diff options
Diffstat (limited to 'epan/dissectors/packet-q933.c')
-rw-r--r-- | epan/dissectors/packet-q933.c | 2150 |
1 files changed, 2150 insertions, 0 deletions
diff --git a/epan/dissectors/packet-q933.c b/epan/dissectors/packet-q933.c new file mode 100644 index 0000000000..96b48a528b --- /dev/null +++ b/epan/dissectors/packet-q933.c @@ -0,0 +1,2150 @@ +/* packet-q933.c + * Routines for Q.933 frame disassembly + * Guy Harris <guy@alum.mit.edu> + * + * $Id$ + * + * Ethereal - Network traffic analyzer + * By Gerald Combs <gerald@ethereal.com> + * Copyright 1998 + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include <stdio.h> +#include <glib.h> +#include <string.h> +#include <epan/packet.h> +#include <epan/strutil.h> +#include "nlpid.h" + +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 gint ett_q933 = -1; +static gint ett_q933_ie = -1; + +/* + * 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 */ +static const value_string q933_info_element_vals5[] = { + { 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, int offset, int len, + proto_tree *tree) +{ + if (len != 2) { + proto_tree_add_text(tree, tvb, offset, len, + "Segmented message: length is %d, should be 2", len); + return; + } + if (tvb_get_guint8(tvb, offset) & 0x80) { + proto_tree_add_text(tree, tvb, offset, 1, + "First segment: %u segments remaining", + tvb_get_guint8(tvb, offset) & 0x7F); + } else { + proto_tree_add_text(tree, tvb, offset, 1, + "Not first segment: %u segments remaining", + tvb_get_guint8(tvb, offset) & 0x7F); + } + proto_tree_add_text(tree, tvb, offset + 1, 1, + "Segmented message type: %u", tvb_get_guint8(tvb, offset + 1)); +} + +/* + * 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(tree, hf_q933_discriminator, + tvb, offset, 1, discriminator, + "Protocol discriminator: Q.933"); + } else if (discriminator == NLPID_Q_2931) { + proto_tree_add_uint_format(tree, hf_q933_discriminator, + tvb, offset, 1, discriminator, + "Protocol discriminator: Q.2931"); + } else if ((discriminator >= 16 && discriminator < 63) + || ((discriminator >= 80) && (discriminator < 254))) { + proto_tree_add_uint_format(tree, hf_q933_discriminator, + tvb, offset, 1, discriminator, + "Protocol discriminator: Network layer or layer 3 protocol (0x%02X)", + discriminator); + } else if (discriminator >= 64 && discriminator <= 79) { + proto_tree_add_uint_format(tree, hf_q933_discriminator, + tvb, offset, 1, discriminator, + "Protocol discriminator: National use (0x%02X)", + discriminator); + } else { + proto_tree_add_uint_format(tree, hf_q933_discriminator, + tvb, offset, 1, discriminator, + "Protocol discriminator: Reserved (0x%02X)", + discriminator); + } +} + +void +dissect_q933_bearer_capability_ie(tvbuff_t *tvb, int offset, int len, + proto_tree *tree) +{ + guint8 octet; + guint8 coding_standard; + guint8 modem_type; + guint8 uil2_protocol; + guint8 uil3_protocol; + guint8 add_l3_info; + + if (len == 0) + return; + octet = tvb_get_guint8(tvb, offset); + coding_standard = octet & 0x60; + if (coding_standard != 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_text(tree, tvb, offset, + len, "Data: %s", + tvb_bytes_to_str(tvb, offset, len)); + 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; + octet = tvb_get_guint8(tvb, offset); + proto_tree_add_text(tree, tvb, offset, 1, + "Out-band negotiation %spossible", + (octet & 0x40) ? "" : "not "); + 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_text(tree, tvb, offset, 