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687 lines
19 KiB
Go
687 lines
19 KiB
Go
// Copyright (c) 2021 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 cli
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import (
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"bytes"
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"encoding/json"
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"flag"
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"fmt"
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"reflect"
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"strings"
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"testing"
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"inet.af/netaddr"
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"tailscale.com/ipn"
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"tailscale.com/ipn/ipnstate"
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"tailscale.com/types/logger"
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"tailscale.com/types/preftype"
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)
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// Test that checkForAccidentalSettingReverts's updateMaskedPrefsFromUpFlag can handle
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// all flags. This will panic if a new flag creeps in that's unhandled.
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func TestUpdateMaskedPrefsFromUpFlag(t *testing.T) {
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mp := new(ipn.MaskedPrefs)
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upFlagSet.VisitAll(func(f *flag.Flag) {
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updateMaskedPrefsFromUpFlag(mp, f.Name)
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})
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}
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func TestCheckForAccidentalSettingReverts(t *testing.T) {
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f := func(flags ...string) map[string]bool {
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m := make(map[string]bool)
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for _, f := range flags {
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m[f] = true
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}
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return m
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}
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tests := []struct {
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name string
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// flags, if non-nil populates flagSet and mp.
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flags []string // if non-nil,
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// flagSet and mp are required if flags is nil.
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// flagSet is the set of flags that were explicitly set in flags.
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// mp is the mutation to apply to server.
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flagSet map[string]bool
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mp *ipn.MaskedPrefs
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curPrefs *ipn.Prefs
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curUser string // os.Getenv("USER") on the client side
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goos string // empty means "linux"
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want string
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}{
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{
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name: "bare_up_means_up",
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flags: []string{},
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curPrefs: &ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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WantRunning: false,
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Hostname: "foo",
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},
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want: "",
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},
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{
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name: "losing_hostname",
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flags: []string{"--accept-dns"},
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curPrefs: &ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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WantRunning: false,
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Hostname: "foo",
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CorpDNS: true,
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NetfilterMode: preftype.NetfilterOn,
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AllowSingleHosts: true,
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},
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want: accidentalUpPrefix + " --accept-dns --hostname=foo",
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},
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{
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name: "hostname_changing_explicitly",
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flagSet: f("hostname"),
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curPrefs: &ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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WantRunning: false,
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Hostname: "foo",
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},
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mp: &ipn.MaskedPrefs{
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Prefs: ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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WantRunning: true,
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Hostname: "bar",
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},
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ControlURLSet: true,
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WantRunningSet: true,
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HostnameSet: true,
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},
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want: "",
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},
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{
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name: "hostname_changing_empty_explicitly",
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flagSet: f("hostname"),
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curPrefs: &ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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WantRunning: false,
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Hostname: "foo",
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},
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mp: &ipn.MaskedPrefs{
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Prefs: ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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WantRunning: true,
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Hostname: "",
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},
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ControlURLSet: true,
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WantRunningSet: true,
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HostnameSet: true,
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},
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want: "",
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},
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{
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name: "empty_slice_equals_nil_slice",
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flagSet: f("hostname"),
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curPrefs: &ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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AdvertiseRoutes: []netaddr.IPPrefix{},
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},
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mp: &ipn.MaskedPrefs{
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Prefs: ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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AdvertiseRoutes: nil,
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},
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ControlURLSet: true,
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},
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want: "",
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},
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{
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// Issue 1725: "tailscale up --authkey=..." (or other non-empty flags) works from
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// a fresh server's initial prefs.
