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/*-
* Copyright (c) 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__RCSID("$NetBSD: inet6_scopeid.c,v 1.2 2013/10/19 15:47:02 christos Exp $");
#include <sys/endian.h>
#include <string.h>
#include <stdint.h>
#include <netinet/in.h>
#include <netinet6/in6.h>
/* KAME idiosyncrasy */
void
inet6_getscopeid(struct sockaddr_in6 *sin6, int flags)
{
#if defined(__KAME__)
if ((IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
(flags & INET6_IS_ADDR_LINKLOCAL)) ||
(IN6_IS_ADDR_MC_LINKLOCAL(&sin6->sin6_addr) &&
(flags & INET6_IS_ADDR_MC_LINKLOCAL)) ||
(IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
(flags & INET6_IS_ADDR_SITELOCAL))) {
uint16_t scope;
memcpy(&scope, &sin6->sin6_addr.s6_addr[2], sizeof(scope));
sin6->sin6_scope_id = ntohs(scope);
sin6->sin6_addr.s6_addr[2] = sin6->sin6_addr.s6_addr[3] = 0;
}
#endif
}
void
inet6_putscopeid(struct sockaddr_in6 *sin6, int flags)
{
#if defined(__KAME__)
if ((IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
(flags & INET6_IS_ADDR_LINKLOCAL)) ||
(IN6_IS_ADDR_MC_LINKLOCAL(&sin6->sin6_addr) &&
(flags & INET6_IS_ADDR_MC_LINKLOCAL)) ||
(IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
(flags & INET6_IS_ADDR_SITELOCAL))) {
uint16_t scope = htons(sin6->sin6_scope_id);
memcpy(&sin6->sin6_addr.s6_addr[2], &scope, sizeof(scope));
sin6->sin6_scope_id = 0;
}
#endif
}
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