![Guy Harris](/assets/img/avatar_default.png)
byte - and a length of 1 is used to put the message digest into the protocol tree, which agrees with that. Therefore, "tvb_get_guint8()" should be used to fetch it. svn path=/trunk/; revision=11746
1177 lines
34 KiB
C
1177 lines
34 KiB
C
/* packet-dhcpfo.c
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* Routines for ISC DHCP Server failover protocol dissection
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* Copyright 2004, M. Ortega y Strupp <moys@loplof.de>
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*
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* $Id$
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/*
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* This implementation is loosely based on draft-ietf-dhc-failover-07.txt.
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* As this document does not represent the actual implementation, the
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* source code of ISC DHCPD 3.0 was used too.
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*
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* See also
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*
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* http://community.roxen.com/developers/idocs/drafts/draft-ietf-dhc-failover-10.html
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*
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* upon which the handling of the message-digest option is based.
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*/
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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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <glib.h>
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#include <epan/packet.h>
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#include <prefs.h>
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#include "packet-arp.h"
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#define TCP_PORT_DHCPFO 519
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static unsigned int tcp_port_pref = TCP_PORT_DHCPFO;
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static dissector_handle_t dhcpfo_handle;
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/* Initialize the protocol and registered fields */
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static int proto_dhcpfo = -1;
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static int hf_dhcpfo_length = -1;
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static int hf_dhcpfo_type = -1;
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static int hf_dhcpfo_poffset = -1;
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static int hf_dhcpfo_time = -1;
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static int hf_dhcpfo_xid = -1;
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static int hf_dhcpfo_additional_HB = -1;
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static int hf_dhcpfo_payload_data = -1;
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static int hf_dhcpfo_option_code = -1;
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static int hf_dhcpfo_dhcp_style_option = -1;
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static int hf_dhcpfo_option_length = -1;
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static int hf_dhcpfo_binding_status = -1;
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static int hf_dhcpfo_server_state = -1;
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static int hf_dhcpfo_assigned_ip_address = -1;
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static int hf_dhcpfo_sending_server_ip_address = -1;
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static int hf_dhcpfo_addresses_transfered = -1;
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static int hf_dhcpfo_client_identifier = -1;
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static int hf_dhcpfo_client_hw_type = -1;
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static int hf_dhcpfo_client_hardware_address = -1;
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static int hf_dhcpfo_ftddns = -1;
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static int hf_dhcpfo_reject_reason = -1;
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static int hf_dhcpfo_message = -1;
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static int hf_dhcpfo_mclt = -1;
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static int hf_dhcpfo_vendor_class = -1;
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static int hf_dhcpfo_lease_expiration_time = -1;
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static int hf_dhcpfo_grace_expiration_time = -1;
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static int hf_dhcpfo_potential_expiration_time = -1;
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static int hf_dhcpfo_client_last_transaction_time = -1;
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static int hf_dhcpfo_start_time_of_state = -1;
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static int hf_dhcpfo_vendor_option = -1;
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static int hf_dhcpfo_max_unacked_bndupd = -1;
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static int hf_dhcpfo_protocol_version = -1;
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static int hf_dhcpfo_receive_timer = -1;
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static int hf_dhcpfo_message_digest = -1;
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static int hf_dhcpfo_hash_bucket_assignment = -1;
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/* Initialize the subtree pointers */
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static gint ett_dhcpfo = -1;
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static gint ett_fo_payload = -1;
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static gint ett_fo_option = -1;
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/* structure for payload data */
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struct payloadMessage {
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struct payloadMessage *next;
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int opcode;
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int length;
