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51 lines
2.2 KiB
C
51 lines
2.2 KiB
C
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/* Compress a DNS domain name in presentation format.
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* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
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* Copyright (c) 1996,1999 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 ISC DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
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* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <arpa/nameser.h>
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#include <shlib-compat.h>
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/* Compresses a domain name into wire format, using compression pointers.
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Returns the number of bytes consumed in DST or -1 (with errno set).
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DNPTRS is an array of pointers to previous compressed names.
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DNPTRS[0] is a pointer to the beginning of the message.
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The list ends with NULL. LASTDNPTR is a pointer to the end of the
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array pointed to by DNPTRS. Side effect is to update the list of
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pointers for labels inserted into the message as we compress the
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name. If DNPTRS is NULL, we don't try to compress names. If
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LASTDNPTR * is NULL, we don't update the list. */
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int
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___ns_name_compress (const char *src, unsigned char *dst, size_t dstsiz,
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const unsigned char **dnptrs,
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const unsigned char **lastdnptr)
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{
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unsigned char tmp[NS_MAXCDNAME];
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if (__ns_name_pton (src, tmp, sizeof tmp) < 0)
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return -1;
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return __ns_name_pack (tmp, dst, dstsiz, dnptrs, lastdnptr);
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}
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versioned_symbol (libc, ___ns_name_compress, ns_name_compress, GLIBC_2_34);
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versioned_symbol (libc, ___ns_name_compress, __ns_name_compress,
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GLIBC_PRIVATE);
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libc_hidden_ver (___ns_name_compress, __ns_name_compress)
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#if OTHER_SHLIB_COMPAT (libresolv, GLIBC_2_9, GLIBC_2_34)
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compat_symbol (libresolv, ___ns_name_compress, ns_name_compress, GLIBC_2_9);
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#endif
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