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| author | Josua Mayer <josua.mayer@jm0.eu> | 2019-07-06 18:54:46 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-07-26 10:12:50 +0300 |
| commit | 0eb799964db313c8b13a39a0c291da91c416daf3 (patch) | |
| tree | 1a8d7021b9bceb3ab31ac3e8407e3b0043655281 | |
| parent | 39f0228a402a6d9d49de13aa9548765978519cab (diff) | |
| download | linux-0eb799964db313c8b13a39a0c291da91c416daf3.tar.xz | |
Bluetooth: 6lowpan: search for destination address in all peers
[ Upstream commit b188b03270b7f8568fc714101ce82fbf5e811c5a ]
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>
| -rw-r--r-- | net/bluetooth/6lowpan.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/net/bluetooth/6lowpan.c b/net/bluetooth/6lowpan.c index a7cd23f00bde..50530561da98 100644 --- a/net/bluetooth/6lowpan.c +++ b/net/bluetooth/6lowpan.c @@ -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); |