9 "go.fd.io/govpp/binapi/ethernet_types"
10 "go.fd.io/govpp/binapi/interface_types"
11 "go.fd.io/govpp/binapi/ip_types"
15 MacAddress = ethernet_types.MacAddress
16 AddressWithPrefix = ip_types.AddressWithPrefix
17 IP4AddressWithPrefix = ip_types.IP4AddressWithPrefix
18 InterfaceIndex = interface_types.InterfaceIndex
27 NetConfigBase struct {
29 category string // what else to call this when `type` is reserved?
32 NetInterface interface {
35 AddressWithPrefix() AddressWithPrefix
36 IP4AddressWithPrefix() IP4AddressWithPrefix
37 IP4AddressString() string
38 SetIndex(InterfaceIndex)
39 Index() InterfaceIndex
40 HwAddress() MacAddress
43 NetInterfaceBase struct {
46 ip4address string // this will have form 10.10.10.1/24
51 NetworkInterfaceVeth struct {
53 peerNetworkNamespace string
58 NetworkInterfaceTap struct {
62 NetworkNamespace struct {
66 NetworkBridge struct {
68 networkNamespace string
74 NetNs string = "netns"
77 Bridge string = "bridge"
80 func (b *NetConfigBase) Name() string {
84 func (b *NetConfigBase) Type() string {
88 func (b *NetInterfaceBase) SetAddress(address string) {
89 b.ip4address = address
92 func (b *NetInterfaceBase) SetIndex(index InterfaceIndex) {
96 func (b *NetInterfaceBase) Index() InterfaceIndex {
100 func (b *NetInterfaceBase) AddressWithPrefix() AddressWithPrefix {
101 address, _ := ip_types.ParseAddressWithPrefix(b.ip4address)
105 func (b *NetInterfaceBase) IP4AddressWithPrefix() IP4AddressWithPrefix {
106 IP4Prefix, _ := ip_types.ParseIP4Prefix(b.ip4address)
107 IP4AddressWithPrefix := ip_types.IP4AddressWithPrefix(IP4Prefix)
108 return IP4AddressWithPrefix
111 func (b *NetInterfaceBase) IP4AddressString() string {
112 return strings.Split(b.ip4address, "/")[0]
115 func (b *NetInterfaceBase) HwAddress() MacAddress {
119 func (iface *NetworkInterfaceVeth) Configure() error {
120 err := AddVethPair(iface.name, iface.peerName)
125 if iface.peerNetworkNamespace != "" {
126 err := LinkSetNetns(iface.peerName, iface.peerNetworkNamespace)
132 if iface.peerIp4Address != "" {
133 err = AddAddress(iface.peerName, iface.peerIp4Address, iface.peerNetworkNamespace)
135 return fmt.Errorf("failed to add configure address for %s: %v", iface.peerName, err)
141 func NewVeth(cfg NetDevConfig, a *Addresser) (NetworkInterfaceVeth, error) {
142 var veth NetworkInterfaceVeth
145 veth.name = cfg["name"].(string)
146 veth.category = "veth"
148 if cfg["preset-hw-address"] != nil {
149 veth.hwAddress, err = ethernet_types.ParseMacAddress(cfg["preset-hw-address"].(string))
151 return NetworkInterfaceVeth{}, err
155 peer := cfg["peer"].(NetDevConfig)
157 veth.peerName = peer["name"].(string)
159 if peer["netns"] != nil {
160 veth.peerNetworkNamespace = peer["netns"].(string)
163 if peer["ip4"] != nil && peer["ip4"].(bool) == true {
164 veth.peerIp4Address, err = veth.addresser.
