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Bluetooth: Initialize variables and timers for both channel's sides

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Fix ERTM's full-duplex channel to work as specified by ERTM spec. ERTM
needs to handle state vars, timers and counters to send and receive
I-frames(the data frames), i.e., for both sides of data communication.
We initialize all of them to the default values here.
Full-duplex channel is a mandatory feature of ERTM spec.

Signed-off-by: Gustavo F. Padovan <gustavo@las.ic.unicamp.br>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Gustavo F. Padovan 2009-10-03 02:34:36 -03:00 committed by Marcel Holtmann
parent cde9f807f0
commit 0565c1c24a
1 changed files with 36 additions and 18 deletions
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54
net/bluetooth/l2cap.c
View file

@ -2173,6 +2173,21 @@ static void l2cap_add_conf_opt(void **ptr, u8 type, u8 len, unsigned long val)
*ptr += L2CAP_CONF_OPT_SIZE + len;
}
static inline void l2cap_ertm_init(struct sock *sk)
{
l2cap_pi(sk)->expected_ack_seq = 0;
l2cap_pi(sk)->unacked_frames = 0;
l2cap_pi(sk)->buffer_seq = 0;
l2cap_pi(sk)->num_to_ack = 0;
setup_timer(&l2cap_pi(sk)->retrans_timer,
l2cap_retrans_timeout, (unsigned long) sk);
setup_timer(&l2cap_pi(sk)->monitor_timer,
l2cap_monitor_timeout, (unsigned long) sk);
__skb_queue_head_init(SREJ_QUEUE(sk));
}
static int l2cap_mode_supported(__u8 mode, __u32 feat_mask)
{
u32 local_feat_mask = l2cap_feat_mask;
@ -2761,17 +2776,13 @@ static inline int l2cap_config_req(struct l2cap_conn *conn, struct l2cap_cmd_hdr
l2cap_pi(sk)->fcs = L2CAP_FCS_CRC16;
sk->sk_state = BT_CONNECTED;
l2cap_pi(sk)->next_tx_seq = 0;
l2cap_pi(sk)->expected_ack_seq = 0;
l2cap_pi(sk)->unacked_frames = 0;
setup_timer(&l2cap_pi(sk)->retrans_timer,
l2cap_retrans_timeout, (unsigned long) sk);
setup_timer(&l2cap_pi(sk)->monitor_timer,
l2cap_monitor_timeout, (unsigned long) sk);
l2cap_pi(sk)->expected_tx_seq = 0;
__skb_queue_head_init(TX_QUEUE(sk));
__skb_queue_head_init(SREJ_QUEUE(sk));
if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM)
l2cap_ertm_init(sk);
l2cap_chan_ready(sk);
goto unlock;
}
@ -2850,11 +2861,12 @@ static inline int l2cap_config_rsp(struct l2cap_conn *conn, struct l2cap_cmd_hdr
l2cap_pi(sk)->fcs = L2CAP_FCS_CRC16;
sk->sk_state = BT_CONNECTED;
l2cap_pi(sk)->next_tx_seq = 0;
l2cap_pi(sk)->expected_tx_seq = 0;
l2cap_pi(sk)->buffer_seq = 0;
l2cap_pi(sk)->num_to_ack = 0;
__skb_queue_head_init(TX_QUEUE(sk));
__skb_queue_head_init(SREJ_QUEUE(sk));
if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM)
l2cap_ertm_init(sk);
l2cap_chan_ready(sk);
}
@ -2886,9 +2898,12 @@ static inline int l2cap_disconnect_req(struct l2cap_conn *conn, struct l2cap_cmd
sk->sk_shutdown = SHUTDOWN_MASK;
skb_queue_purge(TX_QUEUE(sk));
skb_queue_purge(SREJ_QUEUE(sk));
del_timer(&l2cap_pi(sk)->retrans_timer);
del_timer(&l2cap_pi(sk)->monitor_timer);
if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) {
skb_queue_purge(SREJ_QUEUE(sk));
del_timer(&l2cap_pi(sk)->retrans_timer);
del_timer(&l2cap_pi(sk)->monitor_timer);
}
l2cap_chan_del(sk, ECONNRESET);
bh_unlock_sock(sk);
@ -2913,9 +2928,12 @@ static inline int l2cap_disconnect_rsp(struct l2cap_conn *conn, struct l2cap_cmd
return 0;
skb_queue_purge(TX_QUEUE(sk));
skb_queue_purge(SREJ_QUEUE(sk));
del_timer(&l2cap_pi(sk)->retrans_timer);
del_timer(&l2cap_pi(sk)->monitor_timer);
if (l2cap_pi(sk)->mode == L2CAP_MODE_ERTM) {
skb_queue_purge(SREJ_QUEUE(sk));
del_timer(&l2cap_pi(sk)->retrans_timer);
del_timer(&l2cap_pi(sk)->monitor_timer);
}
l2cap_chan_del(sk, 0);
bh_unlock_sock(sk);