2 * Definitions for IPv6 packet disassembly
4 * $Id: packet-ipv6.h,v 1.9 1999/11/18 01:45:05 guy Exp $
6 * Ethereal - Network traffic analyzer
7 * By Gerald Combs <gerald@zing.org>
8 * Copyright 1998 Gerald Combs
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version 2
14 * of the License, or (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
26 #ifndef __PACKET_IPV6_H_DEFINED__
27 #define __PACKET_IPV6_H_DEFINED__
38 } u6_addr; /* 128 bit IP6 address */
57 #define s6_addr32 u6_addr.u6_addr32
58 #define s6_addr16 u6_addr.u6_addr16
59 #define s6_addr8 u6_addr.u6_addr8
60 #define s6_addr u6_addr.u6_addr8
62 #define INET6_ADDRSTRLEN 46
65 * Definition for internet protocol version 6.
71 guint32 ip6_un1_flow; /* 20 bits of flow-ID */
72 guint16 ip6_un1_plen; /* payload length */
73 guint8 ip6_un1_nxt; /* next header */
74 guint8 ip6_un1_hlim; /* hop limit */
76 guint8 ip6_un2_vfc; /* 4 bits version, 4 bits class */
78 struct e_in6_addr ip6_src; /* source address */
79 struct e_in6_addr ip6_dst; /* destination address */
82 #define ip6_vfc ip6_ctlun.ip6_un2_vfc
83 #define ip6_flow ip6_ctlun.ip6_un1.ip6_un1_flow
84 #define ip6_plen ip6_ctlun.ip6_un1.ip6_un1_plen
85 #define ip6_nxt ip6_ctlun.ip6_un1.ip6_un1_nxt
86 #define ip6_hlim ip6_ctlun.ip6_un1.ip6_un1_hlim
87 #define ip6_hops ip6_ctlun.ip6_un1.ip6_un1_hlim
89 /* Offsets of fields within an IPv6 header. */
91 #define IP6H_CTL_FLOW 0
92 #define IP6H_CTL_PLEN 4
93 #define IP6H_CTL_NXT 6
94 #define IP6H_CTL_HLIM 7
95 #define IP6H_CTL_VFC 0
99 #if BYTE_ORDER == BIG_ENDIAN
100 #define IPV6_FLOWINFO_MASK 0x0fffffff /* flow info (28 bits) */
101 #define IPV6_FLOWLABEL_MASK 0x000fffff /* flow label (20 bits) */
102 #endif /* BIG_ENDIAN */
103 #if BYTE_ORDER == LITTLE_ENDIAN
104 #define IPV6_FLOWINFO_MASK 0xffffff0f /* flow info (28 bits) */
105 #define IPV6_FLOWLABEL_MASK 0xffff0f00 /* flow label (20 bits) */
106 #endif /* LITTLE_ENDIAN */
117 /* Hop-by-Hop options header */
118 /* XXX should we pad it to force alignment on an 8-byte boundary? */
120 guint8 ip6h_nxt; /* next header */
121 guint8 ip6h_len; /* length in units of 8 octets */
122 /* followed by options */
125 /* Destination options header */
126 /* XXX should we pad it to force alignment on an 8-byte boundary? */
128 guint8 ip6d_nxt; /* next header */
129 guint8 ip6d_len; /* length in units of 8 octets */
130 /* followed by options */
133 /* Option types and related macros */
134 #define IP6OPT_PAD1 0x00 /* 00 0 00000 */
135 #define IP6OPT_PADN 0x01 /* 00 0 00001 */
136 #define IP6OPT_JUMBO 0xC2 /* 11 0 00010 = 194 */
137 #define IP6OPT_JUMBO_LEN 6
138 #define IP6OPT_RTALERT 0x05 /* 00 0 00101 */
139 #define IP6OPT_RTALERT_LEN 4
140 #define IP6OPT_RTALERT_MLD 0 /* Datagram contains MLD message */
141 #define IP6OPT_RTALERT_RSVP 1 /* Datagram contains RSVP message */
142 #define IP6OPT_MINLEN 2
