flows

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 Go to latest Published: Jan 17, 2024 License: Apache-2.0 Imports: 12 Imported by: 2

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Overview

* Copyright 2020-2024 Open Networking Foundation (ONF) and the ONF Contributors * * 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.

* Copyright 2018-2024 Open Networking Foundation (ONF) and the ONF Contributors * * 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.

Index

Constants

This section is empty.

Variables

View Source 
var (
	// Instructions shortcut
	APPLY_ACTIONS  = ofp.OfpInstructionType_OFPIT_APPLY_ACTIONS
	WRITE_METADATA = ofp.OfpInstructionType_OFPIT_WRITE_METADATA
	METER_ACTION   = ofp.OfpInstructionType_OFPIT_METER

	//OFPAT_* shortcuts
	OUTPUT       = ofp.OfpActionType_OFPAT_OUTPUT
	COPY_TTL_OUT = ofp.OfpActionType_OFPAT_COPY_TTL_OUT
	COPY_TTL_IN  = ofp.OfpActionType_OFPAT_COPY_TTL_IN
	SET_MPLS_TTL = ofp.OfpActionType_OFPAT_SET_MPLS_TTL
	DEC_MPLS_TTL = ofp.OfpActionType_OFPAT_DEC_MPLS_TTL
	PUSH_VLAN    = ofp.OfpActionType_OFPAT_PUSH_VLAN
	POP_VLAN     = ofp.OfpActionType_OFPAT_POP_VLAN
	PUSH_MPLS    = ofp.OfpActionType_OFPAT_PUSH_MPLS
	POP_MPLS     = ofp.OfpActionType_OFPAT_POP_MPLS
	SET_QUEUE    = ofp.OfpActionType_OFPAT_SET_QUEUE
	GROUP        = ofp.OfpActionType_OFPAT_GROUP
	SET_NW_TTL   = ofp.OfpActionType_OFPAT_SET_NW_TTL
	NW_TTL       = ofp.OfpActionType_OFPAT_DEC_NW_TTL
	SET_FIELD    = ofp.OfpActionType_OFPAT_SET_FIELD
	PUSH_PBB     = ofp.OfpActionType_OFPAT_PUSH_PBB
	POP_PBB      = ofp.OfpActionType_OFPAT_POP_PBB
	EXPERIMENTER = ofp.OfpActionType_OFPAT_EXPERIMENTER

