P4 (programming language): Difference between revisions

Revision as of 16:00, 14 February 2023

Revision as of 10:43, 2 March 2023

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===Headers===

Header definitions describe packet formats and provide names for the fields within the packet. The language allows customized header names and fields of arbitrary length, although many header definitions use widely known protocol names and fields widths. For example, an [[IEEE 802.3|802.3]] Ethernet header definition might be called “Ethernet” and consist of the a 48-bit field named “dest” followed by a 48-bit “src” field, followed by a 16-bit “type” field. The names in a header definition are used later in the P4 program to reference these fields.

===Parsers===