HTTP2 draft 14 support

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 103 matching lines @@
         << " is longer than the maximum allowed length.";
   }
 
   offset_ += length_;
   length_ = 0;
 
   // Assume all remaining capacity will be used for this frame. If not,
   // the length will get overwritten when we begin the next frame.
   // Don't check for length limits here because this may be larger than the
   // actual frame length.
-  success &= WriteUInt16(capacity_ - offset_ - framer.GetPrefixLength(type));
+  success &= WriteUInt24(capacity_ - offset_ - framer.GetPrefixLength(type));
   success &= WriteUInt8(
       SpdyConstants::SerializeFrameType(version_, type));
   success &= WriteUInt8(flags);
   success &= WriteUInt32(stream_id);
   DCHECK_EQ(framer.GetDataFrameMinimumSize(), length_);
   return success;
 }
 
 bool SpdyFrameBuilder::WriteString(const std::string& value) {
   if (value.size() > 0xffff) {
@@ skipping 47 matching lines @@
     FlagsAndLength flags_length = CreateFlagsAndLength(
         0,  // We're not writing over the flags value anyway.
         length);
 
     // Write into the correct location by temporarily faking the offset.
     length_ = 5;  // Offset at which the length field occurs.
     success = WriteBytes(reinterpret_cast<char*>(&flags_length) + 1,
                          sizeof(flags_length) - 1);
   } else {
     length_ = 0;
-    success = WriteUInt16(length);
+    success = WriteUInt24(length);
   }
 
   length_ = old_length;
   return success;
 }
 
 bool SpdyFrameBuilder::OverwriteFlags(const SpdyFramer& framer,
                                       uint8 flags) {
   DCHECK_LT(SPDY3, framer.protocol_version());
   bool success = false;
   const size_t old_length = length_;
-  // Flags are the fourth octet in the frame prefix.
-  length_ = 3;
+  // Flags are the fifth octet in the frame prefix.
+  length_ = 4;
   success = WriteUInt8(flags);
   length_ = old_length;
   return success;
 }
 
 bool SpdyFrameBuilder::CanWrite(size_t length) const {
   if (length > kLengthMask) {
     DCHECK(false);
     return false;
   }
 
   if (offset_ + length_ + length > capacity_) {
     DCHECK(false);
     return false;
   }
 
   return true;
 }
 
 }  // namespace net