847 lines
18 KiB
Go
847 lines
18 KiB
Go
package netlink
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import (
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"fmt"
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"net"
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"os"
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)
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// Link represents a link device from netlink. Shared link attributes
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// like name may be retrieved using the Attrs() method. Unique data
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// can be retrieved by casting the object to the proper type.
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type Link interface {
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Attrs() *LinkAttrs
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Type() string
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}
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type (
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NsPid int
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NsFd int
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)
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// LinkAttrs represents data shared by most link types
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type LinkAttrs struct {
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Index int
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MTU int
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TxQLen int // Transmit Queue Length
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Name string
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HardwareAddr net.HardwareAddr
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Flags net.Flags
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RawFlags uint32
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ParentIndex int // index of the parent link device
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MasterIndex int // must be the index of a bridge
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Namespace interface{} // nil | NsPid | NsFd
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Alias string
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Statistics *LinkStatistics
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Promisc int
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Xdp *LinkXdp
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EncapType string
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Protinfo *Protinfo
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OperState LinkOperState
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NetNsID int
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NumTxQueues int
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NumRxQueues int
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}
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// LinkOperState represents the values of the IFLA_OPERSTATE link
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// attribute, which contains the RFC2863 state of the interface.
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type LinkOperState uint8
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const (
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OperUnknown = iota // Status can't be determined.
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OperNotPresent // Some component is missing.
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OperDown // Down.
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OperLowerLayerDown // Down due to state of lower layer.
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OperTesting // In some test mode.
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OperDormant // Not up but pending an external event.
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OperUp // Up, ready to send packets.
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)
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func (s LinkOperState) String() string {
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switch s {
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case OperNotPresent:
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return "not-present"
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case OperDown:
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return "down"
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case OperLowerLayerDown:
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return "lower-layer-down"
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case OperTesting:
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return "testing"
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case OperDormant:
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return "dormant"
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case OperUp:
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return "up"
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default:
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return "unknown"
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}
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}
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// NewLinkAttrs returns LinkAttrs structure filled with default values
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func NewLinkAttrs() LinkAttrs {
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return LinkAttrs{
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TxQLen: -1,
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}
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}
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type LinkStatistics LinkStatistics64
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/*
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Ref: struct rtnl_link_stats {...}
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*/
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type LinkStatistics32 struct {
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RxPackets uint32
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TxPackets uint32
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RxBytes uint32
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TxBytes uint32
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RxErrors uint32
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TxErrors uint32
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RxDropped uint32
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TxDropped uint32
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Multicast uint32
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Collisions uint32
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RxLengthErrors uint32
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RxOverErrors uint32
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RxCrcErrors uint32
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RxFrameErrors uint32
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RxFifoErrors uint32
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RxMissedErrors uint32
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TxAbortedErrors uint32
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TxCarrierErrors uint32
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TxFifoErrors uint32
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TxHeartbeatErrors uint32
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TxWindowErrors uint32
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RxCompressed uint32
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TxCompressed uint32
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}
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func (s32 LinkStatistics32) to64() *LinkStatistics64 {
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return &LinkStatistics64{
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RxPackets: uint64(s32.RxPackets),
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TxPackets: uint64(s32.TxPackets),
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RxBytes: uint64(s32.RxBytes),
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TxBytes: uint64(s32.TxBytes),
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RxErrors: uint64(s32.RxErrors),
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TxErrors: uint64(s32.TxErrors),
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RxDropped: uint64(s32.RxDropped),
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TxDropped: uint64(s32.TxDropped),
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Multicast: uint64(s32.Multicast),
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Collisions: uint64(s32.Collisions),
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RxLengthErrors: uint64(s32.RxLengthErrors),
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RxOverErrors: uint64(s32.RxOverErrors),
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RxCrcErrors: uint64(s32.RxCrcErrors),
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RxFrameErrors: uint64(s32.RxFrameErrors),
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RxFifoErrors: uint64(s32.RxFifoErrors),
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RxMissedErrors: uint64(s32.RxMissedErrors),
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TxAbortedErrors: uint64(s32.TxAbortedErrors),
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TxCarrierErrors: uint64(s32.TxCarrierErrors),
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TxFifoErrors: uint64(s32.TxFifoErrors),
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TxHeartbeatErrors: uint64(s32.TxHeartbeatErrors),
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TxWindowErrors: uint64(s32.TxWindowErrors),
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RxCompressed: uint64(s32.RxCompressed),
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TxCompressed: uint64(s32.TxCompressed),
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}
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}
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/*
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Ref: struct rtnl_link_stats64 {...}
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*/
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type LinkStatistics64 struct {
