You cannot select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
tailscale/ipn/ipnlocal/peerapi_test.go

753 lines
18 KiB
Go

This file contains ambiguous Unicode characters!

This file contains ambiguous Unicode characters that may be confused with others in your current locale. If your use case is intentional and legitimate, you can safely ignore this warning. Use the Escape button to highlight these characters.

// Copyright (c) 2021 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 ipnlocal
import (
"bytes"
"errors"
"fmt"
"io"
"io/fs"
"math/rand"
"net/http"
"net/http/httptest"
"net/netip"
"os"
"path/filepath"
"runtime"
"strings"
"testing"
"go4.org/netipx"
"tailscale.com/ipn"
"tailscale.com/ipn/store/mem"
"tailscale.com/tailcfg"
"tailscale.com/tstest"
"tailscale.com/types/logger"
"tailscale.com/types/netmap"
"tailscale.com/util/must"
"tailscale.com/wgengine"
"tailscale.com/wgengine/filter"
)
type peerAPITestEnv struct {
ph *peerAPIHandler
rr *httptest.ResponseRecorder
logBuf tstest.MemLogger
}
type check func(*testing.T, *peerAPITestEnv)
func checks(vv ...check) []check { return vv }
func httpStatus(wantStatus int) check {
return func(t *testing.T, e *peerAPITestEnv) {
if res := e.rr.Result(); res.StatusCode != wantStatus {
t.Errorf("HTTP response code = %v; want %v", res.Status, wantStatus)
}
}
}
func bodyContains(sub string) check {
return func(t *testing.T, e *peerAPITestEnv) {
if body := e.rr.Body.String(); !strings.Contains(body, sub) {
t.Errorf("HTTP response body does not contain %q; got: %s", sub, body)
}
}
}
func bodyNotContains(sub string) check {
return func(t *testing.T, e *peerAPITestEnv) {
if body := e.rr.Body.String(); strings.Contains(body, sub) {
t.Errorf("HTTP response body unexpectedly contains %q; got: %s", sub, body)
}
}
}
func fileHasSize(name string, size int) check {
return func(t *testing.T, e *peerAPITestEnv) {
root := e.ph.ps.rootDir
if root == "" {
t.Errorf("no rootdir; can't check whether %q has size %v", name, size)
return
}
path := filepath.Join(root, name)
if fi, err := os.Stat(path); err != nil {
t.Errorf("fileHasSize(%q, %v): %v", name, size, err)
} else if fi.Size() != int64(size) {
t.Errorf("file %q has size %v; want %v", name, fi.Size(), size)
}
}
}
func fileHasContents(name string, want string) check {
return func(t *testing.T, e *peerAPITestEnv) {
root := e.ph.ps.rootDir
if root == "" {
t.Errorf("no rootdir; can't check contents of %q", name)
return
}
path := filepath.Join(root, name)
got, err := os.ReadFile(path)
if err != nil {
t.Errorf("fileHasContents: %v", err)
return
}
if string(got) != want {
t.Errorf("file contents = %q; want %q", got, want)
}
}
}
func hexAll(v string) string {
var sb strings.Builder
for i := 0; i < len(v); i++ {
fmt.Fprintf(&sb, "%%%02x", v[i])
}
return sb.String()
}
func TestHandlePeerAPI(t *testing.T) {
const nodeFQDN = "self-node.tail-scale.ts.net."
