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Diffstat (limited to 'vendor/github.com/vishvananda/netlink/neigh_linux.go')
-rw-r--r--vendor/github.com/vishvananda/netlink/neigh_linux.go189
1 files changed, 161 insertions, 28 deletions
diff --git a/vendor/github.com/vishvananda/netlink/neigh_linux.go b/vendor/github.com/vishvananda/netlink/neigh_linux.go
index f75c22649..cb3b55d35 100644
--- a/vendor/github.com/vishvananda/netlink/neigh_linux.go
+++ b/vendor/github.com/vishvananda/netlink/neigh_linux.go
@@ -1,10 +1,13 @@
package netlink
import (
+ "fmt"
"net"
+ "syscall"
"unsafe"
"github.com/vishvananda/netlink/nl"
+ "github.com/vishvananda/netns"
"golang.org/x/sys/unix"
)
@@ -18,7 +21,10 @@ const (
NDA_PORT
NDA_VNI
NDA_IFINDEX
- NDA_MAX = NDA_IFINDEX
+ NDA_MASTER
+ NDA_LINK_NETNSID
+ NDA_SRC_VNI
+ NDA_MAX = NDA_SRC_VNI
)
// Neighbor Cache Entry States.
@@ -43,6 +49,7 @@ const (
NTF_ROUTER = 0x80
)
+// Ndmsg is for adding, removing or receiving information about a neighbor table entry
type Ndmsg struct {
Family uint8
Index uint32
@@ -170,45 +177,58 @@ func neighHandle(neigh *Neigh, req *nl.NetlinkRequest) error {
req.AddData(vniData)
}
+ if neigh.MasterIndex != 0 {
+ masterData := nl.NewRtAttr(NDA_MASTER, nl.Uint32Attr(uint32(neigh.MasterIndex)))
+ req.AddData(masterData)
+ }
+
_, err := req.Execute(unix.NETLINK_ROUTE, 0)
return err
}
-// NeighList gets a list of IP-MAC mappings in the system (ARP table).
+// NeighList returns a list of IP-MAC mappings in the system (ARP table).
// Equivalent to: `ip neighbor show`.
// The list can be filtered by link and ip family.
func NeighList(linkIndex, family int) ([]Neigh, error) {
return pkgHandle.NeighList(linkIndex, family)
}
-// NeighProxyList gets a list of neighbor proxies in the system.
+// NeighProxyList returns a list of neighbor proxies in the system.
// Equivalent to: `ip neighbor show proxy`.
// The list can be filtered by link and ip family.
func NeighProxyList(linkIndex, family int) ([]Neigh, error) {
return pkgHandle.NeighProxyList(linkIndex, family)
}
-// NeighList gets a list of IP-MAC mappings in the system (ARP table).
+// NeighList returns a list of IP-MAC mappings in the system (ARP table).
// Equivalent to: `ip neighbor show`.
// The list can be filtered by link and ip family.
func (h *Handle) NeighList(linkIndex, family int) ([]Neigh, error) {
- return h.neighList(linkIndex, family, 0)
+ return h.NeighListExecute(Ndmsg{
+ Family: uint8(family),
+ Index: uint32(linkIndex),
+ })
}
-// NeighProxyList gets a list of neighbor proxies in the system.
+// NeighProxyList returns a list of neighbor proxies in the system.
// Equivalent to: `ip neighbor show proxy`.
// The list can be filtered by link, ip family.
func (h *Handle) NeighProxyList(linkIndex, family int) ([]Neigh, error) {
- return h.neighList(linkIndex, family, NTF_PROXY)
+ return h.NeighListExecute(Ndmsg{
+ Family: uint8(family),
+ Index: uint32(linkIndex),
+ Flags: NTF_PROXY,
+ })
+}
+
+// NeighListExecute returns a list of neighbour entries filtered by link, ip family, flag and state.
+func NeighListExecute(msg Ndmsg) ([]Neigh, error) {
+ return pkgHandle.NeighListExecute(msg)
}
-func (h *Handle) neighList(linkIndex, family, flags int) ([]Neigh, error) {
+// NeighListExecute returns a list of neighbour entries filtered by link, ip family, flag and state.
