/* packet-h460.c * Routines for H.460.x packet dissection * 2007 Tomas Kukosa * * Wireshark - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * SPDX-License-Identifier: GPL-2.0-or-later */ #include "config.h" #include #include #include #include #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; #include "packet-h460-hf.c" /* Initialize the subtree pointers */ #include "packet-h460-ett.c" /* Main dissector handle */ static dissector_handle_t h460_name_handle; /* Subdissectors */ static dissector_handle_t q931_ie_handle; static dissector_handle_t h225_ras_handle; #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 { uint32_t opt; const char *id; const char *name; dissector_t content_pdu; /*---*/ const char *key_gd; const char *key_fd; const char *key_gm; const char *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 char *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 int *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)); h460_name_handle = register_dissector(PFNAME, dissect_h460_name, proto_h460); for (ftr=h460_feature_tab; ftr->id; ftr++) { if (ftr->opt & GD) ftr->key_gd = wmem_strdup_printf(wmem_epan_scope(), "GenericData/%s", ftr->id); if (ftr->opt & FD) ftr->key_fd = wmem_strdup_printf(wmem_epan_scope(), "FeatureDescriptor/%s", ftr->id); if (ftr->opt & GM) ftr->key_gm = wmem_strdup_printf(wmem_epan_scope(), "GenericMessage/%s", ftr->id); if (ftr->opt & GI) ftr->key_gi = wmem_strdup_printf(wmem_epan_scope(), "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; q931_ie_handle = find_dissector_add_dependency("q931.ie", proto_h460); h225_ras_handle = find_dissector_add_dependency("h225.ras", 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); } } }