ea30eb86e5
Check for RES_USE_INET6 before we prefer IPv6 over IPv4, for all our NSS modules. (Not that the DNS resolver that is configured with this matters to us, but hey, let's try to be compatible).
129 lines
6.3 KiB
C
129 lines
6.3 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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#pragma once
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/***
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This file is part of systemd.
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Copyright 2014 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include <nss.h>
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#include <netdb.h>
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#include <resolv.h>
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#define NSS_GETHOSTBYNAME_PROTOTYPES(module) \
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enum nss_status _nss_##module##_gethostbyname4_r( \
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const char *name, \
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struct gaih_addrtuple **pat, \
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char *buffer, size_t buflen, \
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int *errnop, int *h_errnop, \
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int32_t *ttlp) _public_; \
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enum nss_status _nss_##module##_gethostbyname3_r( \
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const char *name, \
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int af, \
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struct hostent *host, \
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char *buffer, size_t buflen, \
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int *errnop, int *h_errnop, \
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int32_t *ttlp, \
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char **canonp) _public_; \
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enum nss_status _nss_##module##_gethostbyname2_r( \
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const char *name, \
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int af, \
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struct hostent *host, \
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char *buffer, size_t buflen, \
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int *errnop, int *h_errnop) _public_; \
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enum nss_status _nss_##module##_gethostbyname_r( \
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const char *name, \
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struct hostent *host, \
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char *buffer, size_t buflen, \
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int *errnop, int *h_errnop) _public_
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#define NSS_GETHOSTBYADDR_PROTOTYPES(module) \
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enum nss_status _nss_##module##_gethostbyaddr2_r( \
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const void* addr, socklen_t len, \
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int af, \
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struct hostent *host, \
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char *buffer, size_t buflen, \
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int *errnop, int *h_errnop, \
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int32_t *ttlp) _public_; \
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enum nss_status _nss_##module##_gethostbyaddr_r( \
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const void* addr, socklen_t len, \
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int af, \
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struct hostent *host, \
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char *buffer, size_t buflen, \
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int *errnop, int *h_errnop) _public_
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#define NSS_GETHOSTBYNAME_FALLBACKS(module) \
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enum nss_status _nss_##module##_gethostbyname2_r( \
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const char *name, \
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int af, \
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struct hostent *host, \
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char *buffer, size_t buflen, \
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int *errnop, int *h_errnop) { \
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return _nss_##module##_gethostbyname3_r( \
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name, \
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af, \
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host, \
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buffer, buflen, \
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errnop, h_errnop, \
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NULL, \
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NULL); \
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} \
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enum nss_status _nss_##module##_gethostbyname_r( \
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const char *name, \
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struct hostent *host, \
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char *buffer, size_t buflen, \
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int *errnop, int *h_errnop) { \
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enum nss_status ret = NSS_STATUS_NOTFOUND; \
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\
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if (_res.options & RES_USE_INET6) \
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ret = _nss_##module##_gethostbyname3_r( \
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name, \
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AF_INET6, \
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host, \
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buffer, buflen, \
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errnop, h_errnop, \
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NULL, \
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NULL); \
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if (ret == NSS_STATUS_NOTFOUND) \
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ret = _nss_##module##_gethostbyname3_r( \
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name, \
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AF_INET, \
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host, \
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buffer, buflen, \
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errnop, h_errnop, \
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NULL, \
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NULL); \
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return ret; \
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}
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#define NSS_GETHOSTBYADDR_FALLBACKS(module) \
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enum nss_status _nss_##module##_gethostbyaddr_r( \
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const void* addr, socklen_t len, \
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int af, \
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struct hostent *host, \
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char *buffer, size_t buflen, \
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int *errnop, int *h_errnop) { \
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return _nss_##module##_gethostbyaddr2_r( \
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addr, len, \
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af, \
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host, \
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buffer, buflen, \
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errnop, h_errnop, \
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NULL); \
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}
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