link_linux.go 72 KB

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  1. package netlink
  2. import (
  3. "bytes"
  4. "encoding/binary"
  5. "fmt"
  6. "net"
  7. "os"
  8. "strings"
  9. "syscall"
  10. "unsafe"
  11. "github.com/vishvananda/netlink/nl"
  12. "github.com/vishvananda/netns"
  13. "golang.org/x/sys/unix"
  14. )
  15. const (
  16. SizeofLinkStats32 = 0x5c
  17. SizeofLinkStats64 = 0xd8
  18. )
  19. const (
  20. TUNTAP_MODE_TUN TuntapMode = unix.IFF_TUN
  21. TUNTAP_MODE_TAP TuntapMode = unix.IFF_TAP
  22. TUNTAP_DEFAULTS TuntapFlag = unix.IFF_TUN_EXCL | unix.IFF_ONE_QUEUE
  23. TUNTAP_VNET_HDR TuntapFlag = unix.IFF_VNET_HDR
  24. TUNTAP_TUN_EXCL TuntapFlag = unix.IFF_TUN_EXCL
  25. TUNTAP_NO_PI TuntapFlag = unix.IFF_NO_PI
  26. TUNTAP_ONE_QUEUE TuntapFlag = unix.IFF_ONE_QUEUE
  27. TUNTAP_MULTI_QUEUE TuntapFlag = unix.IFF_MULTI_QUEUE
  28. TUNTAP_MULTI_QUEUE_DEFAULTS TuntapFlag = TUNTAP_MULTI_QUEUE | TUNTAP_NO_PI
  29. )
  30. var lookupByDump = false
  31. var macvlanModes = [...]uint32{
  32. 0,
  33. nl.MACVLAN_MODE_PRIVATE,
  34. nl.MACVLAN_MODE_VEPA,
  35. nl.MACVLAN_MODE_BRIDGE,
  36. nl.MACVLAN_MODE_PASSTHRU,
  37. nl.MACVLAN_MODE_SOURCE,
  38. }
  39. func ensureIndex(link *LinkAttrs) {
  40. if link != nil && link.Index == 0 {
  41. newlink, _ := LinkByName(link.Name)
  42. if newlink != nil {
  43. link.Index = newlink.Attrs().Index
  44. }
  45. }
  46. }
  47. func (h *Handle) ensureIndex(link *LinkAttrs) {
  48. if link != nil && link.Index == 0 {
  49. newlink, _ := h.LinkByName(link.Name)
  50. if newlink != nil {
  51. link.Index = newlink.Attrs().Index
  52. }
  53. }
  54. }
  55. func (h *Handle) LinkSetARPOff(link Link) error {
  56. base := link.Attrs()
  57. h.ensureIndex(base)
  58. req := h.newNetlinkRequest(unix.RTM_SETLINK, unix.NLM_F_ACK)
  59. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  60. msg.Change |= unix.IFF_NOARP
  61. msg.Flags |= unix.IFF_NOARP
  62. msg.Index = int32(base.Index)
  63. req.AddData(msg)
  64. _, err := req.Execute(unix.NETLINK_ROUTE, 0)
  65. return err
  66. }
  67. func LinkSetARPOff(link Link) error {
  68. return pkgHandle.LinkSetARPOff(link)
  69. }
  70. func (h *Handle) LinkSetARPOn(link Link) error {
  71. base := link.Attrs()
  72. h.ensureIndex(base)
  73. req := h.newNetlinkRequest(unix.RTM_SETLINK, unix.NLM_F_ACK)
  74. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  75. msg.Change |= unix.IFF_NOARP
  76. msg.Flags &= ^uint32(unix.IFF_NOARP)
  77. msg.Index = int32(base.Index)
  78. req.AddData(msg)
  79. _, err := req.Execute(unix.NETLINK_ROUTE, 0)
  80. return err
  81. }
  82. func LinkSetARPOn(link Link) error {
  83. return pkgHandle.LinkSetARPOn(link)
  84. }
  85. func (h *Handle) SetPromiscOn(link Link) error {
  86. base := link.Attrs()
  87. h.ensureIndex(base)
  88. req := h.newNetlinkRequest(unix.RTM_SETLINK, unix.NLM_F_ACK)
  89. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  90. msg.Change = unix.IFF_PROMISC
  91. msg.Flags = unix.IFF_PROMISC
  92. msg.Index = int32(base.Index)
  93. req.AddData(msg)
  94. _, err := req.Execute(unix.NETLINK_ROUTE, 0)
  95. return err
  96. }
  97. // LinkSetAllmulticastOn enables the reception of all hardware multicast packets for the link device.
  98. // Equivalent to: `ip link set $link allmulticast on`
  99. func LinkSetAllmulticastOn(link Link) error {
  100. return pkgHandle.LinkSetAllmulticastOn(link)
  101. }
  102. // LinkSetAllmulticastOn enables the reception of all hardware multicast packets for the link device.
  103. // Equivalent to: `ip link set $link allmulticast on`
  104. func (h *Handle) LinkSetAllmulticastOn(link Link) error {
  105. base := link.Attrs()
  106. h.ensureIndex(base)
  107. req := h.newNetlinkRequest(unix.RTM_NEWLINK, unix.NLM_F_ACK)
  108. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  109. msg.Change = unix.IFF_ALLMULTI
  110. msg.Flags = unix.IFF_ALLMULTI
  111. msg.Index = int32(base.Index)
  112. req.AddData(msg)
  113. _, err := req.Execute(unix.NETLINK_ROUTE, 0)
  114. return err
  115. }
  116. // LinkSetAllmulticastOff disables the reception of all hardware multicast packets for the link device.
  117. // Equivalent to: `ip link set $link allmulticast off`
  118. func LinkSetAllmulticastOff(link Link) error {
  119. return pkgHandle.LinkSetAllmulticastOff(link)
  120. }
  121. // LinkSetAllmulticastOff disables the reception of all hardware multicast packets for the link device.
  122. // Equivalent to: `ip link set $link allmulticast off`
  123. func (h *Handle) LinkSetAllmulticastOff(link Link) error {
  124. base := link.Attrs()
  125. h.ensureIndex(base)
  126. req := h.newNetlinkRequest(unix.RTM_NEWLINK, unix.NLM_F_ACK)
  127. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  128. msg.Change = unix.IFF_ALLMULTI
  129. msg.Index = int32(base.Index)
  130. req.AddData(msg)
  131. _, err := req.Execute(unix.NETLINK_ROUTE, 0)
  132. return err
  133. }
  134. func MacvlanMACAddrAdd(link Link, addr net.HardwareAddr) error {
  135. return pkgHandle.MacvlanMACAddrAdd(link, addr)
  136. }
  137. func (h *Handle) MacvlanMACAddrAdd(link Link, addr net.HardwareAddr) error {
  138. return h.macvlanMACAddrChange(link, []net.HardwareAddr{addr}, nl.MACVLAN_MACADDR_ADD)
  139. }
  140. func MacvlanMACAddrDel(link Link, addr net.HardwareAddr) error {
  141. return pkgHandle.MacvlanMACAddrDel(link, addr)
  142. }
  143. func (h *Handle) MacvlanMACAddrDel(link Link, addr net.HardwareAddr) error {
  144. return h.macvlanMACAddrChange(link, []net.HardwareAddr{addr}, nl.MACVLAN_MACADDR_DEL)
  145. }
  146. func MacvlanMACAddrFlush(link Link) error {
  147. return pkgHandle.MacvlanMACAddrFlush(link)
  148. }
  149. func (h *Handle) MacvlanMACAddrFlush(link Link) error {
  150. return h.macvlanMACAddrChange(link, nil, nl.MACVLAN_MACADDR_FLUSH)
  151. }
  152. func MacvlanMACAddrSet(link Link, addrs []net.HardwareAddr) error {
  153. return pkgHandle.MacvlanMACAddrSet(link, addrs)
  154. }
  155. func (h *Handle) MacvlanMACAddrSet(link Link, addrs []net.HardwareAddr) error {
  156. return h.macvlanMACAddrChange(link, addrs, nl.MACVLAN_MACADDR_SET)
  157. }
  158. func (h *Handle) macvlanMACAddrChange(link Link, addrs []net.HardwareAddr, mode uint32) error {
  159. base := link.Attrs()
  160. h.ensureIndex(base)
  161. req := h.newNetlinkRequest(unix.RTM_NEWLINK, unix.NLM_F_ACK)
  162. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  163. msg.Index = int32(base.Index)
  164. req.AddData(msg)
  165. linkInfo := nl.NewRtAttr(unix.IFLA_LINKINFO, nil)
  166. linkInfo.AddRtAttr(nl.IFLA_INFO_KIND, nl.NonZeroTerminated(link.Type()))
  167. inner := linkInfo.AddRtAttr(nl.IFLA_INFO_DATA, nil)
  168. // IFLA_MACVLAN_MACADDR_MODE = mode
  169. b := make([]byte, 4)
  170. native.PutUint32(b, mode)
  171. inner.AddRtAttr(nl.IFLA_MACVLAN_MACADDR_MODE, b)
  172. // populate message with MAC addrs, if necessary
  173. switch mode {
  174. case nl.MACVLAN_MACADDR_ADD, nl.MACVLAN_MACADDR_DEL:
  175. if len(addrs) == 1 {
  176. inner.AddRtAttr(nl.IFLA_MACVLAN_MACADDR, []byte(addrs[0]))
  177. }
  178. case nl.MACVLAN_MACADDR_SET:
  179. mad := inner.AddRtAttr(nl.IFLA_MACVLAN_MACADDR_DATA, nil)
  180. for _, addr := range addrs {
  181. mad.AddRtAttr(nl.IFLA_MACVLAN_MACADDR, []byte(addr))
  182. }
  183. }
  184. req.AddData(linkInfo)
  185. _, err := req.Execute(unix.NETLINK_ROUTE, 0)
  186. return err
  187. }
  188. func BridgeSetMcastSnoop(link Link, on bool) error {
  189. return pkgHandle.BridgeSetMcastSnoop(link, on)
  190. }
  191. func (h *Handle) BridgeSetMcastSnoop(link Link, on bool) error {
  192. bridge := link.(*Bridge)
  193. bridge.MulticastSnooping = &on
  194. return h.linkModify(bridge, unix.NLM_F_ACK)
  195. }
  196. func SetPromiscOn(link Link) error {
  197. return pkgHandle.SetPromiscOn(link)
  198. }
  199. func (h *Handle) SetPromiscOff(link Link) error {
  200. base := link.Attrs()
  201. h.ensureIndex(base)
  202. req := h.newNetlinkRequest(unix.RTM_SETLINK, unix.NLM_F_ACK)
  203. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  204. msg.Change = unix.IFF_PROMISC
  205. msg.Index = int32(base.Index)
  206. req.AddData(msg)
  207. _, err := req.Execute(unix.NETLINK_ROUTE, 0)
  208. return err
  209. }
  210. func SetPromiscOff(link Link) error {
  211. return pkgHandle.SetPromiscOff(link)
  212. }
  213. // LinkSetUp enables the link device.
  214. // Equivalent to: `ip link set $link up`
  215. func LinkSetUp(link Link) error {
  216. return pkgHandle.LinkSetUp(link)
  217. }
  218. // LinkSetUp enables the link device.
  219. // Equivalent to: `ip link set $link up`
  220. func (h *Handle) LinkSetUp(link Link) error {
  221. base := link.Attrs()
  222. h.ensureIndex(base)
  223. req := h.newNetlinkRequest(unix.RTM_NEWLINK, unix.NLM_F_ACK)
  224. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  225. msg.Change = unix.IFF_UP
  226. msg.Flags = unix.IFF_UP
  227. msg.Index = int32(base.Index)
  228. req.AddData(msg)
  229. _, err := req.Execute(unix.NETLINK_ROUTE, 0)
  230. return err
  231. }
  232. // LinkSetDown disables link device.
  233. // Equivalent to: `ip link set $link down`
  234. func LinkSetDown(link Link) error {
  235. return pkgHandle.LinkSetDown(link)
  236. }
  237. // LinkSetDown disables link device.
  238. // Equivalent to: `ip link set $link down`
  239. func (h *Handle) LinkSetDown(link Link) error {
  240. base := link.Attrs()
  241. h.ensureIndex(base)
  242. req := h.newNetlinkRequest(unix.RTM_NEWLINK, unix.NLM_F_ACK)
  243. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  244. msg.Change = unix.IFF_UP
  245. msg.Index = int32(base.Index)
  246. req.AddData(msg)
  247. _, err := req.Execute(unix.NETLINK_ROUTE, 0)
  248. return err
  249. }
  250. // LinkSetMTU sets the mtu of the link device.
  251. // Equivalent to: `ip link set $link mtu $mtu`
  252. func LinkSetMTU(link Link, mtu int) error {
  253. return pkgHandle.LinkSetMTU(link, mtu)
  254. }
  255. // LinkSetMTU sets the mtu of the link device.
  256. // Equivalent to: `ip link set $link mtu $mtu`
  257. func (h *Handle) LinkSetMTU(link Link, mtu int) error {
  258. base := link.Attrs()
  259. h.ensureIndex(base)
  260. req := h.newNetlinkRequest(unix.RTM_SETLINK, unix.NLM_F_ACK)
  261. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  262. msg.Index = int32(base.Index)
  263. req.AddData(msg)
  264. b := make([]byte, 4)
  265. native.PutUint32(b, uint32(mtu))
  266. data := nl.NewRtAttr(unix.IFLA_MTU, b)
  267. req.AddData(data)
  268. _, err := req.Execute(unix.NETLINK_ROUTE, 0)
  269. return err
  270. }
  271. // LinkSetName sets the name of the link device.
  272. // Equivalent to: `ip link set $link name $name`
  273. func LinkSetName(link Link, name string) error {
  274. return pkgHandle.LinkSetName(link, name)
  275. }
  276. // LinkSetName sets the name of the link device.
  277. // Equivalent to: `ip link set $link name $name`
  278. func (h *Handle) LinkSetName(link Link, name string) error {
  279. base := link.Attrs()
  280. h.ensureIndex(base)
  281. req := h.newNetlinkRequest(unix.RTM_SETLINK, unix.NLM_F_ACK)
  282. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  283. msg.Index = int32(base.Index)
  284. req.AddData(msg)
  285. data := nl.NewRtAttr(unix.IFLA_IFNAME, []byte(name))
  286. req.AddData(data)
  287. _, err := req.Execute(unix.NETLINK_ROUTE, 0)
  288. return err
  289. }
  290. // LinkSetAlias sets the alias of the link device.
  291. // Equivalent to: `ip link set dev $link alias $name`
  292. func LinkSetAlias(link Link, name string) error {
  293. return pkgHandle.LinkSetAlias(link, name)
  294. }
  295. // LinkSetAlias sets the alias of the link device.
