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Bluetooth: Add support for local name in scan rsp

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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>
This commit is contained in:
Michał Narajowski 2016-09-18 12:50:02 +02:00 committed by Marcel Holtmann
parent 1110a2dbe6
commit 7c295c4801
2 changed files with 64 additions and 10 deletions
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28
net/bluetooth/hci_request.c
View file

@ -971,14 +971,14 @@ void __hci_req_enable_advertising(struct hci_request *req)
hci_req_add(req, HCI_OP_LE_SET_ADV_ENABLE, sizeof(enable), &enable);
}
static u8 create_default_scan_rsp_data(struct hci_dev *hdev, u8 *ptr)
static u8 append_local_name(struct hci_dev *hdev, u8 *ptr, u8 ad_len)
{
u8 ad_len = 0;
size_t name_len;
int max_len;
max_len = HCI_MAX_AD_LENGTH - ad_len - 2;
name_len = strlen(hdev->dev_name);
if (name_len > 0) {
size_t max_len = HCI_MAX_AD_LENGTH - ad_len - 2;
if (name_len > 0 && max_len > 0) {
if (name_len > max_len) {
name_len = max_len;
@ -997,22 +997,34 @@ static u8 create_default_scan_rsp_data(struct hci_dev *hdev, u8 *ptr)
return ad_len;
}
static u8 create_default_scan_rsp_data(struct hci_dev *hdev, u8 *ptr)
{
return append_local_name(hdev, ptr, 0);
}
static u8 create_instance_scan_rsp_data(struct hci_dev *hdev, u8 instance,
u8 *ptr)
{
struct adv_info *adv_instance;
u32 instance_flags;
u8 scan_rsp_len = 0;
adv_instance = hci_find_adv_instance(hdev, instance);
if (!adv_instance)
return 0;
/* TODO: Set the appropriate entries based on advertising instance flags
* here once flags other than 0 are supported.
*/
instance_flags = adv_instance->flags;
memcpy(ptr, adv_instance->scan_rsp_data,
adv_instance->scan_rsp_len);
return adv_instance->scan_rsp_len;
scan_rsp_len += adv_instance->scan_rsp_len;
ptr += adv_instance->scan_rsp_len;
if (instance_flags & MGMT_ADV_FLAG_LOCAL_NAME)
scan_rsp_len = append_local_name(hdev, ptr, scan_rsp_len);
return scan_rsp_len;
}
void __hci_req_update_scan_rsp_data(struct hci_request *req, u8 instance)

46
net/bluetooth/mgmt.c
View file

@ -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;