net/nsap_addr-fbsd.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 #include <sys/cdefs.h>
  19 __FBSDID("$FreeBSD: src/lib/libc/net/nsap_addr.c,v 1.9 2002/03/22 21:52:29 obrien Exp $");
  20
  21 #include "xlocale_private.h"
  22
  23 #include <sys/types.h>
  24 #include <sys/param.h>
  25 #include <sys/socket.h>
  26 #include <netinet/in.h>
  27 #include <arpa/inet.h>
  28 #include <arpa/nameser.h>
  29 #include <ctype.h>
  30 #include <resolv.h>
  31 #include <stdlib.h>
  32
  33 static char
  34 xtob(c)
  35         int c;
  36 {
  37         return (c - (((c >= '0') && (c <= '9')) ? '0' : '7'));
  38 }
  39
  40 u_int
  41 inet_nsap_addr(ascii, binary, maxlen)
  42         const char *ascii;
  43         u_char *binary;
  44         int maxlen;
  45 {
  46         u_char c, nib;
  47         u_int len = 0;
  48         locale_t loc = __current_locale();
  49
  50         while ((c = *ascii++) != '\0' && len < (u_int)maxlen) {
  51                 if (c == '.' || c == '+' || c == '/')
  52                         continue;
  53                 if (!isascii(c))
  54                         return (0);
  55                 if (islower_l(c, loc))
  56                         c = toupper_l(c, loc);
  57                 if (isxdigit_l(c, loc)) {
  58                         nib = xtob(c);
  59                         c = *ascii++;
  60                         if (c != '\0') {
  61                                 c = toupper_l(c, loc);
  62                                 if (isxdigit_l(c, loc)) {
  63                                         *binary++ = (nib << 4) | xtob(c);
  64                                         len++;
  65                                 } else
  66                                         return (0);
  67                         }
  68                         else
  69                                 return (0);
  70                 }
  71                 else
  72                         return (0);
  73         }
  74         return (len);
  75 }
  76
  77 char *
  78 inet_nsap_ntoa(binlen, binary, ascii)
  79         int binlen;
  80         const u_char *binary;
  81         char *ascii;
  82 {
  83         int nib;
  84         int i;
  85         static char *tmpbuf = NULL;
  86         char *start;
  87
  88         if (tmpbuf == NULL) {
  89                 tmpbuf = malloc(255*3);
  90                 if (tmpbuf == NULL)
  91                         return NULL;
  92         }
  93         if (ascii)
  94                 start = ascii;
  95         else {
  96                 ascii = tmpbuf;
  97                 start = tmpbuf;
  98         }
  99
 100         if (binlen > 255)
 101                 binlen = 255;
 102
 103         for (i = 0; i < binlen; i++) {
 104                 nib = *binary >> 4;
 105                 *ascii++ = nib + (nib < 10 ? '0' : '7');
 106                 nib = *binary++ & 0x0f;
 107                 *ascii++ = nib + (nib < 10 ? '0' : '7');
 108                 if (((i % 2) == 0 && (i + 1) < binlen))
 109                         *ascii++ = '.';
 110         }
 111         *ascii = '\0';
 112         return (start);
 113 }
 114
 115 /*
 116  * Weak aliases for applications that use certain private entry points,
 117  * and fail to include <arpa/inet.h>.
 118  */
 119 #undef inet_nsap_addr
 120 __weak_reference(__inet_nsap_addr, inet_nsap_addr);
 121 #undef inet_nsap_ntoa
 122 __weak_reference(__inet_nsap_ntoa, inet_nsap_ntoa);