	//OFPXMT_OFB_* shortcuts (incomplete)
	IN_PORT         = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IN_PORT
	IN_PHY_PORT     = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IN_PHY_PORT
	METADATA        = ofp.OxmOfbFieldTypes_OFPXMT_OFB_METADATA
	ETH_DST         = ofp.OxmOfbFieldTypes_OFPXMT_OFB_ETH_DST
	ETH_SRC         = ofp.OxmOfbFieldTypes_OFPXMT_OFB_ETH_SRC
	ETH_TYPE        = ofp.OxmOfbFieldTypes_OFPXMT_OFB_ETH_TYPE
	VLAN_VID        = ofp.OxmOfbFieldTypes_OFPXMT_OFB_VLAN_VID
	VLAN_PCP        = ofp.OxmOfbFieldTypes_OFPXMT_OFB_VLAN_PCP
	IP_DSCP         = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IP_DSCP
	IP_ECN          = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IP_ECN
	IP_PROTO        = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IP_PROTO
	IPV4_SRC        = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IPV4_SRC
	IPV4_DST        = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IPV4_DST
	TCP_SRC         = ofp.OxmOfbFieldTypes_OFPXMT_OFB_TCP_SRC
	TCP_DST         = ofp.OxmOfbFieldTypes_OFPXMT_OFB_TCP_DST
	UDP_SRC         = ofp.OxmOfbFieldTypes_OFPXMT_OFB_UDP_SRC
	UDP_DST         = ofp.OxmOfbFieldTypes_OFPXMT_OFB_UDP_DST
	SCTP_SRC        = ofp.OxmOfbFieldTypes_OFPXMT_OFB_SCTP_SRC
	SCTP_DST        = ofp.OxmOfbFieldTypes_OFPXMT_OFB_SCTP_DST
	ICMPV4_TYPE     = ofp.OxmOfbFieldTypes_OFPXMT_OFB_ICMPV4_TYPE
	ICMPV4_CODE     = ofp.OxmOfbFieldTypes_OFPXMT_OFB_ICMPV4_CODE
	ARP_OP          = ofp.OxmOfbFieldTypes_OFPXMT_OFB_ARP_OP
	ARP_SPA         = ofp.OxmOfbFieldTypes_OFPXMT_OFB_ARP_SPA
	ARP_TPA         = ofp.OxmOfbFieldTypes_OFPXMT_OFB_ARP_TPA
	ARP_SHA         = ofp.OxmOfbFieldTypes_OFPXMT_OFB_ARP_SHA
	ARP_THA         = ofp.OxmOfbFieldTypes_OFPXMT_OFB_ARP_THA
	IPV6_SRC        = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IPV6_SRC
	IPV6_DST        = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IPV6_DST
	IPV6_FLABEL     = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IPV6_FLABEL
	ICMPV6_TYPE     = ofp.OxmOfbFieldTypes_OFPXMT_OFB_ICMPV6_TYPE
	ICMPV6_CODE     = ofp.OxmOfbFieldTypes_OFPXMT_OFB_ICMPV6_CODE
	IPV6_ND_TARGET  = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IPV6_ND_TARGET
	OFB_IPV6_ND_SLL = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IPV6_ND_SLL
	IPV6_ND_TLL     = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IPV6_ND_TLL
	MPLS_LABEL      = ofp.OxmOfbFieldTypes_OFPXMT_OFB_MPLS_LABEL
	MPLS_TC         = ofp.OxmOfbFieldTypes_OFPXMT_OFB_MPLS_TC
	MPLS_BOS        = ofp.OxmOfbFieldTypes_OFPXMT_OFB_MPLS_BOS
	PBB_ISID        = ofp.OxmOfbFieldTypes_OFPXMT_OFB_PBB_ISID
	TUNNEL_ID       = ofp.OxmOfbFieldTypes_OFPXMT_OFB_TUNNEL_ID
	IPV6_EXTHDR     = ofp.OxmOfbFieldTypes_OFPXMT_OFB_IPV6_EXTHDR
)

Functions

func ArpOp 

func ArpOp(arpOp uint32) *ofp.OfpOxmOfbField

func ArpSha 

func ArpSha(arpSha []byte) *ofp.OfpOxmOfbField

func ArpSpa 

func ArpSpa(arpSpa uint32) *ofp.OfpOxmOfbField

func ArpTha 

func ArpTha(arpTha []byte) *ofp.OfpOxmOfbField

func ArpTpa 

func ArpTpa(arpTpa uint32) *ofp.OfpOxmOfbField

func ConvertToMulticastMacBytes 

func ConvertToMulticastMacBytes(ip uint32) []byte

ConvertToMulticastMacBytes returns equivalent mac address of the given multicast ip address

func ConvertToMulticastMacInt 

func ConvertToMulticastMacInt(ip uint32) uint64

ConvertToMulticastMacInt returns equivalent mac address of the given multicast ip address

func EthDst 

func EthDst(ethDst uint64) *ofp.OfpOxmOfbField

should Metadata_ofp used here ?????

func EthSrc 

func EthSrc(ethSrc uint64) *ofp.OfpOxmOfbField

should Metadata_ofp used here ?????

func EthType 

func EthType(ethType uint32) *ofp.OfpOxmOfbField

func Experimenter 

func Experimenter(experimenter uint32, data []byte) *ofp.OfpAction

func FindFlowById 

func FindFlowById(flows []*ofp.OfpFlowStats, flow *ofp.OfpFlowStats) int

FindFlowById returns the index of the flow in the flows array if present. Otherwise, it returns -1

func FindFlows 

func FindFlows(flows []*ofp.OfpFlowStats, flow *ofp.OfpFlowStats) int

FindFlows returns the index in flows where flow if present. Otherwise, it returns -1

func FindGroup 

func FindGroup(groups []*ofp.OfpGroupEntry, groupId uint32) int

FindGroup returns index of group if found, else returns -1

func FindOverlappingFlows 

func FindOverlappingFlows(flows []*ofp.OfpFlowStats, mod *ofp.OfpFlowMod) []*ofp.OfpFlowStats

