src/basic/arphrd-util.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <errno.h>
   4 #include <netinet/in.h>
   5 #include <linux/if_arp.h>
   6 #include <linux/if_infiniband.h>
   7 #include <string.h>
   8
   9 #include "arphrd-util.h"
  10 #include "macro.h"
  11
  12 static const struct arphrd_name* lookup_arphrd(register const char *str, register GPERF_LEN_TYPE len);
  13
  14 #include "arphrd-from-name.h"
  15 #include "arphrd-to-name.h"
  16
  17 int arphrd_from_name(const char *name) {
  18         const struct arphrd_name *sc;
  19
  20         assert(name);
  21
  22         sc = lookup_arphrd(name, strlen(name));
  23         if (!sc)
  24                 return -EINVAL;
  25
  26         return sc->id;
  27 }
  28
  29 size_t arphrd_to_hw_addr_len(uint16_t arphrd) {
  30         switch (arphrd) {
  31         case ARPHRD_ETHER:
  32                 return ETH_ALEN;
  33         case ARPHRD_INFINIBAND:
  34                 return INFINIBAND_ALEN;
  35         case ARPHRD_TUNNEL:
  36         case ARPHRD_SIT:
  37         case ARPHRD_IPGRE:
  38                 return sizeof(struct in_addr);
  39         case ARPHRD_TUNNEL6:
  40         case ARPHRD_IP6GRE:
  41                 return sizeof(struct in6_addr);
  42         default:
  43                 return 0;
  44         }
  45 }