src/shared/vlan-util.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2016 Lennart Poettering
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include "vlan-util.h"
  21 #include "parse-util.h"
  22 #include "conf-parser.h"
  23
  24 int parse_vlanid(const char *p, uint16_t *ret) {
  25         uint16_t id;
  26         int r;
  27
  28         r = safe_atou16(p, &id);
  29         if (r < 0)
  30                 return r;
  31         if (!vlanid_is_valid(id))
  32                 return -ERANGE;
  33
  34         *ret = id;
  35         return 0;
  36 }
  37
  38 int config_parse_vlanid(
  39                 const char *unit,
  40                 const char *filename,
  41                 unsigned line,
  42                 const char *section,
  43                 unsigned section_line,
  44                 const char *lvalue,
  45                 int ltype,
  46                 const char *rvalue,
  47                 void *data,
  48                 void *userdata) {
  49
  50         uint16_t *id = data;
  51         int r;
  52
  53         assert(filename);
  54         assert(lvalue);
  55         assert(rvalue);
  56         assert(data);
  57
  58         r = parse_vlanid(rvalue, id);
  59         if (r == -ERANGE) {
  60                 log_syntax(unit, LOG_ERR, filename, line, r, "VLAN identifier outside of valid range 0…4094, ignoring: %s", rvalue);
  61                 return 0;
  62         }
  63         if (r < 0) {
  64                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse VLAN identifier value, ignoring: %s", rvalue);
  65                 return 0;
  66         }
  67
  68         return 0;
  69 }