internal/mtprotoedge/transport_compat_test.go
Rama main · réplica de lectura del repositorio original.
package mtprotoedge
import (
"bytes"
"encoding/binary"
"io"
"net"
"testing"
"time"
"github.com/iamxvbaba/td/bin"
)
type messageWriteTestConn struct {
bytes.Buffer
writes int
maxWrite int
deadlines []time.Time
}
func (c *messageWriteTestConn) Read([]byte) (int, error) { return 0, io.EOF }
func (c *messageWriteTestConn) Write(p []byte) (int, error) {
c.writes++
if c.maxWrite > 0 && len(p) > c.maxWrite {
p = p[:c.maxWrite]
}
return c.Buffer.Write(p)
}
func (*messageWriteTestConn) Close() error { return nil }
func (*messageWriteTestConn) LocalAddr() net.Addr { return messageWriteTestAddr("local") }
func (*messageWriteTestConn) RemoteAddr() net.Addr { return messageWriteTestAddr("remote") }
func (*messageWriteTestConn) SetDeadline(time.Time) error { return nil }
func (*messageWriteTestConn) SetReadDeadline(time.Time) error { return nil }
func (c *messageWriteTestConn) SetWriteDeadline(d time.Time) error {
c.deadlines = append(c.deadlines, d)
return nil
}
type messageWriteTestAddr string
func (a messageWriteTestAddr) Network() string { return "message-write-test" }
func (a messageWriteTestAddr) String() string { return string(a) }
type countWriteBuffer struct {
bytes.Buffer
writes int
}
func TestProgressiveDeadlineWriterChunksLargeRawPacket(t *testing.T) {
raw := &messageWriteTestConn{maxWrite: 8 << 10}
hard := time.Now().Add(time.Minute)
w := &progressiveDeadlineWriter{
conn: raw, hardDeadline: hard, idleTimeout: time.Second, chunkBytes: 32 << 10,
}
payload := bytes.Repeat([]byte{0x5a}, 192<<10)
n, err := w.Write(payload)
if err != nil {
t.Fatalf("progressive write: %v", err)
}
if n != len(payload) || !bytes.Equal(raw.Bytes(), payload) {
t.Fatalf("progressive write bytes = %d/%d", n, len(raw.Bytes()))
}
if raw.writes < len(payload)/(8<<10) {
t.Fatalf("physical chunks = %d, want progress across partial writes", raw.writes)
}
if len(raw.deadlines) != raw.writes {
t.Fatalf("deadline refreshes = %d, writes = %d", len(raw.deadlines), raw.writes)
}
for _, deadline := range raw.deadlines {
if deadline.After(hard) {
t.Fatalf("idle deadline %v exceeded hard deadline %v", deadline, hard)
}
}
}
func (w *countWriteBuffer) Write(p []byte) (int, error) {
w.writes++
return w.Buffer.Write(p)
}
func TestQuickAckResponseEncoding(t *testing.T) {
const token = 0x01020304
abridged := (&quickAckAbridgedCodec{}).quickAckResponse(token)
if want := []byte{0x81, 0x02, 0x03, 0x04}; !bytes.Equal(abridged[:], want) {
t.Fatalf("abridged quick ack = %x, want %x", abridged, want)
}
intermediate := (&quickAckIntermediateCodec{}).quickAckResponse(token)
if want := []byte{0x04, 0x03, 0x02, 0x81}; !bytes.Equal(intermediate[:], want) {
t.Fatalf("intermediate quick ack = %x, want %x", intermediate, want)
}
}
func TestQuickAckReadFlags(t *testing.T) {
payload := []byte{1, 2, 3, 4, 5, 6, 7, 8}
abridgedPacket := append([]byte{0x80 | byte(len(payload)/bin.Word)}, payload...)
var got bin.Buffer
requested, err := readQuickAckAbridged(bytes.NewReader(abridgedPacket), &got)
if err != nil {
t.Fatalf("read abridged: %v", err)
}
if !requested {
t.Fatal("abridged quick ack flag was not detected")
}
if !bytes.Equal(got.Raw(), payload) {
t.Fatalf("abridged payload = %x, want %x", got.Raw(), payload)
}
var header [4]byte
binary.LittleEndian.PutUint32(header[:], uint32(len(payload))|quickAckResponseFlag)
intermediatePacket := append(header[:], payload...)
requested, err = readQuickAckIntermediate(bytes.NewReader(intermediatePacket), &got, false)
if err != nil {
t.Fatalf("read intermediate: %v", err)
}
if !requested {
t.Fatal("intermediate quick ack flag was not detected")
}
if !bytes.Equal(got.Raw(), payload) {
t.Fatalf("intermediate payload = %x, want %x", got.Raw(), payload)
}
}
func TestCompatPaddedIntermediateWriteRoundTrip(t *testing.T) {
codec := &quickAckPaddedIntermediateCodec{}
// Write multiple frames in a row: verify the reused write buffer does not
// cross-contaminate packets, and padding is still correctly stripped by the reader.
