nexmon – Rev 1
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/* packet-l2tp.c
* Routines for Layer Two Tunnelling Protocol (L2TP) packet disassembly
* John Thomes <john@ensemblecom.com>
*
* Minor changes by: (2000-01-10)
* Laurent Cazalet <laurent.cazalet@mailclub.net>
* Thomas Parvais <thomas.parvais@advalvas.be>
*
* Added RFC 5515 by Uli Heilmeier <uh@heilmeier.eu>, 2016-02-29
*
* Ericsson L2TP by Harald Welte <laforge@gnumonks.org>, 2016-07-16
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* 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.
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
* RFC 2661 for L2TPv2
* http://tools.ietf.org/html/rfc2661
*
* RFC 3931 for L2TPv3
* http://tools.ietf.org/html/rfc3931
*
* Layer Two Tunneling Protocol "L2TP" number assignments:
* http://www.iana.org/assignments/l2tp-parameters
*
* 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?
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/ipproto.h>
#include <epan/sminmpec.h>
#include <epan/prefs.h>
#include <epan/conversation.h>
#include <epan/expert.h>
#include <epan/decode_as.h>
#include <epan/proto_data.h>
#include <wsutil/md5.h>
#include <wsutil/sha1.h>
#include "packet-l2tp.h"
void proto_register_l2tp(void);
void proto_reg_handoff_l2tp(void);
static int proto_l2tp = -1;
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;
static int hf_l2tp_priority = -1;
static int hf_l2tp_version = -1;
static int hf_l2tp_length = -1;
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;
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;
static int hf_l2tp_tie_breaker = -1;
static int hf_l2tp_sid = -1;
static int hf_l2tp_res = -1;
static int hf_l2tp_ccid = -1;
static int hf_l2tp_cookie = -1;
static int hf_l2tp_l2_spec_def = -1;
static int hf_l2tp_l2_spec_atm = -1;
static int hf_l2tp_l2_spec_docsis_dmpt = -1;
static int hf_l2tp_l2_spec_v = -1;
static int hf_l2tp_l2_spec_s = -1;
static int hf_l2tp_l2_spec_h = -1;
static int hf_l2tp_l2_spec_flow_id = -1;
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;
static int hf_l2tp_cisco_avp_type = -1;
static int hf_l2tp_ericsson_avp_type = -1;
static int hf_l2tp_broadband_avp_type = -1;
static int hf_l2tp_cablelabs_avp_type = -1;
static int hf_l2tp_avp_message_type = -1;
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;
static int hf_l2tp_avp_called_number = -1;
static int hf_l2tp_avp_calling_number = -1;
static int hf_l2tp_cisco_tie_breaker = -1;
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;
static int hf_l2tp_broadband_agent_circuit_id = -1;
static int hf_l2tp_broadband_agent_remote_id = -1;
static int hf_l2tp_broadband_actual_dr_up = -1;
static int hf_l2tp_broadband_actual_dr_down = -1;
static int hf_l2tp_broadband_minimum_dr_up = -1;
static int hf_l2tp_broadband_minimum_dr_down = -1;
static int hf_l2tp_broadband_attainable_dr_up = -1;
static int hf_l2tp_broadband_attainable_dr_down = -1;
static int hf_l2tp_broadband_maximum_dr_up = -1;
static int hf_l2tp_broadband_maximum_dr_down = -1;
static int hf_l2tp_broadband_minimum_dr_up_low_power = -1;
static int hf_l2tp_broadband_minimum_dr_down_low_power = -1;
static int hf_l2tp_broadband_maximum_interleaving_delay_up = -1;
static int hf_l2tp_broadband_actual_interleaving_delay_up = -1;
static int hf_l2tp_broadband_maximum_interleaving_delay_down = -1;
static int hf_l2tp_broadband_actual_interleaving_delay_down = -1;
static int hf_l2tp_broadband_access_loop_encapsulation = -1;
static int hf_l2tp_broadband_access_loop_encapsulation_data_link = -1;
static int hf_l2tp_broadband_access_loop_encapsulation_enc1 = -1;
static int hf_l2tp_broadband_access_loop_encapsulation_enc2 = -1;
static int hf_l2tp_broadband_ancp_access_line_type = -1;
static int hf_l2tp_broadband_iwf_session = -1;
static int hf_l2tp_avp_csu = -1;
static int hf_l2tp_avp_csu_res = -1;
static int hf_l2tp_avp_csu_remote_session_id_v2 = -1;
static int hf_l2tp_avp_csu_current_tx_speed_v2 = -1;
static int hf_l2tp_avp_csu_current_rx_speed_v2 = -1;
static int hf_l2tp_avp_csu_remote_session_id_v3 = -1;
static int hf_l2tp_avp_csu_current_tx_speed_v3 = -1;
static int hf_l2tp_avp_csu_current_rx_speed_v3 = -1;
static int hf_l2tp_ericsson_msg_type = -1;
static int hf_l2tp_ericsson_conn_type = -1;
static int hf_l2tp_ericsson_stn_name = -1;
static int hf_l2tp_ericsson_crc32_enable = -1;
static int hf_l2tp_ericsson_abis_lower_mode = -1;
static int hf_l2tp_ericsson_tc_overl_thresh = -1;
static int hf_l2tp_ericsson_tc_num_groups = -1;
static int hf_l2tp_ericsson_tcg_group_id = -1;
static int hf_l2tp_ericsson_tcg_num_sapis = -1;
static int hf_l2tp_ericsson_tcg_sapi = -1;
static int hf_l2tp_ericsson_tcg_ip = -1;
static int hf_l2tp_ericsson_tcg_dscp = -1;
static int hf_l2tp_ericsson_tcg_crc32_enable = -1;
static int hf_l2tp_ericsson_tc_num_maps = -1;
static int hf_l2tp_ericsson_map_tei_low = -1;
static int hf_l2tp_ericsson_map_tei_high = -1;
static int hf_l2tp_ericsson_map_sc = -1;
static int hf_l2tp_ericsson_ver_pref = -1;
static int hf_l2tp_ericsson_ver_2 = -1;
static int hf_l2tp_ericsson_ver_3 = -1;
/* 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;
static int hf_l2tp_lapd_info = -1;
static int hf_l2tp_session_id = -1;
static int hf_l2tp_zero_length_body_message = -1;
static int hf_l2tp_offset_padding = -1;
static dissector_table_t l2tp_vendor_avp_dissector_table;
static dissector_table_t pw_type_table;
#define UDP_PORT_L2TP 1701
#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 - unused */
#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 */
/* DOCSIS DMPT Sub-Layer Header definitions */
#define FLOW_ID_MASK 0x0E
static gint ett_l2tp = -1;
static gint ett_l2tp_ctrl = -1;
static gint ett_l2tp_avp = -1;
static gint ett_l2tp_avp_sub = -1;
static gint ett_l2tp_ale_sub = -1;
static gint ett_l2tp_lcp = -1;
static gint ett_l2tp_l2_spec = -1;
static gint ett_l2tp_csu = -1;
static gint ett_l2tp_ericsson_tcg = -1;
static gint ett_l2tp_ericsson_map = -1;
static expert_field ei_l2tp_incorrect_digest = EI_INIT;
/* Generated from convert_proto_tree_add_text.pl */
static expert_field ei_l2tp_vendor_specific_avp_data = EI_INIT;
static expert_field ei_l2tp_avp_length = EI_INIT;
static const enum_val_t l2tpv3_cookies[] = {
{"detect", "Detect", -1},
{"cookie0", "None", 0},
{"cookie4", "4 Byte Cookie", 4},
{"cookie8", "8 Byte Cookie", 8},
{NULL, NULL, 0}
};
#define L2TPv3_COOKIE_DEFAULT 0
#define L2TPv3_PROTOCOL_DEFAULT L2TPv3_PROTOCOL_CHDLC
#define L2TPv3_L2_SPECIFIC_NONE 0
#define L2TPv3_L2_SPECIFIC_DEFAULT 1
#define L2TPv3_L2_SPECIFIC_ATM 2
#define L2TPv3_L2_SPECIFIC_LAPD 3
#define L2TPv3_L2_SPECIFIC_DOCSIS_DMPT 4
#define L2TPv3_L2_SPECIFIC_MAX (L2TPv3_L2_SPECIFIC_DOCSIS_DMPT + 1)
static const enum_val_t l2tpv3_l2_specifics[] = {
{"detect", "Detect", -1},
{"none", "None", L2TPv3_L2_SPECIFIC_NONE},
{"default", "Default L2-Specific", L2TPv3_L2_SPECIFIC_DEFAULT},
{"atm", "ATM-Specific", L2TPv3_L2_SPECIFIC_ATM},
{"lapd", "LAPD-Specific", L2TPv3_L2_SPECIFIC_LAPD},
{"dmpt", "DOCSIS DMPT-Specific", L2TPv3_L2_SPECIFIC_DOCSIS_DMPT},
{NULL, NULL, 0}
};
static gint l2tpv3_cookie = -1;
static gint l2tpv3_l2_specific = -1;
#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
#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
#define MESSAGE_TYPE_CSUN 28
#define MESSAGE_TYPE_CSURQ 29
static const value_string message_type_vals[] = {
{ MESSAGE_TYPE_SCCRQ, "Start_Control_Request" },
{ MESSAGE_TYPE_SCCRP, "Start_Control_Reply" },
{ MESSAGE_TYPE_SCCCN, "Start_Control_Connected" },
{ MESSAGE_TYPE_StopCCN, "Stop_Control_Notification" },
{ MESSAGE_TYPE_Reserved_5, "Reserved" },
{ 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" },
{ MESSAGE_TYPE_Reserved_13, "Reserved" },
{ 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" },
{ MESSAGE_TYPE_CSUN, "Connect-Speed-Update-Notification" },
{ MESSAGE_TYPE_CSURQ, "Connect-Speed-Update-Request" },
{ 0, NULL },
};
static value_string_ext message_type_vals_ext = VALUE_STRING_EXT_INIT(message_type_vals);
static const value_string l2tp_message_type_short_str_vals[] = {
{ 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" },
{ MESSAGE_TYPE_CSUN, "CSUN" },
{ MESSAGE_TYPE_CSURQ, "CSURQ" },
{ 0, NULL },
};
static value_string_ext l2tp_message_type_short_str_vals_ext = VALUE_STRING_EXT_INIT(l2tp_message_type_short_str_vals);
static const char *control_msg = "Control Message";
static const char *data_msg = "Data Message";
static const value_string l2tp_type_vals[] = {
{ 0, "Data Message" },
{ 1, "Control Message" },
{ 0, NULL },
};
static const value_string cause_code_direction_vals[] = {
{ 0, "global error" },
{ 1, "at peer" },
{ 2, "at local" },
{ 0, NULL },
};
static const true_false_string l2tp_length_bit_truth =
{ "Length field is present", "Length field is not present" };
static const true_false_string l2tp_seq_bit_truth =
{ "Ns and Nr fields are present", "Ns and Nr fields are not present" };
static const true_false_string l2tp_offset_bit_truth =
{ "Offset Size field is present", "Offset size field is not present" };
static const true_false_string l2tp_priority_truth =
{ "This data message has priority", "No priority" };
static const value_string authen_type_vals[] = {
{ 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 }
};
static const value_string data_sequencing_vals[] = {
{ 0, "No incoming data packets require sequencing" },
{ 1, "Only non-IP data packets require sequencing" },
{ 2, "All incoming data packets require sequencing" },
{ 0, NULL }
};
static const value_string l2_sublayer_vals[] = {
{ 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 }
};
/* Result Code values for the StopCCN message */
static const value_string result_code_stopccn_vals[] = {
{ 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 }
};
/* Result Code values for the CDN message */
static const value_string result_code_cdn_vals[] = {
{ 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", },
