1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-or-later */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * SR-IPv6 implementation
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Author:
6*4882a593Smuzhiyun * David Lebrun <david.lebrun@uclouvain.be>
7*4882a593Smuzhiyun */
8*4882a593Smuzhiyun
9*4882a593Smuzhiyun #ifndef _NET_SEG6_H
10*4882a593Smuzhiyun #define _NET_SEG6_H
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include <linux/net.h>
13*4882a593Smuzhiyun #include <linux/ipv6.h>
14*4882a593Smuzhiyun #include <linux/seg6.h>
15*4882a593Smuzhiyun #include <linux/rhashtable-types.h>
16*4882a593Smuzhiyun
update_csum_diff4(struct sk_buff * skb,__be32 from,__be32 to)17*4882a593Smuzhiyun static inline void update_csum_diff4(struct sk_buff *skb, __be32 from,
18*4882a593Smuzhiyun __be32 to)
19*4882a593Smuzhiyun {
20*4882a593Smuzhiyun __be32 diff[] = { ~from, to };
21*4882a593Smuzhiyun
22*4882a593Smuzhiyun skb->csum = ~csum_partial((char *)diff, sizeof(diff), ~skb->csum);
23*4882a593Smuzhiyun }
24*4882a593Smuzhiyun
update_csum_diff16(struct sk_buff * skb,__be32 * from,__be32 * to)25*4882a593Smuzhiyun static inline void update_csum_diff16(struct sk_buff *skb, __be32 *from,
26*4882a593Smuzhiyun __be32 *to)
27*4882a593Smuzhiyun {
28*4882a593Smuzhiyun __be32 diff[] = {
29*4882a593Smuzhiyun ~from[0], ~from[1], ~from[2], ~from[3],
30*4882a593Smuzhiyun to[0], to[1], to[2], to[3],
31*4882a593Smuzhiyun };
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun skb->csum = ~csum_partial((char *)diff, sizeof(diff), ~skb->csum);
34*4882a593Smuzhiyun }
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun struct seg6_pernet_data {
37*4882a593Smuzhiyun struct mutex lock;
38*4882a593Smuzhiyun struct in6_addr __rcu *tun_src;
39*4882a593Smuzhiyun #ifdef CONFIG_IPV6_SEG6_HMAC
40*4882a593Smuzhiyun struct rhashtable hmac_infos;
41*4882a593Smuzhiyun #endif
42*4882a593Smuzhiyun };
43*4882a593Smuzhiyun
seg6_pernet(struct net * net)44*4882a593Smuzhiyun static inline struct seg6_pernet_data *seg6_pernet(struct net *net)
45*4882a593Smuzhiyun {
46*4882a593Smuzhiyun #if IS_ENABLED(CONFIG_IPV6)
47*4882a593Smuzhiyun return net->ipv6.seg6_data;
48*4882a593Smuzhiyun #else
49*4882a593Smuzhiyun return NULL;
50*4882a593Smuzhiyun #endif
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun extern int seg6_init(void);
54*4882a593Smuzhiyun extern void seg6_exit(void);
55*4882a593Smuzhiyun extern int seg6_iptunnel_init(void);
56*4882a593Smuzhiyun extern void seg6_iptunnel_exit(void);
57*4882a593Smuzhiyun extern int seg6_local_init(void);
58*4882a593Smuzhiyun extern void seg6_local_exit(void);
59*4882a593Smuzhiyun
60*4882a593Smuzhiyun extern bool seg6_validate_srh(struct ipv6_sr_hdr *srh, int len, bool reduced);
61*4882a593Smuzhiyun extern int seg6_do_srh_encap(struct sk_buff *skb, struct ipv6_sr_hdr *osrh,
62*4882a593Smuzhiyun int proto);
63*4882a593Smuzhiyun extern int seg6_do_srh_inline(struct sk_buff *skb, struct ipv6_sr_hdr *osrh);
64*4882a593Smuzhiyun extern int seg6_lookup_nexthop(struct sk_buff *skb, struct in6_addr *nhaddr,
65*4882a593Smuzhiyun u32 tbl_id);
66*4882a593Smuzhiyun #endif
67