]> The Tcpdump Group git mirrors - tcpdump/blobdiff - print-icmp6.c
Regenerate config files.
[tcpdump] / print-icmp6.c
index 176c15c5a336099051fbf17bd32db0d18830ad7f..7fe639dc833b461aa9021ac65aa1ac3fb140749f 100644 (file)
  * 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"
 #endif
 
-#ifdef INET6
-
-#include <tcpdump-stdinc.h>
+#include <netdissect-stdinc.h>
 
 #include <stdio.h>
 #include <string.h>
 
-#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 {
+       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(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 *);
+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
 
-/* inline the various RPL definitions */
-#define ND_RPL_MESSAGE 0x9B
+#include "rpl.h"
 
-static struct tok icmp6_type_values[] = {
+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 +525,7 @@ 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"},
@@ -107,21 +534,21 @@ 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"},
     { 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" },
@@ -129,13 +556,14 @@ static struct tok icmp6_nd_na_flag_values[] = {
 };
 
 
-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 +571,7 @@ 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" },
@@ -167,123 +595,260 @@ 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((ndo,":"));
+               ND_PRINT((ndo,"%02x", *q++));
                l--;
        }
 }
 
-static int icmp6_cksum(const struct ip6_hdr *ip6, const struct icmp6_hdr *icp,
-       u_int len)
+static int icmp6_cksum(netdissect_options *ndo, const struct ip6_hdr *ip6,
+       const struct icmp6_hdr *icp, u_int len)
 {
-       return (nextproto6_cksum(ip6, (const u_int8_t *)(void *)icp, len,
-           IPPROTO_ICMPV6));
+       return nextproto6_cksum(ndo, ip6, (const uint8_t *)(const void *)icp, len, len,
+                               IPPROTO_ICMPV6);
 }
 
-enum ND_RPL_CODE {
-        ND_RPL_DIS   =0x00,
-        ND_RPL_DIO   =0x01,
-        ND_RPL_DAO   =0x02,
-        ND_RPL_DAO_ACK=0x03,
-        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_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},
 };
 
-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_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 _U_)
+          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;
 
-        ND_TCHECK(dio->rpl_dagid);
-
         if(secured) {
-                ND_PRINT((ndo, ", (SEC)"));
+                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_DIS:
+        case ND_RPL_DAG_IS:
                 ND_PRINT((ndo, "DODAG Information Solicitation"));
                 if(ndo->ndo_vflag) {
                 }
                 break;
-        case ND_RPL_DIO:
+        case ND_RPL_DAG_IO:
                 ND_PRINT((ndo, "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"));
                 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:
@@ -291,10 +856,13 @@ rpl_print(netdissect_options *ndo,
                 break;
         }
        return;
+
+#if 0
 trunc:
        ND_PRINT((ndo," [|truncated]"));
        return;
-        
+#endif
+
 }
 
 
@@ -310,302 +878,303 @@ icmp6_print(netdissect_options *ndo,
        const u_char *ep;
        u_int prot;
 
-       dp = (struct icmp6_hdr *)bp;
-       ip = (struct ip6_hdr *)bp2;
-       oip = (struct ip6_hdr *)(dp + 1);
+       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;
+       ep = ndo->ndo_snapend;
 
-       TCHECK(dp->icmp6_cksum);
+       ND_TCHECK(dp->icmp6_cksum);
 
-       if (vflag && !fragmented) {
-               u_int16_t sum, udp_sum;
+       if (ndo->ndo_vflag && !fragmented) {
+               uint16_t sum, udp_sum;
 
-               if (TTEST2(bp[0], length)) {
+               if (ND_TTEST2(bp[0], length)) {
                        udp_sum = EXTRACT_16BITS(&dp->icmp6_cksum);
-                       sum = icmp6_cksum(ip, dp, length);
+                       sum = icmp6_cksum(ndo, ip, dp, length);
                        if (sum != 0)
-                               (void)printf("[bad icmp6 cksum 0x%04x -> 0x%04x!] ",
-                                   udp_sum,
-                                   in_cksum_shouldbe(udp_sum, sum));
+                               ND_PRINT((ndo,"[bad icmp6 cksum 0x%04x -> 0x%04x!] ",
+                                                udp_sum,
+                                                in_cksum_shouldbe(udp_sum, sum)));
                        else
-                               (void)printf("[icmp6 sum ok] ");
+                               ND_PRINT((ndo,"[icmp6 sum ok] "));
                }
        }
 
