1/* SPDX-License-Identifier: GPL-2.0-or-later */
2/*
3 *  SR-IPv6 implementation
4 *
5 *  Author:
6 *  David Lebrun <david.lebrun@uclouvain.be>
7 */
8
9#ifndef _NET_SEG6_HMAC_H
10#define _NET_SEG6_HMAC_H
11
12#include <net/flow.h>
13#include <net/ip6_fib.h>
14#include <net/sock.h>
15#include <linux/ip.h>
16#include <linux/ipv6.h>
17#include <linux/route.h>
18#include <net/seg6.h>
19#include <linux/seg6_hmac.h>
20#include <linux/rhashtable-types.h>
21
22#define SEG6_HMAC_MAX_DIGESTSIZE	160
23#define SEG6_HMAC_RING_SIZE		256
24
25struct seg6_hmac_info {
26	struct rhash_head node;
27	struct rcu_head rcu;
28
29	u32 hmackeyid;
30	char secret[SEG6_HMAC_SECRET_LEN];
31	u8 slen;
32	u8 alg_id;
33};
34
35struct seg6_hmac_algo {
36	u8 alg_id;
37	char name[64];
38	struct crypto_shash * __percpu *tfms;
39	struct shash_desc * __percpu *shashs;
40};
41
42extern int seg6_hmac_compute(struct seg6_hmac_info *hinfo,
43			     struct ipv6_sr_hdr *hdr, struct in6_addr *saddr,
44			     u8 *output);
45extern struct seg6_hmac_info *seg6_hmac_info_lookup(struct net *net, u32 key);
46extern int seg6_hmac_info_add(struct net *net, u32 key,
47			      struct seg6_hmac_info *hinfo);
48extern int seg6_hmac_info_del(struct net *net, u32 key);
49extern int seg6_push_hmac(struct net *net, struct in6_addr *saddr,
50			  struct ipv6_sr_hdr *srh);
51extern bool seg6_hmac_validate_skb(struct sk_buff *skb);
52extern int seg6_hmac_init(void);
53extern void seg6_hmac_exit(void);
54extern int seg6_hmac_net_init(struct net *net);
55extern void seg6_hmac_net_exit(struct net *net);
56
57#endif
58