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diff --git a/epan/dissectors/asn1/atn-ulcs/atn-ulcs.cnf b/epan/dissectors/asn1/atn-ulcs/atn-ulcs.cnf
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+#.MODULE_IMPORT
+
+#.FIELD_RENAME
+AARQ-apdu/protocol-version aarq-apdu_protocol-version
+AARE-apdu/protocol-version aare-apdu_protocol-version
+RLRE-apdu/reason rlre-apdu_response_reason
+RLRQ-apdu/reason rlrq-apdu_request_reason
+EXTERNALt/encoding/single-ASN1-type externalt_encoding_single-asn1-type
+EXTERNALt/encoding/arbitrary externalt_encoding_arbitrary
+EXTERNALt/encoding/octet-aligned externalt_encoding_octet-aligned
+PDV-list/presentation-data-values/single-ASN1-type pdv-list_presentation-data-values_single-asn1-type
+PDV-list/presentation-data-values/arbitrary pdv-list_presentation-data-values_arbitrary
+#.END
+
+#.PDU
+ Fully-encoded-data
+ ACSE-apdu
+#.END
+
+
+#.FN_PARS Release-request-reason
+ VAL_PTR=&reason
+#.END
+
+
+#.FN_BODY Presentation-context-identifier
+
+ offset = dissect_per_constrained_integer(
+ tvb,
+ offset,
+ actx,
+ tree,
+ hf_index,
+ 1U,
+ 127U,
+ &ulcs_context_value,
+ TRUE);
+
+#.END
+
+#.FN_BODY PDV-list/presentation-data-values/arbitrary
+
+ packet_info * pinfo = actx->pinfo;
+ tvbuff_t *tvb_usr = NULL;
+ proto_tree *atn_ulcs_tree = NULL;
+ atn_conversation_t *atn_cv = NULL;
+ heur_dtbl_entry_t *hdtbl_entry;
+
+ /* extract bitstring into new tvb buffer */
+ offset = dissect_per_bit_string(
+ tvb,
+ offset,
+ actx,
+ tree,
+ hf_index,
+ NO_BOUND,
+ NO_BOUND,
+ FALSE,
+ &tvb_usr,
+ NULL);
+
+ if (tvb_usr) {
+ /* call appropiate dissector for bitstring data */
+ switch(ulcs_context_value){
+ case 1: /* ACSE PDU*/
+ atn_ulcs_tree = proto_tree_add_subtree(
+ root_tree, tvb, offset, 0,
+ ett_atn_acse, NULL, ATN_ACSE_PROTO );
+
+ dissect_ACSE_apdu_PDU(
+ tvb_new_subset_remaining(tvb_usr, 0),
+ pinfo,
+ atn_ulcs_tree, NULL);
+ break;
+ case 3: /* USER data; call subdissector for CM, CPDLC ... */
+
+ /* using dstref for PDV-list only occurrs in DT */
+ atn_cv = find_atn_conversation(
+ &pinfo->dst,
+ pinfo->clnp_dstref,
+ &pinfo->src);
+
+ if(atn_cv) {
+ switch(atn_cv->ae_qualifier){
+ case cma: /* contact management */
+ call_dissector_with_data(
+ atn_cm_handle,
+ tvb_new_subset_remaining(tvb_usr, 0),
+ pinfo,
+ root_tree,
+ NULL);
+ break;
+ case cpdlc: /* plain old cpdlc */
+ case pmcpdlc: /* protected mode cpdlc */
+ call_dissector_with_data(
+ atn_cpdlc_handle,
+ tvb_new_subset_remaining(tvb_usr, 0),
+ pinfo,
+ root_tree,
+ NULL);
+ break;
+ default: /* unknown or unhandled datalink application */
+ dissector_try_heuristic(
+ atn_ulcs_heur_subdissector_list,
+ tvb_new_subset_remaining(tvb_usr,0),
+ actx->pinfo,
+ root_tree,
+ &hdtbl_entry,
+ NULL);
+ break;
+ }
+ }
+ else{
+ dissector_try_heuristic(
+ atn_ulcs_heur_subdissector_list,
+ tvb_new_subset_remaining(tvb_usr,0),
+ actx->pinfo,
+ root_tree,
+ &hdtbl_entry,
+ NULL);
+ }
+ break;
+ default:
+ break;
+ } /* switch(ulcs_context_value) */
+ }
+
+#.END
+
+
+#.FN_BODY Authentication-value/other/other-mechanism-value
+
+ offset=call_ber_oid_callback(
+ object_identifier_id,
+ tvb,
+ offset,
+ actx->pinfo,
+ tree, NULL);
+
+#.END
+
+#.FN_BODY Mechanism-name
+
