src/shared/nss-util.h


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128

/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/

#pragma once

/***
  This file is part of systemd.

  Copyright 2014 Lennart Poettering

  systemd is free software; you can redistribute it and/or modify it
  under the terms of the GNU Lesser General Public License as published by
  the Free Software Foundation; either version 2.1 of the License, or
  (at your option) any later version.

  systemd is distributed in the hope that it will be useful, but
  WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public License
  along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/

#include <nss.h>
#include <netdb.h>
#include <resolv.h>

#define NSS_GETHOSTBYNAME_PROTOTYPES(module)            \
enum nss_status _nss_##module##_gethostbyname4_r(       \
                const char *name,                       \
                struct gaih_addrtuple **pat,            \
                char *buffer, size_t buflen,            \
                int *errnop, int *h_errnop,             \
                int32_t *ttlp) _public_;                \
enum nss_status _nss_##module##_gethostbyname3_r(       \
                const char *name,                       \
                int af,                                 \
                struct hostent *host,                   \
                char *buffer, size_t buflen,            \
                int *errnop, int *h_errnop,             \
                int32_t *ttlp,                          \
                char **canonp) _public_;                \
enum nss_status _nss_##module##_gethostbyname2_r(       \
                const char *name,                       \
                int af,                                 \
                struct hostent *host,                   \
                char *buffer, size_t buflen,            \
                int *errnop, int *h_errnop) _public_;   \
enum nss_status _nss_##module##_gethostbyname_r(        \
                const char *name,                       \
                struct hostent *host,                   \
                char *buffer, size_t buflen,            \
                int *errnop, int *h_errnop) _public_

#define NSS_GETHOSTBYADDR_PROTOTYPES(module)            \
enum nss_status _nss_##module##_gethostbyaddr2_r(       \
                const void* addr, socklen_t len,        \
                int af,                                 \
                struct hostent *host,                   \
                char *buffer, size_t buflen,            \
                int *errnop, int *h_errnop,             \
                int32_t *ttlp) _public_;                \
enum nss_status _nss_##module##_gethostbyaddr_r(        \
                const void* addr, socklen_t len,        \
                int af,                                 \
                struct hostent *host,                   \
                char *buffer, size_t buflen,            \
                int *errnop, int *h_errnop) _public_

#define NSS_GETHOSTBYNAME_FALLBACKS(module)             \
enum nss_status _nss_##module##_gethostbyname2_r(       \
                const char *name,                       \
                int af,                                 \
                struct hostent *host,                   \
                char *buffer, size_t buflen,            \
                int *errnop, int *h_errnop) {           \
        return _nss_##module##_gethostbyname3_r(        \
                        name,                           \
                        af,                             \
                        host,                           \
                        buffer, buflen,                 \
                        errnop, h_errnop,               \
                        NULL,                           \
                        NULL);                          \
}                                                       \
enum nss_status _nss_##module##_gethostbyname_r(        \
                const char *name,                       \
                struct hostent *host,                   \
                char *buffer, size_t buflen,            \
                int *errnop, int *h_errnop) {           \
        enum nss_status ret = NSS_STATUS_NOTFOUND;      \
                                                        \
        if (_res.options & RES_USE_INET6)               \
                ret = _nss_##module##_gethostbyname3_r( \
                        name,                           \
                        AF_INET6,                       \
                        host,                           \
                        buffer, buflen,                 \
                        errnop, h_errnop,               \
                        NULL,                           \
                        NULL);                          \
        if (ret == NSS_STATUS_NOTFOUND)                 \
                ret = _nss_##module##_gethostbyname3_r( \
                        name,                           \
                        AF_INET,                        \
                        host,                           \
                        buffer, buflen,                 \
                        errnop, h_errnop,               \
                        NULL,                           \
                        NULL);                          \
       return ret;                                      \
}

#define NSS_GETHOSTBYADDR_FALLBACKS(module)             \
enum nss_status _nss_##module##_gethostbyaddr_r(        \
                const void* addr, socklen_t len,        \
                int af,                                 \
                struct hostent *host,                   \
                char *buffer, size_t buflen,            \
                int *errnop, int *h_errnop) {           \
        return _nss_##module##_gethostbyaddr2_r(        \
                        addr, len,                      \
                        af,                             \
                        host,                           \
                        buffer, buflen,                 \
                        errnop, h_errnop,               \
                        NULL);                          \
}