1, + "Layer 1 is %s", + (octet & 0x40) ? "Asynchronous" : "Synchronous"); + proto_tree_add_text(tree, tvb, offset, 1, + "User rate: %s", + val_to_str(octet & 0x1F, q933_l1_user_rate_vals, + "Unknown (0x%02X)")); + 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_text(tree, tvb, offset, 1, + "Rate adaption header %sincluded", + (octet & 0x40) ? "" : "not "); + proto_tree_add_text(tree, tvb, offset, 1, + "Multiple frame establishment %ssupported", + (octet & 0x20) ? "" : "not "); + proto_tree_add_text(tree, tvb, offset, 1, + "%s mode of operation", + (octet & 0x10) ? "Protocol sensitive" : "Bit transparent"); + 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_text(tree, tvb, offset, 1, + "Stop bits: %s", + val_to_str(octet & 0x60, q933_l1_stop_bits_vals, + "Unknown (0x%X)")); + proto_tree_add_text(tree, tvb, offset, 1, + "Data bits: %s", + val_to_str(octet & 0x18, q933_l1_data_bits_vals, + "Unknown (0x%X)")); + proto_tree_add_text(tree, tvb, offset, 1, + "Parity: %s", + val_to_str(octet & 0x07, q933_l1_parity_vals, + "Unknown (0x%X)")); + + if (octet & Q933_IE_VL_EXTENSION) + goto l1_done; + if (len == 0) + return; + octet = tvb_get_guint8(tvb, offset); + proto_tree_add_text(tree, tvb, offset, 1, + "%s duplex", + (octet & 0x40) ? "Full" : "Half"); + modem_type = octet & 0x3F; + proto_tree_add_text(tree, tvb, offset, 1, + "Modem type: Network-specific rules 0x%02X", modem_type); + 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_text(tree, tvb, offset, 1, + "User information layer 2 protocol: %s", + val_to_str(uil2_protocol, q933_uil2_vals, + "Unknown (0x%02X)")); + 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; + octet = tvb_get_guint8(tvb, offset); + if (uil2_protocol == Q933_UIL2_USER_SPEC) { + proto_tree_add_text(tree, tvb, offset, 1, + "User-specified layer 2 protocol information: 0x%02X", + octet & 0x7F); + } else { + proto_tree_add_text(tree, tvb, offset, 1, + "Address inclusion: %s", + val_to_str(octet & 0x03, q933_address_inclusion_vals, + "Unknown (0x%02X)")); + } + 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_text(tree, tvb, offset, 1, + "User information layer 3 protocol: %s", + val_to_str(uil3_protocol, q933_uil3_vals, + "Unknown (0x%02X)")); + 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_text(tree, tvb, offset, 1, + "Mode: %s", + val_to_str(octet & 0x60, q933_mode_vals, + "Unknown (0x%02X)")); + 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_text(tree, tvb, offset, 1, + "Default packet size: %u", octet & 0x0F); + 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_text(tree, tvb, offset, 1, + "Packet window size: %u", octet & 0x7F); + offset += 1; + len -= 1; + break; + + case Q933_UIL3_USER_SPEC: + proto_tree_add_text(tree, tvb, offset, 1, + "Default packet size: %u octets", + 1 << (octet & 0x0F)); + offset += 1; + len -= 1; + break; + + case Q933_UIL3_TR_9577: + add_l3_info = (octet & 0x0F) << 4; + if (octet & Q933_IE_VL_EXTENSION) + goto l3_done; + if (len == 0) + return; + octet = tvb_get_guint8(tvb, offset + 1); + add_l3_info |= (octet & 0x0F); + proto_tree_add_text(tree, tvb, offset, 2, + "Additional layer 3 protocol information: %s", + val_to_str(add_l3_info, nlpid_vals, + "Unknown (0x%02X)")); + 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 nonexistant 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 } +}; + +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_text(tree, tvb, offset, + len, "Data: %s", + tvb_bytes_to_str(tvb, offset, len)); + 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_text(tree, tvb, offset, 1, + "Recommendation: %s", + val_to_str(octet & 0x7F, q933_cause_recommendation_vals, + "Unknown (0x%02X)")); + 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: + octet = tvb_get_guint8(tvb, offset); + proto_tree_add_text(tree, tvb, offset, 1, + "Network service: %s", + (octet & 0x80) ? "User" : "Provider"); + proto_tree_add_text(tree, tvb, offset, 1, + "%s", + (octet & 0x40) ? "Abnormal" : "Normal"); + proto_tree_add_text(tree, tvb, offset, 1, + "Condition: %s", + val_to_str(octet & 0x03, q933_cause_condition_vals, + "Unknown (0x%X)")); + break; + + case Q933_CAUSE_CALL_REJECTED: + rejection_reason = octet & 0x7C; + proto_tree_add_text(tree, tvb, offset, 1, + "Rejection reason: %s", + val_to_str(octet & 0x7C, q933_rejection_reason_vals, + "Unknown (0x%X)")); + proto_tree_add_text(tree, tvb, offset, 1, + "Condition: %s", + val_to_str(octet & 0x03, q933_cause_condition_vals, + "Unknown (0x%X)")); + offset += 1; + len -= 1; + + if (len == 0) + return; + switch (rejection_reason) { + + case Q933_REJ_USER_SPECIFIC: + proto_tree_add_text(tree, tvb, offset, len, + "User specific diagnostic: %s", + tvb_bytes_to_str(tvb, offset, len)); + break; + + case Q933_REJ_IE_MISSING: + proto_tree_add_text(tree, tvb, offset, 1, + "Missing information element: %s", + val_to_str(tvb_get_guint8(tvb, offset), q933_info_element_vals0, + "Unknown (0x%02X)")); + break; + + case Q933_REJ_IE_INSUFFICIENT: + proto_tree_add_text(tree, tvb, offset, 1, + "Insufficient information element: %s", + val_to_str(tvb_get_guint8(tvb, offset), q933_info_element_vals0, + "Unknown (0x%02X)")); + break; + + default: + proto_tree_add_text(tree, tvb, offset, len, + "Diagnostic: %s", + tvb_bytes_to_str(tvb, offset, len)); + 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_text(tree, tvb, offset, 1, + "Information element: %s", + val_to_str(tvb_get_guint8(tvb, offset), q933_info_element_vals0, + "Unknown (0x%02X)")); + 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_text(tree, tvb, offset, 1, + "Message type: %s", + val_to_str(tvb_get_guint8(tvb, offset), q933_message_type_vals, + "Unknown (0x%02X)")); + break; + + case Q933_CAUSE_REC_TIMER_EXP: + if (len < 3) + return; + proto_tree_add_text(tree, tvb, offset, 3, + "Timer: %.3s", tvb_get_ptr(tvb, offset, 3)); + break; + + default: + proto_tree_add_text(tree, tvb, offset, len, + "Diagnostics: %s", + tvb_bytes_to_str(tvb, offset, len)); + } +} + +/* + * 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_text(tree, tvb, offset, + len, "Data: %s", + tvb_bytes_to_str(tvb, offset, len)); + return; + } + proto_tree_add_text(tree, tvb, offset, 1, + "Call state: %s", + val_to_str(octet & 0x3F, q933_call_state_vals, + "Unknown (0x%02X)")); +} + +/* + * 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 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_text(tree, tvb, offset, 1, + "Interface %s identified", + (octet & Q933_INTERFACE_IDENTIFIED) ? "explicitly" : "implicitly"); + proto_tree_add_text(tree, tvb, offset, 1, + "%s interface", + (octet & Q933_NOT_BASIC_CHANNEL) ? "Not basic" : "Basic"); + proto_tree_add_text(tree, tvb, offset, 1, + "Indicated channel is %s", + (octet & 0x08) ? "required" : "preferred"); + proto_tree_add_text(tree, tvb, offset, 1, + "Indicated channel is %sthe D-channel", + (octet & 0x04) ? "" : "not "); + if (octet & Q933_NOT_BASIC_CHANNEL) { + proto_tree_add_text(tree, tvb, offset, 