tests := []struct {
name string
isSelf bool // the peer sending the request is owned by us
capSharing bool // self node has file sharing capability
debugCap bool // self node has debug capability
omitRoot bool // don't configure
req *http.Request
checks []check
}{
{
name: "not_peer_api",
isSelf: true,
capSharing: true,
req: httptest.NewRequest("GET", "/", nil),
checks: checks(
httpStatus(200),
bodyContains("This is my Tailscale device."),
bodyContains("You are the owner of this node."),
),
},
{
name: "not_peer_api_not_owner",
isSelf: false,
capSharing: true,
req: httptest.NewRequest("GET", "/", nil),
checks: checks(
httpStatus(200),
bodyContains("This is my Tailscale device."),
bodyNotContains("You are the owner of this node."),
),
},
{
name: "goroutines/deny-self-no-cap",
isSelf: true,
debugCap: false,
req: httptest.NewRequest("GET", "/v0/goroutines", nil),
checks: checks(httpStatus(403)),
},
{
name: "goroutines/deny-nonself",
isSelf: false,
debugCap: true,
req: httptest.NewRequest("GET", "/v0/goroutines", nil),
checks: checks(httpStatus(403)),
},
{
name: "goroutines/accept-self",
isSelf: true,
debugCap: true,
req: httptest.NewRequest("GET", "/v0/goroutines", nil),
checks: checks(
httpStatus(200),
bodyContains("ServeHTTP"),
),
},
{
name: "reject_non_owner_put",
isSelf: false,
capSharing: true,
req: httptest.NewRequest("PUT", "/v0/put/foo", nil),
checks: checks(
httpStatus(http.StatusForbidden),
bodyContains("Taildrop access denied"),
),
},
{
name: "owner_without_cap",
isSelf: true,
capSharing: false,
req: httptest.NewRequest("PUT", "/v0/put/foo", nil),
checks: checks(
httpStatus(http.StatusForbidden),
bodyContains("file sharing not enabled by Tailscale admin"),
),
},
{
name: "owner_with_cap_no_rootdir",
omitRoot: true,
isSelf: true,
capSharing: true,
req: httptest.NewRequest("PUT", "/v0/put/foo", nil),
checks: checks(
httpStatus(http.StatusInternalServerError),
bodyContains("Taildrop disabled; no storage directory"),
),
},
{
name: "bad_method",
isSelf: true,
capSharing: true,
req: httptest.NewRequest("POST", "/v0/put/foo", nil),
checks: checks(
httpStatus(405),
bodyContains("expected method PUT"),
),
},
{
name: "put_zero_length",
isSelf: true,
capSharing: true,
req: httptest.NewRequest("PUT", "/v0/put/foo", nil),
checks: checks(
httpStatus(200),
bodyContains("{}"),
fileHasSize("foo", 0),
fileHasContents("foo", ""),
),
},
{
name: "put_non_zero_length_content_length",
isSelf: true,
capSharing: true,
req: httptest.NewRequest("PUT", "/v0/put/foo", strings.NewReader("contents")),
checks: checks(
httpStatus(200),
bodyContains("{}"),
fileHasSize("foo", len("contents")),
fileHasContents("foo", "contents"),
),
},
{
name: "put_non_zero_length_chunked",
isSelf: true,
capSharing: true,
req: httptest.NewRequest("PUT", "/v0/put/foo", struct{ io.Reader }{strings.NewReader("contents")}),
checks: checks(
httpStatus(200),
bodyContains("{}"),
fileHasSize("foo", len("contents")),
fileHasContents("foo", "contents"),
),
},
{
name: "bad_filename_partial",
isSelf: true,
capSharing: true,
req: httptest.NewRequest("PUT", "/v0/put/foo.partial", nil),
checks: checks(
httpStatus(400),
bodyContains("bad filename"),
),
},
{
name: "bad_filename_deleted",
isSelf: true,
capSharing: true,
req: httptest.NewRequest("PUT", "/v0/put/foo.deleted", nil),
checks: checks(
httpStatus(400),
bodyContains("bad filename"),
),
},
{
name: "bad_filename_dot",
isSelf: true,
capSharing: true,
req: httptest.NewRequest("PUT", "/v0/put/.", nil),
checks: checks(
httpStatus(400),
bodyContains("bad filename"),
),
},
{
name: "bad_filename_empty",
isSelf: true,
capSharing: true,
req: httptest.NewRequest("PUT", "/v0/put/", nil),
checks: checks(
httpStatus(400),
bodyContains("empty filename"),
),
},
{
name: "bad_filename_slash",
isSelf: true,
capSharing: true,
req: httptest.NewRequest("PUT", "/v0/put/foo/bar", nil),
checks: checks(
httpStatus(400),
bodyContains("directories not supported"),
),
},
{
name: "bad_filename_encoded_dot",