144 #define IP6OPT_TYPE(o) ((o) & 0xC0)
145 #define IP6OPT_TYPE_SKIP 0x00
146 #define IP6OPT_TYPE_DISCARD 0x40
147 #define IP6OPT_TYPE_FORCEICMP 0x80
148 #define IP6OPT_TYPE_ICMP 0xC0
150 #define IP6OPT_MUTABLE 0x20
154 guint8 ip6r_nxt; /* next header */
155 guint8 ip6r_len; /* length in units of 8 octets */
156 guint8 ip6r_type; /* routing type */
157 guint8 ip6r_segleft; /* segments left */
158 /* followed by routing type specific data */
161 /* Type 0 Routing header */
163 guint8 ip6r0_nxt; /* next header */
164 guint8 ip6r0_len; /* length in units of 8 octets */
165 guint8 ip6r0_type; /* always zero */
166 guint8 ip6r0_segleft; /* segments left */
167 guint8 ip6r0_reserved; /* reserved field */
168 guint8 ip6r0_slmap[3]; /* strict/loose bit map */
169 struct e_in6_addr ip6r0_addr[1]; /* up to 23 addresses */
172 /* Fragment header */
174 guint8 ip6f_nxt; /* next header */
175 guint8 ip6f_reserved; /* reserved field */
176 guint16 ip6f_offlg; /* offset, reserved, and flag */
177 guint32 ip6f_ident; /* identification */
180 #if BYTE_ORDER == BIG_ENDIAN
181 #define IP6F_OFF_MASK 0xfff8 /* mask out offset from _offlg */
182 #define IP6F_RESERVED_MASK 0x0006 /* reserved bits in ip6f_offlg */
183 #define IP6F_MORE_FRAG 0x0001 /* more-fragments flag */
184 #else /* BYTE_ORDER == LITTLE_ENDIAN */
185 #define IP6F_OFF_MASK 0xf8ff /* mask out offset from _offlg */
186 #define IP6F_RESERVED_MASK 0x0600 /* reserved bits in ip6f_offlg */
187 #define IP6F_MORE_FRAG 0x0100 /* more-fragments flag */
188 #endif /* BYTE_ORDER == LITTLE_ENDIAN */
191 * Definition for ICMPv6.
195 #define ICMPV6_PLD_MAXLEN 1232 /* IPV6_MMTU - sizeof(struct ip6_hdr)
196 - sizeof(struct icmp6_hdr) */
199 guint8 icmp6_type; /* type field */
200 guint8 icmp6_code; /* code field */
201 guint16 icmp6_cksum; /* checksum field */
203 guint32 icmp6_un_data32[1]; /* type-specific field */
204 guint16 icmp6_un_data16[2]; /* type-specific field */
205 guint8 icmp6_un_data8[4]; /* type-specific field */
209 #define icmp6_data32 icmp6_dataun.icmp6_un_data32
210 #define icmp6_data16 icmp6_dataun.icmp6_un_data16
211 #define icmp6_data8 icmp6_dataun.icmp6_un_data8
212 #define icmp6_pptr icmp6_data32[0] /* parameter prob */
213 #define icmp6_mtu icmp6_data32[0] /* packet too big */
214 #define icmp6_id icmp6_data16[0] /* echo request/reply */
215 #define icmp6_seq icmp6_data16[1] /* echo request/reply */
216 #define icmp6_maxdelay icmp6_data16[0] /* mcast group membership */
218 #define ICMP6_DST_UNREACH 1 /* dest unreachable, codes: */
219 #define ICMP6_PACKET_TOO_BIG 2 /* packet too big */
220 #define ICMP6_TIME_EXCEEDED 3 /* time exceeded, code: */
221 #define ICMP6_PARAM_PROB 4 /* ip6 header bad */
223 #define ICMP6_ECHO_REQUEST 128 /* echo service */
224 #define ICMP6_ECHO_REPLY 129 /* echo reply */
225 #define ICMP6_MEMBERSHIP_QUERY 130 /* group membership query */