  296. // Equivalent to: `ip link set dev $link alias $name`
  297. func (h *Handle) LinkSetAlias(link Link, name string) error {
  298. base := link.Attrs()
  299. h.ensureIndex(base)
  300. req := h.newNetlinkRequest(unix.RTM_SETLINK, unix.NLM_F_ACK)
  301. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  302. msg.Index = int32(base.Index)
  303. req.AddData(msg)
  304. data := nl.NewRtAttr(unix.IFLA_IFALIAS, []byte(name))
  305. req.AddData(data)
  306. _, err := req.Execute(unix.NETLINK_ROUTE, 0)
  307. return err
  308. }
  309. // LinkSetHardwareAddr sets the hardware address of the link device.
  310. // Equivalent to: `ip link set $link address $hwaddr`
  311. func LinkSetHardwareAddr(link Link, hwaddr net.HardwareAddr) error {
  312. return pkgHandle.LinkSetHardwareAddr(link, hwaddr)
  313. }
  314. // LinkSetHardwareAddr sets the hardware address of the link device.
  315. // Equivalent to: `ip link set $link address $hwaddr`
  316. func (h *Handle) LinkSetHardwareAddr(link Link, hwaddr net.HardwareAddr) error {
  317. base := link.Attrs()
  318. h.ensureIndex(base)
  319. req := h.newNetlinkRequest(unix.RTM_SETLINK, unix.NLM_F_ACK)
  320. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  321. msg.Index = int32(base.Index)
  322. req.AddData(msg)
  323. data := nl.NewRtAttr(unix.IFLA_ADDRESS, []byte(hwaddr))
  324. req.AddData(data)
  325. _, err := req.Execute(unix.NETLINK_ROUTE, 0)
  326. return err
  327. }
  328. // LinkSetVfHardwareAddr sets the hardware address of a vf for the link.
  329. // Equivalent to: `ip link set $link vf $vf mac $hwaddr`
  330. func LinkSetVfHardwareAddr(link Link, vf int, hwaddr net.HardwareAddr) error {
  331. return pkgHandle.LinkSetVfHardwareAddr(link, vf, hwaddr)
  332. }
  333. // LinkSetVfHardwareAddr sets the hardware address of a vf for the link.
  334. // Equivalent to: `ip link set $link vf $vf mac $hwaddr`
  335. func (h *Handle) LinkSetVfHardwareAddr(link Link, vf int, hwaddr net.HardwareAddr) error {
  336. base := link.Attrs()
  337. h.ensureIndex(base)
  338. req := h.newNetlinkRequest(unix.RTM_SETLINK, unix.NLM_F_ACK)
  339. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  340. msg.Index = int32(base.Index)
  341. req.AddData(msg)
  342. data := nl.NewRtAttr(unix.IFLA_VFINFO_LIST, nil)
  343. info := data.AddRtAttr(nl.IFLA_VF_INFO, nil)
  344. vfmsg := nl.VfMac{
  345. Vf: uint32(vf),
  346. }
  347. copy(vfmsg.Mac[:], []byte(hwaddr))
  348. info.AddRtAttr(nl.IFLA_VF_MAC, vfmsg.Serialize())
  349. req.AddData(data)
  350. _, err := req.Execute(unix.NETLINK_ROUTE, 0)
  351. return err
  352. }
  353. // LinkSetVfVlan sets the vlan of a vf for the link.
  354. // Equivalent to: `ip link set $link vf $vf vlan $vlan`
  355. func LinkSetVfVlan(link Link, vf, vlan int) error {
  356. return pkgHandle.LinkSetVfVlan(link, vf, vlan)
  357. }
  358. // LinkSetVfVlan sets the vlan of a vf for the link.
  359. // Equivalent to: `ip link set $link vf $vf vlan $vlan`
  360. func (h *Handle) LinkSetVfVlan(link Link, vf, vlan int) error {
  361. base := link.Attrs()
  362. h.ensureIndex(base)
  363. req := h.newNetlinkRequest(unix.RTM_SETLINK, unix.NLM_F_ACK)
  364. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  365. msg.Index = int32(base.Index)
  366. req.AddData(msg)
  367. data := nl.NewRtAttr(unix.IFLA_VFINFO_LIST, nil)
  368. info := data.AddRtAttr(nl.IFLA_VF_INFO, nil)
  369. vfmsg := nl.VfVlan{
  370. Vf: uint32(vf),
  371. Vlan: uint32(vlan),
  372. }
  373. info.AddRtAttr(nl.IFLA_VF_VLAN, vfmsg.Serialize())
  374. req.AddData(data)
  375. _, err := req.Execute(unix.NETLINK_ROUTE, 0)
  376. return err
  377. }
  378. // LinkSetVfTxRate sets the tx rate of a vf for the link.
  379. // Equivalent to: `ip link set $link vf $vf rate $rate`
  380. func LinkSetVfTxRate(link Link, vf, rate int) error {
  381. return pkgHandle.LinkSetVfTxRate(link, vf, rate)
  382. }
  383. // LinkSetVfTxRate sets the tx rate of a vf for the link.
  384. // Equivalent to: `ip link set $link vf $vf rate $rate`
  385. func (h *Handle) LinkSetVfTxRate(link Link, vf, rate int) error {
  386. base := link.Attrs()
  387. h.ensureIndex(base)
  388. req := h.newNetlinkRequest(unix.RTM_SETLINK, unix.NLM_F_ACK)
  389. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  390. msg.Index = int32(base.Index)
  391. req.AddData(msg)
  392. data := nl.NewRtAttr(unix.IFLA_VFINFO_LIST, nil)
  393. info := data.AddRtAttr(nl.IFLA_VF_INFO, nil)
  394. vfmsg := nl.VfTxRate{
  395. Vf: uint32(vf),
  396. Rate: uint32(rate),
  397. }
  398. info.AddRtAttr(nl.IFLA_VF_TX_RATE, vfmsg.Serialize())
  399. req.AddData(data)
  400. _, err := req.Execute(unix.NETLINK_ROUTE, 0)
  401. return err
  402. }
  403. // LinkSetVfSpoofchk enables/disables spoof check on a vf for the link.
  404. // Equivalent to: `ip link set $link vf $vf spoofchk $check`
  405. func LinkSetVfSpoofchk(link Link, vf int, check bool) error {
  406. return pkgHandle.LinkSetVfSpoofchk(link, vf, check)
  407. }
  408. // LinkSetVfSpookfchk enables/disables spoof check on a vf for the link.
  409. // Equivalent to: `ip link set $link vf $vf spoofchk $check`
  410. func (h *Handle) LinkSetVfSpoofchk(link Link, vf int, check bool) error {
  411. var setting uint32
  412. base := link.Attrs()
  413. h.ensureIndex(base)
  414. req := h.newNetlinkRequest(unix.RTM_SETLINK, unix.NLM_F_ACK)
  415. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  416. msg.Index = int32(base.Index)
  417. req.AddData(msg)
  418. data := nl.NewRtAttr(unix.IFLA_VFINFO_LIST, nil)
  419. info := data.AddRtAttr(nl.IFLA_VF_INFO, nil)
  420. if check {
  421. setting = 1
  422. }
  423. vfmsg := nl.VfSpoofchk{
  424. Vf: uint32(vf),
  425. Setting: setting,
  426. }
  427. info.AddRtAttr(nl.IFLA_VF_SPOOFCHK, vfmsg.Serialize())
  428. req.AddData(data)
  429. _, err := req.Execute(unix.NETLINK_ROUTE, 0)
  430. return err
  431. }
  432. // LinkSetVfTrust enables/disables trust state on a vf for the link.
  433. // Equivalent to: `ip link set $link vf $vf trust $state`
  434. func LinkSetVfTrust(link Link, vf int, state bool) error {
  435. return pkgHandle.LinkSetVfTrust(link, vf, state)
  436. }
  437. // LinkSetVfTrust enables/disables trust state on a vf for the link.
  438. // Equivalent to: `ip link set $link vf $vf trust $state`
  439. func (h *Handle) LinkSetVfTrust(link Link, vf int, state bool) error {
  440. var setting uint32
  441. base := link.Attrs()
  442. h.ensureIndex(base)
  443. req := h.newNetlinkRequest(unix.RTM_SETLINK, unix.NLM_F_ACK)
  444. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  445. msg.Index = int32(base.Index)
  446. req.AddData(msg)
  447. data := nl.NewRtAttr(unix.IFLA_VFINFO_LIST, nil)
  448. info := data.AddRtAttr(nl.IFLA_VF_INFO, nil)
  449. if state {
  450. setting = 1
  451. }
  452. vfmsg := nl.VfTrust{
  453. Vf: uint32(vf),
  454. Setting: setting,
  455. }
  456. info.AddRtAttr(nl.IFLA_VF_TRUST, vfmsg.Serialize())
  457. req.AddData(data)
  458. _, err := req.Execute(unix.NETLINK_ROUTE, 0)
  459. return err
  460. }
  461. // LinkSetVfNodeGUID sets the node GUID of a vf for the link.
  462. // Equivalent to: `ip link set dev $link vf $vf node_guid $nodeguid`
  463. func LinkSetVfNodeGUID(link Link, vf int, nodeguid net.HardwareAddr) error {
  464. return pkgHandle.LinkSetVfGUID(link, vf, nodeguid, nl.IFLA_VF_IB_NODE_GUID)
  465. }
  466. // LinkSetVfPortGUID sets the port GUID of a vf for the link.
  467. // Equivalent to: `ip link set dev $link vf $vf port_guid $portguid`
  468. func LinkSetVfPortGUID(link Link, vf int, portguid net.HardwareAddr) error {
  469. return pkgHandle.LinkSetVfGUID(link, vf, portguid, nl.IFLA_VF_IB_PORT_GUID)
  470. }
  471. // LinkSetVfGUID sets the node or port GUID of a vf for the link.
  472. func (h *Handle) LinkSetVfGUID(link Link, vf int, vfGuid net.HardwareAddr, guidType int) error {
  473. var err error
  474. var guid uint64
  475. buf := bytes.NewBuffer(vfGuid)
  476. err = binary.Read(buf, binary.LittleEndian, &guid)
  477. if err != nil {
  478. return err
  479. }
  480. base := link.Attrs()
  481. h.ensureIndex(base)
  482. req := h.newNetlinkRequest(unix.RTM_SETLINK, unix.NLM_F_ACK)
  483. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  484. msg.Index = int32(base.Index)
  485. req.AddData(msg)
  486. data := nl.NewRtAttr(unix.IFLA_VFINFO_LIST, nil)
  487. info := data.AddRtAttr(nl.IFLA_VF_INFO, nil)
  488. vfmsg := nl.VfGUID{
  489. Vf: uint32(vf),
  490. GUID: guid,
  491. }
  492. info.AddRtAttr(guidType, vfmsg.Serialize())
  493. req.AddData(data)
  494. _, err = req.Execute(unix.NETLINK_ROUTE, 0)
  495. return err
  496. }
  497. // LinkSetMaster sets the master of the link device.
  498. // Equivalent to: `ip link set $link master $master`
  499. func LinkSetMaster(link Link, master *Bridge) error {
  500. return pkgHandle.LinkSetMaster(link, master)
  501. }
  502. // LinkSetMaster sets the master of the link device.
  503. // Equivalent to: `ip link set $link master $master`
  504. func (h *Handle) LinkSetMaster(link Link, master *Bridge) error {
  505. index := 0
  506. if master != nil {
  507. masterBase := master.Attrs()
  508. h.ensureIndex(masterBase)
  509. index = masterBase.Index
  510. }
  511. if index <= 0 {
  512. return fmt.Errorf("Device does not exist")
  513. }
  514. return h.LinkSetMasterByIndex(link, index)
  515. }
  516. // LinkSetNoMaster removes the master of the link device.
  517. // Equivalent to: `ip link set $link nomaster`
  518. func LinkSetNoMaster(link Link) error {
  519. return pkgHandle.LinkSetNoMaster(link)
  520. }
  521. // LinkSetNoMaster removes the master of the link device.
  522. // Equivalent to: `ip link set $link nomaster`
  523. func (h *Handle) LinkSetNoMaster(link Link) error {
  524. return h.LinkSetMasterByIndex(link, 0)
  525. }
  526. // LinkSetMasterByIndex sets the master of the link device.
  527. // Equivalent to: `ip link set $link master $master`
  528. func LinkSetMasterByIndex(link Link, masterIndex int) error {
  529. return pkgHandle.LinkSetMasterByIndex(link, masterIndex)
  530. }
  531. // LinkSetMasterByIndex sets the master of the link device.
  532. // Equivalent to: `ip link set $link master $master`
  533. func (h *Handle) LinkSetMasterByIndex(link Link, masterIndex int) error {
  534. base := link.Attrs()
  535. h.ensureIndex(base)
  536. req := h.newNetlinkRequest(unix.RTM_SETLINK, unix.NLM_F_ACK)
  537. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  538. msg.Index = int32(base.Index)
  539. req.AddData(msg)
  540. b := make([]byte, 4)
  541. native.PutUint32(b, uint32(masterIndex))
  542. data := nl.NewRtAttr(unix.IFLA_MASTER, b)
  543. req.AddData(data)
  544. _, err := req.Execute(unix.NETLINK_ROUTE, 0)
  545. return err
  546. }
  547. // LinkSetNsPid puts the device into a new network namespace. The
  548. // pid must be a pid of a running process.
  549. // Equivalent to: `ip link set $link netns $pid`
  550. func LinkSetNsPid(link Link, nspid int) error {
  551. return pkgHandle.LinkSetNsPid(link, nspid)
  552. }
  553. // LinkSetNsPid puts the device into a new network namespace. The
  554. // pid must be a pid of a running process.
  555. // Equivalent to: `ip link set $link netns $pid`
  556. func (h *Handle) LinkSetNsPid(link Link, nspid int) error {
  557. base := link.Attrs()
  558. h.ensureIndex(base)
  559. req := h.newNetlinkRequest(unix.RTM_SETLINK, unix.NLM_F_ACK)
  560. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  561. msg.Index = int32(base.Index)
  562. req.AddData(msg)
  563. b := make([]byte, 4)
  564. native.PutUint32(b, uint32(nspid))
  565. data := nl.NewRtAttr(unix.IFLA_NET_NS_PID, b)
  566. req.AddData(data)
  567. _, err := req.Execute(unix.NETLINK_ROUTE, 0)
  568. return err
  569. }
  570. // LinkSetNsFd puts the device into a new network namespace. The
  571. // fd must be an open file descriptor to a network namespace.
  572. // Similar to: `ip link set $link netns $ns`
  573. func LinkSetNsFd(link Link, fd int) error {
  574. return pkgHandle.LinkSetNsFd(link, fd)
  575. }
  576. // LinkSetNsFd puts the device into a new network namespace. The
  577. // fd must be an open file descriptor to a network namespace.