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/*guint data;*/
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int actualpoffset;
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};
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struct payloadMessage *liste;
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/* message-types of failover */
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enum {
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DHCP_FO_RESERVED,
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DHCP_FO_POOLREQ,
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DHCP_FO_POOLRESP,
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DHCP_FO_BNDUPD,
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DHCP_FO_BNDACK,
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DHCP_FO_CONNECT,
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DHCP_FO_CONNECTACK,
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DHCP_FO_UPDREQ,
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DHCP_FO_UPDDONE,
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DHCP_FO_UPDREQALL,
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DHCP_FO_STATE,
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DHCP_FO_CONTACT,
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DHCP_FO_DISCONNECT
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};
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static const value_string failover_vals[] =
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{
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{DHCP_FO_RESERVED, "Reserved"},
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{DHCP_FO_POOLREQ, "Pool request"},
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{DHCP_FO_POOLRESP, "Pool response"},
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{DHCP_FO_BNDUPD, "Binding update"},
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{DHCP_FO_BNDACK, "Binding acknowledge"},
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{DHCP_FO_CONNECT, "Connect"},
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{DHCP_FO_CONNECTACK, "Connect acknowledge"},
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{DHCP_FO_UPDREQ, "Update request all"},
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{DHCP_FO_UPDDONE, "Update done"},
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{DHCP_FO_UPDREQALL, "Update request"},
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{DHCP_FO_STATE, "State"},
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{DHCP_FO_CONTACT, "Contact"},
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{DHCP_FO_DISCONNECT, "Disconnect"},
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{0, NULL}
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};
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/*options of payload-data*/
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enum {
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DHCP_FO_PD_UNKNOWN_PACKET0,
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DHCP_FO_PD_BINDING_STATUS,
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DHCP_FO_PD_ASSIGNED_IP_ADDRESS,
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DHCP_FO_PD_SENDING_SERVER_IP_ADDRESS,
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DHCP_FO_PD_ADDRESSES_TRANSFERED,
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DHCP_FO_PD_CLIENT_IDENTIFIER,
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DHCP_FO_PD_CLIENT_HARDWARE_ADDRESS,
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DHCP_FO_PD_FTDDNS,
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DHCP_FO_PD_REJECT_REASON,
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DHCP_FO_PD_MESSAGE,
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DHCP_FO_PD_MCLT,
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DHCP_FO_PD_VENDOR_CLASS,
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DHCP_FO_PD_UNKNOWN_PACKET12,
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DHCP_FO_PD_LEASE_EXPIRATION_TIME,
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DHCP_FO_PD_POTENTIAL_EXPIRATION_TIME,
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DHCP_FO_PD_GRACE_EXPIRATION_TIME,
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DHCP_FO_PD_CLIENT_LAST_TRANSACTION_TIME,
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DHCP_FO_PD_START_TIME_OF_STATE,
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DHCP_FO_PD_SERVERSTATE,
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DHCP_FO_PD_SERVERFLAG,
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DHCP_FO_PD_VENDOR_OPTION,
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DHCP_FO_PD_MAX_UNACKED_BNDUPD,
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DHCP_FO_PD_UNKNOWN_PACKET22,
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DHCP_FO_PD_RECEIVE_TIMER,
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DHCP_FO_PD_HASH_BUCKET_ASSIGNMENT,
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DHCP_FO_PD_MESSAGE_DIGEST,
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DHCP_FO_PD_PROTOCOL_VERSION,
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DHCP_FO_PD_TLS_REQUEST,
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DHCP_FO_PD_TLS_REPLY,
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DHCP_FO_PD_REQUEST_OPTION,
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DHCP_FO_PD_REPLY_OPTION
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};
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static const value_string option_code_vals[] =
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{
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{DHCP_FO_PD_UNKNOWN_PACKET0, "Unknown Packet"},
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{DHCP_FO_PD_BINDING_STATUS, "binding-status"},
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{DHCP_FO_PD_ASSIGNED_IP_ADDRESS, "assigned-IP-address"},
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{DHCP_FO_PD_SENDING_SERVER_IP_ADDRESS, "sending-server-IP-address"},
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{DHCP_FO_PD_ADDRESSES_TRANSFERED, "addresses-transfered"},
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{DHCP_FO_PD_CLIENT_IDENTIFIER, "client-identifier"},
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{DHCP_FO_PD_CLIENT_HARDWARE_ADDRESS, "client-hardware-address"},
