![Chris Maynard](/assets/img/avatar_default.png)
(Arguably it's the responsibility of the dissector passing this information to set the signature correctly so if there's an invalid signature, the bug is with the calling dissector and not with the one receiving the invalid signature.) svn path=/trunk/; revision=53964
302 lines
12 KiB
C
302 lines
12 KiB
C
/* packet-h460.c
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* Routines for H.460.x packet dissection
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* 2007 Tomas Kukosa
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include <glib.h>
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#include <epan/packet.h>
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#include <epan/oids.h>
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#include <epan/asn1.h>
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#include <string.h>
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#include "packet-per.h"
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#include "packet-h225.h"
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#include "packet-h235.h"
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#include "packet-h245.h"
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#define PNAME "H.460 Supplementary Services"
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#define PSNAME "H.460"
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#define PFNAME "h460"
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void proto_register_h460(void);
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void proto_reg_handoff_h460(void);
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/* Initialize the protocol and registered fields */
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static int proto_h460 = -1;
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#include "packet-h460-hf.c"
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/* Initialize the subtree pointers */
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#include "packet-h460-ett.c"
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/* Subdissectors */
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static dissector_handle_t q931_ie_handle = NULL;
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static dissector_handle_t h225_ras_handle = NULL;
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#include "packet-h460-fn.c"
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static int
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dissect_ies(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_) {
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int offset = 0;
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if (q931_ie_handle) {
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call_dissector(q931_ie_handle, tvb, pinfo, tree);
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offset += tvb_length_remaining(tvb, offset);
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}
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return offset;
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}
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static int
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dissect_ras(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_) {
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int offset = 0;
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if (h225_ras_handle) {
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call_dissector(h225_ras_handle, tvb, pinfo, tree);
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offset += tvb_length_remaining(tvb, offset);
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}
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return offset;
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}
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typedef struct _h460_feature_t {
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guint32 opt;
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const gchar *id;
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const gchar *name;
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new_dissector_t content_pdu;
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/*---*/
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const gchar *key_gd;
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const gchar *key_fd;
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const gchar *key_gm;
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const gchar *key_gi;
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dissector_handle_t content_hnd;
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} h460_feature_t;
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/* Fill in the items after content_pdu */
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#define FFILL NULL, NULL, NULL, NULL, NULL
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/* options */
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#define GD 0x01 /* present in H.225 GenericData */
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#define FD 0x02 /* present in H.225 FeatureDescriptor */
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#define GM 0x04 /* present in H.245 GenericMessage */
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#define GI 0x08 /* present in H.245 GenericInformation */
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static h460_feature_t h460_feature_tab[] = {
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/* H.460.3 */
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{ GD|FD, "2", "Number Portability", NULL, FFILL },
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{ GD|FD, "2/1", "NumberPortabilityData", dissect_h460_2_NumberPortabilityInfo_PDU, FFILL },
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/* H.460.3 */
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{ GD|FD, "3", "Circuit Status", NULL, FFILL },