-        printf("ICMP6, %s", tok2str(icmp6_type_values,"unknown icmp6 type (%u)",dp->icmp6_type));
+        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 (vflag && (dp->icmp6_type == ND_ROUTER_SOLICIT ||
+        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 ))
-            printf(", length %u", length);
-                      
+                ND_PRINT((ndo,", length %u", length));
+
        switch (dp->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));
+               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:
-                        printf(" %s",ip6addr_string(&oip->ip6_dst));
+                        ND_PRINT((ndo," %s",ip6addr_string(ndo, &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((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((u_char *)oip, &prot))
+                       if ((ouh = get_upperlayer(ndo, (const u_char *)oip, &prot))
                            == NULL)
                                goto trunc;
 
                        dport = EXTRACT_16BITS(&ouh->uh_dport);
                        switch (prot) {
                        case IPPROTO_TCP:
-                               printf(", %s tcp port %s",
-                                       ip6addr_string(&oip->ip6_dst),
-                                       tcpport_string(dport));
+                               ND_PRINT((ndo,", %s tcp port %s",
+                                       ip6addr_string(ndo, &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((ndo,", %s udp port %s",
+                                       ip6addr_string(ndo, &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((ndo,", %s protocol %d port %d unreachable",
+                                       ip6addr_string(ndo, &oip->ip6_dst),
+                                          oip->ip6_nxt, 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_TCHECK(dp->icmp6_mtu);
+               ND_PRINT((ndo,", mtu %u", EXTRACT_32BITS(&dp->icmp6_mtu)));
                break;
        case ICMP6_TIME_EXCEEDED:
-               TCHECK(oip->ip6_dst);
+               ND_TCHECK(oip->ip6_dst);
                switch (dp->icmp6_code) {
                case ICMP6_TIME_EXCEED_TRANSIT:
-                       printf(" for %s",
-                               ip6addr_string(&oip->ip6_dst));
+                       ND_PRINT((ndo," for %s",
+                                  ip6addr_string(ndo, &oip->ip6_dst)));
                        break;
                case ICMP6_TIME_EXCEED_REASSEMBLY:
-                       printf(" (reassembly)");
+                       ND_PRINT((ndo," (reassembly)"));
                        break;
                default:
-                       printf(", unknown code (%u)", dp->icmp6_code);
+                        ND_PRINT((ndo,", unknown code (%u)", dp->icmp6_code));
                        break;
                }
                break;
        case ICMP6_PARAM_PROB:
-               TCHECK(oip->ip6_dst);
+               ND_TCHECK(oip->ip6_dst);
                switch (dp->icmp6_code) {
                case ICMP6_PARAMPROB_HEADER:
-                       printf(", errorneous - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr));
-                       break;
+                        ND_PRINT((ndo,", erroneous - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)));
+                        break;
                case ICMP6_PARAMPROB_NEXTHEADER:
-                       printf(", next header - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr));
-                       break;
+                        ND_PRINT((ndo,", next header - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)));
+                        break;
                case ICMP6_PARAMPROB_OPTION:
-                       printf(", option - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr));
-                       break;
+                        ND_PRINT((ndo,", option - octet %u", EXTRACT_32BITS(&dp->icmp6_pptr)));
+                        break;
                default:
-                       printf(", code-#%d",
-                              dp->icmp6_code);
-                       break;
+                        ND_PRINT((ndo,", code-#%d",
+                                  dp->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_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((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((ndo," v2"));
+                       mldv2_query_print(ndo, (const u_char *)dp, length);
                } else {
-                       printf(" unknown-version (len %u) ", length);
+                        ND_PRINT((ndo," 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,
+               if (ndo->ndo_vflag) {
+                       icmp6_opt_print(ndo, (const u_char *)dp + RTSOLLEN,
                                        length - RTSOLLEN);
                }
                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,
+               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:
            {
-               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_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((const u_char *)dp + NDSOLLEN,
+                       icmp6_opt_print(ndo, (const u_char *)dp + NDSOLLEN,
                                        length - NDSOLLEN);
                }
            }
                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_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((const u_char *)dp + NDADVLEN,
+                       icmp6_opt_print(ndo, (const u_char *)dp + NDADVLEN,
                                        length - NDADVLEN);
 #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));
+#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 (vflag) {
-                       icmp6_opt_print((const u_char *)dp + REDIRECTLEN,
+               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(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_TCHECK(dp->icmp6_data16[0]);
+                ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&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 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 (vflag) {
-                       TCHECK(dp->icmp6_data16[0]);
-                       printf(", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0]));
+               if (ndo->ndo_vflag) {
+                       ND_TCHECK(dp->icmp6_data16[0]);
+                       ND_PRINT((ndo,", id 0x%04x", EXTRACT_16BITS(&dp->icmp6_data16[0])));
                        if (dp->icmp6_data16[1] & 0xc0)
-                               printf(" ");
+                               ND_PRINT((ndo," "));
                        if (dp->icmp6_data16[1] & 0x80)
-                               printf("M");
+                               ND_PRINT((ndo,"M"));
                        if (dp->icmp6_data16[1] & 0x40)
-                               printf("O");
+                               ND_PRINT((ndo,"O"));
 #define MPADVLEN 8
-                       icmp6_opt_print((const u_char *)dp + MPADVLEN,
+                       icmp6_opt_print(ndo, (const u_char *)dp + MPADVLEN,
                                        length - MPADVLEN);
                }
                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, dp, &dp->icmp6_data8[0], length-sizeof(struct icmp6_hdr)+4);
                 break;
        default:
-                printf(", length %u", length);
-                if (vflag <= 1)
-                    print_unknown_data(bp,"\n\t", length);
+                ND_PRINT((ndo,", 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((ndo,", length %u", length));
        return;
 trunc:
-       fputs("[|icmp6]", stdout);
+       ND_PRINT((ndo, "[|icmp6]"));
 }
 