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{DHCP_FO_PD_FTDDNS, "FTDDNS"},
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{DHCP_FO_PD_REJECT_REASON, "reject-reason"},
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{DHCP_FO_PD_MESSAGE, "message"},
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{DHCP_FO_PD_MCLT, "MCLT"},
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{DHCP_FO_PD_VENDOR_CLASS, "vendor-class"},
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{DHCP_FO_PD_UNKNOWN_PACKET12, "Unknown Packet"},
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{DHCP_FO_PD_LEASE_EXPIRATION_TIME, "lease-expiration-time"},
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{DHCP_FO_PD_POTENTIAL_EXPIRATION_TIME, "potential-expiration-time"},
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{DHCP_FO_PD_GRACE_EXPIRATION_TIME, "grace-expiration-time"},
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{DHCP_FO_PD_CLIENT_LAST_TRANSACTION_TIME, "client-last-transaction-time"},
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{DHCP_FO_PD_START_TIME_OF_STATE, "start-time-of-state"},
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{DHCP_FO_PD_SERVERSTATE, "server-state"},
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{DHCP_FO_PD_SERVERFLAG, "server-flag"},
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{DHCP_FO_PD_VENDOR_OPTION, "vendor-option"},
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{DHCP_FO_PD_MAX_UNACKED_BNDUPD, "max-unacked-BNDUPD"},
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{DHCP_FO_PD_UNKNOWN_PACKET22, "Unknown Packet"},
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{DHCP_FO_PD_RECEIVE_TIMER, "receive-timer"},
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{DHCP_FO_PD_HASH_BUCKET_ASSIGNMENT, "hash-bucket-assignment"},
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{DHCP_FO_PD_MESSAGE_DIGEST, "message-digest"},
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{DHCP_FO_PD_PROTOCOL_VERSION, "protocol-version"},
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{DHCP_FO_PD_TLS_REQUEST, "TLS-request"},
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{DHCP_FO_PD_TLS_REPLY, "TLS-reply"},
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{DHCP_FO_PD_REQUEST_OPTION, "request-option"},
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{DHCP_FO_PD_REPLY_OPTION, "reply-option"},
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{0, NULL}
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};
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/* Binding-status */
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enum {
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DHCP_FO_BS_UNKNOWN_PACKET,
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DHCP_FO_BS_FREE,
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DHCP_FO_BS_ACTIVE,
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DHCP_FO_BS_EXPIRED,
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DHCP_FO_BS_RELEASED,
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DHCP_FO_BS_ABANDONED,
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DHCP_FO_BS_RESET,
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DHCP_FO_BS_BACKUP
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};
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static const value_string binding_status_vals[] =
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{
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{DHCP_FO_BS_UNKNOWN_PACKET, "Unknown Packet"},
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{DHCP_FO_BS_FREE, "FREE"},
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{DHCP_FO_BS_ACTIVE, "ACTIVE"},
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{DHCP_FO_BS_EXPIRED, "EXPIRED"},
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{DHCP_FO_BS_RELEASED, "RELEASED"},
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{DHCP_FO_BS_ABANDONED, "ABANDONED"},
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{DHCP_FO_BS_RESET, "RESET"},
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{DHCP_FO_BS_BACKUP, "BACKUP"},
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{0, NULL}
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};
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/* Server-status */
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enum {
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DHCP_FO_SS_UNKNOWN_PACKET,
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DHCP_FO_SS_PARTNER_DOWN,
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DHCP_FO_SS_NORMAL,
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DHCP_FO_SS_COMMUNICATION_INTERRUPTED,
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DHCP_FO_SS_RESOLUTION_INTERRUPTED,
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DHCP_FO_SS_POTENTIAL_CONFLICT,
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DHCP_FO_SS_RECOVER,
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DHCP_FO_SS_RECOVER_DONE,
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DHCP_FO_SS_SHUTDOWN,
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DHCP_FO_SS_PAUSED,
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DHCP_FO_SS_STARTUP,
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DHCP_FO_SS_RECOVER_WAIT
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};
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static const value_string server_state_vals[] =
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{
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{DHCP_FO_SS_UNKNOWN_PACKET, "Unknown Packet"},
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{DHCP_FO_SS_PARTNER_DOWN, "partner down"},
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{DHCP_FO_SS_NORMAL, "normal"},
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{DHCP_FO_SS_COMMUNICATION_INTERRUPTED, "communication interrupted"},
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{DHCP_FO_SS_RESOLUTION_INTERRUPTED, "resolution interrupted"},
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{DHCP_FO_SS_POTENTIAL_CONFLICT, "potential conflict"},
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{DHCP_FO_SS_RECOVER, "recover"},
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{DHCP_FO_SS_RECOVER_DONE, "recover done"},
