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Commit | Line | Data |
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762a2b2d FW |
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) |