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wireshark/asn1/h460/packet-h460-template.c

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/* packet-h460.c
* Routines for H.460.x packet dissection
* 2007 Tomas Kukosa
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <epan/packet.h>
#include <epan/oids.h>
#include <epan/asn1.h>
#include "packet-per.h"
#include "packet-h225.h"
#include "packet-h235.h"
#include "packet-h245.h"
#define PNAME "H.460 Supplementary Services"
#define PSNAME "H.460"
#define PFNAME "h460"
void proto_register_h460(void);
void proto_reg_handoff_h460(void);
/* Initialize the protocol and registered fields */
static int proto_h460 = -1;
#include "packet-h460-hf.c"
/* Initialize the subtree pointers */
#include "packet-h460-ett.c"
/* Subdissectors */
static dissector_handle_t q931_ie_handle = NULL;
static dissector_handle_t h225_ras_handle = NULL;
#include "packet-h460-fn.c"
static int
dissect_ies(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_) {
int offset = 0;
if (q931_ie_handle) {
call_dissector(q931_ie_handle, tvb, pinfo, tree);
offset += tvb_reported_length_remaining(tvb, offset);
}
return offset;
}
static int
dissect_ras(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_) {
int offset = 0;
if (h225_ras_handle) {
call_dissector(h225_ras_handle, tvb, pinfo, tree);
offset += tvb_reported_length_remaining(tvb, offset);
}
return offset;
}
typedef struct _h460_feature_t {
guint32 opt;
const gchar *id;
const gchar *name;
new_dissector_t content_pdu;
/*---*/
const gchar *key_gd;
const gchar *key_fd;
const gchar *key_gm;
const gchar *key_gi;
dissector_handle_t content_hnd;
} h460_feature_t;
/* Fill in the items after content_pdu */
#define FFILL NULL, NULL, NULL, NULL, NULL
/* options */
#define GD 0x01 /* present in H.225 GenericData */
#define FD 0x02 /* present in H.225 FeatureDescriptor */
#define GM 0x04 /* present in H.245 GenericMessage */
#define GI 0x08 /* present in H.245 GenericInformation */
static h460_feature_t h460_feature_tab[] = {
/* H.460.3 */
{ GD|FD, "2", "Number Portability", NULL, FFILL },
{ GD|FD, "2/1", "NumberPortabilityData", dissect_h460_2_NumberPortabilityInfo_PDU, FFILL },
/* H.460.3 */
{ GD|FD, "3", "Circuit Status", NULL, FFILL },
{ GD|FD, "3/1", "Circuit Status Map", dissect_h460_3_CircuitStatus_PDU, FFILL },
/* H.460.4 */
{ GD|FD, "4", "CallPriorityDesignation", NULL, FFILL },
{ GD|FD, "4/1", "CallPriorityRequest", dissect_h460_4_CallPriorityInfo_PDU, FFILL },
{ GD|FD, "4/2", "CallPriorityConfirm", dissect_h460_4_CallPriorityInfo_PDU, FFILL },
{ GD|FD, "4/3", "Country/InternationalNetworkCallOriginationRequest", dissect_h460_4_CountryInternationalNetworkCallOriginationIdentification_PDU, FFILL },
{ GD|FD, "4/4", "Country/InternationalNetworkCallOriginationConfirm", dissect_h460_4_CountryInternationalNetworkCallOriginationIdentification_PDU, FFILL },
/* H.460.5 */
{ GD|FD, "5", "DuplicateIEs", NULL, FFILL },
{ GD|FD, "5/1", "IEsString", dissect_ies, FFILL },
/* H.460.6 */
{ GD|FD, "6", "Extended Fast Connect", NULL, FFILL },
{ GD|FD, "6/1", "EFC Proposal", NULL, FFILL },
{ GD|FD, "6/2", "EFC Close All Media Channels", NULL, FFILL },
{ GD|FD, "6/3", "EFC Request New Proposals", NULL, FFILL },
{ GD|FD, "6/4", "EFC Require Symmetric Operation", NULL, FFILL },
/* H.460.7 */
{ GD|FD, "7", "Digit Maps", NULL, FFILL },
{ FD, "7/1", "Digit Maps Length", NULL, FFILL },
{ FD, "7/2", "Digit Map Length for Overlapped Sending", NULL, FFILL },
{ FD, "7/3", "HTTP Digit Maps Download Capability", NULL, FFILL },
{ GD , "7/1", "Start Timer", NULL, FFILL },
