openflow

package
v0.5.1 Latest Latest
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 Go to latest Published: Apr 2, 2020 License: Apache-2.0 Imports: 9 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	ProtocolIP   protocol = "ip"
	ProtocolARP  protocol = "arp"
	ProtocolTCP  protocol = "tcp"
	ProtocolUDP  protocol = "udp"
	ProtocolSCTP protocol = "sctp"
	ProtocolICMP protocol = "icmp"
)
View Source 
const (
	NxmFieldSrcMAC  = "NXM_OF_ETH_SRC"
	NxmFieldDstMAC  = "NXM_OF_ETH_DST"
	NxmFieldARPSha  = "NXM_NX_ARP_SHA"
	NxmFieldARPTha  = "NXM_NX_ARP_THA"
	NxmFieldARPSpa  = "NXM_OF_ARP_SPA"
	NxmFieldARPTpa  = "NXM_OF_ARP_TPA"
	NxmFieldCtLabel = "NXM_NX_CT_LABEL"
	NxmFieldCtMark  = "NXM_NX_CT_MARK"
	NxmFieldARPOp   = "NXM_OF_ARP_OP"
	NxmFieldReg     = "NXM_NX_REG"
)
View Source 
const (
	OVSRunDir = "/var/run/openvswitch"
)

Variables

This section is empty.

Functions

This section is empty.

Types

type Action 

type Action interface {
	LoadARPOperation(value uint16) FlowBuilder
	LoadRegRange(regID int, value uint32, to Range) FlowBuilder
	LoadRange(name string, addr uint64, to Range) FlowBuilder
	Move(from, to string) FlowBuilder
	MoveRange(fromName, toName string, from, to Range) FlowBuilder
	Resubmit(port uint16, table TableIDType) FlowBuilder
	ResubmitToTable(table TableIDType) FlowBuilder
	CT(commit bool, tableID TableIDType, zone int) CTAction
	Drop() FlowBuilder
	Output(port int) FlowBuilder
	OutputFieldRange(from string, rng Range) FlowBuilder
	OutputRegRange(regID int, rng Range) FlowBuilder
	OutputInPort() FlowBuilder
	SetDstMAC(addr net.HardwareAddr) FlowBuilder
	SetSrcMAC(addr net.HardwareAddr) FlowBuilder
	SetARPSha(addr net.HardwareAddr) FlowBuilder
	SetARPTha(addr net.HardwareAddr) FlowBuilder
	SetARPSpa(addr net.IP) FlowBuilder
	SetARPTpa(addr net.IP) FlowBuilder
	SetSrcIP(addr net.IP) FlowBuilder
	SetDstIP(addr net.IP) FlowBuilder
	SetTunnelDst(addr net.IP) FlowBuilder
	DecTTL() FlowBuilder
	Normal() FlowBuilder
	Conjunction(conjID uint32, clauseID uint8, nClause uint8) FlowBuilder
}

type Bridge 

type Bridge interface {
	CreateTable(id, next TableIDType, missAction MissActionType) Table
	DeleteTable(id TableIDType) bool
	DumpTableStatus() []TableStatus
	// DumpFlows queries the Openflow entries from OFSwitch. The filter of the query is Openflow cookieID; the result is
	// a map from flow cookieID to FlowStates.
	DumpFlows(cookieID, cookieMask uint64) map[uint64]*FlowStates
	// DeleteFlowsByCookie removes Openflow entries from OFSwitch. The removed Openflow entries use the specific CookieID.
	DeleteFlowsByCookie(cookieID, cookieMask uint64) error
	// AddFlowsInBundle syncs multiple Openflow entries in a single transaction. This operation could add new flows in
	// "addFlows", modify flows in "modFlows", and remove flows in "delFlows" in the same bundle.
	AddFlowsInBundle(addflows []Flow, modFlows []Flow, delFlows []Flow) error
	// Connect initiates connection to the OFSwitch. It will block until the connection is established. connectCh is used to
	// send notification whenever the switch is connected or reconnected.
	Connect(maxRetrySec int, connectCh chan struct{}) error
	// Disconnect stops connection to the OFSwitch.
	Disconnect() error
	// IsConnected returns the OFSwitch's connection status. The result is true if the OFSwitch is connected.
	IsConnected() bool
}

