lib/libc/compat/net/compat_ns_addr.c

   1 /*      $NetBSD: ns_addr.c,v 1.17 2004/05/09 11:25:20 kleink Exp $      */
   2
   3 /*
   4  * Copyright (c) 1986, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * J.Q. Johnson.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. Neither the name of the University nor the names of its contributors
  19  *    may be used to endorse or promote products derived from this software
  20  *    without specific prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  32  * SUCH DAMAGE.
  33  */
  34
  35 #include <sys/cdefs.h>
  36 #if defined(LIBC_SCCS) && !defined(lint)
  37 #if 0
  38 static char sccsid[] = "@(#)ns_addr.c   8.1 (Berkeley) 6/7/93";
  39 #else
  40 __RCSID("$NetBSD: ns_addr.c,v 1.17 2004/05/09 11:25:20 kleink Exp $");
  41 #endif
  42 #endif /* LIBC_SCCS and not lint */
  43
  44 #include "namespace.h"
  45 #include <sys/param.h>
  46 #include <compat/include/ns.h>
  47
  48 #include <assert.h>
  49 #include <stdio.h>
  50 #include <string.h>
  51
  52 static void Field __P((char *, u_int8_t *, int));
  53 static void cvtbase __P((long, int, int[], int, u_int8_t[], int));
  54
  55 struct ns_addr
  56 ns_addr(name)
  57         const char *name;
  58 {
  59         char separator;
  60         char *hostname, *socketname, *cp;
  61         char buf[50];
  62         static struct ns_addr addr;
  63
  64         _DIAGASSERT(name != NULL);
  65
  66         (void)strlcpy(buf, name, sizeof(buf));
  67
  68         /*
  69          * First, figure out what he intends as a field separtor.
  70          * Despite the way this routine is written, the prefered
  71          * form  2-272.AA001234H.01777, i.e. XDE standard.
  72          * Great efforts are made to insure backward compatibility.
  73          */
  74         if ((hostname = strchr(buf, '#')) != NULL)
  75                 separator = '#';
  76         else {
  77                 hostname = strchr(buf, '.');
  78                 if ((cp = strchr(buf, ':')) &&
  79                     ((hostname && cp < hostname) || (hostname == 0))) {
  80                         hostname = cp;
  81                         separator = ':';
  82                 } else
  83                         separator = '.';
  84         }
  85         if (hostname)
  86                 *hostname++ = 0;
  87
  88         memset(&addr, '\0', sizeof(addr));
  89         Field(buf, addr.x_net.c_net, 4);
  90         if (hostname == 0)
  91                 return (addr);  /* No separator means net only */
  92
  93         socketname = strchr(hostname, separator);
  94         if (socketname) {
  95                 *socketname++ = 0;
  96                 Field(socketname, (u_int8_t *)(void *)&addr.x_port, 2);
  97         }
  98
  99         Field(hostname, addr.x_host.c_host, 6);
 100
 101         return (addr);
 102 }
 103
 104 static void
 105 Field(buf, out, len)
 106         char *buf;
 107         u_int8_t *out;
 108         int len;
 109 {
 110         register char *bp = buf;
 111         int i, ibase, base16 = 0, base10 = 0, clen = 0;
 112         int hb[6], *hp;
 113
 114         _DIAGASSERT(buf != NULL);
 115         _DIAGASSERT(out != NULL);
 116
 117         /*
 118          * first try 2-273#2-852-151-014#socket
 119          */
 120         if ((*buf != '-') &&
 121             (1 < (i = sscanf(buf, "%d-%d-%d-%d-%d",
 122                         &hb[0], &hb[1], &hb[2], &hb[3], &hb[4])))) {
 123                 cvtbase(1000L, 256, hb, i, out, len);
 124                 return;
 125         }
 126         /*
 127          * try form 8E1#0.0.AA.0.5E.E6#socket
 128          */
 129         if (1 < (i = sscanf(buf,"%x.%x.%x.%x.%x.%x",
 130                         &hb[0], &hb[1], &hb[2], &hb[3], &hb[4], &hb[5]))) {
 131                 cvtbase(256L, 256, hb, i, out, len);
 132                 return;
 133         }
 134         /*
