src/basic/af-list.c

   1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
   2
   3 #include <errno.h>
   4 #include <string.h>
   5 #include <sys/socket.h>
   6
   7 #include "af-list.h"
   8 #include "macro.h"
   9
  10 static const struct af_name* lookup_af(register const char *str, register GPERF_LEN_TYPE len);
  11
  12 #include "af-from-name.h"
  13 #include "af-to-name.h"
  14
  15 const char *af_to_name(int id) {
  16
  17         if (id <= 0)
  18                 return NULL;
  19
  20         if ((size_t) id >= ELEMENTSOF(af_names))
  21                 return NULL;
  22
  23         return af_names[id];
  24 }
  25
  26 int af_from_name(const char *name) {
  27         const struct af_name *sc;
  28
  29         assert(name);
  30
  31         sc = lookup_af(name, strlen(name));
  32         if (!sc)
  33                 return -EINVAL;
  34
  35         return sc->id;
  36 }
  37
  38 int af_max(void) {
  39         return ELEMENTSOF(af_names);
  40 }
  41
  42 const char *af_to_ipv4_ipv6(int id) {
  43         /* Pretty often we want to map the address family to the typically used protocol name for IPv4 +
  44          * IPv6. Let's add special helpers for that. */
  45         return id == AF_INET ? "ipv4" :
  46                 id == AF_INET6 ? "ipv6" : NULL;
  47 }
  48
  49 int af_from_ipv4_ipv6(const char *af) {
  50         return streq_ptr(af, "ipv4") ? AF_INET :
  51                 streq_ptr(af, "ipv6") ? AF_INET6 : AF_UNSPEC;
  52 }