1052 lines
34 KiB
Go
1052 lines
34 KiB
Go
package mtprotoedge
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import (
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"bytes"
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"context"
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"crypto/rand"
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"errors"
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"io"
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"sync"
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"sync/atomic"
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"testing"
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"time"
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"github.com/gotd/td/bin"
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"github.com/gotd/td/crypto"
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"github.com/gotd/td/mt"
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"github.com/gotd/td/proto"
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"github.com/gotd/td/tg"
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"github.com/gotd/td/transport"
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)
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type failAfterTransport struct {
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failAt atomic.Int32
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sends atomic.Int32
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stored atomic.Int32
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closes atomic.Int32
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mu sync.Mutex
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last []byte
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}
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type blockingOutboundTransport struct {
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started chan struct{}
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release chan struct{}
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once sync.Once
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sends atomic.Int32
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}
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type blockingEncodeProbe struct {
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started chan struct{}
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release <-chan struct{}
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active atomic.Int32
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max atomic.Int32
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}
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func (e *blockingEncodeProbe) Encode(b *bin.Buffer) error {
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active := e.active.Add(1)
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for {
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max := e.max.Load()
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if active <= max || e.max.CompareAndSwap(max, active) {
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break
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}
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}
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e.started <- struct{}{}
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<-e.release
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e.active.Add(-1)
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b.PutID(tg.UpdatesTooLongTypeID)
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return nil
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}
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func newBlockingOutboundTransport() *blockingOutboundTransport {
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return &blockingOutboundTransport{started: make(chan struct{}), release: make(chan struct{})}
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}
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func TestOutboundEncodingHasProcessWideConcurrencyBudget(t *testing.T) {
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const extra = 8
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total := defaultOutboundEncodeConcurrency + extra
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release := make(chan struct{})
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probe := &blockingEncodeProbe{
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started: make(chan struct{}, total),
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release: release,
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}
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errs := make(chan error, total)
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for range total {
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go func() {
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_, err := encodeOutboundMessage(probe)
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errs <- err
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}()
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}
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for range defaultOutboundEncodeConcurrency {
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select {
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case <-probe.started:
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case <-time.After(time.Second):
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t.Fatal("encode workers did not fill concurrency budget")
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}
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}
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select {
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case <-probe.started:
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t.Fatalf("more than %d outbound encodes ran concurrently", defaultOutboundEncodeConcurrency)
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case <-time.After(50 * time.Millisecond):
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}
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close(release)
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for range total {
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if err := <-errs; err != nil {
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t.Fatalf("encode: %v", err)
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}
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}
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if got := probe.max.Load(); got != defaultOutboundEncodeConcurrency {
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t.Fatalf("peak concurrent encodes = %d, want %d", got, defaultOutboundEncodeConcurrency)
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}
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}
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func TestConnectionCloseDoesNotWaitForRunningEncoder(t *testing.T) {
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release := make(chan struct{})
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probe := &blockingEncodeProbe{started: make(chan struct{}, 1), release: release}
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c := &Conn{metrics: NopMetrics{}}
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c.startOutbound()
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sendDone := make(chan error, 1)
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go func() {
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sendDone <- c.Send(context.Background(), proto.MessageFromServer, probe)
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}()
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select {
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case <-probe.started:
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case <-time.After(time.Second):
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t.Fatal("encoder did not start")
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}
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closeDone := make(chan struct{})
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go func() {
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c.Close()
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close(closeDone)
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}()
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select {
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case <-closeDone:
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case <-time.After(time.Second):
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t.Fatal("Conn.Close waited for external Encoder")
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}
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close(release)
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select {
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case err := <-sendDone:
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if !errors.Is(err, ErrConnClosed) {
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t.Fatalf("send after concurrent close = %v, want ErrConnClosed", err)
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}
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case <-time.After(time.Second):
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t.Fatal("send did not return after encoder release")
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}
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}
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func TestOutboundControlVectorsUseGlobalByteBudget(t *testing.T) {
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budget := newOutboundTrackedBudget(16)
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c := &Conn{outboundControlTrackedBudget: budget}
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op, err := c.newOutboundVectorOp(outboundAck, []int64{1, 2})
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if err != nil {
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t.Fatalf("reserve first vector: %v", err)
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}
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if got := budget.snapshot(); got != 16 {
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t.Fatalf("tracked bytes after reserve = %d, want 16", got)
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}
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if _, err := c.newOutboundVectorOp(outboundResend, []int64{3}); !errors.Is(err, ErrOutboundTrackedBudget) {
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t.Fatalf("reserve over budget error = %v, want %v", err, ErrOutboundTrackedBudget)
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}
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op.releaseReservation(budget)
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if got := budget.snapshot(); got != 0 {
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t.Fatalf("tracked bytes after release = %d, want 0", got)
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}
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}
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func TestEncodedControlFramesUseIndependentBudgetForQueuedAndPendingLifetime(t *testing.T) {
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bodyBudget := newOutboundTrackedBudget(4)
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controlBudget := newOutboundTrackedBudget(256)
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tr := &failAfterTransport{}
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c := newOutboundTestConn(t, tr, bodyBudget)
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c.outboundControlTrackedBudget = controlBudget
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ctx, cancel := context.WithTimeout(context.Background(), time.Second)
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defer cancel()
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// One content frame fills the ordinary body budget and remains pending.
