Exemple #1
0
void dissect_mac_mgmt_msg_dsa_req_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
	guint offset = 0;
	guint tvb_len, payload_type;
	proto_item *dsa_item = NULL;
	proto_tree *dsa_tree = NULL;

	if(tree)
	{	/* we are being asked for details */
		/* get the message type */
		payload_type = tvb_get_guint8(tvb, offset);
		/* ensure the message type is DSA REQ */
		if(payload_type != MAC_MGMT_MSG_DSA_REQ)
			return;
		/* Get the tvb reported length */
		tvb_len =  tvb_reported_length(tvb);
		/* display MAC message type */
		dsa_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsa_decoder, tvb, offset, tvb_len, 
							  "%s (%u bytes)", val_to_str(payload_type, vals_dsa_msgs, "Unknown"), tvb_len);
		/* add MAC DSx subtree */
		dsa_tree = proto_item_add_subtree(dsa_item, ett_mac_mgmt_msg_dsa_req_decoder);
		/* Decode and display the Uplink Channel Descriptor (UCD) */
		/* display the Message Type */
		proto_tree_add_item(dsa_tree, hf_dsa_req_message_type, tvb, offset, 1, ENC_BIG_ENDIAN);
		/* move to next field */
		offset++;
		/* display the Transaction ID */
		proto_tree_add_item(dsa_tree, hf_dsa_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN);
		/* move to next field */
		offset += 2;
		/* process DSA-REQ message TLV Encode Information */
		wimax_common_tlv_encoding_decoder(tvb_new_subset(tvb, offset, (tvb_len - offset), (tvb_len - offset)), pinfo, dsa_tree);
	}
}
Exemple #2
0
static void dissect_mac_mgmt_msg_dsc_rsp_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
	guint offset = 0;
	proto_item *dsc_item;
	proto_tree *dsc_tree;

	{	/* we are being asked for details */
		/* display MAC message type */
		dsc_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsc_decoder, tvb, offset, -1,
							"Dynamic Service Change Response (DSC-RSP)");
		/* add MAC DSx subtree */
		dsc_tree = proto_item_add_subtree(dsc_item, ett_mac_mgmt_msg_dsc_rsp_decoder);
		/* Decode and display the Uplink Channel Descriptor (UCD) */
		/* display the Transaction ID */
		proto_tree_add_item(dsc_tree, hf_dsc_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN);
		/* move to next field */
		offset += 2;
		/* display the Confirmation Code */
		proto_tree_add_item(dsc_tree, hf_dsc_confirmation_code, tvb, offset, 1, ENC_BIG_ENDIAN);
		/* move to next field */
		offset++;
		/* process DSC RSP message TLV Encode Information */
		wimax_common_tlv_encoding_decoder(tvb_new_subset_remaining(tvb, offset), pinfo, dsc_tree);
	}
}
Exemple #3
0
void dissect_mac_mgmt_msg_dsc_ack_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
	guint offset = 0;
	guint tvb_len, payload_type;
	guint dsc_transaction_id;
	proto_item *dsc_item = NULL;
	proto_tree *dsc_tree = NULL;

