net/FreeBSD/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 1.3.18.2 2005/07/28 07:38:08 marka Exp $";
  20
  21 /* the algorithms only can deal with ASCII, so we optimize for it */
  22 #define USE_ASCII
  23
  24 #endif /* LIBC_SCCS and not lint */
  25 #include <sys/cdefs.h>
  26 __FBSDID("$FreeBSD: src/lib/libc/inet/nsap_addr.c,v 1.3 2007/06/03 17:20:26 ume Exp $");
  27
  28 #include "port_before.h"
  29
  30 #include <sys/types.h>
  31 #include <sys/param.h>
  32 #include <sys/socket.h>
  33
  34 #include <netinet/in.h>
  35 #include <arpa/inet.h>
  36 #include <arpa/nameser.h>
  37
  38 #include <ctype.h>
  39 #include <resolv.h>
  40 //#include <resolv_mt.h>
  41
  42 #include "port_after.h"
  43
  44 #include <stdlib.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         if (ascii[0] != '0' || (ascii[1] != 'x' && ascii[1] != 'X'))
  57                 return (0);
  58         ascii += 2;
  59
  60         while ((c = *ascii++) != '\0' && len < (u_int)maxlen) {
  61                 if (c == '.' || c == '+' || c == '/')
  62                         continue;
  63                 if (!isascii(c))
  64                         return (0);
  65                 if (islower(c))
  66                         c = toupper(c);
  67                 if (isxdigit(c)) {
  68                         nib = xtob(c);
  69                         c = *ascii++;
  70                         if (c != '\0') {
  71                                 c = toupper(c);
  72                                 if (isxdigit(c)) {
  73                                         *binary++ = (nib << 4) | xtob(c);
  74                                         len++;
  75                                 } else
  76                                         return (0);
  77                         }
  78                         else
  79                                 return (0);
  80                 }
  81                 else
  82                         return (0);
  83         }
  84         return (len);
  85 }
  86
  87 char *
  88 inet_nsap_ntoa(int binlen, const u_char *binary, char *ascii) {
  89         int nib;
  90         int i;
  91         char *tmpbuf = NULL;
  92         char *start;
  93
  94         if (tmpbuf == NULL) {
  95                 tmpbuf = malloc(255*3);
  96                 if (tmpbuf == NULL) return NULL;
  97         }
  98         if (ascii)
  99                 start = ascii;
 100         else {
 101                 ascii = tmpbuf;
 102                 start = tmpbuf;
 103         }
 104
 105         *ascii++ = '0';
 106         *ascii++ = 'x';
 107
 108         if (binlen > 255)
 109                 binlen = 255;
 110
 111         for (i = 0; i < binlen; i++) {
 112                 nib = *binary >> 4;
 113                 *ascii++ = nib + (nib < 10 ? '0' : '7');
 114                 nib = *binary++ & 0x0f;
 115                 *ascii++ = nib + (nib < 10 ? '0' : '7');
 116                 if (((i % 2) == 0 && (i + 1) < binlen))
 117                         *ascii++ = '.';
 118         }
 119         *ascii = '\0';
 120         return (start);
 121 }
 122
 123 /*
 124  * Weak aliases for applications that use certain private entry points,
 125  * and fail to include <arpa/inet.h>.
 126  */
 127 #undef inet_nsap_addr
 128 __weak_reference(__inet_nsap_addr, inet_nsap_addr);
 129 #undef inet_nsap_ntoa
 130 __weak_reference(__inet_nsap_ntoa, inet_nsap_ntoa);
 131
 132 /*! \file */