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print-icmp6.c
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/*
* Copyright (c) 1988, 1989, 1990, 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that: (1) source code distributions
* retain the above copyright notice and this paragraph in its entirety, (2)
* distributions including binary code include the above copyright notice and
* this paragraph in its entirety in the documentation or other materials
* provided with the distribution, and (3) all advertising materials mentioning
* features or use of this software display the following acknowledgement:
* ``This product includes software developed by the University of California,
* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
* the University nor the names of its contributors may be used to endorse
* or promote products derived from this software without specific prior
* written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
/* \summary: IPv6 Internet Control Message Protocol (ICMPv6) printer */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "netdissect-stdinc.h"
#include <stdio.h>
#include <string.h>
#include "netdissect.h"
#include "addrtoname.h"
#include "addrtostr.h"
#include "extract.h"
#include "ip6.h"
#include "ipproto.h"
#include "udp.h"
#include "ah.h"
/* NetBSD: icmp6.h,v 1.13 2000/08/03 16:30:37 itojun Exp */
/* $KAME: icmp6.h,v 1.22 2000/08/03 15:25:16 jinmei Exp $ */
/*
* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the project nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
struct icmp6_hdr {
nd_uint8_t icmp6_type; /* type field */
nd_uint8_t icmp6_code; /* code field */
nd_uint16_t icmp6_cksum; /* checksum field */
union {
nd_uint32_t icmp6_un_data32[1]; /* type-specific field */
nd_uint16_t icmp6_un_data16[2]; /* type-specific field */
nd_uint8_t icmp6_un_data8[4]; /* type-specific field */
nd_byte icmp6_un_data[1]; /* type-specific field */
} icmp6_dataun;
};
#define icmp6_data32 icmp6_dataun.icmp6_un_data32
#define icmp6_data16 icmp6_dataun.icmp6_un_data16
#define icmp6_data8 icmp6_dataun.icmp6_un_data8
#define icmp6_data icmp6_dataun.icmp6_un_data
#define icmp6_pptr icmp6_data32[0] /* parameter prob */
#define icmp6_mtu icmp6_data32[0] /* packet too big */
#define icmp6_id icmp6_data16[0] /* echo request/reply */
#define icmp6_seq icmp6_data16[1] /* echo request/reply */
#define icmp6_maxdelay icmp6_data16[0] /* mcast group membership */
#define ICMP6_DST_UNREACH 1 /* dest unreachable, codes: */
#define ICMP6_PACKET_TOO_BIG 2 /* packet too big */
#define ICMP6_TIME_EXCEEDED 3 /* time exceeded, code: */
#define ICMP6_PARAM_PROB 4 /* ip6 header bad */
#define ICMP6_ECHO_REQUEST 128 /* echo service */
#define ICMP6_ECHO_REPLY 129 /* echo reply */
#define ICMP6_MEMBERSHIP_QUERY 130 /* group membership query */
#define MLD6_LISTENER_QUERY 130 /* multicast listener query */
#define ICMP6_MEMBERSHIP_REPORT 131 /* group membership report */
#define MLD6_LISTENER_REPORT 131 /* multicast listener report */
#define ICMP6_MEMBERSHIP_REDUCTION 132 /* group membership termination */
#define MLD6_LISTENER_DONE 132 /* multicast listener done */
#define ND_ROUTER_SOLICIT 133 /* router solicitation */
#define ND_ROUTER_ADVERT 134 /* router advertisement */
#define ND_NEIGHBOR_SOLICIT 135 /* neighbor solicitation */
#define ND_NEIGHBOR_ADVERT 136 /* neighbor advertisement */
#define ND_REDIRECT 137 /* redirect */
#define ICMP6_ROUTER_RENUMBERING 138 /* router renumbering */
#define ICMP6_WRUREQUEST 139 /* who are you request */
#define ICMP6_WRUREPLY 140 /* who are you reply */
#define ICMP6_FQDN_QUERY 139 /* FQDN query */