	if(tree)
	{	/* we are being asked for details */
		/* get the message type */
		payload_type = tvb_get_guint8(tvb, offset);
		/* ensure the message type is DSC REQ/RSP/ACK */
		if((payload_type < MAC_MGMT_MSG_DSC_REQ) || (payload_type > MAC_MGMT_MSG_DSC_ACK))
			return;
		/* Get the tvb reported length */
		tvb_len =  tvb_reported_length(tvb);
		/* display MAC message type */
		dsc_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsc_decoder, tvb, offset, tvb_len,
							  "%s (%u bytes)", val_to_str(payload_type, vals_dsc_msgs, "Unknown"), tvb_len);
		/* add MAC DSx subtree */
		dsc_tree = proto_item_add_subtree(dsc_item, ett_mac_mgmt_msg_dsc_ack_decoder);
		/* Decode and display the Uplink Channel Descriptor (UCD) */
		/* display the Message Type */
		proto_tree_add_item(dsc_tree, hf_dsc_ack_message_type, tvb, offset, 1, FALSE);
		/* move to next field */
		offset++;
		/* get the Configuration Change Count */
		dsc_transaction_id = tvb_get_ntohs(tvb, offset);
		/* display the Transaction ID */
		proto_tree_add_item(dsc_tree, hf_dsc_transaction_id, tvb, offset, 2, FALSE);
		/* move to next field */
		offset += 2;
		/* display the Confirmation Code */
		proto_tree_add_item(dsc_tree, hf_dsc_confirmation_code, tvb, offset, 1, FALSE);
		/* move to next field */
		offset++;
		/* process DSC ACK message TLV Encode Information */
		wimax_common_tlv_encoding_decoder(tvb_new_subset(tvb, offset, (tvb_len - offset), (tvb_len - offset)), pinfo, dsc_tree);
	}
}
/* Decode REG-RSP messages. */
static void dissect_mac_mgmt_msg_reg_rsp_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
	guint offset = 0;
	guint tlv_offset;
	guint tvb_len;
	proto_item *reg_rsp_item;
	proto_tree *reg_rsp_tree;
	proto_item *tlv_item = NULL;
	proto_tree *tlv_tree = NULL;
	proto_tree *sub_tree = NULL;
	gboolean hmac_found = FALSE;
	tlv_info_t tlv_info;
	gint tlv_type;
	guint tlv_len;
	guint this_offset = 0;
	tlv_info_t sub_tlv_info;
	gint sub_tlv_type;
	gint sub_tlv_len;
	guint sub_tlv_offset;

	{	/* we are being asked for details */

		/* Get the tvb reported length */
		tvb_len =  tvb_reported_length(tvb);
		/* display MAC payload type REG-RSP */
		reg_rsp_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_reg_rsp_decoder, tvb, offset, tvb_len, "MAC Management Message, REG-RSP");
		/* add MAC REG-RSP subtree */
		reg_rsp_tree = proto_item_add_subtree(reg_rsp_item, ett_mac_mgmt_msg_reg_rsp_decoder);
		proto_tree_add_item(reg_rsp_tree, hf_reg_rsp_status, tvb, offset, 1, ENC_BIG_ENDIAN);
		offset += 1;

		while (offset < tvb_len)
		{
			/* Get the TLV data. */
			init_tlv_info(&tlv_info, tvb, offset);
			/* get the TLV type */
			tlv_type = get_tlv_type(&tlv_info);
			/* get the TLV length */
			tlv_len = get_tlv_length(&tlv_info);
			if (tlv_type == -1 || tlv_len > MAX_TLV_LEN || tlv_len < 1)
			{	/* invalid tlv info */
				col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "REG-RSP TLV error");
				proto_tree_add_item(reg_rsp_tree, hf_reg_invalid_tlv, tvb, offset, (tvb_len - offset), ENC_NA);
				break;
			}
			/* get the offset to the TLV data */
			tlv_offset = offset + get_tlv_value_offset(&tlv_info);

