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//==========================================================================
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//
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// include/netinet/ip6.h
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//
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//==========================================================================
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//####BSDCOPYRIGHTBEGIN####
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//
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// -------------------------------------------
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//
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// Portions of this software may have been derived from OpenBSD,
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// FreeBSD or other sources, and are covered by the appropriate
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// copyright disclaimers included herein.
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//
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// Portions created by Red Hat are
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// Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
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//
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// -------------------------------------------
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//
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//####BSDCOPYRIGHTEND####
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//==========================================================================
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/* $KAME: ip6.h,v 1.25 2001/11/29 04:38:37 keiichi Exp $ */
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/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)ip.h 8.1 (Berkeley) 6/10/93
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*/
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#ifndef _NETINET_IP6_H_
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#define _NETINET_IP6_H_
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/*
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* Definition for internet protocol version 6.
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* RFC 2460
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*/
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struct ip6_hdr {
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union {
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struct ip6_hdrctl {
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u_int32_t ip6_un1_flow; /* 20 bits of flow-ID */
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u_int16_t ip6_un1_plen; /* payload length */
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u_int8_t ip6_un1_nxt; /* next header */
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u_int8_t ip6_un1_hlim; /* hop limit */
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} ip6_un1;
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u_int8_t ip6_un2_vfc; /* 4 bits version, top 4 bits class */
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} ip6_ctlun;
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struct in6_addr ip6_src; /* source address */
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struct in6_addr ip6_dst; /* destination address */
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} __attribute__ ((aligned(1), packed));
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#define ip6_vfc ip6_ctlun.ip6_un2_vfc
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#define ip6_flow ip6_ctlun.ip6_un1.ip6_un1_flow
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#define ip6_plen ip6_ctlun.ip6_un1.ip6_un1_plen
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#define ip6_nxt ip6_ctlun.ip6_un1.ip6_un1_nxt
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#define ip6_hlim ip6_ctlun.ip6_un1.ip6_un1_hlim
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#define ip6_hops ip6_ctlun.ip6_un1.ip6_un1_hlim
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#define IPV6_VERSION 0x60
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#define IPV6_VERSION_MASK 0xf0
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#if BYTE_ORDER == BIG_ENDIAN
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#define IPV6_FLOWINFO_MASK 0x0fffffff /* flow info (28 bits) */
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#define IPV6_FLOWLABEL_MASK 0x000fffff /* flow label (20 bits) */
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#else
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#if BYTE_ORDER == LITTLE_ENDIAN
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#define IPV6_FLOWINFO_MASK 0xffffff0f /* flow info (28 bits) */
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#define IPV6_FLOWLABEL_MASK 0xffff0f00 /* flow label (20 bits) */
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#endif /* LITTLE_ENDIAN */
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#endif
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#if 1
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/* ECN bits proposed by Sally Floyd */
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#define IP6TOS_CE 0x01 /* congestion experienced */
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#define IP6TOS_ECT 0x02 /* ECN-capable transport */
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#endif
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/*
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* Extension Headers
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*/
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struct ip6_ext {
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u_int8_t ip6e_nxt;
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u_int8_t ip6e_len;
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} __attribute__ ((aligned(1), packed));
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/* Hop-by-Hop options header */