FindOverlappingFlows return a list of overlapping flow(s) where mod is the flow request

func FlowHasOutGroup 

func FlowHasOutGroup(flow *ofp.OfpFlowStats, groupID uint32) bool

FlowHasOutGroup return True if flow has a output command with the given out_group

func FlowHasOutPort 

func FlowHasOutPort(flow *ofp.OfpFlowStats, outPort uint32) bool

FlowHasOutPort returns True if flow has a output command with the given out_port

func FlowMatch 

func FlowMatch(f1 *ofp.OfpFlowStats, f2 *ofp.OfpFlowStats) bool

FlowMatch returns true if two flows matches on the following flow attributes: TableId, Priority, Flags, Cookie, Match

func FlowMatchesMod 

func FlowMatchesMod(flow *ofp.OfpFlowStats, mod *ofp.OfpFlowMod) bool

FlowMatchesMod returns True if given flow is "covered" by the wildcard flow_mod, taking into consideration of both exact matches as well as masks-based match fields if any. Otherwise return False

func FlowStatsEntryFromFlowModMessage 

func FlowStatsEntryFromFlowModMessage(mod *ofp.OfpFlowMod) (*ofp.OfpFlowStats, error)

flowStatsEntryFromFlowModMessage maps an ofp_flow_mod message to an ofp_flow_stats message

func FlowsDeleteByGroupId 

func FlowsDeleteByGroupId(flows []*ofp.OfpFlowStats, groupId uint32) (bool, []*ofp.OfpFlowStats)

func GetActions 

func GetActions(flow *ofp.OfpFlowStats, exclude ...ofp.OfpActionType) []*ofp.OfpAction

func GetChildPortFromTunnelId 

func GetChildPortFromTunnelId(flow *ofp.OfpFlowStats) uint32

Extract the child device port from a flow that contains the parent device peer port. Typically the UNI port of an ONU child device. Per TST agreement this will be the lower 32 bits of tunnel id reserving upper 32 bits for later use

func GetEgressPortNumberFromWriteMetadata 

func GetEgressPortNumberFromWriteMetadata(ctx context.Context, flow *ofp.OfpFlowStats) uint32

func GetGotoTableId 

func GetGotoTableId(flow *ofp.OfpFlowStats) uint32

func GetGroup 

func GetGroup(flow *ofp.OfpFlowStats) uint32

func GetInPort 

func GetInPort(flow *ofp.OfpFlowStats) uint32

func GetInnerTagFromMetaData 

func GetInnerTagFromMetaData(ctx context.Context, flow *ofp.OfpFlowStats) uint16

func GetInnerTagFromWriteMetaData 

func GetInnerTagFromWriteMetaData(ctx context.Context, metadata uint64) uint16

func GetMetaData 

func GetMetaData(ctx context.Context, flow *ofp.OfpFlowStats) uint32

GetMetaData - legacy get method (only want lower 32 bits)

func GetMetaData64Bit 

func GetMetaData64Bit(ctx context.Context, flow *ofp.OfpFlowStats) uint64

func GetMetadataFlowModArgs 

func GetMetadataFlowModArgs(kw OfpFlowModArgs) uint64

Function returns the metadata if the "write_metadata" is present in the map, otherwise return nil

func GetMetadataFromWriteMetadataAction 

func GetMetadataFromWriteMetadataAction(ctx context.Context, flow *ofp.OfpFlowStats) uint64

function returns write metadata value from write_metadata action field

func GetMeterId 

func GetMeterId(flow *ofp.OfpFlowStats) uint32

func GetMeterIdFlowModArgs 

func GetMeterIdFlowModArgs(kw OfpFlowModArgs) uint32

GetMeterIdFlowModArgs returns the meterId if the "meter_id" is present in the map, otherwise return 0

