Allow the number of undecryptable QUIC packets buffered before the

net/quic/quic_connection.h

 // 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.
 //
 // The entity that handles framing writes for a Quic client or server.
 // Each QuicSession will have a connection associated with it.
 //
 // On the server side, the Dispatcher handles the raw reads, and hands off
 // packets via ProcessUdpPacket for framing and processing.
 //
@@ skipping 695 matching lines @@
 
   // Largest sequence number sent by the peer which had a stop waiting frame.
   QuicPacketSequenceNumber largest_seen_packet_with_stop_waiting_;
 
   // Collection of packets which were received before encryption was
   // established, but which could not be decrypted.  We buffer these on
   // the assumption that they could not be processed because they were
   // sent with the INITIAL encryption and the CHLO message was lost.
   std::deque<QuicEncryptedPacket*> undecryptable_packets_;
 
+  // Maximum number of undecryptable packets the connection will store.
+  size_t max_undecryptable_packets_;
+
   // When the version negotiation packet could not be sent because the socket
   // was not writable, this is set to true.
   bool pending_version_negotiation_packet_;
 
   // When packets could not be sent because the socket was not writable,
   // they are added to this list.  All corresponding frames are in
   // unacked_packets_ if they are to be retransmitted.
   QueuedPacketList queued_packets_;
 
   // Contains the connection close packet if the connection has been closed.
@@ skipping 85 matching lines @@
   // If non-empty this contains the set of versions received in a
   // version negotiation packet.
   QuicVersionVector server_supported_versions_;
 
   DISALLOW_COPY_AND_ASSIGN(QuicConnection);
 };
 
 }  // namespace net
 
 #endif  // NET_QUIC_QUIC_CONNECTION_H_