Re: [B.A.T.M.A.N.] [PATCH v2] batman-adv: Add lower layer header length to headroom

On 04/08/15 22:38, Sven Eckelmann wrote:

The maximum of hard_header_len and needed_headroom of all slave interfaces 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 problems when these slave devices try to send the encapsulated packet.

The batman-adv therefore uses:

needed_headroom = max(0, dev[0].needed_headroom, ..., dev[n].needed_headroom) hard_header_len = max(ETH_HLEN, dev[0].hard_header_len, ..., dev[n].hard_header_len) + ETH_HLEN + max(sizeof(batadv_*cast_packet))

Signed-off-by: Sven Eckelmann sven@narfation.org

Acked-by: Antonio Quartulli antonio@meshcoding.com