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{DHCP_FO_SS_SHUTDOWN, "shutdown"},
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{DHCP_FO_SS_PAUSED, "paused"},
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{DHCP_FO_SS_STARTUP, "startup"},
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{DHCP_FO_SS_RECOVER_WAIT, "recover wait"},
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{0, NULL}
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};
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/* reject reasons */
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enum {
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DHCP_FO_RR_0,
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DHCP_FO_RR_1,
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DHCP_FO_RR_2,
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DHCP_FO_RR_3,
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DHCP_FO_RR_4,
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DHCP_FO_RR_5,
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DHCP_FO_RR_6,
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DHCP_FO_RR_7,
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DHCP_FO_RR_8,
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DHCP_FO_RR_9,
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DHCP_FO_RR_10,
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DHCP_FO_RR_11,
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DHCP_FO_RR_12,
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DHCP_FO_RR_13,
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DHCP_FO_RR_14,
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DHCP_FO_RR_15,
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DHCP_FO_RR_16,
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DHCP_FO_RR_17,
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DHCP_FO_RR_18,
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DHCP_FO_RR_19,
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DHCP_FO_RR_254 = 254
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};
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static const value_string reject_reason_vals[] =
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{
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{DHCP_FO_RR_0, "Reserved"},
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{DHCP_FO_RR_1, "Illegal IP address (not part of any address pool)"},
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{DHCP_FO_RR_2, "Fatal conflict exists: address in use by other client"},
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{DHCP_FO_RR_3, "Missing binding information"},
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{DHCP_FO_RR_4, "Connection rejected, time mismatch too great"},
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{DHCP_FO_RR_5, "Connection rejected, invalid MCLT"},
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{DHCP_FO_RR_6, "Connection rejected, unknown reason"},
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{DHCP_FO_RR_7, "Connection rejected, duplicate connection"},
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{DHCP_FO_RR_8, "Connection rejected, invalid failover partner"},
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{DHCP_FO_RR_9, "TLS not supported"},
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{DHCP_FO_RR_10, "TLS supported but not configured"},
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{DHCP_FO_RR_11, "TLS required but not supported by partner"},
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{DHCP_FO_RR_12, "Message digest not supported"},
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{DHCP_FO_RR_13, "Message digest not configured"},
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{DHCP_FO_RR_14, "Protocol version mismatch"},
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{DHCP_FO_RR_15, "Missing binding information"},
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{DHCP_FO_RR_16, "Outdated binding information"},
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{DHCP_FO_RR_17, "Less critical binding information"},
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{DHCP_FO_RR_18, "No traffic within sufficient time"},
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{DHCP_FO_RR_19, "Hash bucket assignment conflict"},
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{DHCP_FO_RR_254, "Unknown: Error occurred but does not match any reason"},
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{0, NULL}
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};
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/* Code to actually dissect the packets */
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static void
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dissect_dhcpfo(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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/* Set up structures needed to add the protocol subtree and manage it */
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proto_item *ti, *pi, *oi, *receive_timer_item;
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proto_tree *dhcpfo_tree, *payload_tree, *option_tree;
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guint16 length, tls_request;
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guint type, serverflag;
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guint poffset;
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guint32 xid;
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gchar *typestrval, *optionstrval, *tls_request_string;
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guint32 time, lease_expiration_time, grace_expiration_time;
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guint32 potential_expiration_time, client_last_transaction_time;
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guint32 start_time_of_state;
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enum DHCPFOBoolean { false, true } additionalHB, more_payload;
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guint additionalHBlength;
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struct payloadMessage *helpliste;
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int actualoffset;
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guint8 htype, reject_reason, message_digest_type;
