f49c5d523a
MFC after: 1 month
811 lines
22 KiB
C
811 lines
22 KiB
C
/*
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* Copyright (C) 1998 and 1999 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* RFC3315: DHCPv6
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* supported DHCPv6 options:
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* RFC3319: Session Initiation Protocol (SIP) Servers options,
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* RFC3633: IPv6 Prefix options,
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* RFC3646: DNS Configuration options,
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* RFC3898: Network Information Service (NIS) Configuration options,
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* RFC4075: Simple Network Time Protocol (SNTP) Configuration option,
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* RFC4242: Information Refresh Time option,
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* RFC4280: Broadcast and Multicast Control Servers options,
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* RFC5908: Network Time Protocol (NTP) Server Option for DHCPv6
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* RFC6334: Dual-Stack Lite option,
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*/
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#define NETDISSECT_REWORKED
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <tcpdump-stdinc.h>
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#include <stdio.h>
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#include <string.h>
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#include "interface.h"
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#include "addrtoname.h"
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#include "extract.h"
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/* lease duration */
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#define DHCP6_DURATION_INFINITE 0xffffffff
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/* Error Values */
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#define DH6ERR_FAILURE 16
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#define DH6ERR_AUTHFAIL 17
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#define DH6ERR_POORLYFORMED 18
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#define DH6ERR_UNAVAIL 19
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#define DH6ERR_OPTUNAVAIL 20
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/* Message type */
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#define DH6_SOLICIT 1
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#define DH6_ADVERTISE 2
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#define DH6_REQUEST 3
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#define DH6_CONFIRM 4
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#define DH6_RENEW 5
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#define DH6_REBIND 6
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#define DH6_REPLY 7
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#define DH6_RELEASE 8
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#define DH6_DECLINE 9
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#define DH6_RECONFIGURE 10
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#define DH6_INFORM_REQ 11
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#define DH6_RELAY_FORW 12
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#define DH6_RELAY_REPLY 13
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#define DH6_LEASEQUERY 14
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#define DH6_LQ_REPLY 15
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static const struct tok dh6_msgtype_str[] = {
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{ DH6_SOLICIT, "solicit" },
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{ DH6_ADVERTISE, "advertise" },
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{ DH6_REQUEST, "request" },
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{ DH6_CONFIRM, "confirm" },
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{ DH6_RENEW, "renew" },
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{ DH6_REBIND, "rebind" },
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{ DH6_REPLY, "reply" },
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{ DH6_RELEASE, "release" },
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{ DH6_DECLINE, "decline" },
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{ DH6_RECONFIGURE, "reconfigure" },
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{ DH6_INFORM_REQ, "inf-req" },
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{ DH6_RELAY_FORW, "relay-fwd" },
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{ DH6_RELAY_REPLY, "relay-reply" },
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{ DH6_LEASEQUERY, "leasequery" },
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{ DH6_LQ_REPLY, "leasequery-reply" },
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{ 0, NULL }
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};
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/* DHCP6 base packet format */
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struct dhcp6 {
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union {
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uint8_t m;
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uint32_t x;
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} dh6_msgtypexid;
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/* options follow */
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};
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#define dh6_msgtype dh6_msgtypexid.m
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#define dh6_xid dh6_msgtypexid.x
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#define DH6_XIDMASK 0x00ffffff
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/* DHCPv6 relay messages */
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struct dhcp6_relay {
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uint8_t dh6relay_msgtype;
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uint8_t dh6relay_hcnt;
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uint8_t dh6relay_linkaddr[16]; /* XXX: badly aligned */
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uint8_t dh6relay_peeraddr[16];
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/* options follow */
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};
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/* options */
