// Copyright (c) 2020 Tailscale Inc & AUTHORS All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package ipn import ( "encoding/json" "errors" "fmt" "io/ioutil" "net/netip" "os" "reflect" "strings" "testing" "time" "go4.org/mem" "tailscale.com/ipn/ipnstate" "tailscale.com/net/netaddr" "tailscale.com/tailcfg" "tailscale.com/tstest" "tailscale.com/types/key" "tailscale.com/types/persist" "tailscale.com/types/preftype" ) func fieldsOf(t reflect.Type) (fields []string) { for i := 0; i < t.NumField(); i++ { fields = append(fields, t.Field(i).Name) } return } func TestPrefsEqual(t *testing.T) { tstest.PanicOnLog() prefsHandles := []string{ "ControlURL", "RouteAll", "AllowSingleHosts", "ExitNodeID", "ExitNodeIP", "ExitNodeAllowLANAccess", "CorpDNS", "RunSSH", "WantRunning", "LoggedOut", "ShieldsUp", "AdvertiseTags", "Hostname", "NotepadURLs", "ForceDaemon", "AdvertiseRoutes", "NoSNAT", "NetfilterMode", "OperatorUser", "Persist", } if have := fieldsOf(reflect.TypeOf(Prefs{})); !reflect.DeepEqual(have, prefsHandles) { t.Errorf("Prefs.Equal check might be out of sync\nfields: %q\nhandled: %q\n", have, prefsHandles) } nets := func(strs ...string) (ns []netip.Prefix) { for _, s := range strs { n, err := netip.ParsePrefix(s) if err != nil { panic(err) } ns = append(ns, n) } return ns } tests := []struct { a, b *Prefs want bool }{ { &Prefs{}, nil, false, }, { nil, &Prefs{}, false, }, { &Prefs{}, &Prefs{}, true, }, { &Prefs{ControlURL: "https://controlplane.tailscale.com"}, &Prefs{ControlURL: "https://login.private.co"}, false, }, { &Prefs{ControlURL: "https://controlplane.tailscale.com"}, &Prefs{ControlURL: "https://controlplane.tailscale.com"}, true, }, { &Prefs{RouteAll: true}, &Prefs{RouteAll: false}, false, }, { &Prefs{RouteAll: true}, &Prefs{RouteAll: true}, true, }, { &Prefs{AllowSingleHosts: true}, &Prefs{AllowSingleHosts: false}, false, }, { &Prefs{AllowSingleHosts: true}, &Prefs{AllowSingleHosts: true}, true, }, { &Prefs{ExitNodeID: "n1234"}, &Prefs{}, false, }, { &Prefs{ExitNodeID: "n1234"}, &Prefs{ExitNodeID: "n1234"}, true, }, { &Prefs{ExitNodeIP: netip.MustParseAddr("1.2.3.4")}, &Prefs{}, false, }, { &Prefs{ExitNodeIP: netip.MustParseAddr("1.2.3.4")}, &Prefs{ExitNodeIP: netip.MustParseAddr("1.2.3.4")}, true, }, { &Prefs{}, &Prefs{ExitNodeAllowLANAccess: true}, false, }, { &Prefs{ExitNodeAllowLANAccess: true}, &Prefs{ExitNodeAllowLANAccess: true}, true, }, { &Prefs{CorpDNS: true}, &Prefs{CorpDNS: false}, false, }, { &Prefs{CorpDNS: true}, &Prefs{CorpDNS: true}, true, }, { &Prefs{WantRunning: true}, &Prefs{WantRunning: false}, false, }, { &Prefs{WantRunning: true}, &Prefs{WantRunning: true}, true, }, { &Prefs{NoSNAT: true}, &Prefs{NoSNAT: false}, false, }, { &Prefs{NoSNAT: true}, &Prefs{NoSNAT: true}, true, }, { &Prefs{Hostname: "android-host01"}, &Prefs{Hostname: "android-host02"}, false, }, { &Prefs{Hostname: ""}, &Prefs{Hostname: ""}, true, }, { &Prefs{NotepadURLs: true}, &Prefs{NotepadURLs: false}, false, }, { &Prefs{NotepadURLs: true}, &Prefs{NotepadURLs: true}, true, }, { &Prefs{ShieldsUp: true}, &Prefs{ShieldsUp: