cd6eeeb1e7
This commit abstracts away encapsulation to more easily allow for different types of encapsulation or compatibility with other networking solutions.
89 lines
2.3 KiB
Go
89 lines
2.3 KiB
Go
// Copyright 2019 the Kilo 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 iproute
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import (
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"fmt"
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"net"
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"github.com/vishvananda/netlink"
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)
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// RemoveInterface removes an interface.
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func RemoveInterface(index int) error {
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link, err := netlink.LinkByIndex(index)
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if err != nil {
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return fmt.Errorf("failed to get link: %s", err)
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}
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return netlink.LinkDel(link)
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}
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// Set sets the interface up or down.
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func Set(index int, up bool) error {
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link, err := netlink.LinkByIndex(index)
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if err != nil {
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return fmt.Errorf("failed to get link: %s", err)
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}
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if up {
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return netlink.LinkSetUp(link)
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}
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return netlink.LinkSetDown(link)
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}
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// SetAddress sets the IP address of an interface.
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func SetAddress(index int, cidr *net.IPNet) error {
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link, err := netlink.LinkByIndex(index)
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if err != nil {
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return fmt.Errorf("failed to get link: %s", err)
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}
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addrs, err := netlink.AddrList(link, netlink.FAMILY_ALL)
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if err != nil {
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return err
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}
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l := len(addrs)
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for _, addr := range addrs {
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if addr.IP.Equal(cidr.IP) && addr.Mask.String() == cidr.Mask.String() {
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continue
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}
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if err := netlink.AddrDel(link, &addr); err != nil {
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return fmt.Errorf("failed to delete address: %s", err)
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}
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l--
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}
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// The only address left is the desired address, so quit.
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if l == 1 {
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return nil
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}
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return netlink.AddrReplace(link, &netlink.Addr{IPNet: cidr})
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}
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// DeleteAddresses removes all IP addresses of an interface.
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func DeleteAddresses(index int) error {
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link, err := netlink.LinkByIndex(index)
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if err != nil {
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return fmt.Errorf("failed to get link: %s", err)
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}
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addrs, err := netlink.AddrList(link, netlink.FAMILY_ALL)
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if err != nil {
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return err
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}
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for _, addr := range addrs {
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if err := netlink.AddrDel(link, &addr); err != nil {
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return fmt.Errorf("failed to delete address: %s", err)
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}
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}
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return nil
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}
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