Golang nl.Uint32Attr函数代码示例

func fillService(s *Service) nl.NetlinkRequestData {
	cmdAttr := nl.NewRtAttr(ipvsCmdAttrService, nil)
	nl.NewRtAttrChild(cmdAttr, ipvsSvcAttrAddressFamily, nl.Uint16Attr(s.AddressFamily))
	if s.FWMark != 0 {
		nl.NewRtAttrChild(cmdAttr, ipvsSvcAttrFWMark, nl.Uint32Attr(s.FWMark))
	} else {
		nl.NewRtAttrChild(cmdAttr, ipvsSvcAttrProtocol, nl.Uint16Attr(s.Protocol))
		nl.NewRtAttrChild(cmdAttr, ipvsSvcAttrAddress, rawIPData(s.Address))

		// Port needs to be in network byte order.
		portBuf := new(bytes.Buffer)
		binary.Write(portBuf, binary.BigEndian, s.Port)
		nl.NewRtAttrChild(cmdAttr, ipvsSvcAttrPort, portBuf.Bytes())
	}

	nl.NewRtAttrChild(cmdAttr, ipvsSvcAttrSchedName, nl.ZeroTerminated(s.SchedName))
	if s.PEName != "" {
		nl.NewRtAttrChild(cmdAttr, ipvsSvcAttrPEName, nl.ZeroTerminated(s.PEName))
	}

	f := &ipvsFlags{
		flags: s.Flags,
		mask:  0xFFFFFFFF,
	}
	nl.NewRtAttrChild(cmdAttr, ipvsSvcAttrFlags, f.Serialize())
	nl.NewRtAttrChild(cmdAttr, ipvsSvcAttrTimeout, nl.Uint32Attr(s.Timeout))
	nl.NewRtAttrChild(cmdAttr, ipvsSvcAttrNetmask, nl.Uint32Attr(s.Netmask))
	return cmdAttr
}

func addVxlanAttrs(vxlan *Vxlan, linkInfo *nl.RtAttr) {
	data := nl.NewRtAttrChild(linkInfo, nl.IFLA_INFO_DATA, nil)
	nl.NewRtAttrChild(data, nl.IFLA_VXLAN_ID, nl.Uint32Attr(uint32(vxlan.VxlanId)))
	if vxlan.VtepDevIndex != 0 {
		nl.NewRtAttrChild(data, nl.IFLA_VXLAN_LINK, nl.Uint32Attr(uint32(vxlan.VtepDevIndex)))
	}
	if vxlan.SrcAddr != nil {
		ip := vxlan.SrcAddr.To4()
		if ip != nil {
			nl.NewRtAttrChild(data, nl.IFLA_VXLAN_LOCAL, []byte(ip))
		} else {
			ip = vxlan.SrcAddr.To16()
			if ip != nil {
				nl.NewRtAttrChild(data, nl.IFLA_VXLAN_LOCAL6, []byte(ip))
			}
		}
	}
	if vxlan.Group != nil {
		group := vxlan.Group.To4()
		if group != nil {
			nl.NewRtAttrChild(data, nl.IFLA_VXLAN_GROUP, []byte(group))
		} else {
			group = vxlan.Group.To16()
			if group != nil {
				nl.NewRtAttrChild(data, nl.IFLA_VXLAN_GROUP6, []byte(group))
			}
		}
	}

	nl.NewRtAttrChild(data, nl.IFLA_VXLAN_TTL, nl.Uint8Attr(uint8(vxlan.TTL)))
	nl.NewRtAttrChild(data, nl.IFLA_VXLAN_TOS, nl.Uint8Attr(uint8(vxlan.TOS)))
	nl.NewRtAttrChild(data, nl.IFLA_VXLAN_LEARNING, boolAttr(vxlan.Learning))
	nl.NewRtAttrChild(data, nl.IFLA_VXLAN_PROXY, boolAttr(vxlan.Proxy))
	nl.NewRtAttrChild(data, nl.IFLA_VXLAN_RSC, boolAttr(vxlan.RSC))
	nl.NewRtAttrChild(data, nl.IFLA_VXLAN_L2MISS, boolAttr(vxlan.L2miss))
	nl.NewRtAttrChild(data, nl.IFLA_VXLAN_L3MISS, boolAttr(vxlan.L3miss))