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if err := c.Send(ctx, proto.MessageFromServer, &tg.UpdatesTooLong{}); err != nil {
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t.Fatalf("fill body budget: %v", err)
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}
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first, err := crypto.NewClientCipher(rand.Reader).DecryptFromBuffer(c.key, &bin.Buffer{Buf: tr.lastFrame()})
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if err != nil {
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t.Fatalf("decrypt ordinary frame: %v", err)
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}
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if got := bodyBudget.snapshot(); got != 4 {
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t.Fatalf("body budget = %d, want saturated 4", got)
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}
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created := &mt.NewSessionCreated{FirstMsgID: 1, UniqueID: 2, ServerSalt: 3}
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encodedCreated, err := encodeOutboundMessageWithoutSlot(created)
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if err != nil {
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t.Fatalf("encode new_session_created: %v", err)
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}
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if err := c.SendAsync(ctx, proto.MessageFromServer, created); err != nil {
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t.Fatalf("new_session_created under saturated body budget: %v", err)
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}
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deadline := time.Now().Add(time.Second)
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for tr.stored.Load() < 2 && time.Now().Before(deadline) {
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time.Sleep(time.Millisecond)
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}
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if got := tr.stored.Load(); got != 2 {
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t.Fatalf("completed physical sends = %d, want 2", got)
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}
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second, err := crypto.NewClientCipher(rand.Reader).DecryptFromBuffer(c.key, &bin.Buffer{Buf: tr.lastFrame()})
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if err != nil {
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t.Fatalf("decrypt control frame: %v", err)
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}
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if got := bodyBudget.snapshot(); got != 4 {
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t.Fatalf("body budget after control send = %d, want unchanged 4", got)
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}
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if got := controlBudget.snapshot(); got != int64(len(encodedCreated.body)) {
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t.Fatalf("control pending budget = %d, want new_session_created body %d", got, len(encodedCreated.body))
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}
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select {
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case <-c.outboundDone:
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t.Fatal("ordinary body pressure closed a healthy connection")
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default:
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}
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// Pong is non-pending, but must also remain admissible and return its control bytes after write.
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if err := c.SendAsync(ctx, proto.MessageServerResponse, &mt.Pong{MsgID: 4, PingID: 5}); err != nil {
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t.Fatalf("pong under saturated body budget: %v", err)
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}
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deadline = time.Now().Add(time.Second)
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for tr.stored.Load() < 3 && time.Now().Before(deadline) {
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time.Sleep(time.Millisecond)
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}
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if got := tr.stored.Load(); got != 3 {
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t.Fatalf("completed physical sends after pong = %d, want 3", got)
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}
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if got := controlBudget.snapshot(); got != int64(len(encodedCreated.body)) {
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t.Fatalf("control budget after non-pending pong = %d, want pending %d", got, len(encodedCreated.body))
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}
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c.AckServerMessages([]int64{first.MessageID, second.MessageID})
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deadline = time.Now().Add(time.Second)
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for (bodyBudget.snapshot() != 0 || controlBudget.snapshot() != 0) && time.Now().Before(deadline) {
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time.Sleep(time.Millisecond)
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}
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if got := bodyBudget.snapshot(); got != 0 {
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t.Fatalf("body budget after ACK = %d, want 0", got)
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}
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if got := controlBudget.snapshot(); got != 0 {
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t.Fatalf("control budget after ACK = %d, want 0", got)
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}
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}
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func TestOutboundScratchPoolBoundsConcurrentWireCopies(t *testing.T) {
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pool := newOutboundScratchPool(300 + 2*maxCompatPacketOverhead)
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first, err := pool.acquire(context.Background(), nil, 100) // Full wire+codec+obfuscation budget.
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if err != nil {
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t.Fatalf("acquire first scratch: %v", err)
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}
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ctx, cancel := context.WithTimeout(context.Background(), 20*time.Millisecond)
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defer cancel()
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if _, err := pool.acquire(ctx, nil, 100); !errors.Is(err, context.DeadlineExceeded) {
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t.Fatalf("second concurrent acquire = %v, want deadline backpressure", err)
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}
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pool.release(first)
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if got := pool.snapshot(); got != 100 {
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t.Fatalf("idle retained scratch = %d, want 100", got)
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}
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second, err := pool.acquire(context.Background(), nil, 100)
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if err != nil {
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t.Fatalf("reuse retained scratch: %v", err)
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}
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pool.release(second)
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if got := pool.snapshot(); got != 100 {
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t.Fatalf("scratch after reuse = %d, want one bounded idle buffer", got)
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}
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}
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func TestOutboundScratchPoolAccountsRetainedCodecScratch(t *testing.T) {
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pool := newOutboundScratchPool(300 + 2*maxCompatPacketOverhead)
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scratch, err := pool.acquire(context.Background(), nil, 100)
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if err != nil {
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t.Fatalf("acquire scratch: %v", err)
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}
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scratch.codec = make([]byte, 0, 80)
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pool.release(scratch)
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if got := pool.snapshot(); got != 180 {
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t.Fatalf("retained wire+codec scratch = %d, want 180", got)
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}
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reused, err := pool.acquire(context.Background(), nil, 100)
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if err != nil {
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t.Fatalf("reuse scratch: %v", err)
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}
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if cap(reused.codec) != 80 {
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t.Fatalf("reused codec scratch capacity = %d, want 80", cap(reused.codec))
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}
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pool.release(reused)
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}
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func TestOutboundScratchAdmissionUsesWriteTimeoutWithoutClosingHealthyConnection(t *testing.T) {
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wireBytes := encryptedOutboundWireLen(4)
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pool := newOutboundScratchPool(int64(wireBytes*3 + 2*maxCompatPacketOverhead))
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blocker, err := pool.acquire(context.Background(), nil, wireBytes)
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if err != nil {
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t.Fatalf("occupy shared scratch budget: %v", err)
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}
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tr := &failAfterTransport{}
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c := newOutboundTestConn(t, tr, newOutboundTrackedBudget(1<<20))
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c.outboundScratchPool = pool
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c.writeTimeout = 25 * time.Millisecond
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start := time.Now()
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err = c.Send(context.Background(), proto.MessageFromServer, &tg.UpdatesTooLong{})
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elapsed := time.Since(start)
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if !errors.Is(err, context.DeadlineExceeded) {
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t.Fatalf("scratch admission err = %v, want deadline exceeded", err)
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}
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if elapsed > 250*time.Millisecond {
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t.Fatalf("scratch admission waited %v, want writeTimeout-bounded wait", elapsed)
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}
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if got := tr.sends.Load(); got != 0 {
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t.Fatalf("writer called %d times without scratch, want 0", got)
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}
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if c.isRetired() {
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t.Fatal("scratch admission timeout terminally closed a healthy connection")
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}
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select {
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case <-c.outboundDone:
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t.Fatal("outbound actor exited after pre-write scratch timeout")
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default:
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}
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pool.release(blocker)
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c.writeTimeout = time.Second
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if err := c.Send(context.Background(), proto.MessageFromServer, &tg.UpdatesTooLong{}); err != nil {
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t.Fatalf("send after scratch capacity returned: %v", err)
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}
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if got := tr.sends.Load(); got != 1 {
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t.Fatalf("writer calls after recovery = %d, want 1", got)
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}
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}
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func (t *blockingOutboundTransport) Send(context.Context, *bin.Buffer) error {
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if t.sends.Add(1) == 1 {
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close(t.started)
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}
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<-t.release
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return io.ErrClosedPipe
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}
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func (t *blockingOutboundTransport) Recv(context.Context, *bin.Buffer) error { return io.EOF }
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func (t *blockingOutboundTransport) Close() error {
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t.once.Do(func() { close(t.release) })
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return nil
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}
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func (t *failAfterTransport) Send(_ context.Context, b *bin.Buffer) error {
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n := t.sends.Add(1)
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if failAt := t.failAt.Load(); failAt > 0 && n >= failAt {
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return io.ErrClosedPipe
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}
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t.mu.Lock()
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t.last = append(t.last[:0], b.Raw()...)
