mirror of
https://github.com/gravitational/teleport.git
synced 2026-11-01 13:39:37 +08:00
87 lines
2.4 KiB
Go
87 lines
2.4 KiB
Go
// Copyright 2022 Gravitational, Inc
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package x11
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import (
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"context"
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"net"
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"testing"
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"github.com/stretchr/testify/require"
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)
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func TestForward(t *testing.T) {
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ctx := context.Background()
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// Open a dual sided connection on a new tcp listener
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openConn := func(t *testing.T) (clientConn net.Conn, serverConn net.Conn) {
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l, err := net.Listen("tcp", ":0")
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require.NoError(t, err)
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t.Cleanup(func() { require.NoError(t, l.Close()) })
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serverErrC := make(chan error)
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serverConnC := make(chan net.Conn)
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go func() {
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serverConn, err := l.Accept()
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if err != nil {
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serverErrC <- err
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close(serverConnC)
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}
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serverConnC <- serverConn
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close(serverErrC)
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}()
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clientConn, err = net.Dial("tcp", l.Addr().String())
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require.NoError(t, err)
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t.Cleanup(func() { clientConn.Close() })
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serverConn = <-serverConnC
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require.NoError(t, <-serverErrC)
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t.Cleanup(func() { serverConn.Close() })
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return clientConn, serverConn
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}
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cConn1, sConn1 := openConn(t)
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cConn2, sConn2 := openConn(t)
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// Start forwarding between connections so that we get
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// this flow: cConn1 -> sConn1 -> cConn2 -> sConn2.
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serverConnToForward, ok := sConn1.(*net.TCPConn)
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require.True(t, ok)
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clientConnToForward, ok := cConn2.(*net.TCPConn)
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require.True(t, ok)
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forwardErrC := make(chan error, 1)
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go func() {
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forwardErrC <- Forward(ctx, serverConnToForward, clientConnToForward)
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}()
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// Write a msg to client connection 1, which should propagate to server connection 2.
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message := "msg"
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_, err := cConn1.Write([]byte(message))
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require.NoError(t, err)
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buf := make([]byte, len(message))
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_, err = sConn2.Read(buf)
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require.NoError(t, err)
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require.Equal(t, message, string(buf))
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// Fowarding should stop once the other sides of the forwarded connections are closed.
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require.NoError(t, cConn1.Close())
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require.NoError(t, sConn2.Close())
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require.NoError(t, <-forwardErrC)
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}
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