URL https://opencores.org/ocsvn/openrisc_me/openrisc_me/trunk

Subversion Repositories openrisc_me

[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [net/] [bsd_tcpip/] [v2_0/] [include/] [netinet/] [ip6.h] - Blame information for rev 307

Go to most recent revision | Details | Compare with Previous | View Log


//==========================================================================
//
//      include/netinet/ip6.h
//
//==========================================================================
//####BSDCOPYRIGHTBEGIN####
//
// -------------------------------------------
//
// Portions of this software may have been derived from OpenBSD, 
// FreeBSD or other sources, and are covered by the appropriate
// copyright disclaimers included herein.
//
// Portions created by Red Hat are
// Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
//
// -------------------------------------------
//
//####BSDCOPYRIGHTEND####
//==========================================================================
 
/*      $KAME: ip6.h,v 1.25 2001/11/29 04:38:37 keiichi 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 */
} __attribute__ ((aligned(1), packed));
 
#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_int8_t ip6e_nxt;
        u_int8_t ip6e_len;
} __attribute__ ((aligned(1), packed));
 
/* 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 */
} __attribute__ ((aligned(1), packed));
 
/* 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 */
} __attribute__ ((aligned(1), packed));
 
/* 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;
} __attribute__ ((aligned(1), packed));
 
/* Jumbo Payload Option */
struct ip6_opt_jumbo {
        u_int8_t ip6oj_type;
        u_int8_t ip6oj_len;
        u_int8_t ip6oj_jumbo_len[4];
} __attribute__ ((aligned(1), packed));
#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 */
} __attribute__ ((aligned(1), packed));
 
/* Tunnel Limit Option */
struct ip6_opt_tunnel {
        u_int8_t ip6ot_type;
        u_int8_t ip6ot_len;
        u_int8_t ip6ot_encap_limit;
} __attribute__ ((aligned(1), packed));
 
/* Router Alert Option */
struct ip6_opt_router {
        u_int8_t ip6or_type;
        u_int8_t ip6or_len;
        u_int8_t ip6or_value[2];
} __attribute__ ((aligned(1), packed));
/* 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;
#ifdef MIP6_DRAFT13
        u_int8_t ip6ou_flags;
        u_int8_t ip6ou_prefixlen;
        u_int16_t ip6ou_seqno;
#else
        u_int8_t ip6ou_flags;
        u_int8_t ip6ou_reserved[2];
        u_int8_t ip6ou_seqno;
#endif /* MIP6_DRAFT13 */
        u_int8_t ip6ou_lifetime[4];
        /* followed by sub-options */
} __attribute__ ((aligned(1), packed));
 
/* Binding Update Flags */
#define IP6_BUF_ACK     0x80    /* Request a binding ack */
#define IP6_BUF_HOME    0x40    /* Home Registration */
#ifdef MIP6_DRAFT13
#define IP6_BUF_ROUTER  0x20    /* Sending mobile node is a router */
#else
#define IP6_BUF_SINGLE  0x20    /* Update the specified address only */
#endif /* MIP6_DRAFT13 */
#define IP6_BUF_DAD     0x10    /* Perform Duplicate Address Detection */
 
/* Binding Ack Option */
struct ip6_opt_binding_ack {
        u_int8_t ip6oa_type;
        u_int8_t ip6oa_len;
        u_int8_t ip6oa_status;
#ifdef MIP6_DRAFT13
        u_int16_t ip6oa_seqno;
#else
        u_int8_t ip6oa_reserved;
        u_int8_t ip6oa_seqno;
#endif /* MIP6_DRAFT13 */
        u_int8_t ip6oa_lifetime[4];
        u_int8_t ip6oa_refresh[4];
        /* followed by sub-options */
} __attribute__ ((aligned(1), packed));
 
/* Binding Request Option */
struct ip6_opt_binding_request {
        u_int8_t ip6or_type;
        u_int8_t ip6or_len;
        /* followed by sub-options */
} __attribute__ ((aligned(1), packed));
 