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#define DH6OPT_CLIENTID 1
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#define DH6OPT_SERVERID 2
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#define DH6OPT_IA_NA 3
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#define DH6OPT_IA_TA 4
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#define DH6OPT_IA_ADDR 5
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#define DH6OPT_ORO 6
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#define DH6OPT_PREFERENCE 7
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# define DH6OPT_PREF_MAX 255
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#define DH6OPT_ELAPSED_TIME 8
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#define DH6OPT_RELAY_MSG 9
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/*#define DH6OPT_SERVER_MSG 10 deprecated */
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#define DH6OPT_AUTH 11
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# define DH6OPT_AUTHPROTO_DELAYED 2
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# define DH6OPT_AUTHPROTO_RECONFIG 3
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# define DH6OPT_AUTHALG_HMACMD5 1
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# define DH6OPT_AUTHRDM_MONOCOUNTER 0
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# define DH6OPT_AUTHRECONFIG_KEY 1
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# define DH6OPT_AUTHRECONFIG_HMACMD5 2
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#define DH6OPT_UNICAST 12
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#define DH6OPT_STATUS_CODE 13
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# define DH6OPT_STCODE_SUCCESS 0
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# define DH6OPT_STCODE_UNSPECFAIL 1
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# define DH6OPT_STCODE_NOADDRAVAIL 2
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# define DH6OPT_STCODE_NOBINDING 3
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# define DH6OPT_STCODE_NOTONLINK 4
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# define DH6OPT_STCODE_USEMULTICAST 5
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# define DH6OPT_STCODE_NOPREFIXAVAIL 6
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# define DH6OPT_STCODE_UNKNOWNQUERYTYPE 7
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# define DH6OPT_STCODE_MALFORMEDQUERY 8
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# define DH6OPT_STCODE_NOTCONFIGURED 9
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# define DH6OPT_STCODE_NOTALLOWED 10
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#define DH6OPT_RAPID_COMMIT 14
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#define DH6OPT_USER_CLASS 15
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#define DH6OPT_VENDOR_CLASS 16
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#define DH6OPT_VENDOR_OPTS 17
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#define DH6OPT_INTERFACE_ID 18
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#define DH6OPT_RECONF_MSG 19
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#define DH6OPT_RECONF_ACCEPT 20
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#define DH6OPT_SIP_SERVER_D 21
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#define DH6OPT_SIP_SERVER_A 22
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#define DH6OPT_DNS_SERVERS 23
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#define DH6OPT_DOMAIN_LIST 24
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#define DH6OPT_IA_PD 25
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#define DH6OPT_IA_PD_PREFIX 26
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#define DH6OPT_NIS_SERVERS 27
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#define DH6OPT_NISP_SERVERS 28
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#define DH6OPT_NIS_NAME 29
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#define DH6OPT_NISP_NAME 30
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#define DH6OPT_SNTP_SERVERS 31
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#define DH6OPT_LIFETIME 32
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#define DH6OPT_BCMCS_SERVER_D 33
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#define DH6OPT_BCMCS_SERVER_A 34
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#define DH6OPT_GEOCONF_CIVIC 36
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#define DH6OPT_REMOTE_ID 37
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#define DH6OPT_SUBSCRIBER_ID 38
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#define DH6OPT_CLIENT_FQDN 39
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#define DH6OPT_PANA_AGENT 40
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#define DH6OPT_NEW_POSIX_TIMEZONE 41
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#define DH6OPT_NEW_TZDB_TIMEZONE 42
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#define DH6OPT_ERO 43
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#define DH6OPT_LQ_QUERY 44
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#define DH6OPT_CLIENT_DATA 45
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#define DH6OPT_CLT_TIME 46
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#define DH6OPT_LQ_RELAY_DATA 47
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#define DH6OPT_LQ_CLIENT_LINK 48
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#define DH6OPT_NTP_SERVER 56
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# define DH6OPT_NTP_SUBOPTION_SRV_ADDR 1
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# define DH6OPT_NTP_SUBOPTION_MC_ADDR 2
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# define DH6OPT_NTP_SUBOPTION_SRV_FQDN 3
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#define DH6OPT_AFTR_NAME 64
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static const struct tok dh6opt_str[] = {
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{ DH6OPT_CLIENTID, "client-ID" },
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{ DH6OPT_SERVERID, "server-ID" },
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{ DH6OPT_IA_NA, "IA_NA" },
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{ DH6OPT_IA_TA, "IA_TA" },
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{ DH6OPT_IA_ADDR, "IA_ADDR" },
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{ DH6OPT_ORO, "option-request" },
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{ DH6OPT_PREFERENCE, "preference" },
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{ DH6OPT_ELAPSED_TIME, "elapsed-time" },
