2 * Definitions for IPv6 packet disassembly
4 * $Id: packet-ipv6.h,v 1.12 2000/02/15 21:02:22 gram 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__
29 void dissect_ipv6(const u_char *, int, frame_data *, proto_tree *);
36 } u6_addr; /* 128 bit IP6 address */
55 #define s6_addr32 u6_addr.u6_addr32
56 #define s6_addr16 u6_addr.u6_addr16
57 #define s6_addr8 u6_addr.u6_addr8
58 #define s6_addr u6_addr.u6_addr8
60 #define INET6_ADDRSTRLEN 46
63 * Definition for internet protocol version 6.
69 guint32 ip6_un1_flow; /* 20 bits of flow-ID */
70 guint16 ip6_un1_plen; /* payload length */
71 guint8 ip6_un1_nxt; /* next header */
72 guint8 ip6_un1_hlim; /* hop limit */
74 guint8 ip6_un2_vfc; /* 4 bits version, 4 bits class */
76 struct e_in6_addr ip6_src; /* source address */
77 struct e_in6_addr ip6_dst; /* destination address */
80 #define ip6_vfc ip6_ctlun.ip6_un2_vfc
81 #define ip6_flow ip6_ctlun.ip6_un1.ip6_un1_flow
82 #define ip6_plen ip6_ctlun.ip6_un1.ip6_un1_plen
83 #define ip6_nxt ip6_ctlun.ip6_un1.ip6_un1_nxt
84 #define ip6_hlim ip6_ctlun.ip6_un1.ip6_un1_hlim
85 #define ip6_hops ip6_ctlun.ip6_un1.ip6_un1_hlim
87 /* Offsets of fields within an IPv6 header. */
89 #define IP6H_CTL_FLOW 0
90 #define IP6H_CTL_PLEN 4
91 #define IP6H_CTL_NXT 6
92 #define IP6H_CTL_HLIM 7
93 #define IP6H_CTL_VFC 0
97 #ifdef WORDS_BIGENDIAN
98 #define IPV6_FLOWINFO_MASK 0x0fffffff /* flow info (28 bits) */
99 #define IPV6_FLOWLABEL_MASK 0x000fffff /* flow label (20 bits) */
101 #define IPV6_FLOWINFO_MASK 0xffffff0f /* flow info (28 bits) */
102 #define IPV6_FLOWLABEL_MASK 0xffff0f00 /* flow label (20 bits) */
114 /* Hop-by-Hop options header */
115 /* XXX should we pad it to force alignment on an 8-byte boundary? */
117 guint8 ip6h_nxt; /* next header */
118 guint8 ip6h_len; /* length in units of 8 octets */
119 /* followed by options */
122 /* Destination options header */
123 /* XXX should we pad it to force alignment on an 8-byte boundary? */
125 guint8 ip6d_nxt; /* next header */
126 guint8 ip6d_len; /* length in units of 8 octets */
127 /* followed by options */
130 /* Option types and related macros */
131 #define IP6OPT_PAD1 0x00 /* 00 0 00000 */
132 #define IP6OPT_PADN 0x01 /* 00 0 00001 */
133 #define IP6OPT_JUMBO 0xC2 /* 11 0 00010 = 194 */
134 #define IP6OPT_JUMBO_LEN 6
135 #define IP6OPT_RTALERT 0x05 /* 00 0 00101 */
136 #define IP6OPT_RTALERT_LEN 4
137 #define IP6OPT_RTALERT_MLD 0 /* Datagram contains MLD message */
138 #define IP6OPT_RTALERT_RSVP 1 /* Datagram contains RSVP message */
139 #define IP6OPT_MINLEN 2
141 #define IP6OPT_TYPE(o) ((o) & 0xC0)
142 #define IP6OPT_TYPE_SKIP 0x00
143 #define IP6OPT_TYPE_DISCARD 0x40
144 #define IP6OPT_TYPE_FORCEICMP 0x80
145 #define IP6OPT_TYPE_ICMP 0xC0
147 #define IP6OPT_MUTABLE 0x20
151 guint8 ip6r_nxt; /* next header */
