mirror of
https://github.com/the-tcpdump-group/tcpdump.git
synced 2024-11-30 21:44:49 +08:00
f853e73acf
For BGP, this eliminates some cases where routines return -1 on truncation; clean up after that. This also means that some memcpy()s get replaced by UNALIGNED_MEMCPY(), which may fix some issues on processors that don't support unaligned accesses.
2097 lines
62 KiB
C
2097 lines
62 KiB
C
/*
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* Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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/* \summary: IPv6 Internet Control Message Protocol (ICMPv6) printer */
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include "netdissect-stdinc.h"
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#include <stdio.h>
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#include <string.h>
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#include "netdissect.h"
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#include "addrtoname.h"
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#include "addrtostr.h"
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#include "extract.h"
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#include "ip6.h"
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#include "ipproto.h"
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#include "udp.h"
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#include "ah.h"
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/* NetBSD: icmp6.h,v 1.13 2000/08/03 16:30:37 itojun Exp */
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/* $KAME: icmp6.h,v 1.22 2000/08/03 15:25:16 jinmei Exp $ */
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/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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struct icmp6_hdr {
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nd_uint8_t icmp6_type; /* type field */
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nd_uint8_t icmp6_code; /* code field */
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nd_uint16_t icmp6_cksum; /* checksum field */
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union {
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nd_uint32_t icmp6_un_data32[1]; /* type-specific field */
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nd_uint16_t icmp6_un_data16[2]; /* type-specific field */
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nd_uint8_t icmp6_un_data8[4]; /* type-specific field */
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nd_byte icmp6_un_data[1]; /* type-specific field */
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} icmp6_dataun;
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};
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#define icmp6_data32 icmp6_dataun.icmp6_un_data32
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#define icmp6_data16 icmp6_dataun.icmp6_un_data16
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#define icmp6_data8 icmp6_dataun.icmp6_un_data8
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#define icmp6_data icmp6_dataun.icmp6_un_data
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#define icmp6_pptr icmp6_data32[0] /* parameter prob */
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#define icmp6_mtu icmp6_data32[0] /* packet too big */
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#define icmp6_id icmp6_data16[0] /* echo request/reply */
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#define icmp6_seq icmp6_data16[1] /* echo request/reply */
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#define icmp6_maxdelay icmp6_data16[0] /* mcast group membership */
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#define ICMP6_DST_UNREACH 1 /* dest unreachable, codes: */
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#define ICMP6_PACKET_TOO_BIG 2 /* packet too big */
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#define ICMP6_TIME_EXCEEDED 3 /* time exceeded, code: */
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#define ICMP6_PARAM_PROB 4 /* ip6 header bad */
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#define ICMP6_ECHO_REQUEST 128 /* echo service */
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#define ICMP6_ECHO_REPLY 129 /* echo reply */
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#define ICMP6_MEMBERSHIP_QUERY 130 /* group membership query */
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#define MLD6_LISTENER_QUERY 130 /* multicast listener query */
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#define ICMP6_MEMBERSHIP_REPORT 131 /* group membership report */
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#define MLD6_LISTENER_REPORT 131 /* multicast listener report */
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#define ICMP6_MEMBERSHIP_REDUCTION 132 /* group membership termination */
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#define MLD6_LISTENER_DONE 132 /* multicast listener done */
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#define ND_ROUTER_SOLICIT 133 /* router solicitation */
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#define ND_ROUTER_ADVERT 134 /* router advertisement */
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#define ND_NEIGHBOR_SOLICIT 135 /* neighbor solicitation */
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#define ND_NEIGHBOR_ADVERT 136 /* neighbor advertisement */
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#define ND_REDIRECT 137 /* redirect */
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#define ICMP6_ROUTER_RENUMBERING 138 /* router renumbering */
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#define ICMP6_WRUREQUEST 139 /* who are you request */
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#define ICMP6_WRUREPLY 140 /* who are you reply */
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#define ICMP6_FQDN_QUERY 139 /* FQDN query */
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#define ICMP6_FQDN_REPLY 140 /* FQDN reply */
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#define ICMP6_NI_QUERY 139 /* node information request - RFC 4620 */
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#define ICMP6_NI_REPLY 140 /* node information reply - RFC 4620 */
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#define IND_SOLICIT 141 /* inverse neighbor solicitation */
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#define IND_ADVERT 142 /* inverse neighbor advertisement */
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#define ICMP6_V2_MEMBERSHIP_REPORT 143 /* v2 membership report */
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#define MLDV2_LISTENER_REPORT 143 /* v2 multicast listener report */
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#define ICMP6_HADISCOV_REQUEST 144
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#define ICMP6_HADISCOV_REPLY 145
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#define ICMP6_MOBILEPREFIX_SOLICIT 146
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#define ICMP6_MOBILEPREFIX_ADVERT 147
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#define MLD6_MTRACE_RESP 200 /* mtrace response(to sender) */
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#define MLD6_MTRACE 201 /* mtrace messages */
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#define ICMP6_MAXTYPE 201
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#define ICMP6_DST_UNREACH_NOROUTE 0 /* no route to destination */
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#define ICMP6_DST_UNREACH_ADMIN 1 /* administratively prohibited */
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#define ICMP6_DST_UNREACH_NOTNEIGHBOR 2 /* not a neighbor(obsolete) */
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#define ICMP6_DST_UNREACH_BEYONDSCOPE 2 /* beyond scope of source address */
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#define ICMP6_DST_UNREACH_ADDR 3 /* address unreachable */
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#define ICMP6_DST_UNREACH_NOPORT 4 /* port unreachable */
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#define ICMP6_TIME_EXCEED_TRANSIT 0 /* ttl==0 in transit */
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#define ICMP6_TIME_EXCEED_REASSEMBLY 1 /* ttl==0 in reass */
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#define ICMP6_PARAMPROB_HEADER 0 /* erroneous header field */
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#define ICMP6_PARAMPROB_NEXTHEADER 1 /* unrecognized next header */
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#define ICMP6_PARAMPROB_OPTION 2 /* unrecognized option */
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#define ICMP6_PARAMPROB_FRAGHDRCHAIN 3 /* incomplete header chain */
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#define ICMP6_INFOMSG_MASK 0x80 /* all informational messages */
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#define ICMP6_NI_SUBJ_IPV6 0 /* Query Subject is an IPv6 address */
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#define ICMP6_NI_SUBJ_FQDN 1 /* Query Subject is a Domain name */
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#define ICMP6_NI_SUBJ_IPV4 2 /* Query Subject is an IPv4 address */
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#define ICMP6_NI_SUCCESS 0 /* node information successful reply */
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#define ICMP6_NI_REFUSED 1 /* node information request is refused */
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#define ICMP6_NI_UNKNOWN 2 /* unknown Qtype */
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#define ICMP6_ROUTER_RENUMBERING_COMMAND 0 /* rr command */
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#define ICMP6_ROUTER_RENUMBERING_RESULT 1 /* rr result */
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#define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET 255 /* rr seq num reset */
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/* Used in kernel only */
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#define ND_REDIRECT_ONLINK 0 /* redirect to an on-link node */
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#define ND_REDIRECT_ROUTER 1 /* redirect to a better router */
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/*
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* Multicast Listener Discovery
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*/
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struct mld6_hdr {
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struct icmp6_hdr mld6_hdr;
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nd_ipv6 mld6_addr; /* multicast address */
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};
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#define mld6_type mld6_hdr.icmp6_type
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#define mld6_code mld6_hdr.icmp6_code
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#define mld6_cksum mld6_hdr.icmp6_cksum
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#define mld6_maxdelay mld6_hdr.icmp6_data16[0]
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#define mld6_reserved mld6_hdr.icmp6_data16[1]
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#define MLD_MINLEN 24
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#define MLDV2_MINLEN 28
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/*
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* Neighbor Discovery
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*/
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struct nd_router_solicit { /* router solicitation */
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struct icmp6_hdr nd_rs_hdr;
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/* could be followed by options */
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};
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#define nd_rs_type nd_rs_hdr.icmp6_type
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#define nd_rs_code nd_rs_hdr.icmp6_code
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#define nd_rs_cksum nd_rs_hdr.icmp6_cksum
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#define nd_rs_reserved nd_rs_hdr.icmp6_data32[0]
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struct nd_router_advert { /* router advertisement */
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struct icmp6_hdr nd_ra_hdr;
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nd_uint32_t nd_ra_reachable; /* reachable time */
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nd_uint32_t nd_ra_retransmit; /* retransmit timer */
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/* could be followed by options */
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};
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#define nd_ra_type nd_ra_hdr.icmp6_type
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#define nd_ra_code nd_ra_hdr.icmp6_code
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#define nd_ra_cksum nd_ra_hdr.icmp6_cksum
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#define nd_ra_curhoplimit nd_ra_hdr.icmp6_data8[0]
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#define nd_ra_flags_reserved nd_ra_hdr.icmp6_data8[1]
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#define ND_RA_FLAG_MANAGED 0x80
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#define ND_RA_FLAG_OTHER 0x40
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#define ND_RA_FLAG_HOME_AGENT 0x20
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#define ND_RA_FLAG_IPV6ONLY 0x02
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/*
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* Router preference values based on draft-draves-ipngwg-router-selection-01.
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* These are non-standard definitions.
