Bluetooth: Append local name and CoD to Extended Controller Info

This adds device class, complete local name and short local name
to EIR data in Extended Controller Info as specified in docs.
Signed-off-by: Michał Narajowski <michal.narajowski@codecoup.pl>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

net/bluetooth/mgmt.c

@@ -866,26 +866,58 @@ static int read_controller_info(struct sock *sk, struct hci_dev *hdev,
 				 sizeof(rp));
 }
 
+static inline u16 eir_append_data(u8 *eir, u16 eir_len, u8 type, u8 *data,
+				  u8 data_len)
+{
+	eir[eir_len++] = sizeof(type) + data_len;
+	eir[eir_len++] = type;
+	memcpy(&eir[eir_len], data, data_len);
+	eir_len += data_len;
+
+	return eir_len;
+}
+
 static int read_ext_controller_info(struct sock *sk, struct hci_dev *hdev,
 				    void *data, u16 data_len)
 {
-	struct mgmt_rp_read_ext_info rp;
+	struct mgmt_rp_read_ext_info *rp;
+	char buff[512];
+	u16 eir_len = 0;
+	u8 name_len;
 
 	BT_DBG("sock %p %s", sk, hdev->name);
 
 	hci_dev_lock(hdev);
 
-	memset(&rp, 0, sizeof(rp));
+	if (hci_dev_test_flag(hdev, HCI_BREDR_ENABLED))
+		eir_len = eir_append_data(buff, eir_len,
+					  EIR_CLASS_OF_DEV,
+					  hdev->dev_class, 3);
 
-	bacpy(&rp.bdaddr, &hdev->bdaddr);
+	name_len = strlen(hdev->dev_name);
+	eir_len = eir_append_data(buff, eir_len, EIR_NAME_COMPLETE,
+				  hdev->dev_name, name_len);
 
-	rp.version = hdev->hci_ver;
-	rp.manufacturer = cpu_to_le16(hdev->manufacturer);
+	name_len = strlen(hdev->short_name);
+	eir_len = eir_append_data(buff, eir_len, EIR_NAME_SHORT,
+				  hdev->short_name, name_len);
 
-	rp.supported_settings = cpu_to_le32(get_supported_settings(hdev));
-	rp.current_settings = cpu_to_le32(get_current_settings(hdev));
+	rp = kmalloc(sizeof(*rp) + eir_len, GFP_KERNEL);
+	if (!rp)
+		return -ENOMEM;
+
+	memset(rp, 0, sizeof(*rp) + eir_len);
+
+	rp->eir_len = cpu_to_le16(eir_len);
+	memcpy(rp->eir, buff, eir_len);
 
-	rp.eir_len = cpu_to_le16(0);
+	bacpy(&rp->bdaddr, &hdev->bdaddr);
+
+	rp->version = hdev->hci_ver;
+	rp->manufacturer = cpu_to_le16(hdev->manufacturer);
+
+	rp->supported_settings = cpu_to_le32(get_supported_settings(hdev));
+	rp->current_settings = cpu_to_le32(get_current_settings(hdev));
 
 	hci_dev_unlock(hdev);
 
@@ -898,8 +930,8 @@ static int read_ext_controller_info(struct sock *sk, struct hci_dev *hdev,
 	hci_sock_clear_flag(sk, HCI_MGMT_DEV_CLASS_EVENTS);
 	hci_sock_clear_flag(sk, HCI_MGMT_LOCAL_NAME_EVENTS);
 
-	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_READ_EXT_INFO, 0, &rp,
-				 sizeof(rp));
+	return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_READ_EXT_INFO, 0, rp,
+				 sizeof(*rp) + eir_len);
 }
 
 static int ext_info_changed(struct hci_dev *hdev, struct sock *skip)
@@ -5552,17 +5584,6 @@ static int set_public_address(struct sock *sk, struct hci_dev *hdev,
 	return err;
 }
 
-static inline u16 eir_append_data(u8 *eir, u16 eir_len, u8 type, u8 *data,
-				  u8 data_len)
-{
-	eir[eir_len++] = sizeof(type) + data_len;
-	eir[eir_len++] = type;
-	memcpy(&eir[eir_len], data, data_len);
-	eir_len += data_len;
-
-	return eir_len;
-}
-
 static void read_local_oob_ext_data_complete(struct hci_dev *hdev, u8 status,
 					     u16 opcode, struct sk_buff *skb)
 {