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ssh_test.go
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//go:build !windows && !386
// +build !windows,!386
// skipping 386 because lager uses UInt64 in Session()
// skipping windows because Unix/Linux only syscall in test.
// should refactor out the conflicts so we could test this package in multi platforms.
package sshCmd_test
import (
"errors"
"fmt"
"io"
"net"
"os"
"syscall"
"time"
"code.cloudfoundry.org/cli/cf/models"
sshCmd "code.cloudfoundry.org/cli/cf/ssh"
"code.cloudfoundry.org/cli/cf/ssh/options"
"code.cloudfoundry.org/cli/cf/ssh/sshfakes"
"code.cloudfoundry.org/cli/cf/ssh/terminal"
"code.cloudfoundry.org/cli/cf/ssh/terminal/terminalfakes"
"code.cloudfoundry.org/diego-ssh/server"
fake_server "code.cloudfoundry.org/diego-ssh/server/fakes"
"code.cloudfoundry.org/diego-ssh/test_helpers"
"code.cloudfoundry.org/diego-ssh/test_helpers/fake_io"
"code.cloudfoundry.org/diego-ssh/test_helpers/fake_net"
"code.cloudfoundry.org/diego-ssh/test_helpers/fake_ssh"
"code.cloudfoundry.org/lager/lagertest"
"github.com/kr/pty"
"github.com/moby/term"
"golang.org/x/crypto/ssh"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
)
var _ = Describe("SSH", func() {
var (
fakeTerminalHelper *terminalfakes.FakeTerminalHelper
fakeListenerFactory *sshfakes.FakeListenerFactory
fakeConnection *fake_ssh.FakeConn
fakeSecureClient *sshfakes.FakeSecureClient
fakeSecureDialer *sshfakes.FakeSecureDialer
fakeSecureSession *sshfakes.FakeSecureSession
terminalHelper terminal.TerminalHelper
keepAliveDuration time.Duration
secureShell sshCmd.SecureShell
stdinPipe *fake_io.FakeWriteCloser
currentApp models.Application
sshEndpointFingerprint string
sshEndpoint string
token string
)
BeforeEach(func() {
fakeTerminalHelper = new(terminalfakes.FakeTerminalHelper)
terminalHelper = terminal.DefaultHelper()
fakeListenerFactory = new(sshfakes.FakeListenerFactory)
fakeListenerFactory.ListenStub = net.Listen
keepAliveDuration = 30 * time.Second
currentApp = models.Application{}
sshEndpoint = ""
sshEndpointFingerprint = ""
token = ""
fakeConnection = new(fake_ssh.FakeConn)
fakeSecureClient = new(sshfakes.FakeSecureClient)
fakeSecureDialer = new(sshfakes.FakeSecureDialer)
fakeSecureSession = new(sshfakes.FakeSecureSession)
fakeSecureDialer.DialReturns(fakeSecureClient, nil)
fakeSecureClient.NewSessionReturns(fakeSecureSession, nil)
fakeSecureClient.ConnReturns(fakeConnection)
stdinPipe = &fake_io.FakeWriteCloser{}
stdinPipe.WriteStub = func(p []byte) (int, error) {
return len(p), nil
}
stdoutPipe := &fake_io.FakeReader{}
stdoutPipe.ReadStub = func(p []byte) (int, error) {
return 0, io.EOF
}
stderrPipe := &fake_io.FakeReader{}
stderrPipe.ReadStub = func(p []byte) (int, error) {
return 0, io.EOF
}
fakeSecureSession.StdinPipeReturns(stdinPipe, nil)
fakeSecureSession.StdoutPipeReturns(stdoutPipe, nil)
fakeSecureSession.StderrPipeReturns(stderrPipe, nil)
})
JustBeforeEach(func() {
secureShell = sshCmd.NewSecureShell(
fakeSecureDialer,
terminalHelper,
fakeListenerFactory,
keepAliveDuration,
currentApp,
sshEndpointFingerprint,
sshEndpoint,
token,
)
})
Describe("Validation", func() {
var connectErr error
var opts *options.SSHOptions
BeforeEach(func() {
opts = &options.SSHOptions{
AppName: "app-1",
}
})
JustBeforeEach(func() {
connectErr = secureShell.Connect(opts)