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const guint8 *chaddr;
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guint8 binding_status;
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gchar *binding_status_str, *reject_reason_str;
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gchar *assigned_ip_address_str, *sending_server_ip_address_str;
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guint32 addresses_transfered;
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const guint8 *client_identifier_str, *vendor_class_str;
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gchar *htype_str, *chaddr_str;
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gchar *lease_expiration_time_str;
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gchar *grace_expiration_time_str, *potential_expiration_time_str;
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gchar *client_last_transaction_time_str, *start_time_of_state_str;
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gchar *server_state_str;
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guint32 mclt;
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guint8 server_state, protocol_version;
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guint32 max_unacked_bndupd, receive_timer;
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/* Make entries in Protocol column and Info column on summary display */
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if (check_col(pinfo->cinfo, COL_PROTOCOL))
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "DHCPFO");
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length = tvb_get_ntohs(tvb, 0);
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type = tvb_get_guint8(tvb, 2);
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typestrval= match_strval(type,failover_vals);
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if (typestrval==NULL) {
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typestrval="Unknown Packet";
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}
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poffset = tvb_get_guint8(tvb, 3);
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if(poffset > 12)
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{
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additionalHB = true;
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additionalHBlength = poffset-12;
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}
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else
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{
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additionalHB = false;
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additionalHBlength = 0;
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}
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xid = tvb_get_ntohl(tvb, 8);
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if (check_col(pinfo->cinfo, COL_INFO)){
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col_add_fstr(pinfo->cinfo,
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COL_INFO,"%s xid: %x", typestrval,xid);
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}
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actualoffset = poffset;
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liste = NULL;
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/* payload-data */
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if(length-poffset != 0)
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{
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more_payload = true;
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/*liste->next = NULL;*/
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liste = (struct payloadMessage*)g_malloc(sizeof(struct payloadMessage));
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helpliste = liste;
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actualoffset = poffset;
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while(more_payload == true)
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{
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helpliste->opcode = tvb_get_ntohs(tvb, actualoffset);
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helpliste->length = tvb_get_ntohs(tvb, actualoffset+2);
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helpliste->next = NULL;
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helpliste->actualpoffset = actualoffset;
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actualoffset = actualoffset + helpliste->length + 4;
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if(actualoffset>=length)
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{
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more_payload = false;
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}
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else
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{
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helpliste->next = (struct payloadMessage*)g_malloc(sizeof(struct payloadMessage));
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}
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helpliste = helpliste->next;
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}
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}
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if (tree) {
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/* create display subtree for the protocol */
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ti = proto_tree_add_item(tree, proto_dhcpfo, tvb, 0, -1, FALSE);
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|
dhcpfo_tree = proto_item_add_subtree(ti, ett_dhcpfo);
|
|
|
|
proto_tree_add_item(dhcpfo_tree,
|
|
hf_dhcpfo_length, tvb, 0, 2, FALSE);
|
|
|
|
proto_tree_add_item(dhcpfo_tree,
|
|
hf_dhcpfo_type, tvb, 2, 1, FALSE);
|
|
|
|
proto_tree_add_item(dhcpfo_tree,
|
|
hf_dhcpfo_poffset, tvb, 3, 1, FALSE);
|
|
|
|
time = tvb_get_ntohl(tvb, 4);
|
|
proto_tree_add_uint_format(dhcpfo_tree, hf_dhcpfo_time, tvb, 4, 4,time,"%s", abs_time_secs_to_str(time));
|
|
|
|
|
|
proto_tree_add_item(dhcpfo_tree,
|
|
hf_dhcpfo_xid, tvb, 8, 4, FALSE);
|
|
|
|
/* if there are any additional header bytes */
|
|
if(additionalHB==true)
|
|
{
|
|
proto_tree_add_item(dhcpfo_tree,
|
|
