Patchwork [net-next,08/15] 6lowpan: obtain IEEE802.15.4 sequence number from the MAC layer

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Submitter Tony Cheneau
Date Oct. 23, 2012, 4:09 a.m.
Message ID <1350965397-12384-9-git-send-email-tony.cheneau@amnesiak.org>
Download mbox | patch
Permalink /patch/193330/
State Changes Requested
Delegated to: David Miller
Headers show

Comments

Tony Cheneau - Oct. 23, 2012, 4:09 a.m.
This patch sets the sequence number in the frame format. Without this
fix, the sequence number is always set to 0. This makes trafic analysis
very hard.

Signed-off-by: Tony Cheneau <tony.cheneau@amnesiak.org>
---
 net/ieee802154/6lowpan.c |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)

Patch

diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c
index eb8003b..24b83fa 100644
--- a/net/ieee802154/6lowpan.c
+++ b/net/ieee802154/6lowpan.c
@@ -578,6 +578,7 @@  static int lowpan_header_create(struct sk_buff *skb,
 	 */
 	{
 		mac_cb(skb)->flags = IEEE802154_FC_TYPE_DATA;
+		mac_cb(skb)->seq = ieee802154_mlme_ops(dev)->get_dsn(dev);
 
 		/* prepare wpan address data */
 		sa.addr_type = IEEE802154_ADDR_LONG;
@@ -1123,6 +1124,12 @@  static u16 lowpan_get_short_addr(const struct net_device *dev)
 	return ieee802154_mlme_ops(real_dev)->get_short_addr(real_dev);
 }
 
+static u8 lowpan_get_dsn(const struct net_device *dev)
+{
+	struct net_device *real_dev = lowpan_dev_info(dev)->real_dev;
+	return ieee802154_mlme_ops(real_dev)->get_dsn(real_dev);
+}
+
 static struct header_ops lowpan_header_ops = {
 	.create	= lowpan_header_create,
 };
@@ -1136,6 +1143,7 @@  static struct ieee802154_mlme_ops lowpan_mlme = {
 	.get_pan_id = lowpan_get_pan_id,
 	.get_phy = lowpan_get_phy,
 	.get_short_addr = lowpan_get_short_addr,
+	.get_dsn = lowpan_get_dsn,
 };
 
 static void lowpan_setup(struct net_device *dev)