include/net/seg6_hmac.h

   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