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Bluetooth: Fix handle of received P-bit

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ERTM spec mandates that after receive a P-bit we shall send an F-bit in
response. This patch fixes this for retransmitted packets, on
retransmitting we were missing to check for a pending F-bit to be sent.
Also we were missing some annotation to send a F-bit.

Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi>
Reviewed-by: João Paulo Rechi Vita <jprvita@profusion.mobi>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Gustavo F. Padovan 2010-05-29 02:24:35 -03:00 committed by Marcel Holtmann
parent 2ece3684b4
commit 3cb123d1c0
1 changed files with 12 additions and 2 deletions
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14
net/bluetooth/l2cap.c
View file

@ -1430,10 +1430,15 @@ static void l2cap_retransmit_one_frame(struct sock *sk, u8 tx_seq)
tx_skb = skb_clone(skb, GFP_ATOMIC);
bt_cb(skb)->retries++;
control = get_unaligned_le16(tx_skb->data + L2CAP_HDR_SIZE);
control &= L2CAP_CTRL_SAR;
if (pi->conn_state & L2CAP_CONN_SEND_FBIT) {
control |= L2CAP_CTRL_FINAL;
pi->conn_state &= ~L2CAP_CONN_SEND_FBIT;
}
control |= (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT)
| (tx_seq << L2CAP_CTRL_TXSEQ_SHIFT);
put_unaligned_le16(control, tx_skb->data + L2CAP_HDR_SIZE);
if (pi->fcs == L2CAP_FCS_CRC16) {
@ -3385,7 +3390,6 @@ static inline void l2cap_send_i_or_rr_or_rnr(struct sock *sk)
u16 control = 0;
pi->frames_sent = 0;
pi->conn_state |= L2CAP_CONN_SEND_FBIT;
control |= pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT;
@ -3963,6 +3967,7 @@ static inline void l2cap_data_channel_rrframe(struct sock *sk, u16 rx_control)
l2cap_drop_acked_frames(sk);
if (rx_control & L2CAP_CTRL_POLL) {
pi->conn_state |= L2CAP_CONN_SEND_FBIT;
if (pi->conn_state & L2CAP_CONN_SREJ_SENT) {
if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY) &&
(pi->unacked_frames > 0))
@ -4030,6 +4035,8 @@ static inline void l2cap_data_channel_srejframe(struct sock *sk, u16 rx_control)
if (rx_control & L2CAP_CTRL_POLL) {
pi->expected_ack_seq = tx_seq;
l2cap_drop_acked_frames(sk);
pi->conn_state |= L2CAP_CONN_SEND_FBIT;
l2cap_retransmit_one_frame(sk, tx_seq);
spin_lock_bh(&pi->send_lock);
@ -4064,6 +4071,9 @@ static inline void l2cap_data_channel_rnrframe(struct sock *sk, u16 rx_control)
pi->expected_ack_seq = tx_seq;
l2cap_drop_acked_frames(sk);
if (rx_control & L2CAP_CTRL_POLL)
pi->conn_state |= L2CAP_CONN_SEND_FBIT;
if (!(pi->conn_state & L2CAP_CONN_SREJ_SENT)) {
del_timer(&pi->retrans_timer);
if (rx_control & L2CAP_CTRL_POLL)