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| author | Gustavo F. Padovan <gustavo@las.ic.unicamp.br> | 2009-08-26 04:04:02 -0300 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2009-08-26 00:12:20 -0700 |
| commit | 2246b2f1b43f3fbd128e72b129dcbbd3202cc592 (patch) | |
| tree | edfe82ab47829bb320c41c04289e2a01f23fba56 /net | |
| parent | ca42a613c92d131ff02d5714419d58c36c3459f3 (diff) | |
| download | linux-2246b2f1b43f3fbd128e72b129dcbbd3202cc592.tar.gz linux-2246b2f1b43f3fbd128e72b129dcbbd3202cc592.tar.bz2 linux-2246b2f1b43f3fbd128e72b129dcbbd3202cc592.zip | |
Bluetooth: Handle L2CAP case when the remote receiver is busy
Implement all issues related to RemoteBusy in the RECV state table.
Signed-off-by: Gustavo F. Padovan <gustavo@las.ic.unicamp.br>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'net')
| -rw-r--r-- | net/bluetooth/l2cap.c | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c index 0a36c61c011f..40fbf5cb1f7e 100644 --- a/net/bluetooth/l2cap.c +++ b/net/bluetooth/l2cap.c @@ -1350,7 +1350,8 @@ static int l2cap_ertm_send(struct sock *sk) if (pi->conn_state & L2CAP_CONN_WAIT_F) return 0; - while ((skb = sk->sk_send_head) && (!l2cap_tx_window_full(sk))) { + while ((skb = sk->sk_send_head) && (!l2cap_tx_window_full(sk)) + && !(pi->conn_state & L2CAP_CONN_REMOTE_BUSY)) { tx_skb = skb_clone(skb, GFP_ATOMIC); if (pi->remote_max_tx && @@ -3351,7 +3352,10 @@ static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, str control |= L2CAP_SUPER_RCV_READY | (pi->buffer_seq << L2CAP_CTRL_REQSEQ_SHIFT); l2cap_send_sframe(l2cap_pi(sk), control); + pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; + } else if (rx_control & L2CAP_CTRL_FINAL) { + pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; pi->expected_ack_seq = tx_seq; l2cap_drop_acked_frames(sk); @@ -3366,13 +3370,19 @@ static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, str } else { pi->expected_ack_seq = tx_seq; l2cap_drop_acked_frames(sk); - if (pi->unacked_frames > 0) + + if ((pi->conn_state & L2CAP_CONN_REMOTE_BUSY) + && (pi->unacked_frames > 0)) __mod_retrans_timer(); + l2cap_ertm_send(sk); + pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; } break; case L2CAP_SUPER_REJECT: + pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; + pi->expected_ack_seq = __get_reqseq(rx_control); l2cap_drop_acked_frames(sk); @@ -3384,6 +3394,8 @@ static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, str break; case L2CAP_SUPER_SELECT_REJECT: + pi->conn_state &= ~L2CAP_CONN_REMOTE_BUSY; + if (rx_control & L2CAP_CTRL_POLL) { l2cap_retransmit_frame(sk, tx_seq); pi->expected_ack_seq = tx_seq; @@ -3410,6 +3422,15 @@ static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, str break; case L2CAP_SUPER_RCV_NOT_READY: + pi->conn_state |= L2CAP_CONN_REMOTE_BUSY; + pi->expected_ack_seq = tx_seq; + l2cap_drop_acked_frames(sk); + + del_timer(&l2cap_pi(sk)->retrans_timer); + if (rx_control & L2CAP_CTRL_POLL) { + u16 control = L2CAP_CTRL_FINAL | L2CAP_SUPER_RCV_READY; + l2cap_send_sframe(l2cap_pi(sk), control); + } break; } |