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Bluetooth: L2CAP: Add support for receiving LE Credits

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This adds support to receive LE Credits from the remote updating the
tx endpoint.

Change-Id: I0bf565370d50128cb34ffa3ee5f306bc48d56b3f
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
This commit is contained in:
Luiz Augusto von Dentz 2015-11-12 12:15:56 +02:00 • committed by Anas Nashif
commit 32f1e6d27a
1 changed files with 38 additions and 0 deletions
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38
net/bluetooth/l2cap.c
View file

@ -641,6 +641,41 @@ static void le_disconn_rsp(struct bt_l2cap *l2cap, uint8_t ident,
l2cap_chan_del(chan);
}
static void le_credits(struct bt_l2cap *l2cap, uint8_t ident,
struct net_buf *buf)
{
struct bt_conn *conn = l2cap->chan.conn;
struct bt_l2cap_chan *chan;
struct bt_l2cap_le_credits *ev = (void *)buf->data;
uint16_t credits, cid;
if (buf->len < sizeof(*ev)) {
BT_ERR("Too small LE Credits packet size\n");
return;
}
cid = sys_le16_to_cpu(ev->cid);
credits = sys_le16_to_cpu(ev->credits);
BT_DBG("cid 0x%04x credits %u\n", cid, credits);
chan = bt_l2cap_lookup_tx_cid(conn, cid);
if (!chan) {
BT_ERR("Unable to find channel of LE Credits packet\n");
return;
}
if (chan->tx.credits + credits > UINT16_MAX) {
BT_ERR("Credits overflow\n");
bt_l2cap_chan_disconnect(chan);
return;
}
chan->tx.credits += credits;
BT_DBG("chan %p total credits %u\n", chan, chan->tx.credits);
}
#endif /* CONFIG_BLUETOOTH_L2CAP_DYNAMIC_CHANNEL */
static void l2cap_recv(struct bt_l2cap_chan *chan, struct net_buf *buf)
@ -692,6 +727,9 @@ static void l2cap_recv(struct bt_l2cap_chan *chan, struct net_buf *buf)
case BT_L2CAP_DISCONN_RSP:
le_disconn_rsp(l2cap, hdr->ident, buf);
break;
case BT_L2CAP_LE_CREDITS:
le_credits(l2cap, hdr->ident, buf);
break;
#endif /* CONFIG_BLUETOOTH_L2CAP_DYNAMIC_CHANNEL */
default:
BT_WARN("Unknown L2CAP PDU code 0x%02x\n", hdr->code);