1 files changed, 904 insertions, 0 deletions
diff --git a/contrib/tcpdump/print-dhcp6.c b/contrib/tcpdump/print-dhcp6.c
new file mode 100644
index 0000000..ec0df76
--- /dev/null
+++ b/contrib/tcpdump/print-dhcp6.c
@@ -0,0 +1,904 @@
+/*
+ * Copyright (C) 1998 and 1999 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.
+ */
+/*
+ * RFC3315: DHCPv6
+ * supported DHCPv6 options: 
+ *  RFC3319,
+ *  RFC3633,
+ *  RFC3646,
+ *  RFC3898,
+ *  RFC4075,
+ *  RFC4242,
+ *  RFC4280,
+ */
+
+#ifndef lint
+static const char rcsid[] _U_ =
+    "@(#) $Header: /tcpdump/master/tcpdump/print-dhcp6.c,v 1.36.2.1 2008-02-06 10:26:27 guy Exp $";
+#endif
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <tcpdump-stdinc.h>
+
+#include <stdio.h>
+#include <string.h>
+
+#include "interface.h"
+#include "addrtoname.h"
+#include "extract.h"
+
+/* lease duration */
+#define DHCP6_DURATITION_INFINITE 0xffffffff
+
+/* Error Values */
+#define DH6ERR_FAILURE		16
+#define DH6ERR_AUTHFAIL		17
+#define DH6ERR_POORLYFORMED	18
+#define DH6ERR_UNAVAIL		19
+#define DH6ERR_OPTUNAVAIL	20
+
+/* Message type */
+#define DH6_SOLICIT	1
+#define DH6_ADVERTISE	2
+#define DH6_REQUEST	3
+#define DH6_CONFIRM	4
+#define DH6_RENEW	5
+#define DH6_REBIND	6
+#define DH6_REPLY	7
+#define DH6_RELEASE	8
+#define DH6_DECLINE	9
+#define DH6_RECONFIGURE	10
+#define DH6_INFORM_REQ	11
+#define DH6_RELAY_FORW	12
+#define DH6_RELAY_REPLY	13
+#define DH6_LEASEQUERY	14
+#define DH6_LQ_REPLY	15
+
+/* DHCP6 base packet format */
+struct dhcp6 {
+	union {
+		u_int8_t m;
+		u_int32_t x;
+	} dh6_msgtypexid;
+	/* options follow */
+};
+#define dh6_msgtype	dh6_msgtypexid.m
+#define dh6_xid		dh6_msgtypexid.x
+#define DH6_XIDMASK	0x00ffffff
+
+/* DHCPv6 relay messages */
+struct dhcp6_relay {
+	u_int8_t dh6relay_msgtype;
+	u_int8_t dh6relay_hcnt;
+	u_int8_t dh6relay_linkaddr[16];	/* XXX: badly aligned */
+	u_int8_t dh6relay_peeraddr[16];
+	/* options follow */
+};
+
+/* options */
+#define DH6OPT_CLIENTID	1
+#define DH6OPT_SERVERID	2
+#define DH6OPT_IA_NA 3
+#define DH6OPT_IA_TA 4
+#define DH6OPT_IA_ADDR 5
+#define DH6OPT_ORO 6
+#define DH6OPT_PREFERENCE 7
+#  define DH6OPT_PREF_MAX 255
+#define DH6OPT_ELAPSED_TIME 8
+#define DH6OPT_RELAY_MSG 9
+/*#define DH6OPT_SERVER_MSG 10 deprecated */
+#define DH6OPT_AUTH 11
+#  define DH6OPT_AUTHPROTO_DELAYED 2
+#  define DH6OPT_AUTHPROTO_RECONFIG 3
+#  define DH6OPT_AUTHALG_HMACMD5 1
+#  define DH6OPT_AUTHRDM_MONOCOUNTER 0
+#  define DH6OPT_AUTHRECONFIG_KEY 1
+#  define DH6OPT_AUTHRECONFIG_HMACMD5 2
+#define DH6OPT_UNICAST 12
+#define DH6OPT_STATUS_CODE 13
+#  define DH6OPT_STCODE_SUCCESS 0
+#  define DH6OPT_STCODE_UNSPECFAIL 1
+#  define DH6OPT_STCODE_NOADDRAVAIL 2
+#  define DH6OPT_STCODE_NOBINDING 3