152 guint8 ip6r_len; /* length in units of 8 octets */
153 guint8 ip6r_type; /* routing type */
154 guint8 ip6r_segleft; /* segments left */
155 /* followed by routing type specific data */
158 /* Type 0 Routing header */
160 guint8 ip6r0_nxt; /* next header */
161 guint8 ip6r0_len; /* length in units of 8 octets */
162 guint8 ip6r0_type; /* always zero */
163 guint8 ip6r0_segleft; /* segments left */
164 guint8 ip6r0_reserved; /* reserved field */
165 guint8 ip6r0_slmap[3]; /* strict/loose bit map */
166 struct e_in6_addr ip6r0_addr[1]; /* up to 23 addresses */
169 /* Fragment header */
171 guint8 ip6f_nxt; /* next header */
172 guint8 ip6f_reserved; /* reserved field */
173 guint16 ip6f_offlg; /* offset, reserved, and flag */
174 guint32 ip6f_ident; /* identification */
177 #if BYTE_ORDER == BIG_ENDIAN
178 #define IP6F_OFF_MASK 0xfff8 /* mask out offset from _offlg */
179 #define IP6F_RESERVED_MASK 0x0006 /* reserved bits in ip6f_offlg */
180 #define IP6F_MORE_FRAG 0x0001 /* more-fragments flag */
181 #else /* BYTE_ORDER == LITTLE_ENDIAN */
182 #define IP6F_OFF_MASK 0xf8ff /* mask out offset from _offlg */
183 #define IP6F_RESERVED_MASK 0x0600 /* reserved bits in ip6f_offlg */
184 #define IP6F_MORE_FRAG 0x0100 /* more-fragments flag */
185 #endif /* BYTE_ORDER == LITTLE_ENDIAN */
188 * Definition for ICMPv6.
192 #define ICMPV6_PLD_MAXLEN 1232 /* IPV6_MMTU - sizeof(struct ip6_hdr)
193 - sizeof(struct icmp6_hdr) */
196 guint8 icmp6_type; /* type field */
197 guint8 icmp6_code; /* code field */
198 guint16 icmp6_cksum; /* checksum field */
200 guint32 icmp6_un_data32[1]; /* type-specific field */
201 guint16 icmp6_un_data16[2]; /* type-specific field */
202 guint8 icmp6_un_data8[4]; /* type-specific field */
206 #define icmp6_data32 icmp6_dataun.icmp6_un_data32
207 #define icmp6_data16 icmp6_dataun.icmp6_un_data16
208 #define icmp6_data8 icmp6_dataun.icmp6_un_data8
209 #define icmp6_pptr icmp6_data32[0] /* parameter prob */
210 #define icmp6_mtu icmp6_data32[0] /* packet too big */
211 #define icmp6_id icmp6_data16[0] /* echo request/reply */
212 #define icmp6_seq icmp6_data16[1] /* echo request/reply */
213 #define icmp6_maxdelay icmp6_data16[0] /* mcast group membership */
215 #define ICMP6_DST_UNREACH 1 /* dest unreachable, codes: */
216 #define ICMP6_PACKET_TOO_BIG 2 /* packet too big */
217 #define ICMP6_TIME_EXCEEDED 3 /* time exceeded, code: */
218 #define ICMP6_PARAM_PROB 4 /* ip6 header bad */
220 #define ICMP6_ECHO_REQUEST 128 /* echo service */
221 #define ICMP6_ECHO_REPLY 129 /* echo reply */
222 #define ICMP6_MEMBERSHIP_QUERY 130 /* group membership query */
223 #define MLD6_LISTENER_QUERY 130 /* multicast listener query */
224 #define ICMP6_MEMBERSHIP_REPORT 131 /* group membership report */
225 #define MLD6_LISTENER_REPORT 131 /* multicast listener report */
