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wireshark/packet-sccp.c

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/* packet-sccp.c
* Routines for Signalling Connection Control Part (SCCP) dissection
*
* It is hopefully compliant to:
* ANSI T1.112.3-1996
* ITU-T Q.713 7/1996
* YDN 038-1997 (Chinese ITU variant)
*
* Copyright 2002, Jeff Morriss <jeff.morriss[AT]ulticom.com>
*
* $Id: packet-sccp.c,v 1.20 2004/01/08 20:19:03 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* Copyright 1998 Gerald Combs
*
* Copied from packet-m2pa.c
*
* 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 <stdlib.h>
#include <string.h>
#include <glib.h>
#ifdef NEED_SNPRINTF_H
#include "snprintf.h"
#endif
#include <epan/packet.h>
#include "packet-mtp3.h"
#include "prefs.h"
#define SCCP_SI 3
#define MESSAGE_TYPE_OFFSET 0
#define MESSAGE_TYPE_LENGTH 1
#define POINTER_LENGTH 1
#define POINTER_LENGTH_LONG 2
#define MESSAGE_TYPE_CR 0x01
#define MESSAGE_TYPE_CC 0x02
#define MESSAGE_TYPE_CREF 0x03
#define MESSAGE_TYPE_RLSD 0x04
#define MESSAGE_TYPE_RLC 0x05
#define MESSAGE_TYPE_DT1 0x06
#define MESSAGE_TYPE_DT2 0x07
#define MESSAGE_TYPE_AK 0x08
#define MESSAGE_TYPE_UDT 0x09
#define MESSAGE_TYPE_UDTS 0x0a
#define MESSAGE_TYPE_ED 0x0b
#define MESSAGE_TYPE_EA 0x0c
#define MESSAGE_TYPE_RSR 0x0d
#define MESSAGE_TYPE_RSC 0x0e
#define MESSAGE_TYPE_ERR 0x0f
#define MESSAGE_TYPE_IT 0x10
#define MESSAGE_TYPE_XUDT 0x11
#define MESSAGE_TYPE_XUDTS 0x12
/* The below 2 are ITU only */
#define MESSAGE_TYPE_LUDT 0x13
#define MESSAGE_TYPE_LUDTS 0x14
/* Same as below but with names typed out */
static const value_string sccp_message_type_values[] = {
{ MESSAGE_TYPE_CR, "Connection Request" },
{ MESSAGE_TYPE_CC, "Connection Confirm" },
{ MESSAGE_TYPE_CREF, "Connection Refused" },
{ MESSAGE_TYPE_RLSD, "Released" },
{ MESSAGE_TYPE_RLC, "Release Complete" },
{ MESSAGE_TYPE_DT1, "Data Form 1" },
{ MESSAGE_TYPE_DT2, "Data Form 2" },
{ MESSAGE_TYPE_AK, "Data Acknowledgement" },
{ MESSAGE_TYPE_UDT, "Unitdata" },
{ MESSAGE_TYPE_UDTS, "Unitdata Service" },
{ MESSAGE_TYPE_ED, "Expedited Data" },
{ MESSAGE_TYPE_EA, "Expedited Data Acknowledgement" },
{ MESSAGE_TYPE_RSR, "Reset Request" },
{ MESSAGE_TYPE_RSC, "Reset Confirmation" },
{ MESSAGE_TYPE_ERR, "Error" },
{ MESSAGE_TYPE_IT, "Inactivity Timer" },
{ MESSAGE_TYPE_XUDT, "Extended Unitdata" },
{ MESSAGE_TYPE_XUDTS, "Extended Unitdata Service" },
{ MESSAGE_TYPE_LUDT, "Long Unitdata (ITU)" },
{ MESSAGE_TYPE_LUDTS, "Long Unitdata Service (ITU)" },
{ 0, NULL } };
/* Same as above but in acronym form (for the Info column) */
static const value_string sccp_message_type_acro_values[] = {
{ MESSAGE_TYPE_CR, "CR" },
{ MESSAGE_TYPE_CC, "CC" },
{ MESSAGE_TYPE_CREF, "CREF" },
{ MESSAGE_TYPE_RLSD, "RLSD" },
{ MESSAGE_TYPE_RLC, "RLC" },
{ MESSAGE_TYPE_DT1, "DT1" },
{ MESSAGE_TYPE_DT2, "DT2" },
{ MESSAGE_TYPE_AK, "AK" },
{ MESSAGE_TYPE_UDT, "UDT" },
{ MESSAGE_TYPE_UDTS, "UDTS" },
{ MESSAGE_TYPE_ED, "ED" },
{ MESSAGE_TYPE_EA, "EA" },
{ MESSAGE_TYPE_RSR, "RSR" },
{ MESSAGE_TYPE_RSC, "RSC" },
{ MESSAGE_TYPE_ERR, "ERR" },
{ MESSAGE_TYPE_IT, "IT" },
{ MESSAGE_TYPE_XUDT, "XUDT" },
{ MESSAGE_TYPE_XUDTS, "XUDTS" },
{ MESSAGE_TYPE_LUDT, "LUDT" },
{ MESSAGE_TYPE_LUDTS, "LUDTS" },
{ 0, NULL } };
#define PARAMETER_LENGTH_LENGTH 1
#define PARAMETER_LONG_DATA_LENGTH_LENGTH 2
#define PARAMETER_TYPE_LENGTH 1
#define PARAMETER_END_OF_OPTIONAL_PARAMETERS 0x00
#define PARAMETER_DESTINATION_LOCAL_REFERENCE 0x01
#define PARAMETER_SOURCE_LOCAL_REFERENCE 0x02
#define PARAMETER_CALLED_PARTY_ADDRESS 0x03
#define PARAMETER_CALLING_PARTY_ADDRESS 0x04
#define PARAMETER_CLASS 0x05
#define PARAMETER_SEGMENTING_REASSEMBLING 0x06
#define PARAMETER_RECEIVE_SEQUENCE_NUMBER 0x07
#define PARAMETER_SEQUENCING_SEGMENTING 0x08
#define PARAMETER_CREDIT 0x09
#define PARAMETER_RELEASE_CAUSE 0x0a
#define PARAMETER_RETURN_CAUSE 0x0b
#define PARAMETER_RESET_CAUSE 0x0c
#define PARAMETER_ERROR_CAUSE 0x0d
#define PARAMETER_REFUSAL_CAUSE 0x0e
#define PARAMETER_DATA 0x0f
#define PARAMETER_SEGMENTATION 0x10
#define PARAMETER_HOP_COUNTER 0x11
/* The below 2 are ITU only */
#define PARAMETER_IMPORTANCE 0x12
#define PARAMETER_LONG_DATA 0x13
/* ISNI is ANSI only */
#define PARAMETER_ISNI 0xfa
static const value_string sccp_parameter_values[] = {
{ PARAMETER_END_OF_OPTIONAL_PARAMETERS, "End of Optional Parameters" },
{ PARAMETER_DESTINATION_LOCAL_REFERENCE, "Destination Local Reference" },
{ PARAMETER_SOURCE_LOCAL_REFERENCE, "Source Local Reference" },
{ PARAMETER_CALLED_PARTY_ADDRESS, "Called Party Address" },
{ PARAMETER_CALLING_PARTY_ADDRESS, "Calling Party Address" },
{ PARAMETER_CLASS, "Protocol Class" },
{ PARAMETER_SEGMENTING_REASSEMBLING, "Segmenting/Reassembling" },
{ PARAMETER_RECEIVE_SEQUENCE_NUMBER, "Receive Sequence Number" },
{ PARAMETER_SEQUENCING_SEGMENTING, "Sequencing/Segmenting" },
{ PARAMETER_CREDIT, "Credit" },
{ PARAMETER_RELEASE_CAUSE, "Release Cause" },
{ PARAMETER_RETURN_CAUSE, "Return Cause" },
{ PARAMETER_RESET_CAUSE, "Reset Cause" },
{ PARAMETER_ERROR_CAUSE, "Error Cause" },
{ PARAMETER_REFUSAL_CAUSE, "Refusal Cause" },
{ PARAMETER_DATA, "Data" },
{ PARAMETER_SEGMENTATION, "Segmentation" },
{ PARAMETER_HOP_COUNTER, "Hop Counter" },
{ PARAMETER_IMPORTANCE, "Importance (ITU)" },
{ PARAMETER_LONG_DATA, "Long Data (ITU)" },
{ PARAMETER_ISNI, "Intermediate Signaling Network Identification (ANSI)" },
{ 0, NULL } };
#define END_OF_OPTIONAL_PARAMETERS_LENGTH 1
#define DESTINATION_LOCAL_REFERENCE_LENGTH 3
#define SOURCE_LOCAL_REFERENCE_LENGTH 3
#define PROTOCOL_CLASS_LENGTH 1
#define RECEIVE_SEQUENCE_NUMBER_LENGTH 1
#define CREDIT_LENGTH 1
#define RELEASE_CAUSE_LENGTH 1
#define RETURN_CAUSE_LENGTH 1
#define RESET_CAUSE_LENGTH 1
#define ERROR_CAUSE_LENGTH 1
#define REFUSAL_CAUSE_LENGTH 1
#define HOP_COUNTER_LENGTH 1
#define IMPORTANCE_LENGTH 1
/* Parts of the Called and Calling Address parameters */
/* Address Indicator */
#define ADDRESS_INDICATOR_LENGTH 1
#define ITU_RESERVED_MASK 0x80
#define ANSI_NATIONAL_MASK 0x80
#define ROUTING_INDICATOR_MASK 0x40
#define GTI_MASK 0x3C
#define GTI_SHIFT 2
#define ITU_SSN_INDICATOR_MASK 0x02
#define ITU_PC_INDICATOR_MASK 0x01
#define ANSI_PC_INDICATOR_MASK 0x02
#define ANSI_SSN_INDICATOR_MASK 0x01
static const value_string sccp_national_indicator_values[] = {
{ 0x0, "Address coded to International standard" },
{ 0x1, "Address coded to National standard" },
{ 0, NULL } };
static const value_string sccp_routing_indicator_values[] = {
{ 0x0, "Route on GT" },
{ 0x1, "Route on SSN" },
{ 0, NULL } };
#define AI_GTI_NO_GT 0x0
#define ITU_AI_GTI_NAI 0x1
#define AI_GTI_TT 0x2
#define ITU_AI_GTI_TT_NP_ES 0x3
#define ITU_AI_GTI_TT_NP_ES_NAI 0x4
static const value_string sccp_itu_global_title_indicator_values[] = {
{ AI_GTI_NO_GT, "No Global Title" },
{ ITU_AI_GTI_NAI, "Nature of Address Indicator only" },
{ AI_GTI_TT, "Translation Type only" },
{ ITU_AI_GTI_TT_NP_ES, "Translation Type, Numbering Plan, and Encoding Scheme included" },
{ ITU_AI_GTI_TT_NP_ES_NAI, "Translation Type, Numbering Plan, Encoding Scheme, and Nature of Address Indicator included" },
{ 0, NULL } };
/* #define AI_GTI_NO_GT 0x0 */
#define ANSI_AI_GTI_TT_NP_ES 0x1
/* #define AI_GTI_TT 0x2 */
static const value_string sccp_ansi_global_title_indicator_values[] = {
{ AI_GTI_NO_GT, "No Global Title" },
{ ANSI_AI_GTI_TT_NP_ES, "Translation Type, Numbering Plan, and Encoding Scheme included" },
{ AI_GTI_TT, "Translation Type only" },
{ 0, NULL } };
static const value_string sccp_ai_pci_values[] = {
{ 0x1, "Point Code present" },
{ 0x0, "Point Code not present" },
{ 0, NULL } };
static const value_string sccp_ai_ssni_values[] = {
{ 0x1, "SSN present" },
{ 0x0, "SSN not present" },
{ 0, NULL } };
#define ADDRESS_SSN_LENGTH 1
#define INVALID_SSN 0xff
static const value_string sccp_ssn_values[] = {
{ 0x00, "SSN not known/not used" },
{ 0x01, "SCCP management" },
{ 0x02, "Reserved for ITU-T allocation" },
{ 0x03, "ISDN User Part" },
{ 0x04, "OMAP (Operation, Maintenance, and Administration Part)" },
{ 0x05, "MAP (Mobile Application Part)" },
{ 0x06, "HLR (Home Location Register)" },
{ 0x07, "VLR (Visitor Location Register)" },
{ 0x08, "MSC (Mobile Switching Center)" },
{ 0x09, "EIC/EIR (Equipment Identifier Center/Equipment Identification Register)" },
{ 0x0a, "AUC/AC (Authentication Center)" },
{ 0x0b, "ISDN supplementary services (ITU only)" },
{ 0x0c, "Reserved for international use (ITU only)" },
{ 0x0d, "Broadband ISDN edge-to-edge applications (ITU only)" },
{ 0x0e, "TC test responder (ITU only)" },
{ 0x8e, "RANAP" },
{ 0xfc, "IOS" },
{ 0xfe, "BSSAP/BSAP" },
{ 0, NULL } };
/* * * * * * * * * * * * * * * * *
* Global Title: ITU GTI == 0001 *
* * * * * * * * * * * * * * * * */
#define GT_NAI_MASK 0x7F
#define GT_NAI_LENGTH 1
static const value_string sccp_nai_values[] = {
{ 0x00, "NAI unknown" },
{ 0x01, "Subscriber Number" },
{ 0x02, "Reserved for national use" },
{ 0x03, "National significant number" },
{ 0x04, "International number" },
{ 0, NULL } };
#define GT_OE_MASK 0x80
#define GT_OE_EVEN 0
#define GT_OE_ODD 1
static const value_string sccp_oe_values[] = {
