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Bluetooth: Add get/set device flags mgmt op 

Add the get device flags and set device flags mgmt ops and the device
flags changed event. Their behavior is described in detail in
mgmt-api.txt in bluez.

Sample btmon trace when a HID device is added (trimmed to 75 chars):

@ MGMT Command: Unknown (0x0050) plen 11        {0x0001} [hci0] 18:06:14.98
        90 c5 13 cd f3 cd 02 01 00 00 00                 ...........
@ MGMT Event: Unknown (0x002a) plen 15          {0x0004} [hci0] 18:06:14.98
        90 c5 13 cd f3 cd 02 01 00 00 00 01 00 00 00     ...............
@ MGMT Event: Unknown (0x002a) plen 15          {0x0003} [hci0] 18:06:14.98
        90 c5 13 cd f3 cd 02 01 00 00 00 01 00 00 00     ...............
@ MGMT Event: Unknown (0x002a) plen 15          {0x0002} [hci0] 18:06:14.98
        90 c5 13 cd f3 cd 02 01 00 00 00 01 00 00 00     ...............
@ MGMT Event: Command Compl.. (0x0001) plen 10  {0x0001} [hci0] 18:06:14.98
      Unknown (0x0050) plen 7
        Status: Success (0x00)
        90 c5 13 cd f3 cd 02                             .......
@ MGMT Command: Add Device (0x0033) plen 8      {0x0001} [hci0] 18:06:14.98
        LE Address: CD:F3:CD:13:C5:90 (Static)
        Action: Auto-connect remote device (0x02)
@ MGMT Event: Device Added (0x001a) plen 8      {0x0004} [hci0] 18:06:14.98
        LE Address: CD:F3:CD:13:C5:90 (Static)
        Action: Auto-connect remote device (0x02)
@ MGMT Event: Device Added (0x001a) plen 8      {0x0003} [hci0] 18:06:14.98
        LE Address: CD:F3:CD:13:C5:90 (Static)
        Action: Auto-connect remote device (0x02)
@ MGMT Event: Device Added (0x001a) plen 8      {0x0002} [hci0] 18:06:14.98
        LE Address: CD:F3:CD:13:C5:90 (Static)
        Action: Auto-connect remote device (0x02)
@ MGMT Event: Unknown (0x002a) plen 15          {0x0004} [hci0] 18:06:14.98
        90 c5 13 cd f3 cd 02 01 00 00 00 01 00 00 00     ...............
@ MGMT Event: Unknown (0x002a) plen 15          {0x0003} [hci0] 18:06:14.98
        90 c5 13 cd f3 cd 02 01 00 00 00 01 00 00 00     ...............
@ MGMT Event: Unknown (0x002a) plen 15          {0x0002} [hci0] 18:06:14.98
        90 c5 13 cd f3 cd 02 01 00 00 00 01 00 00 00     ...............
@ MGMT Event: Unknown (0x002a) plen 15          {0x0001} [hci0] 18:06:14.98
        90 c5 13 cd f3 cd 02 01 00 00 00 01 00 00 00     ...............

Signed-off-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Reviewed-by: Alain Michaud <alainm@chromium.org>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
This commit is contained in:
Abhishek Pandit-Subedi 2020-06-17 16:39:11 +02:00 коммит произвёл Johan Hedberg
Родитель a1fc7535ec
Коммит 4c54bf2b09
2 изменённых файлов: 156 добавлений и 0 удалений
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28
include/net/bluetooth/mgmt.h
Просмотреть файл

