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/* packet-l2tp.c
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* Routines for Layer Two Tunnelling Protocol ( L2TP ) packet disassembly
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* John Thomes < john @ ensemblecom . com >
*
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* Minor changes by : ( 2000 - 01 - 10 )
* Laurent Cazalet < laurent . cazalet @ mailclub . net >
* Thomas Parvais < thomas . parvais @ advalvas . be >
*
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* Wireshark - Network traffic analyzer
* By Gerald Combs < gerald @ wireshark . org >
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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
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation ; either version 2
* 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 ,
* but WITHOUT ANY WARRANTY ; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE . See the
* 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
* along with this program ; if not , write to the Free Software
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* Foundation , Inc . , 51 Franklin Street , Fifth Floor , Boston , MA 02110 - 1301 USA .
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*/
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/*
* RFC 2661 for L2TPv2
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* http : //tools.ietf.org/html/rfc2661
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*
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* RFC 3931 for L2TPv3
* http : //tools.ietf.org/html/rfc3931
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*
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* Layer Two Tunneling Protocol " L2TP " number assignments :
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* http : //www.iana.org/assignments/l2tp-parameters
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*
* Pseudowire types :
*
* RFC 4591 for Frame Relay
* http : //tools.ietf.org/html/rfc4591
*
* RFC 4454 for ATM
* http : //tools.ietf.org/html/rfc4454
*
* RFC 4719 for Ethernet
* http : //tools.ietf.org/html/rfc4719
*
* RFC 4349 for HDLC
* http : //tools.ietf.org/html/rfc4349
*
* XXX - what about LAPD ?
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*/
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# include "config.h"
# include <epan/packet.h>
# include <epan/ipproto.h>
# include <epan/sminmpec.h>
# include <epan/prefs.h>
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# include <epan/conversation.h>
# include <epan/expert.h>
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# include <wsutil/md5.h>
# include <wsutil/sha1.h>
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# include "packet-l2tp.h"
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void proto_register_l2tp ( void ) ;
void proto_reg_handoff_l2tp ( void ) ;
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static int proto_l2tp = - 1 ;
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static int hf_l2tp_type = - 1 ;
static int hf_l2tp_length_bit = - 1 ;
static int hf_l2tp_seq_bit = - 1 ;
static int hf_l2tp_offset_bit = - 1 ;
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static int hf_l2tp_priority = - 1 ;
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static int hf_l2tp_version = - 1 ;
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static int hf_l2tp_length = - 1 ;
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static int hf_l2tp_tunnel = - 1 ;
static int hf_l2tp_session = - 1 ;
static int hf_l2tp_Ns = - 1 ;
static int hf_l2tp_Nr = - 1 ;
static int hf_l2tp_offset = - 1 ;
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static int hf_l2tp_avp_mandatory = - 1 ;
static int hf_l2tp_avp_hidden = - 1 ;
static int hf_l2tp_avp_length = - 1 ;
static int hf_l2tp_avp_vendor_id = - 1 ;
static int hf_l2tp_avp_type = - 1 ;
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static int hf_l2tp_tie_breaker = - 1 ;
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static int hf_l2tp_sid = - 1 ;
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static int hf_l2tp_res = - 1 ;
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static int hf_l2tp_ccid = - 1 ;
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static int hf_l2tp_cookie = - 1 ;
static int hf_l2tp_l2_spec_def = - 1 ;
static int hf_l2tp_l2_spec_atm = - 1 ;
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static int hf_l2tp_l2_spec_docsis_dmpt = - 1 ;
static int hf_l2tp_l2_spec_v = - 1 ;
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static int hf_l2tp_l2_spec_s = - 1 ;
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static int hf_l2tp_l2_spec_h = - 1 ;
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static int hf_l2tp_l2_spec_flow_id = - 1 ;
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static int hf_l2tp_l2_spec_sequence = - 1 ;
static int hf_l2tp_l2_spec_t = - 1 ;
static int hf_l2tp_l2_spec_g = - 1 ;
static int hf_l2tp_l2_spec_c = - 1 ;
static int hf_l2tp_l2_spec_u = - 1 ;
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static int hf_l2tp_cisco_avp_type = - 1 ;
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static int hf_l2tp_cablelabs_avp_type = - 1 ;
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static int hf_l2tp_avp_message_type = - 1 ;
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static int hf_l2tp_avp_assigned_tunnel_id = - 1 ;
static int hf_l2tp_avp_assigned_control_conn_id = - 1 ;
static int hf_l2tp_avp_assigned_session_id = - 1 ;
static int hf_l2tp_avp_remote_session_id = - 1 ;
static int hf_l2tp_avp_local_session_id = - 1 ;
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static int hf_l2tp_avp_called_number = - 1 ;
static int hf_l2tp_avp_calling_number = - 1 ;
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static int hf_l2tp_cisco_tie_breaker = - 1 ;
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static int hf_l2tp_cablel_avp_l_bit = - 1 ;
static int hf_l2tp_cablel_avp_tsid_group_id = - 1 ;
static int hf_l2tp_cablel_avp_frequency = - 1 ;
static int hf_l2tp_cablel_avp_modulation = - 1 ;
static int hf_l2tp_cablel_avp_m = - 1 ;
static int hf_l2tp_cablel_avp_n = - 1 ;
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/* Generated from convert_proto_tree_add_text.pl */
static int hf_l2tp_cisco_pw_type = - 1 ;
static int hf_l2tp_avp_error_code = - 1 ;
static int hf_l2tp_avp_cause_msg = - 1 ;
static int hf_l2tp_avp_host_name = - 1 ;
static int hf_l2tp_avp_maximum_bps = - 1 ;
static int hf_l2tp_avp_pseudowire_type = - 1 ;
static int hf_l2tp_avp_minimum_bps = - 1 ;
static int hf_l2tp_avp_nonce = - 1 ;
static int hf_l2tp_avp_circuit_status = - 1 ;
static int hf_l2tp_avp_receive_window_size = - 1 ;
static int hf_l2tp_avp_vendor_name = - 1 ;
static int hf_l2tp_avp_layer2_specific_sublayer = - 1 ;
static int hf_l2tp_avp_disconnect_code = - 1 ;
static int hf_l2tp_cisco_circuit_status = - 1 ;
static int hf_l2tp_cisco_remote_session_id = - 1 ;
static int hf_l2tp_avp_router_id = - 1 ;
static int hf_l2tp_avp_send_accm = - 1 ;
static int hf_l2tp_avp_last_sent_lcp_confreq = - 1 ;
static int hf_l2tp_avp_sync_framing_supported = - 1 ;
static int hf_l2tp_cisco_assigned_control_connection_id = - 1 ;
static int hf_l2tp_avp_sync_framing_type = - 1 ;
static int hf_l2tp_avp_assigned_cookie = - 1 ;
static int hf_l2tp_avp_time_out_errors = - 1 ;
static int hf_l2tp_avp_sub_address = - 1 ;
static int hf_l2tp_avp_connect_speed = - 1 ;
static int hf_l2tp_avp_analog_access_supported = - 1 ;
static int hf_l2tp_avp_private_group_id = - 1 ;
static int hf_l2tp_avp_proxy_authen_response = - 1 ;
static int hf_l2tp_avp_chap_challenge = - 1 ;
static int hf_l2tp_avp_call_serial_number = - 1 ;
static int hf_l2tp_avp_digital_access_supported = - 1 ;
static int hf_l2tp_avp_physical_channel = - 1 ;
static int hf_l2tp_avp_advisory_msg = - 1 ;
static int hf_l2tp_avp_data_sequencing = - 1 ;
static int hf_l2tp_avp_control_protocol_number = - 1 ;
static int hf_l2tp_avp_error_message = - 1 ;
static int hf_l2tp_avp_initial_received_lcp_confreq = - 1 ;
static int hf_l2tp_avp_async_framing_supported = - 1 ;
static int hf_l2tp_cisco_message_digest = - 1 ;
static int hf_l2tp_avp_circuit_type = - 1 ;
static int hf_l2tp_cisco_circuit_type = - 1 ;
static int hf_l2tp_avp_proxy_authen_challenge = - 1 ;
static int hf_l2tp_cisco_assigned_cookie = - 1 ;
static int hf_l2tp_avp_receive_accm = - 1 ;
static int hf_l2tp_stop_ccn_result_code = - 1 ;
static int hf_l2tp_avp_proxy_authen_id = - 1 ;
static int hf_l2tp_avp_digital_bearer_type = - 1 ;
static int hf_l2tp_avp_rx_connect_speed = - 1 ;
static int hf_l2tp_cisco_nonce = - 1 ;
static int hf_l2tp_avp_chap_challenge_response = - 1 ;
static int hf_l2tp_avp_cause_code = - 1 ;
static int hf_l2tp_avp_protocol_revision = - 1 ;
static int hf_l2tp_avp_alignment_errors = - 1 ;
static int hf_l2tp_avp_last_received_lcp_confreq = - 1 ;
static int hf_l2tp_avp_crc_errors = - 1 ;
static int hf_l2tp_avp_random_vector = - 1 ;
static int hf_l2tp_avp_preferred_language = - 1 ;
static int hf_l2tp_cisco_interface_mtu = - 1 ;
static int hf_l2tp_avp_async_framing_type = - 1 ;
static int hf_l2tp_avp_pw_type = - 1 ;
static int hf_l2tp_cisco_local_session_id = - 1 ;
static int hf_l2tp_avp_hardware_overruns = - 1 ;
static int hf_l2tp_avp_proxy_authen_type = - 1 ;
static int hf_l2tp_cisco_draft_avp_version = - 1 ;
static int hf_l2tp_avp_protocol_version = - 1 ;
static int hf_l2tp_result_code = - 1 ;
static int hf_l2tp_avp_buffer_overruns = - 1 ;
static int hf_l2tp_avp_remote_end_id = - 1 ;
static int hf_l2tp_cisco_pseudowire_type = - 1 ;
static int hf_l2tp_avp_message_digest = - 1 ;
static int hf_l2tp_avp_proxy_authen_name = - 1 ;
static int hf_l2tp_avp_analog_bearer_type = - 1 ;
static int hf_l2tp_avp_cause_code_direction = - 1 ;
static int hf_l2tp_avp_firmware_revision = - 1 ;
static int hf_l2tp_avp_cause_code_message = - 1 ;
static int hf_l2tp_avp_framing_errors = - 1 ;
static int hf_l2tp_cisco_remote_end_id = - 1 ;
static int hf_l2tp_avp_tx_connect_speed_v3 = - 1 ;
static int hf_l2tp_avp_rx_connect_speed_v3 = - 1 ;
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static dissector_table_t l2tp_vendor_avp_dissector_table ;
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# define UDP_PORT_L2TP 1701
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# define CONTROL_BIT(msg_info) (msg_info & 0x8000) /* Type bit control = 1 data = 0 */
# define LENGTH_BIT(msg_info) (msg_info & 0x4000) /* Length bit = 1 */
# define RESERVE_BITS(msg_info) (msg_info &0x37F8) /* Reserved bit - usused */
# define SEQUENCE_BIT(msg_info) (msg_info & 0x0800) /* SEQUENCE bit = 1 Ns and Nr fields */
# define OFFSET_BIT(msg_info) (msg_info & 0x0200) /* Offset */
# define PRIORITY_BIT(msg_info) (msg_info & 0x0100) /* Priority */
# define L2TP_VERSION(msg_info) (msg_info & 0x000f) /* Version of l2tp */
# define MANDATORY_BIT(msg_info) (msg_info & 0x8000) /* Mandatory = 1 */
# define HIDDEN_BIT(msg_info) (msg_info & 0x4000) /* Hidden = 1 */
# define AVP_LENGTH(msg_info) (msg_info & 0x03ff) /* AVP Length */
# define FRAMING_SYNC(msg_info) (msg_info & 0x0001) /* SYNC Framing Type */
# define FRAMING_ASYNC(msg_info) (msg_info & 0x0002) /* ASYNC Framing Type */
# define BEARER_DIGITAL(msg_info) (msg_info & 0x0001) /* Digital Bearer Type */
# define BEARER_ANALOG(msg_info) (msg_info & 0x0002) /* Analog Bearer Type */
# define CIRCUIT_STATUS_BIT(msg_info) (msg_info & 0x0001) /* Circuit Status */
# define CIRCUIT_TYPE_BIT(msg_info) (msg_info & 0x0001) /* Circuit Condition */
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/* DOCSIS DMPT Sub-Layer Header definitions */
# define FLOW_ID_MASK 0x0E
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static gint ett_l2tp = - 1 ;
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static gint ett_l2tp_ctrl = - 1 ;
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static gint ett_l2tp_avp = - 1 ;
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static gint ett_l2tp_avp_sub = - 1 ;
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static gint ett_l2tp_lcp = - 1 ;
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static gint ett_l2tp_l2_spec = - 1 ;
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static expert_field ei_l2tp_incorrect_digest = EI_INIT ;
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static const enum_val_t l2tpv3_cookies [ ] = {
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{ " detect " , " Detect " , - 1 } ,
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{ " cookie0 " , " None " , 0 } ,
{ " cookie4 " , " 4 Byte Cookie " , 4 } ,
{ " cookie8 " , " 8 Byte Cookie " , 8 } ,
{ NULL , NULL , 0 }
} ;
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# define L2TPv3_COOKIE_DEFAULT 0
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# define L2TPv3_PROTOCOL_ETH 0
# define L2TPv3_PROTOCOL_CHDLC 1
# define L2TPv3_PROTOCOL_FR 2
# define L2TPv3_PROTOCOL_PPP 3
# define L2TPv3_PROTOCOL_IP 4
# define L2TPv3_PROTOCOL_MPLS 5
# define L2TPv3_PROTOCOL_AAL5 6
# define L2TPv3_PROTOCOL_LAPD 7
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# define L2TPv3_PROTOCOL_DOCSIS_DMPT 8
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# define L2TPv3_PROTOCOL_ERICSSON 9
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# define L2TPv3_PROTOCOL_MAX (L2TPv3_PROTOCOL_ERICSSON + 1)
# define L2TPv3_PROTOCOL_DEFAULT L2TPv3_PROTOCOL_CHDLC
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static const enum_val_t l2tpv3_protocols [ ] = {
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{ " detect " , " Detect " , - 1 } ,
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{ " eth " , " Ethernet " , L2TPv3_PROTOCOL_ETH } ,
{ " chdlc " , " Cisco HDLC " , L2TPv3_PROTOCOL_CHDLC } ,
{ " fr " , " Frame Relay " , L2TPv3_PROTOCOL_FR } ,
{ " ppp " , " PPP " , L2TPv3_PROTOCOL_PPP } ,
{ " ip " , " IP " , L2TPv3_PROTOCOL_IP } ,
{ " mpls " , " MPLS " , L2TPv3_PROTOCOL_MPLS } ,
{ " aal5 " , " AAL5 " , L2TPv3_PROTOCOL_AAL5 } ,
{ " lapd " , " LAPD " , L2TPv3_PROTOCOL_LAPD } ,
{ " docsis-dmpt " , " DOCSIS-DMPT " , L2TPv3_PROTOCOL_DOCSIS_DMPT } ,
{ " ehdlc " , " Ericsson HDLC " , L2TPv3_PROTOCOL_ERICSSON } ,
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{ NULL , NULL , 0 }
} ;
# define L2TPv3_L2_SPECIFIC_NONE 0
# define L2TPv3_L2_SPECIFIC_DEFAULT 1
# define L2TPv3_L2_SPECIFIC_ATM 2
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# define L2TPv3_L2_SPECIFIC_LAPD 3
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# define L2TPv3_L2_SPECIFIC_DOCSIS_DMPT 4
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# define L2TPv3_L2_SPECIFIC_MAX (L2TPv3_L2_SPECIFIC_DOCSIS_DMPT + 1)
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static const enum_val_t l2tpv3_l2_specifics [ ] = {
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{ " detect " , " Detect " , - 1 } ,
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{ " none " , " None " , L2TPv3_L2_SPECIFIC_NONE } ,
{ " default " , " Default L2-Specific " , L2TPv3_L2_SPECIFIC_DEFAULT } ,
{ " atm " , " ATM-Specific " , L2TPv3_L2_SPECIFIC_ATM } ,
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{ " lapd " , " LAPD-Specific " , L2TPv3_L2_SPECIFIC_LAPD } ,
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{ " dmpt " , " DOCSIS DMPT-Specific " , L2TPv3_L2_SPECIFIC_DOCSIS_DMPT } ,
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{ NULL , NULL , 0 }
} ;
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static gint l2tpv3_cookie = - 1 ;
static gint l2tpv3_protocol = - 1 ;
static gint l2tpv3_l2_specific = - 1 ;
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# define MESSAGE_TYPE_SCCRQ 1
# define MESSAGE_TYPE_SCCRP 2
# define MESSAGE_TYPE_SCCCN 3
# define MESSAGE_TYPE_StopCCN 4
# define MESSAGE_TYPE_Reserved_5 5
# define MESSAGE_TYPE_HELLO 6
# define MESSAGE_TYPE_OCRQ 7
# define MESSAGE_TYPE_OCRP 8
# define MESSAGE_TYPE_OCCN 9
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# define MESSAGE_TYPE_ICRQ 10
# define MESSAGE_TYPE_ICRP 11
# define MESSAGE_TYPE_ICCN 12
# define MESSAGE_TYPE_Reserved_13 13
# define MESSAGE_TYPE_CDN 14
# define MESSAGE_TYPE_WEN 15
# define MESSAGE_TYPE_SLI 16
# define MESSAGE_TYPE_MDMST 17
# define MESSAGE_TYPE_SRRQ 18
# define MESSAGE_TYPE_SRRP 19
# define MESSAGE_TYPE_ACK 20
# define MESSAGE_TYPE_FSQ 21
# define MESSAGE_TYPE_FSR 22
# define MESSAGE_TYPE_MSRQ 23
# define MESSAGE_TYPE_MSRP 24
# define MESSAGE_TYPE_MSE 25
# define MESSAGE_TYPE_MSI 26
# define MESSAGE_TYPE_MSEN 27
static const value_string message_type_vals [ ] = {
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{ MESSAGE_TYPE_SCCRQ , " Start_Control_Request " } ,
{ MESSAGE_TYPE_SCCRP , " Start_Control_Reply " } ,
{ MESSAGE_TYPE_SCCCN , " Start_Control_Connected " } ,
{ MESSAGE_TYPE_StopCCN , " Stop_Control_Notification " } ,
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{ MESSAGE_TYPE_Reserved_5 , " Reserved " } ,
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{ MESSAGE_TYPE_HELLO , " Hello " } ,
{ MESSAGE_TYPE_OCRQ , " Outgoing_Call_Request " } ,
{ MESSAGE_TYPE_OCRP , " Outgoing_Call_Reply " } ,
{ MESSAGE_TYPE_OCCN , " Outgoing_Call_Connected " } ,
{ MESSAGE_TYPE_ICRQ , " Incoming_Call_Request " } ,
{ MESSAGE_TYPE_ICRP , " Incoming_Call_Reply " } ,
{ MESSAGE_TYPE_ICCN , " Incoming_Call_Connected " } ,
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{ MESSAGE_TYPE_Reserved_13 , " Reserved " } ,
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{ MESSAGE_TYPE_CDN , " Call_Disconnect_Notification " } ,
{ MESSAGE_TYPE_WEN , " WAN_Error_Notify " } ,
{ MESSAGE_TYPE_SLI , " Set_Link_Info " } ,
{ MESSAGE_TYPE_MDMST , " Modem_Status " } ,
{ MESSAGE_TYPE_SRRQ , " Service_Relay_Request_Msg " } ,
{ MESSAGE_TYPE_SRRP , " Service_Relay_Reply_Message " } ,
{ MESSAGE_TYPE_ACK , " Explicit_Acknowledgement " } ,
/* Fail Over Extensions - RFC4951 */
{ MESSAGE_TYPE_FSQ , " Failover_Session_Query_Message " } ,
{ MESSAGE_TYPE_FSR , " Failover_Session_Response_Message " } ,
/* Multicast Management - RFC4045 */
{ MESSAGE_TYPE_MSRQ , " Multicast-Session-Request " } ,
{ MESSAGE_TYPE_MSRP , " Multicast-Session-Response " } ,
{ MESSAGE_TYPE_MSE , " Multicast-Session-Establishment " } ,
{ MESSAGE_TYPE_MSI , " Multicast-Session-Information " } ,
{ MESSAGE_TYPE_MSEN , " Multicast-Session-End-Notify " } ,
{ 0 , NULL } ,
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} ;
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static value_string_ext message_type_vals_ext = VALUE_STRING_EXT_INIT ( message_type_vals ) ;
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static const value_string l2tp_message_type_short_str_vals [ ] = {
