/*

 * Copyright (c) 1996-1999 by Internet Software Consortium.

 *

 * Permission to use, copy, modify, and distribute this software for any

 * purpose with or without fee is hereby granted, provided that the above

 * copyright notice and this permission notice appear in all copies.

 *

 * THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM DISCLAIMS

 * ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES

 * OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE

 * CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL

 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR

 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS

 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS

 * SOFTWARE.

 */

#include <sys/types.h>

#include <sys/param.h>

#include <sys/socket.h>

#include <netinet/in.h>

#include <arpa/inet.h>

#include <arpa/nameser.h>

#include <ctype.h>

#include <resolv.h>

static char

xtob(int c) {

	return (c - (((c >= '0') && (c <= '9')) ? '0' : '7'));

}

u_int

inet_nsap_addr(const char *ascii, u_char *binary, int maxlen) {

	u_char c, nib;

	u_int len = 0;

	while ((c = *ascii++) != '\0' && len < (u_int)maxlen) {

		if (c == '.' || c == '+' || c == '/')

			continue;

		if (!isascii(c))

			return (0);

		c = toupper(c);

		if (isxdigit(c)) {

			nib = xtob(c);

			c = *ascii++;

			if (c != '\0') {

				c = toupper(c);

				if (isxdigit(c)) {

					*binary++ = (nib << 4) | xtob(c);

					len++;

				} else

					return (0);

			}

			else

				return (0);

		}

		else

			return (0);

	}

	return (len);

}

char *

inet_nsap_ntoa(int binlen, const u_char *binary, char *ascii) {

	int nib;

	int i;

	static char tmpbuf[255*2 + 128];

	char *start;

	if (ascii)

		start = ascii;

	else {

		ascii = tmpbuf;

		start = tmpbuf;

	}

	if (binlen > 255)

		binlen = 255;

	for (i = 0; i < binlen; i++) {

		nib = *binary >> 4;

		*ascii++ = nib + (nib < 10 ? '0' : '7');

		nib = *binary++ & 0x0f;

		*ascii++ = nib + (nib < 10 ? '0' : '7');

		if (((i % 2) == 0 && (i + 1) < binlen))

			*ascii++ = '.';

	}

	*ascii = '\0';

	return (start);

}