func (i *IPAllocator) getIPMap() (map[string]struct{}, error) {
// get the neighbors
var (
list []netlink.Neigh
err error
)
if i.IPNet.IP.To4() == nil {
list, err = netlink.NeighList(i.Bridge.Index, netlink.FAMILY_V6)
if err != nil {
return nil, fmt.Errorf("Cannot retrieve IPv6 neighbor information for interface %s: %v", i.Bridge.Name, err)
}
} else {
list, err = netlink.NeighList(i.Bridge.Index, netlink.FAMILY_V4)
if err != nil {
return nil, fmt.Errorf("Cannot retrieve IPv4 neighbor information for interface %s: %v", i.Bridge.Name, err)
}
}
ipMap := map[string]struct{}{}
for _, entry := range list {
ipMap[entry.String()] = struct{}{}
}
return ipMap, nil
}
func GetIPv6LinkLocalNeighborAddress(ifname string) (string, error) {
ifi, err := net.InterfaceByName(ifname)
if err != nil {
return "", err
}
neighs, err := netlink.NeighList(ifi.Index, netlink.FAMILY_V6)
if err != nil {
return "", err
}
cnt := 0
var addr net.IP
for _, neigh := range neighs {
local, err := isLocalLinkLocalAddress(ifi.Index, neigh.IP)
if err != nil {
return "", err
}
if neigh.IP.IsLinkLocalUnicast() && !local {
addr = neigh.IP
cnt += 1
}
}
if cnt == 0 {
return "", fmt.Errorf("no ipv6 link-local neighbor found")
} else if cnt > 1 {
return "", fmt.Errorf("found %d link-local neighbors. only support p2p link", cnt)
}
return fmt.Sprintf("%s%%%s", addr, ifname), nil
}
func getMacAddresses(iface string) ([]string, error) {
br0, err := netlink.LinkByName(iface)
if err != nil {
return nil, fmt.Errorf("%s is not configured on this host", iface)
}
neighbors, err := netlink.NeighList(br0.Attrs().Index, 0)
if err != nil {
return nil, fmt.Errorf("neighbor list could not be retrieved")
}
hwAddrs := []string{}
for _, n := range neighbors {
hwAddrs = append(hwAddrs, n.HardwareAddr.String())
}
return hwAddrs, nil
}
func getIPAddressFromMac(macAddr, iface string) net.IP {
br0, err := netlink.LinkByName(iface)
if err != nil {
return nil
}
neighbors, err := netlink.NeighList(br0.Attrs().Index, 0)
if err != nil {
return nil
}
for _, n := range neighbors {
if n.HardwareAddr.String() == macAddr {
return n.IP
}
}
return nil
}
func (dev *vxlanDevice) GetL2List() ([]netlink.Neigh, error) {
log.Infof("calling GetL2List() dev.link.Index: %d ", dev.link.Index)
return netlink.NeighList(dev.link.Index, syscall.AF_BRIDGE)
}