1686cdd19SJun-ichiro itojun Hagino /* $FreeBSD$ */ 233841545SHajimu UMEMOTO /* $KAME: ip6.h,v 1.18 2001/03/29 05:34:30 itojun Exp $ */ 3686cdd19SJun-ichiro itojun Hagino 4c398230bSWarner Losh /*- 5686cdd19SJun-ichiro itojun Hagino * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 682cd038dSYoshinobu Inoue * All rights reserved. 782cd038dSYoshinobu Inoue * 882cd038dSYoshinobu Inoue * Redistribution and use in source and binary forms, with or without 982cd038dSYoshinobu Inoue * modification, are permitted provided that the following conditions 1082cd038dSYoshinobu Inoue * are met: 1182cd038dSYoshinobu Inoue * 1. Redistributions of source code must retain the above copyright 1282cd038dSYoshinobu Inoue * notice, this list of conditions and the following disclaimer. 1382cd038dSYoshinobu Inoue * 2. Redistributions in binary form must reproduce the above copyright 1482cd038dSYoshinobu Inoue * notice, this list of conditions and the following disclaimer in the 1582cd038dSYoshinobu Inoue * documentation and/or other materials provided with the distribution. 1682cd038dSYoshinobu Inoue * 3. Neither the name of the project nor the names of its contributors 1782cd038dSYoshinobu Inoue * may be used to endorse or promote products derived from this software 1882cd038dSYoshinobu Inoue * without specific prior written permission. 1982cd038dSYoshinobu Inoue * 2082cd038dSYoshinobu Inoue * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 2182cd038dSYoshinobu Inoue * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2282cd038dSYoshinobu Inoue * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2382cd038dSYoshinobu Inoue * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 2482cd038dSYoshinobu Inoue * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2582cd038dSYoshinobu Inoue * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2682cd038dSYoshinobu Inoue * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2782cd038dSYoshinobu Inoue * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2882cd038dSYoshinobu Inoue * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2982cd038dSYoshinobu Inoue * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3082cd038dSYoshinobu Inoue * SUCH DAMAGE. 3182cd038dSYoshinobu Inoue */ 3282cd038dSYoshinobu Inoue 33c398230bSWarner Losh /*- 34686cdd19SJun-ichiro itojun Hagino * Copyright (c) 1982, 1986, 1993 35686cdd19SJun-ichiro itojun Hagino * The Regents of the University of California. All rights reserved. 36686cdd19SJun-ichiro itojun Hagino * 37686cdd19SJun-ichiro itojun Hagino * Redistribution and use in source and binary forms, with or without 38686cdd19SJun-ichiro itojun Hagino * modification, are permitted provided that the following conditions 39686cdd19SJun-ichiro itojun Hagino * are met: 40686cdd19SJun-ichiro itojun Hagino * 1. Redistributions of source code must retain the above copyright 41686cdd19SJun-ichiro itojun Hagino * notice, this list of conditions and the following disclaimer. 