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Date: Thu, 3 Dec 2009 19:45:47 +0100
From: Marcel Holtmann <marcel@...tmann.org>
To: "David S. Miller" <davem@...emloft.net>
Cc: netdev@...r.kernel.org
Subject: [PATCH 10/18] Bluetooth: Initialize variables and timers for both channel's sides
From: Gustavo F. Padovan <gustavo@....ic.unicamp.br>
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@....ic.unicamp.br>
Signed-off-by: Marcel Holtmann <marcel@...tmann.org>
---
net/bluetooth/l2cap.c | 54 ++++++++++++++++++++++++++++++++----------------
1 files changed, 36 insertions(+), 18 deletions(-)
diff --git a/net/bluetooth/l2cap.c b/net/bluetooth/l2cap.c
index 54992f7..dfd0327 100644
--- a/net/bluetooth/l2cap.c
+++ b/net/bluetooth/l2cap.c
@@ -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)->next_tx_seq = 0;
+ 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);
--
1.6.5.2
--
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