+ offset = dissect_per_object_identifier(
+ tvb,
+ offset,
+ actx,
+ tree,
+ hf_index,
+ NULL);
+
+#.END
+
+
+#.FN_BODY Authentication-value/other/other-mechanism-value
+
+ offset=call_ber_oid_callback(
+ object_identifier_id,
+ tvb,
+ offset,
+ actx->pinfo,
+ tree, NULL);
+
+#.END
+
+#.FN_BODY AE-qualifier-form2
+ packet_info * pinfo = actx->pinfo;
+ atn_conversation_t *atn_cv = NULL;
+ guint32 ae_qualifier = 0;
+
+ /* dissect ae-qualifier */
+ offset = dissect_per_integer(
+ tvb,
+ offset,
+ actx,
+ tree,
+ hf_index,
+ &ae_qualifier);
+
+
+ /*note: */
+ /* the field "calling-AE-qualifier" is optional, */
+ /* which means that we can exploit it only if it is present. */
+ /* We still depend on heuristical decoding of CM, CPDLC PDU's otherwise. */
+
+ /* AARQ/DT: dstref present, srcref is always zero */
+ if((pinfo->clnp_dstref) && (!pinfo->clnp_srcref)){
+ atn_cv = find_atn_conversation(&pinfo->dst,
+ pinfo->clnp_dstref,
+ &pinfo->src );
+ }
+
+ /* AARQ/CR: srcref present, dstref is always zero */
+ if((!pinfo->clnp_dstref) && (pinfo->clnp_srcref)){
+ atn_cv = find_atn_conversation(&pinfo->src,
+ pinfo->clnp_srcref,
+ &pinfo->dst );
+ }
+
+ if(atn_cv){
+ atn_cv->ae_qualifier = ae_qualifier;
+ }
+#.END
+
+#.FN_BODY AARQ-apdu
+ packet_info * pinfo = actx->pinfo;
+ aarq_data_t *aarq_data = NULL;
+ atn_conversation_t *atn_cv = NULL;
+ guint32 aircraft_24_bit_address = 0;
+
+ /* AARQ/DT: dstref present, srcref is always zero */
+ if((pinfo->clnp_dstref) && (!pinfo->clnp_srcref)){
+
+ atn_cv = find_atn_conversation(
+ &pinfo->dst,
+ pinfo->clnp_dstref,
+ &pinfo->src );
+ if(!atn_cv){
+ atn_cv = wmem_new(wmem_file_scope(), atn_conversation_t);
+ atn_cv->ae_qualifier = unknown;
+ create_atn_conversation(&pinfo->dst,
+ pinfo->clnp_dstref,
+ &pinfo->src ,
+ atn_cv);
+ }
+ }
+
+ /* AARQ/CR: srcref present, dstref is always zero */
+ if((!pinfo->clnp_dstref) && (pinfo->clnp_srcref)){
+ atn_cv = find_atn_conversation(&pinfo->src,
+ pinfo->clnp_srcref,
+ &pinfo->dst );
+ if(!atn_cv){
+ atn_cv = wmem_new(wmem_file_scope(), atn_conversation_t);
+ atn_cv->ae_qualifier = unknown;
+ create_atn_conversation(&pinfo->src,
+ pinfo->clnp_srcref,
+ &pinfo->dst ,
+ atn_cv);
+ }
+ }
+
+ /* conversation is to be created prior to decoding */
+ /* of "AE-qualifier-form2" which takes place here: */
+ %(DEFAULT_BODY)s
+
+
+ /* save AARQ packet data to create a conversation */
+ /* when decoding the following AARE PDU */
+ /* ATN applications CM and CPDLC are air/ground applications */
+ /* so there is always an aircraft (with its 24-bit address) */
+ /* and a ground facility. */
+ /* the assumption is that there is only one open AARQ/AARE */
+ /* dialog per aircraft at a time. */
+ /* the aircraft's 24-bit address is used as a key to each AARQ */
+ /* data. AARQ data is used to create a conversation with */
+ /* air and ground endpoints (based on NSAP's and transport references) */
+ /* when decoding AARE.*/
+ /* note: */
+ /* it may be more robust to create the conversation */
+ /* in the "ositp" dissector an to merely use the conversation here */
+ aircraft_24_bit_address =
+ get_aircraft_24_bit_address_from_nsap(pinfo);
+
+ /* search for aarq entry */
+ aarq_data = (aarq_data_t *) wmem_tree_lookup32(
