ieee802154: handle datagram variables as u16

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This reverts commit 9abc378c66e3d6f437eed77c1c534cbc183523f7
("ieee802154: 6lowpan: change datagram var types").

The reason is that I forgot the IPv6 fragmentation here. Our MTU of
lowpan interface is 1280 and skb->len should not above of that. If we
reach a payload above 1280 in IPv6 header then we have a IPv6
fragmentation above 802.15.4 6LoWPAN fragmentation. The type "u16" was
fine, instead I added now a WARN_ON_ONCE if skb->len is above MTU which
should never happen otherwise IPv6 on minimum MTU size is broken.

Signed-off-by: Alexander Aring <alex.aring@gmail.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

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Alexander Aring 2015-10-01 08:03:06 +02:00 • committed by Marcel Holtmann

parent e98d6d6203

commit 5f509239ec

3 changed files with 9 additions and 7 deletions

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4

net/ieee802154/6lowpan/6lowpan_i.h

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2

net/ieee802154/6lowpan/reassembly.c

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10

net/ieee802154/6lowpan/tx.c

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