blob: 9cd217e994a1e2e35399357a3957a7a99c43a47f [file] [log] [blame]
/*
Copyright 2020 the original author or authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package openflow
import (
"context"
"encoding/json"
"github.com/opencord/goloxi"
ofp "github.com/opencord/goloxi/of13"
"github.com/opencord/voltha-lib-go/v3/pkg/log"
"github.com/opencord/voltha-protos/v3/go/common"
"github.com/opencord/voltha-protos/v3/go/openflow_13"
"net"
)
func (ofc *OFConnection) handleStatsRequest(request ofp.IHeader, statType uint16) error {
if logger.V(log.DebugLevel) {
js, _ := json.Marshal(request)
logger.Debugw("handleStatsRequest called",
log.Fields{
"device-id": ofc.DeviceID,
"stat-type": statType,
"request": js})
}
switch statType {
case ofp.OFPSTDesc:
statsReq := request.(*ofp.DescStatsRequest)
response, err := ofc.handleDescStatsRequest(statsReq)
if err != nil {
return err
}
if logger.V(log.DebugLevel) {
reqJs, _ := json.Marshal(statsReq)
resJs, _ := json.Marshal(response)
logger.Debugw("handle-stats-request-desc",
log.Fields{
"device-id": ofc.DeviceID,
"request": reqJs,
"response": resJs})
}
return ofc.SendMessage(response)
case ofp.OFPSTFlow:
statsReq := request.(*ofp.FlowStatsRequest)
responses, err := ofc.handleFlowStatsRequest(statsReq)
if err != nil {
return err
}
if logger.V(log.DebugLevel) {
reqJs, _ := json.Marshal(statsReq)
resJs, _ := json.Marshal(responses)
logger.Debugw("handle-stats-request-flow",
log.Fields{
"device-id": ofc.DeviceID,
"request": reqJs,
"responses-object": responses,
"response": resJs})
}
for _, response := range responses {
err := ofc.SendMessage(response)
if err != nil {
return err
}
}
return nil
case ofp.OFPSTAggregate:
statsReq := request.(*ofp.AggregateStatsRequest)
response, err := ofc.handleAggregateStatsRequest(statsReq)
if err != nil {
return err
}
if logger.V(log.DebugLevel) {
reqJs, _ := json.Marshal(statsReq)
resJs, _ := json.Marshal(response)
logger.Debugw("handle-stats-request-aggregate",
log.Fields{
"device-id": ofc.DeviceID,
"request": reqJs,
"response": resJs})
}
return ofc.SendMessage(response)
case ofp.OFPSTTable:
statsReq := request.(*ofp.TableStatsRequest)
response, e := ofc.handleTableStatsRequest(statsReq)
if logger.V(log.DebugLevel) {
reqJs, _ := json.Marshal(statsReq)
resJs, _ := json.Marshal(response)
logger.Debugw("handle-stats-request-table",
log.Fields{
"device-id": ofc.DeviceID,
"request": reqJs,
"response": resJs})
}
if e != nil {
return e
}
return ofc.SendMessage(response)
case ofp.OFPSTPort:
statsReq := request.(*ofp.PortStatsRequest)
responses, err := ofc.handlePortStatsRequest(statsReq)
if err != nil {
return err
}
if logger.V(log.DebugLevel) {
reqJs, _ := json.Marshal(statsReq)
resJs, _ := json.Marshal(responses)
logger.Debugw("handle-stats-request-port",
log.Fields{
"device-id": ofc.DeviceID,
"request": reqJs,
"response": resJs})
}
for _, response := range responses {
err := ofc.SendMessage(response)
if err != nil {
return err
}
}
return nil
case ofp.OFPSTQueue:
statsReq := request.(*ofp.QueueStatsRequest)
response, err := ofc.handleQueueStatsRequest(statsReq)
if err != nil {
return err
}
if logger.V(log.DebugLevel) {
reqJs, _ := json.Marshal(statsReq)
resJs, _ := json.Marshal(response)
logger.Debugw("handle-stats-request-queue",
log.Fields{
"device-id": ofc.DeviceID,
"request": reqJs,
"response": resJs})
}
return ofc.SendMessage(response)
case ofp.OFPSTGroup:
statsReq := request.(*ofp.GroupStatsRequest)
response, err := ofc.handleGroupStatsRequest(statsReq)
if err != nil {
return err
}
if logger.V(log.DebugLevel) {
reqJs, _ := json.Marshal(statsReq)
resJs, _ := json.Marshal(response)
logger.Debugw("handle-stats-request-group",
log.Fields{
"device-id": ofc.DeviceID,
"request": reqJs,
"response": resJs})
}
return ofc.SendMessage(response)
case ofp.OFPSTGroupDesc:
statsReq := request.(*ofp.GroupDescStatsRequest)
response, err := ofc.handleGroupStatsDescRequest(statsReq)
if err != nil {
return err
}
if logger.V(log.DebugLevel) {
reqJs, _ := json.Marshal(statsReq)
resJs, _ := json.Marshal(response)
logger.Debugw("handle-stats-request-group-desc",
log.Fields{
"device-id": ofc.DeviceID,
"request": reqJs,
"response": resJs})
}
return ofc.SendMessage(response)
case ofp.OFPSTGroupFeatures:
statsReq := request.(*ofp.GroupFeaturesStatsRequest)
response, err := ofc.handleGroupFeatureStatsRequest(statsReq)
if err != nil {
return err
}
if logger.V(log.DebugLevel) {
reqJs, _ := json.Marshal(statsReq)
resJs, _ := json.Marshal(response)
logger.Debugw("handle-stats-request-group-features",
log.Fields{
"device-id": ofc.DeviceID,
"request": reqJs,
"response": resJs})
}
return ofc.SendMessage(response)
case ofp.OFPSTMeter:
statsReq := request.(*ofp.MeterStatsRequest)
response, err := ofc.handleMeterStatsRequest(statsReq)
if err != nil {
return err
}
if logger.V(log.DebugLevel) {
reqJs, _ := json.Marshal(statsReq)
resJs, _ := json.Marshal(response)
logger.Debugw("handle-stats-request-meter",
log.Fields{
"device-id": ofc.DeviceID,
"request": reqJs,
"response": resJs})
}
return ofc.SendMessage(response)
case ofp.OFPSTMeterConfig:
statsReq := request.(*ofp.MeterConfigStatsRequest)
response, err := ofc.handleMeterConfigStatsRequest(statsReq)
if err != nil {
return err
}
if logger.V(log.DebugLevel) {
reqJs, _ := json.Marshal(statsReq)
resJs, _ := json.Marshal(response)
logger.Debugw("handle-stats-request-meter-config",
log.Fields{
"device-id": ofc.DeviceID,
"request": reqJs,
"response": resJs})
}
return ofc.SendMessage(response)
case ofp.OFPSTMeterFeatures:
statsReq := request.(*ofp.MeterFeaturesStatsRequest)
response, err := ofc.handleMeterFeatureStatsRequest(statsReq)
if err != nil {
return err
}
if logger.V(log.DebugLevel) {
reqJs, _ := json.Marshal(statsReq)
resJs, _ := json.Marshal(response)
logger.Debugw("handle-stats-request-meter-features",
log.Fields{
"device-id": ofc.DeviceID,
"request": reqJs,
"response": resJs})
}
return ofc.SendMessage(response)
case ofp.OFPSTTableFeatures:
statsReq := request.(*ofp.TableFeaturesStatsRequest)
response, err := ofc.handleTableFeaturesStatsRequest(statsReq)
if err != nil {
return err
}
if logger.V(log.DebugLevel) {
reqJs, _ := json.Marshal(statsReq)
resJs, _ := json.Marshal(response)
logger.Debugw("handle-stats-request-table-features",
log.Fields{
"device-id": ofc.DeviceID,
"request": reqJs,
"response": resJs})
}
return ofc.SendMessage(response)
case ofp.OFPSTPortDesc:
statsReq := request.(*ofp.PortDescStatsRequest)
responses, err := ofc.handlePortDescStatsRequest(statsReq)
if err != nil {
return err
}
if logger.V(log.DebugLevel) {
reqJs, _ := json.Marshal(statsReq)
resJs, _ := json.Marshal(responses)
logger.Debugw("handle-stats-request-port-desc",
log.Fields{
"device-id": ofc.DeviceID,
"request": reqJs,
"response": resJs})
}
for _, response := range responses {
err := ofc.SendMessage(response)