-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(ip6->ip6_nxt))
                return NULL;
 
        nh = ip6->ip6_nxt;
@@ -617,8 +1186,8 @@ 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(uh->uh_dport)) {
                                *prot = nh;
                                return(uh);
                        }
@@ -629,16 +1198,16 @@ 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(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 = (struct ip6_frag *)bp;
-                       if (!TTEST(fragh->ip6f_offlg))
+                       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)
@@ -648,8 +1217,8 @@ get_upperlayer(u_char *bp, u_int *prot)
                        break;
 
                case IPPROTO_AH:
-                       ah = (struct ah *)bp;
-                       if (!TTEST(ah->ah_len))
+                       ah = (const struct ah *)bp;
+                       if (!ND_TTEST(ah->ah_len))
                                return(NULL);
                        nh = ah->ah_nxt;
                        hlen = (ah->ah_len + 2) << 2;
@@ -665,30 +1234,30 @@ get_upperlayer(u_char *bp, u_int *prot)
 }
 
 static void
-icmp6_opt_print(const u_char *bp, int resid)
+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? */
        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;
+       struct in6_addr in6;
+       const struct in6_addr *in6p;
        size_t l;
        u_int i;
 
-#define ECHECK(var) if ((u_char *)&(var) > ep - sizeof(var)) return
+#define ECHECK(var) if ((const 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);
                if (resid <= 0)
@@ -698,104 +1267,113 @@ icmp6_opt_print(const u_char *bp, int resid)
                if (cp + (op->nd_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((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:
-                       opl = (struct nd_opt_hdr *)op;
                        l = (op->nd_opt_len << 3) - 2;
-                       print_lladdr(cp + 2, l);
+                       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);
+                       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_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:
-                       opr = (struct icmp6_opts_redirect *)op;
-                        print_unknown_data(bp,"\n\t    ",op->nd_opt_len<<3);
+                        print_unknown_data(ndo, bp,"\n\t    ",op->nd_opt_len<<3);
                        /* xxx */
                        break;
                case ND_OPT_MTU:
-                       opm = (struct nd_opt_mtu *)op;
-                       TCHECK(opm->nd_opt_mtu_mtu);
-                       printf(" %u%s",
+                       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" : "" );
+                                  (op->nd_opt_len != 1) ? "bad option length" : "" ));
                         break;
                case ND_OPT_RDNSS:
-                       oprd = (struct nd_opt_rdnss *)op;
+                       oprd = (const struct nd_opt_rdnss *)op;
                        l = (op->nd_opt_len - 1) / 2;
-                       printf(" lifetime %us,", 
-                               EXTRACT_32BITS(&oprd->nd_opt_rdnss_lifetime)); 
+                       ND_PRINT((ndo," lifetime %us,",
+                                  EXTRACT_32BITS(&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_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 = (struct nd_opt_advinterval *)op;
-                       TCHECK(opa->nd_opt_adv_interval);
-                       printf(" %ums", EXTRACT_32BITS(&opa->nd_opt_adv_interval));
+                       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 = (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_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 = (struct nd_opt_route_info *)op;
-                       TCHECK(opri->nd_opt_rti_lifetime);
+                       opri = (const struct nd_opt_route_info *)op;
+                       ND_TCHECK(opri->nd_opt_rti_lifetime);
                        memset(&in6, 0, sizeof(in6));
-                       in6p = (struct in6_addr *)(opri + 1);
+                       in6p = (const struct in6_addr *)(opri + 1);
                        switch (op->nd_opt_len) {
                        case 1:
                                break;
                        case 2:
-                               TCHECK2(*in6p, 8);
+                               ND_TCHECK2(*in6p, 8);
                                memcpy(&in6, opri + 1, 8);
                                break;
                        case 3:
-                               TCHECK(*in6p);
+                               ND_TCHECK(*in6p);
                                memcpy(&in6, opri + 1, sizeof(in6));
                                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((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 (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  ", (op->nd_opt_len << 3) - 2); /* skip option header */
                             return;
                         }
                         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    ", (op->nd_opt_len << 3) - 2); /* skip option header */
 
