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Add a network test that sets up 2 of 4 ehternet devices, and allows another to use dhcp

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Signed-off-by: Sven Dowideit <SvenDowideit@home.org.au>
This commit is contained in:
Sven Dowideit
2017-03-10 21:53:12 +10:00
parent 00af8545d6
commit 17b3589782
56 changed files with 5092 additions and 792 deletions
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623
vendor/github.com/vishvananda/netlink/link_linux.go generated vendored
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@@ -10,9 +10,25 @@ import (
"unsafe"
"github.com/vishvananda/netlink/nl"
"github.com/vishvananda/netns"
)
const (
SizeofLinkStats32 = 0x5c
SizeofLinkStats64 = 0xd8
IFLA_STATS64 = 0x17 // syscall pkg does not contain this one
)
const (
TUNTAP_MODE_TUN TuntapMode = syscall.IFF_TUN
TUNTAP_MODE_TAP TuntapMode = syscall.IFF_TAP
TUNTAP_DEFAULTS TuntapFlag = syscall.IFF_TUN_EXCL | syscall.IFF_ONE_QUEUE
TUNTAP_VNET_HDR TuntapFlag = syscall.IFF_VNET_HDR
TUNTAP_TUN_EXCL TuntapFlag = syscall.IFF_TUN_EXCL
TUNTAP_NO_PI TuntapFlag = syscall.IFF_NO_PI
TUNTAP_ONE_QUEUE TuntapFlag = syscall.IFF_ONE_QUEUE
)
var native = nl.NativeEndian()
var lookupByDump = false
var macvlanModes = [...]uint32{
@@ -33,12 +49,65 @@ func ensureIndex(link *LinkAttrs) {
}
}
func (h *Handle) ensureIndex(link *LinkAttrs) {
if link != nil && link.Index == 0 {
newlink, _ := h.LinkByName(link.Name)
if newlink != nil {
link.Index = newlink.Attrs().Index
}
}
}
func (h *Handle) SetPromiscOn(link Link) error {
base := link.Attrs()
h.ensureIndex(base)
req := h.newNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)
msg := nl.NewIfInfomsg(syscall.AF_UNSPEC)
msg.Change = syscall.IFF_PROMISC
msg.Flags = syscall.IFF_UP
msg.Index = int32(base.Index)
req.AddData(msg)
_, err := req.Execute(syscall.NETLINK_ROUTE, 0)
return err
}
func SetPromiscOn(link Link) error {
return pkgHandle.SetPromiscOn(link)
}
func (h *Handle) SetPromiscOff(link Link) error {
base := link.Attrs()
h.ensureIndex(base)
req := h.newNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)
msg := nl.NewIfInfomsg(syscall.AF_UNSPEC)
msg.Change = syscall.IFF_PROMISC
msg.Flags = 0 & ^syscall.IFF_UP
msg.Index = int32(base.Index)
req.AddData(msg)
_, err := req.Execute(syscall.NETLINK_ROUTE, 0)
return err
}
func SetPromiscOff(link Link) error {
return pkgHandle.SetPromiscOff(link)
}
// LinkSetUp enables the link device.
// Equivalent to: `ip link set $link up`
func LinkSetUp(link Link) error {
return pkgHandle.LinkSetUp(link)
}
// LinkSetUp enables the link device.
// Equivalent to: `ip link set $link up`
func (h *Handle) LinkSetUp(link Link) error {
base := link.Attrs()
ensureIndex(base)
req := nl.NewNetlinkRequest(syscall.RTM_NEWLINK, syscall.NLM_F_ACK)
h.ensureIndex(base)
req := h.newNetlinkRequest(syscall.RTM_NEWLINK, syscall.NLM_F_ACK)
msg := nl.NewIfInfomsg(syscall.AF_UNSPEC)
msg.Change = syscall.IFF_UP
@@ -53,9 +122,15 @@ func LinkSetUp(link Link) error {
// LinkSetDown disables link device.
// Equivalent to: `ip link set $link down`
func LinkSetDown(link Link) error {
return pkgHandle.LinkSetDown(link)
}
// LinkSetDown disables link device.
// Equivalent to: `ip link set $link down`
func (h *Handle) LinkSetDown(link Link) error {
base := link.Attrs()
ensureIndex(base)
req := nl.NewNetlinkRequest(syscall.RTM_NEWLINK, syscall.NLM_F_ACK)
h.ensureIndex(base)
req := h.newNetlinkRequest(syscall.RTM_NEWLINK, syscall.NLM_F_ACK)
msg := nl.NewIfInfomsg(syscall.AF_UNSPEC)
msg.Change = syscall.IFF_UP
@@ -70,9 +145,15 @@ func LinkSetDown(link Link) error {
// LinkSetMTU sets the mtu of the link device.
// Equivalent to: `ip link set $link mtu $mtu`
func LinkSetMTU(link Link, mtu int) error {
return pkgHandle.LinkSetMTU(link, mtu)
}
// LinkSetMTU sets the mtu of the link device.
// Equivalent to: `ip link set $link mtu $mtu`
func (h *Handle) LinkSetMTU(link Link, mtu int) error {
base := link.Attrs()
ensureIndex(base)
req := nl.NewNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)
h.ensureIndex(base)
req := h.newNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)
msg := nl.NewIfInfomsg(syscall.AF_UNSPEC)
msg.Index = int32(base.Index)
@@ -91,9 +172,15 @@ func LinkSetMTU(link Link, mtu int) error {
// LinkSetName sets the name of the link device.
