104 lines
2.3 KiB
C
104 lines
2.3 KiB
C
/*
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* Copyright (c) 1996 by Internet Software Consortium.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS
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* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
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* CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
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* SOFTWARE.
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*/
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#if defined(LIBC_SCCS) && !defined(lint)
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static char rcsid[] = "$Id$";
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#endif /* LIBC_SCCS and not lint */
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/nameser.h>
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#include <ctype.h>
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#include <resolv.h>
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static char
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xtob(c)
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register int c;
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{
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return (c - (((c >= '0') && (c <= '9')) ? '0' : '7'));
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}
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u_int
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inet_nsap_addr(ascii, binary, maxlen)
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const char *ascii;
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u_char *binary;
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int maxlen;
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{
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register u_char c, nib;
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u_int len = 0;
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while ((c = *ascii++) != '\0' && len < maxlen) {
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if (c == '.' || c == '+' || c == '/')
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continue;
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if (!isascii(c))
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return (0);
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if (islower(c))
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c = toupper(c);
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if (isxdigit(c)) {
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nib = xtob(c);
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if ((c = *ascii++) != '\0') {
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c = toupper(c);
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if (isxdigit(c)) {
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*binary++ = (nib << 4) | xtob(c);
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len++;
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} else
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return (0);
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}
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else
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return (0);
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}
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else
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return (0);
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}
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return (len);
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}
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char *
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inet_nsap_ntoa(binlen, binary, ascii)
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int binlen;
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register const u_char *binary;
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register char *ascii;
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{
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register int nib;
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int i;
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static char tmpbuf[255*3];
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char *start;
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if (ascii)
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start = ascii;
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else {
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ascii = tmpbuf;
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start = tmpbuf;
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}
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if (binlen > 255)
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binlen = 255;
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for (i = 0; i < binlen; i++) {
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nib = *binary >> 4;
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*ascii++ = nib + (nib < 10 ? '0' : '7');
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nib = *binary++ & 0x0f;
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*ascii++ = nib + (nib < 10 ? '0' : '7');
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if (((i % 2) == 0 && (i + 1) < binlen))
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*ascii++ = '.';
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}
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*ascii = '\0';
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return (start);
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}
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