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wireshark/epan/dissectors/packet-q933.c

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/* packet-q933.c
* Routines for Q.933 frame disassembly
* Guy Harris <guy@alum.mit.edu>
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/expert.h>
#include <epan/nlpid.h>
#include "packet-juniper.h"
void proto_register_q933(void);
void proto_reg_handoff_q933(void);
static int proto_q933 = -1;
static int hf_q933_discriminator = -1;
static int hf_q933_coding_standard = -1;
static int hf_q933_information_transfer_capability = -1;
static int hf_q933_transfer_mode = -1;
static int hf_q933_uil1 = -1;
static int hf_q933_call_ref_len = -1;
static int hf_q933_call_ref_flag = -1;
static int hf_q933_call_ref = -1;
static int hf_q933_message_type = -1;
static int hf_q933_cause_location = -1;
static int hf_q933_cause_value = -1;
static int hf_q933_number_type = -1;
static int hf_q933_numbering_plan = -1;
static int hf_q933_extension_ind = -1;
static int hf_q933_calling_party_number = -1;
static int hf_q933_called_party_number = -1;
static int hf_q933_connected_number = -1;
/* static int hf_q933_redirecting_number = -1; */
static int hf_q933_screening_ind = -1;
static int hf_q933_presentation_ind = -1;
static int hf_q933_report_type = -1;
static int hf_q933_link_verf_txseq = -1;
static int hf_q933_link_verf_rxseq = -1;
static int hf_q933_data = -1;
/* Generated from convert_proto_tree_add_text.pl */
static int hf_q933_user_information_layer_3_protocol = -1;
static int hf_q933_additional_layer_3_protocol_information = -1;
static int hf_q933_network_identification_plan = -1;
static int hf_q933_map_element_type = -1;
static int hf_q933_channel_type = -1;
static int hf_q933_channel_indicated_by = -1;
static int hf_q933_extended_audiovisual_characteristics_id = -1;
static int hf_q933_location = -1;
static int hf_q933_subaddress = -1;
static int hf_q933_type_of_network_identification = -1;
static int hf_q933_address_inclusion = -1;
static int hf_q933_odd_even_indicator = -1;
static int hf_q933_reverse_charging_indication = -1;
static int hf_q933_call_state = -1;
static int hf_q933_user_information_layer_2_protocol = -1;
static int hf_q933_packet_window_size = -1;
static int hf_q933_locking_shift_to_codeset = -1;
static int hf_q933_non_locking_shift_to_codeset = -1;
static int hf_q933_not_first_segment = -1;
static int hf_q933_user_rate = -1;
static int hf_q933_indicated_channel_required = -1;
static int hf_q933_high_layer_characteristics_identification = -1;
static int hf_q933_rejection_reason = -1;
static int hf_q933_progress_description = -1;
static int hf_q933_parity = -1;
static int hf_q933_extended_high_layer_characteristics_id = -1;
static int hf_q933_dlci = -1;
static int hf_q933_recommendation = -1;
static int hf_q933_mode = -1;
static int hf_q933_user_information_str = -1;
static int hf_q933_network_service = -1;
static int hf_q933_interface_basic = -1;
static int hf_q933_missing_information_element = -1;
static int hf_q933_information_element = -1;
static int hf_q933_condition_normal = -1;
static int hf_q933_not_channel_selection = -1;
static int hf_q933_network_identification_length = -1;
static int hf_q933_segmented_message_type = -1;
static int hf_q933_diagnostic = -1;
static int hf_q933_user_specified_layer_2_protocol_information = -1;
static int hf_q933_interface_identified = -1;
static int hf_q933_network_specific_facility_specification = -1;
static int hf_q933_data_bits = -1;
static int hf_q933_default_packet_size = -1;
static int hf_q933_insufficient_information_element = -1;
static int hf_q933_modem_type = -1;
static int hf_q933_user_information_bytes = -1;
static int hf_q933_multiple_frame_establishment = -1;
static int hf_q933_duplex = -1;
static int hf_q933_mode_of_operation = -1;
static int hf_q933_condition = -1;
static int hf_q933_status = -1;
static int hf_q933_repeat_indicator = -1;
static int hf_q933_confirmation = -1;
static int hf_q933_default_packet_size_0F = -1;
static int hf_q933_interface_identifier = -1;
static int hf_q933_stop_bits = -1;
static int hf_q933_indicated_channel_d_channel = -1;
static int hf_q933_channel_selection = -1;
static int hf_q933_user_specific_diagnostic = -1;
static int hf_q933_timer = -1;
static int hf_q933_first_segment = -1;
static int hf_q933_network_identification = -1;
static int hf_q933_out_band_negotiation = -1;
static int hf_q933_layer_1 = -1;
static int hf_q933_type_of_subaddress = -1;
static int hf_q933_protocol_discriminator = -1;
static int hf_q933_rate_adaption_header = -1;
static int hf_q933_reason_for_redirection = -1;
static int hf_q933_length = -1;
static int hf_q933_diagnostics = -1;
static int hf_q933_display_information = -1;
static int hf_q933_cumulative_transit_delay = -1;
static int hf_q933_requested_end_to_end_transit_delay = -1;
static int hf_q933_max_end_to_end_transit_delay = -1;
static int hf_q933_transit_delay = -1;
static int hf_q933_request = -1;
static gint ett_q933 = -1;
static gint ett_q933_ie = -1;
static expert_field ei_q933_invalid_length = EI_INIT;
static expert_field ei_q933_information_element = EI_INIT;
static dissector_handle_t q933_handle;
/*
* Q.933 message types.
*/
#define Q933_ESCAPE 0x00
#define Q933_ALERTING 0x01
#define Q933_CALL_PROCEEDING 0x02
#define Q933_CONNECT 0x07
#define Q933_CONNECT_ACK 0x0F
#define Q933_PROGRESS 0x03
#define Q933_SETUP 0x05
#define Q933_DISCONNECT 0x45
#define Q933_RELEASE 0x4D
#define Q933_RELEASE_COMPLETE 0x5A
#define Q933_SEGMENT 0x60
#define Q933_STATUS 0x7D
#define Q933_STATUS_ENQUIRY 0x75
static const value_string q933_message_type_vals[] = {
{ Q933_ESCAPE, "ESCAPE" },
{ Q933_ALERTING, "ALERTING" },
{ Q933_CALL_PROCEEDING, "CALL PROCEEDING" },
{ Q933_CONNECT, "CONNECT" },
{ Q933_CONNECT_ACK, "CONNECT ACKNOWLEDGE" },
{ Q933_PROGRESS, "PROGRESS" },
{ Q933_SETUP, "SETUP" },
{ Q933_DISCONNECT, "DISCONNECT" },
{ Q933_RELEASE, "RELEASE" },
{ Q933_RELEASE_COMPLETE, "RELEASE COMPLETE" },
{ Q933_SEGMENT, "SEGMENT" },
{ Q933_STATUS, "STATUS" },
{ Q933_STATUS_ENQUIRY, "STATUS ENQUIRY" },
{ 0, NULL }
};
static const true_false_string tfs_call_ref_flag = {
"Message sent to originating side",
"Message sent from originating side"
};
/*
* 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 Q933_IE_SO_MASK 0x80 /* single-octet/variable-length mask */
/*
* Single-octet IEs.
*/
#define Q933_IE_SO_IDENTIFIER_MASK 0xf0 /* IE identifier mask */
#define Q933_IE_SO_IDENTIFIER_SHIFT 4 /* IE identifier shift */
#define Q933_IE_SO_IE_MASK 0x0F /* IE mask */
#define Q933_IE_SHIFT 0x90
#define Q933_IE_SHIFT_NON_LOCKING 0x08 /* non-locking shift */
#define Q933_IE_SHIFT_CODESET 0x07 /* codeset */
#define Q933_IE_REPEAT_INDICATOR 0xD0
/*
* Variable-length IEs.
*/
#define Q933_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 q933_extension_ind_value = {
"last octet",
"information continues through the next octet",
};
/*
* Codeset 0 (default).