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*/
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#define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */
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#define ND_RA_FLAG_RTPREF_HIGH 0x08 /* 00001000 */
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#define ND_RA_FLAG_RTPREF_MEDIUM 0x00 /* 00000000 */
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#define ND_RA_FLAG_RTPREF_LOW 0x18 /* 00011000 */
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#define ND_RA_FLAG_RTPREF_RSV 0x10 /* 00010000 */
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#define nd_ra_router_lifetime nd_ra_hdr.icmp6_data16[1]
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struct nd_neighbor_solicit { /* neighbor solicitation */
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struct icmp6_hdr nd_ns_hdr;
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nd_ipv6 nd_ns_target; /*target address */
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/* could be followed by options */
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};
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#define nd_ns_type nd_ns_hdr.icmp6_type
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#define nd_ns_code nd_ns_hdr.icmp6_code
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#define nd_ns_cksum nd_ns_hdr.icmp6_cksum
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#define nd_ns_reserved nd_ns_hdr.icmp6_data32[0]
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struct nd_neighbor_advert { /* neighbor advertisement */
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struct icmp6_hdr nd_na_hdr;
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nd_ipv6 nd_na_target; /* target address */
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/* could be followed by options */
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};
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#define nd_na_type nd_na_hdr.icmp6_type
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#define nd_na_code nd_na_hdr.icmp6_code
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#define nd_na_cksum nd_na_hdr.icmp6_cksum
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#define nd_na_flags_reserved nd_na_hdr.icmp6_data32[0]
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#define ND_NA_FLAG_ROUTER 0x80000000
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#define ND_NA_FLAG_SOLICITED 0x40000000
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#define ND_NA_FLAG_OVERRIDE 0x20000000
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struct nd_redirect { /* redirect */
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struct icmp6_hdr nd_rd_hdr;
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nd_ipv6 nd_rd_target; /* target address */
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nd_ipv6 nd_rd_dst; /* destination address */
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/* could be followed by options */
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};
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#define nd_rd_type nd_rd_hdr.icmp6_type
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#define nd_rd_code nd_rd_hdr.icmp6_code
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#define nd_rd_cksum nd_rd_hdr.icmp6_cksum
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#define nd_rd_reserved nd_rd_hdr.icmp6_data32[0]
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struct nd_opt_hdr { /* Neighbor discovery option header */
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nd_uint8_t nd_opt_type;
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nd_uint8_t nd_opt_len;
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/* followed by option specific data*/
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};
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#define ND_OPT_SOURCE_LINKADDR 1
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#define ND_OPT_TARGET_LINKADDR 2
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#define ND_OPT_PREFIX_INFORMATION 3
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#define ND_OPT_REDIRECTED_HEADER 4
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#define ND_OPT_MTU 5
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#define ND_OPT_ADVINTERVAL 7
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#define ND_OPT_HOMEAGENT_INFO 8
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#define ND_OPT_ROUTE_INFO 24 /* RFC4191 */
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#define ND_OPT_RDNSS 25
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#define ND_OPT_DNSSL 31
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struct nd_opt_prefix_info { /* prefix information */
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nd_uint8_t nd_opt_pi_type;
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nd_uint8_t nd_opt_pi_len;
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nd_uint8_t nd_opt_pi_prefix_len;
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nd_uint8_t nd_opt_pi_flags_reserved;
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nd_uint32_t nd_opt_pi_valid_time;
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nd_uint32_t nd_opt_pi_preferred_time;
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nd_uint32_t nd_opt_pi_reserved2;
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nd_ipv6 nd_opt_pi_prefix;
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};
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#define ND_OPT_PI_FLAG_ONLINK 0x80
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#define ND_OPT_PI_FLAG_AUTO 0x40
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#define ND_OPT_PI_FLAG_ROUTER 0x20 /*2292bis*/
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struct nd_opt_rd_hdr { /* redirected header */
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nd_uint8_t nd_opt_rh_type;
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nd_uint8_t nd_opt_rh_len;
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nd_uint16_t nd_opt_rh_reserved1;
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nd_uint32_t nd_opt_rh_reserved2;
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/* followed by IP header and data */
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};
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struct nd_opt_mtu { /* MTU option */
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nd_uint8_t nd_opt_mtu_type;
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nd_uint8_t nd_opt_mtu_len;
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nd_uint16_t nd_opt_mtu_reserved;
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nd_uint32_t nd_opt_mtu_mtu;
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};
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struct nd_opt_rdnss { /* RDNSS RFC 6106 5.1 */
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nd_uint8_t nd_opt_rdnss_type;
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nd_uint8_t nd_opt_rdnss_len;
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nd_uint16_t nd_opt_rdnss_reserved;
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nd_uint32_t nd_opt_rdnss_lifetime;
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nd_ipv6 nd_opt_rdnss_addr[1]; /* variable-length */
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};
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struct nd_opt_dnssl { /* DNSSL RFC 6106 5.2 */
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nd_uint8_t nd_opt_dnssl_type;
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nd_uint8_t nd_opt_dnssl_len;
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nd_uint16_t nd_opt_dnssl_reserved;
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nd_uint32_t nd_opt_dnssl_lifetime;
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/* followed by list of DNS search domains, variable-length */
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};
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struct nd_opt_advinterval { /* Advertisement interval option */
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nd_uint8_t nd_opt_adv_type;
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nd_uint8_t nd_opt_adv_len;
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nd_uint16_t nd_opt_adv_reserved;
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nd_uint32_t nd_opt_adv_interval;
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};
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struct nd_opt_homeagent_info { /* Home Agent info */
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nd_uint8_t nd_opt_hai_type;
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nd_uint8_t nd_opt_hai_len;
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nd_uint16_t nd_opt_hai_reserved;
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nd_uint16_t nd_opt_hai_preference;
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nd_uint16_t nd_opt_hai_lifetime;
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};
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struct nd_opt_route_info { /* route info */
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nd_uint8_t nd_opt_rti_type;
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nd_uint8_t nd_opt_rti_len;
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nd_uint8_t nd_opt_rti_prefixlen;
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nd_uint8_t nd_opt_rti_flags;
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nd_uint32_t nd_opt_rti_lifetime;
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/* prefix follows */
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};
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/*
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* icmp6 namelookup
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*/
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struct icmp6_namelookup {
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struct icmp6_hdr icmp6_nl_hdr;
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nd_byte icmp6_nl_nonce[8];
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nd_int32_t icmp6_nl_ttl;
