openflow

package
v1.2.3 Latest Latest
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 Go to latest Published: Sep 24, 2021 License: Apache-2.0 Imports: 21 Imported by: 0

Documentation

Index

Constants

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"
	NxmFieldTunMetadata = "NXM_NX_TUN_METADATA"
	NxmFieldIPToS       = "NXM_OF_IP_TOS"
	NxmFieldXXReg       = "NXM_NX_XXREG"
	NxmFieldPktMark     = "NXM_NX_PKT_MARK"
)

Variables

View Source 
var IPDSCPToSRange = Range{2, 7}

IPDSCPToSRange stores the DSCP bits in ToS field of IP header.

Functions

func GetMgmtAddress 

func GetMgmtAddress(ovsRunDir, brName string) string

func GetTCPHeaderData 

func GetTCPHeaderData(ipPkt util.Message) (tcpSrcPort, tcpDstPort uint16, tcpSeqNum, tcpAckNum uint32, tcpFlags uint8, err error)

GetTCPHeaderData gets TCP header data from IP packet.

Types

type Action 

type Action interface {
	LoadARPOperation(value uint16) FlowBuilder
	LoadRegRange(regID int, value uint32, to Range) FlowBuilder
	LoadPktMarkRange(value uint32, to Range) FlowBuilder
	LoadIPDSCP(value uint8) 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
	Group(id GroupIDType) FlowBuilder
	Learn(id TableIDType, priority uint16, idleTimeout, hardTimeout uint16, cookieID uint64) LearnAction
	GotoTable(table TableIDType) FlowBuilder
	SendToController(reason uint8) FlowBuilder
	Note(notes string) FlowBuilder
	Meter(meterId uint32) FlowBuilder
}

type Bridge 

type Bridge interface {
	CreateTable(id, next TableIDType, missAction MissActionType) Table
	DeleteTable(id TableIDType) bool
	CreateGroup(id GroupIDType) Group
	DeleteGroup(id GroupIDType) bool
	CreateMeter(id MeterIDType, flags ofctrl.MeterFlag) Meter
	DeleteMeter(id MeterIDType) bool
	DeleteMeterAll() error
	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, error)
	// 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
	// AddOFEntriesInBundle syncs multiple Openflow entries(including Flow and Group) in a single transaction. This
	// operation could add new entries in "addEntries", modify entries in "modEntries", and remove entries in
	// "delEntries" in the same bundle.
	AddOFEntriesInBundle(addEntries []OFEntry, modEntries []OFEntry, delEntries []OFEntry) 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
	// SubscribePacketIn registers a consumer to listen to PacketIn messages matching the provided reason. When the
	// Bridge receives a PacketIn message with the specified reason, it sends the message to the consumer using the
	// provided channel.
	SubscribePacketIn(reason uint8, pktInQueue *PacketInQueue) error
	// AddTLVMap adds a TLV mapping with OVS field tun_metadataX. The value loaded in tun_metadataX is transported by
	// Geneve header with the specified <optClass, optType, optLength>. The value of OptLength must be a multiple of 4.
	// The value loaded into field tun_metadataX must fit within optLength bytes.
	AddTLVMap(optClass uint16, optType uint8, optLength uint8, tunMetadataIndex uint16) error
	// SendPacketOut sends a packetOut message to the OVS Bridge.
	SendPacketOut(packetOut *ofctrl.PacketOut) error
	// BuildPacketOut returns a new PacketOutBuilder.
	BuildPacketOut() PacketOutBuilder
}

Bridge defines operations on an openflow bridge.

func NewOFBridge 

func NewOFBridge(br string, mgmtAddr string) Bridge

type BucketBuilder 

type BucketBuilder interface {
	Weight(val uint16) BucketBuilder
	LoadReg(regID int, data uint32) BucketBuilder
	LoadXXReg(regID int, data []byte) BucketBuilder
	LoadRegRange(regID int, data uint32, rng Range) BucketBuilder
	ResubmitToTable(tableID TableIDType) BucketBuilder
	Done() Group
}

