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| author |   Gustavo F. Padovan <gustavo@las.ic.unicamp.br> | 2009-08-20 22:26:00 -0300 |
|---|---|---|
| committer |   Marcel Holtmann <marcel@holtmann.org> | 2009-08-22 14:56:15 -0700 |
| commit | e90bac061b17cd81bd0df30606c64f4543bf5ca0 (patch) | |
| tree | 3529111fa5ba07bdd8ed9627d10d623f77416ace /include/net/bluetooth/l2cap.h | |
| parent | Bluetooth: Initial support for retransmission of packets with REJ frames (diff) | |
| download | linux-dev-e90bac061b17cd81bd0df30606c64f4543bf5ca0.tar.xz linux-dev-e90bac061b17cd81bd0df30606c64f4543bf5ca0.zip | |
Bluetooth: Add support for Retransmission and Monitor Timers
L2CAP uses retransmission and monitor timers to inquiry the other side
about unacked I-frames. After sending each I-frame we (re)start the
retransmission timer. If it expires, we start a monitor timer that send a
S-frame with P bit set and wait for S-frame with F bit set. If monitor
timer expires, try again, at a maximum of L2CAP_DEFAULT_MAX_TX.
Signed-off-by: Gustavo F. Padovan <gustavo@las.ic.unicamp.br>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Diffstat (limited to 'include/net/bluetooth/l2cap.h')
| -rw-r--r-- | include/net/bluetooth/l2cap.h | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/include/net/bluetooth/l2cap.h b/include/net/bluetooth/l2cap.h index a1d8ec468ef3..2cf7003cb1b6 100644 --- a/include/net/bluetooth/l2cap.h +++ b/include/net/bluetooth/l2cap.h @@ -31,9 +31,9 @@ #define L2CAP_DEFAULT_FLUSH_TO 0xffff #define L2CAP_DEFAULT_TX_WINDOW 63 #define L2CAP_DEFAULT_NUM_TO_ACK (L2CAP_DEFAULT_TX_WINDOW/5) -#define L2CAP_DEFAULT_MAX_RECEIVE 1 -#define L2CAP_DEFAULT_RETRANS_TO 300 /* 300 milliseconds */ -#define L2CAP_DEFAULT_MONITOR_TO 1000 /* 1 second */ +#define L2CAP_DEFAULT_MAX_TX 3 +#define L2CAP_DEFAULT_RETRANS_TO 1000 /* 1 second */ +#define L2CAP_DEFAULT_MONITOR_TO 12000 /* 12 seconds */ #define L2CAP_DEFAULT_MAX_PDU_SIZE 672 #define L2CAP_CONN_TIMEOUT (40000) /* 40 seconds */ @@ -318,6 +318,7 @@ struct l2cap_pinfo { __u8 req_seq; __u8 expected_tx_seq; __u8 unacked_frames; + __u8 retry_count; __u8 num_to_ack; __u16 sdu_len; __u16 partial_sdu_len; @@ -333,6 +334,8 @@ struct l2cap_pinfo { __le16 sport; + struct timer_list retrans_timer; + struct timer_list monitor_timer; struct sk_buff_head tx_queue; struct l2cap_conn *conn; struct sock *next_c; @@ -352,6 +355,12 @@ struct l2cap_pinfo { #define L2CAP_CONN_SAR_SDU 0x01 #define L2CAP_CONN_UNDER_REJ 0x02 +#define L2CAP_CONN_WAIT_F 0x04 + +#define __mod_retrans_timer() mod_timer(&l2cap_pi(sk)->retrans_timer, \ + jiffies + msecs_to_jiffies(L2CAP_DEFAULT_RETRANS_TO)); +#define __mod_monitor_timer() mod_timer(&l2cap_pi(sk)->monitor_timer, \ + jiffies + msecs_to_jiffies(L2CAP_DEFAULT_MONITOR_TO)); static inline int l2cap_tx_window_full(struct sock *sk) { |