42686cdd19SJun-ichiro itojun Hagino * 2. Redistributions in binary form must reproduce the above copyright 43686cdd19SJun-ichiro itojun Hagino * notice, this list of conditions and the following disclaimer in the 44686cdd19SJun-ichiro itojun Hagino * documentation and/or other materials provided with the distribution. 45*fbbd9655SWarner Losh * 3. Neither the name of the University nor the names of its contributors 46686cdd19SJun-ichiro itojun Hagino * may be used to endorse or promote products derived from this software 47686cdd19SJun-ichiro itojun Hagino * without specific prior written permission. 48686cdd19SJun-ichiro itojun Hagino * 49686cdd19SJun-ichiro itojun Hagino * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 50686cdd19SJun-ichiro itojun Hagino * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 51686cdd19SJun-ichiro itojun Hagino * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 52686cdd19SJun-ichiro itojun Hagino * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 53686cdd19SJun-ichiro itojun Hagino * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 54686cdd19SJun-ichiro itojun Hagino * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 55686cdd19SJun-ichiro itojun Hagino * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 56686cdd19SJun-ichiro itojun Hagino * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 57686cdd19SJun-ichiro itojun Hagino * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 58686cdd19SJun-ichiro itojun Hagino * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 59686cdd19SJun-ichiro itojun Hagino * SUCH DAMAGE. 60686cdd19SJun-ichiro itojun Hagino * 61686cdd19SJun-ichiro itojun Hagino * @(#)ip.h 8.1 (Berkeley) 6/10/93 62686cdd19SJun-ichiro itojun Hagino */ 63686cdd19SJun-ichiro itojun Hagino 64686cdd19SJun-ichiro itojun Hagino #ifndef _NETINET_IP6_H_ 65686cdd19SJun-ichiro itojun Hagino #define _NETINET_IP6_H_ 66686cdd19SJun-ichiro itojun Hagino 67686cdd19SJun-ichiro itojun Hagino /* 68686cdd19SJun-ichiro itojun Hagino * Definition for internet protocol version 6. 69686cdd19SJun-ichiro itojun Hagino * RFC 2460 70686cdd19SJun-ichiro itojun Hagino */ 71686cdd19SJun-ichiro itojun Hagino 72686cdd19SJun-ichiro itojun Hagino struct ip6_hdr { 73686cdd19SJun-ichiro itojun Hagino union { 74686cdd19SJun-ichiro itojun Hagino struct ip6_hdrctl { 75686cdd19SJun-ichiro itojun Hagino u_int32_t ip6_un1_flow; /* 20 bits of flow-ID */ 76686cdd19SJun-ichiro itojun Hagino u_int16_t ip6_un1_plen; /* payload length */ 77686cdd19SJun-ichiro itojun Hagino u_int8_t ip6_un1_nxt; /* next header */ 78686cdd19SJun-ichiro itojun Hagino