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t.mu.Unlock()
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t.stored.Add(1)
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return nil
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}
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func (t *failAfterTransport) Recv(context.Context, *bin.Buffer) error { return io.EOF }
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func (t *failAfterTransport) Close() error {
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t.closes.Add(1)
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return nil
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}
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func (t *failAfterTransport) lastFrame() []byte {
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t.mu.Lock()
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defer t.mu.Unlock()
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return append([]byte(nil), t.last...)
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}
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|
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func newOutboundFailureTestConn(t *testing.T, tr transport.Conn) *Conn {
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return newOutboundTestConn(t, tr, nil)
|
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}
|
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|
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func newOutboundTestConn(t *testing.T, tr transport.Conn, budget *outboundTrackedBudget) *Conn {
|
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t.Helper()
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var key crypto.Key
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if _, err := rand.Read(key[:]); err != nil {
|
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t.Fatalf("rand key: %v", err)
|
|
}
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c := &Conn{
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transport: tr,
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writer: tr,
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cipher: crypto.NewServerCipher(rand.Reader),
|
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msgID: proto.NewMessageIDGen(time.Now),
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writeTimeout: time.Second,
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metrics: NopMetrics{},
|
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key: key.WithID(),
|
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salt: 123,
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sessionID: 456,
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outboundTrackedBudget: budget,
|
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}
|
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c.startOutbound()
|
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t.Cleanup(c.Close)
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return c
|
|
}
|
|
|
|
func TestOutboundQueueBackingUsesSmallConfigurableBounds(t *testing.T) {
|
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t.Run("defaults", func(t *testing.T) {
|
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c := &Conn{metrics: NopMetrics{}}
|
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c.startOutbound()
|
|
defer c.Close()
|
|
if got := cap(c.outbound); got != defaultOutboundQueueSize {
|
|
t.Fatalf("normal queue cap = %d, want %d", got, defaultOutboundQueueSize)
|
|
}
|
|
if got := cap(c.outboundControl); got != defaultOutboundControlQueueSize {
|
|
t.Fatalf("control queue cap = %d, want %d", got, defaultOutboundControlQueueSize)
|
|
}
|
|
})
|
|
|
|
t.Run("configured", func(t *testing.T) {
|
|
c := &Conn{
|
|
metrics: NopMetrics{},
|
|
outboundQueueSize: 7,
|
|
outboundControlQueueSize: 3,
|
|
}
|
|
c.startOutbound()
|
|
defer c.Close()
|
|
if got := cap(c.outbound); got != 7 {
|
|
t.Fatalf("normal queue cap = %d, want 7", got)
|
|
}
|
|
if got := cap(c.outboundControl); got != 3 {
|
|
t.Fatalf("control queue cap = %d, want 3", got)
|
|
}
|
|
})
|
|
}
|
|
|
|
func TestOutboundOptionsDefaults(t *testing.T) {
|
|
opts := Options{}
|
|
opts.setDefaults()
|
|
if opts.OutboundQueueSize != 128 || opts.OutboundControlQueueSize != 32 {
|
|
t.Fatalf("outbound queue defaults = %d/%d, want 128/32", opts.OutboundQueueSize, opts.OutboundControlQueueSize)
|
|
}
|
|
if opts.OutboundTrackedGlobalMaxBytes != 512<<20 {
|
|
t.Fatalf("outbound tracked default = %d, want %d", opts.OutboundTrackedGlobalMaxBytes, 512<<20)
|
|
}
|
|
}
|
|
|
|