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name: "up_with_default_prefs",
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flagSet: f("authkey"),
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curPrefs: ipn.NewPrefs(),
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mp: &ipn.MaskedPrefs{
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Prefs: *defaultPrefsFromUpArgs(t, "linux"),
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WantRunningSet: true,
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},
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want: "",
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},
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{
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name: "implicit_operator_change",
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flagSet: f("hostname"),
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curPrefs: &ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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OperatorUser: "alice",
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},
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curUser: "eve",
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mp: &ipn.MaskedPrefs{
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Prefs: ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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},
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ControlURLSet: true,
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},
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want: accidentalUpPrefix + " --hostname= --operator=alice",
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},
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{
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name: "implicit_operator_matches_shell_user",
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flagSet: f("hostname"),
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curPrefs: &ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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OperatorUser: "alice",
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},
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curUser: "alice",
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mp: &ipn.MaskedPrefs{
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Prefs: ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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},
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ControlURLSet: true,
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},
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want: "",
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},
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{
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name: "error_advertised_routes_exit_node_removed",
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flags: []string{"--advertise-routes=10.0.42.0/24"},
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curPrefs: &ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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AllowSingleHosts: true,
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CorpDNS: true,
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NetfilterMode: preftype.NetfilterOn,
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AdvertiseRoutes: []netaddr.IPPrefix{
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netaddr.MustParseIPPrefix("10.0.42.0/24"),
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netaddr.MustParseIPPrefix("0.0.0.0/0"),
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netaddr.MustParseIPPrefix("::/0"),
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},
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},
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want: accidentalUpPrefix + " --advertise-routes=10.0.42.0/24 --advertise-exit-node",
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},
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{
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name: "advertised_routes_exit_node_removed",
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flags: []string{"--advertise-routes=10.0.42.0/24", "--advertise-exit-node=false"},
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curPrefs: &ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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AllowSingleHosts: true,
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CorpDNS: true,
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NetfilterMode: preftype.NetfilterOn,
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AdvertiseRoutes: []netaddr.IPPrefix{
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netaddr.MustParseIPPrefix("10.0.42.0/24"),
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netaddr.MustParseIPPrefix("0.0.0.0/0"),
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netaddr.MustParseIPPrefix("::/0"),
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},
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},
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want: "",
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},
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{
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name: "advertised_routes_includes_the_0_routes", // but no --advertise-exit-node
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flagSet: f("advertise-routes"),
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curPrefs: &ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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AdvertiseRoutes: []netaddr.IPPrefix{
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netaddr.MustParseIPPrefix("10.0.42.0/24"),
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netaddr.MustParseIPPrefix("0.0.0.0/0"),
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netaddr.MustParseIPPrefix("::/0"),
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},
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},
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mp: &ipn.MaskedPrefs{
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Prefs: ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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AdvertiseRoutes: []netaddr.IPPrefix{
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netaddr.MustParseIPPrefix("11.1.43.0/24"),
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netaddr.MustParseIPPrefix("0.0.0.0/0"),
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netaddr.MustParseIPPrefix("::/0"),
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},
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},
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AdvertiseRoutesSet: true,
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},
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want: "",
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},
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{
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name: "advertise_exit_node", // Issue 1859
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flags: []string{"--advertise-exit-node"},
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curPrefs: &ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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AllowSingleHosts: true,
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CorpDNS: true,
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NetfilterMode: preftype.NetfilterOn,
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},
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want: "",
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},
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{
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name: "advertise_exit_node_over_existing_routes",
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flags: []string{"--advertise-exit-node"},
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curPrefs: &ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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AllowSingleHosts: true,
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CorpDNS: true,
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NetfilterMode: preftype.NetfilterOn,
