mirror of git://sourceware.org/git/glibc.git
51 lines
2.2 KiB
C
51 lines
2.2 KiB
C
/* Compress a DNS domain name in presentation format.
|
|
* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
|
|
* Copyright (c) 1996,1999 by Internet Software Consortium.
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
|
|
* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*/
|
|
|
|
#include <arpa/nameser.h>
|
|
#include <shlib-compat.h>
|
|
|
|
/* Compresses a domain name into wire format, using compression pointers.
|
|
Returns the number of bytes consumed in DST or -1 (with errno set).
|
|
|
|
DNPTRS is an array of pointers to previous compressed names.
|
|
DNPTRS[0] is a pointer to the beginning of the message.
|
|
|
|
The list ends with NULL. LASTDNPTR is a pointer to the end of the
|
|
array pointed to by DNPTRS. Side effect is to update the list of
|
|
pointers for labels inserted into the message as we compress the
|
|
name. If DNPTRS is NULL, we don't try to compress names. If
|
|
LASTDNPTR * is NULL, we don't update the list. */
|
|
int
|
|
___ns_name_compress (const char *src, unsigned char *dst, size_t dstsiz,
|
|
const unsigned char **dnptrs,
|
|
const unsigned char **lastdnptr)
|
|
{
|
|
unsigned char tmp[NS_MAXCDNAME];
|
|
|
|
if (__ns_name_pton (src, tmp, sizeof tmp) < 0)
|
|
return -1;
|
|
return __ns_name_pack (tmp, dst, dstsiz, dnptrs, lastdnptr);
|
|
}
|
|
versioned_symbol (libc, ___ns_name_compress, ns_name_compress, GLIBC_2_34);
|
|
versioned_symbol (libc, ___ns_name_compress, __ns_name_compress,
|
|
GLIBC_PRIVATE);
|
|
libc_hidden_ver (___ns_name_compress, __ns_name_compress)
|
|
|
|
#if OTHER_SHLIB_COMPAT (libresolv, GLIBC_2_9, GLIBC_2_34)
|
|
compat_symbol (libresolv, ___ns_name_compress, ns_name_compress, GLIBC_2_9);
|
|
#endif
|