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#if 0
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nd_uint8_t icmp6_nl_len;
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nd_byte icmp6_nl_name[3];
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#endif
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/* could be followed by options */
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};
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/*
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* icmp6 node information
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*/
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struct icmp6_nodeinfo {
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struct icmp6_hdr icmp6_ni_hdr;
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nd_byte icmp6_ni_nonce[8];
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/* could be followed by reply data */
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};
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#define ni_type icmp6_ni_hdr.icmp6_type
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#define ni_code icmp6_ni_hdr.icmp6_code
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#define ni_cksum icmp6_ni_hdr.icmp6_cksum
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#define ni_qtype icmp6_ni_hdr.icmp6_data16[0]
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#define ni_flags icmp6_ni_hdr.icmp6_data16[1]
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#define NI_QTYPE_NOOP 0 /* NOOP */
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#define NI_QTYPE_SUPTYPES 1 /* Supported Qtypes (drafts up to 09) */
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#define NI_QTYPE_FQDN 2 /* FQDN (draft 04) */
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#define NI_QTYPE_DNSNAME 2 /* DNS Name */
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#define NI_QTYPE_NODEADDR 3 /* Node Addresses */
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#define NI_QTYPE_IPV4ADDR 4 /* IPv4 Addresses */
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/* network endian */
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#define NI_SUPTYPE_FLAG_COMPRESS ((uint16_t)htons(0x1))
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#define NI_FQDN_FLAG_VALIDTTL ((uint16_t)htons(0x1))
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/* network endian */
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#define NI_NODEADDR_FLAG_TRUNCATE ((uint16_t)htons(0x1))
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#define NI_NODEADDR_FLAG_ALL ((uint16_t)htons(0x2))
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#define NI_NODEADDR_FLAG_COMPAT ((uint16_t)htons(0x4))
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#define NI_NODEADDR_FLAG_LINKLOCAL ((uint16_t)htons(0x8))
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#define NI_NODEADDR_FLAG_SITELOCAL ((uint16_t)htons(0x10))
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#define NI_NODEADDR_FLAG_GLOBAL ((uint16_t)htons(0x20))
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#define NI_NODEADDR_FLAG_ANYCAST ((uint16_t)htons(0x40)) /* just experimental. not in spec */
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struct ni_reply_fqdn {
|
|
nd_uint32_t ni_fqdn_ttl; /* TTL */
|
|
nd_uint8_t ni_fqdn_namelen; /* length in octets of the FQDN */
|
|
nd_byte ni_fqdn_name[3]; /* XXX: alignment */
|
|
};
|
|
|
|
/*
|
|
* Router Renumbering. as router-renum-08.txt
|
|
*/
|
|
struct icmp6_router_renum { /* router renumbering header */
|
|
struct icmp6_hdr rr_hdr;
|
|
nd_uint8_t rr_segnum;
|
|
nd_uint8_t rr_flags;
|
|
nd_uint16_t rr_maxdelay;
|
|
nd_uint32_t rr_reserved;
|
|
};
|
|
#define ICMP6_RR_FLAGS_TEST 0x80
|
|
#define ICMP6_RR_FLAGS_REQRESULT 0x40
|
|
#define ICMP6_RR_FLAGS_FORCEAPPLY 0x20
|
|
#define ICMP6_RR_FLAGS_SPECSITE 0x10
|
|
#define ICMP6_RR_FLAGS_PREVDONE 0x08
|
|
|
|
#define rr_type rr_hdr.icmp6_type
|
|
#define rr_code rr_hdr.icmp6_code
|
|
#define rr_cksum rr_hdr.icmp6_cksum
|
|
#define rr_seqnum rr_hdr.icmp6_data32[0]
|
|
|
|
struct rr_pco_match { /* match prefix part */
|
|
nd_uint8_t rpm_code;
|
|
nd_uint8_t rpm_len;
|
|
nd_uint8_t rpm_ordinal;
|
|
nd_uint8_t rpm_matchlen;
|
|
nd_uint8_t rpm_minlen;
|
|
nd_uint8_t rpm_maxlen;
|
|
nd_uint16_t rpm_reserved;
|
|
nd_ipv6 rpm_prefix;
|
|
};
|
|
|
|
#define RPM_PCO_ADD 1
|
|
#define RPM_PCO_CHANGE 2
|
|
#define RPM_PCO_SETGLOBAL 3
|
|
#define RPM_PCO_MAX 4
|
|
|
|
struct rr_pco_use { /* use prefix part */
|
|
nd_uint8_t rpu_uselen;
|
|
nd_uint8_t rpu_keeplen;
|
|
nd_uint8_t rpu_ramask;
|
|
nd_uint8_t rpu_raflags;
|
|
nd_uint32_t rpu_vltime;
|
|
nd_uint32_t rpu_pltime;
|
|
nd_uint32_t rpu_flags;
|
|
nd_ipv6 rpu_prefix;
|
|
};
|
|
#define ICMP6_RR_PCOUSE_RAFLAGS_ONLINK 0x80
|
|
#define ICMP6_RR_PCOUSE_RAFLAGS_AUTO 0x40
|
|
|
|
/* network endian */
|
|
#define ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME ((uint32_t)htonl(0x80000000))
|
|
#define ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME ((uint32_t)htonl(0x40000000))
|
|
|
|
struct rr_result { /* router renumbering result message */
|
|
nd_uint16_t rrr_flags;
|
|
nd_uint8_t rrr_ordinal;
|
|
nd_uint8_t rrr_matchedlen;
|
|
nd_uint32_t rrr_ifid;
|
|
nd_ipv6 rrr_prefix;
|
|
};
|
|
/* network endian */
|
|
#define ICMP6_RR_RESULT_FLAGS_OOB ((uint16_t)htons(0x0002))
|
|
#define ICMP6_RR_RESULT_FLAGS_FORBIDDEN ((uint16_t)htons(0x0001))
|
|
|
|
static const char *get_rtpref(u_int);
|
|
static const char *get_lifetime(uint32_t);
|
|
static void print_lladdr(netdissect_options *ndo, const u_char *, size_t);
|
|
static int icmp6_opt_print(netdissect_options *ndo, const u_char *, int);
|
|
static void mld6_print(netdissect_options *ndo, const u_char *);
|
|
static void mldv2_report_print(netdissect_options *ndo, const u_char *, u_int);
|
|
static void mldv2_query_print(netdissect_options *ndo, const u_char *, u_int);
|
|
static const struct udphdr *get_upperlayer(netdissect_options *ndo, const u_char *, u_int *);
|
|
static void dnsname_print(netdissect_options *ndo, const u_char *, const u_char *);
|
|
static void icmp6_nodeinfo_print(netdissect_options *ndo, u_int, const u_char *, const u_char *);
|
|
static void icmp6_rrenum_print(netdissect_options *ndo, const u_char *, const u_char *);
|
|
|
|
#ifndef abs
|
|
#define abs(a) ((0 < (a)) ? (a) : -(a))
|
|
#endif
|
|
|
|
/*
|
|
* DIO: Updated to RFC6550, as published in 2012: section 6. (page 30)
|
|
*/
|
|
|
|
#define ND_RPL_MESSAGE 155 /* 0x9B */
|
|
|
|
enum ND_RPL_CODE {
|
|
ND_RPL_DAG_IS=0x00,
|
|
ND_RPL_DAG_IO=0x01,
|
|
ND_RPL_DAO =0x02,
|
|
ND_RPL_DAO_ACK=0x03,
|
|
ND_RPL_SEC_DAG_IS = 0x80,
|
|
ND_RPL_SEC_DAG_IO = 0x81,
|
|
ND_RPL_SEC_DAG = 0x82,
|
|
ND_RPL_SEC_DAG_ACK= 0x83,
|
|
ND_RPL_SEC_CONSIST= 0x8A
|
|
};
|
|
|
|
enum ND_RPL_DIO_FLAGS {
|
|
ND_RPL_DIO_GROUNDED = 0x80,
|
|
ND_RPL_DIO_DATRIG = 0x40,
|
|
ND_RPL_DIO_DASUPPORT= 0x20,
|
|
ND_RPL_DIO_RES4 = 0x10,
|
|
ND_RPL_DIO_RES3 = 0x08,
|
|
ND_RPL_DIO_PRF_MASK = 0x07 /* 3-bit preference */
|
|
};
|
|
|
|
#define DAGID_LEN 16
|
|
|
|
/* section 6 of draft-ietf-roll-rpl-19 */
|
|
struct nd_rpl_security {
|
|
nd_uint8_t rpl_sec_t_reserved; /* bit 7 is T-bit */
|
|
nd_uint8_t rpl_sec_algo;
|
|
nd_uint16_t rpl_sec_kim_lvl_flags; /* bit 15/14, KIM */
|
|
/* bit 10-8, LVL, bit 7-0 flags */
|
|
nd_uint32_t rpl_sec_counter;
|
|
#if 0
|
|
nd_byte rpl_sec_ki[0]; /* depends upon kim */
|
|
#endif
|
|
};
|
|
|
|
/* section 6.2.1, DODAG Information Solication (DIS_IS) */
|
|
struct nd_rpl_dis_is {
|
|
nd_uint8_t rpl_dis_flags;
|
|
nd_uint8_t rpl_dis_reserved;
|
|
#if 0
|
|
nd_byte rpl_dis_options[0];
|
|
#endif
|
|
};
|
|
|
|
/* section 6.3.1, DODAG Information Object (DIO) */
|
|
struct nd_rpl_dio {
|
|
nd_uint8_t rpl_instanceid;
|
|
nd_uint8_t rpl_version;
|
|
nd_uint16_t rpl_dagrank;
|
|
nd_uint8_t rpl_mopprf; /* bit 7=G, 5-3=MOP, 2-0=PRF */
|
|
nd_uint8_t rpl_dtsn; /* Dest. Advertisement Trigger Sequence Number */
|
|
nd_uint8_t rpl_flags; /* no flags defined yet */
|
|
nd_uint8_t rpl_resv1;
|
|
nd_byte rpl_dagid[DAGID_LEN];
|
|
};
|
|
#define RPL_DIO_GROUND_FLAG 0x80
|
|
#define RPL_DIO_MOP_SHIFT 3
|
|
#define RPL_DIO_MOP_MASK (7 << RPL_DIO_MOP_SHIFT)
|
|
#define RPL_DIO_PRF_SHIFT 0
|
|
#define RPL_DIO_PRF_MASK (7 << RPL_DIO_PRF_SHIFT)
|
|
#define RPL_DIO_GROUNDED(X) ((X)&RPL_DIO_GROUND_FLAG)
|
|
#define RPL_DIO_MOP(X) (enum RPL_DIO_MOP)(((X)&RPL_DIO_MOP_MASK) >> RPL_DIO_MOP_SHIFT)
|
|
#define RPL_DIO_PRF(X) (((X)&RPL_DIO_PRF_MASK) >> RPL_DIO_PRF_SHIFT)
|
|
|
|
enum RPL_DIO_MOP {
|
|
RPL_DIO_NONSTORING= 0x0,
|
|
RPL_DIO_STORING = 0x1,
|
|
RPL_DIO_NONSTORING_MULTICAST = 0x2,
|
|
RPL_DIO_STORING_MULTICAST = 0x3
|
|
};
|
|
|
|
enum RPL_SUBOPT {
|
|
RPL_OPT_PAD1 = 0,
|
|
RPL_OPT_PADN = 1,
|
|
RPL_DIO_METRICS = 2,
|
|
RPL_DIO_ROUTINGINFO = 3,
|
|
RPL_DIO_CONFIG = 4,
|
|
RPL_DAO_RPLTARGET = 5,
|
|
RPL_DAO_TRANSITINFO = 6,
|
|
RPL_DIO_DESTPREFIX = 8,
|
|
RPL_DAO_RPLTARGET_DESC=9
|
|
};
|
|
|
|
struct rpl_genoption {
|
|
nd_uint8_t rpl_dio_type;
|
|
nd_uint8_t rpl_dio_len; /* suboption length, not including type/len */
|
|
};
|
|
#define RPL_GENOPTION_LEN 2
|
|
|
|
#define RPL_DIO_LIFETIME_INFINITE 0xffffffff
|
|
#define RPL_DIO_LIFETIME_DISCONNECT 0
|
|
|
|
struct rpl_dio_destprefix {
|
|
nd_uint8_t rpl_dio_type;
|
|
nd_uint8_t rpl_dio_len;
|
|
nd_uint8_t rpl_dio_prefixlen; /* in bits */
|
|
nd_uint8_t rpl_dio_prf; /* flags, including Route Preference */
|
|
nd_uint32_t rpl_dio_prefixlifetime; /* in seconds */
|
|
#if 0
|
|
nd_byte rpl_dio_prefix[0]; /* variable number of bytes */
|
|
#endif
|
|
};
|
|
|
|
/* section 6.4.1, DODAG Information Object (DIO) */
|
|
struct nd_rpl_dao {
|
|
nd_uint8_t rpl_instanceid;
|
|
nd_uint8_t rpl_flags; /* bit 7=K, 6=D */
|
|
nd_uint8_t rpl_resv;
|
|
nd_uint8_t rpl_daoseq;
|
|
nd_byte rpl_dagid[DAGID_LEN]; /* present when D set. */
|
|
};
|
|
#define ND_RPL_DAO_MIN_LEN 4 /* length without DAGID */
|
|
|
|
/* indicates if this DAO is to be acK'ed */
|
|
#define RPL_DAO_K_SHIFT 7
|
|
#define RPL_DAO_K_MASK (1 << RPL_DAO_K_SHIFT)
|
|
#define RPL_DAO_K(X) (((X)&RPL_DAO_K_MASK) >> RPL_DAO_K_SHIFT)
|
|
|
|
/* indicates if the DAGID is present */
|
|
#define RPL_DAO_D_SHIFT 6
|
|
#define RPL_DAO_D_MASK (1 << RPL_DAO_D_SHIFT)
|
|
#define RPL_DAO_D(X) (((X)&RPL_DAO_D_MASK) >> RPL_DAO_D_SHIFT)