{ GD , "7/2", "Short Timer", NULL, FFILL },
{ GD , "7/3", "Long Timer", NULL, FFILL },
{ GD , "7/4", "Digit Map String", NULL, FFILL },
{ GD , "7/5", "ToN Associated Digit Map", NULL, FFILL },
{ GD , "7/5/1", "Type of Number", NULL, FFILL },
{ GD , "7/5/2", "Digit Map Strings for ToN", NULL, FFILL },
{ GD , "7/6", "Digit Map URL", NULL, FFILL },
/* H.460.8 */
{ GD|FD, "8", "Querying for Alternate Routes", NULL, FFILL },
{ GD|FD, "8/1", "Query Count", NULL, FFILL },
{ GD|FD, "8/2", "Call Termination Cause", NULL, FFILL },
/* H.460.9 */
{ GD|FD, "9", "QoS-monitoring Reporting", NULL, FFILL },
{ GD|FD, "9/0", "qosMonitoringFinalOnly", NULL, FFILL },
{ GD|FD, "9/1", "qosMonitoringReportData", dissect_h460_9_QosMonitoringReportData_PDU, FFILL },
{ GD|FD, "9/2", "qosMonitoringExtendedRTPMetrics", dissect_h460_9_ExtendedRTPMetrics_PDU, FFILL },
/* H.460.10 */
{ GD|FD, "10", "Call Party Category", NULL, FFILL },
{ GD|FD, "10/1", "Call party category info", dissect_h460_10_CallPartyCategoryInfo_PDU, FFILL },
/* H.460.11 */
{ GD|FD, "11", "Delayed Call Establishment", NULL, FFILL },
{ GD|FD, "11/1", "Delay Point Indicator", NULL, FFILL },
{ GD|FD, "11/2", "Implicit DCE Release", NULL, FFILL },
{ GD|FD, "11/3", "Delay Point Reached", NULL, FFILL },
{ GD|FD, "11/4", "DCE Release", NULL, FFILL },
/* H.460.12 */
{ GD|FD, "12", "Glare Control Indicator", NULL, FFILL },
{ GD|FD, "12/1", "Glare Control Indicator Parameter", NULL, FFILL },
/* H.460.13 */
{ GD|FD, "13", "Called User Release Control", NULL, FFILL },
{ GD|FD, "13/1", "Called User Release Control", NULL, FFILL },
/* H.460.14 */
{ GD|FD, "14", "Multi-Level Precedence and Preemption", NULL, FFILL },
{ GD|FD, "14/1", "MLPP Information", dissect_h460_14_MLPPInfo_PDU, FFILL },
/* H.460.15 */
{ GD|FD, "15", "Call signalling transport channel suspension and redirection", NULL, FFILL },
{ GD|FD, "15/1", "Signalling channel suspend and redirect", dissect_h460_15_SignallingChannelData_PDU, FFILL },
/* H.460.16 */
{ GD|FD, "16", "Multiple-message Release Sequence", NULL, FFILL },
{ GD|FD, "16/1", "MMRS use required", NULL, FFILL },
{ GD|FD, "16/2", "MMRS procedure", NULL, FFILL },
{ GD|FD, "16/3", "MMRS additional IEs", dissect_ies, FFILL },
/* H.460.17 */
{ GD|FD, "17", "RAS over H.225.0", NULL, FFILL },
{ GD|FD, "17/1", "RAS message", dissect_ras, FFILL },
/* H.460.18 */
{ GD|FD , "18", "Signalling Traversal", NULL, FFILL },
{ GD|FD , "18/1", "IncomingCallIndication", dissect_h460_18_IncomingCallIndication_PDU, FFILL },
{ GD|FD , "18/2", "LRQKeepAliveData", dissect_h460_18_LRQKeepAliveData_PDU, FFILL },
{ GM, "0.0.8.460.18.0.1", "Signalling Traversal", NULL, FFILL },
{ GM, "0.0.8.460.18.0.1-1", "connectionCorrelation", NULL, FFILL },
{ GM, "0.0.8.460.18.0.1-1/1", "callIdentifier", NULL, FFILL },
{ GM, "0.0.8.460.18.0.1-1/2", "answerCall", NULL, FFILL },
/* H.460.19 */
{ GD|FD , "19", "mediaNATFWTraversal", NULL, FFILL },
{ GD|FD , "19/1", "supportTransmitMultiplexedMedia", NULL, FFILL },
{ GD|FD , "19/2", "mediaTraversalServer", NULL, FFILL },
{ GI, "0.0.8.460.19.0.1", "mediaNATFWTraversal", NULL, FFILL },
{ GI, "0.0.8.460.19.0.1/1", "Traversal Parameters", dissect_h460_19_TraversalParameters_PDU, FFILL },
/* H.460.20 */
{ GD|FD, "20", "LocationSourceAddress", NULL, FFILL },
{ GD|FD, "20/1", "LocationSourceAddress", dissect_h225_ExtendedAliasAddress_PDU, FFILL },
/* H.460.21 */
{ GD|FD, "21", "Message Broadcast", NULL, FFILL },
{ GD|FD, "21/1", "MessageBroadcastParameter", dissect_h460_21_CapabilityAdvertisement_PDU, FFILL },
/* H.460.22 */