isSelf: true,
capSharing: true,
req: httptest.NewRequest("PUT", "/v0/put/"+hexAll("."), nil),
checks: checks(
httpStatus(400),
bodyContains("bad filename"),
),
},
{
name: "bad_filename_encoded_slash",
isSelf: true,
capSharing: true,
req: httptest.NewRequest("PUT", "/v0/put/"+hexAll("/"), nil),
checks: checks(
httpStatus(400),
bodyContains("bad filename"),
),
},
{
name: "bad_filename_encoded_backslash",
isSelf: true,
capSharing: true,
req: httptest.NewRequest("PUT", "/v0/put/"+hexAll("\\"), nil),
checks: checks(
httpStatus(400),
bodyContains("bad filename"),
),
},
{
name: "bad_filename_encoded_dotdot",
isSelf: true,
capSharing: true,
req: httptest.NewRequest("PUT", "/v0/put/"+hexAll(".."), nil),
checks: checks(
httpStatus(400),
bodyContains("bad filename"),
),
},
{
name: "bad_filename_encoded_dotdot_out",
isSelf: true,
capSharing: true,
req: httptest.NewRequest("PUT", "/v0/put/"+hexAll("foo/../../../../../etc/passwd"), nil),
checks: checks(
httpStatus(400),
bodyContains("bad filename"),
),
},
{
name: "put_spaces_and_caps",
isSelf: true,
capSharing: true,
req: httptest.NewRequest("PUT", "/v0/put/"+hexAll("Foo Bar.dat"), strings.NewReader("baz")),
checks: checks(
httpStatus(200),
bodyContains("{}"),
fileHasContents("Foo Bar.dat", "baz"),
),
},
{
name: "put_unicode",
isSelf: true,
capSharing: true,
req: httptest.NewRequest("PUT", "/v0/put/"+hexAll("Томас и его друзья.mp3"), strings.NewReader("главный озорник")),
checks: checks(
httpStatus(200),
bodyContains("{}"),
fileHasContents("Томас и его друзья.mp3", "главный озорник"),
),
},
{
name: "put_invalid_utf8",
isSelf: true,
capSharing: true,
req: httptest.NewRequest("PUT", "/v0/put/"+(hexAll("😜")[:3]), nil),
checks: checks(
httpStatus(400),
bodyContains("bad filename"),
),
},
{
name: "put_invalid_null",
isSelf: true,
capSharing: true,
req: httptest.NewRequest("PUT", "/v0/put/%00", nil),
checks: checks(
httpStatus(400),
bodyContains("bad filename"),
),
},
{
name: "put_invalid_non_printable",
isSelf: true,
capSharing: true,
req: httptest.NewRequest("PUT", "/v0/put/%01", nil),
checks: checks(
httpStatus(400),
bodyContains("bad filename"),
),
},
{
name: "put_invalid_colon",
isSelf: true,
capSharing: true,
req: httptest.NewRequest("PUT", "/v0/put/"+hexAll("nul:"), nil),
checks: checks(
httpStatus(400),
bodyContains("bad filename"),
),
},
{
name: "put_invalid_surrounding_whitespace",
isSelf: true,
capSharing: true,
req: httptest.NewRequest("PUT", "/v0/put/"+hexAll(" foo "), nil),
checks: checks(
httpStatus(400),
bodyContains("bad filename"),
),
},
{
name: "host-val/bad-ip",
isSelf: true,
debugCap: true,
req: httptest.NewRequest("GET", "http://12.23.45.66:1234/v0/env", nil),
checks: checks(
httpStatus(403),
),
},
{
name: "host-val/no-port",
isSelf: true,
debugCap: true,
req: httptest.NewRequest("GET", "http://100.100.100.101/v0/env", nil),
checks: checks(
httpStatus(403),
),
},
{
name: "host-val/peer",
isSelf: true,
debugCap: true,
req: httptest.NewRequest("GET", "http://peer/v0/env", nil),
checks: checks(
httpStatus(200),
),
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
selfNode := &tailcfg.Node{
Addresses: []netip.Prefix{
netip.MustParsePrefix("100.100.100.101/32"),
},
}
if tt.debugCap {
selfNode.Capabilities = append(selfNode.Capabilities, tailcfg.CapabilityDebug)
}
var e peerAPITestEnv
lb := &LocalBackend{
logf: e.logBuf.Logf,
capFileSharing: tt.capSharing,
netMap: &netmap.NetworkMap{SelfNode: selfNode},
}
e.ph = &peerAPIHandler{
isSelf: tt.isSelf,
selfNode: selfNode,
peerNode: &tailcfg.Node{
ComputedName: "some-peer-name",
},
ps: &peerAPIServer{
b: lb,
},
}
var rootDir string
if !tt.omitRoot {
rootDir = t.TempDir()
e.ph.ps.rootDir = rootDir
}
e.rr = httptest.NewRecorder()
if tt.req.Host == "example.com" {
tt.req.Host = "100.100.100.101:12345"
}
e.ph.ServeHTTP(e.rr, tt.req)
for _, f := range tt.checks {
f(t, &e)
}
if t.Failed() && rootDir != "" {
t.Logf("Contents of %s:", rootDir)
des, _ := fs.ReadDir(os.DirFS(rootDir), ".")
