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ip6.h (63024) ip6.h (78064)
1/* $FreeBSD: head/sys/netinet/ip6.h 63024 2000-07-12 16:39:13Z itojun $ */
2/* $KAME: ip6.h,v 1.9 2000/07/02 21:01:32 itojun Exp $ */
1/* $FreeBSD: head/sys/netinet/ip6.h 78064 2001-06-11 12:39:29Z ume $ */
2/* $KAME: ip6.h,v 1.18 2001/03/29 05:34:30 itojun Exp $ */
3
4/*
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:

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80 u_int16_t ip6_un1_plen; /* payload length */
81 u_int8_t ip6_un1_nxt; /* next header */
82 u_int8_t ip6_un1_hlim; /* hop limit */
83 } ip6_un1;
84 u_int8_t ip6_un2_vfc; /* 4 bits version, top 4 bits class */
85 } ip6_ctlun;
86 struct in6_addr ip6_src; /* source address */
87 struct in6_addr ip6_dst; /* destination address */
3
4/*
5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:

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80 u_int16_t ip6_un1_plen; /* payload length */
81 u_int8_t ip6_un1_nxt; /* next header */
82 u_int8_t ip6_un1_hlim; /* hop limit */
83 } ip6_un1;
84 u_int8_t ip6_un2_vfc; /* 4 bits version, top 4 bits class */
85 } ip6_ctlun;
86 struct in6_addr ip6_src; /* source address */
87 struct in6_addr ip6_dst; /* destination address */
88};
88} __attribute__((__packed__));
89
90#define ip6_vfc ip6_ctlun.ip6_un2_vfc
91#define ip6_flow ip6_ctlun.ip6_un1.ip6_un1_flow
92#define ip6_plen ip6_ctlun.ip6_un1.ip6_un1_plen
93#define ip6_nxt ip6_ctlun.ip6_un1.ip6_un1_nxt
94#define ip6_hlim ip6_ctlun.ip6_un1.ip6_un1_hlim
95#define ip6_hops ip6_ctlun.ip6_un1.ip6_un1_hlim
96

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101#define IPV6_FLOWINFO_MASK 0x0fffffff /* flow info (28 bits) */
102#define IPV6_FLOWLABEL_MASK 0x000fffff /* flow label (20 bits) */
103#else
104#if BYTE_ORDER == LITTLE_ENDIAN
105#define IPV6_FLOWINFO_MASK 0xffffff0f /* flow info (28 bits) */
106#define IPV6_FLOWLABEL_MASK 0xffff0f00 /* flow label (20 bits) */
107#endif /* LITTLE_ENDIAN */
108#endif
89
90#define ip6_vfc ip6_ctlun.ip6_un2_vfc
91#define ip6_flow ip6_ctlun.ip6_un1.ip6_un1_flow
92#define ip6_plen ip6_ctlun.ip6_un1.ip6_un1_plen
93#define ip6_nxt ip6_ctlun.ip6_un1.ip6_un1_nxt
94#define ip6_hlim ip6_ctlun.ip6_un1.ip6_un1_hlim
95#define ip6_hops ip6_ctlun.ip6_un1.ip6_un1_hlim
96

