From: Simon Wunderlich Date: Thu, 25 Apr 2013 08:37:22 +0000 (+0200) Subject: batman-adv: add build check macros for packet member offset X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=80067c8320aebab6d740e07be6ecf3dd04787f60;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git batman-adv: add build check macros for packet member offset 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 Signed-off-by: Marek Lindner Signed-off-by: Antonio Quartulli --- diff --git a/net/batman-adv/main.c b/net/batman-adv/main.c index 43dc92e79a76..b22368e66895 100644 --- a/net/batman-adv/main.c +++ b/net/batman-adv/main.c @@ -393,6 +393,14 @@ 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 */