for _, de := range des {
fi, err := de.Info()
if err != nil {
t.Log(err)
} else {
t.Logf(" %v %5d %s", fi.Mode(), fi.Size(), de.Name())
}
}
}
})
}
}
// Windows likes to hold on to file descriptors for some indeterminate
// amount of time after you close them and not let you delete them for
// a bit. So test that we work around that sufficiently.
func TestFileDeleteRace(t *testing.T) {
dir := t.TempDir()
ps := &peerAPIServer{
b: &LocalBackend{
logf: t.Logf,
capFileSharing: true,
},
rootDir: dir,
}
ph := &peerAPIHandler{
isSelf: true,
peerNode: &tailcfg.Node{
ComputedName: "some-peer-name",
},
selfNode: &tailcfg.Node{
Addresses: []netip.Prefix{netip.MustParsePrefix("100.100.100.101/32")},
},
ps: ps,
}
buf := make([]byte, 2<<20)
for i := 0; i < 30; i++ {
rr := httptest.NewRecorder()
ph.ServeHTTP(rr, httptest.NewRequest("PUT", "http://100.100.100.101:123/v0/put/foo.txt", bytes.NewReader(buf[:rand.Intn(len(buf))])))
if res := rr.Result(); res.StatusCode != 200 {
t.Fatal(res.Status)
}
wfs, err := ps.WaitingFiles()
if err != nil {
t.Fatal(err)
}
if len(wfs) != 1 {
t.Fatalf("waiting files = %d; want 1", len(wfs))
}
if err := ps.DeleteFile("foo.txt"); err != nil {
t.Fatal(err)
}
wfs, err = ps.WaitingFiles()
if err != nil {
t.Fatal(err)
}
if len(wfs) != 0 {
t.Fatalf("waiting files = %d; want 0", len(wfs))
}
}
}
// Tests "foo.jpg.deleted" marks (for Windows).
func TestDeletedMarkers(t *testing.T) {
dir := t.TempDir()
ps := &peerAPIServer{
b: &LocalBackend{
logf: t.Logf,
capFileSharing: true,
},
rootDir: dir,
}
nothingWaiting := func() {
t.Helper()
ps.knownEmpty.Store(false)
if ps.hasFilesWaiting() {
t.Fatal("unexpected files waiting")
}
}
touch := func(base string) {
t.Helper()
if err := touchFile(filepath.Join(dir, base)); err != nil {
t.Fatal(err)
}
}
wantEmptyTempDir := func() {
t.Helper()
if fis, err := os.ReadDir(dir); err != nil {
t.Fatal(err)
} else if len(fis) > 0 && runtime.GOOS != "windows" {
for _, fi := range fis {
t.Errorf("unexpected file in tempdir: %q", fi.Name())
}
}
}
nothingWaiting()
wantEmptyTempDir()
touch("foo.jpg.deleted")
nothingWaiting()
wantEmptyTempDir()
touch("foo.jpg.deleted")
touch("foo.jpg")
nothingWaiting()
wantEmptyTempDir()
touch("foo.jpg.deleted")
touch("foo.jpg")
wf, err := ps.WaitingFiles()
if err != nil {
t.Fatal(err)
}
if len(wf) != 0 {
t.Fatalf("WaitingFiles = %d; want 0", len(wf))
}
wantEmptyTempDir()
touch("foo.jpg.deleted")
touch("foo.jpg")
if rc, _, err := ps.OpenFile("foo.jpg"); err == nil {
rc.Close()
t.Fatal("unexpected foo.jpg open")
}
wantEmptyTempDir()
// And verify basics still work in non-deleted cases.
