/* Wimax Mac RES-CMD Message Dissector */
static void dissect_mac_mgmt_msg_res_cmd_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
guint offset = 0;
guint tvb_len;
gint tlv_type, tlv_len, tlv_value_offset;
proto_item *res_cmd_item;
proto_tree *res_cmd_tree;
proto_tree *tlv_tree = NULL;
tlv_info_t tlv_info;
{ /* we are being asked for details */
/* Get the tvb reported length */
tvb_len = tvb_reported_length(tvb);
/* display MAC payload type RES-CMD */
res_cmd_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_res_cmd_decoder, tvb, offset, -1, "Reset Command (RES-CMD)");
/* add MAC RES-CMD subtree */
res_cmd_tree = proto_item_add_subtree(res_cmd_item, ett_mac_mgmt_msg_res_cmd_decoder);
/* Decode and display the Reset Command (RES-CMD) */
/* process the RES-CMD TLVs */
while(offset < tvb_len)
{
/* get the TLV information */
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, "RES-CMD TLV error");
proto_tree_add_item(res_cmd_tree, hf_res_cmd_invalid_tlv, tvb, offset, (tvb_len - offset), ENC_NA);
break;
}
/* get the TLV value offset */
tlv_value_offset = get_tlv_value_offset(&tlv_info);
#ifdef DEBUG /* for debug only */
proto_tree_add_protocol_format(res_cmd_tree, proto_mac_mgmt_msg_res_cmd_decoder, tvb, offset, (tlv_len + tlv_value_offset), "RES-CMD Type: %u (%u bytes, offset=%u, tlv_len=%u, tvb_len=%u)", tlv_type, (tlv_len + tlv_value_offset), offset, tlv_len, tvb_len);
#endif
/* process RES-CMD TLV Encoded information */
switch (tlv_type)
{
case HMAC_TUPLE: /* Table 348d */
/* decode and display the HMAC Tuple */
tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_res_cmd_decoder, res_cmd_tree, proto_mac_mgmt_msg_res_cmd_decoder, tvb, offset, tlv_len, "HMAC Tuple");
wimax_hmac_tuple_decoder(tlv_tree, tvb, offset+tlv_value_offset, tlv_len);
break;
case CMAC_TUPLE: /* Table 348b */
/* decode and display the CMAC Tuple */
tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_res_cmd_decoder, res_cmd_tree, proto_mac_mgmt_msg_res_cmd_decoder, tvb, offset, tlv_len, "CMAC Tuple");
wimax_cmac_tuple_decoder(tlv_tree, tvb, offset+tlv_value_offset, tlv_len);
break;
default:
/* display the unknown tlv in hex */
add_tlv_subtree(&tlv_info, res_cmd_tree, hf_res_cmd_unknown_type, tvb, offset, ENC_NA);
break;
}
offset += (tlv_len+tlv_value_offset);
} /* end of TLV process while loop */
}
}
void dissect_mac_mgmt_msg_dsd_req_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
guint offset = 0;
guint tvb_len, payload_type, tlv_len, tlv_value_offset;
gint tlv_type;
proto_item *dsd_item = NULL;
proto_tree *dsd_tree = NULL;
proto_tree *tlv_tree = NULL;
tlv_info_t tlv_info;
if(tree)
{ /* we are being asked for details */
/* get the message type */
payload_type = tvb_get_guint8(tvb, offset);
/* ensure the message type is DSD REQ/RSP/ACK */
if(payload_type != MAC_MGMT_MSG_DSD_REQ)
return;
/* Get the tvb reported length */
tvb_len = tvb_reported_length(tvb);
/* display MAC message type */
dsd_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dsd_decoder, tvb, offset, tvb_len,
"%s (%u bytes)", val_to_str(payload_type, vals_dsd_msgs, "Unknown"), tvb_len);
/* add MAC DSx subtree */
dsd_tree = proto_item_add_subtree(dsd_item, ett_mac_mgmt_msg_dsd_req_decoder);
/* Decode and display the DSD message */
/* display the Message Type */
proto_tree_add_item(dsd_tree, hf_dsd_req_message_type, tvb, offset, 1, ENC_BIG_ENDIAN);
/* move to next field */
offset++;
/* display the Transaction ID */
proto_tree_add_item(dsd_tree, hf_dsd_transaction_id, tvb, offset, 2, ENC_BIG_ENDIAN);
