38 lines
658 B
Go
38 lines
658 B
Go
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package main
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import (
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"syscall"
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)
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var fd int
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func respond(iface string, requests chan *NDRequest) {
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fd, _ = syscall.Socket(syscall.AF_INET6, syscall.SOCK_RAW, syscall.IPPROTO_RAW)
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syscall.BindToDevice(fd, iface)
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for {
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n := <-requests
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pkt(n.srcIP, n.answeringForIP, n.mac)
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}
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}
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func pkt(srcip []byte, tgtip []byte, mac []byte) {
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v6 := newIpv6Header(emptyIpv6, srcip)
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NDPa := newNdpPacket(tgtip, mac)
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v6.addPayload(NDPa)
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response := v6.constructPacket()
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var t [16]byte
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copy(t[:], srcip)
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d := syscall.SockaddrInet6{
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Port: 0,
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Addr: t,
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}
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err := syscall.Sendto(fd, response, 0, &d)
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if err != nil {
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panic(err)
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}
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syscall.Close(fd)
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}
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