mirror of
https://github.com/tailscale/tailscale.git
synced 2024-11-25 19:15:34 +00:00
da8def8e13
The //go:build syntax was introduced in Go 1.17: https://go.dev/doc/go1.17#build-lines gofmt has kept the +build and go:build lines in sync since then, but enough time has passed. Time to remove them. Done with: perl -i -npe 's,^// \+build.*\n,,' $(git grep -l -F '+build') Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
441 lines
10 KiB
Go
441 lines
10 KiB
Go
//go:build glidertests
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package ssh
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import (
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"bytes"
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"fmt"
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"io"
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"net"
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"testing"
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gossh "github.com/tailscale/golang-x-crypto/ssh"
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)
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func (srv *Server) serveOnce(l net.Listener) error {
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srv.ensureHandlers()
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if err := srv.ensureHostSigner(); err != nil {
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return err
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}
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conn, e := l.Accept()
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if e != nil {
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return e
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}
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srv.ChannelHandlers = map[string]ChannelHandler{
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"session": DefaultSessionHandler,
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"direct-tcpip": DirectTCPIPHandler,
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}
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srv.HandleConn(conn)
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return nil
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}
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func newLocalListener() net.Listener {
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l, err := net.Listen("tcp", "127.0.0.1:0")
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if err != nil {
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if l, err = net.Listen("tcp6", "[::1]:0"); err != nil {
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panic(fmt.Sprintf("failed to listen on a port: %v", err))
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}
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}
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return l
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}
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func newClientSession(t *testing.T, addr string, config *gossh.ClientConfig) (*gossh.Session, *gossh.Client, func()) {
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if config == nil {
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config = &gossh.ClientConfig{
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User: "testuser",
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Auth: []gossh.AuthMethod{
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gossh.Password("testpass"),
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},
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}
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}
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if config.HostKeyCallback == nil {
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config.HostKeyCallback = gossh.InsecureIgnoreHostKey()
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}
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client, err := gossh.Dial("tcp", addr, config)
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if err != nil {
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t.Fatal(err)
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}
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session, err := client.NewSession()
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if err != nil {
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t.Fatal(err)
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}
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return session, client, func() {
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session.Close()
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client.Close()
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}
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}
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func newTestSession(t *testing.T, srv *Server, cfg *gossh.ClientConfig) (*gossh.Session, *gossh.Client, func()) {
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l := newLocalListener()
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go srv.serveOnce(l)
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return newClientSession(t, l.Addr().String(), cfg)
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}
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func TestStdout(t *testing.T) {
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t.Parallel()
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testBytes := []byte("Hello world\n")
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session, _, cleanup := newTestSession(t, &Server{
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Handler: func(s Session) {
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s.Write(testBytes)
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},
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}, nil)
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defer cleanup()
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var stdout bytes.Buffer
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session.Stdout = &stdout
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if err := session.Run(""); err != nil {
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t.Fatal(err)
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}
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if !bytes.Equal(stdout.Bytes(), testBytes) {
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t.Fatalf("stdout = %#v; want %#v", stdout.Bytes(), testBytes)
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}
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}
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func TestStderr(t *testing.T) {
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t.Parallel()
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testBytes := []byte("Hello world\n")
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session, _, cleanup := newTestSession(t, &Server{
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Handler: func(s Session) {
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s.Stderr().Write(testBytes)
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},
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}, nil)
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defer cleanup()
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var stderr bytes.Buffer
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session.Stderr = &stderr
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if err := session.Run(""); err != nil {
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t.Fatal(err)
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}
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if !bytes.Equal(stderr.Bytes(), testBytes) {
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t.Fatalf("stderr = %#v; want %#v", stderr.Bytes(), testBytes)
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}
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}
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func TestStdin(t *testing.T) {
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t.Parallel()
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testBytes := []byte("Hello world\n")
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session, _, cleanup := newTestSession(t, &Server{
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Handler: func(s Session) {
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io.Copy(s, s) // stdin back into stdout
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},
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}, nil)
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defer cleanup()
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var stdout bytes.Buffer
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session.Stdout = &stdout
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session.Stdin = bytes.NewBuffer(testBytes)
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if err := session.Run(""); err != nil {
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t.Fatal(err)
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}
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if !bytes.Equal(stdout.Bytes(), testBytes) {
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t.Fatalf("stdout = %#v; want %#v given stdin = %#v", stdout.Bytes(), testBytes, testBytes)
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}
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}
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func TestUser(t *testing.T) {
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t.Parallel()
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testUser := []byte("progrium")
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session, _, cleanup := newTestSession(t, &Server{
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Handler: func(s Session) {
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io.WriteString(s, s.User())
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},
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}, &gossh.ClientConfig{
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User: string(testUser),
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})
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defer cleanup()
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var stdout bytes.Buffer
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session.Stdout = &stdout
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if err := session.Run(""); err != nil {
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t.Fatal(err)
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}
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if !bytes.Equal(stdout.Bytes(), testUser) {
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t.Fatalf("stdout = %#v; want %#v given user = %#v", stdout.Bytes(), testUser, string(testUser))
