cloudflare/cloudflared
Publicmirrored from https://github.com/cloudflare/cloudflaredAvailable
datagramsession/session_test.go
177lines · modecode
| 1 | package datagramsession |
| 2 | |
| 3 | import ( |
| 4 | "bytes" |
| 5 | "context" |
| 6 | "fmt" |
| 7 | "io" |
| 8 | "net" |
| 9 | "sync" |
| 10 | "testing" |
| 11 | "time" |
| 12 | |
| 13 | "github.com/google/uuid" |
| 14 | "github.com/stretchr/testify/require" |
| 15 | "golang.org/x/sync/errgroup" |
| 16 | ) |
| 17 | |
| 18 | // TestCloseSession makes sure a session will stop after context is done |
| 19 | func TestSessionCtxDone(t *testing.T) { |
| 20 | testSessionReturns(t, closeByContext, time.Minute*2) |
| 21 | } |
| 22 | |
| 23 | // TestCloseSession makes sure a session will stop after close method is called |
| 24 | func TestCloseSession(t *testing.T) { |
| 25 | testSessionReturns(t, closeByCallingClose, time.Minute*2) |
| 26 | } |
| 27 | |
| 28 | // TestCloseIdle makess sure a session will stop after there is no read/write for a period defined by closeAfterIdle |
| 29 | func TestCloseIdle(t *testing.T) { |
| 30 | testSessionReturns(t, closeByTimeout, time.Millisecond*100) |
| 31 | } |
| 32 | |
| 33 | func testSessionReturns(t *testing.T, closeBy closeMethod, closeAfterIdle time.Duration) { |
| 34 | sessionID := uuid.New() |
| 35 | cfdConn, originConn := net.Pipe() |
| 36 | payload := testPayload(sessionID) |
| 37 | transport := &mockQUICTransport{ |
| 38 | reqChan: newDatagramChannel(1), |
| 39 | respChan: newDatagramChannel(1), |
| 40 | } |
| 41 | session := newSession(sessionID, transport, cfdConn) |
| 42 | |
| 43 | ctx, cancel := context.WithCancel(context.Background()) |
| 44 | sessionDone := make(chan struct{}) |
| 45 | go func() { |
| 46 | session.Serve(ctx, closeAfterIdle) |
| 47 | close(sessionDone) |
| 48 | }() |
| 49 | |
| 50 | go func() { |
| 51 | n, err := session.transportToDst(payload) |
| 52 | require.NoError(t, err) |
| 53 | require.Equal(t, len(payload), n) |
| 54 | }() |
| 55 | |
| 56 | readBuffer := make([]byte, len(payload)+1) |
| 57 | n, err := originConn.Read(readBuffer) |
| 58 | require.NoError(t, err) |
| 59 | require.Equal(t, len(payload), n) |
| 60 | |
| 61 | lastRead := time.Now() |
| 62 | |
| 63 | switch closeBy { |
| 64 | case closeByContext: |
| 65 | cancel() |
| 66 | case closeByCallingClose: |
| 67 | session.close() |
| 68 | } |
| 69 | |
| 70 | <-sessionDone |
| 71 | if closeBy == closeByTimeout { |
| 72 | require.True(t, time.Now().After(lastRead.Add(closeAfterIdle))) |
| 73 | } |
| 74 | // call cancelled again otherwise the linter will warn about possible context leak |
| 75 | cancel() |
| 76 | } |
| 77 | |
| 78 | type closeMethod int |
| 79 | |
| 80 | const ( |
| 81 | closeByContext closeMethod = iota |
| 82 | closeByCallingClose |
| 83 | closeByTimeout |
| 84 | ) |
| 85 | |
| 86 | func TestWriteToDstSessionPreventClosed(t *testing.T) { |
| 87 | testActiveSessionNotClosed(t, false, true) |
| 88 | } |
| 89 | |
| 90 | func TestReadFromDstSessionPreventClosed(t *testing.T) { |
| 91 | testActiveSessionNotClosed(t, true, false) |
| 92 | } |
| 93 | |
| 94 | func testActiveSessionNotClosed(t *testing.T, readFromDst bool, writeToDst bool) { |
| 95 | const closeAfterIdle = time.Millisecond * 100 |
| 96 | const activeTime = time.Millisecond * 500 |
| 97 | |
| 98 | sessionID := uuid.New() |
| 99 | cfdConn, originConn := net.Pipe() |
| 100 | payload := testPayload(sessionID) |
| 101 | transport := &mockQUICTransport{ |
| 102 | reqChan: newDatagramChannel(100), |
| 103 | respChan: newDatagramChannel(100), |
| 104 | } |
| 105 | session := newSession(sessionID, transport, cfdConn) |
| 106 | |
| 107 | startTime := time.Now() |
| 108 | activeUntil := startTime.Add(activeTime) |
| 109 | ctx, cancel := context.WithCancel(context.Background()) |
| 110 | errGroup, ctx := errgroup.WithContext(ctx) |
| 111 | errGroup.Go(func() error { |
| 112 | session.Serve(ctx, closeAfterIdle) |
| 113 | if time.Now().Before(startTime.Add(activeTime)) { |
| 114 | return fmt.Errorf("session closed while it's still active") |
| 115 | } |
| 116 | return nil |
| 117 | }) |
| 118 | |
| 119 | if readFromDst { |
| 120 | errGroup.Go(func() error { |
| 121 | for { |
| 122 | if time.Now().After(activeUntil) { |
| 123 | return nil |
| 124 | } |
| 125 | if _, err := originConn.Write(payload); err != nil { |
| 126 | return err |
| 127 | } |
| 128 | time.Sleep(closeAfterIdle / 2) |
| 129 | } |
| 130 | }) |
| 131 | } |
| 132 | if writeToDst { |
| 133 | errGroup.Go(func() error { |
| 134 | readBuffer := make([]byte, len(payload)) |
| 135 | for { |
| 136 | n, err := originConn.Read(readBuffer) |
| 137 | if err != nil { |
| 138 | if err == io.EOF || err == io.ErrClosedPipe { |
| 139 | return nil |
| 140 | } |
| 141 | return err |
| 142 | } |
| 143 | if !bytes.Equal(payload, readBuffer[:n]) { |
| 144 | return fmt.Errorf("payload %v is not equal to %v", readBuffer[:n], payload) |
| 145 | } |
| 146 | } |
| 147 | }) |
| 148 | errGroup.Go(func() error { |
| 149 | for { |
| 150 | if time.Now().After(activeUntil) { |
| 151 | return nil |
| 152 | } |
| 153 | if _, err := session.transportToDst(payload); err != nil { |
| 154 | return err |
| 155 | } |
| 156 | time.Sleep(closeAfterIdle / 2) |
| 157 | } |
| 158 | }) |
| 159 | } |
| 160 | |
| 161 | require.NoError(t, errGroup.Wait()) |
| 162 | cancel() |
| 163 | } |
| 164 | |
| 165 | func TestMarkActiveNotBlocking(t *testing.T) { |
| 166 | const concurrentCalls = 50 |
| 167 | session := newSession(uuid.New(), nil, nil) |
| 168 | var wg sync.WaitGroup |
| 169 | wg.Add(concurrentCalls) |
| 170 | for i := 0; i < concurrentCalls; i++ { |
| 171 | go func() { |
| 172 | session.markActive() |
| 173 | wg.Done() |
| 174 | }() |
| 175 | } |
| 176 | wg.Wait() |
| 177 | } |
| 178 | |