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RxPackets uint64
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TxPackets uint64
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RxBytes uint64
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TxBytes uint64
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RxErrors uint64
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TxErrors uint64
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RxDropped uint64
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TxDropped uint64
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Multicast uint64
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Collisions uint64
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RxLengthErrors uint64
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RxOverErrors uint64
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RxCrcErrors uint64
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RxFrameErrors uint64
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RxFifoErrors uint64
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RxMissedErrors uint64
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TxAbortedErrors uint64
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TxCarrierErrors uint64
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TxFifoErrors uint64
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TxHeartbeatErrors uint64
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TxWindowErrors uint64
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RxCompressed uint64
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TxCompressed uint64
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}
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type LinkXdp struct {
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Fd int
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Attached bool
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Flags uint32
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ProgId uint32
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}
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// Device links cannot be created via netlink. These links
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// are links created by udev like 'lo' and 'etho0'
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type Device struct {
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LinkAttrs
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}
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func (device *Device) Attrs() *LinkAttrs {
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return &device.LinkAttrs
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}
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func (device *Device) Type() string {
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return "device"
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}
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// Dummy links are dummy ethernet devices
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type Dummy struct {
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LinkAttrs
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}
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func (dummy *Dummy) Attrs() *LinkAttrs {
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return &dummy.LinkAttrs
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}
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func (dummy *Dummy) Type() string {
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return "dummy"
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}
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// Ifb links are advanced dummy devices for packet filtering
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type Ifb struct {
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LinkAttrs
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}
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func (ifb *Ifb) Attrs() *LinkAttrs {
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return &ifb.LinkAttrs
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}
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func (ifb *Ifb) Type() string {
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return "ifb"
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}
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// Bridge links are simple linux bridges
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type Bridge struct {
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LinkAttrs
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MulticastSnooping *bool
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HelloTime *uint32
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}
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func (bridge *Bridge) Attrs() *LinkAttrs {
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return &bridge.LinkAttrs
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}
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func (bridge *Bridge) Type() string {
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return "bridge"
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}
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// Vlan links have ParentIndex set in their Attrs()
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type Vlan struct {
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LinkAttrs
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VlanId int
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}
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func (vlan *Vlan) Attrs() *LinkAttrs {
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return &vlan.LinkAttrs
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}
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func (vlan *Vlan) Type() string {
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return "vlan"
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}
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type MacvlanMode uint16
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const (
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MACVLAN_MODE_DEFAULT MacvlanMode = iota
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MACVLAN_MODE_PRIVATE
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MACVLAN_MODE_VEPA
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MACVLAN_MODE_BRIDGE
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MACVLAN_MODE_PASSTHRU
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MACVLAN_MODE_SOURCE
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)
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// Macvlan links have ParentIndex set in their Attrs()
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type Macvlan struct {
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LinkAttrs
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Mode MacvlanMode
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// MACAddrs is only populated for Macvlan SOURCE links
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MACAddrs []net.HardwareAddr
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}
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func (macvlan *Macvlan) Attrs() *LinkAttrs {
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return &macvlan.LinkAttrs
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}
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func (macvlan *Macvlan) Type() string {
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return "macvlan"
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}
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// Macvtap - macvtap is a virtual interfaces based on macvlan
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type Macvtap struct {
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Macvlan
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}
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func (macvtap Macvtap) Type() string {
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return "macvtap"
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}
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type TuntapMode uint16
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type TuntapFlag uint16
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// Tuntap links created via /dev/tun/tap, but can be destroyed via netlink
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type Tuntap struct {
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LinkAttrs
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Mode TuntapMode
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Flags TuntapFlag
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Queues int
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Fds []*os.File
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}
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func (tuntap *Tuntap) Attrs() *LinkAttrs {
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return &tuntap.LinkAttrs
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}
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func (tuntap *Tuntap) Type() string {
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return "tuntap"
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}
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// Veth devices must specify PeerName on create
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type Veth struct {
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LinkAttrs
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PeerName string // veth on create only
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}
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func (veth *Veth) Attrs() *LinkAttrs {
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return &veth.LinkAttrs
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}
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func (veth *Veth) Type() string {
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return "veth"
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}
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// GenericLink links represent types that are not currently understood
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// by this netlink library.
