// Copyright (c) Tailscale Inc & AUTHORS // SPDX-License-Identifier: BSD-3-Clause package integration //go:generate go run gen_deps.go import ( "bytes" "context" "encoding/json" "errors" "flag" "fmt" "io" "log" "net" "net/http" "net/http/httptest" "net/netip" "os" "os/exec" "path/filepath" "regexp" "runtime" "strings" "sync" "sync/atomic" "testing" "time" "go4.org/mem" "tailscale.com/client/tailscale" "tailscale.com/clientupdate" "tailscale.com/cmd/testwrapper/flakytest" "tailscale.com/ipn" "tailscale.com/ipn/ipnlocal" "tailscale.com/ipn/ipnstate" "tailscale.com/ipn/store" "tailscale.com/safesocket" "tailscale.com/syncs" "tailscale.com/tailcfg" "tailscale.com/tstest" "tailscale.com/tstest/integration/testcontrol" "tailscale.com/types/key" "tailscale.com/types/logger" "tailscale.com/types/opt" "tailscale.com/types/ptr" "tailscale.com/util/must" "tailscale.com/util/rands" "tailscale.com/version" ) var ( verboseTailscaled = flag.Bool("verbose-tailscaled", false, "verbose tailscaled logging") verboseTailscale = flag.Bool("verbose-tailscale", false, "verbose tailscale CLI logging") ) var mainError syncs.AtomicValue[error] func TestMain(m *testing.M) { // Have to disable UPnP which hits the network, otherwise it fails due to HTTP proxy. os.Setenv("TS_DISABLE_UPNP", "true") flag.Parse() v := m.Run() CleanupBinaries() if v != 0 { os.Exit(v) } if err := mainError.Load(); err != nil { fmt.Fprintf(os.Stderr, "FAIL: %v\n", err) os.Exit(1) } os.Exit(0) } // Tests that tailscaled starts up in TUN mode, and also without data races: // https://github.com/tailscale/tailscale/issues/7894 func TestTUNMode(t *testing.T) { tstest.Shard(t) if os.Getuid() != 0 { t.Skip("skipping when not root") } tstest.Parallel(t) env := newTestEnv(t) env.tunMode = true n1 := newTestNode(t, env) d1 := n1.StartDaemon() n1.AwaitResponding() n1.MustUp() t.Logf("Got IP: %v", n1.AwaitIP4()) n1.AwaitRunning() d1.MustCleanShutdown(t) } func TestOneNodeUpNoAuth(t *testing.T) { tstest.Shard(t) tstest.Parallel(t) env := newTestEnv(t) n1 := newTestNode(t, env) d1 := n1.StartDaemon() n1.AwaitResponding() n1.MustUp() t.Logf("Got IP: %v", n1.AwaitIP4()) n1.AwaitRunning() d1.MustCleanShutdown(t) t.Logf("number of HTTP logcatcher requests: %v", env.LogCatcher.numRequests()) } func TestOneNodeExpiredKey(t *testing.T) { tstest.Shard(t) tstest.Parallel(t) env := newTestEnv(t) n1 := newTestNode(t, env) d1 := n1.StartDaemon() n1.AwaitResponding() n1.MustUp() n1.AwaitRunning() nodes := env.Control.AllNodes() if len(nodes) != 1 { t.Fatalf("expected 1 node, got %d nodes", len(nodes)) } nodeKey := nodes[0].Key ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second) if err := env.Control.AwaitNodeInMapRequest(ctx, nodeKey); err != nil { t.Fatal(err) } cancel() env.Control.SetExpireAllNodes(true) n1.AwaitNeedsLogin() ctx, cancel = context.WithTimeout(context.Background(), 5*time.Second) if err := env.Control.AwaitNodeInMapRequest(ctx, nodeKey); err != nil { t.Fatal(err) } cancel() env.Control.SetExpireAllNodes(false) n1.AwaitRunning() d1.MustCleanShutdown(t) } func TestControlKnobs(t *testing.T) { tstest.Shard(t) tstest.Parallel(t) env := newTestEnv(t) n1 := newTestNode(t, env) d1 := n1.StartDaemon() defer d1.MustCleanShutdown(t) n1.AwaitResponding() n1.MustUp() t.Logf("Got IP: %v", n1.AwaitIP4()) n1.AwaitRunning() cmd := n1.Tailscale("debug", "control-knobs") cmd.Stdout = nil // in case --verbose-tailscale was set cmd.Stderr = nil // in case --verbose-tailscale was set out, err := cmd.CombinedOutput() if err != nil { t.Fatal(err) } t.Logf("control-knobs output:\n%s", out) var m map[string]any if err := json.Unmarshal(out, &m); err != nil { t.Fatal(err) } if got, want := m["DisableUPnP"], true; got != want { t.Errorf("control-knobs DisableUPnP = %v; want %v", got, want) } } func TestCollectPanic(t *testing.T) { tstest.Shard(t) tstest.Parallel(t) env := newTestEnv(t) n := newTestNode(t, env) cmd := exec.Command(env.daemon, "--cleanup") cmd.Env = append(os.Environ(), "TS_PLEASE_PANIC=1", "TS_LOG_TARGET="+n.env.LogCatcherServer.URL, ) got, _ := cmd.CombinedOutput() // we expect it to fail, ignore err t.Logf("initial run: %s", got) // Now we run it again, and on start, it will upload the logs to logcatcher. cmd = exec.Command(env.daemon, "--cleanup") cmd.Env = append(os.Environ(), "TS_LOG_TARGET="+n.env.LogCatcherServer.URL) if out, err := cmd.CombinedOutput(); err != nil { t.Fatalf("cleanup failed: %v: %q", err, out) } if err := tstest.WaitFor(20*time.Second, func() error { const sub = `panic` if !n.env.LogCatcher.logsContains(mem.S(sub)) { return fmt.Errorf("log catcher didn't see %#q; got %s", sub, n.env.LogCatcher.logsString()) } return nil }); err != nil { t.Fatal(err) } } func TestControlTimeLogLine(t *testing.T) { tstest.Shard(t) tstest.Parallel(t) env := newTestEnv(t) env.LogCatcher.StoreRawJSON() n := newTestNode(t, env) n.StartDaemon() n.AwaitResponding() n.MustUp() n.AwaitRunning() if err := tstest.WaitFor(20*time.Second, func() error { const sub = `"controltime":"2020-08-03T00:00:00.000000001Z"` if !n.env.LogCatcher.logsContains(mem.S(sub)) { return fmt.Errorf("log catcher didn't see %#q; got %s", sub, n.env.LogCatcher.logsString()) } return nil }); err != nil { t.Fatal(err) } } // test Issue 2321: Start with UpdatePrefs should save prefs to disk func TestStateSavedOnStart(t *testing.T) { tstest.Shard(t) tstest.Parallel(t) env := newTestEnv(t) n1 := newTestNode(t, env) d1 := n1.StartDaemon() n1.AwaitResponding() n1.MustUp() t.Logf("Got IP: %v", n1.AwaitIP4()) n1.AwaitRunning() p1 := n1.diskPrefs() t.Logf("Prefs1: %v", p1.Pretty()) // Bring it down, to prevent an EditPrefs call in the // subsequent "up", as we want to test the bug when // cmd/tailscale implements "up" via LocalBackend.Start. n1.MustDown() // And change the hostname to something: if err := n1.Tailscale("up", "--login-server="+n1.env.controlURL(), "--hostname=foo").Run(); err != nil { t.Fatalf("up: %v", err) } p2 := n1.diskPrefs() if pretty := p1.Pretty(); pretty == p2.Pretty() { t.Errorf("Prefs didn't change on disk after 'up', still: %s", pretty) } if p2.Hostname != "foo" { t.Errorf("Prefs.Hostname = %q; want foo", p2.Hostname) } d1.MustCleanShutdown(t) } func TestOneNodeUpAuth(t *testing.T) { tstest.Shard(t) tstest.Parallel(t) env := newTestEnv(t, configureControl(func(control *testcontrol.Server) { control.RequireAuth = true })) n1 := newTestNode(t, env) d1 := n1.StartDaemon() n1.AwaitListening() st := n1.MustStatus() t.Logf("Status: %s", st.BackendState) t.Logf("Running up --login-server=%s ...", env.controlURL()) cmd := n1.Tailscale("up", "--login-server="+env.controlURL()) var authCountAtomic int32 cmd.Stdout = &authURLParserWriter{fn: func(urlStr string) error { if env.Control.CompleteAuth(urlStr) { atomic.AddInt32(&authCountAtomic, 1) t.Logf("completed auth path %s", urlStr) return nil } err := fmt.Errorf("Failed to complete auth path to %q", urlStr) t.Log(err) return err }} cmd.Stderr = cmd.Stdout if err := cmd.Run(); err != nil { t.Fatalf("up: %v", err) } t.Logf("Got IP: %v", n1.AwaitIP4()) n1.AwaitRunning() if n := atomic.LoadInt32(&authCountAtomic); n != 1 { t.Errorf("Auth URLs completed = %d; want 1", n) } d1.MustCleanShutdown(t) } func TestConfigFileAuthKey(t *testing.T) { tstest.SkipOnUnshardedCI(t) tstest.Shard(t) t.Parallel() const authKey = "opensesame" env := newTestEnv(t, configureControl(func(control *testcontrol.Server) { control.RequireAuthKey = authKey })) n1 := newTestNode(t, env) n1.configFile = filepath.Join(n1.dir, "config.json") authKeyFile := filepath.Join(n1.dir, "my-auth-key") must.Do(os.WriteFile(authKeyFile, fmt.Appendf(nil, "%s\n", authKey), 0666)) must.Do(os.WriteFile(n1.configFile, must.Get(json.Marshal(ipn.ConfigVAlpha{ Version: "alpha0", AuthKey: ptr.To("file:" + authKeyFile), ServerURL: ptr.To(n1.env.ControlServer.URL), })), 0644)) d1 := n1.StartDaemon() n1.AwaitListening() t.Logf("Got IP: %v", n1.AwaitIP4()) n1.AwaitRunning() d1.MustCleanShutdown(t) } func TestTwoNodes(t *testing.T) { tstest.Shard(t) tstest.Parallel(t) env := newTestEnv(t) // Create two nodes: n1 := newTestNode(t, env) n1SocksAddrCh := n1.socks5AddrChan() d1 := n1.StartDaemon() n2 := newTestNode(t, env) n2SocksAddrCh := n2.socks5AddrChan() d2 := n2.StartDaemon() // Drop some logs to disk on test failure. // // TODO(bradfitz): make all nodes for all tests do this? give each node a // unique integer within the test? But for now only do this test because // this is what we often saw flaking. t.Cleanup(func() { if !t.Failed() { return } n1.mu.Lock() n2.mu.Lock() defer n1.mu.Unlock() defer n2.mu.Unlock() rxNoDates := regexp.MustCompile(`(?m)^\d{4}.\d{2}.\d{2}.\d{2}:\d{2}:\d{2}`) cleanLog := func(n *testNode) []byte { b := n.tailscaledParser.allBuf.Bytes() b = rxNoDates.ReplaceAll(b, nil) return b } t.Logf("writing tailscaled logs to n1.log and n2.log") os.WriteFile("n1.log", cleanLog(n1), 0666) os.WriteFile("n2.log", cleanLog(n2), 0666) }) n1Socks := n1.AwaitSocksAddr(n1SocksAddrCh) n2Socks := n1.AwaitSocksAddr(n2SocksAddrCh) t.Logf("node1 SOCKS5 addr: %v", n1Socks) t.Logf("node2 SOCKS5 addr: %v", n2Socks) n1.AwaitListening() t.Logf("n1 is listening") n2.AwaitListening() t.Logf("n2 is listening") n1.MustUp() t.Logf("n1 is up") n2.MustUp() t.Logf("n2 is up") n1.AwaitRunning() t.Logf("n1 is running") n2.AwaitRunning() t.Logf("n2 is running") if err := tstest.WaitFor(2*time.Second, func() error { st := n1.MustStatus() if len(st.Peer) == 0 { return errors.New("no peers") } if len(st.Peer) > 1 { return fmt.Errorf("got %d peers; want 1", len(st.Peer)) } peer := st.Peer[st.Peers()[0]] if peer.ID == st.Self.ID { return errors.New("peer is self") } if len(st.TailscaleIPs) == 0 { return errors.New("no Tailscale IPs") } return nil }); err != nil { t.Error(err) } d1.MustCleanShutdown(t) d2.MustCleanShutdown(t) } // tests two nodes where the first gets a incremental MapResponse (with only // PeersRemoved set) saying that the second node disappeared. func TestIncrementalMapUpdatePeersRemoved(t *testing.T) { tstest.Shard(t) tstest.Parallel(t) env := newTestEnv(t) // Create one node: n1 := newTestNode(t, env) d1 := n1.StartDaemon() n1.AwaitListening() n1.MustUp() n1.AwaitRunning() all := env.Control.AllNodes() if len(all) != 1 { t.Fatalf("expected 1 node, got %d nodes", len(all)) } tnode1 := all[0] n2 := newTestNode(t, env) d2 := n2.StartDaemon() n2.AwaitListening() n2.MustUp() n2.AwaitRunning() all = env.Control.AllNodes() if len(all) != 2 { t.Fatalf("expected 2 node, got %d nodes", len(all)) } var tnode2 *tailcfg.Node for _, n := range all { if n.ID != tnode1.ID { tnode2 = n break } } if tnode2 == nil { t.Fatalf("failed to find second node ID (two dups?)") } t.Logf("node1=%v, node2=%v", tnode1.ID, tnode2.ID) if err := tstest.WaitFor(2*time.Second, func() error { st := n1.MustStatus() if len(st.Peer) == 0 { return errors.New("no peers") } if len(st.Peer) > 1 { return fmt.Errorf("got %d peers; want 1", len(st.Peer)) } peer := st.Peer[st.Peers()[0]] if peer.ID == st.Self.ID { return errors.New("peer is self") } return nil }); err != nil { t.Fatal(err) } t.Logf("node1 saw node2") // Now tell node1 that node2 is removed. if !env.Control.AddRawMapResponse(tnode1.Key, &tailcfg.MapResponse{ PeersRemoved: []tailcfg.NodeID{tnode2.ID}, }) { t.Fatalf("failed to add map response") } // And see that node1 saw that. if err := tstest.WaitFor(2*time.Second, func() error { st := n1.MustStatus() if len(st.Peer) == 0 { return nil } return fmt.Errorf("got %d peers; want 0", len(st.Peer)) }); err != nil { t.Fatal(err) } t.Logf("node1 saw node2 disappear") d1.MustCleanShutdown(t) d2.MustCleanShutdown(t) } func TestNodeAddressIPFields(t *testing.T) { tstest.Shard(t) flakytest.Mark(t, "https://github.com/tailscale/tailscale/issues/7008") tstest.Parallel(t) env := newTestEnv(t) n1 := newTestNode(t, env) d1 := n1.StartDaemon() n1.AwaitListening() n1.MustUp() n1.AwaitRunning() testNodes := env.Control.AllNodes() if len(testNodes) != 1 { t.Errorf("Expected %d nodes, got %d", 1, len(testNodes)) } node := testNodes[0] if len(node.Addresses) == 0 { t.Errorf("Empty Addresses field in node") } if len(node.AllowedIPs) == 0 { t.Errorf("Empty AllowedIPs field in node") } d1.MustCleanShutdown(t) } func TestAddPingRequest(t *testing.T) { tstest.Shard(t) tstest.Parallel(t) env := newTestEnv(t) n1 := newTestNode(t, env) n1.StartDaemon() n1.AwaitListening() n1.MustUp() n1.AwaitRunning() gotPing := make(chan bool, 1) waitPing := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { gotPing <- true })) defer waitPing.Close() nodes := env.Control.AllNodes() if len(nodes) != 1 { t.Fatalf("expected 1 node, got %d nodes", len(nodes)) } nodeKey := nodes[0].Key // Check that we get at least one ping reply after 10 tries. for try := 1; try <= 10; try++ { t.Logf("ping %v ...", try) ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second) if err := env.Control.AwaitNodeInMapRequest(ctx, nodeKey); err != nil { t.Fatal(err) } cancel() pr := &tailcfg.PingRequest{URL: fmt.Sprintf("%s/ping-%d", waitPing.URL, try), Log: true} if !env.Control.AddPingRequest(nodeKey, pr) { t.Logf("failed to AddPingRequest") continue } // Wait for PingRequest to come back pingTimeout := time.NewTimer(2 * time.Second) defer pingTimeout.Stop() select { case <-gotPing: t.Logf("got ping; success") return case <-pingTimeout.C: // Try again. } } t.Error("all ping attempts failed") } func TestC2NPingRequest(t *testing.T) { tstest.Shard(t) tstest.Parallel(t) env := newTestEnv(t) gotPing := make(chan bool, 1) env.Control.HandleC2N = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { if r.Method != "POST" { t.Errorf("unexpected ping method %q", r.Method) } got, err := io.ReadAll(r.Body) if err != nil { t.Errorf("ping body read error: %v", err) } const want = "HTTP/1.1 200 OK\r\nConnection: close\r\nContent-Type: text/plain; charset=utf-8\r\n\r\nabc" if string(got) != want { t.Errorf("body error\n got: %q\nwant: %q", got, want) } gotPing <- true }) n1 := newTestNode(t, env) n1.StartDaemon() n1.AwaitListening() n1.MustUp() n1.AwaitRunning() nodes := env.Control.AllNodes() if len(nodes) != 1 { t.Fatalf("expected 1 node, got %d nodes", len(nodes)) } nodeKey := nodes[0].Key // Check that we get at least one ping reply after 10 tries. for try := 1; try <= 10; try++ { t.Logf("ping %v ...", try) ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second) if err := env.Control.AwaitNodeInMapRequest(ctx, nodeKey); err != nil { t.Fatal(err) } cancel() pr := &tailcfg.PingRequest{ URL: fmt.Sprintf("https://unused/some-c2n-path/ping-%d", try), Log: true, Types: "c2n", Payload: []byte("POST /echo HTTP/1.0\r\nContent-Length: 