u_int8_t ip6_un1_hlim; /* hop limit */ 79686cdd19SJun-ichiro itojun Hagino } ip6_un1; 80686cdd19SJun-ichiro itojun Hagino u_int8_t ip6_un2_vfc; /* 4 bits version, top 4 bits class */ 81686cdd19SJun-ichiro itojun Hagino } ip6_ctlun; 82686cdd19SJun-ichiro itojun Hagino struct in6_addr ip6_src; /* source address */ 83686cdd19SJun-ichiro itojun Hagino struct in6_addr ip6_dst; /* destination address */ 84618d51bbSHajimu UMEMOTO } __packed; 85686cdd19SJun-ichiro itojun Hagino 86686cdd19SJun-ichiro itojun Hagino #define ip6_vfc ip6_ctlun.ip6_un2_vfc 87686cdd19SJun-ichiro itojun Hagino #define ip6_flow ip6_ctlun.ip6_un1.ip6_un1_flow 88686cdd19SJun-ichiro itojun Hagino #define ip6_plen ip6_ctlun.ip6_un1.ip6_un1_plen 89686cdd19SJun-ichiro itojun Hagino #define ip6_nxt ip6_ctlun.ip6_un1.ip6_un1_nxt 90686cdd19SJun-ichiro itojun Hagino #define ip6_hlim ip6_ctlun.ip6_un1.ip6_un1_hlim 91686cdd19SJun-ichiro itojun Hagino #define ip6_hops ip6_ctlun.ip6_un1.ip6_un1_hlim 92686cdd19SJun-ichiro itojun Hagino 93686cdd19SJun-ichiro itojun Hagino #define IPV6_VERSION 0x60 94686cdd19SJun-ichiro itojun Hagino #define IPV6_VERSION_MASK 0xf0 95686cdd19SJun-ichiro itojun Hagino 96686cdd19SJun-ichiro itojun Hagino #if BYTE_ORDER == BIG_ENDIAN 97686cdd19SJun-ichiro itojun Hagino #define IPV6_FLOWINFO_MASK 0x0fffffff /* flow info (28 bits) */ 98686cdd19SJun-ichiro itojun Hagino #define IPV6_FLOWLABEL_MASK 0x000fffff /* flow label (20 bits) */ 99686cdd19SJun-ichiro itojun Hagino #else 100686cdd19SJun-ichiro itojun Hagino #if BYTE_ORDER == LITTLE_ENDIAN 101686cdd19SJun-ichiro itojun Hagino #define IPV6_FLOWINFO_MASK 0xffffff0f /* flow info (28 bits) */ 102686cdd19SJun-ichiro itojun Hagino #define IPV6_FLOWLABEL_MASK 0xffff0f00 /* flow label (20 bits) */ 103686cdd19SJun-ichiro itojun Hagino #endif /* LITTLE_ENDIAN */ 104686cdd19SJun-ichiro itojun Hagino #endif 10533841545SHajimu UMEMOTO #if 1 106686cdd19SJun-ichiro itojun Hagino /* ECN bits proposed by Sally Floyd */ 107686cdd19SJun-ichiro itojun Hagino #define IP6TOS_CE 0x01 /* congestion experienced */ 108686cdd19SJun-ichiro itojun Hagino #define IP6TOS_ECT 0x02 /* ECN-capable transport */ 10933841545SHajimu UMEMOTO #endif 110686cdd19SJun-ichiro itojun Hagino 111686cdd19SJun-ichiro itojun Hagino /* 112686cdd19SJun-ichiro itojun Hagino * Extension Headers 113686cdd19SJun-ichiro itojun Hagino */ 114686cdd19SJun-ichiro itojun Hagino 115686cdd19SJun-ichiro itojun Hagino struct ip6_ext { 11633841545SHajimu UMEMOTO u_int8_t ip6e_nxt; 11733841545SHajimu UMEMOTO u_int8_t ip6e_len; 118618d51bbSHajimu UMEMOTO } __packed; 119686cdd19SJun-ichiro itojun Hagino 120686cdd19SJun-ichiro itojun Hagino /* Hop-by-Hop options header */ 121686cdd19SJun-ichiro itojun Hagino /* XXX should we pad it to force alignment on an 8-byte boundary? */ 