226 #define MLD6_LISTENER_QUERY 130 /* multicast listener query */
227 #define ICMP6_MEMBERSHIP_REPORT 131 /* group membership report */
228 #define MLD6_LISTENER_REPORT 131 /* multicast listener report */
229 #define ICMP6_MEMBERSHIP_REDUCTION 132 /* group membership termination */
230 #define MLD6_LISTENER_DONE 132 /* multicast listener done */
232 #define ND_ROUTER_SOLICIT 133 /* router solicitation */
233 #define ND_ROUTER_ADVERT 134 /* router advertisment */
234 #define ND_NEIGHBOR_SOLICIT 135 /* neighbor solicitation */
235 #define ND_NEIGHBOR_ADVERT 136 /* neighbor advertisment */
236 #define ND_REDIRECT 137 /* redirect */
238 #define ICMP6_ROUTER_RENUMBERING 138 /* router renumbering */
240 /* xxx: actually not assigned yet */
241 #define ICMP6_WRUREQUEST 140 /* who are you request */
242 #define ICMP6_WRUREPLY 141 /* who are you reply */
243 #define ICMP6_FQDN_QUERY 140 /* FQDN query */
244 #define ICMP6_FQDN_REPLY 141 /* FQDN reply */
246 #define ICMP6_MAXTYPE 141
248 #define ICMP6_DST_UNREACH_NOROUTE 0 /* no route to destination */
249 #define ICMP6_DST_UNREACH_ADMIN 1 /* administratively prohibited */
250 #define ICMP6_DST_UNREACH_NOTNEIGHBOR 2 /* not a neighbor */
251 #define ICMP6_DST_UNREACH_ADDR 3 /* address unreachable */
252 #define ICMP6_DST_UNREACH_NOPORT 4 /* port unreachable */
254 #define ICMP6_TIME_EXCEED_TRANSIT 0 /* ttl==0 in transit */
255 #define ICMP6_TIME_EXCEED_REASSEMBLY 1 /* ttl==0 in reass */
257 #define ICMP6_PARAMPROB_HEADER 0 /* erroneous header field */
258 #define ICMP6_PARAMPROB_NEXTHEADER 1 /* unrecognized next header */
259 #define ICMP6_PARAMPROB_OPTION 2 /* unrecognized option */
261 #define ICMP6_INFOMSG_MASK 0x80 /* all informational messages */
263 #define ICMP6_ROUTER_RENUMBERING_COMMAND 0 /* rr command */
264 #define ICMP6_ROUTER_RENUMBERING_RESULT 1 /* rr result */
265 #define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET 255 /* rr seq num reset */
268 * Multicast Listener Discovery
271 struct icmp6_hdr mld6_hdr;
272 struct e_in6_addr mld6_addr; /* multicast address */
275 #define mld6_type mld6_hdr.icmp6_type
276 #define mld6_code mld6_hdr.icmp6_code
277 #define mld6_cksum mld6_hdr.icmp6_cksum
278 #define mld6_maxdelay mld6_hdr.icmp6_data16[0]
279 #define mld6_reserved mld6_hdr.icmp6_data16[1]
285 struct nd_router_solicit { /* router solicitation */
286 struct icmp6_hdr nd_rs_hdr;
287 /* could be followed by options */
290 #define nd_rs_type nd_rs_hdr.icmp6_type
291 #define nd_rs_code nd_rs_hdr.icmp6_code
292 #define nd_rs_cksum nd_rs_hdr.icmp6_cksum
293 #define nd_rs_reserved nd_rs_hdr.icmp6_data32[0]
295 struct nd_router_advert { /* router advertisement */
296 struct icmp6_hdr nd_ra_hdr;
297 guint32 nd_ra_reachable; /* reachable time */
298 guint32 nd_ra_retransmit; /* retransmit timer */
299 /* could be followed by options */
302 #define nd_ra_type nd_ra_hdr.icmp6_type