{ 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] */
{ 22, "Session not established due to other LCCE can not support the OAM Cell Emulation", }, /* [RFC4454] */
{ 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] */
{ 29, "Unassigned", },
{ 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] */
{ 0, NULL }
};
static value_string_ext result_code_cdn_vals_ext = VALUE_STRING_EXT_INIT(result_code_cdn_vals);
static const value_string error_code_vals[] = {
{ 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 }
};
#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
#define INITIAL_RECEIVED_LCP_CONFREQ 26
#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
#define CONNECT_SPEED_UPDATE 97
/* http://www.iana.org/assignments/l2tp-parameters/l2tp-parameters.xhtml */
#define NUM_AVP_TYPES 102
static const value_string avp_type_vals[] = {
{ 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" },
{ 20, "Reserved" },
{ 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] */
{ 86, "ATM Maximum Concatenated Cells" }, /*[RFC4454] */
{ 87, "OAM Emulation Required" }, /*[RFC4454] */
{ 88, "ATM Alarm Status" }, /*[RFC4454] */
/* Also, see ATM Alarm Status AVP Values below */
{ 89, "Attachment Group Identifier" }, /*[RFC4667] */
{ 90, "Local End Identifier" }, /*[RFC4667] */
{ 91, "Interface Maximum Transmission Unit" }, /*[RFC4667] */
{ 92, "FCS Retention" }, /*[RFC4720] */
{ 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] */
{ CONNECT_SPEED_UPDATE, "Connect Speed Update" }, /*[RFC5515] */
{ 98, "Connect Speed Update Enable" }, /*[RFC5515] */
{ 99, "TDM Pseudowire" }, /*[RFC5611] */
{ 100, "RTP AVP" }, /*[RFC5611] */
{ 101, "PW Switching Point" }, /*[RFC6073] */
{ 0, NULL }
};
static value_string_ext avp_type_vals_ext = VALUE_STRING_EXT_INIT(avp_type_vals);
#define CISCO_ACK 0
#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
static const value_string cisco_avp_type_vals[] = {
{ CISCO_ACK, "Cisco ACK" },
{ 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 }
};
#define ERICSSON_MSG_TYPE 0
#define ERICSSON_TRANSPORT_CONFIG 1
#define ERICSSON_PROTO_VERSION 3
#define ERICSSON_CONN_TYPE 4
#define ERICSSON_CRC_ENABLED 5
#define ERICSSON_STN_NAME 6
#define ERICSSON_ABIS_LOWER_MODE 7
#define ERICSSNN_TEI_TO_SC_MAP 8
static const value_string ericsson_avp_type_vals[] = {
{ ERICSSON_MSG_TYPE, "Message Type" },
{ ERICSSON_TRANSPORT_CONFIG, "Transport Configuration" },
{ ERICSSON_PROTO_VERSION, "Protocol Version" },
{ ERICSSON_CONN_TYPE, "Connection Type" },
{ ERICSSON_STN_NAME, "STN Name" },
{ ERICSSON_CRC_ENABLED, "CRC32 Enabled" },
{ ERICSSON_ABIS_LOWER_MODE, "Abis Lower Mode" },
{ ERICSSNN_TEI_TO_SC_MAP, "TEI to SC Map" },
{ 0, NULL }
};
static const value_string ericsson_msg_type_vals[] = {
{ 0, "Transport Configuration Notification" },
{ 1, "Performance Notification" },
{ 2, "Transport Configuration Request" },
{ 3, "Transport Configuration Response" },
{ 4, "Abis Lower Transport Config Request" },
{ 5, "Abis Lower Transport Config Response" },
{ 6, "Local Connect Channel Status Notification" },
{ 0, NULL }
};
static const value_string ericsson_short_msg_type_vals[] = {
{ 0, "TCN" },
{ 1, "PN" },
{ 2, "TCRQ" },
{ 3, "TCRP" },
{ 4, "ALTCRQ" },
{ 5, "ALTCRP" },
{ 6, "LCCSN" },
{ 0, NULL }
};
static const value_string ericsson_conn_type_vals[] = {
{ 0, "Primary" },
{ 1, "Secondary" },
{ 0, NULL }
};
static const value_string ericsson_abis_lower_mode_vals[] = {
{ 0, "Single Timeslot" },
{ 1, "Super Channel" },
{ 0, NULL }
};
#define BROADBAND_AGENT_CIRCUIT_ID 1
#define BROADBAND_AGENT_REMOTE_ID 2
#define BROADBAND_ACTUAL_DR_UP 129
#define BROADBAND_ACTUAL_DR_DOWN 130
#define BROADBAND_MINIMUM_DR_UP 131
#define BROADBAND_MINIMUM_DR_DOWN 132
#define BROADBAND_ATTAINABLE_DR_UP 133
#define BROADBAND_ATTAINABLE_DR_DOWN 134
#define BROADBAND_MAXIMUM_DR_UP 135
#define BROADBAND_MAXIMUM_DR_DOWN 136
#define BROADBAND_MINIMUM_DR_UP_LOW_POWER 137
#define BROADBAND_MINIMUM_DR_DOWN_LOW_POWER 138
#define BROADBAND_MAXIMUM_INTERLEAVING_DELAY_UP 139
#define BROADBAND_ACTUAL_INTERLEAVING_DELAY_UP 140
#define BROADBAND_MAXIMUM_INTERLEAVING_DELAY_DOWN 141
#define BROADBAND_ACTUAL_INTERLEAVING_DELAY_DOWN 142
#define BROADBAND_ACCESS_LOOP_ENCAPSULATION 144
#define BROADBAND_ANCP_ACCESS_LINE_TYPE 145
#define BROADBAND_IWF_SESSION 254
static const value_string broadband_avp_type_vals[] = {
{ BROADBAND_AGENT_CIRCUIT_ID, "Agent-Circuit-Id" },
{ BROADBAND_AGENT_REMOTE_ID, "Agent-Remote-Id" },
{ BROADBAND_ACTUAL_DR_UP, "Actual-Data-Rate-Upstream" },
{ BROADBAND_ACTUAL_DR_DOWN, "Actual-Data-Rate-Downstream" },
{ BROADBAND_MINIMUM_DR_UP, "Minimum-Data-Rate-Upstream" },
{ BROADBAND_MINIMUM_DR_DOWN, "Minimum-Data-Rate-Downstream" },
{ BROADBAND_ATTAINABLE_DR_UP, "Attainable-Data-Rate-Upstream" },
{ BROADBAND_ATTAINABLE_DR_DOWN, "Attainable-Data-Rate-Downstream" },
{ BROADBAND_MAXIMUM_DR_UP, "Maximum-Data-Rate-Upstream" },
{ BROADBAND_MAXIMUM_DR_DOWN, "Maximum-Data-Rate-Downstream" },
{ BROADBAND_MINIMUM_DR_UP_LOW_POWER, "Minimum-Data-Rate-Upstream-Low-Power" },
{ BROADBAND_MINIMUM_DR_DOWN_LOW_POWER, "Minimum-Data-Rate-Downstream-Low-Power" },
{ BROADBAND_MAXIMUM_INTERLEAVING_DELAY_UP, "Maximum-Interleaving-Delay-Upstream" },
{ BROADBAND_ACTUAL_INTERLEAVING_DELAY_UP, "Actual-Interleaving-Delay-Upstream" },
{ BROADBAND_MAXIMUM_INTERLEAVING_DELAY_DOWN, "Maximum-Interleaving-Delay-Downstream" },
{ BROADBAND_ACTUAL_INTERLEAVING_DELAY_DOWN, "Actual-Interleaving-Delay-Downstream" },
{ BROADBAND_ACCESS_LOOP_ENCAPSULATION, "Access-Loop-Encapsulation" },
{ BROADBAND_ANCP_ACCESS_LINE_TYPE, "ANCP Access Line Type" },
{ BROADBAND_IWF_SESSION, "IWF-Session" },
{ 0, NULL }
};
static const value_string cablelabs_avp_type_vals[] = {
/* 7.5.2 DEPI Specific AVPs */
{ 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" },
/* 7.5.3 QAM Channel PHY AVPs */
{ 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 Interleave Depth" },
{ 107, "Downstream QAM Channel RF Block Muting53" },
/* 7.5.4 DEPI Redundancy Capabilities AVPs */
{ 200, "DEPI Redundancy Capabilities" },
{ 0, NULL }
};
static const value_string l2tp_cablel_modulation_vals[] = {
{ 0, "64-QAM" },
{ 1, "128-QAM" },
{ 0, NULL }
};
static const value_string pw_types_vals[] = {
{ 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)" },
/* 0x000E-0x0010 Unassigned */
{ 0x0011, "Structure-agnostic E1 circuit" }, /* [RFC5611] */
{ 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] */
{ 0, NULL },
};
static const value_string ale_datalink_types_vals[] = {
{ 0x00, "ATM AAL5" },
{ 0x01, "Ethernet" },
{ 0, NULL },
};
static const value_string ale_enc1_types_vals[] = {
{ 0x00, "NA - Not Available" },
{ 0x01, "Untagged Ethernet" },
{ 0x02, "Single-Tagged Ethernet" },
{ 0, NULL },
};
static const value_string ale_enc2_types_vals[] = {
{ 0x00, "NA - Not Available" },
{ 0x01, "PPPoA LLC" },
{ 0x02, "PPPoA Null" },
{ 0x03, "IP over ATM (IPoA) LLC" },
{ 0x04, "IPoA Null" },
{ 0x05, "Ethernet over AAL5 LLC with Frame Check Sequence (FCS)" },
{ 0x06, "Ethernet over AAL5 LLC without FCS" },
{ 0x07, "Ethernet over AAL5 Null with FCS" },
{ 0x08, "Ethernet over AAL5 Null without FCS" },
{ 0, NULL },
};
static const value_string ancp_types_vals[] = {
{ 0x01, "ADSL1" },
{ 0x02, "ADSL2" },
{ 0x03, "ADSL2+" },
{ 0x04, "VDSL1" },
{ 0x05, "VDSL2" },
{ 0x06, "SDSL" },
{ 0x07, "UNKNOWN" },
{ 0, NULL },
};
static const value_string iwf_types_vals[] = {
{ 0x00, "IWF not performed" },
{ 0x01, "IWF performed" },
{ 0, NULL },
};
static const true_false_string tfs_up_down = { "Up", "Down" };
static const true_false_string tfs_new_existing = { "New", "Existing" };
static dissector_handle_t ppp_hdlc_handle;
static dissector_handle_t ppp_lcp_options_handle;
static dissector_handle_t atm_oam_handle;
static dissector_handle_t llc_handle;
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
typedef struct l2tpv3_conversation {
address lcce1;
guint16 lcce1_port;
address lcce2;
guint16 lcce2_port;
port_type pt;
struct l2tpv3_tunnel *tunnel;
} 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];
GSList *sessions;
} l2tpv3_tunnel_t;
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;
static const gchar* shared_secret = "";
static GSList *list_heads = NULL;
static void update_shared_key(l2tpv3_tunnel_t *tunnel)
{
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;
}
/* If there's no shared key in the conversation context, or the secret has been changed */
if (tunnel->shared_key_secret == NULL || strcmp(secret, tunnel->shared_key_secret) != 0) {
/* For secret specification, see RFC 3931 pg 37 */
guint8 data = 2;
md5_hmac(&data, 1, secret, strlen(secret), tunnel->shared_key);
tunnel->shared_key_secret = wmem_strdup(wmem_file_scope(), secret);
}
}
static void md5_hmac_digest(l2tpv3_tunnel_t *tunnel,
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;
int offset = 0;
if (tunnel->conv->pt == PT_NONE) /* IP encapsulated L2TPv3 */
offset = 4;
md5_hmac_init(&ms, tunnel->shared_key, L2TP_HMAC_MD5_KEY_LEN);
if (msg_type != MESSAGE_TYPE_SCCRQ) {
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);
}
}
}
md5_hmac_append(&ms, tvb_get_ptr(tvb, offset, idx + 1 - offset), idx + 1 - offset);
/* 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);
}
static void sha1_hmac_digest(l2tpv3_tunnel_t *tunnel,
tvbuff_t *tvb,
int length,
int idx,
int avp_len,
int msg_type,
packet_info *pinfo,
guint8 digest[20])
{
guint8 zero[SHA1_DIGEST_LEN];
sha1_hmac_context ms;
int remainder;
int offset = 0;
if (tunnel->conv->pt == PT_NONE) /* IP encapsulated L2TPv3 */
offset = 4;
sha1_hmac_starts(&ms, tunnel->shared_key, L2TP_HMAC_MD5_KEY_LEN);
if (msg_type != MESSAGE_TYPE_SCCRQ) {
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);
}
}
}
sha1_hmac_update(&ms, tvb_get_ptr(tvb, offset, idx + 1 - offset), idx + 1 - offset);
/* Message digest is calculated with an empty message digest field */