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/* XXX should we pad it to force alignment on an 8-byte boundary? */
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struct ip6_hbh {
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u_int8_t ip6h_nxt; /* next header */
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u_int8_t ip6h_len; /* length in units of 8 octets */
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/* followed by options */
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} __attribute__ ((aligned(1), packed));
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/* Destination options header */
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/* XXX should we pad it to force alignment on an 8-byte boundary? */
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struct ip6_dest {
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u_int8_t ip6d_nxt; /* next header */
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u_int8_t ip6d_len; /* length in units of 8 octets */
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/* followed by options */
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} __attribute__ ((aligned(1), packed));
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/* Option types and related macros */
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#define IP6OPT_PAD1 0x00 /* 00 0 00000 */
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#define IP6OPT_PADN 0x01 /* 00 0 00001 */
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#define IP6OPT_JUMBO 0xC2 /* 11 0 00010 = 194 */
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#define IP6OPT_NSAP_ADDR 0xC3 /* 11 0 00011 */
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#define IP6OPT_TUNNEL_LIMIT 0x04 /* 00 0 00100 */
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#define IP6OPT_RTALERT 0x05 /* 00 0 00101 (KAME definition) */
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#define IP6OPT_ROUTER_ALERT 0x05 /* (2292bis def, recommended) */
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#define IP6OPT_RTALERT_LEN 4
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#define IP6OPT_RTALERT_MLD 0 /* Datagram contains an MLD message */
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#define IP6OPT_RTALERT_RSVP 1 /* Datagram contains an RSVP message */
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#define IP6OPT_RTALERT_ACTNET 2 /* contains an Active Networks msg */
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#define IP6OPT_MINLEN 2
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#define IP6OPT_BINDING_UPDATE 0xc6 /* 11 0 00110 */
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#define IP6OPT_BINDING_ACK 0x07 /* 00 0 00111 */
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#define IP6OPT_BINDING_REQ 0x08 /* 00 0 01000 */
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#define IP6OPT_HOME_ADDRESS 0xc9 /* 11 0 01001 */
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#define IP6OPT_EID 0x8a /* 10 0 01010 */
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#define IP6OPT_TYPE(o) ((o) & 0xC0)
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#define IP6OPT_TYPE_SKIP 0x00
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#define IP6OPT_TYPE_DISCARD 0x40
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#define IP6OPT_TYPE_FORCEICMP 0x80
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#define IP6OPT_TYPE_ICMP 0xC0
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#define IP6OPT_MUTABLE 0x20
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/* IPv6 options: common part */
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struct ip6_opt {
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u_int8_t ip6o_type;
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u_int8_t ip6o_len;
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} __attribute__ ((aligned(1), packed));
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/* Jumbo Payload Option */
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struct ip6_opt_jumbo {
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u_int8_t ip6oj_type;
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u_int8_t ip6oj_len;
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u_int8_t ip6oj_jumbo_len[4];
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} __attribute__ ((aligned(1), packed));
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#define IP6OPT_JUMBO_LEN 6
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/* NSAP Address Option */
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struct ip6_opt_nsap {
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u_int8_t ip6on_type;
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u_int8_t ip6on_len;
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u_int8_t ip6on_src_nsap_len;
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u_int8_t ip6on_dst_nsap_len;
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/* followed by source NSAP */
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/* followed by destination NSAP */
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} __attribute__ ((aligned(1), packed));
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/* Tunnel Limit Option */
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struct ip6_opt_tunnel {
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u_int8_t ip6ot_type;
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u_int8_t ip6ot_len;
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u_int8_t ip6ot_encap_limit;
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} __attribute__ ((aligned(1), packed));
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/* Router Alert Option */
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struct ip6_opt_router {
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u_int8_t ip6or_type;
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u_int8_t ip6or_len;
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u_int8_t ip6or_value[2];
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} __attribute__ ((aligned(1), packed));
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/* Router alert values (in network byte order) */
