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- /*
- * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * The contents of this file constitute Original Code as defined in and
- * are subject to the Apple Public Source License Version 1.1 (the
- * "License"). You may not use this file except in compliance with the
- * License. Please obtain a copy of the License at
- * http://www.apple.com/publicsource and read it before using this file.
- *
- * This Original Code and all software distributed under the License are
- * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
- * License for the specific language governing rights and limitations
- * under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
- /* $KAME: ip6.h,v 1.6 2000/02/26 12:53:07 jinmei Exp $ */
-
- /*
- * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
- * All rights reserved.
- *
- * 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. Neither the name of the project 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 PROJECT 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 PROJECT 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.
- */
-
- /*
- * Copyright (c) 1982, 1986, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * 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 University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
- *
- * @(#)ip.h 8.1 (Berkeley) 6/10/93
- */
-
- #ifndef _NETINET_IP6_H_
- #define _NETINET_IP6_H_
-
- /*
- * Definition for internet protocol version 6.
- * RFC 2460
- */
-
- struct ip6_hdr {
- union {
- struct ip6_hdrctl {
- u_int32_t ip6_un1_flow; /* 20 bits of flow-ID */
- u_int16_t ip6_un1_plen; /* payload length */
- u_int8_t ip6_un1_nxt; /* next header */
- u_int8_t ip6_un1_hlim; /* hop limit */
- } ip6_un1;
- u_int8_t ip6_un2_vfc; /* 4 bits version, top 4 bits class */
- } ip6_ctlun;
- struct in6_addr ip6_src; /* source address */
- struct in6_addr ip6_dst; /* destination address */
- };
-
- #define ip6_vfc ip6_ctlun.ip6_un2_vfc
- #define ip6_flow ip6_ctlun.ip6_un1.ip6_un1_flow
- #define ip6_plen ip6_ctlun.ip6_un1.ip6_un1_plen
- #define ip6_nxt ip6_ctlun.ip6_un1.ip6_un1_nxt
- #define ip6_hlim ip6_ctlun.ip6_un1.ip6_un1_hlim
- #define ip6_hops ip6_ctlun.ip6_un1.ip6_un1_hlim
-
- #define IPV6_VERSION 0x60
- #define IPV6_VERSION_MASK 0xf0
-
- #if BYTE_ORDER == BIG_ENDIAN
- #define IPV6_FLOWINFO_MASK 0x0fffffff /* flow info (28 bits) */
- #define IPV6_FLOWLABEL_MASK 0x000fffff /* flow label (20 bits) */
- #else
- #if BYTE_ORDER == LITTLE_ENDIAN
- #define IPV6_FLOWINFO_MASK 0xffffff0f /* flow info (28 bits) */
- #define IPV6_FLOWLABEL_MASK 0xffff0f00 /* flow label (20 bits) */
- #endif /* LITTLE_ENDIAN */
- #endif
- #if 1
- /* ECN bits proposed by Sally Floyd */
- #define IP6TOS_CE 0x01 /* congestion experienced */
- #define IP6TOS_ECT 0x02 /* ECN-capable transport */
- #endif
-
- /*
- * Extension Headers
- */
-
- struct ip6_ext {
- u_char ip6e_nxt;
- u_char ip6e_len;
- };
-
- /* Hop-by-Hop options header */
- /* XXX should we pad it to force alignment on an 8-byte boundary? */
- struct ip6_hbh {
- u_int8_t ip6h_nxt; /* next header */
- u_int8_t ip6h_len; /* length in units of 8 octets */
- /* followed by options */
- };
-
- /* Destination options header */
- /* XXX should we pad it to force alignment on an 8-byte boundary? */
- struct ip6_dest {
- u_int8_t ip6d_nxt; /* next header */
- u_int8_t ip6d_len; /* length in units of 8 octets */
- /* followed by options */
- };
-
- /* Option types and related macros */
- #define IP6OPT_PAD1 0x00 /* 00 0 00000 */
- #define IP6OPT_PADN 0x01 /* 00 0 00001 */
- #define IP6OPT_JUMBO 0xC2 /* 11 0 00010 = 194 */
- #define IP6OPT_NSAP_ADDR 0xC3 /* 11 0 00011 */
- #define IP6OPT_TUNNEL_LIMIT 0x04 /* 00 0 00100 */
- #define IP6OPT_RTALERT 0x05 /* 00 0 00101 (KAME definition) */
- #define IP6OPT_ROUTER_ALERT 0x05 /* (2292bis def, recommended) */
-
- #define IP6OPT_RTALERT_LEN 4
- #define IP6OPT_RTALERT_MLD 0 /* Datagram contains an MLD message */
- #define IP6OPT_RTALERT_RSVP 1 /* Datagram contains an RSVP message */
- #define IP6OPT_RTALERT_ACTNET 2 /* contains an Active Networks msg */
- #define IP6OPT_MINLEN 2
-
- #define IP6OPT_BINDING_UPDATE 0xc6 /* 11 0 00110 */
