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Bluetooth: Add framework for Extended Controller Information

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This command is used to retrieve the current state and basic
information of a controller. It is typically used right after
getting the response to the Read Controller Index List command
or an Index Added event (or its extended counterparts).

When any of the values in the EIR_Data field changes, the event
Extended Controller Information Changed will be used to inform
clients about the updated information.

Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Michał Narajowski <michal.narajowski@codecoup.pl>
This commit is contained in:
Marcel Holtmann 2016-09-01 16:46:23 +02:00
parent 418678b01a
commit 321c6feed2
3 changed files with 79 additions and 2 deletions
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1
include/net/bluetooth/hci.h
View File

@ -208,6 +208,7 @@ enum {
HCI_MGMT_INDEX_EVENTS,
HCI_MGMT_UNCONF_INDEX_EVENTS,
HCI_MGMT_EXT_INDEX_EVENTS,
HCI_MGMT_EXT_INFO_EVENTS,
HCI_MGMT_OPTION_EVENTS,
HCI_MGMT_SETTING_EVENTS,
HCI_MGMT_DEV_CLASS_EVENTS,

18
include/net/bluetooth/mgmt.h
View File

@ -586,6 +586,18 @@ struct mgmt_rp_get_adv_size_info {
#define MGMT_OP_START_LIMITED_DISCOVERY 0x0041
#define MGMT_OP_READ_EXT_INFO 0x0042
#define MGMT_READ_EXT_INFO_SIZE 0
struct mgmt_rp_read_ext_info {
bdaddr_t bdaddr;
__u8 version;
__le16 manufacturer;
__le32 supported_settings;
__le32 current_settings;
__le16 eir_len;
__u8 eir[0];
} __packed;
#define MGMT_EV_CMD_COMPLETE 0x0001
struct mgmt_ev_cmd_complete {
__le16 opcode;
@ -800,3 +812,9 @@ struct mgmt_ev_advertising_added {
struct mgmt_ev_advertising_removed {
__u8 instance;
} __packed;
#define MGMT_EV_EXT_INFO_CHANGED 0x0025
struct mgmt_ev_ext_info_changed {
__le16 eir_len;
__u8 eir[0];
} __packed;