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{ GD|FD, "3/1", "Circuit Status Map", dissect_h460_3_CircuitStatus_PDU, FFILL },
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/* H.460.4 */
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{ GD|FD, "4", "CallPriorityDesignation", NULL, FFILL },
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{ GD|FD, "4/1", "CallPriorityRequest", dissect_h460_4_CallPriorityInfo_PDU, FFILL },
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{ GD|FD, "4/2", "CallPriorityConfirm", dissect_h460_4_CallPriorityInfo_PDU, FFILL },
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{ GD|FD, "4/3", "Country/InternationalNetworkCallOriginationRequest", dissect_h460_4_CountryInternationalNetworkCallOriginationIdentification_PDU, FFILL },
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{ GD|FD, "4/4", "Country/InternationalNetworkCallOriginationConfirm", dissect_h460_4_CountryInternationalNetworkCallOriginationIdentification_PDU, FFILL },
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/* H.460.5 */
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{ GD|FD, "5", "DuplicateIEs", NULL, FFILL },
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{ GD|FD, "5/1", "IEsString", dissect_ies, FFILL },
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/* H.460.6 */
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{ GD|FD, "6", "Extended Fast Connect", NULL, FFILL },
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{ GD|FD, "6/1", "EFC Proposal", NULL, FFILL },
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{ GD|FD, "6/2", "EFC Close All Media Channels", NULL, FFILL },
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{ GD|FD, "6/3", "EFC Request New Proposals", NULL, FFILL },
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{ GD|FD, "6/4", "EFC Require Symmetric Operation", NULL, FFILL },
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/* H.460.7 */
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{ GD|FD, "7", "Digit Maps", NULL, FFILL },
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{ FD, "7/1", "Digit Maps Length", NULL, FFILL },
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{ FD, "7/2", "Digit Map Length for Overlapped Sending", NULL, FFILL },
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{ FD, "7/3", "HTTP Digit Maps Download Capability", NULL, FFILL },
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{ GD , "7/1", "Start Timer", NULL, FFILL },
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{ GD , "7/2", "Short Timer", NULL, FFILL },
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{ GD , "7/3", "Long Timer", NULL, FFILL },
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{ GD , "7/4", "Digit Map String", NULL, FFILL },
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{ GD , "7/5", "ToN Associated Digit Map", NULL, FFILL },
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{ GD , "7/5/1", "Type of Number", NULL, FFILL },
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{ GD , "7/5/2", "Digit Map Strings for ToN", NULL, FFILL },
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{ GD , "7/6", "Digit Map URL", NULL, FFILL },
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/* H.460.8 */
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{ GD|FD, "8", "Querying for Alternate Routes", NULL, FFILL },
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{ GD|FD, "8/1", "Query Count", NULL, FFILL },
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{ GD|FD, "8/2", "Call Termination Cause", NULL, FFILL },
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/* H.460.9 */
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{ GD|FD, "9", "QoS-monitoring Reporting", NULL, FFILL },
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{ GD|FD, "9/0", "qosMonitoringFinalOnly", NULL, FFILL },
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{ GD|FD, "9/1", "qosMonitoringReportData", dissect_h460_9_QosMonitoringReportData_PDU, FFILL },
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{ GD|FD, "9/2", "qosMonitoringExtendedRTPMetrics", dissect_h460_9_ExtendedRTPMetrics_PDU, FFILL },
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/* H.460.10 */
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{ GD|FD, "10", "Call Party Category", NULL, FFILL },
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{ GD|FD, "10/1", "Call party category info", dissect_h460_10_CallPartyCategoryInfo_PDU, FFILL },
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/* H.460.11 */
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{ GD|FD, "11", "Delayed Call Establishment", NULL, FFILL },
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{ GD|FD, "11/1", "Delay Point Indicator", NULL, FFILL },
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{ GD|FD, "11/2", "Implicit DCE Release", NULL, FFILL },
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{ GD|FD, "11/3", "Delay Point Reached", NULL, FFILL },
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{ GD|FD, "11/4", "DCE Release", NULL, FFILL },
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/* H.460.12 */
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{ GD|FD, "12", "Glare Control Indicator", NULL, FFILL },
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{ GD|FD, "12/1", "Glare Control Indicator Parameter", NULL, FFILL },
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/* H.460.13 */
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{ GD|FD, "13", "Called User Release Control", NULL, FFILL },
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{ GD|FD, "13/1", "Called User Release Control", NULL, FFILL },
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/* H.460.14 */
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{ GD|FD, "14", "Multi-Level Precedence and Preemption", NULL, FFILL },
