1                   2                   3
 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+---------------+---------------+---------------+---------------+
|    Version    |  PacketType   |         PacketLength          |
+---------------+---------------+---------------+---------------+
|           PacketType specific fields          | HeaderLength  |
+---------------+---------------+---------------+---------------+
/ Optional Hop-by-hop header TLVs                               /
+---------------+---------------+---------------+---------------+
/ PacketPayload TLVs                                            /
+---------------+---------------+---------------+---------------+
/ Optional CCNx ValidationAlgorithm TLV                         /
+---------------+---------------+---------------+---------------+
/ Optional CCNx ValidationPayload TLV (ValidationAlg required)  /
+---------------+---------------+---------------+---------------+