  578. // Similar to: `ip link set $link netns $ns`
  579. func (h *Handle) LinkSetNsFd(link Link, fd int) error {
  580. base := link.Attrs()
  581. h.ensureIndex(base)
  582. req := h.newNetlinkRequest(unix.RTM_SETLINK, unix.NLM_F_ACK)
  583. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  584. msg.Index = int32(base.Index)
  585. req.AddData(msg)
  586. b := make([]byte, 4)
  587. native.PutUint32(b, uint32(fd))
  588. data := nl.NewRtAttr(unix.IFLA_NET_NS_FD, b)
  589. req.AddData(data)
  590. _, err := req.Execute(unix.NETLINK_ROUTE, 0)
  591. return err
  592. }
  593. // LinkSetXdpFd adds a bpf function to the driver. The fd must be a bpf
  594. // program loaded with bpf(type=BPF_PROG_TYPE_XDP)
  595. func LinkSetXdpFd(link Link, fd int) error {
  596. return LinkSetXdpFdWithFlags(link, fd, 0)
  597. }
  598. // LinkSetXdpFdWithFlags adds a bpf function to the driver with the given
  599. // options. The fd must be a bpf program loaded with bpf(type=BPF_PROG_TYPE_XDP)
  600. func LinkSetXdpFdWithFlags(link Link, fd, flags int) error {
  601. base := link.Attrs()
  602. ensureIndex(base)
  603. req := nl.NewNetlinkRequest(unix.RTM_SETLINK, unix.NLM_F_ACK)
  604. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  605. msg.Index = int32(base.Index)
  606. req.AddData(msg)
  607. addXdpAttrs(&LinkXdp{Fd: fd, Flags: uint32(flags)}, req)
  608. _, err := req.Execute(unix.NETLINK_ROUTE, 0)
  609. return err
  610. }
  611. func boolAttr(val bool) []byte {
  612. var v uint8
  613. if val {
  614. v = 1
  615. }
  616. return nl.Uint8Attr(v)
  617. }
  618. type vxlanPortRange struct {
  619. Lo, Hi uint16
  620. }
  621. func addVxlanAttrs(vxlan *Vxlan, linkInfo *nl.RtAttr) {
  622. data := linkInfo.AddRtAttr(nl.IFLA_INFO_DATA, nil)
  623. if vxlan.FlowBased {
  624. vxlan.VxlanId = 0
  625. }
  626. data.AddRtAttr(nl.IFLA_VXLAN_ID, nl.Uint32Attr(uint32(vxlan.VxlanId)))
  627. if vxlan.VtepDevIndex != 0 {
  628. data.AddRtAttr(nl.IFLA_VXLAN_LINK, nl.Uint32Attr(uint32(vxlan.VtepDevIndex)))
  629. }
  630. if vxlan.SrcAddr != nil {
  631. ip := vxlan.SrcAddr.To4()
  632. if ip != nil {
  633. data.AddRtAttr(nl.IFLA_VXLAN_LOCAL, []byte(ip))
  634. } else {
  635. ip = vxlan.SrcAddr.To16()
  636. if ip != nil {
  637. data.AddRtAttr(nl.IFLA_VXLAN_LOCAL6, []byte(ip))
  638. }
  639. }
  640. }
  641. if vxlan.Group != nil {
  642. group := vxlan.Group.To4()
  643. if group != nil {
  644. data.AddRtAttr(nl.IFLA_VXLAN_GROUP, []byte(group))
  645. } else {
  646. group = vxlan.Group.To16()
  647. if group != nil {
  648. data.AddRtAttr(nl.IFLA_VXLAN_GROUP6, []byte(group))
  649. }
  650. }
  651. }
  652. data.AddRtAttr(nl.IFLA_VXLAN_TTL, nl.Uint8Attr(uint8(vxlan.TTL)))
  653. data.AddRtAttr(nl.IFLA_VXLAN_TOS, nl.Uint8Attr(uint8(vxlan.TOS)))
  654. data.AddRtAttr(nl.IFLA_VXLAN_LEARNING, boolAttr(vxlan.Learning))
  655. data.AddRtAttr(nl.IFLA_VXLAN_PROXY, boolAttr(vxlan.Proxy))
  656. data.AddRtAttr(nl.IFLA_VXLAN_RSC, boolAttr(vxlan.RSC))
  657. data.AddRtAttr(nl.IFLA_VXLAN_L2MISS, boolAttr(vxlan.L2miss))
  658. data.AddRtAttr(nl.IFLA_VXLAN_L3MISS, boolAttr(vxlan.L3miss))
  659. data.AddRtAttr(nl.IFLA_VXLAN_UDP_ZERO_CSUM6_TX, boolAttr(vxlan.UDP6ZeroCSumTx))
  660. data.AddRtAttr(nl.IFLA_VXLAN_UDP_ZERO_CSUM6_RX, boolAttr(vxlan.UDP6ZeroCSumRx))
  661. if vxlan.UDPCSum {
  662. data.AddRtAttr(nl.IFLA_VXLAN_UDP_CSUM, boolAttr(vxlan.UDPCSum))
  663. }
  664. if vxlan.GBP {
  665. data.AddRtAttr(nl.IFLA_VXLAN_GBP, []byte{})
  666. }
  667. if vxlan.FlowBased {
  668. data.AddRtAttr(nl.IFLA_VXLAN_FLOWBASED, boolAttr(vxlan.FlowBased))
  669. }
  670. if vxlan.NoAge {
  671. data.AddRtAttr(nl.IFLA_VXLAN_AGEING, nl.Uint32Attr(0))
  672. } else if vxlan.Age > 0 {
  673. data.AddRtAttr(nl.IFLA_VXLAN_AGEING, nl.Uint32Attr(uint32(vxlan.Age)))
  674. }
  675. if vxlan.Limit > 0 {
  676. data.AddRtAttr(nl.IFLA_VXLAN_LIMIT, nl.Uint32Attr(uint32(vxlan.Limit)))
  677. }
  678. if vxlan.Port > 0 {
  679. data.AddRtAttr(nl.IFLA_VXLAN_PORT, htons(uint16(vxlan.Port)))
  680. }
  681. if vxlan.PortLow > 0 || vxlan.PortHigh > 0 {
  682. pr := vxlanPortRange{uint16(vxlan.PortLow), uint16(vxlan.PortHigh)}
  683. buf := new(bytes.Buffer)
  684. binary.Write(buf, binary.BigEndian, &pr)
  685. data.AddRtAttr(nl.IFLA_VXLAN_PORT_RANGE, buf.Bytes())
  686. }
  687. }
  688. func addBondAttrs(bond *Bond, linkInfo *nl.RtAttr) {
  689. data := linkInfo.AddRtAttr(nl.IFLA_INFO_DATA, nil)
  690. if bond.Mode >= 0 {
  691. data.AddRtAttr(nl.IFLA_BOND_MODE, nl.Uint8Attr(uint8(bond.Mode)))
  692. }
  693. if bond.ActiveSlave >= 0 {
  694. data.AddRtAttr(nl.IFLA_BOND_ACTIVE_SLAVE, nl.Uint32Attr(uint32(bond.ActiveSlave)))
  695. }
  696. if bond.Miimon >= 0 {
  697. data.AddRtAttr(nl.IFLA_BOND_MIIMON, nl.Uint32Attr(uint32(bond.Miimon)))
  698. }
  699. if bond.UpDelay >= 0 {
  700. data.AddRtAttr(nl.IFLA_BOND_UPDELAY, nl.Uint32Attr(uint32(bond.UpDelay)))
  701. }
  702. if bond.DownDelay >= 0 {
  703. data.AddRtAttr(nl.IFLA_BOND_DOWNDELAY, nl.Uint32Attr(uint32(bond.DownDelay)))
  704. }
  705. if bond.UseCarrier >= 0 {
  706. data.AddRtAttr(nl.IFLA_BOND_USE_CARRIER, nl.Uint8Attr(uint8(bond.UseCarrier)))
  707. }
  708. if bond.ArpInterval >= 0 {
  709. data.AddRtAttr(nl.IFLA_BOND_ARP_INTERVAL, nl.Uint32Attr(uint32(bond.ArpInterval)))
  710. }
  711. if bond.ArpIpTargets != nil {
  712. msg := data.AddRtAttr(nl.IFLA_BOND_ARP_IP_TARGET, nil)
  713. for i := range bond.ArpIpTargets {
  714. ip := bond.ArpIpTargets[i].To4()
  715. if ip != nil {
  716. msg.AddRtAttr(i, []byte(ip))
  717. continue
  718. }
  719. ip = bond.ArpIpTargets[i].To16()
  720. if ip != nil {
  721. msg.AddRtAttr(i, []byte(ip))
  722. }
  723. }
  724. }
  725. if bond.ArpValidate >= 0 {
  726. data.AddRtAttr(nl.IFLA_BOND_ARP_VALIDATE, nl.Uint32Attr(uint32(bond.ArpValidate)))
  727. }
  728. if bond.ArpAllTargets >= 0 {
  729. data.AddRtAttr(nl.IFLA_BOND_ARP_ALL_TARGETS, nl.Uint32Attr(uint32(bond.ArpAllTargets)))
  730. }
  731. if bond.Primary >= 0 {
  732. data.AddRtAttr(nl.IFLA_BOND_PRIMARY, nl.Uint32Attr(uint32(bond.Primary)))
  733. }
  734. if bond.PrimaryReselect >= 0 {
  735. data.AddRtAttr(nl.IFLA_BOND_PRIMARY_RESELECT, nl.Uint8Attr(uint8(bond.PrimaryReselect)))
  736. }
  737. if bond.FailOverMac >= 0 {
  738. data.AddRtAttr(nl.IFLA_BOND_FAIL_OVER_MAC, nl.Uint8Attr(uint8(bond.FailOverMac)))
  739. }
  740. if bond.XmitHashPolicy >= 0 {
  741. data.AddRtAttr(nl.IFLA_BOND_XMIT_HASH_POLICY, nl.Uint8Attr(uint8(bond.XmitHashPolicy)))
  742. }
  743. if bond.ResendIgmp >= 0 {
  744. data.AddRtAttr(nl.IFLA_BOND_RESEND_IGMP, nl.Uint32Attr(uint32(bond.ResendIgmp)))
  745. }
  746. if bond.NumPeerNotif >= 0 {
  747. data.AddRtAttr(nl.IFLA_BOND_NUM_PEER_NOTIF, nl.Uint8Attr(uint8(bond.NumPeerNotif)))
  748. }
  749. if bond.AllSlavesActive >= 0 {
  750. data.AddRtAttr(nl.IFLA_BOND_ALL_SLAVES_ACTIVE, nl.Uint8Attr(uint8(bond.AllSlavesActive)))
  751. }
  752. if bond.MinLinks >= 0 {
  753. data.AddRtAttr(nl.IFLA_BOND_MIN_LINKS, nl.Uint32Attr(uint32(bond.MinLinks)))
  754. }
  755. if bond.LpInterval >= 0 {
  756. data.AddRtAttr(nl.IFLA_BOND_LP_INTERVAL, nl.Uint32Attr(uint32(bond.LpInterval)))
  757. }
  758. if bond.PackersPerSlave >= 0 {
  759. data.AddRtAttr(nl.IFLA_BOND_PACKETS_PER_SLAVE, nl.Uint32Attr(uint32(bond.PackersPerSlave)))
  760. }
  761. if bond.LacpRate >= 0 {
  762. data.AddRtAttr(nl.IFLA_BOND_AD_LACP_RATE, nl.Uint8Attr(uint8(bond.LacpRate)))
  763. }
  764. if bond.AdSelect >= 0 {
  765. data.AddRtAttr(nl.IFLA_BOND_AD_SELECT, nl.Uint8Attr(uint8(bond.AdSelect)))
  766. }
  767. if bond.AdActorSysPrio >= 0 {
  768. data.AddRtAttr(nl.IFLA_BOND_AD_ACTOR_SYS_PRIO, nl.Uint16Attr(uint16(bond.AdActorSysPrio)))
  769. }
  770. if bond.AdUserPortKey >= 0 {
  771. data.AddRtAttr(nl.IFLA_BOND_AD_USER_PORT_KEY, nl.Uint16Attr(uint16(bond.AdUserPortKey)))
  772. }
  773. if bond.AdActorSystem != nil {
  774. data.AddRtAttr(nl.IFLA_BOND_AD_ACTOR_SYSTEM, []byte(bond.AdActorSystem))
  775. }
  776. if bond.TlbDynamicLb >= 0 {
  777. data.AddRtAttr(nl.IFLA_BOND_TLB_DYNAMIC_LB, nl.Uint8Attr(uint8(bond.TlbDynamicLb)))
  778. }
  779. }
  780. func cleanupFds(fds []*os.File) {
  781. for _, f := range fds {
  782. f.Close()
  783. }
  784. }
  785. // LinkAdd adds a new link device. The type and features of the device
  786. // are taken from the parameters in the link object.
  787. // Equivalent to: `ip link add $link`
  788. func LinkAdd(link Link) error {
  789. return pkgHandle.LinkAdd(link)
  790. }
  791. // LinkAdd adds a new link device. The type and features of the device
  792. // are taken from the parameters in the link object.
  793. // Equivalent to: `ip link add $link`
  794. func (h *Handle) LinkAdd(link Link) error {
  795. return h.linkModify(link, unix.NLM_F_CREATE|unix.NLM_F_EXCL|unix.NLM_F_ACK)
  796. }
  797. func (h *Handle) linkModify(link Link, flags int) error {
  798. // TODO: support extra data for macvlan
  799. base := link.Attrs()
  800. // if tuntap, then the name can be empty, OS will provide a name
  801. tuntap, isTuntap := link.(*Tuntap)
  802. if base.Name == "" && !isTuntap {
  803. return fmt.Errorf("LinkAttrs.Name cannot be empty")
  804. }
  805. if isTuntap {
  806. // TODO: support user
  807. // TODO: support group
  808. if tuntap.Mode < unix.IFF_TUN || tuntap.Mode > unix.IFF_TAP {
  809. return fmt.Errorf("Tuntap.Mode %v unknown", tuntap.Mode)
  810. }
  811. queues := tuntap.Queues
  812. var fds []*os.File
  813. var req ifReq
  814. copy(req.Name[:15], base.Name)
  815. req.Flags = uint16(tuntap.Flags)
  816. if queues == 0 { //Legacy compatibility
  817. queues = 1
  818. if tuntap.Flags == 0 {
  819. req.Flags = uint16(TUNTAP_DEFAULTS)
  820. }
  821. } else {
  822. // For best peformance set Flags to TUNTAP_MULTI_QUEUE_DEFAULTS | TUNTAP_VNET_HDR
  823. // when a) KVM has support for this ABI and
  824. // b) the value of the flag is queryable using the TUNGETIFF ioctl
  825. if tuntap.Flags == 0 {
  826. req.Flags = uint16(TUNTAP_MULTI_QUEUE_DEFAULTS)
  827. }
  828. }
  829. req.Flags |= uint16(tuntap.Mode)
  830. for i := 0; i < queues; i++ {
  831. localReq := req
  832. file, err := os.OpenFile("/dev/net/tun", os.O_RDWR, 0)
  833. if err != nil {
  834. cleanupFds(fds)
  835. return err
  836. }
  837. fds = append(fds, file)
  838. _, _, errno := unix.Syscall(unix.SYS_IOCTL, file.Fd(), uintptr(unix.TUNSETIFF), uintptr(unsafe.Pointer(&localReq)))
  839. if errno != 0 {
  840. cleanupFds(fds)
  841. return fmt.Errorf("Tuntap IOCTL TUNSETIFF failed [%d], errno %v", i, errno)
  842. }
  843. // 1) we only care for the name of the first tap in the multi queue set
  844. // 2) if the original name was empty, the localReq has now the actual name
  845. //
  846. // In addition:
  847. // This ensures that the link name is always identical to what the kernel returns.