	if vxlan.NoAge {
		nl.NewRtAttrChild(data, nl.IFLA_VXLAN_AGEING, nl.Uint32Attr(0))
	} else if vxlan.Age > 0 {
		nl.NewRtAttrChild(data, nl.IFLA_VXLAN_AGEING, nl.Uint32Attr(uint32(vxlan.Age)))
	}
	if vxlan.Limit > 0 {
		nl.NewRtAttrChild(data, nl.IFLA_VXLAN_LIMIT, nl.Uint32Attr(uint32(vxlan.Limit)))
	}
	if vxlan.Port > 0 {
		nl.NewRtAttrChild(data, nl.IFLA_VXLAN_PORT, nl.Uint16Attr(uint16(vxlan.Port)))
	}
	if vxlan.PortLow > 0 || vxlan.PortHigh > 0 {
		pr := vxlanPortRange{uint16(vxlan.PortLow), uint16(vxlan.PortHigh)}

		buf := new(bytes.Buffer)
		binary.Write(buf, binary.BigEndian, &pr)

		nl.NewRtAttrChild(data, nl.IFLA_VXLAN_PORT_RANGE, buf.Bytes())
	}
}

func encodeActions(attr *nl.RtAttr, actions []Action) error {
	tabIndex := int(nl.TCA_ACT_TAB)

	for _, action := range actions {
		switch action := action.(type) {
		default:
			return fmt.Errorf("unknown action type %s", action.Type())
		case *MirredAction:
			table := nl.NewRtAttrChild(attr, tabIndex, nil)
			tabIndex++
			nl.NewRtAttrChild(table, nl.TCA_ACT_KIND, nl.ZeroTerminated("mirred"))
			aopts := nl.NewRtAttrChild(table, nl.TCA_ACT_OPTIONS, nil)
			nl.NewRtAttrChild(aopts, nl.TCA_MIRRED_PARMS, action.Serialize())
		case *BpfAction:
			table := nl.NewRtAttrChild(attr, tabIndex, nil)
			tabIndex++
			nl.NewRtAttrChild(table, nl.TCA_ACT_KIND, nl.ZeroTerminated("bpf"))
			aopts := nl.NewRtAttrChild(table, nl.TCA_ACT_OPTIONS, nil)
			nl.NewRtAttrChild(aopts, nl.TCA_ACT_BPF_PARMS, action.Serialize())
			nl.NewRtAttrChild(aopts, nl.TCA_ACT_BPF_FD, nl.Uint32Attr(uint32(action.Fd)))
			nl.NewRtAttrChild(aopts, nl.TCA_ACT_BPF_NAME, nl.ZeroTerminated(action.Name))
		}
	}
	return nil
}

func fillDestinaton(d *Destination) nl.NetlinkRequestData {
	cmdAttr := nl.NewRtAttr(ipvsCmdAttrDest, nil)

	nl.NewRtAttrChild(cmdAttr, ipvsDestAttrAddress, rawIPData(d.Address))
	// Port needs to be in network byte order.
	portBuf := new(bytes.Buffer)
	binary.Write(portBuf, binary.BigEndian, d.Port)
	nl.NewRtAttrChild(cmdAttr, ipvsDestAttrPort, portBuf.Bytes())

	nl.NewRtAttrChild(cmdAttr, ipvsDestAttrForwardingMethod, nl.Uint32Attr(d.ConnectionFlags&ConnectionFlagFwdMask))
	nl.NewRtAttrChild(cmdAttr, ipvsDestAttrWeight, nl.Uint32Attr(uint32(d.Weight)))
	nl.NewRtAttrChild(cmdAttr, ipvsDestAttrUpperThreshold, nl.Uint32Attr(d.UpperThreshold))
	nl.NewRtAttrChild(cmdAttr, ipvsDestAttrLowerThreshold, nl.Uint32Attr(d.LowerThreshold))

	return cmdAttr
}

// ensureBridgeTxQueueLen() ensures that the bridge interface's TX queue
// length is greater than zero.  Due to a CNI <= 0.3.0 'bridge' plugin bug,
// the bridge is initially created with a TX queue length of 0, which gets
// used as the packet limit for FIFO traffic shapers, which drops packets.
// TODO: remove when we can depend on a fixed CNI
func (plugin *kubenetNetworkPlugin) ensureBridgeTxQueueLen() {
	bridge, err := netlink.LinkByName(BridgeName)
	if err != nil {
		return
	}

	if bridge.Attrs().TxQLen > 0 {
		return
	}

	req := nl.NewNetlinkRequest(syscall.RTM_NEWLINK, syscall.NLM_F_ACK)
	msg := nl.NewIfInfomsg(syscall.AF_UNSPEC)
	req.AddData(msg)

	nameData := nl.NewRtAttr(syscall.IFLA_IFNAME, nl.ZeroTerminated(BridgeName))
	req.AddData(nameData)

	qlen := nl.NewRtAttr(syscall.IFLA_TXQLEN, nl.Uint32Attr(1000))
	req.AddData(qlen)

