6lowpan: obtain IEEE802.15.4 sequence number from the MAC layer
authorTony Cheneau <tony.cheneau@amnesiak.org>
Mon, 25 Mar 2013 17:59:30 +0000 (17:59 +0000)
committerDavid S. Miller <davem@davemloft.net>
Tue, 26 Mar 2013 16:37:58 +0000 (12:37 -0400)
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>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ieee802154/6lowpan.c

index f952451..d1d4ee6 100644 (file)
@@ -573,6 +573,7 @@ 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;
@@ -1127,6 +1128,12 @@ 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,
 };
@@ -1140,6 +1147,7 @@ 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)