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101#define IPV6_FLOWINFO_MASK 0x0fffffff /* flow info (28 bits) */
102#define IPV6_FLOWLABEL_MASK 0x000fffff /* flow label (20 bits) */
103#else
104#if BYTE_ORDER == LITTLE_ENDIAN
105#define IPV6_FLOWINFO_MASK 0xffffff0f /* flow info (28 bits) */
106#define IPV6_FLOWLABEL_MASK 0xffff0f00 /* flow label (20 bits) */
107#endif /* LITTLE_ENDIAN */
108#endif
109#if 1
109/* ECN bits proposed by Sally Floyd */
110#define IP6TOS_CE 0x01 /* congestion experienced */
111#define IP6TOS_ECT 0x02 /* ECN-capable transport */
110/* ECN bits proposed by Sally Floyd */
111#define IP6TOS_CE 0x01 /* congestion experienced */
112#define IP6TOS_ECT 0x02 /* ECN-capable transport */
113#endif
112
113/*
114 * Extension Headers
115 */
116
117struct ip6_ext {
114
115/*
116 * Extension Headers
117 */
118
119struct ip6_ext {
118 u_char ip6e_nxt;
119 u_char ip6e_len;
120};
120 u_int8_t ip6e_nxt;
121 u_int8_t ip6e_len;
122} __attribute__((__packed__));
121
122/* Hop-by-Hop options header */
123/* XXX should we pad it to force alignment on an 8-byte boundary? */
124struct ip6_hbh {
125 u_int8_t ip6h_nxt; /* next header */
126 u_int8_t ip6h_len; /* length in units of 8 octets */
127 /* followed by options */
123
124/* Hop-by-Hop options header */
125/* XXX should we pad it to force alignment on an 8-byte boundary? */
126struct ip6_hbh {
127 u_int8_t ip6h_nxt; /* next header */
128 u_int8_t ip6h_len; /* length in units of 8 octets */
129 /* followed by options */
128};
130} __attribute__((__packed__));
129
130/* Destination options header */
131/* XXX should we pad it to force alignment on an 8-byte boundary? */
132struct ip6_dest {
133 u_int8_t ip6d_nxt; /* next header */
134 u_int8_t ip6d_len; /* length in units of 8 octets */
135 /* followed by options */
131
132/* Destination options header */
133/* XXX should we pad it to force alignment on an 8-byte boundary? */
134struct ip6_dest {
135 u_int8_t ip6d_nxt; /* next header */
136 u_int8_t ip6d_len; /* length in units of 8 octets */
137 /* followed by options */
136};
138} __attribute__((__packed__));
137
138/* Option types and related macros */
139#define IP6OPT_PAD1 0x00 /* 00 0 00000 */
140#define IP6OPT_PADN 0x01 /* 00 0 00001 */
141#define IP6OPT_JUMBO 0xC2 /* 11 0 00010 = 194 */
139
140/* Option types and related macros */
141#define IP6OPT_PAD1 0x00 /* 00 0 00000 */
142#define IP6OPT_PADN 0x01 /* 00 0 00001 */
143#define IP6OPT_JUMBO 0xC2 /* 11 0 00010 = 194 */
142#define IP6OPT_JUMBO_LEN 6
143#define IP6OPT_RTALERT 0x05 /* 00 0 00101 */
144#define IP6OPT_NSAP_ADDR 0xC3 /* 11 0 00011 */
145#define IP6OPT_TUNNEL_LIMIT 0x04 /* 00 0 00100 */
146#define IP6OPT_RTALERT 0x05 /* 00 0 00101 (KAME definition) */
147
144#define IP6OPT_RTALERT_LEN 4
145#define IP6OPT_RTALERT_MLD 0 /* Datagram contains an MLD message */
146#define IP6OPT_RTALERT_RSVP 1 /* Datagram contains an RSVP message */
147#define IP6OPT_RTALERT_ACTNET 2 /* contains an Active Networks msg */
148#define IP6OPT_MINLEN 2
149
148#define IP6OPT_RTALERT_LEN 4
149#define IP6OPT_RTALERT_MLD 0 /* Datagram contains an MLD message */
150#define IP6OPT_RTALERT_RSVP 1 /* Datagram contains an RSVP message */
151#define IP6OPT_RTALERT_ACTNET 2 /* contains an Active Networks msg */
152#define IP6OPT_MINLEN 2
153
154#define IP6OPT_BINDING_UPDATE 0xc6 /* 11 0 00110 */
155#define IP6OPT_BINDING_ACK 0x07 /* 00 0 00111 */
156#define IP6OPT_BINDING_REQ 0x08 /* 00 0 01000 */