303 #define nd_ra_code nd_ra_hdr.icmp6_code
304 #define nd_ra_cksum nd_ra_hdr.icmp6_cksum
305 #define nd_ra_curhoplimit nd_ra_hdr.icmp6_data8[0]
306 #define nd_ra_flags_reserved nd_ra_hdr.icmp6_data8[1]
307 #define ND_RA_FLAG_MANAGED 0x80
308 #define ND_RA_FLAG_OTHER 0x40
309 #define nd_ra_router_lifetime nd_ra_hdr.icmp6_data16[1]
311 struct nd_neighbor_solicit { /* neighbor solicitation */
312 struct icmp6_hdr nd_ns_hdr;
313 struct e_in6_addr nd_ns_target; /*target address */
314 /* could be followed by options */
317 #define nd_ns_type nd_ns_hdr.icmp6_type
318 #define nd_ns_code nd_ns_hdr.icmp6_code
319 #define nd_ns_cksum nd_ns_hdr.icmp6_cksum
320 #define nd_ns_reserved nd_ns_hdr.icmp6_data32[0]
322 struct nd_neighbor_advert { /* neighbor advertisement */
323 struct icmp6_hdr nd_na_hdr;
324 struct e_in6_addr nd_na_target; /* target address */
325 /* could be followed by options */
328 #define nd_na_type nd_na_hdr.icmp6_type
329 #define nd_na_code nd_na_hdr.icmp6_code
330 #define nd_na_cksum nd_na_hdr.icmp6_cksum
331 #define nd_na_flags_reserved nd_na_hdr.icmp6_data32[0]
332 #if BYTE_ORDER == BIG_ENDIAN
333 #define ND_NA_FLAG_ROUTER 0x80000000
334 #define ND_NA_FLAG_SOLICITED 0x40000000
335 #define ND_NA_FLAG_OVERRIDE 0x20000000
336 #elif BYTE_ORDER == LITTLE_ENDIAN
337 #define ND_NA_FLAG_ROUTER 0x80
338 #define ND_NA_FLAG_SOLICITED 0x40
339 #define ND_NA_FLAG_OVERRIDE 0x20
342 struct nd_redirect { /* redirect */
343 struct icmp6_hdr nd_rd_hdr;
344 struct e_in6_addr nd_rd_target; /* target address */
345 struct e_in6_addr nd_rd_dst; /* destination address */
346 /* could be followed by options */
349 #define nd_rd_type nd_rd_hdr.icmp6_type
350 #define nd_rd_code nd_rd_hdr.icmp6_code
351 #define nd_rd_cksum nd_rd_hdr.icmp6_cksum
352 #define nd_rd_reserved nd_rd_hdr.icmp6_data32[0]
354 struct nd_opt_hdr { /* Neighbor discovery option header */
357 /* followed by option specific data*/
360 #define ND_OPT_SOURCE_LINKADDR 1
361 #define ND_OPT_TARGET_LINKADDR 2
362 #define ND_OPT_PREFIX_INFORMATION 3
363 #define ND_OPT_REDIRECTED_HEADER 4
366 struct nd_opt_prefix_info { /* prefix information */
367 guint8 nd_opt_pi_type;
368 guint8 nd_opt_pi_len;
369 guint8 nd_opt_pi_prefix_len;
370 guint8 nd_opt_pi_flags_reserved;
371 guint32 nd_opt_pi_valid_time;
372 guint32 nd_opt_pi_preferred_time;
373 guint32 nd_opt_pi_reserved2;
374 struct e_in6_addr nd_opt_pi_prefix;
377 #define ND_OPT_PI_FLAG_ONLINK 0x80
378 #define ND_OPT_PI_FLAG_AUTO 0x40
380 struct nd_opt_rd_hdr { /* redirected header */
381 guint8 nd_opt_rh_type;
382 guint8 nd_opt_rh_len;
383 guint16 nd_opt_rh_reserved1;
384 guint32 nd_opt_rh_reserved2;
385 /* followed by IP header and data */
388 struct nd_opt_mtu { /* MTU option */
389 guint8 nd_opt_mtu_type;
390 guint8 nd_opt_mtu_len;
391 guint16 nd_opt_mtu_reserved;
392 guint32 nd_opt_mtu_mtu;
