1/* Expand compressed domain name to presentation format.
2 * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
3 * Copyright (c) 1996,1999 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 ISC DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
15 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17
18#include <arpa/nameser.h>
19#include <shlib-compat.h>
20
21/* Expand compressed domain name to presentation format. Returns the
22 number of bytes read out of `src', or -1 (with errno set). The
23 root domain is returned as ".", not "". */
24int
25___ns_name_uncompress (const unsigned char *msg, const unsigned char *eom,
26 const unsigned char *src, char *dst, size_t dstsiz)
27{
28 unsigned char tmp[NS_MAXCDNAME];
29 int n = __ns_name_unpack (msg, eom, src, tmp, sizeof tmp);
30 if (n < 0)
31 return -1;
32 if (__ns_name_ntop (tmp, dst, dstsiz) < 0)
33 return -1;
34 return n;
35}
36versioned_symbol (libc, ___ns_name_uncompress, ns_name_uncompress,
37 GLIBC_2_34);
38versioned_symbol (libc, ___ns_name_uncompress, __ns_name_uncompress,
39 GLIBC_PRIVATE);
40libc_hidden_ver (___ns_name_uncompress, __ns_name_uncompress)
41
42#if OTHER_SHLIB_COMPAT (libresolv, GLIBC_2_9, GLIBC_2_34)
43compat_symbol (libresolv, ___ns_name_uncompress, ns_name_uncompress,
44 GLIBC_2_9);
45#endif
46