1 | /* Check if two domain names are equal after trailing dot normalization. |
2 | * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC") |
3 | * Copyright (c) 1995,1999 by Internet Software Consortium. |
4 | * |
5 | * Permission to use, copy, modify, and distribute this software for any |
6 | * purpose with or without fee is hereby granted, provided that the above |
7 | * copyright notice and this permission notice appear in all copies. |
8 | * |
9 | * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS |
10 | * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES |
11 | * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE |
12 | * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL |
13 | * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
14 | * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS |
15 | * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS |
16 | * SOFTWARE. |
17 | */ |
18 | |
19 | #include <arpa/nameser.h> |
20 | #include <string.h> |
21 | |
22 | /* Determines whether domain name A is the same as domain name B. |
23 | Returns -1 on error, 0 if names differ, 1 if names are the |
24 | same. */ |
25 | int |
26 | __libc_ns_samename (const char *a, const char *b) |
27 | { |
28 | char ta[NS_MAXDNAME], tb[NS_MAXDNAME]; |
29 | |
30 | if (__libc_ns_makecanon (a, ta, sizeof ta) < 0 || |
31 | __libc_ns_makecanon (b, tb, sizeof tb) < 0) |
32 | return -1; |
33 | if (__strcasecmp (ta, tb) == 0) |
34 | return 1; |
35 | else |
36 | return 0; |
37 | } |
38 | libc_hidden_def (__libc_ns_samename) |
39 | |