  848. // Not only in case of an empty name, but also when using name templates.
  849. // e.g. when the provided name is "tap%d", the kernel replaces %d with the next available number.
  850. if i == 0 {
  851. link.Attrs().Name = strings.Trim(string(localReq.Name[:]), "\x00")
  852. }
  853. }
  854. // only persist interface if NonPersist is NOT set
  855. if !tuntap.NonPersist {
  856. _, _, errno := unix.Syscall(unix.SYS_IOCTL, fds[0].Fd(), uintptr(unix.TUNSETPERSIST), 1)
  857. if errno != 0 {
  858. cleanupFds(fds)
  859. return fmt.Errorf("Tuntap IOCTL TUNSETPERSIST failed, errno %v", errno)
  860. }
  861. }
  862. h.ensureIndex(base)
  863. // can't set master during create, so set it afterwards
  864. if base.MasterIndex != 0 {
  865. // TODO: verify MasterIndex is actually a bridge?
  866. err := h.LinkSetMasterByIndex(link, base.MasterIndex)
  867. if err != nil {
  868. // un-persist (e.g. allow the interface to be removed) the tuntap
  869. // should not hurt if not set prior, condition might be not needed
  870. if !tuntap.NonPersist {
  871. _, _, _ = unix.Syscall(unix.SYS_IOCTL, fds[0].Fd(), uintptr(unix.TUNSETPERSIST), 0)
  872. }
  873. cleanupFds(fds)
  874. return err
  875. }
  876. }
  877. if tuntap.Queues == 0 {
  878. cleanupFds(fds)
  879. } else {
  880. tuntap.Fds = fds
  881. }
  882. return nil
  883. }
  884. req := h.newNetlinkRequest(unix.RTM_NEWLINK, flags)
  885. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  886. // TODO: make it shorter
  887. if base.Flags&net.FlagUp != 0 {
  888. msg.Change = unix.IFF_UP
  889. msg.Flags = unix.IFF_UP
  890. }
  891. if base.Flags&net.FlagBroadcast != 0 {
  892. msg.Change |= unix.IFF_BROADCAST
  893. msg.Flags |= unix.IFF_BROADCAST
  894. }
  895. if base.Flags&net.FlagLoopback != 0 {
  896. msg.Change |= unix.IFF_LOOPBACK
  897. msg.Flags |= unix.IFF_LOOPBACK
  898. }
  899. if base.Flags&net.FlagPointToPoint != 0 {
  900. msg.Change |= unix.IFF_POINTOPOINT
  901. msg.Flags |= unix.IFF_POINTOPOINT
  902. }
  903. if base.Flags&net.FlagMulticast != 0 {
  904. msg.Change |= unix.IFF_MULTICAST
  905. msg.Flags |= unix.IFF_MULTICAST
  906. }
  907. if base.Index != 0 {
  908. msg.Index = int32(base.Index)
  909. }
  910. req.AddData(msg)
  911. if base.ParentIndex != 0 {
  912. b := make([]byte, 4)
  913. native.PutUint32(b, uint32(base.ParentIndex))
  914. data := nl.NewRtAttr(unix.IFLA_LINK, b)
  915. req.AddData(data)
  916. } else if link.Type() == "ipvlan" {
  917. return fmt.Errorf("Can't create ipvlan link without ParentIndex")
  918. }
  919. nameData := nl.NewRtAttr(unix.IFLA_IFNAME, nl.ZeroTerminated(base.Name))
  920. req.AddData(nameData)
  921. if base.MTU > 0 {
  922. mtu := nl.NewRtAttr(unix.IFLA_MTU, nl.Uint32Attr(uint32(base.MTU)))
  923. req.AddData(mtu)
  924. }
  925. if base.TxQLen >= 0 {
  926. qlen := nl.NewRtAttr(unix.IFLA_TXQLEN, nl.Uint32Attr(uint32(base.TxQLen)))
  927. req.AddData(qlen)
  928. }
  929. if base.HardwareAddr != nil {
  930. hwaddr := nl.NewRtAttr(unix.IFLA_ADDRESS, []byte(base.HardwareAddr))
  931. req.AddData(hwaddr)
  932. }
  933. if base.NumTxQueues > 0 {
  934. txqueues := nl.NewRtAttr(unix.IFLA_NUM_TX_QUEUES, nl.Uint32Attr(uint32(base.NumTxQueues)))
  935. req.AddData(txqueues)
  936. }
  937. if base.NumRxQueues > 0 {
  938. rxqueues := nl.NewRtAttr(unix.IFLA_NUM_RX_QUEUES, nl.Uint32Attr(uint32(base.NumRxQueues)))
  939. req.AddData(rxqueues)
  940. }
  941. if base.Namespace != nil {
  942. var attr *nl.RtAttr
  943. switch base.Namespace.(type) {
  944. case NsPid:
  945. val := nl.Uint32Attr(uint32(base.Namespace.(NsPid)))
  946. attr = nl.NewRtAttr(unix.IFLA_NET_NS_PID, val)
  947. case NsFd:
  948. val := nl.Uint32Attr(uint32(base.Namespace.(NsFd)))
  949. attr = nl.NewRtAttr(unix.IFLA_NET_NS_FD, val)
  950. }
  951. req.AddData(attr)
  952. }
  953. if base.Xdp != nil {
  954. addXdpAttrs(base.Xdp, req)
  955. }
  956. linkInfo := nl.NewRtAttr(unix.IFLA_LINKINFO, nil)
  957. linkInfo.AddRtAttr(nl.IFLA_INFO_KIND, nl.NonZeroTerminated(link.Type()))
  958. switch link := link.(type) {
  959. case *Vlan:
  960. b := make([]byte, 2)
  961. native.PutUint16(b, uint16(link.VlanId))
  962. data := linkInfo.AddRtAttr(nl.IFLA_INFO_DATA, nil)
  963. data.AddRtAttr(nl.IFLA_VLAN_ID, b)
  964. case *Veth:
  965. data := linkInfo.AddRtAttr(nl.IFLA_INFO_DATA, nil)
  966. peer := data.AddRtAttr(nl.VETH_INFO_PEER, nil)
  967. nl.NewIfInfomsgChild(peer, unix.AF_UNSPEC)
  968. peer.AddRtAttr(unix.IFLA_IFNAME, nl.ZeroTerminated(link.PeerName))
  969. if base.TxQLen >= 0 {
  970. peer.AddRtAttr(unix.IFLA_TXQLEN, nl.Uint32Attr(uint32(base.TxQLen)))
  971. }
  972. if base.MTU > 0 {
  973. peer.AddRtAttr(unix.IFLA_MTU, nl.Uint32Attr(uint32(base.MTU)))
  974. }
  975. case *Vxlan:
  976. addVxlanAttrs(link, linkInfo)
  977. case *Bond:
  978. addBondAttrs(link, linkInfo)
  979. case *IPVlan:
  980. data := linkInfo.AddRtAttr(nl.IFLA_INFO_DATA, nil)
  981. data.AddRtAttr(nl.IFLA_IPVLAN_MODE, nl.Uint16Attr(uint16(link.Mode)))
  982. case *Macvlan:
  983. if link.Mode != MACVLAN_MODE_DEFAULT {
  984. data := linkInfo.AddRtAttr(nl.IFLA_INFO_DATA, nil)
  985. data.AddRtAttr(nl.IFLA_MACVLAN_MODE, nl.Uint32Attr(macvlanModes[link.Mode]))
  986. }
  987. case *Macvtap:
  988. if link.Mode != MACVLAN_MODE_DEFAULT {
  989. data := linkInfo.AddRtAttr(nl.IFLA_INFO_DATA, nil)
  990. data.AddRtAttr(nl.IFLA_MACVLAN_MODE, nl.Uint32Attr(macvlanModes[link.Mode]))
  991. }
  992. case *Gretap:
  993. addGretapAttrs(link, linkInfo)
  994. case *Iptun:
  995. addIptunAttrs(link, linkInfo)
  996. case *Sittun:
  997. addSittunAttrs(link, linkInfo)
  998. case *Gretun:
  999. addGretunAttrs(link, linkInfo)
  1000. case *Vti:
  1001. addVtiAttrs(link, linkInfo)
  1002. case *Vrf:
  1003. addVrfAttrs(link, linkInfo)
  1004. case *Bridge:
  1005. addBridgeAttrs(link, linkInfo)
  1006. case *GTP:
  1007. addGTPAttrs(link, linkInfo)
  1008. }
  1009. req.AddData(linkInfo)
  1010. _, err := req.Execute(unix.NETLINK_ROUTE, 0)
  1011. if err != nil {
  1012. return err
  1013. }
  1014. h.ensureIndex(base)
  1015. // can't set master during create, so set it afterwards
  1016. if base.MasterIndex != 0 {
  1017. // TODO: verify MasterIndex is actually a bridge?
  1018. return h.LinkSetMasterByIndex(link, base.MasterIndex)
  1019. }
  1020. return nil
  1021. }
  1022. // LinkDel deletes link device. Either Index or Name must be set in
  1023. // the link object for it to be deleted. The other values are ignored.
  1024. // Equivalent to: `ip link del $link`
  1025. func LinkDel(link Link) error {
  1026. return pkgHandle.LinkDel(link)
  1027. }
  1028. // LinkDel deletes link device. Either Index or Name must be set in
  1029. // the link object for it to be deleted. The other values are ignored.
  1030. // Equivalent to: `ip link del $link`
  1031. func (h *Handle) LinkDel(link Link) error {
  1032. base := link.Attrs()
  1033. h.ensureIndex(base)
  1034. req := h.newNetlinkRequest(unix.RTM_DELLINK, unix.NLM_F_ACK)
  1035. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  1036. msg.Index = int32(base.Index)
  1037. req.AddData(msg)
  1038. _, err := req.Execute(unix.NETLINK_ROUTE, 0)
  1039. return err
  1040. }
  1041. func (h *Handle) linkByNameDump(name string) (Link, error) {
  1042. links, err := h.LinkList()
  1043. if err != nil {
  1044. return nil, err
  1045. }
  1046. for _, link := range links {
  1047. if link.Attrs().Name == name {
  1048. return link, nil
  1049. }
  1050. }
  1051. return nil, LinkNotFoundError{fmt.Errorf("Link %s not found", name)}
  1052. }
  1053. func (h *Handle) linkByAliasDump(alias string) (Link, error) {
  1054. links, err := h.LinkList()
  1055. if err != nil {
  1056. return nil, err
  1057. }
  1058. for _, link := range links {
  1059. if link.Attrs().Alias == alias {
  1060. return link, nil
  1061. }
  1062. }
  1063. return nil, LinkNotFoundError{fmt.Errorf("Link alias %s not found", alias)}
  1064. }
  1065. // LinkByName finds a link by name and returns a pointer to the object.
  1066. func LinkByName(name string) (Link, error) {
  1067. return pkgHandle.LinkByName(name)
  1068. }
  1069. // LinkByName finds a link by name and returns a pointer to the object.
  1070. func (h *Handle) LinkByName(name string) (Link, error) {
  1071. if h.lookupByDump {
  1072. return h.linkByNameDump(name)
  1073. }
  1074. req := h.newNetlinkRequest(unix.RTM_GETLINK, unix.NLM_F_ACK)
  1075. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  1076. req.AddData(msg)
  1077. attr := nl.NewRtAttr(unix.IFLA_EXT_MASK, nl.Uint32Attr(nl.RTEXT_FILTER_VF))
  1078. req.AddData(attr)
  1079. nameData := nl.NewRtAttr(unix.IFLA_IFNAME, nl.ZeroTerminated(name))
  1080. req.AddData(nameData)
  1081. link, err := execGetLink(req)
  1082. if err == unix.EINVAL {
  1083. // older kernels don't support looking up via IFLA_IFNAME
  1084. // so fall back to dumping all links
  1085. h.lookupByDump = true
  1086. return h.linkByNameDump(name)
  1087. }
  1088. return link, err
  1089. }
  1090. // LinkByAlias finds a link by its alias and returns a pointer to the object.
  1091. // If there are multiple links with the alias it returns the first one
  1092. func LinkByAlias(alias string) (Link, error) {
  1093. return pkgHandle.LinkByAlias(alias)
  1094. }
  1095. // LinkByAlias finds a link by its alias and returns a pointer to the object.
  1096. // If there are multiple links with the alias it returns the first one
  1097. func (h *Handle) LinkByAlias(alias string) (Link, error) {
  1098. if h.lookupByDump {
  1099. return h.linkByAliasDump(alias)
  1100. }
  1101. req := h.newNetlinkRequest(unix.RTM_GETLINK, unix.NLM_F_ACK)
  1102. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  1103. req.AddData(msg)
  1104. attr := nl.NewRtAttr(unix.IFLA_EXT_MASK, nl.Uint32Attr(nl.RTEXT_FILTER_VF))
  1105. req.AddData(attr)
  1106. nameData := nl.NewRtAttr(unix.IFLA_IFALIAS, nl.ZeroTerminated(alias))
  1107. req.AddData(nameData)
  1108. link, err := execGetLink(req)
  1109. if err == unix.EINVAL {
  1110. // older kernels don't support looking up via IFLA_IFALIAS
  1111. // so fall back to dumping all links
  1112. h.lookupByDump = true
  1113. return h.linkByAliasDump(alias)
  1114. }
  1115. return link, err
  1116. }
  1117. // LinkByIndex finds a link by index and returns a pointer to the object.
  1118. func LinkByIndex(index int) (Link, error) {
  1119. return pkgHandle.LinkByIndex(index)
  1120. }
  1121. // LinkByIndex finds a link by index and returns a pointer to the object.
