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package ip
import (
"fmt"
"net"
"github.com/vishvananda/netlink"
"golang.org/x/sys/unix"
)
// NeighProxy represents arguments for neighbour proxy manipulation.
type NeighProxy struct {
DevName string
Addr net.IP
}
// Show list neighbour proxy entries.
func (n *NeighProxy) Show() ([]NeighProxy, error) {
link, err := linkByName(n.DevName)
if err != nil {
return nil, err
}
list, err := netlink.NeighProxyList(link.Attrs().Index, netlink.FAMILY_ALL)
if err != nil {
return nil, fmt.Errorf("Failed to get neighbour proxies for link %q: %w", n.DevName, err)
}
entries := make([]NeighProxy, 0, len(list))
for _, neigh := range list {
entries = append(entries, NeighProxy{
DevName: n.DevName,
Addr: neigh.IP,
})
}
return entries, nil
}
func (n *NeighProxy) netlinkNeigh() (*netlink.Neigh, error) {
link, err := linkByName(n.DevName)
if err != nil {
return nil, err
}
return &netlink.Neigh{
LinkIndex: link.Attrs().Index,
Flags: unix.NTF_PROXY,
IP: n.Addr,
}, nil
}
// Add a neighbour proxy entry.
func (n *NeighProxy) Add() error {
neigh, err := n.netlinkNeigh()
if err != nil {
return err
}
err = netlink.NeighAdd(neigh)
if err != nil {
return fmt.Errorf("Failed to add neighbour proxy %v: %w", neigh, err)
}
return nil
}
// Delete a neighbour proxy entry.
func (n *NeighProxy) Delete() error {
neigh, err := n.netlinkNeigh()
if err != nil {
return err
}
err = netlink.NeighDel(neigh)
if err != nil {
return fmt.Errorf("Failed to delete neighbour proxy %v: %w", neigh, err)
}
return nil
}
|
