# mms.cnf
# mms conformation file

#.MODULE_IMPORT
ISO-8650-ACSE-1 acse

#.IMPORT ../acse/acse-exp.cnf

#.EXPORTS
MMSpdu

#.PDU

#.NO_EMIT

#.TYPE_RENAME

#.TYPE_ATTR
TimeOfDay	TYPE = FT_STRING DISPLAY = BASE_NONE
UtcTime	TYPE = FT_STRING DISPLAY = BASE_NONE

#.FIELD_RENAME

#.FN_BODY ApplicationReference/ap-title
  offset=dissect_acse_AP_title(FALSE, tvb, offset, actx, tree, hf_mms_ap_title);

#.FN_BODY ApplicationReference/ap-invocation-id
  offset=dissect_acse_AP_invocation_identifier(FALSE, tvb, offset, actx, tree, hf_mms_ap_invocation_id);

#.FN_BODY ApplicationReference/ae-qualifier
  offset=dissect_acse_AE_qualifier(FALSE, tvb, offset, actx, tree, hf_mms_ae_qualifier);

#.FN_BODY ApplicationReference/ae-invocation-id
  offset=dissect_acse_AE_invocation_identifier(FALSE, tvb, offset, actx, tree, hf_mms_ae_invocation_id);

#.FN_BODY MMSpdu VAL_PTR=&branch_taken
  gint branch_taken;

%(DEFAULT_BODY)s

  if( (branch_taken!=-1) && mms_MMSpdu_vals[branch_taken].strptr ){
    col_append_fstr(actx->pinfo->cinfo, COL_INFO, "%%s ", mms_MMSpdu_vals[branch_taken].strptr);
  }



#.FN_BODY TimeOfDay

	guint32 len;
	guint32 milliseconds;
	guint16 days;
	gchar *	ptime;
	nstime_t ts;

	len = tvb_reported_length_remaining(tvb, offset);

	if(len == 4)
	{
		milliseconds = tvb_get_ntohl(tvb, offset);
		ptime = time_msecs_to_str(wmem_packet_scope(), milliseconds);

		if(hf_index >= 0)
		{
			proto_tree_add_string(tree, hf_index, tvb, offset, len, ptime);
		}
		return offset;
	}

	if(len == 6)
	{
		milliseconds = tvb_get_ntohl(tvb, offset);
		days = tvb_get_ntohs(tvb, offset+4);

		/* 5113 days between 01-01-1970 and 01-01-1984 */
		/* 86400 seconds in one day */

		ts.secs = (days + 5113) * 86400 + milliseconds / 1000;
		ts.nsecs = (milliseconds %% 1000) * 1000000U;

		ptime = abs_time_to_str(wmem_packet_scope(), &ts, ABSOLUTE_TIME_UTC, TRUE);
		if(hf_index >= 0)
		{
			proto_tree_add_string(tree, hf_index, tvb, offset, len, ptime);
		}

		return offset;
	}

	proto_tree_add_expert_format(tree, actx->pinfo, &ei_mms_mal_timeofday_encoding,
			tvb, offset, len, "BER Error: malformed TimeOfDay encoding, length must be 4 or 6 bytes");
	if(hf_index >= 0)
	{
		proto_tree_add_string(tree, hf_index, tvb, offset, len, "????");
	}
	return offset;


#.FN_BODY UtcTime

	guint32 len;
	guint32 seconds;
	guint32	fraction;
	guint32 nanoseconds;
	nstime_t ts;
	gchar *	ptime;

	len = tvb_reported_length_remaining(tvb, offset);

	if(len != 8)
	{
		proto_tree_add_expert_format(tree, actx->pinfo, &ei_mms_mal_utctime_encoding,
				tvb, offset, len, "BER Error: malformed IEC61850 UTCTime encoding, length must be 8 bytes");
		if(hf_index >= 0)
		{
			proto_tree_add_string(tree, hf_index, tvb, offset, len, "????");
		}
		return offset;
	}

	seconds = tvb_get_ntohl(tvb, offset);
	fraction = tvb_get_ntoh24(tvb, offset+4) * 0x100; /* Only 3 bytes are recommended */
	nanoseconds = (guint32)( ((guint64)fraction * G_GUINT64_CONSTANT(1000000000)) / G_GUINT64_CONSTANT(0x100000000) ) ;

	ts.secs = seconds;
	ts.nsecs = nanoseconds;

	ptime = abs_time_to_str(wmem_packet_scope(), &ts, ABSOLUTE_TIME_UTC, TRUE);

	if(hf_index >= 0)
	{
		proto_tree_add_string(tree, hf_index, tvb, offset, len, ptime);
	}

	return offset;