Fix header size check in PseudoTcp::parse().

webrtc/p2p/base/pseudotcp.cc

 /*
  *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 555 matching lines @@
   if (len > 0) {
     m_lastsend = now;
   }
   m_lasttraffic = now;
   m_bOutgoing = true;
 
   return IPseudoTcpNotify::WR_SUCCESS;
 }
 
 bool PseudoTcp::parse(const uint8_t* buffer, uint32_t size) {
-  if (size < 12)
+  if (size < HEADER_SIZE)
     return false;
 
   Segment seg;
   seg.conv = bytes_to_long(buffer);
   seg.seq = bytes_to_long(buffer + 4);
   seg.ack = bytes_to_long(buffer + 8);
   seg.flags = buffer[13];
   seg.wnd = bytes_to_short(buffer + 14);
 
   seg.tsval = bytes_to_long(buffer + 16);
@@ skipping 690 matching lines @@
   m_rbuf_len = new_size;
   m_rwnd_scale = scale_factor;
   m_ssthresh = new_size;
 
   size_t available_space = 0;
   m_rbuf.GetWriteRemaining(&available_space);
   m_rcv_wnd = static_cast<uint32_t>(available_space);
 }
 
 }  // namespace cricket