})
Context("when the app model and endpoint info are successfully acquired", func() {
BeforeEach(func() {
token = ""
currentApp.State = "STARTED"
})
Context("when the app is not in the 'STARTED' state", func() {
BeforeEach(func() {
currentApp.State = "STOPPED"
})
It("returns an error", func() {
Expect(connectErr).To(MatchError(MatchRegexp("Application.*not in the STARTED state")))
})
})
Context("when dialing fails", func() {
var dialError = errors.New("woops")
BeforeEach(func() {
fakeSecureDialer.DialReturns(nil, dialError)
})
It("returns the dial error", func() {
Expect(connectErr).To(Equal(dialError))
Expect(fakeSecureDialer.DialCallCount()).To(Equal(1))
})
})
})
})
Describe("InteractiveSession", func() {
var opts *options.SSHOptions
var sessionError error
var interactiveSessionInvoker func(secureShell sshCmd.SecureShell)
BeforeEach(func() {
sshEndpoint = "ssh.example.com:22"
opts = &options.SSHOptions{
AppName: "app-name",
Index: 2,
}
currentApp.State = "STARTED"
currentApp.GUID = "app-guid"
token = "bearer token"
interactiveSessionInvoker = func(secureShell sshCmd.SecureShell) {
sessionError = secureShell.InteractiveSession()
}
})
JustBeforeEach(func() {
connectErr := secureShell.Connect(opts)
Expect(connectErr).NotTo(HaveOccurred())
interactiveSessionInvoker(secureShell)
})
It("dials the correct endpoint as the correct user", func() {
Expect(fakeSecureDialer.DialCallCount()).To(Equal(1))
network, address, config := fakeSecureDialer.DialArgsForCall(0)
Expect(network).To(Equal("tcp"))
Expect(address).To(Equal("ssh.example.com:22"))
Expect(config.Auth).NotTo(BeEmpty())
Expect(config.User).To(Equal("cf:app-guid/2"))
Expect(config.HostKeyCallback).NotTo(BeNil())
})
Context("when host key validation is enabled", func() {
var callback func(hostname string, remote net.Addr, key ssh.PublicKey) error
var addr net.Addr
JustBeforeEach(func() {
Expect(fakeSecureDialer.DialCallCount()).To(Equal(1))
_, _, config := fakeSecureDialer.DialArgsForCall(0)
callback = config.HostKeyCallback
listener, err := net.Listen("tcp", "localhost:0")
Expect(err).NotTo(HaveOccurred())
addr = listener.Addr()
listener.Close()
})
Context("when the md5 fingerprint matches", func() {
BeforeEach(func() {
sshEndpointFingerprint = "41:ce:56:e6:9c:42:a9:c6:9e:68:ac:e3:4d:f6:38:79"
})
It("does not return an error", func() {
Expect(callback("", addr, TestHostKey.PublicKey())).ToNot(HaveOccurred())
})
})
Context("when the hex sha1 fingerprint matches", func() {
BeforeEach(func() {
sshEndpointFingerprint = "a8:e2:67:cb:ea:2a:6e:23:a1:72:ce:8f:07:92:15:ee:1f:82:f8:ca"
})
It("does not return an error", func() {
Expect(callback("", addr, TestHostKey.PublicKey())).ToNot(HaveOccurred())
})
})
Context("when the base64 sha256 fingerprint matches", func() {
BeforeEach(func() {
sshEndpointFingerprint = "sp/jrLuj66r+yrLDUKZdJU5tdzt4mq/UaSiNBjpgr+8"
})
It("does not return an error", func() {
Expect(callback("", addr, TestHostKey.PublicKey())).ToNot(HaveOccurred())
})
})
Context("when the base64 SHA256 fingerprint does not match", func() {
BeforeEach(func() {
sshEndpointFingerprint = "0000000000000000000000000000000000000000000"
})
It("returns an error'", func() {
err := callback("", addr, TestHostKey.PublicKey())
Expect(err).To(MatchError(MatchRegexp("Host key verification failed\\.")))