+#  define DH6OPT_STCODE_NOTONLINK 4
+#  define DH6OPT_STCODE_USEMULTICAST 5
+#  define DH6OPT_STCODE_NOPREFIXAVAIL 6
+#  define DH6OPT_STCODE_UNKNOWNQUERYTYPE 7
+#  define DH6OPT_STCODE_MALFORMEDQUERY 8
+#  define DH6OPT_STCODE_NOTCONFIGURED 9
+#  define DH6OPT_STCODE_NOTALLOWED 10
+#define DH6OPT_RAPID_COMMIT 14
+#define DH6OPT_USER_CLASS 15
+#define DH6OPT_VENDOR_CLASS 16
+#define DH6OPT_VENDOR_OPTS 17
+#define DH6OPT_INTERFACE_ID 18
+#define DH6OPT_RECONF_MSG 19
+#define DH6OPT_RECONF_ACCEPT 20
+#define DH6OPT_SIP_SERVER_D 21
+#define DH6OPT_SIP_SERVER_A 22
+#define DH6OPT_DNS 23
+#define DH6OPT_DNSNAME 24
+#define DH6OPT_IA_PD 25
+#define DH6OPT_IA_PD_PREFIX 26
+#define DH6OPT_NIS_SERVERS 27
+#define DH6OPT_NISP_SERVERS 28
+#define DH6OPT_NIS_NAME 29
+#define DH6OPT_NISP_NAME 30
+#define DH6OPT_NTP_SERVERS 31
+#define DH6OPT_LIFETIME 32
+#define DH6OPT_BCMCS_SERVER_D 33
+#define DH6OPT_BCMCS_SERVER_A 34
+#define DH6OPT_GEOCONF_CIVIC 36
+#define DH6OPT_REMOTE_ID 37
+#define DH6OPT_SUBSCRIBER_ID 38
+#define DH6OPT_CLIENT_FQDN 39
+#define DH6OPT_PANA_AGENT 40
+#define DH6OPT_NEW_POSIX_TIMEZONE 41
+#define DH6OPT_NEW_TZDB_TIMEZONE 42
+#define DH6OPT_ERO 43
+#define DH6OPT_LQ_QUERY 44
+#define DH6OPT_CLIENT_DATA 45
+#define DH6OPT_CLT_TIME 46
+#define DH6OPT_LQ_RELAY_DATA 47
+#define DH6OPT_LQ_CLIENT_LINK 48
+
+struct dhcp6opt {
+	u_int16_t dh6opt_type;
+	u_int16_t dh6opt_len;
+	/* type-dependent data follows */
+};
+
+struct dhcp6_ia {
+	u_int16_t dh6opt_ia_type;
+	u_int16_t dh6opt_ia_len;
+	u_int32_t dh6opt_ia_iaid;
+	u_int32_t dh6opt_ia_t1;
+	u_int32_t dh6opt_ia_t2;
+};
+
+struct dhcp6_ia_addr {
+	u_int16_t dh6opt_ia_addr_type;
+	u_int16_t dh6opt_ia_addr_len;
+	struct in6_addr dh6opt_ia_addr_addr;
+	u_int32_t dh6opt_ia_addr_pltime;
+	u_int32_t dh6opt_ia_addr_vltime;
+}  __attribute__ ((__packed__));
+
+struct dhcp6_ia_prefix {
+	u_int16_t dh6opt_ia_prefix_type;
+	u_int16_t dh6opt_ia_prefix_len;
+	u_int32_t dh6opt_ia_prefix_pltime;
+	u_int32_t dh6opt_ia_prefix_vltime;
+	u_int8_t dh6opt_ia_prefix_plen;
+	struct in6_addr dh6opt_ia_prefix_addr;
+}  __attribute__ ((__packed__));
+
+struct dhcp6_auth {
+	u_int16_t dh6opt_auth_type;
+	u_int16_t dh6opt_auth_len;
+	u_int8_t dh6opt_auth_proto;
+	u_int8_t dh6opt_auth_alg;
+	u_int8_t dh6opt_auth_rdm;
+	u_int8_t dh6opt_auth_rdinfo[8];
+	/* authentication information follows */
+} __attribute__ ((__packed__));
+
+static const char *
+dhcp6opt_name(int type)
+{
+	static char genstr[sizeof("opt_65535") + 1]; /* XXX thread unsafe */
+
+	if (type > 65535)
+		return "INVALID option";
+
+	switch(type) {
+	case DH6OPT_CLIENTID:
+		return "client ID";
+	case DH6OPT_SERVERID:
+		return "server ID";
+	case DH6OPT_IA_NA:
+		return "IA_NA";
+	case DH6OPT_IA_TA:
+		return "IA_TA";
+	case DH6OPT_IA_ADDR:
+		return "IA_ADDR";
+	case DH6OPT_ORO:
+		return "option request";
+	case DH6OPT_PREFERENCE:
+		return "preference";
+	case DH6OPT_ELAPSED_TIME:
+		return "elapsed time";
+	case DH6OPT_RELAY_MSG:
+		return "relay message";
+	case DH6OPT_AUTH:
+		return "authentication";
+	case DH6OPT_UNICAST:
+		return "server unicast";
+	case DH6OPT_STATUS_CODE:
+		return "status code";
+	case DH6OPT_RAPID_COMMIT:
+		return "rapid commit";
+	case DH6OPT_USER_CLASS:
+		return "user class";
+	case DH6OPT_VENDOR_CLASS:
+		return "vendor class";
+	case DH6OPT_VENDOR_OPTS:
+		return "vendor-specific info";
+	case DH6OPT_INTERFACE_ID:
+		return "interface ID";
+	case DH6OPT_RECONF_MSG:
+		return "reconfigure message";
+	case DH6OPT_RECONF_ACCEPT:
+		return "reconfigure accept";
+	case DH6OPT_SIP_SERVER_D:
+		return "SIP servers domain";
+	case DH6OPT_SIP_SERVER_A:
+		return "SIP servers address";
+	case DH6OPT_DNS:
+		return "DNS";
+	case DH6OPT_DNSNAME:
+		return "DNS name";
+	case DH6OPT_IA_PD:
+		return "IA_PD";
+	case DH6OPT_IA_PD_PREFIX:
+		return "IA_PD prefix";
+	case DH6OPT_NTP_SERVERS:
+		return "NTP Server";
+	case DH6OPT_LIFETIME:
+		return "lifetime";
+	case DH6OPT_NIS_SERVERS:
+		return "NIS server";
+	case DH6OPT_NISP_SERVERS:
+		return "NIS+ server";
+	case DH6OPT_NIS_NAME:
+		return "NIS domain name";
+	case DH6OPT_NISP_NAME:
+		return "NIS+ domain name";
+	case DH6OPT_BCMCS_SERVER_D:
+		return "BCMCS domain name";
+	case DH6OPT_BCMCS_SERVER_A:
+		return "BCMCS server";
+	case DH6OPT_GEOCONF_CIVIC:
+		return "Geoconf Civic";
+	case DH6OPT_REMOTE_ID:
+		return "Remote ID";
+	case DH6OPT_SUBSCRIBER_ID:
+		return "Subscriber ID";
+	case DH6OPT_CLIENT_FQDN:
+		return "Client FQDN";
+	case DH6OPT_PANA_AGENT:
+		return "PANA agent";
+	case DH6OPT_NEW_POSIX_TIMEZONE:
+		return "POSIX timezone";
+	case DH6OPT_NEW_TZDB_TIMEZONE:
+		return "POSIX tz database";
+	case DH6OPT_ERO:
+		return "Echo request option";
+	case DH6OPT_LQ_QUERY:
+		return "Lease query";
+	case DH6OPT_CLIENT_DATA:
+		return "LQ client data";
+	case DH6OPT_CLT_TIME:
+		return "Clt time";
+	case DH6OPT_LQ_RELAY_DATA:
+		return "LQ relay data";
+	case DH6OPT_LQ_CLIENT_LINK:
+		return "LQ client link";
+	default:
+		snprintf(genstr, sizeof(genstr), "opt_%d", type);
+		return(genstr);
+	}
+}
+
+static const char *
+dhcp6stcode(int code)
+{
+	static char genstr[sizeof("code255") + 1]; /* XXX thread unsafe */
+
+	if (code > 255)
+		return "INVALID code";
+
+	switch(code) {
+	case DH6OPT_STCODE_SUCCESS:
+		return "success";
+	case DH6OPT_STCODE_UNSPECFAIL:
+		return "unspec failure";
+	case DH6OPT_STCODE_NOADDRAVAIL:
+		return "no addresses";
+	case DH6OPT_STCODE_NOBINDING:
+		return "no binding";