memset(zero, 0, 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);
}
static int check_control_digest(l2tpv3_tunnel_t *tunnel,
tvbuff_t *tvb,
int length,
int idx,
int avp_len,
int msg_type,
packet_info *pinfo)
{
guint8 digest[SHA1_DIGEST_LEN];
if (!tunnel)
return 1;
update_shared_key(tunnel);
switch (tvb_get_guint8(tvb, idx)) {
case L2TP_HMAC_MD5:
if ((avp_len - 1) != L2TP_HMAC_MD5_DIGEST_LEN)
return -1;
md5_hmac_digest(tunnel, tvb, length, idx, avp_len, msg_type, pinfo, digest);
break;
case L2TP_HMAC_SHA1:
if ((avp_len - 1) != SHA1_DIGEST_LEN)
return -1;
sha1_hmac_digest(tunnel, tvb, length, idx, avp_len, msg_type, pinfo, digest);
break;
default:
return 1;
break;
}
return tvb_memeql(tvb, idx + 1, digest, avp_len - 1);
}
static void store_cma_nonce(l2tpv3_tunnel_t *tunnel,
tvbuff_t *tvb,
int offset,
int length,
int msg_type)
{
guint8 *nonce = NULL;
if (!tunnel)
return;
switch (msg_type) {
case MESSAGE_TYPE_SCCRQ:
if (!tunnel->lcce1_nonce) {
tunnel->lcce1_nonce = (guint8 *)wmem_alloc(wmem_file_scope(), length);
tunnel->lcce1_nonce_len = length;
nonce = tunnel->lcce1_nonce;
}
break;
case MESSAGE_TYPE_SCCRP:
if (!tunnel->lcce2_nonce) {
tunnel->lcce2_nonce = (guint8 *)wmem_alloc(wmem_file_scope(), length);
tunnel->lcce2_nonce_len = length;
nonce = tunnel->lcce2_nonce;
}
break;
default:
break;
}
if (nonce)
tvb_memcpy(tvb, (void *)nonce, offset, length);
return;
}
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;
}
return;
}
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) {
session = (l2tpv3_session_t *)iterator->data;
if ((session->lcce1.id == lcce1_id) ||
(session->lcce2.id == lcce2_id)) {
return session;
}
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)
{
l2tpv3_session_t *session = wmem_new0(wmem_packet_scope(), l2tpv3_session_t);
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 = -1;
guint16 pw_type;
switch (msg_type) {
case MESSAGE_TYPE_ICRQ:
case MESSAGE_TYPE_OCRQ:
break;
default:
return session;
}
if (session == NULL)
session = alloc_session();
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;
}
session->pw_type = result;
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;
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;
}
if (session == NULL)
session = alloc_session();
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;
}
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) {
existing = wmem_new0(wmem_file_scope(), l2tpv3_session_t);
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);
}
}
static void l2tp_prompt(packet_info *pinfo _U_, gchar* result)
{
g_snprintf(result, MAX_DECODE_AS_PROMPT_LEN, "Decode L2TPv3 packet type 0x%04x as",
GPOINTER_TO_UINT(p_get_proto_data(pinfo->pool, pinfo, proto_l2tp, 0)));
}
static gpointer l2tp_value(packet_info *pinfo _U_)
{
return p_get_proto_data(pinfo->pool, pinfo, proto_l2tp, 0);
}
/*
* Dissect CISCO AVP:s
*/
static int dissect_l2tp_cisco_avps(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, guint32 ccid) {
int offset = 0;
int avp_type;
guint32 avp_vendor_id;
guint16 avp_len;
guint16 ver_len_hidden;
proto_tree *l2tp_avp_tree, *l2tp_avp_tree_sub;
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);
l2tp_avp_tree = proto_tree_add_subtree_format(tree, tvb, offset,
avp_len, ett_l2tp_avp, NULL, "Vendor %s: %s AVP",
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);
if (HIDDEN_BIT(ver_len_hidden)) { /* don't try do display hidden */
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_cisco_avp_type, tvb, offset, 2, avp_type);
offset += 2;
avp_len -= 2;
switch (avp_type) {
case CISCO_ACK:
/* process_l2tpv3_control does not set COL_INFO for vendor messages */
col_add_fstr(pinfo->cinfo, COL_INFO, "%s - Cisco ACK (tunnel id=%u)", control_msg, ccid);
break;
case CISCO_ASSIGNED_CONNECTION_ID:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_cisco_assigned_control_connection_id, tvb, offset, 4, ENC_BIG_ENDIAN);
break;
case CISCO_PW_CAPABILITY_LIST:
l2tp_avp_tree_sub = proto_tree_add_subtree(l2tp_avp_tree, tvb, offset, avp_len,
ett_l2tp_avp_sub, NULL, "Pseudowire Capabilities List");
while (avp_len >= 2) {
proto_tree_add_item(l2tp_avp_tree_sub, hf_l2tp_cisco_pw_type, tvb, offset, 2, ENC_BIG_ENDIAN);
offset += 2;
avp_len -= 2;
}
break;
case CISCO_LOCAL_SESSION_ID:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_cisco_local_session_id, tvb, offset, 4, ENC_BIG_ENDIAN);
break;
case CISCO_REMOTE_SESSION_ID:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_cisco_remote_session_id, tvb, offset, 4, ENC_BIG_ENDIAN);
break;
case CISCO_ASSIGNED_COOKIE:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_cisco_assigned_cookie, tvb, offset, avp_len, ENC_NA);
break;
case CISCO_REMOTE_END_ID:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_cisco_remote_end_id, tvb, offset, avp_len, ENC_NA|ENC_ASCII);
break;
case CISCO_PW_TYPE:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_cisco_pseudowire_type, tvb, offset, 2, ENC_BIG_ENDIAN);
break;
case CISCO_CIRCUIT_STATUS:
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);
break;
case CISCO_SESSION_TIE_BREAKER:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_cisco_tie_breaker,
tvb, offset, 8, ENC_BIG_ENDIAN);
break;
case CISCO_DRAFT_AVP_VERSION:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_cisco_draft_avp_version, tvb, offset, 2, ENC_BIG_ENDIAN);
break;
case CISCO_MESSAGE_DIGEST:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_cisco_message_digest, tvb, offset, avp_len, ENC_NA);
break;
case CISCO_AUTH_NONCE:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_cisco_nonce, tvb, offset, avp_len, ENC_NA);
break;
case CISCO_INTERFACE_MTU:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_cisco_interface_mtu, tvb, offset, avp_len, ENC_BIG_ENDIAN);
break;
default:
proto_tree_add_expert(l2tp_avp_tree, pinfo, &ei_l2tp_vendor_specific_avp_data, tvb, offset, avp_len);
break;
}
offset += avp_len;
return offset;
}
/*
* Dissect Broadband Forums AVP:s
*/
static int dissect_l2tp_broadband_avps(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree) {
int offset = 0;
int avp_type;
guint32 avp_vendor_id;
guint16 avp_len;
guint16 ver_len_hidden;
proto_tree *l2tp_avp_tree, *l2tp_avp_ale_tree;
proto_item *ta;
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);
l2tp_avp_tree = proto_tree_add_subtree_format(tree, tvb, offset,
avp_len, ett_l2tp_avp, NULL, "Vendor %s: %s AVP",
val_to_str_ext(avp_vendor_id, &sminmpec_values_ext, "Unknown (%u)"),
val_to_str(avp_type, broadband_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);
if (HIDDEN_BIT(ver_len_hidden)) { /* don't try do display hidden */
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_broadband_avp_type, tvb, offset, 2, avp_type);
offset += 2;
avp_len -= 2;
switch (avp_type) {
case BROADBAND_AGENT_CIRCUIT_ID:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_broadband_agent_circuit_id, tvb, offset, avp_len, ENC_UTF_8|ENC_NA);
break;
case BROADBAND_AGENT_REMOTE_ID:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_broadband_agent_remote_id, tvb, offset, avp_len, ENC_UTF_8|ENC_NA);
break;
case BROADBAND_ACTUAL_DR_UP:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_broadband_actual_dr_up, tvb, offset, 8, ENC_BIG_ENDIAN);
break;
case BROADBAND_ACTUAL_DR_DOWN:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_broadband_actual_dr_down, tvb, offset, 8, ENC_BIG_ENDIAN);
break;
case BROADBAND_MINIMUM_DR_UP:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_broadband_minimum_dr_up, tvb, offset, 8, ENC_BIG_ENDIAN);
break;
case BROADBAND_MINIMUM_DR_DOWN:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_broadband_minimum_dr_down, tvb, offset, 8, ENC_BIG_ENDIAN);
break;
case BROADBAND_ATTAINABLE_DR_UP:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_broadband_attainable_dr_up, tvb, offset, 8, ENC_BIG_ENDIAN);
break;
case BROADBAND_ATTAINABLE_DR_DOWN:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_broadband_attainable_dr_down, tvb, offset, 8, ENC_BIG_ENDIAN);
break;
case BROADBAND_MAXIMUM_DR_UP:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_broadband_maximum_dr_up, tvb, offset, 8, ENC_BIG_ENDIAN);
break;
case BROADBAND_MAXIMUM_DR_DOWN:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_broadband_maximum_dr_down, tvb, offset, 8, ENC_BIG_ENDIAN);
break;
case BROADBAND_MINIMUM_DR_UP_LOW_POWER:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_broadband_minimum_dr_up_low_power, tvb, offset, 8, ENC_BIG_ENDIAN);
break;
case BROADBAND_MINIMUM_DR_DOWN_LOW_POWER:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_broadband_minimum_dr_down_low_power, tvb, offset, 8, ENC_BIG_ENDIAN);
break;
case BROADBAND_MAXIMUM_INTERLEAVING_DELAY_UP:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_broadband_maximum_interleaving_delay_up, tvb, offset, 4, ENC_BIG_ENDIAN);
break;
case BROADBAND_ACTUAL_INTERLEAVING_DELAY_UP:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_broadband_actual_interleaving_delay_up, tvb, offset, 4, ENC_BIG_ENDIAN);
break;
case BROADBAND_MAXIMUM_INTERLEAVING_DELAY_DOWN:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_broadband_maximum_interleaving_delay_down, tvb, offset, 4, ENC_BIG_ENDIAN);
break;
case BROADBAND_ACTUAL_INTERLEAVING_DELAY_DOWN:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_broadband_actual_interleaving_delay_down, tvb, offset, 4, ENC_BIG_ENDIAN);
break;
case BROADBAND_ACCESS_LOOP_ENCAPSULATION:
{
ta = proto_tree_add_item(l2tp_avp_tree, hf_l2tp_broadband_access_loop_encapsulation, tvb, offset, avp_len, ENC_NA);
l2tp_avp_ale_tree = proto_item_add_subtree(ta, ett_l2tp_ale_sub);
proto_tree_add_item(l2tp_avp_ale_tree, hf_l2tp_broadband_access_loop_encapsulation_data_link, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(l2tp_avp_ale_tree, hf_l2tp_broadband_access_loop_encapsulation_enc1, tvb, offset+1, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(l2tp_avp_ale_tree, hf_l2tp_broadband_access_loop_encapsulation_enc2, tvb, offset+2, 1, ENC_BIG_ENDIAN);
