forked from osmocom/wireshark
4013 lines
153 KiB
C
4013 lines
153 KiB
C
/* packet-q931.c
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* Routines for Q.931 frame disassembly
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* Guy Harris <guy@alum.mit.edu>
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*
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* Modified by Andreas Sikkema for possible use with H.323
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/tap.h>
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#include <epan/nlpid.h>
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#include "packet-q931.h"
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#include "packet-e164.h"
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#include <epan/prefs.h>
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#include <epan/expert.h>
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#include <epan/reassemble.h>
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#include <epan/sctpppids.h>
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#include <epan/lapd_sapi.h>
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#include "packet-tpkt.h"
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/* Q.931 references:
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*
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* http://www.acacia-net.com/Clarinet/Protocol/q9313svn.htm
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* http://www.acacia-net.com/Clarinet/Protocol/q9311sc3.htm
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* http://www.acacia-net.com/Clarinet/Protocol/q9317oz7.htm
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* http://web.archive.org/web/20150510102424/http://www.protocols.com/pbook/isdn.htm
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* http://freesoft.org/CIE/Topics/126.htm
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* http://noc.comstar.ru/miscdocs/ascend-faq-cause-codes.html
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* http://www.andrews-arnold.co.uk/isdn/q931cause.html
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* http://www.tulatelecom.ru/staff/german/DSSHelp/MessList/InfEl/InfElList.html
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*/
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void proto_register_q931(void);
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void proto_reg_handoff_q931(void);
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static void reset_q931_packet_info(q931_packet_info *pi);
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static int q931_tap = -1;
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static dissector_handle_t q931_handle;
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static dissector_handle_t q931_over_ip_handle;
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static int proto_q931 = -1;
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static int hf_q931_discriminator = -1;
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static int hf_q931_coding_standard = -1;
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static int hf_q931_interpretation = -1;
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static int hf_q931_pres_meth_prot_prof = -1;
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static int hf_q931_high_layer_characteristics = -1;
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static int hf_q931_extended_high_layer_characteristics = -1;
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static int hf_q931_extended_audiovisual_characteristics = -1;
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static int hf_q931_information_transfer_capability = -1;
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static int hf_q931_transfer_mode = -1;
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static int hf_q931_information_transfer_rate = -1;
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static int hf_q931_layer_ident = -1;
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static int hf_q931_uil1 = -1;
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static int hf_q931_call_ref_len = -1;
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static int hf_q931_call_ref_flag = -1;
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static int hf_q931_call_ref = -1;
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static int hf_q931_message_type = -1;
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static int hf_q931_maintenance_message_type = -1;
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static int hf_q931_segment_type = -1;
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static int hf_q931_cause_location = -1;
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static int hf_q931_cause_value = -1;
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static int hf_q931_number_type = -1;
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static int hf_q931_numbering_plan = -1;
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static int hf_q931_extension_ind = -1;
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static int hf_q931_extension_ind_preference = -1;
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static int hf_q931_extension_ind_new_status = -1;
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static int hf_q931_calling_party_number = -1;
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static int hf_q931_called_party_number = -1;
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static int hf_q931_connected_number = -1;
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static int hf_q931_redirecting_number = -1;
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static int hf_q931_screening_ind = -1;
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static int hf_q931_presentation_ind = -1;
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/* fields for Channel Indentification IE */
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static int hf_q931_channel_interface_explicit = -1;
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static int hf_q931_channel_interface_type = -1;
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static int hf_q931_channel_exclusive = -1;
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static int hf_q931_channel_dchan = -1;
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static int hf_q931_channel_selection_bri = -1;
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static int hf_q931_channel_selection_pri = -1;
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static int hf_q931_channel_map = -1;
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static int hf_q931_channel_element_type = -1;
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static int hf_q931_channel_number = -1;
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static int hf_q931_segments = -1;
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static int hf_q931_segment = -1;
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static int hf_q931_segment_overlap = -1;
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static int hf_q931_segment_overlap_conflict = -1;
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static int hf_q931_segment_multiple_tails = -1;
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static int hf_q931_segment_too_long_segment = -1;
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static int hf_q931_segment_error = -1;
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static int hf_q931_segment_count = -1;
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static int hf_q931_reassembled_in = -1;
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static int hf_q931_reassembled_length = -1;
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/* Generated from convert_proto_tree_add_text.pl */
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static int hf_q931_user_information_bytes = -1;
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static int hf_q931_restart_indicator = -1;
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static int hf_q931_call_state_data = -1;
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static int hf_q931_first_segment = -1;
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static int hf_q931_packet_size_backward_value = -1;
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static int hf_q931_packet_size_forward_value = -1;
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static int hf_q931_information_rate_minimum_outgoing = -1;
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static int hf_q931_bearer_capability_data = -1;
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static int hf_q931_uil2_info = -1;
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static int hf_q931_netid_facility_specification = -1;
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static int hf_q931_bearer_capability_stop_bits = -1;
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static int hf_q931_netid_length = -1;
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static int hf_q931_channel_data = -1;
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static int hf_q931_call_state = -1;
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static int hf_q931_party_subaddr_type = -1;
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static int hf_q931_uil3 = -1;
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static int hf_q931_user_information_str = -1;
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static int hf_q931_bearer_capability_user_rate = -1;
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static int hf_q931_channel_slot_map = -1;
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static int hf_q931_bearer_capability_modem_type = -1;
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static int hf_q931_cause_data = -1;
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static int hf_q931_cause_recommendation = -1;
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static int hf_q931_bearer_capability_parity = -1;
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static int hf_q931_cause_call_rejection_reason = -1;
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static int hf_q931_party_category = -1;
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static int hf_q931_progress_indicator_location = -1;
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static int hf_q931_bearer_capability_packet_window_size = -1;
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static int hf_q931_extension_reason = -1;
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static int hf_q931_information_rate_minimum_incoming = -1;
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static int hf_q931_user_protocol_discriminator = -1;
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static int hf_q931_uil2 = -1;
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static int hf_q931_progress_indicator_description = -1;
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static int hf_q931_bearer_capability_mode = -1;
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static int hf_q931_not_first_segment = -1;
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static int hf_q931_fast_select = -1;
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static int hf_q931_netid_plan = -1;
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static int hf_q931_cause_call_message_type = -1;
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static int hf_q931_reverse_charging_ind = -1;
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static int hf_q931_high_layer_compat_data = -1;
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static int hf_q931_progress_indicator_data = -1;
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static int hf_q931_pl_window_size_forward_value = -1;
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static int hf_q931_cause_call_rec_timer = -1;
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static int hf_q931_bearer_capability_window_size = -1;
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static int hf_q931_cause_call_user_specific_diagnostic = -1;
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static int hf_q931_channel_interface_id = -1;
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static int hf_q931_uil3_additional = -1;
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static int hf_q931_party_subaddr = -1;
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static int hf_q931_bearer_capability_rate_multiplier = -1;
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static int hf_q931_bearer_capability_data_bits = -1;
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static int hf_q931_cug_index_code = -1;
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static int hf_q931_bearer_capability_default_packet_size = -1;
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static int hf_q931_notification_description = -1;
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static int hf_q931_information_rate_outgoing = -1;
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static int hf_q931_user_information_len = -1;
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static int hf_q931_pl_window_size_backward_value = -1;
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static int hf_q931_repeat_indicator = -1;
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static int hf_q931_cause_call_diagnostic = -1;
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static int hf_q931_netid = -1;
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static int hf_q931_cause_call_condition = -1;
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static int hf_q931_signal = -1;
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static int hf_q931_congestion_level = -1;
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static int hf_q931_bearer_capability_intermediate_rate = -1;
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static int hf_q931_netid_type = -1;
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static int hf_q931_information_rate_incoming = -1;
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static int hf_q931_party_subaddr_odd_even_indicator = -1;
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static int hf_q931_cug_indication = -1;
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static int hf_q931_multiple_frame_establishment = -1;
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static int hf_q931_message_originator = -1;
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static int hf_q931_out_band_negotiation = -1;
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static int hf_q931_negotiation_is_done = -1;
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static int hf_q931_layer_1 = -1;
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static int hf_q931_accept_data_flow_control = -1;
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static int hf_q931_mode_of_operation = -1;
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static int hf_q931_extension_condition_type = -1;
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static int hf_q931_pl_binary_confirmation = -1;
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static int hf_q931_pl_request = -1;
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static int hf_q931_pl_modulus = -1;
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static int hf_q931_network_service = -1;
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static int hf_q931_extension_condition = -1;
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static int hf_q931_rate_adaption_header = -1;
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static int hf_q931_send_data_net_independent_clock = -1;
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static int hf_q931_bearer_capability_duplex = -1;
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static int hf_q931_accept_data_net_independent_clock = -1;
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static int hf_q931_send_data_flow_control = -1;
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static int hf_q931_data = -1;
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static int hf_q931_layer_1_in_band_negotiation = -1;
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static int hf_q931_information_element = -1;
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static int hf_q931_information_element_len = -1;
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static int hf_q931_date_time = -1;
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static int hf_q931_more_data = -1;
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static int hf_q931_sending_complete = -1;
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static int hf_q931_message_segment = -1;
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static int hf_q931_missing_info_element = -1;
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static int hf_q931_insufficient_info_element = -1;
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static int hf_q931_cumulative_transit_delay = -1;
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static int hf_q931_requested_end_to_end_transit_delay = -1;
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static int hf_q931_maximum_end_to_end_transit_delay = -1;
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static int hf_q931_transit_delay = -1;
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static int hf_q931_display_information = -1;
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static int hf_q931_keypad_facility = -1;
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static int hf_q931_avaya_display = -1;
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static int hf_q931_locking_codeset = -1;
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static int hf_q931_protocol_negotiation = -1;
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static gint ett_q931 = -1;
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#define NUM_IE 256
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static gint ett_q931_ie[NUM_IE];
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static gint ett_q931_segments = -1;
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static gint ett_q931_segment = -1;
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static expert_field ei_q931_invalid_length = EI_INIT;
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static expert_field ei_q931_date_time = EI_INIT;
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static expert_field ei_q931_information_element = EI_INIT;
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static expert_field ei_q931_incomplete_ie = EI_INIT;
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static const fragment_items q931_frag_items = {
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&ett_q931_segment,
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&ett_q931_segments,
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&hf_q931_segments,
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&hf_q931_segment,
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&hf_q931_segment_overlap,
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&hf_q931_segment_overlap_conflict,
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&hf_q931_segment_multiple_tails,
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&hf_q931_segment_too_long_segment,
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&hf_q931_segment_error,
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&hf_q931_segment_count,
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&hf_q931_reassembled_in,
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&hf_q931_reassembled_length,
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/* Reassembled data field */
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NULL,
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"segments"
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};
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/* Table for reassembly of fragments. */
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static reassembly_table q931_reassembly_table;
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/* Preferences */
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static gboolean q931_reassembly = TRUE;
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static gboolean g931_iso_iec_cause = FALSE;
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static dissector_table_t codeset_dissector_table;
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static dissector_table_t ie_dissector_table;
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/* desegmentation of Q.931 over TPKT over TCP */
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static gboolean q931_desegment = TRUE;
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/* Subdissectors */
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static dissector_handle_t h225_handle;
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static dissector_handle_t q931_tpkt_handle;
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static dissector_handle_t q931_tpkt_pdu_handle;
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static heur_dissector_list_t q931_user_heur_subdissector_list;
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static void
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dissect_q931_IEs(tvbuff_t *tvb, packet_info *pinfo, proto_tree *root_tree,
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proto_tree *q931_tree, gboolean is_over_ip, int offset, int initial_codeset,
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q931_packet_info *q931_pi);
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const value_string q931_message_type_vals[] = {
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/* 0 */ { Q931_ESCAPE, "ESCAPE" },
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/* 1 */ { Q931_ALERTING, "ALERTING" },
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/* 2 */ { Q931_CALL_PROCEEDING, "CALL PROCEEDING" },
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/* 3 */ { Q931_PROGRESS, "PROGRESS" },
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/* 5 */ { Q931_SETUP, "SETUP" },
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/* 6 */ { Q931_GROUIP_SERVICE, "GROUP SERVICE" },
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/* 7 */ { Q931_CONNECT, "CONNECT" },
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/* 8 */ { Q931_RESYNC_REQ, "RESYNC REQ" },
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/* 9 */ { Q931_RESYNC_RESP, "RESYNC RESP" },
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/* 10 */ { Q931_VERSION, "VERSION" },
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/* 11 */ { Q931_GROUIP_SERVICE_ACK, "GROUP SERVICE ACK" },
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/* 13 */ { Q931_SETUP_ACK, "SETUP ACKNOWLEDGE" },
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/* 15 */ { Q931_CONNECT_ACK, "CONNECT ACKNOWLEDGE" },
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/* 32 */ { Q931_USER_INFORMATION, "USER INFORMATION" },
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/* 33 */ { Q931_SUSPEND_REJECT, "SUSPEND REJECT" },
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/* 34 */ { Q931_RESUME_REJECT, "RESUME REJECT" },
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/* 36 */ { Q931_HOLD, "HOLD" },
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/* 37 */ { Q931_SUSPEND, "SUSPEND" },
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/* 38 */ { Q931_RESUME, "RESUME" },
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/* 40 */ { Q931_HOLD_ACK, "HOLD_ACKNOWLEDGE" },
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/* 45 */ { Q931_SUSPEND_ACK, "SUSPEND ACKNOWLEDGE" },
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/* 46 */ { Q931_RESUME_ACK, "RESUME ACKNOWLEDGE" },
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/* 48 */ { Q931_HOLD_REJECT, "HOLD_REJECT" },
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/* 49 */ { Q931_RETRIEVE, "RETRIEVE" },
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/* 51 */ { Q931_RETRIEVE_ACK, "RETRIEVE ACKNOWLEDGE" },
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/* 55 */ { Q931_RETRIEVE_REJECT, "RETRIEVE REJECT" },
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/* 64 */ { Q931_DETACH, "DETACH" },
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/* 69 */ { Q931_DISCONNECT, "DISCONNECT" },
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/* 70 */ { Q931_RESTART, "RESTART" },
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/* 72 */ { Q931_DETACH_ACKNOWLEDGE, "DETACH ACKNOWLEDGE" },
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/* 77 */ { Q931_RELEASE, "RELEASE" },
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/* 78 */ { Q931_RESTART_ACK, "RESTART ACKNOWLEDGE" },
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/* 90 */ { Q931_RELEASE_COMPLETE, "RELEASE COMPLETE" },
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/* 96 */ { Q931_SEGMENT, "SEGMENT" },
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/* 98 */ { Q931_FACILITY, "FACILITY" },
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/*100 */ { Q931_REGISTER, "REGISTER" },
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/*106 */ { Q931_FACILITY_ACKNOWLEDGE, "FACILITY ACKNOWLEDGE" },
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/*110 */ { Q931_NOTIFY, "NOTIFY" },
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/*114 */ { Q931_FACILITY_REJECT, "FACILITY REJECT" },
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/*117 */ { Q931_STATUS_ENQUIRY, "STATUS ENQUIRY" },
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/*121 */ { Q931_CONGESTION_CONTROL, "CONGESTION CONTROL" },
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/*123 */ { Q931_INFORMATION, "INFORMATION" },
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/*125 */ { Q931_STATUS, "STATUS" },
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{ 0, NULL }
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};
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static value_string_ext q931_message_type_vals_ext = VALUE_STRING_EXT_INIT(q931_message_type_vals);
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static const value_string dms_message_type_vals[] = {
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{ DMS_SERVICE_ACKNOWLEDGE, "SERVICE ACKNOWLEDGE" },
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{ DMS_SERVICE, "SERVICE" },
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{ 0, NULL }
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};
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/*
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* NOTE For call reference flag (octet 2)
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* Bit8
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* 0 The message is sent from the side that originates the call reference
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* 1 The message is sent to the side that originates the call reference
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*/
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static const true_false_string tfs_call_ref_flag = {
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"Message sent to originating side",
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"Message sent from originating side"
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};
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static const true_false_string tfs_interface_type = {
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"Primary rate interface",
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"Basic rate interface"
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};
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static const true_false_string tfs_channel_exclusive = {
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"Exclusive; only the indicated channel is acceptable",
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"Indicated channel is preferred"
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};
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static const true_false_string tfs_channel_map = {
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"Channel indicated by slot map",
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"Channel indicated by number"
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};
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/*
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* Information elements.
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*/
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/* Shifted codeset values */
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#define CS0 0x000
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#define CS1 0x100
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#define CS2 0x200
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#define CS3 0x300
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#define CS4 0x400
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#define CS5 0x500
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#define CS6 0x600
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#define CS7 0x700
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#define Q931_IE_SO_MASK 0x80 /* single-octet/variable-length mask */
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/*
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* Single-octet IEs.
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*/
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#define Q931_IE_SO_IDENTIFIER_MASK 0xf0 /* IE identifier mask */
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#define Q931_IE_SO_IDENTIFIER_SHIFT 4 /* IE identifier shift */
|
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#define Q931_IE_SO_IE_MASK 0x0F /* IE mask */
|
|
|
|
#define Q931_IE_SHIFT 0x90
|
|
#define Q931_IE_SHIFT_NON_LOCKING 0x08 /* non-locking shift */
|
|
#define Q931_IE_SHIFT_CODESET 0x07 /* codeset */
|
|
|
|
#define Q931_IE_MORE_DATA_OR_SEND_COMP 0xA0 /* More Data or Sending Complete */
|
|
#define Q931_IE_MORE_DATA 0xA0
|
|
#define Q931_IE_SENDING_COMPLETE 0xA1
|
|
|
|
#define Q931_IE_CONGESTION_LEVEL 0xB0
|
|
#define Q931_IE_REPEAT_INDICATOR 0xD0
|
|
|
|
/*
|
|
* Variable-length IEs.
|
|
*/
|
|
#define Q931_IE_VL_EXTENSION 0x80 /* Extension flag */
|
|
/* extension bit. The bit value "0" indicates that the octet continues through the */
|
|
/* next octet. The bit value "1" indicates that this octet is the last octet */
|
|
|
|
static const true_false_string q931_extension_ind_value = {
|
|
"last octet",
|
|
"information continues through the next octet"
|
|
};
|
|
|
|
|
|
/*
|
|
* Codeset 0 (default).
|
|
*/
|
|
#define Q931_IE_SEGMENTED_MESSAGE 0x00
|
|
#define Q931_IE_CHANGE_STATUS 0x01
|
|
#define Q931_IE_BEARER_CAPABILITY 0x04
|
|
#define Q931_IE_CAUSE 0x08
|
|
#define Q931_IE_CALL_IDENTITY 0x10
|
|
#define Q931_IE_CALL_STATE 0x14
|
|
#define Q931_IE_CHANNEL_IDENTIFICATION 0x18
|
|
#define Q931_IE_FACILITY 0x1C
|
|
#define Q931_IE_PROGRESS_INDICATOR 0x1E
|
|
#define Q931_IE_NETWORK_SPECIFIC_FACIL 0x20 /* Network Specific Facilities */
|
|
#define Q931_IE_NOTIFICATION_INDICATOR 0x27
|
|
#define Q931_IE_DISPLAY 0x28
|
|
#define Q931_IE_DATE_TIME 0x29
|
|
#define Q931_IE_KEYPAD_FACILITY 0x2C
|
|
#define Q931_IE_INFORMATION_REQUEST 0x32
|
|
#define Q931_IE_SIGNAL 0x34
|
|
#define Q931_IE_SWITCHHOOK 0x36
|
|
#define Q931_IE_FEATURE_ACTIVATION 0x38
|
|
#define Q931_IE_FEATURE_INDICATION 0x39
|
|
#define Q931_IE_ENDPOINT_IDENTIFIER 0x3B
|
|
#define Q931_IE_SERVICE_PROFILE_ID 0x3A
|
|
#define Q931_IE_INFORMATION_RATE 0x40
|
|
#define Q931_IE_E2E_TRANSIT_DELAY 0x42 /* End-to-end Transit Delay */
|
|
#define Q931_IE_TD_SELECTION_AND_INT 0x43 /* Transit Delay Selection and Indication */
|
|
#define Q931_IE_PL_BINARY_PARAMETERS 0x44 /* Packet layer binary parameters */
|
|
#define Q931_IE_PL_WINDOW_SIZE 0x45 /* Packet layer window size */
|
|
#define Q931_IE_PACKET_SIZE 0x46 /* Packet size */
|
|
#define Q931_IE_CUG 0x47 /* Closed user group */
|
|
#define Q931_IE_REVERSE_CHARGE_IND 0x4A /* Reverse charging indication */
|
|
#define Q931_IE_CONNECTED_NUMBER_DEFAULT 0x4C /* Connected Number */
|
|
#define Q931_IE_INTERFACE_SERVICE 0x66 /* q931+ Interface Service */
|
|
#define Q931_IE_CHANNEL_STATUS 0x67 /* q931+ Channel Status */
|
|
#define Q931_IE_VERSION_INFO 0x68 /* q931+ Version Info */
|
|
#define Q931_IE_CALLING_PARTY_NUMBER 0x6C /* Calling Party Number */
|
|
#define Q931_IE_CALLING_PARTY_SUBADDR 0x6D /* Calling Party Subaddress */
|
|
#define Q931_IE_CALLED_PARTY_NUMBER 0x70 /* Called Party Number */
|
|
#define Q931_IE_CALLED_PARTY_SUBADDR 0x71 /* Called Party Subaddress */
|
|
#define Q931_IE_REDIRECTING_NUMBER 0x74
|
|
#define Q931_IE_REDIRECTION_NUMBER 0x76
|
|
#define Q931_IE_TRANSIT_NETWORK_SEL 0x78 /* Transit Network Selection */
|
|
#define Q931_IE_RESTART_INDICATOR 0x79
|
|
#define Q931_IE_LOW_LAYER_COMPAT 0x7C /* Low-Layer Compatibility */
|
|
#define Q931_IE_HIGH_LAYER_COMPAT 0x7D /* High-Layer Compatibility */
|
|
#define Q931_IE_USER_USER 0x7E /* User-User */
|
|
#define Q931_IE_ESCAPE 0x7F /* Escape for extension */
|
|
|
|
/*
|
|
* Codeset 0 ETSI.