@ -720,6 +720,27 @@ struct mgmt_rp_set_exp_feature {
#define MGMT_OP_SET_DEF_RUNTIME_CONFIG 0x004e
#define MGMT_SET_DEF_RUNTIME_CONFIG_SIZE 0
#define MGMT_OP_GET_DEVICE_FLAGS 0x004F
#define MGMT_GET_DEVICE_FLAGS_SIZE 7
struct mgmt_cp_get_device_flags {
struct mgmt_addr_info addr;
} __packed;
struct mgmt_rp_get_device_flags {
struct mgmt_addr_info addr;
__le32 supported_flags;
__le32 current_flags;
} __packed;
#define MGMT_OP_SET_DEVICE_FLAGS 0x0050
#define MGMT_SET_DEVICE_FLAGS_SIZE 11
struct mgmt_cp_set_device_flags {
struct mgmt_addr_info addr;
__le32 current_flags;
} __packed;
struct mgmt_rp_set_device_flags {
struct mgmt_addr_info addr;
} __packed;
#define MGMT_EV_CMD_COMPLETE 0x0001
struct mgmt_ev_cmd_complete {
__le16 opcode;
@ -951,3 +972,10 @@ struct mgmt_ev_exp_feature_changed {
__u8 uuid[16];
__le32 flags;
} __packed;
#define MGMT_EV_DEVICE_FLAGS_CHANGED 0x002a
struct mgmt_ev_device_flags_changed {
struct mgmt_addr_info addr;
__le32 supported_flags;
__le32 current_flags;
} __packed;