func TestServerNewConnectionsShareOutboundBudgetAndQueueLimits(t *testing.T) {
|
|
srv := New(Options{
|
|
OutboundQueueSize: 7,
|
|
OutboundControlQueueSize: 3,
|
|
OutboundTrackedGlobalMaxBytes: 20,
|
|
})
|
|
var rawKey crypto.Key
|
|
key := rawKey.WithID()
|
|
c1 := srv.newConn(nil, key, 1, 1)
|
|
c2 := srv.newConn(nil, key, 2, 1)
|
|
defer c1.Close()
|
|
defer c2.Close()
|
|
|
|
if cap(c1.outbound) != 7 || cap(c1.outboundControl) != 3 || cap(c2.outbound) != 7 || cap(c2.outboundControl) != 3 {
|
|
t.Fatalf("server queue caps = %d/%d and %d/%d, want 7/3",
|
|
cap(c1.outbound), cap(c1.outboundControl), cap(c2.outbound), cap(c2.outboundControl))
|
|
}
|
|
if c1.outboundTrackedBudget != srv.outboundTrackedBudget || c2.outboundTrackedBudget != srv.outboundTrackedBudget {
|
|
t.Fatal("server connections did not receive the shared outbound tracking budget")
|
|
}
|
|
if got := srv.outboundTrackedBudget.maxBytes; got != 20 {
|
|
t.Fatalf("server outbound tracked max = %d, want 20", got)
|
|
}
|
|
}
|
|
|
|
func TestEncryptOutboundFrameDecryptsWithGotdCipher(t *testing.T) {
|
|
var key crypto.Key
|
|
if _, err := rand.Read(key[:]); err != nil {
|
|
t.Fatalf("rand key: %v", err)
|
|
}
|
|
authKey := key.WithID()
|
|
body := mustEncodeTL(t, &mt.NewSessionCreated{
|
|
FirstMsgID: 111,
|
|
UniqueID: 222,
|
|
ServerSalt: 333,
|
|
})
|
|
c := &Conn{
|
|
cipher: crypto.NewServerCipher(rand.Reader),
|
|
key: authKey,
|
|
salt: 12345,
|
|
sessionID: 67890,
|
|
}
|
|
out, err := c.encryptOutboundFrame(&outboundFrame{
|
|
msgID: 7649066000000000001,
|
|
seqNo: 1,
|
|
typeID: mt.NewSessionCreatedTypeID,
|
|
body: body,
|
|
})
|
|
if err != nil {
|
|
t.Fatalf("encrypt: %v", err)
|
|
}
|
|
data, err := crypto.NewClientCipher(rand.Reader).DecryptFromBuffer(authKey, &bin.Buffer{Buf: append([]byte(nil), out.Raw()...)})
|
|
if err != nil {
|
|
t.Fatalf("decrypt: %v", err)
|
|
}
|
|
if data.Salt != c.salt || data.SessionID != c.sessionID {
|
|
t.Fatalf("salt/session = %d/%d, want %d/%d", data.Salt, data.SessionID, c.salt, c.sessionID)
|
|
}
|
|
if got := data.Data(); !bytes.Equal(got, body) {
|
|
t.Fatalf("body = %x, want %x", got, body)
|
|
}
|
|
}
|
|
|
|
func TestOutboundActorSerializesConcurrentSends(t *testing.T) {
|
|
const dc = 2
|
|
addr, pub, srv := startTestServer(t, Options{DC: dc})
|
|
conn, auth, cipher := dialHandshake(t, addr, dc, pub)
|
|
|
|
clientMsgID := proto.NewMessageIDGen(time.Now)
|
|
sendEncrypted(t, conn, cipher, auth, clientMsgID.New(proto.MessageFromClient), &mt.PingRequest{PingID: 1})
|
|
collectReplies(t, conn, cipher, auth.AuthKey, mt.MsgsAckTypeID)
|
|
srv.Conns().SetReceivesUpdates(auth.SessionID, true)
|
|
|
|
const sends = 64
|
|
var wg sync.WaitGroup
|
|
errs := make(chan error, sends)
|
|
for i := 0; i < sends; i++ {
|
|
wg.Add(1)
|
|
go func() {
|
|
defer wg.Done()
|
|
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
|
|
defer cancel()
|
|
errs <- srv.Conns().PushToSession(ctx, auth.SessionID, proto.MessageFromServer, &tg.UpdatesTooLong{})
|
|
}()
|
|
}
|
|
wg.Wait()
|
|
close(errs)
|
|
for err := range errs {
|
|
if err != nil {
|
|
t.Fatalf("push: %v", err)
|
|
}
|
|
}
|
|
|
|
var prevMsgID int64
|
|
var prevSeqNo int32 = -1
|
|
for i := 0; i < sends; i++ {
|
|
data, id, _ := readServerMessage(t, conn, cipher, auth.AuthKey)
|
|
if id != tg.UpdatesTooLongTypeID {
|
|
t.Fatalf("message %d type = %#x, want updatesTooLong", i, id)
|
|
}
|
|
if i > 0 && data.MessageID <= prevMsgID {
|
|
t.Fatalf("message %d msg_id = %d after %d, want strictly increasing", i, data.MessageID, prevMsgID)
|
|
}
|
|
if data.SeqNo%2 != 1 {
|
|
t.Fatalf("message %d seq_no = %d, want odd content-related seq_no", i, data.SeqNo)
|
|
}
|
|
if i > 0 && data.SeqNo <= prevSeqNo {
|
|
t.Fatalf("message %d seq_no = %d after %d, want increasing", i, data.SeqNo, prevSeqNo)
|
|
}
|
|
prevMsgID = data.MessageID
|
|
prevSeqNo = data.SeqNo
|
|
}
|
|
}
|
|
|
|
func TestOutboundWriteErrorTerminallyClosesWithoutActorDeadlock(t *testing.T) {
|
|
tr := &failAfterTransport{}
|
|
tr.failAt.Store(1)
|
|
c := newOutboundFailureTestConn(t, tr)
|
|
|
|
ctx, cancel := context.WithTimeout(context.Background(), time.Second)
|
|
defer cancel()
|
|
if err := c.Send(ctx, proto.MessageFromServer, &tg.UpdatesTooLong{}); err == nil {
|
|
t.Fatal("Send unexpectedly succeeded")
|
|
}
|
|
select {
|
|
case <-c.outboundDone:
|
|
case <-time.After(time.Second):
|
|
t.Fatal("outbound actor deadlocked while terminalizing its own write error")
|
|
}
|
|
if got := tr.closes.Load(); got != 1 {
|
|
t.Fatalf("transport closes = %d, want 1", got)
|
|
}
|
|
if err := c.Send(ctx, proto.MessageFromServer, &tg.UpdatesTooLong{}); !errors.Is(err, ErrConnClosed) {
