1 files changed, 26 insertions, 0 deletions
diff --git a/pkg/tcpip/packet_buffer_state.go b/pkg/tcpip/packet_buffer_state.go
new file mode 100644
index 000000000..04c4cf136
--- /dev/null
+++ b/pkg/tcpip/packet_buffer_state.go
@@ -0,0 +1,26 @@
+// Copyright 2019 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 tcpip
+
+import "gvisor.dev/gvisor/pkg/tcpip/buffer"
+
+// beforeSave is invoked by stateify.
+func (pk *PacketBuffer) beforeSave() {
+	// Non-Data fields may be slices of the Data field. This causes
+	// problems for SR, so during save we make each header independent.
+	pk.LinkHeader = append(buffer.View(nil), pk.LinkHeader...)
+	pk.NetworkHeader = append(buffer.View(nil), pk.NetworkHeader...)
+	pk.TransportHeader = append(buffer.View(nil), pk.TransportHeader...)
+}