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}
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}
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func TestDefaultExitStatusZero(t *testing.T) {
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t.Parallel()
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session, _, cleanup := newTestSession(t, &Server{
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Handler: func(s Session) {
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// noop
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},
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}, nil)
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defer cleanup()
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err := session.Run("")
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if err != nil {
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t.Fatalf("expected nil but got %v", err)
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}
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}
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func TestExplicitExitStatusZero(t *testing.T) {
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t.Parallel()
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session, _, cleanup := newTestSession(t, &Server{
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Handler: func(s Session) {
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s.Exit(0)
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},
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}, nil)
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defer cleanup()
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err := session.Run("")
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if err != nil {
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t.Fatalf("expected nil but got %v", err)
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}
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}
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func TestExitStatusNonZero(t *testing.T) {
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t.Parallel()
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session, _, cleanup := newTestSession(t, &Server{
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Handler: func(s Session) {
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s.Exit(1)
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},
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}, nil)
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defer cleanup()
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err := session.Run("")
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e, ok := err.(*gossh.ExitError)
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if !ok {
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t.Fatalf("expected ExitError but got %T", err)
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}
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if e.ExitStatus() != 1 {
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t.Fatalf("exit-status = %#v; want %#v", e.ExitStatus(), 1)
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}
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}
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func TestPty(t *testing.T) {
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t.Parallel()
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term := "xterm"
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winWidth := 40
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winHeight := 80
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done := make(chan bool)
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session, _, cleanup := newTestSession(t, &Server{
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Handler: func(s Session) {
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ptyReq, _, isPty := s.Pty()
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if !isPty {
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t.Fatalf("expected pty but none requested")
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}
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if ptyReq.Term != term {
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t.Fatalf("expected term %#v but got %#v", term, ptyReq.Term)
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}
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if ptyReq.Window.Width != winWidth {
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t.Fatalf("expected window width %#v but got %#v", winWidth, ptyReq.Window.Width)
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}
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if ptyReq.Window.Height != winHeight {
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t.Fatalf("expected window height %#v but got %#v", winHeight, ptyReq.Window.Height)
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}
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close(done)
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},
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}, nil)
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defer cleanup()
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if err := session.RequestPty(term, winHeight, winWidth, gossh.TerminalModes{}); err != nil {
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t.Fatalf("expected nil but got %v", err)
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}
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if err := session.Shell(); err != nil {
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t.Fatalf("expected nil but got %v", err)
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}
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<-done
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}
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func TestPtyResize(t *testing.T) {
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t.Parallel()
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winch0 := Window{Width: 40, Height: 80}
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winch1 := Window{Width: 80, Height: 160}
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winch2 := Window{Width: 20, Height: 40}
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winches := make(chan Window)
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done := make(chan bool)
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session, _, cleanup := newTestSession(t, &Server{
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Handler: func(s Session) {
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ptyReq, winCh, isPty := s.Pty()
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if !isPty {
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t.Fatalf("expected pty but none requested")
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}
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if ptyReq.Window != winch0 {
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t.Fatalf("expected window %#v but got %#v", winch0, ptyReq.Window)
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}
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for win := range winCh {
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winches <- win
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}
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close(done)
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},
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}, nil)
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defer cleanup()
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// winch0
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if err := session.RequestPty("xterm", winch0.Height, winch0.Width, gossh.TerminalModes{}); err != nil {
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t.Fatalf("expected nil but got %v", err)
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}
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if err := session.Shell(); err != nil {
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t.Fatalf("expected nil but got %v", err)
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}
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gotWinch := <-winches
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if gotWinch != winch0 {
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t.Fatalf("expected window %#v but got %#v", winch0, gotWinch)
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}
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// winch1
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winchMsg := struct{ w, h uint32 }{uint32(winch1.Width), uint32(winch1.Height)}
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ok, err := session.SendRequest("window-change", true, gossh.Marshal(&winchMsg))
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if err == nil && !ok {
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t.Fatalf("unexpected error or bad reply on send request")
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}
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gotWinch = <-winches
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if gotWinch != winch1 {
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t.Fatalf("expected window %#v but got %#v", winch1, gotWinch)
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}
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// winch2
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winchMsg = struct{ w, h uint32 }{uint32(winch2.Width), uint32(winch2.Height)}
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ok, err = session.SendRequest("window-change", true, gossh.Marshal(&winchMsg))
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if err == nil && !ok {
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t.Fatalf("unexpected error or bad reply on send request")
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}
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gotWinch = <-winches
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if gotWinch != winch2 {
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t.Fatalf("expected window %#v but got %#v", winch2, gotWinch)
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}
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session.Close()
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<-done
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}
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func TestSignals(t *testing.T) {
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t.Parallel()
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// errChan lets us get errors back from the session
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errChan := make(chan error, 5)
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// doneChan lets us specify that we should exit.