                cp += op->nd_opt_len << 3;
                resid -= op->nd_opt_len << 3;
@@ -803,89 +1381,89 @@ icmp6_opt_print(const u_char *bp, int resid)
        return;
 
  trunc:
-       fputs("[ndp opt]", stdout);
+       ND_PRINT((ndo, "[ndp opt]"));
        return;
 #undef ECHECK
 }
 
 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((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(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((ndo," [invalid len %d]", len));
+            return;
     }
 
-    TCHECK(icp->icmp6_data16[1]);
+    ND_TCHECK(icp->icmp6_data16[1]);
     ngroups = EXTRACT_16BITS(&icp->icmp6_data16[1]);
-    printf(", %d group record(s)", ngroups);
-    if (vflag > 0) {
+    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) {
-               printf(" [invalid number of groups]");
-               return;
+                    ND_PRINT((ndo," [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]));
+            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))) {
-               printf(" [invalid number of sources %d]", nsrcs);
-               return;
+                    ND_PRINT((ndo," [invalid number of sources %d]", nsrcs));
+                    return;
            }
-            if (vflag == 1)
-                printf(", %d source(s)", nsrcs);
+            if (ndo->ndo_vflag == 1)
+                    ND_PRINT((ndo,", %d source(s)", nsrcs));
             else {
                /* Print the sources */
-                (void)printf(" {");
+                    ND_PRINT((ndo," {"));
                 for (j = 0; j < nsrcs; j++) {
-                    TCHECK2(bp[group + 20 + j * sizeof(struct in6_addr)],
+                    ND_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((ndo," %s", ip6addr_string(ndo, &bp[group + 20 + j * sizeof(struct in6_addr)])));
                }
-                (void)printf(" }");
+                ND_PRINT((ndo," }"));
             }
            /* Next group record */
             group += 20 + nsrcs * sizeof(struct in6_addr);
-           printf("]");
+           ND_PRINT((ndo,"]"));
         }
     }
     return;
 trunc:
-    (void)printf("[|icmp6]");
+    ND_PRINT((ndo,"[|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 nsrcs;
@@ -893,480 +1471,483 @@ mldv2_query_print(const u_char *bp, u_int len)
 
     /* Minimum len is 28 */
     if (len < 28) {
-       printf(" [invalid len %d]", len);
+            ND_PRINT((ndo," [invalid len %d]", len));
        return;
     }
-    TCHECK(icp->icmp6_data16[0]);
+    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 (vflag) {
-       (void)printf(" [max resp delay=%d]", mrt);
+    if (ndo->ndo_vflag) {
+            ND_PRINT((ndo," [max resp delay=%d]", mrt));
     }
-    TCHECK2(bp[8], sizeof(struct in6_addr));
-    printf(" [gaddr %s", ip6addr_string(&bp[8]));
+    ND_TCHECK2(bp[8], sizeof(struct in6_addr));
+    ND_PRINT((ndo," [gaddr %s", ip6addr_string(ndo, &bp[8])));
 
-    if (vflag) {
-        TCHECK(bp[25]);
+    if (ndo->ndo_vflag) {
+        ND_TCHECK(bp[25]);
        if (bp[24] & 0x08) {
-               printf(" sflag");
+               ND_PRINT((ndo," sflag"));
        }
        if (bp[24] & 0x07) {
-               printf(" robustness=%d", 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);
        }
-       printf(" qqi=%d", qqi);
+       ND_PRINT((ndo," qqi=%d", qqi));
     }
 
