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From: Antonio Quartulli <antonio@meshcoding.com>
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Date: Tue, 4 Aug 2015 22:39:47 +0200
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Subject: Re: [B.A.T.M.A.N.] [PATCH v2] batman-adv: Add lower layer header
 length to headroom
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To: Sven Eckelmann <sven@narfation.org>
Cc: The list for a Better Approach To Mobile Ad-hoc Networking <b.a.t.m.a.n@lists.open-mesh.org>

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On 04/08/15 22:38, Sven Eckelmann wrote:
> The maximum of hard_header_len and needed_headroom of all slave interfa=
ces
> of a batman-adv device must be used to define the batman-adv device
> headroom/header_len. This is required to avoid too small headroom probl=
ems
> when these slave devices try to send the encapsulated packet.
>=20
> The batman-adv therefore uses:
>=20
> 	needed_headroom =3D max(0, dev[0].needed_headroom, ...,
> 			      dev[n].needed_headroom)
> 	hard_header_len =3D max(ETH_HLEN, dev[0].hard_header_len, ...,
> 			      dev[n].hard_header_len) + ETH_HLEN +
> 			  max(sizeof(batadv_*cast_packet))
>=20
> Signed-off-by: Sven Eckelmann <sven@narfation.org>

Acked-by: Antonio Quartulli <antonio@meshcoding.com>


--=20
Antonio Quartulli


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