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{ MESSAGE_TYPE_SCCRQ , " SCCRQ " } ,
{ MESSAGE_TYPE_SCCRP , " SCCRP " } ,
{ MESSAGE_TYPE_SCCCN , " SCCCN " } ,
{ MESSAGE_TYPE_StopCCN , " StopCCN " } ,
{ 5 , " Reserved " } ,
{ MESSAGE_TYPE_HELLO , " Hello " } ,
{ MESSAGE_TYPE_OCRQ , " OCRQ " } ,
{ MESSAGE_TYPE_OCRP , " OCRP " } ,
{ MESSAGE_TYPE_OCCN , " OCCN " } ,
{ MESSAGE_TYPE_ICRQ , " ICRQ " } ,
{ MESSAGE_TYPE_ICRP , " ICRP " } ,
{ MESSAGE_TYPE_ICCN , " ICCN " } ,
{ 13 , " Reserved " } ,
{ MESSAGE_TYPE_CDN , " CDN " } ,
{ MESSAGE_TYPE_WEN , " WEN " } ,
{ MESSAGE_TYPE_SLI , " SLI " } ,
{ MESSAGE_TYPE_MDMST , " MDMST " } ,
{ MESSAGE_TYPE_SRRQ , " SRRQ " } ,
{ MESSAGE_TYPE_SRRP , " SRRP " } ,
{ MESSAGE_TYPE_ACK , " ACK " } ,
/* Fail Over Extensions - RFC4951 */
{ MESSAGE_TYPE_FSQ , " FSQ " } ,
{ MESSAGE_TYPE_FSR , " FSR " } ,
/* Multicast Management - RFC4045 */
{ MESSAGE_TYPE_MSRQ , " MSRQ " } ,
{ MESSAGE_TYPE_MSRP , " MSRP " } ,
{ MESSAGE_TYPE_MSE , " MSE " } ,
{ MESSAGE_TYPE_MSI , " MSI " } ,
{ MESSAGE_TYPE_MSEN , " MSEN " } ,
{ 0 , NULL } ,
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} ;
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static value_string_ext l2tp_message_type_short_str_vals_ext = VALUE_STRING_EXT_INIT ( l2tp_message_type_short_str_vals ) ;
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static const char * control_msg = " Control Message " ;
static const char * data_msg = " Data Message " ;
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static const value_string l2tp_type_vals [ ] = {
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{ 0 , " Data Message " } ,
{ 1 , " Control Message " } ,
{ 0 , NULL } ,
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} ;
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static const value_string cause_code_direction_vals [ ] = {
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{ 0 , " global error " } ,
{ 1 , " at peer " } ,
{ 2 , " at local " } ,
{ 0 , NULL } ,
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} ;
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static const true_false_string l2tp_length_bit_truth =
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{ " Length field is present " , " Length field is not present " } ;
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static const true_false_string l2tp_seq_bit_truth =
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{ " Ns and Nr fields are present " , " Ns and Nr fields are not present " } ;
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static const true_false_string l2tp_offset_bit_truth =
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{ " Offset Size field is present " , " Offset size field is not present " } ;
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static const true_false_string l2tp_priority_truth =
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{ " This data message has priority " , " No priority " } ;
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static const value_string authen_type_vals [ ] = {
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{ 0 , " Reserved " } ,
{ 1 , " Textual username/password exchange " } ,
{ 2 , " PPP CHAP " } ,
{ 3 , " PPP PAP " } ,
{ 4 , " No Authentication " } ,
{ 5 , " Microsoft CHAP Version 1 " } ,
{ 6 , " Reserved " } ,
{ 7 , " EAP " } ,
{ 0 , NULL }
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} ;
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static const value_string data_sequencing_vals [ ] = {
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{ 0 , " No incoming data packets require sequencing " } ,
{ 1 , " Only non-IP data packets require sequencing " } ,
{ 2 , " All incoming data packets require sequencing " } ,
{ 0 , NULL }
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} ;
static const value_string l2_sublayer_vals [ ] = {
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{ 0 , " No L2-Specific Sublayer " } ,
{ 1 , " Default L2-Specific Sublayer present " } ,
{ 2 , " ATM-Specific Sublayer present " } ,
{ 3 , " MPT-Specific Sublayer " } ,
{ 4 , " PSP-Specific Sublayer " } ,
{ 0 , NULL }
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} ;
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/* Result Code values for the StopCCN message */
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static const value_string result_code_stopccn_vals [ ] = {
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{ 0 , " Reserved " , } ,
{ 1 , " General request to clear control connection " , } ,
{ 2 , " General error, Error Code indicates the problem " , } ,
{ 3 , " Control connection already exists " , } ,
{ 4 , " Requester is not authorized to establish a control connection " , } ,
{ 5 , " The protocol version of the requester is not supported " , } ,
{ 6 , " Requester is being shut down " , } ,
{ 7 , " Finite state machine error or timeout " , } ,
{ 8 , " Control connection due to mismatching CCDS value " , } , /* [RFC3308] */
{ 0 , NULL }
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} ;
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/* Result Code values for the CDN message */
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static const value_string result_code_cdn_vals [ ] = {
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{ 0 , " Reserved " , } ,
{ 1 , " Session disconnected due to loss of carrier or circuit disconnect " , } ,
{ 2 , " Session disconnected for the reason indicated in Error Code " , } ,
{ 3 , " Session disconnected for administrative reasons " , } ,
{ 4 , " Appropriate facilities unavailable (temporary condition) " , } ,
{ 5 , " Appropriate facilities unavailable (permanent condition) " , } ,
{ 6 , " Invalid destination " , } ,
{ 7 , " Call failed due to no carrier detected " , } ,
{ 8 , " Call failed due to detection of a busy signal " , } ,
{ 9 , " Call failed due to lack of a dial tone " , } ,
{ 10 , " Call was not established within time allotted by LAC " , } ,
{ 11 , " Call was connected but no appropriate framing was detected " , } ,
{ 12 , " Disconnecting call due to mismatching SDS value " , } ,
{ 13 , " Session not established due to losing tie breaker " , } ,
{ 14 , " Session not established due to unsupported PW type " , } ,
{ 15 , " Session not established, sequencing required without valid L2-Specific Sublayer " , } ,
{ 16 , " Finite state machine error or timeout " , } ,
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{ 17 , " FR PVC was deleted permanently (no longer provisioned) " , } , /* [RFC4591] */
{ 18 , " FR PVC has been INACTIVE for an extended period of time " , } , /* [RFC4591] */
{ 19 , " Mismatched FR Header Length " , } , /* [RFC4591] */
{ 20 , " HDLC Link was deleted permanently (no longer provisioned) " , } , /* [RFC4349] */
{ 21 , " HDLC Link has been INACTIVE for an extended period of time " , } , /* [RFC4349] */
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{ 22 , " Session not established due to other LCCE can not support the OAM Cell Emulation " , } , /* [RFC4454] */
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{ 23 , " Mismatching interface MTU " , } , /* [RFC4667] */
{ 24 , " Attempt to connect to non-existent forwarder " , } , /* [RFC4667] */
{ 25 , " Attempt to connect to unauthorized forwarder " , } , /* [RFC4667] */
{ 26 , " Loop Detected " , } , /* [draft-ietf-l2tpext-tunnel-switching-06.txt] */
{ 27 , " Attachment Circuit bound to different PE " , } , /* [RFC6074] */
{ 28 , " Attachment Circuit bound to different remote Attachment Circuit " , } , /* [RFC6074] */
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{ 29 , " Unassigned " , } ,
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{ 30 , " Return code to indicate connection was refused because of TDM PW parameters. The error code indicates the problem. " , } , /* [RFC5611] */
{ 31 , " Sequencing not supported " , } , /* [RFC6073] */
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{ 0 , NULL }
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} ;
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static value_string_ext result_code_cdn_vals_ext = VALUE_STRING_EXT_INIT ( result_code_cdn_vals ) ;
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static const value_string error_code_vals [ ] = {
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{ 0 , " No General Error " , } ,
{ 1 , " No control connection exists yet for this pair of LCCEs " , } ,
{ 2 , " Length is wrong " , } ,
{ 3 , " One of the field values was out of range " , } ,
{ 4 , " Insufficient resources to handle this operation now " , } ,
{ 5 , " Invalid Session ID " , } ,
{ 6 , " A generic vendor-specific error occurred " , } ,
{ 7 , " Try another " , } ,
{ 8 , " Receipt of an unknown AVP with the M bit set " , } ,
{ 9 , " Try another directed " , } ,
{ 10 , " Next hop unreachable " , } ,
{ 11 , " Next hop busy " , } ,
{ 12 , " TSA busy " , } ,
{ 0 , NULL }
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} ;
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# define CONTROL_MESSAGE 0
# define RESULT_ERROR_CODE 1
# define PROTOCOL_VERSION 2
# define FRAMING_CAPABILITIES 3
# define BEARER_CAPABILITIES 4
# define TIE_BREAKER 5
# define FIRMWARE_REVISION 6
# define HOST_NAME 7
# define VENDOR_NAME 8
# define ASSIGNED_TUNNEL_ID 9
# define RECEIVE_WINDOW_SIZE 10
# define CHALLENGE 11
# define CAUSE_CODE 12
# define CHALLENGE_RESPONSE 13
# define ASSIGNED_SESSION 14
# define CALL_SERIAL_NUMBER 15
# define MINIMUM_BPS 16
# define MAXIMUM_BPS 17
# define BEARER_TYPE 18
# define FRAMING_TYPE 19
# define CALLED_NUMBER 21
# define CALLING_NUMBER 22
# define SUB_ADDRESS 23
# define TX_CONNECT_SPEED 24
# define PHYSICAL_CHANNEL 25
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# define INITIAL_RECEIVED_LCP_CONFREQ 26
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# define LAST_SENT_LCP_CONFREQ 27
# define LAST_RECEIVED_LCP_CONFREQ 28
# define PROXY_AUTHEN_TYPE 29
# define PROXY_AUTHEN_NAME 30
# define PROXY_AUTHEN_CHALLENGE 31
# define PROXY_AUTHEN_ID 32
# define PROXY_AUTHEN_RESPONSE 33
# define CALL_STATUS_AVPS 34
# define ACCM 35
# define RANDOM_VECTOR 36
# define PRIVATE_GROUP_ID 37
# define RX_CONNECT_SPEED 38
# define SEQUENCING_REQUIRED 39
# define PPP_DISCONNECT_CAUSE_CODE 46 /* RFC 3145 */
# define EXTENDED_VENDOR_ID 58
# define MESSAGE_DIGEST 59
# define ROUTER_ID 60
# define ASSIGNED_CONTROL_CONN_ID 61
# define PW_CAPABILITY_LIST 62
# define LOCAL_SESSION_ID 63
# define REMOTE_SESSION_ID 64
# define ASSIGNED_COOKIE 65
# define REMOTE_END_ID 66
# define PW_TYPE 68
# define L2_SPECIFIC_SUBLAYER 69
# define DATA_SEQUENCING 70
# define CIRCUIT_STATUS 71
# define PREFERRED_LANGUAGE 72
# define CTL_MSG_AUTH_NONCE 73
# define TX_CONNECT_SPEED_V3 74
# define RX_CONNECT_SPEED_V3 75
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/* http://www.iana.org/assignments/l2tp-parameters/l2tp-parameters.xhtml */
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# define NUM_AVP_TYPES 102
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static const value_string avp_type_vals [ ] = {
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{ CONTROL_MESSAGE , " Control Message " } ,
{ RESULT_ERROR_CODE , " Result-Error Code " } ,
{ PROTOCOL_VERSION , " Protocol Version " } ,
{ FRAMING_CAPABILITIES , " Framing Capabilities " } ,
{ BEARER_CAPABILITIES , " Bearer Capabilities " } ,
{ TIE_BREAKER , " Tie Breaker " } ,
{ FIRMWARE_REVISION , " Firmware Revision " } ,
{ HOST_NAME , " Host Name " } ,
{ VENDOR_NAME , " Vendor Name " } ,
{ ASSIGNED_TUNNEL_ID , " Assigned Tunnel ID " } ,
{ RECEIVE_WINDOW_SIZE , " Receive Window Size " } ,
{ CHALLENGE , " Challenge " } ,
{ CAUSE_CODE , " Cause Code " } ,
{ CHALLENGE_RESPONSE , " Challenge Response " } ,
{ ASSIGNED_SESSION , " Assigned Session " } ,
{ CALL_SERIAL_NUMBER , " Call Serial Number " } ,
{ MINIMUM_BPS , " Minimum BPS " } ,
{ MAXIMUM_BPS , " Maximum BPS " } ,
{ BEARER_TYPE , " Bearer Type " } ,
{ FRAMING_TYPE , " Framing Type " } ,
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{ 20 , " Reserved " } ,
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{ CALLED_NUMBER , " Called Number " } ,
{ CALLING_NUMBER , " Calling Number " } ,
{ SUB_ADDRESS , " Sub-Address " } ,
{ TX_CONNECT_SPEED , " Connect Speed " } ,
{ PHYSICAL_CHANNEL , " Physical Channel " } ,
{ INITIAL_RECEIVED_LCP_CONFREQ , " Initial Received LCP CONFREQ " } ,
{ LAST_SENT_LCP_CONFREQ , " Last Sent LCP CONFREQ " } ,
{ LAST_RECEIVED_LCP_CONFREQ , " Last Received LCP CONFREQ " } ,
{ PROXY_AUTHEN_TYPE , " Proxy Authen Type " } ,
{ PROXY_AUTHEN_NAME , " Proxy Authen Name " } ,
{ PROXY_AUTHEN_CHALLENGE , " Proxy Authen Challenge " } ,
{ PROXY_AUTHEN_ID , " Proxy Authen ID " } ,
{ PROXY_AUTHEN_RESPONSE , " Proxy Authen Response " } ,
{ CALL_STATUS_AVPS , " Call status AVPs " } ,
{ ACCM , " ACCM " } ,
{ RANDOM_VECTOR , " Random Vector " } ,
{ PRIVATE_GROUP_ID , " Private group ID " } ,
{ RX_CONNECT_SPEED , " RxConnect Speed " } ,
{ SEQUENCING_REQUIRED , " Sequencing Required " } ,
{ PPP_DISCONNECT_CAUSE_CODE , " PPP Disconnect Cause Code " } ,
{ EXTENDED_VENDOR_ID , " Extended Vendor ID " } ,
{ MESSAGE_DIGEST , " Message Digest " } ,
{ ROUTER_ID , " Router ID " } ,
{ ASSIGNED_CONTROL_CONN_ID , " Assigned Control Connection ID " } ,
{ PW_CAPABILITY_LIST , " Pseudowire Capability List " } ,
{ LOCAL_SESSION_ID , " Local Session ID " } ,
{ REMOTE_SESSION_ID , " Remote Session ID " } ,
{ ASSIGNED_COOKIE , " Assigned Cookie " } ,
{ REMOTE_END_ID , " Remote End ID " } ,
{ PW_TYPE , " Pseudowire Type " } ,
{ L2_SPECIFIC_SUBLAYER , " Layer2 Specific Sublayer " } ,
{ DATA_SEQUENCING , " Data Sequencing " } ,
{ CIRCUIT_STATUS , " Circuit Status " } ,
{ PREFERRED_LANGUAGE , " Preferred Language " } ,
{ CTL_MSG_AUTH_NONCE , " Control Message Authentication Nonce " } ,
{ TX_CONNECT_SPEED_V3 , " Tx Connect Speed Version 3 " } ,
{ RX_CONNECT_SPEED_V3 , " Rx Connect Speed Version 3 " } ,
{ 76 , " Failover Capability " } , /*[RFC4951] */
{ 77 , " Tunnel Recovery " } , /*[RFC4951] */
{ 78 , " Suggested Control Sequence " } , /*[RFC4951] */
{ 79 , " Failover Session State " } , /*[RFC4951] */
{ 80 , " Multicast Capability " } , /*[RFC4045] */
{ 81 , " New Outgoing Sessions " } , /*[RFC4045] */
{ 82 , " New Outgoing Sessions Acknowledgement " } , /*[RFC4045] */
{ 83 , " Withdraw Outgoing Sessions " } , /*[RFC4045] */
{ 84 , " Multicast Packets Priority " } , /*[RFC4045] */
{ 85 , " Frame-Relay Header Length " } , /*[RFC4591] */
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{ 86 , " ATM Maximum Concatenated Cells " } , /*[RFC4454] */
{ 87 , " OAM Emulation Required " } , /*[RFC4454] */
{ 88 , " ATM Alarm Status " } , /*[RFC4454] */
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/* Also, see ATM Alarm Status AVP Values below */
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{ 89 , " Attachment Group Identifier " } , /*[RFC4667] */
{ 90 , " Local End Identifier " } , /*[RFC4667] */
{ 91 , " Interface Maximum Transmission Unit " } , /*[RFC4667] */
{ 92 , " FCS Retention " } , /*[RFC4720] */
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{ 93 , " Tunnel Switching Aggregator ID " } , /*[draft-ietf-l2tpext-tunnel-switching-06.txt] */
{ 94 , " Maximum Receive Unit (MRU) " } , /*[RFC4623] */
{ 95 , " Maximum Reassembled Receive Unit (MRRU) " } , /*[RFC4623] */
{ 96 , " VCCV Capability " } , /*[RFC5085] */
{ 97 , " Connect Speed Update " } , /*[RFC5515] */
{ 98 , " Connect Speed Update Enable " } , /*[RFC5515] */
{ 99 , " TDM Pseudowire " } , /*[RFC5611] */
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{ 100 , " RTP AVP " } , /*[RFC5611] */
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{ 101 , " PW Switching Point " } , /*[RFC6073] */
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{ 0 , NULL }
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} ;
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static value_string_ext avp_type_vals_ext = VALUE_STRING_EXT_INIT ( avp_type_vals ) ;
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# define CISCO_ASSIGNED_CONNECTION_ID 1
# define CISCO_PW_CAPABILITY_LIST 2
# define CISCO_LOCAL_SESSION_ID 3
# define CISCO_REMOTE_SESSION_ID 4
# define CISCO_ASSIGNED_COOKIE 5
# define CISCO_REMOTE_END_ID 6
# define CISCO_PW_TYPE 7
# define CISCO_CIRCUIT_STATUS 8
# define CISCO_SESSION_TIE_BREAKER 9
# define CISCO_DRAFT_AVP_VERSION 10
# define CISCO_MESSAGE_DIGEST 12
# define CISCO_AUTH_NONCE 13
# define CISCO_INTERFACE_MTU 14
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static const value_string cisco_avp_type_vals [ ] = {
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{ CISCO_ASSIGNED_CONNECTION_ID , " Assigned Connection ID " } ,
{ CISCO_PW_CAPABILITY_LIST , " Pseudowire Capabilities List " } ,
{ CISCO_LOCAL_SESSION_ID , " Local Session ID " } ,
{ CISCO_REMOTE_SESSION_ID , " Remote Session ID " } ,
{ CISCO_ASSIGNED_COOKIE , " Assigned Cookie " } ,
{ CISCO_REMOTE_END_ID , " Remote End ID " } ,
{ CISCO_PW_TYPE , " Pseudowire Type " } ,
{ CISCO_CIRCUIT_STATUS , " Circuit Status " } ,
{ CISCO_SESSION_TIE_BREAKER , " Session Tie Breaker " } ,
{ CISCO_DRAFT_AVP_VERSION , " Draft AVP Version " } ,
{ CISCO_MESSAGE_DIGEST , " Message Digest " } ,
{ CISCO_AUTH_NONCE , " Control Message Authentication Nonce " } ,
{ CISCO_INTERFACE_MTU , " Interface MTU " } ,
{ 0 , NULL }
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} ;
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static const value_string cablelabs_avp_type_vals [ ] = {
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/* 7.5.2 DEPI Specific AVPs */
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{ 0 , " Reserved " } ,
{ 1 , " DEPI Result Code " } ,
{ 2 , " DEPI Resource Allocation Request " } ,
{ 3 , " DEPI Resource Allocation Reply " } ,
{ 4 , " DEPI Local MTU " } ,
{ 5 , " DOCSIS SYNC Control " } ,
{ 6 , " EQAM Capability Bits " } ,
{ 7 , " DEPI Remote MTU " } ,
{ 8 , " DEPI Local UDP Port " } ,
{ 9 , " DPR Session Type " } ,
{ 10 , " DPR Session Status " } ,
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/* 7.5.3 QAM Channel PHY AVPs */
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{ 100 , " Downstream QAM Channel TSID Group " } ,
{ 101 , " Downstream QAM Channel Frequency " } ,
{ 102 , " Downstream QAM Channel Power " } ,
{ 103 , " Downstream QAM Channel Modulation " } ,
{ 104 , " Downstream QAM Channel J.83 Annex " } ,
{ 105 , " Downstream QAM Channel Symbol Rate " } ,
{ 106 , " Downstream QAM Channel Interleaver Depth " } ,
{ 107 , " Downstream QAM Channel RF Block Muting53 " } ,
/* 7.5.4 DEPI Redundancy Capabilities AVPs */
{ 200 , " DEPI Redundancy Capabilities " } ,
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{ 0 , NULL }