if err != nil {
return err
}
}
return nil
case ofp.OFPSTExperimenter:
statsReq := request.(*ofp.ExperimenterStatsRequest)
response, err := ofc.handleExperimenterStatsRequest(statsReq)
if err != nil {
return err
}
if logger.V(log.DebugLevel) {
reqJs, _ := json.Marshal(statsReq)
resJs, _ := json.Marshal(response)
logger.Debugw("handle-stats-request-experimenter",
log.Fields{
"device-id": ofc.DeviceID,
"request": reqJs,
"response": resJs})
}
return ofc.SendMessage(response)
}
return nil
}
func (ofc *OFConnection) handleDescStatsRequest(request *ofp.DescStatsRequest) (*ofp.DescStatsReply, error) {
volthaClient := ofc.VolthaClient.Get()
if volthaClient == nil {
return nil, NoVolthaConnectionError
}
response := ofp.NewDescStatsReply()
response.SetXid(request.GetXid())
response.SetVersion(request.GetVersion())
response.SetFlags(ofp.StatsReplyFlags(request.GetFlags()))
resp, err := volthaClient.GetLogicalDevice(context.Background(),
&common.ID{Id: ofc.DeviceID})
if err != nil {
return nil, err
}
desc := resp.GetDesc()
response.SetMfrDesc(PadString(desc.GetMfrDesc(), 256))
response.SetHwDesc(PadString(desc.GetHwDesc(), 256))
response.SetSwDesc(PadString(desc.GetSwDesc(), 256))
response.SetSerialNum(PadString(desc.GetSerialNum(), 32))
response.SetDpDesc(PadString(desc.GetDpDesc(), 256))
return response, nil
}
func (ofc *OFConnection) handleFlowStatsRequest(request *ofp.FlowStatsRequest) ([]*ofp.FlowStatsReply, error) {
volthaClient := ofc.VolthaClient.Get()
if volthaClient == nil {
return nil, NoVolthaConnectionError
}
resp, err := volthaClient.ListLogicalDeviceFlows(context.Background(),
&common.ID{Id: ofc.DeviceID})
if err != nil {
return nil, err
}
var flows []*ofp.FlowStatsEntry
for _, item := range resp.GetItems() {
entry := ofp.NewFlowStatsEntry()
entry.SetTableId(uint8(item.GetTableId()))
entry.SetDurationSec(item.GetDurationSec())
entry.SetDurationNsec(item.GetDurationNsec())
entry.SetPriority(uint16(item.GetPriority()))
entry.SetIdleTimeout(uint16(item.GetIdleTimeout()))
entry.SetHardTimeout(uint16(item.GetHardTimeout()))
entry.SetFlags(ofp.FlowModFlags(item.GetFlags()))
entry.SetCookie(item.GetCookie())
entry.SetPacketCount(item.GetPacketCount())
entry.SetByteCount(item.GetByteCount())
match := ofp.NewMatchV3()
pbMatch := item.GetMatch()
match.SetType(uint16(pbMatch.GetType()))
var fields []goloxi.IOxm
for _, oxmField := range pbMatch.GetOxmFields() {
field := oxmField.GetField()
ofbField := field.(*openflow_13.OfpOxmField_OfbField).OfbField
iOxm := parseOxm(ofbField)
fields = append(fields, iOxm)
}
match.OxmList = fields
entry.SetMatch(*match)
var instructions []ofp.IInstruction
for _, ofpInstruction := range item.Instructions {
instruction := parseInstructions(ofpInstruction)
instructions = append(instructions, instruction)
}
entry.Instructions = instructions
flows = append(flows, entry)
}
var responses []*ofp.FlowStatsReply
chunkSize := ofc.flowsChunkSize
total := len(flows) / chunkSize
n := 0
for n <= total {
chunk := flows[n*chunkSize : min((n*chunkSize)+chunkSize, len(flows))]
if len(chunk) == 0 {
break
}
response := ofp.NewFlowStatsReply()
response.SetXid(request.GetXid())
response.SetVersion(4)
response.SetFlags(ofp.StatsReplyFlags(request.GetFlags()))
if total != n {
response.SetFlags(ofp.StatsReplyFlags(ofp.OFPSFReplyMore))
}
response.SetEntries(chunk)
responses = append(responses, response)
n++
}
return responses, nil
}