Expect(err).To(MatchError(MatchRegexp("The fingerprint of the received key was \".*\"")))
})
})
Context("when the hex SHA1 fingerprint does not match", func() {
BeforeEach(func() {
sshEndpointFingerprint = "00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00"
})
It("returns an error'", func() {
err := callback("", addr, TestHostKey.PublicKey())
Expect(err).To(MatchError(MatchRegexp("Host key verification failed\\.")))
Expect(err).To(MatchError(MatchRegexp("The fingerprint of the received key was \".*\"")))
})
})
Context("when the MD5 fingerprint does not match", func() {
BeforeEach(func() {
sshEndpointFingerprint = "00:00:00:00:00:00:00:00:00:00:00:00:00:00:00:00"
})
It("returns an error'", func() {
err := callback("", addr, TestHostKey.PublicKey())
Expect(err).To(MatchError(MatchRegexp("Host key verification failed\\.")))
Expect(err).To(MatchError(MatchRegexp("The fingerprint of the received key was \".*\"")))
})
})
Context("when no fingerprint is present in endpoint info", func() {
BeforeEach(func() {
sshEndpointFingerprint = ""
sshEndpoint = ""
})
It("returns an error'", func() {
err := callback("", addr, TestHostKey.PublicKey())
Expect(err).To(MatchError(MatchRegexp("Unable to verify identity of host\\.")))
Expect(err).To(MatchError(MatchRegexp("The fingerprint of the received key was \".*\"")))
})
})
Context("when the fingerprint length doesn't make sense", func() {
BeforeEach(func() {
sshEndpointFingerprint = "garbage"
})
It("returns an error", func() {
err := callback("", addr, TestHostKey.PublicKey())
Eventually(err).Should(MatchError(MatchRegexp("Unsupported host key fingerprint format")))
})
})
})
Context("when the skip host validation flag is set", func() {
BeforeEach(func() {
opts.SkipHostValidation = true
})
It("removes the HostKeyCallback from the client config", func() {
Expect(fakeSecureDialer.DialCallCount()).To(Equal(1))
_, _, config := fakeSecureDialer.DialArgsForCall(0)
Expect(config.HostKeyCallback("some-addr", nil, nil)).To(BeNil())
})
})
Context("when dialing is successful", func() {
BeforeEach(func() {
fakeTerminalHelper.StdStreamsStub = terminalHelper.StdStreams
terminalHelper = fakeTerminalHelper
})
It("creates a new secure shell session", func() {
Expect(fakeSecureClient.NewSessionCallCount()).To(Equal(1))
})
It("closes the session", func() {
Expect(fakeSecureSession.CloseCallCount()).To(Equal(1))
})
It("allocates standard streams", func() {
Expect(fakeTerminalHelper.StdStreamsCallCount()).To(Equal(1))
})
It("gets a stdin pipe for the session", func() {
Expect(fakeSecureSession.StdinPipeCallCount()).To(Equal(1))
})
Context("when getting the stdin pipe fails", func() {
BeforeEach(func() {
fakeSecureSession.StdinPipeReturns(nil, errors.New("woops"))
})
It("returns the error", func() {
Expect(sessionError).Should(MatchError("woops"))
})
})
It("gets a stdout pipe for the session", func() {
Expect(fakeSecureSession.StdoutPipeCallCount()).To(Equal(1))
})
Context("when getting the stdout pipe fails", func() {
BeforeEach(func() {
fakeSecureSession.StdoutPipeReturns(nil, errors.New("woops"))
})
It("returns the error", func() {
Expect(sessionError).Should(MatchError("woops"))
})
})
It("gets a stderr pipe for the session", func() {