226 #define ICMP6_MEMBERSHIP_REDUCTION 132 /* group membership termination */
227 #define MLD6_LISTENER_DONE 132 /* multicast listener done */
229 #define ND_ROUTER_SOLICIT 133 /* router solicitation */
230 #define ND_ROUTER_ADVERT 134 /* router advertisment */
231 #define ND_NEIGHBOR_SOLICIT 135 /* neighbor solicitation */
232 #define ND_NEIGHBOR_ADVERT 136 /* neighbor advertisment */
233 #define ND_REDIRECT 137 /* redirect */
235 #define ICMP6_ROUTER_RENUMBERING 138 /* router renumbering */
237 /* xxx: actually not assigned yet */
238 #define ICMP6_WRUREQUEST 140 /* who are you request */
239 #define ICMP6_WRUREPLY 141 /* who are you reply */
240 #define ICMP6_FQDN_QUERY 140 /* FQDN query */
241 #define ICMP6_FQDN_REPLY 141 /* FQDN reply */
243 #define ICMP6_MAXTYPE 141
245 #define ICMP6_DST_UNREACH_NOROUTE 0 /* no route to destination */
246 #define ICMP6_DST_UNREACH_ADMIN 1 /* administratively prohibited */
247 #define ICMP6_DST_UNREACH_NOTNEIGHBOR 2 /* not a neighbor */
248 #define ICMP6_DST_UNREACH_ADDR 3 /* address unreachable */
249 #define ICMP6_DST_UNREACH_NOPORT 4 /* port unreachable */
251 #define ICMP6_TIME_EXCEED_TRANSIT 0 /* ttl==0 in transit */
252 #define ICMP6_TIME_EXCEED_REASSEMBLY 1 /* ttl==0 in reass */
254 #define ICMP6_PARAMPROB_HEADER 0 /* erroneous header field */
255 #define ICMP6_PARAMPROB_NEXTHEADER 1 /* unrecognized next header */
256 #define ICMP6_PARAMPROB_OPTION 2 /* unrecognized option */
258 #define ICMP6_INFOMSG_MASK 0x80 /* all informational messages */
260 #define ICMP6_ROUTER_RENUMBERING_COMMAND 0 /* rr command */
261 #define ICMP6_ROUTER_RENUMBERING_RESULT 1 /* rr result */
262 #define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET 255 /* rr seq num reset */
265 * Multicast Listener Discovery
268 struct icmp6_hdr mld6_hdr;
269 struct e_in6_addr mld6_addr; /* multicast address */
272 #define mld6_type mld6_hdr.icmp6_type
273 #define mld6_code mld6_hdr.icmp6_code
274 #define mld6_cksum mld6_hdr.icmp6_cksum
275 #define mld6_maxdelay mld6_hdr.icmp6_data16[0]
276 #define mld6_reserved mld6_hdr.icmp6_data16[1]
282 struct nd_router_solicit { /* router solicitation */
283 struct icmp6_hdr nd_rs_hdr;
284 /* could be followed by options */
287 #define nd_rs_type nd_rs_hdr.icmp6_type
288 #define nd_rs_code nd_rs_hdr.icmp6_code
289 #define nd_rs_cksum nd_rs_hdr.icmp6_cksum
290 #define nd_rs_reserved nd_rs_hdr.icmp6_data32[0]
292 struct nd_router_advert { /* router advertisement */
293 struct icmp6_hdr nd_ra_hdr;
294 guint32 nd_ra_reachable; /* reachable time */
295 guint32 nd_ra_retransmit; /* retransmit timer */
296 /* could be followed by options */
299 #define nd_ra_type nd_ra_hdr.icmp6_type
300 #define nd_ra_code nd_ra_hdr.icmp6_code
301 #define nd_ra_cksum nd_ra_hdr.icmp6_cksum