  1122. func (h *Handle) LinkByIndex(index int) (Link, error) {
  1123. req := h.newNetlinkRequest(unix.RTM_GETLINK, unix.NLM_F_ACK)
  1124. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  1125. msg.Index = int32(index)
  1126. req.AddData(msg)
  1127. attr := nl.NewRtAttr(unix.IFLA_EXT_MASK, nl.Uint32Attr(nl.RTEXT_FILTER_VF))
  1128. req.AddData(attr)
  1129. return execGetLink(req)
  1130. }
  1131. func execGetLink(req *nl.NetlinkRequest) (Link, error) {
  1132. msgs, err := req.Execute(unix.NETLINK_ROUTE, 0)
  1133. if err != nil {
  1134. if errno, ok := err.(syscall.Errno); ok {
  1135. if errno == unix.ENODEV {
  1136. return nil, LinkNotFoundError{fmt.Errorf("Link not found")}
  1137. }
  1138. }
  1139. return nil, err
  1140. }
  1141. switch {
  1142. case len(msgs) == 0:
  1143. return nil, LinkNotFoundError{fmt.Errorf("Link not found")}
  1144. case len(msgs) == 1:
  1145. return LinkDeserialize(nil, msgs[0])
  1146. default:
  1147. return nil, fmt.Errorf("More than one link found")
  1148. }
  1149. }
  1150. // linkDeserialize deserializes a raw message received from netlink into
  1151. // a link object.
  1152. func LinkDeserialize(hdr *unix.NlMsghdr, m []byte) (Link, error) {
  1153. msg := nl.DeserializeIfInfomsg(m)
  1154. attrs, err := nl.ParseRouteAttr(m[msg.Len():])
  1155. if err != nil {
  1156. return nil, err
  1157. }
  1158. base := LinkAttrs{Index: int(msg.Index), RawFlags: msg.Flags, Flags: linkFlags(msg.Flags), EncapType: msg.EncapType()}
  1159. if msg.Flags&unix.IFF_PROMISC != 0 {
  1160. base.Promisc = 1
  1161. }
  1162. var (
  1163. link Link
  1164. stats32 []byte
  1165. stats64 []byte
  1166. linkType string
  1167. )
  1168. for _, attr := range attrs {
  1169. switch attr.Attr.Type {
  1170. case unix.IFLA_LINKINFO:
  1171. infos, err := nl.ParseRouteAttr(attr.Value)
  1172. if err != nil {
  1173. return nil, err
  1174. }
  1175. for _, info := range infos {
  1176. switch info.Attr.Type {
  1177. case nl.IFLA_INFO_KIND:
  1178. linkType = string(info.Value[:len(info.Value)-1])
  1179. switch linkType {
  1180. case "dummy":
  1181. link = &Dummy{}
  1182. case "ifb":
  1183. link = &Ifb{}
  1184. case "bridge":
  1185. link = &Bridge{}
  1186. case "vlan":
  1187. link = &Vlan{}
  1188. case "veth":
  1189. link = &Veth{}
  1190. case "vxlan":
  1191. link = &Vxlan{}
  1192. case "bond":
  1193. link = &Bond{}
  1194. case "ipvlan":
  1195. link = &IPVlan{}
  1196. case "macvlan":
  1197. link = &Macvlan{}
  1198. case "macvtap":
  1199. link = &Macvtap{}
  1200. case "gretap":
  1201. link = &Gretap{}
  1202. case "ip6gretap":
  1203. link = &Gretap{}
  1204. case "ipip":
  1205. link = &Iptun{}
  1206. case "sit":
  1207. link = &Sittun{}
  1208. case "gre":
  1209. link = &Gretun{}
  1210. case "ip6gre":
  1211. link = &Gretun{}
  1212. case "vti", "vti6":
  1213. link = &Vti{}
  1214. case "vrf":
  1215. link = &Vrf{}
  1216. case "gtp":
  1217. link = &GTP{}
  1218. default:
  1219. link = &GenericLink{LinkType: linkType}
  1220. }
  1221. case nl.IFLA_INFO_DATA:
  1222. data, err := nl.ParseRouteAttr(info.Value)
  1223. if err != nil {
  1224. return nil, err
  1225. }
  1226. switch linkType {
  1227. case "vlan":
  1228. parseVlanData(link, data)
  1229. case "vxlan":
  1230. parseVxlanData(link, data)
  1231. case "bond":
  1232. parseBondData(link, data)
  1233. case "ipvlan":
  1234. parseIPVlanData(link, data)
  1235. case "macvlan":
  1236. parseMacvlanData(link, data)
  1237. case "macvtap":
  1238. parseMacvtapData(link, data)
  1239. case "gretap":
  1240. parseGretapData(link, data)
  1241. case "ip6gretap":
  1242. parseGretapData(link, data)
  1243. case "ipip":
  1244. parseIptunData(link, data)
  1245. case "sit":
  1246. parseSittunData(link, data)
  1247. case "gre":
  1248. parseGretunData(link, data)
  1249. case "ip6gre":
  1250. parseGretunData(link, data)
  1251. case "vti", "vti6":
  1252. parseVtiData(link, data)
  1253. case "vrf":
  1254. parseVrfData(link, data)
  1255. case "bridge":
  1256. parseBridgeData(link, data)
  1257. case "gtp":
  1258. parseGTPData(link, data)
  1259. }
  1260. }
  1261. }
  1262. case unix.IFLA_ADDRESS:
  1263. var nonzero bool
  1264. for _, b := range attr.Value {
  1265. if b != 0 {
  1266. nonzero = true
  1267. }
  1268. }
  1269. if nonzero {
  1270. base.HardwareAddr = attr.Value[:]
  1271. }
  1272. case unix.IFLA_IFNAME:
  1273. base.Name = string(attr.Value[:len(attr.Value)-1])
  1274. case unix.IFLA_MTU:
  1275. base.MTU = int(native.Uint32(attr.Value[0:4]))
  1276. case unix.IFLA_LINK:
  1277. base.ParentIndex = int(native.Uint32(attr.Value[0:4]))
  1278. case unix.IFLA_MASTER:
  1279. base.MasterIndex = int(native.Uint32(attr.Value[0:4]))
  1280. case unix.IFLA_TXQLEN:
  1281. base.TxQLen = int(native.Uint32(attr.Value[0:4]))
  1282. case unix.IFLA_IFALIAS:
  1283. base.Alias = string(attr.Value[:len(attr.Value)-1])
  1284. case unix.IFLA_STATS:
  1285. stats32 = attr.Value[:]
  1286. case unix.IFLA_STATS64:
  1287. stats64 = attr.Value[:]
  1288. case unix.IFLA_XDP:
  1289. xdp, err := parseLinkXdp(attr.Value[:])
  1290. if err != nil {
  1291. return nil, err
  1292. }
  1293. base.Xdp = xdp
  1294. case unix.IFLA_PROTINFO | unix.NLA_F_NESTED:
  1295. if hdr != nil && hdr.Type == unix.RTM_NEWLINK &&
  1296. msg.Family == unix.AF_BRIDGE {
  1297. attrs, err := nl.ParseRouteAttr(attr.Value[:])
  1298. if err != nil {
  1299. return nil, err
  1300. }
  1301. protinfo := parseProtinfo(attrs)
  1302. base.Protinfo = &protinfo
  1303. }
  1304. case unix.IFLA_OPERSTATE:
  1305. base.OperState = LinkOperState(uint8(attr.Value[0]))
  1306. case unix.IFLA_LINK_NETNSID:
  1307. base.NetNsID = int(native.Uint32(attr.Value[0:4]))
  1308. case unix.IFLA_VFINFO_LIST:
  1309. data, err := nl.ParseRouteAttr(attr.Value)
  1310. if err != nil {
  1311. return nil, err
  1312. }
  1313. vfs, err := parseVfInfoList(data)
  1314. if err != nil {
  1315. return nil, err
  1316. }
  1317. base.Vfs = vfs
  1318. }
  1319. }
  1320. if stats64 != nil {
  1321. base.Statistics = parseLinkStats64(stats64)
  1322. } else if stats32 != nil {
  1323. base.Statistics = parseLinkStats32(stats32)
  1324. }
  1325. // Links that don't have IFLA_INFO_KIND are hardware devices
  1326. if link == nil {
  1327. link = &Device{}
  1328. }
  1329. *link.Attrs() = base
  1330. return link, nil
  1331. }
  1332. // LinkList gets a list of link devices.
  1333. // Equivalent to: `ip link show`
  1334. func LinkList() ([]Link, error) {
  1335. return pkgHandle.LinkList()
  1336. }
  1337. // LinkList gets a list of link devices.
  1338. // Equivalent to: `ip link show`
  1339. func (h *Handle) LinkList() ([]Link, error) {
  1340. // NOTE(vish): This duplicates functionality in net/iface_linux.go, but we need
  1341. // to get the message ourselves to parse link type.
  1342. req := h.newNetlinkRequest(unix.RTM_GETLINK, unix.NLM_F_DUMP)
  1343. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  1344. req.AddData(msg)
  1345. attr := nl.NewRtAttr(unix.IFLA_EXT_MASK, nl.Uint32Attr(nl.RTEXT_FILTER_VF))
  1346. req.AddData(attr)
  1347. msgs, err := req.Execute(unix.NETLINK_ROUTE, unix.RTM_NEWLINK)
  1348. if err != nil {
  1349. return nil, err
  1350. }
  1351. var res []Link
  1352. for _, m := range msgs {
  1353. link, err := LinkDeserialize(nil, m)
  1354. if err != nil {
  1355. return nil, err
  1356. }
  1357. res = append(res, link)
  1358. }
  1359. return res, nil
  1360. }
  1361. // LinkUpdate is used to pass information back from LinkSubscribe()
  1362. type LinkUpdate struct {
  1363. nl.IfInfomsg
  1364. Header unix.NlMsghdr
  1365. Link
  1366. }
  1367. // LinkSubscribe takes a chan down which notifications will be sent
  1368. // when links change. Close the 'done' chan to stop subscription.
  1369. func LinkSubscribe(ch chan<- LinkUpdate, done <-chan struct{}) error {
  1370. return linkSubscribeAt(netns.None(), netns.None(), ch, done, nil, false)
  1371. }
  1372. // LinkSubscribeAt works like LinkSubscribe plus it allows the caller
  1373. // to choose the network namespace in which to subscribe (ns).
  1374. func LinkSubscribeAt(ns netns.NsHandle, ch chan<- LinkUpdate, done <-chan struct{}) error {
  1375. return linkSubscribeAt(ns, netns.None(), ch, done, nil, false)
  1376. }
  1377. // LinkSubscribeOptions contains a set of options to use with
  1378. // LinkSubscribeWithOptions.
  1379. type LinkSubscribeOptions struct {
  1380. Namespace *netns.NsHandle
  1381. ErrorCallback func(error)
  1382. ListExisting bool
  1383. }
  1384. // LinkSubscribeWithOptions work like LinkSubscribe but enable to
  1385. // provide additional options to modify the behavior. Currently, the
  1386. // namespace can be provided as well as an error callback.
  1387. func LinkSubscribeWithOptions(ch chan<- LinkUpdate, done <-chan struct{}, options LinkSubscribeOptions) error {
  1388. if options.Namespace == nil {
  1389. none := netns.None()
  1390. options.Namespace = &none
  1391. }
  1392. return linkSubscribeAt(*options.Namespace, netns.None(), ch, done, options.ErrorCallback, options.ListExisting)
  1393. }
  1394. func linkSubscribeAt(newNs, curNs netns.NsHandle, ch chan<- LinkUpdate, done <-chan struct{}, cberr func(error), listExisting bool) error {
  1395. s, err := nl.SubscribeAt(newNs, curNs, unix.NETLINK_ROUTE, unix.RTNLGRP_LINK)
  1396. if err != nil {
  1397. return err
  1398. }
  1399. if done != nil {
  1400. go func() {
  1401. <-done
  1402. s.Close()
  1403. }()
  1404. }
  1405. if listExisting {
  1406. req := pkgHandle.newNetlinkRequest(unix.RTM_GETLINK,
  1407. unix.NLM_F_DUMP)
  1408. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  1409. req.AddData(msg)
  1410. if err := s.Send(req); err != nil {
  1411. return err
  1412. }
  1413. }
  1414. go func() {
  1415. defer close(ch)
  1416. for {
  1417. msgs, err := s.Receive()
  1418. if err != nil {
  1419. if cberr != nil {
  1420. cberr(err)
  1421. }
  1422. return
  1423. }
  1424. for _, m := range msgs {
  1425. if m.Header.Type == unix.NLMSG_DONE {
  1426. continue
  1427. }
  1428. if m.Header.Type == unix.NLMSG_ERROR {
  1429. native := nl.NativeEndian()
  1430. error := int32(native.Uint32(m.Data[0:4]))
  1431. if error == 0 {
  1432. continue
  1433. }
  1434. if cberr != nil {
  1435. cberr(syscall.Errno(-error))
  1436. }
  1437. return
  1438. }
  1439. ifmsg := nl.DeserializeIfInfomsg(m.Data)
  1440. header := unix.NlMsghdr(m.Header)
  1441. link, err := LinkDeserialize(&header, m.Data)
  1442. if err != nil {
  1443. if cberr != nil {
  1444. cberr(err)
  1445. }
  1446. return
  1447. }
  1448. ch <- LinkUpdate{IfInfomsg: *ifmsg, Header: header, Link: link}
  1449. }
  1450. }
  1451. }()
  1452. return nil
  1453. }
  1454. func LinkSetHairpin(link Link, mode bool) error {
  1455. return pkgHandle.LinkSetHairpin(link, mode)
  1456. }
  1457. func (h *Handle) LinkSetHairpin(link Link, mode bool) error {
  1458. return h.setProtinfoAttr(link, mode, nl.IFLA_BRPORT_MODE)
  1459. }
  1460. func LinkSetGuard(link Link, mode bool) error {
  1461. return pkgHandle.LinkSetGuard(link, mode)
  1462. }
  1463. func (h *Handle) LinkSetGuard(link Link, mode bool) error {
  1464. return h.setProtinfoAttr(link, mode, nl.IFLA_BRPORT_GUARD)
  1465. }
  1466. func LinkSetFastLeave(link Link, mode bool) error {
  1467. return pkgHandle.LinkSetFastLeave(link, mode)
  1468. }
  1469. func (h *Handle) LinkSetFastLeave(link Link, mode bool) error {
  1470. return h.setProtinfoAttr(link, mode, nl.IFLA_BRPORT_FAST_LEAVE)
  1471. }
  1472. func LinkSetLearning(link Link, mode bool) error {
  1473. return pkgHandle.LinkSetLearning(link, mode)
  1474. }
  1475. func (h *Handle) LinkSetLearning(link Link, mode bool) error {
  1476. return h.setProtinfoAttr(link, mode, nl.IFLA_BRPORT_LEARNING)
  1477. }
  1478. func LinkSetRootBlock(link Link, mode bool) error {
  1479. return pkgHandle.LinkSetRootBlock(link, mode)
  1480. }
  1481. func (h *Handle) LinkSetRootBlock(link Link, mode bool) error {
  1482. return h.setProtinfoAttr(link, mode, nl.IFLA_BRPORT_PROTECT)
  1483. }
  1484. func LinkSetFlood(link Link, mode bool) error {
  1485. return pkgHandle.LinkSetFlood(link, mode)
  1486. }
  1487. func (h *Handle) LinkSetFlood(link Link, mode bool) error {
  1488. return h.setProtinfoAttr(link, mode, nl.IFLA_BRPORT_UNICAST_FLOOD)
  1489. }
  1490. func LinkSetBrProxyArp(link Link, mode bool) error {
  1491. return pkgHandle.LinkSetBrProxyArp(link, mode)
  1492. }
  1493. func (h *Handle) LinkSetBrProxyArp(link Link, mode bool) error {
  1494. return h.setProtinfoAttr(link, mode, nl.IFLA_BRPORT_PROXYARP)
  1495. }
  1496. func LinkSetBrProxyArpWiFi(link Link, mode bool) error {
  1497. return pkgHandle.LinkSetBrProxyArpWiFi(link, mode)
  1498. }
  1499. func (h *Handle) LinkSetBrProxyArpWiFi(link Link, mode bool) error {
  1500. return h.setProtinfoAttr(link, mode, nl.IFLA_BRPORT_PROXYARP_WIFI)
  1501. }
  1502. func (h *Handle) setProtinfoAttr(link Link, mode bool, attr int) error {
  1503. base := link.Attrs()
  1504. h.ensureIndex(base)
  1505. req := h.newNetlinkRequest(unix.RTM_SETLINK, unix.NLM_F_ACK)
  1506. msg := nl.NewIfInfomsg(unix.AF_BRIDGE)
  1507. msg.Index = int32(base.Index)
  1508. req.AddData(msg)
  1509. br := nl.NewRtAttr(unix.IFLA_PROTINFO|unix.NLA_F_NESTED, nil)
  1510. br.AddRtAttr(attr, boolToByte(mode))
  1511. req.AddData(br)
  1512. _, err := req.Execute(unix.NETLINK_ROUTE, 0)
  1513. if err != nil {
  1514. return err
  1515. }
  1516. return nil
  1517. }
  1518. // LinkSetTxQLen sets the transaction queue length for the link.
