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Bluetooth: 6lowpan: search for destination address in all peers

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[ Upstream commit b188b03270 ]

Handle overlooked case where the target address is assigned to a peer
and neither route nor gateway exist.

For one peer, no checks are performed to see if it is meant to receive
packets for a given address.

As soon as there is a second peer however, checks are performed
to deal with routes and gateways for handling complex setups with
multiple hops to a target address.
This logic assumed that no route and no gateway imply that the
destination address can not be reached, which is false in case of a
direct peer.

Acked-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Tested-by: Michael Scott <mike@foundries.io>
Signed-off-by: Josua Mayer <josua.mayer@jm0.eu>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Josua Mayer
2019-07-06 17:54:46 +02:00
committed by Greg Kroah-Hartman
parent 05b9c7b005
commit 58aa832459
1 changed files with 10 additions and 4 deletions
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14
net/bluetooth/6lowpan.c
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@@ -187,10 +187,16 @@ static inline struct lowpan_peer *peer_lookup_dst(struct lowpan_btle_dev *dev,
}
if (!rt) {
nexthop = &lowpan_cb(skb)->gw;
if (ipv6_addr_any(nexthop))
return NULL;
if (ipv6_addr_any(&lowpan_cb(skb)->gw)) {
/* There is neither route nor gateway,
* probably the destination is a direct peer.
*/
nexthop = daddr;
} else {
/* There is a known gateway
*/
nexthop = &lowpan_cb(skb)->gw;
}
} else {
nexthop = rt6_nexthop(rt, daddr);