1962 lines
60 KiB
C
1962 lines
60 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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static const char icmp6_tstr[] = " [|icmp6]";
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static const char rpl_tstr[] = " [|rpl]";
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static const char mldv2_tstr[] = " [|mldv2]";
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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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uint8_t icmp6_type; /* type field */
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uint8_t icmp6_code; /* code field */
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uint16_t icmp6_cksum; /* checksum field */
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union {
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uint32_t icmp6_un_data32[1]; /* type-specific field */
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uint16_t icmp6_un_data16[2]; /* type-specific field */
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uint8_t icmp6_un_data8[4]; /* 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_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 */
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#define ICMP6_NI_REPLY 140 /* node information reply */
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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_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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struct in6_addr 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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uint32_t nd_ra_reachable; /* reachable time */
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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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/*
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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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struct in6_addr 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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struct in6_addr 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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struct in6_addr nd_rd_target; /* target address */
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struct in6_addr 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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uint8_t nd_opt_type;
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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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struct in6_addr 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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uint8_t nd_opt_rh_type;
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uint8_t nd_opt_rh_len;
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uint16_t nd_opt_rh_reserved1;
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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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uint8_t nd_opt_mtu_type;
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uint8_t nd_opt_mtu_len;
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uint16_t nd_opt_mtu_reserved;
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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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uint8_t nd_opt_rdnss_type;
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uint8_t nd_opt_rdnss_len;
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uint16_t nd_opt_rdnss_reserved;
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uint32_t nd_opt_rdnss_lifetime;
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struct in6_addr 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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uint8_t nd_opt_dnssl_type;
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uint8_t nd_opt_dnssl_len;
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uint16_t nd_opt_dnssl_reserved;
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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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uint8_t nd_opt_adv_type;
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uint8_t nd_opt_adv_len;
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uint16_t nd_opt_adv_reserved;
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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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uint8_t nd_opt_hai_type;
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uint8_t nd_opt_hai_len;
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uint16_t nd_opt_hai_reserved;
