2 * SR-IPv6 implementation
5 * David Lebrun <david.lebrun@uclouvain.be>
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.
17 #include <linux/net.h>
18 #include <linux/ipv6.h>
19 #include <net/lwtunnel.h>
20 #include <linux/seg6.h>
21 #include <linux/rhashtable-types.h>
23 static inline void update_csum_diff4(struct sk_buff *skb, __be32 from,
26 __be32 diff[] = { ~from, to };
28 skb->csum = ~csum_partial((char *)diff, sizeof(diff), ~skb->csum);
31 static inline void update_csum_diff16(struct sk_buff *skb, __be32 *from,
35 ~from[0], ~from[1], ~from[2], ~from[3],
36 to[0], to[1], to[2], to[3],
39 skb->csum = ~csum_partial((char *)diff, sizeof(diff), ~skb->csum);
42 struct seg6_pernet_data {
44 struct in6_addr __rcu *tun_src;
45 #ifdef CONFIG_IPV6_SEG6_HMAC
46 struct rhashtable hmac_infos;
50 static inline struct seg6_pernet_data *seg6_pernet(struct net *net)
52 #if IS_ENABLED(CONFIG_IPV6)
53 return net->ipv6.seg6_data;
59 extern int seg6_init(void);
60 extern void seg6_exit(void);
61 extern int seg6_iptunnel_init(void);
62 extern void seg6_iptunnel_exit(void);
63 extern int seg6_local_init(void);
64 extern void seg6_local_exit(void);
66 extern bool seg6_validate_srh(struct ipv6_sr_hdr *srh, int len);
67 extern int seg6_do_srh_encap(struct sk_buff *skb, struct ipv6_sr_hdr *osrh,
69 extern int seg6_do_srh_inline(struct sk_buff *skb, struct ipv6_sr_hdr *osrh);
70 extern int seg6_lookup_nexthop(struct sk_buff *skb, struct in6_addr *nhaddr,