X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/10bdeb0c44eb4a997645ebdc15376fb36f9d3ae2..d2777156522f139a858bd6b5b51e364826bc95a7:/print-icmp6.c diff --git a/print-icmp6.c b/print-icmp6.c index 0655197c..47690f5a 100644 --- a/print-icmp6.c +++ b/print-icmp6.c @@ -19,53 +19,626 @@ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ -#ifndef lint -static const char rcsid[] _U_ = - "@(#) $Header: /tcpdump/master/tcpdump/print-icmp6.c,v 1.86 2008-02-05 19:36:13 guy Exp $"; -#endif +/* \summary: IPv6 Internet Control Message Protocol (ICMPv6) printer */ #ifdef HAVE_CONFIG_H -#include "config.h" +#include #endif -#ifdef INET6 - -#include +#include "netdissect-stdinc.h" #include #include -#include "interface.h" +#include "netdissect.h" #include "addrtoname.h" +#include "addrtostr.h" #include "extract.h" #include "ip6.h" -#include "icmp6.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(u_int32_t); -static void print_lladdr(const u_char *, size_t); -static void icmp6_opt_print(const u_char *, int); -static void mld6_print(const u_char *); -static void mldv2_report_print(const u_char *, u_int); -static void mldv2_query_print(const u_char *, u_int); -static struct udphdr *get_upperlayer(u_char *, u_int *); -static void dnsname_print(const u_char *, const u_char *); -static void icmp6_nodeinfo_print(u_int, const u_char *, const u_char *); -static void icmp6_rrenum_print(const u_char *, const u_char *); - -#ifndef abs -#define abs(a) ((0 < (a)) ? (a) : -(a)) +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 +}; -/* inline the various RPL definitions */ -#define ND_RPL_MESSAGE 0x9B +/* 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 +}; -static struct tok icmp6_type_values[] = { +/* 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"}, @@ -98,7 +671,7 @@ static struct tok icmp6_type_values[] = { { 0, NULL } }; -static struct tok icmp6_dst_unreach_code_values[] = { +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"}, @@ -107,35 +680,36 @@ static struct tok icmp6_dst_unreach_code_values[] = { { 0, NULL } }; -static struct tok icmp6_opt_pi_flag_values[] = { +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 struct tok icmp6_opt_ra_flag_values[] = { +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 struct tok icmp6_nd_na_flag_values[] = { +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 struct tok icmp6_opt_values[] = { +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"}, @@ -143,7 +717,7 @@ static struct tok icmp6_opt_values[] = { }; /* mldv2 report types */ -static struct tok mldv2report2str[] = { +static const struct tok mldv2report2str[] = { { 1, "is_in" }, { 2, "is_ex" }, { 3, "to_in" }, @@ -167,481 +741,599 @@ get_rtpref(u_int v) } static const char * -get_lifetime(u_int32_t v) +get_lifetime(uint32_t v) { static char buf[20]; - if (v == (u_int32_t)~0UL) + if (v == (uint32_t)~0UL) return "infinity"; else { - snprintf(buf, sizeof(buf), "%u", v); + snprintf(buf, sizeof(buf), "%us", v); return buf; } } static void -print_lladdr(const u_int8_t *p, size_t l) +print_lladdr(netdissect_options *ndo, const uint8_t *p, size_t l) { - const u_int8_t *ep, *q; + const uint8_t *ep, *q; q = p; ep = p + l; while (l > 0 && q < ep) { if (q > p) - printf(":"); - printf("%02x", *q++); + ND_PRINT(":"); + ND_PRINT("%02x", GET_U_1(q)); + q++; l--; } } -static int icmp6_cksum(const struct ip6_hdr *ip6, const struct icmp6_hdr *icp, - u_int len) +static uint16_t icmp6_cksum(netdissect_options *ndo, const struct ip6_hdr *ip6, + const struct icmp6_hdr *icp, u_int len) { - size_t i; - register const u_int16_t *sp; - u_int32_t sum; - union { - struct { - struct in6_addr ph_src; - struct in6_addr ph_dst; - u_int32_t ph_len; - u_int8_t ph_zero[3]; - u_int8_t ph_nxt; - } ph; - u_int16_t pa[20]; - } phu; - - /* pseudo-header */ - memset(&phu, 0, sizeof(phu)); - phu.ph.ph_src = ip6->ip6_src; - phu.ph.ph_dst = ip6->ip6_dst; - phu.ph.ph_len = htonl(len); - phu.ph.ph_nxt = IPPROTO_ICMPV6; - - sum = 0; - for (i = 0; i < sizeof(phu.pa) / sizeof(phu.pa[0]); i++) - sum += phu.pa[i]; - - sp = (const u_int16_t *)icp; - - for (i = 0; i < (len & ~1); i += 2) - sum += *sp++; - - if (len & 1) - sum += htons((*(const u_int8_t *)sp) << 8); - - while (sum > 0xffff) - sum = (sum & 0xffff) + (sum >> 16); - sum = ~sum & 0xffff; - - return (sum); + return nextproto6_cksum(ndo, ip6, (const uint8_t *)(const void *)icp, len, len, + IPPROTO_ICMPV6); } -enum ND_RPL_CODE { - ND_RPL_DIS =0x01, - ND_RPL_DIO =0x02, - ND_RPL_DAO =0x03, - ND_RPL_DAO_ACK=0x04, - ND_RPL_SDIS =0x80, - ND_RPL_SDIO =0x81, - ND_RPL_SDAO =0x82, - ND_RPL_SDAO_ACK=0x83, - ND_RPL_SCC =0x8A, +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}, }; -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 */ +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}, }; -struct nd_rpl_dio { - u_int8_t rpl_flags; - u_int8_t rpl_seq; - u_int8_t rpl_instanceid; - u_int8_t rpl_dagrank; - u_int8_t rpl_dagid[16]; -}; +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_print(netdissect_options *ndo, - const struct icmp6_hdr *hdr, - const u_char *bp, u_int length _U_) +rpl_dio_print(netdissect_options *ndo, + const u_char *bp, u_int length) { - struct nd_rpl_dio *dio = (struct nd_rpl_dio *)bp; - int secured = hdr->icmp6_code & 0x80; - int basecode= hdr->icmp6_code & 0x7f; + 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); +} - ND_TCHECK(dio->rpl_dagid); +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 = ""; + uint8_t rpl_flags; + + ND_TCHECK_SIZE(dao); + if (length < ND_RPL_DAO_MIN_LEN) + goto tooshort; + + bp += ND_RPL_DAO_MIN_LEN; + length -= ND_RPL_DAO_MIN_LEN; + rpl_flags = GET_U_1(dao->rpl_flags); + if(RPL_DAO_D(rpl_flags)) { + ND_TCHECK_LEN(dao->rpl_dagid, DAGID_LEN); + if (length < DAGID_LEN) + goto tooshort; + dagid_str = ip6addr_string (ndo, dao->rpl_dagid); + bp += DAGID_LEN; + length -= DAGID_LEN; + } + + ND_PRINT(" [dagid:%s,seq:%u,instance:%u%s%s,%02x]", + dagid_str, + GET_U_1(dao->rpl_daoseq), + GET_U_1(dao->rpl_instanceid), + RPL_DAO_K(rpl_flags) ? ",acK":"", + RPL_DAO_D(rpl_flags) ? ",Dagid":"", + rpl_flags); + + if(ndo->ndo_vflag > 1) { + rpl_printopts(ndo, bp, length); + } + return; + +trunc: + nd_print_trunc(ndo); + return; + +tooshort: + ND_PRINT(" [|length too short]"); +} + +static void +rpl_daoack_print(netdissect_options *ndo, + const u_char *bp, u_int length) +{ + const struct nd_rpl_daoack *daoack = (const struct nd_rpl_daoack *)bp; + const char *dagid_str = ""; + + 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((ndo, ", (SEC)")); + ND_PRINT(", (SEC) [worktodo]"); + /* XXX + * the next header pointer needs to move forward to + * skip the secure part. + */ + return; } else { - ND_PRINT((ndo, ", (CLR)")); + ND_PRINT(", (CLR)"); } - + switch(basecode) { - case ND_RPL_DIS: - ND_PRINT((ndo, "DODAG Information Solicitation")); + case ND_RPL_DAG_IS: + ND_PRINT("DODAG Information Solicitation"); if(ndo->ndo_vflag) { } break; - case ND_RPL_DIO: - ND_PRINT((ndo, "DODAG Information Object")); + case ND_RPL_DAG_IO: + ND_PRINT("DODAG Information Object"); if(ndo->ndo_vflag) { - char dagid[65]; - char *d = dagid; - int i; - for(i=0;i<16;i++) { - if(isprint(dio->rpl_dagid[i])) { - *d++ = dio->rpl_dagid[i]; - } else { - int cnt=snprintf(d,4,"0x%02x", - dio->rpl_dagid[i]); - d += cnt; - } - } - *d++ = '\0'; - ND_PRINT((ndo, " [seq:%u,instance:%u,rank:%u,dagid:%s]", - dio->rpl_seq, - dio->rpl_instanceid, - dio->rpl_dagrank, - dagid)); + rpl_dio_print(ndo, bp, length); } break; case ND_RPL_DAO: - ND_PRINT((ndo, "Destination Advertisement Object")); + ND_PRINT("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")); + ND_PRINT("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)); + ND_PRINT("RPL message, unknown code %u",icmp6_code); break; } return; + +#if 0 trunc: - ND_PRINT((ndo," [|truncated]")); + 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; - int dport; + uint16_t dport; const u_char *ep; u_int prot; - dp = (struct icmp6_hdr *)bp; - ip = (struct ip6_hdr *)bp2; - oip = (struct ip6_hdr *)(dp + 1); + 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 = snapend; - - TCHECK(dp->icmp6_cksum); + ep = ndo->ndo_snapend; + if (length == 0) { + ND_PRINT("ICMP6, length 0"); + nd_print_invalid(ndo); + return; + } - if (vflag && !fragmented) { - int sum = dp->icmp6_cksum; + if (ndo->ndo_vflag && !fragmented) { + uint16_t sum, udp_sum; - if (TTEST2(bp[0], length)) { - sum = icmp6_cksum(ip, dp, length); + 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) - (void)printf("[bad icmp6 cksum %x!] ", sum); + ND_PRINT("[bad icmp6 cksum 0x%04x -> 0x%04x!] ", + udp_sum, + in_cksum_shouldbe(udp_sum, sum)); else - (void)printf("[icmp6 sum ok] "); + ND_PRINT("[icmp6 sum ok] "); } } - printf("ICMP6, %s", tok2str(icmp6_type_values,"unknown icmp6 type (%u)",dp->icmp6_type)); + 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 (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 )) - printf(", length %u", length); - - switch (dp->icmp6_type) { + 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: - TCHECK(oip->ip6_dst); - printf(", %s", tok2str(icmp6_dst_unreach_code_values,"unknown unreach code (%u)",dp->icmp6_code)); - switch (dp->icmp6_code) { + 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: - printf(" %s",ip6addr_string(&oip->ip6_dst)); + ND_PRINT(" %s",GET_IP6ADDR_STRING(oip->ip6_dst)); break; case ICMP6_DST_UNREACH_BEYONDSCOPE: - printf(" %s, source address %s", - ip6addr_string(&oip->ip6_dst), - ip6addr_string(&oip->ip6_src)); + 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((u_char *)oip, &prot)) + if ((ouh = get_upperlayer(ndo, (const u_char *)oip, &prot)) == NULL) goto trunc; - dport = EXTRACT_16BITS(&ouh->uh_dport); + dport = GET_BE_U_2(ouh->uh_dport); switch (prot) { case IPPROTO_TCP: - printf(", %s tcp port %s", - ip6addr_string(&oip->ip6_dst), - tcpport_string(dport)); + ND_PRINT(", %s tcp port %s", + GET_IP6ADDR_STRING(oip->ip6_dst), + tcpport_string(ndo, dport)); break; case IPPROTO_UDP: - printf(", %s udp port %s", - ip6addr_string(&oip->ip6_dst), - udpport_string(dport)); + ND_PRINT(", %s udp port %s", + GET_IP6ADDR_STRING(oip->ip6_dst), + udpport_string(ndo, dport)); break; default: - printf(", %s protocol %d port %d unreachable", - ip6addr_string(&oip->ip6_dst), - oip->ip6_nxt, dport); + ND_PRINT(", %s protocol %u port %u unreachable", + GET_IP6ADDR_STRING(oip->ip6_dst), + prot, dport); break; } break; default: - if (vflag <= 1) { - print_unknown_data(bp,"\n\t",length); - return; - } + if (ndo->ndo_vflag <= 1) { + print_unknown_data(ndo, bp,"\n\t",length); + return; + } break; } break; case ICMP6_PACKET_TOO_BIG: - TCHECK(dp->icmp6_mtu); - printf(", mtu %u", EXTRACT_32BITS(&dp->icmp6_mtu)); + ND_PRINT(", mtu %u", GET_BE_U_4(dp->icmp6_mtu)); break; case ICMP6_TIME_EXCEEDED: - TCHECK(oip->ip6_dst); - switch (dp->icmp6_code) { + switch (icmp6_code) { case ICMP6_TIME_EXCEED_TRANSIT: - printf(" for %s", - ip6addr_string(&oip->ip6_dst)); + ND_PRINT(" for %s", + GET_IP6ADDR_STRING(oip->ip6_dst)); break; case ICMP6_TIME_EXCEED_REASSEMBLY: - printf(" (reassembly)"); + ND_PRINT(" (reassembly)"); break; default: - printf(", unknown code (%u)", dp->icmp6_code); + ND_PRINT(", unknown code (%u)", icmp6_code); break; } break; case ICMP6_PARAM_PROB: - TCHECK(oip->ip6_dst); - switch (dp->icmp6_code) { + ND_TCHECK_16(oip->ip6_dst); + switch (icmp6_code) { case ICMP6_PARAMPROB_HEADER: - printf(", errorneous - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)); - break; + ND_PRINT(", erroneous - octet %u", + GET_BE_U_4(dp->icmp6_pptr)); + break; case ICMP6_PARAMPROB_NEXTHEADER: - printf(", next header - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)); - break; + ND_PRINT(", next header - octet %u", + GET_BE_U_4(dp->icmp6_pptr)); + break; case ICMP6_PARAMPROB_OPTION: - printf(", option - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)); - break; + 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: - printf(", code-#%d", - dp->icmp6_code); - break; + ND_PRINT(", code-#%u", + icmp6_code); + break; } break; case ICMP6_ECHO_REQUEST: case ICMP6_ECHO_REPLY: - TCHECK(dp->icmp6_seq); - printf(", seq %u", EXTRACT_16BITS(&dp->icmp6_seq)); + 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((const u_char *)dp); + mld6_print(ndo, (const u_char *)dp); } else if (length >= MLDV2_MINLEN) { - printf("v2 "); - mldv2_query_print((const u_char *)dp, length); + ND_PRINT(" v2"); + mldv2_query_print(ndo, (const u_char *)dp, length); } else { - printf(" unknown-version (len %u) ", length); + ND_PRINT(" unknown-version (len %u) ", length); } break; case ICMP6_MEMBERSHIP_REPORT: - mld6_print((const u_char *)dp); + mld6_print(ndo, (const u_char *)dp); break; case ICMP6_MEMBERSHIP_REDUCTION: - mld6_print((const u_char *)dp); + mld6_print(ndo, (const u_char *)dp); break; case ND_ROUTER_SOLICIT: #define RTSOLLEN 8 - if (vflag) { - icmp6_opt_print((const u_char *)dp + RTSOLLEN, - length - RTSOLLEN); + 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 (vflag) { - struct nd_router_advert *p; - - p = (struct nd_router_advert *)dp; - TCHECK(p->nd_ra_retransmit); - printf("\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((const u_char *)dp + RTADVLEN, - length - RTADVLEN); + 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: { - struct nd_neighbor_solicit *p; - p = (struct nd_neighbor_solicit *)dp; - TCHECK(p->nd_ns_target); - printf(", who has %s", ip6addr_string(&p->nd_ns_target)); - if (vflag) { + 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 - icmp6_opt_print((const u_char *)dp + NDSOLLEN, - length - NDSOLLEN); + if (icmp6_opt_print(ndo, (const u_char *)dp + NDSOLLEN, + length - NDSOLLEN) == -1) + goto trunc; } } break; case ND_NEIGHBOR_ADVERT: { - struct nd_neighbor_advert *p; - - p = (struct nd_neighbor_advert *)dp; - TCHECK(p->nd_na_target); - printf(", tgt is %s", - ip6addr_string(&p->nd_na_target)); - if (vflag) { - printf(", Flags [%s]", - bittok2str(icmp6_nd_na_flag_values, - "none", - EXTRACT_32BITS(&p->nd_na_flags_reserved))); + 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 - icmp6_opt_print((const u_char *)dp + NDADVLEN, - length - NDADVLEN); + if (icmp6_opt_print(ndo, (const u_char *)dp + NDADVLEN, + length - NDADVLEN) == -1) + goto trunc; #undef NDADVLEN } } break; case ND_REDIRECT: -#define RDR(i) ((struct nd_redirect *)(i)) - TCHECK(RDR(dp)->nd_rd_dst); - printf(", %s", getname6((const u_char *)&RDR(dp)->nd_rd_dst)); - TCHECK(RDR(dp)->nd_rd_target); - printf(" to %s", - getname6((const u_char*)&RDR(dp)->nd_rd_target)); + { + 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 (vflag) { - icmp6_opt_print((const u_char *)dp + REDIRECTLEN, - length - REDIRECTLEN); + if (ndo->ndo_vflag) { + if (icmp6_opt_print(ndo, (const u_char *)dp + REDIRECTLEN, + length - REDIRECTLEN) == -1) + goto trunc; +#undef REDIRECTLEN } + } break; -#undef REDIRECTLEN -#undef RDR case ICMP6_ROUTER_RENUMBERING: - icmp6_rrenum_print(bp, ep); + icmp6_rrenum_print(ndo, bp, ep); break; case ICMP6_NI_QUERY: case ICMP6_NI_REPLY: - icmp6_nodeinfo_print(length, bp, ep); + icmp6_nodeinfo_print(ndo, length, bp, ep); break; case IND_SOLICIT: case IND_ADVERT: break; case ICMP6_V2_MEMBERSHIP_REPORT: - mldv2_report_print((const u_char *) dp, length); + mldv2_report_print(ndo, (const u_char *) dp, length); break; case ICMP6_MOBILEPREFIX_SOLICIT: /* fall through */ case ICMP6_HADISCOV_REQUEST: - TCHECK(dp->icmp6_data16[0]); - printf(", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0])); + ND_PRINT(", id 0x%04x", GET_BE_U_2(dp->icmp6_data16[0])); break; case ICMP6_HADISCOV_REPLY: - if (vflag) { - struct in6_addr *in6; - u_char *cp; - - TCHECK(dp->icmp6_data16[0]); - printf(", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0])); - cp = (u_char *)dp + length; - in6 = (struct in6_addr *)(dp + 1); - for (; (u_char *)in6 < cp; in6++) { - TCHECK(*in6); - printf(", %s", ip6addr_string(in6)); + 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 (vflag) { - TCHECK(dp->icmp6_data16[0]); - printf(", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0])); - if (dp->icmp6_data16[1] & 0xc0) - printf(" "); - if (dp->icmp6_data16[1] & 0x80) - printf("M"); - if (dp->icmp6_data16[1] & 0x40) - printf("O"); + 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 - icmp6_opt_print((const u_char *)dp + MPADVLEN, - length - MPADVLEN); + if (icmp6_opt_print(ndo, (const u_char *)dp + MPADVLEN, + length - MPADVLEN) == -1) + goto trunc; } break; case ND_RPL_MESSAGE: - rpl_print(ndo, dp, &dp->icmp6_data8[0], length); + /* 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: - printf(", length %u", length); - if (vflag <= 1) - print_unknown_data(bp,"\n\t", length); + ND_PRINT(", length %u", length); + if (ndo->ndo_vflag <= 1) + print_unknown_data(ndo, bp,"\n\t", length); return; } - if (!vflag) - printf(", length %u", length); + if (!ndo->ndo_vflag) + ND_PRINT(", length %u", length); return; trunc: - fputs("[|icmp6]", stdout); + nd_print_trunc(ndo); } -static struct udphdr * -get_upperlayer(u_char *bp, u_int *prot) +static const struct udphdr * +get_upperlayer(netdissect_options *ndo, const u_char *bp, u_int *prot) { const u_char *ep; - struct ip6_hdr *ip6 = (struct ip6_hdr *)bp; - struct udphdr *uh; - struct ip6_hbh *hbh; - struct ip6_frag *fragh; - struct ah *ah; + 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 = snapend; + ep = ndo->ndo_snapend; - if (!TTEST(ip6->ip6_nxt)) + if (!ND_TTEST_1(ip6->ip6_nxt)) return NULL; - nh = ip6->ip6_nxt; + nh = GET_U_1(ip6->ip6_nxt); hlen = sizeof(struct ip6_hdr); while (bp < ep) { @@ -650,8 +1342,8 @@ get_upperlayer(u_char *bp, u_int *prot) switch(nh) { case IPPROTO_UDP: case IPPROTO_TCP: - uh = (struct udphdr *)bp; - if (TTEST(uh->uh_dport)) { + uh = (const struct udphdr *)bp; + if (ND_TTEST_2(uh->uh_dport)) { *prot = nh; return(uh); } @@ -662,30 +1354,30 @@ get_upperlayer(u_char *bp, u_int *prot) case IPPROTO_HOPOPTS: case IPPROTO_DSTOPTS: case IPPROTO_ROUTING: - hbh = (struct ip6_hbh *)bp; - if (!TTEST(hbh->ip6h_len)) + hbh = (const struct ip6_hbh *)bp; + if (!ND_TTEST_1(hbh->ip6h_len)) return(NULL); - nh = hbh->ip6h_nxt; - hlen = (hbh->ip6h_len + 1) << 3; + 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 = (struct ip6_frag *)bp; - if (!TTEST(fragh->ip6f_offlg)) + fragh = (const struct ip6_frag *)bp; + if (!ND_TTEST_2(fragh->ip6f_offlg)) return(NULL); /* fragments with non-zero offset are meaningless */ - if ((EXTRACT_16BITS(&fragh->ip6f_offlg) & IP6F_OFF_MASK) != 0) + if ((GET_BE_U_2(fragh->ip6f_offlg) & IP6F_OFF_MASK) != 0) return(NULL); - nh = fragh->ip6f_nxt; + nh = GET_U_1(fragh->ip6f_nxt); hlen = sizeof(struct ip6_frag); break; case IPPROTO_AH: - ah = (struct ah *)bp; - if (!TTEST(ah->ah_len)) + ah = (const struct ah *)bp; + if (!ND_TTEST_1(ah->ah_len)) return(NULL); - nh = ah->ah_nxt; - hlen = (ah->ah_len + 2) << 2; + nh = GET_U_1(ah->ah_nxt); + hlen = (GET_U_1(ah->ah_len) + 2) << 2; break; default: /* unknown or undecodable header */ @@ -697,374 +1389,360 @@ get_upperlayer(u_char *bp, u_int *prot) return(NULL); /* should be notreached, though */ } -static void -icmp6_opt_print(const u_char *bp, int resid) +static int +icmp6_opt_print(netdissect_options *ndo, const u_char *bp, int resid) { const struct nd_opt_hdr *op; - const struct nd_opt_hdr *opl; /* why there's no struct? */ + uint8_t opt_type; + u_int opt_len; const struct nd_opt_prefix_info *opp; - const struct icmp6_opts_redirect *opr; 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; - struct in6_addr in6, *in6p; + const u_char *cp, *ep, *domp; + nd_ipv6 in6; size_t l; u_int i; -#define ECHECK(var) if ((u_char *)&(var) > ep - sizeof(var)) return - cp = bp; /* 'ep' points to the end of available data. */ - ep = snapend; + ep = ndo->ndo_snapend; while (cp < ep) { - op = (struct nd_opt_hdr *)cp; + op = (const struct nd_opt_hdr *)cp; - ECHECK(op->nd_opt_len); + ND_TCHECK_1(op->nd_opt_len); if (resid <= 0) - return; - if (op->nd_opt_len == 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 + (op->nd_opt_len << 3) > ep) + if (cp + (opt_len << 3) > ep) goto trunc; - printf("\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); + 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 (op->nd_opt_type) { + switch (opt_type) { case ND_OPT_SOURCE_LINKADDR: - opl = (struct nd_opt_hdr *)op; - l = (op->nd_opt_len << 3) - 2; - print_lladdr(cp + 2, l); + l = (opt_len << 3) - 2; + print_lladdr(ndo, cp + 2, l); break; case ND_OPT_TARGET_LINKADDR: - opl = (struct nd_opt_hdr *)op; - l = (op->nd_opt_len << 3) - 2; - print_lladdr(cp + 2, l); + l = (opt_len << 3) - 2; + print_lladdr(ndo, cp + 2, l); break; case ND_OPT_PREFIX_INFORMATION: - opp = (struct nd_opt_prefix_info *)op; - TCHECK(opp->nd_opt_pi_prefix); - printf("%s/%u%s, Flags [%s], valid time %ss", - ip6addr_string(&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))); - printf(", pref. time %ss", get_lifetime(EXTRACT_32BITS(&opp->nd_opt_pi_preferred_time))); + 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: - opr = (struct icmp6_opts_redirect *)op; - print_unknown_data(bp,"\n\t ",op->nd_opt_len<<3); + print_unknown_data(ndo, bp,"\n\t ",opt_len<<3); /* xxx */ break; case ND_OPT_MTU: - opm = (struct nd_opt_mtu *)op; - TCHECK(opm->nd_opt_mtu_mtu); - printf(" %u%s", - EXTRACT_32BITS(&opm->nd_opt_mtu_mtu), - (op->nd_opt_len != 1) ? "bad option length" : "" ); + 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 = (struct nd_opt_rdnss *)op; - l = (op->nd_opt_len - 1) / 2; - printf(" lifetime %us,", - EXTRACT_32BITS(&oprd->nd_opt_rdnss_lifetime)); + 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++) { - TCHECK(oprd->nd_opt_rdnss_addr[i]); - printf(" addr: %s", - ip6addr_string(&oprd->nd_opt_rdnss_addr[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 = (struct nd_opt_advinterval *)op; - TCHECK(opa->nd_opt_adv_interval); - printf(" %us", EXTRACT_32BITS(&opa->nd_opt_adv_interval)); + 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 = (struct nd_opt_homeagent_info *)op; - TCHECK(oph->nd_opt_hai_lifetime); - printf(" preference %u, lifetime %u", - EXTRACT_16BITS(&oph->nd_opt_hai_preference), - EXTRACT_16BITS(&oph->nd_opt_hai_lifetime)); + 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 = (struct nd_opt_route_info *)op; - TCHECK(opri->nd_opt_rti_lifetime); + opri = (const struct nd_opt_route_info *)op; + ND_TCHECK_4(opri->nd_opt_rti_lifetime); memset(&in6, 0, sizeof(in6)); - in6p = (struct in6_addr *)(opri + 1); - switch (op->nd_opt_len) { + switch (opt_len) { case 1: break; case 2: - TCHECK2(*in6p, 8); - memcpy(&in6, opri + 1, 8); + GET_CPY_BYTES(&in6, opri + 1, 8); break; case 3: - TCHECK(*in6p); - memcpy(&in6, opri + 1, sizeof(in6)); + GET_CPY_BYTES(&in6, opri + 1, 16); break; default: goto trunc; } - printf(" %s/%u", ip6addr_string(&in6), - opri->nd_opt_rti_prefixlen); - printf(", pref=%s", get_rtpref(opri->nd_opt_rti_flags)); - printf(", lifetime=%s", - get_lifetime(EXTRACT_32BITS(&opri->nd_opt_rti_lifetime))); + 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 (vflag <= 1) { - print_unknown_data(cp+2,"\n\t ", (op->nd_opt_len << 3) - 2); /* skip option header */ - return; + 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 (vflag> 1) - print_unknown_data(cp+2,"\n\t ", (op->nd_opt_len << 3) - 2); /* skip option header */ + if (ndo->ndo_vflag> 1) + print_unknown_data(ndo, cp+2,"\n\t ", (opt_len << 3) - 2); /* skip option header */ - cp += op->nd_opt_len << 3; - resid -= op->nd_opt_len << 3; + cp += opt_len << 3; + resid -= opt_len << 3; } - return; + return 0; - trunc: - fputs("[ndp opt]", stdout); - return; -#undef ECHECK +trunc: + return -1; } static void -mld6_print(const u_char *bp) +mld6_print(netdissect_options *ndo, const u_char *bp) { - struct mld6_hdr *mp = (struct mld6_hdr *)bp; + const struct mld6_hdr *mp = (const struct mld6_hdr *)bp; const u_char *ep; /* 'ep' points to the end of available data. */ - ep = snapend; + ep = ndo->ndo_snapend; - if ((u_char *)mp + sizeof(*mp) > ep) + if ((const u_char *)mp + sizeof(*mp) > ep) return; - printf("max resp delay: %d ", EXTRACT_16BITS(&mp->mld6_maxdelay)); - printf("addr: %s", ip6addr_string(&mp->mld6_addr)); + 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(const u_char *bp, u_int len) +mldv2_report_print(netdissect_options *ndo, const u_char *bp, u_int len) { - struct icmp6_hdr *icp = (struct icmp6_hdr *) bp; + 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) { - printf(" [invalid len %d]", len); - return; + ND_PRINT(" [invalid len %u]", len); + return; } - TCHECK(icp->icmp6_data16[1]); - ngroups = EXTRACT_16BITS(&icp->icmp6_data16[1]); - printf(", %d group record(s)", ngroups); - if (vflag > 0) { + 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) { - printf(" [invalid number of groups]"); - return; + ND_PRINT(" [invalid number of groups]"); + return; } - TCHECK2(bp[group + 4], sizeof(struct in6_addr)); - printf(" [gaddr %s", ip6addr_string(&bp[group + 4])); - printf(" %s", tok2str(mldv2report2str, " [v2-report-#%d]", - bp[group])); - nsrcs = (bp[group + 2] << 8) + bp[group + 3]; + 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(struct in6_addr))) { - printf(" [invalid number of sources %d]", nsrcs); - return; + if (len < group + 20 + (nsrcs * sizeof(nd_ipv6))) { + ND_PRINT(" [invalid number of sources %u]", nsrcs); + return; } - if (vflag == 1) - printf(", %d source(s)", nsrcs); + if (ndo->ndo_vflag == 1) + ND_PRINT(", %u source(s)", nsrcs); else { /* Print the sources */ - (void)printf(" {"); + ND_PRINT(" {"); for (j = 0; j < nsrcs; j++) { - TCHECK2(bp[group + 20 + j * sizeof(struct