Example #1
0
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
}
Example #2
0
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())
	}
}
Example #3
0
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))
}
Example #4
0
// 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 {
		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)
	}

	if base.Xdp != nil {
		addXdpAttrs(base.Xdp, req)
	}

	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 bond, ok := link.(*Bond); ok {
		addBondAttrs(bond, 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]))
		}
	} else if macv, ok := link.(*Macvtap); 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]))
		}
	} else if gretap, ok := link.(*Gretap); ok {
		addGretapAttrs(gretap, linkInfo)
	} else if iptun, ok := link.(*Iptun); ok {
		addIptunAttrs(iptun, linkInfo)
	} else if vti, ok := link.(*Vti); ok {
		addVtiAttrs(vti, linkInfo)
	}

	req.AddData(linkInfo)

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

	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
}
Example #5
0
// 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
}