2 * SR-IPv6 implementation
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 <linux/seg6.h>
20 #include <linux/rhashtable-types.h>
22 static inline void update_csum_diff4(struct sk_buff *skb, __be32 from,
25 __be32 diff[] = { ~from, to };
27 skb->csum = ~csum_partial((char *)diff, sizeof(diff), ~skb->csum);
30 static inline void update_csum_diff16(struct sk_buff *skb, __be32 *from,
34 ~from[0], ~from[1], ~from[2], ~from[3],
35 to[0], to[1], to[2], to[3],
38 skb->csum = ~csum_partial((char *)diff, sizeof(diff), ~skb->csum);
41 struct seg6_pernet_data {
43 struct in6_addr __rcu *tun_src;
44 #ifdef CONFIG_IPV6_SEG6_HMAC
45 struct rhashtable hmac_infos;
49 static inline struct seg6_pernet_data *seg6_pernet(struct net *net)
51 #if IS_ENABLED(CONFIG_IPV6)
52 return net->ipv6.seg6_data;
58 extern int seg6_init(void);
59 extern void seg6_exit(void);
60 extern int seg6_iptunnel_init(void);
61 extern void seg6_iptunnel_exit(void);
62 extern int seg6_local_init(void);
63 extern void seg6_local_exit(void);
65 extern bool seg6_validate_srh(struct ipv6_sr_hdr *srh, int len);
66 extern int seg6_do_srh_encap(struct sk_buff *skb, struct ipv6_sr_hdr *osrh,
68 extern int seg6_do_srh_inline(struct sk_buff *skb, struct ipv6_sr_hdr *osrh);
69 extern int seg6_lookup_nexthop(struct sk_buff *skb, struct in6_addr *nhaddr,