Land Recent QUIC changes.

net/tools/quic/quic_dispatcher.cc

 // 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/tools/quic/quic_dispatcher.h"
 
 #include <errno.h>
 
 #include "base/logging.h"
 #include "base/stl_util.h"
@@ skipping 40 matching lines @@
 QuicDispatcher::~QuicDispatcher() {
   STLDeleteValues(&session_map_);
   STLDeleteElements(&closed_session_list_);
 }
 
 int QuicDispatcher::WritePacket(const char* buffer, size_t buf_len,
                                 const IPAddressNumber& self_address,
                                 const IPEndPoint& peer_address,
                                 QuicBlockedWriterInterface* writer,
                                 int* error) {
+  if (write_blocked_) {
+    write_blocked_list_.AddBlockedObject(writer);
+    *error = EAGAIN;
+    return -1;
+  }
+
   int rc = QuicSocketUtils::WritePacket(fd_, buffer, buf_len,
                                         self_address, peer_address,
                                         error);
   if (rc == -1 && (*error == EWOULDBLOCK || *error == EAGAIN)) {
     write_blocked_list_.AddBlockedObject(writer);
     write_blocked_ = true;
   }
   return rc;
 }
 
@@ skipping 113 matching lines @@
   QuicServerSession* session = new QuicServerSession(
        config_, new QuicConnection(guid, client_address, helper, true), this);
   session->Initialize(crypto_config_);
   return session;
 }
 
 }  // namespace tools
 }  // namespace net