|
|
|
|
struct rpl_dao_target {
|
|
nd_uint8_t rpl_dao_type;
|
|
nd_uint8_t rpl_dao_len;
|
|
nd_uint8_t rpl_dao_flags; /* unused */
|
|
nd_uint8_t rpl_dao_prefixlen; /* in bits */
|
|
#if 0
|
|
nd_byte rpl_dao_prefix[0]; /* variable number of bytes */
|
|
#endif
|
|
};
|
|
|
|
/* section 6.5.1, Destination Advertisement Object Acknowledgement (DAO-ACK) */
|
|
struct nd_rpl_daoack {
|
|
nd_uint8_t rpl_instanceid;
|
|
nd_uint8_t rpl_flags; /* bit 7=D */
|
|
nd_uint8_t rpl_daoseq;
|
|
nd_uint8_t rpl_status;
|
|
nd_byte rpl_dagid[DAGID_LEN]; /* present when D set. */
|
|
};
|
|
#define ND_RPL_DAOACK_MIN_LEN 4 /* length without DAGID */
|
|
/* indicates if the DAGID is present */
|
|
#define RPL_DAOACK_D_SHIFT 7
|
|
#define RPL_DAOACK_D_MASK (1 << RPL_DAOACK_D_SHIFT)
|
|
#define RPL_DAOACK_D(X) (((X)&RPL_DAOACK_D_MASK) >> RPL_DAOACK_D_SHIFT)
|
|
|
|
static const struct tok icmp6_type_values[] = {
|
|
{ ICMP6_DST_UNREACH, "destination unreachable"},
|
|
{ ICMP6_PACKET_TOO_BIG, "packet too big"},
|
|
{ ICMP6_TIME_EXCEEDED, "time exceeded in-transit"},
|
|
{ ICMP6_PARAM_PROB, "parameter problem"},
|
|
{ ICMP6_ECHO_REQUEST, "echo request"},
|
|
{ ICMP6_ECHO_REPLY, "echo reply"},
|
|
{ MLD6_LISTENER_QUERY, "multicast listener query"},
|
|
{ MLD6_LISTENER_REPORT, "multicast listener report"},
|
|
{ MLD6_LISTENER_DONE, "multicast listener done"},
|
|
{ ND_ROUTER_SOLICIT, "router solicitation"},
|
|
{ ND_ROUTER_ADVERT, "router advertisement"},
|
|
{ ND_NEIGHBOR_SOLICIT, "neighbor solicitation"},
|
|
{ ND_NEIGHBOR_ADVERT, "neighbor advertisement"},
|
|
{ ND_REDIRECT, "redirect"},
|
|
{ ICMP6_ROUTER_RENUMBERING, "router renumbering"},
|
|
{ IND_SOLICIT, "inverse neighbor solicitation"},
|
|
{ IND_ADVERT, "inverse neighbor advertisement"},
|
|
{ MLDV2_LISTENER_REPORT, "multicast listener report v2"},
|
|
{ ICMP6_HADISCOV_REQUEST, "ha discovery request"},
|
|
{ ICMP6_HADISCOV_REPLY, "ha discovery reply"},
|
|
{ ICMP6_MOBILEPREFIX_SOLICIT, "mobile router solicitation"},
|
|
{ ICMP6_MOBILEPREFIX_ADVERT, "mobile router advertisement"},
|
|
{ ICMP6_WRUREQUEST, "who-are-you request"},
|
|
{ ICMP6_WRUREPLY, "who-are-you reply"},
|
|
{ ICMP6_NI_QUERY, "node information query"},
|
|
{ ICMP6_NI_REPLY, "node information reply"},
|
|
{ MLD6_MTRACE, "mtrace message"},
|
|
{ MLD6_MTRACE_RESP, "mtrace response"},
|
|
{ ND_RPL_MESSAGE, "RPL"},
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const struct tok icmp6_dst_unreach_code_values[] = {
|
|
{ ICMP6_DST_UNREACH_NOROUTE, "unreachable route" },
|
|
{ ICMP6_DST_UNREACH_ADMIN, " unreachable prohibited"},
|
|
{ ICMP6_DST_UNREACH_BEYONDSCOPE, "beyond scope"},
|
|
{ ICMP6_DST_UNREACH_ADDR, "unreachable address"},
|
|
{ ICMP6_DST_UNREACH_NOPORT, "unreachable port"},
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const struct tok icmp6_opt_pi_flag_values[] = {
|
|
{ ND_OPT_PI_FLAG_ONLINK, "onlink" },
|
|
{ ND_OPT_PI_FLAG_AUTO, "auto" },
|
|
{ ND_OPT_PI_FLAG_ROUTER, "router" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const struct tok icmp6_opt_ra_flag_values[] = {
|
|
{ ND_RA_FLAG_MANAGED, "managed" },
|
|
{ ND_RA_FLAG_OTHER, "other stateful"},
|
|
{ ND_RA_FLAG_HOME_AGENT, "home agent"},
|
|
{ ND_RA_FLAG_IPV6ONLY, "ipv6 only"},
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const struct tok icmp6_nd_na_flag_values[] = {
|
|
{ ND_NA_FLAG_ROUTER, "router" },
|
|
{ ND_NA_FLAG_SOLICITED, "solicited" },
|
|
{ ND_NA_FLAG_OVERRIDE, "override" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
|
|
static const struct tok icmp6_opt_values[] = {
|
|
{ ND_OPT_SOURCE_LINKADDR, "source link-address"},
|
|
{ ND_OPT_TARGET_LINKADDR, "destination link-address"},
|
|
{ ND_OPT_PREFIX_INFORMATION, "prefix info"},
|
|
{ ND_OPT_REDIRECTED_HEADER, "redirected header"},
|
|
{ ND_OPT_MTU, "mtu"},
|
|
{ ND_OPT_RDNSS, "rdnss"},
|
|
{ ND_OPT_DNSSL, "dnssl"},
|
|
{ ND_OPT_ADVINTERVAL, "advertisement interval"},
|
|
{ ND_OPT_HOMEAGENT_INFO, "homeagent information"},
|
|
{ ND_OPT_ROUTE_INFO, "route info"},
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/* mldv2 report types */
|
|
static const struct tok mldv2report2str[] = {
|
|
{ 1, "is_in" },
|
|
{ 2, "is_ex" },
|
|
{ 3, "to_in" },
|
|
{ 4, "to_ex" },
|
|
{ 5, "allow" },
|
|
{ 6, "block" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const char *
|
|
get_rtpref(u_int v)
|
|
{
|
|
static const char *rtpref_str[] = {
|
|
"medium", /* 00 */
|
|
"high", /* 01 */
|
|
"rsv", /* 10 */
|
|
"low" /* 11 */
|
|
};
|
|
|
|
return rtpref_str[((v & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff];
|
|
}
|
|
|
|
static const char *
|
|
get_lifetime(uint32_t v)
|
|
{
|
|
static char buf[20];
|
|
|
|
if (v == (uint32_t)~0UL)
|
|
return "infinity";
|
|
else {
|
|
snprintf(buf, sizeof(buf), "%us", v);
|
|
return buf;
|
|
}
|
|
}
|
|
|
|
static void
|
|
print_lladdr(netdissect_options *ndo, const uint8_t *p, size_t l)
|
|
{
|
|
const uint8_t *ep, *q;
|
|
|
|
q = p;
|
|
ep = p + l;
|
|
while (l > 0 && q < ep) {
|
|
if (q > p)
|
|
ND_PRINT(":");
|
|
ND_PRINT("%02x", GET_U_1(q));
|
|
q++;
|
|
l--;
|
|
}
|
|
}
|
|
|
|
static uint16_t icmp6_cksum(netdissect_options *ndo, const struct ip6_hdr *ip6,
|
|
const struct icmp6_hdr *icp, u_int len)
|
|
{
|
|
return nextproto6_cksum(ndo, ip6, (const uint8_t *)(const void *)icp, len, len,
|
|
IPPROTO_ICMPV6);
|
|
}
|
|
|
|
static const struct tok rpl_mop_values[] = {
|
|
{ RPL_DIO_NONSTORING, "nonstoring"},
|
|
{ RPL_DIO_STORING, "storing"},
|
|
{ RPL_DIO_NONSTORING_MULTICAST, "nonstoring-multicast"},
|
|
{ RPL_DIO_STORING_MULTICAST, "storing-multicast"},
|
|
{ 0, NULL},
|
|
};
|
|
|
|
static const struct tok rpl_subopt_values[] = {
|
|
{ RPL_OPT_PAD1, "pad1"},
|
|
{ RPL_OPT_PADN, "padN"},
|
|
{ RPL_DIO_METRICS, "metrics"},
|
|
{ RPL_DIO_ROUTINGINFO, "routinginfo"},
|
|
{ RPL_DIO_CONFIG, "config"},
|
|
{ RPL_DAO_RPLTARGET, "rpltarget"},
|
|
{ RPL_DAO_TRANSITINFO, "transitinfo"},
|
|
{ RPL_DIO_DESTPREFIX, "destprefix"},
|
|
{ RPL_DAO_RPLTARGET_DESC, "rpltargetdesc"},
|
|
{ 0, NULL},
|
|
};
|
|
|
|
static void
|
|
rpl_printopts(netdissect_options *ndo, const uint8_t *opts, u_int length)
|
|
{
|
|
const struct rpl_genoption *opt;
|
|
uint8_t dio_type;
|
|
u_int optlen;
|
|
|
|
while (length != 0) {
|
|
opt = (const struct rpl_genoption *)opts;
|
|
dio_type = GET_U_1(opt->rpl_dio_type);
|
|
if (dio_type == RPL_OPT_PAD1) {
|
|
optlen = 1;
|
|
ND_PRINT(" opt:pad1");
|
|
} else {
|
|
if (length < RPL_GENOPTION_LEN)
|
|
goto trunc;
|
|
optlen = GET_U_1(opt->rpl_dio_len)+RPL_GENOPTION_LEN;
|
|
ND_PRINT(" opt:%s len:%u ",
|
|
tok2str(rpl_subopt_values, "subopt:%u", dio_type),
|
|
optlen);
|
|
ND_TCHECK_LEN(opt, optlen);
|
|
if (length < optlen)
|
|
goto trunc;
|
|
if (ndo->ndo_vflag > 2) {
|
|
hex_print(ndo,
|
|
" ",
|
|
opts + RPL_GENOPTION_LEN, /* content of DIO option */
|
|
optlen - RPL_GENOPTION_LEN);
|
|
}
|
|
}
|
|
opts += optlen;
|
|
length -= optlen;
|
|
}
|
|
return;
|
|
trunc:
|
|
nd_print_trunc(ndo);
|
|
}
|
|
|
|
static void
|
|
rpl_dio_print(netdissect_options *ndo,
|
|
const u_char *bp, u_int length)
|
|
{
|
|
const struct nd_rpl_dio *dio = (const struct nd_rpl_dio *)bp;
|
|
const char *dagid_str;
|
|
|
|
ND_TCHECK_SIZE(dio);
|
|
dagid_str = ip6addr_string (ndo, dio->rpl_dagid);
|
|
|
|
ND_PRINT(" [dagid:%s,seq:%u,instance:%u,rank:%u,%smop:%s,prf:%u]",
|
|
dagid_str,
|
|
GET_U_1(dio->rpl_dtsn),
|
|
GET_U_1(dio->rpl_instanceid),
|
|
GET_BE_U_2(dio->rpl_dagrank),
|
|
RPL_DIO_GROUNDED(GET_U_1(dio->rpl_mopprf)) ? "grounded,":"",
|
|
tok2str(rpl_mop_values, "mop%u", RPL_DIO_MOP(GET_U_1(dio->rpl_mopprf))),
|
|
RPL_DIO_PRF(GET_U_1(dio->rpl_mopprf)));
|
|
|
|
if(ndo->ndo_vflag > 1) {
|
|
rpl_printopts(ndo, bp + sizeof(struct nd_rpl_dio),
|
|
length - sizeof(struct nd_rpl_dio));
|
|
}
|
|
return;
|
|
trunc:
|
|
nd_print_trunc(ndo);
|
|
}
|
|
|
|
static void
|
|
rpl_dao_print(netdissect_options *ndo,
|
|
const u_char *bp, u_int length)
|
|
{
|
|
const struct nd_rpl_dao *dao = (const struct nd_rpl_dao *)bp;
|
|
const char *dagid_str = "<elided>";
|
|
uint8_t rpl_flags;
|
|
|
|
ND_TCHECK_SIZE(dao);
|
|
if (length < ND_RPL_DAO_MIN_LEN)
|
|
goto tooshort;
|
|
|
|
bp += ND_RPL_DAO_MIN_LEN;
|
|
length -= ND_RPL_DAO_MIN_LEN;
|
|
rpl_flags = GET_U_1(dao->rpl_flags);
|
|
if(RPL_DAO_D(rpl_flags)) {
|
|
ND_TCHECK_LEN(dao->rpl_dagid, DAGID_LEN);
|
|
if (length < DAGID_LEN)
|
|
goto tooshort;
|
|
dagid_str = ip6addr_string (ndo, dao->rpl_dagid);
|
|
bp += DAGID_LEN;
|
|
length -= DAGID_LEN;
|
|
}
|
|
|
|
ND_PRINT(" [dagid:%s,seq:%u,instance:%u%s%s,%02x]",
|
|
dagid_str,
|
|
GET_U_1(dao->rpl_daoseq),
|
|
GET_U_1(dao->rpl_instanceid),
|
|
RPL_DAO_K(rpl_flags) ? ",acK":"",
|
|
RPL_DAO_D(rpl_flags) ? ",Dagid":"",
|
|
rpl_flags);
|
|
|
|
if(ndo->ndo_vflag > 1) {
|
|
rpl_printopts(ndo, bp, length);
|
|
}
|
|
return;
|
|
|
|
trunc:
|
|
nd_print_trunc(ndo);
|
|
return;
|
|
|
|
tooshort:
|
|
ND_PRINT(" [|length too short]");
|
|
}
|
|
|
|
static void
|
|
rpl_daoack_print(netdissect_options *ndo,
|
|
const u_char *bp, u_int length)
|
|
{
|
|
const struct nd_rpl_daoack *daoack = (const struct nd_rpl_daoack *)bp;
|
|
const char *dagid_str = "<elided>";
|
|
|
|
ND_TCHECK_LEN(daoack, ND_RPL_DAOACK_MIN_LEN);
|
|
if (length < ND_RPL_DAOACK_MIN_LEN)
|
|
goto tooshort;
|
|
|
|
bp += ND_RPL_DAOACK_MIN_LEN;
|
|
length -= ND_RPL_DAOACK_MIN_LEN;
|
|
if(RPL_DAOACK_D(GET_U_1(daoack->rpl_flags))) {
|
|
ND_TCHECK_LEN(daoack->rpl_dagid, DAGID_LEN);
|
|
if (length < DAGID_LEN)
|
|
goto tooshort;
|
|
dagid_str = ip6addr_string (ndo, daoack->rpl_dagid);
|
|
bp += DAGID_LEN;
|
|
length -= DAGID_LEN;
|
|
}
|
|
|
|
ND_PRINT(" [dagid:%s,seq:%u,instance:%u,status:%u]",
|
|
dagid_str,
|
|
GET_U_1(daoack->rpl_daoseq),
|
|
GET_U_1(daoack->rpl_instanceid),
|
|
GET_U_1(daoack->rpl_status));
|
|
|
|
/* no officially defined options for DAOACK, but print any we find */
|
|
if(ndo->ndo_vflag > 1) {
|
|
rpl_printopts(ndo, bp, length);
|
|
}
|
|
return;
|
|
|
|
trunc:
|
|
nd_print_trunc(ndo);
|
|
return;
|
|
|
|
tooshort:
|
|
ND_PRINT(" [|dao-length too short]");
|
|
}
|
|
|
|
static void
|
|
rpl_print(netdissect_options *ndo,
|
|
uint8_t icmp6_code,
|
|
const u_char *bp, u_int length)
|
|
{
|
|
int secured = icmp6_code & 0x80;
|
|
int basecode= icmp6_code & 0x7f;
|
|
|
|
if(secured) {
|
|
ND_PRINT(", (SEC) [worktodo]");
|
|
/* XXX
|
|
* the next header pointer needs to move forward to
|
|
* skip the secure part.