+	case DH6OPT_STCODE_NOTONLINK:
+		return "not on-link";
+	case DH6OPT_STCODE_USEMULTICAST:
+		return "use multicast";
+	case DH6OPT_STCODE_NOPREFIXAVAIL:
+		return "no prefixes";
+	case DH6OPT_STCODE_UNKNOWNQUERYTYPE:
+		return "unknown query type";
+	case DH6OPT_STCODE_MALFORMEDQUERY:
+		return "malformed query";
+	case DH6OPT_STCODE_NOTCONFIGURED:
+		return "not configured";
+	case DH6OPT_STCODE_NOTALLOWED:
+		return "not allowed";
+	default:
+		snprintf(genstr, sizeof(genstr), "code%d", code);
+		return(genstr);
+	}
+}
+
+static void
+dhcp6opt_print(const u_char *cp, const u_char *ep)
+{
+	struct dhcp6opt *dh6o;
+	u_char *tp;
+	size_t i;
+	u_int16_t opttype;
+	size_t optlen;
+	u_int16_t val16;
+	u_int32_t val32;
+	struct dhcp6_ia ia;
+	struct dhcp6_ia_prefix ia_prefix;
+	struct dhcp6_ia_addr ia_addr;
+	struct dhcp6_auth authopt;
+	u_int authinfolen, authrealmlen;
+
+	if (cp == ep)
+		return;
+	while (cp < ep) {
+		if (ep < cp + sizeof(*dh6o))
+			goto trunc;
+		dh6o = (struct dhcp6opt *)cp;
+		optlen = EXTRACT_16BITS(&dh6o->dh6opt_len);
+		if (ep < cp + sizeof(*dh6o) + optlen)
+			goto trunc;
+		opttype = EXTRACT_16BITS(&dh6o->dh6opt_type);
+		printf(" (%s", dhcp6opt_name(opttype));
+		switch (opttype) {
+		case DH6OPT_CLIENTID:
+		case DH6OPT_SERVERID:
+			if (optlen < 2) {
+				/*(*/
+				printf(" ?)");
+				break;
+			}
+			tp = (u_char *)(dh6o + 1);
+			switch (EXTRACT_16BITS(tp)) {
+			case 1:
+				if (optlen >= 2 + 6) {
+					printf(" hwaddr/time type %u time %u ",
+					    EXTRACT_16BITS(&tp[2]),
+					    EXTRACT_32BITS(&tp[4]));
+					for (i = 8; i < optlen; i++)
+						printf("%02x", tp[i]);
+					/*(*/
+					printf(")");
+				} else {
+					/*(*/
+					printf(" ?)");
+				}
+				break;
+			case 2:
+				if (optlen >= 2 + 8) {
+					printf(" vid ");
+					for (i = 2; i < 2 + 8; i++)
+						printf("%02x", tp[i]);
+					/*(*/
+					printf(")");
+				} else {
+					/*(*/
+					printf(" ?)");
+				}
+				break;
+			case 3:
+				if (optlen >= 2 + 2) {
+					printf(" hwaddr type %u ",
+					    EXTRACT_16BITS(&tp[2]));
+					for (i = 4; i < optlen; i++)
+						printf("%02x", tp[i]);
+					/*(*/
+					printf(")");
+				} else {
+					/*(*/
+					printf(" ?)");
+				}
+				break;
+			default:
+				printf(" type %d)", EXTRACT_16BITS(tp));
+				break;
+			}
+			break;
+		case DH6OPT_IA_ADDR:
+			if (optlen < sizeof(ia_addr) - 4) {
+				printf(" ?)");
+				break;
+			}
+			memcpy(&ia_addr, (u_char *)dh6o, sizeof(ia_addr));
+			printf(" %s",
+			    ip6addr_string(&ia_addr.dh6opt_ia_addr_addr));
+			ia_addr.dh6opt_ia_addr_pltime =
+			    ntohl(ia_addr.dh6opt_ia_addr_pltime);
+			ia_addr.dh6opt_ia_addr_vltime =
+			    ntohl(ia_addr.dh6opt_ia_addr_vltime);
+			printf(" pltime:%lu vltime:%lu",