{ GT_OE_EVEN, "Even number of address signals" },
{ GT_OE_ODD, "Odd number of address signals" },
{ 0, NULL } };
#define GT_SIGNAL_LENGTH 1
#define GT_ODD_SIGNAL_MASK 0x0f
#define GT_EVEN_SIGNAL_MASK 0xf0
#define GT_EVEN_SIGNAL_SHIFT 4
#define GT_MAX_SIGNALS 32
static const value_string sccp_address_signal_values[] = {
{ 0, "0" },
{ 1, "1" },
{ 2, "2" },
{ 3, "3" },
{ 4, "4" },
{ 5, "5" },
{ 6, "6" },
{ 7, "7" },
{ 8, "8" },
{ 9, "9" },
{ 10, "(spare)" },
{ 11, "11" },
{ 12, "12" },
{ 13, "(spare)" },
{ 14, "(spare)" },
{ 15, "ST" },
{ 0, NULL } };
/* * * * * * * * * * * * * * * * * * * * *
* Global Title: ITU and ANSI GTI == 0010 *
* * * * * * * * * * * * * * * * * * * * */
#define GT_TT_LENGTH 1
/* * * * * * * * * * * * * * * * * * * * * * * * * *
* Global Title: ITU GTI == 0011, ANSI GTI == 0001 *
* * * * * * * * * * * * * * * * * * * * * * * * * */
#define GT_NP_MASK 0xf0
#define GT_NP_ES_LENGTH 1
static const value_string sccp_np_values[] = {
{ 0x0, "Unknown" },
{ 0x1, "ISDN/telephony" },
{ 0x2, "Generic (ITU)/Reserved (ANSI)" },
{ 0x3, "Data" },
{ 0x4, "Telex" },
{ 0x5, "Maritime mobile" },
{ 0x6, "Land mobile" },
{ 0x7, "ISDN/mobile" },
{ 0xe, "Private network or network-specific" },
{ 0xf, "Reserved" },
{ 0, NULL } };
#define GT_ES_MASK 0x0f
#define GT_ES_UNKNOWN 0x0
#define GT_ES_BCD_ODD 0x1
#define GT_ES_BCD_EVEN 0x2
#define GT_ES_NATIONAL 0x3
#define GT_ES_RESERVED 0xf
static const value_string sccp_es_values[] = {
{ GT_ES_UNKNOWN, "Unknown" },
{ GT_ES_BCD_ODD, "BCD, odd number of digits" },
{ GT_ES_BCD_EVEN, "BCD, even number of digits" },
{ GT_ES_NATIONAL, "National specific" },
{ GT_ES_RESERVED, "Reserved (ITU)/Spare (ANSI)" },
{ 0, NULL } };
/* Address signals above */
/* * * * * * * * * * * * * * * * *
* Global Title: ITU GTI == 0100 *
* * * * * * * * * * * * * * * * */
/* NP above */
/* ES above */
/* NAI above */
/* Address signals above */
#define CLASS_CLASS_MASK 0xf
#define CLASS_SPARE_HANDLING_MASK 0xf0
static const value_string sccp_class_handling_values [] = {
{ 0x0, "No special options" },
{ 0x8, "Return message on error" },
{ 0, NULL } };
#define SEGMENTING_REASSEMBLING_LENGTH 1
#define SEGMENTING_REASSEMBLING_MASK 0x01
#define NO_MORE_DATA 0
#define MORE_DATA 1
/* This is also used by sequencing-segmenting parameter */
static const value_string sccp_segmenting_reassembling_values [] = {
{ NO_MORE_DATA, "No more data" },
{ MORE_DATA, "More data" },
{ 0, NULL } };
#define RECEIVE_SEQUENCE_NUMBER_LENGTH 1
#define RSN_MASK 0xfe
#define SEQUENCING_SEGMENTING_LENGTH 2
#define SEQUENCING_SEGMENTING_SSN_LENGTH 1
#define SEQUENCING_SEGMENTING_RSN_LENGTH 1
#define SEND_SEQUENCE_NUMBER_MASK 0xfe
#define RECEIVE_SEQUENCE_NUMBER_MASK 0xfe
#define SEQUENCING_SEGMENTING_MORE_MASK 0x01
#define CREDIT_LENGTH 1
#define RELEASE_CAUSE_LENGTH 1
static const value_string sccp_release_cause_values [] = {
{ 0x00, "End user originated" },
{ 0x01, "End user congestion" },
{ 0x02, "End user failure" },
{ 0x03, "SCCP user originated" },
{ 0x04, "Remote procedure error" },
{ 0x05, "Inconsistent connection data" },
{ 0x06, "Access failure" },
{ 0x07, "Access congestion" },
{ 0x08, "Subsystem failure" },
{ 0x09, "Subsystem congestion" },
{ 0x0a, "MTP failure" },
{ 0x0b, "Netowrk congestion" },
{ 0x0c, "Expiration of reset timer" },
{ 0x0d, "Expiration of receive inactivity timer" },
{ 0x0e, "Reserved" },
{ 0x0f, "Unqualified" },
{ 0x10, "SCCP failure (ITU only)" },
{ 0, NULL } };
#define RETURN_CAUSE_LENGTH 1
static const value_string sccp_return_cause_values [] = {
{ 0x00, "No translation for an address of such nature" },
{ 0x01, "No translation for this specific address" },
{ 0x02, "Subsystem congestion" },
{ 0x03, "Subsystem failure" },
{ 0x04, "Unequipped failure" },
{ 0x05, "MTP failure" },
{ 0x06, "Network congestion" },
{ 0x07, "Unqualified" },
{ 0x08, "Error in message transport" },
{ 0x09, "Error in local processing" },
{ 0x0a, "Destination cannot perform reassembly" },
{ 0x0b, "SCCP failure" },
{ 0x0c, "Hop counter violation" },
{ 0x0d, "Segmentation not supported (ITU only)" },
{ 0x0e, "Segmentation failure (ITU only)" },
{ 0xf9, "Invalid ISNI routing request (ANSI only)"},
{ 0xfa, "Unauthorized message (ANSI only)" },
{ 0xfb, "Message incompatibility (ANSI only)" },
{ 0xfc, "Cannot perform ISNI constrained routing (ANSI only)" },
{ 0xfd, "Unable to perform ISNI identification (ANSI only)" },
{ 0, NULL } };
#define RESET_CAUSE_LENGTH 1
static const value_string sccp_reset_cause_values [] = {
{ 0x00, "End user originated" },
{ 0x01, "SCCP user originated" },
{ 0x02, "Message out of order - incorrect send sequence number" },
{ 0x03, "Message out of order - incorrect receive sequence number" },
{ 0x04, "Remote procedure error - message out of window" },
{ 0x05, "Remote procedure error - incorrect send sequence number after (re)initialization" },
{ 0x06, "Remote procedure error - general" },
{ 0x07, "Remote end user operational" },
{ 0x08, "Network operational" },
{ 0x09, "Access operational" },
{ 0x0a, "Network congestion" },
{ 0x0b, "Reserved (ITU)/Not obtainable (ANSI)" },
{ 0x0c, "Unqualified" },
{ 0, NULL } };
#define ERROR_CAUSE_LENGTH 1
static const value_string sccp_error_cause_values [] = {
{ 0x00, "Local Reference Number (LRN) mismatch - unassigned destination LRN" },
{ 0x01, "Local Reference Number (LRN) mismatch - inconsistent source LRN" },
{ 0x02, "Point code mismatch" },
{ 0x03, "Service class mismatch" },
{ 0x04, "Unqualified" },
{ 0, NULL } };
#define REFUSAL_CAUSE_LENGTH 1
static const value_string sccp_refusal_cause_values [] = {
{ 0x00, "End user originated" },
{ 0x01, "End user congestion" },
{ 0x02, "End user failure" },
{ 0x03, "SCCP user originated" },
{ 0x04, "Destination address unknown" },
{ 0x05, "Destination inaccessible" },
{ 0x06, "Network resource - QOS not available/non-transient" },
{ 0x07, "Network resource - QOS not available/transient" },
{ 0x08, "Access failure" },
{ 0x09, "Access congestion" },
{ 0x0a, "Subsystem failure" },
{ 0x0b, "Subsystem congestion" },
{ 0x0c, "Expiration of connection establishment timer" },
{ 0x0d, "Incompatible user data" },
{ 0x0e, "Reserved" },
{ 0x0f, "Unqualified" },
{ 0x10, "Hop counter violation" },
{ 0x11, "SCCP failure (ITU only)" },
{ 0x12, "No translation for an address of such nature" },
{ 0x13, "Unequipped user" },
{ 0, NULL } };
#define SEGMENTATION_LENGTH 4
#define SEGMENTATION_FIRST_SEGMENT_MASK 0x80
#define SEGMENTATION_CLASS_MASK 0x40
#define SEGMENTATION_SPARE_MASK 0x30
#define SEGMENTATION_REMAINING_MASK 0x0f
static const value_string sccp_segmentation_first_segment_values [] = {
{ 1, "First segment" },
{ 0, "Not first segment" },
{ 0, NULL } };
static const value_string sccp_segmentation_class_values [] = {
{ 0, "Class 0 selected" },
{ 1, "Class 1 selected" },
{ 0, NULL } };
#define HOP_COUNTER_LENGTH 1
#define IMPORTANCE_LENGTH 1
#define IMPORTANCE_IMPORTANCE_MASK 0x7
#define ANSI_ISNI_ROUTING_CONTROL_LENGTH 1
#define ANSI_ISNI_MI_MASK 0x01
#define ANSI_ISNI_IRI_MASK 0x06
#define ANSI_ISNI_RES_MASK 0x08
#define ANSI_ISNI_TI_MASK 0x10
#define ANSI_ISNI_TI_SHIFT 4
#define ANSI_ISNI_COUNTER_MASK 0xe0
#define ANSI_ISNI_NETSPEC_MASK 0x03
static const value_string sccp_isni_mark_for_id_values [] = {
{ 0x0, "Do not identify networks" },
{ 0x1, "Identify networks" },
{ 0, NULL } };
static const value_string sccp_isni_iri_values [] = {
{ 0x0, "Neither constrained nor suggested ISNI routing" },
{ 0x1, "Constrained ISNI routing" },
{ 0x2, "Reserved for suggested ISNI routing" },
{ 0x3, "Spare" },
{ 0, NULL } };
#define ANSI_ISNI_TYPE_0 0x0
#define ANSI_ISNI_TYPE_1 0x1
static const value_string sccp_isni_ti_values [] = {
{ ANSI_ISNI_TYPE_0, "Type zero ISNI parameter format" },
{ ANSI_ISNI_TYPE_1, "Type one ISNI parameter format" },
{ 0, NULL } };
/* Initialize the protocol and registered fields */
static int proto_sccp = -1;
static int hf_sccp_message_type = -1;
static int hf_sccp_variable_pointer1 = -1;
static int hf_sccp_variable_pointer2 = -1;
static int hf_sccp_variable_pointer3 = -1;
static int hf_sccp_optional_pointer = -1;
static int hf_sccp_ssn = -1;
static int hf_sccp_gt_digits = -1;
/* Called Party address */
static int hf_sccp_called_national_indicator = -1;
static int hf_sccp_called_routing_indicator = -1;
static int hf_sccp_called_itu_global_title_indicator = -1;
static int hf_sccp_called_ansi_global_title_indicator = -1;
static int hf_sccp_called_itu_ssn_indicator = -1;
static int hf_sccp_called_itu_point_code_indicator = -1;
static int hf_sccp_called_ansi_ssn_indicator = -1;
static int hf_sccp_called_ansi_point_code_indicator = -1;
static int hf_sccp_called_ssn = -1;
static int hf_sccp_called_pc_member = -1;
static int hf_sccp_called_pc_cluster = -1;
static int hf_sccp_called_pc_network = -1;
static int hf_sccp_called_ansi_pc = -1;
static int hf_sccp_called_chinese_pc = -1;
static int hf_sccp_called_itu_pc = -1;
static int hf_sccp_called_gt_nai = -1;
static int hf_sccp_called_gt_oe = -1;
static int hf_sccp_called_gt_tt = -1;
static int hf_sccp_called_gt_np = -1;
static int hf_sccp_called_gt_es = -1;
