0becca2e96
CNI is developed by more than just CoreOS, Inc and the copyright is retained by all CNI contributors (for their respective contributed code).
75 lines
2.2 KiB
Go
75 lines
2.2 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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"os"
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"github.com/appc/cni/pkg/invoke"
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"github.com/appc/cni/pkg/ip"
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"github.com/appc/cni/pkg/types"
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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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if os.Getenv("CNI_COMMAND") != "ADD" {
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return nil, fmt.Errorf("CNI_COMMAND is not ADD")
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}
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return invoke.ExecPluginWithResult(invoke.Find(plugin), netconf, invoke.ArgsFromEnv())
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}
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func ExecDel(plugin string, netconf []byte) error {
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if os.Getenv("CNI_COMMAND") != "DEL" {
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return fmt.Errorf("CNI_COMMAND is not DEL")
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}
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return invoke.ExecPluginWithoutResult(invoke.Find(plugin), netconf, invoke.ArgsFromEnv())
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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 *types.Result) error {
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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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// TODO(eyakubovich): IPv6
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addr := &netlink.Addr{IPNet: &res.IP4.IP, 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 to %q: %v", ifName, err)
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}
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for _, r := range res.IP4.Routes {
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gw := r.GW
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if gw == nil {
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gw = res.IP4.Gateway
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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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