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type GenericLink struct {
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LinkAttrs
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LinkType string
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}
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func (generic *GenericLink) Attrs() *LinkAttrs {
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return &generic.LinkAttrs
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}
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func (generic *GenericLink) Type() string {
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return generic.LinkType
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}
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type Vxlan struct {
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LinkAttrs
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VxlanId int
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VtepDevIndex int
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SrcAddr net.IP
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Group net.IP
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TTL int
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TOS int
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Learning bool
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Proxy bool
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RSC bool
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L2miss bool
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L3miss bool
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UDPCSum bool
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UDP6ZeroCSumTx bool
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UDP6ZeroCSumRx bool
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NoAge bool
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GBP bool
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FlowBased bool
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Age int
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Limit int
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Port int
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PortLow int
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PortHigh int
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}
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func (vxlan *Vxlan) Attrs() *LinkAttrs {
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return &vxlan.LinkAttrs
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}
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func (vxlan *Vxlan) Type() string {
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return "vxlan"
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}
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type IPVlanMode uint16
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const (
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IPVLAN_MODE_L2 IPVlanMode = iota
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IPVLAN_MODE_L3
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IPVLAN_MODE_L3S
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IPVLAN_MODE_MAX
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)
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type IPVlan struct {
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LinkAttrs
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Mode IPVlanMode
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}
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func (ipvlan *IPVlan) Attrs() *LinkAttrs {
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return &ipvlan.LinkAttrs
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}
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func (ipvlan *IPVlan) Type() string {
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return "ipvlan"
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}
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// BondMode type
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type BondMode int
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func (b BondMode) String() string {
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s, ok := bondModeToString[b]
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if !ok {
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return fmt.Sprintf("BondMode(%d)", b)
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}
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return s
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}
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// StringToBondMode returns bond mode, or uknonw is the s is invalid.
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func StringToBondMode(s string) BondMode {
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mode, ok := StringToBondModeMap[s]
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if !ok {
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return BOND_MODE_UNKNOWN
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}
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return mode
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}
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// Possible BondMode
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const (
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BOND_MODE_BALANCE_RR BondMode = iota
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BOND_MODE_ACTIVE_BACKUP
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BOND_MODE_BALANCE_XOR
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BOND_MODE_BROADCAST
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BOND_MODE_802_3AD
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BOND_MODE_BALANCE_TLB
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BOND_MODE_BALANCE_ALB
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BOND_MODE_UNKNOWN
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)
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var bondModeToString = map[BondMode]string{
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BOND_MODE_BALANCE_RR: "balance-rr",
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BOND_MODE_ACTIVE_BACKUP: "active-backup",
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BOND_MODE_BALANCE_XOR: "balance-xor",
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BOND_MODE_BROADCAST: "broadcast",
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BOND_MODE_802_3AD: "802.3ad",
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BOND_MODE_BALANCE_TLB: "balance-tlb",
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BOND_MODE_BALANCE_ALB: "balance-alb",
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}
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var StringToBondModeMap = map[string]BondMode{
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"balance-rr": BOND_MODE_BALANCE_RR,
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"active-backup": BOND_MODE_ACTIVE_BACKUP,
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"balance-xor": BOND_MODE_BALANCE_XOR,
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"broadcast": BOND_MODE_BROADCAST,
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"802.3ad": BOND_MODE_802_3AD,
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"balance-tlb": BOND_MODE_BALANCE_TLB,
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"balance-alb": BOND_MODE_BALANCE_ALB,
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}
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// BondArpValidate type
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type BondArpValidate int
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// Possible BondArpValidate value
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const (
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BOND_ARP_VALIDATE_NONE BondArpValidate = iota
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BOND_ARP_VALIDATE_ACTIVE
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BOND_ARP_VALIDATE_BACKUP
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BOND_ARP_VALIDATE_ALL
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)
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// BondPrimaryReselect type
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type BondPrimaryReselect int
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// Possible BondPrimaryReselect value
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const (
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BOND_PRIMARY_RESELECT_ALWAYS BondPrimaryReselect = iota
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BOND_PRIMARY_RESELECT_BETTER
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BOND_PRIMARY_RESELECT_FAILURE
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)
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// BondArpAllTargets type
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type BondArpAllTargets int
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// Possible BondArpAllTargets value
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const (
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BOND_ARP_ALL_TARGETS_ANY BondArpAllTargets = iota
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BOND_ARP_ALL_TARGETS_ALL
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)
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// BondFailOverMac type
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type BondFailOverMac int
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// Possible BondFailOverMac value
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const (
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BOND_FAIL_OVER_MAC_NONE BondFailOverMac = iota
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BOND_FAIL_OVER_MAC_ACTIVE
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BOND_FAIL_OVER_MAC_FOLLOW
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)
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// BondXmitHashPolicy type
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type BondXmitHashPolicy int
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func (b BondXmitHashPolicy) String() string {
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s, ok := bondXmitHashPolicyToString[b]
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if !ok {
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return fmt.Sprintf("XmitHashPolicy(%d)", b)
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}
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return s
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}
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// StringToBondXmitHashPolicy returns bond lacp arte, or uknonw is the s is invalid.
