networkd: Add a container for links

[network.git] / src / networkd / link.c

/*#############################################################################
#                                                                             #
# IPFire.org - A linux based firewall                                         #
# Copyright (C) 2023 IPFire Network Development Team                          #
#                                                                             #
# This program is free software: you can redistribute it and/or modify        #
# it under the terms of the GNU General Public License as published by        #
# the Free Software Foundation, either version 3 of the License, or           #
# (at your option) any later version.                                         #
#                                                                             #
# This program 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 General Public License for more details.                                #
#                                                                             #
# You should have received a copy of the GNU General Public License           #
# along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
#                                                                             #
#############################################################################*/

#include <stddef.h>
#include <stdlib.h>

#include "daemon.h"
#include "link.h"

struct nw_link {
	struct nw_daemon* daemon;
	int nrefs;

	// Interface Index
	int ifindex;
};

int nw_link_create(struct nw_link** link, struct nw_daemon* daemon, int ifindex) {
	// Allocate a new object
	struct nw_link* l = calloc(1, sizeof(*l));
	if (!l)
		return 1;

	// Store a reference to the daemon
	l->daemon = nw_daemon_ref(daemon);

	// Initialize the reference counter
	l->nrefs = 1;

	// Store the ifindex
	l->ifindex = ifindex;

	*link = l;

	return 0;
}

static void nw_link_free(struct nw_link* link) {
	if (link->daemon)
		nw_daemon_unref(link->daemon);
}

struct nw_link* nw_link_ref(struct nw_link* link) {
	link->nrefs++;

	return link;
}

struct nw_link* nw_link_unref(struct nw_link* link) {
	if (--link->nrefs > 0)
		return link;

	nw_link_free(link);
	return NULL;
}