157#define IP6OPT_HOME_ADDRESS 0xc9 /* 11 0 01001 */
158#define IP6OPT_EID 0x8a /* 10 0 01010 */
159
150#define IP6OPT_TYPE(o) ((o) & 0xC0)
151#define IP6OPT_TYPE_SKIP 0x00
152#define IP6OPT_TYPE_DISCARD 0x40
153#define IP6OPT_TYPE_FORCEICMP 0x80
154#define IP6OPT_TYPE_ICMP 0xC0
155
156#define IP6OPT_MUTABLE 0x20
157
160#define IP6OPT_TYPE(o) ((o) & 0xC0)
161#define IP6OPT_TYPE_SKIP 0x00
162#define IP6OPT_TYPE_DISCARD 0x40
163#define IP6OPT_TYPE_FORCEICMP 0x80
164#define IP6OPT_TYPE_ICMP 0xC0
165
166#define IP6OPT_MUTABLE 0x20
167
168#define IP6OPT_JUMBO_LEN 6
169
158/* Routing header */
159struct ip6_rthdr {
160 u_int8_t ip6r_nxt; /* next header */
161 u_int8_t ip6r_len; /* length in units of 8 octets */
162 u_int8_t ip6r_type; /* routing type */
163 u_int8_t ip6r_segleft; /* segments left */
164 /* followed by routing type specific data */
170/* Routing header */
171struct ip6_rthdr {
172 u_int8_t ip6r_nxt; /* next header */
173 u_int8_t ip6r_len; /* length in units of 8 octets */
174 u_int8_t ip6r_type; /* routing type */
175 u_int8_t ip6r_segleft; /* segments left */
176 /* followed by routing type specific data */
165};
177} __attribute__((__packed__));
166
167/* Type 0 Routing header */
168struct ip6_rthdr0 {
169 u_int8_t ip6r0_nxt; /* next header */
170 u_int8_t ip6r0_len; /* length in units of 8 octets */
171 u_int8_t ip6r0_type; /* always zero */
172 u_int8_t ip6r0_segleft; /* segments left */
173 u_int8_t ip6r0_reserved; /* reserved field */
174 u_int8_t ip6r0_slmap[3]; /* strict/loose bit map */
175 struct in6_addr ip6r0_addr[1]; /* up to 23 addresses */
178
179/* Type 0 Routing header */
180struct ip6_rthdr0 {
181 u_int8_t ip6r0_nxt; /* next header */
182 u_int8_t ip6r0_len; /* length in units of 8 octets */
183 u_int8_t ip6r0_type; /* always zero */
184 u_int8_t ip6r0_segleft; /* segments left */
185 u_int8_t ip6r0_reserved; /* reserved field */
186 u_int8_t ip6r0_slmap[3]; /* strict/loose bit map */
187 struct in6_addr ip6r0_addr[1]; /* up to 23 addresses */
176};
188} __attribute__((__packed__));
177
178/* Fragment header */
179struct ip6_frag {
180 u_int8_t ip6f_nxt; /* next header */
181 u_int8_t ip6f_reserved; /* reserved field */
182 u_int16_t ip6f_offlg; /* offset, reserved, and flag */
183 u_int32_t ip6f_ident; /* identification */
189
190/* Fragment header */
191struct ip6_frag {
192 u_int8_t ip6f_nxt; /* next header */
193 u_int8_t ip6f_reserved; /* reserved field */
194 u_int16_t ip6f_offlg; /* offset, reserved, and flag */
195 u_int32_t ip6f_ident; /* identification */
184};
196} __attribute__((__packed__));
185
186#if BYTE_ORDER == BIG_ENDIAN
187#define IP6F_OFF_MASK 0xfff8 /* mask out offset from _offlg */
188#define IP6F_RESERVED_MASK 0x0006 /* reserved bits in ip6f_offlg */
189#define IP6F_MORE_FRAG 0x0001 /* more-fragments flag */
190#else /* BYTE_ORDER == LITTLE_ENDIAN */
191#define IP6F_OFF_MASK 0xf8ff /* mask out offset from _offlg */
192#define IP6F_RESERVED_MASK 0x0600 /* reserved bits in ip6f_offlg */

--- 104 unchanged lines hidden --- 		197
198#if BYTE_ORDER == BIG_ENDIAN
199#define IP6F_OFF_MASK 0xfff8 /* mask out offset from _offlg */
200#define IP6F_RESERVED_MASK 0x0006 /* reserved bits in ip6f_offlg */
201#define IP6F_MORE_FRAG 0x0001 /* more-fragments flag */
202#else /* BYTE_ORDER == LITTLE_ENDIAN */
203#define IP6F_OFF_MASK 0xf8ff /* mask out offset from _offlg */
204#define IP6F_RESERVED_MASK 0x0600 /* reserved bits in ip6f_offlg */

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