122686cdd19SJun-ichiro itojun Hagino struct ip6_hbh { 123686cdd19SJun-ichiro itojun Hagino u_int8_t ip6h_nxt; /* next header */ 124686cdd19SJun-ichiro itojun Hagino u_int8_t ip6h_len; /* length in units of 8 octets */ 125686cdd19SJun-ichiro itojun Hagino /* followed by options */ 126618d51bbSHajimu UMEMOTO } __packed; 127686cdd19SJun-ichiro itojun Hagino 128686cdd19SJun-ichiro itojun Hagino /* Destination options header */ 129686cdd19SJun-ichiro itojun Hagino /* XXX should we pad it to force alignment on an 8-byte boundary? */ 130686cdd19SJun-ichiro itojun Hagino struct ip6_dest { 131686cdd19SJun-ichiro itojun Hagino u_int8_t ip6d_nxt; /* next header */ 132686cdd19SJun-ichiro itojun Hagino u_int8_t ip6d_len; /* length in units of 8 octets */ 133686cdd19SJun-ichiro itojun Hagino /* followed by options */ 134618d51bbSHajimu UMEMOTO } __packed; 135686cdd19SJun-ichiro itojun Hagino 136686cdd19SJun-ichiro itojun Hagino /* Option types and related macros */ 137686cdd19SJun-ichiro itojun Hagino #define IP6OPT_PAD1 0x00 /* 00 0 00000 */ 138686cdd19SJun-ichiro itojun Hagino #define IP6OPT_PADN 0x01 /* 00 0 00001 */ 139686cdd19SJun-ichiro itojun Hagino #define IP6OPT_JUMBO 0xC2 /* 11 0 00010 = 194 */ 14033841545SHajimu UMEMOTO #define IP6OPT_NSAP_ADDR 0xC3 /* 11 0 00011 */ 14133841545SHajimu UMEMOTO #define IP6OPT_TUNNEL_LIMIT 0x04 /* 00 0 00100 */ 142f95d4633SHajimu UMEMOTO #ifndef _KERNEL 14333841545SHajimu UMEMOTO #define IP6OPT_RTALERT 0x05 /* 00 0 00101 (KAME definition) */ 144f95d4633SHajimu UMEMOTO #endif 14518b35df8SHajimu UMEMOTO #define IP6OPT_ROUTER_ALERT 0x05 /* 00 0 00101 (RFC3542, recommended) */ 14633841545SHajimu UMEMOTO 147686cdd19SJun-ichiro itojun Hagino #define IP6OPT_RTALERT_LEN 4 148686cdd19SJun-ichiro itojun Hagino #define IP6OPT_RTALERT_MLD 0 /* Datagram contains an MLD message */ 149686cdd19SJun-ichiro itojun Hagino #define IP6OPT_RTALERT_RSVP 1 /* Datagram contains an RSVP message */ 150686cdd19SJun-ichiro itojun Hagino #define IP6OPT_RTALERT_ACTNET 2 /* contains an Active Networks msg */ 151686cdd19SJun-ichiro itojun Hagino #define IP6OPT_MINLEN 2 152686cdd19SJun-ichiro itojun Hagino 15333841545SHajimu UMEMOTO #define IP6OPT_EID 0x8a /* 10 0 01010 */ 15433841545SHajimu UMEMOTO 155686cdd19SJun-ichiro itojun Hagino #define IP6OPT_TYPE(o) ((o) & 0xC0) 156686cdd19SJun-ichiro itojun Hagino #define IP6OPT_TYPE_SKIP 0x00 157686cdd19SJun-ichiro itojun Hagino #define IP6OPT_TYPE_DISCARD 0x40 158686cdd19SJun-ichiro itojun Hagino #define IP6OPT_TYPE_FORCEICMP 0x80 159686cdd19SJun-ichiro itojun Hagino #define IP6OPT_TYPE_ICMP 0xC0 160686cdd19SJun-ichiro itojun Hagino 161686cdd19SJun-ichiro itojun Hagino #define IP6OPT_MUTABLE 0x20 162686cdd19SJun-ichiro itojun Hagino 1636c4eaa87SHajimu UMEMOTO /* IPv6 options: common part */ 1646c4eaa87SHajimu UMEMOTO