396 /* disregard until used. We have to decide how to handle guint64 */
401 struct icmp6_namelookup {
402 struct icmp6_hdr icmp6_nl_hdr;
403 guint64 icmp6_nl_nonce;
404 guint32 icmp6_nl_ttl;
407 guint8 icmp6_nl_name[3];
409 /* could be followed by options */
414 * Router Renumbering. as router-renum-05.txt
416 #if BYTE_ORDER == BIG_ENDIAN /* net byte order */
417 struct icmp6_router_renum { /* router renumbering header */
418 struct icmp6_hdr rr_hdr;
421 guint32 rr_reqresult : 1;
422 guint32 rr_forceapply : 1;
423 guint32 rr_specsite : 1;
424 guint32 rr_prevdone : 1;
425 guint32 rr_flags_reserved : 3;
429 #elif BYTE_ORDER == LITTLE_ENDIAN
430 struct icmp6_router_renum { /* router renumbering header */
431 struct icmp6_hdr rr_hdr;
433 guint32 rr_flags_reserved : 3;
434 guint32 rr_prevdone : 1;
435 guint32 rr_specsite : 1;
436 guint32 rr_forceapply : 1;
437 guint32 rr_reqresult : 1;
442 #endif /* BYTE_ORDER */
444 #define rr_type rr_hdr.icmp6_type
445 #define rr_code rr_hdr.icmp6_code
446 #define rr_cksum rr_hdr.icmp6_cksum
447 #define rr_seqnum rr_hdr.icmp6_data32[0]
449 struct rr_pco_match { /* match prefix part */
456 guint16 rpm_reserved;
457 struct e_in6_addr rpm_prefix;
460 #define RPM_PCO_ADD 1
461 #define RPM_PCO_CHANGE 2
462 #define RPM_PCO_SETGLOBAL 3
463 #define RPM_PCO_MAX 4
465 #if BYTE_ORDER == BIG_ENDIAN /* net byte order */
466 struct rr_pco_use { /* use prefix part */
469 guint32 rpu_mask_onlink : 1;
470 guint32 rpu_mask_autonomous : 1;
471 guint32 rpu_mask_reserved : 6;
472 guint32 rpu_onlink : 1;
473 guint32 rpu_autonomous : 1;
474 guint32 rpu_raflags_reserved : 6;
477 guint32 rpu_decr_vltime : 1;
478 guint32 rpu_decr_pltime : 1;
479 guint32 rpu_flags_reserved : 6;
480 guint32 rpu_reserved : 24;
481 struct e_in6_addr rpu_prefix;
483 #elif BYTE_ORDER == LITTLE_ENDIAN
484 struct rr_pco_use { /* use prefix part */
487 guint32 rpu_mask_reserved : 6;
488 guint32 rpu_mask_autonomous : 1;
489 guint32 rpu_mask_onlink : 1;
490 guint32 rpu_raflags_reserved : 6;
491 guint32 rpu_autonomous : 1;
492 guint32 rpu_onlink : 1;
495 guint32 rpu_flags_reserved : 6;
496 guint32 rpu_decr_pltime : 1;
497 guint32 rpu_decr_vltime : 1;
498 guint32 rpu_reserved : 24;
499 struct e_in6_addr rpu_prefix;
501 #endif /* BYTE_ORDER */
503 #if BYTE_ORDER == BIG_ENDIAN /* net byte order */
504 struct rr_result { /* router renumbering result message */
506 guint32 rrr_flags_reserved : 6;
507 guint32 rrr_outofbound : 1;
508 guint32 rrr_forbidden : 1;
510 guint8 rrr_matchedlen;
512 struct e_in6_addr rrr_prefix;
514 #elif BYTE_ORDER == LITTLE_ENDIAN
515 struct rr_result { /* router renumbering result message */
517 guint32 rrr_forbidden : 1;
518 guint32 rrr_outofbound : 1;
519 guint32 rrr_flags_reserved : 6;
521 guint8 rrr_matchedlen;
523 struct e_in6_addr rrr_prefix;
525 #endif /* BYTE_ORDER */
527 #endif /* __PACKET_IPV6_H_DEFINED__ */