a8 (plain) (tree)
1
2
3
4
5
6
7
8
9




                                              


                  
              
               

                
                                              
                                 
                                                                    

                                                                       
                                                                     


                                                                          


                                                                           

                                                          

                       
/* SPDX-License-Identifier: AGPL-3.0-or-later
 * Copyright (c) 2021 Red Hat GmbH
 * Author: Stefano Brivio <sbrivio@redhat.com>
 */

#ifndef CHECKSUM_H
#define CHECKSUM_H

struct udphdr;
struct icmphdr;
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);
void csum_udp4(struct udphdr *udp4hr, in_addr_t saddr, in_addr_t daddr,
	       const void *payload, size_t len);
void csum_icmp4(struct icmphdr *ih, const void *payload, size_t len);
void csum_udp6(struct udphdr *udp6hr,
	       const struct in6_addr *saddr, const struct in6_addr *daddr,
	       const void *payload, size_t len);
void csum_icmp6(struct icmp6hdr *icmp6hr,
		const struct in6_addr *saddr, const struct in6_addr *daddr,
		const void *payload, size_t len);
void csum_tcp4(struct iphdr *iph);
uint16_t csum(const void *buf, size_t len, uint32_t init);

#endif /* CHECKSUM_H */