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AdvertiseRoutes: []netaddr.IPPrefix{
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netaddr.MustParseIPPrefix("1.2.0.0/16"),
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},
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},
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want: accidentalUpPrefix + " --advertise-exit-node --advertise-routes=1.2.0.0/16",
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},
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{
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name: "advertise_exit_node_over_existing_routes_and_exit_node",
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flags: []string{"--advertise-exit-node"},
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curPrefs: &ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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AllowSingleHosts: true,
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CorpDNS: true,
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NetfilterMode: preftype.NetfilterOn,
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AdvertiseRoutes: []netaddr.IPPrefix{
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netaddr.MustParseIPPrefix("0.0.0.0/0"),
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netaddr.MustParseIPPrefix("::/0"),
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netaddr.MustParseIPPrefix("1.2.0.0/16"),
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},
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},
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want: accidentalUpPrefix + " --advertise-exit-node --advertise-routes=1.2.0.0/16",
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},
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{
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name: "exit_node_clearing", // Issue 1777
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flagSet: f("exit-node"),
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curPrefs: &ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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ExitNodeID: "fooID",
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},
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mp: &ipn.MaskedPrefs{
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Prefs: ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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ExitNodeIP: netaddr.IP{},
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},
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ExitNodeIPSet: true,
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},
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want: "",
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},
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{
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name: "remove_all_implicit",
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flags: []string{"--force-reauth"},
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curPrefs: &ipn.Prefs{
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WantRunning: true,
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ControlURL: ipn.DefaultControlURL,
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RouteAll: true,
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AllowSingleHosts: false,
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ExitNodeIP: netaddr.MustParseIP("100.64.5.6"),
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CorpDNS: false,
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ShieldsUp: true,
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AdvertiseTags: []string{"tag:foo", "tag:bar"},
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Hostname: "myhostname",
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ForceDaemon: true,
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AdvertiseRoutes: []netaddr.IPPrefix{
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netaddr.MustParseIPPrefix("10.0.0.0/16"),
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},
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NetfilterMode: preftype.NetfilterNoDivert,
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OperatorUser: "alice",
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},
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curUser: "eve",
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want: accidentalUpPrefix + " --force-reauth --accept-routes --host-routes=false --exit-node=100.64.5.6 --accept-dns=false --shields-up --advertise-tags=tag:foo,tag:bar --hostname=myhostname --unattended --advertise-routes=10.0.0.0/16 --netfilter-mode=nodivert --operator=alice",
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},
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{
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name: "remove_all_implicit_except_hostname",
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flags: []string{"--hostname=newhostname"},
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curPrefs: &ipn.Prefs{
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WantRunning: true,
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ControlURL: ipn.DefaultControlURL,
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RouteAll: true,
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AllowSingleHosts: false,
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ExitNodeIP: netaddr.MustParseIP("100.64.5.6"),
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CorpDNS: false,
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ShieldsUp: true,
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AdvertiseTags: []string{"tag:foo", "tag:bar"},
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Hostname: "myhostname",
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ForceDaemon: true,
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AdvertiseRoutes: []netaddr.IPPrefix{
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netaddr.MustParseIPPrefix("10.0.0.0/16"),
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},
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NetfilterMode: preftype.NetfilterNoDivert,
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OperatorUser: "alice",
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},
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curUser: "eve",
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want: accidentalUpPrefix + " --hostname=newhostname --accept-routes --host-routes=false --exit-node=100.64.5.6 --accept-dns=false --shields-up --advertise-tags=tag:foo,tag:bar --unattended --advertise-routes=10.0.0.0/16 --netfilter-mode=nodivert --operator=alice",
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},
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{
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name: "loggedout_is_implicit",
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flagSet: f("advertise-exit-node"),
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curPrefs: &ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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LoggedOut: true,
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},
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mp: &ipn.MaskedPrefs{
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Prefs: ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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AdvertiseRoutes: []netaddr.IPPrefix{
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netaddr.MustParseIPPrefix("0.0.0.0/0"),
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},
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},
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AdvertiseRoutesSet: true,
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},
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// not an error. LoggedOut is implicit.
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want: "",
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},
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{
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// Test that a pre-1.8 version of Tailscale with bogus NoSNAT pref
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// values is able to enable exit nodes without warnings.
