Bluetooth: Add support for local name in scan rsp

This patch enables appending local name to scan response data. If
currently advertised instance has name flag set it is expired
immediately.

Signed-off-by: Michał Narajowski <michal.narajowski@codecoup.pl>
Signed-off-by: Szymon Janc <szymon.janc@codecoup.pl>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>

1 files changed, 44 insertions, 2 deletions

diff --git a/net/bluetooth/mgmt.c b/net/bluetooth/mgmt.c
index 0ac881cfc646..89954bb19222 100644
--- a/net/bluetooth/mgmt.c
+++ b/net/bluetooth/mgmt.c
@@ -3012,6 +3012,35 @@ static int user_passkey_neg_reply(struct sock *sk, struct hci_dev *hdev,
 				 HCI_OP_USER_PASSKEY_NEG_REPLY, 0);
 }
 
+static void adv_expire(struct hci_dev *hdev, u32 flags)
+{
+	struct adv_info *adv_instance;
+	struct hci_request req;
+	int err;
+
+	adv_instance = hci_find_adv_instance(hdev, hdev->cur_adv_instance);
+	if (!adv_instance)
+		return;
+
+	/* stop if current instance doesn't need to be changed */
+	if (!(adv_instance->flags & flags))
+		return;
+
+	cancel_adv_timeout(hdev);
+
+	adv_instance = hci_get_next_instance(hdev, adv_instance->instance);
+	if (!adv_instance)
+		return;
+
+	hci_req_init(&req, hdev);
+	err = __hci_req_schedule_adv_instance(&req, adv_instance->instance,
+					      true);
+	if (err)
+		return;
+
+	hci_req_run(&req, NULL);
+}
+
 static void set_name_complete(struct hci_dev *hdev, u8 status, u16 opcode)
 {
 	struct mgmt_cp_set_local_name *cp;
@@ -3027,13 +3056,17 @@ static void set_name_complete(struct hci_dev *hdev, u8 status, u16 opcode)
 
 	cp = cmd->param;
 
-	if (status)
+	if (status) {
 		mgmt_cmd_status(cmd->sk, hdev->id, MGMT_OP_SET_LOCAL_NAME,
 			        mgmt_status(status));
-	else
+	} else {
 		mgmt_cmd_complete(cmd->sk, hdev->id, MGMT_OP_SET_LOCAL_NAME, 0,
 				  cp, sizeof(*cp));
 
+		if (hci_dev_test_flag(hdev, HCI_LE_ADV))
+			adv_expire(hdev, MGMT_ADV_FLAG_LOCAL_NAME);
+	}
+
 	mgmt_pending_remove(cmd);
 
 unlock:
@@ -5885,6 +5918,7 @@ static u32 get_supported_adv_flags(struct hci_dev *hdev)
 	flags |= MGMT_ADV_FLAG_DISCOV;
 	flags |= MGMT_ADV_FLAG_LIMITED_DISCOV;
 	flags |= MGMT_ADV_FLAG_MANAGED_FLAGS;
+	flags |= MGMT_ADV_FLAG_LOCAL_NAME;
 
 	if (hdev->adv_tx_power != HCI_TX_POWER_INVALID)
 		flags |= MGMT_ADV_FLAG_TX_POWER;
@@ -5961,6 +5995,10 @@ static bool tlv_data_is_valid(struct hci_dev *hdev, u32 adv_flags, u8 *data,
 			tx_power_managed = true;
 			max_len -= 3;
 		}
+	} else {
+		/* at least 1 byte of name should fit in */
+		if (adv_flags & MGMT_ADV_FLAG_LOCAL_NAME)
+			max_len -= 3;
 	}
 
 	if (len > max_len)
@@ -6293,6 +6331,10 @@ static u8 tlv_data_max_len(u32 adv_flags, bool is_adv_data)
 
 		if (adv_flags & MGMT_ADV_FLAG_TX_POWER)
 			max_len -= 3;
+	} else {
+		/* at least 1 byte of name should fit in */
+		if (adv_flags & MGMT_ADV_FLAG_LOCAL_NAME)
+			max_len -= 3;
 	}
 
 	return max_len;