}
break;
case BROADBAND_ANCP_ACCESS_LINE_TYPE:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_broadband_ancp_access_line_type, tvb, offset, avp_len, ENC_BIG_ENDIAN);
break;
case BROADBAND_IWF_SESSION:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_broadband_iwf_session, tvb, offset, avp_len, ENC_BIG_ENDIAN);
break;
default:
proto_tree_add_expert(l2tp_avp_tree, pinfo, &ei_l2tp_vendor_specific_avp_data, tvb, offset, avp_len);
break;
}
offset += avp_len;
return offset;
}
/*
* Dissect Ericsson AVP:s
*/
/* Dissect a single variable-length Ericsson Transport Configuration Group */
static int dissect_l2tp_ericsson_transp_cfg(tvbuff_t *tvb, proto_tree *tree)
{
int offset = 0;
guint32 num_sapis, i;
proto_tree_add_item(tree, hf_l2tp_ericsson_tcg_group_id, tvb, offset++, 1, ENC_NA);
proto_tree_add_item_ret_uint(tree, hf_l2tp_ericsson_tcg_num_sapis, tvb, offset++, 1, ENC_NA, &num_sapis);
for (i = 0; i < num_sapis; i++) {
proto_tree_add_item(tree, hf_l2tp_ericsson_tcg_sapi, tvb, offset++, 1, ENC_NA);
}
proto_tree_add_item(tree, hf_l2tp_ericsson_tcg_ip, tvb, offset, 4, ENC_NA);
offset += 4;
proto_tree_add_item(tree, hf_l2tp_ericsson_tcg_dscp, tvb, offset++, 1, ENC_NA);
proto_tree_add_item(tree, hf_l2tp_ericsson_tcg_crc32_enable, tvb, offset++, 1, ENC_NA);
return offset;
}
/* Dissect a single 3-byte Ericsson TEI-to-SC Map */
static int dissect_l2tp_ericsson_tei_sc_map(tvbuff_t *tvb, proto_tree *tree)
{
proto_tree_add_item(tree, hf_l2tp_ericsson_map_tei_low, tvb, 0, 1, ENC_NA);
proto_tree_add_item(tree, hf_l2tp_ericsson_map_tei_high, tvb, 1, 1, ENC_NA);
proto_tree_add_item(tree, hf_l2tp_ericsson_map_sc, tvb, 2, 1, ENC_NA);
return 3;
}
static int dissect_l2tp_ericsson_avps(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, guint32 ccid)
{
int offset = 0;
int avp_type;
guint32 avp_vendor_id;
guint16 avp_len;
guint16 ver_len_hidden;
guint32 msg_type;
guint32 num_maps, i;
proto_tree *l2tp_avp_tree, *l2tp_avp_tree_sub;
tvbuff_t *tcg_tvb;
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);
l2tp_avp_tree = proto_tree_add_subtree_format(tree, tvb, offset,
avp_len, ett_l2tp_avp, NULL, "Vendor %s: %s AVP",
val_to_str_ext(avp_vendor_id, &sminmpec_values_ext, "Unknown (%u)"),
val_to_str(avp_type, ericsson_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);
if (HIDDEN_BIT(ver_len_hidden)) { /* don't try do display hidden */
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_ericsson_avp_type, tvb, offset, 2, avp_type);
offset += 2;
avp_len -= 2;
ccid++;
switch (avp_type) {
case ERICSSON_MSG_TYPE:
proto_tree_add_item_ret_uint(l2tp_avp_tree, hf_l2tp_ericsson_msg_type, tvb, offset, 2, ENC_BIG_ENDIAN, &msg_type);
col_add_fstr(pinfo->cinfo, COL_INFO, "%s - %s", control_msg, val_to_str(msg_type, ericsson_short_msg_type_vals, "Unknown (0x%x)"));
break;
case ERICSSON_PROTO_VERSION:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_ericsson_ver_pref, tvb, offset, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_ericsson_ver_2, tvb, offset+4, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_ericsson_ver_3, tvb, offset+8, 4, ENC_BIG_ENDIAN);
break;
case ERICSSON_CONN_TYPE:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_ericsson_conn_type, tvb, offset, 1, ENC_NA);
break;
case ERICSSON_STN_NAME:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_ericsson_stn_name, tvb, offset, avp_len, ENC_ASCII|ENC_NA);
break;
case ERICSSON_CRC_ENABLED:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_ericsson_crc32_enable, tvb, offset, avp_len, ENC_NA);
break;
case ERICSSON_ABIS_LOWER_MODE:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_ericsson_abis_lower_mode, tvb, offset, 1, ENC_NA);
break;
case ERICSSON_TRANSPORT_CONFIG:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_ericsson_tc_overl_thresh, tvb, offset, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_ericsson_tc_num_groups, tvb, offset+2, 1, ENC_NA);
/* FIXME: iterate over multiple groups */
tcg_tvb = tvb_new_subset_length(tvb, offset+3, avp_len-3);
l2tp_avp_tree_sub = proto_tree_add_subtree_format(l2tp_avp_tree, tvb, 0, -1, ett_l2tp_ericsson_tcg,
NULL, "Transport Config Bundling Group");
dissect_l2tp_ericsson_transp_cfg(tcg_tvb, l2tp_avp_tree_sub);
break;
case ERICSSNN_TEI_TO_SC_MAP:
proto_tree_add_item_ret_uint(l2tp_avp_tree, hf_l2tp_ericsson_tc_num_maps, tvb, offset++, 1, ENC_NA, &num_maps);
/* iterate over multiple groups */
for (i = 0; i < num_maps; i++) {
tcg_tvb = tvb_new_subset_length(tvb, offset, 3);
l2tp_avp_tree_sub = proto_tree_add_subtree_format(l2tp_avp_tree, tvb, 0, -1, ett_l2tp_ericsson_map,
NULL, "Transport Config Bundling Group %u", i);
offset += dissect_l2tp_ericsson_tei_sc_map(tcg_tvb, l2tp_avp_tree_sub);
}
break;
default:
proto_tree_add_expert(l2tp_avp_tree, pinfo, &ei_l2tp_vendor_specific_avp_data, tvb, offset, avp_len);
break;
}
offset += avp_len;
return offset;
}
/*
* Ref: http://www.cablelabs.com/specifications/CM-SP-DEPI-I08-100611.pdf
*/
static int
dissect_l2tp_vnd_cablelabs_avps(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void *data _U_)
{
int offset = 0;
int avp_type;
guint32 avp_vendor_id;
guint32 avp_len;
guint16 ver_len_hidden;
proto_tree *l2tp_avp_tree;
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);
l2tp_avp_tree = proto_tree_add_subtree_format(tree, tvb, offset,
avp_len, ett_l2tp_avp, NULL, "Vendor %s: %s AVP",
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);
if (HIDDEN_BIT(ver_len_hidden)) { /* don't try do display hidden */
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;
while(avp_len > 0){
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;
}
break;
default:
proto_tree_add_expert(l2tp_avp_tree, pinfo, &ei_l2tp_vendor_specific_avp_data, tvb, offset, avp_len);
break;
}
offset += avp_len;
return offset;
}
/*
* Processes AVPs for Control Messages all versions and transports
*/
static void process_control_avps(tvbuff_t *tvb,
packet_info *pinfo,
proto_tree *l2tp_tree,
int idx,
int length,
guint32 ccid,
l2tpv3_tunnel_t *tunnel)
{
proto_tree *l2tp_lcp_avp_tree, *l2tp_avp_tree = NULL, *l2tp_avp_tree_sub, *l2tp_avp_csu_tree;
proto_item *tf, *te, *tc;
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);
l2tpv3_session_t *session = NULL;
l2tp_cntrl_data->ccid = ccid;
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);
if (avp_len < 6) {
proto_tree_add_expert_format(l2tp_avp_tree ? l2tp_avp_tree : l2tp_tree, pinfo, &ei_l2tp_avp_length, tvb, idx, 2, "AVP length must be >= 6, got %u", avp_len);
return;
}
if (avp_vendor_id != VENDOR_IETF) {
avp_tvb = tvb_new_subset_length(tvb, idx, avp_len);
if (avp_vendor_id == VENDOR_CISCO) { /* Vendor-Specific AVP */
dissect_l2tp_cisco_avps(avp_tvb, pinfo, l2tp_tree, ccid);
idx += avp_len;
continue;
} else if (avp_vendor_id == VENDOR_BROADBAND_FORUM) { /* Vendor-Specific AVP */
dissect_l2tp_broadband_avps(avp_tvb, pinfo, l2tp_tree);
idx += avp_len;
continue;
} else if (avp_vendor_id == VENDOR_ERICSSON) { /* Vendor-Specific AVP */
dissect_l2tp_ericsson_avps(avp_tvb, pinfo, l2tp_tree, ccid);
idx += avp_len;
continue;
} else {
/* Vendor-Specific AVP */
if (!dissector_try_uint_new(l2tp_vendor_avp_dissector_table, avp_vendor_id, avp_tvb, pinfo, l2tp_tree, FALSE, l2tp_cntrl_data)){
l2tp_avp_tree = proto_tree_add_subtree_format(l2tp_tree, tvb, idx,
avp_len, ett_l2tp_avp, NULL, "Vendor %s AVP Type %u",
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_uint(l2tp_avp_tree, hf_l2tp_avp_type, tvb, idx, 2, avp_type);
idx += 2;
proto_tree_add_expert(l2tp_avp_tree, pinfo, &ei_l2tp_vendor_specific_avp_data, tvb, idx, avp_len-6);
avp_len-=6;
}
idx += avp_len;
continue;
}
}
/* IETF AVP:s */
l2tp_avp_tree = proto_tree_add_subtree_format(l2tp_tree, tvb, idx,
avp_len, ett_l2tp_avp, NULL, "%s AVP",
val_to_str_ext(avp_type, &avp_type_vals_ext, "Unknown (%u)"));
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;
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);
l2tp_cntrl_data->msg_type = msg_type;
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) {
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_stop_ccn_result_code, tvb, idx, 2, ENC_BIG_ENDIAN);
}
else {
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_result_code, tvb, idx, 2, ENC_BIG_ENDIAN);
}
idx += 2;
avp_len -= 2;
if (avp_len < 2)
break;
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_error_code, tvb, idx, 2, ENC_BIG_ENDIAN);
idx += 2;
avp_len -= 2;
if (avp_len == 0)
break;
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_error_message, tvb, idx, avp_len, ENC_ASCII|ENC_NA);
break;
case PROTOCOL_VERSION:
if (avp_len < 1)
break;
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_protocol_version, tvb, idx, 1, ENC_BIG_ENDIAN);
idx += 1;
avp_len -= 1;
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_protocol_revision, tvb, idx, 1, ENC_BIG_ENDIAN);
break;
case FRAMING_CAPABILITIES:
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);
break;
case BEARER_CAPABILITIES:
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);
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:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_firmware_revision, tvb, idx, 2, ENC_BIG_ENDIAN);
break;
case HOST_NAME:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_host_name, tvb, idx, avp_len, ENC_NA|ENC_ASCII);
break;
case VENDOR_NAME:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_vendor_name, tvb, idx, avp_len, ENC_NA|ENC_ASCII);
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:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_receive_window_size, tvb, idx, 2, ENC_BIG_ENDIAN);
break;
case CHALLENGE:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_chap_challenge, tvb, idx, avp_len, ENC_NA);
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;
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_cause_code, tvb, idx, 2, ENC_BIG_ENDIAN);
