tc

package
v0.4.29 Latest Latest
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This package is not in the latest version of its module.

 Go to latest Published: Jul 19, 2019 License: GPL-3.0 Imports: 4 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	Continue ConformExceed = iota
	Drop
	Shot
	Ok
	Pass
	Pipe

	// These values are stolen from linux kernel.
	EgressRedir   MirredActionType = 1
	EgressMirror                   = 2
	IngressRedir                   = 3
	IngressMirror                  = 4
)
View Source 
const (
	HandleNone    Handle = netlink.HANDLE_NONE
	HandleRoot           = netlink.HANDLE_ROOT
	HandleIngress        = netlink.HANDLE_INGRESS
)
View Source 
const (
	TCActionAdd = "add"
	TCActionDel = "del"
)

Variables

This section is empty.

Functions

func IFBClose 

func IFBClose() error

IFBClose unloads the Intermediate Functional Block device kernel module.

func IFBFlush 

func IFBFlush() error

IFBFlush completely reloads the Intermediate Functional Block device kernel module.

func IFBInit 

func IFBInit() error

IFBInit loads the Intermediate Functional Block device kernel module.

It is used in conjunction with HTB queueing discipline to allow for queueing incoming traffic for shaping instead of dropping.

Types

type Action 

type Action interface {
	// Kind returns this action's type.
	Kind() string
	// Cmd creates and returns "tc" sub-command using this filter action.
	Cmd() []string
}

type CMD 

type CMD interface {
	// Cmd creates and returns "tc" sub-command using this qdisc.
	Cmd() []string
}

CMD represents "tc" commands and sub-commands that can be described using "tc"

type Class 

type Class interface {
	// Kind returns this class's type.
	Kind() string
	// Attrs returns basic attributes of this filter.
	Attrs() ClassAttrs
	// Cmd creates and returns "tc" sub-command using this qdisc.
	Cmd() []string
}

type ClassAttrs 

type ClassAttrs struct {
	Link   netlink.Link
	Handle Handle
	Parent Handle
}

type CmdTC 

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

func (*CmdTC) ClassAdd 

func (m *CmdTC) ClassAdd(class Class) error

func (*CmdTC) ClassDel 

func (m *CmdTC) ClassDel(class Class) error

func (*CmdTC) Close 

func (m *CmdTC) Close() error

func (*CmdTC) FilterAdd 

func (m *CmdTC) FilterAdd(filter Filter) error

func (*CmdTC) FilterDel 

func (m *CmdTC) FilterDel(filter Filter) error

func (*CmdTC) QDiscAdd 

func (m *CmdTC) QDiscAdd(qdiscDesc QDisc) error

func (*CmdTC) QDiscDel 

func (m *CmdTC) QDiscDel(qdiscDesc QDisc) error

type ConformExceed 

type ConformExceed int32

func (ConformExceed) String 

func (m ConformExceed) String() string

type Filter 

type Filter interface {
	// Kind returns this filter's type.
	Kind() string
	// Attrs returns basic attributes of this filter.
	Attrs() FilterAttrs
	// Cmd creates and returns "tc" sub-command using this filter.
	Cmd() []string
}

type FilterAttrs 

type FilterAttrs struct {
	Link     netlink.Link
	Parent   Handle
	Priority uint16
	Protocol Protocol
}

Note that lower Priority means a higher priority.

type HTBClass 

type HTBClass struct {
	ClassAttrs
	Rate uint64
	Ceil uint64
}

func (*HTBClass) Attrs 

func (m *HTBClass) Attrs() ClassAttrs

func (*HTBClass) Cmd 

func (m *HTBClass) Cmd() []string

func (*HTBClass) Kind 

func (m *HTBClass) Kind() string

type HTBQDisc 

type HTBQDisc struct {
	QDiscAttrs
}

func (*HTBQDisc) Attrs 

func (m *HTBQDisc) Attrs() QDiscAttrs

func (*HTBQDisc) Cmd 

func (m *HTBQDisc) Cmd() []string

func (*HTBQDisc) Type 

func (m *HTBQDisc) Type() string

type Handle 

type Handle uint32

Handle specifies both qdisc, class and filter ID.

func NewHandle 

func NewHandle(major uint16, minor uint16) Handle

NewHandle computes tc handle based on major and minor parts.

func (Handle) String 

func (m Handle) String() string

func (Handle) UInt32 

func (m Handle) UInt32() uint32

UInt32 returns internal handle representation as an uint32.