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{ DH6OPT_RELAY_MSG, "relay-message" },
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{ DH6OPT_AUTH, "authentication" },
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{ DH6OPT_UNICAST, "server-unicast" },
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{ DH6OPT_STATUS_CODE, "status-code" },
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{ DH6OPT_RAPID_COMMIT, "rapid-commit" },
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{ DH6OPT_USER_CLASS, "user-class" },
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{ DH6OPT_VENDOR_CLASS, "vendor-class" },
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{ DH6OPT_VENDOR_OPTS, "vendor-specific-info" },
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{ DH6OPT_INTERFACE_ID, "interface-ID" },
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{ DH6OPT_RECONF_MSG, "reconfigure-message" },
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{ DH6OPT_RECONF_ACCEPT, "reconfigure-accept" },
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{ DH6OPT_SIP_SERVER_D, "SIP-servers-domain" },
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{ DH6OPT_SIP_SERVER_A, "SIP-servers-address" },
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{ DH6OPT_DNS_SERVERS, "DNS-server" },
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{ DH6OPT_DOMAIN_LIST, "DNS-search-list" },
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{ DH6OPT_IA_PD, "IA_PD" },
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{ DH6OPT_IA_PD_PREFIX, "IA_PD-prefix" },
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{ DH6OPT_SNTP_SERVERS, "SNTP-servers" },
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{ DH6OPT_LIFETIME, "lifetime" },
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{ DH6OPT_NIS_SERVERS, "NIS-server" },
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{ DH6OPT_NISP_SERVERS, "NIS+-server" },
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{ DH6OPT_NIS_NAME, "NIS-domain-name" },
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{ DH6OPT_NISP_NAME, "NIS+-domain-name" },
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{ DH6OPT_BCMCS_SERVER_D, "BCMCS-domain-name" },
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{ DH6OPT_BCMCS_SERVER_A, "BCMCS-server" },
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{ DH6OPT_GEOCONF_CIVIC, "Geoconf-Civic" },
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{ DH6OPT_REMOTE_ID, "Remote-ID" },
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{ DH6OPT_SUBSCRIBER_ID, "Subscriber-ID" },
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{ DH6OPT_CLIENT_FQDN, "Client-FQDN" },
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{ DH6OPT_PANA_AGENT, "PANA-agent" },
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{ DH6OPT_NEW_POSIX_TIMEZONE, "POSIX-timezone" },
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{ DH6OPT_NEW_TZDB_TIMEZONE, "POSIX-tz-database" },
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{ DH6OPT_ERO, "Echo-request-option" },
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{ DH6OPT_LQ_QUERY, "Lease-query" },
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{ DH6OPT_CLIENT_DATA, "LQ-client-data" },
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{ DH6OPT_CLT_TIME, "Clt-time" },
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{ DH6OPT_LQ_RELAY_DATA, "LQ-relay-data" },
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{ DH6OPT_LQ_CLIENT_LINK, "LQ-client-link" },
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{ DH6OPT_NTP_SERVER, "NTP-server" },
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{ DH6OPT_AFTR_NAME, "AFTR-Name" },
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{ 0, NULL }
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};
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static const struct tok dh6opt_stcode_str[] = {
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{ DH6OPT_STCODE_SUCCESS, "success" },
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{ DH6OPT_STCODE_UNSPECFAIL, "unspec failure" },
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{ DH6OPT_STCODE_NOADDRAVAIL, "no addresses" },
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{ DH6OPT_STCODE_NOBINDING, "no binding" },
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{ DH6OPT_STCODE_NOTONLINK, "not on-link" },
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{ DH6OPT_STCODE_USEMULTICAST, "use multicast" },
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{ DH6OPT_STCODE_NOPREFIXAVAIL, "no prefixes" },
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{ DH6OPT_STCODE_UNKNOWNQUERYTYPE, "unknown query type" },
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{ DH6OPT_STCODE_MALFORMEDQUERY, "malformed query" },
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{ DH6OPT_STCODE_NOTCONFIGURED, "not configured" },
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{ DH6OPT_STCODE_NOTALLOWED, "not allowed" },
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{ 0, NULL }
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};
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struct dhcp6opt {
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uint16_t dh6opt_type;
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uint16_t dh6opt_len;
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/* type-dependent data follows */
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};
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static const char *
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dhcp6stcode(const uint16_t code)
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{
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return code > 255 ? "INVALID code" : tok2str(dh6opt_stcode_str, "code%u", code);
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}
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static void
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dhcp6opt_print(netdissect_options *ndo,
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const u_char *cp, const u_char *ep)
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{
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const struct dhcp6opt *dh6o;
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const u_char *tp;
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size_t i;
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uint16_t opttype;
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size_t optlen;
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uint8_t auth_proto;
