/*
 * Copyright 2020 Richard Hughes <richard@hughsie.com>
 *
 * SPDX-License-Identifier: LGPL-2.1-or-later
 */

#include "config.h"

#include "fu-acpi-dmar-plugin.h"
#include "fu-acpi-dmar.h"

struct _FuAcpiDmarPlugin {
	FuPlugin parent_instance;
};

G_DEFINE_TYPE(FuAcpiDmarPlugin, fu_acpi_dmar_plugin, FU_TYPE_PLUGIN)

static void
fu_acpi_dmar_plugin_add_security_attrs(FuPlugin *plugin, FuSecurityAttrs *attrs)
{
	FuContext *ctx = fu_plugin_get_context(plugin);
	g_autofree gchar *fn = NULL;
	g_autoptr(FuAcpiDmar) dmar = fu_acpi_dmar_new();
	g_autoptr(FwupdSecurityAttr) attr = NULL;
	g_autoptr(GInputStream) stream = NULL;
	g_autoptr(GError) error_local = NULL;

	/* only Intel */
	if (fu_cpu_get_vendor() != FU_CPU_VENDOR_INTEL)
		return;

	/* create attr */
	attr = fu_plugin_security_attr_new(plugin, FWUPD_SECURITY_ATTR_ID_PREBOOT_DMA_PROTECTION);
	fwupd_security_attr_set_result_success(attr, FWUPD_SECURITY_ATTR_RESULT_ENABLED);
	fu_security_attrs_append(attrs, attr);

	/* load DMAR table */
	fn = fu_context_build_filename(ctx, &error_local, FU_PATH_KIND_ACPI_TABLES, "DMAR", NULL);
	if (fn == NULL) {
		g_debug("failed to build: %s", error_local->message);
		fwupd_security_attr_set_result(attr, FWUPD_SECURITY_ATTR_RESULT_NOT_VALID);
		return;
	}
	stream = fu_input_stream_from_path(fn, &error_local);
	if (stream == NULL) {
		g_debug("failed to load %s: %s", fn, error_local->message);
		fwupd_security_attr_set_result(attr, FWUPD_SECURITY_ATTR_RESULT_NOT_VALID);
		return;
	}
	if (!fu_firmware_parse_stream(FU_FIRMWARE(dmar),
				      stream,
				      0x0,
				      FU_FIRMWARE_PARSE_FLAG_NONE,
				      &error_local)) {
		g_warning("failed to parse %s: %s", fn, error_local->message);
		fwupd_security_attr_set_result(attr, FWUPD_SECURITY_ATTR_RESULT_NOT_VALID);
		return;
	}
	if (!fu_acpi_dmar_get_opt_in(dmar)) {
		fwupd_security_attr_add_flag(attr, FWUPD_SECURITY_ATTR_FLAG_ACTION_CONTACT_OEM);
		fwupd_security_attr_add_flag(attr, FWUPD_SECURITY_ATTR_FLAG_ACTION_CONFIG_FW);
		fwupd_security_attr_set_result(attr, FWUPD_SECURITY_ATTR_RESULT_NOT_ENABLED);
		return;
	}

	/* success */
	fwupd_security_attr_add_flag(attr, FWUPD_SECURITY_ATTR_FLAG_SUCCESS);
}

static void
fu_acpi_dmar_plugin_init(FuAcpiDmarPlugin *self)
{
}

static void
fu_acpi_dmar_plugin_class_init(FuAcpiDmarPluginClass *klass)
{
	FuPluginClass *plugin_class = FU_PLUGIN_CLASS(klass);
	plugin_class->add_security_attrs = fu_acpi_dmar_plugin_add_security_attrs;
}