|
|
t.Fatalf("second Send err = %v, want ErrConnClosed", err)
|
|
}
|
|
if got := tr.sends.Load(); got != 1 {
|
|
t.Fatalf("physical sends after terminal error = %d, want 1", got)
|
|
}
|
|
}
|
|
|
|
func TestOutboundResendWriteErrorTerminallyCloses(t *testing.T) {
|
|
tr := &failAfterTransport{}
|
|
c := newOutboundFailureTestConn(t, tr)
|
|
ctx, cancel := context.WithTimeout(context.Background(), time.Second)
|
|
defer cancel()
|
|
|
|
if err := c.Send(ctx, proto.MessageFromServer, &tg.UpdatesTooLong{}); err != nil {
|
|
t.Fatalf("initial Send: %v", err)
|
|
}
|
|
data, err := crypto.NewClientCipher(rand.Reader).DecryptFromBuffer(c.key, &bin.Buffer{Buf: tr.lastFrame()})
|
|
if err != nil {
|
|
t.Fatalf("decrypt initial frame: %v", err)
|
|
}
|
|
tr.failAt.Store(2)
|
|
if _, err := c.ResendMessages(ctx, []int64{data.MessageID}); err == nil {
|
|
t.Fatal("ResendMessages unexpectedly succeeded")
|
|
}
|
|
select {
|
|
case <-c.outboundDone:
|
|
case <-time.After(time.Second):
|
|
t.Fatal("outbound actor did not exit after resend write error")
|
|
}
|
|
if got := tr.closes.Load(); got != 1 {
|
|
t.Fatalf("transport closes = %d, want 1", got)
|
|
}
|
|
}
|
|
|
|
func TestOutboundTrackedBudgetSharedAcrossConnections(t *testing.T) {
|
|
budget := newOutboundTrackedBudget(12)
|
|
tr1 := &failAfterTransport{}
|
|
tr2 := &failAfterTransport{}
|
|
c1 := newOutboundTestConn(t, tr1, budget)
|
|
c2 := newOutboundTestConn(t, tr2, budget)
|
|
body := &encodedOutboundMessage{body: make([]byte, 8), typeID: tg.UpdatesTooLongTypeID}
|
|
ctx, cancel := context.WithTimeout(context.Background(), time.Second)
|
|
defer cancel()
|
|
|
|
if err := c1.SendEncoded(ctx, proto.MessageFromServer, body); err != nil {
|
|
t.Fatalf("first connection send: %v", err)
|
|
}
|
|
if got := budget.snapshot(); got != 8 {
|
|
t.Fatalf("tracked bytes after first connection = %d, want 8", got)
|
|
}
|
|
if err := c2.SendEncoded(ctx, proto.MessageFromServer, body); !errors.Is(err, ErrOutboundTrackedBudget) && !errors.Is(err, ErrConnClosed) {
|
|
t.Fatalf("second connection send err = %v, want tracked budget/closed", err)
|
|
}
|
|
select {
|
|
case <-c2.outboundDone:
|
|
case <-time.After(time.Second):
|
|
t.Fatal("budget-exhausted connection did not terminate")
|
|
}
|
|
if got := tr2.sends.Load(); got != 0 {
|
|
t.Fatalf("budget-exhausted connection wrote %d frames, want 0", got)
|
|
}
|
|
if got := budget.snapshot(); got != 8 {
|
|
t.Fatalf("tracked bytes after second rejection = %d, want first connection's 8", got)
|
|
}
|
|
|
|
c1.Close()
|
|
if got := budget.snapshot(); got != 0 {
|
|
t.Fatalf("tracked bytes after first connection close = %d, want 0", got)
|
|
}
|
|
}
|
|
|
|
func TestOutboundTrackedBudgetReleaseBroadcastsToAllWaiters(t *testing.T) {
|
|
const waiters = 8
|
|
budget := newOutboundTrackedBudget(waiters)
|
|
if !budget.reserve(waiters) {
|
|
t.Fatal("reserve initial saturated budget")
|
|
}
|
|
|
|
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
|
|
defer cancel()
|
|
results := make(chan error, waiters)
|
|
for i := 0; i < waiters; i++ {
|
|
go func() {
|
|
results <- budget.waitReserve(ctx, nil, 1)
|
|
}()
|
|
}
|
|
|
|
deadline := time.Now().Add(time.Second)
|
|
for {
|
|
budget.wakeMu.Lock()
|
|
got := budget.wake.waiters
|
|
budget.wakeMu.Unlock()
|
|
if got == waiters {
|
|
break
|
|
}
|
|
if time.Now().After(deadline) {
|
|
t.Fatalf("subscribed waiters = %d, want %d", got, waiters)
|
|
}
|
|
time.Sleep(time.Millisecond)
|
|
}
|
|
|
|
// One batch release creates capacity for every waiter. A single-token notification strands
|
|
// seven of them forever because successful reservations do not produce another wake-up.
|
|
budget.release(waiters)
|
|
for i := 0; i < waiters; i++ {
|
|
if err := <-results; err != nil {
|
|
t.Fatalf("waiter %d: %v", i, err)
|
|
}
|
|
}
|
|
if got := budget.snapshot(); got != waiters {
|
|
t.Fatalf("reserved bytes after broadcast = %d, want %d", got, waiters)
|
|
}
|
|
budget.release(waiters)
|
|
}
|
|
|
|
func TestOutboundGlobalBudgetIncludesQueuedBodies(t *testing.T) {
|
|
budget := newOutboundTrackedBudget(24)
|
|
tr := newBlockingOutboundTransport()
|
|
c := newOutboundTestConn(t, tr, budget)
|
|
body := &encodedOutboundMessage{body: make([]byte, 8), typeID: tg.UpdatesTooLongTypeID}
|
|
|
|
if err := c.SendBestEffortEncoded(context.Background(), proto.MessageFromServer, body, 0); err != nil {
|
|
t.Fatalf("enqueue writing body: %v", err)
|
|
}
|
|
select {
|
|
case <-tr.started:
|
|
case <-time.After(time.Second):
|
|
t.Fatal("outbound actor did not start blocked write")
|
|
}
|
|
for i := 0; i < 2; i++ {
|
|