Expect(fakeSecureSession.StderrPipeCallCount()).To(Equal(1))
})
Context("when getting the stderr pipe fails", func() {
BeforeEach(func() {
fakeSecureSession.StderrPipeReturns(nil, errors.New("woops"))
})
It("returns the error", func() {
Expect(sessionError).Should(MatchError("woops"))
})
})
})
Context("when stdin is a terminal", func() {
var pseudoterminal, terminal *os.File
BeforeEach(func() {
_, stdout, stderr := terminalHelper.StdStreams()
var err error
pseudoterminal, terminal, err = pty.Open()
Expect(err).NotTo(HaveOccurred())
fakeTerminalHelper.IsTerminalStub = terminalHelper.IsTerminal
fakeTerminalHelper.GetFdInfoStub = terminalHelper.GetFdInfo
fakeTerminalHelper.GetWinsizeStub = terminalHelper.GetWinsize
fakeTerminalHelper.StdStreamsReturns(terminal, stdout, stderr)
terminalHelper = fakeTerminalHelper
})
AfterEach(func() {
pseudoterminal.Close()
// terminal.Close() // race
})
Context("when a command is not specified", func() {
var terminalType string
BeforeEach(func() {
terminalType = os.Getenv("TERM")
os.Setenv("TERM", "test-terminal-type")
winsize := &term.Winsize{Width: 1024, Height: 256}
fakeTerminalHelper.GetWinsizeReturns(winsize, nil)
fakeSecureSession.ShellStub = func() error {
Expect(fakeTerminalHelper.SetRawTerminalCallCount()).To(Equal(1))
Expect(fakeTerminalHelper.RestoreTerminalCallCount()).To(Equal(0))
return nil
}
})
AfterEach(func() {
os.Setenv("TERM", terminalType)
})
It("requests a pty with the correct terminal type, window size, and modes", func() {
Expect(fakeSecureSession.RequestPtyCallCount()).To(Equal(1))
Expect(fakeTerminalHelper.GetWinsizeCallCount()).To(Equal(1))
termType, height, width, modes := fakeSecureSession.RequestPtyArgsForCall(0)
Expect(termType).To(Equal("test-terminal-type"))
Expect(height).To(Equal(256))
Expect(width).To(Equal(1024))
expectedModes := ssh.TerminalModes{
ssh.ECHO: 1,
ssh.TTY_OP_ISPEED: 115200,
ssh.TTY_OP_OSPEED: 115200,
}
Expect(modes).To(Equal(expectedModes))
})
Context("when the TERM environment variable is not set", func() {
BeforeEach(func() {
os.Unsetenv("TERM")
})
It("requests a pty with the default terminal type", func() {
Expect(fakeSecureSession.RequestPtyCallCount()).To(Equal(1))
termType, _, _, _ := fakeSecureSession.RequestPtyArgsForCall(0)
Expect(termType).To(Equal("xterm"))
})
})
It("puts the terminal into raw mode and restores it after running the shell", func() {
Expect(fakeSecureSession.ShellCallCount()).To(Equal(1))
Expect(fakeTerminalHelper.SetRawTerminalCallCount()).To(Equal(1))
Expect(fakeTerminalHelper.RestoreTerminalCallCount()).To(Equal(1))
})
Context("when the pty allocation fails", func() {
var ptyError error
BeforeEach(func() {
ptyError = errors.New("pty allocation error")
fakeSecureSession.RequestPtyReturns(ptyError)
})
It("returns the error", func() {
Expect(sessionError).To(Equal(ptyError))
})
})
Context("when placing the terminal into raw mode fails", func() {
BeforeEach(func() {
fakeTerminalHelper.SetRawTerminalReturns(nil, errors.New("woops"))
})
It("keeps calm and carries on", func() {
Expect(fakeSecureSession.ShellCallCount()).To(Equal(1))
})
It("does not restore the terminal", func() {
Expect(fakeSecureSession.ShellCallCount()).To(Equal(1))
