On Fri, May 21, 1999 at 02:25:23PM +0100, Ben Laurie wrote:
> Bodo Moeller wrote:
>> On Fri, May 21, 1999 at 09:08:52AM +0200, Ralf S. Engelschall wrote:
>>>> What exactly does Apache with mod_ssl do when shutting down an SSL
>>>> connection (in the default case)? Does it send its close_notify alert
>>>> and then send a FIN -- i.e. shutdown(..., SHUT_WR) -- so that the
>>>> browser still can write TCP data, or does it send the close_notify
>>>> alert and then immediately perform a (half-duplex) close(...)?
>>> ^^^^ half? you mean full, right?
>> Maybe I *mean* "full-duplex", but I did intend to write "half-duplex" :-)
>> That's the term used in RFC 1122; it looks just as strange to me as it
>> does to you, but as the standard uses that terminology ...
> Hmmm ... leaving aside what is meant, the term "half-duplex close" is
> entirely non-standard ... the correct term is "half-close", surely?
No, it's exactly the opposite: Instead of keeping a half-closed
connection (where the party that initiated the close stays in
FIN-WAIT-2 state and the other party stays in CLOSE-WAIT until it
decides to close its sending direction too), one party closes both
directions. That does not fit into the world-view of RFC 793, but is
allowed by RFC 1122. Since these two RFCs are Internet Standards and
RFC 1122 uses the term "half-duplex close", calling this term "entirely
non-standard" is, well, entirely non-standard :-)
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