diff options
| author |   Mat Martineau <mathewm@codeaurora.org> | 2012-05-17 20:53:47 -0700 |
|---|---|---|
| committer |   Johan Hedberg <johan.hedberg@intel.com> | 2012-06-05 06:34:04 +0300 |
| commit | fcd289df8892268ec0783588e0d7e0346fd6a1cd (patch) | |
| tree | 67ac70f7f2de638cfe7d8506a934da968173f8ed /net/bluetooth | |
| parent | Bluetooth: Handle SREJ requests to resend unacked frames (diff) | |
| download | linux-dev-fcd289df8892268ec0783588e0d7e0346fd6a1cd.tar.xz linux-dev-fcd289df8892268ec0783588e0d7e0346fd6a1cd.zip | |
Bluetooth: Handle incoming REJ frames
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>
Diffstat (limited to 'net/bluetooth')
| -rw-r--r-- | net/bluetooth/l2cap_core.c | 33 |
1 files changed, 32 insertions, 1 deletions
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c index 36842a29bb47..5e4a881a6e19 100644 --- a/net/bluetooth/l2cap_core.c +++ b/net/bluetooth/l2cap_core.c @@ -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) |