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int16_t nd_opt_hai_preference;
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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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uint8_t nd_opt_rti_type;
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uint8_t nd_opt_rti_len;
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uint8_t nd_opt_rti_prefixlen;
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uint8_t nd_opt_rti_flags;
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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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uint8_t icmp6_nl_nonce[8];
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int32_t icmp6_nl_ttl;
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#if 0
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uint8_t icmp6_nl_len;
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uint8_t 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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uint8_t 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 */
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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 {
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uint32_t ni_fqdn_ttl; /* TTL */
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uint8_t ni_fqdn_namelen; /* length in octets of the FQDN */
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uint8_t ni_fqdn_name[3]; /* XXX: alignment */
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};
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/*
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* Router Renumbering. as router-renum-08.txt
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*/
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struct icmp6_router_renum { /* router renumbering header */
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struct icmp6_hdr rr_hdr;
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uint8_t rr_segnum;
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uint8_t rr_flags;
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uint16_t rr_maxdelay;
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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 */
|
|
uint8_t rpm_code;
|
|
uint8_t rpm_len;
|
|
uint8_t rpm_ordinal;
|
|
uint8_t rpm_matchlen;
|
|
uint8_t rpm_minlen;
|
|
uint8_t rpm_maxlen;
|
|
uint16_t rpm_reserved;
|
|
struct in6_addr 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 */
|
|
uint8_t rpu_uselen;
|
|
uint8_t rpu_keeplen;
|
|
uint8_t rpu_ramask;
|
|
uint8_t rpu_raflags;
|
|
uint32_t rpu_vltime;
|
|
uint32_t rpu_pltime;
|
|
uint32_t rpu_flags;
|
|
struct in6_addr 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 */
|
|
uint16_t rrr_flags;
|
|
uint8_t rrr_ordinal;
|
|
uint8_t rrr_matchedlen;
|
|
uint32_t rrr_ifid;
|
|
struct in6_addr 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 void 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
|
|
|
|
#include "rpl.h"
|
|
|
|
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"},
|
|
{ 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((ndo,":"));
|
|
ND_PRINT((ndo,"%02x", *q++));
|
|
l--;
|
|
}
|
|
}
|
|
|
|
static int 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_PAD0, "pad0"},
|
|
{ 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_dio_printopt(netdissect_options *ndo,
|
|
const struct rpl_dio_genoption *opt,
|
|
u_int length)
|
|
{
|
|
if(length < RPL_DIO_GENOPTION_LEN) return;
|
|
length -= RPL_DIO_GENOPTION_LEN;
|
|
|
|
ND_TCHECK(opt->rpl_dio_len);
|
|
|
|
while((opt->rpl_dio_type == RPL_OPT_PAD0 &&
|
|
(const u_char *)opt < ndo->ndo_snapend) ||
|
|
ND_TTEST2(*opt,(opt->rpl_dio_len+2))) {
|
|
|
|
unsigned int optlen = opt->rpl_dio_len+2;
|
|
if(opt->rpl_dio_type == RPL_OPT_PAD0) {
|
|
optlen = 1;
|
|
ND_PRINT((ndo, " opt:pad0"));
|
|
} else {
|
|
ND_PRINT((ndo, " opt:%s len:%u ",
|
|
tok2str(rpl_subopt_values, "subopt:%u", opt->rpl_dio_type),
|
|
optlen));
|
|
if(ndo->ndo_vflag > 2) {
|
|
unsigned int paylen = opt->rpl_dio_len;
|
|
if(paylen > length) paylen = length;
|
|
hex_print(ndo,
|
|
" ",
|
|
((const uint8_t *)opt) + RPL_DIO_GENOPTION_LEN, /* content of DIO option */
|
|
paylen);
|
|
}
|
|
}
|
|
opt = (const struct rpl_dio_genoption *)(((const char *)opt) + optlen);
|
|
length -= optlen;
|
|
ND_TCHECK(opt->rpl_dio_len);
|
|
}
|
|
return;
|
|
trunc:
|
|
ND_PRINT((ndo, "%s", rpl_tstr));
|
|
return;
|
|
}
|
|
|
|
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(*dio);
|
|
dagid_str = ip6addr_string (ndo, dio->rpl_dagid);
|
|
|
|
ND_PRINT((ndo, " [dagid:%s,seq:%u,instance:%u,rank:%u,%smop:%s,prf:%u]",
|
|
dagid_str,
|
|
dio->rpl_dtsn,
|
|
dio->rpl_instanceid,
|
|
EXTRACT_16BITS(&dio->rpl_dagrank),
