func getIfaceAddrs(iface *net.Interface) ([]netlink.Addr, error) {
link := &netlink.Device{
netlink.LinkAttrs{
Index: iface.Index,
},
}
return netlink.AddrList(link, syscall.AF_INET)
}
// sets IP4 addr on link removing any existing ones first
func setAddr4(link *netlink.Vxlan, ipn *net.IPNet) error {
addrs, err := netlink.AddrList(link, syscall.AF_INET)
if err != nil {
return err
}
for _, addr := range addrs {
if err = netlink.AddrDel(link, &addr); err != nil {
return fmt.Errorf("failed to delete IPv4 addr %s from %s", addr.String(), link.Attrs().Name)
}
}
addr := netlink.Addr{ipn, ""}
if err = netlink.AddrAdd(link, &addr); err != nil {
return fmt.Errorf("failed to add IP address %s to %s: %s", ipn.String(), link.Attrs().Name, err)
}
return nil
}