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} ;
static const value_string l2tp_cablel_modulation_vals [ ] = {
{ 0 , " 64-QAM " } ,
{ 1 , " 128-QAM " } ,
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{ 0 , NULL }
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} ;
2006-08-14 21:37:12 +00:00
static const value_string pw_types_vals [ ] = {
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{ 0x0001 , " Frame Relay DLCI " } ,
{ 0x0002 , " ATM AAL5 SDU VCC transport " } ,
{ 0x0003 , " ATM Cell transparent Port Mode " } ,
{ 0x0004 , " Ethernet VLAN " } ,
{ 0x0005 , " Ethernet " } ,
{ 0x0006 , " HDLC " } ,
{ 0x0007 , " PPP " } ,
{ 0x0009 , " ATM Cell transport VCC Mode " } ,
{ 0x000A , " ATM Cell transport VPC Mode " } ,
{ 0x000B , " IP Transport " } ,
{ 0x000C , " MPEG-TS Payload Type (MPTPW) " } ,
{ 0x000D , " Packet Streaming Protocol (PSPPW) " } ,
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/* 0x000E-0x0010 Unassigned */
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{ 0x0011 , " Structure-agnostic E1 circuit " } , /* [RFC5611] */
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{ 0x0012 , " Structure-agnostic T1 (DS1) circuit " } , /* [RFC5611] */
{ 0x0013 , " Structure-agnostic E3 circuit " } , /* [RFC5611] */
{ 0x0014 , " Structure-agnostic T3 (DS3) circuit " } , /* [RFC5611] */
{ 0x0015 , " CESoPSN basic mode " } , /* [RFC5611] */
{ 0x0016 , " Unassigned " } ,
{ 0x0017 , " CESoPSN TDM with CAS " } , /* [RFC5611] */
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{ 0 , NULL } ,
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} ;
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2013-07-18 02:42:06 +00:00
static const true_false_string tfs_up_down = { " Up " , " Down " } ;
static const true_false_string tfs_new_existing = { " New " , " Existing " } ;
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static dissector_handle_t ppp_hdlc_handle ;
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static dissector_handle_t ppp_lcp_options_handle ;
2000-11-19 02:00:03 +00:00
2010-09-24 02:51:40 +00:00
static dissector_handle_t eth_withoutfcs_handle ;
static dissector_handle_t chdlc_handle ;
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static dissector_handle_t fr_handle ;
static dissector_handle_t ip_handle ;
static dissector_handle_t mpls_handle ;
2009-02-25 09:26:27 +00:00
static dissector_handle_t atm_oam_handle ;
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static dissector_handle_t llc_handle ;
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static dissector_handle_t lapd_handle ;
2009-11-07 19:41:58 +00:00
static dissector_handle_t mp2t_handle ;
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static dissector_handle_t ehdlc_handle ;
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static dissector_handle_t data_handle ;
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static dissector_handle_t l2tp_udp_handle ;
static dissector_handle_t l2tp_ip_handle ;
# define L2TP_HMAC_MD5 0
# define L2TP_HMAC_SHA1 1
# define L2TP_HMAC_MD5_KEY_LEN 16
# define L2TP_HMAC_MD5_DIGEST_LEN 16
# define L2TP_HMAC_SHA1_DIGEST_LEN 20
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typedef struct l2tpv3_conversation {
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address lcce1 ;
guint16 lcce1_port ;
address lcce2 ;
guint16 lcce2_port ;
port_type pt ;
struct l2tpv3_tunnel * tunnel ;
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} l2tpv3_conversation_t ;
typedef struct l2tpv3_tunnel {
l2tpv3_conversation_t * conv ;
address lcce1 ;
guint32 lcce1_id ;
guint8 * lcce1_nonce ;
gint lcce1_nonce_len ;
address lcce2 ;
guint32 lcce2_id ;
guint8 * lcce2_nonce ;
gint lcce2_nonce_len ;
gchar * shared_key_secret ;
guint8 shared_key [ L2TP_HMAC_MD5_KEY_LEN ] ;
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GSList * sessions ;
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} l2tpv3_tunnel_t ;
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typedef struct lcce_settings {
guint32 id ;
gint cookie_len ;
gint l2_specific ;
} lcce_settings_t ;
typedef struct l2tpv3_session {
lcce_settings_t lcce1 ;
lcce_settings_t lcce2 ;
gint pw_type ;
} l2tpv3_session_t ;
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static const gchar * shared_secret = " " ;
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static GSList * list_heads = NULL ;
static void update_shared_key ( l2tpv3_tunnel_t * tunnel )
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{
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const gchar * secret = " " ;
/* There is at least one nonce in the packet, so we can do authentication,
otherwise it ' s just a plain digest without nonces . */
if ( tunnel - > lcce1_nonce ! = NULL | | tunnel - > lcce2_nonce ! = NULL ) {
secret = shared_secret ;
}
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/* If there's no shared key in the conversation context, or the secret has been changed */
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if ( tunnel - > shared_key_secret = = NULL | | strcmp ( secret , tunnel - > shared_key_secret ) ! = 0 ) {
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/* For secret specification, see RFC 3931 pg 37 */
guint8 data = 2 ;
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md5_hmac ( & data , 1 , secret , strlen ( secret ) , tunnel - > shared_key ) ;
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tunnel - > shared_key_secret = wmem_strdup ( wmem_file_scope ( ) , secret ) ;
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}
}
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static void md5_hmac_digest ( l2tpv3_tunnel_t * tunnel ,
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tvbuff_t * tvb ,
int length ,
int idx ,
int avp_len ,
int msg_type ,
packet_info * pinfo ,
guint8 digest [ 20 ] )
{
guint8 zero [ L2TP_HMAC_MD5_DIGEST_LEN ] ;
md5_hmac_state_t ms ;
int remainder ;
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int offset = 0 ;
if ( tunnel - > conv - > pt = = PT_NONE ) /* IP encapsulated L2TPv3 */
offset = 4 ;
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md5_hmac_init ( & ms , tunnel - > shared_key , L2TP_HMAC_MD5_KEY_LEN ) ;
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if ( msg_type ! = MESSAGE_TYPE_SCCRQ ) {
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if ( tunnel - > lcce1_nonce ! = NULL & & tunnel - > lcce2_nonce ! = NULL ) {
if ( ADDRESSES_EQUAL ( & tunnel - > lcce1 , & pinfo - > src ) ) {
md5_hmac_append ( & ms , tunnel - > lcce1_nonce , tunnel - > lcce1_nonce_len ) ;
md5_hmac_append ( & ms , tunnel - > lcce2_nonce , tunnel - > lcce2_nonce_len ) ;
} else {
md5_hmac_append ( & ms , tunnel - > lcce2_nonce , tunnel - > lcce2_nonce_len ) ;
md5_hmac_append ( & ms , tunnel - > lcce1_nonce , tunnel - > lcce1_nonce_len ) ;
}
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}
}
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md5_hmac_append ( & ms , tvb_get_ptr ( tvb , offset , idx + 1 - offset ) , idx + 1 - offset ) ;
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/* Message digest is calculated with an empty message digest field */
memset ( zero , 0 , L2TP_HMAC_MD5_DIGEST_LEN ) ;
md5_hmac_append ( & ms , zero , avp_len - 1 ) ;
remainder = length - ( idx + avp_len ) ;
md5_hmac_append ( & ms , tvb_get_ptr ( tvb , idx + avp_len , remainder ) , remainder ) ;
md5_hmac_finish ( & ms , digest ) ;
}
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static void sha1_hmac_digest ( l2tpv3_tunnel_t * tunnel ,
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tvbuff_t * tvb ,
int length ,
int idx ,
int avp_len ,
int msg_type ,
packet_info * pinfo ,
guint8 digest [ 20 ] )
{
guint8 zero [ L2TP_HMAC_SHA1_DIGEST_LEN ] ;
sha1_hmac_context ms ;
int remainder ;
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int offset = 0 ;
if ( tunnel - > conv - > pt = = PT_NONE ) /* IP encapsulated L2TPv3 */
offset = 4 ;
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sha1_hmac_starts ( & ms , tunnel - > shared_key , L2TP_HMAC_MD5_KEY_LEN ) ;
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if ( msg_type ! = MESSAGE_TYPE_SCCRQ ) {
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if ( tunnel - > lcce1_nonce ! = NULL & & tunnel - > lcce2_nonce ! = NULL ) {
if ( ADDRESSES_EQUAL ( & tunnel - > lcce1 , & pinfo - > src ) ) {
sha1_hmac_update ( & ms , tunnel - > lcce1_nonce , tunnel - > lcce1_nonce_len ) ;
sha1_hmac_update ( & ms , tunnel - > lcce2_nonce , tunnel - > lcce2_nonce_len ) ;
} else {
sha1_hmac_update ( & ms , tunnel - > lcce2_nonce , tunnel - > lcce2_nonce_len ) ;
sha1_hmac_update ( & ms , tunnel - > lcce1_nonce , tunnel - > lcce1_nonce_len ) ;
}
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}
}
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sha1_hmac_update ( & ms , tvb_get_ptr ( tvb , 0 , idx + 1 - offset ) , idx + 1 - offset ) ;
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/* Message digest is calculated with an empty message digest field */
memset ( zero , 0 , L2TP_HMAC_SHA1_DIGEST_LEN ) ;
sha1_hmac_update ( & ms , zero , avp_len - 1 ) ;
remainder = length - ( idx + avp_len ) ;
sha1_hmac_update ( & ms , tvb_get_ptr ( tvb , idx + avp_len , remainder ) , remainder ) ;
sha1_hmac_finish ( & ms , digest ) ;
}
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static int check_control_digest ( l2tpv3_tunnel_t * tunnel ,
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tvbuff_t * tvb ,
int length ,
int idx ,
int avp_len ,
int msg_type ,
packet_info * pinfo )
{
guint8 digest [ L2TP_HMAC_SHA1_DIGEST_LEN ] ;
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if ( ! tunnel )
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return 1 ;
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update_shared_key ( tunnel ) ;
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switch ( tvb_get_guint8 ( tvb , idx ) ) {
case L2TP_HMAC_MD5 :
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if ( ( avp_len - 1 ) ! = L2TP_HMAC_MD5_DIGEST_LEN )
return - 1 ;
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md5_hmac_digest ( tunnel , tvb , length , idx , avp_len , msg_type , pinfo , digest ) ;
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break ;
case L2TP_HMAC_SHA1 :
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if ( ( avp_len - 1 ) ! = L2TP_HMAC_SHA1_DIGEST_LEN )
return - 1 ;
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sha1_hmac_digest ( tunnel , tvb , length , idx , avp_len , msg_type , pinfo , digest ) ;
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break ;
default :
return 1 ;
break ;
}
if ( memcmp ( digest , tvb_get_ptr ( tvb , idx + 1 , avp_len - 1 ) , avp_len - 1 ) ! = 0 )
return - 1 ;
return 0 ;
}
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static void store_cma_nonce ( l2tpv3_tunnel_t * tunnel ,
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tvbuff_t * tvb ,
int offset ,
int length ,
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int msg_type )
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{
guint8 * nonce = NULL ;
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if ( ! tunnel )
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return ;
switch ( msg_type ) {
case MESSAGE_TYPE_SCCRQ :
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if ( ! tunnel - > lcce1_nonce ) {
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tunnel - > lcce1_nonce = ( guint8 * ) wmem_alloc ( wmem_file_scope ( ) , length ) ;
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tunnel - > lcce1_nonce_len = length ;
nonce = tunnel - > lcce1_nonce ;
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}
break ;
case MESSAGE_TYPE_SCCRP :
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if ( ! tunnel - > lcce2_nonce ) {
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tunnel - > lcce2_nonce = ( guint8 * ) wmem_alloc ( wmem_file_scope ( ) , length ) ;
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tunnel - > lcce2_nonce_len = length ;
nonce = tunnel - > lcce2_nonce ;
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}
break ;
default :
break ;
}
if ( nonce )
tvb_memcpy ( tvb , ( void * ) nonce , offset , length ) ;
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return ;
}
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static void store_ccid ( l2tpv3_tunnel_t * tunnel ,
tvbuff_t * tvb ,
int offset ,
int msg_type )
{
if ( ! tunnel )
return ;
switch ( msg_type ) {
case MESSAGE_TYPE_SCCRQ :
tunnel - > lcce1_id = tvb_get_ntohl ( tvb , offset ) ;
break ;
case MESSAGE_TYPE_SCCRP :
tunnel - > lcce2_id = tvb_get_ntohl ( tvb , offset ) ;
break ;
default :
break ;
}
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return ;
}
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static l2tpv3_session_t * find_session ( l2tpv3_tunnel_t * tunnel ,
guint32 lcce1_id ,
guint32 lcce2_id )
{
l2tpv3_session_t * session = NULL ;
GSList * iterator ;
iterator = tunnel - > sessions ;
while ( iterator ) {
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session = ( l2tpv3_session_t * ) iterator - > data ;
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if ( ( session - > lcce1 . id = = lcce1_id ) | |
( session - > lcce2 . id = = lcce2_id ) ) {
return session ;
}
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iterator = g_slist_next ( iterator ) ;
}
return NULL ;
}
static void init_session ( l2tpv3_session_t * session )
{
session - > lcce1 . cookie_len = session - > lcce2 . cookie_len = - 1 ;
session - > lcce1 . l2_specific = session - > lcce2 . l2_specific = - 1 ;
session - > pw_type = - 1 ;
}
static l2tpv3_session_t * alloc_session ( void )
{
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l2tpv3_session_t * session = wmem_new0 ( wmem_packet_scope ( ) , l2tpv3_session_t ) ;
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init_session ( session ) ;
return session ;
}
static l2tpv3_session_t * store_lsession_id ( l2tpv3_session_t * _session ,
tvbuff_t * tvb ,
int offset ,
int msg_type )
{
l2tpv3_session_t * session = _session ;
switch ( msg_type ) {
case MESSAGE_TYPE_ICRQ :
case MESSAGE_TYPE_OCRQ :
case MESSAGE_TYPE_ICRP :
case MESSAGE_TYPE_OCRP :
break ;
default :
return session ;
}
if ( session = = NULL )
session = alloc_session ( ) ;
switch ( msg_type ) {
case MESSAGE_TYPE_ICRQ :
case MESSAGE_TYPE_OCRQ :
session - > lcce1 . id = tvb_get_ntohl ( tvb , offset ) ;
break ;
case MESSAGE_TYPE_ICRP :
case MESSAGE_TYPE_OCRP :
session - > lcce2 . id = tvb_get_ntohl ( tvb , offset ) ;
break ;
}
return session ;
}
static l2tpv3_session_t * store_rsession_id ( l2tpv3_session_t * _session ,
tvbuff_t * tvb ,
int offset ,
int msg_type )
{
l2tpv3_session_t * session = _session ;
switch ( msg_type ) {
case MESSAGE_TYPE_ICRP :
case MESSAGE_TYPE_OCRP :
break ;
default :
return session ;
}
if ( session = = NULL )
session = alloc_session ( ) ;
session - > lcce1 . id = tvb_get_ntohl ( tvb , offset ) ;
return session ;
}
static l2tpv3_session_t * store_cookie_len ( l2tpv3_session_t * _session ,
int len ,
int msg_type )
{
l2tpv3_session_t * session = _session ;
switch ( msg_type ) {
case MESSAGE_TYPE_ICRQ :
case MESSAGE_TYPE_OCRQ :
case MESSAGE_TYPE_ICRP :
case MESSAGE_TYPE_OCRP :
break ;
default :
return session ;
}
if ( session = = NULL )
session = alloc_session ( ) ;
switch ( msg_type ) {
case MESSAGE_TYPE_ICRQ :
case MESSAGE_TYPE_OCRQ :
session - > lcce1 . cookie_len = len ;
break ;
case MESSAGE_TYPE_ICRP :
case MESSAGE_TYPE_OCRP :
session - > lcce2 . cookie_len = len ;
break ;
}
return session ;
}
static l2tpv3_session_t * store_pw_type ( l2tpv3_session_t * _session ,
tvbuff_t * tvb ,
int offset ,
int msg_type )
{
l2tpv3_session_t * session = _session ;
gint result = l2tpv3_protocol ;
guint16 pw_type ;
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switch ( msg_type ) {
case MESSAGE_TYPE_ICRQ :
case MESSAGE_TYPE_OCRQ :
break ;
default :
return session ;
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}
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if ( session = = NULL )
session = alloc_session ( ) ;
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pw_type = tvb_get_ntohs ( tvb , offset ) ;
switch ( pw_type ) {
case 0x0007 :
result = L2TPv3_PROTOCOL_PPP ; break ;
case 0x0005 :
result = L2TPv3_PROTOCOL_ETH ; break ;
case 0x0006 :
result = L2TPv3_PROTOCOL_CHDLC ; break ;
case 0x0002 :
result = L2TPv3_PROTOCOL_AAL5 ; break ;
case 0x0001 :
result = L2TPv3_PROTOCOL_FR ; break ;
default :
break ;
}
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session - > pw_type = result ;
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return session ;
}
static l2tpv3_session_t * store_l2_sublayer ( l2tpv3_session_t * _session ,
tvbuff_t * tvb ,
int offset ,
int msg_type )
{
l2tpv3_session_t * session = _session ;
gint result = l2tpv3_l2_specific ;
guint16 l2_sublayer ;
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switch ( msg_type ) {
case MESSAGE_TYPE_ICRQ :
case MESSAGE_TYPE_OCRQ :
case MESSAGE_TYPE_ICCN :
case MESSAGE_TYPE_OCCN :
case MESSAGE_TYPE_ICRP :
case MESSAGE_TYPE_OCRP :
break ;
default :
return session ;
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}
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if ( session = = NULL )
session = alloc_session ( ) ;
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l2_sublayer = tvb_get_ntohs ( tvb , offset ) ;
switch ( l2_sublayer ) {
case 0x0000 :
result = L2TPv3_L2_SPECIFIC_NONE ; break ;
case 0x0001 :
result = L2TPv3_L2_SPECIFIC_DEFAULT ; break ;
case 0x0002 :
result = L2TPv3_L2_SPECIFIC_ATM ; break ;
case 0x0003 :
result = L2TPv3_L2_SPECIFIC_DOCSIS_DMPT ; break ;
default :
break ;
}
switch ( msg_type ) {
case MESSAGE_TYPE_ICRQ :
case MESSAGE_TYPE_OCRQ :
case MESSAGE_TYPE_ICCN :
case MESSAGE_TYPE_OCCN :
session - > lcce1 . l2_specific = result ;
case MESSAGE_TYPE_ICRP :
case MESSAGE_TYPE_OCRP :
session - > lcce2 . l2_specific = result ;
break ;
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}
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return session ;
}
static void update_session ( l2tpv3_tunnel_t * tunnel , l2tpv3_session_t * session )
{
l2tpv3_session_t * existing = NULL ;
if ( tunnel = = NULL | | session = = NULL )
return ;
if ( session - > lcce1 . id = = 0 & & session - > lcce2 . id = = 0 )
return ;
existing = find_session ( tunnel , session - > lcce1 . id , session - > lcce2 . id ) ;
if ( ! existing ) {
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existing = wmem_new0 ( wmem_file_scope ( ) , l2tpv3_session_t ) ;
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init_session ( existing ) ;
}
if ( session - > lcce1 . id ! = 0 )
existing - > lcce1 . id = session - > lcce1 . id ;
if ( session - > lcce2 . id ! = 0 )