 135          * try form 8E1#0:0:AA:0:5E:E6#socket
 136          */
 137         if (1 < (i = sscanf(buf,"%x:%x:%x:%x:%x:%x",
 138                         &hb[0], &hb[1], &hb[2], &hb[3], &hb[4], &hb[5]))) {
 139                 cvtbase(256L, 256, hb, i, out, len);
 140                 return;
 141         }
 142         /*
 143          * This is REALLY stretching it but there was a
 144          * comma notation separting shorts -- definitely non standard
 145          */
 146         if (1 < (i = sscanf(buf,"%x,%x,%x",
 147                         &hb[0], &hb[1], &hb[2]))) {
 148                 hb[0] = htons(hb[0]); hb[1] = htons(hb[1]);
 149                 hb[2] = htons(hb[2]);
 150                 cvtbase(65536L, 256, hb, i, out, len);
 151                 return;
 152         }
 153
 154         /* Need to decide if base 10, 16 or 8 */
 155         while (*bp) switch (*bp++) {
 156
 157         case '0': case '1': case '2': case '3': case '4': case '5':
 158         case '6': case '7': case '-':
 159                 break;
 160
 161         case '8': case '9':
 162                 base10 = 1;
 163                 break;
 164
 165         case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
 166         case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
 167                 base16 = 1;
 168                 break;
 169
 170         case 'x': case 'X':
 171                 *--bp = '0';
 172                 base16 = 1;
 173                 break;
 174
 175         case 'h': case 'H':
 176                 base16 = 1;
 177                 /* FALLTHROUGH */
 178
 179         default:
 180                 *--bp = 0; /* Ends Loop */
 181         }
 182         if (base16) {
 183                 ibase = 4096;
 184         } else if (base10 == 0 && *buf == '0') {
 185                 ibase = 512;
 186         } else {
 187                 base10 = 1;
 188                 ibase = 1000;
 189         }
 190
 191         for (bp = buf; *bp++; ) clen++;
 192         if (clen == 0) clen++;
 193         if (clen > 18) clen = 18;
 194         i = ((clen - 1) / 3) + 1;
 195         bp = clen + buf - 3;
 196         hp = hb + i - 1;
 197
 198         while (hp > hb) {
 199                 if (base16)
 200                         (void)sscanf(bp, "%3x", hp);
 201                 else if (base10)
 202                         (void)sscanf(bp, "%3d", hp);
 203                 else
 204                         (void)sscanf(bp, "%3o", hp);
 205
 206                 bp[0] = 0;
 207                 hp--;
 208                 bp -= 3;
 209         }
 210         if (base16)
 211                 (void)sscanf(buf, "%3x", hp);
 212         else if (base10)
 213                 (void)sscanf(buf, "%3d", hp);
 214         else
 215                 (void)sscanf(buf, "%3o", hp);
 216
 217         cvtbase((long)ibase, 256, hb, i, out, len);
 218 }
 219
 220 static void
 221 cvtbase(oldbase,newbase,input,inlen,result,reslen)
 222         long oldbase;
 223         int newbase;
 224         int input[];
 225         int inlen;
 226         unsigned char result[];
 227         int reslen;
 228 {
 229         int d, e;
 230         long sum;
 231
 232         _DIAGASSERT(input != NULL);
 233         _DIAGASSERT(result != NULL);
 234
 235         e = 1;
 236         while (e > 0 && reslen > 0) {
 237                 d = 0; e = 0; sum = 0;
 238                 /* long division: input=input/newbase */
 239                 while (d < inlen) {
 240                         sum = sum*oldbase + (long) input[d];
 241                         e += (sum > 0);
 242                         input[d++] = (int) (sum / newbase);
 243                         sum %= newbase;
 244                 }
 245                 /* accumulate remainder */
 246                 result[--reslen] = (unsigned char)sum;
 247         }
 248         for (d=0; d < reslen; d++)
 249                 result[d] = 0;
 250 }