Bluetooth: Add initial support for ERTM packets transfers

This patch adds support for ERTM transfers, without retransmission, with
txWindow up to 63 and with acknowledgement of packets received. Now the
packets are queued before call l2cap_do_send(), so packets couldn't be
sent at the time we call l2cap_sock_sendmsg(). They will be sent in
an asynchronous way on later calls of l2cap_ertm_send(). Besides if an
error occurs on calling l2cap_do_send() we disconnect the channel.

Initially based on a patch from Nathan Holstein <nathan@lampreynetworks.com>

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

1 files changed, 2 insertions, 1 deletions

diff --git a/include/net/bluetooth/bluetooth.h b/include/net/bluetooth/bluetooth.h
index 968166a45f86..65a5cf868fd6 100644
--- a/include/net/bluetooth/bluetooth.h
+++ b/include/net/bluetooth/bluetooth.h
@@ -138,8 +138,9 @@ struct sock *bt_accept_dequeue(struct sock *parent, struct socket *newsock);
 struct bt_skb_cb {
         __u8 pkt_type;
         __u8 incoming;
+        __u8 tx_seq;
 };
-#define bt_cb(skb) ((struct bt_skb_cb *)(skb->cb)) 
+#define bt_cb(skb) ((struct bt_skb_cb *)((skb)->cb))
 
 static inline struct sk_buff *bt_skb_alloc(unsigned int len, gfp_t how)
 {