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ofctrl_meter.go
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ofctrl_meter.go
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// Copyright 2021 Antrea 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 (
"antrea.io/libOpenflow/openflow15"
"antrea.io/libOpenflow/util"
"antrea.io/ofnet/ofctrl"
)
type ofMeter struct {
ofctrl *ofctrl.Meter
bridge *OFBridge
}
func (m *ofMeter) Reset() {
m.ofctrl.Switch = m.bridge.ofSwitch
}
// Note: use OFSwitch to directly send MeterModification message rather than bundle message is because the
// current ofnet implementation for OpenFlow bundle does not support adding MeterModification.
func (m *ofMeter) Add() error {
msg := m.ofctrl.GetBundleMessage(openflow15.MC_ADD)
return m.ofctrl.Switch.Send(msg.GetMessage())
}
func (m *ofMeter) Modify() error {
msg := m.ofctrl.GetBundleMessage(openflow15.MC_MODIFY)
return m.ofctrl.Switch.Send(msg.GetMessage())
}
func (m *ofMeter) Delete() error {
meterMod := openflow15.NewMeterMod()
meterMod.MeterId = m.ofctrl.ID
meterMod.Command = openflow15.MC_DELETE
return m.ofctrl.Switch.Send(meterMod)
}
func (m *ofMeter) Type() EntryType {
return MeterEntry
}
func (m *ofMeter) GetBundleMessages(entryOper OFOperation) ([]ofctrl.OpenFlowModMessage, error) {
var operation int
switch entryOper {
case AddMessage:
operation = openflow15.MC_ADD
case ModifyMessage:
operation = openflow15.MC_MODIFY
case DeleteMessage:
operation = openflow15.MC_DELETE
}
message := m.ofctrl.GetBundleMessage(operation)
return []ofctrl.OpenFlowModMessage{message}, nil
}
func (m *ofMeter) ResetMeterBands() Meter {
m.ofctrl.MeterBands = nil
return m
}
func (m *ofMeter) MeterBand() MeterBandBuilder {
return &meterBandBuilder{
meter: m,
meterBandHeader: openflow15.NewMeterBandHeader(),
prevLevel: 0,
experimenter: 0,
}
}
type meterBandBuilder struct {
meter *ofMeter
meterBandHeader *openflow15.MeterBandHeader
prevLevel uint8
experimenter uint32
}
func (m *meterBandBuilder) MeterType(meterType ofctrl.MeterType) MeterBandBuilder {
m.meterBandHeader.Type = uint16(meterType)
return m
}
func (m *meterBandBuilder) Rate(rate uint32) MeterBandBuilder {
m.meterBandHeader.Rate = rate
return m
}
func (m *meterBandBuilder) Burst(burst uint32) MeterBandBuilder {
m.meterBandHeader.BurstSize = burst
return m
}
func (m *meterBandBuilder) PrecLevel(precLevel uint8) MeterBandBuilder {
m.prevLevel = precLevel
return m
}
func (m *meterBandBuilder) Experimenter(experimenter uint32) MeterBandBuilder {
m.experimenter = experimenter
return m
}
func (m *meterBandBuilder) Done() Meter {
var mb util.Message
switch m.meterBandHeader.Type {
case uint16(ofctrl.MeterDrop):
mbDrop := new(openflow15.MeterBandDrop)
mbDrop.MeterBandHeader = *m.meterBandHeader
mb = mbDrop
case uint16(ofctrl.MeterDSCPRemark):
mbDscp := new(openflow15.MeterBandDSCP)
mbDscp.MeterBandHeader = *m.meterBandHeader
mbDscp.PrecLevel = m.prevLevel
mb = mbDscp
case uint16(ofctrl.MeterExperimenter):
mbExp := new(openflow15.MeterBandExperimenter)
mbExp.MeterBandHeader = *m.meterBandHeader
mbExp.Experimenter = m.experimenter
mb = mbExp
}
m.meter.ofctrl.AddMeterBand(&mb)
return m.meter
}