if err := c.SendBestEffortEncoded(context.Background(), proto.MessageFromServer, body, 0); err != nil {
|
|
t.Fatalf("enqueue queued body %d: %v", i, err)
|
|
}
|
|
}
|
|
if got := budget.snapshot(); got != 24 {
|
|
t.Fatalf("writing + queued budget = %d, want 24", got)
|
|
}
|
|
if err := c.SendBestEffortEncoded(context.Background(), proto.MessageFromServer, body, 0); !errors.Is(err, ErrOutboundTrackedBudget) {
|
|
t.Fatalf("over-budget enqueue err = %v, want ErrOutboundTrackedBudget", err)
|
|
}
|
|
select {
|
|
case <-c.outboundDone:
|
|
t.Fatal("best-effort global pressure terminated a healthy connection")
|
|
case <-time.After(50 * time.Millisecond):
|
|
}
|
|
if got := budget.snapshot(); got != 24 {
|
|
t.Fatalf("budget after non-terminal rejection = %d, want existing 24", got)
|
|
}
|
|
if err := tr.Close(); err != nil {
|
|
t.Fatalf("close blocking transport: %v", err)
|
|
}
|
|
select {
|
|
case <-c.outboundDone:
|
|
case <-time.After(time.Second):
|
|
t.Fatal("outbound actor did not stop after transport failure")
|
|
}
|
|
if got := budget.snapshot(); got != 0 {
|
|
t.Fatalf("budget after transport close = %d, want zero", got)
|
|
}
|
|
}
|
|
|
|
func TestOutboundOversizedBodyRejectedBeforeEncryption(t *testing.T) {
|
|
budget := newOutboundTrackedBudget(64 << 20)
|
|
tr := &failAfterTransport{}
|
|
c := newOutboundTestConn(t, tr, budget)
|
|
body := &encodedOutboundMessage{body: make([]byte, maxOutboundBodyBytes+1), typeID: tg.UpdatesTooLongTypeID}
|
|
err := c.SendEncoded(context.Background(), proto.MessageFromServer, body)
|
|
if !errors.Is(err, ErrOutboundMessageTooLarge) {
|
|
t.Fatalf("oversized outbound err = %v, want ErrOutboundMessageTooLarge", err)
|
|
}
|
|
if got := tr.sends.Load(); got != 0 {
|
|
t.Fatalf("oversized outbound wrote %d frames, want zero", got)
|
|
}
|
|
if got := budget.snapshot(); got != 0 {
|
|
t.Fatalf("oversized outbound reserved %d bytes, want zero", got)
|
|
}
|
|
}
|
|
|
|
func TestOutboundCloseRaceDrainsEveryProducerReservation(t *testing.T) {
|
|
budget := newOutboundTrackedBudget(1 << 20)
|
|
c := newOutboundTestConn(t, &failAfterTransport{}, budget)
|
|
body := &encodedOutboundMessage{body: make([]byte, 128), typeID: tg.UpdatesTooLongTypeID}
|
|
start := make(chan struct{})
|
|
var wg sync.WaitGroup
|
|
for i := 0; i < 128; i++ {
|
|
wg.Add(1)
|
|
go func() {
|
|
defer wg.Done()
|
|
<-start
|
|
_ = c.SendBestEffortEncoded(context.Background(), proto.MessageFromServer, body, 0)
|
|
}()
|
|
}
|
|
close(start)
|
|
c.Close()
|
|
wg.Wait()
|
|
if got := budget.snapshot(); got != 0 {
|
|
t.Fatalf("outbound budget after close/enqueue race = %d, want zero", got)
|
|
}
|
|
}
|
|
|
|
func TestOutboundTrackedBudgetAckAndCloseReturnExactly(t *testing.T) {
|
|
t.Run("ack", func(t *testing.T) {
|
|
budget := newOutboundTrackedBudget(64)
|
|
tr := &failAfterTransport{}
|
|
c := newOutboundTestConn(t, tr, budget)
|
|
ctx, cancel := context.WithTimeout(context.Background(), time.Second)
|
|
defer cancel()
|
|
body := &encodedOutboundMessage{body: make([]byte, 12), typeID: tg.UpdatesTooLongTypeID}
|
|
if err := c.SendEncoded(ctx, proto.MessageFromServer, body); err != nil {
|
|
t.Fatalf("send: %v", err)
|
|
}
|
|
if got := budget.snapshot(); got != 12 {
|
|
t.Fatalf("tracked bytes after send = %d, want 12", got)
|
|
}
|
|
data, err := crypto.NewClientCipher(rand.Reader).DecryptFromBuffer(c.key, &bin.Buffer{Buf: tr.lastFrame()})
|
|
if err != nil {
|
|
t.Fatalf("decrypt frame: %v", err)
|
|
}
|
|
c.AckServerMessages([]int64{data.MessageID})
|
|
deadline := time.Now().Add(time.Second)
|
|
for budget.snapshot() != 0 && time.Now().Before(deadline) {
|
|
time.Sleep(time.Millisecond)
|
|
}
|
|
if got := budget.snapshot(); got != 0 {
|
|
t.Fatalf("tracked bytes after ack = %d, want 0", got)
|
|
}
|
|
})
|
|
|
|
t.Run("close", func(t *testing.T) {
|
|
budget := newOutboundTrackedBudget(64)
|
|
c := newOutboundTestConn(t, &failAfterTransport{}, budget)
|
|
ctx, cancel := context.WithTimeout(context.Background(), time.Second)
|
|
defer cancel()
|
|
body := &encodedOutboundMessage{body: make([]byte, 12), typeID: tg.UpdatesTooLongTypeID}
|
|
if err := c.SendEncoded(ctx, proto.MessageFromServer, body); err != nil {
|
|
t.Fatalf("send: %v", err)
|
|
}
|
|
if got := budget.snapshot(); got != 12 {
|
|
t.Fatalf("tracked bytes after send = %d, want 12", got)
|
|
}
|
|
c.Close()
|
|
if got := budget.snapshot(); got != 0 {
|
|
t.Fatalf("tracked bytes after close = %d, want 0", got)
|
|
}
|
|
})
|
|
}
|
|
|
|
func TestOutboundTrackedBudgetWriteFailureReturnsReservation(t *testing.T) {
|
|
budget := newOutboundTrackedBudget(64)
|
|
tr := &failAfterTransport{}