for i := 0; i < 8; i++ {
var payload bin.Buffer
payload.PutInt32(int32(0x11220000 + i))
payload.PutInt32(int32(0x33440000 + i))
var out countWriteBuffer
if err := codec.Write(&out, &payload); err != nil {
t.Fatalf("write %d: %v", i, err)
}
if out.writes < 2 || out.writes > 3 {
t.Fatalf("write %d: writes = %d, want header/payload[/padding] segments", i, out.writes)
}
total := binary.LittleEndian.Uint32(out.Bytes()[:4])
if int(total) != len(out.Bytes())-4 {
t.Fatalf("write %d: header length = %d, body = %d", i, total, len(out.Bytes())-4)
}
var got bin.Buffer
requested, err := readQuickAckIntermediate(bytes.NewReader(out.Bytes()), &got, true)
if err != nil {
t.Fatalf("read back %d: %v", i, err)
}
if requested {
t.Fatalf("read back %d: unexpected quick ack flag", i)
}
if !bytes.Equal(got.Raw(), payload.Raw()) {
t.Fatalf("read back %d: payload = %x, want %x", i, got.Raw(), payload.Raw())
}
}
}
func TestCompatTransportCodecsWriteSegmentedPacketWithoutFullCopy(t *testing.T) {
var payload bin.Buffer
payload.PutInt32(0x01020304)
payload.PutInt32(0x05060708)
t.Run("abridged", func(t *testing.T) {
var out countWriteBuffer
if err := (&quickAckAbridgedCodec{}).Write(&out, &payload); err != nil {
t.Fatalf("write: %v", err)
}
if out.writes != 2 {
t.Fatalf("generic writer calls = %d, want header+payload; raw TCP uses vectored I/O", out.writes)
}
if got, want := out.Bytes()[0], byte(payload.Len()/bin.Word); got != want {
t.Fatalf("abridged header = %#x, want %#x", got, want)
}
})
t.Run("intermediate", func(t *testing.T) {
var out countWriteBuffer
if err := (&quickAckIntermediateCodec{}).Write(&out, &payload); err != nil {
t.Fatalf("write: %v", err)
}
if out.writes != 2 {
t.Fatalf("generic writer calls = %d, want header+payload; raw TCP uses vectored I/O", out.writes)
}
if got, want := binary.LittleEndian.Uint32(out.Bytes()[:4]), uint32(payload.Len()); got != want {
t.Fatalf("intermediate length = %d, want %d", got, want)
}
})
}
func TestCompatRawTransportUsesProgressiveWriterForLargePacket(t *testing.T) {
var payload bin.Buffer
payload.Put(bytes.Repeat([]byte{0x6b}, 192<<10))
raw := &messageWriteTestConn{maxWrite: 8 << 10}
conn := &compatTransportConn{conn: raw, codec: &quickAckAbridgedCodec{}}
if err := conn.SendDeadline(time.Now().Add(time.Minute), &payload); err != nil {
t.Fatalf("send large raw packet: %v", err)
}
if raw.writes < 20 {
t.Fatalf("large raw packet writes = %d, want observable progressive chunks", raw.writes)
}
if len(raw.deadlines) != raw.writes+1 { // initial hard deadline + one per progress write.
t.Fatalf("large packet deadline updates = %d, writes = %d", len(raw.deadlines), raw.writes)
}
var decoded bin.Buffer
requested, err := readQuickAckAbridged(bytes.NewReader(raw.Bytes()), &decoded)
if err != nil {
t.Fatalf("read large packet: %v", err)
}
if requested || !bytes.Equal(decoded.Raw(), payload.Raw()) {
t.Fatal("progressive raw write changed transport packet")
}
}
func TestCompatTransportWebSocketWritesOneMessagePerPacket(t *testing.T) {
var payload bin.Buffer
payload.PutInt32(0x01020304)
payload.PutInt32(0x05060708)
raw := &messageWriteTestConn{}
conn := &compatTransportConn{
conn: &transportPacketMessageConn{Conn: raw},
codec: &quickAckAbridgedCodec{},
transportPacketMessages: true,
}
var scratch []byte
if err := conn.SendDeadlineWithScratch(time.Time{}, &payload, &scratch); err != nil {
t.Fatalf("send: %v", err)
}
if raw.writes != 1 {
t.Fatalf("websocket writes = %d, want one complete message", raw.writes)
}
want := append([]byte{byte(payload.Len() / bin.Word)}, payload.Raw()...)
if !bytes.Equal(raw.Bytes(), want) {
t.Fatalf("websocket message = %x, want %x", raw.Bytes(), want)
}
if len(scratch) != len(want) {
t.Fatalf("shared scratch length = %d, want %d", len(scratch), len(want))
}
}
func TestCompatTransportWebSocketDirectWriteUsesBoundedFallback(t *testing.T) {
var payload bin.Buffer
payload.PutInt32(0x11223344)
payload.PutInt32(0x55667788)
raw := &messageWriteTestConn{}
conn := &compatTransportConn{
conn: &transportPacketMessageConn{Conn: raw},
codec: &quickAckAbridgedCodec{},
transportPacketMessages: true,
}
if err := conn.SendDeadline(time.Time{}, &payload); err != nil {
t.Fatalf("direct send: %v", err)
}
if raw.writes != 1 {
t.Fatalf("direct websocket writes = %d, want one complete message", raw.writes)
}
if cap(conn.directMessageScratch) == 0 || cap(conn.directMessageScratch) > maxRetainedDirectMessageScratch {
t.Fatalf("direct scratch capacity = %d, want bounded retained buffer", cap(conn.directMessageScratch))
}
}
func TestCompatTransportWebSocketDoesNotRetryShortMessageWrite(t *testing.T) {
var payload bin.Buffer
payload.PutInt32(0x01020304)
payload.PutInt32(0x05060708)
raw := &messageWriteTestConn{maxWrite: 1}
conn := &compatTransportConn{
conn: &transportPacketMessageConn{Conn: raw},
codec: &quickAckAbridgedCodec{},
transportPacketMessages: true,
}
if err := conn.SendDeadline(time.Time{}, &payload); err == nil {
t.Fatal("short websocket message write unexpectedly succeeded")
}
if raw.writes != 1 {
t.Fatalf("short websocket writes = %d, want no multi-message retry", raw.writes)
}
}