func GetMeterIdFromFlow 

func GetMeterIdFromFlow(flow *ofp.OfpFlowStats) uint32

func GetMeterIdFromWriteMetadata 

func GetMeterIdFromWriteMetadata(ctx context.Context, flow *ofp.OfpFlowStats) uint32

func GetNextTableId 

func GetNextTableId(kw OfpFlowModArgs) *uint32

GetNextTableId returns the next table ID if the "table_id" is present in the map, otherwise return nil

func GetOfbFields 

func GetOfbFields(flow *ofp.OfpFlowStats, exclude ...ofp.OxmOfbFieldTypes) []*ofp.OfpOxmOfbField

func GetOutPort 

func GetOutPort(flow *ofp.OfpFlowStats) uint32

func GetPacketOutPort 

func GetPacketOutPort(packet *ofp.OfpPacketOut) uint32

func GetSetActionField 

func GetSetActionField(ctx context.Context, flow *ofp.OfpFlowStats, ofbType ofp.OxmOfbFieldTypes) (uint32, bool)

func GetTechProfileIDFromWriteMetaData 

func GetTechProfileIDFromWriteMetaData(ctx context.Context, metadata uint64) uint16

func GetTunnelId 

func GetTunnelId(flow *ofp.OfpFlowStats) uint64

func GetVlanVid 

func GetVlanVid(flow *ofp.OfpFlowStats) *uint32

func Group 

func Group(groupId uint32) *ofp.OfpAction

func GroupEntryFromGroupMod 

func GroupEntryFromGroupMod(mod *ofp.OfpGroupMod) *ofp.OfpGroupEntry

func HasGroup 

func HasGroup(flow *ofp.OfpFlowStats) bool

func HasNextTable 

func HasNextTable(flow *ofp.OfpFlowStats) bool

func HashFlowStats 

func HashFlowStats(flow *ofp.OfpFlowStats) (uint64, error)

HashFlowStats returns a unique 64-bit integer hash of 'table_id', 'priority', and 'match' The OF spec states that: A flow table entry is identified by its match fields and priority: the match fields and priority taken together identify a unique flow entry in the flow table.

func Icmpv4Code 

func Icmpv4Code(icmpv4Code uint32) *ofp.OfpOxmOfbField

func Icmpv4Type 

func Icmpv4Type(icmpv4Type uint32) *ofp.OfpOxmOfbField

func Icmpv6Code 

func Icmpv6Code(icmpv6Code uint32) *ofp.OfpOxmOfbField

func Icmpv6Type 

func Icmpv6Type(icmpv6Type uint32) *ofp.OfpOxmOfbField

func InPhyPort 

func InPhyPort(inPhyPort uint32) *ofp.OfpOxmOfbField

func InPort 

func InPort(inPort uint32) *ofp.OfpOxmOfbField

func IpDscp 

func IpDscp(ipDscp uint32) *ofp.OfpOxmOfbField

func IpEcn 

func IpEcn(ipEcn uint32) *ofp.OfpOxmOfbField

func IpProto 

func IpProto(ipProto uint32) *ofp.OfpOxmOfbField

func Ipv4Dst 

func Ipv4Dst(ipv4Dst uint32) *ofp.OfpOxmOfbField

func Ipv4Src 

func Ipv4Src(ipv4Src uint32) *ofp.OfpOxmOfbField

func Ipv6Dst 

func Ipv6Dst(ipv6Dst []byte) *ofp.OfpOxmOfbField

func Ipv6Exthdr 

func Ipv6Exthdr(ipv6Exthdr uint32) *ofp.OfpOxmOfbField

func Ipv6Flabel 

func Ipv6Flabel(ipv6Flabel uint32) *ofp.OfpOxmOfbField

func Ipv6NdTarget 

func Ipv6NdTarget(ipv6NdTarget []byte) *ofp.OfpOxmOfbField

func Ipv6NdTll 

func Ipv6NdTll(ipv6NdTll []byte) *ofp.OfpOxmOfbField

func Ipv6Src 

func Ipv6Src(ipv6Src []byte) *ofp.OfpOxmOfbField

func IsMulticastIp 

func IsMulticastIp(ip uint32) bool

IsMulticastIp returns true if the ip starts with the byte sequence of 1110; false otherwise.