|
|
tr.failAt.Store(1)
|
|
c := newOutboundTestConn(t, tr, budget)
|
|
ctx, cancel := context.WithTimeout(context.Background(), time.Second)
|
|
defer cancel()
|
|
body := &encodedOutboundMessage{body: make([]byte, 12), typeID: tg.UpdatesTooLongTypeID}
|
|
if err := c.SendEncoded(ctx, proto.MessageFromServer, body); err == nil {
|
|
t.Fatal("send unexpectedly succeeded")
|
|
}
|
|
select {
|
|
case <-c.outboundDone:
|
|
case <-time.After(time.Second):
|
|
t.Fatal("write-failed connection did not terminate")
|
|
}
|
|
if got := budget.snapshot(); got != 0 {
|
|
t.Fatalf("tracked bytes after write failure = %d, want 0", got)
|
|
}
|
|
}
|
|
|
|
func TestOutboundStateEvictionReturnsTrackedBudget(t *testing.T) {
|
|
budget := newOutboundTrackedBudget(64)
|
|
state := newOutboundStateWithLimits(budget, 2, 8)
|
|
defer state.releaseAll()
|
|
frames := make([]*outboundFrame, 0, 3)
|
|
for id := int64(1); id <= 3; id++ {
|
|
frame := &outboundFrame{msgID: id, body: make([]byte, 4), reservedBytes: 4}
|
|
frames = append(frames, frame)
|
|
if !budget.reserve(len(frame.body)) {
|
|
t.Fatalf("reserve frame %d", id)
|
|
}
|
|
dropped := state.addReserved(frame)
|
|
if id < 3 && dropped != 0 {
|
|
t.Fatalf("frame %d dropped %d, want 0", id, dropped)
|
|
}
|
|
if id == 3 && dropped != 1 {
|
|
t.Fatalf("third frame dropped %d, want 1", dropped)
|
|
}
|
|
}
|
|
if got := budget.snapshot(); got != 8 {
|
|
t.Fatalf("tracked bytes after eviction = %d, want 8", got)
|
|
}
|
|
if frames[0].body != nil {
|
|
t.Fatal("evicted frame retained its body reference")
|
|
}
|
|
state.releaseAll()
|
|
if got := budget.snapshot(); got != 0 {
|
|
t.Fatalf("tracked bytes after state close = %d, want 0", got)
|
|
}
|
|
}
|
|
|
|
func TestOutboundStateReleasesMixedBodyAndControlBudgets(t *testing.T) {
|
|
bodyBudget := newOutboundTrackedBudget(16)
|
|
controlBudget := newOutboundTrackedBudget(16)
|
|
state := newOutboundStateWithLimits(bodyBudget, 1, 16)
|
|
|
|
if !controlBudget.reserve(4) {
|
|
t.Fatal("reserve control frame")
|
|
}
|
|
controlFrame := &outboundFrame{
|
|
msgID: 1,
|
|
body: make([]byte, 4),
|
|
reservedBytes: 4,
|
|
reservationBudget: controlBudget,
|
|
}
|
|
if dropped := state.addReserved(controlFrame); dropped != 0 {
|
|
t.Fatalf("first add dropped %d, want 0", dropped)
|
|
}
|
|
|
|
if !bodyBudget.reserve(4) {
|
|
t.Fatal("reserve body frame")
|
|
}
|
|
bodyFrame := &outboundFrame{
|
|
msgID: 2,
|
|
body: make([]byte, 4),
|
|
reservedBytes: 4,
|
|
reservationBudget: bodyBudget,
|
|
}
|
|
if dropped := state.addReserved(bodyFrame); dropped != 1 {
|
|
t.Fatalf("second add dropped %d, want control frame eviction", dropped)
|
|
}
|
|
if got := controlBudget.snapshot(); got != 0 {
|
|
t.Fatalf("control budget after eviction = %d, want 0", got)
|
|
}
|
|
if got := bodyBudget.snapshot(); got != 4 {
|
|
t.Fatalf("body budget after eviction = %d, want 4", got)
|
|
}
|
|
if controlFrame.body != nil || controlFrame.reservationBudget != nil {
|
|
t.Fatal("evicted control frame retained body or budget ownership")
|
|
}
|
|
|
|
state.releaseAll()
|
|
if got := bodyBudget.snapshot(); got != 0 {
|
|
t.Fatalf("body budget after state close = %d, want 0", got)
|
|
}
|
|
if bodyFrame.body != nil || bodyFrame.reservationBudget != nil {
|
|
t.Fatal("closed body frame retained body or budget ownership")
|
|
}
|
|
}
|
|
|
|
func TestSendBestEffortQueueFullBehavior(t *testing.T) {
|
|
c := &Conn{metrics: NopMetrics{}, outboundTrackedBudget: newOutboundTrackedBudget(1 << 20)}
|
|
c.outbound = make(chan outboundOp, 1)
|
|
c.outboundControl = make(chan outboundOp, 1)
|
|
c.outboundStop = make(chan struct{})
|
|
// 占满普通队列，模拟出站拥塞。
|
|
c.outbound <- outboundOp{}
|
|
|
|
if err := c.SendBestEffort(context.Background(), proto.MessageFromServer, &mt.MsgsAck{}, 0); err != ErrOutboundQueueFull {
|
|
t.Fatalf("timeout=0 on full queue: err = %v, want ErrOutboundQueueFull", err)
|
|
}
|
|
|
|
start := time.Now()
|
|
if err := c.SendBestEffort(context.Background(), proto.MessageFromServer, &mt.MsgsAck{}, 30*time.Millisecond); err != ErrOutboundQueueFull {
|
|
t.Fatalf("timeout=30ms on full queue: err = %v, want ErrOutboundQueueFull", err)
|
|
}
|
|
if waited := time.Since(start); waited < 30*time.Millisecond {
|
|
t.Fatalf("timeout wait = %v, want >= 30ms", waited)
|
|
}
|
|
|
|
canceled, cancel := context.WithCancel(context.Background())
|
|
cancel()
|
|
if err := c.SendBestEffort(canceled, proto.MessageFromServer, &mt.MsgsAck{}, time.Second); err != context.Canceled {
|
|
t.Fatalf("canceled ctx on full queue: err = %v, want context.Canceled", err)
|
|
}
|
|
|
|
// 腾出队列后快路径应直接入队成功。
|
|
<-c.outbound
