src/shared/vlan-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include "conf-parser.h"
   4 #include "parse-util.h"
   5 #include "string-util.h"
   6 #include "vlan-util.h"
   7
   8 int parse_vlanid(const char *p, uint16_t *ret) {
   9         uint16_t id;
  10         int r;
  11
  12         assert(p);
  13         assert(ret);
  14
  15         r = safe_atou16(p, &id);
  16         if (r < 0)
  17                 return r;
  18         if (!vlanid_is_valid(id))
  19                 return -ERANGE;
  20
  21         *ret = id;
  22         return 0;
  23 }
  24
  25 int parse_vid_range(const char *p, uint16_t *vid, uint16_t *vid_end) {
  26         unsigned lower, upper;
  27         int r;
  28
  29         r = parse_range(p, &lower, &upper);
  30         if (r < 0)
  31                 return r;
  32
  33         if (lower > VLANID_MAX || upper > VLANID_MAX || lower > upper)
  34                 return -EINVAL;
  35
  36         *vid = lower;
  37         *vid_end = upper;
  38         return 0;
  39 }
  40
  41 int config_parse_default_port_vlanid(
  42                 const char *unit,
  43                 const char *filename,
  44                 unsigned line,
  45                 const char *section,
  46                 unsigned section_line,
  47                 const char *lvalue,
  48                 int ltype,
  49                 const char *rvalue,
  50                 void *data,
  51                 void *userdata) {
  52         uint16_t *id = ASSERT_PTR(data);
  53
  54         assert(lvalue);
  55         assert(rvalue);
  56
  57         if (streq(rvalue, "none")) {
  58                 *id = 0;
  59                 return 0;
  60         }
  61
  62         return config_parse_vlanid(unit, filename, line, section, section_line,
  63                                    lvalue, ltype, rvalue, data, userdata);
  64 }
  65
  66 int config_parse_vlanid(
  67                 const char *unit,
  68                 const char *filename,
  69                 unsigned line,
  70                 const char *section,
  71                 unsigned section_line,
  72                 const char *lvalue,
  73                 int ltype,
  74                 const char *rvalue,
  75                 void *data,
  76                 void *userdata) {
  77
  78         uint16_t *id = ASSERT_PTR(data);
  79         int r;
  80
  81         assert(filename);
  82         assert(lvalue);
  83         assert(rvalue);
  84
  85         r = parse_vlanid(rvalue, id);
  86         if (r == -ERANGE) {
  87                 log_syntax(unit, LOG_WARNING, filename, line, r,
  88                            "VLAN identifier outside of valid range 0…4094, ignoring: %s", rvalue);
  89                 return 0;
  90         }
  91         if (r < 0) {
  92                 log_syntax(unit, LOG_WARNING, filename, line, r,
  93                            "Failed to parse VLAN identifier value, ignoring: %s", rvalue);
  94                 return 0;
  95         }
  96
  97         return 0;
  98 }