src/shared/vlan-util.h

#pragma once

/***
  This file is part of systemd.

  Copyright 2016 Lennart Poettering

  systemd 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.

  systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>.
***/

#include <stdbool.h>
#include <inttypes.h>

#define VLANID_MAX 4094
#define VLANID_INVALID UINT16_MAX

/* Note that we permit VLAN Id 0 here, as that is apparently OK by the Linux kernel */
static inline bool vlanid_is_valid(uint16_t id) {
        return id <= VLANID_MAX;
}

int parse_vlanid(const char *p, uint16_t *ret);

int config_parse_vlanid(const char *unit, const char *filename, unsigned line, const char *section, unsigned section_line, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);