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 63