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1ababeba DL |
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_H | |
15 | #define _NET_SEG6_H | |
16 | ||
915d7e5e DL |
17 | #include <linux/net.h> |
18 | #include <linux/ipv6.h> | |
6c8702c6 DL |
19 | #include <net/lwtunnel.h> |
20 | #include <linux/seg6.h> | |
bf355b8d | 21 | #include <linux/rhashtable.h> |
915d7e5e | 22 | |
1ababeba DL |
23 | static inline void update_csum_diff4(struct sk_buff *skb, __be32 from, |
24 | __be32 to) | |
25 | { | |
26 | __be32 diff[] = { ~from, to }; | |
27 | ||
28 | skb->csum = ~csum_partial((char *)diff, sizeof(diff), ~skb->csum); | |
29 | } | |
30 | ||
31 | static inline void update_csum_diff16(struct sk_buff *skb, __be32 *from, | |
32 | __be32 *to) | |
33 | { | |
34 | __be32 diff[] = { | |
35 | ~from[0], ~from[1], ~from[2], ~from[3], | |
36 | to[0], to[1], to[2], to[3], | |
37 | }; | |
38 | ||
39 | skb->csum = ~csum_partial((char *)diff, sizeof(diff), ~skb->csum); | |
40 | } | |
41 | ||
915d7e5e DL |
42 | struct seg6_pernet_data { |
43 | struct mutex lock; | |
44 | struct in6_addr __rcu *tun_src; | |
bf355b8d DL |
45 | #ifdef CONFIG_IPV6_SEG6_HMAC |
46 | struct rhashtable hmac_infos; | |
47 | #endif | |
915d7e5e DL |
48 | }; |
49 | ||
50 | static inline struct seg6_pernet_data *seg6_pernet(struct net *net) | |
51 | { | |
52 | return net->ipv6.seg6_data; | |
53 | } | |
54 | ||
55 | extern int seg6_init(void); | |
56 | extern void seg6_exit(void); | |
6c8702c6 DL |
57 | extern int seg6_iptunnel_init(void); |
58 | extern void seg6_iptunnel_exit(void); | |
59 | ||
60 | extern bool seg6_validate_srh(struct ipv6_sr_hdr *srh, int len); | |
915d7e5e | 61 | |
1ababeba | 62 | #endif |