- #define IP6OPT_BINDING_ACK 0x07 /* 00 0 00111 */
- #define IP6OPT_BINDING_REQ 0x08 /* 00 0 01000 */
- #define IP6OPT_HOME_ADDRESS 0xc9 /* 11 0 01001 */
- #define IP6OPT_EID 0x8a /* 10 0 01010 */
-
- #define IP6OPT_TYPE(o) ((o) & 0xC0)
- #define IP6OPT_TYPE_SKIP 0x00
- #define IP6OPT_TYPE_DISCARD 0x40
- #define IP6OPT_TYPE_FORCEICMP 0x80
- #define IP6OPT_TYPE_ICMP 0xC0
-
- #define IP6OPT_MUTABLE 0x20
-
- /* IPv6 options: common part */
- struct ip6_opt {
- u_int8_t ip6o_type;
- u_int8_t ip6o_len;
- };
-
- /* Jumbo Payload Option */
- struct ip6_opt_jumbo {
- u_int8_t ip6oj_type;
- u_int8_t ip6oj_len;
- u_int8_t ip6oj_jumbo_len[4];
- };
- #define IP6OPT_JUMBO_LEN 6
-
- /* NSAP Address Option */
- struct ip6_opt_nsap {
- u_int8_t ip6on_type;
- u_int8_t ip6on_len;
- u_int8_t ip6on_src_nsap_len;
- u_int8_t ip6on_dst_nsap_len;
- /* followed by source NSAP */
- /* followed by destination NSAP */
- };
-
- /* Tunnel Limit Option */
- struct ip6_opt_tunnel {
- u_int8_t ip6ot_type;
- u_int8_t ip6ot_len;
- u_int8_t ip6ot_encap_limit;
- };
-
- /* Router Alert Option */
- struct ip6_opt_router {
- u_int8_t ip6or_type;
- u_int8_t ip6or_len;
- u_int8_t ip6or_value[2];
- };
- /* Router alert values (in network byte order) */
- #if BYTE_ORDER == BIG_ENDIAN
- #define IP6_ALERT_MLD 0x0000
- #define IP6_ALERT_RSVP 0x0001
- #define IP6_ALERT_AN 0x0002
- #else
- #if BYTE_ORDER == LITTLE_ENDIAN
- #define IP6_ALERT_MLD 0x0000
- #define IP6_ALERT_RSVP 0x0100
- #define IP6_ALERT_AN 0x0200
- #endif /* LITTLE_ENDIAN */
- #endif
-
- /* Binding Update Option */
- struct ip6_opt_binding_update {
- u_int8_t ip6ou_type;
- u_int8_t ip6ou_len;
- u_int8_t ip6ou_flags;
- u_int8_t ip6ou_prefixlen;
- u_int8_t ip6ou_seqno[2];
- u_int8_t ip6ou_lifetime[4];
- u_int8_t ip6ou_coa[16];/* Optional based on flags */
- /* followed by sub-options */
- };
-
- /* Binding Update Flags */
- #define IP6_BUF_ACK 0x80 /* Request a binding ack */
- #define IP6_BUF_HOME 0x40 /* Home Registration */
- #define IP6_BUF_COA 0x20 /* Care-of-address present in option */
- #define IP6_BUF_ROUTER 0x10 /* Sending mobile node is a router */
-
- /* Binding Ack Option */
- struct ip6_opt_binding_ack {
- u_int8_t ip6oa_type;
- u_int8_t ip6oa_len;
- u_int8_t ip6oa_status;
- u_int8_t ip6oa_seqno[2];
- u_int8_t ip6oa_lifetime[4];
- u_int8_t ip6oa_refresh[4];
- /* followed by sub-options */
- };
-
- /* Binding Request Option */
- struct ip6_opt_binding_request {
- u_int8_t ip6or_type;
- u_int8_t ip6or_len;
- /* followed by sub-options */
- };
-
- /* Home Address Option */
- struct ip6_opt_home_address {
- u_int8_t ip6oh_type;
- u_int8_t ip6oh_len;
- u_int8_t ip6oh_addr[16];/* Home Address */
- /* followed by sub-options */
- };
-
- /* Routing header */
- struct ip6_rthdr {
- u_int8_t ip6r_nxt; /* next header */
- u_int8_t ip6r_len; /* length in units of 8 octets */
- u_int8_t ip6r_type; /* routing type */
- u_int8_t ip6r_segleft; /* segments left */
- /* followed by routing type specific data */
- };
-
- /* Type 0 Routing header */
- struct ip6_rthdr0 {
- u_int8_t ip6r0_nxt; /* next header */
- u_int8_t ip6r0_len; /* length in units of 8 octets */
- u_int8_t ip6r0_type; /* always zero */
- u_int8_t ip6r0_segleft; /* segments left */
- u_int32_t ip6r0_reserved; /* reserved field */
- /* followed by up to 127 struct in6_addr */
-
- #ifdef COMPAT_RFC2292
- struct in6_addr ip6r0_addr[1]; /* up to 127 addresses */
- #endif
- };
-
- /* Fragment header */
- struct ip6_frag {
- u_int8_t ip6f_nxt; /* next header */
- u_int8_t ip6f_reserved; /* reserved field */
- u_int16_t ip6f_offlg; /* offset, reserved, and flag */
- u_int32_t ip6f_ident; /* identification */
- };
-
- #if BYTE_ORDER == BIG_ENDIAN
- #define IP6F_OFF_MASK 0xfff8 /* mask out offset from _offlg */
- #define IP6F_RESERVED_MASK 0x0006 /* reserved bits in ip6f_offlg */
- #define IP6F_MORE_FRAG 0x0001 /* more-fragments flag */
- #else /* BYTE_ORDER == LITTLE_ENDIAN */
- #define IP6F_OFF_MASK 0xf8ff /* mask out offset from _offlg */
- #define IP6F_RESERVED_MASK 0x0600 /* reserved bits in ip6f_offlg */
- #define IP6F_MORE_FRAG 0x0100 /* more-fragments flag */
- #endif /* BYTE_ORDER == LITTLE_ENDIAN */
-
- /*
- * Internet implementation parameters.
