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 "conf-parser.h"
  21 #include "parse-util.h"
  22 #include "string-util.h"
  23 #include "vlan-util.h"
  24
  25 int parse_vlanid(const char *p, uint16_t *ret) {
  26         uint16_t id;
  27         int r;
  28
  29         r = safe_atou16(p, &id);
  30         if (r < 0)
  31                 return r;
  32         if (!vlanid_is_valid(id))
  33                 return -ERANGE;
  34
  35         *ret = id;
  36         return 0;
  37 }
  38
  39 int config_parse_default_port_vlanid(
  40                 const char *unit,
  41                 const char *filename,
  42                 unsigned line,
  43                 const char *section,
  44                 unsigned section_line,
  45                 const char *lvalue,
  46                 int ltype,
  47                 const char *rvalue,
  48                 void *data,
  49                 void *userdata) {
  50         uint16_t *id = data;
  51
  52         assert(lvalue);
  53         assert(rvalue);
  54         assert(data);
  55
  56         if (streq(rvalue, "none")) {
  57                 *id = 0;
  58                 return 0;
  59         }
  60
  61         return config_parse_vlanid(unit, filename, line, section, section_line,
  62                                    lvalue, ltype, rvalue, data, userdata);
  63 }
  64
  65 int config_parse_vlanid(
  66                 const char *unit,
  67                 const char *filename,
  68                 unsigned line,
  69                 const char *section,
  70                 unsigned section_line,
  71                 const char *lvalue,
  72                 int ltype,
  73                 const char *rvalue,
  74                 void *data,
  75                 void *userdata) {
  76
  77         uint16_t *id = data;
  78         int r;
  79
  80         assert(filename);
  81         assert(lvalue);
  82         assert(rvalue);
  83         assert(data);
  84
  85         r = parse_vlanid(rvalue, id);
  86         if (r == -ERANGE) {
  87                 log_syntax(unit, LOG_ERR, filename, line, r, "VLAN identifier outside of valid range 0…4094, ignoring: %s", rvalue);
  88                 return 0;
  89         }
  90         if (r < 0) {
  91                 log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse VLAN identifier value, ignoring: %s", rvalue);
  92                 return 0;
  93         }
  94
  95         return 0;
  96 }