func (ofc *OFConnection) handleAggregateStatsRequest(request *ofp.AggregateStatsRequest) (*ofp.AggregateStatsReply, error) {
response := ofp.NewAggregateStatsReply()
response.SetVersion(request.GetVersion())
response.SetXid(request.GetXid())
response.SetFlags(ofp.StatsReplyFlags(request.GetFlags()))
response.SetFlowCount(0)
//TODO wire this to voltha core when it implements
return response, nil
}
func (ofc *OFConnection) handleGroupStatsRequest(request *ofp.GroupStatsRequest) (*ofp.GroupStatsReply, error) {
volthaClient := ofc.VolthaClient.Get()
if volthaClient == nil {
return nil, NoVolthaConnectionError
}
response := ofp.NewGroupStatsReply()
response.SetVersion(request.GetVersion())
response.SetXid(request.GetXid())
response.SetFlags(ofp.StatsReplyFlags(request.GetFlags()))
reply, err := volthaClient.ListLogicalDeviceFlowGroups(context.Background(),
&common.ID{Id: ofc.DeviceID})
if err != nil {
return nil, err
}
var groupStatsEntries []*ofp.GroupStatsEntry
for _, item := range reply.GetItems() {
stats := item.GetStats()
var entry ofp.GroupStatsEntry
entry.SetByteCount(stats.GetByteCount())
entry.SetPacketCount(stats.GetPacketCount())
entry.SetDurationNsec(stats.GetDurationNsec())
entry.SetDurationSec(stats.GetDurationSec())
entry.SetRefCount(stats.GetRefCount())
entry.SetGroupId(stats.GetGroupId())
var bucketStatsList []*ofp.BucketCounter
// TODO fix this when API handler is fixed in the core
// Core doesn't return any buckets in the Stats object, so just
// fill out an empty BucketCounter for each bucket in the group Desc for now.
for range item.GetDesc().GetBuckets() {
bucketCounter := ofp.BucketCounter{}
bucketCounter.SetPacketCount(0)
bucketCounter.SetByteCount(0)
bucketStatsList = append(bucketStatsList, &bucketCounter)
}
entry.SetBucketStats(bucketStatsList)
groupStatsEntries = append(groupStatsEntries, &entry)
}
response.SetEntries(groupStatsEntries)
return response, nil
}
func (ofc *OFConnection) handleGroupStatsDescRequest(request *ofp.GroupDescStatsRequest) (*ofp.GroupDescStatsReply, error) {
volthaClient := ofc.VolthaClient.Get()
if volthaClient == nil {
return nil, NoVolthaConnectionError
}
response := ofp.NewGroupDescStatsReply()
response.SetVersion(request.GetVersion())
response.SetXid(request.GetXid())
response.SetFlags(ofp.StatsReplyFlags(request.GetFlags()))
reply, err := volthaClient.ListLogicalDeviceFlowGroups(context.Background(),
&common.ID{Id: ofc.DeviceID})
if err != nil {
return nil, err
}
var groupDescStatsEntries []*ofp.GroupDescStatsEntry
for _, item := range reply.GetItems() {
desc := item.GetDesc()
buckets := volthaBucketsToOpenflow(desc.Buckets)
groupDesc := &ofp.GroupDescStatsEntry{
GroupType: volthaGroupTypeToOpenflow(desc.Type),
GroupId: desc.GroupId,
Buckets: buckets,
}
groupDescStatsEntries = append(groupDescStatsEntries, groupDesc)
}
response.SetEntries(groupDescStatsEntries)
return response, nil
}
func (ofc *OFConnection) handleGroupFeatureStatsRequest(request *ofp.GroupFeaturesStatsRequest) (*ofp.GroupFeaturesStatsReply, error) {
response := ofp.NewGroupFeaturesStatsReply()
response.SetVersion(request.GetVersion())
response.SetXid(request.GetXid())
response.SetFlags(ofp.StatsReplyFlags(request.GetFlags()))
//TODO wire this to voltha core when it implements
return response, nil
}
func (ofc *OFConnection) handleMeterStatsRequest(request *ofp.MeterStatsRequest) (*ofp.MeterStatsReply, error) {
volthaClient := ofc.VolthaClient.Get()
