func (n *networkNamespace) AddNeighbor(dstIP net.IP, dstMac net.HardwareAddr, options ...NeighOption) error {
nh := n.findNeighbor(dstIP, dstMac)
if nh != nil {
// If it exists silently return
return nil
}
nh = &neigh{
dstIP: dstIP,
dstMac: dstMac,
}
nh.processNeighOptions(options...)
if nh.linkName != "" {
nh.linkDst = n.findDst(nh.linkName, false)
if nh.linkDst == "" {
return fmt.Errorf("could not find the interface with name %s", nh.linkName)
}
}
return nsInvoke(n.nsPath(), func(nsFD int) error { return nil }, func(callerFD int) error {
var iface netlink.Link
if nh.linkDst != "" {
var err error
iface, err = netlink.LinkByName(nh.linkDst)
if err != nil {
return fmt.Errorf("could not find interface with destination name %s: %v",
nh.linkDst, err)
}
}
nlnh := &netlink.Neigh{
IP: dstIP,
HardwareAddr: dstMac,
State: netlink.NUD_PERMANENT,
Family: nh.family,
}
if nlnh.Family > 0 {
nlnh.Flags = netlink.NTF_SELF
}
if nh.linkDst != "" {
nlnh.LinkIndex = iface.Attrs().Index
}
if err := netlink.NeighSet(nlnh); err != nil {
return fmt.Errorf("could not add neighbor entry: %v", err)
}
n.neighbors = append(n.neighbors, nh)
return nil
})
}
func (dev *vxlanDevice) AddL3(n neigh) error {
log.Infof("calling NeighSet: %v, %v", n.IP, n.MAC)
return netlink.NeighSet(&netlink.Neigh{
LinkIndex: dev.link.Index,
State: netlink.NUD_PERMANENT,
Type: syscall.RTN_UNICAST,
IP: n.IP.ToIP(),
HardwareAddr: n.MAC,
})
}
func (*nl) SetNeigh(neigh *netlink.Neigh) error {
return netlink.NeighSet(neigh)
}