+ aarq_data_tree,
+ aircraft_24_bit_address);
+
+ if(!aarq_data){ /* aarq data not found, create new record */
+
+ /* alloc aarq data */
+ aarq_data = wmem_new(wmem_file_scope(), aarq_data_t);
+ aarq_data-> aarq_pending = FALSE;
+
+ /* insert aarq data */
+ wmem_tree_insert32(aarq_data_tree ,aircraft_24_bit_address,(void*)aarq_data);
+ }
+
+ /* check for pending AARQ/AARE sequences */
+ /* if "aarq_data-> aarq_pending" is set this means that there is already one */
+ /* AARQ/AARE sequence pending (is unwise to overwrite AARE/AARQ) */
+ if (aarq_data-> aarq_pending == FALSE ) {
+
+ /* init aarq data */
+ memset(aarq_data,0,sizeof(aarq_data_t));
+
+ aarq_data->cv = atn_cv;
+ aarq_data-> aarq_pending = TRUE;
+ }
+
+#.END
+
+
+#.FN_BODY AARE-apdu
+ packet_info * pinfo = actx->pinfo;
+ guint32 aircraft_24_bit_address = 0 ;
+ atn_conversation_t *atn_cv = NULL;
+ aarq_data_t *aarq_data = NULL;
+
+ /* get AARQ data and use it to create a new conversation, */
+ /* the conversation is used along with */
+ /* AARQ's "calling ae qualifier" to determine the */
+ /* type of air/ground application of each subsequent frame.*/
+ /* we use this information to invoke the correct application dissector. */
+ /* note: */
+ /* heuristical decoding of ASN1 will not work for all cases, */
+ /* for there may be CM PDU's which will exactly look like CPDLC PDU'S */
+
+ /* get 24-bit icao address */
+ aircraft_24_bit_address = get_aircraft_24_bit_address_from_nsap(pinfo);
+
+ /* search for aarq entry */
+ aarq_data = (aarq_data_t *) wmem_tree_lookup32(
+ aarq_data_tree,
+ aircraft_24_bit_address);
+
+ /* no aarq data present, do nothing */
+ /* without both ends of the conversation and without */
+ /* the "calling ae-qualifier there is no point in setting up "*/
+ /* a conversation */
+ if(!aarq_data) {
+
+ return offset;
+ }
+
+ /* AARE/DT: dstref present, srcref is always zero */
+ if((pinfo->clnp_dstref) && (!pinfo->clnp_srcref)){
+
+ atn_cv = find_atn_conversation(&pinfo->dst,
+ pinfo->clnp_dstref,
+ &pinfo->src );
+
+ if(!atn_cv){ /* conversation not fond */
+
+ /* DT has only dstref - create new conversation */
+ create_atn_conversation(&pinfo->dst,
+ pinfo->clnp_dstref,
+ &pinfo->src ,
+ aarq_data->cv);
+ }
+ }
+
+ /* AARE/CC: srcref and dstref present */
+ if((pinfo->clnp_dstref) && (pinfo->clnp_srcref)){
+
+ atn_cv = find_atn_conversation(
+ &pinfo->src,
+ pinfo->clnp_srcref,
+ &pinfo->dst);
+
+ if(atn_cv){ /* conversation found. */
+
+ /* create new conversation for dstref */
+ create_atn_conversation(&pinfo->dst,
+ pinfo->clnp_dstref,
+ &pinfo->src ,
+ aarq_data->cv);
+
+ }else { /* no conversation found */
+ /* as CC contains srcref *and* dstref we use both to create new records */
+ create_atn_conversation(&pinfo->src,
+ pinfo->clnp_srcref,
+ &pinfo->dst ,
+ aarq_data->cv);
+ create_atn_conversation(&pinfo->dst,
+ pinfo->clnp_dstref,
+ &pinfo->src ,
+ aarq_data->cv);
+ }
+ }
+
+ /* clear aarq data */
+ memset(aarq_data,0,sizeof(aarq_data_t));
+ aarq_data-> aarq_pending = FALSE;
+
+ %(DEFAULT_BODY)s
+
+
+#.END
+
+
+#.FN_BODY Associate-result
+ /* extension present: last param set to true. asn2wrs didn't take notice of that */
+ offset = dissect_per_constrained_integer(tvb, offset, actx, tree, hf_index,