static int hf_sccp_called_gt_digits = -1;
/* Calling party address */
static int hf_sccp_calling_national_indicator = -1;
static int hf_sccp_calling_routing_indicator = -1;
static int hf_sccp_calling_itu_global_title_indicator = -1;
static int hf_sccp_calling_ansi_global_title_indicator = -1;
static int hf_sccp_calling_itu_ssn_indicator = -1;
static int hf_sccp_calling_itu_point_code_indicator = -1;
static int hf_sccp_calling_ansi_ssn_indicator = -1;
static int hf_sccp_calling_ansi_point_code_indicator = -1;
static int hf_sccp_calling_ssn = -1;
static int hf_sccp_calling_pc_member = -1;
static int hf_sccp_calling_pc_cluster = -1;
static int hf_sccp_calling_pc_network = -1;
static int hf_sccp_calling_ansi_pc = -1;
static int hf_sccp_calling_chinese_pc = -1;
static int hf_sccp_calling_itu_pc = -1;
static int hf_sccp_calling_gt_nai = -1;
static int hf_sccp_calling_gt_oe = -1;
static int hf_sccp_calling_gt_tt = -1;
static int hf_sccp_calling_gt_np = -1;
static int hf_sccp_calling_gt_es = -1;
static int hf_sccp_calling_gt_digits = -1;
/* Other parameter values */
static int hf_sccp_dlr = -1;
static int hf_sccp_slr = -1;
static int hf_sccp_class = -1;
static int hf_sccp_handling = -1;
static int hf_sccp_more = -1;
static int hf_sccp_rsn = -1;
static int hf_sccp_sequencing_segmenting_ssn = -1;
static int hf_sccp_sequencing_segmenting_rsn = -1;
static int hf_sccp_sequencing_segmenting_more = -1;
static int hf_sccp_credit = -1;
static int hf_sccp_release_cause = -1;
static int hf_sccp_return_cause = -1;
static int hf_sccp_reset_cause = -1;
static int hf_sccp_error_cause = -1;
static int hf_sccp_refusal_cause = -1;
static int hf_sccp_segmentation_first = -1;
static int hf_sccp_segmentation_class = -1;
static int hf_sccp_segmentation_remaining = -1;
static int hf_sccp_segmentation_slr = -1;
static int hf_sccp_hop_counter = -1;
static int hf_sccp_importance = -1;
static int hf_sccp_ansi_isni_mi = -1;
static int hf_sccp_ansi_isni_iri = -1;
static int hf_sccp_ansi_isni_ti = -1;
static int hf_sccp_ansi_isni_netspec = -1;
static int hf_sccp_ansi_isni_counter = -1;
/* Initialize the subtree pointers */
static gint ett_sccp = -1;
static gint ett_sccp_called = -1;
static gint ett_sccp_called_ai = -1;
static gint ett_sccp_called_pc = -1;
static gint ett_sccp_called_gt = -1;
static gint ett_sccp_calling = -1;
static gint ett_sccp_calling_ai = -1;
static gint ett_sccp_calling_pc = -1;
static gint ett_sccp_calling_gt = -1;
static gint ett_sccp_sequencing_segmenting = -1;
static gint ett_sccp_segmentation = -1;
static gint ett_sccp_ansi_isni_routing_control = -1;
/*
* Here are the global variables associated with
* the various user definable characteristics of the dissection
*/
static guint32 sccp_source_pc_global = 0;
static gboolean sccp_show_length = FALSE;
static module_t *sccp_module;
static heur_dissector_list_t heur_subdissector_list;
/* Keep track of SSN value of current message so if/when we get to the data
* parameter, we can call appropriate sub-dissector. TODO: can this info
* be stored elsewhere?
*/
static guint8 called_ssn = INVALID_SSN;
static guint8 calling_ssn = INVALID_SSN;
static dissector_handle_t data_handle;
static dissector_table_t sccp_ssn_dissector_table;
static void
dissect_sccp_unknown_message(tvbuff_t *message_tvb, proto_tree *sccp_tree)
{
guint32 message_length;
message_length = tvb_length(message_tvb);
proto_tree_add_text(sccp_tree, message_tvb, 0, message_length,
"Unknown message (%u byte%s)",
message_length, plurality(message_length, "", "s"));
}
static void
dissect_sccp_unknown_param(tvbuff_t *tvb, proto_tree *tree, guint8 type, guint length)
{
proto_tree_add_text(tree, tvb, 0, length, "Unknown parameter 0x%x (%u byte%s)",
type, length, plurality(length, "", "s"));
}
static void
dissect_sccp_dlr_param(tvbuff_t *tvb, proto_tree *tree, guint length)
{
guint32 reference;
reference = tvb_get_letoh24(tvb, 0);
proto_tree_add_uint(tree, hf_sccp_dlr, tvb, 0, length, reference);
}
static void
dissect_sccp_slr_param(tvbuff_t *tvb, proto_tree *tree, guint length)
{
guint32 reference;
reference = tvb_get_letoh24(tvb, 0);
proto_tree_add_uint(tree, hf_sccp_slr, tvb, 0, length, reference);
}
static void
dissect_sccp_gt_address_information(tvbuff_t *tvb, proto_tree *tree,
guint length, gboolean even_length,
gboolean called)
{
guint offset = 0;
guint8 odd_signal, even_signal = 0x0f;
char gt_digits[GT_MAX_SIGNALS] = { 0 };
while(offset < length)
{
odd_signal = tvb_get_guint8(tvb, offset) & GT_ODD_SIGNAL_MASK;
even_signal = tvb_get_guint8(tvb, offset) & GT_EVEN_SIGNAL_MASK;
even_signal >>= GT_EVEN_SIGNAL_SHIFT;
strcat(gt_digits, val_to_str(odd_signal, sccp_address_signal_values,
"Unknown"));
/* If the last signal is NOT filler */
if (offset != (length - 1) || even_length == TRUE)
strcat(gt_digits, val_to_str(even_signal, sccp_address_signal_values,
"Unknown"));
offset += GT_SIGNAL_LENGTH;
}
proto_tree_add_string_format(tree, called ? hf_sccp_called_gt_digits
: hf_sccp_calling_gt_digits,
tvb, 0, length,
gt_digits,
"Address information (digits): %s", gt_digits);
proto_tree_add_string_hidden(tree, called ? hf_sccp_gt_digits
: hf_sccp_gt_digits,
tvb, 0, length,
gt_digits);
}
static void
dissect_sccp_global_title(tvbuff_t *tvb, proto_tree *tree, guint length,
guint8 gti, gboolean called)
{
proto_item *gt_item = 0;
proto_tree *gt_tree = 0;
tvbuff_t *signals_tvb;
guint offset = 0;
guint8 odd_even, nai, tt, np, es;
gboolean even = TRUE;
/* Shift GTI to where we can work with it */
gti >>= GTI_SHIFT;
gt_item = proto_tree_add_text(tree, tvb, offset, length,
"Global Title 0x%x (%u byte%s)",
gti, length, plurality(length,"", "s"));
gt_tree = proto_item_add_subtree(gt_item, called ? ett_sccp_called_gt
: ett_sccp_calling_gt);
/* Decode Transation Type (if present) */
switch (gti) {
case AI_GTI_TT:
/* Protocol doesn't tell us, so we ASSUME even... */
even = TRUE;
/* Fall through */
case ITU_AI_GTI_TT_NP_ES:
case ITU_AI_GTI_TT_NP_ES_NAI:
case ANSI_AI_GTI_TT_NP_ES:
tt = tvb_get_guint8(tvb, offset);
proto_tree_add_uint(gt_tree, called ? hf_sccp_called_gt_tt
: hf_sccp_calling_gt_tt,
tvb, offset, GT_TT_LENGTH, tt);
offset += GT_TT_LENGTH;
}
/* Decode Numbering Plan and Encoding Scheme (if present) */
switch (gti) {
case ITU_AI_GTI_TT_NP_ES:
case ITU_AI_GTI_TT_NP_ES_NAI:
case ANSI_AI_GTI_TT_NP_ES:
np = tvb_get_guint8(tvb, offset) & GT_NP_MASK;
proto_tree_add_uint(gt_tree, called ? hf_sccp_called_gt_np
: hf_sccp_calling_gt_np,
tvb, offset, GT_NP_ES_LENGTH, np);
es = tvb_get_guint8(tvb, offset) & GT_ES_MASK;
proto_tree_add_uint(gt_tree, called ? hf_sccp_called_gt_es
: hf_sccp_calling_gt_es,
tvb, offset, GT_NP_ES_LENGTH, es);
even = (es == GT_ES_BCD_EVEN) ? TRUE : FALSE;
offset += GT_NP_ES_LENGTH;
}
/* Decode Odd/Even Indicator (if present) */
if (gti == ITU_AI_GTI_NAI) {
odd_even = tvb_get_guint8(tvb, offset) & GT_OE_MASK;
proto_tree_add_uint(gt_tree, called ? hf_sccp_called_gt_oe
: hf_sccp_calling_gt_oe,
tvb, offset, GT_NAI_LENGTH, odd_even);
even = (odd_even == GT_OE_EVEN) ? TRUE : FALSE;
/* offset doesn't change */
}
/* Decode Nature of Address Indicator (if present) */
switch (gti) {
case ITU_AI_GTI_NAI:
case ITU_AI_GTI_TT_NP_ES_NAI:
nai = tvb_get_guint8(tvb, offset) & GT_NAI_MASK;
proto_tree_add_uint(gt_tree, called ? hf_sccp_called_gt_nai
: hf_sccp_calling_gt_nai,
tvb, offset, GT_NAI_LENGTH, nai);
offset += GT_NAI_LENGTH;
}
/* Decode address signal(s) */
if (length < offset)
return;
signals_tvb = tvb_new_subset(tvb, offset, (length - offset),
(length - offset));
dissect_sccp_gt_address_information(signals_tvb, gt_tree, (length - offset),
even,
called);
}
static int
dissect_sccp_3byte_pc(tvbuff_t *tvb, proto_tree *call_tree, guint offset,
gboolean called)
{
guint32 dpc;
proto_item *call_pc_item = 0;
proto_tree *call_pc_tree = 0;
char pc[ANSI_PC_STRING_LENGTH];
int *hf_pc;
if (mtp3_standard == ANSI_STANDARD)
{
if (called)
hf_pc = &hf_sccp_called_ansi_pc;
else
hf_pc = &hf_sccp_calling_ansi_pc;
} else /* CHINESE_ITU_STANDARD */ {
if (called)
hf_pc = &hf_sccp_called_chinese_pc;
else
hf_pc = &hf_sccp_calling_chinese_pc;
}
/* create the DPC tree; modified from that in packet-mtp3.c */
dpc = tvb_get_ntoh24(tvb, offset);
snprintf(pc, sizeof(pc), "%d-%d-%d", (dpc & ANSI_NETWORK_MASK),
((dpc & ANSI_CLUSTER_MASK) >> 8),
((dpc & ANSI_MEMBER_MASK) >> 16));
call_pc_item = proto_tree_add_string_format(call_tree, *hf_pc,
tvb, offset, ANSI_PC_LENGTH,
pc, "PC (%s)", pc);
call_pc_tree = proto_item_add_subtree(call_pc_item,
called ? ett_sccp_called_pc
: ett_sccp_calling_pc);
proto_tree_add_uint(call_pc_tree, called ? hf_sccp_called_pc_member
: hf_sccp_calling_pc_member,
tvb, offset, ANSI_NCM_LENGTH, dpc);
offset += ANSI_NCM_LENGTH;
proto_tree_add_uint(call_pc_tree, called ? hf_sccp_called_pc_cluster
: hf_sccp_calling_pc_cluster,
tvb, offset, ANSI_NCM_LENGTH, dpc);
offset += ANSI_NCM_LENGTH;
proto_tree_add_uint(call_pc_tree, called ? hf_sccp_called_pc_network
: hf_sccp_calling_pc_network,
tvb, offset, ANSI_NCM_LENGTH, dpc);
offset += ANSI_NCM_LENGTH;
return(offset);
}
/* FUNCTION dissect_sccp_called_calling_param():
* Dissect the Calling or Called Party Address parameters.
