ieee802154: 6lowpan: ensure of sending 1280 packets
authorAlexander Aring <alex.aring@gmail.com>
Tue, 19 Aug 2014 17:03:31 +0000 (19:03 +0200)
committerMarcel Holtmann <marcel@holtmann.org>
Tue, 19 Aug 2014 17:17:41 +0000 (19:17 +0200)
This patch changes the 1281 MTU to 1280. Others stack have only a 1280
byte array for uncompressed 6LoWPAN packets, this avoid that these
stacks have an overflow. Sending 1281 uncompressed 6LoWPAN packets isn't
also rfc complaint.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
net/ieee802154/6lowpan_rtnl.c

index 71fa7d4..6591d27 100644 (file)
@@ -437,7 +437,7 @@ static void lowpan_setup(struct net_device *dev)
        /* Frame Control + Sequence Number + Address fields + Security Header */
        dev->hard_header_len    = 2 + 1 + 20 + 14;
        dev->needed_tailroom    = 2; /* FCS */
-       dev->mtu                = 1281;
+       dev->mtu                = IPV6_MIN_MTU;
        dev->tx_queue_len       = 0;
        dev->flags              = IFF_BROADCAST | IFF_MULTICAST;
        dev->watchdog_timeo     = 0;