Bridge defines operations on an openflow bridge.

func NewOFBridge added in v0.2.0 

func NewOFBridge(br string) Bridge

type CTAction 

type CTAction interface {
	LoadToMark(value uint32) CTAction
	LoadToLabelRange(value uint64, rng *Range) CTAction
	MoveToLabel(fromName string, fromRng, labelRng *Range) CTAction
	// NAT action is used if the packet is not committed into the conntrack zone, and is required to leverage the
	// original NAT configurations.
	NAT() CTAction
	// SNAT actions is used to translate the source IP to a specific address or address in a pool when committing the
	// packet into the conntrack zone. If a single IP is used as the target address, StartIP and EndIP in the range
	// should be the same. portRange could be nil.
	SNAT(ipRange *IPRange, portRange *PortRange) CTAction
	// DNAT actions is used to translate the destination IP to a specific address or address in a pool when committing
	// the packet into the conntrack zone. If a single IP is used as the target address, StartIP and EndIP in the range
	// should be the same. portRange could be nil.
	DNAT(ipRange *IPRange, portRange *PortRange) CTAction
	CTDone() FlowBuilder
}

type Flow 

type Flow interface {
	Add() error
	Modify() error
	Delete() error
	MatchString() string
	// CopyToBuilder returns a new FlowBuilder that copies the matches of the Flow, but does not copy the actions.
	CopyToBuilder() FlowBuilder
	// Reset ensures that the ofFlow object is "correct" and that the Add /
	// Modify / Delete methods can be called on this object. This method
	// should be called if a reconnection event happenened.
	Reset()
}

type FlowBuilder 

type FlowBuilder interface {
	MatchProtocol(name protocol) FlowBuilder
	MatchReg(regID int, data uint32) FlowBuilder
	MatchRegRange(regID int, data uint32, rng Range) FlowBuilder
	MatchInPort(inPort uint32) FlowBuilder
	MatchDstIP(ip net.IP) FlowBuilder
	MatchDstIPNet(ipNet net.IPNet) FlowBuilder
	MatchSrcIP(ip net.IP) FlowBuilder
	MatchSrcIPNet(ipNet net.IPNet) FlowBuilder
	MatchDstMAC(mac net.HardwareAddr) FlowBuilder
	MatchSrcMAC(mac net.HardwareAddr) FlowBuilder
	MatchARPSha(mac net.HardwareAddr) FlowBuilder
	MatchARPTha(mac net.HardwareAddr) FlowBuilder
	MatchARPSpa(ip net.IP) FlowBuilder
	MatchARPTpa(ip net.IP) FlowBuilder
	MatchARPOp(op uint16) FlowBuilder
	MatchCTStateNew(isSet bool) FlowBuilder
	MatchCTStateRel(isSet bool) FlowBuilder
	MatchCTStateRpl(isSet bool) FlowBuilder
	MatchCTStateEst(isSet bool) FlowBuilder
	MatchCTStateTrk(isSet bool) FlowBuilder
	MatchCTStateInv(isSet bool) FlowBuilder
	MatchCTMark(value uint32) FlowBuilder
	MatchConjID(value uint32) FlowBuilder
	MatchTCPDstPort(port uint16) FlowBuilder
	MatchUDPDstPort(port uint16) FlowBuilder
	MatchSCTPDstPort(port uint16) FlowBuilder
	Cookie(cookieID uint64) FlowBuilder
	Action() Action
	Done() Flow
}

type FlowStates added in v0.2.0 

type FlowStates struct {
	TableID         uint8
	PacketCount     uint64
	DurationNSecond uint32
}

type IPRange added in v0.5.0 

type IPRange struct {
	StartIP net.IP
	EndIP   net.IP
}

type MissActionType 

type MissActionType uint32
const (
	TableMissActionDrop MissActionType = iota
	TableMissActionNormal
	TableMissActionNext
	TableMissActionNone
)

type OFBridge added in v0.2.0 

type OFBridge struct {

	// sync.RWMutex protects tableCache from concurrent modification and iteration.
	sync.RWMutex
	// contains filtered or unexported fields
}

OFBridge implements openflow.Bridge.

