Bluetooth: 6lowpan: Set the peer IPv6 address correctly

The peer IPv6 address contained wrong U/L bit in the EUI-64 part.

Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Cc: stable@vger.kernel.org # 3.17.x

diff --git a/net/bluetooth/6lowpan.c b/net/bluetooth/6lowpan.c
index 5532e6e..b229aed 100644 (file)
--- a/net/bluetooth/6lowpan.c
+++ b/net/bluetooth/6lowpan.c
@@ -671,6 +671,14 @@ static struct l2cap_chan *chan_open(struct l2cap_chan *pchan)
        return chan;
 }
 
+static void set_ip_addr_bits(u8 addr_type, u8 *addr)
+{
+       if (addr_type == BDADDR_LE_PUBLIC)
+               *addr |= 0x02;
+       else
+               *addr &= ~0x02;
+}
+
 static struct l2cap_chan *add_peer_chan(struct l2cap_chan *chan,
                                        struct lowpan_dev *dev)
 {
@@ -693,6 +701,11 @@ static struct l2cap_chan *add_peer_chan(struct l2cap_chan *chan,
        memcpy(&peer->eui64_addr, (u8 *)&peer->peer_addr.s6_addr + 8,
               EUI64_ADDR_LEN);
 
+       /* IPv6 address needs to have the U/L bit set properly so toggle
+        * it back here.
+        */
+       set_ip_addr_bits(chan->dst_type, (u8 *)&peer->peer_addr.s6_addr + 8);
+
        write_lock_irqsave(&devices_lock, flags);
        INIT_LIST_HEAD(&peer->list);
        peer_add(dev, peer);