-    TCHECK2(bp[26], 2);
+    ND_TCHECK2(bp[26], 2);
     nsrcs = EXTRACT_16BITS(&bp[26]);
     if (nsrcs > 0) {
        if (len < 28 + nsrcs * sizeof(struct in6_addr))
-           printf(" [invalid number of sources]");
-       else if (vflag > 1) {
-           printf(" {");
+           ND_PRINT((ndo," [invalid number of sources]"));
+       else if (ndo->ndo_vflag > 1) {
+           ND_PRINT((ndo," {"));
            for (i = 0; i < nsrcs; i++) {
-               TCHECK2(bp[28 + i * sizeof(struct in6_addr)],
+               ND_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((ndo," %s", ip6addr_string(ndo, &bp[28 + i * sizeof(struct in6_addr)])));
            }
-           printf(" }");
+           ND_PRINT((ndo," }"));
        } else
-           printf(", %d source(s)", nsrcs);
+                ND_PRINT((ndo,", %d source(s)", nsrcs));
     }
-    printf("]");
+    ND_PRINT((ndo,"]"));
     return;
 trunc:
-    (void)printf("[|icmp6]");
+    ND_PRINT((ndo,"[|icmp6]"));
     return;
 }
 
 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((ndo,", \""));
        while (cp < ep) {
                i = *cp++;
                if (i) {
                        if (i > ep - cp) {
-                               printf("???");
+                               ND_PRINT((ndo,"???"));
                                break;
                        }
                        while (i-- && cp < ep) {
-                               safeputchar(*cp);
+                               safeputchar(ndo, *cp);
                                cp++;
                        }
                        if (cp + 1 < ep && *cp)
-                               printf(".");
+                               ND_PRINT((ndo,"."));
                } else {
                        if (cp == ep) {
                                /* FQDN */
-                               printf(".");
+                               ND_PRINT((ndo,"."));
                        } else if (cp + 1 == ep && *cp == '\0') {
                                /* truncated */
                        } else {
                                /* invalid */
-                               printf("???");
+                               ND_PRINT((ndo,"???"));
                        }
                        break;
                }
        }
-       printf("\"");
+       ND_PRINT((ndo,"\""));
 }
 
 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) {
        case ICMP6_NI_QUERY:
                if (siz == sizeof(*dp) + 4) {
                        /* KAME who-are-you */
-                       printf(" who-are-you request");
+                       ND_PRINT((ndo," who-are-you request"));
                        break;
                }
-               printf(" node information query");
+               ND_PRINT((ndo," node information query"));
 
-               TCHECK2(*dp, sizeof(*ni6));
-               ni6 = (struct icmp6_nodeinfo *)dp;
-               printf(" (");   /*)*/
+               ND_TCHECK2(*dp, sizeof(*ni6));
+               ni6 = (const struct icmp6_nodeinfo *)dp;
+               ND_PRINT((ndo," ("));   /*)*/
                switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
                case NI_QTYPE_NOOP:
-                       printf("noop");
+                       ND_PRINT((ndo,"noop"));
                        break;
                case NI_QTYPE_SUPTYPES:
-                       printf("supported qtypes");
+                       ND_PRINT((ndo,"supported qtypes"));
                        i = EXTRACT_16BITS(&ni6->ni_flags);
                        if (i)
-                               printf(" [%s]", (i & 0x01) ? "C" : "");
-                       break;
+                               ND_PRINT((ndo," [%s]", (i & 0x01) ? "C" : ""));
                        break;
                case NI_QTYPE_FQDN:
-                       printf("DNS name");
+                       ND_PRINT((ndo,"DNS name"));
                        break;
                case NI_QTYPE_NODEADDR:
-                       printf("node addresses");
+                       ND_PRINT((ndo,"node addresses"));
                        i = ni6->ni_flags;
                        if (!i)
                                break;
                        /* NI_NODEADDR_FLAG_TRUNCATE undefined for query */
-                       printf(" [%s%s%s%s%s%s]",
+                       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" : "");
+                           (i & NI_NODEADDR_FLAG_ALL) ? "A" : ""));
                        break;
                default:
-                       printf("unknown");
+                       ND_PRINT((ndo,"unknown"));
                        break;
                }
 
                if (ni6->ni_qtype == NI_QTYPE_NOOP ||
                    ni6->ni_qtype == NI_QTYPE_SUPTYPES) {
                        if (siz != sizeof(*ni6))
-                               if (vflag)
-                                       printf(", invalid len");
+                               if (ndo->ndo_vflag)
+                                       ND_PRINT((ndo,", invalid len"));
                        /*(*/
-                       printf(")");
+                       ND_PRINT((ndo,")"));
                        break;
                }
 
