1 /* SPDX-License-Identifier: GPL-2.0-or-later */
3 * SR-IPv6 implementation
6 * David Lebrun <david.lebrun@uclouvain.be>
12 #include <linux/net.h>
13 #include <linux/ipv6.h>
14 #include <linux/seg6.h>
15 #include <linux/rhashtable-types.h>
17 static inline void update_csum_diff4(struct sk_buff *skb, __be32 from,
20 __be32 diff[] = { ~from, to };
22 skb->csum = ~csum_partial((char *)diff, sizeof(diff), ~skb->csum);
25 static inline void update_csum_diff16(struct sk_buff *skb, __be32 *from,
29 ~from[0], ~from[1], ~from[2], ~from[3],
30 to[0], to[1], to[2], to[3],
33 skb->csum = ~csum_partial((char *)diff, sizeof(diff), ~skb->csum);
36 struct seg6_pernet_data {
38 struct in6_addr __rcu *tun_src;
39 #ifdef CONFIG_IPV6_SEG6_HMAC
40 struct rhashtable hmac_infos;
44 static inline struct seg6_pernet_data *seg6_pernet(struct net *net)
46 #if IS_ENABLED(CONFIG_IPV6)
47 return net->ipv6.seg6_data;
53 extern int seg6_init(void);
54 extern void seg6_exit(void);
55 extern int seg6_iptunnel_init(void);
56 extern void seg6_iptunnel_exit(void);
57 extern int seg6_local_init(void);
58 extern void seg6_local_exit(void);
60 extern bool seg6_validate_srh(struct ipv6_sr_hdr *srh, int len, bool reduced);
61 extern int seg6_do_srh_encap(struct sk_buff *skb, struct ipv6_sr_hdr *osrh,
63 extern int seg6_do_srh_inline(struct sk_buff *skb, struct ipv6_sr_hdr *osrh);
64 extern int seg6_lookup_nexthop(struct sk_buff *skb, struct in6_addr *nhaddr,