existing - > lcce2 . id = session - > lcce2 . id ;
if ( session - > lcce1 . cookie_len ! = - 1 )
existing - > lcce1 . cookie_len = session - > lcce1 . cookie_len ;
if ( session - > lcce2 . cookie_len ! = - 1 )
existing - > lcce2 . cookie_len = session - > lcce2 . cookie_len ;
if ( session - > lcce1 . l2_specific ! = - 1 )
existing - > lcce1 . l2_specific = session - > lcce1 . l2_specific ;
if ( session - > lcce2 . l2_specific ! = - 1 )
existing - > lcce2 . l2_specific = session - > lcce2 . l2_specific ;
if ( session - > pw_type ! = - 1 )
existing - > pw_type = session - > pw_type ;
if ( tunnel - > sessions = = NULL ) {
tunnel - > sessions = g_slist_append ( tunnel - > sessions , existing ) ;
list_heads = g_slist_append ( list_heads , tunnel - > sessions ) ;
} else {
tunnel - > sessions = g_slist_append ( tunnel - > sessions , existing ) ;
}
}
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/*
* Dissect CISCO AVP : s
*/
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static int dissect_l2tp_cisco_avps ( tvbuff_t * tvb , packet_info * pinfo _U_ , proto_tree * tree ) {
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int offset = 0 ;
int avp_type ;
guint32 avp_vendor_id ;
guint16 avp_len ;
guint16 ver_len_hidden ;
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proto_tree * l2tp_avp_tree , * l2tp_avp_tree_sub ;
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ver_len_hidden = tvb_get_ntohs ( tvb , offset ) ;
avp_len = AVP_LENGTH ( ver_len_hidden ) ;
avp_vendor_id = tvb_get_ntohs ( tvb , offset + 2 ) ;
avp_type = tvb_get_ntohs ( tvb , offset + 4 ) ;
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l2tp_avp_tree = proto_tree_add_subtree_format ( tree , tvb , offset ,
avp_len , ett_l2tp_avp , NULL , " Vendor %s: %s AVP " ,
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val_to_str_ext ( avp_vendor_id , & sminmpec_values_ext , " Unknown (%u) " ) ,
val_to_str ( avp_type , cisco_avp_type_vals , " Unknown (%u) " ) ) ;
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_mandatory , tvb , offset , 2 , ENC_BIG_ENDIAN ) ;
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_hidden , tvb , offset , 2 , ENC_BIG_ENDIAN ) ;
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_length , tvb , offset , 2 , ENC_BIG_ENDIAN ) ;
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if ( HIDDEN_BIT ( ver_len_hidden ) ) { /* don't try do display hidden */
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offset + = avp_len ;
return offset ;
}
offset + = 2 ;
avp_len - = 2 ;
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proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_vendor_id , tvb , offset , 2 , ENC_BIG_ENDIAN ) ;
offset + = 2 ;
avp_len - = 2 ;
proto_tree_add_uint ( l2tp_avp_tree , hf_l2tp_cisco_avp_type , tvb , offset , 2 , avp_type ) ;
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offset + = 2 ;
avp_len - = 2 ;
switch ( avp_type ) {
case CISCO_ASSIGNED_CONNECTION_ID :
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proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_cisco_assigned_control_connection_id , tvb , offset , 4 , ENC_BIG_ENDIAN ) ;
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break ;
case CISCO_PW_CAPABILITY_LIST :
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l2tp_avp_tree_sub = proto_tree_add_subtree ( l2tp_avp_tree , tvb , offset , avp_len ,
ett_l2tp_avp_sub , NULL , " Pseudowire Capabilities List " ) ;
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while ( avp_len > = 2 ) {
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proto_tree_add_item ( l2tp_avp_tree_sub , hf_l2tp_cisco_pw_type , tvb , offset , 2 , ENC_BIG_ENDIAN ) ;
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offset + = 2 ;
avp_len - = 2 ;
}
break ;
case CISCO_LOCAL_SESSION_ID :
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_cisco_local_session_id , tvb , offset , 4 , ENC_BIG_ENDIAN ) ;
2012-09-07 10:27:38 +00:00
break ;
case CISCO_REMOTE_SESSION_ID :
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proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_cisco_remote_session_id , tvb , offset , 4 , ENC_BIG_ENDIAN ) ;
2012-09-07 10:27:38 +00:00
break ;
case CISCO_ASSIGNED_COOKIE :
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proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_cisco_assigned_cookie , tvb , offset , avp_len , ENC_NA ) ;
2012-09-07 10:27:38 +00:00
break ;
case CISCO_REMOTE_END_ID :
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_cisco_remote_end_id , tvb , offset , avp_len , ENC_NA | ENC_ASCII ) ;
2012-09-07 10:27:38 +00:00
break ;
case CISCO_PW_TYPE :
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proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_cisco_pseudowire_type , tvb , offset , 2 , ENC_BIG_ENDIAN ) ;
2012-09-07 10:27:38 +00:00
break ;
case CISCO_CIRCUIT_STATUS :
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proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_cisco_circuit_status , tvb , offset , 2 , ENC_BIG_ENDIAN ) ;
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_cisco_circuit_type , tvb , offset , 2 , ENC_BIG_ENDIAN ) ;
2012-09-07 10:27:38 +00:00
break ;
case CISCO_SESSION_TIE_BREAKER :
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proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_cisco_tie_breaker ,
2012-09-07 10:27:38 +00:00
tvb , offset , 8 , ENC_BIG_ENDIAN ) ;
break ;
case CISCO_DRAFT_AVP_VERSION :
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proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_cisco_draft_avp_version , tvb , offset , 2 , ENC_BIG_ENDIAN ) ;
2012-09-07 10:27:38 +00:00
break ;
case CISCO_MESSAGE_DIGEST :
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_cisco_message_digest , tvb , offset , avp_len , ENC_NA ) ;
2012-09-07 10:27:38 +00:00
break ;
case CISCO_AUTH_NONCE :
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proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_cisco_nonce , tvb , offset , avp_len , ENC_NA ) ;
2012-09-07 10:27:38 +00:00
break ;
case CISCO_INTERFACE_MTU :
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_cisco_interface_mtu , tvb , offset , avp_len , ENC_BIG_ENDIAN ) ;
2012-09-07 10:27:38 +00:00
break ;
default :
proto_tree_add_text ( l2tp_avp_tree , tvb , offset ,
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avp_len - 6 , " Vendor-Specific AVP data " ) ;
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break ;
}
offset + = avp_len ;
2013-09-11 21:06:34 +00:00
return offset ;
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}
2013-09-11 20:26:42 +00:00
/*
* Ref : http : //www.cablelabs.com/specifications/CM-SP-DEPI-I08-100611.pdf
2013-09-11 21:06:34 +00:00
*/
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static int
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dissect_l2tp_vnd_cablelabs_avps ( tvbuff_t * tvb , packet_info * pinfo _U_ , proto_tree * tree , void * data _U_ )
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{
int offset = 0 ;
int avp_type ;
guint32 avp_vendor_id ;
guint32 avp_len ;
guint16 ver_len_hidden ;
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proto_tree * l2tp_avp_tree ;
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ver_len_hidden = tvb_get_ntohs ( tvb , offset ) ;
avp_len = AVP_LENGTH ( ver_len_hidden ) ;
avp_vendor_id = tvb_get_ntohs ( tvb , offset + 2 ) ;
avp_type = tvb_get_ntohs ( tvb , offset + 4 ) ;
2014-06-29 21:00:12 +00:00
l2tp_avp_tree = proto_tree_add_subtree_format ( tree , tvb , offset ,
avp_len , ett_l2tp_avp , NULL , " Vendor %s: %s AVP " ,
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val_to_str_ext ( avp_vendor_id , & sminmpec_values_ext , " Unknown (%u) " ) ,
val_to_str ( avp_type , cablelabs_avp_type_vals , " Unknown (%u) " ) ) ;
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_mandatory , tvb , offset , 2 , ENC_BIG_ENDIAN ) ;
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_hidden , tvb , offset , 2 , ENC_BIG_ENDIAN ) ;
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_length , tvb , offset , 2 , ENC_BIG_ENDIAN ) ;
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if ( HIDDEN_BIT ( ver_len_hidden ) ) { /* don't try do display hidden */
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offset + = avp_len ;
return offset ;
}
offset + = 2 ;
avp_len - = 2 ;
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_vendor_id , tvb , offset , 2 , ENC_BIG_ENDIAN ) ;
offset + = 2 ;
avp_len - = 2 ;
proto_tree_add_uint ( l2tp_avp_tree , hf_l2tp_cablelabs_avp_type , tvb , offset , 2 , avp_type ) ;
offset + = 2 ;
avp_len - = 2 ;
switch ( avp_type ) {
case 101 :
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_cablel_avp_l_bit , tvb , offset , 2 , ENC_BIG_ENDIAN ) ;
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_cablel_avp_tsid_group_id , tvb , offset , 2 , ENC_BIG_ENDIAN ) ;
offset + = 2 ;
avp_len - = 2 ;
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_cablel_avp_frequency , tvb , offset , 4 , ENC_BIG_ENDIAN ) ;
avp_len - = 4 ;
offset + = 4 ;
break ;
case 103 :
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_cablel_avp_l_bit , tvb , offset , 2 , ENC_BIG_ENDIAN ) ;
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_cablel_avp_tsid_group_id , tvb , offset , 2 , ENC_BIG_ENDIAN ) ;
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_cablel_avp_modulation , tvb , offset , 2 , ENC_BIG_ENDIAN ) ;
offset + = 2 ;
avp_len - = 2 ;
break ;
case 105 :
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_cablel_avp_l_bit , tvb , offset , 2 , ENC_BIG_ENDIAN ) ;
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_cablel_avp_tsid_group_id , tvb , offset , 2 , ENC_BIG_ENDIAN ) ;
offset + = 2 ;
avp_len - = 2 ;
2013-09-11 21:06:34 +00:00
while ( avp_len > 0 ) {
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proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_cablel_avp_m , tvb , offset , 2 , ENC_BIG_ENDIAN ) ;
offset + = 2 ;
avp_len - = 2 ;
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_cablel_avp_n , tvb , offset , 2 , ENC_BIG_ENDIAN ) ;
offset + = 2 ;
avp_len - = 2 ;
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}
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break ;
default :
proto_tree_add_text ( l2tp_avp_tree , tvb , offset ,
avp_len , " Vendor-Specific AVP(not dissected yet) " ) ;
break ;
}
offset + = avp_len ;
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return offset ;
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}
2005-01-15 23:36:24 +00:00
/*
* Processes AVPs for Control Messages all versions and transports
*/
2005-01-09 21:42:39 +00:00
static void process_control_avps ( tvbuff_t * tvb ,
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packet_info * pinfo ,
proto_tree * l2tp_tree ,
int idx ,
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int length ,
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guint32 ccid ,
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l2tpv3_tunnel_t * tunnel )
2000-01-07 09:10:22 +00:00
{
2012-09-06 22:34:02 +00:00
proto_tree * l2tp_lcp_avp_tree , * l2tp_avp_tree = NULL , * l2tp_avp_tree_sub ;
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proto_item * tf , * te ;
2013-09-25 20:58:37 +00:00
int msg_type = 0 ;
gboolean isStopCcn = FALSE ;
int avp_type ;
guint32 avp_vendor_id ;
guint16 avp_len ;
guint16 ver_len_hidden ;
tvbuff_t * next_tvb , * avp_tvb ;
int digest_idx = 0 ;
guint16 digest_avp_len = 0 ;
proto_item * digest_item = NULL ;
l2tp_cntrl_data_t * l2tp_cntrl_data = wmem_new0 ( wmem_packet_scope ( ) , l2tp_cntrl_data_t ) ;
2012-05-15 19:23:35 +00:00
2012-09-11 13:06:42 +00:00
l2tpv3_session_t * session = NULL ;
2014-09-30 23:12:26 +00:00
l2tp_cntrl_data - > ccid = ccid ;
2013-09-25 20:58:37 +00:00
2012-05-15 19:23:35 +00:00
while ( idx < length ) { /* Process AVP's */
ver_len_hidden = tvb_get_ntohs ( tvb , idx ) ;
avp_len = AVP_LENGTH ( ver_len_hidden ) ;
avp_vendor_id = tvb_get_ntohs ( tvb , idx + 2 ) ;
avp_type = tvb_get_ntohs ( tvb , idx + 4 ) ;
2012-09-06 21:22:59 +00:00
if ( avp_len < 6 ) {
2012-09-07 10:27:38 +00:00
proto_tree_add_text ( l2tp_avp_tree ? l2tp_avp_tree : l2tp_tree , tvb , idx , 2 ,
" AVP length must be >= 6, got %u " , avp_len ) ;
2012-05-15 19:23:35 +00:00
return ;
}
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if ( avp_vendor_id ! = VENDOR_IETF ) {
2013-09-11 20:26:42 +00:00
2014-06-06 14:35:50 +00:00
avp_tvb = tvb_new_subset_length ( tvb , idx , avp_len ) ;
2013-09-11 20:26:42 +00:00
2012-09-07 10:27:38 +00:00
if ( avp_vendor_id = = VENDOR_CISCO ) { /* Vendor-Specific AVP */
dissect_l2tp_cisco_avps ( avp_tvb , pinfo , l2tp_tree ) ;
idx + = avp_len ;
continue ;
2012-11-29 20:15:37 +00:00
} else {
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/* Vendor-Specific AVP */
2013-09-25 20:58:37 +00:00
if ( ! dissector_try_uint_new ( l2tp_vendor_avp_dissector_table , avp_vendor_id , avp_tvb , pinfo , l2tp_tree , FALSE , l2tp_cntrl_data ) ) {
2014-06-29 21:00:12 +00:00
l2tp_avp_tree = proto_tree_add_subtree_format ( l2tp_tree , tvb , idx ,
avp_len , ett_l2tp_avp , NULL , " Vendor %s AVP Type %u " ,
2013-09-11 20:26:42 +00:00
val_to_str_ext ( avp_vendor_id , & sminmpec_values_ext , " Unknown (%u) " ) ,
avp_type ) ;
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_mandatory , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_hidden , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_length , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
if ( HIDDEN_BIT ( ver_len_hidden ) ) { /* don't try do display hidden */
idx + = avp_len ;
continue ;
}
idx + = 2 ;
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_vendor_id , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
idx + = 2 ;
proto_tree_add_text ( l2tp_avp_tree , tvb , idx , 2 , " Type: %u " , avp_type ) ;
idx + = 2 ;
2014-06-30 14:04:50 +00:00
proto_tree_add_text ( l2tp_avp_tree , tvb , idx , avp_len - 6 , " Vendor-Specific AVP data " ) ;
2013-09-11 21:06:34 +00:00
avp_len - = 6 ;
}
2012-09-07 10:27:38 +00:00
idx + = avp_len ;
continue ;
}
2012-05-15 19:23:35 +00:00
}
2012-09-07 10:27:38 +00:00
/* IETF AVP:s */
2014-06-29 21:00:12 +00:00
l2tp_avp_tree = proto_tree_add_subtree_format ( l2tp_tree , tvb , idx ,
avp_len , ett_l2tp_avp , NULL , " %s AVP " ,
2013-10-26 09:37:47 +00:00
val_to_str_ext ( avp_type , & avp_type_vals_ext , " Unknown (%u) " ) ) ;
2012-05-15 19:23:35 +00:00
2012-09-06 21:22:59 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_mandatory , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_hidden , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_length , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
2012-11-25 16:19:19 +00:00
if ( HIDDEN_BIT ( ver_len_hidden ) ) { /* don't try do display hidden */
2012-05-15 19:23:35 +00:00
idx + = avp_len ;
continue ;
}
idx + = 2 ;
avp_len - = 2 ;
/* Special Case for handling Extended Vendor Id */
if ( avp_type = = EXTENDED_VENDOR_ID ) {
idx + = 2 ;
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_vendor_id ,
tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
idx + = 4 ;
continue ;
}
else {
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_vendor_id ,
tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
idx + = 2 ;
avp_len - = 2 ;
}
proto_tree_add_uint ( l2tp_avp_tree , hf_l2tp_avp_type ,
tvb , idx , 2 , avp_type ) ;
idx + = 2 ;
avp_len - = 2 ;
switch ( avp_type ) {
case CONTROL_MESSAGE :
msg_type = tvb_get_ntohs ( tvb , idx ) ;
2013-09-25 20:58:37 +00:00
l2tp_cntrl_data - > msg_type = msg_type ;
2012-05-15 19:23:35 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_message_type ,
tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
if ( msg_type = = MESSAGE_TYPE_StopCCN ) {
isStopCcn = TRUE ;
}
break ;
case RESULT_ERROR_CODE :
if ( avp_len < 2 )
break ;
if ( isStopCcn ) {
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_stop_ccn_result_code , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
2012-05-15 19:23:35 +00:00
}
else {
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_result_code , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
2012-05-15 19:23:35 +00:00
}
idx + = 2 ;
avp_len - = 2 ;
if ( avp_len < 2 )
break ;
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_error_code , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
2012-05-15 19:23:35 +00:00
idx + = 2 ;
avp_len - = 2 ;
if ( avp_len = = 0 )
break ;
2014-04-06 14:57:33 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_error_message , tvb , idx , avp_len , ENC_ASCII | ENC_NA ) ;
2012-05-15 19:23:35 +00:00
break ;
case PROTOCOL_VERSION :
if ( avp_len < 1 )
break ;
2014-12-13 17:52:20 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_protocol_version , tvb , idx , 1 , ENC_BIG_ENDIAN ) ;
2012-05-15 19:23:35 +00:00
idx + = 1 ;
avp_len - = 1 ;
2014-12-13 17:52:20 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_protocol_revision , tvb , idx , 1 , ENC_BIG_ENDIAN ) ;
2012-05-15 19:23:35 +00:00
break ;
case FRAMING_CAPABILITIES :
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_async_framing_supported , tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_sync_framing_supported , tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
2012-05-15 19:23:35 +00:00
break ;
case BEARER_CAPABILITIES :
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_analog_access_supported , tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_digital_access_supported , tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
2012-05-15 19:23:35 +00:00
break ;
case TIE_BREAKER :
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_tie_breaker , tvb , idx , 8 , ENC_BIG_ENDIAN ) ;
break ;
case FIRMWARE_REVISION :
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_firmware_revision , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
2012-05-15 19:23:35 +00:00
break ;
case HOST_NAME :
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_host_name , tvb , idx , avp_len , ENC_NA | ENC_ASCII ) ;
2012-05-15 19:23:35 +00:00
break ;
case VENDOR_NAME :
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_vendor_name , tvb , idx , avp_len , ENC_NA | ENC_ASCII ) ;
2012-05-15 19:23:35 +00:00
break ;
case ASSIGNED_TUNNEL_ID :
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_assigned_tunnel_id , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
break ;
case RECEIVE_WINDOW_SIZE :
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_receive_window_size , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
2012-05-15 19:23:35 +00:00
break ;
case CHALLENGE :
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_chap_challenge , tvb , idx , avp_len , ENC_NA ) ;
2012-05-15 19:23:35 +00:00
break ;
case CAUSE_CODE :
/*
* XXX - export stuff from the Q .931 dissector
* to dissect the cause code and cause message ,
* and use it .