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{ GD|FD, "14/1", "MLPP Information", dissect_h460_14_MLPPInfo_PDU, FFILL },
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/* H.460.15 */
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{ GD|FD, "15", "Call signalling transport channel suspension and redirection", NULL, FFILL },
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{ GD|FD, "15/1", "Signalling channel suspend and redirect", dissect_h460_15_SignallingChannelData_PDU, FFILL },
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/* H.460.16 */
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{ GD|FD, "16", "Multiple-message Release Sequence", NULL, FFILL },
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{ GD|FD, "16/1", "MMRS use required", NULL, FFILL },
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{ GD|FD, "16/2", "MMRS procedure", NULL, FFILL },
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{ GD|FD, "16/3", "MMRS additional IEs", dissect_ies, FFILL },
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/* H.460.17 */
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{ GD|FD, "17", "RAS over H.225.0", NULL, FFILL },
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{ GD|FD, "17/1", "RAS message", dissect_ras, FFILL },
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/* H.460.18 */
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{ GD|FD , "18", "Signalling Traversal", NULL, FFILL },
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{ GD|FD , "18/1", "IncomingCallIndication", dissect_h460_18_IncomingCallIndication_PDU, FFILL },
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{ GD|FD , "18/2", "LRQKeepAliveData", dissect_h460_18_LRQKeepAliveData_PDU, FFILL },
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{ GM, "0.0.8.460.18.0.1", "Signalling Traversal", NULL, FFILL },
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{ GM, "0.0.8.460.18.0.1-1", "connectionCorrelation", NULL, FFILL },
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{ GM, "0.0.8.460.18.0.1-1/1", "callIdentifier", NULL, FFILL },
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{ GM, "0.0.8.460.18.0.1-1/2", "answerCall", NULL, FFILL },
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/* H.460.19 */
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{ GD|FD , "19", "mediaNATFWTraversal", NULL, FFILL },
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{ GD|FD , "19/1", "supportTransmitMultiplexedMedia", NULL, FFILL },
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{ GD|FD , "19/2", "mediaTraversalServer", NULL, FFILL },
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{ GI, "0.0.8.460.19.0.1", "mediaNATFWTraversal", NULL, FFILL },
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{ GI, "0.0.8.460.19.0.1/1", "Traversal Parameters", dissect_h460_19_TraversalParameters_PDU, FFILL },
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/* H.460.20 */
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{ GD|FD, "20", "LocationSourceAddress", NULL, FFILL },
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{ GD|FD, "20/1", "LocationSourceAddress", dissect_h225_ExtendedAliasAddress_PDU, FFILL },
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/* H.460.21 */
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{ GD|FD, "21", "Message Broadcast", NULL, FFILL },
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{ GD|FD, "21/1", "MessageBroadcastParameter", dissect_h460_21_CapabilityAdvertisement_PDU, FFILL },
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/* H.460.22 */
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{ GD|FD, "22", "securityProtocolNegotiation", NULL, FFILL },
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{ GD|FD, "22/1", "tlsSecurityProtocol", NULL, FFILL },
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{ GD|FD, "22/1/1", "priority", NULL, FFILL },
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{ GD|FD, "22/1/2", "connectionAddress", NULL, FFILL },
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{ GD|FD, "22/2", "ipsecSecurityProtocol", NULL, FFILL },
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{ GD|FD, "22/2/1", "priority", NULL, FFILL },
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{ 0, NULL, NULL, NULL, FFILL },
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};
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static h460_feature_t *find_ftr(const gchar *key) {
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h460_feature_t *ftr = NULL;
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h460_feature_t *f;
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for (f=h460_feature_tab; f->id; f++) {
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if (f->key_gd && !strcmp(key, f->key_gd)) { ftr = f; break; }
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if (f->key_fd && !strcmp(key, f->key_fd)) { ftr = f; break; }
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if (f->key_gm && !strcmp(key, f->key_gm)) { ftr = f; break; }
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if (f->key_gi && !strcmp(key, f->key_gi)) { ftr = f; break; }
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}
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return ftr;
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}
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/*--- dissect_h460_name -------------------------------------------*/
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static int
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dissect_h460_name(tvbuff_t *tvb _U_, packet_info *pinfo, proto_tree *tree, void *data) {
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int offset = 0;
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asn1_ctx_t *actx;
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h460_feature_t *ftr;
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/* Reject the packet if data is NULL */