+			    (unsigned long)ia_addr.dh6opt_ia_addr_pltime,
+			    (unsigned long)ia_addr.dh6opt_ia_addr_vltime);
+			if (optlen > sizeof(ia_addr) - 4) {
+				/* there are sub-options */
+				dhcp6opt_print((u_char *)dh6o +
+				    sizeof(ia_addr),
+				    (u_char *)(dh6o + 1) + optlen);
+			}
+			printf(")");
+			break;
+		case DH6OPT_ORO:
+		case DH6OPT_ERO:
+			if (optlen % 2) {
+				printf(" ?)");
+				break;
+			}
+			tp = (u_char *)(dh6o + 1);
+			for (i = 0; i < optlen; i += 2) {
+				u_int16_t opt;
+
+				memcpy(&opt, &tp[i], sizeof(opt));
+				printf(" %s", dhcp6opt_name(ntohs(opt)));
+			}
+			printf(")");
+			break;
+		case DH6OPT_PREFERENCE:
+			if (optlen != 1) {
+				printf(" ?)");
+				break;
+			}
+			printf(" %d)", *((u_char *)(dh6o + 1) + 1));
+			break;
+		case DH6OPT_ELAPSED_TIME:
+			if (optlen != 2) {
+				printf(" ?)");
+				break;
+			}
+			memcpy(&val16, dh6o + 1, sizeof(val16));
+			val16 = ntohs(val16);
+			printf(" %d)", (int)val16);
+			break;
+		case DH6OPT_RELAY_MSG:
+			printf(" (");
+			dhcp6_print((const u_char *)(dh6o + 1), optlen);
+			printf(")");
+			break;
+		case DH6OPT_AUTH:
+			if (optlen < sizeof(authopt) - sizeof(*dh6o)) {
+				printf(" ?)");
+				break;
+			}
+			memcpy(&authopt, dh6o, sizeof(authopt));
+			switch (authopt.dh6opt_auth_proto) {
+			case DH6OPT_AUTHPROTO_DELAYED:
+				printf(" proto: delayed");
+				break;
+			case DH6OPT_AUTHPROTO_RECONFIG:
+				printf(" proto: reconfigure");
+				break;
+			default:
+				printf(" proto: %d",
+				    authopt.dh6opt_auth_proto);
+				break;
+			}
+			switch (authopt.dh6opt_auth_alg) {
+			case DH6OPT_AUTHALG_HMACMD5:
+				/* XXX: may depend on the protocol */
+				printf(", alg: HMAC-MD5");
+				break;
+			default:
+				printf(", alg: %d", authopt.dh6opt_auth_alg);
+				break;
+			}
+			switch (authopt.dh6opt_auth_rdm) {
+			case DH6OPT_AUTHRDM_MONOCOUNTER:
+				printf(", RDM: mono");
+				break;
+			default:
+				printf(", RDM: %d", authopt.dh6opt_auth_rdm);
+				break;
+			}
+			tp = (u_char *)&authopt.dh6opt_auth_rdinfo;
+			printf(", RD:");
+			for (i = 0; i < 4; i++, tp += sizeof(val16))
+				printf(" %04x", EXTRACT_16BITS(tp));
+
+			/* protocol dependent part */
+			tp = (u_char *)dh6o + sizeof(authopt);
+			authinfolen =
+			    optlen + sizeof(*dh6o) - sizeof(authopt); 
+			switch (authopt.dh6opt_auth_proto) {
+			case DH6OPT_AUTHPROTO_DELAYED:
+				if (authinfolen == 0)
+					break;
+				if (authinfolen < 20) {
+					printf(" ??");
+					break;
+				}
+				authrealmlen = authinfolen - 20;
+				if (authrealmlen > 0) {
+					printf(", realm: ");
+				}
+				for (i = 0; i < authrealmlen; i++, tp++)
+					printf("%02x", *tp);
+				printf(", key ID: %08x", EXTRACT_32BITS(tp));