in6_addr)], - sizeof(struct in6_addr)); - printf(" %s", ip6addr_string(&bp[group + 20 + j * sizeof(struct in6_addr)])); + ND_PRINT(" %s", GET_IP6ADDR_STRING(bp + group + 20 + (j * sizeof(nd_ipv6)))); } - (void)printf(" }"); + ND_PRINT(" }"); } /* Next group record */ - group += 20 + nsrcs * sizeof(struct in6_addr); - printf("]"); + group += 20 + nsrcs * sizeof(nd_ipv6); + ND_PRINT("]"); } } - return; -trunc: - (void)printf("[|icmp6]"); - return; } static void -mldv2_query_print(const u_char *bp, u_int len) +mldv2_query_print(netdissect_options *ndo, const u_char *bp, u_int len) { - struct icmp6_hdr *icp = (struct icmp6_hdr *) bp; + const struct icmp6_hdr *icp = (const struct icmp6_hdr *) bp; u_int mrc; - int mrt, qqi; + u_int mrt, qqi; u_int nsrcs; - register u_int i; + u_int i; /* Minimum len is 28 */ if (len < 28) { - printf(" [invalid len %d]", len); + ND_PRINT(" [invalid len %u]", len); return; } - TCHECK(icp->icmp6_data16[0]); - mrc = EXTRACT_16BITS(&icp->icmp6_data16[0]); + mrc = GET_BE_U_2(icp->icmp6_data16[0]); if (mrc < 32768) { mrt = mrc; } else { mrt = ((mrc & 0x0fff) | 0x1000) << (((mrc & 0x7000) >> 12) + 3); } - if (vflag) { - (void)printf(" [max resp delay=%d]", mrt); + if (ndo->ndo_vflag) { + ND_PRINT(" [max resp delay=%u]", mrt); } - TCHECK2(bp[8], sizeof(struct in6_addr)); - printf(" [gaddr %s", ip6addr_string(&bp[8])); + ND_PRINT(" [gaddr %s", GET_IP6ADDR_STRING(bp + 8)); - if (vflag) { - TCHECK(bp[25]); - if (bp[24] & 0x08) { - printf(" sflag"); + if (ndo->ndo_vflag) { + if (GET_U_1(bp + 24) & 0x08) { + ND_PRINT(" sflag"); } - if (bp[24] & 0x07) { - printf(" robustness=%d", bp[24] & 0x07); + if (GET_U_1(bp + 24) & 0x07) { + ND_PRINT(" robustness=%u", GET_U_1(bp + 24) & 0x07); } - if (bp[25] < 128) { - qqi = bp[25]; + if (GET_U_1(bp + 25) < 128) { + qqi = GET_U_1(bp + 25); } else { - qqi = ((bp[25] & 0x0f) | 0x10) << (((bp[25] & 0x70) >> 4) + 3); + qqi = ((GET_U_1(bp + 25) & 0x0f) | 0x10) << + (((GET_U_1(bp + 25) & 0x70) >> 4) + 3); } - printf(" qqi=%d", qqi); + ND_PRINT(" qqi=%u", qqi); } - TCHECK2(bp[26], 2); - nsrcs = EXTRACT_16BITS(&bp[26]); + nsrcs = GET_BE_U_2(bp + 26); if (nsrcs > 0) { - if (len < 28 + nsrcs * sizeof(struct in6_addr)) - printf(" [invalid number of sources]"); - else if (vflag > 1) { - printf(" {"); + 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++) { - TCHECK2(bp[28 + i * sizeof(struct in6_addr)], - sizeof(struct in6_addr)); - printf(" %s", ip6addr_string(&bp[28 + i * sizeof(struct in6_addr)])); + ND_PRINT(" %s", GET_IP6ADDR_STRING(bp + 28 + (i * sizeof(nd_ipv6)))); } - printf(" }"); + ND_PRINT(" }"); } else - printf(", %d source(s)", nsrcs); + ND_PRINT(", %u source(s)", nsrcs); } - printf("]"); - return; -trunc: - (void)printf("[|icmp6]"); - return; + ND_PRINT("]"); } static void -dnsname_print(const u_char *cp, const u_char *ep) +dnsname_print(netdissect_options *ndo, const u_char *cp, const u_char *ep) { int i; /* DNS name decoding - no decompression */ - printf(", \""); + ND_PRINT(", \""); while (cp < ep) { - i = *cp++; + i = GET_U_1(cp); + cp++; if (i) { if (i > ep - cp) { - printf("???"); + ND_PRINT("???"); break; } while (i-- && cp < ep) { - safeputchar(*cp); + fn_print_char(ndo, GET_U_1(cp)); cp++; } - if (cp + 1 < ep && *cp) - printf("."); + if (cp + 1 < ep && GET_U_1(cp)) + ND_PRINT("."); } else { if (cp == ep) { /* FQDN */ - printf("."); - } else if (cp + 1 == ep && *cp == '\0') { + ND_PRINT("."); + } else if (cp + 1 == ep && GET_U_1(cp) == '\0') { /* truncated */ } else { /* invalid */ - printf("???"); + ND_PRINT("???"); } break; } } - printf("\""); + ND_PRINT("\""); } static void -icmp6_nodeinfo_print(u_int icmp6len, const u_char *bp, const u_char *ep) +icmp6_nodeinfo_print(netdissect_options *ndo, u_int icmp6len, const u_char *bp, const u_char *ep) { - struct icmp6_nodeinfo *ni6; - struct icmp6_hdr *dp; + 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 = (struct icmp6_hdr *)bp; - ni6 = (struct icmp6_nodeinfo *)bp; + dp = (const struct icmp6_hdr *)bp; + ni6 = (const struct icmp6_nodeinfo *)bp; siz = ep - bp; - switch (ni6->ni_type) { + switch (GET_U_1(ni6->ni_type)) { case ICMP6_NI_QUERY: if (siz == sizeof(*dp) + 4) { /* KAME who-are-you */ - printf(" who-are-you request"); + ND_PRINT(" who-are-you request"); break; } - printf(" node information query"); + ND_PRINT(" node information query"); - TCHECK2(*dp, sizeof(*ni6)); - ni6 = (struct icmp6_nodeinfo *)dp; - printf(" ("); /*)*/ - switch (EXTRACT_16BITS(&ni6->ni_qtype)) { + 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: - printf("noop"); + ND_PRINT("noop"); break; case NI_QTYPE_SUPTYPES: - printf("supported qtypes"); - i = EXTRACT_16BITS(&ni6->ni_flags); + ND_PRINT("supported qtypes"); + i = GET_BE_U_2(ni6->ni_flags); if (i) - printf(" [%s]", (i & 0x01) ? "C" : ""); - break; + ND_PRINT(" [%s]", (i & 0x01) ? "C" : ""); break; case NI_QTYPE_FQDN: - printf("DNS name"); + ND_PRINT("DNS name"); break; case NI_QTYPE_NODEADDR: - printf("node addresses"); - i = ni6->ni_flags; + ND_PRINT("node addresses"); + i = GET_BE_U_2(ni6->ni_flags); if (!i) break; /* NI_NODEADDR_FLAG_TRUNCATE undefined for query */ - printf(" [%s%s%s%s%s%s]", + 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" : "", @@ -1073,333 +1751,332 @@ icmp6_nodeinfo_print(u_int icmp6len, const u_char *bp, const u_char *ep) (i & NI_NODEADDR_FLAG_ALL) ? "A" : ""); break; default: - printf("unknown"); + ND_PRINT("unknown"); break; } - if (ni6->ni_qtype == NI_QTYPE_NOOP || - ni6->ni_qtype == NI_QTYPE_SUPTYPES) { + 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 (vflag) - printf(", invalid len"); + if (ndo->ndo_vflag) + ND_PRINT(", invalid len"); /*(*/ - printf(")"); + ND_PRINT(")"); break; } - /* XXX backward compat, icmp-name-lookup-03 */ if (siz == sizeof(*ni6)) { - printf(", 03 draft"); + ND_PRINT(", 03 draft"); /*(*/ - printf(")"); + ND_PRINT(")"); break; } - switch (ni6->ni_code) { + cp = (const u_char *)(ni6 + 1); + switch (GET_U_1(ni6->ni_code)) { case ICMP6_NI_SUBJ_IPV6: - if (!TTEST2(*dp, - sizeof(*ni6) + sizeof(struct in6_addr))) + if (!ND_TTEST_LEN(dp, sizeof(*ni6) + sizeof(nd_ipv6))) break; - if (siz != sizeof(*ni6) + sizeof(struct in6_addr)) { - if (vflag) - printf(", invalid subject len"); + if (siz != sizeof(*ni6) + sizeof(nd_ipv6)) { + if (ndo->ndo_vflag) + ND_PRINT(", invalid subject len"); break; } - printf(", subject=%s", - getname6((const u_char *)(ni6 + 1))); + ND_PRINT(", subject=%s", + GET_IP6ADDR_STRING(cp)); break; case ICMP6_NI_SUBJ_FQDN: - printf(", subject=DNS name"); - cp = (const u_char *)(ni6 + 1); - if (cp[0] == ep - cp - 1) { + ND_PRINT(", subject=DNS name"); + if (GET_U_1(cp) == ep - cp - 1) { /* icmp-name-lookup-03, pascal string */ - if (vflag) - printf(", 03 draft"); + if (ndo->ndo_vflag) + ND_PRINT(", 03 draft"); cp++; - printf(", \""); + ND_PRINT(", \""); while (cp < ep) { - safeputchar(*cp); + fn_print_char(ndo, GET_U_1(cp)); cp++; } - printf("\""); + ND_PRINT("\""); } else - dnsname_print(cp, ep); + dnsname_print(ndo, cp, ep); break; case ICMP6_NI_SUBJ_IPV4: - if (!TTEST2(*dp, sizeof(*ni6) + sizeof(struct in_addr))) + if (!ND_TTEST_LEN(dp, sizeof(*ni6) + sizeof(nd_ipv4))) break; - if (siz != sizeof(*ni6) + sizeof(struct in_addr)) { - if (vflag) - printf(", invalid subject len"); + if (siz != sizeof(*ni6) + sizeof(nd_ipv4)) { + if (ndo->ndo_vflag) + ND_PRINT(", invalid subject len"); break; } - printf(", subject=%s", - getname((const u_char *)(ni6 + 1))); + ND_PRINT(", subject=%s", + GET_IPADDR_STRING(cp)); break; default: - printf(", unknown subject"); + ND_PRINT(", unknown subject"); break; } /*(*/ - printf(")"); + ND_PRINT(")"); break; case ICMP6_NI_REPLY: - if (icmp6len > siz) { - printf("[|icmp6: node information reply]"); - break; - } + if (icmp6len > siz) + goto trunc; needcomma = 0; - ni6 = (struct icmp6_nodeinfo *)dp; - printf(" node information reply"); - printf(" ("); /*)*/ - switch (ni6->ni_code) { + 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 (vflag) { - printf("success"); + if (ndo->ndo_vflag) { + ND_PRINT("success"); needcomma++; } break; case ICMP6_NI_REFUSED: - printf("refused"); + ND_PRINT("refused"); needcomma++; if (siz != sizeof(*ni6)) - if (vflag) - printf(", invalid length"); + if (ndo->ndo_vflag) + ND_PRINT(", invalid length"); break; case ICMP6_NI_UNKNOWN: - printf("unknown"); + ND_PRINT("unknown"); needcomma++; if (siz != sizeof(*ni6)) - if (vflag) - printf(", invalid length"); + if (ndo->ndo_vflag) + ND_PRINT(", invalid length"); break; } - if (ni6->ni_code != ICMP6_NI_SUCCESS) { + if (GET_U_1(ni6->ni_code) != ICMP6_NI_SUCCESS) { /*(*/ - printf(")"); + ND_PRINT(")"); break; } - switch (EXTRACT_16BITS(&ni6->ni_qtype)) { + switch (GET_BE_U_2(ni6->ni_qtype)) { case NI_QTYPE_NOOP: if (needcomma) - printf(", "); - printf("noop"); + ND_PRINT(", "); + ND_PRINT("noop"); if (siz != sizeof(*ni6)) - if (vflag) - printf(", invalid length"); + if (ndo->ndo_vflag) + ND_PRINT(", invalid length"); break; case NI_QTYPE_SUPTYPES: if (needcomma) - printf(", "); - printf("supported qtypes"); - i = EXTRACT_16BITS(&ni6->ni_flags); + ND_PRINT(", "); + ND_PRINT("supported qtypes"); + i = GET_BE_U_2(ni6->ni_flags); if (i) - printf(" [%s]", (i & 0x01) ? "C" : ""); + ND_PRINT(" [%s]", (i & 0x01) ? "C" : ""); break; case NI_QTYPE_FQDN: if (needcomma) - printf(", "); - printf("DNS name"); + ND_PRINT(", "); + ND_PRINT("DNS name"); cp = (const u_char *)(ni6 + 1) + 4; - if (cp[0] == ep - cp - 1) { + if (GET_U_1(cp) == ep - cp - 1) { /* icmp-name-lookup-03, pascal string */ - if (vflag) - printf(", 03 draft"); + if (ndo->ndo_vflag) + ND_PRINT(", 03 draft"); cp++; - printf(", \""); + ND_PRINT(", \""); while (cp < ep) { - safeputchar(*cp); + fn_print_char(ndo, GET_U_1(cp)); cp++; } - printf("\""); + ND_PRINT("\""); } else - dnsname_print(cp, ep); - if ((EXTRACT_16BITS(&ni6->ni_flags) & 0x01) != 0) - printf(" [TTL=%u]", *(u_int32_t *)(ni6 + 1)); + 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) - printf(", "); - printf("node addresses"); + ND_PRINT(", "); + ND_PRINT("node addresses"); i = sizeof(*ni6); while (i < siz) { - if (i + sizeof(struct in6_addr) + sizeof(int32_t) > siz) + if (i + sizeof(uint32_t) + sizeof(nd_ipv6) > siz) break; - printf(" %s", getname6(bp + i)); - i += sizeof(struct