src/basic/arphrd-list.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd.
   4
   5   Copyright 2014 Lennart Poettering
   6 ***/
   7
   8 #include <net/if_arp.h>
   9 #include <string.h>
  10
  11 #include "arphrd-list.h"
  12 #include "macro.h"
  13
  14 static const struct arphrd_name* lookup_arphrd(register const char *str, register GPERF_LEN_TYPE len);
  15
  16 #include "arphrd-from-name.h"
  17 #include "arphrd-to-name.h"
  18
  19 const char *arphrd_to_name(int id) {
  20
  21         if (id <= 0)
  22                 return NULL;
  23
  24         if (id >= (int) ELEMENTSOF(arphrd_names))
  25                 return NULL;
  26
  27         return arphrd_names[id];
  28 }
  29
  30 int arphrd_from_name(const char *name) {
  31         const struct arphrd_name *sc;
  32
  33         assert(name);
  34
  35         sc = lookup_arphrd(name, strlen(name));
  36         if (!sc)
  37                 return 0;
  38
  39         return sc->id;
  40 }
  41
  42 int arphrd_max(void) {
  43         return ELEMENTSOF(arphrd_names);
  44 }