StdLib/BsdSocketLib/nsap_addr.c

   1 /*
   2  * Copyright (c) 1996, 1998 by Internet Software Consortium.
   3  *
   4  * Permission to use, copy, modify, and distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
   9  * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
  10  * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
  11  * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
  12  * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
  13  * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
  14  * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
  15  * SOFTWARE.
  16  */
  17
  18 #if defined(LIBC_SCCS) && !defined(lint)
  19 static char rcsid[] = "$Id: nsap_addr.c,v 1.1.1.1 2003/11/19 01:51:31 kyu3 Exp $";
  20 #endif /* LIBC_SCCS and not lint */
  21
  22 #include <sys/types.h>
  23 #include <sys/param.h>
  24 #include <sys/socket.h>
  25 #include <netinet/in.h>
  26 #include <arpa/inet.h>
  27 #include <arpa/nameser.h>
  28 #include <ctype.h>
  29 #include <resolv.h>
  30
  31 static char
  32 xtob(
  33         register int c
  34         )
  35 {
  36         return (char)(c - (((c >= '0') && (c <= '9')) ? '0' : '7'));
  37 }
  38
  39 u_int
  40 inet_nsap_addr(
  41         const char *ascii,
  42         u_char *binary,
  43         int maxlen
  44         )
  45 {
  46         u_char c, nib;
  47         u_int len = 0;
  48
  49         while ((c = *ascii++) != '\0' && len < (u_int)maxlen) {
  50                 if (c == '.' || c == '+' || c == '/')
  51                         continue;
  52                 if (!isascii(c))
  53                         return (0);
  54                 if (islower(c))
  55                         c = (u_char)( toupper(c));
  56                 if (isxdigit(c)) {
  57                         nib = xtob(c);
  58                         c = *ascii++;
  59                         if (c != '\0') {
  60                                 c = (u_char)( toupper(c));
  61                                 if (isxdigit(c)) {
  62                                         *binary++ = (nib << 4) | xtob(c);
  63                                         len++;
  64                                 } else
  65                                         return (0);
  66                         }
  67                         else
  68                                 return (0);
  69                 }
  70                 else
  71                         return (0);
  72         }
  73         return (len);
  74 }
  75
  76 char *
  77 inet_nsap_ntoa(
  78         int binlen,
  79         register const u_char *binary,
  80         register char *ascii
  81         )
  82 {
  83         register int nib;
  84         int i;
  85         static char tmpbuf[255*3];
  86         char *start;
  87
  88         if (ascii)
  89                 start = ascii;
  90         else {
  91                 ascii = tmpbuf;
  92                 start = tmpbuf;
  93         }
  94
  95         if (binlen > 255)
  96                 binlen = 255;
  97
  98         for (i = 0; i < binlen; i++) {
  99                 nib = *binary >> 4;
 100                 *ascii++ = (char)( nib + (nib < 10 ? '0' : '7'));
 101                 nib = *binary++ & 0x0f;
 102                 *ascii++ = (char)( nib + (nib < 10 ? '0' : '7'));
 103                 if (((i % 2) == 0 && (i + 1) < binlen))
 104                         *ascii++ = '.';
 105         }
 106         *ascii = '\0';
 107         return (start);
 108 }