|
|
*/
|
|
#define Q931_IE_CONNECTED_NUMBER 0x8C
|
|
#define Q931_IE_CONNECTED_SUBADDR 0x8D
|
|
|
|
/*
|
|
* Codeset 5 (National-specific) Belgium.
|
|
*/
|
|
#define Q931_IE_CHARGING_ADVICE 0x1A
|
|
|
|
/*
|
|
* Codeset 5 (National-specific) Bellcore National ISDN.
|
|
*/
|
|
#define Q931_IE_OPERATOR_SYSTEM_ACCESS 0x1D
|
|
|
|
/*
|
|
* Codeset 5 ETSI ETS 300 192
|
|
*/
|
|
#define Q931_IE_PARTY_CATEGORY 0x32
|
|
|
|
/*
|
|
* Codeset 6 (Network-specific) Belgium.
|
|
*/
|
|
/* 0x1A is Charging Advice, as with Codeset 5 */
|
|
#define Q931_IE_REDIRECTING_NUMBER 0x74
|
|
|
|
/*
|
|
* Codeset 6 (Network-specific) FT-Numeris.
|
|
*/
|
|
/* 0x1D is User Capability */
|
|
|
|
/*
|
|
* Codeset 6 (Network-specific) Bellcore National ISDN.
|
|
*/
|
|
#define Q931_IE_REDIRECTING_SUBADDR 0x75 /* Redirecting Subaddress */
|
|
/* 0x76 is Redirection Number, but that's also Codeset 0 */
|
|
#define Q931_IE_CALL_APPEARANCE 0x7B
|
|
|
|
/* Codeset 0 */
|
|
static const value_string q931_info_element_vals0[] = {
|
|
{ Q931_IE_SEGMENTED_MESSAGE, "Segmented message" },
|
|
{ Q931_IE_CHANGE_STATUS, "Change status" },
|
|
{ Q931_IE_BEARER_CAPABILITY, "Bearer capability" },
|
|
{ Q931_IE_CAUSE, "Cause" },
|
|
{ Q931_IE_CALL_IDENTITY, "Call identity" },
|
|
{ Q931_IE_CALL_STATE, "Call state" },
|
|
{ Q931_IE_CHANNEL_IDENTIFICATION, "Channel identification" },
|
|
{ Q931_IE_FACILITY, "Facility" },
|
|
{ Q931_IE_PROGRESS_INDICATOR, "Progress indicator" },
|
|
{ Q931_IE_NETWORK_SPECIFIC_FACIL, "Network specific facilities" },
|
|
{ Q931_IE_NOTIFICATION_INDICATOR, "Notification indicator" },
|
|
{ Q931_IE_DISPLAY, "Display" },
|
|
{ Q931_IE_DATE_TIME, "Date/Time" },
|
|
{ Q931_IE_KEYPAD_FACILITY, "Keypad facility" },
|
|
{ Q931_IE_INFORMATION_REQUEST, "Information request" },
|
|
{ Q931_IE_SIGNAL, "Signal" },
|
|
{ Q931_IE_SWITCHHOOK, "Switchhook" },
|
|
{ Q931_IE_FEATURE_ACTIVATION, "Feature activation" },
|
|
{ Q931_IE_FEATURE_INDICATION, "Feature Indication" },
|
|
{ Q931_IE_ENDPOINT_IDENTIFIER, "Endpoint identifier" },
|
|
{ Q931_IE_SERVICE_PROFILE_ID, "Service profile ID" },
|
|
{ Q931_IE_INFORMATION_RATE, "Information rate" },
|
|
{ Q931_IE_E2E_TRANSIT_DELAY, "End-to-end transit delay" },
|
|
{ Q931_IE_TD_SELECTION_AND_INT, "Transit delay selection and indication" },
|
|
{ Q931_IE_PL_BINARY_PARAMETERS, "Packet layer binary parameters" },
|
|
{ Q931_IE_PL_WINDOW_SIZE, "Packet layer window size" },
|
|
{ Q931_IE_PACKET_SIZE, "Packet size" },
|
|
{ Q931_IE_CUG, "Closed user group" },
|
|
{ Q931_IE_REVERSE_CHARGE_IND, "Reverse charging indication" },
|
|
{ Q931_IE_CONNECTED_NUMBER_DEFAULT, "Connected number" },
|
|
{ Q931_IE_INTERFACE_SERVICE, "Interface Service" },
|
|
{ Q931_IE_CHANNEL_STATUS, "Channel Status" },
|
|
{ Q931_IE_VERSION_INFO, "Version Info" },
|
|
{ Q931_IE_CALLING_PARTY_NUMBER, "Calling party number" },
|
|
{ Q931_IE_CALLING_PARTY_SUBADDR, "Calling party subaddress" },
|
|
{ Q931_IE_CALLED_PARTY_NUMBER, "Called party number" },
|
|
{ Q931_IE_CALLED_PARTY_SUBADDR, "Called party subaddress" },
|
|
{ Q931_IE_REDIRECTING_NUMBER, "Redirecting number" },
|
|
{ Q931_IE_REDIRECTION_NUMBER, "Redirection number" },
|
|
{ Q931_IE_TRANSIT_NETWORK_SEL, "Transit network selection" },
|
|
{ Q931_IE_RESTART_INDICATOR, "Restart indicator" },
|
|
{ Q931_IE_LOW_LAYER_COMPAT, "Low-layer compatibility" },
|
|
{ Q931_IE_HIGH_LAYER_COMPAT, "High-layer compatibility" },
|
|
{ Q931_IE_USER_USER, "User-user" },
|
|
{ Q931_IE_ESCAPE, "Escape" },
|
|
{ Q931_IE_CONNECTED_NUMBER, "Connected number" },
|
|
{ Q931_IE_CONNECTED_SUBADDR, "Connected subaddress" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/* Codeset 1 */
|
|
static const value_string q931_info_element_vals1[] = {
|
|
{ 0, NULL }
|
|
};
|
|
/* Codeset 2 */
|
|
static const value_string q931_info_element_vals2[] = {
|
|
{ 0, NULL }
|
|
};
|
|
/* Codeset 3 */
|
|
static const value_string q931_info_element_vals3[] = {
|
|
{ 0, NULL }
|
|
};
|
|
/* Codeset 4 */
|
|
static const value_string q931_info_element_vals4[] = {
|
|
{ 0, NULL }
|
|
};
|
|
/* Codeset 5 */
|
|
static const value_string q931_info_element_vals5[] = {
|
|
{ Q931_IE_CHARGING_ADVICE, "Charging advice" },
|
|
{ Q931_IE_OPERATOR_SYSTEM_ACCESS, "Operator system access" },
|
|
{ Q931_IE_PARTY_CATEGORY, "Party category"},
|
|
{ 0, NULL }
|
|
};
|
|
/* Codeset 6 */
|
|
static const value_string q931_info_element_vals6[] = {
|
|
{ Q931_IE_REDIRECTING_NUMBER, "Redirecting number" },
|
|
{ Q931_IE_REDIRECTING_SUBADDR, "Redirecting subaddress" },
|
|
{ Q931_IE_CALL_APPEARANCE, "Call appearance" },
|
|
{ Q931_IE_DISPLAY, "Avaya Display" }, /* if Avaya codeset to send display = 6 */
|
|
{ 0, NULL }
|
|
};
|
|
/* Codeset 7 */
|
|
static const value_string q931_info_element_vals7[] = {
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/* Codeset array */
|
|
#define NUM_INFO_ELEMENT_VALS (Q931_IE_SHIFT_CODESET+1)
|
|
static const value_string *q931_info_element_vals[NUM_INFO_ELEMENT_VALS] = {
|
|
q931_info_element_vals0,
|
|
q931_info_element_vals1,
|
|
q931_info_element_vals2,
|
|
q931_info_element_vals3,
|
|
q931_info_element_vals4,
|
|
q931_info_element_vals5,
|
|
q931_info_element_vals6,
|
|
q931_info_element_vals7,
|
|
};
|
|
|
|
static const value_string q931_congestion_level_vals[] = {
|
|
{ 0x0, "Receiver ready" },
|
|
{ 0xF, "Receiver not ready" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string q931_repeat_indication_vals[] = {
|
|
{ 0x2, "Prioritized list" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/*
|
|
* ITU-standardized coding.
|
|
*/
|
|
#define Q931_ITU_STANDARDIZED_CODING 0x00
|
|
#define Q931_ISO_IEC_STANDARDIZED_CODING 0x20
|
|
|
|
/*
|
|
* Dissect a Segmented message information element.
|
|
*/
|
|
static void
|
|
dissect_q931_segmented_message_ie(tvbuff_t *tvb, packet_info *pinfo, int offset, int len,
|
|
proto_tree *tree, proto_item* item)
|
|
{
|
|
guint8 octet;
|
|
|
|
if (len != 2) {
|
|
expert_add_info_format(pinfo, item, &ei_q931_invalid_length,
|
|
"Segmented message: length is %d, should be 2", len);
|
|
return;
|
|
}
|
|
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
if (octet & 0x80) {
|
|
proto_tree_add_item(tree, hf_q931_first_segment, tvb, offset, 1, ENC_NA);
|
|
} else {
|
|
proto_tree_add_item(tree, hf_q931_not_first_segment, tvb, offset, 1, ENC_NA);
|
|
}
|
|
proto_tree_add_item(tree, hf_q931_segment_type, tvb, offset + 1, 1, ENC_BIG_ENDIAN);
|
|
}
|
|
|
|
/*
|
|
* Dissect a Bearer capability or Low-layer compatibility information element.
|
|
*/
|
|
static const value_string q931_coding_standard_vals[] = {
|
|
{ 0x0, "ITU-T standardized coding" },
|
|
{ 0x1, "ISO/IEC standard" },
|
|
{ 0x2, "National standard" },
|
|
{ 0x3, "Standard defined for this particular network" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string q931_information_transfer_capability_vals[] = {
|
|
{ 0x00, "Speech" },
|
|
{ 0x08, "Unrestricted digital information" },
|
|
{ 0x09, "Restricted digital information" },
|
|
{ 0x10, "3.1 kHz audio" },
|
|
{ 0x11, "Unrestricted digital information with tones/announcements" },
|
|
{ 0x18, "Video" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string q931_transfer_mode_vals[] = {
|
|
{ 0x00, "Circuit mode" },
|
|
{ 0x02, "Packet mode" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
#define Q931_IT_RATE_MULTIRATE 0x18
|
|
|
|
static const value_string q931_information_transfer_rate_vals[] = {
|
|
{ 0x00, "Packet mode" },
|
|
{ 0x10, "64 kbit/s" },
|
|
{ 0x11, "2 x 64 kbit/s" },
|
|
{ 0x13, "384 kbit/s" },
|
|
{ 0x15, "1536 kbit/s" },
|
|
{ 0x17, "1920 kbit/s" },
|
|
{ Q931_IT_RATE_MULTIRATE, "Multirate (64 kbit/s base rate)" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/*
|
|
* Values 0x0a and 0x0b added from Q.931 Amendment 1 (12/2002)
|
|
*/
|
|
static const value_string q931_uil1_vals[] = {
|
|
{ 0x01, "V.110/I.460/X.30 rate adaption" },
|
|
{ 0x02, "Recommendation G.711 u-law" },
|
|
{ 0x03, "Recommendation G.711 A-law" },
|
|
{ 0x04, "Recommendation G.721 32 kbit/s ADPCM and Recommendation I.460" },
|
|
{ 0x05, "Recommendation H.221 and H.242" },
|
|
{ 0x06, "Recommendation H.223 and H.245" },
|
|
{ 0x07, "Non-ITU-T-standardized rate adaption" },
|
|
{ 0x08, "V.120 rate adaption" },
|
|
{ 0x09, "X.31 HDLC flag stuffing" },
|
|
{ 0x0a, "Recommendation G.728 LD-CELP" },
|
|
{ 0x0b, "Recommendation G.729 CS-ACELP" },
|
|
{ 0, NULL }
|
|
};
|
|
static value_string_ext q931_uil1_vals_ext = VALUE_STRING_EXT_INIT(q931_uil1_vals);
|
|
|
|
static const value_string q931_l1_user_rate_vals[] = {
|
|
{ 0x00, "Rate indicated by E-bits" },
|
|
{ 0x01, "0.6 kbit/s" },
|
|
{ 0x02, "1.2 kbit/s" },
|
|
{ 0x03, "2.4 kbit/s" },
|
|
{ 0x04, "3.6 kbit/s" },
|
|
{ 0x05, "4.8 kbit/s" },
|
|
{ 0x06, "7.2 kbit/s" },
|
|
{ 0x07, "8 kbit/s" },
|
|
{ 0x08, "9.6 kbit/s" },
|
|
{ 0x09, "14.4 kbit/s" },
|
|
{ 0x0A, "16 kbit/s" },
|
|
{ 0x0B, "19.2 kbit/s" },
|
|
{ 0x0C, "32 kbit/s" },
|
|
{ 0x0E, "48 kbit/s" },
|
|
{ 0x0F, "56 kbit/s" },
|
|
{ 0x10, "64 kbit/s "},
|
|
{ 0x15, "0.1345 kbit/s" },
|
|
{ 0x16, "0.100 kbit/s" },
|
|
{ 0x17, "0.075/1.2 kbit/s" },
|
|
{ 0x18, "1.2/0.075 kbit/s" },
|
|
{ 0x19, "0.050 kbit/s" },
|
|
{ 0x1A, "0.075 kbit/s" },
|
|
{ 0x1B, "0.110 kbit/s" },
|
|
{ 0x1C, "0.150 kbit/s" },
|
|
{ 0x1D, "0.200 kbit/s" },
|
|
{ 0x1E, "0.300 kbit/s" },
|
|
{ 0x1F, "12 kbit/s" },
|
|
{ 0, NULL }
|
|
};
|
|
static value_string_ext q931_l1_user_rate_vals_ext = VALUE_STRING_EXT_INIT(q931_l1_user_rate_vals);
|
|
|
|
static const value_string q931_l1_intermediate_rate_vals[] = {
|
|
{ 0x20, "8 kbit/s" },
|
|
{ 0x40, "16 kbit/s" },
|
|
{ 0x60, "32 kbit/s" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string q931_l1_stop_bits_vals[] = {
|
|
{ 0x20, "1" },
|
|
{ 0x40, "1.5" },
|
|
{ 0x60, "2" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string q931_l1_data_bits_vals[] = {
|
|
{ 0x08, "5" },
|
|
{ 0x10, "7" },
|
|
{ 0x18, "8" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string q931_l1_parity_vals[] = {
|
|
{ 0x00, "Odd" },
|
|
{ 0x02, "Even" },
|
|
{ 0x03, "None" },
|
|
{ 0x04, "Forced to 0" },
|
|
{ 0x05, "Forced to 1" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
#define Q931_UIL2_USER_SPEC 0x10
|
|
|
|
static const value_string q931_uil2_vals[] = {
|
|
{ 0x01, "Basic mode ISO 1745" },
|
|
{ 0x02, "Q.921/I.441" }, /* LAPD */
|
|
{ 0x06, "X.25, link layer" }, /* LAPB */
|
|
{ 0x07, "X.25 multilink" }, /* or 0x0F? */
|
|
{ 0x08, "T.71 Extended LAPB" },
|
|
{ 0x09, "HDLC ARM" },
|
|
{ 0x0A, "HDLC NRM" },
|
|
{ 0x0B, "HDLC ABM" },
|
|
{ 0x0C, "ISO 8802/2 LLC" },
|
|
{ 0x0D, "X.75 Single Link Procedure" },
|
|
{ 0x0E, "Q.922" },
|
|
{ 0x0F, "Core aspects of Q.922" },
|
|
{ Q931_UIL2_USER_SPEC, "User-specified" },
|
|
{ 0x11, "ISO 7776 DTE-DTE operation" },
|
|
{ 0, NULL }
|
|
};
|
|
static value_string_ext q931_uil2_vals_ext = VALUE_STRING_EXT_INIT(q931_uil2_vals);
|
|
|
|
static const value_string q931_mode_vals[] = {
|
|
{ 0x20, "Normal mode" },
|
|
{ 0x40, "Extended mode" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
#define Q931_UIL3_X25_PL 0x06
|
|
#define Q931_UIL3_ISO_8208 0x07 /* X.25-based */
|
|
#define Q931_UIL3_X223 0x08 /* X.25-based */
|
|
#define Q931_UIL3_TR_9577 0x0B
|
|
#define Q931_UIL3_USER_SPEC 0x10
|
|
|
|
static const value_string q931_uil3_vals[] = {
|
|
{ 0x02, "Q.931/I.451" },
|
|
{ Q931_UIL3_X25_PL, "X.25, packet layer" },
|
|
{ Q931_UIL3_ISO_8208, "ISO/IEC 8208" },
|
|
{ Q931_UIL3_X223, "X.223/ISO 8878" },
|
|
{ 0x09, "ISO/IEC 8473" },
|
|
{ 0x0A, "T.70" },
|
|
{ Q931_UIL3_TR_9577, "ISO/IEC TR 9577" },
|
|
{ Q931_UIL3_USER_SPEC, "User-specified" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q931_protocol_discriminator(tvbuff_t *tvb, int offset, proto_tree *tree)
|
|
{
|
|
unsigned int discriminator = tvb_get_guint8(tvb, offset);
|
|
|
|
if (discriminator == NLPID_DMS) {
|
|
proto_tree_add_uint_format_value(tree, hf_q931_discriminator,
|
|
tvb, offset, 1, discriminator,
|
|
"Maintenance messages");
|
|
} else if (discriminator == NLPID_Q_931) {
|
|
proto_tree_add_uint_format_value(tree, hf_q931_discriminator,
|
|
tvb, offset, 1, discriminator,
|
|
"Q.931");
|
|
} else if (discriminator == NLPID_Q_2931) {
|
|
proto_tree_add_uint_format_value(tree, hf_q931_discriminator,
|
|
tvb, offset, 1, discriminator,
|
|
"Q.2931");
|
|
} else if ((discriminator >= 16 && discriminator < 63)
|
|
|| ((discriminator >= 80) && (discriminator < 254))) {
|
|
proto_tree_add_uint_format_value(tree, hf_q931_discriminator,
|
|
tvb, offset, 1, discriminator,
|
|
"Network layer or layer 3 protocol (0x%02X)",
|
|
discriminator);
|
|
} else if (discriminator >= 64 && discriminator <= 79) {
|
|
proto_tree_add_uint_format_value(tree, hf_q931_discriminator,
|
|
tvb, offset, 1, discriminator,
|
|
"National use (0x%02X)",
|
|
discriminator);
|
|
} else {
|
|
proto_tree_add_uint_format_value(tree, hf_q931_discriminator,
|
|
tvb, offset, 1, discriminator,
|
|
"Reserved (0x%02X)",
|
|
discriminator);
|
|
}
|
|
}
|
|
|
|
static const value_string q931_bearer_capability_layer_ident_vals[] = {
|
|
{ 0x01, "Layer 1 identifier" },
|
|
{ 0x02, "Layer 2 identifier" },
|
|
{ 0x03, "Layer 3 identifier" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
#define Q931_UIL2_USER_SPEC 0x10
|
|
|
|
static const range_string q931_l1_modem_type_rvals[] = {
|
|
{ 0x00, 0x05, "National use" },
|
|
{ 0x11, 0x11, "V.21" },
|
|
{ 0x12, 0x12, "V.22" },
|
|
{ 0x13, 0x13, "V.22 bis" },
|
|
{ 0x14, 0x14, "V.23" },
|
|
{ 0x15, 0x15, "V.26" },
|
|
{ 0x16, 0x16, "V.26 bis" },
|
|
{ 0x17, 0x17, "V.26 ter" },
|
|
{ 0x18, 0x18, "V.27" },
|
|
{ 0x19, 0x19, "V.27 bis" },
|
|
{ 0x1A, 0x1A, "V.27 ter" },
|
|
{ 0x1B, 0x1B, "V.29" },
|
|
{ 0x1C, 0x1C, "V.32" },
|
|
{ 0x1E, 0x1E, "V.34" },
|
|
{ 0x20, 0x2F, "National use" },
|
|
{ 0x30, 0x3F, "User specified" },
|
|
{ 0, 0, NULL }
|
|
};
|
|
|
|
static const true_false_string tfs_assignor_default = { "Assignor only", "Default assignee" };
|
|
static const true_false_string tfs_in_out_band = { "in-band", "out-of-band" };
|
|
static const true_false_string tfs_protocol_negotiation = { "Full protocol negotiation", "LLI = 256 only" };
|
|
|
|
void
|
|
dissect_q931_bearer_capability_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 octet;
|
|
guint8 coding_standard;
|
|
guint8 it_rate;
|
|
guint8 uil2_protocol;
|
|
guint8 uil3_protocol;
|
|
guint8 add_l3_info;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
coding_standard = octet & 0x60;
|
|
if (coding_standard != Q931_ITU_STANDARDIZED_CODING) {
|
|
/*
|
|
* We don't know how the bearer capability is encoded,
|
|
* so just dump it as data and be done with it.