 
                /* XXX backward compat, icmp-name-lookup-03 */
                if (siz == sizeof(*ni6)) {
-                       printf(", 03 draft");
+                       ND_PRINT((ndo,", 03 draft"));
                        /*(*/
-                       printf(")");
+                       ND_PRINT((ndo,")"));
                        break;
                }
 
                switch (ni6->ni_code) {
                case ICMP6_NI_SUBJ_IPV6:
-                       if (!TTEST2(*dp,
+                       if (!ND_TTEST2(*dp,
                            sizeof(*ni6) + sizeof(struct in6_addr)))
                                break;
                        if (siz != sizeof(*ni6) + sizeof(struct in6_addr)) {
-                               if (vflag)
-                                       printf(", invalid subject len");
+                               if (ndo->ndo_vflag)
+                                       ND_PRINT((ndo,", invalid subject len"));
                                break;
                        }
-                       printf(", subject=%s",
-                           getname6((const u_char *)(ni6 + 1)));
+                       ND_PRINT((ndo,", subject=%s",
+                                  ip6addr_string(ndo, ni6 + 1)));
                        break;
                case ICMP6_NI_SUBJ_FQDN:
-                       printf(", subject=DNS name");
+                       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 (vflag)
-                                       printf(", 03 draft");
+                               if (ndo->ndo_vflag)
+                                       ND_PRINT((ndo,", 03 draft"));
                                cp++;
-                               printf(", \"");
+                               ND_PRINT((ndo,", \""));
                                while (cp < ep) {
-                                       safeputchar(*cp);
+                                       safeputchar(ndo, *cp);
                                        cp++;
                                }
-                               printf("\"");
+                               ND_PRINT((ndo,"\""));
                        } 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_TTEST2(*dp, sizeof(*ni6) + sizeof(struct in_addr)))
                                break;
                        if (siz != sizeof(*ni6) + sizeof(struct in_addr)) {
-                               if (vflag)
-                                       printf(", invalid subject len");
+                               if (ndo->ndo_vflag)
+                                       ND_PRINT((ndo,", invalid subject len"));
                                break;
                        }
-                       printf(", subject=%s",
-                           getname((const u_char *)(ni6 + 1)));
+                       ND_PRINT((ndo,", subject=%s",
+                                  ipaddr_string(ndo, ni6 + 1)));
                        break;
                default:
-                       printf(", unknown subject");
+                       ND_PRINT((ndo,", unknown subject"));
                        break;
                }
 
                /*(*/
-               printf(")");
+               ND_PRINT((ndo,")"));
                break;
 
        case ICMP6_NI_REPLY:
                if (icmp6len > siz) {
-                       printf("[|icmp6: node information reply]");
+                       ND_PRINT((ndo,"[|icmp6: node information reply]"));
                        break;
                }
 
                needcomma = 0;
 
-               ni6 = (struct icmp6_nodeinfo *)dp;
-               printf(" node information reply");
-               printf(" (");   /*)*/
+               ni6 = (const struct icmp6_nodeinfo *)dp;
+               ND_PRINT((ndo," node information reply"));
+               ND_PRINT((ndo," ("));   /*)*/
                switch (ni6->ni_code) {
                case ICMP6_NI_SUCCESS:
-                       if (vflag) {
-                               printf("success");
+                       if (ndo->ndo_vflag) {
+                               ND_PRINT((ndo,"success"));
                                needcomma++;
                        }
                        break;
                case ICMP6_NI_REFUSED:
-                       printf("refused");
+                       ND_PRINT((ndo,"refused"));
                        needcomma++;
                        if (siz != sizeof(*ni6))
-                               if (vflag)
-                                       printf(", invalid length");
+                               if (ndo->ndo_vflag)
+                                       ND_PRINT((ndo,", invalid length"));
                        break;
                case ICMP6_NI_UNKNOWN:
-                       printf("unknown");
+                       ND_PRINT((ndo,"unknown"));
                        needcomma++;
                        if (siz != sizeof(*ni6))
-                               if (vflag)
-                                       printf(", invalid length");
+                               if (ndo->ndo_vflag)
+                                       ND_PRINT((ndo,", invalid length"));
                        break;
                }
 
