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Date: Mon, 3 Mar 2014 15:10:27 +0100 From: Alexander Aring <alex.aring@...il.com> To: Phoebe Buckheister <phoebe.buckheister@...m.fraunhofer.de> Cc: netdev@...r.kernel.org, davem@...emloft.net, linux-zigbee-devel@...ts.sourceforge.net Subject: Re: [Linux-zigbee-devel] [PATCH 4/4] ieee802154: remove seq member of mac_cb On Mon, Mar 03, 2014 at 03:06:01PM +0100, Alexander Aring wrote: > Hi, > > This patch is fine. Increment and set of DSN value should be done by > mac802154 layer. > > But there is also a known issue with increment of DSN value while > 6lowpan fragmentation. > > On a fragmented packet 6lowpan calls dev_hard_header once, then many > times lowpan_fragment_xmit, depending on the number of fragments which > is needed. > > Each call of lowpan_fragment_xmit will have the same DSN value. Maybe we > should put the increment of DSN in "mac802154/tx.c" before calling xmit > callback from driver (Just an idea). What do you think about that? > Or maybe we can move the dev_hard_header call in lowpan_fragment_xmit and lowpan_xmit if this is possible. But then we doesn't know the mac header length in lowpan_skb_fragmentation. Strange... - Alex -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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