|
|
*/
|
|
proto_tree_add_item(tree, hf_q931_bearer_capability_data, tvb, offset, len, ENC_NA);
|
|
proto_tree_add_boolean(tree, hf_q931_extension_ind, tvb, offset, 1, octet);
|
|
proto_tree_add_uint(tree, hf_q931_coding_standard, tvb, offset, 1, octet);
|
|
return;
|
|
}
|
|
proto_tree_add_boolean(tree, hf_q931_extension_ind, tvb, offset, 1, octet);
|
|
proto_tree_add_uint(tree, hf_q931_coding_standard, tvb, offset, 1, octet);
|
|
proto_tree_add_uint(tree, hf_q931_information_transfer_capability, tvb, offset, 1, octet);
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
/*
|
|
* XXX - only in Low-layer compatibility information element.
|
|
*/
|
|
if (!(octet & Q931_IE_VL_EXTENSION)) {
|
|
if (len == 0)
|
|
return;
|
|
proto_tree_add_item(tree, hf_q931_out_band_negotiation, tvb, offset, 1, ENC_NA);
|
|
offset += 1;
|
|
len -= 1;
|
|
}
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_boolean(tree, hf_q931_extension_ind, tvb, offset, 1, octet);
|
|
proto_tree_add_uint(tree, hf_q931_transfer_mode, tvb, offset, 1, octet);
|
|
proto_tree_add_uint(tree, hf_q931_information_transfer_rate, tvb, offset, 1, octet);
|
|
it_rate = octet & 0x1F;
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (it_rate == Q931_IT_RATE_MULTIRATE) {
|
|
if (len == 0)
|
|
return;
|
|
proto_tree_add_item(tree, hf_q931_bearer_capability_rate_multiplier, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
len -= 1;
|
|
}
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
if ((octet & 0x60) == 0x20) {
|
|
/*
|
|
* Layer 1 information.
|
|
*/
|
|
proto_tree_add_boolean(tree, hf_q931_extension_ind, tvb, offset, 1, octet);
|
|
proto_tree_add_uint(tree, hf_q931_layer_ident, tvb, offset, 1, octet);
|
|
proto_tree_add_uint(tree, hf_q931_uil1, tvb, offset, 1, octet);
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (octet & Q931_IE_VL_EXTENSION)
|
|
goto l1_done;
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(tree, hf_q931_layer_1, tvb, offset, 1, ENC_NA);
|
|
proto_tree_add_item(tree, hf_q931_layer_1_in_band_negotiation, tvb, offset, 1, ENC_NA);
|
|
proto_tree_add_item(tree, hf_q931_bearer_capability_user_rate, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (octet & Q931_IE_VL_EXTENSION)
|
|
goto l1_done;
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(tree, hf_q931_bearer_capability_intermediate_rate, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tree, hf_q931_send_data_net_independent_clock, tvb, offset, 1, ENC_NA);
|
|
proto_tree_add_item(tree, hf_q931_accept_data_net_independent_clock, tvb, offset, 1, ENC_NA);
|
|
proto_tree_add_item(tree, hf_q931_send_data_flow_control, tvb, offset, 1, ENC_NA);
|
|
proto_tree_add_item(tree, hf_q931_accept_data_flow_control, tvb, offset, 1, ENC_NA);
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (octet & Q931_IE_VL_EXTENSION)
|
|
goto l1_done;
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(tree, hf_q931_rate_adaption_header, tvb, offset, 1, ENC_NA);
|
|
proto_tree_add_item(tree, hf_q931_multiple_frame_establishment, tvb, offset, 1, ENC_NA);
|
|
proto_tree_add_item(tree, hf_q931_mode_of_operation, tvb, offset, 1, ENC_NA);
|
|
proto_tree_add_item(tree, hf_q931_protocol_negotiation, tvb, offset, 1, ENC_NA);
|
|
proto_tree_add_item(tree, hf_q931_message_originator, tvb, offset, 1, ENC_NA);
|
|
proto_tree_add_item(tree, hf_q931_negotiation_is_done, tvb, offset, 1, ENC_NA);
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (octet & Q931_IE_VL_EXTENSION)
|
|
goto l1_done;
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(tree, hf_q931_bearer_capability_stop_bits, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tree, hf_q931_bearer_capability_data_bits, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tree, hf_q931_bearer_capability_parity, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
if (octet & Q931_IE_VL_EXTENSION)
|
|
goto l1_done;
|
|
proto_tree_add_item(tree, hf_q931_bearer_capability_duplex, tvb, offset, 1, ENC_NA);
|
|
proto_tree_add_item(tree, hf_q931_bearer_capability_modem_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
len -= 1;
|
|
}
|
|
l1_done:
|
|
;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
if ((octet & 0x60) == 0x40) {
|
|
/*
|
|
* Layer 2 information.
|
|
*/
|
|
proto_tree_add_boolean(tree, hf_q931_extension_ind, tvb, offset, 1, octet);
|
|
proto_tree_add_uint(tree, hf_q931_layer_ident, tvb, offset, 1, octet);
|
|
uil2_protocol = octet & 0x1F;
|
|
proto_tree_add_item(tree, hf_q931_uil2, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
/*
|
|
* XXX - only in Low-layer compatibility information element.
|
|
*/
|
|
if (octet & Q931_IE_VL_EXTENSION)
|
|
goto l2_done;
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
if (uil2_protocol == Q931_UIL2_USER_SPEC) {
|
|
proto_tree_add_item(tree, hf_q931_uil2_info, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
} else {
|
|
proto_tree_add_item(tree, hf_q931_bearer_capability_mode, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
}
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (octet & Q931_IE_VL_EXTENSION)
|
|
goto l2_done;
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset) & 0x7F;
|
|
proto_tree_add_uint_format_value(tree, hf_q931_bearer_capability_window_size, tvb, offset, 1,
|
|
octet, "octet & 0x7F%u k", octet);
|
|
offset += 1;
|
|
len -= 1;
|
|
}
|
|
l2_done:
|
|
;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
if ((octet & 0x60) == 0x60) {
|
|
/*
|
|
* Layer 3 information.
|
|
*/
|
|
proto_tree_add_boolean(tree, hf_q931_extension_ind, tvb, offset, 1, octet);
|
|
proto_tree_add_uint(tree, hf_q931_layer_ident, tvb, offset, 1, octet);
|
|
uil3_protocol = octet & 0x1F;
|
|
proto_tree_add_item(tree, hf_q931_uil3, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
|
|
/*
|
|
* XXX - only in Low-layer compatibility information element.
|
|
*/
|
|
if (octet & Q931_IE_VL_EXTENSION)
|
|
goto l3_done;
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
switch (uil3_protocol) {
|
|
|
|
case Q931_UIL3_X25_PL:
|
|
case Q931_UIL3_ISO_8208:
|
|
case Q931_UIL3_X223:
|
|
proto_tree_add_item(tree, hf_q931_bearer_capability_mode, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (octet & Q931_IE_VL_EXTENSION)
|
|
goto l3_done;
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(tree, hf_q931_bearer_capability_default_packet_size, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (octet & Q931_IE_VL_EXTENSION)
|
|
goto l3_done;
|
|
if (len == 0)
|
|
return;
|
|
proto_tree_add_item(tree, hf_q931_bearer_capability_packet_window_size, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
/*offset += 1;*/
|
|
/*len -= 1;*/
|
|
break;
|
|
|
|
case Q931_UIL3_USER_SPEC:
|
|
proto_tree_add_uint(tree, hf_q931_bearer_capability_default_packet_size, tvb, offset, 1, 1 << (octet & 0x0F));
|
|
/*offset += 1;*/
|
|
/*len -= 1;*/
|
|
break;
|
|
|
|
case Q931_UIL3_TR_9577:
|
|
add_l3_info = (octet & 0x0F) << 4;
|
|
if (octet & Q931_IE_VL_EXTENSION)
|
|
goto l3_done;
|
|
if (len < 2)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset + 1);
|
|
add_l3_info |= (octet & 0x0F);
|
|
proto_tree_add_uint(tree, hf_q931_uil3_additional, tvb, offset, 2, add_l3_info);
|
|
/*offset += 2;*/
|
|
/*len -= 2;*/
|
|
break;
|
|
}
|
|
}
|
|
l3_done:
|
|
;
|
|
}
|
|
|
|
/*
|
|
* Dissect a Cause information element.
|
|
*/
|
|
|
|
|
|
static const value_string q931_cause_location_vals[] = {
|
|
{ 0x00, "User (U)" },
|
|
{ 0x01, "Private network serving the local user (LPN)" },
|
|
{ 0x02, "Public network serving the local user (LN)" },
|
|
{ 0x03, "Transit network (TN)" },
|
|
{ 0x04, "Public network serving the remote user (RLN)" },
|
|
{ 0x05, "Private network serving the remote user (RPN)" },
|
|
{ 0x06, "Unallocated code" },
|
|
{ 0x07, "International network (INTL)" },
|
|
{ 0x08, "Unallocated code" },
|
|
{ 0x09, "Unallocated code" },
|
|
{ 0x0A, "Network beyond interworking point (BI)" },
|
|
{ 0, NULL }
|
|
};
|
|
value_string_ext q931_cause_location_vals_ext = VALUE_STRING_EXT_INIT(q931_cause_location_vals);
|
|
|
|
static const value_string q931_cause_recommendation_vals[] = {
|
|
{ 0x00, "Q.931" },
|
|
{ 0x03, "X.21" },
|
|
{ 0x04, "X.25" },
|
|
{ 0x05, "Q.1031/Q.1051" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
/*
|
|
* Cause codes for Cause.
|
|
*/
|
|
#define Q931_CAUSE_UNALLOC_NUMBER 0x01
|
|
#define Q931_CAUSE_NO_ROUTE_TO_DEST 0x03
|
|
#define Q931_CAUSE_CALL_REJECTED 0x15
|
|
#define Q931_CAUSE_NUMBER_CHANGED 0x16
|
|
#define Q931_CAUSE_ACCESS_INFO_DISC 0x2B
|
|
#define Q931_CAUSE_QOS_UNAVAILABLE 0x31
|
|
#define Q931_CAUSE_CHAN_NONEXISTENT 0x52
|
|
#define Q931_CAUSE_INCOMPATIBLE_DEST 0x58
|
|
#define Q931_CAUSE_MAND_IE_MISSING 0x60
|
|
#define Q931_CAUSE_MT_NONEX_OR_UNIMPL 0x61
|
|
#define Q931_CAUSE_IE_NONEX_OR_UNIMPL 0x63
|
|
#define Q931_CAUSE_INVALID_IE_CONTENTS 0x64
|
|
#define Q931_CAUSE_MSG_INCOMPAT_W_CS 0x65
|
|
#define Q931_CAUSE_REC_TIMER_EXP 0x66
|
|
|
|
static const value_string q931_cause_code_vals[] = {
|
|
{ 0x00, "Valid cause code not yet received" },
|
|
{ Q931_CAUSE_UNALLOC_NUMBER, "Unallocated (unassigned) number" },
|
|
{ 0x02, "No route to specified transit network" },
|
|
{ Q931_CAUSE_NO_ROUTE_TO_DEST, "No route to destination" },
|
|
{ 0x04, "Send special information tone" },
|
|
{ 0x05, "Misdialled trunk prefix" },
|
|
{ 0x06, "Channel unacceptable" },
|
|
{ 0x07, "Call awarded and being delivered in an established channel" },
|
|
{ 0x08, "Prefix 0 dialed but not allowed" },
|
|
/* Q.850 - "Preemption" */
|
|
{ 0x09, "Prefix 1 dialed but not allowed" },
|
|
/* Q.850 - "Preemption - circuit reserved for reuse" */
|
|
{ 0x0A, "Prefix 1 dialed but not required" },
|
|
{ 0x0B, "More digits received than allowed, call is proceeding" },
|
|
{ 0x0E, "QoR: ported number" },
|
|
{ 0x10, "Normal call clearing" },
|
|
{ 0x11, "User busy" },
|
|
{ 0x12, "No user responding" },
|
|
{ 0x13, "No answer from user (user alerted)" },
|
|
{ 0x14, "Subscriber absent" },
|
|
{ Q931_CAUSE_CALL_REJECTED, "Call rejected" },
|
|
{ Q931_CAUSE_NUMBER_CHANGED, "Number changed" },
|
|
{ 0x17, "Reverse charging rejected" },
|
|
/* Q.850 - "Redirection to new destination" */
|
|
{ 0x18, "Call suspended" },
|
|
/* Q.850 Amendment 1 - "Call rejected due to feature at the destination" */
|
|
{ 0x19, "Call resumed" },
|
|
/* Q.850 - "Exchange routing error */
|
|
{ 0x1A, "Non-selected user clearing" },
|
|
{ 0x1B, "Destination out of order" },
|
|
{ 0x1C, "Invalid number format (incomplete number)" },
|
|
{ 0x1D, "Facility rejected" },
|
|
{ 0x1E, "Response to STATUS ENQUIRY" },
|
|
{ 0x1F, "Normal unspecified" },
|
|
{ 0x21, "Circuit out of order" },
|
|
{ 0x22, "No circuit/channel available" },
|
|
{ 0x23, "Destination unattainable" },
|
|
{ 0x25, "Degraded service" },
|
|
{ 0x26, "Network out of order" },
|
|
{ 0x27, "Transit delay range cannot be achieved" },
|
|
/* Q.850 - "Permanent frame mode connection out of service" */
|
|
{ 0x28, "Throughput range cannot be achieved" },
|
|
/* Q.850 - "Permanent frame mode connection operational" */
|
|
{ 0x29, "Temporary failure" },
|
|
{ 0x2A, "Switching equipment congestion" },
|
|
{ Q931_CAUSE_ACCESS_INFO_DISC, "Access information discarded" },
|
|
{ 0x2C, "Requested circuit/channel not available" },
|
|
{ 0x2D, "Pre-empted" },
|
|
{ 0x2E, "Precedence call blocked" },
|
|
{ 0x2F, "Resources unavailable, unspecified" },
|
|
{ Q931_CAUSE_QOS_UNAVAILABLE, "Quality of service unavailable" },
|
|
{ 0x32, "Requested facility not subscribed" },
|
|
{ 0x33, "Reverse charging not allowed" },
|
|
{ 0x34, "Outgoing calls barred" },
|
|
{ 0x35, "Outgoing calls barred within CUG" },
|
|
{ 0x36, "Incoming calls barred" },
|
|
{ 0x37, "Incoming calls barred within CUG" },
|
|
{ 0x38, "Call waiting not subscribed" },
|
|
{ 0x39, "Bearer capability not authorized" },
|
|
{ 0x3A, "Bearer capability not presently available" },
|
|
{ 0x3E, "Inconsistency in designated outgoing access information and subscriber class" },
|
|
{ 0x3F, "Service or option not available, unspecified" },
|
|
{ 0x41, "Bearer capability not implemented" },
|
|
{ 0x42, "Channel type not implemented" },
|
|
{ 0x43, "Transit network selection not implemented" },
|
|
{ 0x44, "Message not implemented" },
|
|
{ 0x45, "Requested facility not implemented" },
|
|
{ 0x46, "Only restricted digital information bearer capability is available" },
|
|
{ 0x4F, "Service or option not implemented, unspecified" },
|
|
{ 0x51, "Invalid call reference value" },
|
|
{ Q931_CAUSE_CHAN_NONEXISTENT, "Identified channel does not exist" },
|
|
{ 0x53, "Call identity does not exist for suspended call" },
|
|
{ 0x54, "Call identity in use" },
|
|
{ 0x55, "No call suspended" },
|
|
{ 0x56, "Call having the requested call identity has been cleared" },
|
|
{ 0x57, "Called user not member of CUG" },
|
|
{ Q931_CAUSE_INCOMPATIBLE_DEST, "Incompatible destination" },
|
|
{ 0x59, "Non-existent abbreviated address entry" },
|
|
{ 0x5A, "Destination address missing, and direct call not subscribed" },
|
|
/* Q.850 - "Non-existent CUG" */
|
|
{ 0x5B, "Invalid transit network selection (national use)" },
|
|
{ 0x5C, "Invalid facility parameter" },
|
|
{ 0x5D, "Mandatory information element is missing" },
|
|
{ 0x5F, "Invalid message, unspecified" },
|
|
{ Q931_CAUSE_MAND_IE_MISSING, "Mandatory information element is missing" },
|
|
{ Q931_CAUSE_MT_NONEX_OR_UNIMPL, "Message type non-existent or not implemented" },
|
|
{ 0x62, "Message not compatible with call state or message type non-existent or not implemented" },
|
|
{ Q931_CAUSE_IE_NONEX_OR_UNIMPL, "Information element non-existent or not implemented" },
|
|
{ Q931_CAUSE_INVALID_IE_CONTENTS, "Invalid information element contents" },
|
|
{ Q931_CAUSE_MSG_INCOMPAT_W_CS, "Message not compatible with call state" },
|
|
{ Q931_CAUSE_REC_TIMER_EXP, "Recovery on timer expiry" },
|
|
{ 0x67, "Parameter non-existent or not implemented - passed on" },
|
|
{ 0x6E, "Message with unrecognized parameter discarded" },
|
|
{ 0x6F, "Protocol error, unspecified" },
|
|
{ 0x7F, "Internetworking, unspecified" },
|
|
{ 0, NULL }
|
|
};
|
|
value_string_ext q931_cause_code_vals_ext = VALUE_STRING_EXT_INIT(q931_cause_code_vals);
|
|
|
|
static const value_string q931_cause_condition_vals[] = {
|
|
{ 0x00, "Unknown" },
|
|
{ 0x01, "Permanent" },
|
|
{ 0x02, "Transient" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
#define Q931_REJ_USER_SPECIFIC 0x00
|
|
#define Q931_REJ_IE_MISSING 0x04
|
|
#define Q931_REJ_IE_INSUFFICIENT 0x08
|
|
|
|
static const value_string q931_rejection_reason_vals[] = {
|
|
{ 0x00, "User specific" },
|
|
{ 0x04, "Information element missing" },
|
|
{ 0x08, "Information element contents are not sufficient" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
static const gchar *get_message_name(guint8 prot_discr, guint8 message_type) {
|
|
if (prot_discr == NLPID_DMS)
|
|
return val_to_str(message_type, dms_message_type_vals, "Unknown (0x%02X)");
|
|
else
|
|
return val_to_str_ext(message_type, &q931_message_type_vals_ext, "Unknown (0x%02X)");
|
|
}
|
|
|
|
static const true_false_string tfs_abnormal_normal = { "Abnormal", "Normal" };
|
|
|
|
static void
|
|
dissect_q931_cause_ie_with_info(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree, int hf_cause_value, guint8 *cause_value, const value_string *ie_vals,
|
|
q931_packet_info *q931_pi)
|
|
{
|
|
guint8 octet;
|
|
guint8 coding_standard;
|
|
guint8 rejection_reason;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
coding_standard = octet & 0x60;
|
|
if (coding_standard != Q931_ITU_STANDARDIZED_CODING &&
|
|
!g931_iso_iec_cause && coding_standard != Q931_ISO_IEC_STANDARDIZED_CODING) {
|
|
/*
|
|
* We don't know how the cause is encoded,
|
|
* so just dump it as data and be done with it.