/* move to next field */
offset += 2;
/* display the Service Flow ID */
proto_tree_add_item(dsd_tree, hf_dsd_service_flow_id, tvb, offset, 4, ENC_BIG_ENDIAN);
/* move to next field */
offset += 4;
/* process DSD REQ message TLV Encode Information */
while(offset < tvb_len)
{ /* get the TLV information */
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, "DSD-REQ TLV error");
proto_tree_add_item(dsd_tree, hf_dsd_invalid_tlv, tvb, offset, (tvb_len - offset), FALSE);
break;
}
/* get the TLV value offset */
tlv_value_offset = get_tlv_value_offset(&tlv_info);
#ifdef DEBUG /* for debug only */
proto_tree_add_protocol_format(dsd_tree, proto_mac_mgmt_msg_dsd_decoder, tvb, offset, tlv_len + tlv_value_offset, "DSD-REQ TLV Type: %u (%u bytes, offset=%u, tvb_len=%u)", tlv_type, tlv_len + tlv_value_offset, offset, tvb_len);
#endif
/* update the offset */
offset += tlv_value_offset;
/* process TLV */
switch (tlv_type)
{
case HMAC_TUPLE: /* Table 348d */
/* decode and display the HMAC Tuple */
tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_dsd_req_decoder, dsd_tree, proto_mac_mgmt_msg_dsd_decoder, tvb, offset, tlv_len, "HMAC Tuple (%u byte(s))", tlv_len);
wimax_hmac_tuple_decoder(tlv_tree, tvb, offset, tlv_len);
break;
case CMAC_TUPLE: /* Table 348b */
/* decode and display the CMAC Tuple */
tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_dsd_req_decoder, dsd_tree, proto_mac_mgmt_msg_dsd_decoder, tvb, offset, tlv_len, "CMAC Tuple (%u byte(s))", tlv_len);
wimax_cmac_tuple_decoder(tlv_tree, tvb, offset, tlv_len);
break;
default:
/* display the unknown tlv in hex */
tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_dsd_req_decoder, dsd_tree, proto_mac_mgmt_msg_dsd_decoder, tvb, offset, tlv_len, "Unknown TLV (%u byte(s))", tlv_len);
proto_tree_add_item(tlv_tree, hf_dsd_unknown_type, tvb, (offset - tlv_value_offset), (tlv_len + tlv_value_offset), FALSE);
break;
}
offset += tlv_len;
} /* end of while loop */
}
}
/* 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 DREG-CMD messages. */
void dissect_mac_mgmt_msg_dreg_cmd_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
guint offset = 0;
guint tlv_offset;
guint tvb_len, payload_type;
proto_item *dreg_cmd_item = NULL;
proto_tree *dreg_cmd_tree = NULL;
proto_tree *tlv_tree = NULL;
tlv_info_t tlv_info;
gint tlv_type;
gint tlv_len;
gboolean hmac_found = FALSE;
/* Ensure the right payload type */
payload_type = tvb_get_guint8(tvb, 0);
if(payload_type != MAC_MGMT_MSG_DREG_CMD)
{
return;
}
if (tree)
{ /* we are being asked for details */
/* Get the tvb reported length */
tvb_len = tvb_reported_length(tvb);
/* display MAC payload type DREG-CMD */
dreg_cmd_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dreg_cmd_decoder, tvb, 0, tvb_len, "MAC Management Message, DREG-CMD (29)");
/* add MAC DREG CMD subtree */
dreg_cmd_tree = proto_item_add_subtree(dreg_cmd_item, ett_mac_mgmt_msg_dreg_decoder);
/* display the Message Type */
proto_tree_add_item(dreg_cmd_tree, hf_dreg_cmd_message_type, tvb, offset, 1, FALSE);
offset ++;
/* display the Action Code */
if (include_cor2_changes)
proto_tree_add_item(dreg_cmd_tree, hf_dreg_cmd_action_cor2, tvb, offset, 1, FALSE);
else
proto_tree_add_item(dreg_cmd_tree, hf_dreg_cmd_action, tvb, offset, 1, FALSE);
/* show the Reserved bits */
proto_tree_add_item(dreg_cmd_tree, hf_dreg_cmd_reserved, tvb, offset, 1, FALSE);
offset ++;
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 */
if (check_col(pinfo->cinfo, COL_INFO))
{