165 NewIp4AddressWithNamespace(veth.peerNetworkNamespace)
167 return NetworkInterfaceVeth{}, err
174 func (iface *NetworkInterfaceVeth) Unconfigure() {
178 func (iface *NetworkInterfaceVeth) PeerIp4AddressString() string {
179 return strings.Split(iface.peerIp4Address, "/")[0]
182 func NewTap(cfg NetDevConfig, a *Addresser) (NetworkInterfaceTap, error) {
183 var tap NetworkInterfaceTap
185 tap.name = cfg["name"].(string)
187 ip4Address, err := tap.addresser.NewIp4Address()
189 return NetworkInterfaceTap{}, err
191 tap.SetAddress(ip4Address)
195 func (iface *NetworkInterfaceTap) Configure() error {
196 err := AddTap(iface.name, iface.IP4AddressString())
203 func (iface *NetworkInterfaceTap) Unconfigure() {
207 func NewNetNamespace(cfg NetDevConfig) (NetworkNamespace, error) {
208 var networkNamespace NetworkNamespace
209 networkNamespace.name = cfg["name"].(string)
210 networkNamespace.category = "netns"
211 return networkNamespace, nil
214 func (ns *NetworkNamespace) Configure() error {
215 return addDelNetns(ns.name, true)
218 func (ns *NetworkNamespace) Unconfigure() {
219 addDelNetns(ns.name, false)
222 func NewBridge(cfg NetDevConfig) (NetworkBridge, error) {
223 var bridge NetworkBridge
224 bridge.name = cfg["name"].(string)
225 bridge.category = "bridge"
226 for _, v := range cfg["interfaces"].([]interface{}) {
227 bridge.interfaces = append(bridge.interfaces, v.(string))
229 bridge.networkNamespace = cfg["netns"].(string)
233 func (b *NetworkBridge) Configure() error {
234 return AddBridge(b.name, b.interfaces, b.networkNamespace)
237 func (b *NetworkBridge) Unconfigure() {
238 DelBridge(b.name, b.networkNamespace)
241 func DelBridge(brName, ns string) error {
242 err := SetDevDown(brName, ns)
247 err = addDelBridge(brName, ns, false)
255 func SetDevUp(dev, ns string) error {
256 return setDevUpDown(dev, ns, true)
259 func SetDevDown(dev, ns string) error {
260 return setDevUpDown(dev, ns, false)
263 func AddTap(ifName, ifAddress string) error {
264 cmd := exec.Command("ip", "tuntap", "add", ifName, "mode", "tap")
265 o, err := cmd.CombinedOutput()
267 s := fmt.Sprintf("error creating tap %s: %v: %s", ifName, err, string(o))
271 cmd = exec.Command("ip", "addr", "add", ifAddress, "dev", ifName)
275 s := fmt.Sprintf("error setting addr for tap %s: %v", ifName, err)
279 err = SetDevUp(ifName, "")
287 func DelLink(ifName string) {
288 cmd := exec.Command("ip", "link", "del", ifName)
292 func setDevUpDown(dev, ns string, isUp bool) error {
299 c := []string{"ip", "link", "set", "dev", dev, op}
300 cmd := appendNetns(c, ns)
303 s := fmt.Sprintf("error bringing %s device %s!", dev, op)
309 func AddVethPair(ifName, peerName string) error {
310 cmd := exec.Command("ip", "link", "add", ifName, "type", "veth", "peer", "name", peerName)
313 return fmt.Errorf("creating veth pair failed: %v", err)
315 err = SetDevUp(ifName, "")
317 return fmt.Errorf("set link up failed: %v", err)
322 func addDelNetns(name string, isAdd bool) error {
329 cmd := exec.Command("ip", "netns", op, name)
330 _, err := cmd.CombinedOutput()
332 return errors.New("add/del netns failed")
337 func AddNetns(nsName string) error {
338 return addDelNetns(nsName, true)
341 func DelNetns(nsName string) error {
342 return addDelNetns(nsName, false)
345 func LinkSetNetns(ifName, ns string) error {
346 cmd := exec.Command("ip", "link", "set", "dev", ifName, "up", "netns", ns)
349 return fmt.Errorf("error setting device '%s' to netns '%s: %v", ifName, ns, err)
354 func NewCommand(s []string, ns string) *exec.Cmd {
355 return appendNetns(s, ns)
358 func appendNetns(s []string, ns string) *exec.Cmd {
361 // use default namespace
362 cmd = exec.Command(s[0], s[1:]...)
364 var args = []string{"netns", "exec", ns}
365 args = append(args, s[:]...)
366 cmd = exec.Command("ip", args...)
371 func addDelBridge(brName, ns string, isAdd bool) error {
378 var c = []string{"brctl", op, brName}
379 cmd := appendNetns(c, ns)
382 s := fmt.Sprintf("%s %s failed!", op, brName)
388 func AddBridge(brName string, ifs []string, ns string) error {
389 err := addDelBridge(brName, ns, true)
394 for _, v := range ifs {
395 c := []string{"brctl", "addif", brName, v}
396 cmd := appendNetns(c, ns)
399 s := fmt.Sprintf("error adding %s to bridge %s: %v", v, brName, err)
403 err = SetDevUp(brName, ns)