67 lines
1.4 KiB
Go
67 lines
1.4 KiB
Go
/*
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Copyright © 2026 Masato Kikuchi <m-kikuchi@neody.ad.jp>
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*/
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package utils
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import (
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"encoding/binary"
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"net"
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"github.com/vishvananda/netlink"
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"github.com/vishvananda/netlink/nl"
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"golang.org/x/sys/unix"
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)
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const (
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IFLA_ETHERIP6_UNSPEC = iota
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IFLA_ETHERIP6_LOCAL
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IFLA_ETHERIP6_REMOTE
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IFLA_ETHERIP6_LINK
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IFLA_ETHERIP6_HOP_LIMIT
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)
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func u32(v uint32) []byte {
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b := make([]byte, 4)
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binary.NativeEndian.PutUint32(b, v)
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return b
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}
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func AddDev(DevName string, local net.IP, remote net.IP, linkName string) error {
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req := nl.NewNetlinkRequest(
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unix.RTM_NEWLINK,
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unix.NLM_F_REQUEST|unix.NLM_F_CREATE|unix.NLM_F_EXCL|unix.NLM_F_ACK,
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)
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msg := nl.NewIfInfomsg(unix.AF_UNSPEC)
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req.AddData(msg)
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req.AddData(nl.NewRtAttr(unix.IFLA_IFNAME, []byte(DevName)))
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linkInfo := nl.NewRtAttr(unix.IFLA_LINKINFO, nil)
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linkInfo.AddRtAttr(nl.IFLA_INFO_KIND, nl.ZeroTerminated("etherip6"))
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infoData := nl.NewRtAttr(nl.IFLA_INFO_DATA, nil)
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infoData.AddRtAttr(IFLA_ETHERIP6_LOCAL, local.To16())
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infoData.AddRtAttr(IFLA_ETHERIP6_REMOTE, remote.To16())
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if linkName != "" {
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link, err := netlink.LinkByName(linkName)
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if err != nil {
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return err
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}
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infoData.AddRtAttr(IFLA_ETHERIP6_LINK, u32(uint32(link.Attrs().Index)))
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}
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infoData.AddRtAttr(IFLA_ETHERIP6_HOP_LIMIT, []byte{255})
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linkInfo.AddRtAttr(nl.IFLA_INFO_DATA, infoData.Serialize())
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req.AddData(linkInfo)
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_, err := req.Execute(unix.NETLINK_ROUTE, 0)
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if err != nil {
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return err
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}
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return nil
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} |