/
cptp.go
77 lines (70 loc) · 2.23 KB
/
cptp.go
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/*
* Copyright (c) 2023 Baidu, Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the
* License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
* either express or implied. See the License for the specific language governing permissions
* and limitations under the License.
*
*/
package main
import (
"fmt"
"net"
current "github.com/containernetworking/cni/pkg/types/100"
"github.com/vishvananda/netlink"
)
// containerSet sets up the container interface
// this method is called at container network namespace
func containerSet(hostVeth, contVeth *net.Interface, pr *current.Result) error {
var err error
for _, ipc := range pr.IPs {
// Add a permanent ARP entry for the gateway
err = netlink.NeighAdd(&netlink.Neigh{
LinkIndex: contVeth.Index,
State: netlink.NUD_PERMANENT,
IP: ipc.Gateway,
HardwareAddr: func() net.HardwareAddr {
return hostVeth.HardwareAddr
}(),
})
if err != nil {
return fmt.Errorf("failed to add permanent ARP entry for the gateway %q: %v", ipc.Gateway, err)
}
}
return err
}
// hostSet sets up the host interface
// this method is called at host network namespace
func hostSet(hostVeth, contVeth *net.Interface, pr *current.Result) error {
var err error
for _, ipc := range pr.IPs {
// Add a permanent ARP entry for the gateway
err = netlink.NeighAdd(&netlink.Neigh{
LinkIndex: hostVeth.Index,
State: netlink.NUD_PERMANENT,
IP: ipc.Address.IP,
HardwareAddr: func() net.HardwareAddr {
return contVeth.HardwareAddr
}(),
})
if err != nil {
return fmt.Errorf("failed to add permanent ARP entry for the gateway %q: %v", ipc.Gateway, err)
}
}
return err
}
// AddLinkRoute adds a link-scoped route to a device.
func AddLinkRoute(ipn *net.IPNet, gw net.IP, dev netlink.Link) error {
return netlink.RouteAdd(&netlink.Route{
LinkIndex: dev.Attrs().Index,
Scope: netlink.SCOPE_LINK,
Dst: ipn,
Gw: gw,
})
}