From: Andrei Emeltchenko <andrei.emeltchenko@xxxxxxxxx>
Choose which L2CAP connection to establish by checking support
for HS and remote side supported features.
Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@xxxxxxxxx>
---
include/net/bluetooth/a2mp.h | 1 +
net/bluetooth/a2mp.c | 22 ++++++++++++++++++++++
net/bluetooth/l2cap_core.c | 34 ++++++++++++++++++++++++++++++----
3 files changed, 53 insertions(+), 4 deletions(-)
diff --git a/include/net/bluetooth/a2mp.h b/include/net/bluetooth/a2mp.h
index 8ba236c..68866f4 100644
--- a/include/net/bluetooth/a2mp.h
+++ b/include/net/bluetooth/a2mp.h
@@ -129,5 +129,6 @@ int amp_mgr_put(struct amp_mgr *mgr);
struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn,
struct sk_buff *skb);
void a2mp_send(struct amp_mgr *mgr, u8 code, u8 ident, u16 len, void *data);
+void l2cap_discover_amp(struct l2cap_conn *conn);
#endif /* __A2MP_H */
diff --git a/net/bluetooth/a2mp.c b/net/bluetooth/a2mp.c
index 5ff8f1a..a4df006 100644
--- a/net/bluetooth/a2mp.c
+++ b/net/bluetooth/a2mp.c
@@ -766,3 +766,25 @@ struct l2cap_chan *a2mp_channel_create(struct l2cap_conn *conn,
return mgr->a2mp_chan;
}
+
+void l2cap_discover_amp(struct l2cap_conn *conn)
+{
+ struct a2mp_discov_req req;
+ struct amp_mgr *mgr = conn->hcon->amp_mgr;
+
+ BT_DBG("%p", conn);
+
+ if (!mgr) {
+ mgr = amp_mgr_create(conn);
+ if (!mgr)
+ return;
+ }
+
+ amp_mgr_get(mgr);
+
+ req.mtu = cpu_to_le16(L2CAP_A2MP_DEFAULT_MTU);
+ req.ext_feat = 0;
+ a2mp_send(mgr, A2MP_DISCOVER_REQ, 1, sizeof(req), &req);
+
+ amp_mgr_put(mgr);
+}
diff --git a/net/bluetooth/l2cap_core.c b/net/bluetooth/l2cap_core.c
index b01f9d1..a5256e7 100644
--- a/net/bluetooth/l2cap_core.c
+++ b/net/bluetooth/l2cap_core.c
@@ -989,6 +989,18 @@ static inline int __l2cap_no_conn_pending(struct l2cap_chan *chan)
return !test_bit(CONF_CONNECT_PEND, &chan->conf_state);
}
+static bool __amp_capable(struct l2cap_chan *chan)
+{
+ struct l2cap_conn *conn = chan->conn;
+
+ if (enable_hs &&
+ chan->chan_policy == BT_CHANNEL_POLICY_AMP_PREFERRED &&
+ conn->fixed_chan_mask & L2CAP_FC_A2MP)
+ return true;
+ else
+ return false;
+}
+
static void l2cap_send_conn_req(struct l2cap_chan *chan)
{
struct l2cap_conn *conn = chan->conn;
@@ -1015,6 +1027,16 @@ static void l2cap_chan_ready(struct l2cap_chan *chan)
chan->ops->ready(chan);
}
+static void l2cap_choose_conn(struct l2cap_chan *chan)
+{
+ if (__amp_capable(chan)) {
+ BT_DBG("chan %p AMP capable", chan);
+ l2cap_discover_amp(chan->conn);
+ } else {
+ l2cap_send_conn_req(chan);
+ }
+}
+
static void l2cap_do_start(struct l2cap_chan *chan)
{
struct l2cap_conn *conn = chan->conn;
@@ -1029,8 +1051,9 @@ static void l2cap_do_start(struct l2cap_chan *chan)
return;
if (l2cap_chan_check_security(chan) &&
- __l2cap_no_conn_pending(chan))
- l2cap_send_conn_req(chan);
+ __l2cap_no_conn_pending(chan)) {
+ l2cap_choose_conn(chan);
+ }
} else {
struct l2cap_info_req req;
req.type = __constant_cpu_to_le16(L2CAP_IT_FEAT_MASK);
@@ -1126,7 +1149,7 @@ static void l2cap_conn_start(struct l2cap_conn *conn)
continue;
}
- l2cap_send_conn_req(chan);
+ l2cap_choose_conn(chan);
} else if (chan->state == BT_CONNECT2) {
struct l2cap_conn_rsp rsp;
@@ -5499,7 +5522,10 @@ int l2cap_security_cfm(struct hci_conn *hcon, u8 status, u8 encrypt)
if (chan->state == BT_CONNECT) {
if (!status) {
- l2cap_send_conn_req(chan);
+ /* Unlock chan list since we add A2MP chan */
+ mutex_unlock(&conn->chan_lock);
+ l2cap_choose_conn(chan);
+ mutex_lock(&conn->chan_lock);
} else {
__set_chan_timer(chan, L2CAP_DISC_TIMEOUT);
}
--
1.7.9.5
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