|
|
*/
|
|
proto_tree_add_uint(tree, hf_q931_coding_standard, tvb, offset, 1, octet);
|
|
proto_tree_add_item(tree, hf_q931_cause_data, tvb, offset, len, ENC_NA);
|
|
return;
|
|
}
|
|
proto_tree_add_uint(tree, hf_q931_cause_location, tvb, offset, 1, octet);
|
|
proto_tree_add_uint(tree, hf_q931_coding_standard, tvb, offset, 1, octet);
|
|
proto_tree_add_boolean(tree, hf_q931_extension_ind, tvb, offset, 1, octet);
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (!(octet & Q931_IE_VL_EXTENSION)) {
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(tree, hf_q931_cause_recommendation, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_boolean(tree, hf_q931_extension_ind, tvb, offset, 1, octet);
|
|
offset += 1;
|
|
len -= 1;
|
|
}
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
*cause_value = octet & 0x7F;
|
|
|
|
/* add cause value to packet info for use in tap */
|
|
if (q931_pi) {
|
|
q931_pi->cause_value = *cause_value;
|
|
}
|
|
|
|
proto_tree_add_uint(tree, hf_cause_value, tvb, offset, 1, *cause_value);
|
|
proto_tree_add_boolean(tree, hf_q931_extension_ind, tvb, offset, 1, octet);
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (len == 0)
|
|
return;
|
|
switch (*cause_value) {
|
|
case Q931_CAUSE_UNALLOC_NUMBER:
|
|
case Q931_CAUSE_NO_ROUTE_TO_DEST:
|
|
case Q931_CAUSE_QOS_UNAVAILABLE:
|
|
proto_tree_add_item(tree, hf_q931_network_service, tvb, offset, 1, ENC_NA);
|
|
proto_tree_add_item(tree, hf_q931_extension_condition_type, tvb, offset, 1, ENC_NA);
|
|
proto_tree_add_item(tree, hf_q931_extension_condition, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case Q931_CAUSE_CALL_REJECTED:
|
|
rejection_reason = octet & 0x7C;
|
|
proto_tree_add_item(tree, hf_q931_cause_call_rejection_reason, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tree, hf_q931_cause_call_condition, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (len == 0)
|
|
return;
|
|
switch (rejection_reason) {
|
|
|
|
case Q931_REJ_USER_SPECIFIC:
|
|
proto_tree_add_item(tree, hf_q931_cause_call_user_specific_diagnostic, tvb, offset, len, ENC_NA);
|
|
break;
|
|
|
|
case Q931_REJ_IE_MISSING:
|
|
proto_tree_add_uint_format_value(tree, hf_q931_missing_info_element, tvb, offset, 1,
|
|
tvb_get_guint8(tvb, offset), "%s", val_to_str(tvb_get_guint8(tvb, offset), ie_vals,
|
|
"Unknown (0x%02X)"));
|
|
break;
|
|
|
|
case Q931_REJ_IE_INSUFFICIENT:
|
|
proto_tree_add_uint_format_value(tree, hf_q931_insufficient_info_element, tvb, offset, 1,
|
|
tvb_get_guint8(tvb, offset), "%s", val_to_str(tvb_get_guint8(tvb, offset), ie_vals,
|
|
"Unknown (0x%02X)"));
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_item(tree, hf_q931_cause_call_diagnostic, tvb, offset, len, ENC_NA);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case Q931_CAUSE_ACCESS_INFO_DISC:
|
|
case Q931_CAUSE_INCOMPATIBLE_DEST:
|
|
case Q931_CAUSE_MAND_IE_MISSING:
|
|
case Q931_CAUSE_IE_NONEX_OR_UNIMPL:
|
|
case Q931_CAUSE_INVALID_IE_CONTENTS:
|
|
do {
|
|
proto_tree_add_uint_format_value(tree, hf_q931_information_element, tvb, offset, 1,
|
|
tvb_get_guint8(tvb, offset), "%s", val_to_str(tvb_get_guint8(tvb, offset), ie_vals,
|
|
"Unknown (0x%02X)"));
|
|
offset += 1;
|
|
len -= 1;
|
|
} while (len != 0);
|
|
break;
|
|
|
|
case Q931_CAUSE_MT_NONEX_OR_UNIMPL:
|
|
case Q931_CAUSE_MSG_INCOMPAT_W_CS:
|
|
proto_tree_add_item(tree, hf_q931_cause_call_message_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case Q931_CAUSE_REC_TIMER_EXP:
|
|
if (len < 3)
|
|
return;
|
|
proto_tree_add_item(tree, hf_q931_cause_call_rec_timer, tvb, offset, 3, ENC_NA|ENC_ASCII);
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_item(tree, hf_q931_cause_call_diagnostic, tvb, offset, len, ENC_NA);
|
|
}
|
|
}
|
|
|
|
void
|
|
dissect_q931_cause_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree, int hf_cause_value, guint8 *cause_value, const value_string *ie_vals)
|
|
{
|
|
/* External dissectors have no use for "q931_packet_info". */
|
|
dissect_q931_cause_ie_with_info(tvb, offset, len, tree, hf_cause_value, cause_value, ie_vals, NULL);
|
|
}
|
|
|
|
/*
|
|
* Dissect a Change status information element.
|
|
*/
|
|
|
|
static const value_string q931_status_preference_vals[] = {
|
|
{ 0x01, "Channel" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string q931_new_status_vals[] = {
|
|
{ 0x00, "In Service" },
|
|
{ 0x01, "Maintenance" },
|
|
{ 0x02, "Out of Service" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q931_change_status_ie(tvbuff_t *tvb, int offset, int len _U_, proto_tree *tree)
|
|
{
|
|
if (len == 0)
|
|
return;
|
|
|
|
proto_tree_add_item(tree, hf_q931_extension_ind, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tree, hf_q931_extension_ind_preference, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tree, hf_q931_extension_ind_new_status, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
}
|
|
|
|
/*
|
|
* Dissect a Call state information element.
|
|
*/
|
|
static const value_string q931_call_state_vals[] = {
|
|
{ 0x00, "Null" },
|
|
{ 0x01, "Call initiated" },
|
|
{ 0x02, "Overlap sending" },
|
|
{ 0x03, "Outgoing call proceeding" },
|
|
{ 0x04, "Call delivered" },
|
|
{ 0x06, "Call present" },
|
|
{ 0x07, "Call received" },
|
|
{ 0x08, "Connect request" },
|
|
{ 0x09, "Incoming call proceeding" },
|
|
{ 0x0A, "Active" },
|
|
{ 0x0B, "Disconnect request" },
|
|
{ 0x0C, "Disconnect indication" },
|
|
{ 0x0F, "Suspend request" },
|
|
{ 0x11, "Resume request" },
|
|
{ 0x13, "Release request" },
|
|
{ 0x16, "Call abort"},
|
|
{ 0x19, "Overlap receiving" },
|
|
{ 0x3D, "Restart request" },
|
|
{ 0x3E, "Restart" },
|
|
{ 0, NULL }
|
|
};
|
|
value_string_ext q931_call_state_vals_ext = VALUE_STRING_EXT_INIT(q931_call_state_vals);
|
|
|
|
static void
|
|
dissect_q931_call_state_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 octet;
|
|
guint8 coding_standard;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
coding_standard = octet & 0x60;
|
|
proto_tree_add_uint(tree, hf_q931_coding_standard, tvb, offset, 1, octet);
|
|
if (coding_standard != Q931_ITU_STANDARDIZED_CODING) {
|
|
/*
|
|
* We don't know how the call state is encoded,
|
|
* so just dump it as data and be done with it.
|
|
*/
|
|
proto_tree_add_item(tree, hf_q931_call_state_data, tvb, offset, len, ENC_NA);
|
|
return;
|
|
}
|
|
proto_tree_add_item(tree, hf_q931_call_state, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
}
|
|
|
|
/*
|
|
* Dissect a Channel identification information element.
|
|
*/
|
|
#define Q931_INTERFACE_IDENTIFIED 0x40
|
|
#define Q931_NOT_BASIC_CHANNEL 0x20
|
|
|
|
static const value_string q931_basic_channel_selection_vals[] = {
|
|
{ 0x00, "No channel" },
|
|
{ 0x01, "B1 channel" },
|
|
{ 0x02, "B2 channel" },
|
|
{ 0x03, "Any channel" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string q931_not_basic_channel_selection_vals[] = {
|
|
{ 0x00, "No channel" },
|
|
{ 0x01, "Channel indicated in following octets" },
|
|
{ 0x03, "Any channel" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
#define Q931_IS_SLOT_MAP 0x10
|
|
|
|
static const value_string q931_element_type_vals[] = {
|
|
{ 0x03, "B-channel units" },
|
|
{ 0x06, "H0-channel units" },
|
|
{ 0x08, "H11-channel units" },
|
|
{ 0x09, "H12-channel units" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q931_channel_identification_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 octet;
|
|
guint8 coding_standard;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
|
|
proto_tree_add_item(tree, hf_q931_extension_ind, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tree, hf_q931_channel_interface_explicit, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tree, hf_q931_channel_interface_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tree, hf_q931_channel_exclusive, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tree, hf_q931_channel_dchan, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
if (octet & Q931_NOT_BASIC_CHANNEL) {
|
|
proto_tree_add_item(tree, hf_q931_channel_selection_pri, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
} else {
|
|
proto_tree_add_item(tree, hf_q931_channel_selection_bri, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
}
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (octet & Q931_INTERFACE_IDENTIFIED) {
|
|
guint8 octet2;
|
|
guint32 identifier_val = 0;
|
|
int identifier_offset = offset;
|
|
int identifier_len = 0;
|
|
do {
|
|
if (len == 0)
|
|
break;
|
|
octet2 = tvb_get_guint8(tvb, offset);
|
|
offset += 1;
|
|
len -= 1;
|
|
identifier_len++;
|
|
identifier_val <<= 7;
|
|
identifier_val |= octet2 & 0x7F;
|
|
} while (!(octet2 & Q931_IE_VL_EXTENSION));
|
|
|
|
if (identifier_len != 0) {
|
|
proto_tree_add_uint(tree, hf_q931_channel_interface_id, tvb, identifier_offset,
|
|
identifier_len, identifier_val);
|
|
}
|
|
}
|
|
|
|
if (octet & Q931_NOT_BASIC_CHANNEL) {
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
coding_standard = octet & 0x60;
|
|
proto_tree_add_item(tree, hf_q931_extension_ind, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_uint(tree, hf_q931_coding_standard, tvb, offset, 1, octet);
|
|
if (coding_standard != Q931_ITU_STANDARDIZED_CODING) {
|
|
/*
|
|
* We don't know how the channel identifier is
|
|
* encoded, so just dump it as data and be done
|
|
* with it.
|
|
*/
|
|
proto_tree_add_item(tree, hf_q931_channel_data, tvb, offset, len, ENC_NA);
|
|
return;
|
|
}
|
|
proto_tree_add_item(tree, hf_q931_channel_map, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tree, hf_q931_channel_element_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (octet & Q931_IS_SLOT_MAP) {
|
|
while (len) {
|
|
proto_tree_add_item(tree, hf_q931_channel_slot_map, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
len -= 1;
|
|
}
|
|
} else {
|
|
guint8 octet2;
|
|
do {
|
|
if (len == 0)
|
|
break;
|
|
octet2 = tvb_get_guint8(tvb, offset);
|
|
|
|
proto_tree_add_item(tree, hf_q931_extension_ind, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tree,hf_q931_channel_number,tvb,offset,1,ENC_BIG_ENDIAN);
|
|
|
|
offset += 1;
|
|
len -= 1;
|
|
} while (!(octet2 & Q931_IE_VL_EXTENSION));
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Dissect a Progress indicator information element.
|
|
*/
|
|
static const value_string q931_progress_description_vals[] = {
|
|
{ 0x01, "Call is not end-to-end ISDN - progress information available in-band" },
|
|
{ 0x02, "Destination address is non-ISDN" },
|
|
{ 0x03, "Origination address is non-ISDN" },
|
|
{ 0x04, "Call has returned to the ISDN" },
|
|
{ 0x05, "Interworking has occurred and has resulted in a telecommunications service change" },
|
|
{ 0x08, "In-band information or an appropriate pattern is now available" },
|
|
{ 0, NULL }
|
|
};
|
|
value_string_ext q931_progress_description_vals_ext = VALUE_STRING_EXT_INIT(q931_progress_description_vals);
|
|
|
|
void
|
|
dissect_q931_progress_indicator_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 octet;
|
|
guint8 coding_standard;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
coding_standard = octet & 0x60;
|
|
proto_tree_add_uint(tree, hf_q931_coding_standard, tvb, offset, 1, octet);
|
|
if (coding_standard != Q931_ITU_STANDARDIZED_CODING) {
|
|
/*
|
|
* We don't know how the progress indicator is encoded,
|
|
* so just dump it as data and be done with it.
|
|
*/
|
|
proto_tree_add_item(tree, hf_q931_progress_indicator_data, tvb, offset, len, ENC_NA);
|
|
return;
|
|
}
|
|
proto_tree_add_item(tree, hf_q931_progress_indicator_location, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (len == 0)
|
|
return;
|
|
|
|
proto_tree_add_item(tree, hf_q931_progress_indicator_description, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
}
|
|
|
|
/*
|
|
* Dissect a Network-specific facilities or Transit network selection
|
|
* information element.
|
|
*/
|
|
static const value_string q931_netid_type_vals[] = {
|
|
{ 0x00, "User specified" },
|
|
{ 0x20, "National network identification" },
|
|
{ 0x30, "International network identification" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string q931_netid_plan_vals[] = {
|
|
{ 0x00, "Unknown" },
|
|
{ 0x01, "Carrier Identification Code" },
|
|
{ 0x03, "X.121 data network identification code" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q931_ns_facilities_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 octet;
|
|
int netid_len;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
netid_len = octet & 0x7F;
|
|
proto_tree_add_item(tree, hf_q931_netid_length, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
len -= 1;
|
|
if (netid_len != 0) {
|
|
if (len == 0)
|
|
return;
|
|
proto_tree_add_item(tree, hf_q931_netid_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tree, hf_q931_netid_plan, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
len -= 1;
|
|
netid_len--;
|
|
|
|
if (len == 0)
|
|
return;
|
|
if (netid_len > len)
|
|
netid_len = len;
|
|
if (netid_len != 0) {
|
|
proto_tree_add_item(tree, hf_q931_netid, tvb, offset, netid_len, ENC_NA|ENC_ASCII);
|
|
offset += netid_len;
|
|
len -= netid_len;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Whatever is left is the network-specific facility
|
|
* specification.
|
|
*/
|
|
if (len == 0)
|
|
return;
|
|
proto_tree_add_item(tree, hf_q931_netid_facility_specification, tvb, offset, len, ENC_NA);
|
|
}
|
|
|
|
/*
|
|
* Dissect a Notification indicator information element.
|
|
*/
|
|
static const value_string q931_notification_description_vals[] = {
|
|
{ 0x00, "User suspended" },
|
|
{ 0x01, "User resumed" },
|
|
{ 0x02, "Bearer service change" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q931_notification_indicator_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
if (len == 0)
|
|
return;
|
|
|
|
proto_tree_add_item(tree, hf_q931_notification_description, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
}
|
|
|
|
/*
|
|
* Dissect a Date/time information element.
|
|
*/
|
|
static void
|
|
dissect_q931_date_time_ie(tvbuff_t *tvb, packet_info* pinfo, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
if (len == 6) {
|
|
/*
|
|
* XXX - what is "year" relative to? Is "month" 0-origin or
|
|
* 1-origin? Q.931 doesn't say....
|
|
*/
|
|
proto_tree_add_bytes_format_value(tree, hf_q931_date_time, tvb, offset, 6, NULL, "%02u-%02u-%02u %02u:%02u:%02u",
|
|
tvb_get_guint8(tvb, offset + 0), tvb_get_guint8(tvb, offset + 1), tvb_get_guint8(tvb, offset + 2),
|
|
tvb_get_guint8(tvb, offset + 3), tvb_get_guint8(tvb, offset + 4), tvb_get_guint8(tvb, offset + 5));
|
|
} else if (len == 5) {
|
|
proto_tree_add_bytes_format_value(tree, hf_q931_date_time, tvb, offset, 5, NULL, "%02u-%02u-%02u %02u:%02u:00",
|
|
tvb_get_guint8(tvb, offset + 0), tvb_get_guint8(tvb, offset + 1), tvb_get_guint8(tvb, offset + 2),
|
|
tvb_get_guint8(tvb, offset + 3), tvb_get_guint8(tvb, offset + 4));
|
|
} else {
|
|
proto_tree_add_expert_format(tree, pinfo, &ei_q931_date_time, tvb, offset, len, "Date/time: length is %d, should be 5 or 6", len);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Dissect a Signal information element.
|
|
*/
|
|
static const value_string q931_signal_vals[] = {
|
|
{ 0x00, "Dial tone on" },
|
|
{ 0x01, "Ring tone on" },
|
|
{ 0x02, "Intercept tone on" },
|
|
{ 0x03, "Network congestion tone on" }, /* "fast busy" */
|
|
{ 0x04, "Busy tone on" },
|
|
{ 0x05, "Confirm tone on" },
|
|
{ 0x06, "Answer tone on" },
|
|
{ 0x07, "Call waiting tone on" },
|
|
{ 0x08, "Off-hook warning tone on" },
|
|
{ 0x09, "Preemption tone on" },
|
|
{ 0x3F, "Tones off" },
|
|
{ 0x40, "Alerting on - pattern 0" },
|
|
{ 0x41, "Alerting on - pattern 1" },
|
|
{ 0x42, "Alerting on - pattern 2" },
|
|
{ 0x43, "Alerting on - pattern 3" },
|
|
{ 0x44, "Alerting on - pattern 4" },
|
|
{ 0x45, "Alerting on - pattern 5" },
|
|
{ 0x46, "Alerting on - pattern 6" },
|
|
{ 0x47, "Alerting on - pattern 7" },
|
|
{ 0x4F, "Alerting off" },
|
|
{ 0, NULL }
|
|
};
|
|
static value_string_ext q931_signal_vals_ext = VALUE_STRING_EXT_INIT(q931_signal_vals);
|
|
|
|
static void
|
|
dissect_q931_signal_ie(tvbuff_t *tvb, packet_info *pinfo, int offset, int len,
|
|
proto_tree *tree, proto_item* item)
|
|
{
|
|
if (len != 1) {
|
|
expert_add_info_format(pinfo, item, &ei_q931_invalid_length,
|
|
"Signal: length is %d, should be 1", len);
|
|
return;
|
|
}
|
|
proto_tree_add_item(tree, hf_q931_signal, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
}
|
|
|
|
/*
|
|
* Dissect an Information rate information element.
|
|
*/
|
|
static const value_string q931_throughput_class_vals[] = {
|
|
{ 0x03, "75 bit/s" },
|
|
{ 0x04, "150 bit/s" },
|
|
{ 0x05, "300 bit/s" },
|
|
{ 0x06, "600 bit/s" },
|
|
{ 0x07, "1200 bit/s" },
|
|
{ 0x08, "2400 bit/s" },
|
|
{ 0x09, "4800 bit/s" },
|
|
{ 0x0A, "9600 bit/s" },
|
|
{ 0x0B, "19200 bit/s" },
|
|
{ 0x0C, "48000 bit/s" },
|
|
{ 0x0D, "64000 bit/s" },
|
|
{ 0, NULL }
|
|
};
|
|
static value_string_ext q931_throughput_class_vals_ext = VALUE_STRING_EXT_INIT(q931_throughput_class_vals);
|
|
|
|
static void
|
|
dissect_q931_information_rate_ie(tvbuff_t *tvb, packet_info *pinfo, int offset, int len,
|
|
proto_tree *tree, proto_item* item)
|
|
{
|
|
if (len != 4) {
|
|
expert_add_info_format(pinfo, item, &ei_q931_invalid_length,
|
|
"Information rate: length is %d, should be 4", len);
|
|
return;
|
|
}
|
|
proto_tree_add_item(tree, hf_q931_information_rate_incoming, tvb, offset + 0, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tree, hf_q931_information_rate_outgoing, tvb, offset + 1, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tree, hf_q931_information_rate_minimum_incoming, tvb, offset + 2, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tree, hf_q931_information_rate_minimum_outgoing, tvb, offset + 3, 1, ENC_BIG_ENDIAN);
|
|
}
|
|
|
|
static int
|
|
dissect_q931_guint16_value(tvbuff_t *tvb, packet_info *pinfo, int offset, int len,
|
|
proto_tree *tree, proto_item* item, int hf_value)
|
|
{
|
|
guint8 octet;
|
|
guint16 value;
|
|
int value_len;
|
|
|
|
value_len = 0;
|
|
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
if (octet & Q931_IE_VL_EXTENSION) {
|
|
/*
|
|
* Only one octet long - error.
|
|
*/
|
|
goto bad_length;
|
|
}
|
|
value = (octet & 0x3) << 14;
|
|
offset += 1;
|
|
len -= 1;
|
|
value_len++;
|
|
|
|
if (len == 0) {
|
|
/*
|
|
* We've reached the end of the information element - error.
|
|
*/
|
|
goto past_end;
|
|
}
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
if (octet & Q931_IE_VL_EXTENSION) {
|
|
/*
|
|
* Only two octets long - error.
|
|
*/
|
|
goto bad_length;
|
|
}
|
|
value |= (octet & 0x7F) << 7;
|
|
offset += 1;
|
|
len -= 1;
|
|
value_len++;
|
|
|
|
if (len == 0) {
|
|
/*
|
|
* We've reached the end of the information element - error.
|
|
*/
|
|
goto past_end;
|
|
}
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
if (!(octet & Q931_IE_VL_EXTENSION)) {
|
|
/*
|
|
* More than three octets long - error.
|
|
*/
|
|
goto bad_length;
|
|
}
|
|
value |= (octet & 0x7F);
|
|
offset += 1;
|
|
/*len -= 1;*/
|
|
value_len++;
|
|
|
|
proto_tree_add_uint(tree, hf_value, tvb, offset, value_len, value);
|
|
return value_len;
|
|
|
|
past_end:
|
|
expert_add_info_format(pinfo, item, &ei_q931_invalid_length,
|
|
"%s goes past end of information element", proto_registrar_get_name(hf_value));
|
|
return -1;
|
|
|
|
bad_length:
|
|
expert_add_info_format(pinfo, item, &ei_q931_invalid_length, "%s isn't 3 octets long",
|
|
proto_registrar_get_name(hf_value));
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* Dissect an End-to-end transit delay information element.