*/
if ( avp_len < 2 )
break ;
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_cause_code , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
2012-05-15 19:23:35 +00:00
idx + = 2 ;
avp_len - = 2 ;
if ( avp_len < 1 )
break ;
2014-12-13 17:52:20 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_cause_msg , tvb , idx , 1 , ENC_BIG_ENDIAN ) ;
2012-05-15 19:23:35 +00:00
idx + = 1 ;
avp_len - = 1 ;
if ( avp_len = = 0 )
break ;
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_advisory_msg , tvb , idx , avp_len , ENC_NA | ENC_ASCII ) ;
2012-05-15 19:23:35 +00:00
break ;
case CHALLENGE_RESPONSE :
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_chap_challenge_response , tvb , idx , 16 , ENC_NA ) ;
2012-05-15 19:23:35 +00:00
break ;
case ASSIGNED_SESSION :
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_assigned_session_id , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
break ;
case CALL_SERIAL_NUMBER :
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_call_serial_number , tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
2012-05-15 19:23:35 +00:00
break ;
case MINIMUM_BPS :
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_minimum_bps , tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
2012-05-15 19:23:35 +00:00
break ;
case MAXIMUM_BPS :
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_maximum_bps , tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
2012-05-15 19:23:35 +00:00
break ;
case BEARER_TYPE :
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_analog_bearer_type , tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_digital_bearer_type , tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
2012-05-15 19:23:35 +00:00
break ;
case FRAMING_TYPE :
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proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_async_framing_type , tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_sync_framing_type , tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
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break ;
case CALLED_NUMBER :
if ( avp_len = = 0 )
break ;
2012-11-25 16:19:19 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_called_number ,
2014-04-06 14:57:33 +00:00
tvb , idx , avp_len , ENC_ASCII | ENC_NA ) ;
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break ;
case CALLING_NUMBER :
if ( avp_len = = 0 )
break ;
2012-11-25 16:19:19 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_calling_number ,
2014-04-06 14:57:33 +00:00
tvb , idx , avp_len , ENC_ASCII | ENC_NA ) ;
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break ;
case SUB_ADDRESS :
if ( avp_len = = 0 )
break ;
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_sub_address , tvb , idx , avp_len , ENC_NA | ENC_ASCII ) ;
2012-05-15 19:23:35 +00:00
break ;
case TX_CONNECT_SPEED :
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proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_connect_speed , tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
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break ;
case PHYSICAL_CHANNEL :
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_physical_channel , tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
2012-05-15 19:23:35 +00:00
break ;
case INITIAL_RECEIVED_LCP_CONFREQ :
2013-07-18 02:42:06 +00:00
te = proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_initial_received_lcp_confreq , tvb , idx , avp_len , ENC_NA ) ;
2012-05-15 19:23:35 +00:00
l2tp_lcp_avp_tree = proto_item_add_subtree ( te , ett_l2tp_lcp ) ;
2014-06-06 14:35:50 +00:00
next_tvb = tvb_new_subset_length ( tvb , idx , avp_len ) ;
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call_dissector ( ppp_lcp_options_handle , next_tvb , pinfo , l2tp_lcp_avp_tree ) ;
break ;
case LAST_SENT_LCP_CONFREQ :
2013-07-18 02:42:06 +00:00
te = proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_last_sent_lcp_confreq , tvb , idx , avp_len , ENC_NA ) ;
2012-05-15 19:23:35 +00:00
l2tp_lcp_avp_tree = proto_item_add_subtree ( te , ett_l2tp_lcp ) ;
2014-06-06 14:35:50 +00:00
next_tvb = tvb_new_subset_length ( tvb , idx , avp_len ) ;
2012-05-15 19:23:35 +00:00
call_dissector ( ppp_lcp_options_handle , next_tvb , pinfo , l2tp_lcp_avp_tree ) ;
break ;
case LAST_RECEIVED_LCP_CONFREQ :
2013-07-18 02:42:06 +00:00
te = proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_last_received_lcp_confreq , tvb , idx , avp_len , ENC_NA ) ;
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l2tp_lcp_avp_tree = proto_item_add_subtree ( te , ett_l2tp_lcp ) ;
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next_tvb = tvb_new_subset_length ( tvb , idx , avp_len ) ;
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call_dissector ( ppp_lcp_options_handle , next_tvb , pinfo , l2tp_lcp_avp_tree ) ;
break ;
case PROXY_AUTHEN_TYPE :
msg_type = tvb_get_ntohs ( tvb , idx ) ;
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proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_proxy_authen_type , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
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break ;
case PROXY_AUTHEN_NAME :
if ( avp_len = = 0 )
break ;
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proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_proxy_authen_name , tvb , idx , avp_len , ENC_NA | ENC_ASCII ) ;
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break ;
case PROXY_AUTHEN_CHALLENGE :
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proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_proxy_authen_challenge , tvb , idx , avp_len , ENC_NA ) ;
2012-05-15 19:23:35 +00:00
break ;
case PROXY_AUTHEN_ID :
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proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_proxy_authen_id , tvb , idx + 1 , 1 , ENC_BIG_ENDIAN ) ;
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break ;
case PROXY_AUTHEN_RESPONSE :
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proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_proxy_authen_response , tvb , idx , avp_len , ENC_NA ) ;
2012-05-15 19:23:35 +00:00
break ;
case CALL_STATUS_AVPS :
if ( avp_len < 2 )
break ;
idx + = 2 ;
avp_len - = 2 ;
if ( avp_len < 4 )
break ;
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_crc_errors , tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
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idx + = 4 ;
avp_len - = 4 ;
if ( avp_len < 4 )
break ;
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_framing_errors , tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
2012-05-15 19:23:35 +00:00
idx + = 4 ;
avp_len - = 4 ;
if ( avp_len < 4 )
break ;
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_hardware_overruns , tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
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idx + = 4 ;
avp_len - = 4 ;
if ( avp_len < 4 )
break ;
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_buffer_overruns , tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
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idx + = 4 ;
avp_len - = 4 ;
if ( avp_len < 4 )
break ;
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_time_out_errors , tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
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idx + = 4 ;
avp_len - = 4 ;
if ( avp_len < 4 )
break ;
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_alignment_errors , tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
2012-05-15 19:23:35 +00:00
idx + = 4 ;
avp_len - = 4 ;
break ;
case ACCM :
if ( avp_len < 2 )
break ;
idx + = 2 ;
avp_len - = 2 ;
if ( avp_len < 4 )
break ;
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_send_accm , tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
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idx + = 4 ;
avp_len - = 4 ;
if ( avp_len < 4 )
break ;
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_receive_accm , tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
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idx + = 4 ;
avp_len - = 4 ;
break ;
case RANDOM_VECTOR :
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proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_random_vector , tvb , idx , avp_len , ENC_NA ) ;
2012-05-15 19:23:35 +00:00
break ;
case PRIVATE_GROUP_ID :
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proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_private_group_id , tvb , idx , avp_len , ENC_NA ) ;
2012-05-15 19:23:35 +00:00
break ;
case RX_CONNECT_SPEED :
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proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_rx_connect_speed , tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
2012-05-15 19:23:35 +00:00
break ;
case PPP_DISCONNECT_CAUSE_CODE :
if ( avp_len < 2 )
break ;
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_disconnect_code , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
2012-05-15 19:23:35 +00:00
idx + = 2 ;
avp_len - = 2 ;
if ( avp_len < 2 )
break ;
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_control_protocol_number , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
2012-05-15 19:23:35 +00:00
idx + = 2 ;
avp_len - = 2 ;
if ( avp_len < 1 )
break ;
2014-12-13 17:52:20 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_cause_code_direction , tvb , idx , 1 , ENC_BIG_ENDIAN ) ;
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idx + = 1 ;
avp_len - = 1 ;
if ( avp_len = = 0 )
break ;
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_cause_code_message , tvb , idx , avp_len , ENC_NA | ENC_ASCII ) ;
2012-05-15 19:23:35 +00:00
break ;
case MESSAGE_DIGEST :
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{
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digest_idx = idx ;
digest_avp_len = avp_len ;
2013-07-18 02:42:06 +00:00
digest_item = proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_message_digest , tvb , idx , avp_len , ENC_NA ) ;
2012-05-15 19:23:35 +00:00
break ;
2012-08-31 09:39:52 +00:00
}
2012-05-15 19:23:35 +00:00
case ROUTER_ID :
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proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_router_id , tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
2012-05-15 19:23:35 +00:00
break ;
case ASSIGNED_CONTROL_CONN_ID :
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_assigned_control_conn_id ,
tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
2012-09-06 08:03:15 +00:00
store_ccid ( tunnel , tvb , idx , msg_type ) ;
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break ;
case PW_CAPABILITY_LIST :
2014-06-29 21:00:12 +00:00
l2tp_avp_tree_sub = proto_tree_add_subtree ( l2tp_avp_tree , tvb , idx , avp_len ,
ett_l2tp_avp_sub , NULL , " Pseudowire Capabilities List " ) ;
2012-05-15 19:23:35 +00:00
while ( avp_len > = 2 ) {
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree_sub , hf_l2tp_avp_pw_type , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
2012-05-15 19:23:35 +00:00
idx + = 2 ;
avp_len - = 2 ;
}
break ;
case LOCAL_SESSION_ID :
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_local_session_id ,
tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
2012-09-10 08:26:22 +00:00
col_append_fstr ( pinfo - > cinfo , COL_INFO , " , LSID: %2u " ,
tvb_get_ntohl ( tvb , idx ) ) ;
2012-09-11 13:06:42 +00:00
session = store_lsession_id ( session , tvb , idx , msg_type ) ;
2012-05-15 19:23:35 +00:00
break ;
case REMOTE_SESSION_ID :
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_remote_session_id ,
tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
2012-09-10 08:26:22 +00:00
col_append_fstr ( pinfo - > cinfo , COL_INFO , " , RSID: %2u " ,
tvb_get_ntohl ( tvb , idx ) ) ;
2012-09-11 13:06:42 +00:00
session = store_rsession_id ( session , tvb , idx , msg_type ) ;
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break ;
case ASSIGNED_COOKIE :
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_assigned_cookie , tvb , idx , avp_len , ENC_NA ) ;
2012-09-11 13:06:42 +00:00
session = store_cookie_len ( session , avp_len , msg_type ) ;
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break ;
case REMOTE_END_ID :
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_remote_end_id , tvb , idx , avp_len , ENC_NA | ENC_ASCII ) ;
2012-05-15 19:23:35 +00:00
break ;
case PW_TYPE :
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proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_pseudowire_type , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
2012-09-11 13:06:42 +00:00
session = store_pw_type ( session , tvb , idx , msg_type ) ;
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break ;
case L2_SPECIFIC_SUBLAYER :
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_layer2_specific_sublayer , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
2012-09-11 13:06:42 +00:00
session = store_l2_sublayer ( session , tvb , idx , msg_type ) ;
2012-05-15 19:23:35 +00:00
break ;
case DATA_SEQUENCING :
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_data_sequencing , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
2012-05-15 19:23:35 +00:00
break ;
case CIRCUIT_STATUS :
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_circuit_status , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_circuit_type , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
2012-05-15 19:23:35 +00:00
break ;
case PREFERRED_LANGUAGE :
2013-07-18 02:42:06 +00:00
proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_preferred_language , tvb , idx , avp_len , ENC_NA | ENC_ASCII ) ;
2012-05-15 19:23:35 +00:00
break ;
case CTL_MSG_AUTH_NONCE :
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proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_nonce , tvb , idx , avp_len , ENC_NA ) ;
2012-09-06 08:03:15 +00:00
store_cma_nonce ( tunnel , tvb , idx , avp_len , msg_type ) ;
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break ;
case TX_CONNECT_SPEED_V3 :
{
2013-07-18 02:42:06 +00:00
guint64 speed ;
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if ( avp_len < 8 )
break ;
2013-07-18 02:42:06 +00:00
speed = tvb_get_ntoh64 ( tvb , idx ) ;
tf = proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_tx_connect_speed_v3 , tvb , idx , 8 , ENC_BIG_ENDIAN ) ;
if ( speed = = 0 ) {
proto_item_append_text ( tf , " (indeterminable or no physical p2p link) " ) ;
2012-05-15 19:23:35 +00:00
}
break ;
}
case RX_CONNECT_SPEED_V3 :
{
2013-07-18 02:42:06 +00:00
guint64 speed ;
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if ( avp_len < 8 )
break ;
2013-07-18 02:42:06 +00:00
speed = tvb_get_ntoh64 ( tvb , idx ) ;
tf = proto_tree_add_item ( l2tp_avp_tree , hf_l2tp_avp_rx_connect_speed_v3 , tvb , idx , 8 , ENC_BIG_ENDIAN ) ;
if ( speed = = 0 ) {
proto_item_append_text ( tf , " (indeterminable or no physical p2p link) " ) ;
2012-05-15 19:23:35 +00:00
}
break ;
}
default :
2014-06-30 14:04:50 +00:00
if ( avp_len > 0 )
proto_tree_add_text ( l2tp_avp_tree , tvb , idx , avp_len ,
" AVP data not dissected yet " ) ;
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break ;
}
idx + = avp_len ;
}
2005-01-09 21:42:39 +00:00
2012-09-06 08:03:15 +00:00
/* SCCRQ digest can only be calculated once we know whether nonces are being used */
if ( digest_avp_len ) {
if ( check_control_digest ( tunnel , tvb , length , digest_idx , digest_avp_len , msg_type , pinfo ) < 0 )
2013-05-27 17:30:43 +00:00
expert_add_info ( pinfo , digest_item , & ei_l2tp_incorrect_digest ) ;
2012-09-06 08:03:15 +00:00
}
2012-09-11 13:06:42 +00:00
update_session ( tunnel , session ) ;
2005-01-09 21:42:39 +00:00
}
2005-01-15 23:36:24 +00:00
/*
* Processes Data Messages for v3 IP and UDP , starting from the Session ID
* ( common to IP and UDP ) . Dissects the L2TPv3 Session header , the ( optional )
* L2 - Specific sublayer and calls the appropriate dissector for the payload .
