net.subproj/ns_addr.c

   1 /*
   2  * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_LICENSE_HEADER_START@
   5  *
   6  * The contents of this file constitute Original Code as defined in and
   7  * are subject to the Apple Public Source License Version 1.1 (the
   8  * "License").  You may not use this file except in compliance with the
   9  * License.  Please obtain a copy of the License at
  10  * http://www.apple.com/publicsource and read it before using this file.
  11  *
  12  * This Original Code and all software distributed under the License are
  13  * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  14  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  15  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
  17  * License for the specific language governing rights and limitations
  18  * under the License.
  19  *
  20  * @APPLE_LICENSE_HEADER_END@
  21  */
  22 /*
  23  * Copyright (c) 1986, 1993
  24  *      The Regents of the University of California.  All rights reserved.
  25  *
  26  * This code is derived from software contributed to Berkeley by
  27  * J.Q. Johnson.
  28  *
  29  * Redistribution and use in source and binary forms, with or without
  30  * modification, are permitted provided that the following conditions
  31  * are met:
  32  * 1. Redistributions of source code must retain the above copyright
  33  *    notice, this list of conditions and the following disclaimer.
  34  * 2. Redistributions in binary form must reproduce the above copyright
  35  *    notice, this list of conditions and the following disclaimer in the
  36  *    documentation and/or other materials provided with the distribution.
  37  * 3. All advertising materials mentioning features or use of this software
  38  *    must display the following acknowledgement:
  39  *      This product includes software developed by the University of
  40  *      California, Berkeley and its contributors.
  41  * 4. Neither the name of the University nor the names of its contributors
  42  *    may be used to endorse or promote products derived from this software
  43  *    without specific prior written permission.
  44  *
  45  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  46  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  47  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  48  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  49  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  50  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  51  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  52  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  53  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  54  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  55  * SUCH DAMAGE.
  56  */
  57
  58
  59 #include <sys/param.h>
  60 #include <netns/ns.h>
  61 #include <stdio.h>
  62 #include <string.h>
  63
  64 static struct ns_addr addr, zero_addr;
  65
  66 static void Field(), cvtbase();
  67
  68 struct ns_addr
  69 ns_addr(name)
  70         const char *name;
  71 {
  72         char separator;
  73         char *hostname, *socketname, *cp;
  74         char buf[50];
  75
  76         (void)strncpy(buf, name, sizeof(buf) - 1);
  77         buf[sizeof(buf) - 1] = '\0';
  78
  79         /*
  80          * First, figure out what he intends as a field separtor.
  81          * Despite the way this routine is written, the prefered
  82          * form  2-272.AA001234H.01777, i.e. XDE standard.
  83          * Great efforts are made to insure backward compatability.
  84          */
  85         if (hostname = strchr(buf, '#'))
  86                 separator = '#';
  87         else {
  88                 hostname = strchr(buf, '.');
  89                 if ((cp = strchr(buf, ':')) &&
  90                     ((hostname && cp < hostname) || (hostname == 0))) {
  91                         hostname = cp;
  92                         separator = ':';
  93                 } else
  94                         separator = '.';
  95         }
  96         if (hostname)
  97                 *hostname++ = 0;
  98
  99         addr = zero_addr;
 100         Field(buf, addr.x_net.c_net, 4);
 101         if (hostname == 0)
 102                 return (addr);  /* No separator means net only */
 103
 104         socketname = strchr(hostname, separator);
 105         if (socketname) {
 106                 *socketname++ = 0;
 107                 Field(socketname, (u_char *)&addr.x_port, 2);
 108         }