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name: "make_windows_exit_node",
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flagSet: f("advertise-exit-node"),
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curPrefs: &ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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NoSNAT: true, // assume this no-op accidental pre-1.8 value
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},
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goos: "windows",
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mp: &ipn.MaskedPrefs{
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Prefs: ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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AdvertiseRoutes: []netaddr.IPPrefix{
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netaddr.MustParseIPPrefix("192.168.0.0/16"),
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},
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},
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AdvertiseRoutesSet: true,
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},
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want: "", // not an error
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},
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{
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name: "ignore_netfilter_change_non_linux",
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flagSet: f("accept-dns"),
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curPrefs: &ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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NetfilterMode: preftype.NetfilterNoDivert, // we never had this bug, but pretend it got set non-zero on Windows somehow
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},
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goos: "windows",
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mp: &ipn.MaskedPrefs{
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Prefs: ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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CorpDNS: false,
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},
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CorpDNSSet: true,
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},
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want: "", // not an error
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},
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{
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name: "operator_losing_routes_step1", // https://twitter.com/EXPbits/status/1390418145047887877
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flags: []string{"--operator=expbits"},
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curPrefs: &ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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AllowSingleHosts: true,
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CorpDNS: true,
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NetfilterMode: preftype.NetfilterOn,
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AdvertiseRoutes: []netaddr.IPPrefix{
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netaddr.MustParseIPPrefix("0.0.0.0/0"),
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netaddr.MustParseIPPrefix("::/0"),
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netaddr.MustParseIPPrefix("1.2.0.0/16"),
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},
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},
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want: accidentalUpPrefix + " --operator=expbits --advertise-routes=1.2.0.0/16 --advertise-exit-node",
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},
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{
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name: "operator_losing_routes_step2", // https://twitter.com/EXPbits/status/1390418145047887877
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flags: []string{"--operator=expbits", "--advertise-routes=1.2.0.0/16"},
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curPrefs: &ipn.Prefs{
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ControlURL: ipn.DefaultControlURL,
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AllowSingleHosts: true,
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CorpDNS: true,
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NetfilterMode: preftype.NetfilterOn,
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AdvertiseRoutes: []netaddr.IPPrefix{
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netaddr.MustParseIPPrefix("0.0.0.0/0"),
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netaddr.MustParseIPPrefix("::/0"),
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netaddr.MustParseIPPrefix("1.2.0.0/16"),
