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 
af_to_name(int id)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 
af_from_name(const char * name)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 
af_max(void)38 int af_max(void) {
39         return ELEMENTSOF(af_names);
40 }
41 
af_to_ipv4_ipv6(int id)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 
af_from_ipv4_ipv6(const char * af)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 }
53