 109
 110         Field(hostname, addr.x_host.c_host, 6);
 111
 112         return (addr);
 113 }
 114
 115 static void
 116 Field(buf, out, len)
 117         char *buf;
 118         u_char *out;
 119         int len;
 120 {
 121         register char *bp = buf;
 122         int i, ibase, base16 = 0, base10 = 0, clen = 0;
 123         int hb[6], *hp;
 124         char *fmt;
 125
 126         /*
 127          * first try 2-273#2-852-151-014#socket
 128          */
 129         if ((*buf != '-') &&
 130             (1 < (i = sscanf(buf, "%d-%d-%d-%d-%d",
 131                         &hb[0], &hb[1], &hb[2], &hb[3], &hb[4])))) {
 132                 cvtbase(1000L, 256, hb, i, out, len);
 133                 return;
 134         }
 135         /*
 136          * try form 8E1#0.0.AA.0.5E.E6#socket
 137          */
 138         if (1 < (i = sscanf(buf,"%x.%x.%x.%x.%x.%x",
 139                         &hb[0], &hb[1], &hb[2], &hb[3], &hb[4], &hb[5]))) {
 140                 cvtbase(256L, 256, hb, i, out, len);
 141                 return;
 142         }
 143         /*
 144          * try form 8E1#0:0:AA:0:5E:E6#socket
 145          */
 146         if (1 < (i = sscanf(buf,"%x:%x:%x:%x:%x:%x",
 147                         &hb[0], &hb[1], &hb[2], &hb[3], &hb[4], &hb[5]))) {
 148                 cvtbase(256L, 256, hb, i, out, len);
 149                 return;
 150         }
 151         /*
 152          * This is REALLY stretching it but there was a
 153          * comma notation separting shorts -- definitely non standard
 154          */
 155         if (1 < (i = sscanf(buf,"%x,%x,%x",
 156                         &hb[0], &hb[1], &hb[2]))) {
 157                 hb[0] = htons(hb[0]); hb[1] = htons(hb[1]);
 158                 hb[2] = htons(hb[2]);
 159                 cvtbase(65536L, 256, hb, i, out, len);
 160                 return;
 161         }
 162
 163         /* Need to decide if base 10, 16 or 8 */
 164         while (*bp) switch (*bp++) {
 165
 166         case '0': case '1': case '2': case '3': case '4': case '5':
 167         case '6': case '7': case '-':
 168                 break;
 169
 170         case '8': case '9':
 171                 base10 = 1;
 172                 break;
 173
 174         case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
 175         case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
 176                 base16 = 1;
 177                 break;
 178
 179         case 'x': case 'X':
 180                 *--bp = '0';
 181                 base16 = 1;
 182                 break;
 183
 184         case 'h': case 'H':
 185                 base16 = 1;
 186                 /* fall into */
 187
 188         default:
 189                 *--bp = 0; /* Ends Loop */
 190         }
 191         if (base16) {
 192                 fmt = "%3x";
 193                 ibase = 4096;
 194         } else if (base10 == 0 && *buf == '0') {
 195                 fmt = "%3o";
 196                 ibase = 512;
 197         } else {
 198                 fmt = "%3d";
 199                 ibase = 1000;
 200         }
 201
 202         for (bp = buf; *bp++; ) clen++;
 203         if (clen == 0) clen++;
 204         if (clen > 18) clen = 18;
 205         i = ((clen - 1) / 3) + 1;
 206         bp = clen + buf - 3;
 207         hp = hb + i - 1;
 208
 209         while (hp > hb) {
 210                 (void)sscanf(bp, fmt, hp);
 211                 bp[0] = 0;
 212                 hp--;
 213                 bp -= 3;
 214         }
 215         (void)sscanf(buf, fmt, hp);
 216         cvtbase((long)ibase, 256, hb, i, out, len);
 217 }
 218
 219 static void
 220 cvtbase(oldbase,newbase,input,inlen,result,reslen)
 221         long oldbase;
 222         int newbase;
 223         int input[];
 224         int inlen;
 225         unsigned char result[];
 226         int reslen;
 227 {
 228         int d, e;
 229         long sum;
 230
 231         e = 1;
 232         while (e > 0 && reslen > 0) {
 233                 d = 0; e = 0; sum = 0;
 234                 /* long division: input=input/newbase */
 235                 while (d < inlen) {
 236                         sum = sum*oldbase + (long) input[d];
 237                         e += (sum > 0);
 238                         input[d++] = sum / newbase;
 239                         sum %= newbase;
 240                 }
 241                 result[--reslen] = sum; /* accumulate remainder */
 242         }
 243         for (d=0; d < reslen; d++)
 244                 result[d] = 0;
 245 }