Drop packets which are larger than kMaxPacketSize, instead of closing the connection with QUIC_PACK…

net/quic/quic_framer.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/quic/quic_framer.h"
 
 #include <stdint.h>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
@@ skipping 584 matching lines @@
     DLOG(WARNING) << "Unable to process packet header.  Stopping parsing.";
     return false;
   }
 
   if (!visitor_->OnPacketHeader(header)) {
     // The visitor suppresses further processing of the packet.
     return true;
   }
 
   if (packet.length() > kMaxPacketSize) {
-    DLOG(WARNING) << "Packet too large: " << packet.length();
+    // If the packet has gotten this far, it should not be too large.
+    LOG(DFATAL) << "Packet too large:" << packet.length();
     return RaiseError(QUIC_PACKET_TOO_LARGE);
   }
 
   // Handle the payload.
   if (!header.fec_flag) {
     if (header.is_in_fec_group == IN_FEC_GROUP) {
       StringPiece payload = reader.PeekRemainingPayload();
       visitor_->OnFecProtectedPayload(payload);
     }
     if (!ProcessFrameData(&reader, header)) {
@@ skipping 1599 matching lines @@
 
 bool QuicFramer::RaiseError(QuicErrorCode error) {
   DVLOG(1) << "Error: " << QuicUtils::ErrorToString(error)
            << " detail: " << detailed_error_;
   set_error(error);
   visitor_->OnError(this);
   return false;
 }
 
 }  // namespace net