// Equivalent to: `ip link set $link name $name`
func LinkSetName(link Link, name string) error {
return pkgHandle.LinkSetName(link, name)
}
// LinkSetName sets the name of the link device.
// Equivalent to: `ip link set $link name $name`
func (h *Handle) LinkSetName(link Link, name string) error {
base := link.Attrs()
ensureIndex(base)
req := nl.NewNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)
h.ensureIndex(base)
req := h.newNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)
msg := nl.NewIfInfomsg(syscall.AF_UNSPEC)
msg.Index = int32(base.Index)
@@ -109,9 +196,15 @@ func LinkSetName(link Link, name string) error {
// LinkSetAlias sets the alias of the link device.
// Equivalent to: `ip link set dev $link alias $name`
func LinkSetAlias(link Link, name string) error {
return pkgHandle.LinkSetAlias(link, name)
}
// LinkSetAlias sets the alias of the link device.
// Equivalent to: `ip link set dev $link alias $name`
func (h *Handle) LinkSetAlias(link Link, name string) error {
base := link.Attrs()
ensureIndex(base)
req := nl.NewNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)
h.ensureIndex(base)
req := h.newNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)
msg := nl.NewIfInfomsg(syscall.AF_UNSPEC)
msg.Index = int32(base.Index)
@@ -127,9 +220,15 @@ func LinkSetAlias(link Link, name string) error {
// LinkSetHardwareAddr sets the hardware address of the link device.
// Equivalent to: `ip link set $link address $hwaddr`
func LinkSetHardwareAddr(link Link, hwaddr net.HardwareAddr) error {
return pkgHandle.LinkSetHardwareAddr(link, hwaddr)
}
// LinkSetHardwareAddr sets the hardware address of the link device.
// Equivalent to: `ip link set $link address $hwaddr`
func (h *Handle) LinkSetHardwareAddr(link Link, hwaddr net.HardwareAddr) error {
base := link.Attrs()
ensureIndex(base)
req := nl.NewNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)
h.ensureIndex(base)
req := h.newNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)
msg := nl.NewIfInfomsg(syscall.AF_UNSPEC)
msg.Index = int32(base.Index)
@@ -145,9 +244,15 @@ func LinkSetHardwareAddr(link Link, hwaddr net.HardwareAddr) error {
// LinkSetVfHardwareAddr sets the hardware address of a vf for the link.
// Equivalent to: `ip link set $link vf $vf mac $hwaddr`
func LinkSetVfHardwareAddr(link Link, vf int, hwaddr net.HardwareAddr) error {
return pkgHandle.LinkSetVfHardwareAddr(link, vf, hwaddr)
}
// LinkSetVfHardwareAddr sets the hardware address of a vf for the link.
// Equivalent to: `ip link set $link vf $vf mac $hwaddr`
func (h *Handle) LinkSetVfHardwareAddr(link Link, vf int, hwaddr net.HardwareAddr) error {
base := link.Attrs()
ensureIndex(base)
req := nl.NewNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)
h.ensureIndex(base)
req := h.newNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)
msg := nl.NewIfInfomsg(syscall.AF_UNSPEC)
msg.Index = int32(base.Index)
@@ -169,9 +274,15 @@ func LinkSetVfHardwareAddr(link Link, vf int, hwaddr net.HardwareAddr) error {
// LinkSetVfVlan sets the vlan of a vf for the link.
// Equivalent to: `ip link set $link vf $vf vlan $vlan`
func LinkSetVfVlan(link Link, vf, vlan int) error {
return pkgHandle.LinkSetVfVlan(link, vf, vlan)
}
// LinkSetVfVlan sets the vlan of a vf for the link.
// Equivalent to: `ip link set $link vf $vf vlan $vlan`
func (h *Handle) LinkSetVfVlan(link Link, vf, vlan int) error {
base := link.Attrs()
ensureIndex(base)
req := nl.NewNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)
h.ensureIndex(base)
req := h.newNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)
msg := nl.NewIfInfomsg(syscall.AF_UNSPEC)
msg.Index = int32(base.Index)
@@ -190,33 +301,81 @@ func LinkSetVfVlan(link Link, vf, vlan int) error {
return err
}
// LinkSetVfTxRate sets the tx rate of a vf for the link.
// Equivalent to: `ip link set $link vf $vf rate $rate`
func LinkSetVfTxRate(link Link, vf, rate int) error {
return pkgHandle.LinkSetVfTxRate(link, vf, rate)
}
// LinkSetVfTxRate sets the tx rate of a vf for the link.
// Equivalent to: `ip link set $link vf $vf rate $rate`
func (h *Handle) LinkSetVfTxRate(link Link, vf, rate int) error {
base := link.Attrs()
h.ensureIndex(base)
req := h.newNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)
msg := nl.NewIfInfomsg(syscall.AF_UNSPEC)
msg.Index = int32(base.Index)
req.AddData(msg)
data := nl.NewRtAttr(nl.IFLA_VFINFO_LIST, nil)
info := nl.NewRtAttrChild(data, nl.IFLA_VF_INFO, nil)
vfmsg := nl.VfTxRate{
Vf: uint32(vf),
Rate: uint32(rate),
}
nl.NewRtAttrChild(info, nl.IFLA_VF_TX_RATE, vfmsg.Serialize())
req.AddData(data)
_, err := req.Execute(syscall.NETLINK_ROUTE, 0)
return err
}
// LinkSetMaster sets the master of the link device.
