Bluetooth: Store source address of HCI connections

The source addressed was based on the public address of the HCI device,
but with LE connections this not always the case. For example single
mode LE-only controllers would use a static random address. And this
address is configured by userspace.

To not complicate the lookup of what kind of address is in use, store
the correct source address for each HCI connection.
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>

include/net/bluetooth/hci_core.h

@@ -300,6 +300,7 @@ struct hci_conn {
 
 	bdaddr_t	dst;
 	__u8		dst_type;
+	bdaddr_t	src;
 	__u8		src_type;
 	__u16		handle;
 	__u16		state;

net/bluetooth/hci_conn.c

@@ -381,6 +381,7 @@ struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst)
 		return NULL;
 
 	bacpy(&conn->dst, dst);
+	bacpy(&conn->src, &hdev->bdaddr);
 	conn->hdev  = hdev;
 	conn->type  = type;
 	conn->mode  = HCI_CM_ACTIVE;
@@ -624,10 +625,12 @@ static struct hci_conn *hci_connect_le(struct hci_dev *hdev, bdaddr_t *dst,
 	else
 		conn->dst_type = ADDR_LE_DEV_RANDOM;
 
-	if (bacmp(&hdev->bdaddr, BDADDR_ANY))
+	if (bacmp(&conn->src, BDADDR_ANY)) {
 		conn->src_type = ADDR_LE_DEV_PUBLIC;
-	else
+	} else {
+		bacpy(&conn->src, &hdev->static_addr);
 		conn->src_type = ADDR_LE_DEV_RANDOM;
+	}
 
 	conn->state = BT_CONNECT;
 	conn->out = true;