lib/libipx/ipx_addr.c

   1 /*
   2  * Copyright (c) 1986, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * J.Q. Johnson.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  * $FreeBSD: src/lib/libipx/ipx_addr.c,v 1.2.8.1 2001/03/05 06:21:40 kris Exp $
  37  * $DragonFly: src/lib/libipx/ipx_addr.c,v 1.4 2005/08/04 19:27:09 drhodus Exp $
  38  *
  39  * @(#)ipx_addr.c
  40  */
  41
  42 #include <sys/param.h>
  43 #include <netipx/ipx.h>
  44 #include <stdio.h>
  45 #include <string.h>
  46
  47 static struct ipx_addr addr, zero_addr;
  48
  49 static void Field(), cvtbase();
  50
  51 struct ipx_addr
  52 ipx_addr(const char *name)
  53 {
  54         char separator;
  55         char *hostname, *socketname, *cp;
  56         char buf[50];
  57
  58         (void)strncpy(buf, name, sizeof(buf) - 1);
  59         buf[sizeof(buf) - 1] = '\0';
  60
  61         /*
  62          * First, figure out what he intends as a field separator.
  63          * Despite the way this routine is written, the preferred
  64          * form  2-272.AA001234H.01777, i.e. XDE standard.
  65          * Great efforts are made to ensure backwards compatibility.
  66          */
  67         if ( (hostname = strchr(buf, '#')) )
  68                 separator = '#';
  69         else {
  70                 hostname = strchr(buf, '.');
  71                 if ((cp = strchr(buf, ':')) &&
  72                     ((hostname && cp < hostname) || (hostname == 0))) {
  73                         hostname = cp;
  74                         separator = ':';
  75                 } else
  76                         separator = '.';
  77         }
  78         if (hostname)
  79                 *hostname++ = 0;
  80
  81         addr = zero_addr;
  82         Field(buf, addr.x_net.c_net, 4);
  83         if (hostname == 0)
  84                 return (addr);  /* No separator means net only */
  85
  86         socketname = strchr(hostname, separator);
  87         if (socketname) {
  88                 *socketname++ = 0;
  89                 Field(socketname, (u_char *)&addr.x_port, 2);
  90         }
  91
  92         Field(hostname, addr.x_host.c_host, 6);
  93
  94         return (addr);
  95 }
  96
  97 static void
  98 Field(char *buf, u_char *out, int len)
  99 {
 100         char *bp = buf;
 101         int i, ibase, base16 = 0, base10 = 0, clen = 0;
 102         int hb[6], *hp;
 103         char *fmt;
 104
 105         /*
 106          * first try 2-273#2-852-151-014#socket
 107          */
 108         if ((*buf != '-') &&
 109             (1 < (i = sscanf(buf, "%d-%d-%d-%d-%d",
 110                         &hb[0], &hb[1], &hb[2], &hb[3], &hb[4])))) {
 111                 cvtbase(1000L, 256, hb, i, out, len);
 112                 return;
 113         }
 114         /*
 115          * try form 8E1#0.0.AA.0.5E.E6#socket
 116          */
 117         if (1 < (i = sscanf(buf,"%x.%x.%x.%x.%x.%x",
 118                         &hb[0], &hb[1], &hb[2], &hb[3], &hb[4], &hb[5]))) {
 119                 cvtbase(256L, 256, hb, i, out, len);
 120                 return;
 121         }
 122         /*
 123          * try form 8E1#0:0:AA:0:5E:E6#socket
 124          */
 125         if (1 < (i = sscanf(buf,"%x:%x:%x:%x:%x:%x",
 126                         &hb[0], &hb[1], &hb[2], &hb[3], &hb[4], &hb[5]))) {
 127                 cvtbase(256L, 256, hb, i, out, len);
 128                 return;
 129         }
 130         /*
 131          * This is REALLY stretching it but there was a
 132          * comma notation separating shorts -- definitely non-standard
 133          */
 134         if (1 < (i = sscanf(buf,"%x,%x,%x",
 135                         &hb[0], &hb[1], &hb[2]))) {
 136                 hb[0] = htons(hb[0]); hb[1] = htons(hb[1]);
 137                 hb[2] = htons(hb[2]);
 138                 cvtbase(65536L, 256, hb, i, out, len);
 139                 return;
 140         }
 141
 142         /* Need to decide if base 10, 16 or 8 */
 143         while (*bp) switch (*bp++) {
 144
 145         case '0': case '1': case '2': case '3': case '4': case '5':
 146         case '6': case '7': case '-':
 147                 break;
 148
 149         case '8': case '9':
 150                 base10 = 1;
 151                 break;
 152
 153         case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
 154         case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
 155                 base16 = 1;
 156                 break;
 157
 158         case 'x': case 'X':
 159                 *--bp = '0';
 160                 base16 = 1;
 161                 break;
 162
 163         case 'h': case 'H':
 164                 base16 = 1;
 165                 /* fall into */
 166
 167         default:
 168                 *--bp = 0; /* Ends Loop */
 169         }
 170         if (base16) {
 171                 fmt = "%3x";
 172                 ibase = 4096;
 173         } else if (base10 == 0 && *buf == '0') {
 174                 fmt = "%3o";
 175                 ibase = 512;
 176         } else {
 177                 fmt = "%3d";
 178                 ibase = 1000;
 179         }
 180
 181         for (bp = buf; *bp++; ) clen++;
 182         if (clen == 0) clen++;
 183         if (clen > 18) clen = 18;
 184         i = ((clen - 1) / 3) + 1;
 185         bp = clen + buf - 3;
 186         hp = hb + i - 1;
 187
 188         while (hp > hb) {
 189                 (void)sscanf(bp, fmt, hp);
 190                 bp[0] = 0;
 191                 hp--;
 192                 bp -= 3;
 193         }
 194         (void)sscanf(buf, fmt, hp);
 195         cvtbase((long)ibase, 256, hb, i, out, len);
 196 }
 197
 198 static void
 199 cvtbase(long oldbase, int newbase, int input[], int inlen,
 200         unsigned char result[], int reslen)
 201 {
 202         int d, e;
 203         long sum;
 204
 205         e = 1;
 206         while (e > 0 && reslen > 0) {
 207                 d = 0; e = 0; sum = 0;
 208                 /* long division: input=input/newbase */
 209                 while (d < inlen) {
 210                         sum = sum*oldbase + (long) input[d];
 211                         e += (sum > 0);
 212                         input[d++] = sum / newbase;
 213                         sum %= newbase;
 214                 }
 215                 result[--reslen] = sum; /* accumulate remainder */
 216         }
 217         for (d=0; d < reslen; d++)
 218                 result[d] = 0;
 219 }