src/shared/nss-util.h

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 #pragma once
   4
   5 /***
   6   This file is part of systemd.
   7
   8   Copyright 2014 Lennart Poettering
   9
  10   systemd is free software; you can redistribute it and/or modify it
  11   under the terms of the GNU Lesser General Public License as published by
  12   the Free Software Foundation; either version 2.1 of the License, or
  13   (at your option) any later version.
  14
  15   systemd is distributed in the hope that it will be useful, but
  16   WITHOUT ANY WARRANTY; without even the implied warranty of
  17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18   Lesser General Public License for more details.
  19
  20   You should have received a copy of the GNU Lesser General Public License
  21   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  22 ***/
  23
  24 #include <nss.h>
  25 #include <netdb.h>
  26 #include <resolv.h>
  27
  28 #define NSS_GETHOSTBYNAME_PROTOTYPES(module)            \
  29 enum nss_status _nss_##module##_gethostbyname4_r(       \
  30                 const char *name,                       \
  31                 struct gaih_addrtuple **pat,            \
  32                 char *buffer, size_t buflen,            \
  33                 int *errnop, int *h_errnop,             \
  34                 int32_t *ttlp) _public_;                \
  35 enum nss_status _nss_##module##_gethostbyname3_r(       \
  36                 const char *name,                       \
  37                 int af,                                 \
  38                 struct hostent *host,                   \
  39                 char *buffer, size_t buflen,            \
  40                 int *errnop, int *h_errnop,             \
  41                 int32_t *ttlp,                          \
  42                 char **canonp) _public_;                \
  43 enum nss_status _nss_##module##_gethostbyname2_r(       \
  44                 const char *name,                       \
  45                 int af,                                 \
  46                 struct hostent *host,                   \
  47                 char *buffer, size_t buflen,            \
  48                 int *errnop, int *h_errnop) _public_;   \
  49 enum nss_status _nss_##module##_gethostbyname_r(        \
  50                 const char *name,                       \
  51                 struct hostent *host,                   \
  52                 char *buffer, size_t buflen,            \
  53                 int *errnop, int *h_errnop) _public_
  54
  55 #define NSS_GETHOSTBYADDR_PROTOTYPES(module)            \
  56 enum nss_status _nss_##module##_gethostbyaddr2_r(       \
  57                 const void* addr, socklen_t len,        \
  58                 int af,                                 \
  59                 struct hostent *host,                   \
  60                 char *buffer, size_t buflen,            \
  61                 int *errnop, int *h_errnop,             \
  62                 int32_t *ttlp) _public_;                \
  63 enum nss_status _nss_##module##_gethostbyaddr_r(        \
  64                 const void* addr, socklen_t len,        \
  65                 int af,                                 \
  66                 struct hostent *host,                   \
  67                 char *buffer, size_t buflen,            \
  68                 int *errnop, int *h_errnop) _public_
  69
  70 #define NSS_GETHOSTBYNAME_FALLBACKS(module)             \
  71 enum nss_status _nss_##module##_gethostbyname2_r(       \
  72                 const char *name,                       \
  73                 int af,                                 \
  74                 struct hostent *host,                   \
  75                 char *buffer, size_t buflen,            \
  76                 int *errnop, int *h_errnop) {           \
  77         return _nss_##module##_gethostbyname3_r(        \
  78                         name,                           \
  79                         af,                             \
  80                         host,                           \
  81                         buffer, buflen,                 \
  82                         errnop, h_errnop,               \
  83                         NULL,                           \
  84                         NULL);                          \
  85 }                                                       \
  86 enum nss_status _nss_##module##_gethostbyname_r(        \
  87                 const char *name,                       \
  88                 struct hostent *host,                   \
  89                 char *buffer, size_t buflen,            \
  90                 int *errnop, int *h_errnop) {           \
  91         enum nss_status ret = NSS_STATUS_NOTFOUND;      \
  92                                                         \
  93         if (_res.options & RES_USE_INET6)               \
  94                 ret = _nss_##module##_gethostbyname3_r( \
  95                         name,                           \
  96                         AF_INET6,                       \
  97                         host,                           \
  98                         buffer, buflen,                 \
  99                         errnop, h_errnop,               \
 100                         NULL,                           \
 101                         NULL);                          \
 102         if (ret == NSS_STATUS_NOTFOUND)                 \
 103                 ret = _nss_##module##_gethostbyname3_r( \
 104                         name,                           \
 105                         AF_INET,                        \
 106                         host,                           \
 107                         buffer, buflen,                 \
 108                         errnop, h_errnop,               \
 109                         NULL,                           \
 110                         NULL);                          \
 111        return ret;                                      \
 112 }
 113
 114 #define NSS_GETHOSTBYADDR_FALLBACKS(module)             \
 115 enum nss_status _nss_##module##_gethostbyaddr_r(        \
 116                 const void* addr, socklen_t len,        \
 117                 int af,                                 \
 118                 struct hostent *host,                   \
 119                 char *buffer, size_t buflen,            \
 120                 int *errnop, int *h_errnop) {           \
 121         return _nss_##module##_gethostbyaddr2_r(        \
 122                         addr, len,                      \
 123                         af,                             \
 124                         host,                           \
 125                         buffer, buflen,                 \
 126                         errnop, h_errnop,               \
 127                         NULL);                          \
 128 }