*/
2005-01-09 21:42:39 +00:00
static void
process_l2tpv3_data ( tvbuff_t * tvb , packet_info * pinfo , proto_tree * tree ,
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proto_tree * l2tp_tree , proto_item * l2tp_item , int * pIdx ,
l2tpv3_tunnel_t * tunnel )
2005-01-09 21:42:39 +00:00
{
2012-05-15 19:23:35 +00:00
int idx = * pIdx ;
int sid ;
guint8 oam_cell = 0 ;
proto_tree * l2_specific = NULL ;
proto_item * ti = NULL ;
tvbuff_t * next_tvb ;
2012-09-11 13:06:42 +00:00
gint cookie_len = l2tpv3_cookie ;
gint l2_spec = l2tpv3_l2_specific ;
gint pw_type = l2tpv3_protocol ;
lcce_settings_t * lcce = NULL ;
l2tpv3_session_t * session = NULL ;
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/* Get Session ID */
sid = tvb_get_ntohl ( tvb , idx ) ;
idx + = 4 ;
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if ( tunnel ) {
if ( ADDRESSES_EQUAL ( & tunnel - > lcce1 , & pinfo - > dst ) ) {
session = find_session ( tunnel , sid , 0 ) ;
if ( session )
lcce = & session - > lcce1 ;
} else {
session = find_session ( tunnel , 0 , sid ) ;
if ( session )
lcce = & session - > lcce2 ;
}
}
if ( lcce ) {
if ( l2_spec = = - 1 )
l2_spec = lcce - > l2_specific ;
if ( cookie_len = = - 1 )
cookie_len = lcce - > cookie_len ;
if ( pw_type = = - 1 )
pw_type = session - > pw_type ;
}
if ( l2_spec = = - 1 )
l2_spec = L2TPv3_L2_SPECIFIC_NONE ;
if ( pw_type = = - 1 )
pw_type = L2TPv3_PROTOCOL_DEFAULT ;
if ( cookie_len = = - 1 )
cookie_len = L2TPv3_COOKIE_DEFAULT ;
2013-06-14 17:49:53 +00:00
col_add_fstr ( pinfo - > cinfo , COL_INFO ,
" %s (session id=%u) " ,
data_msg , sid ) ;
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if ( tree ) {
proto_tree_add_item ( l2tp_tree , hf_l2tp_sid , tvb , idx - 4 , 4 , ENC_BIG_ENDIAN ) ;
proto_item_set_len ( l2tp_item , idx ) ;
if ( ! ( tvb_offset_exists ( tvb , idx ) ) )
return ;
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if ( cookie_len ! = 0 )
proto_tree_add_item ( l2tp_tree , hf_l2tp_cookie , tvb , idx , cookie_len , ENC_NA ) ;
2012-05-15 19:23:35 +00:00
}
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switch ( l2_spec ) {
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case L2TPv3_L2_SPECIFIC_DEFAULT :
if ( tree ) {
ti = proto_tree_add_item ( tree , hf_l2tp_l2_spec_def ,
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tvb , idx + cookie_len , 4 , ENC_NA ) ;
2012-05-15 19:23:35 +00:00
l2_specific = proto_item_add_subtree ( ti , ett_l2tp_l2_spec ) ;
2012-09-11 13:06:42 +00:00
proto_tree_add_item ( l2_specific , hf_l2tp_l2_spec_s , tvb , idx + cookie_len ,
2012-05-15 19:23:35 +00:00
1 , ENC_BIG_ENDIAN ) ;
proto_tree_add_item ( l2_specific , hf_l2tp_l2_spec_sequence , tvb ,
2012-09-11 13:06:42 +00:00
idx + cookie_len + 1 , 3 , ENC_BIG_ENDIAN ) ;
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}
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next_tvb = tvb_new_subset_remaining ( tvb , idx + cookie_len + 4 ) ;
2012-05-15 19:23:35 +00:00
break ;
case L2TPv3_L2_SPECIFIC_DOCSIS_DMPT :
if ( tree ) {
ti = proto_tree_add_item ( tree , hf_l2tp_l2_spec_docsis_dmpt ,
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tvb , idx + cookie_len , 4 , ENC_NA ) ;
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l2_specific = proto_item_add_subtree ( ti , ett_l2tp_l2_spec ) ;
proto_tree_add_item ( l2_specific , hf_l2tp_l2_spec_v , tvb ,
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idx + cookie_len , 1 , ENC_BIG_ENDIAN ) ;
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proto_tree_add_item ( l2_specific , hf_l2tp_l2_spec_s , tvb ,
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idx + cookie_len , 1 , ENC_BIG_ENDIAN ) ;
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2014-12-02 21:18:55 +00:00
proto_tree_add_item ( l2_specific , hf_l2tp_l2_spec_h , tvb ,
idx + cookie_len , 1 , ENC_BIG_ENDIAN ) ;
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proto_tree_add_item ( l2_specific , hf_l2tp_l2_spec_flow_id , tvb ,
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idx + cookie_len , 1 , ENC_BIG_ENDIAN ) ;
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proto_tree_add_item ( l2_specific , hf_l2tp_l2_spec_sequence , tvb ,
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idx + cookie_len + 2 , 2 , ENC_BIG_ENDIAN ) ;
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}
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next_tvb = tvb_new_subset_remaining ( tvb , idx + cookie_len + 4 ) ;
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break ;
case L2TPv3_L2_SPECIFIC_ATM :
if ( tree ) {
ti = proto_tree_add_item ( tree , hf_l2tp_l2_spec_atm ,
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tvb , idx + cookie_len , 4 , ENC_NA ) ;
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l2_specific = proto_item_add_subtree ( ti , ett_l2tp_l2_spec ) ;
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proto_tree_add_item ( l2_specific , hf_l2tp_l2_spec_s , tvb , idx + cookie_len ,
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1 , ENC_BIG_ENDIAN ) ;
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proto_tree_add_item ( l2_specific , hf_l2tp_l2_spec_t , tvb , idx + cookie_len ,
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1 , ENC_BIG_ENDIAN ) ;
/*
* As per RFC 4454 , the T bit specifies whether
* we ' re transporting an OAM cell or an AAL5 frame .
*/
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oam_cell = tvb_get_guint8 ( tvb , idx + cookie_len ) & 0x08 ;
proto_tree_add_item ( l2_specific , hf_l2tp_l2_spec_g , tvb , idx + cookie_len ,
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1 , ENC_BIG_ENDIAN ) ;
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proto_tree_add_item ( l2_specific , hf_l2tp_l2_spec_c , tvb , idx + cookie_len ,
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1 , ENC_BIG_ENDIAN ) ;
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proto_tree_add_item ( l2_specific , hf_l2tp_l2_spec_u , tvb , idx + cookie_len ,
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1 , ENC_BIG_ENDIAN ) ;
proto_tree_add_item ( l2_specific , hf_l2tp_l2_spec_sequence , tvb ,
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idx + cookie_len + 1 , 3 , ENC_BIG_ENDIAN ) ;
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}
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next_tvb = tvb_new_subset_remaining ( tvb , idx + cookie_len + 4 ) ;
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break ;
case L2TPv3_L2_SPECIFIC_LAPD :
if ( tree )
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proto_tree_add_text ( tree , tvb , idx + cookie_len + 4 , 3 , " LAPD info " ) ;
next_tvb = tvb_new_subset_remaining ( tvb , idx + cookie_len + 4 + 3 ) ;
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break ;
case L2TPv3_L2_SPECIFIC_NONE :
default :
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next_tvb = tvb_new_subset_remaining ( tvb , idx + cookie_len ) ;
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break ;
}
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switch ( pw_type ) {
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case L2TPv3_PROTOCOL_ETH :
call_dissector ( eth_withoutfcs_handle , next_tvb , pinfo , tree ) ;
break ;
case L2TPv3_PROTOCOL_CHDLC :
call_dissector ( chdlc_handle , next_tvb , pinfo , tree ) ;
break ;
case L2TPv3_PROTOCOL_FR :
call_dissector ( fr_handle , next_tvb , pinfo , tree ) ;
break ;
case L2TPv3_PROTOCOL_PPP :
/*
* PPP is transported without Address and Control
* fields , ppp_hdlc_handle can handle that as if if
* was ACFC ( NULL Address and Control )
*/
call_dissector ( ppp_hdlc_handle , next_tvb , pinfo , tree ) ;
break ;
case L2TPv3_PROTOCOL_IP :
call_dissector ( ip_handle , next_tvb , pinfo , tree ) ;
break ;
case L2TPv3_PROTOCOL_MPLS :
call_dissector ( mpls_handle , next_tvb , pinfo , tree ) ;
break ;
case L2TPv3_PROTOCOL_DOCSIS_DMPT :
call_dissector ( mp2t_handle , next_tvb , pinfo , tree ) ;
break ;
case L2TPv3_PROTOCOL_AAL5 :
if ( oam_cell ) {
call_dissector ( atm_oam_handle , next_tvb , pinfo , tree ) ;
} else {
call_dissector ( llc_handle , next_tvb , pinfo , tree ) ;
}
break ;
case L2TPv3_PROTOCOL_LAPD :
call_dissector ( lapd_handle , next_tvb , pinfo , tree ) ;
break ;
case L2TPv3_PROTOCOL_ERICSSON :
call_dissector ( ehdlc_handle , next_tvb , pinfo , tree ) ;
break ;
default :
call_dissector ( data_handle , next_tvb , pinfo , tree ) ;
break ;
}
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}
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/*
* Processes v3 data message over UDP , to then call process_l2tpv3_data
* from the common part ( Session ID )
*/
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static void
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process_l2tpv3_data_udp ( tvbuff_t * tvb , packet_info * pinfo , proto_tree * tree ,
l2tpv3_conversation_t * l2tp_conv )
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{
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proto_tree * l2tp_tree , * ctrl_tree ;
proto_item * l2tp_item ;
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int idx = 0 ;
int control ;
int sid ;
control = tvb_get_ntohs ( tvb , idx ) ;
idx + = 2 ; /* skip ahead */
idx + = 2 ; /* Skip the reserved */
sid = tvb_get_ntohl ( tvb , idx ) ;
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l2tp_item = proto_tree_add_item ( tree , proto_l2tp , tvb , 0 , - 1 , ENC_NA ) ;
l2tp_tree = proto_item_add_subtree ( l2tp_item , ett_l2tp ) ;
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if ( tree ) {
proto_item_append_text ( l2tp_item , " version 3 " ) ;
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ctrl_tree = proto_tree_add_subtree_format ( l2tp_tree , tvb , 0 , 2 ,
ett_l2tp_ctrl , NULL , " Packet Type: %s Session Id=%u " ,
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data_msg , sid ) ;
proto_tree_add_uint ( ctrl_tree , hf_l2tp_type , tvb , 0 , 2 , control ) ;
proto_tree_add_boolean ( ctrl_tree , hf_l2tp_length_bit , tvb , 0 , 2 , control ) ;
proto_tree_add_boolean ( ctrl_tree , hf_l2tp_seq_bit , tvb , 0 , 2 , control ) ;
proto_tree_add_uint ( ctrl_tree , hf_l2tp_version , tvb , 0 , 2 , control ) ;
/* Data in v3 over UDP has this reserved */
proto_tree_add_item ( l2tp_tree , hf_l2tp_res , tvb , 2 , 2 , ENC_BIG_ENDIAN ) ;
}
/* Call process_l2tpv3_data from Session ID (offset in idx of 4) */
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process_l2tpv3_data ( tvb , pinfo , tree , l2tp_tree , l2tp_item , & idx , l2tp_conv - > tunnel ) ;
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}
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/*
* Processes v3 data message over IP , to then call process_l2tpv3_data
* from the common part ( Session ID )
*/
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static void
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process_l2tpv3_data_ip ( tvbuff_t * tvb , packet_info * pinfo , proto_tree * tree ,
l2tpv3_conversation_t * l2tp_conv )
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{
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proto_tree * l2tp_tree = NULL ;
proto_item * l2tp_item = NULL ;
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int idx = 0 ;
int sid ;
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sid = tvb_get_ntohl ( tvb , idx ) ;
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if ( tree ) {
l2tp_item = proto_tree_add_item ( tree , proto_l2tp , tvb , 0 , - 1 , ENC_NA ) ;
l2tp_tree = proto_item_add_subtree ( l2tp_item , ett_l2tp ) ;
proto_item_append_text ( l2tp_item , " version 3 " ) ;
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2012-05-15 19:23:35 +00:00
proto_tree_add_text ( l2tp_tree , tvb , 0 , 4 ,
" Packet Type: %s Session Id=%u " ,
data_msg , sid ) ;
}
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2012-05-15 19:23:35 +00:00
/* Call process_l2tpv3_data from Session ID (offset in idx of 0) */
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process_l2tpv3_data ( tvb , pinfo , tree , l2tp_tree , l2tp_item , & idx , l2tp_conv - > tunnel ) ;
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}
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/*
* Processes v3 Control Message over IP , that carries NULL Session ID
* to then call process_control_avps after dissecting the control .
*/
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static void
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process_l2tpv3_control ( tvbuff_t * tvb , packet_info * pinfo , proto_tree * tree , int baseIdx ,
l2tpv3_conversation_t * l2tp_conv )
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{
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proto_tree * l2tp_tree = NULL , * ctrl_tree ;
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proto_item * l2tp_item = NULL ;
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int idx = baseIdx ;
int tmp_idx ;
guint16 length = 0 ; /* Length field */
guint32 ccid = 0 ; /* Control Connection ID */
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guint16 vendor_id = 0 ;
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guint16 avp_type ;
guint16 msg_type ;
guint16 control = 0 ;
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l2tpv3_tunnel_t * tunnel = NULL ;
l2tpv3_tunnel_t tmp_tunnel ;
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control = tvb_get_ntohs ( tvb , idx ) ;
idx + = 2 ; /* skip ahead */
if ( LENGTH_BIT ( control ) ) { /* length field included ? */
length = tvb_get_ntohs ( tvb , idx ) ;
idx + = 2 ;
}
/* Get Control Channel ID */
ccid = tvb_get_ntohl ( tvb , idx ) ;
idx + = 4 ;
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tmp_idx = idx ;
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2013-06-14 17:49:53 +00:00
if ( ( LENGTH_BIT ( control ) ) & & ( length = = 12 ) ) /* ZLB Message */
col_add_fstr ( pinfo - > cinfo , COL_INFO ,
" %s - ZLB (tunnel id=%u) " ,
control_msg , ccid ) ;
else
{
if ( SEQUENCE_BIT ( control ) ) {
tmp_idx + = 4 ;
}
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2013-09-25 20:58:37 +00:00
tmp_idx + = 2 ;
vendor_id = tvb_get_ntohs ( tvb , tmp_idx ) ;
tmp_idx + = 2 ;
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2013-06-14 17:49:53 +00:00
avp_type = tvb_get_ntohs ( tvb , tmp_idx ) ;
tmp_idx + = 2 ;
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2013-09-25 20:58:37 +00:00
/* If it's a vendor AVP let the vendor AVP dissector fill in the info column */
if ( vendor_id = = VENDOR_IETF ) {
if ( avp_type = = CONTROL_MESSAGE ) {
/* We print message type */
msg_type = tvb_get_ntohs ( tvb , tmp_idx ) ;
col_add_fstr ( pinfo - > cinfo , COL_INFO ,
" %s - %s (tunnel id=%u) " ,
control_msg ,
2013-10-26 09:37:47 +00:00
val_to_str_ext ( msg_type , & l2tp_message_type_short_str_vals_ext , " Unknown (%u) " ) ,
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ccid ) ;
}
else {
/*
* This is not a control message .
* We never pass here except in case of bad l2tp packet !
*/
col_add_fstr ( pinfo - > cinfo , COL_INFO ,
" %s (tunnel id=%u) " ,
control_msg , ccid ) ;
}
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}
}
if ( LENGTH_BIT ( control ) ) {
/*
* Set the length of this tvbuff to be no longer than the length
* in the header .
*
* XXX - complain if that length is longer than the length of
* the tvbuff ? Have " set_actual_length() " return a Boolean
* and have its callers check the result ?
*/
set_actual_length ( tvb , length + baseIdx ) ;
}
if ( tree ) {
l2tp_item = proto_tree_add_item ( tree , proto_l2tp , tvb , 0 , - 1 , ENC_NA ) ;
l2tp_tree = proto_item_add_subtree ( l2tp_item , ett_l2tp ) ;
proto_item_append_text ( l2tp_item , " version 3 " ) ;
if ( baseIdx ) {
proto_tree_add_item ( l2tp_tree , hf_l2tp_sid , tvb , 0 , 4 , ENC_BIG_ENDIAN ) ;
}
2014-06-29 21:00:12 +00:00
ctrl_tree = proto_tree_add_subtree_format ( l2tp_tree , tvb , baseIdx , 2 ,
ett_l2tp_ctrl , NULL , " Packet Type: %s Control Connection Id=%d " ,
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( CONTROL_BIT ( control ) ? control_msg : data_msg ) , ccid ) ;
proto_tree_add_uint ( ctrl_tree , hf_l2tp_type , tvb , baseIdx , 2 , control ) ;
proto_tree_add_boolean ( ctrl_tree , hf_l2tp_length_bit , tvb , baseIdx , 2 , control ) ;
proto_tree_add_boolean ( ctrl_tree , hf_l2tp_seq_bit , tvb , baseIdx , 2 , control ) ;
proto_tree_add_uint ( ctrl_tree , hf_l2tp_version , tvb , baseIdx , 2 , control ) ;
}
idx = baseIdx + 2 ;
if ( LENGTH_BIT ( control ) ) {
2014-06-29 21:00:12 +00:00
proto_tree_add_item ( l2tp_tree , hf_l2tp_length , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
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idx + = 2 ;
}
2014-06-29 21:00:12 +00:00
proto_tree_add_item ( l2tp_tree , hf_l2tp_ccid , tvb , idx , 4 , ENC_BIG_ENDIAN ) ;
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idx + = 4 ;
if ( SEQUENCE_BIT ( control ) ) {
2014-06-29 21:00:12 +00:00
proto_tree_add_item ( l2tp_tree , hf_l2tp_Ns , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
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idx + = 2 ;
2014-06-29 21:00:12 +00:00
proto_tree_add_item ( l2tp_tree , hf_l2tp_Nr , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
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idx + = 2 ;
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2012-05-15 19:23:35 +00:00
}
if ( tree & & ( LENGTH_BIT ( control ) ) & & ( length = = 12 ) ) {
proto_tree_add_text ( l2tp_tree , tvb , 0 , 0 , " Zero Length Bit message " ) ;
2012-09-06 08:03:15 +00:00
} else {
avp_type = tvb_get_ntohs ( tvb , idx + 4 ) ;
if ( avp_type = = CONTROL_MESSAGE ) {
msg_type = tvb_get_ntohs ( tvb , idx + 6 ) ;
if ( msg_type = = MESSAGE_TYPE_SCCRQ ) {
tunnel = & tmp_tunnel ;
memset ( tunnel , 0 , sizeof ( l2tpv3_tunnel_t ) ) ;
tunnel - > conv = l2tp_conv ;
2015-01-12 02:32:53 +00:00
WMEM_COPY_ADDRESS ( wmem_file_scope ( ) , & tunnel - > lcce1 , & pinfo - > src ) ;
WMEM_COPY_ADDRESS ( wmem_file_scope ( ) , & tunnel - > lcce2 , & pinfo - > dst ) ;
2012-09-06 08:03:15 +00:00
}
}
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}
if ( ! LENGTH_BIT ( control ) ) {
return ;
}
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if ( tunnel = = NULL ) {
2012-09-11 13:06:42 +00:00
tunnel = l2tp_conv - > tunnel ;
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}
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process_control_avps ( tvb , pinfo , l2tp_tree , idx , length + baseIdx , ccid , tunnel ) ;
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2012-09-11 13:06:42 +00:00
if ( tunnel = = & tmp_tunnel & & l2tp_conv - > tunnel = = NULL ) {
2013-09-15 13:46:13 +00:00
l2tp_conv - > tunnel = wmem_new0 ( wmem_file_scope ( ) , l2tpv3_tunnel_t ) ;
2012-09-11 13:06:42 +00:00
memcpy ( l2tp_conv - > tunnel , & tmp_tunnel , sizeof ( l2tpv3_tunnel_t ) ) ;
2012-09-06 08:03:15 +00:00
}
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}
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/*
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* Dissector for L2TP over UDP . For v2 , calls process_control_avps for
2005-01-15 23:36:24 +00:00
* control messages , or the ppp dissector based on the control bit .
* For v3 , calls either process_l2tpv3_control or process_l2tpv3_data_udp
* based on the control bit .
*/
2005-01-29 23:45:53 +00:00
static int
2012-09-10 21:40:21 +00:00
dissect_l2tp_udp ( tvbuff_t * tvb , packet_info * pinfo , proto_tree * tree , void * data _U_ )
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{
2014-06-29 21:00:12 +00:00
proto_tree * l2tp_tree , * ctrl_tree ;
proto_item * l2tp_item ;
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int idx = 0 ;
int tmp_idx ;
guint16 length = 0 ; /* Length field */
guint16 tid ; /* Tunnel ID */
guint16 cid ; /* Call ID */
guint16 offset_size ; /* Offset size */
guint16 avp_type ;
guint16 msg_type ;
guint16 control ;
tvbuff_t * next_tvb ;
2012-09-06 08:03:15 +00:00
conversation_t * conv = NULL ;
l2tpv3_conversation_t * l2tp_conv = NULL ;
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/*
* Don ' t accept packets that aren ' t for an L2TP version we know ,
* as they might not be L2TP packets even though they happen
* to be coming from or going to the L2TP port .