- */
- #define IPV6_MAXHLIM 255 /* maximun hoplimit */
- #define IPV6_DEFHLIM 64 /* default hlim */
- #define IPV6_FRAGTTL 120 /* ttl for fragment packets, in slowtimo tick */
- #define IPV6_HLIMDEC 1 /* subtracted when forwaeding */
-
- #define IPV6_MMTU 1280 /* minimal MTU and reassembly. 1024 + 256 */
- #define IPV6_MAXPACKET 65535 /* ip6 max packet size without Jumbo payload*/
-
- #ifdef KERNEL
- /*
- * IP6_EXTHDR_CHECK ensures that region between the IP6 header and the
- * target header (including IPv6 itself, extension headers and
- * TCP/UDP/ICMP6 headers) are continuous. KAME requires drivers
- * to store incoming data into one internal mbuf or one or more external
- * mbufs(never into two or more internal mbufs). Thus, the third case is
- * supposed to never be matched but is prepared just in case.
- */
-
- #define IP6_EXTHDR_CHECK(m, off, hlen, ret) \
- do { \
- if ((m)->m_next != NULL) { \
- if (((m)->m_flags & M_LOOP) && \
- ((m)->m_len < (off) + (hlen)) && \
- (((m) = m_pullup((m), (off) + (hlen))) == NULL)) { \
- ip6stat.ip6s_exthdrtoolong++; \
- return ret; \
- } else if ((m)->m_flags & M_EXT) { \
- if ((m)->m_len < (off) + (hlen)) { \
- ip6stat.ip6s_exthdrtoolong++; \
- m_freem(m); \
- return ret; \
- } \
- } else { \
- if ((m)->m_len < (off) + (hlen)) { \
- ip6stat.ip6s_exthdrtoolong++; \
- m_freem(m); \
- return ret; \
- } \
- } \
- } \
- else { \
- if ((m)->m_len < (off) + (hlen)) { \
- ip6stat.ip6s_tooshort++; \
- in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated); \
- m_freem(m); \
- return ret; \
- } \
- } \
- } while (0)
-
- /*
- * IP6_EXTHDR_GET ensures that intermediate protocol header (from "off" to
- * "len") is located in single mbuf, on contiguous memory region.
- * The pointer to the region will be returned to pointer variable "val",
- * with type "typ".
- * IP6_EXTHDR_GET0 does the same, except that it aligns the structure at the
- * very top of mbuf. GET0 is likely to make memory copy than GET.
- *
- * XXX we're now testing this, needs m_pulldown()
- */
- #define IP6_EXTHDR_GET(val, typ, m, off, len) \
- do { \
- struct mbuf *t; \
- int tmp; \
- ip6stat.ip6s_exthdrget++; \
- if ((m)->m_len >= (off) + (len)) \
- (val) = (typ)(mtod((m), caddr_t) + (off)); \
- else { \
- t = m_pulldown((m), (off), (len), &tmp); \
- if (t) { \
- if (t->m_len < tmp + (len)) \
- panic("m_pulldown malfunction"); \
- (val) = (typ)(mtod(t, caddr_t) + tmp); \
- } else { \
- (val) = (typ)NULL; \
- (m) = NULL; \
- } \
- } \
- } while (0)
-
- #define IP6_EXTHDR_GET0(val, typ, m, off, len) \
- do { \
- struct mbuf *t; \
- ip6stat.ip6s_exthdrget0++; \
- if ((off) == 0) \
- (val) = (typ)mtod(m, caddr_t); \
- else { \
- t = m_pulldown((m), (off), (len), NULL); \
- if (t) { \
- if (t->m_len < (len)) \
- panic("m_pulldown malfunction"); \
- (val) = (typ)mtod(t, caddr_t); \
- } else { \
- (val) = (typ)NULL; \
- (m) = NULL; \
- } \
- } \
- } while (0)
- #endif /*KERNEL*/
-
- #endif /* not _NETINET_IP6_H_ */
-