*/
#define Q933_IE_SEGMENTED_MESSAGE 0x00
#define Q933_IE_BEARER_CAPABILITY 0x04
#define Q933_IE_CAUSE 0x08
#define Q933_IE_CALL_STATE 0x14
#define Q933_IE_CHANNEL_IDENTIFICATION 0x18
#define Q933_IE_DLCI 0x19
#define Q933_IE_PROGRESS_INDICATOR 0x1E
#define Q933_IE_NETWORK_SPECIFIC_FACIL 0x20 /* Network Specific Facilities */
#define Q933_IE_DISPLAY 0x28
#define Q933_IE_E2E_TRANSIT_DELAY 0x42 /* End-to-end Transit Delay */
#define Q933_IE_TD_SELECTION_AND_INT 0x43 /* Transit Delay Selection and Indication */
#define Q933_IE_PL_BINARY_PARAMETERS 0x44 /* Packet layer binary parameters */
#define Q933_IE_LL_CORE_PARAMETERS 0x48 /* Link layer core parameters */
#define Q933_IE_LL_PROTOCOL_PARAMETERS 0x49 /* Link layer protocol parameters */
#define Q933_IE_REVERSE_CHARGE_IND 0x4A /* Reverse charging indication */
#define Q933_IE_CONNECTED_NUMBER 0x4C /* Connected Number */
#define Q933_IE_CONNECTED_SUBADDR 0x4D /* Connected sub-address */
#define Q933_IE_X_213_PRIORITY 0x50 /* X.213 priority */
#define Q933_IE_REPORT_TYPE 0x51
#define Q933_IE_LINK_INTEGRITY_VERF 0x53 /* Link integrity verification */
#define Q933_IE_PVC_STATUS 0x57
#define Q933_IE_CALLING_PARTY_NUMBER 0x6C /* Calling Party Number */
#define Q933_IE_CALLING_PARTY_SUBADDR 0x6D /* Calling Party Subaddress */
#define Q933_IE_CALLED_PARTY_NUMBER 0x70 /* Called Party Number */
#define Q933_IE_CALLED_PARTY_SUBADDR 0x71 /* Called Party Subaddress */
#define Q933_IE_TRANSIT_NETWORK_SEL 0x78 /* Transit Network Selection */
#define Q933_IE_LOW_LAYER_COMPAT 0x7C /* Low-Layer Compatibility */
#define Q933_IE_HIGH_LAYER_COMPAT 0x7D /* High-Layer Compatibility */
#define Q933_IE_USER_USER 0x7E /* User-User */
#define Q933_IE_ESCAPE 0x7F /* Escape for extension */
/* Codeset 0 */
static const value_string q933_info_element_vals0[] = {
{ Q933_IE_SEGMENTED_MESSAGE, "Segmented message" },
{ Q933_IE_BEARER_CAPABILITY, "Bearer capability" },
{ Q933_IE_CAUSE, "Cause" },
{ Q933_IE_CALL_STATE, "Call state" },
{ Q933_IE_CHANNEL_IDENTIFICATION, "Channel identification" },
{ Q933_IE_DLCI, "Data link connection identifier" },
{ Q933_IE_PROGRESS_INDICATOR, "Progress indicator" },
{ Q933_IE_NETWORK_SPECIFIC_FACIL, "Network specific facilities" },
{ Q933_IE_E2E_TRANSIT_DELAY, "End-to-end transit delay" },
{ Q933_IE_TD_SELECTION_AND_INT, "Transit delay selection and indication" },
{ Q933_IE_PL_BINARY_PARAMETERS, "Packet layer binary parameters" },
{ Q933_IE_LL_CORE_PARAMETERS, "Link layer core parameters" },
{ Q933_IE_LL_PROTOCOL_PARAMETERS, "Link layer protocol parameters" },
{ Q933_IE_REVERSE_CHARGE_IND, "Reverse charging indication" },
{ Q933_IE_CONNECTED_NUMBER, "Connected number" },
{ Q933_IE_CONNECTED_SUBADDR, "Connected subaddress" },
{ Q933_IE_X_213_PRIORITY, "X.213 priority" },
{ Q933_IE_REPORT_TYPE, "Report type" },
{ Q933_IE_LINK_INTEGRITY_VERF, "Link integrity verification" },
{ Q933_IE_PVC_STATUS, "PVC status" },
{ Q933_IE_CALLING_PARTY_NUMBER, "Calling party number" },
{ Q933_IE_CALLING_PARTY_SUBADDR, "Calling party subaddress" },
{ Q933_IE_CALLED_PARTY_NUMBER, "Called party number" },
{ Q933_IE_CALLED_PARTY_SUBADDR, "Called party subaddress" },
{ Q933_IE_TRANSIT_NETWORK_SEL, "Transit network selection" },
{ Q933_IE_LOW_LAYER_COMPAT, "Low-layer compatibility" },
{ Q933_IE_HIGH_LAYER_COMPAT, "High-layer compatibility" },
{ Q933_IE_USER_USER, "User-user" },
{ Q933_IE_ESCAPE, "Escape" },
{ 0, NULL }
};
/* Codeset 1 */
static const value_string q933_info_element_vals1[] = {
{ 0, NULL }
};
/* Codeset 2 */
static const value_string q933_info_element_vals2[] = {
{ 0, NULL }
};
/* Codeset 3 */
static const value_string q933_info_element_vals3[] = {
{ 0, NULL }
};
/* Codeset 4 */
static const value_string q933_info_element_vals4[] = {
{ 0, NULL }
};
/* Codeset 5 */
#define Q933_IE_ANSI_REPORT_TYPE 0x01
#define Q933_IE_ANSI_LINK_INTEGRITY_VERF 0x03
#define Q933_IE_ANSI_PVC_STATUS 0x07
/* Codeset 5 */
static const value_string q933_info_element_vals5[] = {
{ Q933_IE_ANSI_REPORT_TYPE, "Report type (ANSI)" },
{ Q933_IE_REPORT_TYPE, "Report type (CCITT)" },
{ Q933_IE_ANSI_LINK_INTEGRITY_VERF, "Keep Alive (ANSI)" },
{ Q933_IE_LINK_INTEGRITY_VERF, "Keep Alive (CCITT)" },
{ Q933_IE_ANSI_PVC_STATUS, "PVC Status (ANSI)" },
{ Q933_IE_PVC_STATUS, "PVC Status (CCITT)" },
{ 0, NULL }
};
/* Codeset 6 */
static const value_string q933_info_element_vals6[] = {
{ 0, NULL }
};
/* Codeset 7 */
static const value_string q933_info_element_vals7[] = {
{ 0, NULL }
};
/* Codeset array */
#define NUM_INFO_ELEMENT_VALS (Q933_IE_SHIFT_CODESET+1)
static const value_string *q933_info_element_vals[NUM_INFO_ELEMENT_VALS] = {
q933_info_element_vals0,
q933_info_element_vals1,
q933_info_element_vals2,
q933_info_element_vals3,
q933_info_element_vals4,
q933_info_element_vals5,
q933_info_element_vals6,
q933_info_element_vals7,
};
static const value_string q933_repeat_indication_vals[] = {
{ 0x2, "Prioritized list" },
{ 0, NULL }
};
/*
* ITU-standardized coding.
*/
#define Q933_ITU_STANDARDIZED_CODING 0x00
/*
* Dissect a Segmented message information element.
*/
static void
dissect_q933_segmented_message_ie(tvbuff_t *tvb, packet_info *pinfo, int offset, int len,
proto_tree *tree)
{
guint8 octet;
if (len != 2) {
proto_tree_add_expert_format(tree, pinfo, &ei_q933_invalid_length, tvb, offset, len, "Segmented message: length is %d, should be 2", len);
return;
}
octet = tvb_get_guint8(tvb, offset);
if (octet & 0x80) {
proto_tree_add_item(tree, hf_q933_first_segment, tvb, offset, 1, ENC_NA);
} else {
proto_tree_add_item(tree, hf_q933_not_first_segment, tvb, offset, 1, ENC_NA);
}
proto_tree_add_item(tree, hf_q933_segmented_message_type, tvb, offset + 1, 1, ENC_BIG_ENDIAN);
}
/*
* Dissect a Bearer capability or Low-layer compatibility information element.
*/
static const value_string q933_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 q933_information_transfer_capability_vals[] = {
{ 0x08, "Unrestricted digital information" },
{ 0, NULL }
};
static const value_string q933_transfer_mode_vals[] = {
{ 0x01, "Frame mode" },
{ 0, NULL }
};
static const value_string q933_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" },
{ 0, NULL },
};
static const value_string q933_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 const value_string q933_l1_stop_bits_vals[] = {
{ 0x20, "1" },
{ 0x40, "1.5" },
{ 0x60, "2" },
{ 0, NULL }
};
static const value_string q933_l1_data_bits_vals[] = {
{ 0x08, "5" },
{ 0x10, "7" },
{ 0x18, "8" },
{ 0, NULL }
};
static const value_string q933_l1_parity_vals[] = {
{ 0x00, "Odd" },
{ 0x02, "Even" },
{ 0x03, "None" },
{ 0x04, "Forced to 0" },
{ 0x05, "Forced to 1" },
{ 0, NULL }
};
#define Q933_UIL2_USER_SPEC 0x10
static const value_string q933_uil2_vals[] = {
{ 0x01, "Basic mode ISO 1745" },
{ 0x06, "X.25, link level" },
{ 0x07, "X.25 multilink" },
{ 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" },
{ Q933_UIL2_USER_SPEC, "User-specified" },
{ 0x11, "ISO 7776 DTE-DTE operation" },
{ 0, NULL }
};
static const value_string q933_address_inclusion_vals[] = {
{ 0x01, "Address included" },
{ 0x02, "Encapsulation of logical control frame" },
{ 0, NULL }
};
static const value_string q933_mode_vals[] = {
{ 0x20, "Normal mode" },
{ 0x40, "Extended mode" },
{ 0, NULL }
};
#define Q933_UIL3_X25_PL 0x06
#define Q933_UIL3_ISO_8208 0x07 /* X.25-based */
#define Q933_UIL3_X223 0x08 /* X.25-based */
#define Q933_UIL3_TR_9577 0x0B
#define Q933_UIL3_USER_SPEC 0x10
static const value_string q933_uil3_vals[] = {
{ Q933_UIL3_X25_PL, "X.25, packet layer" },
{ Q933_UIL3_ISO_8208, "ISO/IEC 8208" },
{ Q933_UIL3_X223, "X.223/ISO 8878" },
{ 0x09, "ISO/IEC 8473" },
{ 0x0A, "T.70" },
{ Q933_UIL3_TR_9577, "ISO/IEC TR 9577" },
{ Q933_UIL3_USER_SPEC, "User-specified" },
{ 0, NULL }
};
static void
dissect_q933_protocol_discriminator(tvbuff_t *tvb, int offset, proto_tree *tree)
{
unsigned int discriminator = tvb_get_guint8(tvb, offset);
if (discriminator == NLPID_Q_933) {
proto_tree_add_uint_format_value(tree, hf_q933_discriminator,
tvb, offset, 1, discriminator,
"Q.933");
} else if (discriminator == NLPID_Q_2931) {
proto_tree_add_uint_format_value(tree, hf_q933_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_q933_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_q933_discriminator,
tvb, offset, 1, discriminator,
"National use (0x%02X)",
discriminator);
} else {
proto_tree_add_uint_format_value(tree, hf_q933_discriminator,
tvb, offset, 1, discriminator,
"Reserved (0x%02X)",
discriminator);
}
}
static void
dissect_q933_bearer_capability_ie(tvbuff_t *tvb, int offset, int len,
proto_tree *tree)
{
guint8 octet;
guint8 coding_standard;
guint8 uil2_protocol;
guint8 uil3_protocol;
if (len == 0)
return;
octet = tvb_get_guint8(tvb, offset);
coding_standard = octet & 0x60;
if (coding_standard != Q933_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_q933_data, tvb, offset, len, ENC_NA);
proto_tree_add_uint(tree, hf_q933_coding_standard, tvb, offset, 1, octet);
proto_tree_add_boolean(tree, hf_q933_extension_ind, tvb, offset, 1, octet);
return;
}
proto_tree_add_uint(tree, hf_q933_information_transfer_capability, tvb, offset, 1, octet);
proto_tree_add_uint(tree, hf_q933_coding_standard, tvb, offset, 1, octet);
proto_tree_add_boolean(tree, hf_q933_extension_ind, tvb, offset, 1, octet);
offset += 1;
len -= 1;
/*
* XXX - only in Low-layer compatibility information element.
