2 files changed, 14 insertions, 2 deletions
diff --git a/pkg/tcpip/buffer/BUILD b/pkg/tcpip/buffer/BUILD
index 3301967fb..d6c31bfa2 100644
--- a/pkg/tcpip/buffer/BUILD
+++ b/pkg/tcpip/buffer/BUILD
@@ -1,6 +1,7 @@
-package(licenses = ["notice"])
+load("@io_bazel_rules_go//go:def.bzl", "go_test")
+load("//tools/go_stateify:defs.bzl", "go_library")
 
-load("//tools/go_stateify:defs.bzl", "go_library", "go_test")
+package(licenses = ["notice"])
 
 go_library(
     name = "buffer",
diff --git a/pkg/tcpip/buffer/prependable.go b/pkg/tcpip/buffer/prependable.go
index 4287464f3..ba21f4eca 100644
--- a/pkg/tcpip/buffer/prependable.go
+++ b/pkg/tcpip/buffer/prependable.go
@@ -41,6 +41,11 @@ func NewPrependableFromView(v View) Prependable {
 	return Prependable{buf: v, usedIdx: 0}
 }
 
+// NewEmptyPrependableFromView creates a new prependable buffer from a View.
+func NewEmptyPrependableFromView(v View) Prependable {
+	return Prependable{buf: v, usedIdx: len(v)}
+}
+
 // View returns a View of the backing buffer that contains all prepended
 // data so far.
 func (p Prependable) View() View {
@@ -72,3 +77,9 @@ func (p *Prependable) Prepend(size int) []byte {
 	p.usedIdx -= size
 	return p.View()[:size:size]
 }
+
+// DeepCopy copies p and the bytes backing it.
+func (p Prependable) DeepCopy() Prependable {
+	p.buf = append(View(nil), p.buf...)
+	return p
+}