idx += 2;
avp_len -= 2;
if (avp_len < 1)
break;
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_cause_msg, tvb, idx, 1, ENC_BIG_ENDIAN);
idx += 1;
avp_len -= 1;
if (avp_len == 0)
break;
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_advisory_msg, tvb, idx, avp_len, ENC_NA|ENC_ASCII);
break;
case CHALLENGE_RESPONSE:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_chap_challenge_response, tvb, idx, 16, ENC_NA);
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:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_call_serial_number, tvb, idx, 4, ENC_BIG_ENDIAN);
break;
case MINIMUM_BPS:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_minimum_bps, tvb, idx, 4, ENC_BIG_ENDIAN);
break;
case MAXIMUM_BPS:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_maximum_bps, tvb, idx, 4, ENC_BIG_ENDIAN);
break;
case BEARER_TYPE:
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);
break;
case FRAMING_TYPE:
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);
break;
case CALLED_NUMBER:
if (avp_len == 0)
break;
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_called_number,
tvb, idx, avp_len, ENC_ASCII|ENC_NA);
break;
case CALLING_NUMBER:
if (avp_len == 0)
break;
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_calling_number,
tvb, idx, avp_len, ENC_ASCII|ENC_NA);
break;
case SUB_ADDRESS:
if (avp_len == 0)
break;
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_sub_address, tvb, idx, avp_len, ENC_NA|ENC_ASCII);
break;
case TX_CONNECT_SPEED:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_connect_speed, tvb, idx, 4, ENC_BIG_ENDIAN);
break;
case PHYSICAL_CHANNEL:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_physical_channel, tvb, idx, 4, ENC_BIG_ENDIAN);
break;
case INITIAL_RECEIVED_LCP_CONFREQ:
te = proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_initial_received_lcp_confreq, tvb, idx, avp_len, ENC_NA);
l2tp_lcp_avp_tree = proto_item_add_subtree(te, ett_l2tp_lcp);
next_tvb = tvb_new_subset_length(tvb, idx, avp_len);
call_dissector(ppp_lcp_options_handle, next_tvb, pinfo, l2tp_lcp_avp_tree );
break;
case LAST_SENT_LCP_CONFREQ:
te = proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_last_sent_lcp_confreq, tvb, idx, avp_len, ENC_NA);
l2tp_lcp_avp_tree = proto_item_add_subtree(te, ett_l2tp_lcp);
next_tvb = tvb_new_subset_length(tvb, idx, avp_len);
call_dissector(ppp_lcp_options_handle, next_tvb, pinfo, l2tp_lcp_avp_tree );
break;
case LAST_RECEIVED_LCP_CONFREQ:
te = proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_last_received_lcp_confreq, tvb, idx, avp_len, ENC_NA);
l2tp_lcp_avp_tree = proto_item_add_subtree(te, ett_l2tp_lcp);
next_tvb = tvb_new_subset_length(tvb, idx, avp_len);
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);
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_proxy_authen_type, tvb, idx, 2, ENC_BIG_ENDIAN);
break;
case PROXY_AUTHEN_NAME:
if (avp_len == 0)
break;
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_proxy_authen_name, tvb, idx, avp_len, ENC_NA|ENC_ASCII);
break;
case PROXY_AUTHEN_CHALLENGE:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_proxy_authen_challenge, tvb, idx, avp_len, ENC_NA);
break;
case PROXY_AUTHEN_ID:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_proxy_authen_id, tvb, idx + 1, 1, ENC_BIG_ENDIAN);
break;
case PROXY_AUTHEN_RESPONSE:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_proxy_authen_response, tvb, idx, avp_len, ENC_NA);
break;
case CALL_STATUS_AVPS:
if (avp_len < 2)
break;
idx += 2;
avp_len -= 2;
if (avp_len < 4)
break;
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_crc_errors, tvb, idx, 4, ENC_BIG_ENDIAN);
idx += 4;
avp_len -= 4;
if (avp_len < 4)
break;
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_framing_errors, tvb, idx, 4, ENC_BIG_ENDIAN);
idx += 4;
avp_len -= 4;
if (avp_len < 4)
break;
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_hardware_overruns, tvb, idx, 4, ENC_BIG_ENDIAN);
idx += 4;
avp_len -= 4;
if (avp_len < 4)
break;
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_buffer_overruns, tvb, idx, 4, ENC_BIG_ENDIAN);
idx += 4;
avp_len -= 4;
if (avp_len < 4)
break;
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_time_out_errors, tvb, idx, 4, ENC_BIG_ENDIAN);
idx += 4;
avp_len -= 4;
if (avp_len < 4)
break;
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_alignment_errors, tvb, idx, 4, ENC_BIG_ENDIAN);
idx += 4;
avp_len -= 4;
break;
case ACCM:
if (avp_len < 2)
break;
idx += 2;
avp_len -= 2;
if (avp_len < 4)
break;
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_send_accm, tvb, idx, 4, ENC_BIG_ENDIAN);
idx += 4;
avp_len -= 4;
if (avp_len < 4)
break;
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_receive_accm, tvb, idx, 4, ENC_BIG_ENDIAN);
idx += 4;
avp_len -= 4;
break;
case RANDOM_VECTOR:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_random_vector, tvb, idx, avp_len, ENC_NA);
break;
case PRIVATE_GROUP_ID:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_private_group_id, tvb, idx, avp_len, ENC_NA);
break;
case RX_CONNECT_SPEED:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_rx_connect_speed, tvb, idx, 4, ENC_BIG_ENDIAN);
break;
case PPP_DISCONNECT_CAUSE_CODE:
if (avp_len < 2)
break;
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_disconnect_code, tvb, idx, 2, ENC_BIG_ENDIAN);
idx += 2;
avp_len -= 2;
if (avp_len < 2)
break;
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_control_protocol_number, tvb, idx, 2, ENC_BIG_ENDIAN);
idx += 2;
avp_len -= 2;
if (avp_len < 1)
break;
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_cause_code_direction, tvb, idx, 1, ENC_BIG_ENDIAN);
idx += 1;
avp_len -= 1;
if (avp_len == 0)
break;
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_cause_code_message, tvb, idx, avp_len, ENC_NA|ENC_ASCII);
break;
case MESSAGE_DIGEST:
{
digest_idx = idx;
digest_avp_len = avp_len;
digest_item = proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_message_digest, tvb, idx, avp_len, ENC_NA);
break;
}
case ROUTER_ID:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_router_id, tvb, idx, 4, ENC_BIG_ENDIAN);
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);
store_ccid(tunnel, tvb, idx, msg_type);
break;
case PW_CAPABILITY_LIST:
l2tp_avp_tree_sub = proto_tree_add_subtree(l2tp_avp_tree, tvb, idx, avp_len,
ett_l2tp_avp_sub, NULL, "Pseudowire Capabilities List");
while (avp_len >= 2) {
proto_tree_add_item(l2tp_avp_tree_sub, hf_l2tp_avp_pw_type, tvb, idx, 2, ENC_BIG_ENDIAN);
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);
col_append_fstr(pinfo->cinfo,COL_INFO, ", LSID: %2u",
tvb_get_ntohl(tvb, idx));
session = store_lsession_id(session, tvb, idx, msg_type);
break;
case REMOTE_SESSION_ID:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_remote_session_id,
tvb, idx, 4, ENC_BIG_ENDIAN);
col_append_fstr(pinfo->cinfo,COL_INFO, ", RSID: %2u",
tvb_get_ntohl(tvb, idx));
session = store_rsession_id(session, tvb, idx, msg_type);
break;
case ASSIGNED_COOKIE:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_assigned_cookie, tvb, idx, avp_len, ENC_NA);
session = store_cookie_len(session, avp_len, msg_type);
break;
case REMOTE_END_ID:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_remote_end_id, tvb, idx, avp_len, ENC_NA|ENC_ASCII);
break;
case PW_TYPE:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_pseudowire_type, tvb, idx, 2, ENC_BIG_ENDIAN);
session = store_pw_type(session, tvb, idx, msg_type);
break;
case L2_SPECIFIC_SUBLAYER:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_layer2_specific_sublayer, tvb, idx, 2, ENC_BIG_ENDIAN);
session = store_l2_sublayer(session, tvb, idx, msg_type);
break;
case DATA_SEQUENCING:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_data_sequencing, tvb, idx, 2, ENC_BIG_ENDIAN);
break;
case CIRCUIT_STATUS:
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);
break;
case PREFERRED_LANGUAGE:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_preferred_language, tvb, idx, avp_len, ENC_NA|ENC_ASCII);
break;
case CTL_MSG_AUTH_NONCE:
proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_nonce, tvb, idx, avp_len, ENC_NA);
store_cma_nonce(tunnel, tvb, idx, avp_len, msg_type);
break;
case TX_CONNECT_SPEED_V3:
{
guint64 speed;
if (avp_len < 8)
break;
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)");
}
break;
}
case RX_CONNECT_SPEED_V3:
{
guint64 speed;
if (avp_len < 8)
break;
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)");
}
break;
}
case CONNECT_SPEED_UPDATE:
{
tc = proto_tree_add_item(l2tp_avp_tree, hf_l2tp_avp_csu, tvb, idx, avp_len, ENC_NA);
l2tp_avp_csu_tree = proto_item_add_subtree(tc, ett_l2tp_csu);
if (avp_len == 12) {
/* L2TPv2 */
proto_tree_add_item(l2tp_avp_csu_tree, hf_l2tp_avp_csu_res, tvb, idx, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(l2tp_avp_csu_tree, hf_l2tp_avp_csu_remote_session_id_v2, tvb, idx+2, 2, ENC_BIG_ENDIAN);
proto_tree_add_item(l2tp_avp_csu_tree, hf_l2tp_avp_csu_current_tx_speed_v2, tvb, idx+4, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(l2tp_avp_csu_tree, hf_l2tp_avp_csu_current_rx_speed_v2, tvb, idx+8, 4, ENC_BIG_ENDIAN);
}
else if (avp_len == 20) {
/* L2TPv3 */
proto_tree_add_item(l2tp_avp_csu_tree, hf_l2tp_avp_csu_remote_session_id_v3, tvb, idx, 4, ENC_BIG_ENDIAN);
proto_tree_add_item(l2tp_avp_csu_tree, hf_l2tp_avp_csu_current_tx_speed_v3, tvb, idx+4, 8, ENC_BIG_ENDIAN);
proto_tree_add_item(l2tp_avp_csu_tree, hf_l2tp_avp_csu_current_rx_speed_v3, tvb, idx+12, 8, ENC_BIG_ENDIAN);
}
break;
}
default:
if(avp_len>0)
proto_tree_add_expert(l2tp_avp_tree, pinfo, &ei_l2tp_vendor_specific_avp_data, tvb, idx, avp_len);
break;
}
idx += avp_len;
}
/* 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)
expert_add_info(pinfo, digest_item, &ei_l2tp_incorrect_digest);
}
update_session(tunnel, session);
}
/*
* 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.