*/
if (!(octet & Q933_IE_VL_EXTENSION)) {
if (len == 0)
return;
proto_tree_add_item(tree, hf_q933_out_band_negotiation, tvb, offset, 1, ENC_NA);
offset += 1;
len -= 1;
}
if (len == 0)
return;
octet = tvb_get_guint8(tvb, offset);
proto_tree_add_uint(tree, hf_q933_transfer_mode, tvb, offset, 1, octet);
proto_tree_add_boolean(tree, hf_q933_extension_ind, tvb, offset, 1, octet);
offset += 1;
len -= 1;
if (len == 0)
return;
octet = tvb_get_guint8(tvb, offset);
if ((octet & 0x60) == 0x20) {
/*
* Layer 1 information.
*/
proto_tree_add_uint(tree, hf_q933_uil1, tvb, offset, 1, octet);
proto_tree_add_boolean(tree, hf_q933_extension_ind, tvb, offset, 1, octet);
offset += 1;
len -= 1;
if (octet & Q933_IE_VL_EXTENSION)
goto l1_done;
if (len == 0)
return;
octet = tvb_get_guint8(tvb, offset);
proto_tree_add_item(tree, hf_q933_layer_1, tvb, offset, 1, ENC_NA);
proto_tree_add_item(tree, hf_q933_user_rate, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
len -= 1;
if (octet & Q933_IE_VL_EXTENSION)
goto l1_done;
if (len == 0)
return;
octet = tvb_get_guint8(tvb, offset);
proto_tree_add_item(tree, hf_q933_rate_adaption_header, tvb, offset, 1, ENC_NA);
proto_tree_add_item(tree, hf_q933_multiple_frame_establishment, tvb, offset, 1, ENC_NA);
proto_tree_add_item(tree, hf_q933_mode_of_operation, tvb, offset, 1, ENC_NA);
offset += 1;
len -= 1;
if (octet & Q933_IE_VL_EXTENSION)
goto l1_done;
if (len == 0)
return;
octet = tvb_get_guint8(tvb, offset);
proto_tree_add_item(tree, hf_q933_stop_bits, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(tree, hf_q933_data_bits, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(tree, hf_q933_parity, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
len -= 1;
if (octet & Q933_IE_VL_EXTENSION)
goto l1_done;
if (len == 0)
return;
proto_tree_add_item(tree, hf_q933_duplex, tvb, offset, 1, ENC_NA);
proto_tree_add_item(tree, hf_q933_modem_type, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
len -= 1;
}
l1_done:
;
if (len == 0)
return;
octet = tvb_get_guint8(tvb, offset);
if ((octet & 0x60) == 0x40) {
/*
* Layer 2 information.
*/
uil2_protocol = octet & 0x1F;
proto_tree_add_item(tree, hf_q933_user_information_layer_2_protocol, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
len -= 1;
/*
* XXX - only in Low-layer compatibility information element.
*/
if (octet & Q933_IE_VL_EXTENSION)
goto l2_done;
if (len == 0)
return;
if (uil2_protocol == Q933_UIL2_USER_SPEC) {
proto_tree_add_item(tree, hf_q933_user_specified_layer_2_protocol_information, tvb, offset, 1, ENC_BIG_ENDIAN);
} else {
proto_tree_add_item(tree, hf_q933_address_inclusion, tvb, offset, 1, ENC_BIG_ENDIAN);
}
offset += 1;
len -= 1;
}
l2_done:
;
if (len == 0)
return;
octet = tvb_get_guint8(tvb, offset);
if ((octet & 0x60) == 0x60) {
/*
* Layer 3 information.
*/
uil3_protocol = octet & 0x1F;
proto_tree_add_item(tree, hf_q933_user_information_layer_3_protocol, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
len -= 1;
/*
* XXX - only in Low-layer compatibility information element.
*/
if (octet & Q933_IE_VL_EXTENSION)
goto l3_done;
if (len == 0)
return;
octet = tvb_get_guint8(tvb, offset);
switch (uil3_protocol) {
case Q933_UIL3_X25_PL:
case Q933_UIL3_ISO_8208:
case Q933_UIL3_X223:
proto_tree_add_item(tree, hf_q933_mode, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
len -= 1;
if (octet & Q933_IE_VL_EXTENSION)
goto l3_done;
if (len == 0)
return;
octet = tvb_get_guint8(tvb, offset);
proto_tree_add_item(tree, hf_q933_default_packet_size_0F, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
len -= 1;
if (octet & Q933_IE_VL_EXTENSION)
goto l3_done;
if (len == 0)
return;
proto_tree_add_item(tree, hf_q933_packet_window_size, tvb, offset, 1, ENC_BIG_ENDIAN);
/*offset += 1;*/
/*len -= 1;*/
break;
case Q933_UIL3_USER_SPEC:
proto_tree_add_uint_format_value(tree, hf_q933_default_packet_size, tvb, offset, 1,
1 << (octet & 0x0F), "%u octets", 1 << (octet & 0x0F));
/*offset += 1;*/
/*len -= 1;*/
break;
case Q933_UIL3_TR_9577:
if (octet & Q933_IE_VL_EXTENSION)
goto l3_done;
#if 0 /* XXX: len is always >0 at this point; is field always 2 bytes (if not Q933_IE_VL_EXTENSION) ? */
if (len == 0)
return;
#endif
proto_tree_add_item(tree, hf_q933_additional_layer_3_protocol_information, tvb, offset, 2, ENC_BIG_ENDIAN);
/*offset += 2;*/
/*len -= 2;*/
break;
}
}
l3_done:
;
}
/*
* Dissect a Cause information element.
*/
const value_string q933_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)" },
{ 0x07, "International network (INTL)" },
{ 0x0A, "Network beyond interworking point (BI)" },
{ 0, NULL }
};
static const value_string q933_cause_recommendation_vals[] = {
{ 0x00, "Q.933" },
{ 0x03, "X.21" },
{ 0x04, "X.25" },
{ 0x05, "Q.1031/Q.1051" },
{ 0, NULL }
};
/*
* Cause codes for Cause.
*/
#define Q933_CAUSE_UNALLOC_NUMBER 0x01
#define Q933_CAUSE_NO_ROUTE_TO_DEST 0x03
#define Q933_CAUSE_CALL_REJECTED 0x15
#define Q933_CAUSE_NUMBER_CHANGED 0x16
#define Q933_CAUSE_ACCESS_INFO_DISC 0x2B
#define Q933_CAUSE_QOS_UNAVAILABLE 0x31
#define Q933_CAUSE_CHAN_NONEXISTENT 0x52
#define Q933_CAUSE_INCOMPATIBLE_DEST 0x58
#define Q933_CAUSE_MAND_IE_MISSING 0x60
#define Q933_CAUSE_MT_NONEX_OR_UNIMPL 0x61
#define Q933_CAUSE_IE_NONEX_OR_UNIMPL 0x63
#define Q933_CAUSE_INVALID_IE_CONTENTS 0x64
#define Q933_CAUSE_MSG_INCOMPAT_W_CS 0x65
#define Q933_CAUSE_REC_TIMER_EXP 0x66
const value_string q933_cause_code_vals[] = {
{ 0x00, "Valid cause code not yet received" },
{ Q933_CAUSE_UNALLOC_NUMBER, "Unallocated (unassigned) number" },
{ 0x02, "No route to specified transit network" },
{ Q933_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" },
{ Q933_CAUSE_CALL_REJECTED, "Call rejected" },
{ Q933_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" },
{ Q933_CAUSE_ACCESS_INFO_DISC, "Access information discarded" },
{ 0x2C, "Requested circuit/channel not available" },
{ 0x2D, "Pre-empted" },
{ 0x2E, "Precedence call blocked" },
{ 0x2F, "Resources unavailable, unspecified" },
{ Q933_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" },
{ Q933_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" },
{ Q933_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" },
{ Q933_CAUSE_MAND_IE_MISSING, "Mandatory information element is missing" },
{ Q933_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" },
{ Q933_CAUSE_IE_NONEX_OR_UNIMPL,"Information element non-existent or not implemented" },
{ Q933_CAUSE_INVALID_IE_CONTENTS,"Invalid information element contents" },
{ Q933_CAUSE_MSG_INCOMPAT_W_CS, "Message not compatible with call state" },
{ Q933_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 }
};
static const value_string q933_cause_condition_vals[] = {
{ 0x00, "Unknown" },
{ 0x01, "Permanent" },
{ 0x02, "Transient" },
{ 0x00, NULL }
};
#define Q933_REJ_USER_SPECIFIC 0x00
#define Q933_REJ_IE_MISSING 0x04
#define Q933_REJ_IE_INSUFFICIENT 0x08
static const value_string q933_rejection_reason_vals[] = {
{ 0x00, "User specific" },
{ 0x04, "Information element missing" },
{ 0x08, "Information element contents are not sufficient" },
{ 0x00, NULL }
};
static void
dissect_q933_cause_ie(tvbuff_t *tvb, int offset, int len,
proto_tree *tree, int hf_cause_value)
{
guint8 octet;
guint8 cause_value;
guint8 coding_standard;
guint8 rejection_reason;
if (len == 0)
return;
octet = tvb_get_guint8(tvb, offset);
coding_standard = octet & 0x60;
if (coding_standard != Q933_ITU_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_q933_coding_standard, tvb, offset, 1, octet);
proto_tree_add_item(tree, hf_q933_data, tvb, offset, len, ENC_NA);
return;
}
proto_tree_add_uint(tree, hf_q933_cause_location, tvb, offset, 1, octet);
proto_tree_add_uint(tree, hf_q933_coding_standard, tvb, offset, 1, octet);
proto_tree_add_boolean(tree, hf_q933_extension_ind, tvb, offset, 1, octet);
offset += 1;
len -= 1;
if (!(octet & Q933_IE_VL_EXTENSION)) {
if (len == 0)
return;
octet = tvb_get_guint8(tvb, offset);
proto_tree_add_item(tree, hf_q933_recommendation, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_boolean(tree, hf_q933_extension_ind, tvb, offset, 1, octet);
offset += 1;
len -= 1;
}
if (len == 0)
return;
octet = tvb_get_guint8(tvb, offset);
cause_value = octet & 0x7F;
proto_tree_add_uint(tree, hf_cause_value, tvb, offset, 1, cause_value);
proto_tree_add_boolean(tree, hf_q933_extension_ind, tvb, offset, 1, octet);
offset += 1;
len -= 1;
if (len == 0)
return;
switch (cause_value) {
case Q933_CAUSE_UNALLOC_NUMBER:
case Q933_CAUSE_NO_ROUTE_TO_DEST:
case Q933_CAUSE_QOS_UNAVAILABLE:
proto_tree_add_item(tree, hf_q933_network_service, tvb, offset, 1, ENC_NA);
proto_tree_add_item(tree, hf_q933_condition_normal, tvb, offset, 1, ENC_NA);
proto_tree_add_item(tree, hf_q933_condition, tvb, offset, 1, ENC_BIG_ENDIAN);
break;
case Q933_CAUSE_CALL_REJECTED:
rejection_reason = octet & 0x7C;
proto_tree_add_item(tree, hf_q933_rejection_reason, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(tree, hf_q933_condition, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
len -= 1;
if (len == 0)
return;
switch (rejection_reason) {
case Q933_REJ_USER_SPECIFIC:
proto_tree_add_item(tree, hf_q933_user_specific_diagnostic, tvb, offset, len, ENC_NA);
break;
case Q933_REJ_IE_MISSING:
proto_tree_add_item(tree, hf_q933_missing_information_element, tvb, offset, 1, ENC_BIG_ENDIAN);
break;
case Q933_REJ_IE_INSUFFICIENT:
proto_tree_add_item(tree, hf_q933_insufficient_information_element, tvb, offset, 1, ENC_BIG_ENDIAN);
break;
default:
proto_tree_add_item(tree, hf_q933_diagnostic, tvb, offset, len, ENC_NA);
break;
}
break;
case Q933_CAUSE_ACCESS_INFO_DISC:
case Q933_CAUSE_INCOMPATIBLE_DEST:
case Q933_CAUSE_MAND_IE_MISSING:
case Q933_CAUSE_IE_NONEX_OR_UNIMPL:
case Q933_CAUSE_INVALID_IE_CONTENTS:
do {
proto_tree_add_item(tree, hf_q933_information_element, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
len -= 1;
} while (len != 0);
break;
case Q933_CAUSE_MT_NONEX_OR_UNIMPL:
case Q933_CAUSE_MSG_INCOMPAT_W_CS:
proto_tree_add_item(tree, hf_q933_message_type, tvb, offset, 1, ENC_BIG_ENDIAN);
break;
case Q933_CAUSE_REC_TIMER_EXP:
if (len < 3)
return;
proto_tree_add_item(tree, hf_q933_timer, tvb, offset, 3, ENC_ASCII|ENC_NA);
break;
default:
proto_tree_add_item(tree, hf_q933_diagnostics, tvb, offset, len, ENC_NA);
}
}
/*
* Dissect a Call state information element.
