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| -rw-r--r-- | print-icmp6.c | 2082 |
1 files changed, 2082 insertions, 0 deletions
diff --git a/print-icmp6.c b/print-icmp6.c new file mode 100644 index 0000000..4738e77 --- /dev/null +++ b/print-icmp6.c @@ -0,0 +1,2082 @@ +/* + * 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 */ + +#define NI_NODEADDR_FLAG_TRUNCATE 0x0001 +#define NI_NODEADDR_FLAG_ALL 0x0002 +#define NI_NODEADDR_FLAG_COMPAT 0x0004 +#define NI_NODEADDR_FLAG_LINKLOCAL 0x0008 +#define NI_NODEADDR_FLAG_SITELOCAL 0x0010 +#define NI_NODEADDR_FLAG_GLOBAL 0x0020 +#define NI_NODEADDR_FLAG_ANYCAST 0x0040 /* 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 *); + +/* + * DIO: Updated to RFC6550, as published in 2012: section 6. (page 30) + */ + +#define ND_RPL_MESSAGE 155 /* 0x9B */ + +enum ND_RPL_CODE { + ND_RPL_DAG_IS=0x00, + ND_RPL_DAG_IO=0x01, + ND_RPL_DAO =0x02, + ND_RPL_DAO_ACK=0x03, + ND_RPL_SEC_DAG_IS = 0x80, + ND_RPL_SEC_DAG_IO = 0x81, + ND_RPL_SEC_DAG = 0x82, + ND_RPL_SEC_DAG_ACK= 0x83, + ND_RPL_SEC_CONSIST= 0x8A +}; + +enum ND_RPL_DIO_FLAGS { + ND_RPL_DIO_GROUNDED = 0x80, + ND_RPL_DIO_DATRIG = 0x40, + ND_RPL_DIO_DASUPPORT= 0x20, + ND_RPL_DIO_RES4 = 0x10, + ND_RPL_DIO_RES3 = 0x08, + ND_RPL_DIO_PRF_MASK = 0x07 /* 3-bit preference */ +}; + +#define DAGID_LEN 16 + +/* section 6 of draft-ietf-roll-rpl-19 */ +struct nd_rpl_security { + nd_uint8_t rpl_sec_t_reserved; /* bit 7 is T-bit */ + nd_uint8_t rpl_sec_algo; + nd_uint16_t rpl_sec_kim_lvl_flags; /* bit 15/14, KIM */ + /* bit 10-8, LVL, bit 7-0 flags */ + nd_uint32_t rpl_sec_counter; +#if 0 + nd_byte rpl_sec_ki[0]; /* depends upon kim */ +#endif +}; + +/* section 6.2.1, DODAG Information Solication (DIS_IS) */ +struct nd_rpl_dis_is { + nd_uint8_t rpl_dis_flags; + nd_uint8_t rpl_dis_reserved; +#if 0 + nd_byte rpl_dis_options[0]; +#endif +}; + +/* section 6.3.1, DODAG Information Object (DIO) */ +struct nd_rpl_dio { + nd_uint8_t rpl_instanceid; + nd_uint8_t rpl_version; + nd_uint16_t rpl_dagrank; + nd_uint8_t rpl_mopprf; /* bit 7=G, 5-3=MOP, 2-0=PRF */ + nd_uint8_t rpl_dtsn; /* Dest. Advertisement Trigger Sequence Number */ + nd_uint8_t rpl_flags; /* no flags defined yet */ + nd_uint8_t rpl_resv1; + nd_byte rpl_dagid[DAGID_LEN]; +}; +#define RPL_DIO_GROUND_FLAG 0x80 +#define RPL_DIO_MOP_SHIFT 3 +#define RPL_DIO_MOP_MASK (7 << RPL_DIO_MOP_SHIFT) +#define RPL_DIO_PRF_SHIFT 0 +#define RPL_DIO_PRF_MASK (7 << RPL_DIO_PRF_SHIFT) +#define RPL_DIO_GROUNDED(X) ((X)&RPL_DIO_GROUND_FLAG) +#define RPL_DIO_MOP(X) (enum RPL_DIO_MOP)(((X)&RPL_DIO_MOP_MASK) >> RPL_DIO_MOP_SHIFT) +#define RPL_DIO_PRF(X) (((X)&RPL_DIO_PRF_MASK) >> RPL_DIO_PRF_SHIFT) + +enum RPL_DIO_MOP { + RPL_DIO_NONSTORING= 0x0, + RPL_DIO_STORING = 0x1, + RPL_DIO_NONSTORING_MULTICAST = 0x2, + RPL_DIO_STORING_MULTICAST = 0x3 +}; + +enum RPL_SUBOPT { + RPL_OPT_PAD1 = 0, + RPL_OPT_PADN = 1, + RPL_DIO_METRICS = 2, + RPL_DIO_ROUTINGINFO = 3, + RPL_DIO_CONFIG = 4, + RPL_DAO_RPLTARGET = 5, + RPL_DAO_TRANSITINFO = 6, + RPL_DIO_DESTPREFIX = 8, + RPL_DAO_RPLTARGET_DESC=9 +}; + +struct rpl_genoption { + nd_uint8_t rpl_dio_type; + nd_uint8_t rpl_dio_len; /* suboption length, not including type/len */ +}; +#define RPL_GENOPTION_LEN 2 + +#define RPL_DIO_LIFETIME_INFINITE 0xffffffff +#define RPL_DIO_LIFETIME_DISCONNECT 0 + +struct rpl_dio_destprefix { + nd_uint8_t rpl_dio_type; + nd_uint8_t rpl_dio_len; + nd_uint8_t rpl_dio_prefixlen; /* in bits */ + nd_uint8_t rpl_dio_prf; /* flags, including Route Preference */ + nd_uint32_t rpl_dio_prefixlifetime; /* in seconds */ +#if 0 + nd_byte rpl_dio_prefix[0]; /* variable number of bytes */ +#endif +}; + +/* section 6.4.1, DODAG Information Object (DIO) */ +struct nd_rpl_dao { + nd_uint8_t rpl_instanceid; + nd_uint8_t rpl_flags; /* bit 7=K, 6=D */ + nd_uint8_t rpl_resv; + nd_uint8_t rpl_daoseq; + nd_byte rpl_dagid[DAGID_LEN]; /* present when D set. */ +}; +#define ND_RPL_DAO_MIN_LEN 4 /* length without DAGID */ + +/* indicates if this DAO is to be acK'ed */ +#define RPL_DAO_K_SHIFT 7 +#define RPL_DAO_K_MASK (1 << RPL_DAO_K_SHIFT) +#define RPL_DAO_K(X) (((X)&RPL_DAO_K_MASK) >> RPL_DAO_K_SHIFT) + +/* indicates if the DAGID is present */ +#define RPL_DAO_D_SHIFT 6 +#define RPL_DAO_D_MASK (1 << RPL_DAO_D_SHIFT) +#define RPL_DAO_D(X) (((X)&RPL_DAO_D_MASK) >> RPL_DAO_D_SHIFT) + +struct rpl_dao_target { + nd_uint8_t rpl_dao_type; + nd_uint8_t rpl_dao_len; + nd_uint8_t rpl_dao_flags; /* unused */ + nd_uint8_t rpl_dao_prefixlen; /* in bits */ +#if 0 + nd_byte rpl_dao_prefix[0]; /* variable number of bytes */ +#endif +}; + +/* section 6.5.1, Destination Advertisement Object Acknowledgement (DAO-ACK) */ +struct nd_rpl_daoack { + nd_uint8_t rpl_instanceid; + nd_uint8_t rpl_flags; /* bit 7=D */ + nd_uint8_t rpl_daoseq; + nd_uint8_t rpl_status; + nd_byte rpl_dagid[DAGID_LEN]; /* present when D set. */ +}; +#define ND_RPL_DAOACK_MIN_LEN 4 /* length without DAGID */ +/* indicates if the DAGID is present */ +#define RPL_DAOACK_D_SHIFT 7 +#define RPL_DAOACK_D_MASK (1 << RPL_DAOACK_D_SHIFT) +#define RPL_DAOACK_D(X) (((X)&RPL_DAOACK_D_MASK) >> RPL_DAOACK_D_SHIFT) + +static const