Update MTPROXY_CHECK_TIMEOUT to 45s in docker-compose and documentation; adjust default timeout handling in code for improved performance under slow network conditions.

internal/checkresult/checkresult.go

@@ -3,6 +3,7 @@ package checkresult
 import (
 	"context"
 	"errors"
+	"net"
 
 	"mtproxy_checker/internal/checker"
 )
@@ -18,5 +19,9 @@ func Classify(err error) (exitCode int, message string) {
 	if errors.Is(err, context.DeadlineExceeded) {
 		return 4, "timeout"
 	}
+	var ne net.Error
+	if errors.As(err, &ne) && ne.Timeout() {
+		return 4, "timeout"
+	}
 	return 1, err.Error()
 }

internal/tgquick/probe.go

@@ -113,6 +113,9 @@ func isResPQ(mtInner []byte) bool {
 // Consumes 0x17 payloads with dec so the CTR stream stays aligned with the server; discards MTProto frames until idle.
 func DrainPostInitEE(ctx context.Context, br *bufio.Reader, conn net.Conn, dec cipher.Stream, maxWait time.Duration) error {
 	end := time.Now().Add(maxWait)
+	if d, ok := ctx.Deadline(); ok && d.Before(end) {
+		end = d
+	}
 	var acc []byte
 	const maxDrain = 256 << 10
 	drained := 0
@@ -122,10 +125,15 @@ func DrainPostInitEE(ctx context.Context, br *bufio.Reader, conn net.Conn, dec c
 			return ctx.Err()
 		default:
 		}
-		d := 200 * time.Millisecond
+		d := 500 * time.Millisecond
 		if rem := time.Until(end); rem < d {
 			d = rem
 		}
+		if cd, ok := ctx.Deadline(); ok {
+			if rem := time.Until(cd); rem < d {
+				d = rem
+			}
+		}
 		if d <= 0 {
 			return nil
 		}
@@ -185,22 +193,27 @@ func VerifyResPQ(ctx context.Context, conn net.Conn, enc, dec cipher.Stream, tls
 
 	deadline, ok := ctx.Deadline()
 	if !ok {
-		deadline = time.Now().Add(15 * time.Second)
+		deadline = time.Now().Add(60 * time.Second)
 	}
 
 	var acc []byte
 
 	const maxAcc = 256 << 10
+	// Один read ждёт ответ DC; 3s мало при нагрузке/гео — держим до 30s, но не дольше ctx.
+	const perReadSlack = 30 * time.Second
 	for time.Now().Before(deadline) {
 		select {
 		case <-ctx.Done():
 			return ctx.Err()
 		default:
 		}
-		chunkDeadline := time.Now().Add(3 * time.Second)
+		chunkDeadline := time.Now().Add(perReadSlack)
 		if chunkDeadline.After(deadline) {
 			chunkDeadline = deadline
 		}
+		if !chunkDeadline.After(time.Now().Add(50 * time.Millisecond)) {
+			return fmt.Errorf("%w: not enough time left waiting for resPQ", context.DeadlineExceeded)
+		}
 		_ = conn.SetReadDeadline(chunkDeadline)
 		var chunk []byte
 		var rerr error