ipv6: introduce neighbour discovery ops

This patch introduces neighbour discovery ops callback structure. The
idea is to separate the handling for 6LoWPAN into the 6lowpan module.

These callback offers 6lowpan different handling, such as 802.15.4 short
address handling or RFC6775 (Neighbor Discovery Optimization for IPv6
over 6LoWPANs).

Cc: David S. Miller <davem@davemloft.net>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: James Morris <jmorris@namei.org>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: Patrick McHardy <kaber@trash.net>
Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: Alexander Aring <aar@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 0 deletions

diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index 36e43bd422f8..890158e99159 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -1456,6 +1456,8 @@ enum netdev_priv_flags {
  *      @netdev_ops:    Includes several pointers to callbacks,
  *                      if one wants to override the ndo_*() functions
  *      @ethtool_ops:   Management operations
+ *      @ndisc_ops:     Includes callbacks for different IPv6 neighbour
+ *                      discovery handling. Necessary for e.g. 6LoWPAN.
  *      @header_ops:    Includes callbacks for creating,parsing,caching,etc
  *                      of Layer 2 headers.
  *
@@ -1672,6 +1674,9 @@ struct net_device {
 #ifdef CONFIG_NET_L3_MASTER_DEV
         const struct l3mdev_ops *l3mdev_ops;
 #endif
+#if IS_ENABLED(CONFIG_IPV6)
+        const struct ndisc_ops *ndisc_ops;
+#endif
 
         const struct header_ops *header_ops;