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#if BYTE_ORDER == BIG_ENDIAN
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#define IP6_ALERT_MLD 0x0000
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#define IP6_ALERT_RSVP 0x0001
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#define IP6_ALERT_AN 0x0002
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#else
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#if BYTE_ORDER == LITTLE_ENDIAN
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#define IP6_ALERT_MLD 0x0000
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#define IP6_ALERT_RSVP 0x0100
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#define IP6_ALERT_AN 0x0200
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#endif /* LITTLE_ENDIAN */
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#endif
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/* Binding Update Option */
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struct ip6_opt_binding_update {
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u_int8_t ip6ou_type;
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u_int8_t ip6ou_len;
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#ifdef MIP6_DRAFT13
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u_int8_t ip6ou_flags;
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u_int8_t ip6ou_prefixlen;
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u_int16_t ip6ou_seqno;
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#else
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u_int8_t ip6ou_flags;
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u_int8_t ip6ou_reserved[2];
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u_int8_t ip6ou_seqno;
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#endif /* MIP6_DRAFT13 */
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u_int8_t ip6ou_lifetime[4];
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/* followed by sub-options */
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} __attribute__ ((aligned(1), packed));
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/* Binding Update Flags */
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#define IP6_BUF_ACK 0x80 /* Request a binding ack */
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#define IP6_BUF_HOME 0x40 /* Home Registration */
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#ifdef MIP6_DRAFT13
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#define IP6_BUF_ROUTER 0x20 /* Sending mobile node is a router */
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#else
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#define IP6_BUF_SINGLE 0x20 /* Update the specified address only */
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#endif /* MIP6_DRAFT13 */
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#define IP6_BUF_DAD 0x10 /* Perform Duplicate Address Detection */
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| 265 |
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/* Binding Ack Option */
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| 267 |
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struct ip6_opt_binding_ack {
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u_int8_t ip6oa_type;
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u_int8_t ip6oa_len;
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| 270 |
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u_int8_t ip6oa_status;
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| 271 |
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#ifdef MIP6_DRAFT13
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u_int16_t ip6oa_seqno;
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| 273 |
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#else
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| 274 |
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u_int8_t ip6oa_reserved;
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| 275 |
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u_int8_t ip6oa_seqno;
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| 276 |
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#endif /* MIP6_DRAFT13 */
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| 277 |
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u_int8_t ip6oa_lifetime[4];
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| 278 |
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u_int8_t ip6oa_refresh[4];
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| 279 |
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/* followed by sub-options */
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| 280 |
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} __attribute__ ((aligned(1), packed));
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| 281 |
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| 282 |
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/* Binding Request Option */
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| 283 |
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struct ip6_opt_binding_request {
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| 284 |
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u_int8_t ip6or_type;
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| 285 |
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u_int8_t ip6or_len;
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| 286 |
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/* followed by sub-options */
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| 287 |
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} __attribute__ ((aligned(1), packed));
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| 288 |
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| 289 |
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/* Home Address Option */
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| 290 |
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struct ip6_opt_home_address {
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| 291 |
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u_int8_t ip6oh_type;