+				tp += 4;
+				printf(", HMAC-MD5:");
+				for (i = 0; i < 4; i++, tp+= 4)
+					printf(" %08x", EXTRACT_32BITS(tp));
+				break;
+			case DH6OPT_AUTHPROTO_RECONFIG:
+				if (authinfolen != 17) {
+					printf(" ??");
+					break;
+				}
+				switch (*tp++) {
+				case DH6OPT_AUTHRECONFIG_KEY:
+					printf(" reconfig-key");
+					break;
+				case DH6OPT_AUTHRECONFIG_HMACMD5:
+					printf(" type: HMAC-MD5");
+					break;
+				default:
+					printf(" type: ??");
+					break;
+				}
+				printf(" value:");
+				for (i = 0; i < 4; i++, tp+= 4)
+					printf(" %08x", EXTRACT_32BITS(tp));
+				break;
+			default:
+				printf(" ??");
+				break;
+			}
+
+			printf(")");
+			break;
+		case DH6OPT_RAPID_COMMIT: /* nothing todo */
+			printf(")");
+			break;
+		case DH6OPT_INTERFACE_ID:
+		case DH6OPT_SUBSCRIBER_ID:
+			/*
+			 * Since we cannot predict the encoding, print hex dump
+			 * at most 10 characters.
+			 */
+			printf(" ");
+			for (i = 0; i < optlen && i < 10; i++)
+				printf("%02x", ((u_char *)(dh6o + 1))[i]);
+			printf("...)");
+			break;
+		case DH6OPT_RECONF_MSG:
+			tp = (u_char *)(dh6o + 1);
+			switch (*tp) {
+			case DH6_RENEW:
+				printf(" for renew)");
+				break;
+			case DH6_INFORM_REQ:
+				printf(" for inf-req)");
+				break;
+			default:
+				printf(" for ?\?\?(%02x))", *tp);
+				break;
+			}
+			break;
+		case DH6OPT_RECONF_ACCEPT: /* nothing todo */
+			printf(")");
+			break;
+		case DH6OPT_SIP_SERVER_A:
+		case DH6OPT_DNS:
+		case DH6OPT_NTP_SERVERS:
+		case DH6OPT_NIS_SERVERS:
+		case DH6OPT_NISP_SERVERS:
+		case DH6OPT_BCMCS_SERVER_A:
+		case DH6OPT_PANA_AGENT:
+		case DH6OPT_LQ_CLIENT_LINK:
+			if (optlen % 16) {
+				printf(" ?)");
+				break;
+			}
+			tp = (u_char *)(dh6o + 1);
+			for (i = 0; i < optlen; i += 16)
+				printf(" %s", ip6addr_string(&tp[i]));
+			printf(")");
+			break;
+		case DH6OPT_STATUS_CODE:
+			if (optlen < 2) {
+				printf(" ?)");
+				break;
+			}
+			memcpy(&val16, (u_char *)(dh6o + 1), sizeof(val16));
+			val16 = ntohs(val16);
+			printf(" %s)", dhcp6stcode(val16));
+			break;
+		case DH6OPT_IA_NA:
+		case DH6OPT_IA_PD:
+			if (optlen < sizeof(ia) - 4) {
+				printf(" ?)");
+				break;
+			}
+			memcpy(&ia, (u_char *)dh6o, sizeof(ia));
+			ia.dh6opt_ia_iaid = ntohl(ia.dh6opt_ia_iaid);
+			ia.dh6opt_ia_t1 = ntohl(ia.dh6opt_ia_t1);
+			ia.dh6opt_ia_t2 = ntohl(ia.dh6opt_ia_t2);
+			printf(" IAID:%lu T1:%lu T2:%lu",
+			    (unsigned long)ia.dh6opt_ia_iaid,
+			    (unsigned long)ia.dh6opt_ia_t1,
+			    (unsigned long)ia.dh6opt_ia_t2);
+			if (optlen > sizeof(ia) - 4) {
+				/* there are sub-options */
+				dhcp6opt_print((u_char *)dh6o + sizeof(ia),
+				    (u_char *)(dh6o + 1) + optlen);
+			}
+			printf(")");
+			break;