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u_int authinfolen, authrealmlen;
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int remain_len; /* Length of remaining options */
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int label_len; /* Label length */
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uint16_t subopt_code;
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uint16_t subopt_len;
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if (cp == ep)
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return;
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while (cp < ep) {
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if (ep < cp + sizeof(*dh6o))
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goto trunc;
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dh6o = (struct dhcp6opt *)cp;
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ND_TCHECK(*dh6o);
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optlen = EXTRACT_16BITS(&dh6o->dh6opt_len);
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if (ep < cp + sizeof(*dh6o) + optlen)
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goto trunc;
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opttype = EXTRACT_16BITS(&dh6o->dh6opt_type);
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ND_PRINT((ndo, " (%s", tok2str(dh6opt_str, "opt_%u", opttype)));
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switch (opttype) {
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case DH6OPT_CLIENTID:
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case DH6OPT_SERVERID:
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if (optlen < 2) {
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/*(*/
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ND_PRINT((ndo, " ?)"));
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break;
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}
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tp = (u_char *)(dh6o + 1);
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switch (EXTRACT_16BITS(tp)) {
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case 1:
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if (optlen >= 2 + 6) {
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ND_PRINT((ndo, " hwaddr/time type %u time %u ",
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EXTRACT_16BITS(&tp[2]),
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EXTRACT_32BITS(&tp[4])));
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for (i = 8; i < optlen; i++)
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ND_PRINT((ndo, "%02x", tp[i]));
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/*(*/
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ND_PRINT((ndo, ")"));
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} else {
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/*(*/
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ND_PRINT((ndo, " ?)"));
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}
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break;
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case 2:
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if (optlen >= 2 + 8) {
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ND_PRINT((ndo, " vid "));
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for (i = 2; i < 2 + 8; i++)
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ND_PRINT((ndo, "%02x", tp[i]));
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/*(*/
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ND_PRINT((ndo, ")"));
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} else {
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/*(*/
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ND_PRINT((ndo, " ?)"));
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}
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break;
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case 3:
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if (optlen >= 2 + 2) {
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ND_PRINT((ndo, " hwaddr type %u ",
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EXTRACT_16BITS(&tp[2])));
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for (i = 4; i < optlen; i++)
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ND_PRINT((ndo, "%02x", tp[i]));
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/*(*/
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ND_PRINT((ndo, ")"));
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} else {
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/*(*/
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ND_PRINT((ndo, " ?)"));
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}
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break;
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default:
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ND_PRINT((ndo, " type %d)", EXTRACT_16BITS(tp)));
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break;
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}
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break;
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case DH6OPT_IA_ADDR:
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if (optlen < 24) {
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/*(*/
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ND_PRINT((ndo, " ?)"));
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break;
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}
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tp = (u_char *)(dh6o + 1);
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ND_PRINT((ndo, " %s", ip6addr_string(ndo, &tp[0])));
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ND_PRINT((ndo, " pltime:%u vltime:%u",
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EXTRACT_32BITS(&tp[16]),
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EXTRACT_32BITS(&tp[20])));
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if (optlen > 24) {
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/* there are sub-options */
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dhcp6opt_print(ndo, tp + 24, tp + optlen);
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}
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ND_PRINT((ndo, ")"));
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break;
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case DH6OPT_ORO:
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case DH6OPT_ERO:
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if (optlen % 2) {