			switch (tlv_type) {
				case REG_ARQ_PARAMETERS:
				case REG_SS_MGMT_SUPPORT:
				case REG_IP_MGMT_MODE:
				case REG_IP_VERSION:
				case REG_UL_TRANSPORT_CIDS_SUPPORTED:
				case REG_IP_PHS_SDU_ENCAP:
				case REG_MAX_CLASSIFIERS_SUPPORTED:
				case REG_PHS_SUPPORT:
				case REG_ARQ_SUPPORT:
				case REG_DSX_FLOW_CONTROL:
				case REG_MCA_FLOW_CONTROL:
				case REG_MCAST_POLLING_CIDS:
				case REG_NUM_DL_TRANS_CID:
				case REG_MAC_ADDRESS:
#ifdef WIMAX_16E_2005
				case REG_TLV_T_20_MAX_MAC_DATA_PER_FRAME_SUPPORT:
				case REG_TLV_T_21_PACKING_SUPPORT:
				case REG_TLV_T_22_MAC_EXTENDED_RTPS_SUPPORT:
				case REG_TLV_T_23_MAX_NUM_BURSTS_TRANSMITTED_CONCURRENTLY_TO_THE_MS:
				case REG_TLV_T_26_METHOD_FOR_ALLOCATING_IP_ADDR_SECONDARY_MGMNT_CONNECTION:
				case REG_TLV_T_27_HANDOVER_SUPPORTED:
				case REG_TLV_T_29_HO_PROCESS_OPTIMIZATION_MS_TIMER:
				case REG_TLV_T_31_MOBILITY_FEATURES_SUPPORTED:
				case REG_TLV_T_40_ARQ_ACK_TYPE:
				case REG_TLV_T_41_MS_HO_CONNECTIONS_PARAM_PROCESSING_TIME:
				case REG_TLV_T_42_MS_HO_TEK_PROCESSING_TIME:
				case REG_TLV_T_43_MAC_HEADER_AND_EXTENDED_SUBHEADER_SUPPORT:
				case REG_POWER_SAVING_CLASS_CAPABILITY:
#endif
					dissect_extended_tlv(reg_rsp_tree, tlv_type, tvb, tlv_offset, tlv_len, pinfo, offset, proto_mac_mgmt_msg_reg_rsp_decoder);
					break;
				case REG_RSP_SECONDARY_MGMT_CID:
					add_tlv_subtree(&tlv_info, reg_rsp_tree, hf_reg_rsp_secondary_mgmt_cid, tvb, offset, ENC_BIG_ENDIAN);
					break;

				case REG_RSP_TLV_T_36_TOTAL_PROVISIONED_SERVICE_FLOW_DSAs:
					add_tlv_subtree(&tlv_info, reg_rsp_tree, hf_reg_total_provisioned_sf, tvb, offset, ENC_BIG_ENDIAN);
					break;

