kilo/pkg/iproute/iproute.go
Lucas Servén Marín cd6eeeb1e7
pkg/{encapsulation,mesh}: abstract encapsulation
This commit abstracts away encapsulation to more easily allow for
different types of encapsulation or compatibility with other networking
solutions.
2019-05-13 18:30:03 +02:00

89 lines
2.3 KiB
Go

// Copyright 2019 the Kilo authors
//
// 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 iproute
import (
"fmt"
"net"
"github.com/vishvananda/netlink"
)
// RemoveInterface removes an interface.
func RemoveInterface(index int) error {
link, err := netlink.LinkByIndex(index)
if err != nil {
return fmt.Errorf("failed to get link: %s", err)
}
return netlink.LinkDel(link)
}
// Set sets the interface up or down.
func Set(index int, up bool) error {
link, err := netlink.LinkByIndex(index)
if err != nil {
return fmt.Errorf("failed to get link: %s", err)
}
if up {
return netlink.LinkSetUp(link)
}
return netlink.LinkSetDown(link)
}
// SetAddress sets the IP address of an interface.
func SetAddress(index int, cidr *net.IPNet) error {
link, err := netlink.LinkByIndex(index)
if err != nil {
return fmt.Errorf("failed to get link: %s", err)
}
addrs, err := netlink.AddrList(link, netlink.FAMILY_ALL)
if err != nil {
return err
}
l := len(addrs)
for _, addr := range addrs {
if addr.IP.Equal(cidr.IP) && addr.Mask.String() == cidr.Mask.String() {
continue
}
if err := netlink.AddrDel(link, &addr); err != nil {
return fmt.Errorf("failed to delete address: %s", err)
}
l--
}
// The only address left is the desired address, so quit.
if l == 1 {
return nil
}
return netlink.AddrReplace(link, &netlink.Addr{IPNet: cidr})
}
// DeleteAddresses removes all IP addresses of an interface.
func DeleteAddresses(index int) error {
link, err := netlink.LinkByIndex(index)
if err != nil {
return fmt.Errorf("failed to get link: %s", err)
}
addrs, err := netlink.AddrList(link, netlink.FAMILY_ALL)
if err != nil {
return err
}
for _, addr := range addrs {
if err := netlink.AddrDel(link, &addr); err != nil {
return fmt.Errorf("failed to delete address: %s", err)
}
}
return nil
}