[RFCv4 07/30] Bluetooth: A2MP: Create A2MP channel

Andrei Emeltchenko
2012-03-15T12:29:58Z

Create fixed A2MP channel

Signed-off-by: Andrei Emeltchenko <andrei.emeltchenko@intel.com>
---
include/net/bluetooth/l2cap.h | 3 ++
net/bluetooth/a2mp.c | 63 +++++++++++++++++++++++++++++++++++++++++
2 files changed, 66 insertions(+), 0 deletions(-)
create mode 100644 net/bluetooth/a2mp.c

diff --git a/include/net/bluetooth/l2cap.h b/include/net/bluetooth/l2cap.h
index 1a5c9e6..b3f9854 100644
--- a/include/net/bluetooth/l2cap.h
+++ b/include/net/bluetooth/l2cap.h
@@ -51,6 +51,8 @@
#define L2CAP_CONN_TIMEOUT msecs_to_jiffies(40000)
#define L2CAP_INFO_TIMEOUT msecs_to_jiffies(4000)

+#define L2CAP_A2MP_DEFAULT_MTU 670
+
/* L2CAP socket address */
struct sockaddr_l2 {
sa_family_t l2_family;
@@ -224,6 +226,7 @@ struct l2cap_conn_rsp {
/* channel indentifier */
#define L2CAP_CID_SIGNALING 0x0001
#define L2CAP_CID_CONN_LESS 0x0002
+#define L2CAP_CID_A2MP 0x0003
#define L2CAP_CID_LE_DATA 0x0004
#define L2CAP_CID_LE_SIGNALING 0x0005
#define L2CAP_CID_SMP 0x0006
diff --git a/net/bluetooth/a2mp.c b/net/bluetooth/a2mp.c
new file mode 100644
index 0000000..52bb7d8
--- /dev/null
+++ b/net/bluetooth/a2mp.c
@@ -0,0 +1,63 @@
+/*
+ Copyright (c) 2010,2011 Code Aurora Forum. All rights reserved.
+ Copyright (c) 2011,2012 Intel Corp.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License version 2 and
+ only version 2 as published by the Free Software Foundation.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+*/
+
+#include <net/bluetooth/bluetooth.h>
+#include <net/bluetooth/l2cap.h>
+
+static struct l2cap_ops a2mp_chan_ops = {
+ .name = "L2CAP A2MP channel",
+};
+
+static struct l2cap_chan *open_a2mp_chan(struct l2cap_conn *conn)
+{
+ struct l2cap_chan *chan;
+
+ chan = l2cap_chan_create(NULL);
+
+ hci_conn_hold(conn->hcon);
+
+ BT_DBG("chan %p", chan);
+
+ chan->sec_level = BT_SECURITY_LOW;
+ chan->omtu = L2CAP_A2MP_DEFAULT_MTU;
+ chan->imtu = L2CAP_A2MP_DEFAULT_MTU;
+ chan->flush_to = L2CAP_DEFAULT_FLUSH_TO;
+ chan->fcs = L2CAP_FCS_CRC16;
+
+ chan->ops = &a2mp_chan_ops;
+
+ set_bit(FLAG_FORCE_ACTIVE, &chan->flags);
+
+ chan->max_tx = 0xFF;
+ chan->remote_max_tx = chan->max_tx;
+
+ /* Send 10 packets without ack */
+ chan->tx_win = 10;
+ chan->tx_win_max = L2CAP_DEFAULT_TX_WINDOW;
+ chan->remote_tx_win = chan->tx_win;
+
+ chan->retrans_timeout = L2CAP_DEFAULT_RETRANS_TO;
+ chan->monitor_timeout = L2CAP_DEFAULT_MONITOR_TO;
+
+ skb_queue_head_init(&chan->tx_q);
+
+ chan->mode = L2CAP_MODE_ERTM;
+ l2cap_ertm_init(chan);
+
+ l2cap_chan_add(conn, chan);
+ chan->remote_mps = chan->omtu;
+ chan->mps = chan->omtu;
+
+ return chan;
+}
--
1.7.9.1