// Equivalent to: `ip link set $link master $master`
func LinkSetMaster(link Link, master *Bridge) error {
return pkgHandle.LinkSetMaster(link, master)
}
// LinkSetMaster sets the master of the link device.
// Equivalent to: `ip link set $link master $master`
func (h *Handle) LinkSetMaster(link Link, master *Bridge) error {
index := 0
if master != nil {
masterBase := master.Attrs()
ensureIndex(masterBase)
h.ensureIndex(masterBase)
index = masterBase.Index
}
if index <= 0 {
return fmt.Errorf("Device does not exist")
}
return LinkSetMasterByIndex(link, index)
return h.LinkSetMasterByIndex(link, index)
}
// LinkSetNoMaster removes the master of the link device.
// Equivalent to: `ip link set $link nomaster`
func LinkSetNoMaster(link Link) error {
return LinkSetMasterByIndex(link, 0)
return pkgHandle.LinkSetNoMaster(link)
}
// LinkSetNoMaster removes the master of the link device.
// Equivalent to: `ip link set $link nomaster`
func (h *Handle) LinkSetNoMaster(link Link) error {
return h.LinkSetMasterByIndex(link, 0)
}
// LinkSetMasterByIndex sets the master of the link device.
// Equivalent to: `ip link set $link master $master`
func LinkSetMasterByIndex(link Link, masterIndex int) error {
return pkgHandle.LinkSetMasterByIndex(link, masterIndex)
}
// LinkSetMasterByIndex sets the master of the link device.
// Equivalent to: `ip link set $link master $master`
func (h *Handle) LinkSetMasterByIndex(link Link, masterIndex int) error {
base := link.Attrs()
ensureIndex(base)
req := nl.NewNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)
h.ensureIndex(base)
req := h.newNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)
msg := nl.NewIfInfomsg(syscall.AF_UNSPEC)
msg.Index = int32(base.Index)
@@ -236,9 +395,16 @@ func LinkSetMasterByIndex(link Link, masterIndex int) error {
// pid must be a pid of a running process.
// Equivalent to: `ip link set $link netns $pid`
func LinkSetNsPid(link Link, nspid int) error {
return pkgHandle.LinkSetNsPid(link, nspid)
}
// LinkSetNsPid puts the device into a new network namespace. The
// pid must be a pid of a running process.
// Equivalent to: `ip link set $link netns $pid`
func (h *Handle) LinkSetNsPid(link Link, nspid int) error {
base := link.Attrs()
ensureIndex(base)
req := nl.NewNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)
h.ensureIndex(base)
req := h.newNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)
msg := nl.NewIfInfomsg(syscall.AF_UNSPEC)
msg.Index = int32(base.Index)
@@ -258,9 +424,16 @@ func LinkSetNsPid(link Link, nspid int) error {
// fd must be an open file descriptor to a network namespace.
// Similar to: `ip link set $link netns $ns`
func LinkSetNsFd(link Link, fd int) error {
return pkgHandle.LinkSetNsFd(link, fd)
}
// LinkSetNsFd puts the device into a new network namespace. The
// fd must be an open file descriptor to a network namespace.
// Similar to: `ip link set $link netns $ns`
func (h *Handle) LinkSetNsFd(link Link, fd int) error {
base := link.Attrs()
ensureIndex(base)
req := nl.NewNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)
h.ensureIndex(base)
req := h.newNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)
msg := nl.NewIfInfomsg(syscall.AF_UNSPEC)
msg.Index = int32(base.Index)
@@ -276,6 +449,23 @@ func LinkSetNsFd(link Link, fd int) error {
return err
}
// LinkSetXdpFd adds a bpf function to the driver. The fd must be a bpf
// program loaded with bpf(type=BPF_PROG_TYPE_XDP)
func LinkSetXdpFd(link Link, fd int) error {
base := link.Attrs()
ensureIndex(base)
req := nl.NewNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)
msg := nl.NewIfInfomsg(syscall.AF_UNSPEC)
msg.Index = int32(base.Index)
req.AddData(msg)
addXdpAttrs(&LinkXdp{Fd: fd}, req)
_, err := req.Execute(syscall.NETLINK_ROUTE, 0)
return err
}
func boolAttr(val bool) []byte {
var v uint8
if val {
@@ -329,7 +519,7 @@ func addVxlanAttrs(vxlan *Vxlan, linkInfo *nl.RtAttr) {
nl.NewRtAttrChild(data, nl.IFLA_VXLAN_UDP_CSUM, boolAttr(vxlan.UDPCSum))
}
if vxlan.GBP {
nl.NewRtAttrChild(data, nl.IFLA_VXLAN_GBP, boolAttr(vxlan.GBP))
nl.NewRtAttrChild(data, nl.IFLA_VXLAN_GBP, []byte{})
}
if vxlan.NoAge {
nl.NewRtAttrChild(data, nl.IFLA_VXLAN_AGEING, nl.Uint32Attr(0))
@@ -340,7 +530,7 @@ func addVxlanAttrs(vxlan *Vxlan, linkInfo *nl.RtAttr) {
nl.NewRtAttrChild(data, nl.IFLA_VXLAN_LIMIT, nl.Uint32Attr(uint32(vxlan.Limit)))
}
if vxlan.Port > 0 {
nl.NewRtAttrChild(data, nl.IFLA_VXLAN_PORT, nl.Uint16Attr(uint16(vxlan.Port)))
nl.NewRtAttrChild(data, nl.IFLA_VXLAN_PORT, htons(uint16(vxlan.Port)))
}
if vxlan.PortLow > 0 || vxlan.PortHigh > 0 {
pr := vxlanPortRange{uint16(vxlan.PortLow), uint16(vxlan.PortHigh)}
@@ -434,9 +624,16 @@ func addBondAttrs(bond *Bond, linkInfo *nl.RtAttr) {
}
// LinkAdd adds a new link device. The type and features of the device
// are taken fromt the parameters in the link object.