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doneChan := make(chan interface{})
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session, _, cleanup := newTestSession(t, &Server{
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Handler: func(s Session) {
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// We need to use a buffered channel here, otherwise it's possible for the
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// second call to Signal to get discarded.
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signals := make(chan Signal, 2)
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s.Signals(signals)
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select {
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case sig := <-signals:
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if sig != SIGINT {
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errChan <- fmt.Errorf("expected signal %v but got %v", SIGINT, sig)
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return
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}
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case <-doneChan:
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errChan <- fmt.Errorf("Unexpected done")
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return
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}
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select {
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case sig := <-signals:
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if sig != SIGKILL {
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errChan <- fmt.Errorf("expected signal %v but got %v", SIGKILL, sig)
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return
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}
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case <-doneChan:
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errChan <- fmt.Errorf("Unexpected done")
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return
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}
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},
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}, nil)
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defer cleanup()
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go func() {
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session.Signal(gossh.SIGINT)
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session.Signal(gossh.SIGKILL)
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}()
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go func() {
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errChan <- session.Run("")
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}()
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err := <-errChan
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close(doneChan)
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if err != nil {
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t.Fatalf("expected nil but got %v", err)
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}
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}
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func TestBreakWithChanRegistered(t *testing.T) {
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t.Parallel()
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// errChan lets us get errors back from the session
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errChan := make(chan error, 5)
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// doneChan lets us specify that we should exit.
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doneChan := make(chan interface{})
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breakChan := make(chan bool)
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readyToReceiveBreak := make(chan bool)
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session, _, cleanup := newTestSession(t, &Server{
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Handler: func(s Session) {
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s.Break(breakChan) // register a break channel with the session
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readyToReceiveBreak <- true
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select {
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case <-breakChan:
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io.WriteString(s, "break")
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case <-doneChan:
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errChan <- fmt.Errorf("Unexpected done")
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return
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}
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},
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}, nil)
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defer cleanup()
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var stdout bytes.Buffer
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session.Stdout = &stdout
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go func() {
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errChan <- session.Run("")
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}()
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<-readyToReceiveBreak
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ok, err := session.SendRequest("break", true, nil)
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if err != nil {
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t.Fatalf("expected nil but got %v", err)
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}
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if ok != true {
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t.Fatalf("expected true but got %v", ok)
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}
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err = <-errChan
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close(doneChan)
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if err != nil {
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t.Fatalf("expected nil but got %v", err)
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}
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if !bytes.Equal(stdout.Bytes(), []byte("break")) {
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t.Fatalf("stdout = %#v, expected 'break'", stdout.Bytes())
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}
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}
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func TestBreakWithoutChanRegistered(t *testing.T) {
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t.Parallel()
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// errChan lets us get errors back from the session
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errChan := make(chan error, 5)
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// doneChan lets us specify that we should exit.
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doneChan := make(chan interface{})
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waitUntilAfterBreakSent := make(chan bool)
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session, _, cleanup := newTestSession(t, &Server{
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Handler: func(s Session) {
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<-waitUntilAfterBreakSent
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},
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}, nil)
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defer cleanup()
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var stdout bytes.Buffer
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session.Stdout = &stdout
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go func() {
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errChan <- session.Run("")
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}()
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ok, err := session.SendRequest("break", true, nil)
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if err != nil {
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t.Fatalf("expected nil but got %v", err)
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}
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if ok != false {
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t.Fatalf("expected false but got %v", ok)
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}
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waitUntilAfterBreakSent <- true
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err = <-errChan
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close(doneChan)
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if err != nil {
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t.Fatalf("expected nil but got %v", err)
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}
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}
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