func Metadata_ofp 

func Metadata_ofp(tableMetadata uint64) *ofp.OfpOxmOfbField

func MeterEntryFromMeterMod 

func MeterEntryFromMeterMod(ctx context.Context, meterMod *ofp.OfpMeterMod) *ofp.OfpMeterEntry

flowStatsEntryFromFlowModMessage maps an ofp_flow_mod message to an ofp_flow_stats message

func MkFlowStat 

func MkFlowStat(fa *FlowArgs) (*ofp.OfpFlowStats, error)

MkFlowStat is a helper method to build flows

func MkGroupStat 

func MkGroupStat(ga *GroupArgs) *ofp.OfpGroupEntry

func MkInstructionsFromActions 

func MkInstructionsFromActions(actions []*ofp.OfpAction) []*ofp.OfpInstruction

func MkMulticastGroupMod 

func MkMulticastGroupMod(groupId uint32, buckets []*ofp.OfpBucket, command *ofp.OfpGroupModCommand) *ofp.OfpGroupMod

func MkOxmFields 

func MkOxmFields(matchFields []ofp.OfpOxmField) []*ofp.OfpOxmField

func MkPacketIn 

func MkPacketIn(port uint32, packet []byte) *ofp.OfpPacketIn

func MkSimpleFlowMod 

func MkSimpleFlowMod(matchFields []*ofp.OfpOxmField, actions []*ofp.OfpAction, command *ofp.OfpFlowModCommand, kw OfpFlowModArgs) *ofp.OfpFlowMod

Convenience function to generare ofp_flow_mod message with OXM BASIC match composed from the match_fields, and single APPLY_ACTIONS instruction with a list if ofp_action objects.

func MplsBos 

func MplsBos(mplsBos uint32) *ofp.OfpOxmOfbField

func MplsLabel 

func MplsLabel(mplsLabel uint32) *ofp.OfpOxmOfbField

func MplsTc 

func MplsTc(mplsTc uint32) *ofp.OfpOxmOfbField

func MplsTtl 

func MplsTtl(ttl uint32) *ofp.OfpAction

func NwTtl 

func NwTtl(nwTtl uint32) *ofp.OfpAction

func OfbIpv6NdSll 

func OfbIpv6NdSll(ofbIpv6NdSll []byte) *ofp.OfpOxmOfbField

func Output 

func Output(port uint32, maxLen ...ofp.OfpControllerMaxLen) *ofp.OfpAction

func PbbIsid 

func PbbIsid(pbbIsid uint32) *ofp.OfpOxmOfbField

func PopMpls 

func PopMpls(ethType uint32) *ofp.OfpAction

func PopVlan 

func PopVlan() *ofp.OfpAction

func PushVlan 

func PushVlan(ethType uint32) *ofp.OfpAction

func SctpDst 

func SctpDst(sctpDst uint32) *ofp.OfpOxmOfbField

func SctpSrc 

func SctpSrc(sctpSrc uint32) *ofp.OfpOxmOfbField

func SetField 

func SetField(field *ofp.OfpOxmOfbField) *ofp.OfpAction

func SetMeterIdToFlow 

func SetMeterIdToFlow(flow *ofp.OfpFlowStats, meterId uint32)

func TcpDst 

func TcpDst(tcpDst uint32) *ofp.OfpOxmOfbField

func TcpSrc 

func TcpSrc(tcpSrc uint32) *ofp.OfpOxmOfbField

func ToOfpOxmField 

func ToOfpOxmField(from []*ofp.OfpOxmOfbField) []*ofp.OfpOxmField

func TunnelId 

func TunnelId(tunnelId uint64) *ofp.OfpOxmOfbField

func UdpDst 

func UdpDst(udpDst uint32) *ofp.OfpOxmOfbField

func UdpSrc 

func UdpSrc(udpSrc uint32) *ofp.OfpOxmOfbField

func UpdateOutputPortByActionType 

func UpdateOutputPortByActionType(flow *ofp.OfpFlowStats, actionType uint32, toPort uint32) *ofp.OfpFlowStats