Expect(fakeTerminalHelper.SetRawTerminalCallCount()).To(Equal(1))
Expect(fakeTerminalHelper.RestoreTerminalCallCount()).To(Equal(0))
})
})
})
Context("when a command is specified", func() {
BeforeEach(func() {
opts.Command = []string{"echo", "-n", "hello"}
})
Context("when a terminal is requested", func() {
BeforeEach(func() {
opts.TerminalRequest = options.RequestTTYYes
})
It("requests a pty", func() {
Expect(fakeSecureSession.RequestPtyCallCount()).To(Equal(1))
})
})
Context("when a terminal is not explicitly requested", func() {
It("does not request a pty", func() {
Expect(fakeSecureSession.RequestPtyCallCount()).To(Equal(0))
})
})
})
})
Context("when stdin is not a terminal", func() {
BeforeEach(func() {
_, stdout, stderr := terminalHelper.StdStreams()
stdin := &fake_io.FakeReadCloser{}
stdin.ReadStub = func(p []byte) (int, error) {
return 0, io.EOF
}
fakeTerminalHelper.IsTerminalStub = terminalHelper.IsTerminal
fakeTerminalHelper.GetFdInfoStub = terminalHelper.GetFdInfo
fakeTerminalHelper.GetWinsizeStub = terminalHelper.GetWinsize
fakeTerminalHelper.StdStreamsReturns(stdin, stdout, stderr)
terminalHelper = fakeTerminalHelper
})
Context("when a terminal is not requested", func() {
It("does not request a pty", func() {
Expect(fakeSecureSession.RequestPtyCallCount()).To(Equal(0))
})
})
Context("when a terminal is requested", func() {
BeforeEach(func() {
opts.TerminalRequest = options.RequestTTYYes
})
It("does not request a pty", func() {
Expect(fakeSecureSession.RequestPtyCallCount()).To(Equal(0))
})
})
})
Context("when a terminal is forced", func() {
BeforeEach(func() {
opts.TerminalRequest = options.RequestTTYForce
})
It("requests a pty", func() {
Expect(fakeSecureSession.RequestPtyCallCount()).To(Equal(1))
})
})
Context("when a terminal is disabled", func() {
BeforeEach(func() {
opts.TerminalRequest = options.RequestTTYNo
})
It("does not request a pty", func() {
Expect(fakeSecureSession.RequestPtyCallCount()).To(Equal(0))
})
})
Context("when a command is not specified", func() {
It("requests an interactive shell", func() {
Expect(fakeSecureSession.ShellCallCount()).To(Equal(1))
})
Context("when the shell request returns an error", func() {
BeforeEach(func() {
fakeSecureSession.ShellReturns(errors.New("oh bother"))
})
It("returns the error", func() {
Expect(sessionError).To(MatchError("oh bother"))
})
})
})
Context("when a command is specified", func() {
BeforeEach(func() {
opts.Command = []string{"echo", "-n", "hello"}
})
It("starts the command", func() {
Expect(fakeSecureSession.StartCallCount()).To(Equal(1))
Expect(fakeSecureSession.StartArgsForCall(0)).To(Equal("echo -n hello"))
})
Context("when the command fails to start", func() {
BeforeEach(func() {
fakeSecureSession.StartReturns(errors.New("oh well"))
})
It("returns the error", func() {
Expect(sessionError).To(MatchError("oh well"))
})
})
})
Context("when the shell or command has started", func() {
var (
stdin *fake_io.FakeReadCloser
stdout, stderr *fake_io.FakeWriter
stdinPipe *fake_io.FakeWriteCloser
stdoutPipe, stderrPipe *fake_io.FakeReader
)
BeforeEach(func() {
stdin = &fake_io.FakeReadCloser{}
stdin.ReadStub = func(p []byte) (int, error) {
p[0] = 0
return 1, io.EOF
}