                if (ni6->ni_code != ICMP6_NI_SUCCESS) {
                        /*(*/
-                       printf(")");
+                       ND_PRINT((ndo,")"));
                        break;
                }
 
                switch (EXTRACT_16BITS(&ni6->ni_qtype)) {
                case NI_QTYPE_NOOP:
                        if (needcomma)
-                               printf(", ");
-                       printf("noop");
+                               ND_PRINT((ndo,", "));
+                       ND_PRINT((ndo,"noop"));
                        if (siz != sizeof(*ni6))
-                               if (vflag)
-                                       printf(", invalid length");
+                               if (ndo->ndo_vflag)
+                                       ND_PRINT((ndo,", invalid length"));
                        break;
                case NI_QTYPE_SUPTYPES:
                        if (needcomma)
-                               printf(", ");
-                       printf("supported qtypes");
+                               ND_PRINT((ndo,", "));
+                       ND_PRINT((ndo,"supported qtypes"));
                        i = EXTRACT_16BITS(&ni6->ni_flags);
                        if (i)
-                               printf(" [%s]", (i & 0x01) ? "C" : "");
+                               ND_PRINT((ndo," [%s]", (i & 0x01) ? "C" : ""));
                        break;
                case NI_QTYPE_FQDN:
                        if (needcomma)
-                               printf(", ");
-                       printf("DNS name");
+                               ND_PRINT((ndo,", "));
+                       ND_PRINT((ndo,"DNS name"));
                        cp = (const u_char *)(ni6 + 1) + 4;
                        if (cp[0] == ep - cp - 1) {
                                /* icmp-name-lookup-03, pascal string */
-                               if (vflag)
-                                       printf(", 03 draft");
+                               if (ndo->ndo_vflag)
+                                       ND_PRINT((ndo,", 03 draft"));
                                cp++;
-                               printf(", \"");
+                               ND_PRINT((ndo,", \""));
                                while (cp < ep) {
-                                       safeputchar(*cp);
+                                       safeputchar(ndo, *cp);
                                        cp++;
                                }
-                               printf("\"");
+                               ND_PRINT((ndo,"\""));
                        } else
-                               dnsname_print(cp, ep);
+                               dnsname_print(ndo, cp, ep);
                        if ((EXTRACT_16BITS(&ni6->ni_flags) & 0x01) != 0)
-                               printf(" [TTL=%u]", *(u_int32_t *)(ni6 + 1));
+                               ND_PRINT((ndo," [TTL=%u]", EXTRACT_32BITS(ni6 + 1)));
                        break;
                case NI_QTYPE_NODEADDR:
                        if (needcomma)
-                               printf(", ");
-                       printf("node addresses");
+                               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;
-                               printf(" %s", getname6(bp + i));
+                               ND_PRINT((ndo," %s", ip6addr_string(ndo, bp + i)));
                                i += sizeof(struct in6_addr);
-                               printf("(%d)", (int32_t)EXTRACT_32BITS(bp + i));
+                               ND_PRINT((ndo,"(%d)", (int32_t)EXTRACT_32BITS(bp + i)));
                                i += sizeof(int32_t);
                        }
                        i = 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((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)
-                               printf(", ");
-                       printf("unknown");
+                               ND_PRINT((ndo,", "));
+                       ND_PRINT((ndo,"unknown"));
                        break;
                }
 
                /*(*/
-               printf(")");
+               ND_PRINT((ndo,")"));
                break;
        }
        return;
 
 trunc:
-       fputs("[|icmp6]", stdout);
+       ND_PRINT((ndo, "[|icmp6]"));
 }
 
 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);
+       ND_TCHECK(rr6->rr_reserved);
        switch (rr6->rr_code) {
        case ICMP6_ROUTER_RENUMBERING_COMMAND:
-               printf("router renum: command");
+               ND_PRINT((ndo,"router renum: command"));
                break;
        case ICMP6_ROUTER_RENUMBERING_RESULT:
-               printf("router renum: result");
+               ND_PRINT((ndo,"router renum: result"));
                break;
        case ICMP6_ROUTER_RENUMBERING_SEQNUM_RESET:
-               printf("router renum: sequence number reset");
+               ND_PRINT((ndo,"router renum: sequence number reset"));
                break;
        default:
-               printf("router renum: code-#%d", rr6->rr_code);
+               ND_PRINT((ndo,"router renum: code-#%d", rr6->rr_code));
                break;
        }
 