struct ip6_opt { 1656c4eaa87SHajimu UMEMOTO u_int8_t ip6o_type; 1666c4eaa87SHajimu UMEMOTO u_int8_t ip6o_len; 1676c4eaa87SHajimu UMEMOTO } __packed; 1686c4eaa87SHajimu UMEMOTO 1696c4eaa87SHajimu UMEMOTO /* Jumbo Payload Option */ 1706c4eaa87SHajimu UMEMOTO struct ip6_opt_jumbo { 1716c4eaa87SHajimu UMEMOTO u_int8_t ip6oj_type; 1726c4eaa87SHajimu UMEMOTO u_int8_t ip6oj_len; 1736c4eaa87SHajimu UMEMOTO u_int8_t ip6oj_jumbo_len[4]; 1746c4eaa87SHajimu UMEMOTO } __packed; 17533841545SHajimu UMEMOTO #define IP6OPT_JUMBO_LEN 6 17633841545SHajimu UMEMOTO 1776c4eaa87SHajimu UMEMOTO /* NSAP Address Option */ 1786c4eaa87SHajimu UMEMOTO struct ip6_opt_nsap { 1796c4eaa87SHajimu UMEMOTO u_int8_t ip6on_type; 1806c4eaa87SHajimu UMEMOTO u_int8_t ip6on_len; 1816c4eaa87SHajimu UMEMOTO u_int8_t ip6on_src_nsap_len; 1826c4eaa87SHajimu UMEMOTO u_int8_t ip6on_dst_nsap_len; 1836c4eaa87SHajimu UMEMOTO /* followed by source NSAP */ 1846c4eaa87SHajimu UMEMOTO /* followed by destination NSAP */ 1856c4eaa87SHajimu UMEMOTO } __packed; 1866c4eaa87SHajimu UMEMOTO 1876c4eaa87SHajimu UMEMOTO /* Tunnel Limit Option */ 1886c4eaa87SHajimu UMEMOTO struct ip6_opt_tunnel { 1896c4eaa87SHajimu UMEMOTO u_int8_t ip6ot_type; 1906c4eaa87SHajimu UMEMOTO u_int8_t ip6ot_len; 1916c4eaa87SHajimu UMEMOTO u_int8_t ip6ot_encap_limit; 1926c4eaa87SHajimu UMEMOTO } __packed; 1936c4eaa87SHajimu UMEMOTO 1946c4eaa87SHajimu UMEMOTO /* Router Alert Option */ 1956c4eaa87SHajimu UMEMOTO struct ip6_opt_router { 1966c4eaa87SHajimu UMEMOTO u_int8_t ip6or_type; 1976c4eaa87SHajimu UMEMOTO u_int8_t ip6or_len; 1986c4eaa87SHajimu UMEMOTO u_int8_t ip6or_value[2]; 1996c4eaa87SHajimu UMEMOTO } __packed; 2006c4eaa87SHajimu UMEMOTO /* Router alert values (in network byte order) */ 2016c4eaa87SHajimu UMEMOTO #if BYTE_ORDER == BIG_ENDIAN 2026c4eaa87SHajimu UMEMOTO #define IP6_ALERT_MLD 0x0000 2036c4eaa87SHajimu UMEMOTO #define IP6_ALERT_RSVP 0x0001 2046c4eaa87SHajimu UMEMOTO #define IP6_ALERT_AN 0x0002 2056c4eaa87SHajimu UMEMOTO #else 2066c4eaa87SHajimu UMEMOTO #if BYTE_ORDER == LITTLE_ENDIAN 2076c4eaa87SHajimu UMEMOTO #define IP6_ALERT_MLD 0x0000 2086c4eaa87SHajimu UMEMOTO #define IP6_ALERT_RSVP 0x0100 2096c4eaa87SHajimu UMEMOTO #define IP6_ALERT_AN 0x0200 2106c4eaa87SHajimu UMEMOTO #endif /* LITTLE_ENDIAN */ 2116c4eaa87SHajimu UMEMOTO #endif 2126c4eaa87SHajimu UMEMOTO 213686cdd19SJun-ichiro itojun Hagino /* Routing header */ 214686cdd19SJun-ichiro itojun Hagino struct ip6_rthdr { 215686cdd19SJun-ichiro itojun Hagino u_int8_t ip6r_nxt; /* next header */ 216686cdd19SJun-ichiro itojun Hagino u_int8_t ip6r_len; /* length in units of 8 octets */ 217686cdd19SJun-ichiro itojun Hagino u_int8_t ip6r_type; /* routing type */ 218686cdd19SJun-ichiro itojun Hagino u_int8_t ip6r_segleft; /* segments left */ 219686cdd19SJun-ichiro itojun