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39 lines
1.4 KiB
C
39 lines
1.4 KiB
C
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/* Check if two domain names are equal after trailing dot normalization.
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* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
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* Copyright (c) 1995,1999 by Internet Software Consortium.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
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* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
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* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*/
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#include <arpa/nameser.h>
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#include <string.h>
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/* Determines whether domain name A is the same as domain name B.
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Returns -1 on error, 0 if names differ, 1 if names are the
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same. */
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int
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__libc_ns_samename (const char *a, const char *b)
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{
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char ta[NS_MAXDNAME], tb[NS_MAXDNAME];
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if (__libc_ns_makecanon (a, ta, sizeof ta) < 0 ||
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__libc_ns_makecanon (b, tb, sizeof tb) < 0)
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return -1;
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if (__strcasecmp (ta, tb) == 0)
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return 1;
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else
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return 0;
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}
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libc_hidden_def (__libc_ns_samename)
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