func (Handle) WithMinor 

func (m Handle) WithMinor(minor uint16) Handle

type Ingress 

type Ingress struct {
	QDiscAttrs
}

func (*Ingress) Attrs 

func (m *Ingress) Attrs() QDiscAttrs

func (*Ingress) Cmd 

func (m *Ingress) Cmd() []string

func (*Ingress) Type 

func (m *Ingress) Type() string

type MirredAction 

type MirredAction struct {
	Dev    netlink.Link
	Action MirredActionType
}

MirredAction is the action that allows packet mirroring or redirecting the packet it receives.

func (*MirredAction) Cmd 

func (m *MirredAction) Cmd() []string

func (*MirredAction) Kind 

func (m *MirredAction) Kind() string

type MirredActionType 

type MirredActionType int

func (MirredActionType) String 

func (m MirredActionType) String() string

type PfifoQDisc 

type PfifoQDisc struct {
	QDiscAttrs
	// Limit constrains the queue size as measured in packets.
	Limit uint32
}

PfifoQDisc represents packet limited First In, First Out queue.

func (*PfifoQDisc) Attrs 

func (m *PfifoQDisc) Attrs() QDiscAttrs

func (*PfifoQDisc) Cmd 

func (m *PfifoQDisc) Cmd() []string

func (*PfifoQDisc) Type 

func (m *PfifoQDisc) Type() string

type PoliceAction 

type PoliceAction struct {
	// The maximum traffic rate of packets passing this action.
	Rate uint64
	// Set the maximum allowed burst in bytes.
	Burst uint64
	// This is the maximum packet size handled by the policer.
	MTU uint32
	// PeakRate sets the maximum bucket depletion rate, exceeding rate.
	PeakRate uint64
	// Overhead accounts for protocol overhead of encapsulating output devices
	// when computing rate and peakrate.
	Overhead uint64
	// Define how to handle packets which exceed or conform the configured
	// bandwidth limit.
	ConformExceed ConformExceed
}

func (*PoliceAction) Cmd 

func (m *PoliceAction) Cmd() []string

func (*PoliceAction) Kind 

func (m *PoliceAction) Kind() string

type Protocol 

type Protocol int
const (
	ProtoAll Protocol = unix.ETH_P_ALL
	ProtoIP           = unix.ETH_P_IP
)

func (Protocol) String 

func (m Protocol) String() string

type QDisc 

type QDisc interface {
	// Type returns this qdisc name, for example "tbf", "htb", etc.
	Type() string
	// Attrs returns basic attributes of this qdisc.
	Attrs() QDiscAttrs
	// Cmd creates and returns "tc" sub-command using this qdisc.
	Cmd() []string
}

QDisc describes traffic control queueing discipline.

type QDiscAttrs 

type QDiscAttrs struct {
	Link   netlink.Link
	Handle Handle
	Parent Handle
}

type TC 

type TC interface {
	QDiscAdd(qdisc QDisc) error
	QDiscDel(qdisc QDisc) error
	ClassAdd(class Class) error
	ClassDel(class Class) error
	FilterAdd(filter Filter) error
	FilterDel(filter Filter) error
	Close() error
}

func NewCmdTC 

func NewCmdTC() (TC, error)

func NewDefaultTC 

func NewDefaultTC() (TC, error)

type TFBQDisc 

type TFBQDisc struct {
	QDiscAttrs
	// Rate in bits per second.
	Rate uint64
	// Size of bucket in bytes.
	Burst uint64
	// Latency in microseconds.
	Latency uint32
}

func (*TFBQDisc) Attrs 

func (m *TFBQDisc) Attrs() QDiscAttrs

func (*TFBQDisc) Cmd 

func (m *TFBQDisc) Cmd() []string

func (*TFBQDisc) Type 

func (m *TFBQDisc) Type() string

type U32 

type U32 struct {
	FilterAttrs

	FlowID   Handle
	Selector U32Key
	Actions  []Action
}

U32 represents the Universal/Ugly 32bit filter classifier.

func (*U32) Attrs 

func (m *U32) Attrs() FilterAttrs

func (*U32) Cmd 

func (m *U32) Cmd() []string

func (*U32) Kind 

func (m *U32) Kind() string

type U32Key 

type U32Key struct {
	Val     uint32
	Mask    uint32
	Off     int
	OffMask int
}

Source Files

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