if volthaClient == nil {
return nil, NoVolthaConnectionError
}
response := ofp.NewMeterStatsReply()
response.SetVersion(request.GetVersion())
response.SetXid(request.GetXid())
response.SetFlags(ofp.StatsReplyFlags(request.GetFlags()))
resp, err := volthaClient.ListLogicalDeviceMeters(context.Background(),
&common.ID{Id: ofc.DeviceID})
if err != nil {
return nil, err
}
var meterStats []*ofp.MeterStats
for _, item := range resp.Items {
meterStat := ofp.NewMeterStats()
stats := item.Stats
meterStat.DurationNsec = stats.DurationNsec
meterStat.DurationSec = stats.DurationSec
meterStat.ByteInCount = stats.ByteInCount
meterStat.FlowCount = stats.FlowCount
meterStat.MeterId = stats.MeterId
var bandStats []*ofp.MeterBandStats
for _, bStat := range stats.BandStats {
bandStat := ofp.NewMeterBandStats()
bandStat.ByteBandCount = bStat.ByteBandCount
bandStat.PacketBandCount = bStat.PacketBandCount
bandStats = append(bandStats, bandStat)
}
meterStat.SetBandStats(bandStats)
meterStats = append(meterStats, meterStat)
}
response.SetEntries(meterStats)
return response, nil
}
func (ofc *OFConnection) handleMeterConfigStatsRequest(request *ofp.MeterConfigStatsRequest) (*ofp.MeterConfigStatsReply, error) {
response := ofp.NewMeterConfigStatsReply()
response.SetVersion(request.GetVersion())
response.SetXid(request.GetXid())
response.SetFlags(ofp.StatsReplyFlags(request.GetFlags()))
//TODO wire this to voltha core when it implements
return response, nil
}
func (ofc *OFConnection) handleTableFeaturesStatsRequest(request *ofp.TableFeaturesStatsRequest) (*ofp.TableFeaturesStatsReply, error) {
response := ofp.NewTableFeaturesStatsReply()
response.SetVersion(request.GetVersion())
response.SetXid(request.GetXid())
response.SetFlags(ofp.StatsReplyFlags(request.GetFlags()))
//TODO wire this to voltha core when it implements
return response, nil
}
func (ofc *OFConnection) handleTableStatsRequest(request *ofp.TableStatsRequest) (*ofp.TableStatsReply, error) {
var response = ofp.NewTableStatsReply()
response.SetFlags(ofp.StatsReplyFlags(request.GetFlags()))
response.SetVersion(request.GetVersion())
response.SetXid(request.GetXid())
response.SetFlags(ofp.StatsReplyFlags(request.GetFlags()))
return response, nil
}
func (ofc *OFConnection) handleQueueStatsRequest(request *ofp.QueueStatsRequest) (*ofp.QueueStatsReply, error) {
response := ofp.NewQueueStatsReply()
response.SetVersion(request.GetVersion())
response.SetXid(request.GetXid())
response.SetFlags(ofp.StatsReplyFlags(request.GetFlags()))
//TODO wire this to voltha core when it implements
return response, nil
}
func (ofc *OFConnection) handlePortStatsRequest(request *ofp.PortStatsRequest) ([]*ofp.PortStatsReply, error) {
volthaClient := ofc.VolthaClient.Get()
if volthaClient == nil {
return nil, NoVolthaConnectionError
}
reply, err := volthaClient.ListLogicalDevicePorts(context.Background(),
&common.ID{Id: ofc.DeviceID})
if err != nil {
return nil, err
}
var entries []*ofp.PortStatsEntry
if request.GetPortNo() == 0xffffffff { //all ports
for _, port := range reply.GetItems() {
entries = append(entries, parsePortStats(port))
}
} else { //find right port that is requested
for _, port := range reply.GetItems() {
if port.GetOfpPortStats().GetPortNo() == uint32(request.GetPortNo()) {
entries = append(entries, parsePortStats(port))
}
}
}
var responses []*ofp.PortStatsReply
chunkSize := ofc.portsChunkSize