// are taken from the parameters in the link object.
// Equivalent to: `ip link add $link`
func LinkAdd(link Link) error {
return pkgHandle.LinkAdd(link)
}
// LinkAdd adds a new link device. The type and features of the device
// are taken fromt the parameters in the link object.
// Equivalent to: `ip link add $link`
func (h *Handle) LinkAdd(link Link) error {
// TODO: set mtu and hardware address
// TODO: support extra data for macvlan
base := link.Attrs()
@@ -448,9 +645,7 @@ func LinkAdd(link Link) error {
if tuntap, ok := link.(*Tuntap); ok {
// TODO: support user
// TODO: support group
// TODO: support non- one_queue
// TODO: support pi | vnet_hdr | multi_queue
// TODO: support non- exclusive
// TODO: multi_queue
// TODO: support non- persistent
if tuntap.Mode < syscall.IFF_TUN || tuntap.Mode > syscall.IFF_TAP {
return fmt.Errorf("Tuntap.Mode %v unknown!", tuntap.Mode)
@@ -461,10 +656,13 @@ func LinkAdd(link Link) error {
}
defer file.Close()
var req ifReq
req.Flags |= syscall.IFF_ONE_QUEUE
req.Flags |= syscall.IFF_TUN_EXCL
copy(req.Name[:15], base.Name)
if tuntap.Flags == 0 {
req.Flags = uint16(TUNTAP_DEFAULTS)
} else {
req.Flags = uint16(tuntap.Flags)
}
req.Flags |= uint16(tuntap.Mode)
copy(req.Name[:15], base.Name)
_, _, errno := syscall.Syscall(syscall.SYS_IOCTL, file.Fd(), uintptr(syscall.TUNSETIFF), uintptr(unsafe.Pointer(&req)))
if errno != 0 {
return fmt.Errorf("Tuntap IOCTL TUNSETIFF failed, errno %v", errno)
@@ -473,17 +671,17 @@ func LinkAdd(link Link) error {
if errno != 0 {
return fmt.Errorf("Tuntap IOCTL TUNSETPERSIST failed, errno %v", errno)
}
ensureIndex(base)
h.ensureIndex(base)
// can't set master during create, so set it afterwards
if base.MasterIndex != 0 {
// TODO: verify MasterIndex is actually a bridge?
return LinkSetMasterByIndex(link, base.MasterIndex)
return h.LinkSetMasterByIndex(link, base.MasterIndex)
}
return nil
}
req := nl.NewNetlinkRequest(syscall.RTM_NEWLINK, syscall.NLM_F_CREATE|syscall.NLM_F_EXCL|syscall.NLM_F_ACK)
req := h.newNetlinkRequest(syscall.RTM_NEWLINK, syscall.NLM_F_CREATE|syscall.NLM_F_EXCL|syscall.NLM_F_ACK)
msg := nl.NewIfInfomsg(syscall.AF_UNSPEC)
// TODO: make it shorter
@@ -545,6 +743,10 @@ func LinkAdd(link Link) error {
req.AddData(attr)
}
if base.Xdp != nil {
addXdpAttrs(base.Xdp, req)
}
linkInfo := nl.NewRtAttr(syscall.IFLA_LINKINFO, nil)
nl.NewRtAttrChild(linkInfo, nl.IFLA_INFO_KIND, nl.NonZeroTerminated(link.Type()))
@@ -577,8 +779,19 @@ func LinkAdd(link Link) error {
data := nl.NewRtAttrChild(linkInfo, nl.IFLA_INFO_DATA, nil)
nl.NewRtAttrChild(data, nl.IFLA_MACVLAN_MODE, nl.Uint32Attr(macvlanModes[macv.Mode]))
}
} else if macv, ok := link.(*Macvtap); ok {
if macv.Mode != MACVLAN_MODE_DEFAULT {
data := nl.NewRtAttrChild(linkInfo, nl.IFLA_INFO_DATA, nil)
nl.NewRtAttrChild(data, nl.IFLA_MACVLAN_MODE, nl.Uint32Attr(macvlanModes[macv.Mode]))
}
} else if gretap, ok := link.(*Gretap); ok {
addGretapAttrs(gretap, linkInfo)
} else if iptun, ok := link.(*Iptun); ok {
addIptunAttrs(iptun, linkInfo)
} else if vti, ok := link.(*Vti); ok {
addVtiAttrs(vti, linkInfo)
} else if vrf, ok := link.(*Vrf); ok {
addVrfAttrs(vrf, linkInfo)
}
req.AddData(linkInfo)
@@ -588,12 +801,12 @@ func LinkAdd(link Link) error {
return err
}
ensureIndex(base)
h.ensureIndex(base)
// can't set master during create, so set it afterwards
if base.MasterIndex != 0 {
// TODO: verify MasterIndex is actually a bridge?
return LinkSetMasterByIndex(link, base.MasterIndex)
return h.LinkSetMasterByIndex(link, base.MasterIndex)
}
return nil
}
@@ -602,11 +815,18 @@ func LinkAdd(link Link) error {
// the link object for it to be deleted. The other values are ignored.
