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
25 struct 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
35 struct 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
42 extern int seg6_hmac_compute(struct seg6_hmac_info *hinfo,
43 struct ipv6_sr_hdr *hdr, struct in6_addr *saddr,
44 u8 *output);
45 extern struct seg6_hmac_info *seg6_hmac_info_lookup(struct net *net, u32 key);
46 extern int seg6_hmac_info_add(struct net *net, u32 key,
47 struct seg6_hmac_info *hinfo);
48 extern int seg6_hmac_info_del(struct net *net, u32 key);
49 extern int seg6_push_hmac(struct net *net, struct in6_addr *saddr,
50 struct ipv6_sr_hdr *srh);
51 extern bool seg6_hmac_validate_skb(struct sk_buff *skb);
52 #ifdef CONFIG_IPV6_SEG6_HMAC
53 extern int seg6_hmac_init(void);
54 extern void seg6_hmac_exit(void);
55 extern int seg6_hmac_net_init(struct net *net);
56 extern void seg6_hmac_net_exit(struct net *net);
57 #else
58 static inline int seg6_hmac_init(void) { return 0; }
59 static inline void seg6_hmac_exit(void) {}
60 static inline int seg6_hmac_net_init(struct net *net) { return 0; }
61 static inline void seg6_hmac_net_exit(struct net *net) {}
62 #endif
63
64 #endif
65
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.