bluetooth: shell: Add shell commands for LE Connection Subrating

Add commands to allow requesting a subrate change via the BT shell.
A new build configuration has been added to ensure this is tested in CI.

Signed-off-by: Aleksandar Stanoev <aleksandar.stanoev@nordicsemi.no>

subsys/bluetooth/shell/bt.c

@@ -974,6 +974,27 @@ void path_loss_threshold_report(struct bt_conn *conn,
 }
 #endif
 
+#if defined(CONFIG_BT_SUBRATING)
+void subrate_changed(struct bt_conn *conn,
+		     const struct bt_conn_le_subrate_changed *params)
+{
+	if (params->status == BT_HCI_ERR_SUCCESS) {
+		shell_print(ctx_shell, "Subrate parameters changed: "
+			    "Subrate Factor: %d "
+			    "Continuation Number: %d "
+			    "Peripheral latency: 0x%04x "
+			    "Supervision timeout: 0x%04x (%d ms)",
+			    params->factor,
+			    params->continuation_number,
+			    params->peripheral_latency,
+			    params->supervision_timeout,
+			    params->supervision_timeout * 10);
+	} else {
+		shell_print(ctx_shell, "Subrate change failed (HCI status 0x%02x)", params->status);
+	}
+}
+#endif
+
 static struct bt_conn_cb conn_callbacks = {
 	.connected = connected,
 	.disconnected = disconnected,
@@ -1000,6 +1021,9 @@ static struct bt_conn_cb conn_callbacks = {
 #if defined(CONFIG_BT_PATH_LOSS_MONITORING)
 	.path_loss_threshold_report = path_loss_threshold_report,
 #endif
+#if defined(CONFIG_BT_SUBRATING)
+	.subrate_changed = subrate_changed,
+#endif
 };
 #endif /* CONFIG_BT_CONN */
 
@@ -3019,6 +3043,74 @@ static int cmd_set_path_loss_reporting_enable(const struct shell *sh, size_t arg
 }
 #endif
 
+#if defined(CONFIG_BT_SUBRATING)
+static int cmd_subrate_set_defaults(const struct shell *sh, size_t argc, char *argv[])
+{
+	int err = 0;
+
+	for (size_t argn = 1; argn < argc; argn++) {
+		(void)shell_strtoul(argv[argn], 10, &err);
+
+		if (err) {
+			shell_help(sh);
+			shell_error(sh, "Could not parse input number %d", argn);
+			return SHELL_CMD_HELP_PRINTED;
+		}
+	}
+
+	const struct bt_conn_le_subrate_param params = {
+		.subrate_min = shell_strtoul(argv[1], 10, &err),
+		.subrate_max = shell_strtoul(argv[2], 10, &err),
+		.max_latency = shell_strtoul(argv[3], 10, &err),
+		.continuation_number = shell_strtoul(argv[4], 10, &err),
+		.supervision_timeout = shell_strtoul(argv[5], 10, &err) * 100, /* 10ms units */
+	};
+
+	err = bt_conn_le_subrate_set_defaults(&params);
+	if (err) {
+		shell_error(sh, "bt_conn_le_subrate_set_defaults returned error %d", err);
+		return -ENOEXEC;
+	}
+
+	return 0;
+}
+
+static int cmd_subrate_request(const struct shell *sh, size_t argc, char *argv[])
+{
+	int err = 0;
+
+	if (default_conn == NULL) {
+		shell_error(sh, "Conn handle error, at least one connection is required.");
+		return -ENOEXEC;
+	}
+
+	for (size_t argn = 1; argn < argc; argn++) {
+		(void)shell_strtoul(argv[argn], 10, &err);
+
+		if (err) {
+			shell_help(sh);
+			shell_error(sh, "Could not parse input number %d", argn);
+			return SHELL_CMD_HELP_PRINTED;
+		}
+	}
+
+	const struct bt_conn_le_subrate_param params = {
+		.subrate_min = shell_strtoul(argv[1], 10, &err),
+		.subrate_max = shell_strtoul(argv[2], 10, &err),
+		.max_latency = shell_strtoul(argv[3], 10, &err),
+		.continuation_number = shell_strtoul(argv[4], 10, &err),
+		.supervision_timeout = shell_strtoul(argv[5], 10, &err) * 100, /* 10ms units */
+	};
+
+	err = bt_conn_le_subrate_request(default_conn, &params);
+	if (err) {
+		shell_error(sh, "bt_conn_le_subrate_request returned error %d", err);
+		return -ENOEXEC;
+	}
+
+	return 0;
+}
+#endif
 
 #if defined(CONFIG_BT_CONN)
 #if defined(CONFIG_BT_CENTRAL)
@@ -3315,6 +3407,12 @@ static int cmd_info(const struct shell *sh, size_t argc, char *argv[])
 			    info.le.data_len->tx_max_time,
 			    info.le.data_len->rx_max_len,
 			    info.le.data_len->rx_max_time);
+#endif
+#if defined(CONFIG_BT_SUBRATING)
+		shell_print(ctx_shell, "LE Subrating: Subrate Factor: %d"
+			    " Continuation Number: %d",
+			    info.le.subrate->factor,
+			    info.le.subrate->continuation_number);
 #endif
 	}
 
@@ -4716,6 +4814,16 @@ SHELL_STATIC_SUBCMD_SET_CREATE(bt_cmds,
 	SHELL_CMD_ARG(path-loss-monitoring-enable, NULL, "<enable: true, false>",
 		      cmd_set_path_loss_reporting_enable, 2, 0),
 #endif
+#if defined(CONFIG_BT_SUBRATING)
+	SHELL_CMD_ARG(subrate-set-defaults, NULL,
+		"<min subrate factor> <max subrate factor> <max peripheral latency> "
+		"<min continuation number> <supervision timeout (seconds)>",
+		cmd_subrate_set_defaults, 6, 0),
+	SHELL_CMD_ARG(subrate-request, NULL,
+		"<min subrate factor> <max subrate factor> <max peripheral latency> "
+		"<min continuation number> <supervision timeout (seconds)>",
+		cmd_subrate_request, 6, 0),
+#endif
 #if defined(CONFIG_BT_BROADCASTER)
 	SHELL_CMD_ARG(advertise, NULL,
 		      "<type: off, on, nconn> [mode: discov, non_discov] "

tests/bluetooth/shell/testcase.yaml

@@ -29,6 +29,13 @@ tests:
     platform_allow:
       - native_posix
     build_only: true
+  bluetooth.shell.subrating:
+    extra_configs:
+      - CONFIG_BT_SUBRATING=y
+      - CONFIG_BT_CTLR=n
+    platform_allow:
+      - native_posix
+    build_only: true
   bluetooth.shell.cdc_acm:
     extra_args:
       - OVERLAY_CONFIG=cdc_acm.conf