				case REG_RSP_TLV_T_24_CID_UPDATE_ENCODINGS:
					/* Display CID update encodings */
					/* add subtree */
					sub_tree = add_protocol_subtree(&tlv_info, ett_reg_rsp_message_tree, reg_rsp_tree, proto_mac_mgmt_msg_reg_rsp_decoder, tvb, offset, tlv_len, "CID update encodings");
					/* Use a local copy of tlv_offset */
					this_offset = tlv_offset;
					while(this_offset < tlv_len) {
						/* Get the sub TLV data. */
						init_tlv_info(&sub_tlv_info, tvb, this_offset);
						/* get the sub TLV type */
						sub_tlv_type = get_tlv_type(&sub_tlv_info);
						/* get the TLV length */
						sub_tlv_len = get_tlv_length(&sub_tlv_info);
						if (tlv_type == -1 || sub_tlv_len > MAX_TLV_LEN || sub_tlv_len < 1)
						{	/* invalid tlv info */
							col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "REG-RSP TLV error");
							proto_tree_add_item(reg_rsp_tree, hf_reg_invalid_tlv, tvb, offset, (tvb_len - offset), ENC_NA);
							break;
						}
						/* get the offset to the sub TLV data */
						sub_tlv_offset = this_offset + get_tlv_value_offset(&sub_tlv_info);
						switch (sub_tlv_type) {
							case REG_RSP_TLV_T_24_1_CID_UPDATE_ENCODINGS_NEW_CID:
								add_tlv_subtree(&sub_tlv_info, sub_tree, hf_reg_rsp_new_cid_after_ho, tvb, this_offset, ENC_BIG_ENDIAN);
								break;
							case REG_RSP_TLV_T_24_2_CID_UPDATE_ENCODINGS_SFID:
								add_tlv_subtree(&sub_tlv_info, sub_tree, hf_reg_rsp_service_flow_id, tvb, this_offset, ENC_BIG_ENDIAN);
								break;
							case REG_RSP_TLV_T_24_3_CID_UPDATE_ENCODINGS_CONNECTION_INFO:
								tlv_tree = add_protocol_subtree(&sub_tlv_info, ett_reg_rsp_message_tree, sub_tree, proto_mac_mgmt_msg_reg_rsp_decoder, tvb, this_offset, sub_tlv_len, "CID Update Encodings Connection Info");
								/* Decode the DSC_RSP subTLV's */
								call_dissector(dsc_rsp_handle, tvb_new_subset_length(tvb, sub_tlv_offset, sub_tlv_len), pinfo, tlv_tree);
								break;
							default:
								add_tlv_subtree(&sub_tlv_info, sub_tree, hf_tlv_type, tvb, this_offset, ENC_NA);
								break;
						}
						this_offset = sub_tlv_len + sub_tlv_offset;
					}
					break;
				case REG_RSP_TLV_T_28_HO_SYSTEM_RESOURCE_RETAIN_TIME:
					tlv_item = add_tlv_subtree(&tlv_info, reg_rsp_tree, hf_reg_rsp_system_resource_retain_time, tvb, offset, ENC_BIG_ENDIAN);
					if (include_cor2_changes) {
						proto_item_append_text(tlv_item, " (in units of 100 milliseconds)");
					} else {
						proto_item_append_text(tlv_item, " (multiple of 100 milliseconds)");
					}
					break;
				case DSx_UPLINK_FLOW:
					/* display Uplink Service Flow Encodings info */
					/* add subtree */
					tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_reg_rsp_decoder, reg_rsp_tree, proto_mac_mgmt_msg_reg_rsp_decoder, tvb, offset, tlv_len, "Uplink Service Flow Encodings");
					/* decode and display the DL Service Flow Encodings */
					wimax_service_flow_encodings_decoder(tvb_new_subset_length(tvb, tlv_offset, tlv_len), pinfo, tlv_tree);
					break;
				case DSx_DOWNLINK_FLOW:
					/* display Downlink Service Flow Encodings info */
					/* add subtree */
					tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_reg_rsp_decoder, reg_rsp_tree, proto_mac_mgmt_msg_reg_rsp_decoder, tvb, offset, tlv_len, "Downlink Service Flow Encodings");
					/* decode and display the DL Service Flow Encodings */
					wimax_service_flow_encodings_decoder(tvb_new_subset_length(tvb, tlv_offset, tlv_len), pinfo, tlv_tree);
					break;
				case HMAC_TUPLE:	/* Table 348d */
					/* decode and display the HMAC Tuple */
					tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_reg_rsp_decoder, reg_rsp_tree, proto_mac_mgmt_msg_reg_rsp_decoder, tvb, offset, tlv_len, "HMAC Tuple");
					wimax_hmac_tuple_decoder(tlv_tree, tvb, offset+2, tlv_len);
					hmac_found = TRUE;
					break;
				case CMAC_TUPLE:	/* Table 348b */
					/* decode and display the CMAC Tuple */
					tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_reg_rsp_decoder, reg_rsp_tree, proto_mac_mgmt_msg_reg_rsp_decoder, tvb, offset, tlv_len, "CMAC Tuple");
					wimax_cmac_tuple_decoder(tlv_tree, tvb, offset+2, tlv_len);
					break;
				case SHORT_HMAC_TUPLE:
				case SHORT_HMAC_TUPLE_COR2:
					if ((!include_cor2_changes && (tlv_type == SHORT_HMAC_TUPLE)) ||
						(include_cor2_changes && (tlv_type == SHORT_HMAC_TUPLE_COR2))) {
						/* decode and display the Short HMAC Tuple */
						tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_reg_rsp_decoder, reg_rsp_tree, proto_mac_mgmt_msg_reg_rsp_decoder, tvb, offset, tlv_len, "Short HMAC Tuple");
						wimax_short_hmac_tuple_decoder(tlv_tree, tvb, tlv_offset, tlv_len);
					} else {
						/* Unknown TLV Type */
						add_tlv_subtree(&tlv_info, reg_rsp_tree, hf_tlv_type, tvb, offset, ENC_NA);
					}
					break;
				case VENDOR_SPECIFIC_INFO:
				case VENDOR_ID_ENCODING:
				case MAC_VERSION_ENCODING:
					wimax_common_tlv_encoding_decoder(tvb_new_subset_length(tvb, offset, (tvb_len - offset)), pinfo, reg_rsp_tree);
					break;
				default:
					add_tlv_subtree(&tlv_info, reg_rsp_tree, hf_tlv_type, tvb, offset, ENC_NA);
					break;
			}