62
net/bluetooth/mgmt.c
View File

@ -104,6 +104,7 @@ static const u16 mgmt_commands[] = {
MGMT_OP_REMOVE_ADVERTISING,
MGMT_OP_GET_ADV_SIZE_INFO,
MGMT_OP_START_LIMITED_DISCOVERY,
MGMT_OP_READ_EXT_INFO,
};
static const u16 mgmt_events[] = {
@ -141,6 +142,7 @@ static const u16 mgmt_events[] = {
MGMT_EV_LOCAL_OOB_DATA_UPDATED,
MGMT_EV_ADVERTISING_ADDED,
MGMT_EV_ADVERTISING_REMOVED,
MGMT_EV_EXT_INFO_CHANGED,
};
static const u16 mgmt_untrusted_commands[] = {
@ -149,6 +151,7 @@ static const u16 mgmt_untrusted_commands[] = {
MGMT_OP_READ_UNCONF_INDEX_LIST,
MGMT_OP_READ_CONFIG_INFO,
MGMT_OP_READ_EXT_INDEX_LIST,
MGMT_OP_READ_EXT_INFO,
};
static const u16 mgmt_untrusted_events[] = {
@ -162,6 +165,7 @@ static const u16 mgmt_untrusted_events[] = {
MGMT_EV_NEW_CONFIG_OPTIONS,
MGMT_EV_EXT_INDEX_ADDED,
MGMT_EV_EXT_INDEX_REMOVED,
MGMT_EV_EXT_INFO_CHANGED,
};
#define CACHE_TIMEOUT msecs_to_jiffies(2 * 1000)
@ -862,6 +866,52 @@ static int read_controller_info(struct sock *sk, struct hci_dev *hdev,
sizeof(rp));
}
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;
BT_DBG("sock %p %s", sk, hdev->name);
hci_dev_lock(hdev);
memset(&rp, 0, sizeof(rp));
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));
rp.eir_len = cpu_to_le16(0);
hci_dev_unlock(hdev);
/* If this command is called at least once, then the events
* for class of device and local name changes are disabled
* and only the new extended controller information event
* is used.
*/
hci_sock_set_flag(sk, HCI_MGMT_EXT_INFO_EVENTS);
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));
}
static int ext_info_changed(struct hci_dev *hdev, struct sock *skip)
{
struct mgmt_ev_ext_info_changed ev;
ev.eir_len = cpu_to_le16(0);
return mgmt_limited_event(MGMT_EV_EXT_INFO_CHANGED, hdev, &ev,
sizeof(ev), HCI_MGMT_EXT_INFO_EVENTS, skip);
}
static int send_settings_rsp(struct sock *sk, u16 opcode, struct hci_dev *hdev)
{
__le32 settings = cpu_to_le32(get_current_settings(hdev));
@ -2995,6 +3045,7 @@ static int set_local_name(struct sock *sk, struct hci_dev *hdev, void *data,
err = mgmt_limited_event(MGMT_EV_LOCAL_NAME_CHANGED, hdev, data,
len, HCI_MGMT_LOCAL_NAME_EVENTS, sk);
ext_info_changed(hdev, sk);
goto failed;
}
@ -6356,6 +6407,8 @@ static const struct hci_mgmt_handler mgmt_handlers[] = {
{ remove_advertising, MGMT_REMOVE_ADVERTISING_SIZE },
{ get_adv_size_info, MGMT_GET_ADV_SIZE_INFO_SIZE },
{ start_limited_discovery, MGMT_START_DISCOVERY_SIZE },
{ read_ext_controller_info,MGMT_READ_EXT_INFO_SIZE,
HCI_MGMT_UNTRUSTED },
};
void mgmt_index_added(struct hci_dev *hdev)
@ -6494,10 +6547,12 @@ void __mgmt_power_off(struct hci_dev *hdev)
mgmt_pending_foreach(0, hdev, cmd_complete_rsp, &status);
if (memcmp(hdev->dev_class, zero_cod, sizeof(zero_cod)) != 0)
if (memcmp(hdev->dev_class, zero_cod, sizeof(zero_cod)) != 0) {
mgmt_limited_event(MGMT_EV_CLASS_OF_DEV_CHANGED, hdev,
zero_cod, sizeof(zero_cod),
HCI_MGMT_DEV_CLASS_EVENTS, NULL);
ext_info_changed(hdev, NULL);
}
new_settings(hdev, match.sk);
@ -7093,9 +7148,11 @@ void mgmt_set_class_of_dev_complete(struct hci_dev *hdev, u8 *dev_class,
mgmt_pending_foreach(MGMT_OP_ADD_UUID, hdev, sk_lookup, &match);
mgmt_pending_foreach(MGMT_OP_REMOVE_UUID, hdev, sk_lookup, &match);
if (!status)
if (!status) {
mgmt_limited_event(MGMT_EV_CLASS_OF_DEV_CHANGED, hdev, dev_class,
3, HCI_MGMT_DEV_CLASS_EVENTS, NULL);
ext_info_changed(hdev, NULL);
}
if (match.sk)
sock_put(match.sk);
@ -7126,6 +7183,7 @@ void mgmt_set_local_name_complete(struct hci_dev *hdev, u8 *name, u8 status)
mgmt_limited_event(MGMT_EV_LOCAL_NAME_CHANGED, hdev, &ev, sizeof(ev),
HCI_MGMT_LOCAL_NAME_EVENTS, cmd ? cmd->sk : NULL);
ext_info_changed(hdev, cmd ? cmd->sk : NULL);
}
static inline bool has_uuid(u8 *uuid, u16 uuid_count, u8 (*uuids)[16])