struct tok icmp6_type_values[] = { + { ICMP6_DST_UNREACH, "destination unreachable"}, + { ICMP6_PACKET_TOO_BIG, "packet too big"}, + { ICMP6_TIME_EXCEEDED, "time exceeded in-transit"}, + { ICMP6_PARAM_PROB, "parameter problem"}, + { ICMP6_ECHO_REQUEST, "echo request"}, + { ICMP6_ECHO_REPLY, "echo reply"}, + { MLD6_LISTENER_QUERY, "multicast listener query"}, + { MLD6_LISTENER_REPORT, "multicast listener report"}, + { MLD6_LISTENER_DONE, "multicast listener done"}, + { ND_ROUTER_SOLICIT, "router solicitation"}, + { ND_ROUTER_ADVERT, "router advertisement"}, + { ND_NEIGHBOR_SOLICIT, "neighbor solicitation"}, + { ND_NEIGHBOR_ADVERT, "neighbor advertisement"}, + { ND_REDIRECT, "redirect"}, + { ICMP6_ROUTER_RENUMBERING, "router renumbering"}, + { IND_SOLICIT, "inverse neighbor solicitation"}, + { IND_ADVERT, "inverse neighbor advertisement"}, + { MLDV2_LISTENER_REPORT, "multicast listener report v2"}, + { ICMP6_HADISCOV_REQUEST, "ha discovery request"}, + { ICMP6_HADISCOV_REPLY, "ha discovery reply"}, + { ICMP6_MOBILEPREFIX_SOLICIT, "mobile router solicitation"}, + { ICMP6_MOBILEPREFIX_ADVERT, "mobile router advertisement"}, + { ICMP6_WRUREQUEST, "who-are-you request"}, + { ICMP6_WRUREPLY, "who-are-you reply"}, + { ICMP6_NI_QUERY, "node information query"}, + { ICMP6_NI_REPLY, "node information reply"}, + { MLD6_MTRACE, "mtrace message"}, + { MLD6_MTRACE_RESP, "mtrace response"}, + { ND_RPL_MESSAGE, "RPL"}, + { 0, NULL } +}; + +static const struct tok icmp6_dst_unreach_code_values[] = { + { ICMP6_DST_UNREACH_NOROUTE, "unreachable route" }, + { ICMP6_DST_UNREACH_ADMIN, " unreachable prohibited"}, + { ICMP6_DST_UNREACH_BEYONDSCOPE, "beyond scope"}, + { ICMP6_DST_UNREACH_ADDR, "unreachable address"}, + { ICMP6_DST_UNREACH_NOPORT, "unreachable port"}, + { 0, NULL } +}; + +static const struct tok icmp6_opt_pi_flag_values[] = { + { ND_OPT_PI_FLAG_ONLINK, "onlink" }, + { ND_OPT_PI_FLAG_AUTO, "auto" }, + { ND_OPT_PI_FLAG_ROUTER, "router" }, + { 0, NULL } +}; + +static const struct tok icmp6_opt_ra_flag_values[] = { + { ND_RA_FLAG_MANAGED, "managed" }, + { ND_RA_FLAG_OTHER, "other stateful"}, + { ND_RA_FLAG_HOME_AGENT, "home agent"}, + { ND_RA_FLAG_IPV6ONLY, "ipv6 only"}, + { 0, NULL } +}; + +static const struct tok icmp6_nd_na_flag_values[] = { + { ND_NA_FLAG_ROUTER, "router" }, + { ND_NA_FLAG_SOLICITED, "solicited" }, + { ND_NA_FLAG_OVERRIDE, "override" }, + { 0, NULL } +}; + +static const struct tok icmp6_opt_values[] = { + { ND_OPT_SOURCE_LINKADDR, "source link-address"}, + { ND_OPT_TARGET_LINKADDR, "destination link-address"}, + { ND_OPT_PREFIX_INFORMATION, "prefix info"}, + { ND_OPT_REDIRECTED_HEADER, "redirected header"}, + { ND_OPT_MTU, "mtu"}, + { ND_OPT_RDNSS, "rdnss"}, + { ND_OPT_DNSSL, "dnssl"}, + { ND_OPT_ADVINTERVAL, "advertisement interval"}, + { ND_OPT_HOMEAGENT_INFO, "homeagent information"}, + { ND_OPT_ROUTE_INFO, "route info"}, + { 0, NULL } +}; + +/* mldv2 report types */ +static const struct tok mldv2report2str[] = { + { 1, "is_in" }, + { 2, "is_ex" }, + { 3, "to_in" }, + { 4, "to_ex" }, + { 5, "allow" }, + { 6, "block" }, + { 0, NULL } +}; + +static const char * +get_rtpref(u_int v) +{ + static const char *rtpref_str[] = { + "medium", /* 00 */ + "high", /* 01 */ + "rsv", /* 10 */ + "low" /* 11 */ + }; + + return rtpref_str[((v & ND_RA_FLAG_RTPREF_MASK) >> 3) & 0xff]; +} + +static const char * +get_lifetime(uint32_t v) +{ + static char buf[20]; + + if (v == (uint32_t)~0UL) + return "infinity"; + else { + snprintf(buf, sizeof(buf), "%us", v); + return buf; + } +} + +static void +print_lladdr(netdissect_options *ndo, const uint8_t *p, size_t l) +{ + const uint8_t *ep, *q; + + q = p; + ep = p + l; + while (l > 0 && q < ep) { + if (q > p) + ND_PRINT(":"); + ND_PRINT("%02x", GET_U_1(q)); + q++; + l--; + } +} + +static uint16_t icmp6_cksum(netdissect_options *ndo, const struct ip6_hdr *ip6, + const struct icmp6_hdr *icp, u_int len) +{ + return nextproto6_cksum(ndo, ip6, (const uint8_t *)(const void *)icp, len, len, + IPPROTO_ICMPV6); +} + +static const struct tok rpl_mop_values[] = { + { RPL_DIO_NONSTORING, "nonstoring"}, + { RPL_DIO_STORING, "storing"}, + { RPL_DIO_NONSTORING_MULTICAST, "nonstoring-multicast"}, + { RPL_DIO_STORING_MULTICAST, "storing-multicast"}, + { 0, NULL}, +}; + +static const struct tok rpl_subopt_values[] = { + { RPL_OPT_PAD1, "pad1"}, + { RPL_OPT_PADN, "padN"}, + { RPL_DIO_METRICS, "metrics"}, + { RPL_DIO_ROUTINGINFO, "routinginfo"}, + { RPL_DIO_CONFIG, "config"}, + { RPL_DAO_RPLTARGET, "rpltarget"}, + { RPL_DAO_TRANSITINFO, "transitinfo"}, + { RPL_DIO_DESTPREFIX, "destprefix"}, + { RPL_DAO_RPLTARGET_DESC, "rpltargetdesc"}, + { 0, NULL}, +}; + +static void +rpl_printopts(netdissect_options *ndo, const uint8_t *opts, u_int length) +{ + const struct rpl_genoption *opt; + uint8_t dio_type; + u_int optlen; + + while (length != 0) { + opt = (const struct rpl_genoption *)opts; + dio_type = GET_U_1(opt->rpl_dio_type); + if (dio_type == RPL_OPT_PAD1) { + optlen = 1; + ND_PRINT(" opt:pad1"); + } else { + if (length < RPL_GENOPTION_LEN) + goto trunc; + optlen = GET_U_1(opt->rpl_dio_len)+RPL_GENOPTION_LEN; + ND_PRINT(" opt:%s