|
|
*/
|
|
static void
|
|
dissect_q931_e2e_transit_delay_ie(tvbuff_t *tvb, packet_info *pinfo, int offset, int len,
|
|
proto_tree *tree, proto_item* item)
|
|
{
|
|
int value_len;
|
|
|
|
if (len == 0)
|
|
return;
|
|
value_len = dissect_q931_guint16_value(tvb, pinfo, offset, len, tree, item, hf_q931_cumulative_transit_delay);
|
|
if (value_len < 0)
|
|
return; /* error */
|
|
offset += value_len;
|
|
len -= value_len;
|
|
|
|
if (len == 0)
|
|
return;
|
|
value_len = dissect_q931_guint16_value(tvb, pinfo, offset, len, tree, item, hf_q931_requested_end_to_end_transit_delay);
|
|
if (value_len < 0)
|
|
return; /* error */
|
|
offset += value_len;
|
|
len -= value_len;
|
|
|
|
if (len == 0)
|
|
return;
|
|
dissect_q931_guint16_value(tvb, pinfo, offset, len, tree, item, hf_q931_maximum_end_to_end_transit_delay);
|
|
}
|
|
|
|
/*
|
|
* Dissect a Transit delay selection and indication information element.
|
|
*/
|
|
static void
|
|
dissect_q931_td_selection_and_int_ie(tvbuff_t *tvb, packet_info *pinfo, int offset, int len,
|
|
proto_tree *tree, proto_item* item)
|
|
{
|
|
if (len == 0)
|
|
return;
|
|
dissect_q931_guint16_value(tvb, pinfo, offset, len, tree, item, hf_q931_transit_delay);
|
|
}
|
|
|
|
/*
|
|
* Dissect a Packet layer binary parameters information element.
|
|
*/
|
|
static const value_string q931_fast_selected_vals[] = {
|
|
{ 0x00, "Fast select not requested" },
|
|
{ 0x08, "Fast select not requested" },
|
|
{ 0x10, "Fast select requested with no restriction of response" },
|
|
{ 0x18, "Fast select requested with restrictions of response" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
static const true_false_string tfs_link_end = { "Link-by-link", "End-to-end" };
|
|
static const true_false_string tfs_pl_request = { "No request/request denied", "Request indicated/request accepted" };
|
|
static const true_false_string tfs_pl_modulus = { "8 sequencing", "128 sequencing" };
|
|
|
|
static void
|
|
dissect_q931_pl_binary_parameters_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
static int * const fields[] = {
|
|
&hf_q931_fast_select,
|
|
&hf_q931_pl_request,
|
|
&hf_q931_pl_binary_confirmation,
|
|
&hf_q931_pl_modulus,
|
|
NULL
|
|
};
|
|
|
|
if (len == 0)
|
|
return;
|
|
|
|
proto_tree_add_bitmask_list(tree, tvb, offset, 1, fields, ENC_NA);
|
|
}
|
|
|
|
/*
|
|
* Dissect a Packet layer window size information element.
|
|
*/
|
|
static void
|
|
dissect_q931_pl_window_size_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
if (len == 0)
|
|
return;
|
|
proto_tree_add_item(tree, hf_q931_pl_window_size_forward_value, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (len == 0)
|
|
return;
|
|
proto_tree_add_item(tree, hf_q931_pl_window_size_backward_value, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
}
|
|
|
|
/*
|
|
* Dissect a Packet size information element.
|
|
*/
|
|
static void
|
|
dissect_q931_packet_size_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
if (len == 0)
|
|
return;
|
|
proto_tree_add_item(tree, hf_q931_packet_size_forward_value, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (len == 0)
|
|
return;
|
|
proto_tree_add_item(tree, hf_q931_packet_size_backward_value, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
}
|
|
|
|
/*
|
|
* Dissect a Closed user group information element.
|
|
*/
|
|
static const value_string q931_cug_indication_vals[] = {
|
|
{ 0x01, "Closed user group selection" },
|
|
{ 0x02, "Closed user group with outgoing access selection and indication" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q931_cug_ie(tvbuff_t *tvb, int offset, int len, proto_tree *tree)
|
|
{
|
|
if (len == 0)
|
|
return;
|
|
proto_tree_add_item(tree, hf_q931_cug_indication, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (len == 0)
|
|
return;
|
|
proto_tree_add_item(tree, hf_q931_cug_index_code, tvb, offset, len, ENC_NA|ENC_ASCII);
|
|
}
|
|
|
|
/*
|
|
* Dissect a Reverse charging indication information element.
|
|
*/
|
|
static const value_string q931_reverse_charging_indication_vals[] = {
|
|
{ 0x01, "Reverse charging requested" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q931_reverse_charge_ind_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
if (len == 0)
|
|
return;
|
|
proto_tree_add_item(tree, hf_q931_reverse_charging_ind, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
}
|
|
|
|
/*
|
|
* Dissect a (phone) number information element.
|
|
*/
|
|
static const value_string q931_number_type_vals[] = {
|
|
{ 0x0, "Unknown" },
|
|
{ 0x1, "International number" },
|
|
{ 0x2, "National number" },
|
|
{ 0x3, "Network specific number" },
|
|
{ 0x4, "Subscriber number" },
|
|
{ 0x6, "Abbreviated number" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string q931_numbering_plan_vals[] = {
|
|
{ 0x00, "Unknown" },
|
|
{ 0x01, "E.164 ISDN/telephony numbering" },
|
|
{ 0x03, "X.121 data numbering" },
|
|
{ 0x04, "F.69 Telex numbering" },
|
|
{ 0x08, "National standard numbering" },
|
|
{ 0x09, "Private numbering" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string q931_presentation_indicator_vals[] = {
|
|
{ 0x00, "Presentation allowed" },
|
|
{ 0x01, "Presentation restricted" },
|
|
{ 0x02, "Number not available due to interworking" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string q931_screening_indicator_vals[] = {
|
|
{ 0x00, "User-provided, not screened" },
|
|
{ 0x01, "User-provided, verified and passed" },
|
|
{ 0x02, "User-provided, verified and failed" },
|
|
{ 0x03, "Network-provided" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string q931_redirection_reason_vals[] = {
|
|
{ 0x00, "Unknown" },
|
|
{ 0x01, "Call forwarding busy or called DTE busy" },
|
|
{ 0x02, "Call forwarding no reply" },
|
|
{ 0x04, "Call deflection" },
|
|
{ 0x09, "Called DTE out of order" },
|
|
{ 0x0A, "Call forwarding by the called DTE" },
|
|
{ 0x0F, "Call forwarding unconditional or systematic call redirection" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q931_number_ie(packet_info *pinfo, tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree, int hfindex, e164_info_t e164_info, q931_packet_info *q931_pi)
|
|
{
|
|
guint8 octet;
|
|
gint number_plan;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
number_plan = octet & 0x0f;
|
|
e164_info.nature_of_address = ( octet & 0x70 ) >> 4;
|
|
proto_tree_add_uint(tree, hf_q931_numbering_plan, tvb, offset, 1, octet);
|
|
proto_tree_add_uint(tree, hf_q931_number_type, tvb, offset, 1, octet);
|
|
proto_tree_add_boolean(tree, hf_q931_extension_ind, tvb, offset, 1, octet);
|
|
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (!(octet & Q931_IE_VL_EXTENSION)) {
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_uint(tree, hf_q931_screening_ind, tvb, offset, 1, octet);
|
|
proto_tree_add_uint(tree, hf_q931_presentation_ind, tvb, offset, 1, octet);
|
|
proto_tree_add_boolean(tree, hf_q931_extension_ind, tvb, offset, 1, octet);
|
|
offset += 1;
|
|
len -= 1;
|
|
}
|
|
|
|
/*
|
|
* XXX - only in a Redirecting number information element.
|
|
*/
|
|
if (!(octet & Q931_IE_VL_EXTENSION)) {
|
|
if (len == 0)
|
|
return;
|
|
proto_tree_add_item(tree, hf_q931_extension_reason, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
len -= 1;
|
|
}
|
|
|
|
if (len == 0)
|
|
return;
|
|
proto_tree_add_item(tree, hfindex, tvb, offset, len, ENC_ASCII|ENC_NA);
|
|
proto_item_append_text(proto_tree_get_parent(tree), ": '%s'", tvb_format_text(pinfo->pool, tvb, offset, len));
|
|
|
|
if ( number_plan == 1 ) {
|
|
if ( e164_info.e164_number_type != NONE ){
|
|
|
|
e164_info.E164_number_str = tvb_get_string_enc(pinfo->pool, tvb, offset, len, ENC_ASCII|ENC_NA);
|
|
e164_info.E164_number_length = len;
|
|
dissect_e164_number(tvb, tree, offset, len, e164_info);
|
|
}
|
|
}
|
|
|
|
/* Collect q931_packet_info */
|
|
if ( e164_info.e164_number_type == CALLING_PARTY_NUMBER && q931_pi)
|
|
q931_pi->calling_number = tvb_get_string_enc(pinfo->pool, tvb, offset, len, ENC_ASCII|ENC_NA);
|
|
if ( e164_info.e164_number_type == CALLED_PARTY_NUMBER && q931_pi)
|
|
q931_pi->called_number = tvb_get_string_enc(pinfo->pool, tvb, offset, len, ENC_ASCII|ENC_NA);
|
|
}
|
|
|
|
/*
|
|
* Dissect a party subaddress information element.
|
|
*/
|
|
static const value_string q931_subaddress_type_vals[] = {
|
|
{ 0x00, "X.213/ISO 8348 Add.2 NSAP" },
|
|
{ 0x20, "User-specified" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static const value_string q931_odd_even_indicator_vals[] = {
|
|
{ 0x00, "Even number of address signals" },
|
|
{ 0x08, "Odd number of address signals" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q931_party_subaddr_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
if (len == 0)
|
|
return;
|
|
|
|
proto_tree_add_item(tree, hf_q931_party_subaddr_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(tree, hf_q931_party_subaddr_odd_even_indicator, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (len == 0)
|
|
return;
|
|
proto_tree_add_item(tree, hf_q931_party_subaddr, tvb, offset, len, ENC_NA);
|
|
}
|
|
|
|
/*
|
|
* Dissect a Restart indicator information element.
|
|
*/
|
|
static const value_string q931_restart_indicator_class_vals[] = {
|
|
{ 0x00, "Indicated channels" },
|
|
{ 0x06, "Single interface" },
|
|
{ 0x07, "All interfaces" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q931_restart_indicator_ie(tvbuff_t *tvb, packet_info *pinfo, int offset, int len,
|
|
proto_tree *tree, proto_item* item)
|
|
{
|
|
if (len != 1) {
|
|
expert_add_info_format(pinfo, item, &ei_q931_invalid_length,
|
|
"Restart indicator: length is %d, should be 1", len);
|
|
return;
|
|
}
|
|
proto_tree_add_item(tree, hf_q931_restart_indicator, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
}
|
|
|
|
/*
|
|
* Dissect a High-layer compatibility information element.
|
|
*/
|
|
#define Q931_MAINTENANCE 0x5e
|
|
#define Q931_MANAGEMENT 0x5f
|
|
#define Q931_AUDIOVISUAL 0x60
|
|
static const value_string q931_high_layer_characteristics_vals[] = {
|
|
{ 0x01, "Telephony" },
|
|
{ 0x04, "F.182 Facsimile Group 2/3" },
|
|
{ 0x21, "F.184 Facsimile Group 4 Class I" },
|
|
{ 0x24, "F.230 Teletex, basic and mixed mode, and F.184 Facsimile Group 4, Classes II and III" },
|
|
{ 0x28, "F.220 Teletex, basic and processable mode" },
|
|
{ 0x31, "F.200 Teletex, basic mode" },
|
|
{ 0x32, "F.300 and T.102 syntax-based Videotex" },
|
|
{ 0x33, "F.300 and T.101 international Videotex interworking" },
|
|
{ 0x35, "F.60 Telex" },
|
|
{ 0x38, "X.400 Message Handling Systems" },
|
|
{ 0x41, "X.200 OSI application" },
|
|
{ 0x42, "FTAM application" },
|
|
{ 0x5E, "Reserved for maintenance" },
|
|
{ 0x5F, "Reserved for management" },
|
|
{ Q931_AUDIOVISUAL, "F.720/F.821 and F.731 Profile 1a videotelephony" },
|
|
{ 0x61, "F.702 and F.731 Profile 1b videoconferencing" },
|
|
{ 0x62, "F.702 and F.731 audiographic conferencing" },
|
|
{ 0x68, "F.700-series Multimedia services" },
|
|
{ 0, NULL }
|
|
};
|
|
static value_string_ext q931_high_layer_characteristics_vals_ext = VALUE_STRING_EXT_INIT(q931_high_layer_characteristics_vals);
|
|
|
|
static const value_string q931_extended_high_layer_characteristics_vals[] = {
|
|
{ 0x01, "Telephony" },
|
|
{ 0x04, "F.182 Facsimile Group 2/3" },
|
|
{ 0x21, "F.184 Facsimile Group 4 Class I" },
|
|
{ 0x24, "F.230 Teletex, basic and mixed mode, and F.184 Facsimile Group 4, Classes II and III" },
|
|
{ 0x28, "F.220 Teletex, basic and processable mode" },
|
|
{ 0x31, "F.200 Teletex, basic mode" },
|
|
{ 0x32, "F.300 and T.102 syntax-based Videotex" },
|
|
{ 0x33, "F.300 and T.101 international Videotex interworking" },
|
|
{ 0x35, "F.60 Telex" },
|
|
{ 0x38, "X.400 Message Handling Systems" },
|
|
{ 0x41, "X.200 OSI application" },
|
|
{ 0x42, "FTAM application" },
|
|
{ 0x5E, "Not available for assignment" },
|
|
{ 0x5F, "Not available for assignment" },
|
|
{ Q931_AUDIOVISUAL, "F.720/F.821 and F.731 Profile 1a videotelephony" },
|
|
{ 0x61, "F.702 and F.731 Profile 1b videoconferencing" },
|
|
{ 0x62, "F.702 and F.731 audiographic conferencing" },
|
|
{ 0x68, "F.700-series Multimedia services" },
|
|
{ 0, NULL }
|
|
};
|
|
static value_string_ext q931_extended_high_layer_characteristics_vals_ext = VALUE_STRING_EXT_INIT(q931_extended_high_layer_characteristics_vals);
|
|
|
|
static const value_string q931_audiovisual_characteristics_vals[] = {
|
|
{ 0x01, "Capability set of initial channel of H.221" },
|
|
{ 0x02, "Capability set of subsequent channel of H.221" },
|
|
{ 0x21, "Capability set of initial channel of an active 3.1kHz audio or speech call" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
static const value_string q931_interpretation_vals[] = {
|
|
{ 0x04, "First (primary or only) high layer characteristics identification to be used in the call" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
static const value_string q931_pres_meth_prot_prof_vals[] = {
|
|
{ 0x01, "High layer protocol profile (without specification of attributes)" },
|
|
{ 0x00, NULL }
|
|
};
|
|
|
|
/*
|
|
* High layer protocol profile
|
|
*/
|
|
#define Q931_HIGH_LAYER_PROTOCOL_PROFILE 0x01
|
|
|
|
void
|
|
dissect_q931_high_layer_compat_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 octet;
|
|
guint8 coding_standard;
|
|
guint8 pres_method;
|
|
guint8 characteristics;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
coding_standard = octet & 0x60;
|
|
pres_method = octet & 0x03;
|
|
|
|
proto_tree_add_item(tree, hf_q931_extension_ind, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_uint(tree, hf_q931_coding_standard, tvb, offset, 1, octet);
|
|
proto_tree_add_uint(tree, hf_q931_interpretation, tvb, offset, 1, octet);
|
|
proto_tree_add_uint(tree, hf_q931_pres_meth_prot_prof, tvb, offset, 1, octet);
|
|
|
|
offset += 1;
|
|
len -= 1;
|
|
if ((coding_standard != Q931_ITU_STANDARDIZED_CODING) || (pres_method != Q931_HIGH_LAYER_PROTOCOL_PROFILE)) {
|
|
/*
|
|
* We don't know how the call state is encoded,
|
|
* so just dump it as data and be done with it.
|
|
*/
|
|
proto_tree_add_item(tree, hf_q931_high_layer_compat_data, tvb, offset, len, ENC_NA);
|
|
return;
|
|
}
|
|
if (len == 0)
|
|
return;
|
|
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
characteristics = octet & 0x7F;
|
|
|
|
proto_tree_add_item(tree, hf_q931_extension_ind, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_uint(tree, hf_q931_high_layer_characteristics, tvb, offset, 1, octet);
|
|
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (!(octet & Q931_IE_VL_EXTENSION)) {
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
if ((characteristics == Q931_AUDIOVISUAL) || (characteristics == 0x61) || (characteristics == 0x62) ||
|
|
(characteristics == 0x68)) {
|
|
proto_tree_add_item(tree, hf_q931_extension_ind, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_uint(tree, hf_q931_extended_audiovisual_characteristics, tvb, offset, 1, octet);
|
|
}
|
|
else if ((characteristics == Q931_MANAGEMENT) || (characteristics == Q931_MAINTENANCE)) {
|
|
proto_tree_add_item(tree, hf_q931_extension_ind, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
proto_tree_add_uint(tree, hf_q931_extended_high_layer_characteristics, tvb, offset, 1, octet);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* Dissect a User-user information element.
|
|
*/
|
|
#define Q931_PROTOCOL_DISCRIMINATOR_USER 0x00
|
|
#define Q931_PROTOCOL_DISCRIMINATOR_IA5 0x04
|
|
#define Q931_PROTOCOL_DISCRIMINATOR_ASN1 0x05
|
|
|
|
static const value_string q931_protocol_discriminator_vals[] = {
|
|
{ Q931_PROTOCOL_DISCRIMINATOR_USER, "User-specific protocol" },
|
|
{ 0x01, "OSI high layer protocols" },
|
|
{ 0x02, "X.244" },
|
|
{ 0x03, "Reserved for system management convergence function" },
|
|
{ Q931_PROTOCOL_DISCRIMINATOR_IA5, "IA5 characters" },
|
|
{ Q931_PROTOCOL_DISCRIMINATOR_ASN1, "X.208 and X.209 coded user information" },
|
|
{ 0x06, "Undefined" },
|
|
{ 0x07, "V.120 rate adaption" },
|
|
{ 0x08, "Q.931/I.451 user-network call control messages" },
|
|
{ 0, NULL }
|
|
};
|
|
value_string_ext q931_protocol_discriminator_vals_ext = VALUE_STRING_EXT_INIT(q931_protocol_discriminator_vals);
|
|
|
|
void
|
|
dissect_q931_user_user_ie(tvbuff_t *tvb, packet_info *pinfo, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
guint8 octet;
|
|
tvbuff_t *next_tvb = NULL;
|
|
heur_dtbl_entry_t *hdtbl_entry;
|
|
|
|
if (len == 0)
|
|
return;
|
|
octet = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_item(tree, hf_q931_user_protocol_discriminator, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
len -= 1;
|
|
|
|
if (len == 0)
|
|
return;
|
|
switch (octet) {
|
|
|
|
case Q931_PROTOCOL_DISCRIMINATOR_USER:
|
|
next_tvb = tvb_new_subset_length(tvb, offset, len);
|
|
proto_tree_add_uint_format_value(tree, hf_q931_user_information_len, tvb, offset, len, len, "%d octets", len);
|
|
if (!dissector_try_heuristic(q931_user_heur_subdissector_list, next_tvb, pinfo, tree, &hdtbl_entry, NULL)) {
|
|
call_data_dissector(next_tvb, pinfo, tree);
|
|
}
|
|
break;
|
|
|
|
case Q931_PROTOCOL_DISCRIMINATOR_IA5:
|
|
proto_tree_add_item(tree, hf_q931_user_information_str, tvb, offset, len, ENC_NA|ENC_ASCII);
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_item(tree, hf_q931_user_information_bytes, tvb, offset, len, ENC_NA);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static const value_string q931_party_category_vals[] = {
|
|
{ 0x00, "Unknown" },
|
|
{ 0x01, "Extension" },
|
|
{ 0x02, "Operator" },
|
|
{ 0x03, "Emergency extension" },
|
|
{ 0, NULL }
|
|
};
|
|
|
|
static void
|
|
dissect_q931_party_category_ie(tvbuff_t *tvb, int offset, int len,
|
|
proto_tree *tree)
|
|
{
|
|
if (len == 0)
|
|
return;
|
|
|
|
proto_tree_add_item(tree, hf_q931_party_category, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
/*offset += 1;
|
|
len -= 1;
|
|
|
|
if (len == 0)
|
|
return;
|
|
*/
|
|
}
|
|
|
|
/*
|
|
* Dissect information elements consisting of ASCII^H^H^H^H^HIA5 text.
