0da6780449
It's a pointer now, so we need to use the helper function to set the field and also test for nil before accessing it.
98 lines
2.7 KiB
Go
98 lines
2.7 KiB
Go
// Copyright 2015 CNI 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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package ipam
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import (
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"fmt"
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"net"
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"os"
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"github.com/containernetworking/cni/pkg/invoke"
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"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/ip"
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"github.com/vishvananda/netlink"
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)
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func ExecAdd(plugin string, netconf []byte) (types.Result, error) {
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return invoke.DelegateAdd(plugin, netconf)
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}
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func ExecDel(plugin string, netconf []byte) error {
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return invoke.DelegateDel(plugin, netconf)
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}
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// ConfigureIface takes the result of IPAM plugin and
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// applies to the ifName interface
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func ConfigureIface(ifName string, res *current.Result) error {
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if len(res.Interfaces) == 0 {
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return fmt.Errorf("no interfaces to configure")
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}
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link, err := netlink.LinkByName(ifName)
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if err != nil {
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return fmt.Errorf("failed to lookup %q: %v", ifName, err)
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}
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if err := netlink.LinkSetUp(link); err != nil {
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return fmt.Errorf("failed to set %q UP: %v", ifName, err)
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}
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var v4gw, v6gw net.IP
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for _, ipc := range res.IPs {
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if ipc.Interface == nil {
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continue
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}
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intIdx := *ipc.Interface
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if intIdx < 0 || intIdx >= len(res.Interfaces) || res.Interfaces[intIdx].Name != ifName {
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// IP address is for a different interface
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return fmt.Errorf("failed to add IP addr %v to %q: invalid interface index", ipc, ifName)
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}
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addr := &netlink.Addr{IPNet: &ipc.Address, Label: ""}
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if err = netlink.AddrAdd(link, addr); err != nil {
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return fmt.Errorf("failed to add IP addr %v to %q: %v", ipc, ifName, err)
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}
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gwIsV4 := ipc.Gateway.To4() != nil
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if gwIsV4 && v4gw == nil {
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v4gw = ipc.Gateway
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} else if !gwIsV4 && v6gw == nil {
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v6gw = ipc.Gateway
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}
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}
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for _, r := range res.Routes {
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routeIsV4 := r.Dst.IP.To4() != nil
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gw := r.GW
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if gw == nil {
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if routeIsV4 && v4gw != nil {
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gw = v4gw
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} else if !routeIsV4 && v6gw != nil {
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gw = v6gw
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}
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}
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if err = ip.AddRoute(&r.Dst, gw, link); err != nil {
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// we skip over duplicate routes as we assume the first one wins
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if !os.IsExist(err) {
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return fmt.Errorf("failed to add route '%v via %v dev %v': %v", r.Dst, gw, ifName, err)
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}
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}
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}
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return nil
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}
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