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Bluetooth: Add support for Get Clock Info mgmt command

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This patch implements support for the Get Clock Information mgmt
command. This is done by performing one or two HCI_Read_Clock commands
and creating the response from the stored values in the hci_dev and
hci_conn structs.

Signed-off-by: Johan Hedberg <johan.hedberg@intel.com>
Signed-off-by: Marcel Holtmann <marcel@holtmann.org>
This commit is contained in:
Johan Hedberg 2014-06-28 17:54:07 +03:00 committed by Marcel Holtmann
parent 33f3572103
commit 958684263d
2 changed files with 156 additions and 0 deletions
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12
include/net/bluetooth/mgmt.h
View File

@ -424,6 +424,18 @@ struct mgmt_rp_get_conn_info {
__s8 max_tx_power;
} __packed;
#define MGMT_OP_GET_CLOCK_INFO 0x0032
struct mgmt_cp_get_clock_info {
struct mgmt_addr_info addr;
} __packed;
#define MGMT_GET_CLOCK_INFO_SIZE MGMT_ADDR_INFO_SIZE
struct mgmt_rp_get_clock_info {
struct mgmt_addr_info addr;
__le32 local_clock;
__le32 piconet_clock;
__le16 accuracy;
} __packed;
#define MGMT_EV_CMD_COMPLETE 0x0001
struct mgmt_ev_cmd_complete {
__le16 opcode;

144
net/bluetooth/mgmt.c
View File

@ -85,6 +85,7 @@ static const u16 mgmt_commands[] = {
MGMT_OP_SET_PRIVACY,
MGMT_OP_LOAD_IRKS,
MGMT_OP_GET_CONN_INFO,
MGMT_OP_GET_CLOCK_INFO,
};
static const u16 mgmt_events[] = {
@ -571,6 +572,22 @@ static struct pending_cmd *mgmt_pending_find(u16 opcode, struct hci_dev *hdev)
return NULL;
}
static struct pending_cmd *mgmt_pending_find_data(u16 opcode,
struct hci_dev *hdev,
const void *data)
{
struct pending_cmd *cmd;
list_for_each_entry(cmd, &hdev->mgmt_pending, list) {
if (cmd->user_data != data)
continue;
if (cmd->opcode == opcode)
return cmd;
}
return NULL;
}
static u8 create_scan_rsp_data(struct hci_dev *hdev, u8 *ptr)
{
u8 ad_len = 0;
@ -4820,6 +4837,132 @@ unlock:
return err;
}
static void get_clock_info_complete(struct hci_dev *hdev, u8 status)
{
struct mgmt_cp_get_clock_info *cp;
struct mgmt_rp_get_clock_info rp;
struct hci_cp_read_clock *hci_cp;
struct pending_cmd *cmd;
struct hci_conn *conn;
BT_DBG("%s status %u", hdev->name, status);
hci_dev_lock(hdev);
hci_cp = hci_sent_cmd_data(hdev, HCI_OP_READ_CLOCK);
if (!hci_cp)
goto unlock;
if (hci_cp->which) {
u16 handle = __le16_to_cpu(hci_cp->handle);
conn = hci_conn_hash_lookup_handle(hdev, handle);
} else {
conn = NULL;
}
cmd = mgmt_pending_find_data(MGMT_OP_GET_CLOCK_INFO, hdev, conn);
if (!cmd)
goto unlock;
cp = cmd->param;
memset(&rp, 0, sizeof(rp));
memcpy(&rp.addr, &cp->addr, sizeof(rp.addr));
if (status)
goto send_rsp;
rp.local_clock = cpu_to_le32(hdev->clock);
if (conn) {
rp.piconet_clock = cpu_to_le32(conn->clock);
rp.accuracy = cpu_to_le16(conn->clock_accuracy);
}
send_rsp:
cmd_complete(cmd->sk, cmd->index, cmd->opcode, mgmt_status(status),
&rp, sizeof(rp));
mgmt_pending_remove(cmd);
if (conn)
hci_conn_drop(conn);
unlock:
hci_dev_unlock(hdev);
}
static int get_clock_info(struct sock *sk, struct hci_dev *hdev, void *data,
u16 len)
{
struct mgmt_cp_get_clock_info *cp = data;
struct mgmt_rp_get_clock_info rp;
struct hci_cp_read_clock hci_cp;
struct pending_cmd *cmd;
struct hci_request req;
struct hci_conn *conn;
int err;
BT_DBG("%s", hdev->name);
memset(&rp, 0, sizeof(rp));
bacpy(&rp.addr.bdaddr, &cp->addr.bdaddr);
rp.addr.type = cp->addr.type;
if (cp->addr.type != BDADDR_BREDR)
return cmd_complete(sk, hdev->id, MGMT_OP_GET_CLOCK_INFO,
MGMT_STATUS_INVALID_PARAMS,
&rp, sizeof(rp));
hci_dev_lock(hdev);
if (!hdev_is_powered(hdev)) {
err = cmd_complete(sk, hdev->id, MGMT_OP_GET_CLOCK_INFO,
MGMT_STATUS_NOT_POWERED, &rp, sizeof(rp));
goto unlock;
}
if (bacmp(&cp->addr.bdaddr, BDADDR_ANY)) {
conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK,
&cp->addr.bdaddr);
if (!conn || conn->state != BT_CONNECTED) {
err = cmd_complete(sk, hdev->id,
MGMT_OP_GET_CLOCK_INFO,
MGMT_STATUS_NOT_CONNECTED,
&rp, sizeof(rp));
goto unlock;
}
} else {
conn = NULL;
}
cmd = mgmt_pending_add(sk, MGMT_OP_GET_CLOCK_INFO, hdev, data, len);
if (!cmd) {
err = -ENOMEM;
goto unlock;
}
hci_req_init(&req, hdev);
memset(&hci_cp, 0, sizeof(hci_cp));
hci_req_add(&req, HCI_OP_READ_CLOCK, sizeof(hci_cp), &hci_cp);
if (conn) {
hci_conn_hold(conn);
cmd->user_data = conn;
hci_cp.handle = cpu_to_le16(conn->handle);
hci_cp.which = 0x01; /* Piconet clock */
hci_req_add(&req, HCI_OP_READ_CLOCK, sizeof(hci_cp), &hci_cp);
}
err = hci_req_run(&req, get_clock_info_complete);
if (err < 0)
mgmt_pending_remove(cmd);
unlock:
hci_dev_unlock(hdev);
return err;
}
static const struct mgmt_handler {
int (*func) (struct sock *sk, struct hci_dev *hdev, void *data,
u16 data_len);
@ -4876,6 +5019,7 @@ static const struct mgmt_handler {
{ set_privacy, false, MGMT_SET_PRIVACY_SIZE },
{ load_irks, true, MGMT_LOAD_IRKS_SIZE },
{ get_conn_info, false, MGMT_GET_CONN_INFO_SIZE },
{ get_clock_info, false, MGMT_GET_CLOCK_INFO_SIZE },
};