| /* |
| * 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 { |
| uint8_t icmp6_type; /* type field */ |
| uint8_t icmp6_code; /* code field */ |
| uint16_t icmp6_cksum; /* checksum field */ |
| union { |
| uint32_t icmp6_un_data32[1]; /* type-specific field */ |
| uint16_t icmp6_un_data16[2]; /* type-specific field */ |
| uint8_t icmp6_un_data8[4]; /* 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_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 */ |
| #define ICMP6_NI_REPLY 140 /* node information reply */ |
| #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_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; |
| struct in6_addr 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; |
| uint32_t nd_ra_reachable; /* reachable time */ |
| 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 |
| |
| /* |
| * 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; |
| struct in6_addr 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; |
| struct in6_addr 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; |
| struct in6_addr nd_rd_target; /* target address */ |
| struct in6_addr 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 */ |
| uint8_t nd_opt_type; |
| 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; |
| struct in6_addr 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 */ |
| uint8_t nd_opt_rh_type; |
| uint8_t nd_opt_rh_len; |
| uint16_t nd_opt_rh_reserved1; |
| uint32_t nd_opt_rh_reserved2; |
| /* followed by IP header and data */ |
| }; |
| |
| struct nd_opt_mtu { /* MTU option */ |
| uint8_t nd_opt_mtu_type; |
| uint8_t nd_opt_mtu_len; |
| uint16_t nd_opt_mtu_reserved; |
| uint32_t nd_opt_mtu_mtu; |
| }; |
| |
| struct nd_opt_rdnss { /* RDNSS RFC 6106 5.1 */ |
| uint8_t nd_opt_rdnss_type; |
| uint8_t nd_opt_rdnss_len; |
| uint16_t nd_opt_rdnss_reserved; |
| uint32_t nd_opt_rdnss_lifetime; |
| struct in6_addr nd_opt_rdnss_addr[1]; /* variable-length */ |
| }; |
| |
| struct nd_opt_dnssl { /* DNSSL RFC 6106 5.2 */ |
| uint8_t nd_opt_dnssl_type; |
| uint8_t nd_opt_dnssl_len; |
| uint16_t nd_opt_dnssl_reserved; |
| uint32_t nd_opt_dnssl_lifetime; |
| /* followed by list of DNS search domains, variable-length */ |
| }; |
| |
| struct nd_opt_advinterval { /* Advertisement interval option */ |
| uint8_t nd_opt_adv_type; |
| uint8_t nd_opt_adv_len; |
| uint16_t nd_opt_adv_reserved; |
| uint32_t nd_opt_adv_interval; |
| }; |
| |
| struct nd_opt_homeagent_info { /* Home Agent info */ |
| uint8_t nd_opt_hai_type; |
| uint8_t nd_opt_hai_len; |
| uint16_t nd_opt_hai_reserved; |
| int16_t nd_opt_hai_preference; |
| uint16_t nd_opt_hai_lifetime; |
| }; |
| |
| struct nd_opt_route_info { /* route info */ |
| uint8_t nd_opt_rti_type; |
| uint8_t nd_opt_rti_len; |
| uint8_t nd_opt_rti_prefixlen; |
| uint8_t nd_opt_rti_flags; |
| uint32_t nd_opt_rti_lifetime; |
| /* prefix follows */ |
| }; |
| |
| /* |
| * icmp6 namelookup |
| */ |
| |
| struct icmp6_namelookup { |
| struct icmp6_hdr icmp6_nl_hdr; |
| uint8_t icmp6_nl_nonce[8]; |
| int32_t icmp6_nl_ttl; |
| #if 0 |
| uint8_t icmp6_nl_len; |
| uint8_t icmp6_nl_name[3]; |
| #endif |
| /* could be followed by options */ |
| }; |
| |
| /* |
| * icmp6 node information |
| */ |
| struct icmp6_nodeinfo { |
| struct icmp6_hdr icmp6_ni_hdr; |
| uint8_t 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 */ |
| #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 { |
| uint32_t ni_fqdn_ttl; /* TTL */ |
| uint8_t ni_fqdn_namelen; /* length in octets of the FQDN */ |
| uint8_t 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; |
| uint8_t rr_segnum; |
| uint8_t rr_flags; |
| uint16_t rr_maxdelay; |
| 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; |
| } |
| return; |
| trunc: |
| ND_PRINT((ndo," [|truncated]")); |
| 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," [|truncated]")); |
| 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," [|truncated]")); |
| 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," [|dao-truncated]")); |
| 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," [|truncated]")); |
| 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 %us, retrans time %us", |
| (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, "[|icmp6]")); |
| } |
| |
| 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, "[ndp opt]")); |
| 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,"[|icmp6]")); |
| 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,"[|icmp6]")); |
| 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, "[|icmp6]")); |
| } |
| |
| 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,"[|icmp6]")); |
| } |
| |
| /* |
| * Local Variables: |
| * c-style: whitesmith |
| * c-basic-offset: 8 |
| * End: |
| */ |