*/
static const value_string q933_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" },
{ 0x12, "Resume request" },
{ 0x13, "Release request" },
{ 0x16, "Call abort"},
{ 0x19, "Overlap receiving" },
{ 0x3D, "Restart request" },
{ 0x3E, "Restart" },
{ 0, NULL }
};
static void
dissect_q933_call_state_ie(tvbuff_t *tvb, int offset, int len,
proto_tree *tree)
{
guint8 octet;
guint8 coding_standard;
if (len == 0)
return;
octet = tvb_get_guint8(tvb, offset);
coding_standard = octet & 0x60;
proto_tree_add_uint(tree, hf_q933_coding_standard, tvb, offset, 1, octet);
if (coding_standard != Q933_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_q933_data, tvb, offset, len, ENC_NA);
return;
}
proto_tree_add_item(tree, hf_q933_call_state, tvb, offset, 1, ENC_BIG_ENDIAN);
}
/*
* Dissect a Report Type information element.
*/
#define Q933_IE_REPORT_TYPE_FULL_STATUS 0x00
#define Q933_IE_REPORT_TYPE_LINK_VERIFY 0x01
#define Q933_IE_REPORT_TYPE_ASYNC_PVC_STATUS 0x02
static const value_string q933_report_type_vals[] = {
{ Q933_IE_REPORT_TYPE_FULL_STATUS, "Full Status" },
{ Q933_IE_REPORT_TYPE_LINK_VERIFY, "Link verify" },
{ Q933_IE_REPORT_TYPE_ASYNC_PVC_STATUS, "Async PVC Status" },
{ 0, NULL }
};
static void
dissect_q933_report_type_ie(tvbuff_t *tvb, int offset, int len,
proto_tree *tree)
{
guint8 report_type;
if (len == 0)
return;
report_type = tvb_get_guint8(tvb, offset);
proto_tree_add_uint(tree, hf_q933_report_type, tvb, offset, 1, report_type);
}
/*
* Dissect a Link Integrity Verification information element.
*/
static void
dissect_q933_link_integrity_verf_ie(tvbuff_t *tvb, int offset, int len,
proto_tree *tree)
{
guint8 txseq,rxseq;
if (len < 2)
return;
txseq = tvb_get_guint8(tvb, offset);
rxseq = tvb_get_guint8(tvb, offset+1);
proto_tree_add_uint(tree, hf_q933_link_verf_txseq, tvb, offset, 1, txseq);
proto_tree_add_uint(tree, hf_q933_link_verf_rxseq, tvb, offset+1, 1, rxseq);
}
/*
* Dissect a PVC status information element.
*/
static const value_string q933_pvc_status_vals[] = {
{0x00, "Inactive"},
{0x01, "Active"},
{0x02, "Deleted"},
{0x04, "New"},
{0x05, "New, Active"},
{0, NULL}
};
static void
dissect_q933_pvc_status_ie(tvbuff_t *tvb, int offset, int len,
proto_tree *tree)
{
guint32 dlci;
guint8 dlci_len=2;
if (len < 3)
return;
dlci = ((tvb_get_guint8(tvb, offset) & 0x3F) << 4) |
((tvb_get_guint8(tvb, offset+1) & 0x78) >> 3);
/* first determine the DLCI field length */
if (len == 4) {
dlci = (dlci << 6) | ((tvb_get_guint8(tvb, offset+2) & 0x7E) >> 1);
dlci_len++;
} else if (len == 5) {
dlci = (dlci << 13) | (tvb_get_guint8(tvb, offset+3) & 0x7F) |
((tvb_get_guint8(tvb, offset+4) & 0x7E) >> 1);
dlci_len+=2;
}
proto_tree_add_uint(tree, hf_q933_dlci, tvb, offset, dlci_len, dlci);
proto_tree_add_item(tree, hf_q933_status, tvb, offset+dlci_len, 1, ENC_BIG_ENDIAN);
}
/*
* Dissect a Channel identification information element.
*/
#define Q933_INTERFACE_IDENTIFIED 0x40
#define Q933_NOT_BASIC_CHANNEL 0x20
static const value_string q933_basic_channel_selection_vals[] = {
{ 0x00, "No channel" },
{ 0x01, "B1 channel" },
{ 0x02, "B2 channel" },
{ 0x03, "Any channel" },
{ 0, NULL }
};
static const value_string q933_not_basic_channel_selection_vals[] = {
{ 0x00, "No channel" },
{ 0x01, "Channel indicated in following octets" },
{ 0x03, "Any channel" },
{ 0, NULL }
};
#define Q933_IS_SLOT_MAP 0x10
static const value_string q933_element_type_vals[] = {
{ 0x03, "B-channel units" },
{ 0x06, "H0-channel units" },
{ 0x08, "H11-channel units" },
{ 0x09, "H12-channel units" },
{ 0, NULL }
};
static const true_false_string tfs_explicitly_implicitly_identified = { "Explicitly identified", "Implicitly identified" };
static const true_false_string tfs_not_basic_basic = { "Not basic", "Basic" };
static const true_false_string tfs_required_preferred = { "Required", "Preferred" };
static const true_false_string tfs_dchannel_not_dchannel = { "D-channel", "Not D-channel" };
static const true_false_string tfs_slot_map_number = { "slot map", "number" };
static void
dissect_q933_channel_identification_ie(tvbuff_t *tvb, int offset, int len,
proto_tree *tree)
{
guint8 octet;
int identifier_offset;
int identifier_len;
guint8 coding_standard;
if (len == 0)
return;
octet = tvb_get_guint8(tvb, offset);
proto_tree_add_item(tree, hf_q933_interface_identified, tvb, offset, 1, ENC_NA);
proto_tree_add_item(tree, hf_q933_interface_basic, tvb, offset, 1, ENC_NA);
proto_tree_add_item(tree, hf_q933_indicated_channel_required, tvb, offset, 1, ENC_NA);
proto_tree_add_item(tree, hf_q933_indicated_channel_d_channel, tvb, offset, 1, ENC_NA);
if (octet & Q933_NOT_BASIC_CHANNEL) {
proto_tree_add_item(tree, hf_q933_not_channel_selection, tvb, offset, 1, ENC_BIG_ENDIAN);
} else {
proto_tree_add_item(tree, hf_q933_channel_selection, tvb, offset, 1, ENC_BIG_ENDIAN);
}
offset += 1;
len -= 1;
if (octet & Q933_INTERFACE_IDENTIFIED) {
identifier_offset = offset;
identifier_len = 0;
do {
if (len == 0)
break;
octet = tvb_get_guint8(tvb, offset);
offset += 1;
len -= 1;
identifier_len++;
} while (!(octet & Q933_IE_VL_EXTENSION));
/*
* XXX - do we want to strip off the 8th bit on the
* last octet of the interface identifier?
*/
if (identifier_len != 0) {
proto_tree_add_item(tree, hf_q933_interface_identifier, tvb, identifier_offset, identifier_len, ENC_NA);
}
}
if (octet & Q933_NOT_BASIC_CHANNEL) {
if (len == 0)
return;
octet = tvb_get_guint8(tvb, offset);
coding_standard = octet & 0x60;
proto_tree_add_uint(tree, hf_q933_coding_standard, tvb, offset, 1, octet);
if (coding_standard != Q933_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_q933_data, tvb, offset, len, ENC_NA);
return;
}
proto_tree_add_item(tree, hf_q933_channel_indicated_by, tvb, offset, 1, ENC_NA);
proto_tree_add_item(tree, (octet & Q933_IS_SLOT_MAP) ? hf_q933_map_element_type : hf_q933_channel_type, tvb, offset, 1, ENC_NA);
/*
* XXX - dump the channel number or slot map.