*/
static void
process_l2tpv3_data(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
proto_tree *l2tp_tree, proto_item *l2tp_item, int *pIdx,
l2tpv3_tunnel_t *tunnel)
{
int idx = *pIdx;
int sid;
guint32 oam_cell = 0;
proto_tree *l2_specific = NULL;
proto_item *ti = NULL;
tvbuff_t *next_tvb;
gint cookie_len = l2tpv3_cookie;
gint l2_spec = l2tpv3_l2_specific;
gint pw_type = -1;
lcce_settings_t *lcce = NULL;
l2tpv3_session_t *session = NULL;
/* Get Session ID */
sid = tvb_get_ntohl(tvb, idx);
idx += 4;
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;
col_add_fstr(pinfo->cinfo,COL_INFO,
"%s (session id=%u)",
data_msg, sid);
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;
if (cookie_len != 0)
proto_tree_add_item(l2tp_tree, hf_l2tp_cookie, tvb, idx, cookie_len, ENC_NA);
}
switch(l2_spec){
case L2TPv3_L2_SPECIFIC_DEFAULT:
if (tree) {
ti = proto_tree_add_item(tree, hf_l2tp_l2_spec_def,
tvb, idx + cookie_len, 4, ENC_NA);
l2_specific = proto_item_add_subtree(ti, ett_l2tp_l2_spec);
proto_tree_add_item(l2_specific, hf_l2tp_l2_spec_s, tvb, idx + cookie_len,
1, ENC_BIG_ENDIAN);
proto_tree_add_item(l2_specific, hf_l2tp_l2_spec_sequence, tvb,
idx + cookie_len + 1, 3, ENC_BIG_ENDIAN);
}
next_tvb = tvb_new_subset_remaining(tvb, idx + cookie_len + 4);
break;
case L2TPv3_L2_SPECIFIC_DOCSIS_DMPT:
if (tree) {
ti = proto_tree_add_item(tree, hf_l2tp_l2_spec_docsis_dmpt,
tvb, idx + cookie_len, 4, ENC_NA);
l2_specific = proto_item_add_subtree(ti, ett_l2tp_l2_spec);
proto_tree_add_item(l2_specific, hf_l2tp_l2_spec_v, tvb,
idx + cookie_len,1, ENC_BIG_ENDIAN);
proto_tree_add_item(l2_specific, hf_l2tp_l2_spec_s, tvb,
idx + cookie_len,1, ENC_BIG_ENDIAN);
proto_tree_add_item(l2_specific, hf_l2tp_l2_spec_h, tvb,
idx + cookie_len,1, ENC_BIG_ENDIAN);
proto_tree_add_item(l2_specific, hf_l2tp_l2_spec_flow_id, tvb,
idx + cookie_len,1, ENC_BIG_ENDIAN);
proto_tree_add_item(l2_specific, hf_l2tp_l2_spec_sequence, tvb,
idx + cookie_len + 2,2, ENC_BIG_ENDIAN);
}
next_tvb = tvb_new_subset_remaining(tvb, idx + cookie_len + 4);
break;
case L2TPv3_L2_SPECIFIC_ATM:
if (tree) {
ti = proto_tree_add_item(tree, hf_l2tp_l2_spec_atm,
tvb, idx + cookie_len, 4, ENC_NA);
l2_specific = proto_item_add_subtree(ti, ett_l2tp_l2_spec);
proto_tree_add_item(l2_specific, hf_l2tp_l2_spec_s, tvb, idx + cookie_len,
1, ENC_BIG_ENDIAN);
proto_tree_add_item(l2_specific, hf_l2tp_l2_spec_t, tvb, idx + cookie_len,
1, ENC_BIG_ENDIAN);
/*
* As per RFC 4454, the T bit specifies whether
* we're transporting an OAM cell or an AAL5 frame.
*/
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,
1, ENC_BIG_ENDIAN);
proto_tree_add_item(l2_specific, hf_l2tp_l2_spec_c, tvb, idx + cookie_len,
1, ENC_BIG_ENDIAN);
proto_tree_add_item(l2_specific, hf_l2tp_l2_spec_u, tvb, idx + cookie_len,
1, ENC_BIG_ENDIAN);
proto_tree_add_item(l2_specific, hf_l2tp_l2_spec_sequence, tvb,
idx + cookie_len + 1, 3, ENC_BIG_ENDIAN);
}
next_tvb = tvb_new_subset_remaining(tvb, idx + cookie_len + 4);
break;
case L2TPv3_L2_SPECIFIC_LAPD:
if (tree)
proto_tree_add_item(tree, hf_l2tp_lapd_info, tvb, idx + cookie_len + 4, 3, ENC_NA);
next_tvb = tvb_new_subset_remaining(tvb, idx + cookie_len+4+3);
break;
case L2TPv3_L2_SPECIFIC_NONE:
default:
next_tvb = tvb_new_subset_remaining(tvb, idx + cookie_len);
break;
}
p_add_proto_data(pinfo->pool, pinfo, proto_l2tp, 0, GUINT_TO_POINTER((guint)pw_type));
if (!dissector_try_uint_new(pw_type_table, pw_type, next_tvb, pinfo, tree, FALSE, GUINT_TO_POINTER(oam_cell)))
{
call_data_dissector(next_tvb, pinfo, tree);
}
}
static const int * l2tp_control_fields[] = {
&hf_l2tp_type,
&hf_l2tp_length_bit,
&hf_l2tp_seq_bit,
&hf_l2tp_version,
NULL
};
/*
* Processes v3 data message over UDP, to then call process_l2tpv3_data
* from the common part (Session ID)
*/
static void
process_l2tpv3_data_udp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
l2tpv3_conversation_t *l2tp_conv)
{
proto_tree *l2tp_tree, *ctrl_tree;
proto_item *l2tp_item;
int idx = 4; /* skip to sid */
int sid;
sid = tvb_get_ntohl(tvb, idx);
l2tp_item = proto_tree_add_item(tree, proto_l2tp, tvb, 0, -1, ENC_NA);
l2tp_tree = proto_item_add_subtree(l2tp_item, ett_l2tp);
if (tree) {
proto_item_append_text(l2tp_item, " version 3");
ctrl_tree = proto_tree_add_subtree_format(l2tp_tree, tvb, 0, 2,
ett_l2tp_ctrl, NULL, "Packet Type: %s Session Id=%u",
data_msg, sid);
proto_tree_add_bitmask_list(ctrl_tree, tvb, 0, 2, l2tp_control_fields, ENC_BIG_ENDIAN);
/* 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) */
process_l2tpv3_data(tvb, pinfo, tree, l2tp_tree, l2tp_item, &idx, l2tp_conv->tunnel);
}
/*
* Processes v3 data message over IP, to then call process_l2tpv3_data
* from the common part (Session ID)
*/
static void
process_l2tpv3_data_ip(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
l2tpv3_conversation_t *l2tp_conv)
{
proto_tree *l2tp_tree;
proto_item *l2tp_item;
int idx = 0;
int sid;
sid = tvb_get_ntohl(tvb, idx);
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");
proto_tree_add_uint_format(l2tp_tree, hf_l2tp_session_id, tvb, 0, 4, sid, "Packet Type: %s Session Id=%u", data_msg, sid);
/* Call process_l2tpv3_data from Session ID (offset in idx of 0) */
process_l2tpv3_data(tvb, pinfo, tree, l2tp_tree, l2tp_item, &idx, l2tp_conv->tunnel);
}
/*
* Processes v3 Control Message over IP, that carries NULL Session ID
* to then call process_control_avps after dissecting the control.
*/
static void
process_l2tpv3_control(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int baseIdx,
l2tpv3_conversation_t *l2tp_conv)
{
proto_tree *l2tp_tree = NULL, *ctrl_tree;
proto_item *l2tp_item = NULL;
int idx = baseIdx;
int tmp_idx;
guint16 length = 0; /* Length field */
guint32 ccid = 0; /* Control Connection ID */
guint16 vendor_id = 0;
guint16 avp_type;
guint16 msg_type;
guint16 control = 0;
l2tpv3_tunnel_t *tunnel = NULL;
l2tpv3_tunnel_t tmp_tunnel;
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;
tmp_idx = idx;
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;
}
tmp_idx+=2;
vendor_id = tvb_get_ntohs(tvb, tmp_idx);
tmp_idx+=2;
avp_type = tvb_get_ntohs(tvb, tmp_idx);
tmp_idx += 2;
/* 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 ,
val_to_str_ext(msg_type, &l2tp_message_type_short_str_vals_ext, "Unknown (%u)"),
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);
}
}
}
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);
}
ctrl_tree = proto_tree_add_subtree_format(l2tp_tree, tvb, baseIdx, 2,
ett_l2tp_ctrl, NULL, "Packet Type: %s Control Connection Id=%u",
(CONTROL_BIT(control) ? control_msg : data_msg), ccid);
proto_tree_add_bitmask_list(ctrl_tree, tvb, baseIdx, 2, l2tp_control_fields, ENC_BIG_ENDIAN);
}
idx = baseIdx + 2;
if (LENGTH_BIT(control)) {
proto_tree_add_item(l2tp_tree, hf_l2tp_length, tvb, idx, 2, ENC_BIG_ENDIAN);
idx += 2;
}
proto_tree_add_item(l2tp_tree, hf_l2tp_ccid, tvb, idx, 4, ENC_BIG_ENDIAN);
idx += 4;
if (SEQUENCE_BIT(control)) {
proto_tree_add_item(l2tp_tree, hf_l2tp_Ns, tvb, idx, 2, ENC_BIG_ENDIAN);
idx += 2;
proto_tree_add_item(l2tp_tree, hf_l2tp_Nr, tvb, idx, 2, ENC_BIG_ENDIAN);
idx += 2;
}
if (tree && (LENGTH_BIT(control))&&(length==12)) {
proto_tree_add_item(l2tp_tree, hf_l2tp_zero_length_body_message, tvb, 0, 0, ENC_NA);
} 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;
copy_address_wmem(wmem_file_scope(), &tunnel->lcce1, &pinfo->src);
copy_address_wmem(wmem_file_scope(), &tunnel->lcce2, &pinfo->dst);
}
}
}
if (!LENGTH_BIT(control)) {
return;
}
if (tunnel == NULL) {
tunnel = l2tp_conv->tunnel;
}
process_control_avps(tvb, pinfo, l2tp_tree, idx, length+baseIdx, ccid, tunnel);
if (tunnel == &tmp_tunnel && l2tp_conv->tunnel == NULL) {
l2tp_conv->tunnel = wmem_new0(wmem_file_scope(), l2tpv3_tunnel_t);
memcpy(l2tp_conv->tunnel, &tmp_tunnel, sizeof(l2tpv3_tunnel_t));
}
}
/*
* Dissector for L2TP over UDP. For v2, calls process_control_avps for
* 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.
*/
static int
dissect_l2tp_udp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
proto_tree *l2tp_tree, *ctrl_tree;
proto_item *l2tp_item;
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;
conversation_t *conv = NULL;
l2tpv3_conversation_t *l2tp_conv = NULL;
/*
* 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.