	_, err = req.Execute(syscall.NETLINK_ROUTE, 0)
	if err != nil {
		glog.V(5).Infof("Failed to set bridge tx queue length: %v", err)
	}
}

func addVtiAttrs(vti *Vti, linkInfo *nl.RtAttr) {
	data := nl.NewRtAttrChild(linkInfo, nl.IFLA_INFO_DATA, nil)

	ip := vti.Local.To4()
	if ip != nil {
		nl.NewRtAttrChild(data, nl.IFLA_VTI_LOCAL, []byte(ip))
	}

	ip = vti.Remote.To4()
	if ip != nil {
		nl.NewRtAttrChild(data, nl.IFLA_VTI_REMOTE, []byte(ip))
	}

	if vti.Link != 0 {
		nl.NewRtAttrChild(data, nl.IFLA_VTI_LINK, nl.Uint32Attr(vti.Link))
	}

	nl.NewRtAttrChild(data, nl.IFLA_VTI_IKEY, htonl(vti.IKey))
	nl.NewRtAttrChild(data, nl.IFLA_VTI_OKEY, htonl(vti.OKey))
}

func addIptunAttrs(iptun *Iptun, linkInfo *nl.RtAttr) {
	data := nl.NewRtAttrChild(linkInfo, nl.IFLA_INFO_DATA, nil)

	ip := iptun.Local.To4()
	if ip != nil {
		nl.NewRtAttrChild(data, nl.IFLA_IPTUN_LOCAL, []byte(ip))
	}

	ip = iptun.Remote.To4()
	if ip != nil {
		nl.NewRtAttrChild(data, nl.IFLA_IPTUN_REMOTE, []byte(ip))
	}

	if iptun.Link != 0 {
		nl.NewRtAttrChild(data, nl.IFLA_IPTUN_LINK, nl.Uint32Attr(iptun.Link))
	}
	nl.NewRtAttrChild(data, nl.IFLA_IPTUN_PMTUDISC, nl.Uint8Attr(iptun.PMtuDisc))
	nl.NewRtAttrChild(data, nl.IFLA_IPTUN_TTL, nl.Uint8Attr(iptun.Ttl))
	nl.NewRtAttrChild(data, nl.IFLA_IPTUN_TOS, nl.Uint8Attr(iptun.Tos))
}

func encodeActions(attr *nl.RtAttr, actions []Action) error {
	tabIndex := int(nl.TCA_ACT_TAB)

	for _, action := range actions {
		switch action := action.(type) {
		default:
			return fmt.Errorf("unknown action type %s", action.Type())
		case *MirredAction:
			table := nl.NewRtAttrChild(attr, tabIndex, nil)
			tabIndex++
			nl.NewRtAttrChild(table, nl.TCA_ACT_KIND, nl.ZeroTerminated("mirred"))
			aopts := nl.NewRtAttrChild(table, nl.TCA_ACT_OPTIONS, nil)
			mirred := nl.TcMirred{
				Eaction: int32(action.MirredAction),
				Ifindex: uint32(action.Ifindex),
			}
			toTcGen(action.Attrs(), &mirred.TcGen)
			nl.NewRtAttrChild(aopts, nl.TCA_MIRRED_PARMS, mirred.Serialize())
		case *BpfAction:
			table := nl.NewRtAttrChild(attr, tabIndex, nil)
			tabIndex++
			nl.NewRtAttrChild(table, nl.TCA_ACT_KIND, nl.ZeroTerminated("bpf"))
			aopts := nl.NewRtAttrChild(table, nl.TCA_ACT_OPTIONS, nil)
			gen := nl.TcGen{}
			toTcGen(action.Attrs(), &gen)
			nl.NewRtAttrChild(aopts, nl.TCA_ACT_BPF_PARMS, gen.Serialize())
			nl.NewRtAttrChild(aopts, nl.TCA_ACT_BPF_FD, nl.Uint32Attr(uint32(action.Fd)))
			nl.NewRtAttrChild(aopts, nl.TCA_ACT_BPF_NAME, nl.ZeroTerminated(action.Name))
		case *GenericAction:
			table := nl.NewRtAttrChild(attr, tabIndex, nil)
			tabIndex++
			nl.NewRtAttrChild(table, nl.TCA_ACT_KIND, nl.ZeroTerminated("gact"))
			aopts := nl.NewRtAttrChild(table, nl.TCA_ACT_OPTIONS, nil)
			gen := nl.TcGen{}
			toTcGen(action.Attrs(), &gen)
			nl.NewRtAttrChild(aopts, nl.TCA_GACT_PARMS, gen.Serialize())
		}
	}
	return nil
}