Hagino /* followed by routing type specific data */ 220618d51bbSHajimu UMEMOTO } __packed; 221686cdd19SJun-ichiro itojun Hagino 2221263305fSBjoern A. Zeeb /* Type 0 Routing header, deprecated by RFC 5095. */ 223686cdd19SJun-ichiro itojun Hagino struct ip6_rthdr0 { 224686cdd19SJun-ichiro itojun Hagino u_int8_t ip6r0_nxt; /* next header */ 225686cdd19SJun-ichiro itojun Hagino u_int8_t ip6r0_len; /* length in units of 8 octets */ 226686cdd19SJun-ichiro itojun Hagino u_int8_t ip6r0_type; /* always zero */ 227686cdd19SJun-ichiro itojun Hagino u_int8_t ip6r0_segleft; /* segments left */ 228c302f5bcSHajimu UMEMOTO u_int32_t ip6r0_reserved; /* reserved field */ 229c302f5bcSHajimu UMEMOTO /* followed by up to 127 struct in6_addr */ 230618d51bbSHajimu UMEMOTO } __packed; 231686cdd19SJun-ichiro itojun Hagino 232686cdd19SJun-ichiro itojun Hagino /* Fragment header */ 233686cdd19SJun-ichiro itojun Hagino struct ip6_frag { 234686cdd19SJun-ichiro itojun Hagino u_int8_t ip6f_nxt; /* next header */ 235686cdd19SJun-ichiro itojun Hagino u_int8_t ip6f_reserved; /* reserved field */ 236686cdd19SJun-ichiro itojun Hagino u_int16_t ip6f_offlg; /* offset, reserved, and flag */ 237686cdd19SJun-ichiro itojun Hagino u_int32_t ip6f_ident; /* identification */ 238618d51bbSHajimu UMEMOTO } __packed; 239686cdd19SJun-ichiro itojun Hagino 240686cdd19SJun-ichiro itojun Hagino #if BYTE_ORDER == BIG_ENDIAN 241686cdd19SJun-ichiro itojun Hagino #define IP6F_OFF_MASK 0xfff8 /* mask out offset from _offlg */ 242686cdd19SJun-ichiro itojun Hagino #define IP6F_RESERVED_MASK 0x0006 /* reserved bits in ip6f_offlg */ 243686cdd19SJun-ichiro itojun Hagino #define IP6F_MORE_FRAG 0x0001 /* more-fragments flag */ 244686cdd19SJun-ichiro itojun Hagino #else /* BYTE_ORDER == LITTLE_ENDIAN */ 245686cdd19SJun-ichiro itojun Hagino #define IP6F_OFF_MASK 0xf8ff /* mask out offset from _offlg */ 246686cdd19SJun-ichiro itojun Hagino #define IP6F_RESERVED_MASK 0x0600 /* reserved bits in ip6f_offlg */ 247686cdd19SJun-ichiro itojun Hagino #define IP6F_MORE_FRAG 0x0100 /* more-fragments flag */ 248686cdd19SJun-ichiro itojun Hagino #endif /* BYTE_ORDER == LITTLE_ENDIAN */ 249686cdd19SJun-ichiro itojun Hagino 250686cdd19SJun-ichiro itojun Hagino /* 251686cdd19SJun-ichiro itojun Hagino * Internet implementation parameters. 252686cdd19SJun-ichiro itojun Hagino */ 25318b35df8SHajimu UMEMOTO #define IPV6_MAXHLIM 255 /* maximum hoplimit */ 254686cdd19SJun-ichiro itojun Hagino #define IPV6_DEFHLIM 64 /* default hlim */ 255686cdd19SJun-ichiro itojun Hagino #define IPV6_FRAGTTL 120 /* ttl for fragment packets, in slowtimo tick */ 25618b35df8SHajimu UMEMOTO #define IPV6_HLIMDEC 1 /* subtracted when forwarding */ 257686cdd19SJun-ichiro itojun Hagino 258686cdd19SJun-ichiro itojun Hagino #define IPV6_MMTU 1280 /* minimal MTU and reassembly. 