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interface_linux.go
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interface_linux.go
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//go:build linux
package link
import (
"fmt"
"net"
"os"
"github.com/pkg/errors"
"github.com/vishvananda/netlink"
"k8s.io/klog/v2"
)
// GetDeviceNumber get interface device number by mac address
func GetDeviceNumber(mac string) (int32, error) {
linkList, err := netlink.LinkList()
if err != nil {
return 0, fmt.Errorf("error get link list from netlink, %w", err)
}
for _, link := range linkList {
// ignore virtual nic type. eg. ipvlan veth bridge
if _, ok := link.(*netlink.Device); !ok {
continue
}
if link.Attrs().HardwareAddr.String() == mac {
return int32(link.Attrs().Index), nil
}
}
return 0, errors.Wrapf(ErrNotFound, "can't found dev by mac %s", mac)
}
// DeleteIPRulesByIP delete all ip rule related to the addr
func DeleteIPRulesByIP(addr *net.IPNet) error {
family := netlink.FAMILY_V4
if addr.IP.To4() == nil {
family = netlink.FAMILY_V6
}
rules, err := netlink.RuleList(family)
if err != nil {
return err
}
for _, r := range rules {
if ipNetEqual(addr, r.Src) || ipNetEqual(addr, r.Dst) {
klog.Infof("del ip rule %s", r.String())
err := netlink.RuleDel(&r)
if err == nil {
continue
}
if os.IsNotExist(err) {
// keep the old behave
r.IifName = ""
_ = netlink.RuleDel(&r)
}
return err
}
}
return nil
}
// DeleteRouteByIP delete all route related to the addr
func DeleteRouteByIP(addr *net.IPNet) error {
family := netlink.FAMILY_V4
if addr.IP.To4() == nil {
family = netlink.FAMILY_V6
}
routes, err := netlink.RouteList(nil, family)
if err != nil {
return err
}
for _, r := range routes {
if r.Dst != nil && r.Dst.IP.Equal(addr.IP) {
klog.Infof("del route %s", r.String())
err := netlink.RouteDel(&r)
if err != nil {
return err
}
}
}
return nil
}