// Equivalent to: `ip link del $link`
func LinkDel(link Link) error {
return pkgHandle.LinkDel(link)
}
// LinkDel deletes link device. Either Index or Name must be set in
// the link object for it to be deleted. The other values are ignored.
// Equivalent to: `ip link del $link`
func (h *Handle) LinkDel(link Link) error {
base := link.Attrs()
ensureIndex(base)
h.ensureIndex(base)
req := nl.NewNetlinkRequest(syscall.RTM_DELLINK, syscall.NLM_F_ACK)
req := h.newNetlinkRequest(syscall.RTM_DELLINK, syscall.NLM_F_ACK)
msg := nl.NewIfInfomsg(syscall.AF_UNSPEC)
msg.Index = int32(base.Index)
@@ -616,8 +836,8 @@ func LinkDel(link Link) error {
return err
}
func linkByNameDump(name string) (Link, error) {
links, err := LinkList()
func (h *Handle) linkByNameDump(name string) (Link, error) {
links, err := h.LinkList()
if err != nil {
return nil, err
}
@@ -630,8 +850,8 @@ func linkByNameDump(name string) (Link, error) {
return nil, fmt.Errorf("Link %s not found", name)
}
func linkByAliasDump(alias string) (Link, error) {
links, err := LinkList()
func (h *Handle) linkByAliasDump(alias string) (Link, error) {
links, err := h.LinkList()
if err != nil {
return nil, err
}
@@ -646,11 +866,16 @@ func linkByAliasDump(alias string) (Link, error) {
// LinkByName finds a link by name and returns a pointer to the object.
func LinkByName(name string) (Link, error) {
if lookupByDump {
return linkByNameDump(name)
return pkgHandle.LinkByName(name)
}
// LinkByName finds a link by name and returns a pointer to the object.
func (h *Handle) LinkByName(name string) (Link, error) {
if h.lookupByDump {
return h.linkByNameDump(name)
}
req := nl.NewNetlinkRequest(syscall.RTM_GETLINK, syscall.NLM_F_ACK)
req := h.newNetlinkRequest(syscall.RTM_GETLINK, syscall.NLM_F_ACK)
msg := nl.NewIfInfomsg(syscall.AF_UNSPEC)
req.AddData(msg)
@@ -662,8 +887,8 @@ func LinkByName(name string) (Link, error) {
if err == syscall.EINVAL {
// older kernels don't support looking up via IFLA_IFNAME
// so fall back to dumping all links
lookupByDump = true
return linkByNameDump(name)
h.lookupByDump = true
return h.linkByNameDump(name)
}
return link, err
@@ -672,11 +897,17 @@ func LinkByName(name string) (Link, error) {
// LinkByAlias finds a link by its alias and returns a pointer to the object.
// If there are multiple links with the alias it returns the first one
func LinkByAlias(alias string) (Link, error) {
if lookupByDump {
return linkByAliasDump(alias)
return pkgHandle.LinkByAlias(alias)
}
// LinkByAlias finds a link by its alias and returns a pointer to the object.
// If there are multiple links with the alias it returns the first one
func (h *Handle) LinkByAlias(alias string) (Link, error) {
if h.lookupByDump {
return h.linkByAliasDump(alias)
}
req := nl.NewNetlinkRequest(syscall.RTM_GETLINK, syscall.NLM_F_ACK)
req := h.newNetlinkRequest(syscall.RTM_GETLINK, syscall.NLM_F_ACK)
msg := nl.NewIfInfomsg(syscall.AF_UNSPEC)
req.AddData(msg)
@@ -688,8 +919,8 @@ func LinkByAlias(alias string) (Link, error) {
if err == syscall.EINVAL {
// older kernels don't support looking up via IFLA_IFALIAS
// so fall back to dumping all links
lookupByDump = true
return linkByAliasDump(alias)
h.lookupByDump = true
return h.linkByAliasDump(alias)
}
return link, err
@@ -697,7 +928,12 @@ func LinkByAlias(alias string) (Link, error) {
// LinkByIndex finds a link by index and returns a pointer to the object.
func LinkByIndex(index int) (Link, error) {
req := nl.NewNetlinkRequest(syscall.RTM_GETLINK, syscall.NLM_F_ACK)
return pkgHandle.LinkByIndex(index)
}
// LinkByIndex finds a link by index and returns a pointer to the object.
func (h *Handle) LinkByIndex(index int) (Link, error) {
req := h.newNetlinkRequest(syscall.RTM_GETLINK, syscall.NLM_F_ACK)
msg := nl.NewIfInfomsg(syscall.AF_UNSPEC)
msg.Index = int32(index)
@@ -722,7 +958,7 @@ func execGetLink(req *nl.NetlinkRequest) (Link, error) {
return nil, fmt.Errorf("Link not found")
case len(msgs) == 1:
return linkDeserialize(msgs[0])
return LinkDeserialize(nil, msgs[0])
default:
return nil, fmt.Errorf("More than one link found")
@@ -731,7 +967,7 @@ func execGetLink(req *nl.NetlinkRequest) (Link, error) {
// linkDeserialize deserializes a raw message received from netlink into
// a link object.