			offset = tlv_len + tlv_offset;
		}	/* end of TLV process while loop */
		if (!hmac_found)
			proto_item_append_text(reg_rsp_tree, " (HMAC Tuple is missing !)");
	}
}
/* Decode RNG-REQ messages. */
static void dissect_mac_mgmt_msg_rng_req_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
	guint offset = 0;
	guint tlv_offset;
	guint tvb_len;
	proto_item *rng_req_item, *tlv_item;
	proto_tree *rng_req_tree, *tlv_tree;
	tlv_info_t tlv_info;
	gint tlv_type;
	gint tlv_len;

	{	/* we are being asked for details */

		/* Get the tvb reported length */
		tvb_len =  tvb_reported_length(tvb);
		/* display MAC payload type RNG-REQ */
		rng_req_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_rng_req_decoder, tvb, offset, tvb_len, "MAC Management Message, RNG-REQ");
		/* add MAC RNG-REQ subtree */
		rng_req_tree = proto_item_add_subtree(rng_req_item, ett_mac_mgmt_msg_rng_req_decoder);
		/* display the Message Type */
		proto_tree_add_item(rng_req_tree, hf_rng_req_reserved, tvb, 0, 1, ENC_BIG_ENDIAN);
		offset += 1;

		while(offset < tvb_len)
		{
			/* Get the TLV data. */
			init_tlv_info(&tlv_info, tvb, offset);
			/* get the TLV type */
			tlv_type = get_tlv_type(&tlv_info);
			/* get the TLV length */
			tlv_len = get_tlv_length(&tlv_info);
			if(tlv_type == -1 || tlv_len > MAX_TLV_LEN || tlv_len < 1)
			{	/* invalid tlv info */
				col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "RNG-REQ TLV error");
				proto_tree_add_item(rng_req_tree, hf_rng_invalid_tlv, tvb, offset, (tvb_len - offset), ENC_NA);
				break;
			}
			/* get the offset to the TLV data */
			tlv_offset = offset + get_tlv_value_offset(&tlv_info);

