tools/genl-request.c

/*
 *  Embedded Linux library
 *
 *  Copyright (C) 2019  Intel Corporation. All rights reserved.
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <stdio.h>
#include <errno.h>
#include <stdint.h>
#include <stdbool.h>
#include <signal.h>

#include <ell/ell.h>

static void do_debug(const char *str, void *user_data)
{
	const char *prefix = user_data;

	l_info("%s%s", prefix, str);
}

static void signal_handler(uint32_t signo, void *user_data)
{
	switch (signo) {
	case SIGINT:
	case SIGTERM:
		l_main_quit();
		break;
	}
}

static void family_requested(const struct l_genl_family_info *info,
							void *user_data)
{
	char **groups;
	char *groupstr;

	if (info == NULL) {
		l_info("Family request failed");
		goto done;
	}

	l_info("Appeared: Family: %s(%u) Version: %u",
			l_genl_family_info_get_name(info),
			l_genl_family_info_get_id(info),
			l_genl_family_info_get_version(info));

	groups = l_genl_family_info_get_groups(info);
	groupstr = l_strjoinv(groups, ',');
	l_strfreev(groups);

	l_info("\tMulticast Groups: %s", groupstr);
	l_free(groupstr);

done:
	l_main_quit();
}

static void usage(const char *bin)
{
	printf("%s - genl family autoload utility\n\n", bin);
	printf("Usage: %s <family_name>\n"
		"  <family_name> - Name of the family to request\n",
		bin);
}

int main(int argc, char *argv[])
{
	struct l_genl *genl;

	if (argc != 2) {
		usage(argv[0]);
		return -1;
	}

	if (!l_main_init())
		return -1;

	l_log_set_stderr();

	genl = l_genl_new();

	if (getenv("GENL_DEBUG"))
		l_genl_set_debug(genl, do_debug, "[GENL] ", NULL);

	if (!l_genl_request_family(genl, argv[1],
					family_requested, NULL, NULL)) {
		l_info("Unable to request family: %s", argv[1]);
		goto done;
	}

	l_main_run_with_signal(signal_handler, NULL);

done:
	l_genl_unref(genl);
	l_main_exit();

	return 0;
}