|
|
*/
|
|
return;
|
|
} else {
|
|
ND_PRINT(", (CLR)");
|
|
}
|
|
|
|
switch(basecode) {
|
|
case ND_RPL_DAG_IS:
|
|
ND_PRINT("DODAG Information Solicitation");
|
|
if(ndo->ndo_vflag) {
|
|
}
|
|
break;
|
|
case ND_RPL_DAG_IO:
|
|
ND_PRINT("DODAG Information Object");
|
|
if(ndo->ndo_vflag) {
|
|
rpl_dio_print(ndo, bp, length);
|
|
}
|
|
break;
|
|
case ND_RPL_DAO:
|
|
ND_PRINT("Destination Advertisement Object");
|
|
if(ndo->ndo_vflag) {
|
|
rpl_dao_print(ndo, bp, length);
|
|
}
|
|
break;
|
|
case ND_RPL_DAO_ACK:
|
|
ND_PRINT("Destination Advertisement Object Ack");
|
|
if(ndo->ndo_vflag) {
|
|
rpl_daoack_print(ndo, bp, length);
|
|
}
|
|
break;
|
|
default:
|
|
ND_PRINT("RPL message, unknown code %u",icmp6_code);
|
|
break;
|
|
}
|
|
return;
|
|
|
|
#if 0
|
|
trunc:
|
|
nd_print_trunc(ndo);
|
|
return;
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
void
|
|
icmp6_print(netdissect_options *ndo,
|
|
const u_char *bp, u_int length, const u_char *bp2, int fragmented)
|
|
{
|
|
const struct icmp6_hdr *dp;
|
|
uint8_t icmp6_type, icmp6_code;
|
|
const struct ip6_hdr *ip;
|
|
const struct ip6_hdr *oip;
|
|
const struct udphdr *ouh;
|
|
uint16_t dport;
|
|
const u_char *ep;
|
|
u_int prot;
|
|
|
|
ndo->ndo_protocol = "icmp6";
|
|
dp = (const struct icmp6_hdr *)bp;
|
|
ip = (const struct ip6_hdr *)bp2;
|
|
oip = (const struct ip6_hdr *)(dp + 1);
|
|
/* 'ep' points to the end of available data. */
|
|
ep = ndo->ndo_snapend;
|
|
if (length == 0) {
|
|
ND_PRINT("ICMP6, length 0");
|
|
nd_print_invalid(ndo);
|
|
return;
|
|
}
|
|
|
|
if (ndo->ndo_vflag && !fragmented) {
|
|
uint16_t sum, udp_sum;
|
|
|
|
if (ND_TTEST_LEN(bp, length)) {
|
|
udp_sum = GET_BE_U_2(dp->icmp6_cksum);
|
|
sum = icmp6_cksum(ndo, ip, dp, length);
|
|
if (sum != 0)
|
|
ND_PRINT("[bad icmp6 cksum 0x%04x -> 0x%04x!] ",
|
|
udp_sum,
|
|
in_cksum_shouldbe(udp_sum, sum));
|
|
else
|
|
ND_PRINT("[icmp6 sum ok] ");
|
|
}
|
|
}
|
|
|
|
icmp6_type = GET_U_1(dp->icmp6_type);
|
|
ND_PRINT("ICMP6, %s", tok2str(icmp6_type_values,"unknown icmp6 type (%u)",icmp6_type));
|
|
|
|
/* display cosmetics: print the packet length for printer that use the vflag now */
|
|
if (ndo->ndo_vflag && (icmp6_type == ND_ROUTER_SOLICIT ||
|
|
icmp6_type == ND_ROUTER_ADVERT ||
|
|
icmp6_type == ND_NEIGHBOR_ADVERT ||
|
|
icmp6_type == ND_NEIGHBOR_SOLICIT ||
|
|
icmp6_type == ND_REDIRECT ||
|
|
icmp6_type == ICMP6_HADISCOV_REPLY ||
|
|
icmp6_type == ICMP6_MOBILEPREFIX_ADVERT ))
|
|
ND_PRINT(", length %u", length);
|
|
|
|
icmp6_code = GET_U_1(dp->icmp6_code);
|
|
|
|
switch (icmp6_type) {
|
|
case ICMP6_DST_UNREACH:
|
|
ND_PRINT(", %s", tok2str(icmp6_dst_unreach_code_values,"unknown unreach code (%u)",icmp6_code));
|
|
switch (icmp6_code) {
|
|
|
|
case ICMP6_DST_UNREACH_NOROUTE: /* fall through */
|
|
case ICMP6_DST_UNREACH_ADMIN:
|
|
case ICMP6_DST_UNREACH_ADDR:
|
|
ND_PRINT(" %s",GET_IP6ADDR_STRING(oip->ip6_dst));
|
|
break;
|
|
case ICMP6_DST_UNREACH_BEYONDSCOPE:
|
|
ND_PRINT(" %s, source address %s",
|
|
GET_IP6ADDR_STRING(oip->ip6_dst),
|
|
GET_IP6ADDR_STRING(oip->ip6_src));
|
|
break;
|
|
case ICMP6_DST_UNREACH_NOPORT:
|
|
if ((ouh = get_upperlayer(ndo, (const u_char *)oip, &prot))
|
|
== NULL)
|
|
goto trunc;
|
|
|
|
dport = GET_BE_U_2(ouh->uh_dport);
|
|
switch (prot) {
|
|
case IPPROTO_TCP:
|
|
ND_PRINT(", %s tcp port %s",
|
|
GET_IP6ADDR_STRING(oip->ip6_dst),
|
|
tcpport_string(ndo, dport));
|
|
break;
|
|
case IPPROTO_UDP:
|
|
ND_PRINT(", %s udp port %s",
|
|
GET_IP6ADDR_STRING(oip->ip6_dst),
|
|
udpport_string(ndo, dport));
|
|
break;
|
|
default:
|
|
ND_PRINT(", %s protocol %u port %u unreachable",
|
|
GET_IP6ADDR_STRING(oip->ip6_dst),
|
|
prot, dport);
|
|
break;
|
|
}
|
|
break;
|
|
default:
|
|
if (ndo->ndo_vflag <= 1) {
|
|
print_unknown_data(ndo, bp,"\n\t",length);
|
|
return;
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
case ICMP6_PACKET_TOO_BIG:
|
|
ND_PRINT(", mtu %u", GET_BE_U_4(dp->icmp6_mtu));
|
|
break;
|
|
case ICMP6_TIME_EXCEEDED:
|
|
switch (icmp6_code) {
|
|
case ICMP6_TIME_EXCEED_TRANSIT:
|
|
ND_PRINT(" for %s",
|
|
GET_IP6ADDR_STRING(oip->ip6_dst));
|
|
break;
|
|
case ICMP6_TIME_EXCEED_REASSEMBLY:
|
|
ND_PRINT(" (reassembly)");
|
|
break;
|
|
default:
|
|
ND_PRINT(", unknown code (%u)", icmp6_code);
|
|
break;
|
|
}
|
|
break;
|
|
case ICMP6_PARAM_PROB:
|
|
ND_TCHECK_16(oip->ip6_dst);
|
|
switch (icmp6_code) {
|
|
case ICMP6_PARAMPROB_HEADER:
|
|
ND_PRINT(", erroneous - octet %u",
|
|
GET_BE_U_4(dp->icmp6_pptr));
|
|
break;
|
|
case ICMP6_PARAMPROB_NEXTHEADER:
|
|
ND_PRINT(", next header - octet %u",
|
|
GET_BE_U_4(dp->icmp6_pptr));
|
|
break;
|
|
case ICMP6_PARAMPROB_OPTION:
|
|
ND_PRINT(", option - octet %u",
|
|
GET_BE_U_4(dp->icmp6_pptr));
|
|
break;
|
|
case ICMP6_PARAMPROB_FRAGHDRCHAIN:
|
|
ND_PRINT(", incomplete header chain - octet %u",
|
|
GET_BE_U_4(dp->icmp6_pptr));
|
|
break;
|
|
default:
|
|
ND_PRINT(", code-#%u",
|
|
icmp6_code);
|
|
break;
|
|
}
|
|
break;
|
|
case ICMP6_ECHO_REQUEST:
|
|
case ICMP6_ECHO_REPLY:
|
|
ND_PRINT(", id %u, seq %u", GET_BE_U_2(dp->icmp6_id),
|
|
GET_BE_U_2(dp->icmp6_seq));
|
|
break;
|
|
case ICMP6_MEMBERSHIP_QUERY:
|
|
if (length == MLD_MINLEN) {
|
|
mld6_print(ndo, (const u_char *)dp);
|
|
} else if (length >= MLDV2_MINLEN) {
|
|
ND_PRINT(" v2");
|
|
mldv2_query_print(ndo, (const u_char *)dp, length);
|
|
} else {
|
|
ND_PRINT(" unknown-version (len %u) ", length);
|
|
}
|
|
break;
|
|
case ICMP6_MEMBERSHIP_REPORT:
|
|
mld6_print(ndo, (const u_char *)dp);
|
|
break;
|
|
case ICMP6_MEMBERSHIP_REDUCTION:
|
|
mld6_print(ndo, (const u_char *)dp);
|
|
break;
|
|
case ND_ROUTER_SOLICIT:
|
|
#define RTSOLLEN 8
|
|
if (ndo->ndo_vflag) {
|
|
if (icmp6_opt_print(ndo, (const u_char *)dp + RTSOLLEN,
|
|
length - RTSOLLEN) == -1)
|
|
goto trunc;
|
|
}
|
|
break;
|
|
case ND_ROUTER_ADVERT:
|
|
#define RTADVLEN 16
|
|
if (ndo->ndo_vflag) {
|
|
const struct nd_router_advert *p;
|
|
|
|
p = (const struct nd_router_advert *)dp;
|
|
ND_PRINT("\n\thop limit %u, Flags [%s]"
|
|
", pref %s, router lifetime %us, reachable time %ums, retrans timer %ums",
|
|
GET_U_1(p->nd_ra_curhoplimit),
|
|
bittok2str(icmp6_opt_ra_flag_values,"none",GET_U_1(p->nd_ra_flags_reserved)),
|
|
get_rtpref(GET_U_1(p->nd_ra_flags_reserved)),
|
|
GET_BE_U_2(p->nd_ra_router_lifetime),
|
|
GET_BE_U_4(p->nd_ra_reachable),
|
|
GET_BE_U_4(p->nd_ra_retransmit));
|
|
|
|
if (icmp6_opt_print(ndo, (const u_char *)dp + RTADVLEN,
|
|
length - RTADVLEN) == -1)
|
|
goto trunc;
|
|
}
|
|
break;
|
|
case ND_NEIGHBOR_SOLICIT:
|
|
{
|
|
const struct nd_neighbor_solicit *p;
|
|
p = (const struct nd_neighbor_solicit *)dp;
|
|
ND_PRINT(", who has %s", GET_IP6ADDR_STRING(p->nd_ns_target));
|
|
if (ndo->ndo_vflag) {
|
|
#define NDSOLLEN 24
|
|
if (icmp6_opt_print(ndo, (const u_char *)dp + NDSOLLEN,
|
|
length - NDSOLLEN) == -1)
|
|
goto trunc;
|
|
}
|
|
}
|
|
break;
|
|
case ND_NEIGHBOR_ADVERT:
|
|
{
|
|
const struct nd_neighbor_advert *p;
|
|
|
|
p = (const struct nd_neighbor_advert *)dp;
|
|
ND_PRINT(", tgt is %s",
|
|
GET_IP6ADDR_STRING(p->nd_na_target));
|
|
if (ndo->ndo_vflag) {
|
|
ND_PRINT(", Flags [%s]",
|
|
bittok2str(icmp6_nd_na_flag_values,
|
|
"none",
|
|
GET_BE_U_4(p->nd_na_flags_reserved)));
|
|
#define NDADVLEN 24
|
|
if (icmp6_opt_print(ndo, (const u_char *)dp + NDADVLEN,
|
|
length - NDADVLEN) == -1)
|
|
goto trunc;
|
|
#undef NDADVLEN
|
|
}
|
|
}
|
|
break;
|
|
case ND_REDIRECT:
|
|
{
|
|
const struct nd_redirect *p;
|
|
|
|
p = (const struct nd_redirect *)dp;
|
|
