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Linux/include/net/seg6_hmac.h

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  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-types.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
 63 

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