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tcpdump/print-dhcp6.c
guy 3fa6ec70c3 From Shinsuke Suzuki: 
Some of the options in print-dhcp6.c are declared as
"unassigned ones". but it is no longer true due to an
IETF standardization activities.

Here's the patch to catch up with the latest IANA
assignment, including an removal of the old Prefix-
Delegation option used in the NTT-communications.
(AFAIK they no longer uses this old option).
2006-10-25 22:02:36 +00:00

774 lines
18 KiB
C
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/*
* 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 2006-10-25 22:02:36 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
/* 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_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
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";
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";
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:
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:
/*
* Since we cannot predict the encoding, print hex dump
* at most 10 characters.
*/
for (i = 0; i < optlen && i < 10; i++)
printf("%02x", ((u_char *)(dh6o + 1))[i]);
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:
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_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:
if (optlen != 4) {
printf(" ?)");
break;
}
memcpy(&val32, dh6o + 1, sizeof(val32));
val32 = ntohl(val32);
printf(" %d)", (int)val32);
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;
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]");
}
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