*/
if (tvb_captured_length(tvb) < 2)
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;
}
conv = find_conversation(pinfo->num, &pinfo->src, &pinfo->dst, PT_UDP,
pinfo->srcport, pinfo->destport, NO_PORT_B);
if (conv == NULL) {
conv = find_conversation(pinfo->num, &pinfo->src, &pinfo->dst, PT_UDP,
pinfo->srcport, pinfo->destport, 0);
}
if ((conv == NULL) || (conversation_get_dissector(conv, pinfo->num) != l2tp_udp_handle)) {
conv = conversation_new(pinfo->num, &pinfo->src, &pinfo->dst, PT_UDP,
pinfo->srcport, 0, NO_PORT2);
conversation_set_dissector(conv, l2tp_udp_handle);
}
col_set_str(pinfo->cinfo, COL_PROTOCOL, "L2TP");
col_clear(pinfo->cinfo, COL_INFO);
switch (L2TP_VERSION(control)) {
case 2:
break;
case 3:
l2tp_conv = (l2tpv3_conversation_t *)conversation_get_proto_data(conv, proto_l2tp);
if (!l2tp_conv) {
l2tp_conv = wmem_new0(wmem_file_scope(), l2tpv3_conversation_t);
l2tp_conv->pt = PT_UDP;
conversation_add_proto_data(conv, proto_l2tp, (void *)l2tp_conv);
}
col_set_str(pinfo->cinfo, COL_PROTOCOL, "L2TPv3");
if (CONTROL_BIT(control)) {
/* Call to process l2tp v3 control message */
process_l2tpv3_control(tvb, pinfo, tree, 0, l2tp_conv);
}
else {
/* Call to process l2tp v3 data message */
process_l2tpv3_data_udp(tvb, pinfo, tree, l2tp_conv);
}
return tvb_reported_length(tvb);
}
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);
if (CONTROL_BIT(control)) {
/* CONTROL MESSAGE */
tmp_idx = idx;
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;
}
tmp_idx+=4;
avp_type = tvb_get_ntohs(tvb, (tmp_idx+=2));
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,
val_to_str_ext(msg_type, &l2tp_message_type_short_str_vals_ext, "Unknown (%u)"),
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);
}
}
}
else {
/* DATA Message */
col_add_fstr(pinfo->cinfo, COL_INFO,
"%s (tunnel id=%u, session id=%u)",
data_msg, tid, cid);
}
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);
}
l2tp_item = proto_tree_add_item(tree,proto_l2tp, tvb, 0, -1, ENC_NA);
l2tp_tree = proto_item_add_subtree(l2tp_item, ett_l2tp);
if (tree) {
static const int * control_fields[] = {
&hf_l2tp_type,
&hf_l2tp_length_bit,
&hf_l2tp_seq_bit,
&hf_l2tp_offset_bit,
&hf_l2tp_priority,
&hf_l2tp_version,
NULL
};
ctrl_tree = proto_tree_add_subtree_format(l2tp_tree, tvb, 0, 2, ett_l2tp_ctrl, NULL,
"Packet Type: %s Tunnel Id=%d Session Id=%d",
(CONTROL_BIT(control) ? control_msg : data_msg), tid, cid);
proto_tree_add_bitmask_list(ctrl_tree, tvb, 0, 2, control_fields, ENC_BIG_ENDIAN);
}
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_item(l2tp_tree, hf_l2tp_offset_padding, tvb, idx, offset_size, ENC_NA);
}
idx += offset_size;
}
}
if (tree && (LENGTH_BIT(control))&&(length==12)) {
proto_tree_add_item(l2tp_tree, hf_l2tp_zero_length_body_message, tvb, 0, 0, ENC_NA);
}
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);
}
return tvb_reported_length(tvb);
}
if (LENGTH_BIT(control))
process_control_avps(tvb, pinfo, l2tp_tree, idx, length, -1, NULL);
return tvb_reported_length(tvb);
}
/*
* 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
*/
static int
dissect_l2tp_ip(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
int idx = 0;
guint32 sid; /* Session ID */
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) {
l2tp_conv = wmem_new0(wmem_file_scope(), l2tpv3_conversation_t);
l2tp_conv->pt = PT_NONE;
conversation_add_proto_data(conv, proto_l2tp, (void *)l2tp_conv);
}
/* 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 */
process_l2tpv3_control(tvb, pinfo, tree, 4, l2tp_conv);
}
else {
/* Call to process l2tp v3 data message */
process_l2tpv3_data_ip(tvb, pinfo, tree, l2tp_conv);
}
return tvb_captured_length(tvb);
}
static int dissect_atm_oam_llc(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data)
{
guint32 oam_cell = GPOINTER_TO_UINT(data);
if (oam_cell) {
call_dissector(atm_oam_handle, tvb, pinfo, tree);
} else {
call_dissector(llc_handle, tvb, pinfo, tree);
}
return tvb_captured_length(tvb);
}
static void l2tp_cleanup(void)
{
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;
}
}
/* registration with the filtering engine */
void
proto_register_l2tp(void)
{
static hf_register_info hf[] = {
{ &hf_l2tp_type,
{ "Type", "l2tp.type", FT_UINT16, BASE_DEC, VALS(l2tp_type_vals), 0x8000,
"Type bit", HFILL }},
{ &hf_l2tp_length_bit,
{ "Length Bit", "l2tp.length_bit", FT_BOOLEAN, 16, TFS(&l2tp_length_bit_truth), 0x4000,
NULL, HFILL }},
{ &hf_l2tp_seq_bit,
{ "Sequence Bit", "l2tp.seq_bit", FT_BOOLEAN, 16, TFS(&l2tp_seq_bit_truth), 0x0800,
NULL, HFILL }},
{ &hf_l2tp_offset_bit,
{ "Offset bit", "l2tp.offset_bit", FT_BOOLEAN, 16, TFS(&l2tp_offset_bit_truth), 0x0200,
NULL, HFILL }},
{ &hf_l2tp_priority,
{ "Priority", "l2tp.priority", FT_BOOLEAN, 16, TFS(&l2tp_priority_truth), 0x0100,
"Priority bit", HFILL }},
{ &hf_l2tp_version,
{ "Version", "l2tp.version", FT_UINT16, BASE_DEC, NULL, 0x000f,
NULL, HFILL }},
{ &hf_l2tp_length,
{ "Length","l2tp.length", FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_l2tp_tunnel,
{ "Tunnel ID","l2tp.tunnel", FT_UINT16, BASE_DEC, NULL, 0x0, /* Probably should be FT_BYTES */
NULL, HFILL }},
{ &hf_l2tp_session,
{ "Session ID","l2tp.session", FT_UINT16, BASE_DEC, NULL, 0x0, /* Probably should be FT_BYTES */
NULL, HFILL }},
{ &hf_l2tp_Ns,
{ "Ns","l2tp.Ns", FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_l2tp_Nr,
{ "Nr","l2tp.Nr", FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_l2tp_offset,
{ "Offset","l2tp.offset", FT_UINT16, BASE_DEC, NULL, 0x0,
"Number of octets past the L2TP header at which the payload data starts.", HFILL }},
{ &hf_l2tp_avp_mandatory,
{ "Mandatory", "l2tp.avp.mandatory", FT_BOOLEAN, 16, NULL, 0x8000,
NULL, HFILL }},
{ &hf_l2tp_avp_hidden,
{ "Hidden", "l2tp.avp.hidden", FT_BOOLEAN, 16, NULL, 0x4000,
NULL, HFILL }},
{ &hf_l2tp_avp_length,
{ "Length", "l2tp.avp.length", FT_UINT16, BASE_DEC, NULL, 0x03ff,
NULL, HFILL }},
{ &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,
{ "AVP Type", "l2tp.avp.type", FT_UINT16, BASE_DEC|BASE_EXT_STRING, &avp_type_vals_ext, 0,
NULL, HFILL }},
{ &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 }},
{ &hf_l2tp_l2_spec_h,
{ "H-bits","l2tp.l2_spec_h", FT_UINT8, BASE_HEX, NULL, 0x30,
"Extended Header Bits", HFILL }},
{ &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 }},
{ &hf_l2tp_ericsson_avp_type,
{ "Type", "l2tp.avp.ericssontype", FT_UINT16, BASE_DEC, VALS(ericsson_avp_type_vals), 0,
"AVP Type", HFILL }},
{ &hf_l2tp_broadband_avp_type,
{ "Type", "l2tp.avp.broadbandtype", FT_UINT16, BASE_DEC, VALS(broadband_avp_type_vals), 0,
"AVP Type", HFILL }},
{ &hf_l2tp_cablelabs_avp_type,
{ "Type", "l2tp.avp.cablelabstype", FT_UINT16, BASE_DEC, VALS(cablelabs_avp_type_vals), 0,
"AVP Type", HFILL }},
{ &hf_l2tp_avp_message_type,
{ "Message Type", "l2tp.avp.message_type", FT_UINT16, BASE_DEC|BASE_EXT_STRING, &message_type_vals_ext, 0,
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 }},
{ &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 }},
{ &hf_l2tp_cisco_tie_breaker,
{ "Tie Breaker", "l2tp.cisco.tie_breaker", FT_UINT64, BASE_HEX, NULL, 0,
NULL, HFILL }},
{ &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 }},
{ &hf_l2tp_cablel_avp_frequency,
{ "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 }},
{ &hf_l2tp_broadband_agent_circuit_id,
{ "Agent Circuit ID", "l2tp.broadband.agent_circuit_id", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_l2tp_broadband_agent_remote_id,
{ "Agent Remote ID", "l2tp.broadband.agent_remote_id", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_l2tp_broadband_actual_dr_up,
{ "Actual Data Rate Upstream", "l2tp.broadband.actual_dr_up", FT_UINT64, BASE_DEC, NULL, 0x0,
"Actual Data Rate Upstream in bits per seconds", HFILL }},
{ &hf_l2tp_broadband_actual_dr_down,
{ "Actual Data Rate Downstream", "l2tp.broadband.actual_dr_down", FT_UINT64, BASE_DEC, NULL, 0x0,
"Actual Data Rate Downstream in bits per seconds", HFILL }},
{ &hf_l2tp_broadband_minimum_dr_up,
{ "Minimum Data Rate Upstream", "l2tp.broadband.minimum_dr_up", FT_UINT64, BASE_DEC, NULL, 0x0,
"Minimum Data Rate Upstream in bits per seconds", HFILL }},
{ &hf_l2tp_broadband_minimum_dr_down,
{ "Minimum Data Rate Downstream", "l2tp.broadband.minimum_dr_down", FT_UINT64, BASE_DEC, NULL, 0x0,
"Minimum Data Rate Downstream in bits per seconds", HFILL }},
{ &hf_l2tp_broadband_attainable_dr_up,
{ "Attainable Data Rate Upstream", "l2tp.broadband.attainable_dr_up", FT_UINT64, BASE_DEC, NULL, 0x0,
"Attainable Data Rate Upstream in bits per seconds", HFILL }},
{ &hf_l2tp_broadband_attainable_dr_down,
{ "Attainable Data Rate Downstream", "l2tp.broadband.attainable_dr_down", FT_UINT64, BASE_DEC, NULL, 0x0,
"Attainable Data Rate Downstream in bits per seconds", HFILL }},
{ &hf_l2tp_broadband_maximum_dr_up,
{ "Maximum Data Rate Upstream", "l2tp.broadband.maximum_dr_up", FT_UINT64, BASE_DEC, NULL, 0x0,
"Maximum Data Rate Upstream in bits per seconds", HFILL }},
{ &hf_l2tp_broadband_maximum_dr_down,
{ "Maximum Data Rate Downstream", "l2tp.broadband.maximum_dr_down", FT_UINT64, BASE_DEC, NULL, 0x0,
"Maximum Data Rate Downstream in bits per seconds", HFILL }},
{ &hf_l2tp_broadband_minimum_dr_up_low_power,
{ "Minimum Data Rate Upstream Low-Power", "l2tp.broadband.minimum_dr_up_low_power", FT_UINT64, BASE_DEC, NULL, 0x0,
"Minimum Data Rate Upstream Low-Power in bits per seconds", HFILL }},
{ &hf_l2tp_broadband_minimum_dr_down_low_power,
{ "Minimum Data Rate Downstream Low-Power", "l2tp.broadband.minimum_dr_down_low_power", FT_UINT64, BASE_DEC, NULL, 0x0,