/* 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 */
} __attribute__ ((aligned(1), packed));
 
/* 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 */
} __attribute__ ((aligned(1), packed));
 
/* 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 */
} __attribute__ ((aligned(1), packed));
 
/* 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 */
} __attribute__ ((aligned(1), packed));
 
#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_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)
 
#ifdef PULLDOWN_STAT
#define IP6_EXTHDR_STAT(x)      x
#else
#define IP6_EXTHDR_STAT(x)
#endif
 
/*
 * 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;                                                        \
        IP6_EXTHDR_STAT(mbstat.m_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;                                                 \
        IP6_EXTHDR_STAT(mbstat.m_exthdrget0++);                         \
        if ((off) == 0 && (m)->m_len >= len)                             \
                (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_ */

Browse

Tools

Subversion Repositories openrisc_me

[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [net/] [bsd_tcpip/] [v2_0/] [include/] [netinet/] [ip6.h] - Blame information for rev 307

Line No.	Rev	Author	Line
1	27	unneback	`//==========================================================================`
2			`//`
3			`// include/netinet/ip6.h`
4			`//`
5			`//==========================================================================`
6			`//####BSDCOPYRIGHTBEGIN####`
7			`//`
8			`// -------------------------------------------`
9			`//`
10			`// Portions of this software may have been derived from OpenBSD,`
11			`// FreeBSD or other sources, and are covered by the appropriate`
12			`// copyright disclaimers included herein.`
13			`//`
14			`// Portions created by Red Hat are`
15			`// Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.`
16			`//`
17			`// -------------------------------------------`
18			`//`
19			`//####BSDCOPYRIGHTEND####`
20			`//==========================================================================`
21
22			`/* $KAME: ip6.h,v 1.25 2001/11/29 04:38:37 keiichi Exp $ */`
23
24			`/*`
25			`* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.`
26			`* All rights reserved.`
27			`*`
28			`* Redistribution and use in source and binary forms, with or without`
29			`* modification, are permitted provided that the following conditions`
30			`* are met:`
31			`* 1. Redistributions of source code must retain the above copyright`
32			`* notice, this list of conditions and the following disclaimer.`
33			`* 2. Redistributions in binary form must reproduce the above copyright`
34			`* notice, this list of conditions and the following disclaimer in the`
35			`* documentation and/or other materials provided with the distribution.`
36			`* 3. Neither the name of the project nor the names of its contributors`
37			`* may be used to endorse or promote products derived from this software`
38			`* without specific prior written permission.`
39			`*`
40			* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
41			`* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE`
42			`* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE`
43			`* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE`
44			`* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL`