ND_PRINT(", %s", GET_IP6ADDR_STRING(p->nd_rd_dst));
|
|
ND_PRINT(" to %s", GET_IP6ADDR_STRING(p->nd_rd_target));
|
|
#define REDIRECTLEN 40
|
|
if (ndo->ndo_vflag) {
|
|
if (icmp6_opt_print(ndo, (const u_char *)dp + REDIRECTLEN,
|
|
length - REDIRECTLEN) == -1)
|
|
goto trunc;
|
|
#undef REDIRECTLEN
|
|
}
|
|
}
|
|
break;
|
|
case ICMP6_ROUTER_RENUMBERING:
|
|
icmp6_rrenum_print(ndo, bp, ep);
|
|
break;
|
|
case ICMP6_NI_QUERY:
|
|
case ICMP6_NI_REPLY:
|
|
icmp6_nodeinfo_print(ndo, length, bp, ep);
|
|
break;
|
|
case IND_SOLICIT:
|
|
case IND_ADVERT:
|
|
break;
|
|
case ICMP6_V2_MEMBERSHIP_REPORT:
|
|
mldv2_report_print(ndo, (const u_char *) dp, length);
|
|
break;
|
|
case ICMP6_MOBILEPREFIX_SOLICIT: /* fall through */
|
|
case ICMP6_HADISCOV_REQUEST:
|
|
ND_PRINT(", id 0x%04x", GET_BE_U_2(dp->icmp6_data16[0]));
|
|
break;
|
|
case ICMP6_HADISCOV_REPLY:
|
|
if (ndo->ndo_vflag) {
|
|
const u_char *cp;
|
|
const u_char *p;
|
|
|
|
ND_PRINT(", id 0x%04x",
|
|
GET_BE_U_2(dp->icmp6_data16[0]));
|
|
cp = (const u_char *)dp + length;
|
|
p = (const u_char *)(dp + 1);
|
|
while (p < cp) {
|
|
ND_PRINT(", %s", GET_IP6ADDR_STRING(p));
|
|
p += 16;
|
|
}
|
|
}
|
|
break;
|
|
case ICMP6_MOBILEPREFIX_ADVERT:
|
|
if (ndo->ndo_vflag) {
|
|
uint16_t flags;
|
|
|
|
ND_PRINT(", id 0x%04x",
|
|
GET_BE_U_2(dp->icmp6_data16[0]));
|
|
flags = GET_BE_U_2(dp->icmp6_data16[1]);
|
|
if (flags & 0xc000)
|
|
ND_PRINT(" ");
|
|
if (flags & 0x8000)
|
|
ND_PRINT("M");
|
|
if (flags & 0x4000)
|
|
ND_PRINT("O");
|
|
#define MPADVLEN 8
|
|
if (icmp6_opt_print(ndo, (const u_char *)dp + MPADVLEN,
|
|
length - MPADVLEN) == -1)
|
|
goto trunc;
|
|
}
|
|
break;
|
|
case ND_RPL_MESSAGE:
|
|
/* plus 4, because struct icmp6_hdr contains 4 bytes of icmp payload */
|
|
rpl_print(ndo, icmp6_code, dp->icmp6_data, length-sizeof(struct icmp6_hdr)+4);
|
|
break;
|
|
default:
|
|
ND_PRINT(", length %u", length);
|
|
if (ndo->ndo_vflag <= 1)
|
|
print_unknown_data(ndo, bp,"\n\t", length);
|
|
return;
|
|
}
|
|
if (!ndo->ndo_vflag)
|
|
ND_PRINT(", length %u", length);
|
|
return;
|
|
trunc:
|
|
nd_print_trunc(ndo);
|
|
}
|
|
|
|
static const struct udphdr *
|
|
get_upperlayer(netdissect_options *ndo, const u_char *bp, u_int *prot)
|
|
{
|
|
const u_char *ep;
|
|
const struct ip6_hdr *ip6 = (const struct ip6_hdr *)bp;
|
|
const struct udphdr *uh;
|
|
const struct ip6_hbh *hbh;
|
|
const struct ip6_frag *fragh;
|
|
const struct ah *ah;
|
|
u_int nh;
|
|
int hlen;
|
|
|
|
/* 'ep' points to the end of available data. */
|
|
ep = ndo->ndo_snapend;
|
|
|
|
if (!ND_TTEST_1(ip6->ip6_nxt))
|
|
return NULL;
|
|
|
|
nh = GET_U_1(ip6->ip6_nxt);
|
|
hlen = sizeof(struct ip6_hdr);
|
|
|
|
while (bp < ep) {
|
|
bp += hlen;
|
|
|
|
switch(nh) {
|
|
case IPPROTO_UDP:
|
|
case IPPROTO_TCP:
|
|
uh = (const struct udphdr *)bp;
|
|
if (ND_TTEST_2(uh->uh_dport)) {
|
|
*prot = nh;
|
|
return(uh);
|
|
}
|
|
else
|
|
return(NULL);
|
|
/* NOTREACHED */
|
|
|
|
case IPPROTO_HOPOPTS:
|
|
case IPPROTO_DSTOPTS:
|
|
case IPPROTO_ROUTING:
|
|
hbh = (const struct ip6_hbh *)bp;
|
|
if (!ND_TTEST_1(hbh->ip6h_len))
|
|
return(NULL);
|
|
nh = GET_U_1(hbh->ip6h_nxt);
|
|
hlen = (GET_U_1(hbh->ip6h_len) + 1) << 3;
|
|
break;
|
|
|
|
case IPPROTO_FRAGMENT: /* this should be odd, but try anyway */
|
|
fragh = (const struct ip6_frag *)bp;
|
|
if (!ND_TTEST_2(fragh->ip6f_offlg))
|
|
return(NULL);
|
|
/* fragments with non-zero offset are meaningless */
|
|
if ((GET_BE_U_2(fragh->ip6f_offlg) & IP6F_OFF_MASK) != 0)
|
|
return(NULL);
|
|
nh = GET_U_1(fragh->ip6f_nxt);
|
|
hlen = sizeof(struct ip6_frag);
|
|
break;
|
|
|
|
case IPPROTO_AH:
|
|
ah = (const struct ah *)bp;
|
|
if (!ND_TTEST_1(ah->ah_len))
|
|
return(NULL);
|
|
nh = GET_U_1(ah->ah_nxt);
|
|
hlen = (GET_U_1(ah->ah_len) + 2) << 2;
|
|
break;
|
|
|
|
default: /* unknown or undecodable header */
|
|
*prot = nh; /* meaningless, but set here anyway */
|
|
return(NULL);
|
|
}
|
|
}
|
|
|
|
return(NULL); /* should be notreached, though */
|
|
}
|
|
|
|
static int
|
|
icmp6_opt_print(netdissect_options *ndo, const u_char *bp, int resid)
|
|
{
|
|
const struct nd_opt_hdr *op;
|
|
uint8_t opt_type;
|
|
u_int opt_len;
|
|
const struct nd_opt_prefix_info *opp;
|
|
const struct nd_opt_mtu *opm;
|
|
const struct nd_opt_rdnss *oprd;
|
|
const struct nd_opt_dnssl *opds;
|
|
const struct nd_opt_advinterval *opa;
|
|
const struct nd_opt_homeagent_info *oph;
|
|
const struct nd_opt_route_info *opri;
|
|
const u_char *cp, *ep, *domp;
|
|
nd_ipv6 in6;
|
|
size_t l;
|
|
u_int i;
|
|
|
|
cp = bp;
|
|
/* 'ep' points to the end of available data. */
|
|
ep = ndo->ndo_snapend;
|
|
|
|
while (cp < ep) {
|
|
op = (const struct nd_opt_hdr *)cp;
|
|
|
|
ND_TCHECK_1(op->nd_opt_len);
|
|
if (resid <= 0)
|
|
return 0;
|
|
opt_type = GET_U_1(op->nd_opt_type);
|
|
opt_len = GET_U_1(op->nd_opt_len);
|
|
if (opt_len == 0)
|
|
goto trunc;
|
|
if (cp + (opt_len << 3) > ep)
|
|
goto trunc;
|
|
|
|
ND_PRINT("\n\t %s option (%u), length %u (%u): ",
|
|
tok2str(icmp6_opt_values, "unknown", opt_type),
|
|
opt_type,
|
|
opt_len << 3,
|
|
opt_len);
|
|
|
|
switch (opt_type) {
|
|
case ND_OPT_SOURCE_LINKADDR:
|
|
l = (opt_len << 3) - 2;
|
|
print_lladdr(ndo, cp + 2, l);
|
|
break;
|
|
case ND_OPT_TARGET_LINKADDR:
|
|
l = (opt_len << 3) - 2;
|
|
print_lladdr(ndo, cp + 2, l);
|
|
break;
|
|
case ND_OPT_PREFIX_INFORMATION:
|
|
opp = (const struct nd_opt_prefix_info *)op;
|
|
ND_PRINT("%s/%u%s, Flags [%s], valid time %s",
|
|
GET_IP6ADDR_STRING(opp->nd_opt_pi_prefix),
|
|
GET_U_1(opp->nd_opt_pi_prefix_len),
|
|
(opt_len != 4) ? "badlen" : "",
|
|
bittok2str(icmp6_opt_pi_flag_values, "none", GET_U_1(opp->nd_opt_pi_flags_reserved)),
|
|
get_lifetime(GET_BE_U_4(opp->nd_opt_pi_valid_time)));
|
|
ND_PRINT(", pref. time %s",
|
|
get_lifetime(GET_BE_U_4(opp->nd_opt_pi_preferred_time)));
|
|
break;
|
|
case ND_OPT_REDIRECTED_HEADER:
|
|
print_unknown_data(ndo, bp,"\n\t ",opt_len<<3);
|
|
/* xxx */
|
|
break;
|
|
case ND_OPT_MTU:
|
|
opm = (const struct nd_opt_mtu *)op;
|
|
ND_PRINT(" %u%s",
|
|
GET_BE_U_4(opm->nd_opt_mtu_mtu),
|
|
(opt_len != 1) ? "bad option length" : "" );
|
|
break;
|
|
case ND_OPT_RDNSS:
|
|
oprd = (const struct nd_opt_rdnss *)op;
|
|
l = (opt_len - 1) / 2;
|
|
ND_PRINT(" lifetime %us,",
|
|
GET_BE_U_4(oprd->nd_opt_rdnss_lifetime));
|
|
for (i = 0; i < l; i++) {
|
|
ND_PRINT(" addr: %s",
|
|
GET_IP6ADDR_STRING(oprd->nd_opt_rdnss_addr[i]));
|
|
}
|
|
break;
|
|
case ND_OPT_DNSSL:
|
|
opds = (const struct nd_opt_dnssl *)op;
|
|
ND_PRINT(" lifetime %us, domain(s):",
|
|
GET_BE_U_4(opds->nd_opt_dnssl_lifetime));
|
|
domp = cp + 8; /* domain names, variable-sized, RFC1035-encoded */
|
|
while (domp < cp + (opt_len << 3) && GET_U_1(domp) != '\0')
|
|
{
|
|
ND_PRINT(" ");
|
|
if ((domp = fqdn_print(ndo, domp, bp)) == NULL)
|
|
goto trunc;
|
|
}
|
|
break;
|
|
case ND_OPT_ADVINTERVAL:
|
|
opa = (const struct nd_opt_advinterval *)op;
|
|
ND_PRINT(" %ums",
|
|
GET_BE_U_4(opa->nd_opt_adv_interval));
|
|
break;
|
|
case ND_OPT_HOMEAGENT_INFO:
|
|
oph = (const struct nd_opt_homeagent_info *)op;
|
|
ND_PRINT(" preference %u, lifetime %u",
|
|
GET_BE_U_2(oph->nd_opt_hai_preference),
|
|
GET_BE_U_2(oph->nd_opt_hai_lifetime));
|
|
break;
|
|
case ND_OPT_ROUTE_INFO:
|
|
opri = (const struct nd_opt_route_info *)op;
|
|
ND_TCHECK_4(opri->nd_opt_rti_lifetime);
|
|
memset(&in6, 0, sizeof(in6));
|
|
switch (opt_len) {
|
|
case 1:
|
|
break;
|
|
case 2:
|
|
GET_CPY_BYTES(&in6, opri + 1, 8);
|
|
break;
|
|
case 3:
|
|
GET_CPY_BYTES(&in6, opri + 1, 16);