|
|
if err := c.SendBestEffort(context.Background(), proto.MessageFromServer, &mt.MsgsAck{}, 0); err != nil {
|
|
t.Fatalf("enqueue after drain: %v", err)
|
|
}
|
|
if got := len(c.outbound); got != 1 {
|
|
t.Fatalf("queued ops = %d, want 1", got)
|
|
}
|
|
}
|
|
|
|
func TestSendAsyncControlQueueBoundary(t *testing.T) {
|
|
c := &Conn{metrics: NopMetrics{}, outboundTrackedBudget: newOutboundTrackedBudget(1 << 20)}
|
|
c.outbound = make(chan outboundOp, 1)
|
|
c.outboundControl = make(chan outboundOp, 1)
|
|
c.outboundStop = make(chan struct{})
|
|
c.outboundControl <- outboundOp{kind: outboundAck}
|
|
|
|
if err := c.SendAsync(context.Background(), proto.MessageFromServer, &mt.MsgsAck{}); err != nil {
|
|
t.Fatalf("SendAsync on full control queue: %v", err)
|
|
}
|
|
if got := len(c.outboundControl); got != 1 {
|
|
t.Fatalf("control queue len = %d, want bounded at 1", got)
|
|
}
|
|
}
|
|
|
|
func TestFrameNeedsAckServiceExceptions(t *testing.T) {
|
|
cases := []struct {
|
|
name string
|
|
id uint32
|
|
want bool
|
|
}{
|
|
{name: "pong", id: mt.PongTypeID, want: false},
|
|
{name: "future_salts", id: mt.FutureSaltsTypeID, want: false},
|
|
{name: "msgs_ack", id: mt.MsgsAckTypeID, want: false},
|
|
{name: "updatesTooLong", id: tg.UpdatesTooLongTypeID, want: true},
|
|
}
|
|
for _, tc := range cases {
|
|
t.Run(tc.name, func(t *testing.T) {
|
|
if got := frameNeedsAck(tc.id); got != tc.want {
|
|
t.Fatalf("frameNeedsAck(%s) = %v, want %v", tc.name, got, tc.want)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestOutboundResendAndAckState(t *testing.T) {
|
|
const dc = 2
|
|
addr, pub, srv := startTestServer(t, Options{DC: dc})
|
|
conn, auth, cipher := dialHandshake(t, addr, dc, pub)
|
|
|
|
clientMsgID := proto.NewMessageIDGen(time.Now)
|
|
sendEncrypted(t, conn, cipher, auth, clientMsgID.New(proto.MessageFromClient), &mt.PingRequest{PingID: 1})
|
|
collectReplies(t, conn, cipher, auth.AuthKey, mt.MsgsAckTypeID)
|
|
srv.Conns().SetReceivesUpdates(auth.SessionID, true)
|
|
|
|
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
|
|
if err := srv.Conns().PushToSession(ctx, auth.SessionID, proto.MessageFromServer, &tg.UpdatesTooLong{}); err != nil {
|
|
cancel()
|
|
t.Fatalf("push: %v", err)
|
|
}
|
|
cancel()
|
|
|
|
original, id, _ := readServerMessage(t, conn, cipher, auth.AuthKey)
|
|
if id != tg.UpdatesTooLongTypeID {
|
|
t.Fatalf("pushed type = %#x, want updatesTooLong", id)
|
|
}
|
|
|
|
resendReqID := clientMsgID.New(proto.MessageFromClient)
|
|
sendEncryptedWithSeq(t, conn, cipher, auth, resendReqID, 3, &mt.MsgResendReq{MsgIDs: []int64{original.MessageID}})
|
|
resent, resentType, _ := readServerMessage(t, conn, cipher, auth.AuthKey)
|
|
if resentType != tg.UpdatesTooLongTypeID {
|
|
t.Fatalf("resent type = %#x, want updatesTooLong", resentType)
|
|
}
|
|
if resent.MessageID != original.MessageID || resent.SeqNo != original.SeqNo {
|
|
t.Fatalf("resent frame = (msg_id=%d seq=%d), want original (msg_id=%d seq=%d)",
|
|
resent.MessageID, resent.SeqNo, original.MessageID, original.SeqNo)
|
|
}
|
|
_, stateType, stateBuf := readServerMessage(t, conn, cipher, auth.AuthKey)
|
|
if stateType != mt.MsgsStateInfoTypeID {
|
|
t.Fatalf("state type = %#x, want msgs_state_info", stateType)
|
|
}
|
|
assertStateInfo(t, stateBuf, resendReqID, []byte{msgStateReceived})
|
|
_, ackType, _ := readServerMessage(t, conn, cipher, auth.AuthKey)
|
|
if ackType != mt.MsgsAckTypeID {
|
|
t.Fatalf("ack type = %#x, want msgs_ack", ackType)
|
|
}
|
|
|
|
sendEncryptedWithSeq(t, conn, cipher, auth, clientMsgID.New(proto.MessageFromClient), 4, &mt.MsgsAck{MsgIDs: []int64{original.MessageID}})
|
|
ackedResendReqID := clientMsgID.New(proto.MessageFromClient)
|
|
sendEncryptedWithSeq(t, conn, cipher, auth, ackedResendReqID, 5, &mt.MsgResendReq{MsgIDs: []int64{original.MessageID}})
|
|
_, ackedStateType, ackedStateBuf := readServerMessage(t, conn, cipher, auth.AuthKey)
|
|
if ackedStateType != mt.MsgsStateInfoTypeID {
|
|
t.Fatalf("after ack type = %#x, want msgs_state_info without resend", ackedStateType)
|
|
}
|
|
assertStateInfo(t, ackedStateBuf, ackedResendReqID, []byte{msgStateReceived})
|
|
}
|
|
|
|
func assertStateInfo(t *testing.T, b *bin.Buffer, reqMsgID int64, want []byte) {
|
|
t.Helper()
|
|
var info mt.MsgsStateInfo
|
|
if err := info.Decode(b); err != nil {
|
|
t.Fatalf("decode msgs_state_info: %v", err)
|
|
}
|
|
if info.ReqMsgID != reqMsgID {
|
|
t.Fatalf("msgs_state_info.req_msg_id = %d, want %d", info.ReqMsgID, reqMsgID)
|
|
}
|
|
if string(info.Info) != string(want) {
|
|
t.Fatalf("msgs_state_info.info = %v, want %v", []byte(info.Info), want)
|
|
}
|
|
}
|