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},
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},
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want: accidentalUpPrefix + " --advertise-routes=1.2.0.0/16 --operator=expbits --advertise-exit-node",
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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goos := "linux"
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if tt.goos != "" {
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goos = tt.goos
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}
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flagSet := tt.flagSet
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mp := tt.mp
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if tt.flags != nil {
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if tt.flagSet != nil || tt.mp != nil {
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t.Fatal("flags and flagSet/mp are mutually exclusive")
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}
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var upArgs upArgsT
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fs := newUpFlagSet(goos, &upArgs)
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fs.Parse(tt.flags)
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prefs, err := prefsFromUpArgs(upArgs, t.Logf, new(ipnstate.Status), goos)
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if err != nil {
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t.Fatal(err)
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}
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flagSet, mp = flagSetAndMaskedPrefs(prefs, fs)
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}
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var got string
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if err := checkForAccidentalSettingReverts(flagSet, tt.curPrefs, mp, goos, tt.curUser); err != nil {
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got = err.Error()
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}
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if strings.TrimSpace(got) != tt.want {
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t.Errorf("unexpected result\n got: %s\nwant: %s\n", got, tt.want)
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}
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})
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}
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}
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|
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func defaultPrefsFromUpArgs(t testing.TB, goos string) *ipn.Prefs {
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upArgs := upArgsFromOSArgs(goos)
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prefs, err := prefsFromUpArgs(upArgs, logger.Discard, new(ipnstate.Status), "linux")
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if err != nil {
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t.Fatalf("defaultPrefsFromUpArgs: %v", err)
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}
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prefs.WantRunning = true
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return prefs
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}
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|
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func upArgsFromOSArgs(goos string, flagArgs ...string) (args upArgsT) {
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fs := newUpFlagSet(goos, &args)
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fs.Parse(flagArgs) // populates args
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return
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}
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|
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func TestPrefsFromUpArgs(t *testing.T) {
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tests := []struct {
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name string
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args upArgsT
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|
goos string // runtime.GOOS; empty means linux
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st *ipnstate.Status // or nil
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want *ipn.Prefs
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wantErr string
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wantWarn string
|
|
}{
|
|
{
|
|
name: "default_linux",
|
|
goos: "linux",
|
|
args: upArgsFromOSArgs("linux"),
|
|
want: &ipn.Prefs{
|
|
ControlURL: ipn.DefaultControlURL,
|
|
WantRunning: true,
|
|
NoSNAT: false,
|
|
NetfilterMode: preftype.NetfilterOn,
|
|
CorpDNS: true,
|
|
AllowSingleHosts: true,
|
|
},
|
|
},
|
|
{
|
|
name: "default_windows",
|
|
goos: "windows",
|
|
args: upArgsFromOSArgs("windows"),