|
|
*/
|
|
static void
|
|
dissect_q931_ia5_ie(tvbuff_t *tvb, int offset, int len, proto_tree *tree,
|
|
int hf_value)
|
|
{
|
|
if (len != 0) {
|
|
proto_tree_add_item(tree, hf_value, tvb, offset, len, ENC_ASCII|ENC_NA);
|
|
proto_item_append_text(proto_tree_get_parent(tree), " '%s'", tvb_format_text(wmem_packet_scope(), tvb, offset, len));
|
|
}
|
|
}
|
|
|
|
static void
|
|
dissect_q931_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree,
|
|
gboolean is_over_ip)
|
|
{
|
|
int offset = 0;
|
|
proto_tree *q931_tree = NULL;
|
|
proto_tree *ie_tree = NULL;
|
|
proto_item *ti;
|
|
guint8 prot_discr;
|
|
guint8 call_ref_len;
|
|
guint8 call_ref[16];
|
|
guint32 call_ref_val;
|
|
guint8 message_type, segmented_message_type;
|
|
guint8 info_element;
|
|
guint16 info_element_len;
|
|
gboolean first_frag, more_frags;
|
|
guint32 frag_len;
|
|
fragment_head *fd_head;
|
|
tvbuff_t *next_tvb = NULL;
|
|
q931_packet_info *q931_pi = NULL;
|
|
|
|
q931_pi=wmem_new(pinfo->pool, q931_packet_info);
|
|
|
|
/* Init struct for collecting q931_packet_info */
|
|
reset_q931_packet_info(q931_pi);
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "Q.931");
|
|
|
|
prot_discr = tvb_get_guint8(tvb, offset);
|
|
ti = proto_tree_add_item(tree, proto_q931, tvb, offset, -1, ENC_NA);
|
|
if (tree) {
|
|
q931_tree = proto_item_add_subtree(ti, ett_q931);
|
|
|
|
dissect_q931_protocol_discriminator(tvb, offset, q931_tree);
|
|
}
|
|
offset += 1;
|
|
call_ref_len = tvb_get_guint8(tvb, offset) & 0xF; /* XXX - do as a bit field? */
|
|
if (q931_tree != NULL)
|
|
proto_tree_add_uint(q931_tree, hf_q931_call_ref_len, tvb, offset, 1, call_ref_len);
|
|
offset += 1;
|
|
switch (call_ref_len) {
|
|
case 0: call_ref_val = 0; break;
|
|
case 1: call_ref_val = tvb_get_guint8(tvb, offset); break;
|
|
case 2: call_ref_val = tvb_get_ntohs(tvb, offset); break;
|
|
case 3: call_ref_val = tvb_get_ntoh24(tvb, offset); break;
|
|
default: call_ref_val = tvb_get_ntohl(tvb, offset);
|
|
}
|
|
if (call_ref_len != 0) {
|
|
tvb_memcpy(tvb, call_ref, offset, call_ref_len);
|
|
if (q931_tree != NULL) {
|
|
proto_tree_add_boolean(q931_tree, hf_q931_call_ref_flag,
|
|
tvb, offset, 1, (call_ref[0] & 0x80) != 0);
|
|
call_ref[0] &= 0x7F;
|
|
proto_tree_add_bytes(q931_tree, hf_q931_call_ref,
|
|
tvb, offset, call_ref_len, call_ref);
|
|
} else
|
|
{ /* info for the tap */
|
|
call_ref[0] &= 0x7F;
|
|
}
|
|
/* XXX - Should crv be something besides a guint32? */
|
|
memcpy(&(q931_pi->crv), call_ref, call_ref_len > sizeof(q931_pi->crv) ? sizeof(q931_pi->crv) : call_ref_len );
|
|
offset += call_ref_len;
|
|
}
|
|
message_type = tvb_get_guint8(tvb, offset);
|
|
q931_pi->message_type = message_type;
|
|
col_add_str(pinfo->cinfo, COL_INFO, get_message_name(prot_discr, message_type));
|
|
|
|
if (prot_discr == NLPID_DMS)
|
|
proto_tree_add_item(q931_tree, hf_q931_maintenance_message_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
else
|
|
proto_tree_add_item(q931_tree, hf_q931_message_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
|
|
offset += 1;
|
|
|
|
/*
|
|
* And now for the information elements....
|
|
*/
|
|
if ((message_type != Q931_SEGMENT) || !q931_reassembly ||
|
|
(tvb_reported_length_remaining(tvb, offset) <= 4)) {
|
|
dissect_q931_IEs(tvb, pinfo, tree, q931_tree, is_over_ip, offset, 0, q931_pi);
|
|
return;
|
|
}
|
|
info_element = tvb_get_guint8(tvb, offset);
|
|
info_element_len = tvb_get_guint8(tvb, offset + 1);
|
|
if ((info_element != Q931_IE_SEGMENTED_MESSAGE) || (info_element_len < 2)) {
|
|
dissect_q931_IEs(tvb, pinfo, tree, q931_tree, is_over_ip, offset, 0, q931_pi);
|
|
return;
|
|
}
|
|
/* Segmented message IE */
|
|
ie_tree = proto_tree_add_subtree(q931_tree, tvb, offset, 1+1+info_element_len, ett_q931_ie[info_element], NULL,
|
|
val_to_str(info_element, q931_info_element_vals[0], "Unknown information element (0x%02X)"));
|
|
proto_tree_add_uint_format_value(ie_tree, hf_q931_information_element, tvb, offset, 1, info_element,
|
|
"%s", val_to_str(info_element, q931_info_element_vals[0], "Unknown (0x%02X)"));
|
|
proto_tree_add_item(ie_tree, hf_q931_information_element_len, tvb, offset + 1, 1, ENC_NA);
|
|
dissect_q931_segmented_message_ie(tvb, pinfo, offset + 2, info_element_len, ie_tree, ti);
|
|
first_frag = (tvb_get_guint8(tvb, offset + 2) & 0x80) != 0;
|
|
more_frags = (tvb_get_guint8(tvb, offset + 2) & 0x7F) != 0;
|
|
segmented_message_type = tvb_get_guint8(tvb, offset + 3);
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " of %s",
|
|
val_to_str_ext(segmented_message_type, &q931_message_type_vals_ext, "Unknown message type (0x%02X)"));
|
|
|
|
offset += 1 + 1 + info_element_len;
|
|
/* Reassembly */
|
|
frag_len = tvb_reported_length_remaining(tvb, offset);
|
|
if (first_frag && fragment_get(&q931_reassembly_table, pinfo, call_ref_val, NULL)) {
|
|
/* there are some unreassembled segments, ignore them */
|
|
fragment_end_seq_next(&q931_reassembly_table, pinfo, call_ref_val, NULL);
|
|
}
|
|
fd_head = fragment_add_seq_next(&q931_reassembly_table,
|
|
tvb, offset, pinfo, call_ref_val, NULL,
|
|
frag_len, more_frags);
|
|
if (fd_head) {
|
|
if (pinfo->num == fd_head->reassembled_in) { /* last fragment */
|
|
if (fd_head->next != NULL) { /* 2 or more segments */
|
|
next_tvb = tvb_new_chain(tvb, fd_head->tvb_data);
|
|
add_new_data_source(pinfo, next_tvb, "Reassembled Q.931 IEs");
|
|
/* Show all fragments. */
|
|
if (tree) {
|
|
proto_item *frag_tree_item;
|
|
show_fragment_seq_tree(fd_head, &q931_frag_items, q931_tree, pinfo, next_tvb, &frag_tree_item);
|
|
}
|
|
} else { /* only 1 segment */
|
|
next_tvb = tvb_new_subset_remaining(tvb, offset);
|
|
}
|
|
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "%s [reassembled]",
|
|
val_to_str_ext(segmented_message_type, &q931_message_type_vals_ext, "Unknown message type (0x%02X)"));
|
|
|
|
} else {
|
|
if (tree) proto_tree_add_uint(q931_tree, hf_q931_reassembled_in, tvb, offset, frag_len, fd_head->reassembled_in);
|
|
}
|
|
}
|
|
if (next_tvb)
|
|
dissect_q931_IEs(next_tvb, pinfo, tree, q931_tree, is_over_ip, 0, 0, q931_pi);
|
|
}
|
|
|
|
static const value_string q931_codeset_vals[] = {
|
|
{ 0x00, "Q.931 information elements" },
|
|
{ 0x04, "Information elements for ISO/IEC use" },
|
|
{ 0x05, "Information elements for national use" },
|
|
{ 0x06, "Information elements specific to the local network" },
|
|
{ 0x07, "User-specific information elements" },
|
|
{ 0x00, NULL },
|
|
};
|
|
|
|
static void
|
|
dissect_q931_IEs(tvbuff_t *tvb, packet_info *pinfo, proto_tree *root_tree,
|
|
proto_tree *q931_tree, gboolean is_over_ip, int offset, int initial_codeset,
|
|
q931_packet_info *q931_pi)
|
|
{
|
|
proto_item *ti;
|
|
proto_tree *ie_tree = NULL;
|
|
guint8 info_element;
|
|
guint8 dummy;
|
|
guint16 info_element_len;
|
|
int codeset, locked_codeset;
|
|
gboolean non_locking_shift, first_segment;
|
|
tvbuff_t *h225_tvb, *next_tvb;
|
|
e164_info_t e164_info;
|
|
e164_info.e164_number_type = NONE;
|
|
e164_info.nature_of_address = NONE;
|
|
e164_info.E164_number_str = "";
|
|
e164_info.E164_number_length = NONE;
|
|
|
|
codeset = locked_codeset = initial_codeset;
|
|
first_segment = FALSE;
|
|
while (tvb_reported_length_remaining(tvb, offset) > 0) {
|
|
info_element = tvb_get_guint8(tvb, offset);
|
|
|
|
/* Check for the codeset shift */
|
|
if ((info_element & Q931_IE_SO_MASK) &&
|
|
((info_element & Q931_IE_SO_IDENTIFIER_MASK) == Q931_IE_SHIFT)) {
|
|
non_locking_shift = info_element & Q931_IE_SHIFT_NON_LOCKING;
|
|
codeset = info_element & Q931_IE_SHIFT_CODESET;
|
|
if (!non_locking_shift)
|
|
locked_codeset = codeset;
|
|
if (q931_tree != NULL) {
|
|
proto_tree_add_uint_format(q931_tree, hf_q931_locking_codeset, tvb, offset, 1,
|
|
codeset, "%s shift to codeset %u: %s",
|
|
(non_locking_shift ? "Non-locking" : "Locking"),
|
|
codeset, val_to_str(codeset, q931_codeset_vals,
|
|
"Unknown (0x%02X)"));
|
|
}
|
|
offset += 1;
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Check for the single-octet IEs.
|
|
*/
|
|
if (info_element & Q931_IE_SO_MASK) {
|
|
/*
|
|
* Check for subdissectors for this IE or
|
|
* for all IEs in this codeset.
|
|
*/
|
|
if (dissector_get_uint_handle(codeset_dissector_table, codeset) ||
|
|
dissector_get_uint_handle(ie_dissector_table, (codeset << 8) | (info_element & Q931_IE_SO_IDENTIFIER_MASK))) {
|
|
next_tvb = tvb_new_subset_length (tvb, offset, 1);
|
|
if (dissector_try_uint(ie_dissector_table, (codeset << 8) | (info_element & Q931_IE_SO_IDENTIFIER_MASK), next_tvb, pinfo, q931_tree) ||
|
|
dissector_try_uint(codeset_dissector_table, codeset, next_tvb, pinfo, q931_tree)) {
|
|
offset += 1;
|
|
codeset = locked_codeset;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
switch ((codeset << 8) | (info_element & Q931_IE_SO_IDENTIFIER_MASK)) {
|
|
|
|
case CS0 | Q931_IE_MORE_DATA_OR_SEND_COMP:
|
|
switch (info_element) {
|
|
|
|
case Q931_IE_MORE_DATA:
|
|
proto_tree_add_item(q931_tree, hf_q931_more_data, tvb, offset, 1, ENC_NA);
|
|
break;
|
|
|
|
case Q931_IE_SENDING_COMPLETE:
|
|
proto_tree_add_item(q931_tree, hf_q931_sending_complete, tvb, offset, 1, ENC_NA);
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_expert_format(q931_tree, pinfo, &ei_q931_information_element, tvb, offset, 1,
|
|
"Unknown information element (0x%02X)", info_element);
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case CS0 | Q931_IE_CONGESTION_LEVEL:
|
|
proto_tree_add_item(q931_tree, hf_q931_congestion_level, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
case CS0 | Q931_IE_REPEAT_INDICATOR:
|
|
proto_tree_add_item(q931_tree, hf_q931_repeat_indicator, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
break;
|
|
|
|
default:
|
|
proto_tree_add_expert_format(q931_tree, pinfo, &ei_q931_information_element, tvb, offset, 1,
|
|
"Unknown information element (0x%02X)", info_element);
|
|
break;
|
|
}
|
|
offset += 1;
|
|
codeset = locked_codeset;
|
|
continue;
|
|
}
|
|
|
|
/*
|
|
* Variable-length IE.
|
|
*
|
|
* According to page 18 from Recommendation H.225.0 :
|
|
* " Length of user-user contents contents
|
|
* - Shall be 2 octets instead of 1 (as in Figure 4-36/Q.931)"
|
|
*
|
|
* We assume that if this is Q.931-over-TPKT, it might
|
|
* be H.225 traffic, and check for the IE being a user-user
|
|
* IE with ASN.1 encoding of the user information.
|
|
*/
|
|
if (is_over_ip && tvb_bytes_exist(tvb, offset, 4) &&
|
|
codeset == 0 && tvb_get_guint8(tvb, offset) == Q931_IE_USER_USER &&
|
|
tvb_get_guint8(tvb, offset + 3) == Q931_PROTOCOL_DISCRIMINATOR_ASN1) {
|
|
info_element_len = tvb_get_ntohs(tvb, offset + 1);
|
|
if (q931_tree != NULL) {
|
|
ie_tree = proto_tree_add_subtree(q931_tree, tvb, offset,
|
|
1+2+info_element_len, ett_q931_ie[info_element], NULL,
|
|
val_to_str(info_element,
|
|
q931_info_element_vals[codeset],
|
|
"Unknown information element (0x%02X)"));
|
|
proto_tree_add_uint_format_value(ie_tree, hf_q931_information_element, tvb, offset, 1, info_element, "%s", val_to_str(info_element,
|
|
q931_info_element_vals[codeset], "Unknown (0x%02X)"));
|
|
proto_tree_add_item(ie_tree, hf_q931_information_element_len, tvb, offset + 1, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(ie_tree, hf_q931_user_protocol_discriminator, tvb, offset + 3, 1, ENC_NA);
|
|
}
|
|
|
|
if (info_element_len > 1) {
|
|
/*
|
|
* If we don't desegment limit the length
|
|
* to the actual size in the frame
|
|
*/
|
|
if (!pinfo->can_desegment) {
|
|
info_element_len = MIN(info_element_len, tvb_captured_length_remaining(tvb, offset + 3));
|
|
}
|
|
/*
|
|
* Do we have a handle for the H.225
|
|
* dissector?
|
|
*/
|
|
if (h225_handle != NULL) {
|
|
/*
|
|
* Yes - call it, regardless of
|
|
* whether we're building a
|
|
* protocol tree or not.
|
|
*/
|
|
h225_tvb = tvb_new_subset_length(tvb,
|
|
offset + 4, info_element_len - 1);
|
|
call_dissector(h225_handle, h225_tvb,
|
|
pinfo, root_tree);
|
|
} else {
|
|
/*
|
|
* No - just show it as "User
|
|
* information" (if "ie_tree" is
|
|
* null, this won't add anything).
|
|
*/
|
|
proto_tree_add_item(ie_tree, hf_q931_user_information_bytes, tvb, offset + 4, info_element_len - 1, ENC_NA);
|
|
}
|
|
}
|
|
offset += 1 + 2 + info_element_len;
|
|
} else {
|
|
info_element_len = tvb_get_guint8(tvb, offset + 1);
|
|
|
|
if (first_segment && (tvb_reported_length_remaining(tvb, offset + 2) < info_element_len)) { /* incomplete IE at the end of the 1st segment */
|
|
proto_tree_add_expert(q931_tree, pinfo, &ei_q931_incomplete_ie, tvb, offset, -1);
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Check for subdissectors for this IE or
|
|
* for all IEs in this codeset.
|
|
*/
|
|
if (dissector_get_uint_handle(codeset_dissector_table, codeset) ||
|
|
dissector_get_uint_handle(ie_dissector_table, (codeset << 8) | info_element)) {
|
|
next_tvb = tvb_new_subset_length (tvb, offset, info_element_len + 2);
|
|
if (dissector_try_uint(ie_dissector_table, (codeset << 8) | info_element, next_tvb, pinfo, q931_tree) ||
|
|
dissector_try_uint(codeset_dissector_table, codeset, next_tvb, pinfo, q931_tree)) {
|
|
offset += 2 + info_element_len;
|
|
codeset = locked_codeset;
|
|
continue;
|
|
}
|
|
}
|
|
|
|
ie_tree = proto_tree_add_subtree(q931_tree, tvb, offset, 1+1+info_element_len, ett_q931_ie[info_element], &ti,
|
|
val_to_str(info_element, q931_info_element_vals[codeset], "Unknown information element (0x%02X)"));
|
|
proto_tree_add_uint_format_value(ie_tree, hf_q931_information_element, tvb, offset, 1, info_element, "%s",
|
|
val_to_str(info_element, q931_info_element_vals[codeset], "Unknown (0x%02X)"));
|
|
proto_tree_add_uint(ie_tree, hf_q931_information_element_len, tvb, offset + 1, 1, info_element_len);
|
|
|
|
if (((codeset << 8) | info_element) == (CS0 | Q931_IE_SEGMENTED_MESSAGE)) {
|
|
dissect_q931_segmented_message_ie(tvb, pinfo, offset + 2, info_element_len, ie_tree, ti);
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " of %s",
|
|
val_to_str_ext(tvb_get_guint8(tvb, offset + 3), &q931_message_type_vals_ext, "Unknown message type (0x%02X)"));
|
|
|
|
if (tvb_get_guint8(tvb, offset + 2) & 0x80) { /* the 1st segment */
|
|
first_segment = TRUE;
|
|
} else { /* not the 1st segment */
|
|
proto_tree_add_item(q931_tree, hf_q931_message_segment, tvb, offset + 4, -1, ENC_NA);
|
|
info_element_len += tvb_reported_length_remaining(tvb, offset + 4);
|
|
}
|
|
} else {
|
|
/*
|
|
* For the calling number, called number,
|
|
* and release cause IEs, don't check
|
|
* for the tree being null, as
|
|
* the dissectors for those IEs also
|
|
* supply information for the tap used
|
|
* in VoIP calls.