col_append_sep_str(pinfo->cinfo, COL_INFO, NULL, "DREG-CMD TLV error");
}
proto_tree_add_item(dreg_cmd_tree, hf_dreg_invalid_tlv, tvb, offset, (tvb_len - offset), FALSE);
break;
}
/* get the offset to the TLV data */
tlv_offset = offset + get_tlv_value_offset(&tlv_info);
switch (tlv_type) {
case HMAC_TUPLE: /* Table 348d */
/* decode and display the HMAC Tuple */
tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_dreg_decoder, dreg_cmd_tree, proto_mac_mgmt_msg_dreg_cmd_decoder, tvb, tlv_offset, tlv_len, "HMAC Tuple (%u byte(s))", tlv_len);
wimax_hmac_tuple_decoder(tlv_tree, tvb, tlv_offset, 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_dreg_decoder, dreg_cmd_tree, proto_mac_mgmt_msg_dreg_cmd_decoder, tvb, tlv_offset, tlv_len, "CMAC Tuple (%u byte(s))", tlv_len);
wimax_cmac_tuple_decoder(tlv_tree, tvb, tlv_offset, tlv_len);
break;
default:
/* Decode DREG-CMD sub-TLV's */
tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_dreg_decoder, dreg_cmd_tree, proto_mac_mgmt_msg_dreg_cmd_decoder, tvb, tlv_offset, tlv_len, "DREG-CMD sub-TLV's (%u byte(s))", tlv_len);
dissect_dreg_tlv(tlv_tree, tlv_type, tvb, tlv_offset, tlv_len);
break;
}
offset = tlv_len + tlv_offset;
} /* end of TLV process while loop */
if (!hmac_found)
proto_item_append_text(dreg_cmd_tree, " (HMAC Tuple is missing !)");
}
}
/* Decode DREG-REQ messages. */
static void dissect_mac_mgmt_msg_dreg_req_decoder(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
guint offset = 0;
guint tlv_offset;
guint tvb_len;
proto_item *dreg_req_item;
proto_tree *dreg_req_tree;
proto_tree *tlv_tree = NULL;
tlv_info_t tlv_info;
gint tlv_type;
gint tlv_len;
gboolean hmac_found = FALSE;
{ /* we are being asked for details */
/* Get the tvb reported length */
tvb_len = tvb_reported_length(tvb);
/* display MAC payload type DREG-REQ */
dreg_req_item = proto_tree_add_protocol_format(tree, proto_mac_mgmt_msg_dreg_req_decoder, tvb, 0, -1, "MAC Management Message, DREG-REQ");
/* add MAC DREG REQ subtree */
dreg_req_tree = proto_item_add_subtree(dreg_req_item, ett_mac_mgmt_msg_dreg_decoder);
/* display the Action Code */
proto_tree_add_item(dreg_req_tree, hf_dreg_req_action, tvb, offset, 1, ENC_BIG_ENDIAN);
/* show the Reserved bits */
proto_tree_add_item(dreg_req_tree, hf_dreg_req_reserved, tvb, offset, 1, ENC_BIG_ENDIAN);
offset++;
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, "DREG-REQ TLV error");
proto_tree_add_item(dreg_req_tree, hf_dreg_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 HMAC_TUPLE: /* Table 348d */
/* decode and display the HMAC Tuple */
tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_dreg_decoder, dreg_req_tree, proto_mac_mgmt_msg_dreg_req_decoder, tvb, tlv_offset, tlv_len, "HMAC Tuple (%u byte(s))", tlv_len);
wimax_hmac_tuple_decoder(tlv_tree, tvb, tlv_offset, 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_dreg_decoder, dreg_req_tree, proto_mac_mgmt_msg_dreg_req_decoder, tvb, tlv_offset, tlv_len, "CMAC Tuple (%u byte(s))", tlv_len);
wimax_cmac_tuple_decoder(tlv_tree, tvb, tlv_offset, tlv_len);
break;
default:
/* Decode DREG-REQ sub-TLV's */
tlv_tree = add_protocol_subtree(&tlv_info, ett_mac_mgmt_msg_dreg_decoder, dreg_req_tree, proto_mac_mgmt_msg_dreg_req_decoder, tvb, tlv_offset, tlv_len, "DREG-REQ sub-TLV's (%u byte(s))", tlv_len);
dissect_dreg_tlv(tlv_tree, tlv_type, tvb, tlv_offset, tlv_len);
break;
}
offset = tlv_len + tlv_offset;
} /* end of TLV process while loop */
if (!hmac_found)
proto_item_append_text(dreg_req_tree, " (HMAC Tuple is missing !)");
}
}
