mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-08 14:20:07 +00:00
13e1f86706
And reformat to GNU style. The symbol was moved using scripts/move-symbol-to-libc.py. Reviewed-by: Carlos O'Donell <carlos@redhat.com> Tested-by: Carlos O'Donell <carlos@redhat.com>
122 lines
2.6 KiB
C
122 lines
2.6 KiB
C
/*
|
|
* 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 <sys/types.h>
|
|
|
|
#include <netinet/in.h>
|
|
#include <arpa/nameser.h>
|
|
|
|
#include <errno.h>
|
|
#include <resolv.h>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
#include <stdlib.h>
|
|
#include <limits.h>
|
|
|
|
# define SPRINTF(x) ((size_t)sprintf x)
|
|
|
|
/* Forward. */
|
|
|
|
static int labellen(const u_char *);
|
|
|
|
/* Public. */
|
|
|
|
/*%
|
|
* Convert a network strings labels into all lowercase.
|
|
*
|
|
* return:
|
|
*\li Number of bytes written to buffer, or -1 (with errno set)
|
|
*
|
|
* notes:
|
|
*\li Enforces label and domain length limits.
|
|
*/
|
|
|
|
int
|
|
ns_name_ntol(const u_char *src, u_char *dst, size_t dstsiz)
|
|
{
|
|
const u_char *cp;
|
|
u_char *dn, *eom;
|
|
u_char c;
|
|
u_int n;
|
|
int l;
|
|
|
|
cp = src;
|
|
dn = dst;
|
|
eom = dst + dstsiz;
|
|
|
|
if (dn >= eom) {
|
|
__set_errno (EMSGSIZE);
|
|
return (-1);
|
|
}
|
|
while ((n = *cp++) != 0) {
|
|
if ((n & NS_CMPRSFLGS) == NS_CMPRSFLGS) {
|
|
/* Some kind of compression pointer. */
|
|
__set_errno (EMSGSIZE);
|
|
return (-1);
|
|
}
|
|
*dn++ = n;
|
|
if ((l = labellen(cp - 1)) < 0) {
|
|
__set_errno (EMSGSIZE);
|
|
return (-1);
|
|
}
|
|
if (dn + l >= eom) {
|
|
__set_errno (EMSGSIZE);
|
|
return (-1);
|
|
}
|
|
for ((void)NULL; l > 0; l--) {
|
|
c = *cp++;
|
|
if (isupper(c))
|
|
*dn++ = tolower(c);
|
|
else
|
|
*dn++ = c;
|
|
}
|
|
}
|
|
*dn++ = '\0';
|
|
return (dn - dst);
|
|
}
|
|
|
|
/*%
|
|
* Reset dnptrs so that there are no active references to pointers at or
|
|
* after src.
|
|
*/
|
|
void
|
|
ns_name_rollback(const u_char *src, const u_char **dnptrs,
|
|
const u_char **lastdnptr)
|
|
{
|
|
while (dnptrs < lastdnptr && *dnptrs != NULL) {
|
|
if (*dnptrs >= src) {
|
|
*dnptrs = NULL;
|
|
break;
|
|
}
|
|
dnptrs++;
|
|
}
|
|
}
|
|
|
|
/* Private. */
|
|
|
|
/* Return the length of the encoded label starting at LP, or -1 for
|
|
compression references and extended label types. */
|
|
static int
|
|
labellen (const unsigned char *lp)
|
|
{
|
|
if (*lp <= 63)
|
|
return *lp;
|
|
return -1;
|
|
}
|
|
|
|
/*! \file */
|