stdinPipe = &fake_io.FakeWriteCloser{}
stdinPipe.WriteStub = func(p []byte) (int, error) {
defer GinkgoRecover()
Expect(p[0]).To(Equal(byte(0)))
return 1, nil
}
stdoutPipe = &fake_io.FakeReader{}
stdoutPipe.ReadStub = func(p []byte) (int, error) {
p[0] = 1
return 1, io.EOF
}
stdout = &fake_io.FakeWriter{}
stdout.WriteStub = func(p []byte) (int, error) {
defer GinkgoRecover()
Expect(p[0]).To(Equal(byte(1)))
return 1, nil
}
stderrPipe = &fake_io.FakeReader{}
stderrPipe.ReadStub = func(p []byte) (int, error) {
p[0] = 2
return 1, io.EOF
}
stderr = &fake_io.FakeWriter{}
stderr.WriteStub = func(p []byte) (int, error) {
defer GinkgoRecover()
Expect(p[0]).To(Equal(byte(2)))
return 1, nil
}
fakeTerminalHelper.StdStreamsReturns(stdin, stdout, stderr)
terminalHelper = fakeTerminalHelper
fakeSecureSession.StdinPipeReturns(stdinPipe, nil)
fakeSecureSession.StdoutPipeReturns(stdoutPipe, nil)
fakeSecureSession.StderrPipeReturns(stderrPipe, nil)
fakeSecureSession.WaitReturns(errors.New("error result"))
})
It("copies data from the stdin stream to the session stdin pipe", func() {
Eventually(stdin.ReadCallCount).Should(Equal(1))
Eventually(stdinPipe.WriteCallCount).Should(Equal(1))
})
It("copies data from the session stdout pipe to the stdout stream", func() {
Eventually(stdoutPipe.ReadCallCount).Should(Equal(1))
Eventually(stdout.WriteCallCount).Should(Equal(1))
})
It("copies data from the session stderr pipe to the stderr stream", func() {
Eventually(stderrPipe.ReadCallCount).Should(Equal(1))
Eventually(stderr.WriteCallCount).Should(Equal(1))
})
It("waits for the session to end", func() {
Expect(fakeSecureSession.WaitCallCount()).To(Equal(1))
})
It("returns the result from wait", func() {
Expect(sessionError).To(MatchError("error result"))
})
Context("when the session terminates before stream copies complete", func() {
var sessionErrorCh chan error
BeforeEach(func() {
sessionErrorCh = make(chan error, 1)
interactiveSessionInvoker = func(secureShell sshCmd.SecureShell) {
go func() { sessionErrorCh <- secureShell.InteractiveSession() }()
}
stdoutPipe.ReadStub = func(p []byte) (int, error) {
defer GinkgoRecover()
Eventually(fakeSecureSession.WaitCallCount).Should(Equal(1))
Consistently(sessionErrorCh).ShouldNot(Receive())
p[0] = 1
return 1, io.EOF
}
stderrPipe.ReadStub = func(p []byte) (int, error) {
defer GinkgoRecover()
Eventually(fakeSecureSession.WaitCallCount).Should(Equal(1))
Consistently(sessionErrorCh).ShouldNot(Receive())
p[0] = 2
return 1, io.EOF
}
})
It("waits for the copies to complete", func() {
Eventually(sessionErrorCh).Should(Receive())
Expect(stdoutPipe.ReadCallCount()).To(Equal(1))
Expect(stderrPipe.ReadCallCount()).To(Equal(1))
})
})
Context("when stdin is closed", func() {
BeforeEach(func() {
stdin.ReadStub = func(p []byte) (int, error) {
defer GinkgoRecover()
Consistently(stdinPipe.CloseCallCount).Should(Equal(0))
p[0] = 0
return 1, io.EOF
}
})
It("closes the stdinPipe", func() {
Eventually(stdinPipe.CloseCallCount).Should(Equal(1))
})
})
})
Context("when stdout is a terminal and a window size change occurs", func() {
var pseudoterminal, terminal *os.File
BeforeEach(func() {
stdin, _, stderr := terminalHelper.StdStreams()
var err error