|
|
RPL_DIO_GROUNDED(dio->rpl_mopprf) ? "grounded,":"",
|
|
tok2str(rpl_mop_values, "mop%u", RPL_DIO_MOP(dio->rpl_mopprf)),
|
|
RPL_DIO_PRF(dio->rpl_mopprf)));
|
|
|
|
if(ndo->ndo_vflag > 1) {
|
|
const struct rpl_dio_genoption *opt = (const struct rpl_dio_genoption *)&dio[1];
|
|
rpl_dio_printopt(ndo, opt, length);
|
|
}
|
|
return;
|
|
trunc:
|
|
ND_PRINT((ndo, "%s", rpl_tstr));
|
|
return;
|
|
}
|
|
|
|
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>";
|
|
|
|
ND_TCHECK(*dao);
|
|
if (length < ND_RPL_DAO_MIN_LEN)
|
|
goto tooshort;
|
|
|
|
bp += ND_RPL_DAO_MIN_LEN;
|
|
length -= ND_RPL_DAO_MIN_LEN;
|
|
if(RPL_DAO_D(dao->rpl_flags)) {
|
|
ND_TCHECK2(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((ndo, " [dagid:%s,seq:%u,instance:%u%s%s,%02x]",
|
|
dagid_str,
|
|
dao->rpl_daoseq,
|
|
dao->rpl_instanceid,
|
|
RPL_DAO_K(dao->rpl_flags) ? ",acK":"",
|
|
RPL_DAO_D(dao->rpl_flags) ? ",Dagid":"",
|
|
dao->rpl_flags));
|
|
|
|
if(ndo->ndo_vflag > 1) {
|
|
const struct rpl_dio_genoption *opt = (const struct rpl_dio_genoption *)bp;
|
|
rpl_dio_printopt(ndo, opt, length);
|
|
}
|
|
return;
|
|
|
|
trunc:
|
|
ND_PRINT((ndo, "%s", rpl_tstr));
|
|
return;
|
|
|
|
tooshort:
|
|
ND_PRINT((ndo," [|length too short]"));
|
|
return;
|
|
}
|
|
|
|
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_TCHECK2(*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(daoack->rpl_flags)) {
|
|
ND_TCHECK2(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((ndo, " [dagid:%s,seq:%u,instance:%u,status:%u]",
|
|
dagid_str,
|
|
daoack->rpl_daoseq,
|
|
daoack->rpl_instanceid,
|
|
daoack->rpl_status));
|
|
|
|
/* no officially defined options for DAOACK, but print any we find */
|
|
if(ndo->ndo_vflag > 1) {
|
|
const struct rpl_dio_genoption *opt = (const struct rpl_dio_genoption *)bp;
|
|
rpl_dio_printopt(ndo, opt, length);
|
|
}
|
|
return;
|
|
|
|
trunc:
|
|
ND_PRINT((ndo, "%s", rpl_tstr));
|
|
return;
|
|
|
|
tooshort:
|
|
ND_PRINT((ndo," [|dao-length too short]"));
|
|
return;
|
|
}
|
|
|
|
static void
|
|
rpl_print(netdissect_options *ndo,
|
|
const struct icmp6_hdr *hdr,
|
|
const u_char *bp, u_int length)
|
|
{
|
|
int secured = hdr->icmp6_code & 0x80;
|
|
int basecode= hdr->icmp6_code & 0x7f;
|
|
|
|
if(secured) {
|
|
ND_PRINT((ndo, ", (SEC) [worktodo]"));
|
|
/* XXX
|
|
* the next header pointer needs to move forward to
|
|
* skip the secure part.
|
|
*/
|
|
return;
|
|
} else {
|
|
ND_PRINT((ndo, ", (CLR)"));
|
|
}
|
|
|
|
switch(basecode) {
|
|
case ND_RPL_DAG_IS:
|
|
ND_PRINT((ndo, "DODAG Information Solicitation"));
|
|
if(ndo->ndo_vflag) {
|
|
}
|
|
break;
|
|
case ND_RPL_DAG_IO:
|
|
ND_PRINT((ndo, "DODAG Information Object"));
|
|
if(ndo->ndo_vflag) {
|
|
rpl_dio_print(ndo, bp, length);
|
|
}
|
|
break;
|
|
case ND_RPL_DAO:
|
|
ND_PRINT((ndo, "Destination Advertisement Object"));
|
|
if(ndo->ndo_vflag) {
|
|
rpl_dao_print(ndo, bp, length);
|
|
}
|
|
break;
|
|
case ND_RPL_DAO_ACK:
|
|
ND_PRINT((ndo, "Destination Advertisement Object Ack"));
|
|
if(ndo->ndo_vflag) {
|
|
rpl_daoack_print(ndo, bp, length);
|
|
}
|
|
break;
|
|
default:
|
|
ND_PRINT((ndo, "RPL message, unknown code %u",hdr->icmp6_code));
|
|
break;
|
|
}
|
|
return;
|
|
|
|
#if 0
|
|
trunc:
|
|
ND_PRINT((ndo, "%s", rpl_tstr));
|
|
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;
|
|
const struct ip6_hdr *ip;
|
|
const struct ip6_hdr *oip;
|
|
const struct udphdr *ouh;
|
|
int dport;
|
|
const u_char *ep;
|
|
u_int prot;
|
|
|
|
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;
|
|
|
|
ND_TCHECK(dp->icmp6_cksum);
|
|
|
|
if (ndo->ndo_vflag && !fragmented) {
|
|
uint16_t sum, udp_sum;
|
|
|
|
if (ND_TTEST2(bp[0], length)) {
|
|
udp_sum = EXTRACT_16BITS(&dp->icmp6_cksum);
|
|
sum = icmp6_cksum(ndo, ip, dp, length);
|
|
if (sum != 0)
|
|
ND_PRINT((ndo,"[bad icmp6 cksum 0x%04x -> 0x%04x!] ",
|
|
udp_sum,
|
|
in_cksum_shouldbe(udp_sum, sum)));
|
|
else
|
|
ND_PRINT((ndo,"[icmp6 sum ok] "));
|
|
}
|
|
}
|
|
|
|
ND_PRINT((ndo,"ICMP6, %s", tok2str(icmp6_type_values,"unknown icmp6 type (%u)",dp->icmp6_type)));
|
|
|
|
/* display cosmetics: print the packet length for printer that use the vflag now */
|
|
if (ndo->ndo_vflag && (dp->icmp6_type == ND_ROUTER_SOLICIT ||
|
|
dp->icmp6_type == ND_ROUTER_ADVERT ||
|
|
dp->icmp6_type == ND_NEIGHBOR_ADVERT ||
|
|
dp->icmp6_type == ND_NEIGHBOR_SOLICIT ||
|
|
dp->icmp6_type == ND_REDIRECT ||
|
|
dp->icmp6_type == ICMP6_HADISCOV_REPLY ||
|
|
dp->icmp6_type == ICMP6_MOBILEPREFIX_ADVERT ))
|
|
ND_PRINT((ndo,", length %u", length));
|
|
|
|
switch (dp->icmp6_type) {
|
|
case ICMP6_DST_UNREACH:
|
|
ND_TCHECK(oip->ip6_dst);
|
|
ND_PRINT((ndo,", %s", tok2str(icmp6_dst_unreach_code_values,"unknown unreach code (%u)",dp->icmp6_code)));
|
|
switch (dp->icmp6_code) {
|
|
|
|
case ICMP6_DST_UNREACH_NOROUTE: /* fall through */
|
|
