Thank you Russ.
Russ Cox a écrit :
So unless Russ is right and that the
fact FIDS are choosen by the client has
been decided arbitrarily ... I still have
no answer to my question.
In the current version of 9P, there is no reason
why the client has to choose the fids (file ids).
You don't have to believe me, but it's true.
The client must choose the tags (request ids)
since it sends the first request message without
any input from the server. The tags are what
enable having multiple messages outstanding.
There is an historical reason why fids are
chosen by the client, but like most historical
reasons, it no longer applies. In very early
versions of 9P (before the first edition release),
there were no tags. Replies were matched
based on fid and type, so fids had to be chosen
by the client, just as tags do now.
Tags were introduced on November 21, 1990:
http://swtch.com/go/fid2tag
Russ
