include/net/seg6_hmac.h

   1 /*
   2  *  SR-IPv6 implementation
   3  *
   4  *  Author:
   5  *  David Lebrun <david.lebrun@uclouvain.be>
   6  *
   7  *
   8  *  This program is free software; you can redistribute it and/or
   9  *      modify it under the terms of the GNU General Public License
  10  *      as published by the Free Software Foundation; either version
  11  *      2 of the License, or (at your option) any later version.
  12  */
  13
  14 #ifndef _NET_SEG6_HMAC_H
  15 #define _NET_SEG6_HMAC_H
  16
  17 #include <net/flow.h>
  18 #include <net/ip6_fib.h>
  19 #include <net/sock.h>
  20 #include <linux/ip.h>
  21 #include <linux/ipv6.h>
  22 #include <linux/route.h>
  23 #include <net/seg6.h>
  24 #include <linux/seg6_hmac.h>
  25 #include <linux/rhashtable.h>
  26
  27 #define SEG6_HMAC_MAX_DIGESTSIZE        160
  28 #define SEG6_HMAC_RING_SIZE             256
  29
  30 struct seg6_hmac_info {
  31         struct rhash_head node;
  32         struct rcu_head rcu;
  33
  34         u32 hmackeyid;
  35         char secret[SEG6_HMAC_SECRET_LEN];
  36         u8 slen;
  37         u8 alg_id;
  38 };
  39
  40 struct seg6_hmac_algo {
  41         u8 alg_id;
  42         char name[64];
  43         struct crypto_shash * __percpu *tfms;
  44         struct shash_desc * __percpu *shashs;
  45 };
  46
  47 extern int seg6_hmac_compute(struct seg6_hmac_info *hinfo,
  48                              struct ipv6_sr_hdr *hdr, struct in6_addr *saddr,
  49                              u8 *output);
  50 extern struct seg6_hmac_info *seg6_hmac_info_lookup(struct net *net, u32 key);
  51 extern int seg6_hmac_info_add(struct net *net, u32 key,
  52                               struct seg6_hmac_info *hinfo);
  53 extern int seg6_hmac_info_del(struct net *net, u32 key);
  54 extern int seg6_push_hmac(struct net *net, struct in6_addr *saddr,
  55                           struct ipv6_sr_hdr *srh);
  56 extern bool seg6_hmac_validate_skb(struct sk_buff *skb);
  57 extern int seg6_hmac_init(void);
  58 extern void seg6_hmac_exit(void);
  59 extern int seg6_hmac_net_init(struct net *net);
  60 extern void seg6_hmac_net_exit(struct net *net);
  61
  62 #endif