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/*
* extract parts of an ip_address
* 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: addrtypeof.c,v 1.10 2004/07/10 07:43:47 mcr Exp $
*/
#include "openswan.h"
/*
- addrtypeof - get the type of an ip_address
*/
int
addrtypeof(src)
const ip_address *src;
{
return src->u.v4.sin_family;
}
/*
- addrbytesptr - get pointer to the address bytes of an ip_address
*/
size_t /* 0 for error */
addrbytesptr(src, dstp)
const ip_address *src;
const unsigned char **dstp; /* NULL means just a size query */
{
const unsigned char *p;
size_t n;
switch (src->u.v4.sin_family) {
case AF_INET:
p = (const unsigned char *)&src->u.v4.sin_addr.s_addr;
n = 4;
break;
case AF_INET6:
p = (const unsigned char *)&src->u.v6.sin6_addr;
n = 16;
break;
default:
return 0;
break;
}
if (dstp != NULL)
*dstp = p;
return n;
}
/*
- addrlenof - get length of the address bytes of an ip_address
*/
size_t /* 0 for error */
addrlenof(src)
const ip_address *src;
{
return addrbytesptr(src, NULL);
}
/*
- addrbytesof - get the address bytes of an ip_address
*/
size_t /* 0 for error */
addrbytesof(src, dst, dstlen)
const ip_address *src;
unsigned char *dst;
size_t dstlen;
{
const unsigned char *p;
size_t n;
size_t ncopy;
n = addrbytesptr(src, &p);
if (n == 0)
return 0;
if (dstlen > 0) {
ncopy = n;
if (ncopy > dstlen)
ncopy = dstlen;
memcpy(dst, p, ncopy);
}
return n;
}
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