false}, false, }, { &Prefs{ShieldsUp: true}, &Prefs{ShieldsUp: true}, true, }, { &Prefs{AdvertiseRoutes: nil}, &Prefs{AdvertiseRoutes: []netip.Prefix{}}, true, }, { &Prefs{AdvertiseRoutes: []netip.Prefix{}}, &Prefs{AdvertiseRoutes: []netip.Prefix{}}, true, }, { &Prefs{AdvertiseRoutes: nets("192.168.0.0/24", "10.1.0.0/16")}, &Prefs{AdvertiseRoutes: nets("192.168.1.0/24", "10.2.0.0/16")}, false, }, { &Prefs{AdvertiseRoutes: nets("192.168.0.0/24", "10.1.0.0/16")}, &Prefs{AdvertiseRoutes: nets("192.168.0.0/24", "10.2.0.0/16")}, false, }, { &Prefs{AdvertiseRoutes: nets("192.168.0.0/24", "10.1.0.0/16")}, &Prefs{AdvertiseRoutes: nets("192.168.0.0/24", "10.1.0.0/16")}, true, }, { &Prefs{NetfilterMode: preftype.NetfilterOff}, &Prefs{NetfilterMode: preftype.NetfilterOn}, false, }, { &Prefs{NetfilterMode: preftype.NetfilterOn}, &Prefs{NetfilterMode: preftype.NetfilterOn}, true, }, { &Prefs{Persist: &persist.Persist{}}, &Prefs{Persist: &persist.Persist{LoginName: "dave"}}, false, }, { &Prefs{Persist: &persist.Persist{LoginName: "dave"}}, &Prefs{Persist: &persist.Persist{LoginName: "dave"}}, true, }, } for i, tt := range tests { got := tt.a.Equals(tt.b) if got != tt.want { t.Errorf("%d. Equal = %v; want %v", i, got, tt.want) } } } func checkPrefs(t *testing.T, p Prefs) { var err error var p2, p2c *Prefs var p2b *Prefs pp := p.Pretty() if pp == "" { t.Fatalf("default p.Pretty() failed\n") } t.Logf("\npp: %#v\n", pp) b := p.ToBytes() if len(b) == 0 { t.Fatalf("default p.ToBytes() failed\n") } if !p.Equals(&p) { t.Fatalf("p != p\n") } p2 = p.Clone() p2.RouteAll = true if p.Equals(p2) { t.Fatalf("p == p2\n") } p2b, err = PrefsFromBytes(p2.ToBytes()) if err != nil { t.Fatalf("PrefsFromBytes(p2) failed\n") } p2p := p2.Pretty() p2bp := p2b.Pretty() t.Logf("\np2p: %#v\np2bp: %#v\n", p2p, p2bp) if p2p != p2bp { t.Fatalf("p2p != p2bp\n%#v\n%#v\n", p2p, p2bp) } if !p2.Equals(p2b) { t.Fatalf("p2 != p2b\n%#v\n%#v\n", p2, p2b) } p2c = p2.Clone() if !p2b.Equals(p2c) { t.Fatalf("p2b != p2c\n") } } func TestBasicPrefs(t *testing.T) { tstest.PanicOnLog() p := Prefs{ ControlURL: "https://controlplane.tailscale.com", } checkPrefs(t, p) } func TestPrefsPersist(t *testing.T) { tstest.PanicOnLog() c := persist.Persist{ LoginName: "test@example.com", } p := Prefs{ ControlURL: "https://controlplane.tailscale.com", CorpDNS: true, Persist: &c, } checkPrefs(t, p) } func TestPrefsPretty(t *testing.T) { tests := []struct { p Prefs os string want string }{ { Prefs{}, "linux", "Prefs{ra=false mesh=false dns=false want=false routes=[] nf=off Persist=nil}", }, { Prefs{}, "windows", "Prefs{ra=false mesh=false dns=false want=false Persist=nil}", }, { Prefs{ShieldsUp: true}, "windows", "Prefs{ra=false mesh=false dns=false want=false shields=true Persist=nil}", }, { Prefs{AllowSingleHosts: true}, "windows", "Prefs{ra=false dns=false want=false Persist=nil}", }, { Prefs{ NotepadURLs: true, AllowSingleHosts: true, }, "windows", "Prefs{ra=false dns=false want=false notepad=true Persist=nil}", }, { Prefs{ AllowSingleHosts: true, WantRunning: true, ForceDaemon: true, // server mode }, "windows", "Prefs{ra=false dns=false want=true server=true Persist=nil}", }, { Prefs{ AllowSingleHosts: true, WantRunning: true, ControlURL: "http://localhost:1234", AdvertiseTags: []string{"tag:foo", "tag:bar"}, }, "darwin", `Prefs{ra=false dns=false want=true tags=tag:foo,tag:bar url="http://localhost:1234" Persist=nil}`, }, { Prefs{ Persist: &persist.Persist{}, }, "linux", `Prefs{ra=false mesh=false dns=false want=false routes=[] nf=off Persist{lm=, o=, n= u=""}}`, }, { Prefs{ Persist: &persist.Persist{ PrivateNodeKey: key.NodePrivateFromRaw32(mem.B([]byte{1: 1, 31: 0})), }, }, "linux", `Prefs{ra=false mesh=false dns=false want=false routes=[] nf=off Persist{lm=, o=, n=[B1VKl] u=""}}`, }, { Prefs{ ExitNodeIP: netip.MustParseAddr("1.2.3.4"), }, "linux", `Prefs{ra=false mesh=false dns=false want=false exit=1.2.3.4 lan=false routes=[] nf=off Persist=nil}`, }, { Prefs{ ExitNodeID: tailcfg.StableNodeID("myNodeABC"), }, "linux", `Prefs{ra=false mesh=false dns=false want=false exit=myNodeABC lan=false routes=[] nf=off Persist=nil}`, }, { Prefs{ ExitNodeID: tailcfg.StableNodeID("myNodeABC"), ExitNodeAllowLANAccess: true, }, "linux", `Prefs{ra=false mesh=false dns=false want=false exit=myNodeABC lan=true routes=[] nf=off Persist=nil}`, }, { Prefs{ ExitNodeAllowLANAccess: true, }, "linux", `Prefs{ra=false mesh=false dns=false want=false routes=[] nf=off Persist=nil}`, }, { Prefs{ Hostname: "foo", }, "linux", `Prefs{ra=false mesh=false dns=false want=false routes=[] nf=off host="foo" Persist=nil}`, }, } for i, tt := range tests { got := tt.p.pretty(tt.os) if got != tt.want { t.Errorf("%d. wrong String:\n got: %s\nwant: %s\n", i, got, tt.want) } } } func TestLoadPrefsNotExist(t *testing.T) { bogusFile := fmt.Sprintf("/tmp/not-exist-%d", time.Now().UnixNano()) p, err := LoadPrefs(bogusFile) if errors.Is(err, os.ErrNotExist) { // expected. return } t.Fatalf("unexpected prefs=%#v, err=%v", p, err) } // TestLoadPrefsFileWithZeroInIt verifies that LoadPrefs hanldes corrupted input files. // See issue #954 for details. func TestLoadPrefsFileWithZeroInIt(t *testing.T) { f, err := ioutil.TempFile("", "TestLoadPrefsFileWithZeroInIt") if err != nil { t.Fatal(err) } path := f.Name() if _, err := f.Write(jsonEscapedZero); err != nil { t.Fatal(err) } f.Close() defer os.Remove(path) p, err := LoadPrefs(path) if errors.Is(err, os.ErrNotExist) { // expected. return } t.Fatalf("unexpected prefs=%#v, err=%v", p, err) } func TestMaskedPrefsFields(t *testing.T) { have := map[string]bool{} for _, f := range fieldsOf(reflect.TypeOf(Prefs{})) { if f == "Persist" { // This one can't be edited. continue } have[f] = true } for _, f := range fieldsOf(reflect.TypeOf(MaskedPrefs{})) { if f == "Prefs" { continue } if !strings.HasSuffix(f, "Set") { t.Errorf("unexpected non-/Set$/ field %q", f) continue } bare := strings.TrimSuffix(f, "Set") _, ok := have[bare] if !ok { t.Errorf("no corresponding Prefs.%s field for MaskedPrefs.%s", bare, f) continue } delete(have, bare) } for f := range have { t.Errorf("missing MaskedPrefs.%sSet for Prefs.