45			`* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS`
46			`* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)`
47			`* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT`
48			`* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY`
49			`* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF`
50			`* SUCH DAMAGE.`
51			`*/`
52
53			`/*`
54			`* Copyright (c) 1982, 1986, 1993`
55			`* The Regents of the University of California. All rights reserved.`
56			`*`
57			`* Redistribution and use in source and binary forms, with or without`
58			`* modification, are permitted provided that the following conditions`
59			`* are met:`
60			`* 1. Redistributions of source code must retain the above copyright`
61			`* notice, this list of conditions and the following disclaimer.`
62			`* 2. Redistributions in binary form must reproduce the above copyright`
63			`* notice, this list of conditions and the following disclaimer in the`
64			`* documentation and/or other materials provided with the distribution.`
65			`* 3. All advertising materials mentioning features or use of this software`
66			`* must display the following acknowledgement:`
67			`* This product includes software developed by the University of`
68			`* California, Berkeley and its contributors.`
69			`* 4. Neither the name of the University nor the names of its contributors`
70			`* may be used to endorse or promote products derived from this software`
71			`* without specific prior written permission.`
72			`*`
73			* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
74			`* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE`
75			`* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE`
76			`* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE`
77			`* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL`
78			`* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS`
79			`* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)`
80			`* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT`
81			`* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY`
82			`* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF`
83			`* SUCH DAMAGE.`
84			`*`
85			`* @(#)ip.h 8.1 (Berkeley) 6/10/93`
86			`*/`
87
88			`#ifndef _NETINET_IP6_H_`
89			`#define _NETINET_IP6_H_`
90
91			`/*`
92			`* Definition for internet protocol version 6.`
93			`* RFC 2460`
94			`*/`
95
96			`struct ip6_hdr {`
97			`union {`
98			`struct ip6_hdrctl {`
99			`u_int32_t ip6_un1_flow; /* 20 bits of flow-ID */`
100			`u_int16_t ip6_un1_plen; /* payload length */`
101			`u_int8_t ip6_un1_nxt; /* next header */`
102			`u_int8_t ip6_un1_hlim; /* hop limit */`
103			`} ip6_un1;`
104			`u_int8_t ip6_un2_vfc; /* 4 bits version, top 4 bits class */`
105			`} ip6_ctlun;`
106			`struct in6_addr ip6_src; /* source address */`
107			`struct in6_addr ip6_dst; /* destination address */`
108			`} __attribute__ ((aligned(1), packed));`
109
110			`#define ip6_vfc ip6_ctlun.ip6_un2_vfc`
111			`#define ip6_flow ip6_ctlun.ip6_un1.ip6_un1_flow`
112			`#define ip6_plen ip6_ctlun.ip6_un1.ip6_un1_plen`
113			`#define ip6_nxt ip6_ctlun.ip6_un1.ip6_un1_nxt`
114			`#define ip6_hlim ip6_ctlun.ip6_un1.ip6_un1_hlim`
115			`#define ip6_hops ip6_ctlun.ip6_un1.ip6_un1_hlim`
116
117			`#define IPV6_VERSION 0x60`
118			`#define IPV6_VERSION_MASK 0xf0`
119
120			`#if BYTE_ORDER == BIG_ENDIAN`
121			`#define IPV6_FLOWINFO_MASK 0x0fffffff /* flow info (28 bits) */`
