forked from github/multus-cni
63 lines
1.8 KiB
Go
63 lines
1.8 KiB
Go
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// Copyright (c) 2019 Multus Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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package netutils
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import (
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"github.com/containernetworking/cni/pkg/skel"
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cnitypes "github.com/containernetworking/cni/pkg/types"
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"github.com/containernetworking/cni/pkg/types/current"
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"github.com/containernetworking/plugins/pkg/ns"
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"github.com/intel/multus-cni/logging"
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"github.com/vishvananda/netlink"
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)
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// DeleteDefaultGW removes the default gateway from marked interfaces.
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func DeleteDefaultGW(args *skel.CmdArgs, ifName string, res *cnitypes.Result) (*current.Result, error) {
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logging.Debugf("XXX: DeleteDefaultGW: %s", args.Netns)
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result, err := current.NewResultFromResult(*res)
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if err != nil {
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return nil, logging.Errorf("XXX: %v", err)
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}
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netns, err := ns.GetNS(args.Netns)
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if err != nil {
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return nil, logging.Errorf("XXX: %v", err)
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}
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defer netns.Close()
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err = netns.Do(func(_ ns.NetNS) error {
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var err error
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link, _ := netlink.LinkByName(ifName)
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routes, _ := netlink.RouteList(link, netlink.FAMILY_ALL)
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for _, nlroute := range routes {
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if nlroute.Dst == nil {
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err = netlink.RouteDel(&nlroute)
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}
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}
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return err
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})
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var newRoutes []*cnitypes.Route
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for _, route := range result.Routes {
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if mask, _ := route.Dst.Mask.Size(); mask != 0 {
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newRoutes = append(newRoutes, route)
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}
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}
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result.Routes = newRoutes
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return result, err
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}
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