128
net/bluetooth/mgmt.c
Просмотреть файл

@ -116,6 +116,8 @@ static const u16 mgmt_commands[] = {
MGMT_OP_SET_DEF_SYSTEM_CONFIG,
MGMT_OP_READ_DEF_RUNTIME_CONFIG,
MGMT_OP_SET_DEF_RUNTIME_CONFIG,
MGMT_OP_GET_DEVICE_FLAGS,
MGMT_OP_SET_DEVICE_FLAGS,
};
static const u16 mgmt_events[] = {
@ -156,6 +158,7 @@ static const u16 mgmt_events[] = {
MGMT_EV_EXT_INFO_CHANGED,
MGMT_EV_PHY_CONFIGURATION_CHANGED,
MGMT_EV_EXP_FEATURE_CHANGED,
MGMT_EV_DEVICE_FLAGS_CHANGED,
};
static const u16 mgmt_untrusted_commands[] = {
@ -3856,6 +3859,120 @@ static int set_exp_feature(struct sock *sk, struct hci_dev *hdev,
MGMT_STATUS_NOT_SUPPORTED);
}
#define SUPPORTED_DEVICE_FLAGS() ((1U << HCI_CONN_FLAG_MAX) - 1)
static int get_device_flags(struct sock *sk, struct hci_dev *hdev, void *data,
u16 data_len)
{
struct mgmt_cp_get_device_flags *cp = data;
struct mgmt_rp_get_device_flags rp;
struct bdaddr_list_with_flags *br_params;
struct hci_conn_params *params;
u32 supported_flags = SUPPORTED_DEVICE_FLAGS();
u32 current_flags = 0;
u8 status = MGMT_STATUS_INVALID_PARAMS;
bt_dev_dbg(hdev, "Get device flags %pMR (type 0x%x)\n",
&cp->addr.bdaddr, cp->addr.type);
if (cp->addr.type == BDADDR_BREDR) {
br_params = hci_bdaddr_list_lookup_with_flags(&hdev->whitelist,
&cp->addr.bdaddr,
cp->addr.type);
if (!br_params)
goto done;
current_flags = br_params->current_flags;
} else {
params = hci_conn_params_lookup(hdev, &cp->addr.bdaddr,
le_addr_type(cp->addr.type));
if (!params)
goto done;
current_flags = params->current_flags;
}
bacpy(&rp.addr.bdaddr, &cp->addr.bdaddr);
rp.addr.type = cp->addr.type;
rp.supported_flags = cpu_to_le32(supported_flags);
rp.current_flags = cpu_to_le32(current_flags);
status = MGMT_STATUS_SUCCESS;
done:
return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_GET_DEVICE_FLAGS, status,
&rp, sizeof(rp));
}
static void device_flags_changed(struct sock *sk, struct hci_dev *hdev,
bdaddr_t *bdaddr, u8 bdaddr_type,
u32 supported_flags, u32 current_flags)
{
struct mgmt_ev_device_flags_changed ev;
bacpy(&ev.addr.bdaddr, bdaddr);
ev.addr.type = bdaddr_type;
ev.supported_flags = cpu_to_le32(supported_flags);
ev.current_flags = cpu_to_le32(current_flags);
mgmt_event(MGMT_EV_DEVICE_FLAGS_CHANGED, hdev, &ev, sizeof(ev), sk);
}
static int set_device_flags(struct sock *sk, struct hci_dev *hdev, void *data,
u16 len)
{
struct mgmt_cp_set_device_flags *cp = data;
struct bdaddr_list_with_flags *br_params;
struct hci_conn_params *params;
u8 status = MGMT_STATUS_INVALID_PARAMS;
u32 supported_flags = SUPPORTED_DEVICE_FLAGS();
u32 current_flags = __le32_to_cpu(cp->current_flags);
bt_dev_dbg(hdev, "Set device flags %pMR (type 0x%x) = 0x%x",
&cp->addr.bdaddr, cp->addr.type,
__le32_to_cpu(current_flags));
if ((supported_flags | current_flags) != supported_flags) {
bt_dev_warn(hdev, "Bad flag given (0x%x) vs supported (0x%0x)",
current_flags, supported_flags);
goto done;
}
if (cp->addr.type == BDADDR_BREDR) {
br_params = hci_bdaddr_list_lookup_with_flags(&hdev->whitelist,
&cp->addr.bdaddr,
cp->addr.type);
if (br_params) {
br_params->current_flags = current_flags;
status = MGMT_STATUS_SUCCESS;
} else {
bt_dev_warn(hdev, "No such BR/EDR device %pMR (0x%x)",
&cp->addr.bdaddr, cp->addr.type);
}
} else {
params = hci_conn_params_lookup(hdev, &cp->addr.bdaddr,
le_addr_type(cp->addr.type));
if (params) {
params->current_flags = current_flags;
status = MGMT_STATUS_SUCCESS;
} else {
bt_dev_warn(hdev, "No such LE device %pMR (0x%x)",
&cp->addr.bdaddr,
le_addr_type(cp->addr.type));
}
}
done:
if (status == MGMT_STATUS_SUCCESS)
device_flags_changed(sk, hdev, &cp->addr.bdaddr, cp->addr.type,
supported_flags, current_flags);
return mgmt_cmd_complete(sk, hdev->id, MGMT_OP_SET_DEVICE_FLAGS, status,
&cp->addr, sizeof(cp->addr));
}
static void read_local_oob_data_complete(struct hci_dev *hdev, u8 status,
u16 opcode, struct sk_buff *skb)
{
@ -5973,7 +6090,9 @@ static int add_device(struct sock *sk, struct hci_dev *hdev,
{
struct mgmt_cp_add_device *cp = data;
u8 auto_conn, addr_type;
struct hci_conn_params *params;
int err;
u32 current_flags = 0;
bt_dev_dbg(hdev, "sock %p", sk);
@ -6041,12 +6160,19 @@ static int add_device(struct sock *sk, struct hci_dev *hdev,
MGMT_STATUS_FAILED, &cp->addr,
sizeof(cp->addr));
goto unlock;
} else {
params = hci_conn_params_lookup(hdev, &cp->addr.bdaddr,
addr_type);
if (params)
current_flags = params->current_flags;
}
hci_update_background_scan(hdev);
added:
device_added(sk, hdev, &cp->addr.bdaddr, cp->addr.type, cp->action);
device_flags_changed(NULL, hdev, &cp->addr.bdaddr, cp->addr.type,
SUPPORTED_DEVICE_FLAGS(), current_flags);
err = mgmt_cmd_complete(sk, hdev->id, MGMT_OP_ADD_DEVICE,
MGMT_STATUS_SUCCESS, &cp->addr,
@ -7313,6 +7439,8 @@ static const struct hci_mgmt_handler mgmt_handlers[] = {
HCI_MGMT_UNTRUSTED },
{ set_def_runtime_config, MGMT_SET_DEF_RUNTIME_CONFIG_SIZE,
HCI_MGMT_VAR_LEN },
{ get_device_flags, MGMT_GET_DEVICE_FLAGS_SIZE },
{ set_device_flags, MGMT_SET_DEVICE_FLAGS_SIZE },
};
void mgmt_index_added(struct hci_dev *hdev)