*/
}
}
/*
* Dissect a Progress indicator information element.
*/
static const value_string q933_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 }
};
static void
dissect_q933_progress_indicator_ie(tvbuff_t *tvb, int offset, int len,
proto_tree *tree)
{
guint8 octet;
guint8 coding_standard;
if (len == 0)
return;
octet = tvb_get_guint8(tvb, offset);
coding_standard = octet & 0x60;
proto_tree_add_uint(tree, hf_q933_coding_standard, tvb, offset, 1, octet);
if (coding_standard != Q933_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_q933_data, tvb, offset, len, ENC_NA);
return;
}
proto_tree_add_item(tree, hf_q933_location, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
len -= 1;
if (len == 0)
return;
proto_tree_add_item(tree, hf_q933_progress_description, tvb, offset, 1, ENC_BIG_ENDIAN);
}
/*
* Dissect a Network-specific facilities or Transit network selection
* information element.
*/
static const value_string q933_netid_type_vals[] = {
{ 0x00, "User specified" },
{ 0x20, "National network identification" },
{ 0x30, "International network identification" },
{ 0, NULL }
};
static const value_string q933_netid_plan_vals[] = {
{ 0x00, "Unknown" },
{ 0x01, "Carrier Identification Code" },
{ 0x03, "X.121 data network identification code" },
{ 0, NULL }
};
static void
dissect_q933_ns_facilities_ie(tvbuff_t *tvb, int offset, int len,
proto_tree *tree)
{
guint8 octet;
int netid_len;
if (len == 0)
return;
octet = tvb_get_guint8(tvb, offset);
netid_len = octet & 0x7F;
proto_tree_add_item(tree, hf_q933_network_identification_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_q933_type_of_network_identification, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(tree, hf_q933_network_identification_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_q933_network_identification, 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_q933_network_specific_facility_specification, tvb, offset, len, ENC_NA);
}
static int
dissect_q933_guint16_value(tvbuff_t *tvb, packet_info *pinfo, int offset, int len,
proto_tree *tree, int hf)
{
guint8 octet;
guint16 value;
int value_len;
value_len = 0;
octet = tvb_get_guint8(tvb, offset);
if (octet & Q933_IE_VL_EXTENSION) {
/*
* Only one octet long - error.
*/
goto bad_length;
}
value = (octet & 0x3) << 14;
offset += 1;
len -= 1;
value_len++;
if (len == 0) {
/*
* We've reached the end of the information element - error.
*/
goto past_end;
}
octet = tvb_get_guint8(tvb, offset);
if (octet & Q933_IE_VL_EXTENSION) {
/*
* Only two octets long - error.
*/
goto bad_length;
}
value |= (octet & 0x7F) << 7;
offset += 1;
len -= 1;
value_len++;
if (len == 0) {
/*
* We've reached the end of the information element - error.
*/
goto past_end;
}
octet = tvb_get_guint8(tvb, offset);
if (!(octet & Q933_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, tvb, offset, value_len, value);
return value_len;
past_end:
proto_tree_add_expert_format(tree, pinfo, &ei_q933_invalid_length, tvb, offset, len,
"%s goes past end of information element", proto_registrar_get_name(hf));
return -1;
bad_length:
proto_tree_add_expert_format(tree, pinfo, &ei_q933_invalid_length, tvb, offset, len,
"%s isn't 3 octets long", proto_registrar_get_name(hf));
return -1;
}
/*
* Dissect an End-to-end transit delay information element.
*/
static void
dissect_q933_e2e_transit_delay_ie(tvbuff_t *tvb, packet_info *pinfo, int offset, int len,
proto_tree *tree)
{
int value_len;
if (len == 0)
return;
value_len = dissect_q933_guint16_value(tvb, pinfo, offset, len, tree,
hf_q933_cumulative_transit_delay);
if (value_len < 0)
return; /* error */
offset += value_len;
len -= value_len;
if (len == 0)
return;
value_len = dissect_q933_guint16_value(tvb, pinfo, offset, len, tree,
hf_q933_requested_end_to_end_transit_delay);
if (value_len < 0)
return; /* error */
offset += value_len;
len -= value_len;
if (len == 0)
return;
/*value_len = */dissect_q933_guint16_value(tvb, pinfo, offset, len, tree,
hf_q933_max_end_to_end_transit_delay);
}
/*
* Dissect a Transit delay selection and indication information element.
*/
static void
dissect_q933_td_selection_and_int_ie(tvbuff_t *tvb, packet_info *pinfo, int offset, int len,
proto_tree *tree)
{
if (len == 0)
return;
dissect_q933_guint16_value(tvb, pinfo, offset, len, tree, hf_q933_transit_delay);
}
static const true_false_string tfs_link_by_link_end_to_end = { "Link-by-link", "End-to-end" };
static const true_false_string tfs_no_request_request_indicated = { "No request/request denied", "Request indicated/request accepted" };
static void
dissect_q933_pl_binary_parameters_ie(tvbuff_t *tvb, int offset, int len,
proto_tree *tree)
{
if (len == 0)
return;
proto_tree_add_item(tree, hf_q933_request, tvb, offset, 1, ENC_NA);
proto_tree_add_item(tree, hf_q933_confirmation, tvb, offset, 1, ENC_NA);
}
/*
* Dissect a Reverse charging indication information element.
*/
static const value_string q933_reverse_charging_indication_vals[] = {
{ 0x01, "Reverse charging requested" },
{ 0, NULL }
};
static void
dissect_q933_reverse_charge_ind_ie(tvbuff_t *tvb, int offset, int len,
proto_tree *tree)
{
if (len == 0)
return;
proto_tree_add_item(tree, hf_q933_reverse_charging_indication, tvb, offset, 1, ENC_BIG_ENDIAN);
}
/*
* Dissect a (phone) number information element.
*/
static const value_string q933_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 q933_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 q933_presentation_indicator_vals[] = {
{ 0x00, "Presentation allowed" },
{ 0x01, "Presentation restricted" },
{ 0x02, "Number not available due to interworking" },
{ 0, NULL }
};
static const value_string q933_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 q933_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_q933_number_ie(tvbuff_t *tvb, int offset, int len,
proto_tree *tree, int hfindex)
{
guint8 octet;
if (len == 0)
return;
octet = tvb_get_guint8(tvb, offset);
proto_tree_add_uint(tree, hf_q933_numbering_plan, tvb, offset, 1, octet);
proto_tree_add_uint(tree, hf_q933_number_type, tvb, offset, 1, octet);
proto_tree_add_boolean(tree, hf_q933_extension_ind, tvb, offset, 1, octet);
offset += 1;
len -= 1;
if (!(octet & Q933_IE_VL_EXTENSION)) {
if (len == 0)
return;
octet = tvb_get_guint8(tvb, offset);
proto_tree_add_uint(tree, hf_q933_screening_ind, tvb, offset, 1, octet);
proto_tree_add_uint(tree, hf_q933_presentation_ind, tvb, offset, 1, octet);
proto_tree_add_boolean(tree, hf_q933_extension_ind, tvb, offset, 1, octet);
offset += 1;
len -= 1;
}
/*
* XXX - only in a Redirecting number information element.
*/
if (!(octet & Q933_IE_VL_EXTENSION)) {
if (len == 0)
return;
proto_tree_add_item(tree, hf_q933_reason_for_redirection, 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);
}
/*
* Dissect a party subaddress information element.
*/
static const value_string q933_subaddress_type_vals[] = {
{ 0x00, "X.213/ISO 8348 Add.2 NSAP" },
{ 0x20, "User-specified" },
{ 0, NULL }
};
static const value_string q933_odd_even_indicator_vals[] = {
{ 0x00, "Even number of address signals" },
{ 0x10, "Odd number of address signals" },
{ 0, NULL }
};
static void
dissect_q933_party_subaddr_ie(tvbuff_t *tvb, int offset, int len,
proto_tree *tree)
{
if (len == 0)
return;
proto_tree_add_item(tree, hf_q933_type_of_subaddress, tvb, offset, 1, ENC_BIG_ENDIAN);
proto_tree_add_item(tree, hf_q933_odd_even_indicator, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
len -= 1;
if (len == 0)
return;
proto_tree_add_item(tree, hf_q933_subaddress, tvb, offset, len, ENC_NA);
}
/*
* Dissect a High-layer compatibility information element.
*/
#define Q933_AUDIOVISUAL 0x60
static const value_string q933_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" },
{ Q933_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" },
{ 0, NULL }
};
static const value_string q933_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 void
dissect_q933_high_layer_compat_ie(tvbuff_t *tvb, int offset, int len,
proto_tree *tree)
{
guint8 octet;
guint8 coding_standard;
guint8 characteristics;
if (len == 0)
return;
octet = tvb_get_guint8(tvb, offset);
coding_standard = octet & 0x60;
proto_tree_add_uint(tree, hf_q933_coding_standard, tvb, offset, 1, octet);
offset += 1;
len -= 1;
if (coding_standard != Q933_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_q933_data, tvb, offset, len, ENC_NA);
return;
}
if (len == 0)
return;
octet = tvb_get_guint8(tvb, offset);
characteristics = octet & 0x7F;
proto_tree_add_item(tree, hf_q933_high_layer_characteristics_identification, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
len -= 1;
if (!(octet & Q933_IE_VL_EXTENSION)) {
if (len == 0)
return;
if (characteristics == Q933_AUDIOVISUAL) {
proto_tree_add_item(tree, hf_q933_extended_audiovisual_characteristics_id, tvb, offset, 1, ENC_BIG_ENDIAN);
} else {
proto_tree_add_item(tree, hf_q933_extended_high_layer_characteristics_id, tvb, offset, 1, ENC_BIG_ENDIAN);
}
}
}
/*
* Dissect a User-user information element.