|
|
*/
|
|
switch ((codeset << 8) | info_element) {
|
|
|
|
case CS0 | Q931_IE_BEARER_CAPABILITY:
|
|
case CS0 | Q931_IE_LOW_LAYER_COMPAT:
|
|
if (q931_tree != NULL) {
|
|
dissect_q931_bearer_capability_ie(tvb,
|
|
offset + 2, info_element_len,
|
|
ie_tree);
|
|
}
|
|
break;
|
|
|
|
case CS0 | Q931_IE_CAUSE:
|
|
dissect_q931_cause_ie_with_info(tvb,
|
|
offset + 2, info_element_len,
|
|
ie_tree,
|
|
hf_q931_cause_value, &dummy, q931_info_element_vals0, q931_pi);
|
|
break;
|
|
|
|
case CS0 | Q931_IE_CHANGE_STATUS:
|
|
if (q931_tree != NULL) {
|
|
dissect_q931_change_status_ie(tvb,
|
|
offset + 2, info_element_len,
|
|
ie_tree);
|
|
}
|
|
break;
|
|
|
|
case CS0 | Q931_IE_CALL_STATE:
|
|
if (q931_tree != NULL) {
|
|
dissect_q931_call_state_ie(tvb,
|
|
offset + 2, info_element_len,
|
|
ie_tree);
|
|
}
|
|
break;
|
|
|
|
case CS0 | Q931_IE_CHANNEL_IDENTIFICATION:
|
|
if (q931_tree != NULL) {
|
|
dissect_q931_channel_identification_ie(
|
|
tvb, offset + 2, info_element_len,
|
|
ie_tree);
|
|
}
|
|
break;
|
|
|
|
case CS0 | Q931_IE_PROGRESS_INDICATOR:
|
|
if (q931_tree != NULL) {
|
|
dissect_q931_progress_indicator_ie(tvb,
|
|
offset + 2, info_element_len,
|
|
ie_tree);
|
|
}
|
|
break;
|
|
|
|
case CS0 | Q931_IE_NETWORK_SPECIFIC_FACIL:
|
|
case CS0 | Q931_IE_TRANSIT_NETWORK_SEL:
|
|
if (q931_tree != NULL) {
|
|
dissect_q931_ns_facilities_ie(tvb,
|
|
offset + 2, info_element_len,
|
|
ie_tree);
|
|
}
|
|
break;
|
|
|
|
case CS0 | Q931_IE_NOTIFICATION_INDICATOR:
|
|
if (q931_tree != NULL) {
|
|
dissect_q931_notification_indicator_ie(
|
|
tvb, offset + 2, info_element_len,
|
|
ie_tree);
|
|
}
|
|
break;
|
|
|
|
case CS0 | Q931_IE_DISPLAY:
|
|
if (q931_tree != NULL) {
|
|
dissect_q931_ia5_ie(tvb, offset + 2, info_element_len, ie_tree, hf_q931_display_information);
|
|
}
|
|
break;
|
|
|
|
case CS0 | Q931_IE_DATE_TIME:
|
|
dissect_q931_date_time_ie(tvb, pinfo,
|
|
offset + 2, info_element_len,
|
|
ie_tree);
|
|
break;
|
|
|
|
case CS0 | Q931_IE_KEYPAD_FACILITY:
|
|
if (q931_tree != NULL) {
|
|
dissect_q931_ia5_ie(tvb, offset + 2, info_element_len, ie_tree, hf_q931_keypad_facility);
|
|
}
|
|
break;
|
|
|
|
case CS0 | Q931_IE_SIGNAL:
|
|
dissect_q931_signal_ie(tvb, pinfo,
|
|
offset + 2, info_element_len,
|
|
ie_tree, ti);
|
|
break;
|
|
|
|
case CS0 | Q931_IE_INFORMATION_RATE:
|
|
dissect_q931_information_rate_ie(tvb, pinfo,
|
|
offset + 2, info_element_len,
|
|
ie_tree, ti);
|
|
break;
|
|
|
|
case CS0 | Q931_IE_E2E_TRANSIT_DELAY:
|
|
dissect_q931_e2e_transit_delay_ie(tvb, pinfo,
|
|
offset + 2, info_element_len,
|
|
ie_tree, ti);
|
|
break;
|
|
|
|
case CS0 | Q931_IE_TD_SELECTION_AND_INT:
|
|
dissect_q931_td_selection_and_int_ie(
|
|
tvb, pinfo, offset + 2, info_element_len,
|
|
ie_tree, ti);
|
|
break;
|
|
|
|
case CS0 | Q931_IE_PL_BINARY_PARAMETERS:
|
|
if (q931_tree != NULL) {
|
|
dissect_q931_pl_binary_parameters_ie(
|
|
tvb, offset + 2, info_element_len,
|
|
ie_tree);
|
|
}
|
|
break;
|
|
|
|
case CS0 | Q931_IE_PL_WINDOW_SIZE:
|
|
if (q931_tree != NULL) {
|
|
dissect_q931_pl_window_size_ie(tvb,
|
|
offset + 2, info_element_len,
|
|
ie_tree);
|
|
}
|
|
break;
|
|
|
|
case CS0 | Q931_IE_PACKET_SIZE:
|
|
if (q931_tree != NULL) {
|
|
dissect_q931_packet_size_ie(tvb,
|
|
offset + 2, info_element_len,
|
|
ie_tree);
|
|
}
|
|
break;
|
|
|
|
case CS0 | Q931_IE_CUG:
|
|
if (q931_tree != NULL) {
|
|
dissect_q931_cug_ie(tvb,
|
|
offset + 2, info_element_len,
|
|
ie_tree);
|
|
}
|
|
break;
|
|
|
|
case CS0 | Q931_IE_REVERSE_CHARGE_IND:
|
|
if (q931_tree != NULL) {
|
|
dissect_q931_reverse_charge_ind_ie(tvb,
|
|
offset + 2, info_element_len,
|
|
ie_tree);
|
|
}
|
|
break;
|
|
|
|
case CS0 | Q931_IE_CONNECTED_NUMBER_DEFAULT:
|
|
if (q931_tree != NULL) {
|
|
dissect_q931_number_ie(pinfo, tvb,
|
|
offset + 2, info_element_len,
|
|
ie_tree,
|
|
hf_q931_connected_number, e164_info, q931_pi);
|
|
}
|
|
break;
|
|
|
|
|
|
case CS0 | Q931_IE_CALLING_PARTY_NUMBER:
|
|
e164_info.e164_number_type = CALLING_PARTY_NUMBER;
|
|
dissect_q931_number_ie(pinfo, tvb,
|
|
offset + 2, info_element_len,
|
|
ie_tree,
|
|
hf_q931_calling_party_number, e164_info, q931_pi);
|
|
break;
|
|
|
|
case CS0 | Q931_IE_CALLED_PARTY_NUMBER:
|
|
e164_info.e164_number_type = CALLED_PARTY_NUMBER;
|
|
dissect_q931_number_ie(pinfo, tvb,
|
|
offset + 2, info_element_len,
|
|
ie_tree,
|
|
hf_q931_called_party_number, e164_info, q931_pi);
|
|
break;
|
|
|
|
case CS0 | Q931_IE_CALLING_PARTY_SUBADDR:
|
|
case CS0 | Q931_IE_CALLED_PARTY_SUBADDR:
|
|
if (q931_tree != NULL) {
|
|
dissect_q931_party_subaddr_ie(tvb,
|
|
offset + 2, info_element_len,
|
|
ie_tree);
|
|
}
|
|
break;
|
|
|
|
case CS0 | Q931_IE_REDIRECTING_NUMBER:
|
|
if (q931_tree != NULL) {
|
|
dissect_q931_number_ie(pinfo, tvb,
|
|
offset + 2, info_element_len,
|
|
ie_tree,
|
|
hf_q931_redirecting_number, e164_info, q931_pi);
|
|
}
|
|
break;
|
|
|
|
case CS0 | Q931_IE_RESTART_INDICATOR:
|
|
dissect_q931_restart_indicator_ie(tvb, pinfo,
|
|
offset + 2, info_element_len,
|
|
ie_tree, ti);
|
|
break;
|
|
|
|
case CS0 | Q931_IE_HIGH_LAYER_COMPAT:
|
|
if (q931_tree != NULL) {
|
|
dissect_q931_high_layer_compat_ie(tvb,
|
|
offset + 2, info_element_len,
|
|
ie_tree);
|
|
}
|
|
break;
|
|
|
|
case CS0 | Q931_IE_USER_USER:
|
|
if (q931_tree != NULL) {
|
|
dissect_q931_user_user_ie(tvb, pinfo,
|
|
offset + 2, info_element_len,
|
|
ie_tree);
|
|
}
|
|
break;
|
|
|
|
case CS5 | Q931_IE_PARTY_CATEGORY:
|
|
if (q931_tree != NULL) {
|
|
dissect_q931_party_category_ie(tvb,
|
|
offset + 2, info_element_len,
|
|
ie_tree);
|
|
}
|
|
break;
|
|
|
|
case CS6 | Q931_IE_DISPLAY:
|
|
if (q931_tree != NULL) {
|
|
dissect_q931_ia5_ie(tvb, offset + 2, info_element_len, ie_tree, hf_q931_avaya_display);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
if (q931_tree != NULL) {
|
|
proto_tree_add_item(ie_tree, hf_q931_data, tvb,
|
|
offset + 2, info_element_len, ENC_NA);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
offset += 1 + 1 + info_element_len;
|
|
}
|
|
codeset = locked_codeset;
|
|
}
|
|
if (q931_pi) {
|
|
tap_queue_packet(q931_tap, pinfo, q931_pi);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Q.931-over-TPKT-over-TCP.
|
|
*/
|
|
static gboolean
|
|
dissect_q931_tpkt_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
|
|
{
|
|
int lv_tpkt_len;
|
|
|
|
/*
|
|
* Check whether this looks like a TPKT-encapsulated
|
|
* Q.931 packet.
|
|
*
|
|
* The minimum length of a Q.931 message is 3:
|
|
* 1 byte for the protocol discriminator,
|
|
* 1 for the call_reference length,
|
|
* and one for the message type.
|
|
*/
|
|
lv_tpkt_len = is_tpkt(tvb, 3);
|
|
if (lv_tpkt_len == -1) {
|
|
/*
|
|
* It's not a TPKT packet; reject it.
|
|
*/
|
|
return FALSE;
|
|
}
|
|
|
|
/*
|
|
* If this segment is *exactly* the length of a TPKT header,
|
|
* we assume that, as it looks like a TPKT header, it
|
|
* is one, and that the code put a TPKT header in one
|
|
* segment and the rest of the PDU in another.
|
|
*/
|
|
if (tvb_reported_length(tvb) == 4) {
|
|
/*
|
|
* It is - call the "dissect TPKT over a TCP stream"
|
|
* routine.
|
|
*/
|
|
dissect_tpkt_encap(tvb, pinfo, tree, q931_desegment,
|
|
q931_tpkt_pdu_handle);
|
|
return TRUE;
|
|
}
|
|
|
|
/*
|
|
* Well, we have more data than just the TPKT header;
|
|
* check whether it looks like the beginning of a
|
|
* Q.931 message.
|
|
*
|
|
* The minimum length of a Q.931 message is 3, as per the
|
|
* above.
|
|
*
|
|
* Check that we have that many bytes past the TPKT header in
|
|
* the tvbuff; we already know that the TPKT header says we
|
|
* have that many bytes (as we passed 3 as the "min_len" argument
|
|
* to "is_tpkt()").
|
|
*/
|
|
if (!tvb_bytes_exist(tvb, 4, 3))
|
|
return FALSE;
|
|
|
|
/* Check the protocol discriminator */
|
|
if ((tvb_get_guint8(tvb, 4) != NLPID_Q_931) && (tvb_get_guint8(tvb, 4) != 0x03)) {
|
|
/* Doesn't look like Q.931 inside TPKT */
|
|
return FALSE;
|
|
}
|
|
|
|
/*
|
|
* OK, it looks like Q.931-over-TPKT.
|
|
* Call the "dissect TPKT over a TCP stream" routine.
|
|
*/
|
|
dissect_tpkt_encap(tvb, pinfo, tree, q931_desegment,
|
|
q931_tpkt_pdu_handle);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static int
|
|
dissect_q931_tpkt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
|
|
{
|
|
dissect_q931_tpkt_heur(tvb, pinfo, tree, NULL);
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
static int
|
|
dissect_q931_tpkt_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
|
|
{
|
|
dissect_q931_pdu(tvb, pinfo, tree, TRUE);
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
static int
|
|
dissect_q931(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
|
|
{
|
|
dissect_q931_pdu(tvb, pinfo, tree, FALSE);
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
static int
|
|
dissect_q931_over_ip(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
|
|
{
|
|
dissect_q931_pdu(tvb, pinfo, tree, TRUE);
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
static int
|
|
dissect_q931_ie_cs0(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
|
|
{
|
|
dissect_q931_IEs(tvb, pinfo, NULL, tree, FALSE, 0, 0, NULL);
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
static int
|
|
dissect_q931_ie_cs7(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
|
|
{
|
|
dissect_q931_IEs(tvb, pinfo, NULL, tree, FALSE, 0, 7, NULL);
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
void
|
|
proto_register_q931(void)
|
|
{
|
|
guint i;
|
|
guint last_offset;
|
|
|
|
static hf_register_info hf[] = {
|
|
{ &hf_q931_discriminator,
|
|
{ "Protocol discriminator", "q931.disc", FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_q931_call_ref_len,
|
|
{ "Call reference value length", "q931.call_ref_len", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_q931_call_ref_flag,
|
|
{ "Call reference flag", "q931.call_ref_flag", FT_BOOLEAN, BASE_NONE, TFS(&tfs_call_ref_flag), 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_q931_call_ref,
|
|
{ "Call reference value", "q931.call_ref", FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_q931_message_type,
|
|
{ "Message type", "q931.message_type", FT_UINT8, BASE_HEX|BASE_EXT_STRING, &q931_message_type_vals_ext, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_q931_maintenance_message_type,
|
|
{ "Maintenance message type", "q931.maintenance_message_type", FT_UINT8, BASE_HEX, VALS(dms_message_type_vals), 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_q931_segment_type,
|
|
{ "Segmented message type", "q931.segment_type", FT_UINT8, BASE_HEX|BASE_EXT_STRING, &q931_message_type_vals_ext, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_q931_coding_standard,
|
|
{ "Coding standard", "q931.coding_standard", FT_UINT8, BASE_HEX,
|
|
VALS(q931_coding_standard_vals), 0x60,NULL, HFILL }},
|
|
|
|
{ &hf_q931_interpretation,
|
|
{ "Interpretation", "q931.interpretation", FT_UINT8, BASE_HEX,
|
|
VALS(q931_interpretation_vals), 0x1C, NULL, HFILL}},
|
|
|
|
{ &hf_q931_pres_meth_prot_prof,
|
|
{ "Presentation method of protocol profile", "q931.presentation_method_protocol_profile", FT_UINT8, BASE_HEX,
|
|
VALS(q931_pres_meth_prot_prof_vals), 0x03, NULL, HFILL}},
|
|
|
|
{ &hf_q931_high_layer_characteristics,
|
|
{ "High layer characteristics identification", "q931.high_layer_characteristics", FT_UINT8, BASE_HEX|BASE_EXT_STRING,
|
|
&q931_high_layer_characteristics_vals_ext, 0x7f, NULL, HFILL }},
|
|
|
|
{ &hf_q931_extended_high_layer_characteristics,
|
|
{ "Extended high layer characteristics identification", "q931.extended_high_layer_characteristics", FT_UINT8, BASE_HEX|BASE_EXT_STRING,
|
|
&q931_extended_high_layer_characteristics_vals_ext, 0x7f, NULL, HFILL }},
|
|
|
|
{ &hf_q931_extended_audiovisual_characteristics,
|
|
{ "Extended audiovisual characteristics identification", "q931.extended_audiovisual_characteristics", FT_UINT8, BASE_HEX,
|
|
VALS(q931_audiovisual_characteristics_vals), 0x7f, NULL, HFILL }},
|
|
|
|
{ &hf_q931_information_transfer_capability,
|
|
{ "Information transfer capability", "q931.information_transfer_capability", FT_UINT8, BASE_HEX,
|
|
VALS(q931_information_transfer_capability_vals), 0x1f,NULL, HFILL }},
|
|
|
|
{ &hf_q931_transfer_mode,
|
|
{ "Transfer mode", "q931.transfer_mode", FT_UINT8, BASE_HEX,
|
|
VALS(q931_transfer_mode_vals), 0x60,NULL, HFILL }},
|
|
|
|
{ &hf_q931_information_transfer_rate,
|
|
{ "Information transfer rate", "q931.information_transfer_rate", FT_UINT8, BASE_HEX,
|
|
VALS(q931_information_transfer_rate_vals), 0x1f,NULL, HFILL }},
|
|
|
|
{ &hf_q931_layer_ident,
|
|
{ "Layer identification", "q931.layer_ident", FT_UINT8, BASE_HEX,
|
|
VALS(q931_bearer_capability_layer_ident_vals), 0x60, NULL, HFILL }},
|
|
|
|
{ &hf_q931_uil1,
|
|
{ "User information layer 1 protocol", "q931.uil1", FT_UINT8, BASE_HEX|BASE_EXT_STRING,
|
|
&q931_uil1_vals_ext, 0x1f,NULL, HFILL }},
|
|
|
|
{ &hf_q931_cause_location,
|
|
{ "Cause location", "q931.cause_location", FT_UINT8, BASE_DEC|BASE_EXT_STRING, &q931_cause_location_vals_ext, 0x0f,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_q931_cause_value,
|
|
{ "Cause value", "q931.cause_value", FT_UINT8, BASE_DEC|BASE_EXT_STRING, &q931_cause_code_vals_ext, 0x7f,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_q931_number_type,
|
|
{ "Number type", "q931.number_type", FT_UINT8, BASE_HEX, VALS(q931_number_type_vals), 0x70,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_q931_numbering_plan,
|
|
{ "Numbering plan", "q931.numbering_plan", FT_UINT8, BASE_HEX, VALS(q931_numbering_plan_vals), 0x0f,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_q931_screening_ind,
|
|
{ "Screening indicator", "q931.screening_ind", FT_UINT8, BASE_HEX, VALS(q931_screening_indicator_vals), 0x03,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_q931_presentation_ind,
|
|
{ "Presentation indicator", "q931.presentation_ind", FT_UINT8, BASE_HEX, VALS(q931_presentation_indicator_vals), 0x60,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_q931_extension_ind,
|
|
{ "Extension indicator", "q931.extension_ind",
|
|
FT_BOOLEAN, 8, TFS(&q931_extension_ind_value), 0x80,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_q931_extension_ind_preference,
|
|
{ "Preference", "q931.extension_ind_preference",
|
|
FT_UINT8, BASE_DEC, VALS(q931_status_preference_vals), 0x40,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_q931_extension_ind_new_status,
|
|
{ "New status", "q931.extension_ind_new_status",
|
|
FT_UINT8, BASE_DEC, VALS(q931_new_status_vals), 0x07,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_q931_calling_party_number,
|
|
{ "Calling party number digits", "q931.calling_party_number.digits", FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_q931_called_party_number,
|
|
{ "Called party number digits", "q931.called_party_number.digits", FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_q931_connected_number,
|
|
{ "Connected party number digits", "q931.connected_number.digits", FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_q931_redirecting_number,
|
|
{ "Redirecting party number digits", "q931.redirecting_number.digits", FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
/* fields for channel identification IE */
|
|
/* 0x80 is the extension bit */
|
|
|
|
{ &hf_q931_channel_interface_explicit,
|
|
{ "Interface identifier present", "q931.channel.interface_id_present", FT_BOOLEAN, 8, NULL, 0x40,
|
|
"True if the interface identifier is explicit in the following octets", HFILL }},
|
|
|
|
{ &hf_q931_channel_interface_type,
|
|
{ "Interface type", "q931.channel.interface_type", FT_BOOLEAN, 8, TFS(&tfs_interface_type), 0x20,
|
|
"Identifies the ISDN interface type", HFILL }},
|
|
|
|
/* 0x10 is spare */
|
|
|
|
{ &hf_q931_channel_exclusive,
|
|
{ "Indicated channel", "q931.channel.exclusive", FT_BOOLEAN, 8, TFS(&tfs_channel_exclusive), 0x08,
|
|
"True if only the indicated channel is acceptable", HFILL }},
|
|
|
|
{ &hf_q931_channel_dchan,
|
|
{ "D-channel indicator", "q931.channel.dchan", FT_BOOLEAN, 8, NULL, 0x04,
|
|
"True if the identified channel is the D-Channel", HFILL }},
|
|
|
|
{ &hf_q931_channel_selection_bri,
|
|
{ "Information channel selection", "q931.channel.selection", FT_UINT8, BASE_HEX, VALS(q931_basic_channel_selection_vals), 0x03,
|
|
"Identifies the information channel to be used", HFILL }},
|
|
|
|
{ &hf_q931_channel_selection_pri,
|
|
{ "Information channel selection", "q931.channel.selection", FT_UINT8, BASE_HEX, VALS(q931_not_basic_channel_selection_vals), 0x03,
|
|
"Identifies the information channel to be used", HFILL }},
|
|
|
|
{ &hf_q931_channel_map,
|
|
{ "Number/map", "q931.channel.map", FT_BOOLEAN, 8, TFS(&tfs_channel_map), 0x10,
|
|
"True if channel is indicates by channel map rather than number", HFILL }},
|
|
|
|
{ &hf_q931_channel_element_type,
|
|
{ "Element type", "q931.channel.element_type", FT_UINT8, BASE_HEX, VALS(q931_element_type_vals), 0xF,
|
|
"Type of element in the channel number/slot map octets", HFILL }},
|
|
|
|
{ &hf_q931_channel_number,
|
|
{ "Channel number", "q931.channel.number", FT_UINT8, BASE_DEC, NULL, 0x7F,
|
|
NULL, HFILL }},
|
|
|
|
/* desegmentation fields */
|
|
{ &hf_q931_segment_overlap,
|
|
{ "Segment overlap", "q931.segment.overlap", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"Fragment overlaps with other fragments", HFILL }},
|
|
|
|
{ &hf_q931_segment_overlap_conflict,
|
|
{ "Conflicting data in fragment overlap", "q931.segment.overlap.conflict", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"Overlapping fragments contained conflicting data", HFILL }},
|
|
|
|
{ &hf_q931_segment_multiple_tails,
|
|
{ "Multiple tail fragments found", "q931.segment.multipletails", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"Several tails were found when defragmenting the packet", HFILL }},
|
|
|
|
{ &hf_q931_segment_too_long_segment,
|
|
{ "Segment too long", "q931.segment.toolongfragment", FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"Segment contained data past end of packet", HFILL }},
|
|
|
|
{ &hf_q931_segment_error,
|
|
{ "Defragmentation error", "q931.segment.error", FT_FRAMENUM, BASE_NONE, NULL, 0x0,
|
|
"Defragmentation error due to illegal fragments", HFILL }},
|
|
|
|
{ &hf_q931_segment_count,
|
|
{ "Segment count", "q931.segment.count", FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL}},
|
|
|
|
{ &hf_q931_segment,
|
|
{ "Q.931 Segment", "q931.segment", FT_FRAMENUM, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_q931_segments,
|
|
{ "Q.931 Segments", "q931.segments", FT_NONE, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_q931_reassembled_in,
|
|
{ "Reassembled Q.931 in frame", "q931.reassembled_in", FT_FRAMENUM, BASE_NONE, NULL, 0x0,
|
|
"This Q.931 message is reassembled in this frame", HFILL}},
|
|
|
|
{ &hf_q931_reassembled_length,
|
|
{ "Reassembled Q.931 length", "q931.reassembled.length", FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"The total length of the reassembled payload", HFILL}},
|
|
|
|
/* Generated from convert_proto_tree_add_text.pl */
|
|
{ &hf_q931_first_segment,
|
|
{ "First segment", "q931.segment.first",
|
|
FT_UINT8, BASE_DEC|BASE_UNIT_STRING, &units_segment_remaining, 0x7F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_not_first_segment,
|
|
{ "Not first segment", "q931.segment.not_first",
|
|
FT_UINT8, BASE_DEC|BASE_UNIT_STRING, &units_segment_remaining, 0x7F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_bearer_capability_data,
|
|
{ "Data", "q931.bearer_capability.data",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_bearer_capability_rate_multiplier,
|
|
{ "Rate multiplier", "q931.bearer_capability.rate_multiplier",
|
|
FT_UINT8, BASE_DEC, NULL, 0x7f,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_bearer_capability_user_rate,
|
|
{ "User rate", "q931.bearer_capability.user_rate",
|
|
FT_UINT8, BASE_HEX|BASE_EXT_STRING, &q931_l1_user_rate_vals_ext, 0x1F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_bearer_capability_intermediate_rate,
|
|
{ "Intermediate rate", "q931.bearer_capability.intermediate_rate",
|
|
FT_UINT8, BASE_HEX, VALS(q931_l1_intermediate_rate_vals), 0x60,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_bearer_capability_stop_bits,
|
|
{ "Stop bits", "q931.bearer_capability.stop_bits",
|
|
FT_UINT8, BASE_HEX, VALS(q931_l1_stop_bits_vals), 0x60,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_bearer_capability_data_bits,
|
|
{ "Data bits", "q931.bearer_capability.data_bits",
|
|
FT_UINT8, BASE_HEX, VALS(q931_l1_data_bits_vals), 0x18,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_bearer_capability_parity,
|
|
{ "Parity", "q931.bearer_capability.parity",
