net.subproj/iso_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) 1989, 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 <netiso/iso.h>
  58 #include <string.h>
  59
  60 /* States*/
  61 #define VIRGIN  0
  62 #define GOTONE  1
  63 #define GOTTWO  2
  64 /* Inputs */
  65 #define DIGIT   (4*0)
  66 #define END     (4*1)
  67 #define DELIM   (4*2)
  68
  69 struct iso_addr *
  70 iso_addr(addr)
  71         register const char *addr;
  72 {
  73         static struct iso_addr out_addr;
  74         register char *cp = out_addr.isoa_genaddr;
  75         char *cplim = cp + sizeof(out_addr.isoa_genaddr);
  76         register int byte = 0, state = VIRGIN, new;
  77
  78         bzero((char *)&out_addr, sizeof(out_addr));
  79         do {
  80                 if ((*addr >= '0') && (*addr <= '9')) {
  81                         new = *addr - '0';
  82                 } else if ((*addr >= 'a') && (*addr <= 'f')) {
  83                         new = *addr - 'a' + 10;
  84                 } else if ((*addr >= 'A') && (*addr <= 'F')) {
  85                         new = *addr - 'A' + 10;
  86                 } else if (*addr == 0)
  87                         state |= END;
  88                 else
  89                         state |= DELIM;
  90                 addr++;
  91                 switch (state /* | INPUT */) {
  92                 case GOTTWO | DIGIT:
  93                         *cp++ = byte; /*FALLTHROUGH*/
  94                 case VIRGIN | DIGIT:
  95                         state = GOTONE; byte = new; continue;
  96                 case GOTONE | DIGIT:
  97                         state = GOTTWO; byte = new + (byte << 4); continue;
  98                 default: /* | DELIM */
  99                         state = VIRGIN; *cp++ = byte; byte = 0; continue;
 100                 case GOTONE | END:
 101                 case GOTTWO | END:
 102                         *cp++ = byte; /* FALLTHROUGH */
 103                 case VIRGIN | END:
 104                         break;
 105                 }
 106                 break;
 107         } while (cp < cplim);
 108         out_addr.isoa_len = cp - out_addr.isoa_genaddr;
 109         return (&out_addr);
 110 }
 111 static char hexlist[] = "0123456789abcdef";
 112
 113 char *
 114 iso_ntoa(isoa)
 115         const struct iso_addr *isoa;
 116 {
 117         static char obuf[64];
 118         register char *out = obuf;
 119         register int i;
 120         register u_char *in = (u_char *)isoa->isoa_genaddr;
 121         u_char *inlim = in + isoa->isoa_len;
 122
 123         out[1] = 0;
 124         while (in < inlim) {
 125                 i = *in++;
 126                 *out++ = '.';
 127                 if (i > 0xf) {
 128                         out[1] = hexlist[i & 0xf];
 129                         i >>= 4;
 130                         out[0] = hexlist[i];
 131                         out += 2;
 132                 } else
 133                         *out++ = hexlist[i];
 134         }
 135         *out = 0;
 136         return(obuf + 1);
 137 }