/* packet-q931.c * Routines for Q.931 frame disassembly * Guy Harris * * Modified by Andreas Sikkema for possible use with H.323 * * Wireshark - Network traffic analyzer * By Gerald Combs * Copyright 1998 * * SPDX-License-Identifier: GPL-2.0-or-later */ #include "config.h" #include #include #include #include #include #include "packet-q931.h" #include "packet-e164.h" #include #include #include #include #include #include "packet-tpkt.h" /* Q.931 references: * * http://www.acacia-net.com/Clarinet/Protocol/q9313svn.htm * http://www.acacia-net.com/Clarinet/Protocol/q9311sc3.htm * http://www.acacia-net.com/Clarinet/Protocol/q9317oz7.htm * http://web.archive.org/web/20150510102424/http://www.protocols.com/pbook/isdn.htm * http://freesoft.org/CIE/Topics/126.htm * http://noc.comstar.ru/miscdocs/ascend-faq-cause-codes.html * http://www.andrews-arnold.co.uk/isdn/q931cause.html * http://www.tulatelecom.ru/staff/german/DSSHelp/MessList/InfEl/InfElList.html */ void proto_register_q931(void); void proto_reg_handoff_q931(void); static void reset_q931_packet_info(q931_packet_info *pi); static int q931_tap; static dissector_handle_t q931_handle; static dissector_handle_t q931_over_ip_handle; static int proto_q931; static int hf_q931_discriminator; static int hf_q931_coding_standard; static int hf_q931_interpretation; static int hf_q931_pres_meth_prot_prof; static int hf_q931_high_layer_characteristics; static int hf_q931_extended_high_layer_characteristics; static int hf_q931_extended_audiovisual_characteristics; static int hf_q931_information_transfer_capability; static int hf_q931_transfer_mode; static int hf_q931_information_transfer_rate; static int hf_q931_layer_ident; static int hf_q931_uil1; static int hf_q931_call_ref_len; static int hf_q931_call_ref_flag; static int hf_q931_call_ref; static int hf_q931_message_type; static int hf_q931_maintenance_message_type; static int hf_q931_segment_type; static int hf_q931_cause_location; static int hf_q931_cause_value; static int hf_q931_number_type; static int hf_q931_numbering_plan; static int hf_q931_extension_ind; static int hf_q931_extension_ind_preference; static int hf_q931_extension_ind_new_status; static int hf_q931_calling_party_number; static int hf_q931_called_party_number; static int hf_q931_connected_number; static int hf_q931_redirecting_number; static int hf_q931_screening_ind; static int hf_q931_presentation_ind; /* fields for Channel Identification IE */ static int hf_q931_channel_interface_explicit; static int hf_q931_channel_interface_type; static int hf_q931_channel_exclusive; static int hf_q931_channel_dchan; static int hf_q931_channel_selection_bri; static int hf_q931_channel_selection_pri; static int hf_q931_channel_map; static int hf_q931_channel_element_type; static int hf_q931_channel_number; static int hf_q931_segments; static int hf_q931_segment; static int hf_q931_segment_overlap; static int hf_q931_segment_overlap_conflict; static int hf_q931_segment_multiple_tails; static int hf_q931_segment_too_long_segment; static int hf_q931_segment_error; static int hf_q931_segment_count; static int hf_q931_reassembled_in; static int hf_q931_reassembled_length; /* Generated from convert_proto_tree_add_text.pl */ static int hf_q931_user_information_bytes; static int hf_q931_restart_indicator; static int hf_q931_call_state_data; static int hf_q931_first_segment; static int hf_q931_packet_size_backward_value; static int hf_q931_packet_size_forward_value; static int hf_q931_information_rate_minimum_outgoing; static int hf_q931_bearer_capability_data; static int hf_q931_uil2_info; static int hf_q931_netid_facility_specification; static int hf_q931_bearer_capability_stop_bits; static int hf_q931_netid_length; static int hf_q931_channel_data; static int hf_q931_call_state; static int hf_q931_party_subaddr_type; static int hf_q931_uil3; static int hf_q931_user_information_str; static int hf_q931_bearer_capability_user_rate; static int hf_q931_channel_slot_map; static int hf_q931_bearer_capability_modem_type; static int hf_q931_cause_data; static int hf_q931_cause_recommendation; static int hf_q931_bearer_capability_parity; static int hf_q931_cause_call_rejection_reason; static int hf_q931_party_category; static int hf_q931_progress_indicator_location; static