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ND_PRINT((ndo, " ?)"));
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break;
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}
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tp = (u_char *)(dh6o + 1);
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for (i = 0; i < optlen; i += 2) {
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ND_PRINT((ndo, " %s",
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tok2str(dh6opt_str, "opt_%u", EXTRACT_16BITS(&tp[i]))));
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}
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ND_PRINT((ndo, ")"));
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break;
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case DH6OPT_PREFERENCE:
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if (optlen != 1) {
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ND_PRINT((ndo, " ?)"));
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break;
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}
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tp = (u_char *)(dh6o + 1);
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ND_PRINT((ndo, " %d)", *tp));
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break;
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case DH6OPT_ELAPSED_TIME:
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if (optlen != 2) {
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ND_PRINT((ndo, " ?)"));
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break;
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}
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tp = (u_char *)(dh6o + 1);
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ND_PRINT((ndo, " %d)", EXTRACT_16BITS(tp)));
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break;
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case DH6OPT_RELAY_MSG:
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ND_PRINT((ndo, " ("));
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tp = (u_char *)(dh6o + 1);
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dhcp6_print(ndo, tp, optlen);
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ND_PRINT((ndo, ")"));
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break;
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case DH6OPT_AUTH:
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if (optlen < 11) {
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ND_PRINT((ndo, " ?)"));
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break;
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}
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tp = (u_char *)(dh6o + 1);
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auth_proto = *tp;
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switch (auth_proto) {
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case DH6OPT_AUTHPROTO_DELAYED:
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ND_PRINT((ndo, " proto: delayed"));
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break;
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case DH6OPT_AUTHPROTO_RECONFIG:
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ND_PRINT((ndo, " proto: reconfigure"));
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break;
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default:
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ND_PRINT((ndo, " proto: %d", auth_proto));
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break;
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}
|
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tp++;
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switch (*tp) {
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case DH6OPT_AUTHALG_HMACMD5:
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/* XXX: may depend on the protocol */
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ND_PRINT((ndo, ", alg: HMAC-MD5"));
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break;
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default:
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ND_PRINT((ndo, ", alg: %d", *tp));
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break;
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}
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tp++;
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switch (*tp) {
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case DH6OPT_AUTHRDM_MONOCOUNTER:
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ND_PRINT((ndo, ", RDM: mono"));
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break;
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default:
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ND_PRINT((ndo, ", RDM: %d", *tp));
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break;
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}
|
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tp++;
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ND_PRINT((ndo, ", RD:"));
|
|
for (i = 0; i < 4; i++, tp += 2)
|
|
ND_PRINT((ndo, " %04x", EXTRACT_16BITS(tp)));
|
|
|
|
/* protocol dependent part */
|
|
authinfolen = optlen - 11;
|
|
switch (auth_proto) {
|
|
case DH6OPT_AUTHPROTO_DELAYED:
|
|
if (authinfolen == 0)
|
|
break;
|
|
if (authinfolen < 20) {
|
|
ND_PRINT((ndo, " ??"));
|
|
break;
|
|
}
|
|
authrealmlen = authinfolen - 20;
|
|
if (authrealmlen > 0) {
|
|
ND_PRINT((ndo, ", realm: "));
|
|
}
|
|
for (i = 0; i < authrealmlen; i++, tp++)
|
|
ND_PRINT((ndo, "%02x", *tp));
|
|
ND_PRINT((ndo, ", key ID: %08x", EXTRACT_32BITS(tp)));
|
|
tp += 4;
|
|
ND_PRINT((ndo, ", HMAC-MD5:"));
|
|
for (i = 0; i < 4; i++, tp+= 4)
|
|
ND_PRINT((ndo, " %08x", EXTRACT_32BITS(tp)));
|
|
break;
|
|
case DH6OPT_AUTHPROTO_RECONFIG:
|
|
if (authinfolen != 17) {
|
|
ND_PRINT((ndo, " ??"));
|
|
break;
|
|
}
|
|
switch (*tp++) {
|
|
case DH6OPT_AUTHRECONFIG_KEY:
|
|
ND_PRINT((ndo, " reconfig-key"));
|
|
break;
|
|
case DH6OPT_AUTHRECONFIG_HMACMD5:
|
|
ND_PRINT((ndo, " type: HMAC-MD5"));
|
|
break;
|
|
default:
|
|
ND_PRINT((ndo, " type: ??"));
|
|
break;
|
|
}
|
|
ND_PRINT((ndo, " value:"));
|
|
for (i = 0; i < 4; i++, tp+= 4)
|
|
ND_PRINT((ndo, " %08x", EXTRACT_32BITS(tp)));
|
|
break;
|
|
default:
|
|
ND_PRINT((ndo, " ??"));
|
|
break;
|
|
}
|
|
|
|
ND_PRINT((ndo, ")"));
|
|
break;
|
|
case DH6OPT_RAPID_COMMIT: /* nothing todo */
|
|
ND_PRINT((ndo, ")"));
|
|
break;
|
|
case DH6OPT_INTERFACE_ID:
|
|
case DH6OPT_SUBSCRIBER_ID:
|
|
/*
|
|
* Since we cannot predict the encoding, print hex dump
|
|
* at most 10 characters.