type CTAction 

type CTAction interface {
	LoadToMark(value uint32) CTAction
	LoadToLabelRange(value uint64, rng *Range) CTAction
	MoveToLabel(fromName string, fromRng, labelRng *Range) CTAction
	// NAT action translates the packet in the way that the connection was committed into the conntrack zone, e.g., if
	// a connection was committed with SNAT, the later packets would be translated with the earlier SNAT 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 EntryType 

type EntryType string
const (
	FlowEntry  EntryType = "FlowEntry"
	GroupEntry EntryType = "GroupEntry"
	MeterEntry EntryType = "MeterEntry"
)

type Flow 

type Flow interface {
	OFEntry
	// Returns the flow priority associated with OFEntry
	FlowPriority() uint16
	FlowProtocol() Protocol
	MatchString() string
	// CopyToBuilder returns a new FlowBuilder that copies the matches of the Flow.
	// It copies the original actions of the Flow only if copyActions is set to true, and
	// resets the priority in the new FlowBuilder if the provided priority is not 0.
	CopyToBuilder(priority uint16, copyActions bool) FlowBuilder
	IsDropFlow() bool
}

type FlowBuilder 

type FlowBuilder interface {
	MatchPriority(uint16) FlowBuilder
	MatchProtocol(name Protocol) FlowBuilder
	MatchIPProtocolValue(isIPv6 bool, protoValue uint8) FlowBuilder
	MatchReg(regID int, data uint32) FlowBuilder
	MatchXXReg(regID int, data []byte) 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
	MatchIPDSCP(dscp uint8) 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
	MatchCTStateDNAT(isSet bool) FlowBuilder
	MatchCTStateSNAT(isSet bool) FlowBuilder
	MatchCTMark(value uint32, mask *uint32) FlowBuilder
	MatchCTLabelRange(high, low uint64, bitRange Range) FlowBuilder
	MatchPktMark(value uint32, mask *uint32) FlowBuilder
	MatchConjID(value uint32) FlowBuilder
	MatchDstPort(port uint16, portMask *uint16) FlowBuilder
	MatchSrcPort(port uint16, portMask *uint16) FlowBuilder
	MatchICMPv6Type(icmp6Type byte) FlowBuilder
	MatchICMPv6Code(icmp6Code byte) FlowBuilder
	MatchTunnelDst(dstIP net.IP) FlowBuilder
	MatchTunMetadata(index int, data uint32) FlowBuilder
	// MatchCTSrcIP matches the source IPv4 address of the connection tracker original direction tuple.
	MatchCTSrcIP(ip net.IP) FlowBuilder
	// MatchCTSrcIPNet matches the source IPv4 address of the connection tracker original direction tuple with IP masking.
	MatchCTSrcIPNet(ipnet net.IPNet) FlowBuilder
	// MatchCTDstIP matches the destination IPv4 address of the connection tracker original direction tuple.
	MatchCTDstIP(ip net.IP) FlowBuilder
	// MatchCTDstIP matches the destination IPv4 address of the connection tracker original direction tuple with IP masking.
	MatchCTDstIPNet(ipNet net.IPNet) FlowBuilder
	// MatchCTSrcPort matches the transport source port of the connection tracker original direction tuple.
	MatchCTSrcPort(port uint16) FlowBuilder
	// MatchCTDstPort matches the transport destination port of the connection tracker original direction tuple.
	MatchCTDstPort(port uint16) FlowBuilder
	// MatchCTProtocol matches the IP protocol type of the connection tracker original direction tuple.
	MatchCTProtocol(proto Protocol) FlowBuilder
	Cookie(cookieID uint64) FlowBuilder
	SetHardTimeout(timout uint16) FlowBuilder
	SetIdleTimeout(timeout uint16) FlowBuilder
	Action() Action
	Done() Flow
}

type FlowStates 

type FlowStates struct {
	TableID         uint8
	PacketCount     uint64
	DurationNSecond uint32
}

