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Linux/include/net/seg6_hmac.h

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  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 extern int seg6_hmac_init(void);
 53 extern void seg6_hmac_exit(void);
 54 extern int seg6_hmac_net_init(struct net *net);
 55 extern void seg6_hmac_net_exit(struct net *net);
 56 
 57 #endif
 58 

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