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tailscale/tsnet/tsnet_test.go

371 lines
8.6 KiB
Go

// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
package tsnet
import (
"context"
"errors"
"flag"
"fmt"
"io"
"net"
"net/http"
"net/http/httptest"
"net/netip"
"os"
"path/filepath"
"testing"
"time"
"golang.org/x/net/proxy"
"tailscale.com/ipn/store/mem"
"tailscale.com/net/netns"
"tailscale.com/tailcfg"
"tailscale.com/tstest/integration"
"tailscale.com/tstest/integration/testcontrol"
"tailscale.com/types/logger"
)
// TestListener_Server ensures that the listener type always keeps the Server
// method, which is used by some external applications to identify a tsnet.Listener
// from other net.Listeners, as well as access the underlying Server.
func TestListener_Server(t *testing.T) {
s := &Server{}
ln := listener{s: s}
if ln.Server() != s {
t.Errorf("listener.Server() returned %v, want %v", ln.Server(), s)
}
}
func TestListenerPort(t *testing.T) {
errNone := errors.New("sentinel start error")
tests := []struct {
network string
addr string
wantErr bool
}{
{"tcp", ":80", false},
{"foo", ":80", true},
{"tcp", ":http", false}, // built-in name to Go; doesn't require cgo, /etc/services
{"tcp", ":https", false}, // built-in name to Go; doesn't require cgo, /etc/services
{"tcp", ":gibberishsdlkfj", true},
{"tcp", ":%!d(string=80)", true}, // issue 6201
{"udp", ":80", false},
{"udp", "100.102.104.108:80", false},
{"udp", "not-an-ip:80", true},
{"udp4", ":80", false},
{"udp4", "100.102.104.108:80", false},
{"udp4", "not-an-ip:80", true},
// Verify network type matches IP
{"tcp4", "1.2.3.4:80", false},
{"tcp6", "1.2.3.4:80", true},
{"tcp4", "[12::34]:80", true},
{"tcp6", "[12::34]:80", false},
}
for _, tt := range tests {
s := &Server{}
s.initOnce.Do(func() { s.initErr = errNone })
_, err := s.Listen(tt.network, tt.addr)
gotErr := err != nil && err != errNone
if gotErr != tt.wantErr {
t.Errorf("Listen(%q, %q) error = %v, want %v", tt.network, tt.addr, gotErr, tt.wantErr)
}
}
}
var verboseDERP = flag.Bool("verbose-derp", false, "if set, print DERP and STUN logs")
var verboseNodes = flag.Bool("verbose-nodes", false, "if set, print tsnet.Server logs")
func startControl(t *testing.T) (controlURL string) {
// Corp#4520: don't use netns for tests.
netns.SetEnabled(false)
t.Cleanup(func() {
netns.SetEnabled(true)
})
derpLogf := logger.Discard
if *verboseDERP {
derpLogf = t.Logf
}
derpMap := integration.RunDERPAndSTUN(t, derpLogf, "127.0.0.1")
control := &testcontrol.Server{
DERPMap: derpMap,
}
control.HTTPTestServer = httptest.NewUnstartedServer(control)
control.HTTPTestServer.Start()
t.Cleanup(control.HTTPTestServer.Close)
controlURL = control.HTTPTestServer.URL
t.Logf("testcontrol listening on %s", controlURL)
return controlURL
}
func startServer(t *testing.T, ctx context.Context, controlURL, hostname string) (*Server, netip.Addr) {
t.Helper()
tmp := filepath.Join(t.TempDir(), hostname)
os.MkdirAll(tmp, 0755)
s := &Server{
Dir: tmp,
ControlURL: controlURL,
Hostname: hostname,
Store: new(mem.Store),
Ephemeral: true,
}
if !*verboseNodes {
s.Logf = logger.Discard
}
t.Cleanup(func() { s.Close() })
status, err := s.Up(ctx)
if err != nil {
t.Fatal(err)
}
return s, status.TailscaleIPs[0]
}
func TestConn(t *testing.T) {
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
controlURL := startControl(t)
s1, s1ip := startServer(t, ctx, controlURL, "s1")
s2, _ := startServer(t, ctx, controlURL, "s2")
lc2, err := s2.LocalClient()
if err != nil {
t.Fatal(err)
}
// ping to make sure the connection is up.
res, err := lc2.Ping(ctx, s1ip, tailcfg.PingICMP)
if err != nil {
t.Fatal(err)
}
t.Logf("ping success: %#+v", res)
// pass some data through TCP.