type Group 

type Group interface {
	OFEntry
	ResetBuckets() Group
	Bucket() BucketBuilder
}

type GroupIDType 

type GroupIDType uint32

type IPRange 

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

type LearnAction 

type LearnAction interface {
	DeleteLearned() LearnAction
	MatchEthernetProtocolIP(isIPv6 bool) LearnAction
	MatchTransportDst(protocol Protocol) LearnAction
	MatchLearnedTCPDstPort() LearnAction
	MatchLearnedUDPDstPort() LearnAction
	MatchLearnedSCTPDstPort() LearnAction
	MatchLearnedTCPv6DstPort() LearnAction
	MatchLearnedUDPv6DstPort() LearnAction
	MatchLearnedSCTPv6DstPort() LearnAction
	MatchLearnedSrcIP() LearnAction
	MatchLearnedDstIP() LearnAction
	MatchLearnedSrcIPv6() LearnAction
	MatchLearnedDstIPv6() LearnAction
	MatchReg(regID int, data uint32, rng Range) LearnAction
	LoadReg(regID int, data uint32, rng Range) LearnAction
	LoadRegToReg(fromRegID, toRegID int, fromRng, toRng Range) LearnAction
	LoadXXRegToXXReg(fromRegID, toRegID int, fromRng, toRng Range) LearnAction
	SetDstMAC(mac net.HardwareAddr) LearnAction
	Done() FlowBuilder
}

type Meter added in v1.2.0 

type Meter interface {
	OFEntry
	ResetMeterBands() Meter
	MeterBand() MeterBandBuilder
}

type MeterBandBuilder added in v1.2.0 

type MeterBandBuilder interface {
	MeterType(meterType ofctrl.MeterType) MeterBandBuilder
	Rate(rate uint32) MeterBandBuilder
	Burst(burst uint32) MeterBandBuilder
	PrecLevel(precLevel uint8) MeterBandBuilder
	Experimenter(experimenter uint32) MeterBandBuilder
	Done() Meter
}

type MeterIDType added in v1.2.0 

type MeterIDType uint32

type MissActionType 

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

type OFBridge 

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 

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

func (*OFBridge) AddOFEntriesInBundle 

func (b *OFBridge) AddOFEntriesInBundle(addEntries []OFEntry, modEntries []OFEntry, delEntries []OFEntry) error

func (*OFBridge) AddTLVMap 

func (b *OFBridge) AddTLVMap(optClass uint16, optType uint8, optLength uint8, tunMetadataIndex uint16) error

func (*OFBridge) BuildPacketOut 

func (b *OFBridge) BuildPacketOut() PacketOutBuilder

func (*OFBridge) Connect 

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

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

func (*OFBridge) CreateGroup 

func (b *OFBridge) CreateGroup(id GroupIDType) Group

func (*OFBridge) CreateMeter added in v1.2.0 

func (b *OFBridge) CreateMeter(id MeterIDType, flags ofctrl.MeterFlag) Meter

func (*OFBridge) CreateTable 

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

func (*OFBridge) DeleteFlowsByCookie 

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

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

func (*OFBridge) DeleteGroup 

func (b *OFBridge) DeleteGroup(id GroupIDType) bool

func (*OFBridge) DeleteMeter added in v1.2.0 

func (b *OFBridge) DeleteMeter(id MeterIDType) bool

func (*OFBridge) DeleteMeterAll added in v1.2.0 

func (b *OFBridge) DeleteMeterAll() error

func (*OFBridge) DeleteTable 

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

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

func (*OFBridge) Disconnect 

func (b *OFBridge) Disconnect() error

Disconnect stops connection to the OFSwitch.

func (*OFBridge) DumpFlows 

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

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 

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

DumpTableStatus dumps table status from local cache.

func (*OFBridge) IsConnected 

func (b *OFBridge) IsConnected() bool

func (*OFBridge) MaxRetry 

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 

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 

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 

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) SendPacketOut 

func (b *OFBridge) SendPacketOut(packetOut *ofctrl.PacketOut) error

func (*OFBridge) SubscribePacketIn 

func (b *OFBridge) SubscribePacketIn(reason uint8, pktInQueue *PacketInQueue) error

func (*OFBridge) SwitchConnected 

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

SwitchConnected is a callback when the remote OFSwitch is connected.

