by Darius Kazemi, April 3 2019

In 2019 I'm reading one RFC a day in chronological order starting from the very first one. More on this project here. There is a table of contents for all my RFC posts.

Code zero

RFC-93 is titled “Initial Connection Protocol”. It's authored by Alex McKenzie of BBN, dated January 1971 (no day of month).

The technical content

This RFC points out an ambiguity in RFC-66 and RFC-80. There is a control message sent during the initial connection “defined as 'exactly an even 32 bit number'”. It's unclear what the message type code for this message is supposed to be. This is kind of amusing because there is only one message type code currently defined (code zero), but they want things to be as clear as possible in case further message type codes are defined in the future. They suggest amending the intitial connection protocol to specify that it is, indeed, code zero.

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About me

I'm Darius Kazemi. I'm a Mozilla Fellow and I do a lot of work on the decentralized web with both ActivityPub and the Dat Project.