len:%u ", + tok2str(rpl_subopt_values, "subopt:%u", dio_type), + optlen); + ND_TCHECK_LEN(opt, optlen); + if (length < optlen) + goto trunc; + if (ndo->ndo_vflag > 2) { + hex_print(ndo, + " ", + opts + RPL_GENOPTION_LEN, /* content of DIO option */ + optlen - RPL_GENOPTION_LEN); + } + } + opts += optlen; + length -= optlen; + } + return; +trunc: + nd_print_trunc(ndo); +} + +static void +rpl_dio_print(netdissect_options *ndo, + const u_char *bp, u_int length) +{ + const struct nd_rpl_dio *dio = (const struct nd_rpl_dio *)bp; + + ND_LCHECK_ZU(length, sizeof(struct nd_rpl_dio)); + ND_PRINT(" [dagid:%s,seq:%u,instance:%u,rank:%u,%smop:%s,prf:%u]", + GET_IP6ADDR_STRING(dio->rpl_dagid), + 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; +invalid: + nd_print_invalid(ndo); +} + +static void +rpl_dao_print(netdissect_options *ndo, + const u_char *bp, u_int length) +{ + const struct nd_rpl_dao *dao = (const struct nd_rpl_dao *)bp; + const char *dagid_str = "<elided>"; + uint8_t rpl_flags; + + ND_TCHECK_SIZE(dao); + if (length < ND_RPL_DAO_MIN_LEN) + goto tooshort; + + bp += ND_RPL_DAO_MIN_LEN; + length -= ND_RPL_DAO_MIN_LEN; + rpl_flags = GET_U_1(dao->rpl_flags); + if(RPL_DAO_D(rpl_flags)) { + ND_TCHECK_LEN(dao->rpl_dagid, DAGID_LEN); + if (length < DAGID_LEN) + goto tooshort; + dagid_str = ip6addr_string (ndo, dao->rpl_dagid); + bp += DAGID_LEN; + length -= DAGID_LEN; + } + + ND_PRINT(" [dagid:%s,seq:%u,instance:%u%s%s,flags:%02x]", + dagid_str, + GET_U_1(dao->rpl_daoseq), + GET_U_1(dao->rpl_instanceid), + RPL_DAO_K(rpl_flags) ? ",acK":"", + RPL_DAO_D(rpl_flags) ? ",Dagid":"", + rpl_flags); + + if(ndo->ndo_vflag > 1) { + rpl_printopts(ndo, bp, length); + } + return; + +trunc: + nd_print_trunc(ndo); + return; + +tooshort: + ND_PRINT(" [|length too short]"); +} + +static void +rpl_daoack_print(netdissect_options *ndo, + const u_char *bp, u_int length) +{ + const struct nd_rpl_daoack *daoack = (const struct nd_rpl_daoack *)bp; + const char *dagid_str = "<elided>"; + + ND_TCHECK_LEN(daoack, ND_RPL_DAOACK_MIN_LEN); + if (length < ND_RPL_DAOACK_MIN_LEN) + goto tooshort; + + bp += ND_RPL_DAOACK_MIN_LEN; + length -= ND_RPL_DAOACK_MIN_LEN; + if(RPL_DAOACK_D(GET_U_1(daoack->rpl_flags))) { + ND_TCHECK_LEN(daoack->rpl_dagid, DAGID_LEN); + if (length < DAGID_LEN) + goto tooshort; + dagid_str = ip6addr_string (ndo, daoack->rpl_dagid); + bp += DAGID_LEN; + length -= DAGID_LEN; + } + + ND_PRINT(" [dagid:%s,seq:%u,instance:%u,status:%u]", + dagid_str, + GET_U_1(daoack->rpl_daoseq), + GET_U_1(daoack->rpl_instanceid), + GET_U_1(daoack->rpl_status)); + + /* no officially defined options for DAOACK, but print any we find */ + if(ndo->ndo_vflag > 1) { + rpl_printopts(ndo, bp, length); + } + return; + +trunc: + nd_print_trunc(ndo); + return; + +tooshort: + ND_PRINT(" [|dao-length too short]"); +} + +static void +rpl_print(netdissect_options *ndo, + uint8_t icmp6_code, + const u_char *bp, u_int length) +{ + int secured = icmp6_code & 0x80; + int basecode= icmp6_code & 0x7f; + + if(secured) { + ND_PRINT(", (SEC) [worktodo]"); + /* XXX + * the next header pointer needs to move forward to + * skip the secure part. + */ + return; + } else { + ND_PRINT(", (CLR)"); + } + + switch(basecode) { + case ND_RPL_DAG_IS: + ND_PRINT("DODAG Information Solicitation"); + if(ndo->ndo_vflag) { + } + break; + case ND_RPL_DAG_IO: + ND_PRINT("DODAG Information Object"); + if(ndo->ndo_vflag) { + rpl_dio_print(ndo, bp, length); + } + break; + case ND_RPL_DAO: + ND_PRINT("Destination Advertisement Object"); + if(ndo->ndo_vflag) { + rpl_dao_print(ndo, bp, length); + } + break; + case ND_RPL_DAO_ACK: + ND_PRINT("Destination Advertisement Object Ack"); + if(ndo->ndo_vflag) { + rpl_daoack_print(ndo, bp, length); + } + break; + default: + ND_PRINT("RPL message, unknown code %u",icmp6_code); + break; + } + return; + +#if 0 +trunc: + nd_print_trunc(ndo); + return; +#endif + +} + +void +icmp6_print(netdissect_options *ndo, + const u_char *bp, u_int length, const u_char *bp2, int fragmented) +{ + const struct icmp6_hdr *dp; + uint8_t icmp6_type, icmp6_code; + const struct ip6_hdr *ip; + const struct ip6_hdr *oip; + const struct udphdr *ouh; + uint16_t dport; + const u_char *ep; + u_int prot; + + ndo->ndo_protocol = "icmp6"; + dp = (const struct icmp6_hdr *)bp; + ip = (const struct ip6_hdr *)bp2; + oip = (const struct ip6_hdr *)(dp + 1); + /* 'ep' points to the end of available data. */ + ep = ndo->ndo_snapend; + if (length == 0) { + ND_PRINT("ICMP6, length 0"); + nd_print_invalid(ndo); + return; + } + + if (ndo->ndo_vflag && !fragmented) { + uint16_t sum, udp_sum; + + if (ND_TTEST_LEN(bp, length)) { + udp_sum = GET_BE_U_2(dp->icmp6_cksum); + sum = icmp6_cksum(ndo, ip, dp, length); + if (sum != 0) + ND_PRINT("[bad icmp6 cksum 0x%04x -> 0x%04x!] ", + udp_sum, + in_cksum_shouldbe(udp_sum, sum)); + else + ND_PRINT("[icmp6 sum ok] "); + } + } + + icmp6_type = GET_U_1(dp->icmp6_type); + ND_PRINT("ICMP6, %s", tok2str(icmp6_type_values,"unknown icmp6 type (%u)",icmp6_type)); + + /* display cosmetics: print the packet length for printer that use the vflag now */ + if (ndo->ndo_vflag && (icmp6_type == ND_ROUTER_SOLICIT || + icmp6_type == ND_ROUTER_ADVERT || + icmp6_type == ND_NEIGHBOR_ADVERT || + icmp6_type == ND_NEIGHBOR_SOLICIT || + icmp6_type == ND_REDIRECT || + icmp6_type == ICMP6_HADISCOV_REPLY || + icmp6_type == ICMP6_MOBILEPREFIX_ADVERT )) + ND_PRINT(", length %u", length); + + icmp6_code = GET_U_1(dp->icmp6_code); + + switch (icmp6_type) { + case ICMP6_DST_UNREACH: + ND_PRINT(", %s", tok2str(icmp6_dst_unreach_code_values,"unknown unreach code (%u)",icmp6_code)); + switch (icmp6_code) { + + case ICMP6_DST_UNREACH_NOROUTE: /* fall through */ + case ICMP6_DST_UNREACH_ADMIN: + case ICMP6_DST_UNREACH_ADDR: + ND_PRINT(" %s",GET_IP6ADDR_STRING(oip->ip6_dst)); + break; + case ICMP6_DST_UNREACH_BEYONDSCOPE: + ND_PRINT(" %s, source address %s", + GET_IP6ADDR_STRING(oip->ip6_dst), + GET_IP6ADDR_STRING(oip->ip6_src)); + break; + case ICMP6_DST_UNREACH_NOPORT: + if ((ouh = get_upperlayer(ndo, (const u_char *)oip, &prot)) + == NULL) + goto trunc; + + dport = GET_BE_U_2(ouh->uh_dport); + switch (prot) { + case IPPROTO_TCP: + ND_PRINT(", %s tcp port %s", + GET_IP6ADDR_STRING(oip->ip6_dst), + tcpport_string(ndo, dport)); + break; + case IPPROTO_UDP: + ND_PRINT(", %s udp port %s", + GET_IP6ADDR_STRING(oip->ip6_dst), + udpport_string(ndo, dport)); + break; + default: + ND_PRINT(", %s protocol %u port %u unreachable", + GET_IP6ADDR_STRING(oip->ip6_dst), + prot, dport); + break; + } + break; + default: + if (ndo->ndo_vflag <= 1) { + print_unknown_data(ndo, bp,"\n\t",length); + return; + } + break; + } + break; + case ICMP6_PACKET_TOO_BIG: + ND_PRINT(", mtu %u", GET_BE_U_4(dp->icmp6_mtu)); + break; + case ICMP6_TIME_EXCEEDED: + switch (icmp6_code) { + case ICMP6_TIME_EXCEED_TRANSIT: + ND_PRINT(" for %s", + GET_IP6ADDR_STRING(oip->ip6_dst)); + break; + case ICMP6_TIME_EXCEED_REASSEMBLY: + ND_PRINT(" (reassembly)"); + break; + default: + ND_PRINT(", unknown code (%u)", icmp6_code); + break; + } + break; + case ICMP6_PARAM_PROB: + ND_TCHECK_16(oip->ip6_dst); + switch (icmp6_code) { + case ICMP6_PARAMPROB_HEADER: + ND_PRINT(", erroneous - octet %u", + GET_BE_U_4(dp->icmp6_pptr)); + break; + case ICMP6_PARAMPROB_NEXTHEADER: + ND_PRINT(", next header - octet %u", + GET_BE_U_4(dp->icmp6_pptr)); + break; + case ICMP6_PARAMPROB_OPTION: + ND_PRINT(", option - octet %u", + GET_BE_U_4(dp->icmp6_pptr)); + break; + case ICMP6_PARAMPROB_FRAGHDRCHAIN: + ND_PRINT(", incomplete header chain - octet %u", + GET_BE_U_4(dp->icmp6_pptr)); + break; + default: + ND_PRINT(", code-#%u", + icmp6_code); + break; + } + break; + case ICMP6_ECHO_REQUEST: + case ICMP6_ECHO_REPLY: + ND_PRINT(", id %u, seq %u", GET_BE_U_2(dp->icmp6_id), + GET_BE_U_2(dp->icmp6_seq)); + break; + case ICMP6_MEMBERSHIP_QUERY: + if (length == MLD_MINLEN) { + mld6_print(ndo, (const u_char *)dp); + } else if (length >= MLDV2_MINLEN) { + ND_PRINT(" v2"); + mldv2_query_print(ndo, (const u_char *)dp, length); + } else { + ND_PRINT(" unknown-version (len %u) ", length); + } + break; + case ICMP6_MEMBERSHIP_REPORT: + mld6_print(ndo, (const u_char *)dp); + break; + case ICMP6_MEMBERSHIP_REDUCTION: + mld6_print(ndo, (const u_char *)dp); + break; + case ND_ROUTER_SOLICIT: +#define RTSOLLEN 8 + if (ndo->ndo_vflag) { + if (icmp6_opt_print(ndo, (const u_char *)dp + RTSOLLEN, + length - RTSOLLEN) == -1) + goto trunc; + } + break; + case ND_ROUTER_ADVERT: +#define RTADVLEN 16 + if (ndo->ndo_vflag) { + const struct nd_router_advert *p; + + p = (const struct nd_router_advert *)dp; + ND_PRINT("\n\thop limit %u, Flags [%s]" + ", pref %s, router lifetime %us, reachable time %ums, retrans timer %ums", + GET_U_1(p->nd_ra_curhoplimit), + bittok2str(icmp6_opt_ra_flag_values,"none",GET_U_1(p->nd_ra_flags_reserved)), + get_rtpref(GET_U_1(p->nd_ra_flags_reserved)), + GET_BE_U_2(p->nd_ra_router_lifetime), + GET_BE_U_4(p->nd_ra_reachable), + GET_BE_U_4(p->nd_ra_retransmit)); + + if (icmp6_opt_print(ndo, (const u_char *)dp + RTADVLEN, + length - RTADVLEN) == -1) + goto trunc; + } + break; + case ND_NEIGHBOR_SOLICIT: + { + const struct nd_neighbor_solicit *p; + p = (const struct nd_neighbor_solicit *)dp; + ND_PRINT(", who has %s", GET_IP6ADDR_STRING(p->nd_ns_target)); + if (ndo->ndo_vflag) { +#define NDSOLLEN 24 + if (icmp6_opt_print(ndo, (const u_char *)dp + NDSOLLEN, + length - NDSOLLEN) == -1) + goto trunc; + } + } + break; + case ND_NEIGHBOR_ADVERT: + { + const struct nd_neighbor_advert *p; + + p = (const struct nd_neighbor_advert *)dp; + ND_PRINT(", tgt is %s", + GET_IP6ADDR_STRING(p->nd_na_target)); + if (ndo->ndo_vflag) { + ND_PRINT(", Flags [%s]", + bittok2str(icmp6_nd_na_flag_values, + "none", + GET_BE_U_4(p->nd_na_flags_reserved))); +#define NDADVLEN 24 + if (icmp6_opt_print(ndo, (const u_char *)dp + NDADVLEN, + length - NDADVLEN) == -1) + goto trunc; +#undef NDADVLEN + } + } + break; + case ND_REDIRECT: + { + const struct nd_redirect *p; + + p = (const struct nd_redirect *)dp; + ND_PRINT(", %s", GET_IP6ADDR_STRING(p->nd_rd_dst)); + ND_PRINT(" to %s", GET_IP6ADDR_STRING(p->nd_rd_target)); +#define REDIRECTLEN 40 + if (ndo->ndo_vflag) { + if (icmp6_opt_print(ndo, (const