func addGretapAttrs(gretap *Gretap, linkInfo *nl.RtAttr) {
	data := nl.NewRtAttrChild(linkInfo, nl.IFLA_INFO_DATA, nil)

	ip := gretap.Local.To4()
	if ip != nil {
		nl.NewRtAttrChild(data, nl.IFLA_GRE_LOCAL, []byte(ip))
	}
	ip = gretap.Remote.To4()
	if ip != nil {
		nl.NewRtAttrChild(data, nl.IFLA_GRE_REMOTE, []byte(ip))
	}

	if gretap.IKey != 0 {
		nl.NewRtAttrChild(data, nl.IFLA_GRE_IKEY, htonl(gretap.IKey))
		gretap.IFlags |= uint16(nl.GRE_KEY)
	}

	if gretap.OKey != 0 {
		nl.NewRtAttrChild(data, nl.IFLA_GRE_OKEY, htonl(gretap.OKey))
		gretap.OFlags |= uint16(nl.GRE_KEY)
	}

	nl.NewRtAttrChild(data, nl.IFLA_GRE_IFLAGS, htons(gretap.IFlags))
	nl.NewRtAttrChild(data, nl.IFLA_GRE_OFLAGS, htons(gretap.OFlags))

	if gretap.Link != 0 {
		nl.NewRtAttrChild(data, nl.IFLA_GRE_LINK, nl.Uint32Attr(gretap.Link))
	}

	nl.NewRtAttrChild(data, nl.IFLA_GRE_PMTUDISC, nl.Uint8Attr(gretap.PMtuDisc))
	nl.NewRtAttrChild(data, nl.IFLA_GRE_TTL, nl.Uint8Attr(gretap.Ttl))
	nl.NewRtAttrChild(data, nl.IFLA_GRE_TOS, nl.Uint8Attr(gretap.Tos))
	nl.NewRtAttrChild(data, nl.IFLA_GRE_ENCAP_TYPE, nl.Uint16Attr(gretap.EncapType))
	nl.NewRtAttrChild(data, nl.IFLA_GRE_ENCAP_FLAGS, nl.Uint16Attr(gretap.EncapFlags))
	nl.NewRtAttrChild(data, nl.IFLA_GRE_ENCAP_SPORT, htons(gretap.EncapSport))
	nl.NewRtAttrChild(data, nl.IFLA_GRE_ENCAP_DPORT, htons(gretap.EncapDport))
}

// LinkAdd adds a new link device. The type and features of the device
// are taken fromt the parameters in the link object.
// Equivalent to: `ip link add $link`
func (h *Handle) LinkAdd(link Link) error {
	// TODO: set mtu and hardware address
	// TODO: support extra data for macvlan
	base := link.Attrs()

	if base.Name == "" {
		return fmt.Errorf("LinkAttrs.Name cannot be empty!")
	}

	if tuntap, ok := link.(*Tuntap); ok {
		// TODO: support user
		// TODO: support group
		// TODO: multi_queue
		// TODO: support non- persistent
		if tuntap.Mode < syscall.IFF_TUN || tuntap.Mode > syscall.IFF_TAP {
			return fmt.Errorf("Tuntap.Mode %v unknown!", tuntap.Mode)
		}
		file, err := os.OpenFile("/dev/net/tun", os.O_RDWR, 0)
		if err != nil {
			return err
		}
		defer file.Close()
		var req ifReq
		if tuntap.Flags == 0 {
			req.Flags = uint16(TUNTAP_DEFAULTS)
		} else {
			req.Flags = uint16(tuntap.Flags)
		}
		req.Flags |= uint16(tuntap.Mode)
		copy(req.Name[:15], base.Name)
		_, _, errno := syscall.Syscall(syscall.SYS_IOCTL, file.Fd(), uintptr(syscall.TUNSETIFF), uintptr(unsafe.Pointer(&req)))
		if errno != 0 {
			return fmt.Errorf("Tuntap IOCTL TUNSETIFF failed, errno %v", errno)
		}
		_, _, errno = syscall.Syscall(syscall.SYS_IOCTL, file.Fd(), uintptr(syscall.TUNSETPERSIST), 1)
		if errno != 0 {
			return fmt.Errorf("Tuntap IOCTL TUNSETPERSIST failed, errno %v", errno)
		}
		h.ensureIndex(base)

