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/*
* convert binary form of subnet description to ASCII
* Copyright (C) 1998, 1999 Henry Spencer.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Library General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/lgpl.txt>.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
* License for more details.
*
* RCSID $Id: subnettoa.c 3265 2007-10-08 19:52:55Z andreas $
*/
#include "internal.h"
#include "freeswan.h"
/*
- subnettoa - convert address and mask to ASCII "addr/mask"
* Output expresses the mask as a bit count if possible, else dotted decimal.
*/
size_t /* space needed for full conversion */
subnettoa(addr, mask, format, dst, dstlen)
struct in_addr addr;
struct in_addr mask;
int format; /* character */
char *dst; /* need not be valid if dstlen is 0 */
size_t dstlen;
{
size_t len;
size_t rest;
int n;
char *p;
switch (format) {
case 0:
break;
default:
return 0;
break;
}
len = addrtoa(addr, 0, dst, dstlen);
if (len < dstlen) {
dst[len - 1] = '/';
p = dst + len;
rest = dstlen - len;
} else {
p = NULL;
rest = 0;
}
n = masktobits(mask);
if (n >= 0)
len += ultoa((unsigned long)n, 10, p, rest);
else
len += addrtoa(mask, 0, p, rest);
return len;
}
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