/* $NetBSD: compat_ns_addr.c,v 1.3 2012/10/15 22:22:01 msaitoh Exp $ */
/*
* Copyright (c) 1986, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* J.Q. Johnson.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)ns_addr.c 8.1 (Berkeley) 6/7/93";
#else
__RCSID("$NetBSD: compat_ns_addr.c,v 1.3 2012/10/15 22:22:01 msaitoh Exp $");
#endif
#endif /* LIBC_SCCS and not lint */
#include "namespace.h"
#include <sys/param.h>
#include <compat/include/ns.h>
#include <assert.h>
#include <stdio.h>
#include <string.h>
static void Field(char *, uint8_t *, int);
static void cvtbase(long, int, int[], int, uint8_t [], int);
struct ns_addr
ns_addr(const char *name)
{
char separator;
char *hostname, *socketname, *cp;
char buf[50];
static struct ns_addr addr;
_DIAGASSERT(name != NULL);
(void)strlcpy(buf, name, sizeof(buf));
/*
* First, figure out what he intends as a field separtor.
* Despite the way this routine is written, the prefered
* form 2-272.AA001234H.01777, i.e. XDE standard.
* Great efforts are made to insure backward compatibility.
*/
if ((hostname = strchr(buf, '#')) != NULL)
separator = '#';
else {
hostname = strchr(buf, '.');
if ((cp = strchr(buf, ':')) &&
((hostname && cp < hostname) || (hostname == 0))) {
hostname = cp;
separator = ':';
} else
separator = '.';
}
if (hostname)
*hostname++ = 0;
memset(&addr, '\0', sizeof(addr));
Field(buf, addr.x_net.c_net, 4);
if (hostname == 0)
return (addr); /* No separator means net only */
socketname = strchr(hostname, separator);
if (socketname) {
*socketname++ = 0;
Field(socketname, (uint8_t *)(void *)&addr.x_port, 2);
}
Field(hostname, addr.x_host.c_host, 6);
return (addr);
}
static void
Field(char *buf, uint8_t *out, int len)
{
register char *bp = buf;
int i, ibase, base16 = 0, base10 = 0;
unsigned int clen = 0;
int hb[6], *hp;
_DIAGASSERT(buf != NULL);
_DIAGASSERT(out != NULL);
/*
* first try 2-273#2-852-151-014#socket
*/
if ((*buf != '-') &&
(1 < (i = sscanf(buf, "%d-%d-%d-%d-%d",
&hb[0], &hb[1], &hb[2], &hb[3], &hb[4])))) {
cvtbase(1000L, 256, hb, i, out, len);
return;
}
/*
* try form 8E1#0.0.AA.0.5E.E6#socket
*/
if (1 < (i = sscanf(buf,"%x.%x.%x.%x.%x.%x",
&hb[0], &hb[1], &hb[2], &hb[3], &hb[4], &hb[5]))) {
cvtbase(256L, 256, hb, i, out, len);
return;
}
/*
* try form 8E1#0:0:AA:0:5E:E6#socket
*/
if (1 < (i = sscanf(buf,"%x:%x:%x:%x:%x:%x",
&hb[0], &hb[1], &hb[2], &hb[3], &hb[4], &hb[5]))) {
cvtbase(256L, 256, hb, i, out, len);
return;
}
/*
* This is REALLY stretching it but there was a
* comma notation separting shorts -- definitely non standard
*/
if (1 < (i = sscanf(buf,"%x,%x,%x",
&hb[0], &hb[1], &hb[2]))) {
hb[0] = htons(hb[0]); hb[1] = htons(hb[1]);
hb[2] = htons(hb[2]);
cvtbase(65536L, 256, hb, i, out, len);
return;
}
/* Need to decide if base 10, 16 or 8 */
while (*bp) switch (*bp++) {
case '0': case '1': case '2': case '3': case '4': case '5':
case '6': case '7': case '-':
break;
case '8': case '9':
base10 = 1;
break;
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
base16 = 1;
break;
case 'x': case 'X':
*--bp = '0';
base16 = 1;
break;
case 'h': case 'H':
base16 = 1;
/* FALLTHROUGH */
default:
*--bp = 0; /* Ends Loop */
}
if (base16) {
ibase = 4096;
} else if (base10 == 0 && *buf == '0') {
ibase = 512;
} else {
base10 = 1;
ibase = 1000;
}
for (bp = buf; *bp++; ) clen++;
if (clen == 0) clen++;
if (clen > 18) clen = 18;
i = ((clen - 1) / 3) + 1;
bp = clen + buf - 3;
hp = hb + i - 1;
while (hp > hb) {
if (base16)
(void)sscanf(bp, "%3x", hp);
else if (base10)
(void)sscanf(bp, "%3d", hp);
else
(void)sscanf(bp, "%3o", hp);
bp[0] = 0;
hp--;
bp -= 3;
}
if (base16)
(void)sscanf(buf, "%3x", hp);
else if (base10)
(void)sscanf(buf, "%3d", hp);
else
(void)sscanf(buf, "%3o", hp);
cvtbase((long)ibase, 256, hb, i, out, len);
}
static void
cvtbase(long oldbase, int newbase, int input[], int inlen,
uint8_t result[], int reslen)
{
int d, e;
long sum;
_DIAGASSERT(input != NULL);
_DIAGASSERT(result != NULL);
_DIAGASSERT(inlen > 0);
e = 1;
while (e > 0 && reslen > 0) {
d = 0; e = 0; sum = 0;
/* long division: input=input/newbase */
while (d < inlen) {
sum = sum*oldbase + (long) input[d];
e += (sum > 0);
input[d++] = (int) (sum / newbase);
sum %= newbase;
}
/* accumulate remainder */
result[--reslen] = (unsigned char)sum;
}
for (d=0; d < reslen; d++)
result[d] = 0;
}