		// can't set master during create, so set it afterwards
		if base.MasterIndex != 0 {
			// TODO: verify MasterIndex is actually a bridge?
			return h.LinkSetMasterByIndex(link, base.MasterIndex)
		}
		return nil
	}

	req := h.newNetlinkRequest(syscall.RTM_NEWLINK, syscall.NLM_F_CREATE|syscall.NLM_F_EXCL|syscall.NLM_F_ACK)

	msg := nl.NewIfInfomsg(syscall.AF_UNSPEC)
	// TODO: make it shorter
	if base.Flags&net.FlagUp != 0 {
		msg.Change = syscall.IFF_UP
		msg.Flags = syscall.IFF_UP
	}
	if base.Flags&net.FlagBroadcast != 0 {
		msg.Change |= syscall.IFF_BROADCAST
		msg.Flags |= syscall.IFF_BROADCAST
	}
	if base.Flags&net.FlagLoopback != 0 {
		msg.Change |= syscall.IFF_LOOPBACK
		msg.Flags |= syscall.IFF_LOOPBACK
	}
	if base.Flags&net.FlagPointToPoint != 0 {
		msg.Change |= syscall.IFF_POINTOPOINT
		msg.Flags |= syscall.IFF_POINTOPOINT
	}
	if base.Flags&net.FlagMulticast != 0 {
		msg.Change |= syscall.IFF_MULTICAST
		msg.Flags |= syscall.IFF_MULTICAST
	}
	req.AddData(msg)

	if base.ParentIndex != 0 {
		b := make([]byte, 4)
		native.PutUint32(b, uint32(base.ParentIndex))
		data := nl.NewRtAttr(syscall.IFLA_LINK, b)
		req.AddData(data)
	} else if link.Type() == "ipvlan" {
		return fmt.Errorf("Can't create ipvlan link without ParentIndex")
	}

	nameData := nl.NewRtAttr(syscall.IFLA_IFNAME, nl.ZeroTerminated(base.Name))
	req.AddData(nameData)

	if base.MTU > 0 {
		mtu := nl.NewRtAttr(syscall.IFLA_MTU, nl.Uint32Attr(uint32(base.MTU)))
		req.AddData(mtu)
	}

	if base.TxQLen >= 0 {
		qlen := nl.NewRtAttr(syscall.IFLA_TXQLEN, nl.Uint32Attr(uint32(base.TxQLen)))
		req.AddData(qlen)
	}

	if base.Namespace != nil {
//.........这里部分代码省略.........