  1519. // Equivalent to: `ip link set $link txqlen $qlen`
  1520. func LinkSetTxQLen(link Link, qlen int) error {
  1521. return pkgHandle.LinkSetTxQLen(link, qlen)
  1522. }
  1523. // LinkSetTxQLen sets the transaction queue length for the link.
  1524. // Equivalent to: `ip link set $link txqlen $qlen`
  1525. func (h *Handle) LinkSetTxQLen(link Link, qlen int) error {
  1526. base := link.Attrs()
  1527. h.ensureIndex(base)
  1528. req := h.newNetlinkRequest(unix.RTM_SETLINK, unix.NLM_F_ACK)
  1529. msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
  1530. msg.Index = int32(base.Index)
  1531. req.AddData(msg)
  1532. b := make([]byte, 4)
  1533. native.PutUint32(b, uint32(qlen))
  1534. data := nl.NewRtAttr(unix.IFLA_TXQLEN, b)
  1535. req.AddData(data)
  1536. _, err := req.Execute(unix.NETLINK_ROUTE, 0)
  1537. return err
  1538. }
  1539. func parseVlanData(link Link, data []syscall.NetlinkRouteAttr) {
  1540. vlan := link.(*Vlan)
  1541. for _, datum := range data {
  1542. switch datum.Attr.Type {
  1543. case nl.IFLA_VLAN_ID:
  1544. vlan.VlanId = int(native.Uint16(datum.Value[0:2]))
  1545. }
  1546. }
  1547. }
  1548. func parseVxlanData(link Link, data []syscall.NetlinkRouteAttr) {
  1549. vxlan := link.(*Vxlan)
  1550. for _, datum := range data {
  1551. switch datum.Attr.Type {
  1552. case nl.IFLA_VXLAN_ID:
  1553. vxlan.VxlanId = int(native.Uint32(datum.Value[0:4]))
  1554. case nl.IFLA_VXLAN_LINK:
  1555. vxlan.VtepDevIndex = int(native.Uint32(datum.Value[0:4]))
  1556. case nl.IFLA_VXLAN_LOCAL:
  1557. vxlan.SrcAddr = net.IP(datum.Value[0:4])
  1558. case nl.IFLA_VXLAN_LOCAL6:
  1559. vxlan.SrcAddr = net.IP(datum.Value[0:16])
  1560. case nl.IFLA_VXLAN_GROUP:
  1561. vxlan.Group = net.IP(datum.Value[0:4])
  1562. case nl.IFLA_VXLAN_GROUP6:
  1563. vxlan.Group = net.IP(datum.Value[0:16])
  1564. case nl.IFLA_VXLAN_TTL:
  1565. vxlan.TTL = int(datum.Value[0])
  1566. case nl.IFLA_VXLAN_TOS:
  1567. vxlan.TOS = int(datum.Value[0])
  1568. case nl.IFLA_VXLAN_LEARNING:
  1569. vxlan.Learning = int8(datum.Value[0]) != 0
  1570. case nl.IFLA_VXLAN_PROXY:
  1571. vxlan.Proxy = int8(datum.Value[0]) != 0
  1572. case nl.IFLA_VXLAN_RSC:
  1573. vxlan.RSC = int8(datum.Value[0]) != 0
  1574. case nl.IFLA_VXLAN_L2MISS:
  1575. vxlan.L2miss = int8(datum.Value[0]) != 0
  1576. case nl.IFLA_VXLAN_L3MISS:
  1577. vxlan.L3miss = int8(datum.Value[0]) != 0
  1578. case nl.IFLA_VXLAN_UDP_CSUM:
  1579. vxlan.UDPCSum = int8(datum.Value[0]) != 0
  1580. case nl.IFLA_VXLAN_UDP_ZERO_CSUM6_TX:
  1581. vxlan.UDP6ZeroCSumTx = int8(datum.Value[0]) != 0
  1582. case nl.IFLA_VXLAN_UDP_ZERO_CSUM6_RX:
  1583. vxlan.UDP6ZeroCSumRx = int8(datum.Value[0]) != 0
  1584. case nl.IFLA_VXLAN_GBP:
  1585. vxlan.GBP = true
  1586. case nl.IFLA_VXLAN_FLOWBASED:
  1587. vxlan.FlowBased = int8(datum.Value[0]) != 0
  1588. case nl.IFLA_VXLAN_AGEING:
  1589. vxlan.Age = int(native.Uint32(datum.Value[0:4]))
  1590. vxlan.NoAge = vxlan.Age == 0
  1591. case nl.IFLA_VXLAN_LIMIT:
  1592. vxlan.Limit = int(native.Uint32(datum.Value[0:4]))
  1593. case nl.IFLA_VXLAN_PORT:
  1594. vxlan.Port = int(ntohs(datum.Value[0:2]))
  1595. case nl.IFLA_VXLAN_PORT_RANGE:
  1596. buf := bytes.NewBuffer(datum.Value[0:4])
  1597. var pr vxlanPortRange
  1598. if binary.Read(buf, binary.BigEndian, &pr) != nil {
  1599. vxlan.PortLow = int(pr.Lo)
  1600. vxlan.PortHigh = int(pr.Hi)
  1601. }
  1602. }
  1603. }
  1604. }
  1605. func parseBondData(link Link, data []syscall.NetlinkRouteAttr) {
  1606. bond := link.(*Bond)
  1607. for i := range data {
  1608. switch data[i].Attr.Type {
  1609. case nl.IFLA_BOND_MODE:
  1610. bond.Mode = BondMode(data[i].Value[0])
  1611. case nl.IFLA_BOND_ACTIVE_SLAVE:
  1612. bond.ActiveSlave = int(native.Uint32(data[i].Value[0:4]))
  1613. case nl.IFLA_BOND_MIIMON:
  1614. bond.Miimon = int(native.Uint32(data[i].Value[0:4]))
  1615. case nl.IFLA_BOND_UPDELAY:
  1616. bond.UpDelay = int(native.Uint32(data[i].Value[0:4]))
  1617. case nl.IFLA_BOND_DOWNDELAY:
  1618. bond.DownDelay = int(native.Uint32(data[i].Value[0:4]))
  1619. case nl.IFLA_BOND_USE_CARRIER:
  1620. bond.UseCarrier = int(data[i].Value[0])
  1621. case nl.IFLA_BOND_ARP_INTERVAL:
  1622. bond.ArpInterval = int(native.Uint32(data[i].Value[0:4]))
  1623. case nl.IFLA_BOND_ARP_IP_TARGET:
  1624. // TODO: implement
  1625. case nl.IFLA_BOND_ARP_VALIDATE:
  1626. bond.ArpValidate = BondArpValidate(native.Uint32(data[i].Value[0:4]))
  1627. case nl.IFLA_BOND_ARP_ALL_TARGETS:
  1628. bond.ArpAllTargets = BondArpAllTargets(native.Uint32(data[i].Value[0:4]))
  1629. case nl.IFLA_BOND_PRIMARY:
  1630. bond.Primary = int(native.Uint32(data[i].Value[0:4]))
  1631. case nl.IFLA_BOND_PRIMARY_RESELECT:
  1632. bond.PrimaryReselect = BondPrimaryReselect(data[i].Value[0])
  1633. case nl.IFLA_BOND_FAIL_OVER_MAC:
  1634. bond.FailOverMac = BondFailOverMac(data[i].Value[0])
  1635. case nl.IFLA_BOND_XMIT_HASH_POLICY:
  1636. bond.XmitHashPolicy = BondXmitHashPolicy(data[i].Value[0])
  1637. case nl.IFLA_BOND_RESEND_IGMP:
  1638. bond.ResendIgmp = int(native.Uint32(data[i].Value[0:4]))
  1639. case nl.IFLA_BOND_NUM_PEER_NOTIF:
  1640. bond.NumPeerNotif = int(data[i].Value[0])
  1641. case nl.IFLA_BOND_ALL_SLAVES_ACTIVE:
  1642. bond.AllSlavesActive = int(data[i].Value[0])
  1643. case nl.IFLA_BOND_MIN_LINKS:
  1644. bond.MinLinks = int(native.Uint32(data[i].Value[0:4]))
  1645. case nl.IFLA_BOND_LP_INTERVAL:
  1646. bond.LpInterval = int(native.Uint32(data[i].Value[0:4]))
  1647. case nl.IFLA_BOND_PACKETS_PER_SLAVE:
  1648. bond.PackersPerSlave = int(native.Uint32(data[i].Value[0:4]))
  1649. case nl.IFLA_BOND_AD_LACP_RATE:
  1650. bond.LacpRate = BondLacpRate(data[i].Value[0])
  1651. case nl.IFLA_BOND_AD_SELECT:
  1652. bond.AdSelect = BondAdSelect(data[i].Value[0])
  1653. case nl.IFLA_BOND_AD_INFO:
  1654. // TODO: implement
  1655. case nl.IFLA_BOND_AD_ACTOR_SYS_PRIO:
  1656. bond.AdActorSysPrio = int(native.Uint16(data[i].Value[0:2]))
  1657. case nl.IFLA_BOND_AD_USER_PORT_KEY:
  1658. bond.AdUserPortKey = int(native.Uint16(data[i].Value[0:2]))
  1659. case nl.IFLA_BOND_AD_ACTOR_SYSTEM:
  1660. bond.AdActorSystem = net.HardwareAddr(data[i].Value[0:6])
  1661. case nl.IFLA_BOND_TLB_DYNAMIC_LB:
  1662. bond.TlbDynamicLb = int(data[i].Value[0])
  1663. }
  1664. }
  1665. }
  1666. func parseIPVlanData(link Link, data []syscall.NetlinkRouteAttr) {
  1667. ipv := link.(*IPVlan)
  1668. for _, datum := range data {
  1669. if datum.Attr.Type == nl.IFLA_IPVLAN_MODE {
  1670. ipv.Mode = IPVlanMode(native.Uint32(datum.Value[0:4]))
  1671. return
  1672. }
  1673. }
  1674. }
  1675. func parseMacvtapData(link Link, data []syscall.NetlinkRouteAttr) {
  1676. macv := link.(*Macvtap)
  1677. parseMacvlanData(&macv.Macvlan, data)
  1678. }
  1679. func parseMacvlanData(link Link, data []syscall.NetlinkRouteAttr) {
  1680. macv := link.(*Macvlan)
  1681. for _, datum := range data {
  1682. switch datum.Attr.Type {
  1683. case nl.IFLA_MACVLAN_MODE:
  1684. switch native.Uint32(datum.Value[0:4]) {
  1685. case nl.MACVLAN_MODE_PRIVATE:
  1686. macv.Mode = MACVLAN_MODE_PRIVATE
  1687. case nl.MACVLAN_MODE_VEPA:
  1688. macv.Mode = MACVLAN_MODE_VEPA
  1689. case nl.MACVLAN_MODE_BRIDGE:
  1690. macv.Mode = MACVLAN_MODE_BRIDGE
  1691. case nl.MACVLAN_MODE_PASSTHRU:
  1692. macv.Mode = MACVLAN_MODE_PASSTHRU
  1693. case nl.MACVLAN_MODE_SOURCE:
  1694. macv.Mode = MACVLAN_MODE_SOURCE
  1695. }
  1696. case nl.IFLA_MACVLAN_MACADDR_COUNT:
  1697. macv.MACAddrs = make([]net.HardwareAddr, 0, int(native.Uint32(datum.Value[0:4])))
  1698. case nl.IFLA_MACVLAN_MACADDR_DATA:
  1699. macs, err := nl.ParseRouteAttr(datum.Value[:])
  1700. if err != nil {
  1701. panic(fmt.Sprintf("failed to ParseRouteAttr for IFLA_MACVLAN_MACADDR_DATA: %v", err))
  1702. }
  1703. for _, macDatum := range macs {
  1704. macv.MACAddrs = append(macv.MACAddrs, net.HardwareAddr(macDatum.Value[0:6]))
  1705. }
  1706. }
  1707. }
  1708. }
  1709. // copied from pkg/net_linux.go
  1710. func linkFlags(rawFlags uint32) net.Flags {
  1711. var f net.Flags
  1712. if rawFlags&unix.IFF_UP != 0 {
  1713. f |= net.FlagUp
  1714. }
  1715. if rawFlags&unix.IFF_BROADCAST != 0 {
  1716. f |= net.FlagBroadcast
  1717. }
  1718. if rawFlags&unix.IFF_LOOPBACK != 0 {
  1719. f |= net.FlagLoopback
  1720. }
  1721. if rawFlags&unix.IFF_POINTOPOINT != 0 {
  1722. f |= net.FlagPointToPoint
  1723. }
  1724. if rawFlags&unix.IFF_MULTICAST != 0 {
  1725. f |= net.FlagMulticast
  1726. }
  1727. return f
  1728. }
  1729. func addGretapAttrs(gretap *Gretap, linkInfo *nl.RtAttr) {
  1730. data := linkInfo.AddRtAttr(nl.IFLA_INFO_DATA, nil)
  1731. if gretap.FlowBased {
  1732. // In flow based mode, no other attributes need to be configured
  1733. data.AddRtAttr(nl.IFLA_GRE_COLLECT_METADATA, boolAttr(gretap.FlowBased))
  1734. return
  1735. }
  1736. if ip := gretap.Local; ip != nil {
  1737. if ip.To4() != nil {
  1738. ip = ip.To4()
  1739. }
  1740. data.AddRtAttr(nl.IFLA_GRE_LOCAL, []byte(ip))
  1741. }
  1742. if ip := gretap.Remote; ip != nil {
  1743. if ip.To4() != nil {
  1744. ip = ip.To4()
  1745. }
  1746. data.AddRtAttr(nl.IFLA_GRE_REMOTE, []byte(ip))