*
* The boolean 'called' describes whether this function is decoding a
* called (TRUE) or calling (FALSE) party address. There is simply too
* much code in this function to have 2 copies of it (one for called, one
* for calling).
*
* NOTE: this function is called even when (!tree) so that we can get
* the SSN and subsequently call subdissectors (if and when there's a data
* parameter). Realistically we should put if (!tree)'s around a lot of the
* code, but I think that would make it unreadable--and the expense of not
* doing so does not appear to be very high.
*/
static void
dissect_sccp_called_calling_param(tvbuff_t *tvb, proto_tree *tree,
guint length, gboolean called)
{
proto_item *call_item = 0, *call_ai_item = 0;
proto_tree *call_tree = 0, *call_ai_tree = 0;
guint offset;
guint8 national = -1, routing_ind, gti, pci, ssni, ssn;
guint32 dpc;
tvbuff_t *gt_tvb;
call_item = proto_tree_add_text(tree, tvb, 0, length,
"%s Party address (%u byte%s)",
called ? "Called" : "Calling", length,
plurality(length, "", "s"));
call_tree = proto_item_add_subtree(call_item, called ? ett_sccp_called
: ett_sccp_calling);
call_ai_item = proto_tree_add_text(call_tree, tvb, 0,
ADDRESS_INDICATOR_LENGTH,
"Address Indicator");
call_ai_tree = proto_item_add_subtree(call_ai_item, called ? ett_sccp_called_ai
: ett_sccp_calling_ai);
if (mtp3_standard == ANSI_STANDARD)
{
national = tvb_get_guint8(tvb, 0) & ANSI_NATIONAL_MASK;
proto_tree_add_uint(call_ai_tree, called ? hf_sccp_called_national_indicator
: hf_sccp_calling_national_indicator,
tvb, 0, ADDRESS_INDICATOR_LENGTH, national);
}
routing_ind = tvb_get_guint8(tvb, 0) & ROUTING_INDICATOR_MASK;
proto_tree_add_uint(call_ai_tree, called ? hf_sccp_called_routing_indicator
: hf_sccp_calling_routing_indicator,
tvb, 0, ADDRESS_INDICATOR_LENGTH, routing_ind);
gti = tvb_get_guint8(tvb, 0) & GTI_MASK;
if (mtp3_standard == ITU_STANDARD ||
mtp3_standard == CHINESE_ITU_STANDARD ||
national == 0) {
proto_tree_add_uint(call_ai_tree, called ? hf_sccp_called_itu_global_title_indicator
: hf_sccp_called_itu_global_title_indicator,
tvb, 0, ADDRESS_INDICATOR_LENGTH, gti);
ssni = tvb_get_guint8(tvb, 0) & ITU_SSN_INDICATOR_MASK;
proto_tree_add_uint(call_ai_tree, called ? hf_sccp_called_itu_ssn_indicator
: hf_sccp_calling_itu_ssn_indicator,
tvb, 0, ADDRESS_INDICATOR_LENGTH, ssni);
pci = tvb_get_guint8(tvb, 0) & ITU_PC_INDICATOR_MASK;
proto_tree_add_uint(call_ai_tree, called ? hf_sccp_called_itu_point_code_indicator
: hf_sccp_calling_itu_point_code_indicator,
tvb, 0, ADDRESS_INDICATOR_LENGTH, pci);
offset = ADDRESS_INDICATOR_LENGTH;
/* Dissect PC (if present) */
if (pci) {
if (mtp3_standard == ITU_STANDARD)
{
dpc = tvb_get_letohs(tvb, offset) & ITU_PC_MASK;
proto_tree_add_uint(call_tree, called ? hf_sccp_called_itu_pc
: hf_sccp_calling_itu_pc,
tvb, offset, ITU_PC_LENGTH, dpc);
offset += ITU_PC_LENGTH;
} else /* CHINESE_ITU_STANDARD */ {
offset = dissect_sccp_3byte_pc(tvb, call_tree, offset, called);
}
}
/* Dissect SSN (if present) */
if (ssni) {
ssn = tvb_get_guint8(tvb, offset);
if (called) {
called_ssn = ssn;
}
else {
calling_ssn = ssn;
}
proto_tree_add_uint(call_tree, called ? hf_sccp_called_ssn
: hf_sccp_calling_ssn,
tvb, offset, ADDRESS_SSN_LENGTH, ssn);
proto_tree_add_uint_hidden(call_tree, hf_sccp_ssn, tvb, offset,
ADDRESS_SSN_LENGTH, ssn);
offset += ADDRESS_SSN_LENGTH;
}
if (!tree)
return; /* got SSN, that's all we need here... */
/* Dissect GT (if present) */
if (gti != AI_GTI_NO_GT) {
if (length < offset)
return;
gt_tvb = tvb_new_subset(tvb, offset, (length - offset),
(length - offset));
dissect_sccp_global_title(gt_tvb, call_tree, (length - offset), gti,
called);
}
} else if (mtp3_standard == ANSI_STANDARD) {
proto_tree_add_uint(call_ai_tree, called ? hf_sccp_called_ansi_global_title_indicator
: hf_sccp_calling_ansi_global_title_indicator,
tvb, 0, ADDRESS_INDICATOR_LENGTH, gti);
pci = tvb_get_guint8(tvb, 0) & ANSI_PC_INDICATOR_MASK;
proto_tree_add_uint(call_ai_tree, called ? hf_sccp_called_ansi_point_code_indicator
: hf_sccp_calling_ansi_point_code_indicator,
tvb, 0, ADDRESS_INDICATOR_LENGTH, pci);
ssni = tvb_get_guint8(tvb, 0) & ANSI_SSN_INDICATOR_MASK;
proto_tree_add_uint(call_ai_tree, called ? hf_sccp_called_ansi_ssn_indicator
: hf_sccp_calling_ansi_ssn_indicator,
tvb, 0, ADDRESS_INDICATOR_LENGTH, ssni);
offset = ADDRESS_INDICATOR_LENGTH;
/* Dissect SSN (if present) */
if (ssni) {
ssn = tvb_get_guint8(tvb, offset);
if (called) {
called_ssn = ssn;
}
else {
calling_ssn = ssn;
}
proto_tree_add_uint(call_tree, called ? hf_sccp_called_ssn
: hf_sccp_calling_ssn,
tvb, offset, ADDRESS_SSN_LENGTH, ssn);
proto_tree_add_uint_hidden(call_tree, hf_sccp_ssn, tvb, offset,
ADDRESS_SSN_LENGTH, ssn);
offset += ADDRESS_SSN_LENGTH;
}
if (!tree)
return; /* got SSN, that's all we need here... */
/* Dissect PC (if present) */
if (pci) {
offset = dissect_sccp_3byte_pc(tvb, call_tree, offset, called);
}
/* Dissect GT (if present) */
if (gti != AI_GTI_NO_GT) {
if (length < offset)
return;
gt_tvb = tvb_new_subset(tvb, offset, (length - offset),
(length - offset));
dissect_sccp_global_title(gt_tvb, call_tree, (length - offset), gti,
called);
}
}
}
static void
dissect_sccp_called_param(tvbuff_t *tvb, proto_tree *tree, guint length)
{
dissect_sccp_called_calling_param(tvb, tree, length, TRUE);
}
static void
dissect_sccp_calling_param(tvbuff_t *tvb, proto_tree *tree, guint length)
{
dissect_sccp_called_calling_param(tvb, tree, length, FALSE);
}
static void
dissect_sccp_class_param(tvbuff_t *tvb, proto_tree *tree, guint length)
{
guint8 class, handling;
class = tvb_get_guint8(tvb, 0) & CLASS_CLASS_MASK;
handling = tvb_get_guint8(tvb, 0) & CLASS_SPARE_HANDLING_MASK;
proto_tree_add_uint(tree, hf_sccp_class, tvb, 0, length, class);
if (class == 0 || class == 1)
proto_tree_add_uint(tree, hf_sccp_handling, tvb, 0, length, handling);
}
static void
dissect_sccp_segmenting_reassembling_param(tvbuff_t *tvb, proto_tree *tree, guint length)
{
guint8 more;
more = tvb_get_guint8(tvb, 0) & SEGMENTING_REASSEMBLING_MASK;
proto_tree_add_uint(tree, hf_sccp_more, tvb, 0, length, more);
}
static void
dissect_sccp_receive_sequence_number_param(tvbuff_t *tvb, proto_tree *tree, guint length)
{
guint8 rsn;
rsn = tvb_get_guint8(tvb, 0) >> 1;
proto_tree_add_uint(tree, hf_sccp_rsn, tvb, 0, length, rsn);
}
static void
dissect_sccp_sequencing_segmenting_param(tvbuff_t *tvb, proto_tree *tree, guint length)
{
guint8 rsn, ssn, more;
proto_item *param_item;
proto_tree *param_tree;
ssn = tvb_get_guint8(tvb, 0) >> 1;
rsn = tvb_get_guint8(tvb, SEQUENCING_SEGMENTING_SSN_LENGTH) >> 1;
more = tvb_get_guint8(tvb, SEQUENCING_SEGMENTING_SSN_LENGTH) & SEQUENCING_SEGMENTING_MORE_MASK;
param_item = proto_tree_add_text(tree, tvb, 0, length,
val_to_str(PARAMETER_SEQUENCING_SEGMENTING,
sccp_parameter_values, "Unknown"));
param_tree = proto_item_add_subtree(param_item,
ett_sccp_sequencing_segmenting);
proto_tree_add_uint(param_tree, hf_sccp_sequencing_segmenting_ssn, tvb, 0,
SEQUENCING_SEGMENTING_SSN_LENGTH, ssn);
proto_tree_add_uint(param_tree, hf_sccp_sequencing_segmenting_rsn, tvb,
SEQUENCING_SEGMENTING_SSN_LENGTH,
SEQUENCING_SEGMENTING_RSN_LENGTH, rsn);
proto_tree_add_uint(param_tree, hf_sccp_sequencing_segmenting_more, tvb,
SEQUENCING_SEGMENTING_SSN_LENGTH,
SEQUENCING_SEGMENTING_RSN_LENGTH, more);
}
static void
dissect_sccp_credit_param(tvbuff_t *tvb, proto_tree *tree, guint length)
{
guint8 credit;
credit = tvb_get_guint8(tvb, 0);
proto_tree_add_uint(tree, hf_sccp_credit, tvb, 0, length, credit);
}
static void
dissect_sccp_release_cause_param(tvbuff_t *tvb, proto_tree *tree, guint length)
{
guint8 cause;
cause = tvb_get_guint8(tvb, 0);
proto_tree_add_uint(tree, hf_sccp_release_cause, tvb, 0, length, cause);
}
static void
dissect_sccp_return_cause_param(tvbuff_t *tvb, proto_tree *tree, guint length)
{
guint8 cause;
cause = tvb_get_guint8(tvb, 0);
proto_tree_add_uint(tree, hf_sccp_return_cause, tvb, 0, length, cause);
}
static void
dissect_sccp_reset_cause_param(tvbuff_t *tvb, proto_tree *tree, guint length)
{
guint8 cause;
cause = tvb_get_guint8(tvb, 0);
proto_tree_add_uint(tree, hf_sccp_reset_cause, tvb, 0, length, cause);