			switch (tlv_type) {
				case RNG_REQ_DL_BURST_PROFILE:
					/* add TLV subtree */
					tlv_item = add_tlv_subtree(&tlv_info, rng_req_tree, hf_rng_req_dl_burst_profile, tvb, offset, ENC_BIG_ENDIAN);
					tlv_tree = proto_item_add_subtree(tlv_item, ett_mac_mgmt_msg_rng_req_decoder);
					proto_tree_add_item(tlv_tree, hf_rng_req_dl_burst_profile_diuc, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
					proto_tree_add_item(tlv_tree, hf_rng_req_dl_burst_profile_lsb_ccc, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
					break;
				case RNG_REQ_SS_MAC_ADDRESS:
					add_tlv_subtree(&tlv_info, rng_req_tree, hf_rng_req_ss_mac_address, tvb, offset, ENC_NA);
					break;
				case RNG_REQ_RANGING_ANOMALIES:
					tlv_item = add_tlv_subtree(&tlv_info, rng_req_tree, hf_rng_req_ranging_anomalies, tvb, offset, ENC_BIG_ENDIAN);
					tlv_tree = proto_item_add_subtree(tlv_item, ett_mac_mgmt_msg_rng_req_decoder);
					proto_tree_add_item(tlv_tree, hf_rng_req_ranging_anomalies_max_power, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
					proto_tree_add_item(tlv_tree, hf_rng_req_ranging_anomalies_min_power, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
					proto_tree_add_item(tlv_tree, hf_rng_req_ranging_anomalies_timing_adj, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
					break;
				case RNG_REQ_AAS_BROADCAST:
					add_tlv_subtree(&tlv_info, rng_req_tree, hf_rng_req_aas_broadcast, tvb, offset, ENC_BIG_ENDIAN);
					break;
				case RNG_REQ_SERVING_BS_ID:
					add_tlv_subtree(&tlv_info, rng_req_tree, hf_rng_req_serving_bs_id, tvb, offset, ENC_NA);
					break;
				case RNG_REQ_RANGING_PURPOSE_INDICATION:
					/* display the Ranging Purpose Flags */
					tlv_item = add_tlv_subtree(&tlv_info, rng_req_tree, hf_rng_req_ranging_purpose_indication, tvb, offset, ENC_BIG_ENDIAN);
					tlv_tree = proto_item_add_subtree(tlv_item, ett_mac_mgmt_msg_rng_req_decoder);
					proto_tree_add_item(tlv_tree, hf_rng_req_ranging_purpose_ho_indication, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
					proto_tree_add_item(tlv_tree, hf_rng_req_ranging_purpose_location_update_request, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
					proto_tree_add_item(tlv_tree, hf_rng_req_ranging_purpose_reserved, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
					break;
				case RNG_REQ_HO_ID:
					add_tlv_subtree(&tlv_info, rng_req_tree, hf_rng_req_ho_id, tvb, offset, ENC_BIG_ENDIAN);
					break;
				case RNG_REQ_POWER_DOWN_INDICATOR:
					add_tlv_subtree(&tlv_info, rng_req_tree, hf_rng_req_power_down_indicator, tvb, offset, ENC_BIG_ENDIAN);
					break;
				case RNG_REQ_REQUESTED_DNLK_REP_CODING_LEVEL:
					tlv_item = add_tlv_subtree(&tlv_info, rng_req_tree, hf_rng_req_requested_rep_coding_level, tvb, offset, ENC_BIG_ENDIAN);
					tlv_tree = proto_item_add_subtree(tlv_item, ett_mac_mgmt_msg_rng_req_decoder);
					proto_tree_add_item(tlv_tree, hf_rng_req_repetition_coding_level, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
					proto_tree_add_item(tlv_tree, hf_rng_req_requested_downlink_repetition_coding_level_reserved, tvb, tlv_offset, 1, ENC_BIG_ENDIAN);
					break;
				case RNG_REQ_CMAC_KEY_COUNT:
					if (include_cor2_changes) {
						add_tlv_subtree(&tlv_info, rng_req_tree, hf_rng_req_cmac_key_count, tvb, offset, ENC_BIG_ENDIAN);
					} else {
						/* Unknown TLV type */
						add_tlv_subtree(&tlv_info, rng_req_tree, hf_tlv_type, tvb, offset, ENC_NA);
					}
					break;
				case SHORT_HMAC_TUPLE:
				case SHORT_HMAC_TUPLE_COR2:
					if ((!include_cor2_changes && (tlv_type == SHORT_HMAC_TUPLE)) ||
						(include_cor2_changes && (tlv_type == SHORT_HMAC_TUPLE_COR2))) {
						/* decode and display the Short HMAC Tuple */
						tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_rng_req_decoder, rng_req_tree, proto_mac_mgmt_msg_rng_req_decoder, tvb, offset, tlv_len, "Short HMAC Tuple");
						wimax_short_hmac_tuple_decoder(tlv_tree, tvb, tlv_offset, tvb_len - offset);
					} else {
						/* Unknown TLV Type */
						add_tlv_subtree(&tlv_info, rng_req_tree, hf_tlv_type, tvb, offset, ENC_NA);
					}
					break;
				case MAC_VERSION_ENCODING:
					offset += wimax_common_tlv_encoding_decoder(tvb_new_subset_remaining(tvb, offset), pinfo, rng_req_tree);
					continue;
					break;
				case RNG_REQ_POWER_SAVING_CLASS_PARAMETERS:
					tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_rng_req_decoder, rng_req_tree, proto_mac_mgmt_msg_rng_req_decoder, tvb, offset, tlv_len, "Power Saving Class Parameters");
					dissect_power_saving_class(tlv_tree, tlv_type, tvb, tlv_len, pinfo, tlv_offset);
					break;
				default:
					add_tlv_subtree(&tlv_info, rng_req_tree, hf_tlv_type, tvb, offset, ENC_NA);
					break;
			}
			/* update the offset */
			offset = tlv_len + tlv_offset;
		}	/* end of TLV process while loop */
	}
}