  1747. }
  1748. if gretap.IKey != 0 {
  1749. data.AddRtAttr(nl.IFLA_GRE_IKEY, htonl(gretap.IKey))
  1750. gretap.IFlags |= uint16(nl.GRE_KEY)
  1751. }
  1752. if gretap.OKey != 0 {
  1753. data.AddRtAttr(nl.IFLA_GRE_OKEY, htonl(gretap.OKey))
  1754. gretap.OFlags |= uint16(nl.GRE_KEY)
  1755. }
  1756. data.AddRtAttr(nl.IFLA_GRE_IFLAGS, htons(gretap.IFlags))
  1757. data.AddRtAttr(nl.IFLA_GRE_OFLAGS, htons(gretap.OFlags))
  1758. if gretap.Link != 0 {
  1759. data.AddRtAttr(nl.IFLA_GRE_LINK, nl.Uint32Attr(gretap.Link))
  1760. }
  1761. data.AddRtAttr(nl.IFLA_GRE_PMTUDISC, nl.Uint8Attr(gretap.PMtuDisc))
  1762. data.AddRtAttr(nl.IFLA_GRE_TTL, nl.Uint8Attr(gretap.Ttl))
  1763. data.AddRtAttr(nl.IFLA_GRE_TOS, nl.Uint8Attr(gretap.Tos))
  1764. data.AddRtAttr(nl.IFLA_GRE_ENCAP_TYPE, nl.Uint16Attr(gretap.EncapType))
  1765. data.AddRtAttr(nl.IFLA_GRE_ENCAP_FLAGS, nl.Uint16Attr(gretap.EncapFlags))
  1766. data.AddRtAttr(nl.IFLA_GRE_ENCAP_SPORT, htons(gretap.EncapSport))
  1767. data.AddRtAttr(nl.IFLA_GRE_ENCAP_DPORT, htons(gretap.EncapDport))
  1768. }
  1769. func parseGretapData(link Link, data []syscall.NetlinkRouteAttr) {
  1770. gre := link.(*Gretap)
  1771. for _, datum := range data {
  1772. switch datum.Attr.Type {
  1773. case nl.IFLA_GRE_OKEY:
  1774. gre.IKey = ntohl(datum.Value[0:4])
  1775. case nl.IFLA_GRE_IKEY:
  1776. gre.OKey = ntohl(datum.Value[0:4])
  1777. case nl.IFLA_GRE_LOCAL:
  1778. gre.Local = net.IP(datum.Value)
  1779. case nl.IFLA_GRE_REMOTE:
  1780. gre.Remote = net.IP(datum.Value)
  1781. case nl.IFLA_GRE_ENCAP_SPORT:
  1782. gre.EncapSport = ntohs(datum.Value[0:2])
  1783. case nl.IFLA_GRE_ENCAP_DPORT:
  1784. gre.EncapDport = ntohs(datum.Value[0:2])
  1785. case nl.IFLA_GRE_IFLAGS:
  1786. gre.IFlags = ntohs(datum.Value[0:2])
  1787. case nl.IFLA_GRE_OFLAGS:
  1788. gre.OFlags = ntohs(datum.Value[0:2])
  1789. case nl.IFLA_GRE_TTL:
  1790. gre.Ttl = uint8(datum.Value[0])
  1791. case nl.IFLA_GRE_TOS:
  1792. gre.Tos = uint8(datum.Value[0])
  1793. case nl.IFLA_GRE_PMTUDISC:
  1794. gre.PMtuDisc = uint8(datum.Value[0])
  1795. case nl.IFLA_GRE_ENCAP_TYPE:
  1796. gre.EncapType = native.Uint16(datum.Value[0:2])
  1797. case nl.IFLA_GRE_ENCAP_FLAGS:
  1798. gre.EncapFlags = native.Uint16(datum.Value[0:2])
  1799. case nl.IFLA_GRE_COLLECT_METADATA:
  1800. if len(datum.Value) > 0 {
  1801. gre.FlowBased = int8(datum.Value[0]) != 0
  1802. }
  1803. }
  1804. }
  1805. }
  1806. func addGretunAttrs(gre *Gretun, linkInfo *nl.RtAttr) {
  1807. data := linkInfo.AddRtAttr(nl.IFLA_INFO_DATA, nil)
  1808. if ip := gre.Local; ip != nil {
  1809. if ip.To4() != nil {
  1810. ip = ip.To4()
  1811. }
  1812. data.AddRtAttr(nl.IFLA_GRE_LOCAL, []byte(ip))
  1813. }
  1814. if ip := gre.Remote; ip != nil {
  1815. if ip.To4() != nil {
  1816. ip = ip.To4()
  1817. }
  1818. data.AddRtAttr(nl.IFLA_GRE_REMOTE, []byte(ip))
  1819. }
  1820. if gre.IKey != 0 {
  1821. data.AddRtAttr(nl.IFLA_GRE_IKEY, htonl(gre.IKey))
  1822. gre.IFlags |= uint16(nl.GRE_KEY)
  1823. }
  1824. if gre.OKey != 0 {
  1825. data.AddRtAttr(nl.IFLA_GRE_OKEY, htonl(gre.OKey))
  1826. gre.OFlags |= uint16(nl.GRE_KEY)
  1827. }
  1828. data.AddRtAttr(nl.IFLA_GRE_IFLAGS, htons(gre.IFlags))
  1829. data.AddRtAttr(nl.IFLA_GRE_OFLAGS, htons(gre.OFlags))
  1830. if gre.Link != 0 {
  1831. data.AddRtAttr(nl.IFLA_GRE_LINK, nl.Uint32Attr(gre.Link))
  1832. }
  1833. data.AddRtAttr(nl.IFLA_GRE_PMTUDISC, nl.Uint8Attr(gre.PMtuDisc))
  1834. data.AddRtAttr(nl.IFLA_GRE_TTL, nl.Uint8Attr(gre.Ttl))
  1835. data.AddRtAttr(nl.IFLA_GRE_TOS, nl.Uint8Attr(gre.Tos))
  1836. data.AddRtAttr(nl.IFLA_GRE_ENCAP_TYPE, nl.Uint16Attr(gre.EncapType))
  1837. data.AddRtAttr(nl.IFLA_GRE_ENCAP_FLAGS, nl.Uint16Attr(gre.EncapFlags))
  1838. data.AddRtAttr(nl.IFLA_GRE_ENCAP_SPORT, htons(gre.EncapSport))
  1839. data.AddRtAttr(nl.IFLA_GRE_ENCAP_DPORT, htons(gre.EncapDport))
  1840. }
  1841. func parseGretunData(link Link, data []syscall.NetlinkRouteAttr) {
  1842. gre := link.(*Gretun)
  1843. for _, datum := range data {
  1844. switch datum.Attr.Type {
  1845. case nl.IFLA_GRE_IKEY:
  1846. gre.IKey = ntohl(datum.Value[0:4])
  1847. case nl.IFLA_GRE_OKEY:
  1848. gre.OKey = ntohl(datum.Value[0:4])
  1849. case nl.IFLA_GRE_LOCAL:
  1850. gre.Local = net.IP(datum.Value)
  1851. case nl.IFLA_GRE_REMOTE:
  1852. gre.Remote = net.IP(datum.Value)
  1853. case nl.IFLA_GRE_IFLAGS:
  1854. gre.IFlags = ntohs(datum.Value[0:2])
  1855. case nl.IFLA_GRE_OFLAGS:
  1856. gre.OFlags = ntohs(datum.Value[0:2])
  1857. case nl.IFLA_GRE_TTL:
  1858. gre.Ttl = uint8(datum.Value[0])
  1859. case nl.IFLA_GRE_TOS:
  1860. gre.Tos = uint8(datum.Value[0])
  1861. case nl.IFLA_GRE_PMTUDISC:
  1862. gre.PMtuDisc = uint8(datum.Value[0])
  1863. case nl.IFLA_GRE_ENCAP_TYPE:
  1864. gre.EncapType = native.Uint16(datum.Value[0:2])
  1865. case nl.IFLA_GRE_ENCAP_FLAGS:
  1866. gre.EncapFlags = native.Uint16(datum.Value[0:2])
  1867. case nl.IFLA_GRE_ENCAP_SPORT:
  1868. gre.EncapSport = ntohs(datum.Value[0:2])
  1869. case nl.IFLA_GRE_ENCAP_DPORT:
  1870. gre.EncapDport = ntohs(datum.Value[0:2])
  1871. }
  1872. }
  1873. }
  1874. func parseLinkStats32(data []byte) *LinkStatistics {
  1875. return (*LinkStatistics)((*LinkStatistics32)(unsafe.Pointer(&data[0:SizeofLinkStats32][0])).to64())
  1876. }
  1877. func parseLinkStats64(data []byte) *LinkStatistics {
  1878. return (*LinkStatistics)((*LinkStatistics64)(unsafe.Pointer(&data[0:SizeofLinkStats64][0])))
  1879. }
  1880. func addXdpAttrs(xdp *LinkXdp, req *nl.NetlinkRequest) {
  1881. attrs := nl.NewRtAttr(unix.IFLA_XDP|unix.NLA_F_NESTED, nil)
  1882. b := make([]byte, 4)
  1883. native.PutUint32(b, uint32(xdp.Fd))
  1884. attrs.AddRtAttr(nl.IFLA_XDP_FD, b)
  1885. if xdp.Flags != 0 {
  1886. b := make([]byte, 4)
  1887. native.PutUint32(b, xdp.Flags)
  1888. attrs.AddRtAttr(nl.IFLA_XDP_FLAGS, b)
  1889. }
  1890. req.AddData(attrs)
  1891. }
  1892. func parseLinkXdp(data []byte) (*LinkXdp, error) {
  1893. attrs, err := nl.ParseRouteAttr(data)
  1894. if err != nil {
  1895. return nil, err
  1896. }
  1897. xdp := &LinkXdp{}
  1898. for _, attr := range attrs {
  1899. switch attr.Attr.Type {
  1900. case nl.IFLA_XDP_FD:
  1901. xdp.Fd = int(native.Uint32(attr.Value[0:4]))
  1902. case nl.IFLA_XDP_ATTACHED:
  1903. xdp.Attached = attr.Value[0] != 0
  1904. case nl.IFLA_XDP_FLAGS:
  1905. xdp.Flags = native.Uint32(attr.Value[0:4])
  1906. case nl.IFLA_XDP_PROG_ID:
  1907. xdp.ProgId = native.Uint32(attr.Value[0:4])
  1908. }
  1909. }
  1910. return xdp, nil
  1911. }
  1912. func addIptunAttrs(iptun *Iptun, linkInfo *nl.RtAttr) {
  1913. if iptun.FlowBased {
  1914. // In flow based mode, no other attributes need to be configured
  1915. linkInfo.AddRtAttr(nl.IFLA_IPTUN_COLLECT_METADATA, boolAttr(iptun.FlowBased))
  1916. return
  1917. }
  1918. data := linkInfo.AddRtAttr(nl.IFLA_INFO_DATA, nil)
  1919. ip := iptun.Local.To4()
  1920. if ip != nil {
  1921. data.AddRtAttr(nl.IFLA_IPTUN_LOCAL, []byte(ip))
  1922. }
  1923. ip = iptun.Remote.To4()
  1924. if ip != nil {
  1925. data.AddRtAttr(nl.IFLA_IPTUN_REMOTE, []byte(ip))
  1926. }
  1927. if iptun.Link != 0 {
  1928. data.AddRtAttr(nl.IFLA_IPTUN_LINK, nl.Uint32Attr(iptun.Link))
  1929. }
  1930. data.AddRtAttr(nl.IFLA_IPTUN_PMTUDISC, nl.Uint8Attr(iptun.PMtuDisc))
  1931. data.AddRtAttr(nl.IFLA_IPTUN_TTL, nl.Uint8Attr(iptun.Ttl))
  1932. data.AddRtAttr(nl.IFLA_IPTUN_TOS, nl.Uint8Attr(iptun.Tos))
  1933. data.AddRtAttr(nl.IFLA_IPTUN_ENCAP_TYPE, nl.Uint16Attr(iptun.EncapType))
  1934. data.AddRtAttr(nl.IFLA_IPTUN_ENCAP_FLAGS, nl.Uint16Attr(iptun.EncapFlags))
  1935. data.AddRtAttr(nl.IFLA_IPTUN_ENCAP_SPORT, htons(iptun.EncapSport))
  1936. data.AddRtAttr(nl.IFLA_IPTUN_ENCAP_DPORT, htons(iptun.EncapDport))
  1937. }
  1938. func parseIptunData(link Link, data []syscall.NetlinkRouteAttr) {
  1939. iptun := link.(*Iptun)
  1940. for _, datum := range data {
  1941. switch datum.Attr.Type {
  1942. case nl.IFLA_IPTUN_LOCAL:
  1943. iptun.Local = net.IP(datum.Value[0:4])
  1944. case nl.IFLA_IPTUN_REMOTE:
  1945. iptun.Remote = net.IP(datum.Value[0:4])
  1946. case nl.IFLA_IPTUN_TTL:
  1947. iptun.Ttl = uint8(datum.Value[0])
  1948. case nl.IFLA_IPTUN_TOS:
  1949. iptun.Tos = uint8(datum.Value[0])
  1950. case nl.IFLA_IPTUN_PMTUDISC:
  1951. iptun.PMtuDisc = uint8(datum.Value[0])
  1952. case nl.IFLA_IPTUN_ENCAP_SPORT:
  1953. iptun.EncapSport = ntohs(datum.Value[0:2])
  1954. case nl.IFLA_IPTUN_ENCAP_DPORT:
  1955. iptun.EncapDport = ntohs(datum.Value[0:2])
  1956. case nl.IFLA_IPTUN_ENCAP_TYPE:
  1957. iptun.EncapType = native.Uint16(datum.Value[0:2])
  1958. case nl.IFLA_IPTUN_ENCAP_FLAGS:
  1959. iptun.EncapFlags = native.Uint16(datum.Value[0:2])
  1960. case nl.IFLA_IPTUN_COLLECT_METADATA:
  1961. iptun.FlowBased = int8(datum.Value[0]) != 0
  1962. }
  1963. }
  1964. }
  1965. func addSittunAttrs(sittun *Sittun, linkInfo *nl.RtAttr) {
  1966. data := linkInfo.AddRtAttr(nl.IFLA_INFO_DATA, nil)
  1967. if sittun.Link != 0 {
  1968. data.AddRtAttr(nl.IFLA_IPTUN_LINK, nl.Uint32Attr(sittun.Link))
  1969. }
  1970. ip := sittun.Local.To4()
  1971. if ip != nil {
  1972. data.AddRtAttr(nl.IFLA_IPTUN_LOCAL, []byte(ip))
  1973. }
