1 /* Determine protocol families for which interfaces exist. Generic version.
2 Copyright (C) 2003-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19 #include <ifaddrs.h>
20 #include <netdb.h>
21 #include <stdint.h>
22
23 void
24 attribute_hidden
__check_pf(bool * seen_ipv4,bool * seen_ipv6,struct in6addrinfo ** in6ai,size_t * in6ailen)25 __check_pf (bool *seen_ipv4, bool *seen_ipv6,
26 struct in6addrinfo **in6ai, size_t *in6ailen)
27 {
28 /* By default we have no way to determine information about
29 deprecated and temporary addresses. */
30 *in6ai = NULL;
31 *in6ailen = 0;
32
33 /* Get the interface list via getifaddrs. */
34 struct ifaddrs *ifa = NULL;
35 if (__getifaddrs (&ifa) != 0)
36 {
37 /* We cannot determine what interfaces are available. Be
38 pessimistic. */
39 *seen_ipv4 = true;
40 *seen_ipv6 = true;
41 return;
42 }
43
44 *seen_ipv4 = false;
45 *seen_ipv6 = false;
46
47 struct ifaddrs *runp;
48 for (runp = ifa; runp != NULL; runp = runp->ifa_next)
49 if (runp->ifa_addr->sa_family == PF_INET)
50 *seen_ipv4 = true;
51 else if (runp->ifa_addr->sa_family == PF_INET6)
52 *seen_ipv6 = true;
53
54 (void) __freeifaddrs (ifa);
55 }
56
57
58 void
__free_in6ai(struct in6addrinfo * in6ai)59 __free_in6ai (struct in6addrinfo *in6ai)
60 {
61 /* Nothing to do. */
62 }
63
64
65 #if IS_IN (nscd)
66 uint32_t
__bump_nl_timestamp(void)67 __bump_nl_timestamp (void)
68 {
69 return 0;
70 }
71 #endif
72