touch("foo.jpg")
touch("bar.jpg.deleted")
if wf, err := ps.WaitingFiles(); err != nil {
t.Error(err)
} else if len(wf) != 1 {
t.Errorf("WaitingFiles = %d; want 1", len(wf))
} else if wf[0].Name != "foo.jpg" {
t.Errorf("unexpected waiting file %+v", wf[0])
}
if rc, _, err := ps.OpenFile("foo.jpg"); err != nil {
t.Fatal(err)
} else {
rc.Close()
}
}
func TestPeerAPIReplyToDNSQueries(t *testing.T) {
var h peerAPIHandler
h.isSelf = true
if !h.replyToDNSQueries() {
t.Errorf("for isSelf = false; want true")
}
h.isSelf = false
h.remoteAddr = netip.MustParseAddrPort("100.150.151.152:12345")
eng, _ := wgengine.NewFakeUserspaceEngine(logger.Discard, 0)
pm := must.Get(newProfileManager(new(mem.Store), t.Logf, ""))
h.ps = &peerAPIServer{
b: &LocalBackend{
e: eng,
pm: pm,
store: pm.Store(),
},
}
if h.ps.b.OfferingExitNode() {
t.Fatal("unexpectedly offering exit node")
}
h.ps.b.pm.SetPrefs((&ipn.Prefs{
AdvertiseRoutes: []netip.Prefix{
netip.MustParsePrefix("0.0.0.0/0"),
netip.MustParsePrefix("::/0"),
},
}).View())
if !h.ps.b.OfferingExitNode() {
t.Fatal("unexpectedly not offering exit node")
}
if h.replyToDNSQueries() {
t.Errorf("unexpectedly doing DNS without filter")
}
h.ps.b.setFilter(filter.NewAllowNone(logger.Discard, new(netipx.IPSet)))
if h.replyToDNSQueries() {
t.Errorf("unexpectedly doing DNS without filter")
}
f := filter.NewAllowAllForTest(logger.Discard)
h.ps.b.setFilter(f)
if !h.replyToDNSQueries() {
t.Errorf("unexpectedly deny; wanted to be a DNS server")
}
// Also test IPv6.
h.remoteAddr = netip.MustParseAddrPort("[fe70::1]:12345")
if !h.replyToDNSQueries() {
t.Errorf("unexpectedly IPv6 deny; wanted to be a DNS server")
}
}
func TestRedactErr(t *testing.T) {
testCases := []struct {
name string
err func() error
want string
}{
{
name: "PathError",
err: func() error {
return &os.PathError{
Op: "open",
Path: "/tmp/sensitive.txt",
Err: fs.ErrNotExist,
}
},
want: `open redacted.41360718: file does not exist`,
},
{
name: "LinkError",
err: func() error {
return &os.LinkError{
Op: "symlink",
Old: "/tmp/sensitive.txt",
New: "/tmp/othersensitive.txt",
Err: fs.ErrNotExist,
}
},
want: `symlink redacted.41360718 redacted.6bcf093a: file does not exist`,
},
{
name: "something else",
err: func() error { return errors.New("i am another error type") },
want: `i am another error type`,
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
// For debugging
var i int
for err := tc.err(); err != nil; err = errors.Unwrap(err) {
t.Logf("%d: %T @ %p", i, err, err)
i++
}
t.Run("Root", func(t *testing.T) {
got := redactErr(tc.err()).Error()
if got != tc.want {
t.Errorf("err = %q; want %q", got, tc.want)
}
})
t.Run("Wrapped", func(t *testing.T) {
wrapped := fmt.Errorf("wrapped error: %w", tc.err())
want := "wrapped error: " + tc.want
got := redactErr(wrapped).Error()
if got != want {
t.Errorf("err = %q; want %q", got, want)
}
})
})
}
}