}
static void
dissect_sccp_error_cause_param(tvbuff_t *tvb, proto_tree *tree, guint length)
{
guint8 cause;
cause = tvb_get_guint8(tvb, 0);
proto_tree_add_uint(tree, hf_sccp_error_cause, tvb, 0, length, cause);
}
static void
dissect_sccp_refusal_cause_param(tvbuff_t *tvb, proto_tree *tree, guint length)
{
guint8 cause;
cause = tvb_get_guint8(tvb, 0);
proto_tree_add_uint(tree, hf_sccp_refusal_cause, tvb, 0, length, cause);
}
/* This function is used for both data and long data (ITU only) parameters */
static void
dissect_sccp_data_param(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
/* Try subdissectors (if we found a valid SSN on the current message) */
if ((called_ssn != INVALID_SSN &&
dissector_try_port(sccp_ssn_dissector_table, called_ssn, tvb, pinfo,
tree)) ||
(calling_ssn != INVALID_SSN &&
dissector_try_port(sccp_ssn_dissector_table, calling_ssn, tvb, pinfo,
tree)))
return;
/* try heuristic subdissector list to see if there are any takers */
if (dissector_try_heuristic(heur_subdissector_list, tvb, pinfo, tree))
{
return;
}
/* No sub-dissection occured, treat it as raw data */
call_dissector(data_handle, tvb, pinfo, tree);
}
static void
dissect_sccp_segmentation_param(tvbuff_t *tvb, proto_tree *tree, guint length)
{
guint8 first, class, remaining;
guint32 slr;
proto_item *param_item;
proto_tree *param_tree;
first = tvb_get_guint8(tvb, 0) & SEGMENTATION_FIRST_SEGMENT_MASK;
class = tvb_get_guint8(tvb, 0) & SEGMENTATION_CLASS_MASK;
remaining = tvb_get_guint8(tvb, 0) & SEGMENTATION_REMAINING_MASK;
slr = tvb_get_letoh24(tvb, 1);
param_item = proto_tree_add_text(tree, tvb, 0, length,
val_to_str(PARAMETER_SEGMENTATION,
sccp_parameter_values, "Unknown"));
param_tree = proto_item_add_subtree(param_item, ett_sccp_segmentation);
proto_tree_add_uint(param_tree, hf_sccp_segmentation_first, tvb, 0, length,
first);
proto_tree_add_uint(param_tree, hf_sccp_segmentation_class, tvb, 0, length,
class);
proto_tree_add_uint(param_tree, hf_sccp_segmentation_remaining, tvb, 0,
length, remaining);
proto_tree_add_uint(param_tree, hf_sccp_segmentation_slr, tvb, 1, length,
slr);
}
static void
dissect_sccp_hop_counter_param(tvbuff_t *tvb, proto_tree *tree, guint length)
{
guint8 hops;
hops = tvb_get_guint8(tvb, 0);
proto_tree_add_uint(tree, hf_sccp_hop_counter, tvb, 0, length, hops);
}
static void
dissect_sccp_importance_param(tvbuff_t *tvb, proto_tree *tree, guint length)
{
guint8 importance;
importance = tvb_get_guint8(tvb, 0) & IMPORTANCE_IMPORTANCE_MASK;
proto_tree_add_uint(tree, hf_sccp_importance, tvb, 0, length, importance);
}
static void
dissect_sccp_isni_param(tvbuff_t *tvb, proto_tree *tree, guint length)
{
guint8 mi, iri, ti, network, netspec;
guint offset = 0;
proto_item *param_item;
proto_tree *param_tree;
/* Create a subtree for ISNI Routing Control */
param_item = proto_tree_add_text(tree, tvb, offset, ANSI_ISNI_ROUTING_CONTROL_LENGTH,
"ISNI Routing Control");
param_tree = proto_item_add_subtree(param_item,
ett_sccp_ansi_isni_routing_control);
mi = tvb_get_guint8(tvb, offset) & ANSI_ISNI_MI_MASK;
proto_tree_add_uint(param_tree, hf_sccp_ansi_isni_mi, tvb, offset,
ANSI_ISNI_ROUTING_CONTROL_LENGTH, mi);
iri = tvb_get_guint8(tvb, offset) & ANSI_ISNI_IRI_MASK;
proto_tree_add_uint(param_tree, hf_sccp_ansi_isni_iri, tvb, offset,
ANSI_ISNI_ROUTING_CONTROL_LENGTH, iri);
ti = tvb_get_guint8(tvb, offset) & ANSI_ISNI_TI_MASK;
proto_tree_add_uint(param_tree, hf_sccp_ansi_isni_ti, tvb, offset,
ANSI_ISNI_ROUTING_CONTROL_LENGTH, ti);
offset += ANSI_ISNI_ROUTING_CONTROL_LENGTH;
if ((ti >> ANSI_ISNI_TI_SHIFT) == ANSI_ISNI_TYPE_1) {
netspec = tvb_get_guint8(tvb, offset) & ANSI_ISNI_NETSPEC_MASK;
proto_tree_add_uint(param_tree, hf_sccp_ansi_isni_netspec, tvb, offset,
ANSI_ISNI_ROUTING_CONTROL_LENGTH, ti);
offset += ANSI_ISNI_ROUTING_CONTROL_LENGTH;
}
while (offset < length) {
network = tvb_get_guint8(tvb, offset);
proto_tree_add_text(tree, tvb, offset, ANSI_NCM_LENGTH,
"Network ID network: %d", network);
offset++;
network = tvb_get_guint8(tvb, offset);
proto_tree_add_text(tree, tvb, offset, ANSI_NCM_LENGTH,
"Network ID cluster: %d", network);
offset++;
}
}
/* FUNCTION dissect_sccp_parameter():
* Dissect a parameter given its type, offset into tvb, and length.
*/
static guint16
dissect_sccp_parameter(tvbuff_t *tvb, packet_info *pinfo, proto_tree *sccp_tree,
proto_tree *tree, guint8 parameter_type, guint16 offset,
guint16 parameter_length)
{
tvbuff_t *parameter_tvb;
switch (parameter_type) {
case PARAMETER_CALLED_PARTY_ADDRESS:
case PARAMETER_CALLING_PARTY_ADDRESS:
case PARAMETER_DATA:
case PARAMETER_LONG_DATA:
/* These parameters must be dissected even if !sccp_tree (so that
* subdissectors can be called).
*/
break;
default:
if (!sccp_tree)
return(parameter_length);
}
parameter_tvb = tvb_new_subset(tvb, offset, parameter_length, parameter_length);
switch (parameter_type) {
case PARAMETER_END_OF_OPTIONAL_PARAMETERS:
proto_tree_add_text(sccp_tree, tvb, offset, parameter_length,
"End of Optional");
break;
case PARAMETER_DESTINATION_LOCAL_REFERENCE:
dissect_sccp_dlr_param(parameter_tvb, sccp_tree, parameter_length);
break;
case PARAMETER_SOURCE_LOCAL_REFERENCE:
dissect_sccp_slr_param(parameter_tvb, sccp_tree, parameter_length);
break;
case PARAMETER_CALLED_PARTY_ADDRESS:
dissect_sccp_called_param(parameter_tvb, sccp_tree, parameter_length);
break;
case PARAMETER_CALLING_PARTY_ADDRESS:
dissect_sccp_calling_param(parameter_tvb, sccp_tree, parameter_length);
break;
case PARAMETER_CLASS:
dissect_sccp_class_param(parameter_tvb, sccp_tree, parameter_length);
break;
case PARAMETER_SEGMENTING_REASSEMBLING:
dissect_sccp_segmenting_reassembling_param(parameter_tvb, sccp_tree,
parameter_length);
break;
case PARAMETER_RECEIVE_SEQUENCE_NUMBER:
dissect_sccp_receive_sequence_number_param(parameter_tvb, sccp_tree,
parameter_length);
break;
case PARAMETER_SEQUENCING_SEGMENTING:
dissect_sccp_sequencing_segmenting_param(parameter_tvb, sccp_tree,
parameter_length);
break;
case PARAMETER_CREDIT:
dissect_sccp_credit_param(parameter_tvb, sccp_tree, parameter_length);
break;
case PARAMETER_RELEASE_CAUSE:
dissect_sccp_release_cause_param(parameter_tvb, sccp_tree, parameter_length);
break;
case PARAMETER_RETURN_CAUSE:
dissect_sccp_return_cause_param(parameter_tvb, sccp_tree, parameter_length);
break;
case PARAMETER_RESET_CAUSE:
dissect_sccp_reset_cause_param(parameter_tvb, sccp_tree, parameter_length);
break;
case PARAMETER_ERROR_CAUSE:
dissect_sccp_error_cause_param(parameter_tvb, sccp_tree, parameter_length);
break;
case PARAMETER_REFUSAL_CAUSE:
dissect_sccp_refusal_cause_param(parameter_tvb, sccp_tree, parameter_length);
break;
case PARAMETER_DATA:
dissect_sccp_data_param(parameter_tvb, pinfo, tree);
/* TODO? Re-adjust length of SCCP item since it may be sub-dissected */
/* sccp_length = proto_item_get_len(sccp_item);
* sccp_length -= parameter_length;
* proto_item_set_len(sccp_item, sccp_length);
*/
break;
case PARAMETER_SEGMENTATION:
dissect_sccp_segmentation_param(parameter_tvb, sccp_tree, parameter_length);
break;
case PARAMETER_HOP_COUNTER:
dissect_sccp_hop_counter_param(parameter_tvb, sccp_tree, parameter_length);
break;
case PARAMETER_IMPORTANCE:
if (mtp3_standard != ANSI_STANDARD)
dissect_sccp_importance_param(parameter_tvb, sccp_tree, parameter_length);
else
dissect_sccp_unknown_param(parameter_tvb, sccp_tree, parameter_type,
parameter_length);
break;
case PARAMETER_LONG_DATA:
if (mtp3_standard != ANSI_STANDARD)
dissect_sccp_data_param(parameter_tvb, pinfo, tree);
else
dissect_sccp_unknown_param(parameter_tvb, sccp_tree, parameter_type,
parameter_length);
break;
case PARAMETER_ISNI:
if (mtp3_standard != ANSI_STANDARD)
dissect_sccp_unknown_param(parameter_tvb, sccp_tree, parameter_type,
parameter_length);
else
dissect_sccp_isni_param(parameter_tvb, sccp_tree, parameter_length);
break;
default:
dissect_sccp_unknown_param(parameter_tvb, sccp_tree, parameter_type,
parameter_length);
break;
}
return(parameter_length);
}
/* FUNCTION dissect_sccp_variable_parameter():
* Dissect a variable parameter given its type and offset into tvb. Length
* of the parameter is gotten from tvb[0].