122			`#define IPV6_FLOWLABEL_MASK 0x000fffff /* flow label (20 bits) */`
123			`#else`
124			`#if BYTE_ORDER == LITTLE_ENDIAN`
125			`#define IPV6_FLOWINFO_MASK 0xffffff0f /* flow info (28 bits) */`
126			`#define IPV6_FLOWLABEL_MASK 0xffff0f00 /* flow label (20 bits) */`
127			`#endif /* LITTLE_ENDIAN */`
128			`#endif`
129			`#if 1`
130			`/* ECN bits proposed by Sally Floyd */`
131			`#define IP6TOS_CE 0x01 /* congestion experienced */`
132			`#define IP6TOS_ECT 0x02 /* ECN-capable transport */`
133			`#endif`
134
135			`/*`
136			`* Extension Headers`
137			`*/`
138
139			`struct ip6_ext {`
140			`u_int8_t ip6e_nxt;`
141			`u_int8_t ip6e_len;`
142			`} __attribute__ ((aligned(1), packed));`
143
144			`/* Hop-by-Hop options header */`
145			`/* XXX should we pad it to force alignment on an 8-byte boundary? */`
146			`struct ip6_hbh {`
147			`u_int8_t ip6h_nxt; /* next header */`
148			`u_int8_t ip6h_len; /* length in units of 8 octets */`
149			`/* followed by options */`
150			`} __attribute__ ((aligned(1), packed));`
151
152			`/* Destination options header */`
153			`/* XXX should we pad it to force alignment on an 8-byte boundary? */`
154			`struct ip6_dest {`
155			`u_int8_t ip6d_nxt; /* next header */`
156			`u_int8_t ip6d_len; /* length in units of 8 octets */`
157			`/* followed by options */`
158			`} __attribute__ ((aligned(1), packed));`
159
160			`/* Option types and related macros */`
161			`#define IP6OPT_PAD1 0x00 /* 00 0 00000 */`
162			`#define IP6OPT_PADN 0x01 /* 00 0 00001 */`
163			`#define IP6OPT_JUMBO 0xC2 /* 11 0 00010 = 194 */`
164			`#define IP6OPT_NSAP_ADDR 0xC3 /* 11 0 00011 */`
165			`#define IP6OPT_TUNNEL_LIMIT 0x04 /* 00 0 00100 */`
166			`#define IP6OPT_RTALERT 0x05 /* 00 0 00101 (KAME definition) */`
167			`#define IP6OPT_ROUTER_ALERT 0x05 /* (2292bis def, recommended) */`
168
169			`#define IP6OPT_RTALERT_LEN 4`
170			`#define IP6OPT_RTALERT_MLD 0 /* Datagram contains an MLD message */`
171			`#define IP6OPT_RTALERT_RSVP 1 /* Datagram contains an RSVP message */`
172			`#define IP6OPT_RTALERT_ACTNET 2 /* contains an Active Networks msg */`
173			`#define IP6OPT_MINLEN 2`
174
175			`#define IP6OPT_BINDING_UPDATE 0xc6 /* 11 0 00110 */`
176			`#define IP6OPT_BINDING_ACK 0x07 /* 00 0 00111 */`
177			`#define IP6OPT_BINDING_REQ 0x08 /* 00 0 01000 */`
178			`#define IP6OPT_HOME_ADDRESS 0xc9 /* 11 0 01001 */`
179			`#define IP6OPT_EID 0x8a /* 10 0 01010 */`
180
181			`#define IP6OPT_TYPE(o) ((o) & 0xC0)`
182			`#define IP6OPT_TYPE_SKIP 0x00`
183			`#define IP6OPT_TYPE_DISCARD 0x40`
184			`#define IP6OPT_TYPE_FORCEICMP 0x80`
185			`#define IP6OPT_TYPE_ICMP 0xC0`
186
187			`#define IP6OPT_MUTABLE 0x20`
188
189			`/* IPv6 options: common part */`
190			`struct ip6_opt {`
191			`u_int8_t ip6o_type;`
192			`u_int8_t ip6o_len;`
193			`} __attribute__ ((aligned(1), packed));`
194
195			`/* Jumbo Payload Option */`
196			`struct ip6_opt_jumbo {`
197			`u_int8_t ip6oj_type;`
198			`u_int8_t ip6oj_len;`
199			`u_int8_t ip6oj_jumbo_len[4];`
200			`} __attribute__ ((aligned(1), packed));`
201			`#define IP6OPT_JUMBO_LEN 6`
202
203			`/* NSAP Address Option */`
204			`struct ip6_opt_nsap {`
205			`u_int8_t ip6on_type;`
206			`u_int8_t ip6on_len;`
207			`u_int8_t ip6on_src_nsap_len;`
208			`u_int8_t ip6on_dst_nsap_len;`
209			`/* followed by source NSAP */`
210			`/* followed by destination NSAP */`
211			`} __attribute__ ((aligned(1), packed));`
