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| author | Gustavo F. Padovan <gustavo@las.ic.unicamp.br> | 2009-08-20 22:26:04 -0300 |
|---|---|---|
| committer | Marcel Holtmann <marcel@holtmann.org> | 2009-08-22 15:03:43 -0700 |
| commit | ef54fd937fbd5ebaeb023818524565bd526a5f36 (patch) | |
| tree | c664288f00548b8c531ff44a0bc8c7f18542740e | |
| parent | 8f17154f1f70fcc6faa31ac82164fcf7f0599f38 (diff) | |
| download | linux-stable-ef54fd937fbd5ebaeb023818524565bd526a5f36.tar.gz linux-stable-ef54fd937fbd5ebaeb023818524565bd526a5f36.tar.bz2 linux-stable-ef54fd937fbd5ebaeb023818524565bd526a5f36.zip | |
Bluetooth: Full support for receiving L2CAP SREJ frames
Support for receiving of SREJ frames as specified by the state table.
Signed-off-by: Gustavo F. Padovan <gustavo@las.ic.unicamp.br>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
| -rw-r--r-- | include/net/bluetooth/l2cap.h | 3 | ||||
| -rw-r--r-- | net/bluetooth/l2cap.c | 30 |
2 files changed, 32 insertions, 1 deletions
diff --git a/include/net/bluetooth/l2cap.h b/include/net/bluetooth/l2cap.h index 9f2126a4f6f5..7ca614ac5d43 100644 --- a/include/net/bluetooth/l2cap.h +++ b/include/net/bluetooth/l2cap.h @@ -328,6 +328,7 @@ struct l2cap_pinfo { __u8 expected_tx_seq; __u8 buffer_seq; __u8 buffer_seq_srej; + __u8 srej_save_reqseq; __u8 unacked_frames; __u8 retry_count; __u8 num_to_ack; @@ -370,6 +371,8 @@ struct l2cap_pinfo { #define L2CAP_CONN_SAR_SDU 0x01 #define L2CAP_CONN_SREJ_SENT 0x02 #define L2CAP_CONN_WAIT_F 0x04 +#define L2CAP_CONN_SREJ_ACT 0x08 +#define L2CAP_CONN_SEND_PBIT 0x10 #define __mod_retrans_timer() mod_timer(&l2cap_pi(sk)->retrans_timer, \ jiffies + msecs_to_jiffies(L2CAP_DEFAULT_RETRANS_TO)); diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c index 70aff921db8c..c04526f3df2e 100644 --- a/net/bluetooth/l2cap.c +++ b/net/bluetooth/l2cap.c @@ -3241,6 +3241,10 @@ static void l2cap_send_srejframe(struct sock *sk, u8 tx_seq) while (tx_seq != pi->expected_tx_seq) { control = L2CAP_SUPER_SELECT_REJECT; control |= pi->expected_tx_seq << L2CAP_CTRL_REQSEQ_SHIFT; + if (pi->conn_state & L2CAP_CONN_SEND_PBIT) { + control |= L2CAP_CTRL_POLL; + pi->conn_state &= ~L2CAP_CONN_SEND_PBIT; + } l2cap_send_sframe(pi, control); new = kzalloc(sizeof(struct srej_list), GFP_ATOMIC); @@ -3300,6 +3304,8 @@ static inline int l2cap_data_channel_iframe(struct sock *sk, u16 rx_control, str __skb_queue_head_init(SREJ_QUEUE(sk)); l2cap_add_to_srej_queue(sk, skb, tx_seq, sar); + pi->conn_state |= L2CAP_CONN_SEND_PBIT; + l2cap_send_srejframe(sk, tx_seq); } return 0; @@ -3370,7 +3376,29 @@ static inline int l2cap_data_channel_sframe(struct sock *sk, u16 rx_control, str break; case L2CAP_SUPER_SELECT_REJECT: - l2cap_retransmit_frame(sk, tx_seq); + if (rx_control & L2CAP_CTRL_POLL) { + l2cap_retransmit_frame(sk, tx_seq); + pi->expected_ack_seq = tx_seq; + l2cap_drop_acked_frames(sk); + l2cap_ertm_send(sk); + if (pi->conn_state & L2CAP_CONN_WAIT_F) { + pi->srej_save_reqseq = tx_seq; + pi->conn_state |= L2CAP_CONN_SREJ_ACT; + } + } else if (rx_control & L2CAP_CTRL_FINAL) { + if ((pi->conn_state & L2CAP_CONN_SREJ_ACT) && + pi->srej_save_reqseq == tx_seq) + pi->srej_save_reqseq &= ~L2CAP_CONN_SREJ_ACT; + else + l2cap_retransmit_frame(sk, tx_seq); + } + else { + l2cap_retransmit_frame(sk, tx_seq); + if (pi->conn_state & L2CAP_CONN_WAIT_F) { + pi->srej_save_reqseq = tx_seq; + pi->conn_state |= L2CAP_CONN_SREJ_ACT; + } + } break; case L2CAP_SUPER_RCV_NOT_READY: |