int hf_q931_bearer_capability_packet_window_size; static int hf_q931_extension_reason; static int hf_q931_information_rate_minimum_incoming; static int hf_q931_user_protocol_discriminator; static int hf_q931_uil2; static int hf_q931_progress_indicator_description; static int hf_q931_bearer_capability_mode; static int hf_q931_not_first_segment; static int hf_q931_fast_select; static int hf_q931_netid_plan; static int hf_q931_cause_call_message_type; static int hf_q931_reverse_charging_ind; static int hf_q931_high_layer_compat_data; static int hf_q931_progress_indicator_data; static int hf_q931_pl_window_size_forward_value; static int hf_q931_cause_call_rec_timer; static int hf_q931_bearer_capability_window_size; static int hf_q931_cause_call_user_specific_diagnostic; static int hf_q931_channel_interface_id; static int hf_q931_uil3_additional; static int hf_q931_party_subaddr; static int hf_q931_bearer_capability_rate_multiplier; static int hf_q931_bearer_capability_data_bits; static int hf_q931_cug_index_code; static int hf_q931_bearer_capability_default_packet_size; static int hf_q931_notification_description; static int hf_q931_information_rate_outgoing; static int hf_q931_user_information_len; static int hf_q931_pl_window_size_backward_value; static int hf_q931_repeat_indicator; static int hf_q931_cause_call_diagnostic; static int hf_q931_netid; static int hf_q931_cause_call_condition; static int hf_q931_signal; static int hf_q931_congestion_level; static int hf_q931_bearer_capability_intermediate_rate; static int hf_q931_netid_type; static int hf_q931_information_rate_incoming; static int hf_q931_party_subaddr_odd_even_indicator; static int hf_q931_cug_indication; static int hf_q931_multiple_frame_establishment; static int hf_q931_message_originator; static int hf_q931_out_band_negotiation; static int hf_q931_negotiation_is_done; static int hf_q931_layer_1; static int hf_q931_accept_data_flow_control; static int hf_q931_mode_of_operation; static int hf_q931_extension_condition_type; static int hf_q931_pl_binary_confirmation; static int hf_q931_pl_request; static int hf_q931_pl_modulus; static int hf_q931_network_service; static int hf_q931_extension_condition; static int hf_q931_rate_adaption_header; static int hf_q931_send_data_net_independent_clock; static int hf_q931_bearer_capability_duplex; static int hf_q931_accept_data_net_independent_clock; static int hf_q931_send_data_flow_control; static int hf_q931_data; static int hf_q931_layer_1_in_band_negotiation; static int hf_q931_information_element; static int hf_q931_information_element_len; static int hf_q931_date_time; static int hf_q931_more_data; static int hf_q931_sending_complete; static int hf_q931_message_segment; static int hf_q931_missing_info_element; static int hf_q931_insufficient_info_element; static int hf_q931_cumulative_transit_delay; static int hf_q931_requested_end_to_end_transit_delay; static int hf_q931_maximum_end_to_end_transit_delay; static int hf_q931_transit_delay; static int hf_q931_display_information; static int hf_q931_keypad_facility; static int hf_q931_avaya_display; static int hf_q931_locking_codeset; static int hf_q931_protocol_negotiation; static int ett_q931; #define NUM_IE 256 static int ett_q931_ie[NUM_IE]; static int ett_q931_segments; static int ett_q931_segment; static expert_field ei_q931_invalid_length; static expert_field ei_q931_date_time; static expert_field ei_q931_information_element; static expert_field ei_q931_incomplete_ie; static const fragment_items q931_frag_items = { &ett_q931_segment, &ett_q931_segments, &hf_q931_segments, &hf_q931_segment, &hf_q931_segment_overlap, &hf_q931_segment_overlap_conflict, &hf_q931_segment_multiple_tails, &hf_q931_segment_too_long_segment, &hf_q931_segment_error, &hf_q931_segment_count, &hf_q931_reassembled_in, &hf_q931_reassembled_length, /* Reassembled data field */ NULL, "segments" }; /* Table for reassembly of fragments. */ static reassembly_table q931_reassembly_table; /* Preferences */ static bool q931_reassembly = true; static bool g931_iso_iec_cause; static dissector_table_t codeset_dissector_table; static dissector_table_t ie_dissector_table; /* desegmentation of Q.931 over TPKT over TCP */ static bool q931_desegment = true; /* Subdissectors */ static dissector_handle_t h225_handle; static dissector_handle_t q931_tpkt_handle; static dissector_handle_t q931_tpkt_pdu_handle; static heur_dissector_list_t q931_user_heur_subdissector_list; static void dissect_q931_IEs(tvbuff_t *tvb, packet_info *pinfo, proto_tree *root_tree, proto_tree *q931_tree, bool is_over_ip, int offset, int initial_codeset, q931_packet_info *q931_pi); const value_string q931_message_type_vals[] = { /* 0 */ { Q931_ESCAPE, "ESCAPE" }, /* 1 */ { Q931_ALERTING, "ALERTING" }, /* 2 */ { Q931_CALL_PROCEEDING, "CALL PROCEEDING" }, /* 3 */ { Q931_PROGRESS, "PROGRESS" }, /* 5 */ { Q931_SETUP, "SETUP" }, /* 6 */ { Q931_GROUIP_SERVICE, "GROUP SERVICE" }, /* 7 */ { Q931_CONNECT, "CONNECT" }, /* 8 */ { Q931_RESYNC_REQ, "RESYNC REQ" }, /* 9 */ { Q931_RESYNC_RESP, "RESYNC RESP" }, /* 10 */ { Q931_VERSION, "VERSION" }, /* 11 */ { Q931_GROUIP_SERVICE_ACK, "GROUP SERVICE ACK" }, /* 13 */ { Q931_SETUP_ACK, "SETUP ACKNOWLEDGE" }, /* 15 */ { Q931_CONNECT_ACK, "CONNECT ACKNOWLEDGE" }, /* 32 */ { Q931_USER_INFORMATION, "USER INFORMATION" }, /* 33 */ { Q931_SUSPEND_REJECT, "SUSPEND REJECT" }, /* 34 */ { Q931_RESUME_REJECT, "RESUME REJECT" }, /* 36 */ { Q931_HOLD, "HOLD" }, /* 37 */ { Q931_SUSPEND, "SUSPEND" }, /* 38 */ { Q931_RESUME, "RESUME" }, /* 40 */ { Q931_HOLD_ACK, "HOLD_ACKNOWLEDGE" }, /* 45 */ { Q931_SUSPEND_ACK, "SUSPEND ACKNOWLEDGE" }, /* 46 */ { Q931_RESUME_ACK, "RESUME ACKNOWLEDGE" }, /* 48 */ { Q931_HOLD_REJECT, "HOLD_REJECT" }, /* 49 */ { Q931_RETRIEVE, "RETRIEVE" }, /* 51 */ { Q931_RETRIEVE_ACK, "RETRIEVE ACKNOWLEDGE" }, /* 55 */ { Q931_RETRIEVE_REJECT, "RETRIEVE REJECT" }, /* 64 */ { Q931_DETACH, "DETACH" }, /* 69 */ { Q931_DISCONNECT, "DISCONNECT" }, /* 70 */ { Q931_RESTART, "RESTART" }, /* 72 */ { Q931_DETACH_ACKNOWLEDGE, "DETACH ACKNOWLEDGE" }, /* 77 */ { Q931_RELEASE, "RELEASE" }, /* 78 */ { Q931_RESTART_ACK, "RESTART ACKNOWLEDGE" }, /* 90 */ { Q931_RELEASE_COMPLETE, "RELEASE COMPLETE" }, /* 96 */ { Q931_SEGMENT, "SEGMENT" }, /* 98 */ { Q931_FACILITY, "FACILITY" }, /*100 */ { Q931_REGISTER, "REGISTER" }, /*106 */ { Q931_FACILITY_ACKNOWLEDGE, "FACILITY ACKNOWLEDGE" }, /*110 */ { Q931_NOTIFY, "NOTIFY" }, /*114 */ { Q931_FACILITY_REJECT, "FACILITY REJECT" }, /*117 */ { Q931_STATUS_ENQUIRY, "STATUS ENQUIRY" }, /*121 */ { Q931_CONGESTION_CONTROL, "CONGESTION CONTROL" }, /*123 */ { Q931_INFORMATION, "INFORMATION" }, /*125 */ { Q931_STATUS, "STATUS" }, { 0, NULL } }; static value_string_ext q931_message_type_vals_ext = VALUE_STRING_EXT_INIT(q931_message_type_vals); static const value_string dms_message_type_vals[] = { { DMS_SERVICE_ACKNOWLEDGE, "SERVICE ACKNOWLEDGE" }, { DMS_SERVICE, "SERVICE" }, { 0, NULL } }; /* * NOTE For call reference flag (octet 2) * Bit8 * 0 The message is sent from the side that originates the call reference * 1 The message is sent to the side that originates the call reference */ static const true_false_string tfs_call_ref_flag = { "Message sent to originating side", "Message sent from originating side" }; static const true_false_string tfs_interface_type = { "Primary rate interface", "Basic rate interface" }; static const true_false_string tfs_channel_exclusive = { "Exclusive; only the indicated channel is acceptable", "Indicated channel is preferred" }; static const true_false_string tfs_channel_map = { "Channel indicated by slot map", "Channel indicated by number" }; /* * Information elements. */ /* Shifted codeset values */ #define CS0 0x000 #define CS1 0x100 #define CS2 0x200 #define CS3 0x300 #define CS4 0x400 #define CS5 0x500 #define CS6 0x600 #define CS7 0x700 #define Q931_IE_SO_MASK 0x80 /* single-octet/variable-length mask */ /* * Single-octet IEs. */ #define Q931_IE_SO_IDENTIFIER_MASK 0xf0 /* IE identifier mask */ #define Q931_IE_SO_IDENTIFIER_SHIFT 4 /* IE identifier shift */ #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) { uint8_t 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_uint8(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[] = { { 0x00, "Not used" }, { 0x01, "8 kbit/s" }, { 0x02, "16 kbit/s" }, { 0x03, "32 kbit/s" }, { 0, NULL } }; static const value_string q931_l1_stop_bits_vals[] = { { 0x01, "1" }, { 0x02, "1.5" }, { 0x03, "2" }, { 0, NULL } }; static const