* Length returned is sum of (length + parameter).
*/
static guint16
dissect_sccp_variable_parameter(tvbuff_t *tvb, packet_info *pinfo,
proto_tree *sccp_tree, proto_tree *tree,
guint8 parameter_type, guint16 offset)
{
guint16 parameter_length;
guint8 length_length;
if (parameter_type != PARAMETER_LONG_DATA)
{
parameter_length = tvb_get_guint8(tvb, offset);
length_length = PARAMETER_LENGTH_LENGTH;
}
else
{
/* Long data parameter has 16 bit length */
parameter_length = tvb_get_letohs(tvb, offset);
length_length = PARAMETER_LONG_DATA_LENGTH_LENGTH;
}
if (sccp_tree &&
sccp_show_length)
{
proto_tree_add_text(sccp_tree, tvb, offset, length_length,
"%s length: %d",
val_to_str(parameter_type, sccp_parameter_values,
"Unknown"),
parameter_length);
}
offset += length_length;
dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree, parameter_type, offset,
parameter_length);
return(parameter_length + length_length);
}
/* FUNCTION dissect_sccp_optional_parameters():
* Dissect all the optional parameters given the start of the optional
* parameters into tvb. Parameter types and lengths are read from tvb.
*/
static void
dissect_sccp_optional_parameters(tvbuff_t *tvb, packet_info *pinfo,
proto_tree *sccp_tree, proto_tree *tree,
guint16 offset)
{
guint8 parameter_type;
while ((parameter_type = tvb_get_guint8(tvb, offset)) !=
PARAMETER_END_OF_OPTIONAL_PARAMETERS) {
offset += PARAMETER_TYPE_LENGTH;
offset += dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree,
parameter_type, offset);
}
/* Process end of optional parameters */
dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree, parameter_type, offset,
END_OF_OPTIONAL_PARAMETERS_LENGTH);
}
static void
dissect_sccp_message(tvbuff_t *tvb, packet_info *pinfo, proto_tree *sccp_tree,
proto_tree *tree)
{
guint8 message_type;
guint16 variable_pointer1 = 0, variable_pointer2 = 0, variable_pointer3 = 0;
guint16 optional_pointer = 0;
guint16 offset = 0;
/* Macro for getting pointer to mandatory variable parameters */
#define VARIABLE_POINTER(var, hf_var, ptr_size) \
if (ptr_size == POINTER_LENGTH) \
var = tvb_get_guint8(tvb, offset); \
else \
var = tvb_get_letohs(tvb, offset); \
proto_tree_add_uint(sccp_tree, hf_var, tvb, \
offset, ptr_size, var); \
var += offset; \
if (ptr_size == POINTER_LENGTH_LONG) \
var += 1; \
offset += ptr_size;
/* Macro for getting pointer to optional parameters */
#define OPTIONAL_POINTER(ptr_size) \
if (ptr_size == POINTER_LENGTH) \
optional_pointer = tvb_get_guint8(tvb, offset); \
else \
optional_pointer = tvb_get_letohs(tvb, offset); \
proto_tree_add_uint(sccp_tree, hf_sccp_optional_pointer, tvb, \
offset, ptr_size, optional_pointer); \
optional_pointer += offset; \
if (ptr_size == POINTER_LENGTH_LONG) \
optional_pointer += 1; \
offset += ptr_size;
/* Extract the message type; all other processing is based on this */
message_type = tvb_get_guint8(tvb, MESSAGE_TYPE_OFFSET);
offset = MESSAGE_TYPE_LENGTH;
if (check_col(pinfo->cinfo, COL_INFO))
col_add_fstr(pinfo->cinfo, COL_INFO, "%s ",
val_to_str(message_type, sccp_message_type_acro_values, "Unknown"));
if (sccp_tree) {
/* add the message type to the protocol tree */
proto_tree_add_uint(sccp_tree, hf_sccp_message_type, tvb,
MESSAGE_TYPE_OFFSET, MESSAGE_TYPE_LENGTH, message_type);
};
/* Starting a new message dissection; clear the global SSN values */
called_ssn = INVALID_SSN;
calling_ssn = INVALID_SSN;
switch(message_type) {
case MESSAGE_TYPE_CR:
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_SOURCE_LOCAL_REFERENCE,
offset, SOURCE_LOCAL_REFERENCE_LENGTH);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CLASS, offset,
PROTOCOL_CLASS_LENGTH);
VARIABLE_POINTER(variable_pointer1, hf_sccp_variable_pointer1, POINTER_LENGTH)
OPTIONAL_POINTER(POINTER_LENGTH)
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CALLED_PARTY_ADDRESS,
variable_pointer1);
break;
case MESSAGE_TYPE_CC:
/* TODO: connection has been established; theoretically we could keep
* keep track of the SLR/DLR with the called/calling from the CR and
* track the connection (e.g., on subsequent messages regarding this
* SLR we could set the global vars "call*_ssn" so data could get
* sub-dissected).
*/
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_DESTINATION_LOCAL_REFERENCE,
offset,
DESTINATION_LOCAL_REFERENCE_LENGTH);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_SOURCE_LOCAL_REFERENCE,
offset, SOURCE_LOCAL_REFERENCE_LENGTH);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CLASS, offset,
PROTOCOL_CLASS_LENGTH);
OPTIONAL_POINTER(POINTER_LENGTH)
break;
case MESSAGE_TYPE_CREF:
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_DESTINATION_LOCAL_REFERENCE,
offset,
DESTINATION_LOCAL_REFERENCE_LENGTH);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_REFUSAL_CAUSE, offset,
REFUSAL_CAUSE_LENGTH);
OPTIONAL_POINTER(POINTER_LENGTH)
break;
case MESSAGE_TYPE_RLSD:
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_DESTINATION_LOCAL_REFERENCE,
offset,
DESTINATION_LOCAL_REFERENCE_LENGTH);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_SOURCE_LOCAL_REFERENCE,
offset, SOURCE_LOCAL_REFERENCE_LENGTH);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_RELEASE_CAUSE, offset,
RELEASE_CAUSE_LENGTH);
OPTIONAL_POINTER(POINTER_LENGTH)
break;
case MESSAGE_TYPE_RLC:
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_DESTINATION_LOCAL_REFERENCE,
offset,
DESTINATION_LOCAL_REFERENCE_LENGTH);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_SOURCE_LOCAL_REFERENCE,
offset, SOURCE_LOCAL_REFERENCE_LENGTH);
break;
case MESSAGE_TYPE_DT1:
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_DESTINATION_LOCAL_REFERENCE,
offset,
DESTINATION_LOCAL_REFERENCE_LENGTH);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_SEGMENTING_REASSEMBLING,
offset, SEGMENTING_REASSEMBLING_LENGTH);
VARIABLE_POINTER(variable_pointer1, hf_sccp_variable_pointer1, POINTER_LENGTH)
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree, PARAMETER_DATA,
variable_pointer1);
break;
case MESSAGE_TYPE_DT2:
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_DESTINATION_LOCAL_REFERENCE,
offset,
DESTINATION_LOCAL_REFERENCE_LENGTH);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_SEQUENCING_SEGMENTING, offset,
SEQUENCING_SEGMENTING_LENGTH);
break;
case MESSAGE_TYPE_AK:
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_DESTINATION_LOCAL_REFERENCE,
offset,
DESTINATION_LOCAL_REFERENCE_LENGTH);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_RECEIVE_SEQUENCE_NUMBER,
offset, RECEIVE_SEQUENCE_NUMBER_LENGTH);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CREDIT, offset, CREDIT_LENGTH);
break;
case MESSAGE_TYPE_UDT:
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CLASS, offset,
PROTOCOL_CLASS_LENGTH);
VARIABLE_POINTER(variable_pointer1, hf_sccp_variable_pointer1, POINTER_LENGTH)
VARIABLE_POINTER(variable_pointer2, hf_sccp_variable_pointer2, POINTER_LENGTH)
VARIABLE_POINTER(variable_pointer3, hf_sccp_variable_pointer3, POINTER_LENGTH)
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CALLED_PARTY_ADDRESS,
variable_pointer1);
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CALLING_PARTY_ADDRESS,
variable_pointer2);
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree, PARAMETER_DATA,
variable_pointer3);
break;
case MESSAGE_TYPE_UDTS:
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_RETURN_CAUSE, offset,
RETURN_CAUSE_LENGTH);
VARIABLE_POINTER(variable_pointer1, hf_sccp_variable_pointer1, POINTER_LENGTH)
VARIABLE_POINTER(variable_pointer2, hf_sccp_variable_pointer2, POINTER_LENGTH)
VARIABLE_POINTER(variable_pointer3, hf_sccp_variable_pointer3, POINTER_LENGTH)
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CALLED_PARTY_ADDRESS,
variable_pointer1);
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CALLING_PARTY_ADDRESS,
variable_pointer2);
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree, PARAMETER_DATA,
variable_pointer3);
break;
case MESSAGE_TYPE_ED:
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_DESTINATION_LOCAL_REFERENCE,
offset,
DESTINATION_LOCAL_REFERENCE_LENGTH);
VARIABLE_POINTER(variable_pointer1, hf_sccp_variable_pointer1, POINTER_LENGTH)
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree, PARAMETER_DATA,
variable_pointer1);
break;
case MESSAGE_TYPE_EA:
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_DESTINATION_LOCAL_REFERENCE,
offset,
DESTINATION_LOCAL_REFERENCE_LENGTH);
break;
case MESSAGE_TYPE_RSR:
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_DESTINATION_LOCAL_REFERENCE,
offset,
DESTINATION_LOCAL_REFERENCE_LENGTH);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_SOURCE_LOCAL_REFERENCE,
offset, SOURCE_LOCAL_REFERENCE_LENGTH);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_RESET_CAUSE, offset,
RESET_CAUSE_LENGTH);
break;
case MESSAGE_TYPE_RSC:
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_DESTINATION_LOCAL_REFERENCE,
offset,
DESTINATION_LOCAL_REFERENCE_LENGTH);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_SOURCE_LOCAL_REFERENCE,
offset, SOURCE_LOCAL_REFERENCE_LENGTH);
break;
case MESSAGE_TYPE_ERR:
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_DESTINATION_LOCAL_REFERENCE,