1024 + 256 */ 259686cdd19SJun-ichiro itojun Hagino #define IPV6_MAXPACKET 65535 /* ip6 max packet size without Jumbo payload*/ 260a5d1aae3SHajimu UMEMOTO #define IPV6_MAXOPTHDR 2048 /* max option header size, 256 64-bit words */ 261686cdd19SJun-ichiro itojun Hagino 262686cdd19SJun-ichiro itojun Hagino #ifdef _KERNEL 263686cdd19SJun-ichiro itojun Hagino /* 264686cdd19SJun-ichiro itojun Hagino * IP6_EXTHDR_CHECK ensures that region between the IP6 header and the 265686cdd19SJun-ichiro itojun Hagino * target header (including IPv6 itself, extension headers and 2666d79f3f6SRebecca Cran * TCP/UDP/ICMP6 headers) are contiguous. KAME requires drivers 267686cdd19SJun-ichiro itojun Hagino * to store incoming data into one internal mbuf or one or more external 268686cdd19SJun-ichiro itojun Hagino * mbufs(never into two or more internal mbufs). Thus, the third case is 269686cdd19SJun-ichiro itojun Hagino * supposed to never be matched but is prepared just in case. 270686cdd19SJun-ichiro itojun Hagino */ 271686cdd19SJun-ichiro itojun Hagino 272686cdd19SJun-ichiro itojun Hagino #define IP6_EXTHDR_CHECK(m, off, hlen, ret) \ 273686cdd19SJun-ichiro itojun Hagino do { \ 274686cdd19SJun-ichiro itojun Hagino if ((m)->m_next != NULL) { \ 275686cdd19SJun-ichiro itojun Hagino if (((m)->m_flags & M_LOOP) && \ 276686cdd19SJun-ichiro itojun Hagino ((m)->m_len < (off) + (hlen)) && \ 277686cdd19SJun-ichiro itojun Hagino (((m) = m_pullup((m), (off) + (hlen))) == NULL)) { \ 2789cb8d207SAndrey V. Elsukov IP6STAT_INC(ip6s_exthdrtoolong); \ 279686cdd19SJun-ichiro itojun Hagino return ret; \ 280686cdd19SJun-ichiro itojun Hagino } else { \ 281686cdd19SJun-ichiro itojun Hagino if ((m)->m_len < (off) + (hlen)) { \ 2829cb8d207SAndrey V. Elsukov IP6STAT_INC(ip6s_exthdrtoolong); \ 283686cdd19SJun-ichiro itojun Hagino m_freem(m); \ 284686cdd19SJun-ichiro itojun Hagino return ret; \ 285686cdd19SJun-ichiro itojun Hagino } \ 286686cdd19SJun-ichiro itojun Hagino } \ 287686cdd19SJun-ichiro itojun Hagino } else { \ 288686cdd19SJun-ichiro itojun Hagino if ((m)->m_len < (off) + (hlen)) { \ 2899cb8d207SAndrey V. Elsukov IP6STAT_INC(ip6s_tooshort); \ 290686cdd19SJun-ichiro itojun Hagino in6_ifstat_inc(m->m_pkthdr.rcvif, ifs6_in_truncated); \ 291686cdd19SJun-ichiro itojun Hagino m_freem(m); \ 292686cdd19SJun-ichiro itojun Hagino return ret; \ 293686cdd19SJun-ichiro itojun Hagino } \ 294686cdd19SJun-ichiro itojun Hagino } \ 2955c6ebad8SHajimu UMEMOTO } while (/*CONSTCOND*/ 0) 296686cdd19SJun-ichiro itojun Hagino 297686cdd19SJun-ichiro itojun Hagino /* 298686cdd19SJun-ichiro itojun Hagino * IP6_EXTHDR_GET ensures that intermediate protocol header (from "off" to 299686cdd19SJun-ichiro itojun Hagino * "len") is located in single mbuf, on contiguous memory region. 