|
|
want: &ipn.Prefs{
|
|
ControlURL: ipn.DefaultControlURL,
|
|
WantRunning: true,
|
|
CorpDNS: true,
|
|
AllowSingleHosts: true,
|
|
NetfilterMode: preftype.NetfilterOn,
|
|
},
|
|
},
|
|
{
|
|
name: "advertise_default_route",
|
|
args: upArgsFromOSArgs("linux", "--advertise-exit-node"),
|
|
want: &ipn.Prefs{
|
|
ControlURL: ipn.DefaultControlURL,
|
|
WantRunning: true,
|
|
AllowSingleHosts: true,
|
|
CorpDNS: true,
|
|
AdvertiseRoutes: []netaddr.IPPrefix{
|
|
netaddr.MustParseIPPrefix("0.0.0.0/0"),
|
|
netaddr.MustParseIPPrefix("::/0"),
|
|
},
|
|
NetfilterMode: preftype.NetfilterOn,
|
|
},
|
|
},
|
|
{
|
|
name: "error_advertise_route_invalid_ip",
|
|
args: upArgsT{
|
|
advertiseRoutes: "foo",
|
|
},
|
|
wantErr: `"foo" is not a valid IP address or CIDR prefix`,
|
|
},
|
|
{
|
|
name: "error_advertise_route_unmasked_bits",
|
|
args: upArgsT{
|
|
advertiseRoutes: "1.2.3.4/16",
|
|
},
|
|
wantErr: `1.2.3.4/16 has non-address bits set; expected 1.2.0.0/16`,
|
|
},
|
|
{
|
|
name: "error_exit_node_bad_ip",
|
|
args: upArgsT{
|
|
exitNodeIP: "foo",
|
|
},
|
|
wantErr: `invalid IP address "foo" for --exit-node: unable to parse IP`,
|
|
},
|
|
{
|
|
name: "error_exit_node_allow_lan_without_exit_node",
|
|
args: upArgsT{
|
|
exitNodeAllowLANAccess: true,
|
|
},
|
|
wantErr: `--exit-node-allow-lan-access can only be used with --exit-node`,
|
|
},
|
|
{
|
|
name: "error_tag_prefix",
|
|
args: upArgsT{
|
|
advertiseTags: "foo",
|
|
},
|
|
wantErr: `tag: "foo": tags must start with 'tag:'`,
|
|
},
|
|
{
|
|
name: "error_long_hostname",
|
|
args: upArgsT{
|
|
hostname: strings.Repeat("a", 300),
|
|
},
|
|
wantErr: `hostname too long: 300 bytes (max 256)`,
|
|
},
|
|
{
|
|
name: "error_linux_netfilter_empty",
|
|
args: upArgsT{
|
|
netfilterMode: "",
|
|
},
|
|
wantErr: `invalid value --netfilter-mode=""`,
|
|
},
|
|
{
|
|
name: "error_linux_netfilter_bogus",
|
|
args: upArgsT{
|
|
netfilterMode: "bogus",
|
|
},
|
|
wantErr: `invalid value --netfilter-mode="bogus"`,
|
|
},
|
|
{
|
|
name: "error_exit_node_ip_is_self_ip",
|
|
args: upArgsT{
|
|
exitNodeIP: "100.105.106.107",
|
|
},
|
|
st: &ipnstate.Status{
|
|
TailscaleIPs: []netaddr.IP{netaddr.MustParseIP("100.105.106.107")},
|
|
},
|
|
wantErr: `cannot use 100.105.106.107 as the exit node as it is a local IP address to this machine, did you mean --advertise-exit-node?`,
|
|
},
|
|
{
|
|
name: "warn_linux_netfilter_nodivert",
|
|
goos: "linux",
|
|
args: upArgsT{
|
|
netfilterMode: "nodivert",
|
|
},
|
|
wantWarn: "netfilter=nodivert; add iptables calls to ts-* chains manually.",
|
|
want: &ipn.Prefs{
|
|
WantRunning: true,
|
|
NetfilterMode: preftype.NetfilterNoDivert,
|
|
NoSNAT: true,
|
|
},
|
|
},
|
|
{
|
|
name: "warn_linux_netfilter_off",
|
|
goos: "linux",
|
|
args: upArgsT{
|
|
netfilterMode: "off",
|
|
},
|
|
wantWarn: "netfilter=off; configure iptables yourself.",
|
|
want: &ipn.Prefs{
|
|
WantRunning: true,
|
|
NetfilterMode: preftype.NetfilterOff,
|
|
NoSNAT: true,
|
|
},
|
|
},
|
|
}
|
|
for _, tt := range tests {
|
|
t.Run(tt.name, func(t *testing.T) {
|
|
var warnBuf bytes.Buffer
|
|
warnf := func(format string, a ...interface{}) {
|
|
fmt.Fprintf(&warnBuf, format, a...)
|
|
}
|
|
goos := tt.goos
|
|
if goos == "" {
|
|
goos = "linux"
|
|
}
|
|
st := tt.st
|
|
if st == nil {
|
|
st = new(ipnstate.Status)
|
|
}
|
|
got, err := prefsFromUpArgs(tt.args, warnf, st, goos)
|
|
gotErr := fmt.Sprint(err)
|
|
if tt.wantErr != "" {
|
|
if tt.wantErr != gotErr {
|
|
t.Errorf("wrong error.\n got error: %v\nwant error: %v\n", gotErr, tt.wantErr)
|
|
}
|
|
return
|
|
}
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
if tt.want == nil {
|
|
t.Fatal("tt.want is nil")
|
|
}
|
|
if !got.Equals(tt.want) {
|
|
jgot, _ := json.MarshalIndent(got, "", "\t")
|
|
jwant, _ := json.MarshalIndent(tt.want, "", "\t")
|
|
if bytes.Equal(jgot, jwant) {
|
|
t.Logf("prefs differ only in non-JSON-visible ways (nil/non-nil zero-length arrays)")
|
|
}
|
|
t.Errorf("wrong prefs\n got: %s\nwant: %s\n\ngot: %s\nwant: %s\n",
|
|
got.Pretty(), tt.want.Pretty(),
|
|
jgot, jwant,
|
|
)
|
|
|
|
}
|
|
})
|
|
}
|
|
|
|
}
|
|
|
|
func TestPrefFlagMapping(t *testing.T) {
|
|
prefType := reflect.TypeOf(ipn.Prefs{})
|
|
for i := 0; i < prefType.NumField(); i++ {
|
|
prefName := prefType.Field(i).Name
|
|
if _, ok := flagForPref[prefName]; ok {
|
|
continue
|
|
}
|
|
switch prefName {
|
|
case "WantRunning", "Persist", "LoggedOut":
|
|
// All explicitly handled (ignored) by checkForAccidentalSettingReverts.
|
|
continue
|
|
case "OSVersion", "DeviceModel":
|
|
// Only used by Android, which doesn't have a CLI mode anyway, so
|
|
// fine to not map.
|
|
continue
|
|
case "NotepadURLs":
|
|
// TODO(bradfitz): https://github.com/tailscale/tailscale/issues/1830
|
|
continue
|
|
}
|
|
t.Errorf("unexpected new ipn.Pref field %q is not handled by up.go (see addPrefFlagMapping and checkForAccidentalSettingReverts)", prefName)
|
|
}
|
|
}
|