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Bluetooth: Handle incoming REJ frames

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REJ frames are sent by the remote device to request that all frames
after a given sequence number be retransmitted.  These are also an
implicit indication that the remote device is not in a busy state and
can receive new iframes.

Signed-off-by: Mat Martineau <mathewm@codeaurora.org>
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
This commit is contained in:
Mat Martineau 2012-05-17 20:53:47 -07:00 committed by Johan Hedberg
parent f80842a83e
commit fcd289df88
1 changed files with 32 additions and 1 deletions
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33
net/bluetooth/l2cap_core.c
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@ -4613,7 +4613,38 @@ static void l2cap_handle_srej(struct l2cap_chan *chan,
static void l2cap_handle_rej(struct l2cap_chan *chan,
struct l2cap_ctrl *control)
{
/* Placeholder */
struct sk_buff *skb;
BT_DBG("chan %p, control %p", chan, control);
if (control->reqseq == chan->next_tx_seq) {
BT_DBG("Invalid reqseq %d, disconnecting", control->reqseq);
l2cap_send_disconn_req(chan->conn, chan, ECONNRESET);
return;
}
skb = l2cap_ertm_seq_in_queue(&chan->tx_q, control->reqseq);
if (chan->max_tx && skb &&
bt_cb(skb)->control.retries >= chan->max_tx) {
BT_DBG("Retry limit exceeded (%d)", chan->max_tx);
l2cap_send_disconn_req(chan->conn, chan, ECONNRESET);
return;
}
clear_bit(CONN_REMOTE_BUSY, &chan->conn_state);
l2cap_pass_to_tx(chan, control);
if (control->final) {
if (!test_and_clear_bit(CONN_REJ_ACT, &chan->conn_state))
l2cap_retransmit_all(chan, control);
} else {
l2cap_retransmit_all(chan, control);
l2cap_ertm_send(chan);
if (chan->tx_state == L2CAP_TX_STATE_WAIT_F)
set_bit(CONN_REJ_ACT, &chan->conn_state);
}
}
static u8 l2cap_classify_txseq(struct l2cap_chan *chan, u16 txseq)