IP datagram reassembly algorithms, July 1982
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This RFC describes an alternate approach of dealing with reassembly which reduces the bookkeeping problem to a minimum, and requires only one buffer for storage equal in size to the final datagram being reassembled, which can reassemble a datagram from any number of fragments arriving in any order with any possible pattern of overlap and duplication, and which is appropriate for almost any sort of operating system.
For the definition of Status, see RFC 2026.
For the definition of Stream, see RFC 8729.