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// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// +build darwin dragonfly freebsd linux netbsd openbsd
package test
import (
"bytes"
"io"
"io/ioutil"
"math/rand"
"net"
"testing"
"time"
)
type closeWriter interface {
CloseWrite() error
}
func testPortForward(t *testing.T, n, listenAddr string) {
server := newServer(t)
defer server.Shutdown()
conn := server.Dial(clientConfig())
defer conn.Close()
sshListener, err := conn.Listen(n, listenAddr)
if err != nil {
t.Fatal(err)
}
go func() {
sshConn, err := sshListener.Accept()
if err != nil {
t.Fatalf("listen.Accept failed: %v", err)
}
_, err = io.Copy(sshConn, sshConn)
if err != nil && err != io.EOF {
t.Fatalf("ssh client copy: %v", err)
}
sshConn.Close()
}()
forwardedAddr := sshListener.Addr().String()
netConn, err := net.Dial(n, forwardedAddr)
if err != nil {
t.Fatalf("net dial failed: %v", err)
}
readChan := make(chan []byte)
go func() {
data, _ := ioutil.ReadAll(netConn)
readChan <- data
}()
// Invent some data.
data := make([]byte, 100*1000)
for i := range data {
data[i] = byte(i % 255)
}
var sent []byte
for len(sent) < 1000*1000 {
// Send random sized chunks
m := rand.Intn(len(data))
n, err := netConn.Write(data[:m])
if err != nil {
break
}
sent = append(sent, data[:n]...)
}
if err := netConn.(closeWriter).CloseWrite(); err != nil {
t.Errorf("netConn.CloseWrite: %v", err)
}
read := <-readChan
if len(sent) != len(read) {
t.Fatalf("got %d bytes, want %d", len(read), len(sent))
}
if bytes.Compare(sent, read) != 0 {
t.Fatalf("read back data does not match")
}
if err := sshListener.Close(); err != nil {
t.Fatalf("sshListener.Close: %v", err)
}
// Check that the forward disappeared.
netConn, err = net.Dial(n, forwardedAddr)
if err == nil {
netConn.Close()
t.Errorf("still listening to %s after closing", forwardedAddr)
}
}
func TestPortForwardTCP(t *testing.T) {
testPortForward(t, "tcp", "localhost:0")
}
func TestPortForwardUnix(t *testing.T) {
addr, cleanup := newTempSocket(t)
defer cleanup()
testPortForward(t, "unix", addr)
}
func testAcceptClose(t *testing.T, n, listenAddr string) {
server := newServer(t)
defer server.Shutdown()
conn := server.Dial(clientConfig())
sshListener, err := conn.Listen(n, listenAddr)
if err != nil {
t.Fatal(err)
}
quit := make(chan error, 1)
go func() {
for {
c, err := sshListener.Accept()
if err != nil {
quit <- err
break
}
c.Close()
}
}()
sshListener.Close()
select {
case <-time.After(1 * time.Second):
t.Errorf("timeout: listener did not close.")
case err := <-quit:
t.Logf("quit as expected (error %v)", err)
}
}
func TestAcceptCloseTCP(t *testing.T) {
testAcceptClose(t, "tcp", "localhost:0")
}
func TestAcceptCloseUnix(t *testing.T) {
addr, cleanup := newTempSocket(t)
defer cleanup()
testAcceptClose(t, "unix", addr)
}
// Check that listeners exit if the underlying client transport dies.
func testPortForwardConnectionClose(t *testing.T, n, listenAddr string) {
server := newServer(t)
defer server.Shutdown()
conn := server.Dial(clientConfig())
sshListener, err := conn.Listen(n, listenAddr)
if err != nil {
t.Fatal(err)
}
quit := make(chan error, 1)
go func() {
for {
c, err := sshListener.Accept()
if err != nil {
quit <- err
break
}
c.Close()
}
}()
// It would be even nicer if we closed the server side, but it
// is more involved as the fd for that side is dup()ed.
server.clientConn.Close()
select {
case <-time.After(1 * time.Second):
t.Errorf("timeout: listener did not close.")
case err := <-quit:
t.Logf("quit as expected (error %v)", err)
}
}
func TestPortForwardConnectionCloseTCP(t *testing.T) {
testPortForwardConnectionClose(t, "tcp", "localhost:0")
}
func TestPortForwardConnectionCloseUnix(t *testing.T) {
addr, cleanup := newTempSocket(t)
defer cleanup()
testPortForwardConnectionClose(t, "unix", addr)
}
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