+		case DH6OPT_IA_TA:
+			if (optlen < 4) {
+				printf(" ?)");
+				break;
+			}
+			memcpy(&val32, dh6o + 1, sizeof(val32));
+			val32 = ntohl(val32);
+			printf(" IAID:%lu", (unsigned long)val32);
+			if (optlen > 4) {
+				/* there are sub-options */
+				dhcp6opt_print((u_char *)(dh6o + 1) + 4,
+				    (u_char *)(dh6o + 1) + optlen);
+			}
+			printf(")");
+			break;
+		case DH6OPT_IA_PD_PREFIX:
+			if (optlen < sizeof(ia_prefix) - 4) {
+				printf(" ?)");
+				break;
+			}
+			memcpy(&ia_prefix, (u_char *)dh6o, sizeof(ia_prefix));
+			printf(" %s/%d",
+			    ip6addr_string(&ia_prefix.dh6opt_ia_prefix_addr),
+			    ia_prefix.dh6opt_ia_prefix_plen);
+			ia_prefix.dh6opt_ia_prefix_pltime =
+			    ntohl(ia_prefix.dh6opt_ia_prefix_pltime);
+			ia_prefix.dh6opt_ia_prefix_vltime =
+			    ntohl(ia_prefix.dh6opt_ia_prefix_vltime);
+			printf(" pltime:%lu vltime:%lu",
+			    (unsigned long)ia_prefix.dh6opt_ia_prefix_pltime,
+			    (unsigned long)ia_prefix.dh6opt_ia_prefix_vltime);
+			if (optlen > sizeof(ia_prefix) - 4) {
+				/* there are sub-options */
+				dhcp6opt_print((u_char *)dh6o +
+				    sizeof(ia_prefix),
+				    (u_char *)(dh6o + 1) + optlen);
+			}
+			printf(")");
+			break;
+		case DH6OPT_LIFETIME:
+		case DH6OPT_CLT_TIME:
+			if (optlen != 4) {
+				printf(" ?)");
+				break;
+			}
+			memcpy(&val32, dh6o + 1, sizeof(val32));
+			val32 = ntohl(val32);
+			printf(" %d)", (int)val32);
+			break;
+		case DH6OPT_REMOTE_ID:
+			if (optlen < 4) {
+				printf(" ?)");
+				break;
+			}
+			tp = (u_char *)(dh6o + 1);
+			memcpy(&val32, &tp[0], sizeof(val32));
+			val32 = ntohl(val32);
+			printf(" %d ", (int)val32);
+			/*
+			 * Print hex dump first 10 characters.
+			 */
+			for (i = 4; i < optlen && i < 14; i++)
+				printf("%02x", tp[i]);
+			printf("...)");
+			break;
+		case DH6OPT_LQ_QUERY:
+			if (optlen < 17) {
+				printf(" ?)");
+				break;
+			}
+			tp = (u_char *)(dh6o + 1);
+			switch (*tp) {
+			case 1:
+				printf(" by-address");
+				break;
+			case 2:
+				printf(" by-clientID");
+				break;
+			default:
+				printf(" type_%d", (int)*tp);
+				break;
+			}
+			printf(" %s", ip6addr_string(&tp[1]));
+			if (optlen > 17) {
+				/* there are query-options */
+				dhcp6opt_print(tp + 17, tp + optlen);
+			}
+			printf(")");
+			break;
+		case DH6OPT_CLIENT_DATA:
+			if (optlen > 0) {
+				/* there are encapsulated options */
+				dhcp6opt_print((u_char *)(dh6o + 1),
+				    (u_char *)(dh6o + 1) + optlen);
+			}
+			printf(")");
+			break;
+		case DH6OPT_LQ_RELAY_DATA:
+			if (optlen < 16) {
+				printf(" ?)");
+				break;
+			}
+			tp = (u_char *)(dh6o + 1);
+			printf(" %s ", ip6addr_string(&tp[0]));
+			/*
+			 * Print hex dump first 10 characters.