in6_addr); - printf("(%d)", (int32_t)EXTRACT_32BITS(bp + i)); - i += sizeof(int32_t); + 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 = ni6->ni_flags; + i = GET_BE_U_2(ni6->ni_flags); if (!i) break; - printf(" [%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" : ""); + 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) - printf(", "); - printf("unknown"); + ND_PRINT(", "); + ND_PRINT("unknown"); break; } /*(*/ - printf(")"); + ND_PRINT(")"); break; } return; trunc: - fputs("[|icmp6]", stdout); + nd_print_trunc(ndo); } static void -icmp6_rrenum_print(const u_char *bp, const u_char *ep) +icmp6_rrenum_print(netdissect_options *ndo, const u_char *bp, const u_char *ep) { - struct icmp6_router_renum *rr6; + const struct icmp6_router_renum *rr6; const char *cp; - struct rr_pco_match *match; - struct rr_pco_use *use; + const struct rr_pco_match *match; + const struct rr_pco_use *use; char hbuf[NI_MAXHOST]; int n; if (ep < bp) return; - rr6 = (struct icmp6_router_renum *)bp; + rr6 = (const struct icmp6_router_renum *)bp; cp = (const char *)(rr6 + 1); - TCHECK(rr6->rr_reserved); - switch (rr6->rr_code) { + ND_TCHECK_4(rr6->rr_reserved); + switch (GET_U_1(rr6->rr_code)) { case ICMP6_ROUTER_RENUMBERING_COMMAND: - printf("router renum: command"); + ND_PRINT(", command"); break; case ICMP6_ROUTER_RENUMBERING_RESULT: - printf("router renum: result"); + ND_PRINT(", result"); break; case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET: - printf("router renum: sequence number reset"); + ND_PRINT(", sequence number reset"); break; default: - printf("router renum: code-#%d", rr6->rr_code); + ND_PRINT(", code-#%u", GET_U_1(rr6->rr_code)); break; } - printf(", seq=%u", EXTRACT_32BITS(&rr6->rr_seqnum)); - - if (vflag) { -#define F(x, y) ((rr6->rr_flags) & (x) ? (y) : "") - printf("["); /*]*/ - if (rr6->rr_flags) { - printf("%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(", 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")); } - printf("seg=%u,", rr6->rr_segnum); - printf("maxdelay=%u", EXTRACT_16BITS(&rr6->rr_maxdelay)); - if (rr6->rr_reserved) - printf("rsvd=0x%x", EXTRACT_32BITS(&rr6->rr_reserved)); + 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)); /*[*/ - printf("]"); + ND_PRINT("]"); #undef F } - if (rr6->rr_code == ICMP6_ROUTER_RENUMBERING_COMMAND) { - match = (struct rr_pco_match *)cp; + if (GET_U_1(rr6->rr_code) == ICMP6_ROUTER_RENUMBERING_COMMAND) { + match = (const struct rr_pco_match *)cp; cp = (const char *)(match + 1); - TCHECK(match->rpm_prefix); + ND_TCHECK_16(match->rpm_prefix); - if (vflag > 1) - printf("\n\t"); + if (ndo->ndo_vflag > 1) + ND_PRINT("\n\t"); else - printf(" "); - printf("match("); /*)*/ - switch (match->rpm_code) { - case RPM_PCO_ADD: printf("add"); break; - case RPM_PCO_CHANGE: printf("change"); break; - case RPM_PCO_SETGLOBAL: printf("setglobal"); break; - default: printf("#%u", match->rpm_code); break; + 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 (vflag) { - printf(",ord=%u", match->rpm_ordinal); - printf(",min=%u", match->rpm_minlen); - printf(",max=%u", match->rpm_maxlen); + 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 (inet_ntop(AF_INET6, &match->rpm_prefix, hbuf, sizeof(hbuf))) - printf(",%s/%u", hbuf, match->rpm_matchlen); + if (addrtostr6(match->rpm_prefix, hbuf, sizeof(hbuf))) + ND_PRINT(",%s/%u", hbuf, GET_U_1(match->rpm_matchlen)); else - printf(",?/%u", match->rpm_matchlen); + ND_PRINT(",?/%u", GET_U_1(match->rpm_matchlen)); /*(*/ - printf(")"); + ND_PRINT(")"); - n = match->rpm_len - 3; + n = GET_U_1(match->rpm_len) - 3; if (n % 4) goto trunc; n /= 4; while (n-- > 0) { - use = (struct rr_pco_use *)cp; + use = (const struct rr_pco_use *)cp; cp = (const char *)(use + 1); - TCHECK(use->rpu_prefix); + ND_TCHECK_16(use->rpu_prefix); - if (vflag > 1) - printf("\n\t"); + if (ndo->ndo_vflag > 1) + ND_PRINT("\n\t"); else - printf(" "); - printf("use("); /*)*/ - if (use->rpu_flags) { -#define F(x, y) ((use->rpu_flags) & (x) ? (y) : "") - printf("%s%s,", - F(ICMP6_RR_PCOUSE_FLAGS_DECRVLTIME, "V"), - F(ICMP6_RR_PCOUSE_FLAGS_DECRPLTIME, "P")); + 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 (vflag) { - printf("mask=0x%x,", use->rpu_ramask); - printf("raflags=0x%x,", use->rpu_raflags); - if (~use->rpu_vltime == 0) - printf("vltime=infty,"); + 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 - printf("vltime=%u,", - EXTRACT_32BITS(&use->rpu_vltime)); - if (~use->rpu_pltime == 0) - printf("pltime=infty,"); + 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 - printf("pltime=%u,", - EXTRACT_32BITS(&use->rpu_pltime)); + ND_PRINT("pltime=%u,", + GET_BE_U_4(use->rpu_pltime)); } - if (inet_ntop(AF_INET6, &use->rpu_prefix, hbuf, - sizeof(hbuf))) - printf("%s/%u/%u", hbuf, use->rpu_uselen, - use->rpu_keeplen); + 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 - printf("?/%u/%u", use->rpu_uselen, - use->rpu_keeplen); + ND_PRINT("?/%u/%u", GET_U_1(use->rpu_uselen), + GET_U_1(use->rpu_keeplen)); /*(*/ - printf(")"); + ND_PRINT(")"); } } return; trunc: - fputs("[|icmp6]", stdout); + nd_print_trunc(ndo); } - -#endif /* INET6 */