[v4,2/6] batman-adv: add build check macros for packet member offset
Commit Message
Since we removed the __packed from most of the packets, we should
make sure that the offset generated by the compiler are correct for
sent/received data.
Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
---
main.c | 8 ++++++++
1 file changed, 8 insertions(+)
Comments
On Thursday, April 25, 2013 16:37:22 Simon Wunderlich wrote:
> Since we removed the __packed from most of the packets, we should
> make sure that the offset generated by the compiler are correct for
> sent/received data.
>
> Signed-off-by: Simon Wunderlich <siwu@hrz.tu-chemnitz.de>
> ---
> main.c | 8 ++++++++
> 1 file changed, 8 insertions(+)
Applied in revision a36f66e.
Thanks,
Marek
@@ -328,6 +328,14 @@ static void batadv_recv_handler_init(void)
for (i = 0; i < ARRAY_SIZE(batadv_rx_handler); i++)
batadv_rx_handler[i] = batadv_recv_unhandled_packet;
+ /* compile time checks for struct member offsets */
+ BUILD_BUG_ON(offsetof(struct batadv_unicast_4addr_packet, src) != 10);
+ BUILD_BUG_ON(offsetof(struct batadv_unicast_packet, dest) != 4);
+ BUILD_BUG_ON(offsetof(struct batadv_unicast_frag_packet, dest) != 4);
+ BUILD_BUG_ON(offsetof(struct batadv_unicast_tvlv_packet, dst) != 4);
+ BUILD_BUG_ON(offsetof(struct batadv_icmp_packet, dst) != 4);
+ BUILD_BUG_ON(offsetof(struct batadv_icmp_packet_rr, dst) != 4);
+
/* batman icmp packet */
batadv_rx_handler[BATADV_ICMP] = batadv_recv_icmp_packet;
/* unicast with 4 addresses packet */