netdev - Re: [B.A.T.M.A.N.] [PATCH 03/12] batman-adv: add UNICAST

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Message-ID: <1403033.aGBWZgaJ6z@sven-desktop.home.narfation.org>
Date:	Wed, 07 Nov 2012 20:17:08 +0100
From:	Sven Eckelmann <sven@...fation.org>
To:	b.a.t.m.a.n@...ts.open-mesh.org
Cc:	Antonio Quartulli <ordex@...istici.org>, davem@...emloft.net,
	netdev@...r.kernel.org
Subject: Re: [B.A.T.M.A.N.] [PATCH 03/12] batman-adv: add UNICAST_4ADDR packet type

On Wednesday 07 November 2012 20:11:33 Antonio Quartulli wrote:
> +/**
> + * struct batadv_unicast_4addr_packet - extended unicast packet
> + * @u: common unicast packet header
> + * @src: address of the source
> + * @subtype: packet subtype
> + */
> +struct batadv_unicast_4addr_packet {
> +       struct batadv_unicast_packet u;
> +       uint8_t src[ETH_ALEN];
> +       uint8_t subtype;
> +       uint8_t reserved;
> +       /* "4 bytes boundary + 2 bytes" long to make the payload after the
> +        * following ethernet header again 4 bytes boundary aligned
> +        */
> +};

This doesn't work as you think. Now you have 2 extra padding bytes at the end 
of the batadv_unicast_4addr_packet and therefore make the payload (IPv4 
header..) after the following ethernet header again wrongly aligned.

Kind regards,
	Sven
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