3\r\n\r\nabc"), } if !env.Control.AddPingRequest(nodeKey, pr) { t.Logf("failed to AddPingRequest") continue } // Wait for PingRequest to come back pingTimeout := time.NewTimer(2 * time.Second) defer pingTimeout.Stop() select { case <-gotPing: t.Logf("got ping; success") return case <-pingTimeout.C: // Try again. } } t.Error("all ping attempts failed") } // Issue 2434: when "down" (WantRunning false), tailscaled shouldn't // be connected to control. func TestNoControlConnWhenDown(t *testing.T) { tstest.Shard(t) tstest.Parallel(t) env := newTestEnv(t) n1 := newTestNode(t, env) d1 := n1.StartDaemon() n1.AwaitResponding() // Come up the first time. n1.MustUp() ip1 := n1.AwaitIP4() n1.AwaitRunning() // Then bring it down and stop the daemon. n1.MustDown() d1.MustCleanShutdown(t) env.LogCatcher.Reset() d2 := n1.StartDaemon() n1.AwaitResponding() n1.AwaitBackendState("Stopped") ip2 := n1.AwaitIP4() if ip1 != ip2 { t.Errorf("IPs different: %q vs %q", ip1, ip2) } // The real test: verify our daemon doesn't have an HTTP request open. if n := env.Control.InServeMap(); n != 0 { t.Errorf("in serve map = %d; want 0", n) } d2.MustCleanShutdown(t) } // Issue 2137: make sure Windows tailscaled works with the CLI alone, // without the GUI to kick off a Start. func TestOneNodeUpWindowsStyle(t *testing.T) { tstest.Shard(t) tstest.Parallel(t) env := newTestEnv(t) n1 := newTestNode(t, env) n1.upFlagGOOS = "windows" d1 := n1.StartDaemonAsIPNGOOS("windows") n1.AwaitResponding() n1.MustUp("--unattended") t.Logf("Got IP: %v", n1.AwaitIP4()) n1.AwaitRunning() d1.MustCleanShutdown(t) } // TestClientSideJailing tests that when one node is jailed for another, the // jailed node cannot initiate connections to the other node however the other // node can initiate connections to the jailed node. func TestClientSideJailing(t *testing.T) { tstest.Shard(t) tstest.Parallel(t) env := newTestEnv(t) registerNode := func() (*testNode, key.NodePublic) { n := newTestNode(t, env) n.StartDaemon() n.AwaitListening() n.MustUp() n.AwaitRunning() k := n.MustStatus().Self.PublicKey return n, k } n1, k1 := registerNode() n2, k2 := registerNode() ln, err := net.Listen("tcp", "localhost:0") if err != nil { t.Fatal(err) } defer ln.Close() port := uint16(ln.Addr().(*net.TCPAddr).Port) lc1 := &tailscale.LocalClient{ Socket: n1.sockFile, UseSocketOnly: true, } lc2 := &tailscale.LocalClient{ Socket: n2.sockFile, UseSocketOnly: true, } ip1 := n1.AwaitIP4() ip2 := n2.AwaitIP4() tests := []struct { name string n1JailedForN2 bool n2JailedForN1 bool }{ { name: "not_jailed", n1JailedForN2: false, n2JailedForN1: false, }, { name: "uni_jailed", n1JailedForN2: true, n2JailedForN1: false, }, { name: "bi_jailed", // useless config? n1JailedForN2: true, n2JailedForN1: true, }, } testDial := func(t *testing.T, lc *tailscale.LocalClient, ip netip.Addr, port uint16, shouldFail bool) { t.Helper() ctx, cancel := context.WithTimeout(context.Background(), time.Second) defer cancel() c, err := lc.DialTCP(ctx, ip.String(), port) failed := err != nil if failed != shouldFail { t.Errorf("failed = %v; want %v", failed, shouldFail) } if c != nil { c.Close() } } b1, err := lc1.WatchIPNBus(context.Background(), 0) if err != nil { t.Fatal(err) } b2, err := lc2.WatchIPNBus(context.Background(), 0) if err != nil { t.Fatal(err) } waitPeerIsJailed := func(t *testing.T, b *tailscale.IPNBusWatcher, jailed bool) { t.Helper() for { n, err := b.Next() if err != nil { t.Fatal(err) } if n.NetMap == nil { continue } if len(n.NetMap.Peers) == 0 { continue } if j := n.NetMap.Peers[0].IsJailed(); j == jailed { break } } } for _, tc := range tests { t.Run(tc.name, func(t *testing.T) { env.Control.SetJailed(k1, k2, tc.n2JailedForN1) env.Control.SetJailed(k2, k1, tc.n1JailedForN2) // Wait for the jailed status to propagate. waitPeerIsJailed(t, b1, tc.n2JailedForN1) waitPeerIsJailed(t, b2, tc.n1JailedForN2) testDial(t, lc1, ip2, port, tc.n1JailedForN2) testDial(t, lc2, ip1, port, tc.n2JailedForN1) }) } } // TestNATPing creates two nodes, n1 and n2, sets up masquerades for both and // tries to do bi-directional pings between them. func TestNATPing(t *testing.T) { tstest.Shard(t) tstest.Parallel(t) for _, v6 := range []bool{false, true} { env := newTestEnv(t) registerNode := func() (*testNode, key.NodePublic) { n := newTestNode(t, env) n.StartDaemon() n.AwaitListening() n.MustUp() n.AwaitRunning() k := n.MustStatus().Self.PublicKey return n, k } n1, k1 := registerNode() n2, k2 := registerNode() var n1IP, n2IP netip.Addr if v6 { n1IP = n1.AwaitIP6() n2IP = n2.AwaitIP6() } else { n1IP = n1.AwaitIP4() n2IP = n2.AwaitIP4() } n1ExternalIP := netip.MustParseAddr("100.64.1.1") n2ExternalIP := netip.MustParseAddr("100.64.2.1") if v6 { n1ExternalIP = netip.MustParseAddr("fd7a:115c:a1e0::1a") n2ExternalIP = netip.MustParseAddr("fd7a:115c:a1e0::1b") } tests := []struct { name string pairs []testcontrol.MasqueradePair n1SeesN2IP netip.Addr n2SeesN1IP netip.Addr }{ { name: "no_nat", n1SeesN2IP: n2IP, n2SeesN1IP: n1IP, }, { name: "n1_has_external_ip", pairs: []testcontrol.MasqueradePair{ { Node: k1, Peer: k2, NodeMasqueradesAs: n1ExternalIP, }, }, n1SeesN2IP: n2IP, n2SeesN1IP: n1ExternalIP, }, { name: "n2_has_external_ip", pairs: []testcontrol.MasqueradePair{ { Node: k2, Peer: k1, NodeMasqueradesAs: n2ExternalIP, }, }, n1SeesN2IP: n2ExternalIP, n2SeesN1IP: n1IP, }, { name: "both_have_external_ips", pairs: []testcontrol.MasqueradePair{ { Node: k1, Peer: k2, NodeMasqueradesAs: n1ExternalIP, }, { Node: k2, Peer: k1, NodeMasqueradesAs: n2ExternalIP, }, }, n1SeesN2IP: n2ExternalIP, n2SeesN1IP: n1ExternalIP, }, } for _, tc := range tests { t.Run(fmt.Sprintf("v6=%t/%v", v6, tc.name), func(t *testing.T) { env.Control.SetMasqueradeAddresses(tc.pairs) ipIdx := 0 if v6 { ipIdx = 1 } s1 := n1.MustStatus() n2AsN1Peer := s1.Peer[k2] if got := n2AsN1Peer.TailscaleIPs[ipIdx]; got != tc.n1SeesN2IP { t.Fatalf("n1 sees n2 as %v; want %v", got, tc.n1SeesN2IP) } s2 := n2.MustStatus() n1AsN2Peer := s2.Peer[k1] if got := n1AsN2Peer.TailscaleIPs[ipIdx]; got != tc.n2SeesN1IP { t.Fatalf("n2 sees n1 as %v; want %v", got, tc.n2SeesN1IP) } if err := n1.Tailscale("ping", tc.n1SeesN2IP.String()).Run(); err != nil { t.Fatal(err) } if err := n1.Tailscale("ping", "-peerapi", tc.n1SeesN2IP.String()).Run(); err != nil { t.Fatal(err) } if err := n2.Tailscale("ping", tc.n2SeesN1IP.String()).Run(); err != nil { t.Fatal(err) } if err := n2.Tailscale("ping", "-peerapi", tc.n2SeesN1IP.String()).Run(); err != nil { t.Fatal(err) } }) } } } func TestLogoutRemovesAllPeers(t *testing.T) { tstest.Shard(t) tstest.Parallel(t) env := newTestEnv(t) // Spin up some nodes. nodes := make([]*testNode, 2) for i := range nodes { nodes[i] = newTestNode(t, env) nodes[i].StartDaemon() nodes[i].AwaitResponding() nodes[i].MustUp() nodes[i].AwaitIP4() nodes[i].AwaitRunning() } expectedPeers := len(nodes) - 1 // Make every node ping every other node. // This makes sure magicsock is fully populated. for i := range nodes { for j := range nodes { if i <= j { continue } if err := tstest.WaitFor(20*time.Second, func() error { return nodes[i].Ping(nodes[j]) }); err != nil { t.Fatalf("ping %v -> %v: %v", nodes[i].AwaitIP4(), nodes[j].AwaitIP4(), err) } } } // wantNode0PeerCount waits until node[0] status includes exactly want peers. wantNode0PeerCount := func(want int) { if err := tstest.WaitFor(20*time.Second, func() error { s := nodes[0].MustStatus() if peers := s.Peers(); len(peers) != want { return fmt.Errorf("want %d peer(s) in status, got %v", want, peers) } return nil }); err != nil { t.Fatal(err) } } wantNode0PeerCount(expectedPeers) // all other nodes are peers nodes[0].MustLogOut() wantNode0PeerCount(0) // node[0] is logged out, so it should not have any peers nodes[0].MustUp() // This will create a new node expectedPeers++ nodes[0].AwaitIP4() wantNode0PeerCount(expectedPeers) // all existing peers and the new node } func TestAutoUpdateDefaults(t *testing.T) { if !clientupdate.CanAutoUpdate() { t.Skip("auto-updates not supported on this platform") } tstest.Shard(t) tstest.Parallel(t) env := newTestEnv(t) checkDefault := func(n *testNode, want bool) error { enabled, ok := n.diskPrefs().AutoUpdate.Apply.Get() if !ok { return fmt.Errorf("auto-update for node is unset, should be set as %v", want) } if enabled != want { return fmt.Errorf("auto-update for node is %v, should be set as %v", enabled, want) } return nil } sendAndCheckDefault := func(t *testing.T, n *testNode, send, want bool) { t.Helper() if !env.Control.AddRawMapResponse(n.MustStatus().Self.PublicKey, &tailcfg.MapResponse{ DefaultAutoUpdate: opt.NewBool(send), }) { t.Fatal("failed to send MapResponse to node") } if err := tstest.WaitFor(2*time.Second, func() error { return checkDefault(n, want) }); err != nil { t.Fatal(err) } } tests := []struct { desc string run func(t *testing.T, n *testNode) }{ { desc: "tailnet-default-false", run: func(t *testing.T, n *testNode) { // First received default "false". sendAndCheckDefault(t, n, false, false) // Should not be changed even if sent "true" later. sendAndCheckDefault(t, n, true, false) // But can be changed explicitly by the user. if out, err := n.TailscaleForOutput("set", "--auto-update").CombinedOutput(); err != nil { t.Fatalf("failed to enable auto-update on node: %v\noutput: %s", err, out) } sendAndCheckDefault(t, n, false, true) }, }, { desc: "tailnet-default-true", run: func(t *testing.T, n *testNode) { // First received default "true". sendAndCheckDefault(t, n, true, true) // Should not be changed even if sent "false" later. sendAndCheckDefault(t, n, false, true) // But can be changed explicitly by the user. if out, err := n.TailscaleForOutput("set", "--auto-update=false").CombinedOutput(); err != nil { t.Fatalf("failed to disable