total := len(entries) / chunkSize
n := 0
for n <= total {
chunk := entries[n*chunkSize : min((n*chunkSize)+chunkSize, len(entries))]
if len(chunk) == 0 {
break
}
response := ofp.NewPortStatsReply()
response.SetXid(request.GetXid())
response.SetVersion(request.GetVersion())
if total != n {
response.SetFlags(ofp.StatsReplyFlags(ofp.OFPSFReplyMore))
}
response.SetEntries(entries[n*chunkSize : min((n*chunkSize)+chunkSize, len(entries))])
responses = append(responses, response)
n++
}
return responses, nil
}
func (ofc *OFConnection) handlePortDescStatsRequest(request *ofp.PortDescStatsRequest) ([]*ofp.PortDescStatsReply, error) {
volthaClient := ofc.VolthaClient.Get()
if volthaClient == nil {
return nil, NoVolthaConnectionError
}
logicalDevice, err := volthaClient.GetLogicalDevice(context.Background(),
&common.ID{Id: ofc.DeviceID})
if err != nil {
return nil, err
}
var entries []*ofp.PortDesc
for _, port := range logicalDevice.GetPorts() {
ofpPort := port.GetOfpPort()
var entry ofp.PortDesc
entry.SetPortNo(ofp.Port(ofpPort.GetPortNo()))
var octets []byte
for _, val := range ofpPort.GetHwAddr() {
octets = append(octets, byte(val))
}
hwAddr := net.HardwareAddr(octets)
entry.SetHwAddr(hwAddr)
entry.SetName(PadString(ofpPort.GetName(), 16))
entry.SetConfig(ofp.PortConfig(ofpPort.GetConfig()))
entry.SetState(ofp.PortState(ofpPort.GetState()))
entry.SetCurr(ofp.PortFeatures(ofpPort.GetCurr()))
entry.SetAdvertised(ofp.PortFeatures(ofpPort.GetAdvertised()))
entry.SetSupported(ofp.PortFeatures(ofpPort.GetSupported()))
entry.SetPeer(ofp.PortFeatures(ofpPort.GetPeer()))
entry.SetCurrSpeed(ofpPort.GetCurrSpeed())
entry.SetMaxSpeed(ofpPort.GetMaxSpeed())
entries = append(entries, &entry)
}
var responses []*ofp.PortDescStatsReply
chunkSize := ofc.portsDescChunkSize
total := len(entries) / chunkSize
n := 0
for n <= total {
chunk := entries[n*chunkSize : min((n*chunkSize)+chunkSize, len(entries))]
if len(chunk) == 0 {
break
}
response := ofp.NewPortDescStatsReply()
response.SetVersion(request.GetVersion())
response.SetXid(request.GetXid())
response.SetFlags(ofp.StatsReplyFlags(request.GetFlags()))
if total != n {
response.SetFlags(ofp.StatsReplyFlags(ofp.OFPSFReplyMore))
}
response.SetEntries(chunk)
responses = append(responses, response)
n++
}
return responses, nil
}
// Interestingly enough there is no min function fot two integers
func min(a, b int) int {
if a < b {
return a
}
return b
}
func (ofc *OFConnection) handleMeterFeatureStatsRequest(request *ofp.MeterFeaturesStatsRequest) (*ofp.MeterFeaturesStatsReply, error) {
response := ofp.NewMeterFeaturesStatsReply()
response.SetXid(request.GetXid())
response.SetVersion(request.GetVersion())
response.SetFlags(ofp.StatsReplyFlags(request.GetFlags()))
meterFeatures := ofp.NewMeterFeatures()
meterFeatures.Capabilities = ofp.OFPMFKbps
meterFeatures.BandTypes = ofp.OFPMBTDrop
meterFeatures.MaxMeter = 0xffffffff
meterFeatures.MaxBands = 0xff
meterFeatures.MaxColor = 0xff
response.Features = *meterFeatures
return response, nil
}
func (ofc *OFConnection) handleExperimenterStatsRequest(request *ofp.ExperimenterStatsRequest) (*ofp.ExperimenterStatsReply, error) {
response := ofp.NewExperimenterStatsReply(request.GetExperimenter())
response.SetVersion(request.GetVersion())
response.SetXid(request.GetXid())
response.SetFlags(ofp.StatsReplyFlags(request.GetFlags()))
//TODO wire this to voltha core when it implements
return response, nil
}