302 #define nd_ra_curhoplimit nd_ra_hdr.icmp6_data8[0]
303 #define nd_ra_flags_reserved nd_ra_hdr.icmp6_data8[1]
304 #define ND_RA_FLAG_MANAGED 0x80
305 #define ND_RA_FLAG_OTHER 0x40
306 #define nd_ra_router_lifetime nd_ra_hdr.icmp6_data16[1]
308 struct nd_neighbor_solicit { /* neighbor solicitation */
309 struct icmp6_hdr nd_ns_hdr;
310 struct e_in6_addr nd_ns_target; /*target address */
311 /* could be followed by options */
314 #define nd_ns_type nd_ns_hdr.icmp6_type
315 #define nd_ns_code nd_ns_hdr.icmp6_code
316 #define nd_ns_cksum nd_ns_hdr.icmp6_cksum
317 #define nd_ns_reserved nd_ns_hdr.icmp6_data32[0]
319 struct nd_neighbor_advert { /* neighbor advertisement */
320 struct icmp6_hdr nd_na_hdr;
321 struct e_in6_addr nd_na_target; /* target address */
322 /* could be followed by options */
325 #define nd_na_type nd_na_hdr.icmp6_type
326 #define nd_na_code nd_na_hdr.icmp6_code
327 #define nd_na_cksum nd_na_hdr.icmp6_cksum
328 #define nd_na_flags_reserved nd_na_hdr.icmp6_data32[0]
329 #if BYTE_ORDER == BIG_ENDIAN
330 #define ND_NA_FLAG_ROUTER 0x80000000
331 #define ND_NA_FLAG_SOLICITED 0x40000000
332 #define ND_NA_FLAG_OVERRIDE 0x20000000
333 #elif BYTE_ORDER == LITTLE_ENDIAN
334 #define ND_NA_FLAG_ROUTER 0x80
335 #define ND_NA_FLAG_SOLICITED 0x40
336 #define ND_NA_FLAG_OVERRIDE 0x20
339 struct nd_redirect { /* redirect */
340 struct icmp6_hdr nd_rd_hdr;
341 struct e_in6_addr nd_rd_target; /* target address */
342 struct e_in6_addr nd_rd_dst; /* destination address */
343 /* could be followed by options */
346 #define nd_rd_type nd_rd_hdr.icmp6_type
347 #define nd_rd_code nd_rd_hdr.icmp6_code
348 #define nd_rd_cksum nd_rd_hdr.icmp6_cksum
349 #define nd_rd_reserved nd_rd_hdr.icmp6_data32[0]
351 struct nd_opt_hdr { /* Neighbor discovery option header */
354 /* followed by option specific data*/
357 #define ND_OPT_SOURCE_LINKADDR 1
358 #define ND_OPT_TARGET_LINKADDR 2
359 #define ND_OPT_PREFIX_INFORMATION 3
360 #define ND_OPT_REDIRECTED_HEADER 4
363 struct nd_opt_prefix_info { /* prefix information */
364 guint8 nd_opt_pi_type;
365 guint8 nd_opt_pi_len;
366 guint8 nd_opt_pi_prefix_len;
367 guint8 nd_opt_pi_flags_reserved;
368 guint32 nd_opt_pi_valid_time;
369 guint32 nd_opt_pi_preferred_time;
370 guint32 nd_opt_pi_reserved2;
371 struct e_in6_addr nd_opt_pi_prefix;
374 #define ND_OPT_PI_FLAG_ONLINK 0x80
375 #define ND_OPT_PI_FLAG_AUTO 0x40
377 struct nd_opt_rd_hdr { /* redirected header */
378 guint8 nd_opt_rh_type;
379 guint8 nd_opt_rh_len;
380 guint16 nd_opt_rh_reserved1;
381 guint32 nd_opt_rh_reserved2;
382 /* followed by IP header and data */
385 struct nd_opt_mtu { /* MTU option */
386 guint8 nd_opt_mtu_type;
387 guint8 nd_opt_mtu_len;
388 guint16 nd_opt_mtu_reserved;
389 guint32 nd_opt_mtu_mtu;
393 /* disregard until used. We have to decide how to handle guint64 */