func addBondAttrs(bond *Bond, linkInfo *nl.RtAttr) {
	data := nl.NewRtAttrChild(linkInfo, nl.IFLA_INFO_DATA, nil)
	if bond.Mode >= 0 {
		nl.NewRtAttrChild(data, nl.IFLA_BOND_MODE, nl.Uint8Attr(uint8(bond.Mode)))
	}
	if bond.ActiveSlave >= 0 {
		nl.NewRtAttrChild(data, nl.IFLA_BOND_ACTIVE_SLAVE, nl.Uint32Attr(uint32(bond.ActiveSlave)))
	}
	if bond.Miimon >= 0 {
		nl.NewRtAttrChild(data, nl.IFLA_BOND_MIIMON, nl.Uint32Attr(uint32(bond.Miimon)))
	}
	if bond.UpDelay >= 0 {
		nl.NewRtAttrChild(data, nl.IFLA_BOND_UPDELAY, nl.Uint32Attr(uint32(bond.UpDelay)))
	}
	if bond.DownDelay >= 0 {
		nl.NewRtAttrChild(data, nl.IFLA_BOND_DOWNDELAY, nl.Uint32Attr(uint32(bond.DownDelay)))
	}
	if bond.UseCarrier >= 0 {
		nl.NewRtAttrChild(data, nl.IFLA_BOND_USE_CARRIER, nl.Uint8Attr(uint8(bond.UseCarrier)))
	}
	if bond.ArpInterval >= 0 {
		nl.NewRtAttrChild(data, nl.IFLA_BOND_ARP_INTERVAL, nl.Uint32Attr(uint32(bond.ArpInterval)))
	}
	if bond.ArpIpTargets != nil {
		msg := nl.NewRtAttrChild(data, nl.IFLA_BOND_ARP_IP_TARGET, nil)
		for i := range bond.ArpIpTargets {
			ip := bond.ArpIpTargets[i].To4()
			if ip != nil {
				nl.NewRtAttrChild(msg, i, []byte(ip))
				continue
			}
			ip = bond.ArpIpTargets[i].To16()
			if ip != nil {
				nl.NewRtAttrChild(msg, i, []byte(ip))
			}
		}
	}
	if bond.ArpValidate >= 0 {
		nl.NewRtAttrChild(data, nl.IFLA_BOND_ARP_VALIDATE, nl.Uint32Attr(uint32(bond.ArpValidate)))
	}
	if bond.ArpAllTargets >= 0 {
		nl.NewRtAttrChild(data, nl.IFLA_BOND_ARP_ALL_TARGETS, nl.Uint32Attr(uint32(bond.ArpAllTargets)))
	}
	if bond.Primary >= 0 {
		nl.NewRtAttrChild(data, nl.IFLA_BOND_PRIMARY, nl.Uint32Attr(uint32(bond.Primary)))
	}
	if bond.PrimaryReselect >= 0 {
		nl.NewRtAttrChild(data, nl.IFLA_BOND_PRIMARY_RESELECT, nl.Uint8Attr(uint8(bond.PrimaryReselect)))
	}
	if bond.FailOverMac >= 0 {
		nl.NewRtAttrChild(data, nl.IFLA_BOND_FAIL_OVER_MAC, nl.Uint8Attr(uint8(bond.FailOverMac)))
	}
	if bond.XmitHashPolicy >= 0 {
		nl.NewRtAttrChild(data, nl.IFLA_BOND_XMIT_HASH_POLICY, nl.Uint8Attr(uint8(bond.XmitHashPolicy)))
	}
	if bond.ResendIgmp >= 0 {
		nl.NewRtAttrChild(data, nl.IFLA_BOND_RESEND_IGMP, nl.Uint32Attr(uint32(bond.ResendIgmp)))
	}
	if bond.NumPeerNotif >= 0 {
		nl.NewRtAttrChild(data, nl.IFLA_BOND_NUM_PEER_NOTIF, nl.Uint8Attr(uint8(bond.NumPeerNotif)))
	}
	if bond.AllSlavesActive >= 0 {
		nl.NewRtAttrChild(data, nl.IFLA_BOND_ALL_SLAVES_ACTIVE, nl.Uint8Attr(uint8(bond.AllSlavesActive)))
	}
	if bond.MinLinks >= 0 {
		nl.NewRtAttrChild(data, nl.IFLA_BOND_MIN_LINKS, nl.Uint32Attr(uint32(bond.MinLinks)))
	}
	if bond.LpInterval >= 0 {
		nl.NewRtAttrChild(data, nl.IFLA_BOND_LP_INTERVAL, nl.Uint32Attr(uint32(bond.LpInterval)))
	}
	if bond.PackersPerSlave >= 0 {
		nl.NewRtAttrChild(data, nl.IFLA_BOND_PACKETS_PER_SLAVE, nl.Uint32Attr(uint32(bond.PackersPerSlave)))
	}
	if bond.LacpRate >= 0 {
		nl.NewRtAttrChild(data, nl.IFLA_BOND_AD_LACP_RATE, nl.Uint8Attr(uint8(bond.LacpRate)))
	}
	if bond.AdSelect >= 0 {
		nl.NewRtAttrChild(data, nl.IFLA_BOND_AD_SELECT, nl.Uint8Attr(uint8(bond.AdSelect)))
	}
}