{ GD|FD, "22", "securityProtocolNegotiation", NULL, FFILL },
{ GD|FD, "22/1", "tlsSecurityProtocol", NULL, FFILL },
{ GD|FD, "22/1/1", "priority", NULL, FFILL },
{ GD|FD, "22/1/2", "connectionAddress", NULL, FFILL },
{ GD|FD, "22/2", "ipsecSecurityProtocol", NULL, FFILL },
{ GD|FD, "22/2/1", "priority", NULL, FFILL },
{ 0, NULL, NULL, NULL, FFILL },
};
static h460_feature_t *find_ftr(const gchar *key) {
h460_feature_t *ftr = NULL;
h460_feature_t *f;
for (f=h460_feature_tab; f->id; f++) {
if (f->key_gd && !strcmp(key, f->key_gd)) { ftr = f; break; }
if (f->key_fd && !strcmp(key, f->key_fd)) { ftr = f; break; }
if (f->key_gm && !strcmp(key, f->key_gm)) { ftr = f; break; }
if (f->key_gi && !strcmp(key, f->key_gi)) { ftr = f; break; }
}
return ftr;
}
/*--- dissect_h460_name -------------------------------------------*/
static int
dissect_h460_name(tvbuff_t *tvb _U_, packet_info *pinfo, proto_tree *tree, void *data) {
int offset = 0;
asn1_ctx_t *actx;
h460_feature_t *ftr;
/* Reject the packet if data is NULL */
if (data == NULL)
return 0;
actx = get_asn1_ctx(data);
DISSECTOR_ASSERT(actx);
if (tree) {
ftr = find_ftr(pinfo->match_string);
if (ftr) {
proto_item_append_text(actx->created_item, " - %s", ftr->name);
proto_item_append_text(proto_item_get_parent(proto_tree_get_parent(tree)), ": %s", ftr->name);
} else {
proto_item_append_text(actx->created_item, " - unknown(%s)", pinfo->match_string);
}
}
return offset;
}
/*--- proto_register_h460 ----------------------------------------------*/
void proto_register_h460(void) {
h460_feature_t *ftr;
/* List of fields */
static hf_register_info hf[] = {
#include "packet-h460-hfarr.c"
};
/* List of subtrees */
static gint *ett[] = {
#include "packet-h460-ettarr.c"
};
/* Register protocol */
proto_h460 = proto_register_protocol(PNAME, PSNAME, PFNAME);
/* Register fields and subtrees */
proto_register_field_array(proto_h460, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
for (ftr=h460_feature_tab; ftr->id; ftr++) {
if (ftr->opt & GD) ftr->key_gd = g_strdup_printf("GenericData/%s", ftr->id);
if (ftr->opt & FD) ftr->key_fd = g_strdup_printf("FeatureDescriptor/%s", ftr->id);
if (ftr->opt & GM) ftr->key_gm = g_strdup_printf("GenericMessage/%s", ftr->id);
if (ftr->opt & GI) ftr->key_gi = g_strdup_printf("GenericInformation/%s", ftr->id);
if (ftr->content_pdu) ftr->content_hnd = create_dissector_handle(ftr->content_pdu, proto_h460);
}
}
/*--- proto_reg_handoff_h460 -------------------------------------------*/
void proto_reg_handoff_h460(void)
{
h460_feature_t *ftr;
dissector_handle_t h460_name_handle;
q931_ie_handle = find_dissector("q931.ie");
h225_ras_handle = find_dissector("h225.ras");
h460_name_handle = create_dissector_handle(dissect_h460_name, proto_h460);
for (ftr=h460_feature_tab; ftr->id; ftr++) {
if (ftr->key_gd) dissector_add_string("h225.gef.name", ftr->key_gd, h460_name_handle);
if (ftr->key_fd) dissector_add_string("h225.gef.name", ftr->key_fd, h460_name_handle);
if (ftr->key_gm) dissector_add_string("h245.gef.name", ftr->key_gm, h460_name_handle);
if (ftr->key_gi) dissector_add_string("h245.gef.name", ftr->key_gi, h460_name_handle);
if (ftr->content_hnd) {
if (ftr->key_gd) dissector_add_string("h225.gef.content", ftr->key_gd, ftr->content_hnd);
if (ftr->key_fd) dissector_add_string("h225.gef.content", ftr->key_fd, ftr->content_hnd);
if (ftr->key_gm) dissector_add_string("h245.gef.content", ftr->key_gm, ftr->content_hnd);
if (ftr->key_gi) dissector_add_string("h245.gef.content", ftr->key_gi, ftr->content_hnd);
}
}
}
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