func linkDeserialize(m []byte) (Link, error) {
func LinkDeserialize(hdr *syscall.NlMsghdr, m []byte) (Link, error) {
msg := nl.DeserializeIfInfomsg(m)
attrs, err := nl.ParseRouteAttr(m[msg.Len():])
@@ -739,9 +975,16 @@ func linkDeserialize(m []byte) (Link, error) {
return nil, err
}
base := LinkAttrs{Index: int(msg.Index), Flags: linkFlags(msg.Flags)}
var link Link
linkType := ""
base := LinkAttrs{Index: int(msg.Index), RawFlags: msg.Flags, Flags: linkFlags(msg.Flags), EncapType: msg.EncapType()}
if msg.Flags&syscall.IFF_PROMISC != 0 {
base.Promisc = 1
}
var (
link Link
stats32 []byte
stats64 []byte
linkType string
)
for _, attr := range attrs {
switch attr.Attr.Type {
case syscall.IFLA_LINKINFO:
@@ -776,6 +1019,12 @@ func linkDeserialize(m []byte) (Link, error) {
link = &Macvtap{}
case "gretap":
link = &Gretap{}
case "ipip":
link = &Iptun{}
case "vti":
link = &Vti{}
case "vrf":
link = &Vrf{}
default:
link = &GenericLink{LinkType: linkType}
}
@@ -799,6 +1048,12 @@ func linkDeserialize(m []byte) (Link, error) {
parseMacvtapData(link, data)
case "gretap":
parseGretapData(link, data)
case "ipip":
parseIptunData(link, data)
case "vti":
parseVtiData(link, data)
case "vrf":
parseVrfData(link, data)
}
}
}
@@ -824,8 +1079,36 @@ func linkDeserialize(m []byte) (Link, error) {
base.TxQLen = int(native.Uint32(attr.Value[0:4]))
case syscall.IFLA_IFALIAS:
base.Alias = string(attr.Value[:len(attr.Value)-1])
case syscall.IFLA_STATS:
stats32 = attr.Value[:]
case IFLA_STATS64:
stats64 = attr.Value[:]
case nl.IFLA_XDP:
xdp, err := parseLinkXdp(attr.Value[:])
if err != nil {
return nil, err
}
base.Xdp = xdp
case syscall.IFLA_PROTINFO | syscall.NLA_F_NESTED:
if hdr != nil && hdr.Type == syscall.RTM_NEWLINK &&
msg.Family == syscall.AF_BRIDGE {
attrs, err := nl.ParseRouteAttr(attr.Value[:])
if err != nil {
return nil, err
}
base.Protinfo = parseProtinfo(attrs)
}
case syscall.IFLA_OPERSTATE:
base.OperState = LinkOperState(uint8(attr.Value[0]))
}
}
if stats64 != nil {
base.Statistics = parseLinkStats64(stats64)
} else if stats32 != nil {
base.Statistics = parseLinkStats32(stats32)
}
// Links that don't have IFLA_INFO_KIND are hardware devices
if link == nil {
link = &Device{}
@@ -838,9 +1121,15 @@ func linkDeserialize(m []byte) (Link, error) {
// LinkList gets a list of link devices.
// Equivalent to: `ip link show`
func LinkList() ([]Link, error) {
return pkgHandle.LinkList()
}
// LinkList gets a list of link devices.
// Equivalent to: `ip link show`
func (h *Handle) LinkList() ([]Link, error) {
// NOTE(vish): This duplicates functionality in net/iface_linux.go, but we need
// to get the message ourselves to parse link type.
req := nl.NewNetlinkRequest(syscall.RTM_GETLINK, syscall.NLM_F_DUMP)
req := h.newNetlinkRequest(syscall.RTM_GETLINK, syscall.NLM_F_DUMP)
msg := nl.NewIfInfomsg(syscall.AF_UNSPEC)
req.AddData(msg)
@@ -852,7 +1141,7 @@ func LinkList() ([]Link, error) {
var res []Link
for _, m := range msgs {
link, err := linkDeserialize(m)
link, err := LinkDeserialize(nil, m)
if err != nil {
return nil, err
}
@@ -872,7 +1161,17 @@ type LinkUpdate struct {
// LinkSubscribe takes a chan down which notifications will be sent
// when links change. Close the 'done' chan to stop subscription.
func LinkSubscribe(ch chan<- LinkUpdate, done <-chan struct{}) error {
s, err := nl.Subscribe(syscall.NETLINK_ROUTE, syscall.RTNLGRP_LINK)
return linkSubscribe(netns.None(), netns.None(), ch, done)
}
// LinkSubscribeAt works like LinkSubscribe plus it allows the caller
// to choose the network namespace in which to subscribe (ns).
