net/inet_network.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) 1983, 1993
  24  *      The Regents of the University of California.  All rights reserved.
  25  *
  26  * Redistribution and use in source and binary forms, with or without
  27  * modification, are permitted provided that the following conditions
  28  * are met:
  29  * 1. Redistributions of source code must retain the above copyright
  30  *    notice, this list of conditions and the following disclaimer.
  31  * 2. Redistributions in binary form must reproduce the above copyright
  32  *    notice, this list of conditions and the following disclaimer in the
  33  *    documentation and/or other materials provided with the distribution.
  34  * 3. All advertising materials mentioning features or use of this software
  35  *    must display the following acknowledgement:
  36  *      This product includes software developed by the University of
  37  *      California, Berkeley and its contributors.
  38  * 4. Neither the name of the University nor the names of its contributors
  39  *    may be used to endorse or promote products derived from this software
  40  *    without specific prior written permission.
  41  *
  42  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  43  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  44  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  45  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  46  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  47  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  48  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  49  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  50  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  51  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  52  * SUCH DAMAGE.
  53  */
  54
  55
  56 #include <sys/types.h>
  57 #include <netinet/in.h>
  58 #include <arpa/inet.h>
  59 #include <ctype.h>
  60
  61 /*
  62  * Internet network address interpretation routine.
  63  * The library routines call this routine to interpret
  64  * network numbers.
  65  */
  66 u_long
  67 inet_network(cp)
  68         register const char *cp;
  69 {
  70         register u_long val, base, n;
  71         register char c;
  72         u_long parts[4], *pp = parts;
  73         register int i;
  74
  75 again:
  76         val = 0; base = 10;
  77         if (*cp == '0')
  78                 base = 8, cp++;
  79         if (*cp == 'x' || *cp == 'X')
  80                 base = 16, cp++;
  81         while (c = *cp) {
  82                 if (isdigit(c)) {
  83                         val = (val * base) + (c - '0');
  84                         cp++;
  85                         continue;
  86                 }
  87                 if (base == 16 && isxdigit(c)) {
  88                         val = (val << 4) + (c + 10 - (islower(c) ? 'a' : 'A'));
  89                         cp++;
  90                         continue;
  91                 }
  92                 break;
  93         }
  94         if (*cp == '.') {
  95                 if (pp >= parts + 4)
  96                         return (INADDR_NONE);
  97                 *pp++ = val, cp++;
  98                 goto again;
  99         }
 100         if (*cp && !isspace(*cp))
 101                 return (INADDR_NONE);
 102         *pp++ = val;
 103         n = pp - parts;
 104         if (n > 4)
 105                 return (INADDR_NONE);
 106         for (val = 0, i = 0; i < n; i++) {
 107                 val <<= 8;
 108                 val |= parts[i] & 0xff;
 109         }
 110         return (val);
 111 }