*/
#define Q933_PROTOCOL_DISCRIMINATOR_IA5 0x04
#define Q933_PROTOCOL_DISCRIMINATOR_ASN1 0x05
static const value_string q933_protocol_discriminator_vals[] = {
{ 0x00, "User-specific protocol" },
{ 0x01, "OSI high layer protocols" },
{ 0x02, "X.244" },
{ Q933_PROTOCOL_DISCRIMINATOR_IA5, "IA5 characters" },
{ Q933_PROTOCOL_DISCRIMINATOR_ASN1, "X.208 and X.209 coded user information" },
{ 0x07, "V.120 rate adaption" },
{ 0x08, "Q.933/I.451 user-network call control messages" },
{ 0, NULL }
};
static void
dissect_q933_user_user_ie(tvbuff_t *tvb, int offset, int len,
proto_tree *tree)
{
guint8 octet;
if (len == 0)
return;
octet = tvb_get_guint8(tvb, offset);
proto_tree_add_item(tree, hf_q933_protocol_discriminator, tvb, offset, 1, ENC_BIG_ENDIAN);
offset += 1;
len -= 1;
if (len == 0)
return;
switch (octet) {
case Q933_PROTOCOL_DISCRIMINATOR_IA5:
proto_tree_add_item(tree, hf_q933_user_information_str, tvb, offset, len, ENC_NA|ENC_ASCII);
break;
default:
proto_tree_add_item(tree, hf_q933_user_information_bytes, tvb, offset, len, ENC_NA);
break;
}
}
/*
* Dissect information elements consisting of ASCII^H^H^H^H^HIA5 text.
*/
static void
dissect_q933_ia5_ie(tvbuff_t *tvb, int offset, int len, proto_tree *tree, int hf)
{
if (len != 0) {
proto_tree_add_item(tree, hf, tvb, offset, len, ENC_ASCII|ENC_NA);
}
}
static const value_string q933_codeset_vals[] = {
{ 0x00, "Q.933 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 int
dissect_q933(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
{
int offset = 0;
proto_tree *q933_tree = NULL;
proto_item *ti;
proto_tree *ie_tree = NULL;
guint8 call_ref_len;
guint8 call_ref[16];
guint8 message_type;
guint8 info_element;
guint16 info_element_len;
int codeset, locked_codeset;
gboolean non_locking_shift;
col_set_str(pinfo->cinfo, COL_PROTOCOL, "Q.933");
if (tree) {
ti = proto_tree_add_item(tree, proto_q933, tvb, offset, -1,
ENC_NA);
q933_tree = proto_item_add_subtree(ti, ett_q933);
dissect_q933_protocol_discriminator(tvb, offset, q933_tree);
}
offset += 1;
call_ref_len = tvb_get_guint8(tvb, offset) & 0xF; /* XXX - do as a bit field? */
if (q933_tree != NULL)
proto_tree_add_uint(q933_tree, hf_q933_call_ref_len, tvb, offset, 1, call_ref_len);
offset += 1;
if (call_ref_len != 0) {
tvb_memcpy(tvb, call_ref, offset, call_ref_len);
proto_tree_add_boolean(q933_tree, hf_q933_call_ref_flag,
tvb, offset, 1, (call_ref[0] & 0x80) != 0);
call_ref[0] &= 0x7F;
proto_tree_add_bytes(q933_tree, hf_q933_call_ref,
tvb, offset, call_ref_len, call_ref);
offset += call_ref_len;
}
message_type = tvb_get_guint8(tvb, offset);
col_add_str(pinfo->cinfo, COL_INFO,
val_to_str(message_type, q933_message_type_vals,
"Unknown message type (0x%02X)"));
proto_tree_add_uint(q933_tree, hf_q933_message_type, tvb, offset, 1, message_type);
offset += 1;
/*
* And now for the information elements....
*/
codeset = locked_codeset = 0; /* start out in codeset 0 */
while (tvb_reported_length_remaining(tvb, offset) > 0) {
info_element = tvb_get_guint8(tvb, offset);
/* Check for the codeset shift */
if ((info_element & Q933_IE_SO_MASK) &&
((info_element & Q933_IE_SO_IDENTIFIER_MASK) == Q933_IE_SHIFT)) {
non_locking_shift = info_element & Q933_IE_SHIFT_NON_LOCKING;
codeset = info_element & Q933_IE_SHIFT_CODESET;
if (!non_locking_shift)
locked_codeset = codeset;
proto_tree_add_item(q933_tree, non_locking_shift ? hf_q933_non_locking_shift_to_codeset : hf_q933_locking_shift_to_codeset, tvb, offset, 1, ENC_NA);
offset += 1;
continue;
}
/*
* Check for the single-octet IEs.
*/
if (info_element & Q933_IE_SO_MASK) {
switch ((codeset << 8) | (info_element & Q933_IE_SO_IDENTIFIER_MASK)) {
case CS0 | Q933_IE_REPEAT_INDICATOR:
proto_tree_add_item(q933_tree, hf_q933_repeat_indicator, tvb, offset, 1, ENC_BIG_ENDIAN);
break;
default:
proto_tree_add_expert_format(q933_tree, pinfo, &ei_q933_information_element, tvb, offset, 1,
"Unknown information element (0x%02X)", info_element);
break;
}
offset += 1;
codeset = locked_codeset;
continue;
}
/*
* Variable-length IE.
*/
info_element_len = tvb_get_guint8(tvb, offset + 1);
if (q933_tree != NULL) {
ie_tree = proto_tree_add_subtree(q933_tree, tvb, offset,
1+1+info_element_len, ett_q933_ie, NULL,
val_to_str(info_element, q933_info_element_vals[codeset],
"Unknown information element (0x%02X)"));
proto_tree_add_uint_format_value(ie_tree, hf_q933_information_element, tvb, offset, 1, info_element,
"%s", val_to_str(info_element, q933_info_element_vals[codeset], "Unknown (0x%02X)"));
proto_tree_add_item(ie_tree, hf_q933_length, tvb, offset + 1, 1, ENC_BIG_ENDIAN);
switch ((codeset << 8) | info_element) {
case CS0 | Q933_IE_SEGMENTED_MESSAGE:
dissect_q933_segmented_message_ie(tvb,
pinfo, offset + 2, info_element_len,
ie_tree);
break;
case CS0 | Q933_IE_BEARER_CAPABILITY:
case CS0 | Q933_IE_LOW_LAYER_COMPAT:
dissect_q933_bearer_capability_ie(tvb,
offset + 2, info_element_len,
ie_tree);
break;
case CS0 | Q933_IE_CAUSE:
dissect_q933_cause_ie(tvb,
offset + 2, info_element_len,
ie_tree,
hf_q933_cause_value);
break;
case CS0 | Q933_IE_CALL_STATE:
dissect_q933_call_state_ie(tvb,
offset + 2, info_element_len,
ie_tree);
break;
case CS0 | Q933_IE_CHANNEL_IDENTIFICATION:
dissect_q933_channel_identification_ie(
tvb, offset + 2, info_element_len,
ie_tree);
break;
case CS0 | Q933_IE_PROGRESS_INDICATOR:
dissect_q933_progress_indicator_ie(tvb,
offset + 2, info_element_len,
ie_tree);
break;
case CS0 | Q933_IE_NETWORK_SPECIFIC_FACIL:
case CS0 | Q933_IE_TRANSIT_NETWORK_SEL:
dissect_q933_ns_facilities_ie(tvb,
offset + 2, info_element_len,
ie_tree);
break;
case CS0 | Q933_IE_DISPLAY:
dissect_q933_ia5_ie(tvb, offset + 2,
info_element_len, ie_tree,
hf_q933_display_information);
break;
case CS0 | Q933_IE_E2E_TRANSIT_DELAY:
dissect_q933_e2e_transit_delay_ie(tvb,
pinfo, offset + 2, info_element_len,
ie_tree);
break;
case CS0 | Q933_IE_TD_SELECTION_AND_INT:
dissect_q933_td_selection_and_int_ie(
tvb, pinfo, offset + 2, info_element_len,
ie_tree);
break;
case CS0 | Q933_IE_PL_BINARY_PARAMETERS:
dissect_q933_pl_binary_parameters_ie(
tvb, offset + 2, info_element_len,
ie_tree);
break;
case CS0 | Q933_IE_REVERSE_CHARGE_IND:
dissect_q933_reverse_charge_ind_ie(tvb,
offset + 2, info_element_len,
ie_tree);
break;
case CS0 | Q933_IE_CALLING_PARTY_NUMBER:
dissect_q933_number_ie(tvb,
offset + 2, info_element_len,
ie_tree,
hf_q933_calling_party_number);
break;
case CS0 | Q933_IE_CONNECTED_NUMBER:
dissect_q933_number_ie(tvb,
offset + 2, info_element_len,
ie_tree,
hf_q933_connected_number);
break;
case CS0 | Q933_IE_CALLED_PARTY_NUMBER:
dissect_q933_number_ie(tvb,
offset + 2, info_element_len,
ie_tree,
hf_q933_called_party_number);
break;
case CS0 | Q933_IE_CALLING_PARTY_SUBADDR:
case CS0 | Q933_IE_CALLED_PARTY_SUBADDR:
dissect_q933_party_subaddr_ie(tvb,
offset + 2, info_element_len,
ie_tree);
break;
case CS0 | Q933_IE_HIGH_LAYER_COMPAT:
dissect_q933_high_layer_compat_ie(tvb,
offset + 2, info_element_len,
ie_tree);
break;
case CS0 | Q933_IE_USER_USER:
dissect_q933_user_user_ie(tvb,
offset + 2, info_element_len,
ie_tree);
break;
case CS0 | Q933_IE_REPORT_TYPE:
case CS5 | Q933_IE_REPORT_TYPE:
case CS5 | Q933_IE_ANSI_REPORT_TYPE:
dissect_q933_report_type_ie(tvb,
offset + 2, info_element_len,
ie_tree);
break;
case CS0 | Q933_IE_LINK_INTEGRITY_VERF:
case CS5 | Q933_IE_LINK_INTEGRITY_VERF:
case CS5 | Q933_IE_ANSI_LINK_INTEGRITY_VERF:
dissect_q933_link_integrity_verf_ie(tvb,
offset + 2, info_element_len,
ie_tree);
break;
case CS0 | Q933_IE_PVC_STATUS:
case CS5 | Q933_IE_PVC_STATUS:
case CS5 | Q933_IE_ANSI_PVC_STATUS:
dissect_q933_pvc_status_ie(tvb,
offset + 2, info_element_len,
ie_tree);
break;
default:
proto_tree_add_item(ie_tree, hf_q933_data, tvb, offset + 2, info_element_len, ENC_NA);
break;
}
}
offset += 1 + 1 + info_element_len;
codeset = locked_codeset;
}
return tvb_captured_length(tvb);
}
void
proto_register_q933(void)
{
static hf_register_info hf[] = {
{ &hf_q933_discriminator,
{ "Protocol discriminator", "q933.disc", FT_UINT8, BASE_HEX, NULL, 0x0,
NULL, HFILL }},
{ &hf_q933_call_ref_flag,
{ "Call reference flag", "q933.call_ref_flag", FT_BOOLEAN, BASE_NONE, TFS(&tfs_call_ref_flag), 0x0,