pseudoterminal, terminal, err = pty.Open()
Expect(err).NotTo(HaveOccurred())
fakeTerminalHelper.IsTerminalStub = terminalHelper.IsTerminal
fakeTerminalHelper.GetFdInfoStub = terminalHelper.GetFdInfo
fakeTerminalHelper.GetWinsizeStub = terminalHelper.GetWinsize
fakeTerminalHelper.StdStreamsReturns(stdin, terminal, stderr)
terminalHelper = fakeTerminalHelper
winsize := &term.Winsize{Height: 100, Width: 100}
err = term.SetWinsize(terminal.Fd(), winsize)
Expect(err).NotTo(HaveOccurred())
fakeSecureSession.WaitStub = func() error {
fakeSecureSession.SendRequestCallCount()
Expect(fakeSecureSession.SendRequestCallCount()).To(Equal(0))
// No dimension change
for i := 0; i < 3; i++ {
winsize := &term.Winsize{Height: 100, Width: 100}
err = term.SetWinsize(terminal.Fd(), winsize)
Expect(err).NotTo(HaveOccurred())
}
winsize := &term.Winsize{Height: 100, Width: 200}
err = term.SetWinsize(terminal.Fd(), winsize)
Expect(err).NotTo(HaveOccurred())
err = syscall.Kill(syscall.Getpid(), syscall.SIGWINCH)
Expect(err).NotTo(HaveOccurred())
Eventually(fakeSecureSession.SendRequestCallCount).Should(Equal(1))
return nil
}
})
AfterEach(func() {
pseudoterminal.Close()
terminal.Close()
})
It("sends window change events when the window dimensions change", func() {
Expect(fakeSecureSession.SendRequestCallCount()).To(Equal(1))
requestType, wantReply, message := fakeSecureSession.SendRequestArgsForCall(0)
Expect(requestType).To(Equal("window-change"))
Expect(wantReply).To(BeFalse())
type resizeMessage struct {
Width uint32
Height uint32
PixelWidth uint32
PixelHeight uint32
}
var resizeMsg resizeMessage
err := ssh.Unmarshal(message, &resizeMsg)
Expect(err).NotTo(HaveOccurred())
Expect(resizeMsg).To(Equal(resizeMessage{Height: 100, Width: 200}))
})
})
Describe("keep alive messages", func() {
var times []time.Time
var timesCh chan []time.Time
var done chan struct{}
BeforeEach(func() {
keepAliveDuration = 100 * time.Millisecond
times = []time.Time{}
timesCh = make(chan []time.Time, 1)
done = make(chan struct{}, 1)
fakeConnection.SendRequestStub = func(reqName string, wantReply bool, message []byte) (bool, []byte, error) {
Expect(reqName).To(Equal("[email protected]"))
Expect(wantReply).To(BeTrue())
Expect(message).To(BeNil())
times = append(times, time.Now())
if len(times) == 3 {
timesCh <- times
close(done)
}
return true, nil, nil
}
fakeSecureSession.WaitStub = func() error {
Eventually(done).Should(BeClosed())
return nil
}
})
It("sends keep alive messages at the expected interval", func() {
times := <-timesCh
// Expected interval time = 100 msec
Expect(times[1]).To(BeTemporally(">=", times[0]))
Expect(times[1]).To(BeTemporally("<=", times[0].Add(500*time.Millisecond)))
Expect(times[2]).To(BeTemporally(">=", times[1]))
Expect(times[2]).To(BeTemporally("<=", times[1].Add(500*time.Millisecond)))
})
})
})
Describe("LocalPortForward", func() {
var (
opts *options.SSHOptions
localForwardError error
echoAddress string
echoListener *fake_net.FakeListener
echoHandler *fake_server.FakeConnectionHandler
echoServer *server.Server
localAddress string
realLocalListener net.Listener
fakeLocalListener *fake_net.FakeListener
)
BeforeEach(func() {
logger := lagertest.NewTestLogger("test")
var err error
