DO NOT COMMIT: SPDY 4: Hack SpdyFramer to turn SYN_STREAM and SYN_REPLY into HEADERS semi-transpare…

net/spdy/spdy_frame_builder.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/spdy/spdy_frame_builder.h"
 
 #include <limits>
 
 #include "base/logging.h"
 #include "net/spdy/spdy_framer.h"
@@ skipping 84 matching lines @@
 
 bool SpdyFrameBuilder::WriteFramePrefix(const SpdyFramer& framer,
                                         SpdyFrameType type,
                                         uint8 flags,
                                         SpdyStreamId stream_id) {
   DCHECK_LE(DATA, type);
   DCHECK_GE(LAST_CONTROL_TYPE, type);
   DCHECK_EQ(0u, stream_id & ~kStreamIdMask);
   DCHECK_LE(4, framer.protocol_version());
   bool success = true;
-  DCHECK_GT(1u<<16, capacity_);  // Make sure length fits in 2B.
-  success &= WriteUInt16(capacity_);
+  size_t length_field = capacity_ - 8;
+  DCHECK_GT(1u<<16, length_field);  // Make sure length fits in 16.
+  success &= WriteUInt16(length_field);
   success &= WriteUInt8(type);
   success &= WriteUInt8(flags);
   success &= WriteUInt32(stream_id);
-  DCHECK_EQ(framer.GetDataFrameMinimumSize(), length());
+  DCHECK_EQ(length(), 8u);
   return success;
 }
 
 bool SpdyFrameBuilder::WriteString(const std::string& value) {
   if (value.size() > 0xffff) {
     DCHECK(false) << "Tried to write string with length > 16bit.";
     return false;
   }
 
   if (!WriteUInt16(static_cast<int>(value.size())))
@@ skipping 19 matching lines @@
   memcpy(dest, data, data_len);
   Seek(data_len);
   return true;
 }
 
 bool SpdyFrameBuilder::RewriteLength(const SpdyFramer& framer) {
   if (framer.protocol_version() < 4) {
     return OverwriteLength(framer,
                            length_ - framer.GetControlFrameHeaderSize());
   } else {
-    return OverwriteLength(framer, length_);
+    return OverwriteLength(framer, length_ - 8);
   }
 }
 
 bool SpdyFrameBuilder::OverwriteLength(const SpdyFramer& framer,
                                        size_t length) {
   bool success = false;
   const size_t old_length = length_;
 
   if (framer.protocol_version() < 4) {
     FlagsAndLength flags_length = CreateFlagsAndLength(
@@ skipping 21 matching lines @@
 
   if (length_ + length > capacity_) {
     DCHECK(false);
     return false;
   }
 
   return true;
 }
 
 }  // namespace net