hf_dhcpfo_additional_HB, tvb, 12, additionalHBlength, FALSE);
|
|
}
|
|
|
|
|
|
if(length-poffset != 0)
|
|
{
|
|
|
|
/* create display subtree for the protocol */
|
|
pi = proto_tree_add_item(dhcpfo_tree, hf_dhcpfo_payload_data, tvb, poffset, length-poffset, FALSE);
|
|
payload_tree = proto_item_add_subtree(pi, ett_fo_payload);
|
|
|
|
|
|
|
|
helpliste = liste;
|
|
while(helpliste!=NULL)
|
|
{
|
|
oi = proto_tree_add_item(payload_tree, hf_dhcpfo_dhcp_style_option, tvb, helpliste->actualpoffset, helpliste->length+4, FALSE);
|
|
option_tree = proto_item_add_subtree(oi, ett_fo_option);
|
|
|
|
/*** DHCP-Style-Options ****/
|
|
|
|
optionstrval= match_strval(helpliste->opcode,option_code_vals);
|
|
if (optionstrval==NULL) {
|
|
optionstrval="Unknown Packet";
|
|
}
|
|
|
|
|
|
proto_item_append_text(oi, ", %s (%d)",
|
|
optionstrval, helpliste->opcode);
|
|
|
|
proto_tree_add_item(option_tree,
|
|
hf_dhcpfo_option_code, tvb,
|
|
helpliste->actualpoffset, 2, FALSE);
|
|
|
|
|
|
proto_tree_add_item(option_tree,
|
|
hf_dhcpfo_option_length, tvb,
|
|
helpliste->actualpoffset+2, 2, FALSE);
|
|
|
|
|
|
/** opcode dependent format **/
|
|
|
|
switch(helpliste->opcode){
|
|
|
|
case DHCP_FO_PD_BINDING_STATUS:
|
|
|
|
binding_status = tvb_get_guint8(tvb,
|
|
helpliste->actualpoffset+4);
|
|
binding_status_str =
|
|
match_strval(binding_status,
|
|
binding_status_vals);
|
|
if(binding_status_str == NULL)
|
|
{
|
|
binding_status_str = "Unknown Packet";
|
|
}
|
|
proto_item_append_text(oi, ", %s (%d)",
|
|
binding_status_str,
|
|
binding_status);
|
|
|
|
proto_tree_add_item(option_tree,
|
|
hf_dhcpfo_binding_status, tvb,
|
|
helpliste->actualpoffset + 4, 1, FALSE);
|
|
break;
|
|
|
|
case DHCP_FO_PD_ASSIGNED_IP_ADDRESS:
|
|
|
|
assigned_ip_address_str = ip_to_str(
|
|
tvb_get_ptr(tvb,
|
|
helpliste->actualpoffset+4,
|
|
helpliste->length));
|
|
|
|
proto_item_append_text(oi, ", %s ",
|
|
assigned_ip_address_str);
|
|
|
|
proto_tree_add_item(option_tree,
|
|
hf_dhcpfo_assigned_ip_address, tvb,
|
|
helpliste->actualpoffset + 4,
|
|
helpliste->length , FALSE);
|
|
break;
|
|
|
|
case DHCP_FO_PD_SENDING_SERVER_IP_ADDRESS:
|
|
|
|
sending_server_ip_address_str = ip_to_str(tvb_get_ptr(tvb,helpliste->actualpoffset+4,helpliste->length));
|
|
|
|
proto_item_append_text(oi, ", %s ",
|
|
sending_server_ip_address_str);
|
|
proto_tree_add_item(option_tree,
|
|
hf_dhcpfo_sending_server_ip_address, tvb,
|
|
helpliste->actualpoffset + 4,
|
|
helpliste->length , FALSE);
|
|
break;
|
|
|
|
case DHCP_FO_PD_ADDRESSES_TRANSFERED:
|
|
|
|
addresses_transfered = tvb_get_ntohl(tvb,
|
|
helpliste->actualpoffset+4);
|
|
|
|
proto_item_append_text(oi,", %d",addresses_transfered);
|
|
proto_tree_add_item(option_tree,
|
|
hf_dhcpfo_addresses_transfered, tvb,
|
|
helpliste->actualpoffset + 4,
|
|
helpliste->length , FALSE);
|
|
break;
|
|
|
|
case DHCP_FO_PD_CLIENT_IDENTIFIER:
|
|
|
|
client_identifier_str = tvb_get_ptr(tvb,
|
|
helpliste->actualpoffset+4,
|
|
helpliste->length);
|
|
proto_item_append_text(oi,", \"%s\"",client_identifier_str);
|
|
proto_tree_add_item(option_tree,
|
|
hf_dhcpfo_client_identifier, tvb,
|
|
helpliste->actualpoffset + 4,
|
|
helpliste->length , FALSE);
|
|
break;
|
|
|
|
case DHCP_FO_PD_CLIENT_HARDWARE_ADDRESS:
|
|
|
|
htype = tvb_get_guint8(tvb,helpliste->actualpoffset+4);
|
|
chaddr = tvb_get_ptr(tvb, helpliste->actualpoffset+5,
|
|
helpliste->length-1);
|
|
htype_str = arphrdtype_to_str(htype, "Unknown (0x%02x)");
|
|
chaddr_str = arphrdaddr_to_str(tvb_get_ptr(tvb,
|
|
helpliste->actualpoffset+5, 6),6,htype);
|
|
|
|
proto_item_append_text(oi, ", %s, %s",
|
|
htype_str, chaddr_str);
|
|
|
|
proto_tree_add_text(option_tree, tvb,
|
|
helpliste->actualpoffset+4, 1,
|
|
"Hardware type: %s",
|
|
htype_str);
|
|
|
|
proto_tree_add_text(option_tree, tvb,
|
|
helpliste->actualpoffset+5, 6,
|
|
"Client hardware address: %s",
|
|
chaddr_str);
|
|
break;
|
|
|
|
case DHCP_FO_PD_FTDDNS:
|
|
|
|
proto_tree_add_item(option_tree,
|
|
hf_dhcpfo_ftddns, tvb,
|
|
helpliste->actualpoffset + 4,
|
|
helpliste->length , FALSE);
|
|
break;
|
|
|
|
case DHCP_FO_PD_REJECT_REASON:
|
|
|
|
reject_reason = tvb_get_guint8(tvb,
|
|
helpliste->actualpoffset +4);
|
|
reject_reason_str = match_strval(reject_reason,
|
|
reject_reason_vals);
|
|
if (reject_reason_str==NULL) {
|
|
reject_reason_str="Unknown Packet";
|
|
}
|
|
|
|
proto_item_append_text(oi, ", %s (%d)",
|
|
reject_reason_str,
|
|
reject_reason);
|
|
|
|
proto_tree_add_item(option_tree,
|
|
hf_dhcpfo_reject_reason, tvb,
|
|
helpliste->actualpoffset +4,
|
|
helpliste->length, FALSE);
|
|
break;
|
|
|
|
case DHCP_FO_PD_MESSAGE:
|
|
|
|
proto_tree_add_item(option_tree,
|
|
hf_dhcpfo_message, tvb,
|
|
helpliste->actualpoffset + 4,
|
|
helpliste->length , FALSE);
|
|
break;
|
|
|
|
case DHCP_FO_PD_MCLT:
|
|
|
|
mclt = tvb_get_ntohl(tvb, helpliste->actualpoffset+4);
|
|
proto_item_append_text(oi,", %d seconds",mclt);
|
|
proto_tree_add_item(option_tree,
|
|
hf_dhcpfo_mclt, tvb,
|
|
helpliste->actualpoffset +4,
|
|
helpliste->length, FALSE);
|
|
break;
|
|
|
|
case DHCP_FO_PD_VENDOR_CLASS:
|
|
|
|
vendor_class_str = tvb_get_ptr(tvb,
|
|
helpliste->actualpoffset+4,helpliste->length);
|
|
proto_item_append_text(oi,", \"%s\"",vendor_class_str);
|
|
proto_tree_add_item(option_tree,
|
|
hf_dhcpfo_vendor_class, tvb,
|
|
helpliste->actualpoffset +4,
|
|
helpliste->length, FALSE);
|
|
break;
|
|
|
|
case DHCP_FO_PD_LEASE_EXPIRATION_TIME:
|
|
|
|
lease_expiration_time = tvb_get_ntohl(tvb,
|
|
helpliste->actualpoffset+4);
|
|
lease_expiration_time_str =
|
|
abs_time_secs_to_str(lease_expiration_time);
|
|
|
|
proto_item_append_text(oi, ", %s",
|
|
lease_expiration_time_str);
|
|
|
|
proto_tree_add_uint_format(option_tree,
|
|
hf_dhcpfo_lease_expiration_time, tvb,
|
|
helpliste->actualpoffset +4,
|
|
helpliste->length,
|
|
lease_expiration_time,
|
|
"Lease expiration time: %s",
|
|
lease_expiration_time_str);
|
|
break;
|
|
|
|
case DHCP_FO_PD_POTENTIAL_EXPIRATION_TIME:
|
|
|
|
potential_expiration_time = tvb_get_ntohl(tvb,
|
|
helpliste->actualpoffset+4);
|
|
|
|
potential_expiration_time_str =
|
|
abs_time_secs_to_str(potential_expiration_time);
|
|
|
|
proto_item_append_text(oi, ", %s",
|
|
potential_expiration_time_str);
|
|
|
|
proto_tree_add_uint_format(option_tree,
|
|
hf_dhcpfo_potential_expiration_time, tvb,
|
|
helpliste->actualpoffset +4,
|
|
helpliste->length,
|
|
potential_expiration_time,
