// SPDX-License-Identifier: GPL-2.0+

/*

 * Copyright (C) 2016 Red Hat, Inc.

 */

#include "nm-default.h"

#include "nm-ppp-manager-call.h"

#include <sys/types.h>

#include <sys/stat.h>

#include "nm-manager.h"

#include "nm-core-utils.h"

#include "nm-ppp-plugin-api.h"

#define PPP_PLUGIN_PATH NMPLUGINDIR "/libnm-ppp-plugin.so"

/*****************************************************************************/

static NMPPPOps *ppp_ops = NULL;

NMPPPManager *

nm_ppp_manager_create (const char *iface, GError **error)

{

	NMPPPManager *ret;

	GModule *plugin;

	GError *error_local = NULL;

	NMPPPOps *ops;

	struct stat st;

	if (G_UNLIKELY (!ppp_ops)) {

		if (stat (PPP_PLUGIN_PATH, &st) != 0) {

			g_set_error_literal (error,

			                     NM_MANAGER_ERROR, NM_MANAGER_ERROR_MISSING_PLUGIN,

			                     "the PPP plugin " PPP_PLUGIN_PATH " is not installed");

			return NULL;

		}

		if (!nm_utils_validate_plugin (PPP_PLUGIN_PATH, &st, &error_local)) {

			g_set_error (error, NM_MANAGER_ERROR, NM_MANAGER_ERROR_MISSING_PLUGIN,

			             "could not load the PPP plugin " PPP_PLUGIN_PATH ": %s",

			             error_local->message);

			g_clear_error (&error_local);

			return NULL;

		}

		plugin = g_module_open (PPP_PLUGIN_PATH, G_MODULE_BIND_LOCAL);

		if (!plugin) {

			g_set_error (error, NM_MANAGER_ERROR, NM_MANAGER_ERROR_MISSING_PLUGIN,

			             "could not load the PPP plugin " PPP_PLUGIN_PATH ": %s",

			             g_module_error ());

			return NULL;

		}

		if (!g_module_symbol (plugin, "ppp_ops", (gpointer) &ops)) {

			g_set_error (error, NM_MANAGER_ERROR, NM_MANAGER_ERROR_MISSING_PLUGIN,

			             "error loading the PPP plugin: %s", g_module_error ());

			return NULL;

		}

		/* after loading glib types from the plugin, we cannot unload the library anymore.

		 * Make it resident. */

		g_module_make_resident (plugin);

		nm_assert (ops);

		nm_assert (ops->create);

		nm_assert (ops->start);

		nm_assert (ops->stop);

		nm_assert (ops->stop_cancel);

		ppp_ops = ops;

		nm_log_info (LOGD_CORE | LOGD_PPP, "loaded PPP plugin " PPP_PLUGIN_PATH);

	}

	ret = ppp_ops->create (iface);

	g_return_val_if_fail (ret, NULL);

	return ret;

}

void

nm_ppp_manager_set_route_parameters (NMPPPManager *self,

                                     guint32 ip4_route_table,

                                     guint32 ip4_route_metric,

                                     guint32 ip6_route_table,

                                     guint32 ip6_route_metric)

{

	g_return_if_fail (ppp_ops);

	ppp_ops->set_route_parameters (self,

	                               ip4_route_table,

	                               ip4_route_metric,

	                               ip6_route_table,

	                               ip6_route_metric);

}

gboolean

nm_ppp_manager_start (NMPPPManager *self,

                      NMActRequest *req,

                      const char *ppp_name,

                      guint32 timeout_secs,

                      guint baud_override,

                      GError **err)

{

	g_return_val_if_fail (ppp_ops, FALSE);

	return ppp_ops->start (self, req, ppp_name, timeout_secs, baud_override, err);

}

NMPPPManagerStopHandle *

nm_ppp_manager_stop (NMPPPManager *self,

                     GCancellable *cancellable,

                     NMPPPManagerStopCallback callback,

                     gpointer user_data)

{

	g_return_val_if_fail (ppp_ops, NULL);

	return ppp_ops->stop (self, cancellable, callback, user_data);

}

void

nm_ppp_manager_stop_cancel (NMPPPManagerStopHandle *handle)

{

	g_return_if_fail (ppp_ops);

	g_return_if_fail (handle);

	ppp_ops->stop_cancel (handle);

}