u_char *)dp + REDIRECTLEN, + length - REDIRECTLEN) == -1) + goto trunc; +#undef REDIRECTLEN + } + } + break; + case ICMP6_ROUTER_RENUMBERING: + icmp6_rrenum_print(ndo, bp, ep); + break; + case ICMP6_NI_QUERY: + case ICMP6_NI_REPLY: + icmp6_nodeinfo_print(ndo, length, bp, ep); + break; + case IND_SOLICIT: + case IND_ADVERT: + break; + case ICMP6_V2_MEMBERSHIP_REPORT: + mldv2_report_print(ndo, (const u_char *) dp, length); + break; + case ICMP6_MOBILEPREFIX_SOLICIT: /* fall through */ + case ICMP6_HADISCOV_REQUEST: + ND_PRINT(", id 0x%04x", GET_BE_U_2(dp->icmp6_data16[0])); + break; + case ICMP6_HADISCOV_REPLY: + if (ndo->ndo_vflag) { + const u_char *cp; + const u_char *p; + + ND_PRINT(", id 0x%04x", + GET_BE_U_2(dp->icmp6_data16[0])); + cp = (const u_char *)dp + length; + p = (const u_char *)(dp + 1); + while (p < cp) { + ND_PRINT(", %s", GET_IP6ADDR_STRING(p)); + p += 16; + } + } + break; + case ICMP6_MOBILEPREFIX_ADVERT: + if (ndo->ndo_vflag) { + uint16_t flags; + + ND_PRINT(", id 0x%04x", + GET_BE_U_2(dp->icmp6_data16[0])); + flags = GET_BE_U_2(dp->icmp6_data16[1]); + if (flags & 0xc000) + ND_PRINT(" "); + if (flags & 0x8000) + ND_PRINT("M"); + if (flags & 0x4000) + ND_PRINT("O"); +#define MPADVLEN 8 + if (icmp6_opt_print(ndo, (const u_char *)dp + MPADVLEN, + length - MPADVLEN) == -1) + goto trunc; + } + break; + case ND_RPL_MESSAGE: + /* plus 4, because struct icmp6_hdr contains 4 bytes of icmp payload */ + rpl_print(ndo, icmp6_code, dp->icmp6_data, length-sizeof(struct icmp6_hdr)+4); + break; + default: + ND_PRINT(", length %u", length); + if (ndo->ndo_vflag <= 1) + print_unknown_data(ndo, bp,"\n\t", length); + return; + } + if (!ndo->ndo_vflag) + ND_PRINT(", length %u", length); + return; +trunc: + nd_print_trunc(ndo); +} + +static const struct udphdr * +get_upperlayer(netdissect_options *ndo, const u_char *bp, u_int *prot) +{ + const u_char *ep; + const struct ip6_hdr *ip6 = (const struct ip6_hdr *)bp; + const struct udphdr *uh; + const struct ip6_hbh *hbh; + const struct ip6_frag *fragh; + const struct ah *ah; + u_int nh; + int hlen; + + /* 'ep' points to the end of available data. */ + ep = ndo->ndo_snapend; + + if (!ND_TTEST_1(ip6->ip6_nxt)) + return NULL; + + nh = GET_U_1(ip6->ip6_nxt); + hlen = sizeof(struct ip6_hdr); + + while (bp < ep) { + bp += hlen; + + switch(nh) { + case IPPROTO_UDP: + case IPPROTO_TCP: + uh = (const struct udphdr *)bp; + if (ND_TTEST_2(uh->uh_dport)) { + *prot = nh; + return(uh); + } + else + return(NULL); + /* NOTREACHED */ + + case IPPROTO_HOPOPTS: + case IPPROTO_DSTOPTS: + case IPPROTO_ROUTING: + hbh = (const struct ip6_hbh *)bp; + if (!ND_TTEST_1(hbh->ip6h_len)) + return(NULL); + nh = GET_U_1(hbh->ip6h_nxt); + hlen = (GET_U_1(hbh->ip6h_len) + 1) << 3; + break; + + case IPPROTO_FRAGMENT: /* this should be odd, but try anyway */ + fragh = (const struct ip6_frag *)bp; + if (!ND_TTEST_2(fragh->ip6f_offlg)) + return(NULL); + /* fragments with non-zero offset are meaningless */ + if ((GET_BE_U_2(fragh->ip6f_offlg) & IP6F_OFF_MASK) != 0) + return(NULL); + nh = GET_U_1(fragh->ip6f_nxt); + hlen = sizeof(struct ip6_frag); + break; + + case IPPROTO_AH: + ah = (const struct ah *)bp; + if (!ND_TTEST_1(ah->ah_len)) + return(NULL); + nh = GET_U_1(ah->ah_nxt); + hlen = (GET_U_1(ah->ah_len) + 2) << 2; + break; + + default: /* unknown or undecodable header */ + *prot = nh; /* meaningless, but set here anyway */ + return(NULL); + } + } + + return(NULL); /* should be notreached, though */ +} + +static int +icmp6_opt_print(netdissect_options *ndo, const u_char *bp, int resid) +{ + const struct nd_opt_hdr *op; + uint8_t opt_type; + u_int opt_len; + const struct nd_opt_prefix_info *opp; + const struct nd_opt_mtu *opm; + const struct nd_opt_rdnss *oprd; + const struct nd_opt_dnssl *opds; + const struct nd_opt_advinterval *opa; + const struct nd_opt_homeagent_info *oph; + const struct nd_opt_route_info *opri; + const u_char *cp, *ep, *domp; + nd_ipv6 in6; + size_t l; + u_int i; + + cp = bp; + /* 'ep' points to the end of available data. */ + ep = ndo->ndo_snapend; + + while (cp < ep) { + op = (const struct nd_opt_hdr *)cp; + + ND_TCHECK_1(op->nd_opt_len); + if (resid <= 0) + return 0; + opt_type = GET_U_1(op->nd_opt_type); + opt_len = GET_U_1(op->nd_opt_len); + if (opt_len == 0) + goto trunc; + if (cp + (opt_len << 3) > ep) + goto trunc; + + ND_PRINT("\n\t %s option (%u), length %u (%u): ", + tok2str(icmp6_opt_values, "unknown", opt_type), + opt_type, + opt_len << 3, + opt_len); + + switch (opt_type) { + case ND_OPT_SOURCE_LINKADDR: + l = (opt_len << 3) - 2; + print_lladdr(ndo, cp + 2, l); + break; + case ND_OPT_TARGET_LINKADDR: + l = (opt_len << 3) - 2; + print_lladdr(ndo, cp + 2, l); + break; + case ND_OPT_PREFIX_INFORMATION: + opp = (const struct nd_opt_prefix_info *)op; + ND_PRINT("%s/%u%s, Flags [%s], valid time %s", + GET_IP6ADDR_STRING(opp->nd_opt_pi_prefix), + GET_U_1(opp->nd_opt_pi_prefix_len), + (opt_len != 4) ? "badlen" : "", + bittok2str(icmp6_opt_pi_flag_values, "none", GET_U_1(opp->nd_opt_pi_flags_reserved)), + get_lifetime(GET_BE_U_4(opp->nd_opt_pi_valid_time))); + ND_PRINT(", pref. time %s", + get_lifetime(GET_BE_U_4(opp->nd_opt_pi_preferred_time))); + break; + case ND_OPT_REDIRECTED_HEADER: + print_unknown_data(ndo, bp,"\n\t ",opt_len<<3); + /* xxx */ + break; + case ND_OPT_MTU: + opm = (const struct nd_opt_mtu *)op; + ND_PRINT(" %u%s", + GET_BE_U_4(opm->nd_opt_mtu_mtu), + (opt_len != 1) ? "bad option length" : "" ); + break; + case ND_OPT_RDNSS: + oprd = (const struct nd_opt_rdnss *)op; + l = (opt_len - 1) / 2; + ND_PRINT(" lifetime %us,", + GET_BE_U_4(oprd->nd_opt_rdnss_lifetime)); + for (i = 0; i < l; i++) { + ND_PRINT(" addr: %s", + GET_IP6ADDR_STRING(oprd->nd_opt_rdnss_addr[i])); + } + break; + case ND_OPT_DNSSL: + opds = (const struct nd_opt_dnssl *)op; + ND_PRINT(" lifetime %us, domain(s):", + GET_BE_U_4(opds->nd_opt_dnssl_lifetime)); + domp = cp + 8; /* domain names, variable-sized, RFC1035-encoded */ + while (domp < cp + (opt_len << 3) && GET_U_1(domp) != '\0') + { + ND_PRINT(" "); + if ((domp = fqdn_print(ndo, domp, bp)) == NULL) + goto trunc; + } + break; + case ND_OPT_ADVINTERVAL: + opa = (const struct nd_opt_advinterval *)op; + ND_PRINT(" %ums", + GET_BE_U_4(opa->nd_opt_adv_interval)); + break; + case ND_OPT_HOMEAGENT_INFO: + oph = (const struct nd_opt_homeagent_info *)op; + ND_PRINT(" preference %u, lifetime %u", + GET_BE_U_2(oph->nd_opt_hai_preference), + GET_BE_U_2(oph->nd_opt_hai_lifetime)); + break; + case ND_OPT_ROUTE_INFO: + opri = (const struct nd_opt_route_info *)op; + ND_TCHECK_4(opri->nd_opt_rti_lifetime); + memset(&in6, 0, sizeof(in6)); + switch (opt_len) { + case 1: + break; + case 2: + GET_CPY_BYTES(&in6, opri + 1, 8); + break; + case 3: + GET_CPY_BYTES(&in6, opri + 1, 16); + break; + default: + goto trunc; + } + ND_PRINT(" %s/%u", ip6addr_string(ndo, (const u_char *)&in6), /* local buffer, not packet data; don't use GET_IP6ADDR_STRING() */ + GET_U_1(opri->nd_opt_rti_prefixlen)); + ND_PRINT(", pref=%s", + get_rtpref(GET_U_1(opri->nd_opt_rti_flags))); + ND_PRINT(", lifetime=%s", + get_lifetime(GET_BE_U_4(opri->nd_opt_rti_lifetime))); + break; + default: + if (ndo->ndo_vflag <= 1) { + print_unknown_data(ndo,cp+2,"\n\t ", (opt_len << 3) - 2); /* skip option header */ + return 0; + } + break; + } + /* do we want to see an additional hexdump ? */ + if (ndo->ndo_vflag> 1) + print_unknown_data(ndo, cp+2,"\n\t ", (opt_len << 3) - 2); /* skip option header */ + + cp += opt_len << 3; + resid -= opt_len << 3; + } + return 0; + +trunc: + return -1; +} + +static void +mld6_print(netdissect_options *ndo, const u_char *bp) +{ + const struct mld6_hdr *mp = (const struct mld6_hdr *)bp; + const u_char *ep; + + /* 'ep' points to the end of available data. */ + ep = ndo->ndo_snapend; + + if ((const u_char *)mp + sizeof(*mp) > ep) + return; + + ND_PRINT("max resp delay: %u ", GET_BE_U_2(mp->mld6_maxdelay)); + ND_PRINT("addr: %s", GET_IP6ADDR_STRING(mp->mld6_addr)); +} + +static void +mldv2_report_print(netdissect_options *ndo, const u_char *bp, u_int len) +{ + const struct icmp6_hdr *icp = (const struct icmp6_hdr *) bp; + u_int group, nsrcs, ngroups; + u_int i, j; + + /* Minimum len is 8 */ + if (len < 8) { + ND_PRINT(" [invalid len %u]", len); + return; + } + + ngroups = GET_BE_U_2(icp->icmp6_data16[1]); + ND_PRINT(", %u group record(s)", ngroups); + if (ndo->ndo_vflag > 0) { + /* Print the group records */ + group = 8; + for (i = 0; i < ngroups; i++) { + /* type(1) + auxlen(1) + numsrc(2) + grp(16) */ + if (len < group + 20) { + ND_PRINT(" [invalid number of groups]"); + return; + } + ND_PRINT(" [gaddr %s", GET_IP6ADDR_STRING(bp + group + 4)); + ND_PRINT(" %s", tok2str(mldv2report2str, " [v2-report-#%u]", + GET_U_1(bp + group))); + nsrcs = GET_BE_U_2(bp + group + 2); + /* Check the number of sources and print them */ + if (len < group + 20 + (nsrcs * sizeof(nd_ipv6))) { + ND_PRINT(" [invalid number of sources %u]", nsrcs); + return; + } + if (ndo->ndo_vflag == 1) + ND_PRINT(", %u source(s)", nsrcs); + else { + /* Print the sources */ + ND_PRINT(" {"); + for (j = 0; j < nsrcs; j++) { + ND_PRINT(" %s", GET_IP6ADDR_STRING(bp + group + 20 + (j * sizeof(nd_ipv6)))); + } + ND_PRINT(" }"); + } + /* Next group record */ + group += 20 + nsrcs * sizeof(nd_ipv6); + ND_PRINT("]"); + } + } +} + +static void +mldv2_query_print(netdissect_options *ndo, const u_char *bp, u_int len) +{ + const struct icmp6_hdr *icp = (const struct icmp6_hdr *) bp; + u_int mrc; + u_int mrt, qqi; + u_int nsrcs; + u_int i; + + /* Minimum len is 28 */ + if (len < 28) { + ND_PRINT(" [invalid len %u]", len); + return; + } + mrc = GET_BE_U_2(icp->icmp6_data16[0]); + if (mrc < 32768) { + mrt = mrc; + } else { + mrt = ((mrc & 0x0fff) | 0x1000) << (((mrc & 0x7000) >> 12) + 3); + } + if (ndo->ndo_vflag) { + ND_PRINT(" [max resp delay=%u]", mrt); + } + ND_PRINT(" [gaddr %s", GET_IP6ADDR_STRING(bp + 8)); + + if (ndo->ndo_vflag) { + if (GET_U_1(bp + 24) & 0x08) { + ND_PRINT(" sflag"); + } + if (GET_U_1(bp + 24) & 0x07) { + ND_PRINT(" robustness=%u", GET_U_1(bp + 24) & 0x07); + } + if (GET_U_1(bp + 25) < 128) { + qqi = GET_U_1(bp + 25); + } else { + qqi = ((GET_U_1(bp + 25) & 0x0f) | 0x10) << + (((GET_U_1(bp + 25) & 0x70) >> 4) + 