|
|
*/
|
|
tp = (u_char *)(dh6o + 1);
|
|
ND_PRINT((ndo, " "));
|
|
for (i = 0; i < optlen && i < 10; i++)
|
|
ND_PRINT((ndo, "%02x", tp[i]));
|
|
ND_PRINT((ndo, "...)"));
|
|
break;
|
|
case DH6OPT_RECONF_MSG:
|
|
tp = (u_char *)(dh6o + 1);
|
|
switch (*tp) {
|
|
case DH6_RENEW:
|
|
ND_PRINT((ndo, " for renew)"));
|
|
break;
|
|
case DH6_INFORM_REQ:
|
|
ND_PRINT((ndo, " for inf-req)"));
|
|
break;
|
|
default:
|
|
ND_PRINT((ndo, " for ?\?\?(%02x))", *tp));
|
|
break;
|
|
}
|
|
break;
|
|
case DH6OPT_RECONF_ACCEPT: /* nothing todo */
|
|
ND_PRINT((ndo, ")"));
|
|
break;
|
|
case DH6OPT_SIP_SERVER_A:
|
|
case DH6OPT_DNS_SERVERS:
|
|
case DH6OPT_SNTP_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) {
|
|
ND_PRINT((ndo, " ?)"));
|
|
break;
|
|
}
|
|
tp = (u_char *)(dh6o + 1);
|
|
for (i = 0; i < optlen; i += 16)
|
|
ND_PRINT((ndo, " %s", ip6addr_string(ndo, &tp[i])));
|
|
ND_PRINT((ndo, ")"));
|
|
break;
|
|
case DH6OPT_SIP_SERVER_D:
|
|
case DH6OPT_DOMAIN_LIST:
|
|
tp = (u_char *)(dh6o + 1);
|
|
while (tp < cp + sizeof(*dh6o) + optlen) {
|
|
ND_PRINT((ndo, " "));
|
|
if ((tp = ns_nprint(ndo, tp, cp + sizeof(*dh6o) + optlen)) == NULL)
|
|
goto trunc;
|
|
}
|
|
ND_PRINT((ndo, ")"));
|
|
break;
|
|
case DH6OPT_STATUS_CODE:
|
|
if (optlen < 2) {
|
|
ND_PRINT((ndo, " ?)"));
|
|
break;
|
|
}
|
|
tp = (u_char *)(dh6o + 1);
|
|
ND_PRINT((ndo, " %s)", dhcp6stcode(EXTRACT_16BITS(&tp[0]))));
|
|
break;
|
|
case DH6OPT_IA_NA:
|
|
case DH6OPT_IA_PD:
|
|
if (optlen < 12) {
|
|
ND_PRINT((ndo, " ?)"));
|
|
break;
|
|
}
|
|
tp = (u_char *)(dh6o + 1);
|
|
ND_PRINT((ndo, " IAID:%u T1:%u T2:%u",
|
|
EXTRACT_32BITS(&tp[0]),
|
|
EXTRACT_32BITS(&tp[4]),
|
|
EXTRACT_32BITS(&tp[8])));
|
|
if (optlen > 12) {
|
|
/* there are sub-options */
|
|
dhcp6opt_print(ndo, tp + 12, tp + optlen);
|
|
}
|
|
ND_PRINT((ndo, ")"));
|
|
break;
|
|
case DH6OPT_IA_TA:
|
|
if (optlen < 4) {
|
|
ND_PRINT((ndo, " ?)"));
|
|
break;
|
|
}
|
|
tp = (u_char *)(dh6o + 1);
|
|
ND_PRINT((ndo, " IAID:%u", EXTRACT_32BITS(tp)));
|
|
if (optlen > 4) {
|
|
/* there are sub-options */
|
|
dhcp6opt_print(ndo, tp + 4, tp + optlen);
|
|
}
|
|
ND_PRINT((ndo, ")"));
|
|
break;
|
|
case DH6OPT_IA_PD_PREFIX:
|
|
if (optlen < 25) {
|
|
ND_PRINT((ndo, " ?)"));
|
|
break;
|
|
}
|
|
tp = (u_char *)(dh6o + 1);
|
|
ND_PRINT((ndo, " %s/%d", ip6addr_string(ndo, &tp[9]), tp[8]));
|
|
ND_PRINT((ndo, " pltime:%u vltime:%u",
|
|
EXTRACT_32BITS(&tp[0]),
|
|
EXTRACT_32BITS(&tp[4])));
|
|
if (optlen > 25) {
|
|
/* there are sub-options */
|
|
dhcp6opt_print(ndo, tp + 25, tp + optlen);
|
|
}
|
|
ND_PRINT((ndo, ")"));
|
|
break;
|
|
case DH6OPT_LIFETIME:
|
|
case DH6OPT_CLT_TIME:
|
|
if (optlen != 4) {
|
|
ND_PRINT((ndo, " ?)"));
|
|
break;
|
|
}
|
|
tp = (u_char *)(dh6o + 1);
|
|
ND_PRINT((ndo, " %d)", EXTRACT_32BITS(tp)));
|
|
break;
|
|
case DH6OPT_REMOTE_ID:
|
|
if (optlen < 4) {
|
|
ND_PRINT((ndo, " ?)"));
|
|
break;
|
|
}
|
|
tp = (u_char *)(dh6o + 1);
|
|
ND_PRINT((ndo, " %d ", EXTRACT_32BITS(tp)));
|
|
/*
|
|
* Print hex dump first 10 characters.
