contrib/bind-9.2.4rc7/lib/bind/inet/nsap_addr.c

   1 /*
   2  * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
   3  * Copyright (c) 1996-1999 by Internet Software Consortium.
   4  *
   5  * Permission to use, copy, modify, and distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice appear in all copies.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
  10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  11  * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
  12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
  15  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  16  */
  17
  18 #if defined(LIBC_SCCS) && !defined(lint)
  19 static const char rcsid[] = "$Id: nsap_addr.c,v 1.2.2.1 2004/03/09 09:17:27 marka Exp $";
  20 #endif /* LIBC_SCCS and not lint */
  21
  22 #include "port_before.h"
  23
  24 #include <sys/types.h>
  25 #include <sys/param.h>
  26 #include <sys/socket.h>
  27
  28 #include <netinet/in.h>
  29 #include <arpa/inet.h>
  30 #include <arpa/nameser.h>
  31
  32 #include <ctype.h>
  33 #include <resolv.h>
  34
  35 #include "port_after.h"
  36
  37 static char
  38 xtob(int c) {
  39         return (c - (((c >= '0') && (c <= '9')) ? '0' : '7'));
  40 }
  41
  42 u_int
  43 inet_nsap_addr(const char *ascii, u_char *binary, int maxlen) {
  44         u_char c, nib;
  45         u_int len = 0;
  46
  47         if (ascii[0] != '0' || (ascii[1] != 'x' && ascii[1] != 'X'))
  48                 return (0);
  49         ascii += 2;
  50
  51         while ((c = *ascii++) != '\0' && len < (u_int)maxlen) {
  52                 if (c == '.' || c == '+' || c == '/')
  53                         continue;
  54                 if (!isascii(c))
  55                         return (0);
  56                 if (islower(c))
  57                         c = toupper(c);
  58                 if (isxdigit(c)) {
  59                         nib = xtob(c);
  60                         c = *ascii++;
  61                         if (c != '\0') {
  62                                 c = toupper(c);
  63                                 if (isxdigit(c)) {
  64                                         *binary++ = (nib << 4) | xtob(c);
  65                                         len++;
  66                                 } else
  67                                         return (0);
  68                         }
  69                         else
  70                                 return (0);
  71                 }
  72                 else
  73                         return (0);
  74         }
  75         return (len);
  76 }
  77
  78 char *
  79 inet_nsap_ntoa(int binlen, const u_char *binary, char *ascii) {
  80         int nib;
  81         int i;
  82         static char tmpbuf[2+255*3];
  83         char *start;
  84
  85         if (ascii)
  86                 start = ascii;
  87         else {
  88                 ascii = tmpbuf;
  89                 start = tmpbuf;
  90         }
  91
  92         *ascii++ = '0';
  93         *ascii++ = 'x';
  94
  95         if (binlen > 255)
  96                 binlen = 255;
  97
  98         for (i = 0; i < binlen; i++) {
  99                 nib = *binary >> 4;
 100                 *ascii++ = nib + (nib < 10 ? '0' : '7');
 101                 nib = *binary++ & 0x0f;
 102                 *ascii++ = nib + (nib < 10 ? '0' : '7');
 103                 if (((i % 2) == 0 && (i + 1) < binlen))
 104                         *ascii++ = '.';
 105         }
 106         *ascii = '\0';
 107         return (start);
 108 }