|
|
FT_UINT8, BASE_HEX, VALS(q931_l1_parity_vals), 0x07,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_bearer_capability_modem_type,
|
|
{ "Modem type", "q931.bearer_capability.modem_type",
|
|
FT_UINT8, BASE_HEX|BASE_RANGE_STRING, RVALS(q931_l1_modem_type_rvals), 0x3F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_uil2,
|
|
{ "User information layer 2 protocol", "q931.uil2",
|
|
FT_UINT8, BASE_HEX|BASE_EXT_STRING, &q931_uil2_vals_ext, 0x1F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_uil2_info,
|
|
{ "User-specified layer 2 protocol information", "q931.uil2_info",
|
|
FT_UINT8, BASE_HEX, NULL, 0x7F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_bearer_capability_mode,
|
|
{ "Mode", "q931.bearer_capability.mode",
|
|
FT_UINT8, BASE_HEX, VALS(q931_mode_vals), 0x60,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_bearer_capability_window_size,
|
|
{ "Window size", "q931.bearer_capability.window_size",
|
|
FT_UINT8, BASE_DEC, NULL, 0x7F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_uil3,
|
|
{ "User information layer 3 protocol", "q931.uil3",
|
|
FT_UINT8, BASE_HEX, VALS(q931_uil3_vals), 0x1F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_bearer_capability_default_packet_size,
|
|
{ "Default packet size", "q931.bearer_capability.default_packet_size",
|
|
FT_UINT8, BASE_DEC|BASE_UNIT_STRING, &units_octet_octets, 0x0F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_bearer_capability_packet_window_size,
|
|
{ "Packet window size", "q931.bearer_capability.packet_window_size",
|
|
FT_UINT8, BASE_DEC, NULL, 0x7F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_uil3_additional,
|
|
{ "Additional layer 3 protocol information", "q931.uil3_additional",
|
|
FT_UINT16, BASE_HEX, VALS(nlpid_vals), 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_cause_data,
|
|
{ "Data", "q931.cause.data",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_cause_recommendation,
|
|
{ "Recommendation", "q931.cause.recommendation",
|
|
FT_UINT8, BASE_HEX, VALS(q931_cause_recommendation_vals), 0x7F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_cause_call_rejection_reason,
|
|
{ "Rejection reason", "q931.cause_call.rejection_reason",
|
|
FT_UINT8, BASE_HEX, VALS(q931_rejection_reason_vals), 0x7C,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_cause_call_condition,
|
|
{ "Condition", "q931.cause_call.condition",
|
|
FT_UINT8, BASE_HEX, VALS(q931_cause_condition_vals), 0x03,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_cause_call_user_specific_diagnostic,
|
|
{ "User specific diagnostic", "q931.cause_call.user_specific_diagnostic",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_cause_call_diagnostic,
|
|
{ "Diagnostic", "q931.cause_call.diagnostic",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_cause_call_message_type,
|
|
{ "Message type", "q931.cause_call.message_type",
|
|
FT_UINT8, BASE_HEX|BASE_EXT_STRING, &q931_message_type_vals_ext, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_cause_call_rec_timer,
|
|
{ "Timer", "q931.cause_call.rec_timer",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_call_state_data,
|
|
{ "Data", "q931.call_state.data",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_call_state,
|
|
{ "Call state", "q931.call_state",
|
|
FT_UINT8, BASE_HEX|BASE_EXT_STRING, &q931_call_state_vals_ext, 0x3F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_channel_interface_id,
|
|
{ "Interface ID", "q931.channel.interface_id",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_channel_data,
|
|
{ "Data", "q931.channel.data",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_channel_slot_map,
|
|
{ "Slot map", "q931.channel.slot_map",
|
|
FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_progress_indicator_data,
|
|
{ "Data", "q931.progress_indicator.data",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_progress_indicator_location,
|
|
{ "Location", "q931.progress_indicator.location",
|
|
FT_UINT8, BASE_HEX|BASE_EXT_STRING, &q931_cause_location_vals_ext, 0x0F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_progress_indicator_description,
|
|
{ "Progress description", "q931.progress_indicator.description",
|
|
FT_UINT8, BASE_HEX|BASE_EXT_STRING, &q931_progress_description_vals_ext, 0x7F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_netid_length,
|
|
{ "Network identification length", "q931.netid.length",
|
|
FT_UINT8, BASE_DEC, NULL, 0x7F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_netid_type,
|
|
{ "Type of network identification", "q931.netid.type",
|
|
FT_UINT8, BASE_HEX, VALS(q931_netid_type_vals), 0x70,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_netid_plan,
|
|
{ "Network identification plan", "q931.netid.plan",
|
|
FT_UINT8, BASE_HEX, VALS(q931_netid_plan_vals), 0x0F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_netid,
|
|
{ "Network identification", "q931.netid",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_netid_facility_specification,
|
|
{ "Network-specific facility specification", "q931.netid.facility_specification",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_notification_description,
|
|
{ "Notification description", "q931.notification_description",
|
|
FT_UINT8, BASE_HEX, VALS(q931_notification_description_vals), 0x7F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_signal,
|
|
{ "Signal", "q931.signal",
|
|
FT_UINT8, BASE_HEX|BASE_EXT_STRING, &q931_signal_vals_ext, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_information_rate_incoming,
|
|
{ "Incoming information rate", "q931.information_rate.incoming",
|
|
FT_UINT8, BASE_HEX|BASE_EXT_STRING, &q931_throughput_class_vals_ext, 0x1F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_information_rate_outgoing,
|
|
{ "Outgoing information rate", "q931.information_rate.outgoing",
|
|
FT_UINT8, BASE_HEX|BASE_EXT_STRING, &q931_throughput_class_vals_ext, 0x1F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_information_rate_minimum_incoming,
|
|
{ "Minimum incoming information rate", "q931.information_rate.minimum_incoming",
|
|
FT_UINT8, BASE_HEX|BASE_EXT_STRING, &q931_throughput_class_vals_ext, 0x1F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_information_rate_minimum_outgoing,
|
|
{ "Minimum outgoing information rate", "q931.information_rate.minimum_outgoing",
|
|
FT_UINT8, BASE_HEX|BASE_EXT_STRING, &q931_throughput_class_vals_ext, 0x1F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_fast_select,
|
|
{ "Fast select", "q931.fast_select",
|
|
FT_UINT8, BASE_HEX, VALS(q931_fast_selected_vals), 0x18,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_pl_window_size_forward_value,
|
|
{ "Forward value", "q931.pl_window_size.forward_value",
|
|
FT_UINT8, BASE_DEC, NULL, 0x7F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_pl_window_size_backward_value,
|
|
{ "Backward value", "q931.pl_window_size.backward_value",
|
|
FT_UINT8, BASE_DEC, NULL, 0x7F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_packet_size_forward_value,
|
|
{ "Forward value", "q931.packet_size.forward_value",
|
|
FT_UINT8, BASE_DEC, NULL, 0x7F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_packet_size_backward_value,
|
|
{ "Backward value", "q931.packet_size.backward_value",
|
|
FT_UINT8, BASE_DEC, NULL, 0x7F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_cug_indication,
|
|
{ "CUG indication", "q931.cug_indication",
|
|
FT_UINT8, BASE_HEX, VALS(q931_cug_indication_vals), 0x07,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_cug_index_code,
|
|
{ "CUG index code", "q931.cug_index_code",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_reverse_charging_ind,
|
|
{ "Reverse charging indication", "q931.reverse_charging_ind",
|
|
FT_UINT8, BASE_HEX, VALS(q931_reverse_charging_indication_vals), 0x07,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_extension_reason,
|
|
{ "Reason for redirection", "q931.extension.reason",
|
|
FT_UINT8, BASE_HEX, VALS(q931_redirection_reason_vals), 0x0F,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_party_subaddr_type,
|
|
{ "Type of subaddress", "q931.party_subaddr.type",
|
|
FT_UINT8, BASE_HEX, VALS(q931_subaddress_type_vals), 0x70,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_party_subaddr_odd_even_indicator,
|
|
{ "Odd/even indicator", "q931.party_subaddr.odd_even",
|
|
FT_UINT8, BASE_HEX, VALS(q931_odd_even_indicator_vals), 0x08,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_party_subaddr,
|
|
{ "Subaddress", "q931.party_subaddr",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_restart_indicator,
|
|
{ "Restart indicator", "q931.restart_indicator",
|
|
FT_UINT8, BASE_HEX, VALS(q931_restart_indicator_class_vals), 0x07,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_high_layer_compat_data,
|
|
{ "Data", "q931.high_layer_compat.data",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_user_protocol_discriminator,
|
|
{ "Protocol discriminator", "q931.user.protocol_discriminator",
|
|
FT_UINT8, BASE_HEX|BASE_EXT_STRING, &q931_protocol_discriminator_vals_ext, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_user_information_len,
|
|
{ "User information", "q931.user.len",
|
|
FT_UINT32, BASE_DEC|BASE_UNIT_STRING, &units_octet_octets, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_user_information_str,
|
|
{ "User information", "q931.user.string",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_user_information_bytes,
|
|
{ "User information", "q931.user.bytes",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_party_category,
|
|
{ "Party category", "q931.party_category",
|
|
FT_UINT8, BASE_HEX, VALS(q931_party_category_vals), 0x07,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_congestion_level,
|
|
{ "Congestion level", "q931.congestion_level",
|
|
FT_UINT8, BASE_HEX, VALS(q931_congestion_level_vals), Q931_IE_SO_IE_MASK,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_repeat_indicator,
|
|
{ "Repeat indicator", "q931.repeat_indicator",
|
|
FT_UINT8, BASE_HEX, VALS(q931_repeat_indication_vals), Q931_IE_SO_IE_MASK,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_out_band_negotiation,
|
|
{ "Out-band negotiation", "q931.out_band_negotiation",
|
|
FT_BOOLEAN, 8, TFS(&tfs_possible_not_possible), 0x40,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_layer_1,
|
|
{ "Layer 1", "q931.layer_1",
|
|
FT_BOOLEAN, 8, TFS(&tfs_asynchronous_synchronous), 0x40,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_layer_1_in_band_negotiation,
|
|
{ "Layer 1 in-band negotiation", "q931.layer_1_in_band_negotiation",
|
|
FT_BOOLEAN, 8, TFS(&tfs_possible_not_possible), 0x20,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_send_data_net_independent_clock,
|
|
{ "Send data with network independent clock", "q931.send_data_net_independent_clock",
|
|
FT_BOOLEAN, 8, TFS(&tfs_required_not_required), 0x10,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_accept_data_net_independent_clock,
|
|
{ "Accept data with network independent clock", "q931.accept_data_net_independent_clock",
|
|
FT_BOOLEAN, 8, TFS(&tfs_accepted_not_accepted), 0x08,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_send_data_flow_control,
|
|
{ "Send data with flow control mechanism", "q931.send_data_flow_control",
|
|
FT_BOOLEAN, 8, TFS(&tfs_required_not_required), 0x04,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_accept_data_flow_control,
|
|
{ "Accept data with flow control mechanism", "q931.accept_data_flow_control",
|
|
FT_BOOLEAN, 8, TFS(&tfs_accepted_not_accepted), 0x2,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_rate_adaption_header,
|
|
{ "Rate adaption header", "q931.rate_adaption_header",
|
|
FT_BOOLEAN, 8, TFS(&tfs_present_not_present), 0x40,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_multiple_frame_establishment,
|
|
{ "Multiple frame establishment", "q931.multiple_frame_establishment",
|
|
FT_BOOLEAN, 8, TFS(&tfs_supported_not_supported), 0x20,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_mode_of_operation,
|
|
{ "mode of operation", "q931.mode_of_operation",
|
|
FT_BOOLEAN, 8, TFS(&tfs_protocol_sensative_bit_transparent), 0x10,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_message_originator,
|
|
{ "Message originator", "q931.message_originator",
|
|
FT_BOOLEAN, 8, TFS(&tfs_assignor_default), 0x04,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_negotiation_is_done,
|
|
{ "Negotiation is done", "q931.negotiation_is_done",
|
|
FT_BOOLEAN, 8, TFS(&tfs_in_out_band), 0x02,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_bearer_capability_duplex,
|
|
{ "Duplex", "q931.bearer_capability.duplex",
|
|
FT_BOOLEAN, 8, TFS(&tfs_full_half), 0x40,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_network_service,
|
|
{ "Network service", "q931.network_service",
|
|
FT_BOOLEAN, 8, TFS(&tfs_user_provider), 0x80,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_extension_condition_type,
|
|
{ "Type", "q931.extension_condition_type",
|
|
FT_BOOLEAN, 8, TFS(&tfs_abnormal_normal), 0x40,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_extension_condition,
|
|
{ "Condition", "q931.extension_condition",
|
|
FT_UINT8, BASE_HEX, VALS(q931_cause_condition_vals), 0x03,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_pl_request,
|
|
{ "Request", "q931.pl_request",
|
|
FT_BOOLEAN, 8, TFS(&tfs_pl_request), 0x04,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_pl_binary_confirmation,
|
|
{ "Confirmation", "q931.pl_binary_confirmation",
|
|
FT_BOOLEAN, 8, TFS(&tfs_link_end), 0x02,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_pl_modulus,
|
|
{ "Modulus", "q931.pl_modulus",
|
|
FT_BOOLEAN, 8, TFS(&tfs_pl_modulus), 0x01,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_data,
|
|
{ "Data", "q931.data",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_information_element,
|
|
{ "Information element", "q931.information_element",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_information_element_len,
|
|
{ "Length", "q931.information_element_len",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_date_time,
|
|
{ "Date/time", "q931.date_time",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_more_data,
|
|
{ "More data", "q931.more_data",
|
|
FT_NONE, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_sending_complete,
|
|
{ "Sending complete", "q931.sending_complete",
|
|
FT_NONE, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_message_segment,
|
|
{ "Message segment", "q931.message_segment",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_missing_info_element,
|
|
{ "Missing information element", "q931.missing_info_element",
|
|
FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_insufficient_info_element,
|
|
{ "Insufficient information element", "q931.insufficient_info_element",
|
|
FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_cumulative_transit_delay,
|
|
{ "Cumulative transit delay", "q931.cumulative_transit_delay",
|
|
FT_UINT16, BASE_DEC|BASE_UNIT_STRING, &units_milliseconds, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_requested_end_to_end_transit_delay,
|
|
{ "Requested end-to-end transit delay", "q931.requested_end_to_end_transit_delay",
|
|
FT_UINT16, BASE_DEC|BASE_UNIT_STRING, &units_milliseconds, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_maximum_end_to_end_transit_delay,
|
|
{ "Maximum end-to-end transit delay", "q931.maximum_end_to_end_transit_delay",
|
|
FT_UINT16, BASE_DEC|BASE_UNIT_STRING, &units_milliseconds, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_transit_delay,
|
|
{ "Transit delay", "q931.transit_delay",
|
|
FT_UINT16, BASE_DEC|BASE_UNIT_STRING, &units_milliseconds, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_display_information,
|
|
{ "Display information", "q931.display_information",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_keypad_facility,
|
|
{ "Keypad facility", "q931.keypad_facility",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_avaya_display,
|
|
{ "Avaya Display", "q931.avaya_display",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_locking_codeset,
|
|
{ "Locking codeset", "q931.locking_codeset",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }
|
|
},
|
|
{ &hf_q931_protocol_negotiation,
|
|
{ "Protocol negotiation", "q931.protocol_negotiation",
|
|
FT_BOOLEAN, 8, TFS(&tfs_protocol_negotiation), 0x08,
|
|
NULL, HFILL }
|
|
},
|
|
};
|
|
|
|
#define NUM_INDIVIDUAL_ELEMS 3
|
|
static gint *ett[NUM_INDIVIDUAL_ELEMS + NUM_IE];
|
|
|
|
static ei_register_info ei[] = {
|
|
{ &ei_q931_invalid_length, { "q931.invalid_length", PI_MALFORMED, PI_ERROR, "Invalid length", EXPFILL }},
|
|
{ &ei_q931_date_time, { "q931.date_time.invalid", PI_MALFORMED, PI_ERROR, "Date/time: Invalid length", EXPFILL }},
|
|
{ &ei_q931_information_element, { "q931.information_element.unknown", PI_PROTOCOL, PI_WARN, "Unknown information element", EXPFILL }},
|
|
{ &ei_q931_incomplete_ie, { "q931.incomplete_ie", PI_MALFORMED, PI_ERROR, "Incomplete IE in the 1st segment", EXPFILL }},
|
|
};
|
|
|
|
module_t *q931_module;
|
|
expert_module_t* expert_q931;
|
|
|
|
ett[0] = &ett_q931;
|
|
ett[1] = &ett_q931_segments;
|
|
ett[2] = &ett_q931_segment;
|
|
|
|
last_offset = NUM_INDIVIDUAL_ELEMS;
|
|
|
|
for (i=0; i < NUM_IE; i++, last_offset++)
|
|
{
|
|
ett_q931_ie[i] = -1;
|
|
ett[last_offset] = &ett_q931_ie[i];
|
|
}
|
|
|
|
proto_q931 = proto_register_protocol("Q.931", "Q.931", "q931");
|
|
proto_register_field_array (proto_q931, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
expert_q931 = expert_register_protocol(proto_q931);
|
|
expert_register_field_array(expert_q931, ei, array_length(ei));
|
|
|
|
reassembly_table_register(&q931_reassembly_table,
|
|
&addresses_reassembly_table_functions);
|
|
|
|
q931_handle = register_dissector("q931", dissect_q931, proto_q931);
|
|
q931_tpkt_handle = register_dissector("q931.tpkt", dissect_q931_tpkt, proto_q931);
|
|
q931_tpkt_pdu_handle = create_dissector_handle(dissect_q931_tpkt_pdu,
|
|
proto_q931);
|
|
q931_over_ip_handle = register_dissector("q931.over_ip", dissect_q931_over_ip, proto_q931);
|
|
register_dissector("q931.ie", dissect_q931_ie_cs0, proto_q931);
|
|
register_dissector("q931.ie.cs7", dissect_q931_ie_cs7, proto_q931);
|
|
|
|
/* subdissector code */
|
|
codeset_dissector_table = register_dissector_table("q931.codeset", "Q.931 Codeset", proto_q931, FT_UINT8, BASE_HEX);
|
|
ie_dissector_table = register_dissector_table("q931.ie", "Q.931 IE", proto_q931, FT_UINT16, BASE_HEX);
|
|
q931_user_heur_subdissector_list = register_heur_dissector_list("q931_user", proto_q931);
|
|
|
|
q931_module = prefs_register_protocol(proto_q931, NULL);
|
|
prefs_register_bool_preference(q931_module, "desegment_h323_messages",
|
|
"Reassemble Q.931 messages spanning multiple TCP segments",
|
|
"Whether the Q.931 dissector should reassemble messages spanning multiple TCP segments."
|
|
" To use this option, you must also enable \"Allow subdissectors to reassemble TCP streams\" in the TCP protocol settings.",
|
|
&q931_desegment);
|
|
prefs_register_bool_preference(q931_module, "reassembly",
|
|
"Reassemble segmented Q.931 messages",
|
|
"Reassemble segmented Q.931 messages (Q.931 - Annex H)",
|
|
&q931_reassembly);
|
|
prefs_register_bool_preference(q931_module, "iso_iec_cause_coding",
|
|
"Decode ISO/IEC cause coding standard as ITU-T",
|
|
"Decode ISO/IEC cause coding standard as ITU-T",
|
|
&g931_iso_iec_cause);
|
|
/* Register for tapping */
|
|
q931_tap = register_tap("q931");
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_q931(void)
|
|
{
|
|
dissector_add_uint("lapd.sapi", LAPD_SAPI_Q931, q931_handle);
|
|
dissector_add_uint("sctp.ppi", H323_PAYLOAD_PROTOCOL_ID, q931_over_ip_handle);
|
|
dissector_add_uint("osinl.incl", NLPID_Q_931, q931_handle);
|
|
|
|
/*
|
|
* Attempt to get a handle for the H.225 dissector.
|
|
* If we can't, the handle we get is null, and we'll just
|
|
* dissect putatively-H.255 Call Signaling stuff as User
|
|
* Information.
|
|
*/
|
|
h225_handle = find_dissector_add_dependency("h225", proto_q931);
|
|
|
|
/*
|
|
* For H.323.
|
|
*/
|
|
heur_dissector_add("tcp", dissect_q931_tpkt_heur, "Q.931 over TPKT over TCP", "q931_tcp", proto_q931, HEURISTIC_ENABLE);
|
|
}
|
|
|
|
static void reset_q931_packet_info(q931_packet_info *pi)
|
|
{
|
|
if(pi == NULL) {
|
|
return;
|
|
}
|
|
|
|
pi->calling_number = NULL;
|
|
pi->called_number = NULL;
|
|
pi->cause_value = 0xFF;
|
|
pi->crv = -1;
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - https://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:
|
|
*/
|