398 struct icmp6_namelookup {
399 struct icmp6_hdr icmp6_nl_hdr;
400 guint64 icmp6_nl_nonce;
401 guint32 icmp6_nl_ttl;
404 guint8 icmp6_nl_name[3];
406 /* could be followed by options */
411 * Router Renumbering. as router-renum-05.txt
413 #if BYTE_ORDER == BIG_ENDIAN /* net byte order */
414 struct icmp6_router_renum { /* router renumbering header */
415 struct icmp6_hdr rr_hdr;
418 guint32 rr_reqresult : 1;
419 guint32 rr_forceapply : 1;
420 guint32 rr_specsite : 1;
421 guint32 rr_prevdone : 1;
422 guint32 rr_flags_reserved : 3;
426 #elif BYTE_ORDER == LITTLE_ENDIAN
427 struct icmp6_router_renum { /* router renumbering header */
428 struct icmp6_hdr rr_hdr;
430 guint32 rr_flags_reserved : 3;
431 guint32 rr_prevdone : 1;
432 guint32 rr_specsite : 1;
433 guint32 rr_forceapply : 1;
434 guint32 rr_reqresult : 1;
439 #endif /* BYTE_ORDER */
441 #define rr_type rr_hdr.icmp6_type
442 #define rr_code rr_hdr.icmp6_code
443 #define rr_cksum rr_hdr.icmp6_cksum
444 #define rr_seqnum rr_hdr.icmp6_data32[0]
446 struct rr_pco_match { /* match prefix part */
453 guint16 rpm_reserved;
454 struct e_in6_addr rpm_prefix;
457 #define RPM_PCO_ADD 1
458 #define RPM_PCO_CHANGE 2
459 #define RPM_PCO_SETGLOBAL 3
460 #define RPM_PCO_MAX 4
462 #if BYTE_ORDER == BIG_ENDIAN /* net byte order */
463 struct rr_pco_use { /* use prefix part */
466 guint32 rpu_mask_onlink : 1;
467 guint32 rpu_mask_autonomous : 1;
468 guint32 rpu_mask_reserved : 6;
469 guint32 rpu_onlink : 1;
470 guint32 rpu_autonomous : 1;
471 guint32 rpu_raflags_reserved : 6;
474 guint32 rpu_decr_vltime : 1;
475 guint32 rpu_decr_pltime : 1;
476 guint32 rpu_flags_reserved : 6;
477 guint32 rpu_reserved : 24;
478 struct e_in6_addr rpu_prefix;
480 #elif BYTE_ORDER == LITTLE_ENDIAN
481 struct rr_pco_use { /* use prefix part */
484 guint32 rpu_mask_reserved : 6;
485 guint32 rpu_mask_autonomous : 1;
486 guint32 rpu_mask_onlink : 1;
487 guint32 rpu_raflags_reserved : 6;
488 guint32 rpu_autonomous : 1;
489 guint32 rpu_onlink : 1;
492 guint32 rpu_flags_reserved : 6;
493 guint32 rpu_decr_pltime : 1;
494 guint32 rpu_decr_vltime : 1;
495 guint32 rpu_reserved : 24;
496 struct e_in6_addr rpu_prefix;
498 #endif /* BYTE_ORDER */
500 #if BYTE_ORDER == BIG_ENDIAN /* net byte order */
501 struct rr_result { /* router renumbering result message */
503 guint32 rrr_flags_reserved : 6;
504 guint32 rrr_outofbound : 1;
505 guint32 rrr_forbidden : 1;
507 guint8 rrr_matchedlen;
509 struct e_in6_addr rrr_prefix;
511 #elif BYTE_ORDER == LITTLE_ENDIAN
512 struct rr_result { /* router renumbering result message */
514 guint32 rrr_forbidden : 1;
515 guint32 rrr_outofbound : 1;
516 guint32 rrr_flags_reserved : 6;
518 guint8 rrr_matchedlen;
520 struct e_in6_addr rrr_prefix;
522 #endif /* BYTE_ORDER */
524 #endif /* __PACKET_IPV6_H_DEFINED__ */