func LinkSubscribeAt(ns netns.NsHandle, ch chan<- LinkUpdate, done <-chan struct{}) error {
return linkSubscribe(ns, netns.None(), ch, done)
}
func linkSubscribe(newNs, curNs netns.NsHandle, ch chan<- LinkUpdate, done <-chan struct{}) error {
s, err := nl.SubscribeAt(newNs, curNs, syscall.NETLINK_ROUTE, syscall.RTNLGRP_LINK)
if err != nil {
return err
}
@@ -891,7 +1190,7 @@ func LinkSubscribe(ch chan<- LinkUpdate, done <-chan struct{}) error {
}
for _, m := range msgs {
ifmsg := nl.DeserializeIfInfomsg(m.Data)
link, err := linkDeserialize(m.Data)
link, err := LinkDeserialize(&m.Header, m.Data)
if err != nil {
return
}
@@ -904,33 +1203,57 @@ func LinkSubscribe(ch chan<- LinkUpdate, done <-chan struct{}) error {
}
func LinkSetHairpin(link Link, mode bool) error {
return setProtinfoAttr(link, mode, nl.IFLA_BRPORT_MODE)
return pkgHandle.LinkSetHairpin(link, mode)
}
func (h *Handle) LinkSetHairpin(link Link, mode bool) error {
return h.setProtinfoAttr(link, mode, nl.IFLA_BRPORT_MODE)
}
func LinkSetGuard(link Link, mode bool) error {
return setProtinfoAttr(link, mode, nl.IFLA_BRPORT_GUARD)
return pkgHandle.LinkSetGuard(link, mode)
}
func (h *Handle) LinkSetGuard(link Link, mode bool) error {
return h.setProtinfoAttr(link, mode, nl.IFLA_BRPORT_GUARD)
}
func LinkSetFastLeave(link Link, mode bool) error {
return setProtinfoAttr(link, mode, nl.IFLA_BRPORT_FAST_LEAVE)
return pkgHandle.LinkSetFastLeave(link, mode)
}
func (h *Handle) LinkSetFastLeave(link Link, mode bool) error {
return h.setProtinfoAttr(link, mode, nl.IFLA_BRPORT_FAST_LEAVE)
}
func LinkSetLearning(link Link, mode bool) error {
return setProtinfoAttr(link, mode, nl.IFLA_BRPORT_LEARNING)
return pkgHandle.LinkSetLearning(link, mode)
}
func (h *Handle) LinkSetLearning(link Link, mode bool) error {
return h.setProtinfoAttr(link, mode, nl.IFLA_BRPORT_LEARNING)
}
func LinkSetRootBlock(link Link, mode bool) error {
return setProtinfoAttr(link, mode, nl.IFLA_BRPORT_PROTECT)
return pkgHandle.LinkSetRootBlock(link, mode)
}
func (h *Handle) LinkSetRootBlock(link Link, mode bool) error {
return h.setProtinfoAttr(link, mode, nl.IFLA_BRPORT_PROTECT)
}
func LinkSetFlood(link Link, mode bool) error {
return setProtinfoAttr(link, mode, nl.IFLA_BRPORT_UNICAST_FLOOD)
return pkgHandle.LinkSetFlood(link, mode)
}
func setProtinfoAttr(link Link, mode bool, attr int) error {
func (h *Handle) LinkSetFlood(link Link, mode bool) error {
return h.setProtinfoAttr(link, mode, nl.IFLA_BRPORT_UNICAST_FLOOD)
}
func (h *Handle) setProtinfoAttr(link Link, mode bool, attr int) error {
base := link.Attrs()
ensureIndex(base)
req := nl.NewNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)
h.ensureIndex(base)
req := h.newNetlinkRequest(syscall.RTM_SETLINK, syscall.NLM_F_ACK)
msg := nl.NewIfInfomsg(syscall.AF_BRIDGE)
msg.Index = int32(base.Index)
@@ -989,14 +1312,14 @@ func parseVxlanData(link Link, data []syscall.NetlinkRouteAttr) {
case nl.IFLA_VXLAN_UDP_CSUM:
vxlan.UDPCSum = int8(datum.Value[0]) != 0
case nl.IFLA_VXLAN_GBP:
vxlan.GBP = int8(datum.Value[0]) != 0
vxlan.GBP = true
case nl.IFLA_VXLAN_AGEING:
vxlan.Age = int(native.Uint32(datum.Value[0:4]))
vxlan.NoAge = vxlan.Age == 0
case nl.IFLA_VXLAN_LIMIT:
vxlan.Limit = int(native.Uint32(datum.Value[0:4]))
case nl.IFLA_VXLAN_PORT:
vxlan.Port = int(native.Uint16(datum.Value[0:2]))
vxlan.Port = int(ntohs(datum.Value[0:2]))
case nl.IFLA_VXLAN_PORT_RANGE:
buf := bytes.NewBuffer(datum.Value[0:4])
var pr vxlanPortRange
@@ -1119,26 +1442,6 @@ func linkFlags(rawFlags uint32) net.Flags {
return f
}
func htonl(val uint32) []byte {
bytes := make([]byte, 4)
binary.BigEndian.PutUint32(bytes, val)
return bytes
}
func htons(val uint16) []byte {
bytes := make([]byte, 2)