func VlanPcp 

func VlanPcp(vlanPcp uint32) *ofp.OfpOxmOfbField

func VlanVid 

func VlanVid(vlanVid uint32) *ofp.OfpOxmOfbField

Types

type DeviceRules 

type DeviceRules struct {
	Rules map[string]*FlowsAndGroups
	// contains filtered or unexported fields
}

func NewDeviceRules 

func NewDeviceRules() *DeviceRules

func (*DeviceRules) AddFlow 

func (dr *DeviceRules) AddFlow(deviceId string, flow *ofp.OfpFlowStats)

func (*DeviceRules) AddFlowsAndGroup 

func (dr *DeviceRules) AddFlowsAndGroup(deviceId string, fg *FlowsAndGroups)

func (*DeviceRules) ClearFlows 

func (dr *DeviceRules) ClearFlows(deviceId string)

func (*DeviceRules) Copy 

func (dr *DeviceRules) Copy() *DeviceRules

func (*DeviceRules) CreateEntryIfNotExist 

func (dr *DeviceRules) CreateEntryIfNotExist(deviceId string)

CreateEntryIfNotExist creates a new deviceId in the Map if it does not exist and assigns an empty FlowsAndGroups to it. Otherwise, it does nothing.

func (*DeviceRules) FilterRules 

func (dr *DeviceRules) FilterRules(deviceIds map[string]string) *DeviceRules

func (*DeviceRules) GetRules 

func (dr *DeviceRules) GetRules() map[string]*FlowsAndGroups

func (*DeviceRules) Keys 

func (dr *DeviceRules) Keys() []string

func (*DeviceRules) RemoveRule 

func (dr *DeviceRules) RemoveRule(deviceId string)

func (*DeviceRules) String 

func (dr *DeviceRules) String() string

type FlowArgs 

type FlowArgs struct {
	MatchFields []*ofp.OfpOxmOfbField
	Actions     []*ofp.OfpAction
	Command     *ofp.OfpFlowModCommand
	Priority    uint32
	KV          OfpFlowModArgs
}

type FlowsAndGroups 

type FlowsAndGroups struct {
	Flows  *ordered_map.OrderedMap
	Groups *ordered_map.OrderedMap
}

func NewFlowsAndGroups 

func NewFlowsAndGroups() *FlowsAndGroups

func (*FlowsAndGroups) AddFlow 

func (fg *FlowsAndGroups) AddFlow(flow *ofp.OfpFlowStats)

func (*FlowsAndGroups) AddFrom 

func (fg *FlowsAndGroups) AddFrom(from *FlowsAndGroups)

AddFrom add flows and groups from the argument into this structure only if they do not already exist

func (*FlowsAndGroups) AddGroup 

func (fg *FlowsAndGroups) AddGroup(group *ofp.OfpGroupEntry)

func (*FlowsAndGroups) Copy 

func (fg *FlowsAndGroups) Copy() *FlowsAndGroups

func (*FlowsAndGroups) GetFlow 

func (fg *FlowsAndGroups) GetFlow(index int) *ofp.OfpFlowStats

func (*FlowsAndGroups) ListFlows 

func (fg *FlowsAndGroups) ListFlows() []*ofp.OfpFlowStats

func (*FlowsAndGroups) ListGroups 

func (fg *FlowsAndGroups) ListGroups() []*ofp.OfpGroupEntry

func (*FlowsAndGroups) String 

func (fg *FlowsAndGroups) String() string

type GroupArgs 

type GroupArgs struct {
	GroupId uint32
	Buckets []*ofp.OfpBucket
	Command *ofp.OfpGroupModCommand
}

type OfpFlowModArgs 

type OfpFlowModArgs map[string]uint64

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