auto-update on node: %v\noutput: %s", err, out) } sendAndCheckDefault(t, n, true, false) }, }, { desc: "user-sets-first", run: func(t *testing.T, n *testNode) { // User sets auto-update first, before receiving defaults. if out, err := n.TailscaleForOutput("set", "--auto-update=false").CombinedOutput(); err != nil { t.Fatalf("failed to disable auto-update on node: %v\noutput: %s", err, out) } // Defaults sent from control should be ignored. sendAndCheckDefault(t, n, true, false) sendAndCheckDefault(t, n, false, false) }, }, } for _, tt := range tests { t.Run(tt.desc, func(t *testing.T) { n := newTestNode(t, env) d := n.StartDaemon() defer d.MustCleanShutdown(t) n.AwaitResponding() n.MustUp() n.AwaitRunning() tt.run(t, n) }) } } // testEnv contains the test environment (set of servers) used by one // or more nodes. type testEnv struct { t testing.TB tunMode bool cli string daemon string LogCatcher *LogCatcher LogCatcherServer *httptest.Server Control *testcontrol.Server ControlServer *httptest.Server TrafficTrap *trafficTrap TrafficTrapServer *httptest.Server } // controlURL returns e.ControlServer.URL, panicking if it's the empty string, // which it should never be in tests. func (e *testEnv) controlURL() string { s := e.ControlServer.URL if s == "" { panic("control server not set") } return s } type testEnvOpt interface { modifyTestEnv(*testEnv) } type configureControl func(*testcontrol.Server) func (f configureControl) modifyTestEnv(te *testEnv) { f(te.Control) } // newTestEnv starts a bunch of services and returns a new test environment. // newTestEnv arranges for the environment's resources to be cleaned up on exit. func newTestEnv(t testing.TB, opts ...testEnvOpt) *testEnv { if runtime.GOOS == "windows" { t.Skip("not tested/working on Windows yet") } derpMap := RunDERPAndSTUN(t, logger.Discard, "127.0.0.1") logc := new(LogCatcher) control := &testcontrol.Server{ DERPMap: derpMap, } control.HTTPTestServer = httptest.NewUnstartedServer(control) trafficTrap := new(trafficTrap) e := &testEnv{ t: t, cli: TailscaleBinary(t), daemon: TailscaledBinary(t), LogCatcher: logc, LogCatcherServer: httptest.NewServer(logc), Control: control, ControlServer: control.HTTPTestServer, TrafficTrap: trafficTrap, TrafficTrapServer: httptest.NewServer(trafficTrap), } for _, o := range opts { o.modifyTestEnv(e) } control.HTTPTestServer.Start() t.Cleanup(func() { // Shut down e. if err := e.TrafficTrap.Err(); err != nil { e.t.Errorf("traffic trap: %v", err) e.t.Logf("logs: %s", e.LogCatcher.logsString()) } e.LogCatcherServer.Close() e.TrafficTrapServer.Close() e.ControlServer.Close() }) t.Logf("control URL: %v", e.controlURL()) return e } // testNode is a machine with a tailscale & tailscaled. // Currently, the test is simplistic and user==node==machine. // That may grow complexity later to test more. type testNode struct { env *testEnv tailscaledParser *nodeOutputParser dir string // temp dir for sock & state configFile string // or empty for none sockFile string stateFile string upFlagGOOS string // if non-empty, sets TS_DEBUG_UP_FLAG_GOOS for cmd/tailscale CLI mu sync.Mutex onLogLine []func([]byte) } // newTestNode allocates a temp directory for a new test node. // The node is not started automatically. func newTestNode(t *testing.T, env *testEnv) *testNode { dir := t.TempDir() sockFile := filepath.Join(dir, "tailscale.sock") if len(sockFile) >= 104 { // Maximum length for a unix socket on darwin. Try something else. sockFile = filepath.Join(os.TempDir(), rands.HexString(8)+".sock") t.Cleanup(func() { os.Remove(sockFile) }) } n := &testNode{ env: env, dir: dir, sockFile: sockFile, stateFile: filepath.Join(dir, "tailscale.state"), } // Look for a data race. Once we see the start marker, start logging the rest. var sawRace bool var sawPanic bool n.addLogLineHook(func(line []byte) { lineB := mem.B(line) if mem.Contains(lineB, mem.S("WARNING: DATA RACE")) { sawRace = true } if mem.HasPrefix(lineB, mem.S("panic: ")) { sawPanic = true } if sawRace || sawPanic { t.Logf("%s", line) } }) return n } func (n *testNode) diskPrefs() *ipn.Prefs { t := n.env.t t.Helper() if _, err := os.ReadFile(n.stateFile); err != nil { t.Fatalf("reading prefs: %v", err) } fs, err := store.NewFileStore(nil, n.stateFile) if err != nil { t.Fatalf("reading prefs, NewFileStore: %v", err) } p, err := ipnlocal.ReadStartupPrefsForTest(t.Logf, fs) if err != nil { t.Fatalf("reading prefs, ReadDiskPrefsForTest: %v", err) } return p.AsStruct() } // AwaitResponding waits for n's tailscaled to be up enough to be // responding, but doesn't wait for any particular state. func (n *testNode) AwaitResponding() { t := n.env.t t.Helper() n.AwaitListening() st := n.MustStatus() t.Logf("Status: %s", st.BackendState) if err := tstest.WaitFor(20*time.Second, func() error { const sub = `Program starting: ` if !n.env.LogCatcher.logsContains(mem.S(sub)) { return