| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | /* Determine protocol families for which interfaces exist. Generic version. |
| 2 | Copyright (C) 2003-2015 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 | <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include <ifaddrs.h> |
| 20 | #include <netdb.h> |
| 21 | #include <stdint.h> |
| 22 | |
| 23 | void |
| 24 | attribute_hidden |
| 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 |
| 59 | __free_in6ai (struct in6addrinfo *in6ai) |
| 60 | { |
| 61 | /* Nothing to do. */ |
| 62 | } |
| 63 | |
| 64 | |
| 65 | #if IS_IN (nscd) |
| 66 | uint32_t |
| 67 | __bump_nl_timestamp (void) |
| 68 | { |
| 69 | return 0; |
| 70 | } |
| 71 | #endif |