NULL, HFILL }},
{ &hf_q933_call_ref,
{ "Call reference value", "q933.call_ref", FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_q933_coding_standard,
{ "Coding standard", "q933.coding_standard", FT_UINT8, BASE_HEX,
VALS(q933_coding_standard_vals), 0x60,NULL, HFILL }},
{ &hf_q933_information_transfer_capability,
{ "Information transfer capability", "q933.information_transfer_capability", FT_UINT8, BASE_HEX,
VALS(q933_information_transfer_capability_vals), 0x1f,NULL, HFILL }},
{ &hf_q933_transfer_mode,
{ "Transfer mode", "q933.transfer_mode", FT_UINT8, BASE_HEX,
VALS(q933_transfer_mode_vals), 0x60,NULL, HFILL }},
{ &hf_q933_uil1,
{ "User information layer 1 protocol", "q933.uil1", FT_UINT8, BASE_HEX,
VALS(q933_uil1_vals), 0x1f,NULL, HFILL }},
{ &hf_q933_call_ref_len,
{ "Call reference value length", "q933.call_ref_len", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_q933_message_type,
{ "Message type", "q933.message_type", FT_UINT8, BASE_HEX, VALS(q933_message_type_vals), 0x0,
NULL, HFILL }},
{ &hf_q933_cause_location,
{ "Cause location", "q933.cause_location", FT_UINT8, BASE_DEC, VALS(q933_cause_location_vals), 0x0f,
NULL, HFILL }},
{ &hf_q933_cause_value,
{ "Cause value", "q933.cause_value", FT_UINT8, BASE_DEC, VALS(q933_cause_code_vals), 0x7f,
NULL, HFILL }},
{ &hf_q933_number_type,
{ "Number type", "q933.number_type", FT_UINT8, BASE_HEX, VALS(q933_number_type_vals), 0x70,
NULL, HFILL }},
{ &hf_q933_numbering_plan,
{ "numbering plan", "q933.numbering_plan", FT_UINT8, BASE_HEX, VALS(q933_numbering_plan_vals), 0x0f,
NULL, HFILL }},
{ &hf_q933_screening_ind,
{ "Screening indicator", "q933.screening_ind", FT_UINT8, BASE_HEX, VALS(q933_screening_indicator_vals), 0x03,
NULL, HFILL }},
{ &hf_q933_presentation_ind,
{ "Presentation indicator", "q933.presentation_ind", FT_UINT8, BASE_HEX, VALS(q933_presentation_indicator_vals), 0x60,
NULL, HFILL }},
{ &hf_q933_extension_ind,
{ "Extension indicator", "q933.extension_ind",
FT_BOOLEAN, 8, TFS(&q933_extension_ind_value), 0x80,
NULL, HFILL }},
{ &hf_q933_calling_party_number,
{ "Calling party number digits", "q933.calling_party_number.digits", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_q933_called_party_number,
{ "Called party number digits", "q933.called_party_number.digits", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
{ &hf_q933_connected_number,
{ "Connected party number digits", "q933.connected_number.digits", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
#if 0
{ &hf_q933_redirecting_number,
{ "Redirecting party number digits", "q933.redirecting_number.digits", FT_STRING, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
#endif
{ &hf_q933_report_type,
{ "Report type", "q933.report_type", FT_UINT8, BASE_DEC, VALS(q933_report_type_vals), 0x0,
NULL, HFILL }},
{ &hf_q933_link_verf_txseq,
{ "TX Sequence", "q933.link_verification.txseq", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_q933_link_verf_rxseq,
{ "RX Sequence", "q933.link_verification.rxseq", FT_UINT8, BASE_DEC, NULL, 0x0,
NULL, HFILL }},
{ &hf_q933_data,
{ "Data", "q933.data", FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL }},
/* Generated from convert_proto_tree_add_text.pl */
{ &hf_q933_first_segment, { "First segment", "q933.first_segment", FT_UINT8, BASE_DEC|BASE_UNIT_STRING, &units_segment_remaining, 0x7F, NULL, HFILL }},
{ &hf_q933_not_first_segment, { "Not first segment", "q933.not_first_segment", FT_UINT8, BASE_DEC|BASE_UNIT_STRING, &units_segment_remaining, 0x7F, NULL, HFILL }},
{ &hf_q933_segmented_message_type, { "Segmented message type", "q933.segmented_message_type", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_q933_out_band_negotiation, { "Out-band negotiation", "q933.out_band_negotiation", FT_BOOLEAN, 8, TFS(&tfs_possible_not_possible), 0x40, NULL, HFILL }},
{ &hf_q933_layer_1, { "Layer 1", "q933.layer_1", FT_BOOLEAN, 8, TFS(&tfs_asynchronous_synchronous), 0x40, NULL, HFILL }},
{ &hf_q933_user_rate, { "User rate", "q933.user_rate", FT_UINT8, BASE_DEC, VALS(q933_l1_user_rate_vals), 0x1F, NULL, HFILL }},
{ &hf_q933_rate_adaption_header, { "Rate adaption header", "q933.rate_adaption_header", FT_BOOLEAN, 8, TFS(&tfs_included_not_included), 0x40, NULL, HFILL }},
{ &hf_q933_multiple_frame_establishment, { "Multiple frame establishment", "q933.multiple_frame_establishment", FT_BOOLEAN, 8, TFS(&tfs_supported_not_supported), 0x20, NULL, HFILL }},
{ &hf_q933_mode_of_operation, { "Mode of operation", "q933.mode_of_operation", FT_BOOLEAN, 8, TFS(&tfs_protocol_sensative_bit_transparent), 0x10, NULL, HFILL }},
{ &hf_q933_stop_bits, { "Stop bits", "q933.stop_bits", FT_UINT8, BASE_DEC, VALS(q933_l1_stop_bits_vals), 0x60, NULL, HFILL }},
{ &hf_q933_data_bits, { "Data bits", "q933.data_bits", FT_UINT8, BASE_DEC, VALS(q933_l1_data_bits_vals), 0x18, NULL, HFILL }},
{ &hf_q933_parity, { "Parity", "q933.parity", FT_UINT8, BASE_DEC, VALS(q933_l1_parity_vals), 0x07, NULL, HFILL }},
{ &hf_q933_duplex, { "Duplex", "q933.duplex", FT_BOOLEAN, 8, TFS(&tfs_full_half), 0x40, NULL, HFILL }},
{ &hf_q933_modem_type, { "Modem type (Network-specific rules)", "q933.modem_type", FT_UINT8, BASE_HEX, NULL, 0x3F, NULL, HFILL }},
{ &hf_q933_user_information_layer_2_protocol, { "User information layer 2 protocol", "q933.user_information_layer_2_protocol", FT_UINT8, BASE_HEX, VALS(q933_uil2_vals), 0x1F, NULL, HFILL }},
{ &hf_q933_user_specified_layer_2_protocol_information, { "User-specified layer 2 protocol information", "q933.user_specified_layer_2_protocol_information", FT_UINT8, BASE_HEX, NULL, 0x7F, NULL, HFILL }},
{ &hf_q933_address_inclusion, { "Address inclusion", "q933.address_inclusion", FT_UINT8, BASE_HEX, VALS(q933_address_inclusion_vals), 0x03, NULL, HFILL }},
{ &hf_q933_user_information_layer_3_protocol, { "User information layer 3 protocol", "q933.user_information_layer_3_protocol", FT_UINT8, BASE_HEX, VALS(q933_uil3_vals), 0x1F, NULL, HFILL }},
{ &hf_q933_mode, { "Mode", "q933.mode", FT_UINT8, BASE_HEX, VALS(q933_mode_vals), 0x60, NULL, HFILL }},
{ &hf_q933_default_packet_size_0F, { "Default packet size", "q933.default_packet_size", FT_UINT8, BASE_DEC, NULL, 0x0F, NULL, HFILL }},
{ &hf_q933_packet_window_size, { "Packet window size", "q933.packet_window_size", FT_UINT8, BASE_DEC, NULL, 0x7F, NULL, HFILL }},
{ &hf_q933_default_packet_size, { "Default packet size", "q933.default_packet_size", FT_UINT8, BASE_DEC|BASE_UNIT_STRING, &units_octet_octets, 0x0, NULL, HFILL }},
{ &hf_q933_additional_layer_3_protocol_information, { "Additional layer 3 protocol information", "q933.additional_layer_3_protocol_information", FT_UINT16, BASE_HEX, VALS(nlpid_vals), 0x0FF0, NULL, HFILL }},
{ &hf_q933_recommendation, { "Recommendation", "q933.recommendation", FT_UINT8, BASE_HEX, VALS(q933_cause_recommendation_vals), 0x7F, NULL, HFILL }},
{ &hf_q933_network_service, { "Network service", "q933.network_service", FT_BOOLEAN, 8, TFS(&tfs_user_provider), 0x80, NULL, HFILL }},
{ &hf_q933_condition_normal, { "Condition", "q933.condition_normal", FT_BOOLEAN, 8, NULL, 0x40, NULL, HFILL }},
{ &hf_q933_condition, { "Condition", "q933.condition", FT_UINT8, BASE_HEX, VALS(q933_cause_condition_vals), 0x03, NULL, HFILL }},
{ &hf_q933_rejection_reason, { "Rejection reason", "q933.rejection_reason", FT_UINT8, BASE_HEX, VALS(q933_rejection_reason_vals), 0x7C, NULL, HFILL }},
{ &hf_q933_user_specific_diagnostic, { "User specific diagnostic", "q933.user_specific_diagnostic", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_q933_missing_information_element, { "Missing information element", "q933.missing_information_element", FT_UINT8, BASE_HEX, VALS(q933_info_element_vals0), 0x0, NULL, HFILL }},
{ &hf_q933_insufficient_information_element, { "Insufficient information element", "q933.insufficient_information_element", FT_UINT8, BASE_HEX, VALS(q933_info_element_vals0), 0x0, NULL, HFILL }},
{ &hf_q933_diagnostic, { "Diagnostic", "q933.diagnostic", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_q933_information_element, { "Information element", "q933.information_element", FT_UINT8, BASE_HEX, VALS(q933_info_element_vals0), 0x0, NULL, HFILL }},