3); + } + ND_PRINT(" qqi=%u", qqi); + } + + nsrcs = GET_BE_U_2(bp + 26); + if (nsrcs > 0) { + if (len < 28 + nsrcs * sizeof(nd_ipv6)) + ND_PRINT(" [invalid number of sources]"); + else if (ndo->ndo_vflag > 1) { + ND_PRINT(" {"); + for (i = 0; i < nsrcs; i++) { + ND_PRINT(" %s", GET_IP6ADDR_STRING(bp + 28 + (i * sizeof(nd_ipv6)))); + } + ND_PRINT(" }"); + } else + ND_PRINT(", %u source(s)", nsrcs); + } + ND_PRINT("]"); +} + +static void +dnsname_print(netdissect_options *ndo, const u_char *cp, const u_char *ep) +{ + int i; + + /* DNS name decoding - no decompression */ + ND_PRINT(", \""); + while (cp < ep) { + i = GET_U_1(cp); + cp++; + if (i) { + if (i > ep - cp) { + ND_PRINT("???"); + break; + } + while (i-- && cp < ep) { + fn_print_char(ndo, GET_U_1(cp)); + cp++; + } + if (cp + 1 < ep && GET_U_1(cp)) + ND_PRINT("."); + } else { + if (cp == ep) { + /* FQDN */ + ND_PRINT("."); + } else if (cp + 1 == ep && GET_U_1(cp) == '\0') { + /* truncated */ + } else { + /* invalid */ + ND_PRINT("???"); + } + break; + } + } + ND_PRINT("\""); +} + +static void +icmp6_nodeinfo_print(netdissect_options *ndo, u_int icmp6len, const u_char *bp, const u_char *ep) +{ + const struct icmp6_nodeinfo *ni6; + const struct icmp6_hdr *dp; + const u_char *cp; + size_t siz, i; + int needcomma; + + if (ep < bp) + return; + dp = (const struct icmp6_hdr *)bp; + ni6 = (const struct icmp6_nodeinfo *)bp; + siz = ep - bp; + + switch (GET_U_1(ni6->ni_type)) { + case ICMP6_NI_QUERY: + if (siz == sizeof(*dp) + 4) { + /* KAME who-are-you */ + ND_PRINT(" who-are-you request"); + break; + } + ND_PRINT(" node information query"); + + ND_TCHECK_LEN(dp, sizeof(*ni6)); + ni6 = (const struct icmp6_nodeinfo *)dp; + ND_PRINT(" ("); /*)*/ + switch (GET_BE_U_2(ni6->ni_qtype)) { + case NI_QTYPE_NOOP: + ND_PRINT("noop"); + break; + case NI_QTYPE_SUPTYPES: + ND_PRINT("supported qtypes"); + i = GET_BE_U_2(ni6->ni_flags); + if (i) + ND_PRINT(" [%s]", (i & 0x01) ? "C" : ""); + break; + case NI_QTYPE_FQDN: + ND_PRINT("DNS name"); + break; + case NI_QTYPE_NODEADDR: + ND_PRINT("node addresses"); + i = GET_BE_U_2(ni6->ni_flags); + if (!i) + break; + /* NI_NODEADDR_FLAG_TRUNCATE undefined for query */ + ND_PRINT(" [%s%s%s%s%s%s]", + (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "", + (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "", + (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "", + (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "", + (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "", + (i & NI_NODEADDR_FLAG_ALL) ? "A" : ""); + break; + default: + ND_PRINT("unknown"); + break; + } + + if (GET_BE_U_2(ni6->ni_qtype) == NI_QTYPE_NOOP || + GET_BE_U_2(ni6->ni_qtype) == NI_QTYPE_SUPTYPES) { + if (siz != sizeof(*ni6)) + if (ndo->ndo_vflag) + ND_PRINT(", invalid len"); + /*(*/ + ND_PRINT(")"); + break; + } + + /* XXX backward compat, icmp-name-lookup-03 */ + if (siz == sizeof(*ni6)) { + ND_PRINT(", 03 draft"); + /*(*/ + ND_PRINT(")"); + break; + } + + cp = (const u_char *)(ni6 + 1); + switch (GET_U_1(ni6->ni_code)) { + case ICMP6_NI_SUBJ_IPV6: + if (!ND_TTEST_LEN(dp, sizeof(*ni6) + sizeof(nd_ipv6))) + break; + if (siz != sizeof(*ni6) + sizeof(nd_ipv6)) { + if (ndo->ndo_vflag) + ND_PRINT(", invalid subject len"); + break; + } + ND_PRINT(", subject=%s", + GET_IP6ADDR_STRING(cp)); + break; + case ICMP6_NI_SUBJ_FQDN: + ND_PRINT(", subject=DNS name"); + if (GET_U_1(cp) == ep - cp - 1) { + /* icmp-name-lookup-03, pascal string */ + if (ndo->ndo_vflag) + ND_PRINT(", 03 draft"); + cp++; + ND_PRINT(", \""); + while (cp < ep) { + fn_print_char(ndo, GET_U_1(cp)); + cp++; + } + ND_PRINT("\""); + } else + dnsname_print(ndo, cp, ep); + break; + case ICMP6_NI_SUBJ_IPV4: + if (!ND_TTEST_LEN(dp, sizeof(*ni6) + sizeof(nd_ipv4))) + break; + if (siz != sizeof(*ni6) + sizeof(nd_ipv4)) { + if (ndo->ndo_vflag) + ND_PRINT(", invalid subject len"); + break; + } + ND_PRINT(", subject=%s", + GET_IPADDR_STRING(cp)); + break; + default: + ND_PRINT(", unknown subject"); + break; + } + + /*(*/ + ND_PRINT(")"); + break; + + case ICMP6_NI_REPLY: + if (icmp6len > siz) + goto trunc; + + needcomma = 0; + + ND_TCHECK_LEN(dp, sizeof(*ni6)); + ni6 = (const struct icmp6_nodeinfo *)dp; + ND_PRINT(" node information reply"); + ND_PRINT(" ("); /*)*/ + switch (GET_U_1(ni6->ni_code)) { + case ICMP6_NI_SUCCESS: + if (ndo->ndo_vflag) { + ND_PRINT("success"); + needcomma++; + } + break; + case ICMP6_NI_REFUSED: + ND_PRINT("refused"); + needcomma++; + if (siz != sizeof(*ni6)) + if (ndo->ndo_vflag) + ND_PRINT(", invalid length"); + break; + case ICMP6_NI_UNKNOWN: + ND_PRINT("unknown"); + needcomma++; + if (siz != sizeof(*ni6)) + if (ndo->ndo_vflag) + ND_PRINT(", invalid length"); + break; + } + + if (GET_U_1(ni6->ni_code) != ICMP6_NI_SUCCESS) { + /*(*/ + ND_PRINT(")"); + break; + } + + switch (GET_BE_U_2(ni6->ni_qtype)) { + case NI_QTYPE_NOOP: + if (needcomma) + ND_PRINT(", "); + ND_PRINT("noop"); + if (siz != sizeof(*ni6)) + if (ndo->ndo_vflag) + ND_PRINT(", invalid length"); + break; + case NI_QTYPE_SUPTYPES: + if (needcomma) + ND_PRINT(", "); + ND_PRINT("supported qtypes"); + i = GET_BE_U_2(ni6->ni_flags); + if (i) + ND_PRINT(" [%s]", (i & 0x01) ? "C" : ""); + break; + case NI_QTYPE_FQDN: + if (needcomma) + ND_PRINT(", "); + ND_PRINT("DNS name"); + cp = (const u_char *)(ni6 + 1) + 4; + if (GET_U_1(cp) == ep - cp - 1) { + /* icmp-name-lookup-03, pascal string */ + if (ndo->ndo_vflag) + ND_PRINT(", 03 draft"); + cp++; + ND_PRINT(", \""); + while (cp < ep) { + fn_print_char(ndo, GET_U_1(cp)); + cp++; + } + ND_PRINT("\""); + } else + dnsname_print(ndo, cp, ep); + if ((GET_BE_U_2(ni6->ni_flags) & 0x01) != 0) + ND_PRINT(" [TTL=%u]", GET_BE_U_4(ni6 + 1)); + break; + case NI_QTYPE_NODEADDR: + if (needcomma) + ND_PRINT(", "); + ND_PRINT("node addresses"); + i = sizeof(*ni6); + while (i < siz) { + if (i + sizeof(uint32_t) + sizeof(nd_ipv6) > siz) + break; + ND_PRINT(" %s(%u)", + GET_IP6ADDR_STRING(bp + i + sizeof(uint32_t)), + GET_BE_U_4(bp + i)); + i += sizeof(uint32_t) + sizeof(nd_ipv6); + } + i = GET_BE_U_2(ni6->ni_flags); + if (!i) + break; + ND_PRINT(" [%s%s%s%s%s%s%s]", + (i & NI_NODEADDR_FLAG_ANYCAST) ? "a" : "", + (i & NI_NODEADDR_FLAG_GLOBAL) ? "G" : "", + (i & NI_NODEADDR_FLAG_SITELOCAL) ? "S" : "", + (i & NI_NODEADDR_FLAG_LINKLOCAL) ? "L" : "", + (i & NI_NODEADDR_FLAG_COMPAT) ? "C" : "", + (i & NI_NODEADDR_FLAG_ALL) ? "A" : "", + (i & NI_NODEADDR_FLAG_TRUNCATE) ? "T" : ""); + break; + default: + if (needcomma) + ND_PRINT(", "); + ND_PRINT("unknown"); + break; + } + + /*(*/ + ND_PRINT(")"); + break; + } + return; + +trunc: + nd_print_trunc(ndo); +} + +static void +icmp6_rrenum_print(netdissect_options *ndo, const u_char *bp, const u_char *ep) +{ + const struct icmp6_router_renum *rr6; + const char *cp; + const struct rr_pco_match *match; + const struct rr_pco_use *use; + char hbuf[NI_MAXHOST]; + int n; + + if (ep < bp) + return; + rr6 = (const struct icmp6_router_renum *)bp; + cp = (const char *)(rr6 + 1); + + ND_TCHECK_4(rr6->rr_reserved); + switch (GET_U_1(rr6->rr_code)) { + case ICMP6_ROUTER_RENUMBERING_COMMAND: + ND_PRINT(", command"); + break; + case ICMP6_ROUTER_RENUMBERING_RESULT: + ND_PRINT(", result"); + break; + case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET: + ND_PRINT(", sequence number reset"); + break; + default: + ND_PRINT(", code-#%u", GET_U_1(rr6->rr_code)); + break; + } + + ND_PRINT(", seq=%u", GET_BE_U_4(rr6->rr_seqnum)); + + if (ndo->ndo_vflag) { + uint8_t rr_flags = GET_U_1(rr6->rr_flags); +#define F(x, y) (rr_flags & (x) ? (y) : "") + ND_PRINT("["); /*]*/ + if (rr_flags) { + ND_PRINT("%s%s%s%s%s,", F(ICMP6_RR_FLAGS_TEST, "T"), + F(ICMP6_RR_FLAGS_REQRESULT, "R"), + F(ICMP6_RR_FLAGS_FORCEAPPLY, "A"), + F(ICMP6_RR_FLAGS_SPECSITE, "S"), + F(ICMP6_RR_FLAGS_PREVDONE, "P")); + } + ND_PRINT("seg=%u,", GET_U_1(rr6->rr_segnum)); + ND_PRINT("maxdelay=%u", GET_BE_U_2(rr6->rr_maxdelay)); + if (GET_BE_U_4(rr6->rr_reserved)) + ND_PRINT("rsvd=0x%x", GET_BE_U_4(rr6->rr_reserved)); + /*[*/ + ND_PRINT("]"); +#undef F + } + + if (GET_U_1(rr6->rr_code) == ICMP6_ROUTER_RENUMBERING_COMMAND) { + match = (const struct rr_pco_match *)cp; + cp = (const char *)(match + 1); + + ND_TCHECK_16(match->rpm_prefix); + + if (ndo->ndo_vflag > 1) + ND_PRINT("\n\t"); + else + ND_PRINT(" "); + ND_PRINT("match("); /*)*/ + switch (GET_U_1(match->rpm_code)) { + case RPM_PCO_ADD: ND_PRINT("add"); break; + case RPM_PCO_CHANGE: ND_PRINT("change"); break; + case RPM_PCO_SETGLOBAL: ND_PRINT("setglobal"); break; + default: ND_PRINT("#%u", + GET_U_1(match->rpm_code)); break; + } + + if (ndo->ndo_vflag) { + ND_PRINT(",ord=%u", GET_U_1(match->rpm_ordinal)); + ND_PRINT(",min=%u", GET_U_1(match->rpm_minlen)); + ND_PRINT(",max=%u", GET_U_1(match->rpm_maxlen)); + } + if (addrtostr6(match->rpm_prefix, hbuf, sizeof(hbuf))) + ND_PRINT(",%s/%u", hbuf, GET_U_1(match->rpm_matchlen)); + else + ND_PRINT(",?/%u", GET_U_1(match->rpm_matchlen)); + /*(*/ + ND_PRINT(")"); + + n = GET_U_1(match->rpm_len) - 3; + if (n % 4) + goto trunc; + n /= 4; + while (n-- > 0) { + use = (const struct rr_pco_use *)cp; + cp = (const char *)(use + 1); + + ND_TCHECK_16(use->rpu_prefix); + + if (ndo->ndo_vflag > 1) + ND_PRINT("\n\t"); + else + ND_PRINT(" "); + ND_PRINT("use("); /*)*/ + if (GET_U_1(use->rpu_flags)) { +#define F(x, y) (GET_U_1(use->rpu_flags) & (x) ? (y) : "") + ND_PRINT("%s%s,", + F(ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME, "V"), + F(ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME, "P")); +#undef F + } + if (ndo->ndo_vflag) { + ND_PRINT("mask=0x%x,", + GET_U_1(use->rpu_ramask)); + ND_PRINT("raflags=0x%x,", + GET_U_1(use->rpu_raflags)); + if (GET_BE_U_4(use->rpu_vltime) == 0xffffffff) + ND_PRINT("vltime=infty,"); + else + ND_PRINT("vltime=%u,", + GET_BE_U_4(use->rpu_vltime)); + if (GET_BE_U_4(use->rpu_pltime) == 0xffffffff) + ND_PRINT("pltime=infty,"); + else + ND_PRINT("pltime=%u,", + GET_BE_U_4(use->rpu_pltime)); + } + if (addrtostr6(use->rpu_prefix, hbuf, sizeof(hbuf))) + ND_PRINT("%s/%u/%u", hbuf, + GET_U_1(use->rpu_uselen), + GET_U_1(use->rpu_keeplen)); + else + ND_PRINT("?/%u/%u", GET_U_1(use->rpu_uselen), + GET_U_1(use->rpu_keeplen)); + /*(*/ + ND_PRINT(")"); + } + } + + return; + +trunc: + nd_print_trunc(ndo); +} |