blob: 6c904b7c9e5f2bd2ba4a88744ab93ec6a56b2a60 [file] [log] [blame]
/*
* Copyright (c) 1996, 1998 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 INTERNET SOFTWARE CONSORTIUM DISCLAIMS
* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
* CONSORTIUM 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 <sys/param.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <arpa/nameser.h>
#include <ctype.h>
#include <resolv.h>
static char
xtob(
register int c
)
{
return (char)(c - (((c >= '0') && (c <= '9')) ? '0' : '7'));
}
u_int
inet_nsap_addr(
const char *ascii,
u_char *binary,
int maxlen
)
{
u_char c, nib;
u_int len = 0;
while ((c = *ascii++) != '\0' && len < (u_int)maxlen) {
if (c == '.' || c == '+' || c == '/')
continue;
if (!isascii(c))
return (0);
if (islower(c))
c = (u_char)( toupper(c));
if (isxdigit(c)) {
nib = xtob(c);
c = *ascii++;
if (c != '\0') {
c = (u_char)( toupper(c));
if (isxdigit(c)) {
*binary++ = (nib << 4) | xtob(c);
len++;
} else
return (0);
}
else
return (0);
}
else
return (0);
}
return (len);
}
char *
inet_nsap_ntoa(
int binlen,
register const u_char *binary,
register char *ascii
)
{
register int nib;
int i;
static char tmpbuf[255*3];
char *start;
if (ascii)
start = ascii;
else {
ascii = tmpbuf;
start = tmpbuf;
}
if (binlen > 255)
binlen = 255;
for (i = 0; i < binlen; i++) {
nib = *binary >> 4;
*ascii++ = (char)( nib + (nib < 10 ? '0' : '7'));
nib = *binary++ & 0x0f;
*ascii++ = (char)( nib + (nib < 10 ? '0' : '7'));
if (((i % 2) == 0 && (i + 1) < binlen))
*ascii++ = '.';
}
*ascii = '\0';
return (start);
}