6lowpan: obtain IEEE802.15.4 sequence number from the MAC layer

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>

diff --git a/net/ieee802154/6lowpan.c b/net/ieee802154/6lowpan.c
index f9524513847a361110ea3e37993b67229ab05095..d1d4ee69da27915de1336ff1d29f4cb761697d4b 100644 (file)
--- a/net/ieee802154/6lowpan.c
+++ b/net/ieee802154/6lowpan.c
@@ -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)