|
|
"Potential expiration time: %s",
|
|
potential_expiration_time_str);
|
|
break;
|
|
|
|
case DHCP_FO_PD_GRACE_EXPIRATION_TIME:
|
|
|
|
grace_expiration_time = tvb_get_ntohl(tvb,
|
|
helpliste->actualpoffset+4);
|
|
|
|
grace_expiration_time_str =
|
|
abs_time_secs_to_str(grace_expiration_time);
|
|
|
|
proto_item_append_text(oi, ", %s",
|
|
grace_expiration_time_str);
|
|
|
|
proto_tree_add_uint_format(option_tree,
|
|
hf_dhcpfo_grace_expiration_time, tvb,
|
|
helpliste->actualpoffset +4,
|
|
helpliste->length,
|
|
grace_expiration_time,
|
|
"Grace expiration time: %s",
|
|
grace_expiration_time_str);
|
|
|
|
break;
|
|
|
|
case DHCP_FO_PD_CLIENT_LAST_TRANSACTION_TIME:
|
|
|
|
client_last_transaction_time = tvb_get_ntohl(tvb,
|
|
helpliste->actualpoffset+4);
|
|
client_last_transaction_time_str =
|
|
abs_time_secs_to_str(client_last_transaction_time);
|
|
|
|
proto_item_append_text(oi, ", %s",
|
|
client_last_transaction_time_str);
|
|
|
|
proto_tree_add_uint_format(option_tree,
|
|
hf_dhcpfo_client_last_transaction_time, tvb,
|
|
helpliste->actualpoffset +4,
|
|
helpliste->length,
|
|
client_last_transaction_time,
|
|
"Last transaction time: %s", abs_time_secs_to_str(client_last_transaction_time));
|
|
break;
|
|
|
|
case DHCP_FO_PD_START_TIME_OF_STATE:
|
|
start_time_of_state = tvb_get_ntohl(tvb,
|
|
helpliste->actualpoffset+4);
|
|
start_time_of_state_str =
|
|
abs_time_secs_to_str(start_time_of_state);
|
|
|
|
proto_item_append_text(oi, ", %s",
|
|
start_time_of_state_str);
|
|
|
|
proto_tree_add_uint_format(option_tree,
|
|
hf_dhcpfo_start_time_of_state, tvb,
|
|
helpliste->actualpoffset +4,
|
|
helpliste->length,
|
|
start_time_of_state,
|
|
"Start time of state: %s", abs_time_secs_to_str(start_time_of_state));
|
|
break;
|
|
|
|
case DHCP_FO_PD_SERVERSTATE:
|
|
|
|
server_state = tvb_get_guint8(tvb, helpliste->actualpoffset+4);
|
|
|
|
server_state_str = match_strval(server_state,server_state_vals);
|
|
if (server_state_str==NULL) {
|
|
server_state_str="Unknown Packet";
|
|
}
|
|
proto_item_append_text(oi, ", %s (%d)",
|
|
server_state_str, server_state);
|
|
|
|
proto_tree_add_item(option_tree,
|
|
hf_dhcpfo_server_state, tvb,
|
|
helpliste->actualpoffset + 4, 1, FALSE);
|
|
break;
|
|
|
|
case DHCP_FO_PD_SERVERFLAG:
|
|
|
|
serverflag = tvb_get_guint8(tvb,
|
|
helpliste->actualpoffset+4);
|
|
|
|
if(serverflag == 1)
|
|
{
|
|
proto_item_append_text(oi, ", STARTUP (1)");
|
|
proto_tree_add_text(option_tree,tvb,
|
|
helpliste->actualpoffset +4,
|
|
helpliste->length,
|
|
"Serverflag: STARTUP");
|
|
|
|
}
|
|
else if(serverflag == 0)
|
|
{
|
|
proto_item_append_text(oi, ", NONE (%d)",
|
|
serverflag);
|
|
proto_tree_add_text(option_tree,tvb,
|
|
helpliste->actualpoffset +4,
|
|
helpliste->length,
|
|
"Serverflag: NONE");
|
|
}
|
|
else
|
|
{
|
|
proto_item_append_text(oi,
|
|
"UNKNOWN FLAGS (%d)", serverflag);
|
|
|
|
proto_tree_add_text(option_tree,tvb,
|
|
helpliste->actualpoffset +4,
|
|
helpliste->length,
|
|
"Serverflag: UNKNOWN FLAGS");
|
|
}
|
|
break;
|
|
|
|
case DHCP_FO_PD_VENDOR_OPTION:
|
|
|
|
proto_tree_add_item(option_tree,
|
|
hf_dhcpfo_vendor_option, tvb,
|
|
helpliste->actualpoffset + 4,
|
|
helpliste->length , FALSE);
|
|
|
|
break;
|
|
|
|
case DHCP_FO_PD_MAX_UNACKED_BNDUPD:
|
|
|
|
max_unacked_bndupd =
|
|
tvb_get_ntohl(tvb,helpliste->actualpoffset+4);
|
|
proto_item_append_text(oi,", %d", max_unacked_bndupd);
|
|
|
|
proto_tree_add_item(option_tree,
|
|
hf_dhcpfo_max_unacked_bndupd, tvb,
|
|
helpliste->actualpoffset + 4,
|
|
helpliste->length , FALSE);
|
|
break;
|
|
|
|
case DHCP_FO_PD_RECEIVE_TIMER:
|
|
|
|
receive_timer =
|
|
tvb_get_ntohl(tvb,helpliste->actualpoffset+4);
|
|
proto_item_append_text(oi,", %d seconds", receive_timer);
|
|
|
|
receive_timer_item = proto_tree_add_item(option_tree,
|
|
hf_dhcpfo_receive_timer, tvb,
|
|
helpliste->actualpoffset + 4,
|
|
helpliste->length , FALSE);
|
|
proto_item_append_text(receive_timer_item, " seconds");
|
|
break;
|
|
|
|
case DHCP_FO_PD_HASH_BUCKET_ASSIGNMENT:
|
|
|
|
proto_tree_add_item(option_tree,
|
|
hf_dhcpfo_hash_bucket_assignment, tvb,
|
|
helpliste->actualpoffset +4,
|
|
helpliste->length, FALSE);
|
|
break;
|
|
|
|
case DHCP_FO_PD_MESSAGE_DIGEST:
|
|
|
|
message_digest_type = tvb_get_guint8(tvb,helpliste->actualpoffset+4);
|
|
if(message_digest_type == 1)
|
|
{
|
|
proto_item_append_text(oi, ", HMAC-MD5");
|
|
proto_tree_add_text(option_tree, tvb, helpliste->actualpoffset+4, 1, "Message digest type: HMAC-MD5");
|
|
}
|
|
else
|
|
{
|
|
proto_item_append_text(oi, ", type not allowed");
|
|
proto_tree_add_text(option_tree, tvb, helpliste->actualpoffset+4, 1, "Message digest type: not allowed");
|
|
}
|
|
|
|
proto_tree_add_item(option_tree,
|
|
hf_dhcpfo_message_digest, tvb,
|
|
helpliste->actualpoffset+5,
|
|
helpliste->length-1,FALSE);
|
|
break;
|
|
|
|
case DHCP_FO_PD_PROTOCOL_VERSION:
|
|
|
|
protocol_version =
|
|
tvb_get_guint8(tvb, helpliste->actualpoffset+4);
|
|
|
|
proto_item_append_text(oi, ", version: %d",
|
|
protocol_version);
|
|
proto_tree_add_item(option_tree,
|
|
hf_dhcpfo_protocol_version, tvb,
|
|
helpliste->actualpoffset + 4,
|
|
helpliste->length , FALSE);
|
|
break;
|
|
|
|
case DHCP_FO_PD_TLS_REQUEST:
|
|
|
|
tls_request = tvb_get_ntohs(tvb,helpliste->actualpoffset+4);
|
|
if(tls_request == 0)
|
|
{
|
|
tls_request_string = "No TLS operation";
|
|
}
|
|
else if(tls_request == 1)
|
|
{
|
|
tls_request_string = "TLS operation desired but not required";
|
|
}
|
|
else if(tls_request == 2)
|
|
{
|
|
tls_request_string = "TLS operation is required";
|
|
}
|
|
else
|
|
{
|
|
tls_request_string = "Unknown value";
|
|
}
|
|
proto_item_append_text(oi, ", %s", tls_request_string);
|
|
|
|
proto_tree_add_text(option_tree, tvb,
|
|
helpliste->actualpoffset+4,
|
|
helpliste->length,
|
|
"TLS request: %s", tls_request_string);
|
|
break;
|
|
|
|
case DHCP_FO_PD_TLS_REPLY:
|
|
break;
|
|
case DHCP_FO_PD_REQUEST_OPTION:
|
|
break;
|
|
case DHCP_FO_PD_REPLY_OPTION:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
helpliste=helpliste->next;
|
|
}
|
|
|
|
}
|
|
|
|
|
|
}
|
|
g_free(liste);
|
|
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_dhcpfo(void)
|
|
{
|
|
static gboolean initialized = FALSE;
|
|
static unsigned int port = 0;
|
|
|
|
if (initialized) {
|
|
dissector_delete("tcp.port", port, dhcpfo_handle);
|
|
} else {
|
|
initialized = TRUE;
|
|
}
|
|
port = tcp_port_pref;
