linuxcalls

Documentation

Overview

Package linuxcalls contains wrappers over Netlink APIs related to Linux VETH interfaces or Linux interfaces in general.

Index

• type NetLinkHandler
  • func NewNetLinkHandler() *NetLinkHandler
  • func (h *NetLinkHandler) AddInterfaceIP(ifName string, addr *net.IPNet) error
  • func (h *NetLinkHandler) AddVethInterfacePair(ifName, peerIfName string) error
  • func (h *NetLinkHandler) DelInterfaceIP(ifName string, addr *net.IPNet) error
  • func (h *NetLinkHandler) DeleteInterface(ifName string) error
  • func (h *NetLinkHandler) GetAddressList(ifName string) ([]netlink.Addr, error)
  • func (h *NetLinkHandler) GetChecksumOffloading(ifName string) (rxOn, txOn bool, err error)
  • func (h *NetLinkHandler) GetInterfaceType(ifName string) (string, error)
  • func (h *NetLinkHandler) GetLinkByName(ifName string) (netlink.Link, error)
  • func (h *NetLinkHandler) GetLinkList() ([]netlink.Link, error)
  • func (h *NetLinkHandler) InterfaceExists(ifName string) (bool, error)
  • func (h *NetLinkHandler) IsInterfaceUp(ifName string) (bool, error)
  • func (h *NetLinkHandler) LinkSubscribe(ch chan<- netlink.LinkUpdate, done <-chan struct{}) error
  • func (h *NetLinkHandler) RenameInterface(ifName string, newName string) error
  • func (h *NetLinkHandler) SetChecksumOffloading(ifName string, rxOn, txOn bool) error
  • func (h *NetLinkHandler) SetInterfaceAlias(ifName, alias string) error
  • func (h *NetLinkHandler) SetInterfaceDown(ifName string) error
  • func (h *NetLinkHandler) SetInterfaceMTU(ifName string, mtu int) error
  • func (h *NetLinkHandler) SetInterfaceMac(ifName string, macAddress string) error
  • func (h *NetLinkHandler) SetInterfaceUp(ifName string) error
  • func (h *NetLinkHandler) SetLinkNamespace(link netlink.Link, ns netns.NsHandle) (err error)
• type NetlinkAPI
• type NetlinkAPIRead
• type NetlinkAPIWrite

Types

type NetLinkHandler

type NetLinkHandler struct {
}

NetLinkHandler is accessor for Netlink methods.

func NewNetLinkHandler

func NewNetLinkHandler() *NetLinkHandler

NewNetLinkHandler creates new instance of Netlink handler.

func (*NetLinkHandler) AddInterfaceIP

func (h *NetLinkHandler) AddInterfaceIP(ifName string, addr *net.IPNet) error

AddInterfaceIP calls AddrAdd Netlink API.

func (*NetLinkHandler) AddVethInterfacePair

func (h *NetLinkHandler) AddVethInterfacePair(ifName, peerIfName string) error

AddVethInterfacePair calls LinkAdd Netlink API for the Netlink.Veth interface type.

func (*NetLinkHandler) DelInterfaceIP

func (h *NetLinkHandler) DelInterfaceIP(ifName string, addr *net.IPNet) error

DelInterfaceIP calls AddrDel Netlink API.

func (*NetLinkHandler) DeleteInterface

func (h *NetLinkHandler) DeleteInterface(ifName string) error

DeleteInterface removes the given interface.

func (*NetLinkHandler) GetAddressList

func (h *NetLinkHandler) GetAddressList(ifName string) ([]netlink.Addr, error)

GetAddressList calls AddrList netlink API

func (*NetLinkHandler) GetChecksumOffloading

func (h *NetLinkHandler) GetChecksumOffloading(ifName string) (rxOn, txOn bool, err error)

GetChecksumOffloading returns the state of Rx/Tx checksum offloading for the given interface.

func (*NetLinkHandler) GetInterfaceType

func (h *NetLinkHandler) GetInterfaceType(ifName string) (string, error)

GetInterfaceType returns the type (string representation) of a given interface.

func (*NetLinkHandler) GetLinkByName

func (h *NetLinkHandler) GetLinkByName(ifName string) (netlink.Link, error)

GetLinkByName calls netlink API to get Link type from interface name

func (*NetLinkHandler) GetLinkList

func (h *NetLinkHandler) GetLinkList() ([]netlink.Link, error)

GetLinkList calls netlink API to get all Links in namespace

func (*NetLinkHandler) InterfaceExists

func (h *NetLinkHandler) InterfaceExists(ifName string) (bool, error)

InterfaceExists checks if interface with a given name exists.

func (*NetLinkHandler) IsInterfaceUp

func (h *NetLinkHandler) IsInterfaceUp(ifName string) (bool, error)

IsInterfaceUp checks if the interface is UP.

func (*NetLinkHandler) LinkSubscribe

func (h *NetLinkHandler) LinkSubscribe(ch chan<- netlink.LinkUpdate, done <-chan struct{}) error

