LXR linux/include/net/seg6.h

   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
  17#include <linux/net.h>
  18#include <linux/ipv6.h>
  19#include <net/lwtunnel.h>
  20#include <linux/seg6.h>
  21#include <linux/rhashtable.h>
  22
  23static 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
  31static 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
  42struct seg6_pernet_data {
  43        struct mutex lock;
  44        struct in6_addr __rcu *tun_src;
  45#ifdef CONFIG_IPV6_SEG6_HMAC
  46        struct rhashtable hmac_infos;
  47#endif
  48};
  49
  50static inline struct seg6_pernet_data *seg6_pernet(struct net *net)
  51{
  52        return net->ipv6.seg6_data;
  53}
  54
  55extern int seg6_init(void);
  56extern void seg6_exit(void);
  57extern int seg6_iptunnel_init(void);
  58extern void seg6_iptunnel_exit(void);
  59extern int seg6_local_init(void);
  60extern void seg6_local_exit(void);
  61
  62extern bool seg6_validate_srh(struct ipv6_sr_hdr *srh, int len);
  63extern int seg6_do_srh_encap(struct sk_buff *skb, struct ipv6_sr_hdr *osrh,
  64                             int proto);
  65extern int seg6_do_srh_inline(struct sk_buff *skb, struct ipv6_sr_hdr *osrh);
  66
  67#endif
  68