Bluetooth: Shell: Classic: Add command info and select

[lylezhu2012]

• Bluetooth: Shell: Classic: Add command info to get conn info

Add shell command info to get the BR connect info.

• Bluetooth: Shell: Classic: Add command select to select BR connect

Add a shell command select to select a specific BR connect according to the given BR address.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
27.7% Duplication on New Code

See analysis details on SonarQube Cloud

[lylezhu2012]

Just reminder.

[gzh-terry]

Better to have an unselect command, otherwise we can never bt_conn_unref this connection before another conn can be found.

[lylezhu2012]

Because the all commanders use default_conn as the conn handle to access the APIs, we need to use a function to change the default_conn if we want to send the command to specific connection.

The command is used to select a connection from all connections. It just likes as bt select commander.

[gzh-terry]

BTW, what's the behavior when disconnect this conn?
Should we do something to unref it first?
It look like ref and unref are not paired.

[lylezhu2012]

There are three cases to unref the default_conn.

Case 1, the connection default_conn is disconnected.

zephyr/subsys/bluetooth/host/shell/bt.c

Lines 823 to 845 in 46f7313

	if (default_conn == conn) {
	struct bt_conn_info info;
	enum bt_conn_type conn_type = BT_CONN_TYPE_LE;
	if (IS_ENABLED(CONFIG_BT_CLASSIC)) {
	conn_type |= BT_CONN_TYPE_BR;
	}
	bt_conn_get_info(conn, &info);
	bt_conn_unref(default_conn);
	default_conn = NULL;
	/* If we are connected to other devices, set one of them as default */
	bt_conn_foreach(info.type, disconnected_set_new_default_conn_cb, NULL);
	if (default_conn == NULL) {
	bt_conn_foreach(conn_type, disconnected_set_new_default_conn_cb, NULL);
	}
	if (default_conn != NULL) {
	conn_addr_str(default_conn, addr, sizeof(addr));
	bt_shell_print("Selected conn is now: %s", addr);
	}
	}

Case 2, use commander br select or bt select to select other connect.

Case 3, a new connection is connected if it is central role,

zephyr/subsys/bluetooth/host/shell/bt.c

Lines 777 to 783 in 46f7313

	if (info.role == BT_CONN_ROLE_CENTRAL) {
	if (default_conn != NULL) {
	bt_conn_unref(default_conn);
	}
	default_conn = bt_conn_ref(conn);
	} else if (info.role == BT_CONN_ROLE_PERIPHERAL) {

[gzh-terry]

LGTM.