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func StringToBondXmitHashPolicy(s string) BondXmitHashPolicy {
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lacp, ok := StringToBondXmitHashPolicyMap[s]
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if !ok {
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return BOND_XMIT_HASH_POLICY_UNKNOWN
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}
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return lacp
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}
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// Possible BondXmitHashPolicy value
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const (
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BOND_XMIT_HASH_POLICY_LAYER2 BondXmitHashPolicy = iota
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BOND_XMIT_HASH_POLICY_LAYER3_4
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BOND_XMIT_HASH_POLICY_LAYER2_3
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BOND_XMIT_HASH_POLICY_ENCAP2_3
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BOND_XMIT_HASH_POLICY_ENCAP3_4
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BOND_XMIT_HASH_POLICY_UNKNOWN
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)
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var bondXmitHashPolicyToString = map[BondXmitHashPolicy]string{
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BOND_XMIT_HASH_POLICY_LAYER2: "layer2",
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BOND_XMIT_HASH_POLICY_LAYER3_4: "layer3+4",
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BOND_XMIT_HASH_POLICY_LAYER2_3: "layer2+3",
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BOND_XMIT_HASH_POLICY_ENCAP2_3: "encap2+3",
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BOND_XMIT_HASH_POLICY_ENCAP3_4: "encap3+4",
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}
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var StringToBondXmitHashPolicyMap = map[string]BondXmitHashPolicy{
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"layer2": BOND_XMIT_HASH_POLICY_LAYER2,
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"layer3+4": BOND_XMIT_HASH_POLICY_LAYER3_4,
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"layer2+3": BOND_XMIT_HASH_POLICY_LAYER2_3,
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"encap2+3": BOND_XMIT_HASH_POLICY_ENCAP2_3,
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"encap3+4": BOND_XMIT_HASH_POLICY_ENCAP3_4,
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}
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// BondLacpRate type
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type BondLacpRate int
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func (b BondLacpRate) String() string {
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s, ok := bondLacpRateToString[b]
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if !ok {
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return fmt.Sprintf("LacpRate(%d)", b)
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}
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return s
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}
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// StringToBondLacpRate returns bond lacp arte, or uknonw is the s is invalid.
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func StringToBondLacpRate(s string) BondLacpRate {
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lacp, ok := StringToBondLacpRateMap[s]
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if !ok {
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return BOND_LACP_RATE_UNKNOWN
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}
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return lacp
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}
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// Possible BondLacpRate value
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const (
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BOND_LACP_RATE_SLOW BondLacpRate = iota
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BOND_LACP_RATE_FAST
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BOND_LACP_RATE_UNKNOWN
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)
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var bondLacpRateToString = map[BondLacpRate]string{
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BOND_LACP_RATE_SLOW: "slow",
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BOND_LACP_RATE_FAST: "fast",
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}
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var StringToBondLacpRateMap = map[string]BondLacpRate{
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"slow": BOND_LACP_RATE_SLOW,
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"fast": BOND_LACP_RATE_FAST,
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}
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// BondAdSelect type
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type BondAdSelect int
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// Possible BondAdSelect value
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const (
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BOND_AD_SELECT_STABLE BondAdSelect = iota
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|
BOND_AD_SELECT_BANDWIDTH
|
|
BOND_AD_SELECT_COUNT
|
|
)
|
|
|
|
// BondAdInfo represents ad info for bond
|
|
type BondAdInfo struct {
|
|
AggregatorId int
|
|
NumPorts int
|
|
ActorKey int
|
|
PartnerKey int
|
|
PartnerMac net.HardwareAddr
|
|
}
|
|
|
|
// Bond representation
|
|
type Bond struct {
|
|
LinkAttrs
|
|
Mode BondMode
|
|
ActiveSlave int
|
|
Miimon int
|
|
UpDelay int
|
|
DownDelay int
|
|
UseCarrier int
|
|
ArpInterval int
|
|
ArpIpTargets []net.IP
|
|
ArpValidate BondArpValidate
|
|
ArpAllTargets BondArpAllTargets
|
|
Primary int
|
|
PrimaryReselect BondPrimaryReselect
|
|
FailOverMac BondFailOverMac
|
|
XmitHashPolicy BondXmitHashPolicy
|
|
ResendIgmp int
|
|
NumPeerNotif int
|
|
AllSlavesActive int
|
|
MinLinks int
|
|
LpInterval int
|
|
PackersPerSlave int
|
|
LacpRate BondLacpRate
|
|
AdSelect BondAdSelect
|
|
// looking at iproute tool AdInfo can only be retrived. It can't be set.