case ICMP6_DST_UNREACH_ADMIN:
|
|
case ICMP6_DST_UNREACH_ADDR:
|
|
ND_PRINT((ndo," %s",ip6addr_string(ndo, &oip->ip6_dst)));
|
|
break;
|
|
case ICMP6_DST_UNREACH_BEYONDSCOPE:
|
|
ND_PRINT((ndo," %s, source address %s",
|
|
ip6addr_string(ndo, &oip->ip6_dst),
|
|
ip6addr_string(ndo, &oip->ip6_src)));
|
|
break;
|
|
case ICMP6_DST_UNREACH_NOPORT:
|
|
if ((ouh = get_upperlayer(ndo, (const u_char *)oip, &prot))
|
|
== NULL)
|
|
goto trunc;
|
|
|
|
dport = EXTRACT_16BITS(&ouh->uh_dport);
|
|
switch (prot) {
|
|
case IPPROTO_TCP:
|
|
ND_PRINT((ndo,", %s tcp port %s",
|
|
ip6addr_string(ndo, &oip->ip6_dst),
|
|
tcpport_string(ndo, dport)));
|
|
break;
|
|
case IPPROTO_UDP:
|
|
ND_PRINT((ndo,", %s udp port %s",
|
|
ip6addr_string(ndo, &oip->ip6_dst),
|
|
udpport_string(ndo, dport)));
|
|
break;
|
|
default:
|
|
ND_PRINT((ndo,", %s protocol %d port %d unreachable",
|
|
ip6addr_string(ndo, &oip->ip6_dst),
|
|
oip->ip6_nxt, 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_TCHECK(dp->icmp6_mtu);
|
|
ND_PRINT((ndo,", mtu %u", EXTRACT_32BITS(&dp->icmp6_mtu)));
|
|
break;
|
|
case ICMP6_TIME_EXCEEDED:
|
|
ND_TCHECK(oip->ip6_dst);
|
|
switch (dp->icmp6_code) {
|
|
case ICMP6_TIME_EXCEED_TRANSIT:
|
|
ND_PRINT((ndo," for %s",
|
|
ip6addr_string(ndo, &oip->ip6_dst)));
|
|
break;
|
|
case ICMP6_TIME_EXCEED_REASSEMBLY:
|
|
ND_PRINT((ndo," (reassembly)"));
|
|
break;
|
|
default:
|
|
ND_PRINT((ndo,", unknown code (%u)", dp->icmp6_code));
|
|
break;
|
|
}
|
|
break;
|
|
case ICMP6_PARAM_PROB:
|
|
ND_TCHECK(oip->ip6_dst);
|
|
switch (dp->icmp6_code) {
|
|
case ICMP6_PARAMPROB_HEADER:
|
|
ND_PRINT((ndo,", erroneous - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)));
|
|
break;
|
|
case ICMP6_PARAMPROB_NEXTHEADER:
|
|
ND_PRINT((ndo,", next header - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)));
|
|
break;
|
|
case ICMP6_PARAMPROB_OPTION:
|
|
ND_PRINT((ndo,", option - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)));
|
|
break;
|
|
default:
|
|
ND_PRINT((ndo,", code-#%d",
|
|
dp->icmp6_code));
|
|
break;
|
|
}
|
|
break;
|
|
case ICMP6_ECHO_REQUEST:
|
|
case ICMP6_ECHO_REPLY:
|
|
ND_TCHECK(dp->icmp6_seq);
|
|
ND_PRINT((ndo,", seq %u", EXTRACT_16BITS(&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((ndo," v2"));
|
|
mldv2_query_print(ndo, (const u_char *)dp, length);
|
|
} else {
|
|
ND_PRINT((ndo," 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) {
|
|
icmp6_opt_print(ndo, (const u_char *)dp + RTSOLLEN,
|
|
length - RTSOLLEN);
|
|
}
|
|
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_TCHECK(p->nd_ra_retransmit);
|
|
ND_PRINT((ndo,"\n\thop limit %u, Flags [%s]" \
|
|
", pref %s, router lifetime %us, reachable time %ums, retrans timer %ums",
|
|
(u_int)p->nd_ra_curhoplimit,
|
|
bittok2str(icmp6_opt_ra_flag_values,"none",(p->nd_ra_flags_reserved)),
|
|
get_rtpref(p->nd_ra_flags_reserved),
|
|
EXTRACT_16BITS(&p->nd_ra_router_lifetime),
|
|
EXTRACT_32BITS(&p->nd_ra_reachable),
|
|
EXTRACT_32BITS(&p->nd_ra_retransmit)));
|
|
|
|
icmp6_opt_print(ndo, (const u_char *)dp + RTADVLEN,
|
|
length - RTADVLEN);
|
|
}
|
|
break;
|
|
case ND_NEIGHBOR_SOLICIT:
|
|
{
|
|
const struct nd_neighbor_solicit *p;
|
|
p = (const struct nd_neighbor_solicit *)dp;
|
|
ND_TCHECK(p->nd_ns_target);
|
|
ND_PRINT((ndo,", who has %s", ip6addr_string(ndo, &p->nd_ns_target)));
|
|
if (ndo->ndo_vflag) {
|
|
#define NDSOLLEN 24
|
|
icmp6_opt_print(ndo, (const u_char *)dp + NDSOLLEN,
|
|
length - NDSOLLEN);
|
|
}
|
|
}
|
|
break;
|
|
case ND_NEIGHBOR_ADVERT:
|
|
{
|
|
const struct nd_neighbor_advert *p;
|
|
|
|
p = (const struct nd_neighbor_advert *)dp;
|
|
ND_TCHECK(p->nd_na_target);
|
|
ND_PRINT((ndo,", tgt is %s",
|
|
ip6addr_string(ndo, &p->nd_na_target)));
|
|
if (ndo->ndo_vflag) {
|
|
ND_PRINT((ndo,", Flags [%s]",
|
|
bittok2str(icmp6_nd_na_flag_values,
|
|
"none",
|
|
EXTRACT_32BITS(&p->nd_na_flags_reserved))));
|
|
#define NDADVLEN 24
|
|
icmp6_opt_print(ndo, (const u_char *)dp + NDADVLEN,
|
|
length - NDADVLEN);
|
|
#undef NDADVLEN
|
|
}
|
|
}
|
|
break;
|
|
case ND_REDIRECT:
|
|
#define RDR(i) ((const struct nd_redirect *)(i))
|
|
ND_TCHECK(RDR(dp)->nd_rd_dst);
|
|
ND_PRINT((ndo,", %s", ip6addr_string(ndo, &RDR(dp)->nd_rd_dst)));
|
|
ND_TCHECK(RDR(dp)->nd_rd_target);
|
|
ND_PRINT((ndo," to %s",
|
|
ip6addr_string(ndo, &RDR(dp)->nd_rd_target)));
|
|
#define REDIRECTLEN 40
|
|
if (ndo->ndo_vflag) {
|
|
icmp6_opt_print(ndo, (const u_char *)dp + REDIRECTLEN,
|
|
length - REDIRECTLEN);
|
|
}
|
|
break;
|
|
#undef REDIRECTLEN
|
|
#undef RDR
|
|
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_TCHECK(dp->icmp6_data16[0]);
|
|
ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0])));
|
|
break;
|
|
case ICMP6_HADISCOV_REPLY:
|
|
if (ndo->ndo_vflag) {
|
|
const struct in6_addr *in6;
|
|
const u_char *cp;
|
|
|
|
ND_TCHECK(dp->icmp6_data16[0]);
|
|
ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0])));
|
|
cp = (const u_char *)dp + length;
|
|
in6 = (const struct in6_addr *)(dp + 1);
|
|
for (; (const u_char *)in6 < cp; in6++) {
|
|
ND_TCHECK(*in6);
|
|
ND_PRINT((ndo,", %s", ip6addr_string(ndo, in6)));
|
|
}
|
|
}
|
|
break;
|
|
case ICMP6_MOBILEPREFIX_ADVERT:
|
|
if (ndo->ndo_vflag) {
|
|
ND_TCHECK(dp->icmp6_data16[0]);
|
|
ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0])));
|
|
ND_TCHECK(dp->icmp6_data16[1]);
|
|
if (dp->icmp6_data16[1] & 0xc0)
|
|
ND_PRINT((ndo," "));
|
|
if (dp->icmp6_data16[1] & 0x80)
|
|
ND_PRINT((ndo,"M"));
|
|
if (dp->icmp6_data16[1] & 0x40)
|
|
ND_PRINT((ndo,"O"));
|
|
#define MPADVLEN 8
|
|
icmp6_opt_print(ndo, (const u_char *)dp + MPADVLEN,
|
|
length - MPADVLEN);
|
|
}
|
|
break;
|
|
case ND_RPL_MESSAGE:
|
|
/* plus 4, because struct icmp6_hdr contains 4 bytes of icmp payload */
|
|
rpl_print(ndo, dp, &dp->icmp6_data8[0], length-sizeof(struct icmp6_hdr)+4);
|
|
break;
|
|
default:
|
|
ND_PRINT((ndo,", length %u", length));
|
|
if (ndo->ndo_vflag <= 1)
|
|
print_unknown_data(ndo, bp,"\n\t", length);
|
|
return;
|
|
}
|
|
if (!ndo->ndo_vflag)
|
|
ND_PRINT((ndo,", length %u", length));
|
|
return;
|
|
trunc:
|
|
ND_PRINT((ndo, "%s", icmp6_tstr));
|
|
}
|
|
|
|
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(ip6->ip6_nxt))
|
|
return NULL;
|
|
|
|
nh = 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(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(hbh->ip6h_len))
|
|
return(NULL);
|
|
nh = hbh->ip6h_nxt;
|
|
hlen = (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(fragh->ip6f_offlg))
|
|
return(NULL);
|
|
/* fragments with non-zero offset are meaningless */
|
|
if ((EXTRACT_16BITS(&fragh->ip6f_offlg) & IP6F_OFF_MASK) != 0)
|
|
return(NULL);
|
|
nh = fragh->ip6f_nxt;
|
|
hlen = sizeof(struct ip6_frag);
|
|
break;
|
|
|
|
case IPPROTO_AH:
|
|
ah = (const struct ah *)bp;
|
|
if (!ND_TTEST(ah->ah_len))
|
|
return(NULL);
|
|
nh = ah->ah_nxt;
|
|
hlen = (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 void
|
|
icmp6_opt_print(netdissect_options *ndo, const u_char *bp, int resid)
|
|
{
|
|
const struct nd_opt_hdr *op;
|
|
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;
|
|
struct in6_addr in6;
|
|
const struct in6_addr *in6p;
|
|
size_t l;
|
|
u_int i;
|
|
|
|
#define ECHECK(var) if ((const u_char *)&(var) > ep - sizeof(var)) return
|
|
|
|
cp = bp;
|
|
/* 'ep' points to the end of available data. */
|
|
ep = ndo->ndo_snapend;
|
|
|
|
while (cp < ep) {
|
|
op = (const struct nd_opt_hdr *)cp;
|
|
|
|
ECHECK(op->nd_opt_len);
|
|
if (resid <= 0)
|
|
return;
|
|
if (op->nd_opt_len == 0)
|
|
goto trunc;
|
|
if (cp + (op->nd_opt_len << 3) > ep)
|
|
goto trunc;
|
|
|
|
ND_PRINT((ndo,"\n\t %s option (%u), length %u (%u): ",
|
|
tok2str(icmp6_opt_values, "unknown", op->nd_opt_type),
|
|
op->nd_opt_type,
|
|
op->nd_opt_len << 3,
|
|
op->nd_opt_len));
|
|
|
|
switch (op->nd_opt_type) {
|
|
case ND_OPT_SOURCE_LINKADDR:
|
|
l = (op->nd_opt_len << 3) - 2;
|
|
print_lladdr(ndo, cp + 2, l);
|
|
break;
|
|
case ND_OPT_TARGET_LINKADDR:
|
|
l = (op->nd_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_TCHECK(opp->nd_opt_pi_prefix);
|
|
ND_PRINT((ndo,"%s/%u%s, Flags [%s], valid time %s",
|
|
ip6addr_string(ndo, &opp->nd_opt_pi_prefix),
|
|
opp->nd_opt_pi_prefix_len,
|
|
(op->nd_opt_len != 4) ? "badlen" : "",
|
|
bittok2str(icmp6_opt_pi_flag_values, "none", opp->nd_opt_pi_flags_reserved),
|
|
get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_valid_time))));
|
|
ND_PRINT((ndo,", pref. time %s", get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_preferred_time))));
|
|
break;
|
|
case ND_OPT_REDIRECTED_HEADER:
|
|
print_unknown_data(ndo, bp,"\n\t ",op->nd_opt_len<<3);
|
|
/* xxx */
|
|
break;
|
|
case ND_OPT_MTU:
|
|
opm = (const struct nd_opt_mtu *)op;
|
|
ND_TCHECK(opm->nd_opt_mtu_mtu);
|
|
ND_PRINT((ndo," %u%s",
|
|
EXTRACT_32BITS(&opm->nd_opt_mtu_mtu),
|
|
(op->nd_opt_len != 1) ? "bad option length" : "" ));
|
|
break;
|
|
case ND_OPT_RDNSS:
|
|
oprd = (const struct nd_opt_rdnss *)op;
|
|
l = (op->nd_opt_len - 1) / 2;
|
|
ND_PRINT((ndo," lifetime %us,",
|
|
EXTRACT_32BITS(&oprd->nd_opt_rdnss_lifetime)));
|
|
for (i = 0; i < l; i++) {
|
|
ND_TCHECK(oprd->nd_opt_rdnss_addr[i]);
|
|
ND_PRINT((ndo," addr: %s",
|
|
ip6addr_string(ndo, &oprd->nd_opt_rdnss_addr[i])));
|
|
}
|
|
break;
|
|
case ND_OPT_DNSSL:
|
|
opds = (const struct nd_opt_dnssl *)op;
|
|
ND_PRINT((ndo," lifetime %us, domain(s):",
|
|
EXTRACT_32BITS(&opds->nd_opt_dnssl_lifetime)));
|
|
domp = cp + 8; /* domain names, variable-sized, RFC1035-encoded */
|
|
while (domp < cp + (op->nd_opt_len << 3) && *domp != '\0')
|
|
{
|
|
ND_PRINT((ndo, " "));
|
|
if ((domp = ns_nprint (ndo, domp, bp)) == NULL)
|
|
goto trunc;
|
|
}
|
|
break;
|
|
case ND_OPT_ADVINTERVAL:
|