value_string q931_l1_data_bits_vals[] = { { 0x1, "5" }, { 0x2, "7" }, { 0x3, "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[] = { { 0x1, "Normal mode" }, { 0x2, "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_uint8(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) { uint8_t octet; uint8_t coding_standard; uint8_t it_rate; uint8_t uil2_protocol; uint8_t uil3_protocol; uint8_t add_l3_info; if (len == 0) return; octet = tvb_get_uint8(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_uint8(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_uint8(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_uint8(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_uint8(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_uint8(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_uint8(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_uint8(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_uint8(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_uint8(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_uint8(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_uint8(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_uint8(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_uint8(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 char *get_message_name(uint8_t prot_discr, uint8_t 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, uint8_t *cause_value, const value_string *ie_vals, q931_packet_info *q931_pi) { uint8_t octet; uint8_t coding_standard; uint8_t rejection_reason; if (len == 0) return; octet = tvb_get_uint8(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_uint8(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_uint8(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_uint8(tvb, offset), "%s", val_to_str(tvb_get_uint8(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_uint8(tvb, offset), "%s", val_to_str(tvb_get_uint8(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_uint8(tvb, offset), "%s", val_to_str(tvb_get_uint8(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, uint8_t *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) { uint8_t octet; uint8_t coding_standard; if (len == 0) return; octet = tvb_get_uint8(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) { uint8_t octet; uint8_t coding_standard; if (len == 0) return; octet = tvb_get_uint8(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) { uint8_t octet2; uint32_t identifier_val = 0; int identifier_offset = offset; int identifier_len = 0; do { if (len == 0) break; octet2 = tvb_get_uint8(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_uint8(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 { uint8_t octet2; do { if (len == 0) break; octet2 = tvb_get_uint8(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) { uint8_t octet; uint8_t coding_standard; if (len == 0) return; octet = tvb_get_uint8(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[] = { { 0x0, "User specified" }, { 0x2, "National network identification" }, { 0x3, "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) { uint8_t octet; int netid_len; if (len == 0) return; octet = tvb_get_uint8(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_uint8(tvb, offset + 0), tvb_get_uint8(tvb, offset + 1), tvb_get_uint8(tvb, offset + 2), tvb_get_uint8(tvb, offset + 3), tvb_get_uint8(tvb, offset + 4), tvb_get_uint8(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_uint8(tvb, offset + 0), tvb_get_uint8(tvb, offset + 1), tvb_get_uint8(tvb, offset + 2), tvb_get_uint8(tvb, offset + 3), tvb_get_uint8(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_uint16_value(tvbuff_t *tvb, packet_info *pinfo, int offset, int len, proto_tree *tree, proto_item* item, int hf_value) { uint8_t octet; uint16_t value; int value_len; value_len = 0; octet = tvb_get_uint8(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_uint8(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_uint8(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_uint16_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_uint16_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_uint16_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_uint16_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[] = { { 