offset,
DESTINATION_LOCAL_REFERENCE_LENGTH);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_ERROR_CAUSE, offset,
ERROR_CAUSE_LENGTH);
break;
case MESSAGE_TYPE_IT:
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_DESTINATION_LOCAL_REFERENCE,
offset,
DESTINATION_LOCAL_REFERENCE_LENGTH);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_SOURCE_LOCAL_REFERENCE,
offset, SOURCE_LOCAL_REFERENCE_LENGTH);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CLASS, offset,
PROTOCOL_CLASS_LENGTH);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_SEQUENCING_SEGMENTING,
offset, SEQUENCING_SEGMENTING_LENGTH);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CREDIT, offset, CREDIT_LENGTH);
break;
case MESSAGE_TYPE_XUDT:
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CLASS, offset,
PROTOCOL_CLASS_LENGTH);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_HOP_COUNTER, offset,
HOP_COUNTER_LENGTH);
VARIABLE_POINTER(variable_pointer1, hf_sccp_variable_pointer1, POINTER_LENGTH)
VARIABLE_POINTER(variable_pointer2, hf_sccp_variable_pointer2, POINTER_LENGTH)
VARIABLE_POINTER(variable_pointer3, hf_sccp_variable_pointer3, POINTER_LENGTH)
OPTIONAL_POINTER(POINTER_LENGTH)
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CALLED_PARTY_ADDRESS,
variable_pointer1);
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CALLING_PARTY_ADDRESS,
variable_pointer2);
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree, PARAMETER_DATA,
variable_pointer3);
break;
case MESSAGE_TYPE_XUDTS:
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_RETURN_CAUSE, offset,
RETURN_CAUSE_LENGTH);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_HOP_COUNTER, offset,
HOP_COUNTER_LENGTH);
VARIABLE_POINTER(variable_pointer1, hf_sccp_variable_pointer1, POINTER_LENGTH)
VARIABLE_POINTER(variable_pointer2, hf_sccp_variable_pointer2, POINTER_LENGTH)
VARIABLE_POINTER(variable_pointer3, hf_sccp_variable_pointer3, POINTER_LENGTH)
OPTIONAL_POINTER(POINTER_LENGTH)
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CALLED_PARTY_ADDRESS,
variable_pointer1);
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CALLING_PARTY_ADDRESS,
variable_pointer2);
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree, PARAMETER_DATA,
variable_pointer3);
break;
case MESSAGE_TYPE_LUDT:
if (mtp3_standard != ANSI_STANDARD)
{
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CLASS, offset,
PROTOCOL_CLASS_LENGTH);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_HOP_COUNTER, offset,
HOP_COUNTER_LENGTH);
VARIABLE_POINTER(variable_pointer1, hf_sccp_variable_pointer1, POINTER_LENGTH_LONG)
VARIABLE_POINTER(variable_pointer2, hf_sccp_variable_pointer2, POINTER_LENGTH_LONG)
VARIABLE_POINTER(variable_pointer3, hf_sccp_variable_pointer3, POINTER_LENGTH_LONG)
OPTIONAL_POINTER(POINTER_LENGTH_LONG)
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CALLED_PARTY_ADDRESS,
variable_pointer1);
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CALLING_PARTY_ADDRESS,
variable_pointer2);
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_LONG_DATA, variable_pointer3);
} else
dissect_sccp_unknown_message(tvb, sccp_tree);
break;
case MESSAGE_TYPE_LUDTS:
if (mtp3_standard != ANSI_STANDARD)
{
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_RETURN_CAUSE, offset,
RETURN_CAUSE_LENGTH);
offset += dissect_sccp_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_HOP_COUNTER, offset,
HOP_COUNTER_LENGTH);
VARIABLE_POINTER(variable_pointer1, hf_sccp_variable_pointer1, POINTER_LENGTH_LONG)
VARIABLE_POINTER(variable_pointer2, hf_sccp_variable_pointer2, POINTER_LENGTH_LONG)
VARIABLE_POINTER(variable_pointer3, hf_sccp_variable_pointer3, POINTER_LENGTH_LONG)
OPTIONAL_POINTER(POINTER_LENGTH_LONG)
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CALLED_PARTY_ADDRESS,
variable_pointer1);
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_CALLING_PARTY_ADDRESS,
variable_pointer2);
dissect_sccp_variable_parameter(tvb, pinfo, sccp_tree, tree,
PARAMETER_LONG_DATA, variable_pointer3);
} else
dissect_sccp_unknown_message(tvb, sccp_tree);
break;
default:
dissect_sccp_unknown_message(tvb, sccp_tree);
}
if (optional_pointer)
dissect_sccp_optional_parameters(tvb, pinfo, sccp_tree, tree,
optional_pointer);
}
static void
dissect_sccp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_item *sccp_item;
proto_tree *sccp_tree = NULL;
const mtp3_addr_pc_t *mtp3_addr_p;
/* Make entry in the Protocol column on summary display */
if (check_col(pinfo->cinfo, COL_PROTOCOL))
switch(mtp3_standard) {
case ITU_STANDARD:
col_set_str(pinfo->cinfo, COL_PROTOCOL, "SCCP (Int. ITU)");
break;
case ANSI_STANDARD:
col_set_str(pinfo->cinfo, COL_PROTOCOL, "SCCP (ANSI)");
break;
case CHINESE_ITU_STANDARD:
col_set_str(pinfo->cinfo, COL_PROTOCOL, "SCCP (Chin. ITU)");
break;
};
/* In the interest of speed, if "tree" is NULL, don't do any work not
necessary to generate protocol tree items. */
if (tree) {
/* create the sccp protocol tree */
sccp_item = proto_tree_add_item(tree, proto_sccp, tvb, 0, -1, FALSE);
sccp_tree = proto_item_add_subtree(sccp_item, ett_sccp);
}
/* Set whether message is UPLINK, DOWNLINK, or of UNKNOWN direction */
if (pinfo->net_src.type == AT_SS7PC)
{
/*
* XXX - we assume that the "data" pointers of the source and destination
* addresses are set to point to "mtp3_addr_pc_t" structures, so that
* we can safely cast them.
*/
mtp3_addr_p = (const mtp3_addr_pc_t *)pinfo->net_src.data;
if (sccp_source_pc_global == mtp3_addr_p->pc)
{
pinfo->p2p_dir = P2P_DIR_SENT;
}
else
{
/* assuming if net_src was SS7 PC then net_dst will be too */
mtp3_addr_p = (const mtp3_addr_pc_t *)pinfo->net_dst.data;
if (sccp_source_pc_global == mtp3_addr_p->pc)
{
pinfo->p2p_dir = P2P_DIR_RECV;
}
else
{
pinfo->p2p_dir = P2P_DIR_UNKNOWN;
}
}
}
/* dissect the message */
dissect_sccp_message(tvb, pinfo, sccp_tree, tree);
}
/* Register the protocol with Ethereal */
void
proto_register_sccp(void)
{
/* Setup list of header fields */
static hf_register_info hf[] = {
{ &hf_sccp_message_type,
{ "Message Type", "sccp.message_type",
FT_UINT8, BASE_HEX, VALS(sccp_message_type_values), 0x0,
"", HFILL}},
{ &hf_sccp_variable_pointer1,
{ "Pointer to first Mandatory Variable parameter", "sccp.variable_pointer1",
FT_UINT16, BASE_DEC, NULL, 0x0,
"", HFILL}},
{ &hf_sccp_variable_pointer2,
{ "Pointer to second Mandatory Variable parameter", "sccp.variable_pointer2",
FT_UINT16, BASE_DEC, NULL, 0x0,
"", HFILL}},
{ &hf_sccp_variable_pointer3,
{ "Pointer to third Mandatory Variable parameter", "sccp.variable_pointer3",
FT_UINT16, BASE_DEC, NULL, 0x0,
"", HFILL}},
{ &hf_sccp_optional_pointer,
{ "Pointer to Optional parameter", "sccp.optional_pointer",
FT_UINT16, BASE_DEC, NULL, 0x0,
"", HFILL}},
{ &hf_sccp_ssn,
{ "Called or Calling SubSystem Number", "sccp.ssn",
FT_UINT8, BASE_DEC, VALS(sccp_ssn_values), 0x0,
"", HFILL}},
{ &hf_sccp_gt_digits,
{ "Called or Calling GT Digits",
"sccp.digits",
FT_STRING, BASE_NONE, NULL, 0x0,
"", HFILL }},
{ &hf_sccp_called_national_indicator,
{ "National Indicator", "sccp.called.ni",
FT_UINT8, BASE_HEX, VALS(sccp_national_indicator_values), ANSI_NATIONAL_MASK,
"", HFILL}},
{ &hf_sccp_called_routing_indicator,
{ "Routing Indicator", "sccp.called.ri",
FT_UINT8, BASE_HEX, VALS(sccp_routing_indicator_values), ROUTING_INDICATOR_MASK,
"", HFILL}},
{ &hf_sccp_called_itu_global_title_indicator,
{ "Global Title Indicator", "sccp.called.gti",
FT_UINT8, BASE_HEX, VALS(sccp_itu_global_title_indicator_values), GTI_MASK,
"", HFILL}},
{ &hf_sccp_called_ansi_global_title_indicator,
{ "Global Title Indicator", "sccp.called.gti",
FT_UINT8, BASE_HEX, VALS(sccp_ansi_global_title_indicator_values), GTI_MASK,
"", HFILL}},
{ &hf_sccp_called_itu_ssn_indicator,
{ "SubSystem Number Indicator", "sccp.called.ssni",
FT_UINT8, BASE_HEX, VALS(sccp_ai_ssni_values), ITU_SSN_INDICATOR_MASK,
"", HFILL}},
{ &hf_sccp_called_itu_point_code_indicator,
{ "Point Code Indicator", "sccp.called.pci",
FT_UINT8, BASE_HEX, VALS(sccp_ai_pci_values), ITU_PC_INDICATOR_MASK,
"", HFILL}},
{ &hf_sccp_called_ansi_ssn_indicator,
{ "SubSystem Number Indicator", "sccp.called.ssni",
FT_UINT8, BASE_HEX, VALS(sccp_ai_ssni_values), ANSI_SSN_INDICATOR_MASK,
"", HFILL}},
{ &hf_sccp_called_ansi_point_code_indicator,
{ "Point Code Indicator", "sccp.called.pci",
FT_UINT8, BASE_HEX, VALS(sccp_ai_pci_values), ANSI_PC_INDICATOR_MASK,
"", HFILL}},
{ &hf_sccp_called_ssn,
{ "SubSystem Number", "sccp.called.ssn",
FT_UINT8, BASE_DEC, VALS(sccp_ssn_values), 0x0,
"", HFILL}},
{ &hf_sccp_called_itu_pc,
{ "PC", "sccp.called.pc",
FT_UINT16, BASE_DEC, NULL, ITU_PC_MASK,
"", HFILL}},
{ &hf_sccp_called_ansi_pc,
{ "PC", "sccp.called.ansi_pc",
FT_STRING, BASE_NONE, NULL, 0x0,
"", HFILL}},
{ &hf_sccp_called_chinese_pc,
{ "PC", "sccp.called.chinese_pc",
FT_STRING, BASE_NONE, NULL, 0x0,
"", HFILL}},
{ &hf_sccp_called_pc_network,
{ "PC Network",
"sccp.called.network",
FT_UINT24, BASE_DEC, NULL, ANSI_NETWORK_MASK,
"", HFILL }},
{ &hf_sccp_called_pc_cluster,
{ "PC Cluster",
"sccp.called.cluster",
FT_UINT24, BASE_DEC, NULL, ANSI_CLUSTER_MASK,
"", HFILL }},
{ &hf_sccp_called_pc_member,
{ "PC Member",
"sccp.called.member",