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| 292 |
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u_int8_t ip6oh_len;
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| 293 |
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u_int8_t ip6oh_addr[16];/* Home Address */
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| 294 |
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/* followed by sub-options */
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| 295 |
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} __attribute__ ((aligned(1), packed));
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| 296 |
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| 297 |
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/* Routing header */
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| 298 |
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struct ip6_rthdr {
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| 299 |
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u_int8_t ip6r_nxt; /* next header */
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| 300 |
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u_int8_t ip6r_len; /* length in units of 8 octets */
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| 301 |
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u_int8_t ip6r_type; /* routing type */
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| 302 |
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u_int8_t ip6r_segleft; /* segments left */
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| 303 |
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/* followed by routing type specific data */
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| 304 |
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} __attribute__ ((aligned(1), packed));
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| 305 |
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| 306 |
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/* Type 0 Routing header */
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| 307 |
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struct ip6_rthdr0 {
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| 308 |
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u_int8_t ip6r0_nxt; /* next header */
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| 309 |
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u_int8_t ip6r0_len; /* length in units of 8 octets */
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| 310 |
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u_int8_t ip6r0_type; /* always zero */
|
| 311 |
|
|
u_int8_t ip6r0_segleft; /* segments left */
|
| 312 |
|
|
u_int32_t ip6r0_reserved; /* reserved field */
|
| 313 |
|
|
/* followed by up to 127 struct in6_addr */
|
| 314 |
|
|
} __attribute__ ((aligned(1), packed));
|
| 315 |
|
|
|
| 316 |
|
|
/* Fragment header */
|
| 317 |
|
|
struct ip6_frag {
|
| 318 |
|
|
u_int8_t ip6f_nxt; /* next header */
|
| 319 |
|
|
u_int8_t ip6f_reserved; /* reserved field */
|
| 320 |
|
|
u_int16_t ip6f_offlg; /* offset, reserved, and flag */
|
| 321 |
|
|
u_int32_t ip6f_ident; /* identification */
|
| 322 |
|
|
} __attribute__ ((aligned(1), packed));
|
| 323 |
|
|
|
| 324 |
|
|
#if BYTE_ORDER == BIG_ENDIAN
|
| 325 |
|
|
#define IP6F_OFF_MASK 0xfff8 /* mask out offset from _offlg */
|
| 326 |
|
|
#define IP6F_RESERVED_MASK 0x0006 /* reserved bits in ip6f_offlg */
|
| 327 |
|
|
#define IP6F_MORE_FRAG 0x0001 /* more-fragments flag */
|
| 328 |
|
|
#else /* BYTE_ORDER == LITTLE_ENDIAN */
|
| 329 |
|
|
#define IP6F_OFF_MASK 0xf8ff /* mask out offset from _offlg */
|
| 330 |
|
|
#define IP6F_RESERVED_MASK 0x0600 /* reserved bits in ip6f_offlg */
|
| 331 |
|
|
#define IP6F_MORE_FRAG 0x0100 /* more-fragments flag */
|
| 332 |
|
|
#endif /* BYTE_ORDER == LITTLE_ENDIAN */
|
| 333 |
|
|
|
| 334 |
|
|
/*
|
| 335 |
|
|
* Internet implementation parameters.
|
| 336 |
|
|
*/
|
| 337 |
|
|
#define IPV6_MAXHLIM 255 /* maximun hoplimit */
|
| 338 |
|
|
#define IPV6_DEFHLIM 64 /* default hlim */
|
| 339 |
|
|
#define IPV6_FRAGTTL 120 /* ttl for fragment packets, in slowtimo tick */
|
| 340 |
|
|
#define IPV6_HLIMDEC 1 /* subtracted when forwaeding */
|
| 341 |
|
|
|
| 342 |
|
|
#define IPV6_MMTU 1280 /* minimal MTU and reassembly. 1024 + 256 */
|
| 343 |
|
|
#define IPV6_MAXPACKET 65535 /* ip6 max packet size without Jumbo payload*/
|
| 344 |
|
|
|
| 345 |
|
|
#ifdef _KERNEL
|
| 346 |
|
|
/*
|
| 347 |
|
|
* IP6_EXTHDR_CHECK ensures that region between the IP6 header and the
|
| 348 |
|
|
* target header (including IPv6 itself, extension headers and
|
| 349 |
|
|
* TCP/UDP/ICMP6 headers) are continuous. KAME requires drivers
|
| 350 |
|
|
* to store incoming data into one internal mbuf or one or more external
|
| 351 |
|
|
* mbufs(never into two or more internal mbufs). Thus, the third case is
|
| 352 |
|
|
* supposed to never be matched but is prepared just in case.
|
| 353 |
|
|
*/
|
| 354 |
|
|
|
| 355 |
|
|
#define IP6_EXTHDR_CHECK(m, off, hlen, ret) \
|
| 356 |
|
|
do { \
|
| 357 |
|
|
if ((m)->m_next != NULL) { \
|
| 358 |
|
|
if ((m)->m_flags & M_EXT) { \
|
| 359 |
|
|
if ((m)->m_len < (off) + (hlen)) { \
|
| 360 |
|
|
ip6stat.ip6s_exthdrtoolong++; \
|
| 361 |
|
|
m_freem(m); \
|
| 362 |
|
|
return ret; \
|
| 363 |
|
|
} \
|
| 364 |
|
|
} else { \
|
| 365 |
|
|
if ((m)->m_len < (off) + (hlen)) { \
|
| 366 |
|
|
ip6stat.ip6s_exthdrtoolong++; \
|
| 367 |
|
|
m_freem(m); \
|
| 368 |
|
|
return ret; \
|
| 369 |
|
|
} \
|
| 370 |
|
|
} \
|
| 371 |
|
|
} else { \
|
| 372 |
|
|
if ((m)->m_len < (off) + (hlen)) { \
|
| 373 |
|
|
ip6stat.ip6s_tooshort++; \
|
| 374 |
|
|
in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated); \
|
| 375 |
|
|
m_freem(m); \
|
| 376 |
|
|
return ret; \
|
| 377 |
|
|
} \
|
| 378 |
|
|
} \
|
| 379 |
|
|
} while (0)
|
| 380 |
|
|
|
| 381 |
|
|
#ifdef PULLDOWN_STAT
|
| 382 |
|
|
#define IP6_EXTHDR_STAT(x) x
|
| 383 |
|
|
#else
|
| 384 |
|
|
#define IP6_EXTHDR_STAT(x)
|
| 385 |
|
|
#endif
|
| 386 |
|
|
|
| 387 |
|
|
/*
|
| 388 |
|
|
* IP6_EXTHDR_GET ensures that intermediate protocol header (from "off" to
|
| 389 |
|
|
* "len") is located in single mbuf, on contiguous memory region.