*/
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if ( tvb_captured_length ( tvb ) < 2 )
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return 0 ; /* not enough information to check */
control = tvb_get_ntohs ( tvb , 0 ) ;
switch ( L2TP_VERSION ( control ) ) {
case 2 :
case 3 :
break ;
default :
return 0 ;
}
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conv = find_conversation ( pinfo - > fd - > num , & pinfo - > src , & pinfo - > dst , PT_UDP ,
2012-08-31 09:39:52 +00:00
pinfo - > srcport , pinfo - > destport , NO_PORT_B ) ;
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if ( conv = = NULL ) {
conv = find_conversation ( pinfo - > fd - > num , & pinfo - > src , & pinfo - > dst , PT_UDP ,
2012-08-31 09:39:52 +00:00
pinfo - > srcport , pinfo - > destport , 0 ) ;
}
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if ( ( conv = = NULL ) | | ( conv - > dissector_handle ! = l2tp_udp_handle ) ) {
conv = conversation_new ( pinfo - > fd - > num , & pinfo - > src , & pinfo - > dst , PT_UDP ,
2012-08-31 09:39:52 +00:00
pinfo - > srcport , 0 , NO_PORT2 ) ;
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conversation_set_dissector ( conv , l2tp_udp_handle ) ;
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}
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col_set_str ( pinfo - > cinfo , COL_PROTOCOL , " L2TP " ) ;
col_clear ( pinfo - > cinfo , COL_INFO ) ;
switch ( L2TP_VERSION ( control ) ) {
case 2 :
break ;
case 3 :
2012-09-06 08:03:15 +00:00
l2tp_conv = ( l2tpv3_conversation_t * ) conversation_get_proto_data ( conv , proto_l2tp ) ;
if ( ! l2tp_conv ) {
2013-09-15 13:46:13 +00:00
l2tp_conv = wmem_new0 ( wmem_file_scope ( ) , l2tpv3_conversation_t ) ;
2012-09-06 08:03:15 +00:00
l2tp_conv - > pt = PT_UDP ;
conversation_add_proto_data ( conv , proto_l2tp , ( void * ) l2tp_conv ) ;
}
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col_set_str ( pinfo - > cinfo , COL_PROTOCOL , " L2TPv3 " ) ;
if ( CONTROL_BIT ( control ) ) {
/* Call to process l2tp v3 control message */
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process_l2tpv3_control ( tvb , pinfo , tree , 0 , l2tp_conv ) ;
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}
else {
/* Call to process l2tp v3 data message */
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process_l2tpv3_data_udp ( tvb , pinfo , tree , l2tp_conv ) ;
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}
2014-11-20 15:07:55 +00:00
return tvb_reported_length ( tvb ) ;
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}
if ( LENGTH_BIT ( control ) ) { /* length field included ? */
idx + = 2 ; /* skip ahead */
length = tvb_get_ntohs ( tvb , idx ) ;
}
/* collect the tunnel id & call id */
idx + = 2 ;
tid = tvb_get_ntohs ( tvb , idx ) ;
idx + = 2 ;
cid = tvb_get_ntohs ( tvb , idx ) ;
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if ( CONTROL_BIT ( control ) ) {
/* CONTROL MESSAGE */
tmp_idx = idx ;
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if ( ( LENGTH_BIT ( control ) ) & & ( length = = 12 ) ) /* ZLB Message */
col_add_fstr ( pinfo - > cinfo , COL_INFO ,
" %s - ZLB (tunnel id=%d, session id=%u) " ,
control_msg , tid , cid ) ;
else
{
if ( SEQUENCE_BIT ( control ) ) {
tmp_idx + = 4 ;
}
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tmp_idx + = 4 ;
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avp_type = tvb_get_ntohs ( tvb , ( tmp_idx + = 2 ) ) ;
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if ( avp_type = = CONTROL_MESSAGE ) {
/* We print message type */
msg_type = tvb_get_ntohs ( tvb , tmp_idx + 2 ) ;
col_add_fstr ( pinfo - > cinfo , COL_INFO ,
" %s - %s (tunnel id=%u, session id=%u) " ,
control_msg ,
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val_to_str_ext ( msg_type , & l2tp_message_type_short_str_vals_ext , " Unknown (%u) " ) ,
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tid , cid ) ;
}
else
{
/*
* This is not a control message .
* We never pass here except in case of bad l2tp packet !
*/
col_add_fstr ( pinfo - > cinfo , COL_INFO ,
" %s (tunnel id=%u, session id=%u) " ,
control_msg , tid , cid ) ;
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}
}
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}
else {
/* DATA Message */
col_add_fstr ( pinfo - > cinfo , COL_INFO ,
" %s (tunnel id=%u, session id=%u) " ,
data_msg , tid , cid ) ;
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}
if ( LENGTH_BIT ( control ) ) {
/*
* Set the length of this tvbuff to be no longer than the length
* in the header .
*
* XXX - complain if that length is longer than the length of
* the tvbuff ? Have " set_actual_length() " return a Boolean
* and have its callers check the result ?
*/
set_actual_length ( tvb , length ) ;
}
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l2tp_item = proto_tree_add_item ( tree , proto_l2tp , tvb , 0 , - 1 , ENC_NA ) ;
l2tp_tree = proto_item_add_subtree ( l2tp_item , ett_l2tp ) ;
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if ( tree ) {
ctrl_tree = proto_tree_add_subtree_format ( l2tp_tree , tvb , 0 , 2 , ett_l2tp_ctrl , NULL ,
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" Packet Type: %s Tunnel Id=%d Session Id=%d " ,
( CONTROL_BIT ( control ) ? control_msg : data_msg ) , tid , cid ) ;
proto_tree_add_uint ( ctrl_tree , hf_l2tp_type , tvb , 0 , 2 , control ) ;
proto_tree_add_boolean ( ctrl_tree , hf_l2tp_length_bit , tvb , 0 , 2 , control ) ;
proto_tree_add_boolean ( ctrl_tree , hf_l2tp_seq_bit , tvb , 0 , 2 , control ) ;
proto_tree_add_boolean ( ctrl_tree , hf_l2tp_offset_bit , tvb , 0 , 2 , control ) ;
proto_tree_add_boolean ( ctrl_tree , hf_l2tp_priority , tvb , 0 , 2 , control ) ;
proto_tree_add_uint ( ctrl_tree , hf_l2tp_version , tvb , 0 , 2 , control ) ;
}
idx = 2 ;
if ( LENGTH_BIT ( control ) ) {
if ( tree ) {
proto_tree_add_item ( l2tp_tree , hf_l2tp_length , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
}
idx + = 2 ;
}
if ( tree ) {
proto_tree_add_item ( l2tp_tree , hf_l2tp_tunnel , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
}
idx + = 2 ;
if ( tree ) {
proto_tree_add_item ( l2tp_tree , hf_l2tp_session , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
}
idx + = 2 ;
if ( SEQUENCE_BIT ( control ) ) {
if ( tree ) {
proto_tree_add_item ( l2tp_tree , hf_l2tp_Ns , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
}
idx + = 2 ;
if ( tree ) {
proto_tree_add_item ( l2tp_tree , hf_l2tp_Nr , tvb , idx , 2 , ENC_BIG_ENDIAN ) ;
}
idx + = 2 ;
}
if ( OFFSET_BIT ( control ) ) {
offset_size = tvb_get_ntohs ( tvb , idx ) ;
if ( tree ) {
proto_tree_add_uint ( l2tp_tree , hf_l2tp_offset , tvb , idx , 2 ,
offset_size ) ;
}
idx + = 2 ;
if ( offset_size ! = 0 ) {
if ( tree ) {
proto_tree_add_text ( l2tp_tree , tvb , idx , offset_size , " Offset Padding " ) ;
}
idx + = offset_size ;
}
}
if ( tree & & ( LENGTH_BIT ( control ) ) & & ( length = = 12 ) ) {
proto_tree_add_text ( l2tp_tree , tvb , 0 , 0 , " Zero Length Bit message " ) ;
}
if ( ! CONTROL_BIT ( control ) ) { /* Data Messages so we are done */
if ( tree )
proto_item_set_len ( l2tp_item , idx ) ;
/* If we have data, signified by having a length bit, dissect it */
if ( tvb_offset_exists ( tvb , idx ) ) {
next_tvb = tvb_new_subset_remaining ( tvb , idx ) ;
call_dissector ( ppp_hdlc_handle , next_tvb , pinfo , tree ) ;
}
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return tvb_reported_length ( tvb ) ;
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}
if ( LENGTH_BIT ( control ) )
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process_control_avps ( tvb , pinfo , l2tp_tree , idx , length , - 1 , NULL ) ;
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return tvb_reported_length ( tvb ) ;
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}
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/*
* Only L2TPv3 runs directly over IP , and dissect_l2tp_ip starts dissecting
* those packets to call either process_l2tpv3_control for Control Messages
* or process_l2tpv3_data_ip for Data Messages over IP , based on the
* Session ID
*/
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static void
dissect_l2tp_ip ( tvbuff_t * tvb , packet_info * pinfo , proto_tree * tree )
{
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int idx = 0 ;
guint32 sid ; /* Session ID */
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conversation_t * conv = NULL ;
l2tpv3_conversation_t * l2tp_conv = NULL ;
conv = find_or_create_conversation ( pinfo ) ;
l2tp_conv = ( l2tpv3_conversation_t * ) conversation_get_proto_data ( conv , proto_l2tp ) ;
if ( ! l2tp_conv ) {
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l2tp_conv = wmem_new0 ( wmem_file_scope ( ) , l2tpv3_conversation_t ) ;
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l2tp_conv - > pt = PT_NONE ;
conversation_add_proto_data ( conv , proto_l2tp , ( void * ) l2tp_conv ) ;
}
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/* Only L2TPv3 runs directly over IP */
col_set_str ( pinfo - > cinfo , COL_PROTOCOL , " L2TPv3 " ) ;
col_clear ( pinfo - > cinfo , COL_INFO ) ;
sid = tvb_get_ntohl ( tvb , idx ) ;
if ( sid = = 0 ) {
/* This is control message */
/* Call to process l2tp v3 control message */
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process_l2tpv3_control ( tvb , pinfo , tree , 4 , l2tp_conv ) ;
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}
else {
/* Call to process l2tp v3 data message */
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process_l2tpv3_data_ip ( tvb , pinfo , tree , l2tp_conv ) ;
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}
return ;
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}
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static void init_l2tp_dissection ( void )
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{
GSList * iterator = list_heads ;
while ( iterator ) {
if ( iterator - > data ! = NULL )
g_slist_free ( ( GSList * ) iterator - > data ) ;
iterator = g_slist_next ( iterator ) ;
}
if ( list_heads ! = NULL ) {
g_slist_free ( list_heads ) ;
list_heads = NULL ;
}
}
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/* registration with the filtering engine */
void
proto_register_l2tp ( void )
{
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static hf_register_info hf [ ] = {
{ & hf_l2tp_type ,
{ " Type " , " l2tp.type " , FT_UINT16 , BASE_DEC , VALS ( l2tp_type_vals ) , 0x8000 ,
" Type bit " , HFILL } } ,
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{ & hf_l2tp_length_bit ,
{ " Length Bit " , " l2tp.length_bit " , FT_BOOLEAN , 16 , TFS ( & l2tp_length_bit_truth ) , 0x4000 ,
NULL , HFILL } } ,
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{ & hf_l2tp_seq_bit ,
{ " Sequence Bit " , " l2tp.seq_bit " , FT_BOOLEAN , 16 , TFS ( & l2tp_seq_bit_truth ) , 0x0800 ,
NULL , HFILL } } ,
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{ & hf_l2tp_offset_bit ,
{ " Offset bit " , " l2tp.offset_bit " , FT_BOOLEAN , 16 , TFS ( & l2tp_offset_bit_truth ) , 0x0200 ,
NULL , HFILL } } ,
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{ & hf_l2tp_priority ,
{ " Priority " , " l2tp.priority " , FT_BOOLEAN , 16 , TFS ( & l2tp_priority_truth ) , 0x0100 ,
" Priority bit " , HFILL } } ,
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{ & hf_l2tp_version ,
{ " Version " , " l2tp.version " , FT_UINT16 , BASE_DEC , NULL , 0x000f ,
NULL , HFILL } } ,
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{ & hf_l2tp_length ,
{ " Length " , " l2tp.length " , FT_UINT16 , BASE_DEC , NULL , 0x0 ,
NULL , HFILL } } ,
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{ & hf_l2tp_tunnel ,
{ " Tunnel ID " , " l2tp.tunnel " , FT_UINT16 , BASE_DEC , NULL , 0x0 , /* Probably should be FT_BYTES */
NULL , HFILL } } ,
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{ & hf_l2tp_session ,
{ " Session ID " , " l2tp.session " , FT_UINT16 , BASE_DEC , NULL , 0x0 , /* Probably should be FT_BYTES */
NULL , HFILL } } ,
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{ & hf_l2tp_Ns ,
{ " Ns " , " l2tp.Ns " , FT_UINT16 , BASE_DEC , NULL , 0x0 ,
NULL , HFILL } } ,
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{ & hf_l2tp_Nr ,
{ " Nr " , " l2tp.Nr " , FT_UINT16 , BASE_DEC , NULL , 0x0 ,
NULL , HFILL } } ,
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{ & hf_l2tp_offset ,
{ " Offset " , " l2tp.offset " , FT_UINT16 , BASE_DEC , NULL , 0x0 ,
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" Number of octest past the L2TP header at which the payload data starts. " , HFILL } } ,
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{ & hf_l2tp_avp_mandatory ,
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{ " Mandatory " , " l2tp.avp.mandatory " , FT_BOOLEAN , 16 , NULL , 0x8000 ,
NULL , HFILL } } ,
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{ & hf_l2tp_avp_hidden ,
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{ " Hidden " , " l2tp.avp.hidden " , FT_BOOLEAN , 16 , NULL , 0x4000 ,
NULL , HFILL } } ,
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{ & hf_l2tp_avp_length ,
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{ " Length " , " l2tp.avp.length " , FT_UINT16 , BASE_DEC , NULL , 0x03ff ,
NULL , HFILL } } ,
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{ & hf_l2tp_avp_vendor_id ,
{ " Vendor ID " , " l2tp.avp.vendor_id " , FT_UINT16 , BASE_DEC | BASE_EXT_STRING , & sminmpec_values_ext , 0 ,
" AVP Vendor ID " , HFILL } } ,
{ & hf_l2tp_avp_type ,
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{ " AVP Type " , " l2tp.avp.type " , FT_UINT16 , BASE_DEC | BASE_EXT_STRING , & avp_type_vals_ext , 0 ,
NULL , HFILL } } ,
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{ & hf_l2tp_tie_breaker ,
{ " Tie Breaker " , " l2tp.tie_breaker " , FT_UINT64 , BASE_HEX , NULL , 0 ,
NULL , HFILL } } ,
{ & hf_l2tp_sid ,
{ " Session ID " , " l2tp.sid " , FT_UINT32 , BASE_DEC , NULL , 0x0 ,
NULL , HFILL } } ,
{ & hf_l2tp_ccid ,
{ " Control Connection ID " , " l2tp.ccid " , FT_UINT32 , BASE_DEC , NULL , 0x0 ,
NULL , HFILL } } ,
{ & hf_l2tp_res ,
{ " Reserved " , " l2tp.res " , FT_UINT16 , BASE_HEX , NULL , 0x0 ,
NULL , HFILL } } ,
{ & hf_l2tp_cookie ,
{ " Cookie " , " l2tp.cookie " , FT_BYTES , BASE_NONE , NULL , 0x0 ,
NULL , HFILL } } ,
{ & hf_l2tp_l2_spec_def ,
{ " Default L2-Specific Sublayer " , " l2tp.l2_spec_def " , FT_NONE , BASE_NONE , NULL , 0x0 ,
NULL , HFILL } } ,
{ & hf_l2tp_l2_spec_atm ,
{ " ATM-Specific Sublayer " , " l2tp.l2_spec_atm " , FT_NONE , BASE_NONE , NULL , 0x0 ,
NULL , HFILL } } ,
{ & hf_l2tp_l2_spec_docsis_dmpt ,
{ " DOCSIS DMPT - Specific Sublayer " , " l2tp.l2_spec_docsis_dmpt " , FT_NONE , BASE_NONE , NULL , 0x0 ,
NULL , HFILL } } ,
{ & hf_l2tp_l2_spec_v ,
{ " V-bit " , " l2tp.l2_spec_v " , FT_BOOLEAN , 8 , NULL , 0x80 ,
" VCCV Bit " , HFILL } } ,
{ & hf_l2tp_l2_spec_s ,
{ " S-bit " , " l2tp.l2_spec_s " , FT_BOOLEAN , 8 , NULL , 0x40 ,
" Sequence Bit " , HFILL } } ,
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{ & hf_l2tp_l2_spec_h ,
{ " H-bits " , " l2tp.l2_spec_h " , FT_UINT8 , BASE_HEX , NULL , 0x30 ,
" Extended Header Bits " , HFILL } } ,
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{ & hf_l2tp_l2_spec_t ,
{ " T-bit " , " l2tp.l2_spec_t " , FT_BOOLEAN , 8 , NULL , 0x08 ,
" Transport Type Bit " , HFILL } } ,
{ & hf_l2tp_l2_spec_g ,
{ " G-bit " , " l2tp.l2_spec_g " , FT_BOOLEAN , 8 , NULL , 0x04 ,
" EFCI Bit " , HFILL } } ,
{ & hf_l2tp_l2_spec_c ,
{ " C-bit " , " l2tp.l2_spec_c " , FT_BOOLEAN , 8 , NULL , 0x02 ,
" CLP Bit " , HFILL } } ,
{ & hf_l2tp_l2_spec_u ,
{ " U-bit " , " l2tp.l2_spec_u " , FT_BOOLEAN , 8 , NULL , 0x01 ,
" C/R Bit " , HFILL } } ,
{ & hf_l2tp_l2_spec_flow_id ,
{ " Flow ID " , " l2tp.l2_spec_flow_id " , FT_UINT8 , BASE_HEX , NULL , FLOW_ID_MASK ,
NULL , HFILL } } ,
{ & hf_l2tp_l2_spec_sequence ,
{ " Sequence Number " , " l2tp.l2_spec_sequence " , FT_UINT24 , BASE_DEC , NULL , 0x0 ,
NULL , HFILL } } ,
{ & hf_l2tp_cisco_avp_type ,
{ " Type " , " l2tp.avp.ciscotype " , FT_UINT16 , BASE_DEC , VALS ( cisco_avp_type_vals ) , 0 ,
" AVP Type " , HFILL } } ,
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{ & hf_l2tp_cablelabs_avp_type ,
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{ " Type " , " l2tp.avp.cablelabstype " , FT_UINT16 , BASE_DEC , VALS ( cablelabs_avp_type_vals ) , 0 ,
" AVP Type " , HFILL } } ,
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{ & hf_l2tp_avp_message_type ,
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{ " Message Type " , " l2tp.avp.message_type " , FT_UINT16 , BASE_DEC | BASE_EXT_STRING , & message_type_vals_ext , 0 ,
2012-05-15 19:23:35 +00:00
NULL , HFILL } } ,
{ & hf_l2tp_avp_assigned_tunnel_id ,
{ " Assigned Tunnel ID " , " l2tp.avp.assigned_tunnel_id " , FT_UINT16 , BASE_DEC , NULL , 0 ,
NULL , HFILL } } ,
{ & hf_l2tp_avp_assigned_control_conn_id ,
{ " Assigned Control Connection ID " , " l2tp.avp.assigned_control_conn_id " , FT_UINT32 , BASE_DEC , NULL , 0 ,
NULL , HFILL } } ,
{ & hf_l2tp_avp_assigned_session_id ,
{ " Assigned Session ID " , " l2tp.avp.assigned_session_id " , FT_UINT16 , BASE_DEC , NULL , 0 ,
NULL , HFILL } } ,
{ & hf_l2tp_avp_remote_session_id ,
{ " Remote Session ID " , " l2tp.avp.remote_session_id " , FT_UINT32 , BASE_DEC , NULL , 0 ,
NULL , HFILL } } ,
{ & hf_l2tp_avp_local_session_id ,
{ " Local Session ID " , " l2tp.avp.local_session_id " , FT_UINT32 , BASE_DEC , NULL , 0 ,
NULL , HFILL } } ,
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{ & hf_l2tp_avp_called_number ,
{ " Called Number " , " l2tp.avp.called_number " , FT_STRING , BASE_NONE , NULL , 0 ,
NULL , HFILL } } ,
{ & hf_l2tp_avp_calling_number ,