|
opa = (const struct nd_opt_advinterval *)op;
|
|
ND_TCHECK(opa->nd_opt_adv_interval);
|
|
ND_PRINT((ndo," %ums", EXTRACT_32BITS(&opa->nd_opt_adv_interval)));
|
|
break;
|
|
case ND_OPT_HOMEAGENT_INFO:
|
|
oph = (const struct nd_opt_homeagent_info *)op;
|
|
ND_TCHECK(oph->nd_opt_hai_lifetime);
|
|
ND_PRINT((ndo," preference %u, lifetime %u",
|
|
EXTRACT_16BITS(&oph->nd_opt_hai_preference),
|
|
EXTRACT_16BITS(&oph->nd_opt_hai_lifetime)));
|
|
break;
|
|
case ND_OPT_ROUTE_INFO:
|
|
opri = (const struct nd_opt_route_info *)op;
|
|
ND_TCHECK(opri->nd_opt_rti_lifetime);
|
|
memset(&in6, 0, sizeof(in6));
|
|
in6p = (const struct in6_addr *)(opri + 1);
|
|
switch (op->nd_opt_len) {
|
|
case 1:
|
|
break;
|
|
case 2:
|
|
ND_TCHECK2(*in6p, 8);
|
|
memcpy(&in6, opri + 1, 8);
|
|
break;
|
|
case 3:
|
|
ND_TCHECK(*in6p);
|
|
memcpy(&in6, opri + 1, sizeof(in6));
|
|
break;
|
|
default:
|
|
goto trunc;
|
|
}
|
|
ND_PRINT((ndo," %s/%u", ip6addr_string(ndo, &in6),
|
|
opri->nd_opt_rti_prefixlen));
|
|
ND_PRINT((ndo,", pref=%s", get_rtpref(opri->nd_opt_rti_flags)));
|
|
ND_PRINT((ndo,", lifetime=%s",
|
|
get_lifetime(EXTRACT_32BITS(&opri->nd_opt_rti_lifetime))));
|
|
break;
|
|
default:
|
|
if (ndo->ndo_vflag <= 1) {
|
|
print_unknown_data(ndo,cp+2,"\n\t ", (op->nd_opt_len << 3) - 2); /* skip option header */
|
|
return;
|
|
}
|
|
break;
|
|
}
|
|
/* do we want to see an additional hexdump ? */
|
|
if (ndo->ndo_vflag> 1)
|
|
print_unknown_data(ndo, cp+2,"\n\t ", (op->nd_opt_len << 3) - 2); /* skip option header */
|
|
|
|
cp += op->nd_opt_len << 3;
|
|
resid -= op->nd_opt_len << 3;
|
|
}
|
|
return;
|
|
|
|
trunc:
|
|
ND_PRINT((ndo, "%s", icmp6_tstr));
|
|
return;
|
|
#undef ECHECK
|
|
}
|
|
|
|
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((ndo,"max resp delay: %d ", EXTRACT_16BITS(&mp->mld6_maxdelay)));
|
|
ND_PRINT((ndo,"addr: %s", ip6addr_string(ndo, &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((ndo," [invalid len %d]", len));
|
|
return;
|
|
}
|
|
|
|
ND_TCHECK(icp->icmp6_data16[1]);
|
|
ngroups = EXTRACT_16BITS(&icp->icmp6_data16[1]);
|
|
ND_PRINT((ndo,", %d 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((ndo," [invalid number of groups]"));
|
|
return;
|
|
}
|
|
ND_TCHECK2(bp[group + 4], sizeof(struct in6_addr));
|
|
ND_PRINT((ndo," [gaddr %s", ip6addr_string(ndo, &bp[group + 4])));
|
|
ND_PRINT((ndo," %s", tok2str(mldv2report2str, " [v2-report-#%d]",
|
|
bp[group])));
|
|
nsrcs = (bp[group + 2] << 8) + bp[group + 3];
|
|
/* Check the number of sources and print them */
|
|
if (len < group + 20 + (nsrcs * sizeof(struct in6_addr))) {
|
|
ND_PRINT((ndo," [invalid number of sources %d]", nsrcs));
|
|
return;
|
|
}
|
|
if (ndo->ndo_vflag == 1)
|
|
ND_PRINT((ndo,", %d source(s)", nsrcs));
|
|
else {
|
|
/* Print the sources */
|
|
ND_PRINT((ndo," {"));
|
|
for (j = 0; j < nsrcs; j++) {
|
|
ND_TCHECK2(bp[group + 20 + j * sizeof(struct in6_addr)],
|
|
sizeof(struct in6_addr));
|
|
ND_PRINT((ndo," %s", ip6addr_string(ndo, &bp[group + 20 + j * sizeof(struct in6_addr)])));
|
|
}
|
|
ND_PRINT((ndo," }"));
|
|
}
|
|
/* Next group record */
|
|
group += 20 + nsrcs * sizeof(struct in6_addr);
|
|
ND_PRINT((ndo,"]"));
|
|
}
|
|
}
|
|
return;
|
|
trunc:
|
|
ND_PRINT((ndo, "%s", mldv2_tstr));
|
|
return;
|
|
}
|
|
|
|
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;
|
|
int mrt, qqi;
|
|
u_int nsrcs;
|
|
register u_int i;
|
|
|
|
/* Minimum len is 28 */
|
|
if (len < 28) {
|
|
ND_PRINT((ndo," [invalid len %d]", len));
|
|
return;
|
|
}
|
|
ND_TCHECK(icp->icmp6_data16[0]);
|
|
mrc = EXTRACT_16BITS(&icp->icmp6_data16[0]);
|
|
if (mrc < 32768) {
|
|
mrt = mrc;
|
|
} else {
|
|
mrt = ((mrc & 0x0fff) | 0x1000) << (((mrc & 0x7000) >> 12) + 3);
|
|
}
|
|
if (ndo->ndo_vflag) {
|
|
ND_PRINT((ndo," [max resp delay=%d]", mrt));
|
|
}
|
|
ND_TCHECK2(bp[8], sizeof(struct in6_addr));
|
|
ND_PRINT((ndo," [gaddr %s", ip6addr_string(ndo, &bp[8])));
|
|
|
|
if (ndo->ndo_vflag) {
|
|
ND_TCHECK(bp[25]);
|
|
if (bp[24] & 0x08) {
|
|
ND_PRINT((ndo," sflag"));
|
|
}
|
|
if (bp[24] & 0x07) {
|
|
ND_PRINT((ndo," robustness=%d", bp[24] & 0x07));
|
|
}
|
|
if (bp[25] < 128) {
|
|
qqi = bp[25];
|
|
} else {
|
|
qqi = ((bp[25] & 0x0f) | 0x10) << (((bp[25] & 0x70) >> 4) + 3);
|
|
}
|
|
ND_PRINT((ndo," qqi=%d", qqi));
|
|
}
|
|
|
|
ND_TCHECK2(bp[26], 2);
|
|
nsrcs = EXTRACT_16BITS(&bp[26]);
|
|
if (nsrcs > 0) {
|
|
if (len < 28 + nsrcs * sizeof(struct in6_addr))
|
|
ND_PRINT((ndo," [invalid number of sources]"));
|
|
else if (ndo->ndo_vflag > 1) {
|
|
ND_PRINT((ndo," {"));
|
|
for (i = 0; i < nsrcs; i++) {
|
|
ND_TCHECK2(bp[28 + i * sizeof(struct in6_addr)],
|
|
sizeof(struct in6_addr));
|
|
ND_PRINT((ndo," %s", ip6addr_string(ndo, &bp[28 + i * sizeof(struct in6_addr)])));
|
|
}
|
|
ND_PRINT((ndo," }"));
|
|
} else
|
|
ND_PRINT((ndo,", %d source(s)", nsrcs));