|
|
AdInfo *BondAdInfo
|
|
AdActorSysPrio int
|
|
AdUserPortKey int
|
|
AdActorSystem net.HardwareAddr
|
|
TlbDynamicLb int
|
|
}
|
|
|
|
func NewLinkBond(atr LinkAttrs) *Bond {
|
|
return &Bond{
|
|
LinkAttrs: atr,
|
|
Mode: -1,
|
|
ActiveSlave: -1,
|
|
Miimon: -1,
|
|
UpDelay: -1,
|
|
DownDelay: -1,
|
|
UseCarrier: -1,
|
|
ArpInterval: -1,
|
|
ArpIpTargets: nil,
|
|
ArpValidate: -1,
|
|
ArpAllTargets: -1,
|
|
Primary: -1,
|
|
PrimaryReselect: -1,
|
|
FailOverMac: -1,
|
|
XmitHashPolicy: -1,
|
|
ResendIgmp: -1,
|
|
NumPeerNotif: -1,
|
|
AllSlavesActive: -1,
|
|
MinLinks: -1,
|
|
LpInterval: -1,
|
|
PackersPerSlave: -1,
|
|
LacpRate: -1,
|
|
AdSelect: -1,
|
|
AdActorSysPrio: -1,
|
|
AdUserPortKey: -1,
|
|
AdActorSystem: nil,
|
|
TlbDynamicLb: -1,
|
|
}
|
|
}
|
|
|
|
// Flag mask for bond options. Bond.Flagmask must be set to on for option to work.
|
|
const (
|
|
BOND_MODE_MASK uint64 = 1 << (1 + iota)
|
|
BOND_ACTIVE_SLAVE_MASK
|
|
BOND_MIIMON_MASK
|
|
BOND_UPDELAY_MASK
|
|
BOND_DOWNDELAY_MASK
|
|
BOND_USE_CARRIER_MASK
|
|
BOND_ARP_INTERVAL_MASK
|
|
BOND_ARP_VALIDATE_MASK
|
|
BOND_ARP_ALL_TARGETS_MASK
|
|
BOND_PRIMARY_MASK
|
|
BOND_PRIMARY_RESELECT_MASK
|
|
BOND_FAIL_OVER_MAC_MASK
|
|
BOND_XMIT_HASH_POLICY_MASK
|
|
BOND_RESEND_IGMP_MASK
|
|
BOND_NUM_PEER_NOTIF_MASK
|
|
BOND_ALL_SLAVES_ACTIVE_MASK
|
|
BOND_MIN_LINKS_MASK
|
|
BOND_LP_INTERVAL_MASK
|
|
BOND_PACKETS_PER_SLAVE_MASK
|
|
BOND_LACP_RATE_MASK
|
|
BOND_AD_SELECT_MASK
|
|
)
|
|
|
|
// Attrs implementation.
|
|
func (bond *Bond) Attrs() *LinkAttrs {
|
|
return &bond.LinkAttrs
|
|
}
|
|
|
|
// Type implementation fro Vxlan.