+ 0U, 2U, NULL, TRUE);
+#.END
+
+#.FN_BODY Release-request-reason
+ /* extension present: last param set to true. asn2wrs didn't take notice of that */
+ offset = dissect_per_constrained_integer(tvb, offset, actx, tree, hf_index,
+ 0U, 30U, NULL, TRUE);
+#.END
+
+#.FN_BODY Release-response-reason
+
+ /* extension present: last param set to true. asn2wrs didn't take notice of that */
+ offset = dissect_per_constrained_integer(
+ tvb,
+ offset,
+ actx,
+ tree,
+ hf_index,
+ 0U,
+ 30U,
+ NULL,
+ TRUE);
+
+#.END
+
+#.FN_BODY Mechanism-name
+
+ offset = dissect_per_object_identifier(
+ tvb,
+ offset,
+ actx,
+ tree,
+ hf_index,
+ NULL);
+
+#.END
+
+#.FN_BODY EXTERNALt/data-value-descriptor
+
+ offset = dissect_per_octet_string(
+ tvb,
+ offset,
+ actx,
+ tree,
+ hf_index,
+ -1,
+ -1,
+ FALSE,
+ &actx->external.data_value_descriptor);
+ actx->external.data_value_descr_present = TRUE;
+
+#.END
+
+#.FN_BODY EXTERNALt/encoding/single-ASN1-type
+
+ %(DEFAULT_BODY)s
+
+#.END
+
+#.FN_BODY EXTERNALt/encoding/octet-aligned
+
+ %(DEFAULT_BODY)s
+
+#.END
+
+#.FN_BODY EXTERNALt/encoding/arbitrary
+ tvbuff_t *tvb_usr = NULL;
+ packet_info * pinfo = actx->pinfo;
+ atn_conversation_t *atn_cv = NULL;
+ heur_dtbl_entry_t *hdtbl_entry;
+
+ /* decode bit-string user data within ACSE */
+ offset = dissect_per_bit_string(
+ tvb,
+ offset,
+ actx,
+ tree, hf_index,
+ NO_BOUND,
+ NO_BOUND,
+ FALSE,
+ &tvb_usr,
+ NULL);
+
+ if (tvb_usr) {
+ /* DT: dstref present, srcref is always zero */
+ if((pinfo->clnp_dstref) && (!pinfo->clnp_srcref)){
+
+ atn_cv = find_atn_conversation(
+ &pinfo->dst,
+ pinfo->clnp_dstref,
+ &pinfo->src);
+ }
+ /* CR: srcref present, dstref always zero */
+ if((pinfo->clnp_srcref) && (!pinfo->clnp_dstref)){
+
+ atn_cv = find_atn_conversation(
+ &pinfo->src,
+ pinfo->clnp_srcref,
+ &pinfo->dst);
+ }
+ /* CC: srcref and dstref present */
+ if((pinfo->clnp_srcref) && (pinfo->clnp_dstref)){
+
+ atn_cv = find_atn_conversation(
+ &pinfo->src,
+ pinfo->clnp_srcref,
+ &pinfo->dst);
+ }
+
+ if(atn_cv) {
+ switch(atn_cv->ae_qualifier){
+ case cma: /* contact management */
+
+ call_dissector_with_data(
+ atn_cm_handle,
+ tvb_new_subset_remaining(tvb_usr, 0),
+ pinfo,
+ root_tree,
+ NULL);
+ break;
+ case cpdlc: /* plain old cpdlc */
+ case pmcpdlc: /* protected mode cpdlc */
+
+ call_dissector_with_data(
+ atn_cpdlc_handle,
+ tvb_new_subset_remaining(tvb_usr, 0),
+ pinfo,
+ root_tree,
+ NULL);
+ break;
+ default: /* unknown or unhandled datalink application */
+
+ dissector_try_heuristic(
+ atn_ulcs_heur_subdissector_list,
+ tvb_new_subset_remaining(tvb_usr,0),
+ actx->pinfo,
+ root_tree,
+ &hdtbl_entry,
+ NULL);
+ break;
+ }
+ }else {
+
+ dissector_try_heuristic(
+ atn_ulcs_heur_subdissector_list,
+ tvb_new_subset_remaining(tvb_usr,0),
+ actx->pinfo,
+ root_tree,
+ &hdtbl_entry,
+ NULL);
+ }
+ }
+
+ offset += tvb_reported_length_remaining(tvb, offset);
+
+#.END
+
+#
+# Editor modelines - http://www.wireshark.org/tools/modelines.html
+#
+# Local variables:
+# c-basic-offset: 4
+# tab-width: 8
+# indent-tabs-mode: nil
+# End:
+#
+# vi: set shiftwidth=4 tabstop=8 expandtab:
+# :indentSize=4:tabSize=8:noTabs=true:
+#
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