|
|
*/
|
|
for (i = 4; i < optlen && i < 14; i++)
|
|
ND_PRINT((ndo, "%02x", tp[i]));
|
|
ND_PRINT((ndo, "...)"));
|
|
break;
|
|
case DH6OPT_LQ_QUERY:
|
|
if (optlen < 17) {
|
|
ND_PRINT((ndo, " ?)"));
|
|
break;
|
|
}
|
|
tp = (u_char *)(dh6o + 1);
|
|
switch (*tp) {
|
|
case 1:
|
|
ND_PRINT((ndo, " by-address"));
|
|
break;
|
|
case 2:
|
|
ND_PRINT((ndo, " by-clientID"));
|
|
break;
|
|
default:
|
|
ND_PRINT((ndo, " type_%d", (int)*tp));
|
|
break;
|
|
}
|
|
ND_PRINT((ndo, " %s", ip6addr_string(ndo, &tp[1])));
|
|
if (optlen > 17) {
|
|
/* there are query-options */
|
|
dhcp6opt_print(ndo, tp + 17, tp + optlen);
|
|
}
|
|
ND_PRINT((ndo, ")"));
|
|
break;
|
|
case DH6OPT_CLIENT_DATA:
|
|
tp = (u_char *)(dh6o + 1);
|
|
if (optlen > 0) {
|
|
/* there are encapsulated options */
|
|
dhcp6opt_print(ndo, tp, tp + optlen);
|
|
}
|
|
ND_PRINT((ndo, ")"));
|
|
break;
|
|
case DH6OPT_LQ_RELAY_DATA:
|
|
if (optlen < 16) {
|
|
ND_PRINT((ndo, " ?)"));
|
|
break;
|
|
}
|
|
tp = (u_char *)(dh6o + 1);
|
|
ND_PRINT((ndo, " %s ", ip6addr_string(ndo, &tp[0])));
|
|
/*
|
|
* Print hex dump first 10 characters.
|
|
*/
|
|
for (i = 16; i < optlen && i < 26; i++)
|
|
ND_PRINT((ndo, "%02x", tp[i]));
|
|
ND_PRINT((ndo, "...)"));
|
|
break;
|
|
case DH6OPT_NTP_SERVER:
|
|
if (optlen < 4) {
|
|
ND_PRINT((ndo, " ?)"));
|
|
break;
|
|
}
|
|
tp = (u_char *)(dh6o + 1);
|
|
while (tp < cp + sizeof(*dh6o) + optlen - 4) {
|
|
subopt_code = EXTRACT_16BITS(tp);
|
|
tp += 2;
|
|
subopt_len = EXTRACT_16BITS(tp);
|
|
tp += 2;
|
|
if (tp + subopt_len > cp + sizeof(*dh6o) + optlen)
|
|
goto trunc;
|
|
ND_PRINT((ndo, " subopt:%d", subopt_code));
|
|
switch (subopt_code) {
|
|
case DH6OPT_NTP_SUBOPTION_SRV_ADDR:
|
|
case DH6OPT_NTP_SUBOPTION_MC_ADDR:
|
|
if (subopt_len != 16) {
|
|
ND_PRINT((ndo, " ?"));
|
|
break;
|
|
}
|
|
ND_PRINT((ndo, " %s", ip6addr_string(ndo, &tp[0])));
|
|
break;
|
|
case DH6OPT_NTP_SUBOPTION_SRV_FQDN:
|
|
ND_PRINT((ndo, " "));
|
|
if (ns_nprint(ndo, tp, tp + subopt_len) == NULL)
|
|
goto trunc;
|
|
break;
|
|
default:
|
|
ND_PRINT((ndo, " ?"));
|
|
break;
|
|
}
|
|
tp += subopt_len;
|
|
}
|
|
ND_PRINT((ndo, ")"));
|
|
break;
|
|
case DH6OPT_AFTR_NAME:
|
|
if (optlen < 3) {
|
|