1, + "Channel selection: %s", + val_to_str(octet & 0x03, q933_not_basic_channel_selection_vals, + "Unknown (0x%X)")); + } else { + proto_tree_add_text(tree, tvb, offset, 1, + "Channel selection: %s", + val_to_str(octet & 0x03, q933_basic_channel_selection_vals, + NULL)); + } + 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_text(tree, tvb, identifier_offset, + identifier_len, "Interface identifier: %s", + bytes_to_str( + tvb_get_ptr(tvb, identifier_offset, identifier_len), + identifier_len)); + } + } + + 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_text(tree, tvb, offset, + len, "Data: %s", + tvb_bytes_to_str(tvb, offset, len)); + return; + } + proto_tree_add_text(tree, tvb, offset, 1, + "Channel is indicated by %s", + (octet & Q933_IS_SLOT_MAP) ? "slot map" : "number"); + proto_tree_add_text(tree, tvb, offset, 1, + "%s type: %s", + (octet & Q933_IS_SLOT_MAP) ? "Map element" : "Channel", + val_to_str(octet & 0x0F, q933_element_type_vals, + "Unknown (0x%02X)")); + + /* + * 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 } +}; + +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_text(tree, tvb, offset, + len, "Data: %s", + tvb_bytes_to_str(tvb, offset, len)); + return; + } + proto_tree_add_text(tree, tvb, offset, 1, + "Location: %s", + val_to_str(octet & 0x0F, q933_cause_location_vals, + "Unknown (0x%X)")); + offset += 1; + len -= 1; + + if (len == 0) + return; + octet = tvb_get_guint8(tvb, offset); + proto_tree_add_text(tree, tvb, offset, 1, + "Progress description: %s", + val_to_str(octet & 0x7F, q933_progress_description_vals, + "Unknown (0x%02X)")); +} + +/* + * 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_text(tree, tvb, offset, 1, + "Network identification length: %u", + netid_len); + offset += 1; + len -= 1; + if (netid_len != 0) { + if (len == 0) + return; + octet = tvb_get_guint8(tvb, offset); + proto_tree_add_text(tree, tvb, offset, 1, + "Type of network identification: %s", + val_to_str(octet & 0x70, q933_netid_type_vals, + "Unknown (0x%02X)")); + proto_tree_add_text(tree, tvb, offset, 1, + "Network identification plan: %s", + val_to_str(octet & 0x0F, q933_netid_plan_vals, + "Unknown (0x%02X)")); + offset += 1; + len -= 1; + netid_len--; + + if (len == 0) + return; + if (netid_len > len) + netid_len = len; + if (netid_len != 0) { + proto_tree_add_text(tree, tvb, offset, netid_len, + "Network identification: %s", + tvb_format_text(tvb, offset, netid_len)); + offset += netid_len; + len -= netid_len; + } + } + + /* + * Whatever is left is the network-specific facility + * specification. + */ + if (len == 0) + return; + proto_tree_add_text(tree, tvb, offset, + len, "Network-specific facility specification: %s", + tvb_bytes_to_str(tvb, offset, len)); +} + +static int +dissect_q933_guint16_value(tvbuff_t *tvb, int offset, int len, + proto_tree *tree, char *label) +{ + 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_text(tree, tvb, offset, value_len, "%s: %u ms", label, + value); + return value_len; + +past_end: + proto_tree_add_text(tree, tvb, offset, len, + "%s goes past end of information element", label); + return -1; + +bad_length: + proto_tree_add_text(tree, tvb, offset, len, "%s isn't 3 octets long", + label); + return -1; +} + +/* + * Dissect an End-to-end transit delay information element. + */ +static void +dissect_q933_e2e_transit_delay_ie(tvbuff_t *tvb, int offset, int len, + proto_tree *tree) +{ + int value_len; + + if (len == 0) + return; + value_len = dissect_q933_guint16_value(tvb, offset, len, tree, + "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, offset, len, tree, + "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, offset, len, tree, + "Maximum 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, int offset, int len, + proto_tree *tree) +{ + if (len == 0) + return; + dissect_q933_guint16_value(tvb, offset, len, tree, + "Transit delay"); +} + +static void +dissect_q933_pl_binary_parameters_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_text(tree, tvb, offset, 1, + "%s", + (octet & 0x04) ? "No request/request denied" : + "Request indicated/request accepted"); + proto_tree_add_text(tree, tvb, offset, 1, + "%s confirmation", + (octet & 0x02) ? "Link-by-link" : "End-to-end"); +} + +/* + * 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_text(tree, tvb, offset, 1, + "Reverse charging indication: %s", + val_to_str(tvb_get_guint8(tvb, offset) & 0x07, + q933_reverse_charging_indication_vals, "Unknown (0x%02X)")); +} + +/* + * 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; + octet = tvb_get_guint8(tvb, offset); + proto_tree_add_text(tree, tvb, offset, 1, + "Reason for redirection: %s", + val_to_str(octet & 0x0F, q933_redirection_reason_vals, + "Unknown (0x%X)")); + offset += 1; + len -= 1; + } + + if (len == 0) + return; + proto_tree_add_item(tree, hfindex, tvb, offset, len, FALSE); +} + +/* + * 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) +{ + guint8 octet; + + if (len == 0) + return; + octet = tvb_get_guint8(tvb, offset); + proto_tree_add_text(tree, tvb, offset, 1, + "Type of subaddress: %s", + val_to_str(octet & 0x70, q933_subaddress_type_vals, + "Unknown (0x%02X)")); + proto_tree_add_text(tree, tvb, offset, 1, + "Odd/even indicator: %s", + val_to_str(octet & 0x10, q933_odd_even_indicator_vals, + NULL)); + offset += 1; + len -= 1; + + if (len == 0) + return; + proto_tree_add_text(tree, tvb, offset, len, "Subaddress: %s", + tvb_bytes_to_str(tvb, offset, len)); +} + +/* + * 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 } +}; + +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_text(tree, tvb, offset, + len, "Data: %s", + tvb_bytes_to_str(tvb, offset, len)); + return; + } + + if (len == 0) + return; + octet = tvb_get_guint8(tvb, offset); + characteristics = octet & 0x7F; + proto_tree_add_text(tree, tvb, offset, 1, + "High layer characteristics identification: %s", + val_to_str(characteristics, q933_high_layer_characteristics_vals, + "Unknown (0x%02X)")); + offset += 1; + len -= 1; + + if (!(octet & Q933_IE_VL_EXTENSION)) { + if (len == 0) + return; + octet = tvb_get_guint8(tvb, offset); + if (characteristics == Q933_AUDIOVISUAL) { + proto_tree_add_text(tree, tvb, offset, 1, + "Extended audiovisual characteristics identification: %s", + val_to_str(octet & 0x7F, + q933_audiovisual_characteristics_vals, + "Unknown (0x%02X)")); + } else { + proto_tree_add_text(tree, tvb, offset, 1, + "Extended high layer characteristics identification: %s", + val_to_str(octet & 0x7F, + q933_high_layer_characteristics_vals, + "Unknown (0x%02X)")); + } + } +} + + +/* + * 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 } +}; + +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_text(tree, tvb, offset, 1, + "Protocol discriminator: %s", + val_to_str(octet, q933_protocol_discriminator_vals, + "Unknown (0x%02x)")); + offset += 1; + len -= 1; + + if (len == 0) + return; + switch (octet) { + + case Q933_PROTOCOL_DISCRIMINATOR_IA5: + proto_tree_add_text(tree, tvb, offset, len, "User information: %s", + tvb_format_text(tvb, offset, len)); + break; + + default: + proto_tree_add_text(tree, tvb, offset, len, "User information: %s", + tvb_bytes_to_str(tvb, offset, len)); + 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, + char *label) +{ + if (len != 0) { + proto_tree_add_text(tree, tvb, offset, len, "%s: %s", label, + tvb_format_text(tvb, offset, len)); + } +} + +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 void +dissect_q933(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + int offset = 0; + proto_tree *q933_tree = NULL; + proto_item *ti; + proto_tree *ie_tree = NULL; + guint8 call_ref_len; + guint8 call_ref[15]; + guint8 message_type; + guint8 info_element; + guint16 info_element_len; + int codeset, locked_codeset; + gboolean non_locking_shift; + + if (check_col(pinfo->cinfo, COL_PROTOCOL)) + col_set_str(pinfo->cinfo, COL_PROTOCOL, "Q.933"); + + if (tree) { + ti = proto_tree_add_item(tree, proto_q933, tvb, offset, -1, + FALSE); + 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); + if (q933_tree != NULL) { + 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); + if (check_col(pinfo->cinfo, COL_INFO)) { + col_add_str(pinfo->cinfo, COL_INFO, + val_to_str(message_type, q933_message_type_vals, + "Unknown message type (0x%02X)")); + } + if (q933_tree != NULL) + 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 */ + non_locking_shift = TRUE; + 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; + if (q933_tree != NULL) { + proto_tree_add_text(q933_tree, tvb, offset, 1, + "%s shift to codeset %u: %s", + (non_locking_shift ? "Non-locking" : "Locking"), + codeset, + val_to_str(codeset, q933_codeset_vals, + "Unknown (0x%02X)")); + } + 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: + if (q933_tree != NULL) { + proto_tree_add_text(q933_tree, tvb, offset, 1, + "Repeat indicator: %s", + val_to_str(info_element & Q933_IE_SO_IE_MASK, + q933_repeat_indication_vals, + "Unknown (0x%X)")); + } + break; + + default: + if (q933_tree != NULL) { + proto_tree_add_text(q933_tree, 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) { + ti = proto_tree_add_text(q933_tree, tvb, offset, + 1+1+info_element_len, "%s", + val_to_str(info_element, q933_info_element_vals[codeset], + "Unknown information element (0x%02X)")); + ie_tree = proto_item_add_subtree(ti, ett_q933_ie); + proto_tree_add_text(ie_tree, tvb, offset, 1, + "Information element: %s", + val_to_str(info_element, q933_info_element_vals[codeset], + "Unknown (0x%02X)")); + proto_tree_add_text(ie_tree, tvb, offset + 1, 1, + "Length: %u", info_element_len); + + switch ((codeset << 8) | info_element) { + + case CS0 | Q933_IE_SEGMENTED_MESSAGE: + dissect_q933_segmented_message_ie(tvb, + 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, + "Display information"); + break; + + case CS0 | Q933_IE_E2E_TRANSIT_DELAY: + dissect_q933_e2e_transit_delay_ie(tvb, + offset + 2, info_element_len, + ie_tree); + break; + + case CS0 | Q933_IE_TD_SELECTION_AND_INT: + dissect_q933_td_selection_and_int_ie( + tvb, 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; + + default: + proto_tree_add_text(ie_tree, tvb, + offset + 2, info_element_len, + "Data: %s", + bytes_to_str( + tvb_get_ptr(tvb, offset + 2, + info_element_len), + info_element_len)); + break; + } + } + offset += 1 + 1 + info_element_len; + codeset = locked_codeset; + } +} + +void +proto_register_q933(void) +{ + static hf_register_info hf[] = { + { &hf_q933_discriminator, + { "Protocol discriminator", "q933.disc", FT_UINT8, BASE_HEX, NULL, 0x0, + "", HFILL }}, + + { &hf_q933_call_ref_flag, + { "Call reference flag", "q933.call_ref_flag", FT_BOOLEAN, BASE_NONE, TFS(&tfs_call_ref_flag), 0x0, + "", HFILL }}, + + { &hf_q933_call_ref, + { "Call reference value", "q933.call_ref", FT_BYTES, BASE_HEX, NULL, 0x0, + "", HFILL }}, + + + { &hf_q933_coding_standard, + { "Coding standard", "q933.coding_standard", FT_UINT8, BASE_HEX, + VALS(q933_coding_standard_vals), 0x60,"", HFILL }}, + + { &hf_q933_information_transfer_capability, + { "Information transfer capability", "q933.information_transfer_capability", FT_UINT8, BASE_HEX, + VALS(q933_information_transfer_capability_vals), 0x1f,"", HFILL }}, + + { &hf_q933_transfer_mode, + { "Transfer mode", "q933.transfer_mode", FT_UINT8, BASE_HEX, + VALS(q933_transfer_mode_vals), 0x60,"", HFILL }}, + + { &hf_q933_uil1, + { "User information layer 1 protocol", "q933.uil1", FT_UINT8, BASE_HEX, + VALS(q933_uil1_vals), 0x1f,"", HFILL }}, + + { &hf_q933_call_ref_len, + { "Call reference value length", "q933.call_ref_len", FT_UINT8, BASE_DEC, NULL, 0x0, + "", HFILL }}, + + { &hf_q933_message_type, + { "Message type", "q933.message_type", FT_UINT8, BASE_HEX, VALS(q933_message_type_vals), 0x0, + "", HFILL }}, + + { &hf_q933_cause_location, + { "Cause location", "q933.cause_location", FT_UINT8, BASE_DEC, VALS(q933_cause_location_vals), 0x0f, + "", HFILL }}, + + { &hf_q933_cause_value, + { "Cause value", "q933.cause_value", FT_UINT8, BASE_DEC, VALS(q933_cause_code_vals), 0x7f, + "", HFILL }}, + + { &hf_q933_number_type, + { "Number type", "q933.number_type", FT_UINT8, BASE_HEX, VALS(q933_number_type_vals), 0x70, + "", HFILL }}, + + { &hf_q933_numbering_plan, + { "numbering plan", "q933.numbering_plan", FT_UINT8, BASE_HEX, VALS(q933_numbering_plan_vals), 0x0f, + "", HFILL }}, + + { &hf_q933_screening_ind, + { "Screening indicator", "q933.screening_ind", FT_UINT8, BASE_HEX, VALS(q933_screening_indicator_vals), 0x03, + "", HFILL }}, + + { &hf_q933_presentation_ind, + { "Presentation indicator", "q933.presentation_ind", FT_UINT8, BASE_HEX, VALS(q933_presentation_indicator_vals), 0x60, + "", HFILL }}, + + { &hf_q933_extension_ind, + { "Extension indicator", "q933.extension_ind", + FT_BOOLEAN, 8, TFS(&q933_extension_ind_value), 0x80, + "", HFILL }}, + + { &hf_q933_calling_party_number, + { "Calling party number digits", "q933.calling_party_number.digits", FT_STRING, BASE_NONE, NULL, 0x0, + "", HFILL }}, + + { &hf_q933_called_party_number, + { "Called party number digits", "q933.called_party_number.digits", FT_STRING, BASE_NONE, NULL, 0x0, + "", HFILL }}, + + { &hf_q933_connected_number, + { "Connected party number digits", "q933.connected_number.digits", FT_STRING, BASE_NONE, NULL, 0x0, + "", HFILL }}, + + { &hf_q933_redirecting_number, + { "Redirecting party number digits", "q933.redirecting_number.digits", FT_STRING, BASE_NONE, NULL, 0x0, + "", HFILL }}, + }; + static gint *ett[] = { + &ett_q933, + &ett_q933_ie, + }; + + 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)); + + register_dissector("q933", dissect_q933, proto_q933); +} + +void +proto_reg_handoff_q933(void) +{ + dissector_handle_t q933_handle; + + q933_handle = create_dissector_handle(dissect_q933, proto_q933); + dissector_add("fr.osinl", NLPID_Q_933, q933_handle); +} |