|
| 390 |
|
|
* The pointer to the region will be returned to pointer variable "val",
|
| 391 |
|
|
* with type "typ".
|
| 392 |
|
|
* IP6_EXTHDR_GET0 does the same, except that it aligns the structure at the
|
| 393 |
|
|
* very top of mbuf. GET0 is likely to make memory copy than GET.
|
| 394 |
|
|
*
|
| 395 |
|
|
* XXX we're now testing this, needs m_pulldown()
|
| 396 |
|
|
*/
|
| 397 |
|
|
#define IP6_EXTHDR_GET(val, typ, m, off, len) \
|
| 398 |
|
|
do { \
|
| 399 |
|
|
struct mbuf *t; \
|
| 400 |
|
|
int tmp; \
|
| 401 |
|
|
IP6_EXTHDR_STAT(mbstat.m_exthdrget++); \
|
| 402 |
|
|
if ((m)->m_len >= (off) + (len)) \
|
| 403 |
|
|
(val) = (typ)(mtod((m), caddr_t) + (off)); \
|
| 404 |
|
|
else { \
|
| 405 |
|
|
t = m_pulldown((m), (off), (len), &tmp); \
|
| 406 |
|
|
if (t) { \
|
| 407 |
|
|
if (t->m_len < tmp + (len)) \
|
| 408 |
|
|
panic("m_pulldown malfunction"); \
|
| 409 |
|
|
(val) = (typ)(mtod(t, caddr_t) + tmp); \
|
| 410 |
|
|
} else { \
|
| 411 |
|
|
(val) = (typ)NULL; \
|
| 412 |
|
|
(m) = NULL; \
|
| 413 |
|
|
} \
|
| 414 |
|
|
} \
|
| 415 |
|
|
} while (0)
|
| 416 |
|
|
|
| 417 |
|
|
#define IP6_EXTHDR_GET0(val, typ, m, off, len) \
|
| 418 |
|
|
do { \
|
| 419 |
|
|
struct mbuf *t; \
|
| 420 |
|
|
IP6_EXTHDR_STAT(mbstat.m_exthdrget0++); \
|
| 421 |
|
|
if ((off) == 0 && (m)->m_len >= len) \
|
| 422 |
|
|
(val) = (typ)mtod((m), caddr_t); \
|
| 423 |
|
|
else { \
|
| 424 |
|
|
t = m_pulldown((m), (off), (len), NULL); \
|
| 425 |
|
|
if (t) { \
|
| 426 |
|
|
if (t->m_len < (len)) \
|
| 427 |
|
|
panic("m_pulldown malfunction"); \
|
| 428 |
|
|
(val) = (typ)mtod(t, caddr_t); \
|
| 429 |
|
|
} else { \
|
| 430 |
|
|
(val) = (typ)NULL; \
|
| 431 |
|
|
(m) = NULL; \
|
| 432 |
|
|
} \
|
| 433 |
|
|
} \
|
| 434 |
|
|
} while (0)
|
| 435 |
|
|
#endif /*_KERNEL*/
|
| 436 |
|
|
|
| 437 |
|
|
#endif /* not _NETINET_IP6_H_ */
|