{ " Calling Number " , " l2tp.avp.calling_number " , FT_STRING , BASE_NONE , NULL , 0 ,
NULL , HFILL } } ,
2013-07-18 02:42:06 +00:00
{ & hf_l2tp_cisco_tie_breaker ,
{ " Tie Breaker " , " l2tp.cisco.tie_breaker " , FT_UINT64 , BASE_HEX , NULL , 0 ,
NULL , HFILL } } ,
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{ & hf_l2tp_cablel_avp_l_bit ,
{ " L(lock bit) " , " l2tp.cablel.l_bit " , FT_BOOLEAN , 16 , NULL , 0x8000 ,
NULL , HFILL } } ,
{ & hf_l2tp_cablel_avp_tsid_group_id ,
{ " TSID Group ID " , " l2tp.cablel.tsid_group_id " , FT_UINT16 , BASE_DEC , NULL , 0x7f00 ,
NULL , HFILL } } ,
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{ & hf_l2tp_cablel_avp_frequency ,
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{ " Frequency " , " l2tp.cablel.frequency " , FT_UINT32 , BASE_DEC , NULL , 0 ,
NULL , HFILL } } ,
{ & hf_l2tp_cablel_avp_modulation ,
{ " Modulation " , " l2tp.cablel.modulation " , FT_UINT16 , BASE_DEC , VALS ( l2tp_cablel_modulation_vals ) , 0x000f ,
NULL , HFILL } } ,
{ & hf_l2tp_cablel_avp_m ,
{ " M " , " l2tp.cablel.m " , FT_UINT16 , BASE_DEC , NULL , 0x0 ,
NULL , HFILL } } ,
{ & hf_l2tp_cablel_avp_n ,
{ " N " , " l2tp.cablel.n " , FT_UINT16 , BASE_DEC , NULL , 0x0 ,
NULL , HFILL } } ,
2013-07-18 02:42:06 +00:00
/* Generated from convert_proto_tree_add_text.pl */
{ & hf_l2tp_cisco_assigned_control_connection_id , { " Assigned Control Connection ID " , " l2tp.cisco.assigned_control_connection_id " , FT_UINT32 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_cisco_pw_type , { " PW Type " , " l2tp.cisco.pw_type " , FT_UINT16 , BASE_DEC , VALS ( pw_types_vals ) , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_cisco_local_session_id , { " Local Session ID " , " l2tp.cisco.local_session_id " , FT_UINT32 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_cisco_remote_session_id , { " Remote Session ID " , " l2tp.cisco.remote_session_id " , FT_UINT32 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_cisco_assigned_cookie , { " Assigned Cookie " , " l2tp.cisco.assigned_cookie " , FT_BYTES , BASE_NONE , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_cisco_remote_end_id , { " Remote End ID " , " l2tp.cisco.remote_end_id " , FT_STRING , BASE_NONE , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_cisco_pseudowire_type , { " Pseudowire Type " , " l2tp.cisco.pseudowire_type " , FT_UINT16 , BASE_DEC , VALS ( pw_types_vals ) , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_cisco_circuit_status , { " Circuit Status " , " l2tp.cisco.circuit_status " , FT_BOOLEAN , 16 , TFS ( & tfs_up_down ) , 0x0001 , NULL , HFILL } } ,
{ & hf_l2tp_cisco_circuit_type , { " Circuit Type " , " l2tp.cisco.circuit_type " , FT_BOOLEAN , 16 , TFS ( & tfs_new_existing ) , 0x0001 , NULL , HFILL } } ,
{ & hf_l2tp_cisco_draft_avp_version , { " Draft AVP Version " , " l2tp.cisco.draft_avp_version " , FT_UINT16 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_cisco_message_digest , { " Message Digest " , " l2tp.cisco.message_digest " , FT_BYTES , BASE_NONE , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_cisco_nonce , { " Nonce " , " l2tp.cisco.nonce " , FT_BYTES , BASE_NONE , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_cisco_interface_mtu , { " Interface MTU " , " l2tp.cisco.interface_mtu " , FT_UINT16 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_stop_ccn_result_code , { " Result code " , " l2tp.result_code " , FT_UINT16 , BASE_DEC , VALS ( result_code_stopccn_vals ) , 0x0 , NULL , HFILL } } ,
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{ & hf_l2tp_result_code , { " Result code " , " l2tp.result_code " , FT_UINT16 , BASE_DEC | BASE_EXT_STRING , & result_code_cdn_vals_ext , 0x0 , NULL , HFILL } } ,
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{ & hf_l2tp_avp_error_code , { " Error code " , " l2tp.avp.error_code " , FT_UINT16 , BASE_DEC , VALS ( error_code_vals ) , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_error_message , { " Error Message " , " l2tp.avp.error_message " , FT_STRING , BASE_NONE , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_protocol_version , { " Version " , " l2tp.avp.protocol_version " , FT_UINT8 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_protocol_revision , { " Revision " , " l2tp.avp.protocol_revision " , FT_UINT8 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_async_framing_supported , { " Async Framing Supported " , " l2tp.avp.async_framing_supported " , FT_BOOLEAN , 32 , TFS ( & tfs_true_false ) , 0x0002 , NULL , HFILL } } ,
{ & hf_l2tp_avp_sync_framing_supported , { " Sync Framing Supported " , " l2tp.avp.sync_framing_supported " , FT_BOOLEAN , 32 , TFS ( & tfs_true_false ) , 0x0001 , NULL , HFILL } } ,
{ & hf_l2tp_avp_analog_access_supported , { " Analog Access Supported " , " l2tp.avp.analog_access_supported " , FT_BOOLEAN , 32 , TFS ( & tfs_true_false ) , 0x0002 , NULL , HFILL } } ,
{ & hf_l2tp_avp_digital_access_supported , { " Digital Access Supported " , " l2tp.avp.digital_access_supported " , FT_BOOLEAN , 32 , TFS ( & tfs_true_false ) , 0x0001 , NULL , HFILL } } ,
{ & hf_l2tp_avp_firmware_revision , { " Firmware Revision " , " l2tp.avp.firmware_revision " , FT_UINT16 , BASE_DEC_HEX , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_host_name , { " Host Name " , " l2tp.avp.host_name " , FT_STRING , BASE_NONE , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_vendor_name , { " Vendor Name " , " l2tp.avp.vendor_name " , FT_STRING , BASE_NONE , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_receive_window_size , { " Receive Window Size " , " l2tp.avp.receive_window_size " , FT_UINT16 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_chap_challenge , { " CHAP Challenge " , " l2tp.avp.chap_challenge " , FT_BYTES , BASE_NONE , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_cause_code , { " Cause Code " , " l2tp.avp.cause_code " , FT_UINT16 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_cause_msg , { " Cause Msg " , " l2tp.avp.cause_msg " , FT_UINT8 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_advisory_msg , { " Advisory Msg " , " l2tp.avp.advisory_msg " , FT_STRING , BASE_NONE , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_chap_challenge_response , { " CHAP Challenge Response " , " l2tp.avp.chap_challenge_response " , FT_BYTES , BASE_NONE , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_call_serial_number , { " Call Serial Number " , " l2tp.avp.call_serial_number " , FT_UINT32 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_minimum_bps , { " Minimum BPS " , " l2tp.avp.minimum_bps " , FT_UINT32 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_maximum_bps , { " Maximum BPS " , " l2tp.avp.maximum_bps " , FT_UINT32 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_analog_bearer_type , { " Analog Bearer Type " , " l2tp.avp.analog_bearer_type " , FT_BOOLEAN , 32 , TFS ( & tfs_true_false ) , 0x0002 , NULL , HFILL } } ,
{ & hf_l2tp_avp_digital_bearer_type , { " Digital Bearer Type " , " l2tp.avp.digital_bearer_type " , FT_BOOLEAN , 32 , TFS ( & tfs_true_false ) , 0x0001 , NULL , HFILL } } ,
{ & hf_l2tp_avp_async_framing_type , { " Async Framing Type " , " l2tp.avp.async_framing_type " , FT_BOOLEAN , 32 , TFS ( & tfs_true_false ) , 0x0002 , NULL , HFILL } } ,
{ & hf_l2tp_avp_sync_framing_type , { " Sync Framing Type " , " l2tp.avp.sync_framing_type " , FT_BOOLEAN , 32 , TFS ( & tfs_true_false ) , 0x0001 , NULL , HFILL } } ,
{ & hf_l2tp_avp_sub_address , { " Sub-Address " , " l2tp.avp.sub_address " , FT_STRING , BASE_NONE , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_connect_speed , { " Connect Speed " , " l2tp.avp.connect_speed " , FT_UINT32 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_physical_channel , { " Physical Channel " , " l2tp.avp.physical_channel " , FT_UINT32 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_initial_received_lcp_confreq , { " Initial Received LCP CONFREQ " , " l2tp.avp.initial_received_lcp_confreq " , FT_BYTES , BASE_NONE , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_last_sent_lcp_confreq , { " Last Sent LCP CONFREQ " , " l2tp.avp.last_sent_lcp_confreq " , FT_BYTES , BASE_NONE , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_last_received_lcp_confreq , { " Last Received LCP CONFREQ " , " l2tp.avp.last_received_lcp_confreq " , FT_BYTES , BASE_NONE , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_proxy_authen_type , { " Proxy Authen Type " , " l2tp.avp.proxy_authen_type " , FT_UINT16 , BASE_DEC , VALS ( authen_type_vals ) , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_proxy_authen_name , { " Proxy Authen Name " , " l2tp.avp.proxy_authen_name " , FT_STRING , BASE_NONE , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_proxy_authen_challenge , { " Proxy Authen Challenge " , " l2tp.avp.proxy_authen_challenge " , FT_BYTES , BASE_NONE , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_proxy_authen_id , { " Proxy Authen ID " , " l2tp.avp.proxy_authen_id " , FT_UINT8 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_proxy_authen_response , { " Proxy Authen Response " , " l2tp.avp.proxy_authen_response " , FT_BYTES , BASE_NONE , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_crc_errors , { " CRC Errors " , " l2tp.avp.crc_errors " , FT_UINT32 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_framing_errors , { " Framing Errors " , " l2tp.avp.framing_errors " , FT_UINT32 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_hardware_overruns , { " Hardware Overruns " , " l2tp.avp.hardware_overruns " , FT_UINT32 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_buffer_overruns , { " Buffer Overruns " , " l2tp.avp.buffer_overruns " , FT_UINT32 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_time_out_errors , { " Time-out Errors " , " l2tp.avp.time_out_errors " , FT_UINT32 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_alignment_errors , { " Alignment Errors " , " l2tp.avp.alignment_errors " , FT_UINT32 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_send_accm , { " Send ACCM " , " l2tp.avp.send_accm " , FT_UINT32 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_receive_accm , { " Receive ACCM " , " l2tp.avp.receive_accm " , FT_UINT32 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_random_vector , { " Random Vector " , " l2tp.avp.random_vector " , FT_BYTES , BASE_NONE , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_private_group_id , { " Private Group ID " , " l2tp.avp.private_group_id " , FT_BYTES , BASE_NONE , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_rx_connect_speed , { " Rx Connect Speed " , " l2tp.avp.rx_connect_speed " , FT_UINT32 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_disconnect_code , { " Disconnect Code " , " l2tp.avp.disconnect_code " , FT_UINT16 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_control_protocol_number , { " Control Protocol Number " , " l2tp.avp.control_protocol_number " , FT_UINT16 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_cause_code_direction , { " Direction " , " l2tp.avp.cause_code_direction " , FT_UINT8 , BASE_DEC , VALS ( cause_code_direction_vals ) , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_cause_code_message , { " Message " , " l2tp.avp.cause_code_message " , FT_STRING , BASE_NONE , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_message_digest , { " Message Digest " , " l2tp.avp.message_digest " , FT_BYTES , BASE_NONE , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_router_id , { " Router ID " , " l2tp.avp.router_id " , FT_UINT32 , BASE_DEC , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_pw_type , { " PW Type " , " l2tp.avp.pw_type " , FT_UINT16 , BASE_DEC , VALS ( pw_types_vals ) , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_assigned_cookie , { " Assigned Cookie " , " l2tp.avp.assigned_cookie " , FT_BYTES , BASE_NONE , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_remote_end_id , { " Remote End ID " , " l2tp.avp.remote_end_id " , FT_STRING , BASE_NONE , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_pseudowire_type , { " Pseudowire Type " , " l2tp.avp.pseudowire_type " , FT_UINT16 , BASE_DEC , VALS ( pw_types_vals ) , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_layer2_specific_sublayer , { " Layer2 Specific Sublayer " , " l2tp.avp.layer2_specific_sublayer " , FT_UINT16 , BASE_DEC , VALS ( l2_sublayer_vals ) , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_data_sequencing , { " Data Sequencing " , " l2tp.avp.data_sequencing " , FT_UINT16 , BASE_DEC , VALS ( data_sequencing_vals ) , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_circuit_status , { " Circuit Status " , " l2tp.avp.circuit_status " , FT_BOOLEAN , 16 , TFS ( & tfs_up_down ) , 0x0001 , NULL , HFILL } } ,
{ & hf_l2tp_avp_circuit_type , { " Circuit Type " , " l2tp.avp.circuit_type " , FT_BOOLEAN , 16 , TFS ( & tfs_new_existing ) , 0x0002 , NULL , HFILL } } ,
{ & hf_l2tp_avp_preferred_language , { " Preferred Language " , " l2tp.avp.preferred_language " , FT_STRING , BASE_NONE , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_nonce , { " Nonce " , " l2tp.avp.nonce " , FT_BYTES , BASE_NONE , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_tx_connect_speed_v3 , { " Tx Connect Speed v3 " , " l2tp.avp.tx_connect_speed_v3 " , FT_UINT64 , BASE_HEX , NULL , 0x0 , NULL , HFILL } } ,
{ & hf_l2tp_avp_rx_connect_speed_v3 , { " Rx Connect Speed v3 " , " l2tp.avp.rx_connect_speed_v3 " , FT_UINT64 , BASE_HEX , NULL , 0x0 , NULL , HFILL } } ,
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} ;
static gint * ett [ ] = {
& ett_l2tp ,
& ett_l2tp_ctrl ,
& ett_l2tp_avp ,
& ett_l2tp_avp_sub ,
& ett_l2tp_l2_spec ,
& ett_l2tp_lcp ,
} ;
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static ei_register_info ei [ ] = {
{ & ei_l2tp_incorrect_digest , { " l2tp.incorrect_digest " , PI_CHECKSUM , PI_WARN , " Incorrect Digest " , EXPFILL } } ,
} ;
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module_t * l2tp_module ;
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expert_module_t * expert_l2tp ;
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proto_l2tp = proto_register_protocol (
" Layer 2 Tunneling Protocol " , " L2TP " , " l2tp " ) ;
proto_register_field_array ( proto_l2tp , hf , array_length ( hf ) ) ;
proto_register_subtree_array ( ett , array_length ( ett ) ) ;
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expert_l2tp = expert_register_protocol ( proto_l2tp ) ;
expert_register_field_array ( expert_l2tp , ei , array_length ( ei ) ) ;
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l2tp_vendor_avp_dissector_table = register_dissector_table ( " l2tp.vendor_avp " , " L2TP vendor AVP dissector table " , FT_UINT32 , BASE_DEC ) ;
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l2tp_module = prefs_register_protocol ( proto_l2tp , NULL ) ;
prefs_register_enum_preference ( l2tp_module ,
" cookie_size " ,
" L2TPv3 Cookie Size " ,
" L2TPv3 Cookie Size " ,
& l2tpv3_cookie ,
l2tpv3_cookies ,
FALSE ) ;
prefs_register_enum_preference ( l2tp_module ,
" l2_specific " ,
" L2TPv3 L2-Specific Sublayer " ,
" L2TPv3 L2-Specific Sublayer " ,
& l2tpv3_l2_specific ,
l2tpv3_l2_specifics ,
FALSE ) ;
prefs_register_enum_preference ( l2tp_module ,
" protocol " ,
" Decode L2TPv3 packet contents as this protocol " ,
" Decode L2TPv3 packet contents as this protocol " ,
& l2tpv3_protocol ,
l2tpv3_protocols ,
FALSE ) ;
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prefs_register_string_preference ( l2tp_module , " shared_secret " , " Shared Secret " ,
" Shared secret used for control message digest authentication " ,
& shared_secret ) ;
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register_init_routine ( init_l2tp_dissection ) ;
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}
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void
proto_reg_handoff_l2tp ( void )
{
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l2tp_udp_handle = new_create_dissector_handle ( dissect_l2tp_udp , proto_l2tp ) ;
dissector_add_uint ( " udp.port " , UDP_PORT_L2TP , l2tp_udp_handle ) ;
l2tp_ip_handle = create_dissector_handle ( dissect_l2tp_ip , proto_l2tp ) ;
dissector_add_uint ( " ip.proto " , IP_PROTO_L2TP , l2tp_ip_handle ) ;
/*
* Get a handle for the PPP - in - HDLC - like - framing dissector .
*/
ppp_hdlc_handle = find_dissector ( " ppp_hdlc " ) ;
ppp_lcp_options_handle = find_dissector ( " ppp_lcp_options " ) ;
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/* Register vendor AVP dissector(s)*/
dissector_add_uint ( " l2tp.vendor_avp " , VENDOR_CABLELABS , new_create_dissector_handle ( dissect_l2tp_vnd_cablelabs_avps , proto_l2tp ) ) ;
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/*
* Get a handle for the dissectors used in v3 .
*/
eth_withoutfcs_handle = find_dissector ( " eth_withoutfcs " ) ;
chdlc_handle = find_dissector ( " chdlc " ) ;
fr_handle = find_dissector ( " fr " ) ;
ip_handle = find_dissector ( " ip " ) ;
mpls_handle = find_dissector ( " mpls " ) ;
atm_oam_handle = find_dissector ( " atm_oam_cell " ) ;
llc_handle = find_dissector ( " llc " ) ;
lapd_handle = find_dissector ( " lapd " ) ;
mp2t_handle = find_dissector ( " mp2t " ) ;
ehdlc_handle = find_dissector ( " ehdlc " ) ;
data_handle = find_dissector ( " data " ) ;
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}
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/*
* Editor modelines - http : //www.wireshark.org/tools/modelines.html
*
* Local variables :
* c - basic - offset : 4
* tab - width : 8
* indent - tabs - mode : nil
* End :
*
* vi : set shiftwidth = 4 tabstop = 8 expandtab :
* : indentSize = 4 : tabSize = 8 : noTabs = true :
*/