Add QuicStream and friends to QUIC code.

net/quic/reliable_quic_stream.cc

Index: net/quic/reliable_quic_stream.cc
diff --git a/net/quic/reliable_quic_stream.cc b/net/quic/reliable_quic_stream.cc
new file mode 100644
index 0000000000000000000000000000000000000000..3cdde2648ebb6bb2d8d821dc0ae7f1396eb7db60
--- /dev/null
+++ b/net/quic/reliable_quic_stream.cc
@@ -0,0 +1,126 @@
+// Copyright (c) 2012 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/reliable_quic_stream.h"
+
+#include "net/quic/quic_session.h"
+
+using base::StringPiece;
+
+namespace net {
+
+ReliableQuicStream::ReliableQuicStream(QuicStreamId id,
+                                       QuicSession* session)
+    : sequencer_(this),
+      id_(id),
+      offset_(0),
+      session_(session),
+      error_(QUIC_NO_ERROR),
+      read_side_closed_(false),
+      write_side_closed_(false) {
+}
+
+ReliableQuicStream::~ReliableQuicStream() {
+}
+
+bool ReliableQuicStream::WillAcceptStreamFrame(
+    const QuicStreamFrame& frame) const {
+  if (read_side_closed_) {
+    return false;
+  }
+  if (frame.stream_id != id_) {
+    LOG(ERROR) << "Error!";
+    return false;
+  }
+  return sequencer_.WillAcceptStreamFrame(frame);
+}
+
+bool ReliableQuicStream::OnStreamFrame(const QuicStreamFrame& frame) {
+  DCHECK_EQ(frame.stream_id, id_);
+  if (read_side_closed_) {
+    // This can only happen if a client sends data after sending a fin or stream
+    // reset.
+    Close(QUIC_STREAM_DATA_AFTER_TERMINATION);
+    return false;
+  }
+
+  bool accepted = sequencer_.OnStreamFrame(frame);
+
+  if (frame.fin) {
+    sequencer_.CloseStreamAtOffset(frame.offset + frame.data.size(),
+                                   true);
+  }
+
+  return accepted;
+}
+
+void ReliableQuicStream::OnStreamReset(QuicErrorCode error,
+                                       QuicStreamOffset offset) {
+  error_ = error;
+  sequencer_.CloseStreamAtOffset(offset, false);  // Full close
+}
+
+void ReliableQuicStream::ConnectionClose(QuicErrorCode error, bool from_peer) {
+  error_ = error;
+  if (from_peer) {
+    TerminateFromPeer(false);
+  } else {
+    CloseWriteSide();
+    CloseReadSide();
+  }
+}
+
+void ReliableQuicStream::TerminateFromPeer(bool half_close) {
+  if (!half_close) {
+    CloseWriteSide();
+  }
+  CloseReadSide();
+}
+
+void ReliableQuicStream::Close(QuicErrorCode error) {
+  error_ = error;
+  session()->SendRstStream(id(), error, offset_);
+}
+
+bool ReliableQuicStream::IsHalfClosed() {
+  return sequencer_.IsHalfClosed();
+}
+
+bool ReliableQuicStream::HasBytesToRead() {
+  return sequencer_.HasBytesToRead();
+}
+
+int ReliableQuicStream::WriteData(StringPiece data, bool fin) {
+  if (write_side_closed_) {
+    DLOG(ERROR) << "Attempt to write when the write side is closed";
+    return 0;
+  }
+
+  session()->WriteData(id(), data, offset_, fin);
+  offset_ += data.length();
+  if (fin) {
+    CloseWriteSide();
+  }
+  return data.length();
+}
+
+void ReliableQuicStream::CloseReadSide() {
+  DLOG(INFO) << "Done reading from stream " << id();
+
+  read_side_closed_ = true;
+  if (write_side_closed_) {
+    session_->CloseStream(id());
+  }
+}
+
+void ReliableQuicStream::CloseWriteSide() {
+  DLOG(INFO) << "Done writing to stream " << id();
+
+  write_side_closed_ = true;
+  if (read_side_closed_) {
+    session_->CloseStream(id());
+  }
+}
+
+}  // namespace net