Method patchifyPeer

control/controlclient/map.go:962–974

patchifyPeer returns a *tailcfg.PeerChange of the session's existing copy of the n.ID Node to n. It returns ok=false if a patch can't be made, (V, ok) on a delta, or (nil, true) if all the fields were identical (a zero change).

(n *tailcfg.Node, onFalse func(string))

// It returns ok=false if a patch can't be made, (V, ok) on a delta, or (nil,
// true) if all the fields were identical (a zero change).
func (ms *mapSession) patchifyPeer(n *tailcfg.Node, onFalse func(string)) (_ *tailcfg.PeerChange, ok bool) {
	ms.peersMu.RLock()
	defer ms.peersMu.RUnlock()

	was, ok := ms.peers[n.ID]
	if !ok {
		if onFalse != nil {
			onFalse("peer_not_found")
		}
		return nil, false
	}
	return peerChangeDiff(was, n, onFalse)
}

// peerChangeDiff returns the difference from 'was' to 'n', if possible.
//