0x0, "Fast select not requested" }, { 0x1, "Fast select not requested" }, { 0x2, "Fast select requested with no restriction of response" }, { 0x3, "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) { uint8_t octet; int number_plan; if (len == 0) return; octet = tvb_get_uint8(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_uint8(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[] = { { 0x0, "X.213/ISO 8348 Add.2 NSAP" }, { 0x2, "User-specified" }, { 0, NULL } }; static const value_string q931_odd_even_indicator_vals[] = { { 0x0, "Even number of address signals" }, { 0x1, "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) { uint8_t octet; uint8_t coding_standard; uint8_t pres_method; uint8_t characteristics; if (len == 0) return; octet = tvb_get_uint8(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_uint8(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_uint8(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) { uint8_t octet; tvbuff_t *next_tvb = NULL; heur_dtbl_entry_t *hdtbl_entry; if (len == 0) return; octet = tvb_get_uint8(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, packet_info *pinfo, 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(pinfo->pool, tvb, offset, len)); } } static void dissect_q931_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, bool is_over_ip) { int offset = 0; proto_tree *q931_tree = NULL; proto_tree *ie_tree = NULL; proto_item *ti; uint8_t prot_discr; uint8_t call_ref_len; uint8_t call_ref[16]; uint32_t call_ref_val; uint8_t message_type, segmented_message_type; uint8_t info_element; uint16_t info_element_len; bool first_frag, more_frags; uint32_t 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_uint8(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_uint8(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_uint8(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 uint32_t? */ 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_uint8(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_uint8(tvb, offset); info_element_len = tvb_get_uint8(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_uint8(tvb, offset + 2) & 0x80) != 0; more_frags = (tvb_get_uint8(tvb, offset + 2) & 0x7F) != 0; segmented_message_type = tvb_get_uint8(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, bool is_over_ip, int offset, int initial_codeset, q931_packet_info *q931_pi) { proto_item *ti; proto_tree *ie_tree = NULL; uint8_t info_element; uint8_t dummy; uint16_t info_element_len; int codeset, locked_codeset; bool 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_uint8(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_uint8(tvb, offset) == Q931_IE_USER_USER && tvb_get_uint8(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_uint8(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_uint8(tvb, offset + 3), &q931_message_type_vals_ext, "Unknown message type (0x%02X)")); if (tvb_get_uint8(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, pinfo, 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, pinfo, 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, pinfo, 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 bool 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_uint8(tvb, 4) != NLPID_Q_931) && (tvb_get_uint8(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) { unsigned i; unsigned 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, UNS(&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, UNS(&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, UNS(&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, UNS(&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_UINT16, 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, UNS(&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, UNS(&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, UNS(&units_milliseconds), 0x0, NULL, HFILL } }, { &hf_q931_transit_delay, { "Transit delay", "q931.transit_delay", FT_UINT16, BASE_DEC|BASE_UNIT_STRING, UNS(&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 int *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[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_with_description("q931_user", "Q.931 IE User payload", 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: */