[Bluetooth] Add support for extended inquiry responses

This patch adds the handling of the extended inquiry responses and
inserts them into the inquiry cache.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

include/net/bluetooth/hci.h

@@ -463,6 +463,17 @@ struct inquiry_info_with_rssi_and_pscan_mode {
 	__s8     rssi;
 } __attribute__ ((packed));
 
+#define HCI_EV_EXTENDED_INQUIRY_RESULT	0x2F
+struct extended_inquiry_info {
+	bdaddr_t bdaddr;
+	__u8     pscan_rep_mode;
+	__u8     pscan_period_mode;
+	__u8     dev_class[3];
+	__u16    clock_offset;
+	__s8     rssi;
+	__u8     data[240];
+} __attribute__ ((packed));
+
 #define HCI_EV_CONN_COMPLETE 	0x03
 struct hci_ev_conn_complete {
 	__u8     status;

net/bluetooth/hci_event.c

@@ -558,6 +558,35 @@ static inline void hci_inquiry_result_with_rssi_evt(struct hci_dev *hdev, struct
 	hci_dev_unlock(hdev);
 }
 
+/* Extended Inquiry Result */
+static inline void hci_extended_inquiry_result_evt(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	struct inquiry_data data;
+	struct extended_inquiry_info *info = (struct extended_inquiry_info *) (skb->data + 1);
+	int num_rsp = *((__u8 *) skb->data);
+
+	BT_DBG("%s num_rsp %d", hdev->name, num_rsp);
+
+	if (!num_rsp)
+		return;
+
+	hci_dev_lock(hdev);
+
+	for (; num_rsp; num_rsp--) {
+		bacpy(&data.bdaddr, &info->bdaddr);
+		data.pscan_rep_mode     = info->pscan_rep_mode;
+		data.pscan_period_mode  = info->pscan_period_mode;
+		data.pscan_mode         = 0x00;
+		memcpy(data.dev_class, info->dev_class, 3);
+		data.clock_offset       = info->clock_offset;
+		data.rssi               = info->rssi;
+		info++;
+		hci_inquiry_cache_update(hdev, &data);
+	}
+
+	hci_dev_unlock(hdev);
+}
+
 /* Connect Request */
 static inline void hci_conn_request_evt(struct hci_dev *hdev, struct sk_buff *skb)
 {
@@ -940,6 +969,10 @@ void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb)
 		hci_inquiry_result_with_rssi_evt(hdev, skb);
 		break;
 
+	case HCI_EV_EXTENDED_INQUIRY_RESULT:
+		hci_extended_inquiry_result_evt(hdev, skb);
+		break;
+
 	case HCI_EV_CONN_REQUEST:
 		hci_conn_request_evt(hdev, skb);
 		break;