FT_UINT24, BASE_DEC, NULL, ANSI_MEMBER_MASK,
"", HFILL }},
{ &hf_sccp_called_gt_nai,
{ "Nature of Address Indicator",
"sccp.called.nai",
FT_UINT8, BASE_HEX, VALS(sccp_nai_values), GT_NAI_MASK,
"", HFILL }},
{ &hf_sccp_called_gt_oe,
{ "Odd/Even Indicator",
"sccp.called.oe",
FT_UINT8, BASE_HEX, VALS(sccp_oe_values), GT_OE_MASK,
"", HFILL }},
{ &hf_sccp_called_gt_tt,
{ "Translation Type",
"sccp.called.tt",
FT_UINT8, BASE_HEX, NULL, 0x0,
"", HFILL }},
{ &hf_sccp_called_gt_np,
{ "Numbering Plan",
"sccp.called.np",
FT_UINT8, BASE_HEX, VALS(sccp_np_values), GT_NP_MASK,
"", HFILL }},
{ &hf_sccp_called_gt_es,
{ "Encoding Scheme",
"sccp.called.es",
FT_UINT8, BASE_HEX, VALS(sccp_es_values), GT_ES_MASK,
"", HFILL }},
{ &hf_sccp_called_gt_digits,
{ "GT Digits",
"sccp.called.digits",
FT_STRING, BASE_NONE, NULL, 0x0,
"", HFILL }},
{ &hf_sccp_calling_national_indicator,
{ "National Indicator", "sccp.calling.ni",
FT_UINT8, BASE_HEX, VALS(sccp_national_indicator_values), ANSI_NATIONAL_MASK,
"", HFILL}},
{ &hf_sccp_calling_routing_indicator,
{ "Routing Indicator", "sccp.calling.ri",
FT_UINT8, BASE_HEX, VALS(sccp_routing_indicator_values), ROUTING_INDICATOR_MASK,
"", HFILL}},
{ &hf_sccp_calling_itu_global_title_indicator,
{ "Global Title Indicator", "sccp.calling.gti",
FT_UINT8, BASE_HEX, VALS(sccp_itu_global_title_indicator_values), GTI_MASK,
"", HFILL}},
{ &hf_sccp_calling_ansi_global_title_indicator,
{ "Global Title Indicator", "sccp.calling.gti",
FT_UINT8, BASE_HEX, VALS(sccp_ansi_global_title_indicator_values), GTI_MASK,
"", HFILL}},
{ &hf_sccp_calling_itu_ssn_indicator,
{ "SubSystem Number Indicator", "sccp.calling.ssni",
FT_UINT8, BASE_HEX, VALS(sccp_ai_ssni_values), ITU_SSN_INDICATOR_MASK,
"", HFILL}},
{ &hf_sccp_calling_itu_point_code_indicator,
{ "Point Code Indicator", "sccp.calling.pci",
FT_UINT8, BASE_HEX, VALS(sccp_ai_pci_values), ITU_PC_INDICATOR_MASK,
"", HFILL}},
{ &hf_sccp_calling_ansi_ssn_indicator,
{ "SubSystem Number Indicator", "sccp.calling.ssni",
FT_UINT8, BASE_HEX, VALS(sccp_ai_ssni_values), ANSI_SSN_INDICATOR_MASK,
"", HFILL}},
{ &hf_sccp_calling_ansi_point_code_indicator,
{ "Point Code Indicator", "sccp.calling.pci",
FT_UINT8, BASE_HEX, VALS(sccp_ai_pci_values), ANSI_PC_INDICATOR_MASK,
"", HFILL}},
{ &hf_sccp_calling_ssn,
{ "SubSystem Number", "sccp.calling.ssn",
FT_UINT8, BASE_DEC, VALS(sccp_ssn_values), 0x0,
"", HFILL}},
{ &hf_sccp_calling_itu_pc,
{ "PC", "sccp.calling.pc",
FT_UINT16, BASE_DEC, NULL, ITU_PC_MASK,
"", HFILL}},
{ &hf_sccp_calling_ansi_pc,
{ "PC", "sccp.calling.ansi_pc",
FT_STRING, BASE_NONE, NULL, 0x0,
"", HFILL}},
{ &hf_sccp_calling_chinese_pc,
{ "PC", "sccp.calling.chinese_pc",
FT_STRING, BASE_NONE, NULL, 0x0,
"", HFILL}},
{ &hf_sccp_calling_pc_network,
{ "PC Network",
"sccp.calling.network",
FT_UINT24, BASE_DEC, NULL, ANSI_NETWORK_MASK,
"", HFILL }},
{ &hf_sccp_calling_pc_cluster,
{ "PC Cluster",
"sccp.calling.cluster",
FT_UINT24, BASE_DEC, NULL, ANSI_CLUSTER_MASK,
"", HFILL }},
{ &hf_sccp_calling_pc_member,
{ "PC Member",
"sccp.calling.member",
FT_UINT24, BASE_DEC, NULL, ANSI_MEMBER_MASK,
"", HFILL }},
{ &hf_sccp_calling_gt_nai,
{ "Nature of Address Indicator",
"sccp.calling.nai",
FT_UINT8, BASE_HEX, VALS(sccp_nai_values), GT_NAI_MASK,
"", HFILL }},
{ &hf_sccp_calling_gt_oe,
{ "Odd/Even Indicator",
"sccp.calling.oe",
FT_UINT8, BASE_HEX, VALS(sccp_oe_values), GT_OE_MASK,
"", HFILL }},
{ &hf_sccp_calling_gt_tt,
{ "Translation Type",
"sccp.calling.tt",
FT_UINT8, BASE_HEX, NULL, 0x0,
"", HFILL }},
{ &hf_sccp_calling_gt_np,
{ "Numbering Plan",
"sccp.calling.np",
FT_UINT8, BASE_HEX, VALS(sccp_np_values), GT_NP_MASK,
"", HFILL }},
{ &hf_sccp_calling_gt_es,
{ "Encoding Scheme",
"sccp.calling.es",
FT_UINT8, BASE_HEX, VALS(sccp_es_values), GT_ES_MASK,
"", HFILL }},
{ &hf_sccp_calling_gt_digits,
{ "GT Digits",
"sccp.calling.digits",
FT_STRING, BASE_NONE, NULL, 0x0,
"", HFILL }},
{ &hf_sccp_dlr,
{ "Destination Local Reference", "sccp.dlr",
FT_UINT24, BASE_HEX, NULL, 0x0,
"", HFILL}},
{ &hf_sccp_slr,
{ "Source Local Reference", "sccp.slr",
FT_UINT24, BASE_HEX, NULL, 0x0,
"", HFILL}},
{ &hf_sccp_class,
{ "Class", "sccp.class",
FT_UINT8, BASE_HEX, NULL, CLASS_CLASS_MASK,
"", HFILL}},
{ &hf_sccp_handling,
{ "Message handling", "sccp.handling",
FT_UINT8, BASE_HEX, VALS(sccp_class_handling_values), CLASS_SPARE_HANDLING_MASK,
"", HFILL}},
{ &hf_sccp_more,
{ "More data", "sccp.more",
FT_UINT8, BASE_HEX, VALS(sccp_segmenting_reassembling_values), SEGMENTING_REASSEMBLING_MASK,
"", HFILL}},
{ &hf_sccp_rsn,
{ "Receive Sequence Number", "sccp.rsn",
FT_UINT8, BASE_HEX, NULL, RSN_MASK,
"", HFILL}},
{ &hf_sccp_sequencing_segmenting_ssn,
{ "Sequencing Segmenting: Send Sequence Number", "sccp.sequencing_segmenting.ssn",
FT_UINT8, BASE_HEX, NULL, SEND_SEQUENCE_NUMBER_MASK,
"", HFILL}},
{ &hf_sccp_sequencing_segmenting_rsn,
{ "Sequencing Segmenting: Receive Sequence Number", "sccp.sequencing_segmenting.rsn",
FT_UINT8, BASE_HEX, NULL, RECEIVE_SEQUENCE_NUMBER_MASK,
"", HFILL}},
{ &hf_sccp_sequencing_segmenting_more,
{ "Sequencing Segmenting: More", "sccp.sequencing_segmenting.more",
FT_UINT8, BASE_HEX, VALS(sccp_segmenting_reassembling_values), SEQUENCING_SEGMENTING_MORE_MASK,
"", HFILL}},
{ &hf_sccp_credit,
{ "Credit", "sccp.credit",
FT_UINT8, BASE_HEX, NULL, 0x0,
"", HFILL}},
{ &hf_sccp_release_cause,
{ "Release Cause", "sccp.release_cause",
FT_UINT8, BASE_HEX, VALS(sccp_release_cause_values), 0x0,
"", HFILL}},
{ &hf_sccp_return_cause,
{ "Return Cause", "sccp.return_cause",
FT_UINT8, BASE_HEX, VALS(sccp_return_cause_values), 0x0,
"", HFILL}},
{ &hf_sccp_reset_cause,
{ "Reset Cause", "sccp.reset_cause",
FT_UINT8, BASE_HEX, VALS(sccp_reset_cause_values), 0x0,
"", HFILL}},
{ &hf_sccp_error_cause,
{ "Error Cause", "sccp.error_cause",
FT_UINT8, BASE_HEX, VALS(sccp_error_cause_values), 0x0,
"", HFILL}},
{ &hf_sccp_refusal_cause,
{ "Refusal Cause", "sccp.refusal_cause",
FT_UINT8, BASE_HEX, VALS(sccp_refusal_cause_values), 0x0,
"", HFILL}},
{ &hf_sccp_segmentation_first,
{ "Segmentation: First", "sccp.segmentation.first",
FT_UINT8, BASE_HEX, VALS(sccp_segmentation_first_segment_values), SEGMENTATION_FIRST_SEGMENT_MASK,
"", HFILL}},
{ &hf_sccp_segmentation_class,
{ "Segmentation: Class", "sccp.segmentation.class",
FT_UINT8, BASE_HEX, VALS(sccp_segmentation_class_values), SEGMENTATION_CLASS_MASK,
"", HFILL}},
{ &hf_sccp_segmentation_remaining,
{ "Segmentation: Remaining", "sccp.segmentation.remaining",
FT_UINT8, BASE_HEX, NULL, SEGMENTATION_REMAINING_MASK,
"", HFILL}},
{ &hf_sccp_segmentation_slr,
{ "Segmentation: Source Local Reference", "sccp.segmentation.slr",
FT_UINT24, BASE_HEX, NULL, 0x0,
"", HFILL}},
{ &hf_sccp_hop_counter,
{ "Hop Counter", "sccp.hops",
FT_UINT8, BASE_HEX, NULL, 0x0,
"", HFILL}},
{ &hf_sccp_importance,
{ "Importance", "sccp.importance",
FT_UINT8, BASE_HEX, NULL, IMPORTANCE_IMPORTANCE_MASK,
"", HFILL}},
/* ISNI is ANSI only */
{ &hf_sccp_ansi_isni_mi,
{ "ISNI Mark for Identification Indicator", "sccp.isni.mi",
FT_UINT8, BASE_HEX, VALS(sccp_isni_mark_for_id_values), ANSI_ISNI_MI_MASK,
"", HFILL}},
{ &hf_sccp_ansi_isni_iri,
{ "ISNI Routing Indicator", "sccp.isni.iri",
FT_UINT8, BASE_HEX, VALS(sccp_isni_iri_values), ANSI_ISNI_IRI_MASK,
"", HFILL}},
{ &hf_sccp_ansi_isni_ti,
{ "ISNI Type Indicator", "sccp.isni.ti",
FT_UINT8, BASE_HEX, VALS(sccp_isni_ti_values), ANSI_ISNI_TI_MASK,
"", HFILL}},
{ &hf_sccp_ansi_isni_netspec,
{ "ISNI Network Specific (Type 1)", "sccp.isni.netspec",
FT_UINT8, BASE_HEX, NULL, ANSI_ISNI_NETSPEC_MASK,
"", HFILL}},
{ &hf_sccp_ansi_isni_counter,
{ "ISNI Counter", "sccp.isni.counter",
FT_UINT8, BASE_HEX, NULL, ANSI_ISNI_COUNTER_MASK,
"", HFILL}},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_sccp,
&ett_sccp_called,
&ett_sccp_called_ai,
&ett_sccp_called_pc,
&ett_sccp_called_gt,
&ett_sccp_calling,
&ett_sccp_calling_ai,
&ett_sccp_calling_pc,
&ett_sccp_calling_gt,
&ett_sccp_sequencing_segmenting,
&ett_sccp_segmentation,
&ett_sccp_ansi_isni_routing_control,
};
/* Register the protocol name and description */
proto_sccp = proto_register_protocol("Signalling Connection Control Part",
"SCCP", "sccp");
register_dissector("sccp", dissect_sccp, proto_sccp);
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array(proto_sccp, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
sccp_ssn_dissector_table = register_dissector_table("sccp.ssn", "SCCP SSN", FT_UINT8, BASE_DEC);
register_heur_dissector_list("sccp", &heur_subdissector_list);
sccp_module = prefs_register_protocol(proto_sccp, NULL);
prefs_register_uint_preference(sccp_module, "source_pc",
"Source PC",
"The source point code (usually MSC) (to determine whether message is uplink or downlink)",
16, &sccp_source_pc_global);
prefs_register_bool_preference(sccp_module, "show_length",
"Show length",
"Show parameter length in the protocol tree",
&sccp_show_length);
}
void
proto_reg_handoff_sccp(void)
{
dissector_handle_t sccp_handle;
sccp_handle = find_dissector("sccp");
dissector_add("mtp3.service_indicator", SCCP_SI, sccp_handle);
dissector_add("m3ua.protocol_data_si", SCCP_SI, sccp_handle);
data_handle = find_dissector("data");
}
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