@@ -6,8 +6,8 @@

 package netutils

 import (

-	"fmt"

 	"net"

+	"os"

 	"strings"

 	"github.com/docker/docker/libnetwork/ipamutils"

@@ -18,9 +18,7 @@ import (

 	"github.com/vishvananda/netlink"

 )

-var (

-	networkGetRoutesFct func(netlink.Link, int) ([]netlink.Route, error)

-)

+var networkGetRoutesFct func(netlink.Link, int) ([]netlink.Route, error)

 // CheckRouteOverlaps checks whether the passed network overlaps with any existing routes

 func CheckRouteOverlaps(toCheck *net.IPNet) error {

@@ -110,8 +108,8 @@ func FindAvailableNetwork(list []*net.IPNet) (*net.IPNet, error) {

 	// can't read /etc/resolv.conf. So instead we skip the append if resolvConf

 	// is nil. It either doesn't exist, or we can't read it for some reason.

 	var nameservers []string

-	if rc, err := resolvconf.Get(); err == nil {

-		nameservers = resolvconf.GetNameserversAsCIDR(rc.Content)

+	if rc, err := os.ReadFile(resolvconf.Path()); err == nil {

+		nameservers = resolvconf.GetNameserversAsCIDR(rc)

 	}

 	for _, nw := range list {

 		if err := CheckNameserverOverlaps(nameservers, nw); err == nil {

@@ -120,5 +118,5 @@ func FindAvailableNetwork(list []*net.IPNet) (*net.IPNet, error) {

 			}

 		}

 	}

-	return nil, fmt.Errorf("no available network")

+	return nil, errors.New("no available network")

 }

@@ -18,7 +18,7 @@ func ElectInterfaceAddresses(name string) ([]*net.IPNet, []*net.IPNet, error) {

 // FindAvailableNetwork returns a network from the passed list which does not

 // overlap with existing interfaces in the system

-

+//

 // TODO : Use appropriate windows APIs to identify non-overlapping subnets

 func FindAvailableNetwork(list []*net.IPNet) (*net.IPNet, error) {

 	return nil, nil