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103 lines
3.0 KiB
Go
103 lines
3.0 KiB
Go
// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package controlclient
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import (
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"encoding/json"
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"fmt"
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"reflect"
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"tailscale.com/types/empty"
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"tailscale.com/types/netmap"
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"tailscale.com/types/persist"
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"tailscale.com/types/structs"
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)
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// State is the high-level state of the client. It is used only in
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// unit tests for proper sequencing, don't depend on it anywhere else.
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//
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// TODO(apenwarr): eliminate the state, as it's now obsolete.
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//
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// apenwarr: Historical note: controlclient.Auto was originally
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// intended to be the state machine for the whole tailscale client, but that
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// turned out to not be the right abstraction layer, and it moved to
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// ipn.Backend. Since ipn.Backend now has a state machine, it would be
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// much better if controlclient could be a simple stateless API. But the
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// current server-side API (two interlocking polling https calls) makes that
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// very hard to implement. A server side API change could untangle this and
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// remove all the statefulness.
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type State int
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const (
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StateNew = State(iota)
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StateNotAuthenticated
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StateAuthenticating
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StateURLVisitRequired
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StateAuthenticated
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StateSynchronized // connected and received map update
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)
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func (s State) MarshalText() ([]byte, error) {
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return []byte(s.String()), nil
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}
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func (s State) String() string {
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switch s {
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case StateNew:
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return "state:new"
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case StateNotAuthenticated:
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return "state:not-authenticated"
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case StateAuthenticating:
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return "state:authenticating"
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case StateURLVisitRequired:
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return "state:url-visit-required"
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case StateAuthenticated:
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return "state:authenticated"
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case StateSynchronized:
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return "state:synchronized"
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default:
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return fmt.Sprintf("state:unknown:%d", int(s))
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}
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}
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type Status struct {
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_ structs.Incomparable
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LoginFinished *empty.Message // nonempty when login finishes
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LogoutFinished *empty.Message // nonempty when logout finishes
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Err error
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URL string // interactive URL to visit to finish logging in
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NetMap *netmap.NetworkMap // server-pushed configuration
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// The internal state should not be exposed outside this
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// package, but we have some automated tests elsewhere that need to
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// use them. Please don't use these fields.
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// TODO(apenwarr): Unexport or remove these.
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State State
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Persist *persist.PersistView // locally persisted configuration
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}
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// Equal reports whether s and s2 are equal.
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func (s *Status) Equal(s2 *Status) bool {
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if s == nil && s2 == nil {
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return true
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}
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return s != nil && s2 != nil &&
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(s.LoginFinished == nil) == (s2.LoginFinished == nil) &&
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(s.LogoutFinished == nil) == (s2.LogoutFinished == nil) &&
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s.Err == s2.Err &&
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s.URL == s2.URL &&
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reflect.DeepEqual(s.Persist, s2.Persist) &&
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reflect.DeepEqual(s.NetMap, s2.NetMap) &&
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s.State == s2.State
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}
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func (s Status) String() string {
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b, err := json.MarshalIndent(s, "", "\t")
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if err != nil {
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panic(err)
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}
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return s.State.String() + " " + string(b)
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}
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