Method mySelfIPMatchingFamily

wgengine/userspace.go:1371–1388

(dst netip.Addr)

}

func (e *userspaceEngine) mySelfIPMatchingFamily(dst netip.Addr) (src netip.Addr, err error) {
	var zero netip.Addr
	e.mu.Lock()
	defer e.mu.Unlock()
	if e.netMap == nil {
		return zero, errors.New("no netmap")
	}
	addrs := e.netMap.GetAddresses()
	if addrs.Len() == 0 {
		return zero, errors.New("no self address in netmap")
	}
	for _, p := range addrs.All() {
		if p.IsSingleIP() && p.Addr().BitLen() == dst.BitLen() {
			return p.Addr(), nil
		}
	}
	return zero, errors.New("no self address in netmap matching address family")
}

func (e *userspaceEngine) sendICMPEchoRequest(destIP netip.Addr, peer tailcfg.NodeView, res *ipnstate.PingResult, cb func(*ipnstate.PingResult)) {
	srcIP, err := e.mySelfIPMatchingFamily(destIP)