binary.BigEndian.PutUint16(bytes, val)
return bytes
}
func ntohl(buf []byte) uint32 {
return binary.BigEndian.Uint32(buf)
}
func ntohs(buf []byte) uint16 {
return binary.BigEndian.Uint16(buf)
}
func addGretapAttrs(gretap *Gretap, linkInfo *nl.RtAttr) {
data := nl.NewRtAttrChild(linkInfo, nl.IFLA_INFO_DATA, nil)
@@ -1211,3 +1514,129 @@ func parseGretapData(link Link, data []syscall.NetlinkRouteAttr) {
}
}
}
func parseLinkStats32(data []byte) *LinkStatistics {
return (*LinkStatistics)((*LinkStatistics32)(unsafe.Pointer(&data[0:SizeofLinkStats32][0])).to64())
}
func parseLinkStats64(data []byte) *LinkStatistics {
return (*LinkStatistics)((*LinkStatistics64)(unsafe.Pointer(&data[0:SizeofLinkStats64][0])))
}
func addXdpAttrs(xdp *LinkXdp, req *nl.NetlinkRequest) {
attrs := nl.NewRtAttr(nl.IFLA_XDP|syscall.NLA_F_NESTED, nil)
b := make([]byte, 4)
native.PutUint32(b, uint32(xdp.Fd))
nl.NewRtAttrChild(attrs, nl.IFLA_XDP_FD, b)
req.AddData(attrs)
}
func parseLinkXdp(data []byte) (*LinkXdp, error) {
attrs, err := nl.ParseRouteAttr(data)
if err != nil {
return nil, err
}
xdp := &LinkXdp{}
for _, attr := range attrs {
switch attr.Attr.Type {
case nl.IFLA_XDP_FD:
xdp.Fd = int(native.Uint32(attr.Value[0:4]))
case nl.IFLA_XDP_ATTACHED:
xdp.Attached = attr.Value[0] != 0
}
}
return xdp, nil
}
func addIptunAttrs(iptun *Iptun, linkInfo *nl.RtAttr) {
data := nl.NewRtAttrChild(linkInfo, nl.IFLA_INFO_DATA, nil)
ip := iptun.Local.To4()
if ip != nil {
nl.NewRtAttrChild(data, nl.IFLA_IPTUN_LOCAL, []byte(ip))
}
ip = iptun.Remote.To4()
if ip != nil {
nl.NewRtAttrChild(data, nl.IFLA_IPTUN_REMOTE, []byte(ip))
}
if iptun.Link != 0 {
nl.NewRtAttrChild(data, nl.IFLA_IPTUN_LINK, nl.Uint32Attr(iptun.Link))
}
nl.NewRtAttrChild(data, nl.IFLA_IPTUN_PMTUDISC, nl.Uint8Attr(iptun.PMtuDisc))
nl.NewRtAttrChild(data, nl.IFLA_IPTUN_TTL, nl.Uint8Attr(iptun.Ttl))
nl.NewRtAttrChild(data, nl.IFLA_IPTUN_TOS, nl.Uint8Attr(iptun.Tos))
}
func parseIptunData(link Link, data []syscall.NetlinkRouteAttr) {
iptun := link.(*Iptun)
for _, datum := range data {
switch datum.Attr.Type {
case nl.IFLA_IPTUN_LOCAL:
iptun.Local = net.IP(datum.Value[0:4])
case nl.IFLA_IPTUN_REMOTE:
iptun.Remote = net.IP(datum.Value[0:4])
case nl.IFLA_IPTUN_TTL:
iptun.Ttl = uint8(datum.Value[0])
case nl.IFLA_IPTUN_TOS:
iptun.Tos = uint8(datum.Value[0])
case nl.IFLA_IPTUN_PMTUDISC:
iptun.PMtuDisc = uint8(datum.Value[0])
}
}
}
func addVtiAttrs(vti *Vti, linkInfo *nl.RtAttr) {
data := nl.NewRtAttrChild(linkInfo, nl.IFLA_INFO_DATA, nil)
ip := vti.Local.To4()
if ip != nil {
nl.NewRtAttrChild(data, nl.IFLA_VTI_LOCAL, []byte(ip))
}
ip = vti.Remote.To4()
if ip != nil {
nl.NewRtAttrChild(data, nl.IFLA_VTI_REMOTE, []byte(ip))
}
if vti.Link != 0 {
nl.NewRtAttrChild(data, nl.IFLA_VTI_LINK, nl.Uint32Attr(vti.Link))
}
nl.NewRtAttrChild(data, nl.IFLA_VTI_IKEY, htonl(vti.IKey))
nl.NewRtAttrChild(data, nl.IFLA_VTI_OKEY, htonl(vti.OKey))
}
func parseVtiData(link Link, data []syscall.NetlinkRouteAttr) {
vti := link.(*Vti)
for _, datum := range data {
switch datum.Attr.Type {
case nl.IFLA_VTI_LOCAL:
vti.Local = net.IP(datum.Value[0:4])
case nl.IFLA_VTI_REMOTE:
vti.Remote = net.IP(datum.Value[0:4])
case nl.IFLA_VTI_IKEY:
vti.IKey = ntohl(datum.Value[0:4])
case nl.IFLA_VTI_OKEY:
vti.OKey = ntohl(datum.Value[0:4])
}
}
}
func addVrfAttrs(vrf *Vrf, linkInfo *nl.RtAttr) {
data := nl.NewRtAttrChild(linkInfo, nl.IFLA_INFO_DATA, nil)
b := make([]byte, 4)
native.PutUint32(b, uint32(vrf.Table))
nl.NewRtAttrChild(data, nl.IFLA_VRF_TABLE, b)
}
func parseVrfData(link Link, data []syscall.NetlinkRouteAttr) {
vrf := link.(*Vrf)
for _, datum := range data {
switch datum.Attr.Type {
case nl.IFLA_VRF_TABLE:
vrf.Table = native.Uint32(datum.Value[0:4])
}
}
}