Home | History | Annotate | Line # | Download | only in net
inet6_scopeid.c revision 1.2.8.2 
      1  1.2.8.2  tls /*-
      2  1.2.8.2  tls  * Copyright (c) 2003 The NetBSD Foundation, Inc.
      3  1.2.8.2  tls  * All rights reserved.
      4  1.2.8.2  tls  *
      5  1.2.8.2  tls  * This code is derived from software contributed to The NetBSD Foundation
      6  1.2.8.2  tls  * by Christos Zoulas.
      7  1.2.8.2  tls  *
      8  1.2.8.2  tls  * Redistribution and use in source and binary forms, with or without
      9  1.2.8.2  tls  * modification, are permitted provided that the following conditions
     10  1.2.8.2  tls  * are met:
     11  1.2.8.2  tls  * 1. Redistributions of source code must retain the above copyright
     12  1.2.8.2  tls  *    notice, this list of conditions and the following disclaimer.
     13  1.2.8.2  tls  * 2. Redistributions in binary form must reproduce the above copyright
     14  1.2.8.2  tls  *    notice, this list of conditions and the following disclaimer in the
     15  1.2.8.2  tls  *    documentation and/or other materials provided with the distribution.
     16  1.2.8.2  tls  * 3. All advertising materials mentioning features or use of this software
     17  1.2.8.2  tls  *    must display the following acknowledgement:
     18  1.2.8.2  tls  *        This product includes software developed by the NetBSD
     19  1.2.8.2  tls  *        Foundation, Inc. and its contributors.
     20  1.2.8.2  tls  * 4. Neither the name of The NetBSD Foundation nor the names of its
     21  1.2.8.2  tls  *    contributors may be used to endorse or promote products derived
     22  1.2.8.2  tls  *    from this software without specific prior written permission.
     23  1.2.8.2  tls  *
     24  1.2.8.2  tls  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     25  1.2.8.2  tls  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     26  1.2.8.2  tls  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     27  1.2.8.2  tls  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     28  1.2.8.2  tls  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     29  1.2.8.2  tls  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     30  1.2.8.2  tls  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     31  1.2.8.2  tls  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     32  1.2.8.2  tls  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     33  1.2.8.2  tls  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     34  1.2.8.2  tls  * POSSIBILITY OF SUCH DAMAGE.
     35  1.2.8.2  tls  */
     36  1.2.8.2  tls #include <sys/cdefs.h>
     37  1.2.8.2  tls __RCSID("$NetBSD: inet6_scopeid.c,v 1.2.8.2 2014/08/20 00:02:15 tls Exp $");
     38  1.2.8.2  tls 
     39  1.2.8.2  tls #include <sys/endian.h>
     40  1.2.8.2  tls #include <string.h>
     41  1.2.8.2  tls #include <stdint.h>
     42  1.2.8.2  tls #include <netinet/in.h>
     43  1.2.8.2  tls #include <netinet6/in6.h>
     44  1.2.8.2  tls 
     45  1.2.8.2  tls /* KAME idiosyncrasy */
     46  1.2.8.2  tls void
     47  1.2.8.2  tls inet6_getscopeid(struct sockaddr_in6 *sin6, int flags)
     48  1.2.8.2  tls {
     49  1.2.8.2  tls #if defined(__KAME__)
     50  1.2.8.2  tls 	if ((IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
     51  1.2.8.2  tls 	    (flags & INET6_IS_ADDR_LINKLOCAL)) ||
     52  1.2.8.2  tls 	    (IN6_IS_ADDR_MC_LINKLOCAL(&sin6->sin6_addr) &&
     53  1.2.8.2  tls 	    (flags & INET6_IS_ADDR_MC_LINKLOCAL)) ||
     54  1.2.8.2  tls 	    (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
     55  1.2.8.2  tls 	    (flags & INET6_IS_ADDR_SITELOCAL))) {
     56  1.2.8.2  tls 		uint16_t scope;
     57  1.2.8.2  tls 		memcpy(&scope, &sin6->sin6_addr.s6_addr[2], sizeof(scope));
     58  1.2.8.2  tls 		sin6->sin6_scope_id = ntohs(scope);
     59  1.2.8.2  tls 		sin6->sin6_addr.s6_addr[2] = sin6->sin6_addr.s6_addr[3] = 0;
     60  1.2.8.2  tls 	}
     61  1.2.8.2  tls #endif
     62  1.2.8.2  tls }
     63  1.2.8.2  tls 
     64  1.2.8.2  tls void
     65  1.2.8.2  tls inet6_putscopeid(struct sockaddr_in6 *sin6, int flags)
     66  1.2.8.2  tls {
     67  1.2.8.2  tls #if defined(__KAME__)
     68  1.2.8.2  tls 	if ((IN6_IS_ADDR_LINKLOCAL(&sin6->sin6_addr) &&
     69  1.2.8.2  tls 	    (flags & INET6_IS_ADDR_LINKLOCAL)) ||
     70  1.2.8.2  tls 	    (IN6_IS_ADDR_MC_LINKLOCAL(&sin6->sin6_addr) &&
     71  1.2.8.2  tls 	    (flags & INET6_IS_ADDR_MC_LINKLOCAL)) ||
     72  1.2.8.2  tls 	    (IN6_IS_ADDR_SITELOCAL(&sin6->sin6_addr) &&
     73  1.2.8.2  tls 	    (flags & INET6_IS_ADDR_SITELOCAL))) {
     74  1.2.8.2  tls 	    uint16_t scope = htons(sin6->sin6_scope_id);
     75  1.2.8.2  tls 		memcpy(&sin6->sin6_addr.s6_addr[2], &scope, sizeof(scope));
     76  1.2.8.2  tls 		sin6->sin6_scope_id = 0;
     77  1.2.8.2  tls 	}
     78  1.2.8.2  tls #endif
     79  1.2.8.2  tls }
     80