1. A method comprising: receiving, by a device, a packet, of a packet stream, the packet including a plurality of control tags in a header portion of the packet; determining, by the device, a value stored in a first field of a first control tag of the plurality of control tags; performing, by the device, a lookup operation, using the value, to determine a first index value; obtaining, by the device and based on the first index value, a ruleset, associated with processing the plurality of control tags, from a memory; determining, by the device and based on the value, a second index value that references an entry in the ruleset; determining, by the device and based on the entry, a length of the first control tag and a category associated with the first control tag, the category associated with the first control tag indicating that the first control tag corresponds to an unambiguous interposable (UI) control tag, the UI control tag being: interposable within a sequence, of the plurality of control tags, within the header portion of the packet, and uniquely identified by the value; determining, by the device and based on the ruleset and the first control tag corresponding to the UI control tag, one or more processing operations, associated with the UI control tag, using the value; performing, by the device, the one or more processing operations on the first control tag to determine processing indicated by the first control tag; performing, by the device, the processing indicated by the first control tag on the packet; and determining a start of a second control tag, of the plurality of control tags, based on the length of the first control tag.