LinkSubscribe takes a channel to which notifications will be sent when links change. Close the 'done' chan to stop subscription.

func (*NetLinkHandler) RenameInterface

func (h *NetLinkHandler) RenameInterface(ifName string, newName string) error

RenameInterface changes the name of the interface <ifName> to <newName>.

func (*NetLinkHandler) SetChecksumOffloading

func (h *NetLinkHandler) SetChecksumOffloading(ifName string, rxOn, txOn bool) error

SetChecksumOffloading enables/disables Rx/Tx checksum offloading for the given interface.

func (*NetLinkHandler) SetInterfaceAlias

func (h *NetLinkHandler) SetInterfaceAlias(ifName, alias string) error

SetInterfaceAlias sets the alias of the given interface. Equivalent to: `ip link set dev $ifName alias $alias`

func (*NetLinkHandler) SetInterfaceDown

func (h *NetLinkHandler) SetInterfaceDown(ifName string) error

SetInterfaceDown calls Netlink API LinkSetDown.

func (*NetLinkHandler) SetInterfaceMTU

func (h *NetLinkHandler) SetInterfaceMTU(ifName string, mtu int) error

SetInterfaceMTU calls LinkSetMTU Netlink API.

func (*NetLinkHandler) SetInterfaceMac

func (h *NetLinkHandler) SetInterfaceMac(ifName string, macAddress string) error

SetInterfaceMac calls LinkSetHardwareAddr netlink API.

func (*NetLinkHandler) SetInterfaceUp

func (h *NetLinkHandler) SetInterfaceUp(ifName string) error

SetInterfaceUp calls Netlink API LinkSetUp.

func (*NetLinkHandler) SetLinkNamespace

func (h *NetLinkHandler) SetLinkNamespace(link netlink.Link, ns netns.NsHandle) (err error)

SetLinkNamespace puts link into a network namespace.

type NetlinkAPI

type NetlinkAPI interface {
	NetlinkAPIWrite
	NetlinkAPIRead
}

NetlinkAPI interface covers all methods inside linux calls package needed to manage linux interfaces.

type NetlinkAPIRead

type NetlinkAPIRead interface {
	// GetLinkByName returns netlink interface type
	GetLinkByName(ifName string) (netlink.Link, error)
	// GetLinkList return all links from namespace
	GetLinkList() ([]netlink.Link, error)
	// LinkSubscribe takes a channel to which notifications will be sent
	// when links change. Close the 'done' chan to stop subscription.
	LinkSubscribe(ch chan<- netlink.LinkUpdate, done <-chan struct{}) error
	// GetAddressList reads all IP addresses
	GetAddressList(ifName string) ([]netlink.Addr, error)
	// InterfaceExists verifies interface existence
	InterfaceExists(ifName string) (bool, error)
	// IsInterfaceUp checks if the interface is UP.
	IsInterfaceUp(ifName string) (bool, error)
	// GetInterfaceType returns linux interface type
	GetInterfaceType(ifName string) (string, error)
	// GetChecksumOffloading returns the state of Rx/Tx checksum offloading
	// for the given interface.
	GetChecksumOffloading(ifName string) (rxOn, txOn bool, err error)
}

NetlinkAPIRead interface covers read methods inside linux calls package needed to manage linux interfaces.

type NetlinkAPIWrite

type NetlinkAPIWrite interface {
	// AddVethInterfacePair configures two connected VETH interfaces
	AddVethInterfacePair(ifName, peerIfName string) error
	// DeleteInterface removes the given interface.
	DeleteInterface(ifName string) error
	// SetInterfaceUp sets interface state to 'up'
	SetInterfaceUp(ifName string) error
	// SetInterfaceDown sets interface state to 'down'
	SetInterfaceDown(ifName string) error
	// AddInterfaceIP adds new IP address
	AddInterfaceIP(ifName string, addr *net.IPNet) error
	// DelInterfaceIP removes IP address from linux interface
	DelInterfaceIP(ifName string, addr *net.IPNet) error
	// SetInterfaceMac sets MAC address
	SetInterfaceMac(ifName string, macAddress string) error
	// SetInterfaceMTU set maximum transmission unit for interface
	SetInterfaceMTU(ifName string, mtu int) error
	// RenameInterface changes interface host name
	RenameInterface(ifName string, newName string) error
	// SetInterfaceAlias sets the alias of the given interface.
	// Equivalent to: `ip link set dev $ifName alias $alias`
	SetInterfaceAlias(ifName, alias string) error
	// SetLinkNamespace puts link into a network namespace.
	SetLinkNamespace(link netlink.Link, ns netns.NsHandle) error
	// SetChecksumOffloading enables/disables Rx/Tx checksum offloading
	// for the given interface.
	SetChecksumOffloading(ifName string, rxOn, txOn bool) error
}

NetlinkAPIWrite interface covers write methods inside linux calls package needed to manage linux interfaces.