// FilterAdd will add a filter to the system.
// Equivalent to: `tc filter add $filter`
func FilterAdd(filter Filter) error {
	native = nl.NativeEndian()
	req := nl.NewNetlinkRequest(syscall.RTM_NEWTFILTER, syscall.NLM_F_CREATE|syscall.NLM_F_EXCL|syscall.NLM_F_ACK)
	base := filter.Attrs()
	msg := &nl.TcMsg{
		Family:  nl.FAMILY_ALL,
		Ifindex: int32(base.LinkIndex),
		Handle:  base.Handle,
		Parent:  base.Parent,
		Info:    MakeHandle(base.Priority, nl.Swap16(base.Protocol)),
	}
	req.AddData(msg)
	req.AddData(nl.NewRtAttr(nl.TCA_KIND, nl.ZeroTerminated(filter.Type())))

	options := nl.NewRtAttr(nl.TCA_OPTIONS, nil)
	if u32, ok := filter.(*U32); ok {
		// match all
		sel := nl.TcU32Sel{
			Nkeys: 1,
			Flags: nl.TC_U32_TERMINAL,
		}
		sel.Keys = append(sel.Keys, nl.TcU32Key{})
		nl.NewRtAttrChild(options, nl.TCA_U32_SEL, sel.Serialize())
		if u32.ClassId != 0 {
			nl.NewRtAttrChild(options, nl.TCA_U32_CLASSID, nl.Uint32Attr(u32.ClassId))
		}
		actionsAttr := nl.NewRtAttrChild(options, nl.TCA_U32_ACT, nil)
		// backwards compatibility
		if u32.RedirIndex != 0 {
			u32.Actions = append([]Action{NewMirredAction(u32.RedirIndex)}, u32.Actions...)
		}
		if err := encodeActions(actionsAttr, u32.Actions); err != nil {
			return err
		}
	} else if fw, ok := filter.(*Fw); ok {
		if fw.Mask != 0 {
			b := make([]byte, 4)
			native.PutUint32(b, fw.Mask)
			nl.NewRtAttrChild(options, nl.TCA_FW_MASK, b)
		}
		if fw.InDev != "" {
			nl.NewRtAttrChild(options, nl.TCA_FW_INDEV, nl.ZeroTerminated(fw.InDev))
		}
		if (fw.Police != nl.TcPolice{}) {

			police := nl.NewRtAttrChild(options, nl.TCA_FW_POLICE, nil)
			nl.NewRtAttrChild(police, nl.TCA_POLICE_TBF, fw.Police.Serialize())
			if (fw.Police.Rate != nl.TcRateSpec{}) {
				payload := SerializeRtab(fw.Rtab)
				nl.NewRtAttrChild(police, nl.TCA_POLICE_RATE, payload)
			}
			if (fw.Police.PeakRate != nl.TcRateSpec{}) {
				payload := SerializeRtab(fw.Ptab)
				nl.NewRtAttrChild(police, nl.TCA_POLICE_PEAKRATE, payload)
			}
		}
		if fw.ClassId != 0 {
			b := make([]byte, 4)
			native.PutUint32(b, fw.ClassId)
			nl.NewRtAttrChild(options, nl.TCA_FW_CLASSID, b)
		}
	} else if bpf, ok := filter.(*BpfFilter); ok {
		var bpf_flags uint32
		if bpf.ClassId != 0 {
			nl.NewRtAttrChild(options, nl.TCA_BPF_CLASSID, nl.Uint32Attr(bpf.ClassId))
		}
		if bpf.Fd >= 0 {
			nl.NewRtAttrChild(options, nl.TCA_BPF_FD, nl.Uint32Attr((uint32(bpf.Fd))))
		}
		if bpf.Name != "" {
			nl.NewRtAttrChild(options, nl.TCA_BPF_NAME, nl.ZeroTerminated(bpf.Name))
		}
		if bpf.DirectAction {
			bpf_flags |= nl.TCA_BPF_FLAG_ACT_DIRECT
		}
		nl.NewRtAttrChild(options, nl.TCA_BPF_FLAGS, nl.Uint32Attr(bpf_flags))
	}

	req.AddData(options)
	_, err := req.Execute(syscall.NETLINK_ROUTE, 0)
	return err
}

