Method Ping

wgengine/userspace.go:1342–1369

(ip netip.Addr, pingType tailcfg.PingType, size int, cb func(*ipnstate.PingResult))

}

func (e *userspaceEngine) Ping(ip netip.Addr, pingType tailcfg.PingType, size int, cb func(*ipnstate.PingResult)) {
	res := &ipnstate.PingResult{IP: ip.String()}
	pip, ok := e.PeerForIP(ip)
	if !ok {
		e.logf("ping(%v): no matching peer", ip)
		res.Err = "no matching peer"
		cb(res)
		return
	}
	if pip.IsSelf {
		res.Err = fmt.Sprintf("%v is local Tailscale IP", ip)
		res.IsLocalIP = true
		cb(res)
		return
	}
	peer := pip.Node

	e.logf("ping(%v): sending %v ping to %v %v ...", ip, pingType, peer.Key().ShortString(), peer.ComputedName())
	switch pingType {
	case "disco":
		e.magicConn.Ping(peer, res, size, cb)
	case "TSMP":
		e.sendTSMPPing(ip, peer, res, cb)
		e.sendTSMPDiscoAdvertisement(ip)
	case "ICMP":
		e.sendICMPEchoRequest(ip, peer, res, cb)
	}
}

func (e *userspaceEngine) mySelfIPMatchingFamily(dst netip.Addr) (src netip.Addr, err error) {
	var zero netip.Addr