|
|
}
|
|
ND_PRINT((ndo,"]"));
|
|
return;
|
|
trunc:
|
|
ND_PRINT((ndo, "%s", mldv2_tstr));
|
|
return;
|
|
}
|
|
|
|
static void
|
|
dnsname_print(netdissect_options *ndo, const u_char *cp, const u_char *ep)
|
|
{
|
|
int i;
|
|
|
|
/* DNS name decoding - no decompression */
|
|
ND_PRINT((ndo,", \""));
|
|
while (cp < ep) {
|
|
i = *cp++;
|
|
if (i) {
|
|
if (i > ep - cp) {
|
|
ND_PRINT((ndo,"???"));
|
|
break;
|
|
}
|
|
while (i-- && cp < ep) {
|
|
safeputchar(ndo, *cp);
|
|
cp++;
|
|
}
|
|
if (cp + 1 < ep && *cp)
|
|
ND_PRINT((ndo,"."));
|
|
} else {
|
|
if (cp == ep) {
|
|
/* FQDN */
|
|
ND_PRINT((ndo,"."));
|
|
} else if (cp + 1 == ep && *cp == '\0') {
|
|
/* truncated */
|
|
} else {
|
|
/* invalid */
|
|
ND_PRINT((ndo,"???"));
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
ND_PRINT((ndo,"\""));
|
|
}
|
|
|
|
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 (ni6->ni_type) {
|
|
case ICMP6_NI_QUERY:
|
|
if (siz == sizeof(*dp) + 4) {
|
|
/* KAME who-are-you */
|
|
ND_PRINT((ndo," who-are-you request"));
|
|
break;
|
|
}
|
|
ND_PRINT((ndo," node information query"));
|
|
|
|
ND_TCHECK2(*dp, sizeof(*ni6));
|
|
ni6 = (const struct icmp6_nodeinfo *)dp;
|
|
ND_PRINT((ndo," (")); /*)*/
|
|
switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
|
|
case NI_QTYPE_NOOP:
|
|
ND_PRINT((ndo,"noop"));
|
|
break;
|
|
case NI_QTYPE_SUPTYPES:
|
|
ND_PRINT((ndo,"supported qtypes"));
|
|
i = EXTRACT_16BITS(&ni6->ni_flags);
|
|
if (i)
|
|
ND_PRINT((ndo," [%s]", (i & 0x01) ? "C" : ""));
|
|
break;
|
|
case NI_QTYPE_FQDN:
|
|
ND_PRINT((ndo,"DNS name"));
|
|
break;
|
|
case NI_QTYPE_NODEADDR:
|
|
ND_PRINT((ndo,"node addresses"));
|
|
i = ni6->ni_flags;
|
|
if (!i)
|
|
break;
|
|
/* NI_NODEADDR_FLAG_TRUNCATE undefined for query */
|
|
ND_PRINT((ndo," [%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((ndo,"unknown"));
|
|
break;
|
|
}
|
|
|
|
if (ni6->ni_qtype == NI_QTYPE_NOOP ||
|
|
ni6->ni_qtype == NI_QTYPE_SUPTYPES) {
|
|
if (siz != sizeof(*ni6))
|
|
if (ndo->ndo_vflag)
|
|
ND_PRINT((ndo,", invalid len"));
|
|
/*(*/
|
|
ND_PRINT((ndo,")"));
|
|
break;
|
|
}
|
|
|
|
|
|
/* XXX backward compat, icmp-name-lookup-03 */
|
|
if (siz == sizeof(*ni6)) {
|
|
ND_PRINT((ndo,", 03 draft"));
|
|
/*(*/
|
|
ND_PRINT((ndo,")"));
|
|
break;
|
|
}
|
|
|
|
switch (ni6->ni_code) {
|
|
case ICMP6_NI_SUBJ_IPV6:
|
|
if (!ND_TTEST2(*dp,
|
|
sizeof(*ni6) + sizeof(struct in6_addr)))
|
|
break;
|
|
if (siz != sizeof(*ni6) + sizeof(struct in6_addr)) {
|
|
if (ndo->ndo_vflag)
|
|
ND_PRINT((ndo,", invalid subject len"));
|
|
break;
|
|
}
|
|
ND_PRINT((ndo,", subject=%s",
|
|
ip6addr_string(ndo, ni6 + 1)));
|
|
break;
|
|
case ICMP6_NI_SUBJ_FQDN:
|
|
ND_PRINT((ndo,", subject=DNS name"));
|
|
cp = (const u_char *)(ni6 + 1);
|
|
if (cp[0] == ep - cp - 1) {
|
|
/* icmp-name-lookup-03, pascal string */
|
|
if (ndo->ndo_vflag)
|
|
ND_PRINT((ndo,", 03 draft"));
|
|
cp++;
|
|
ND_PRINT((ndo,", \""));
|
|
while (cp < ep) {
|
|
safeputchar(ndo, *cp);
|
|
cp++;
|
|
}
|
|
ND_PRINT((ndo,"\""));
|
|
} else
|
|
dnsname_print(ndo, cp, ep);
|
|
break;
|
|
case ICMP6_NI_SUBJ_IPV4:
|
|
if (!ND_TTEST2(*dp, sizeof(*ni6) + sizeof(struct in_addr)))
|
|
break;
|
|
if (siz != sizeof(*ni6) + sizeof(struct in_addr)) {
|
|
if (ndo->ndo_vflag)
|
|
ND_PRINT((ndo,", invalid subject len"));
|
|
break;
|
|
}
|
|
ND_PRINT((ndo,", subject=%s",
|
|
ipaddr_string(ndo, ni6 + 1)));
|
|
break;
|
|
default:
|
|
ND_PRINT((ndo,", unknown subject"));
|
|
break;
|
|
}
|
|
|
|
/*(*/
|
|
ND_PRINT((ndo,")"));
|
|
break;
|
|
|
|
case ICMP6_NI_REPLY:
|
|
if (icmp6len > siz) {
|
|
ND_PRINT((ndo,"[|icmp6: node information reply]"));
|
|
break;
|
|
}
|
|
|
|
needcomma = 0;
|
|
|
|
ND_TCHECK2(*dp, sizeof(*ni6));
|
|
ni6 = (const struct icmp6_nodeinfo *)dp;
|
|
ND_PRINT((ndo," node information reply"));
|
|
ND_PRINT((ndo," (")); /*)*/
|
|
switch (ni6->ni_code) {
|
|
case ICMP6_NI_SUCCESS:
|
|
if (ndo->ndo_vflag) {
|
|
ND_PRINT((ndo,"success"));
|
|
needcomma++;
|
|
}
|
|
break;
|
|
case ICMP6_NI_REFUSED:
|
|
ND_PRINT((ndo,"refused"));
|
|
needcomma++;
|
|
if (siz != sizeof(*ni6))
|
|
if (ndo->ndo_vflag)
|
|
ND_PRINT((ndo,", invalid length"));
|
|
break;
|
|
case ICMP6_NI_UNKNOWN:
|
|
ND_PRINT((ndo,"unknown"));
|
|
needcomma++;
|
|
if (siz != sizeof(*ni6))
|
|
if (ndo->ndo_vflag)
|
|
ND_PRINT((ndo,", invalid length"));
|
|
break;
|
|
}
|
|
|
|
if (ni6->ni_code != ICMP6_NI_SUCCESS) {
|
|
/*(*/
|
|
ND_PRINT((ndo,")"));
|
|
break;
|
|
}
|
|
|
|
switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
|
|
case NI_QTYPE_NOOP:
|
|
if (needcomma)
|
|
ND_PRINT((ndo,", "));
|
|
ND_PRINT((ndo,"noop"));
|
|
if (siz != sizeof(*ni6))
|
|
if (ndo->ndo_vflag)
|
|
ND_PRINT((ndo,", invalid length"));
|
|
break;
|
|
case NI_QTYPE_SUPTYPES:
|
|
if (needcomma)
|
|
ND_PRINT((ndo,", "));
|
|
ND_PRINT((ndo,"supported qtypes"));
|
|
