Do not crash on null stream in writing to bidirectional streams

net/quic/bidirectional_stream_quic_impl_unittest.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/quic/bidirectional_stream_quic_impl.h"
 
 #include "base/callback_helpers.h"
 #include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
@@ skipping 50 matching lines @@
                    int read_buf_len,
                    std::unique_ptr<base::Timer> timer)
       : read_buf_(read_buf),
         read_buf_len_(read_buf_len),
         timer_(std::move(timer)),
         loop_(nullptr),
         error_(OK),
         on_data_read_count_(0),
         on_data_sent_count_(0),
         not_expect_callback_(false),
+        on_failed_called_(false),
         send_request_headers_automatically_(true) {
     loop_.reset(new base::RunLoop);
   }
 
   ~TestDelegateBase() override {}
 
   void OnStreamReady(bool request_headers_sent) override {
+    CHECK(!on_failed_called_);
     EXPECT_EQ(send_request_headers_automatically_, request_headers_sent);
     CHECK(!not_expect_callback_);
     loop_->Quit();
   }
 
   void OnHeadersReceived(const SpdyHeaderBlock& response_headers) override {
+    CHECK(!on_failed_called_);
     CHECK(!not_expect_callback_);
 
     response_headers_ = response_headers;
     loop_->Quit();
   }
 
   void OnDataRead(int bytes_read) override {
+    CHECK(!on_failed_called_);
     CHECK(!not_expect_callback_);
     CHECK(!callback_.is_null());
 
     ++on_data_read_count_;
     CHECK_GE(bytes_read, OK);
     data_received_.append(read_buf_->data(), bytes_read);
     base::ResetAndReturn(&callback_).Run(bytes_read);
   }
 
   void OnDataSent() override {
+    CHECK(!on_failed_called_);
     CHECK(!not_expect_callback_);
 
     ++on_data_sent_count_;
     loop_->Quit();
   }
 
   void OnTrailersReceived(const SpdyHeaderBlock& trailers) override {
+    CHECK(!on_failed_called_);
     CHECK(!not_expect_callback_);
 
     trailers_ = trailers;
     loop_->Quit();
   }
 
   void OnFailed(int error) override {
+    CHECK(!on_failed_called_);
     CHECK(!not_expect_callback_);
     CHECK_EQ(OK, error_);
     CHECK_NE(OK, error);
 
+    on_failed_called_ = true;
     error_ = error;
     loop_->Quit();
   }
 
   void Start(const BidirectionalStreamRequestInfo* request_info,
              const BoundNetLog& net_log,
              const base::WeakPtr<QuicChromiumClientSession> session) {
     stream_.reset(new BidirectionalStreamQuicImpl(session));
     stream_->Start(request_info, net_log, send_request_headers_automatically_,
                    this, nullptr);
@@ skipping 50 matching lines @@
     send_request_headers_automatically_ = false;
   }
 
   // Const getters for internal states.
   const std::string& data_received() const { return data_received_; }
   int error() const { return error_; }
   const SpdyHeaderBlock& response_headers() const { return response_headers_; }
   const SpdyHeaderBlock& trailers() const { return trailers_; }
   int on_data_read_count() const { return on_data_read_count_; }
   int on_data_sent_count() const { return on_data_sent_count_; }
+  bool on_failed_called() const { return on_failed_called_; }
 
  protected:
   // Quits |loop_|.
   void QuitLoop() { loop_->Quit(); }
 
   // Deletes |stream_|.
   void DeleteStream() { stream_.reset(); }
 
  private:
   std::unique_ptr<BidirectionalStreamQuicImpl> stream_;
   scoped_refptr<IOBuffer> read_buf_;
   int read_buf_len_;
   std::unique_ptr<base::Timer> timer_;
   std::string data_received_;
   std::unique_ptr<base::RunLoop> loop_;
   SpdyHeaderBlock response_headers_;
   SpdyHeaderBlock trailers_;
   int error_;
   int on_data_read_count_;
   int on_data_sent_count_;
   // This is to ensure that delegate callback is not invoked synchronously when
   // calling into |stream_|.
   bool not_expect_callback_;
+  bool on_failed_called_;
   CompletionCallback callback_;
   bool send_request_headers_automatically_;
 
   DISALLOW_COPY_AND_ASSIGN(TestDelegateBase);
 };
 
 // A delegate that deletes the stream in a particular callback.
 class DeleteStreamDelegate : public TestDelegateBase {
  public:
   // Specifies in which callback the stream can be deleted.
@@ skipping 1044 matching lines @@
 