// LinkAdd adds a new link device. The type and features of the device
// are taken fromt the parameters in the link object.
// Equivalent to: `ip link add $link`
func LinkAdd(link Link) error {
	// TODO: set mtu and hardware address
	// TODO: support extra data for macvlan
	base := link.Attrs()

	if base.Name == "" {
		return fmt.Errorf("LinkAttrs.Name cannot be empty!")
	}

	req := nl.NewNetlinkRequest(syscall.RTM_NEWLINK, syscall.NLM_F_CREATE|syscall.NLM_F_EXCL|syscall.NLM_F_ACK)

	msg := nl.NewIfInfomsg(syscall.AF_UNSPEC)
	req.AddData(msg)

	if base.ParentIndex != 0 {
		b := make([]byte, 4)
		native.PutUint32(b, uint32(base.ParentIndex))
		data := nl.NewRtAttr(syscall.IFLA_LINK, b)
		req.AddData(data)
	} else if link.Type() == "ipvlan" {
		return fmt.Errorf("Can't create ipvlan link without ParentIndex")
	}

	nameData := nl.NewRtAttr(syscall.IFLA_IFNAME, nl.ZeroTerminated(base.Name))
	req.AddData(nameData)

	if base.MTU > 0 {
		mtu := nl.NewRtAttr(syscall.IFLA_MTU, nl.Uint32Attr(uint32(base.MTU)))
		req.AddData(mtu)
	}

	if base.TxQLen >= 0 {
		qlen := nl.NewRtAttr(syscall.IFLA_TXQLEN, nl.Uint32Attr(uint32(base.TxQLen)))
		req.AddData(qlen)
	}

	if base.Namespace != nil {
		var attr *nl.RtAttr
		switch base.Namespace.(type) {
		case NsPid:
			val := nl.Uint32Attr(uint32(base.Namespace.(NsPid)))
			attr = nl.NewRtAttr(syscall.IFLA_NET_NS_PID, val)
		case NsFd:
			val := nl.Uint32Attr(uint32(base.Namespace.(NsFd)))
			attr = nl.NewRtAttr(nl.IFLA_NET_NS_FD, val)
		}

		req.AddData(attr)
	}

	linkInfo := nl.NewRtAttr(syscall.IFLA_LINKINFO, nil)
	nl.NewRtAttrChild(linkInfo, nl.IFLA_INFO_KIND, nl.NonZeroTerminated(link.Type()))

	if vlan, ok := link.(*Vlan); ok {
		b := make([]byte, 2)
		native.PutUint16(b, uint16(vlan.VlanId))
		data := nl.NewRtAttrChild(linkInfo, nl.IFLA_INFO_DATA, nil)
		nl.NewRtAttrChild(data, nl.IFLA_VLAN_ID, b)
	} else if veth, ok := link.(*Veth); ok {
		data := nl.NewRtAttrChild(linkInfo, nl.IFLA_INFO_DATA, nil)
		peer := nl.NewRtAttrChild(data, nl.VETH_INFO_PEER, nil)
		nl.NewIfInfomsgChild(peer, syscall.AF_UNSPEC)
		nl.NewRtAttrChild(peer, syscall.IFLA_IFNAME, nl.ZeroTerminated(veth.PeerName))
		if base.TxQLen >= 0 {
			nl.NewRtAttrChild(peer, syscall.IFLA_TXQLEN, nl.Uint32Attr(uint32(base.TxQLen)))
		}
		if base.MTU > 0 {
			nl.NewRtAttrChild(peer, syscall.IFLA_MTU, nl.Uint32Attr(uint32(base.MTU)))
		}

	} else if vxlan, ok := link.(*Vxlan); ok {
		addVxlanAttrs(vxlan, linkInfo)
	} else if ipv, ok := link.(*IPVlan); ok {
		data := nl.NewRtAttrChild(linkInfo, nl.IFLA_INFO_DATA, nil)
		nl.NewRtAttrChild(data, nl.IFLA_IPVLAN_MODE, nl.Uint16Attr(uint16(ipv.Mode)))
	} else if macv, ok := link.(*Macvlan); ok {
		if macv.Mode != MACVLAN_MODE_DEFAULT {
			data := nl.NewRtAttrChild(linkInfo, nl.IFLA_INFO_DATA, nil)
			nl.NewRtAttrChild(data, nl.IFLA_MACVLAN_MODE, nl.Uint32Attr(macvlanModes[macv.Mode]))
		}
	}

	req.AddData(linkInfo)

	_, err := req.Execute(syscall.NETLINK_ROUTE, 0)
	if err != nil {
		return err
	}

	ensureIndex(base)

	// can't set master during create, so set it afterwards
	if base.MasterIndex != 0 {
		// TODO: verify MasterIndex is actually a bridge?
		return LinkSetMasterByIndex(link, base.MasterIndex)
	}
	return nil
//.........这里部分代码省略.........