#define ICMP6_FQDN_REPLY 140 /* FQDN reply */
#define ICMP6_NI_QUERY 139 /* node information request - RFC 4620 */
#define ICMP6_NI_REPLY 140 /* node information reply - RFC 4620 */
#define IND_SOLICIT 141 /* inverse neighbor solicitation */
#define IND_ADVERT 142 /* inverse neighbor advertisement */
#define ICMP6_V2_MEMBERSHIP_REPORT 143 /* v2 membership report */
#define MLDV2_LISTENER_REPORT 143 /* v2 multicast listener report */
#define ICMP6_HADISCOV_REQUEST 144
#define ICMP6_HADISCOV_REPLY 145
#define ICMP6_MOBILEPREFIX_SOLICIT 146
#define ICMP6_MOBILEPREFIX_ADVERT 147
#define MLD6_MTRACE_RESP 200 /* mtrace response(to sender) */
#define MLD6_MTRACE 201 /* mtrace messages */
#define ICMP6_MAXTYPE 201
#define ICMP6_DST_UNREACH_NOROUTE 0 /* no route to destination */
#define ICMP6_DST_UNREACH_ADMIN 1 /* administratively prohibited */
#define ICMP6_DST_UNREACH_NOTNEIGHBOR 2 /* not a neighbor(obsolete) */
#define ICMP6_DST_UNREACH_BEYONDSCOPE 2 /* beyond scope of source address */
#define ICMP6_DST_UNREACH_ADDR 3 /* address unreachable */
#define ICMP6_DST_UNREACH_NOPORT 4 /* port unreachable */
#define ICMP6_TIME_EXCEED_TRANSIT 0 /* ttl==0 in transit */
#define ICMP6_TIME_EXCEED_REASSEMBLY 1 /* ttl==0 in reass */
#define ICMP6_PARAMPROB_HEADER 0 /* erroneous header field */
#define ICMP6_PARAMPROB_NEXTHEADER 1 /* unrecognized next header */
#define ICMP6_PARAMPROB_OPTION 2 /* unrecognized option */
#define ICMP6_PARAMPROB_FRAGHDRCHAIN 3 /* incomplete header chain */
#define ICMP6_INFOMSG_MASK 0x80 /* all informational messages */
#define ICMP6_NI_SUBJ_IPV6 0 /* Query Subject is an IPv6 address */
#define ICMP6_NI_SUBJ_FQDN 1 /* Query Subject is a Domain name */
#define ICMP6_NI_SUBJ_IPV4 2 /* Query Subject is an IPv4 address */
#define ICMP6_NI_SUCCESS 0 /* node information successful reply */
#define ICMP6_NI_REFUSED 1 /* node information request is refused */
#define ICMP6_NI_UNKNOWN 2 /* unknown Qtype */
#define ICMP6_ROUTER_RENUMBERING_COMMAND 0 /* rr command */
#define ICMP6_ROUTER_RENUMBERING_RESULT 1 /* rr result */
#define ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET 255 /* rr seq num reset */
/* Used in kernel only */
#define ND_REDIRECT_ONLINK 0 /* redirect to an on-link node */
#define ND_REDIRECT_ROUTER 1 /* redirect to a better router */
/*
* Multicast Listener Discovery
*/
struct mld6_hdr {
struct icmp6_hdr mld6_hdr;
nd_ipv6 mld6_addr; /* multicast address */
};
#define mld6_type mld6_hdr.icmp6_type
#define mld6_code mld6_hdr.icmp6_code
#define mld6_cksum mld6_hdr.icmp6_cksum
#define mld6_maxdelay mld6_hdr.icmp6_data16[0]
#define mld6_reserved mld6_hdr.icmp6_data16[1]
#define MLD_MINLEN 24
#define MLDV2_MINLEN 28
/*
* Neighbor Discovery
*/
struct nd_router_solicit { /* router solicitation */
struct icmp6_hdr nd_rs_hdr;
/* could be followed by options */
};
#define nd_rs_type nd_rs_hdr.icmp6_type
#define nd_rs_code nd_rs_hdr.icmp6_code
#define nd_rs_cksum nd_rs_hdr.icmp6_cksum
#define nd_rs_reserved nd_rs_hdr.icmp6_data32[0]
struct nd_router_advert { /* router advertisement */
struct icmp6_hdr nd_ra_hdr;
nd_uint32_t nd_ra_reachable; /* reachable time */
nd_uint32_t nd_ra_retransmit; /* retransmit timer */
/* could be followed by options */
};
#define nd_ra_type nd_ra_hdr.icmp6_type
#define nd_ra_code nd_ra_hdr.icmp6_code
#define nd_ra_cksum nd_ra_hdr.icmp6_cksum
#define nd_ra_curhoplimit nd_ra_hdr.icmp6_data8[0]
#define nd_ra_flags_reserved nd_ra_hdr.icmp6_data8[1]
#define ND_RA_FLAG_MANAGED 0x80
#define ND_RA_FLAG_OTHER 0x40
#define ND_RA_FLAG_HOME_AGENT 0x20
#define ND_RA_FLAG_IPV6ONLY 0x02
/*
* Router preference values based on draft-draves-ipngwg-router-selection-01.