   // Send a DATA frame.
   scoped_refptr<StringIOBuffer> buf(new StringIOBuffer(kUploadData));
 
   delegate->SendData(buf, buf->size(), false);
   delegate->WaitUntilNextCallback();  // OnDataSent
 
   delegate->CancelStream();
   base::MessageLoop::current()->RunUntilIdle();
 
+  // Try to send data after Cancel(), should not get called back.
+  delegate->SendData(buf, buf->size(), false);
+  base::MessageLoop::current()->RunUntilIdle();
+  EXPECT_FALSE(delegate->on_failed_called());
+
   EXPECT_EQ(0, delegate->on_data_read_count());
   EXPECT_EQ(1, delegate->on_data_sent_count());
   EXPECT_EQ(kProtoQUIC1SPDY3, delegate->GetProtocol());
   EXPECT_EQ(static_cast<int64_t>(spdy_request_headers_frame_length +
                                  strlen(kUploadData)),
             delegate->GetTotalSentBytes());
   EXPECT_EQ(static_cast<int64_t>(spdy_response_headers_frame_length),
             delegate->GetTotalReceivedBytes());
 }
 
 TEST_P(BidirectionalStreamQuicImplTest, SessionClosedBeforeReadData) {
-  SetRequest("GET", "/", DEFAULT_PRIORITY);
+  SetRequest("POST", "/", DEFAULT_PRIORITY);
   size_t spdy_request_headers_frame_length;
-  AddWrite(ConstructRequestHeadersPacket(1, kFin, DEFAULT_PRIORITY,
+  AddWrite(ConstructRequestHeadersPacket(1, !kFin, DEFAULT_PRIORITY,
                                          &spdy_request_headers_frame_length));
   Initialize();
 
   BidirectionalStreamRequestInfo request;
-  request.method = "GET";
+  request.method = "POST";
   request.url = GURL("http://www.google.com/");
-  request.end_stream_on_headers = true;
+  request.end_stream_on_headers = false;
   request.priority = DEFAULT_PRIORITY;
 
   scoped_refptr<IOBuffer> read_buffer(new IOBuffer(kReadBufferSize));
   std::unique_ptr<TestDelegateBase> delegate(
       new TestDelegateBase(read_buffer.get(), kReadBufferSize));
   delegate->Start(&request, net_log().bound(), session()->GetWeakPtr());
   delegate->WaitUntilNextCallback();  // OnStreamReady
 
   // Server acks the request.
   ProcessPacket(ConstructServerAckPacket(1, 0, 0));
 
   // Server sends the response headers.
   SpdyHeaderBlock response_headers = ConstructResponseHeaders("200");
 
   size_t spdy_response_headers_frame_length;
   QuicStreamOffset offset = 0;
   ProcessPacket(ConstructResponseHeadersPacket(
       2, !kFin, response_headers, &spdy_response_headers_frame_length,
       &offset));
 
   delegate->WaitUntilNextCallback();  // OnHeadersReceived
   TestCompletionCallback cb;
   int rv = delegate->ReadData(cb.callback());
   EXPECT_EQ(ERR_IO_PENDING, rv);
   session()->connection()->CloseConnection(
       QUIC_NO_ERROR, "test", ConnectionCloseBehavior::SILENT_CLOSE);
   delegate->WaitUntilNextCallback();  // OnFailed
+  EXPECT_TRUE(delegate->on_failed_called());
 
+  // Try to send data after OnFailed(), should not get called back.
+  scoped_refptr<StringIOBuffer> buf(new StringIOBuffer(kUploadData));
+  delegate->SendData(buf, buf->size(), false);
   base::MessageLoop::current()->RunUntilIdle();
 
   EXPECT_EQ(ERR_UNEXPECTED, delegate->ReadData(cb.callback()));
   EXPECT_EQ(ERR_UNEXPECTED, delegate->error());
   EXPECT_EQ(0, delegate->on_data_read_count());
   EXPECT_EQ(0, delegate->on_data_sent_count());
   EXPECT_EQ(kProtoQUIC1SPDY3, delegate->GetProtocol());
   EXPECT_EQ(static_cast<int64_t>(spdy_request_headers_frame_length),
             delegate->GetTotalSentBytes());
   EXPECT_EQ(static_cast<int64_t>(spdy_response_headers_frame_length),
@@ skipping 206 matching lines @@
 
   base::MessageLoop::current()->RunUntilIdle();
 
   EXPECT_EQ(1, delegate->on_data_read_count());
   EXPECT_EQ(0, delegate->on_data_sent_count());
 }
 
 }  // namespace test
 
 }  // namespace net