+func (h *Handle) NeighListExecute(msg Ndmsg) ([]Neigh, error) {
req := h.newNetlinkRequest(unix.RTM_GETNEIGH, unix.NLM_F_DUMP)
- msg := Ndmsg{
- Family: uint8(family),
- Index: uint32(linkIndex),
- Flags: uint8(flags),
- }
req.AddData(&msg)
msgs, err := req.Execute(unix.NETLINK_ROUTE, unix.RTM_NEWNEIGH)
@@ -219,7 +239,7 @@ func (h *Handle) neighList(linkIndex, family, flags int) ([]Neigh, error) {
var res []Neigh
for _, m := range msgs {
ndm := deserializeNdmsg(m)
- if linkIndex != 0 && int(ndm.Index) != linkIndex {
+ if msg.Index != 0 && ndm.Index != msg.Index {
// Ignore messages from other interfaces
continue
}
@@ -251,14 +271,6 @@ func NeighDeserialize(m []byte) (*Neigh, error) {
return nil, err
}
- // This should be cached for perfomance
- // once per table dump
- link, err := LinkByIndex(neigh.LinkIndex)
- if err != nil {
- return nil, err
- }
- encapType := link.Attrs().EncapType
-
for _, attr := range attrs {
switch attr.Attr.Type {
case NDA_DST:
@@ -268,13 +280,16 @@ func NeighDeserialize(m []byte) (*Neigh, error) {
// #define RTA_LENGTH(len) (RTA_ALIGN(sizeof(struct rtattr)) + (len))
// #define RTA_PAYLOAD(rta) ((int)((rta)->rta_len) - RTA_LENGTH(0))
attrLen := attr.Attr.Len - unix.SizeofRtAttr
- if attrLen == 4 && (encapType == "ipip" ||
- encapType == "sit" ||
- encapType == "gre") {
+ if attrLen == 4 {
neigh.LLIPAddr = net.IP(attr.Value)
- } else if attrLen == 16 &&
- encapType == "tunnel6" {
- neigh.IP = net.IP(attr.Value)
+ } else if attrLen == 16 {
+ // Can be IPv6 or FireWire HWAddr
+ link, err := LinkByIndex(neigh.LinkIndex)
+ if err == nil && link.Attrs().EncapType == "tunnel6" {
+ neigh.IP = net.IP(attr.Value)
+ } else {
+ neigh.HardwareAddr = net.HardwareAddr(attr.Value)
+ }
} else {
neigh.HardwareAddr = net.HardwareAddr(attr.Value)
}
@@ -282,8 +297,126 @@ func NeighDeserialize(m []byte) (*Neigh, error) {
neigh.Vlan = int(native.Uint16(attr.Value[0:2]))
case NDA_VNI:
neigh.VNI = int(native.Uint32(attr.Value[0:4]))
+ case NDA_MASTER:
+ neigh.MasterIndex = int(native.Uint32(attr.Value[0:4]))
}
}
return &neigh, nil
}
+
+// NeighSubscribe takes a chan down which notifications will be sent
+// when neighbors are added or deleted. Close the 'done' chan to stop subscription.
+func NeighSubscribe(ch chan<- NeighUpdate, done <-chan struct{}) error {
+ return neighSubscribeAt(netns.None(), netns.None(), ch, done, nil, false)
+}
+
+// NeighSubscribeAt works like NeighSubscribe plus it allows the caller
+// to choose the network namespace in which to subscribe (ns).
+func NeighSubscribeAt(ns netns.NsHandle, ch chan<- NeighUpdate, done <-chan struct{}) error {
+ return neighSubscribeAt(ns, netns.None(), ch, done, nil, false)
+}
+
+// NeighSubscribeOptions contains a set of options to use with
+// NeighSubscribeWithOptions.
+type NeighSubscribeOptions struct {
+ Namespace *netns.NsHandle
+ ErrorCallback func(error)
+ ListExisting bool
+}
+
+// NeighSubscribeWithOptions work like NeighSubscribe but enable to
+// provide additional options to modify the behavior. Currently, the
+// namespace can be provided as well as an error callback.
+func NeighSubscribeWithOptions(ch chan<- NeighUpdate, done <-chan struct{}, options NeighSubscribeOptions) error {
+ if options.Namespace == nil {
+ none := netns.None()
+ options.Namespace = &none
+ }
+ return neighSubscribeAt(*options.Namespace, netns.None(), ch, done, options.ErrorCallback, options.ListExisting)
+}
+
+func neighSubscribeAt(newNs, curNs netns.NsHandle, ch chan<- NeighUpdate, done <-chan struct{}, cberr func(error), listExisting bool) error {
+ s, err := nl.SubscribeAt(newNs, curNs, unix.NETLINK_ROUTE, unix.RTNLGRP_NEIGH)
+ makeRequest := func(family int) error {
+ req := pkgHandle.newNetlinkRequest(unix.RTM_GETNEIGH,
+ unix.NLM_F_DUMP)
+ infmsg := nl.NewIfInfomsg(family)
+ req.AddData(infmsg)
+ if err := s.Send(req); err != nil {
+ return err
+ }
+ return nil
+ }
+ if err != nil {
+ return err
+ }
+ if done != nil {
+ go func() {
+ <-done
+ s.Close()
+ }()
+ }
+ if listExisting {
+ if err := makeRequest(unix.AF_UNSPEC); err != nil {
+ return err
+ }
+ // We have to wait for NLMSG_DONE before making AF_BRIDGE request
+ }
+ go func() {
+ defer close(ch)
+ for {
+ msgs, from, err := s.Receive()
+ if err != nil {
+ if cberr != nil {
+ cberr(err)
+ }
+ return
+ }
+ if from.Pid != nl.PidKernel {
+ if cberr != nil {
+ cberr(fmt.Errorf("Wrong sender portid %d, expected %d", from.Pid, nl.PidKernel))
+ }
+ continue
+ }
+ for _, m := range msgs {
+ if m.Header.Type == unix.NLMSG_DONE {
+ if listExisting {
+ // This will be called after handling AF_UNSPEC
+ // list request, we have to wait for NLMSG_DONE
+ // before making another request
+ if err := makeRequest(unix.AF_BRIDGE); err != nil {
+ if cberr != nil {
+ cberr(err)
+ }
+ return
+ }
+ listExisting = false
+ }
+ continue
+ }
+ if m.Header.Type == unix.NLMSG_ERROR {
+ native := nl.NativeEndian()
+ error := int32(native.Uint32(m.Data[0:4]))
+ if error == 0 {
+ continue
+ }
+ if cberr != nil {
+ cberr(syscall.Errno(-error))
+ }
+ return
+ }
+ neigh, err := NeighDeserialize(m.Data)
+ if err != nil {
+ if cberr != nil {
+ cberr(err)
+ }
+ return
+ }
+ ch <- NeighUpdate{Type: m.Header.Type, Neigh: *neigh}
+ }
+ }
+ }()
+
+ return nil
+}
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-09-24 20:32:48 +0000