246 lines
6.2 KiB
C
246 lines
6.2 KiB
C
/* $NetBSD: ns_addr.c,v 1.10 1999/09/20 04:39:15 lukem Exp $ */
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/*
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* Copyright (c) 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* J.Q. Johnson.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char sccsid[] = "@(#)ns_addr.c 8.1 (Berkeley) 6/7/93";
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#else
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__RCSID("$NetBSD: ns_addr.c,v 1.10 1999/09/20 04:39:15 lukem Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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#include <sys/param.h>
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#include <netns/ns.h>
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#include <assert.h>
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#include <stdio.h>
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#include <string.h>
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static struct ns_addr addr, zero_addr;
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static void Field __P((char *, u_int8_t *, int));
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static void cvtbase __P((long, int, int[], int, u_int8_t[], int));
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struct ns_addr
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ns_addr(name)
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const char *name;
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{
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char separator;
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char *hostname, *socketname, *cp;
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char buf[50];
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_DIAGASSERT(name != NULL);
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(void)strncpy(buf, name, sizeof(buf) - 1);
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buf[sizeof(buf) - 1] = '\0';
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/*
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* First, figure out what he intends as a field separtor.
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* Despite the way this routine is written, the prefered
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* form 2-272.AA001234H.01777, i.e. XDE standard.
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* Great efforts are made to insure backward compatability.
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*/
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if ((hostname = strchr(buf, '#')) != NULL)
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separator = '#';
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else {
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hostname = strchr(buf, '.');
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if ((cp = strchr(buf, ':')) &&
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((hostname && cp < hostname) || (hostname == 0))) {
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hostname = cp;
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separator = ':';
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} else
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separator = '.';
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}
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if (hostname)
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*hostname++ = 0;
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addr = zero_addr;
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Field(buf, addr.x_net.c_net, 4);
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if (hostname == 0)
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return (addr); /* No separator means net only */
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socketname = strchr(hostname, separator);
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if (socketname) {
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*socketname++ = 0;
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Field(socketname, (u_int8_t *)(void *)&addr.x_port, 2);
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}
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Field(hostname, addr.x_host.c_host, 6);
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return (addr);
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}
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static void
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Field(buf, out, len)
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char *buf;
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u_int8_t *out;
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int len;
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{
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register char *bp = buf;
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int i, ibase, base16 = 0, base10 = 0, clen = 0;
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int hb[6], *hp;
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char *fmt;
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_DIAGASSERT(buf != NULL);
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_DIAGASSERT(out != NULL);
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/*
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* first try 2-273#2-852-151-014#socket
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*/
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if ((*buf != '-') &&
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(1 < (i = sscanf(buf, "%d-%d-%d-%d-%d",
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&hb[0], &hb[1], &hb[2], &hb[3], &hb[4])))) {
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cvtbase(1000L, 256, hb, i, out, len);
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return;
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}
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/*
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* try form 8E1#0.0.AA.0.5E.E6#socket
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*/
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if (1 < (i = sscanf(buf,"%x.%x.%x.%x.%x.%x",
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&hb[0], &hb[1], &hb[2], &hb[3], &hb[4], &hb[5]))) {
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cvtbase(256L, 256, hb, i, out, len);
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return;
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}
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/*
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* try form 8E1#0:0:AA:0:5E:E6#socket
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*/
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if (1 < (i = sscanf(buf,"%x:%x:%x:%x:%x:%x",
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&hb[0], &hb[1], &hb[2], &hb[3], &hb[4], &hb[5]))) {
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cvtbase(256L, 256, hb, i, out, len);
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return;
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}
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/*
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* This is REALLY stretching it but there was a
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* comma notation separting shorts -- definitely non standard
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*/
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if (1 < (i = sscanf(buf,"%x,%x,%x",
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&hb[0], &hb[1], &hb[2]))) {
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hb[0] = htons(hb[0]); hb[1] = htons(hb[1]);
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hb[2] = htons(hb[2]);
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cvtbase(65536L, 256, hb, i, out, len);
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return;
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}
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/* Need to decide if base 10, 16 or 8 */
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while (*bp) switch (*bp++) {
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case '0': case '1': case '2': case '3': case '4': case '5':
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case '6': case '7': case '-':
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break;
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case '8': case '9':
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base10 = 1;
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break;
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case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
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case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
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base16 = 1;
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break;
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case 'x': case 'X':
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*--bp = '0';
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base16 = 1;
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break;
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case 'h': case 'H':
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base16 = 1;
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/* FALLTHROUGH */
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default:
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*--bp = 0; /* Ends Loop */
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}
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if (base16) {
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fmt = "%3x";
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ibase = 4096;
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} else if (base10 == 0 && *buf == '0') {
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fmt = "%3o";
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ibase = 512;
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} else {
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fmt = "%3d";
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ibase = 1000;
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}
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for (bp = buf; *bp++; ) clen++;
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if (clen == 0) clen++;
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if (clen > 18) clen = 18;
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i = ((clen - 1) / 3) + 1;
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bp = clen + buf - 3;
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hp = hb + i - 1;
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while (hp > hb) {
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(void)sscanf(bp, fmt, hp);
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bp[0] = 0;
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hp--;
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bp -= 3;
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}
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(void)sscanf(buf, fmt, hp);
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cvtbase((long)ibase, 256, hb, i, out, len);
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}
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static void
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cvtbase(oldbase,newbase,input,inlen,result,reslen)
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long oldbase;
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int newbase;
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int input[];
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int inlen;
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unsigned char result[];
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int reslen;
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{
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int d, e;
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long sum;
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_DIAGASSERT(input != NULL);
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_DIAGASSERT(result != NULL);
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e = 1;
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while (e > 0 && reslen > 0) {
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d = 0; e = 0; sum = 0;
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/* long division: input=input/newbase */
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while (d < inlen) {
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sum = sum*oldbase + (long) input[d];
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e += (sum > 0);
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input[d++] = (int) (sum / newbase);
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sum %= newbase;
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}
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/* accumulate remainder */
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result[--reslen] = (unsigned char)sum;
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}
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for (d=0; d < reslen; d++)
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result[d] = 0;
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}
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