* These are non-standard definitions.
*/
#define ND_RA_FLAG_RTPREF_MASK 0x18 /* 00011000 */
#define ND_RA_FLAG_RTPREF_HIGH 0x08 /* 00001000 */
#define ND_RA_FLAG_RTPREF_MEDIUM 0x00 /* 00000000 */
#define ND_RA_FLAG_RTPREF_LOW 0x18 /* 00011000 */
#define ND_RA_FLAG_RTPREF_RSV 0x10 /* 00010000 */
#define nd_ra_router_lifetime nd_ra_hdr.icmp6_data16[1]
struct nd_neighbor_solicit { /* neighbor solicitation */
struct icmp6_hdr nd_ns_hdr;
nd_ipv6 nd_ns_target; /*target address */
/* could be followed by options */
};
#define nd_ns_type nd_ns_hdr.icmp6_type
#define nd_ns_code nd_ns_hdr.icmp6_code
#define nd_ns_cksum nd_ns_hdr.icmp6_cksum
#define nd_ns_reserved nd_ns_hdr.icmp6_data32[0]
struct nd_neighbor_advert { /* neighbor advertisement */
struct icmp6_hdr nd_na_hdr;
nd_ipv6 nd_na_target; /* target address */
/* could be followed by options */
};
#define nd_na_type nd_na_hdr.icmp6_type
#define nd_na_code nd_na_hdr.icmp6_code
#define nd_na_cksum nd_na_hdr.icmp6_cksum
#define nd_na_flags_reserved nd_na_hdr.icmp6_data32[0]
#define ND_NA_FLAG_ROUTER 0x80000000
#define ND_NA_FLAG_SOLICITED 0x40000000
#define ND_NA_FLAG_OVERRIDE 0x20000000
struct nd_redirect { /* redirect */
struct icmp6_hdr nd_rd_hdr;
nd_ipv6 nd_rd_target; /* target address */
nd_ipv6 nd_rd_dst; /* destination address */
/* could be followed by options */
};
#define nd_rd_type nd_rd_hdr.icmp6_type
#define nd_rd_code nd_rd_hdr.icmp6_code
#define nd_rd_cksum nd_rd_hdr.icmp6_cksum
#define nd_rd_reserved nd_rd_hdr.icmp6_data32[0]
struct nd_opt_hdr { /* Neighbor discovery option header */
nd_uint8_t nd_opt_type;
nd_uint8_t nd_opt_len;
/* followed by option specific data*/
};
#define ND_OPT_SOURCE_LINKADDR 1
#define ND_OPT_TARGET_LINKADDR 2
#define ND_OPT_PREFIX_INFORMATION 3
#define ND_OPT_REDIRECTED_HEADER 4
#define ND_OPT_MTU 5
#define ND_OPT_ADVINTERVAL 7
#define ND_OPT_HOMEAGENT_INFO 8
#define ND_OPT_ROUTE_INFO 24 /* RFC4191 */
#define ND_OPT_RDNSS 25
#define ND_OPT_DNSSL 31
struct nd_opt_prefix_info { /* prefix information */
nd_uint8_t nd_opt_pi_type;
nd_uint8_t nd_opt_pi_len;
nd_uint8_t nd_opt_pi_prefix_len;
nd_uint8_t nd_opt_pi_flags_reserved;
nd_uint32_t nd_opt_pi_valid_time;
nd_uint32_t nd_opt_pi_preferred_time;
nd_uint32_t nd_opt_pi_reserved2;
nd_ipv6 nd_opt_pi_prefix;
};
#define ND_OPT_PI_FLAG_ONLINK 0x80
#define ND_OPT_PI_FLAG_AUTO 0x40
#define ND_OPT_PI_FLAG_ROUTER 0x20 /*2292bis*/
struct nd_opt_rd_hdr { /* redirected header */
nd_uint8_t nd_opt_rh_type;
nd_uint8_t nd_opt_rh_len;
nd_uint16_t nd_opt_rh_reserved1;
nd_uint32_t nd_opt_rh_reserved2;
/* followed by IP header and data */
};
struct nd_opt_mtu { /* MTU option */
nd_uint8_t nd_opt_mtu_type;
nd_uint8_t nd_opt_mtu_len;
nd_uint16_t nd_opt_mtu_reserved;
nd_uint32_t nd_opt_mtu_mtu;
};
struct nd_opt_rdnss { /* RDNSS RFC 6106 5.1 */
nd_uint8_t nd_opt_rdnss_type;
nd_uint8_t nd_opt_rdnss_len;
nd_uint16_t nd_opt_rdnss_reserved;
nd_uint32_t nd_opt_rdnss_lifetime;