+			 */
+			for (i = 16; i < optlen && i < 26; i++)
+				printf("%02x", tp[i]);
+			printf("...)");
+			break;
+		default:
+			printf(")");
+			break;
+		}
+
+		cp += sizeof(*dh6o) + optlen;
+	}
+	return;
+
+trunc:
+	printf("[|dhcp6ext]");
+}
+
+/*
+ * Print dhcp6 packets
+ */
+void
+dhcp6_print(const u_char *cp, u_int length)
+{
+	struct dhcp6 *dh6;
+	struct dhcp6_relay *dh6relay;
+	const u_char *ep;
+	u_char *extp;
+	const char *name;
+
+	printf("dhcp6");
+
+	ep = (u_char *)snapend;
+	if (cp + length < ep)
+		ep = cp + length;
+
+	dh6 = (struct dhcp6 *)cp;
+	dh6relay = (struct dhcp6_relay *)cp;
+	TCHECK(dh6->dh6_xid);
+	switch (dh6->dh6_msgtype) {
+	case DH6_SOLICIT:
+		name = "solicit";
+		break;
+	case DH6_ADVERTISE:
+		name = "advertise";
+		break;
+	case DH6_REQUEST:
+		name = "request";
+		break;
+	case DH6_CONFIRM:
+		name = "confirm";
+		break;
+	case DH6_RENEW:
+		name = "renew";
+		break;
+	case DH6_REBIND:
+		name = "rebind";
+		break;
+	case DH6_REPLY:
+		name = "reply";
+		break;
+	case DH6_RELEASE:
+		name = "release";
+		break;
+	case DH6_DECLINE:
+		name = "decline";
+		break;
+	case DH6_RECONFIGURE:
+		name = "reconfigure";
+		break;
+	case DH6_INFORM_REQ:
+		name= "inf-req";
+		break;
+	case DH6_RELAY_FORW:
+		name= "relay-fwd";
+		break;
+	case DH6_RELAY_REPLY:
+		name= "relay-reply";
+		break;
+	case DH6_LEASEQUERY:
+		name= "leasequery";
+		break;
+	case DH6_LQ_REPLY:
+		name= "leasequery-reply";
+		break;
+	default:
+		name = NULL;
+		break;
+	}
+
+	if (!vflag) {
+		if (name)
+			printf(" %s", name);
+		else if (dh6->dh6_msgtype != DH6_RELAY_FORW &&
+		    dh6->dh6_msgtype != DH6_RELAY_REPLY) {
+			printf(" msgtype-%u", dh6->dh6_msgtype);
+		}
+		return;
+	}
+
+	/* XXX relay agent messages have to be handled differently */
+
+	if (name)
+		printf(" %s (", name);	/*)*/
+	else
+		printf(" msgtype-%u (", dh6->dh6_msgtype);	/*)*/
+	if (dh6->dh6_msgtype != DH6_RELAY_FORW &&
+	    dh6->dh6_msgtype != DH6_RELAY_REPLY) {
+		printf("xid=%x", EXTRACT_32BITS(&dh6->dh6_xid) & DH6_XIDMASK);
+		extp = (u_char *)(dh6 + 1);
+		dhcp6opt_print(extp, ep);
+	} else {		/* relay messages */
+		struct in6_addr addr6;
+
+		TCHECK(dh6relay->dh6relay_peeraddr);
+
+		memcpy(&addr6, dh6relay->dh6relay_linkaddr, sizeof (addr6));
+		printf("linkaddr=%s", ip6addr_string(&addr6));
+
+		memcpy(&addr6, dh6relay->dh6relay_peeraddr, sizeof (addr6));
+		printf(" peeraddr=%s", ip6addr_string(&addr6));
+
+		dhcp6opt_print((u_char *)(dh6relay + 1), ep);
+	}
+	/*(*/
+	printf(")");
+	return;
+
+trunc:
+	printf("[|dhcp6]");
+}