|
|
break;
|
|
default:
|
|
goto trunc;
|
|
}
|
|
ND_PRINT(" %s/%u", ip6addr_string(ndo, (const u_char *)&in6),
|
|
GET_U_1(opri->nd_opt_rti_prefixlen));
|
|
ND_PRINT(", pref=%s",
|
|
get_rtpref(GET_U_1(opri->nd_opt_rti_flags)));
|
|
ND_PRINT(", lifetime=%s",
|
|
get_lifetime(GET_BE_U_4(opri->nd_opt_rti_lifetime)));
|
|
break;
|
|
default:
|
|
if (ndo->ndo_vflag <= 1) {
|
|
print_unknown_data(ndo,cp+2,"\n\t ", (opt_len << 3) - 2); /* skip option header */
|
|
return 0;
|
|
}
|
|
break;
|
|
}
|
|
/* do we want to see an additional hexdump ? */
|
|
if (ndo->ndo_vflag> 1)
|
|
print_unknown_data(ndo, cp+2,"\n\t ", (opt_len << 3) - 2); /* skip option header */
|
|
|
|
cp += opt_len << 3;
|
|
resid -= opt_len << 3;
|
|
}
|
|
return 0;
|
|
|
|
trunc:
|
|
return -1;
|
|
}
|
|
|
|
static void
|
|
mld6_print(netdissect_options *ndo, const u_char *bp)
|
|
{
|
|
const struct mld6_hdr *mp = (const struct mld6_hdr *)bp;
|
|
const u_char *ep;
|
|
|
|
/* 'ep' points to the end of available data. */
|
|
ep = ndo->ndo_snapend;
|
|
|
|
if ((const u_char *)mp + sizeof(*mp) > ep)
|
|
return;
|
|
|
|
ND_PRINT("max resp delay: %u ", GET_BE_U_2(mp->mld6_maxdelay));
|
|
ND_PRINT("addr: %s", GET_IP6ADDR_STRING(mp->mld6_addr));
|
|
}
|
|
|
|
static void
|
|
mldv2_report_print(netdissect_options *ndo, const u_char *bp, u_int len)
|
|
{
|
|
const struct icmp6_hdr *icp = (const struct icmp6_hdr *) bp;
|
|
u_int group, nsrcs, ngroups;
|
|
u_int i, j;
|
|
|
|
/* Minimum len is 8 */
|
|
if (len < 8) {
|
|
ND_PRINT(" [invalid len %u]", len);
|
|
return;
|
|
}
|
|
|
|
ngroups = GET_BE_U_2(icp->icmp6_data16[1]);
|
|
ND_PRINT(", %u group record(s)", ngroups);
|
|
if (ndo->ndo_vflag > 0) {
|
|
/* Print the group records */
|
|
group = 8;
|
|
for (i = 0; i < ngroups; i++) {
|
|
/* type(1) + auxlen(1) + numsrc(2) + grp(16) */
|
|
if (len < group + 20) {
|
|
ND_PRINT(" [invalid number of groups]");
|
|
return;
|
|
}
|
|
ND_PRINT(" [gaddr %s", GET_IP6ADDR_STRING(bp + group + 4));
|
|
ND_PRINT(" %s", tok2str(mldv2report2str, " [v2-report-#%u]",
|
|
GET_U_1(bp + group)));
|
|
nsrcs = GET_BE_U_2(bp + group + 2);
|
|
/* Check the number of sources and print them */
|
|
if (len < group + 20 + (nsrcs * sizeof(nd_ipv6))) {
|
|
ND_PRINT(" [invalid number of sources %u]", nsrcs);
|
|
return;
|
|
}
|
|
if (ndo->ndo_vflag == 1)
|
|
ND_PRINT(", %u source(s)", nsrcs);
|
|
else {
|
|
/* Print the sources */
|
|
ND_PRINT(" {");
|
|
for (j = 0; j < nsrcs; j++) {
|
|
ND_PRINT(" %s", GET_IP6ADDR_STRING(bp + group + 20 + (j * sizeof(nd_ipv6))));
|
|
}
|
|
ND_PRINT(" }");
|
|
}
|
|
/* Next group record */
|
|
group += 20 + nsrcs * sizeof(nd_ipv6);
|
|
ND_PRINT("]");
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
mldv2_query_print(netdissect_options *ndo, const u_char *bp, u_int len)
|
|
{
|
|
const struct icmp6_hdr *icp = (const struct icmp6_hdr *) bp;
|
|
u_int mrc;
|
|
u_int mrt, qqi;
|
|
u_int nsrcs;
|
|
u_int i;
|
|
|
|
/* Minimum len is 28 */
|
|
if (len < 28) {
|
|
ND_PRINT(" [invalid len %u]", len);
|
|
return;
|
|
}
|
|
mrc = GET_BE_U_2(icp->icmp6_data16[0]);
|
|
if (mrc < 32768) {
|
|
mrt = mrc;
|
|
} else {
|
|
mrt = ((mrc & 0x0fff) | 0x1000) << (((mrc & 0x7000) >> 12) + 3);
|
|
}
|
|
if (ndo->ndo_vflag) {
|
|
ND_PRINT(" [max resp delay=%u]", mrt);
|
|
}
|
|
ND_PRINT(" [gaddr %s", GET_IP6ADDR_STRING(bp + 8));
|
|
|
|
if (ndo->ndo_vflag) {
|
|
if (GET_U_1(bp + 24) & 0x08) {
|
|
ND_PRINT(" sflag");
|
|
}
|
|
if (GET_U_1(bp + 24) & 0x07) {
|
|
ND_PRINT(" robustness=%u", GET_U_1(bp + 24) & 0x07);
|
|
}
|
|
if (GET_U_1(bp + 25) < 128) {
|
|
qqi = GET_U_1(bp + 25);
|
|
} else {
|
|
qqi = ((GET_U_1(bp + 25) & 0x0f) | 0x10) <<
|
|
(((GET_U_1(bp + 25) & 0x70) >> 4) + 3);
|
|
}
|
|
ND_PRINT(" qqi=%u", qqi);
|
|
}
|
|
|
|
nsrcs = GET_BE_U_2(bp + 26);
|
|
if (nsrcs > 0) {
|
|
if (len < 28 + nsrcs * sizeof(nd_ipv6))
|
|
ND_PRINT(" [invalid number of sources]");
|
|
else if (ndo->ndo_vflag > 1) {
|
|
ND_PRINT(" {");
|
|
for (i = 0; i < nsrcs; i++) {
|
|
ND_PRINT(" %s", GET_IP6ADDR_STRING(bp + 28 + (i * sizeof(nd_ipv6))));
|
|
}
|
|
ND_PRINT(" }");
|
|
} else
|
|
ND_PRINT(", %u source(s)", nsrcs);
|
|
}
|
|
ND_PRINT("]");
|
|
}
|
|
|
|
static void
|
|
dnsname_print(netdissect_options *ndo, const u_char *cp, const u_char *ep)
|
|
{
|
|
int i;
|
|
|
|
/* DNS name decoding - no decompression */
|
|
ND_PRINT(", \"");
|
|
while (cp < ep) {
|
|
i = GET_U_1(cp);
|
|
cp++;
|
|
if (i) {
|
|
if (i > ep - cp) {
|
|
ND_PRINT("???");
|
|
break;
|
|
}
|
|
while (i-- && cp < ep) {
|
|
fn_print_char(ndo, GET_U_1(cp));
|
|
cp++;
|
|
}
|
|
if (cp + 1 < ep && GET_U_1(cp))
|
|
ND_PRINT(".");
|
|
} else {
|
|
if (cp == ep) {
|
|
/* FQDN */
|
|
ND_PRINT(".");
|
|
} else if (cp + 1 == ep && GET_U_1(cp) == '\0') {
|
|
/* truncated */
|
|
} else {
|
|
/* invalid */
|
|
ND_PRINT("???");
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
ND_PRINT("\"");
|
|
}
|
|
|
|
static void
|
|
icmp6_nodeinfo_print(netdissect_options *ndo, u_int icmp6len, const u_char *bp, const u_char *ep)
|
|
{
|
|
const struct icmp6_nodeinfo *ni6;
|
|
const struct icmp6_hdr *dp;
|
|
const u_char *cp;
|
|
size_t siz, i;
|
|
int needcomma;
|
|
|
|
if (ep < bp)
|
|
return;
|
|
dp = (const struct icmp6_hdr *)bp;
|
|
ni6 = (const struct icmp6_nodeinfo *)bp;
|
|
siz = ep - bp;
|
|
|
|
switch (GET_U_1(ni6->ni_type)) {
|
|
case ICMP6_NI_QUERY:
|
|
if (siz == sizeof(*dp) + 4) {
|
|
/* KAME who-are-you */
|
|
ND_PRINT(" who-are-you request");
|
|
break;
|
|
}
|
|
ND_PRINT(" node information query");
|
|
|
|
ND_TCHECK_LEN(dp, sizeof(*ni6));
|
|
ni6 = (const struct icmp6_nodeinfo *)dp;
|
|
ND_PRINT(" ("); /*)*/
|
|
switch (GET_BE_U_2(ni6->ni_qtype)) {
|
|
case NI_QTYPE_NOOP:
|
|
ND_PRINT("noop");
|
|
break;
|
|
case NI_QTYPE_SUPTYPES:
|
|
ND_PRINT("supported qtypes");
|
|
i = GET_BE_U_2(ni6->ni_flags);
|
|
if (i)
|
|
ND_PRINT(" [%s]", (i & 0x01) ? "C" : "");
|
|
break;
|
|
case NI_QTYPE_FQDN:
|
|
ND_PRINT("DNS name");
|
|
break;
|
|
case NI_QTYPE_NODEADDR:
|
|
ND_PRINT("node addresses");
|
|
i = GET_BE_U_2(ni6->ni_flags);
|
|
if (!i)
|
|
break;
|
|
/* NI_NODEADDR_FLAG_TRUNCATE undefined for query */
|
|
ND_PRINT(" [%s%s%s%s%s%s]",
|
|
(i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
|
|
(i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
|
|
(i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
|
|
(i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
|
|
(i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
|
|
(i & NI_NODEADDR_FLAG_ALL) ? "A" : "");
|
|
break;
|
|
default:
|
|
ND_PRINT("unknown");
|
|
break;
|
|
}
|
|
|
|
if (GET_BE_U_2(ni6->ni_qtype) == NI_QTYPE_NOOP ||
|
|
GET_BE_U_2(ni6->ni_qtype) == NI_QTYPE_SUPTYPES) {
|
|
if (siz != sizeof(*ni6))
|
|
if (ndo->ndo_vflag)
|
|
ND_PRINT(", invalid len");
|
|
/*(*/
|
|
ND_PRINT(")");
|
|
break;
|
|
}
|
|
|
|
|
|
/* XXX backward compat, icmp-name-lookup-03 */
|
|
if (siz == sizeof(*ni6)) {
|
|
ND_PRINT(", 03 draft");
|
|
/*(*/
|
|
ND_PRINT(")");
|
|
break;
|
|
}
|
|
|
|
cp = (const u_char *)(ni6 + 1);
|
|
switch (GET_U_1(ni6->ni_code)) {
|
|
case ICMP6_NI_SUBJ_IPV6:
|
|
if (!ND_TTEST_LEN(dp, sizeof(*ni6) + sizeof(nd_ipv6)))
|
|
break;
|
|
if (siz != sizeof(*ni6) + sizeof(nd_ipv6)) {
|
|
if (ndo->ndo_vflag)
|
|
ND_PRINT(", invalid subject len");
|
|
break;
|
|
}
|
|
ND_PRINT(", subject=%s",
|
|
GET_IP6ADDR_STRING(cp));
|
|
break;
|
|
case ICMP6_NI_SUBJ_FQDN:
|
|
ND_PRINT(", subject=DNS name");
|
|
if (GET_U_1(cp) == ep - cp - 1) {
|
|
/* icmp-name-lookup-03, pascal string */
|
|