nd_ipv6 nd_opt_rdnss_addr[1]; /* variable-length */
};
struct nd_opt_dnssl { /* DNSSL RFC 6106 5.2 */
nd_uint8_t nd_opt_dnssl_type;
nd_uint8_t nd_opt_dnssl_len;
nd_uint16_t nd_opt_dnssl_reserved;
nd_uint32_t nd_opt_dnssl_lifetime;
/* followed by list of DNS search domains, variable-length */
};
struct nd_opt_advinterval { /* Advertisement interval option */
nd_uint8_t nd_opt_adv_type;
nd_uint8_t nd_opt_adv_len;
nd_uint16_t nd_opt_adv_reserved;
nd_uint32_t nd_opt_adv_interval;
};
struct nd_opt_homeagent_info { /* Home Agent info */
nd_uint8_t nd_opt_hai_type;
nd_uint8_t nd_opt_hai_len;
nd_uint16_t nd_opt_hai_reserved;
nd_uint16_t nd_opt_hai_preference;
nd_uint16_t nd_opt_hai_lifetime;
};
struct nd_opt_route_info { /* route info */
nd_uint8_t nd_opt_rti_type;
nd_uint8_t nd_opt_rti_len;
nd_uint8_t nd_opt_rti_prefixlen;
nd_uint8_t nd_opt_rti_flags;
nd_uint32_t nd_opt_rti_lifetime;
/* prefix follows */
};
/*
* icmp6 namelookup
*/
struct icmp6_namelookup {
struct icmp6_hdr icmp6_nl_hdr;
nd_byte icmp6_nl_nonce[8];
nd_int32_t icmp6_nl_ttl;
#if 0
nd_uint8_t icmp6_nl_len;
nd_byte icmp6_nl_name[3];
#endif
/* could be followed by options */
};
/*
* icmp6 node information
*/
struct icmp6_nodeinfo {
struct icmp6_hdr icmp6_ni_hdr;
nd_byte icmp6_ni_nonce[8];
/* could be followed by reply data */
};
#define ni_type icmp6_ni_hdr.icmp6_type
#define ni_code icmp6_ni_hdr.icmp6_code
#define ni_cksum icmp6_ni_hdr.icmp6_cksum
#define ni_qtype icmp6_ni_hdr.icmp6_data16[0]
#define ni_flags icmp6_ni_hdr.icmp6_data16[1]
#define NI_QTYPE_NOOP 0 /* NOOP */
#define NI_QTYPE_SUPTYPES 1 /* Supported Qtypes (drafts up to 09) */
#define NI_QTYPE_FQDN 2 /* FQDN (draft 04) */
#define NI_QTYPE_DNSNAME 2 /* DNS Name */
#define NI_QTYPE_NODEADDR 3 /* Node Addresses */
#define NI_QTYPE_IPV4ADDR 4 /* IPv4 Addresses */
/* network endian */
#define NI_SUPTYPE_FLAG_COMPRESS ((uint16_t)htons(0x1))
#define NI_FQDN_FLAG_VALIDTTL ((uint16_t)htons(0x1))
/* network endian */
#define NI_NODEADDR_FLAG_TRUNCATE ((uint16_t)htons(0x1))
#define NI_NODEADDR_FLAG_ALL ((uint16_t)htons(0x2))
#define NI_NODEADDR_FLAG_COMPAT ((uint16_t)htons(0x4))
#define NI_NODEADDR_FLAG_LINKLOCAL ((uint16_t)htons(0x8))
#define NI_NODEADDR_FLAG_SITELOCAL ((uint16_t)htons(0x10))
#define NI_NODEADDR_FLAG_GLOBAL ((uint16_t)htons(0x20))
#define NI_NODEADDR_FLAG_ANYCAST ((uint16_t)htons(0x40)) /* just experimental. not in spec */
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;
ND_TCHECK_1(opt->rpl_dio_type);
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);
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_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);
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>";
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]");
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_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]");
return;
}
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");