func (*OFBridge) AddFlowsInBundle added in v0.3.0 

func (b *OFBridge) AddFlowsInBundle(addflows []Flow, modFlows []Flow, delFlows []Flow) error

func (*OFBridge) Connect added in v0.2.0 

func (b *OFBridge) Connect(maxRetrySec int, connectionCh chan struct{}) error

Connect initiates the connection to the OFSwitch, and initializes ofTables after connected.

func (*OFBridge) CreateTable added in v0.2.0 

func (b *OFBridge) CreateTable(id, next TableIDType, missAction MissActionType) Table

func (*OFBridge) DeleteFlowsByCookie added in v0.2.0 

func (b *OFBridge) DeleteFlowsByCookie(cookieID, cookieMask uint64) error

DeleteFlowsByCookie removes Openflow entries from OFSwitch. The removed Openflow entries use the specific CookieID.

func (*OFBridge) DeleteTable added in v0.2.0 

func (b *OFBridge) DeleteTable(id TableIDType) bool

DeleteTable removes the table from ofctrl.OFSwitch, and remove from local cache.

func (*OFBridge) Disconnect added in v0.2.0 

func (b *OFBridge) Disconnect() error

Disconnect stops connection to the OFSwitch.

func (*OFBridge) DumpFlows added in v0.2.0 

func (b *OFBridge) DumpFlows(cookieID, cookieMask uint64) map[uint64]*FlowStates

DumpFlows queries the Openflow entries from OFSwitch, the filter of the query is Openflow cookieID. The result is a map from flow cookieID to FlowStates.

func (*OFBridge) DumpTableStatus added in v0.2.0 

func (b *OFBridge) DumpTableStatus() []TableStatus

DumpTableStatus dumps table status from local cache.

func (*OFBridge) IsConnected added in v0.2.0 

func (b *OFBridge) IsConnected() bool

func (*OFBridge) MaxRetry added in v0.2.0 

func (b *OFBridge) MaxRetry() int

MaxRetry is a callback from OFController. It sets the max retry count that OFController attempts to connect to OFSwitch.

func (*OFBridge) MultipartReply added in v0.2.0 

func (b *OFBridge) MultipartReply(sw *ofctrl.OFSwitch, rep *openflow13.MultipartReply)

MultipartReply is a callback when multipartReply message is received on ofctrl.OFSwitch is connected. Client uses this method to handle the reply message if it has customized MultipartRequest message.

func (*OFBridge) PacketRcvd added in v0.2.0 

func (b *OFBridge) PacketRcvd(sw *ofctrl.OFSwitch, packet *ofctrl.PacketIn)

PacketRcvd is a callback when a packetIn is received on ofctrl.OFSwitch.

func (*OFBridge) RetryInterval added in v0.2.0 

func (b *OFBridge) RetryInterval() time.Duration

RetryInterval is a callback from OFController. It sets the interval in that the OFController will initiate next connection to OFSwitch if it fails this time.

func (*OFBridge) SwitchConnected added in v0.2.0 

func (b *OFBridge) SwitchConnected(sw *ofctrl.OFSwitch)

SwitchConnected is a callback when the remote OFSwitch is connected.

func (*OFBridge) SwitchDisconnected added in v0.2.0 

func (b *OFBridge) SwitchDisconnected(sw *ofctrl.OFSwitch)

type PortRange added in v0.5.0 

type PortRange struct {
	StartPort uint16
	EndPort   uint16
}

type Range 

type Range [2]uint32

func (*Range) ToNXRange added in v0.2.0 

func (r *Range) ToNXRange() *openflow13.NXRange

type Table 

type Table interface {
	GetID() TableIDType
	BuildFlow(priority uint16) FlowBuilder
	GetMissAction() MissActionType
	Status() TableStatus
	GetNext() TableIDType
}

type TableIDType 

type TableIDType uint8
const LastTableID TableIDType = 0xff

type TableStatus 

type TableStatus struct {
	ID         uint      `json:"id"`
	FlowCount  uint      `json:"flowCount"`
	UpdateTime time.Time `json:"updateTime"`
}

TableStatus represents the status of a specific flow table. The status is useful for debugging.

Source Files

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Directories

Path Synopsis
Package testing is a generated GoMock package.
 Package testing is a generated GoMock package.

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