if (ndo->ndo_vflag)
|
|
ND_PRINT(", 03 draft");
|
|
cp++;
|
|
ND_PRINT(", \"");
|
|
while (cp < ep) {
|
|
fn_print_char(ndo, GET_U_1(cp));
|
|
cp++;
|
|
}
|
|
ND_PRINT("\"");
|
|
} else
|
|
dnsname_print(ndo, cp, ep);
|
|
break;
|
|
case ICMP6_NI_SUBJ_IPV4:
|
|
if (!ND_TTEST_LEN(dp, sizeof(*ni6) + sizeof(nd_ipv4)))
|
|
break;
|
|
if (siz != sizeof(*ni6) + sizeof(nd_ipv4)) {
|
|
if (ndo->ndo_vflag)
|
|
ND_PRINT(", invalid subject len");
|
|
break;
|
|
}
|
|
ND_PRINT(", subject=%s",
|
|
GET_IPADDR_STRING(cp));
|
|
break;
|
|
default:
|
|
ND_PRINT(", unknown subject");
|
|
break;
|
|
}
|
|
|
|
/*(*/
|
|
ND_PRINT(")");
|
|
break;
|
|
|
|
case ICMP6_NI_REPLY:
|
|
if (icmp6len > siz)
|
|
goto trunc;
|
|
|
|
needcomma = 0;
|
|
|
|
ND_TCHECK_LEN(dp, sizeof(*ni6));
|
|
ni6 = (const struct icmp6_nodeinfo *)dp;
|
|
ND_PRINT(" node information reply");
|
|
ND_PRINT(" ("); /*)*/
|
|
switch (GET_U_1(ni6->ni_code)) {
|
|
case ICMP6_NI_SUCCESS:
|
|
if (ndo->ndo_vflag) {
|
|
ND_PRINT("success");
|
|
needcomma++;
|
|
}
|
|
break;
|
|
case ICMP6_NI_REFUSED:
|
|
ND_PRINT("refused");
|
|
needcomma++;
|
|
if (siz != sizeof(*ni6))
|
|
if (ndo->ndo_vflag)
|
|
ND_PRINT(", invalid length");
|
|
break;
|
|
case ICMP6_NI_UNKNOWN:
|
|
ND_PRINT("unknown");
|
|
needcomma++;
|
|
if (siz != sizeof(*ni6))
|
|
if (ndo->ndo_vflag)
|
|
ND_PRINT(", invalid length");
|
|
break;
|
|
}
|
|
|
|
if (GET_U_1(ni6->ni_code) != ICMP6_NI_SUCCESS) {
|
|
/*(*/
|
|
ND_PRINT(")");
|
|
break;
|
|
}
|
|
|
|
switch (GET_BE_U_2(ni6->ni_qtype)) {
|
|
case NI_QTYPE_NOOP:
|
|
if (needcomma)
|
|
ND_PRINT(", ");
|
|
ND_PRINT("noop");
|
|
if (siz != sizeof(*ni6))
|
|
if (ndo->ndo_vflag)
|
|
ND_PRINT(", invalid length");
|
|
break;
|
|
case NI_QTYPE_SUPTYPES:
|
|
if (needcomma)
|
|
ND_PRINT(", ");
|
|
ND_PRINT("supported qtypes");
|
|
i = GET_BE_U_2(ni6->ni_flags);
|
|
if (i)
|
|
ND_PRINT(" [%s]", (i & 0x01) ? "C" : "");
|
|
break;
|
|
case NI_QTYPE_FQDN:
|
|
if (needcomma)
|
|
ND_PRINT(", ");
|
|
ND_PRINT("DNS name");
|
|
cp = (const u_char *)(ni6 + 1) + 4;
|
|
if (GET_U_1(cp) == ep - cp - 1) {
|
|
/* icmp-name-lookup-03, pascal string */
|
|
if (ndo->ndo_vflag)
|
|
ND_PRINT(", 03 draft");
|
|
cp++;
|
|
ND_PRINT(", \"");
|
|
while (cp < ep) {
|
|
fn_print_char(ndo, GET_U_1(cp));
|
|
cp++;
|
|
}
|
|
ND_PRINT("\"");
|
|
} else
|
|
dnsname_print(ndo, cp, ep);
|
|
if ((GET_BE_U_2(ni6->ni_flags) & 0x01) != 0)
|
|
ND_PRINT(" [TTL=%u]", GET_BE_U_4(ni6 + 1));
|
|
break;
|
|
case NI_QTYPE_NODEADDR:
|
|
if (needcomma)
|
|
ND_PRINT(", ");
|
|
ND_PRINT("node addresses");
|
|
i = sizeof(*ni6);
|
|
while (i < siz) {
|
|
if (i + sizeof(uint32_t) + sizeof(nd_ipv6) > siz)
|
|
break;
|
|
ND_PRINT(" %s(%u)",
|
|
GET_IP6ADDR_STRING(bp + i + sizeof(uint32_t)),
|
|
GET_BE_U_4(bp + i));
|
|
i += sizeof(uint32_t) + sizeof(nd_ipv6);
|
|
}
|
|
i = GET_BE_U_2(ni6->ni_flags);
|
|
if (!i)
|
|
break;
|
|
ND_PRINT(" [%s%s%s%s%s%s%s]",
|
|
(i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "",
|
|
(i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "",
|
|
(i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "",
|
|
(i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "",
|
|
(i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "",
|
|
(i & NI_NODEADDR_FLAG_ALL) ? "A" : "",
|
|
(i & NI_NODEADDR_FLAG_TRUNCATE) ? "T" : "");
|
|
break;
|
|
default:
|
|
if (needcomma)
|
|
ND_PRINT(", ");
|
|
ND_PRINT("unknown");
|
|
break;
|
|
}
|
|
|
|
/*(*/
|
|
ND_PRINT(")");
|
|
break;
|
|
}
|
|
return;
|
|
|
|
trunc:
|
|
nd_print_trunc(ndo);
|
|
}
|
|
|
|
static void
|
|
icmp6_rrenum_print(netdissect_options *ndo, const u_char *bp, const u_char *ep)
|
|
{
|
|
const struct icmp6_router_renum *rr6;
|
|
const char *cp;
|
|
const struct rr_pco_match *match;
|
|
const struct rr_pco_use *use;
|
|
char hbuf[NI_MAXHOST];
|
|
int n;
|
|
|
|
if (ep < bp)
|
|
return;
|
|
rr6 = (const struct icmp6_router_renum *)bp;
|
|
cp = (const char *)(rr6 + 1);
|
|
|
|
ND_TCHECK_4(rr6->rr_reserved);
|
|
switch (GET_U_1(rr6->rr_code)) {
|
|
case ICMP6_ROUTER_RENUMBERING_COMMAND:
|
|
ND_PRINT("router renum: command");
|
|
break;
|
|
case ICMP6_ROUTER_RENUMBERING_RESULT:
|
|
ND_PRINT("router renum: result");
|
|
break;
|
|
case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET:
|
|
ND_PRINT("router renum: sequence number reset");
|
|
break;
|
|
default:
|
|
ND_PRINT("router renum: code-#%u", GET_U_1(rr6->rr_code));
|
|
break;
|
|
}
|
|
|
|
ND_PRINT(", seq=%u", GET_BE_U_4(rr6->rr_seqnum));
|
|
|
|
if (ndo->ndo_vflag) {
|
|
uint8_t rr_flags = GET_U_1(rr6->rr_flags);
|
|
#define F(x, y) (rr_flags & (x) ? (y) : "")
|
|
ND_PRINT("["); /*]*/
|
|
if (rr_flags) {
|
|
ND_PRINT("%s%s%s%s%s,", F(ICMP6_RR_FLAGS_TEST, "T"),
|
|
F(ICMP6_RR_FLAGS_REQRESULT, "R"),
|
|
F(ICMP6_RR_FLAGS_FORCEAPPLY, "A"),
|
|
F(ICMP6_RR_FLAGS_SPECSITE, "S"),
|
|
F(ICMP6_RR_FLAGS_PREVDONE, "P"));
|
|
}
|
|
ND_PRINT("seg=%u,", GET_U_1(rr6->rr_segnum));
|
|
ND_PRINT("maxdelay=%u", GET_BE_U_2(rr6->rr_maxdelay));
|
|
if (GET_BE_U_4(rr6->rr_reserved))
|
|
ND_PRINT("rsvd=0x%x", GET_BE_U_4(rr6->rr_reserved));
|
|
/*[*/
|
|
ND_PRINT("]");
|
|
#undef F
|
|
}
|
|
|
|
if (GET_U_1(rr6->rr_code) == ICMP6_ROUTER_RENUMBERING_COMMAND) {
|
|
match = (const struct rr_pco_match *)cp;
|
|
cp = (const char *)(match + 1);
|
|
|
|
ND_TCHECK_16(match->rpm_prefix);
|
|
|
|
if (ndo->ndo_vflag > 1)
|
|
ND_PRINT("\n\t");
|
|
else
|
|
ND_PRINT(" ");
|
|
ND_PRINT("match("); /*)*/
|
|
switch (GET_U_1(match->rpm_code)) {
|
|
case RPM_PCO_ADD: ND_PRINT("add"); break;
|
|
case RPM_PCO_CHANGE: ND_PRINT("change"); break;
|
|
case RPM_PCO_SETGLOBAL: ND_PRINT("setglobal"); break;
|
|
default: ND_PRINT("#%u",
|
|
GET_U_1(match->rpm_code)); break;
|
|
}
|
|
|
|
if (ndo->ndo_vflag) {
|
|
ND_PRINT(",ord=%u", GET_U_1(match->rpm_ordinal));
|
|
ND_PRINT(",min=%u", GET_U_1(match->rpm_minlen));
|
|
ND_PRINT(",max=%u", GET_U_1(match->rpm_maxlen));
|
|
}
|
|
if (addrtostr6(match->rpm_prefix, hbuf, sizeof(hbuf)))
|
|
ND_PRINT(",%s/%u", hbuf, GET_U_1(match->rpm_matchlen));
|
|
else
|
|
ND_PRINT(",?/%u", GET_U_1(match->rpm_matchlen));
|
|
/*(*/
|
|
ND_PRINT(")");
|
|
|
|
n = GET_U_1(match->rpm_len) - 3;
|
|
if (n % 4)
|
|
goto trunc;
|
|
n /= 4;
|
|
while (n-- > 0) {
|
|
use = (const struct rr_pco_use *)cp;
|
|
cp = (const char *)(use + 1);
|
|
|
|
ND_TCHECK_16(use->rpu_prefix);
|
|
|
|
if (ndo->ndo_vflag > 1)
|
|
ND_PRINT("\n\t");
|
|
else
|
|
ND_PRINT(" ");
|
|
ND_PRINT("use("); /*)*/
|
|
if (GET_U_1(use->rpu_flags)) {
|
|
#define F(x, y) (GET_U_1(use->rpu_flags) & (x) ? (y) : "")
|
|
ND_PRINT("%s%s,",
|
|
F(ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME, "V"),
|
|
F(ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME, "P"));
|
|
#undef F
|
|
}
|
|
if (ndo->ndo_vflag) {
|
|
ND_PRINT("mask=0x%x,",
|
|
GET_U_1(use->rpu_ramask));
|
|
ND_PRINT("raflags=0x%x,",
|
|
GET_U_1(use->rpu_raflags));
|
|
if (GET_BE_U_4(use->rpu_vltime) == 0xffffffff)
|
|
ND_PRINT("vltime=infty,");
|
|
else
|
|
ND_PRINT("vltime=%u,",
|
|
GET_BE_U_4(use->rpu_vltime));
|
|
if (GET_BE_U_4(use->rpu_pltime) == 0xffffffff)
|
|
ND_PRINT("pltime=infty,");
|
|
else
|
|
ND_PRINT("pltime=%u,",
|
|
GET_BE_U_4(use->rpu_pltime));
|
|
}
|
|
if (addrtostr6(use->rpu_prefix, hbuf, sizeof(hbuf)))
|
|
ND_PRINT("%s/%u/%u", hbuf,
|
|
GET_U_1(use->rpu_uselen),
|
|
GET_U_1(use->rpu_keeplen));
|
|
else
|
|
ND_PRINT("?/%u/%u", GET_U_1(use->rpu_uselen),
|
|
GET_U_1(use->rpu_keeplen));
|
|
/*(*/
|
|
ND_PRINT(")");
|
|
}
|
|
}
|
|
|
|
return;
|
|
|
|
trunc:
|
|
nd_print_trunc(ndo);
|
|
}
|