what about with bad GRO on UDP

packet/outpacket.go

@@ -0,0 +1,23 @@
+package packet
+
+type OutPacket struct {
+	Segments [][]byte
+	//todo virtio header?
+	SegSize      int
+	SegCounter   int
+	Valid        bool
+	wasSegmented bool
+
+	Scratch []byte
+}
+
+func NewOut() *OutPacket {
+	out := new(OutPacket)
+	const numSegments = 64
+	out.Segments = make([][]byte, numSegments)
+	for i := 0; i < numSegments; i++ { //todo this is dumb
+		out.Segments[i] = make([]byte, Size)
+	}
+	out.Scratch = make([]byte, Size)
+	return out
+}