Make fragmentation return a reassembled PacketBuffer

This allows later decoupling of the backing network buffer implementation.

PiperOrigin-RevId: 354643297

1 files changed, 22 insertions, 0 deletions

diff --git a/pkg/tcpip/buffer/view_unsafe.go b/pkg/tcpip/buffer/view_unsafe.go
new file mode 100644
index 000000000..75ccd40f8
--- /dev/null
+++ b/pkg/tcpip/buffer/view_unsafe.go
@@ -0,0 +1,22 @@
+// Copyright 2021 The gVisor Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package buffer
+
+import "unsafe"
+
+const (
+	vectorisedViewStructSize = int(unsafe.Sizeof(VectorisedView{}))
+	viewStructSize           = int(unsafe.Sizeof(View{}))
+)