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if (data == NULL)
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return 0;
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actx = get_asn1_ctx(data);
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DISSECTOR_ASSERT(actx);
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if (tree) {
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/* DEBUG */ /*proto_tree_add_text(tree, tvb, 0, 0, "*** DEBUG dissect_h460_name: %s", pinfo->match_string);*/
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ftr = find_ftr(pinfo->match_string);
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/* DEBUG */ /*proto_tree_add_text(tree, tvb, 0, 0, "*** DEBUG dissect_h460_name: ftr %s", (ftr)?ftr->name:"-none-");*/
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if (ftr) {
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proto_item_append_text(actx->created_item, " - %s", ftr->name);
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proto_item_append_text(proto_item_get_parent(proto_tree_get_parent(tree)), ": %s", ftr->name);
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} else {
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proto_item_append_text(actx->created_item, " - unknown(%s)", pinfo->match_string);
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}
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}
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return offset;
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}
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/*--- proto_register_h460 ----------------------------------------------*/
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void proto_register_h460(void) {
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h460_feature_t *ftr;
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/* List of fields */
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static hf_register_info hf[] = {
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#include "packet-h460-hfarr.c"
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};
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/* List of subtrees */
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static gint *ett[] = {
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#include "packet-h460-ettarr.c"
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};
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/* Register protocol */
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proto_h460 = proto_register_protocol(PNAME, PSNAME, PFNAME);
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/* Register fields and subtrees */
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proto_register_field_array(proto_h460, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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for (ftr=h460_feature_tab; ftr->id; ftr++) {
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if (ftr->opt & GD) ftr->key_gd = g_strdup_printf("GenericData/%s", ftr->id);
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if (ftr->opt & FD) ftr->key_fd = g_strdup_printf("FeatureDescriptor/%s", ftr->id);
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if (ftr->opt & GM) ftr->key_gm = g_strdup_printf("GenericMessage/%s", ftr->id);
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if (ftr->opt & GI) ftr->key_gi = g_strdup_printf("GenericInformation/%s", ftr->id);
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if (ftr->content_pdu) ftr->content_hnd = new_create_dissector_handle(ftr->content_pdu, proto_h460);
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}
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}
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/*--- proto_reg_handoff_h460 -------------------------------------------*/
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void proto_reg_handoff_h460(void)
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{
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h460_feature_t *ftr;
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dissector_handle_t h460_name_handle;
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q931_ie_handle = find_dissector("q931.ie");
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h225_ras_handle = find_dissector("h225.ras");
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h460_name_handle = new_create_dissector_handle(dissect_h460_name, proto_h460);
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for (ftr=h460_feature_tab; ftr->id; ftr++) {
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if (ftr->key_gd) dissector_add_string("h225.gef.name", ftr->key_gd, h460_name_handle);
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if (ftr->key_fd) dissector_add_string("h225.gef.name", ftr->key_fd, h460_name_handle);
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if (ftr->key_gm) dissector_add_string("h245.gef.name", ftr->key_gm, h460_name_handle);
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if (ftr->key_gi) dissector_add_string("h245.gef.name", ftr->key_gi, h460_name_handle);
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if (ftr->content_hnd) {
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if (ftr->key_gd) dissector_add_string("h225.gef.content", ftr->key_gd, ftr->content_hnd);
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if (ftr->key_fd) dissector_add_string("h225.gef.content", ftr->key_fd, ftr->content_hnd);
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if (ftr->key_gm) dissector_add_string("h245.gef.content", ftr->key_gm, ftr->content_hnd);
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if (ftr->key_gi) dissector_add_string("h245.gef.content", ftr->key_gi, ftr->content_hnd);
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}
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}
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}
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