i = EXTRACT_16BITS(&ni6->ni_flags);
|
|
if (i)
|
|
ND_PRINT((ndo," [%s]", (i & 0x01) ? "C" : ""));
|
|
break;
|
|
case NI_QTYPE_FQDN:
|
|
if (needcomma)
|
|
ND_PRINT((ndo,", "));
|
|
ND_PRINT((ndo,"DNS name"));
|
|
cp = (const u_char *)(ni6 + 1) + 4;
|
|
ND_TCHECK(cp[0]);
|
|
if (cp[0] == ep - cp - 1) {
|
|
/* icmp-name-lookup-03, pascal string */
|
|
if (ndo->ndo_vflag)
|
|
ND_PRINT((ndo,", 03 draft"));
|
|
cp++;
|
|
ND_PRINT((ndo,", \""));
|
|
while (cp < ep) {
|
|
safeputchar(ndo, *cp);
|
|
cp++;
|
|
}
|
|
ND_PRINT((ndo,"\""));
|
|
} else
|
|
dnsname_print(ndo, cp, ep);
|
|
if ((EXTRACT_16BITS(&ni6->ni_flags) & 0x01) != 0)
|
|
ND_PRINT((ndo," [TTL=%u]", EXTRACT_32BITS(ni6 + 1)));
|
|
break;
|
|
case NI_QTYPE_NODEADDR:
|
|
if (needcomma)
|
|
ND_PRINT((ndo,", "));
|
|
ND_PRINT((ndo,"node addresses"));
|
|
i = sizeof(*ni6);
|
|
while (i < siz) {
|
|
if (i + sizeof(struct in6_addr) + sizeof(int32_t) > siz)
|
|
break;
|
|
ND_PRINT((ndo," %s", ip6addr_string(ndo, bp + i)));
|
|
i += sizeof(struct in6_addr);
|
|
ND_PRINT((ndo,"(%d)", (int32_t)EXTRACT_32BITS(bp + i)));
|
|
i += sizeof(int32_t);
|
|
}
|
|
i = ni6->ni_flags;
|
|
if (!i)
|
|
break;
|
|
ND_PRINT((ndo," [%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((ndo,", "));
|
|
ND_PRINT((ndo,"unknown"));
|
|
break;
|
|
}
|
|
|
|
/*(*/
|
|
ND_PRINT((ndo,")"));
|
|
break;
|
|
}
|
|
return;
|
|
|
|
trunc:
|
|
ND_PRINT((ndo, "%s", icmp6_tstr));
|
|
}
|
|
|
|
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(rr6->rr_reserved);
|
|
switch (rr6->rr_code) {
|
|
case ICMP6_ROUTER_RENUMBERING_COMMAND:
|
|
ND_PRINT((ndo,"router renum: command"));
|
|
break;
|
|
case ICMP6_ROUTER_RENUMBERING_RESULT:
|
|
ND_PRINT((ndo,"router renum: result"));
|
|
break;
|
|
case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET:
|
|
ND_PRINT((ndo,"router renum: sequence number reset"));
|
|
break;
|
|
default:
|
|
ND_PRINT((ndo,"router renum: code-#%d", rr6->rr_code));
|
|
break;
|
|
}
|
|
|
|
ND_PRINT((ndo,", seq=%u", EXTRACT_32BITS(&rr6->rr_seqnum)));
|
|
|
|
if (ndo->ndo_vflag) {
|
|
#define F(x, y) ((rr6->rr_flags) & (x) ? (y) : "")
|
|
ND_PRINT((ndo,"[")); /*]*/
|
|
if (rr6->rr_flags) {
|
|
ND_PRINT((ndo,"%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((ndo,"seg=%u,", rr6->rr_segnum));
|
|
ND_PRINT((ndo,"maxdelay=%u", EXTRACT_16BITS(&rr6->rr_maxdelay)));
|
|
if (rr6->rr_reserved)
|
|
ND_PRINT((ndo,"rsvd=0x%x", EXTRACT_32BITS(&rr6->rr_reserved)));
|
|
/*[*/
|
|
ND_PRINT((ndo,"]"));
|
|
#undef F
|
|
}
|
|
|
|
if (rr6->rr_code == ICMP6_ROUTER_RENUMBERING_COMMAND) {
|
|
match = (const struct rr_pco_match *)cp;
|
|
cp = (const char *)(match + 1);
|
|
|
|
ND_TCHECK(match->rpm_prefix);
|
|
|
|
if (ndo->ndo_vflag > 1)
|
|
ND_PRINT((ndo,"\n\t"));
|
|
else
|
|
ND_PRINT((ndo," "));
|
|
ND_PRINT((ndo,"match(")); /*)*/
|
|
switch (match->rpm_code) {
|
|
case RPM_PCO_ADD: ND_PRINT((ndo,"add")); break;
|
|
case RPM_PCO_CHANGE: ND_PRINT((ndo,"change")); break;
|
|
case RPM_PCO_SETGLOBAL: ND_PRINT((ndo,"setglobal")); break;
|
|
default: ND_PRINT((ndo,"#%u", match->rpm_code)); break;
|
|
}
|
|
|
|
if (ndo->ndo_vflag) {
|
|
ND_PRINT((ndo,",ord=%u", match->rpm_ordinal));
|
|
ND_PRINT((ndo,",min=%u", match->rpm_minlen));
|
|
ND_PRINT((ndo,",max=%u", match->rpm_maxlen));
|
|
}
|
|
if (addrtostr6(&match->rpm_prefix, hbuf, sizeof(hbuf)))
|
|
ND_PRINT((ndo,",%s/%u", hbuf, match->rpm_matchlen));
|
|
else
|
|
ND_PRINT((ndo,",?/%u", match->rpm_matchlen));
|
|
/*(*/
|
|
ND_PRINT((ndo,")"));
|
|
|
|
n = 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(use->rpu_prefix);
|
|
|
|
if (ndo->ndo_vflag > 1)
|
|
ND_PRINT((ndo,"\n\t"));
|
|
else
|
|
ND_PRINT((ndo," "));
|
|
ND_PRINT((ndo,"use(")); /*)*/
|
|
if (use->rpu_flags) {
|
|
#define F(x, y) ((use->rpu_flags) & (x) ? (y) : "")
|
|
ND_PRINT((ndo,"%s%s,",
|
|
F(ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME, "V"),
|
|
F(ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME, "P")));
|
|
#undef F
|
|
}
|
|
if (ndo->ndo_vflag) {
|
|
ND_PRINT((ndo,"mask=0x%x,", use->rpu_ramask));
|
|
ND_PRINT((ndo,"raflags=0x%x,", use->rpu_raflags));
|
|
if (~use->rpu_vltime == 0)
|
|
ND_PRINT((ndo,"vltime=infty,"));
|
|
else
|
|
ND_PRINT((ndo,"vltime=%u,",
|
|
EXTRACT_32BITS(&use->rpu_vltime)));
|
|
if (~use->rpu_pltime == 0)
|
|
ND_PRINT((ndo,"pltime=infty,"));
|
|
else
|
|
ND_PRINT((ndo,"pltime=%u,",
|
|
EXTRACT_32BITS(&use->rpu_pltime)));
|
|
}
|
|
if (addrtostr6(&use->rpu_prefix, hbuf, sizeof(hbuf)))
|
|
ND_PRINT((ndo,"%s/%u/%u", hbuf, use->rpu_uselen,
|
|
use->rpu_keeplen));
|
|
else
|
|
ND_PRINT((ndo,"?/%u/%u", use->rpu_uselen,
|
|
use->rpu_keeplen));
|
|
/*(*/
|
|
ND_PRINT((ndo,")"));
|
|
}
|
|
}
|
|
|
|
return;
|
|
|
|
trunc:
|
|
ND_PRINT((ndo, "%s", icmp6_tstr));
|
|
}
|
|
|
|
/*
|
|
* Local Variables:
|
|
* c-style: whitesmith
|
|
* c-basic-offset: 8
|
|
* End:
|
|
*/
|