"Minimum Data Rate Downstream Low-Power in bits per seconds", HFILL }},
{ &hf_l2tp_broadband_maximum_interleaving_delay_up,
{ "Maximum Interleaving Dalay Upstream", "l2tp.broadband.maximum_interleaving_delay_up", FT_UINT32, BASE_DEC, NULL, 0x0,
"Maximum Interleaving Dalay Upstream in ms", HFILL }},
{ &hf_l2tp_broadband_actual_interleaving_delay_up,
{ "Actual Interleaving Dalay Upstream", "l2tp.broadband.actual_interleaving_delay_up", FT_UINT32, BASE_DEC, NULL, 0x0,
"Actual Interleaving Dalay Upstream in ms", HFILL }},
{ &hf_l2tp_broadband_maximum_interleaving_delay_down,
{ "Maximum Interleaving Dalay Downstream", "l2tp.broadband.maximum_interleaving_delay_down", FT_UINT32, BASE_DEC, NULL, 0x0,
"Maximum Interleaving Dalay Downstream in ms", HFILL }},
{ &hf_l2tp_broadband_actual_interleaving_delay_down,
{ "Actual Interleaving Dalay Downstream", "l2tp.broadband.actual_interleaving_delay_down", FT_UINT32, BASE_DEC, NULL, 0x0,
"Actual Interleaving Dalay Downstream in ms", HFILL }},
{ &hf_l2tp_broadband_access_loop_encapsulation,
{ "Access Loop Encapsulation", "l2tp.broadband.access_loop_encapsulation", FT_NONE, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_l2tp_broadband_access_loop_encapsulation_data_link,
{ "Data Link", "l2tp.broadband.access_loop_encapsulation.data_link", FT_UINT8, BASE_HEX, VALS(ale_datalink_types_vals), 0x0,
NULL, HFILL }},
{ &hf_l2tp_broadband_access_loop_encapsulation_enc1,
{ "Encaps 1", "l2tp.broadband.access_loop_encapsulation.enc1", FT_UINT8, BASE_HEX, VALS(ale_enc1_types_vals), 0x0,
NULL, HFILL }},
{ &hf_l2tp_broadband_access_loop_encapsulation_enc2,
{ "Encaps 2", "l2tp.broadband.access_loop_encapsulation.enc2", FT_UINT8, BASE_HEX, VALS(ale_enc2_types_vals), 0x0,
NULL, HFILL }},
{ &hf_l2tp_broadband_ancp_access_line_type,
{ "ANCP Access Line Type", "l2tp.broadband.ancp_access_line_type", FT_UINT32, BASE_HEX, VALS(ancp_types_vals), 0x0,
NULL, HFILL }},
{ &hf_l2tp_broadband_iwf_session,
{ "IWF Session", "l2tp.broadband.iwf_session", FT_UINT32, BASE_HEX, VALS(iwf_types_vals), 0x0,
NULL, HFILL }},
{ &hf_l2tp_avp_csu,
{ "Connect Speed Update","l2tp.avp.csu", FT_NONE, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_l2tp_avp_csu_res,
{ "Reserved", "l2tp.avp.csu.res", FT_UINT16, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_l2tp_avp_csu_remote_session_id_v2,
{ "Remote Session ID", "l2tp.avp.csu.res", FT_UINT16, BASE_DEC_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_l2tp_avp_csu_current_tx_speed_v2,
{ "Current TX Connect Speed", "l2tp.avp.csu.current_tx_speed", FT_UINT32, BASE_DEC, NULL, 0x0,
"Current TX Connect Speed in bps", HFILL }},
{ &hf_l2tp_avp_csu_current_rx_speed_v2,
{ "Current RX Connect Speed", "l2tp.avp.csu.current_rx_speed", FT_UINT32, BASE_DEC, NULL, 0x0,
"Current RX Connect Speed in bps", HFILL }},
{ &hf_l2tp_avp_csu_remote_session_id_v3,
{ "Remote Session ID", "l2tp.avp.csu.res", FT_UINT32, BASE_DEC_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_l2tp_avp_csu_current_tx_speed_v3,
{ "Current TX Connect Speed", "l2tp.avp.csu.current_tx_speed64", FT_UINT64, BASE_DEC, NULL, 0x0,
"Current TX Connect Speed in bps", HFILL }},
{ &hf_l2tp_avp_csu_current_rx_speed_v3,
{ "Current RX Connect Speed", "l2tp.avp.csu.current_rx_speed64", FT_UINT64, BASE_DEC, NULL, 0x0,
"Current RX Connect Speed in bps", HFILL }},
{ &hf_l2tp_ericsson_msg_type,
{ "Ericsson Message Type", "l2tp.ericsson.msg_type", FT_UINT16, BASE_DEC, VALS(ericsson_msg_type_vals), 0x0,
NULL, HFILL }},
{ &hf_l2tp_ericsson_conn_type,
{ "Connection Type", "l2tp.ericsson.conn_type", FT_UINT8, BASE_DEC, VALS(ericsson_conn_type_vals), 0x0,
NULL, HFILL }},
{ &hf_l2tp_ericsson_stn_name,
{ "STN Name", "l2tp.ericsson.stn_name", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_l2tp_ericsson_crc32_enable,
{ "CRC32 Enabled", "l2tp.ericsson.crc32_enable", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_l2tp_ericsson_abis_lower_mode,
{ "Abis Lower Type", "l2tp.ericsson.abis_lower_mode", FT_UINT8, BASE_DEC, VALS(ericsson_abis_lower_mode_vals), 0x0,
NULL, HFILL }},
{ &hf_l2tp_ericsson_tc_overl_thresh,
{ "Overload Threshold in 0.1%", "l2tp.ericsson.overload_thresh", FT_UINT16, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_l2tp_ericsson_tc_num_groups,
{ "Number of Transport Config Groups", "l2tp.ericsson.tc_num_groups", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_l2tp_ericsson_tcg_group_id,
{ "Transport Config Group ID", "l2tp.ericsson.tc_group_id", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_l2tp_ericsson_tcg_num_sapis,
{ "Number of SAPIs in Transport Group", "l2tp.ericsson.tc_num_sapi", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_l2tp_ericsson_tcg_sapi,
{ "TCG SAPI", "l2tp.ericsson.tcg_sapi", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_l2tp_ericsson_tcg_ip,
{ "TCG IP Address", "l2tp.ericsson.tcg_ip", FT_IPv4, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_l2tp_ericsson_tcg_dscp,
{ "TCG DSCP", "l2tp.ericsson.tcg_dscp", FT_UINT8, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_l2tp_ericsson_tcg_crc32_enable,
{ "CRC32 Enabled", "l2tp.ericsson.crc32_en", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_l2tp_ericsson_tc_num_maps,
{ "Number of TEI-SC Maps", "l2tp.ericsson.num_maps", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_l2tp_ericsson_map_tei_low,
{ "TEI Range Lowest Value", "l2tp.ericsson.map_tei_low", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_l2tp_ericsson_map_tei_high,
{ "TEI Range Highest Value", "l2tp.ericsson.map_tei_high", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_l2tp_ericsson_map_sc,
{ "Super Channel", "l2tp.ericsson.map_ssc", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_l2tp_ericsson_ver_pref,
{ "Preferred/Chosen Version", "l2tp.ericsson.ver_pref", FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_l2tp_ericsson_ver_2,
{ "Version (2)", "l2tp.ericsson.ver_2", FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_l2tp_ericsson_ver_3,
{ "Version (3)", "l2tp.ericsson.ver_3", FT_UINT32, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
/* 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 }},
{ &hf_l2tp_result_code, { "Result code", "l2tp.result_code", FT_UINT16, BASE_DEC|BASE_EXT_STRING, &result_code_cdn_vals_ext, 0x0, NULL, HFILL }},
{ &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 }},
{ &hf_l2tp_lapd_info, { "LAPD info", "l2tp.lapd_info", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_l2tp_session_id, { "Packet Type", "l2tp.session_id", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_l2tp_zero_length_body_message, { "Zero Length Body message", "l2tp.zero_length_body_message", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_l2tp_offset_padding, { "Offset Padding", "l2tp.offset_padding", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL }},
};
static gint *ett[] = {
&ett_l2tp,
&ett_l2tp_ctrl,
&ett_l2tp_avp,
&ett_l2tp_avp_sub,
&ett_l2tp_ale_sub,
&ett_l2tp_l2_spec,
&ett_l2tp_lcp,
&ett_l2tp_csu,
&ett_l2tp_ericsson_tcg,
&ett_l2tp_ericsson_map,
};
static ei_register_info ei[] = {
{ &ei_l2tp_incorrect_digest, { "l2tp.incorrect_digest", PI_CHECKSUM, PI_WARN, "Incorrect Digest", EXPFILL }},
/* Generated from convert_proto_tree_add_text.pl */
{ &ei_l2tp_vendor_specific_avp_data, { "l2tp.vendor_specific_avp_data", PI_UNDECODED, PI_WARN, "Vendor-Specific AVP data", EXPFILL }},
{ &ei_l2tp_avp_length, { "l2tp.avp_length.bad", PI_MALFORMED, PI_ERROR, "Bad AVP length", EXPFILL }},
};
module_t *l2tp_module;
expert_module_t* expert_l2tp;
/* Decode As handling */
static build_valid_func l2tp_da_build_value[1] = {l2tp_value};
static decode_as_value_t l2tp_da_values = {l2tp_prompt, 1, l2tp_da_build_value};
static decode_as_t l2tp_da = {"l2tp", "L2TPv3 payload", "l2tp.pw_type", 1, 0, &l2tp_da_values, NULL, NULL,
decode_as_default_populate_list, decode_as_default_reset, decode_as_default_change, NULL};
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));
expert_l2tp = expert_register_protocol(proto_l2tp);
expert_register_field_array(expert_l2tp, ei, array_length(ei));
l2tp_vendor_avp_dissector_table = register_dissector_table("l2tp.vendor_avp", "L2TP vendor AVP dissector table", proto_l2tp, FT_UINT32, BASE_DEC);
pw_type_table = register_dissector_table("l2tp.pw_type", "L2TPv3 payload type", proto_l2tp, FT_UINT32, BASE_DEC);
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_obsolete_preference(l2tp_module, "protocol");
prefs_register_string_preference(l2tp_module,"shared_secret","Shared Secret",
"Shared secret used for control message digest authentication",
&shared_secret);
register_cleanup_routine(l2tp_cleanup);
register_decode_as(&l2tp_da);
}
void
proto_reg_handoff_l2tp(void)
{
dissector_handle_t atm_oam_llc_handle;
l2tp_udp_handle = 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_add_dependency("ppp_hdlc", proto_l2tp);
ppp_lcp_options_handle = find_dissector_add_dependency("ppp_lcp_options", proto_l2tp);
/* Register vendor AVP dissector(s)*/
dissector_add_uint("l2tp.vendor_avp", VENDOR_CABLELABS, create_dissector_handle(dissect_l2tp_vnd_cablelabs_avps, proto_l2tp));
/*
* Get a handle for the dissectors used in v3.
*/
atm_oam_handle = find_dissector_add_dependency("atm_oam_cell", proto_l2tp);
llc_handle = find_dissector_add_dependency("llc", proto_l2tp);
atm_oam_llc_handle = create_dissector_handle( dissect_atm_oam_llc, proto_l2tp );
dissector_add_uint("l2tp.pw_type", L2TPv3_PROTOCOL_AAL5, atm_oam_llc_handle);
}
/*
* 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:
*/