realLocalListener, err = net.Listen("tcp", "127.0.0.1:0")
Expect(err).NotTo(HaveOccurred())
localAddress = realLocalListener.Addr().String()
fakeListenerFactory.ListenReturns(realLocalListener, nil)
echoHandler = &fake_server.FakeConnectionHandler{}
echoHandler.HandleConnectionStub = func(conn net.Conn) {
io.Copy(conn, conn)
conn.Close()
}
realListener, err := net.Listen("tcp", "127.0.0.1:0")
Expect(err).NotTo(HaveOccurred())
echoAddress = realListener.Addr().String()
echoListener = &fake_net.FakeListener{}
echoListener.AcceptStub = realListener.Accept
echoListener.CloseStub = realListener.Close
echoListener.AddrStub = realListener.Addr
fakeLocalListener = &fake_net.FakeListener{}
fakeLocalListener.AcceptReturns(nil, errors.New("Not Accepting Connections"))
echoServer = server.NewServer(logger.Session("echo"), "", echoHandler)
echoServer.SetListener(echoListener)
go echoServer.Serve()
opts = &options.SSHOptions{
AppName: "app-1",
ForwardSpecs: []options.ForwardSpec{{
ListenAddress: localAddress,
ConnectAddress: echoAddress,
}},
}
currentApp.State = "STARTED"
sshEndpointFingerprint = ""
sshEndpoint = ""
token = ""
fakeSecureClient.DialStub = net.Dial
})
JustBeforeEach(func() {
connectErr := secureShell.Connect(opts)
Expect(connectErr).NotTo(HaveOccurred())
localForwardError = secureShell.LocalPortForward()
})
AfterEach(func() {
err := secureShell.Close()
Expect(err).NotTo(HaveOccurred())
echoServer.Shutdown()
realLocalListener.Close()
})
validateConnectivity := func(addr string) {
conn, err := net.Dial("tcp", addr)
Expect(err).NotTo(HaveOccurred())
msg := fmt.Sprintf("Hello from %s\n", addr)
n, err := conn.Write([]byte(msg))
Expect(err).NotTo(HaveOccurred())
Expect(n).To(Equal(len(msg)))
response := make([]byte, len(msg))
n, err = conn.Read(response)
Expect(err).NotTo(HaveOccurred())
Expect(n).To(Equal(len(msg)))
err = conn.Close()
Expect(err).NotTo(HaveOccurred())
Expect(response).To(Equal([]byte(msg)))
}
It("dials the connect address when a local connection is made", func() {
Expect(localForwardError).NotTo(HaveOccurred())
conn, err := net.Dial("tcp", localAddress)
Expect(err).NotTo(HaveOccurred())
Eventually(echoListener.AcceptCallCount).Should(BeNumerically(">=", 1))
Eventually(fakeSecureClient.DialCallCount).Should(Equal(1))
network, addr := fakeSecureClient.DialArgsForCall(0)
Expect(network).To(Equal("tcp"))
Expect(addr).To(Equal(echoAddress))
Expect(conn.Close()).NotTo(HaveOccurred())
})
It("copies data between the local and remote connections", func() {
validateConnectivity(localAddress)
})
Context("when a local connection is already open", func() {
var (
conn net.Conn
err error
)
JustBeforeEach(func() {
conn, err = net.Dial("tcp", localAddress)
Expect(err).NotTo(HaveOccurred())
})
AfterEach(func() {
err = conn.Close()
Expect(err).NotTo(HaveOccurred())
})
It("allows for new incoming connections as well", func() {
validateConnectivity(localAddress)
})
})
Context("when there are multiple port forward specs", func() {
var realLocalListener2 net.Listener
var localAddress2 string
BeforeEach(func() {
var err error
realLocalListener2, err = net.Listen("tcp", "127.0.0.1:0")
Expect(err).NotTo(HaveOccurred())
localAddress2 = realLocalListener2.Addr().String()