func (*OFBridge) SwitchDisconnected 

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

type OFEntry 

type OFEntry interface {
	Add() error
	Modify() error
	Delete() error
	Type() EntryType
	KeyString() string
	// Reset ensures that the entry is "correct" and that the Add /
	// Modify / Delete methods can be called on this object. This method
	// should be called if a reconnection event happened.
	Reset()
	// GetBundleMessage returns ofctrl.OpenFlowModMessage which can be used in Bundle messages. operation specifies what
	// operation is expected to be taken on the OFEntry.
	GetBundleMessage(operation OFOperation) (ofctrl.OpenFlowModMessage, error)
}

type OFOperation 

type OFOperation int
const (
	AddMessage OFOperation = iota
	ModifyMessage
	DeleteMessage
)

type Packet 

type Packet struct {
	IsIPv6          bool
	DestinationMAC  net.HardwareAddr
	SourceMAC       net.HardwareAddr
	DestinationIP   net.IP
	SourceIP        net.IP
	IPLength        uint16
	IPProto         uint8
	IPFlags         uint16
	TTL             uint8
	DestinationPort uint16
	SourcePort      uint16
	TCPFlags        uint8
	ICMPType        uint8
	ICMPCode        uint8
	ICMPEchoID      uint16
	ICMPEchoSeq     uint16
}

func ParsePacketIn 

func ParsePacketIn(pktIn *ofctrl.PacketIn) (*Packet, error)

type PacketInQueue 

type PacketInQueue struct {
	// contains filtered or unexported fields
}

func NewPacketInQueue 

func NewPacketInQueue(size int, r rate.Limit) *PacketInQueue

func (*PacketInQueue) AddOrDrop 

func (q *PacketInQueue) AddOrDrop(packet *ofctrl.PacketIn) bool

func (*PacketInQueue) GetRateLimited 

func (q *PacketInQueue) GetRateLimited(stopCh <-chan struct{}) *ofctrl.PacketIn

type PacketOutBuilder 

type PacketOutBuilder interface {
	SetSrcMAC(mac net.HardwareAddr) PacketOutBuilder
	SetDstMAC(mac net.HardwareAddr) PacketOutBuilder
	SetSrcIP(ip net.IP) PacketOutBuilder
	SetDstIP(ip net.IP) PacketOutBuilder
	SetIPProtocol(protocol Protocol) PacketOutBuilder
	SetIPProtocolValue(isIPv6 bool, protoValue uint8) PacketOutBuilder
	SetTTL(ttl uint8) PacketOutBuilder
	SetIPFlags(flags uint16) PacketOutBuilder
	SetTCPSrcPort(port uint16) PacketOutBuilder
	SetTCPDstPort(port uint16) PacketOutBuilder
	SetTCPFlags(flags uint8) PacketOutBuilder
	SetTCPSeqNum(seqNum uint32) PacketOutBuilder
	SetTCPAckNum(ackNum uint32) PacketOutBuilder
	SetUDPSrcPort(port uint16) PacketOutBuilder
	SetUDPDstPort(port uint16) PacketOutBuilder
	SetICMPType(icmpType uint8) PacketOutBuilder
	SetICMPCode(icmpCode uint8) PacketOutBuilder
	SetICMPID(id uint16) PacketOutBuilder
	SetICMPSequence(seq uint16) PacketOutBuilder
	SetICMPData(data []byte) PacketOutBuilder
	SetInport(inPort uint32) PacketOutBuilder
	SetOutport(outport uint32) PacketOutBuilder
	AddLoadAction(name string, data uint64, rng Range) PacketOutBuilder
	Done() *ofctrl.PacketOut
}

type PortRange 

type PortRange struct {
	StartPort uint16
	EndPort   uint16
}

type Protocol 

type Protocol string
const (
	ProtocolIP     Protocol = "ip"
	ProtocolIPv6   Protocol = "ipv6"
	ProtocolARP    Protocol = "arp"
	ProtocolTCP    Protocol = "tcp"
	ProtocolTCPv6  Protocol = "tcpv6"
	ProtocolUDP    Protocol = "udp"
	ProtocolUDPv6  Protocol = "udpv6"
	ProtocolSCTP   Protocol = "sctp"
	ProtocolSCTPv6 Protocol = "sctpv6"
	ProtocolICMP   Protocol = "icmp"
	ProtocolICMPv6 Protocol = "icmpv6"
)

type Range 

type Range [2]uint32

func (*Range) Length 

func (r *Range) Length() uint32

func (*Range) ToNXRange 

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
	TableIDAll              = LastTableID
)

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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