300686cdd19SJun-ichiro itojun Hagino * The pointer to the region will be returned to pointer variable "val", 301686cdd19SJun-ichiro itojun Hagino * with type "typ". 302686cdd19SJun-ichiro itojun Hagino * IP6_EXTHDR_GET0 does the same, except that it aligns the structure at the 303686cdd19SJun-ichiro itojun Hagino * very top of mbuf. GET0 is likely to make memory copy than GET. 304686cdd19SJun-ichiro itojun Hagino * 305686cdd19SJun-ichiro itojun Hagino * XXX we're now testing this, needs m_pulldown() 306686cdd19SJun-ichiro itojun Hagino */ 307686cdd19SJun-ichiro itojun Hagino #define IP6_EXTHDR_GET(val, typ, m, off, len) \ 308686cdd19SJun-ichiro itojun Hagino do { \ 309686cdd19SJun-ichiro itojun Hagino struct mbuf *t; \ 310686cdd19SJun-ichiro itojun Hagino int tmp; \ 311686cdd19SJun-ichiro itojun Hagino if ((m)->m_len >= (off) + (len)) \ 312686cdd19SJun-ichiro itojun Hagino (val) = (typ)(mtod((m), caddr_t) + (off)); \ 313686cdd19SJun-ichiro itojun Hagino else { \ 314686cdd19SJun-ichiro itojun Hagino t = m_pulldown((m), (off), (len), &tmp); \ 315686cdd19SJun-ichiro itojun Hagino if (t) { \ 316686cdd19SJun-ichiro itojun Hagino if (t->m_len < tmp + (len)) \ 317686cdd19SJun-ichiro itojun Hagino panic("m_pulldown malfunction"); \ 318686cdd19SJun-ichiro itojun Hagino (val) = (typ)(mtod(t, caddr_t) + tmp); \ 319686cdd19SJun-ichiro itojun Hagino } else { \ 320686cdd19SJun-ichiro itojun Hagino (val) = (typ)NULL; \ 321686cdd19SJun-ichiro itojun Hagino (m) = NULL; \ 322686cdd19SJun-ichiro itojun Hagino } \ 323686cdd19SJun-ichiro itojun Hagino } \ 3245c6ebad8SHajimu UMEMOTO } while (/*CONSTCOND*/ 0) 325686cdd19SJun-ichiro itojun Hagino 326686cdd19SJun-ichiro itojun Hagino #define IP6_EXTHDR_GET0(val, typ, m, off, len) \ 327686cdd19SJun-ichiro itojun Hagino do { \ 328686cdd19SJun-ichiro itojun Hagino struct mbuf *t; \ 329686cdd19SJun-ichiro itojun Hagino if ((off) == 0) \ 330686cdd19SJun-ichiro itojun Hagino (val) = (typ)mtod(m, caddr_t); \ 331686cdd19SJun-ichiro itojun Hagino else { \ 332686cdd19SJun-ichiro itojun Hagino t = m_pulldown((m), (off), (len), NULL); \ 333686cdd19SJun-ichiro itojun Hagino if (t) { \ 334686cdd19SJun-ichiro itojun Hagino if (t->m_len < (len)) \ 335686cdd19SJun-ichiro itojun Hagino panic("m_pulldown malfunction"); \ 336686cdd19SJun-ichiro itojun Hagino (val) = (typ)mtod(t, caddr_t); \ 337686cdd19SJun-ichiro itojun Hagino } else { \ 338686cdd19SJun-ichiro itojun Hagino (val) = (typ)NULL; \ 339686cdd19SJun-ichiro itojun Hagino (m) = NULL; \ 340686cdd19SJun-ichiro itojun Hagino } \ 341686cdd19SJun-ichiro itojun Hagino } \ 3425c6ebad8SHajimu UMEMOTO } while (/*CONSTCOND*/ 0) 3438b615593SMarko Zec 344686cdd19SJun-ichiro itojun Hagino #endif /*_KERNEL*/ 345686cdd19SJun-ichiro itojun Hagino 346686cdd19SJun-ichiro itojun Hagino #endif /* not _NETINET_IP6_H_ */ 347