{ &hf_q933_timer, { "Timer", "q933.timer", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_q933_call_state, { "Call state", "q933.call_state", FT_UINT8, BASE_HEX, VALS(q933_call_state_vals), 0x3F, NULL, HFILL }},
{ &hf_q933_dlci, { "DLCI", "q933.dlci", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_q933_status, { "Status", "q933.status", FT_UINT8, BASE_DEC, VALS(q933_pvc_status_vals), 0x0E, NULL, HFILL }},
{ &hf_q933_interface_identified, { "Interface", "q933.interface_identified", FT_BOOLEAN, 8, TFS(&tfs_explicitly_implicitly_identified), Q933_INTERFACE_IDENTIFIED, NULL, HFILL }},
{ &hf_q933_interface_basic, { "Interface", "q933.interface_basic", FT_BOOLEAN, 8, TFS(&tfs_not_basic_basic), Q933_NOT_BASIC_CHANNEL, NULL, HFILL }},
{ &hf_q933_indicated_channel_required, { "Indicated channel", "q933.indicated_channel_required", FT_BOOLEAN, 8, TFS(&tfs_required_preferred), 0x08, NULL, HFILL }},
{ &hf_q933_indicated_channel_d_channel, { "Indicated channel", "q933.indicated_channel_d_channel", FT_BOOLEAN, 8, TFS(&tfs_dchannel_not_dchannel), 0x04, NULL, HFILL }},
{ &hf_q933_not_channel_selection, { "Channel selection", "q933.channel_selection", FT_UINT8, BASE_HEX, VALS(q933_not_basic_channel_selection_vals), 0x03, NULL, HFILL }},
{ &hf_q933_channel_selection, { "Channel selection", "q933.channel_selection", FT_UINT8, BASE_HEX, VALS(q933_basic_channel_selection_vals), 0x03, NULL, HFILL }},
{ &hf_q933_interface_identifier, { "Interface identifier", "q933.interface_identifier", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_q933_channel_indicated_by, { "Channel indicated by", "q933.channel_indicated_by", FT_BOOLEAN, 8, TFS(&tfs_slot_map_number), Q933_IS_SLOT_MAP, NULL, HFILL }},
{ &hf_q933_map_element_type, { "Map element type", "q933.map_element_type", FT_UINT8, BASE_HEX, VALS(q933_element_type_vals), 0x0F, NULL, HFILL }},
{ &hf_q933_channel_type, { "Channel", "q933.channel_type", FT_UINT8, BASE_HEX, VALS(q933_element_type_vals), 0x0F, NULL, HFILL }},
{ &hf_q933_location, { "Location", "q933.location", FT_UINT8, BASE_HEX, VALS(q933_cause_location_vals), 0x0F, NULL, HFILL }},
{ &hf_q933_progress_description, { "Progress description", "q933.progress_description", FT_UINT8, BASE_HEX, VALS(q933_progress_description_vals), 0x7F, NULL, HFILL }},
{ &hf_q933_network_identification_length, { "Network identification length", "q933.network_identification_length", FT_UINT8, BASE_DEC, NULL, 0x7F, NULL, HFILL }},
{ &hf_q933_type_of_network_identification, { "Type of network identification", "q933.type_of_network_identification", FT_UINT8, BASE_HEX, VALS(q933_netid_type_vals), 0x70, NULL, HFILL }},
{ &hf_q933_network_identification_plan, { "Network identification plan", "q933.network_identification_plan", FT_UINT8, BASE_HEX, VALS(q933_netid_plan_vals), 0x0F, NULL, HFILL }},
{ &hf_q933_network_identification, { "Network identification", "q933.network_identification", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_q933_network_specific_facility_specification, { "Network-specific facility specification", "q933.network_specific_facility_specification", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_q933_confirmation, { "Confirmation", "q933.confirmation", FT_BOOLEAN, 8, TFS(&tfs_link_by_link_end_to_end), 0x02, NULL, HFILL }},
{ &hf_q933_reverse_charging_indication, { "Reverse charging indication", "q933.reverse_charging_indication", FT_UINT8, BASE_HEX, VALS(q933_reverse_charging_indication_vals), 0x07, NULL, HFILL }},
{ &hf_q933_reason_for_redirection, { "Reason for redirection", "q933.reason_for_redirection", FT_UINT8, BASE_HEX, VALS(q933_redirection_reason_vals), 0x0F, NULL, HFILL }},
{ &hf_q933_type_of_subaddress, { "Type of subaddress", "q933.type_of_subaddress", FT_UINT8, BASE_HEX, VALS(q933_subaddress_type_vals), 0x70, NULL, HFILL }},
{ &hf_q933_odd_even_indicator, { "Odd/even indicator", "q933.odd_even_indicator", FT_UINT8, BASE_HEX, VALS(q933_odd_even_indicator_vals), 0x10, NULL, HFILL }},
{ &hf_q933_subaddress, { "Subaddress", "q933.subaddress", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_q933_high_layer_characteristics_identification, { "High layer characteristics identification", "q933.high_layer_characteristics_identification", FT_UINT8, BASE_HEX, VALS(q933_high_layer_characteristics_vals), 0x7F, NULL, HFILL }},
{ &hf_q933_extended_audiovisual_characteristics_id, { "Extended audiovisual characteristics identification", "q933.extended_audiovisual_characteristics_id", FT_UINT8, BASE_HEX, VALS(q933_audiovisual_characteristics_vals), 0x7F, NULL, HFILL }},
{ &hf_q933_extended_high_layer_characteristics_id, { "Extended high layer characteristics identification", "q933.extended_high_layer_characteristics_id", FT_UINT8, BASE_HEX, VALS(q933_high_layer_characteristics_vals), 0x7F, NULL, HFILL }},
{ &hf_q933_protocol_discriminator, { "Protocol discriminator", "q933.protocol_discriminator", FT_UINT8, BASE_HEX, VALS(q933_protocol_discriminator_vals), 0x0, NULL, HFILL }},
{ &hf_q933_user_information_str, { "User information", "q933.user_information_str", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_q933_user_information_bytes, { "User information", "q933.user_information_bytes", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_q933_locking_shift_to_codeset, { "Locking shift to codeset", "q933.locking_shift_to_codeset", FT_UINT8, BASE_DEC, VALS(q933_codeset_vals), Q933_IE_SHIFT_CODESET, NULL, HFILL }},
{ &hf_q933_non_locking_shift_to_codeset, { "Non-locking shift to codeset", "q933.non_locking_shift_to_codeset", FT_UINT8, BASE_DEC, VALS(q933_codeset_vals), Q933_IE_SHIFT_CODESET, NULL, HFILL }},
{ &hf_q933_repeat_indicator, { "Repeat indicator", "q933.repeat_indicator", FT_UINT8, BASE_HEX, VALS(q933_repeat_indication_vals), Q933_IE_SO_IE_MASK, NULL, HFILL }},
{ &hf_q933_length, { "Length", "q933.length", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }},
{ &hf_q933_diagnostics, { "Diagnostics", "q933.diagnostics", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_q933_display_information, { "Display information", "q933.display_information", FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL }},
{ &hf_q933_cumulative_transit_delay, { "Cumulative transit delay", "q933.cumulative_transit_delay", FT_UINT32, BASE_DEC|BASE_UNIT_STRING, &units_milliseconds, 0x0, NULL, HFILL }},
{ &hf_q933_requested_end_to_end_transit_delay, { "Requested end-to-end transit delay", "q933.requested_end_to_end_transit_delay", FT_UINT32, BASE_DEC|BASE_UNIT_STRING, &units_milliseconds, 0x0, NULL, HFILL }},
{ &hf_q933_max_end_to_end_transit_delay, { "Maximum end-to-end transit delay", "q933.max_end_to_end_transit_delay", FT_UINT32, BASE_DEC|BASE_UNIT_STRING, &units_milliseconds, 0x0, NULL, HFILL }},
{ &hf_q933_transit_delay, { "Transit Delay", "q933.transit_delay", FT_UINT32, BASE_DEC|BASE_UNIT_STRING, &units_milliseconds, 0x0, NULL, HFILL }},
{ &hf_q933_request, { "Request", "q933.request", FT_BOOLEAN, 8, TFS(&tfs_no_request_request_indicated), 0x04, NULL, HFILL }},
};
static gint *ett[] = {
&ett_q933,
&ett_q933_ie,
};
static ei_register_info ei[] = {
{ &ei_q933_invalid_length, { "q933.invalid_length", PI_MALFORMED, PI_ERROR, "Invalid length", EXPFILL }},
{ &ei_q933_information_element, { "q933.information_element.unknown", PI_PROTOCOL, PI_WARN, "Unknown information element", EXPFILL }},
};
expert_module_t* expert_q933;
proto_q933 = proto_register_protocol("Q.933", "Q.933", "q933");
proto_register_field_array (proto_q933, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
expert_q933 = expert_register_protocol(proto_q933);
expert_register_field_array(expert_q933, ei, array_length(ei));
q933_handle = register_dissector("q933", dissect_q933, proto_q933);
}
void
proto_reg_handoff_q933(void)
{
dissector_add_uint("fr.osinl", NLPID_Q_933, q933_handle);
dissector_add_uint("juniper.proto", JUNIPER_PROTO_Q933, q933_handle);
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 8
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
* :indentSize=8:tabSize=8:noTabs=false:
*/
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