%s", f, f) } // And also make sure they line up in the right order, which // ApplyEdits assumes. pt := reflect.TypeOf(Prefs{}) mt := reflect.TypeOf(MaskedPrefs{}) for i := 0; i < mt.NumField(); i++ { name := mt.Field(i).Name if i == 0 { if name != "Prefs" { t.Errorf("first field of MaskedPrefs should be Prefs") } continue } prefName := pt.Field(i - 1).Name if prefName+"Set" != name { t.Errorf("MaskedField[%d] = %s; want %sSet", i-1, name, prefName) } } } func TestPrefsApplyEdits(t *testing.T) { tests := []struct { name string prefs *Prefs edit *MaskedPrefs want *Prefs }{ { name: "no_change", prefs: &Prefs{ Hostname: "foo", }, edit: &MaskedPrefs{}, want: &Prefs{ Hostname: "foo", }, }, { name: "set1_decoy1", prefs: &Prefs{ Hostname: "foo", }, edit: &MaskedPrefs{ Prefs: Prefs{ Hostname: "bar", OperatorUser: "ignore-this", // not set }, HostnameSet: true, }, want: &Prefs{ Hostname: "bar", }, }, { name: "set_several", prefs: &Prefs{}, edit: &MaskedPrefs{ Prefs: Prefs{ Hostname: "bar", OperatorUser: "galaxybrain", }, HostnameSet: true, OperatorUserSet: true, }, want: &Prefs{ Hostname: "bar", OperatorUser: "galaxybrain", }, }, } for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { got := tt.prefs.Clone() got.ApplyEdits(tt.edit) if !got.Equals(tt.want) { gotj, _ := json.Marshal(got) wantj, _ := json.Marshal(tt.want) t.Errorf("fail.\n got: %s\nwant: %s\n", gotj, wantj) } }) } } func TestMaskedPrefsPretty(t *testing.T) { tests := []struct { m *MaskedPrefs want string }{ { m: &MaskedPrefs{}, want: "MaskedPrefs{}", }, { m: &MaskedPrefs{ Prefs: Prefs{ Hostname: "bar", OperatorUser: "galaxybrain", AllowSingleHosts: true, RouteAll: false, ExitNodeID: "foo", AdvertiseTags: []string{"tag:foo", "tag:bar"}, NetfilterMode: preftype.NetfilterNoDivert, }, RouteAllSet: true, HostnameSet: true, OperatorUserSet: true, ExitNodeIDSet: true, AdvertiseTagsSet: true, NetfilterModeSet: true, }, want: `MaskedPrefs{RouteAll=false ExitNodeID="foo" AdvertiseTags=["tag:foo" "tag:bar"] Hostname="bar" NetfilterMode=nodivert OperatorUser="galaxybrain"}`, }, { m: &MaskedPrefs{ Prefs: Prefs{ ExitNodeIP: netaddr.IPv4(100, 102, 104, 105), }, ExitNodeIPSet: true, }, want: `MaskedPrefs{ExitNodeIP=100.102.104.105}`, }, } for i, tt := range tests { got := tt.m.Pretty() if got != tt.want { t.Errorf("%d.\n got: %#q\nwant: %#q\n", i, got, tt.want) } } } func TestPrefsExitNode(t *testing.T) { var p *Prefs if p.AdvertisesExitNode() { t.Errorf("nil shouldn't advertise exit node") } p = NewPrefs() if p.AdvertisesExitNode() { t.Errorf("default shouldn't advertise exit node") } p.AdvertiseRoutes = []netip.Prefix{ netip.MustParsePrefix("10.0.0.0/16"), } p.SetAdvertiseExitNode(true) if got, want := len(p.AdvertiseRoutes), 3; got != want { t.Errorf("routes = %d; want %d", got, want) } p.SetAdvertiseExitNode(true) if got, want := len(p.AdvertiseRoutes), 3; got != want { t.Errorf("routes = %d; want %d", got, want) } if !p.AdvertisesExitNode() { t.Errorf("not advertising after enable") } p.SetAdvertiseExitNode(false) if p.AdvertisesExitNode() { t.Errorf("advertising after disable") } if got, want := len(p.AdvertiseRoutes), 1; got != want { t.Errorf("routes = %d; want %d", got, want) } } func TestExitNodeIPOfArg(t *testing.T) { mustIP := netip.MustParseAddr tests := []struct { name string arg string st *ipnstate.Status want netip.Addr wantErr string }{ { name: "ip_while_stopped_okay", arg: "1.2.3.4", st: &ipnstate.Status{ BackendState: "Stopped", }, want: mustIP("1.2.3.4"), }, { name: "ip_not_found", arg: "1.2.3.4", st: &ipnstate.Status{ BackendState: "Running", }, wantErr: `no node found in netmap with IP 1.2.3.4`, }, { name: "ip_not_exit", arg: "1.2.3.4", st: &ipnstate.Status{ BackendState: "Running", Peer: map[key.NodePublic]*ipnstate.PeerStatus{ key.NewNode().Public(): { TailscaleIPs: []netip.Addr{mustIP("1.2.3.4")}, }, }, }, wantErr: `node 1.2.3.4 is not advertising an exit node`, }, { name: "ip", arg: "1.2.3.4", st: &ipnstate.Status{ BackendState: "Running", Peer: map[key.NodePublic]*ipnstate.PeerStatus{ key.NewNode().Public(): { TailscaleIPs: []netip.Addr{mustIP("1.2.3.4")}, ExitNodeOption: true, }, }, }, want: mustIP("1.2.3.4"), }, { name: "no_match", arg: "unknown", st: &ipnstate.Status{MagicDNSSuffix: ".foo"}, wantErr: `invalid value "unknown" for --exit-node; must be IP or unique node name`, }, { name: "name", arg: "skippy", st: &ipnstate.Status{ MagicDNSSuffix: ".foo", Peer: map[key.NodePublic]*ipnstate.PeerStatus{ key.NewNode().Public(): { DNSName: "skippy.foo.", TailscaleIPs: []netip.Addr{mustIP("1.0.0.2")}, ExitNodeOption: true, }, }, }, want: mustIP("1.0.0.2"), }, { name: "name_not_exit", arg: "skippy", st: &ipnstate.Status{ MagicDNSSuffix: ".foo", Peer: map[key.NodePublic]*ipnstate.PeerStatus{ key.NewNode().Public(): { DNSName: "skippy.foo.", TailscaleIPs: []netip.Addr{mustIP("1.0.0.2")}, }, }, }, wantErr: `node "skippy" is not advertising an exit node`, }, { name: "ambiguous", arg: "skippy", st: &ipnstate.Status{ MagicDNSSuffix: ".foo", Peer: map[key.NodePublic]*ipnstate.PeerStatus{ key.NewNode().Public(): { DNSName: "skippy.foo.", TailscaleIPs: []netip.Addr{mustIP("1.0.0.2")}, ExitNodeOption: true, }, key.NewNode().Public(): { DNSName: "SKIPPY.foo.", TailscaleIPs: []netip.Addr{mustIP("1.0.0.2")}, ExitNodeOption: true, }, }, }, wantErr: `ambiguous exit node name "skippy"`, }, } for _, tt := range tests { t.Run(tt.name, func(t *testing.T) { got, err := exitNodeIPOfArg(tt.arg, tt.st) if err != nil { if err.Error() == tt.wantErr { return } if tt.wantErr == "" { t.Fatal(err) } t.Fatalf("error = %#q; want %#q", err, tt.wantErr) } if tt.wantErr != "" { t.Fatalf("got %v; want error %#q", got, tt.wantErr) } if got != tt.want { t.Fatalf("got %v; want %v", got, tt.want) } }) } } func TestControlURLOrDefault(t *testing.T) { var p Prefs if got, want := p.ControlURLOrDefault(), DefaultControlURL; got != want { t.Errorf("got %q; want %q", got, want) } p.ControlURL = "http://foo.bar" if got, want := p.ControlURLOrDefault(), "http://foo.bar"; got != want { t.Errorf("got %q; want %q", got, want) } p.ControlURL = "https://login.tailscale.com" if got, want := p.ControlURLOrDefault(), DefaultControlURL; got != want { t.Errorf("got %q; want %q", got, want) } }