Commit b188b032 authored Jul 06, 2019 by Josua Mayer Committed by Marcel Holtmann Jul 06, 2019

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



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>

parent 1d87b88b

net/bluetooth/6lowpan.c

+10 −4

Original line number	Diff line number	Diff line
		@@ -180,10 +180,16 @@ static inline struct lowpan_peer peer_lookup_dst(struct lowpan_btle_dev dev,
		}

		if (!rt) {
		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;

		if (ipv6_addr_any(nexthop))
		return NULL;
		}
		} else {
		nexthop = rt6_nexthop(rt, daddr);

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