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17d0407a | 1 | /* Legacy function for expected server checking. |
6d7e8eda | 2 | Copyright (C) 2016-2023 Free Software Foundation, Inc. |
17d0407a FW |
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 | /* | |
20 | * Copyright (c) 1985, 1989, 1993 | |
21 | * The Regents of the University of California. All rights reserved. | |
22 | * | |
23 | * Redistribution and use in source and binary forms, with or without | |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
26 | * 1. Redistributions of source code must retain the above copyright | |
27 | * notice, this list of conditions and the following disclaimer. | |
28 | * 2. Redistributions in binary form must reproduce the above copyright | |
29 | * notice, this list of conditions and the following disclaimer in the | |
30 | * documentation and/or other materials provided with the distribution. | |
31 | * 4. Neither the name of the University nor the names of its contributors | |
32 | * may be used to endorse or promote products derived from this software | |
33 | * without specific prior written permission. | |
34 | * | |
35 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
36 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
37 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
38 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
39 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
40 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
41 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
42 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
43 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
44 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
45 | * SUCH DAMAGE. | |
46 | */ | |
47 | ||
48 | /* | |
49 | * Portions Copyright (c) 1993 by Digital Equipment Corporation. | |
50 | * | |
51 | * Permission to use, copy, modify, and distribute this software for any | |
52 | * purpose with or without fee is hereby granted, provided that the above | |
53 | * copyright notice and this permission notice appear in all copies, and that | |
54 | * the name of Digital Equipment Corporation not be used in advertising or | |
55 | * publicity pertaining to distribution of the document or software without | |
56 | * specific, written prior permission. | |
57 | * | |
58 | * THE SOFTWARE IS PROVIDED "AS IS" AND DIGITAL EQUIPMENT CORP. DISCLAIMS ALL | |
59 | * WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES | |
60 | * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL DIGITAL EQUIPMENT | |
61 | * CORPORATION BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL | |
62 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR | |
63 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS | |
64 | * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS | |
65 | * SOFTWARE. | |
66 | */ | |
67 | ||
68 | /* | |
69 | * Portions Copyright (c) 1996-1999 by Internet Software Consortium. | |
70 | * | |
71 | * Permission to use, copy, modify, and distribute this software for any | |
72 | * purpose with or without fee is hereby granted, provided that the above | |
73 | * copyright notice and this permission notice appear in all copies. | |
74 | * | |
75 | * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS | |
76 | * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES | |
77 | * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE | |
78 | * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL | |
79 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR | |
80 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS | |
81 | * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS | |
82 | * SOFTWARE. | |
83 | */ | |
84 | ||
85 | #include <resolv-internal.h> | |
86 | #include <resolv.h> | |
87 | #include <string.h> | |
88 | ||
89 | /* author: paul vixie, 29may94 */ | |
90 | static int | |
91 | res_ourserver_p (const res_state statp, const struct sockaddr_in6 *inp) | |
92 | { | |
93 | int ns; | |
94 | ||
95 | if (inp->sin6_family == AF_INET) | |
96 | { | |
97 | struct sockaddr_in *in4p = (struct sockaddr_in *) inp; | |
98 | in_port_t port = in4p->sin_port; | |
99 | in_addr_t addr = in4p->sin_addr.s_addr; | |
100 | ||
101 | for (ns = 0; ns < statp->nscount; ns++) | |
102 | { | |
103 | const struct sockaddr_in *srv = | |
104 | (struct sockaddr_in *) __res_get_nsaddr (statp, ns); | |
105 | ||
106 | if ((srv->sin_family == AF_INET) && | |
107 | (srv->sin_port == port) && | |
108 | (srv->sin_addr.s_addr == INADDR_ANY || | |
109 | srv->sin_addr.s_addr == addr)) | |
110 | return 1; | |
111 | } | |
112 | } else if (inp->sin6_family == AF_INET6) | |
113 | { | |
114 | for (ns = 0; ns < statp->nscount; ns++) | |
115 | { | |
116 | const struct sockaddr_in6 *srv | |
117 | = (struct sockaddr_in6 *) __res_get_nsaddr (statp, ns); | |
118 | if ((srv->sin6_family == AF_INET6) && | |
119 | (srv->sin6_port == inp->sin6_port) && | |
120 | !(memcmp (&srv->sin6_addr, &in6addr_any, | |
121 | sizeof (struct in6_addr)) && | |
122 | memcmp (&srv->sin6_addr, &inp->sin6_addr, | |
123 | sizeof (struct in6_addr)))) | |
124 | return 1; | |
125 | } | |
126 | } | |
127 | return 0; | |
128 | } | |
129 | ||
130 | int | |
131 | res_isourserver (const struct sockaddr_in *inp) | |
132 | { | |
133 | return res_ourserver_p (&_res, (const struct sockaddr_in6 *) inp); | |
134 | } |