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/*
* convert binary form of subnet description to text
* Copyright (C) 2000 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: subnettot.c,v 1.6 2004/04/09 18:00:36 mcr Exp $
*/
#include "internal.h"
#include "openswan.h"
/*
- subnettot - convert subnet to text "addr/bitcount"
*/
size_t /* space needed for full conversion */
subnettot(sub, format, dst, dstlen)
const ip_subnet *sub;
int format; /* character */
char *dst; /* need not be valid if dstlen is 0 */
size_t dstlen;
{
size_t len;
size_t rest;
char *p;
switch (format) {
case 0:
break;
default:
return 0;
break;
}
len = addrtot(&sub->addr, format, dst, dstlen);
if (len < dstlen) {
dst[len - 1] = '/';
p = dst + len;
rest = dstlen - len;
} else {
p = NULL;
rest = 0;
}
len += ultoa((unsigned long)sub->maskbits, 10, p, rest);
return len;
}
size_t
subnetporttot(sub, format, dst, dstlen)
const ip_subnet *sub;
int format;
char *dst;
size_t dstlen;
{
size_t len, alen;
char *end;
len = subnettot(sub, format, dst, dstlen);
/* if port is zero, then return */
if(portof(&sub->addr) == 0) {
return len;
}
/* else, append to the format, decimal representation */
alen = strlen(dst);
end = dst + alen;
if((alen + ULTOT_BUF) > dstlen) {
/* we failed to find enough space, let caller know */
return len + ULTOT_BUF;
}
/* base = 10 */
*end++ = ':';
len += ultoa(ntohs(portof(&sub->addr)), 10, end, dstlen-(alen+1));
return len;
}
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