|
|
func (bond *Bond) Type() string {
|
|
return "bond"
|
|
}
|
|
|
|
// Gretap devices must specify LocalIP and RemoteIP on create
|
|
type Gretap struct {
|
|
LinkAttrs
|
|
IKey uint32
|
|
OKey uint32
|
|
EncapSport uint16
|
|
EncapDport uint16
|
|
Local net.IP
|
|
Remote net.IP
|
|
IFlags uint16
|
|
OFlags uint16
|
|
PMtuDisc uint8
|
|
Ttl uint8
|
|
Tos uint8
|
|
EncapType uint16
|
|
EncapFlags uint16
|
|
Link uint32
|
|
FlowBased bool
|
|
}
|
|
|
|
func (gretap *Gretap) Attrs() *LinkAttrs {
|
|
return &gretap.LinkAttrs
|
|
}
|
|
|
|
func (gretap *Gretap) Type() string {
|
|
if gretap.Local.To4() == nil {
|
|
return "ip6gretap"
|
|
}
|
|
return "gretap"
|
|
}
|
|
|
|
type Iptun struct {
|
|
LinkAttrs
|
|
Ttl uint8
|
|
Tos uint8
|
|
PMtuDisc uint8
|
|
Link uint32
|
|
Local net.IP
|
|
Remote net.IP
|
|
EncapSport uint16
|
|
EncapDport uint16
|
|
EncapType uint16
|
|
EncapFlags uint16
|
|
FlowBased bool
|
|
}
|
|
|
|
func (iptun *Iptun) Attrs() *LinkAttrs {
|
|
return &iptun.LinkAttrs
|
|
}
|
|
|
|
func (iptun *Iptun) Type() string {
|
|
return "ipip"
|
|
}
|
|
|
|
type Sittun struct {
|
|
LinkAttrs
|
|
Link uint32
|
|
Local net.IP
|
|
Remote net.IP
|
|
Ttl uint8
|
|
Tos uint8
|
|
PMtuDisc uint8
|
|
EncapType uint16
|
|
EncapFlags uint16
|
|
EncapSport uint16
|
|
EncapDport uint16
|
|
}
|
|
|
|
func (sittun *Sittun) Attrs() *LinkAttrs {
|
|
return &sittun.LinkAttrs
|
|
}
|
|
|
|
func (sittun *Sittun) Type() string {
|
|
return "sit"
|
|
}
|
|
|
|
type Vti struct {
|
|
LinkAttrs
|
|
IKey uint32
|
|
OKey uint32
|
|
Link uint32
|
|
Local net.IP
|
|
Remote net.IP
|
|
}
|
|
|
|
func (vti *Vti) Attrs() *LinkAttrs {
|
|
return &vti.LinkAttrs
|
|
}
|
|
|
|
func (iptun *Vti) Type() string {
|
|
return "vti"
|
|
}
|
|
|
|
type Gretun struct {
|
|
LinkAttrs
|
|
Link uint32
|
|
IFlags uint16
|
|
OFlags uint16
|
|
IKey uint32
|
|
OKey uint32
|
|
Local net.IP
|
|
Remote net.IP
|
|
Ttl uint8
|
|
Tos uint8
|
|
PMtuDisc uint8
|
|
EncapType uint16
|
|
EncapFlags uint16
|
|
EncapSport uint16
|
|
EncapDport uint16
|
|
}
|
|
|
|
func (gretun *Gretun) Attrs() *LinkAttrs {
|
|
return &gretun.LinkAttrs
|
|
}
|
|
|
|
func (gretun *Gretun) Type() string {
|
|
if gretun.Local.To4() == nil {
|
|
return "ip6gre"
|
|
}
|
|
return "gre"
|
|
}
|
|
|
|
type Vrf struct {
|
|
LinkAttrs
|
|
Table uint32
|
|
}
|
|
|
|
func (vrf *Vrf) Attrs() *LinkAttrs {
|
|
return &vrf.LinkAttrs
|
|
}
|
|
|
|
func (vrf *Vrf) Type() string {
|
|
return "vrf"
|
|
}
|
|
|
|
type GTP struct {
|
|
LinkAttrs
|
|
FD0 int
|
|
FD1 int
|
|
Role int
|
|
PDPHashsize int
|
|
}
|
|
|
|
func (gtp *GTP) Attrs() *LinkAttrs {
|
|
return >p.LinkAttrs
|
|
}
|
|
|
|
func (gtp *GTP) Type() string {
|
|
return "gtp"
|
|
}
|
|
|
|
// iproute2 supported devices;
|
|
// vlan | veth | vcan | dummy | ifb | macvlan | macvtap |
|
|
// bridge | bond | ipoib | ip6tnl | ipip | sit | vxlan |
|
|
// gre | gretap | ip6gre | ip6gretap | vti | nlmon |
|
|
// bond_slave | ipvlan
|
|
|
|
// LinkNotFoundError wraps the various not found errors when
|
|
// getting/reading links. This is intended for better error
|
|
// handling by dependent code so that "not found error" can
|
|
// be distinguished from other errors
|
|
type LinkNotFoundError struct {
|
|
error
|
|
}
|