diff mbox

batman-adv: add build checks for packet sizes

Message ID 1387303932-18445-1-git-send-email-sw@simonwunderlich.de (mailing list archive)
State Accepted, archived
Commit 30e60452fcfdc5dbb2e46998b8d2476672ded929
Headers

Commit Message

Simon Wunderlich Dec. 17, 2013, 6:12 p.m. UTC 
  With unrolling the batadv_header into the respective structures, the
offsetof checks are now useless. Instead, add build checks for all
packet types which go over the wire to avoid problems with wrong sizes
or compatibility issues on some architectures which don't use every day.

Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
---
 main.c |   24 +++++++++++++++++-------
 1 file changed, 17 insertions(+), 7 deletions(-)

Comments

Marek Lindner Dec. 25, 2013, 2:17 p.m. UTC | #1 
On Tuesday 17 December 2013 19:12:12 Simon Wunderlich wrote:
> With unrolling the batadv_header into the respective structures, the
> offsetof checks are now useless. Instead, add build checks for all
> packet types which go over the wire to avoid problems with wrong sizes
> or compatibility issues on some architectures which don't use every day.
> 
> Signed-off-by: Simon Wunderlich <sw@simonwunderlich.de>
> ---
>  main.c |   24 +++++++++++++++++-------
>  1 file changed, 17 insertions(+), 7 deletions(-)

Applied in revision 30e6045.

Thanks,
Marek
diff mbox

Patch

diff --git a/main.c b/main.c
index 945e441..ad6aeed 100644
--- a/main.c
+++ b/main.c
@@ -419,13 +419,23 @@  static void batadv_recv_handler_init(void)
 	for (i = BATADV_UNICAST_MIN; i <= BATADV_UNICAST_MAX; i++)
 		batadv_rx_handler[i] = batadv_recv_unhandled_unicast_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_tvlv_packet, dst) != 4);
-	BUILD_BUG_ON(offsetof(struct batadv_frag_packet, dest) != 4);
-	BUILD_BUG_ON(offsetof(struct batadv_icmp_packet, dst) != 4);
-	BUILD_BUG_ON(offsetof(struct batadv_icmp_packet_rr, dst) != 4);
+	/* compile time checks for sizes */
+	BUILD_BUG_ON(sizeof(struct batadv_bla_claim_dst) != 6);
+	BUILD_BUG_ON(sizeof(struct batadv_ogm_packet) != 24);
+	BUILD_BUG_ON(sizeof(struct batadv_icmp_header) != 20);
+	BUILD_BUG_ON(sizeof(struct batadv_icmp_packet) != 20);
+	BUILD_BUG_ON(sizeof(struct batadv_icmp_packet_rr) != 116);
+	BUILD_BUG_ON(sizeof(struct batadv_unicast_packet) != 10);
+	BUILD_BUG_ON(sizeof(struct batadv_unicast_4addr_packet) != 18);
+	BUILD_BUG_ON(sizeof(struct batadv_frag_packet) != 20);
+	BUILD_BUG_ON(sizeof(struct batadv_bcast_packet) != 14);
+	BUILD_BUG_ON(sizeof(struct batadv_coded_packet) != 46);
+	BUILD_BUG_ON(sizeof(struct batadv_unicast_tvlv_packet) != 20);
+	BUILD_BUG_ON(sizeof(struct batadv_tvlv_hdr) != 4);
+	BUILD_BUG_ON(sizeof(struct batadv_tvlv_gateway_data) != 8);
+	BUILD_BUG_ON(sizeof(struct batadv_tvlv_tt_vlan_data) != 8);
+	BUILD_BUG_ON(sizeof(struct batadv_tvlv_tt_change) != 12);
+	BUILD_BUG_ON(sizeof(struct batadv_tvlv_roam_adv) != 8);
 
 	/* broadcast packet */
 	batadv_rx_handler[BATADV_BCAST] = batadv_recv_bcast_packet;