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

net/tools/quic/quic_packet_reader.h

 // Copyright 2015 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.
 
 // A class to read incoming QUIC packets from the UDP socket.
 
 #ifndef NET_TOOLS_QUIC_QUIC_PACKET_READER_H_
 #define NET_TOOLS_QUIC_QUIC_PACKET_READER_H_
 
 #include <netinet/in.h>
@@ skipping 43 matching lines @@
 
  private:
   // Initialize the internal state of the reader.
   void Initialize();
 
   // Storage only used when recvmmsg is available.
 
   // cbuf_ is used for ancillary data from the kernel on recvmmsg.
   char cbuf_[kSpaceForOverflowAndIp * kNumPacketsPerReadMmsgCall];
   // buf_ is used for the data read from the kernel on recvmmsg.
-  char buf_[2 * kMaxPacketSize * kNumPacketsPerReadMmsgCall];
+  // TODO(danzh): change it to be a pointer to avoid the allocation on the stack
+  // from exceeding maximum allowed frame size.
+  char buf_[kMaxPacketSize * kNumPacketsPerReadMmsgCall];
   // iov_ and mmsg_hdr_ are used to supply cbuf and buf to the recvmmsg call.
   iovec iov_[kNumPacketsPerReadMmsgCall];
   mmsghdr mmsg_hdr_[kNumPacketsPerReadMmsgCall];
   // raw_address_ is used for address information provided by the recvmmsg
   // call on the packets.
   struct sockaddr_storage raw_address_[kNumPacketsPerReadMmsgCall];
 
   DISALLOW_COPY_AND_ASSIGN(QuicPacketReader);
 };
 
 }  // namespace tools
 }  // namespace net
 
 #endif  // NET_TOOLS_QUIC_QUIC_PACKET_READER_H_