Bluetooth: Add support for Retransmission and Monitor Timers

L2CAP uses retransmission and monitor timers to inquiry the other side
about unacked I-frames. After sending each I-frame we (re)start the
retransmission timer. If it expires, we start a monitor timer that send a
S-frame with P bit set and wait for S-frame with F bit set. If monitor
timer expires, try again, at a maximum of L2CAP_DEFAULT_MAX_TX.

Signed-off-by: Gustavo F. Padovan <gustavo@las.ic.unicamp.br>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/include/net/bluetooth/bluetooth.h b/include/net/bluetooth/bluetooth.h
index 65a5cf868fd6..b8b9a8479525 100644
--- a/include/net/bluetooth/bluetooth.h
+++ b/include/net/bluetooth/bluetooth.h
@@ -139,6 +139,7 @@ struct bt_skb_cb {
         __u8 pkt_type;
         __u8 incoming;
         __u8 tx_seq;
+        __u8 retries;
 };
 #define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))