|
|
dissector_add("tcp.port", tcp_port_pref, dhcpfo_handle);
|
|
}
|
|
|
|
/* Register the protocol with Ethereal */
|
|
void
|
|
proto_register_dhcpfo(void)
|
|
{
|
|
|
|
/* Setup list of header fields See Section 1.6.1 for details*/
|
|
static hf_register_info hf[] = {
|
|
{ &hf_dhcpfo_length,
|
|
{ "Message length", "dhcpfo.length",
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
{ &hf_dhcpfo_type,
|
|
{ "Message Type", "dhcpfo.type",
|
|
FT_UINT8, BASE_DEC, VALS(failover_vals), 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{ &hf_dhcpfo_poffset,
|
|
{ "Payload Offset", "dhcpfo.poffset",
|
|
FT_UINT8, BASE_DEC, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{ &hf_dhcpfo_time,
|
|
{ "Time", "dhcpfo.time",
|
|
FT_UINT32, BASE_DEC, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{ &hf_dhcpfo_xid,
|
|
{ "Xid", "dhcpfo.xid",
|
|
FT_UINT32, BASE_HEX, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{ &hf_dhcpfo_additional_HB,
|
|
{"Additional Header Bytes", "dhcpfo.additionalheaderbytes",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{ &hf_dhcpfo_payload_data,
|
|
{"Payload Data", "dhcpfo.payloaddata",
|
|
FT_NONE, BASE_NONE, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{ &hf_dhcpfo_dhcp_style_option,
|
|
{"DHCP Style Option", "dhcpfo.dhcpstyleoption",
|
|
FT_NONE, BASE_NONE, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{ &hf_dhcpfo_option_code,
|
|
{"Option Code", "dhcpfo.optioncode",
|
|
FT_UINT16, BASE_DEC, VALS(option_code_vals), 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{&hf_dhcpfo_option_length,
|
|
{"Length", "dhcpfo.optionlength",
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{&hf_dhcpfo_binding_status,
|
|
{"Type", "dhcpfo.bindingstatus",
|
|
FT_UINT32, BASE_DEC, VALS(binding_status_vals), 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
|
|
{&hf_dhcpfo_server_state,
|
|
{"server status", "dhcpfo.serverstatus",
|
|
FT_UINT8, BASE_DEC, VALS(server_state_vals), 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
|
|
{&hf_dhcpfo_assigned_ip_address,
|
|
{"assigned ip address", "dhcpfo.assignedipaddress",
|
|
FT_IPv4, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{&hf_dhcpfo_sending_server_ip_address,
|
|
{"sending server ip-address", "dhcpfo.sendingserveripaddress",
|
|
FT_IPv4, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
|
|
|
|
{&hf_dhcpfo_addresses_transfered,
|
|
{"addresses transfered", "dhcpfo.addressestransfered",
|
|
FT_UINT8, BASE_DEC, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
|
|
{&hf_dhcpfo_client_identifier,
|
|
{"Client Identifier", "dhcpfo.clientidentifier",
|
|
FT_STRING, BASE_NONE, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{&hf_dhcpfo_client_hw_type,
|
|
{"Client Hardware Type", "dhcpfo.clienthardwaretype",
|
|
FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
"", HFILL }},
|
|
|
|
{&hf_dhcpfo_client_hardware_address,
|
|
{"Client Hardware Address", "dhcpfo.clienthardwareaddress",
|
|
FT_BYTES, BASE_NONE, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{&hf_dhcpfo_ftddns,
|
|
{"FTDDNS", "dhcpfo.ftddns",
|
|
FT_STRING, BASE_NONE, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{&hf_dhcpfo_reject_reason,
|
|
{"Reject reason", "dhcpfo.rejectreason",
|
|
FT_UINT8, BASE_DEC, VALS(reject_reason_vals), 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{&hf_dhcpfo_message,
|
|
{"Message", "dhcpfo.message",
|
|
FT_STRING, BASE_NONE, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
|
|
{&hf_dhcpfo_mclt,
|
|
{"MCLT", "dhcpfo.mclt",
|
|
FT_UINT32, BASE_DEC, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{&hf_dhcpfo_vendor_class,
|
|
{"Vendor class", "dhcpfo.vendorclass",
|
|
FT_STRING, BASE_NONE, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{&hf_dhcpfo_lease_expiration_time,
|
|
{"Lease expiration time", "dhcpfo.leaseexpirationtime",
|
|
FT_UINT32, BASE_DEC, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{&hf_dhcpfo_grace_expiration_time,
|
|
{"Grace expiration time", "dhcpfo.graceexpirationtime",
|
|
FT_UINT32, BASE_DEC, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{&hf_dhcpfo_potential_expiration_time,
|
|
{"Potential expiration time", "dhcpfo.potentialexpirationtime",
|
|
FT_UINT32, BASE_DEC, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{&hf_dhcpfo_client_last_transaction_time,
|
|
{"Client last transaction time", "dhcpfo.clientlasttransactiontime",
|
|
FT_UINT32, BASE_DEC, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{&hf_dhcpfo_start_time_of_state,
|
|
{"Start time of state", "dhcpfo.starttimeofstate",
|
|
FT_UINT32, BASE_DEC, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{&hf_dhcpfo_vendor_option,
|
|
{"Vendor option", "dhcpfo.vendoroption",
|
|
FT_NONE, BASE_NONE, NULL, 0x0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{&hf_dhcpfo_max_unacked_bndupd,
|
|
{"Max unacked BNDUPD", "dhcpfo.maxunackedbndupd",
|
|
FT_UINT8, BASE_DEC, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{&hf_dhcpfo_protocol_version,
|
|
{"Protocol version", "dhcpfo.protocolversion",
|
|
FT_UINT8, BASE_DEC, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{&hf_dhcpfo_receive_timer,
|
|
{"Receive timer", "dhcpfo.receivetimer",
|
|
FT_UINT8, BASE_DEC, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{&hf_dhcpfo_message_digest,
|
|
{"Message digest", "dhcpfo.messagedigest",
|
|
FT_STRING, BASE_NONE, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
|
|
{&hf_dhcpfo_hash_bucket_assignment,
|
|
{"Hash bucket assignment", "dhcpfo.hashbucketassignment",
|
|
FT_BYTES, BASE_HEX, NULL, 0,
|
|
"", HFILL }
|
|
},
|
|
};
|
|
|
|
/* Setup protocol subtree array */
|
|
static gint *ett[] = {
|
|
&ett_dhcpfo,
|
|
&ett_fo_payload,
|
|
&ett_fo_option,
|
|
};
|
|
|
|
module_t *dhcpfo_module;
|
|
|
|
/* Register the protocol name and description */
|
|
proto_dhcpfo = proto_register_protocol("DHCP Failover", "DHCPFO",
|
|
"dhcpfo");
|
|
|
|
/* Required function calls to register the header fields and subtrees used */
|
|
proto_register_field_array(proto_dhcpfo, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
dhcpfo_handle = create_dissector_handle(dissect_dhcpfo, proto_dhcpfo);
|
|
|
|
dhcpfo_module = prefs_register_protocol(proto_dhcpfo, proto_reg_handoff_dhcpfo);
|
|
prefs_register_uint_preference(dhcpfo_module, "tcp_port",
|
|
"DHCP failover TCP Port", "Set the port for DHCP failover communications",
|
|
10, &tcp_port_pref);
|
|
}
|