src/kits/network/netresolv/inet/nsap_addr.c

   1 /*      $NetBSD: nsap_addr.c,v 1.6 2009/04/12 17:07:17 christos Exp $   */
   2
   3 /*
   4  * Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
   5  * Copyright (c) 1996-1999 by Internet Software Consortium.
   6  *
   7  * Permission to use, copy, modify, and distribute this software for any
   8  * purpose with or without fee is hereby granted, provided that the above
   9  * copyright notice and this permission notice appear in all copies.
  10  *
  11  * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
  12  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  13  * MERCHANTABILITY AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR
  14  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  15  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  16  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
  17  * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  18  */
  19
  20 #include <sys/cdefs.h>
  21 #if defined(LIBC_SCCS) && !defined(lint)
  22 #if 0
  23 static const char rcsid[] = "Id: nsap_addr.c,v 1.5 2005/07/28 06:51:48 marka Exp";
  24 #else
  25 __RCSID("$NetBSD: nsap_addr.c,v 1.6 2009/04/12 17:07:17 christos Exp $");
  26 #endif
  27 #endif /* LIBC_SCCS and not lint */
  28
  29 #include "port_before.h"
  30
  31 #include <sys/types.h>
  32 #include <sys/param.h>
  33 #include <sys/socket.h>
  34
  35 #include <netinet/in.h>
  36 #include <arpa/inet.h>
  37 #include <arpa/nameser.h>
  38
  39 #include <assert.h>
  40 #include <ctype.h>
  41 #include <resolv.h>
  42 #include <resolv_mt.h>
  43
  44 #include "port_after.h"
  45
  46 static char
  47 xtob(int c) {
  48         return (c - (((c >= '0') && (c <= '9')) ? '0' : '7'));
  49 }
  50
  51 u_int
  52 inet_nsap_addr(const char *ascii, u_char *binary, int maxlen) {
  53         u_char c, nib;
  54         u_int len = 0;
  55
  56         assert(ascii != NULL);
  57         assert(binary != NULL);
  58
  59         if (ascii[0] != '0' || (ascii[1] != 'x' && ascii[1] != 'X'))
  60                 return (0);
  61         ascii += 2;
  62
  63         while ((c = *ascii++) != '\0' && len < (u_int)maxlen) {
  64                 if (c == '.' || c == '+' || c == '/')
  65                         continue;
  66                 if (!isascii(c))
  67                         return (0);
  68                 if (islower(c))
  69                         c = toupper(c);
  70                 if (isxdigit(c)) {
  71                         nib = xtob(c);
  72                         c = *ascii++;
  73                         if (c != '\0') {
  74                                 c = toupper(c);
  75                                 if (isxdigit(c)) {
  76                                         *binary++ = (nib << 4) | xtob(c);
  77                                         len++;
  78                                 } else
  79                                         return (0);
  80                         }
  81                         else
  82                                 return (0);
  83                 }
  84                 else
  85                         return (0);
  86         }
  87         return (len);
  88 }
  89
  90 char *
  91 inet_nsap_ntoa(int binlen, const u_char *binary, char *ascii) {
  92         int nib;
  93         int i;
  94         char *tmpbuf = inet_nsap_ntoa_tmpbuf;
  95         char *start;
  96
  97         assert(binary != NULL);
  98
  99         if (ascii)
 100                 start = ascii;
 101         else {
 102                 ascii = tmpbuf;
 103                 start = tmpbuf;
 104         }
 105
 106         *ascii++ = '0';
 107         *ascii++ = 'x';
 108
 109         if (binlen > 255)
 110                 binlen = 255;
 111
 112         for (i = 0; i < binlen; i++) {
 113                 nib = (u_int32_t)*binary >> 4;
 114                 *ascii++ = nib + (nib < 10 ? '0' : '7');
 115                 nib = *binary++ & 0x0f;
 116                 *ascii++ = nib + (nib < 10 ? '0' : '7');
 117                 if (((i % 2) == 0 && (i + 1) < binlen))
 118                         *ascii++ = '.';
 119         }
 120         *ascii = '\0';
 121         return (start);
 122 }
 123
 124 #undef inet_nsap_addr
 125 #pragma weak inet_nsap_addr = __inet_nsap_addr
 126 #undef inet_nsap_ntoa
 127 #pragma weak inet_nsap_ntoa = __inet_nsap_ntoa