  1974. ip = sittun.Remote.To4()
  1975. if ip != nil {
  1976. data.AddRtAttr(nl.IFLA_IPTUN_REMOTE, []byte(ip))
  1977. }
  1978. if sittun.Ttl > 0 {
  1979. // Would otherwise fail on 3.10 kernel
  1980. data.AddRtAttr(nl.IFLA_IPTUN_TTL, nl.Uint8Attr(sittun.Ttl))
  1981. }
  1982. data.AddRtAttr(nl.IFLA_IPTUN_TOS, nl.Uint8Attr(sittun.Tos))
  1983. data.AddRtAttr(nl.IFLA_IPTUN_PMTUDISC, nl.Uint8Attr(sittun.PMtuDisc))
  1984. data.AddRtAttr(nl.IFLA_IPTUN_ENCAP_TYPE, nl.Uint16Attr(sittun.EncapType))
  1985. data.AddRtAttr(nl.IFLA_IPTUN_ENCAP_FLAGS, nl.Uint16Attr(sittun.EncapFlags))
  1986. data.AddRtAttr(nl.IFLA_IPTUN_ENCAP_SPORT, htons(sittun.EncapSport))
  1987. data.AddRtAttr(nl.IFLA_IPTUN_ENCAP_DPORT, htons(sittun.EncapDport))
  1988. }
  1989. func parseSittunData(link Link, data []syscall.NetlinkRouteAttr) {
  1990. sittun := link.(*Sittun)
  1991. for _, datum := range data {
  1992. switch datum.Attr.Type {
  1993. case nl.IFLA_IPTUN_LOCAL:
  1994. sittun.Local = net.IP(datum.Value[0:4])
  1995. case nl.IFLA_IPTUN_REMOTE:
  1996. sittun.Remote = net.IP(datum.Value[0:4])
  1997. case nl.IFLA_IPTUN_TTL:
  1998. sittun.Ttl = uint8(datum.Value[0])
  1999. case nl.IFLA_IPTUN_TOS:
  2000. sittun.Tos = uint8(datum.Value[0])
  2001. case nl.IFLA_IPTUN_PMTUDISC:
  2002. sittun.PMtuDisc = uint8(datum.Value[0])
  2003. case nl.IFLA_IPTUN_ENCAP_TYPE:
  2004. sittun.EncapType = native.Uint16(datum.Value[0:2])
  2005. case nl.IFLA_IPTUN_ENCAP_FLAGS:
  2006. sittun.EncapFlags = native.Uint16(datum.Value[0:2])
  2007. case nl.IFLA_IPTUN_ENCAP_SPORT:
  2008. sittun.EncapSport = ntohs(datum.Value[0:2])
  2009. case nl.IFLA_IPTUN_ENCAP_DPORT:
  2010. sittun.EncapDport = ntohs(datum.Value[0:2])
  2011. }
  2012. }
  2013. }
  2014. func addVtiAttrs(vti *Vti, linkInfo *nl.RtAttr) {
  2015. data := linkInfo.AddRtAttr(nl.IFLA_INFO_DATA, nil)
  2016. family := FAMILY_V4
  2017. if vti.Local.To4() == nil {
  2018. family = FAMILY_V6
  2019. }
  2020. var ip net.IP
  2021. if family == FAMILY_V4 {
  2022. ip = vti.Local.To4()
  2023. } else {
  2024. ip = vti.Local
  2025. }
  2026. if ip != nil {
  2027. data.AddRtAttr(nl.IFLA_VTI_LOCAL, []byte(ip))
  2028. }
  2029. if family == FAMILY_V4 {
  2030. ip = vti.Remote.To4()
  2031. } else {
  2032. ip = vti.Remote
  2033. }
  2034. if ip != nil {
  2035. data.AddRtAttr(nl.IFLA_VTI_REMOTE, []byte(ip))
  2036. }
  2037. if vti.Link != 0 {
  2038. data.AddRtAttr(nl.IFLA_VTI_LINK, nl.Uint32Attr(vti.Link))
  2039. }
  2040. data.AddRtAttr(nl.IFLA_VTI_IKEY, htonl(vti.IKey))
  2041. data.AddRtAttr(nl.IFLA_VTI_OKEY, htonl(vti.OKey))
  2042. }
  2043. func parseVtiData(link Link, data []syscall.NetlinkRouteAttr) {
  2044. vti := link.(*Vti)
  2045. for _, datum := range data {
  2046. switch datum.Attr.Type {
  2047. case nl.IFLA_VTI_LOCAL:
  2048. vti.Local = net.IP(datum.Value)
  2049. case nl.IFLA_VTI_REMOTE:
  2050. vti.Remote = net.IP(datum.Value)
  2051. case nl.IFLA_VTI_IKEY:
  2052. vti.IKey = ntohl(datum.Value[0:4])
  2053. case nl.IFLA_VTI_OKEY:
  2054. vti.OKey = ntohl(datum.Value[0:4])
  2055. }
  2056. }
  2057. }
  2058. func addVrfAttrs(vrf *Vrf, linkInfo *nl.RtAttr) {
  2059. data := linkInfo.AddRtAttr(nl.IFLA_INFO_DATA, nil)
  2060. b := make([]byte, 4)
  2061. native.PutUint32(b, uint32(vrf.Table))
  2062. data.AddRtAttr(nl.IFLA_VRF_TABLE, b)
  2063. }
  2064. func parseVrfData(link Link, data []syscall.NetlinkRouteAttr) {
  2065. vrf := link.(*Vrf)
  2066. for _, datum := range data {
  2067. switch datum.Attr.Type {
  2068. case nl.IFLA_VRF_TABLE:
  2069. vrf.Table = native.Uint32(datum.Value[0:4])
  2070. }
  2071. }
  2072. }
  2073. func addBridgeAttrs(bridge *Bridge, linkInfo *nl.RtAttr) {
  2074. data := linkInfo.AddRtAttr(nl.IFLA_INFO_DATA, nil)
  2075. if bridge.MulticastSnooping != nil {
  2076. data.AddRtAttr(nl.IFLA_BR_MCAST_SNOOPING, boolToByte(*bridge.MulticastSnooping))
  2077. }
  2078. if bridge.HelloTime != nil {
  2079. data.AddRtAttr(nl.IFLA_BR_HELLO_TIME, nl.Uint32Attr(*bridge.HelloTime))
  2080. }
  2081. if bridge.VlanFiltering != nil {
  2082. data.AddRtAttr(nl.IFLA_BR_VLAN_FILTERING, boolToByte(*bridge.VlanFiltering))
  2083. }
  2084. }
  2085. func parseBridgeData(bridge Link, data []syscall.NetlinkRouteAttr) {
  2086. br := bridge.(*Bridge)
  2087. for _, datum := range data {
  2088. switch datum.Attr.Type {
  2089. case nl.IFLA_BR_HELLO_TIME:
  2090. helloTime := native.Uint32(datum.Value[0:4])
  2091. br.HelloTime = &helloTime
  2092. case nl.IFLA_BR_MCAST_SNOOPING:
  2093. mcastSnooping := datum.Value[0] == 1
  2094. br.MulticastSnooping = &mcastSnooping
  2095. case nl.IFLA_BR_VLAN_FILTERING:
  2096. vlanFiltering := datum.Value[0] == 1
  2097. br.VlanFiltering = &vlanFiltering
  2098. }
  2099. }
  2100. }
  2101. func addGTPAttrs(gtp *GTP, linkInfo *nl.RtAttr) {
  2102. data := linkInfo.AddRtAttr(nl.IFLA_INFO_DATA, nil)
  2103. data.AddRtAttr(nl.IFLA_GTP_FD0, nl.Uint32Attr(uint32(gtp.FD0)))
  2104. data.AddRtAttr(nl.IFLA_GTP_FD1, nl.Uint32Attr(uint32(gtp.FD1)))
  2105. data.AddRtAttr(nl.IFLA_GTP_PDP_HASHSIZE, nl.Uint32Attr(131072))
  2106. if gtp.Role != nl.GTP_ROLE_GGSN {
  2107. data.AddRtAttr(nl.IFLA_GTP_ROLE, nl.Uint32Attr(uint32(gtp.Role)))
  2108. }
  2109. }
  2110. func parseGTPData(link Link, data []syscall.NetlinkRouteAttr) {
  2111. gtp := link.(*GTP)
  2112. for _, datum := range data {
  2113. switch datum.Attr.Type {
  2114. case nl.IFLA_GTP_FD0:
  2115. gtp.FD0 = int(native.Uint32(datum.Value))
  2116. case nl.IFLA_GTP_FD1:
  2117. gtp.FD1 = int(native.Uint32(datum.Value))
  2118. case nl.IFLA_GTP_PDP_HASHSIZE:
  2119. gtp.PDPHashsize = int(native.Uint32(datum.Value))
  2120. case nl.IFLA_GTP_ROLE:
  2121. gtp.Role = int(native.Uint32(datum.Value))
  2122. }
  2123. }
  2124. }
  2125. func parseVfInfoList(data []syscall.NetlinkRouteAttr) ([]VfInfo, error) {
  2126. var vfs []VfInfo
  2127. for i, element := range data {
  2128. if element.Attr.Type != nl.IFLA_VF_INFO {
  2129. return nil, fmt.Errorf("Incorrect element type in vf info list: %d", element.Attr.Type)
  2130. }
  2131. vfAttrs, err := nl.ParseRouteAttr(element.Value)
  2132. if err != nil {
  2133. return nil, err
  2134. }
  2135. vfs = append(vfs, parseVfInfo(vfAttrs, i))
  2136. }
  2137. return vfs, nil
  2138. }
  2139. func parseVfInfo(data []syscall.NetlinkRouteAttr, id int) VfInfo {
  2140. vf := VfInfo{ID: id}
  2141. for _, element := range data {
  2142. switch element.Attr.Type {
  2143. case nl.IFLA_VF_MAC:
  2144. mac := nl.DeserializeVfMac(element.Value[:])
  2145. vf.Mac = mac.Mac[:6]
  2146. case nl.IFLA_VF_VLAN:
  2147. vl := nl.DeserializeVfVlan(element.Value[:])
  2148. vf.Vlan = int(vl.Vlan)
  2149. vf.Qos = int(vl.Qos)
  2150. case nl.IFLA_VF_TX_RATE:
  2151. txr := nl.DeserializeVfTxRate(element.Value[:])
  2152. vf.TxRate = int(txr.Rate)
  2153. case nl.IFLA_VF_SPOOFCHK:
  2154. sp := nl.DeserializeVfSpoofchk(element.Value[:])
  2155. vf.Spoofchk = sp.Setting != 0
  2156. case nl.IFLA_VF_LINK_STATE:
  2157. ls := nl.DeserializeVfLinkState(element.Value[:])
  2158. vf.LinkState = ls.LinkState
  2159. }
  2160. }
  2161. return vf
  2162. }
  2163. // LinkSetBondSlave add slave to bond link via ioctl interface.
  2164. func LinkSetBondSlave(link Link, master *Bond) error {
  2165. fd, err := getSocketUDP()
  2166. if err != nil {
  2167. return err
  2168. }
  2169. defer syscall.Close(fd)
  2170. ifreq := newIocltSlaveReq(link.Attrs().Name, master.Attrs().Name)
  2171. _, _, errno := syscall.Syscall(syscall.SYS_IOCTL, uintptr(fd), unix.SIOCBONDENSLAVE, uintptr(unsafe.Pointer(ifreq)))
  2172. if errno != 0 {
  2173. return fmt.Errorf("Failed to enslave %q to %q, errno=%v", link.Attrs().Name, master.Attrs().Name, errno)
  2174. }
  2175. return nil
  2176. }
  2177. // VethPeerIndex get veth peer index.
  2178. func VethPeerIndex(link *Veth) (int, error) {
  2179. fd, err := getSocketUDP()
  2180. if err != nil {
  2181. return -1, err
  2182. }
  2183. defer syscall.Close(fd)
  2184. ifreq, sSet := newIocltStringSetReq(link.Name)
  2185. _, _, errno := syscall.Syscall(syscall.SYS_IOCTL, uintptr(fd), SIOCETHTOOL, uintptr(unsafe.Pointer(ifreq)))
  2186. if errno != 0 {
  2187. return -1, fmt.Errorf("SIOCETHTOOL request for %q failed, errno=%v", link.Attrs().Name, errno)
  2188. }
  2189. gstrings := &ethtoolGstrings{
  2190. cmd: ETHTOOL_GSTRINGS,
  2191. stringSet: ETH_SS_STATS,
  2192. length: sSet.data[0],
  2193. }
  2194. ifreq.Data = uintptr(unsafe.Pointer(gstrings))
  2195. _, _, errno = syscall.Syscall(syscall.SYS_IOCTL, uintptr(fd), SIOCETHTOOL, uintptr(unsafe.Pointer(ifreq)))
  2196. if errno != 0 {
  2197. return -1, fmt.Errorf("SIOCETHTOOL request for %q failed, errno=%v", link.Attrs().Name, errno)
  2198. }
  2199. stats := &ethtoolStats{
  2200. cmd: ETHTOOL_GSTATS,
  2201. nStats: gstrings.length,
  2202. }
  2203. ifreq.Data = uintptr(unsafe.Pointer(stats))
  2204. _, _, errno = syscall.Syscall(syscall.SYS_IOCTL, uintptr(fd), SIOCETHTOOL, uintptr(unsafe.Pointer(ifreq)))
  2205. if errno != 0 {
  2206. return -1, fmt.Errorf("SIOCETHTOOL request for %q failed, errno=%v", link.Attrs().Name, errno)
  2207. }
  2208. return int(stats.data[0]), nil
  2209. }