fmt.Errorf("log catcher didn't see %#q; got %s", sub, n.env.LogCatcher.logsString()) } return nil }); err != nil { t.Fatal(err) } } // addLogLineHook registers a hook f to be called on each tailscaled // log line output. func (n *testNode) addLogLineHook(f func([]byte)) { n.mu.Lock() defer n.mu.Unlock() n.onLogLine = append(n.onLogLine, f) } // socks5AddrChan returns a channel that receives the address (e.g. "localhost:23874") // of the node's SOCKS5 listener, once started. func (n *testNode) socks5AddrChan() <-chan string { ch := make(chan string, 1) n.addLogLineHook(func(line []byte) { const sub = "SOCKS5 listening on " i := mem.Index(mem.B(line), mem.S(sub)) if i == -1 { return } addr := strings.TrimSpace(string(line)[i+len(sub):]) select { case ch <- addr: default: } }) return ch } func (n *testNode) AwaitSocksAddr(ch <-chan string) string { t := n.env.t t.Helper() timer := time.NewTimer(10 * time.Second) defer timer.Stop() select { case v := <-ch: return v case <-timer.C: t.Fatal("timeout waiting for node to log its SOCK5 listening address") panic("unreachable") } } // nodeOutputParser parses stderr of tailscaled processes, calling the // per-line callbacks previously registered via // testNode.addLogLineHook. type nodeOutputParser struct { allBuf bytes.Buffer pendLineBuf bytes.Buffer n *testNode } func (op *nodeOutputParser) Write(p []byte) (n int, err error) { tn := op.n tn.mu.Lock() defer tn.mu.Unlock() op.allBuf.Write(p) n, err = op.pendLineBuf.Write(p) op.parseLinesLocked() return } func (op *nodeOutputParser) parseLinesLocked() { n := op.n buf := op.pendLineBuf.Bytes() for len(buf) > 0 { nl := bytes.IndexByte(buf, '\n') if nl == -1 { break } line := buf[:nl+1] buf = buf[nl+1:] for _, f := range n.onLogLine { f(line) } } if len(buf) == 0 { op.pendLineBuf.Reset() } else { io.CopyN(io.Discard, &op.pendLineBuf, int64(op.pendLineBuf.Len()-len(buf))) } } type Daemon struct { Process *os.Process } func (d *Daemon) MustCleanShutdown(t testing.TB) { d.Process.Signal(os.Interrupt) ps, err := d.Process.Wait() if err != nil { t.Fatalf("tailscaled Wait: %v", err) } if ps.ExitCode() != 0 { t.Errorf("tailscaled ExitCode = %d; want 0", ps.ExitCode()) } } // StartDaemon starts the node's tailscaled, failing if it fails to start. // StartDaemon ensures that the process will exit when the test completes. func (n *testNode) StartDaemon() *Daemon { return n.StartDaemonAsIPNGOOS(runtime.GOOS) } func (n *testNode) StartDaemonAsIPNGOOS(ipnGOOS string) *Daemon { t := n.env.t cmd := exec.Command(n.env.daemon) cmd.Args = append(cmd.Args, "--state="+n.stateFile, "--socket="+n.sockFile, "--socks5-server=localhost:0", ) if *verboseTailscaled { cmd.Args = append(cmd.Args, "-verbose=2") } if !n.env.tunMode { cmd.Args = append(cmd.Args, "--tun=userspace-networking", ) } if n.configFile != "" { cmd.Args = append(cmd.Args, "--config="+n.configFile) } cmd.Env = append(os.Environ(), "TS_DEBUG_PERMIT_HTTP_C2N=1", "TS_LOG_TARGET="+n.env.LogCatcherServer.URL, "HTTP_PROXY="+n.env.TrafficTrapServer.URL, "HTTPS_PROXY="+n.env.TrafficTrapServer.URL, "TS_DEBUG_FAKE_GOOS="+ipnGOOS, "TS_LOGS_DIR="+t.TempDir(), "TS_NETCHECK_GENERATE_204_URL="+n.env.ControlServer.URL+"/generate_204", "TS_ASSUME_NETWORK_UP_FOR_TEST=1", // don't pause control client in airplane mode (no wifi, etc) "TS_PANIC_IF_HIT_MAIN_CONTROL=1", "TS_DISABLE_PORTMAPPER=1", // shouldn't be needed; test is all localhost "TS_DEBUG_LOG_RATE=all", ) if version.IsRace() { cmd.Env = append(cmd.Env, "GORACE=halt_on_error=1") } n.tailscaledParser = &nodeOutputParser{n: n} cmd.Stderr = n.tailscaledParser if *verboseTailscaled { cmd.Stdout = os.Stdout cmd.Stderr = io.MultiWriter(cmd.Stderr, os.Stderr) } if runtime.GOOS != "windows" { pr, pw, err := os.Pipe() if err != nil { t.Fatal(err) } t.Cleanup(func() { pw.Close() }) cmd.ExtraFiles = append(cmd.ExtraFiles, pr) cmd.Env = append(cmd.Env, "TS_PARENT_DEATH_FD=3") } if err := cmd.Start(); err != nil { t.Fatalf("starting tailscaled: %v", err) } t.Cleanup(func() { cmd.Process.Kill() }) return &Daemon{ Process: cmd.Process, } } func (n *testNode) MustUp(extraArgs ...string) { t := n.env.t t.Helper() args := []string{ "up", "--login-server=" + n.env.controlURL(), "--reset", } args = append(args, extraArgs...) cmd := n.Tailscale(args...) t.Logf("Running %v ...", cmd) cmd.Stdout = nil // in case --verbose-tailscale was set cmd.Stderr = nil // in case --verbose-tailscale was set if b, err := cmd.CombinedOutput(); err != nil { t.Fatalf("up: %v, %v", string(b), err) } } func (n *testNode) MustDown() { t := n.env.t t.Logf("Running down ...") if err := n.Tailscale("down", "--accept-risk=all").Run(); err != nil { t.Fatalf("down: %v", err) } } func (n *testNode) MustLogOut() { t := n.env.t t.Logf("Running logout ...") if err := n.Tailscale("logout").Run(); err != nil { t.Fatalf("logout: %v", err) } } func (n *testNode) Ping(otherNode *testNode) error { t := n.env.t ip := otherNode.AwaitIP4().String() t.Logf("Running ping %v (from %v)...", ip, n.AwaitIP4()) return n.Tailscale("ping", ip).Run() } // AwaitListening waits for the tailscaled to be serving local clients // over its localhost IPC mechanism. (Unix socket, etc) func (n *testNode) AwaitListening() { t := n.env.t if err := tstest.WaitFor(20*time.Second, func() (err error) { c, err := safesocket.ConnectContext(context.Background(), n.sockFile) if err == nil { c.Close() } return err }); err != nil { t.Fatal(err) } } func (n *testNode) AwaitIPs() []netip.Addr { t := n.env.t t.Helper() var addrs []netip.Addr if err := tstest.WaitFor(20*time.Second, func() error { cmd := n.Tailscale("ip") cmd.Stdout = nil // in case --verbose-tailscale was set cmd.Stderr = nil // in case --verbose-tailscale was set out, err := cmd.Output() if err != nil { return err } ips := string(out) ipslice := strings.Fields(ips) addrs = make([]netip.Addr, len(ipslice)) for i, ip := range ipslice { netIP, err := netip.ParseAddr(ip) if err != nil { t.Fatal(err) } addrs[i] = netIP } return nil }); err != nil { t.Fatalf("awaiting an IP address: %v", err) } if len(addrs) == 0 { t.Fatalf("returned IP address was blank") } return addrs } // AwaitIP4 returns the IPv4 address of n. func (n *testNode) AwaitIP4() netip.Addr { t := n.env.t t.Helper() ips := n.AwaitIPs() return ips[0] } // AwaitIP6 returns the IPv6 address of n. func (n *testNode) AwaitIP6() netip.Addr { t := n.env.t t.Helper() ips := n.AwaitIPs() return ips[1] } // AwaitRunning waits for n to reach the IPN state "Running". func (n *testNode) AwaitRunning() { n.AwaitBackendState("Running") } func (n *testNode) AwaitBackendState(state string) { t := n.env.t t.Helper() if err := tstest.WaitFor(20*time.Second, func() error { st, err := n.Status() if err != nil { return err } if st.BackendState != state { return fmt.Errorf("in state %q; want %q", st.BackendState, state) } return nil }); err != nil { t.Fatalf("failure/timeout waiting for transition to Running status: %v", err) } } // AwaitNeedsLogin waits for n to reach the IPN state "NeedsLogin". func (n *testNode) AwaitNeedsLogin() { t := n.env.t t.Helper() if err := tstest.WaitFor(20*time.Second, func() error { st, err := n.Status() if err != nil { return err } if st.BackendState != "NeedsLogin" { return fmt.Errorf("in state %q", st.BackendState) } return nil }); err != nil { t.Fatalf("failure/timeout waiting for transition to NeedsLogin status: %v", err) } } func (n *testNode) TailscaleForOutput(arg ...string) *exec.Cmd { cmd := n.Tailscale(arg...) cmd.Stdout = nil cmd.Stderr = nil return cmd } // Tailscale returns a command that runs the tailscale CLI with the provided arguments. // It does not start the process. func (n *testNode) Tailscale(arg ...string) *exec.Cmd { cmd := exec.Command(n.env.cli) cmd.Args = append(cmd.Args, "--socket="+n.sockFile) cmd.Args = append(cmd.Args, arg...) cmd.Dir = n.dir cmd.Env = append(os.Environ(), "TS_DEBUG_UP_FLAG_GOOS="+n.upFlagGOOS, "TS_LOGS_DIR="+n.env.t.TempDir(), ) if *verboseTailscale { cmd.Stdout = os.Stdout cmd.Stderr = os.Stderr } return cmd } func (n *testNode) Status() (*ipnstate.Status, error) { cmd := n.Tailscale("status", "--json") cmd.Stdout = nil // in case --verbose-tailscale was set cmd.Stderr = nil // in case --verbose-tailscale was set out, err := cmd.CombinedOutput() if err != nil { return nil, fmt.Errorf("running tailscale status: %v, %s", err, out) } st := new(ipnstate.Status) if err := json.Unmarshal(out, st); err != nil { return nil, fmt.Errorf("decoding tailscale status JSON: %w", err) } return st, nil } func (n *testNode) MustStatus() *ipnstate.Status { tb := n.env.t tb.Helper() st, err := n.Status() if err != nil { tb.Fatal(err) } return st } // trafficTrap is an HTTP proxy handler to note whether any // HTTP traffic tries to leave localhost from tailscaled. We don't // expect any, so any request triggers a failure. type trafficTrap struct { atomicErr syncs.AtomicValue[error] } func (tt *trafficTrap) Err() error { return tt.atomicErr.Load() } func (tt *trafficTrap) ServeHTTP(w http.ResponseWriter, r *http.Request) { var got bytes.Buffer r.Write(&got) err := fmt.Errorf("unexpected HTTP request via proxy: %s", got.Bytes()) mainError.Store(err) if tt.Err() == nil { // Best effort at remembering the first request. tt.atomicErr.Store(err) } log.Printf("Error: %v", err) w.WriteHeader(403) } type authURLParserWriter struct { buf bytes.Buffer fn func(urlStr string) error } var authURLRx = regexp.MustCompile(`(https?://\S+/auth/\S+)`) func (w *authURLParserWriter) Write(p []byte) (n int, err error) { n, err = w.buf.Write(p) m := authURLRx.FindSubmatch(w.buf.Bytes()) if m != nil { urlStr := string(m[1]) w.buf.Reset() // so it's not matched again if err := w.fn(urlStr); err != nil { return 0, err } } return n, err }