-       printf(", seq=%u", EXTRACT_32BITS(&rr6->rr_seqnum));
+        ND_PRINT((ndo,", seq=%u", EXTRACT_32BITS(&rr6->rr_seqnum)));
 
-       if (vflag) {
+       if (ndo->ndo_vflag) {
 #define F(x, y)        ((rr6->rr_flags) & (x) ? (y) : "")
-               printf("[");    /*]*/
+               ND_PRINT((ndo,"["));    /*]*/
                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((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")));
                }
-               printf("seg=%u,", rr6->rr_segnum);
-               printf("maxdelay=%u", EXTRACT_16BITS(&rr6->rr_maxdelay));
+                ND_PRINT((ndo,"seg=%u,", rr6->rr_segnum));
+                ND_PRINT((ndo,"maxdelay=%u", EXTRACT_16BITS(&rr6->rr_maxdelay)));
                if (rr6->rr_reserved)
-                       printf("rsvd=0x%x", EXTRACT_32BITS(&rr6->rr_reserved));
+                       ND_PRINT((ndo,"rsvd=0x%x", EXTRACT_32BITS(&rr6->rr_reserved)));
                /*[*/
-               printf("]");
+               ND_PRINT((ndo,"]"));
 #undef F
        }
 
        if (rr6->rr_code == ICMP6_ROUTER_RENUMBERING_COMMAND) {
-               match = (struct rr_pco_match *)cp;
+               match = (const struct rr_pco_match *)cp;
                cp = (const char *)(match + 1);
 
-               TCHECK(match->rpm_prefix);
+               ND_TCHECK(match->rpm_prefix);
 
-               if (vflag > 1)
-                       printf("\n\t");
+               if (ndo->ndo_vflag > 1)
+                       ND_PRINT((ndo,"\n\t"));
                else
-                       printf(" ");
-               printf("match(");       /*)*/
+                       ND_PRINT((ndo," "));
+               ND_PRINT((ndo,"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;
+               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 (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((ndo,",ord=%u", match->rpm_ordinal));
+                       ND_PRINT((ndo,",min=%u", match->rpm_minlen));
+                       ND_PRINT((ndo,",max=%u", 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((ndo,",%s/%u", hbuf, match->rpm_matchlen));
                else
-                       printf(",?/%u", match->rpm_matchlen);
+                       ND_PRINT((ndo,",?/%u", match->rpm_matchlen));
                /*(*/
-               printf(")");
+               ND_PRINT((ndo,")"));
 
                n = 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(use->rpu_prefix);
 
-                       if (vflag > 1)
-                               printf("\n\t");
+                       if (ndo->ndo_vflag > 1)
+                               ND_PRINT((ndo,"\n\t"));
                        else
-                               printf(" ");
-                       printf("use("); /*)*/
+                               ND_PRINT((ndo," "));
+                       ND_PRINT((ndo,"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((ndo,"%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 (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)
-                                       printf("vltime=infty,");
+                                       ND_PRINT((ndo,"vltime=infty,"));
                                else
-                                       printf("vltime=%u,",
-                                           EXTRACT_32BITS(&use->rpu_vltime));
+                                       ND_PRINT((ndo,"vltime=%u,",
+                                                  EXTRACT_32BITS(&use->rpu_vltime)));
                                if (~use->rpu_pltime == 0)
-                                       printf("pltime=infty,");
+                                       ND_PRINT((ndo,"pltime=infty,"));
                                else
-                                       printf("pltime=%u,",
-                                           EXTRACT_32BITS(&use->rpu_pltime));
+                                       ND_PRINT((ndo,"pltime=%u,",
+                                                  EXTRACT_32BITS(&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((ndo,"%s/%u/%u", hbuf, use->rpu_uselen,
+                                          use->rpu_keeplen));
                        else
-                               printf("?/%u/%u", use->rpu_uselen,
-                                   use->rpu_keeplen);
+                               ND_PRINT((ndo,"?/%u/%u", use->rpu_uselen,
+                                          use->rpu_keeplen));
                        /*(*/
-                       printf(")");
+                        ND_PRINT((ndo,")"));
                }
        }
 
        return;
 
 trunc:
-       fputs("[|icmp6]", stdout);
+       ND_PRINT((ndo,"[|icmp6]"));
 }
 
-#endif /* INET6 */
+/*
+ * Local Variables:
+ * c-style: whitesmith
+ * c-basic-offset: 8
+ * End:
+ */