ND_PRINT((ndo, " ?)"));
|
|
break;
|
|
}
|
|
tp = (u_char *)(dh6o + 1);
|
|
remain_len = optlen;
|
|
ND_PRINT((ndo, " "));
|
|
/* Encoding is described in section 3.1 of RFC 1035 */
|
|
while (remain_len && *tp) {
|
|
label_len = *tp++;
|
|
if (label_len < remain_len - 1) {
|
|
ND_PRINT((ndo, "%.*s", label_len, tp));
|
|
tp += label_len;
|
|
remain_len -= (label_len + 1);
|
|
if(*tp) ND_PRINT((ndo, "."));
|
|
} else {
|
|
ND_PRINT((ndo, " ?"));
|
|
break;
|
|
}
|
|
}
|
|
ND_PRINT((ndo, ")"));
|
|
break;
|
|
default:
|
|
ND_PRINT((ndo, ")"));
|
|
break;
|
|
}
|
|
|
|
cp += sizeof(*dh6o) + optlen;
|
|
}
|
|
return;
|
|
|
|
trunc:
|
|
ND_PRINT((ndo, "[|dhcp6ext]"));
|
|
}
|
|
|
|
/*
|
|
* Print dhcp6 packets
|
|
*/
|
|
void
|
|
dhcp6_print(netdissect_options *ndo,
|
|
const u_char *cp, u_int length)
|
|
{
|
|
struct dhcp6 *dh6;
|
|
struct dhcp6_relay *dh6relay;
|
|
const u_char *ep;
|
|
u_char *extp;
|
|
const char *name;
|
|
|
|
ND_PRINT((ndo, "dhcp6"));
|
|
|
|
ep = (u_char *)ndo->ndo_snapend;
|
|
if (cp + length < ep)
|
|
ep = cp + length;
|
|
|
|
dh6 = (struct dhcp6 *)cp;
|
|
dh6relay = (struct dhcp6_relay *)cp;
|
|
ND_TCHECK(dh6->dh6_xid);
|
|
name = tok2str(dh6_msgtype_str, "msgtype-%u", dh6->dh6_msgtype);
|
|
|
|
if (!ndo->ndo_vflag) {
|
|
ND_PRINT((ndo, " %s", name));
|
|
return;
|
|
}
|
|
|
|
/* XXX relay agent messages have to be handled differently */
|
|
|
|
ND_PRINT((ndo, " %s (", name)); /*)*/
|
|
if (dh6->dh6_msgtype != DH6_RELAY_FORW &&
|
|
dh6->dh6_msgtype != DH6_RELAY_REPLY) {
|
|
ND_PRINT((ndo, "xid=%x", EXTRACT_32BITS(&dh6->dh6_xid) & DH6_XIDMASK));
|
|
extp = (u_char *)(dh6 + 1);
|
|
dhcp6opt_print(ndo, extp, ep);
|
|
} else { /* relay messages */
|
|
struct in6_addr addr6;
|
|
|
|
ND_TCHECK(dh6relay->dh6relay_peeraddr);
|
|
|
|
memcpy(&addr6, dh6relay->dh6relay_linkaddr, sizeof (addr6));
|
|
ND_PRINT((ndo, "linkaddr=%s", ip6addr_string(ndo, &addr6)));
|
|
|
|
memcpy(&addr6, dh6relay->dh6relay_peeraddr, sizeof (addr6));
|
|
ND_PRINT((ndo, " peeraddr=%s", ip6addr_string(ndo, &addr6)));
|
|
|
|
dhcp6opt_print(ndo, (u_char *)(dh6relay + 1), ep);
|
|
}
|
|
/*(*/
|
|
ND_PRINT((ndo, ")"));
|
|
return;
|
|
|
|
trunc:
|
|
ND_PRINT((ndo, "[|dhcp6]"));
|
|
}
|