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6lowpan: add private neighbour data

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This patch will introduce a 6lowpan neighbour private data. Like the
interface private data we handle private data for generic 6lowpan and
for link-layer specific 6lowpan.

The current first use case if to save the short address for a 802.15.4
6lowpan neighbour.

Cc: David S. Miller <[email protected]>
Reviewed-by: Stefan Schmidt <[email protected]>
Acked-by: YOSHIFUJI Hideaki <[email protected]>
Signed-off-by: Alexander Aring <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Alexander Aring 2016-06-15 21:20:16 +02:00 • committed by David S. Miller
commit 8626a0c83b
3 changed files with 23 additions and 2 deletions
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12
net/ieee802154/6lowpan/core.c
View file

@ -81,11 +81,21 @@ static int lowpan_stop(struct net_device *dev)
return 0;
}
static int lowpan_neigh_construct(struct neighbour *n)
{
struct lowpan_802154_neigh *neigh = lowpan_802154_neigh(neighbour_priv(n));
/* default no short_addr is available for a neighbour */
neigh->short_addr = cpu_to_le16(IEEE802154_ADDR_SHORT_UNSPEC);
return 0;
}
static const struct net_device_ops lowpan_netdev_ops = {
.ndo_init = lowpan_dev_init,
.ndo_start_xmit = lowpan_xmit,
.ndo_open = lowpan_open,
.ndo_stop = lowpan_stop,
.ndo_neigh_construct = lowpan_neigh_construct,
};
static void lowpan_setup(struct net_device *ldev)
@ -150,6 +160,8 @@ static int lowpan_newlink(struct net *src_net, struct net_device *ldev,
wdev->needed_headroom;
ldev->needed_tailroom = wdev->needed_tailroom;
ldev->neigh_priv_len = sizeof(struct lowpan_802154_neigh);
ret = lowpan_register_netdevice(ldev, LOWPAN_LLTYPE_IEEE802154);
if (ret < 0) {
dev_put(wdev);