212
213			`/* Tunnel Limit Option */`
214			`struct ip6_opt_tunnel {`
215			`u_int8_t ip6ot_type;`
216			`u_int8_t ip6ot_len;`
217			`u_int8_t ip6ot_encap_limit;`
218			`} __attribute__ ((aligned(1), packed));`
219
220			`/* Router Alert Option */`
221			`struct ip6_opt_router {`
222			`u_int8_t ip6or_type;`
223			`u_int8_t ip6or_len;`
224			`u_int8_t ip6or_value[2];`
225			`} __attribute__ ((aligned(1), packed));`
226			`/* Router alert values (in network byte order) */`
227			`#if BYTE_ORDER == BIG_ENDIAN`
228			`#define IP6_ALERT_MLD 0x0000`
229			`#define IP6_ALERT_RSVP 0x0001`
230			`#define IP6_ALERT_AN 0x0002`
231			`#else`
232			`#if BYTE_ORDER == LITTLE_ENDIAN`
233			`#define IP6_ALERT_MLD 0x0000`
234			`#define IP6_ALERT_RSVP 0x0100`
235			`#define IP6_ALERT_AN 0x0200`
236			`#endif /* LITTLE_ENDIAN */`
237			`#endif`
238
239			`/* Binding Update Option */`
240			`struct ip6_opt_binding_update {`
241			`u_int8_t ip6ou_type;`
242			`u_int8_t ip6ou_len;`
243			`#ifdef MIP6_DRAFT13`
244			`u_int8_t ip6ou_flags;`
245			`u_int8_t ip6ou_prefixlen;`
246			`u_int16_t ip6ou_seqno;`
247			`#else`
248			`u_int8_t ip6ou_flags;`
249			`u_int8_t ip6ou_reserved[2];`
250			`u_int8_t ip6ou_seqno;`
251			`#endif /* MIP6_DRAFT13 */`
252			`u_int8_t ip6ou_lifetime[4];`
253			`/* followed by sub-options */`
254			`} __attribute__ ((aligned(1), packed));`
255
256			`/* Binding Update Flags */`
257			`#define IP6_BUF_ACK 0x80 /* Request a binding ack */`
258			`#define IP6_BUF_HOME 0x40 /* Home Registration */`
259			`#ifdef MIP6_DRAFT13`
260			`#define IP6_BUF_ROUTER 0x20 /* Sending mobile node is a router */`
261			`#else`
262			`#define IP6_BUF_SINGLE 0x20 /* Update the specified address only */`
263			`#endif /* MIP6_DRAFT13 */`
264			`#define IP6_BUF_DAD 0x10 /* Perform Duplicate Address Detection */`
265
266			`/* Binding Ack Option */`
267			`struct ip6_opt_binding_ack {`
268			`u_int8_t ip6oa_type;`
269			`u_int8_t ip6oa_len;`
270			`u_int8_t ip6oa_status;`
271			`#ifdef MIP6_DRAFT13`
272			`u_int16_t ip6oa_seqno;`
273			`#else`
274			`u_int8_t ip6oa_reserved;`
275			`u_int8_t ip6oa_seqno;`
276			`#endif /* MIP6_DRAFT13 */`
277			`u_int8_t ip6oa_lifetime[4];`
278			`u_int8_t ip6oa_refresh[4];`
279			`/* followed by sub-options */`
280			`} __attribute__ ((aligned(1), packed));`
281
282			`/* Binding Request Option */`
283			`struct ip6_opt_binding_request {`
284			`u_int8_t ip6or_type;`
285			`u_int8_t ip6or_len;`
286			`/* followed by sub-options */`
287			`} __attribute__ ((aligned(1), packed));`
288
289			`/* Home Address Option */`
290			`struct ip6_opt_home_address {`
291			`u_int8_t ip6oh_type;`
292			`u_int8_t ip6oh_len;`
293			`u_int8_t ip6oh_addr[16];/* Home Address */`
294			`/* followed by sub-options */`
295			`} __attribute__ ((aligned(1), packed));`
296
297			`/* Routing header */`
298			`struct ip6_rthdr {`
299			`u_int8_t ip6r_nxt; /* next header */`
300			`u_int8_t ip6r_len; /* length in units of 8 octets */`
301			`u_int8_t ip6r_type; /* routing type */`
302			`u_int8_t ip6r_segleft; /* segments left */`
303			`/* followed by routing type specific data */`
304			`} __attribute__ ((aligned(1), packed));`
305
306			`/* Type 0 Routing header */`
307			`struct ip6_rthdr0 {`
308			`u_int8_t ip6r0_nxt; /* next header */`
309			`u_int8_t ip6r0_len; /* length in units of 8 octets */`
310			`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_ */`