ln, err := s1.Listen("tcp", ":8081")
if err != nil {
t.Fatal(err)
}
defer ln.Close()
w, err := s2.Dial(ctx, "tcp", fmt.Sprintf("%s:8081", s1ip))
if err != nil {
t.Fatal(err)
}
r, err := ln.Accept()
if err != nil {
t.Fatal(err)
}
want := "hello"
if _, err := io.WriteString(w, want); err != nil {
t.Fatal(err)
}
got := make([]byte, len(want))
if _, err := io.ReadAtLeast(r, got, len(got)); err != nil {
t.Fatal(err)
}
t.Logf("got: %q", got)
if string(got) != want {
t.Errorf("got %q, want %q", got, want)
}
_, err = s2.Dial(ctx, "tcp", fmt.Sprintf("%s:8082", s1ip)) // some random port
if err == nil {
t.Fatalf("unexpected success; should have seen a connection refused error")
}
}
func TestLoopbackLocalAPI(t *testing.T) {
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
controlURL := startControl(t)
s1, _ := startServer(t, ctx, controlURL, "s1")
addr, proxyCred, localAPICred, err := s1.Loopback()
if err != nil {
t.Fatal(err)
}
if proxyCred == localAPICred {
t.Fatal("proxy password matches local API password, they should be different")
}
url := "http://" + addr + "/localapi/v0/status"
req, err := http.NewRequestWithContext(ctx, "GET", url, nil)
if err != nil {
t.Fatal(err)
}
res, err := http.DefaultClient.Do(req)
if err != nil {
t.Fatal(err)
}
res.Body.Close()
if res.StatusCode != 403 {
t.Errorf("GET %s returned %d, want 403 without Sec- header", url, res.StatusCode)
}
req, err = http.NewRequestWithContext(ctx, "GET", url, nil)
if err != nil {
t.Fatal(err)
}
req.Header.Set("Sec-Tailscale", "localapi")
res, err = http.DefaultClient.Do(req)
if err != nil {
t.Fatal(err)
}
res.Body.Close()
if res.StatusCode != 401 {
t.Errorf("GET %s returned %d, want 401 without basic auth", url, res.StatusCode)
}
req, err = http.NewRequestWithContext(ctx, "GET", url, nil)
if err != nil {
t.Fatal(err)
}
req.SetBasicAuth("", localAPICred)
res, err = http.DefaultClient.Do(req)
if err != nil {
t.Fatal(err)
}
res.Body.Close()
if res.StatusCode != 403 {
t.Errorf("GET %s returned %d, want 403 without Sec- header", url, res.StatusCode)
}
req, err = http.NewRequestWithContext(ctx, "GET", url, nil)
if err != nil {
t.Fatal(err)
}
req.Header.Set("Sec-Tailscale", "localapi")
req.SetBasicAuth("", localAPICred)
res, err = http.DefaultClient.Do(req)
if err != nil {
t.Fatal(err)
}
res.Body.Close()
if res.StatusCode != 200 {
t.Errorf("GET /status returned %d, want 200", res.StatusCode)
}
}
func TestLoopbackSOCKS5(t *testing.T) {
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
controlURL := startControl(t)
s1, s1ip := startServer(t, ctx, controlURL, "s1")
s2, _ := startServer(t, ctx, controlURL, "s2")
addr, proxyCred, _, err := s2.Loopback()
if err != nil {
t.Fatal(err)
}
ln, err := s1.Listen("tcp", ":8081")
if err != nil {
t.Fatal(err)
}
defer ln.Close()
auth := &proxy.Auth{User: "tsnet", Password: proxyCred}
socksDialer, err := proxy.SOCKS5("tcp", addr, auth, proxy.Direct)
if err != nil {
t.Fatal(err)
}
w, err := socksDialer.Dial("tcp", fmt.Sprintf("%s:8081", s1ip))
if err != nil {
t.Fatal(err)
}
r, err := ln.Accept()
if err != nil {
t.Fatal(err)
}
want := "hello"
if _, err := io.WriteString(w, want); err != nil {
t.Fatal(err)
}
got := make([]byte, len(want))
if _, err := io.ReadAtLeast(r, got, len(got)); err != nil {
t.Fatal(err)
}
t.Logf("got: %q", got)
if string(got) != want {
t.Errorf("got %q, want %q", got, want)
}
}
func TestTailscaleIPs(t *testing.T) {
controlURL := startControl(t)
tmp := t.TempDir()
tmps1 := filepath.Join(tmp, "s1")
os.MkdirAll(tmps1, 0755)
s1 := &Server{
Dir: tmps1,
ControlURL: controlURL,
Hostname: "s1",
Store: new(mem.Store),
Ephemeral: true,
}
defer s1.Close()
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
s1status, err := s1.Up(ctx)
if err != nil {
t.Fatal(err)
}
var upIp4, upIp6 netip.Addr
for _, ip := range s1status.TailscaleIPs {
if ip.Is6() {
upIp6 = ip
}
if ip.Is4() {
upIp4 = ip
}
}
sIp4, sIp6 := s1.TailscaleIPs()
if !(upIp4 == sIp4 && upIp6 == sIp6) {
t.Errorf("s1.TailscaleIPs returned a different result than S1.Up, (%s, %s) != (%s, %s)",
sIp4, upIp4, sIp6, upIp6)
}
}
// TestListenerCleanup is a regression test to verify that s.Close doesn't
// deadlock if a listener is still open.
func TestListenerCleanup(t *testing.T) {
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
controlURL := startControl(t)
s1, _ := startServer(t, ctx, controlURL, "s1")
ln, err := s1.Listen("tcp", ":8081")
if err != nil {
t.Fatal(err)
}
if err := s1.Close(); err != nil {
t.Fatal(err)
}
if err := ln.Close(); !errors.Is(err, net.ErrClosed) {
t.Fatalf("second ln.Close error: %v, want net.ErrClosed", err)
}
}