71 lines
1.8 KiB
Go
71 lines
1.8 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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